1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "libiberty.h"
29 #include "elf-vxworks.h"
32 /* Return the relocation section associated with NAME. HTAB is the
33 bfd's elf32_arm_link_hash_entry. */
34 #define RELOC_SECTION(HTAB, NAME) \
35 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37 /* Return size of a relocation entry. HTAB is the bfd's
38 elf32_arm_link_hash_entry. */
39 #define RELOC_SIZE(HTAB) \
41 ? sizeof (Elf32_External_Rel) \
42 : sizeof (Elf32_External_Rela))
44 /* Return function to swap relocations in. HTAB is the bfd's
45 elf32_arm_link_hash_entry. */
46 #define SWAP_RELOC_IN(HTAB) \
48 ? bfd_elf32_swap_reloc_in \
49 : bfd_elf32_swap_reloca_in)
51 /* Return function to swap relocations out. HTAB is the bfd's
52 elf32_arm_link_hash_entry. */
53 #define SWAP_RELOC_OUT(HTAB) \
55 ? bfd_elf32_swap_reloc_out \
56 : bfd_elf32_swap_reloca_out)
58 #define elf_info_to_howto 0
59 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61 #define ARM_ELF_ABI_VERSION 0
62 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64 static bfd_boolean elf32_arm_write_section (bfd *output_bfd,
65 struct bfd_link_info *link_info,
69 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
70 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
73 static reloc_howto_type elf32_arm_howto_table_1[] =
76 HOWTO (R_ARM_NONE, /* type */
78 0, /* size (0 = byte, 1 = short, 2 = long) */
80 FALSE, /* pc_relative */
82 complain_overflow_dont,/* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_ARM_NONE", /* name */
85 FALSE, /* partial_inplace */
88 FALSE), /* pcrel_offset */
90 HOWTO (R_ARM_PC24, /* type */
92 2, /* size (0 = byte, 1 = short, 2 = long) */
94 TRUE, /* pc_relative */
96 complain_overflow_signed,/* complain_on_overflow */
97 bfd_elf_generic_reloc, /* special_function */
98 "R_ARM_PC24", /* name */
99 FALSE, /* partial_inplace */
100 0x00ffffff, /* src_mask */
101 0x00ffffff, /* dst_mask */
102 TRUE), /* pcrel_offset */
104 /* 32 bit absolute */
105 HOWTO (R_ARM_ABS32, /* type */
107 2, /* size (0 = byte, 1 = short, 2 = long) */
109 FALSE, /* pc_relative */
111 complain_overflow_bitfield,/* complain_on_overflow */
112 bfd_elf_generic_reloc, /* special_function */
113 "R_ARM_ABS32", /* name */
114 FALSE, /* partial_inplace */
115 0xffffffff, /* src_mask */
116 0xffffffff, /* dst_mask */
117 FALSE), /* pcrel_offset */
119 /* standard 32bit pc-relative reloc */
120 HOWTO (R_ARM_REL32, /* type */
122 2, /* size (0 = byte, 1 = short, 2 = long) */
124 TRUE, /* pc_relative */
126 complain_overflow_bitfield,/* complain_on_overflow */
127 bfd_elf_generic_reloc, /* special_function */
128 "R_ARM_REL32", /* name */
129 FALSE, /* partial_inplace */
130 0xffffffff, /* src_mask */
131 0xffffffff, /* dst_mask */
132 TRUE), /* pcrel_offset */
134 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
135 HOWTO (R_ARM_LDR_PC_G0, /* type */
137 0, /* size (0 = byte, 1 = short, 2 = long) */
139 TRUE, /* pc_relative */
141 complain_overflow_dont,/* complain_on_overflow */
142 bfd_elf_generic_reloc, /* special_function */
143 "R_ARM_LDR_PC_G0", /* name */
144 FALSE, /* partial_inplace */
145 0xffffffff, /* src_mask */
146 0xffffffff, /* dst_mask */
147 TRUE), /* pcrel_offset */
149 /* 16 bit absolute */
150 HOWTO (R_ARM_ABS16, /* type */
152 1, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE, /* pc_relative */
156 complain_overflow_bitfield,/* complain_on_overflow */
157 bfd_elf_generic_reloc, /* special_function */
158 "R_ARM_ABS16", /* name */
159 FALSE, /* partial_inplace */
160 0x0000ffff, /* src_mask */
161 0x0000ffff, /* dst_mask */
162 FALSE), /* pcrel_offset */
164 /* 12 bit absolute */
165 HOWTO (R_ARM_ABS12, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 FALSE, /* pc_relative */
171 complain_overflow_bitfield,/* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_ARM_ABS12", /* name */
174 FALSE, /* partial_inplace */
175 0x00000fff, /* src_mask */
176 0x00000fff, /* dst_mask */
177 FALSE), /* pcrel_offset */
179 HOWTO (R_ARM_THM_ABS5, /* type */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
183 FALSE, /* pc_relative */
185 complain_overflow_bitfield,/* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_ARM_THM_ABS5", /* name */
188 FALSE, /* partial_inplace */
189 0x000007e0, /* src_mask */
190 0x000007e0, /* dst_mask */
191 FALSE), /* pcrel_offset */
194 HOWTO (R_ARM_ABS8, /* type */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
198 FALSE, /* pc_relative */
200 complain_overflow_bitfield,/* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_ARM_ABS8", /* name */
203 FALSE, /* partial_inplace */
204 0x000000ff, /* src_mask */
205 0x000000ff, /* dst_mask */
206 FALSE), /* pcrel_offset */
208 HOWTO (R_ARM_SBREL32, /* type */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
212 FALSE, /* pc_relative */
214 complain_overflow_dont,/* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_ARM_SBREL32", /* name */
217 FALSE, /* partial_inplace */
218 0xffffffff, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
222 HOWTO (R_ARM_THM_CALL, /* type */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
226 TRUE, /* pc_relative */
228 complain_overflow_signed,/* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_ARM_THM_CALL", /* name */
231 FALSE, /* partial_inplace */
232 0x07ff07ff, /* src_mask */
233 0x07ff07ff, /* dst_mask */
234 TRUE), /* pcrel_offset */
236 HOWTO (R_ARM_THM_PC8, /* type */
238 1, /* size (0 = byte, 1 = short, 2 = long) */
240 TRUE, /* pc_relative */
242 complain_overflow_signed,/* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_ARM_THM_PC8", /* name */
245 FALSE, /* partial_inplace */
246 0x000000ff, /* src_mask */
247 0x000000ff, /* dst_mask */
248 TRUE), /* pcrel_offset */
250 HOWTO (R_ARM_BREL_ADJ, /* type */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
254 FALSE, /* pc_relative */
256 complain_overflow_signed,/* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_ARM_BREL_ADJ", /* name */
259 FALSE, /* partial_inplace */
260 0xffffffff, /* src_mask */
261 0xffffffff, /* dst_mask */
262 FALSE), /* pcrel_offset */
264 HOWTO (R_ARM_TLS_DESC, /* type */
266 2, /* size (0 = byte, 1 = short, 2 = long) */
268 FALSE, /* pc_relative */
270 complain_overflow_bitfield,/* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_ARM_TLS_DESC", /* name */
273 FALSE, /* partial_inplace */
274 0xffffffff, /* src_mask */
275 0xffffffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
278 HOWTO (R_ARM_THM_SWI8, /* type */
280 0, /* size (0 = byte, 1 = short, 2 = long) */
282 FALSE, /* pc_relative */
284 complain_overflow_signed,/* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_ARM_SWI8", /* name */
287 FALSE, /* partial_inplace */
288 0x00000000, /* src_mask */
289 0x00000000, /* dst_mask */
290 FALSE), /* pcrel_offset */
292 /* BLX instruction for the ARM. */
293 HOWTO (R_ARM_XPC25, /* type */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
297 TRUE, /* pc_relative */
299 complain_overflow_signed,/* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_ARM_XPC25", /* name */
302 FALSE, /* partial_inplace */
303 0x00ffffff, /* src_mask */
304 0x00ffffff, /* dst_mask */
305 TRUE), /* pcrel_offset */
307 /* BLX instruction for the Thumb. */
308 HOWTO (R_ARM_THM_XPC22, /* type */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
312 TRUE, /* pc_relative */
314 complain_overflow_signed,/* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_ARM_THM_XPC22", /* name */
317 FALSE, /* partial_inplace */
318 0x07ff07ff, /* src_mask */
319 0x07ff07ff, /* dst_mask */
320 TRUE), /* pcrel_offset */
322 /* Dynamic TLS relocations. */
324 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
328 FALSE, /* pc_relative */
330 complain_overflow_bitfield,/* complain_on_overflow */
331 bfd_elf_generic_reloc, /* special_function */
332 "R_ARM_TLS_DTPMOD32", /* name */
333 TRUE, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 FALSE), /* pcrel_offset */
338 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE, /* pc_relative */
344 complain_overflow_bitfield,/* complain_on_overflow */
345 bfd_elf_generic_reloc, /* special_function */
346 "R_ARM_TLS_DTPOFF32", /* name */
347 TRUE, /* partial_inplace */
348 0xffffffff, /* src_mask */
349 0xffffffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
352 HOWTO (R_ARM_TLS_TPOFF32, /* type */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
356 FALSE, /* pc_relative */
358 complain_overflow_bitfield,/* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_ARM_TLS_TPOFF32", /* name */
361 TRUE, /* partial_inplace */
362 0xffffffff, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
366 /* Relocs used in ARM Linux */
368 HOWTO (R_ARM_COPY, /* type */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
