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 /* The name of the dynamic interpreter. This is put in the .interp
2143 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2145 static const unsigned long tls_trampoline [] =
2147 0xe08e0000, /* add r0, lr, r0 */
2148 0xe5901004, /* ldr r1, [r0,#4] */
2149 0xe12fff11, /* bx r1 */
2152 static const unsigned long dl_tlsdesc_lazy_trampoline [] =
2154 0xe52d2004, /* push {r2} */
2155 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2156 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2157 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2158 0xe081100f, /* 2: add r1, pc */
2159 0xe12fff12, /* bx r2 */
2160 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2161 + dl_tlsdesc_lazy_resolver(GOT) */
2162 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2165 #ifdef FOUR_WORD_PLT
2167 /* The first entry in a procedure linkage table looks like
2168 this. It is set up so that any shared library function that is
2169 called before the relocation has been set up calls the dynamic
2171 static const bfd_vma elf32_arm_plt0_entry [] =
2173 0xe52de004, /* str lr, [sp, #-4]! */
2174 0xe59fe010, /* ldr lr, [pc, #16] */
2175 0xe08fe00e, /* add lr, pc, lr */
2176 0xe5bef008, /* ldr pc, [lr, #8]! */
2179 /* Subsequent entries in a procedure linkage table look like
2181 static const bfd_vma elf32_arm_plt_entry [] =
2183 0xe28fc600, /* add ip, pc, #NN */
2184 0xe28cca00, /* add ip, ip, #NN */
2185 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2186 0x00000000, /* unused */
2189 #else /* not FOUR_WORD_PLT */
2191 /* The first entry in a procedure linkage table looks like
2192 this. It is set up so that any shared library function that is
2193 called before the relocation has been set up calls the dynamic
2195 static const bfd_vma elf32_arm_plt0_entry [] =
2197 0xe52de004, /* str lr, [sp, #-4]! */
2198 0xe59fe004, /* ldr lr, [pc, #4] */
2199 0xe08fe00e, /* add lr, pc, lr */
2200 0xe5bef008, /* ldr pc, [lr, #8]! */
2201 0x00000000, /* &GOT[0] - . */
2204 /* By default subsequent entries in a procedure linkage table look like
2205 this. Offsets that don't fit into 28 bits will cause link error. */
2206 static const bfd_vma elf32_arm_plt_entry_short [] =
2208 0xe28fc600, /* add ip, pc, #0xNN00000 */
2209 0xe28cca00, /* add ip, ip, #0xNN000 */
2210 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2213 /* When explicitly asked, we'll use this "long" entry format
2214 which can cope with arbitrary displacements. */
2215 static const bfd_vma elf32_arm_plt_entry_long [] =
2217 0xe28fc200, /* add ip, pc, #0xN0000000 */
2218 0xe28cc600, /* add ip, ip, #0xNN00000 */
2219 0xe28cca00, /* add ip, ip, #0xNN000 */
2220 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2223 static bfd_boolean elf32_arm_use_long_plt_entry = FALSE;
2225 #endif /* not FOUR_WORD_PLT */
2227 /* The first entry in a procedure linkage table looks like this.
2228 It is set up so that any shared library function that is called before the
2229 relocation has been set up calls the dynamic linker first. */
2230 static const bfd_vma elf32_thumb2_plt0_entry [] =
2232 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2233 an instruction maybe encoded to one or two array elements. */
2234 0xf8dfb500, /* push {lr} */
2235 0x44fee008, /* ldr.w lr, [pc, #8] */
2237 0xff08f85e, /* ldr.w pc, [lr, #8]! */
2238 0x00000000, /* &GOT[0] - . */
2241 /* Subsequent entries in a procedure linkage table for thumb only target
2243 static const bfd_vma elf32_thumb2_plt_entry [] =
2245 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2246 an instruction maybe encoded to one or two array elements. */
2247 0x0c00f240, /* movw ip, #0xNNNN */
2248 0x0c00f2c0, /* movt ip, #0xNNNN */
2249 0xf8dc44fc, /* add ip, pc */
2250 0xbf00f000 /* ldr.w pc, [ip] */
2254 /* The format of the first entry in the procedure linkage table
2255 for a VxWorks executable. */
2256 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
2258 0xe52dc008, /* str ip,[sp,#-8]! */
2259 0xe59fc000, /* ldr ip,[pc] */
2260 0xe59cf008, /* ldr pc,[ip,#8] */
2261 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2264 /* The format of subsequent entries in a VxWorks executable. */
2265 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
2267 0xe59fc000, /* ldr ip,[pc] */
2268 0xe59cf000, /* ldr pc,[ip] */
2269 0x00000000, /* .long @got */
2270 0xe59fc000, /* ldr ip,[pc] */
2271 0xea000000, /* b _PLT */
2272 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2275 /* The format of entries in a VxWorks shared library. */
2276 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
2278 0xe59fc000, /* ldr ip,[pc] */
2279 0xe79cf009, /* ldr pc,[ip,r9] */
2280 0x00000000, /* .long @got */
2281 0xe59fc000, /* ldr ip,[pc] */
2282 0xe599f008, /* ldr pc,[r9,#8] */
2283 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2286 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2287 #define PLT_THUMB_STUB_SIZE 4
2288 static const bfd_vma elf32_arm_plt_thumb_stub [] =
2294 /* The entries in a PLT when using a DLL-based target with multiple
2296 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2298 0xe51ff004, /* ldr pc, [pc, #-4] */
2299 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2302 /* The first entry in a procedure linkage table looks like
2303 this. It is set up so that any shared library function that is
2304 called before the relocation has been set up calls the dynamic
2306 static const bfd_vma elf32_arm_nacl_plt0_entry [] =
2309 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2310 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2311 0xe08cc00f, /* add ip, ip, pc */
2312 0xe52dc008, /* str ip, [sp, #-8]! */
2313 /* Second bundle: */
2314 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2315 0xe59cc000, /* ldr ip, [ip] */
2316 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2317 0xe12fff1c, /* bx ip */
2319 0xe320f000, /* nop */
2320 0xe320f000, /* nop */
2321 0xe320f000, /* nop */
2323 0xe50dc004, /* str ip, [sp, #-4] */
2324 /* Fourth bundle: */
2325 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2326 0xe59cc000, /* ldr ip, [ip] */
2327 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2328 0xe12fff1c, /* bx ip */
2330 #define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2332 /* Subsequent entries in a procedure linkage table look like this. */
2333 static const bfd_vma elf32_arm_nacl_plt_entry [] =
2335 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2336 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2337 0xe08cc00f, /* add ip, ip, pc */
2338 0xea000000, /* b .Lplt_tail */
2341 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2342 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2343 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2344 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2345 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2346 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2347 #define THM2_MAX_FWD_COND_BRANCH_OFFSET (((1 << 20) -2) + 4)
2348 #define THM2_MAX_BWD_COND_BRANCH_OFFSET (-(1 << 20) + 4)
2358 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2359 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2360 is inserted in arm_build_one_stub(). */
2361 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2362 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2363 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2364 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2365 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2366 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2371 enum stub_insn_type type;
2372 unsigned int r_type;
2376 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2377 to reach the stub if necessary. */
2378 static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
2380 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2381 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2384 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2386 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] =
2388 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2389 ARM_INSN (0xe12fff1c), /* bx ip */
2390 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2393 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2394 static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
2396 THUMB16_INSN (0xb401), /* push {r0} */
2397 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2398 THUMB16_INSN (0x4684), /* mov ip, r0 */
2399 THUMB16_INSN (0xbc01), /* pop {r0} */
2400 THUMB16_INSN (0x4760), /* bx ip */
2401 THUMB16_INSN (0xbf00), /* nop */
2402 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2405 /* Thumb -> Thumb long branch stub in thumb2 encoding. Used on armv7. */
2406 static const insn_sequence elf32_arm_stub_long_branch_thumb2_only[] =
2408 THUMB32_INSN (0xf85ff000), /* ldr.w pc, [pc, #-0] */
2409 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(x) */
2412 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2414 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
2416 THUMB16_INSN (0x4778), /* bx pc */
2417 THUMB16_INSN (0x46c0), /* nop */
2418 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2419 ARM_INSN (0xe12fff1c), /* bx ip */
2420 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2423 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2425 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
2427 THUMB16_INSN (0x4778), /* bx pc */
2428 THUMB16_INSN (0x46c0), /* nop */
2429 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2430 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2433 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2434 one, when the destination is close enough. */
2435 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
2437 THUMB16_INSN (0x4778), /* bx pc */
2438 THUMB16_INSN (0x46c0), /* nop */
2439 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2442 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2443 blx to reach the stub if necessary. */
2444 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] =
2446 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2447 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
2448 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2451 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2452 blx to reach the stub if necessary. We can not add into pc;
2453 it is not guaranteed to mode switch (different in ARMv6 and
2455 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] =
2457 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2458 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2459 ARM_INSN (0xe12fff1c), /* bx ip */
2460 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2463 /* V4T ARM -> ARM long branch stub, PIC. */
2464 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
2466 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2467 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2468 ARM_INSN (0xe12fff1c), /* bx ip */
2469 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2472 /* V4T Thumb -> ARM long branch stub, PIC. */
2473 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
2475 THUMB16_INSN (0x4778), /* bx pc */
2476 THUMB16_INSN (0x46c0), /* nop */
2477 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2478 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
2479 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2482 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2484 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
2486 THUMB16_INSN (0xb401), /* push {r0} */
2487 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2488 THUMB16_INSN (0x46fc), /* mov ip, pc */
2489 THUMB16_INSN (0x4484), /* add ip, r0 */
2490 THUMB16_INSN (0xbc01), /* pop {r0} */
2491 THUMB16_INSN (0x4760), /* bx ip */
2492 DATA_WORD (0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */
2495 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2497 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
2499 THUMB16_INSN (0x4778), /* bx pc */
2500 THUMB16_INSN (0x46c0), /* nop */
2501 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2502 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2503 ARM_INSN (0xe12fff1c), /* bx ip */
2504 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2507 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2508 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2509 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
2511 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2512 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
2513 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2516 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2517 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2518 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
2520 THUMB16_INSN (0x4778), /* bx pc */
2521 THUMB16_INSN (0x46c0), /* nop */
2522 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2523 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
2524 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2527 /* NaCl ARM -> ARM long branch stub. */
2528 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl[] =
2530 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2531 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2532 ARM_INSN (0xe12fff1c), /* bx ip */
2533 ARM_INSN (0xe320f000), /* nop */
2534 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2535 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2536 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2537 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2540 /* NaCl ARM -> ARM long branch stub, PIC. */
2541 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl_pic[] =
2543 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2544 ARM_INSN (0xe08cc00f), /* add ip, ip, pc */
2545 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2546 ARM_INSN (0xe12fff1c), /* bx ip */
2547 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2548 DATA_WORD (0, R_ARM_REL32, 8), /* dcd R_ARM_REL32(X+8) */
2549 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2550 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2554 /* Cortex-A8 erratum-workaround stubs. */
2556 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2557 can't use a conditional branch to reach this stub). */
2559 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond[] =
2561 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
2562 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2563 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2566 /* Stub used for b.w and bl.w instructions. */
2568 static const insn_sequence elf32_arm_stub_a8_veneer_b[] =
2570 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2573 static const insn_sequence elf32_arm_stub_a8_veneer_bl[] =
2575 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2578 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2579 instruction (which switches to ARM mode) to point to this stub. Jump to the
2580 real destination using an ARM-mode branch. */
2582 static const insn_sequence elf32_arm_stub_a8_veneer_blx[] =
2584 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2587 /* For each section group there can be a specially created linker section
2588 to hold the stubs for that group. The name of the stub section is based
2589 upon the name of another section within that group with the suffix below
2592 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2593 create what appeared to be a linker stub section when it actually
2594 contained user code/data. For example, consider this fragment:
2596 const char * stubborn_problems[] = { "np" };
2598 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2601 .data.rel.local.stubborn_problems
2603 This then causes problems in arm32_arm_build_stubs() as it triggers:
2605 // Ignore non-stub sections.
2606 if (!strstr (stub_sec->name, STUB_SUFFIX))
2609 And so the section would be ignored instead of being processed. Hence
2610 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2612 #define STUB_SUFFIX ".__stub"
2614 /* One entry per long/short branch stub defined above. */
2616 DEF_STUB(long_branch_any_any) \
2617 DEF_STUB(long_branch_v4t_arm_thumb) \
2618 DEF_STUB(long_branch_thumb_only) \
2619 DEF_STUB(long_branch_v4t_thumb_thumb) \
2620 DEF_STUB(long_branch_v4t_thumb_arm) \
2621 DEF_STUB(short_branch_v4t_thumb_arm) \
2622 DEF_STUB(long_branch_any_arm_pic) \
2623 DEF_STUB(long_branch_any_thumb_pic) \
2624 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2625 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2626 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2627 DEF_STUB(long_branch_thumb_only_pic) \
2628 DEF_STUB(long_branch_any_tls_pic) \
2629 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2630 DEF_STUB(long_branch_arm_nacl) \
2631 DEF_STUB(long_branch_arm_nacl_pic) \
2632 DEF_STUB(a8_veneer_b_cond) \
2633 DEF_STUB(a8_veneer_b) \
2634 DEF_STUB(a8_veneer_bl) \
2635 DEF_STUB(a8_veneer_blx) \
2636 DEF_STUB(long_branch_thumb2_only) \
2638 #define DEF_STUB(x) arm_stub_##x,
2639 enum elf32_arm_stub_type
2647 /* Note the first a8_veneer type. */
2648 const unsigned arm_stub_a8_veneer_lwm = arm_stub_a8_veneer_b_cond;
2652 const insn_sequence* template_sequence;
2656 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2657 static const stub_def stub_definitions[] =
2663 struct elf32_arm_stub_hash_entry
2665 /* Base hash table entry structure. */
2666 struct bfd_hash_entry root;
2668 /* The stub section. */
2671 /* Offset within stub_sec of the beginning of this stub. */
2672 bfd_vma stub_offset;
2674 /* Given the symbol's value and its section we can determine its final
2675 value when building the stubs (so the stub knows where to jump). */
2676 bfd_vma target_value;
2677 asection *target_section;
2679 /* Same as above but for the source of the branch to the stub. Used for
2680 Cortex-A8 erratum workaround to patch it to branch to the stub. As
2681 such, source section does not need to be recorded since Cortex-A8 erratum
2682 workaround stubs are only generated when both source and target are in the
2684 bfd_vma source_value;
2686 /* The instruction which caused this stub to be generated (only valid for
2687 Cortex-A8 erratum workaround stubs at present). */
2688 unsigned long orig_insn;
2690 /* The stub type. */
2691 enum elf32_arm_stub_type stub_type;
2692 /* Its encoding size in bytes. */
2695 const insn_sequence *stub_template;
2696 /* The size of the template (number of entries). */
2697 int stub_template_size;
2699 /* The symbol table entry, if any, that this was derived from. */
2700 struct elf32_arm_link_hash_entry *h;
2702 /* Type of branch. */
2703 enum arm_st_branch_type branch_type;
2705 /* Where this stub is being called from, or, in the case of combined
2706 stub sections, the first input section in the group. */
2709 /* The name for the local symbol at the start of this stub. The
2710 stub name in the hash table has to be unique; this does not, so
2711 it can be friendlier. */
2715 /* Used to build a map of a section. This is required for mixed-endian
2718 typedef struct elf32_elf_section_map
2723 elf32_arm_section_map;
2725 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2729 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2730 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2731 VFP11_ERRATUM_ARM_VENEER,
2732 VFP11_ERRATUM_THUMB_VENEER
2734 elf32_vfp11_erratum_type;
2736 typedef struct elf32_vfp11_erratum_list
2738 struct elf32_vfp11_erratum_list *next;
2744 struct elf32_vfp11_erratum_list *veneer;
2745 unsigned int vfp_insn;
2749 struct elf32_vfp11_erratum_list *branch;
2753 elf32_vfp11_erratum_type type;
2755 elf32_vfp11_erratum_list;
2757 /* Information about a STM32L4XX erratum veneer, or a branch to such a
2761 STM32L4XX_ERRATUM_BRANCH_TO_VENEER,
2762 STM32L4XX_ERRATUM_VENEER
2764 elf32_stm32l4xx_erratum_type;
2766 typedef struct elf32_stm32l4xx_erratum_list
2768 struct elf32_stm32l4xx_erratum_list *next;
2774 struct elf32_stm32l4xx_erratum_list *veneer;
2779 struct elf32_stm32l4xx_erratum_list *branch;
2783 elf32_stm32l4xx_erratum_type type;
2785 elf32_stm32l4xx_erratum_list;
2790 INSERT_EXIDX_CANTUNWIND_AT_END
2792 arm_unwind_edit_type;
2794 /* A (sorted) list of edits to apply to an unwind table. */
2795 typedef struct arm_unwind_table_edit
2797 arm_unwind_edit_type type;
2798 /* Note: we sometimes want to insert an unwind entry corresponding to a
2799 section different from the one we're currently writing out, so record the
2800 (text) section this edit relates to here. */
2801 asection *linked_section;
2803 struct arm_unwind_table_edit *next;
2805 arm_unwind_table_edit;
2807 typedef struct _arm_elf_section_data
2809 /* Information about mapping symbols. */
2810 struct bfd_elf_section_data elf;
2811 unsigned int mapcount;
2812 unsigned int mapsize;
2813 elf32_arm_section_map *map;
2814 /* Information about CPU errata. */
2815 unsigned int erratumcount;
2816 elf32_vfp11_erratum_list *erratumlist;
2817 unsigned int stm32l4xx_erratumcount;
2818 elf32_stm32l4xx_erratum_list *stm32l4xx_erratumlist;
2819 unsigned int additional_reloc_count;
2820 /* Information about unwind tables. */
2823 /* Unwind info attached to a text section. */
2826 asection *arm_exidx_sec;
2829 /* Unwind info attached to an .ARM.exidx section. */
2832 arm_unwind_table_edit *unwind_edit_list;
2833 arm_unwind_table_edit *unwind_edit_tail;
2837 _arm_elf_section_data;
2839 #define elf32_arm_section_data(sec) \
2840 ((_arm_elf_section_data *) elf_section_data (sec))
2842 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2843 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2844 so may be created multiple times: we use an array of these entries whilst
2845 relaxing which we can refresh easily, then create stubs for each potentially
2846 erratum-triggering instruction once we've settled on a solution. */
2848 struct a8_erratum_fix
2853 bfd_vma target_offset;
2854 unsigned long orig_insn;
2856 enum elf32_arm_stub_type stub_type;
2857 enum arm_st_branch_type branch_type;
2860 /* A table of relocs applied to branches which might trigger Cortex-A8
2863 struct a8_erratum_reloc
2866 bfd_vma destination;
2867 struct elf32_arm_link_hash_entry *hash;
2868 const char *sym_name;
2869 unsigned int r_type;
2870 enum arm_st_branch_type branch_type;
2871 bfd_boolean non_a8_stub;
2874 /* The size of the thread control block. */
2877 /* ARM-specific information about a PLT entry, over and above the usual
2881 /* We reference count Thumb references to a PLT entry separately,
2882 so that we can emit the Thumb trampoline only if needed. */
2883 bfd_signed_vma thumb_refcount;
2885 /* Some references from Thumb code may be eliminated by BL->BLX
2886 conversion, so record them separately. */
2887 bfd_signed_vma maybe_thumb_refcount;
2889 /* How many of the recorded PLT accesses were from non-call relocations.
2890 This information is useful when deciding whether anything takes the
2891 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2892 non-call references to the function should resolve directly to the
2893 real runtime target. */
2894 unsigned int noncall_refcount;
2896 /* Since PLT entries have variable size if the Thumb prologue is
2897 used, we need to record the index into .got.plt instead of
2898 recomputing it from the PLT offset. */
2899 bfd_signed_vma got_offset;
2902 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2903 struct arm_local_iplt_info
2905 /* The information that is usually found in the generic ELF part of
2906 the hash table entry. */
2907 union gotplt_union root;
2909 /* The information that is usually found in the ARM-specific part of
2910 the hash table entry. */
2911 struct arm_plt_info arm;
2913 /* A list of all potential dynamic relocations against this symbol. */
2914 struct elf_dyn_relocs *dyn_relocs;
2917 struct elf_arm_obj_tdata
2919 struct elf_obj_tdata root;
2921 /* tls_type for each local got entry. */
2922 char *local_got_tls_type;
2924 /* GOTPLT entries for TLS descriptors. */
2925 bfd_vma *local_tlsdesc_gotent;
2927 /* Information for local symbols that need entries in .iplt. */
2928 struct arm_local_iplt_info **local_iplt;
2930 /* Zero to warn when linking objects with incompatible enum sizes. */
2931 int no_enum_size_warning;
2933 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2934 int no_wchar_size_warning;
2937 #define elf_arm_tdata(bfd) \
2938 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2940 #define elf32_arm_local_got_tls_type(bfd) \
2941 (elf_arm_tdata (bfd)->local_got_tls_type)
2943 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2944 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2946 #define elf32_arm_local_iplt(bfd) \
2947 (elf_arm_tdata (bfd)->local_iplt)
2949 #define is_arm_elf(bfd) \
2950 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2951 && elf_tdata (bfd) != NULL \
2952 && elf_object_id (bfd) == ARM_ELF_DATA)
2955 elf32_arm_mkobject (bfd *abfd)
2957 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2961 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2963 /* Arm ELF linker hash entry. */
2964 struct elf32_arm_link_hash_entry
2966 struct elf_link_hash_entry root;
2968 /* Track dynamic relocs copied for this symbol. */
2969 struct elf_dyn_relocs *dyn_relocs;
2971 /* ARM-specific PLT information. */
2972 struct arm_plt_info plt;
2974 #define GOT_UNKNOWN 0
2975 #define GOT_NORMAL 1
2976 #define GOT_TLS_GD 2
2977 #define GOT_TLS_IE 4
2978 #define GOT_TLS_GDESC 8
2979 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
2980 unsigned int tls_type : 8;
2982 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
2983 unsigned int is_iplt : 1;
2985 unsigned int unused : 23;
2987 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
2988 starting at the end of the jump table. */
2989 bfd_vma tlsdesc_got;
2991 /* The symbol marking the real symbol location for exported thumb
2992 symbols with Arm stubs. */
2993 struct elf_link_hash_entry *export_glue;
2995 /* A pointer to the most recently used stub hash entry against this
2997 struct elf32_arm_stub_hash_entry *stub_cache;
3000 /* Traverse an arm ELF linker hash table. */
3001 #define elf32_arm_link_hash_traverse(table, func, info) \
3002 (elf_link_hash_traverse \
3004 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
3007 /* Get the ARM elf linker hash table from a link_info structure. */
3008 #define elf32_arm_hash_table(info) \
3009 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
3010 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
3012 #define arm_stub_hash_lookup(table, string, create, copy) \
3013 ((struct elf32_arm_stub_hash_entry *) \
3014 bfd_hash_lookup ((table), (string), (create), (copy)))
3016 /* Array to keep track of which stub sections have been created, and
3017 information on stub grouping. */
3020 /* This is the section to which stubs in the group will be
3023 /* The stub section. */
3027 #define elf32_arm_compute_jump_table_size(htab) \
3028 ((htab)->next_tls_desc_index * 4)
3030 /* ARM ELF linker hash table. */
3031 struct elf32_arm_link_hash_table
3033 /* The main hash table. */
3034 struct elf_link_hash_table root;
3036 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
3037 bfd_size_type thumb_glue_size;
3039 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
3040 bfd_size_type arm_glue_size;
3042 /* The size in bytes of section containing the ARMv4 BX veneers. */
3043 bfd_size_type bx_glue_size;
3045 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
3046 veneer has been populated. */
3047 bfd_vma bx_glue_offset[15];
3049 /* The size in bytes of the section containing glue for VFP11 erratum
3051 bfd_size_type vfp11_erratum_glue_size;
3053 /* The size in bytes of the section containing glue for STM32L4XX erratum
3055 bfd_size_type stm32l4xx_erratum_glue_size;
3057 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
3058 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
3059 elf32_arm_write_section(). */
3060 struct a8_erratum_fix *a8_erratum_fixes;
3061 unsigned int num_a8_erratum_fixes;
3063 /* An arbitrary input BFD chosen to hold the glue sections. */
3064 bfd * bfd_of_glue_owner;
3066 /* Nonzero to output a BE8 image. */
3069 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
3070 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
3073 /* The relocation to use for R_ARM_TARGET2 relocations. */
3076 /* 0 = Ignore R_ARM_V4BX.
3077 1 = Convert BX to MOV PC.
3078 2 = Generate v4 interworing stubs. */
3081 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
3084 /* Whether we should fix the ARM1176 BLX immediate issue. */
3087 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
3090 /* What sort of code sequences we should look for which may trigger the
3091 VFP11 denorm erratum. */
3092 bfd_arm_vfp11_fix vfp11_fix;
3094 /* Global counter for the number of fixes we have emitted. */
3095 int num_vfp11_fixes;
3097 /* What sort of code sequences we should look for which may trigger the
3098 STM32L4XX erratum. */
3099 bfd_arm_stm32l4xx_fix stm32l4xx_fix;
3101 /* Global counter for the number of fixes we have emitted. */
3102 int num_stm32l4xx_fixes;
3104 /* Nonzero to force PIC branch veneers. */
3107 /* The number of bytes in the initial entry in the PLT. */
3108 bfd_size_type plt_header_size;
3110 /* The number of bytes in the subsequent PLT etries. */
3111 bfd_size_type plt_entry_size;
3113 /* True if the target system is VxWorks. */
3116 /* True if the target system is Symbian OS. */
3119 /* True if the target system is Native Client. */
3122 /* True if the target uses REL relocations. */
3125 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
3126 bfd_vma next_tls_desc_index;
3128 /* How many R_ARM_TLS_DESC relocations were generated so far. */
3129 bfd_vma num_tls_desc;
3131 /* Short-cuts to get to dynamic linker sections. */
3135 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
3138 /* The offset into splt of the PLT entry for the TLS descriptor
3139 resolver. Special values are 0, if not necessary (or not found
3140 to be necessary yet), and -1 if needed but not determined
3142 bfd_vma dt_tlsdesc_plt;
3144 /* The offset into sgot of the GOT entry used by the PLT entry
3146 bfd_vma dt_tlsdesc_got;
3148 /* Offset in .plt section of tls_arm_trampoline. */
3149 bfd_vma tls_trampoline;
3151 /* Data for R_ARM_TLS_LDM32 relocations. */
3154 bfd_signed_vma refcount;
3158 /* Small local sym cache. */
3159 struct sym_cache sym_cache;
3161 /* For convenience in allocate_dynrelocs. */
3164 /* The amount of space used by the reserved portion of the sgotplt
3165 section, plus whatever space is used by the jump slots. */
3166 bfd_vma sgotplt_jump_table_size;
3168 /* The stub hash table. */
3169 struct bfd_hash_table stub_hash_table;
3171 /* Linker stub bfd. */
3174 /* Linker call-backs. */
3175 asection * (*add_stub_section) (const char *, asection *, asection *,
3177 void (*layout_sections_again) (void);
3179 /* Array to keep track of which stub sections have been created, and
3180 information on stub grouping. */
3181 struct map_stub *stub_group;
3183 /* Number of elements in stub_group. */
3184 unsigned int top_id;
3186 /* Assorted information used by elf32_arm_size_stubs. */
3187 unsigned int bfd_count;
3188 unsigned int top_index;
3189 asection **input_list;
3193 ctz (unsigned int mask)
3195 #if GCC_VERSION >= 3004
3196 return __builtin_ctz (mask);
3200 for (i = 0; i < 8 * sizeof (mask); i++)
3211 popcount (unsigned int mask)
3213 #if GCC_VERSION >= 3004
3214 return __builtin_popcount (mask);
3216 unsigned int i, sum = 0;
3218 for (i = 0; i < 8 * sizeof (mask); i++)
3228 /* Create an entry in an ARM ELF linker hash table. */
3230 static struct bfd_hash_entry *
3231 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
3232 struct bfd_hash_table * table,
3233 const char * string)
3235 struct elf32_arm_link_hash_entry * ret =
3236 (struct elf32_arm_link_hash_entry *) entry;
3238 /* Allocate the structure if it has not already been allocated by a
3241 ret = (struct elf32_arm_link_hash_entry *)
3242 bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
3244 return (struct bfd_hash_entry *) ret;
3246 /* Call the allocation method of the superclass. */
3247 ret = ((struct elf32_arm_link_hash_entry *)
3248 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3252 ret->dyn_relocs = NULL;
3253 ret->tls_type = GOT_UNKNOWN;
3254 ret->tlsdesc_got = (bfd_vma) -1;
3255 ret->plt.thumb_refcount = 0;
3256 ret->plt.maybe_thumb_refcount = 0;
3257 ret->plt.noncall_refcount = 0;
3258 ret->plt.got_offset = -1;
3259 ret->is_iplt = FALSE;
3260 ret->export_glue = NULL;
3262 ret->stub_cache = NULL;
3265 return (struct bfd_hash_entry *) ret;
3268 /* Ensure that we have allocated bookkeeping structures for ABFD's local
3272 elf32_arm_allocate_local_sym_info (bfd *abfd)
3274 if (elf_local_got_refcounts (abfd) == NULL)
3276 bfd_size_type num_syms;
3280 num_syms = elf_tdata (abfd)->symtab_hdr.sh_info;
3281 size = num_syms * (sizeof (bfd_signed_vma)
3282 + sizeof (struct arm_local_iplt_info *)
3285 data = bfd_zalloc (abfd, size);
3289 elf_local_got_refcounts (abfd) = (bfd_signed_vma *) data;
3290 data += num_syms * sizeof (bfd_signed_vma);
3292 elf32_arm_local_iplt (abfd) = (struct arm_local_iplt_info **) data;
3293 data += num_syms * sizeof (struct arm_local_iplt_info *);
3295 elf32_arm_local_tlsdesc_gotent (abfd) = (bfd_vma *) data;
3296 data += num_syms * sizeof (bfd_vma);
3298 elf32_arm_local_got_tls_type (abfd) = data;
3303 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
3304 to input bfd ABFD. Create the information if it doesn't already exist.
3305 Return null if an allocation fails. */
3307 static struct arm_local_iplt_info *
3308 elf32_arm_create_local_iplt (bfd *abfd, unsigned long r_symndx)
3310 struct arm_local_iplt_info **ptr;
3312 if (!elf32_arm_allocate_local_sym_info (abfd))
3315 BFD_ASSERT (r_symndx < elf_tdata (abfd)->symtab_hdr.sh_info);
3316 ptr = &elf32_arm_local_iplt (abfd)[r_symndx];
3318 *ptr = bfd_zalloc (abfd, sizeof (**ptr));
3322 /* Try to obtain PLT information for the symbol with index R_SYMNDX
3323 in ABFD's symbol table. If the symbol is global, H points to its
3324 hash table entry, otherwise H is null.
3326 Return true if the symbol does have PLT information. When returning
3327 true, point *ROOT_PLT at the target-independent reference count/offset
3328 union and *ARM_PLT at the ARM-specific information. */
3331 elf32_arm_get_plt_info (bfd *abfd, struct elf32_arm_link_hash_entry *h,
3332 unsigned long r_symndx, union gotplt_union **root_plt,
3333 struct arm_plt_info **arm_plt)
3335 struct arm_local_iplt_info *local_iplt;
3339 *root_plt = &h->root.plt;
3344 if (elf32_arm_local_iplt (abfd) == NULL)
3347 local_iplt = elf32_arm_local_iplt (abfd)[r_symndx];
3348 if (local_iplt == NULL)
3351 *root_plt = &local_iplt->root;
3352 *arm_plt = &local_iplt->arm;
3356 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3360 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info *info,
3361 struct arm_plt_info *arm_plt)
3363 struct elf32_arm_link_hash_table *htab;
3365 htab = elf32_arm_hash_table (info);
3366 return (arm_plt->thumb_refcount != 0
3367 || (!htab->use_blx && arm_plt->maybe_thumb_refcount != 0));
3370 /* Return a pointer to the head of the dynamic reloc list that should
3371 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3372 ABFD's symbol table. Return null if an error occurs. */
3374 static struct elf_dyn_relocs **
3375 elf32_arm_get_local_dynreloc_list (bfd *abfd, unsigned long r_symndx,
3376 Elf_Internal_Sym *isym)
3378 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3380 struct arm_local_iplt_info *local_iplt;
3382 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
3383 if (local_iplt == NULL)
3385 return &local_iplt->dyn_relocs;
3389 /* Track dynamic relocs needed for local syms too.
3390 We really need local syms available to do this
3395 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3399 vpp = &elf_section_data (s)->local_dynrel;
3400 return (struct elf_dyn_relocs **) vpp;
3404 /* Initialize an entry in the stub hash table. */
3406 static struct bfd_hash_entry *
3407 stub_hash_newfunc (struct bfd_hash_entry *entry,
3408 struct bfd_hash_table *table,
3411 /* Allocate the structure if it has not already been allocated by a
3415 entry = (struct bfd_hash_entry *)
3416 bfd_hash_allocate (table, sizeof (struct elf32_arm_stub_hash_entry));
3421 /* Call the allocation method of the superclass. */
3422 entry = bfd_hash_newfunc (entry, table, string);
3425 struct elf32_arm_stub_hash_entry *eh;
3427 /* Initialize the local fields. */
3428 eh = (struct elf32_arm_stub_hash_entry *) entry;
3429 eh->stub_sec = NULL;
3430 eh->stub_offset = 0;
3431 eh->source_value = 0;
3432 eh->target_value = 0;
3433 eh->target_section = NULL;
3435 eh->stub_type = arm_stub_none;
3437 eh->stub_template = NULL;
3438 eh->stub_template_size = 0;
3441 eh->output_name = NULL;
3447 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3448 shortcuts to them in our hash table. */
3451 create_got_section (bfd *dynobj, struct bfd_link_info *info)
3453 struct elf32_arm_link_hash_table *htab;
3455 htab = elf32_arm_hash_table (info);
3459 /* BPABI objects never have a GOT, or associated sections. */
3460 if (htab->symbian_p)
3463 if (! _bfd_elf_create_got_section (dynobj, info))
3469 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3472 create_ifunc_sections (struct bfd_link_info *info)
3474 struct elf32_arm_link_hash_table *htab;
3475 const struct elf_backend_data *bed;
3480 htab = elf32_arm_hash_table (info);
3481 dynobj = htab->root.dynobj;
3482 bed = get_elf_backend_data (dynobj);
3483 flags = bed->dynamic_sec_flags;
3485 if (htab->root.iplt == NULL)
3487 s = bfd_make_section_anyway_with_flags (dynobj, ".iplt",
3488 flags | SEC_READONLY | SEC_CODE);
3490 || !bfd_set_section_alignment (dynobj, s, bed->plt_alignment))
3492 htab->root.iplt = s;
3495 if (htab->root.irelplt == NULL)
3497 s = bfd_make_section_anyway_with_flags (dynobj,
3498 RELOC_SECTION (htab, ".iplt"),
3499 flags | SEC_READONLY);
3501 || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
3503 htab->root.irelplt = s;
3506 if (htab->root.igotplt == NULL)
3508 s = bfd_make_section_anyway_with_flags (dynobj, ".igot.plt", flags);
3510 || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
3512 htab->root.igotplt = s;
3517 /* Determine if we're dealing with a Thumb only architecture. */
3520 using_thumb_only (struct elf32_arm_link_hash_table *globals)
3523 int profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3524 Tag_CPU_arch_profile);
3527 return profile == 'M';
3529 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3531 /* Force return logic to be reviewed for each new architecture. */
3532 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3533 || arch == TAG_CPU_ARCH_V8M_BASE
3534 || arch == TAG_CPU_ARCH_V8M_MAIN);
3536 if (arch == TAG_CPU_ARCH_V6_M
3537 || arch == TAG_CPU_ARCH_V6S_M
3538 || arch == TAG_CPU_ARCH_V7E_M
3539 || arch == TAG_CPU_ARCH_V8M_BASE
3540 || arch == TAG_CPU_ARCH_V8M_MAIN)
3546 /* Determine if we're dealing with a Thumb-2 object. */
3549 using_thumb2 (struct elf32_arm_link_hash_table *globals)
3552 int thumb_isa = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3556 return thumb_isa == 2;
3558 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3560 /* Force return logic to be reviewed for each new architecture. */
3561 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3562 || arch == TAG_CPU_ARCH_V8M_BASE
3563 || arch == TAG_CPU_ARCH_V8M_MAIN);
3565 return (arch == TAG_CPU_ARCH_V6T2
3566 || arch == TAG_CPU_ARCH_V7
3567 || arch == TAG_CPU_ARCH_V7E_M
3568 || arch == TAG_CPU_ARCH_V8
3569 || arch == TAG_CPU_ARCH_V8M_MAIN);
3572 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3573 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3577 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3579 struct elf32_arm_link_hash_table *htab;
3581 htab = elf32_arm_hash_table (info);
3585 if (!htab->root.sgot && !create_got_section (dynobj, info))
3588 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3591 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
3592 if (!bfd_link_pic (info))
3593 htab->srelbss = bfd_get_linker_section (dynobj,
3594 RELOC_SECTION (htab, ".bss"));
3596 if (htab->vxworks_p)
3598 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
3601 if (bfd_link_pic (info))
3603 htab->plt_header_size = 0;
3604 htab->plt_entry_size
3605 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
3609 htab->plt_header_size
3610 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
3611 htab->plt_entry_size
3612 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
3615 if (elf_elfheader (dynobj))
3616 elf_elfheader (dynobj)->e_ident[EI_CLASS] = ELFCLASS32;
3621 Test for thumb only architectures. Note - we cannot just call
3622 using_thumb_only() as the attributes in the output bfd have not been
3623 initialised at this point, so instead we use the input bfd. */
3624 bfd * saved_obfd = htab->obfd;
3626 htab->obfd = dynobj;
3627 if (using_thumb_only (htab))
3629 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
3630 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
3632 htab->obfd = saved_obfd;
3635 if (!htab->root.splt
3636 || !htab->root.srelplt
3638 || (!bfd_link_pic (info) && !htab->srelbss))
3644 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3647 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
3648 struct elf_link_hash_entry *dir,
3649 struct elf_link_hash_entry *ind)
3651 struct elf32_arm_link_hash_entry *edir, *eind;
3653 edir = (struct elf32_arm_link_hash_entry *) dir;
3654 eind = (struct elf32_arm_link_hash_entry *) ind;
3656 if (eind->dyn_relocs != NULL)
3658 if (edir->dyn_relocs != NULL)
3660 struct elf_dyn_relocs **pp;
3661 struct elf_dyn_relocs *p;
3663 /* Add reloc counts against the indirect sym to the direct sym
3664 list. Merge any entries against the same section. */
3665 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3667 struct elf_dyn_relocs *q;
3669 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3670 if (q->sec == p->sec)
3672 q->pc_count += p->pc_count;
3673 q->count += p->count;
3680 *pp = edir->dyn_relocs;
3683 edir->dyn_relocs = eind->dyn_relocs;
3684 eind->dyn_relocs = NULL;
3687 if (ind->root.type == bfd_link_hash_indirect)
3689 /* Copy over PLT info. */
3690 edir->plt.thumb_refcount += eind->plt.thumb_refcount;
3691 eind->plt.thumb_refcount = 0;
3692 edir->plt.maybe_thumb_refcount += eind->plt.maybe_thumb_refcount;
3693 eind->plt.maybe_thumb_refcount = 0;
3694 edir->plt.noncall_refcount += eind->plt.noncall_refcount;
3695 eind->plt.noncall_refcount = 0;
3697 /* We should only allocate a function to .iplt once the final
3698 symbol information is known. */
3699 BFD_ASSERT (!eind->is_iplt);
3701 if (dir->got.refcount <= 0)
3703 edir->tls_type = eind->tls_type;
3704 eind->tls_type = GOT_UNKNOWN;
3708 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3711 /* Destroy an ARM elf linker hash table. */
3714 elf32_arm_link_hash_table_free (bfd *obfd)
3716 struct elf32_arm_link_hash_table *ret
3717 = (struct elf32_arm_link_hash_table *) obfd->link.hash;
3719 bfd_hash_table_free (&ret->stub_hash_table);
3720 _bfd_elf_link_hash_table_free (obfd);
3723 /* Create an ARM elf linker hash table. */
3725 static struct bfd_link_hash_table *
3726 elf32_arm_link_hash_table_create (bfd *abfd)
3728 struct elf32_arm_link_hash_table *ret;
3729 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
3731 ret = (struct elf32_arm_link_hash_table *) bfd_zmalloc (amt);
3735 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
3736 elf32_arm_link_hash_newfunc,
3737 sizeof (struct elf32_arm_link_hash_entry),
3744 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3745 ret->stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
3746 #ifdef FOUR_WORD_PLT
3747 ret->plt_header_size = 16;
3748 ret->plt_entry_size = 16;
3750 ret->plt_header_size = 20;
3751 ret->plt_entry_size = elf32_arm_use_long_plt_entry ? 16 : 12;
3756 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
3757 sizeof (struct elf32_arm_stub_hash_entry)))
3759 _bfd_elf_link_hash_table_free (abfd);
3762 ret->root.root.hash_table_free = elf32_arm_link_hash_table_free;
3764 return &ret->root.root;
3767 /* Determine what kind of NOPs are available. */
3770 arch_has_arm_nop (struct elf32_arm_link_hash_table *globals)
3772 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3775 /* Force return logic to be reviewed for each new architecture. */
3776 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8
3777 || arch == TAG_CPU_ARCH_V8M_BASE
3778 || arch == TAG_CPU_ARCH_V8M_MAIN);
3780 return (arch == TAG_CPU_ARCH_V6T2
3781 || arch == TAG_CPU_ARCH_V6K
3782 || arch == TAG_CPU_ARCH_V7
3783 || arch == TAG_CPU_ARCH_V8);
3787 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
3791 case arm_stub_long_branch_thumb_only:
3792 case arm_stub_long_branch_thumb2_only:
3793 case arm_stub_long_branch_v4t_thumb_arm:
3794 case arm_stub_short_branch_v4t_thumb_arm:
3795 case arm_stub_long_branch_v4t_thumb_arm_pic:
3796 case arm_stub_long_branch_v4t_thumb_tls_pic:
3797 case arm_stub_long_branch_thumb_only_pic:
3808 /* Determine the type of stub needed, if any, for a call. */
3810 static enum elf32_arm_stub_type
3811 arm_type_of_stub (struct bfd_link_info *info,
3812 asection *input_sec,
3813 const Elf_Internal_Rela *rel,
3814 unsigned char st_type,
3815 enum arm_st_branch_type *actual_branch_type,
3816 struct elf32_arm_link_hash_entry *hash,
3817 bfd_vma destination,
3823 bfd_signed_vma branch_offset;
3824 unsigned int r_type;
3825 struct elf32_arm_link_hash_table * globals;
3828 enum elf32_arm_stub_type stub_type = arm_stub_none;
3830 enum arm_st_branch_type branch_type = *actual_branch_type;
3831 union gotplt_union *root_plt;
3832 struct arm_plt_info *arm_plt;
3834 if (branch_type == ST_BRANCH_LONG)
3837 globals = elf32_arm_hash_table (info);
3838 if (globals == NULL)
3841 thumb_only = using_thumb_only (globals);
3843 thumb2 = using_thumb2 (globals);
3845 /* Determine where the call point is. */
3846 location = (input_sec->output_offset
3847 + input_sec->output_section->vma
3850 r_type = ELF32_R_TYPE (rel->r_info);
3852 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
3853 are considering a function call relocation. */
3854 if (thumb_only && (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3855 || r_type == R_ARM_THM_JUMP19)
3856 && branch_type == ST_BRANCH_TO_ARM)
3857 branch_type = ST_BRANCH_TO_THUMB;
3859 /* For TLS call relocs, it is the caller's responsibility to provide
3860 the address of the appropriate trampoline. */
3861 if (r_type != R_ARM_TLS_CALL
3862 && r_type != R_ARM_THM_TLS_CALL
3863 && elf32_arm_get_plt_info (input_bfd, hash, ELF32_R_SYM (rel->r_info),
3864 &root_plt, &arm_plt)
3865 && root_plt->offset != (bfd_vma) -1)
3869 if (hash == NULL || hash->is_iplt)
3870 splt = globals->root.iplt;
3872 splt = globals->root.splt;
3877 /* Note when dealing with PLT entries: the main PLT stub is in
3878 ARM mode, so if the branch is in Thumb mode, another
3879 Thumb->ARM stub will be inserted later just before the ARM
3880 PLT stub. We don't take this extra distance into account
3881 here, because if a long branch stub is needed, we'll add a
3882 Thumb->Arm one and branch directly to the ARM PLT entry
3883 because it avoids spreading offset corrections in several
3886 destination = (splt->output_section->vma
3887 + splt->output_offset
3888 + root_plt->offset);
3890 branch_type = ST_BRANCH_TO_ARM;
3893 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3894 BFD_ASSERT (st_type != STT_GNU_IFUNC);
3896 branch_offset = (bfd_signed_vma)(destination - location);
3898 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3899 || r_type == R_ARM_THM_TLS_CALL || r_type == R_ARM_THM_JUMP19)
3901 /* Handle cases where:
3902 - this call goes too far (different Thumb/Thumb2 max
3904 - it's a Thumb->Arm call and blx is not available, or it's a
3905 Thumb->Arm branch (not bl). A stub is needed in this case,
3906 but only if this call is not through a PLT entry. Indeed,
3907 PLT stubs handle mode switching already.
3910 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
3911 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
3913 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
3914 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
3916 && (branch_offset > THM2_MAX_FWD_COND_BRANCH_OFFSET
3917 || (branch_offset < THM2_MAX_BWD_COND_BRANCH_OFFSET))
3918 && (r_type == R_ARM_THM_JUMP19))
3919 || (branch_type == ST_BRANCH_TO_ARM
3920 && (((r_type == R_ARM_THM_CALL
3921 || r_type == R_ARM_THM_TLS_CALL) && !globals->use_blx)
3922 || (r_type == R_ARM_THM_JUMP24)
3923 || (r_type == R_ARM_THM_JUMP19))
3926 if (branch_type == ST_BRANCH_TO_THUMB)
3928 /* Thumb to thumb. */
3931 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
3933 ? ((globals->use_blx
3934 && (r_type == R_ARM_THM_CALL))
3935 /* V5T and above. Stub starts with ARM code, so
3936 we must be able to switch mode before
3937 reaching it, which is only possible for 'bl'
3938 (ie R_ARM_THM_CALL relocation). */
3939 ? arm_stub_long_branch_any_thumb_pic
3940 /* On V4T, use Thumb code only. */
3941 : arm_stub_long_branch_v4t_thumb_thumb_pic)
3943 /* non-PIC stubs. */
3944 : ((globals->use_blx
3945 && (r_type == R_ARM_THM_CALL))
3946 /* V5T and above. */
3947 ? arm_stub_long_branch_any_any
3949 : arm_stub_long_branch_v4t_thumb_thumb);
3953 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
3955 ? arm_stub_long_branch_thumb_only_pic
3957 : (thumb2 ? arm_stub_long_branch_thumb2_only
3958 : arm_stub_long_branch_thumb_only);
3965 && sym_sec->owner != NULL
3966 && !INTERWORK_FLAG (sym_sec->owner))
3968 (*_bfd_error_handler)
3969 (_("%B(%s): warning: interworking not enabled.\n"
3970 " first occurrence: %B: Thumb call to ARM"),
3971 sym_sec->owner, input_bfd, name);
3975 (bfd_link_pic (info) | globals->pic_veneer)
3977 ? (r_type == R_ARM_THM_TLS_CALL
3978 /* TLS PIC stubs. */
3979 ? (globals->use_blx ? arm_stub_long_branch_any_tls_pic
3980 : arm_stub_long_branch_v4t_thumb_tls_pic)
3981 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
3982 /* V5T PIC and above. */
3983 ? arm_stub_long_branch_any_arm_pic
3985 : arm_stub_long_branch_v4t_thumb_arm_pic))
3987 /* non-PIC stubs. */
3988 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
3989 /* V5T and above. */
3990 ? arm_stub_long_branch_any_any
3992 : arm_stub_long_branch_v4t_thumb_arm);
3994 /* Handle v4t short branches. */
3995 if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
3996 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
3997 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
3998 stub_type = arm_stub_short_branch_v4t_thumb_arm;
4002 else if (r_type == R_ARM_CALL
4003 || r_type == R_ARM_JUMP24
4004 || r_type == R_ARM_PLT32
4005 || r_type == R_ARM_TLS_CALL)
4007 if (branch_type == ST_BRANCH_TO_THUMB)
4012 && sym_sec->owner != NULL
4013 && !INTERWORK_FLAG (sym_sec->owner))
4015 (*_bfd_error_handler)
4016 (_("%B(%s): warning: interworking not enabled.\n"
4017 " first occurrence: %B: ARM call to Thumb"),
4018 sym_sec->owner, input_bfd, name);
4021 /* We have an extra 2-bytes reach because of
4022 the mode change (bit 24 (H) of BLX encoding). */
4023 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
4024 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
4025 || (r_type == R_ARM_CALL && !globals->use_blx)
4026 || (r_type == R_ARM_JUMP24)
4027 || (r_type == R_ARM_PLT32))
4029 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
4031 ? ((globals->use_blx)
4032 /* V5T and above. */
4033 ? arm_stub_long_branch_any_thumb_pic
4035 : arm_stub_long_branch_v4t_arm_thumb_pic)
4037 /* non-PIC stubs. */
4038 : ((globals->use_blx)
4039 /* V5T and above. */
4040 ? arm_stub_long_branch_any_any
4042 : arm_stub_long_branch_v4t_arm_thumb);
4048 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
4049 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
4052 (bfd_link_pic (info) | globals->pic_veneer)
4054 ? (r_type == R_ARM_TLS_CALL
4056 ? arm_stub_long_branch_any_tls_pic
4058 ? arm_stub_long_branch_arm_nacl_pic
4059 : arm_stub_long_branch_any_arm_pic))
4060 /* non-PIC stubs. */
4062 ? arm_stub_long_branch_arm_nacl
4063 : arm_stub_long_branch_any_any);
4068 /* If a stub is needed, record the actual destination type. */
4069 if (stub_type != arm_stub_none)
4070 *actual_branch_type = branch_type;
4075 /* Build a name for an entry in the stub hash table. */
4078 elf32_arm_stub_name (const asection *input_section,
4079 const asection *sym_sec,
4080 const struct elf32_arm_link_hash_entry *hash,
4081 const Elf_Internal_Rela *rel,
4082 enum elf32_arm_stub_type stub_type)
4089 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1 + 2 + 1;
4090 stub_name = (char *) bfd_malloc (len);
4091 if (stub_name != NULL)
4092 sprintf (stub_name, "%08x_%s+%x_%d",
4093 input_section->id & 0xffffffff,
4094 hash->root.root.root.string,
4095 (int) rel->r_addend & 0xffffffff,
4100 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
4101 stub_name = (char *) bfd_malloc (len);
4102 if (stub_name != NULL)
4103 sprintf (stub_name, "%08x_%x:%x+%x_%d",
4104 input_section->id & 0xffffffff,
4105 sym_sec->id & 0xffffffff,
4106 ELF32_R_TYPE (rel->r_info) == R_ARM_TLS_CALL
4107 || ELF32_R_TYPE (rel->r_info) == R_ARM_THM_TLS_CALL
4108 ? 0 : (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
4109 (int) rel->r_addend & 0xffffffff,
4116 /* Look up an entry in the stub hash. Stub entries are cached because
4117 creating the stub name takes a bit of time. */
4119 static struct elf32_arm_stub_hash_entry *
4120 elf32_arm_get_stub_entry (const asection *input_section,
4121 const asection *sym_sec,
4122 struct elf_link_hash_entry *hash,
4123 const Elf_Internal_Rela *rel,
4124 struct elf32_arm_link_hash_table *htab,
4125 enum elf32_arm_stub_type stub_type)
4127 struct elf32_arm_stub_hash_entry *stub_entry;
4128 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
4129 const asection *id_sec;
4131 if ((input_section->flags & SEC_CODE) == 0)
4134 /* If this input section is part of a group of sections sharing one
4135 stub section, then use the id of the first section in the group.
4136 Stub names need to include a section id, as there may well be
4137 more than one stub used to reach say, printf, and we need to
4138 distinguish between them. */
4139 id_sec = htab->stub_group[input_section->id].link_sec;
4141 if (h != NULL && h->stub_cache != NULL
4142 && h->stub_cache->h == h
4143 && h->stub_cache->id_sec == id_sec
4144 && h->stub_cache->stub_type == stub_type)
4146 stub_entry = h->stub_cache;
4152 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel, stub_type);
4153 if (stub_name == NULL)
4156 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
4157 stub_name, FALSE, FALSE);
4159 h->stub_cache = stub_entry;
4167 /* Whether veneers of type STUB_TYPE require to be in a dedicated output
4171 arm_dedicated_stub_output_section_required (enum elf32_arm_stub_type stub_type)
4173 if (stub_type >= max_stub_type)
4174 abort (); /* Should be unreachable. */
4179 /* Required alignment (as a power of 2) for the dedicated section holding
4180 veneers of type STUB_TYPE, or 0 if veneers of this type are interspersed
4181 with input sections. */
4184 arm_dedicated_stub_output_section_required_alignment
4185 (enum elf32_arm_stub_type stub_type)
4187 if (stub_type >= max_stub_type)
4188 abort (); /* Should be unreachable. */
4190 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4194 /* Name of the dedicated output section to put veneers of type STUB_TYPE, or
4195 NULL if veneers of this type are interspersed with input sections. */
4198 arm_dedicated_stub_output_section_name (enum elf32_arm_stub_type stub_type)
4200 if (stub_type >= max_stub_type)
4201 abort (); /* Should be unreachable. */
4203 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4207 /* If veneers of type STUB_TYPE should go in a dedicated output section,
4208 returns the address of the hash table field in HTAB holding a pointer to the
4209 corresponding input section. Otherwise, returns NULL. */
4212 arm_dedicated_stub_input_section_ptr
4213 (struct elf32_arm_link_hash_table *htab ATTRIBUTE_UNUSED,
4214 enum elf32_arm_stub_type stub_type)
4216 if (stub_type >= max_stub_type)
4217 abort (); /* Should be unreachable. */
4219 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4223 /* Find or create a stub section to contain a stub of type STUB_TYPE. SECTION
4224 is the section that branch into veneer and can be NULL if stub should go in
4225 a dedicated output section. Returns a pointer to the stub section, and the
4226 section to which the stub section will be attached (in *LINK_SEC_P).
