1 /* 32-bit ELF support for ARM
2 Copyright (C) 1998-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
25 #include "bfd_stdint.h"
26 #include "libiberty.h"
30 #include "elf-vxworks.h"
33 /* Return the relocation section associated with NAME. HTAB is the
34 bfd's elf32_arm_link_hash_entry. */
35 #define RELOC_SECTION(HTAB, NAME) \
36 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
38 /* Return size of a relocation entry. HTAB is the bfd's
39 elf32_arm_link_hash_entry. */
40 #define RELOC_SIZE(HTAB) \
42 ? sizeof (Elf32_External_Rel) \
43 : sizeof (Elf32_External_Rela))
45 /* Return function to swap relocations in. HTAB is the bfd's
46 elf32_arm_link_hash_entry. */
47 #define SWAP_RELOC_IN(HTAB) \
49 ? bfd_elf32_swap_reloc_in \
50 : bfd_elf32_swap_reloca_in)
52 /* Return function to swap relocations out. HTAB is the bfd's
53 elf32_arm_link_hash_entry. */
54 #define SWAP_RELOC_OUT(HTAB) \
56 ? bfd_elf32_swap_reloc_out \
57 : bfd_elf32_swap_reloca_out)
59 #define elf_info_to_howto 0
60 #define elf_info_to_howto_rel elf32_arm_info_to_howto
62 #define ARM_ELF_ABI_VERSION 0
63 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
65 /* The Adjusted Place, as defined by AAELF. */
66 #define Pa(X) ((X) & 0xfffffffc)
68 static bfd_boolean elf32_arm_write_section (bfd *output_bfd,
69 struct bfd_link_info *link_info,
73 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
74 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
77 static reloc_howto_type elf32_arm_howto_table_1[] =
80 HOWTO (R_ARM_NONE, /* type */
82 3, /* size (0 = byte, 1 = short, 2 = long) */
84 FALSE, /* pc_relative */
86 complain_overflow_dont,/* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_ARM_NONE", /* name */
89 FALSE, /* partial_inplace */
92 FALSE), /* pcrel_offset */
94 HOWTO (R_ARM_PC24, /* type */
96 2, /* size (0 = byte, 1 = short, 2 = long) */
98 TRUE, /* pc_relative */
100 complain_overflow_signed,/* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_ARM_PC24", /* name */
103 FALSE, /* partial_inplace */
104 0x00ffffff, /* src_mask */
105 0x00ffffff, /* dst_mask */
106 TRUE), /* pcrel_offset */
108 /* 32 bit absolute */
109 HOWTO (R_ARM_ABS32, /* type */
111 2, /* size (0 = byte, 1 = short, 2 = long) */
113 FALSE, /* pc_relative */
115 complain_overflow_bitfield,/* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_ARM_ABS32", /* name */
118 FALSE, /* partial_inplace */
119 0xffffffff, /* src_mask */
120 0xffffffff, /* dst_mask */
121 FALSE), /* pcrel_offset */
123 /* standard 32bit pc-relative reloc */
124 HOWTO (R_ARM_REL32, /* type */
126 2, /* size (0 = byte, 1 = short, 2 = long) */
128 TRUE, /* pc_relative */
130 complain_overflow_bitfield,/* complain_on_overflow */
131 bfd_elf_generic_reloc, /* special_function */
132 "R_ARM_REL32", /* name */
133 FALSE, /* partial_inplace */
134 0xffffffff, /* src_mask */
135 0xffffffff, /* dst_mask */
136 TRUE), /* pcrel_offset */
138 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
139 HOWTO (R_ARM_LDR_PC_G0, /* type */
141 0, /* size (0 = byte, 1 = short, 2 = long) */
143 TRUE, /* pc_relative */
145 complain_overflow_dont,/* complain_on_overflow */
146 bfd_elf_generic_reloc, /* special_function */
147 "R_ARM_LDR_PC_G0", /* name */
148 FALSE, /* partial_inplace */
149 0xffffffff, /* src_mask */
150 0xffffffff, /* dst_mask */
151 TRUE), /* pcrel_offset */
153 /* 16 bit absolute */
154 HOWTO (R_ARM_ABS16, /* type */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
158 FALSE, /* pc_relative */
160 complain_overflow_bitfield,/* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_ARM_ABS16", /* name */
163 FALSE, /* partial_inplace */
164 0x0000ffff, /* src_mask */
165 0x0000ffff, /* dst_mask */
166 FALSE), /* pcrel_offset */
168 /* 12 bit absolute */
169 HOWTO (R_ARM_ABS12, /* type */
171 2, /* size (0 = byte, 1 = short, 2 = long) */
173 FALSE, /* pc_relative */
175 complain_overflow_bitfield,/* complain_on_overflow */
176 bfd_elf_generic_reloc, /* special_function */
177 "R_ARM_ABS12", /* name */
178 FALSE, /* partial_inplace */
179 0x00000fff, /* src_mask */
180 0x00000fff, /* dst_mask */
181 FALSE), /* pcrel_offset */
183 HOWTO (R_ARM_THM_ABS5, /* type */
185 1, /* size (0 = byte, 1 = short, 2 = long) */
187 FALSE, /* pc_relative */
189 complain_overflow_bitfield,/* complain_on_overflow */
190 bfd_elf_generic_reloc, /* special_function */
191 "R_ARM_THM_ABS5", /* name */
192 FALSE, /* partial_inplace */
193 0x000007e0, /* src_mask */
194 0x000007e0, /* dst_mask */
195 FALSE), /* pcrel_offset */
198 HOWTO (R_ARM_ABS8, /* type */
200 0, /* size (0 = byte, 1 = short, 2 = long) */
202 FALSE, /* pc_relative */
204 complain_overflow_bitfield,/* complain_on_overflow */
205 bfd_elf_generic_reloc, /* special_function */
206 "R_ARM_ABS8", /* name */
207 FALSE, /* partial_inplace */
208 0x000000ff, /* src_mask */
209 0x000000ff, /* dst_mask */
210 FALSE), /* pcrel_offset */
212 HOWTO (R_ARM_SBREL32, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE, /* pc_relative */
218 complain_overflow_dont,/* complain_on_overflow */
219 bfd_elf_generic_reloc, /* special_function */
220 "R_ARM_SBREL32", /* name */
221 FALSE, /* partial_inplace */
222 0xffffffff, /* src_mask */
223 0xffffffff, /* dst_mask */
224 FALSE), /* pcrel_offset */
226 HOWTO (R_ARM_THM_CALL, /* type */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
230 TRUE, /* pc_relative */
232 complain_overflow_signed,/* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_ARM_THM_CALL", /* name */
235 FALSE, /* partial_inplace */
236 0x07ff2fff, /* src_mask */
237 0x07ff2fff, /* dst_mask */
238 TRUE), /* pcrel_offset */
240 HOWTO (R_ARM_THM_PC8, /* type */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
244 TRUE, /* pc_relative */
246 complain_overflow_signed,/* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_ARM_THM_PC8", /* name */
249 FALSE, /* partial_inplace */
250 0x000000ff, /* src_mask */
251 0x000000ff, /* dst_mask */
252 TRUE), /* pcrel_offset */
254 HOWTO (R_ARM_BREL_ADJ, /* type */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
258 FALSE, /* pc_relative */
260 complain_overflow_signed,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_ARM_BREL_ADJ", /* name */
263 FALSE, /* partial_inplace */
264 0xffffffff, /* src_mask */
265 0xffffffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
268 HOWTO (R_ARM_TLS_DESC, /* type */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
272 FALSE, /* pc_relative */
274 complain_overflow_bitfield,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_ARM_TLS_DESC", /* name */
277 FALSE, /* partial_inplace */
278 0xffffffff, /* src_mask */
279 0xffffffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
282 HOWTO (R_ARM_THM_SWI8, /* type */
284 0, /* size (0 = byte, 1 = short, 2 = long) */
286 FALSE, /* pc_relative */
288 complain_overflow_signed,/* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_ARM_SWI8", /* name */
291 FALSE, /* partial_inplace */
292 0x00000000, /* src_mask */
293 0x00000000, /* dst_mask */
294 FALSE), /* pcrel_offset */
296 /* BLX instruction for the ARM. */
297 HOWTO (R_ARM_XPC25, /* type */
299 2, /* size (0 = byte, 1 = short, 2 = long) */
301 TRUE, /* pc_relative */
303 complain_overflow_signed,/* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_ARM_XPC25", /* name */
306 FALSE, /* partial_inplace */
307 0x00ffffff, /* src_mask */
308 0x00ffffff, /* dst_mask */
309 TRUE), /* pcrel_offset */
311 /* BLX instruction for the Thumb. */
312 HOWTO (R_ARM_THM_XPC22, /* type */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
316 TRUE, /* pc_relative */
318 complain_overflow_signed,/* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_ARM_THM_XPC22", /* name */
321 FALSE, /* partial_inplace */
322 0x07ff2fff, /* src_mask */
323 0x07ff2fff, /* dst_mask */
324 TRUE), /* pcrel_offset */
326 /* Dynamic TLS relocations. */
328 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
332 FALSE, /* pc_relative */
334 complain_overflow_bitfield,/* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_ARM_TLS_DTPMOD32", /* name */
337 TRUE, /* partial_inplace */
338 0xffffffff, /* src_mask */
339 0xffffffff, /* dst_mask */
340 FALSE), /* pcrel_offset */
342 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
346 FALSE, /* pc_relative */
348 complain_overflow_bitfield,/* complain_on_overflow */
349 bfd_elf_generic_reloc, /* special_function */
350 "R_ARM_TLS_DTPOFF32", /* name */
351 TRUE, /* partial_inplace */
352 0xffffffff, /* src_mask */
353 0xffffffff, /* dst_mask */
354 FALSE), /* pcrel_offset */
356 HOWTO (R_ARM_TLS_TPOFF32, /* type */
358 2, /* size (0 = byte, 1 = short, 2 = long) */
360 FALSE, /* pc_relative */
362 complain_overflow_bitfield,/* complain_on_overflow */
363 bfd_elf_generic_reloc, /* special_function */
364 "R_ARM_TLS_TPOFF32", /* name */
365 TRUE, /* partial_inplace */
366 0xffffffff, /* src_mask */
367 0xffffffff, /* dst_mask */
368 FALSE), /* pcrel_offset */
370 /* Relocs used in ARM Linux */
372 HOWTO (R_ARM_COPY, /* type */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
376 FALSE, /* pc_relative */
378 complain_overflow_bitfield,/* complain_on_overflow */
379 bfd_elf_generic_reloc, /* special_function */
380 "R_ARM_COPY", /* name */
381 TRUE, /* partial_inplace */
382 0xffffffff, /* src_mask */
383 0xffffffff, /* dst_mask */
384 FALSE), /* pcrel_offset */
386 HOWTO (R_ARM_GLOB_DAT, /* type */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
390 FALSE, /* pc_relative */
392 complain_overflow_bitfield,/* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 "R_ARM_GLOB_DAT", /* name */
395 TRUE, /* partial_inplace */
396 0xffffffff, /* src_mask */
397 0xffffffff, /* dst_mask */
398 FALSE), /* pcrel_offset */
400 HOWTO (R_ARM_JUMP_SLOT, /* type */
402 2, /* size (0 = byte, 1 = short, 2 = long) */
404 FALSE, /* pc_relative */
406 complain_overflow_bitfield,/* complain_on_overflow */
407 bfd_elf_generic_reloc, /* special_function */
408 "R_ARM_JUMP_SLOT", /* name */
409 TRUE, /* partial_inplace */
410 0xffffffff, /* src_mask */
411 0xffffffff, /* dst_mask */
412 FALSE), /* pcrel_offset */
414 HOWTO (R_ARM_RELATIVE, /* type */
416 2, /* size (0 = byte, 1 = short, 2 = long) */
418 FALSE, /* pc_relative */
420 complain_overflow_bitfield,/* complain_on_overflow */
421 bfd_elf_generic_reloc, /* special_function */
422 "R_ARM_RELATIVE", /* name */
423 TRUE, /* partial_inplace */
424 0xffffffff, /* src_mask */
425 0xffffffff, /* dst_mask */
426 FALSE), /* pcrel_offset */
428 HOWTO (R_ARM_GOTOFF32, /* type */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
432 FALSE, /* pc_relative */
434 complain_overflow_bitfield,/* complain_on_overflow */
435 bfd_elf_generic_reloc, /* special_function */
436 "R_ARM_GOTOFF32", /* name */
437 TRUE, /* partial_inplace */
438 0xffffffff, /* src_mask */
439 0xffffffff, /* dst_mask */
440 FALSE), /* pcrel_offset */
442 HOWTO (R_ARM_GOTPC, /* type */
444 2, /* size (0 = byte, 1 = short, 2 = long) */
446 TRUE, /* pc_relative */
448 complain_overflow_bitfield,/* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_ARM_GOTPC", /* name */
451 TRUE, /* partial_inplace */
452 0xffffffff, /* src_mask */
453 0xffffffff, /* dst_mask */
454 TRUE), /* pcrel_offset */
456 HOWTO (R_ARM_GOT32, /* type */
458 2, /* size (0 = byte, 1 = short, 2 = long) */
460 FALSE, /* pc_relative */
462 complain_overflow_bitfield,/* complain_on_overflow */
463 bfd_elf_generic_reloc, /* special_function */
464 "R_ARM_GOT32", /* name */
465 TRUE, /* partial_inplace */
466 0xffffffff, /* src_mask */
467 0xffffffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
470 HOWTO (R_ARM_PLT32, /* type */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
474 TRUE, /* pc_relative */
476 complain_overflow_bitfield,/* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 "R_ARM_PLT32", /* name */
479 FALSE, /* partial_inplace */
480 0x00ffffff, /* src_mask */
481 0x00ffffff, /* dst_mask */
482 TRUE), /* pcrel_offset */
484 HOWTO (R_ARM_CALL, /* type */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
488 TRUE, /* pc_relative */
490 complain_overflow_signed,/* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_ARM_CALL", /* name */
493 FALSE, /* partial_inplace */
494 0x00ffffff, /* src_mask */
495 0x00ffffff, /* dst_mask */
496 TRUE), /* pcrel_offset */
498 HOWTO (R_ARM_JUMP24, /* type */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
502 TRUE, /* pc_relative */
504 complain_overflow_signed,/* complain_on_overflow */
505 bfd_elf_generic_reloc, /* special_function */
506 "R_ARM_JUMP24", /* name */
507 FALSE, /* partial_inplace */
508 0x00ffffff, /* src_mask */
509 0x00ffffff, /* dst_mask */
510 TRUE), /* pcrel_offset */
512 HOWTO (R_ARM_THM_JUMP24, /* type */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
516 TRUE, /* pc_relative */
518 complain_overflow_signed,/* complain_on_overflow */
519 bfd_elf_generic_reloc, /* special_function */
520 "R_ARM_THM_JUMP24", /* name */
521 FALSE, /* partial_inplace */
522 0x07ff2fff, /* src_mask */
523 0x07ff2fff, /* dst_mask */
524 TRUE), /* pcrel_offset */
526 HOWTO (R_ARM_BASE_ABS, /* type */
528 2, /* size (0 = byte, 1 = short, 2 = long) */
530 FALSE, /* pc_relative */
532 complain_overflow_dont,/* complain_on_overflow */
533 bfd_elf_generic_reloc, /* special_function */
534 "R_ARM_BASE_ABS", /* name */
535 FALSE, /* partial_inplace */
536 0xffffffff, /* src_mask */
537 0xffffffff, /* dst_mask */
538 FALSE), /* pcrel_offset */
540 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
544 TRUE, /* pc_relative */
546 complain_overflow_dont,/* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_ARM_ALU_PCREL_7_0", /* name */
549 FALSE, /* partial_inplace */
550 0x00000fff, /* src_mask */
551 0x00000fff, /* dst_mask */
552 TRUE), /* pcrel_offset */
554 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 TRUE, /* pc_relative */
560 complain_overflow_dont,/* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_ARM_ALU_PCREL_15_8",/* name */
563 FALSE, /* partial_inplace */
564 0x00000fff, /* src_mask */
565 0x00000fff, /* dst_mask */
566 TRUE), /* pcrel_offset */
568 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 TRUE, /* pc_relative */
574 complain_overflow_dont,/* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_ARM_ALU_PCREL_23_15",/* name */
577 FALSE, /* partial_inplace */
578 0x00000fff, /* src_mask */
579 0x00000fff, /* dst_mask */
580 TRUE), /* pcrel_offset */
582 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 FALSE, /* pc_relative */
588 complain_overflow_dont,/* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_ARM_LDR_SBREL_11_0",/* name */
591 FALSE, /* partial_inplace */
592 0x00000fff, /* src_mask */
593 0x00000fff, /* dst_mask */
594 FALSE), /* pcrel_offset */
596 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE, /* pc_relative */
602 complain_overflow_dont,/* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_ARM_ALU_SBREL_19_12",/* name */
605 FALSE, /* partial_inplace */
606 0x000ff000, /* src_mask */
607 0x000ff000, /* dst_mask */
608 FALSE), /* pcrel_offset */
610 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 FALSE, /* pc_relative */
616 complain_overflow_dont,/* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_ARM_ALU_SBREL_27_20",/* name */
619 FALSE, /* partial_inplace */
620 0x0ff00000, /* src_mask */
621 0x0ff00000, /* dst_mask */
622 FALSE), /* pcrel_offset */
624 HOWTO (R_ARM_TARGET1, /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 FALSE, /* pc_relative */
630 complain_overflow_dont,/* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_ARM_TARGET1", /* name */
633 FALSE, /* partial_inplace */
634 0xffffffff, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
638 HOWTO (R_ARM_ROSEGREL32, /* type */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
642 FALSE, /* pc_relative */
644 complain_overflow_dont,/* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 "R_ARM_ROSEGREL32", /* name */
647 FALSE, /* partial_inplace */
648 0xffffffff, /* src_mask */
649 0xffffffff, /* dst_mask */
650 FALSE), /* pcrel_offset */
652 HOWTO (R_ARM_V4BX, /* type */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
656 FALSE, /* pc_relative */
658 complain_overflow_dont,/* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_ARM_V4BX", /* name */
661 FALSE, /* partial_inplace */
662 0xffffffff, /* src_mask */
663 0xffffffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
666 HOWTO (R_ARM_TARGET2, /* type */
668 2, /* size (0 = byte, 1 = short, 2 = long) */
670 FALSE, /* pc_relative */
672 complain_overflow_signed,/* complain_on_overflow */
673 bfd_elf_generic_reloc, /* special_function */
674 "R_ARM_TARGET2", /* name */
675 FALSE, /* partial_inplace */
676 0xffffffff, /* src_mask */
677 0xffffffff, /* dst_mask */
678 TRUE), /* pcrel_offset */
680 HOWTO (R_ARM_PREL31, /* type */
682 2, /* size (0 = byte, 1 = short, 2 = long) */
684 TRUE, /* pc_relative */
686 complain_overflow_signed,/* complain_on_overflow */
687 bfd_elf_generic_reloc, /* special_function */
688 "R_ARM_PREL31", /* name */
689 FALSE, /* partial_inplace */
690 0x7fffffff, /* src_mask */
691 0x7fffffff, /* dst_mask */
692 TRUE), /* pcrel_offset */
694 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
696 2, /* size (0 = byte, 1 = short, 2 = long) */
698 FALSE, /* pc_relative */
700 complain_overflow_dont,/* complain_on_overflow */
701 bfd_elf_generic_reloc, /* special_function */
702 "R_ARM_MOVW_ABS_NC", /* name */
703 FALSE, /* partial_inplace */
704 0x000f0fff, /* src_mask */
705 0x000f0fff, /* dst_mask */
706 FALSE), /* pcrel_offset */
708 HOWTO (R_ARM_MOVT_ABS, /* type */
710 2, /* size (0 = byte, 1 = short, 2 = long) */
712 FALSE, /* pc_relative */
714 complain_overflow_bitfield,/* complain_on_overflow */
715 bfd_elf_generic_reloc, /* special_function */
716 "R_ARM_MOVT_ABS", /* name */
717 FALSE, /* partial_inplace */
718 0x000f0fff, /* src_mask */
719 0x000f0fff, /* dst_mask */
720 FALSE), /* pcrel_offset */
722 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
724 2, /* size (0 = byte, 1 = short, 2 = long) */
726 TRUE, /* pc_relative */
728 complain_overflow_dont,/* complain_on_overflow */
729 bfd_elf_generic_reloc, /* special_function */
730 "R_ARM_MOVW_PREL_NC", /* name */
731 FALSE, /* partial_inplace */
732 0x000f0fff, /* src_mask */
733 0x000f0fff, /* dst_mask */
734 TRUE), /* pcrel_offset */
736 HOWTO (R_ARM_MOVT_PREL, /* type */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
740 TRUE, /* pc_relative */
742 complain_overflow_bitfield,/* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_ARM_MOVT_PREL", /* name */
745 FALSE, /* partial_inplace */
746 0x000f0fff, /* src_mask */
747 0x000f0fff, /* dst_mask */
748 TRUE), /* pcrel_offset */
750 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
754 FALSE, /* pc_relative */
756 complain_overflow_dont,/* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_ARM_THM_MOVW_ABS_NC",/* name */
759 FALSE, /* partial_inplace */
760 0x040f70ff, /* src_mask */
761 0x040f70ff, /* dst_mask */
762 FALSE), /* pcrel_offset */
764 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
766 2, /* size (0 = byte, 1 = short, 2 = long) */
768 FALSE, /* pc_relative */
770 complain_overflow_bitfield,/* complain_on_overflow */
771 bfd_elf_generic_reloc, /* special_function */
772 "R_ARM_THM_MOVT_ABS", /* name */
773 FALSE, /* partial_inplace */
774 0x040f70ff, /* src_mask */
775 0x040f70ff, /* dst_mask */
776 FALSE), /* pcrel_offset */
778 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
780 2, /* size (0 = byte, 1 = short, 2 = long) */
782 TRUE, /* pc_relative */
784 complain_overflow_dont,/* complain_on_overflow */
785 bfd_elf_generic_reloc, /* special_function */
786 "R_ARM_THM_MOVW_PREL_NC",/* name */
787 FALSE, /* partial_inplace */
788 0x040f70ff, /* src_mask */
789 0x040f70ff, /* dst_mask */
790 TRUE), /* pcrel_offset */
792 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
794 2, /* size (0 = byte, 1 = short, 2 = long) */
796 TRUE, /* pc_relative */
798 complain_overflow_bitfield,/* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_ARM_THM_MOVT_PREL", /* name */
801 FALSE, /* partial_inplace */
802 0x040f70ff, /* src_mask */
803 0x040f70ff, /* dst_mask */
804 TRUE), /* pcrel_offset */
806 HOWTO (R_ARM_THM_JUMP19, /* type */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
810 TRUE, /* pc_relative */
812 complain_overflow_signed,/* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_ARM_THM_JUMP19", /* name */
815 FALSE, /* partial_inplace */
816 0x043f2fff, /* src_mask */
817 0x043f2fff, /* dst_mask */
818 TRUE), /* pcrel_offset */
820 HOWTO (R_ARM_THM_JUMP6, /* type */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
824 TRUE, /* pc_relative */
826 complain_overflow_unsigned,/* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_ARM_THM_JUMP6", /* name */
829 FALSE, /* partial_inplace */
830 0x02f8, /* src_mask */
831 0x02f8, /* dst_mask */
832 TRUE), /* pcrel_offset */
834 /* These are declared as 13-bit signed relocations because we can
835 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
837 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
839 2, /* size (0 = byte, 1 = short, 2 = long) */
841 TRUE, /* pc_relative */
843 complain_overflow_dont,/* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_ARM_THM_ALU_PREL_11_0",/* name */
846 FALSE, /* partial_inplace */
847 0xffffffff, /* src_mask */
848 0xffffffff, /* dst_mask */
849 TRUE), /* pcrel_offset */
851 HOWTO (R_ARM_THM_PC12, /* type */
853 2, /* size (0 = byte, 1 = short, 2 = long) */
855 TRUE, /* pc_relative */
857 complain_overflow_dont,/* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_ARM_THM_PC12", /* name */
860 FALSE, /* partial_inplace */
861 0xffffffff, /* src_mask */
862 0xffffffff, /* dst_mask */
863 TRUE), /* pcrel_offset */
865 HOWTO (R_ARM_ABS32_NOI, /* type */
867 2, /* size (0 = byte, 1 = short, 2 = long) */
869 FALSE, /* pc_relative */
871 complain_overflow_dont,/* complain_on_overflow */
872 bfd_elf_generic_reloc, /* special_function */
873 "R_ARM_ABS32_NOI", /* name */
874 FALSE, /* partial_inplace */
875 0xffffffff, /* src_mask */
876 0xffffffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
879 HOWTO (R_ARM_REL32_NOI, /* type */
881 2, /* size (0 = byte, 1 = short, 2 = long) */
883 TRUE, /* pc_relative */
885 complain_overflow_dont,/* complain_on_overflow */
886 bfd_elf_generic_reloc, /* special_function */
887 "R_ARM_REL32_NOI", /* name */
888 FALSE, /* partial_inplace */
889 0xffffffff, /* src_mask */
890 0xffffffff, /* dst_mask */
891 FALSE), /* pcrel_offset */
893 /* Group relocations. */
895 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
897 2, /* size (0 = byte, 1 = short, 2 = long) */
899 TRUE, /* pc_relative */
901 complain_overflow_dont,/* complain_on_overflow */
902 bfd_elf_generic_reloc, /* special_function */
903 "R_ARM_ALU_PC_G0_NC", /* name */
904 FALSE, /* partial_inplace */
905 0xffffffff, /* src_mask */
906 0xffffffff, /* dst_mask */
907 TRUE), /* pcrel_offset */
909 HOWTO (R_ARM_ALU_PC_G0, /* type */
911 2, /* size (0 = byte, 1 = short, 2 = long) */
913 TRUE, /* pc_relative */
915 complain_overflow_dont,/* complain_on_overflow */
916 bfd_elf_generic_reloc, /* special_function */
917 "R_ARM_ALU_PC_G0", /* name */
918 FALSE, /* partial_inplace */
919 0xffffffff, /* src_mask */
920 0xffffffff, /* dst_mask */
921 TRUE), /* pcrel_offset */
923 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
925 2, /* size (0 = byte, 1 = short, 2 = long) */
927 TRUE, /* pc_relative */
929 complain_overflow_dont,/* complain_on_overflow */
930 bfd_elf_generic_reloc, /* special_function */
931 "R_ARM_ALU_PC_G1_NC", /* name */
932 FALSE, /* partial_inplace */
933 0xffffffff, /* src_mask */
934 0xffffffff, /* dst_mask */
935 TRUE), /* pcrel_offset */
937 HOWTO (R_ARM_ALU_PC_G1, /* type */
939 2, /* size (0 = byte, 1 = short, 2 = long) */
941 TRUE, /* pc_relative */
943 complain_overflow_dont,/* complain_on_overflow */
944 bfd_elf_generic_reloc, /* special_function */
945 "R_ARM_ALU_PC_G1", /* name */
946 FALSE, /* partial_inplace */
947 0xffffffff, /* src_mask */
948 0xffffffff, /* dst_mask */
949 TRUE), /* pcrel_offset */
951 HOWTO (R_ARM_ALU_PC_G2, /* type */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
955 TRUE, /* pc_relative */
957 complain_overflow_dont,/* complain_on_overflow */
958 bfd_elf_generic_reloc, /* special_function */
959 "R_ARM_ALU_PC_G2", /* name */
960 FALSE, /* partial_inplace */
961 0xffffffff, /* src_mask */
962 0xffffffff, /* dst_mask */
963 TRUE), /* pcrel_offset */
965 HOWTO (R_ARM_LDR_PC_G1, /* type */
967 2, /* size (0 = byte, 1 = short, 2 = long) */
969 TRUE, /* pc_relative */
971 complain_overflow_dont,/* complain_on_overflow */
972 bfd_elf_generic_reloc, /* special_function */
973 "R_ARM_LDR_PC_G1", /* name */
974 FALSE, /* partial_inplace */
975 0xffffffff, /* src_mask */
976 0xffffffff, /* dst_mask */
977 TRUE), /* pcrel_offset */
979 HOWTO (R_ARM_LDR_PC_G2, /* type */
981 2, /* size (0 = byte, 1 = short, 2 = long) */
983 TRUE, /* pc_relative */
985 complain_overflow_dont,/* complain_on_overflow */
986 bfd_elf_generic_reloc, /* special_function */
987 "R_ARM_LDR_PC_G2", /* name */
988 FALSE, /* partial_inplace */
989 0xffffffff, /* src_mask */
990 0xffffffff, /* dst_mask */
991 TRUE), /* pcrel_offset */
993 HOWTO (R_ARM_LDRS_PC_G0, /* type */
995 2, /* size (0 = byte, 1 = short, 2 = long) */
997 TRUE, /* pc_relative */
999 complain_overflow_dont,/* complain_on_overflow */
1000 bfd_elf_generic_reloc, /* special_function */
1001 "R_ARM_LDRS_PC_G0", /* name */
1002 FALSE, /* partial_inplace */
1003 0xffffffff, /* src_mask */
1004 0xffffffff, /* dst_mask */
1005 TRUE), /* pcrel_offset */
1007 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1009 2, /* size (0 = byte, 1 = short, 2 = long) */
1011 TRUE, /* pc_relative */
1013 complain_overflow_dont,/* complain_on_overflow */
1014 bfd_elf_generic_reloc, /* special_function */
1015 "R_ARM_LDRS_PC_G1", /* name */
1016 FALSE, /* partial_inplace */
1017 0xffffffff, /* src_mask */
1018 0xffffffff, /* dst_mask */
1019 TRUE), /* pcrel_offset */
1021 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1023 2, /* size (0 = byte, 1 = short, 2 = long) */
1025 TRUE, /* pc_relative */
1027 complain_overflow_dont,/* complain_on_overflow */
1028 bfd_elf_generic_reloc, /* special_function */
1029 "R_ARM_LDRS_PC_G2", /* name */
1030 FALSE, /* partial_inplace */
1031 0xffffffff, /* src_mask */
1032 0xffffffff, /* dst_mask */
1033 TRUE), /* pcrel_offset */
1035 HOWTO (R_ARM_LDC_PC_G0, /* type */
1037 2, /* size (0 = byte, 1 = short, 2 = long) */
1039 TRUE, /* pc_relative */
1041 complain_overflow_dont,/* complain_on_overflow */
1042 bfd_elf_generic_reloc, /* special_function */
1043 "R_ARM_LDC_PC_G0", /* name */
1044 FALSE, /* partial_inplace */
1045 0xffffffff, /* src_mask */
1046 0xffffffff, /* dst_mask */
1047 TRUE), /* pcrel_offset */
1049 HOWTO (R_ARM_LDC_PC_G1, /* type */
1051 2, /* size (0 = byte, 1 = short, 2 = long) */
1053 TRUE, /* pc_relative */
1055 complain_overflow_dont,/* complain_on_overflow */
1056 bfd_elf_generic_reloc, /* special_function */
1057 "R_ARM_LDC_PC_G1", /* name */
1058 FALSE, /* partial_inplace */
1059 0xffffffff, /* src_mask */
1060 0xffffffff, /* dst_mask */
1061 TRUE), /* pcrel_offset */
1063 HOWTO (R_ARM_LDC_PC_G2, /* type */
1065 2, /* size (0 = byte, 1 = short, 2 = long) */
1067 TRUE, /* pc_relative */
1069 complain_overflow_dont,/* complain_on_overflow */
1070 bfd_elf_generic_reloc, /* special_function */
1071 "R_ARM_LDC_PC_G2", /* name */
1072 FALSE, /* partial_inplace */
1073 0xffffffff, /* src_mask */
1074 0xffffffff, /* dst_mask */
1075 TRUE), /* pcrel_offset */
1077 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1079 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 TRUE, /* pc_relative */
1083 complain_overflow_dont,/* complain_on_overflow */
1084 bfd_elf_generic_reloc, /* special_function */
1085 "R_ARM_ALU_SB_G0_NC", /* name */
1086 FALSE, /* partial_inplace */
1087 0xffffffff, /* src_mask */
1088 0xffffffff, /* dst_mask */
1089 TRUE), /* pcrel_offset */
1091 HOWTO (R_ARM_ALU_SB_G0, /* type */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 TRUE, /* pc_relative */
1097 complain_overflow_dont,/* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 "R_ARM_ALU_SB_G0", /* name */
1100 FALSE, /* partial_inplace */
1101 0xffffffff, /* src_mask */
1102 0xffffffff, /* dst_mask */
1103 TRUE), /* pcrel_offset */
1105 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1107 2, /* size (0 = byte, 1 = short, 2 = long) */
1109 TRUE, /* pc_relative */
1111 complain_overflow_dont,/* complain_on_overflow */
1112 bfd_elf_generic_reloc, /* special_function */
1113 "R_ARM_ALU_SB_G1_NC", /* name */
1114 FALSE, /* partial_inplace */
1115 0xffffffff, /* src_mask */
1116 0xffffffff, /* dst_mask */
1117 TRUE), /* pcrel_offset */
1119 HOWTO (R_ARM_ALU_SB_G1, /* type */
1121 2, /* size (0 = byte, 1 = short, 2 = long) */
1123 TRUE, /* pc_relative */
1125 complain_overflow_dont,/* complain_on_overflow */
1126 bfd_elf_generic_reloc, /* special_function */
1127 "R_ARM_ALU_SB_G1", /* name */
1128 FALSE, /* partial_inplace */
1129 0xffffffff, /* src_mask */
1130 0xffffffff, /* dst_mask */
1131 TRUE), /* pcrel_offset */
1133 HOWTO (R_ARM_ALU_SB_G2, /* type */
1135 2, /* size (0 = byte, 1 = short, 2 = long) */
1137 TRUE, /* pc_relative */
1139 complain_overflow_dont,/* complain_on_overflow */
1140 bfd_elf_generic_reloc, /* special_function */
1141 "R_ARM_ALU_SB_G2", /* name */
1142 FALSE, /* partial_inplace */
1143 0xffffffff, /* src_mask */
1144 0xffffffff, /* dst_mask */
1145 TRUE), /* pcrel_offset */
1147 HOWTO (R_ARM_LDR_SB_G0, /* type */
1149 2, /* size (0 = byte, 1 = short, 2 = long) */
1151 TRUE, /* pc_relative */
1153 complain_overflow_dont,/* complain_on_overflow */
1154 bfd_elf_generic_reloc, /* special_function */
1155 "R_ARM_LDR_SB_G0", /* name */
1156 FALSE, /* partial_inplace */
1157 0xffffffff, /* src_mask */
1158 0xffffffff, /* dst_mask */
1159 TRUE), /* pcrel_offset */
1161 HOWTO (R_ARM_LDR_SB_G1, /* type */
1163 2, /* size (0 = byte, 1 = short, 2 = long) */
1165 TRUE, /* pc_relative */
1167 complain_overflow_dont,/* complain_on_overflow */
1168 bfd_elf_generic_reloc, /* special_function */
1169 "R_ARM_LDR_SB_G1", /* name */
1170 FALSE, /* partial_inplace */
1171 0xffffffff, /* src_mask */
1172 0xffffffff, /* dst_mask */
1173 TRUE), /* pcrel_offset */
1175 HOWTO (R_ARM_LDR_SB_G2, /* type */
1177 2, /* size (0 = byte, 1 = short, 2 = long) */
1179 TRUE, /* pc_relative */
1181 complain_overflow_dont,/* complain_on_overflow */
1182 bfd_elf_generic_reloc, /* special_function */
1183 "R_ARM_LDR_SB_G2", /* name */
1184 FALSE, /* partial_inplace */
1185 0xffffffff, /* src_mask */
1186 0xffffffff, /* dst_mask */
1187 TRUE), /* pcrel_offset */
1189 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1191 2, /* size (0 = byte, 1 = short, 2 = long) */
1193 TRUE, /* pc_relative */
1195 complain_overflow_dont,/* complain_on_overflow */
1196 bfd_elf_generic_reloc, /* special_function */
1197 "R_ARM_LDRS_SB_G0", /* name */
1198 FALSE, /* partial_inplace */
1199 0xffffffff, /* src_mask */
1200 0xffffffff, /* dst_mask */
1201 TRUE), /* pcrel_offset */
1203 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1205 2, /* size (0 = byte, 1 = short, 2 = long) */
1207 TRUE, /* pc_relative */
1209 complain_overflow_dont,/* complain_on_overflow */
1210 bfd_elf_generic_reloc, /* special_function */
1211 "R_ARM_LDRS_SB_G1", /* name */
1212 FALSE, /* partial_inplace */
1213 0xffffffff, /* src_mask */
1214 0xffffffff, /* dst_mask */
1215 TRUE), /* pcrel_offset */
1217 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1219 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 TRUE, /* pc_relative */
1223 complain_overflow_dont,/* complain_on_overflow */
1224 bfd_elf_generic_reloc, /* special_function */
1225 "R_ARM_LDRS_SB_G2", /* name */
1226 FALSE, /* partial_inplace */
1227 0xffffffff, /* src_mask */
1228 0xffffffff, /* dst_mask */
1229 TRUE), /* pcrel_offset */
1231 HOWTO (R_ARM_LDC_SB_G0, /* type */
1233 2, /* size (0 = byte, 1 = short, 2 = long) */
1235 TRUE, /* pc_relative */
1237 complain_overflow_dont,/* complain_on_overflow */
1238 bfd_elf_generic_reloc, /* special_function */
1239 "R_ARM_LDC_SB_G0", /* name */
1240 FALSE, /* partial_inplace */
1241 0xffffffff, /* src_mask */
1242 0xffffffff, /* dst_mask */
1243 TRUE), /* pcrel_offset */
1245 HOWTO (R_ARM_LDC_SB_G1, /* type */
1247 2, /* size (0 = byte, 1 = short, 2 = long) */
1249 TRUE, /* pc_relative */
1251 complain_overflow_dont,/* complain_on_overflow */
1252 bfd_elf_generic_reloc, /* special_function */
1253 "R_ARM_LDC_SB_G1", /* name */
1254 FALSE, /* partial_inplace */
1255 0xffffffff, /* src_mask */
1256 0xffffffff, /* dst_mask */
1257 TRUE), /* pcrel_offset */
1259 HOWTO (R_ARM_LDC_SB_G2, /* type */
1261 2, /* size (0 = byte, 1 = short, 2 = long) */
1263 TRUE, /* pc_relative */
1265 complain_overflow_dont,/* complain_on_overflow */
1266 bfd_elf_generic_reloc, /* special_function */
1267 "R_ARM_LDC_SB_G2", /* name */
1268 FALSE, /* partial_inplace */
1269 0xffffffff, /* src_mask */
1270 0xffffffff, /* dst_mask */
1271 TRUE), /* pcrel_offset */
1273 /* End of group relocations. */
1275 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1277 2, /* size (0 = byte, 1 = short, 2 = long) */
1279 FALSE, /* pc_relative */
1281 complain_overflow_dont,/* complain_on_overflow */
1282 bfd_elf_generic_reloc, /* special_function */
1283 "R_ARM_MOVW_BREL_NC", /* name */
1284 FALSE, /* partial_inplace */
1285 0x0000ffff, /* src_mask */
1286 0x0000ffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1289 HOWTO (R_ARM_MOVT_BREL, /* type */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1293 FALSE, /* pc_relative */
1295 complain_overflow_bitfield,/* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_ARM_MOVT_BREL", /* name */
1298 FALSE, /* partial_inplace */
1299 0x0000ffff, /* src_mask */
1300 0x0000ffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1303 HOWTO (R_ARM_MOVW_BREL, /* type */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1307 FALSE, /* pc_relative */
1309 complain_overflow_dont,/* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_ARM_MOVW_BREL", /* name */
1312 FALSE, /* partial_inplace */
1313 0x0000ffff, /* src_mask */
1314 0x0000ffff, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1317 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1321 FALSE, /* pc_relative */
1323 complain_overflow_dont,/* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_ARM_THM_MOVW_BREL_NC",/* name */
1326 FALSE, /* partial_inplace */
1327 0x040f70ff, /* src_mask */
1328 0x040f70ff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1331 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1335 FALSE, /* pc_relative */
1337 complain_overflow_bitfield,/* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_ARM_THM_MOVT_BREL", /* name */
1340 FALSE, /* partial_inplace */
1341 0x040f70ff, /* src_mask */
1342 0x040f70ff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1345 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1347 2, /* size (0 = byte, 1 = short, 2 = long) */
1349 FALSE, /* pc_relative */
1351 complain_overflow_dont,/* complain_on_overflow */
1352 bfd_elf_generic_reloc, /* special_function */
1353 "R_ARM_THM_MOVW_BREL", /* name */
1354 FALSE, /* partial_inplace */
1355 0x040f70ff, /* src_mask */
1356 0x040f70ff, /* dst_mask */
1357 FALSE), /* pcrel_offset */
1359 HOWTO (R_ARM_TLS_GOTDESC, /* type */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1363 FALSE, /* pc_relative */
1365 complain_overflow_bitfield,/* complain_on_overflow */
1366 NULL, /* special_function */
1367 "R_ARM_TLS_GOTDESC", /* name */
1368 TRUE, /* partial_inplace */
1369 0xffffffff, /* src_mask */
1370 0xffffffff, /* dst_mask */
1371 FALSE), /* pcrel_offset */
1373 HOWTO (R_ARM_TLS_CALL, /* type */
1375 2, /* size (0 = byte, 1 = short, 2 = long) */
1377 FALSE, /* pc_relative */
1379 complain_overflow_dont,/* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 "R_ARM_TLS_CALL", /* name */
1382 FALSE, /* partial_inplace */
1383 0x00ffffff, /* src_mask */
1384 0x00ffffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1387 HOWTO (R_ARM_TLS_DESCSEQ, /* type */
1389 2, /* size (0 = byte, 1 = short, 2 = long) */
1391 FALSE, /* pc_relative */
1393 complain_overflow_bitfield,/* complain_on_overflow */
1394 bfd_elf_generic_reloc, /* special_function */
1395 "R_ARM_TLS_DESCSEQ", /* name */
1396 FALSE, /* partial_inplace */
1397 0x00000000, /* src_mask */
1398 0x00000000, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1401 HOWTO (R_ARM_THM_TLS_CALL, /* type */
1403 2, /* size (0 = byte, 1 = short, 2 = long) */
1405 FALSE, /* pc_relative */
1407 complain_overflow_dont,/* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1409 "R_ARM_THM_TLS_CALL", /* name */
1410 FALSE, /* partial_inplace */
1411 0x07ff07ff, /* src_mask */
1412 0x07ff07ff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1415 HOWTO (R_ARM_PLT32_ABS, /* type */
1417 2, /* size (0 = byte, 1 = short, 2 = long) */
1419 FALSE, /* pc_relative */
1421 complain_overflow_dont,/* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_ARM_PLT32_ABS", /* name */
1424 FALSE, /* partial_inplace */
1425 0xffffffff, /* src_mask */
1426 0xffffffff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1429 HOWTO (R_ARM_GOT_ABS, /* type */
1431 2, /* size (0 = byte, 1 = short, 2 = long) */
1433 FALSE, /* pc_relative */
1435 complain_overflow_dont,/* complain_on_overflow */
1436 bfd_elf_generic_reloc, /* special_function */
1437 "R_ARM_GOT_ABS", /* name */
1438 FALSE, /* partial_inplace */
1439 0xffffffff, /* src_mask */
1440 0xffffffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1443 HOWTO (R_ARM_GOT_PREL, /* type */
1445 2, /* size (0 = byte, 1 = short, 2 = long) */
1447 TRUE, /* pc_relative */
1449 complain_overflow_dont, /* complain_on_overflow */
1450 bfd_elf_generic_reloc, /* special_function */
1451 "R_ARM_GOT_PREL", /* name */
1452 FALSE, /* partial_inplace */
1453 0xffffffff, /* src_mask */
1454 0xffffffff, /* dst_mask */
1455 TRUE), /* pcrel_offset */
1457 HOWTO (R_ARM_GOT_BREL12, /* type */
1459 2, /* size (0 = byte, 1 = short, 2 = long) */
1461 FALSE, /* pc_relative */
1463 complain_overflow_bitfield,/* complain_on_overflow */
1464 bfd_elf_generic_reloc, /* special_function */
1465 "R_ARM_GOT_BREL12", /* name */
1466 FALSE, /* partial_inplace */
1467 0x00000fff, /* src_mask */
1468 0x00000fff, /* dst_mask */
1469 FALSE), /* pcrel_offset */
1471 HOWTO (R_ARM_GOTOFF12, /* type */
1473 2, /* size (0 = byte, 1 = short, 2 = long) */
1475 FALSE, /* pc_relative */
1477 complain_overflow_bitfield,/* complain_on_overflow */
1478 bfd_elf_generic_reloc, /* special_function */
1479 "R_ARM_GOTOFF12", /* name */
1480 FALSE, /* partial_inplace */
1481 0x00000fff, /* src_mask */
1482 0x00000fff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1485 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1487 /* GNU extension to record C++ vtable member usage */
1488 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1490 2, /* size (0 = byte, 1 = short, 2 = long) */
1492 FALSE, /* pc_relative */
1494 complain_overflow_dont, /* complain_on_overflow */
1495 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1496 "R_ARM_GNU_VTENTRY", /* name */
1497 FALSE, /* partial_inplace */
1500 FALSE), /* pcrel_offset */
1502 /* GNU extension to record C++ vtable hierarchy */
1503 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1505 2, /* size (0 = byte, 1 = short, 2 = long) */
1507 FALSE, /* pc_relative */
1509 complain_overflow_dont, /* complain_on_overflow */
1510 NULL, /* special_function */
1511 "R_ARM_GNU_VTINHERIT", /* name */
1512 FALSE, /* partial_inplace */
1515 FALSE), /* pcrel_offset */
1517 HOWTO (R_ARM_THM_JUMP11, /* type */
1519 1, /* size (0 = byte, 1 = short, 2 = long) */
1521 TRUE, /* pc_relative */
1523 complain_overflow_signed, /* complain_on_overflow */
1524 bfd_elf_generic_reloc, /* special_function */
1525 "R_ARM_THM_JUMP11", /* name */
1526 FALSE, /* partial_inplace */
1527 0x000007ff, /* src_mask */
1528 0x000007ff, /* dst_mask */
1529 TRUE), /* pcrel_offset */
1531 HOWTO (R_ARM_THM_JUMP8, /* type */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1535 TRUE, /* pc_relative */
1537 complain_overflow_signed, /* complain_on_overflow */
1538 bfd_elf_generic_reloc, /* special_function */
1539 "R_ARM_THM_JUMP8", /* name */
1540 FALSE, /* partial_inplace */
1541 0x000000ff, /* src_mask */
1542 0x000000ff, /* dst_mask */
1543 TRUE), /* pcrel_offset */
1545 /* TLS relocations */
1546 HOWTO (R_ARM_TLS_GD32, /* type */
1548 2, /* size (0 = byte, 1 = short, 2 = long) */
1550 FALSE, /* pc_relative */
1552 complain_overflow_bitfield,/* complain_on_overflow */
1553 NULL, /* special_function */
1554 "R_ARM_TLS_GD32", /* name */
1555 TRUE, /* partial_inplace */
1556 0xffffffff, /* src_mask */
1557 0xffffffff, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1560 HOWTO (R_ARM_TLS_LDM32, /* type */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1564 FALSE, /* pc_relative */
1566 complain_overflow_bitfield,/* complain_on_overflow */
1567 bfd_elf_generic_reloc, /* special_function */
1568 "R_ARM_TLS_LDM32", /* name */
1569 TRUE, /* partial_inplace */
1570 0xffffffff, /* src_mask */
1571 0xffffffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1574 HOWTO (R_ARM_TLS_LDO32, /* type */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1578 FALSE, /* pc_relative */
1580 complain_overflow_bitfield,/* complain_on_overflow */
1581 bfd_elf_generic_reloc, /* special_function */
1582 "R_ARM_TLS_LDO32", /* name */
1583 TRUE, /* partial_inplace */
1584 0xffffffff, /* src_mask */
1585 0xffffffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1588 HOWTO (R_ARM_TLS_IE32, /* type */
1590 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 FALSE, /* pc_relative */
1594 complain_overflow_bitfield,/* complain_on_overflow */
1595 NULL, /* special_function */
1596 "R_ARM_TLS_IE32", /* name */
1597 TRUE, /* partial_inplace */
1598 0xffffffff, /* src_mask */
1599 0xffffffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1602 HOWTO (R_ARM_TLS_LE32, /* type */
1604 2, /* size (0 = byte, 1 = short, 2 = long) */
1606 FALSE, /* pc_relative */
1608 complain_overflow_bitfield,/* complain_on_overflow */
1609 NULL, /* special_function */
1610 "R_ARM_TLS_LE32", /* name */
1611 TRUE, /* partial_inplace */
1612 0xffffffff, /* src_mask */
1613 0xffffffff, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1616 HOWTO (R_ARM_TLS_LDO12, /* type */
1618 2, /* size (0 = byte, 1 = short, 2 = long) */
1620 FALSE, /* pc_relative */
1622 complain_overflow_bitfield,/* complain_on_overflow */
1623 bfd_elf_generic_reloc, /* special_function */
1624 "R_ARM_TLS_LDO12", /* name */
1625 FALSE, /* partial_inplace */
1626 0x00000fff, /* src_mask */
1627 0x00000fff, /* dst_mask */
1628 FALSE), /* pcrel_offset */
1630 HOWTO (R_ARM_TLS_LE12, /* type */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1634 FALSE, /* pc_relative */
1636 complain_overflow_bitfield,/* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_ARM_TLS_LE12", /* name */
1639 FALSE, /* partial_inplace */
1640 0x00000fff, /* src_mask */
1641 0x00000fff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1644 HOWTO (R_ARM_TLS_IE12GP, /* type */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 FALSE, /* pc_relative */
1650 complain_overflow_bitfield,/* complain_on_overflow */
1651 bfd_elf_generic_reloc, /* special_function */
1652 "R_ARM_TLS_IE12GP", /* name */
1653 FALSE, /* partial_inplace */
1654 0x00000fff, /* src_mask */
1655 0x00000fff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1658 /* 112-127 private relocations. */
1676 /* R_ARM_ME_TOO, obsolete. */
1679 HOWTO (R_ARM_THM_TLS_DESCSEQ, /* type */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 FALSE, /* pc_relative */
1685 complain_overflow_bitfield,/* complain_on_overflow */
1686 bfd_elf_generic_reloc, /* special_function */
1687 "R_ARM_THM_TLS_DESCSEQ",/* name */
1688 FALSE, /* partial_inplace */
1689 0x00000000, /* src_mask */
1690 0x00000000, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1694 HOWTO (R_ARM_THM_ALU_ABS_G0_NC,/* type. */
1695 0, /* rightshift. */
1696 1, /* size (0 = byte, 1 = short, 2 = long). */
1698 FALSE, /* pc_relative. */
1700 complain_overflow_bitfield,/* complain_on_overflow. */
1701 bfd_elf_generic_reloc, /* special_function. */
1702 "R_ARM_THM_ALU_ABS_G0_NC",/* name. */
1703 FALSE, /* partial_inplace. */
1704 0x00000000, /* src_mask. */
1705 0x00000000, /* dst_mask. */
1706 FALSE), /* pcrel_offset. */
1707 HOWTO (R_ARM_THM_ALU_ABS_G1_NC,/* type. */
1708 0, /* rightshift. */
1709 1, /* size (0 = byte, 1 = short, 2 = long). */
1711 FALSE, /* pc_relative. */
1713 complain_overflow_bitfield,/* complain_on_overflow. */
1714 bfd_elf_generic_reloc, /* special_function. */
1715 "R_ARM_THM_ALU_ABS_G1_NC",/* name. */
1716 FALSE, /* partial_inplace. */
1717 0x00000000, /* src_mask. */
1718 0x00000000, /* dst_mask. */
1719 FALSE), /* pcrel_offset. */
1720 HOWTO (R_ARM_THM_ALU_ABS_G2_NC,/* type. */
1721 0, /* rightshift. */
1722 1, /* size (0 = byte, 1 = short, 2 = long). */
1724 FALSE, /* pc_relative. */
1726 complain_overflow_bitfield,/* complain_on_overflow. */
1727 bfd_elf_generic_reloc, /* special_function. */
1728 "R_ARM_THM_ALU_ABS_G2_NC",/* name. */
1729 FALSE, /* partial_inplace. */
1730 0x00000000, /* src_mask. */
1731 0x00000000, /* dst_mask. */
1732 FALSE), /* pcrel_offset. */
1733 HOWTO (R_ARM_THM_ALU_ABS_G3_NC,/* type. */
1734 0, /* rightshift. */
1735 1, /* size (0 = byte, 1 = short, 2 = long). */
1737 FALSE, /* pc_relative. */
1739 complain_overflow_bitfield,/* complain_on_overflow. */
1740 bfd_elf_generic_reloc, /* special_function. */
1741 "R_ARM_THM_ALU_ABS_G3_NC",/* name. */
1742 FALSE, /* partial_inplace. */
1743 0x00000000, /* src_mask. */
1744 0x00000000, /* dst_mask. */
1745 FALSE), /* pcrel_offset. */
1749 static reloc_howto_type elf32_arm_howto_table_2[1] =
1751 HOWTO (R_ARM_IRELATIVE, /* type */
1753 2, /* size (0 = byte, 1 = short, 2 = long) */
1755 FALSE, /* pc_relative */
1757 complain_overflow_bitfield,/* complain_on_overflow */
1758 bfd_elf_generic_reloc, /* special_function */
1759 "R_ARM_IRELATIVE", /* name */
1760 TRUE, /* partial_inplace */
1761 0xffffffff, /* src_mask */
1762 0xffffffff, /* dst_mask */
1763 FALSE) /* pcrel_offset */
1766 /* 249-255 extended, currently unused, relocations: */
1767 static reloc_howto_type elf32_arm_howto_table_3[4] =
1769 HOWTO (R_ARM_RREL32, /* type */
1771 0, /* size (0 = byte, 1 = short, 2 = long) */
1773 FALSE, /* pc_relative */
1775 complain_overflow_dont,/* complain_on_overflow */
1776 bfd_elf_generic_reloc, /* special_function */
1777 "R_ARM_RREL32", /* name */
1778 FALSE, /* partial_inplace */
1781 FALSE), /* pcrel_offset */
1783 HOWTO (R_ARM_RABS32, /* type */
1785 0, /* size (0 = byte, 1 = short, 2 = long) */
1787 FALSE, /* pc_relative */
1789 complain_overflow_dont,/* complain_on_overflow */
1790 bfd_elf_generic_reloc, /* special_function */
1791 "R_ARM_RABS32", /* name */
1792 FALSE, /* partial_inplace */
1795 FALSE), /* pcrel_offset */
1797 HOWTO (R_ARM_RPC24, /* type */
1799 0, /* size (0 = byte, 1 = short, 2 = long) */
1801 FALSE, /* pc_relative */
1803 complain_overflow_dont,/* complain_on_overflow */
1804 bfd_elf_generic_reloc, /* special_function */
1805 "R_ARM_RPC24", /* name */
1806 FALSE, /* partial_inplace */
1809 FALSE), /* pcrel_offset */
1811 HOWTO (R_ARM_RBASE, /* type */
1813 0, /* size (0 = byte, 1 = short, 2 = long) */
1815 FALSE, /* pc_relative */
1817 complain_overflow_dont,/* complain_on_overflow */
1818 bfd_elf_generic_reloc, /* special_function */
1819 "R_ARM_RBASE", /* name */
1820 FALSE, /* partial_inplace */
1823 FALSE) /* pcrel_offset */
1826 static reloc_howto_type *
1827 elf32_arm_howto_from_type (unsigned int r_type)
1829 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
1830 return &elf32_arm_howto_table_1[r_type];
1832 if (r_type == R_ARM_IRELATIVE)
1833 return &elf32_arm_howto_table_2[r_type - R_ARM_IRELATIVE];
1835 if (r_type >= R_ARM_RREL32
1836 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_3))
1837 return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
1843 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1844 Elf_Internal_Rela * elf_reloc)
1846 unsigned int r_type;
1848 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1849 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1852 struct elf32_arm_reloc_map
1854 bfd_reloc_code_real_type bfd_reloc_val;
1855 unsigned char elf_reloc_val;
1858 /* All entries in this list must also be present in elf32_arm_howto_table. */
1859 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1861 {BFD_RELOC_NONE, R_ARM_NONE},
1862 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1863 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1864 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1865 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1866 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1867 {BFD_RELOC_32, R_ARM_ABS32},
1868 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1869 {BFD_RELOC_8, R_ARM_ABS8},
1870 {BFD_RELOC_16, R_ARM_ABS16},
1871 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1872 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1873 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1874 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1875 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1876 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1877 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1878 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1879 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1880 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1881 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1882 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1883 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1884 {BFD_RELOC_ARM_GOT_PREL, R_ARM_GOT_PREL},
1885 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1886 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1887 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1888 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1889 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1890 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1891 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1892 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1893 {BFD_RELOC_ARM_TLS_GOTDESC, R_ARM_TLS_GOTDESC},
1894 {BFD_RELOC_ARM_TLS_CALL, R_ARM_TLS_CALL},
1895 {BFD_RELOC_ARM_THM_TLS_CALL, R_ARM_THM_TLS_CALL},
1896 {BFD_RELOC_ARM_TLS_DESCSEQ, R_ARM_TLS_DESCSEQ},
1897 {BFD_RELOC_ARM_THM_TLS_DESCSEQ, R_ARM_THM_TLS_DESCSEQ},
1898 {BFD_RELOC_ARM_TLS_DESC, R_ARM_TLS_DESC},
1899 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1900 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1901 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1902 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1903 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1904 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1905 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1906 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1907 {BFD_RELOC_ARM_IRELATIVE, R_ARM_IRELATIVE},
1908 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1909 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1910 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1911 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1912 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1913 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1914 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1915 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1916 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1917 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1918 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1919 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1920 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1921 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1922 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1923 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1924 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1925 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1926 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1927 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1928 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1929 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1930 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1931 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1932 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1933 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1934 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1935 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1936 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1937 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1938 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1939 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1940 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1941 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1942 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1943 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1944 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1945 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1946 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX},
1947 {BFD_RELOC_ARM_THUMB_ALU_ABS_G3_NC, R_ARM_THM_ALU_ABS_G3_NC},
1948 {BFD_RELOC_ARM_THUMB_ALU_ABS_G2_NC, R_ARM_THM_ALU_ABS_G2_NC},
1949 {BFD_RELOC_ARM_THUMB_ALU_ABS_G1_NC, R_ARM_THM_ALU_ABS_G1_NC},
1950 {BFD_RELOC_ARM_THUMB_ALU_ABS_G0_NC, R_ARM_THM_ALU_ABS_G0_NC}
1953 static reloc_howto_type *
1954 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1955 bfd_reloc_code_real_type code)
1959 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
1960 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1961 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1966 static reloc_howto_type *
1967 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1972 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++)
1973 if (elf32_arm_howto_table_1[i].name != NULL
1974 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1975 return &elf32_arm_howto_table_1[i];
1977 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
1978 if (elf32_arm_howto_table_2[i].name != NULL
1979 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1980 return &elf32_arm_howto_table_2[i];
1982 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_3); i++)
1983 if (elf32_arm_howto_table_3[i].name != NULL
1984 && strcasecmp (elf32_arm_howto_table_3[i].name, r_name) == 0)
1985 return &elf32_arm_howto_table_3[i];
1990 /* Support for core dump NOTE sections. */
1993 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1998 switch (note->descsz)
2003 case 148: /* Linux/ARM 32-bit. */
2005 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2008 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2017 /* Make a ".reg/999" section. */
2018 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2019 size, note->descpos + offset);
2023 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2025 switch (note->descsz)
2030 case 124: /* Linux/ARM elf_prpsinfo. */
2031 elf_tdata (abfd)->core->pid
2032 = bfd_get_32 (abfd, note->descdata + 12);
2033 elf_tdata (abfd)->core->program
2034 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
2035 elf_tdata (abfd)->core->command
2036 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
2039 /* Note that for some reason, a spurious space is tacked
2040 onto the end of the args in some (at least one anyway)
2041 implementations, so strip it off if it exists. */
2043 char *command = elf_tdata (abfd)->core->command;
2044 int n = strlen (command);
2046 if (0 < n && command[n - 1] == ' ')
2047 command[n - 1] = '\0';
2054 elf32_arm_nabi_write_core_note (bfd *abfd, char *buf, int *bufsiz,
2067 va_start (ap, note_type);
2068 memset (data, 0, sizeof (data));
2069 strncpy (data + 28, va_arg (ap, const char *), 16);
2070 strncpy (data + 44, va_arg (ap, const char *), 80);
2073 return elfcore_write_note (abfd, buf, bufsiz,
2074 "CORE", note_type, data, sizeof (data));
2085 va_start (ap, note_type);
2086 memset (data, 0, sizeof (data));
2087 pid = va_arg (ap, long);
2088 bfd_put_32 (abfd, pid, data + 24);
2089 cursig = va_arg (ap, int);
2090 bfd_put_16 (abfd, cursig, data + 12);
2091 greg = va_arg (ap, const void *);
2092 memcpy (data + 72, greg, 72);
2095 return elfcore_write_note (abfd, buf, bufsiz,
2096 "CORE", note_type, data, sizeof (data));
2101 #define TARGET_LITTLE_SYM arm_elf32_le_vec
2102 #define TARGET_LITTLE_NAME "elf32-littlearm"
2103 #define TARGET_BIG_SYM arm_elf32_be_vec
2104 #define TARGET_BIG_NAME "elf32-bigarm"
2106 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
2107 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
2108 #define elf_backend_write_core_note elf32_arm_nabi_write_core_note
2110 typedef unsigned long int insn32;
2111 typedef unsigned short int insn16;
2113 /* In lieu of proper flags, assume all EABIv4 or later objects are
2115 #define INTERWORK_FLAG(abfd) \
2116 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
2117 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2118 || ((abfd)->flags & BFD_LINKER_CREATED))
2120 /* The linker script knows the section names for placement.
2121 The entry_names are used to do simple name mangling on the stubs.
2122 Given a function name, and its type, the stub can be found. The
2123 name can be changed. The only requirement is the %s be present. */
2124 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2125 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2127 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2128 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2130 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2131 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2133 #define STM32L4XX_ERRATUM_VENEER_SECTION_NAME ".text.stm32l4xx_veneer"
2134 #define STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "__stm32l4xx_veneer_%x"
2136 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2137 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2139 #define STUB_ENTRY_NAME "__%s_veneer"
2141 #define CMSE_PREFIX "__acle_se_"
2143 /* The name of the dynamic interpreter. This is put in the .interp
2145 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2147 static const unsigned long tls_trampoline [] =
2149 0xe08e0000, /* add r0, lr, r0 */
2150 0xe5901004, /* ldr r1, [r0,#4] */
2151 0xe12fff11, /* bx r1 */
2154 static const unsigned long dl_tlsdesc_lazy_trampoline [] =
2156 0xe52d2004, /* push {r2} */
2157 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2158 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2159 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2160 0xe081100f, /* 2: add r1, pc */
2161 0xe12fff12, /* bx r2 */
2162 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2163 + dl_tlsdesc_lazy_resolver(GOT) */
2164 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2167 #ifdef FOUR_WORD_PLT
2169 /* The first entry in a procedure linkage table looks like
2170 this. It is set up so that any shared library function that is
2171 called before the relocation has been set up calls the dynamic
2173 static const bfd_vma elf32_arm_plt0_entry [] =
2175 0xe52de004, /* str lr, [sp, #-4]! */
2176 0xe59fe010, /* ldr lr, [pc, #16] */
2177 0xe08fe00e, /* add lr, pc, lr */
2178 0xe5bef008, /* ldr pc, [lr, #8]! */
2181 /* Subsequent entries in a procedure linkage table look like
2183 static const bfd_vma elf32_arm_plt_entry [] =
2185 0xe28fc600, /* add ip, pc, #NN */
2186 0xe28cca00, /* add ip, ip, #NN */
2187 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2188 0x00000000, /* unused */
2191 #else /* not FOUR_WORD_PLT */
2193 /* The first entry in a procedure linkage table looks like
2194 this. It is set up so that any shared library function that is
2195 called before the relocation has been set up calls the dynamic
2197 static const bfd_vma elf32_arm_plt0_entry [] =
2199 0xe52de004, /* str lr, [sp, #-4]! */
2200 0xe59fe004, /* ldr lr, [pc, #4] */
2201 0xe08fe00e, /* add lr, pc, lr */
2202 0xe5bef008, /* ldr pc, [lr, #8]! */
2203 0x00000000, /* &GOT[0] - . */
2206 /* By default subsequent entries in a procedure linkage table look like
2207 this. Offsets that don't fit into 28 bits will cause link error. */
2208 static const bfd_vma elf32_arm_plt_entry_short [] =
2210 0xe28fc600, /* add ip, pc, #0xNN00000 */
2211 0xe28cca00, /* add ip, ip, #0xNN000 */
2212 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2215 /* When explicitly asked, we'll use this "long" entry format
2216 which can cope with arbitrary displacements. */
2217 static const bfd_vma elf32_arm_plt_entry_long [] =
2219 0xe28fc200, /* add ip, pc, #0xN0000000 */
2220 0xe28cc600, /* add ip, ip, #0xNN00000 */
2221 0xe28cca00, /* add ip, ip, #0xNN000 */
2222 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2225 static bfd_boolean elf32_arm_use_long_plt_entry = FALSE;
2227 #endif /* not FOUR_WORD_PLT */
2229 /* The first entry in a procedure linkage table looks like this.