372 FALSE, /* pc_relative */
374 complain_overflow_bitfield,/* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_ARM_COPY", /* name */
377 TRUE, /* partial_inplace */
378 0xffffffff, /* src_mask */
379 0xffffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
382 HOWTO (R_ARM_GLOB_DAT, /* type */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
386 FALSE, /* pc_relative */
388 complain_overflow_bitfield,/* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_ARM_GLOB_DAT", /* name */
391 TRUE, /* partial_inplace */
392 0xffffffff, /* src_mask */
393 0xffffffff, /* dst_mask */
394 FALSE), /* pcrel_offset */
396 HOWTO (R_ARM_JUMP_SLOT, /* type */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
400 FALSE, /* pc_relative */
402 complain_overflow_bitfield,/* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_ARM_JUMP_SLOT", /* name */
405 TRUE, /* partial_inplace */
406 0xffffffff, /* src_mask */
407 0xffffffff, /* dst_mask */
408 FALSE), /* pcrel_offset */
410 HOWTO (R_ARM_RELATIVE, /* type */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
414 FALSE, /* pc_relative */
416 complain_overflow_bitfield,/* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_ARM_RELATIVE", /* name */
419 TRUE, /* partial_inplace */
420 0xffffffff, /* src_mask */
421 0xffffffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
424 HOWTO (R_ARM_GOTOFF32, /* type */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
428 FALSE, /* pc_relative */
430 complain_overflow_bitfield,/* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 "R_ARM_GOTOFF32", /* name */
433 TRUE, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 FALSE), /* pcrel_offset */
438 HOWTO (R_ARM_GOTPC, /* type */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
442 TRUE, /* pc_relative */
444 complain_overflow_bitfield,/* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 "R_ARM_GOTPC", /* name */
447 TRUE, /* partial_inplace */
448 0xffffffff, /* src_mask */
449 0xffffffff, /* dst_mask */
450 TRUE), /* pcrel_offset */
452 HOWTO (R_ARM_GOT32, /* type */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE, /* pc_relative */
458 complain_overflow_bitfield,/* complain_on_overflow */
459 bfd_elf_generic_reloc, /* special_function */
460 "R_ARM_GOT32", /* name */
461 TRUE, /* partial_inplace */
462 0xffffffff, /* src_mask */
463 0xffffffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
466 HOWTO (R_ARM_PLT32, /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 TRUE, /* pc_relative */
472 complain_overflow_bitfield,/* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_ARM_PLT32", /* name */
475 FALSE, /* partial_inplace */
476 0x00ffffff, /* src_mask */
477 0x00ffffff, /* dst_mask */
478 TRUE), /* pcrel_offset */
480 HOWTO (R_ARM_CALL, /* type */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
484 TRUE, /* pc_relative */
486 complain_overflow_signed,/* complain_on_overflow */
487 bfd_elf_generic_reloc, /* special_function */
488 "R_ARM_CALL", /* name */
489 FALSE, /* partial_inplace */
490 0x00ffffff, /* src_mask */
491 0x00ffffff, /* dst_mask */
492 TRUE), /* pcrel_offset */
494 HOWTO (R_ARM_JUMP24, /* type */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
498 TRUE, /* pc_relative */
500 complain_overflow_signed,/* complain_on_overflow */
501 bfd_elf_generic_reloc, /* special_function */
502 "R_ARM_JUMP24", /* name */
503 FALSE, /* partial_inplace */
504 0x00ffffff, /* src_mask */
505 0x00ffffff, /* dst_mask */
506 TRUE), /* pcrel_offset */
508 HOWTO (R_ARM_THM_JUMP24, /* type */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
512 TRUE, /* pc_relative */
514 complain_overflow_signed,/* complain_on_overflow */
515 bfd_elf_generic_reloc, /* special_function */
516 "R_ARM_THM_JUMP24", /* name */
517 FALSE, /* partial_inplace */
518 0x07ff2fff, /* src_mask */
519 0x07ff2fff, /* dst_mask */
520 TRUE), /* pcrel_offset */
522 HOWTO (R_ARM_BASE_ABS, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 FALSE, /* pc_relative */
528 complain_overflow_dont,/* complain_on_overflow */
529 bfd_elf_generic_reloc, /* special_function */
530 "R_ARM_BASE_ABS", /* name */
531 FALSE, /* partial_inplace */
532 0xffffffff, /* src_mask */
533 0xffffffff, /* dst_mask */
534 FALSE), /* pcrel_offset */
536 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
538 2, /* size (0 = byte, 1 = short, 2 = long) */
540 TRUE, /* pc_relative */
542 complain_overflow_dont,/* complain_on_overflow */
543 bfd_elf_generic_reloc, /* special_function */
544 "R_ARM_ALU_PCREL_7_0", /* name */
545 FALSE, /* partial_inplace */
546 0x00000fff, /* src_mask */
547 0x00000fff, /* dst_mask */
548 TRUE), /* pcrel_offset */
550 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
554 TRUE, /* pc_relative */
556 complain_overflow_dont,/* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_ARM_ALU_PCREL_15_8",/* name */
559 FALSE, /* partial_inplace */
560 0x00000fff, /* src_mask */
561 0x00000fff, /* dst_mask */
562 TRUE), /* pcrel_offset */
564 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
568 TRUE, /* pc_relative */
570 complain_overflow_dont,/* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 "R_ARM_ALU_PCREL_23_15",/* name */
573 FALSE, /* partial_inplace */
574 0x00000fff, /* src_mask */
575 0x00000fff, /* dst_mask */
576 TRUE), /* pcrel_offset */
578 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
582 FALSE, /* pc_relative */
584 complain_overflow_dont,/* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_ARM_LDR_SBREL_11_0",/* name */
587 FALSE, /* partial_inplace */
588 0x00000fff, /* src_mask */
589 0x00000fff, /* dst_mask */
590 FALSE), /* pcrel_offset */
592 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
596 FALSE, /* pc_relative */
598 complain_overflow_dont,/* complain_on_overflow */
599 bfd_elf_generic_reloc, /* special_function */
600 "R_ARM_ALU_SBREL_19_12",/* name */
601 FALSE, /* partial_inplace */
602 0x000ff000, /* src_mask */
603 0x000ff000, /* dst_mask */
604 FALSE), /* pcrel_offset */
606 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
610 FALSE, /* pc_relative */
612 complain_overflow_dont,/* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_ARM_ALU_SBREL_27_20",/* name */
615 FALSE, /* partial_inplace */
616 0x0ff00000, /* src_mask */
617 0x0ff00000, /* dst_mask */
618 FALSE), /* pcrel_offset */
620 HOWTO (R_ARM_TARGET1, /* type */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
624 FALSE, /* pc_relative */
626 complain_overflow_dont,/* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_ARM_TARGET1", /* name */
629 FALSE, /* partial_inplace */
630 0xffffffff, /* src_mask */
631 0xffffffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
634 HOWTO (R_ARM_ROSEGREL32, /* type */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
638 FALSE, /* pc_relative */
640 complain_overflow_dont,/* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_ARM_ROSEGREL32", /* name */
643 FALSE, /* partial_inplace */
644 0xffffffff, /* src_mask */
645 0xffffffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
648 HOWTO (R_ARM_V4BX, /* type */
650 2, /* size (0 = byte, 1 = short, 2 = long) */
652 FALSE, /* pc_relative */
654 complain_overflow_dont,/* complain_on_overflow */
655 bfd_elf_generic_reloc, /* special_function */
656 "R_ARM_V4BX", /* name */
657 FALSE, /* partial_inplace */
658 0xffffffff, /* src_mask */
659 0xffffffff, /* dst_mask */
660 FALSE), /* pcrel_offset */
662 HOWTO (R_ARM_TARGET2, /* type */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
666 FALSE, /* pc_relative */
668 complain_overflow_signed,/* complain_on_overflow */
669 bfd_elf_generic_reloc, /* special_function */
670 "R_ARM_TARGET2", /* name */
671 FALSE, /* partial_inplace */
672 0xffffffff, /* src_mask */
673 0xffffffff, /* dst_mask */
674 TRUE), /* pcrel_offset */
676 HOWTO (R_ARM_PREL31, /* type */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
680 TRUE, /* pc_relative */
682 complain_overflow_signed,/* complain_on_overflow */
683 bfd_elf_generic_reloc, /* special_function */
684 "R_ARM_PREL31", /* name */
685 FALSE, /* partial_inplace */
686 0x7fffffff, /* src_mask */
687 0x7fffffff, /* dst_mask */
688 TRUE), /* pcrel_offset */
690 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
694 FALSE, /* pc_relative */
696 complain_overflow_dont,/* complain_on_overflow */
697 bfd_elf_generic_reloc, /* special_function */
698 "R_ARM_MOVW_ABS_NC", /* name */
699 FALSE, /* partial_inplace */
700 0x000f0fff, /* src_mask */
701 0x000f0fff, /* dst_mask */
702 FALSE), /* pcrel_offset */
704 HOWTO (R_ARM_MOVT_ABS, /* type */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
708 FALSE, /* pc_relative */
710 complain_overflow_bitfield,/* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_ARM_MOVT_ABS", /* name */