4227 LINK_SEC_P may be NULL. */
4230 elf32_arm_create_or_find_stub_sec (asection **link_sec_p, asection *section,
4231 struct elf32_arm_link_hash_table *htab,
4232 enum elf32_arm_stub_type stub_type)
4234 asection *link_sec, *out_sec, **stub_sec_p;
4235 const char *stub_sec_prefix;
4236 bfd_boolean dedicated_output_section =
4237 arm_dedicated_stub_output_section_required (stub_type);
4240 if (dedicated_output_section)
4242 bfd *output_bfd = htab->obfd;
4243 const char *out_sec_name =
4244 arm_dedicated_stub_output_section_name (stub_type);
4246 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
4247 stub_sec_prefix = out_sec_name;
4248 align = arm_dedicated_stub_output_section_required_alignment (stub_type);
4249 out_sec = bfd_get_section_by_name (output_bfd, out_sec_name);
4250 if (out_sec == NULL)
4252 (*_bfd_error_handler) (_("No address assigned to the veneers output "
4253 "section %s"), out_sec_name);
4259 link_sec = htab->stub_group[section->id].link_sec;
4260 BFD_ASSERT (link_sec != NULL);
4261 stub_sec_p = &htab->stub_group[section->id].stub_sec;
4262 if (*stub_sec_p == NULL)
4263 stub_sec_p = &htab->stub_group[link_sec->id].stub_sec;
4264 stub_sec_prefix = link_sec->name;
4265 out_sec = link_sec->output_section;
4266 align = htab->nacl_p ? 4 : 3;
4269 if (*stub_sec_p == NULL)
4275 namelen = strlen (stub_sec_prefix);
4276 len = namelen + sizeof (STUB_SUFFIX);
4277 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
4281 memcpy (s_name, stub_sec_prefix, namelen);
4282 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4283 *stub_sec_p = (*htab->add_stub_section) (s_name, out_sec, link_sec,
4285 if (*stub_sec_p == NULL)
4288 out_sec->flags |= SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
4289 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY
4293 if (!dedicated_output_section)
4294 htab->stub_group[section->id].stub_sec = *stub_sec_p;
4297 *link_sec_p = link_sec;
4302 /* Add a new stub entry to the stub hash. Not all fields of the new
4303 stub entry are initialised. */
4305 static struct elf32_arm_stub_hash_entry *
4306 elf32_arm_add_stub (const char *stub_name, asection *section,
4307 struct elf32_arm_link_hash_table *htab,
4308 enum elf32_arm_stub_type stub_type)
4312 struct elf32_arm_stub_hash_entry *stub_entry;
4314 stub_sec = elf32_arm_create_or_find_stub_sec (&link_sec, section, htab,
4316 if (stub_sec == NULL)
4319 /* Enter this entry into the linker stub hash table. */
4320 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4322 if (stub_entry == NULL)
4324 if (section == NULL)
4326 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
4332 stub_entry->stub_sec = stub_sec;
4333 stub_entry->stub_offset = 0;
4334 stub_entry->id_sec = link_sec;
4339 /* Store an Arm insn into an output section not processed by
4340 elf32_arm_write_section. */
4343 put_arm_insn (struct elf32_arm_link_hash_table * htab,
4344 bfd * output_bfd, bfd_vma val, void * ptr)
4346 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4347 bfd_putl32 (val, ptr);
4349 bfd_putb32 (val, ptr);
4352 /* Store a 16-bit Thumb insn into an output section not processed by
4353 elf32_arm_write_section. */
4356 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
4357 bfd * output_bfd, bfd_vma val, void * ptr)
4359 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4360 bfd_putl16 (val, ptr);
4362 bfd_putb16 (val, ptr);
4365 /* Store a Thumb2 insn into an output section not processed by
4366 elf32_arm_write_section. */
4369 put_thumb2_insn (struct elf32_arm_link_hash_table * htab,
4370 bfd * output_bfd, bfd_vma val, bfd_byte * ptr)
4372 /* T2 instructions are 16-bit streamed. */
4373 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4375 bfd_putl16 ((val >> 16) & 0xffff, ptr);
4376 bfd_putl16 ((val & 0xffff), ptr + 2);
4380 bfd_putb16 ((val >> 16) & 0xffff, ptr);
4381 bfd_putb16 ((val & 0xffff), ptr + 2);
4385 /* If it's possible to change R_TYPE to a more efficient access
4386 model, return the new reloc type. */
4389 elf32_arm_tls_transition (struct bfd_link_info *info, int r_type,
4390 struct elf_link_hash_entry *h)
4392 int is_local = (h == NULL);
4394 if (bfd_link_pic (info)
4395 || (h && h->root.type == bfd_link_hash_undefweak))
4398 /* We do not support relaxations for Old TLS models. */
4401 case R_ARM_TLS_GOTDESC:
4402 case R_ARM_TLS_CALL:
4403 case R_ARM_THM_TLS_CALL:
4404 case R_ARM_TLS_DESCSEQ:
4405 case R_ARM_THM_TLS_DESCSEQ:
4406 return is_local ? R_ARM_TLS_LE32 : R_ARM_TLS_IE32;
4412 static bfd_reloc_status_type elf32_arm_final_link_relocate
4413 (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
4414 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
4415 const char *, unsigned char, enum arm_st_branch_type,
4416 struct elf_link_hash_entry *, bfd_boolean *, char **);
4419 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type)
4423 case arm_stub_a8_veneer_b_cond:
4424 case arm_stub_a8_veneer_b:
4425 case arm_stub_a8_veneer_bl:
4428 case arm_stub_long_branch_any_any:
4429 case arm_stub_long_branch_v4t_arm_thumb:
4430 case arm_stub_long_branch_thumb_only:
4431 case arm_stub_long_branch_thumb2_only:
4432 case arm_stub_long_branch_v4t_thumb_thumb:
4433 case arm_stub_long_branch_v4t_thumb_arm:
4434 case arm_stub_short_branch_v4t_thumb_arm:
4435 case arm_stub_long_branch_any_arm_pic:
4436 case arm_stub_long_branch_any_thumb_pic:
4437 case arm_stub_long_branch_v4t_thumb_thumb_pic:
4438 case arm_stub_long_branch_v4t_arm_thumb_pic:
4439 case arm_stub_long_branch_v4t_thumb_arm_pic:
4440 case arm_stub_long_branch_thumb_only_pic:
4441 case arm_stub_long_branch_any_tls_pic:
4442 case arm_stub_long_branch_v4t_thumb_tls_pic:
4443 case arm_stub_a8_veneer_blx:
4446 case arm_stub_long_branch_arm_nacl:
4447 case arm_stub_long_branch_arm_nacl_pic:
4451 abort (); /* Should be unreachable. */
4455 /* Returns whether stubs of type STUB_TYPE take over the symbol they are
4456 veneering (TRUE) or have their own symbol (FALSE). */
4459 arm_stub_sym_claimed (enum elf32_arm_stub_type stub_type)
4461 if (stub_type >= max_stub_type)
4462 abort (); /* Should be unreachable. */
4467 /* Returns the padding needed for the dedicated section used stubs of type
4471 arm_dedicated_stub_section_padding (enum elf32_arm_stub_type stub_type)
4473 if (stub_type >= max_stub_type)
4474 abort (); /* Should be unreachable. */
4480 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
4484 struct elf32_arm_stub_hash_entry *stub_entry;
4485 struct elf32_arm_link_hash_table *globals;
4486 struct bfd_link_info *info;
4493 const insn_sequence *template_sequence;
4495 int stub_reloc_idx[MAXRELOCS] = {-1, -1};
4496 int stub_reloc_offset[MAXRELOCS] = {0, 0};
4499 /* Massage our args to the form they really have. */
4500 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
4501 info = (struct bfd_link_info *) in_arg;
4503 globals = elf32_arm_hash_table (info);
4504 if (globals == NULL)
4507 stub_sec = stub_entry->stub_sec;
4509 if ((globals->fix_cortex_a8 < 0)
4510 != (arm_stub_required_alignment (stub_entry->stub_type) == 2))
4511 /* We have to do less-strictly-aligned fixes last. */
4514 /* Make a note of the offset within the stubs for this entry. */
4515 stub_entry->stub_offset = stub_sec->size;
4516 loc = stub_sec->contents + stub_entry->stub_offset;
4518 stub_bfd = stub_sec->owner;
4520 /* This is the address of the stub destination. */
4521 sym_value = (stub_entry->target_value
4522 + stub_entry->target_section->output_offset
4523 + stub_entry->target_section->output_section->vma);
4525 template_sequence = stub_entry->stub_template;
4526 template_size = stub_entry->stub_template_size;
4529 for (i = 0; i < template_size; i++)
4531 switch (template_sequence[i].type)
4535 bfd_vma data = (bfd_vma) template_sequence[i].data;
4536 if (template_sequence[i].reloc_addend != 0)
4538 /* We've borrowed the reloc_addend field to mean we should
4539 insert a condition code into this (Thumb-1 branch)
4540 instruction. See THUMB16_BCOND_INSN. */
4541 BFD_ASSERT ((data & 0xff00) == 0xd000);
4542 data |= ((stub_entry->orig_insn >> 22) & 0xf) << 8;
4544 bfd_put_16 (stub_bfd, data, loc + size);
4550 bfd_put_16 (stub_bfd,
4551 (template_sequence[i].data >> 16) & 0xffff,
4553 bfd_put_16 (stub_bfd, template_sequence[i].data & 0xffff,
4555 if (template_sequence[i].r_type != R_ARM_NONE)
4557 stub_reloc_idx[nrelocs] = i;
4558 stub_reloc_offset[nrelocs++] = size;
4564 bfd_put_32 (stub_bfd, template_sequence[i].data,
4566 /* Handle cases where the target is encoded within the
4568 if (template_sequence[i].r_type == R_ARM_JUMP24)
4570 stub_reloc_idx[nrelocs] = i;
4571 stub_reloc_offset[nrelocs++] = size;
4577 bfd_put_32 (stub_bfd, template_sequence[i].data, loc + size);
4578 stub_reloc_idx[nrelocs] = i;
4579 stub_reloc_offset[nrelocs++] = size;
4589 stub_sec->size += size;
4591 /* Stub size has already been computed in arm_size_one_stub. Check
4593 BFD_ASSERT (size == stub_entry->stub_size);
4595 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4596 if (stub_entry->branch_type == ST_BRANCH_TO_THUMB)
4599 /* Assume there is at least one and at most MAXRELOCS entries to relocate
4601 BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS);
4603 for (i = 0; i < nrelocs; i++)
4605 Elf_Internal_Rela rel;
4606 bfd_boolean unresolved_reloc;
4607 char *error_message;
4609 sym_value + template_sequence[stub_reloc_idx[i]].reloc_addend;
4611 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
4612 rel.r_info = ELF32_R_INFO (0,
4613 template_sequence[stub_reloc_idx[i]].r_type);
4616 if (stub_entry->stub_type == arm_stub_a8_veneer_b_cond && i == 0)
4617 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4618 template should refer back to the instruction after the original
4619 branch. We use target_section as Cortex-A8 erratum workaround stubs
4620 are only generated when both source and target are in the same
4622 points_to = stub_entry->target_section->output_section->vma
4623 + stub_entry->target_section->output_offset
4624 + stub_entry->source_value;
4626 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4627 (template_sequence[stub_reloc_idx[i]].r_type),
4628 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
4629 points_to, info, stub_entry->target_section, "", STT_FUNC,
4630 stub_entry->branch_type,
4631 (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc,
4639 /* Calculate the template, template size and instruction size for a stub.
4640 Return value is the instruction size. */
4643 find_stub_size_and_template (enum elf32_arm_stub_type stub_type,
4644 const insn_sequence **stub_template,
4645 int *stub_template_size)
4647 const insn_sequence *template_sequence = NULL;
4648 int template_size = 0, i;
4651 template_sequence = stub_definitions[stub_type].template_sequence;
4653 *stub_template = template_sequence;
4655 template_size = stub_definitions[stub_type].template_size;
4656 if (stub_template_size)
4657 *stub_template_size = template_size;
4660 for (i = 0; i < template_size; i++)
4662 switch (template_sequence[i].type)
4683 /* As above, but don't actually build the stub. Just bump offset so
4684 we know stub section sizes. */
4687 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
4688 void *in_arg ATTRIBUTE_UNUSED)
4690 struct elf32_arm_stub_hash_entry *stub_entry;
4691 const insn_sequence *template_sequence;
4692 int template_size, size;
4694 /* Massage our args to the form they really have. */
4695 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
4697 BFD_ASSERT((stub_entry->stub_type > arm_stub_none)
4698 && stub_entry->stub_type < ARRAY_SIZE(stub_definitions));
4700 size = find_stub_size_and_template (stub_entry->stub_type, &template_sequence,
4703 stub_entry->stub_size = size;
4704 stub_entry->stub_template = template_sequence;
4705 stub_entry->stub_template_size = template_size;
4707 size = (size + 7) & ~7;
4708 stub_entry->stub_sec->size += size;
4713 /* External entry points for sizing and building linker stubs. */
4715 /* Set up various things so that we can make a list of input sections
4716 for each output section included in the link. Returns -1 on error,
4717 0 when no stubs will be needed, and 1 on success. */
4720 elf32_arm_setup_section_lists (bfd *output_bfd,
4721 struct bfd_link_info *info)
4724 unsigned int bfd_count;
4725 unsigned int top_id, top_index;
4727 asection **input_list, **list;
4729 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4733 if (! is_elf_hash_table (htab))
4736 /* Count the number of input BFDs and find the top input section id. */
4737 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
4739 input_bfd = input_bfd->link.next)
4742 for (section = input_bfd->sections;
4744 section = section->next)
4746 if (top_id < section->id)
4747 top_id = section->id;
4750 htab->bfd_count = bfd_count;
4752 amt = sizeof (struct map_stub) * (top_id + 1);
4753 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4754 if (htab->stub_group == NULL)
4756 htab->top_id = top_id;
4758 /* We can't use output_bfd->section_count here to find the top output
4759 section index as some sections may have been removed, and
4760 _bfd_strip_section_from_output doesn't renumber the indices. */
4761 for (section = output_bfd->sections, top_index = 0;
4763 section = section->next)
4765 if (top_index < section->index)
4766 top_index = section->index;
4769 htab->top_index = top_index;
4770 amt = sizeof (asection *) * (top_index + 1);
4771 input_list = (asection **) bfd_malloc (amt);
4772 htab->input_list = input_list;
4773 if (input_list == NULL)
4776 /* For sections we aren't interested in, mark their entries with a
4777 value we can check later. */
4778 list = input_list + top_index;
4780 *list = bfd_abs_section_ptr;
4781 while (list-- != input_list);
4783 for (section = output_bfd->sections;
4785 section = section->next)
4787 if ((section->flags & SEC_CODE) != 0)
4788 input_list[section->index] = NULL;
4794 /* The linker repeatedly calls this function for each input section,
4795 in the order that input sections are linked into output sections.
4796 Build lists of input sections to determine groupings between which
4797 we may insert linker stubs. */
4800 elf32_arm_next_input_section (struct bfd_link_info *info,
4803 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4808 if (isec->output_section->index <= htab->top_index)
4810 asection **list = htab->input_list + isec->output_section->index;
4812 if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0)
4814 /* Steal the link_sec pointer for our list. */
4815 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4816 /* This happens to make the list in reverse order,
4817 which we reverse later. */
4818 PREV_SEC (isec) = *list;
4824 /* See whether we can group stub sections together. Grouping stub
4825 sections may result in fewer stubs. More importantly, we need to
4826 put all .init* and .fini* stubs at the end of the .init or
4827 .fini output sections respectively, because glibc splits the
4828 _init and _fini functions into multiple parts. Putting a stub in
4829 the middle of a function is not a good idea. */
4832 group_sections (struct elf32_arm_link_hash_table *htab,
4833 bfd_size_type stub_group_size,
4834 bfd_boolean stubs_always_after_branch)
4836 asection **list = htab->input_list;
4840 asection *tail = *list;
4843 if (tail == bfd_abs_section_ptr)
4846 /* Reverse the list: we must avoid placing stubs at the
4847 beginning of the section because the beginning of the text
4848 section may be required for an interrupt vector in bare metal
4850 #define NEXT_SEC PREV_SEC
4852 while (tail != NULL)
4854 /* Pop from tail. */
4855 asection *item = tail;
4856 tail = PREV_SEC (item);
4859 NEXT_SEC (item) = head;
4863 while (head != NULL)
4867 bfd_vma stub_group_start = head->output_offset;
4868 bfd_vma end_of_next;
4871 while (NEXT_SEC (curr) != NULL)
4873 next = NEXT_SEC (curr);
4874 end_of_next = next->output_offset + next->size;
4875 if (end_of_next - stub_group_start >= stub_group_size)
4876 /* End of NEXT is too far from start, so stop. */
4878 /* Add NEXT to the group. */
4882 /* OK, the size from the start to the start of CURR is less
4883 than stub_group_size and thus can be handled by one stub
4884 section. (Or the head section is itself larger than
4885 stub_group_size, in which case we may be toast.)
4886 We should really be keeping track of the total size of
4887 stubs added here, as stubs contribute to the final output
4891 next = NEXT_SEC (head);
4892 /* Set up this stub group. */
4893 htab->stub_group[head->id].link_sec = curr;
4895 while (head != curr && (head = next) != NULL);
4897 /* But wait, there's more! Input sections up to stub_group_size
4898 bytes after the stub section can be handled by it too. */
4899 if (!stubs_always_after_branch)
4901 stub_group_start = curr->output_offset + curr->size;
4903 while (next != NULL)
4905 end_of_next = next->output_offset + next->size;
4906 if (end_of_next - stub_group_start >= stub_group_size)
4907 /* End of NEXT is too far from stubs, so stop. */
4909 /* Add NEXT to the stub group. */
4911 next = NEXT_SEC (head);
4912 htab->stub_group[head->id].link_sec = curr;
4918 while (list++ != htab->input_list + htab->top_index);
4920 free (htab->input_list);
4925 /* Comparison function for sorting/searching relocations relating to Cortex-A8
4929 a8_reloc_compare (const void *a, const void *b)
4931 const struct a8_erratum_reloc *ra = (const struct a8_erratum_reloc *) a;
4932 const struct a8_erratum_reloc *rb = (const struct a8_erratum_reloc *) b;
4934 if (ra->from < rb->from)
4936 else if (ra->from > rb->from)
4942 static struct elf_link_hash_entry *find_thumb_glue (struct bfd_link_info *,
4943 const char *, char **);
4945 /* Helper function to scan code for sequences which might trigger the Cortex-A8
4946 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
4947 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
4951 cortex_a8_erratum_scan (bfd *input_bfd,
4952 struct bfd_link_info *info,
4953 struct a8_erratum_fix **a8_fixes_p,
4954 unsigned int *num_a8_fixes_p,
4955 unsigned int *a8_fix_table_size_p,
4956 struct a8_erratum_reloc *a8_relocs,
4957 unsigned int num_a8_relocs,
4958 unsigned prev_num_a8_fixes,
4959 bfd_boolean *stub_changed_p)
4962 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4963 struct a8_erratum_fix *a8_fixes = *a8_fixes_p;
4964 unsigned int num_a8_fixes = *num_a8_fixes_p;
4965 unsigned int a8_fix_table_size = *a8_fix_table_size_p;
4970 for (section = input_bfd->sections;
4972 section = section->next)
4974 bfd_byte *contents = NULL;
4975 struct _arm_elf_section_data *sec_data;
4979 if (elf_section_type (section) != SHT_PROGBITS
4980 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
4981 || (section->flags & SEC_EXCLUDE) != 0
4982 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
4983 || (section->output_section == bfd_abs_section_ptr))
4986 base_vma = section->output_section->vma + section->output_offset;
4988 if (elf_section_data (section)->this_hdr.contents != NULL)
4989 contents = elf_section_data (section)->this_hdr.contents;
4990 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
4993 sec_data = elf32_arm_section_data (section);
4995 for (span = 0; span < sec_data->mapcount; span++)
4997 unsigned int span_start = sec_data->map[span].vma;
4998 unsigned int span_end = (span == sec_data->mapcount - 1)
4999 ? section->size : sec_data->map[span + 1].vma;
5001 char span_type = sec_data->map[span].type;
5002 bfd_boolean last_was_32bit = FALSE, last_was_branch = FALSE;
5004 if (span_type != 't')
5007 /* Span is entirely within a single 4KB region: skip scanning. */
5008 if (((base_vma + span_start) & ~0xfff)
5009 == ((base_vma + span_end) & ~0xfff))
5012 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
5014 * The opcode is BLX.W, BL.W, B.W, Bcc.W
5015 * The branch target is in the same 4KB region as the
5016 first half of the branch.
5017 * The instruction before the branch is a 32-bit
5018 length non-branch instruction. */
5019 for (i = span_start; i < span_end;)
5021 unsigned int insn = bfd_getl16 (&contents[i]);
5022 bfd_boolean insn_32bit = FALSE, is_blx = FALSE, is_b = FALSE;
5023 bfd_boolean is_bl = FALSE, is_bcc = FALSE, is_32bit_branch;
5025 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
5030 /* Load the rest of the insn (in manual-friendly order). */
5031 insn = (insn << 16) | bfd_getl16 (&contents[i + 2]);
5033 /* Encoding T4: B<c>.W. */
5034 is_b = (insn & 0xf800d000) == 0xf0009000;
5035 /* Encoding T1: BL<c>.W. */
5036 is_bl = (insn & 0xf800d000) == 0xf000d000;
5037 /* Encoding T2: BLX<c>.W. */
5038 is_blx = (insn & 0xf800d000) == 0xf000c000;
5039 /* Encoding T3: B<c>.W (not permitted in IT block). */
5040 is_bcc = (insn & 0xf800d000) == 0xf0008000
5041 && (insn & 0x07f00000) != 0x03800000;
5044 is_32bit_branch = is_b || is_bl || is_blx || is_bcc;
5046 if (((base_vma + i) & 0xfff) == 0xffe
5050 && ! last_was_branch)
5052 bfd_signed_vma offset = 0;
5053 bfd_boolean force_target_arm = FALSE;
5054 bfd_boolean force_target_thumb = FALSE;
5056 enum elf32_arm_stub_type stub_type = arm_stub_none;
5057 struct a8_erratum_reloc key, *found;
5058 bfd_boolean use_plt = FALSE;
5060 key.from = base_vma + i;
5061 found = (struct a8_erratum_reloc *)
5062 bsearch (&key, a8_relocs, num_a8_relocs,
5063 sizeof (struct a8_erratum_reloc),
5068 char *error_message = NULL;
5069 struct elf_link_hash_entry *entry;
5071 /* We don't care about the error returned from this
5072 function, only if there is glue or not. */
5073 entry = find_thumb_glue (info, found->sym_name,
5077 found->non_a8_stub = TRUE;
5079 /* Keep a simpler condition, for the sake of clarity. */
5080 if (htab->root.splt != NULL && found->hash != NULL
5081 && found->hash->root.plt.offset != (bfd_vma) -1)
5084 if (found->r_type == R_ARM_THM_CALL)
5086 if (found->branch_type == ST_BRANCH_TO_ARM
5088 force_target_arm = TRUE;
5090 force_target_thumb = TRUE;
5094 /* Check if we have an offending branch instruction. */
5096 if (found && found->non_a8_stub)
5097 /* We've already made a stub for this instruction, e.g.
5098 it's a long branch or a Thumb->ARM stub. Assume that
5099 stub will suffice to work around the A8 erratum (see
5100 setting of always_after_branch above). */
5104 offset = (insn & 0x7ff) << 1;
5105 offset |= (insn & 0x3f0000) >> 4;
5106 offset |= (insn & 0x2000) ? 0x40000 : 0;
5107 offset |= (insn & 0x800) ? 0x80000 : 0;
5108 offset |= (insn & 0x4000000) ? 0x100000 : 0;
5109 if (offset & 0x100000)
5110 offset |= ~ ((bfd_signed_vma) 0xfffff);
5111 stub_type = arm_stub_a8_veneer_b_cond;
5113 else if (is_b || is_bl || is_blx)
5115 int s = (insn & 0x4000000) != 0;
5116 int j1 = (insn & 0x2000) != 0;
5117 int j2 = (insn & 0x800) != 0;
5121 offset = (insn & 0x7ff) << 1;
5122 offset |= (insn & 0x3ff0000) >> 4;
5126 if (offset & 0x1000000)
5127 offset |= ~ ((bfd_signed_vma) 0xffffff);
5130 offset &= ~ ((bfd_signed_vma) 3);
5132 stub_type = is_blx ? arm_stub_a8_veneer_blx :
5133 is_bl ? arm_stub_a8_veneer_bl : arm_stub_a8_veneer_b;
5136 if (stub_type != arm_stub_none)
5138 bfd_vma pc_for_insn = base_vma + i + 4;
5140 /* The original instruction is a BL, but the target is
5141 an ARM instruction. If we were not making a stub,
5142 the BL would have been converted to a BLX. Use the
5143 BLX stub instead in that case. */
5144 if (htab->use_blx && force_target_arm
5145 && stub_type == arm_stub_a8_veneer_bl)
5147 stub_type = arm_stub_a8_veneer_blx;
5151 /* Conversely, if the original instruction was
5152 BLX but the target is Thumb mode, use the BL
5154 else if (force_target_thumb
5155 && stub_type == arm_stub_a8_veneer_blx)
5157 stub_type = arm_stub_a8_veneer_bl;
5163 pc_for_insn &= ~ ((bfd_vma) 3);
5165 /* If we found a relocation, use the proper destination,
5166 not the offset in the (unrelocated) instruction.
5167 Note this is always done if we switched the stub type
5171 (bfd_signed_vma) (found->destination - pc_for_insn);
5173 /* If the stub will use a Thumb-mode branch to a
5174 PLT target, redirect it to the preceding Thumb
5176 if (stub_type != arm_stub_a8_veneer_blx && use_plt)
5177 offset -= PLT_THUMB_STUB_SIZE;
5179 target = pc_for_insn + offset;
5181 /* The BLX stub is ARM-mode code. Adjust the offset to
5182 take the different PC value (+8 instead of +4) into
5184 if (stub_type == arm_stub_a8_veneer_blx)
5187 if (((base_vma + i) & ~0xfff) == (target & ~0xfff))
5189 char *stub_name = NULL;
5191 if (num_a8_fixes == a8_fix_table_size)
5193 a8_fix_table_size *= 2;
5194 a8_fixes = (struct a8_erratum_fix *)
5195 bfd_realloc (a8_fixes,
5196 sizeof (struct a8_erratum_fix)
5197 * a8_fix_table_size);
5200 if (num_a8_fixes < prev_num_a8_fixes)
5202 /* If we're doing a subsequent scan,
5203 check if we've found the same fix as
5204 before, and try and reuse the stub
5206 stub_name = a8_fixes[num_a8_fixes].stub_name;
5207 if ((a8_fixes[num_a8_fixes].section != section)
5208 || (a8_fixes[num_a8_fixes].offset != i))
5212 *stub_changed_p = TRUE;
5218 stub_name = (char *) bfd_malloc (8 + 1 + 8 + 1);
5219 if (stub_name != NULL)
5220 sprintf (stub_name, "%x:%x", section->id, i);
5223 a8_fixes[num_a8_fixes].input_bfd = input_bfd;
5224 a8_fixes[num_a8_fixes].section = section;
5225 a8_fixes[num_a8_fixes].offset = i;
5226 a8_fixes[num_a8_fixes].target_offset =
5228 a8_fixes[num_a8_fixes].orig_insn = insn;
5229 a8_fixes[num_a8_fixes].stub_name = stub_name;
5230 a8_fixes[num_a8_fixes].stub_type = stub_type;
5231 a8_fixes[num_a8_fixes].branch_type =
5232 is_blx ? ST_BRANCH_TO_ARM : ST_BRANCH_TO_THUMB;
5239 i += insn_32bit ? 4 : 2;
5240 last_was_32bit = insn_32bit;
5241 last_was_branch = is_32bit_branch;
5245 if (elf_section_data (section)->this_hdr.contents == NULL)
5249 *a8_fixes_p = a8_fixes;
5250 *num_a8_fixes_p = num_a8_fixes;
5251 *a8_fix_table_size_p = a8_fix_table_size;
5256 /* Create or update a stub entry depending on whether the stub can already be
5257 found in HTAB. The stub is identified by:
5258 - its type STUB_TYPE
5259 - its source branch (note that several can share the same stub) whose
5260 section and relocation (if any) are given by SECTION and IRELA
5262 - its target symbol whose input section, hash, name, value and branch type
5263 are given in SYM_SEC, HASH, SYM_NAME, SYM_VALUE and BRANCH_TYPE
5266 If found, the value of the stub's target symbol is updated from SYM_VALUE
5267 and *NEW_STUB is set to FALSE. Otherwise, *NEW_STUB is set to
5268 TRUE and the stub entry is initialized.
5270 Returns whether the stub could be successfully created or updated, or FALSE
5271 if an error occured. */
5274 elf32_arm_create_stub (struct elf32_arm_link_hash_table *htab,
5275 enum elf32_arm_stub_type stub_type, asection *section,
5276 Elf_Internal_Rela *irela, asection *sym_sec,
5277 struct elf32_arm_link_hash_entry *hash, char *sym_name,
5278 bfd_vma sym_value, enum arm_st_branch_type branch_type,
5279 bfd_boolean *new_stub)
5281 const asection *id_sec;
5283 struct elf32_arm_stub_hash_entry *stub_entry;
5284 unsigned int r_type;
5285 bfd_boolean sym_claimed = arm_stub_sym_claimed (stub_type);
5287 BFD_ASSERT (stub_type != arm_stub_none);
5291 stub_name = sym_name;
5295 BFD_ASSERT (section);
5297 /* Support for grouping stub sections. */
5298 id_sec = htab->stub_group[section->id].link_sec;
5300 /* Get the name of this stub. */
5301 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela,
5307 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name, FALSE,
5309 /* The proper stub has already been created, just update its value. */
5310 if (stub_entry != NULL)
5314 stub_entry->target_value = sym_value;
5318 stub_entry = elf32_arm_add_stub (stub_name, section, htab, stub_type);
5319 if (stub_entry == NULL)
5326 stub_entry->target_value = sym_value;
5327 stub_entry->target_section = sym_sec;
5328 stub_entry->stub_type = stub_type;
5329 stub_entry->h = hash;
5330 stub_entry->branch_type = branch_type;
5333 stub_entry->output_name = sym_name;
5336 if (sym_name == NULL)
5337 sym_name = "unnamed";
5338 stub_entry->output_name = (char *)
5339 bfd_alloc (htab->stub_bfd, sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
5340 + strlen (sym_name));
5341 if (stub_entry->output_name == NULL)
5347 /* For historical reasons, use the existing names for ARM-to-Thumb and
5348 Thumb-to-ARM stubs. */
5349 r_type = ELF32_R_TYPE (irela->r_info);
5350 if ((r_type == (unsigned int) R_ARM_THM_CALL
5351 || r_type == (unsigned int) R_ARM_THM_JUMP24
5352 || r_type == (unsigned int) R_ARM_THM_JUMP19)
5353 && branch_type == ST_BRANCH_TO_ARM)
5354 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME, sym_name);
5355 else if ((r_type == (unsigned int) R_ARM_CALL
5356 || r_type == (unsigned int) R_ARM_JUMP24)
5357 && branch_type == ST_BRANCH_TO_THUMB)
5358 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME, sym_name);
5360 sprintf (stub_entry->output_name, STUB_ENTRY_NAME, sym_name);
5367 /* Determine and set the size of the stub section for a final link.
5369 The basic idea here is to examine all the relocations looking for
5370 PC-relative calls to a target that is unreachable with a "bl"
5374 elf32_arm_size_stubs (bfd *output_bfd,
5376 struct bfd_link_info *info,
5377 bfd_signed_vma group_size,
5378 asection * (*add_stub_section) (const char *, asection *,
5381 void (*layout_sections_again) (void))
5383 bfd_size_type stub_group_size;
5384 bfd_boolean stubs_always_after_branch;
5385 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5386 struct a8_erratum_fix *a8_fixes = NULL;
5387 unsigned int num_a8_fixes = 0, a8_fix_table_size = 10;
5388 struct a8_erratum_reloc *a8_relocs = NULL;
5389 unsigned int num_a8_relocs = 0, a8_reloc_table_size = 10, i;
5394 if (htab->fix_cortex_a8)
5396 a8_fixes = (struct a8_erratum_fix *)
5397 bfd_zmalloc (sizeof (struct a8_erratum_fix) * a8_fix_table_size);
5398 a8_relocs = (struct a8_erratum_reloc *)
5399 bfd_zmalloc (sizeof (struct a8_erratum_reloc) * a8_reloc_table_size);
5402 /* Propagate mach to stub bfd, because it may not have been
5403 finalized when we created stub_bfd. */
5404 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
5405 bfd_get_mach (output_bfd));
5407 /* Stash our params away. */
5408 htab->stub_bfd = stub_bfd;
5409 htab->add_stub_section = add_stub_section;
5410 htab->layout_sections_again = layout_sections_again;
5411 stubs_always_after_branch = group_size < 0;
5413 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
5414 as the first half of a 32-bit branch straddling two 4K pages. This is a
5415 crude way of enforcing that. */
5416 if (htab->fix_cortex_a8)
5417 stubs_always_after_branch = 1;
5420 stub_group_size = -group_size;
5422 stub_group_size = group_size;
5424 if (stub_group_size == 1)
5426 /* Default values. */
5427 /* Thumb branch range is +-4MB has to be used as the default
5428 maximum size (a given section can contain both ARM and Thumb
5429 code, so the worst case has to be taken into account).
5431 This value is 24K less than that, which allows for 2025
5432 12-byte stubs. If we exceed that, then we will fail to link.
5433 The user will have to relink with an explicit group size
5435 stub_group_size = 4170000;
5438 group_sections (htab, stub_group_size, stubs_always_after_branch);
5440 /* If we're applying the cortex A8 fix, we need to determine the
5441 program header size now, because we cannot change it later --
5442 that could alter section placements. Notice the A8 erratum fix
5443 ends up requiring the section addresses to remain unchanged
5444 modulo the page size. That's something we cannot represent
5445 inside BFD, and we don't want to force the section alignment to
5446 be the page size. */
5447 if (htab->fix_cortex_a8)
5448 (*htab->layout_sections_again) ();
5453 unsigned int bfd_indx;
5455 enum elf32_arm_stub_type stub_type;
5456 bfd_boolean stub_changed = FALSE;
5457 unsigned prev_num_a8_fixes = num_a8_fixes;
5460 for (input_bfd = info->input_bfds, bfd_indx = 0;
5462 input_bfd = input_bfd->link.next, bfd_indx++)
5464 Elf_Internal_Shdr *symtab_hdr;
5466 Elf_Internal_Sym *local_syms = NULL;
5468 if (!is_arm_elf (input_bfd))
5473 /* We'll need the symbol table in a second. */
5474 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5475 if (symtab_hdr->sh_info == 0)
5478 /* Walk over each section attached to the input bfd. */
5479 for (section = input_bfd->sections;
5481 section = section->next)
5483 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
5485 /* If there aren't any relocs, then there's nothing more
5487 if ((section->flags & SEC_RELOC) == 0
5488 || section->reloc_count == 0
5489 || (section->flags & SEC_CODE) == 0)
5492 /* If this section is a link-once section that will be
5493 discarded, then don't create any stubs. */
5494 if (section->output_section == NULL
5495 || section->output_section->owner != output_bfd)
5498 /* Get the relocs. */
5500 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
5501 NULL, info->keep_memory);
5502 if (internal_relocs == NULL)
5503 goto error_ret_free_local;
5505 /* Now examine each relocation. */
5506 irela = internal_relocs;
5507 irelaend = irela + section->reloc_count;
5508 for (; irela < irelaend; irela++)
5510 unsigned int r_type, r_indx;
5513 bfd_vma destination;
5514 struct elf32_arm_link_hash_entry *hash;
5515 const char *sym_name;
5516 unsigned char st_type;
5517 enum arm_st_branch_type branch_type;
5518 bfd_boolean created_stub = FALSE;
5520 r_type = ELF32_R_TYPE (irela->r_info);
5521 r_indx = ELF32_R_SYM (irela->r_info);
5523 if (r_type >= (unsigned int) R_ARM_max)
5525 bfd_set_error (bfd_error_bad_value);
5526 error_ret_free_internal:
5527 if (elf_section_data (section)->relocs == NULL)
5528 free (internal_relocs);
5530 error_ret_free_local:
5531 if (local_syms != NULL
5532 && (symtab_hdr->contents
5533 != (unsigned char *) local_syms))
5539 if (r_indx >= symtab_hdr->sh_info)
5540 hash = elf32_arm_hash_entry
5541 (elf_sym_hashes (input_bfd)
5542 [r_indx - symtab_hdr->sh_info]);
5544 /* Only look for stubs on branch instructions, or
5545 non-relaxed TLSCALL */
5546 if ((r_type != (unsigned int) R_ARM_CALL)
5547 && (r_type != (unsigned int) R_ARM_THM_CALL)
5548 && (r_type != (unsigned int) R_ARM_JUMP24)
5549 && (r_type != (unsigned int) R_ARM_THM_JUMP19)
5550 && (r_type != (unsigned int) R_ARM_THM_XPC22)
5551 && (r_type != (unsigned int) R_ARM_THM_JUMP24)
5552 && (r_type != (unsigned int) R_ARM_PLT32)
5553 && !((r_type == (unsigned int) R_ARM_TLS_CALL
5554 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
5555 && r_type == elf32_arm_tls_transition
5556 (info, r_type, &hash->root)
5557 && ((hash ? hash->tls_type
5558 : (elf32_arm_local_got_tls_type
5559 (input_bfd)[r_indx]))
5560 & GOT_TLS_GDESC) != 0))
5563 /* Now determine the call target, its name, value,
5570 if (r_type == (unsigned int) R_ARM_TLS_CALL
5571 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
5573 /* A non-relaxed TLS call. The target is the
5574 plt-resident trampoline and nothing to do
5576 BFD_ASSERT (htab->tls_trampoline > 0);
5577 sym_sec = htab->root.splt;
5578 sym_value = htab->tls_trampoline;
5581 branch_type = ST_BRANCH_TO_ARM;
5585 /* It's a local symbol. */
5586 Elf_Internal_Sym *sym;
5588 if (local_syms == NULL)
5591 = (Elf_Internal_Sym *) symtab_hdr->contents;
5592 if (local_syms == NULL)
5594 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
5595 symtab_hdr->sh_info, 0,
5597 if (local_syms == NULL)
5598 goto error_ret_free_internal;
5601 sym = local_syms + r_indx;
5602 if (sym->st_shndx == SHN_UNDEF)
5603 sym_sec = bfd_und_section_ptr;
5604 else if (sym->st_shndx == SHN_ABS)
5605 sym_sec = bfd_abs_section_ptr;
5606 else if (sym->st_shndx == SHN_COMMON)
5607 sym_sec = bfd_com_section_ptr;
5610 bfd_section_from_elf_index (input_bfd, sym->st_shndx);
5613 /* This is an undefined symbol. It can never
5617 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
5618 sym_value = sym->st_value;
5619 destination = (sym_value + irela->r_addend
5620 + sym_sec->output_offset
5621 + sym_sec->output_section->vma);
5622 st_type = ELF_ST_TYPE (sym->st_info);
5624 ARM_GET_SYM_BRANCH_TYPE (sym->st_target_internal);
5626 = bfd_elf_string_from_elf_section (input_bfd,
5627 symtab_hdr->sh_link,
5632 /* It's an external symbol. */
5633 while (hash->root.root.type == bfd_link_hash_indirect
5634 || hash->root.root.type == bfd_link_hash_warning)
5635 hash = ((struct elf32_arm_link_hash_entry *)
5636 hash->root.root.u.i.link);
5638 if (hash->root.root.type == bfd_link_hash_defined
5639 || hash->root.root.type == bfd_link_hash_defweak)
5641 sym_sec = hash->root.root.u.def.section;
5642 sym_value = hash->root.root.u.def.value;
5644 struct elf32_arm_link_hash_table *globals =
5645 elf32_arm_hash_table (info);
5647 /* For a destination in a shared library,
5648 use the PLT stub as target address to
5649 decide whether a branch stub is
5652 && globals->root.splt != NULL
5654 && hash->root.plt.offset != (bfd_vma) -1)
5656 sym_sec = globals->root.splt;
5657 sym_value = hash->root.plt.offset;
5658 if (sym_sec->output_section != NULL)
5659 destination = (sym_value
5660 + sym_sec->output_offset
5661 + sym_sec->output_section->vma);
5663 else if (sym_sec->output_section != NULL)
5664 destination = (sym_value + irela->r_addend
5665 + sym_sec->output_offset
5666 + sym_sec->output_section->vma);
5668 else if ((hash->root.root.type == bfd_link_hash_undefined)
5669 || (hash->root.root.type == bfd_link_hash_undefweak))
5671 /* For a shared library, use the PLT stub as
5672 target address to decide whether a long
5673 branch stub is needed.
5674 For absolute code, they cannot be handled. */
5675 struct elf32_arm_link_hash_table *globals =
5676 elf32_arm_hash_table (info);
5679 && globals->root.splt != NULL
5681 && hash->root.plt.offset != (bfd_vma) -1)
5683 sym_sec = globals->root.splt;
5684 sym_value = hash->root.plt.offset;
5685 if (sym_sec->output_section != NULL)
5686 destination = (sym_value
5687 + sym_sec->output_offset
5688 + sym_sec->output_section->vma);
5695 bfd_set_error (bfd_error_bad_value);
5696 goto error_ret_free_internal;
5698 st_type = hash->root.type;
5700 ARM_GET_SYM_BRANCH_TYPE (hash->root.target_internal);
5701 sym_name = hash->root.root.root.string;
5706 bfd_boolean new_stub;
5708 /* Determine what (if any) linker stub is needed. */
5709 stub_type = arm_type_of_stub (info, section, irela,
5710 st_type, &branch_type,
5711 hash, destination, sym_sec,
5712 input_bfd, sym_name);
5713 if (stub_type == arm_stub_none)
5716 /* We've either created a stub for this reloc already,
5717 or we are about to. */
5719 elf32_arm_create_stub (htab, stub_type, section, irela,
5721 (char *) sym_name, sym_value,
5722 branch_type, &new_stub);
5725 goto error_ret_free_internal;
5729 stub_changed = TRUE;
5733 /* Look for relocations which might trigger Cortex-A8
5735 if (htab->fix_cortex_a8
5736 && (r_type == (unsigned int) R_ARM_THM_JUMP24
5737 || r_type == (unsigned int) R_ARM_THM_JUMP19
5738 || r_type == (unsigned int) R_ARM_THM_CALL
5739 || r_type == (unsigned int) R_ARM_THM_XPC22))
5741 bfd_vma from = section->output_section->vma
5742 + section->output_offset
5745 if ((from & 0xfff) == 0xffe)
5747 /* Found a candidate. Note we haven't checked the
5748 destination is within 4K here: if we do so (and
5749 don't create an entry in a8_relocs) we can't tell
5750 that a branch should have been relocated when
5752 if (num_a8_relocs == a8_reloc_table_size)
5754 a8_reloc_table_size *= 2;
5755 a8_relocs = (struct a8_erratum_reloc *)
5756 bfd_realloc (a8_relocs,
5757 sizeof (struct a8_erratum_reloc)
5758 * a8_reloc_table_size);
5761 a8_relocs[num_a8_relocs].from = from;
5762 a8_relocs[num_a8_relocs].destination = destination;
5763 a8_relocs[num_a8_relocs].r_type = r_type;
5764 a8_relocs[num_a8_relocs].branch_type = branch_type;
5765 a8_relocs[num_a8_relocs].sym_name = sym_name;
5766 a8_relocs[num_a8_relocs].non_a8_stub = created_stub;
5767 a8_relocs[num_a8_relocs].hash = hash;
5774 /* We're done with the internal relocs, free them. */
5775 if (elf_section_data (section)->relocs == NULL)
5776 free (internal_relocs);
5779 if (htab->fix_cortex_a8)
5781 /* Sort relocs which might apply to Cortex-A8 erratum. */
5782 qsort (a8_relocs, num_a8_relocs,
5783 sizeof (struct a8_erratum_reloc),
5786 /* Scan for branches which might trigger Cortex-A8 erratum. */
5787 if (cortex_a8_erratum_scan (input_bfd, info, &a8_fixes,
5788 &num_a8_fixes, &a8_fix_table_size,
5789 a8_relocs, num_a8_relocs,
5790 prev_num_a8_fixes, &stub_changed)
5792 goto error_ret_free_local;
5795 if (local_syms != NULL
5796 && symtab_hdr->contents != (unsigned char *) local_syms)
5798 if (!info->keep_memory)
5801 symtab_hdr->contents = (unsigned char *) local_syms;
5805 if (prev_num_a8_fixes != num_a8_fixes)
5806 stub_changed = TRUE;
5811 /* OK, we've added some stubs. Find out the new size of the
5813 for (stub_sec = htab->stub_bfd->sections;
5815 stub_sec = stub_sec->next)
5817 /* Ignore non-stub sections. */
5818 if (!strstr (stub_sec->name, STUB_SUFFIX))
5824 /* Compute stub section size, considering padding. */
5825 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
5826 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type;
5830 asection **stub_sec_p;
5832 padding = arm_dedicated_stub_section_padding (stub_type);
5833 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
5834 /* Skip if no stub input section or no stub section padding
5836 if ((stub_sec_p != NULL && *stub_sec_p == NULL) || padding == 0)
5838 /* Stub section padding required but no dedicated section. */
5839 BFD_ASSERT (stub_sec_p);
5841 size = (*stub_sec_p)->size;
5842 size = (size + padding - 1) & ~(padding - 1);
5843 (*stub_sec_p)->size = size;
5846 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
5847 if (htab->fix_cortex_a8)
5848 for (i = 0; i < num_a8_fixes; i++)
5850 stub_sec = elf32_arm_create_or_find_stub_sec (NULL,
5851 a8_fixes[i].section, htab, a8_fixes[i].stub_type);
5853 if (stub_sec == NULL)
5857 += find_stub_size_and_template (a8_fixes[i].stub_type, NULL,
5862 /* Ask the linker to do its stuff. */
5863 (*htab->layout_sections_again) ();
5866 /* Add stubs for Cortex-A8 erratum fixes now. */
5867 if (htab->fix_cortex_a8)
5869 for (i = 0; i < num_a8_fixes; i++)
5871 struct elf32_arm_stub_hash_entry *stub_entry;
5872 char *stub_name = a8_fixes[i].stub_name;
5873 asection *section = a8_fixes[i].section;
5874 unsigned int section_id = a8_fixes[i].section->id;
5875 asection *link_sec = htab->stub_group[section_id].link_sec;
5876 asection *stub_sec = htab->stub_group[section_id].stub_sec;
5877 const insn_sequence *template_sequence;
5878 int template_size, size = 0;
5880 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
5882 if (stub_entry == NULL)
5884 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
5890 stub_entry->stub_sec = stub_sec;
5891 stub_entry->stub_offset = 0;
5892 stub_entry->id_sec = link_sec;
5893 stub_entry->stub_type = a8_fixes[i].stub_type;
5894 stub_entry->source_value = a8_fixes[i].offset;
5895 stub_entry->target_section = a8_fixes[i].section;
5896 stub_entry->target_value = a8_fixes[i].target_offset;
5897 stub_entry->orig_insn = a8_fixes[i].orig_insn;
5898 stub_entry->branch_type = a8_fixes[i].branch_type;
5900 size = find_stub_size_and_template (a8_fixes[i].stub_type,
5904 stub_entry->stub_size = size;
5905 stub_entry->stub_template = template_sequence;
5906 stub_entry->stub_template_size = template_size;
5909 /* Stash the Cortex-A8 erratum fix array for use later in
5910 elf32_arm_write_section(). */
5911 htab->a8_erratum_fixes = a8_fixes;
5912 htab->num_a8_erratum_fixes = num_a8_fixes;
5916 htab->a8_erratum_fixes = NULL;
5917 htab->num_a8_erratum_fixes = 0;
5922 /* Build all the stubs associated with the current output file. The
5923 stubs are kept in a hash table attached to the main linker hash
5924 table. We also set up the .plt entries for statically linked PIC
5925 functions here. This function is called via arm_elf_finish in the
5929 elf32_arm_build_stubs (struct bfd_link_info *info)
5932 struct bfd_hash_table *table;
5933 struct elf32_arm_link_hash_table *htab;
5935 htab = elf32_arm_hash_table (info);
5939 for (stub_sec = htab->stub_bfd->sections;
5941 stub_sec = stub_sec->next)
5945 /* Ignore non-stub sections. */
5946 if (!strstr (stub_sec->name, STUB_SUFFIX))
5949 /* Allocate memory to hold the linker stubs. Zeroing the stub sections
5950 must at least be done for stub section requiring padding. */
5951 size = stub_sec->size;
5952 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
5953 if (stub_sec->contents == NULL && size != 0)
5958 /* Build the stubs as directed by the stub hash table. */
5959 table = &htab->stub_hash_table;
5960 bfd_hash_traverse (table, arm_build_one_stub, info);
5961 if (htab->fix_cortex_a8)
5963 /* Place the cortex a8 stubs last. */
5964 htab->fix_cortex_a8 = -1;
5965 bfd_hash_traverse (table, arm_build_one_stub, info);
5971 /* Locate the Thumb encoded calling stub for NAME. */
5973 static struct elf_link_hash_entry *
5974 find_thumb_glue (struct bfd_link_info *link_info,
5976 char **error_message)
5979 struct elf_link_hash_entry *hash;
5980 struct elf32_arm_link_hash_table *hash_table;
5982 /* We need a pointer to the armelf specific hash table. */
5983 hash_table = elf32_arm_hash_table (link_info);
5984 if (hash_table == NULL)
5987 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5988 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
5990 BFD_ASSERT (tmp_name);
5992 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
5994 hash = elf_link_hash_lookup
5995 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
5998 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
5999 tmp_name, name) == -1)
6000 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
6007 /* Locate the ARM encoded calling stub for NAME. */
6009 static struct elf_link_hash_entry *
6010 find_arm_glue (struct bfd_link_info *link_info,
6012 char **error_message)
6015 struct elf_link_hash_entry *myh;
6016 struct elf32_arm_link_hash_table *hash_table;
6018 /* We need a pointer to the elfarm specific hash table. */
6019 hash_table = elf32_arm_hash_table (link_info);
6020 if (hash_table == NULL)
6023 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
6024 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
6026 BFD_ASSERT (tmp_name);
6028 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
6030 myh = elf_link_hash_lookup
6031 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
6034 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
6035 tmp_name, name) == -1)
6036 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
6043 /* ARM->Thumb glue (static images):
6047 ldr r12, __func_addr
6050 .word func @ behave as if you saw a ARM_32 reloc.
6057 .word func @ behave as if you saw a ARM_32 reloc.
6059 (relocatable images)
6062 ldr r12, __func_offset
6068 #define ARM2THUMB_STATIC_GLUE_SIZE 12
6069 static const insn32 a2t1_ldr_insn = 0xe59fc000;
6070 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
6071 static const insn32 a2t3_func_addr_insn = 0x00000001;
6073 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
6074 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
6075 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
6077 #define ARM2THUMB_PIC_GLUE_SIZE 16
6078 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
6079 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
6080 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
6082 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
6086 __func_from_thumb: __func_from_thumb:
6088 nop ldr r6, __func_addr
6098 #define THUMB2ARM_GLUE_SIZE 8
6099 static const insn16 t2a1_bx_pc_insn = 0x4778;
6100 static const insn16 t2a2_noop_insn = 0x46c0;
6101 static const insn32 t2a3_b_insn = 0xea000000;
6103 #define VFP11_ERRATUM_VENEER_SIZE 8
6104 #define STM32L4XX_ERRATUM_LDM_VENEER_SIZE 16
6105 #define STM32L4XX_ERRATUM_VLDM_VENEER_SIZE 24
6107 #define ARM_BX_VENEER_SIZE 12
6108 static const insn32 armbx1_tst_insn = 0xe3100001;
6109 static const insn32 armbx2_moveq_insn = 0x01a0f000;
6110 static const insn32 armbx3_bx_insn = 0xe12fff10;
6112 #ifndef ELFARM_NABI_C_INCLUDED
6114 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
6117 bfd_byte * contents;
6121 /* Do not include empty glue sections in the output. */
6124 s = bfd_get_linker_section (abfd, name);
6126 s->flags |= SEC_EXCLUDE;
6131 BFD_ASSERT (abfd != NULL);
6133 s = bfd_get_linker_section (abfd, name);
6134 BFD_ASSERT (s != NULL);
6136 contents = (bfd_byte *) bfd_alloc (abfd, size);
6138 BFD_ASSERT (s->size == size);
6139 s->contents = contents;
6143 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
6145 struct elf32_arm_link_hash_table * globals;
6147 globals = elf32_arm_hash_table (info);
6148 BFD_ASSERT (globals != NULL);
6150 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6151 globals->arm_glue_size,
6152 ARM2THUMB_GLUE_SECTION_NAME);
6154 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6155 globals->thumb_glue_size,
6156 THUMB2ARM_GLUE_SECTION_NAME);
6158 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6159 globals->vfp11_erratum_glue_size,
6160 VFP11_ERRATUM_VENEER_SECTION_NAME);
6162 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6163 globals->stm32l4xx_erratum_glue_size,
6164 STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
6166 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
6167 globals->bx_glue_size,
6168 ARM_BX_GLUE_SECTION_NAME);
6173 /* Allocate space and symbols for calling a Thumb function from Arm mode.
6174 returns the symbol identifying the stub. */
6176 static struct elf_link_hash_entry *
6177 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
6178 struct elf_link_hash_entry * h)
6180 const char * name = h->root.root.string;
6183 struct elf_link_hash_entry * myh;
6184 struct bfd_link_hash_entry * bh;
6185 struct elf32_arm_link_hash_table * globals;
6189 globals = elf32_arm_hash_table (link_info);
6190 BFD_ASSERT (globals != NULL);
6191 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6193 s = bfd_get_linker_section
6194 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
6196 BFD_ASSERT (s != NULL);
6198 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
6199 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
6201 BFD_ASSERT (tmp_name);
6203 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
6205 myh = elf_link_hash_lookup
6206 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
6210 /* We've already seen this guy. */
6215 /* The only trick here is using hash_table->arm_glue_size as the value.