2230 It is set up so that any shared library function that is called before the
2231 relocation has been set up calls the dynamic linker first. */
2232 static const bfd_vma elf32_thumb2_plt0_entry [] =
2234 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2235 an instruction maybe encoded to one or two array elements. */
2236 0xf8dfb500, /* push {lr} */
2237 0x44fee008, /* ldr.w lr, [pc, #8] */
2239 0xff08f85e, /* ldr.w pc, [lr, #8]! */
2240 0x00000000, /* &GOT[0] - . */
2243 /* Subsequent entries in a procedure linkage table for thumb only target
2245 static const bfd_vma elf32_thumb2_plt_entry [] =
2247 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2248 an instruction maybe encoded to one or two array elements. */
2249 0x0c00f240, /* movw ip, #0xNNNN */
2250 0x0c00f2c0, /* movt ip, #0xNNNN */
2251 0xf8dc44fc, /* add ip, pc */
2252 0xbf00f000 /* ldr.w pc, [ip] */
2256 /* The format of the first entry in the procedure linkage table
2257 for a VxWorks executable. */
2258 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
2260 0xe52dc008, /* str ip,[sp,#-8]! */
2261 0xe59fc000, /* ldr ip,[pc] */
2262 0xe59cf008, /* ldr pc,[ip,#8] */
2263 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2266 /* The format of subsequent entries in a VxWorks executable. */
2267 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
2269 0xe59fc000, /* ldr ip,[pc] */
2270 0xe59cf000, /* ldr pc,[ip] */
2271 0x00000000, /* .long @got */
2272 0xe59fc000, /* ldr ip,[pc] */
2273 0xea000000, /* b _PLT */
2274 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2277 /* The format of entries in a VxWorks shared library. */
2278 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
2280 0xe59fc000, /* ldr ip,[pc] */
2281 0xe79cf009, /* ldr pc,[ip,r9] */
2282 0x00000000, /* .long @got */
2283 0xe59fc000, /* ldr ip,[pc] */
2284 0xe599f008, /* ldr pc,[r9,#8] */
2285 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2288 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2289 #define PLT_THUMB_STUB_SIZE 4
2290 static const bfd_vma elf32_arm_plt_thumb_stub [] =
2296 /* The entries in a PLT when using a DLL-based target with multiple
2298 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2300 0xe51ff004, /* ldr pc, [pc, #-4] */
2301 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2304 /* The first entry in a procedure linkage table looks like
2305 this. It is set up so that any shared library function that is
2306 called before the relocation has been set up calls the dynamic
2308 static const bfd_vma elf32_arm_nacl_plt0_entry [] =
2311 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2312 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2313 0xe08cc00f, /* add ip, ip, pc */
2314 0xe52dc008, /* str ip, [sp, #-8]! */
2315 /* Second bundle: */
2316 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2317 0xe59cc000, /* ldr ip, [ip] */
2318 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2319 0xe12fff1c, /* bx ip */
2321 0xe320f000, /* nop */
2322 0xe320f000, /* nop */
2323 0xe320f000, /* nop */
2325 0xe50dc004, /* str ip, [sp, #-4] */
2326 /* Fourth bundle: */
2327 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2328 0xe59cc000, /* ldr ip, [ip] */
2329 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2330 0xe12fff1c, /* bx ip */
2332 #define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2334 /* Subsequent entries in a procedure linkage table look like this. */
2335 static const bfd_vma elf32_arm_nacl_plt_entry [] =
2337 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2338 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2339 0xe08cc00f, /* add ip, ip, pc */
2340 0xea000000, /* b .Lplt_tail */
2343 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2344 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2345 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2346 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2347 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2348 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2349 #define THM2_MAX_FWD_COND_BRANCH_OFFSET (((1 << 20) -2) + 4)
2350 #define THM2_MAX_BWD_COND_BRANCH_OFFSET (-(1 << 20) + 4)
2360 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2361 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2362 is inserted in arm_build_one_stub(). */
2363 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2364 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2365 #define THUMB32_MOVT(X) {(X), THUMB32_TYPE, R_ARM_THM_MOVT_ABS, 0}
2366 #define THUMB32_MOVW(X) {(X), THUMB32_TYPE, R_ARM_THM_MOVW_ABS_NC, 0}
2367 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2368 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2369 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2370 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2375 enum stub_insn_type type;
2376 unsigned int r_type;
2380 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2381 to reach the stub if necessary. */
2382 static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
2384 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2385 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2388 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2390 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] =
2392 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2393 ARM_INSN (0xe12fff1c), /* bx ip */
2394 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2397 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2398 static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
2400 THUMB16_INSN (0xb401), /* push {r0} */
2401 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2402 THUMB16_INSN (0x4684), /* mov ip, r0 */
2403 THUMB16_INSN (0xbc01), /* pop {r0} */
2404 THUMB16_INSN (0x4760), /* bx ip */
2405 THUMB16_INSN (0xbf00), /* nop */
2406 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2409 /* Thumb -> Thumb long branch stub in thumb2 encoding. Used on armv7. */
2410 static const insn_sequence elf32_arm_stub_long_branch_thumb2_only[] =
2412 THUMB32_INSN (0xf85ff000), /* ldr.w pc, [pc, #-0] */
2413 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(x) */
2416 /* Thumb -> Thumb long branch stub. Used for PureCode sections on Thumb2
2417 M-profile architectures. */
2418 static const insn_sequence elf32_arm_stub_long_branch_thumb2_only_pure[] =
2420 THUMB32_MOVW (0xf2400c00), /* mov.w ip, R_ARM_MOVW_ABS_NC */
2421 THUMB32_MOVT (0xf2c00c00), /* movt ip, R_ARM_MOVT_ABS << 16 */
2422 THUMB16_INSN (0x4760), /* bx ip */
2425 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2427 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
2429 THUMB16_INSN (0x4778), /* bx pc */
2430 THUMB16_INSN (0x46c0), /* nop */
2431 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2432 ARM_INSN (0xe12fff1c), /* bx ip */
2433 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2436 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2438 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
2440 THUMB16_INSN (0x4778), /* bx pc */
2441 THUMB16_INSN (0x46c0), /* nop */
2442 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2443 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2446 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2447 one, when the destination is close enough. */
2448 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
2450 THUMB16_INSN (0x4778), /* bx pc */
2451 THUMB16_INSN (0x46c0), /* nop */
2452 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2455 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2456 blx to reach the stub if necessary. */
2457 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] =
2459 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2460 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
2461 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2464 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2465 blx to reach the stub if necessary. We can not add into pc;
2466 it is not guaranteed to mode switch (different in ARMv6 and
2468 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] =
2470 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2471 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2472 ARM_INSN (0xe12fff1c), /* bx ip */
2473 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2476 /* V4T ARM -> ARM long branch stub, PIC. */
2477 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
2479 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2480 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2481 ARM_INSN (0xe12fff1c), /* bx ip */
2482 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2485 /* V4T Thumb -> ARM long branch stub, PIC. */
2486 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
2488 THUMB16_INSN (0x4778), /* bx pc */
2489 THUMB16_INSN (0x46c0), /* nop */
2490 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2491 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
2492 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2495 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2497 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
2499 THUMB16_INSN (0xb401), /* push {r0} */
2500 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2501 THUMB16_INSN (0x46fc), /* mov ip, pc */
2502 THUMB16_INSN (0x4484), /* add ip, r0 */
2503 THUMB16_INSN (0xbc01), /* pop {r0} */
2504 THUMB16_INSN (0x4760), /* bx ip */
2505 DATA_WORD (0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */
2508 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2510 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
2512 THUMB16_INSN (0x4778), /* bx pc */
2513 THUMB16_INSN (0x46c0), /* nop */
2514 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2515 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2516 ARM_INSN (0xe12fff1c), /* bx ip */
2517 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2520 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2521 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2522 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
2524 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2525 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
2526 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2529 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2530 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2531 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
2533 THUMB16_INSN (0x4778), /* bx pc */
2534 THUMB16_INSN (0x46c0), /* nop */
2535 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2536 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
2537 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2540 /* NaCl ARM -> ARM long branch stub. */
2541 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl[] =
2543 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2544 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2545 ARM_INSN (0xe12fff1c), /* bx ip */
2546 ARM_INSN (0xe320f000), /* nop */
2547 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2548 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2549 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2550 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2553 /* NaCl ARM -> ARM long branch stub, PIC. */
2554 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl_pic[] =
2556 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2557 ARM_INSN (0xe08cc00f), /* add ip, ip, pc */
2558 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2559 ARM_INSN (0xe12fff1c), /* bx ip */
2560 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2561 DATA_WORD (0, R_ARM_REL32, 8), /* dcd R_ARM_REL32(X+8) */
2562 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2563 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2566 /* Stub used for transition to secure state (aka SG veneer). */
2567 static const insn_sequence elf32_arm_stub_cmse_branch_thumb_only[] =
2569 THUMB32_INSN (0xe97fe97f), /* sg. */
2570 THUMB32_B_INSN (0xf000b800, -4), /* b.w original_branch_dest. */
2574 /* Cortex-A8 erratum-workaround stubs. */
2576 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2577 can't use a conditional branch to reach this stub). */
2579 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond[] =
2581 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
2582 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2583 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2586 /* Stub used for b.w and bl.w instructions. */
2588 static const insn_sequence elf32_arm_stub_a8_veneer_b[] =
2590 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2593 static const insn_sequence elf32_arm_stub_a8_veneer_bl[] =
2595 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2598 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2599 instruction (which switches to ARM mode) to point to this stub. Jump to the
2600 real destination using an ARM-mode branch. */
2602 static const insn_sequence elf32_arm_stub_a8_veneer_blx[] =
2604 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2607 /* For each section group there can be a specially created linker section
2608 to hold the stubs for that group. The name of the stub section is based
2609 upon the name of another section within that group with the suffix below
2612 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2613 create what appeared to be a linker stub section when it actually
2614 contained user code/data. For example, consider this fragment:
2616 const char * stubborn_problems[] = { "np" };
2618 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2621 .data.rel.local.stubborn_problems
2623 This then causes problems in arm32_arm_build_stubs() as it triggers:
2625 // Ignore non-stub sections.
2626 if (!strstr (stub_sec->name, STUB_SUFFIX))
2629 And so the section would be ignored instead of being processed. Hence
2630 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2632 #define STUB_SUFFIX ".__stub"
2634 /* One entry per long/short branch stub defined above. */
2636 DEF_STUB(long_branch_any_any) \
2637 DEF_STUB(long_branch_v4t_arm_thumb) \
2638 DEF_STUB(long_branch_thumb_only) \
2639 DEF_STUB(long_branch_v4t_thumb_thumb) \
2640 DEF_STUB(long_branch_v4t_thumb_arm) \
2641 DEF_STUB(short_branch_v4t_thumb_arm) \
2642 DEF_STUB(long_branch_any_arm_pic) \
2643 DEF_STUB(long_branch_any_thumb_pic) \
2644 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2645 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2646 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2647 DEF_STUB(long_branch_thumb_only_pic) \
2648 DEF_STUB(long_branch_any_tls_pic) \
2649 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2650 DEF_STUB(long_branch_arm_nacl) \
2651 DEF_STUB(long_branch_arm_nacl_pic) \
2652 DEF_STUB(cmse_branch_thumb_only) \
2653 DEF_STUB(a8_veneer_b_cond) \
2654 DEF_STUB(a8_veneer_b) \
2655 DEF_STUB(a8_veneer_bl) \
2656 DEF_STUB(a8_veneer_blx) \
2657 DEF_STUB(long_branch_thumb2_only) \
2658 DEF_STUB(long_branch_thumb2_only_pure)
2660 #define DEF_STUB(x) arm_stub_##x,
2661 enum elf32_arm_stub_type
2669 /* Note the first a8_veneer type. */
2670 const unsigned arm_stub_a8_veneer_lwm = arm_stub_a8_veneer_b_cond;
2674 const insn_sequence* template_sequence;
2678 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2679 static const stub_def stub_definitions[] =
2685 struct elf32_arm_stub_hash_entry
2687 /* Base hash table entry structure. */
2688 struct bfd_hash_entry root;
2690 /* The stub section. */
2693 /* Offset within stub_sec of the beginning of this stub. */
2694 bfd_vma stub_offset;
2696 /* Given the symbol's value and its section we can determine its final
2697 value when building the stubs (so the stub knows where to jump). */
2698 bfd_vma target_value;
2699 asection *target_section;
2701 /* Same as above but for the source of the branch to the stub. Used for
2702 Cortex-A8 erratum workaround to patch it to branch to the stub. As
2703 such, source section does not need to be recorded since Cortex-A8 erratum
2704 workaround stubs are only generated when both source and target are in the
2706 bfd_vma source_value;
2708 /* The instruction which caused this stub to be generated (only valid for
2709 Cortex-A8 erratum workaround stubs at present). */
2710 unsigned long orig_insn;
2712 /* The stub type. */
2713 enum elf32_arm_stub_type stub_type;
2714 /* Its encoding size in bytes. */
2717 const insn_sequence *stub_template;
2718 /* The size of the template (number of entries). */
2719 int stub_template_size;
2721 /* The symbol table entry, if any, that this was derived from. */
2722 struct elf32_arm_link_hash_entry *h;
2724 /* Type of branch. */
2725 enum arm_st_branch_type branch_type;
2727 /* Where this stub is being called from, or, in the case of combined
2728 stub sections, the first input section in the group. */
2731 /* The name for the local symbol at the start of this stub. The
2732 stub name in the hash table has to be unique; this does not, so
2733 it can be friendlier. */
2737 /* Used to build a map of a section. This is required for mixed-endian
2740 typedef struct elf32_elf_section_map
2745 elf32_arm_section_map;
2747 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2751 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2752 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2753 VFP11_ERRATUM_ARM_VENEER,
2754 VFP11_ERRATUM_THUMB_VENEER
2756 elf32_vfp11_erratum_type;
2758 typedef struct elf32_vfp11_erratum_list
2760 struct elf32_vfp11_erratum_list *next;
2766 struct elf32_vfp11_erratum_list *veneer;
2767 unsigned int vfp_insn;
2771 struct elf32_vfp11_erratum_list *branch;
2775 elf32_vfp11_erratum_type type;
2777 elf32_vfp11_erratum_list;
2779 /* Information about a STM32L4XX erratum veneer, or a branch to such a
2783 STM32L4XX_ERRATUM_BRANCH_TO_VENEER,
2784 STM32L4XX_ERRATUM_VENEER
2786 elf32_stm32l4xx_erratum_type;
2788 typedef struct elf32_stm32l4xx_erratum_list
2790 struct elf32_stm32l4xx_erratum_list *next;
2796 struct elf32_stm32l4xx_erratum_list *veneer;
2801 struct elf32_stm32l4xx_erratum_list *branch;
2805 elf32_stm32l4xx_erratum_type type;
2807 elf32_stm32l4xx_erratum_list;
2812 INSERT_EXIDX_CANTUNWIND_AT_END
2814 arm_unwind_edit_type;
2816 /* A (sorted) list of edits to apply to an unwind table. */
2817 typedef struct arm_unwind_table_edit
2819 arm_unwind_edit_type type;
2820 /* Note: we sometimes want to insert an unwind entry corresponding to a
2821 section different from the one we're currently writing out, so record the
2822 (text) section this edit relates to here. */
2823 asection *linked_section;
2825 struct arm_unwind_table_edit *next;
2827 arm_unwind_table_edit;
2829 typedef struct _arm_elf_section_data
2831 /* Information about mapping symbols. */
2832 struct bfd_elf_section_data elf;
2833 unsigned int mapcount;
2834 unsigned int mapsize;
2835 elf32_arm_section_map *map;
2836 /* Information about CPU errata. */
2837 unsigned int erratumcount;
2838 elf32_vfp11_erratum_list *erratumlist;
2839 unsigned int stm32l4xx_erratumcount;
2840 elf32_stm32l4xx_erratum_list *stm32l4xx_erratumlist;
2841 unsigned int additional_reloc_count;
2842 /* Information about unwind tables. */
2845 /* Unwind info attached to a text section. */
2848 asection *arm_exidx_sec;
2851 /* Unwind info attached to an .ARM.exidx section. */
2854 arm_unwind_table_edit *unwind_edit_list;
2855 arm_unwind_table_edit *unwind_edit_tail;
2859 _arm_elf_section_data;
2861 #define elf32_arm_section_data(sec) \
2862 ((_arm_elf_section_data *) elf_section_data (sec))
2864 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2865 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2866 so may be created multiple times: we use an array of these entries whilst
2867 relaxing which we can refresh easily, then create stubs for each potentially
2868 erratum-triggering instruction once we've settled on a solution. */
2870 struct a8_erratum_fix
2875 bfd_vma target_offset;
2876 unsigned long orig_insn;
2878 enum elf32_arm_stub_type stub_type;
2879 enum arm_st_branch_type branch_type;
2882 /* A table of relocs applied to branches which might trigger Cortex-A8
2885 struct a8_erratum_reloc
2888 bfd_vma destination;
2889 struct elf32_arm_link_hash_entry *hash;
2890 const char *sym_name;
2891 unsigned int r_type;
2892 enum arm_st_branch_type branch_type;
2893 bfd_boolean non_a8_stub;
2896 /* The size of the thread control block. */
2899 /* ARM-specific information about a PLT entry, over and above the usual
2903 /* We reference count Thumb references to a PLT entry separately,
2904 so that we can emit the Thumb trampoline only if needed. */
2905 bfd_signed_vma thumb_refcount;
2907 /* Some references from Thumb code may be eliminated by BL->BLX
2908 conversion, so record them separately. */
2909 bfd_signed_vma maybe_thumb_refcount;
2911 /* How many of the recorded PLT accesses were from non-call relocations.
2912 This information is useful when deciding whether anything takes the
2913 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2914 non-call references to the function should resolve directly to the
2915 real runtime target. */
2916 unsigned int noncall_refcount;
2918 /* Since PLT entries have variable size if the Thumb prologue is
2919 used, we need to record the index into .got.plt instead of
2920 recomputing it from the PLT offset. */
2921 bfd_signed_vma got_offset;
2924 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2925 struct arm_local_iplt_info
2927 /* The information that is usually found in the generic ELF part of
2928 the hash table entry. */
2929 union gotplt_union root;
2931 /* The information that is usually found in the ARM-specific part of
2932 the hash table entry. */
2933 struct arm_plt_info arm;
2935 /* A list of all potential dynamic relocations against this symbol. */
2936 struct elf_dyn_relocs *dyn_relocs;
2939 struct elf_arm_obj_tdata
2941 struct elf_obj_tdata root;
2943 /* tls_type for each local got entry. */
2944 char *local_got_tls_type;
2946 /* GOTPLT entries for TLS descriptors. */
2947 bfd_vma *local_tlsdesc_gotent;
2949 /* Information for local symbols that need entries in .iplt. */
2950 struct arm_local_iplt_info **local_iplt;
2952 /* Zero to warn when linking objects with incompatible enum sizes. */
2953 int no_enum_size_warning;
2955 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2956 int no_wchar_size_warning;
2959 #define elf_arm_tdata(bfd) \
2960 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2962 #define elf32_arm_local_got_tls_type(bfd) \
2963 (elf_arm_tdata (bfd)->local_got_tls_type)
2965 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2966 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2968 #define elf32_arm_local_iplt(bfd) \
2969 (elf_arm_tdata (bfd)->local_iplt)
2971 #define is_arm_elf(bfd) \
2972 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2973 && elf_tdata (bfd) != NULL \
2974 && elf_object_id (bfd) == ARM_ELF_DATA)
2977 elf32_arm_mkobject (bfd *abfd)
2979 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2983 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2985 /* Arm ELF linker hash entry. */
2986 struct elf32_arm_link_hash_entry
2988 struct elf_link_hash_entry root;
2990 /* Track dynamic relocs copied for this symbol. */
2991 struct elf_dyn_relocs *dyn_relocs;
2993 /* ARM-specific PLT information. */
2994 struct arm_plt_info plt;
2996 #define GOT_UNKNOWN 0
2997 #define GOT_NORMAL 1
2998 #define GOT_TLS_GD 2
2999 #define GOT_TLS_IE 4
3000 #define GOT_TLS_GDESC 8
3001 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
3002 unsigned int tls_type : 8;
3004 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
3005 unsigned int is_iplt : 1;
3007 unsigned int unused : 23;
3009 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
3010 starting at the end of the jump table. */
3011 bfd_vma tlsdesc_got;
3013 /* The symbol marking the real symbol location for exported thumb
3014 symbols with Arm stubs. */
3015 struct elf_link_hash_entry *export_glue;
3017 /* A pointer to the most recently used stub hash entry against this
3019 struct elf32_arm_stub_hash_entry *stub_cache;
3022 /* Traverse an arm ELF linker hash table. */
3023 #define elf32_arm_link_hash_traverse(table, func, info) \
3024 (elf_link_hash_traverse \
3026 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
3029 /* Get the ARM elf linker hash table from a link_info structure. */
3030 #define elf32_arm_hash_table(info) \
3031 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
3032 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
3034 #define arm_stub_hash_lookup(table, string, create, copy) \
3035 ((struct elf32_arm_stub_hash_entry *) \
3036 bfd_hash_lookup ((table), (string), (create), (copy)))
3038 /* Array to keep track of which stub sections have been created, and
3039 information on stub grouping. */
3042 /* This is the section to which stubs in the group will be
3045 /* The stub section. */
3049 #define elf32_arm_compute_jump_table_size(htab) \
3050 ((htab)->next_tls_desc_index * 4)
3052 /* ARM ELF linker hash table. */
3053 struct elf32_arm_link_hash_table
3055 /* The main hash table. */
3056 struct elf_link_hash_table root;
3058 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
3059 bfd_size_type thumb_glue_size;
3061 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
3062 bfd_size_type arm_glue_size;
3064 /* The size in bytes of section containing the ARMv4 BX veneers. */
3065 bfd_size_type bx_glue_size;
3067 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
3068 veneer has been populated. */
3069 bfd_vma bx_glue_offset[15];
3071 /* The size in bytes of the section containing glue for VFP11 erratum
3073 bfd_size_type vfp11_erratum_glue_size;
3075 /* The size in bytes of the section containing glue for STM32L4XX erratum
3077 bfd_size_type stm32l4xx_erratum_glue_size;
3079 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
3080 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
3081 elf32_arm_write_section(). */
3082 struct a8_erratum_fix *a8_erratum_fixes;
3083 unsigned int num_a8_erratum_fixes;
3085 /* An arbitrary input BFD chosen to hold the glue sections. */
3086 bfd * bfd_of_glue_owner;
3088 /* Nonzero to output a BE8 image. */
3091 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
3092 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
3095 /* The relocation to use for R_ARM_TARGET2 relocations. */
3098 /* 0 = Ignore R_ARM_V4BX.
3099 1 = Convert BX to MOV PC.
3100 2 = Generate v4 interworing stubs. */
3103 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
3106 /* Whether we should fix the ARM1176 BLX immediate issue. */
3109 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
3112 /* What sort of code sequences we should look for which may trigger the
3113 VFP11 denorm erratum. */
3114 bfd_arm_vfp11_fix vfp11_fix;
3116 /* Global counter for the number of fixes we have emitted. */
3117 int num_vfp11_fixes;
3119 /* What sort of code sequences we should look for which may trigger the
3120 STM32L4XX erratum. */
3121 bfd_arm_stm32l4xx_fix stm32l4xx_fix;
3123 /* Global counter for the number of fixes we have emitted. */
3124 int num_stm32l4xx_fixes;
3126 /* Nonzero to force PIC branch veneers. */
3129 /* The number of bytes in the initial entry in the PLT. */
3130 bfd_size_type plt_header_size;
3132 /* The number of bytes in the subsequent PLT etries. */
3133 bfd_size_type plt_entry_size;
3135 /* True if the target system is VxWorks. */
3138 /* True if the target system is Symbian OS. */
3141 /* True if the target system is Native Client. */
3144 /* True if the target uses REL relocations. */
3147 /* Nonzero if import library must be a secure gateway import library
3148 as per ARMv8-M Security Extensions. */
3151 /* The import library whose symbols' address must remain stable in
3152 the import library generated. */
3155 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
3156 bfd_vma next_tls_desc_index;
3158 /* How many R_ARM_TLS_DESC relocations were generated so far. */
3159 bfd_vma num_tls_desc;
3161 /* Short-cuts to get to dynamic linker sections. */
3165 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
3168 /* The offset into splt of the PLT entry for the TLS descriptor
3169 resolver. Special values are 0, if not necessary (or not found
3170 to be necessary yet), and -1 if needed but not determined
3172 bfd_vma dt_tlsdesc_plt;
3174 /* The offset into sgot of the GOT entry used by the PLT entry
3176 bfd_vma dt_tlsdesc_got;
3178 /* Offset in .plt section of tls_arm_trampoline. */
3179 bfd_vma tls_trampoline;
3181 /* Data for R_ARM_TLS_LDM32 relocations. */
3184 bfd_signed_vma refcount;
3188 /* Small local sym cache. */
3189 struct sym_cache sym_cache;
3191 /* For convenience in allocate_dynrelocs. */
3194 /* The amount of space used by the reserved portion of the sgotplt
3195 section, plus whatever space is used by the jump slots. */
3196 bfd_vma sgotplt_jump_table_size;
3198 /* The stub hash table. */
3199 struct bfd_hash_table stub_hash_table;
3201 /* Linker stub bfd. */
3204 /* Linker call-backs. */
3205 asection * (*add_stub_section) (const char *, asection *, asection *,
3207 void (*layout_sections_again) (void);
3209 /* Array to keep track of which stub sections have been created, and
3210 information on stub grouping. */
3211 struct map_stub *stub_group;
3213 /* Input stub section holding secure gateway veneers. */
3214 asection *cmse_stub_sec;
3216 /* Offset in cmse_stub_sec where new SG veneers (not in input import library)
3217 start to be allocated. */
3218 bfd_vma new_cmse_stub_offset;
3220 /* Number of elements in stub_group. */
3221 unsigned int top_id;
3223 /* Assorted information used by elf32_arm_size_stubs. */
3224 unsigned int bfd_count;
3225 unsigned int top_index;
3226 asection **input_list;
3230 ctz (unsigned int mask)
3232 #if GCC_VERSION >= 3004
3233 return __builtin_ctz (mask);
3237 for (i = 0; i < 8 * sizeof (mask); i++)
3248 popcount (unsigned int mask)
3250 #if GCC_VERSION >= 3004
3251 return __builtin_popcount (mask);
3253 unsigned int i, sum = 0;
3255 for (i = 0; i < 8 * sizeof (mask); i++)
3265 /* Create an entry in an ARM ELF linker hash table. */
3267 static struct bfd_hash_entry *
3268 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
3269 struct bfd_hash_table * table,
3270 const char * string)
3272 struct elf32_arm_link_hash_entry * ret =
3273 (struct elf32_arm_link_hash_entry *) entry;
3275 /* Allocate the structure if it has not already been allocated by a
3278 ret = (struct elf32_arm_link_hash_entry *)
3279 bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
3281 return (struct bfd_hash_entry *) ret;
3283 /* Call the allocation method of the superclass. */
3284 ret = ((struct elf32_arm_link_hash_entry *)
3285 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3289 ret->dyn_relocs = NULL;
3290 ret->tls_type = GOT_UNKNOWN;
3291 ret->tlsdesc_got = (bfd_vma) -1;
3292 ret->plt.thumb_refcount = 0;
3293 ret->plt.maybe_thumb_refcount = 0;
3294 ret->plt.noncall_refcount = 0;
3295 ret->plt.got_offset = -1;
3296 ret->is_iplt = FALSE;
3297 ret->export_glue = NULL;
3299 ret->stub_cache = NULL;
3302 return (struct bfd_hash_entry *) ret;
3305 /* Ensure that we have allocated bookkeeping structures for ABFD's local
3309 elf32_arm_allocate_local_sym_info (bfd *abfd)
3311 if (elf_local_got_refcounts (abfd) == NULL)
3313 bfd_size_type num_syms;
3317 num_syms = elf_tdata (abfd)->symtab_hdr.sh_info;
3318 size = num_syms * (sizeof (bfd_signed_vma)
3319 + sizeof (struct arm_local_iplt_info *)
3322 data = bfd_zalloc (abfd, size);
3326 elf_local_got_refcounts (abfd) = (bfd_signed_vma *) data;
3327 data += num_syms * sizeof (bfd_signed_vma);
3329 elf32_arm_local_iplt (abfd) = (struct arm_local_iplt_info **) data;
3330 data += num_syms * sizeof (struct arm_local_iplt_info *);
3332 elf32_arm_local_tlsdesc_gotent (abfd) = (bfd_vma *) data;
3333 data += num_syms * sizeof (bfd_vma);
3335 elf32_arm_local_got_tls_type (abfd) = data;
3340 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
3341 to input bfd ABFD. Create the information if it doesn't already exist.
3342 Return null if an allocation fails. */
3344 static struct arm_local_iplt_info *
3345 elf32_arm_create_local_iplt (bfd *abfd, unsigned long r_symndx)
3347 struct arm_local_iplt_info **ptr;
3349 if (!elf32_arm_allocate_local_sym_info (abfd))
3352 BFD_ASSERT (r_symndx < elf_tdata (abfd)->symtab_hdr.sh_info);
3353 ptr = &elf32_arm_local_iplt (abfd)[r_symndx];
3355 *ptr = bfd_zalloc (abfd, sizeof (**ptr));
3359 /* Try to obtain PLT information for the symbol with index R_SYMNDX
3360 in ABFD's symbol table. If the symbol is global, H points to its
3361 hash table entry, otherwise H is null.
3363 Return true if the symbol does have PLT information. When returning
3364 true, point *ROOT_PLT at the target-independent reference count/offset
3365 union and *ARM_PLT at the ARM-specific information. */
3368 elf32_arm_get_plt_info (bfd *abfd, struct elf32_arm_link_hash_table *globals,
3369 struct elf32_arm_link_hash_entry *h,
3370 unsigned long r_symndx, union gotplt_union **root_plt,
3371 struct arm_plt_info **arm_plt)
3373 struct arm_local_iplt_info *local_iplt;
3375 if (globals->root.splt == NULL && globals->root.iplt == NULL)
3380 *root_plt = &h->root.plt;
3385 if (elf32_arm_local_iplt (abfd) == NULL)
3388 local_iplt = elf32_arm_local_iplt (abfd)[r_symndx];
3389 if (local_iplt == NULL)
3392 *root_plt = &local_iplt->root;
3393 *arm_plt = &local_iplt->arm;
3397 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3401 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info *info,
3402 struct arm_plt_info *arm_plt)
3404 struct elf32_arm_link_hash_table *htab;
3406 htab = elf32_arm_hash_table (info);
3407 return (arm_plt->thumb_refcount != 0
3408 || (!htab->use_blx && arm_plt->maybe_thumb_refcount != 0));
3411 /* Return a pointer to the head of the dynamic reloc list that should
3412 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3413 ABFD's symbol table. Return null if an error occurs. */
3415 static struct elf_dyn_relocs **
3416 elf32_arm_get_local_dynreloc_list (bfd *abfd, unsigned long r_symndx,
3417 Elf_Internal_Sym *isym)
3419 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3421 struct arm_local_iplt_info *local_iplt;
3423 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
3424 if (local_iplt == NULL)
3426 return &local_iplt->dyn_relocs;
3430 /* Track dynamic relocs needed for local syms too.
3431 We really need local syms available to do this
3436 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3440 vpp = &elf_section_data (s)->local_dynrel;
3441 return (struct elf_dyn_relocs **) vpp;
3445 /* Initialize an entry in the stub hash table. */
3447 static struct bfd_hash_entry *
3448 stub_hash_newfunc (struct bfd_hash_entry *entry,
3449 struct bfd_hash_table *table,
3452 /* Allocate the structure if it has not already been allocated by a
3456 entry = (struct bfd_hash_entry *)
3457 bfd_hash_allocate (table, sizeof (struct elf32_arm_stub_hash_entry));
3462 /* Call the allocation method of the superclass. */
3463 entry = bfd_hash_newfunc (entry, table, string);
3466 struct elf32_arm_stub_hash_entry *eh;
3468 /* Initialize the local fields. */
3469 eh = (struct elf32_arm_stub_hash_entry *) entry;
3470 eh->stub_sec = NULL;
3471 eh->stub_offset = (bfd_vma) -1;
3472 eh->source_value = 0;
3473 eh->target_value = 0;
3474 eh->target_section = NULL;
3476 eh->stub_type = arm_stub_none;
3478 eh->stub_template = NULL;
3479 eh->stub_template_size = -1;
3482 eh->output_name = NULL;
3488 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3489 shortcuts to them in our hash table. */
3492 create_got_section (bfd *dynobj, struct bfd_link_info *info)
3494 struct elf32_arm_link_hash_table *htab;
3496 htab = elf32_arm_hash_table (info);
3500 /* BPABI objects never have a GOT, or associated sections. */
3501 if (htab->symbian_p)
3504 if (! _bfd_elf_create_got_section (dynobj, info))
3510 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3513 create_ifunc_sections (struct bfd_link_info *info)
3515 struct elf32_arm_link_hash_table *htab;
3516 const struct elf_backend_data *bed;
3521 htab = elf32_arm_hash_table (info);
3522 dynobj = htab->root.dynobj;
3523 bed = get_elf_backend_data (dynobj);
3524 flags = bed->dynamic_sec_flags;
3526 if (htab->root.iplt == NULL)
3528 s = bfd_make_section_anyway_with_flags (dynobj, ".iplt",
3529 flags | SEC_READONLY | SEC_CODE);
3531 || !bfd_set_section_alignment (dynobj, s, bed->plt_alignment))
3533 htab->root.iplt = s;
3536 if (htab->root.irelplt == NULL)
3538 s = bfd_make_section_anyway_with_flags (dynobj,
3539 RELOC_SECTION (htab, ".iplt"),
3540 flags | SEC_READONLY);
3542 || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
3544 htab->root.irelplt = s;
3547 if (htab->root.igotplt == NULL)
3549 s = bfd_make_section_anyway_with_flags (dynobj, ".igot.plt", flags);
3551 || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
3553 htab->root.igotplt = s;
3558 /* Determine if we're dealing with a Thumb only architecture. */
3561 using_thumb_only (struct elf32_arm_link_hash_table *globals)
3564 int profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3565 Tag_CPU_arch_profile);
3568 return profile == 'M';
3570 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3572 /* Force return logic to be reviewed for each new architecture. */
3573 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3574 || arch == TAG_CPU_ARCH_V8M_BASE
3575 || arch == TAG_CPU_ARCH_V8M_MAIN);
3577 if (arch == TAG_CPU_ARCH_V6_M
3578 || arch == TAG_CPU_ARCH_V6S_M
3579 || arch == TAG_CPU_ARCH_V7E_M
3580 || arch == TAG_CPU_ARCH_V8M_BASE
3581 || arch == TAG_CPU_ARCH_V8M_MAIN)
3587 /* Determine if we're dealing with a Thumb-2 object. */
3590 using_thumb2 (struct elf32_arm_link_hash_table *globals)
3593 int thumb_isa = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3597 return thumb_isa == 2;
3599 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3601 /* Force return logic to be reviewed for each new architecture. */
3602 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3603 || arch == TAG_CPU_ARCH_V8M_BASE
3604 || arch == TAG_CPU_ARCH_V8M_MAIN);
3606 return (arch == TAG_CPU_ARCH_V6T2
3607 || arch == TAG_CPU_ARCH_V7
3608 || arch == TAG_CPU_ARCH_V7E_M
3609 || arch == TAG_CPU_ARCH_V8
3610 || arch == TAG_CPU_ARCH_V8M_MAIN);
3613 /* Determine whether Thumb-2 BL instruction is available. */
3616 using_thumb2_bl (struct elf32_arm_link_hash_table *globals)
3619 bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3621 /* Force return logic to be reviewed for each new architecture. */
3622 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3623 || arch == TAG_CPU_ARCH_V8M_BASE
3624 || arch == TAG_CPU_ARCH_V8M_MAIN);
3626 /* Architecture was introduced after ARMv6T2 (eg. ARMv6-M). */
3627 return (arch == TAG_CPU_ARCH_V6T2
3628 || arch >= TAG_CPU_ARCH_V7);
3631 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3632 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3636 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3638 struct elf32_arm_link_hash_table *htab;
3640 htab = elf32_arm_hash_table (info);
3644 if (!htab->root.sgot && !create_got_section (dynobj, info))
3647 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3650 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
3651 if (!bfd_link_pic (info))
3652 htab->srelbss = bfd_get_linker_section (dynobj,
3653 RELOC_SECTION (htab, ".bss"));
3655 if (htab->vxworks_p)
3657 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
3660 if (bfd_link_pic (info))
3662 htab->plt_header_size = 0;
3663 htab->plt_entry_size
3664 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
3668 htab->plt_header_size
3669 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
3670 htab->plt_entry_size
3671 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
3674 if (elf_elfheader (dynobj))
3675 elf_elfheader (dynobj)->e_ident[EI_CLASS] = ELFCLASS32;
3680 Test for thumb only architectures. Note - we cannot just call
3681 using_thumb_only() as the attributes in the output bfd have not been
3682 initialised at this point, so instead we use the input bfd. */
3683 bfd * saved_obfd = htab->obfd;
3685 htab->obfd = dynobj;
3686 if (using_thumb_only (htab))
3688 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
3689 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
3691 htab->obfd = saved_obfd;
3694 if (!htab->root.splt
3695 || !htab->root.srelplt
3697 || (!bfd_link_pic (info) && !htab->srelbss))
3703 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3706 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
3707 struct elf_link_hash_entry *dir,
3708 struct elf_link_hash_entry *ind)
3710 struct elf32_arm_link_hash_entry *edir, *eind;
3712 edir = (struct elf32_arm_link_hash_entry *) dir;
3713 eind = (struct elf32_arm_link_hash_entry *) ind;
3715 if (eind->dyn_relocs != NULL)
3717 if (edir->dyn_relocs != NULL)
3719 struct elf_dyn_relocs **pp;
3720 struct elf_dyn_relocs *p;
3722 /* Add reloc counts against the indirect sym to the direct sym
3723 list. Merge any entries against the same section. */
3724 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3726 struct elf_dyn_relocs *q;
3728 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3729 if (q->sec == p->sec)
3731 q->pc_count += p->pc_count;
3732 q->count += p->count;
3739 *pp = edir->dyn_relocs;
3742 edir->dyn_relocs = eind->dyn_relocs;
3743 eind->dyn_relocs = NULL;
3746 if (ind->root.type == bfd_link_hash_indirect)
3748 /* Copy over PLT info. */
3749 edir->plt.thumb_refcount += eind->plt.thumb_refcount;
3750 eind->plt.thumb_refcount = 0;
3751 edir->plt.maybe_thumb_refcount += eind->plt.maybe_thumb_refcount;
3752 eind->plt.maybe_thumb_refcount = 0;
3753 edir->plt.noncall_refcount += eind->plt.noncall_refcount;
3754 eind->plt.noncall_refcount = 0;
3756 /* We should only allocate a function to .iplt once the final
3757 symbol information is known. */
3758 BFD_ASSERT (!eind->is_iplt);
3760 if (dir->got.refcount <= 0)
3762 edir->tls_type = eind->tls_type;
3763 eind->tls_type = GOT_UNKNOWN;
3767 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3770 /* Destroy an ARM elf linker hash table. */
3773 elf32_arm_link_hash_table_free (bfd *obfd)
3775 struct elf32_arm_link_hash_table *ret
3776 = (struct elf32_arm_link_hash_table *) obfd->link.hash;
3778 bfd_hash_table_free (&ret->stub_hash_table);
3779 _bfd_elf_link_hash_table_free (obfd);
3782 /* Create an ARM elf linker hash table. */
3784 static struct bfd_link_hash_table *
3785 elf32_arm_link_hash_table_create (bfd *abfd)
3787 struct elf32_arm_link_hash_table *ret;
3788 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
3790 ret = (struct elf32_arm_link_hash_table *) bfd_zmalloc (amt);
3794 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
3795 elf32_arm_link_hash_newfunc,
3796 sizeof (struct elf32_arm_link_hash_entry),
3803 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3804 ret->stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
3805 #ifdef FOUR_WORD_PLT
3806 ret->plt_header_size = 16;
3807 ret->plt_entry_size = 16;
3809 ret->plt_header_size = 20;
3810 ret->plt_entry_size = elf32_arm_use_long_plt_entry ? 16 : 12;
3815 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
3816 sizeof (struct elf32_arm_stub_hash_entry)))
3818 _bfd_elf_link_hash_table_free (abfd);
3821 ret->root.root.hash_table_free = elf32_arm_link_hash_table_free;
3823 return &ret->root.root;
3826 /* Determine what kind of NOPs are available. */
3829 arch_has_arm_nop (struct elf32_arm_link_hash_table *globals)
3831 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3834 /* Force return logic to be reviewed for each new architecture. */
3835 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3836 || arch == TAG_CPU_ARCH_V8M_BASE
3837 || arch == TAG_CPU_ARCH_V8M_MAIN);
3839 return (arch == TAG_CPU_ARCH_V6T2
3840 || arch == TAG_CPU_ARCH_V6K
3841 || arch == TAG_CPU_ARCH_V7
3842 || arch == TAG_CPU_ARCH_V8);
3846 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
3850 case arm_stub_long_branch_thumb_only:
3851 case arm_stub_long_branch_thumb2_only:
3852 case arm_stub_long_branch_thumb2_only_pure:
3853 case arm_stub_long_branch_v4t_thumb_arm:
3854 case arm_stub_short_branch_v4t_thumb_arm:
3855 case arm_stub_long_branch_v4t_thumb_arm_pic:
3856 case arm_stub_long_branch_v4t_thumb_tls_pic:
3857 case arm_stub_long_branch_thumb_only_pic:
3858 case arm_stub_cmse_branch_thumb_only:
3869 /* Determine the type of stub needed, if any, for a call. */
3871 static enum elf32_arm_stub_type
3872 arm_type_of_stub (struct bfd_link_info *info,
3873 asection *input_sec,
3874 const Elf_Internal_Rela *rel,
3875 unsigned char st_type,
3876 enum arm_st_branch_type *actual_branch_type,
3877 struct elf32_arm_link_hash_entry *hash,
3878 bfd_vma destination,
3884 bfd_signed_vma branch_offset;
3885 unsigned int r_type;
3886 struct elf32_arm_link_hash_table * globals;
3887 bfd_boolean thumb2, thumb2_bl, thumb_only;
3888 enum elf32_arm_stub_type stub_type = arm_stub_none;
3890 enum arm_st_branch_type branch_type = *actual_branch_type;
3891 union gotplt_union *root_plt;
3892 struct arm_plt_info *arm_plt;
3896 if (branch_type == ST_BRANCH_LONG)
3899 globals = elf32_arm_hash_table (info);
3900 if (globals == NULL)
3903 thumb_only = using_thumb_only (globals);
3904 thumb2 = using_thumb2 (globals);
3905 thumb2_bl = using_thumb2_bl (globals);
3907 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3909 /* True for architectures that implement the thumb2 movw instruction. */
3910 thumb2_movw = thumb2 || (arch == TAG_CPU_ARCH_V8M_BASE);
3912 /* Determine where the call point is. */
3913 location = (input_sec->output_offset
3914 + input_sec->output_section->vma
3917 r_type = ELF32_R_TYPE (rel->r_info);
3919 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
3920 are considering a function call relocation. */
3921 if (thumb_only && (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3922 || r_type == R_ARM_THM_JUMP19)
3923 && branch_type == ST_BRANCH_TO_ARM)
3924 branch_type = ST_BRANCH_TO_THUMB;
3926 /* For TLS call relocs, it is the caller's responsibility to provide
3927 the address of the appropriate trampoline. */
3928 if (r_type != R_ARM_TLS_CALL
3929 && r_type != R_ARM_THM_TLS_CALL
3930 && elf32_arm_get_plt_info (input_bfd, globals, hash,
3931 ELF32_R_SYM (rel->r_info), &root_plt,
3933 && root_plt->offset != (bfd_vma) -1)
3937 if (hash == NULL || hash->is_iplt)
3938 splt = globals->root.iplt;
3940 splt = globals->root.splt;
3945 /* Note when dealing with PLT entries: the main PLT stub is in
3946 ARM mode, so if the branch is in Thumb mode, another
3947 Thumb->ARM stub will be inserted later just before the ARM
3948 PLT stub. If a long branch stub is needed, we'll add a
3949 Thumb->Arm one and branch directly to the ARM PLT entry.
3950 Here, we have to check if a pre-PLT Thumb->ARM stub
3951 is needed and if it will be close enough. */
3953 destination = (splt->output_section->vma
3954 + splt->output_offset
3955 + root_plt->offset);
3958 /* Thumb branch/call to PLT: it can become a branch to ARM
3959 or to Thumb. We must perform the same checks and
3960 corrections as in elf32_arm_final_link_relocate. */
3961 if ((r_type == R_ARM_THM_CALL)
3962 || (r_type == R_ARM_THM_JUMP24))
3964 if (globals->use_blx
3965 && r_type == R_ARM_THM_CALL
3968 /* If the Thumb BLX instruction is available, convert
3969 the BL to a BLX instruction to call the ARM-mode
3971 branch_type = ST_BRANCH_TO_ARM;
3976 /* Target the Thumb stub before the ARM PLT entry. */
3977 destination -= PLT_THUMB_STUB_SIZE;
3978 branch_type = ST_BRANCH_TO_THUMB;
3983 branch_type = ST_BRANCH_TO_ARM;
3987 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3988 BFD_ASSERT (st_type != STT_GNU_IFUNC);
3990 branch_offset = (bfd_signed_vma)(destination - location);
3992 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3993 || r_type == R_ARM_THM_TLS_CALL || r_type == R_ARM_THM_JUMP19)
3995 /* Handle cases where:
3996 - this call goes too far (different Thumb/Thumb2 max
3998 - it's a Thumb->Arm call and blx is not available, or it's a
3999 Thumb->Arm branch (not bl). A stub is needed in this case,
4000 but only if this call is not through a PLT entry. Indeed,
4001 PLT stubs handle mode switching already.
4004 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
4005 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
4007 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
4008 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
4010 && (branch_offset > THM2_MAX_FWD_COND_BRANCH_OFFSET
4011 || (branch_offset < THM2_MAX_BWD_COND_BRANCH_OFFSET))
4012 && (r_type == R_ARM_THM_JUMP19))
4013 || (branch_type == ST_BRANCH_TO_ARM
4014 && (((r_type == R_ARM_THM_CALL
4015 || r_type == R_ARM_THM_TLS_CALL) && !globals->use_blx)
4016 || (r_type == R_ARM_THM_JUMP24)
4017 || (r_type == R_ARM_THM_JUMP19))
4020 /* If we need to insert a Thumb-Thumb long branch stub to a
4021 PLT, use one that branches directly to the ARM PLT
4022 stub. If we pretended we'd use the pre-PLT Thumb->ARM
4023 stub, undo this now. */
4024 if ((branch_type == ST_BRANCH_TO_THUMB) && use_plt && !thumb_only) {
4025 branch_type = ST_BRANCH_TO_ARM;
4026 branch_offset += PLT_THUMB_STUB_SIZE;
4029 if (branch_type == ST_BRANCH_TO_THUMB)
4031 /* Thumb to thumb. */
4034 if (input_sec->flags & SEC_ELF_PURECODE)
4035 (*_bfd_error_handler) (_("%B(%s): warning: long branch "
4036 " veneers used in section with "
4037 "SHF_ARM_PURECODE section "
4038 "attribute is only supported"
4039 " for M-profile targets that "
4040 "implement the movw "
4043 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
4045 ? ((globals->use_blx
4046 && (r_type == R_ARM_THM_CALL))
4047 /* V5T and above. Stub starts with ARM code, so
4048 we must be able to switch mode before
4049 reaching it, which is only possible for 'bl'
4050 (ie R_ARM_THM_CALL relocation). */
4051 ? arm_stub_long_branch_any_thumb_pic
4052 /* On V4T, use Thumb code only. */
4053 : arm_stub_long_branch_v4t_thumb_thumb_pic)
4055 /* non-PIC stubs. */
4056 : ((globals->use_blx
4057 && (r_type == R_ARM_THM_CALL))
4058 /* V5T and above. */
4059 ? arm_stub_long_branch_any_any
4061 : arm_stub_long_branch_v4t_thumb_thumb);
4065 if (thumb2_movw && (input_sec->flags & SEC_ELF_PURECODE))
4066 stub_type = arm_stub_long_branch_thumb2_only_pure;
4069 if (input_sec->flags & SEC_ELF_PURECODE)
4070 (*_bfd_error_handler) (_("%B(%s): warning: long branch "
4071 " veneers used in section with "
4072 "SHF_ARM_PURECODE section "
4073 "attribute is only supported"
4074 " for M-profile targets that "
4075 "implement the movw "
4078 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
4080 ? arm_stub_long_branch_thumb_only_pic
4082 : (thumb2 ? arm_stub_long_branch_thumb2_only
4083 : arm_stub_long_branch_thumb_only);
4089 if (input_sec->flags & SEC_ELF_PURECODE)
4090 (*_bfd_error_handler) (_("%B(%s): warning: long branch "
4091 " veneers used in section with "
4092 "SHF_ARM_PURECODE section "
4093 "attribute is only supported"
4094 " for M-profile targets that "
4095 "implement the movw "
4100 && sym_sec->owner != NULL
4101 && !INTERWORK_FLAG (sym_sec->owner))
4103 (*_bfd_error_handler)
4104 (_("%B(%s): warning: interworking not enabled.\n"
4105 " first occurrence: %B: Thumb call to ARM"),
4106 sym_sec->owner, input_bfd, name);
4110 (bfd_link_pic (info) | globals->pic_veneer)
4112 ? (r_type == R_ARM_THM_TLS_CALL
4113 /* TLS PIC stubs. */
4114 ? (globals->use_blx ? arm_stub_long_branch_any_tls_pic
4115 : arm_stub_long_branch_v4t_thumb_tls_pic)
4116 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
4117 /* V5T PIC and above. */
4118 ? arm_stub_long_branch_any_arm_pic
4120 : arm_stub_long_branch_v4t_thumb_arm_pic))
4122 /* non-PIC stubs. */
4123 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
4124 /* V5T and above. */
4125 ? arm_stub_long_branch_any_any
4127 : arm_stub_long_branch_v4t_thumb_arm);
4129 /* Handle v4t short branches. */
4130 if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
4131 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
4132 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
4133 stub_type = arm_stub_short_branch_v4t_thumb_arm;
4137 else if (r_type == R_ARM_CALL
4138 || r_type == R_ARM_JUMP24
4139 || r_type == R_ARM_PLT32
4140 || r_type == R_ARM_TLS_CALL)
4142 if (input_sec->flags & SEC_ELF_PURECODE)
4143 (*_bfd_error_handler) (_("%B(%s): warning: long branch "
4144 " veneers used in section with "
4145 "SHF_ARM_PURECODE section "
4146 "attribute is only supported"
4147 " for M-profile targets that "
4148 "implement the movw "
4150 if (branch_type == ST_BRANCH_TO_THUMB)
4155 && sym_sec->owner != NULL
4156 && !INTERWORK_FLAG (sym_sec->owner))
4158 (*_bfd_error_handler)
4159 (_("%B(%s): warning: interworking not enabled.\n"
4160 " first occurrence: %B: ARM call to Thumb"),
4161 sym_sec->owner, input_bfd, name);
4164 /* We have an extra 2-bytes reach because of
4165 the mode change (bit 24 (H) of BLX encoding). */
4166 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
4167 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
4168 || (r_type == R_ARM_CALL && !globals->use_blx)
4169 || (r_type == R_ARM_JUMP24)
4170 || (r_type == R_ARM_PLT32))
4172 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
4174 ? ((globals->use_blx)
4175 /* V5T and above. */
4176 ? arm_stub_long_branch_any_thumb_pic
4178 : arm_stub_long_branch_v4t_arm_thumb_pic)
4180 /* non-PIC stubs. */
4181 : ((globals->use_blx)
4182 /* V5T and above. */
4183 ? arm_stub_long_branch_any_any
4185 : arm_stub_long_branch_v4t_arm_thumb);
4191 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
4192 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
4195 (bfd_link_pic (info) | globals->pic_veneer)
4197 ? (r_type == R_ARM_TLS_CALL
4199 ? arm_stub_long_branch_any_tls_pic
4201 ? arm_stub_long_branch_arm_nacl_pic
4202 : arm_stub_long_branch_any_arm_pic))
4203 /* non-PIC stubs. */
4205 ? arm_stub_long_branch_arm_nacl
4206 : arm_stub_long_branch_any_any);
4211 /* If a stub is needed, record the actual destination type. */
4212 if (stub_type != arm_stub_none)
4213 *actual_branch_type = branch_type;
4218 /* Build a name for an entry in the stub hash table. */
4221 elf32_arm_stub_name (const asection *input_section,
4222 const asection *sym_sec,
4223 const struct elf32_arm_link_hash_entry *hash,
4224 const Elf_Internal_Rela *rel,
4225 enum elf32_arm_stub_type stub_type)
4232 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1 + 2 + 1;
4233 stub_name = (char *) bfd_malloc (len);
4234 if (stub_name != NULL)
4235 sprintf (stub_name, "%08x_%s+%x_%d",
4236 input_section->id & 0xffffffff,
4237 hash->root.root.root.string,
4238 (int) rel->r_addend & 0xffffffff,
4243 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
4244 stub_name = (char *) bfd_malloc (len);
4245 if (stub_name != NULL)
4246 sprintf (stub_name, "%08x_%x:%x+%x_%d",
4247 input_section->id & 0xffffffff,
4248 sym_sec->id & 0xffffffff,
4249 ELF32_R_TYPE (rel->r_info) == R_ARM_TLS_CALL
4250 || ELF32_R_TYPE (rel->r_info) == R_ARM_THM_TLS_CALL
4251 ? 0 : (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
4252 (int) rel->r_addend & 0xffffffff,
4259 /* Look up an entry in the stub hash. Stub entries are cached because
4260 creating the stub name takes a bit of time. */
4262 static struct elf32_arm_stub_hash_entry *
4263 elf32_arm_get_stub_entry (const asection *input_section,
4264 const asection *sym_sec,
4265 struct elf_link_hash_entry *hash,
4266 const Elf_Internal_Rela *rel,
4267 struct elf32_arm_link_hash_table *htab,
4268 enum elf32_arm_stub_type stub_type)
4270 struct elf32_arm_stub_hash_entry *stub_entry;
4271 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
4272 const asection *id_sec;
4274 if ((input_section->flags & SEC_CODE) == 0)
4277 /* If this input section is part of a group of sections sharing one
4278 stub section, then use the id of the first section in the group.
4279 Stub names need to include a section id, as there may well be
4280 more than one stub used to reach say, printf, and we need to
4281 distinguish between them. */
4282 BFD_ASSERT (input_section->id <= htab->top_id);
4283 id_sec = htab->stub_group[input_section->id].link_sec;
4285 if (h != NULL && h->stub_cache != NULL
4286 && h->stub_cache->h == h
4287 && h->stub_cache->id_sec == id_sec
4288 && h->stub_cache->stub_type == stub_type)
4290 stub_entry = h->stub_cache;
4296 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel, stub_type);
4297 if (stub_name == NULL)
4300 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
4301 stub_name, FALSE, FALSE);
4303 h->stub_cache = stub_entry;
4311 /* Whether veneers of type STUB_TYPE require to be in a dedicated output
4315 arm_dedicated_stub_output_section_required (enum elf32_arm_stub_type stub_type)
4317 if (stub_type >= max_stub_type)
4318 abort (); /* Should be unreachable. */
4322 case arm_stub_cmse_branch_thumb_only:
4329 abort (); /* Should be unreachable. */
4332 /* Required alignment (as a power of 2) for the dedicated section holding
4333 veneers of type STUB_TYPE, or 0 if veneers of this type are interspersed
4334 with input sections. */
4337 arm_dedicated_stub_output_section_required_alignment
4338 (enum elf32_arm_stub_type stub_type)
4340 if (stub_type >= max_stub_type)
4341 abort (); /* Should be unreachable. */
4345 /* Vectors of Secure Gateway veneers must be aligned on 32byte
4347 case arm_stub_cmse_branch_thumb_only:
4351 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4355 abort (); /* Should be unreachable. */
4358 /* Name of the dedicated output section to put veneers of type STUB_TYPE, or
4359 NULL if veneers of this type are interspersed with input sections. */
4362 arm_dedicated_stub_output_section_name (enum elf32_arm_stub_type stub_type)
4364 if (stub_type >= max_stub_type)
4365 abort (); /* Should be unreachable. */
4369 case arm_stub_cmse_branch_thumb_only:
4370 return ".gnu.sgstubs";
4373 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4377 abort (); /* Should be unreachable. */
4380 /* If veneers of type STUB_TYPE should go in a dedicated output section,
4381 returns the address of the hash table field in HTAB holding a pointer to the
4382 corresponding input section. Otherwise, returns NULL. */
4385 arm_dedicated_stub_input_section_ptr (struct elf32_arm_link_hash_table *htab,
4386 enum elf32_arm_stub_type stub_type)
4388 if (stub_type >= max_stub_type)
4389 abort (); /* Should be unreachable. */
4393 case arm_stub_cmse_branch_thumb_only:
4394 return &htab->cmse_stub_sec;
4397 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4401 abort (); /* Should be unreachable. */
4404 /* Find or create a stub section to contain a stub of type STUB_TYPE. SECTION
4405 is the section that branch into veneer and can be NULL if stub should go in
4406 a dedicated output section. Returns a pointer to the stub section, and the
4407 section to which the stub section will be attached (in *LINK_SEC_P).
4408 LINK_SEC_P may be NULL. */
4411 elf32_arm_create_or_find_stub_sec (asection **link_sec_p, asection *section,
4412 struct elf32_arm_link_hash_table *htab,
4413 enum elf32_arm_stub_type stub_type)
4415 asection *link_sec, *out_sec, **stub_sec_p;
4416 const char *stub_sec_prefix;
4417 bfd_boolean dedicated_output_section =
4418 arm_dedicated_stub_output_section_required (stub_type);
4421 if (dedicated_output_section)
4423 bfd *output_bfd = htab->obfd;
4424 const char *out_sec_name =
4425 arm_dedicated_stub_output_section_name (stub_type);
4427 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
4428 stub_sec_prefix = out_sec_name;
4429 align = arm_dedicated_stub_output_section_required_alignment (stub_type);
4430 out_sec = bfd_get_section_by_name (output_bfd, out_sec_name);
4431 if (out_sec == NULL)
4433 (*_bfd_error_handler) (_("No address assigned to the veneers output "
4434 "section %s"), out_sec_name);
4440 BFD_ASSERT (section->id <= htab->top_id);
4441 link_sec = htab->stub_group[section->id].link_sec;
4442 BFD_ASSERT (link_sec != NULL);
4443 stub_sec_p = &htab->stub_group[section->id].stub_sec;
4444 if (*stub_sec_p == NULL)
4445 stub_sec_p = &htab->stub_group[link_sec->id].stub_sec;
4446 stub_sec_prefix = link_sec->name;
4447 out_sec = link_sec->output_section;
4448 align = htab->nacl_p ? 4 : 3;
4451 if (*stub_sec_p == NULL)
4457 namelen = strlen (stub_sec_prefix);
4458 len = namelen + sizeof (STUB_SUFFIX);
4459 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
4463 memcpy (s_name, stub_sec_prefix, namelen);
4464 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4465 *stub_sec_p = (*htab->add_stub_section) (s_name, out_sec, link_sec,
4467 if (*stub_sec_p == NULL)
4470 out_sec->flags |= SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
4471 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY
4475 if (!dedicated_output_section)
4476 htab->stub_group[section->id].stub_sec = *stub_sec_p;
4479 *link_sec_p = link_sec;
4484 /* Add a new stub entry to the stub hash. Not all fields of the new
4485 stub entry are initialised. */
4487 static struct elf32_arm_stub_hash_entry *
4488 elf32_arm_add_stub (const char *stub_name, asection *section,
4489 struct elf32_arm_link_hash_table *htab,
4490 enum elf32_arm_stub_type stub_type)
4494 struct elf32_arm_stub_hash_entry *stub_entry;
4496 stub_sec = elf32_arm_create_or_find_stub_sec (&link_sec, section, htab,
4498 if (stub_sec == NULL)
4501 /* Enter this entry into the linker stub hash table. */
4502 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4504 if (stub_entry == NULL)
4506 if (section == NULL)
4508 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
4514 stub_entry->stub_sec = stub_sec;
4515 stub_entry->stub_offset = (bfd_vma) -1;
4516 stub_entry->id_sec = link_sec;
4521 /* Store an Arm insn into an output section not processed by
4522 elf32_arm_write_section. */
4525 put_arm_insn (struct elf32_arm_link_hash_table * htab,
4526 bfd * output_bfd, bfd_vma val, void * ptr)
4528 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4529 bfd_putl32 (val, ptr);
4531 bfd_putb32 (val, ptr);
4534 /* Store a 16-bit Thumb insn into an output section not processed by
4535 elf32_arm_write_section. */
4538 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
4539 bfd * output_bfd, bfd_vma val, void * ptr)
4541 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4542 bfd_putl16 (val, ptr);
4544 bfd_putb16 (val, ptr);
4547 /* Store a Thumb2 insn into an output section not processed by
4548 elf32_arm_write_section. */
4551 put_thumb2_insn (struct elf32_arm_link_hash_table * htab,
4552 bfd * output_bfd, bfd_vma val, bfd_byte * ptr)
4554 /* T2 instructions are 16-bit streamed. */
4555 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4557 bfd_putl16 ((val >> 16) & 0xffff, ptr);
4558 bfd_putl16 ((val & 0xffff), ptr + 2);
4562 bfd_putb16 ((val >> 16) & 0xffff, ptr);
4563 bfd_putb16 ((val & 0xffff), ptr + 2);
4567 /* If it's possible to change R_TYPE to a more efficient access
4568 model, return the new reloc type. */
4571 elf32_arm_tls_transition (struct bfd_link_info *info, int r_type,
4572 struct elf_link_hash_entry *h)
4574 int is_local = (h == NULL);
4576 if (bfd_link_pic (info)
4577 || (h && h->root.type == bfd_link_hash_undefweak))
4580 /* We do not support relaxations for Old TLS models. */
4583 case R_ARM_TLS_GOTDESC:
4584 case R_ARM_TLS_CALL:
4585 case R_ARM_THM_TLS_CALL:
4586 case R_ARM_TLS_DESCSEQ:
4587 case R_ARM_THM_TLS_DESCSEQ:
4588 return is_local ? R_ARM_TLS_LE32 : R_ARM_TLS_IE32;
4594 static bfd_reloc_status_type elf32_arm_final_link_relocate
4595 (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
4596 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
4597 const char *, unsigned char, enum arm_st_branch_type,
4598 struct elf_link_hash_entry *, bfd_boolean *, char **);
4601 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type)
4605 case arm_stub_a8_veneer_b_cond:
4606 case arm_stub_a8_veneer_b:
4607 case arm_stub_a8_veneer_bl:
4610 case arm_stub_long_branch_any_any:
4611 case arm_stub_long_branch_v4t_arm_thumb:
4612 case arm_stub_long_branch_thumb_only:
4613 case arm_stub_long_branch_thumb2_only:
4614 case arm_stub_long_branch_thumb2_only_pure:
4615 case arm_stub_long_branch_v4t_thumb_thumb:
4616 case arm_stub_long_branch_v4t_thumb_arm:
4617 case arm_stub_short_branch_v4t_thumb_arm:
4618 case arm_stub_long_branch_any_arm_pic:
4619 case arm_stub_long_branch_any_thumb_pic:
4620 case arm_stub_long_branch_v4t_thumb_thumb_pic:
4621 case arm_stub_long_branch_v4t_arm_thumb_pic:
4622 case arm_stub_long_branch_v4t_thumb_arm_pic:
4623 case arm_stub_long_branch_thumb_only_pic:
4624 case arm_stub_long_branch_any_tls_pic:
4625 case arm_stub_long_branch_v4t_thumb_tls_pic:
4626 case arm_stub_cmse_branch_thumb_only:
4627 case arm_stub_a8_veneer_blx:
4630 case arm_stub_long_branch_arm_nacl:
4631 case arm_stub_long_branch_arm_nacl_pic:
4635 abort (); /* Should be unreachable. */
4639 /* Returns whether stubs of type STUB_TYPE take over the symbol they are
4640 veneering (TRUE) or have their own symbol (FALSE). */
4643 arm_stub_sym_claimed (enum elf32_arm_stub_type stub_type)
4645 if (stub_type >= max_stub_type)
4646 abort (); /* Should be unreachable. */
4650 case arm_stub_cmse_branch_thumb_only:
4657 abort (); /* Should be unreachable. */
4660 /* Returns the padding needed for the dedicated section used stubs of type
4664 arm_dedicated_stub_section_padding (enum elf32_arm_stub_type stub_type)
4666 if (stub_type >= max_stub_type)
4667 abort (); /* Should be unreachable. */
4671 case arm_stub_cmse_branch_thumb_only:
4678 abort (); /* Should be unreachable. */
4681 /* If veneers of type STUB_TYPE should go in a dedicated output section,
4682 returns the address of the hash table field in HTAB holding the offset at
4683 which new veneers should be layed out in the stub section. */
4686 arm_new_stubs_start_offset_ptr (struct elf32_arm_link_hash_table *htab,
4687 enum elf32_arm_stub_type stub_type)
4691 case arm_stub_cmse_branch_thumb_only:
4692 return &htab->new_cmse_stub_offset;
4695 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4701 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
4705 bfd_boolean removed_sg_veneer;
4706 struct elf32_arm_stub_hash_entry *stub_entry;
4707 struct elf32_arm_link_hash_table *globals;
4708 struct bfd_link_info *info;
4715 const insn_sequence *template_sequence;
4717 int stub_reloc_idx[MAXRELOCS] = {-1, -1};
4718 int stub_reloc_offset[MAXRELOCS] = {0, 0};
4720 int just_allocated = 0;
4722 /* Massage our args to the form they really have. */
4723 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
4724 info = (struct bfd_link_info *) in_arg;
4726 globals = elf32_arm_hash_table (info);
4727 if (globals == NULL)
4730 stub_sec = stub_entry->stub_sec;
4732 if ((globals->fix_cortex_a8 < 0)
4733 != (arm_stub_required_alignment (stub_entry->stub_type) == 2))
4734 /* We have to do less-strictly-aligned fixes last. */
4737 /* Assign a slot at the end of section if none assigned yet. */
4738 if (stub_entry->stub_offset == (bfd_vma) -1)
4740 stub_entry->stub_offset = stub_sec->size;
4743 loc = stub_sec->contents + stub_entry->stub_offset;
4745 stub_bfd = stub_sec->owner;
4747 /* This is the address of the stub destination. */
4748 sym_value = (stub_entry->target_value
4749 + stub_entry->target_section->output_offset
4750 + stub_entry->target_section->output_section->vma);
4752 template_sequence = stub_entry->stub_template;
4753 template_size = stub_entry->stub_template_size;
4756 for (i = 0; i < template_size; i++)
4758 switch (template_sequence[i].type)
4762 bfd_vma data = (bfd_vma) template_sequence[i].data;
4763 if (template_sequence[i].reloc_addend != 0)
4765 /* We've borrowed the reloc_addend field to mean we should
4766 insert a condition code into this (Thumb-1 branch)
4767 instruction. See THUMB16_BCOND_INSN. */
4768 BFD_ASSERT ((data & 0xff00) == 0xd000);
4769 data |= ((stub_entry->orig_insn >> 22) & 0xf) << 8;
4771 bfd_put_16 (stub_bfd, data, loc + size);
4777 bfd_put_16 (stub_bfd,
4778 (template_sequence[i].data >> 16) & 0xffff,
4780 bfd_put_16 (stub_bfd, template_sequence[i].data & 0xffff,
4782 if (template_sequence[i].r_type != R_ARM_NONE)
4784 stub_reloc_idx[nrelocs] = i;
4785 stub_reloc_offset[nrelocs++] = size;
4791 bfd_put_32 (stub_bfd, template_sequence[i].data,
4793 /* Handle cases where the target is encoded within the
4795 if (template_sequence[i].r_type == R_ARM_JUMP24)
4797 stub_reloc_idx[nrelocs] = i;
4798 stub_reloc_offset[nrelocs++] = size;
4804 bfd_put_32 (stub_bfd, template_sequence[i].data, loc + size);
4805 stub_reloc_idx[nrelocs] = i;
4806 stub_reloc_offset[nrelocs++] = size;
4817 stub_sec->size += size;
4819 /* Stub size has already been computed in arm_size_one_stub. Check
4821 BFD_ASSERT (size == stub_entry->stub_size);
4823 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4824 if (stub_entry->branch_type == ST_BRANCH_TO_THUMB)
4827 /* Assume non empty slots have at least one and at most MAXRELOCS entries
4828 to relocate in each stub. */
4830 (size == 0 && stub_entry->stub_type == arm_stub_cmse_branch_thumb_only);
4831 BFD_ASSERT (removed_sg_veneer || (nrelocs != 0 && nrelocs <= MAXRELOCS));
4833 for (i = 0; i < nrelocs; i++)
4835 Elf_Internal_Rela rel;
4836 bfd_boolean unresolved_reloc;
4837 char *error_message;
4839 sym_value + template_sequence[stub_reloc_idx[i]].reloc_addend;
4841 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
4842 rel.r_info = ELF32_R_INFO (0,
4843 template_sequence[stub_reloc_idx[i]].r_type);
4846 if (stub_entry->stub_type == arm_stub_a8_veneer_b_cond && i == 0)
4847 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4848 template should refer back to the instruction after the original
4849 branch. We use target_section as Cortex-A8 erratum workaround stubs
4850 are only generated when both source and target are in the same
4852 points_to = stub_entry->target_section->output_section->vma
4853 + stub_entry->target_section->output_offset
4854 + stub_entry->source_value;
4856 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4857 (template_sequence[stub_reloc_idx[i]].r_type),
4858 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
4859 points_to, info, stub_entry->target_section, "", STT_FUNC,
4860 stub_entry->branch_type,
4861 (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc,
4869 /* Calculate the template, template size and instruction size for a stub.