713 FALSE, /* partial_inplace */
714 0x000f0fff, /* src_mask */
715 0x000f0fff, /* dst_mask */
716 FALSE), /* pcrel_offset */
718 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
722 TRUE, /* pc_relative */
724 complain_overflow_dont,/* complain_on_overflow */
725 bfd_elf_generic_reloc, /* special_function */
726 "R_ARM_MOVW_PREL_NC", /* name */
727 FALSE, /* partial_inplace */
728 0x000f0fff, /* src_mask */
729 0x000f0fff, /* dst_mask */
730 TRUE), /* pcrel_offset */
732 HOWTO (R_ARM_MOVT_PREL, /* type */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
736 TRUE, /* pc_relative */
738 complain_overflow_bitfield,/* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_ARM_MOVT_PREL", /* name */
741 FALSE, /* partial_inplace */
742 0x000f0fff, /* src_mask */
743 0x000f0fff, /* dst_mask */
744 TRUE), /* pcrel_offset */
746 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
748 2, /* size (0 = byte, 1 = short, 2 = long) */
750 FALSE, /* pc_relative */
752 complain_overflow_dont,/* complain_on_overflow */
753 bfd_elf_generic_reloc, /* special_function */
754 "R_ARM_THM_MOVW_ABS_NC",/* name */
755 FALSE, /* partial_inplace */
756 0x040f70ff, /* src_mask */
757 0x040f70ff, /* dst_mask */
758 FALSE), /* pcrel_offset */
760 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
764 FALSE, /* pc_relative */
766 complain_overflow_bitfield,/* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_ARM_THM_MOVT_ABS", /* name */
769 FALSE, /* partial_inplace */
770 0x040f70ff, /* src_mask */
771 0x040f70ff, /* dst_mask */
772 FALSE), /* pcrel_offset */
774 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
778 TRUE, /* pc_relative */
780 complain_overflow_dont,/* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_ARM_THM_MOVW_PREL_NC",/* name */
783 FALSE, /* partial_inplace */
784 0x040f70ff, /* src_mask */
785 0x040f70ff, /* dst_mask */
786 TRUE), /* pcrel_offset */
788 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
792 TRUE, /* pc_relative */
794 complain_overflow_bitfield,/* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_ARM_THM_MOVT_PREL", /* name */
797 FALSE, /* partial_inplace */
798 0x040f70ff, /* src_mask */
799 0x040f70ff, /* dst_mask */
800 TRUE), /* pcrel_offset */
802 HOWTO (R_ARM_THM_JUMP19, /* type */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
806 TRUE, /* pc_relative */
808 complain_overflow_signed,/* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_ARM_THM_JUMP19", /* name */
811 FALSE, /* partial_inplace */
812 0x043f2fff, /* src_mask */
813 0x043f2fff, /* dst_mask */
814 TRUE), /* pcrel_offset */
816 HOWTO (R_ARM_THM_JUMP6, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 TRUE, /* pc_relative */
822 complain_overflow_unsigned,/* complain_on_overflow */
823 bfd_elf_generic_reloc, /* special_function */
824 "R_ARM_THM_JUMP6", /* name */
825 FALSE, /* partial_inplace */
826 0x02f8, /* src_mask */
827 0x02f8, /* dst_mask */
828 TRUE), /* pcrel_offset */
830 /* These are declared as 13-bit signed relocations because we can
831 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
833 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
835 2, /* size (0 = byte, 1 = short, 2 = long) */
837 TRUE, /* pc_relative */
839 complain_overflow_dont,/* complain_on_overflow */
840 bfd_elf_generic_reloc, /* special_function */
841 "R_ARM_THM_ALU_PREL_11_0",/* name */
842 FALSE, /* partial_inplace */
843 0xffffffff, /* src_mask */
844 0xffffffff, /* dst_mask */
845 TRUE), /* pcrel_offset */
847 HOWTO (R_ARM_THM_PC12, /* type */
849 2, /* size (0 = byte, 1 = short, 2 = long) */
851 TRUE, /* pc_relative */
853 complain_overflow_dont,/* complain_on_overflow */
854 bfd_elf_generic_reloc, /* special_function */
855 "R_ARM_THM_PC12", /* name */
856 FALSE, /* partial_inplace */
857 0xffffffff, /* src_mask */
858 0xffffffff, /* dst_mask */
859 TRUE), /* pcrel_offset */
861 HOWTO (R_ARM_ABS32_NOI, /* type */
863 2, /* size (0 = byte, 1 = short, 2 = long) */
865 FALSE, /* pc_relative */
867 complain_overflow_dont,/* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_ARM_ABS32_NOI", /* name */
870 FALSE, /* partial_inplace */
871 0xffffffff, /* src_mask */
872 0xffffffff, /* dst_mask */
873 FALSE), /* pcrel_offset */
875 HOWTO (R_ARM_REL32_NOI, /* type */
877 2, /* size (0 = byte, 1 = short, 2 = long) */
879 TRUE, /* pc_relative */
881 complain_overflow_dont,/* complain_on_overflow */
882 bfd_elf_generic_reloc, /* special_function */
883 "R_ARM_REL32_NOI", /* name */
884 FALSE, /* partial_inplace */
885 0xffffffff, /* src_mask */
886 0xffffffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
889 /* Group relocations. */
891 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
893 2, /* size (0 = byte, 1 = short, 2 = long) */
895 TRUE, /* pc_relative */
897 complain_overflow_dont,/* complain_on_overflow */
898 bfd_elf_generic_reloc, /* special_function */
899 "R_ARM_ALU_PC_G0_NC", /* name */
900 FALSE, /* partial_inplace */
901 0xffffffff, /* src_mask */
902 0xffffffff, /* dst_mask */
903 TRUE), /* pcrel_offset */
905 HOWTO (R_ARM_ALU_PC_G0, /* type */
907 2, /* size (0 = byte, 1 = short, 2 = long) */
909 TRUE, /* pc_relative */
911 complain_overflow_dont,/* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_ARM_ALU_PC_G0", /* name */
914 FALSE, /* partial_inplace */
915 0xffffffff, /* src_mask */
916 0xffffffff, /* dst_mask */
917 TRUE), /* pcrel_offset */
919 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
921 2, /* size (0 = byte, 1 = short, 2 = long) */
923 TRUE, /* pc_relative */
925 complain_overflow_dont,/* complain_on_overflow */
926 bfd_elf_generic_reloc, /* special_function */
927 "R_ARM_ALU_PC_G1_NC", /* name */
928 FALSE, /* partial_inplace */
929 0xffffffff, /* src_mask */
930 0xffffffff, /* dst_mask */
931 TRUE), /* pcrel_offset */
933 HOWTO (R_ARM_ALU_PC_G1, /* type */
935 2, /* size (0 = byte, 1 = short, 2 = long) */
937 TRUE, /* pc_relative */
939 complain_overflow_dont,/* complain_on_overflow */
940 bfd_elf_generic_reloc, /* special_function */
941 "R_ARM_ALU_PC_G1", /* name */
942 FALSE, /* partial_inplace */
943 0xffffffff, /* src_mask */
944 0xffffffff, /* dst_mask */
945 TRUE), /* pcrel_offset */
947 HOWTO (R_ARM_ALU_PC_G2, /* type */
949 2, /* size (0 = byte, 1 = short, 2 = long) */
951 TRUE, /* pc_relative */
953 complain_overflow_dont,/* complain_on_overflow */
954 bfd_elf_generic_reloc, /* special_function */
955 "R_ARM_ALU_PC_G2", /* name */
956 FALSE, /* partial_inplace */
957 0xffffffff, /* src_mask */
958 0xffffffff, /* dst_mask */
959 TRUE), /* pcrel_offset */
961 HOWTO (R_ARM_LDR_PC_G1, /* type */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
965 TRUE, /* pc_relative */
967 complain_overflow_dont,/* complain_on_overflow */
968 bfd_elf_generic_reloc, /* special_function */
969 "R_ARM_LDR_PC_G1", /* name */
970 FALSE, /* partial_inplace */
971 0xffffffff, /* src_mask */
972 0xffffffff, /* dst_mask */
973 TRUE), /* pcrel_offset */
975 HOWTO (R_ARM_LDR_PC_G2, /* type */
977 2, /* size (0 = byte, 1 = short, 2 = long) */
979 TRUE, /* pc_relative */
981 complain_overflow_dont,/* complain_on_overflow */
982 bfd_elf_generic_reloc, /* special_function */
983 "R_ARM_LDR_PC_G2", /* name */
984 FALSE, /* partial_inplace */
985 0xffffffff, /* src_mask */
986 0xffffffff, /* dst_mask */
987 TRUE), /* pcrel_offset */
989 HOWTO (R_ARM_LDRS_PC_G0, /* type */
991 2, /* size (0 = byte, 1 = short, 2 = long) */
993 TRUE, /* pc_relative */
995 complain_overflow_dont,/* complain_on_overflow */
996 bfd_elf_generic_reloc, /* special_function */
997 "R_ARM_LDRS_PC_G0", /* name */
998 FALSE, /* partial_inplace */
999 0xffffffff, /* src_mask */
1000 0xffffffff, /* dst_mask */
1001 TRUE), /* pcrel_offset */
1003 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1005 2, /* size (0 = byte, 1 = short, 2 = long) */
1007 TRUE, /* pc_relative */
1009 complain_overflow_dont,/* complain_on_overflow */
1010 bfd_elf_generic_reloc, /* special_function */
1011 "R_ARM_LDRS_PC_G1", /* name */
1012 FALSE, /* partial_inplace */
1013 0xffffffff, /* src_mask */
1014 0xffffffff, /* dst_mask */
1015 TRUE), /* pcrel_offset */
1017 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1019 2, /* size (0 = byte, 1 = short, 2 = long) */
1021 TRUE, /* pc_relative */
1023 complain_overflow_dont,/* complain_on_overflow */
1024 bfd_elf_generic_reloc, /* special_function */
1025 "R_ARM_LDRS_PC_G2", /* name */
1026 FALSE, /* partial_inplace */
1027 0xffffffff, /* src_mask */
1028 0xffffffff, /* dst_mask */
1029 TRUE), /* pcrel_offset */
1031 HOWTO (R_ARM_LDC_PC_G0, /* type */
1033 2, /* size (0 = byte, 1 = short, 2 = long) */
1035 TRUE, /* pc_relative */
1037 complain_overflow_dont,/* complain_on_overflow */