6216 Even though the section isn't allocated yet, this is where we will be
6217 putting it. The +1 on the value marks that the stub has not been
6218 output yet - not that it is a Thumb function. */
6220 val = globals->arm_glue_size + 1;
6221 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
6222 tmp_name, BSF_GLOBAL, s, val,
6223 NULL, TRUE, FALSE, &bh);
6225 myh = (struct elf_link_hash_entry *) bh;
6226 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6227 myh->forced_local = 1;
6231 if (bfd_link_pic (link_info)
6232 || globals->root.is_relocatable_executable
6233 || globals->pic_veneer)
6234 size = ARM2THUMB_PIC_GLUE_SIZE;
6235 else if (globals->use_blx)
6236 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
6238 size = ARM2THUMB_STATIC_GLUE_SIZE;
6241 globals->arm_glue_size += size;
6246 /* Allocate space for ARMv4 BX veneers. */
6249 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
6252 struct elf32_arm_link_hash_table *globals;
6254 struct elf_link_hash_entry *myh;
6255 struct bfd_link_hash_entry *bh;
6258 /* BX PC does not need a veneer. */
6262 globals = elf32_arm_hash_table (link_info);
6263 BFD_ASSERT (globals != NULL);
6264 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6266 /* Check if this veneer has already been allocated. */
6267 if (globals->bx_glue_offset[reg])
6270 s = bfd_get_linker_section
6271 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
6273 BFD_ASSERT (s != NULL);
6275 /* Add symbol for veneer. */
6277 bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
6279 BFD_ASSERT (tmp_name);
6281 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
6283 myh = elf_link_hash_lookup
6284 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
6286 BFD_ASSERT (myh == NULL);
6289 val = globals->bx_glue_size;
6290 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
6291 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
6292 NULL, TRUE, FALSE, &bh);
6294 myh = (struct elf_link_hash_entry *) bh;
6295 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6296 myh->forced_local = 1;
6298 s->size += ARM_BX_VENEER_SIZE;
6299 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
6300 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
6304 /* Add an entry to the code/data map for section SEC. */
6307 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
6309 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
6310 unsigned int newidx;
6312 if (sec_data->map == NULL)
6314 sec_data->map = (elf32_arm_section_map *)
6315 bfd_malloc (sizeof (elf32_arm_section_map));
6316 sec_data->mapcount = 0;
6317 sec_data->mapsize = 1;
6320 newidx = sec_data->mapcount++;
6322 if (sec_data->mapcount > sec_data->mapsize)
6324 sec_data->mapsize *= 2;
6325 sec_data->map = (elf32_arm_section_map *)
6326 bfd_realloc_or_free (sec_data->map, sec_data->mapsize
6327 * sizeof (elf32_arm_section_map));
6332 sec_data->map[newidx].vma = vma;
6333 sec_data->map[newidx].type = type;
6338 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
6339 veneers are handled for now. */
6342 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
6343 elf32_vfp11_erratum_list *branch,
6345 asection *branch_sec,
6346 unsigned int offset)
6349 struct elf32_arm_link_hash_table *hash_table;
6351 struct elf_link_hash_entry *myh;
6352 struct bfd_link_hash_entry *bh;
6354 struct _arm_elf_section_data *sec_data;
6355 elf32_vfp11_erratum_list *newerr;
6357 hash_table = elf32_arm_hash_table (link_info);
6358 BFD_ASSERT (hash_table != NULL);
6359 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
6361 s = bfd_get_linker_section
6362 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
6364 sec_data = elf32_arm_section_data (s);
6366 BFD_ASSERT (s != NULL);
6368 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
6369 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
6371 BFD_ASSERT (tmp_name);
6373 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
6374 hash_table->num_vfp11_fixes);
6376 myh = elf_link_hash_lookup
6377 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6379 BFD_ASSERT (myh == NULL);
6382 val = hash_table->vfp11_erratum_glue_size;
6383 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
6384 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
6385 NULL, TRUE, FALSE, &bh);
6387 myh = (struct elf_link_hash_entry *) bh;
6388 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6389 myh->forced_local = 1;
6391 /* Link veneer back to calling location. */
6392 sec_data->erratumcount += 1;
6393 newerr = (elf32_vfp11_erratum_list *)
6394 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
6396 newerr->type = VFP11_ERRATUM_ARM_VENEER;
6398 newerr->u.v.branch = branch;
6399 newerr->u.v.id = hash_table->num_vfp11_fixes;
6400 branch->u.b.veneer = newerr;
6402 newerr->next = sec_data->erratumlist;
6403 sec_data->erratumlist = newerr;
6405 /* A symbol for the return from the veneer. */
6406 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
6407 hash_table->num_vfp11_fixes);
6409 myh = elf_link_hash_lookup
6410 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6417 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
6418 branch_sec, val, NULL, TRUE, FALSE, &bh);
6420 myh = (struct elf_link_hash_entry *) bh;
6421 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6422 myh->forced_local = 1;
6426 /* Generate a mapping symbol for the veneer section, and explicitly add an
6427 entry for that symbol to the code/data map for the section. */
6428 if (hash_table->vfp11_erratum_glue_size == 0)
6431 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
6432 ever requires this erratum fix. */
6433 _bfd_generic_link_add_one_symbol (link_info,
6434 hash_table->bfd_of_glue_owner, "$a",
6435 BSF_LOCAL, s, 0, NULL,
6438 myh = (struct elf_link_hash_entry *) bh;
6439 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6440 myh->forced_local = 1;
6442 /* The elf32_arm_init_maps function only cares about symbols from input
6443 BFDs. We must make a note of this generated mapping symbol
6444 ourselves so that code byteswapping works properly in
6445 elf32_arm_write_section. */
6446 elf32_arm_section_map_add (s, 'a', 0);
6449 s->size += VFP11_ERRATUM_VENEER_SIZE;
6450 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
6451 hash_table->num_vfp11_fixes++;
6453 /* The offset of the veneer. */
6457 /* Record information about a STM32L4XX STM erratum veneer. Only THUMB-mode
6458 veneers need to be handled because used only in Cortex-M. */
6461 record_stm32l4xx_erratum_veneer (struct bfd_link_info *link_info,
6462 elf32_stm32l4xx_erratum_list *branch,
6464 asection *branch_sec,
6465 unsigned int offset,
6466 bfd_size_type veneer_size)
6469 struct elf32_arm_link_hash_table *hash_table;
6471 struct elf_link_hash_entry *myh;
6472 struct bfd_link_hash_entry *bh;
6474 struct _arm_elf_section_data *sec_data;
6475 elf32_stm32l4xx_erratum_list *newerr;
6477 hash_table = elf32_arm_hash_table (link_info);
6478 BFD_ASSERT (hash_table != NULL);
6479 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
6481 s = bfd_get_linker_section
6482 (hash_table->bfd_of_glue_owner, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
6484 BFD_ASSERT (s != NULL);
6486 sec_data = elf32_arm_section_data (s);
6488 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
6489 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
6491 BFD_ASSERT (tmp_name);
6493 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
6494 hash_table->num_stm32l4xx_fixes);
6496 myh = elf_link_hash_lookup
6497 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6499 BFD_ASSERT (myh == NULL);
6502 val = hash_table->stm32l4xx_erratum_glue_size;
6503 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
6504 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
6505 NULL, TRUE, FALSE, &bh);
6507 myh = (struct elf_link_hash_entry *) bh;
6508 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6509 myh->forced_local = 1;
6511 /* Link veneer back to calling location. */
6512 sec_data->stm32l4xx_erratumcount += 1;
6513 newerr = (elf32_stm32l4xx_erratum_list *)
6514 bfd_zmalloc (sizeof (elf32_stm32l4xx_erratum_list));
6516 newerr->type = STM32L4XX_ERRATUM_VENEER;
6518 newerr->u.v.branch = branch;
6519 newerr->u.v.id = hash_table->num_stm32l4xx_fixes;
6520 branch->u.b.veneer = newerr;
6522 newerr->next = sec_data->stm32l4xx_erratumlist;
6523 sec_data->stm32l4xx_erratumlist = newerr;
6525 /* A symbol for the return from the veneer. */
6526 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
6527 hash_table->num_stm32l4xx_fixes);
6529 myh = elf_link_hash_lookup
6530 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6537 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
6538 branch_sec, val, NULL, TRUE, FALSE, &bh);
6540 myh = (struct elf_link_hash_entry *) bh;
6541 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6542 myh->forced_local = 1;
6546 /* Generate a mapping symbol for the veneer section, and explicitly add an
6547 entry for that symbol to the code/data map for the section. */
6548 if (hash_table->stm32l4xx_erratum_glue_size == 0)
6551 /* Creates a THUMB symbol since there is no other choice. */
6552 _bfd_generic_link_add_one_symbol (link_info,
6553 hash_table->bfd_of_glue_owner, "$t",
6554 BSF_LOCAL, s, 0, NULL,
6557 myh = (struct elf_link_hash_entry *) bh;
6558 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6559 myh->forced_local = 1;
6561 /* The elf32_arm_init_maps function only cares about symbols from input
6562 BFDs. We must make a note of this generated mapping symbol
6563 ourselves so that code byteswapping works properly in
6564 elf32_arm_write_section. */
6565 elf32_arm_section_map_add (s, 't', 0);
6568 s->size += veneer_size;
6569 hash_table->stm32l4xx_erratum_glue_size += veneer_size;
6570 hash_table->num_stm32l4xx_fixes++;
6572 /* The offset of the veneer. */
6576 #define ARM_GLUE_SECTION_FLAGS \
6577 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
6578 | SEC_READONLY | SEC_LINKER_CREATED)
6580 /* Create a fake section for use by the ARM backend of the linker. */
6583 arm_make_glue_section (bfd * abfd, const char * name)
6587 sec = bfd_get_linker_section (abfd, name);
6592 sec = bfd_make_section_anyway_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
6595 || !bfd_set_section_alignment (abfd, sec, 2))
6598 /* Set the gc mark to prevent the section from being removed by garbage
6599 collection, despite the fact that no relocs refer to this section. */
6605 /* Set size of .plt entries. This function is called from the
6606 linker scripts in ld/emultempl/{armelf}.em. */
6609 bfd_elf32_arm_use_long_plt (void)
6611 elf32_arm_use_long_plt_entry = TRUE;
6614 /* Add the glue sections to ABFD. This function is called from the
6615 linker scripts in ld/emultempl/{armelf}.em. */
6618 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
6619 struct bfd_link_info *info)
6621 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
6622 bfd_boolean dostm32l4xx = globals
6623 && globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE;
6624 bfd_boolean addglue;
6626 /* If we are only performing a partial
6627 link do not bother adding the glue. */
6628 if (bfd_link_relocatable (info))
6631 addglue = arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
6632 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
6633 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
6634 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
6640 && arm_make_glue_section (abfd, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
6643 /* Mark output sections of veneers needing a dedicated one with SEC_KEEP. This
6644 ensures they are not marked for deletion by
6645 strip_excluded_output_sections () when veneers are going to be created
6646 later. Not doing so would trigger assert on empty section size in
6647 lang_size_sections_1 (). */
6650 bfd_elf32_arm_keep_private_stub_output_sections (struct bfd_link_info *info)
6652 enum elf32_arm_stub_type stub_type;
6654 /* If we are only performing a partial
6655 link do not bother adding the glue. */
6656 if (bfd_link_relocatable (info))
6659 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type; stub_type++)
6662 const char *out_sec_name;
6664 if (!arm_dedicated_stub_output_section_required (stub_type))
6667 out_sec_name = arm_dedicated_stub_output_section_name (stub_type);
6668 out_sec = bfd_get_section_by_name (info->output_bfd, out_sec_name);
6669 if (out_sec != NULL)
6670 out_sec->flags |= SEC_KEEP;
6674 /* Select a BFD to be used to hold the sections used by the glue code.
6675 This function is called from the linker scripts in ld/emultempl/
6679 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
6681 struct elf32_arm_link_hash_table *globals;
6683 /* If we are only performing a partial link
6684 do not bother getting a bfd to hold the glue. */
6685 if (bfd_link_relocatable (info))
6688 /* Make sure we don't attach the glue sections to a dynamic object. */
6689 BFD_ASSERT (!(abfd->flags & DYNAMIC));
6691 globals = elf32_arm_hash_table (info);
6692 BFD_ASSERT (globals != NULL);
6694 if (globals->bfd_of_glue_owner != NULL)
6697 /* Save the bfd for later use. */
6698 globals->bfd_of_glue_owner = abfd;
6704 check_use_blx (struct elf32_arm_link_hash_table *globals)
6708 cpu_arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
6711 if (globals->fix_arm1176)
6713 if (cpu_arch == TAG_CPU_ARCH_V6T2 || cpu_arch > TAG_CPU_ARCH_V6K)
6714 globals->use_blx = 1;
6718 if (cpu_arch > TAG_CPU_ARCH_V4T)
6719 globals->use_blx = 1;
6724 bfd_elf32_arm_process_before_allocation (bfd *abfd,
6725 struct bfd_link_info *link_info)
6727 Elf_Internal_Shdr *symtab_hdr;
6728 Elf_Internal_Rela *internal_relocs = NULL;
6729 Elf_Internal_Rela *irel, *irelend;
6730 bfd_byte *contents = NULL;
6733 struct elf32_arm_link_hash_table *globals;
6735 /* If we are only performing a partial link do not bother
6736 to construct any glue. */
6737 if (bfd_link_relocatable (link_info))
6740 /* Here we have a bfd that is to be included on the link. We have a
6741 hook to do reloc rummaging, before section sizes are nailed down. */
6742 globals = elf32_arm_hash_table (link_info);
6743 BFD_ASSERT (globals != NULL);
6745 check_use_blx (globals);
6747 if (globals->byteswap_code && !bfd_big_endian (abfd))
6749 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
6754 /* PR 5398: If we have not decided to include any loadable sections in
6755 the output then we will not have a glue owner bfd. This is OK, it
6756 just means that there is nothing else for us to do here. */
6757 if (globals->bfd_of_glue_owner == NULL)
6760 /* Rummage around all the relocs and map the glue vectors. */
6761 sec = abfd->sections;
6766 for (; sec != NULL; sec = sec->next)
6768 if (sec->reloc_count == 0)
6771 if ((sec->flags & SEC_EXCLUDE) != 0)
6774 symtab_hdr = & elf_symtab_hdr (abfd);
6776 /* Load the relocs. */
6778 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
6780 if (internal_relocs == NULL)
6783 irelend = internal_relocs + sec->reloc_count;
6784 for (irel = internal_relocs; irel < irelend; irel++)
6787 unsigned long r_index;
6789 struct elf_link_hash_entry *h;
6791 r_type = ELF32_R_TYPE (irel->r_info);
6792 r_index = ELF32_R_SYM (irel->r_info);
6794 /* These are the only relocation types we care about. */
6795 if ( r_type != R_ARM_PC24
6796 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
6799 /* Get the section contents if we haven't done so already. */
6800 if (contents == NULL)
6802 /* Get cached copy if it exists. */
6803 if (elf_section_data (sec)->this_hdr.contents != NULL)
6804 contents = elf_section_data (sec)->this_hdr.contents;
6807 /* Go get them off disk. */
6808 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
6813 if (r_type == R_ARM_V4BX)
6817 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
6818 record_arm_bx_glue (link_info, reg);
6822 /* If the relocation is not against a symbol it cannot concern us. */
6825 /* We don't care about local symbols. */
6826 if (r_index < symtab_hdr->sh_info)
6829 /* This is an external symbol. */
6830 r_index -= symtab_hdr->sh_info;
6831 h = (struct elf_link_hash_entry *)
6832 elf_sym_hashes (abfd)[r_index];
6834 /* If the relocation is against a static symbol it must be within
6835 the current section and so cannot be a cross ARM/Thumb relocation. */
6839 /* If the call will go through a PLT entry then we do not need
6841 if (globals->root.splt != NULL && h->plt.offset != (bfd_vma) -1)
6847 /* This one is a call from arm code. We need to look up
6848 the target of the call. If it is a thumb target, we
6850 if (ARM_GET_SYM_BRANCH_TYPE (h->target_internal)
6851 == ST_BRANCH_TO_THUMB)
6852 record_arm_to_thumb_glue (link_info, h);
6860 if (contents != NULL
6861 && elf_section_data (sec)->this_hdr.contents != contents)
6865 if (internal_relocs != NULL
6866 && elf_section_data (sec)->relocs != internal_relocs)
6867 free (internal_relocs);
6868 internal_relocs = NULL;
6874 if (contents != NULL
6875 && elf_section_data (sec)->this_hdr.contents != contents)
6877 if (internal_relocs != NULL
6878 && elf_section_data (sec)->relocs != internal_relocs)
6879 free (internal_relocs);
6886 /* Initialise maps of ARM/Thumb/data for input BFDs. */
6889 bfd_elf32_arm_init_maps (bfd *abfd)
6891 Elf_Internal_Sym *isymbuf;
6892 Elf_Internal_Shdr *hdr;
6893 unsigned int i, localsyms;
6895 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
6896 if (! is_arm_elf (abfd))
6899 if ((abfd->flags & DYNAMIC) != 0)
6902 hdr = & elf_symtab_hdr (abfd);
6903 localsyms = hdr->sh_info;
6905 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
6906 should contain the number of local symbols, which should come before any
6907 global symbols. Mapping symbols are always local. */
6908 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
6911 /* No internal symbols read? Skip this BFD. */
6912 if (isymbuf == NULL)
6915 for (i = 0; i < localsyms; i++)
6917 Elf_Internal_Sym *isym = &isymbuf[i];
6918 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6922 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
6924 name = bfd_elf_string_from_elf_section (abfd,
6925 hdr->sh_link, isym->st_name);
6927 if (bfd_is_arm_special_symbol_name (name,
6928 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
6929 elf32_arm_section_map_add (sec, name[1], isym->st_value);
6935 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
6936 say what they wanted. */
6939 bfd_elf32_arm_set_cortex_a8_fix (bfd *obfd, struct bfd_link_info *link_info)
6941 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6942 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
6944 if (globals == NULL)
6947 if (globals->fix_cortex_a8 == -1)
6949 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
6950 if (out_attr[Tag_CPU_arch].i == TAG_CPU_ARCH_V7
6951 && (out_attr[Tag_CPU_arch_profile].i == 'A'
6952 || out_attr[Tag_CPU_arch_profile].i == 0))
6953 globals->fix_cortex_a8 = 1;
6955 globals->fix_cortex_a8 = 0;
6961 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
6963 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6964 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
6966 if (globals == NULL)
6968 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
6969 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
6971 switch (globals->vfp11_fix)
6973 case BFD_ARM_VFP11_FIX_DEFAULT:
6974 case BFD_ARM_VFP11_FIX_NONE:
6975 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
6979 /* Give a warning, but do as the user requests anyway. */
6980 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
6981 "workaround is not necessary for target architecture"), obfd);
6984 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
6985 /* For earlier architectures, we might need the workaround, but do not
6986 enable it by default. If users is running with broken hardware, they
6987 must enable the erratum fix explicitly. */
6988 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
6992 bfd_elf32_arm_set_stm32l4xx_fix (bfd *obfd, struct bfd_link_info *link_info)
6994 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6995 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
6997 if (globals == NULL)
7000 /* We assume only Cortex-M4 may require the fix. */
7001 if (out_attr[Tag_CPU_arch].i != TAG_CPU_ARCH_V7E_M
7002 || out_attr[Tag_CPU_arch_profile].i != 'M')
7004 if (globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE)
7005 /* Give a warning, but do as the user requests anyway. */
7006 (*_bfd_error_handler)
7007 (_("%B: warning: selected STM32L4XX erratum "
7008 "workaround is not necessary for target architecture"), obfd);
7012 enum bfd_arm_vfp11_pipe
7020 /* Return a VFP register number. This is encoded as RX:X for single-precision
7021 registers, or X:RX for double-precision registers, where RX is the group of
7022 four bits in the instruction encoding and X is the single extension bit.
7023 RX and X fields are specified using their lowest (starting) bit. The return
7026 0...31: single-precision registers s0...s31
7027 32...63: double-precision registers d0...d31.
7029 Although X should be zero for VFP11 (encoding d0...d15 only), we might
7030 encounter VFP3 instructions, so we allow the full range for DP registers. */
7033 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
7037 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
7039 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
7042 /* Set bits in *WMASK according to a register number REG as encoded by
7043 bfd_arm_vfp11_regno(). Ignore d16-d31. */
7046 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
7051 *wmask |= 3 << ((reg - 32) * 2);
7054 /* Return TRUE if WMASK overwrites anything in REGS. */
7057 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
7061 for (i = 0; i < numregs; i++)
7063 unsigned int reg = regs[i];
7065 if (reg < 32 && (wmask & (1 << reg)) != 0)
7073 if ((wmask & (3 << (reg * 2))) != 0)
7080 /* In this function, we're interested in two things: finding input registers
7081 for VFP data-processing instructions, and finding the set of registers which
7082 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
7083 hold the written set, so FLDM etc. are easy to deal with (we're only
7084 interested in 32 SP registers or 16 dp registers, due to the VFP version
7085 implemented by the chip in question). DP registers are marked by setting
7086 both SP registers in the write mask). */
7088 static enum bfd_arm_vfp11_pipe
7089 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
7092 enum bfd_arm_vfp11_pipe vpipe = VFP11_BAD;
7093 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
7095 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
7098 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
7099 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
7101 pqrs = ((insn & 0x00800000) >> 20)
7102 | ((insn & 0x00300000) >> 19)
7103 | ((insn & 0x00000040) >> 6);
7107 case 0: /* fmac[sd]. */
7108 case 1: /* fnmac[sd]. */
7109 case 2: /* fmsc[sd]. */
7110 case 3: /* fnmsc[sd]. */
7112 bfd_arm_vfp11_write_mask (destmask, fd);
7114 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
7119 case 4: /* fmul[sd]. */
7120 case 5: /* fnmul[sd]. */
7121 case 6: /* fadd[sd]. */
7122 case 7: /* fsub[sd]. */
7126 case 8: /* fdiv[sd]. */
7129 bfd_arm_vfp11_write_mask (destmask, fd);
7130 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
7135 case 15: /* extended opcode. */
7137 unsigned int extn = ((insn >> 15) & 0x1e)
7138 | ((insn >> 7) & 1);
7142 case 0: /* fcpy[sd]. */
7143 case 1: /* fabs[sd]. */
7144 case 2: /* fneg[sd]. */
7145 case 8: /* fcmp[sd]. */
7146 case 9: /* fcmpe[sd]. */
7147 case 10: /* fcmpz[sd]. */
7148 case 11: /* fcmpez[sd]. */
7149 case 16: /* fuito[sd]. */
7150 case 17: /* fsito[sd]. */
7151 case 24: /* ftoui[sd]. */
7152 case 25: /* ftouiz[sd]. */
7153 case 26: /* ftosi[sd]. */
7154 case 27: /* ftosiz[sd]. */
7155 /* These instructions will not bounce due to underflow. */
7160 case 3: /* fsqrt[sd]. */
7161 /* fsqrt cannot underflow, but it can (perhaps) overwrite
7162 registers to cause the erratum in previous instructions. */
7163 bfd_arm_vfp11_write_mask (destmask, fd);
7167 case 15: /* fcvt{ds,sd}. */
7171 bfd_arm_vfp11_write_mask (destmask, fd);
7173 /* Only FCVTSD can underflow. */
7174 if ((insn & 0x100) != 0)
7193 /* Two-register transfer. */
7194 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
7196 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
7198 if ((insn & 0x100000) == 0)
7201 bfd_arm_vfp11_write_mask (destmask, fm);
7204 bfd_arm_vfp11_write_mask (destmask, fm);
7205 bfd_arm_vfp11_write_mask (destmask, fm + 1);
7211 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
7213 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
7214 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
7218 case 0: /* Two-reg transfer. We should catch these above. */
7221 case 2: /* fldm[sdx]. */
7225 unsigned int i, offset = insn & 0xff;
7230 for (i = fd; i < fd + offset; i++)
7231 bfd_arm_vfp11_write_mask (destmask, i);
7235 case 4: /* fld[sd]. */
7237 bfd_arm_vfp11_write_mask (destmask, fd);
7246 /* Single-register transfer. Note L==0. */
7247 else if ((insn & 0x0f100e10) == 0x0e000a10)
7249 unsigned int opcode = (insn >> 21) & 7;
7250 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
7254 case 0: /* fmsr/fmdlr. */
7255 case 1: /* fmdhr. */
7256 /* Mark fmdhr and fmdlr as writing to the whole of the DP
7257 destination register. I don't know if this is exactly right,
7258 but it is the conservative choice. */
7259 bfd_arm_vfp11_write_mask (destmask, fn);
7273 static int elf32_arm_compare_mapping (const void * a, const void * b);
7276 /* Look for potentially-troublesome code sequences which might trigger the
7277 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
7278 (available from ARM) for details of the erratum. A short version is
7279 described in ld.texinfo. */
7282 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
7285 bfd_byte *contents = NULL;
7287 int regs[3], numregs = 0;
7288 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7289 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
7291 if (globals == NULL)
7294 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
7295 The states transition as follows:
7297 0 -> 1 (vector) or 0 -> 2 (scalar)
7298 A VFP FMAC-pipeline instruction has been seen. Fill
7299 regs[0]..regs[numregs-1] with its input operands. Remember this
7300 instruction in 'first_fmac'.
7303 Any instruction, except for a VFP instruction which overwrites
7308 A VFP instruction has been seen which overwrites any of regs[*].
7309 We must make a veneer! Reset state to 0 before examining next
7313 If we fail to match anything in state 2, reset to state 0 and reset
7314 the instruction pointer to the instruction after 'first_fmac'.
7316 If the VFP11 vector mode is in use, there must be at least two unrelated
7317 instructions between anti-dependent VFP11 instructions to properly avoid
7318 triggering the erratum, hence the use of the extra state 1. */
7320 /* If we are only performing a partial link do not bother
7321 to construct any glue. */
7322 if (bfd_link_relocatable (link_info))
7325 /* Skip if this bfd does not correspond to an ELF image. */
7326 if (! is_arm_elf (abfd))
7329 /* We should have chosen a fix type by the time we get here. */
7330 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
7332 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
7335 /* Skip this BFD if it corresponds to an executable or dynamic object. */
7336 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
7339 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7341 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
7342 struct _arm_elf_section_data *sec_data;
7344 /* If we don't have executable progbits, we're not interested in this
7345 section. Also skip if section is to be excluded. */
7346 if (elf_section_type (sec) != SHT_PROGBITS
7347 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
7348 || (sec->flags & SEC_EXCLUDE) != 0
7349 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
7350 || sec->output_section == bfd_abs_section_ptr
7351 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
7354 sec_data = elf32_arm_section_data (sec);
7356 if (sec_data->mapcount == 0)
7359 if (elf_section_data (sec)->this_hdr.contents != NULL)
7360 contents = elf_section_data (sec)->this_hdr.contents;
7361 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
7364 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
7365 elf32_arm_compare_mapping);
7367 for (span = 0; span < sec_data->mapcount; span++)
7369 unsigned int span_start = sec_data->map[span].vma;
7370 unsigned int span_end = (span == sec_data->mapcount - 1)
7371 ? sec->size : sec_data->map[span + 1].vma;
7372 char span_type = sec_data->map[span].type;
7374 /* FIXME: Only ARM mode is supported at present. We may need to
7375 support Thumb-2 mode also at some point. */
7376 if (span_type != 'a')
7379 for (i = span_start; i < span_end;)
7381 unsigned int next_i = i + 4;
7382 unsigned int insn = bfd_big_endian (abfd)
7383 ? (contents[i] << 24)
7384 | (contents[i + 1] << 16)
7385 | (contents[i + 2] << 8)
7387 : (contents[i + 3] << 24)
7388 | (contents[i + 2] << 16)
7389 | (contents[i + 1] << 8)
7391 unsigned int writemask = 0;
7392 enum bfd_arm_vfp11_pipe vpipe;
7397 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
7399 /* I'm assuming the VFP11 erratum can trigger with denorm
7400 operands on either the FMAC or the DS pipeline. This might
7401 lead to slightly overenthusiastic veneer insertion. */
7402 if (vpipe == VFP11_FMAC || vpipe == VFP11_DS)
7404 state = use_vector ? 1 : 2;
7406 veneer_of_insn = insn;
7412 int other_regs[3], other_numregs;
7413 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
7416 if (vpipe != VFP11_BAD
7417 && bfd_arm_vfp11_antidependency (writemask, regs,
7427 int other_regs[3], other_numregs;
7428 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
7431 if (vpipe != VFP11_BAD
7432 && bfd_arm_vfp11_antidependency (writemask, regs,
7438 next_i = first_fmac + 4;
7444 abort (); /* Should be unreachable. */
7449 elf32_vfp11_erratum_list *newerr =(elf32_vfp11_erratum_list *)
7450 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
7452 elf32_arm_section_data (sec)->erratumcount += 1;
7454 newerr->u.b.vfp_insn = veneer_of_insn;
7459 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
7466 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
7471 newerr->next = sec_data->erratumlist;
7472 sec_data->erratumlist = newerr;
7481 if (contents != NULL
7482 && elf_section_data (sec)->this_hdr.contents != contents)
7490 if (contents != NULL
7491 && elf_section_data (sec)->this_hdr.contents != contents)
7497 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
7498 after sections have been laid out, using specially-named symbols. */
7501 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
7502 struct bfd_link_info *link_info)
7505 struct elf32_arm_link_hash_table *globals;
7508 if (bfd_link_relocatable (link_info))
7511 /* Skip if this bfd does not correspond to an ELF image. */
7512 if (! is_arm_elf (abfd))
7515 globals = elf32_arm_hash_table (link_info);
7516 if (globals == NULL)
7519 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7520 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
7522 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7524 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
7525 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
7527 for (; errnode != NULL; errnode = errnode->next)
7529 struct elf_link_hash_entry *myh;
7532 switch (errnode->type)
7534 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
7535 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
7536 /* Find veneer symbol. */
7537 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
7538 errnode->u.b.veneer->u.v.id);
7540 myh = elf_link_hash_lookup
7541 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7544 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
7545 "`%s'"), abfd, tmp_name);
7547 vma = myh->root.u.def.section->output_section->vma
7548 + myh->root.u.def.section->output_offset
7549 + myh->root.u.def.value;
7551 errnode->u.b.veneer->vma = vma;
7554 case VFP11_ERRATUM_ARM_VENEER:
7555 case VFP11_ERRATUM_THUMB_VENEER:
7556 /* Find return location. */
7557 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
7560 myh = elf_link_hash_lookup
7561 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7564 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
7565 "`%s'"), abfd, tmp_name);
7567 vma = myh->root.u.def.section->output_section->vma
7568 + myh->root.u.def.section->output_offset
7569 + myh->root.u.def.value;
7571 errnode->u.v.branch->vma = vma;
7583 /* Find virtual-memory addresses for STM32L4XX erratum veneers and
7584 return locations after sections have been laid out, using
7585 specially-named symbols. */
7588 bfd_elf32_arm_stm32l4xx_fix_veneer_locations (bfd *abfd,
7589 struct bfd_link_info *link_info)
7592 struct elf32_arm_link_hash_table *globals;
7595 if (bfd_link_relocatable (link_info))
7598 /* Skip if this bfd does not correspond to an ELF image. */
7599 if (! is_arm_elf (abfd))
7602 globals = elf32_arm_hash_table (link_info);
7603 if (globals == NULL)
7606 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7607 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
7609 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7611 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
7612 elf32_stm32l4xx_erratum_list *errnode = sec_data->stm32l4xx_erratumlist;
7614 for (; errnode != NULL; errnode = errnode->next)
7616 struct elf_link_hash_entry *myh;
7619 switch (errnode->type)
7621 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
7622 /* Find veneer symbol. */
7623 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
7624 errnode->u.b.veneer->u.v.id);
7626 myh = elf_link_hash_lookup
7627 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7630 (*_bfd_error_handler) (_("%B: unable to find STM32L4XX veneer "
7631 "`%s'"), abfd, tmp_name);
7633 vma = myh->root.u.def.section->output_section->vma
7634 + myh->root.u.def.section->output_offset
7635 + myh->root.u.def.value;
7637 errnode->u.b.veneer->vma = vma;
7640 case STM32L4XX_ERRATUM_VENEER:
7641 /* Find return location. */
7642 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
7645 myh = elf_link_hash_lookup
7646 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7649 (*_bfd_error_handler) (_("%B: unable to find STM32L4XX veneer "
7650 "`%s'"), abfd, tmp_name);
7652 vma = myh->root.u.def.section->output_section->vma
7653 + myh->root.u.def.section->output_offset
7654 + myh->root.u.def.value;
7656 errnode->u.v.branch->vma = vma;
7668 static inline bfd_boolean
7669 is_thumb2_ldmia (const insn32 insn)
7671 /* Encoding T2: LDM<c>.W <Rn>{!},<registers>
7672 1110 - 1000 - 10W1 - rrrr - PM (0) l - llll - llll - llll. */
7673 return (insn & 0xffd02000) == 0xe8900000;
7676 static inline bfd_boolean
7677 is_thumb2_ldmdb (const insn32 insn)
7679 /* Encoding T1: LDMDB<c> <Rn>{!},<registers>
7680 1110 - 1001 - 00W1 - rrrr - PM (0) l - llll - llll - llll. */
7681 return (insn & 0xffd02000) == 0xe9100000;
7684 static inline bfd_boolean
7685 is_thumb2_vldm (const insn32 insn)
7687 /* A6.5 Extension register load or store instruction
7689 We look for SP 32-bit and DP 64-bit registers.
7690 Encoding T1 VLDM{mode}<c> <Rn>{!}, <list>
7691 <list> is consecutive 64-bit registers
7692 1110 - 110P - UDW1 - rrrr - vvvv - 1011 - iiii - iiii
7693 Encoding T2 VLDM{mode}<c> <Rn>{!}, <list>
7694 <list> is consecutive 32-bit registers
7695 1110 - 110P - UDW1 - rrrr - vvvv - 1010 - iiii - iiii
7696 if P==0 && U==1 && W==1 && Rn=1101 VPOP
7697 if PUW=010 || PUW=011 || PUW=101 VLDM. */
7699 (((insn & 0xfe100f00) == 0xec100b00) ||
7700 ((insn & 0xfe100f00) == 0xec100a00))
7701 && /* (IA without !). */
7702 (((((insn << 7) >> 28) & 0xd) == 0x4)
7703 /* (IA with !), includes VPOP (when reg number is SP). */
7704 || ((((insn << 7) >> 28) & 0xd) == 0x5)
7706 || ((((insn << 7) >> 28) & 0xd) == 0x9));
7709 /* STM STM32L4XX erratum : This function assumes that it receives an LDM or
7711 - computes the number and the mode of memory accesses
7712 - decides if the replacement should be done:
7713 . replaces only if > 8-word accesses
7714 . or (testing purposes only) replaces all accesses. */
7717 stm32l4xx_need_create_replacing_stub (const insn32 insn,
7718 bfd_arm_stm32l4xx_fix stm32l4xx_fix)
7722 /* The field encoding the register list is the same for both LDMIA
7723 and LDMDB encodings. */
7724 if (is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn))
7725 nb_words = popcount (insn & 0x0000ffff);
7726 else if (is_thumb2_vldm (insn))
7727 nb_words = (insn & 0xff);
7729 /* DEFAULT mode accounts for the real bug condition situation,
7730 ALL mode inserts stubs for each LDM/VLDM instruction (testing). */
7732 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_DEFAULT) ? nb_words > 8 :
7733 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_ALL) ? TRUE : FALSE;
7736 /* Look for potentially-troublesome code sequences which might trigger
7737 the STM STM32L4XX erratum. */
7740 bfd_elf32_arm_stm32l4xx_erratum_scan (bfd *abfd,
7741 struct bfd_link_info *link_info)
7744 bfd_byte *contents = NULL;
7745 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7747 if (globals == NULL)
7750 /* If we are only performing a partial link do not bother
7751 to construct any glue. */
7752 if (bfd_link_relocatable (link_info))
7755 /* Skip if this bfd does not correspond to an ELF image. */
7756 if (! is_arm_elf (abfd))
7759 if (globals->stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_NONE)
7762 /* Skip this BFD if it corresponds to an executable or dynamic object. */
7763 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
7766 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7768 unsigned int i, span;
7769 struct _arm_elf_section_data *sec_data;
7771 /* If we don't have executable progbits, we're not interested in this
7772 section. Also skip if section is to be excluded. */
7773 if (elf_section_type (sec) != SHT_PROGBITS
7774 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
7775 || (sec->flags & SEC_EXCLUDE) != 0
7776 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
7777 || sec->output_section == bfd_abs_section_ptr
7778 || strcmp (sec->name, STM32L4XX_ERRATUM_VENEER_SECTION_NAME) == 0)
7781 sec_data = elf32_arm_section_data (sec);
7783 if (sec_data->mapcount == 0)
7786 if (elf_section_data (sec)->this_hdr.contents != NULL)
7787 contents = elf_section_data (sec)->this_hdr.contents;
7788 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
7791 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
7792 elf32_arm_compare_mapping);
7794 for (span = 0; span < sec_data->mapcount; span++)
7796 unsigned int span_start = sec_data->map[span].vma;
7797 unsigned int span_end = (span == sec_data->mapcount - 1)
7798 ? sec->size : sec_data->map[span + 1].vma;
7799 char span_type = sec_data->map[span].type;
7800 int itblock_current_pos = 0;
7802 /* Only Thumb2 mode need be supported with this CM4 specific
7803 code, we should not encounter any arm mode eg span_type
7805 if (span_type != 't')
7808 for (i = span_start; i < span_end;)
7810 unsigned int insn = bfd_get_16 (abfd, &contents[i]);
7811 bfd_boolean insn_32bit = FALSE;
7812 bfd_boolean is_ldm = FALSE;
7813 bfd_boolean is_vldm = FALSE;
7814 bfd_boolean is_not_last_in_it_block = FALSE;
7816 /* The first 16-bits of all 32-bit thumb2 instructions start
7817 with opcode[15..13]=0b111 and the encoded op1 can be anything
7818 except opcode[12..11]!=0b00.
7819 See 32-bit Thumb instruction encoding. */
7820 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
7823 /* Compute the predicate that tells if the instruction
7824 is concerned by the IT block
7825 - Creates an error if there is a ldm that is not
7826 last in the IT block thus cannot be replaced
7827 - Otherwise we can create a branch at the end of the
7828 IT block, it will be controlled naturally by IT
7829 with the proper pseudo-predicate
7830 - So the only interesting predicate is the one that
7831 tells that we are not on the last item of an IT
7833 if (itblock_current_pos != 0)
7834 is_not_last_in_it_block = !!--itblock_current_pos;
7838 /* Load the rest of the insn (in manual-friendly order). */
7839 insn = (insn << 16) | bfd_get_16 (abfd, &contents[i + 2]);
7840 is_ldm = is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn);
7841 is_vldm = is_thumb2_vldm (insn);
7843 /* Veneers are created for (v)ldm depending on
7844 option flags and memory accesses conditions; but
7845 if the instruction is not the last instruction of
7846 an IT block, we cannot create a jump there, so we
7848 if ((is_ldm || is_vldm) &&
7849 stm32l4xx_need_create_replacing_stub
7850 (insn, globals->stm32l4xx_fix))
7852 if (is_not_last_in_it_block)
7854 (*_bfd_error_handler)
7855 /* Note - overlong line used here to allow for translation. */
7857 %B(%A+0x%lx): error: multiple load detected in non-last IT block instruction : STM32L4XX veneer cannot be generated.\n"
7858 "Use gcc option -mrestrict-it to generate only one instruction per IT block.\n"),
7859 abfd, sec, (long)i);
7863 elf32_stm32l4xx_erratum_list *newerr =
7864 (elf32_stm32l4xx_erratum_list *)
7866 (sizeof (elf32_stm32l4xx_erratum_list));
7868 elf32_arm_section_data (sec)
7869 ->stm32l4xx_erratumcount += 1;
7870 newerr->u.b.insn = insn;
7871 /* We create only thumb branches. */
7873 STM32L4XX_ERRATUM_BRANCH_TO_VENEER;
7874 record_stm32l4xx_erratum_veneer
7875 (link_info, newerr, abfd, sec,
7878 STM32L4XX_ERRATUM_LDM_VENEER_SIZE:
7879 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
7881 newerr->next = sec_data->stm32l4xx_erratumlist;
7882 sec_data->stm32l4xx_erratumlist = newerr;
7889 IT blocks are only encoded in T1
7890 Encoding T1: IT{x{y{z}}} <firstcond>
7891 1 0 1 1 - 1 1 1 1 - firstcond - mask
7892 if mask = '0000' then see 'related encodings'
7893 We don't deal with UNPREDICTABLE, just ignore these.
7894 There can be no nested IT blocks so an IT block
7895 is naturally a new one for which it is worth
7896 computing its size. */
7897 bfd_boolean is_newitblock = ((insn & 0xff00) == 0xbf00) &&
7898 ((insn & 0x000f) != 0x0000);
7899 /* If we have a new IT block we compute its size. */
7902 /* Compute the number of instructions controlled
7903 by the IT block, it will be used to decide
7904 whether we are inside an IT block or not. */
7905 unsigned int mask = insn & 0x000f;
7906 itblock_current_pos = 4 - ctz (mask);
7910 i += insn_32bit ? 4 : 2;
7914 if (contents != NULL
7915 && elf_section_data (sec)->this_hdr.contents != contents)
7923 if (contents != NULL
7924 && elf_section_data (sec)->this_hdr.contents != contents)
7930 /* Set target relocation values needed during linking. */
7933 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
7934 struct bfd_link_info *link_info,
7936 char * target2_type,
7939 bfd_arm_vfp11_fix vfp11_fix,
7940 bfd_arm_stm32l4xx_fix stm32l4xx_fix,
7941 int no_enum_warn, int no_wchar_warn,
7942 int pic_veneer, int fix_cortex_a8,
7945 struct elf32_arm_link_hash_table *globals;
7947 globals = elf32_arm_hash_table (link_info);
7948 if (globals == NULL)
7951 globals->target1_is_rel = target1_is_rel;
7952 if (strcmp (target2_type, "rel") == 0)
7953 globals->target2_reloc = R_ARM_REL32;
7954 else if (strcmp (target2_type, "abs") == 0)
7955 globals->target2_reloc = R_ARM_ABS32;
7956 else if (strcmp (target2_type, "got-rel") == 0)
7957 globals->target2_reloc = R_ARM_GOT_PREL;
7960 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
7963 globals->fix_v4bx = fix_v4bx;
7964 globals->use_blx |= use_blx;
7965 globals->vfp11_fix = vfp11_fix;
7966 globals->stm32l4xx_fix = stm32l4xx_fix;
7967 globals->pic_veneer = pic_veneer;
7968 globals->fix_cortex_a8 = fix_cortex_a8;
7969 globals->fix_arm1176 = fix_arm1176;
7971 BFD_ASSERT (is_arm_elf (output_bfd));
7972 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
7973 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
7976 /* Replace the target offset of a Thumb bl or b.w instruction. */
7979 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
7985 BFD_ASSERT ((offset & 1) == 0);
7987 upper = bfd_get_16 (abfd, insn);
7988 lower = bfd_get_16 (abfd, insn + 2);
7989 reloc_sign = (offset < 0) ? 1 : 0;
7990 upper = (upper & ~(bfd_vma) 0x7ff)
7991 | ((offset >> 12) & 0x3ff)
7992 | (reloc_sign << 10);
7993 lower = (lower & ~(bfd_vma) 0x2fff)
7994 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
7995 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
7996 | ((offset >> 1) & 0x7ff);
7997 bfd_put_16 (abfd, upper, insn);
7998 bfd_put_16 (abfd, lower, insn + 2);
8001 /* Thumb code calling an ARM function. */
8004 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
8008 asection * input_section,
8009 bfd_byte * hit_data,
8012 bfd_signed_vma addend,
8014 char **error_message)
8018 long int ret_offset;
8019 struct elf_link_hash_entry * myh;
8020 struct elf32_arm_link_hash_table * globals;
8022 myh = find_thumb_glue (info, name, error_message);
8026 globals = elf32_arm_hash_table (info);
8027 BFD_ASSERT (globals != NULL);
8028 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8030 my_offset = myh->root.u.def.value;
8032 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8033 THUMB2ARM_GLUE_SECTION_NAME);
8035 BFD_ASSERT (s != NULL);
8036 BFD_ASSERT (s->contents != NULL);
8037 BFD_ASSERT (s->output_section != NULL);
8039 if ((my_offset & 0x01) == 0x01)
8042 && sym_sec->owner != NULL
8043 && !INTERWORK_FLAG (sym_sec->owner))
8045 (*_bfd_error_handler)
8046 (_("%B(%s): warning: interworking not enabled.\n"
8047 " first occurrence: %B: Thumb call to ARM"),
8048 sym_sec->owner, input_bfd, name);
8054 myh->root.u.def.value = my_offset;
8056 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
8057 s->contents + my_offset);
8059 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
8060 s->contents + my_offset + 2);
8063 /* Address of destination of the stub. */
8064 ((bfd_signed_vma) val)
8066 /* Offset from the start of the current section
8067 to the start of the stubs. */
8069 /* Offset of the start of this stub from the start of the stubs. */
8071 /* Address of the start of the current section. */
8072 + s->output_section->vma)
8073 /* The branch instruction is 4 bytes into the stub. */
8075 /* ARM branches work from the pc of the instruction + 8. */
8078 put_arm_insn (globals, output_bfd,
8079 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
8080 s->contents + my_offset + 4);
8083 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
8085 /* Now go back and fix up the original BL insn to point to here. */
8087 /* Address of where the stub is located. */
8088 (s->output_section->vma + s->output_offset + my_offset)
8089 /* Address of where the BL is located. */
8090 - (input_section->output_section->vma + input_section->output_offset
8092 /* Addend in the relocation. */
8094 /* Biassing for PC-relative addressing. */
8097 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
8102 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
8104 static struct elf_link_hash_entry *
8105 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
8112 char ** error_message)
8115 long int ret_offset;
8116 struct elf_link_hash_entry * myh;
8117 struct elf32_arm_link_hash_table * globals;
8119 myh = find_arm_glue (info, name, error_message);
8123 globals = elf32_arm_hash_table (info);
8124 BFD_ASSERT (globals != NULL);
8125 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8127 my_offset = myh->root.u.def.value;
8129 if ((my_offset & 0x01) == 0x01)
8132 && sym_sec->owner != NULL
8133 && !INTERWORK_FLAG (sym_sec->owner))
8135 (*_bfd_error_handler)
8136 (_("%B(%s): warning: interworking not enabled.\n"
8137 " first occurrence: %B: arm call to thumb"),
8138 sym_sec->owner, input_bfd, name);
8142 myh->root.u.def.value = my_offset;
8144 if (bfd_link_pic (info)
8145 || globals->root.is_relocatable_executable
8146 || globals->pic_veneer)
8148 /* For relocatable objects we can't use absolute addresses,
8149 so construct the address from a relative offset. */
8150 /* TODO: If the offset is small it's probably worth
8151 constructing the address with adds. */
8152 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
8153 s->contents + my_offset);
8154 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
8155 s->contents + my_offset + 4);
8156 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
8157 s->contents + my_offset + 8);
8158 /* Adjust the offset by 4 for the position of the add,
8159 and 8 for the pipeline offset. */
8160 ret_offset = (val - (s->output_offset
8161 + s->output_section->vma
8164 bfd_put_32 (output_bfd, ret_offset,
8165 s->contents + my_offset + 12);
8167 else if (globals->use_blx)
8169 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
8170 s->contents + my_offset);
8172 /* It's a thumb address. Add the low order bit. */
8173 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
8174 s->contents + my_offset + 4);
8178 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
8179 s->contents + my_offset);
8181 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
8182 s->contents + my_offset + 4);
8184 /* It's a thumb address. Add the low order bit. */
8185 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
8186 s->contents + my_offset + 8);
8192 BFD_ASSERT (my_offset <= globals->arm_glue_size);
8197 /* Arm code calling a Thumb function. */
8200 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
8204 asection * input_section,
8205 bfd_byte * hit_data,
8208 bfd_signed_vma addend,
8210 char **error_message)
8212 unsigned long int tmp;
8215 long int ret_offset;
8216 struct elf_link_hash_entry * myh;
8217 struct elf32_arm_link_hash_table * globals;
8219 globals = elf32_arm_hash_table (info);
8220 BFD_ASSERT (globals != NULL);
8221 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8223 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8224 ARM2THUMB_GLUE_SECTION_NAME);
8225 BFD_ASSERT (s != NULL);
8226 BFD_ASSERT (s->contents != NULL);
8227 BFD_ASSERT (s->output_section != NULL);
8229 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
8230 sym_sec, val, s, error_message);
8234 my_offset = myh->root.u.def.value;
8235 tmp = bfd_get_32 (input_bfd, hit_data);
8236 tmp = tmp & 0xFF000000;
8238 /* Somehow these are both 4 too far, so subtract 8. */
8239 ret_offset = (s->output_offset
8241 + s->output_section->vma
8242 - (input_section->output_offset
8243 + input_section->output_section->vma
8247 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
8249 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
8254 /* Populate Arm stub for an exported Thumb function. */
8257 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
8259 struct bfd_link_info * info = (struct bfd_link_info *) inf;
8261 struct elf_link_hash_entry * myh;
8262 struct elf32_arm_link_hash_entry *eh;
8263 struct elf32_arm_link_hash_table * globals;
8266 char *error_message;
8268 eh = elf32_arm_hash_entry (h);
8269 /* Allocate stubs for exported Thumb functions on v4t. */
8270 if (eh->export_glue == NULL)
8273 globals = elf32_arm_hash_table (info);
8274 BFD_ASSERT (globals != NULL);
8275 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8277 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8278 ARM2THUMB_GLUE_SECTION_NAME);
8279 BFD_ASSERT (s != NULL);
8280 BFD_ASSERT (s->contents != NULL);
8281 BFD_ASSERT (s->output_section != NULL);
8283 sec = eh->export_glue->root.u.def.section;
8285 BFD_ASSERT (sec->output_section != NULL);
8287 val = eh->export_glue->root.u.def.value + sec->output_offset
8288 + sec->output_section->vma;
8290 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
8291 h->root.u.def.section->owner,
8292 globals->obfd, sec, val, s,
8298 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
8301 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
8306 struct elf32_arm_link_hash_table *globals;
8308 globals = elf32_arm_hash_table (info);
8309 BFD_ASSERT (globals != NULL);
8310 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8312 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8313 ARM_BX_GLUE_SECTION_NAME);
8314 BFD_ASSERT (s != NULL);
8315 BFD_ASSERT (s->contents != NULL);
8316 BFD_ASSERT (s->output_section != NULL);
8318 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
8320 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
8322 if ((globals->bx_glue_offset[reg] & 1) == 0)
8324 p = s->contents + glue_addr;
8325 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
8326 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
8327 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
8328 globals->bx_glue_offset[reg] |= 1;
8331 return glue_addr + s->output_section->vma + s->output_offset;
8334 /* Generate Arm stubs for exported Thumb symbols. */
8336 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
8337 struct bfd_link_info *link_info)
8339 struct elf32_arm_link_hash_table * globals;
8341 if (link_info == NULL)
8342 /* Ignore this if we are not called by the ELF backend linker. */
8345 globals = elf32_arm_hash_table (link_info);
8346 if (globals == NULL)
8349 /* If blx is available then exported Thumb symbols are OK and there is
8351 if (globals->use_blx)
8354 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
8358 /* Reserve space for COUNT dynamic relocations in relocation selection
8362 elf32_arm_allocate_dynrelocs (struct bfd_link_info *info, asection *sreloc,
8363 bfd_size_type count)
8365 struct elf32_arm_link_hash_table *htab;
8367 htab = elf32_arm_hash_table (info);
8368 BFD_ASSERT (htab->root.dynamic_sections_created);
8371 sreloc->size += RELOC_SIZE (htab) * count;
8374 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
8375 dynamic, the relocations should go in SRELOC, otherwise they should
8376 go in the special .rel.iplt section. */
8379 elf32_arm_allocate_irelocs (struct bfd_link_info *info, asection *sreloc,
8380 bfd_size_type count)
8382 struct elf32_arm_link_hash_table *htab;
8384 htab = elf32_arm_hash_table (info);
8385 if (!htab->root.dynamic_sections_created)
8386 htab->root.irelplt->size += RELOC_SIZE (htab) * count;
8389 BFD_ASSERT (sreloc != NULL);
8390 sreloc->size += RELOC_SIZE (htab) * count;
8394 /* Add relocation REL to the end of relocation section SRELOC. */
8397 elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info,
8398 asection *sreloc, Elf_Internal_Rela *rel)
8401 struct elf32_arm_link_hash_table *htab;
8403 htab = elf32_arm_hash_table (info);
8404 if (!htab->root.dynamic_sections_created
8405 && ELF32_R_TYPE (rel->r_info) == R_ARM_IRELATIVE)
8406 sreloc = htab->root.irelplt;
8409 loc = sreloc->contents;
8410 loc += sreloc->reloc_count++ * RELOC_SIZE (htab);
8411 if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
8413 SWAP_RELOC_OUT (htab) (output_bfd, rel, loc);
8416 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
8417 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
8421 elf32_arm_allocate_plt_entry (struct bfd_link_info *info,
8422 bfd_boolean is_iplt_entry,
8423 union gotplt_union *root_plt,
8424 struct arm_plt_info *arm_plt)
8426 struct elf32_arm_link_hash_table *htab;
8430 htab = elf32_arm_hash_table (info);
8434 splt = htab->root.iplt;
8435 sgotplt = htab->root.igotplt;
8437 /* NaCl uses a special first entry in .iplt too. */
8438 if (htab->nacl_p && splt->size == 0)
8439 splt->size += htab->plt_header_size;
8441 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
8442 elf32_arm_allocate_irelocs (info, htab->root.irelplt, 1);
8446 splt = htab->root.splt;
8447 sgotplt = htab->root.sgotplt;
8449 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
8450 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
8452 /* If this is the first .plt entry, make room for the special
8454 if (splt->size == 0)
8455 splt->size += htab->plt_header_size;
8457 htab->next_tls_desc_index++;
8460 /* Allocate the PLT entry itself, including any leading Thumb stub. */
8461 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
8462 splt->size += PLT_THUMB_STUB_SIZE;
8463 root_plt->offset = splt->size;
8464 splt->size += htab->plt_entry_size;
8466 if (!htab->symbian_p)
8468 /* We also need to make an entry in the .got.plt section, which
8469 will be placed in the .got section by the linker script. */
8471 arm_plt->got_offset = sgotplt->size;
8473 arm_plt->got_offset = sgotplt->size - 8 * htab->num_tls_desc;
8479 arm_movw_immediate (bfd_vma value)
8481 return (value & 0x00000fff) | ((value & 0x0000f000) << 4);
8485 arm_movt_immediate (bfd_vma value)
8487 return ((value & 0x0fff0000) >> 16) | ((value & 0xf0000000) >> 12);
8490 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
8491 the entry lives in .iplt and resolves to (*SYM_VALUE)().
8492 Otherwise, DYNINDX is the index of the symbol in the dynamic
8493 symbol table and SYM_VALUE is undefined.
8495 ROOT_PLT points to the offset of the PLT entry from the start of its
8496 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
8497 bookkeeping information.
8499 Returns FALSE if there was a problem. */
8502 elf32_arm_populate_plt_entry (bfd *output_bfd, struct bfd_link_info *info,
8503 union gotplt_union *root_plt,
8504 struct arm_plt_info *arm_plt,
8505 int dynindx, bfd_vma sym_value)
8507 struct elf32_arm_link_hash_table *htab;
8513 Elf_Internal_Rela rel;
8514 bfd_vma plt_header_size;
8515 bfd_vma got_header_size;
8517 htab = elf32_arm_hash_table (info);
8519 /* Pick the appropriate sections and sizes. */
8522 splt = htab->root.iplt;
8523 sgot = htab->root.igotplt;
8524 srel = htab->root.irelplt;
8526 /* There are no reserved entries in .igot.plt, and no special
8527 first entry in .iplt. */
8528 got_header_size = 0;
8529 plt_header_size = 0;
8533 splt = htab->root.splt;
8534 sgot = htab->root.sgotplt;
8535 srel = htab->root.srelplt;
8537 got_header_size = get_elf_backend_data (output_bfd)->got_header_size;
8538 plt_header_size = htab->plt_header_size;
8540 BFD_ASSERT (splt != NULL && srel != NULL);
8542 /* Fill in the entry in the procedure linkage table. */
8543 if (htab->symbian_p)
8545 BFD_ASSERT (dynindx >= 0);
8546 put_arm_insn (htab, output_bfd,
8547 elf32_arm_symbian_plt_entry[0],
8548 splt->contents + root_plt->offset);
8549 bfd_put_32 (output_bfd,
8550 elf32_arm_symbian_plt_entry[1],
8551 splt->contents + root_plt->offset + 4);
8553 /* Fill in the entry in the .rel.plt section. */
8554 rel.r_offset = (splt->output_section->vma
8555 + splt->output_offset
8556 + root_plt->offset + 4);
8557 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_GLOB_DAT);
8559 /* Get the index in the procedure linkage table which
8560 corresponds to this symbol. This is the index of this symbol
8561 in all the symbols for which we are making plt entries. The
8562 first entry in the procedure linkage table is reserved. */
8563 plt_index = ((root_plt->offset - plt_header_size)
8564 / htab->plt_entry_size);
8568 bfd_vma got_offset, got_address, plt_address;
8569 bfd_vma got_displacement, initial_got_entry;
8572 BFD_ASSERT (sgot != NULL);
8574 /* Get the offset into the .(i)got.plt table of the entry that
8575 corresponds to this function. */
8576 got_offset = (arm_plt->got_offset & -2);
8578 /* Get the index in the procedure linkage table which
8579 corresponds to this symbol. This is the index of this symbol
8580 in all the symbols for which we are making plt entries.