4870 Return value is the instruction size. */
4873 find_stub_size_and_template (enum elf32_arm_stub_type stub_type,
4874 const insn_sequence **stub_template,
4875 int *stub_template_size)
4877 const insn_sequence *template_sequence = NULL;
4878 int template_size = 0, i;
4881 template_sequence = stub_definitions[stub_type].template_sequence;
4883 *stub_template = template_sequence;
4885 template_size = stub_definitions[stub_type].template_size;
4886 if (stub_template_size)
4887 *stub_template_size = template_size;
4890 for (i = 0; i < template_size; i++)
4892 switch (template_sequence[i].type)
4913 /* As above, but don't actually build the stub. Just bump offset so
4914 we know stub section sizes. */
4917 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
4918 void *in_arg ATTRIBUTE_UNUSED)
4920 struct elf32_arm_stub_hash_entry *stub_entry;
4921 const insn_sequence *template_sequence;
4922 int template_size, size;
4924 /* Massage our args to the form they really have. */
4925 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
4927 BFD_ASSERT((stub_entry->stub_type > arm_stub_none)
4928 && stub_entry->stub_type < ARRAY_SIZE(stub_definitions));
4930 size = find_stub_size_and_template (stub_entry->stub_type, &template_sequence,
4933 /* Initialized to -1. Null size indicates an empty slot full of zeros. */
4934 if (stub_entry->stub_template_size)
4936 stub_entry->stub_size = size;
4937 stub_entry->stub_template = template_sequence;
4938 stub_entry->stub_template_size = template_size;
4941 /* Already accounted for. */
4942 if (stub_entry->stub_offset != (bfd_vma) -1)
4945 size = (size + 7) & ~7;
4946 stub_entry->stub_sec->size += size;
4951 /* External entry points for sizing and building linker stubs. */
4953 /* Set up various things so that we can make a list of input sections
4954 for each output section included in the link. Returns -1 on error,
4955 0 when no stubs will be needed, and 1 on success. */
4958 elf32_arm_setup_section_lists (bfd *output_bfd,
4959 struct bfd_link_info *info)
4962 unsigned int bfd_count;
4963 unsigned int top_id, top_index;
4965 asection **input_list, **list;
4967 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4971 if (! is_elf_hash_table (htab))
4974 /* Count the number of input BFDs and find the top input section id. */
4975 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
4977 input_bfd = input_bfd->link.next)
4980 for (section = input_bfd->sections;
4982 section = section->next)
4984 if (top_id < section->id)
4985 top_id = section->id;
4988 htab->bfd_count = bfd_count;
4990 amt = sizeof (struct map_stub) * (top_id + 1);
4991 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4992 if (htab->stub_group == NULL)
4994 htab->top_id = top_id;
4996 /* We can't use output_bfd->section_count here to find the top output
4997 section index as some sections may have been removed, and
4998 _bfd_strip_section_from_output doesn't renumber the indices. */
4999 for (section = output_bfd->sections, top_index = 0;
5001 section = section->next)
5003 if (top_index < section->index)
5004 top_index = section->index;
5007 htab->top_index = top_index;
5008 amt = sizeof (asection *) * (top_index + 1);
5009 input_list = (asection **) bfd_malloc (amt);
5010 htab->input_list = input_list;
5011 if (input_list == NULL)
5014 /* For sections we aren't interested in, mark their entries with a
5015 value we can check later. */
5016 list = input_list + top_index;
5018 *list = bfd_abs_section_ptr;
5019 while (list-- != input_list);
5021 for (section = output_bfd->sections;
5023 section = section->next)
5025 if ((section->flags & SEC_CODE) != 0)
5026 input_list[section->index] = NULL;
5032 /* The linker repeatedly calls this function for each input section,
5033 in the order that input sections are linked into output sections.
5034 Build lists of input sections to determine groupings between which
5035 we may insert linker stubs. */
5038 elf32_arm_next_input_section (struct bfd_link_info *info,
5041 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5046 if (isec->output_section->index <= htab->top_index)
5048 asection **list = htab->input_list + isec->output_section->index;
5050 if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0)
5052 /* Steal the link_sec pointer for our list. */
5053 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
5054 /* This happens to make the list in reverse order,
5055 which we reverse later. */
5056 PREV_SEC (isec) = *list;
5062 /* See whether we can group stub sections together. Grouping stub
5063 sections may result in fewer stubs. More importantly, we need to
5064 put all .init* and .fini* stubs at the end of the .init or
5065 .fini output sections respectively, because glibc splits the
5066 _init and _fini functions into multiple parts. Putting a stub in
5067 the middle of a function is not a good idea. */
5070 group_sections (struct elf32_arm_link_hash_table *htab,
5071 bfd_size_type stub_group_size,
5072 bfd_boolean stubs_always_after_branch)
5074 asection **list = htab->input_list;
5078 asection *tail = *list;
5081 if (tail == bfd_abs_section_ptr)
5084 /* Reverse the list: we must avoid placing stubs at the
5085 beginning of the section because the beginning of the text
5086 section may be required for an interrupt vector in bare metal
5088 #define NEXT_SEC PREV_SEC
5090 while (tail != NULL)
5092 /* Pop from tail. */
5093 asection *item = tail;
5094 tail = PREV_SEC (item);
5097 NEXT_SEC (item) = head;
5101 while (head != NULL)
5105 bfd_vma stub_group_start = head->output_offset;
5106 bfd_vma end_of_next;
5109 while (NEXT_SEC (curr) != NULL)
5111 next = NEXT_SEC (curr);
5112 end_of_next = next->output_offset + next->size;
5113 if (end_of_next - stub_group_start >= stub_group_size)
5114 /* End of NEXT is too far from start, so stop. */
5116 /* Add NEXT to the group. */
5120 /* OK, the size from the start to the start of CURR is less
5121 than stub_group_size and thus can be handled by one stub
5122 section. (Or the head section is itself larger than
5123 stub_group_size, in which case we may be toast.)
5124 We should really be keeping track of the total size of
5125 stubs added here, as stubs contribute to the final output
5129 next = NEXT_SEC (head);
5130 /* Set up this stub group. */
5131 htab->stub_group[head->id].link_sec = curr;
5133 while (head != curr && (head = next) != NULL);
5135 /* But wait, there's more! Input sections up to stub_group_size
5136 bytes after the stub section can be handled by it too. */
5137 if (!stubs_always_after_branch)
5139 stub_group_start = curr->output_offset + curr->size;
5141 while (next != NULL)
5143 end_of_next = next->output_offset + next->size;
5144 if (end_of_next - stub_group_start >= stub_group_size)
5145 /* End of NEXT is too far from stubs, so stop. */
5147 /* Add NEXT to the stub group. */
5149 next = NEXT_SEC (head);
5150 htab->stub_group[head->id].link_sec = curr;
5156 while (list++ != htab->input_list + htab->top_index);
5158 free (htab->input_list);
5163 /* Comparison function for sorting/searching relocations relating to Cortex-A8
5167 a8_reloc_compare (const void *a, const void *b)
5169 const struct a8_erratum_reloc *ra = (const struct a8_erratum_reloc *) a;
5170 const struct a8_erratum_reloc *rb = (const struct a8_erratum_reloc *) b;
5172 if (ra->from < rb->from)
5174 else if (ra->from > rb->from)
5180 static struct elf_link_hash_entry *find_thumb_glue (struct bfd_link_info *,
5181 const char *, char **);
5183 /* Helper function to scan code for sequences which might trigger the Cortex-A8
5184 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
5185 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
5189 cortex_a8_erratum_scan (bfd *input_bfd,
5190 struct bfd_link_info *info,
5191 struct a8_erratum_fix **a8_fixes_p,
5192 unsigned int *num_a8_fixes_p,
5193 unsigned int *a8_fix_table_size_p,
5194 struct a8_erratum_reloc *a8_relocs,
5195 unsigned int num_a8_relocs,
5196 unsigned prev_num_a8_fixes,
5197 bfd_boolean *stub_changed_p)
5200 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5201 struct a8_erratum_fix *a8_fixes = *a8_fixes_p;
5202 unsigned int num_a8_fixes = *num_a8_fixes_p;
5203 unsigned int a8_fix_table_size = *a8_fix_table_size_p;
5208 for (section = input_bfd->sections;
5210 section = section->next)
5212 bfd_byte *contents = NULL;
5213 struct _arm_elf_section_data *sec_data;
5217 if (elf_section_type (section) != SHT_PROGBITS
5218 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
5219 || (section->flags & SEC_EXCLUDE) != 0
5220 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
5221 || (section->output_section == bfd_abs_section_ptr))
5224 base_vma = section->output_section->vma + section->output_offset;
5226 if (elf_section_data (section)->this_hdr.contents != NULL)
5227 contents = elf_section_data (section)->this_hdr.contents;
5228 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
5231 sec_data = elf32_arm_section_data (section);
5233 for (span = 0; span < sec_data->mapcount; span++)
5235 unsigned int span_start = sec_data->map[span].vma;
5236 unsigned int span_end = (span == sec_data->mapcount - 1)
5237 ? section->size : sec_data->map[span + 1].vma;
5239 char span_type = sec_data->map[span].type;
5240 bfd_boolean last_was_32bit = FALSE, last_was_branch = FALSE;
5242 if (span_type != 't')
5245 /* Span is entirely within a single 4KB region: skip scanning. */
5246 if (((base_vma + span_start) & ~0xfff)
5247 == ((base_vma + span_end) & ~0xfff))
5250 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
5252 * The opcode is BLX.W, BL.W, B.W, Bcc.W
5253 * The branch target is in the same 4KB region as the
5254 first half of the branch.
5255 * The instruction before the branch is a 32-bit
5256 length non-branch instruction. */
5257 for (i = span_start; i < span_end;)
5259 unsigned int insn = bfd_getl16 (&contents[i]);
5260 bfd_boolean insn_32bit = FALSE, is_blx = FALSE, is_b = FALSE;
5261 bfd_boolean is_bl = FALSE, is_bcc = FALSE, is_32bit_branch;
5263 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
5268 /* Load the rest of the insn (in manual-friendly order). */
5269 insn = (insn << 16) | bfd_getl16 (&contents[i + 2]);
5271 /* Encoding T4: B<c>.W. */
5272 is_b = (insn & 0xf800d000) == 0xf0009000;
5273 /* Encoding T1: BL<c>.W. */
5274 is_bl = (insn & 0xf800d000) == 0xf000d000;
5275 /* Encoding T2: BLX<c>.W. */
5276 is_blx = (insn & 0xf800d000) == 0xf000c000;
5277 /* Encoding T3: B<c>.W (not permitted in IT block). */
5278 is_bcc = (insn & 0xf800d000) == 0xf0008000
5279 && (insn & 0x07f00000) != 0x03800000;
5282 is_32bit_branch = is_b || is_bl || is_blx || is_bcc;
5284 if (((base_vma + i) & 0xfff) == 0xffe
5288 && ! last_was_branch)
5290 bfd_signed_vma offset = 0;
5291 bfd_boolean force_target_arm = FALSE;
5292 bfd_boolean force_target_thumb = FALSE;
5294 enum elf32_arm_stub_type stub_type = arm_stub_none;
5295 struct a8_erratum_reloc key, *found;
5296 bfd_boolean use_plt = FALSE;
5298 key.from = base_vma + i;
5299 found = (struct a8_erratum_reloc *)
5300 bsearch (&key, a8_relocs, num_a8_relocs,
5301 sizeof (struct a8_erratum_reloc),
5306 char *error_message = NULL;
5307 struct elf_link_hash_entry *entry;
5309 /* We don't care about the error returned from this
5310 function, only if there is glue or not. */
5311 entry = find_thumb_glue (info, found->sym_name,
5315 found->non_a8_stub = TRUE;
5317 /* Keep a simpler condition, for the sake of clarity. */
5318 if (htab->root.splt != NULL && found->hash != NULL
5319 && found->hash->root.plt.offset != (bfd_vma) -1)
5322 if (found->r_type == R_ARM_THM_CALL)
5324 if (found->branch_type == ST_BRANCH_TO_ARM
5326 force_target_arm = TRUE;
5328 force_target_thumb = TRUE;
5332 /* Check if we have an offending branch instruction. */
5334 if (found && found->non_a8_stub)
5335 /* We've already made a stub for this instruction, e.g.
5336 it's a long branch or a Thumb->ARM stub. Assume that
5337 stub will suffice to work around the A8 erratum (see
5338 setting of always_after_branch above). */
5342 offset = (insn & 0x7ff) << 1;
5343 offset |= (insn & 0x3f0000) >> 4;
5344 offset |= (insn & 0x2000) ? 0x40000 : 0;
5345 offset |= (insn & 0x800) ? 0x80000 : 0;
5346 offset |= (insn & 0x4000000) ? 0x100000 : 0;
5347 if (offset & 0x100000)
5348 offset |= ~ ((bfd_signed_vma) 0xfffff);
5349 stub_type = arm_stub_a8_veneer_b_cond;
5351 else if (is_b || is_bl || is_blx)
5353 int s = (insn & 0x4000000) != 0;
5354 int j1 = (insn & 0x2000) != 0;
5355 int j2 = (insn & 0x800) != 0;
5359 offset = (insn & 0x7ff) << 1;
5360 offset |= (insn & 0x3ff0000) >> 4;
5364 if (offset & 0x1000000)
5365 offset |= ~ ((bfd_signed_vma) 0xffffff);
5368 offset &= ~ ((bfd_signed_vma) 3);
5370 stub_type = is_blx ? arm_stub_a8_veneer_blx :
5371 is_bl ? arm_stub_a8_veneer_bl : arm_stub_a8_veneer_b;
5374 if (stub_type != arm_stub_none)
5376 bfd_vma pc_for_insn = base_vma + i + 4;
5378 /* The original instruction is a BL, but the target is
5379 an ARM instruction. If we were not making a stub,
5380 the BL would have been converted to a BLX. Use the
5381 BLX stub instead in that case. */
5382 if (htab->use_blx && force_target_arm
5383 && stub_type == arm_stub_a8_veneer_bl)
5385 stub_type = arm_stub_a8_veneer_blx;
5389 /* Conversely, if the original instruction was
5390 BLX but the target is Thumb mode, use the BL
5392 else if (force_target_thumb
5393 && stub_type == arm_stub_a8_veneer_blx)
5395 stub_type = arm_stub_a8_veneer_bl;
5401 pc_for_insn &= ~ ((bfd_vma) 3);
5403 /* If we found a relocation, use the proper destination,
5404 not the offset in the (unrelocated) instruction.
5405 Note this is always done if we switched the stub type
5409 (bfd_signed_vma) (found->destination - pc_for_insn);
5411 /* If the stub will use a Thumb-mode branch to a
5412 PLT target, redirect it to the preceding Thumb
5414 if (stub_type != arm_stub_a8_veneer_blx && use_plt)
5415 offset -= PLT_THUMB_STUB_SIZE;
5417 target = pc_for_insn + offset;
5419 /* The BLX stub is ARM-mode code. Adjust the offset to
5420 take the different PC value (+8 instead of +4) into
5422 if (stub_type == arm_stub_a8_veneer_blx)
5425 if (((base_vma + i) & ~0xfff) == (target & ~0xfff))
5427 char *stub_name = NULL;
5429 if (num_a8_fixes == a8_fix_table_size)
5431 a8_fix_table_size *= 2;
5432 a8_fixes = (struct a8_erratum_fix *)
5433 bfd_realloc (a8_fixes,
5434 sizeof (struct a8_erratum_fix)
5435 * a8_fix_table_size);
5438 if (num_a8_fixes < prev_num_a8_fixes)
5440 /* If we're doing a subsequent scan,
5441 check if we've found the same fix as
5442 before, and try and reuse the stub
5444 stub_name = a8_fixes[num_a8_fixes].stub_name;
5445 if ((a8_fixes[num_a8_fixes].section != section)
5446 || (a8_fixes[num_a8_fixes].offset != i))
5450 *stub_changed_p = TRUE;
5456 stub_name = (char *) bfd_malloc (8 + 1 + 8 + 1);
5457 if (stub_name != NULL)
5458 sprintf (stub_name, "%x:%x", section->id, i);
5461 a8_fixes[num_a8_fixes].input_bfd = input_bfd;
5462 a8_fixes[num_a8_fixes].section = section;
5463 a8_fixes[num_a8_fixes].offset = i;
5464 a8_fixes[num_a8_fixes].target_offset =
5466 a8_fixes[num_a8_fixes].orig_insn = insn;
5467 a8_fixes[num_a8_fixes].stub_name = stub_name;
5468 a8_fixes[num_a8_fixes].stub_type = stub_type;
5469 a8_fixes[num_a8_fixes].branch_type =
5470 is_blx ? ST_BRANCH_TO_ARM : ST_BRANCH_TO_THUMB;
5477 i += insn_32bit ? 4 : 2;
5478 last_was_32bit = insn_32bit;
5479 last_was_branch = is_32bit_branch;
5483 if (elf_section_data (section)->this_hdr.contents == NULL)
5487 *a8_fixes_p = a8_fixes;
5488 *num_a8_fixes_p = num_a8_fixes;
5489 *a8_fix_table_size_p = a8_fix_table_size;
5494 /* Create or update a stub entry depending on whether the stub can already be
5495 found in HTAB. The stub is identified by:
5496 - its type STUB_TYPE
5497 - its source branch (note that several can share the same stub) whose
5498 section and relocation (if any) are given by SECTION and IRELA
5500 - its target symbol whose input section, hash, name, value and branch type
5501 are given in SYM_SEC, HASH, SYM_NAME, SYM_VALUE and BRANCH_TYPE
5504 If found, the value of the stub's target symbol is updated from SYM_VALUE
5505 and *NEW_STUB is set to FALSE. Otherwise, *NEW_STUB is set to
5506 TRUE and the stub entry is initialized.
5508 Returns the stub that was created or updated, or NULL if an error
5511 static struct elf32_arm_stub_hash_entry *
5512 elf32_arm_create_stub (struct elf32_arm_link_hash_table *htab,
5513 enum elf32_arm_stub_type stub_type, asection *section,
5514 Elf_Internal_Rela *irela, asection *sym_sec,
5515 struct elf32_arm_link_hash_entry *hash, char *sym_name,
5516 bfd_vma sym_value, enum arm_st_branch_type branch_type,
5517 bfd_boolean *new_stub)
5519 const asection *id_sec;
5521 struct elf32_arm_stub_hash_entry *stub_entry;
5522 unsigned int r_type;
5523 bfd_boolean sym_claimed = arm_stub_sym_claimed (stub_type);
5525 BFD_ASSERT (stub_type != arm_stub_none);
5529 stub_name = sym_name;
5533 BFD_ASSERT (section);
5534 BFD_ASSERT (section->id <= htab->top_id);
5536 /* Support for grouping stub sections. */
5537 id_sec = htab->stub_group[section->id].link_sec;
5539 /* Get the name of this stub. */
5540 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela,
5546 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name, FALSE,
5548 /* The proper stub has already been created, just update its value. */
5549 if (stub_entry != NULL)
5553 stub_entry->target_value = sym_value;
5557 stub_entry = elf32_arm_add_stub (stub_name, section, htab, stub_type);
5558 if (stub_entry == NULL)
5565 stub_entry->target_value = sym_value;
5566 stub_entry->target_section = sym_sec;
5567 stub_entry->stub_type = stub_type;
5568 stub_entry->h = hash;
5569 stub_entry->branch_type = branch_type;
5572 stub_entry->output_name = sym_name;
5575 if (sym_name == NULL)
5576 sym_name = "unnamed";
5577 stub_entry->output_name = (char *)
5578 bfd_alloc (htab->stub_bfd, sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
5579 + strlen (sym_name));
5580 if (stub_entry->output_name == NULL)
5586 /* For historical reasons, use the existing names for ARM-to-Thumb and
5587 Thumb-to-ARM stubs. */
5588 r_type = ELF32_R_TYPE (irela->r_info);
5589 if ((r_type == (unsigned int) R_ARM_THM_CALL
5590 || r_type == (unsigned int) R_ARM_THM_JUMP24
5591 || r_type == (unsigned int) R_ARM_THM_JUMP19)
5592 && branch_type == ST_BRANCH_TO_ARM)
5593 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME, sym_name);
5594 else if ((r_type == (unsigned int) R_ARM_CALL
5595 || r_type == (unsigned int) R_ARM_JUMP24)
5596 && branch_type == ST_BRANCH_TO_THUMB)
5597 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME, sym_name);
5599 sprintf (stub_entry->output_name, STUB_ENTRY_NAME, sym_name);
5606 /* Scan symbols in INPUT_BFD to identify secure entry functions needing a
5607 gateway veneer to transition from non secure to secure state and create them
5610 "ARMv8-M Security Extensions: Requirements on Development Tools" document
5611 defines the conditions that govern Secure Gateway veneer creation for a
5612 given symbol <SYM> as follows:
5613 - it has function type
5614 - it has non local binding
5615 - a symbol named __acle_se_<SYM> (called special symbol) exists with the
5616 same type, binding and value as <SYM> (called normal symbol).
5617 An entry function can handle secure state transition itself in which case
5618 its special symbol would have a different value from the normal symbol.
5620 OUT_ATTR gives the output attributes, SYM_HASHES the symbol index to hash
5621 entry mapping while HTAB gives the name to hash entry mapping.
5622 *CMSE_STUB_CREATED is increased by the number of secure gateway veneer
5625 The return value gives whether a stub failed to be allocated. */
5628 cmse_scan (bfd *input_bfd, struct elf32_arm_link_hash_table *htab,
5629 obj_attribute *out_attr, struct elf_link_hash_entry **sym_hashes,
5630 int *cmse_stub_created)
5632 const struct elf_backend_data *bed;
5633 Elf_Internal_Shdr *symtab_hdr;
5634 unsigned i, j, sym_count, ext_start;
5635 Elf_Internal_Sym *cmse_sym, *local_syms;
5636 struct elf32_arm_link_hash_entry *hash, *cmse_hash = NULL;
5637 enum arm_st_branch_type branch_type;
5638 char *sym_name, *lsym_name;
5641 struct elf32_arm_stub_hash_entry *stub_entry;
5642 bfd_boolean is_v8m, new_stub, cmse_invalid, ret = TRUE;
5644 bed = get_elf_backend_data (input_bfd);
5645 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5646 sym_count = symtab_hdr->sh_size / bed->s->sizeof_sym;
5647 ext_start = symtab_hdr->sh_info;
5648 is_v8m = (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V8M_BASE
5649 && out_attr[Tag_CPU_arch_profile].i == 'M');
5651 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
5652 if (local_syms == NULL)
5653 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
5654 symtab_hdr->sh_info, 0, NULL, NULL,
5656 if (symtab_hdr->sh_info && local_syms == NULL)
5660 for (i = 0; i < sym_count; i++)
5662 cmse_invalid = FALSE;
5666 cmse_sym = &local_syms[i];
5667 /* Not a special symbol. */
5668 if (!ARM_GET_SYM_CMSE_SPCL (cmse_sym->st_target_internal))
5670 sym_name = bfd_elf_string_from_elf_section (input_bfd,
5671 symtab_hdr->sh_link,
5673 /* Special symbol with local binding. */
5674 cmse_invalid = TRUE;
5678 cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]);
5679 sym_name = (char *) cmse_hash->root.root.root.string;
5681 /* Not a special symbol. */
5682 if (!ARM_GET_SYM_CMSE_SPCL (cmse_hash->root.target_internal))
5685 /* Special symbol has incorrect binding or type. */
5686 if ((cmse_hash->root.root.type != bfd_link_hash_defined
5687 && cmse_hash->root.root.type != bfd_link_hash_defweak)
5688 || cmse_hash->root.type != STT_FUNC)
5689 cmse_invalid = TRUE;
5694 (*_bfd_error_handler) (_("%B: Special symbol `%s' only allowed for "
5695 "ARMv8-M architecture or later."),
5696 input_bfd, sym_name);
5697 is_v8m = TRUE; /* Avoid multiple warning. */
5703 (*_bfd_error_handler) (_("%B: invalid special symbol `%s'."),
5704 input_bfd, sym_name);
5705 (*_bfd_error_handler) (_("It must be a global or weak function "
5712 sym_name += strlen (CMSE_PREFIX);
5713 hash = (struct elf32_arm_link_hash_entry *)
5714 elf_link_hash_lookup (&(htab)->root, sym_name, FALSE, FALSE, TRUE);
5716 /* No associated normal symbol or it is neither global nor weak. */
5718 || (hash->root.root.type != bfd_link_hash_defined
5719 && hash->root.root.type != bfd_link_hash_defweak)
5720 || hash->root.type != STT_FUNC)
5722 /* Initialize here to avoid warning about use of possibly
5723 uninitialized variable. */
5728 /* Searching for a normal symbol with local binding. */
5729 for (; j < ext_start; j++)
5732 bfd_elf_string_from_elf_section (input_bfd,
5733 symtab_hdr->sh_link,
5734 local_syms[j].st_name);
5735 if (!strcmp (sym_name, lsym_name))
5740 if (hash || j < ext_start)
5742 (*_bfd_error_handler)
5743 (_("%B: invalid standard symbol `%s'."), input_bfd, sym_name);
5744 (*_bfd_error_handler)
5745 (_("It must be a global or weak function symbol."));
5748 (*_bfd_error_handler)
5749 (_("%B: absent standard symbol `%s'."), input_bfd, sym_name);
5755 sym_value = hash->root.root.u.def.value;
5756 section = hash->root.root.u.def.section;
5758 if (cmse_hash->root.root.u.def.section != section)
5760 (*_bfd_error_handler)
5761 (_("%B: `%s' and its special symbol are in different sections."),
5762 input_bfd, sym_name);
5765 if (cmse_hash->root.root.u.def.value != sym_value)
5766 continue; /* Ignore: could be an entry function starting with SG. */
5768 /* If this section is a link-once section that will be discarded, then
5769 don't create any stubs. */
5770 if (section->output_section == NULL)
5772 (*_bfd_error_handler)
5773 (_("%B: entry function `%s' not output."), input_bfd, sym_name);
5777 if (hash->root.size == 0)
5779 (*_bfd_error_handler)
5780 (_("%B: entry function `%s' is empty."), input_bfd, sym_name);
5786 branch_type = ARM_GET_SYM_BRANCH_TYPE (hash->root.target_internal);
5788 = elf32_arm_create_stub (htab, arm_stub_cmse_branch_thumb_only,
5789 NULL, NULL, section, hash, sym_name,
5790 sym_value, branch_type, &new_stub);
5792 if (stub_entry == NULL)
5796 BFD_ASSERT (new_stub);
5797 (*cmse_stub_created)++;
5801 if (!symtab_hdr->contents)
5806 /* Return TRUE iff a symbol identified by its linker HASH entry is a secure
5807 code entry function, ie can be called from non secure code without using a
5811 cmse_entry_fct_p (struct elf32_arm_link_hash_entry *hash)
5813 bfd_byte contents[4];
5814 uint32_t first_insn;
5819 /* Defined symbol of function type. */
5820 if (hash->root.root.type != bfd_link_hash_defined
5821 && hash->root.root.type != bfd_link_hash_defweak)
5823 if (hash->root.type != STT_FUNC)
5826 /* Read first instruction. */
5827 section = hash->root.root.u.def.section;
5828 abfd = section->owner;
5829 offset = hash->root.root.u.def.value - section->vma;
5830 if (!bfd_get_section_contents (abfd, section, contents, offset,
5834 first_insn = bfd_get_32 (abfd, contents);
5836 /* Starts by SG instruction. */
5837 return first_insn == 0xe97fe97f;
5840 /* Output the name (in symbol table) of the veneer GEN_ENTRY if it is a new
5841 secure gateway veneers (ie. the veneers was not in the input import library)
5842 and there is no output import library (GEN_INFO->out_implib_bfd is NULL. */
5845 arm_list_new_cmse_stub (struct bfd_hash_entry *gen_entry, void *gen_info)
5847 struct elf32_arm_stub_hash_entry *stub_entry;
5848 struct bfd_link_info *info;
5850 /* Massage our args to the form they really have. */
5851 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
5852 info = (struct bfd_link_info *) gen_info;
5854 if (info->out_implib_bfd)
5857 if (stub_entry->stub_type != arm_stub_cmse_branch_thumb_only)
5860 if (stub_entry->stub_offset == (bfd_vma) -1)
5861 (*_bfd_error_handler) (" %s", stub_entry->output_name);
5866 /* Set offset of each secure gateway veneers so that its address remain
5867 identical to the one in the input import library referred by
5868 HTAB->in_implib_bfd. A warning is issued for veneers that disappeared
5869 (present in input import library but absent from the executable being
5870 linked) or if new veneers appeared and there is no output import library
5871 (INFO->out_implib_bfd is NULL and *CMSE_STUB_CREATED is bigger than the
5872 number of secure gateway veneers found in the input import library.
5874 The function returns whether an error occurred. If no error occurred,
5875 *CMSE_STUB_CREATED gives the number of SG veneers created by both cmse_scan
5876 and this function and HTAB->new_cmse_stub_offset is set to the biggest
5877 veneer observed set for new veneers to be layed out after. */
5880 set_cmse_veneer_addr_from_implib (struct bfd_link_info *info,
5881 struct elf32_arm_link_hash_table *htab,
5882 int *cmse_stub_created)
5889 asection *stub_out_sec;
5890 bfd_boolean ret = TRUE;
5891 Elf_Internal_Sym *intsym;
5892 const char *out_sec_name;
5893 bfd_size_type cmse_stub_size;
5894 asymbol **sympp = NULL, *sym;
5895 struct elf32_arm_link_hash_entry *hash;
5896 const insn_sequence *cmse_stub_template;
5897 struct elf32_arm_stub_hash_entry *stub_entry;
5898 int cmse_stub_template_size, new_cmse_stubs_created = *cmse_stub_created;
5899 bfd_vma veneer_value, stub_offset, next_cmse_stub_offset;
5900 bfd_vma cmse_stub_array_start = (bfd_vma) -1, cmse_stub_sec_vma = 0;
5902 /* No input secure gateway import library. */
5903 if (!htab->in_implib_bfd)
5906 in_implib_bfd = htab->in_implib_bfd;
5907 if (!htab->cmse_implib)
5909 (*_bfd_error_handler) (_("%B: --in-implib only supported for Secure "
5910 "Gateway import libraries."), in_implib_bfd);
5914 /* Get symbol table size. */
5915 symsize = bfd_get_symtab_upper_bound (in_implib_bfd);
5919 /* Read in the input secure gateway import library's symbol table. */
5920 sympp = (asymbol **) xmalloc (symsize);
5921 symcount = bfd_canonicalize_symtab (in_implib_bfd, sympp);
5928 htab->new_cmse_stub_offset = 0;
5930 find_stub_size_and_template (arm_stub_cmse_branch_thumb_only,
5931 &cmse_stub_template,
5932 &cmse_stub_template_size);
5934 arm_dedicated_stub_output_section_name (arm_stub_cmse_branch_thumb_only);
5936 bfd_get_section_by_name (htab->obfd, out_sec_name);
5937 if (stub_out_sec != NULL)
5938 cmse_stub_sec_vma = stub_out_sec->vma;
5940 /* Set addresses of veneers mentionned in input secure gateway import
5941 library's symbol table. */
5942 for (i = 0; i < symcount; i++)
5946 sym_name = (char *) bfd_asymbol_name (sym);
5947 intsym = &((elf_symbol_type *) sym)->internal_elf_sym;
5949 if (sym->section != bfd_abs_section_ptr
5950 || !(flags & (BSF_GLOBAL | BSF_WEAK))
5951 || (flags & BSF_FUNCTION) != BSF_FUNCTION
5952 || (ARM_GET_SYM_BRANCH_TYPE (intsym->st_target_internal)
5953 != ST_BRANCH_TO_THUMB))
5955 (*_bfd_error_handler) (_("%B: invalid import library entry: `%s'."),
5956 in_implib_bfd, sym_name);
5957 (*_bfd_error_handler) (_("Symbol should be absolute, global and "
5958 "refer to Thumb functions."));
5963 veneer_value = bfd_asymbol_value (sym);
5964 stub_offset = veneer_value - cmse_stub_sec_vma;
5965 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, sym_name,
5967 hash = (struct elf32_arm_link_hash_entry *)
5968 elf_link_hash_lookup (&(htab)->root, sym_name, FALSE, FALSE, TRUE);
5970 /* Stub entry should have been created by cmse_scan or the symbol be of
5971 a secure function callable from non secure code. */
5972 if (!stub_entry && !hash)
5974 bfd_boolean new_stub;
5976 (*_bfd_error_handler)
5977 (_("Entry function `%s' disappeared from secure code."), sym_name);
5978 hash = (struct elf32_arm_link_hash_entry *)
5979 elf_link_hash_lookup (&(htab)->root, sym_name, TRUE, TRUE, TRUE);
5981 = elf32_arm_create_stub (htab, arm_stub_cmse_branch_thumb_only,
5982 NULL, NULL, bfd_abs_section_ptr, hash,
5983 sym_name, veneer_value,
5984 ST_BRANCH_TO_THUMB, &new_stub);
5985 if (stub_entry == NULL)
5989 BFD_ASSERT (new_stub);
5990 new_cmse_stubs_created++;
5991 (*cmse_stub_created)++;
5993 stub_entry->stub_template_size = stub_entry->stub_size = 0;
5994 stub_entry->stub_offset = stub_offset;
5996 /* Symbol found is not callable from non secure code. */
5997 else if (!stub_entry)
5999 if (!cmse_entry_fct_p (hash))
6001 (*_bfd_error_handler) (_("`%s' refers to a non entry function."),
6009 /* Only stubs for SG veneers should have been created. */
6010 BFD_ASSERT (stub_entry->stub_type == arm_stub_cmse_branch_thumb_only);
6012 /* Check visibility hasn't changed. */
6013 if (!!(flags & BSF_GLOBAL)
6014 != (hash->root.root.type == bfd_link_hash_defined))
6015 (*_bfd_error_handler)
6016 (_("%B: visibility of symbol `%s' has changed."), in_implib_bfd,
6019 stub_entry->stub_offset = stub_offset;
6022 /* Size should match that of a SG veneer. */
6023 if (intsym->st_size != cmse_stub_size)
6025 (*_bfd_error_handler) (_("%B: incorrect size for symbol `%s'."),
6026 in_implib_bfd, sym_name);
6030 /* Previous veneer address is before current SG veneer section. */
6031 if (veneer_value < cmse_stub_sec_vma)
6033 /* Avoid offset underflow. */
6035 stub_entry->stub_offset = 0;
6040 /* Complain if stub offset not a multiple of stub size. */
6041 if (stub_offset % cmse_stub_size)
6043 (*_bfd_error_handler)
6044 (_("Offset of veneer for entry function `%s' not a multiple of "
6045 "its size."), sym_name);
6052 new_cmse_stubs_created--;
6053 if (veneer_value < cmse_stub_array_start)
6054 cmse_stub_array_start = veneer_value;
6055 next_cmse_stub_offset = stub_offset + ((cmse_stub_size + 7) & ~7);
6056 if (next_cmse_stub_offset > htab->new_cmse_stub_offset)
6057 htab->new_cmse_stub_offset = next_cmse_stub_offset;
6060 if (!info->out_implib_bfd && new_cmse_stubs_created != 0)
6062 BFD_ASSERT (new_cmse_stubs_created > 0);
6063 (*_bfd_error_handler)
6064 (_("new entry function(s) introduced but no output import library "
6066 bfd_hash_traverse (&htab->stub_hash_table, arm_list_new_cmse_stub, info);
6069 if (cmse_stub_array_start != cmse_stub_sec_vma)
6071 (*_bfd_error_handler)
6072 (_("Start address of `%s' is different from previous link."),
6082 /* Determine and set the size of the stub section for a final link.
6084 The basic idea here is to examine all the relocations looking for
6085 PC-relative calls to a target that is unreachable with a "bl"
6089 elf32_arm_size_stubs (bfd *output_bfd,
6091 struct bfd_link_info *info,
6092 bfd_signed_vma group_size,
6093 asection * (*add_stub_section) (const char *, asection *,
6096 void (*layout_sections_again) (void))
6098 bfd_boolean ret = TRUE;
6099 obj_attribute *out_attr;
6100 int cmse_stub_created = 0;
6101 bfd_size_type stub_group_size;
6102 bfd_boolean m_profile, stubs_always_after_branch, first_veneer_scan = TRUE;
6103 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
6104 struct a8_erratum_fix *a8_fixes = NULL;
6105 unsigned int num_a8_fixes = 0, a8_fix_table_size = 10;
6106 struct a8_erratum_reloc *a8_relocs = NULL;
6107 unsigned int num_a8_relocs = 0, a8_reloc_table_size = 10, i;
6112 if (htab->fix_cortex_a8)
6114 a8_fixes = (struct a8_erratum_fix *)
6115 bfd_zmalloc (sizeof (struct a8_erratum_fix) * a8_fix_table_size);
6116 a8_relocs = (struct a8_erratum_reloc *)
6117 bfd_zmalloc (sizeof (struct a8_erratum_reloc) * a8_reloc_table_size);
6120 /* Propagate mach to stub bfd, because it may not have been
6121 finalized when we created stub_bfd. */
6122 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
6123 bfd_get_mach (output_bfd));
6125 /* Stash our params away. */
6126 htab->stub_bfd = stub_bfd;
6127 htab->add_stub_section = add_stub_section;
6128 htab->layout_sections_again = layout_sections_again;
6129 stubs_always_after_branch = group_size < 0;
6131 out_attr = elf_known_obj_attributes_proc (output_bfd);
6132 m_profile = out_attr[Tag_CPU_arch_profile].i == 'M';
6134 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
6135 as the first half of a 32-bit branch straddling two 4K pages. This is a
6136 crude way of enforcing that. */
6137 if (htab->fix_cortex_a8)
6138 stubs_always_after_branch = 1;
6141 stub_group_size = -group_size;
6143 stub_group_size = group_size;
6145 if (stub_group_size == 1)
6147 /* Default values. */
6148 /* Thumb branch range is +-4MB has to be used as the default
6149 maximum size (a given section can contain both ARM and Thumb
6150 code, so the worst case has to be taken into account).
6152 This value is 24K less than that, which allows for 2025
6153 12-byte stubs. If we exceed that, then we will fail to link.
6154 The user will have to relink with an explicit group size
6156 stub_group_size = 4170000;
6159 group_sections (htab, stub_group_size, stubs_always_after_branch);
6161 /* If we're applying the cortex A8 fix, we need to determine the
6162 program header size now, because we cannot change it later --
6163 that could alter section placements. Notice the A8 erratum fix
6164 ends up requiring the section addresses to remain unchanged
6165 modulo the page size. That's something we cannot represent
6166 inside BFD, and we don't want to force the section alignment to
6167 be the page size. */
6168 if (htab->fix_cortex_a8)
6169 (*htab->layout_sections_again) ();
6174 unsigned int bfd_indx;
6176 enum elf32_arm_stub_type stub_type;
6177 bfd_boolean stub_changed = FALSE;
6178 unsigned prev_num_a8_fixes = num_a8_fixes;
6181 for (input_bfd = info->input_bfds, bfd_indx = 0;
6183 input_bfd = input_bfd->link.next, bfd_indx++)
6185 Elf_Internal_Shdr *symtab_hdr;
6187 Elf_Internal_Sym *local_syms = NULL;
6189 if (!is_arm_elf (input_bfd))
6194 /* We'll need the symbol table in a second. */
6195 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6196 if (symtab_hdr->sh_info == 0)
6199 /* Limit scan of symbols to object file whose profile is
6200 Microcontroller to not hinder performance in the general case. */
6201 if (m_profile && first_veneer_scan)
6203 struct elf_link_hash_entry **sym_hashes;
6205 sym_hashes = elf_sym_hashes (input_bfd);
6206 if (!cmse_scan (input_bfd, htab, out_attr, sym_hashes,
6207 &cmse_stub_created))
6208 goto error_ret_free_local;
6210 if (cmse_stub_created != 0)
6211 stub_changed = TRUE;
6214 /* Walk over each section attached to the input bfd. */
6215 for (section = input_bfd->sections;
6217 section = section->next)
6219 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6221 /* If there aren't any relocs, then there's nothing more
6223 if ((section->flags & SEC_RELOC) == 0
6224 || section->reloc_count == 0
6225 || (section->flags & SEC_CODE) == 0)
6228 /* If this section is a link-once section that will be
6229 discarded, then don't create any stubs. */
6230 if (section->output_section == NULL
6231 || section->output_section->owner != output_bfd)
6234 /* Get the relocs. */
6236 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
6237 NULL, info->keep_memory);
6238 if (internal_relocs == NULL)
6239 goto error_ret_free_local;
6241 /* Now examine each relocation. */
6242 irela = internal_relocs;
6243 irelaend = irela + section->reloc_count;
6244 for (; irela < irelaend; irela++)
6246 unsigned int r_type, r_indx;
6249 bfd_vma destination;
6250 struct elf32_arm_link_hash_entry *hash;
6251 const char *sym_name;
6252 unsigned char st_type;
6253 enum arm_st_branch_type branch_type;
6254 bfd_boolean created_stub = FALSE;
6256 r_type = ELF32_R_TYPE (irela->r_info);
6257 r_indx = ELF32_R_SYM (irela->r_info);
6259 if (r_type >= (unsigned int) R_ARM_max)
6261 bfd_set_error (bfd_error_bad_value);
6262 error_ret_free_internal:
6263 if (elf_section_data (section)->relocs == NULL)
6264 free (internal_relocs);
6266 error_ret_free_local:
6267 if (local_syms != NULL
6268 && (symtab_hdr->contents
6269 != (unsigned char *) local_syms))
6275 if (r_indx >= symtab_hdr->sh_info)
6276 hash = elf32_arm_hash_entry
6277 (elf_sym_hashes (input_bfd)
6278 [r_indx - symtab_hdr->sh_info]);
6280 /* Only look for stubs on branch instructions, or
6281 non-relaxed TLSCALL */
6282 if ((r_type != (unsigned int) R_ARM_CALL)
6283 && (r_type != (unsigned int) R_ARM_THM_CALL)
6284 && (r_type != (unsigned int) R_ARM_JUMP24)
6285 && (r_type != (unsigned int) R_ARM_THM_JUMP19)
6286 && (r_type != (unsigned int) R_ARM_THM_XPC22)
6287 && (r_type != (unsigned int) R_ARM_THM_JUMP24)
6288 && (r_type != (unsigned int) R_ARM_PLT32)
6289 && !((r_type == (unsigned int) R_ARM_TLS_CALL
6290 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
6291 && r_type == elf32_arm_tls_transition
6292 (info, r_type, &hash->root)
6293 && ((hash ? hash->tls_type
6294 : (elf32_arm_local_got_tls_type
6295 (input_bfd)[r_indx]))
6296 & GOT_TLS_GDESC) != 0))
6299 /* Now determine the call target, its name, value,
6306 if (r_type == (unsigned int) R_ARM_TLS_CALL
6307 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
6309 /* A non-relaxed TLS call. The target is the
6310 plt-resident trampoline and nothing to do
6312 BFD_ASSERT (htab->tls_trampoline > 0);
6313 sym_sec = htab->root.splt;
6314 sym_value = htab->tls_trampoline;
6317 branch_type = ST_BRANCH_TO_ARM;
6321 /* It's a local symbol. */
6322 Elf_Internal_Sym *sym;
6324 if (local_syms == NULL)
6327 = (Elf_Internal_Sym *) symtab_hdr->contents;
6328 if (local_syms == NULL)
6330 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
6331 symtab_hdr->sh_info, 0,
6333 if (local_syms == NULL)
6334 goto error_ret_free_internal;
6337 sym = local_syms + r_indx;
6338 if (sym->st_shndx == SHN_UNDEF)
6339 sym_sec = bfd_und_section_ptr;
6340 else if (sym->st_shndx == SHN_ABS)
6341 sym_sec = bfd_abs_section_ptr;
6342 else if (sym->st_shndx == SHN_COMMON)
6343 sym_sec = bfd_com_section_ptr;
6346 bfd_section_from_elf_index (input_bfd, sym->st_shndx);
6349 /* This is an undefined symbol. It can never
6353 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
6354 sym_value = sym->st_value;
6355 destination = (sym_value + irela->r_addend
6356 + sym_sec->output_offset
6357 + sym_sec->output_section->vma);
6358 st_type = ELF_ST_TYPE (sym->st_info);
6360 ARM_GET_SYM_BRANCH_TYPE (sym->st_target_internal);
6362 = bfd_elf_string_from_elf_section (input_bfd,
6363 symtab_hdr->sh_link,
6368 /* It's an external symbol. */
6369 while (hash->root.root.type == bfd_link_hash_indirect
6370 || hash->root.root.type == bfd_link_hash_warning)
6371 hash = ((struct elf32_arm_link_hash_entry *)
6372 hash->root.root.u.i.link);
6374 if (hash->root.root.type == bfd_link_hash_defined
6375 || hash->root.root.type == bfd_link_hash_defweak)
6377 sym_sec = hash->root.root.u.def.section;
6378 sym_value = hash->root.root.u.def.value;
6380 struct elf32_arm_link_hash_table *globals =
6381 elf32_arm_hash_table (info);
6383 /* For a destination in a shared library,
6384 use the PLT stub as target address to
6385 decide whether a branch stub is
6388 && globals->root.splt != NULL
6390 && hash->root.plt.offset != (bfd_vma) -1)
6392 sym_sec = globals->root.splt;
6393 sym_value = hash->root.plt.offset;
6394 if (sym_sec->output_section != NULL)
6395 destination = (sym_value
6396 + sym_sec->output_offset
6397 + sym_sec->output_section->vma);
6399 else if (sym_sec->output_section != NULL)
6400 destination = (sym_value + irela->r_addend
6401 + sym_sec->output_offset
6402 + sym_sec->output_section->vma);
6404 else if ((hash->root.root.type == bfd_link_hash_undefined)
6405 || (hash->root.root.type == bfd_link_hash_undefweak))
6407 /* For a shared library, use the PLT stub as
6408 target address to decide whether a long
6409 branch stub is needed.
6410 For absolute code, they cannot be handled. */
6411 struct elf32_arm_link_hash_table *globals =
6412 elf32_arm_hash_table (info);
6415 && globals->root.splt != NULL
6417 && hash->root.plt.offset != (bfd_vma) -1)
6419 sym_sec = globals->root.splt;
6420 sym_value = hash->root.plt.offset;
6421 if (sym_sec->output_section != NULL)
6422 destination = (sym_value
6423 + sym_sec->output_offset
6424 + sym_sec->output_section->vma);
6431 bfd_set_error (bfd_error_bad_value);
6432 goto error_ret_free_internal;
6434 st_type = hash->root.type;
6436 ARM_GET_SYM_BRANCH_TYPE (hash->root.target_internal);
6437 sym_name = hash->root.root.root.string;
6442 bfd_boolean new_stub;
6443 struct elf32_arm_stub_hash_entry *stub_entry;
6445 /* Determine what (if any) linker stub is needed. */
6446 stub_type = arm_type_of_stub (info, section, irela,
6447 st_type, &branch_type,
6448 hash, destination, sym_sec,
6449 input_bfd, sym_name);
6450 if (stub_type == arm_stub_none)
6453 /* We've either created a stub for this reloc already,
6454 or we are about to. */
6456 elf32_arm_create_stub (htab, stub_type, section, irela,
6458 (char *) sym_name, sym_value,
6459 branch_type, &new_stub);
6461 created_stub = stub_entry != NULL;
6463 goto error_ret_free_internal;
6467 stub_changed = TRUE;
6471 /* Look for relocations which might trigger Cortex-A8
6473 if (htab->fix_cortex_a8
6474 && (r_type == (unsigned int) R_ARM_THM_JUMP24
6475 || r_type == (unsigned int) R_ARM_THM_JUMP19
6476 || r_type == (unsigned int) R_ARM_THM_CALL
6477 || r_type == (unsigned int) R_ARM_THM_XPC22))
6479 bfd_vma from = section->output_section->vma
6480 + section->output_offset
6483 if ((from & 0xfff) == 0xffe)
6485 /* Found a candidate. Note we haven't checked the
6486 destination is within 4K here: if we do so (and
6487 don't create an entry in a8_relocs) we can't tell
6488 that a branch should have been relocated when
6490 if (num_a8_relocs == a8_reloc_table_size)
6492 a8_reloc_table_size *= 2;
6493 a8_relocs = (struct a8_erratum_reloc *)
6494 bfd_realloc (a8_relocs,
6495 sizeof (struct a8_erratum_reloc)
6496 * a8_reloc_table_size);
6499 a8_relocs[num_a8_relocs].from = from;
6500 a8_relocs[num_a8_relocs].destination = destination;
6501 a8_relocs[num_a8_relocs].r_type = r_type;
6502 a8_relocs[num_a8_relocs].branch_type = branch_type;
6503 a8_relocs[num_a8_relocs].sym_name = sym_name;
6504 a8_relocs[num_a8_relocs].non_a8_stub = created_stub;
6505 a8_relocs[num_a8_relocs].hash = hash;
6512 /* We're done with the internal relocs, free them. */
6513 if (elf_section_data (section)->relocs == NULL)
6514 free (internal_relocs);
6517 if (htab->fix_cortex_a8)
6519 /* Sort relocs which might apply to Cortex-A8 erratum. */
6520 qsort (a8_relocs, num_a8_relocs,
6521 sizeof (struct a8_erratum_reloc),
6524 /* Scan for branches which might trigger Cortex-A8 erratum. */
6525 if (cortex_a8_erratum_scan (input_bfd, info, &a8_fixes,
6526 &num_a8_fixes, &a8_fix_table_size,
6527 a8_relocs, num_a8_relocs,
6528 prev_num_a8_fixes, &stub_changed)
6530 goto error_ret_free_local;
6533 if (local_syms != NULL
6534 && symtab_hdr->contents != (unsigned char *) local_syms)
6536 if (!info->keep_memory)
6539 symtab_hdr->contents = (unsigned char *) local_syms;
6543 if (first_veneer_scan
6544 && !set_cmse_veneer_addr_from_implib (info, htab,
6545 &cmse_stub_created))
6548 if (prev_num_a8_fixes != num_a8_fixes)
6549 stub_changed = TRUE;
6554 /* OK, we've added some stubs. Find out the new size of the
6556 for (stub_sec = htab->stub_bfd->sections;
6558 stub_sec = stub_sec->next)
6560 /* Ignore non-stub sections. */
6561 if (!strstr (stub_sec->name, STUB_SUFFIX))
6567 /* Add new SG veneers after those already in the input import
6569 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type;
6572 bfd_vma *start_offset_p;
6573 asection **stub_sec_p;
6575 start_offset_p = arm_new_stubs_start_offset_ptr (htab, stub_type);
6576 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
6577 if (start_offset_p == NULL)
6580 BFD_ASSERT (stub_sec_p != NULL);
6581 if (*stub_sec_p != NULL)
6582 (*stub_sec_p)->size = *start_offset_p;
6585 /* Compute stub section size, considering padding. */
6586 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
6587 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type;
6591 asection **stub_sec_p;
6593 padding = arm_dedicated_stub_section_padding (stub_type);
6594 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
6595 /* Skip if no stub input section or no stub section padding
6597 if ((stub_sec_p != NULL && *stub_sec_p == NULL) || padding == 0)
6599 /* Stub section padding required but no dedicated section. */
6600 BFD_ASSERT (stub_sec_p);
6602 size = (*stub_sec_p)->size;
6603 size = (size + padding - 1) & ~(padding - 1);
6604 (*stub_sec_p)->size = size;
6607 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
6608 if (htab->fix_cortex_a8)
6609 for (i = 0; i < num_a8_fixes; i++)
6611 stub_sec = elf32_arm_create_or_find_stub_sec (NULL,
6612 a8_fixes[i].section, htab, a8_fixes[i].stub_type);
6614 if (stub_sec == NULL)
6618 += find_stub_size_and_template (a8_fixes[i].stub_type, NULL,
6623 /* Ask the linker to do its stuff. */
6624 (*htab->layout_sections_again) ();
6625 first_veneer_scan = FALSE;
6628 /* Add stubs for Cortex-A8 erratum fixes now. */
6629 if (htab->fix_cortex_a8)
6631 for (i = 0; i < num_a8_fixes; i++)
6633 struct elf32_arm_stub_hash_entry *stub_entry;
6634 char *stub_name = a8_fixes[i].stub_name;
6635 asection *section = a8_fixes[i].section;
6636 unsigned int section_id = a8_fixes[i].section->id;
6637 asection *link_sec = htab->stub_group[section_id].link_sec;
6638 asection *stub_sec = htab->stub_group[section_id].stub_sec;
6639 const insn_sequence *template_sequence;
6640 int template_size, size = 0;
6642 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
6644 if (stub_entry == NULL)
6646 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
6652 stub_entry->stub_sec = stub_sec;
6653 stub_entry->stub_offset = (bfd_vma) -1;
6654 stub_entry->id_sec = link_sec;
6655 stub_entry->stub_type = a8_fixes[i].stub_type;
6656 stub_entry->source_value = a8_fixes[i].offset;
6657 stub_entry->target_section = a8_fixes[i].section;
6658 stub_entry->target_value = a8_fixes[i].target_offset;
6659 stub_entry->orig_insn = a8_fixes[i].orig_insn;
6660 stub_entry->branch_type = a8_fixes[i].branch_type;
6662 size = find_stub_size_and_template (a8_fixes[i].stub_type,
6666 stub_entry->stub_size = size;
6667 stub_entry->stub_template = template_sequence;
6668 stub_entry->stub_template_size = template_size;
6671 /* Stash the Cortex-A8 erratum fix array for use later in
6672 elf32_arm_write_section(). */
6673 htab->a8_erratum_fixes = a8_fixes;
6674 htab->num_a8_erratum_fixes = num_a8_fixes;
6678 htab->a8_erratum_fixes = NULL;
6679 htab->num_a8_erratum_fixes = 0;
6684 /* Build all the stubs associated with the current output file. The
6685 stubs are kept in a hash table attached to the main linker hash
6686 table. We also set up the .plt entries for statically linked PIC
6687 functions here. This function is called via arm_elf_finish in the
6691 elf32_arm_build_stubs (struct bfd_link_info *info)
6694 struct bfd_hash_table *table;
6695 enum elf32_arm_stub_type stub_type;
6696 struct elf32_arm_link_hash_table *htab;
6698 htab = elf32_arm_hash_table (info);
6702 for (stub_sec = htab->stub_bfd->sections;
6704 stub_sec = stub_sec->next)
6708 /* Ignore non-stub sections. */
6709 if (!strstr (stub_sec->name, STUB_SUFFIX))
6712 /* Allocate memory to hold the linker stubs. Zeroing the stub sections
6713 must at least be done for stub section requiring padding and for SG
6714 veneers to ensure that a non secure code branching to a removed SG
6715 veneer causes an error. */
6716 size = stub_sec->size;
6717 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
6718 if (stub_sec->contents == NULL && size != 0)
6724 /* Add new SG veneers after those already in the input import library. */
6725 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type; stub_type++)
6727 bfd_vma *start_offset_p;
6728 asection **stub_sec_p;
6730 start_offset_p = arm_new_stubs_start_offset_ptr (htab, stub_type);
6731 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
6732 if (start_offset_p == NULL)
6735 BFD_ASSERT (stub_sec_p != NULL);
6736 if (*stub_sec_p != NULL)
6737 (*stub_sec_p)->size = *start_offset_p;
6740 /* Build the stubs as directed by the stub hash table. */
6741 table = &htab->stub_hash_table;
6742 bfd_hash_traverse (table, arm_build_one_stub, info);
6743 if (htab->fix_cortex_a8)
6745 /* Place the cortex a8 stubs last. */
6746 htab->fix_cortex_a8 = -1;
6747 bfd_hash_traverse (table, arm_build_one_stub, info);
6753 /* Locate the Thumb encoded calling stub for NAME. */
6755 static struct elf_link_hash_entry *
6756 find_thumb_glue (struct bfd_link_info *link_info,
6758 char **error_message)
6761 struct elf_link_hash_entry *hash;
6762 struct elf32_arm_link_hash_table *hash_table;
6764 /* We need a pointer to the armelf specific hash table. */
6765 hash_table = elf32_arm_hash_table (link_info);
6766 if (hash_table == NULL)
6769 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
6770 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
6772 BFD_ASSERT (tmp_name);
6774 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
6776 hash = elf_link_hash_lookup
6777 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
6780 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
6781 tmp_name, name) == -1)
6782 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
6789 /* Locate the ARM encoded calling stub for NAME. */
6791 static struct elf_link_hash_entry *
6792 find_arm_glue (struct bfd_link_info *link_info,
6794 char **error_message)
6797 struct elf_link_hash_entry *myh;
6798 struct elf32_arm_link_hash_table *hash_table;
6800 /* We need a pointer to the elfarm specific hash table. */
6801 hash_table = elf32_arm_hash_table (link_info);
6802 if (hash_table == NULL)
6805 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
6806 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
6808 BFD_ASSERT (tmp_name);
6810 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
6812 myh = elf_link_hash_lookup
6813 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
6816 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
6817 tmp_name, name) == -1)
6818 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
6825 /* ARM->Thumb glue (static images):
6829 ldr r12, __func_addr
6832 .word func @ behave as if you saw a ARM_32 reloc.
6839 .word func @ behave as if you saw a ARM_32 reloc.
6841 (relocatable images)
6844 ldr r12, __func_offset
6850 #define ARM2THUMB_STATIC_GLUE_SIZE 12
6851 static const insn32 a2t1_ldr_insn = 0xe59fc000;
6852 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
6853 static const insn32 a2t3_func_addr_insn = 0x00000001;
6855 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
6856 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
6857 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
6859 #define ARM2THUMB_PIC_GLUE_SIZE 16
6860 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
6861 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
6862 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
6864 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
6868 __func_from_thumb: __func_from_thumb:
6870 nop ldr r6, __func_addr
6880 #define THUMB2ARM_GLUE_SIZE 8
6881 static const insn16 t2a1_bx_pc_insn = 0x4778;
6882 static const insn16 t2a2_noop_insn = 0x46c0;
6883 static const insn32 t2a3_b_insn = 0xea000000;
6885 #define VFP11_ERRATUM_VENEER_SIZE 8
6886 #define STM32L4XX_ERRATUM_LDM_VENEER_SIZE 16
6887 #define STM32L4XX_ERRATUM_VLDM_VENEER_SIZE 24
6889 #define ARM_BX_VENEER_SIZE 12
6890 static const insn32 armbx1_tst_insn = 0xe3100001;
6891 static const insn32 armbx2_moveq_insn = 0x01a0f000;
6892 static const insn32 armbx3_bx_insn = 0xe12fff10;
6894 #ifndef ELFARM_NABI_C_INCLUDED
6896 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
6899 bfd_byte * contents;
6903 /* Do not include empty glue sections in the output. */
6906 s = bfd_get_linker_section (abfd, name);
6908 s->flags |= SEC_EXCLUDE;
6913 BFD_ASSERT (abfd != NULL);
6915 s = bfd_get_linker_section (abfd, name);
6916 BFD_ASSERT (s != NULL);
6918 contents = (bfd_byte *) bfd_alloc (abfd, size);
6920 BFD_ASSERT (s->size == size);
6921 s->contents = contents;
6925 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
6927 struct elf32_arm_link_hash_table * globals;
6929 globals = elf32_arm_hash_table (info);
6930 BFD_ASSERT (globals != NULL);
6932 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6933 globals->arm_glue_size,
6934 ARM2THUMB_GLUE_SECTION_NAME);
6936 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6937 globals->thumb_glue_size,
6938 THUMB2ARM_GLUE_SECTION_NAME);
6940 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6941 globals->vfp11_erratum_glue_size,
6942 VFP11_ERRATUM_VENEER_SECTION_NAME);
6944 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6945 globals->stm32l4xx_erratum_glue_size,
6946 STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
6948 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6949 globals->bx_glue_size,
6950 ARM_BX_GLUE_SECTION_NAME);
6955 /* Allocate space and symbols for calling a Thumb function from Arm mode.
6956 returns the symbol identifying the stub. */
6958 static struct elf_link_hash_entry *
6959 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
6960 struct elf_link_hash_entry * h)
6962 const char * name = h->root.root.string;
6965 struct elf_link_hash_entry * myh;
6966 struct bfd_link_hash_entry * bh;
6967 struct elf32_arm_link_hash_table * globals;
6971 globals = elf32_arm_hash_table (link_info);
6972 BFD_ASSERT (globals != NULL);
6973 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6975 s = bfd_get_linker_section
6976 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
6978 BFD_ASSERT (s != NULL);
6980 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
6981 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
6983 BFD_ASSERT (tmp_name);
6985 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
6987 myh = elf_link_hash_lookup
6988 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
6992 /* We've already seen this guy. */
6997 /* The only trick here is using hash_table->arm_glue_size as the value.
6998 Even though the section isn't allocated yet, this is where we will be
6999 putting it. The +1 on the value marks that the stub has not been
7000 output yet - not that it is a Thumb function. */
7002 val = globals->arm_glue_size + 1;
7003 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
7004 tmp_name, BSF_GLOBAL, s, val,
7005 NULL, TRUE, FALSE, &bh);
7007 myh = (struct elf_link_hash_entry *) bh;
7008 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7009 myh->forced_local = 1;
7013 if (bfd_link_pic (link_info)
7014 || globals->root.is_relocatable_executable
7015 || globals->pic_veneer)
7016 size = ARM2THUMB_PIC_GLUE_SIZE;
7017 else if (globals->use_blx)
7018 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
7020 size = ARM2THUMB_STATIC_GLUE_SIZE;
7023 globals->arm_glue_size += size;
7028 /* Allocate space for ARMv4 BX veneers. */
7031 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
7034 struct elf32_arm_link_hash_table *globals;
7036 struct elf_link_hash_entry *myh;
7037 struct bfd_link_hash_entry *bh;
7040 /* BX PC does not need a veneer. */
7044 globals = elf32_arm_hash_table (link_info);
7045 BFD_ASSERT (globals != NULL);
7046 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
7048 /* Check if this veneer has already been allocated. */
7049 if (globals->bx_glue_offset[reg])
7052 s = bfd_get_linker_section
7053 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
7055 BFD_ASSERT (s != NULL);
7057 /* Add symbol for veneer. */
7059 bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
7061 BFD_ASSERT (tmp_name);
7063 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
7065 myh = elf_link_hash_lookup
7066 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
7068 BFD_ASSERT (myh == NULL);
7071 val = globals->bx_glue_size;
7072 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
7073 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
7074 NULL, TRUE, FALSE, &bh);
7076 myh = (struct elf_link_hash_entry *) bh;
7077 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7078 myh->forced_local = 1;
7080 s->size += ARM_BX_VENEER_SIZE;
7081 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
7082 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
7086 /* Add an entry to the code/data map for section SEC. */
7089 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
7091 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
7092 unsigned int newidx;
7094 if (sec_data->map == NULL)
7096 sec_data->map = (elf32_arm_section_map *)
7097 bfd_malloc (sizeof (elf32_arm_section_map));
7098 sec_data->mapcount = 0;
7099 sec_data->mapsize = 1;
7102 newidx = sec_data->mapcount++;
7104 if (sec_data->mapcount > sec_data->mapsize)
7106 sec_data->mapsize *= 2;
7107 sec_data->map = (elf32_arm_section_map *)
7108 bfd_realloc_or_free (sec_data->map, sec_data->mapsize
7109 * sizeof (elf32_arm_section_map));
7114 sec_data->map[newidx].vma = vma;
7115 sec_data->map[newidx].type = type;
7120 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
7121 veneers are handled for now. */
7124 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
7125 elf32_vfp11_erratum_list *branch,
7127 asection *branch_sec,
7128 unsigned int offset)
7131 struct elf32_arm_link_hash_table *hash_table;
7133 struct elf_link_hash_entry *myh;
7134 struct bfd_link_hash_entry *bh;
7136 struct _arm_elf_section_data *sec_data;
7137 elf32_vfp11_erratum_list *newerr;
7139 hash_table = elf32_arm_hash_table (link_info);
7140 BFD_ASSERT (hash_table != NULL);
7141 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
7143 s = bfd_get_linker_section
7144 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
7146 sec_data = elf32_arm_section_data (s);
7148 BFD_ASSERT (s != NULL);
7150 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7151 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
7153 BFD_ASSERT (tmp_name);
7155 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
7156 hash_table->num_vfp11_fixes);
7158 myh = elf_link_hash_lookup
7159 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
7161 BFD_ASSERT (myh == NULL);
7164 val = hash_table->vfp11_erratum_glue_size;
7165 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
7166 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
7167 NULL, TRUE, FALSE, &bh);
7169 myh = (struct elf_link_hash_entry *) bh;
7170 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7171 myh->forced_local = 1;
7173 /* Link veneer back to calling location. */
7174 sec_data->erratumcount += 1;
7175 newerr = (elf32_vfp11_erratum_list *)
7176 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
7178 newerr->type = VFP11_ERRATUM_ARM_VENEER;
7180 newerr->u.v.branch = branch;
7181 newerr->u.v.id = hash_table->num_vfp11_fixes;
7182 branch->u.b.veneer = newerr;
7184 newerr->next = sec_data->erratumlist;
7185 sec_data->erratumlist = newerr;
7187 /* A symbol for the return from the veneer. */
7188 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
7189 hash_table->num_vfp11_fixes);
7191 myh = elf_link_hash_lookup
7192 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
7199 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
7200 branch_sec, val, NULL, TRUE, FALSE, &bh);
7202 myh = (struct elf_link_hash_entry *) bh;
7203 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7204 myh->forced_local = 1;
7208 /* Generate a mapping symbol for the veneer section, and explicitly add an
7209 entry for that symbol to the code/data map for the section. */
7210 if (hash_table->vfp11_erratum_glue_size == 0)
7213 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
7214 ever requires this erratum fix. */
7215 _bfd_generic_link_add_one_symbol (link_info,
7216 hash_table->bfd_of_glue_owner, "$a",
7217 BSF_LOCAL, s, 0, NULL,
7220 myh = (struct elf_link_hash_entry *) bh;
7221 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7222 myh->forced_local = 1;
7224 /* The elf32_arm_init_maps function only cares about symbols from input
7225 BFDs. We must make a note of this generated mapping symbol
7226 ourselves so that code byteswapping works properly in
7227 elf32_arm_write_section. */
7228 elf32_arm_section_map_add (s, 'a', 0);
7231 s->size += VFP11_ERRATUM_VENEER_SIZE;
7232 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
7233 hash_table->num_vfp11_fixes++;
7235 /* The offset of the veneer. */
7239 /* Record information about a STM32L4XX STM erratum veneer. Only THUMB-mode
7240 veneers need to be handled because used only in Cortex-M. */
7243 record_stm32l4xx_erratum_veneer (struct bfd_link_info *link_info,
7244 elf32_stm32l4xx_erratum_list *branch,
7246 asection *branch_sec,
7247 unsigned int offset,
7248 bfd_size_type veneer_size)
7251 struct elf32_arm_link_hash_table *hash_table;
7253 struct elf_link_hash_entry *myh;
7254 struct bfd_link_hash_entry *bh;
7256 struct _arm_elf_section_data *sec_data;
7257 elf32_stm32l4xx_erratum_list *newerr;
7259 hash_table = elf32_arm_hash_table (link_info);
7260 BFD_ASSERT (hash_table != NULL);
7261 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
7263 s = bfd_get_linker_section
7264 (hash_table->bfd_of_glue_owner, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
7266 BFD_ASSERT (s != NULL);
7268 sec_data = elf32_arm_section_data (s);
7270 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7271 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
7273 BFD_ASSERT (tmp_name);
7275 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
7276 hash_table->num_stm32l4xx_fixes);
7278 myh = elf_link_hash_lookup
7279 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
7281 BFD_ASSERT (myh == NULL);
7284 val = hash_table->stm32l4xx_erratum_glue_size;
7285 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
7286 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
7287 NULL, TRUE, FALSE, &bh);
7289 myh = (struct elf_link_hash_entry *) bh;
7290 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7291 myh->forced_local = 1;
7293 /* Link veneer back to calling location. */
7294 sec_data->stm32l4xx_erratumcount += 1;
7295 newerr = (elf32_stm32l4xx_erratum_list *)
7296 bfd_zmalloc (sizeof (elf32_stm32l4xx_erratum_list));
7298 newerr->type = STM32L4XX_ERRATUM_VENEER;
7300 newerr->u.v.branch = branch;
7301 newerr->u.v.id = hash_table->num_stm32l4xx_fixes;
7302 branch->u.b.veneer = newerr;
7304 newerr->next = sec_data->stm32l4xx_erratumlist;
7305 sec_data->stm32l4xx_erratumlist = newerr;
7307 /* A symbol for the return from the veneer. */
7308 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
7309 hash_table->num_stm32l4xx_fixes);
7311 myh = elf_link_hash_lookup
7312 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
7319 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
7320 branch_sec, val, NULL, TRUE, FALSE, &bh);
7322 myh = (struct elf_link_hash_entry *) bh;
7323 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7324 myh->forced_local = 1;
7328 /* Generate a mapping symbol for the veneer section, and explicitly add an
7329 entry for that symbol to the code/data map for the section. */
7330 if (hash_table->stm32l4xx_erratum_glue_size == 0)
7333 /* Creates a THUMB symbol since there is no other choice. */
7334 _bfd_generic_link_add_one_symbol (link_info,
7335 hash_table->bfd_of_glue_owner, "$t",
7336 BSF_LOCAL, s, 0, NULL,
7339 myh = (struct elf_link_hash_entry *) bh;
7340 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7341 myh->forced_local = 1;
7343 /* The elf32_arm_init_maps function only cares about symbols from input
7344 BFDs. We must make a note of this generated mapping symbol
7345 ourselves so that code byteswapping works properly in
7346 elf32_arm_write_section. */
7347 elf32_arm_section_map_add (s, 't', 0);
7350 s->size += veneer_size;
7351 hash_table->stm32l4xx_erratum_glue_size += veneer_size;
7352 hash_table->num_stm32l4xx_fixes++;
7354 /* The offset of the veneer. */
7358 #define ARM_GLUE_SECTION_FLAGS \
7359 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
7360 | SEC_READONLY | SEC_LINKER_CREATED)
7362 /* Create a fake section for use by the ARM backend of the linker. */
7365 arm_make_glue_section (bfd * abfd, const char * name)
7369 sec = bfd_get_linker_section (abfd, name);
7374 sec = bfd_make_section_anyway_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
7377 || !bfd_set_section_alignment (abfd, sec, 2))
7380 /* Set the gc mark to prevent the section from being removed by garbage
7381 collection, despite the fact that no relocs refer to this section. */
7387 /* Set size of .plt entries. This function is called from the
7388 linker scripts in ld/emultempl/{armelf}.em. */
7391 bfd_elf32_arm_use_long_plt (void)
7393 elf32_arm_use_long_plt_entry = TRUE;
7396 /* Add the glue sections to ABFD. This function is called from the
7397 linker scripts in ld/emultempl/{armelf}.em. */
7400 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
7401 struct bfd_link_info *info)
7403 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
7404 bfd_boolean dostm32l4xx = globals
7405 && globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE;
7406 bfd_boolean addglue;
7408 /* If we are only performing a partial
7409 link do not bother adding the glue. */
7410 if (bfd_link_relocatable (info))
7413 addglue = arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
7414 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
7415 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
7416 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
7422 && arm_make_glue_section (abfd, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
7425 /* Mark output sections of veneers needing a dedicated one with SEC_KEEP. This
7426 ensures they are not marked for deletion by
7427 strip_excluded_output_sections () when veneers are going to be created
7428 later. Not doing so would trigger assert on empty section size in
7429 lang_size_sections_1 (). */
7432 bfd_elf32_arm_keep_private_stub_output_sections (struct bfd_link_info *info)
7434 enum elf32_arm_stub_type stub_type;
7436 /* If we are only performing a partial
7437 link do not bother adding the glue. */
7438 if (bfd_link_relocatable (info))
7441 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type; stub_type++)
7444 const char *out_sec_name;
7446 if (!arm_dedicated_stub_output_section_required (stub_type))
7449 out_sec_name = arm_dedicated_stub_output_section_name (stub_type);
7450 out_sec = bfd_get_section_by_name (info->output_bfd, out_sec_name);
7451 if (out_sec != NULL)
7452 out_sec->flags |= SEC_KEEP;
7456 /* Select a BFD to be used to hold the sections used by the glue code.