1038 bfd_elf_generic_reloc, /* special_function */
1039 "R_ARM_LDC_PC_G0", /* name */
1040 FALSE, /* partial_inplace */
1041 0xffffffff, /* src_mask */
1042 0xffffffff, /* dst_mask */
1043 TRUE), /* pcrel_offset */
1045 HOWTO (R_ARM_LDC_PC_G1, /* type */
1047 2, /* size (0 = byte, 1 = short, 2 = long) */
1049 TRUE, /* pc_relative */
1051 complain_overflow_dont,/* complain_on_overflow */
1052 bfd_elf_generic_reloc, /* special_function */
1053 "R_ARM_LDC_PC_G1", /* name */
1054 FALSE, /* partial_inplace */
1055 0xffffffff, /* src_mask */
1056 0xffffffff, /* dst_mask */
1057 TRUE), /* pcrel_offset */
1059 HOWTO (R_ARM_LDC_PC_G2, /* type */
1061 2, /* size (0 = byte, 1 = short, 2 = long) */
1063 TRUE, /* pc_relative */
1065 complain_overflow_dont,/* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_ARM_LDC_PC_G2", /* name */
1068 FALSE, /* partial_inplace */
1069 0xffffffff, /* src_mask */
1070 0xffffffff, /* dst_mask */
1071 TRUE), /* pcrel_offset */
1073 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1077 TRUE, /* pc_relative */
1079 complain_overflow_dont,/* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_ARM_ALU_SB_G0_NC", /* name */
1082 FALSE, /* partial_inplace */
1083 0xffffffff, /* src_mask */
1084 0xffffffff, /* dst_mask */
1085 TRUE), /* pcrel_offset */
1087 HOWTO (R_ARM_ALU_SB_G0, /* type */
1089 2, /* size (0 = byte, 1 = short, 2 = long) */
1091 TRUE, /* pc_relative */
1093 complain_overflow_dont,/* complain_on_overflow */
1094 bfd_elf_generic_reloc, /* special_function */
1095 "R_ARM_ALU_SB_G0", /* name */
1096 FALSE, /* partial_inplace */
1097 0xffffffff, /* src_mask */
1098 0xffffffff, /* dst_mask */
1099 TRUE), /* pcrel_offset */
1101 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1103 2, /* size (0 = byte, 1 = short, 2 = long) */
1105 TRUE, /* pc_relative */
1107 complain_overflow_dont,/* complain_on_overflow */
1108 bfd_elf_generic_reloc, /* special_function */
1109 "R_ARM_ALU_SB_G1_NC", /* name */
1110 FALSE, /* partial_inplace */
1111 0xffffffff, /* src_mask */
1112 0xffffffff, /* dst_mask */
1113 TRUE), /* pcrel_offset */
1115 HOWTO (R_ARM_ALU_SB_G1, /* type */
1117 2, /* size (0 = byte, 1 = short, 2 = long) */
1119 TRUE, /* pc_relative */
1121 complain_overflow_dont,/* complain_on_overflow */
1122 bfd_elf_generic_reloc, /* special_function */
1123 "R_ARM_ALU_SB_G1", /* name */
1124 FALSE, /* partial_inplace */
1125 0xffffffff, /* src_mask */
1126 0xffffffff, /* dst_mask */
1127 TRUE), /* pcrel_offset */
1129 HOWTO (R_ARM_ALU_SB_G2, /* type */
1131 2, /* size (0 = byte, 1 = short, 2 = long) */
1133 TRUE, /* pc_relative */
1135 complain_overflow_dont,/* complain_on_overflow */
1136 bfd_elf_generic_reloc, /* special_function */
1137 "R_ARM_ALU_SB_G2", /* name */
1138 FALSE, /* partial_inplace */
1139 0xffffffff, /* src_mask */
1140 0xffffffff, /* dst_mask */
1141 TRUE), /* pcrel_offset */
1143 HOWTO (R_ARM_LDR_SB_G0, /* type */
1145 2, /* size (0 = byte, 1 = short, 2 = long) */
1147 TRUE, /* pc_relative */
1149 complain_overflow_dont,/* complain_on_overflow */
1150 bfd_elf_generic_reloc, /* special_function */
1151 "R_ARM_LDR_SB_G0", /* name */
1152 FALSE, /* partial_inplace */
1153 0xffffffff, /* src_mask */
1154 0xffffffff, /* dst_mask */
1155 TRUE), /* pcrel_offset */
1157 HOWTO (R_ARM_LDR_SB_G1, /* type */
1159 2, /* size (0 = byte, 1 = short, 2 = long) */
1161 TRUE, /* pc_relative */
1163 complain_overflow_dont,/* complain_on_overflow */
1164 bfd_elf_generic_reloc, /* special_function */
1165 "R_ARM_LDR_SB_G1", /* name */
1166 FALSE, /* partial_inplace */
1167 0xffffffff, /* src_mask */
1168 0xffffffff, /* dst_mask */
1169 TRUE), /* pcrel_offset */
1171 HOWTO (R_ARM_LDR_SB_G2, /* type */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1175 TRUE, /* pc_relative */
1177 complain_overflow_dont,/* complain_on_overflow */
1178 bfd_elf_generic_reloc, /* special_function */
1179 "R_ARM_LDR_SB_G2", /* name */
1180 FALSE, /* partial_inplace */
1181 0xffffffff, /* src_mask */
1182 0xffffffff, /* dst_mask */
1183 TRUE), /* pcrel_offset */
1185 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1187 2, /* size (0 = byte, 1 = short, 2 = long) */
1189 TRUE, /* pc_relative */
1191 complain_overflow_dont,/* complain_on_overflow */
1192 bfd_elf_generic_reloc, /* special_function */
1193 "R_ARM_LDRS_SB_G0", /* name */
1194 FALSE, /* partial_inplace */
1195 0xffffffff, /* src_mask */
1196 0xffffffff, /* dst_mask */
1197 TRUE), /* pcrel_offset */
1199 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1201 2, /* size (0 = byte, 1 = short, 2 = long) */
1203 TRUE, /* pc_relative */
1205 complain_overflow_dont,/* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 "R_ARM_LDRS_SB_G1", /* name */
1208 FALSE, /* partial_inplace */
1209 0xffffffff, /* src_mask */
1210 0xffffffff, /* dst_mask */
1211 TRUE), /* pcrel_offset */
1213 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1215 2, /* size (0 = byte, 1 = short, 2 = long) */
1217 TRUE, /* pc_relative */
1219 complain_overflow_dont,/* complain_on_overflow */
1220 bfd_elf_generic_reloc, /* special_function */
1221 "R_ARM_LDRS_SB_G2", /* name */
1222 FALSE, /* partial_inplace */
1223 0xffffffff, /* src_mask */
1224 0xffffffff, /* dst_mask */
1225 TRUE), /* pcrel_offset */
1227 HOWTO (R_ARM_LDC_SB_G0, /* type */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1231 TRUE, /* pc_relative */
1233 complain_overflow_dont,/* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_ARM_LDC_SB_G0", /* name */
1236 FALSE, /* partial_inplace */
1237 0xffffffff, /* src_mask */
1238 0xffffffff, /* dst_mask */
1239 TRUE), /* pcrel_offset */
1241 HOWTO (R_ARM_LDC_SB_G1, /* type */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1245 TRUE, /* pc_relative */
1247 complain_overflow_dont,/* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_ARM_LDC_SB_G1", /* name */
1250 FALSE, /* partial_inplace */
1251 0xffffffff, /* src_mask */
1252 0xffffffff, /* dst_mask */
1253 TRUE), /* pcrel_offset */
1255 HOWTO (R_ARM_LDC_SB_G2, /* type */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1259 TRUE, /* pc_relative */
1261 complain_overflow_dont,/* complain_on_overflow */
1262 bfd_elf_generic_reloc, /* special_function */
1263 "R_ARM_LDC_SB_G2", /* name */
1264 FALSE, /* partial_inplace */
1265 0xffffffff, /* src_mask */
1266 0xffffffff, /* dst_mask */
1267 TRUE), /* pcrel_offset */
1269 /* End of group relocations. */
1271 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1275 FALSE, /* pc_relative */
1277 complain_overflow_dont,/* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_ARM_MOVW_BREL_NC", /* name */
1280 FALSE, /* partial_inplace */
1281 0x0000ffff, /* src_mask */
1282 0x0000ffff, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1285 HOWTO (R_ARM_MOVT_BREL, /* type */
1287 2, /* size (0 = byte, 1 = short, 2 = long) */
1289 FALSE, /* pc_relative */
1291 complain_overflow_bitfield,/* complain_on_overflow */
1292 bfd_elf_generic_reloc, /* special_function */
1293 "R_ARM_MOVT_BREL", /* name */
1294 FALSE, /* partial_inplace */
1295 0x0000ffff, /* src_mask */
1296 0x0000ffff, /* dst_mask */
1297 FALSE), /* pcrel_offset */
1299 HOWTO (R_ARM_MOVW_BREL, /* type */
1301 2, /* size (0 = byte, 1 = short, 2 = long) */
1303 FALSE, /* pc_relative */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 bfd_elf_generic_reloc, /* special_function */
1307 "R_ARM_MOVW_BREL", /* name */
1308 FALSE, /* partial_inplace */
1309 0x0000ffff, /* src_mask */
1310 0x0000ffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1313 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1317 FALSE, /* pc_relative */
1319 complain_overflow_dont,/* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_ARM_THM_MOVW_BREL_NC",/* name */
1322 FALSE, /* partial_inplace */
1323 0x040f70ff, /* src_mask */
1324 0x040f70ff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1327 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1329 2, /* size (0 = byte, 1 = short, 2 = long) */
1331 FALSE, /* pc_relative */
1333 complain_overflow_bitfield,/* complain_on_overflow */
1334 bfd_elf_generic_reloc, /* special_function */
1335 "R_ARM_THM_MOVT_BREL", /* name */
1336 FALSE, /* partial_inplace */
1337 0x040f70ff, /* src_mask */
1338 0x040f70ff, /* dst_mask */
1339 FALSE), /* pcrel_offset */
1341 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1343 2, /* size (0 = byte, 1 = short, 2 = long) */
1345 FALSE, /* pc_relative */
1347 complain_overflow_dont,/* complain_on_overflow */
1348 bfd_elf_generic_reloc, /* special_function */
1349 "R_ARM_THM_MOVW_BREL", /* name */
1350 FALSE, /* partial_inplace */
1351 0x040f70ff, /* src_mask */
1352 0x040f70ff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1355 HOWTO (R_ARM_TLS_GOTDESC, /* type */