8581 After the reserved .got.plt entries, all symbols appear in
8582 the same order as in .plt. */
8583 plt_index = (got_offset - got_header_size) / 4;
8585 /* Calculate the address of the GOT entry. */
8586 got_address = (sgot->output_section->vma
8587 + sgot->output_offset
8590 /* ...and the address of the PLT entry. */
8591 plt_address = (splt->output_section->vma
8592 + splt->output_offset
8593 + root_plt->offset);
8595 ptr = splt->contents + root_plt->offset;
8596 if (htab->vxworks_p && bfd_link_pic (info))
8601 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8603 val = elf32_arm_vxworks_shared_plt_entry[i];
8605 val |= got_address - sgot->output_section->vma;
8607 val |= plt_index * RELOC_SIZE (htab);
8608 if (i == 2 || i == 5)
8609 bfd_put_32 (output_bfd, val, ptr);
8611 put_arm_insn (htab, output_bfd, val, ptr);
8614 else if (htab->vxworks_p)
8619 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8621 val = elf32_arm_vxworks_exec_plt_entry[i];
8625 val |= 0xffffff & -((root_plt->offset + i * 4 + 8) >> 2);
8627 val |= plt_index * RELOC_SIZE (htab);
8628 if (i == 2 || i == 5)
8629 bfd_put_32 (output_bfd, val, ptr);
8631 put_arm_insn (htab, output_bfd, val, ptr);
8634 loc = (htab->srelplt2->contents
8635 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
8637 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
8638 referencing the GOT for this PLT entry. */
8639 rel.r_offset = plt_address + 8;
8640 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8641 rel.r_addend = got_offset;
8642 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8643 loc += RELOC_SIZE (htab);
8645 /* Create the R_ARM_ABS32 relocation referencing the
8646 beginning of the PLT for this GOT entry. */
8647 rel.r_offset = got_address;
8648 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
8650 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8652 else if (htab->nacl_p)
8654 /* Calculate the displacement between the PLT slot and the
8655 common tail that's part of the special initial PLT slot. */
8656 int32_t tail_displacement
8657 = ((splt->output_section->vma + splt->output_offset
8658 + ARM_NACL_PLT_TAIL_OFFSET)
8659 - (plt_address + htab->plt_entry_size + 4));
8660 BFD_ASSERT ((tail_displacement & 3) == 0);
8661 tail_displacement >>= 2;
8663 BFD_ASSERT ((tail_displacement & 0xff000000) == 0
8664 || (-tail_displacement & 0xff000000) == 0);
8666 /* Calculate the displacement between the PLT slot and the entry
8667 in the GOT. The offset accounts for the value produced by
8668 adding to pc in the penultimate instruction of the PLT stub. */
8669 got_displacement = (got_address
8670 - (plt_address + htab->plt_entry_size));
8672 /* NaCl does not support interworking at all. */
8673 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info, arm_plt));
8675 put_arm_insn (htab, output_bfd,
8676 elf32_arm_nacl_plt_entry[0]
8677 | arm_movw_immediate (got_displacement),
8679 put_arm_insn (htab, output_bfd,
8680 elf32_arm_nacl_plt_entry[1]
8681 | arm_movt_immediate (got_displacement),
8683 put_arm_insn (htab, output_bfd,
8684 elf32_arm_nacl_plt_entry[2],
8686 put_arm_insn (htab, output_bfd,
8687 elf32_arm_nacl_plt_entry[3]
8688 | (tail_displacement & 0x00ffffff),
8691 else if (using_thumb_only (htab))
8693 /* PR ld/16017: Generate thumb only PLT entries. */
8694 if (!using_thumb2 (htab))
8696 /* FIXME: We ought to be able to generate thumb-1 PLT
8698 _bfd_error_handler (_("%B: Warning: thumb-1 mode PLT generation not currently supported"),
8703 /* Calculate the displacement between the PLT slot and the entry in
8704 the GOT. The 12-byte offset accounts for the value produced by
8705 adding to pc in the 3rd instruction of the PLT stub. */
8706 got_displacement = got_address - (plt_address + 12);
8708 /* As we are using 32 bit instructions we have to use 'put_arm_insn'
8709 instead of 'put_thumb_insn'. */
8710 put_arm_insn (htab, output_bfd,
8711 elf32_thumb2_plt_entry[0]
8712 | ((got_displacement & 0x000000ff) << 16)
8713 | ((got_displacement & 0x00000700) << 20)
8714 | ((got_displacement & 0x00000800) >> 1)
8715 | ((got_displacement & 0x0000f000) >> 12),
8717 put_arm_insn (htab, output_bfd,
8718 elf32_thumb2_plt_entry[1]
8719 | ((got_displacement & 0x00ff0000) )
8720 | ((got_displacement & 0x07000000) << 4)
8721 | ((got_displacement & 0x08000000) >> 17)
8722 | ((got_displacement & 0xf0000000) >> 28),
8724 put_arm_insn (htab, output_bfd,
8725 elf32_thumb2_plt_entry[2],
8727 put_arm_insn (htab, output_bfd,
8728 elf32_thumb2_plt_entry[3],
8733 /* Calculate the displacement between the PLT slot and the
8734 entry in the GOT. The eight-byte offset accounts for the
8735 value produced by adding to pc in the first instruction
8737 got_displacement = got_address - (plt_address + 8);
8739 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
8741 put_thumb_insn (htab, output_bfd,
8742 elf32_arm_plt_thumb_stub[0], ptr - 4);
8743 put_thumb_insn (htab, output_bfd,
8744 elf32_arm_plt_thumb_stub[1], ptr - 2);
8747 if (!elf32_arm_use_long_plt_entry)
8749 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
8751 put_arm_insn (htab, output_bfd,
8752 elf32_arm_plt_entry_short[0]
8753 | ((got_displacement & 0x0ff00000) >> 20),
8755 put_arm_insn (htab, output_bfd,
8756 elf32_arm_plt_entry_short[1]
8757 | ((got_displacement & 0x000ff000) >> 12),
8759 put_arm_insn (htab, output_bfd,
8760 elf32_arm_plt_entry_short[2]
8761 | (got_displacement & 0x00000fff),
8763 #ifdef FOUR_WORD_PLT
8764 bfd_put_32 (output_bfd, elf32_arm_plt_entry_short[3], ptr + 12);
8769 put_arm_insn (htab, output_bfd,
8770 elf32_arm_plt_entry_long[0]
8771 | ((got_displacement & 0xf0000000) >> 28),
8773 put_arm_insn (htab, output_bfd,
8774 elf32_arm_plt_entry_long[1]
8775 | ((got_displacement & 0x0ff00000) >> 20),
8777 put_arm_insn (htab, output_bfd,
8778 elf32_arm_plt_entry_long[2]
8779 | ((got_displacement & 0x000ff000) >> 12),
8781 put_arm_insn (htab, output_bfd,
8782 elf32_arm_plt_entry_long[3]
8783 | (got_displacement & 0x00000fff),
8788 /* Fill in the entry in the .rel(a).(i)plt section. */
8789 rel.r_offset = got_address;
8793 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
8794 The dynamic linker or static executable then calls SYM_VALUE
8795 to determine the correct run-time value of the .igot.plt entry. */
8796 rel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
8797 initial_got_entry = sym_value;
8801 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_JUMP_SLOT);
8802 initial_got_entry = (splt->output_section->vma
8803 + splt->output_offset);
8806 /* Fill in the entry in the global offset table. */
8807 bfd_put_32 (output_bfd, initial_got_entry,
8808 sgot->contents + got_offset);
8812 elf32_arm_add_dynreloc (output_bfd, info, srel, &rel);
8815 loc = srel->contents + plt_index * RELOC_SIZE (htab);
8816 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8822 /* Some relocations map to different relocations depending on the
8823 target. Return the real relocation. */
8826 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
8832 if (globals->target1_is_rel)
8838 return globals->target2_reloc;
8845 /* Return the base VMA address which should be subtracted from real addresses
8846 when resolving @dtpoff relocation.
8847 This is PT_TLS segment p_vaddr. */
8850 dtpoff_base (struct bfd_link_info *info)
8852 /* If tls_sec is NULL, we should have signalled an error already. */
8853 if (elf_hash_table (info)->tls_sec == NULL)
8855 return elf_hash_table (info)->tls_sec->vma;
8858 /* Return the relocation value for @tpoff relocation
8859 if STT_TLS virtual address is ADDRESS. */
8862 tpoff (struct bfd_link_info *info, bfd_vma address)
8864 struct elf_link_hash_table *htab = elf_hash_table (info);
8867 /* If tls_sec is NULL, we should have signalled an error already. */
8868 if (htab->tls_sec == NULL)
8870 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
8871 return address - htab->tls_sec->vma + base;
8874 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
8875 VALUE is the relocation value. */
8877 static bfd_reloc_status_type
8878 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
8881 return bfd_reloc_overflow;
8883 value |= bfd_get_32 (abfd, data) & 0xfffff000;
8884 bfd_put_32 (abfd, value, data);
8885 return bfd_reloc_ok;
8888 /* Handle TLS relaxations. Relaxing is possible for symbols that use
8889 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
8890 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
8892 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
8893 is to then call final_link_relocate. Return other values in the
8896 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
8897 the pre-relaxed code. It would be nice if the relocs were updated
8898 to match the optimization. */
8900 static bfd_reloc_status_type
8901 elf32_arm_tls_relax (struct elf32_arm_link_hash_table *globals,
8902 bfd *input_bfd, asection *input_sec, bfd_byte *contents,
8903 Elf_Internal_Rela *rel, unsigned long is_local)
8907 switch (ELF32_R_TYPE (rel->r_info))
8910 return bfd_reloc_notsupported;
8912 case R_ARM_TLS_GOTDESC:
8917 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8919 insn -= 5; /* THUMB */
8921 insn -= 8; /* ARM */
8923 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8924 return bfd_reloc_continue;
8926 case R_ARM_THM_TLS_DESCSEQ:
8928 insn = bfd_get_16 (input_bfd, contents + rel->r_offset);
8929 if ((insn & 0xff78) == 0x4478) /* add rx, pc */
8933 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
8935 else if ((insn & 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
8939 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
8942 bfd_put_16 (input_bfd, insn & 0xf83f, contents + rel->r_offset);
8944 else if ((insn & 0xff87) == 0x4780) /* blx rx */
8948 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
8951 bfd_put_16 (input_bfd, 0x4600 | (insn & 0x78),
8952 contents + rel->r_offset);
8956 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
8957 /* It's a 32 bit instruction, fetch the rest of it for
8958 error generation. */
8960 | bfd_get_16 (input_bfd, contents + rel->r_offset + 2);
8961 (*_bfd_error_handler)
8962 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
8963 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
8964 return bfd_reloc_notsupported;
8968 case R_ARM_TLS_DESCSEQ:
8970 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8971 if ((insn & 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
8975 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xffff),
8976 contents + rel->r_offset);
8978 else if ((insn & 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
8982 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
8985 bfd_put_32 (input_bfd, insn & 0xfffff000,
8986 contents + rel->r_offset);
8988 else if ((insn & 0xfffffff0) == 0xe12fff30) /* blx rx */
8992 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
8995 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xf),
8996 contents + rel->r_offset);
9000 (*_bfd_error_handler)
9001 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
9002 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
9003 return bfd_reloc_notsupported;
9007 case R_ARM_TLS_CALL:
9008 /* GD->IE relaxation, turn the instruction into 'nop' or
9009 'ldr r0, [pc,r0]' */
9010 insn = is_local ? 0xe1a00000 : 0xe79f0000;
9011 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9014 case R_ARM_THM_TLS_CALL:
9015 /* GD->IE relaxation. */
9017 /* add r0,pc; ldr r0, [r0] */
9019 else if (using_thumb2 (globals))
9026 bfd_put_16 (input_bfd, insn >> 16, contents + rel->r_offset);
9027 bfd_put_16 (input_bfd, insn & 0xffff, contents + rel->r_offset + 2);
9030 return bfd_reloc_ok;
9033 /* For a given value of n, calculate the value of G_n as required to
9034 deal with group relocations. We return it in the form of an
9035 encoded constant-and-rotation, together with the final residual. If n is
9036 specified as less than zero, then final_residual is filled with the
9037 input value and no further action is performed. */
9040 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
9044 bfd_vma encoded_g_n = 0;
9045 bfd_vma residual = value; /* Also known as Y_n. */
9047 for (current_n = 0; current_n <= n; current_n++)
9051 /* Calculate which part of the value to mask. */
9058 /* Determine the most significant bit in the residual and
9059 align the resulting value to a 2-bit boundary. */
9060 for (msb = 30; msb >= 0; msb -= 2)
9061 if (residual & (3 << msb))
9064 /* The desired shift is now (msb - 6), or zero, whichever
9071 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
9072 g_n = residual & (0xff << shift);
9073 encoded_g_n = (g_n >> shift)
9074 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
9076 /* Calculate the residual for the next time around. */
9080 *final_residual = residual;
9085 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
9086 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
9089 identify_add_or_sub (bfd_vma insn)
9091 int opcode = insn & 0x1e00000;
9093 if (opcode == 1 << 23) /* ADD */
9096 if (opcode == 1 << 22) /* SUB */
9102 /* Perform a relocation as part of a final link. */
9104 static bfd_reloc_status_type
9105 elf32_arm_final_link_relocate (reloc_howto_type * howto,
9108 asection * input_section,
9109 bfd_byte * contents,
9110 Elf_Internal_Rela * rel,
9112 struct bfd_link_info * info,
9114 const char * sym_name,
9115 unsigned char st_type,
9116 enum arm_st_branch_type branch_type,
9117 struct elf_link_hash_entry * h,
9118 bfd_boolean * unresolved_reloc_p,
9119 char ** error_message)
9121 unsigned long r_type = howto->type;
9122 unsigned long r_symndx;
9123 bfd_byte * hit_data = contents + rel->r_offset;
9124 bfd_vma * local_got_offsets;
9125 bfd_vma * local_tlsdesc_gotents;
9128 asection * sreloc = NULL;
9131 bfd_signed_vma signed_addend;
9132 unsigned char dynreloc_st_type;
9133 bfd_vma dynreloc_value;
9134 struct elf32_arm_link_hash_table * globals;
9135 struct elf32_arm_link_hash_entry *eh;
9136 union gotplt_union *root_plt;
9137 struct arm_plt_info *arm_plt;
9139 bfd_vma gotplt_offset;
9140 bfd_boolean has_iplt_entry;
9142 globals = elf32_arm_hash_table (info);
9143 if (globals == NULL)
9144 return bfd_reloc_notsupported;
9146 BFD_ASSERT (is_arm_elf (input_bfd));
9148 /* Some relocation types map to different relocations depending on the
9149 target. We pick the right one here. */
9150 r_type = arm_real_reloc_type (globals, r_type);
9152 /* It is possible to have linker relaxations on some TLS access
9153 models. Update our information here. */
9154 r_type = elf32_arm_tls_transition (info, r_type, h);
9156 if (r_type != howto->type)
9157 howto = elf32_arm_howto_from_type (r_type);
9159 eh = (struct elf32_arm_link_hash_entry *) h;
9160 sgot = globals->root.sgot;
9161 local_got_offsets = elf_local_got_offsets (input_bfd);
9162 local_tlsdesc_gotents = elf32_arm_local_tlsdesc_gotent (input_bfd);
9164 if (globals->root.dynamic_sections_created)
9165 srelgot = globals->root.srelgot;
9169 r_symndx = ELF32_R_SYM (rel->r_info);
9171 if (globals->use_rel)
9173 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
9175 if (addend & ((howto->src_mask + 1) >> 1))
9178 signed_addend &= ~ howto->src_mask;
9179 signed_addend |= addend;
9182 signed_addend = addend;
9185 addend = signed_addend = rel->r_addend;
9187 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
9188 are resolving a function call relocation. */
9189 if (using_thumb_only (globals)
9190 && (r_type == R_ARM_THM_CALL
9191 || r_type == R_ARM_THM_JUMP24)
9192 && branch_type == ST_BRANCH_TO_ARM)
9193 branch_type = ST_BRANCH_TO_THUMB;
9195 /* Record the symbol information that should be used in dynamic
9197 dynreloc_st_type = st_type;
9198 dynreloc_value = value;
9199 if (branch_type == ST_BRANCH_TO_THUMB)
9200 dynreloc_value |= 1;
9202 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
9203 VALUE appropriately for relocations that we resolve at link time. */
9204 has_iplt_entry = FALSE;
9205 if (elf32_arm_get_plt_info (input_bfd, eh, r_symndx, &root_plt, &arm_plt)
9206 && root_plt->offset != (bfd_vma) -1)
9208 plt_offset = root_plt->offset;
9209 gotplt_offset = arm_plt->got_offset;
9211 if (h == NULL || eh->is_iplt)
9213 has_iplt_entry = TRUE;
9214 splt = globals->root.iplt;
9216 /* Populate .iplt entries here, because not all of them will
9217 be seen by finish_dynamic_symbol. The lower bit is set if
9218 we have already populated the entry. */
9223 if (elf32_arm_populate_plt_entry (output_bfd, info, root_plt, arm_plt,
9224 -1, dynreloc_value))
9225 root_plt->offset |= 1;
9227 return bfd_reloc_notsupported;
9230 /* Static relocations always resolve to the .iplt entry. */
9232 value = (splt->output_section->vma
9233 + splt->output_offset
9235 branch_type = ST_BRANCH_TO_ARM;
9237 /* If there are non-call relocations that resolve to the .iplt
9238 entry, then all dynamic ones must too. */
9239 if (arm_plt->noncall_refcount != 0)
9241 dynreloc_st_type = st_type;
9242 dynreloc_value = value;
9246 /* We populate the .plt entry in finish_dynamic_symbol. */
9247 splt = globals->root.splt;
9252 plt_offset = (bfd_vma) -1;
9253 gotplt_offset = (bfd_vma) -1;
9259 /* We don't need to find a value for this symbol. It's just a
9261 *unresolved_reloc_p = FALSE;
9262 return bfd_reloc_ok;
9265 if (!globals->vxworks_p)
9266 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
9270 case R_ARM_ABS32_NOI:
9272 case R_ARM_REL32_NOI:
9278 /* Handle relocations which should use the PLT entry. ABS32/REL32
9279 will use the symbol's value, which may point to a PLT entry, but we
9280 don't need to handle that here. If we created a PLT entry, all
9281 branches in this object should go to it, except if the PLT is too
9282 far away, in which case a long branch stub should be inserted. */
9283 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
9284 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI
9285 && r_type != R_ARM_CALL
9286 && r_type != R_ARM_JUMP24
9287 && r_type != R_ARM_PLT32)
9288 && plt_offset != (bfd_vma) -1)
9290 /* If we've created a .plt section, and assigned a PLT entry
9291 to this function, it must either be a STT_GNU_IFUNC reference
9292 or not be known to bind locally. In other cases, we should
9293 have cleared the PLT entry by now. */
9294 BFD_ASSERT (has_iplt_entry || !SYMBOL_CALLS_LOCAL (info, h));
9296 value = (splt->output_section->vma
9297 + splt->output_offset
9299 *unresolved_reloc_p = FALSE;
9300 return _bfd_final_link_relocate (howto, input_bfd, input_section,
9301 contents, rel->r_offset, value,
9305 /* When generating a shared object or relocatable executable, these
9306 relocations are copied into the output file to be resolved at
9308 if ((bfd_link_pic (info)
9309 || globals->root.is_relocatable_executable)
9310 && (input_section->flags & SEC_ALLOC)
9311 && !(globals->vxworks_p
9312 && strcmp (input_section->output_section->name,
9314 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
9315 || !SYMBOL_CALLS_LOCAL (info, h))
9316 && !(input_bfd == globals->stub_bfd
9317 && strstr (input_section->name, STUB_SUFFIX))
9319 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9320 || h->root.type != bfd_link_hash_undefweak)
9321 && r_type != R_ARM_PC24
9322 && r_type != R_ARM_CALL
9323 && r_type != R_ARM_JUMP24
9324 && r_type != R_ARM_PREL31
9325 && r_type != R_ARM_PLT32)
9327 Elf_Internal_Rela outrel;
9328 bfd_boolean skip, relocate;
9330 if ((r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
9333 char *v = _("shared object");
9335 if (bfd_link_executable (info))
9336 v = _("PIE executable");
9338 (*_bfd_error_handler)
9339 (_("%B: relocation %s against external or undefined symbol `%s'"
9340 " can not be used when making a %s; recompile with -fPIC"), input_bfd,
9341 elf32_arm_howto_table_1[r_type].name, h->root.root.string, v);
9342 return bfd_reloc_notsupported;
9345 *unresolved_reloc_p = FALSE;
9347 if (sreloc == NULL && globals->root.dynamic_sections_created)
9349 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
9350 ! globals->use_rel);
9353 return bfd_reloc_notsupported;
9359 outrel.r_addend = addend;
9361 _bfd_elf_section_offset (output_bfd, info, input_section,
9363 if (outrel.r_offset == (bfd_vma) -1)
9365 else if (outrel.r_offset == (bfd_vma) -2)
9366 skip = TRUE, relocate = TRUE;
9367 outrel.r_offset += (input_section->output_section->vma
9368 + input_section->output_offset);
9371 memset (&outrel, 0, sizeof outrel);
9374 && (!bfd_link_pic (info)
9375 || !SYMBOLIC_BIND (info, h)
9376 || !h->def_regular))
9377 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
9382 /* This symbol is local, or marked to become local. */
9383 BFD_ASSERT (r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI);
9384 if (globals->symbian_p)
9388 /* On Symbian OS, the data segment and text segement
9389 can be relocated independently. Therefore, we
9390 must indicate the segment to which this
9391 relocation is relative. The BPABI allows us to
9392 use any symbol in the right segment; we just use
9393 the section symbol as it is convenient. (We
9394 cannot use the symbol given by "h" directly as it
9395 will not appear in the dynamic symbol table.)
9397 Note that the dynamic linker ignores the section
9398 symbol value, so we don't subtract osec->vma
9399 from the emitted reloc addend. */
9401 osec = sym_sec->output_section;
9403 osec = input_section->output_section;
9404 symbol = elf_section_data (osec)->dynindx;
9407 struct elf_link_hash_table *htab = elf_hash_table (info);
9409 if ((osec->flags & SEC_READONLY) == 0
9410 && htab->data_index_section != NULL)
9411 osec = htab->data_index_section;
9413 osec = htab->text_index_section;
9414 symbol = elf_section_data (osec)->dynindx;
9416 BFD_ASSERT (symbol != 0);
9419 /* On SVR4-ish systems, the dynamic loader cannot
9420 relocate the text and data segments independently,
9421 so the symbol does not matter. */
9423 if (dynreloc_st_type == STT_GNU_IFUNC)
9424 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
9425 to the .iplt entry. Instead, every non-call reference
9426 must use an R_ARM_IRELATIVE relocation to obtain the
9427 correct run-time address. */
9428 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_IRELATIVE);
9430 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
9431 if (globals->use_rel)
9434 outrel.r_addend += dynreloc_value;
9437 elf32_arm_add_dynreloc (output_bfd, info, sreloc, &outrel);
9439 /* If this reloc is against an external symbol, we do not want to
9440 fiddle with the addend. Otherwise, we need to include the symbol
9441 value so that it becomes an addend for the dynamic reloc. */
9443 return bfd_reloc_ok;
9445 return _bfd_final_link_relocate (howto, input_bfd, input_section,
9446 contents, rel->r_offset,
9447 dynreloc_value, (bfd_vma) 0);
9449 else switch (r_type)
9452 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
9454 case R_ARM_XPC25: /* Arm BLX instruction. */
9457 case R_ARM_PC24: /* Arm B/BL instruction. */
9460 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
9462 if (r_type == R_ARM_XPC25)
9464 /* Check for Arm calling Arm function. */
9465 /* FIXME: Should we translate the instruction into a BL
9466 instruction instead ? */
9467 if (branch_type != ST_BRANCH_TO_THUMB)
9468 (*_bfd_error_handler)
9469 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
9471 h ? h->root.root.string : "(local)");
9473 else if (r_type == R_ARM_PC24)
9475 /* Check for Arm calling Thumb function. */
9476 if (branch_type == ST_BRANCH_TO_THUMB)
9478 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
9479 output_bfd, input_section,
9480 hit_data, sym_sec, rel->r_offset,
9481 signed_addend, value,
9483 return bfd_reloc_ok;
9485 return bfd_reloc_dangerous;
9489 /* Check if a stub has to be inserted because the
9490 destination is too far or we are changing mode. */
9491 if ( r_type == R_ARM_CALL
9492 || r_type == R_ARM_JUMP24
9493 || r_type == R_ARM_PLT32)
9495 enum elf32_arm_stub_type stub_type = arm_stub_none;
9496 struct elf32_arm_link_hash_entry *hash;
9498 hash = (struct elf32_arm_link_hash_entry *) h;
9499 stub_type = arm_type_of_stub (info, input_section, rel,
9500 st_type, &branch_type,
9501 hash, value, sym_sec,
9502 input_bfd, sym_name);
9504 if (stub_type != arm_stub_none)
9506 /* The target is out of reach, so redirect the
9507 branch to the local stub for this function. */
9508 stub_entry = elf32_arm_get_stub_entry (input_section,
9513 if (stub_entry != NULL)
9514 value = (stub_entry->stub_offset
9515 + stub_entry->stub_sec->output_offset
9516 + stub_entry->stub_sec->output_section->vma);
9518 if (plt_offset != (bfd_vma) -1)
9519 *unresolved_reloc_p = FALSE;
9524 /* If the call goes through a PLT entry, make sure to
9525 check distance to the right destination address. */
9526 if (plt_offset != (bfd_vma) -1)
9528 value = (splt->output_section->vma
9529 + splt->output_offset
9531 *unresolved_reloc_p = FALSE;
9532 /* The PLT entry is in ARM mode, regardless of the
9534 branch_type = ST_BRANCH_TO_ARM;
9539 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
9541 S is the address of the symbol in the relocation.
9542 P is address of the instruction being relocated.
9543 A is the addend (extracted from the instruction) in bytes.
9545 S is held in 'value'.
9546 P is the base address of the section containing the
9547 instruction plus the offset of the reloc into that
9549 (input_section->output_section->vma +
9550 input_section->output_offset +
9552 A is the addend, converted into bytes, ie:
9555 Note: None of these operations have knowledge of the pipeline
9556 size of the processor, thus it is up to the assembler to
9557 encode this information into the addend. */
9558 value -= (input_section->output_section->vma
9559 + input_section->output_offset);
9560 value -= rel->r_offset;
9561 if (globals->use_rel)
9562 value += (signed_addend << howto->size);
9564 /* RELA addends do not have to be adjusted by howto->size. */
9565 value += signed_addend;
9567 signed_addend = value;
9568 signed_addend >>= howto->rightshift;
9570 /* A branch to an undefined weak symbol is turned into a jump to
9571 the next instruction unless a PLT entry will be created.
9572 Do the same for local undefined symbols (but not for STN_UNDEF).
9573 The jump to the next instruction is optimized as a NOP depending
9574 on the architecture. */
9575 if (h ? (h->root.type == bfd_link_hash_undefweak
9576 && plt_offset == (bfd_vma) -1)
9577 : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec))
9579 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000);
9581 if (arch_has_arm_nop (globals))
9582 value |= 0x0320f000;
9584 value |= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
9588 /* Perform a signed range check. */
9589 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
9590 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
9591 return bfd_reloc_overflow;
9593 addend = (value & 2);
9595 value = (signed_addend & howto->dst_mask)
9596 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
9598 if (r_type == R_ARM_CALL)
9600 /* Set the H bit in the BLX instruction. */
9601 if (branch_type == ST_BRANCH_TO_THUMB)
9606 value &= ~(bfd_vma)(1 << 24);
9609 /* Select the correct instruction (BL or BLX). */
9610 /* Only if we are not handling a BL to a stub. In this
9611 case, mode switching is performed by the stub. */
9612 if (branch_type == ST_BRANCH_TO_THUMB && !stub_entry)
9614 else if (stub_entry || branch_type != ST_BRANCH_UNKNOWN)
9616 value &= ~(bfd_vma)(1 << 28);
9626 if (branch_type == ST_BRANCH_TO_THUMB)
9630 case R_ARM_ABS32_NOI:
9636 if (branch_type == ST_BRANCH_TO_THUMB)
9638 value -= (input_section->output_section->vma
9639 + input_section->output_offset + rel->r_offset);
9642 case R_ARM_REL32_NOI:
9644 value -= (input_section->output_section->vma
9645 + input_section->output_offset + rel->r_offset);
9649 value -= (input_section->output_section->vma
9650 + input_section->output_offset + rel->r_offset);
9651 value += signed_addend;
9652 if (! h || h->root.type != bfd_link_hash_undefweak)
9654 /* Check for overflow. */
9655 if ((value ^ (value >> 1)) & (1 << 30))
9656 return bfd_reloc_overflow;
9658 value &= 0x7fffffff;
9659 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
9660 if (branch_type == ST_BRANCH_TO_THUMB)
9665 bfd_put_32 (input_bfd, value, hit_data);
9666 return bfd_reloc_ok;
9669 /* PR 16202: Refectch the addend using the correct size. */
9670 if (globals->use_rel)
9671 addend = bfd_get_8 (input_bfd, hit_data);
9674 /* There is no way to tell whether the user intended to use a signed or
9675 unsigned addend. When checking for overflow we accept either,
9676 as specified by the AAELF. */
9677 if ((long) value > 0xff || (long) value < -0x80)
9678 return bfd_reloc_overflow;
9680 bfd_put_8 (input_bfd, value, hit_data);
9681 return bfd_reloc_ok;
9684 /* PR 16202: Refectch the addend using the correct size. */
9685 if (globals->use_rel)
9686 addend = bfd_get_16 (input_bfd, hit_data);
9689 /* See comment for R_ARM_ABS8. */
9690 if ((long) value > 0xffff || (long) value < -0x8000)
9691 return bfd_reloc_overflow;
9693 bfd_put_16 (input_bfd, value, hit_data);
9694 return bfd_reloc_ok;
9696 case R_ARM_THM_ABS5:
9697 /* Support ldr and str instructions for the thumb. */
9698 if (globals->use_rel)
9700 /* Need to refetch addend. */
9701 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
9702 /* ??? Need to determine shift amount from operand size. */
9703 addend >>= howto->rightshift;
9707 /* ??? Isn't value unsigned? */
9708 if ((long) value > 0x1f || (long) value < -0x10)
9709 return bfd_reloc_overflow;
9711 /* ??? Value needs to be properly shifted into place first. */
9712 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
9713 bfd_put_16 (input_bfd, value, hit_data);
9714 return bfd_reloc_ok;
9716 case R_ARM_THM_ALU_PREL_11_0:
9717 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
9720 bfd_signed_vma relocation;
9722 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
9723 | bfd_get_16 (input_bfd, hit_data + 2);
9725 if (globals->use_rel)
9727 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
9728 | ((insn & (1 << 26)) >> 15);
9729 if (insn & 0xf00000)
9730 signed_addend = -signed_addend;
9733 relocation = value + signed_addend;
9734 relocation -= Pa (input_section->output_section->vma
9735 + input_section->output_offset
9740 if (value >= 0x1000)
9741 return bfd_reloc_overflow;
9743 insn = (insn & 0xfb0f8f00) | (value & 0xff)
9744 | ((value & 0x700) << 4)
9745 | ((value & 0x800) << 15);
9749 bfd_put_16 (input_bfd, insn >> 16, hit_data);
9750 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
9752 return bfd_reloc_ok;
9756 /* PR 10073: This reloc is not generated by the GNU toolchain,
9757 but it is supported for compatibility with third party libraries
9758 generated by other compilers, specifically the ARM/IAR. */
9761 bfd_signed_vma relocation;
9763 insn = bfd_get_16 (input_bfd, hit_data);
9765 if (globals->use_rel)
9766 addend = ((((insn & 0x00ff) << 2) + 4) & 0x3ff) -4;
9768 relocation = value + addend;
9769 relocation -= Pa (input_section->output_section->vma
9770 + input_section->output_offset
9775 /* We do not check for overflow of this reloc. Although strictly
9776 speaking this is incorrect, it appears to be necessary in order
9777 to work with IAR generated relocs. Since GCC and GAS do not
9778 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
9779 a problem for them. */
9782 insn = (insn & 0xff00) | (value >> 2);
9784 bfd_put_16 (input_bfd, insn, hit_data);
9786 return bfd_reloc_ok;
9789 case R_ARM_THM_PC12:
9790 /* Corresponds to: ldr.w reg, [pc, #offset]. */
9793 bfd_signed_vma relocation;
9795 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
9796 | bfd_get_16 (input_bfd, hit_data + 2);
9798 if (globals->use_rel)
9800 signed_addend = insn & 0xfff;
9801 if (!(insn & (1 << 23)))
9802 signed_addend = -signed_addend;
9805 relocation = value + signed_addend;
9806 relocation -= Pa (input_section->output_section->vma
9807 + input_section->output_offset
9812 if (value >= 0x1000)
9813 return bfd_reloc_overflow;
9815 insn = (insn & 0xff7ff000) | value;
9816 if (relocation >= 0)
9819 bfd_put_16 (input_bfd, insn >> 16, hit_data);
9820 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
9822 return bfd_reloc_ok;
9825 case R_ARM_THM_XPC22:
9826 case R_ARM_THM_CALL:
9827 case R_ARM_THM_JUMP24:
9828 /* Thumb BL (branch long instruction). */
9832 bfd_boolean overflow = FALSE;
9833 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
9834 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
9835 bfd_signed_vma reloc_signed_max;
9836 bfd_signed_vma reloc_signed_min;
9838 bfd_signed_vma signed_check;
9840 const int thumb2 = using_thumb2 (globals);
9842 /* A branch to an undefined weak symbol is turned into a jump to
9843 the next instruction unless a PLT entry will be created.
9844 The jump to the next instruction is optimized as a NOP.W for
9845 Thumb-2 enabled architectures. */
9846 if (h && h->root.type == bfd_link_hash_undefweak
9847 && plt_offset == (bfd_vma) -1)
9851 bfd_put_16 (input_bfd, 0xf3af, hit_data);
9852 bfd_put_16 (input_bfd, 0x8000, hit_data + 2);
9856 bfd_put_16 (input_bfd, 0xe000, hit_data);
9857 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
9859 return bfd_reloc_ok;
9862 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
9863 with Thumb-1) involving the J1 and J2 bits. */
9864 if (globals->use_rel)
9866 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
9867 bfd_vma upper = upper_insn & 0x3ff;
9868 bfd_vma lower = lower_insn & 0x7ff;
9869 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
9870 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
9871 bfd_vma i1 = j1 ^ s ? 0 : 1;
9872 bfd_vma i2 = j2 ^ s ? 0 : 1;
9874 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
9876 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
9878 signed_addend = addend;
9881 if (r_type == R_ARM_THM_XPC22)
9883 /* Check for Thumb to Thumb call. */
9884 /* FIXME: Should we translate the instruction into a BL
9885 instruction instead ? */
9886 if (branch_type == ST_BRANCH_TO_THUMB)
9887 (*_bfd_error_handler)
9888 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
9890 h ? h->root.root.string : "(local)");
9894 /* If it is not a call to Thumb, assume call to Arm.
9895 If it is a call relative to a section name, then it is not a
9896 function call at all, but rather a long jump. Calls through
9897 the PLT do not require stubs. */
9898 if (branch_type == ST_BRANCH_TO_ARM && plt_offset == (bfd_vma) -1)
9900 if (globals->use_blx && r_type == R_ARM_THM_CALL)
9902 /* Convert BL to BLX. */
9903 lower_insn = (lower_insn & ~0x1000) | 0x0800;
9905 else if (( r_type != R_ARM_THM_CALL)
9906 && (r_type != R_ARM_THM_JUMP24))
9908 if (elf32_thumb_to_arm_stub
9909 (info, sym_name, input_bfd, output_bfd, input_section,
9910 hit_data, sym_sec, rel->r_offset, signed_addend, value,
9912 return bfd_reloc_ok;
9914 return bfd_reloc_dangerous;
9917 else if (branch_type == ST_BRANCH_TO_THUMB
9919 && r_type == R_ARM_THM_CALL)
9921 /* Make sure this is a BL. */
9922 lower_insn |= 0x1800;
9926 enum elf32_arm_stub_type stub_type = arm_stub_none;
9927 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
9929 /* Check if a stub has to be inserted because the destination
9931 struct elf32_arm_stub_hash_entry *stub_entry;
9932 struct elf32_arm_link_hash_entry *hash;
9934 hash = (struct elf32_arm_link_hash_entry *) h;
9936 stub_type = arm_type_of_stub (info, input_section, rel,
9937 st_type, &branch_type,
9938 hash, value, sym_sec,
9939 input_bfd, sym_name);
9941 if (stub_type != arm_stub_none)
9943 /* The target is out of reach or we are changing modes, so
9944 redirect the branch to the local stub for this
9946 stub_entry = elf32_arm_get_stub_entry (input_section,
9950 if (stub_entry != NULL)
9952 value = (stub_entry->stub_offset
9953 + stub_entry->stub_sec->output_offset
9954 + stub_entry->stub_sec->output_section->vma);
9956 if (plt_offset != (bfd_vma) -1)
9957 *unresolved_reloc_p = FALSE;
9960 /* If this call becomes a call to Arm, force BLX. */
9961 if (globals->use_blx && (r_type == R_ARM_THM_CALL))
9964 && !arm_stub_is_thumb (stub_entry->stub_type))
9965 || branch_type != ST_BRANCH_TO_THUMB)
9966 lower_insn = (lower_insn & ~0x1000) | 0x0800;
9971 /* Handle calls via the PLT. */
9972 if (stub_type == arm_stub_none && plt_offset != (bfd_vma) -1)
9974 value = (splt->output_section->vma
9975 + splt->output_offset
9978 if (globals->use_blx
9979 && r_type == R_ARM_THM_CALL
9980 && ! using_thumb_only (globals))
9982 /* If the Thumb BLX instruction is available, convert
9983 the BL to a BLX instruction to call the ARM-mode
9985 lower_insn = (lower_insn & ~0x1000) | 0x0800;
9986 branch_type = ST_BRANCH_TO_ARM;
9990 if (! using_thumb_only (globals))
9991 /* Target the Thumb stub before the ARM PLT entry. */
9992 value -= PLT_THUMB_STUB_SIZE;
9993 branch_type = ST_BRANCH_TO_THUMB;
9995 *unresolved_reloc_p = FALSE;
9998 relocation = value + signed_addend;
10000 relocation -= (input_section->output_section->vma
10001 + input_section->output_offset
10004 check = relocation >> howto->rightshift;
10006 /* If this is a signed value, the rightshift just dropped
10007 leading 1 bits (assuming twos complement). */
10008 if ((bfd_signed_vma) relocation >= 0)
10009 signed_check = check;
10011 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
10013 /* Calculate the permissable maximum and minimum values for
10014 this relocation according to whether we're relocating for
10016 bitsize = howto->bitsize;
10019 reloc_signed_max = (1 << (bitsize - 1)) - 1;
10020 reloc_signed_min = ~reloc_signed_max;
10022 /* Assumes two's complement. */
10023 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
10026 if ((lower_insn & 0x5000) == 0x4000)
10027 /* For a BLX instruction, make sure that the relocation is rounded up
10028 to a word boundary. This follows the semantics of the instruction
10029 which specifies that bit 1 of the target address will come from bit
10030 1 of the base address. */
10031 relocation = (relocation + 2) & ~ 3;
10033 /* Put RELOCATION back into the insn. Assumes two's complement.
10034 We use the Thumb-2 encoding, which is safe even if dealing with
10035 a Thumb-1 instruction by virtue of our overflow check above. */
10036 reloc_sign = (signed_check < 0) ? 1 : 0;
10037 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
10038 | ((relocation >> 12) & 0x3ff)
10039 | (reloc_sign << 10);
10040 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
10041 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
10042 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
10043 | ((relocation >> 1) & 0x7ff);
10045 /* Put the relocated value back in the object file: */
10046 bfd_put_16 (input_bfd, upper_insn, hit_data);
10047 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
10049 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
10053 case R_ARM_THM_JUMP19:
10054 /* Thumb32 conditional branch instruction. */
10056 bfd_vma relocation;
10057 bfd_boolean overflow = FALSE;
10058 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
10059 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
10060 bfd_signed_vma reloc_signed_max = 0xffffe;
10061 bfd_signed_vma reloc_signed_min = -0x100000;
10062 bfd_signed_vma signed_check;
10063 enum elf32_arm_stub_type stub_type = arm_stub_none;
10064 struct elf32_arm_stub_hash_entry *stub_entry;
10065 struct elf32_arm_link_hash_entry *hash;
10067 /* Need to refetch the addend, reconstruct the top three bits,
10068 and squish the two 11 bit pieces together. */
10069 if (globals->use_rel)
10071 bfd_vma S = (upper_insn & 0x0400) >> 10;
10072 bfd_vma upper = (upper_insn & 0x003f);
10073 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
10074 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
10075 bfd_vma lower = (lower_insn & 0x07ff);
10079 upper |= (!S) << 8;
10080 upper -= 0x0100; /* Sign extend. */
10082 addend = (upper << 12) | (lower << 1);
10083 signed_addend = addend;
10086 /* Handle calls via the PLT. */
10087 if (plt_offset != (bfd_vma) -1)
10089 value = (splt->output_section->vma
10090 + splt->output_offset
10092 /* Target the Thumb stub before the ARM PLT entry. */
10093 value -= PLT_THUMB_STUB_SIZE;
10094 *unresolved_reloc_p = FALSE;
10097 hash = (struct elf32_arm_link_hash_entry *)h;
10099 stub_type = arm_type_of_stub (info, input_section, rel,
10100 st_type, &branch_type,
10101 hash, value, sym_sec,
10102 input_bfd, sym_name);
10103 if (stub_type != arm_stub_none)
10105 stub_entry = elf32_arm_get_stub_entry (input_section,
10109 if (stub_entry != NULL)
10111 value = (stub_entry->stub_offset
10112 + stub_entry->stub_sec->output_offset
10113 + stub_entry->stub_sec->output_section->vma);
10117 relocation = value + signed_addend;
10118 relocation -= (input_section->output_section->vma
10119 + input_section->output_offset
10121 signed_check = (bfd_signed_vma) relocation;
10123 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
10126 /* Put RELOCATION back into the insn. */
10128 bfd_vma S = (relocation & 0x00100000) >> 20;
10129 bfd_vma J2 = (relocation & 0x00080000) >> 19;
10130 bfd_vma J1 = (relocation & 0x00040000) >> 18;
10131 bfd_vma hi = (relocation & 0x0003f000) >> 12;
10132 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
10134 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
10135 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
10138 /* Put the relocated value back in the object file: */
10139 bfd_put_16 (input_bfd, upper_insn, hit_data);
10140 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
10142 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
10145 case R_ARM_THM_JUMP11:
10146 case R_ARM_THM_JUMP8:
10147 case R_ARM_THM_JUMP6:
10148 /* Thumb B (branch) instruction). */
10150 bfd_signed_vma relocation;
10151 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
10152 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
10153 bfd_signed_vma signed_check;
10155 /* CZB cannot jump backward. */
10156 if (r_type == R_ARM_THM_JUMP6)
10157 reloc_signed_min = 0;
10159 if (globals->use_rel)
10161 /* Need to refetch addend. */
10162 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
10163 if (addend & ((howto->src_mask + 1) >> 1))
10165 signed_addend = -1;
10166 signed_addend &= ~ howto->src_mask;
10167 signed_addend |= addend;
10170 signed_addend = addend;
10171 /* The value in the insn has been right shifted. We need to
10172 undo this, so that we can perform the address calculation
10173 in terms of bytes. */
10174 signed_addend <<= howto->rightshift;
10176 relocation = value + signed_addend;
10178 relocation -= (input_section->output_section->vma
10179 + input_section->output_offset
10182 relocation >>= howto->rightshift;
10183 signed_check = relocation;
10185 if (r_type == R_ARM_THM_JUMP6)
10186 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
10188 relocation &= howto->dst_mask;
10189 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
10191 bfd_put_16 (input_bfd, relocation, hit_data);
10193 /* Assumes two's complement. */
10194 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
10195 return bfd_reloc_overflow;
10197 return bfd_reloc_ok;
10200 case R_ARM_ALU_PCREL7_0:
10201 case R_ARM_ALU_PCREL15_8:
10202 case R_ARM_ALU_PCREL23_15:
10205 bfd_vma relocation;
10207 insn = bfd_get_32 (input_bfd, hit_data);
10208 if (globals->use_rel)
10210 /* Extract the addend. */
10211 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
10212 signed_addend = addend;
10214 relocation = value + signed_addend;
10216 relocation -= (input_section->output_section->vma
10217 + input_section->output_offset
10219 insn = (insn & ~0xfff)
10220 | ((howto->bitpos << 7) & 0xf00)
10221 | ((relocation >> howto->bitpos) & 0xff);
10222 bfd_put_32 (input_bfd, value, hit_data);
10224 return bfd_reloc_ok;
10226 case R_ARM_GNU_VTINHERIT:
10227 case R_ARM_GNU_VTENTRY:
10228 return bfd_reloc_ok;
10230 case R_ARM_GOTOFF32:
10231 /* Relocation is relative to the start of the
10232 global offset table. */
10234 BFD_ASSERT (sgot != NULL);
10236 return bfd_reloc_notsupported;
10238 /* If we are addressing a Thumb function, we need to adjust the
10239 address by one, so that attempts to call the function pointer will
10240 correctly interpret it as Thumb code. */
10241 if (branch_type == ST_BRANCH_TO_THUMB)
10244 /* Note that sgot->output_offset is not involved in this
10245 calculation. We always want the start of .got. If we
10246 define _GLOBAL_OFFSET_TABLE in a different way, as is
10247 permitted by the ABI, we might have to change this
10249 value -= sgot->output_section->vma;
10250 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10251 contents, rel->r_offset, value,
10255 /* Use global offset table as symbol value. */
10256 BFD_ASSERT (sgot != NULL);
10259 return bfd_reloc_notsupported;
10261 *unresolved_reloc_p = FALSE;
10262 value = sgot->output_section->vma;
10263 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10264 contents, rel->r_offset, value,
10268 case R_ARM_GOT_PREL:
10269 /* Relocation is to the entry for this symbol in the
10270 global offset table. */
10272 return bfd_reloc_notsupported;
10274 if (dynreloc_st_type == STT_GNU_IFUNC
10275 && plt_offset != (bfd_vma) -1
10276 && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h)))
10278 /* We have a relocation against a locally-binding STT_GNU_IFUNC
10279 symbol, and the relocation resolves directly to the runtime
10280 target rather than to the .iplt entry. This means that any
10281 .got entry would be the same value as the .igot.plt entry,
10282 so there's no point creating both. */
10283 sgot = globals->root.igotplt;
10284 value = sgot->output_offset + gotplt_offset;
10286 else if (h != NULL)
10290 off = h->got.offset;
10291 BFD_ASSERT (off != (bfd_vma) -1);
10292 if ((off & 1) != 0)
10294 /* We have already processsed one GOT relocation against
10297 if (globals->root.dynamic_sections_created
10298 && !SYMBOL_REFERENCES_LOCAL (info, h))
10299 *unresolved_reloc_p = FALSE;
10303 Elf_Internal_Rela outrel;
10305 if (h->dynindx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))
10307 /* If the symbol doesn't resolve locally in a static
10308 object, we have an undefined reference. If the
10309 symbol doesn't resolve locally in a dynamic object,
10310 it should be resolved by the dynamic linker. */
10311 if (globals->root.dynamic_sections_created)
10313 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10314 *unresolved_reloc_p = FALSE;
10318 outrel.r_addend = 0;
10322 if (dynreloc_st_type == STT_GNU_IFUNC)
10323 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
10324 else if (bfd_link_pic (info) &&
10325 (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10326 || h->root.type != bfd_link_hash_undefweak))
10327 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10330 outrel.r_addend = dynreloc_value;
10333 /* The GOT entry is initialized to zero by default.
10334 See if we should install a different value. */
10335 if (outrel.r_addend != 0
10336 && (outrel.r_info == 0 || globals->use_rel))
10338 bfd_put_32 (output_bfd, outrel.r_addend,
10339 sgot->contents + off);
10340 outrel.r_addend = 0;
10343 if (outrel.r_info != 0)
10345 outrel.r_offset = (sgot->output_section->vma
10346 + sgot->output_offset
10348 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10350 h->got.offset |= 1;
10352 value = sgot->output_offset + off;
10358 BFD_ASSERT (local_got_offsets != NULL &&
10359 local_got_offsets[r_symndx] != (bfd_vma) -1);
10361 off = local_got_offsets[r_symndx];
10363 /* The offset must always be a multiple of 4. We use the
10364 least significant bit to record whether we have already
10365 generated the necessary reloc. */
10366 if ((off & 1) != 0)
10370 if (globals->use_rel)
10371 bfd_put_32 (output_bfd, dynreloc_value, sgot->contents + off);
10373 if (bfd_link_pic (info) || dynreloc_st_type == STT_GNU_IFUNC)
10375 Elf_Internal_Rela outrel;
10377 outrel.r_addend = addend + dynreloc_value;
10378 outrel.r_offset = (sgot->output_section->vma
10379 + sgot->output_offset
10381 if (dynreloc_st_type == STT_GNU_IFUNC)
10382 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
10384 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10385 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10388 local_got_offsets[r_symndx] |= 1;
10391 value = sgot->output_offset + off;
10393 if (r_type != R_ARM_GOT32)
10394 value += sgot->output_section->vma;
10396 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10397 contents, rel->r_offset, value,
10400 case R_ARM_TLS_LDO32:
10401 value = value - dtpoff_base (info);
10403 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10404 contents, rel->r_offset, value,
10407 case R_ARM_TLS_LDM32:
10414 off = globals->tls_ldm_got.offset;
10416 if ((off & 1) != 0)
10420 /* If we don't know the module number, create a relocation
10422 if (bfd_link_pic (info))
10424 Elf_Internal_Rela outrel;
10426 if (srelgot == NULL)
10429 outrel.r_addend = 0;
10430 outrel.r_offset = (sgot->output_section->vma
10431 + sgot->output_offset + off);
10432 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
10434 if (globals->use_rel)
10435 bfd_put_32 (output_bfd, outrel.r_addend,
10436 sgot->contents + off);
10438 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10441 bfd_put_32 (output_bfd, 1, sgot->contents + off);
10443 globals->tls_ldm_got.offset |= 1;
10446 value = sgot->output_section->vma + sgot->output_offset + off
10447 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
10449 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10450 contents, rel->r_offset, value,
10454 case R_ARM_TLS_CALL:
10455 case R_ARM_THM_TLS_CALL:
10456 case R_ARM_TLS_GD32:
10457 case R_ARM_TLS_IE32:
10458 case R_ARM_TLS_GOTDESC:
10459 case R_ARM_TLS_DESCSEQ:
10460 case R_ARM_THM_TLS_DESCSEQ:
10462 bfd_vma off, offplt;
10466 BFD_ASSERT (sgot != NULL);
10471 dyn = globals->root.dynamic_sections_created;
10472 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
10473 bfd_link_pic (info),
10475 && (!bfd_link_pic (info)
10476 || !SYMBOL_REFERENCES_LOCAL (info, h)))
10478 *unresolved_reloc_p = FALSE;
10481 off = h->got.offset;
10482 offplt = elf32_arm_hash_entry (h)->tlsdesc_got;
10483 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
10487 BFD_ASSERT (local_got_offsets != NULL);
10488 off = local_got_offsets[r_symndx];
10489 offplt = local_tlsdesc_gotents[r_symndx];
10490 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
10493 /* Linker relaxations happens from one of the
10494 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
10495 if (ELF32_R_TYPE(rel->r_info) != r_type)
10496 tls_type = GOT_TLS_IE;
10498 BFD_ASSERT (tls_type != GOT_UNKNOWN);
10500 if ((off & 1) != 0)
10504 bfd_boolean need_relocs = FALSE;
10505 Elf_Internal_Rela outrel;
10508 /* The GOT entries have not been initialized yet. Do it
10509 now, and emit any relocations. If both an IE GOT and a
10510 GD GOT are necessary, we emit the GD first. */
10512 if ((bfd_link_pic (info) || indx != 0)
10514 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10515 || h->root.type != bfd_link_hash_undefweak))
10517 need_relocs = TRUE;
10518 BFD_ASSERT (srelgot != NULL);
10521 if (tls_type & GOT_TLS_GDESC)
10525 /* We should have relaxed, unless this is an undefined
10527 BFD_ASSERT ((h && (h->root.type == bfd_link_hash_undefweak))
10528 || bfd_link_pic (info));
10529 BFD_ASSERT (globals->sgotplt_jump_table_size + offplt + 8
10530 <= globals->root.sgotplt->size);
10532 outrel.r_addend = 0;
10533 outrel.r_offset = (globals->root.sgotplt->output_section->vma
10534 + globals->root.sgotplt->output_offset
10536 + globals->sgotplt_jump_table_size);
10538 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DESC);
10539 sreloc = globals->root.srelplt;
10540 loc = sreloc->contents;
10541 loc += globals->next_tls_desc_index++ * RELOC_SIZE (globals);
10542 BFD_ASSERT (loc + RELOC_SIZE (globals)
10543 <= sreloc->contents + sreloc->size);
10545 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
10547 /* For globals, the first word in the relocation gets
10548 the relocation index and the top bit set, or zero,
10549 if we're binding now. For locals, it gets the
10550 symbol's offset in the tls section. */
10551 bfd_put_32 (output_bfd,
10552 !h ? value - elf_hash_table (info)->tls_sec->vma
10553 : info->flags & DF_BIND_NOW ? 0
10554 : 0x80000000 | ELF32_R_SYM (outrel.r_info),
10555 globals->root.sgotplt->contents + offplt
10556 + globals->sgotplt_jump_table_size);
10558 /* Second word in the relocation is always zero. */
10559 bfd_put_32 (output_bfd, 0,
10560 globals->root.sgotplt->contents + offplt
10561 + globals->sgotplt_jump_table_size + 4);
10563 if (tls_type & GOT_TLS_GD)
10567 outrel.r_addend = 0;
10568 outrel.r_offset = (sgot->output_section->vma
10569 + sgot->output_offset
10571 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
10573 if (globals->use_rel)
10574 bfd_put_32 (output_bfd, outrel.r_addend,
10575 sgot->contents + cur_off);
10577 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10580 bfd_put_32 (output_bfd, value - dtpoff_base (info),
10581 sgot->contents + cur_off + 4);
10584 outrel.r_addend = 0;
10585 outrel.r_info = ELF32_R_INFO (indx,
10586 R_ARM_TLS_DTPOFF32);
10587 outrel.r_offset += 4;
10589 if (globals->use_rel)
10590 bfd_put_32 (output_bfd, outrel.r_addend,
10591 sgot->contents + cur_off + 4);
10593 elf32_arm_add_dynreloc (output_bfd, info,
10599 /* If we are not emitting relocations for a
10600 general dynamic reference, then we must be in a
10601 static link or an executable link with the
10602 symbol binding locally. Mark it as belonging
10603 to module 1, the executable. */
10604 bfd_put_32 (output_bfd, 1,
10605 sgot->contents + cur_off);
10606 bfd_put_32 (output_bfd, value - dtpoff_base (info),
10607 sgot->contents + cur_off + 4);
10613 if (tls_type & GOT_TLS_IE)
10618 outrel.r_addend = value - dtpoff_base (info);
10620 outrel.r_addend = 0;
10621 outrel.r_offset = (sgot->output_section->vma
10622 + sgot->output_offset
10624 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
10626 if (globals->use_rel)
10627 bfd_put_32 (output_bfd, outrel.r_addend,
10628 sgot->contents + cur_off);
10630 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10633 bfd_put_32 (output_bfd, tpoff (info, value),
10634 sgot->contents + cur_off);
10639 h->got.offset |= 1;
10641 local_got_offsets[r_symndx] |= 1;
10644 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
10646 else if (tls_type & GOT_TLS_GDESC)
10649 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL
10650 || ELF32_R_TYPE(rel->r_info) == R_ARM_THM_TLS_CALL)
10652 bfd_signed_vma offset;
10653 /* TLS stubs are arm mode. The original symbol is a
10654 data object, so branch_type is bogus. */
10655 branch_type = ST_BRANCH_TO_ARM;
10656 enum elf32_arm_stub_type stub_type
10657 = arm_type_of_stub (info, input_section, rel,
10658 st_type, &branch_type,
10659 (struct elf32_arm_link_hash_entry *)h,
10660 globals->tls_trampoline, globals->root.splt,
10661 input_bfd, sym_name);
10663 if (stub_type != arm_stub_none)
10665 struct elf32_arm_stub_hash_entry *stub_entry
10666 = elf32_arm_get_stub_entry
10667 (input_section, globals->root.splt, 0, rel,
10668 globals, stub_type);
10669 offset = (stub_entry->stub_offset
10670 + stub_entry->stub_sec->output_offset
10671 + stub_entry->stub_sec->output_section->vma);
10674 offset = (globals->root.splt->output_section->vma
10675 + globals->root.splt->output_offset
10676 + globals->tls_trampoline);
10678 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL)
10680 unsigned long inst;
10682 offset -= (input_section->output_section->vma
10683 + input_section->output_offset
10684 + rel->r_offset + 8);
10686 inst = offset >> 2;
10687 inst &= 0x00ffffff;
10688 value = inst | (globals->use_blx ? 0xfa000000 : 0xeb000000);
10692 /* Thumb blx encodes the offset in a complicated
10694 unsigned upper_insn, lower_insn;
10697 offset -= (input_section->output_section->vma
10698 + input_section->output_offset
10699 + rel->r_offset + 4);
10701 if (stub_type != arm_stub_none
10702 && arm_stub_is_thumb (stub_type))
10704 lower_insn = 0xd000;
10708 lower_insn = 0xc000;
10709 /* Round up the offset to a word boundary. */
10710 offset = (offset + 2) & ~2;
10714 upper_insn = (0xf000
10715 | ((offset >> 12) & 0x3ff)
10717 lower_insn |= (((!((offset >> 23) & 1)) ^ neg) << 13)
10718 | (((!((offset >> 22) & 1)) ^ neg) << 11)
10719 | ((offset >> 1) & 0x7ff);
10720 bfd_put_16 (input_bfd, upper_insn, hit_data);
10721 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
10722 return bfd_reloc_ok;
10725 /* These relocations needs special care, as besides the fact
10726 they point somewhere in .gotplt, the addend must be
10727 adjusted accordingly depending on the type of instruction
10729 else if ((r_type == R_ARM_TLS_GOTDESC) && (tls_type & GOT_TLS_GDESC))
10731 unsigned long data, insn;
10734 data = bfd_get_32 (input_bfd, hit_data);
10740 insn = bfd_get_16 (input_bfd, contents + rel->r_offset - data);
10741 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
10742 insn = (insn << 16)
10743 | bfd_get_16 (input_bfd,
10744 contents + rel->r_offset - data + 2);
10745 if ((insn & 0xf800c000) == 0xf000c000)
10748 else if ((insn & 0xffffff00) == 0x4400)
10753 (*_bfd_error_handler)
10754 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
10755 input_bfd, input_section,
10756 (unsigned long)rel->r_offset, insn);
10757 return bfd_reloc_notsupported;
10762 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - data);
10764 switch (insn >> 24)
10766 case 0xeb: /* bl */
10767 case 0xfa: /* blx */
10771 case 0xe0: /* add */
10776 (*_bfd_error_handler)
10777 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
10778 input_bfd, input_section,
10779 (unsigned long)rel->r_offset, insn);
10780 return bfd_reloc_notsupported;
10784 value += ((globals->root.sgotplt->output_section->vma
10785 + globals->root.sgotplt->output_offset + off)
10786 - (input_section->output_section->vma
10787 + input_section->output_offset
10789 + globals->sgotplt_jump_table_size);
10792 value = ((globals->root.sgot->output_section->vma
10793 + globals->root.sgot->output_offset + off)
10794 - (input_section->output_section->vma
10795 + input_section->output_offset + rel->r_offset));
10797 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10798 contents, rel->r_offset, value,
10802 case R_ARM_TLS_LE32:
10803 if (bfd_link_dll (info))
10805 (*_bfd_error_handler)
10806 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
10807 input_bfd, input_section,
10808 (long) rel->r_offset, howto->name);
10809 return bfd_reloc_notsupported;
10812 value = tpoff (info, value);
10814 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10815 contents, rel->r_offset, value,
10819 if (globals->fix_v4bx)
10821 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10823 /* Ensure that we have a BX instruction. */
10824 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
10826 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
10828 /* Branch to veneer. */
10830 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
10831 glue_addr -= input_section->output_section->vma
10832 + input_section->output_offset
10833 + rel->r_offset + 8;
10834 insn = (insn & 0xf0000000) | 0x0a000000
10835 | ((glue_addr >> 2) & 0x00ffffff);
10839 /* Preserve Rm (lowest four bits) and the condition code
10840 (highest four bits). Other bits encode MOV PC,Rm. */
10841 insn = (insn & 0xf000000f) | 0x01a0f000;
10844 bfd_put_32 (input_bfd, insn, hit_data);
10846 return bfd_reloc_ok;
10848 case R_ARM_MOVW_ABS_NC:
10849 case R_ARM_MOVT_ABS:
10850 case R_ARM_MOVW_PREL_NC:
10851 case R_ARM_MOVT_PREL:
10852 /* Until we properly support segment-base-relative addressing then
10853 we assume the segment base to be zero, as for the group relocations.