7457 This function is called from the linker scripts in ld/emultempl/
7461 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
7463 struct elf32_arm_link_hash_table *globals;
7465 /* If we are only performing a partial link
7466 do not bother getting a bfd to hold the glue. */
7467 if (bfd_link_relocatable (info))
7470 /* Make sure we don't attach the glue sections to a dynamic object. */
7471 BFD_ASSERT (!(abfd->flags & DYNAMIC));
7473 globals = elf32_arm_hash_table (info);
7474 BFD_ASSERT (globals != NULL);
7476 if (globals->bfd_of_glue_owner != NULL)
7479 /* Save the bfd for later use. */
7480 globals->bfd_of_glue_owner = abfd;
7486 check_use_blx (struct elf32_arm_link_hash_table *globals)
7490 cpu_arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
7493 if (globals->fix_arm1176)
7495 if (cpu_arch == TAG_CPU_ARCH_V6T2 || cpu_arch > TAG_CPU_ARCH_V6K)
7496 globals->use_blx = 1;
7500 if (cpu_arch > TAG_CPU_ARCH_V4T)
7501 globals->use_blx = 1;
7506 bfd_elf32_arm_process_before_allocation (bfd *abfd,
7507 struct bfd_link_info *link_info)
7509 Elf_Internal_Shdr *symtab_hdr;
7510 Elf_Internal_Rela *internal_relocs = NULL;
7511 Elf_Internal_Rela *irel, *irelend;
7512 bfd_byte *contents = NULL;
7515 struct elf32_arm_link_hash_table *globals;
7517 /* If we are only performing a partial link do not bother
7518 to construct any glue. */
7519 if (bfd_link_relocatable (link_info))
7522 /* Here we have a bfd that is to be included on the link. We have a
7523 hook to do reloc rummaging, before section sizes are nailed down. */
7524 globals = elf32_arm_hash_table (link_info);
7525 BFD_ASSERT (globals != NULL);
7527 check_use_blx (globals);
7529 if (globals->byteswap_code && !bfd_big_endian (abfd))
7531 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
7536 /* PR 5398: If we have not decided to include any loadable sections in
7537 the output then we will not have a glue owner bfd. This is OK, it
7538 just means that there is nothing else for us to do here. */
7539 if (globals->bfd_of_glue_owner == NULL)
7542 /* Rummage around all the relocs and map the glue vectors. */
7543 sec = abfd->sections;
7548 for (; sec != NULL; sec = sec->next)
7550 if (sec->reloc_count == 0)
7553 if ((sec->flags & SEC_EXCLUDE) != 0)
7556 symtab_hdr = & elf_symtab_hdr (abfd);
7558 /* Load the relocs. */
7560 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
7562 if (internal_relocs == NULL)
7565 irelend = internal_relocs + sec->reloc_count;
7566 for (irel = internal_relocs; irel < irelend; irel++)
7569 unsigned long r_index;
7571 struct elf_link_hash_entry *h;
7573 r_type = ELF32_R_TYPE (irel->r_info);
7574 r_index = ELF32_R_SYM (irel->r_info);
7576 /* These are the only relocation types we care about. */
7577 if ( r_type != R_ARM_PC24
7578 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
7581 /* Get the section contents if we haven't done so already. */
7582 if (contents == NULL)
7584 /* Get cached copy if it exists. */
7585 if (elf_section_data (sec)->this_hdr.contents != NULL)
7586 contents = elf_section_data (sec)->this_hdr.contents;
7589 /* Go get them off disk. */
7590 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
7595 if (r_type == R_ARM_V4BX)
7599 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
7600 record_arm_bx_glue (link_info, reg);
7604 /* If the relocation is not against a symbol it cannot concern us. */
7607 /* We don't care about local symbols. */
7608 if (r_index < symtab_hdr->sh_info)
7611 /* This is an external symbol. */
7612 r_index -= symtab_hdr->sh_info;
7613 h = (struct elf_link_hash_entry *)
7614 elf_sym_hashes (abfd)[r_index];
7616 /* If the relocation is against a static symbol it must be within
7617 the current section and so cannot be a cross ARM/Thumb relocation. */
7621 /* If the call will go through a PLT entry then we do not need
7623 if (globals->root.splt != NULL && h->plt.offset != (bfd_vma) -1)
7629 /* This one is a call from arm code. We need to look up
7630 the target of the call. If it is a thumb target, we
7632 if (ARM_GET_SYM_BRANCH_TYPE (h->target_internal)
7633 == ST_BRANCH_TO_THUMB)
7634 record_arm_to_thumb_glue (link_info, h);
7642 if (contents != NULL
7643 && elf_section_data (sec)->this_hdr.contents != contents)
7647 if (internal_relocs != NULL
7648 && elf_section_data (sec)->relocs != internal_relocs)
7649 free (internal_relocs);
7650 internal_relocs = NULL;
7656 if (contents != NULL
7657 && elf_section_data (sec)->this_hdr.contents != contents)
7659 if (internal_relocs != NULL
7660 && elf_section_data (sec)->relocs != internal_relocs)
7661 free (internal_relocs);
7668 /* Initialise maps of ARM/Thumb/data for input BFDs. */
7671 bfd_elf32_arm_init_maps (bfd *abfd)
7673 Elf_Internal_Sym *isymbuf;
7674 Elf_Internal_Shdr *hdr;
7675 unsigned int i, localsyms;
7677 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
7678 if (! is_arm_elf (abfd))
7681 if ((abfd->flags & DYNAMIC) != 0)
7684 hdr = & elf_symtab_hdr (abfd);
7685 localsyms = hdr->sh_info;
7687 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
7688 should contain the number of local symbols, which should come before any
7689 global symbols. Mapping symbols are always local. */
7690 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
7693 /* No internal symbols read? Skip this BFD. */
7694 if (isymbuf == NULL)
7697 for (i = 0; i < localsyms; i++)
7699 Elf_Internal_Sym *isym = &isymbuf[i];
7700 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7704 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
7706 name = bfd_elf_string_from_elf_section (abfd,
7707 hdr->sh_link, isym->st_name);
7709 if (bfd_is_arm_special_symbol_name (name,
7710 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
7711 elf32_arm_section_map_add (sec, name[1], isym->st_value);
7717 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
7718 say what they wanted. */
7721 bfd_elf32_arm_set_cortex_a8_fix (bfd *obfd, struct bfd_link_info *link_info)
7723 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7724 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
7726 if (globals == NULL)
7729 if (globals->fix_cortex_a8 == -1)
7731 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
7732 if (out_attr[Tag_CPU_arch].i == TAG_CPU_ARCH_V7
7733 && (out_attr[Tag_CPU_arch_profile].i == 'A'
7734 || out_attr[Tag_CPU_arch_profile].i == 0))
7735 globals->fix_cortex_a8 = 1;
7737 globals->fix_cortex_a8 = 0;
7743 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
7745 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7746 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
7748 if (globals == NULL)
7750 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
7751 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
7753 switch (globals->vfp11_fix)
7755 case BFD_ARM_VFP11_FIX_DEFAULT:
7756 case BFD_ARM_VFP11_FIX_NONE:
7757 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
7761 /* Give a warning, but do as the user requests anyway. */
7762 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
7763 "workaround is not necessary for target architecture"), obfd);
7766 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
7767 /* For earlier architectures, we might need the workaround, but do not
7768 enable it by default. If users is running with broken hardware, they
7769 must enable the erratum fix explicitly. */
7770 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
7774 bfd_elf32_arm_set_stm32l4xx_fix (bfd *obfd, struct bfd_link_info *link_info)
7776 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7777 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
7779 if (globals == NULL)
7782 /* We assume only Cortex-M4 may require the fix. */
7783 if (out_attr[Tag_CPU_arch].i != TAG_CPU_ARCH_V7E_M
7784 || out_attr[Tag_CPU_arch_profile].i != 'M')
7786 if (globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE)
7787 /* Give a warning, but do as the user requests anyway. */
7788 (*_bfd_error_handler)
7789 (_("%B: warning: selected STM32L4XX erratum "
7790 "workaround is not necessary for target architecture"), obfd);
7794 enum bfd_arm_vfp11_pipe
7802 /* Return a VFP register number. This is encoded as RX:X for single-precision
7803 registers, or X:RX for double-precision registers, where RX is the group of
7804 four bits in the instruction encoding and X is the single extension bit.
7805 RX and X fields are specified using their lowest (starting) bit. The return
7808 0...31: single-precision registers s0...s31
7809 32...63: double-precision registers d0...d31.
7811 Although X should be zero for VFP11 (encoding d0...d15 only), we might
7812 encounter VFP3 instructions, so we allow the full range for DP registers. */
7815 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
7819 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
7821 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
7824 /* Set bits in *WMASK according to a register number REG as encoded by
7825 bfd_arm_vfp11_regno(). Ignore d16-d31. */
7828 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
7833 *wmask |= 3 << ((reg - 32) * 2);
7836 /* Return TRUE if WMASK overwrites anything in REGS. */
7839 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
7843 for (i = 0; i < numregs; i++)
7845 unsigned int reg = regs[i];
7847 if (reg < 32 && (wmask & (1 << reg)) != 0)
7855 if ((wmask & (3 << (reg * 2))) != 0)
7862 /* In this function, we're interested in two things: finding input registers
7863 for VFP data-processing instructions, and finding the set of registers which
7864 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
7865 hold the written set, so FLDM etc. are easy to deal with (we're only
7866 interested in 32 SP registers or 16 dp registers, due to the VFP version
7867 implemented by the chip in question). DP registers are marked by setting
7868 both SP registers in the write mask). */
7870 static enum bfd_arm_vfp11_pipe
7871 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
7874 enum bfd_arm_vfp11_pipe vpipe = VFP11_BAD;
7875 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
7877 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
7880 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
7881 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
7883 pqrs = ((insn & 0x00800000) >> 20)
7884 | ((insn & 0x00300000) >> 19)
7885 | ((insn & 0x00000040) >> 6);
7889 case 0: /* fmac[sd]. */
7890 case 1: /* fnmac[sd]. */
7891 case 2: /* fmsc[sd]. */
7892 case 3: /* fnmsc[sd]. */
7894 bfd_arm_vfp11_write_mask (destmask, fd);
7896 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
7901 case 4: /* fmul[sd]. */
7902 case 5: /* fnmul[sd]. */
7903 case 6: /* fadd[sd]. */
7904 case 7: /* fsub[sd]. */
7908 case 8: /* fdiv[sd]. */
7911 bfd_arm_vfp11_write_mask (destmask, fd);
7912 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
7917 case 15: /* extended opcode. */
7919 unsigned int extn = ((insn >> 15) & 0x1e)
7920 | ((insn >> 7) & 1);
7924 case 0: /* fcpy[sd]. */
7925 case 1: /* fabs[sd]. */
7926 case 2: /* fneg[sd]. */
7927 case 8: /* fcmp[sd]. */
7928 case 9: /* fcmpe[sd]. */
7929 case 10: /* fcmpz[sd]. */
7930 case 11: /* fcmpez[sd]. */
7931 case 16: /* fuito[sd]. */
7932 case 17: /* fsito[sd]. */
7933 case 24: /* ftoui[sd]. */
7934 case 25: /* ftouiz[sd]. */
7935 case 26: /* ftosi[sd]. */
7936 case 27: /* ftosiz[sd]. */
7937 /* These instructions will not bounce due to underflow. */
7942 case 3: /* fsqrt[sd]. */
7943 /* fsqrt cannot underflow, but it can (perhaps) overwrite
7944 registers to cause the erratum in previous instructions. */
7945 bfd_arm_vfp11_write_mask (destmask, fd);
7949 case 15: /* fcvt{ds,sd}. */
7953 bfd_arm_vfp11_write_mask (destmask, fd);
7955 /* Only FCVTSD can underflow. */
7956 if ((insn & 0x100) != 0)
7975 /* Two-register transfer. */
7976 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
7978 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
7980 if ((insn & 0x100000) == 0)
7983 bfd_arm_vfp11_write_mask (destmask, fm);
7986 bfd_arm_vfp11_write_mask (destmask, fm);
7987 bfd_arm_vfp11_write_mask (destmask, fm + 1);
7993 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
7995 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
7996 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
8000 case 0: /* Two-reg transfer. We should catch these above. */
8003 case 2: /* fldm[sdx]. */
8007 unsigned int i, offset = insn & 0xff;
8012 for (i = fd; i < fd + offset; i++)
8013 bfd_arm_vfp11_write_mask (destmask, i);
8017 case 4: /* fld[sd]. */
8019 bfd_arm_vfp11_write_mask (destmask, fd);
8028 /* Single-register transfer. Note L==0. */
8029 else if ((insn & 0x0f100e10) == 0x0e000a10)
8031 unsigned int opcode = (insn >> 21) & 7;
8032 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
8036 case 0: /* fmsr/fmdlr. */
8037 case 1: /* fmdhr. */
8038 /* Mark fmdhr and fmdlr as writing to the whole of the DP
8039 destination register. I don't know if this is exactly right,
8040 but it is the conservative choice. */
8041 bfd_arm_vfp11_write_mask (destmask, fn);
8055 static int elf32_arm_compare_mapping (const void * a, const void * b);
8058 /* Look for potentially-troublesome code sequences which might trigger the
8059 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
8060 (available from ARM) for details of the erratum. A short version is
8061 described in ld.texinfo. */
8064 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
8067 bfd_byte *contents = NULL;
8069 int regs[3], numregs = 0;
8070 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
8071 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
8073 if (globals == NULL)
8076 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
8077 The states transition as follows:
8079 0 -> 1 (vector) or 0 -> 2 (scalar)
8080 A VFP FMAC-pipeline instruction has been seen. Fill
8081 regs[0]..regs[numregs-1] with its input operands. Remember this
8082 instruction in 'first_fmac'.
8085 Any instruction, except for a VFP instruction which overwrites
8090 A VFP instruction has been seen which overwrites any of regs[*].
8091 We must make a veneer! Reset state to 0 before examining next
8095 If we fail to match anything in state 2, reset to state 0 and reset
8096 the instruction pointer to the instruction after 'first_fmac'.
8098 If the VFP11 vector mode is in use, there must be at least two unrelated
8099 instructions between anti-dependent VFP11 instructions to properly avoid
8100 triggering the erratum, hence the use of the extra state 1. */
8102 /* If we are only performing a partial link do not bother
8103 to construct any glue. */
8104 if (bfd_link_relocatable (link_info))
8107 /* Skip if this bfd does not correspond to an ELF image. */
8108 if (! is_arm_elf (abfd))
8111 /* We should have chosen a fix type by the time we get here. */
8112 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
8114 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
8117 /* Skip this BFD if it corresponds to an executable or dynamic object. */
8118 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
8121 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8123 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
8124 struct _arm_elf_section_data *sec_data;
8126 /* If we don't have executable progbits, we're not interested in this
8127 section. Also skip if section is to be excluded. */
8128 if (elf_section_type (sec) != SHT_PROGBITS
8129 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
8130 || (sec->flags & SEC_EXCLUDE) != 0
8131 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8132 || sec->output_section == bfd_abs_section_ptr
8133 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
8136 sec_data = elf32_arm_section_data (sec);
8138 if (sec_data->mapcount == 0)
8141 if (elf_section_data (sec)->this_hdr.contents != NULL)
8142 contents = elf_section_data (sec)->this_hdr.contents;
8143 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
8146 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
8147 elf32_arm_compare_mapping);
8149 for (span = 0; span < sec_data->mapcount; span++)
8151 unsigned int span_start = sec_data->map[span].vma;
8152 unsigned int span_end = (span == sec_data->mapcount - 1)
8153 ? sec->size : sec_data->map[span + 1].vma;
8154 char span_type = sec_data->map[span].type;
8156 /* FIXME: Only ARM mode is supported at present. We may need to
8157 support Thumb-2 mode also at some point. */
8158 if (span_type != 'a')
8161 for (i = span_start; i < span_end;)
8163 unsigned int next_i = i + 4;
8164 unsigned int insn = bfd_big_endian (abfd)
8165 ? (contents[i] << 24)
8166 | (contents[i + 1] << 16)
8167 | (contents[i + 2] << 8)
8169 : (contents[i + 3] << 24)
8170 | (contents[i + 2] << 16)
8171 | (contents[i + 1] << 8)
8173 unsigned int writemask = 0;
8174 enum bfd_arm_vfp11_pipe vpipe;
8179 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
8181 /* I'm assuming the VFP11 erratum can trigger with denorm
8182 operands on either the FMAC or the DS pipeline. This might
8183 lead to slightly overenthusiastic veneer insertion. */
8184 if (vpipe == VFP11_FMAC || vpipe == VFP11_DS)
8186 state = use_vector ? 1 : 2;
8188 veneer_of_insn = insn;
8194 int other_regs[3], other_numregs;
8195 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
8198 if (vpipe != VFP11_BAD
8199 && bfd_arm_vfp11_antidependency (writemask, regs,
8209 int other_regs[3], other_numregs;
8210 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
8213 if (vpipe != VFP11_BAD
8214 && bfd_arm_vfp11_antidependency (writemask, regs,
8220 next_i = first_fmac + 4;
8226 abort (); /* Should be unreachable. */
8231 elf32_vfp11_erratum_list *newerr =(elf32_vfp11_erratum_list *)
8232 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
8234 elf32_arm_section_data (sec)->erratumcount += 1;
8236 newerr->u.b.vfp_insn = veneer_of_insn;
8241 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
8248 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
8253 newerr->next = sec_data->erratumlist;
8254 sec_data->erratumlist = newerr;
8263 if (contents != NULL
8264 && elf_section_data (sec)->this_hdr.contents != contents)
8272 if (contents != NULL
8273 && elf_section_data (sec)->this_hdr.contents != contents)
8279 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
8280 after sections have been laid out, using specially-named symbols. */
8283 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
8284 struct bfd_link_info *link_info)
8287 struct elf32_arm_link_hash_table *globals;
8290 if (bfd_link_relocatable (link_info))
8293 /* Skip if this bfd does not correspond to an ELF image. */
8294 if (! is_arm_elf (abfd))
8297 globals = elf32_arm_hash_table (link_info);
8298 if (globals == NULL)
8301 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
8302 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
8304 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8306 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
8307 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
8309 for (; errnode != NULL; errnode = errnode->next)
8311 struct elf_link_hash_entry *myh;
8314 switch (errnode->type)
8316 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
8317 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
8318 /* Find veneer symbol. */
8319 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
8320 errnode->u.b.veneer->u.v.id);
8322 myh = elf_link_hash_lookup
8323 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8326 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
8327 "`%s'"), abfd, tmp_name);
8329 vma = myh->root.u.def.section->output_section->vma
8330 + myh->root.u.def.section->output_offset
8331 + myh->root.u.def.value;
8333 errnode->u.b.veneer->vma = vma;
8336 case VFP11_ERRATUM_ARM_VENEER:
8337 case VFP11_ERRATUM_THUMB_VENEER:
8338 /* Find return location. */
8339 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
8342 myh = elf_link_hash_lookup
8343 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8346 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
8347 "`%s'"), abfd, tmp_name);
8349 vma = myh->root.u.def.section->output_section->vma
8350 + myh->root.u.def.section->output_offset
8351 + myh->root.u.def.value;
8353 errnode->u.v.branch->vma = vma;
8365 /* Find virtual-memory addresses for STM32L4XX erratum veneers and
8366 return locations after sections have been laid out, using
8367 specially-named symbols. */
8370 bfd_elf32_arm_stm32l4xx_fix_veneer_locations (bfd *abfd,
8371 struct bfd_link_info *link_info)
8374 struct elf32_arm_link_hash_table *globals;
8377 if (bfd_link_relocatable (link_info))
8380 /* Skip if this bfd does not correspond to an ELF image. */
8381 if (! is_arm_elf (abfd))
8384 globals = elf32_arm_hash_table (link_info);
8385 if (globals == NULL)
8388 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
8389 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
8391 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8393 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
8394 elf32_stm32l4xx_erratum_list *errnode = sec_data->stm32l4xx_erratumlist;
8396 for (; errnode != NULL; errnode = errnode->next)
8398 struct elf_link_hash_entry *myh;
8401 switch (errnode->type)
8403 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
8404 /* Find veneer symbol. */
8405 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
8406 errnode->u.b.veneer->u.v.id);
8408 myh = elf_link_hash_lookup
8409 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8412 (*_bfd_error_handler) (_("%B: unable to find STM32L4XX veneer "
8413 "`%s'"), abfd, tmp_name);
8415 vma = myh->root.u.def.section->output_section->vma
8416 + myh->root.u.def.section->output_offset
8417 + myh->root.u.def.value;
8419 errnode->u.b.veneer->vma = vma;
8422 case STM32L4XX_ERRATUM_VENEER:
8423 /* Find return location. */
8424 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
8427 myh = elf_link_hash_lookup
8428 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8431 (*_bfd_error_handler) (_("%B: unable to find STM32L4XX veneer "
8432 "`%s'"), abfd, tmp_name);
8434 vma = myh->root.u.def.section->output_section->vma
8435 + myh->root.u.def.section->output_offset
8436 + myh->root.u.def.value;
8438 errnode->u.v.branch->vma = vma;
8450 static inline bfd_boolean
8451 is_thumb2_ldmia (const insn32 insn)
8453 /* Encoding T2: LDM<c>.W <Rn>{!},<registers>
8454 1110 - 1000 - 10W1 - rrrr - PM (0) l - llll - llll - llll. */
8455 return (insn & 0xffd02000) == 0xe8900000;
8458 static inline bfd_boolean
8459 is_thumb2_ldmdb (const insn32 insn)
8461 /* Encoding T1: LDMDB<c> <Rn>{!},<registers>
8462 1110 - 1001 - 00W1 - rrrr - PM (0) l - llll - llll - llll. */
8463 return (insn & 0xffd02000) == 0xe9100000;
8466 static inline bfd_boolean
8467 is_thumb2_vldm (const insn32 insn)
8469 /* A6.5 Extension register load or store instruction
8471 We look for SP 32-bit and DP 64-bit registers.
8472 Encoding T1 VLDM{mode}<c> <Rn>{!}, <list>
8473 <list> is consecutive 64-bit registers
8474 1110 - 110P - UDW1 - rrrr - vvvv - 1011 - iiii - iiii
8475 Encoding T2 VLDM{mode}<c> <Rn>{!}, <list>
8476 <list> is consecutive 32-bit registers
8477 1110 - 110P - UDW1 - rrrr - vvvv - 1010 - iiii - iiii
8478 if P==0 && U==1 && W==1 && Rn=1101 VPOP
8479 if PUW=010 || PUW=011 || PUW=101 VLDM. */
8481 (((insn & 0xfe100f00) == 0xec100b00) ||
8482 ((insn & 0xfe100f00) == 0xec100a00))
8483 && /* (IA without !). */
8484 (((((insn << 7) >> 28) & 0xd) == 0x4)
8485 /* (IA with !), includes VPOP (when reg number is SP). */
8486 || ((((insn << 7) >> 28) & 0xd) == 0x5)
8488 || ((((insn << 7) >> 28) & 0xd) == 0x9));
8491 /* STM STM32L4XX erratum : This function assumes that it receives an LDM or
8493 - computes the number and the mode of memory accesses
8494 - decides if the replacement should be done:
8495 . replaces only if > 8-word accesses
8496 . or (testing purposes only) replaces all accesses. */
8499 stm32l4xx_need_create_replacing_stub (const insn32 insn,
8500 bfd_arm_stm32l4xx_fix stm32l4xx_fix)
8504 /* The field encoding the register list is the same for both LDMIA
8505 and LDMDB encodings. */
8506 if (is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn))
8507 nb_words = popcount (insn & 0x0000ffff);
8508 else if (is_thumb2_vldm (insn))
8509 nb_words = (insn & 0xff);
8511 /* DEFAULT mode accounts for the real bug condition situation,
8512 ALL mode inserts stubs for each LDM/VLDM instruction (testing). */
8514 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_DEFAULT) ? nb_words > 8 :
8515 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_ALL) ? TRUE : FALSE;
8518 /* Look for potentially-troublesome code sequences which might trigger
8519 the STM STM32L4XX erratum. */
8522 bfd_elf32_arm_stm32l4xx_erratum_scan (bfd *abfd,
8523 struct bfd_link_info *link_info)
8526 bfd_byte *contents = NULL;
8527 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
8529 if (globals == NULL)
8532 /* If we are only performing a partial link do not bother
8533 to construct any glue. */
8534 if (bfd_link_relocatable (link_info))
8537 /* Skip if this bfd does not correspond to an ELF image. */
8538 if (! is_arm_elf (abfd))
8541 if (globals->stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_NONE)
8544 /* Skip this BFD if it corresponds to an executable or dynamic object. */
8545 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
8548 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8550 unsigned int i, span;
8551 struct _arm_elf_section_data *sec_data;
8553 /* If we don't have executable progbits, we're not interested in this
8554 section. Also skip if section is to be excluded. */
8555 if (elf_section_type (sec) != SHT_PROGBITS
8556 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
8557 || (sec->flags & SEC_EXCLUDE) != 0
8558 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8559 || sec->output_section == bfd_abs_section_ptr
8560 || strcmp (sec->name, STM32L4XX_ERRATUM_VENEER_SECTION_NAME) == 0)
8563 sec_data = elf32_arm_section_data (sec);
8565 if (sec_data->mapcount == 0)
8568 if (elf_section_data (sec)->this_hdr.contents != NULL)
8569 contents = elf_section_data (sec)->this_hdr.contents;
8570 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
8573 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
8574 elf32_arm_compare_mapping);
8576 for (span = 0; span < sec_data->mapcount; span++)
8578 unsigned int span_start = sec_data->map[span].vma;
8579 unsigned int span_end = (span == sec_data->mapcount - 1)
8580 ? sec->size : sec_data->map[span + 1].vma;
8581 char span_type = sec_data->map[span].type;
8582 int itblock_current_pos = 0;
8584 /* Only Thumb2 mode need be supported with this CM4 specific
8585 code, we should not encounter any arm mode eg span_type
8587 if (span_type != 't')
8590 for (i = span_start; i < span_end;)
8592 unsigned int insn = bfd_get_16 (abfd, &contents[i]);
8593 bfd_boolean insn_32bit = FALSE;
8594 bfd_boolean is_ldm = FALSE;
8595 bfd_boolean is_vldm = FALSE;
8596 bfd_boolean is_not_last_in_it_block = FALSE;
8598 /* The first 16-bits of all 32-bit thumb2 instructions start
8599 with opcode[15..13]=0b111 and the encoded op1 can be anything
8600 except opcode[12..11]!=0b00.
8601 See 32-bit Thumb instruction encoding. */
8602 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
8605 /* Compute the predicate that tells if the instruction
8606 is concerned by the IT block
8607 - Creates an error if there is a ldm that is not
8608 last in the IT block thus cannot be replaced
8609 - Otherwise we can create a branch at the end of the
8610 IT block, it will be controlled naturally by IT
8611 with the proper pseudo-predicate
8612 - So the only interesting predicate is the one that
8613 tells that we are not on the last item of an IT
8615 if (itblock_current_pos != 0)
8616 is_not_last_in_it_block = !!--itblock_current_pos;
8620 /* Load the rest of the insn (in manual-friendly order). */
8621 insn = (insn << 16) | bfd_get_16 (abfd, &contents[i + 2]);
8622 is_ldm = is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn);
8623 is_vldm = is_thumb2_vldm (insn);
8625 /* Veneers are created for (v)ldm depending on
8626 option flags and memory accesses conditions; but
8627 if the instruction is not the last instruction of
8628 an IT block, we cannot create a jump there, so we
8630 if ((is_ldm || is_vldm)
8631 && stm32l4xx_need_create_replacing_stub
8632 (insn, globals->stm32l4xx_fix))
8634 if (is_not_last_in_it_block)
8636 (*_bfd_error_handler)
8637 /* Note - overlong line used here to allow for translation. */
8639 %B(%A+0x%lx): error: multiple load detected in non-last IT block instruction : STM32L4XX veneer cannot be generated.\n"
8640 "Use gcc option -mrestrict-it to generate only one instruction per IT block.\n"),
8641 abfd, sec, (long)i);
8645 elf32_stm32l4xx_erratum_list *newerr =
8646 (elf32_stm32l4xx_erratum_list *)
8648 (sizeof (elf32_stm32l4xx_erratum_list));
8650 elf32_arm_section_data (sec)
8651 ->stm32l4xx_erratumcount += 1;
8652 newerr->u.b.insn = insn;
8653 /* We create only thumb branches. */
8655 STM32L4XX_ERRATUM_BRANCH_TO_VENEER;
8656 record_stm32l4xx_erratum_veneer
8657 (link_info, newerr, abfd, sec,
8660 STM32L4XX_ERRATUM_LDM_VENEER_SIZE:
8661 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
8663 newerr->next = sec_data->stm32l4xx_erratumlist;
8664 sec_data->stm32l4xx_erratumlist = newerr;
8671 IT blocks are only encoded in T1
8672 Encoding T1: IT{x{y{z}}} <firstcond>
8673 1 0 1 1 - 1 1 1 1 - firstcond - mask
8674 if mask = '0000' then see 'related encodings'
8675 We don't deal with UNPREDICTABLE, just ignore these.
8676 There can be no nested IT blocks so an IT block
8677 is naturally a new one for which it is worth
8678 computing its size. */
8679 bfd_boolean is_newitblock = ((insn & 0xff00) == 0xbf00)
8680 && ((insn & 0x000f) != 0x0000);
8681 /* If we have a new IT block we compute its size. */
8684 /* Compute the number of instructions controlled
8685 by the IT block, it will be used to decide
8686 whether we are inside an IT block or not. */
8687 unsigned int mask = insn & 0x000f;
8688 itblock_current_pos = 4 - ctz (mask);
8692 i += insn_32bit ? 4 : 2;
8696 if (contents != NULL
8697 && elf_section_data (sec)->this_hdr.contents != contents)
8705 if (contents != NULL
8706 && elf_section_data (sec)->this_hdr.contents != contents)
8712 /* Set target relocation values needed during linking. */
8715 bfd_elf32_arm_set_target_params (struct bfd *output_bfd,
8716 struct bfd_link_info *link_info,
8717 struct elf32_arm_params *params)
8719 struct elf32_arm_link_hash_table *globals;
8721 globals = elf32_arm_hash_table (link_info);
8722 if (globals == NULL)
8725 globals->target1_is_rel = params->target1_is_rel;
8726 if (strcmp (params->target2_type, "rel") == 0)
8727 globals->target2_reloc = R_ARM_REL32;
8728 else if (strcmp (params->target2_type, "abs") == 0)
8729 globals->target2_reloc = R_ARM_ABS32;
8730 else if (strcmp (params->target2_type, "got-rel") == 0)
8731 globals->target2_reloc = R_ARM_GOT_PREL;
8734 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
8735 params->target2_type);
8737 globals->fix_v4bx = params->fix_v4bx;
8738 globals->use_blx |= params->use_blx;
8739 globals->vfp11_fix = params->vfp11_denorm_fix;
8740 globals->stm32l4xx_fix = params->stm32l4xx_fix;
8741 globals->pic_veneer = params->pic_veneer;
8742 globals->fix_cortex_a8 = params->fix_cortex_a8;
8743 globals->fix_arm1176 = params->fix_arm1176;
8744 globals->cmse_implib = params->cmse_implib;
8745 globals->in_implib_bfd = params->in_implib_bfd;
8747 BFD_ASSERT (is_arm_elf (output_bfd));
8748 elf_arm_tdata (output_bfd)->no_enum_size_warning
8749 = params->no_enum_size_warning;
8750 elf_arm_tdata (output_bfd)->no_wchar_size_warning
8751 = params->no_wchar_size_warning;
8754 /* Replace the target offset of a Thumb bl or b.w instruction. */
8757 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
8763 BFD_ASSERT ((offset & 1) == 0);
8765 upper = bfd_get_16 (abfd, insn);
8766 lower = bfd_get_16 (abfd, insn + 2);
8767 reloc_sign = (offset < 0) ? 1 : 0;
8768 upper = (upper & ~(bfd_vma) 0x7ff)
8769 | ((offset >> 12) & 0x3ff)
8770 | (reloc_sign << 10);
8771 lower = (lower & ~(bfd_vma) 0x2fff)
8772 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
8773 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
8774 | ((offset >> 1) & 0x7ff);
8775 bfd_put_16 (abfd, upper, insn);
8776 bfd_put_16 (abfd, lower, insn + 2);
8779 /* Thumb code calling an ARM function. */
8782 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
8786 asection * input_section,
8787 bfd_byte * hit_data,
8790 bfd_signed_vma addend,
8792 char **error_message)
8796 long int ret_offset;
8797 struct elf_link_hash_entry * myh;
8798 struct elf32_arm_link_hash_table * globals;
8800 myh = find_thumb_glue (info, name, error_message);
8804 globals = elf32_arm_hash_table (info);
8805 BFD_ASSERT (globals != NULL);
8806 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8808 my_offset = myh->root.u.def.value;
8810 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8811 THUMB2ARM_GLUE_SECTION_NAME);
8813 BFD_ASSERT (s != NULL);
8814 BFD_ASSERT (s->contents != NULL);
8815 BFD_ASSERT (s->output_section != NULL);
8817 if ((my_offset & 0x01) == 0x01)
8820 && sym_sec->owner != NULL
8821 && !INTERWORK_FLAG (sym_sec->owner))
8823 (*_bfd_error_handler)
8824 (_("%B(%s): warning: interworking not enabled.\n"
8825 " first occurrence: %B: Thumb call to ARM"),
8826 sym_sec->owner, input_bfd, name);
8832 myh->root.u.def.value = my_offset;
8834 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
8835 s->contents + my_offset);
8837 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
8838 s->contents + my_offset + 2);
8841 /* Address of destination of the stub. */
8842 ((bfd_signed_vma) val)
8844 /* Offset from the start of the current section
8845 to the start of the stubs. */
8847 /* Offset of the start of this stub from the start of the stubs. */
8849 /* Address of the start of the current section. */
8850 + s->output_section->vma)
8851 /* The branch instruction is 4 bytes into the stub. */
8853 /* ARM branches work from the pc of the instruction + 8. */
8856 put_arm_insn (globals, output_bfd,
8857 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
8858 s->contents + my_offset + 4);
8861 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
8863 /* Now go back and fix up the original BL insn to point to here. */
8865 /* Address of where the stub is located. */
8866 (s->output_section->vma + s->output_offset + my_offset)
8867 /* Address of where the BL is located. */
8868 - (input_section->output_section->vma + input_section->output_offset
8870 /* Addend in the relocation. */
8872 /* Biassing for PC-relative addressing. */
8875 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
8880 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
8882 static struct elf_link_hash_entry *
8883 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
8890 char ** error_message)
8893 long int ret_offset;
8894 struct elf_link_hash_entry * myh;
8895 struct elf32_arm_link_hash_table * globals;
8897 myh = find_arm_glue (info, name, error_message);
8901 globals = elf32_arm_hash_table (info);
8902 BFD_ASSERT (globals != NULL);
8903 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8905 my_offset = myh->root.u.def.value;
8907 if ((my_offset & 0x01) == 0x01)
8910 && sym_sec->owner != NULL
8911 && !INTERWORK_FLAG (sym_sec->owner))
8913 (*_bfd_error_handler)
8914 (_("%B(%s): warning: interworking not enabled.\n"
8915 " first occurrence: %B: arm call to thumb"),
8916 sym_sec->owner, input_bfd, name);
8920 myh->root.u.def.value = my_offset;
8922 if (bfd_link_pic (info)
8923 || globals->root.is_relocatable_executable
8924 || globals->pic_veneer)
8926 /* For relocatable objects we can't use absolute addresses,
8927 so construct the address from a relative offset. */
8928 /* TODO: If the offset is small it's probably worth
8929 constructing the address with adds. */
8930 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
8931 s->contents + my_offset);
8932 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
8933 s->contents + my_offset + 4);
8934 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
8935 s->contents + my_offset + 8);
8936 /* Adjust the offset by 4 for the position of the add,
8937 and 8 for the pipeline offset. */
8938 ret_offset = (val - (s->output_offset
8939 + s->output_section->vma
8942 bfd_put_32 (output_bfd, ret_offset,
8943 s->contents + my_offset + 12);
8945 else if (globals->use_blx)
8947 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
8948 s->contents + my_offset);
8950 /* It's a thumb address. Add the low order bit. */
8951 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
8952 s->contents + my_offset + 4);
8956 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
8957 s->contents + my_offset);
8959 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
8960 s->contents + my_offset + 4);
8962 /* It's a thumb address. Add the low order bit. */
8963 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
8964 s->contents + my_offset + 8);
8970 BFD_ASSERT (my_offset <= globals->arm_glue_size);
8975 /* Arm code calling a Thumb function. */
8978 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
8982 asection * input_section,
8983 bfd_byte * hit_data,
8986 bfd_signed_vma addend,
8988 char **error_message)
8990 unsigned long int tmp;
8993 long int ret_offset;
8994 struct elf_link_hash_entry * myh;
8995 struct elf32_arm_link_hash_table * globals;
8997 globals = elf32_arm_hash_table (info);
8998 BFD_ASSERT (globals != NULL);
8999 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9001 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9002 ARM2THUMB_GLUE_SECTION_NAME);
9003 BFD_ASSERT (s != NULL);
9004 BFD_ASSERT (s->contents != NULL);
9005 BFD_ASSERT (s->output_section != NULL);
9007 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
9008 sym_sec, val, s, error_message);
9012 my_offset = myh->root.u.def.value;
9013 tmp = bfd_get_32 (input_bfd, hit_data);
9014 tmp = tmp & 0xFF000000;
9016 /* Somehow these are both 4 too far, so subtract 8. */
9017 ret_offset = (s->output_offset
9019 + s->output_section->vma
9020 - (input_section->output_offset
9021 + input_section->output_section->vma
9025 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
9027 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
9032 /* Populate Arm stub for an exported Thumb function. */
9035 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
9037 struct bfd_link_info * info = (struct bfd_link_info *) inf;
9039 struct elf_link_hash_entry * myh;
9040 struct elf32_arm_link_hash_entry *eh;
9041 struct elf32_arm_link_hash_table * globals;
9044 char *error_message;
9046 eh = elf32_arm_hash_entry (h);
9047 /* Allocate stubs for exported Thumb functions on v4t. */
9048 if (eh->export_glue == NULL)
9051 globals = elf32_arm_hash_table (info);
9052 BFD_ASSERT (globals != NULL);
9053 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9055 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9056 ARM2THUMB_GLUE_SECTION_NAME);
9057 BFD_ASSERT (s != NULL);
9058 BFD_ASSERT (s->contents != NULL);
9059 BFD_ASSERT (s->output_section != NULL);
9061 sec = eh->export_glue->root.u.def.section;
9063 BFD_ASSERT (sec->output_section != NULL);
9065 val = eh->export_glue->root.u.def.value + sec->output_offset
9066 + sec->output_section->vma;
9068 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
9069 h->root.u.def.section->owner,
9070 globals->obfd, sec, val, s,
9076 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
9079 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
9084 struct elf32_arm_link_hash_table *globals;
9086 globals = elf32_arm_hash_table (info);
9087 BFD_ASSERT (globals != NULL);
9088 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9090 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9091 ARM_BX_GLUE_SECTION_NAME);
9092 BFD_ASSERT (s != NULL);
9093 BFD_ASSERT (s->contents != NULL);
9094 BFD_ASSERT (s->output_section != NULL);
9096 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
9098 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
9100 if ((globals->bx_glue_offset[reg] & 1) == 0)
9102 p = s->contents + glue_addr;
9103 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
9104 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
9105 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
9106 globals->bx_glue_offset[reg] |= 1;
9109 return glue_addr + s->output_section->vma + s->output_offset;
9112 /* Generate Arm stubs for exported Thumb symbols. */
9114 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
9115 struct bfd_link_info *link_info)
9117 struct elf32_arm_link_hash_table * globals;
9119 if (link_info == NULL)
9120 /* Ignore this if we are not called by the ELF backend linker. */
9123 globals = elf32_arm_hash_table (link_info);
9124 if (globals == NULL)
9127 /* If blx is available then exported Thumb symbols are OK and there is
9129 if (globals->use_blx)
9132 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
9136 /* Reserve space for COUNT dynamic relocations in relocation selection
9140 elf32_arm_allocate_dynrelocs (struct bfd_link_info *info, asection *sreloc,
9141 bfd_size_type count)
9143 struct elf32_arm_link_hash_table *htab;
9145 htab = elf32_arm_hash_table (info);
9146 BFD_ASSERT (htab->root.dynamic_sections_created);
9149 sreloc->size += RELOC_SIZE (htab) * count;
9152 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
9153 dynamic, the relocations should go in SRELOC, otherwise they should
9154 go in the special .rel.iplt section. */
9157 elf32_arm_allocate_irelocs (struct bfd_link_info *info, asection *sreloc,
9158 bfd_size_type count)
9160 struct elf32_arm_link_hash_table *htab;
9162 htab = elf32_arm_hash_table (info);
9163 if (!htab->root.dynamic_sections_created)
9164 htab->root.irelplt->size += RELOC_SIZE (htab) * count;
9167 BFD_ASSERT (sreloc != NULL);
9168 sreloc->size += RELOC_SIZE (htab) * count;
9172 /* Add relocation REL to the end of relocation section SRELOC. */
9175 elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info,
9176 asection *sreloc, Elf_Internal_Rela *rel)
9179 struct elf32_arm_link_hash_table *htab;
9181 htab = elf32_arm_hash_table (info);
9182 if (!htab->root.dynamic_sections_created
9183 && ELF32_R_TYPE (rel->r_info) == R_ARM_IRELATIVE)
9184 sreloc = htab->root.irelplt;
9187 loc = sreloc->contents;
9188 loc += sreloc->reloc_count++ * RELOC_SIZE (htab);
9189 if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
9191 SWAP_RELOC_OUT (htab) (output_bfd, rel, loc);
9194 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
9195 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
9199 elf32_arm_allocate_plt_entry (struct bfd_link_info *info,
9200 bfd_boolean is_iplt_entry,
9201 union gotplt_union *root_plt,
9202 struct arm_plt_info *arm_plt)
9204 struct elf32_arm_link_hash_table *htab;
9208 htab = elf32_arm_hash_table (info);
9212 splt = htab->root.iplt;
9213 sgotplt = htab->root.igotplt;
9215 /* NaCl uses a special first entry in .iplt too. */
9216 if (htab->nacl_p && splt->size == 0)
9217 splt->size += htab->plt_header_size;
9219 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
9220 elf32_arm_allocate_irelocs (info, htab->root.irelplt, 1);
9224 splt = htab->root.splt;
9225 sgotplt = htab->root.sgotplt;
9227 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
9228 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
9230 /* If this is the first .plt entry, make room for the special
9232 if (splt->size == 0)
9233 splt->size += htab->plt_header_size;
9235 htab->next_tls_desc_index++;
9238 /* Allocate the PLT entry itself, including any leading Thumb stub. */
9239 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
9240 splt->size += PLT_THUMB_STUB_SIZE;
9241 root_plt->offset = splt->size;
9242 splt->size += htab->plt_entry_size;
9244 if (!htab->symbian_p)
9246 /* We also need to make an entry in the .got.plt section, which
9247 will be placed in the .got section by the linker script. */
9249 arm_plt->got_offset = sgotplt->size;
9251 arm_plt->got_offset = sgotplt->size - 8 * htab->num_tls_desc;
9257 arm_movw_immediate (bfd_vma value)
9259 return (value & 0x00000fff) | ((value & 0x0000f000) << 4);
9263 arm_movt_immediate (bfd_vma value)
9265 return ((value & 0x0fff0000) >> 16) | ((value & 0xf0000000) >> 12);
9268 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
9269 the entry lives in .iplt and resolves to (*SYM_VALUE)().
9270 Otherwise, DYNINDX is the index of the symbol in the dynamic
9271 symbol table and SYM_VALUE is undefined.
9273 ROOT_PLT points to the offset of the PLT entry from the start of its
9274 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
9275 bookkeeping information.
9277 Returns FALSE if there was a problem. */
9280 elf32_arm_populate_plt_entry (bfd *output_bfd, struct bfd_link_info *info,
9281 union gotplt_union *root_plt,
9282 struct arm_plt_info *arm_plt,
9283 int dynindx, bfd_vma sym_value)
9285 struct elf32_arm_link_hash_table *htab;
9291 Elf_Internal_Rela rel;
9292 bfd_vma plt_header_size;
9293 bfd_vma got_header_size;
9295 htab = elf32_arm_hash_table (info);
9297 /* Pick the appropriate sections and sizes. */
9300 splt = htab->root.iplt;
9301 sgot = htab->root.igotplt;
9302 srel = htab->root.irelplt;
9304 /* There are no reserved entries in .igot.plt, and no special
9305 first entry in .iplt. */
9306 got_header_size = 0;
9307 plt_header_size = 0;
9311 splt = htab->root.splt;
9312 sgot = htab->root.sgotplt;
9313 srel = htab->root.srelplt;
9315 got_header_size = get_elf_backend_data (output_bfd)->got_header_size;
9316 plt_header_size = htab->plt_header_size;
9318 BFD_ASSERT (splt != NULL && srel != NULL);
9320 /* Fill in the entry in the procedure linkage table. */
9321 if (htab->symbian_p)
9323 BFD_ASSERT (dynindx >= 0);
9324 put_arm_insn (htab, output_bfd,
9325 elf32_arm_symbian_plt_entry[0],
9326 splt->contents + root_plt->offset);
9327 bfd_put_32 (output_bfd,
9328 elf32_arm_symbian_plt_entry[1],
9329 splt->contents + root_plt->offset + 4);
9331 /* Fill in the entry in the .rel.plt section. */
9332 rel.r_offset = (splt->output_section->vma
9333 + splt->output_offset
9334 + root_plt->offset + 4);
9335 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_GLOB_DAT);
9337 /* Get the index in the procedure linkage table which
9338 corresponds to this symbol. This is the index of this symbol
9339 in all the symbols for which we are making plt entries. The
9340 first entry in the procedure linkage table is reserved. */
9341 plt_index = ((root_plt->offset - plt_header_size)
9342 / htab->plt_entry_size);
9346 bfd_vma got_offset, got_address, plt_address;
9347 bfd_vma got_displacement, initial_got_entry;
9350 BFD_ASSERT (sgot != NULL);
9352 /* Get the offset into the .(i)got.plt table of the entry that
9353 corresponds to this function. */
9354 got_offset = (arm_plt->got_offset & -2);
9356 /* Get the index in the procedure linkage table which
9357 corresponds to this symbol. This is the index of this symbol
9358 in all the symbols for which we are making plt entries.
9359 After the reserved .got.plt entries, all symbols appear in
9360 the same order as in .plt. */
9361 plt_index = (got_offset - got_header_size) / 4;
9363 /* Calculate the address of the GOT entry. */
9364 got_address = (sgot->output_section->vma
9365 + sgot->output_offset
9368 /* ...and the address of the PLT entry. */
9369 plt_address = (splt->output_section->vma
9370 + splt->output_offset
9371 + root_plt->offset);
9373 ptr = splt->contents + root_plt->offset;
9374 if (htab->vxworks_p && bfd_link_pic (info))
9379 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9381 val = elf32_arm_vxworks_shared_plt_entry[i];
9383 val |= got_address - sgot->output_section->vma;
9385 val |= plt_index * RELOC_SIZE (htab);
9386 if (i == 2 || i == 5)
9387 bfd_put_32 (output_bfd, val, ptr);
9389 put_arm_insn (htab, output_bfd, val, ptr);
9392 else if (htab->vxworks_p)
9397 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9399 val = elf32_arm_vxworks_exec_plt_entry[i];
9403 val |= 0xffffff & -((root_plt->offset + i * 4 + 8) >> 2);
9405 val |= plt_index * RELOC_SIZE (htab);
9406 if (i == 2 || i == 5)
9407 bfd_put_32 (output_bfd, val, ptr);
9409 put_arm_insn (htab, output_bfd, val, ptr);
9412 loc = (htab->srelplt2->contents
9413 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
9415 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
9416 referencing the GOT for this PLT entry. */
9417 rel.r_offset = plt_address + 8;
9418 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9419 rel.r_addend = got_offset;
9420 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9421 loc += RELOC_SIZE (htab);
9423 /* Create the R_ARM_ABS32 relocation referencing the
9424 beginning of the PLT for this GOT entry. */
9425 rel.r_offset = got_address;
9426 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9428 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9430 else if (htab->nacl_p)
9432 /* Calculate the displacement between the PLT slot and the
9433 common tail that's part of the special initial PLT slot. */
9434 int32_t tail_displacement
9435 = ((splt->output_section->vma + splt->output_offset
9436 + ARM_NACL_PLT_TAIL_OFFSET)
9437 - (plt_address + htab->plt_entry_size + 4));
9438 BFD_ASSERT ((tail_displacement & 3) == 0);
9439 tail_displacement >>= 2;
9441 BFD_ASSERT ((tail_displacement & 0xff000000) == 0
9442 || (-tail_displacement & 0xff000000) == 0);
9444 /* Calculate the displacement between the PLT slot and the entry
9445 in the GOT. The offset accounts for the value produced by
9446 adding to pc in the penultimate instruction of the PLT stub. */
9447 got_displacement = (got_address
9448 - (plt_address + htab->plt_entry_size));
9450 /* NaCl does not support interworking at all. */
9451 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info, arm_plt));
9453 put_arm_insn (htab, output_bfd,
9454 elf32_arm_nacl_plt_entry[0]
9455 | arm_movw_immediate (got_displacement),
9457 put_arm_insn (htab, output_bfd,
9458 elf32_arm_nacl_plt_entry[1]
9459 | arm_movt_immediate (got_displacement),
9461 put_arm_insn (htab, output_bfd,
9462 elf32_arm_nacl_plt_entry[2],
9464 put_arm_insn (htab, output_bfd,
9465 elf32_arm_nacl_plt_entry[3]
9466 | (tail_displacement & 0x00ffffff),
9469 else if (using_thumb_only (htab))
9471 /* PR ld/16017: Generate thumb only PLT entries. */
9472 if (!using_thumb2 (htab))
9474 /* FIXME: We ought to be able to generate thumb-1 PLT
9476 _bfd_error_handler (_("%B: Warning: thumb-1 mode PLT generation not currently supported"),
9481 /* Calculate the displacement between the PLT slot and the entry in
9482 the GOT. The 12-byte offset accounts for the value produced by
9483 adding to pc in the 3rd instruction of the PLT stub. */
9484 got_displacement = got_address - (plt_address + 12);
9486 /* As we are using 32 bit instructions we have to use 'put_arm_insn'
9487 instead of 'put_thumb_insn'. */
9488 put_arm_insn (htab, output_bfd,
9489 elf32_thumb2_plt_entry[0]
9490 | ((got_displacement & 0x000000ff) << 16)
9491 | ((got_displacement & 0x00000700) << 20)
9492 | ((got_displacement & 0x00000800) >> 1)
9493 | ((got_displacement & 0x0000f000) >> 12),
9495 put_arm_insn (htab, output_bfd,
9496 elf32_thumb2_plt_entry[1]
9497 | ((got_displacement & 0x00ff0000) )
9498 | ((got_displacement & 0x07000000) << 4)
9499 | ((got_displacement & 0x08000000) >> 17)
9500 | ((got_displacement & 0xf0000000) >> 28),
9502 put_arm_insn (htab, output_bfd,
9503 elf32_thumb2_plt_entry[2],
9505 put_arm_insn (htab, output_bfd,
9506 elf32_thumb2_plt_entry[3],
9511 /* Calculate the displacement between the PLT slot and the
9512 entry in the GOT. The eight-byte offset accounts for the
9513 value produced by adding to pc in the first instruction
9515 got_displacement = got_address - (plt_address + 8);
9517 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
9519 put_thumb_insn (htab, output_bfd,
9520 elf32_arm_plt_thumb_stub[0], ptr - 4);
9521 put_thumb_insn (htab, output_bfd,
9522 elf32_arm_plt_thumb_stub[1], ptr - 2);
9525 if (!elf32_arm_use_long_plt_entry)
9527 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
9529 put_arm_insn (htab, output_bfd,
9530 elf32_arm_plt_entry_short[0]
9531 | ((got_displacement & 0x0ff00000) >> 20),
9533 put_arm_insn (htab, output_bfd,
9534 elf32_arm_plt_entry_short[1]
9535 | ((got_displacement & 0x000ff000) >> 12),
9537 put_arm_insn (htab, output_bfd,
9538 elf32_arm_plt_entry_short[2]
9539 | (got_displacement & 0x00000fff),
9541 #ifdef FOUR_WORD_PLT
9542 bfd_put_32 (output_bfd, elf32_arm_plt_entry_short[3], ptr + 12);
9547 put_arm_insn (htab, output_bfd,
9548 elf32_arm_plt_entry_long[0]
9549 | ((got_displacement & 0xf0000000) >> 28),
9551 put_arm_insn (htab, output_bfd,
9552 elf32_arm_plt_entry_long[1]
9553 | ((got_displacement & 0x0ff00000) >> 20),
9555 put_arm_insn (htab, output_bfd,
9556 elf32_arm_plt_entry_long[2]
9557 | ((got_displacement & 0x000ff000) >> 12),
9559 put_arm_insn (htab, output_bfd,
9560 elf32_arm_plt_entry_long[3]
9561 | (got_displacement & 0x00000fff),
9566 /* Fill in the entry in the .rel(a).(i)plt section. */
9567 rel.r_offset = got_address;
9571 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
9572 The dynamic linker or static executable then calls SYM_VALUE
9573 to determine the correct run-time value of the .igot.plt entry. */
9574 rel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
9575 initial_got_entry = sym_value;
9579 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_JUMP_SLOT);
9580 initial_got_entry = (splt->output_section->vma
9581 + splt->output_offset);
9584 /* Fill in the entry in the global offset table. */
9585 bfd_put_32 (output_bfd, initial_got_entry,
9586 sgot->contents + got_offset);
9590 elf32_arm_add_dynreloc (output_bfd, info, srel, &rel);
9593 loc = srel->contents + plt_index * RELOC_SIZE (htab);
9594 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9600 /* Some relocations map to different relocations depending on the
9601 target. Return the real relocation. */
9604 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
9610 if (globals->target1_is_rel)
9616 return globals->target2_reloc;
9623 /* Return the base VMA address which should be subtracted from real addresses
9624 when resolving @dtpoff relocation.
9625 This is PT_TLS segment p_vaddr. */
9628 dtpoff_base (struct bfd_link_info *info)
9630 /* If tls_sec is NULL, we should have signalled an error already. */
9631 if (elf_hash_table (info)->tls_sec == NULL)
9633 return elf_hash_table (info)->tls_sec->vma;
9636 /* Return the relocation value for @tpoff relocation
9637 if STT_TLS virtual address is ADDRESS. */
9640 tpoff (struct bfd_link_info *info, bfd_vma address)
9642 struct elf_link_hash_table *htab = elf_hash_table (info);
9645 /* If tls_sec is NULL, we should have signalled an error already. */
9646 if (htab->tls_sec == NULL)
9648 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
9649 return address - htab->tls_sec->vma + base;
9652 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
9653 VALUE is the relocation value. */
9655 static bfd_reloc_status_type
9656 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
9659 return bfd_reloc_overflow;
9661 value |= bfd_get_32 (abfd, data) & 0xfffff000;
9662 bfd_put_32 (abfd, value, data);
9663 return bfd_reloc_ok;
9666 /* Handle TLS relaxations. Relaxing is possible for symbols that use
9667 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
9668 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
9670 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
9671 is to then call final_link_relocate. Return other values in the
9674 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
9675 the pre-relaxed code. It would be nice if the relocs were updated
9676 to match the optimization. */
9678 static bfd_reloc_status_type
9679 elf32_arm_tls_relax (struct elf32_arm_link_hash_table *globals,
9680 bfd *input_bfd, asection *input_sec, bfd_byte *contents,
9681 Elf_Internal_Rela *rel, unsigned long is_local)
9685 switch (ELF32_R_TYPE (rel->r_info))
9688 return bfd_reloc_notsupported;
9690 case R_ARM_TLS_GOTDESC:
9695 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9697 insn -= 5; /* THUMB */
9699 insn -= 8; /* ARM */
9701 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9702 return bfd_reloc_continue;
9704 case R_ARM_THM_TLS_DESCSEQ:
9706 insn = bfd_get_16 (input_bfd, contents + rel->r_offset);
9707 if ((insn & 0xff78) == 0x4478) /* add rx, pc */
9711 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
9713 else if ((insn & 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
9717 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
9720 bfd_put_16 (input_bfd, insn & 0xf83f, contents + rel->r_offset);
9722 else if ((insn & 0xff87) == 0x4780) /* blx rx */
9726 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
9729 bfd_put_16 (input_bfd, 0x4600 | (insn & 0x78),
9730 contents + rel->r_offset);
9734 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
9735 /* It's a 32 bit instruction, fetch the rest of it for
9736 error generation. */
9738 | bfd_get_16 (input_bfd, contents + rel->r_offset + 2);
9739 (*_bfd_error_handler)
9740 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
9741 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
9742 return bfd_reloc_notsupported;
9746 case R_ARM_TLS_DESCSEQ:
9748 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9749 if ((insn & 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
9753 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xffff),
9754 contents + rel->r_offset);
9756 else if ((insn & 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
9760 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
9763 bfd_put_32 (input_bfd, insn & 0xfffff000,
9764 contents + rel->r_offset);
9766 else if ((insn & 0xfffffff0) == 0xe12fff30) /* blx rx */
9770 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
9773 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xf),
9774 contents + rel->r_offset);
9778 (*_bfd_error_handler)
9779 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
9780 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
9781 return bfd_reloc_notsupported;
9785 case R_ARM_TLS_CALL:
9786 /* GD->IE relaxation, turn the instruction into 'nop' or
9787 'ldr r0, [pc,r0]' */
9788 insn = is_local ? 0xe1a00000 : 0xe79f0000;
9789 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9792 case R_ARM_THM_TLS_CALL:
9793 /* GD->IE relaxation. */
9795 /* add r0,pc; ldr r0, [r0] */
9797 else if (using_thumb2 (globals))
9804 bfd_put_16 (input_bfd, insn >> 16, contents + rel->r_offset);
9805 bfd_put_16 (input_bfd, insn & 0xffff, contents + rel->r_offset + 2);
9808 return bfd_reloc_ok;
9811 /* For a given value of n, calculate the value of G_n as required to
9812 deal with group relocations. We return it in the form of an
9813 encoded constant-and-rotation, together with the final residual. If n is
9814 specified as less than zero, then final_residual is filled with the
9815 input value and no further action is performed. */
9818 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
9822 bfd_vma encoded_g_n = 0;
9823 bfd_vma residual = value; /* Also known as Y_n. */
9825 for (current_n = 0; current_n <= n; current_n++)
9829 /* Calculate which part of the value to mask. */
9836 /* Determine the most significant bit in the residual and
9837 align the resulting value to a 2-bit boundary. */
9838 for (msb = 30; msb >= 0; msb -= 2)
9839 if (residual & (3 << msb))
9842 /* The desired shift is now (msb - 6), or zero, whichever
9849 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
9850 g_n = residual & (0xff << shift);
9851 encoded_g_n = (g_n >> shift)
9852 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
9854 /* Calculate the residual for the next time around. */
9858 *final_residual = residual;
9863 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
9864 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
9867 identify_add_or_sub (bfd_vma insn)
9869 int opcode = insn & 0x1e00000;
9871 if (opcode == 1 << 23) /* ADD */
9874 if (opcode == 1 << 22) /* SUB */
9880 /* Perform a relocation as part of a final link. */
9882 static bfd_reloc_status_type
9883 elf32_arm_final_link_relocate (reloc_howto_type * howto,
9886 asection * input_section,
9887 bfd_byte * contents,
9888 Elf_Internal_Rela * rel,
9890 struct bfd_link_info * info,
9892 const char * sym_name,
9893 unsigned char st_type,
9894 enum arm_st_branch_type branch_type,
9895 struct elf_link_hash_entry * h,
9896 bfd_boolean * unresolved_reloc_p,
9897 char ** error_message)
9899 unsigned long r_type = howto->type;
9900 unsigned long r_symndx;
9901 bfd_byte * hit_data = contents + rel->r_offset;
9902 bfd_vma * local_got_offsets;
9903 bfd_vma * local_tlsdesc_gotents;
9906 asection * sreloc = NULL;
9909 bfd_signed_vma signed_addend;
9910 unsigned char dynreloc_st_type;
9911 bfd_vma dynreloc_value;
9912 struct elf32_arm_link_hash_table * globals;
9913 struct elf32_arm_link_hash_entry *eh;
9914 union gotplt_union *root_plt;
9915 struct arm_plt_info *arm_plt;
9917 bfd_vma gotplt_offset;
9918 bfd_boolean has_iplt_entry;
9920 globals = elf32_arm_hash_table (info);
9921 if (globals == NULL)
9922 return bfd_reloc_notsupported;
9924 BFD_ASSERT (is_arm_elf (input_bfd));
9926 /* Some relocation types map to different relocations depending on the
9927 target. We pick the right one here. */
9928 r_type = arm_real_reloc_type (globals, r_type);
9930 /* It is possible to have linker relaxations on some TLS access
9931 models. Update our information here. */
9932 r_type = elf32_arm_tls_transition (info, r_type, h);
9934 if (r_type != howto->type)
9935 howto = elf32_arm_howto_from_type (r_type);
9937 eh = (struct elf32_arm_link_hash_entry *) h;
9938 sgot = globals->root.sgot;
9939 local_got_offsets = elf_local_got_offsets (input_bfd);
9940 local_tlsdesc_gotents = elf32_arm_local_tlsdesc_gotent (input_bfd);
9942 if (globals->root.dynamic_sections_created)
9943 srelgot = globals->root.srelgot;
9947 r_symndx = ELF32_R_SYM (rel->r_info);
9949 if (globals->use_rel)
9951 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
9953 if (addend & ((howto->src_mask + 1) >> 1))
9956 signed_addend &= ~ howto->src_mask;
9957 signed_addend |= addend;
9960 signed_addend = addend;
9963 addend = signed_addend = rel->r_addend;
9965 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
9966 are resolving a function call relocation. */
9967 if (using_thumb_only (globals)
9968 && (r_type == R_ARM_THM_CALL
9969 || r_type == R_ARM_THM_JUMP24)
9970 && branch_type == ST_BRANCH_TO_ARM)
9971 branch_type = ST_BRANCH_TO_THUMB;
9973 /* Record the symbol information that should be used in dynamic
9975 dynreloc_st_type = st_type;
9976 dynreloc_value = value;
9977 if (branch_type == ST_BRANCH_TO_THUMB)
9978 dynreloc_value |= 1;
9980 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
9981 VALUE appropriately for relocations that we resolve at link time. */
9982 has_iplt_entry = FALSE;
9983 if (elf32_arm_get_plt_info (input_bfd, globals, eh, r_symndx, &root_plt,
9985 && root_plt->offset != (bfd_vma) -1)
9987 plt_offset = root_plt->offset;
9988 gotplt_offset = arm_plt->got_offset;
9990 if (h == NULL || eh->is_iplt)
9992 has_iplt_entry = TRUE;
9993 splt = globals->root.iplt;
9995 /* Populate .iplt entries here, because not all of them will
9996 be seen by finish_dynamic_symbol. The lower bit is set if
9997 we have already populated the entry. */
10002 if (elf32_arm_populate_plt_entry (output_bfd, info, root_plt, arm_plt,
10003 -1, dynreloc_value))
10004 root_plt->offset |= 1;
10006 return bfd_reloc_notsupported;
10009 /* Static relocations always resolve to the .iplt entry. */
10010 st_type = STT_FUNC;
10011 value = (splt->output_section->vma
10012 + splt->output_offset
10014 branch_type = ST_BRANCH_TO_ARM;
10016 /* If there are non-call relocations that resolve to the .iplt
10017 entry, then all dynamic ones must too. */
10018 if (arm_plt->noncall_refcount != 0)
10020 dynreloc_st_type = st_type;
10021 dynreloc_value = value;
10025 /* We populate the .plt entry in finish_dynamic_symbol. */
10026 splt = globals->root.splt;
10031 plt_offset = (bfd_vma) -1;
10032 gotplt_offset = (bfd_vma) -1;
10038 /* We don't need to find a value for this symbol. It's just a
10040 *unresolved_reloc_p = FALSE;
10041 return bfd_reloc_ok;
10044 if (!globals->vxworks_p)
10045 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
10049 case R_ARM_ABS32_NOI:
10051 case R_ARM_REL32_NOI:
10057 /* Handle relocations which should use the PLT entry. ABS32/REL32
10058 will use the symbol's value, which may point to a PLT entry, but we
10059 don't need to handle that here. If we created a PLT entry, all
10060 branches in this object should go to it, except if the PLT is too
10061 far away, in which case a long branch stub should be inserted. */
10062 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
10063 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI
10064 && r_type != R_ARM_CALL
10065 && r_type != R_ARM_JUMP24
10066 && r_type != R_ARM_PLT32)
10067 && plt_offset != (bfd_vma) -1)
10069 /* If we've created a .plt section, and assigned a PLT entry
10070 to this function, it must either be a STT_GNU_IFUNC reference
10071 or not be known to bind locally. In other cases, we should
10072 have cleared the PLT entry by now. */
10073 BFD_ASSERT (has_iplt_entry || !SYMBOL_CALLS_LOCAL (info, h));
10075 value = (splt->output_section->vma
10076 + splt->output_offset
10078 *unresolved_reloc_p = FALSE;
10079 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10080 contents, rel->r_offset, value,
10084 /* When generating a shared object or relocatable executable, these
10085 relocations are copied into the output file to be resolved at
10087 if ((bfd_link_pic (info)
10088 || globals->root.is_relocatable_executable)
10089 && (input_section->flags & SEC_ALLOC)
10090 && !(globals->vxworks_p
10091 && strcmp (input_section->output_section->name,
10093 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
10094 || !SYMBOL_CALLS_LOCAL (info, h))
10095 && !(input_bfd == globals->stub_bfd
10096 && strstr (input_section->name, STUB_SUFFIX))
10098 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10099 || h->root.type != bfd_link_hash_undefweak)
10100 && r_type != R_ARM_PC24
10101 && r_type != R_ARM_CALL
10102 && r_type != R_ARM_JUMP24
10103 && r_type != R_ARM_PREL31
10104 && r_type != R_ARM_PLT32)
10106 Elf_Internal_Rela outrel;
10107 bfd_boolean skip, relocate;
10109 if ((r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
10110 && !h->def_regular)
10112 char *v = _("shared object");
10114 if (bfd_link_executable (info))
10115 v = _("PIE executable");
10117 (*_bfd_error_handler)
10118 (_("%B: relocation %s against external or undefined symbol `%s'"
10119 " can not be used when making a %s; recompile with -fPIC"), input_bfd,
10120 elf32_arm_howto_table_1[r_type].name, h->root.root.string, v);
10121 return bfd_reloc_notsupported;
10124 *unresolved_reloc_p = FALSE;
10126 if (sreloc == NULL && globals->root.dynamic_sections_created)
10128 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
10129 ! globals->use_rel);
10131 if (sreloc == NULL)
10132 return bfd_reloc_notsupported;
10138 outrel.r_addend = addend;
10140 _bfd_elf_section_offset (output_bfd, info, input_section,
10142 if (outrel.r_offset == (bfd_vma) -1)
10144 else if (outrel.r_offset == (bfd_vma) -2)
10145 skip = TRUE, relocate = TRUE;
10146 outrel.r_offset += (input_section->output_section->vma
10147 + input_section->output_offset);
10150 memset (&outrel, 0, sizeof outrel);
10152 && h->dynindx != -1
10153 && (!bfd_link_pic (info)
10154 || !SYMBOLIC_BIND (info, h)
10155 || !h->def_regular))
10156 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
10161 /* This symbol is local, or marked to become local. */
10162 BFD_ASSERT (r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI);
10163 if (globals->symbian_p)
10167 /* On Symbian OS, the data segment and text segement
10168 can be relocated independently. Therefore, we
10169 must indicate the segment to which this
10170 relocation is relative. The BPABI allows us to
10171 use any symbol in the right segment; we just use
10172 the section symbol as it is convenient. (We
10173 cannot use the symbol given by "h" directly as it
10174 will not appear in the dynamic symbol table.)