1357 2, /* size (0 = byte, 1 = short, 2 = long) */
1359 FALSE, /* pc_relative */
1361 complain_overflow_bitfield,/* complain_on_overflow */
1362 NULL, /* special_function */
1363 "R_ARM_TLS_GOTDESC", /* name */
1364 TRUE, /* partial_inplace */
1365 0xffffffff, /* src_mask */
1366 0xffffffff, /* dst_mask */
1367 FALSE), /* pcrel_offset */
1369 HOWTO (R_ARM_TLS_CALL, /* type */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1373 FALSE, /* pc_relative */
1375 complain_overflow_dont,/* complain_on_overflow */
1376 bfd_elf_generic_reloc, /* special_function */
1377 "R_ARM_TLS_CALL", /* name */
1378 FALSE, /* partial_inplace */
1379 0x00ffffff, /* src_mask */
1380 0x00ffffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1383 HOWTO (R_ARM_TLS_DESCSEQ, /* type */
1385 2, /* size (0 = byte, 1 = short, 2 = long) */
1387 FALSE, /* pc_relative */
1389 complain_overflow_bitfield,/* complain_on_overflow */
1390 bfd_elf_generic_reloc, /* special_function */
1391 "R_ARM_TLS_DESCSEQ", /* name */
1392 FALSE, /* partial_inplace */
1393 0x00000000, /* src_mask */
1394 0x00000000, /* dst_mask */
1395 FALSE), /* pcrel_offset */
1397 HOWTO (R_ARM_THM_TLS_CALL, /* type */
1399 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 FALSE, /* pc_relative */
1403 complain_overflow_dont,/* complain_on_overflow */
1404 bfd_elf_generic_reloc, /* special_function */
1405 "R_ARM_THM_TLS_CALL", /* name */
1406 FALSE, /* partial_inplace */
1407 0x07ff07ff, /* src_mask */
1408 0x07ff07ff, /* dst_mask */
1409 FALSE), /* pcrel_offset */
1411 HOWTO (R_ARM_PLT32_ABS, /* type */
1413 2, /* size (0 = byte, 1 = short, 2 = long) */
1415 FALSE, /* pc_relative */
1417 complain_overflow_dont,/* complain_on_overflow */
1418 bfd_elf_generic_reloc, /* special_function */
1419 "R_ARM_PLT32_ABS", /* name */
1420 FALSE, /* partial_inplace */
1421 0xffffffff, /* src_mask */
1422 0xffffffff, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1425 HOWTO (R_ARM_GOT_ABS, /* type */
1427 2, /* size (0 = byte, 1 = short, 2 = long) */
1429 FALSE, /* pc_relative */
1431 complain_overflow_dont,/* complain_on_overflow */
1432 bfd_elf_generic_reloc, /* special_function */
1433 "R_ARM_GOT_ABS", /* name */
1434 FALSE, /* partial_inplace */
1435 0xffffffff, /* src_mask */
1436 0xffffffff, /* dst_mask */
1437 FALSE), /* pcrel_offset */
1439 HOWTO (R_ARM_GOT_PREL, /* type */
1441 2, /* size (0 = byte, 1 = short, 2 = long) */
1443 TRUE, /* pc_relative */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 bfd_elf_generic_reloc, /* special_function */
1447 "R_ARM_GOT_PREL", /* name */
1448 FALSE, /* partial_inplace */
1449 0xffffffff, /* src_mask */
1450 0xffffffff, /* dst_mask */
1451 TRUE), /* pcrel_offset */
1453 HOWTO (R_ARM_GOT_BREL12, /* type */
1455 2, /* size (0 = byte, 1 = short, 2 = long) */
1457 FALSE, /* pc_relative */
1459 complain_overflow_bitfield,/* complain_on_overflow */
1460 bfd_elf_generic_reloc, /* special_function */
1461 "R_ARM_GOT_BREL12", /* name */
1462 FALSE, /* partial_inplace */
1463 0x00000fff, /* src_mask */
1464 0x00000fff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1467 HOWTO (R_ARM_GOTOFF12, /* type */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1471 FALSE, /* pc_relative */
1473 complain_overflow_bitfield,/* complain_on_overflow */
1474 bfd_elf_generic_reloc, /* special_function */
1475 "R_ARM_GOTOFF12", /* name */
1476 FALSE, /* partial_inplace */
1477 0x00000fff, /* src_mask */
1478 0x00000fff, /* dst_mask */
1479 FALSE), /* pcrel_offset */
1481 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1483 /* GNU extension to record C++ vtable member usage */
1484 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1486 2, /* size (0 = byte, 1 = short, 2 = long) */
1488 FALSE, /* pc_relative */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1492 "R_ARM_GNU_VTENTRY", /* name */
1493 FALSE, /* partial_inplace */
1496 FALSE), /* pcrel_offset */
1498 /* GNU extension to record C++ vtable hierarchy */
1499 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1501 2, /* size (0 = byte, 1 = short, 2 = long) */
1503 FALSE, /* pc_relative */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 NULL, /* special_function */
1507 "R_ARM_GNU_VTINHERIT", /* name */
1508 FALSE, /* partial_inplace */
1511 FALSE), /* pcrel_offset */
1513 HOWTO (R_ARM_THM_JUMP11, /* type */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 TRUE, /* pc_relative */
1519 complain_overflow_signed, /* complain_on_overflow */
1520 bfd_elf_generic_reloc, /* special_function */
1521 "R_ARM_THM_JUMP11", /* name */
1522 FALSE, /* partial_inplace */
1523 0x000007ff, /* src_mask */
1524 0x000007ff, /* dst_mask */
1525 TRUE), /* pcrel_offset */
1527 HOWTO (R_ARM_THM_JUMP8, /* type */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 TRUE, /* pc_relative */
1533 complain_overflow_signed, /* complain_on_overflow */
1534 bfd_elf_generic_reloc, /* special_function */
1535 "R_ARM_THM_JUMP8", /* name */
1536 FALSE, /* partial_inplace */
1537 0x000000ff, /* src_mask */
1538 0x000000ff, /* dst_mask */
1539 TRUE), /* pcrel_offset */
1541 /* TLS relocations */
1542 HOWTO (R_ARM_TLS_GD32, /* type */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1546 FALSE, /* pc_relative */
1548 complain_overflow_bitfield,/* complain_on_overflow */
1549 NULL, /* special_function */
1550 "R_ARM_TLS_GD32", /* name */
1551 TRUE, /* partial_inplace */
1552 0xffffffff, /* src_mask */
1553 0xffffffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1556 HOWTO (R_ARM_TLS_LDM32, /* type */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 FALSE, /* pc_relative */
1562 complain_overflow_bitfield,/* complain_on_overflow */
1563 bfd_elf_generic_reloc, /* special_function */
1564 "R_ARM_TLS_LDM32", /* name */
1565 TRUE, /* partial_inplace */
1566 0xffffffff, /* src_mask */
1567 0xffffffff, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1570 HOWTO (R_ARM_TLS_LDO32, /* type */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1574 FALSE, /* pc_relative */
1576 complain_overflow_bitfield,/* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_ARM_TLS_LDO32", /* name */
1579 TRUE, /* partial_inplace */
1580 0xffffffff, /* src_mask */
1581 0xffffffff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1584 HOWTO (R_ARM_TLS_IE32, /* type */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 FALSE, /* pc_relative */
1590 complain_overflow_bitfield,/* complain_on_overflow */
1591 NULL, /* special_function */
1592 "R_ARM_TLS_IE32", /* name */
1593 TRUE, /* partial_inplace */
1594 0xffffffff, /* src_mask */
1595 0xffffffff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1598 HOWTO (R_ARM_TLS_LE32, /* type */
1600 2, /* size (0 = byte, 1 = short, 2 = long) */
1602 FALSE, /* pc_relative */
1604 complain_overflow_bitfield,/* complain_on_overflow */
1605 bfd_elf_generic_reloc, /* special_function */
1606 "R_ARM_TLS_LE32", /* name */
1607 TRUE, /* partial_inplace */
1608 0xffffffff, /* src_mask */
1609 0xffffffff, /* dst_mask */
1610 FALSE), /* pcrel_offset */
1612 HOWTO (R_ARM_TLS_LDO12, /* type */
1614 2, /* size (0 = byte, 1 = short, 2 = long) */
1616 FALSE, /* pc_relative */
1618 complain_overflow_bitfield,/* complain_on_overflow */
1619 bfd_elf_generic_reloc, /* special_function */
1620 "R_ARM_TLS_LDO12", /* name */
1621 FALSE, /* partial_inplace */
1622 0x00000fff, /* src_mask */
1623 0x00000fff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1626 HOWTO (R_ARM_TLS_LE12, /* type */
1628 2, /* size (0 = byte, 1 = short, 2 = long) */
1630 FALSE, /* pc_relative */
1632 complain_overflow_bitfield,/* complain_on_overflow */
1633 bfd_elf_generic_reloc, /* special_function */
1634 "R_ARM_TLS_LE12", /* name */
1635 FALSE, /* partial_inplace */
1636 0x00000fff, /* src_mask */
1637 0x00000fff, /* dst_mask */
1638 FALSE), /* pcrel_offset */
1640 HOWTO (R_ARM_TLS_IE12GP, /* type */
1642 2, /* size (0 = byte, 1 = short, 2 = long) */
1644 FALSE, /* pc_relative */
1646 complain_overflow_bitfield,/* complain_on_overflow */
1647 bfd_elf_generic_reloc, /* special_function */
1648 "R_ARM_TLS_IE12GP", /* name */
1649 FALSE, /* partial_inplace */
1650 0x00000fff, /* src_mask */
1651 0x00000fff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1672 HOWTO (R_ARM_THM_TLS_DESCSEQ, /* type */
1674 1, /* size (0 = byte, 1 = short, 2 = long) */
1676 FALSE, /* pc_relative */
1678 complain_overflow_bitfield,/* complain_on_overflow */
1679 bfd_elf_generic_reloc, /* special_function */
1680 "R_ARM_THM_TLS_DESCSEQ",/* name */
1681 FALSE, /* partial_inplace */
1682 0x00000000, /* src_mask */
1683 0x00000000, /* dst_mask */
1684 FALSE), /* pcrel_offset */
1687 /* 112-127 private relocations
1688 128 R_ARM_ME_TOO, obsolete
1689 129-255 unallocated in AAELF.