10854 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
10855 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
10856 case R_ARM_MOVW_BREL_NC:
10857 case R_ARM_MOVW_BREL:
10858 case R_ARM_MOVT_BREL:
10860 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10862 if (globals->use_rel)
10864 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
10865 signed_addend = (addend ^ 0x8000) - 0x8000;
10868 value += signed_addend;
10870 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
10871 value -= (input_section->output_section->vma
10872 + input_section->output_offset + rel->r_offset);
10874 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
10875 return bfd_reloc_overflow;
10877 if (branch_type == ST_BRANCH_TO_THUMB)
10880 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
10881 || r_type == R_ARM_MOVT_BREL)
10884 insn &= 0xfff0f000;
10885 insn |= value & 0xfff;
10886 insn |= (value & 0xf000) << 4;
10887 bfd_put_32 (input_bfd, insn, hit_data);
10889 return bfd_reloc_ok;
10891 case R_ARM_THM_MOVW_ABS_NC:
10892 case R_ARM_THM_MOVT_ABS:
10893 case R_ARM_THM_MOVW_PREL_NC:
10894 case R_ARM_THM_MOVT_PREL:
10895 /* Until we properly support segment-base-relative addressing then
10896 we assume the segment base to be zero, as for the above relocations.
10897 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
10898 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
10899 as R_ARM_THM_MOVT_ABS. */
10900 case R_ARM_THM_MOVW_BREL_NC:
10901 case R_ARM_THM_MOVW_BREL:
10902 case R_ARM_THM_MOVT_BREL:
10906 insn = bfd_get_16 (input_bfd, hit_data) << 16;
10907 insn |= bfd_get_16 (input_bfd, hit_data + 2);
10909 if (globals->use_rel)
10911 addend = ((insn >> 4) & 0xf000)
10912 | ((insn >> 15) & 0x0800)
10913 | ((insn >> 4) & 0x0700)
10915 signed_addend = (addend ^ 0x8000) - 0x8000;
10918 value += signed_addend;
10920 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
10921 value -= (input_section->output_section->vma
10922 + input_section->output_offset + rel->r_offset);
10924 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
10925 return bfd_reloc_overflow;
10927 if (branch_type == ST_BRANCH_TO_THUMB)
10930 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
10931 || r_type == R_ARM_THM_MOVT_BREL)
10934 insn &= 0xfbf08f00;
10935 insn |= (value & 0xf000) << 4;
10936 insn |= (value & 0x0800) << 15;
10937 insn |= (value & 0x0700) << 4;
10938 insn |= (value & 0x00ff);
10940 bfd_put_16 (input_bfd, insn >> 16, hit_data);
10941 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
10943 return bfd_reloc_ok;
10945 case R_ARM_ALU_PC_G0_NC:
10946 case R_ARM_ALU_PC_G1_NC:
10947 case R_ARM_ALU_PC_G0:
10948 case R_ARM_ALU_PC_G1:
10949 case R_ARM_ALU_PC_G2:
10950 case R_ARM_ALU_SB_G0_NC:
10951 case R_ARM_ALU_SB_G1_NC:
10952 case R_ARM_ALU_SB_G0:
10953 case R_ARM_ALU_SB_G1:
10954 case R_ARM_ALU_SB_G2:
10956 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10957 bfd_vma pc = input_section->output_section->vma
10958 + input_section->output_offset + rel->r_offset;
10959 /* sb is the origin of the *segment* containing the symbol. */
10960 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
10963 bfd_signed_vma signed_value;
10966 /* Determine which group of bits to select. */
10969 case R_ARM_ALU_PC_G0_NC:
10970 case R_ARM_ALU_PC_G0:
10971 case R_ARM_ALU_SB_G0_NC:
10972 case R_ARM_ALU_SB_G0:
10976 case R_ARM_ALU_PC_G1_NC:
10977 case R_ARM_ALU_PC_G1:
10978 case R_ARM_ALU_SB_G1_NC:
10979 case R_ARM_ALU_SB_G1:
10983 case R_ARM_ALU_PC_G2:
10984 case R_ARM_ALU_SB_G2:
10992 /* If REL, extract the addend from the insn. If RELA, it will
10993 have already been fetched for us. */
10994 if (globals->use_rel)
10997 bfd_vma constant = insn & 0xff;
10998 bfd_vma rotation = (insn & 0xf00) >> 8;
11001 signed_addend = constant;
11004 /* Compensate for the fact that in the instruction, the
11005 rotation is stored in multiples of 2 bits. */
11008 /* Rotate "constant" right by "rotation" bits. */
11009 signed_addend = (constant >> rotation) |
11010 (constant << (8 * sizeof (bfd_vma) - rotation));
11013 /* Determine if the instruction is an ADD or a SUB.
11014 (For REL, this determines the sign of the addend.) */
11015 negative = identify_add_or_sub (insn);
11018 (*_bfd_error_handler)
11019 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
11020 input_bfd, input_section,
11021 (long) rel->r_offset, howto->name);
11022 return bfd_reloc_overflow;
11025 signed_addend *= negative;
11028 /* Compute the value (X) to go in the place. */
11029 if (r_type == R_ARM_ALU_PC_G0_NC
11030 || r_type == R_ARM_ALU_PC_G1_NC
11031 || r_type == R_ARM_ALU_PC_G0
11032 || r_type == R_ARM_ALU_PC_G1
11033 || r_type == R_ARM_ALU_PC_G2)
11035 signed_value = value - pc + signed_addend;
11037 /* Section base relative. */
11038 signed_value = value - sb + signed_addend;
11040 /* If the target symbol is a Thumb function, then set the
11041 Thumb bit in the address. */
11042 if (branch_type == ST_BRANCH_TO_THUMB)
11045 /* Calculate the value of the relevant G_n, in encoded
11046 constant-with-rotation format. */
11047 g_n = calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11050 /* Check for overflow if required. */
11051 if ((r_type == R_ARM_ALU_PC_G0
11052 || r_type == R_ARM_ALU_PC_G1
11053 || r_type == R_ARM_ALU_PC_G2
11054 || r_type == R_ARM_ALU_SB_G0
11055 || r_type == R_ARM_ALU_SB_G1
11056 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
11058 (*_bfd_error_handler)
11059 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11060 input_bfd, input_section,
11061 (long) rel->r_offset, signed_value < 0 ? - signed_value : signed_value,
11063 return bfd_reloc_overflow;
11066 /* Mask out the value and the ADD/SUB part of the opcode; take care
11067 not to destroy the S bit. */
11068 insn &= 0xff1ff000;
11070 /* Set the opcode according to whether the value to go in the
11071 place is negative. */
11072 if (signed_value < 0)
11077 /* Encode the offset. */
11080 bfd_put_32 (input_bfd, insn, hit_data);
11082 return bfd_reloc_ok;
11084 case R_ARM_LDR_PC_G0:
11085 case R_ARM_LDR_PC_G1:
11086 case R_ARM_LDR_PC_G2:
11087 case R_ARM_LDR_SB_G0:
11088 case R_ARM_LDR_SB_G1:
11089 case R_ARM_LDR_SB_G2:
11091 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11092 bfd_vma pc = input_section->output_section->vma
11093 + input_section->output_offset + rel->r_offset;
11094 /* sb is the origin of the *segment* containing the symbol. */
11095 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11097 bfd_signed_vma signed_value;
11100 /* Determine which groups of bits to calculate. */
11103 case R_ARM_LDR_PC_G0:
11104 case R_ARM_LDR_SB_G0:
11108 case R_ARM_LDR_PC_G1:
11109 case R_ARM_LDR_SB_G1:
11113 case R_ARM_LDR_PC_G2:
11114 case R_ARM_LDR_SB_G2:
11122 /* If REL, extract the addend from the insn. If RELA, it will
11123 have already been fetched for us. */
11124 if (globals->use_rel)
11126 int negative = (insn & (1 << 23)) ? 1 : -1;
11127 signed_addend = negative * (insn & 0xfff);
11130 /* Compute the value (X) to go in the place. */
11131 if (r_type == R_ARM_LDR_PC_G0
11132 || r_type == R_ARM_LDR_PC_G1
11133 || r_type == R_ARM_LDR_PC_G2)
11135 signed_value = value - pc + signed_addend;
11137 /* Section base relative. */
11138 signed_value = value - sb + signed_addend;
11140 /* Calculate the value of the relevant G_{n-1} to obtain
11141 the residual at that stage. */
11142 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11143 group - 1, &residual);
11145 /* Check for overflow. */
11146 if (residual >= 0x1000)
11148 (*_bfd_error_handler)
11149 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11150 input_bfd, input_section,
11151 (long) rel->r_offset, labs (signed_value), howto->name);
11152 return bfd_reloc_overflow;
11155 /* Mask out the value and U bit. */
11156 insn &= 0xff7ff000;
11158 /* Set the U bit if the value to go in the place is non-negative. */
11159 if (signed_value >= 0)
11162 /* Encode the offset. */
11165 bfd_put_32 (input_bfd, insn, hit_data);
11167 return bfd_reloc_ok;
11169 case R_ARM_LDRS_PC_G0:
11170 case R_ARM_LDRS_PC_G1:
11171 case R_ARM_LDRS_PC_G2:
11172 case R_ARM_LDRS_SB_G0:
11173 case R_ARM_LDRS_SB_G1:
11174 case R_ARM_LDRS_SB_G2:
11176 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11177 bfd_vma pc = input_section->output_section->vma
11178 + input_section->output_offset + rel->r_offset;
11179 /* sb is the origin of the *segment* containing the symbol. */
11180 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11182 bfd_signed_vma signed_value;
11185 /* Determine which groups of bits to calculate. */
11188 case R_ARM_LDRS_PC_G0:
11189 case R_ARM_LDRS_SB_G0:
11193 case R_ARM_LDRS_PC_G1:
11194 case R_ARM_LDRS_SB_G1:
11198 case R_ARM_LDRS_PC_G2:
11199 case R_ARM_LDRS_SB_G2:
11207 /* If REL, extract the addend from the insn. If RELA, it will
11208 have already been fetched for us. */
11209 if (globals->use_rel)
11211 int negative = (insn & (1 << 23)) ? 1 : -1;
11212 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
11215 /* Compute the value (X) to go in the place. */
11216 if (r_type == R_ARM_LDRS_PC_G0
11217 || r_type == R_ARM_LDRS_PC_G1
11218 || r_type == R_ARM_LDRS_PC_G2)
11220 signed_value = value - pc + signed_addend;
11222 /* Section base relative. */
11223 signed_value = value - sb + signed_addend;
11225 /* Calculate the value of the relevant G_{n-1} to obtain
11226 the residual at that stage. */
11227 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11228 group - 1, &residual);
11230 /* Check for overflow. */
11231 if (residual >= 0x100)
11233 (*_bfd_error_handler)
11234 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11235 input_bfd, input_section,
11236 (long) rel->r_offset, labs (signed_value), howto->name);
11237 return bfd_reloc_overflow;
11240 /* Mask out the value and U bit. */
11241 insn &= 0xff7ff0f0;
11243 /* Set the U bit if the value to go in the place is non-negative. */
11244 if (signed_value >= 0)
11247 /* Encode the offset. */
11248 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
11250 bfd_put_32 (input_bfd, insn, hit_data);
11252 return bfd_reloc_ok;
11254 case R_ARM_LDC_PC_G0:
11255 case R_ARM_LDC_PC_G1:
11256 case R_ARM_LDC_PC_G2:
11257 case R_ARM_LDC_SB_G0:
11258 case R_ARM_LDC_SB_G1:
11259 case R_ARM_LDC_SB_G2:
11261 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11262 bfd_vma pc = input_section->output_section->vma
11263 + input_section->output_offset + rel->r_offset;
11264 /* sb is the origin of the *segment* containing the symbol. */
11265 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11267 bfd_signed_vma signed_value;
11270 /* Determine which groups of bits to calculate. */
11273 case R_ARM_LDC_PC_G0:
11274 case R_ARM_LDC_SB_G0:
11278 case R_ARM_LDC_PC_G1:
11279 case R_ARM_LDC_SB_G1:
11283 case R_ARM_LDC_PC_G2:
11284 case R_ARM_LDC_SB_G2:
11292 /* If REL, extract the addend from the insn. If RELA, it will
11293 have already been fetched for us. */
11294 if (globals->use_rel)
11296 int negative = (insn & (1 << 23)) ? 1 : -1;
11297 signed_addend = negative * ((insn & 0xff) << 2);
11300 /* Compute the value (X) to go in the place. */
11301 if (r_type == R_ARM_LDC_PC_G0
11302 || r_type == R_ARM_LDC_PC_G1
11303 || r_type == R_ARM_LDC_PC_G2)
11305 signed_value = value - pc + signed_addend;
11307 /* Section base relative. */
11308 signed_value = value - sb + signed_addend;
11310 /* Calculate the value of the relevant G_{n-1} to obtain
11311 the residual at that stage. */
11312 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11313 group - 1, &residual);
11315 /* Check for overflow. (The absolute value to go in the place must be
11316 divisible by four and, after having been divided by four, must
11317 fit in eight bits.) */
11318 if ((residual & 0x3) != 0 || residual >= 0x400)
11320 (*_bfd_error_handler)
11321 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11322 input_bfd, input_section,
11323 (long) rel->r_offset, labs (signed_value), howto->name);
11324 return bfd_reloc_overflow;
11327 /* Mask out the value and U bit. */
11328 insn &= 0xff7fff00;
11330 /* Set the U bit if the value to go in the place is non-negative. */
11331 if (signed_value >= 0)
11334 /* Encode the offset. */
11335 insn |= residual >> 2;
11337 bfd_put_32 (input_bfd, insn, hit_data);
11339 return bfd_reloc_ok;
11341 case R_ARM_THM_ALU_ABS_G0_NC:
11342 case R_ARM_THM_ALU_ABS_G1_NC:
11343 case R_ARM_THM_ALU_ABS_G2_NC:
11344 case R_ARM_THM_ALU_ABS_G3_NC:
11346 const int shift_array[4] = {0, 8, 16, 24};
11347 bfd_vma insn = bfd_get_16 (input_bfd, hit_data);
11348 bfd_vma addr = value;
11349 int shift = shift_array[r_type - R_ARM_THM_ALU_ABS_G0_NC];
11351 /* Compute address. */
11352 if (globals->use_rel)
11353 signed_addend = insn & 0xff;
11354 addr += signed_addend;
11355 if (branch_type == ST_BRANCH_TO_THUMB)
11357 /* Clean imm8 insn. */
11359 /* And update with correct part of address. */
11360 insn |= (addr >> shift) & 0xff;
11362 bfd_put_16 (input_bfd, insn, hit_data);
11365 *unresolved_reloc_p = FALSE;
11366 return bfd_reloc_ok;
11369 return bfd_reloc_notsupported;
11373 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
11375 arm_add_to_rel (bfd * abfd,
11376 bfd_byte * address,
11377 reloc_howto_type * howto,
11378 bfd_signed_vma increment)
11380 bfd_signed_vma addend;
11382 if (howto->type == R_ARM_THM_CALL
11383 || howto->type == R_ARM_THM_JUMP24)
11385 int upper_insn, lower_insn;
11388 upper_insn = bfd_get_16 (abfd, address);
11389 lower_insn = bfd_get_16 (abfd, address + 2);
11390 upper = upper_insn & 0x7ff;
11391 lower = lower_insn & 0x7ff;
11393 addend = (upper << 12) | (lower << 1);
11394 addend += increment;
11397 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
11398 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
11400 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
11401 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
11407 contents = bfd_get_32 (abfd, address);
11409 /* Get the (signed) value from the instruction. */
11410 addend = contents & howto->src_mask;
11411 if (addend & ((howto->src_mask + 1) >> 1))
11413 bfd_signed_vma mask;
11416 mask &= ~ howto->src_mask;
11420 /* Add in the increment, (which is a byte value). */
11421 switch (howto->type)
11424 addend += increment;
11431 addend <<= howto->size;
11432 addend += increment;
11434 /* Should we check for overflow here ? */
11436 /* Drop any undesired bits. */
11437 addend >>= howto->rightshift;
11441 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
11443 bfd_put_32 (abfd, contents, address);
11447 #define IS_ARM_TLS_RELOC(R_TYPE) \
11448 ((R_TYPE) == R_ARM_TLS_GD32 \
11449 || (R_TYPE) == R_ARM_TLS_LDO32 \
11450 || (R_TYPE) == R_ARM_TLS_LDM32 \
11451 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
11452 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
11453 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
11454 || (R_TYPE) == R_ARM_TLS_LE32 \
11455 || (R_TYPE) == R_ARM_TLS_IE32 \
11456 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
11458 /* Specific set of relocations for the gnu tls dialect. */
11459 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
11460 ((R_TYPE) == R_ARM_TLS_GOTDESC \
11461 || (R_TYPE) == R_ARM_TLS_CALL \
11462 || (R_TYPE) == R_ARM_THM_TLS_CALL \
11463 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
11464 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
11466 /* Relocate an ARM ELF section. */
11469 elf32_arm_relocate_section (bfd * output_bfd,
11470 struct bfd_link_info * info,
11472 asection * input_section,
11473 bfd_byte * contents,
11474 Elf_Internal_Rela * relocs,
11475 Elf_Internal_Sym * local_syms,
11476 asection ** local_sections)
11478 Elf_Internal_Shdr *symtab_hdr;
11479 struct elf_link_hash_entry **sym_hashes;
11480 Elf_Internal_Rela *rel;
11481 Elf_Internal_Rela *relend;
11483 struct elf32_arm_link_hash_table * globals;
11485 globals = elf32_arm_hash_table (info);
11486 if (globals == NULL)
11489 symtab_hdr = & elf_symtab_hdr (input_bfd);
11490 sym_hashes = elf_sym_hashes (input_bfd);
11493 relend = relocs + input_section->reloc_count;
11494 for (; rel < relend; rel++)
11497 reloc_howto_type * howto;
11498 unsigned long r_symndx;
11499 Elf_Internal_Sym * sym;
11501 struct elf_link_hash_entry * h;
11502 bfd_vma relocation;
11503 bfd_reloc_status_type r;
11506 bfd_boolean unresolved_reloc = FALSE;
11507 char *error_message = NULL;
11509 r_symndx = ELF32_R_SYM (rel->r_info);
11510 r_type = ELF32_R_TYPE (rel->r_info);
11511 r_type = arm_real_reloc_type (globals, r_type);
11513 if ( r_type == R_ARM_GNU_VTENTRY
11514 || r_type == R_ARM_GNU_VTINHERIT)
11517 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
11518 howto = bfd_reloc.howto;
11524 if (r_symndx < symtab_hdr->sh_info)
11526 sym = local_syms + r_symndx;
11527 sym_type = ELF32_ST_TYPE (sym->st_info);
11528 sec = local_sections[r_symndx];
11530 /* An object file might have a reference to a local
11531 undefined symbol. This is a daft object file, but we
11532 should at least do something about it. V4BX & NONE
11533 relocations do not use the symbol and are explicitly
11534 allowed to use the undefined symbol, so allow those.
11535 Likewise for relocations against STN_UNDEF. */
11536 if (r_type != R_ARM_V4BX
11537 && r_type != R_ARM_NONE
11538 && r_symndx != STN_UNDEF
11539 && bfd_is_und_section (sec)
11540 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
11541 (*info->callbacks->undefined_symbol)
11542 (info, bfd_elf_string_from_elf_section
11543 (input_bfd, symtab_hdr->sh_link, sym->st_name),
11544 input_bfd, input_section,
11545 rel->r_offset, TRUE);
11547 if (globals->use_rel)
11549 relocation = (sec->output_section->vma
11550 + sec->output_offset
11552 if (!bfd_link_relocatable (info)
11553 && (sec->flags & SEC_MERGE)
11554 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11557 bfd_vma addend, value;
11561 case R_ARM_MOVW_ABS_NC:
11562 case R_ARM_MOVT_ABS:
11563 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
11564 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
11565 addend = (addend ^ 0x8000) - 0x8000;
11568 case R_ARM_THM_MOVW_ABS_NC:
11569 case R_ARM_THM_MOVT_ABS:
11570 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
11572 value |= bfd_get_16 (input_bfd,
11573 contents + rel->r_offset + 2);
11574 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
11575 | ((value & 0x04000000) >> 15);
11576 addend = (addend ^ 0x8000) - 0x8000;
11580 if (howto->rightshift
11581 || (howto->src_mask & (howto->src_mask + 1)))
11583 (*_bfd_error_handler)
11584 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
11585 input_bfd, input_section,
11586 (long) rel->r_offset, howto->name);
11590 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
11592 /* Get the (signed) value from the instruction. */
11593 addend = value & howto->src_mask;
11594 if (addend & ((howto->src_mask + 1) >> 1))
11596 bfd_signed_vma mask;
11599 mask &= ~ howto->src_mask;
11607 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
11609 addend += msec->output_section->vma + msec->output_offset;
11611 /* Cases here must match those in the preceding
11612 switch statement. */
11615 case R_ARM_MOVW_ABS_NC:
11616 case R_ARM_MOVT_ABS:
11617 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
11618 | (addend & 0xfff);
11619 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
11622 case R_ARM_THM_MOVW_ABS_NC:
11623 case R_ARM_THM_MOVT_ABS:
11624 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
11625 | (addend & 0xff) | ((addend & 0x0800) << 15);
11626 bfd_put_16 (input_bfd, value >> 16,
11627 contents + rel->r_offset);
11628 bfd_put_16 (input_bfd, value,
11629 contents + rel->r_offset + 2);
11633 value = (value & ~ howto->dst_mask)
11634 | (addend & howto->dst_mask);
11635 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
11641 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11645 bfd_boolean warned, ignored;
11647 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11648 r_symndx, symtab_hdr, sym_hashes,
11649 h, sec, relocation,
11650 unresolved_reloc, warned, ignored);
11652 sym_type = h->type;
11655 if (sec != NULL && discarded_section (sec))
11656 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11657 rel, 1, relend, howto, 0, contents);
11659 if (bfd_link_relocatable (info))
11661 /* This is a relocatable link. We don't have to change
11662 anything, unless the reloc is against a section symbol,
11663 in which case we have to adjust according to where the
11664 section symbol winds up in the output section. */
11665 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11667 if (globals->use_rel)
11668 arm_add_to_rel (input_bfd, contents + rel->r_offset,
11669 howto, (bfd_signed_vma) sec->output_offset);
11671 rel->r_addend += sec->output_offset;
11677 name = h->root.root.string;
11680 name = (bfd_elf_string_from_elf_section
11681 (input_bfd, symtab_hdr->sh_link, sym->st_name));
11682 if (name == NULL || *name == '\0')
11683 name = bfd_section_name (input_bfd, sec);
11686 if (r_symndx != STN_UNDEF
11687 && r_type != R_ARM_NONE
11689 || h->root.type == bfd_link_hash_defined
11690 || h->root.type == bfd_link_hash_defweak)
11691 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
11693 (*_bfd_error_handler)
11694 ((sym_type == STT_TLS
11695 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11696 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
11699 (long) rel->r_offset,
11704 /* We call elf32_arm_final_link_relocate unless we're completely
11705 done, i.e., the relaxation produced the final output we want,
11706 and we won't let anybody mess with it. Also, we have to do
11707 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
11708 both in relaxed and non-relaxed cases. */
11709 if ((elf32_arm_tls_transition (info, r_type, h) != (unsigned)r_type)
11710 || (IS_ARM_TLS_GNU_RELOC (r_type)
11711 && !((h ? elf32_arm_hash_entry (h)->tls_type :
11712 elf32_arm_local_got_tls_type (input_bfd)[r_symndx])
11715 r = elf32_arm_tls_relax (globals, input_bfd, input_section,
11716 contents, rel, h == NULL);
11717 /* This may have been marked unresolved because it came from
11718 a shared library. But we've just dealt with that. */
11719 unresolved_reloc = 0;
11722 r = bfd_reloc_continue;
11724 if (r == bfd_reloc_continue)
11726 unsigned char branch_type =
11727 h ? ARM_GET_SYM_BRANCH_TYPE (h->target_internal)
11728 : ARM_GET_SYM_BRANCH_TYPE (sym->st_target_internal);
11730 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
11731 input_section, contents, rel,
11732 relocation, info, sec, name,
11733 sym_type, branch_type, h,
11738 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11739 because such sections are not SEC_ALLOC and thus ld.so will
11740 not process them. */
11741 if (unresolved_reloc
11742 && !((input_section->flags & SEC_DEBUGGING) != 0
11744 && _bfd_elf_section_offset (output_bfd, info, input_section,
11745 rel->r_offset) != (bfd_vma) -1)
11747 (*_bfd_error_handler)
11748 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11751 (long) rel->r_offset,
11753 h->root.root.string);
11757 if (r != bfd_reloc_ok)
11761 case bfd_reloc_overflow:
11762 /* If the overflowing reloc was to an undefined symbol,
11763 we have already printed one error message and there
11764 is no point complaining again. */
11765 if (!h || h->root.type != bfd_link_hash_undefined)
11766 (*info->callbacks->reloc_overflow)
11767 (info, (h ? &h->root : NULL), name, howto->name,
11768 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
11771 case bfd_reloc_undefined:
11772 (*info->callbacks->undefined_symbol)
11773 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
11776 case bfd_reloc_outofrange:
11777 error_message = _("out of range");
11780 case bfd_reloc_notsupported:
11781 error_message = _("unsupported relocation");
11784 case bfd_reloc_dangerous:
11785 /* error_message should already be set. */
11789 error_message = _("unknown error");
11790 /* Fall through. */
11793 BFD_ASSERT (error_message != NULL);
11794 (*info->callbacks->reloc_dangerous)
11795 (info, error_message, input_bfd, input_section, rel->r_offset);
11804 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
11805 adds the edit to the start of the list. (The list must be built in order of
11806 ascending TINDEX: the function's callers are primarily responsible for
11807 maintaining that condition). */
11810 add_unwind_table_edit (arm_unwind_table_edit **head,
11811 arm_unwind_table_edit **tail,
11812 arm_unwind_edit_type type,
11813 asection *linked_section,
11814 unsigned int tindex)
11816 arm_unwind_table_edit *new_edit = (arm_unwind_table_edit *)
11817 xmalloc (sizeof (arm_unwind_table_edit));
11819 new_edit->type = type;
11820 new_edit->linked_section = linked_section;
11821 new_edit->index = tindex;
11825 new_edit->next = NULL;
11828 (*tail)->next = new_edit;
11830 (*tail) = new_edit;
11833 (*head) = new_edit;
11837 new_edit->next = *head;
11846 static _arm_elf_section_data *get_arm_elf_section_data (asection *);
11848 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
11850 adjust_exidx_size(asection *exidx_sec, int adjust)
11854 if (!exidx_sec->rawsize)
11855 exidx_sec->rawsize = exidx_sec->size;
11857 bfd_set_section_size (exidx_sec->owner, exidx_sec, exidx_sec->size + adjust);
11858 out_sec = exidx_sec->output_section;
11859 /* Adjust size of output section. */
11860 bfd_set_section_size (out_sec->owner, out_sec, out_sec->size +adjust);
11863 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
11865 insert_cantunwind_after(asection *text_sec, asection *exidx_sec)
11867 struct _arm_elf_section_data *exidx_arm_data;
11869 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
11870 add_unwind_table_edit (
11871 &exidx_arm_data->u.exidx.unwind_edit_list,
11872 &exidx_arm_data->u.exidx.unwind_edit_tail,
11873 INSERT_EXIDX_CANTUNWIND_AT_END, text_sec, UINT_MAX);
11875 exidx_arm_data->additional_reloc_count++;
11877 adjust_exidx_size(exidx_sec, 8);
11880 /* Scan .ARM.exidx tables, and create a list describing edits which should be
11881 made to those tables, such that:
11883 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
11884 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
11885 codes which have been inlined into the index).
11887 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
11889 The edits are applied when the tables are written
11890 (in elf32_arm_write_section). */
11893 elf32_arm_fix_exidx_coverage (asection **text_section_order,
11894 unsigned int num_text_sections,
11895 struct bfd_link_info *info,
11896 bfd_boolean merge_exidx_entries)
11899 unsigned int last_second_word = 0, i;
11900 asection *last_exidx_sec = NULL;
11901 asection *last_text_sec = NULL;
11902 int last_unwind_type = -1;
11904 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
11906 for (inp = info->input_bfds; inp != NULL; inp = inp->link.next)
11910 for (sec = inp->sections; sec != NULL; sec = sec->next)
11912 struct bfd_elf_section_data *elf_sec = elf_section_data (sec);
11913 Elf_Internal_Shdr *hdr = &elf_sec->this_hdr;
11915 if (!hdr || hdr->sh_type != SHT_ARM_EXIDX)
11918 if (elf_sec->linked_to)
11920 Elf_Internal_Shdr *linked_hdr
11921 = &elf_section_data (elf_sec->linked_to)->this_hdr;
11922 struct _arm_elf_section_data *linked_sec_arm_data
11923 = get_arm_elf_section_data (linked_hdr->bfd_section);
11925 if (linked_sec_arm_data == NULL)
11928 /* Link this .ARM.exidx section back from the text section it
11930 linked_sec_arm_data->u.text.arm_exidx_sec = sec;
11935 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
11936 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
11937 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
11939 for (i = 0; i < num_text_sections; i++)
11941 asection *sec = text_section_order[i];
11942 asection *exidx_sec;
11943 struct _arm_elf_section_data *arm_data = get_arm_elf_section_data (sec);
11944 struct _arm_elf_section_data *exidx_arm_data;
11945 bfd_byte *contents = NULL;
11946 int deleted_exidx_bytes = 0;
11948 arm_unwind_table_edit *unwind_edit_head = NULL;
11949 arm_unwind_table_edit *unwind_edit_tail = NULL;
11950 Elf_Internal_Shdr *hdr;
11953 if (arm_data == NULL)
11956 exidx_sec = arm_data->u.text.arm_exidx_sec;
11957 if (exidx_sec == NULL)
11959 /* Section has no unwind data. */
11960 if (last_unwind_type == 0 || !last_exidx_sec)
11963 /* Ignore zero sized sections. */
11964 if (sec->size == 0)
11967 insert_cantunwind_after(last_text_sec, last_exidx_sec);
11968 last_unwind_type = 0;
11972 /* Skip /DISCARD/ sections. */
11973 if (bfd_is_abs_section (exidx_sec->output_section))
11976 hdr = &elf_section_data (exidx_sec)->this_hdr;
11977 if (hdr->sh_type != SHT_ARM_EXIDX)
11980 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
11981 if (exidx_arm_data == NULL)
11984 ibfd = exidx_sec->owner;
11986 if (hdr->contents != NULL)
11987 contents = hdr->contents;
11988 else if (! bfd_malloc_and_get_section (ibfd, exidx_sec, &contents))
11992 if (last_unwind_type > 0)
11994 unsigned int first_word = bfd_get_32 (ibfd, contents);
11995 /* Add cantunwind if first unwind item does not match section
11997 if (first_word != sec->vma)
11999 insert_cantunwind_after (last_text_sec, last_exidx_sec);
12000 last_unwind_type = 0;
12004 for (j = 0; j < hdr->sh_size; j += 8)
12006 unsigned int second_word = bfd_get_32 (ibfd, contents + j + 4);
12010 /* An EXIDX_CANTUNWIND entry. */
12011 if (second_word == 1)
12013 if (last_unwind_type == 0)
12017 /* Inlined unwinding data. Merge if equal to previous. */
12018 else if ((second_word & 0x80000000) != 0)
12020 if (merge_exidx_entries
12021 && last_second_word == second_word && last_unwind_type == 1)
12024 last_second_word = second_word;
12026 /* Normal table entry. In theory we could merge these too,
12027 but duplicate entries are likely to be much less common. */
12031 if (elide && !bfd_link_relocatable (info))
12033 add_unwind_table_edit (&unwind_edit_head, &unwind_edit_tail,
12034 DELETE_EXIDX_ENTRY, NULL, j / 8);
12036 deleted_exidx_bytes += 8;
12039 last_unwind_type = unwind_type;
12042 /* Free contents if we allocated it ourselves. */
12043 if (contents != hdr->contents)
12046 /* Record edits to be applied later (in elf32_arm_write_section). */
12047 exidx_arm_data->u.exidx.unwind_edit_list = unwind_edit_head;
12048 exidx_arm_data->u.exidx.unwind_edit_tail = unwind_edit_tail;
12050 if (deleted_exidx_bytes > 0)
12051 adjust_exidx_size(exidx_sec, -deleted_exidx_bytes);
12053 last_exidx_sec = exidx_sec;
12054 last_text_sec = sec;
12057 /* Add terminating CANTUNWIND entry. */
12058 if (!bfd_link_relocatable (info) && last_exidx_sec
12059 && last_unwind_type != 0)
12060 insert_cantunwind_after(last_text_sec, last_exidx_sec);
12066 elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd,
12067 bfd *ibfd, const char *name)
12069 asection *sec, *osec;
12071 sec = bfd_get_linker_section (ibfd, name);
12072 if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0)
12075 osec = sec->output_section;
12076 if (elf32_arm_write_section (obfd, info, sec, sec->contents))
12079 if (! bfd_set_section_contents (obfd, osec, sec->contents,
12080 sec->output_offset, sec->size))
12087 elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info)
12089 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
12090 asection *sec, *osec;
12092 if (globals == NULL)
12095 /* Invoke the regular ELF backend linker to do all the work. */
12096 if (!bfd_elf_final_link (abfd, info))
12099 /* Process stub sections (eg BE8 encoding, ...). */
12100 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
12102 for (i=0; i<htab->top_id; i++)
12104 sec = htab->stub_group[i].stub_sec;
12105 /* Only process it once, in its link_sec slot. */
12106 if (sec && i == htab->stub_group[i].link_sec->id)
12108 osec = sec->output_section;
12109 elf32_arm_write_section (abfd, info, sec, sec->contents);
12110 if (! bfd_set_section_contents (abfd, osec, sec->contents,
12111 sec->output_offset, sec->size))
12116 /* Write out any glue sections now that we have created all the
12118 if (globals->bfd_of_glue_owner != NULL)
12120 if (! elf32_arm_output_glue_section (info, abfd,
12121 globals->bfd_of_glue_owner,
12122 ARM2THUMB_GLUE_SECTION_NAME))
12125 if (! elf32_arm_output_glue_section (info, abfd,
12126 globals->bfd_of_glue_owner,
12127 THUMB2ARM_GLUE_SECTION_NAME))
12130 if (! elf32_arm_output_glue_section (info, abfd,
12131 globals->bfd_of_glue_owner,
12132 VFP11_ERRATUM_VENEER_SECTION_NAME))
12135 if (! elf32_arm_output_glue_section (info, abfd,
12136 globals->bfd_of_glue_owner,
12137 STM32L4XX_ERRATUM_VENEER_SECTION_NAME))
12140 if (! elf32_arm_output_glue_section (info, abfd,
12141 globals->bfd_of_glue_owner,
12142 ARM_BX_GLUE_SECTION_NAME))
12149 /* Return a best guess for the machine number based on the attributes. */
12151 static unsigned int
12152 bfd_arm_get_mach_from_attributes (bfd * abfd)
12154 int arch = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_CPU_arch);
12158 case TAG_CPU_ARCH_V4: return bfd_mach_arm_4;
12159 case TAG_CPU_ARCH_V4T: return bfd_mach_arm_4T;
12160 case TAG_CPU_ARCH_V5T: return bfd_mach_arm_5T;
12162 case TAG_CPU_ARCH_V5TE:
12166 BFD_ASSERT (Tag_CPU_name < NUM_KNOWN_OBJ_ATTRIBUTES);
12167 name = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_CPU_name].s;
12171 if (strcmp (name, "IWMMXT2") == 0)
12172 return bfd_mach_arm_iWMMXt2;
12174 if (strcmp (name, "IWMMXT") == 0)
12175 return bfd_mach_arm_iWMMXt;
12177 if (strcmp (name, "XSCALE") == 0)
12181 BFD_ASSERT (Tag_WMMX_arch < NUM_KNOWN_OBJ_ATTRIBUTES);
12182 wmmx = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_WMMX_arch].i;
12185 case 1: return bfd_mach_arm_iWMMXt;
12186 case 2: return bfd_mach_arm_iWMMXt2;
12187 default: return bfd_mach_arm_XScale;
12192 return bfd_mach_arm_5TE;
12196 return bfd_mach_arm_unknown;
12200 /* Set the right machine number. */
12203 elf32_arm_object_p (bfd *abfd)
12207 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
12209 if (mach == bfd_mach_arm_unknown)
12211 if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
12212 mach = bfd_mach_arm_ep9312;
12214 mach = bfd_arm_get_mach_from_attributes (abfd);
12217 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
12221 /* Function to keep ARM specific flags in the ELF header. */
12224 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
12226 if (elf_flags_init (abfd)
12227 && elf_elfheader (abfd)->e_flags != flags)
12229 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
12231 if (flags & EF_ARM_INTERWORK)
12232 (*_bfd_error_handler)
12233 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
12237 (_("Warning: Clearing the interworking flag of %B due to outside request"),
12243 elf_elfheader (abfd)->e_flags = flags;
12244 elf_flags_init (abfd) = TRUE;
12250 /* Copy backend specific data from one object module to another. */
12253 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
12256 flagword out_flags;
12258 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
12261 in_flags = elf_elfheader (ibfd)->e_flags;
12262 out_flags = elf_elfheader (obfd)->e_flags;
12264 if (elf_flags_init (obfd)
12265 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
12266 && in_flags != out_flags)
12268 /* Cannot mix APCS26 and APCS32 code. */
12269 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
12272 /* Cannot mix float APCS and non-float APCS code. */
12273 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
12276 /* If the src and dest have different interworking flags
12277 then turn off the interworking bit. */
12278 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
12280 if (out_flags & EF_ARM_INTERWORK)
12282 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
12285 in_flags &= ~EF_ARM_INTERWORK;
12288 /* Likewise for PIC, though don't warn for this case. */
12289 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
12290 in_flags &= ~EF_ARM_PIC;
12293 elf_elfheader (obfd)->e_flags = in_flags;
12294 elf_flags_init (obfd) = TRUE;
12296 return _bfd_elf_copy_private_bfd_data (ibfd, obfd);
12299 /* Values for Tag_ABI_PCS_R9_use. */
12308 /* Values for Tag_ABI_PCS_RW_data. */
12311 AEABI_PCS_RW_data_absolute,
12312 AEABI_PCS_RW_data_PCrel,
12313 AEABI_PCS_RW_data_SBrel,
12314 AEABI_PCS_RW_data_unused
12317 /* Values for Tag_ABI_enum_size. */
12323 AEABI_enum_forced_wide
12326 /* Determine whether an object attribute tag takes an integer, a
12330 elf32_arm_obj_attrs_arg_type (int tag)
12332 if (tag == Tag_compatibility)
12333 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
12334 else if (tag == Tag_nodefaults)
12335 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT;
12336 else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name)
12337 return ATTR_TYPE_FLAG_STR_VAL;
12339 return ATTR_TYPE_FLAG_INT_VAL;
12341 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
12344 /* The ABI defines that Tag_conformance should be emitted first, and that
12345 Tag_nodefaults should be second (if either is defined). This sets those
12346 two positions, and bumps up the position of all the remaining tags to
12349 elf32_arm_obj_attrs_order (int num)
12351 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE)
12352 return Tag_conformance;
12353 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE + 1)
12354 return Tag_nodefaults;
12355 if ((num - 2) < Tag_nodefaults)
12357 if ((num - 1) < Tag_conformance)
12362 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
12364 elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag)
12366 if ((tag & 127) < 64)
12369 (_("%B: Unknown mandatory EABI object attribute %d"),
12371 bfd_set_error (bfd_error_bad_value);
12377 (_("Warning: %B: Unknown EABI object attribute %d"),
12383 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
12384 Returns -1 if no architecture could be read. */
12387 get_secondary_compatible_arch (bfd *abfd)
12389 obj_attribute *attr =
12390 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
12392 /* Note: the tag and its argument below are uleb128 values, though
12393 currently-defined values fit in one byte for each. */
12395 && attr->s[0] == Tag_CPU_arch
12396 && (attr->s[1] & 128) != 128
12397 && attr->s[2] == 0)
12400 /* This tag is "safely ignorable", so don't complain if it looks funny. */
12404 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
12405 The tag is removed if ARCH is -1. */
12408 set_secondary_compatible_arch (bfd *abfd, int arch)
12410 obj_attribute *attr =
12411 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
12419 /* Note: the tag and its argument below are uleb128 values, though
12420 currently-defined values fit in one byte for each. */
12422 attr->s = (char *) bfd_alloc (abfd, 3);
12423 attr->s[0] = Tag_CPU_arch;
12428 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
12432 tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out,
12433 int newtag, int secondary_compat)
12435 #define T(X) TAG_CPU_ARCH_##X
12436 int tagl, tagh, result;
12439 T(V6T2), /* PRE_V4. */
12441 T(V6T2), /* V4T. */
12442 T(V6T2), /* V5T. */
12443 T(V6T2), /* V5TE. */
12444 T(V6T2), /* V5TEJ. */
12447 T(V6T2) /* V6T2. */
12451 T(V6K), /* PRE_V4. */
12455 T(V6K), /* V5TE. */
12456 T(V6K), /* V5TEJ. */
12458 T(V6KZ), /* V6KZ. */
12464 T(V7), /* PRE_V4. */
12469 T(V7), /* V5TEJ. */
12482 T(V6K), /* V5TE. */
12483 T(V6K), /* V5TEJ. */
12485 T(V6KZ), /* V6KZ. */
12489 T(V6_M) /* V6_M. */
12491 const int v6s_m[] =
12497 T(V6K), /* V5TE. */
12498 T(V6K), /* V5TEJ. */
12500 T(V6KZ), /* V6KZ. */
12504 T(V6S_M), /* V6_M. */
12505 T(V6S_M) /* V6S_M. */
12507 const int v7e_m[] =
12511 T(V7E_M), /* V4T. */
12512 T(V7E_M), /* V5T. */
12513 T(V7E_M), /* V5TE. */
12514 T(V7E_M), /* V5TEJ. */
12515 T(V7E_M), /* V6. */
12516 T(V7E_M), /* V6KZ. */
12517 T(V7E_M), /* V6T2. */
12518 T(V7E_M), /* V6K. */
12519 T(V7E_M), /* V7. */
12520 T(V7E_M), /* V6_M. */
12521 T(V7E_M), /* V6S_M. */
12522 T(V7E_M) /* V7E_M. */
12526 T(V8), /* PRE_V4. */
12531 T(V8), /* V5TEJ. */
12538 T(V8), /* V6S_M. */
12539 T(V8), /* V7E_M. */
12542 const int v8m_baseline[] =
12555 T(V8M_BASE), /* V6_M. */
12556 T(V8M_BASE), /* V6S_M. */
12560 T(V8M_BASE) /* V8-M BASELINE. */
12562 const int v8m_mainline[] =
12574 T(V8M_MAIN), /* V7. */
12575 T(V8M_MAIN), /* V6_M. */
12576 T(V8M_MAIN), /* V6S_M. */
12577 T(V8M_MAIN), /* V7E_M. */
12580 T(V8M_MAIN), /* V8-M BASELINE. */
12581 T(V8M_MAIN) /* V8-M MAINLINE. */
12583 const int v4t_plus_v6_m[] =
12589 T(V5TE), /* V5TE. */
12590 T(V5TEJ), /* V5TEJ. */
12592 T(V6KZ), /* V6KZ. */
12593 T(V6T2), /* V6T2. */
12596 T(V6_M), /* V6_M. */
12597 T(V6S_M), /* V6S_M. */
12598 T(V7E_M), /* V7E_M. */
12601 T(V8M_BASE), /* V8-M BASELINE. */
12602 T(V8M_MAIN), /* V8-M MAINLINE. */
12603 T(V4T_PLUS_V6_M) /* V4T plus V6_M. */
12605 const int *comb[] =
12617 /* Pseudo-architecture. */
12621 /* Check we've not got a higher architecture than we know about. */
12623 if (oldtag > MAX_TAG_CPU_ARCH || newtag > MAX_TAG_CPU_ARCH)
12625 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd);
12629 /* Override old tag if we have a Tag_also_compatible_with on the output. */
12631 if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T))
12632 || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M)))
12633 oldtag = T(V4T_PLUS_V6_M);
12635 /* And override the new tag if we have a Tag_also_compatible_with on the
12638 if ((newtag == T(V6_M) && secondary_compat == T(V4T))
12639 || (newtag == T(V4T) && secondary_compat == T(V6_M)))
12640 newtag = T(V4T_PLUS_V6_M);
12642 tagl = (oldtag < newtag) ? oldtag : newtag;
12643 result = tagh = (oldtag > newtag) ? oldtag : newtag;
12645 /* Architectures before V6KZ add features monotonically. */
12646 if (tagh <= TAG_CPU_ARCH_V6KZ)
12649 result = comb[tagh - T(V6T2)] ? comb[tagh - T(V6T2)][tagl] : -1;
12651 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
12652 as the canonical version. */
12653 if (result == T(V4T_PLUS_V6_M))
12656 *secondary_compat_out = T(V6_M);
12659 *secondary_compat_out = -1;
12663 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
12664 ibfd, oldtag, newtag);
12672 /* Query attributes object to see if integer divide instructions may be
12673 present in an object. */
12675 elf32_arm_attributes_accept_div (const obj_attribute *attr)
12677 int arch = attr[Tag_CPU_arch].i;
12678 int profile = attr[Tag_CPU_arch_profile].i;
12680 switch (attr[Tag_DIV_use].i)
12683 /* Integer divide allowed if instruction contained in archetecture. */
12684 if (arch == TAG_CPU_ARCH_V7 && (profile == 'R' || profile == 'M'))
12686 else if (arch >= TAG_CPU_ARCH_V7E_M)
12692 /* Integer divide explicitly prohibited. */
12696 /* Unrecognised case - treat as allowing divide everywhere. */
12698 /* Integer divide allowed in ARM state. */
12703 /* Query attributes object to see if integer divide instructions are
12704 forbidden to be in the object. This is not the inverse of
12705 elf32_arm_attributes_accept_div. */
12707 elf32_arm_attributes_forbid_div (const obj_attribute *attr)
12709 return attr[Tag_DIV_use].i == 1;
12712 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
12713 are conflicting attributes. */
12716 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
12718 obj_attribute *in_attr;
12719 obj_attribute *out_attr;
12720 /* Some tags have 0 = don't care, 1 = strong requirement,
12721 2 = weak requirement. */
12722 static const int order_021[3] = {0, 2, 1};
12724 bfd_boolean result = TRUE;
12725 const char *sec_name = get_elf_backend_data (ibfd)->obj_attrs_section;
12727 /* Skip the linker stubs file. This preserves previous behavior
12728 of accepting unknown attributes in the first input file - but
12730 if (ibfd->flags & BFD_LINKER_CREATED)
12733 /* Skip any input that hasn't attribute section.