10176 Note that the dynamic linker ignores the section
10177 symbol value, so we don't subtract osec->vma
10178 from the emitted reloc addend. */
10180 osec = sym_sec->output_section;
10182 osec = input_section->output_section;
10183 symbol = elf_section_data (osec)->dynindx;
10186 struct elf_link_hash_table *htab = elf_hash_table (info);
10188 if ((osec->flags & SEC_READONLY) == 0
10189 && htab->data_index_section != NULL)
10190 osec = htab->data_index_section;
10192 osec = htab->text_index_section;
10193 symbol = elf_section_data (osec)->dynindx;
10195 BFD_ASSERT (symbol != 0);
10198 /* On SVR4-ish systems, the dynamic loader cannot
10199 relocate the text and data segments independently,
10200 so the symbol does not matter. */
10202 if (dynreloc_st_type == STT_GNU_IFUNC)
10203 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
10204 to the .iplt entry. Instead, every non-call reference
10205 must use an R_ARM_IRELATIVE relocation to obtain the
10206 correct run-time address. */
10207 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_IRELATIVE);
10209 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
10210 if (globals->use_rel)
10213 outrel.r_addend += dynreloc_value;
10216 elf32_arm_add_dynreloc (output_bfd, info, sreloc, &outrel);
10218 /* If this reloc is against an external symbol, we do not want to
10219 fiddle with the addend. Otherwise, we need to include the symbol
10220 value so that it becomes an addend for the dynamic reloc. */
10222 return bfd_reloc_ok;
10224 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10225 contents, rel->r_offset,
10226 dynreloc_value, (bfd_vma) 0);
10228 else switch (r_type)
10231 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
10233 case R_ARM_XPC25: /* Arm BLX instruction. */
10236 case R_ARM_PC24: /* Arm B/BL instruction. */
10239 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
10241 if (r_type == R_ARM_XPC25)
10243 /* Check for Arm calling Arm function. */
10244 /* FIXME: Should we translate the instruction into a BL
10245 instruction instead ? */
10246 if (branch_type != ST_BRANCH_TO_THUMB)
10247 (*_bfd_error_handler)
10248 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
10250 h ? h->root.root.string : "(local)");
10252 else if (r_type == R_ARM_PC24)
10254 /* Check for Arm calling Thumb function. */
10255 if (branch_type == ST_BRANCH_TO_THUMB)
10257 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
10258 output_bfd, input_section,
10259 hit_data, sym_sec, rel->r_offset,
10260 signed_addend, value,
10262 return bfd_reloc_ok;
10264 return bfd_reloc_dangerous;
10268 /* Check if a stub has to be inserted because the
10269 destination is too far or we are changing mode. */
10270 if ( r_type == R_ARM_CALL
10271 || r_type == R_ARM_JUMP24
10272 || r_type == R_ARM_PLT32)
10274 enum elf32_arm_stub_type stub_type = arm_stub_none;
10275 struct elf32_arm_link_hash_entry *hash;
10277 hash = (struct elf32_arm_link_hash_entry *) h;
10278 stub_type = arm_type_of_stub (info, input_section, rel,
10279 st_type, &branch_type,
10280 hash, value, sym_sec,
10281 input_bfd, sym_name);
10283 if (stub_type != arm_stub_none)
10285 /* The target is out of reach, so redirect the
10286 branch to the local stub for this function. */
10287 stub_entry = elf32_arm_get_stub_entry (input_section,
10292 if (stub_entry != NULL)
10293 value = (stub_entry->stub_offset
10294 + stub_entry->stub_sec->output_offset
10295 + stub_entry->stub_sec->output_section->vma);
10297 if (plt_offset != (bfd_vma) -1)
10298 *unresolved_reloc_p = FALSE;
10303 /* If the call goes through a PLT entry, make sure to
10304 check distance to the right destination address. */
10305 if (plt_offset != (bfd_vma) -1)
10307 value = (splt->output_section->vma
10308 + splt->output_offset
10310 *unresolved_reloc_p = FALSE;
10311 /* The PLT entry is in ARM mode, regardless of the
10312 target function. */
10313 branch_type = ST_BRANCH_TO_ARM;
10318 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
10320 S is the address of the symbol in the relocation.
10321 P is address of the instruction being relocated.
10322 A is the addend (extracted from the instruction) in bytes.
10324 S is held in 'value'.
10325 P is the base address of the section containing the
10326 instruction plus the offset of the reloc into that
10328 (input_section->output_section->vma +
10329 input_section->output_offset +
10331 A is the addend, converted into bytes, ie:
10332 (signed_addend * 4)
10334 Note: None of these operations have knowledge of the pipeline
10335 size of the processor, thus it is up to the assembler to
10336 encode this information into the addend. */
10337 value -= (input_section->output_section->vma
10338 + input_section->output_offset);
10339 value -= rel->r_offset;
10340 if (globals->use_rel)
10341 value += (signed_addend << howto->size);
10343 /* RELA addends do not have to be adjusted by howto->size. */
10344 value += signed_addend;
10346 signed_addend = value;
10347 signed_addend >>= howto->rightshift;
10349 /* A branch to an undefined weak symbol is turned into a jump to
10350 the next instruction unless a PLT entry will be created.
10351 Do the same for local undefined symbols (but not for STN_UNDEF).
10352 The jump to the next instruction is optimized as a NOP depending
10353 on the architecture. */
10354 if (h ? (h->root.type == bfd_link_hash_undefweak
10355 && plt_offset == (bfd_vma) -1)
10356 : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec))
10358 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000);
10360 if (arch_has_arm_nop (globals))
10361 value |= 0x0320f000;
10363 value |= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
10367 /* Perform a signed range check. */
10368 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
10369 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
10370 return bfd_reloc_overflow;
10372 addend = (value & 2);
10374 value = (signed_addend & howto->dst_mask)
10375 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
10377 if (r_type == R_ARM_CALL)
10379 /* Set the H bit in the BLX instruction. */
10380 if (branch_type == ST_BRANCH_TO_THUMB)
10383 value |= (1 << 24);
10385 value &= ~(bfd_vma)(1 << 24);
10388 /* Select the correct instruction (BL or BLX). */
10389 /* Only if we are not handling a BL to a stub. In this
10390 case, mode switching is performed by the stub. */
10391 if (branch_type == ST_BRANCH_TO_THUMB && !stub_entry)
10392 value |= (1 << 28);
10393 else if (stub_entry || branch_type != ST_BRANCH_UNKNOWN)
10395 value &= ~(bfd_vma)(1 << 28);
10396 value |= (1 << 24);
10405 if (branch_type == ST_BRANCH_TO_THUMB)
10409 case R_ARM_ABS32_NOI:
10415 if (branch_type == ST_BRANCH_TO_THUMB)
10417 value -= (input_section->output_section->vma
10418 + input_section->output_offset + rel->r_offset);
10421 case R_ARM_REL32_NOI:
10423 value -= (input_section->output_section->vma
10424 + input_section->output_offset + rel->r_offset);
10428 value -= (input_section->output_section->vma
10429 + input_section->output_offset + rel->r_offset);
10430 value += signed_addend;
10431 if (! h || h->root.type != bfd_link_hash_undefweak)
10433 /* Check for overflow. */
10434 if ((value ^ (value >> 1)) & (1 << 30))
10435 return bfd_reloc_overflow;
10437 value &= 0x7fffffff;
10438 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
10439 if (branch_type == ST_BRANCH_TO_THUMB)
10444 bfd_put_32 (input_bfd, value, hit_data);
10445 return bfd_reloc_ok;
10448 /* PR 16202: Refectch the addend using the correct size. */
10449 if (globals->use_rel)
10450 addend = bfd_get_8 (input_bfd, hit_data);
10453 /* There is no way to tell whether the user intended to use a signed or
10454 unsigned addend. When checking for overflow we accept either,
10455 as specified by the AAELF. */
10456 if ((long) value > 0xff || (long) value < -0x80)
10457 return bfd_reloc_overflow;
10459 bfd_put_8 (input_bfd, value, hit_data);
10460 return bfd_reloc_ok;
10463 /* PR 16202: Refectch the addend using the correct size. */
10464 if (globals->use_rel)
10465 addend = bfd_get_16 (input_bfd, hit_data);
10468 /* See comment for R_ARM_ABS8. */
10469 if ((long) value > 0xffff || (long) value < -0x8000)
10470 return bfd_reloc_overflow;
10472 bfd_put_16 (input_bfd, value, hit_data);
10473 return bfd_reloc_ok;
10475 case R_ARM_THM_ABS5:
10476 /* Support ldr and str instructions for the thumb. */
10477 if (globals->use_rel)
10479 /* Need to refetch addend. */
10480 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
10481 /* ??? Need to determine shift amount from operand size. */
10482 addend >>= howto->rightshift;
10486 /* ??? Isn't value unsigned? */
10487 if ((long) value > 0x1f || (long) value < -0x10)
10488 return bfd_reloc_overflow;
10490 /* ??? Value needs to be properly shifted into place first. */
10491 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
10492 bfd_put_16 (input_bfd, value, hit_data);
10493 return bfd_reloc_ok;
10495 case R_ARM_THM_ALU_PREL_11_0:
10496 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
10499 bfd_signed_vma relocation;
10501 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
10502 | bfd_get_16 (input_bfd, hit_data + 2);
10504 if (globals->use_rel)
10506 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
10507 | ((insn & (1 << 26)) >> 15);
10508 if (insn & 0xf00000)
10509 signed_addend = -signed_addend;
10512 relocation = value + signed_addend;
10513 relocation -= Pa (input_section->output_section->vma
10514 + input_section->output_offset
10517 value = relocation;
10519 if (value >= 0x1000)
10520 return bfd_reloc_overflow;
10522 insn = (insn & 0xfb0f8f00) | (value & 0xff)
10523 | ((value & 0x700) << 4)
10524 | ((value & 0x800) << 15);
10525 if (relocation < 0)
10528 bfd_put_16 (input_bfd, insn >> 16, hit_data);
10529 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
10531 return bfd_reloc_ok;
10534 case R_ARM_THM_PC8:
10535 /* PR 10073: This reloc is not generated by the GNU toolchain,
10536 but it is supported for compatibility with third party libraries
10537 generated by other compilers, specifically the ARM/IAR. */
10540 bfd_signed_vma relocation;
10542 insn = bfd_get_16 (input_bfd, hit_data);
10544 if (globals->use_rel)
10545 addend = ((((insn & 0x00ff) << 2) + 4) & 0x3ff) -4;
10547 relocation = value + addend;
10548 relocation -= Pa (input_section->output_section->vma
10549 + input_section->output_offset
10552 value = relocation;
10554 /* We do not check for overflow of this reloc. Although strictly
10555 speaking this is incorrect, it appears to be necessary in order
10556 to work with IAR generated relocs. Since GCC and GAS do not
10557 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
10558 a problem for them. */
10561 insn = (insn & 0xff00) | (value >> 2);
10563 bfd_put_16 (input_bfd, insn, hit_data);
10565 return bfd_reloc_ok;
10568 case R_ARM_THM_PC12:
10569 /* Corresponds to: ldr.w reg, [pc, #offset]. */
10572 bfd_signed_vma relocation;
10574 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
10575 | bfd_get_16 (input_bfd, hit_data + 2);
10577 if (globals->use_rel)
10579 signed_addend = insn & 0xfff;
10580 if (!(insn & (1 << 23)))
10581 signed_addend = -signed_addend;
10584 relocation = value + signed_addend;
10585 relocation -= Pa (input_section->output_section->vma
10586 + input_section->output_offset
10589 value = relocation;
10591 if (value >= 0x1000)
10592 return bfd_reloc_overflow;
10594 insn = (insn & 0xff7ff000) | value;
10595 if (relocation >= 0)
10598 bfd_put_16 (input_bfd, insn >> 16, hit_data);
10599 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
10601 return bfd_reloc_ok;
10604 case R_ARM_THM_XPC22:
10605 case R_ARM_THM_CALL:
10606 case R_ARM_THM_JUMP24:
10607 /* Thumb BL (branch long instruction). */
10609 bfd_vma relocation;
10610 bfd_vma reloc_sign;
10611 bfd_boolean overflow = FALSE;
10612 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
10613 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
10614 bfd_signed_vma reloc_signed_max;
10615 bfd_signed_vma reloc_signed_min;
10617 bfd_signed_vma signed_check;
10619 const int thumb2 = using_thumb2 (globals);
10620 const int thumb2_bl = using_thumb2_bl (globals);
10622 /* A branch to an undefined weak symbol is turned into a jump to
10623 the next instruction unless a PLT entry will be created.
10624 The jump to the next instruction is optimized as a NOP.W for
10625 Thumb-2 enabled architectures. */
10626 if (h && h->root.type == bfd_link_hash_undefweak
10627 && plt_offset == (bfd_vma) -1)
10631 bfd_put_16 (input_bfd, 0xf3af, hit_data);
10632 bfd_put_16 (input_bfd, 0x8000, hit_data + 2);
10636 bfd_put_16 (input_bfd, 0xe000, hit_data);
10637 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
10639 return bfd_reloc_ok;
10642 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
10643 with Thumb-1) involving the J1 and J2 bits. */
10644 if (globals->use_rel)
10646 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
10647 bfd_vma upper = upper_insn & 0x3ff;
10648 bfd_vma lower = lower_insn & 0x7ff;
10649 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
10650 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
10651 bfd_vma i1 = j1 ^ s ? 0 : 1;
10652 bfd_vma i2 = j2 ^ s ? 0 : 1;
10654 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
10656 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
10658 signed_addend = addend;
10661 if (r_type == R_ARM_THM_XPC22)
10663 /* Check for Thumb to Thumb call. */
10664 /* FIXME: Should we translate the instruction into a BL
10665 instruction instead ? */
10666 if (branch_type == ST_BRANCH_TO_THUMB)
10667 (*_bfd_error_handler)
10668 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
10670 h ? h->root.root.string : "(local)");
10674 /* If it is not a call to Thumb, assume call to Arm.
10675 If it is a call relative to a section name, then it is not a
10676 function call at all, but rather a long jump. Calls through
10677 the PLT do not require stubs. */
10678 if (branch_type == ST_BRANCH_TO_ARM && plt_offset == (bfd_vma) -1)
10680 if (globals->use_blx && r_type == R_ARM_THM_CALL)
10682 /* Convert BL to BLX. */
10683 lower_insn = (lower_insn & ~0x1000) | 0x0800;
10685 else if (( r_type != R_ARM_THM_CALL)
10686 && (r_type != R_ARM_THM_JUMP24))
10688 if (elf32_thumb_to_arm_stub
10689 (info, sym_name, input_bfd, output_bfd, input_section,
10690 hit_data, sym_sec, rel->r_offset, signed_addend, value,
10692 return bfd_reloc_ok;
10694 return bfd_reloc_dangerous;
10697 else if (branch_type == ST_BRANCH_TO_THUMB
10698 && globals->use_blx
10699 && r_type == R_ARM_THM_CALL)
10701 /* Make sure this is a BL. */
10702 lower_insn |= 0x1800;
10706 enum elf32_arm_stub_type stub_type = arm_stub_none;
10707 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
10709 /* Check if a stub has to be inserted because the destination
10711 struct elf32_arm_stub_hash_entry *stub_entry;
10712 struct elf32_arm_link_hash_entry *hash;
10714 hash = (struct elf32_arm_link_hash_entry *) h;
10716 stub_type = arm_type_of_stub (info, input_section, rel,
10717 st_type, &branch_type,
10718 hash, value, sym_sec,
10719 input_bfd, sym_name);
10721 if (stub_type != arm_stub_none)
10723 /* The target is out of reach or we are changing modes, so
10724 redirect the branch to the local stub for this
10726 stub_entry = elf32_arm_get_stub_entry (input_section,
10730 if (stub_entry != NULL)
10732 value = (stub_entry->stub_offset
10733 + stub_entry->stub_sec->output_offset
10734 + stub_entry->stub_sec->output_section->vma);
10736 if (plt_offset != (bfd_vma) -1)
10737 *unresolved_reloc_p = FALSE;
10740 /* If this call becomes a call to Arm, force BLX. */
10741 if (globals->use_blx && (r_type == R_ARM_THM_CALL))
10744 && !arm_stub_is_thumb (stub_entry->stub_type))
10745 || branch_type != ST_BRANCH_TO_THUMB)
10746 lower_insn = (lower_insn & ~0x1000) | 0x0800;
10751 /* Handle calls via the PLT. */
10752 if (stub_type == arm_stub_none && plt_offset != (bfd_vma) -1)
10754 value = (splt->output_section->vma
10755 + splt->output_offset
10758 if (globals->use_blx
10759 && r_type == R_ARM_THM_CALL
10760 && ! using_thumb_only (globals))
10762 /* If the Thumb BLX instruction is available, convert
10763 the BL to a BLX instruction to call the ARM-mode
10765 lower_insn = (lower_insn & ~0x1000) | 0x0800;
10766 branch_type = ST_BRANCH_TO_ARM;
10770 if (! using_thumb_only (globals))
10771 /* Target the Thumb stub before the ARM PLT entry. */
10772 value -= PLT_THUMB_STUB_SIZE;
10773 branch_type = ST_BRANCH_TO_THUMB;
10775 *unresolved_reloc_p = FALSE;
10778 relocation = value + signed_addend;
10780 relocation -= (input_section->output_section->vma
10781 + input_section->output_offset
10784 check = relocation >> howto->rightshift;
10786 /* If this is a signed value, the rightshift just dropped
10787 leading 1 bits (assuming twos complement). */
10788 if ((bfd_signed_vma) relocation >= 0)
10789 signed_check = check;
10791 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
10793 /* Calculate the permissable maximum and minimum values for
10794 this relocation according to whether we're relocating for
10796 bitsize = howto->bitsize;
10799 reloc_signed_max = (1 << (bitsize - 1)) - 1;
10800 reloc_signed_min = ~reloc_signed_max;
10802 /* Assumes two's complement. */
10803 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
10806 if ((lower_insn & 0x5000) == 0x4000)
10807 /* For a BLX instruction, make sure that the relocation is rounded up
10808 to a word boundary. This follows the semantics of the instruction
10809 which specifies that bit 1 of the target address will come from bit
10810 1 of the base address. */
10811 relocation = (relocation + 2) & ~ 3;
10813 /* Put RELOCATION back into the insn. Assumes two's complement.
10814 We use the Thumb-2 encoding, which is safe even if dealing with
10815 a Thumb-1 instruction by virtue of our overflow check above. */
10816 reloc_sign = (signed_check < 0) ? 1 : 0;
10817 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
10818 | ((relocation >> 12) & 0x3ff)
10819 | (reloc_sign << 10);
10820 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
10821 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
10822 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
10823 | ((relocation >> 1) & 0x7ff);
10825 /* Put the relocated value back in the object file: */
10826 bfd_put_16 (input_bfd, upper_insn, hit_data);
10827 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
10829 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
10833 case R_ARM_THM_JUMP19:
10834 /* Thumb32 conditional branch instruction. */
10836 bfd_vma relocation;
10837 bfd_boolean overflow = FALSE;
10838 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
10839 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
10840 bfd_signed_vma reloc_signed_max = 0xffffe;
10841 bfd_signed_vma reloc_signed_min = -0x100000;
10842 bfd_signed_vma signed_check;
10843 enum elf32_arm_stub_type stub_type = arm_stub_none;
10844 struct elf32_arm_stub_hash_entry *stub_entry;
10845 struct elf32_arm_link_hash_entry *hash;
10847 /* Need to refetch the addend, reconstruct the top three bits,
10848 and squish the two 11 bit pieces together. */
10849 if (globals->use_rel)
10851 bfd_vma S = (upper_insn & 0x0400) >> 10;
10852 bfd_vma upper = (upper_insn & 0x003f);
10853 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
10854 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
10855 bfd_vma lower = (lower_insn & 0x07ff);
10859 upper |= (!S) << 8;
10860 upper -= 0x0100; /* Sign extend. */
10862 addend = (upper << 12) | (lower << 1);
10863 signed_addend = addend;
10866 /* Handle calls via the PLT. */
10867 if (plt_offset != (bfd_vma) -1)
10869 value = (splt->output_section->vma
10870 + splt->output_offset
10872 /* Target the Thumb stub before the ARM PLT entry. */
10873 value -= PLT_THUMB_STUB_SIZE;
10874 *unresolved_reloc_p = FALSE;
10877 hash = (struct elf32_arm_link_hash_entry *)h;
10879 stub_type = arm_type_of_stub (info, input_section, rel,
10880 st_type, &branch_type,
10881 hash, value, sym_sec,
10882 input_bfd, sym_name);
10883 if (stub_type != arm_stub_none)
10885 stub_entry = elf32_arm_get_stub_entry (input_section,
10889 if (stub_entry != NULL)
10891 value = (stub_entry->stub_offset
10892 + stub_entry->stub_sec->output_offset
10893 + stub_entry->stub_sec->output_section->vma);
10897 relocation = value + signed_addend;
10898 relocation -= (input_section->output_section->vma
10899 + input_section->output_offset
10901 signed_check = (bfd_signed_vma) relocation;
10903 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
10906 /* Put RELOCATION back into the insn. */
10908 bfd_vma S = (relocation & 0x00100000) >> 20;
10909 bfd_vma J2 = (relocation & 0x00080000) >> 19;
10910 bfd_vma J1 = (relocation & 0x00040000) >> 18;
10911 bfd_vma hi = (relocation & 0x0003f000) >> 12;
10912 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
10914 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
10915 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
10918 /* Put the relocated value back in the object file: */
10919 bfd_put_16 (input_bfd, upper_insn, hit_data);
10920 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
10922 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
10925 case R_ARM_THM_JUMP11:
10926 case R_ARM_THM_JUMP8:
10927 case R_ARM_THM_JUMP6:
10928 /* Thumb B (branch) instruction). */
10930 bfd_signed_vma relocation;
10931 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
10932 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
10933 bfd_signed_vma signed_check;
10935 /* CZB cannot jump backward. */
10936 if (r_type == R_ARM_THM_JUMP6)
10937 reloc_signed_min = 0;
10939 if (globals->use_rel)
10941 /* Need to refetch addend. */
10942 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
10943 if (addend & ((howto->src_mask + 1) >> 1))
10945 signed_addend = -1;
10946 signed_addend &= ~ howto->src_mask;
10947 signed_addend |= addend;
10950 signed_addend = addend;
10951 /* The value in the insn has been right shifted. We need to
10952 undo this, so that we can perform the address calculation
10953 in terms of bytes. */
10954 signed_addend <<= howto->rightshift;
10956 relocation = value + signed_addend;
10958 relocation -= (input_section->output_section->vma
10959 + input_section->output_offset
10962 relocation >>= howto->rightshift;
10963 signed_check = relocation;
10965 if (r_type == R_ARM_THM_JUMP6)
10966 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
10968 relocation &= howto->dst_mask;
10969 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
10971 bfd_put_16 (input_bfd, relocation, hit_data);
10973 /* Assumes two's complement. */
10974 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
10975 return bfd_reloc_overflow;
10977 return bfd_reloc_ok;
10980 case R_ARM_ALU_PCREL7_0:
10981 case R_ARM_ALU_PCREL15_8:
10982 case R_ARM_ALU_PCREL23_15:
10985 bfd_vma relocation;
10987 insn = bfd_get_32 (input_bfd, hit_data);
10988 if (globals->use_rel)
10990 /* Extract the addend. */
10991 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
10992 signed_addend = addend;
10994 relocation = value + signed_addend;
10996 relocation -= (input_section->output_section->vma
10997 + input_section->output_offset
10999 insn = (insn & ~0xfff)
11000 | ((howto->bitpos << 7) & 0xf00)
11001 | ((relocation >> howto->bitpos) & 0xff);
11002 bfd_put_32 (input_bfd, value, hit_data);
11004 return bfd_reloc_ok;
11006 case R_ARM_GNU_VTINHERIT:
11007 case R_ARM_GNU_VTENTRY:
11008 return bfd_reloc_ok;
11010 case R_ARM_GOTOFF32:
11011 /* Relocation is relative to the start of the
11012 global offset table. */
11014 BFD_ASSERT (sgot != NULL);
11016 return bfd_reloc_notsupported;
11018 /* If we are addressing a Thumb function, we need to adjust the
11019 address by one, so that attempts to call the function pointer will
11020 correctly interpret it as Thumb code. */
11021 if (branch_type == ST_BRANCH_TO_THUMB)
11024 /* Note that sgot->output_offset is not involved in this
11025 calculation. We always want the start of .got. If we
11026 define _GLOBAL_OFFSET_TABLE in a different way, as is
11027 permitted by the ABI, we might have to change this
11029 value -= sgot->output_section->vma;
11030 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11031 contents, rel->r_offset, value,
11035 /* Use global offset table as symbol value. */
11036 BFD_ASSERT (sgot != NULL);
11039 return bfd_reloc_notsupported;
11041 *unresolved_reloc_p = FALSE;
11042 value = sgot->output_section->vma;
11043 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11044 contents, rel->r_offset, value,
11048 case R_ARM_GOT_PREL:
11049 /* Relocation is to the entry for this symbol in the
11050 global offset table. */
11052 return bfd_reloc_notsupported;
11054 if (dynreloc_st_type == STT_GNU_IFUNC
11055 && plt_offset != (bfd_vma) -1
11056 && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h)))
11058 /* We have a relocation against a locally-binding STT_GNU_IFUNC
11059 symbol, and the relocation resolves directly to the runtime
11060 target rather than to the .iplt entry. This means that any
11061 .got entry would be the same value as the .igot.plt entry,
11062 so there's no point creating both. */
11063 sgot = globals->root.igotplt;
11064 value = sgot->output_offset + gotplt_offset;
11066 else if (h != NULL)
11070 off = h->got.offset;
11071 BFD_ASSERT (off != (bfd_vma) -1);
11072 if ((off & 1) != 0)
11074 /* We have already processsed one GOT relocation against
11077 if (globals->root.dynamic_sections_created
11078 && !SYMBOL_REFERENCES_LOCAL (info, h))
11079 *unresolved_reloc_p = FALSE;
11083 Elf_Internal_Rela outrel;
11085 if (h->dynindx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))
11087 /* If the symbol doesn't resolve locally in a static
11088 object, we have an undefined reference. If the
11089 symbol doesn't resolve locally in a dynamic object,
11090 it should be resolved by the dynamic linker. */
11091 if (globals->root.dynamic_sections_created)
11093 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
11094 *unresolved_reloc_p = FALSE;
11098 outrel.r_addend = 0;
11102 if (dynreloc_st_type == STT_GNU_IFUNC)
11103 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
11104 else if (bfd_link_pic (info)
11105 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
11106 || h->root.type != bfd_link_hash_undefweak))
11107 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
11110 outrel.r_addend = dynreloc_value;
11113 /* The GOT entry is initialized to zero by default.
11114 See if we should install a different value. */
11115 if (outrel.r_addend != 0
11116 && (outrel.r_info == 0 || globals->use_rel))
11118 bfd_put_32 (output_bfd, outrel.r_addend,
11119 sgot->contents + off);
11120 outrel.r_addend = 0;
11123 if (outrel.r_info != 0)
11125 outrel.r_offset = (sgot->output_section->vma
11126 + sgot->output_offset
11128 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
11130 h->got.offset |= 1;
11132 value = sgot->output_offset + off;
11138 BFD_ASSERT (local_got_offsets != NULL
11139 && local_got_offsets[r_symndx] != (bfd_vma) -1);
11141 off = local_got_offsets[r_symndx];
11143 /* The offset must always be a multiple of 4. We use the
11144 least significant bit to record whether we have already
11145 generated the necessary reloc. */
11146 if ((off & 1) != 0)
11150 if (globals->use_rel)
11151 bfd_put_32 (output_bfd, dynreloc_value, sgot->contents + off);
11153 if (bfd_link_pic (info) || dynreloc_st_type == STT_GNU_IFUNC)
11155 Elf_Internal_Rela outrel;
11157 outrel.r_addend = addend + dynreloc_value;
11158 outrel.r_offset = (sgot->output_section->vma
11159 + sgot->output_offset
11161 if (dynreloc_st_type == STT_GNU_IFUNC)
11162 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
11164 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
11165 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
11168 local_got_offsets[r_symndx] |= 1;
11171 value = sgot->output_offset + off;
11173 if (r_type != R_ARM_GOT32)
11174 value += sgot->output_section->vma;
11176 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11177 contents, rel->r_offset, value,
11180 case R_ARM_TLS_LDO32:
11181 value = value - dtpoff_base (info);
11183 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11184 contents, rel->r_offset, value,
11187 case R_ARM_TLS_LDM32:
11194 off = globals->tls_ldm_got.offset;
11196 if ((off & 1) != 0)
11200 /* If we don't know the module number, create a relocation
11202 if (bfd_link_pic (info))
11204 Elf_Internal_Rela outrel;
11206 if (srelgot == NULL)
11209 outrel.r_addend = 0;
11210 outrel.r_offset = (sgot->output_section->vma
11211 + sgot->output_offset + off);
11212 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
11214 if (globals->use_rel)
11215 bfd_put_32 (output_bfd, outrel.r_addend,
11216 sgot->contents + off);
11218 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
11221 bfd_put_32 (output_bfd, 1, sgot->contents + off);
11223 globals->tls_ldm_got.offset |= 1;
11226 value = sgot->output_section->vma + sgot->output_offset + off
11227 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
11229 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11230 contents, rel->r_offset, value,
11234 case R_ARM_TLS_CALL:
11235 case R_ARM_THM_TLS_CALL:
11236 case R_ARM_TLS_GD32:
11237 case R_ARM_TLS_IE32:
11238 case R_ARM_TLS_GOTDESC:
11239 case R_ARM_TLS_DESCSEQ:
11240 case R_ARM_THM_TLS_DESCSEQ:
11242 bfd_vma off, offplt;
11246 BFD_ASSERT (sgot != NULL);
11251 dyn = globals->root.dynamic_sections_created;
11252 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
11253 bfd_link_pic (info),
11255 && (!bfd_link_pic (info)
11256 || !SYMBOL_REFERENCES_LOCAL (info, h)))
11258 *unresolved_reloc_p = FALSE;
11261 off = h->got.offset;
11262 offplt = elf32_arm_hash_entry (h)->tlsdesc_got;
11263 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
11267 BFD_ASSERT (local_got_offsets != NULL);
11268 off = local_got_offsets[r_symndx];
11269 offplt = local_tlsdesc_gotents[r_symndx];
11270 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
11273 /* Linker relaxations happens from one of the
11274 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
11275 if (ELF32_R_TYPE(rel->r_info) != r_type)
11276 tls_type = GOT_TLS_IE;
11278 BFD_ASSERT (tls_type != GOT_UNKNOWN);
11280 if ((off & 1) != 0)
11284 bfd_boolean need_relocs = FALSE;
11285 Elf_Internal_Rela outrel;
11288 /* The GOT entries have not been initialized yet. Do it
11289 now, and emit any relocations. If both an IE GOT and a
11290 GD GOT are necessary, we emit the GD first. */
11292 if ((bfd_link_pic (info) || indx != 0)
11294 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
11295 || h->root.type != bfd_link_hash_undefweak))
11297 need_relocs = TRUE;
11298 BFD_ASSERT (srelgot != NULL);
11301 if (tls_type & GOT_TLS_GDESC)
11305 /* We should have relaxed, unless this is an undefined
11307 BFD_ASSERT ((h && (h->root.type == bfd_link_hash_undefweak))
11308 || bfd_link_pic (info));
11309 BFD_ASSERT (globals->sgotplt_jump_table_size + offplt + 8
11310 <= globals->root.sgotplt->size);
11312 outrel.r_addend = 0;
11313 outrel.r_offset = (globals->root.sgotplt->output_section->vma
11314 + globals->root.sgotplt->output_offset
11316 + globals->sgotplt_jump_table_size);
11318 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DESC);
11319 sreloc = globals->root.srelplt;
11320 loc = sreloc->contents;
11321 loc += globals->next_tls_desc_index++ * RELOC_SIZE (globals);
11322 BFD_ASSERT (loc + RELOC_SIZE (globals)
11323 <= sreloc->contents + sreloc->size);
11325 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
11327 /* For globals, the first word in the relocation gets
11328 the relocation index and the top bit set, or zero,
11329 if we're binding now. For locals, it gets the
11330 symbol's offset in the tls section. */
11331 bfd_put_32 (output_bfd,
11332 !h ? value - elf_hash_table (info)->tls_sec->vma
11333 : info->flags & DF_BIND_NOW ? 0
11334 : 0x80000000 | ELF32_R_SYM (outrel.r_info),
11335 globals->root.sgotplt->contents + offplt
11336 + globals->sgotplt_jump_table_size);
11338 /* Second word in the relocation is always zero. */
11339 bfd_put_32 (output_bfd, 0,
11340 globals->root.sgotplt->contents + offplt
11341 + globals->sgotplt_jump_table_size + 4);
11343 if (tls_type & GOT_TLS_GD)
11347 outrel.r_addend = 0;
11348 outrel.r_offset = (sgot->output_section->vma
11349 + sgot->output_offset
11351 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
11353 if (globals->use_rel)
11354 bfd_put_32 (output_bfd, outrel.r_addend,
11355 sgot->contents + cur_off);
11357 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
11360 bfd_put_32 (output_bfd, value - dtpoff_base (info),
11361 sgot->contents + cur_off + 4);
11364 outrel.r_addend = 0;
11365 outrel.r_info = ELF32_R_INFO (indx,
11366 R_ARM_TLS_DTPOFF32);
11367 outrel.r_offset += 4;
11369 if (globals->use_rel)
11370 bfd_put_32 (output_bfd, outrel.r_addend,
11371 sgot->contents + cur_off + 4);
11373 elf32_arm_add_dynreloc (output_bfd, info,
11379 /* If we are not emitting relocations for a
11380 general dynamic reference, then we must be in a
11381 static link or an executable link with the
11382 symbol binding locally. Mark it as belonging
11383 to module 1, the executable. */
11384 bfd_put_32 (output_bfd, 1,
11385 sgot->contents + cur_off);
11386 bfd_put_32 (output_bfd, value - dtpoff_base (info),
11387 sgot->contents + cur_off + 4);
11393 if (tls_type & GOT_TLS_IE)
11398 outrel.r_addend = value - dtpoff_base (info);
11400 outrel.r_addend = 0;
11401 outrel.r_offset = (sgot->output_section->vma
11402 + sgot->output_offset
11404 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
11406 if (globals->use_rel)
11407 bfd_put_32 (output_bfd, outrel.r_addend,
11408 sgot->contents + cur_off);
11410 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
11413 bfd_put_32 (output_bfd, tpoff (info, value),
11414 sgot->contents + cur_off);
11419 h->got.offset |= 1;
11421 local_got_offsets[r_symndx] |= 1;
11424 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
11426 else if (tls_type & GOT_TLS_GDESC)
11429 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL
11430 || ELF32_R_TYPE(rel->r_info) == R_ARM_THM_TLS_CALL)
11432 bfd_signed_vma offset;
11433 /* TLS stubs are arm mode. The original symbol is a
11434 data object, so branch_type is bogus. */
11435 branch_type = ST_BRANCH_TO_ARM;
11436 enum elf32_arm_stub_type stub_type
11437 = arm_type_of_stub (info, input_section, rel,
11438 st_type, &branch_type,
11439 (struct elf32_arm_link_hash_entry *)h,
11440 globals->tls_trampoline, globals->root.splt,
11441 input_bfd, sym_name);
11443 if (stub_type != arm_stub_none)
11445 struct elf32_arm_stub_hash_entry *stub_entry
11446 = elf32_arm_get_stub_entry
11447 (input_section, globals->root.splt, 0, rel,
11448 globals, stub_type);
11449 offset = (stub_entry->stub_offset
11450 + stub_entry->stub_sec->output_offset
11451 + stub_entry->stub_sec->output_section->vma);
11454 offset = (globals->root.splt->output_section->vma
11455 + globals->root.splt->output_offset
11456 + globals->tls_trampoline);
11458 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL)
11460 unsigned long inst;
11462 offset -= (input_section->output_section->vma
11463 + input_section->output_offset
11464 + rel->r_offset + 8);
11466 inst = offset >> 2;
11467 inst &= 0x00ffffff;
11468 value = inst | (globals->use_blx ? 0xfa000000 : 0xeb000000);
11472 /* Thumb blx encodes the offset in a complicated
11474 unsigned upper_insn, lower_insn;
11477 offset -= (input_section->output_section->vma
11478 + input_section->output_offset
11479 + rel->r_offset + 4);
11481 if (stub_type != arm_stub_none
11482 && arm_stub_is_thumb (stub_type))
11484 lower_insn = 0xd000;
11488 lower_insn = 0xc000;
11489 /* Round up the offset to a word boundary. */
11490 offset = (offset + 2) & ~2;
11494 upper_insn = (0xf000
11495 | ((offset >> 12) & 0x3ff)
11497 lower_insn |= (((!((offset >> 23) & 1)) ^ neg) << 13)
11498 | (((!((offset >> 22) & 1)) ^ neg) << 11)
11499 | ((offset >> 1) & 0x7ff);
11500 bfd_put_16 (input_bfd, upper_insn, hit_data);
11501 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
11502 return bfd_reloc_ok;
11505 /* These relocations needs special care, as besides the fact
11506 they point somewhere in .gotplt, the addend must be
11507 adjusted accordingly depending on the type of instruction
11509 else if ((r_type == R_ARM_TLS_GOTDESC) && (tls_type & GOT_TLS_GDESC))
11511 unsigned long data, insn;
11514 data = bfd_get_32 (input_bfd, hit_data);
11520 insn = bfd_get_16 (input_bfd, contents + rel->r_offset - data);
11521 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
11522 insn = (insn << 16)
11523 | bfd_get_16 (input_bfd,
11524 contents + rel->r_offset - data + 2);
11525 if ((insn & 0xf800c000) == 0xf000c000)
11528 else if ((insn & 0xffffff00) == 0x4400)
11533 (*_bfd_error_handler)
11534 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
11535 input_bfd, input_section,
11536 (unsigned long)rel->r_offset, insn);
11537 return bfd_reloc_notsupported;
11542 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - data);
11544 switch (insn >> 24)
11546 case 0xeb: /* bl */
11547 case 0xfa: /* blx */
11551 case 0xe0: /* add */
11556 (*_bfd_error_handler)
11557 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
11558 input_bfd, input_section,
11559 (unsigned long)rel->r_offset, insn);
11560 return bfd_reloc_notsupported;
11564 value += ((globals->root.sgotplt->output_section->vma
11565 + globals->root.sgotplt->output_offset + off)
11566 - (input_section->output_section->vma
11567 + input_section->output_offset
11569 + globals->sgotplt_jump_table_size);
11572 value = ((globals->root.sgot->output_section->vma
11573 + globals->root.sgot->output_offset + off)
11574 - (input_section->output_section->vma
11575 + input_section->output_offset + rel->r_offset));
11577 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11578 contents, rel->r_offset, value,
11582 case R_ARM_TLS_LE32:
11583 if (bfd_link_dll (info))
11585 (*_bfd_error_handler)
11586 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
11587 input_bfd, input_section,
11588 (long) rel->r_offset, howto->name);
11589 return bfd_reloc_notsupported;
11592 value = tpoff (info, value);
11594 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11595 contents, rel->r_offset, value,
11599 if (globals->fix_v4bx)
11601 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11603 /* Ensure that we have a BX instruction. */
11604 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
11606 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
11608 /* Branch to veneer. */
11610 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
11611 glue_addr -= input_section->output_section->vma
11612 + input_section->output_offset
11613 + rel->r_offset + 8;
11614 insn = (insn & 0xf0000000) | 0x0a000000
11615 | ((glue_addr >> 2) & 0x00ffffff);
11619 /* Preserve Rm (lowest four bits) and the condition code
11620 (highest four bits). Other bits encode MOV PC,Rm. */
11621 insn = (insn & 0xf000000f) | 0x01a0f000;
11624 bfd_put_32 (input_bfd, insn, hit_data);
11626 return bfd_reloc_ok;
11628 case R_ARM_MOVW_ABS_NC:
11629 case R_ARM_MOVT_ABS:
11630 case R_ARM_MOVW_PREL_NC:
11631 case R_ARM_MOVT_PREL:
11632 /* Until we properly support segment-base-relative addressing then
11633 we assume the segment base to be zero, as for the group relocations.
11634 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
11635 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
11636 case R_ARM_MOVW_BREL_NC:
11637 case R_ARM_MOVW_BREL:
11638 case R_ARM_MOVT_BREL:
11640 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11642 if (globals->use_rel)
11644 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
11645 signed_addend = (addend ^ 0x8000) - 0x8000;
11648 value += signed_addend;
11650 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
11651 value -= (input_section->output_section->vma
11652 + input_section->output_offset + rel->r_offset);
11654 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
11655 return bfd_reloc_overflow;
11657 if (branch_type == ST_BRANCH_TO_THUMB)
11660 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
11661 || r_type == R_ARM_MOVT_BREL)
11664 insn &= 0xfff0f000;
11665 insn |= value & 0xfff;
11666 insn |= (value & 0xf000) << 4;
11667 bfd_put_32 (input_bfd, insn, hit_data);
11669 return bfd_reloc_ok;
11671 case R_ARM_THM_MOVW_ABS_NC:
11672 case R_ARM_THM_MOVT_ABS:
11673 case R_ARM_THM_MOVW_PREL_NC:
11674 case R_ARM_THM_MOVT_PREL:
11675 /* Until we properly support segment-base-relative addressing then
11676 we assume the segment base to be zero, as for the above relocations.
11677 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
11678 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
11679 as R_ARM_THM_MOVT_ABS. */
11680 case R_ARM_THM_MOVW_BREL_NC:
11681 case R_ARM_THM_MOVW_BREL:
11682 case R_ARM_THM_MOVT_BREL:
11686 insn = bfd_get_16 (input_bfd, hit_data) << 16;
11687 insn |= bfd_get_16 (input_bfd, hit_data + 2);
11689 if (globals->use_rel)
11691 addend = ((insn >> 4) & 0xf000)
11692 | ((insn >> 15) & 0x0800)
11693 | ((insn >> 4) & 0x0700)
11695 signed_addend = (addend ^ 0x8000) - 0x8000;
11698 value += signed_addend;
11700 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
11701 value -= (input_section->output_section->vma
11702 + input_section->output_offset + rel->r_offset);
11704 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
11705 return bfd_reloc_overflow;
11707 if (branch_type == ST_BRANCH_TO_THUMB)
11710 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
11711 || r_type == R_ARM_THM_MOVT_BREL)
11714 insn &= 0xfbf08f00;
11715 insn |= (value & 0xf000) << 4;
11716 insn |= (value & 0x0800) << 15;
11717 insn |= (value & 0x0700) << 4;
11718 insn |= (value & 0x00ff);
11720 bfd_put_16 (input_bfd, insn >> 16, hit_data);
11721 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
11723 return bfd_reloc_ok;
11725 case R_ARM_ALU_PC_G0_NC:
11726 case R_ARM_ALU_PC_G1_NC:
11727 case R_ARM_ALU_PC_G0:
11728 case R_ARM_ALU_PC_G1:
11729 case R_ARM_ALU_PC_G2:
11730 case R_ARM_ALU_SB_G0_NC:
11731 case R_ARM_ALU_SB_G1_NC:
11732 case R_ARM_ALU_SB_G0:
11733 case R_ARM_ALU_SB_G1:
11734 case R_ARM_ALU_SB_G2:
11736 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11737 bfd_vma pc = input_section->output_section->vma
11738 + input_section->output_offset + rel->r_offset;
11739 /* sb is the origin of the *segment* containing the symbol. */
11740 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11743 bfd_signed_vma signed_value;
11746 /* Determine which group of bits to select. */
11749 case R_ARM_ALU_PC_G0_NC:
11750 case R_ARM_ALU_PC_G0:
11751 case R_ARM_ALU_SB_G0_NC:
11752 case R_ARM_ALU_SB_G0:
11756 case R_ARM_ALU_PC_G1_NC:
11757 case R_ARM_ALU_PC_G1:
11758 case R_ARM_ALU_SB_G1_NC:
11759 case R_ARM_ALU_SB_G1:
11763 case R_ARM_ALU_PC_G2:
11764 case R_ARM_ALU_SB_G2:
11772 /* If REL, extract the addend from the insn. If RELA, it will
11773 have already been fetched for us. */
11774 if (globals->use_rel)
11777 bfd_vma constant = insn & 0xff;
11778 bfd_vma rotation = (insn & 0xf00) >> 8;
11781 signed_addend = constant;
11784 /* Compensate for the fact that in the instruction, the
11785 rotation is stored in multiples of 2 bits. */
11788 /* Rotate "constant" right by "rotation" bits. */
11789 signed_addend = (constant >> rotation) |
11790 (constant << (8 * sizeof (bfd_vma) - rotation));
11793 /* Determine if the instruction is an ADD or a SUB.
11794 (For REL, this determines the sign of the addend.) */
11795 negative = identify_add_or_sub (insn);
11798 (*_bfd_error_handler)
11799 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
11800 input_bfd, input_section,
11801 (long) rel->r_offset, howto->name);
11802 return bfd_reloc_overflow;
11805 signed_addend *= negative;
11808 /* Compute the value (X) to go in the place. */
11809 if (r_type == R_ARM_ALU_PC_G0_NC
11810 || r_type == R_ARM_ALU_PC_G1_NC
11811 || r_type == R_ARM_ALU_PC_G0
11812 || r_type == R_ARM_ALU_PC_G1
11813 || r_type == R_ARM_ALU_PC_G2)
11815 signed_value = value - pc + signed_addend;
11817 /* Section base relative. */
11818 signed_value = value - sb + signed_addend;
11820 /* If the target symbol is a Thumb function, then set the
11821 Thumb bit in the address. */
11822 if (branch_type == ST_BRANCH_TO_THUMB)
11825 /* Calculate the value of the relevant G_n, in encoded
11826 constant-with-rotation format. */
11827 g_n = calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11830 /* Check for overflow if required. */
11831 if ((r_type == R_ARM_ALU_PC_G0
11832 || r_type == R_ARM_ALU_PC_G1
11833 || r_type == R_ARM_ALU_PC_G2
11834 || r_type == R_ARM_ALU_SB_G0
11835 || r_type == R_ARM_ALU_SB_G1
11836 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
11838 (*_bfd_error_handler)
11839 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11840 input_bfd, input_section,
11841 (long) rel->r_offset, signed_value < 0 ? - signed_value : signed_value,
11843 return bfd_reloc_overflow;
11846 /* Mask out the value and the ADD/SUB part of the opcode; take care
11847 not to destroy the S bit. */
11848 insn &= 0xff1ff000;
11850 /* Set the opcode according to whether the value to go in the
11851 place is negative. */
11852 if (signed_value < 0)
11857 /* Encode the offset. */
11860 bfd_put_32 (input_bfd, insn, hit_data);
11862 return bfd_reloc_ok;
11864 case R_ARM_LDR_PC_G0:
11865 case R_ARM_LDR_PC_G1:
11866 case R_ARM_LDR_PC_G2:
11867 case R_ARM_LDR_SB_G0:
11868 case R_ARM_LDR_SB_G1:
11869 case R_ARM_LDR_SB_G2:
11871 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11872 bfd_vma pc = input_section->output_section->vma
11873 + input_section->output_offset + rel->r_offset;
11874 /* sb is the origin of the *segment* containing the symbol. */
11875 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11877 bfd_signed_vma signed_value;
11880 /* Determine which groups of bits to calculate. */
11883 case R_ARM_LDR_PC_G0:
11884 case R_ARM_LDR_SB_G0:
11888 case R_ARM_LDR_PC_G1:
11889 case R_ARM_LDR_SB_G1:
11893 case R_ARM_LDR_PC_G2:
11894 case R_ARM_LDR_SB_G2:
11902 /* If REL, extract the addend from the insn. If RELA, it will
11903 have already been fetched for us. */
11904 if (globals->use_rel)
11906 int negative = (insn & (1 << 23)) ? 1 : -1;
11907 signed_addend = negative * (insn & 0xfff);
11910 /* Compute the value (X) to go in the place. */
11911 if (r_type == R_ARM_LDR_PC_G0
11912 || r_type == R_ARM_LDR_PC_G1
11913 || r_type == R_ARM_LDR_PC_G2)
11915 signed_value = value - pc + signed_addend;
11917 /* Section base relative. */
11918 signed_value = value - sb + signed_addend;
11920 /* Calculate the value of the relevant G_{n-1} to obtain
11921 the residual at that stage. */
11922 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11923 group - 1, &residual);
11925 /* Check for overflow. */
11926 if (residual >= 0x1000)
11928 (*_bfd_error_handler)
11929 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11930 input_bfd, input_section,
11931 (long) rel->r_offset, labs (signed_value), howto->name);
11932 return bfd_reloc_overflow;
11935 /* Mask out the value and U bit. */
11936 insn &= 0xff7ff000;
11938 /* Set the U bit if the value to go in the place is non-negative. */
11939 if (signed_value >= 0)
11942 /* Encode the offset. */
11945 bfd_put_32 (input_bfd, insn, hit_data);
11947 return bfd_reloc_ok;
11949 case R_ARM_LDRS_PC_G0:
11950 case R_ARM_LDRS_PC_G1:
11951 case R_ARM_LDRS_PC_G2:
11952 case R_ARM_LDRS_SB_G0:
11953 case R_ARM_LDRS_SB_G1:
11954 case R_ARM_LDRS_SB_G2:
11956 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11957 bfd_vma pc = input_section->output_section->vma
11958 + input_section->output_offset + rel->r_offset;
11959 /* sb is the origin of the *segment* containing the symbol. */
11960 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11962 bfd_signed_vma signed_value;
11965 /* Determine which groups of bits to calculate. */
11968 case R_ARM_LDRS_PC_G0:
11969 case R_ARM_LDRS_SB_G0:
11973 case R_ARM_LDRS_PC_G1:
11974 case R_ARM_LDRS_SB_G1:
11978 case R_ARM_LDRS_PC_G2:
11979 case R_ARM_LDRS_SB_G2:
11987 /* If REL, extract the addend from the insn. If RELA, it will
11988 have already been fetched for us. */
11989 if (globals->use_rel)
11991 int negative = (insn & (1 << 23)) ? 1 : -1;
11992 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
11995 /* Compute the value (X) to go in the place. */
11996 if (r_type == R_ARM_LDRS_PC_G0
11997 || r_type == R_ARM_LDRS_PC_G1
11998 || r_type == R_ARM_LDRS_PC_G2)
12000 signed_value = value - pc + signed_addend;
12002 /* Section base relative. */
12003 signed_value = value - sb + signed_addend;
12005 /* Calculate the value of the relevant G_{n-1} to obtain
12006 the residual at that stage. */
12007 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
12008 group - 1, &residual);
12010 /* Check for overflow. */
12011 if (residual >= 0x100)
12013 (*_bfd_error_handler)
12014 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
12015 input_bfd, input_section,
12016 (long) rel->r_offset, labs (signed_value), howto->name);
12017 return bfd_reloc_overflow;
12020 /* Mask out the value and U bit. */
12021 insn &= 0xff7ff0f0;
12023 /* Set the U bit if the value to go in the place is non-negative. */
12024 if (signed_value >= 0)
12027 /* Encode the offset. */
12028 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
12030 bfd_put_32 (input_bfd, insn, hit_data);
12032 return bfd_reloc_ok;
12034 case R_ARM_LDC_PC_G0:
12035 case R_ARM_LDC_PC_G1:
12036 case R_ARM_LDC_PC_G2:
12037 case R_ARM_LDC_SB_G0:
12038 case R_ARM_LDC_SB_G1:
12039 case R_ARM_LDC_SB_G2:
12041 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
12042 bfd_vma pc = input_section->output_section->vma
12043 + input_section->output_offset + rel->r_offset;
12044 /* sb is the origin of the *segment* containing the symbol. */
12045 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
12047 bfd_signed_vma signed_value;
12050 /* Determine which groups of bits to calculate. */
12053 case R_ARM_LDC_PC_G0:
12054 case R_ARM_LDC_SB_G0:
12058 case R_ARM_LDC_PC_G1:
12059 case R_ARM_LDC_SB_G1:
12063 case R_ARM_LDC_PC_G2:
12064 case R_ARM_LDC_SB_G2:
12072 /* If REL, extract the addend from the insn. If RELA, it will
12073 have already been fetched for us. */
12074 if (globals->use_rel)
12076 int negative = (insn & (1 << 23)) ? 1 : -1;
12077 signed_addend = negative * ((insn & 0xff) << 2);
12080 /* Compute the value (X) to go in the place. */
12081 if (r_type == R_ARM_LDC_PC_G0
12082 || r_type == R_ARM_LDC_PC_G1
12083 || r_type == R_ARM_LDC_PC_G2)
12085 signed_value = value - pc + signed_addend;
12087 /* Section base relative. */
12088 signed_value = value - sb + signed_addend;
12090 /* Calculate the value of the relevant G_{n-1} to obtain
12091 the residual at that stage. */
12092 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
12093 group - 1, &residual);
12095 /* Check for overflow. (The absolute value to go in the place must be
12096 divisible by four and, after having been divided by four, must
12097 fit in eight bits.) */
12098 if ((residual & 0x3) != 0 || residual >= 0x400)
12100 (*_bfd_error_handler)
12101 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
12102 input_bfd, input_section,
12103 (long) rel->r_offset, labs (signed_value), howto->name);
12104 return bfd_reloc_overflow;
12107 /* Mask out the value and U bit. */
12108 insn &= 0xff7fff00;
12110 /* Set the U bit if the value to go in the place is non-negative. */
12111 if (signed_value >= 0)
12114 /* Encode the offset. */
12115 insn |= residual >> 2;
12117 bfd_put_32 (input_bfd, insn, hit_data);
12119 return bfd_reloc_ok;
12121 case R_ARM_THM_ALU_ABS_G0_NC:
12122 case R_ARM_THM_ALU_ABS_G1_NC:
12123 case R_ARM_THM_ALU_ABS_G2_NC:
12124 case R_ARM_THM_ALU_ABS_G3_NC:
12126 const int shift_array[4] = {0, 8, 16, 24};
12127 bfd_vma insn = bfd_get_16 (input_bfd, hit_data);
12128 bfd_vma addr = value;
12129 int shift = shift_array[r_type - R_ARM_THM_ALU_ABS_G0_NC];
12131 /* Compute address. */
12132 if (globals->use_rel)
12133 signed_addend = insn & 0xff;
12134 addr += signed_addend;
12135 if (branch_type == ST_BRANCH_TO_THUMB)
12137 /* Clean imm8 insn. */
12139 /* And update with correct part of address. */
12140 insn |= (addr >> shift) & 0xff;
12142 bfd_put_16 (input_bfd, insn, hit_data);
12145 *unresolved_reloc_p = FALSE;
12146 return bfd_reloc_ok;
12149 return bfd_reloc_notsupported;
12153 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
12155 arm_add_to_rel (bfd * abfd,
12156 bfd_byte * address,
12157 reloc_howto_type * howto,
12158 bfd_signed_vma increment)
12160 bfd_signed_vma addend;
12162 if (howto->type == R_ARM_THM_CALL
12163 || howto->type == R_ARM_THM_JUMP24)
12165 int upper_insn, lower_insn;
12168 upper_insn = bfd_get_16 (abfd, address);
12169 lower_insn = bfd_get_16 (abfd, address + 2);
12170 upper = upper_insn & 0x7ff;
12171 lower = lower_insn & 0x7ff;
12173 addend = (upper << 12) | (lower << 1);
12174 addend += increment;
12177 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
12178 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
12180 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
12181 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
12187 contents = bfd_get_32 (abfd, address);
12189 /* Get the (signed) value from the instruction. */
12190 addend = contents & howto->src_mask;
12191 if (addend & ((howto->src_mask + 1) >> 1))
12193 bfd_signed_vma mask;
12196 mask &= ~ howto->src_mask;
12200 /* Add in the increment, (which is a byte value). */
12201 switch (howto->type)
12204 addend += increment;
12211 addend <<= howto->size;
12212 addend += increment;
12214 /* Should we check for overflow here ? */
12216 /* Drop any undesired bits. */
12217 addend >>= howto->rightshift;
12221 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
12223 bfd_put_32 (abfd, contents, address);
12227 #define IS_ARM_TLS_RELOC(R_TYPE) \
12228 ((R_TYPE) == R_ARM_TLS_GD32 \
12229 || (R_TYPE) == R_ARM_TLS_LDO32 \
12230 || (R_TYPE) == R_ARM_TLS_LDM32 \
12231 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
12232 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
12233 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
12234 || (R_TYPE) == R_ARM_TLS_LE32 \
12235 || (R_TYPE) == R_ARM_TLS_IE32 \
12236 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
12238 /* Specific set of relocations for the gnu tls dialect. */
12239 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
12240 ((R_TYPE) == R_ARM_TLS_GOTDESC \
12241 || (R_TYPE) == R_ARM_TLS_CALL \
12242 || (R_TYPE) == R_ARM_THM_TLS_CALL \
12243 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
12244 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
12246 /* Relocate an ARM ELF section. */
12249 elf32_arm_relocate_section (bfd * output_bfd,
12250 struct bfd_link_info * info,
12252 asection * input_section,
12253 bfd_byte * contents,
12254 Elf_Internal_Rela * relocs,
12255 Elf_Internal_Sym * local_syms,
12256 asection ** local_sections)
12258 Elf_Internal_Shdr *symtab_hdr;
12259 struct elf_link_hash_entry **sym_hashes;
12260 Elf_Internal_Rela *rel;
12261 Elf_Internal_Rela *relend;
12263 struct elf32_arm_link_hash_table * globals;
12265 globals = elf32_arm_hash_table (info);
12266 if (globals == NULL)
12269 symtab_hdr = & elf_symtab_hdr (input_bfd);
12270 sym_hashes = elf_sym_hashes (input_bfd);
12273 relend = relocs + input_section->reloc_count;
12274 for (; rel < relend; rel++)
12277 reloc_howto_type * howto;
12278 unsigned long r_symndx;
12279 Elf_Internal_Sym * sym;
12281 struct elf_link_hash_entry * h;
12282 bfd_vma relocation;
12283 bfd_reloc_status_type r;
12286 bfd_boolean unresolved_reloc = FALSE;
12287 char *error_message = NULL;
12289 r_symndx = ELF32_R_SYM (rel->r_info);
12290 r_type = ELF32_R_TYPE (rel->r_info);
12291 r_type = arm_real_reloc_type (globals, r_type);
12293 if ( r_type == R_ARM_GNU_VTENTRY
12294 || r_type == R_ARM_GNU_VTINHERIT)
12297 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
12298 howto = bfd_reloc.howto;
12304 if (r_symndx < symtab_hdr->sh_info)
12306 sym = local_syms + r_symndx;
12307 sym_type = ELF32_ST_TYPE (sym->st_info);
12308 sec = local_sections[r_symndx];
12310 /* An object file might have a reference to a local
12311 undefined symbol. This is a daft object file, but we
12312 should at least do something about it. V4BX & NONE
12313 relocations do not use the symbol and are explicitly
12314 allowed to use the undefined symbol, so allow those.
12315 Likewise for relocations against STN_UNDEF. */
12316 if (r_type != R_ARM_V4BX
12317 && r_type != R_ARM_NONE
12318 && r_symndx != STN_UNDEF
12319 && bfd_is_und_section (sec)
12320 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
12321 (*info->callbacks->undefined_symbol)
12322 (info, bfd_elf_string_from_elf_section
12323 (input_bfd, symtab_hdr->sh_link, sym->st_name),
12324 input_bfd, input_section,
12325 rel->r_offset, TRUE);
12327 if (globals->use_rel)
12329 relocation = (sec->output_section->vma
12330 + sec->output_offset
12332 if (!bfd_link_relocatable (info)
12333 && (sec->flags & SEC_MERGE)
12334 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12337 bfd_vma addend, value;
12341 case R_ARM_MOVW_ABS_NC:
12342 case R_ARM_MOVT_ABS:
12343 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
12344 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
12345 addend = (addend ^ 0x8000) - 0x8000;
12348 case R_ARM_THM_MOVW_ABS_NC:
12349 case R_ARM_THM_MOVT_ABS:
12350 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
12352 value |= bfd_get_16 (input_bfd,
12353 contents + rel->r_offset + 2);
12354 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
12355 | ((value & 0x04000000) >> 15);
12356 addend = (addend ^ 0x8000) - 0x8000;
12360 if (howto->rightshift
12361 || (howto->src_mask & (howto->src_mask + 1)))
12363 (*_bfd_error_handler)
12364 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
12365 input_bfd, input_section,
12366 (long) rel->r_offset, howto->name);
12370 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
12372 /* Get the (signed) value from the instruction. */
12373 addend = value & howto->src_mask;
12374 if (addend & ((howto->src_mask + 1) >> 1))
12376 bfd_signed_vma mask;
12379 mask &= ~ howto->src_mask;
12387 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
12389 addend += msec->output_section->vma + msec->output_offset;
12391 /* Cases here must match those in the preceding
12392 switch statement. */
12395 case R_ARM_MOVW_ABS_NC:
12396 case R_ARM_MOVT_ABS:
12397 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
12398 | (addend & 0xfff);
12399 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
12402 case R_ARM_THM_MOVW_ABS_NC:
12403 case R_ARM_THM_MOVT_ABS:
12404 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
12405 | (addend & 0xff) | ((addend & 0x0800) << 15);
12406 bfd_put_16 (input_bfd, value >> 16,
12407 contents + rel->r_offset);
12408 bfd_put_16 (input_bfd, value,
12409 contents + rel->r_offset + 2);
12413 value = (value & ~ howto->dst_mask)
12414 | (addend & howto->dst_mask);
12415 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
12421 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12425 bfd_boolean warned, ignored;
12427 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12428 r_symndx, symtab_hdr, sym_hashes,
12429 h, sec, relocation,
12430 unresolved_reloc, warned, ignored);
12432 sym_type = h->type;
12435 if (sec != NULL && discarded_section (sec))
12436 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12437 rel, 1, relend, howto, 0, contents);
12439 if (bfd_link_relocatable (info))
12441 /* This is a relocatable link. We don't have to change
12442 anything, unless the reloc is against a section symbol,
12443 in which case we have to adjust according to where the
12444 section symbol winds up in the output section. */
12445 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12447 if (globals->use_rel)
12448 arm_add_to_rel (input_bfd, contents + rel->r_offset,
12449 howto, (bfd_signed_vma) sec->output_offset);
12451 rel->r_addend += sec->output_offset;
12457 name = h->root.root.string;
12460 name = (bfd_elf_string_from_elf_section
12461 (input_bfd, symtab_hdr->sh_link, sym->st_name));
12462 if (name == NULL || *name == '\0')
12463 name = bfd_section_name (input_bfd, sec);
12466 if (r_symndx != STN_UNDEF
12467 && r_type != R_ARM_NONE
12469 || h->root.type == bfd_link_hash_defined
12470 || h->root.type == bfd_link_hash_defweak)
12471 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
12473 (*_bfd_error_handler)
12474 ((sym_type == STT_TLS
12475 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
12476 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
12479 (long) rel->r_offset,
12484 /* We call elf32_arm_final_link_relocate unless we're completely
12485 done, i.e., the relaxation produced the final output we want,
12486 and we won't let anybody mess with it. Also, we have to do
12487 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
12488 both in relaxed and non-relaxed cases. */
12489 if ((elf32_arm_tls_transition (info, r_type, h) != (unsigned)r_type)
12490 || (IS_ARM_TLS_GNU_RELOC (r_type)
12491 && !((h ? elf32_arm_hash_entry (h)->tls_type :
12492 elf32_arm_local_got_tls_type (input_bfd)[r_symndx])
12495 r = elf32_arm_tls_relax (globals, input_bfd, input_section,
12496 contents, rel, h == NULL);
12497 /* This may have been marked unresolved because it came from
12498 a shared library. But we've just dealt with that. */
12499 unresolved_reloc = 0;
12502 r = bfd_reloc_continue;
12504 if (r == bfd_reloc_continue)
12506 unsigned char branch_type =
12507 h ? ARM_GET_SYM_BRANCH_TYPE (h->target_internal)
12508 : ARM_GET_SYM_BRANCH_TYPE (sym->st_target_internal);
12510 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
12511 input_section, contents, rel,
12512 relocation, info, sec, name,
12513 sym_type, branch_type, h,
12518 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12519 because such sections are not SEC_ALLOC and thus ld.so will
12520 not process them. */
12521 if (unresolved_reloc
12522 && !((input_section->flags & SEC_DEBUGGING) != 0
12524 && _bfd_elf_section_offset (output_bfd, info, input_section,
12525 rel->r_offset) != (bfd_vma) -1)
12527 (*_bfd_error_handler)
12528 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12531 (long) rel->r_offset,
12533 h->root.root.string);
12537 if (r != bfd_reloc_ok)
12541 case bfd_reloc_overflow:
12542 /* If the overflowing reloc was to an undefined symbol,
12543 we have already printed one error message and there
12544 is no point complaining again. */
12545 if (!h || h->root.type != bfd_link_hash_undefined)
12546 (*info->callbacks->reloc_overflow)
12547 (info, (h ? &h->root : NULL), name, howto->name,
12548 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
12551 case bfd_reloc_undefined:
12552 (*info->callbacks->undefined_symbol)
12553 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
12556 case bfd_reloc_outofrange:
12557 error_message = _("out of range");
12560 case bfd_reloc_notsupported:
12561 error_message = _("unsupported relocation");
12564 case bfd_reloc_dangerous:
12565 /* error_message should already be set. */
12569 error_message = _("unknown error");
12570 /* Fall through. */
12573 BFD_ASSERT (error_message != NULL);
12574 (*info->callbacks->reloc_dangerous)
12575 (info, error_message, input_bfd, input_section, rel->r_offset);
12584 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
12585 adds the edit to the start of the list. (The list must be built in order of
12586 ascending TINDEX: the function's callers are primarily responsible for
12587 maintaining that condition). */
12590 add_unwind_table_edit (arm_unwind_table_edit **head,
12591 arm_unwind_table_edit **tail,
12592 arm_unwind_edit_type type,
12593 asection *linked_section,
12594 unsigned int tindex)
12596 arm_unwind_table_edit *new_edit = (arm_unwind_table_edit *)
12597 xmalloc (sizeof (arm_unwind_table_edit));
12599 new_edit->type = type;
12600 new_edit->linked_section = linked_section;
12601 new_edit->index = tindex;
12605 new_edit->next = NULL;
12608 (*tail)->next = new_edit;
12610 (*tail) = new_edit;
12613 (*head) = new_edit;
12617 new_edit->next = *head;
12626 static _arm_elf_section_data *get_arm_elf_section_data (asection *);
12628 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
12630 adjust_exidx_size(asection *exidx_sec, int adjust)
12634 if (!exidx_sec->rawsize)
12635 exidx_sec->rawsize = exidx_sec->size;
12637 bfd_set_section_size (exidx_sec->owner, exidx_sec, exidx_sec->size + adjust);
12638 out_sec = exidx_sec->output_section;
12639 /* Adjust size of output section. */
12640 bfd_set_section_size (out_sec->owner, out_sec, out_sec->size +adjust);
12643 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
12645 insert_cantunwind_after(asection *text_sec, asection *exidx_sec)
12647 struct _arm_elf_section_data *exidx_arm_data;
12649 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
12650 add_unwind_table_edit (
12651 &exidx_arm_data->u.exidx.unwind_edit_list,
12652 &exidx_arm_data->u.exidx.unwind_edit_tail,
12653 INSERT_EXIDX_CANTUNWIND_AT_END, text_sec, UINT_MAX);
12655 exidx_arm_data->additional_reloc_count++;
12657 adjust_exidx_size(exidx_sec, 8);
12660 /* Scan .ARM.exidx tables, and create a list describing edits which should be
12661 made to those tables, such that:
12663 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
12664 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
12665 codes which have been inlined into the index).