1691 249-255 extended, currently unused, relocations: */
1693 static reloc_howto_type elf32_arm_howto_table_2[4] =
1695 HOWTO (R_ARM_RREL32, /* type */
1697 0, /* size (0 = byte, 1 = short, 2 = long) */
1699 FALSE, /* pc_relative */
1701 complain_overflow_dont,/* complain_on_overflow */
1702 bfd_elf_generic_reloc, /* special_function */
1703 "R_ARM_RREL32", /* name */
1704 FALSE, /* partial_inplace */
1707 FALSE), /* pcrel_offset */
1709 HOWTO (R_ARM_RABS32, /* type */
1711 0, /* size (0 = byte, 1 = short, 2 = long) */
1713 FALSE, /* pc_relative */
1715 complain_overflow_dont,/* complain_on_overflow */
1716 bfd_elf_generic_reloc, /* special_function */
1717 "R_ARM_RABS32", /* name */
1718 FALSE, /* partial_inplace */
1721 FALSE), /* pcrel_offset */
1723 HOWTO (R_ARM_RPC24, /* type */
1725 0, /* size (0 = byte, 1 = short, 2 = long) */
1727 FALSE, /* pc_relative */
1729 complain_overflow_dont,/* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1731 "R_ARM_RPC24", /* name */
1732 FALSE, /* partial_inplace */
1735 FALSE), /* pcrel_offset */
1737 HOWTO (R_ARM_RBASE, /* type */
1739 0, /* size (0 = byte, 1 = short, 2 = long) */
1741 FALSE, /* pc_relative */
1743 complain_overflow_dont,/* complain_on_overflow */
1744 bfd_elf_generic_reloc, /* special_function */
1745 "R_ARM_RBASE", /* name */
1746 FALSE, /* partial_inplace */
1749 FALSE) /* pcrel_offset */
1752 static reloc_howto_type *
1753 elf32_arm_howto_from_type (unsigned int r_type)
1755 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
1756 return &elf32_arm_howto_table_1[r_type];
1758 if (r_type >= R_ARM_RREL32
1759 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_2))
1760 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1766 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1767 Elf_Internal_Rela * elf_reloc)
1769 unsigned int r_type;
1771 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1772 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1775 struct elf32_arm_reloc_map
1777 bfd_reloc_code_real_type bfd_reloc_val;
1778 unsigned char elf_reloc_val;
1781 /* All entries in this list must also be present in elf32_arm_howto_table. */
1782 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1784 {BFD_RELOC_NONE, R_ARM_NONE},
1785 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1786 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1787 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1788 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1789 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1790 {BFD_RELOC_32, R_ARM_ABS32},
1791 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1792 {BFD_RELOC_8, R_ARM_ABS8},
1793 {BFD_RELOC_16, R_ARM_ABS16},
1794 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1795 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1796 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1797 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1798 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1799 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1800 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1801 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1802 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1803 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1804 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1805 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1806 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1807 {BFD_RELOC_ARM_GOT_PREL, R_ARM_GOT_PREL},
1808 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1809 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1810 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1811 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1812 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1813 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1814 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1815 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1816 {BFD_RELOC_ARM_TLS_GOTDESC, R_ARM_TLS_GOTDESC},
1817 {BFD_RELOC_ARM_TLS_CALL, R_ARM_TLS_CALL},
1818 {BFD_RELOC_ARM_THM_TLS_CALL, R_ARM_THM_TLS_CALL},
1819 {BFD_RELOC_ARM_TLS_DESCSEQ, R_ARM_TLS_DESCSEQ},
1820 {BFD_RELOC_ARM_THM_TLS_DESCSEQ, R_ARM_THM_TLS_DESCSEQ},
1821 {BFD_RELOC_ARM_TLS_DESC, R_ARM_TLS_DESC},
1822 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1823 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1824 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1825 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1826 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1827 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1828 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1829 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1830 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1831 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1832 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1833 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1834 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1835 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1836 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1837 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1838 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1839 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1840 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1841 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1842 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1843 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1844 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1845 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1846 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1847 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1848 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1849 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1850 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1851 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1852 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1853 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1854 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1855 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1856 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1857 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1858 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1859 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1860 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1861 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1862 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1863 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1864 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1865 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1866 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1867 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1868 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX}
1871 static reloc_howto_type *
1872 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1873 bfd_reloc_code_real_type code)
1877 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
1878 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1879 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1884 static reloc_howto_type *
1885 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1890 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++)
1891 if (elf32_arm_howto_table_1[i].name != NULL
1892 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1893 return &elf32_arm_howto_table_1[i];
1895 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
1896 if (elf32_arm_howto_table_2[i].name != NULL
1897 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1898 return &elf32_arm_howto_table_2[i];
1903 /* Support for core dump NOTE sections. */
1906 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1911 switch (note->descsz)
1916 case 148: /* Linux/ARM 32-bit. */
1918 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1921 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
1930 /* Make a ".reg/999" section. */
1931 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1932 size, note->descpos + offset);
1936 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1938 switch (note->descsz)
1943 case 124: /* Linux/ARM elf_prpsinfo. */
1944 elf_tdata (abfd)->core_program
1945 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1946 elf_tdata (abfd)->core_command
1947 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1950 /* Note that for some reason, a spurious space is tacked
1951 onto the end of the args in some (at least one anyway)
1952 implementations, so strip it off if it exists. */
1954 char *command = elf_tdata (abfd)->core_command;
1955 int n = strlen (command);
1957 if (0 < n && command[n - 1] == ' ')
1958 command[n - 1] = '\0';
1964 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1965 #define TARGET_LITTLE_NAME "elf32-littlearm"
1966 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1967 #define TARGET_BIG_NAME "elf32-bigarm"
1969 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1970 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1972 typedef unsigned long int insn32;
1973 typedef unsigned short int insn16;
1975 /* In lieu of proper flags, assume all EABIv4 or later objects are
1977 #define INTERWORK_FLAG(abfd) \
1978 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1979 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
1980 || ((abfd)->flags & BFD_LINKER_CREATED))
1982 /* The linker script knows the section names for placement.
1983 The entry_names are used to do simple name mangling on the stubs.
1984 Given a function name, and its type, the stub can be found. The
1985 name can be changed. The only requirement is the %s be present. */
1986 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1987 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1989 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1990 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1992 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1993 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1995 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1996 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1998 #define STUB_ENTRY_NAME "__%s_veneer"
2000 /* The name of the dynamic interpreter. This is put in the .interp
2002 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2004 static const unsigned long tls_trampoline [] =
2006 0xe08e0000, /* add r0, lr, r0 */
2007 0xe5901004, /* ldr r1, [r0,#4] */
2008 0xe12fff11, /* bx r1 */
2011 static const unsigned long dl_tlsdesc_lazy_trampoline [] =
2013 0xe52d2004, /* push {r2} */
2014 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2015 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2016 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2017 0xe081100f, /* 2: add r1, pc */
2018 0xe12fff12, /* bx r2 */
2019 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2020 + dl_tlsdesc_lazy_resolver(GOT) */
2021 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2024 #ifdef FOUR_WORD_PLT
2026 /* The first entry in a procedure linkage table looks like
2027 this. It is set up so that any shared library function that is
2028 called before the relocation has been set up calls the dynamic
2030 static const bfd_vma elf32_arm_plt0_entry [] =
2032 0xe52de004, /* str lr, [sp, #-4]! */
2033 0xe59fe010, /* ldr lr, [pc, #16] */
2034 0xe08fe00e, /* add lr, pc, lr */
2035 0xe5bef008, /* ldr pc, [lr, #8]! */
2038 /* Subsequent entries in a procedure linkage table look like
2040 static const bfd_vma elf32_arm_plt_entry [] =
2042 0xe28fc600, /* add ip, pc, #NN */
2043 0xe28cca00, /* add ip, ip, #NN */
2044 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2045 0x00000000, /* unused */
2050 /* The first entry in a procedure linkage table looks like
2051 this. It is set up so that any shared library function that is
2052 called before the relocation has been set up calls the dynamic
2054 static const bfd_vma elf32_arm_plt0_entry [] =
2056 0xe52de004, /* str lr, [sp, #-4]! */
2057 0xe59fe004, /* ldr lr, [pc, #4] */
2058 0xe08fe00e, /* add lr, pc, lr */
2059 0xe5bef008, /* ldr pc, [lr, #8]! */
2060 0x00000000, /* &GOT[0] - . */
2063 /* Subsequent entries in a procedure linkage table look like
2065 static const bfd_vma elf32_arm_plt_entry [] =
2067 0xe28fc600, /* add ip, pc, #0xNN00000 */
2068 0xe28cca00, /* add ip, ip, #0xNN000 */
2069 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2074 /* The format of the first entry in the procedure linkage table
2075 for a VxWorks executable. */
2076 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
2078 0xe52dc008, /* str ip,[sp,#-8]! */
2079 0xe59fc000, /* ldr ip,[pc] */
2080 0xe59cf008, /* ldr pc,[ip,#8] */
2081 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2084 /* The format of subsequent entries in a VxWorks executable. */
2085 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
2087 0xe59fc000, /* ldr ip,[pc] */
2088 0xe59cf000, /* ldr pc,[ip] */
2089 0x00000000, /* .long @got */
2090 0xe59fc000, /* ldr ip,[pc] */
2091 0xea000000, /* b _PLT */
2092 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2095 /* The format of entries in a VxWorks shared library. */
2096 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
2098 0xe59fc000, /* ldr ip,[pc] */
2099 0xe79cf009, /* ldr pc,[ip,r9] */
2100 0x00000000, /* .long @got */
2101 0xe59fc000, /* ldr ip,[pc] */
2102 0xe599f008, /* ldr pc,[r9,#8] */
2103 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2106 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2107 #define PLT_THUMB_STUB_SIZE 4
2108 static const bfd_vma elf32_arm_plt_thumb_stub [] =
2114 /* The entries in a PLT when using a DLL-based target with multiple
2116 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2118 0xe51ff004, /* ldr pc, [pc, #-4] */
2119 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2122 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2123 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2124 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2125 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2126 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2127 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2137 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2138 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2139 is inserted in arm_build_one_stub(). */
2140 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2141 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2142 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2143 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2144 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2145 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2150 enum stub_insn_type type;
2151 unsigned int r_type;
2155 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2156 to reach the stub if necessary. */
2157 static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
2159 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2160 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2163 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2165 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] =
2167 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2168 ARM_INSN(0xe12fff1c), /* bx ip */
2169 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2172 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2173 static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