12734 This enables to link object files without attribute section with
12736 if (bfd_get_section_by_name (ibfd, sec_name) == NULL)
12739 if (!elf_known_obj_attributes_proc (obfd)[0].i)
12741 /* This is the first object. Copy the attributes. */
12742 _bfd_elf_copy_obj_attributes (ibfd, obfd);
12744 out_attr = elf_known_obj_attributes_proc (obfd);
12746 /* Use the Tag_null value to indicate the attributes have been
12750 /* We do not output objects with Tag_MPextension_use_legacy - we move
12751 the attribute's value to Tag_MPextension_use. */
12752 if (out_attr[Tag_MPextension_use_legacy].i != 0)
12754 if (out_attr[Tag_MPextension_use].i != 0
12755 && out_attr[Tag_MPextension_use_legacy].i
12756 != out_attr[Tag_MPextension_use].i)
12759 (_("Error: %B has both the current and legacy "
12760 "Tag_MPextension_use attributes"), ibfd);
12764 out_attr[Tag_MPextension_use] =
12765 out_attr[Tag_MPextension_use_legacy];
12766 out_attr[Tag_MPextension_use_legacy].type = 0;
12767 out_attr[Tag_MPextension_use_legacy].i = 0;
12773 in_attr = elf_known_obj_attributes_proc (ibfd);
12774 out_attr = elf_known_obj_attributes_proc (obfd);
12775 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
12776 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
12778 /* Ignore mismatches if the object doesn't use floating point or is
12779 floating point ABI independent. */
12780 if (out_attr[Tag_ABI_FP_number_model].i == AEABI_FP_number_model_none
12781 || (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
12782 && out_attr[Tag_ABI_VFP_args].i == AEABI_VFP_args_compatible))
12783 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
12784 else if (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
12785 && in_attr[Tag_ABI_VFP_args].i != AEABI_VFP_args_compatible)
12788 (_("error: %B uses VFP register arguments, %B does not"),
12789 in_attr[Tag_ABI_VFP_args].i ? ibfd : obfd,
12790 in_attr[Tag_ABI_VFP_args].i ? obfd : ibfd);
12795 for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
12797 /* Merge this attribute with existing attributes. */
12800 case Tag_CPU_raw_name:
12802 /* These are merged after Tag_CPU_arch. */
12805 case Tag_ABI_optimization_goals:
12806 case Tag_ABI_FP_optimization_goals:
12807 /* Use the first value seen. */
12812 int secondary_compat = -1, secondary_compat_out = -1;
12813 unsigned int saved_out_attr = out_attr[i].i;
12815 static const char *name_table[] =
12817 /* These aren't real CPU names, but we can't guess
12818 that from the architecture version alone. */
12834 "ARM v8-M.baseline",
12835 "ARM v8-M.mainline",
12838 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
12839 secondary_compat = get_secondary_compatible_arch (ibfd);
12840 secondary_compat_out = get_secondary_compatible_arch (obfd);
12841 arch_attr = tag_cpu_arch_combine (ibfd, out_attr[i].i,
12842 &secondary_compat_out,
12846 /* Return with error if failed to merge. */
12847 if (arch_attr == -1)
12850 out_attr[i].i = arch_attr;
12852 set_secondary_compatible_arch (obfd, secondary_compat_out);
12854 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
12855 if (out_attr[i].i == saved_out_attr)
12856 ; /* Leave the names alone. */
12857 else if (out_attr[i].i == in_attr[i].i)
12859 /* The output architecture has been changed to match the
12860 input architecture. Use the input names. */
12861 out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s
12862 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s)
12864 out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s
12865 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s)
12870 out_attr[Tag_CPU_name].s = NULL;
12871 out_attr[Tag_CPU_raw_name].s = NULL;
12874 /* If we still don't have a value for Tag_CPU_name,
12875 make one up now. Tag_CPU_raw_name remains blank. */
12876 if (out_attr[Tag_CPU_name].s == NULL
12877 && out_attr[i].i < ARRAY_SIZE (name_table))
12878 out_attr[Tag_CPU_name].s =
12879 _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]);
12883 case Tag_ARM_ISA_use:
12884 case Tag_THUMB_ISA_use:
12885 case Tag_WMMX_arch:
12886 case Tag_Advanced_SIMD_arch:
12887 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
12888 case Tag_ABI_FP_rounding:
12889 case Tag_ABI_FP_exceptions:
12890 case Tag_ABI_FP_user_exceptions:
12891 case Tag_ABI_FP_number_model:
12892 case Tag_FP_HP_extension:
12893 case Tag_CPU_unaligned_access:
12895 case Tag_MPextension_use:
12896 /* Use the largest value specified. */
12897 if (in_attr[i].i > out_attr[i].i)
12898 out_attr[i].i = in_attr[i].i;
12901 case Tag_ABI_align_preserved:
12902 case Tag_ABI_PCS_RO_data:
12903 /* Use the smallest value specified. */
12904 if (in_attr[i].i < out_attr[i].i)
12905 out_attr[i].i = in_attr[i].i;
12908 case Tag_ABI_align_needed:
12909 if ((in_attr[i].i > 0 || out_attr[i].i > 0)
12910 && (in_attr[Tag_ABI_align_preserved].i == 0
12911 || out_attr[Tag_ABI_align_preserved].i == 0))
12913 /* This error message should be enabled once all non-conformant
12914 binaries in the toolchain have had the attributes set
12917 (_("error: %B: 8-byte data alignment conflicts with %B"),
12921 /* Fall through. */
12922 case Tag_ABI_FP_denormal:
12923 case Tag_ABI_PCS_GOT_use:
12924 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
12925 value if greater than 2 (for future-proofing). */
12926 if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i)
12927 || (in_attr[i].i <= 2 && out_attr[i].i <= 2
12928 && order_021[in_attr[i].i] > order_021[out_attr[i].i]))
12929 out_attr[i].i = in_attr[i].i;
12932 case Tag_Virtualization_use:
12933 /* The virtualization tag effectively stores two bits of
12934 information: the intended use of TrustZone (in bit 0), and the
12935 intended use of Virtualization (in bit 1). */
12936 if (out_attr[i].i == 0)
12937 out_attr[i].i = in_attr[i].i;
12938 else if (in_attr[i].i != 0
12939 && in_attr[i].i != out_attr[i].i)
12941 if (in_attr[i].i <= 3 && out_attr[i].i <= 3)
12946 (_("error: %B: unable to merge virtualization attributes "
12954 case Tag_CPU_arch_profile:
12955 if (out_attr[i].i != in_attr[i].i)
12957 /* 0 will merge with anything.
12958 'A' and 'S' merge to 'A'.
12959 'R' and 'S' merge to 'R'.
12960 'M' and 'A|R|S' is an error. */
12961 if (out_attr[i].i == 0
12962 || (out_attr[i].i == 'S'
12963 && (in_attr[i].i == 'A' || in_attr[i].i == 'R')))
12964 out_attr[i].i = in_attr[i].i;
12965 else if (in_attr[i].i == 0
12966 || (in_attr[i].i == 'S'
12967 && (out_attr[i].i == 'A' || out_attr[i].i == 'R')))
12968 ; /* Do nothing. */
12972 (_("error: %B: Conflicting architecture profiles %c/%c"),
12974 in_attr[i].i ? in_attr[i].i : '0',
12975 out_attr[i].i ? out_attr[i].i : '0');
12981 case Tag_DSP_extension:
12982 /* No need to change output value if any of:
12983 - pre (<=) ARMv5T input architecture (do not have DSP)
12984 - M input profile not ARMv7E-M and do not have DSP. */
12985 if (in_attr[Tag_CPU_arch].i <= 3
12986 || (in_attr[Tag_CPU_arch_profile].i == 'M'
12987 && in_attr[Tag_CPU_arch].i != 13
12988 && in_attr[i].i == 0))
12989 ; /* Do nothing. */
12990 /* Output value should be 0 if DSP part of architecture, ie.
12991 - post (>=) ARMv5te architecture output
12992 - A, R or S profile output or ARMv7E-M output architecture. */
12993 else if (out_attr[Tag_CPU_arch].i >= 4
12994 && (out_attr[Tag_CPU_arch_profile].i == 'A'
12995 || out_attr[Tag_CPU_arch_profile].i == 'R'
12996 || out_attr[Tag_CPU_arch_profile].i == 'S'
12997 || out_attr[Tag_CPU_arch].i == 13))
12999 /* Otherwise, DSP instructions are added and not part of output
13007 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
13008 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
13009 when it's 0. It might mean absence of FP hardware if
13010 Tag_FP_arch is zero. */
13012 #define VFP_VERSION_COUNT 9
13013 static const struct
13017 } vfp_versions[VFP_VERSION_COUNT] =
13033 /* If the output has no requirement about FP hardware,
13034 follow the requirement of the input. */
13035 if (out_attr[i].i == 0)
13037 BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0);
13038 out_attr[i].i = in_attr[i].i;
13039 out_attr[Tag_ABI_HardFP_use].i
13040 = in_attr[Tag_ABI_HardFP_use].i;
13043 /* If the input has no requirement about FP hardware, do
13045 else if (in_attr[i].i == 0)
13047 BFD_ASSERT (in_attr[Tag_ABI_HardFP_use].i == 0);
13051 /* Both the input and the output have nonzero Tag_FP_arch.
13052 So Tag_ABI_HardFP_use is implied by Tag_FP_arch when it's zero. */
13054 /* If both the input and the output have zero Tag_ABI_HardFP_use,
13056 if (in_attr[Tag_ABI_HardFP_use].i == 0
13057 && out_attr[Tag_ABI_HardFP_use].i == 0)
13059 /* If the input and the output have different Tag_ABI_HardFP_use,
13060 the combination of them is 0 (implied by Tag_FP_arch). */
13061 else if (in_attr[Tag_ABI_HardFP_use].i
13062 != out_attr[Tag_ABI_HardFP_use].i)
13063 out_attr[Tag_ABI_HardFP_use].i = 0;
13065 /* Now we can handle Tag_FP_arch. */
13067 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
13068 pick the biggest. */
13069 if (in_attr[i].i >= VFP_VERSION_COUNT
13070 && in_attr[i].i > out_attr[i].i)
13072 out_attr[i] = in_attr[i];
13075 /* The output uses the superset of input features
13076 (ISA version) and registers. */
13077 ver = vfp_versions[in_attr[i].i].ver;
13078 if (ver < vfp_versions[out_attr[i].i].ver)
13079 ver = vfp_versions[out_attr[i].i].ver;
13080 regs = vfp_versions[in_attr[i].i].regs;
13081 if (regs < vfp_versions[out_attr[i].i].regs)
13082 regs = vfp_versions[out_attr[i].i].regs;
13083 /* This assumes all possible supersets are also a valid
13085 for (newval = VFP_VERSION_COUNT - 1; newval > 0; newval--)
13087 if (regs == vfp_versions[newval].regs
13088 && ver == vfp_versions[newval].ver)
13091 out_attr[i].i = newval;
13094 case Tag_PCS_config:
13095 if (out_attr[i].i == 0)
13096 out_attr[i].i = in_attr[i].i;
13097 else if (in_attr[i].i != 0 && out_attr[i].i != in_attr[i].i)
13099 /* It's sometimes ok to mix different configs, so this is only
13102 (_("Warning: %B: Conflicting platform configuration"), ibfd);
13105 case Tag_ABI_PCS_R9_use:
13106 if (in_attr[i].i != out_attr[i].i
13107 && out_attr[i].i != AEABI_R9_unused
13108 && in_attr[i].i != AEABI_R9_unused)
13111 (_("error: %B: Conflicting use of R9"), ibfd);
13114 if (out_attr[i].i == AEABI_R9_unused)
13115 out_attr[i].i = in_attr[i].i;
13117 case Tag_ABI_PCS_RW_data:
13118 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
13119 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
13120 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
13123 (_("error: %B: SB relative addressing conflicts with use of R9"),
13127 /* Use the smallest value specified. */
13128 if (in_attr[i].i < out_attr[i].i)
13129 out_attr[i].i = in_attr[i].i;
13131 case Tag_ABI_PCS_wchar_t:
13132 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
13133 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
13136 (_("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"),
13137 ibfd, in_attr[i].i, out_attr[i].i);
13139 else if (in_attr[i].i && !out_attr[i].i)
13140 out_attr[i].i = in_attr[i].i;
13142 case Tag_ABI_enum_size:
13143 if (in_attr[i].i != AEABI_enum_unused)
13145 if (out_attr[i].i == AEABI_enum_unused
13146 || out_attr[i].i == AEABI_enum_forced_wide)
13148 /* The existing object is compatible with anything.
13149 Use whatever requirements the new object has. */
13150 out_attr[i].i = in_attr[i].i;
13152 else if (in_attr[i].i != AEABI_enum_forced_wide
13153 && out_attr[i].i != in_attr[i].i
13154 && !elf_arm_tdata (obfd)->no_enum_size_warning)
13156 static const char *aeabi_enum_names[] =
13157 { "", "variable-size", "32-bit", "" };
13158 const char *in_name =
13159 in_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
13160 ? aeabi_enum_names[in_attr[i].i]
13162 const char *out_name =
13163 out_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
13164 ? aeabi_enum_names[out_attr[i].i]
13167 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
13168 ibfd, in_name, out_name);
13172 case Tag_ABI_VFP_args:
13175 case Tag_ABI_WMMX_args:
13176 if (in_attr[i].i != out_attr[i].i)
13179 (_("error: %B uses iWMMXt register arguments, %B does not"),
13184 case Tag_compatibility:
13185 /* Merged in target-independent code. */
13187 case Tag_ABI_HardFP_use:
13188 /* This is handled along with Tag_FP_arch. */
13190 case Tag_ABI_FP_16bit_format:
13191 if (in_attr[i].i != 0 && out_attr[i].i != 0)
13193 if (in_attr[i].i != out_attr[i].i)
13196 (_("error: fp16 format mismatch between %B and %B"),
13201 if (in_attr[i].i != 0)
13202 out_attr[i].i = in_attr[i].i;
13206 /* A value of zero on input means that the divide instruction may
13207 be used if available in the base architecture as specified via
13208 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
13209 the user did not want divide instructions. A value of 2
13210 explicitly means that divide instructions were allowed in ARM
13211 and Thumb state. */
13212 if (in_attr[i].i == out_attr[i].i)
13213 /* Do nothing. */ ;
13214 else if (elf32_arm_attributes_forbid_div (in_attr)
13215 && !elf32_arm_attributes_accept_div (out_attr))
13217 else if (elf32_arm_attributes_forbid_div (out_attr)
13218 && elf32_arm_attributes_accept_div (in_attr))
13219 out_attr[i].i = in_attr[i].i;
13220 else if (in_attr[i].i == 2)
13221 out_attr[i].i = in_attr[i].i;
13224 case Tag_MPextension_use_legacy:
13225 /* We don't output objects with Tag_MPextension_use_legacy - we
13226 move the value to Tag_MPextension_use. */
13227 if (in_attr[i].i != 0 && in_attr[Tag_MPextension_use].i != 0)
13229 if (in_attr[Tag_MPextension_use].i != in_attr[i].i)
13232 (_("%B has has both the current and legacy "
13233 "Tag_MPextension_use attributes"),
13239 if (in_attr[i].i > out_attr[Tag_MPextension_use].i)
13240 out_attr[Tag_MPextension_use] = in_attr[i];
13244 case Tag_nodefaults:
13245 /* This tag is set if it exists, but the value is unused (and is
13246 typically zero). We don't actually need to do anything here -
13247 the merge happens automatically when the type flags are merged
13250 case Tag_also_compatible_with:
13251 /* Already done in Tag_CPU_arch. */
13253 case Tag_conformance:
13254 /* Keep the attribute if it matches. Throw it away otherwise.
13255 No attribute means no claim to conform. */
13256 if (!in_attr[i].s || !out_attr[i].s
13257 || strcmp (in_attr[i].s, out_attr[i].s) != 0)
13258 out_attr[i].s = NULL;
13263 = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
13266 /* If out_attr was copied from in_attr then it won't have a type yet. */
13267 if (in_attr[i].type && !out_attr[i].type)
13268 out_attr[i].type = in_attr[i].type;
13271 /* Merge Tag_compatibility attributes and any common GNU ones. */
13272 if (!_bfd_elf_merge_object_attributes (ibfd, obfd))
13275 /* Check for any attributes not known on ARM. */
13276 result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
13282 /* Return TRUE if the two EABI versions are incompatible. */
13285 elf32_arm_versions_compatible (unsigned iver, unsigned over)
13287 /* v4 and v5 are the same spec before and after it was released,
13288 so allow mixing them. */
13289 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
13290 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
13293 return (iver == over);
13296 /* Merge backend specific data from an object file to the output
13297 object file when linking. */
13300 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd);
13302 /* Display the flags field. */
13305 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
13307 FILE * file = (FILE *) ptr;
13308 unsigned long flags;
13310 BFD_ASSERT (abfd != NULL && ptr != NULL);
13312 /* Print normal ELF private data. */
13313 _bfd_elf_print_private_bfd_data (abfd, ptr);
13315 flags = elf_elfheader (abfd)->e_flags;
13316 /* Ignore init flag - it may not be set, despite the flags field
13317 containing valid data. */
13319 /* xgettext:c-format */
13320 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
13322 switch (EF_ARM_EABI_VERSION (flags))
13324 case EF_ARM_EABI_UNKNOWN:
13325 /* The following flag bits are GNU extensions and not part of the
13326 official ARM ELF extended ABI. Hence they are only decoded if
13327 the EABI version is not set. */
13328 if (flags & EF_ARM_INTERWORK)
13329 fprintf (file, _(" [interworking enabled]"));
13331 if (flags & EF_ARM_APCS_26)
13332 fprintf (file, " [APCS-26]");
13334 fprintf (file, " [APCS-32]");
13336 if (flags & EF_ARM_VFP_FLOAT)
13337 fprintf (file, _(" [VFP float format]"));
13338 else if (flags & EF_ARM_MAVERICK_FLOAT)
13339 fprintf (file, _(" [Maverick float format]"));
13341 fprintf (file, _(" [FPA float format]"));
13343 if (flags & EF_ARM_APCS_FLOAT)
13344 fprintf (file, _(" [floats passed in float registers]"));
13346 if (flags & EF_ARM_PIC)
13347 fprintf (file, _(" [position independent]"));
13349 if (flags & EF_ARM_NEW_ABI)
13350 fprintf (file, _(" [new ABI]"));
13352 if (flags & EF_ARM_OLD_ABI)
13353 fprintf (file, _(" [old ABI]"));
13355 if (flags & EF_ARM_SOFT_FLOAT)
13356 fprintf (file, _(" [software FP]"));
13358 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
13359 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
13360 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
13361 | EF_ARM_MAVERICK_FLOAT);
13364 case EF_ARM_EABI_VER1:
13365 fprintf (file, _(" [Version1 EABI]"));
13367 if (flags & EF_ARM_SYMSARESORTED)
13368 fprintf (file, _(" [sorted symbol table]"));
13370 fprintf (file, _(" [unsorted symbol table]"));
13372 flags &= ~ EF_ARM_SYMSARESORTED;
13375 case EF_ARM_EABI_VER2:
13376 fprintf (file, _(" [Version2 EABI]"));
13378 if (flags & EF_ARM_SYMSARESORTED)
13379 fprintf (file, _(" [sorted symbol table]"));
13381 fprintf (file, _(" [unsorted symbol table]"));
13383 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
13384 fprintf (file, _(" [dynamic symbols use segment index]"));
13386 if (flags & EF_ARM_MAPSYMSFIRST)
13387 fprintf (file, _(" [mapping symbols precede others]"));
13389 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
13390 | EF_ARM_MAPSYMSFIRST);
13393 case EF_ARM_EABI_VER3:
13394 fprintf (file, _(" [Version3 EABI]"));
13397 case EF_ARM_EABI_VER4:
13398 fprintf (file, _(" [Version4 EABI]"));
13401 case EF_ARM_EABI_VER5:
13402 fprintf (file, _(" [Version5 EABI]"));
13404 if (flags & EF_ARM_ABI_FLOAT_SOFT)
13405 fprintf (file, _(" [soft-float ABI]"));
13407 if (flags & EF_ARM_ABI_FLOAT_HARD)
13408 fprintf (file, _(" [hard-float ABI]"));
13410 flags &= ~(EF_ARM_ABI_FLOAT_SOFT | EF_ARM_ABI_FLOAT_HARD);
13413 if (flags & EF_ARM_BE8)
13414 fprintf (file, _(" [BE8]"));
13416 if (flags & EF_ARM_LE8)
13417 fprintf (file, _(" [LE8]"));
13419 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
13423 fprintf (file, _(" <EABI version unrecognised>"));
13427 flags &= ~ EF_ARM_EABIMASK;
13429 if (flags & EF_ARM_RELEXEC)
13430 fprintf (file, _(" [relocatable executable]"));
13432 flags &= ~EF_ARM_RELEXEC;
13435 fprintf (file, _("<Unrecognised flag bits set>"));
13437 fputc ('\n', file);
13443 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
13445 switch (ELF_ST_TYPE (elf_sym->st_info))
13447 case STT_ARM_TFUNC:
13448 return ELF_ST_TYPE (elf_sym->st_info);
13450 case STT_ARM_16BIT:
13451 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
13452 This allows us to distinguish between data used by Thumb instructions
13453 and non-data (which is probably code) inside Thumb regions of an
13455 if (type != STT_OBJECT && type != STT_TLS)
13456 return ELF_ST_TYPE (elf_sym->st_info);
13467 elf32_arm_gc_mark_hook (asection *sec,
13468 struct bfd_link_info *info,
13469 Elf_Internal_Rela *rel,
13470 struct elf_link_hash_entry *h,
13471 Elf_Internal_Sym *sym)
13474 switch (ELF32_R_TYPE (rel->r_info))
13476 case R_ARM_GNU_VTINHERIT:
13477 case R_ARM_GNU_VTENTRY:
13481 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
13484 /* Update the got entry reference counts for the section being removed. */
13487 elf32_arm_gc_sweep_hook (bfd * abfd,
13488 struct bfd_link_info * info,
13490 const Elf_Internal_Rela * relocs)
13492 Elf_Internal_Shdr *symtab_hdr;
13493 struct elf_link_hash_entry **sym_hashes;
13494 bfd_signed_vma *local_got_refcounts;
13495 const Elf_Internal_Rela *rel, *relend;
13496 struct elf32_arm_link_hash_table * globals;
13498 if (bfd_link_relocatable (info))
13501 globals = elf32_arm_hash_table (info);
13502 if (globals == NULL)
13505 elf_section_data (sec)->local_dynrel = NULL;
13507 symtab_hdr = & elf_symtab_hdr (abfd);
13508 sym_hashes = elf_sym_hashes (abfd);
13509 local_got_refcounts = elf_local_got_refcounts (abfd);
13511 check_use_blx (globals);
13513 relend = relocs + sec->reloc_count;
13514 for (rel = relocs; rel < relend; rel++)
13516 unsigned long r_symndx;
13517 struct elf_link_hash_entry *h = NULL;
13518 struct elf32_arm_link_hash_entry *eh;
13520 bfd_boolean call_reloc_p;
13521 bfd_boolean may_become_dynamic_p;
13522 bfd_boolean may_need_local_target_p;
13523 union gotplt_union *root_plt;
13524 struct arm_plt_info *arm_plt;
13526 r_symndx = ELF32_R_SYM (rel->r_info);
13527 if (r_symndx >= symtab_hdr->sh_info)
13529 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
13530 while (h->root.type == bfd_link_hash_indirect
13531 || h->root.type == bfd_link_hash_warning)
13532 h = (struct elf_link_hash_entry *) h->root.u.i.link;
13534 eh = (struct elf32_arm_link_hash_entry *) h;
13536 call_reloc_p = FALSE;
13537 may_become_dynamic_p = FALSE;
13538 may_need_local_target_p = FALSE;
13540 r_type = ELF32_R_TYPE (rel->r_info);
13541 r_type = arm_real_reloc_type (globals, r_type);
13545 case R_ARM_GOT_PREL:
13546 case R_ARM_TLS_GD32:
13547 case R_ARM_TLS_IE32:
13550 if (h->got.refcount > 0)
13551 h->got.refcount -= 1;
13553 else if (local_got_refcounts != NULL)
13555 if (local_got_refcounts[r_symndx] > 0)
13556 local_got_refcounts[r_symndx] -= 1;
13560 case R_ARM_TLS_LDM32:
13561 globals->tls_ldm_got.refcount -= 1;
13569 case R_ARM_THM_CALL:
13570 case R_ARM_THM_JUMP24:
13571 case R_ARM_THM_JUMP19:
13572 call_reloc_p = TRUE;
13573 may_need_local_target_p = TRUE;
13577 if (!globals->vxworks_p)
13579 may_need_local_target_p = TRUE;
13582 /* Fall through. */
13584 case R_ARM_ABS32_NOI:
13586 case R_ARM_REL32_NOI:
13587 case R_ARM_MOVW_ABS_NC:
13588 case R_ARM_MOVT_ABS:
13589 case R_ARM_MOVW_PREL_NC:
13590 case R_ARM_MOVT_PREL:
13591 case R_ARM_THM_MOVW_ABS_NC:
13592 case R_ARM_THM_MOVT_ABS:
13593 case R_ARM_THM_MOVW_PREL_NC:
13594 case R_ARM_THM_MOVT_PREL:
13595 /* Should the interworking branches be here also? */
13596 if ((bfd_link_pic (info) || globals->root.is_relocatable_executable)
13597 && (sec->flags & SEC_ALLOC) != 0)
13600 && elf32_arm_howto_from_type (r_type)->pc_relative)
13602 call_reloc_p = TRUE;
13603 may_need_local_target_p = TRUE;
13606 may_become_dynamic_p = TRUE;
13609 may_need_local_target_p = TRUE;
13616 if (may_need_local_target_p
13617 && elf32_arm_get_plt_info (abfd, eh, r_symndx, &root_plt, &arm_plt))
13619 /* If PLT refcount book-keeping is wrong and too low, we'll
13620 see a zero value (going to -1) for the root PLT reference
13622 if (root_plt->refcount >= 0)
13624 BFD_ASSERT (root_plt->refcount != 0);
13625 root_plt->refcount -= 1;
13628 /* A value of -1 means the symbol has become local, forced
13629 or seeing a hidden definition. Any other negative value
13631 BFD_ASSERT (root_plt->refcount == -1);
13634 arm_plt->noncall_refcount--;
13636 if (r_type == R_ARM_THM_CALL)
13637 arm_plt->maybe_thumb_refcount--;
13639 if (r_type == R_ARM_THM_JUMP24
13640 || r_type == R_ARM_THM_JUMP19)
13641 arm_plt->thumb_refcount--;
13644 if (may_become_dynamic_p)
13646 struct elf_dyn_relocs **pp;
13647 struct elf_dyn_relocs *p;
13650 pp = &(eh->dyn_relocs);
13653 Elf_Internal_Sym *isym;
13655 isym = bfd_sym_from_r_symndx (&globals->sym_cache,
13659 pp = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
13663 for (; (p = *pp) != NULL; pp = &p->next)
13666 /* Everything must go for SEC. */
13676 /* Look through the relocs for a section during the first phase. */
13679 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
13680 asection *sec, const Elf_Internal_Rela *relocs)
13682 Elf_Internal_Shdr *symtab_hdr;
13683 struct elf_link_hash_entry **sym_hashes;
13684 const Elf_Internal_Rela *rel;
13685 const Elf_Internal_Rela *rel_end;
13688 struct elf32_arm_link_hash_table *htab;
13689 bfd_boolean call_reloc_p;
13690 bfd_boolean may_become_dynamic_p;
13691 bfd_boolean may_need_local_target_p;
13692 unsigned long nsyms;
13694 if (bfd_link_relocatable (info))
13697 BFD_ASSERT (is_arm_elf (abfd));
13699 htab = elf32_arm_hash_table (info);
13705 /* Create dynamic sections for relocatable executables so that we can
13706 copy relocations. */
13707 if (htab->root.is_relocatable_executable
13708 && ! htab->root.dynamic_sections_created)
13710 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
13714 if (htab->root.dynobj == NULL)
13715 htab->root.dynobj = abfd;
13716 if (!create_ifunc_sections (info))
13719 dynobj = htab->root.dynobj;
13721 symtab_hdr = & elf_symtab_hdr (abfd);
13722 sym_hashes = elf_sym_hashes (abfd);
13723 nsyms = NUM_SHDR_ENTRIES (symtab_hdr);
13725 rel_end = relocs + sec->reloc_count;
13726 for (rel = relocs; rel < rel_end; rel++)
13728 Elf_Internal_Sym *isym;
13729 struct elf_link_hash_entry *h;
13730 struct elf32_arm_link_hash_entry *eh;
13731 unsigned long r_symndx;
13734 r_symndx = ELF32_R_SYM (rel->r_info);
13735 r_type = ELF32_R_TYPE (rel->r_info);
13736 r_type = arm_real_reloc_type (htab, r_type);
13738 if (r_symndx >= nsyms
13739 /* PR 9934: It is possible to have relocations that do not
13740 refer to symbols, thus it is also possible to have an
13741 object file containing relocations but no symbol table. */
13742 && (r_symndx > STN_UNDEF || nsyms > 0))
13744 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
13753 if (r_symndx < symtab_hdr->sh_info)
13755 /* A local symbol. */
13756 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
13763 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
13764 while (h->root.type == bfd_link_hash_indirect
13765 || h->root.type == bfd_link_hash_warning)
13766 h = (struct elf_link_hash_entry *) h->root.u.i.link;
13768 /* PR15323, ref flags aren't set for references in the
13770 h->root.non_ir_ref = 1;
13774 eh = (struct elf32_arm_link_hash_entry *) h;
13776 call_reloc_p = FALSE;
13777 may_become_dynamic_p = FALSE;
13778 may_need_local_target_p = FALSE;
13780 /* Could be done earlier, if h were already available. */
13781 r_type = elf32_arm_tls_transition (info, r_type, h);
13785 case R_ARM_GOT_PREL:
13786 case R_ARM_TLS_GD32:
13787 case R_ARM_TLS_IE32:
13788 case R_ARM_TLS_GOTDESC:
13789 case R_ARM_TLS_DESCSEQ:
13790 case R_ARM_THM_TLS_DESCSEQ:
13791 case R_ARM_TLS_CALL:
13792 case R_ARM_THM_TLS_CALL:
13793 /* This symbol requires a global offset table entry. */
13795 int tls_type, old_tls_type;
13799 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
13801 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
13803 case R_ARM_TLS_GOTDESC:
13804 case R_ARM_TLS_CALL: case R_ARM_THM_TLS_CALL:
13805 case R_ARM_TLS_DESCSEQ: case R_ARM_THM_TLS_DESCSEQ:
13806 tls_type = GOT_TLS_GDESC; break;
13808 default: tls_type = GOT_NORMAL; break;
13811 if (!bfd_link_executable (info) && (tls_type & GOT_TLS_IE))
13812 info->flags |= DF_STATIC_TLS;
13817 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
13821 /* This is a global offset table entry for a local symbol. */
13822 if (!elf32_arm_allocate_local_sym_info (abfd))
13824 elf_local_got_refcounts (abfd)[r_symndx] += 1;
13825 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
13828 /* If a variable is accessed with both tls methods, two
13829 slots may be created. */
13830 if (GOT_TLS_GD_ANY_P (old_tls_type)
13831 && GOT_TLS_GD_ANY_P (tls_type))
13832 tls_type |= old_tls_type;
13834 /* We will already have issued an error message if there
13835 is a TLS/non-TLS mismatch, based on the symbol
13836 type. So just combine any TLS types needed. */
13837 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
13838 && tls_type != GOT_NORMAL)
13839 tls_type |= old_tls_type;
13841 /* If the symbol is accessed in both IE and GDESC
13842 method, we're able to relax. Turn off the GDESC flag,
13843 without messing up with any other kind of tls types
13844 that may be involved. */
13845 if ((tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GDESC))
13846 tls_type &= ~GOT_TLS_GDESC;
13848 if (old_tls_type != tls_type)
13851 elf32_arm_hash_entry (h)->tls_type = tls_type;
13853 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
13856 /* Fall through. */
13858 case R_ARM_TLS_LDM32:
13859 if (r_type == R_ARM_TLS_LDM32)
13860 htab->tls_ldm_got.refcount++;
13861 /* Fall through. */
13863 case R_ARM_GOTOFF32:
13865 if (htab->root.sgot == NULL
13866 && !create_got_section (htab->root.dynobj, info))
13875 case R_ARM_THM_CALL:
13876 case R_ARM_THM_JUMP24:
13877 case R_ARM_THM_JUMP19:
13878 call_reloc_p = TRUE;
13879 may_need_local_target_p = TRUE;
13883 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
13884 ldr __GOTT_INDEX__ offsets. */
13885 if (!htab->vxworks_p)
13887 may_need_local_target_p = TRUE;
13890 else goto jump_over;
13892 /* Fall through. */
13894 case R_ARM_MOVW_ABS_NC:
13895 case R_ARM_MOVT_ABS:
13896 case R_ARM_THM_MOVW_ABS_NC:
13897 case R_ARM_THM_MOVT_ABS:
13898 if (bfd_link_pic (info))
13900 (*_bfd_error_handler)
13901 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
13902 abfd, elf32_arm_howto_table_1[r_type].name,
13903 (h) ? h->root.root.string : "a local symbol");
13904 bfd_set_error (bfd_error_bad_value);
13908 /* Fall through. */
13910 case R_ARM_ABS32_NOI:
13912 if (h != NULL && bfd_link_executable (info))
13914 h->pointer_equality_needed = 1;
13916 /* Fall through. */
13918 case R_ARM_REL32_NOI:
13919 case R_ARM_MOVW_PREL_NC:
13920 case R_ARM_MOVT_PREL:
13921 case R_ARM_THM_MOVW_PREL_NC:
13922 case R_ARM_THM_MOVT_PREL:
13924 /* Should the interworking branches be listed here? */
13925 if ((bfd_link_pic (info) || htab->root.is_relocatable_executable)
13926 && (sec->flags & SEC_ALLOC) != 0)
13929 && elf32_arm_howto_from_type (r_type)->pc_relative)
13931 /* In shared libraries and relocatable executables,
13932 we treat local relative references as calls;
13933 see the related SYMBOL_CALLS_LOCAL code in
13934 allocate_dynrelocs. */
13935 call_reloc_p = TRUE;
13936 may_need_local_target_p = TRUE;
13939 /* We are creating a shared library or relocatable
13940 executable, and this is a reloc against a global symbol,
13941 or a non-PC-relative reloc against a local symbol.
13942 We may need to copy the reloc into the output. */
13943 may_become_dynamic_p = TRUE;
13946 may_need_local_target_p = TRUE;
13949 /* This relocation describes the C++ object vtable hierarchy.
13950 Reconstruct it for later use during GC. */
13951 case R_ARM_GNU_VTINHERIT:
13952 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
13956 /* This relocation describes which C++ vtable entries are actually
13957 used. Record for later use during GC. */
13958 case R_ARM_GNU_VTENTRY:
13959 BFD_ASSERT (h != NULL);
13961 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
13969 /* We may need a .plt entry if the function this reloc
13970 refers to is in a different object, regardless of the
13971 symbol's type. We can't tell for sure yet, because
13972 something later might force the symbol local. */
13974 else if (may_need_local_target_p)
13975 /* If this reloc is in a read-only section, we might
13976 need a copy reloc. We can't check reliably at this
13977 stage whether the section is read-only, as input
13978 sections have not yet been mapped to output sections.
13979 Tentatively set the flag for now, and correct in
13980 adjust_dynamic_symbol. */
13981 h->non_got_ref = 1;
13984 if (may_need_local_target_p
13985 && (h != NULL || ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC))
13987 union gotplt_union *root_plt;
13988 struct arm_plt_info *arm_plt;
13989 struct arm_local_iplt_info *local_iplt;
13993 root_plt = &h->plt;
13994 arm_plt = &eh->plt;
13998 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
13999 if (local_iplt == NULL)
14001 root_plt = &local_iplt->root;
14002 arm_plt = &local_iplt->arm;
14005 /* If the symbol is a function that doesn't bind locally,
14006 this relocation will need a PLT entry. */
14007 if (root_plt->refcount != -1)
14008 root_plt->refcount += 1;
14011 arm_plt->noncall_refcount++;
14013 /* It's too early to use htab->use_blx here, so we have to
14014 record possible blx references separately from
14015 relocs that definitely need a thumb stub. */
14017 if (r_type == R_ARM_THM_CALL)
14018 arm_plt->maybe_thumb_refcount += 1;
14020 if (r_type == R_ARM_THM_JUMP24
14021 || r_type == R_ARM_THM_JUMP19)
14022 arm_plt->thumb_refcount += 1;
14025 if (may_become_dynamic_p)
14027 struct elf_dyn_relocs *p, **head;
14029 /* Create a reloc section in dynobj. */
14030 if (sreloc == NULL)
14032 sreloc = _bfd_elf_make_dynamic_reloc_section
14033 (sec, dynobj, 2, abfd, ! htab->use_rel);
14035 if (sreloc == NULL)
14038 /* BPABI objects never have dynamic relocations mapped. */
14039 if (htab->symbian_p)
14043 flags = bfd_get_section_flags (dynobj, sreloc);
14044 flags &= ~(SEC_LOAD | SEC_ALLOC);
14045 bfd_set_section_flags (dynobj, sreloc, flags);
14049 /* If this is a global symbol, count the number of
14050 relocations we need for this symbol. */
14052 head = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs;
14055 head = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
14061 if (p == NULL || p->sec != sec)
14063 bfd_size_type amt = sizeof *p;
14065 p = (struct elf_dyn_relocs *) bfd_alloc (htab->root.dynobj, amt);
14075 if (elf32_arm_howto_from_type (r_type)->pc_relative)
14084 /* Unwinding tables are not referenced directly. This pass marks them as
14085 required if the corresponding code section is marked. */
14088 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
14089 elf_gc_mark_hook_fn gc_mark_hook)
14092 Elf_Internal_Shdr **elf_shdrp;
14095 _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook);
14097 /* Marking EH data may cause additional code sections to be marked,
14098 requiring multiple passes. */
14103 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
14107 if (! is_arm_elf (sub))
14110 elf_shdrp = elf_elfsections (sub);
14111 for (o = sub->sections; o != NULL; o = o->next)
14113 Elf_Internal_Shdr *hdr;
14115 hdr = &elf_section_data (o)->this_hdr;
14116 if (hdr->sh_type == SHT_ARM_EXIDX
14118 && hdr->sh_link < elf_numsections (sub)
14120 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
14123 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
14133 /* Treat mapping symbols as special target symbols. */
14136 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
14138 return bfd_is_arm_special_symbol_name (sym->name,
14139 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
14142 /* This is a copy of elf_find_function() from elf.c except that
14143 ARM mapping symbols are ignored when looking for function names
14144 and STT_ARM_TFUNC is considered to a function type. */
14147 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
14148 asymbol ** symbols,
14149 asection * section,
14151 const char ** filename_ptr,
14152 const char ** functionname_ptr)
14154 const char * filename = NULL;
14155 asymbol * func = NULL;
14156 bfd_vma low_func = 0;
14159 for (p = symbols; *p != NULL; p++)
14161 elf_symbol_type *q;
14163 q = (elf_symbol_type *) *p;
14165 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
14170 filename = bfd_asymbol_name (&q->symbol);
14173 case STT_ARM_TFUNC:
14175 /* Skip mapping symbols. */
14176 if ((q->symbol.flags & BSF_LOCAL)
14177 && bfd_is_arm_special_symbol_name (q->symbol.name,
14178 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
14180 /* Fall through. */
14181 if (bfd_get_section (&q->symbol) == section
14182 && q->symbol.value >= low_func
14183 && q->symbol.value <= offset)
14185 func = (asymbol *) q;
14186 low_func = q->symbol.value;
14196 *filename_ptr = filename;
14197 if (functionname_ptr)
14198 *functionname_ptr = bfd_asymbol_name (func);
14204 /* Find the nearest line to a particular section and offset, for error
14205 reporting. This code is a duplicate of the code in elf.c, except
14206 that it uses arm_elf_find_function. */
14209 elf32_arm_find_nearest_line (bfd * abfd,
14210 asymbol ** symbols,
14211 asection * section,
14213 const char ** filename_ptr,
14214 const char ** functionname_ptr,
14215 unsigned int * line_ptr,
14216 unsigned int * discriminator_ptr)
14218 bfd_boolean found = FALSE;
14220 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
14221 filename_ptr, functionname_ptr,
14222 line_ptr, discriminator_ptr,
14223 dwarf_debug_sections, 0,
14224 & elf_tdata (abfd)->dwarf2_find_line_info))
14226 if (!*functionname_ptr)
14227 arm_elf_find_function (abfd, symbols, section, offset,
14228 *filename_ptr ? NULL : filename_ptr,
14234 /* Skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain
14237 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
14238 & found, filename_ptr,
14239 functionname_ptr, line_ptr,
14240 & elf_tdata (abfd)->line_info))
14243 if (found && (*functionname_ptr || *line_ptr))
14246 if (symbols == NULL)
14249 if (! arm_elf_find_function (abfd, symbols, section, offset,
14250 filename_ptr, functionname_ptr))
14258 elf32_arm_find_inliner_info (bfd * abfd,
14259 const char ** filename_ptr,
14260 const char ** functionname_ptr,
14261 unsigned int * line_ptr)
14264 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
14265 functionname_ptr, line_ptr,
14266 & elf_tdata (abfd)->dwarf2_find_line_info);
14270 /* Adjust a symbol defined by a dynamic object and referenced by a
14271 regular object. The current definition is in some section of the
14272 dynamic object, but we're not including those sections. We have to
14273 change the definition to something the rest of the link can
14277 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
14278 struct elf_link_hash_entry * h)
14282 struct elf32_arm_link_hash_entry * eh;
14283 struct elf32_arm_link_hash_table *globals;
14285 globals = elf32_arm_hash_table (info);
14286 if (globals == NULL)
14289 dynobj = elf_hash_table (info)->dynobj;
14291 /* Make sure we know what is going on here. */
14292 BFD_ASSERT (dynobj != NULL
14294 || h->type == STT_GNU_IFUNC
14295 || h->u.weakdef != NULL
14298 && !h->def_regular)));
14300 eh = (struct elf32_arm_link_hash_entry *) h;
14302 /* If this is a function, put it in the procedure linkage table. We
14303 will fill in the contents of the procedure linkage table later,
14304 when we know the address of the .got section. */
14305 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
14307 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
14308 symbol binds locally. */
14309 if (h->plt.refcount <= 0
14310 || (h->type != STT_GNU_IFUNC
14311 && (SYMBOL_CALLS_LOCAL (info, h)
14312 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
14313 && h->root.type == bfd_link_hash_undefweak))))
14315 /* This case can occur if we saw a PLT32 reloc in an input
14316 file, but the symbol was never referred to by a dynamic
14317 object, or if all references were garbage collected. In
14318 such a case, we don't actually need to build a procedure
14319 linkage table, and we can just do a PC24 reloc instead. */
14320 h->plt.offset = (bfd_vma) -1;
14321 eh->plt.thumb_refcount = 0;
14322 eh->plt.maybe_thumb_refcount = 0;
14323 eh->plt.noncall_refcount = 0;
14331 /* It's possible that we incorrectly decided a .plt reloc was
14332 needed for an R_ARM_PC24 or similar reloc to a non-function sym
14333 in check_relocs. We can't decide accurately between function
14334 and non-function syms in check-relocs; Objects loaded later in
14335 the link may change h->type. So fix it now. */
14336 h->plt.offset = (bfd_vma) -1;
14337 eh->plt.thumb_refcount = 0;
14338 eh->plt.maybe_thumb_refcount = 0;
14339 eh->plt.noncall_refcount = 0;
14342 /* If this is a weak symbol, and there is a real definition, the
14343 processor independent code will have arranged for us to see the
14344 real definition first, and we can just use the same value. */
14345 if (h->u.weakdef != NULL)
14347 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
14348 || h->u.weakdef->root.type == bfd_link_hash_defweak);
14349 h->root.u.def.section = h->u.weakdef->root.u.def.section;
14350 h->root.u.def.value = h->u.weakdef->root.u.def.value;
14354 /* If there are no non-GOT references, we do not need a copy
14356 if (!h->non_got_ref)
14359 /* This is a reference to a symbol defined by a dynamic object which
14360 is not a function. */
14362 /* If we are creating a shared library, we must presume that the
14363 only references to the symbol are via the global offset table.
14364 For such cases we need not do anything here; the relocations will
14365 be handled correctly by relocate_section. Relocatable executables
14366 can reference data in shared objects directly, so we don't need to
14367 do anything here. */
14368 if (bfd_link_pic (info) || globals->root.is_relocatable_executable)
14371 /* We must allocate the symbol in our .dynbss section, which will
14372 become part of the .bss section of the executable. There will be
14373 an entry for this symbol in the .dynsym section. The dynamic
14374 object will contain position independent code, so all references
14375 from the dynamic object to this symbol will go through the global
14376 offset table. The dynamic linker will use the .dynsym entry to
14377 determine the address it must put in the global offset table, so
14378 both the dynamic object and the regular object will refer to the
14379 same memory location for the variable. */
14380 s = bfd_get_linker_section (dynobj, ".dynbss");
14381 BFD_ASSERT (s != NULL);
14383 /* If allowed, we must generate a R_ARM_COPY reloc to tell the dynamic
14384 linker to copy the initial value out of the dynamic object and into
14385 the runtime process image. We need to remember the offset into the
14386 .rel(a).bss section we are going to use. */
14387 if (info->nocopyreloc == 0
14388 && (h->root.u.def.section->flags & SEC_ALLOC) != 0
14393 srel = bfd_get_linker_section (dynobj, RELOC_SECTION (globals, ".bss"));
14394 elf32_arm_allocate_dynrelocs (info, srel, 1);
14398 return _bfd_elf_adjust_dynamic_copy (info, h, s);
14401 /* Allocate space in .plt, .got and associated reloc sections for
14405 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf)
14407 struct bfd_link_info *info;
14408 struct elf32_arm_link_hash_table *htab;
14409 struct elf32_arm_link_hash_entry *eh;
14410 struct elf_dyn_relocs *p;
14412 if (h->root.type == bfd_link_hash_indirect)
14415 eh = (struct elf32_arm_link_hash_entry *) h;
14417 info = (struct bfd_link_info *) inf;
14418 htab = elf32_arm_hash_table (info);
14422 if ((htab->root.dynamic_sections_created || h->type == STT_GNU_IFUNC)
14423 && h->plt.refcount > 0)
14425 /* Make sure this symbol is output as a dynamic symbol.
14426 Undefined weak syms won't yet be marked as dynamic. */
14427 if (h->dynindx == -1
14428 && !h->forced_local)
14430 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14434 /* If the call in the PLT entry binds locally, the associated
14435 GOT entry should use an R_ARM_IRELATIVE relocation instead of
14436 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
14437 than the .plt section. */
14438 if (h->type == STT_GNU_IFUNC && SYMBOL_CALLS_LOCAL (info, h))
14441 if (eh->plt.noncall_refcount == 0
14442 && SYMBOL_REFERENCES_LOCAL (info, h))
14443 /* All non-call references can be resolved directly.
14444 This means that they can (and in some cases, must)
14445 resolve directly to the run-time target, rather than
14446 to the PLT. That in turns means that any .got entry
14447 would be equal to the .igot.plt entry, so there's
14448 no point having both. */
14449 h->got.refcount = 0;
14452 if (bfd_link_pic (info)
14454 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
14456 elf32_arm_allocate_plt_entry (info, eh->is_iplt, &h->plt, &eh->plt);
14458 /* If this symbol is not defined in a regular file, and we are
14459 not generating a shared library, then set the symbol to this
14460 location in the .plt. This is required to make function
14461 pointers compare as equal between the normal executable and
14462 the shared library. */
14463 if (! bfd_link_pic (info)
14464 && !h->def_regular)
14466 h->root.u.def.section = htab->root.splt;
14467 h->root.u.def.value = h->plt.offset;
14469 /* Make sure the function is not marked as Thumb, in case
14470 it is the target of an ABS32 relocation, which will
14471 point to the PLT entry. */
14472 ARM_SET_SYM_BRANCH_TYPE (h->target_internal, ST_BRANCH_TO_ARM);
14475 /* VxWorks executables have a second set of relocations for
14476 each PLT entry. They go in a separate relocation section,
14477 which is processed by the kernel loader. */
14478 if (htab->vxworks_p && !bfd_link_pic (info))
14480 /* There is a relocation for the initial PLT entry:
14481 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
14482 if (h->plt.offset == htab->plt_header_size)
14483 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 1);
14485 /* There are two extra relocations for each subsequent
14486 PLT entry: an R_ARM_32 relocation for the GOT entry,
14487 and an R_ARM_32 relocation for the PLT entry. */
14488 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 2);
14493 h->plt.offset = (bfd_vma) -1;
14499 h->plt.offset = (bfd_vma) -1;
14503 eh = (struct elf32_arm_link_hash_entry *) h;
14504 eh->tlsdesc_got = (bfd_vma) -1;
14506 if (h->got.refcount > 0)
14510 int tls_type = elf32_arm_hash_entry (h)->tls_type;
14513 /* Make sure this symbol is output as a dynamic symbol.
14514 Undefined weak syms won't yet be marked as dynamic. */
14515 if (h->dynindx == -1
14516 && !h->forced_local)
14518 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14522 if (!htab->symbian_p)
14524 s = htab->root.sgot;
14525 h->got.offset = s->size;
14527 if (tls_type == GOT_UNKNOWN)
14530 if (tls_type == GOT_NORMAL)
14531 /* Non-TLS symbols need one GOT slot. */
14535 if (tls_type & GOT_TLS_GDESC)
14537 /* R_ARM_TLS_DESC needs 2 GOT slots. */
14539 = (htab->root.sgotplt->size
14540 - elf32_arm_compute_jump_table_size (htab));
14541 htab->root.sgotplt->size += 8;
14542 h->got.offset = (bfd_vma) -2;
14543 /* plt.got_offset needs to know there's a TLS_DESC
14544 reloc in the middle of .got.plt. */
14545 htab->num_tls_desc++;
14548 if (tls_type & GOT_TLS_GD)
14550 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
14551 the symbol is both GD and GDESC, got.offset may
14552 have been overwritten. */
14553 h->got.offset = s->size;
14557 if (tls_type & GOT_TLS_IE)
14558 /* R_ARM_TLS_IE32 needs one GOT slot. */
14562 dyn = htab->root.dynamic_sections_created;
14565 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
14566 bfd_link_pic (info),
14568 && (!bfd_link_pic (info)
14569 || !SYMBOL_REFERENCES_LOCAL (info, h)))
14572 if (tls_type != GOT_NORMAL
14573 && (bfd_link_pic (info) || indx != 0)
14574 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
14575 || h->root.type != bfd_link_hash_undefweak))
14577 if (tls_type & GOT_TLS_IE)
14578 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14580 if (tls_type & GOT_TLS_GD)
14581 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14583 if (tls_type & GOT_TLS_GDESC)
14585 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
14586 /* GDESC needs a trampoline to jump to. */
14587 htab->tls_trampoline = -1;
14590 /* Only GD needs it. GDESC just emits one relocation per
14592 if ((tls_type & GOT_TLS_GD) && indx != 0)
14593 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14595 else if (indx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))
14597 if (htab->root.dynamic_sections_created)
14598 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
14599 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14601 else if (h->type == STT_GNU_IFUNC
14602 && eh->plt.noncall_refcount == 0)
14603 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
14604 they all resolve dynamically instead. Reserve room for the
14605 GOT entry's R_ARM_IRELATIVE relocation. */
14606 elf32_arm_allocate_irelocs (info, htab->root.srelgot, 1);
14607 else if (bfd_link_pic (info)
14608 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
14609 || h->root.type != bfd_link_hash_undefweak))
14610 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
14611 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14615 h->got.offset = (bfd_vma) -1;
14617 /* Allocate stubs for exported Thumb functions on v4t. */
14618 if (!htab->use_blx && h->dynindx != -1
14620 && ARM_GET_SYM_BRANCH_TYPE (h->target_internal) == ST_BRANCH_TO_THUMB
14621 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
14623 struct elf_link_hash_entry * th;
14624 struct bfd_link_hash_entry * bh;
14625 struct elf_link_hash_entry * myh;
14629 /* Create a new symbol to regist the real location of the function. */
14630 s = h->root.u.def.section;
14631 sprintf (name, "__real_%s", h->root.root.string);
14632 _bfd_generic_link_add_one_symbol (info, s->owner,
14633 name, BSF_GLOBAL, s,
14634 h->root.u.def.value,
14635 NULL, TRUE, FALSE, &bh);
14637 myh = (struct elf_link_hash_entry *) bh;
14638 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
14639 myh->forced_local = 1;
14640 ARM_SET_SYM_BRANCH_TYPE (myh->target_internal, ST_BRANCH_TO_THUMB);
14641 eh->export_glue = myh;
14642 th = record_arm_to_thumb_glue (info, h);
14643 /* Point the symbol at the stub. */
14644 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
14645 ARM_SET_SYM_BRANCH_TYPE (h->target_internal, ST_BRANCH_TO_ARM);
14646 h->root.u.def.section = th->root.u.def.section;
14647 h->root.u.def.value = th->root.u.def.value & ~1;
14650 if (eh->dyn_relocs == NULL)
14653 /* In the shared -Bsymbolic case, discard space allocated for
14654 dynamic pc-relative relocs against symbols which turn out to be
14655 defined in regular objects. For the normal shared case, discard
14656 space for pc-relative relocs that have become local due to symbol
14657 visibility changes. */
14659 if (bfd_link_pic (info) || htab->root.is_relocatable_executable)
14661 /* Relocs that use pc_count are PC-relative forms, which will appear
14662 on something like ".long foo - ." or "movw REG, foo - .". We want
14663 calls to protected symbols to resolve directly to the function
14664 rather than going via the plt. If people want function pointer
14665 comparisons to work as expected then they should avoid writing
14666 assembly like ".long foo - .". */
14667 if (SYMBOL_CALLS_LOCAL (info, h))
14669 struct elf_dyn_relocs **pp;
14671 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
14673 p->count -= p->pc_count;
14682 if (htab->vxworks_p)
14684 struct elf_dyn_relocs **pp;
14686 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
14688 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
14695 /* Also discard relocs on undefined weak syms with non-default
14697 if (eh->dyn_relocs != NULL
14698 && h->root.type == bfd_link_hash_undefweak)
14700 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
14701 eh->dyn_relocs = NULL;
14703 /* Make sure undefined weak symbols are output as a dynamic
14705 else if (h->dynindx == -1
14706 && !h->forced_local)
14708 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14713 else if (htab->root.is_relocatable_executable && h->dynindx == -1
14714 && h->root.type == bfd_link_hash_new)
14716 /* Output absolute symbols so that we can create relocations
14717 against them. For normal symbols we output a relocation
14718 against the section that contains them. */
14719 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14726 /* For the non-shared case, discard space for relocs against
14727 symbols which turn out to need copy relocs or are not
14730 if (!h->non_got_ref
14731 && ((h->def_dynamic
14732 && !h->def_regular)
14733 || (htab->root.dynamic_sections_created
14734 && (h->root.type == bfd_link_hash_undefweak
14735 || h->root.type == bfd_link_hash_undefined))))
14737 /* Make sure this symbol is output as a dynamic symbol.