12667 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
12669 The edits are applied when the tables are written
12670 (in elf32_arm_write_section). */
12673 elf32_arm_fix_exidx_coverage (asection **text_section_order,
12674 unsigned int num_text_sections,
12675 struct bfd_link_info *info,
12676 bfd_boolean merge_exidx_entries)
12679 unsigned int last_second_word = 0, i;
12680 asection *last_exidx_sec = NULL;
12681 asection *last_text_sec = NULL;
12682 int last_unwind_type = -1;
12684 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
12686 for (inp = info->input_bfds; inp != NULL; inp = inp->link.next)
12690 for (sec = inp->sections; sec != NULL; sec = sec->next)
12692 struct bfd_elf_section_data *elf_sec = elf_section_data (sec);
12693 Elf_Internal_Shdr *hdr = &elf_sec->this_hdr;
12695 if (!hdr || hdr->sh_type != SHT_ARM_EXIDX)
12698 if (elf_sec->linked_to)
12700 Elf_Internal_Shdr *linked_hdr
12701 = &elf_section_data (elf_sec->linked_to)->this_hdr;
12702 struct _arm_elf_section_data *linked_sec_arm_data
12703 = get_arm_elf_section_data (linked_hdr->bfd_section);
12705 if (linked_sec_arm_data == NULL)
12708 /* Link this .ARM.exidx section back from the text section it
12710 linked_sec_arm_data->u.text.arm_exidx_sec = sec;
12715 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
12716 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
12717 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
12719 for (i = 0; i < num_text_sections; i++)
12721 asection *sec = text_section_order[i];
12722 asection *exidx_sec;
12723 struct _arm_elf_section_data *arm_data = get_arm_elf_section_data (sec);
12724 struct _arm_elf_section_data *exidx_arm_data;
12725 bfd_byte *contents = NULL;
12726 int deleted_exidx_bytes = 0;
12728 arm_unwind_table_edit *unwind_edit_head = NULL;
12729 arm_unwind_table_edit *unwind_edit_tail = NULL;
12730 Elf_Internal_Shdr *hdr;
12733 if (arm_data == NULL)
12736 exidx_sec = arm_data->u.text.arm_exidx_sec;
12737 if (exidx_sec == NULL)
12739 /* Section has no unwind data. */
12740 if (last_unwind_type == 0 || !last_exidx_sec)
12743 /* Ignore zero sized sections. */
12744 if (sec->size == 0)
12747 insert_cantunwind_after(last_text_sec, last_exidx_sec);
12748 last_unwind_type = 0;
12752 /* Skip /DISCARD/ sections. */
12753 if (bfd_is_abs_section (exidx_sec->output_section))
12756 hdr = &elf_section_data (exidx_sec)->this_hdr;
12757 if (hdr->sh_type != SHT_ARM_EXIDX)
12760 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
12761 if (exidx_arm_data == NULL)
12764 ibfd = exidx_sec->owner;
12766 if (hdr->contents != NULL)
12767 contents = hdr->contents;
12768 else if (! bfd_malloc_and_get_section (ibfd, exidx_sec, &contents))
12772 if (last_unwind_type > 0)
12774 unsigned int first_word = bfd_get_32 (ibfd, contents);
12775 /* Add cantunwind if first unwind item does not match section
12777 if (first_word != sec->vma)
12779 insert_cantunwind_after (last_text_sec, last_exidx_sec);
12780 last_unwind_type = 0;
12784 for (j = 0; j < hdr->sh_size; j += 8)
12786 unsigned int second_word = bfd_get_32 (ibfd, contents + j + 4);
12790 /* An EXIDX_CANTUNWIND entry. */
12791 if (second_word == 1)
12793 if (last_unwind_type == 0)
12797 /* Inlined unwinding data. Merge if equal to previous. */
12798 else if ((second_word & 0x80000000) != 0)
12800 if (merge_exidx_entries
12801 && last_second_word == second_word && last_unwind_type == 1)
12804 last_second_word = second_word;
12806 /* Normal table entry. In theory we could merge these too,
12807 but duplicate entries are likely to be much less common. */
12811 if (elide && !bfd_link_relocatable (info))
12813 add_unwind_table_edit (&unwind_edit_head, &unwind_edit_tail,
12814 DELETE_EXIDX_ENTRY, NULL, j / 8);
12816 deleted_exidx_bytes += 8;
12819 last_unwind_type = unwind_type;
12822 /* Free contents if we allocated it ourselves. */
12823 if (contents != hdr->contents)
12826 /* Record edits to be applied later (in elf32_arm_write_section). */
12827 exidx_arm_data->u.exidx.unwind_edit_list = unwind_edit_head;
12828 exidx_arm_data->u.exidx.unwind_edit_tail = unwind_edit_tail;
12830 if (deleted_exidx_bytes > 0)
12831 adjust_exidx_size(exidx_sec, -deleted_exidx_bytes);
12833 last_exidx_sec = exidx_sec;
12834 last_text_sec = sec;
12837 /* Add terminating CANTUNWIND entry. */
12838 if (!bfd_link_relocatable (info) && last_exidx_sec
12839 && last_unwind_type != 0)
12840 insert_cantunwind_after(last_text_sec, last_exidx_sec);
12846 elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd,
12847 bfd *ibfd, const char *name)
12849 asection *sec, *osec;
12851 sec = bfd_get_linker_section (ibfd, name);
12852 if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0)
12855 osec = sec->output_section;
12856 if (elf32_arm_write_section (obfd, info, sec, sec->contents))
12859 if (! bfd_set_section_contents (obfd, osec, sec->contents,
12860 sec->output_offset, sec->size))
12867 elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info)
12869 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
12870 asection *sec, *osec;
12872 if (globals == NULL)
12875 /* Invoke the regular ELF backend linker to do all the work. */
12876 if (!bfd_elf_final_link (abfd, info))
12879 /* Process stub sections (eg BE8 encoding, ...). */
12880 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
12882 for (i=0; i<htab->top_id; i++)
12884 sec = htab->stub_group[i].stub_sec;
12885 /* Only process it once, in its link_sec slot. */
12886 if (sec && i == htab->stub_group[i].link_sec->id)
12888 osec = sec->output_section;
12889 elf32_arm_write_section (abfd, info, sec, sec->contents);
12890 if (! bfd_set_section_contents (abfd, osec, sec->contents,
12891 sec->output_offset, sec->size))
12896 /* Write out any glue sections now that we have created all the
12898 if (globals->bfd_of_glue_owner != NULL)
12900 if (! elf32_arm_output_glue_section (info, abfd,
12901 globals->bfd_of_glue_owner,
12902 ARM2THUMB_GLUE_SECTION_NAME))
12905 if (! elf32_arm_output_glue_section (info, abfd,
12906 globals->bfd_of_glue_owner,
12907 THUMB2ARM_GLUE_SECTION_NAME))
12910 if (! elf32_arm_output_glue_section (info, abfd,
12911 globals->bfd_of_glue_owner,
12912 VFP11_ERRATUM_VENEER_SECTION_NAME))
12915 if (! elf32_arm_output_glue_section (info, abfd,
12916 globals->bfd_of_glue_owner,
12917 STM32L4XX_ERRATUM_VENEER_SECTION_NAME))
12920 if (! elf32_arm_output_glue_section (info, abfd,
12921 globals->bfd_of_glue_owner,
12922 ARM_BX_GLUE_SECTION_NAME))
12929 /* Return a best guess for the machine number based on the attributes. */
12931 static unsigned int
12932 bfd_arm_get_mach_from_attributes (bfd * abfd)
12934 int arch = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_CPU_arch);
12938 case TAG_CPU_ARCH_V4: return bfd_mach_arm_4;
12939 case TAG_CPU_ARCH_V4T: return bfd_mach_arm_4T;
12940 case TAG_CPU_ARCH_V5T: return bfd_mach_arm_5T;
12942 case TAG_CPU_ARCH_V5TE:
12946 BFD_ASSERT (Tag_CPU_name < NUM_KNOWN_OBJ_ATTRIBUTES);
12947 name = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_CPU_name].s;
12951 if (strcmp (name, "IWMMXT2") == 0)
12952 return bfd_mach_arm_iWMMXt2;
12954 if (strcmp (name, "IWMMXT") == 0)
12955 return bfd_mach_arm_iWMMXt;
12957 if (strcmp (name, "XSCALE") == 0)
12961 BFD_ASSERT (Tag_WMMX_arch < NUM_KNOWN_OBJ_ATTRIBUTES);
12962 wmmx = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_WMMX_arch].i;
12965 case 1: return bfd_mach_arm_iWMMXt;
12966 case 2: return bfd_mach_arm_iWMMXt2;
12967 default: return bfd_mach_arm_XScale;
12972 return bfd_mach_arm_5TE;
12976 return bfd_mach_arm_unknown;
12980 /* Set the right machine number. */
12983 elf32_arm_object_p (bfd *abfd)
12987 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
12989 if (mach == bfd_mach_arm_unknown)
12991 if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
12992 mach = bfd_mach_arm_ep9312;
12994 mach = bfd_arm_get_mach_from_attributes (abfd);
12997 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
13001 /* Function to keep ARM specific flags in the ELF header. */
13004 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
13006 if (elf_flags_init (abfd)
13007 && elf_elfheader (abfd)->e_flags != flags)
13009 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
13011 if (flags & EF_ARM_INTERWORK)
13012 (*_bfd_error_handler)
13013 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
13017 (_("Warning: Clearing the interworking flag of %B due to outside request"),
13023 elf_elfheader (abfd)->e_flags = flags;
13024 elf_flags_init (abfd) = TRUE;
13030 /* Copy backend specific data from one object module to another. */
13033 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
13036 flagword out_flags;
13038 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
13041 in_flags = elf_elfheader (ibfd)->e_flags;
13042 out_flags = elf_elfheader (obfd)->e_flags;
13044 if (elf_flags_init (obfd)
13045 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
13046 && in_flags != out_flags)
13048 /* Cannot mix APCS26 and APCS32 code. */
13049 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
13052 /* Cannot mix float APCS and non-float APCS code. */
13053 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
13056 /* If the src and dest have different interworking flags
13057 then turn off the interworking bit. */
13058 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
13060 if (out_flags & EF_ARM_INTERWORK)
13062 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
13065 in_flags &= ~EF_ARM_INTERWORK;
13068 /* Likewise for PIC, though don't warn for this case. */
13069 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
13070 in_flags &= ~EF_ARM_PIC;
13073 elf_elfheader (obfd)->e_flags = in_flags;
13074 elf_flags_init (obfd) = TRUE;
13076 return _bfd_elf_copy_private_bfd_data (ibfd, obfd);
13079 /* Values for Tag_ABI_PCS_R9_use. */
13088 /* Values for Tag_ABI_PCS_RW_data. */
13091 AEABI_PCS_RW_data_absolute,
13092 AEABI_PCS_RW_data_PCrel,
13093 AEABI_PCS_RW_data_SBrel,
13094 AEABI_PCS_RW_data_unused
13097 /* Values for Tag_ABI_enum_size. */
13103 AEABI_enum_forced_wide
13106 /* Determine whether an object attribute tag takes an integer, a
13110 elf32_arm_obj_attrs_arg_type (int tag)
13112 if (tag == Tag_compatibility)
13113 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
13114 else if (tag == Tag_nodefaults)
13115 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT;
13116 else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name)
13117 return ATTR_TYPE_FLAG_STR_VAL;
13119 return ATTR_TYPE_FLAG_INT_VAL;
13121 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
13124 /* The ABI defines that Tag_conformance should be emitted first, and that
13125 Tag_nodefaults should be second (if either is defined). This sets those
13126 two positions, and bumps up the position of all the remaining tags to
13129 elf32_arm_obj_attrs_order (int num)
13131 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE)
13132 return Tag_conformance;
13133 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE + 1)
13134 return Tag_nodefaults;
13135 if ((num - 2) < Tag_nodefaults)
13137 if ((num - 1) < Tag_conformance)
13142 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
13144 elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag)
13146 if ((tag & 127) < 64)
13149 (_("%B: Unknown mandatory EABI object attribute %d"),
13151 bfd_set_error (bfd_error_bad_value);
13157 (_("Warning: %B: Unknown EABI object attribute %d"),
13163 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
13164 Returns -1 if no architecture could be read. */
13167 get_secondary_compatible_arch (bfd *abfd)
13169 obj_attribute *attr =
13170 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
13172 /* Note: the tag and its argument below are uleb128 values, though
13173 currently-defined values fit in one byte for each. */
13175 && attr->s[0] == Tag_CPU_arch
13176 && (attr->s[1] & 128) != 128
13177 && attr->s[2] == 0)
13180 /* This tag is "safely ignorable", so don't complain if it looks funny. */
13184 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
13185 The tag is removed if ARCH is -1. */
13188 set_secondary_compatible_arch (bfd *abfd, int arch)
13190 obj_attribute *attr =
13191 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
13199 /* Note: the tag and its argument below are uleb128 values, though
13200 currently-defined values fit in one byte for each. */
13202 attr->s = (char *) bfd_alloc (abfd, 3);
13203 attr->s[0] = Tag_CPU_arch;
13208 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
13212 tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out,
13213 int newtag, int secondary_compat)
13215 #define T(X) TAG_CPU_ARCH_##X
13216 int tagl, tagh, result;
13219 T(V6T2), /* PRE_V4. */
13221 T(V6T2), /* V4T. */
13222 T(V6T2), /* V5T. */
13223 T(V6T2), /* V5TE. */
13224 T(V6T2), /* V5TEJ. */
13227 T(V6T2) /* V6T2. */
13231 T(V6K), /* PRE_V4. */
13235 T(V6K), /* V5TE. */
13236 T(V6K), /* V5TEJ. */
13238 T(V6KZ), /* V6KZ. */
13244 T(V7), /* PRE_V4. */
13249 T(V7), /* V5TEJ. */
13262 T(V6K), /* V5TE. */
13263 T(V6K), /* V5TEJ. */
13265 T(V6KZ), /* V6KZ. */
13269 T(V6_M) /* V6_M. */
13271 const int v6s_m[] =
13277 T(V6K), /* V5TE. */
13278 T(V6K), /* V5TEJ. */
13280 T(V6KZ), /* V6KZ. */
13284 T(V6S_M), /* V6_M. */
13285 T(V6S_M) /* V6S_M. */
13287 const int v7e_m[] =
13291 T(V7E_M), /* V4T. */
13292 T(V7E_M), /* V5T. */
13293 T(V7E_M), /* V5TE. */
13294 T(V7E_M), /* V5TEJ. */
13295 T(V7E_M), /* V6. */
13296 T(V7E_M), /* V6KZ. */
13297 T(V7E_M), /* V6T2. */
13298 T(V7E_M), /* V6K. */
13299 T(V7E_M), /* V7. */
13300 T(V7E_M), /* V6_M. */
13301 T(V7E_M), /* V6S_M. */
13302 T(V7E_M) /* V7E_M. */
13306 T(V8), /* PRE_V4. */
13311 T(V8), /* V5TEJ. */
13318 T(V8), /* V6S_M. */
13319 T(V8), /* V7E_M. */
13322 const int v8m_baseline[] =
13335 T(V8M_BASE), /* V6_M. */
13336 T(V8M_BASE), /* V6S_M. */
13340 T(V8M_BASE) /* V8-M BASELINE. */
13342 const int v8m_mainline[] =
13354 T(V8M_MAIN), /* V7. */
13355 T(V8M_MAIN), /* V6_M. */
13356 T(V8M_MAIN), /* V6S_M. */
13357 T(V8M_MAIN), /* V7E_M. */
13360 T(V8M_MAIN), /* V8-M BASELINE. */
13361 T(V8M_MAIN) /* V8-M MAINLINE. */
13363 const int v4t_plus_v6_m[] =
13369 T(V5TE), /* V5TE. */
13370 T(V5TEJ), /* V5TEJ. */
13372 T(V6KZ), /* V6KZ. */
13373 T(V6T2), /* V6T2. */
13376 T(V6_M), /* V6_M. */
13377 T(V6S_M), /* V6S_M. */
13378 T(V7E_M), /* V7E_M. */
13381 T(V8M_BASE), /* V8-M BASELINE. */
13382 T(V8M_MAIN), /* V8-M MAINLINE. */
13383 T(V4T_PLUS_V6_M) /* V4T plus V6_M. */
13385 const int *comb[] =
13397 /* Pseudo-architecture. */
13401 /* Check we've not got a higher architecture than we know about. */
13403 if (oldtag > MAX_TAG_CPU_ARCH || newtag > MAX_TAG_CPU_ARCH)
13405 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd);
13409 /* Override old tag if we have a Tag_also_compatible_with on the output. */
13411 if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T))
13412 || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M)))
13413 oldtag = T(V4T_PLUS_V6_M);
13415 /* And override the new tag if we have a Tag_also_compatible_with on the
13418 if ((newtag == T(V6_M) && secondary_compat == T(V4T))
13419 || (newtag == T(V4T) && secondary_compat == T(V6_M)))
13420 newtag = T(V4T_PLUS_V6_M);
13422 tagl = (oldtag < newtag) ? oldtag : newtag;
13423 result = tagh = (oldtag > newtag) ? oldtag : newtag;
13425 /* Architectures before V6KZ add features monotonically. */
13426 if (tagh <= TAG_CPU_ARCH_V6KZ)
13429 result = comb[tagh - T(V6T2)] ? comb[tagh - T(V6T2)][tagl] : -1;
13431 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
13432 as the canonical version. */
13433 if (result == T(V4T_PLUS_V6_M))
13436 *secondary_compat_out = T(V6_M);
13439 *secondary_compat_out = -1;
13443 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
13444 ibfd, oldtag, newtag);
13452 /* Query attributes object to see if integer divide instructions may be
13453 present in an object. */
13455 elf32_arm_attributes_accept_div (const obj_attribute *attr)
13457 int arch = attr[Tag_CPU_arch].i;
13458 int profile = attr[Tag_CPU_arch_profile].i;
13460 switch (attr[Tag_DIV_use].i)
13463 /* Integer divide allowed if instruction contained in archetecture. */
13464 if (arch == TAG_CPU_ARCH_V7 && (profile == 'R' || profile == 'M'))
13466 else if (arch >= TAG_CPU_ARCH_V7E_M)
13472 /* Integer divide explicitly prohibited. */
13476 /* Unrecognised case - treat as allowing divide everywhere. */
13478 /* Integer divide allowed in ARM state. */
13483 /* Query attributes object to see if integer divide instructions are
13484 forbidden to be in the object. This is not the inverse of
13485 elf32_arm_attributes_accept_div. */
13487 elf32_arm_attributes_forbid_div (const obj_attribute *attr)
13489 return attr[Tag_DIV_use].i == 1;
13492 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
13493 are conflicting attributes. */
13496 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
13498 obj_attribute *in_attr;
13499 obj_attribute *out_attr;
13500 /* Some tags have 0 = don't care, 1 = strong requirement,
13501 2 = weak requirement. */
13502 static const int order_021[3] = {0, 2, 1};
13504 bfd_boolean result = TRUE;
13505 const char *sec_name = get_elf_backend_data (ibfd)->obj_attrs_section;
13507 /* Skip the linker stubs file. This preserves previous behavior
13508 of accepting unknown attributes in the first input file - but
13510 if (ibfd->flags & BFD_LINKER_CREATED)
13513 /* Skip any input that hasn't attribute section.
13514 This enables to link object files without attribute section with
13516 if (bfd_get_section_by_name (ibfd, sec_name) == NULL)
13519 if (!elf_known_obj_attributes_proc (obfd)[0].i)
13521 /* This is the first object. Copy the attributes. */
13522 _bfd_elf_copy_obj_attributes (ibfd, obfd);
13524 out_attr = elf_known_obj_attributes_proc (obfd);
13526 /* Use the Tag_null value to indicate the attributes have been
13530 /* We do not output objects with Tag_MPextension_use_legacy - we move
13531 the attribute's value to Tag_MPextension_use. */
13532 if (out_attr[Tag_MPextension_use_legacy].i != 0)
13534 if (out_attr[Tag_MPextension_use].i != 0
13535 && out_attr[Tag_MPextension_use_legacy].i
13536 != out_attr[Tag_MPextension_use].i)
13539 (_("Error: %B has both the current and legacy "
13540 "Tag_MPextension_use attributes"), ibfd);
13544 out_attr[Tag_MPextension_use] =
13545 out_attr[Tag_MPextension_use_legacy];
13546 out_attr[Tag_MPextension_use_legacy].type = 0;
13547 out_attr[Tag_MPextension_use_legacy].i = 0;
13553 in_attr = elf_known_obj_attributes_proc (ibfd);
13554 out_attr = elf_known_obj_attributes_proc (obfd);
13555 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
13556 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
13558 /* Ignore mismatches if the object doesn't use floating point or is
13559 floating point ABI independent. */
13560 if (out_attr[Tag_ABI_FP_number_model].i == AEABI_FP_number_model_none
13561 || (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
13562 && out_attr[Tag_ABI_VFP_args].i == AEABI_VFP_args_compatible))
13563 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
13564 else if (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
13565 && in_attr[Tag_ABI_VFP_args].i != AEABI_VFP_args_compatible)
13568 (_("error: %B uses VFP register arguments, %B does not"),
13569 in_attr[Tag_ABI_VFP_args].i ? ibfd : obfd,
13570 in_attr[Tag_ABI_VFP_args].i ? obfd : ibfd);
13575 for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
13577 /* Merge this attribute with existing attributes. */
13580 case Tag_CPU_raw_name:
13582 /* These are merged after Tag_CPU_arch. */
13585 case Tag_ABI_optimization_goals:
13586 case Tag_ABI_FP_optimization_goals:
13587 /* Use the first value seen. */
13592 int secondary_compat = -1, secondary_compat_out = -1;
13593 unsigned int saved_out_attr = out_attr[i].i;
13595 static const char *name_table[] =
13597 /* These aren't real CPU names, but we can't guess
13598 that from the architecture version alone. */
13614 "ARM v8-M.baseline",
13615 "ARM v8-M.mainline",
13618 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
13619 secondary_compat = get_secondary_compatible_arch (ibfd);
13620 secondary_compat_out = get_secondary_compatible_arch (obfd);
13621 arch_attr = tag_cpu_arch_combine (ibfd, out_attr[i].i,
13622 &secondary_compat_out,
13626 /* Return with error if failed to merge. */
13627 if (arch_attr == -1)
13630 out_attr[i].i = arch_attr;
13632 set_secondary_compatible_arch (obfd, secondary_compat_out);
13634 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
13635 if (out_attr[i].i == saved_out_attr)
13636 ; /* Leave the names alone. */
13637 else if (out_attr[i].i == in_attr[i].i)
13639 /* The output architecture has been changed to match the
13640 input architecture. Use the input names. */
13641 out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s
13642 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s)
13644 out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s
13645 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s)
13650 out_attr[Tag_CPU_name].s = NULL;
13651 out_attr[Tag_CPU_raw_name].s = NULL;
13654 /* If we still don't have a value for Tag_CPU_name,
13655 make one up now. Tag_CPU_raw_name remains blank. */
13656 if (out_attr[Tag_CPU_name].s == NULL
13657 && out_attr[i].i < ARRAY_SIZE (name_table))
13658 out_attr[Tag_CPU_name].s =
13659 _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]);
13663 case Tag_ARM_ISA_use:
13664 case Tag_THUMB_ISA_use:
13665 case Tag_WMMX_arch:
13666 case Tag_Advanced_SIMD_arch:
13667 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
13668 case Tag_ABI_FP_rounding:
13669 case Tag_ABI_FP_exceptions:
13670 case Tag_ABI_FP_user_exceptions:
13671 case Tag_ABI_FP_number_model:
13672 case Tag_FP_HP_extension:
13673 case Tag_CPU_unaligned_access:
13675 case Tag_MPextension_use:
13676 /* Use the largest value specified. */
13677 if (in_attr[i].i > out_attr[i].i)
13678 out_attr[i].i = in_attr[i].i;
13681 case Tag_ABI_align_preserved:
13682 case Tag_ABI_PCS_RO_data:
13683 /* Use the smallest value specified. */
13684 if (in_attr[i].i < out_attr[i].i)
13685 out_attr[i].i = in_attr[i].i;
13688 case Tag_ABI_align_needed:
13689 if ((in_attr[i].i > 0 || out_attr[i].i > 0)
13690 && (in_attr[Tag_ABI_align_preserved].i == 0
13691 || out_attr[Tag_ABI_align_preserved].i == 0))
13693 /* This error message should be enabled once all non-conformant
13694 binaries in the toolchain have had the attributes set
13697 (_("error: %B: 8-byte data alignment conflicts with %B"),
13701 /* Fall through. */
13702 case Tag_ABI_FP_denormal:
13703 case Tag_ABI_PCS_GOT_use:
13704 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
13705 value if greater than 2 (for future-proofing). */
13706 if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i)
13707 || (in_attr[i].i <= 2 && out_attr[i].i <= 2
13708 && order_021[in_attr[i].i] > order_021[out_attr[i].i]))
13709 out_attr[i].i = in_attr[i].i;
13712 case Tag_Virtualization_use:
13713 /* The virtualization tag effectively stores two bits of
13714 information: the intended use of TrustZone (in bit 0), and the
13715 intended use of Virtualization (in bit 1). */
13716 if (out_attr[i].i == 0)
13717 out_attr[i].i = in_attr[i].i;
13718 else if (in_attr[i].i != 0
13719 && in_attr[i].i != out_attr[i].i)
13721 if (in_attr[i].i <= 3 && out_attr[i].i <= 3)
13726 (_("error: %B: unable to merge virtualization attributes "
13734 case Tag_CPU_arch_profile:
13735 if (out_attr[i].i != in_attr[i].i)
13737 /* 0 will merge with anything.
13738 'A' and 'S' merge to 'A'.
13739 'R' and 'S' merge to 'R'.
13740 'M' and 'A|R|S' is an error. */
13741 if (out_attr[i].i == 0
13742 || (out_attr[i].i == 'S'
13743 && (in_attr[i].i == 'A' || in_attr[i].i == 'R')))
13744 out_attr[i].i = in_attr[i].i;
13745 else if (in_attr[i].i == 0
13746 || (in_attr[i].i == 'S'
13747 && (out_attr[i].i == 'A' || out_attr[i].i == 'R')))
13748 ; /* Do nothing. */
13752 (_("error: %B: Conflicting architecture profiles %c/%c"),
13754 in_attr[i].i ? in_attr[i].i : '0',
13755 out_attr[i].i ? out_attr[i].i : '0');
13761 case Tag_DSP_extension:
13762 /* No need to change output value if any of:
13763 - pre (<=) ARMv5T input architecture (do not have DSP)
13764 - M input profile not ARMv7E-M and do not have DSP. */
13765 if (in_attr[Tag_CPU_arch].i <= 3
13766 || (in_attr[Tag_CPU_arch_profile].i == 'M'
13767 && in_attr[Tag_CPU_arch].i != 13
13768 && in_attr[i].i == 0))
13769 ; /* Do nothing. */
13770 /* Output value should be 0 if DSP part of architecture, ie.
13771 - post (>=) ARMv5te architecture output
13772 - A, R or S profile output or ARMv7E-M output architecture. */
13773 else if (out_attr[Tag_CPU_arch].i >= 4
13774 && (out_attr[Tag_CPU_arch_profile].i == 'A'
13775 || out_attr[Tag_CPU_arch_profile].i == 'R'
13776 || out_attr[Tag_CPU_arch_profile].i == 'S'
13777 || out_attr[Tag_CPU_arch].i == 13))
13779 /* Otherwise, DSP instructions are added and not part of output
13787 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
13788 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
13789 when it's 0. It might mean absence of FP hardware if
13790 Tag_FP_arch is zero. */
13792 #define VFP_VERSION_COUNT 9
13793 static const struct
13797 } vfp_versions[VFP_VERSION_COUNT] =
13813 /* If the output has no requirement about FP hardware,
13814 follow the requirement of the input. */
13815 if (out_attr[i].i == 0)
13817 BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0);
13818 out_attr[i].i = in_attr[i].i;
13819 out_attr[Tag_ABI_HardFP_use].i
13820 = in_attr[Tag_ABI_HardFP_use].i;
13823 /* If the input has no requirement about FP hardware, do
13825 else if (in_attr[i].i == 0)
13827 BFD_ASSERT (in_attr[Tag_ABI_HardFP_use].i == 0);
13831 /* Both the input and the output have nonzero Tag_FP_arch.
13832 So Tag_ABI_HardFP_use is implied by Tag_FP_arch when it's zero. */
13834 /* If both the input and the output have zero Tag_ABI_HardFP_use,
13836 if (in_attr[Tag_ABI_HardFP_use].i == 0
13837 && out_attr[Tag_ABI_HardFP_use].i == 0)
13839 /* If the input and the output have different Tag_ABI_HardFP_use,
13840 the combination of them is 0 (implied by Tag_FP_arch). */
13841 else if (in_attr[Tag_ABI_HardFP_use].i
13842 != out_attr[Tag_ABI_HardFP_use].i)
13843 out_attr[Tag_ABI_HardFP_use].i = 0;
13845 /* Now we can handle Tag_FP_arch. */
13847 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
13848 pick the biggest. */
13849 if (in_attr[i].i >= VFP_VERSION_COUNT
13850 && in_attr[i].i > out_attr[i].i)
13852 out_attr[i] = in_attr[i];
13855 /* The output uses the superset of input features
13856 (ISA version) and registers. */
13857 ver = vfp_versions[in_attr[i].i].ver;
13858 if (ver < vfp_versions[out_attr[i].i].ver)
13859 ver = vfp_versions[out_attr[i].i].ver;
13860 regs = vfp_versions[in_attr[i].i].regs;
13861 if (regs < vfp_versions[out_attr[i].i].regs)
13862 regs = vfp_versions[out_attr[i].i].regs;
13863 /* This assumes all possible supersets are also a valid
13865 for (newval = VFP_VERSION_COUNT - 1; newval > 0; newval--)
13867 if (regs == vfp_versions[newval].regs
13868 && ver == vfp_versions[newval].ver)
13871 out_attr[i].i = newval;
13874 case Tag_PCS_config:
13875 if (out_attr[i].i == 0)
13876 out_attr[i].i = in_attr[i].i;
13877 else if (in_attr[i].i != 0 && out_attr[i].i != in_attr[i].i)
13879 /* It's sometimes ok to mix different configs, so this is only
13882 (_("Warning: %B: Conflicting platform configuration"), ibfd);
13885 case Tag_ABI_PCS_R9_use:
13886 if (in_attr[i].i != out_attr[i].i
13887 && out_attr[i].i != AEABI_R9_unused
13888 && in_attr[i].i != AEABI_R9_unused)
13891 (_("error: %B: Conflicting use of R9"), ibfd);
13894 if (out_attr[i].i == AEABI_R9_unused)
13895 out_attr[i].i = in_attr[i].i;
13897 case Tag_ABI_PCS_RW_data:
13898 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
13899 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
13900 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
13903 (_("error: %B: SB relative addressing conflicts with use of R9"),
13907 /* Use the smallest value specified. */
13908 if (in_attr[i].i < out_attr[i].i)
13909 out_attr[i].i = in_attr[i].i;
13911 case Tag_ABI_PCS_wchar_t:
13912 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
13913 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
13916 (_("warning: %B uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"),
13917 ibfd, in_attr[i].i, out_attr[i].i);
13919 else if (in_attr[i].i && !out_attr[i].i)
13920 out_attr[i].i = in_attr[i].i;
13922 case Tag_ABI_enum_size:
13923 if (in_attr[i].i != AEABI_enum_unused)
13925 if (out_attr[i].i == AEABI_enum_unused
13926 || out_attr[i].i == AEABI_enum_forced_wide)
13928 /* The existing object is compatible with anything.
13929 Use whatever requirements the new object has. */
13930 out_attr[i].i = in_attr[i].i;
13932 else if (in_attr[i].i != AEABI_enum_forced_wide
13933 && out_attr[i].i != in_attr[i].i
13934 && !elf_arm_tdata (obfd)->no_enum_size_warning)
13936 static const char *aeabi_enum_names[] =
13937 { "", "variable-size", "32-bit", "" };
13938 const char *in_name =
13939 in_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
13940 ? aeabi_enum_names[in_attr[i].i]
13942 const char *out_name =
13943 out_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
13944 ? aeabi_enum_names[out_attr[i].i]
13947 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
13948 ibfd, in_name, out_name);
13952 case Tag_ABI_VFP_args:
13955 case Tag_ABI_WMMX_args:
13956 if (in_attr[i].i != out_attr[i].i)
13959 (_("error: %B uses iWMMXt register arguments, %B does not"),
13964 case Tag_compatibility:
13965 /* Merged in target-independent code. */
13967 case Tag_ABI_HardFP_use:
13968 /* This is handled along with Tag_FP_arch. */
13970 case Tag_ABI_FP_16bit_format:
13971 if (in_attr[i].i != 0 && out_attr[i].i != 0)
13973 if (in_attr[i].i != out_attr[i].i)
13976 (_("error: fp16 format mismatch between %B and %B"),
13981 if (in_attr[i].i != 0)
13982 out_attr[i].i = in_attr[i].i;
13986 /* A value of zero on input means that the divide instruction may
13987 be used if available in the base architecture as specified via
13988 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
13989 the user did not want divide instructions. A value of 2
13990 explicitly means that divide instructions were allowed in ARM
13991 and Thumb state. */
13992 if (in_attr[i].i == out_attr[i].i)
13993 /* Do nothing. */ ;
13994 else if (elf32_arm_attributes_forbid_div (in_attr)
13995 && !elf32_arm_attributes_accept_div (out_attr))
13997 else if (elf32_arm_attributes_forbid_div (out_attr)
13998 && elf32_arm_attributes_accept_div (in_attr))
13999 out_attr[i].i = in_attr[i].i;
14000 else if (in_attr[i].i == 2)
14001 out_attr[i].i = in_attr[i].i;
14004 case Tag_MPextension_use_legacy:
14005 /* We don't output objects with Tag_MPextension_use_legacy - we
14006 move the value to Tag_MPextension_use. */
14007 if (in_attr[i].i != 0 && in_attr[Tag_MPextension_use].i != 0)
14009 if (in_attr[Tag_MPextension_use].i != in_attr[i].i)
14012 (_("%B has has both the current and legacy "
14013 "Tag_MPextension_use attributes"),
14019 if (in_attr[i].i > out_attr[Tag_MPextension_use].i)
14020 out_attr[Tag_MPextension_use] = in_attr[i];
14024 case Tag_nodefaults:
14025 /* This tag is set if it exists, but the value is unused (and is
14026 typically zero). We don't actually need to do anything here -
14027 the merge happens automatically when the type flags are merged
14030 case Tag_also_compatible_with:
14031 /* Already done in Tag_CPU_arch. */
14033 case Tag_conformance:
14034 /* Keep the attribute if it matches. Throw it away otherwise.
14035 No attribute means no claim to conform. */
14036 if (!in_attr[i].s || !out_attr[i].s
14037 || strcmp (in_attr[i].s, out_attr[i].s) != 0)
14038 out_attr[i].s = NULL;
14043 = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
14046 /* If out_attr was copied from in_attr then it won't have a type yet. */
14047 if (in_attr[i].type && !out_attr[i].type)
14048 out_attr[i].type = in_attr[i].type;
14051 /* Merge Tag_compatibility attributes and any common GNU ones. */
14052 if (!_bfd_elf_merge_object_attributes (ibfd, obfd))
14055 /* Check for any attributes not known on ARM. */
14056 result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
14062 /* Return TRUE if the two EABI versions are incompatible. */
14065 elf32_arm_versions_compatible (unsigned iver, unsigned over)
14067 /* v4 and v5 are the same spec before and after it was released,
14068 so allow mixing them. */
14069 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
14070 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
14073 return (iver == over);
14076 /* Merge backend specific data from an object file to the output
14077 object file when linking. */
14080 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd);
14082 /* Display the flags field. */
14085 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
14087 FILE * file = (FILE *) ptr;
14088 unsigned long flags;
14090 BFD_ASSERT (abfd != NULL && ptr != NULL);
14092 /* Print normal ELF private data. */
14093 _bfd_elf_print_private_bfd_data (abfd, ptr);
14095 flags = elf_elfheader (abfd)->e_flags;
14096 /* Ignore init flag - it may not be set, despite the flags field
14097 containing valid data. */
14099 /* xgettext:c-format */
14100 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
14102 switch (EF_ARM_EABI_VERSION (flags))
14104 case EF_ARM_EABI_UNKNOWN:
14105 /* The following flag bits are GNU extensions and not part of the
14106 official ARM ELF extended ABI. Hence they are only decoded if
14107 the EABI version is not set. */
14108 if (flags & EF_ARM_INTERWORK)
14109 fprintf (file, _(" [interworking enabled]"));
14111 if (flags & EF_ARM_APCS_26)
14112 fprintf (file, " [APCS-26]");
14114 fprintf (file, " [APCS-32]");
14116 if (flags & EF_ARM_VFP_FLOAT)
14117 fprintf (file, _(" [VFP float format]"));
14118 else if (flags & EF_ARM_MAVERICK_FLOAT)
14119 fprintf (file, _(" [Maverick float format]"));
14121 fprintf (file, _(" [FPA float format]"));
14123 if (flags & EF_ARM_APCS_FLOAT)
14124 fprintf (file, _(" [floats passed in float registers]"));
14126 if (flags & EF_ARM_PIC)
14127 fprintf (file, _(" [position independent]"));
14129 if (flags & EF_ARM_NEW_ABI)
14130 fprintf (file, _(" [new ABI]"));
14132 if (flags & EF_ARM_OLD_ABI)
14133 fprintf (file, _(" [old ABI]"));
14135 if (flags & EF_ARM_SOFT_FLOAT)
14136 fprintf (file, _(" [software FP]"));
14138 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
14139 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
14140 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
14141 | EF_ARM_MAVERICK_FLOAT);
14144 case EF_ARM_EABI_VER1:
14145 fprintf (file, _(" [Version1 EABI]"));
14147 if (flags & EF_ARM_SYMSARESORTED)
14148 fprintf (file, _(" [sorted symbol table]"));
14150 fprintf (file, _(" [unsorted symbol table]"));
14152 flags &= ~ EF_ARM_SYMSARESORTED;
14155 case EF_ARM_EABI_VER2:
14156 fprintf (file, _(" [Version2 EABI]"));
14158 if (flags & EF_ARM_SYMSARESORTED)
14159 fprintf (file, _(" [sorted symbol table]"));
14161 fprintf (file, _(" [unsorted symbol table]"));
14163 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
14164 fprintf (file, _(" [dynamic symbols use segment index]"));
14166 if (flags & EF_ARM_MAPSYMSFIRST)
14167 fprintf (file, _(" [mapping symbols precede others]"));
14169 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
14170 | EF_ARM_MAPSYMSFIRST);
14173 case EF_ARM_EABI_VER3:
14174 fprintf (file, _(" [Version3 EABI]"));
14177 case EF_ARM_EABI_VER4:
14178 fprintf (file, _(" [Version4 EABI]"));
14181 case EF_ARM_EABI_VER5:
14182 fprintf (file, _(" [Version5 EABI]"));
14184 if (flags & EF_ARM_ABI_FLOAT_SOFT)
14185 fprintf (file, _(" [soft-float ABI]"));
14187 if (flags & EF_ARM_ABI_FLOAT_HARD)
14188 fprintf (file, _(" [hard-float ABI]"));
14190 flags &= ~(EF_ARM_ABI_FLOAT_SOFT | EF_ARM_ABI_FLOAT_HARD);
14193 if (flags & EF_ARM_BE8)
14194 fprintf (file, _(" [BE8]"));
14196 if (flags & EF_ARM_LE8)
14197 fprintf (file, _(" [LE8]"));
14199 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
14203 fprintf (file, _(" <EABI version unrecognised>"));
14207 flags &= ~ EF_ARM_EABIMASK;
14209 if (flags & EF_ARM_RELEXEC)
14210 fprintf (file, _(" [relocatable executable]"));
14212 flags &= ~EF_ARM_RELEXEC;
14215 fprintf (file, _("<Unrecognised flag bits set>"));
14217 fputc ('\n', file);
14223 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
14225 switch (ELF_ST_TYPE (elf_sym->st_info))
14227 case STT_ARM_TFUNC:
14228 return ELF_ST_TYPE (elf_sym->st_info);
14230 case STT_ARM_16BIT:
14231 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
14232 This allows us to distinguish between data used by Thumb instructions
14233 and non-data (which is probably code) inside Thumb regions of an
14235 if (type != STT_OBJECT && type != STT_TLS)
14236 return ELF_ST_TYPE (elf_sym->st_info);
14247 elf32_arm_gc_mark_hook (asection *sec,
14248 struct bfd_link_info *info,
14249 Elf_Internal_Rela *rel,
14250 struct elf_link_hash_entry *h,
14251 Elf_Internal_Sym *sym)
14254 switch (ELF32_R_TYPE (rel->r_info))
14256 case R_ARM_GNU_VTINHERIT:
14257 case R_ARM_GNU_VTENTRY:
14261 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
14264 /* Update the got entry reference counts for the section being removed. */
14267 elf32_arm_gc_sweep_hook (bfd * abfd,
14268 struct bfd_link_info * info,
14270 const Elf_Internal_Rela * relocs)
14272 Elf_Internal_Shdr *symtab_hdr;
14273 struct elf_link_hash_entry **sym_hashes;
14274 bfd_signed_vma *local_got_refcounts;
14275 const Elf_Internal_Rela *rel, *relend;
14276 struct elf32_arm_link_hash_table * globals;
14278 if (bfd_link_relocatable (info))
14281 globals = elf32_arm_hash_table (info);
14282 if (globals == NULL)
14285 elf_section_data (sec)->local_dynrel = NULL;
14287 symtab_hdr = & elf_symtab_hdr (abfd);
14288 sym_hashes = elf_sym_hashes (abfd);
14289 local_got_refcounts = elf_local_got_refcounts (abfd);
14291 check_use_blx (globals);
14293 relend = relocs + sec->reloc_count;
14294 for (rel = relocs; rel < relend; rel++)
14296 unsigned long r_symndx;
14297 struct elf_link_hash_entry *h = NULL;
14298 struct elf32_arm_link_hash_entry *eh;
14300 bfd_boolean call_reloc_p;
14301 bfd_boolean may_become_dynamic_p;
14302 bfd_boolean may_need_local_target_p;
14303 union gotplt_union *root_plt;
14304 struct arm_plt_info *arm_plt;
14306 r_symndx = ELF32_R_SYM (rel->r_info);
14307 if (r_symndx >= symtab_hdr->sh_info)
14309 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
14310 while (h->root.type == bfd_link_hash_indirect
14311 || h->root.type == bfd_link_hash_warning)
14312 h = (struct elf_link_hash_entry *) h->root.u.i.link;
14314 eh = (struct elf32_arm_link_hash_entry *) h;
14316 call_reloc_p = FALSE;
14317 may_become_dynamic_p = FALSE;
14318 may_need_local_target_p = FALSE;
14320 r_type = ELF32_R_TYPE (rel->r_info);
14321 r_type = arm_real_reloc_type (globals, r_type);
14325 case R_ARM_GOT_PREL:
14326 case R_ARM_TLS_GD32:
14327 case R_ARM_TLS_IE32:
14330 if (h->got.refcount > 0)
14331 h->got.refcount -= 1;
14333 else if (local_got_refcounts != NULL)
14335 if (local_got_refcounts[r_symndx] > 0)
14336 local_got_refcounts[r_symndx] -= 1;
14340 case R_ARM_TLS_LDM32:
14341 globals->tls_ldm_got.refcount -= 1;
14349 case R_ARM_THM_CALL:
14350 case R_ARM_THM_JUMP24:
14351 case R_ARM_THM_JUMP19:
14352 call_reloc_p = TRUE;
14353 may_need_local_target_p = TRUE;
14357 if (!globals->vxworks_p)
14359 may_need_local_target_p = TRUE;
14362 /* Fall through. */
14364 case R_ARM_ABS32_NOI:
14366 case R_ARM_REL32_NOI:
14367 case R_ARM_MOVW_ABS_NC:
14368 case R_ARM_MOVT_ABS:
14369 case R_ARM_MOVW_PREL_NC:
14370 case R_ARM_MOVT_PREL:
14371 case R_ARM_THM_MOVW_ABS_NC:
14372 case R_ARM_THM_MOVT_ABS:
14373 case R_ARM_THM_MOVW_PREL_NC:
14374 case R_ARM_THM_MOVT_PREL:
14375 /* Should the interworking branches be here also? */
14376 if ((bfd_link_pic (info) || globals->root.is_relocatable_executable)
14377 && (sec->flags & SEC_ALLOC) != 0)
14380 && elf32_arm_howto_from_type (r_type)->pc_relative)
14382 call_reloc_p = TRUE;
14383 may_need_local_target_p = TRUE;
14386 may_become_dynamic_p = TRUE;
14389 may_need_local_target_p = TRUE;
14396 if (may_need_local_target_p
14397 && elf32_arm_get_plt_info (abfd, globals, eh, r_symndx, &root_plt,
14400 /* If PLT refcount book-keeping is wrong and too low, we'll
14401 see a zero value (going to -1) for the root PLT reference
14403 if (root_plt->refcount >= 0)
14405 BFD_ASSERT (root_plt->refcount != 0);
14406 root_plt->refcount -= 1;
14409 /* A value of -1 means the symbol has become local, forced
14410 or seeing a hidden definition. Any other negative value
14412 BFD_ASSERT (root_plt->refcount == -1);
14415 arm_plt->noncall_refcount--;
14417 if (r_type == R_ARM_THM_CALL)
14418 arm_plt->maybe_thumb_refcount--;
14420 if (r_type == R_ARM_THM_JUMP24
14421 || r_type == R_ARM_THM_JUMP19)
14422 arm_plt->thumb_refcount--;
14425 if (may_become_dynamic_p)
14427 struct elf_dyn_relocs **pp;
14428 struct elf_dyn_relocs *p;
14431 pp = &(eh->dyn_relocs);
14434 Elf_Internal_Sym *isym;
14436 isym = bfd_sym_from_r_symndx (&globals->sym_cache,
14440 pp = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
14444 for (; (p = *pp) != NULL; pp = &p->next)
14447 /* Everything must go for SEC. */
14457 /* Look through the relocs for a section during the first phase. */
14460 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
14461 asection *sec, const Elf_Internal_Rela *relocs)
14463 Elf_Internal_Shdr *symtab_hdr;
14464 struct elf_link_hash_entry **sym_hashes;
14465 const Elf_Internal_Rela *rel;
14466 const Elf_Internal_Rela *rel_end;
14469 struct elf32_arm_link_hash_table *htab;
14470 bfd_boolean call_reloc_p;
14471 bfd_boolean may_become_dynamic_p;
14472 bfd_boolean may_need_local_target_p;
14473 unsigned long nsyms;
14475 if (bfd_link_relocatable (info))
14478 BFD_ASSERT (is_arm_elf (abfd));
14480 htab = elf32_arm_hash_table (info);
14486 /* Create dynamic sections for relocatable executables so that we can
14487 copy relocations. */
14488 if (htab->root.is_relocatable_executable
14489 && ! htab->root.dynamic_sections_created)
14491 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
14495 if (htab->root.dynobj == NULL)
14496 htab->root.dynobj = abfd;
14497 if (!create_ifunc_sections (info))
14500 dynobj = htab->root.dynobj;
14502 symtab_hdr = & elf_symtab_hdr (abfd);
14503 sym_hashes = elf_sym_hashes (abfd);
14504 nsyms = NUM_SHDR_ENTRIES (symtab_hdr);
14506 rel_end = relocs + sec->reloc_count;
14507 for (rel = relocs; rel < rel_end; rel++)
14509 Elf_Internal_Sym *isym;
14510 struct elf_link_hash_entry *h;
14511 struct elf32_arm_link_hash_entry *eh;
14512 unsigned long r_symndx;
14515 r_symndx = ELF32_R_SYM (rel->r_info);
14516 r_type = ELF32_R_TYPE (rel->r_info);
14517 r_type = arm_real_reloc_type (htab, r_type);
14519 if (r_symndx >= nsyms
14520 /* PR 9934: It is possible to have relocations that do not
14521 refer to symbols, thus it is also possible to have an
14522 object file containing relocations but no symbol table. */
14523 && (r_symndx > STN_UNDEF || nsyms > 0))
14525 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
14534 if (r_symndx < symtab_hdr->sh_info)
14536 /* A local symbol. */
14537 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
14544 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
14545 while (h->root.type == bfd_link_hash_indirect
14546 || h->root.type == bfd_link_hash_warning)
14547 h = (struct elf_link_hash_entry *) h->root.u.i.link;
14549 /* PR15323, ref flags aren't set for references in the
14551 h->root.non_ir_ref = 1;
14555 eh = (struct elf32_arm_link_hash_entry *) h;
14557 call_reloc_p = FALSE;
14558 may_become_dynamic_p = FALSE;
14559 may_need_local_target_p = FALSE;
14561 /* Could be done earlier, if h were already available. */
14562 r_type = elf32_arm_tls_transition (info, r_type, h);
14566 case R_ARM_GOT_PREL:
14567 case R_ARM_TLS_GD32:
14568 case R_ARM_TLS_IE32:
14569 case R_ARM_TLS_GOTDESC:
14570 case R_ARM_TLS_DESCSEQ:
14571 case R_ARM_THM_TLS_DESCSEQ:
14572 case R_ARM_TLS_CALL:
14573 case R_ARM_THM_TLS_CALL:
14574 /* This symbol requires a global offset table entry. */
14576 int tls_type, old_tls_type;
14580 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
14582 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
14584 case R_ARM_TLS_GOTDESC:
14585 case R_ARM_TLS_CALL: case R_ARM_THM_TLS_CALL:
14586 case R_ARM_TLS_DESCSEQ: case R_ARM_THM_TLS_DESCSEQ:
14587 tls_type = GOT_TLS_GDESC; break;
14589 default: tls_type = GOT_NORMAL; break;
14592 if (!bfd_link_executable (info) && (tls_type & GOT_TLS_IE))
14593 info->flags |= DF_STATIC_TLS;
14598 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
14602 /* This is a global offset table entry for a local symbol. */
14603 if (!elf32_arm_allocate_local_sym_info (abfd))
14605 elf_local_got_refcounts (abfd)[r_symndx] += 1;
14606 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
14609 /* If a variable is accessed with both tls methods, two
14610 slots may be created. */
14611 if (GOT_TLS_GD_ANY_P (old_tls_type)
14612 && GOT_TLS_GD_ANY_P (tls_type))
14613 tls_type |= old_tls_type;
14615 /* We will already have issued an error message if there
14616 is a TLS/non-TLS mismatch, based on the symbol
14617 type. So just combine any TLS types needed. */
14618 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
14619 && tls_type != GOT_NORMAL)
14620 tls_type |= old_tls_type;
14622 /* If the symbol is accessed in both IE and GDESC
14623 method, we're able to relax. Turn off the GDESC flag,
14624 without messing up with any other kind of tls types
14625 that may be involved. */
14626 if ((tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GDESC))
14627 tls_type &= ~GOT_TLS_GDESC;
14629 if (old_tls_type != tls_type)
14632 elf32_arm_hash_entry (h)->tls_type = tls_type;
14634 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
14637 /* Fall through. */
14639 case R_ARM_TLS_LDM32:
14640 if (r_type == R_ARM_TLS_LDM32)
14641 htab->tls_ldm_got.refcount++;
14642 /* Fall through. */
14644 case R_ARM_GOTOFF32:
14646 if (htab->root.sgot == NULL
14647 && !create_got_section (htab->root.dynobj, info))
14656 case R_ARM_THM_CALL:
14657 case R_ARM_THM_JUMP24:
14658 case R_ARM_THM_JUMP19:
14659 call_reloc_p = TRUE;
14660 may_need_local_target_p = TRUE;
14664 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
14665 ldr __GOTT_INDEX__ offsets. */
14666 if (!htab->vxworks_p)
14668 may_need_local_target_p = TRUE;
14671 else goto jump_over;
14673 /* Fall through. */
14675 case R_ARM_MOVW_ABS_NC:
14676 case R_ARM_MOVT_ABS:
14677 case R_ARM_THM_MOVW_ABS_NC:
14678 case R_ARM_THM_MOVT_ABS:
14679 if (bfd_link_pic (info))
14681 (*_bfd_error_handler)
14682 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
14683 abfd, elf32_arm_howto_table_1[r_type].name,
14684 (h) ? h->root.root.string : "a local symbol");
14685 bfd_set_error (bfd_error_bad_value);
14689 /* Fall through. */
14691 case R_ARM_ABS32_NOI:
14693 if (h != NULL && bfd_link_executable (info))
14695 h->pointer_equality_needed = 1;
14697 /* Fall through. */
14699 case R_ARM_REL32_NOI:
14700 case R_ARM_MOVW_PREL_NC:
14701 case R_ARM_MOVT_PREL:
14702 case R_ARM_THM_MOVW_PREL_NC:
14703 case R_ARM_THM_MOVT_PREL:
14705 /* Should the interworking branches be listed here? */
14706 if ((bfd_link_pic (info) || htab->root.is_relocatable_executable)
14707 && (sec->flags & SEC_ALLOC) != 0)
14710 && elf32_arm_howto_from_type (r_type)->pc_relative)
14712 /* In shared libraries and relocatable executables,
14713 we treat local relative references as calls;
14714 see the related SYMBOL_CALLS_LOCAL code in
14715 allocate_dynrelocs. */
14716 call_reloc_p = TRUE;
14717 may_need_local_target_p = TRUE;
14720 /* We are creating a shared library or relocatable
14721 executable, and this is a reloc against a global symbol,
14722 or a non-PC-relative reloc against a local symbol.
14723 We may need to copy the reloc into the output. */
14724 may_become_dynamic_p = TRUE;
14727 may_need_local_target_p = TRUE;
14730 /* This relocation describes the C++ object vtable hierarchy.
14731 Reconstruct it for later use during GC. */
14732 case R_ARM_GNU_VTINHERIT:
14733 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
14737 /* This relocation describes which C++ vtable entries are actually
14738 used. Record for later use during GC. */
14739 case R_ARM_GNU_VTENTRY:
14740 BFD_ASSERT (h != NULL);
14742 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
14750 /* We may need a .plt entry if the function this reloc
14751 refers to is in a different object, regardless of the
14752 symbol's type. We can't tell for sure yet, because
14753 something later might force the symbol local. */
14755 else if (may_need_local_target_p)
14756 /* If this reloc is in a read-only section, we might
14757 need a copy reloc. We can't check reliably at this
14758 stage whether the section is read-only, as input
14759 sections have not yet been mapped to output sections.
14760 Tentatively set the flag for now, and correct in
14761 adjust_dynamic_symbol. */
14762 h->non_got_ref = 1;
14765 if (may_need_local_target_p
14766 && (h != NULL || ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC))
14768 union gotplt_union *root_plt;
14769 struct arm_plt_info *arm_plt;
14770 struct arm_local_iplt_info *local_iplt;
14774 root_plt = &h->plt;
14775 arm_plt = &eh->plt;
14779 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
14780 if (local_iplt == NULL)
14782 root_plt = &local_iplt->root;
14783 arm_plt = &local_iplt->arm;
14786 /* If the symbol is a function that doesn't bind locally,
14787 this relocation will need a PLT entry. */
14788 if (root_plt->refcount != -1)
14789 root_plt->refcount += 1;
14792 arm_plt->noncall_refcount++;
14794 /* It's too early to use htab->use_blx here, so we have to
14795 record possible blx references separately from
14796 relocs that definitely need a thumb stub. */
14798 if (r_type == R_ARM_THM_CALL)
14799 arm_plt->maybe_thumb_refcount += 1;
14801 if (r_type == R_ARM_THM_JUMP24
14802 || r_type == R_ARM_THM_JUMP19)
14803 arm_plt->thumb_refcount += 1;
14806 if (may_become_dynamic_p)
14808 struct elf_dyn_relocs *p, **head;
14810 /* Create a reloc section in dynobj. */
14811 if (sreloc == NULL)
14813 sreloc = _bfd_elf_make_dynamic_reloc_section
14814 (sec, dynobj, 2, abfd, ! htab->use_rel);
14816 if (sreloc == NULL)
14819 /* BPABI objects never have dynamic relocations mapped. */
14820 if (htab->symbian_p)
14824 flags = bfd_get_section_flags (dynobj, sreloc);
14825 flags &= ~(SEC_LOAD | SEC_ALLOC);
14826 bfd_set_section_flags (dynobj, sreloc, flags);
14830 /* If this is a global symbol, count the number of
14831 relocations we need for this symbol. */
14833 head = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs;
14836 head = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
14842 if (p == NULL || p->sec != sec)
14844 bfd_size_type amt = sizeof *p;
14846 p = (struct elf_dyn_relocs *) bfd_alloc (htab->root.dynobj, amt);
14856 if (elf32_arm_howto_from_type (r_type)->pc_relative)
14865 /* Unwinding tables are not referenced directly. This pass marks them as
14866 required if the corresponding code section is marked. Similarly, ARMv8-M
14867 secure entry functions can only be referenced by SG veneers which are
14868 created after the GC process. They need to be marked in case they reside in
14869 their own section (as would be the case if code was compiled with
14870 -ffunction-sections). */
14873 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
14874 elf_gc_mark_hook_fn gc_mark_hook)
14877 Elf_Internal_Shdr **elf_shdrp;
14878 asection *cmse_sec;
14879 obj_attribute *out_attr;
14880 Elf_Internal_Shdr *symtab_hdr;
14881 unsigned i, sym_count, ext_start;
14882 const struct elf_backend_data *bed;
14883 struct elf_link_hash_entry **sym_hashes;
14884 struct elf32_arm_link_hash_entry *cmse_hash;
14885 bfd_boolean again, is_v8m, first_bfd_browse = TRUE;
14887 _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook);
14889 out_attr = elf_known_obj_attributes_proc (info->output_bfd);
14890 is_v8m = out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V8M_BASE
14891 && out_attr[Tag_CPU_arch_profile].i == 'M';
14893 /* Marking EH data may cause additional code sections to be marked,
14894 requiring multiple passes. */
14899 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
14903 if (! is_arm_elf (sub))
14906 elf_shdrp = elf_elfsections (sub);
14907 for (o = sub->sections; o != NULL; o = o->next)
14909 Elf_Internal_Shdr *hdr;
14911 hdr = &elf_section_data (o)->this_hdr;
14912 if (hdr->sh_type == SHT_ARM_EXIDX
14914 && hdr->sh_link < elf_numsections (sub)
14916 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
14919 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
14924 /* Mark section holding ARMv8-M secure entry functions. We mark all
14925 of them so no need for a second browsing. */
14926 if (is_v8m && first_bfd_browse)
14928 sym_hashes = elf_sym_hashes (sub);
14929 bed = get_elf_backend_data (sub);
14930 symtab_hdr = &elf_tdata (sub)->symtab_hdr;
14931 sym_count = symtab_hdr->sh_size / bed->s->sizeof_sym;
14932 ext_start = symtab_hdr->sh_info;
14934 /* Scan symbols. */
14935 for (i = ext_start; i < sym_count; i++)
14937 cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]);
14939 /* Assume it is a special symbol. If not, cmse_scan will
14940 warn about it and user can do something about it. */
14941 if (ARM_GET_SYM_CMSE_SPCL (cmse_hash->root.target_internal))
14943 cmse_sec = cmse_hash->root.root.u.def.section;
14944 if (!cmse_sec->gc_mark
14945 && !_bfd_elf_gc_mark (info, cmse_sec, gc_mark_hook))
14951 first_bfd_browse = FALSE;
14957 /* Treat mapping symbols as special target symbols. */
14960 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
14962 return bfd_is_arm_special_symbol_name (sym->name,
14963 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
14966 /* This is a copy of elf_find_function() from elf.c except that
14967 ARM mapping symbols are ignored when looking for function names
14968 and STT_ARM_TFUNC is considered to a function type. */
14971 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
14972 asymbol ** symbols,
14973 asection * section,
14975 const char ** filename_ptr,
14976 const char ** functionname_ptr)
14978 const char * filename = NULL;
14979 asymbol * func = NULL;
14980 bfd_vma low_func = 0;
14983 for (p = symbols; *p != NULL; p++)
14985 elf_symbol_type *q;
14987 q = (elf_symbol_type *) *p;
14989 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
14994 filename = bfd_asymbol_name (&q->symbol);
14997 case STT_ARM_TFUNC:
14999 /* Skip mapping symbols. */
15000 if ((q->symbol.flags & BSF_LOCAL)
15001 && bfd_is_arm_special_symbol_name (q->symbol.name,
15002 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
15004 /* Fall through. */
15005 if (bfd_get_section (&q->symbol) == section
15006 && q->symbol.value >= low_func
15007 && q->symbol.value <= offset)
15009 func = (asymbol *) q;
15010 low_func = q->symbol.value;
15020 *filename_ptr = filename;
15021 if (functionname_ptr)
15022 *functionname_ptr = bfd_asymbol_name (func);
15028 /* Find the nearest line to a particular section and offset, for error
15029 reporting. This code is a duplicate of the code in elf.c, except
15030 that it uses arm_elf_find_function. */
15033 elf32_arm_find_nearest_line (bfd * abfd,
15034 asymbol ** symbols,
15035 asection * section,
15037 const char ** filename_ptr,
15038 const char ** functionname_ptr,
15039 unsigned int * line_ptr,
15040 unsigned int * discriminator_ptr)
15042 bfd_boolean found = FALSE;
15044 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
15045 filename_ptr, functionname_ptr,
15046 line_ptr, discriminator_ptr,
15047 dwarf_debug_sections, 0,
15048 & elf_tdata (abfd)->dwarf2_find_line_info))
15050 if (!*functionname_ptr)
15051 arm_elf_find_function (abfd, symbols, section, offset,
15052 *filename_ptr ? NULL : filename_ptr,
15058 /* Skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain
15061 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
15062 & found, filename_ptr,
15063 functionname_ptr, line_ptr,
15064 & elf_tdata (abfd)->line_info))
15067 if (found && (*functionname_ptr || *line_ptr))
15070 if (symbols == NULL)
15073 if (! arm_elf_find_function (abfd, symbols, section, offset,
15074 filename_ptr, functionname_ptr))
15082 elf32_arm_find_inliner_info (bfd * abfd,
15083 const char ** filename_ptr,
15084 const char ** functionname_ptr,
15085 unsigned int * line_ptr)
15088 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
15089 functionname_ptr, line_ptr,
15090 & elf_tdata (abfd)->dwarf2_find_line_info);
15094 /* Adjust a symbol defined by a dynamic object and referenced by a
15095 regular object. The current definition is in some section of the
15096 dynamic object, but we're not including those sections. We have to
15097 change the definition to something the rest of the link can
15101 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
15102 struct elf_link_hash_entry * h)
15106 struct elf32_arm_link_hash_entry * eh;
15107 struct elf32_arm_link_hash_table *globals;
15109 globals = elf32_arm_hash_table (info);
15110 if (globals == NULL)
15113 dynobj = elf_hash_table (info)->dynobj;
15115 /* Make sure we know what is going on here. */
15116 BFD_ASSERT (dynobj != NULL
15118 || h->type == STT_GNU_IFUNC
15119 || h->u.weakdef != NULL
15122 && !h->def_regular)));
15124 eh = (struct elf32_arm_link_hash_entry *) h;
15126 /* If this is a function, put it in the procedure linkage table. We
15127 will fill in the contents of the procedure linkage table later,
15128 when we know the address of the .got section. */
15129 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
15131 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
15132 symbol binds locally. */
15133 if (h->plt.refcount <= 0
15134 || (h->type != STT_GNU_IFUNC
15135 && (SYMBOL_CALLS_LOCAL (info, h)
15136 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
15137 && h->root.type == bfd_link_hash_undefweak))))
15139 /* This case can occur if we saw a PLT32 reloc in an input
15140 file, but the symbol was never referred to by a dynamic
15141 object, or if all references were garbage collected. In
15142 such a case, we don't actually need to build a procedure
15143 linkage table, and we can just do a PC24 reloc instead. */
15144 h->plt.offset = (bfd_vma) -1;
15145 eh->plt.thumb_refcount = 0;
15146 eh->plt.maybe_thumb_refcount = 0;
15147 eh->plt.noncall_refcount = 0;
15155 /* It's possible that we incorrectly decided a .plt reloc was
15156 needed for an R_ARM_PC24 or similar reloc to a non-function sym
15157 in check_relocs. We can't decide accurately between function
15158 and non-function syms in check-relocs; Objects loaded later in
15159 the link may change h->type. So fix it now. */
15160 h->plt.offset = (bfd_vma) -1;
15161 eh->plt.thumb_refcount = 0;
15162 eh->plt.maybe_thumb_refcount = 0;
15163 eh->plt.noncall_refcount = 0;
15166 /* If this is a weak symbol, and there is a real definition, the
15167 processor independent code will have arranged for us to see the
15168 real definition first, and we can just use the same value. */
15169 if (h->u.weakdef != NULL)
15171 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
15172 || h->u.weakdef->root.type == bfd_link_hash_defweak);
15173 h->root.u.def.section = h->u.weakdef->root.u.def.section;
15174 h->root.u.def.value = h->u.weakdef->root.u.def.value;
15178 /* If there are no non-GOT references, we do not need a copy
15180 if (!h->non_got_ref)
15183 /* This is a reference to a symbol defined by a dynamic object which
15184 is not a function. */
15186 /* If we are creating a shared library, we must presume that the
15187 only references to the symbol are via the global offset table.