2175 THUMB16_INSN(0xb401), /* push {r0} */
2176 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2177 THUMB16_INSN(0x4684), /* mov ip, r0 */
2178 THUMB16_INSN(0xbc01), /* pop {r0} */
2179 THUMB16_INSN(0x4760), /* bx ip */
2180 THUMB16_INSN(0xbf00), /* nop */
2181 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2184 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2186 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
2188 THUMB16_INSN(0x4778), /* bx pc */
2189 THUMB16_INSN(0x46c0), /* nop */
2190 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2191 ARM_INSN(0xe12fff1c), /* bx ip */
2192 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2195 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2197 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
2199 THUMB16_INSN(0x4778), /* bx pc */
2200 THUMB16_INSN(0x46c0), /* nop */
2201 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2202 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2205 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2206 one, when the destination is close enough. */
2207 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
2209 THUMB16_INSN(0x4778), /* bx pc */
2210 THUMB16_INSN(0x46c0), /* nop */
2211 ARM_REL_INSN(0xea000000, -8), /* b (X-8) */
2214 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2215 blx to reach the stub if necessary. */
2216 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] =
2218 ARM_INSN(0xe59fc000), /* ldr ip, [pc] */
2219 ARM_INSN(0xe08ff00c), /* add pc, pc, ip */
2220 DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2223 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2224 blx to reach the stub if necessary. We can not add into pc;
2225 it is not guaranteed to mode switch (different in ARMv6 and
2227 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] =
2229 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2230 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2231 ARM_INSN(0xe12fff1c), /* bx ip */
2232 DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2235 /* V4T ARM -> ARM long branch stub, PIC. */
2236 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
2238 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2239 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2240 ARM_INSN(0xe12fff1c), /* bx ip */
2241 DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2244 /* V4T Thumb -> ARM long branch stub, PIC. */
2245 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
2247 THUMB16_INSN(0x4778), /* bx pc */
2248 THUMB16_INSN(0x46c0), /* nop */
2249 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2250 ARM_INSN(0xe08cf00f), /* add pc, ip, pc */
2251 DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2254 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2256 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
2258 THUMB16_INSN(0xb401), /* push {r0} */
2259 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2260 THUMB16_INSN(0x46fc), /* mov ip, pc */
2261 THUMB16_INSN(0x4484), /* add ip, r0 */
2262 THUMB16_INSN(0xbc01), /* pop {r0} */
2263 THUMB16_INSN(0x4760), /* bx ip */
2264 DATA_WORD(0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */
2267 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2269 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
2271 THUMB16_INSN(0x4778), /* bx pc */
2272 THUMB16_INSN(0x46c0), /* nop */
2273 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2274 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2275 ARM_INSN(0xe12fff1c), /* bx ip */
2276 DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2279 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2280 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2281 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
2283 ARM_INSN(0xe59f1000), /* ldr r1, [pc] */
2284 ARM_INSN(0xe08ff001), /* add pc, pc, r1 */
2285 DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2288 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2289 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2290 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
2292 THUMB16_INSN(0x4778), /* bx pc */
2293 THUMB16_INSN(0x46c0), /* nop */
2294 ARM_INSN(0xe59f1000), /* ldr r1, [pc, #0] */
2295 ARM_INSN(0xe081f00f), /* add pc, r1, pc */
2296 DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2299 /* Cortex-A8 erratum-workaround stubs. */
2301 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2302 can't use a conditional branch to reach this stub). */
2304 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond[] =
2306 THUMB16_BCOND_INSN(0xd001), /* b<cond>.n true. */
2307 THUMB32_B_INSN(0xf000b800, -4), /* b.w insn_after_original_branch. */
2308 THUMB32_B_INSN(0xf000b800, -4) /* true: b.w original_branch_dest. */
2311 /* Stub used for b.w and bl.w instructions. */
2313 static const insn_sequence elf32_arm_stub_a8_veneer_b[] =
2315 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2318 static const insn_sequence elf32_arm_stub_a8_veneer_bl[] =
2320 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2323 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2324 instruction (which switches to ARM mode) to point to this stub. Jump to the
2325 real destination using an ARM-mode branch. */
2327 static const insn_sequence elf32_arm_stub_a8_veneer_blx[] =
2329 ARM_REL_INSN(0xea000000, -8) /* b original_branch_dest. */
2332 /* Section name for stubs is the associated section name plus this
2334 #define STUB_SUFFIX ".stub"
2336 /* One entry per long/short branch stub defined above. */
2338 DEF_STUB(long_branch_any_any) \
2339 DEF_STUB(long_branch_v4t_arm_thumb) \
2340 DEF_STUB(long_branch_thumb_only) \
2341 DEF_STUB(long_branch_v4t_thumb_thumb) \
2342 DEF_STUB(long_branch_v4t_thumb_arm) \
2343 DEF_STUB(short_branch_v4t_thumb_arm) \
2344 DEF_STUB(long_branch_any_arm_pic) \
2345 DEF_STUB(long_branch_any_thumb_pic) \
2346 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2347 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2348 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2349 DEF_STUB(long_branch_thumb_only_pic) \
2350 DEF_STUB(long_branch_any_tls_pic) \
2351 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2352 DEF_STUB(a8_veneer_b_cond) \
2353 DEF_STUB(a8_veneer_b) \
2354 DEF_STUB(a8_veneer_bl) \
2355 DEF_STUB(a8_veneer_blx)
2357 #define DEF_STUB(x) arm_stub_##x,
2358 enum elf32_arm_stub_type {
2361 /* Note the first a8_veneer type */
2362 arm_stub_a8_veneer_lwm = arm_stub_a8_veneer_b_cond
2368 const insn_sequence* template_sequence;
2372 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2373 static const stub_def stub_definitions[] = {
2378 struct elf32_arm_stub_hash_entry
2380 /* Base hash table entry structure. */
2381 struct bfd_hash_entry root;
2383 /* The stub section. */
2386 /* Offset within stub_sec of the beginning of this stub. */
2387 bfd_vma stub_offset;
2389 /* Given the symbol's value and its section we can determine its final
2390 value when building the stubs (so the stub knows where to jump). */
2391 bfd_vma target_value;
2392 asection *target_section;
2394 /* Offset to apply to relocation referencing target_value. */
2395 bfd_vma target_addend;
2397 /* The instruction which caused this stub to be generated (only valid for
2398 Cortex-A8 erratum workaround stubs at present). */
2399 unsigned long orig_insn;
2401 /* The stub type. */
2402 enum elf32_arm_stub_type stub_type;
2403 /* Its encoding size in bytes. */
2406 const insn_sequence *stub_template;
2407 /* The size of the template (number of entries). */
2408 int stub_template_size;
2410 /* The symbol table entry, if any, that this was derived from. */
2411 struct elf32_arm_link_hash_entry *h;
2413 /* Destination symbol type (STT_ARM_TFUNC, ...) */
2414 unsigned char st_type;
2416 /* Where this stub is being called from, or, in the case of combined
2417 stub sections, the first input section in the group. */
2420 /* The name for the local symbol at the start of this stub. The
2421 stub name in the hash table has to be unique; this does not, so
2422 it can be friendlier. */
2426 /* Used to build a map of a section. This is required for mixed-endian
2429 typedef struct elf32_elf_section_map
2434 elf32_arm_section_map;
2436 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2440 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2441 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2442 VFP11_ERRATUM_ARM_VENEER,
2443 VFP11_ERRATUM_THUMB_VENEER
2445 elf32_vfp11_erratum_type;
2447 typedef struct elf32_vfp11_erratum_list
2449 struct elf32_vfp11_erratum_list *next;
2455 struct elf32_vfp11_erratum_list *veneer;
2456 unsigned int vfp_insn;
2460 struct elf32_vfp11_erratum_list *branch;
2464 elf32_vfp11_erratum_type type;
2466 elf32_vfp11_erratum_list;
2471 INSERT_EXIDX_CANTUNWIND_AT_END
2473 arm_unwind_edit_type;
2475 /* A (sorted) list of edits to apply to an unwind table. */
2476 typedef struct arm_unwind_table_edit
2478 arm_unwind_edit_type type;
2479 /* Note: we sometimes want to insert an unwind entry corresponding to a
2480 section different from the one we're currently writing out, so record the
2481 (text) section this edit relates to here. */
2482 asection *linked_section;
2484 struct arm_unwind_table_edit *next;
2486 arm_unwind_table_edit;
2488 typedef struct _arm_elf_section_data
2490 /* Information about mapping symbols. */
2491 struct bfd_elf_section_data elf;
2492 unsigned int mapcount;
2493 unsigned int mapsize;
2494 elf32_arm_section_map *map;
2495 /* Information about CPU errata. */
2496 unsigned int erratumcount;
2497 elf32_vfp11_erratum_list *erratumlist;
2498 /* Information about unwind tables. */
2501 /* Unwind info attached to a text section. */
2504 asection *arm_exidx_sec;
2507 /* Unwind info attached to an .ARM.exidx section. */
2510 arm_unwind_table_edit *unwind_edit_list;
2511 arm_unwind_table_edit *unwind_edit_tail;
2515 _arm_elf_section_data;
2517 #define elf32_arm_section_data(sec) \
2518 ((_arm_elf_section_data *) elf_section_data (sec))
2520 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2521 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2522 so may be created multiple times: we use an array of these entries whilst
2523 relaxing which we can refresh easily, then create stubs for each potentially
2524 erratum-triggering instruction once we've settled on a solution. */
2526 struct a8_erratum_fix {
2531 unsigned long orig_insn;
2533 enum elf32_arm_stub_type stub_type;
2537 /* A table of relocs applied to branches which might trigger Cortex-A8
2540 struct a8_erratum_reloc {
2542 bfd_vma destination;
2543 struct elf32_arm_link_hash_entry *hash;
2544 const char *sym_name;
2545 unsigned int r_type;
2546 unsigned char st_type;
2547 bfd_boolean non_a8_stub;
2550 /* The size of the thread control block. */
2553 struct elf_arm_obj_tdata
2555 struct elf_obj_tdata root;
2557 /* tls_type for each local got entry. */
2558 char *local_got_tls_type;
2560 /* GOTPLT entries for TLS descriptors. */
2561 bfd_vma *local_tlsdesc_gotent;
2563 /* Zero to warn when linking objects with incompatible enum sizes. */
2564 int no_enum_size_warning;
2566 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2567 int no_wchar_size_warning;
2570 #define elf_arm_tdata(bfd) \
2571 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2573 #define elf32_arm_local_got_tls_type(bfd) \
2574 (elf_arm_tdata (bfd)->local_got_tls_type)
2576 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2577 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2579 #define is_arm_elf(bfd) \
2580 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2581 && elf_tdata (bfd) != NULL \
2582 && elf_object_id (bfd) == ARM_ELF_DATA)
2585 elf32_arm_mkobject (bfd *abfd)
2587 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2591 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2593 /* Arm ELF linker hash entry. */
2594 struct elf32_arm_link_hash_entry
2596 struct elf_link_hash_entry root;
2598 /* Track dynamic relocs copied for this symbol. */
2599 struct elf_dyn_relocs *dyn_relocs;
2601 /* We reference count Thumb references to a PLT entry separately,
2602 so that we can emit the Thumb trampoline only if needed. */
2603 bfd_signed_vma plt_thumb_refcount;
2605 /* Some references from Thumb code may be eliminated by BL->BLX
2606 conversion, so record them separately. */
2607 bfd_signed_vma plt_maybe_thumb_refcount;
2609 /* Since PLT entries have variable size if the Thumb prologue is
2610 used, we need to record the index into .got.plt instead of
2611 recomputing it from the PLT offset. */
2612 bfd_signed_vma plt_got_offset;
2614 #define GOT_UNKNOWN 0
2615 #define GOT_NORMAL 1
2616 #define GOT_TLS_GD 2
2617 #define GOT_TLS_IE 4
2618 #define GOT_TLS_GDESC 8
2619 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
2620 unsigned char tls_type;
2622 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
2623 starting at the end of the jump table. */
2624 bfd_vma tlsdesc_got;
2626 /* The symbol marking the real symbol location for exported thumb
2627 symbols with Arm stubs. */
2628 struct elf_link_hash_entry *export_glue;
2630 /* A pointer to the most recently used stub hash entry against this
2632 struct elf32_arm_stub_hash_entry *stub_cache;
2635 /* Traverse an arm ELF linker hash table. */
2636 #define elf32_arm_link_hash_traverse(table, func, info) \
2637 (elf_link_hash_traverse \
2639 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2642 /* Get the ARM elf linker hash table from a link_info structure. */
2643 #define elf32_arm_hash_table(info) \
2644 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2645 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2647 #define arm_stub_hash_lookup(table, string, create, copy) \
2648 ((struct elf32_arm_stub_hash_entry *) \
2649 bfd_hash_lookup ((table), (string), (create), (copy)))
2651 /* Array to keep track of which stub sections have been created, and
2652 information on stub grouping. */
2655 /* This is the section to which stubs in the group will be
2658 /* The stub section. */
2662 #define elf32_arm_compute_jump_table_size(htab) \
2663 ((htab)->next_tls_desc_index * 4)
2665 /* ARM ELF linker hash table. */
2666 struct elf32_arm_link_hash_table
2668 /* The main hash table. */
2669 struct elf_link_hash_table root;
2671 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2672 bfd_size_type thumb_glue_size;
2674 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2675 bfd_size_type arm_glue_size;
2677 /* The size in bytes of section containing the ARMv4 BX veneers. */
2678 bfd_size_type bx_glue_size;
2680 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2681 veneer has been populated. */
2682 bfd_vma bx_glue_offset[15];
2684 /* The size in bytes of the section containing glue for VFP11 erratum
2686 bfd_size_type vfp11_erratum_glue_size;
2688 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2689 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2690 elf32_arm_write_section(). */
2691 struct a8_erratum_fix *a8_erratum_fixes;
2692 unsigned int num_a8_erratum_fixes;
2694 /* An arbitrary input BFD chosen to hold the glue sections. */
2695 bfd * bfd_of_glue_owner;
2697 /* Nonzero to output a BE8 image. */
2700 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2701 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2704 /* The relocation to use for R_ARM_TARGET2 relocations. */
2707 /* 0 = Ignore R_ARM_V4BX.