14738 Undefined weak syms won't yet be marked as dynamic. */
14739 if (h->dynindx == -1
14740 && !h->forced_local)
14742 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14746 /* If that succeeded, we know we'll be keeping all the
14748 if (h->dynindx != -1)
14752 eh->dyn_relocs = NULL;
14757 /* Finally, allocate space. */
14758 for (p = eh->dyn_relocs; p != NULL; p = p->next)
14760 asection *sreloc = elf_section_data (p->sec)->sreloc;
14761 if (h->type == STT_GNU_IFUNC
14762 && eh->plt.noncall_refcount == 0
14763 && SYMBOL_REFERENCES_LOCAL (info, h))
14764 elf32_arm_allocate_irelocs (info, sreloc, p->count);
14766 elf32_arm_allocate_dynrelocs (info, sreloc, p->count);
14772 /* Find any dynamic relocs that apply to read-only sections. */
14775 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
14777 struct elf32_arm_link_hash_entry * eh;
14778 struct elf_dyn_relocs * p;
14780 eh = (struct elf32_arm_link_hash_entry *) h;
14781 for (p = eh->dyn_relocs; p != NULL; p = p->next)
14783 asection *s = p->sec;
14785 if (s != NULL && (s->flags & SEC_READONLY) != 0)
14787 struct bfd_link_info *info = (struct bfd_link_info *) inf;
14789 info->flags |= DF_TEXTREL;
14791 /* Not an error, just cut short the traversal. */
14799 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
14802 struct elf32_arm_link_hash_table *globals;
14804 globals = elf32_arm_hash_table (info);
14805 if (globals == NULL)
14808 globals->byteswap_code = byteswap_code;
14811 /* Set the sizes of the dynamic sections. */
14814 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
14815 struct bfd_link_info * info)
14820 bfd_boolean relocs;
14822 struct elf32_arm_link_hash_table *htab;
14824 htab = elf32_arm_hash_table (info);
14828 dynobj = elf_hash_table (info)->dynobj;
14829 BFD_ASSERT (dynobj != NULL);
14830 check_use_blx (htab);
14832 if (elf_hash_table (info)->dynamic_sections_created)
14834 /* Set the contents of the .interp section to the interpreter. */
14835 if (bfd_link_executable (info) && !info->nointerp)
14837 s = bfd_get_linker_section (dynobj, ".interp");
14838 BFD_ASSERT (s != NULL);
14839 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
14840 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
14844 /* Set up .got offsets for local syms, and space for local dynamic
14846 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
14848 bfd_signed_vma *local_got;
14849 bfd_signed_vma *end_local_got;
14850 struct arm_local_iplt_info **local_iplt_ptr, *local_iplt;
14851 char *local_tls_type;
14852 bfd_vma *local_tlsdesc_gotent;
14853 bfd_size_type locsymcount;
14854 Elf_Internal_Shdr *symtab_hdr;
14856 bfd_boolean is_vxworks = htab->vxworks_p;
14857 unsigned int symndx;
14859 if (! is_arm_elf (ibfd))
14862 for (s = ibfd->sections; s != NULL; s = s->next)
14864 struct elf_dyn_relocs *p;
14866 for (p = (struct elf_dyn_relocs *)
14867 elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
14869 if (!bfd_is_abs_section (p->sec)
14870 && bfd_is_abs_section (p->sec->output_section))
14872 /* Input section has been discarded, either because
14873 it is a copy of a linkonce section or due to
14874 linker script /DISCARD/, so we'll be discarding
14877 else if (is_vxworks
14878 && strcmp (p->sec->output_section->name,
14881 /* Relocations in vxworks .tls_vars sections are
14882 handled specially by the loader. */
14884 else if (p->count != 0)
14886 srel = elf_section_data (p->sec)->sreloc;
14887 elf32_arm_allocate_dynrelocs (info, srel, p->count);
14888 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
14889 info->flags |= DF_TEXTREL;
14894 local_got = elf_local_got_refcounts (ibfd);
14898 symtab_hdr = & elf_symtab_hdr (ibfd);
14899 locsymcount = symtab_hdr->sh_info;
14900 end_local_got = local_got + locsymcount;
14901 local_iplt_ptr = elf32_arm_local_iplt (ibfd);
14902 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
14903 local_tlsdesc_gotent = elf32_arm_local_tlsdesc_gotent (ibfd);
14905 s = htab->root.sgot;
14906 srel = htab->root.srelgot;
14907 for (; local_got < end_local_got;
14908 ++local_got, ++local_iplt_ptr, ++local_tls_type,
14909 ++local_tlsdesc_gotent, ++symndx)
14911 *local_tlsdesc_gotent = (bfd_vma) -1;
14912 local_iplt = *local_iplt_ptr;
14913 if (local_iplt != NULL)
14915 struct elf_dyn_relocs *p;
14917 if (local_iplt->root.refcount > 0)
14919 elf32_arm_allocate_plt_entry (info, TRUE,
14922 if (local_iplt->arm.noncall_refcount == 0)
14923 /* All references to the PLT are calls, so all
14924 non-call references can resolve directly to the
14925 run-time target. This means that the .got entry
14926 would be the same as the .igot.plt entry, so there's
14927 no point creating both. */
14932 BFD_ASSERT (local_iplt->arm.noncall_refcount == 0);
14933 local_iplt->root.offset = (bfd_vma) -1;
14936 for (p = local_iplt->dyn_relocs; p != NULL; p = p->next)
14940 psrel = elf_section_data (p->sec)->sreloc;
14941 if (local_iplt->arm.noncall_refcount == 0)
14942 elf32_arm_allocate_irelocs (info, psrel, p->count);
14944 elf32_arm_allocate_dynrelocs (info, psrel, p->count);
14947 if (*local_got > 0)
14949 Elf_Internal_Sym *isym;
14951 *local_got = s->size;
14952 if (*local_tls_type & GOT_TLS_GD)
14953 /* TLS_GD relocs need an 8-byte structure in the GOT. */
14955 if (*local_tls_type & GOT_TLS_GDESC)
14957 *local_tlsdesc_gotent = htab->root.sgotplt->size
14958 - elf32_arm_compute_jump_table_size (htab);
14959 htab->root.sgotplt->size += 8;
14960 *local_got = (bfd_vma) -2;
14961 /* plt.got_offset needs to know there's a TLS_DESC
14962 reloc in the middle of .got.plt. */
14963 htab->num_tls_desc++;
14965 if (*local_tls_type & GOT_TLS_IE)
14968 if (*local_tls_type & GOT_NORMAL)
14970 /* If the symbol is both GD and GDESC, *local_got
14971 may have been overwritten. */
14972 *local_got = s->size;
14976 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, symndx);
14980 /* If all references to an STT_GNU_IFUNC PLT are calls,
14981 then all non-call references, including this GOT entry,
14982 resolve directly to the run-time target. */
14983 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
14984 && (local_iplt == NULL
14985 || local_iplt->arm.noncall_refcount == 0))
14986 elf32_arm_allocate_irelocs (info, srel, 1);
14987 else if (bfd_link_pic (info) || output_bfd->flags & DYNAMIC)
14989 if ((bfd_link_pic (info) && !(*local_tls_type & GOT_TLS_GDESC))
14990 || *local_tls_type & GOT_TLS_GD)
14991 elf32_arm_allocate_dynrelocs (info, srel, 1);
14993 if (bfd_link_pic (info) && *local_tls_type & GOT_TLS_GDESC)
14995 elf32_arm_allocate_dynrelocs (info,
14996 htab->root.srelplt, 1);
14997 htab->tls_trampoline = -1;
15002 *local_got = (bfd_vma) -1;
15006 if (htab->tls_ldm_got.refcount > 0)
15008 /* Allocate two GOT entries and one dynamic relocation (if necessary)
15009 for R_ARM_TLS_LDM32 relocations. */
15010 htab->tls_ldm_got.offset = htab->root.sgot->size;
15011 htab->root.sgot->size += 8;
15012 if (bfd_link_pic (info))
15013 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
15016 htab->tls_ldm_got.offset = -1;
15018 /* Allocate global sym .plt and .got entries, and space for global
15019 sym dynamic relocs. */
15020 elf_link_hash_traverse (& htab->root, allocate_dynrelocs_for_symbol, info);
15022 /* Here we rummage through the found bfds to collect glue information. */
15023 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
15025 if (! is_arm_elf (ibfd))
15028 /* Initialise mapping tables for code/data. */
15029 bfd_elf32_arm_init_maps (ibfd);
15031 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
15032 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info)
15033 || !bfd_elf32_arm_stm32l4xx_erratum_scan (ibfd, info))
15034 /* xgettext:c-format */
15035 _bfd_error_handler (_("Errors encountered processing file %s"),
15039 /* Allocate space for the glue sections now that we've sized them. */
15040 bfd_elf32_arm_allocate_interworking_sections (info);
15042 /* For every jump slot reserved in the sgotplt, reloc_count is
15043 incremented. However, when we reserve space for TLS descriptors,
15044 it's not incremented, so in order to compute the space reserved
15045 for them, it suffices to multiply the reloc count by the jump
15047 if (htab->root.srelplt)
15048 htab->sgotplt_jump_table_size = elf32_arm_compute_jump_table_size(htab);
15050 if (htab->tls_trampoline)
15052 if (htab->root.splt->size == 0)
15053 htab->root.splt->size += htab->plt_header_size;
15055 htab->tls_trampoline = htab->root.splt->size;
15056 htab->root.splt->size += htab->plt_entry_size;
15058 /* If we're not using lazy TLS relocations, don't generate the
15059 PLT and GOT entries they require. */
15060 if (!(info->flags & DF_BIND_NOW))
15062 htab->dt_tlsdesc_got = htab->root.sgot->size;
15063 htab->root.sgot->size += 4;
15065 htab->dt_tlsdesc_plt = htab->root.splt->size;
15066 htab->root.splt->size += 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline);
15070 /* The check_relocs and adjust_dynamic_symbol entry points have
15071 determined the sizes of the various dynamic sections. Allocate
15072 memory for them. */
15075 for (s = dynobj->sections; s != NULL; s = s->next)
15079 if ((s->flags & SEC_LINKER_CREATED) == 0)
15082 /* It's OK to base decisions on the section name, because none
15083 of the dynobj section names depend upon the input files. */
15084 name = bfd_get_section_name (dynobj, s);
15086 if (s == htab->root.splt)
15088 /* Remember whether there is a PLT. */
15089 plt = s->size != 0;
15091 else if (CONST_STRNEQ (name, ".rel"))
15095 /* Remember whether there are any reloc sections other
15096 than .rel(a).plt and .rela.plt.unloaded. */
15097 if (s != htab->root.srelplt && s != htab->srelplt2)
15100 /* We use the reloc_count field as a counter if we need
15101 to copy relocs into the output file. */
15102 s->reloc_count = 0;
15105 else if (s != htab->root.sgot
15106 && s != htab->root.sgotplt
15107 && s != htab->root.iplt
15108 && s != htab->root.igotplt
15109 && s != htab->sdynbss)
15111 /* It's not one of our sections, so don't allocate space. */
15117 /* If we don't need this section, strip it from the
15118 output file. This is mostly to handle .rel(a).bss and
15119 .rel(a).plt. We must create both sections in
15120 create_dynamic_sections, because they must be created
15121 before the linker maps input sections to output
15122 sections. The linker does that before
15123 adjust_dynamic_symbol is called, and it is that
15124 function which decides whether anything needs to go
15125 into these sections. */
15126 s->flags |= SEC_EXCLUDE;
15130 if ((s->flags & SEC_HAS_CONTENTS) == 0)
15133 /* Allocate memory for the section contents. */
15134 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
15135 if (s->contents == NULL)
15139 if (elf_hash_table (info)->dynamic_sections_created)
15141 /* Add some entries to the .dynamic section. We fill in the
15142 values later, in elf32_arm_finish_dynamic_sections, but we
15143 must add the entries now so that we get the correct size for
15144 the .dynamic section. The DT_DEBUG entry is filled in by the
15145 dynamic linker and used by the debugger. */
15146 #define add_dynamic_entry(TAG, VAL) \
15147 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
15149 if (bfd_link_executable (info))
15151 if (!add_dynamic_entry (DT_DEBUG, 0))
15157 if ( !add_dynamic_entry (DT_PLTGOT, 0)
15158 || !add_dynamic_entry (DT_PLTRELSZ, 0)
15159 || !add_dynamic_entry (DT_PLTREL,
15160 htab->use_rel ? DT_REL : DT_RELA)
15161 || !add_dynamic_entry (DT_JMPREL, 0))
15164 if (htab->dt_tlsdesc_plt &&
15165 (!add_dynamic_entry (DT_TLSDESC_PLT,0)
15166 || !add_dynamic_entry (DT_TLSDESC_GOT,0)))
15174 if (!add_dynamic_entry (DT_REL, 0)
15175 || !add_dynamic_entry (DT_RELSZ, 0)
15176 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
15181 if (!add_dynamic_entry (DT_RELA, 0)
15182 || !add_dynamic_entry (DT_RELASZ, 0)
15183 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
15188 /* If any dynamic relocs apply to a read-only section,
15189 then we need a DT_TEXTREL entry. */
15190 if ((info->flags & DF_TEXTREL) == 0)
15191 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
15194 if ((info->flags & DF_TEXTREL) != 0)
15196 if (!add_dynamic_entry (DT_TEXTREL, 0))
15199 if (htab->vxworks_p
15200 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
15203 #undef add_dynamic_entry
15208 /* Size sections even though they're not dynamic. We use it to setup
15209 _TLS_MODULE_BASE_, if needed. */
15212 elf32_arm_always_size_sections (bfd *output_bfd,
15213 struct bfd_link_info *info)
15217 if (bfd_link_relocatable (info))
15220 tls_sec = elf_hash_table (info)->tls_sec;
15224 struct elf_link_hash_entry *tlsbase;
15226 tlsbase = elf_link_hash_lookup
15227 (elf_hash_table (info), "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
15231 struct bfd_link_hash_entry *bh = NULL;
15232 const struct elf_backend_data *bed
15233 = get_elf_backend_data (output_bfd);
15235 if (!(_bfd_generic_link_add_one_symbol
15236 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
15237 tls_sec, 0, NULL, FALSE,
15238 bed->collect, &bh)))
15241 tlsbase->type = STT_TLS;
15242 tlsbase = (struct elf_link_hash_entry *)bh;
15243 tlsbase->def_regular = 1;
15244 tlsbase->other = STV_HIDDEN;
15245 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
15251 /* Finish up dynamic symbol handling. We set the contents of various
15252 dynamic sections here. */
15255 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
15256 struct bfd_link_info * info,
15257 struct elf_link_hash_entry * h,
15258 Elf_Internal_Sym * sym)
15260 struct elf32_arm_link_hash_table *htab;
15261 struct elf32_arm_link_hash_entry *eh;
15263 htab = elf32_arm_hash_table (info);
15267 eh = (struct elf32_arm_link_hash_entry *) h;
15269 if (h->plt.offset != (bfd_vma) -1)
15273 BFD_ASSERT (h->dynindx != -1);
15274 if (! elf32_arm_populate_plt_entry (output_bfd, info, &h->plt, &eh->plt,
15279 if (!h->def_regular)
15281 /* Mark the symbol as undefined, rather than as defined in
15282 the .plt section. */
15283 sym->st_shndx = SHN_UNDEF;
15284 /* If the symbol is weak we need to clear the value.
15285 Otherwise, the PLT entry would provide a definition for
15286 the symbol even if the symbol wasn't defined anywhere,
15287 and so the symbol would never be NULL. Leave the value if
15288 there were any relocations where pointer equality matters
15289 (this is a clue for the dynamic linker, to make function
15290 pointer comparisons work between an application and shared
15292 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
15295 else if (eh->is_iplt && eh->plt.noncall_refcount != 0)
15297 /* At least one non-call relocation references this .iplt entry,
15298 so the .iplt entry is the function's canonical address. */
15299 sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC);
15300 ARM_SET_SYM_BRANCH_TYPE (sym->st_target_internal, ST_BRANCH_TO_ARM);
15301 sym->st_shndx = (_bfd_elf_section_from_bfd_section
15302 (output_bfd, htab->root.iplt->output_section));
15303 sym->st_value = (h->plt.offset
15304 + htab->root.iplt->output_section->vma
15305 + htab->root.iplt->output_offset);
15312 Elf_Internal_Rela rel;
15314 /* This symbol needs a copy reloc. Set it up. */
15315 BFD_ASSERT (h->dynindx != -1
15316 && (h->root.type == bfd_link_hash_defined
15317 || h->root.type == bfd_link_hash_defweak));
15320 BFD_ASSERT (s != NULL);
15323 rel.r_offset = (h->root.u.def.value
15324 + h->root.u.def.section->output_section->vma
15325 + h->root.u.def.section->output_offset);
15326 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
15327 elf32_arm_add_dynreloc (output_bfd, info, s, &rel);
15330 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
15331 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
15332 to the ".got" section. */
15333 if (h == htab->root.hdynamic
15334 || (!htab->vxworks_p && h == htab->root.hgot))
15335 sym->st_shndx = SHN_ABS;
15341 arm_put_trampoline (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
15343 const unsigned long *template, unsigned count)
15347 for (ix = 0; ix != count; ix++)
15349 unsigned long insn = template[ix];
15351 /* Emit mov pc,rx if bx is not permitted. */
15352 if (htab->fix_v4bx == 1 && (insn & 0x0ffffff0) == 0x012fff10)
15353 insn = (insn & 0xf000000f) | 0x01a0f000;
15354 put_arm_insn (htab, output_bfd, insn, (char *)contents + ix*4);
15358 /* Install the special first PLT entry for elf32-arm-nacl. Unlike
15359 other variants, NaCl needs this entry in a static executable's
15360 .iplt too. When we're handling that case, GOT_DISPLACEMENT is
15361 zero. For .iplt really only the last bundle is useful, and .iplt
15362 could have a shorter first entry, with each individual PLT entry's
15363 relative branch calculated differently so it targets the last
15364 bundle instead of the instruction before it (labelled .Lplt_tail
15365 above). But it's simpler to keep the size and layout of PLT0
15366 consistent with the dynamic case, at the cost of some dead code at
15367 the start of .iplt and the one dead store to the stack at the start
15370 arm_nacl_put_plt0 (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
15371 asection *plt, bfd_vma got_displacement)
15375 put_arm_insn (htab, output_bfd,
15376 elf32_arm_nacl_plt0_entry[0]
15377 | arm_movw_immediate (got_displacement),
15378 plt->contents + 0);
15379 put_arm_insn (htab, output_bfd,
15380 elf32_arm_nacl_plt0_entry[1]
15381 | arm_movt_immediate (got_displacement),
15382 plt->contents + 4);
15384 for (i = 2; i < ARRAY_SIZE (elf32_arm_nacl_plt0_entry); ++i)
15385 put_arm_insn (htab, output_bfd,
15386 elf32_arm_nacl_plt0_entry[i],
15387 plt->contents + (i * 4));
15390 /* Finish up the dynamic sections. */
15393 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
15398 struct elf32_arm_link_hash_table *htab;
15400 htab = elf32_arm_hash_table (info);
15404 dynobj = elf_hash_table (info)->dynobj;
15406 sgot = htab->root.sgotplt;
15407 /* A broken linker script might have discarded the dynamic sections.
15408 Catch this here so that we do not seg-fault later on. */
15409 if (sgot != NULL && bfd_is_abs_section (sgot->output_section))
15411 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15413 if (elf_hash_table (info)->dynamic_sections_created)
15416 Elf32_External_Dyn *dyncon, *dynconend;
15418 splt = htab->root.splt;
15419 BFD_ASSERT (splt != NULL && sdyn != NULL);
15420 BFD_ASSERT (htab->symbian_p || sgot != NULL);
15422 dyncon = (Elf32_External_Dyn *) sdyn->contents;
15423 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
15425 for (; dyncon < dynconend; dyncon++)
15427 Elf_Internal_Dyn dyn;
15431 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
15438 if (htab->vxworks_p
15439 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
15440 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15445 goto get_vma_if_bpabi;
15448 goto get_vma_if_bpabi;
15451 goto get_vma_if_bpabi;
15453 name = ".gnu.version";
15454 goto get_vma_if_bpabi;
15456 name = ".gnu.version_d";
15457 goto get_vma_if_bpabi;
15459 name = ".gnu.version_r";
15460 goto get_vma_if_bpabi;
15463 name = htab->symbian_p ? ".got" : ".got.plt";
15466 name = RELOC_SECTION (htab, ".plt");
15468 s = bfd_get_linker_section (dynobj, name);
15471 (*_bfd_error_handler)
15472 (_("could not find section %s"), name);
15473 bfd_set_error (bfd_error_invalid_operation);
15476 if (!htab->symbian_p)
15477 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15479 /* In the BPABI, tags in the PT_DYNAMIC section point
15480 at the file offset, not the memory address, for the
15481 convenience of the post linker. */
15482 dyn.d_un.d_ptr = s->output_section->filepos + s->output_offset;
15483 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15487 if (htab->symbian_p)
15492 s = htab->root.srelplt;
15493 BFD_ASSERT (s != NULL);
15494 dyn.d_un.d_val = s->size;
15495 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15500 if (!htab->symbian_p)
15502 /* My reading of the SVR4 ABI indicates that the
15503 procedure linkage table relocs (DT_JMPREL) should be
15504 included in the overall relocs (DT_REL). This is
15505 what Solaris does. However, UnixWare can not handle
15506 that case. Therefore, we override the DT_RELSZ entry
15507 here to make it not include the JMPREL relocs. Since
15508 the linker script arranges for .rel(a).plt to follow all
15509 other relocation sections, we don't have to worry
15510 about changing the DT_REL entry. */
15511 s = htab->root.srelplt;
15513 dyn.d_un.d_val -= s->size;
15514 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15517 /* Fall through. */
15521 /* In the BPABI, the DT_REL tag must point at the file
15522 offset, not the VMA, of the first relocation
15523 section. So, we use code similar to that in
15524 elflink.c, but do not check for SHF_ALLOC on the
15525 relcoation section, since relocations sections are
15526 never allocated under the BPABI. The comments above
15527 about Unixware notwithstanding, we include all of the
15528 relocations here. */
15529 if (htab->symbian_p)
15532 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
15533 ? SHT_REL : SHT_RELA);
15534 dyn.d_un.d_val = 0;
15535 for (i = 1; i < elf_numsections (output_bfd); i++)
15537 Elf_Internal_Shdr *hdr
15538 = elf_elfsections (output_bfd)[i];
15539 if (hdr->sh_type == type)
15541 if (dyn.d_tag == DT_RELSZ
15542 || dyn.d_tag == DT_RELASZ)
15543 dyn.d_un.d_val += hdr->sh_size;
15544 else if ((ufile_ptr) hdr->sh_offset
15545 <= dyn.d_un.d_val - 1)
15546 dyn.d_un.d_val = hdr->sh_offset;
15549 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15553 case DT_TLSDESC_PLT:
15554 s = htab->root.splt;
15555 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
15556 + htab->dt_tlsdesc_plt);
15557 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15560 case DT_TLSDESC_GOT:
15561 s = htab->root.sgot;
15562 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
15563 + htab->dt_tlsdesc_got);
15564 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15567 /* Set the bottom bit of DT_INIT/FINI if the
15568 corresponding function is Thumb. */
15570 name = info->init_function;
15573 name = info->fini_function;
15575 /* If it wasn't set by elf_bfd_final_link
15576 then there is nothing to adjust. */
15577 if (dyn.d_un.d_val != 0)
15579 struct elf_link_hash_entry * eh;
15581 eh = elf_link_hash_lookup (elf_hash_table (info), name,
15582 FALSE, FALSE, TRUE);
15584 && ARM_GET_SYM_BRANCH_TYPE (eh->target_internal)
15585 == ST_BRANCH_TO_THUMB)
15587 dyn.d_un.d_val |= 1;
15588 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15595 /* Fill in the first entry in the procedure linkage table. */
15596 if (splt->size > 0 && htab->plt_header_size)
15598 const bfd_vma *plt0_entry;
15599 bfd_vma got_address, plt_address, got_displacement;
15601 /* Calculate the addresses of the GOT and PLT. */
15602 got_address = sgot->output_section->vma + sgot->output_offset;
15603 plt_address = splt->output_section->vma + splt->output_offset;
15605 if (htab->vxworks_p)
15607 /* The VxWorks GOT is relocated by the dynamic linker.
15608 Therefore, we must emit relocations rather than simply
15609 computing the values now. */
15610 Elf_Internal_Rela rel;
15612 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
15613 put_arm_insn (htab, output_bfd, plt0_entry[0],
15614 splt->contents + 0);
15615 put_arm_insn (htab, output_bfd, plt0_entry[1],
15616 splt->contents + 4);
15617 put_arm_insn (htab, output_bfd, plt0_entry[2],
15618 splt->contents + 8);
15619 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
15621 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
15622 rel.r_offset = plt_address + 12;
15623 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
15625 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
15626 htab->srelplt2->contents);
15628 else if (htab->nacl_p)
15629 arm_nacl_put_plt0 (htab, output_bfd, splt,
15630 got_address + 8 - (plt_address + 16));
15631 else if (using_thumb_only (htab))
15633 got_displacement = got_address - (plt_address + 12);
15635 plt0_entry = elf32_thumb2_plt0_entry;
15636 put_arm_insn (htab, output_bfd, plt0_entry[0],
15637 splt->contents + 0);
15638 put_arm_insn (htab, output_bfd, plt0_entry[1],
15639 splt->contents + 4);
15640 put_arm_insn (htab, output_bfd, plt0_entry[2],
15641 splt->contents + 8);
15643 bfd_put_32 (output_bfd, got_displacement, splt->contents + 12);
15647 got_displacement = got_address - (plt_address + 16);
15649 plt0_entry = elf32_arm_plt0_entry;
15650 put_arm_insn (htab, output_bfd, plt0_entry[0],
15651 splt->contents + 0);
15652 put_arm_insn (htab, output_bfd, plt0_entry[1],
15653 splt->contents + 4);
15654 put_arm_insn (htab, output_bfd, plt0_entry[2],
15655 splt->contents + 8);
15656 put_arm_insn (htab, output_bfd, plt0_entry[3],
15657 splt->contents + 12);
15659 #ifdef FOUR_WORD_PLT
15660 /* The displacement value goes in the otherwise-unused
15661 last word of the second entry. */
15662 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
15664 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
15669 /* UnixWare sets the entsize of .plt to 4, although that doesn't
15670 really seem like the right value. */
15671 if (splt->output_section->owner == output_bfd)
15672 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
15674 if (htab->dt_tlsdesc_plt)
15676 bfd_vma got_address
15677 = sgot->output_section->vma + sgot->output_offset;
15678 bfd_vma gotplt_address = (htab->root.sgot->output_section->vma
15679 + htab->root.sgot->output_offset);
15680 bfd_vma plt_address
15681 = splt->output_section->vma + splt->output_offset;
15683 arm_put_trampoline (htab, output_bfd,
15684 splt->contents + htab->dt_tlsdesc_plt,
15685 dl_tlsdesc_lazy_trampoline, 6);
15687 bfd_put_32 (output_bfd,
15688 gotplt_address + htab->dt_tlsdesc_got
15689 - (plt_address + htab->dt_tlsdesc_plt)
15690 - dl_tlsdesc_lazy_trampoline[6],
15691 splt->contents + htab->dt_tlsdesc_plt + 24);
15692 bfd_put_32 (output_bfd,
15693 got_address - (plt_address + htab->dt_tlsdesc_plt)
15694 - dl_tlsdesc_lazy_trampoline[7],
15695 splt->contents + htab->dt_tlsdesc_plt + 24 + 4);
15698 if (htab->tls_trampoline)
15700 arm_put_trampoline (htab, output_bfd,
15701 splt->contents + htab->tls_trampoline,
15702 tls_trampoline, 3);
15703 #ifdef FOUR_WORD_PLT
15704 bfd_put_32 (output_bfd, 0x00000000,
15705 splt->contents + htab->tls_trampoline + 12);
15709 if (htab->vxworks_p
15710 && !bfd_link_pic (info)
15711 && htab->root.splt->size > 0)
15713 /* Correct the .rel(a).plt.unloaded relocations. They will have
15714 incorrect symbol indexes. */
15718 num_plts = ((htab->root.splt->size - htab->plt_header_size)
15719 / htab->plt_entry_size);
15720 p = htab->srelplt2->contents + RELOC_SIZE (htab);
15722 for (; num_plts; num_plts--)
15724 Elf_Internal_Rela rel;
15726 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
15727 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
15728 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
15729 p += RELOC_SIZE (htab);
15731 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
15732 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
15733 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
15734 p += RELOC_SIZE (htab);
15739 if (htab->nacl_p && htab->root.iplt != NULL && htab->root.iplt->size > 0)
15740 /* NaCl uses a special first entry in .iplt too. */
15741 arm_nacl_put_plt0 (htab, output_bfd, htab->root.iplt, 0);
15743 /* Fill in the first three entries in the global offset table. */
15746 if (sgot->size > 0)
15749 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
15751 bfd_put_32 (output_bfd,
15752 sdyn->output_section->vma + sdyn->output_offset,
15754 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
15755 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
15758 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
15765 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
15767 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
15768 struct elf32_arm_link_hash_table *globals;
15769 struct elf_segment_map *m;
15771 i_ehdrp = elf_elfheader (abfd);
15773 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
15774 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
15776 _bfd_elf_post_process_headers (abfd, link_info);
15777 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
15781 globals = elf32_arm_hash_table (link_info);
15782 if (globals != NULL && globals->byteswap_code)
15783 i_ehdrp->e_flags |= EF_ARM_BE8;
15786 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_VER5
15787 && ((i_ehdrp->e_type == ET_DYN) || (i_ehdrp->e_type == ET_EXEC)))
15789 int abi = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_ABI_VFP_args);
15790 if (abi == AEABI_VFP_args_vfp)
15791 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_HARD;
15793 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_SOFT;
15796 /* Scan segment to set p_flags attribute if it contains only sections with
15797 SHF_ARM_NOREAD flag. */
15798 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
15804 for (j = 0; j < m->count; j++)
15806 if (!(elf_section_flags (m->sections[j]) & SHF_ARM_NOREAD))
15812 m->p_flags_valid = 1;
15817 static enum elf_reloc_type_class
15818 elf32_arm_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
15819 const asection *rel_sec ATTRIBUTE_UNUSED,
15820 const Elf_Internal_Rela *rela)
15822 switch ((int) ELF32_R_TYPE (rela->r_info))
15824 case R_ARM_RELATIVE:
15825 return reloc_class_relative;
15826 case R_ARM_JUMP_SLOT:
15827 return reloc_class_plt;
15829 return reloc_class_copy;
15830 case R_ARM_IRELATIVE:
15831 return reloc_class_ifunc;
15833 return reloc_class_normal;
15838 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
15840 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
15843 /* Return TRUE if this is an unwinding table entry. */
15846 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
15848 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
15849 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
15853 /* Set the type and flags for an ARM section. We do this by
15854 the section name, which is a hack, but ought to work. */
15857 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
15861 name = bfd_get_section_name (abfd, sec);
15863 if (is_arm_elf_unwind_section_name (abfd, name))
15865 hdr->sh_type = SHT_ARM_EXIDX;
15866 hdr->sh_flags |= SHF_LINK_ORDER;
15869 if (sec->flags & SEC_ELF_NOREAD)
15870 hdr->sh_flags |= SHF_ARM_NOREAD;
15875 /* Handle an ARM specific section when reading an object file. This is
15876 called when bfd_section_from_shdr finds a section with an unknown
15880 elf32_arm_section_from_shdr (bfd *abfd,
15881 Elf_Internal_Shdr * hdr,
15885 /* There ought to be a place to keep ELF backend specific flags, but
15886 at the moment there isn't one. We just keep track of the
15887 sections by their name, instead. Fortunately, the ABI gives
15888 names for all the ARM specific sections, so we will probably get
15890 switch (hdr->sh_type)
15892 case SHT_ARM_EXIDX:
15893 case SHT_ARM_PREEMPTMAP:
15894 case SHT_ARM_ATTRIBUTES:
15901 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
15907 static _arm_elf_section_data *
15908 get_arm_elf_section_data (asection * sec)
15910 if (sec && sec->owner && is_arm_elf (sec->owner))
15911 return elf32_arm_section_data (sec);
15919 struct bfd_link_info *info;
15922 int (*func) (void *, const char *, Elf_Internal_Sym *,
15923 asection *, struct elf_link_hash_entry *);
15924 } output_arch_syminfo;
15926 enum map_symbol_type
15934 /* Output a single mapping symbol. */
15937 elf32_arm_output_map_sym (output_arch_syminfo *osi,
15938 enum map_symbol_type type,
15941 static const char *names[3] = {"$a", "$t", "$d"};
15942 Elf_Internal_Sym sym;
15944 sym.st_value = osi->sec->output_section->vma
15945 + osi->sec->output_offset
15949 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
15950 sym.st_shndx = osi->sec_shndx;
15951 sym.st_target_internal = 0;
15952 elf32_arm_section_map_add (osi->sec, names[type][1], offset);
15953 return osi->func (osi->flaginfo, names[type], &sym, osi->sec, NULL) == 1;
15956 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
15957 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
15960 elf32_arm_output_plt_map_1 (output_arch_syminfo *osi,
15961 bfd_boolean is_iplt_entry_p,
15962 union gotplt_union *root_plt,
15963 struct arm_plt_info *arm_plt)
15965 struct elf32_arm_link_hash_table *htab;
15966 bfd_vma addr, plt_header_size;
15968 if (root_plt->offset == (bfd_vma) -1)
15971 htab = elf32_arm_hash_table (osi->info);
15975 if (is_iplt_entry_p)
15977 osi->sec = htab->root.iplt;
15978 plt_header_size = 0;
15982 osi->sec = htab->root.splt;
15983 plt_header_size = htab->plt_header_size;
15985 osi->sec_shndx = (_bfd_elf_section_from_bfd_section
15986 (osi->info->output_bfd, osi->sec->output_section));
15988 addr = root_plt->offset & -2;
15989 if (htab->symbian_p)
15991 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
15993 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
15996 else if (htab->vxworks_p)
15998 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16000 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
16002 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
16004 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
16007 else if (htab->nacl_p)
16009 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16012 else if (using_thumb_only (htab))
16014 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
16019 bfd_boolean thumb_stub_p;
16021 thumb_stub_p = elf32_arm_plt_needs_thumb_stub_p (osi->info, arm_plt);
16024 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
16027 #ifdef FOUR_WORD_PLT
16028 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16030 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
16033 /* A three-word PLT with no Thumb thunk contains only Arm code,
16034 so only need to output a mapping symbol for the first PLT entry and
16035 entries with thumb thunks. */
16036 if (thumb_stub_p || addr == plt_header_size)
16038 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
16047 /* Output mapping symbols for PLT entries associated with H. */
16050 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
16052 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
16053 struct elf32_arm_link_hash_entry *eh;
16055 if (h->root.type == bfd_link_hash_indirect)
16058 if (h->root.type == bfd_link_hash_warning)
16059 /* When warning symbols are created, they **replace** the "real"
16060 entry in the hash table, thus we never get to see the real
16061 symbol in a hash traversal. So look at it now. */
16062 h = (struct elf_link_hash_entry *) h->root.u.i.link;
16064 eh = (struct elf32_arm_link_hash_entry *) h;
16065 return elf32_arm_output_plt_map_1 (osi, SYMBOL_CALLS_LOCAL (osi->info, h),
16066 &h->plt, &eh->plt);
16069 /* Bind a veneered symbol to its veneer identified by its hash entry
16070 STUB_ENTRY. The veneered location thus loose its symbol. */
16073 arm_stub_claim_sym (struct elf32_arm_stub_hash_entry *stub_entry)
16075 struct elf32_arm_link_hash_entry *hash = stub_entry->h;
16078 hash->root.root.u.def.section = stub_entry->stub_sec;
16079 hash->root.root.u.def.value = stub_entry->stub_offset;
16080 hash->root.size = stub_entry->stub_size;
16083 /* Output a single local symbol for a generated stub. */
16086 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
16087 bfd_vma offset, bfd_vma size)
16089 Elf_Internal_Sym sym;
16091 sym.st_value = osi->sec->output_section->vma
16092 + osi->sec->output_offset
16094 sym.st_size = size;
16096 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
16097 sym.st_shndx = osi->sec_shndx;
16098 sym.st_target_internal = 0;
16099 return osi->func (osi->flaginfo, name, &sym, osi->sec, NULL) == 1;
16103 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
16106 struct elf32_arm_stub_hash_entry *stub_entry;
16107 asection *stub_sec;
16110 output_arch_syminfo *osi;
16111 const insn_sequence *template_sequence;
16112 enum stub_insn_type prev_type;
16115 enum map_symbol_type sym_type;
16117 /* Massage our args to the form they really have. */
16118 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
16119 osi = (output_arch_syminfo *) in_arg;
16121 stub_sec = stub_entry->stub_sec;
16123 /* Ensure this stub is attached to the current section being
16125 if (stub_sec != osi->sec)
16128 addr = (bfd_vma) stub_entry->stub_offset;
16129 template_sequence = stub_entry->stub_template;
16131 if (arm_stub_sym_claimed (stub_entry->stub_type))
16132 arm_stub_claim_sym (stub_entry);
16135 stub_name = stub_entry->output_name;
16136 switch (template_sequence[0].type)
16139 if (!elf32_arm_output_stub_sym (osi, stub_name, addr,
16140 stub_entry->stub_size))
16145 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1,
16146 stub_entry->stub_size))
16155 prev_type = DATA_TYPE;
16157 for (i = 0; i < stub_entry->stub_template_size; i++)
16159 switch (template_sequence[i].type)
16162 sym_type = ARM_MAP_ARM;
16167 sym_type = ARM_MAP_THUMB;
16171 sym_type = ARM_MAP_DATA;
16179 if (template_sequence[i].type != prev_type)
16181 prev_type = template_sequence[i].type;
16182 if (!elf32_arm_output_map_sym (osi, sym_type, addr + size))
16186 switch (template_sequence[i].type)
16210 /* Output mapping symbols for linker generated sections,
16211 and for those data-only sections that do not have a
16215 elf32_arm_output_arch_local_syms (bfd *output_bfd,
16216 struct bfd_link_info *info,
16218 int (*func) (void *, const char *,
16219 Elf_Internal_Sym *,
16221 struct elf_link_hash_entry *))
16223 output_arch_syminfo osi;
16224 struct elf32_arm_link_hash_table *htab;
16226 bfd_size_type size;
16229 htab = elf32_arm_hash_table (info);
16233 check_use_blx (htab);
16235 osi.flaginfo = flaginfo;
16239 /* Add a $d mapping symbol to data-only sections that
16240 don't have any mapping symbol. This may result in (harmless) redundant
16241 mapping symbols. */
16242 for (input_bfd = info->input_bfds;
16244 input_bfd = input_bfd->link.next)
16246 if ((input_bfd->flags & (BFD_LINKER_CREATED | HAS_SYMS)) == HAS_SYMS)
16247 for (osi.sec = input_bfd->sections;
16249 osi.sec = osi.sec->next)
16251 if (osi.sec->output_section != NULL
16252 && ((osi.sec->output_section->flags & (SEC_ALLOC | SEC_CODE))
16254 && (osi.sec->flags & (SEC_HAS_CONTENTS | SEC_LINKER_CREATED))
16255 == SEC_HAS_CONTENTS
16256 && get_arm_elf_section_data (osi.sec) != NULL
16257 && get_arm_elf_section_data (osi.sec)->mapcount == 0
16258 && osi.sec->size > 0
16259 && (osi.sec->flags & SEC_EXCLUDE) == 0)
16261 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16262 (output_bfd, osi.sec->output_section);
16263 if (osi.sec_shndx != (int)SHN_BAD)
16264 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 0);
16269 /* ARM->Thumb glue. */
16270 if (htab->arm_glue_size > 0)
16272 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
16273 ARM2THUMB_GLUE_SECTION_NAME);
16275 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16276 (output_bfd, osi.sec->output_section);
16277 if (bfd_link_pic (info) || htab->root.is_relocatable_executable
16278 || htab->pic_veneer)
16279 size = ARM2THUMB_PIC_GLUE_SIZE;
16280 else if (htab->use_blx)
16281 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
16283 size = ARM2THUMB_STATIC_GLUE_SIZE;
16285 for (offset = 0; offset < htab->arm_glue_size; offset += size)
16287 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
16288 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
16292 /* Thumb->ARM glue. */
16293 if (htab->thumb_glue_size > 0)
16295 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
16296 THUMB2ARM_GLUE_SECTION_NAME);
16298 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16299 (output_bfd, osi.sec->output_section);
16300 size = THUMB2ARM_GLUE_SIZE;
16302 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
16304 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
16305 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
16309 /* ARMv4 BX veneers. */
16310 if (htab->bx_glue_size > 0)
16312 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
16313 ARM_BX_GLUE_SECTION_NAME);
16315 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16316 (output_bfd, osi.sec->output_section);
16318 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
16321 /* Long calls stubs. */
16322 if (htab->stub_bfd && htab->stub_bfd->sections)
16324 asection* stub_sec;
16326 for (stub_sec = htab->stub_bfd->sections;
16328 stub_sec = stub_sec->next)
16330 /* Ignore non-stub sections. */
16331 if (!strstr (stub_sec->name, STUB_SUFFIX))
16334 osi.sec = stub_sec;
16336 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16337 (output_bfd, osi.sec->output_section);
16339 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
16343 /* Finally, output mapping symbols for the PLT. */
16344 if (htab->root.splt && htab->root.splt->size > 0)
16346 osi.sec = htab->root.splt;
16347 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
16348 (output_bfd, osi.sec->output_section));
16350 /* Output mapping symbols for the plt header. SymbianOS does not have a
16352 if (htab->vxworks_p)
16354 /* VxWorks shared libraries have no PLT header. */
16355 if (!bfd_link_pic (info))
16357 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16359 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
16363 else if (htab->nacl_p)
16365 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16368 else if (using_thumb_only (htab))
16370 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 0))
16372 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
16374 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 16))
16377 else if (!htab->symbian_p)
16379 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16381 #ifndef FOUR_WORD_PLT
16382 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
16387 if (htab->nacl_p && htab->root.iplt && htab->root.iplt->size > 0)
16389 /* NaCl uses a special first entry in .iplt too. */
16390 osi.sec = htab->root.iplt;
16391 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
16392 (output_bfd, osi.sec->output_section));
16393 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16396 if ((htab->root.splt && htab->root.splt->size > 0)
16397 || (htab->root.iplt && htab->root.iplt->size > 0))
16399 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, &osi);
16400 for (input_bfd = info->input_bfds;
16402 input_bfd = input_bfd->link.next)
16404 struct arm_local_iplt_info **local_iplt;
16405 unsigned int i, num_syms;
16407 local_iplt = elf32_arm_local_iplt (input_bfd);
16408 if (local_iplt != NULL)
16410 num_syms = elf_symtab_hdr (input_bfd).sh_info;
16411 for (i = 0; i < num_syms; i++)
16412 if (local_iplt[i] != NULL
16413 && !elf32_arm_output_plt_map_1 (&osi, TRUE,
16414 &local_iplt[i]->root,
16415 &local_iplt[i]->arm))
16420 if (htab->dt_tlsdesc_plt != 0)
16422 /* Mapping symbols for the lazy tls trampoline. */
16423 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->dt_tlsdesc_plt))
16426 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
16427 htab->dt_tlsdesc_plt + 24))
16430 if (htab->tls_trampoline != 0)
16432 /* Mapping symbols for the tls trampoline. */
16433 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->tls_trampoline))
16435 #ifdef FOUR_WORD_PLT
16436 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
16437 htab->tls_trampoline + 12))
16445 /* Allocate target specific section data. */
16448 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
16450 if (!sec->used_by_bfd)
16452 _arm_elf_section_data *sdata;
16453 bfd_size_type amt = sizeof (*sdata);
16455 sdata = (_arm_elf_section_data *) bfd_zalloc (abfd, amt);
16458 sec->used_by_bfd = sdata;
16461 return _bfd_elf_new_section_hook (abfd, sec);
16465 /* Used to order a list of mapping symbols by address. */
16468 elf32_arm_compare_mapping (const void * a, const void * b)
16470 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
16471 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
16473 if (amap->vma > bmap->vma)
16475 else if (amap->vma < bmap->vma)
16477 else if (amap->type > bmap->type)
16478 /* Ensure results do not depend on the host qsort for objects with
16479 multiple mapping symbols at the same address by sorting on type
16482 else if (amap->type < bmap->type)
16488 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
16490 static unsigned long
16491 offset_prel31 (unsigned long addr, bfd_vma offset)
16493 return (addr & ~0x7ffffffful) | ((addr + offset) & 0x7ffffffful);
16496 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
16500 copy_exidx_entry (bfd *output_bfd, bfd_byte *to, bfd_byte *from, bfd_vma offset)
16502 unsigned long first_word = bfd_get_32 (output_bfd, from);
16503 unsigned long second_word = bfd_get_32 (output_bfd, from + 4);
16505 /* High bit of first word is supposed to be zero. */
16506 if ((first_word & 0x80000000ul) == 0)
16507 first_word = offset_prel31 (first_word, offset);
16509 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
16510 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
16511 if ((second_word != 0x1) && ((second_word & 0x80000000ul) == 0))
16512 second_word = offset_prel31 (second_word, offset);
16514 bfd_put_32 (output_bfd, first_word, to);
16515 bfd_put_32 (output_bfd, second_word, to + 4);
16518 /* Data for make_branch_to_a8_stub(). */
16520 struct a8_branch_to_stub_data
16522 asection *writing_section;
16523 bfd_byte *contents;
16527 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
16528 places for a particular section. */
16531 make_branch_to_a8_stub (struct bfd_hash_entry *gen_entry,
16534 struct elf32_arm_stub_hash_entry *stub_entry;
16535 struct a8_branch_to_stub_data *data;
16536 bfd_byte *contents;
16537 unsigned long branch_insn;
16538 bfd_vma veneered_insn_loc, veneer_entry_loc;
16539 bfd_signed_vma branch_offset;
16543 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
16544 data = (struct a8_branch_to_stub_data *) in_arg;
16546 if (stub_entry->target_section != data->writing_section
16547 || stub_entry->stub_type < arm_stub_a8_veneer_lwm)
16550 contents = data->contents;
16552 /* We use target_section as Cortex-A8 erratum workaround stubs are only
16553 generated when both source and target are in the same section. */
16554 veneered_insn_loc = stub_entry->target_section->output_section->vma
16555 + stub_entry->target_section->output_offset
16556 + stub_entry->source_value;
16558 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
16559 + stub_entry->stub_sec->output_offset
16560 + stub_entry->stub_offset;
16562 if (stub_entry->stub_type == arm_stub_a8_veneer_blx)
16563 veneered_insn_loc &= ~3u;
16565 branch_offset = veneer_entry_loc - veneered_insn_loc - 4;
16567 abfd = stub_entry->target_section->owner;
16568 loc = stub_entry->source_value;
16570 /* We attempt to avoid this condition by setting stubs_always_after_branch
16571 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
16572 This check is just to be on the safe side... */
16573 if ((veneered_insn_loc & ~0xfff) == (veneer_entry_loc & ~0xfff))
16575 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub is "
16576 "allocated in unsafe location"), abfd);
16580 switch (stub_entry->stub_type)
16582 case arm_stub_a8_veneer_b:
16583 case arm_stub_a8_veneer_b_cond:
16584 branch_insn = 0xf0009000;
16587 case arm_stub_a8_veneer_blx:
16588 branch_insn = 0xf000e800;
16591 case arm_stub_a8_veneer_bl:
16593 unsigned int i1, j1, i2, j2, s;
16595 branch_insn = 0xf000d000;
16598 if (branch_offset < -16777216 || branch_offset > 16777214)
16600 /* There's not much we can do apart from complain if this
16602 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub out "
16603 "of range (input file too large)"), abfd);
16607 /* i1 = not(j1 eor s), so:
16609 j1 = (not i1) eor s. */
16611 branch_insn |= (branch_offset >> 1) & 0x7ff;
16612 branch_insn |= ((branch_offset >> 12) & 0x3ff) << 16;
16613 i2 = (branch_offset >> 22) & 1;
16614 i1 = (branch_offset >> 23) & 1;
16615 s = (branch_offset >> 24) & 1;
16618 branch_insn |= j2 << 11;
16619 branch_insn |= j1 << 13;
16620 branch_insn |= s << 26;
16629 bfd_put_16 (abfd, (branch_insn >> 16) & 0xffff, &contents[loc]);
16630 bfd_put_16 (abfd, branch_insn & 0xffff, &contents[loc + 2]);
16635 /* Beginning of stm32l4xx work-around. */
16637 /* Functions encoding instructions necessary for the emission of the
16638 fix-stm32l4xx-629360.
16639 Encoding is extracted from the
16640 ARM (C) Architecture Reference Manual
16641 ARMv7-A and ARMv7-R edition
16642 ARM DDI 0406C.b (ID072512). */
16644 static inline bfd_vma
16645 create_instruction_branch_absolute (int branch_offset)
16647 /* A8.8.18 B (A8-334)
16648 B target_address (Encoding T4). */
16649 /* 1111 - 0Sii - iiii - iiii - 10J1 - Jiii - iiii - iiii. */
16650 /* jump offset is: S:I1:I2:imm10:imm11:0. */
16651 /* with : I1 = NOT (J1 EOR S) I2 = NOT (J2 EOR S). */
16653 int s = ((branch_offset & 0x1000000) >> 24);
16654 int j1 = s ^ !((branch_offset & 0x800000) >> 23);
16655 int j2 = s ^ !((branch_offset & 0x400000) >> 22);
16657 if (branch_offset < -(1 << 24) || branch_offset >= (1 << 24))
16658 BFD_ASSERT (0 && "Error: branch out of range. Cannot create branch.");
16660 bfd_vma patched_inst = 0xf0009000
16662 | (((unsigned long) (branch_offset) >> 12) & 0x3ff) << 16 /* imm10. */
16663 | j1 << 13 /* J1. */
16664 | j2 << 11 /* J2. */
16665 | (((unsigned long) (branch_offset) >> 1) & 0x7ff); /* imm11. */
16667 return patched_inst;
16670 static inline bfd_vma
16671 create_instruction_ldmia (int base_reg, int wback, int reg_mask)
16673 /* A8.8.57 LDM/LDMIA/LDMFD (A8-396)
16674 LDMIA Rn!, {Ra, Rb, Rc, ...} (Encoding T2). */
16675 bfd_vma patched_inst = 0xe8900000
16676 | (/*W=*/wback << 21)
16678 | (reg_mask & 0x0000ffff);
16680 return patched_inst;
16683 static inline bfd_vma
16684 create_instruction_ldmdb (int base_reg, int wback, int reg_mask)
16686 /* A8.8.60 LDMDB/LDMEA (A8-402)
16687 LDMDB Rn!, {Ra, Rb, Rc, ...} (Encoding T1). */
16688 bfd_vma patched_inst = 0xe9100000
16689 | (/*W=*/wback << 21)
16691 | (reg_mask & 0x0000ffff);
16693 return patched_inst;
16696 static inline bfd_vma
16697 create_instruction_mov (int target_reg, int source_reg)
16699 /* A8.8.103 MOV (register) (A8-486)
16700 MOV Rd, Rm (Encoding T1). */
16701 bfd_vma patched_inst = 0x4600
16702 | (target_reg & 0x7)
16703 | ((target_reg & 0x8) >> 3) << 7
16704 | (source_reg << 3);
16706 return patched_inst;
16709 static inline bfd_vma
16710 create_instruction_sub (int target_reg, int source_reg, int value)
16712 /* A8.8.221 SUB (immediate) (A8-708)
16713 SUB Rd, Rn, #value (Encoding T3). */
16714 bfd_vma patched_inst = 0xf1a00000
16715 | (target_reg << 8)
16716 | (source_reg << 16)
16718 | ((value & 0x800) >> 11) << 26
16719 | ((value & 0x700) >> 8) << 12
16722 return patched_inst;
16725 static inline bfd_vma
16726 create_instruction_vldmia (int base_reg, int is_dp, int wback, int num_words,
16729 /* A8.8.332 VLDM (A8-922)
16730 VLMD{MODE} Rn{!}, {list} (Encoding T1 or T2). */
16731 bfd_vma patched_inst = (is_dp ? 0xec900b00 : 0xec900a00)
16732 | (/*W=*/wback << 21)
16734 | (num_words & 0x000000ff)
16735 | (((unsigned)first_reg >> 1) & 0x0000000f) << 12
16736 | (first_reg & 0x00000001) << 22;
16738 return patched_inst;
16741 static inline bfd_vma
16742 create_instruction_vldmdb (int base_reg, int is_dp, int num_words,
16745 /* A8.8.332 VLDM (A8-922)
16746 VLMD{MODE} Rn!, {} (Encoding T1 or T2). */
16747 bfd_vma patched_inst = (is_dp ? 0xed300b00 : 0xed300a00)
16749 | (num_words & 0x000000ff)
16750 | (((unsigned)first_reg >>1 ) & 0x0000000f) << 12
16751 | (first_reg & 0x00000001) << 22;
16753 return patched_inst;
16756 static inline bfd_vma
16757 create_instruction_udf_w (int value)
16759 /* A8.8.247 UDF (A8-758)
16760 Undefined (Encoding T2). */
16761 bfd_vma patched_inst = 0xf7f0a000
16762 | (value & 0x00000fff)
16763 | (value & 0x000f0000) << 16;
16765 return patched_inst;
16768 static inline bfd_vma
16769 create_instruction_udf (int value)
16771 /* A8.8.247 UDF (A8-758)
16772 Undefined (Encoding T1). */
16773 bfd_vma patched_inst = 0xde00
16776 return patched_inst;
16779 /* Functions writing an instruction in memory, returning the next
16780 memory position to write to. */
16782 static inline bfd_byte *
16783 push_thumb2_insn32 (struct elf32_arm_link_hash_table * htab,
16784 bfd * output_bfd, bfd_byte *pt, insn32 insn)
16786 put_thumb2_insn (htab, output_bfd, insn, pt);
16790 static inline bfd_byte *
16791 push_thumb2_insn16 (struct elf32_arm_link_hash_table * htab,
16792 bfd * output_bfd, bfd_byte *pt, insn32 insn)
16794 put_thumb_insn (htab, output_bfd, insn, pt);
16798 /* Function filling up a region in memory with T1 and T2 UDFs taking
16799 care of alignment. */
16802 stm32l4xx_fill_stub_udf (struct elf32_arm_link_hash_table * htab,
16804 const bfd_byte * const base_stub_contents,
16805 bfd_byte * const from_stub_contents,
16806 const bfd_byte * const end_stub_contents)
16808 bfd_byte *current_stub_contents = from_stub_contents;
16810 /* Fill the remaining of the stub with deterministic contents : UDF
16812 Check if realignment is needed on modulo 4 frontier using T1, to
16814 if ((current_stub_contents < end_stub_contents)
16815 && !((current_stub_contents - base_stub_contents) % 2)
16816 && ((current_stub_contents - base_stub_contents) % 4))
16817 current_stub_contents =
16818 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16819 create_instruction_udf (0));
16821 for (; current_stub_contents < end_stub_contents;)
16822 current_stub_contents =
16823 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16824 create_instruction_udf_w (0));
16826 return current_stub_contents;
16829 /* Functions writing the stream of instructions equivalent to the
16830 derived sequence for ldmia, ldmdb, vldm respectively. */
16833 stm32l4xx_create_replacing_stub_ldmia (struct elf32_arm_link_hash_table * htab,
16835 const insn32 initial_insn,
16836 const bfd_byte *const initial_insn_addr,
16837 bfd_byte *const base_stub_contents)
16839 int wback = (initial_insn & 0x00200000) >> 21;
16840 int ri, rn = (initial_insn & 0x000F0000) >> 16;
16841 int insn_all_registers = initial_insn & 0x0000ffff;
16842 int insn_low_registers, insn_high_registers;
16843 int usable_register_mask;
16844 int nb_registers = popcount (insn_all_registers);
16845 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
16846 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
16847 bfd_byte *current_stub_contents = base_stub_contents;
16849 BFD_ASSERT (is_thumb2_ldmia (initial_insn));
16851 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
16852 smaller than 8 registers load sequences that do not cause the
16854 if (nb_registers <= 8)
16856 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
16857 current_stub_contents =
16858 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16861 /* B initial_insn_addr+4. */
16863 current_stub_contents =
16864 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16865 create_instruction_branch_absolute
16866 (initial_insn_addr - current_stub_contents));
16869 /* Fill the remaining of the stub with deterministic contents. */
16870 current_stub_contents =
16871 stm32l4xx_fill_stub_udf (htab, output_bfd,
16872 base_stub_contents, current_stub_contents,
16873 base_stub_contents +
16874 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
16879 /* - reg_list[13] == 0. */
16880 BFD_ASSERT ((insn_all_registers & (1 << 13))==0);
16882 /* - reg_list[14] & reg_list[15] != 1. */
16883 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
16885 /* - if (wback==1) reg_list[rn] == 0. */
16886 BFD_ASSERT (!wback || !restore_rn);
16888 /* - nb_registers > 8. */
16889 BFD_ASSERT (popcount (insn_all_registers) > 8);
16891 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
16893 /* In the following algorithm, we split this wide LDM using 2 LDM insns:
16894 - One with the 7 lowest registers (register mask 0x007F)
16895 This LDM will finally contain between 2 and 7 registers
16896 - One with the 7 highest registers (register mask 0xDF80)
16897 This ldm will finally contain between 2 and 7 registers. */
16898 insn_low_registers = insn_all_registers & 0x007F;
16899 insn_high_registers = insn_all_registers & 0xDF80;
16901 /* A spare register may be needed during this veneer to temporarily
16902 handle the base register. This register will be restored with the
16903 last LDM operation.