15188 For such cases we need not do anything here; the relocations will
15189 be handled correctly by relocate_section. Relocatable executables
15190 can reference data in shared objects directly, so we don't need to
15191 do anything here. */
15192 if (bfd_link_pic (info) || globals->root.is_relocatable_executable)
15195 /* We must allocate the symbol in our .dynbss section, which will
15196 become part of the .bss section of the executable. There will be
15197 an entry for this symbol in the .dynsym section. The dynamic
15198 object will contain position independent code, so all references
15199 from the dynamic object to this symbol will go through the global
15200 offset table. The dynamic linker will use the .dynsym entry to
15201 determine the address it must put in the global offset table, so
15202 both the dynamic object and the regular object will refer to the
15203 same memory location for the variable. */
15204 s = bfd_get_linker_section (dynobj, ".dynbss");
15205 BFD_ASSERT (s != NULL);
15207 /* If allowed, we must generate a R_ARM_COPY reloc to tell the dynamic
15208 linker to copy the initial value out of the dynamic object and into
15209 the runtime process image. We need to remember the offset into the
15210 .rel(a).bss section we are going to use. */
15211 if (info->nocopyreloc == 0
15212 && (h->root.u.def.section->flags & SEC_ALLOC) != 0
15217 srel = bfd_get_linker_section (dynobj, RELOC_SECTION (globals, ".bss"));
15218 elf32_arm_allocate_dynrelocs (info, srel, 1);
15222 return _bfd_elf_adjust_dynamic_copy (info, h, s);
15225 /* Allocate space in .plt, .got and associated reloc sections for
15229 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf)
15231 struct bfd_link_info *info;
15232 struct elf32_arm_link_hash_table *htab;
15233 struct elf32_arm_link_hash_entry *eh;
15234 struct elf_dyn_relocs *p;
15236 if (h->root.type == bfd_link_hash_indirect)
15239 eh = (struct elf32_arm_link_hash_entry *) h;
15241 info = (struct bfd_link_info *) inf;
15242 htab = elf32_arm_hash_table (info);
15246 if ((htab->root.dynamic_sections_created || h->type == STT_GNU_IFUNC)
15247 && h->plt.refcount > 0)
15249 /* Make sure this symbol is output as a dynamic symbol.
15250 Undefined weak syms won't yet be marked as dynamic. */
15251 if (h->dynindx == -1
15252 && !h->forced_local)
15254 if (! bfd_elf_link_record_dynamic_symbol (info, h))
15258 /* If the call in the PLT entry binds locally, the associated
15259 GOT entry should use an R_ARM_IRELATIVE relocation instead of
15260 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
15261 than the .plt section. */
15262 if (h->type == STT_GNU_IFUNC && SYMBOL_CALLS_LOCAL (info, h))
15265 if (eh->plt.noncall_refcount == 0
15266 && SYMBOL_REFERENCES_LOCAL (info, h))
15267 /* All non-call references can be resolved directly.
15268 This means that they can (and in some cases, must)
15269 resolve directly to the run-time target, rather than
15270 to the PLT. That in turns means that any .got entry
15271 would be equal to the .igot.plt entry, so there's
15272 no point having both. */
15273 h->got.refcount = 0;
15276 if (bfd_link_pic (info)
15278 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
15280 elf32_arm_allocate_plt_entry (info, eh->is_iplt, &h->plt, &eh->plt);
15282 /* If this symbol is not defined in a regular file, and we are
15283 not generating a shared library, then set the symbol to this
15284 location in the .plt. This is required to make function
15285 pointers compare as equal between the normal executable and
15286 the shared library. */
15287 if (! bfd_link_pic (info)
15288 && !h->def_regular)
15290 h->root.u.def.section = htab->root.splt;
15291 h->root.u.def.value = h->plt.offset;
15293 /* Make sure the function is not marked as Thumb, in case
15294 it is the target of an ABS32 relocation, which will
15295 point to the PLT entry. */
15296 ARM_SET_SYM_BRANCH_TYPE (h->target_internal, ST_BRANCH_TO_ARM);
15299 /* VxWorks executables have a second set of relocations for
15300 each PLT entry. They go in a separate relocation section,
15301 which is processed by the kernel loader. */
15302 if (htab->vxworks_p && !bfd_link_pic (info))
15304 /* There is a relocation for the initial PLT entry:
15305 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
15306 if (h->plt.offset == htab->plt_header_size)
15307 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 1);
15309 /* There are two extra relocations for each subsequent
15310 PLT entry: an R_ARM_32 relocation for the GOT entry,
15311 and an R_ARM_32 relocation for the PLT entry. */
15312 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 2);
15317 h->plt.offset = (bfd_vma) -1;
15323 h->plt.offset = (bfd_vma) -1;
15327 eh = (struct elf32_arm_link_hash_entry *) h;
15328 eh->tlsdesc_got = (bfd_vma) -1;
15330 if (h->got.refcount > 0)
15334 int tls_type = elf32_arm_hash_entry (h)->tls_type;
15337 /* Make sure this symbol is output as a dynamic symbol.
15338 Undefined weak syms won't yet be marked as dynamic. */
15339 if (h->dynindx == -1
15340 && !h->forced_local)
15342 if (! bfd_elf_link_record_dynamic_symbol (info, h))
15346 if (!htab->symbian_p)
15348 s = htab->root.sgot;
15349 h->got.offset = s->size;
15351 if (tls_type == GOT_UNKNOWN)
15354 if (tls_type == GOT_NORMAL)
15355 /* Non-TLS symbols need one GOT slot. */
15359 if (tls_type & GOT_TLS_GDESC)
15361 /* R_ARM_TLS_DESC needs 2 GOT slots. */
15363 = (htab->root.sgotplt->size
15364 - elf32_arm_compute_jump_table_size (htab));
15365 htab->root.sgotplt->size += 8;
15366 h->got.offset = (bfd_vma) -2;
15367 /* plt.got_offset needs to know there's a TLS_DESC
15368 reloc in the middle of .got.plt. */
15369 htab->num_tls_desc++;
15372 if (tls_type & GOT_TLS_GD)
15374 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
15375 the symbol is both GD and GDESC, got.offset may
15376 have been overwritten. */
15377 h->got.offset = s->size;
15381 if (tls_type & GOT_TLS_IE)
15382 /* R_ARM_TLS_IE32 needs one GOT slot. */
15386 dyn = htab->root.dynamic_sections_created;
15389 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
15390 bfd_link_pic (info),
15392 && (!bfd_link_pic (info)
15393 || !SYMBOL_REFERENCES_LOCAL (info, h)))
15396 if (tls_type != GOT_NORMAL
15397 && (bfd_link_pic (info) || indx != 0)
15398 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
15399 || h->root.type != bfd_link_hash_undefweak))
15401 if (tls_type & GOT_TLS_IE)
15402 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15404 if (tls_type & GOT_TLS_GD)
15405 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15407 if (tls_type & GOT_TLS_GDESC)
15409 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
15410 /* GDESC needs a trampoline to jump to. */
15411 htab->tls_trampoline = -1;
15414 /* Only GD needs it. GDESC just emits one relocation per
15416 if ((tls_type & GOT_TLS_GD) && indx != 0)
15417 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15419 else if (indx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))
15421 if (htab->root.dynamic_sections_created)
15422 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
15423 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15425 else if (h->type == STT_GNU_IFUNC
15426 && eh->plt.noncall_refcount == 0)
15427 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
15428 they all resolve dynamically instead. Reserve room for the
15429 GOT entry's R_ARM_IRELATIVE relocation. */
15430 elf32_arm_allocate_irelocs (info, htab->root.srelgot, 1);
15431 else if (bfd_link_pic (info)
15432 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
15433 || h->root.type != bfd_link_hash_undefweak))
15434 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
15435 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15439 h->got.offset = (bfd_vma) -1;
15441 /* Allocate stubs for exported Thumb functions on v4t. */
15442 if (!htab->use_blx && h->dynindx != -1
15444 && ARM_GET_SYM_BRANCH_TYPE (h->target_internal) == ST_BRANCH_TO_THUMB
15445 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
15447 struct elf_link_hash_entry * th;
15448 struct bfd_link_hash_entry * bh;
15449 struct elf_link_hash_entry * myh;
15453 /* Create a new symbol to regist the real location of the function. */
15454 s = h->root.u.def.section;
15455 sprintf (name, "__real_%s", h->root.root.string);
15456 _bfd_generic_link_add_one_symbol (info, s->owner,
15457 name, BSF_GLOBAL, s,
15458 h->root.u.def.value,
15459 NULL, TRUE, FALSE, &bh);
15461 myh = (struct elf_link_hash_entry *) bh;
15462 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
15463 myh->forced_local = 1;
15464 ARM_SET_SYM_BRANCH_TYPE (myh->target_internal, ST_BRANCH_TO_THUMB);
15465 eh->export_glue = myh;
15466 th = record_arm_to_thumb_glue (info, h);
15467 /* Point the symbol at the stub. */
15468 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
15469 ARM_SET_SYM_BRANCH_TYPE (h->target_internal, ST_BRANCH_TO_ARM);
15470 h->root.u.def.section = th->root.u.def.section;
15471 h->root.u.def.value = th->root.u.def.value & ~1;
15474 if (eh->dyn_relocs == NULL)
15477 /* In the shared -Bsymbolic case, discard space allocated for
15478 dynamic pc-relative relocs against symbols which turn out to be
15479 defined in regular objects. For the normal shared case, discard
15480 space for pc-relative relocs that have become local due to symbol
15481 visibility changes. */
15483 if (bfd_link_pic (info) || htab->root.is_relocatable_executable)
15485 /* Relocs that use pc_count are PC-relative forms, which will appear
15486 on something like ".long foo - ." or "movw REG, foo - .". We want
15487 calls to protected symbols to resolve directly to the function
15488 rather than going via the plt. If people want function pointer
15489 comparisons to work as expected then they should avoid writing
15490 assembly like ".long foo - .". */
15491 if (SYMBOL_CALLS_LOCAL (info, h))
15493 struct elf_dyn_relocs **pp;
15495 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
15497 p->count -= p->pc_count;
15506 if (htab->vxworks_p)
15508 struct elf_dyn_relocs **pp;
15510 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
15512 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
15519 /* Also discard relocs on undefined weak syms with non-default
15521 if (eh->dyn_relocs != NULL
15522 && h->root.type == bfd_link_hash_undefweak)
15524 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
15525 eh->dyn_relocs = NULL;
15527 /* Make sure undefined weak symbols are output as a dynamic
15529 else if (h->dynindx == -1
15530 && !h->forced_local)
15532 if (! bfd_elf_link_record_dynamic_symbol (info, h))
15537 else if (htab->root.is_relocatable_executable && h->dynindx == -1
15538 && h->root.type == bfd_link_hash_new)
15540 /* Output absolute symbols so that we can create relocations
15541 against them. For normal symbols we output a relocation
15542 against the section that contains them. */
15543 if (! bfd_elf_link_record_dynamic_symbol (info, h))
15550 /* For the non-shared case, discard space for relocs against
15551 symbols which turn out to need copy relocs or are not
15554 if (!h->non_got_ref
15555 && ((h->def_dynamic
15556 && !h->def_regular)
15557 || (htab->root.dynamic_sections_created
15558 && (h->root.type == bfd_link_hash_undefweak
15559 || h->root.type == bfd_link_hash_undefined))))
15561 /* Make sure this symbol is output as a dynamic symbol.
15562 Undefined weak syms won't yet be marked as dynamic. */
15563 if (h->dynindx == -1
15564 && !h->forced_local)
15566 if (! bfd_elf_link_record_dynamic_symbol (info, h))
15570 /* If that succeeded, we know we'll be keeping all the
15572 if (h->dynindx != -1)
15576 eh->dyn_relocs = NULL;
15581 /* Finally, allocate space. */
15582 for (p = eh->dyn_relocs; p != NULL; p = p->next)
15584 asection *sreloc = elf_section_data (p->sec)->sreloc;
15585 if (h->type == STT_GNU_IFUNC
15586 && eh->plt.noncall_refcount == 0
15587 && SYMBOL_REFERENCES_LOCAL (info, h))
15588 elf32_arm_allocate_irelocs (info, sreloc, p->count);
15590 elf32_arm_allocate_dynrelocs (info, sreloc, p->count);
15596 /* Find any dynamic relocs that apply to read-only sections. */
15599 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
15601 struct elf32_arm_link_hash_entry * eh;
15602 struct elf_dyn_relocs * p;
15604 eh = (struct elf32_arm_link_hash_entry *) h;
15605 for (p = eh->dyn_relocs; p != NULL; p = p->next)
15607 asection *s = p->sec;
15609 if (s != NULL && (s->flags & SEC_READONLY) != 0)
15611 struct bfd_link_info *info = (struct bfd_link_info *) inf;
15613 info->flags |= DF_TEXTREL;
15615 /* Not an error, just cut short the traversal. */
15623 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
15626 struct elf32_arm_link_hash_table *globals;
15628 globals = elf32_arm_hash_table (info);
15629 if (globals == NULL)
15632 globals->byteswap_code = byteswap_code;
15635 /* Set the sizes of the dynamic sections. */
15638 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
15639 struct bfd_link_info * info)
15644 bfd_boolean relocs;
15646 struct elf32_arm_link_hash_table *htab;
15648 htab = elf32_arm_hash_table (info);
15652 dynobj = elf_hash_table (info)->dynobj;
15653 BFD_ASSERT (dynobj != NULL);
15654 check_use_blx (htab);
15656 if (elf_hash_table (info)->dynamic_sections_created)
15658 /* Set the contents of the .interp section to the interpreter. */
15659 if (bfd_link_executable (info) && !info->nointerp)
15661 s = bfd_get_linker_section (dynobj, ".interp");
15662 BFD_ASSERT (s != NULL);
15663 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
15664 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
15668 /* Set up .got offsets for local syms, and space for local dynamic
15670 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
15672 bfd_signed_vma *local_got;
15673 bfd_signed_vma *end_local_got;
15674 struct arm_local_iplt_info **local_iplt_ptr, *local_iplt;
15675 char *local_tls_type;
15676 bfd_vma *local_tlsdesc_gotent;
15677 bfd_size_type locsymcount;
15678 Elf_Internal_Shdr *symtab_hdr;
15680 bfd_boolean is_vxworks = htab->vxworks_p;
15681 unsigned int symndx;
15683 if (! is_arm_elf (ibfd))
15686 for (s = ibfd->sections; s != NULL; s = s->next)
15688 struct elf_dyn_relocs *p;
15690 for (p = (struct elf_dyn_relocs *)
15691 elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
15693 if (!bfd_is_abs_section (p->sec)
15694 && bfd_is_abs_section (p->sec->output_section))
15696 /* Input section has been discarded, either because
15697 it is a copy of a linkonce section or due to
15698 linker script /DISCARD/, so we'll be discarding
15701 else if (is_vxworks
15702 && strcmp (p->sec->output_section->name,
15705 /* Relocations in vxworks .tls_vars sections are
15706 handled specially by the loader. */
15708 else if (p->count != 0)
15710 srel = elf_section_data (p->sec)->sreloc;
15711 elf32_arm_allocate_dynrelocs (info, srel, p->count);
15712 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
15713 info->flags |= DF_TEXTREL;
15718 local_got = elf_local_got_refcounts (ibfd);
15722 symtab_hdr = & elf_symtab_hdr (ibfd);
15723 locsymcount = symtab_hdr->sh_info;
15724 end_local_got = local_got + locsymcount;
15725 local_iplt_ptr = elf32_arm_local_iplt (ibfd);
15726 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
15727 local_tlsdesc_gotent = elf32_arm_local_tlsdesc_gotent (ibfd);
15729 s = htab->root.sgot;
15730 srel = htab->root.srelgot;
15731 for (; local_got < end_local_got;
15732 ++local_got, ++local_iplt_ptr, ++local_tls_type,
15733 ++local_tlsdesc_gotent, ++symndx)
15735 *local_tlsdesc_gotent = (bfd_vma) -1;
15736 local_iplt = *local_iplt_ptr;
15737 if (local_iplt != NULL)
15739 struct elf_dyn_relocs *p;
15741 if (local_iplt->root.refcount > 0)
15743 elf32_arm_allocate_plt_entry (info, TRUE,
15746 if (local_iplt->arm.noncall_refcount == 0)
15747 /* All references to the PLT are calls, so all
15748 non-call references can resolve directly to the
15749 run-time target. This means that the .got entry
15750 would be the same as the .igot.plt entry, so there's
15751 no point creating both. */
15756 BFD_ASSERT (local_iplt->arm.noncall_refcount == 0);
15757 local_iplt->root.offset = (bfd_vma) -1;
15760 for (p = local_iplt->dyn_relocs; p != NULL; p = p->next)
15764 psrel = elf_section_data (p->sec)->sreloc;
15765 if (local_iplt->arm.noncall_refcount == 0)
15766 elf32_arm_allocate_irelocs (info, psrel, p->count);
15768 elf32_arm_allocate_dynrelocs (info, psrel, p->count);
15771 if (*local_got > 0)
15773 Elf_Internal_Sym *isym;
15775 *local_got = s->size;
15776 if (*local_tls_type & GOT_TLS_GD)
15777 /* TLS_GD relocs need an 8-byte structure in the GOT. */
15779 if (*local_tls_type & GOT_TLS_GDESC)
15781 *local_tlsdesc_gotent = htab->root.sgotplt->size
15782 - elf32_arm_compute_jump_table_size (htab);
15783 htab->root.sgotplt->size += 8;
15784 *local_got = (bfd_vma) -2;
15785 /* plt.got_offset needs to know there's a TLS_DESC
15786 reloc in the middle of .got.plt. */
15787 htab->num_tls_desc++;
15789 if (*local_tls_type & GOT_TLS_IE)
15792 if (*local_tls_type & GOT_NORMAL)
15794 /* If the symbol is both GD and GDESC, *local_got
15795 may have been overwritten. */
15796 *local_got = s->size;
15800 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, symndx);
15804 /* If all references to an STT_GNU_IFUNC PLT are calls,
15805 then all non-call references, including this GOT entry,
15806 resolve directly to the run-time target. */
15807 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
15808 && (local_iplt == NULL
15809 || local_iplt->arm.noncall_refcount == 0))
15810 elf32_arm_allocate_irelocs (info, srel, 1);
15811 else if (bfd_link_pic (info) || output_bfd->flags & DYNAMIC)
15813 if ((bfd_link_pic (info) && !(*local_tls_type & GOT_TLS_GDESC))
15814 || *local_tls_type & GOT_TLS_GD)
15815 elf32_arm_allocate_dynrelocs (info, srel, 1);
15817 if (bfd_link_pic (info) && *local_tls_type & GOT_TLS_GDESC)
15819 elf32_arm_allocate_dynrelocs (info,
15820 htab->root.srelplt, 1);
15821 htab->tls_trampoline = -1;
15826 *local_got = (bfd_vma) -1;
15830 if (htab->tls_ldm_got.refcount > 0)
15832 /* Allocate two GOT entries and one dynamic relocation (if necessary)
15833 for R_ARM_TLS_LDM32 relocations. */
15834 htab->tls_ldm_got.offset = htab->root.sgot->size;
15835 htab->root.sgot->size += 8;
15836 if (bfd_link_pic (info))
15837 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15840 htab->tls_ldm_got.offset = -1;
15842 /* Allocate global sym .plt and .got entries, and space for global
15843 sym dynamic relocs. */
15844 elf_link_hash_traverse (& htab->root, allocate_dynrelocs_for_symbol, info);
15846 /* Here we rummage through the found bfds to collect glue information. */
15847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
15849 if (! is_arm_elf (ibfd))
15852 /* Initialise mapping tables for code/data. */
15853 bfd_elf32_arm_init_maps (ibfd);
15855 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
15856 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info)
15857 || !bfd_elf32_arm_stm32l4xx_erratum_scan (ibfd, info))
15858 /* xgettext:c-format */
15859 _bfd_error_handler (_("Errors encountered processing file %s"),
15863 /* Allocate space for the glue sections now that we've sized them. */
15864 bfd_elf32_arm_allocate_interworking_sections (info);
15866 /* For every jump slot reserved in the sgotplt, reloc_count is
15867 incremented. However, when we reserve space for TLS descriptors,
15868 it's not incremented, so in order to compute the space reserved
15869 for them, it suffices to multiply the reloc count by the jump
15871 if (htab->root.srelplt)
15872 htab->sgotplt_jump_table_size = elf32_arm_compute_jump_table_size(htab);
15874 if (htab->tls_trampoline)
15876 if (htab->root.splt->size == 0)
15877 htab->root.splt->size += htab->plt_header_size;
15879 htab->tls_trampoline = htab->root.splt->size;
15880 htab->root.splt->size += htab->plt_entry_size;
15882 /* If we're not using lazy TLS relocations, don't generate the
15883 PLT and GOT entries they require. */
15884 if (!(info->flags & DF_BIND_NOW))
15886 htab->dt_tlsdesc_got = htab->root.sgot->size;
15887 htab->root.sgot->size += 4;
15889 htab->dt_tlsdesc_plt = htab->root.splt->size;
15890 htab->root.splt->size += 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline);
15894 /* The check_relocs and adjust_dynamic_symbol entry points have
15895 determined the sizes of the various dynamic sections. Allocate
15896 memory for them. */
15899 for (s = dynobj->sections; s != NULL; s = s->next)
15903 if ((s->flags & SEC_LINKER_CREATED) == 0)
15906 /* It's OK to base decisions on the section name, because none
15907 of the dynobj section names depend upon the input files. */
15908 name = bfd_get_section_name (dynobj, s);
15910 if (s == htab->root.splt)
15912 /* Remember whether there is a PLT. */
15913 plt = s->size != 0;
15915 else if (CONST_STRNEQ (name, ".rel"))
15919 /* Remember whether there are any reloc sections other
15920 than .rel(a).plt and .rela.plt.unloaded. */
15921 if (s != htab->root.srelplt && s != htab->srelplt2)
15924 /* We use the reloc_count field as a counter if we need
15925 to copy relocs into the output file. */
15926 s->reloc_count = 0;
15929 else if (s != htab->root.sgot
15930 && s != htab->root.sgotplt
15931 && s != htab->root.iplt
15932 && s != htab->root.igotplt
15933 && s != htab->sdynbss)
15935 /* It's not one of our sections, so don't allocate space. */
15941 /* If we don't need this section, strip it from the
15942 output file. This is mostly to handle .rel(a).bss and
15943 .rel(a).plt. We must create both sections in
15944 create_dynamic_sections, because they must be created
15945 before the linker maps input sections to output
15946 sections. The linker does that before
15947 adjust_dynamic_symbol is called, and it is that
15948 function which decides whether anything needs to go
15949 into these sections. */
15950 s->flags |= SEC_EXCLUDE;
15954 if ((s->flags & SEC_HAS_CONTENTS) == 0)
15957 /* Allocate memory for the section contents. */
15958 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
15959 if (s->contents == NULL)
15963 if (elf_hash_table (info)->dynamic_sections_created)
15965 /* Add some entries to the .dynamic section. We fill in the
15966 values later, in elf32_arm_finish_dynamic_sections, but we
15967 must add the entries now so that we get the correct size for
15968 the .dynamic section. The DT_DEBUG entry is filled in by the
15969 dynamic linker and used by the debugger. */
15970 #define add_dynamic_entry(TAG, VAL) \
15971 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
15973 if (bfd_link_executable (info))
15975 if (!add_dynamic_entry (DT_DEBUG, 0))
15981 if ( !add_dynamic_entry (DT_PLTGOT, 0)
15982 || !add_dynamic_entry (DT_PLTRELSZ, 0)
15983 || !add_dynamic_entry (DT_PLTREL,
15984 htab->use_rel ? DT_REL : DT_RELA)
15985 || !add_dynamic_entry (DT_JMPREL, 0))
15988 if (htab->dt_tlsdesc_plt
15989 && (!add_dynamic_entry (DT_TLSDESC_PLT,0)
15990 || !add_dynamic_entry (DT_TLSDESC_GOT,0)))
15998 if (!add_dynamic_entry (DT_REL, 0)
15999 || !add_dynamic_entry (DT_RELSZ, 0)
16000 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
16005 if (!add_dynamic_entry (DT_RELA, 0)
16006 || !add_dynamic_entry (DT_RELASZ, 0)
16007 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
16012 /* If any dynamic relocs apply to a read-only section,
16013 then we need a DT_TEXTREL entry. */
16014 if ((info->flags & DF_TEXTREL) == 0)
16015 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
16018 if ((info->flags & DF_TEXTREL) != 0)
16020 if (!add_dynamic_entry (DT_TEXTREL, 0))
16023 if (htab->vxworks_p
16024 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
16027 #undef add_dynamic_entry
16032 /* Size sections even though they're not dynamic. We use it to setup
16033 _TLS_MODULE_BASE_, if needed. */
16036 elf32_arm_always_size_sections (bfd *output_bfd,
16037 struct bfd_link_info *info)
16041 if (bfd_link_relocatable (info))
16044 tls_sec = elf_hash_table (info)->tls_sec;
16048 struct elf_link_hash_entry *tlsbase;
16050 tlsbase = elf_link_hash_lookup
16051 (elf_hash_table (info), "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
16055 struct bfd_link_hash_entry *bh = NULL;
16056 const struct elf_backend_data *bed
16057 = get_elf_backend_data (output_bfd);
16059 if (!(_bfd_generic_link_add_one_symbol
16060 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
16061 tls_sec, 0, NULL, FALSE,
16062 bed->collect, &bh)))
16065 tlsbase->type = STT_TLS;
16066 tlsbase = (struct elf_link_hash_entry *)bh;
16067 tlsbase->def_regular = 1;
16068 tlsbase->other = STV_HIDDEN;
16069 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
16075 /* Finish up dynamic symbol handling. We set the contents of various
16076 dynamic sections here. */
16079 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
16080 struct bfd_link_info * info,
16081 struct elf_link_hash_entry * h,
16082 Elf_Internal_Sym * sym)
16084 struct elf32_arm_link_hash_table *htab;
16085 struct elf32_arm_link_hash_entry *eh;
16087 htab = elf32_arm_hash_table (info);
16091 eh = (struct elf32_arm_link_hash_entry *) h;
16093 if (h->plt.offset != (bfd_vma) -1)
16097 BFD_ASSERT (h->dynindx != -1);
16098 if (! elf32_arm_populate_plt_entry (output_bfd, info, &h->plt, &eh->plt,
16103 if (!h->def_regular)
16105 /* Mark the symbol as undefined, rather than as defined in
16106 the .plt section. */
16107 sym->st_shndx = SHN_UNDEF;
16108 /* If the symbol is weak we need to clear the value.
16109 Otherwise, the PLT entry would provide a definition for
16110 the symbol even if the symbol wasn't defined anywhere,
16111 and so the symbol would never be NULL. Leave the value if
16112 there were any relocations where pointer equality matters
16113 (this is a clue for the dynamic linker, to make function
16114 pointer comparisons work between an application and shared
16116 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
16119 else if (eh->is_iplt && eh->plt.noncall_refcount != 0)
16121 /* At least one non-call relocation references this .iplt entry,
16122 so the .iplt entry is the function's canonical address. */
16123 sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC);
16124 ARM_SET_SYM_BRANCH_TYPE (sym->st_target_internal, ST_BRANCH_TO_ARM);
16125 sym->st_shndx = (_bfd_elf_section_from_bfd_section
16126 (output_bfd, htab->root.iplt->output_section));
16127 sym->st_value = (h->plt.offset
16128 + htab->root.iplt->output_section->vma
16129 + htab->root.iplt->output_offset);
16136 Elf_Internal_Rela rel;
16138 /* This symbol needs a copy reloc. Set it up. */
16139 BFD_ASSERT (h->dynindx != -1
16140 && (h->root.type == bfd_link_hash_defined
16141 || h->root.type == bfd_link_hash_defweak));
16144 BFD_ASSERT (s != NULL);
16147 rel.r_offset = (h->root.u.def.value
16148 + h->root.u.def.section->output_section->vma
16149 + h->root.u.def.section->output_offset);
16150 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
16151 elf32_arm_add_dynreloc (output_bfd, info, s, &rel);
16154 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
16155 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
16156 to the ".got" section. */
16157 if (h == htab->root.hdynamic
16158 || (!htab->vxworks_p && h == htab->root.hgot))
16159 sym->st_shndx = SHN_ABS;
16165 arm_put_trampoline (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
16167 const unsigned long *template, unsigned count)
16171 for (ix = 0; ix != count; ix++)
16173 unsigned long insn = template[ix];
16175 /* Emit mov pc,rx if bx is not permitted. */
16176 if (htab->fix_v4bx == 1 && (insn & 0x0ffffff0) == 0x012fff10)
16177 insn = (insn & 0xf000000f) | 0x01a0f000;
16178 put_arm_insn (htab, output_bfd, insn, (char *)contents + ix*4);
16182 /* Install the special first PLT entry for elf32-arm-nacl. Unlike
16183 other variants, NaCl needs this entry in a static executable's
16184 .iplt too. When we're handling that case, GOT_DISPLACEMENT is
16185 zero. For .iplt really only the last bundle is useful, and .iplt
16186 could have a shorter first entry, with each individual PLT entry's
16187 relative branch calculated differently so it targets the last
16188 bundle instead of the instruction before it (labelled .Lplt_tail
16189 above). But it's simpler to keep the size and layout of PLT0
16190 consistent with the dynamic case, at the cost of some dead code at
16191 the start of .iplt and the one dead store to the stack at the start
16194 arm_nacl_put_plt0 (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
16195 asection *plt, bfd_vma got_displacement)
16199 put_arm_insn (htab, output_bfd,
16200 elf32_arm_nacl_plt0_entry[0]
16201 | arm_movw_immediate (got_displacement),
16202 plt->contents + 0);
16203 put_arm_insn (htab, output_bfd,
16204 elf32_arm_nacl_plt0_entry[1]
16205 | arm_movt_immediate (got_displacement),
16206 plt->contents + 4);
16208 for (i = 2; i < ARRAY_SIZE (elf32_arm_nacl_plt0_entry); ++i)
16209 put_arm_insn (htab, output_bfd,
16210 elf32_arm_nacl_plt0_entry[i],
16211 plt->contents + (i * 4));
16214 /* Finish up the dynamic sections. */
16217 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
16222 struct elf32_arm_link_hash_table *htab;
16224 htab = elf32_arm_hash_table (info);
16228 dynobj = elf_hash_table (info)->dynobj;
16230 sgot = htab->root.sgotplt;
16231 /* A broken linker script might have discarded the dynamic sections.
16232 Catch this here so that we do not seg-fault later on. */
16233 if (sgot != NULL && bfd_is_abs_section (sgot->output_section))
16235 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
16237 if (elf_hash_table (info)->dynamic_sections_created)
16240 Elf32_External_Dyn *dyncon, *dynconend;
16242 splt = htab->root.splt;
16243 BFD_ASSERT (splt != NULL && sdyn != NULL);
16244 BFD_ASSERT (htab->symbian_p || sgot != NULL);
16246 dyncon = (Elf32_External_Dyn *) sdyn->contents;
16247 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
16249 for (; dyncon < dynconend; dyncon++)
16251 Elf_Internal_Dyn dyn;
16255 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
16262 if (htab->vxworks_p
16263 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
16264 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16269 goto get_vma_if_bpabi;
16272 goto get_vma_if_bpabi;
16275 goto get_vma_if_bpabi;
16277 name = ".gnu.version";
16278 goto get_vma_if_bpabi;
16280 name = ".gnu.version_d";
16281 goto get_vma_if_bpabi;
16283 name = ".gnu.version_r";
16284 goto get_vma_if_bpabi;
16287 name = htab->symbian_p ? ".got" : ".got.plt";
16290 name = RELOC_SECTION (htab, ".plt");
16292 s = bfd_get_linker_section (dynobj, name);
16295 (*_bfd_error_handler)
16296 (_("could not find section %s"), name);
16297 bfd_set_error (bfd_error_invalid_operation);
16300 if (!htab->symbian_p)
16301 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
16303 /* In the BPABI, tags in the PT_DYNAMIC section point
16304 at the file offset, not the memory address, for the
16305 convenience of the post linker. */
16306 dyn.d_un.d_ptr = s->output_section->filepos + s->output_offset;
16307 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16311 if (htab->symbian_p)
16316 s = htab->root.srelplt;
16317 BFD_ASSERT (s != NULL);
16318 dyn.d_un.d_val = s->size;
16319 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16324 if (!htab->symbian_p)
16326 /* My reading of the SVR4 ABI indicates that the
16327 procedure linkage table relocs (DT_JMPREL) should be
16328 included in the overall relocs (DT_REL). This is
16329 what Solaris does. However, UnixWare can not handle
16330 that case. Therefore, we override the DT_RELSZ entry
16331 here to make it not include the JMPREL relocs. Since
16332 the linker script arranges for .rel(a).plt to follow all
16333 other relocation sections, we don't have to worry
16334 about changing the DT_REL entry. */
16335 s = htab->root.srelplt;
16337 dyn.d_un.d_val -= s->size;
16338 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16341 /* Fall through. */
16345 /* In the BPABI, the DT_REL tag must point at the file
16346 offset, not the VMA, of the first relocation
16347 section. So, we use code similar to that in
16348 elflink.c, but do not check for SHF_ALLOC on the
16349 relcoation section, since relocations sections are
16350 never allocated under the BPABI. The comments above
16351 about Unixware notwithstanding, we include all of the
16352 relocations here. */
16353 if (htab->symbian_p)
16356 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
16357 ? SHT_REL : SHT_RELA);
16358 dyn.d_un.d_val = 0;
16359 for (i = 1; i < elf_numsections (output_bfd); i++)
16361 Elf_Internal_Shdr *hdr
16362 = elf_elfsections (output_bfd)[i];
16363 if (hdr->sh_type == type)
16365 if (dyn.d_tag == DT_RELSZ
16366 || dyn.d_tag == DT_RELASZ)
16367 dyn.d_un.d_val += hdr->sh_size;
16368 else if ((ufile_ptr) hdr->sh_offset
16369 <= dyn.d_un.d_val - 1)
16370 dyn.d_un.d_val = hdr->sh_offset;
16373 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16377 case DT_TLSDESC_PLT:
16378 s = htab->root.splt;
16379 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
16380 + htab->dt_tlsdesc_plt);
16381 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16384 case DT_TLSDESC_GOT:
16385 s = htab->root.sgot;
16386 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
16387 + htab->dt_tlsdesc_got);
16388 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16391 /* Set the bottom bit of DT_INIT/FINI if the
16392 corresponding function is Thumb. */
16394 name = info->init_function;
16397 name = info->fini_function;
16399 /* If it wasn't set by elf_bfd_final_link
16400 then there is nothing to adjust. */
16401 if (dyn.d_un.d_val != 0)
16403 struct elf_link_hash_entry * eh;
16405 eh = elf_link_hash_lookup (elf_hash_table (info), name,
16406 FALSE, FALSE, TRUE);
16408 && ARM_GET_SYM_BRANCH_TYPE (eh->target_internal)
16409 == ST_BRANCH_TO_THUMB)
16411 dyn.d_un.d_val |= 1;
16412 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
16419 /* Fill in the first entry in the procedure linkage table. */
16420 if (splt->size > 0 && htab->plt_header_size)
16422 const bfd_vma *plt0_entry;
16423 bfd_vma got_address, plt_address, got_displacement;
16425 /* Calculate the addresses of the GOT and PLT. */
16426 got_address = sgot->output_section->vma + sgot->output_offset;
16427 plt_address = splt->output_section->vma + splt->output_offset;
16429 if (htab->vxworks_p)
16431 /* The VxWorks GOT is relocated by the dynamic linker.
16432 Therefore, we must emit relocations rather than simply
16433 computing the values now. */
16434 Elf_Internal_Rela rel;
16436 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
16437 put_arm_insn (htab, output_bfd, plt0_entry[0],
16438 splt->contents + 0);
16439 put_arm_insn (htab, output_bfd, plt0_entry[1],
16440 splt->contents + 4);
16441 put_arm_insn (htab, output_bfd, plt0_entry[2],
16442 splt->contents + 8);
16443 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
16445 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
16446 rel.r_offset = plt_address + 12;
16447 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
16449 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
16450 htab->srelplt2->contents);
16452 else if (htab->nacl_p)
16453 arm_nacl_put_plt0 (htab, output_bfd, splt,
16454 got_address + 8 - (plt_address + 16));
16455 else if (using_thumb_only (htab))
16457 got_displacement = got_address - (plt_address + 12);
16459 plt0_entry = elf32_thumb2_plt0_entry;
16460 put_arm_insn (htab, output_bfd, plt0_entry[0],
16461 splt->contents + 0);
16462 put_arm_insn (htab, output_bfd, plt0_entry[1],
16463 splt->contents + 4);
16464 put_arm_insn (htab, output_bfd, plt0_entry[2],
16465 splt->contents + 8);
16467 bfd_put_32 (output_bfd, got_displacement, splt->contents + 12);
16471 got_displacement = got_address - (plt_address + 16);
16473 plt0_entry = elf32_arm_plt0_entry;
16474 put_arm_insn (htab, output_bfd, plt0_entry[0],
16475 splt->contents + 0);
16476 put_arm_insn (htab, output_bfd, plt0_entry[1],
16477 splt->contents + 4);
16478 put_arm_insn (htab, output_bfd, plt0_entry[2],
16479 splt->contents + 8);
16480 put_arm_insn (htab, output_bfd, plt0_entry[3],
16481 splt->contents + 12);
16483 #ifdef FOUR_WORD_PLT
16484 /* The displacement value goes in the otherwise-unused
16485 last word of the second entry. */
16486 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
16488 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
16493 /* UnixWare sets the entsize of .plt to 4, although that doesn't
16494 really seem like the right value. */
16495 if (splt->output_section->owner == output_bfd)
16496 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
16498 if (htab->dt_tlsdesc_plt)
16500 bfd_vma got_address
16501 = sgot->output_section->vma + sgot->output_offset;
16502 bfd_vma gotplt_address = (htab->root.sgot->output_section->vma
16503 + htab->root.sgot->output_offset);
16504 bfd_vma plt_address
16505 = splt->output_section->vma + splt->output_offset;
16507 arm_put_trampoline (htab, output_bfd,
16508 splt->contents + htab->dt_tlsdesc_plt,
16509 dl_tlsdesc_lazy_trampoline, 6);
16511 bfd_put_32 (output_bfd,
16512 gotplt_address + htab->dt_tlsdesc_got
16513 - (plt_address + htab->dt_tlsdesc_plt)
16514 - dl_tlsdesc_lazy_trampoline[6],
16515 splt->contents + htab->dt_tlsdesc_plt + 24);
16516 bfd_put_32 (output_bfd,
16517 got_address - (plt_address + htab->dt_tlsdesc_plt)
16518 - dl_tlsdesc_lazy_trampoline[7],
16519 splt->contents + htab->dt_tlsdesc_plt + 24 + 4);
16522 if (htab->tls_trampoline)
16524 arm_put_trampoline (htab, output_bfd,
16525 splt->contents + htab->tls_trampoline,
16526 tls_trampoline, 3);
16527 #ifdef FOUR_WORD_PLT
16528 bfd_put_32 (output_bfd, 0x00000000,
16529 splt->contents + htab->tls_trampoline + 12);
16533 if (htab->vxworks_p
16534 && !bfd_link_pic (info)
16535 && htab->root.splt->size > 0)
16537 /* Correct the .rel(a).plt.unloaded relocations. They will have
16538 incorrect symbol indexes. */
16542 num_plts = ((htab->root.splt->size - htab->plt_header_size)
16543 / htab->plt_entry_size);
16544 p = htab->srelplt2->contents + RELOC_SIZE (htab);
16546 for (; num_plts; num_plts--)
16548 Elf_Internal_Rela rel;
16550 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
16551 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
16552 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
16553 p += RELOC_SIZE (htab);
16555 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
16556 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
16557 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
16558 p += RELOC_SIZE (htab);
16563 if (htab->nacl_p && htab->root.iplt != NULL && htab->root.iplt->size > 0)
16564 /* NaCl uses a special first entry in .iplt too. */
16565 arm_nacl_put_plt0 (htab, output_bfd, htab->root.iplt, 0);
16567 /* Fill in the first three entries in the global offset table. */
16570 if (sgot->size > 0)
16573 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
16575 bfd_put_32 (output_bfd,
16576 sdyn->output_section->vma + sdyn->output_offset,
16578 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
16579 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
16582 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
16589 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
16591 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
16592 struct elf32_arm_link_hash_table *globals;
16593 struct elf_segment_map *m;
16595 i_ehdrp = elf_elfheader (abfd);
16597 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
16598 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
16600 _bfd_elf_post_process_headers (abfd, link_info);
16601 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
16605 globals = elf32_arm_hash_table (link_info);
16606 if (globals != NULL && globals->byteswap_code)
16607 i_ehdrp->e_flags |= EF_ARM_BE8;
16610 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_VER5
16611 && ((i_ehdrp->e_type == ET_DYN) || (i_ehdrp->e_type == ET_EXEC)))
16613 int abi = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_ABI_VFP_args);
16614 if (abi == AEABI_VFP_args_vfp)
16615 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_HARD;
16617 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_SOFT;
16620 /* Scan segment to set p_flags attribute if it contains only sections with
16621 SHF_ARM_PURECODE flag. */
16622 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
16628 for (j = 0; j < m->count; j++)
16630 if (!(elf_section_flags (m->sections[j]) & SHF_ARM_PURECODE))
16636 m->p_flags_valid = 1;
16641 static enum elf_reloc_type_class
16642 elf32_arm_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
16643 const asection *rel_sec ATTRIBUTE_UNUSED,
16644 const Elf_Internal_Rela *rela)
16646 switch ((int) ELF32_R_TYPE (rela->r_info))
16648 case R_ARM_RELATIVE:
16649 return reloc_class_relative;
16650 case R_ARM_JUMP_SLOT:
16651 return reloc_class_plt;
16653 return reloc_class_copy;
16654 case R_ARM_IRELATIVE:
16655 return reloc_class_ifunc;
16657 return reloc_class_normal;
16662 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
16664 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
16667 /* Return TRUE if this is an unwinding table entry. */
16670 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
16672 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
16673 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
16677 /* Set the type and flags for an ARM section. We do this by
16678 the section name, which is a hack, but ought to work. */
16681 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
16685 name = bfd_get_section_name (abfd, sec);
16687 if (is_arm_elf_unwind_section_name (abfd, name))
16689 hdr->sh_type = SHT_ARM_EXIDX;
16690 hdr->sh_flags |= SHF_LINK_ORDER;
16693 if (sec->flags & SEC_ELF_PURECODE)
16694 hdr->sh_flags |= SHF_ARM_PURECODE;
16699 /* Handle an ARM specific section when reading an object file. This is
16700 called when bfd_section_from_shdr finds a section with an unknown
16704 elf32_arm_section_from_shdr (bfd *abfd,
16705 Elf_Internal_Shdr * hdr,
16709 /* There ought to be a place to keep ELF backend specific flags, but
16710 at the moment there isn't one. We just keep track of the
16711 sections by their name, instead. Fortunately, the ABI gives
16712 names for all the ARM specific sections, so we will probably get
16714 switch (hdr->sh_type)
16716 case SHT_ARM_EXIDX:
16717 case SHT_ARM_PREEMPTMAP:
16718 case SHT_ARM_ATTRIBUTES:
16725 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
16731 static _arm_elf_section_data *
16732 get_arm_elf_section_data (asection * sec)
16734 if (sec && sec->owner && is_arm_elf (sec->owner))
16735 return elf32_arm_section_data (sec);
16743 struct bfd_link_info *info;
16746 int (*func) (void *, const char *, Elf_Internal_Sym *,
16747 asection *, struct elf_link_hash_entry *);
16748 } output_arch_syminfo;
16750 enum map_symbol_type
16758 /* Output a single mapping symbol. */
16761 elf32_arm_output_map_sym (output_arch_syminfo *osi,
16762 enum map_symbol_type type,
16765 static const char *names[3] = {"$a", "$t", "$d"};
16766 Elf_Internal_Sym sym;
16768 sym.st_value = osi->sec->output_section->vma
16769 + osi->sec->output_offset
16773 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
16774 sym.st_shndx = osi->sec_shndx;
16775 sym.st_target_internal = 0;
16776 elf32_arm_section_map_add (osi->sec, names[type][1], offset);
16777 return osi->func (osi->flaginfo, names[type], &sym, osi->sec, NULL) == 1;
16780 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
16781 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
16784 elf32_arm_output_plt_map_1 (output_arch_syminfo *osi,
16785 bfd_boolean is_iplt_entry_p,
16786 union gotplt_union *root_plt,
16787 struct arm_plt_info *arm_plt)
16789 struct elf32_arm_link_hash_table *htab;
16790 bfd_vma addr, plt_header_size;
16792 if (root_plt->offset == (bfd_vma) -1)
16795 htab = elf32_arm_hash_table (osi->info);
16799 if (is_iplt_entry_p)
16801 osi->sec = htab->root.iplt;
16802 plt_header_size = 0;
16806 osi->sec = htab->root.splt;
16807 plt_header_size = htab->plt_header_size;
16809 osi->sec_shndx = (_bfd_elf_section_from_bfd_section
16810 (osi->info->output_bfd, osi->sec->output_section));
16812 addr = root_plt->offset & -2;
16813 if (htab->symbian_p)
16815 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16817 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
16820 else if (htab->vxworks_p)
16822 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16824 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
16826 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
16828 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
16831 else if (htab->nacl_p)
16833 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16836 else if (using_thumb_only (htab))
16838 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
16843 bfd_boolean thumb_stub_p;
16845 thumb_stub_p = elf32_arm_plt_needs_thumb_stub_p (osi->info, arm_plt);
16848 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
16851 #ifdef FOUR_WORD_PLT
16852 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16854 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
16857 /* A three-word PLT with no Thumb thunk contains only Arm code,
16858 so only need to output a mapping symbol for the first PLT entry and
16859 entries with thumb thunks. */
16860 if (thumb_stub_p || addr == plt_header_size)
16862 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16871 /* Output mapping symbols for PLT entries associated with H. */
16874 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
16876 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
16877 struct elf32_arm_link_hash_entry *eh;
16879 if (h->root.type == bfd_link_hash_indirect)
16882 if (h->root.type == bfd_link_hash_warning)
16883 /* When warning symbols are created, they **replace** the "real"
16884 entry in the hash table, thus we never get to see the real
16885 symbol in a hash traversal. So look at it now. */
16886 h = (struct elf_link_hash_entry *) h->root.u.i.link;
16888 eh = (struct elf32_arm_link_hash_entry *) h;
16889 return elf32_arm_output_plt_map_1 (osi, SYMBOL_CALLS_LOCAL (osi->info, h),
16890 &h->plt, &eh->plt);
16893 /* Bind a veneered symbol to its veneer identified by its hash entry
16894 STUB_ENTRY. The veneered location thus loose its symbol. */
16897 arm_stub_claim_sym (struct elf32_arm_stub_hash_entry *stub_entry)
16899 struct elf32_arm_link_hash_entry *hash = stub_entry->h;
16902 hash->root.root.u.def.section = stub_entry->stub_sec;
16903 hash->root.root.u.def.value = stub_entry->stub_offset;
16904 hash->root.size = stub_entry->stub_size;
16907 /* Output a single local symbol for a generated stub. */
16910 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
16911 bfd_vma offset, bfd_vma size)
16913 Elf_Internal_Sym sym;
16915 sym.st_value = osi->sec->output_section->vma
16916 + osi->sec->output_offset
16918 sym.st_size = size;
16920 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
16921 sym.st_shndx = osi->sec_shndx;
16922 sym.st_target_internal = 0;
16923 return osi->func (osi->flaginfo, name, &sym, osi->sec, NULL) == 1;
16927 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
16930 struct elf32_arm_stub_hash_entry *stub_entry;
16931 asection *stub_sec;
16934 output_arch_syminfo *osi;
16935 const insn_sequence *template_sequence;
16936 enum stub_insn_type prev_type;
16939 enum map_symbol_type sym_type;
16941 /* Massage our args to the form they really have. */
16942 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
16943 osi = (output_arch_syminfo *) in_arg;
16945 stub_sec = stub_entry->stub_sec;
16947 /* Ensure this stub is attached to the current section being
16949 if (stub_sec != osi->sec)
16952 addr = (bfd_vma) stub_entry->stub_offset;
16953 template_sequence = stub_entry->stub_template;
16955 if (arm_stub_sym_claimed (stub_entry->stub_type))
16956 arm_stub_claim_sym (stub_entry);
16959 stub_name = stub_entry->output_name;
16960 switch (template_sequence[0].type)
16963 if (!elf32_arm_output_stub_sym (osi, stub_name, addr,
16964 stub_entry->stub_size))
16969 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1,
16970 stub_entry->stub_size))
16979 prev_type = DATA_TYPE;
16981 for (i = 0; i < stub_entry->stub_template_size; i++)
16983 switch (template_sequence[i].type)
16986 sym_type = ARM_MAP_ARM;
16991 sym_type = ARM_MAP_THUMB;
16995 sym_type = ARM_MAP_DATA;
17003 if (template_sequence[i].type != prev_type)
17005 prev_type = template_sequence[i].type;
17006 if (!elf32_arm_output_map_sym (osi, sym_type, addr + size))
17010 switch (template_sequence[i].type)
17034 /* Output mapping symbols for linker generated sections,
17035 and for those data-only sections that do not have a
17039 elf32_arm_output_arch_local_syms (bfd *output_bfd,
17040 struct bfd_link_info *info,
17042 int (*func) (void *, const char *,
17043 Elf_Internal_Sym *,
17045 struct elf_link_hash_entry *))
17047 output_arch_syminfo osi;
17048 struct elf32_arm_link_hash_table *htab;
17050 bfd_size_type size;
17053 htab = elf32_arm_hash_table (info);
17057 check_use_blx (htab);
17059 osi.flaginfo = flaginfo;
17063 /* Add a $d mapping symbol to data-only sections that
17064 don't have any mapping symbol. This may result in (harmless) redundant
17065 mapping symbols. */
17066 for (input_bfd = info->input_bfds;
17068 input_bfd = input_bfd->link.next)
17070 if ((input_bfd->flags & (BFD_LINKER_CREATED | HAS_SYMS)) == HAS_SYMS)
17071 for (osi.sec = input_bfd->sections;
17073 osi.sec = osi.sec->next)
17075 if (osi.sec->output_section != NULL
17076 && ((osi.sec->output_section->flags & (SEC_ALLOC | SEC_CODE))
17078 && (osi.sec->flags & (SEC_HAS_CONTENTS | SEC_LINKER_CREATED))
17079 == SEC_HAS_CONTENTS
17080 && get_arm_elf_section_data (osi.sec) != NULL
17081 && get_arm_elf_section_data (osi.sec)->mapcount == 0
17082 && osi.sec->size > 0
17083 && (osi.sec->flags & SEC_EXCLUDE) == 0)
17085 osi.sec_shndx = _bfd_elf_section_from_bfd_section
17086 (output_bfd, osi.sec->output_section);
17087 if (osi.sec_shndx != (int)SHN_BAD)
17088 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 0);
17093 /* ARM->Thumb glue. */
17094 if (htab->arm_glue_size > 0)
17096 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
17097 ARM2THUMB_GLUE_SECTION_NAME);
17099 osi.sec_shndx = _bfd_elf_section_from_bfd_section
17100 (output_bfd, osi.sec->output_section);
17101 if (bfd_link_pic (info) || htab->root.is_relocatable_executable
17102 || htab->pic_veneer)
17103 size = ARM2THUMB_PIC_GLUE_SIZE;
17104 else if (htab->use_blx)
17105 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
17107 size = ARM2THUMB_STATIC_GLUE_SIZE;
17109 for (offset = 0; offset < htab->arm_glue_size; offset += size)
17111 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
17112 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
17116 /* Thumb->ARM glue. */
17117 if (htab->thumb_glue_size > 0)
17119 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
17120 THUMB2ARM_GLUE_SECTION_NAME);
17122 osi.sec_shndx = _bfd_elf_section_from_bfd_section
17123 (output_bfd, osi.sec->output_section);
17124 size = THUMB2ARM_GLUE_SIZE;
17126 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
17128 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
17129 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
17133 /* ARMv4 BX veneers. */
17134 if (htab->bx_glue_size > 0)
17136 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
17137 ARM_BX_GLUE_SECTION_NAME);
17139 osi.sec_shndx = _bfd_elf_section_from_bfd_section
17140 (output_bfd, osi.sec->output_section);
17142 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
17145 /* Long calls stubs. */
17146 if (htab->stub_bfd && htab->stub_bfd->sections)
17148 asection* stub_sec;
17150 for (stub_sec = htab->stub_bfd->sections;
17152 stub_sec = stub_sec->next)
17154 /* Ignore non-stub sections. */
17155 if (!strstr (stub_sec->name, STUB_SUFFIX))
17158 osi.sec = stub_sec;
17160 osi.sec_shndx = _bfd_elf_section_from_bfd_section
17161 (output_bfd, osi.sec->output_section);
17163 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
17167 /* Finally, output mapping symbols for the PLT. */
17168 if (htab->root.splt && htab->root.splt->size > 0)
17170 osi.sec = htab->root.splt;
17171 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
17172 (output_bfd, osi.sec->output_section));
17174 /* Output mapping symbols for the plt header. SymbianOS does not have a
17176 if (htab->vxworks_p)
17178 /* VxWorks shared libraries have no PLT header. */
17179 if (!bfd_link_pic (info))
17181 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
17183 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
17187 else if (htab->nacl_p)
17189 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
17192 else if (using_thumb_only (htab))
17194 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 0))
17196 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
17198 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 16))
17201 else if (!htab->symbian_p)
17203 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
17205 #ifndef FOUR_WORD_PLT
17206 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
17211 if (htab->nacl_p && htab->root.iplt && htab->root.iplt->size > 0)
17213 /* NaCl uses a special first entry in .iplt too. */
17214 osi.sec = htab->root.iplt;
17215 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
17216 (output_bfd, osi.sec->output_section));
17217 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
17220 if ((htab->root.splt && htab->root.splt->size > 0)
17221 || (htab->root.iplt && htab->root.iplt->size > 0))
17223 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, &osi);
17224 for (input_bfd = info->input_bfds;
17226 input_bfd = input_bfd->link.next)
17228 struct arm_local_iplt_info **local_iplt;
17229 unsigned int i, num_syms;
17231 local_iplt = elf32_arm_local_iplt (input_bfd);
17232 if (local_iplt != NULL)
17234 num_syms = elf_symtab_hdr (input_bfd).sh_info;
17235 for (i = 0; i < num_syms; i++)
17236 if (local_iplt[i] != NULL
17237 && !elf32_arm_output_plt_map_1 (&osi, TRUE,
17238 &local_iplt[i]->root,
17239 &local_iplt[i]->arm))
17244 if (htab->dt_tlsdesc_plt != 0)
17246 /* Mapping symbols for the lazy tls trampoline. */
17247 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->dt_tlsdesc_plt))
17250 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
17251 htab->dt_tlsdesc_plt + 24))
17254 if (htab->tls_trampoline != 0)
17256 /* Mapping symbols for the tls trampoline. */
17257 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->tls_trampoline))
17259 #ifdef FOUR_WORD_PLT
17260 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
17261 htab->tls_trampoline + 12))
17269 /* Filter normal symbols of CMSE entry functions of ABFD to include in
17270 the import library. All SYMCOUNT symbols of ABFD can be examined
17271 from their pointers in SYMS. Pointers of symbols to keep should be
17272 stored continuously at the beginning of that array.
17274 Returns the number of symbols to keep. */
17276 static unsigned int
17277 elf32_arm_filter_cmse_symbols (bfd *abfd ATTRIBUTE_UNUSED,
17278 struct bfd_link_info *info,
17279 asymbol **syms, long symcount)
17283 long src_count, dst_count = 0;
17284 struct elf32_arm_link_hash_table *htab;
17286 htab = elf32_arm_hash_table (info);
17287 if (!htab->stub_bfd || !htab->stub_bfd->sections)
17291 cmse_name = (char *) bfd_malloc (maxnamelen);
17292 for (src_count = 0; src_count < symcount; src_count++)
17294 struct elf32_arm_link_hash_entry *cmse_hash;
17300 sym = syms[src_count];
17301 flags = sym->flags;
17302 name = (char *) bfd_asymbol_name (sym);
17304 if ((flags & BSF_FUNCTION) != BSF_FUNCTION)
17306 if (!(flags & (BSF_GLOBAL | BSF_WEAK)))
17309 namelen = strlen (name) + sizeof (CMSE_PREFIX) + 1;
17310 if (namelen > maxnamelen)
17312 cmse_name = (char *)
17313 bfd_realloc (cmse_name, namelen);
17314 maxnamelen = namelen;
17316 snprintf (cmse_name, maxnamelen, "%s%s", CMSE_PREFIX, name);
17317 cmse_hash = (struct elf32_arm_link_hash_entry *)
17318 elf_link_hash_lookup (&(htab)->root, cmse_name, FALSE, FALSE, TRUE);
17321 || (cmse_hash->root.root.type != bfd_link_hash_defined
17322 && cmse_hash->root.root.type != bfd_link_hash_defweak)
17323 || cmse_hash->root.type != STT_FUNC)
17326 if (!ARM_GET_SYM_CMSE_SPCL (cmse_hash->root.target_internal))
17329 syms[dst_count++] = sym;
17333 syms[dst_count] = NULL;
17338 /* Filter symbols of ABFD to include in the import library. All
17339 SYMCOUNT symbols of ABFD can be examined from their pointers in
17340 SYMS. Pointers of symbols to keep should be stored continuously at
17341 the beginning of that array.
17343 Returns the number of symbols to keep. */
17345 static unsigned int
17346 elf32_arm_filter_implib_symbols (bfd *abfd ATTRIBUTE_UNUSED,
17347 struct bfd_link_info *info,
17348 asymbol **syms, long symcount)
17350 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
17352 if (globals->cmse_implib)
17353 return elf32_arm_filter_cmse_symbols (abfd, info, syms, symcount);
17355 return _bfd_elf_filter_global_symbols (abfd, info, syms, symcount);
17358 /* Allocate target specific section data. */
17361 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
17363 if (!sec->used_by_bfd)
17365 _arm_elf_section_data *sdata;
17366 bfd_size_type amt = sizeof (*sdata);
17368 sdata = (_arm_elf_section_data *) bfd_zalloc (abfd, amt);
17371 sec->used_by_bfd = sdata;
17374 return _bfd_elf_new_section_hook (abfd, sec);
17378 /* Used to order a list of mapping symbols by address. */
17381 elf32_arm_compare_mapping (const void * a, const void * b)
17383 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
17384 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
17386 if (amap->vma > bmap->vma)
17388 else if (amap->vma < bmap->vma)
17390 else if (amap->type > bmap->type)
17391 /* Ensure results do not depend on the host qsort for objects with
17392 multiple mapping symbols at the same address by sorting on type
17395 else if (amap->type < bmap->type)
17401 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
17403 static unsigned long
17404 offset_prel31 (unsigned long addr, bfd_vma offset)
17406 return (addr & ~0x7ffffffful) | ((addr + offset) & 0x7ffffffful);
17409 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
17413 copy_exidx_entry (bfd *output_bfd, bfd_byte *to, bfd_byte *from, bfd_vma offset)
17415 unsigned long first_word = bfd_get_32 (output_bfd, from);
17416 unsigned long second_word = bfd_get_32 (output_bfd, from + 4);
17418 /* High bit of first word is supposed to be zero. */
17419 if ((first_word & 0x80000000ul) == 0)
17420 first_word = offset_prel31 (first_word, offset);
17422 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
17423 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
17424 if ((second_word != 0x1) && ((second_word & 0x80000000ul) == 0))
17425 second_word = offset_prel31 (second_word, offset);
17427 bfd_put_32 (output_bfd, first_word, to);
17428 bfd_put_32 (output_bfd, second_word, to + 4);
17431 /* Data for make_branch_to_a8_stub(). */
17433 struct a8_branch_to_stub_data
17435 asection *writing_section;
17436 bfd_byte *contents;
17440 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
17441 places for a particular section. */
17444 make_branch_to_a8_stub (struct bfd_hash_entry *gen_entry,
17447 struct elf32_arm_stub_hash_entry *stub_entry;
17448 struct a8_branch_to_stub_data *data;
17449 bfd_byte *contents;
17450 unsigned long branch_insn;
17451 bfd_vma veneered_insn_loc, veneer_entry_loc;
17452 bfd_signed_vma branch_offset;
17456 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
17457 data = (struct a8_branch_to_stub_data *) in_arg;
17459 if (stub_entry->target_section != data->writing_section
17460 || stub_entry->stub_type < arm_stub_a8_veneer_lwm)
17463 contents = data->contents;
17465 /* We use target_section as Cortex-A8 erratum workaround stubs are only
17466 generated when both source and target are in the same section. */
17467 veneered_insn_loc = stub_entry->target_section->output_section->vma
17468 + stub_entry->target_section->output_offset
17469 + stub_entry->source_value;
17471 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
17472 + stub_entry->stub_sec->output_offset
17473 + stub_entry->stub_offset;
17475 if (stub_entry->stub_type == arm_stub_a8_veneer_blx)
17476 veneered_insn_loc &= ~3u;
17478 branch_offset = veneer_entry_loc - veneered_insn_loc - 4;
17480 abfd = stub_entry->target_section->owner;
17481 loc = stub_entry->source_value;
17483 /* We attempt to avoid this condition by setting stubs_always_after_branch
17484 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
17485 This check is just to be on the safe side... */
17486 if ((veneered_insn_loc & ~0xfff) == (veneer_entry_loc & ~0xfff))
17488 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub is "
17489 "allocated in unsafe location"), abfd);
17493 switch (stub_entry->stub_type)
17495 case arm_stub_a8_veneer_b:
17496 case arm_stub_a8_veneer_b_cond:
17497 branch_insn = 0xf0009000;
17500 case arm_stub_a8_veneer_blx:
17501 branch_insn = 0xf000e800;
17504 case arm_stub_a8_veneer_bl:
17506 unsigned int i1, j1, i2, j2, s;
17508 branch_insn = 0xf000d000;
17511 if (branch_offset < -16777216 || branch_offset > 16777214)
17513 /* There's not much we can do apart from complain if this
17515 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub out "
17516 "of range (input file too large)"), abfd);
17520 /* i1 = not(j1 eor s), so:
17522 j1 = (not i1) eor s. */
17524 branch_insn |= (branch_offset >> 1) & 0x7ff;
17525 branch_insn |= ((branch_offset >> 12) & 0x3ff) << 16;
17526 i2 = (branch_offset >> 22) & 1;
17527 i1 = (branch_offset >> 23) & 1;
17528 s = (branch_offset >> 24) & 1;
17531 branch_insn |= j2 << 11;
17532 branch_insn |= j1 << 13;
17533 branch_insn |= s << 26;
17542 bfd_put_16 (abfd, (branch_insn >> 16) & 0xffff, &contents[loc]);
17543 bfd_put_16 (abfd, branch_insn & 0xffff, &contents[loc + 2]);
17548 /* Beginning of stm32l4xx work-around. */
17550 /* Functions encoding instructions necessary for the emission of the
17551 fix-stm32l4xx-629360.
17552 Encoding is extracted from the
17553 ARM (C) Architecture Reference Manual
17554 ARMv7-A and ARMv7-R edition
17555 ARM DDI 0406C.b (ID072512). */
17557 static inline bfd_vma
17558 create_instruction_branch_absolute (int branch_offset)
17560 /* A8.8.18 B (A8-334)
17561 B target_address (Encoding T4). */
17562 /* 1111 - 0Sii - iiii - iiii - 10J1 - Jiii - iiii - iiii. */
17563 /* jump offset is: S:I1:I2:imm10:imm11:0. */
17564 /* with : I1 = NOT (J1 EOR S) I2 = NOT (J2 EOR S). */
17566 int s = ((branch_offset & 0x1000000) >> 24);
17567 int j1 = s ^ !((branch_offset & 0x800000) >> 23);
17568 int j2 = s ^ !((branch_offset & 0x400000) >> 22);
17570 if (branch_offset < -(1 << 24) || branch_offset >= (1 << 24))
17571 BFD_ASSERT (0 && "Error: branch out of range. Cannot create branch.");
17573 bfd_vma patched_inst = 0xf0009000
17575 | (((unsigned long) (branch_offset) >> 12) & 0x3ff) << 16 /* imm10. */
17576 | j1 << 13 /* J1. */
17577 | j2 << 11 /* J2. */
17578 | (((unsigned long) (branch_offset) >> 1) & 0x7ff); /* imm11. */
17580 return patched_inst;
17583 static inline bfd_vma
17584 create_instruction_ldmia (int base_reg, int wback, int reg_mask)
17586 /* A8.8.57 LDM/LDMIA/LDMFD (A8-396)
17587 LDMIA Rn!, {Ra, Rb, Rc, ...} (Encoding T2). */
17588 bfd_vma patched_inst = 0xe8900000
17589 | (/*W=*/wback << 21)
17591 | (reg_mask & 0x0000ffff);
17593 return patched_inst;
17596 static inline bfd_vma
17597 create_instruction_ldmdb (int base_reg, int wback, int reg_mask)
17599 /* A8.8.60 LDMDB/LDMEA (A8-402)
17600 LDMDB Rn!, {Ra, Rb, Rc, ...} (Encoding T1). */
17601 bfd_vma patched_inst = 0xe9100000
17602 | (/*W=*/wback << 21)
17604 | (reg_mask & 0x0000ffff);
17606 return patched_inst;
17609 static inline bfd_vma
17610 create_instruction_mov (int target_reg, int source_reg)
17612 /* A8.8.103 MOV (register) (A8-486)
17613 MOV Rd, Rm (Encoding T1). */
17614 bfd_vma patched_inst = 0x4600
17615 | (target_reg & 0x7)
17616 | ((target_reg & 0x8) >> 3) << 7
17617 | (source_reg << 3);
17619 return patched_inst;
17622 static inline bfd_vma
17623 create_instruction_sub (int target_reg, int source_reg, int value)
17625 /* A8.8.221 SUB (immediate) (A8-708)
17626 SUB Rd, Rn, #value (Encoding T3). */
17627 bfd_vma patched_inst = 0xf1a00000
17628 | (target_reg << 8)
17629 | (source_reg << 16)
17631 | ((value & 0x800) >> 11) << 26
17632 | ((value & 0x700) >> 8) << 12
17635 return patched_inst;
17638 static inline bfd_vma
17639 create_instruction_vldmia (int base_reg, int is_dp, int wback, int num_words,
17642 /* A8.8.332 VLDM (A8-922)
17643 VLMD{MODE} Rn{!}, {list} (Encoding T1 or T2). */
17644 bfd_vma patched_inst = (is_dp ? 0xec900b00 : 0xec900a00)
17645 | (/*W=*/wback << 21)
17647 | (num_words & 0x000000ff)
17648 | (((unsigned)first_reg >> 1) & 0x0000000f) << 12
17649 | (first_reg & 0x00000001) << 22;
17651 return patched_inst;
17654 static inline bfd_vma
17655 create_instruction_vldmdb (int base_reg, int is_dp, int num_words,
17658 /* A8.8.332 VLDM (A8-922)
17659 VLMD{MODE} Rn!, {} (Encoding T1 or T2). */
17660 bfd_vma patched_inst = (is_dp ? 0xed300b00 : 0xed300a00)
17662 | (num_words & 0x000000ff)
17663 | (((unsigned)first_reg >>1 ) & 0x0000000f) << 12
17664 | (first_reg & 0x00000001) << 22;
17666 return patched_inst;
17669 static inline bfd_vma
17670 create_instruction_udf_w (int value)
17672 /* A8.8.247 UDF (A8-758)
17673 Undefined (Encoding T2). */
17674 bfd_vma patched_inst = 0xf7f0a000
17675 | (value & 0x00000fff)
17676 | (value & 0x000f0000) << 16;
17678 return patched_inst;
17681 static inline bfd_vma
17682 create_instruction_udf (int value)
17684 /* A8.8.247 UDF (A8-758)
17685 Undefined (Encoding T1). */
17686 bfd_vma patched_inst = 0xde00
17689 return patched_inst;
17692 /* Functions writing an instruction in memory, returning the next
17693 memory position to write to. */
17695 static inline bfd_byte *
17696 push_thumb2_insn32 (struct elf32_arm_link_hash_table * htab,
17697 bfd * output_bfd, bfd_byte *pt, insn32 insn)
17699 put_thumb2_insn (htab, output_bfd, insn, pt);
17703 static inline bfd_byte *
17704 push_thumb2_insn16 (struct elf32_arm_link_hash_table * htab,
17705 bfd * output_bfd, bfd_byte *pt, insn32 insn)
17707 put_thumb_insn (htab, output_bfd, insn, pt);
17711 /* Function filling up a region in memory with T1 and T2 UDFs taking
17712 care of alignment. */
17715 stm32l4xx_fill_stub_udf (struct elf32_arm_link_hash_table * htab,
17717 const bfd_byte * const base_stub_contents,
17718 bfd_byte * const from_stub_contents,
17719 const bfd_byte * const end_stub_contents)
17721 bfd_byte *current_stub_contents = from_stub_contents;
17723 /* Fill the remaining of the stub with deterministic contents : UDF
17725 Check if realignment is needed on modulo 4 frontier using T1, to
17727 if ((current_stub_contents < end_stub_contents)
17728 && !((current_stub_contents - base_stub_contents) % 2)
17729 && ((current_stub_contents - base_stub_contents) % 4))
17730 current_stub_contents =
17731 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
17732 create_instruction_udf (0));
17734 for (; current_stub_contents < end_stub_contents;)
17735 current_stub_contents =
17736 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17737 create_instruction_udf_w (0));
17739 return current_stub_contents;
17742 /* Functions writing the stream of instructions equivalent to the
17743 derived sequence for ldmia, ldmdb, vldm respectively. */
17746 stm32l4xx_create_replacing_stub_ldmia (struct elf32_arm_link_hash_table * htab,
17748 const insn32 initial_insn,
17749 const bfd_byte *const initial_insn_addr,
17750 bfd_byte *const base_stub_contents)
17752 int wback = (initial_insn & 0x00200000) >> 21;
17753 int ri, rn = (initial_insn & 0x000F0000) >> 16;
17754 int insn_all_registers = initial_insn & 0x0000ffff;
17755 int insn_low_registers, insn_high_registers;
17756 int usable_register_mask;
17757 int nb_registers = popcount (insn_all_registers);
17758 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
17759 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
17760 bfd_byte *current_stub_contents = base_stub_contents;
17762 BFD_ASSERT (is_thumb2_ldmia (initial_insn));
17764 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
17765 smaller than 8 registers load sequences that do not cause the
17767 if (nb_registers <= 8)
17769 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
17770 current_stub_contents =
17771 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17774 /* B initial_insn_addr+4. */
17776 current_stub_contents =
17777 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17778 create_instruction_branch_absolute
17779 (initial_insn_addr - current_stub_contents));
17782 /* Fill the remaining of the stub with deterministic contents. */
17783 current_stub_contents =
17784 stm32l4xx_fill_stub_udf (htab, output_bfd,
17785 base_stub_contents, current_stub_contents,
17786 base_stub_contents +
17787 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
17792 /* - reg_list[13] == 0. */
17793 BFD_ASSERT ((insn_all_registers & (1 << 13))==0);
17795 /* - reg_list[14] & reg_list[15] != 1. */
17796 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
17798 /* - if (wback==1) reg_list[rn] == 0. */
17799 BFD_ASSERT (!wback || !restore_rn);
17801 /* - nb_registers > 8. */
17802 BFD_ASSERT (popcount (insn_all_registers) > 8);
17804 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
17806 /* In the following algorithm, we split this wide LDM using 2 LDM insns:
17807 - One with the 7 lowest registers (register mask 0x007F)
17808 This LDM will finally contain between 2 and 7 registers
17809 - One with the 7 highest registers (register mask 0xDF80)
17810 This ldm will finally contain between 2 and 7 registers. */
17811 insn_low_registers = insn_all_registers & 0x007F;
17812 insn_high_registers = insn_all_registers & 0xDF80;
17814 /* A spare register may be needed during this veneer to temporarily
17815 handle the base register. This register will be restored with the
17816 last LDM operation.
17817 The usable register may be any general purpose register (that
17818 excludes PC, SP, LR : register mask is 0x1FFF). */
17819 usable_register_mask = 0x1FFF;
17821 /* Generate the stub function. */
17824 /* LDMIA Rn!, {R-low-register-list} : (Encoding T2). */
17825 current_stub_contents =
17826 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17827 create_instruction_ldmia
17828 (rn, /*wback=*/1, insn_low_registers));
17830 /* LDMIA Rn!, {R-high-register-list} : (Encoding T2). */
17831 current_stub_contents =
17832 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17833 create_instruction_ldmia
17834 (rn, /*wback=*/1, insn_high_registers));
17837 /* B initial_insn_addr+4. */
17838 current_stub_contents =
17839 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17840 create_instruction_branch_absolute
17841 (initial_insn_addr - current_stub_contents));
17844 else /* if (!wback). */
17848 /* If Rn is not part of the high-register-list, move it there. */
17849 if (!(insn_high_registers & (1 << rn)))
17851 /* Choose a Ri in the high-register-list that will be restored. */
17852 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
17855 current_stub_contents =
17856 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
17857 create_instruction_mov (ri, rn));
17860 /* LDMIA Ri!, {R-low-register-list} : (Encoding T2). */
17861 current_stub_contents =
17862 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17863 create_instruction_ldmia
17864 (ri, /*wback=*/1, insn_low_registers));
17866 /* LDMIA Ri, {R-high-register-list} : (Encoding T2). */
17867 current_stub_contents =
17868 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17869 create_instruction_ldmia
17870 (ri, /*wback=*/0, insn_high_registers));
17874 /* B initial_insn_addr+4. */
17875 current_stub_contents =
17876 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17877 create_instruction_branch_absolute
17878 (initial_insn_addr - current_stub_contents));
17882 /* Fill the remaining of the stub with deterministic contents. */
17883 current_stub_contents =
17884 stm32l4xx_fill_stub_udf (htab, output_bfd,
17885 base_stub_contents, current_stub_contents,
17886 base_stub_contents +
17887 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
17891 stm32l4xx_create_replacing_stub_ldmdb (struct elf32_arm_link_hash_table * htab,
17893 const insn32 initial_insn,
17894 const bfd_byte *const initial_insn_addr,
17895 bfd_byte *const base_stub_contents)
17897 int wback = (initial_insn & 0x00200000) >> 21;
17898 int ri, rn = (initial_insn & 0x000f0000) >> 16;
17899 int insn_all_registers = initial_insn & 0x0000ffff;
17900 int insn_low_registers, insn_high_registers;
17901 int usable_register_mask;
17902 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
17903 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
17904 int nb_registers = popcount (insn_all_registers);
17905 bfd_byte *current_stub_contents = base_stub_contents;
17907 BFD_ASSERT (is_thumb2_ldmdb (initial_insn));
17909 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
17910 smaller than 8 registers load sequences that do not cause the
17912 if (nb_registers <= 8)
17914 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
17915 current_stub_contents =
17916 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17919 /* B initial_insn_addr+4. */
17920 current_stub_contents =
17921 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17922 create_instruction_branch_absolute
17923 (initial_insn_addr - current_stub_contents));
17925 /* Fill the remaining of the stub with deterministic contents. */
17926 current_stub_contents =
17927 stm32l4xx_fill_stub_udf (htab, output_bfd,
17928 base_stub_contents, current_stub_contents,
17929 base_stub_contents +
17930 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
17935 /* - reg_list[13] == 0. */
17936 BFD_ASSERT ((insn_all_registers & (1 << 13)) == 0);
17938 /* - reg_list[14] & reg_list[15] != 1. */
17939 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
17941 /* - if (wback==1) reg_list[rn] == 0. */
17942 BFD_ASSERT (!wback || !restore_rn);
17944 /* - nb_registers > 8. */
17945 BFD_ASSERT (popcount (insn_all_registers) > 8);
17947 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
17949 /* In the following algorithm, we split this wide LDM using 2 LDM insn:
17950 - One with the 7 lowest registers (register mask 0x007F)
17951 This LDM will finally contain between 2 and 7 registers
17952 - One with the 7 highest registers (register mask 0xDF80)
17953 This ldm will finally contain between 2 and 7 registers. */
17954 insn_low_registers = insn_all_registers & 0x007F;
17955 insn_high_registers = insn_all_registers & 0xDF80;
17957 /* A spare register may be needed during this veneer to temporarily
17958 handle the base register. This register will be restored with
17959 the last LDM operation.
17960 The usable register may be any general purpose register (that excludes
17961 PC, SP, LR : register mask is 0x1FFF). */
17962 usable_register_mask = 0x1FFF;
17964 /* Generate the stub function. */
17965 if (!wback && !restore_pc && !restore_rn)
17967 /* Choose a Ri in the low-register-list that will be restored. */
17968 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
17971 current_stub_contents =
17972 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
17973 create_instruction_mov (ri, rn));
17975 /* LDMDB Ri!, {R-high-register-list}. */
17976 current_stub_contents =
17977 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17978 create_instruction_ldmdb
17979 (ri, /*wback=*/1, insn_high_registers));
17981 /* LDMDB Ri, {R-low-register-list}. */
17982 current_stub_contents =
17983 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17984 create_instruction_ldmdb
17985 (ri, /*wback=*/0, insn_low_registers));
17987 /* B initial_insn_addr+4. */
17988 current_stub_contents =
17989 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17990 create_instruction_branch_absolute
17991 (initial_insn_addr - current_stub_contents));
17993 else if (wback && !restore_pc && !restore_rn)
17995 /* LDMDB Rn!, {R-high-register-list}. */
17996 current_stub_contents =
17997 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17998 create_instruction_ldmdb
17999 (rn, /*wback=*/1, insn_high_registers));
18001 /* LDMDB Rn!, {R-low-register-list}. */
18002 current_stub_contents =
18003 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18004 create_instruction_ldmdb
18005 (rn, /*wback=*/1, insn_low_registers));
18007 /* B initial_insn_addr+4. */
18008 current_stub_contents =
18009 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18010 create_instruction_branch_absolute
18011 (initial_insn_addr - current_stub_contents));
18013 else if (!wback && restore_pc && !restore_rn)
18015 /* Choose a Ri in the high-register-list that will be restored. */
18016 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
18018 /* SUB Ri, Rn, #(4*nb_registers). */
18019 current_stub_contents =
18020 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18021 create_instruction_sub (ri, rn, (4 * nb_registers)));
18023 /* LDMIA Ri!, {R-low-register-list}. */
18024 current_stub_contents =
18025 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18026 create_instruction_ldmia
18027 (ri, /*wback=*/1, insn_low_registers));
18029 /* LDMIA Ri, {R-high-register-list}. */
18030 current_stub_contents =
18031 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18032 create_instruction_ldmia
18033 (ri, /*wback=*/0, insn_high_registers));
18035 else if (wback && restore_pc && !restore_rn)
18037 /* Choose a Ri in the high-register-list that will be restored. */
18038 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
18040 /* SUB Rn, Rn, #(4*nb_registers) */
18041 current_stub_contents =
18042 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18043 create_instruction_sub (rn, rn, (4 * nb_registers)));
18046 current_stub_contents =
18047 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
18048 create_instruction_mov (ri, rn));
18050 /* LDMIA Ri!, {R-low-register-list}. */
18051 current_stub_contents =
18052 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18053 create_instruction_ldmia
18054 (ri, /*wback=*/1, insn_low_registers));
18056 /* LDMIA Ri, {R-high-register-list}. */
18057 current_stub_contents =
18058 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18059 create_instruction_ldmia
18060 (ri, /*wback=*/0, insn_high_registers));
18062 else if (!wback && !restore_pc && restore_rn)
18065 if (!(insn_low_registers & (1 << rn)))
18067 /* Choose a Ri in the low-register-list that will be restored. */
18068 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
18071 current_stub_contents =
18072 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
18073 create_instruction_mov (ri, rn));
18076 /* LDMDB Ri!, {R-high-register-list}. */
18077 current_stub_contents =
18078 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18079 create_instruction_ldmdb
18080 (ri, /*wback=*/1, insn_high_registers));
18082 /* LDMDB Ri, {R-low-register-list}. */
18083 current_stub_contents =
18084 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18085 create_instruction_ldmdb
18086 (ri, /*wback=*/0, insn_low_registers));
18088 /* B initial_insn_addr+4. */
18089 current_stub_contents =
18090 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18091 create_instruction_branch_absolute
18092 (initial_insn_addr - current_stub_contents));
18094 else if (!wback && restore_pc && restore_rn)
18097 if (!(insn_high_registers & (1 << rn)))
18099 /* Choose a Ri in the high-register-list that will be restored. */
18100 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
18103 /* SUB Ri, Rn, #(4*nb_registers). */
18104 current_stub_contents =
18105 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18106 create_instruction_sub (ri, rn, (4 * nb_registers)));
18108 /* LDMIA Ri!, {R-low-register-list}. */
18109 current_stub_contents =
18110 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18111 create_instruction_ldmia
18112 (ri, /*wback=*/1, insn_low_registers));
18114 /* LDMIA Ri, {R-high-register-list}. */
18115 current_stub_contents =
18116 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18117 create_instruction_ldmia
18118 (ri, /*wback=*/0, insn_high_registers));
18120 else if (wback && restore_rn)
18122 /* The assembler should not have accepted to encode this. */
18123 BFD_ASSERT (0 && "Cannot patch an instruction that has an "
18124 "undefined behavior.\n");
18127 /* Fill the remaining of the stub with deterministic contents. */
18128 current_stub_contents =
18129 stm32l4xx_fill_stub_udf (htab, output_bfd,
18130 base_stub_contents, current_stub_contents,
18131 base_stub_contents +
18132 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
18137 stm32l4xx_create_replacing_stub_vldm (struct elf32_arm_link_hash_table * htab,
18139 const insn32 initial_insn,
18140 const bfd_byte *const initial_insn_addr,
18141 bfd_byte *const base_stub_contents)
18143 int num_words = ((unsigned int) initial_insn << 24) >> 24;
18144 bfd_byte *current_stub_contents = base_stub_contents;
18146 BFD_ASSERT (is_thumb2_vldm (initial_insn));
18148 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
18149 smaller than 8 words load sequences that do not cause the
18151 if (num_words <= 8)
18153 /* Untouched instruction. */
18154 current_stub_contents =
18155 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18158 /* B initial_insn_addr+4. */
18159 current_stub_contents =
18160 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18161 create_instruction_branch_absolute
18162 (initial_insn_addr - current_stub_contents));
18166 bfd_boolean is_dp = /* DP encoding. */
18167 (initial_insn & 0xfe100f00) == 0xec100b00;
18168 bfd_boolean is_ia_nobang = /* (IA without !). */
18169 (((initial_insn << 7) >> 28) & 0xd) == 0x4;
18170 bfd_boolean is_ia_bang = /* (IA with !) - includes VPOP. */
18171 (((initial_insn << 7) >> 28) & 0xd) == 0x5;
18172 bfd_boolean is_db_bang = /* (DB with !). */
18173 (((initial_insn << 7) >> 28) & 0xd) == 0x9;
18174 int base_reg = ((unsigned int) initial_insn << 12) >> 28;
18175 /* d = UInt (Vd:D);. */
18176 int first_reg = ((((unsigned int) initial_insn << 16) >> 28) << 1)
18177 | (((unsigned int)initial_insn << 9) >> 31);
18179 /* Compute the number of 8-words chunks needed to split. */
18180 int chunks = (num_words % 8) ? (num_words / 8 + 1) : (num_words / 8);
18183 /* The test coverage has been done assuming the following
18184 hypothesis that exactly one of the previous is_ predicates is
18186 BFD_ASSERT ( (is_ia_nobang ^ is_ia_bang ^ is_db_bang)
18187 && !(is_ia_nobang & is_ia_bang & is_db_bang));
18189 /* We treat the cutting of the words in one pass for all
18190 cases, then we emit the adjustments:
18193 -> vldm rx!, {8_words_or_less} for each needed 8_word
18194 -> sub rx, rx, #size (list)
18197 -> vldm rx!, {8_words_or_less} for each needed 8_word
18198 This also handles vpop instruction (when rx is sp)
18201 -> vldmb rx!, {8_words_or_less} for each needed 8_word. */
18202 for (chunk = 0; chunk < chunks; ++chunk)
18204 bfd_vma new_insn = 0;
18206 if (is_ia_nobang || is_ia_bang)
18208 new_insn = create_instruction_vldmia
18212 chunks - (chunk + 1) ?
18213 8 : num_words - chunk * 8,
18214 first_reg + chunk * 8);
18216 else if (is_db_bang)
18218 new_insn = create_instruction_vldmdb
18221 chunks - (chunk + 1) ?
18222 8 : num_words - chunk * 8,
18223 first_reg + chunk * 8);
18227 current_stub_contents =
18228 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18232 /* Only this case requires the base register compensation
18236 current_stub_contents =
18237 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18238 create_instruction_sub
18239 (base_reg, base_reg, 4*num_words));
18242 /* B initial_insn_addr+4. */
18243 current_stub_contents =
18244 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18245 create_instruction_branch_absolute
18246 (initial_insn_addr - current_stub_contents));
18249 /* Fill the remaining of the stub with deterministic contents. */
18250 current_stub_contents =
18251 stm32l4xx_fill_stub_udf (htab, output_bfd,
18252 base_stub_contents, current_stub_contents,
18253 base_stub_contents +
18254 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
18258 stm32l4xx_create_replacing_stub (struct elf32_arm_link_hash_table * htab,
18260 const insn32 wrong_insn,
18261 const bfd_byte *const wrong_insn_addr,
18262 bfd_byte *const stub_contents)
18264 if (is_thumb2_ldmia (wrong_insn))
18265 stm32l4xx_create_replacing_stub_ldmia (htab, output_bfd,
18266 wrong_insn, wrong_insn_addr,
18268 else if (is_thumb2_ldmdb (wrong_insn))
18269 stm32l4xx_create_replacing_stub_ldmdb (htab, output_bfd,
18270 wrong_insn, wrong_insn_addr,
18272 else if (is_thumb2_vldm (wrong_insn))
18273 stm32l4xx_create_replacing_stub_vldm (htab, output_bfd,
18274 wrong_insn, wrong_insn_addr,
18278 /* End of stm32l4xx work-around. */
18281 /* Do code byteswapping. Return FALSE afterwards so that the section is
18282 written out as normal. */
18285 elf32_arm_write_section (bfd *output_bfd,
18286 struct bfd_link_info *link_info,
18288 bfd_byte *contents)
18290 unsigned int mapcount, errcount;
18291 _arm_elf_section_data *arm_data;
18292 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
18293 elf32_arm_section_map *map;
18294 elf32_vfp11_erratum_list *errnode;
18295 elf32_stm32l4xx_erratum_list *stm32l4xx_errnode;
18298 bfd_vma offset = sec->output_section->vma + sec->output_offset;
18302 if (globals == NULL)
18305 /* If this section has not been allocated an _arm_elf_section_data
18306 structure then we cannot record anything. */
18307 arm_data = get_arm_elf_section_data (sec);
18308 if (arm_data == NULL)
18311 mapcount = arm_data->mapcount;
18312 map = arm_data->map;
18313 errcount = arm_data->erratumcount;
18317 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
18319 for (errnode = arm_data->erratumlist; errnode != 0;
18320 errnode = errnode->next)
18322 bfd_vma target = errnode->vma - offset;
18324 switch (errnode->type)
18326 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
18328 bfd_vma branch_to_veneer;
18329 /* Original condition code of instruction, plus bit mask for
18330 ARM B instruction. */
18331 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
18334 /* The instruction is before the label. */
18337 /* Above offset included in -4 below. */
18338 branch_to_veneer = errnode->u.b.veneer->vma
18339 - errnode->vma - 4;
18341 if ((signed) branch_to_veneer < -(1 << 25)
18342 || (signed) branch_to_veneer >= (1 << 25))
18343 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
18344 "range"), output_bfd);
18346 insn |= (branch_to_veneer >> 2) & 0xffffff;
18347 contents[endianflip ^ target] = insn & 0xff;
18348 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
18349 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
18350 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
18354 case VFP11_ERRATUM_ARM_VENEER:
18356 bfd_vma branch_from_veneer;
18359 /* Take size of veneer into account. */
18360 branch_from_veneer = errnode->u.v.branch->vma
18361 - errnode->vma - 12;
18363 if ((signed) branch_from_veneer < -(1 << 25)
18364 || (signed) branch_from_veneer >= (1 << 25))
18365 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
18366 "range"), output_bfd);
18368 /* Original instruction. */
18369 insn = errnode->u.v.branch->u.b.vfp_insn;
18370 contents[endianflip ^ target] = insn & 0xff;
18371 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
18372 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
18373 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
18375 /* Branch back to insn after original insn. */
18376 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
18377 contents[endianflip ^ (target + 4)] = insn & 0xff;
18378 contents[endianflip ^ (target + 5)] = (insn >> 8) & 0xff;
18379 contents[endianflip ^ (target + 6)] = (insn >> 16) & 0xff;
18380 contents[endianflip ^ (target + 7)] = (insn >> 24) & 0xff;
18390 if (arm_data->stm32l4xx_erratumcount != 0)
18392 for (stm32l4xx_errnode = arm_data->stm32l4xx_erratumlist;
18393 stm32l4xx_errnode != 0;
18394 stm32l4xx_errnode = stm32l4xx_errnode->next)
18396 bfd_vma target = stm32l4xx_errnode->vma - offset;
18398 switch (stm32l4xx_errnode->type)
18400 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
18403 bfd_vma branch_to_veneer =
18404 stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma;
18406 if ((signed) branch_to_veneer < -(1 << 24)
18407 || (signed) branch_to_veneer >= (1 << 24))
18409 bfd_vma out_of_range =
18410 ((signed) branch_to_veneer < -(1 << 24)) ?
18411 - branch_to_veneer - (1 << 24) :
18412 ((signed) branch_to_veneer >= (1 << 24)) ?
18413 branch_to_veneer - (1 << 24) : 0;
18415 (*_bfd_error_handler)
18416 (_("%B(%#x): error: Cannot create STM32L4XX veneer. "
18417 "Jump out of range by %ld bytes. "
18418 "Cannot encode branch instruction. "),
18420 (long) (stm32l4xx_errnode->vma - 4),
18425 insn = create_instruction_branch_absolute
18426 (stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma);
18428 /* The instruction is before the label. */
18431 put_thumb2_insn (globals, output_bfd,
18432 (bfd_vma) insn, contents + target);
18436 case STM32L4XX_ERRATUM_VENEER:
18439 bfd_byte * veneer_r;
18442 veneer = contents + target;
18444 + stm32l4xx_errnode->u.b.veneer->vma
18445 - stm32l4xx_errnode->vma - 4;
18447 if ((signed) (veneer_r - veneer -
18448 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE >
18449 STM32L4XX_ERRATUM_LDM_VENEER_SIZE ?
18450 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE :
18451 STM32L4XX_ERRATUM_LDM_VENEER_SIZE) < -(1 << 24)
18452 || (signed) (veneer_r - veneer) >= (1 << 24))
18454 (*_bfd_error_handler) (_("%B: error: Cannot create STM32L4XX "
18455 "veneer."), output_bfd);
18459 /* Original instruction. */
18460 insn = stm32l4xx_errnode->u.v.branch->u.b.insn;
18462 stm32l4xx_create_replacing_stub
18463 (globals, output_bfd, insn, (void*)veneer_r, (void*)veneer);
18473 if (arm_data->elf.this_hdr.sh_type == SHT_ARM_EXIDX)
18475 arm_unwind_table_edit *edit_node
18476 = arm_data->u.exidx.unwind_edit_list;
18477 /* Now, sec->size is the size of the section we will write. The original
18478 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
18479 markers) was sec->rawsize. (This isn't the case if we perform no
18480 edits, then rawsize will be zero and we should use size). */
18481 bfd_byte *edited_contents = (bfd_byte *) bfd_malloc (sec->size);
18482 unsigned int input_size = sec->rawsize ? sec->rawsize : sec->size;
18483 unsigned int in_index, out_index;
18484 bfd_vma add_to_offsets = 0;
18486 for (in_index = 0, out_index = 0; in_index * 8 < input_size || edit_node;)
18490 unsigned int edit_index = edit_node->index;
18492 if (in_index < edit_index && in_index * 8 < input_size)
18494 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
18495 contents + in_index * 8, add_to_offsets);
18499 else if (in_index == edit_index
18500 || (in_index * 8 >= input_size
18501 && edit_index == UINT_MAX))
18503 switch (edit_node->type)
18505 case DELETE_EXIDX_ENTRY:
18507 add_to_offsets += 8;
18510 case INSERT_EXIDX_CANTUNWIND_AT_END:
18512 asection *text_sec = edit_node->linked_section;
18513 bfd_vma text_offset = text_sec->output_section->vma
18514 + text_sec->output_offset
18516 bfd_vma exidx_offset = offset + out_index * 8;
18517 unsigned long prel31_offset;
18519 /* Note: this is meant to be equivalent to an
18520 R_ARM_PREL31 relocation. These synthetic
18521 EXIDX_CANTUNWIND markers are not relocated by the
18522 usual BFD method. */
18523 prel31_offset = (text_offset - exidx_offset)
18525 if (bfd_link_relocatable (link_info))
18527 /* Here relocation for new EXIDX_CANTUNWIND is
18528 created, so there is no need to
18529 adjust offset by hand. */
18530 prel31_offset = text_sec->output_offset
18534 /* First address we can't unwind. */
18535 bfd_put_32 (output_bfd, prel31_offset,
18536 &edited_contents[out_index * 8]);
18538 /* Code for EXIDX_CANTUNWIND. */
18539 bfd_put_32 (output_bfd, 0x1,
18540 &edited_contents[out_index * 8 + 4]);
18543 add_to_offsets -= 8;
18548 edit_node = edit_node->next;
18553 /* No more edits, copy remaining entries verbatim. */
18554 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
18555 contents + in_index * 8, add_to_offsets);
18561 if (!(sec->flags & SEC_EXCLUDE) && !(sec->flags & SEC_NEVER_LOAD))
18562 bfd_set_section_contents (output_bfd, sec->output_section,
18564 (file_ptr) sec->output_offset, sec->size);
18569 /* Fix code to point to Cortex-A8 erratum stubs. */
18570 if (globals->fix_cortex_a8)
18572 struct a8_branch_to_stub_data data;
18574 data.writing_section = sec;
18575 data.contents = contents;
18577 bfd_hash_traverse (& globals->stub_hash_table, make_branch_to_a8_stub,
18584 if (globals->byteswap_code)
18586 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
18589 for (i = 0; i < mapcount; i++)
18591 if (i == mapcount - 1)
18594 end = map[i + 1].vma;
18596 switch (map[i].type)
18599 /* Byte swap code words. */
18600 while (ptr + 3 < end)
18602 tmp = contents[ptr];
18603 contents[ptr] = contents[ptr + 3];
18604 contents[ptr + 3] = tmp;
18605 tmp = contents[ptr + 1];
18606 contents[ptr + 1] = contents[ptr + 2];
18607 contents[ptr + 2] = tmp;
18613 /* Byte swap code halfwords. */
18614 while (ptr + 1 < end)
18616 tmp = contents[ptr];
18617 contents[ptr] = contents[ptr + 1];
18618 contents[ptr + 1] = tmp;
18624 /* Leave data alone. */
18632 arm_data->mapcount = -1;
18633 arm_data->mapsize = 0;
18634 arm_data->map = NULL;
18639 /* Mangle thumb function symbols as we read them in. */
18642 elf32_arm_swap_symbol_in (bfd * abfd,
18645 Elf_Internal_Sym *dst)
18647 Elf_Internal_Shdr *symtab_hdr;
18648 const char *name = NULL;
18650 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
18652 dst->st_target_internal = 0;
18654 /* New EABI objects mark thumb function symbols by setting the low bit of
18656 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
18657 || ELF_ST_TYPE (dst->st_info) == STT_GNU_IFUNC)
18659 if (dst->st_value & 1)
18661 dst->st_value &= ~(bfd_vma) 1;
18662 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal,
18663 ST_BRANCH_TO_THUMB);
18666 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_TO_ARM);
18668 else if (ELF_ST_TYPE (dst->st_info) == STT_ARM_TFUNC)
18670 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_FUNC);
18671 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_TO_THUMB);
18673 else if (ELF_ST_TYPE (dst->st_info) == STT_SECTION)
18674 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_LONG);
18676 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_UNKNOWN);
18678 /* Mark CMSE special symbols. */
18679 symtab_hdr = & elf_symtab_hdr (abfd);
18680 if (symtab_hdr->sh_size)
18681 name = bfd_elf_sym_name (abfd, symtab_hdr, dst, NULL);
18682 if (name && CONST_STRNEQ (name, CMSE_PREFIX))
18683 ARM_SET_SYM_CMSE_SPCL (dst->st_target_internal);
18689 /* Mangle thumb function symbols as we write them out. */
18692 elf32_arm_swap_symbol_out (bfd *abfd,
18693 const Elf_Internal_Sym *src,
18697 Elf_Internal_Sym newsym;
18699 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
18700 of the address set, as per the new EABI. We do this unconditionally
18701 because objcopy does not set the elf header flags until after
18702 it writes out the symbol table. */
18703 if (ARM_GET_SYM_BRANCH_TYPE (src->st_target_internal) == ST_BRANCH_TO_THUMB)
18706 if (ELF_ST_TYPE (src->st_info) != STT_GNU_IFUNC)
18707 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
18708 if (newsym.st_shndx != SHN_UNDEF)
18710 /* Do this only for defined symbols. At link type, the static
18711 linker will simulate the work of dynamic linker of resolving
18712 symbols and will carry over the thumbness of found symbols to
18713 the output symbol table. It's not clear how it happens, but
18714 the thumbness of undefined symbols can well be different at
18715 runtime, and writing '1' for them will be confusing for users
18716 and possibly for dynamic linker itself.
18718 newsym.st_value |= 1;
18723 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
18726 /* Add the PT_ARM_EXIDX program header. */
18729 elf32_arm_modify_segment_map (bfd *abfd,
18730 struct bfd_link_info *info ATTRIBUTE_UNUSED)
18732 struct elf_segment_map *m;
18735 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
18736 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
18738 /* If there is already a PT_ARM_EXIDX header, then we do not
18739 want to add another one. This situation arises when running
18740 "strip"; the input binary already has the header. */
18741 m = elf_seg_map (abfd);
18742 while (m && m->p_type != PT_ARM_EXIDX)
18746 m = (struct elf_segment_map *)
18747 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
18750 m->p_type = PT_ARM_EXIDX;
18752 m->sections[0] = sec;
18754 m->next = elf_seg_map (abfd);
18755 elf_seg_map (abfd) = m;
18762 /* We may add a PT_ARM_EXIDX program header. */
18765 elf32_arm_additional_program_headers (bfd *abfd,
18766 struct bfd_link_info *info ATTRIBUTE_UNUSED)
18770 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
18771 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
18777 /* Hook called by the linker routine which adds symbols from an object
18781 elf32_arm_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
18782 Elf_Internal_Sym *sym, const char **namep,
18783 flagword *flagsp, asection **secp, bfd_vma *valp)
18785 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
18786 && (abfd->flags & DYNAMIC) == 0
18787 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
18788 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
18790 if (elf32_arm_hash_table (info) == NULL)
18793 if (elf32_arm_hash_table (info)->vxworks_p
18794 && !elf_vxworks_add_symbol_hook (abfd, info, sym, namep,
18795 flagsp, secp, valp))
18801 /* We use this to override swap_symbol_in and swap_symbol_out. */
18802 const struct elf_size_info elf32_arm_size_info =
18804 sizeof (Elf32_External_Ehdr),
18805 sizeof (Elf32_External_Phdr),
18806 sizeof (Elf32_External_Shdr),
18807 sizeof (Elf32_External_Rel),
18808 sizeof (Elf32_External_Rela),
18809 sizeof (Elf32_External_Sym),
18810 sizeof (Elf32_External_Dyn),
18811 sizeof (Elf_External_Note),
18815 ELFCLASS32, EV_CURRENT,
18816 bfd_elf32_write_out_phdrs,
18817 bfd_elf32_write_shdrs_and_ehdr,
18818 bfd_elf32_checksum_contents,
18819 bfd_elf32_write_relocs,
18820 elf32_arm_swap_symbol_in,
18821 elf32_arm_swap_symbol_out,
18822 bfd_elf32_slurp_reloc_table,
18823 bfd_elf32_slurp_symbol_table,
18824 bfd_elf32_swap_dyn_in,
18825 bfd_elf32_swap_dyn_out,
18826 bfd_elf32_swap_reloc_in,
18827 bfd_elf32_swap_reloc_out,
18828 bfd_elf32_swap_reloca_in,
18829 bfd_elf32_swap_reloca_out
18833 read_code32 (const bfd *abfd, const bfd_byte *addr)
18835 /* V7 BE8 code is always little endian. */
18836 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
18837 return bfd_getl32 (addr);
18839 return bfd_get_32 (abfd, addr);
18843 read_code16 (const bfd *abfd, const bfd_byte *addr)
18845 /* V7 BE8 code is always little endian. */
18846 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
18847 return bfd_getl16 (addr);
18849 return bfd_get_16 (abfd, addr);
18852 /* Return size of plt0 entry starting at ADDR
18853 or (bfd_vma) -1 if size can not be determined. */
18856 elf32_arm_plt0_size (const bfd *abfd, const bfd_byte *addr)
18858 bfd_vma first_word;
18861 first_word = read_code32 (abfd, addr);
18863 if (first_word == elf32_arm_plt0_entry[0])
18864 plt0_size = 4 * ARRAY_SIZE (elf32_arm_plt0_entry);
18865 else if (first_word == elf32_thumb2_plt0_entry[0])
18866 plt0_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
18868 /* We don't yet handle this PLT format. */
18869 return (bfd_vma) -1;
18874 /* Return size of plt entry starting at offset OFFSET
18875 of plt section located at address START
18876 or (bfd_vma) -1 if size can not be determined. */
18879 elf32_arm_plt_size (const bfd *abfd, const bfd_byte *start, bfd_vma offset)
18881 bfd_vma first_insn;
18882 bfd_vma plt_size = 0;
18883 const bfd_byte *addr = start + offset;
18885 /* PLT entry size if fixed on Thumb-only platforms. */
18886 if (read_code32 (abfd, start) == elf32_thumb2_plt0_entry[0])
18887 return 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
18889 /* Respect Thumb stub if necessary. */
18890 if (read_code16 (abfd, addr) == elf32_arm_plt_thumb_stub[0])
18892 plt_size += 2 * ARRAY_SIZE(elf32_arm_plt_thumb_stub);
18895 /* Strip immediate from first add. */
18896 first_insn = read_code32 (abfd, addr + plt_size) & 0xffffff00;
18898 #ifdef FOUR_WORD_PLT
18899 if (first_insn == elf32_arm_plt_entry[0])
18900 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry);
18902 if (first_insn == elf32_arm_plt_entry_long[0])
18903 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_long);
18904 else if (first_insn == elf32_arm_plt_entry_short[0])
18905 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_short);
18908 /* We don't yet handle this PLT format. */
18909 return (bfd_vma) -1;
18914 /* Implementation is shamelessly borrowed from _bfd_elf_get_synthetic_symtab. */
18917 elf32_arm_get_synthetic_symtab (bfd *abfd,
18918 long symcount ATTRIBUTE_UNUSED,
18919 asymbol **syms ATTRIBUTE_UNUSED,
18929 Elf_Internal_Shdr *hdr;
18937 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
18940 if (dynsymcount <= 0)
18943 relplt = bfd_get_section_by_name (abfd, ".rel.plt");
18944 if (relplt == NULL)
18947 hdr = &elf_section_data (relplt)->this_hdr;
18948 if (hdr->sh_link != elf_dynsymtab (abfd)
18949 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
18952 plt = bfd_get_section_by_name (abfd, ".plt");
18956 if (!elf32_arm_size_info.slurp_reloc_table (abfd, relplt, dynsyms, TRUE))
18959 data = plt->contents;
18962 if (!bfd_get_full_section_contents(abfd, (asection *) plt, &data) || data == NULL)
18964 bfd_cache_section_contents((asection *) plt, data);
18967 count = relplt->size / hdr->sh_entsize;
18968 size = count * sizeof (asymbol);
18969 p = relplt->relocation;
18970 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
18972 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
18973 if (p->addend != 0)
18974 size += sizeof ("+0x") - 1 + 8;
18977 s = *ret = (asymbol *) bfd_malloc (size);
18981 offset = elf32_arm_plt0_size (abfd, data);
18982 if (offset == (bfd_vma) -1)
18985 names = (char *) (s + count);
18986 p = relplt->relocation;
18988 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
18992 bfd_vma plt_size = elf32_arm_plt_size (abfd, data, offset);
18993 if (plt_size == (bfd_vma) -1)
18996 *s = **p->sym_ptr_ptr;
18997 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
18998 we are defining a symbol, ensure one of them is set. */
18999 if ((s->flags & BSF_LOCAL) == 0)
19000 s->flags |= BSF_GLOBAL;
19001 s->flags |= BSF_SYNTHETIC;
19006 len = strlen ((*p->sym_ptr_ptr)->name);
19007 memcpy (names, (*p->sym_ptr_ptr)->name, len);
19009 if (p->addend != 0)
19013 memcpy (names, "+0x", sizeof ("+0x") - 1);
19014 names += sizeof ("+0x") - 1;
19015 bfd_sprintf_vma (abfd, buf, p->addend);
19016 for (a = buf; *a == '0'; ++a)
19019 memcpy (names, a, len);
19022 memcpy (names, "@plt", sizeof ("@plt"));
19023 names += sizeof ("@plt");
19025 offset += plt_size;
19032 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr * hdr)
19034 if (hdr->sh_flags & SHF_ARM_PURECODE)
19035 *flags |= SEC_ELF_PURECODE;
19040 elf32_arm_lookup_section_flags (char *flag_name)
19042 if (!strcmp (flag_name, "SHF_ARM_PURECODE"))
19043 return SHF_ARM_PURECODE;
19045 return SEC_NO_FLAGS;
19048 static unsigned int
19049 elf32_arm_count_additional_relocs (asection *sec)
19051 struct _arm_elf_section_data *arm_data;
19052 arm_data = get_arm_elf_section_data (sec);
19054 return arm_data == NULL ? 0 : arm_data->additional_reloc_count;
19057 static unsigned int
19058 elf32_arm_count_output_relocs (struct bfd_link_info * info,
19062 struct bfd_elf_section_data *esdo;
19063 struct bfd_link_order *p;
19064 bfd_size_type count;
19066 esdo = elf_section_data (o->output_section);
19067 if (esdo->this_hdr.sh_type != SHT_ARM_EXIDX)
19068 return _bfd_elf_default_count_output_relocs (info, o, rela);
19070 /* PR 20595: Skip relocations for deleted exidx entries. */
19072 for (p = o->map_head.link_order; p != NULL; p = p->next)
19074 struct _arm_elf_section_data *arm_data;
19075 struct bfd_elf_section_data *esd;
19076 arm_unwind_table_edit *edit_list;
19077 Elf_Internal_Rela *relocs;
19079 bfd_size_type num_rel;
19080 bfd_size_type num_rela;
19083 if (p->type == bfd_section_reloc_link_order
19084 || p->type == bfd_symbol_reloc_link_order)
19090 sec = p->u.indirect.section;
19091 arm_data = get_arm_elf_section_data (sec);
19092 esd = &arm_data->elf;
19094 if (arm_data->additional_reloc_count)
19095 count += arm_data->additional_reloc_count;
19097 edit_list = arm_data->u.exidx.unwind_edit_list;
19100 count += sec->reloc_count;
19104 relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
19105 info->keep_memory);
19106 num_rel = esd->rel.hdr ? NUM_SHDR_ENTRIES (esd->rel.hdr) : 0;
19107 num_rela = esd->rela.hdr ? NUM_SHDR_ENTRIES (esd->rela.hdr) : 0;
19111 for (i = 0; i < (rela ? num_rela : num_rel); i++)
19113 arm_unwind_table_edit *edit_node;
19114 unsigned int index;
19116 index = (relocs[i].r_offset - sec->vma) / 8;
19118 for (edit_node = edit_list;
19119 edit_node->next && edit_node->next->index > index;
19122 if (edit_node->type != DELETE_EXIDX_ENTRY
19123 || edit_node->index != index)
19131 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
19132 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
19133 FALSE otherwise. ISECTION is the best guess matching section from the
19134 input bfd IBFD, but it might be NULL. */
19137 elf32_arm_copy_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
19138 bfd *obfd ATTRIBUTE_UNUSED,
19139 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
19140 Elf_Internal_Shdr *osection)
19142 switch (osection->sh_type)
19144 case SHT_ARM_EXIDX:
19146 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
19147 Elf_Internal_Shdr **iheaders = elf_elfsections (ibfd);
19150 osection->sh_flags = SHF_ALLOC | SHF_LINK_ORDER;
19151 osection->sh_info = 0;
19153 /* The sh_link field must be set to the text section associated with
19154 this index section. Unfortunately the ARM EHABI does not specify
19155 exactly how to determine this association. Our caller does try
19156 to match up OSECTION with its corresponding input section however
19157 so that is a good first guess. */
19158 if (isection != NULL
19159 && osection->bfd_section != NULL
19160 && isection->bfd_section != NULL
19161 && isection->bfd_section->output_section != NULL
19162 && isection->bfd_section->output_section == osection->bfd_section
19163 && iheaders != NULL
19164 && isection->sh_link > 0
19165 && isection->sh_link < elf_numsections (ibfd)
19166 && iheaders[isection->sh_link]->bfd_section != NULL
19167 && iheaders[isection->sh_link]->bfd_section->output_section != NULL
19170 for (i = elf_numsections (obfd); i-- > 0;)
19171 if (oheaders[i]->bfd_section
19172 == iheaders[isection->sh_link]->bfd_section->output_section)
19178 /* Failing that we have to find a matching section ourselves. If
19179 we had the output section name available we could compare that
19180 with input section names. Unfortunately we don't. So instead
19181 we use a simple heuristic and look for the nearest executable
19182 section before this one. */
19183 for (i = elf_numsections (obfd); i-- > 0;)
19184 if (oheaders[i] == osection)
19190 if (oheaders[i]->sh_type == SHT_PROGBITS
19191 && (oheaders[i]->sh_flags & (SHF_ALLOC | SHF_EXECINSTR))
19192 == (SHF_ALLOC | SHF_EXECINSTR))
19198 osection->sh_link = i;
19199 /* If the text section was part of a group
19200 then the index section should be too. */
19201 if (oheaders[i]->sh_flags & SHF_GROUP)
19202 osection->sh_flags |= SHF_GROUP;
19208 case SHT_ARM_PREEMPTMAP:
19209 osection->sh_flags = SHF_ALLOC;
19212 case SHT_ARM_ATTRIBUTES:
19213 case SHT_ARM_DEBUGOVERLAY:
19214 case SHT_ARM_OVERLAYSECTION:
19222 /* Returns TRUE if NAME is an ARM mapping symbol.
19223 Traditionally the symbols $a, $d and $t have been used.
19224 The ARM ELF standard also defines $x (for A64 code). It also allows a
19225 period initiated suffix to be added to the symbol: "$[adtx]\.[:sym_char]+".
19226 Other tools might also produce $b (Thumb BL), $f, $p, $m and $v, but we do
19227 not support them here. $t.x indicates the start of ThumbEE instructions. */
19230 is_arm_mapping_symbol (const char * name)
19232 return name != NULL /* Paranoia. */
19233 && name[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
19234 the mapping symbols could have acquired a prefix.
19235 We do not support this here, since such symbols no
19236 longer conform to the ARM ELF ABI. */
19237 && (name[1] == 'a' || name[1] == 'd' || name[1] == 't' || name[1] == 'x')
19238 && (name[2] == 0 || name[2] == '.');
19239 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
19240 any characters that follow the period are legal characters for the body
19241 of a symbol's name. For now we just assume that this is the case. */
19244 /* Make sure that mapping symbols in object files are not removed via the
19245 "strip --strip-unneeded" tool. These symbols are needed in order to
19246 correctly generate interworking veneers, and for byte swapping code
19247 regions. Once an object file has been linked, it is safe to remove the
19248 symbols as they will no longer be needed. */
19251 elf32_arm_backend_symbol_processing (bfd *abfd, asymbol *sym)
19253 if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
19254 && sym->section != bfd_abs_section_ptr
19255 && is_arm_mapping_symbol (sym->name))
19256 sym->flags |= BSF_KEEP;
19260 emit_relocs (bfd * output_bfd,
19261 asection * input_section,
19262 Elf_Internal_Shdr * input_rel_hdr,
19263 Elf_Internal_Rela * internal_relocs,
19264 struct elf_link_hash_entry ** rel_hash,
19265 bfd_boolean (* fallback) (bfd *, asection *,
19266 Elf_Internal_Shdr *,
19267 Elf_Internal_Rela *,
19268 struct elf_link_hash_entry **))
19270 _arm_elf_section_data *arm_data;
19271 struct bfd_elf_section_reloc_data *output_reldata;
19272 Elf_Internal_Shdr *output_rel_hdr;
19273 Elf_Internal_Rela *irela;
19274 Elf_Internal_Rela *irelaend;
19275 asection *output_section;
19276 const struct elf_backend_data *bed;
19277 void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
19278 struct bfd_elf_section_data *esdo;
19279 arm_unwind_table_edit *edit_list, *edit_tail;
19283 arm_data = get_arm_elf_section_data (input_section);
19285 if (!arm_data || arm_data->elf.this_hdr.sh_type != SHT_ARM_EXIDX)
19286 goto fallback_label;
19288 edit_list = arm_data->u.exidx.unwind_edit_list;
19289 edit_tail = arm_data->u.exidx.unwind_edit_tail;
19292 goto fallback_label;
19294 output_section = input_section->output_section;
19295 offset = output_section->vma + input_section->output_offset;
19297 bed = get_elf_backend_data (output_bfd);
19298 esdo = elf_section_data (output_section);
19299 if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize)
19301 output_reldata = &esdo->rel;
19302 swap_out = bed->s->swap_reloc_out;
19304 else if (esdo->rela.hdr
19305 && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize)
19307 output_reldata = &esdo->rela;
19308 swap_out = bed->s->swap_reloca_out;
19312 (*_bfd_error_handler)
19313 (_("%B: relocation size mismatch in %B section %A"),
19314 output_bfd, input_section->owner, input_section);
19315 bfd_set_error (bfd_error_wrong_format);
19319 output_rel_hdr = output_reldata->hdr;
19320 erel = output_rel_hdr->contents;
19321 erel += output_reldata->count * input_rel_hdr->sh_entsize;
19323 irela = internal_relocs;
19324 irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr)
19325 * bed->s->int_rels_per_ext_rel);
19326 while (irela < irelaend)
19328 arm_unwind_table_edit *edit_node, *edit_next;
19329 Elf_Internal_Rela rel;
19333 index = (irela->r_offset - offset) / 8;
19336 edit_node = edit_list;
19337 for (edit_next = edit_list;
19338 edit_next && edit_next->index <= index;
19339 edit_next = edit_node->next)
19342 edit_node = edit_next;
19345 if (edit_node->type != DELETE_EXIDX_ENTRY || edit_node->index != index)
19347 rel.r_offset = irela->r_offset - bias * 8;
19348 rel.r_info = irela->r_info;
19349 rel.r_addend = irela->r_addend;
19351 (*swap_out) (output_bfd, &rel, erel);
19352 erel += output_rel_hdr->sh_entsize;
19353 output_reldata->count++;
19356 irela += bed->s->int_rels_per_ext_rel;
19359 if (edit_tail->type == INSERT_EXIDX_CANTUNWIND_AT_END)
19361 /* New relocation entity. */
19362 asection *text_sec = edit_tail->linked_section;
19363 asection *text_out = text_sec->output_section;
19364 bfd_vma exidx_offset = offset + input_section->size - 8;
19365 Elf_Internal_Rela rel;
19368 rel.r_offset = exidx_offset;
19369 rel.r_info = ELF32_R_INFO (text_out->target_index, R_ARM_PREL31);
19370 (*swap_out) (output_bfd, &rel, erel);
19371 output_reldata->count++;
19377 return fallback (output_bfd, input_section, input_rel_hdr,
19378 internal_relocs, rel_hash);
19382 elf32_arm_emit_relocs (bfd * output_bfd,
19383 asection * input_section,
19384 Elf_Internal_Shdr * input_rel_hdr,
19385 Elf_Internal_Rela * internal_relocs,
19386 struct elf_link_hash_entry ** rel_hash)
19388 return emit_relocs (output_bfd, input_section, input_rel_hdr, internal_relocs,
19389 rel_hash, _bfd_elf_link_output_relocs);
19392 #undef elf_backend_copy_special_section_fields
19393 #define elf_backend_copy_special_section_fields elf32_arm_copy_special_section_fields
19395 #define ELF_ARCH bfd_arch_arm
19396 #define ELF_TARGET_ID ARM_ELF_DATA
19397 #define ELF_MACHINE_CODE EM_ARM
19398 #ifdef __QNXTARGET__
19399 #define ELF_MAXPAGESIZE 0x1000
19401 #define ELF_MAXPAGESIZE 0x10000
19403 #define ELF_MINPAGESIZE 0x1000
19404 #define ELF_COMMONPAGESIZE 0x1000
19406 #define bfd_elf32_mkobject elf32_arm_mkobject
19408 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
19409 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
19410 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
19411 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
19412 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
19413 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
19414 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
19415 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
19416 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
19417 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
19418 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
19419 #define bfd_elf32_bfd_final_link elf32_arm_final_link
19420 #define bfd_elf32_get_synthetic_symtab elf32_arm_get_synthetic_symtab
19422 #define elf_backend_emit_relocs elf32_arm_emit_relocs
19423 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
19424 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
19425 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
19426 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
19427 #define elf_backend_check_relocs elf32_arm_check_relocs
19428 #define elf_backend_relocate_section elf32_arm_relocate_section
19429 #define elf_backend_write_section elf32_arm_write_section
19430 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
19431 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
19432 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
19433 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
19434 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
19435 #define elf_backend_always_size_sections elf32_arm_always_size_sections
19436 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
19437 #define elf_backend_post_process_headers elf32_arm_post_process_headers
19438 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
19439 #define elf_backend_object_p elf32_arm_object_p
19440 #define elf_backend_fake_sections elf32_arm_fake_sections
19441 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
19442 #define elf_backend_final_write_processing elf32_arm_final_write_processing
19443 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
19444 #define elf_backend_size_info elf32_arm_size_info
19445 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
19446 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
19447 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
19448 #define elf_backend_filter_implib_symbols elf32_arm_filter_implib_symbols
19449 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
19450 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
19451 #define elf_backend_count_additional_relocs elf32_arm_count_additional_relocs
19452 #define elf_backend_count_output_relocs elf32_arm_count_output_relocs
19453 #define elf_backend_symbol_processing elf32_arm_backend_symbol_processing
19455 #define elf_backend_can_refcount 1
19456 #define elf_backend_can_gc_sections 1
19457 #define elf_backend_plt_readonly 1
19458 #define elf_backend_want_got_plt 1
19459 #define elf_backend_want_plt_sym 0
19460 #define elf_backend_may_use_rel_p 1
19461 #define elf_backend_may_use_rela_p 0
19462 #define elf_backend_default_use_rela_p 0
19464 #define elf_backend_got_header_size 12
19465 #define elf_backend_extern_protected_data 1
19467 #undef elf_backend_obj_attrs_vendor
19468 #define elf_backend_obj_attrs_vendor "aeabi"
19469 #undef elf_backend_obj_attrs_section
19470 #define elf_backend_obj_attrs_section ".ARM.attributes"
19471 #undef elf_backend_obj_attrs_arg_type
19472 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
19473 #undef elf_backend_obj_attrs_section_type
19474 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
19475 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
19476 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
19478 #undef elf_backend_section_flags
19479 #define elf_backend_section_flags elf32_arm_section_flags
19480 #undef elf_backend_lookup_section_flags_hook
19481 #define elf_backend_lookup_section_flags_hook elf32_arm_lookup_section_flags
19483 #include "elf32-target.h"
19485 /* Native Client targets. */
19487 #undef TARGET_LITTLE_SYM
19488 #define TARGET_LITTLE_SYM arm_elf32_nacl_le_vec
19489 #undef TARGET_LITTLE_NAME
19490 #define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
19491 #undef TARGET_BIG_SYM
19492 #define TARGET_BIG_SYM arm_elf32_nacl_be_vec
19493 #undef TARGET_BIG_NAME
19494 #define TARGET_BIG_NAME "elf32-bigarm-nacl"
19496 /* Like elf32_arm_link_hash_table_create -- but overrides
19497 appropriately for NaCl. */
19499 static struct bfd_link_hash_table *
19500 elf32_arm_nacl_link_hash_table_create (bfd *abfd)
19502 struct bfd_link_hash_table *ret;
19504 ret = elf32_arm_link_hash_table_create (abfd);
19507 struct elf32_arm_link_hash_table *htab
19508 = (struct elf32_arm_link_hash_table *) ret;
19512 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry);
19513 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry);
19518 /* Since NaCl doesn't use the ARM-specific unwind format, we don't
19519 really need to use elf32_arm_modify_segment_map. But we do it
19520 anyway just to reduce gratuitous differences with the stock ARM backend. */
19523 elf32_arm_nacl_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
19525 return (elf32_arm_modify_segment_map (abfd, info)
19526 && nacl_modify_segment_map (abfd, info));
19530 elf32_arm_nacl_final_write_processing (bfd *abfd, bfd_boolean linker)
19532 elf32_arm_final_write_processing (abfd, linker);
19533 nacl_final_write_processing (abfd, linker);
19537 elf32_arm_nacl_plt_sym_val (bfd_vma i, const asection *plt,
19538 const arelent *rel ATTRIBUTE_UNUSED)
19541 + 4 * (ARRAY_SIZE (elf32_arm_nacl_plt0_entry) +
19542 i * ARRAY_SIZE (elf32_arm_nacl_plt_entry));
19546 #define elf32_bed elf32_arm_nacl_bed
19547 #undef bfd_elf32_bfd_link_hash_table_create
19548 #define bfd_elf32_bfd_link_hash_table_create \
19549 elf32_arm_nacl_link_hash_table_create
19550 #undef elf_backend_plt_alignment
19551 #define elf_backend_plt_alignment 4
19552 #undef elf_backend_modify_segment_map
19553 #define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
19554 #undef elf_backend_modify_program_headers
19555 #define elf_backend_modify_program_headers nacl_modify_program_headers
19556 #undef elf_backend_final_write_processing
19557 #define elf_backend_final_write_processing elf32_arm_nacl_final_write_processing
19558 #undef bfd_elf32_get_synthetic_symtab
19559 #undef elf_backend_plt_sym_val
19560 #define elf_backend_plt_sym_val elf32_arm_nacl_plt_sym_val
19561 #undef elf_backend_copy_special_section_fields
19563 #undef ELF_MINPAGESIZE
19564 #undef ELF_COMMONPAGESIZE
19567 #include "elf32-target.h"
19569 /* Reset to defaults. */
19570 #undef elf_backend_plt_alignment
19571 #undef elf_backend_modify_segment_map
19572 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
19573 #undef elf_backend_modify_program_headers
19574 #undef elf_backend_final_write_processing
19575 #define elf_backend_final_write_processing elf32_arm_final_write_processing
19576 #undef ELF_MINPAGESIZE
19577 #define ELF_MINPAGESIZE 0x1000
19578 #undef ELF_COMMONPAGESIZE
19579 #define ELF_COMMONPAGESIZE 0x1000
19582 /* VxWorks Targets. */
19584 #undef TARGET_LITTLE_SYM
19585 #define TARGET_LITTLE_SYM arm_elf32_vxworks_le_vec
19586 #undef TARGET_LITTLE_NAME
19587 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
19588 #undef TARGET_BIG_SYM
19589 #define TARGET_BIG_SYM arm_elf32_vxworks_be_vec
19590 #undef TARGET_BIG_NAME
19591 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
19593 /* Like elf32_arm_link_hash_table_create -- but overrides
19594 appropriately for VxWorks. */
19596 static struct bfd_link_hash_table *
19597 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
19599 struct bfd_link_hash_table *ret;
19601 ret = elf32_arm_link_hash_table_create (abfd);
19604 struct elf32_arm_link_hash_table *htab
19605 = (struct elf32_arm_link_hash_table *) ret;
19607 htab->vxworks_p = 1;
19613 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
19615 elf32_arm_final_write_processing (abfd, linker);
19616 elf_vxworks_final_write_processing (abfd, linker);
19620 elf32_arm_vxworks_emit_relocs (bfd * output_bfd,
19621 asection * input_section,
19622 Elf_Internal_Shdr * input_rel_hdr,
19623 Elf_Internal_Rela * internal_relocs,
19624 struct elf_link_hash_entry ** rel_hash)
19626 return emit_relocs (output_bfd, input_section, input_rel_hdr, internal_relocs,
19627 rel_hash, elf_vxworks_emit_relocs);
19631 #define elf32_bed elf32_arm_vxworks_bed
19633 #undef bfd_elf32_bfd_link_hash_table_create
19634 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
19635 #undef elf_backend_final_write_processing
19636 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
19637 #undef elf_backend_emit_relocs
19638 #define elf_backend_emit_relocs elf32_arm_vxworks_emit_relocs
19640 #undef elf_backend_may_use_rel_p
19641 #define elf_backend_may_use_rel_p 0
19642 #undef elf_backend_may_use_rela_p
19643 #define elf_backend_may_use_rela_p 1
19644 #undef elf_backend_default_use_rela_p
19645 #define elf_backend_default_use_rela_p 1
19646 #undef elf_backend_want_plt_sym
19647 #define elf_backend_want_plt_sym 1
19648 #undef ELF_MAXPAGESIZE
19649 #define ELF_MAXPAGESIZE 0x1000
19651 #include "elf32-target.h"
19654 /* Merge backend specific data from an object file to the output
19655 object file when linking. */
19658 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
19660 flagword out_flags;
19662 bfd_boolean flags_compatible = TRUE;
19665 /* Check if we have the same endianness. */
19666 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
19669 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
19672 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
19675 /* The input BFD must have had its flags initialised. */
19676 /* The following seems bogus to me -- The flags are initialized in
19677 the assembler but I don't think an elf_flags_init field is
19678 written into the object. */
19679 /* BFD_ASSERT (elf_flags_init (ibfd)); */
19681 in_flags = elf_elfheader (ibfd)->e_flags;
19682 out_flags = elf_elfheader (obfd)->e_flags;
19684 /* In theory there is no reason why we couldn't handle this. However
19685 in practice it isn't even close to working and there is no real
19686 reason to want it. */
19687 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
19688 && !(ibfd->flags & DYNAMIC)
19689 && (in_flags & EF_ARM_BE8))
19691 _bfd_error_handler (_("error: %B is already in final BE8 format"),
19696 if (!elf_flags_init (obfd))
19698 /* If the input is the default architecture and had the default
19699 flags then do not bother setting the flags for the output
19700 architecture, instead allow future merges to do this. If no
19701 future merges ever set these flags then they will retain their
19702 uninitialised values, which surprise surprise, correspond
19703 to the default values. */
19704 if (bfd_get_arch_info (ibfd)->the_default
19705 && elf_elfheader (ibfd)->e_flags == 0)
19708 elf_flags_init (obfd) = TRUE;
19709 elf_elfheader (obfd)->e_flags = in_flags;
19711 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
19712 && bfd_get_arch_info (obfd)->the_default)
19713 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
19718 /* Determine what should happen if the input ARM architecture
19719 does not match the output ARM architecture. */
19720 if (! bfd_arm_merge_machines (ibfd, obfd))
19723 /* Identical flags must be compatible. */
19724 if (in_flags == out_flags)
19727 /* Check to see if the input BFD actually contains any sections. If
19728 not, its flags may not have been initialised either, but it
19729 cannot actually cause any incompatiblity. Do not short-circuit
19730 dynamic objects; their section list may be emptied by
19731 elf_link_add_object_symbols.
19733 Also check to see if there are no code sections in the input.
19734 In this case there is no need to check for code specific flags.
19735 XXX - do we need to worry about floating-point format compatability
19736 in data sections ? */
19737 if (!(ibfd->flags & DYNAMIC))
19739 bfd_boolean null_input_bfd = TRUE;
19740 bfd_boolean only_data_sections = TRUE;
19742 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
19744 /* Ignore synthetic glue sections. */
19745 if (strcmp (sec->name, ".glue_7")
19746 && strcmp (sec->name, ".glue_7t"))
19748 if ((bfd_get_section_flags (ibfd, sec)
19749 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
19750 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
19751 only_data_sections = FALSE;
19753 null_input_bfd = FALSE;
19758 if (null_input_bfd || only_data_sections)
19762 /* Complain about various flag mismatches. */
19763 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
19764 EF_ARM_EABI_VERSION (out_flags)))
19767 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
19769 (in_flags & EF_ARM_EABIMASK) >> 24,
19770 (out_flags & EF_ARM_EABIMASK) >> 24);
19774 /* Not sure what needs to be checked for EABI versions >= 1. */
19775 /* VxWorks libraries do not use these flags. */
19776 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
19777 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
19778 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
19780 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
19783 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
19785 in_flags & EF_ARM_APCS_26 ? 26 : 32,
19786 out_flags & EF_ARM_APCS_26 ? 26 : 32);
19787 flags_compatible = FALSE;
19790 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
19792 if (in_flags & EF_ARM_APCS_FLOAT)
19794 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
19798 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
19801 flags_compatible = FALSE;
19804 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
19806 if (in_flags & EF_ARM_VFP_FLOAT)
19808 (_("error: %B uses VFP instructions, whereas %B does not"),
19812 (_("error: %B uses FPA instructions, whereas %B does not"),
19815 flags_compatible = FALSE;
19818 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
19820 if (in_flags & EF_ARM_MAVERICK_FLOAT)
19822 (_("error: %B uses Maverick instructions, whereas %B does not"),
19826 (_("error: %B does not use Maverick instructions, whereas %B does"),
19829 flags_compatible = FALSE;
19832 #ifdef EF_ARM_SOFT_FLOAT
19833 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
19835 /* We can allow interworking between code that is VFP format
19836 layout, and uses either soft float or integer regs for
19837 passing floating point arguments and results. We already
19838 know that the APCS_FLOAT flags match; similarly for VFP
19840 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
19841 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
19843 if (in_flags & EF_ARM_SOFT_FLOAT)
19845 (_("error: %B uses software FP, whereas %B uses hardware FP"),
19849 (_("error: %B uses hardware FP, whereas %B uses software FP"),
19852 flags_compatible = FALSE;
19857 /* Interworking mismatch is only a warning. */
19858 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
19860 if (in_flags & EF_ARM_INTERWORK)
19863 (_("Warning: %B supports interworking, whereas %B does not"),
19869 (_("Warning: %B does not support interworking, whereas %B does"),
19875 return flags_compatible;
19879 /* Symbian OS Targets. */
19881 #undef TARGET_LITTLE_SYM
19882 #define TARGET_LITTLE_SYM arm_elf32_symbian_le_vec
19883 #undef TARGET_LITTLE_NAME
19884 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
19885 #undef TARGET_BIG_SYM
19886 #define TARGET_BIG_SYM arm_elf32_symbian_be_vec
19887 #undef TARGET_BIG_NAME
19888 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
19890 /* Like elf32_arm_link_hash_table_create -- but overrides
19891 appropriately for Symbian OS. */
19893 static struct bfd_link_hash_table *
19894 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
19896 struct bfd_link_hash_table *ret;
19898 ret = elf32_arm_link_hash_table_create (abfd);
19901 struct elf32_arm_link_hash_table *htab
19902 = (struct elf32_arm_link_hash_table *)ret;
19903 /* There is no PLT header for Symbian OS. */
19904 htab->plt_header_size = 0;
19905 /* The PLT entries are each one instruction and one word. */
19906 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
19907 htab->symbian_p = 1;
19908 /* Symbian uses armv5t or above, so use_blx is always true. */
19910 htab->root.is_relocatable_executable = 1;
19915 static const struct bfd_elf_special_section
19916 elf32_arm_symbian_special_sections[] =
19918 /* In a BPABI executable, the dynamic linking sections do not go in
19919 the loadable read-only segment. The post-linker may wish to
19920 refer to these sections, but they are not part of the final
19922 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
19923 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
19924 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
19925 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
19926 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
19927 /* These sections do not need to be writable as the SymbianOS
19928 postlinker will arrange things so that no dynamic relocation is
19930 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
19931 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
19932 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
19933 { NULL, 0, 0, 0, 0 }
19937 elf32_arm_symbian_begin_write_processing (bfd *abfd,
19938 struct bfd_link_info *link_info)
19940 /* BPABI objects are never loaded directly by an OS kernel; they are
19941 processed by a postlinker first, into an OS-specific format. If
19942 the D_PAGED bit is set on the file, BFD will align segments on
19943 page boundaries, so that an OS can directly map the file. With
19944 BPABI objects, that just results in wasted space. In addition,
19945 because we clear the D_PAGED bit, map_sections_to_segments will
19946 recognize that the program headers should not be mapped into any
19947 loadable segment. */
19948 abfd->flags &= ~D_PAGED;
19949 elf32_arm_begin_write_processing (abfd, link_info);
19953 elf32_arm_symbian_modify_segment_map (bfd *abfd,
19954 struct bfd_link_info *info)
19956 struct elf_segment_map *m;
19959 /* BPABI shared libraries and executables should have a PT_DYNAMIC
19960 segment. However, because the .dynamic section is not marked
19961 with SEC_LOAD, the generic ELF code will not create such a
19963 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
19966 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
19967 if (m->p_type == PT_DYNAMIC)
19972 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
19973 m->next = elf_seg_map (abfd);
19974 elf_seg_map (abfd) = m;
19978 /* Also call the generic arm routine. */
19979 return elf32_arm_modify_segment_map (abfd, info);
19982 /* Return address for Ith PLT stub in section PLT, for relocation REL
19983 or (bfd_vma) -1 if it should not be included. */
19986 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
19987 const arelent *rel ATTRIBUTE_UNUSED)
19989 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
19993 #define elf32_bed elf32_arm_symbian_bed
19995 /* The dynamic sections are not allocated on SymbianOS; the postlinker
19996 will process them and then discard them. */
19997 #undef ELF_DYNAMIC_SEC_FLAGS
19998 #define ELF_DYNAMIC_SEC_FLAGS \
19999 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
20001 #undef elf_backend_emit_relocs
20002 #define elf_backend_emit_relocs elf32_arm_emit_relocs
20004 #undef bfd_elf32_bfd_link_hash_table_create
20005 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
20006 #undef elf_backend_special_sections
20007 #define elf_backend_special_sections elf32_arm_symbian_special_sections
20008 #undef elf_backend_begin_write_processing
20009 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
20010 #undef elf_backend_final_write_processing
20011 #define elf_backend_final_write_processing elf32_arm_final_write_processing
20013 #undef elf_backend_modify_segment_map
20014 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
20016 /* There is no .got section for BPABI objects, and hence no header. */
20017 #undef elf_backend_got_header_size
20018 #define elf_backend_got_header_size 0
20020 /* Similarly, there is no .got.plt section. */
20021 #undef elf_backend_want_got_plt
20022 #define elf_backend_want_got_plt 0
20024 #undef elf_backend_plt_sym_val
20025 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
20027 #undef elf_backend_may_use_rel_p
20028 #define elf_backend_may_use_rel_p 1
20029 #undef elf_backend_may_use_rela_p
20030 #define elf_backend_may_use_rela_p 0
20031 #undef elf_backend_default_use_rela_p
20032 #define elf_backend_default_use_rela_p 0
20033 #undef elf_backend_want_plt_sym
20034 #define elf_backend_want_plt_sym 0
20035 #undef ELF_MAXPAGESIZE
20036 #define ELF_MAXPAGESIZE 0x8000
20038 #include "elf32-target.h"