16904 The usable register may be any general purpose register (that
16905 excludes PC, SP, LR : register mask is 0x1FFF). */
16906 usable_register_mask = 0x1FFF;
16908 /* Generate the stub function. */
16911 /* LDMIA Rn!, {R-low-register-list} : (Encoding T2). */
16912 current_stub_contents =
16913 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16914 create_instruction_ldmia
16915 (rn, /*wback=*/1, insn_low_registers));
16917 /* LDMIA Rn!, {R-high-register-list} : (Encoding T2). */
16918 current_stub_contents =
16919 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16920 create_instruction_ldmia
16921 (rn, /*wback=*/1, insn_high_registers));
16924 /* B initial_insn_addr+4. */
16925 current_stub_contents =
16926 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16927 create_instruction_branch_absolute
16928 (initial_insn_addr - current_stub_contents));
16931 else /* if (!wback). */
16935 /* If Rn is not part of the high-register-list, move it there. */
16936 if (!(insn_high_registers & (1 << rn)))
16938 /* Choose a Ri in the high-register-list that will be restored. */
16939 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
16942 current_stub_contents =
16943 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16944 create_instruction_mov (ri, rn));
16947 /* LDMIA Ri!, {R-low-register-list} : (Encoding T2). */
16948 current_stub_contents =
16949 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16950 create_instruction_ldmia
16951 (ri, /*wback=*/1, insn_low_registers));
16953 /* LDMIA Ri, {R-high-register-list} : (Encoding T2). */
16954 current_stub_contents =
16955 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16956 create_instruction_ldmia
16957 (ri, /*wback=*/0, insn_high_registers));
16961 /* B initial_insn_addr+4. */
16962 current_stub_contents =
16963 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16964 create_instruction_branch_absolute
16965 (initial_insn_addr - current_stub_contents));
16969 /* Fill the remaining of the stub with deterministic contents. */
16970 current_stub_contents =
16971 stm32l4xx_fill_stub_udf (htab, output_bfd,
16972 base_stub_contents, current_stub_contents,
16973 base_stub_contents +
16974 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
16978 stm32l4xx_create_replacing_stub_ldmdb (struct elf32_arm_link_hash_table * htab,
16980 const insn32 initial_insn,
16981 const bfd_byte *const initial_insn_addr,
16982 bfd_byte *const base_stub_contents)
16984 int wback = (initial_insn & 0x00200000) >> 21;
16985 int ri, rn = (initial_insn & 0x000f0000) >> 16;
16986 int insn_all_registers = initial_insn & 0x0000ffff;
16987 int insn_low_registers, insn_high_registers;
16988 int usable_register_mask;
16989 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
16990 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
16991 int nb_registers = popcount (insn_all_registers);
16992 bfd_byte *current_stub_contents = base_stub_contents;
16994 BFD_ASSERT (is_thumb2_ldmdb (initial_insn));
16996 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
16997 smaller than 8 registers load sequences that do not cause the
16999 if (nb_registers <= 8)
17001 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
17002 current_stub_contents =
17003 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17006 /* B initial_insn_addr+4. */
17007 current_stub_contents =
17008 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17009 create_instruction_branch_absolute
17010 (initial_insn_addr - current_stub_contents));
17012 /* Fill the remaining of the stub with deterministic contents. */
17013 current_stub_contents =
17014 stm32l4xx_fill_stub_udf (htab, output_bfd,
17015 base_stub_contents, current_stub_contents,
17016 base_stub_contents +
17017 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
17022 /* - reg_list[13] == 0. */
17023 BFD_ASSERT ((insn_all_registers & (1 << 13)) == 0);
17025 /* - reg_list[14] & reg_list[15] != 1. */
17026 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
17028 /* - if (wback==1) reg_list[rn] == 0. */
17029 BFD_ASSERT (!wback || !restore_rn);
17031 /* - nb_registers > 8. */
17032 BFD_ASSERT (popcount (insn_all_registers) > 8);
17034 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
17036 /* In the following algorithm, we split this wide LDM using 2 LDM insn:
17037 - One with the 7 lowest registers (register mask 0x007F)
17038 This LDM will finally contain between 2 and 7 registers
17039 - One with the 7 highest registers (register mask 0xDF80)
17040 This ldm will finally contain between 2 and 7 registers. */
17041 insn_low_registers = insn_all_registers & 0x007F;
17042 insn_high_registers = insn_all_registers & 0xDF80;
17044 /* A spare register may be needed during this veneer to temporarily
17045 handle the base register. This register will be restored with
17046 the last LDM operation.
17047 The usable register may be any general purpose register (that excludes
17048 PC, SP, LR : register mask is 0x1FFF). */
17049 usable_register_mask = 0x1FFF;
17051 /* Generate the stub function. */
17052 if (!wback && !restore_pc && !restore_rn)
17054 /* Choose a Ri in the low-register-list that will be restored. */
17055 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
17058 current_stub_contents =
17059 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
17060 create_instruction_mov (ri, rn));
17062 /* LDMDB Ri!, {R-high-register-list}. */
17063 current_stub_contents =
17064 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17065 create_instruction_ldmdb
17066 (ri, /*wback=*/1, insn_high_registers));
17068 /* LDMDB Ri, {R-low-register-list}. */
17069 current_stub_contents =
17070 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17071 create_instruction_ldmdb
17072 (ri, /*wback=*/0, insn_low_registers));
17074 /* B initial_insn_addr+4. */
17075 current_stub_contents =
17076 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17077 create_instruction_branch_absolute
17078 (initial_insn_addr - current_stub_contents));
17080 else if (wback && !restore_pc && !restore_rn)
17082 /* LDMDB Rn!, {R-high-register-list}. */
17083 current_stub_contents =
17084 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17085 create_instruction_ldmdb
17086 (rn, /*wback=*/1, insn_high_registers));
17088 /* LDMDB Rn!, {R-low-register-list}. */
17089 current_stub_contents =
17090 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17091 create_instruction_ldmdb
17092 (rn, /*wback=*/1, insn_low_registers));
17094 /* B initial_insn_addr+4. */
17095 current_stub_contents =
17096 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17097 create_instruction_branch_absolute
17098 (initial_insn_addr - current_stub_contents));
17100 else if (!wback && restore_pc && !restore_rn)
17102 /* Choose a Ri in the high-register-list that will be restored. */
17103 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
17105 /* SUB Ri, Rn, #(4*nb_registers). */
17106 current_stub_contents =
17107 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17108 create_instruction_sub (ri, rn, (4 * nb_registers)));
17110 /* LDMIA Ri!, {R-low-register-list}. */
17111 current_stub_contents =
17112 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17113 create_instruction_ldmia
17114 (ri, /*wback=*/1, insn_low_registers));
17116 /* LDMIA Ri, {R-high-register-list}. */
17117 current_stub_contents =
17118 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17119 create_instruction_ldmia
17120 (ri, /*wback=*/0, insn_high_registers));
17122 else if (wback && restore_pc && !restore_rn)
17124 /* Choose a Ri in the high-register-list that will be restored. */
17125 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
17127 /* SUB Rn, Rn, #(4*nb_registers) */
17128 current_stub_contents =
17129 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17130 create_instruction_sub (rn, rn, (4 * nb_registers)));
17133 current_stub_contents =
17134 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
17135 create_instruction_mov (ri, rn));
17137 /* LDMIA Ri!, {R-low-register-list}. */
17138 current_stub_contents =
17139 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17140 create_instruction_ldmia
17141 (ri, /*wback=*/1, insn_low_registers));
17143 /* LDMIA Ri, {R-high-register-list}. */
17144 current_stub_contents =
17145 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17146 create_instruction_ldmia
17147 (ri, /*wback=*/0, insn_high_registers));
17149 else if (!wback && !restore_pc && restore_rn)
17152 if (!(insn_low_registers & (1 << rn)))
17154 /* Choose a Ri in the low-register-list that will be restored. */
17155 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
17158 current_stub_contents =
17159 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
17160 create_instruction_mov (ri, rn));
17163 /* LDMDB Ri!, {R-high-register-list}. */
17164 current_stub_contents =
17165 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17166 create_instruction_ldmdb
17167 (ri, /*wback=*/1, insn_high_registers));
17169 /* LDMDB Ri, {R-low-register-list}. */
17170 current_stub_contents =
17171 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17172 create_instruction_ldmdb
17173 (ri, /*wback=*/0, insn_low_registers));
17175 /* B initial_insn_addr+4. */
17176 current_stub_contents =
17177 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17178 create_instruction_branch_absolute
17179 (initial_insn_addr - current_stub_contents));
17181 else if (!wback && restore_pc && restore_rn)
17184 if (!(insn_high_registers & (1 << rn)))
17186 /* Choose a Ri in the high-register-list that will be restored. */
17187 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
17190 /* SUB Ri, Rn, #(4*nb_registers). */
17191 current_stub_contents =
17192 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17193 create_instruction_sub (ri, rn, (4 * nb_registers)));
17195 /* LDMIA Ri!, {R-low-register-list}. */
17196 current_stub_contents =
17197 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17198 create_instruction_ldmia
17199 (ri, /*wback=*/1, insn_low_registers));
17201 /* LDMIA Ri, {R-high-register-list}. */
17202 current_stub_contents =
17203 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17204 create_instruction_ldmia
17205 (ri, /*wback=*/0, insn_high_registers));
17207 else if (wback && restore_rn)
17209 /* The assembler should not have accepted to encode this. */
17210 BFD_ASSERT (0 && "Cannot patch an instruction that has an "
17211 "undefined behavior.\n");
17214 /* Fill the remaining of the stub with deterministic contents. */
17215 current_stub_contents =
17216 stm32l4xx_fill_stub_udf (htab, output_bfd,
17217 base_stub_contents, current_stub_contents,
17218 base_stub_contents +
17219 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
17224 stm32l4xx_create_replacing_stub_vldm (struct elf32_arm_link_hash_table * htab,
17226 const insn32 initial_insn,
17227 const bfd_byte *const initial_insn_addr,
17228 bfd_byte *const base_stub_contents)
17230 int num_words = ((unsigned int) initial_insn << 24) >> 24;
17231 bfd_byte *current_stub_contents = base_stub_contents;
17233 BFD_ASSERT (is_thumb2_vldm (initial_insn));
17235 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
17236 smaller than 8 words load sequences that do not cause the
17238 if (num_words <= 8)
17240 /* Untouched instruction. */
17241 current_stub_contents =
17242 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17245 /* B initial_insn_addr+4. */
17246 current_stub_contents =
17247 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17248 create_instruction_branch_absolute
17249 (initial_insn_addr - current_stub_contents));
17253 bfd_boolean is_dp = /* DP encoding. */
17254 (initial_insn & 0xfe100f00) == 0xec100b00;
17255 bfd_boolean is_ia_nobang = /* (IA without !). */
17256 (((initial_insn << 7) >> 28) & 0xd) == 0x4;
17257 bfd_boolean is_ia_bang = /* (IA with !) - includes VPOP. */
17258 (((initial_insn << 7) >> 28) & 0xd) == 0x5;
17259 bfd_boolean is_db_bang = /* (DB with !). */
17260 (((initial_insn << 7) >> 28) & 0xd) == 0x9;
17261 int base_reg = ((unsigned int) initial_insn << 12) >> 28;
17262 /* d = UInt (Vd:D);. */
17263 int first_reg = ((((unsigned int) initial_insn << 16) >> 28) << 1)
17264 | (((unsigned int)initial_insn << 9) >> 31);
17266 /* Compute the number of 8-words chunks needed to split. */
17267 int chunks = (num_words % 8) ? (num_words / 8 + 1) : (num_words / 8);
17270 /* The test coverage has been done assuming the following
17271 hypothesis that exactly one of the previous is_ predicates is
17273 BFD_ASSERT ( (is_ia_nobang ^ is_ia_bang ^ is_db_bang)
17274 && !(is_ia_nobang & is_ia_bang & is_db_bang));
17276 /* We treat the cutting of the words in one pass for all
17277 cases, then we emit the adjustments:
17280 -> vldm rx!, {8_words_or_less} for each needed 8_word
17281 -> sub rx, rx, #size (list)
17284 -> vldm rx!, {8_words_or_less} for each needed 8_word
17285 This also handles vpop instruction (when rx is sp)
17288 -> vldmb rx!, {8_words_or_less} for each needed 8_word. */
17289 for (chunk = 0; chunk < chunks; ++chunk)
17291 bfd_vma new_insn = 0;
17293 if (is_ia_nobang || is_ia_bang)
17295 new_insn = create_instruction_vldmia
17299 chunks - (chunk + 1) ?
17300 8 : num_words - chunk * 8,
17301 first_reg + chunk * 8);
17303 else if (is_db_bang)
17305 new_insn = create_instruction_vldmdb
17308 chunks - (chunk + 1) ?
17309 8 : num_words - chunk * 8,
17310 first_reg + chunk * 8);
17314 current_stub_contents =
17315 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17319 /* Only this case requires the base register compensation
17323 current_stub_contents =
17324 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17325 create_instruction_sub
17326 (base_reg, base_reg, 4*num_words));
17329 /* B initial_insn_addr+4. */
17330 current_stub_contents =
17331 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17332 create_instruction_branch_absolute
17333 (initial_insn_addr - current_stub_contents));
17336 /* Fill the remaining of the stub with deterministic contents. */
17337 current_stub_contents =
17338 stm32l4xx_fill_stub_udf (htab, output_bfd,
17339 base_stub_contents, current_stub_contents,
17340 base_stub_contents +
17341 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
17345 stm32l4xx_create_replacing_stub (struct elf32_arm_link_hash_table * htab,
17347 const insn32 wrong_insn,
17348 const bfd_byte *const wrong_insn_addr,
17349 bfd_byte *const stub_contents)
17351 if (is_thumb2_ldmia (wrong_insn))
17352 stm32l4xx_create_replacing_stub_ldmia (htab, output_bfd,
17353 wrong_insn, wrong_insn_addr,
17355 else if (is_thumb2_ldmdb (wrong_insn))
17356 stm32l4xx_create_replacing_stub_ldmdb (htab, output_bfd,
17357 wrong_insn, wrong_insn_addr,
17359 else if (is_thumb2_vldm (wrong_insn))
17360 stm32l4xx_create_replacing_stub_vldm (htab, output_bfd,
17361 wrong_insn, wrong_insn_addr,
17365 /* End of stm32l4xx work-around. */
17369 elf32_arm_add_relocation (bfd *output_bfd, struct bfd_link_info *info,
17370 asection *output_sec, Elf_Internal_Rela *rel)
17372 BFD_ASSERT (output_sec && rel);
17373 struct bfd_elf_section_reloc_data *output_reldata;
17374 struct elf32_arm_link_hash_table *htab;
17375 struct bfd_elf_section_data *oesd = elf_section_data (output_sec);
17376 Elf_Internal_Shdr *rel_hdr;
17381 rel_hdr = oesd->rel.hdr;
17382 output_reldata = &(oesd->rel);
17384 else if (oesd->rela.hdr)
17386 rel_hdr = oesd->rela.hdr;
17387 output_reldata = &(oesd->rela);
17394 bfd_byte *erel = rel_hdr->contents;
17395 erel += output_reldata->count * rel_hdr->sh_entsize;
17396 htab = elf32_arm_hash_table (info);
17397 SWAP_RELOC_OUT (htab) (output_bfd, rel, erel);
17398 output_reldata->count++;
17401 /* Do code byteswapping. Return FALSE afterwards so that the section is
17402 written out as normal. */
17405 elf32_arm_write_section (bfd *output_bfd,
17406 struct bfd_link_info *link_info,
17408 bfd_byte *contents)
17410 unsigned int mapcount, errcount;
17411 _arm_elf_section_data *arm_data;
17412 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
17413 elf32_arm_section_map *map;
17414 elf32_vfp11_erratum_list *errnode;
17415 elf32_stm32l4xx_erratum_list *stm32l4xx_errnode;
17418 bfd_vma offset = sec->output_section->vma + sec->output_offset;
17422 if (globals == NULL)
17425 /* If this section has not been allocated an _arm_elf_section_data
17426 structure then we cannot record anything. */
17427 arm_data = get_arm_elf_section_data (sec);
17428 if (arm_data == NULL)
17431 mapcount = arm_data->mapcount;
17432 map = arm_data->map;
17433 errcount = arm_data->erratumcount;
17437 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
17439 for (errnode = arm_data->erratumlist; errnode != 0;
17440 errnode = errnode->next)
17442 bfd_vma target = errnode->vma - offset;
17444 switch (errnode->type)
17446 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
17448 bfd_vma branch_to_veneer;
17449 /* Original condition code of instruction, plus bit mask for
17450 ARM B instruction. */
17451 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
17454 /* The instruction is before the label. */
17457 /* Above offset included in -4 below. */
17458 branch_to_veneer = errnode->u.b.veneer->vma
17459 - errnode->vma - 4;
17461 if ((signed) branch_to_veneer < -(1 << 25)
17462 || (signed) branch_to_veneer >= (1 << 25))
17463 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
17464 "range"), output_bfd);
17466 insn |= (branch_to_veneer >> 2) & 0xffffff;
17467 contents[endianflip ^ target] = insn & 0xff;
17468 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
17469 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
17470 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
17474 case VFP11_ERRATUM_ARM_VENEER:
17476 bfd_vma branch_from_veneer;
17479 /* Take size of veneer into account. */
17480 branch_from_veneer = errnode->u.v.branch->vma
17481 - errnode->vma - 12;
17483 if ((signed) branch_from_veneer < -(1 << 25)
17484 || (signed) branch_from_veneer >= (1 << 25))
17485 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
17486 "range"), output_bfd);
17488 /* Original instruction. */
17489 insn = errnode->u.v.branch->u.b.vfp_insn;
17490 contents[endianflip ^ target] = insn & 0xff;
17491 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
17492 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
17493 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
17495 /* Branch back to insn after original insn. */
17496 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
17497 contents[endianflip ^ (target + 4)] = insn & 0xff;
17498 contents[endianflip ^ (target + 5)] = (insn >> 8) & 0xff;
17499 contents[endianflip ^ (target + 6)] = (insn >> 16) & 0xff;
17500 contents[endianflip ^ (target + 7)] = (insn >> 24) & 0xff;
17510 if (arm_data->stm32l4xx_erratumcount != 0)
17512 for (stm32l4xx_errnode = arm_data->stm32l4xx_erratumlist;
17513 stm32l4xx_errnode != 0;
17514 stm32l4xx_errnode = stm32l4xx_errnode->next)
17516 bfd_vma target = stm32l4xx_errnode->vma - offset;
17518 switch (stm32l4xx_errnode->type)
17520 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
17523 bfd_vma branch_to_veneer =
17524 stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma;
17526 if ((signed) branch_to_veneer < -(1 << 24)
17527 || (signed) branch_to_veneer >= (1 << 24))
17529 bfd_vma out_of_range =
17530 ((signed) branch_to_veneer < -(1 << 24)) ?
17531 - branch_to_veneer - (1 << 24) :
17532 ((signed) branch_to_veneer >= (1 << 24)) ?
17533 branch_to_veneer - (1 << 24) : 0;
17535 (*_bfd_error_handler)
17536 (_("%B(%#x): error: Cannot create STM32L4XX veneer. "
17537 "Jump out of range by %ld bytes. "
17538 "Cannot encode branch instruction. "),
17540 (long) (stm32l4xx_errnode->vma - 4),
17545 insn = create_instruction_branch_absolute
17546 (stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma);
17548 /* The instruction is before the label. */
17551 put_thumb2_insn (globals, output_bfd,
17552 (bfd_vma) insn, contents + target);
17556 case STM32L4XX_ERRATUM_VENEER:
17559 bfd_byte * veneer_r;
17562 veneer = contents + target;
17564 + stm32l4xx_errnode->u.b.veneer->vma
17565 - stm32l4xx_errnode->vma - 4;
17567 if ((signed) (veneer_r - veneer -
17568 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE >
17569 STM32L4XX_ERRATUM_LDM_VENEER_SIZE ?
17570 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE :
17571 STM32L4XX_ERRATUM_LDM_VENEER_SIZE) < -(1 << 24)
17572 || (signed) (veneer_r - veneer) >= (1 << 24))
17574 (*_bfd_error_handler) (_("%B: error: Cannot create STM32L4XX "
17575 "veneer."), output_bfd);
17579 /* Original instruction. */
17580 insn = stm32l4xx_errnode->u.v.branch->u.b.insn;
17582 stm32l4xx_create_replacing_stub
17583 (globals, output_bfd, insn, (void*)veneer_r, (void*)veneer);
17593 if (arm_data->elf.this_hdr.sh_type == SHT_ARM_EXIDX)
17595 arm_unwind_table_edit *edit_node
17596 = arm_data->u.exidx.unwind_edit_list;
17597 /* Now, sec->size is the size of the section we will write. The original
17598 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
17599 markers) was sec->rawsize. (This isn't the case if we perform no
17600 edits, then rawsize will be zero and we should use size). */
17601 bfd_byte *edited_contents = (bfd_byte *) bfd_malloc (sec->size);
17602 unsigned int input_size = sec->rawsize ? sec->rawsize : sec->size;
17603 unsigned int in_index, out_index;
17604 bfd_vma add_to_offsets = 0;
17606 for (in_index = 0, out_index = 0; in_index * 8 < input_size || edit_node;)
17610 unsigned int edit_index = edit_node->index;
17612 if (in_index < edit_index && in_index * 8 < input_size)
17614 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
17615 contents + in_index * 8, add_to_offsets);
17619 else if (in_index == edit_index
17620 || (in_index * 8 >= input_size
17621 && edit_index == UINT_MAX))
17623 switch (edit_node->type)
17625 case DELETE_EXIDX_ENTRY:
17627 add_to_offsets += 8;
17630 case INSERT_EXIDX_CANTUNWIND_AT_END:
17632 asection *text_sec = edit_node->linked_section;
17633 bfd_vma text_offset = text_sec->output_section->vma
17634 + text_sec->output_offset
17636 bfd_vma exidx_offset = offset + out_index * 8;
17637 unsigned long prel31_offset;
17639 /* Note: this is meant to be equivalent to an
17640 R_ARM_PREL31 relocation. These synthetic
17641 EXIDX_CANTUNWIND markers are not relocated by the
17642 usual BFD method. */
17643 prel31_offset = (text_offset - exidx_offset)
17645 if (bfd_link_relocatable (link_info))
17647 /* Here relocation for new EXIDX_CANTUNWIND is
17648 created, so there is no need to
17649 adjust offset by hand. */
17650 prel31_offset = text_sec->output_offset
17653 /* New relocation entity. */
17654 asection *text_out = text_sec->output_section;
17655 Elf_Internal_Rela rel;
17657 rel.r_offset = exidx_offset;
17658 rel.r_info = ELF32_R_INFO (text_out->target_index,
17661 elf32_arm_add_relocation (output_bfd, link_info,
17662 sec->output_section,
17666 /* First address we can't unwind. */
17667 bfd_put_32 (output_bfd, prel31_offset,
17668 &edited_contents[out_index * 8]);
17670 /* Code for EXIDX_CANTUNWIND. */
17671 bfd_put_32 (output_bfd, 0x1,
17672 &edited_contents[out_index * 8 + 4]);
17675 add_to_offsets -= 8;
17680 edit_node = edit_node->next;
17685 /* No more edits, copy remaining entries verbatim. */
17686 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
17687 contents + in_index * 8, add_to_offsets);
17693 if (!(sec->flags & SEC_EXCLUDE) && !(sec->flags & SEC_NEVER_LOAD))
17694 bfd_set_section_contents (output_bfd, sec->output_section,
17696 (file_ptr) sec->output_offset, sec->size);
17701 /* Fix code to point to Cortex-A8 erratum stubs. */
17702 if (globals->fix_cortex_a8)
17704 struct a8_branch_to_stub_data data;
17706 data.writing_section = sec;
17707 data.contents = contents;
17709 bfd_hash_traverse (& globals->stub_hash_table, make_branch_to_a8_stub,
17716 if (globals->byteswap_code)
17718 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
17721 for (i = 0; i < mapcount; i++)
17723 if (i == mapcount - 1)
17726 end = map[i + 1].vma;
17728 switch (map[i].type)
17731 /* Byte swap code words. */
17732 while (ptr + 3 < end)
17734 tmp = contents[ptr];
17735 contents[ptr] = contents[ptr + 3];
17736 contents[ptr + 3] = tmp;
17737 tmp = contents[ptr + 1];
17738 contents[ptr + 1] = contents[ptr + 2];
17739 contents[ptr + 2] = tmp;
17745 /* Byte swap code halfwords. */
17746 while (ptr + 1 < end)
17748 tmp = contents[ptr];
17749 contents[ptr] = contents[ptr + 1];
17750 contents[ptr + 1] = tmp;
17756 /* Leave data alone. */
17764 arm_data->mapcount = -1;
17765 arm_data->mapsize = 0;
17766 arm_data->map = NULL;
17771 /* Mangle thumb function symbols as we read them in. */
17774 elf32_arm_swap_symbol_in (bfd * abfd,
17777 Elf_Internal_Sym *dst)
17779 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
17781 dst->st_target_internal = 0;
17783 /* New EABI objects mark thumb function symbols by setting the low bit of
17785 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
17786 || ELF_ST_TYPE (dst->st_info) == STT_GNU_IFUNC)
17788 if (dst->st_value & 1)
17790 dst->st_value &= ~(bfd_vma) 1;
17791 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal,
17792 ST_BRANCH_TO_THUMB);
17795 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_TO_ARM);
17797 else if (ELF_ST_TYPE (dst->st_info) == STT_ARM_TFUNC)
17799 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_FUNC);
17800 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_TO_THUMB);
17802 else if (ELF_ST_TYPE (dst->st_info) == STT_SECTION)
17803 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_LONG);
17805 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_UNKNOWN);
17811 /* Mangle thumb function symbols as we write them out. */
17814 elf32_arm_swap_symbol_out (bfd *abfd,
17815 const Elf_Internal_Sym *src,
17819 Elf_Internal_Sym newsym;
17821 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
17822 of the address set, as per the new EABI. We do this unconditionally
17823 because objcopy does not set the elf header flags until after
17824 it writes out the symbol table. */
17825 if (ARM_GET_SYM_BRANCH_TYPE (src->st_target_internal) == ST_BRANCH_TO_THUMB)
17828 if (ELF_ST_TYPE (src->st_info) != STT_GNU_IFUNC)
17829 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
17830 if (newsym.st_shndx != SHN_UNDEF)
17832 /* Do this only for defined symbols. At link type, the static
17833 linker will simulate the work of dynamic linker of resolving
17834 symbols and will carry over the thumbness of found symbols to
17835 the output symbol table. It's not clear how it happens, but
17836 the thumbness of undefined symbols can well be different at
17837 runtime, and writing '1' for them will be confusing for users
17838 and possibly for dynamic linker itself.
17840 newsym.st_value |= 1;
17845 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
17848 /* Add the PT_ARM_EXIDX program header. */
17851 elf32_arm_modify_segment_map (bfd *abfd,
17852 struct bfd_link_info *info ATTRIBUTE_UNUSED)
17854 struct elf_segment_map *m;
17857 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
17858 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
17860 /* If there is already a PT_ARM_EXIDX header, then we do not
17861 want to add another one. This situation arises when running
17862 "strip"; the input binary already has the header. */
17863 m = elf_seg_map (abfd);
17864 while (m && m->p_type != PT_ARM_EXIDX)
17868 m = (struct elf_segment_map *)
17869 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
17872 m->p_type = PT_ARM_EXIDX;
17874 m->sections[0] = sec;
17876 m->next = elf_seg_map (abfd);
17877 elf_seg_map (abfd) = m;
17884 /* We may add a PT_ARM_EXIDX program header. */
17887 elf32_arm_additional_program_headers (bfd *abfd,
17888 struct bfd_link_info *info ATTRIBUTE_UNUSED)
17892 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
17893 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
17899 /* Hook called by the linker routine which adds symbols from an object
17903 elf32_arm_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
17904 Elf_Internal_Sym *sym, const char **namep,
17905 flagword *flagsp, asection **secp, bfd_vma *valp)
17907 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
17908 && (abfd->flags & DYNAMIC) == 0
17909 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
17910 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
17912 if (elf32_arm_hash_table (info) == NULL)
17915 if (elf32_arm_hash_table (info)->vxworks_p
17916 && !elf_vxworks_add_symbol_hook (abfd, info, sym, namep,
17917 flagsp, secp, valp))
17923 /* We use this to override swap_symbol_in and swap_symbol_out. */
17924 const struct elf_size_info elf32_arm_size_info =
17926 sizeof (Elf32_External_Ehdr),
17927 sizeof (Elf32_External_Phdr),
17928 sizeof (Elf32_External_Shdr),
17929 sizeof (Elf32_External_Rel),
17930 sizeof (Elf32_External_Rela),
17931 sizeof (Elf32_External_Sym),
17932 sizeof (Elf32_External_Dyn),
17933 sizeof (Elf_External_Note),
17937 ELFCLASS32, EV_CURRENT,
17938 bfd_elf32_write_out_phdrs,
17939 bfd_elf32_write_shdrs_and_ehdr,
17940 bfd_elf32_checksum_contents,
17941 bfd_elf32_write_relocs,
17942 elf32_arm_swap_symbol_in,
17943 elf32_arm_swap_symbol_out,
17944 bfd_elf32_slurp_reloc_table,
17945 bfd_elf32_slurp_symbol_table,
17946 bfd_elf32_swap_dyn_in,
17947 bfd_elf32_swap_dyn_out,
17948 bfd_elf32_swap_reloc_in,
17949 bfd_elf32_swap_reloc_out,
17950 bfd_elf32_swap_reloca_in,
17951 bfd_elf32_swap_reloca_out
17955 read_code32 (const bfd *abfd, const bfd_byte *addr)
17957 /* V7 BE8 code is always little endian. */
17958 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
17959 return bfd_getl32 (addr);
17961 return bfd_get_32 (abfd, addr);
17965 read_code16 (const bfd *abfd, const bfd_byte *addr)
17967 /* V7 BE8 code is always little endian. */
17968 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
17969 return bfd_getl16 (addr);
17971 return bfd_get_16 (abfd, addr);
17974 /* Return size of plt0 entry starting at ADDR
17975 or (bfd_vma) -1 if size can not be determined. */
17978 elf32_arm_plt0_size (const bfd *abfd, const bfd_byte *addr)
17980 bfd_vma first_word;
17983 first_word = read_code32 (abfd, addr);
17985 if (first_word == elf32_arm_plt0_entry[0])
17986 plt0_size = 4 * ARRAY_SIZE (elf32_arm_plt0_entry);
17987 else if (first_word == elf32_thumb2_plt0_entry[0])
17988 plt0_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
17990 /* We don't yet handle this PLT format. */
17991 return (bfd_vma) -1;
17996 /* Return size of plt entry starting at offset OFFSET
17997 of plt section located at address START
17998 or (bfd_vma) -1 if size can not be determined. */
18001 elf32_arm_plt_size (const bfd *abfd, const bfd_byte *start, bfd_vma offset)
18003 bfd_vma first_insn;
18004 bfd_vma plt_size = 0;
18005 const bfd_byte *addr = start + offset;
18007 /* PLT entry size if fixed on Thumb-only platforms. */
18008 if (read_code32 (abfd, start) == elf32_thumb2_plt0_entry[0])
18009 return 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
18011 /* Respect Thumb stub if necessary. */
18012 if (read_code16 (abfd, addr) == elf32_arm_plt_thumb_stub[0])
18014 plt_size += 2 * ARRAY_SIZE(elf32_arm_plt_thumb_stub);
18017 /* Strip immediate from first add. */
18018 first_insn = read_code32 (abfd, addr + plt_size) & 0xffffff00;
18020 #ifdef FOUR_WORD_PLT
18021 if (first_insn == elf32_arm_plt_entry[0])
18022 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry);
18024 if (first_insn == elf32_arm_plt_entry_long[0])
18025 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_long);
18026 else if (first_insn == elf32_arm_plt_entry_short[0])
18027 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_short);
18030 /* We don't yet handle this PLT format. */
18031 return (bfd_vma) -1;
18036 /* Implementation is shamelessly borrowed from _bfd_elf_get_synthetic_symtab. */
18039 elf32_arm_get_synthetic_symtab (bfd *abfd,
18040 long symcount ATTRIBUTE_UNUSED,
18041 asymbol **syms ATTRIBUTE_UNUSED,
18051 Elf_Internal_Shdr *hdr;
18059 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
18062 if (dynsymcount <= 0)
18065 relplt = bfd_get_section_by_name (abfd, ".rel.plt");
18066 if (relplt == NULL)
18069 hdr = &elf_section_data (relplt)->this_hdr;
18070 if (hdr->sh_link != elf_dynsymtab (abfd)
18071 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
18074 plt = bfd_get_section_by_name (abfd, ".plt");
18078 if (!elf32_arm_size_info.slurp_reloc_table (abfd, relplt, dynsyms, TRUE))
18081 data = plt->contents;
18084 if (!bfd_get_full_section_contents(abfd, (asection *) plt, &data) || data == NULL)
18086 bfd_cache_section_contents((asection *) plt, data);
18089 count = relplt->size / hdr->sh_entsize;
18090 size = count * sizeof (asymbol);
18091 p = relplt->relocation;
18092 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
18094 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
18095 if (p->addend != 0)
18096 size += sizeof ("+0x") - 1 + 8;
18099 s = *ret = (asymbol *) bfd_malloc (size);
18103 offset = elf32_arm_plt0_size (abfd, data);
18104 if (offset == (bfd_vma) -1)
18107 names = (char *) (s + count);
18108 p = relplt->relocation;
18110 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
18114 bfd_vma plt_size = elf32_arm_plt_size (abfd, data, offset);
18115 if (plt_size == (bfd_vma) -1)
18118 *s = **p->sym_ptr_ptr;
18119 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
18120 we are defining a symbol, ensure one of them is set. */
18121 if ((s->flags & BSF_LOCAL) == 0)
18122 s->flags |= BSF_GLOBAL;
18123 s->flags |= BSF_SYNTHETIC;
18128 len = strlen ((*p->sym_ptr_ptr)->name);
18129 memcpy (names, (*p->sym_ptr_ptr)->name, len);
18131 if (p->addend != 0)
18135 memcpy (names, "+0x", sizeof ("+0x") - 1);
18136 names += sizeof ("+0x") - 1;
18137 bfd_sprintf_vma (abfd, buf, p->addend);
18138 for (a = buf; *a == '0'; ++a)
18141 memcpy (names, a, len);
18144 memcpy (names, "@plt", sizeof ("@plt"));
18145 names += sizeof ("@plt");
18147 offset += plt_size;
18154 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr * hdr)
18156 if (hdr->sh_flags & SHF_ARM_NOREAD)
18157 *flags |= SEC_ELF_NOREAD;
18162 elf32_arm_lookup_section_flags (char *flag_name)
18164 if (!strcmp (flag_name, "SHF_ARM_NOREAD"))
18165 return SHF_ARM_NOREAD;
18167 return SEC_NO_FLAGS;
18170 static unsigned int
18171 elf32_arm_count_additional_relocs (asection *sec)
18173 struct _arm_elf_section_data *arm_data;
18174 arm_data = get_arm_elf_section_data (sec);
18175 return arm_data->additional_reloc_count;
18178 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
18179 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
18180 FALSE otherwise. ISECTION is the best guess matching section from the
18181 input bfd IBFD, but it might be NULL. */
18184 elf32_arm_copy_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
18185 bfd *obfd ATTRIBUTE_UNUSED,
18186 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
18187 Elf_Internal_Shdr *osection)
18189 switch (osection->sh_type)
18191 case SHT_ARM_EXIDX:
18193 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
18194 Elf_Internal_Shdr **iheaders = elf_elfsections (ibfd);
18197 osection->sh_flags = SHF_ALLOC | SHF_LINK_ORDER;
18198 osection->sh_info = 0;
18200 /* The sh_link field must be set to the text section associated with
18201 this index section. Unfortunately the ARM EHABI does not specify
18202 exactly how to determine this association. Our caller does try
18203 to match up OSECTION with its corresponding input section however
18204 so that is a good first guess. */
18205 if (isection != NULL
18206 && osection->bfd_section != NULL
18207 && isection->bfd_section != NULL
18208 && isection->bfd_section->output_section != NULL
18209 && isection->bfd_section->output_section == osection->bfd_section
18210 && iheaders != NULL
18211 && isection->sh_link > 0
18212 && isection->sh_link < elf_numsections (ibfd)
18213 && iheaders[isection->sh_link]->bfd_section != NULL
18214 && iheaders[isection->sh_link]->bfd_section->output_section != NULL
18217 for (i = elf_numsections (obfd); i-- > 0;)
18218 if (oheaders[i]->bfd_section
18219 == iheaders[isection->sh_link]->bfd_section->output_section)
18225 /* Failing that we have to find a matching section ourselves. If
18226 we had the output section name available we could compare that
18227 with input section names. Unfortunately we don't. So instead
18228 we use a simple heuristic and look for the nearest executable
18229 section before this one. */
18230 for (i = elf_numsections (obfd); i-- > 0;)
18231 if (oheaders[i] == osection)
18237 if (oheaders[i]->sh_type == SHT_PROGBITS
18238 && (oheaders[i]->sh_flags & (SHF_ALLOC | SHF_EXECINSTR))
18239 == (SHF_ALLOC | SHF_EXECINSTR))
18245 osection->sh_link = i;
18246 /* If the text section was part of a group
18247 then the index section should be too. */
18248 if (oheaders[i]->sh_flags & SHF_GROUP)
18249 osection->sh_flags |= SHF_GROUP;
18255 case SHT_ARM_PREEMPTMAP:
18256 osection->sh_flags = SHF_ALLOC;
18259 case SHT_ARM_ATTRIBUTES:
18260 case SHT_ARM_DEBUGOVERLAY:
18261 case SHT_ARM_OVERLAYSECTION:
18269 /* Make sure that mapping symbols in object files are not removed via the
18270 "strip --strip-unneeded" tool. These symbols are needed in order to
18271 correctly generate interworking veneers, and for byte swapping code
18272 regions. Once an object file has been linked, it is safe to remove the
18273 symbols as they will no longer be needed. */
18276 elf32_arm_backend_symbol_processing (bfd *abfd, asymbol *sym)
18278 if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
18279 && sym->name != NULL
18280 && sym->section != bfd_abs_section_ptr
18281 && (strcmp (sym->name, "$a") == 0
18282 || strcmp (sym->name, "$t") == 0
18283 || strcmp (sym->name, "$d") == 0))
18284 sym->flags |= BSF_KEEP;
18287 #undef elf_backend_copy_special_section_fields
18288 #define elf_backend_copy_special_section_fields elf32_arm_copy_special_section_fields
18290 #define ELF_ARCH bfd_arch_arm
18291 #define ELF_TARGET_ID ARM_ELF_DATA
18292 #define ELF_MACHINE_CODE EM_ARM
18293 #ifdef __QNXTARGET__
18294 #define ELF_MAXPAGESIZE 0x1000
18296 #define ELF_MAXPAGESIZE 0x10000
18298 #define ELF_MINPAGESIZE 0x1000
18299 #define ELF_COMMONPAGESIZE 0x1000
18301 #define bfd_elf32_mkobject elf32_arm_mkobject
18303 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
18304 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
18305 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
18306 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
18307 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
18308 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
18309 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
18310 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
18311 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
18312 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
18313 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
18314 #define bfd_elf32_bfd_final_link elf32_arm_final_link
18315 #define bfd_elf32_get_synthetic_symtab elf32_arm_get_synthetic_symtab
18317 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
18318 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
18319 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
18320 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
18321 #define elf_backend_check_relocs elf32_arm_check_relocs
18322 #define elf_backend_relocate_section elf32_arm_relocate_section
18323 #define elf_backend_write_section elf32_arm_write_section
18324 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
18325 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
18326 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
18327 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
18328 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
18329 #define elf_backend_always_size_sections elf32_arm_always_size_sections
18330 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
18331 #define elf_backend_post_process_headers elf32_arm_post_process_headers
18332 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
18333 #define elf_backend_object_p elf32_arm_object_p
18334 #define elf_backend_fake_sections elf32_arm_fake_sections
18335 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
18336 #define elf_backend_final_write_processing elf32_arm_final_write_processing
18337 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
18338 #define elf_backend_size_info elf32_arm_size_info
18339 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
18340 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
18341 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
18342 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
18343 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
18344 #define elf_backend_count_additional_relocs elf32_arm_count_additional_relocs
18345 #define elf_backend_symbol_processing elf32_arm_backend_symbol_processing
18347 #define elf_backend_can_refcount 1
18348 #define elf_backend_can_gc_sections 1
18349 #define elf_backend_plt_readonly 1
18350 #define elf_backend_want_got_plt 1
18351 #define elf_backend_want_plt_sym 0
18352 #define elf_backend_may_use_rel_p 1
18353 #define elf_backend_may_use_rela_p 0
18354 #define elf_backend_default_use_rela_p 0
18356 #define elf_backend_got_header_size 12
18357 #define elf_backend_extern_protected_data 1
18359 #undef elf_backend_obj_attrs_vendor
18360 #define elf_backend_obj_attrs_vendor "aeabi"
18361 #undef elf_backend_obj_attrs_section
18362 #define elf_backend_obj_attrs_section ".ARM.attributes"
18363 #undef elf_backend_obj_attrs_arg_type
18364 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
18365 #undef elf_backend_obj_attrs_section_type
18366 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
18367 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
18368 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
18370 #undef elf_backend_section_flags
18371 #define elf_backend_section_flags elf32_arm_section_flags
18372 #undef elf_backend_lookup_section_flags_hook
18373 #define elf_backend_lookup_section_flags_hook elf32_arm_lookup_section_flags
18375 #include "elf32-target.h"
18377 /* Native Client targets. */
18379 #undef TARGET_LITTLE_SYM
18380 #define TARGET_LITTLE_SYM arm_elf32_nacl_le_vec
18381 #undef TARGET_LITTLE_NAME
18382 #define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
18383 #undef TARGET_BIG_SYM
18384 #define TARGET_BIG_SYM arm_elf32_nacl_be_vec
18385 #undef TARGET_BIG_NAME
18386 #define TARGET_BIG_NAME "elf32-bigarm-nacl"
18388 /* Like elf32_arm_link_hash_table_create -- but overrides
18389 appropriately for NaCl. */
18391 static struct bfd_link_hash_table *
18392 elf32_arm_nacl_link_hash_table_create (bfd *abfd)
18394 struct bfd_link_hash_table *ret;
18396 ret = elf32_arm_link_hash_table_create (abfd);
18399 struct elf32_arm_link_hash_table *htab
18400 = (struct elf32_arm_link_hash_table *) ret;
18404 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry);
18405 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry);
18410 /* Since NaCl doesn't use the ARM-specific unwind format, we don't
18411 really need to use elf32_arm_modify_segment_map. But we do it
18412 anyway just to reduce gratuitous differences with the stock ARM backend. */
18415 elf32_arm_nacl_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
18417 return (elf32_arm_modify_segment_map (abfd, info)
18418 && nacl_modify_segment_map (abfd, info));
18422 elf32_arm_nacl_final_write_processing (bfd *abfd, bfd_boolean linker)
18424 elf32_arm_final_write_processing (abfd, linker);
18425 nacl_final_write_processing (abfd, linker);
18429 elf32_arm_nacl_plt_sym_val (bfd_vma i, const asection *plt,
18430 const arelent *rel ATTRIBUTE_UNUSED)
18433 + 4 * (ARRAY_SIZE (elf32_arm_nacl_plt0_entry) +
18434 i * ARRAY_SIZE (elf32_arm_nacl_plt_entry));
18438 #define elf32_bed elf32_arm_nacl_bed
18439 #undef bfd_elf32_bfd_link_hash_table_create
18440 #define bfd_elf32_bfd_link_hash_table_create \
18441 elf32_arm_nacl_link_hash_table_create
18442 #undef elf_backend_plt_alignment
18443 #define elf_backend_plt_alignment 4
18444 #undef elf_backend_modify_segment_map
18445 #define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
18446 #undef elf_backend_modify_program_headers
18447 #define elf_backend_modify_program_headers nacl_modify_program_headers
18448 #undef elf_backend_final_write_processing
18449 #define elf_backend_final_write_processing elf32_arm_nacl_final_write_processing
18450 #undef bfd_elf32_get_synthetic_symtab
18451 #undef elf_backend_plt_sym_val
18452 #define elf_backend_plt_sym_val elf32_arm_nacl_plt_sym_val
18453 #undef elf_backend_copy_special_section_fields
18455 #undef ELF_MINPAGESIZE
18456 #undef ELF_COMMONPAGESIZE
18459 #include "elf32-target.h"
18461 /* Reset to defaults. */
18462 #undef elf_backend_plt_alignment
18463 #undef elf_backend_modify_segment_map
18464 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
18465 #undef elf_backend_modify_program_headers
18466 #undef elf_backend_final_write_processing
18467 #define elf_backend_final_write_processing elf32_arm_final_write_processing
18468 #undef ELF_MINPAGESIZE
18469 #define ELF_MINPAGESIZE 0x1000
18470 #undef ELF_COMMONPAGESIZE
18471 #define ELF_COMMONPAGESIZE 0x1000
18474 /* VxWorks Targets. */
18476 #undef TARGET_LITTLE_SYM
18477 #define TARGET_LITTLE_SYM arm_elf32_vxworks_le_vec
18478 #undef TARGET_LITTLE_NAME
18479 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
18480 #undef TARGET_BIG_SYM
18481 #define TARGET_BIG_SYM arm_elf32_vxworks_be_vec
18482 #undef TARGET_BIG_NAME
18483 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
18485 /* Like elf32_arm_link_hash_table_create -- but overrides
18486 appropriately for VxWorks. */
18488 static struct bfd_link_hash_table *
18489 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
18491 struct bfd_link_hash_table *ret;
18493 ret = elf32_arm_link_hash_table_create (abfd);
18496 struct elf32_arm_link_hash_table *htab
18497 = (struct elf32_arm_link_hash_table *) ret;
18499 htab->vxworks_p = 1;
18505 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
18507 elf32_arm_final_write_processing (abfd, linker);
18508 elf_vxworks_final_write_processing (abfd, linker);
18512 #define elf32_bed elf32_arm_vxworks_bed
18514 #undef bfd_elf32_bfd_link_hash_table_create
18515 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
18516 #undef elf_backend_final_write_processing
18517 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
18518 #undef elf_backend_emit_relocs
18519 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
18521 #undef elf_backend_may_use_rel_p
18522 #define elf_backend_may_use_rel_p 0
18523 #undef elf_backend_may_use_rela_p
18524 #define elf_backend_may_use_rela_p 1
18525 #undef elf_backend_default_use_rela_p
18526 #define elf_backend_default_use_rela_p 1
18527 #undef elf_backend_want_plt_sym
18528 #define elf_backend_want_plt_sym 1
18529 #undef ELF_MAXPAGESIZE
18530 #define ELF_MAXPAGESIZE 0x1000
18532 #include "elf32-target.h"
18535 /* Merge backend specific data from an object file to the output
18536 object file when linking. */
18539 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
18541 flagword out_flags;
18543 bfd_boolean flags_compatible = TRUE;
18546 /* Check if we have the same endianness. */
18547 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
18550 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
18553 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
18556 /* The input BFD must have had its flags initialised. */
18557 /* The following seems bogus to me -- The flags are initialized in
18558 the assembler but I don't think an elf_flags_init field is
18559 written into the object. */
18560 /* BFD_ASSERT (elf_flags_init (ibfd)); */
18562 in_flags = elf_elfheader (ibfd)->e_flags;
18563 out_flags = elf_elfheader (obfd)->e_flags;
18565 /* In theory there is no reason why we couldn't handle this. However
18566 in practice it isn't even close to working and there is no real
18567 reason to want it. */
18568 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
18569 && !(ibfd->flags & DYNAMIC)
18570 && (in_flags & EF_ARM_BE8))
18572 _bfd_error_handler (_("error: %B is already in final BE8 format"),
18577 if (!elf_flags_init (obfd))
18579 /* If the input is the default architecture and had the default
18580 flags then do not bother setting the flags for the output
18581 architecture, instead allow future merges to do this. If no
18582 future merges ever set these flags then they will retain their
18583 uninitialised values, which surprise surprise, correspond
18584 to the default values. */
18585 if (bfd_get_arch_info (ibfd)->the_default
18586 && elf_elfheader (ibfd)->e_flags == 0)
18589 elf_flags_init (obfd) = TRUE;
18590 elf_elfheader (obfd)->e_flags = in_flags;
18592 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
18593 && bfd_get_arch_info (obfd)->the_default)
18594 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
18599 /* Determine what should happen if the input ARM architecture
18600 does not match the output ARM architecture. */
18601 if (! bfd_arm_merge_machines (ibfd, obfd))
18604 /* Identical flags must be compatible. */
18605 if (in_flags == out_flags)
18608 /* Check to see if the input BFD actually contains any sections. If
18609 not, its flags may not have been initialised either, but it
18610 cannot actually cause any incompatiblity. Do not short-circuit
18611 dynamic objects; their section list may be emptied by
18612 elf_link_add_object_symbols.
18614 Also check to see if there are no code sections in the input.
18615 In this case there is no need to check for code specific flags.
18616 XXX - do we need to worry about floating-point format compatability
18617 in data sections ? */
18618 if (!(ibfd->flags & DYNAMIC))
18620 bfd_boolean null_input_bfd = TRUE;
18621 bfd_boolean only_data_sections = TRUE;
18623 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
18625 /* Ignore synthetic glue sections. */
18626 if (strcmp (sec->name, ".glue_7")
18627 && strcmp (sec->name, ".glue_7t"))
18629 if ((bfd_get_section_flags (ibfd, sec)
18630 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
18631 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
18632 only_data_sections = FALSE;
18634 null_input_bfd = FALSE;
18639 if (null_input_bfd || only_data_sections)
18643 /* Complain about various flag mismatches. */
18644 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
18645 EF_ARM_EABI_VERSION (out_flags)))
18648 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
18650 (in_flags & EF_ARM_EABIMASK) >> 24,
18651 (out_flags & EF_ARM_EABIMASK) >> 24);
18655 /* Not sure what needs to be checked for EABI versions >= 1. */
18656 /* VxWorks libraries do not use these flags. */
18657 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
18658 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
18659 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
18661 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
18664 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
18666 in_flags & EF_ARM_APCS_26 ? 26 : 32,
18667 out_flags & EF_ARM_APCS_26 ? 26 : 32);
18668 flags_compatible = FALSE;
18671 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
18673 if (in_flags & EF_ARM_APCS_FLOAT)
18675 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
18679 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
18682 flags_compatible = FALSE;
18685 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
18687 if (in_flags & EF_ARM_VFP_FLOAT)
18689 (_("error: %B uses VFP instructions, whereas %B does not"),
18693 (_("error: %B uses FPA instructions, whereas %B does not"),
18696 flags_compatible = FALSE;
18699 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
18701 if (in_flags & EF_ARM_MAVERICK_FLOAT)
18703 (_("error: %B uses Maverick instructions, whereas %B does not"),
18707 (_("error: %B does not use Maverick instructions, whereas %B does"),
18710 flags_compatible = FALSE;
18713 #ifdef EF_ARM_SOFT_FLOAT
18714 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
18716 /* We can allow interworking between code that is VFP format
18717 layout, and uses either soft float or integer regs for
18718 passing floating point arguments and results. We already
18719 know that the APCS_FLOAT flags match; similarly for VFP
18721 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
18722 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
18724 if (in_flags & EF_ARM_SOFT_FLOAT)
18726 (_("error: %B uses software FP, whereas %B uses hardware FP"),
18730 (_("error: %B uses hardware FP, whereas %B uses software FP"),
18733 flags_compatible = FALSE;
18738 /* Interworking mismatch is only a warning. */
18739 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
18741 if (in_flags & EF_ARM_INTERWORK)
18744 (_("Warning: %B supports interworking, whereas %B does not"),
18750 (_("Warning: %B does not support interworking, whereas %B does"),
18756 return flags_compatible;
18760 /* Symbian OS Targets. */
18762 #undef TARGET_LITTLE_SYM
18763 #define TARGET_LITTLE_SYM arm_elf32_symbian_le_vec
18764 #undef TARGET_LITTLE_NAME
18765 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
18766 #undef TARGET_BIG_SYM
18767 #define TARGET_BIG_SYM arm_elf32_symbian_be_vec
18768 #undef TARGET_BIG_NAME
18769 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
18771 /* Like elf32_arm_link_hash_table_create -- but overrides
18772 appropriately for Symbian OS. */
18774 static struct bfd_link_hash_table *
18775 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
18777 struct bfd_link_hash_table *ret;
18779 ret = elf32_arm_link_hash_table_create (abfd);
18782 struct elf32_arm_link_hash_table *htab
18783 = (struct elf32_arm_link_hash_table *)ret;
18784 /* There is no PLT header for Symbian OS. */
18785 htab->plt_header_size = 0;
18786 /* The PLT entries are each one instruction and one word. */
18787 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
18788 htab->symbian_p = 1;
18789 /* Symbian uses armv5t or above, so use_blx is always true. */
18791 htab->root.is_relocatable_executable = 1;
18796 static const struct bfd_elf_special_section
18797 elf32_arm_symbian_special_sections[] =
18799 /* In a BPABI executable, the dynamic linking sections do not go in
18800 the loadable read-only segment. The post-linker may wish to
18801 refer to these sections, but they are not part of the final
18803 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
18804 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
18805 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
18806 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
18807 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
18808 /* These sections do not need to be writable as the SymbianOS
18809 postlinker will arrange things so that no dynamic relocation is
18811 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
18812 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
18813 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
18814 { NULL, 0, 0, 0, 0 }
18818 elf32_arm_symbian_begin_write_processing (bfd *abfd,
18819 struct bfd_link_info *link_info)
18821 /* BPABI objects are never loaded directly by an OS kernel; they are
18822 processed by a postlinker first, into an OS-specific format. If
18823 the D_PAGED bit is set on the file, BFD will align segments on
18824 page boundaries, so that an OS can directly map the file. With
18825 BPABI objects, that just results in wasted space. In addition,
18826 because we clear the D_PAGED bit, map_sections_to_segments will
18827 recognize that the program headers should not be mapped into any
18828 loadable segment. */
18829 abfd->flags &= ~D_PAGED;
18830 elf32_arm_begin_write_processing (abfd, link_info);
18834 elf32_arm_symbian_modify_segment_map (bfd *abfd,
18835 struct bfd_link_info *info)
18837 struct elf_segment_map *m;
18840 /* BPABI shared libraries and executables should have a PT_DYNAMIC
18841 segment. However, because the .dynamic section is not marked
18842 with SEC_LOAD, the generic ELF code will not create such a
18844 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
18847 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
18848 if (m->p_type == PT_DYNAMIC)
18853 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
18854 m->next = elf_seg_map (abfd);
18855 elf_seg_map (abfd) = m;
18859 /* Also call the generic arm routine. */
18860 return elf32_arm_modify_segment_map (abfd, info);
18863 /* Return address for Ith PLT stub in section PLT, for relocation REL
18864 or (bfd_vma) -1 if it should not be included. */
18867 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
18868 const arelent *rel ATTRIBUTE_UNUSED)
18870 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
18874 #define elf32_bed elf32_arm_symbian_bed
18876 /* The dynamic sections are not allocated on SymbianOS; the postlinker
18877 will process them and then discard them. */
18878 #undef ELF_DYNAMIC_SEC_FLAGS
18879 #define ELF_DYNAMIC_SEC_FLAGS \
18880 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
18882 #undef elf_backend_emit_relocs
18884 #undef bfd_elf32_bfd_link_hash_table_create
18885 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
18886 #undef elf_backend_special_sections
18887 #define elf_backend_special_sections elf32_arm_symbian_special_sections
18888 #undef elf_backend_begin_write_processing
18889 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
18890 #undef elf_backend_final_write_processing
18891 #define elf_backend_final_write_processing elf32_arm_final_write_processing
18893 #undef elf_backend_modify_segment_map
18894 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
18896 /* There is no .got section for BPABI objects, and hence no header. */
18897 #undef elf_backend_got_header_size
18898 #define elf_backend_got_header_size 0
18900 /* Similarly, there is no .got.plt section. */
18901 #undef elf_backend_want_got_plt
18902 #define elf_backend_want_got_plt 0
18904 #undef elf_backend_plt_sym_val
18905 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
18907 #undef elf_backend_may_use_rel_p
18908 #define elf_backend_may_use_rel_p 1
18909 #undef elf_backend_may_use_rela_p
18910 #define elf_backend_may_use_rela_p 0
18911 #undef elf_backend_default_use_rela_p
18912 #define elf_backend_default_use_rela_p 0
18913 #undef elf_backend_want_plt_sym
18914 #define elf_backend_want_plt_sym 0
18915 #undef ELF_MAXPAGESIZE
18916 #define ELF_MAXPAGESIZE 0x8000
18918 #include "elf32-target.h"