2708 1 = Convert BX to MOV PC.
2709 2 = Generate v4 interworing stubs. */
2712 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2715 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2718 /* What sort of code sequences we should look for which may trigger the
2719 VFP11 denorm erratum. */
2720 bfd_arm_vfp11_fix vfp11_fix;
2722 /* Global counter for the number of fixes we have emitted. */
2723 int num_vfp11_fixes;
2725 /* Nonzero to force PIC branch veneers. */
2728 /* The number of bytes in the initial entry in the PLT. */
2729 bfd_size_type plt_header_size;
2731 /* The number of bytes in the subsequent PLT etries. */
2732 bfd_size_type plt_entry_size;
2734 /* True if the target system is VxWorks. */
2737 /* True if the target system is Symbian OS. */
2740 /* True if the target uses REL relocations. */
2743 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
2744 bfd_vma next_tls_desc_index;
2746 /* How many R_ARM_TLS_DESC relocations were generated so far. */
2747 bfd_vma num_tls_desc;
2749 /* Short-cuts to get to dynamic linker sections. */
2753 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2756 /* The offset into splt of the PLT entry for the TLS descriptor
2757 resolver. Special values are 0, if not necessary (or not found
2758 to be necessary yet), and -1 if needed but not determined
2760 bfd_vma dt_tlsdesc_plt;
2762 /* The offset into sgot of the GOT entry used by the PLT entry
2764 bfd_vma dt_tlsdesc_got;
2766 /* Offset in .plt section of tls_arm_trampoline. */
2767 bfd_vma tls_trampoline;
2769 /* Data for R_ARM_TLS_LDM32 relocations. */
2772 bfd_signed_vma refcount;
2776 /* Small local sym cache. */
2777 struct sym_cache sym_cache;
2779 /* For convenience in allocate_dynrelocs. */
2782 /* The amount of space used by the reserved portion of the sgotplt
2783 section, plus whatever space is used by the jump slots. */
2784 bfd_vma sgotplt_jump_table_size;
2786 /* The stub hash table. */
2787 struct bfd_hash_table stub_hash_table;
2789 /* Linker stub bfd. */
2792 /* Linker call-backs. */
2793 asection * (*add_stub_section) (const char *, asection *);
2794 void (*layout_sections_again) (void);
2796 /* Array to keep track of which stub sections have been created, and
2797 information on stub grouping. */
2798 struct map_stub *stub_group;
2800 /* Number of elements in stub_group. */
2803 /* Assorted information used by elf32_arm_size_stubs. */
2804 unsigned int bfd_count;
2806 asection **input_list;
2809 /* Create an entry in an ARM ELF linker hash table. */
2811 static struct bfd_hash_entry *
2812 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2813 struct bfd_hash_table * table,
2814 const char * string)
2816 struct elf32_arm_link_hash_entry * ret =
2817 (struct elf32_arm_link_hash_entry *) entry;
2819 /* Allocate the structure if it has not already been allocated by a
2822 ret = (struct elf32_arm_link_hash_entry *)
2823 bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2825 return (struct bfd_hash_entry *) ret;
2827 /* Call the allocation method of the superclass. */
2828 ret = ((struct elf32_arm_link_hash_entry *)
2829 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2833 ret->dyn_relocs = NULL;
2834 ret->tls_type = GOT_UNKNOWN;
2835 ret->tlsdesc_got = (bfd_vma) -1;
2836 ret->plt_thumb_refcount = 0;
2837 ret->plt_maybe_thumb_refcount = 0;
2838 ret->plt_got_offset = -1;
2839 ret->export_glue = NULL;
2841 ret->stub_cache = NULL;
2844 return (struct bfd_hash_entry *) ret;
2847 /* Initialize an entry in the stub hash table. */
2849 static struct bfd_hash_entry *
2850 stub_hash_newfunc (struct bfd_hash_entry *entry,
2851 struct bfd_hash_table *table,
2854 /* Allocate the structure if it has not already been allocated by a
2858 entry = (struct bfd_hash_entry *)
2859 bfd_hash_allocate (table, sizeof (struct elf32_arm_stub_hash_entry));
2864 /* Call the allocation method of the superclass. */
2865 entry = bfd_hash_newfunc (entry, table, string);
2868 struct elf32_arm_stub_hash_entry *eh;
2870 /* Initialize the local fields. */
2871 eh = (struct elf32_arm_stub_hash_entry *) entry;
2872 eh->stub_sec = NULL;
2873 eh->stub_offset = 0;
2874 eh->target_value = 0;
2875 eh->target_section = NULL;
2876 eh->target_addend = 0;
2878 eh->stub_type = arm_stub_none;
2880 eh->stub_template = NULL;
2881 eh->stub_template_size = 0;
2884 eh->output_name = NULL;
2890 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2891 shortcuts to them in our hash table. */
2894 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2896 struct elf32_arm_link_hash_table *htab;
2898 htab = elf32_arm_hash_table (info);
2902 /* BPABI objects never have a GOT, or associated sections. */
2903 if (htab->symbian_p)
2906 if (! _bfd_elf_create_got_section (dynobj, info))
2912 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2913 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2917 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2919 struct elf32_arm_link_hash_table *htab;
2921 htab = elf32_arm_hash_table (info);
2925 if (!htab->root.sgot && !create_got_section (dynobj, info))
2928 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2931 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2933 htab->srelbss = bfd_get_section_by_name (dynobj,
2934 RELOC_SECTION (htab, ".bss"));
2936 if (htab->vxworks_p)
2938 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2943 htab->plt_header_size = 0;
2944 htab->plt_entry_size
2945 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2949 htab->plt_header_size
2950 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2951 htab->plt_entry_size
2952 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2956 if (!htab->root.splt
2957 || !htab->root.srelplt
2959 || (!info->shared && !htab->srelbss))
2965 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2968 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2969 struct elf_link_hash_entry *dir,
2970 struct elf_link_hash_entry *ind)
2972 struct elf32_arm_link_hash_entry *edir, *eind;
2974 edir = (struct elf32_arm_link_hash_entry *) dir;
2975 eind = (struct elf32_arm_link_hash_entry *) ind;
2977 if (eind->dyn_relocs != NULL)
2979 if (edir->dyn_relocs != NULL)
2981 struct elf_dyn_relocs **pp;
2982 struct elf_dyn_relocs *p;
2984 /* Add reloc counts against the indirect sym to the direct sym
2985 list. Merge any entries against the same section. */
2986 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2988 struct elf_dyn_relocs *q;
2990 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2991 if (q->sec == p->sec)
2993 q->pc_count += p->pc_count;
2994 q->count += p->count;
3001 *pp = edir->dyn_relocs;
3004 edir->dyn_relocs = eind->dyn_relocs;
3005 eind->dyn_relocs = NULL;
3008 if (ind->root.type == bfd_link_hash_indirect)
3010 /* Copy over PLT info. */
3011 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
3012 eind->plt_thumb_refcount = 0;
3013 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
3014 eind->plt_maybe_thumb_refcount = 0;
3016 if (dir->got.refcount <= 0)
3018 edir->tls_type = eind->tls_type;
3019 eind->tls_type = GOT_UNKNOWN;
3023 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3026 /* Create an ARM elf linker hash table. */
3028 static struct bfd_link_hash_table *
3029 elf32_arm_link_hash_table_create (bfd *abfd)
3031 struct elf32_arm_link_hash_table *ret;
3032 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
3034 ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt);
3038 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
3039 elf32_arm_link_hash_newfunc,
3040 sizeof (struct elf32_arm_link_hash_entry),
3047 ret->sdynbss = NULL;
3048 ret->srelbss = NULL;
3049 ret->srelplt2 = NULL;
3050 ret->dt_tlsdesc_plt = 0;
3051 ret->dt_tlsdesc_got = 0;
3052 ret->tls_trampoline = 0;
3053 ret->next_tls_desc_index = 0;
3054 ret->num_tls_desc = 0;
3055 ret->thumb_glue_size = 0;
3056 ret->arm_glue_size = 0;
3057 ret->bx_glue_size = 0;
3058 memset (ret->bx_glue_offset, 0, sizeof (ret->bx_glue_offset));
3059 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3060 ret->vfp11_erratum_glue_size = 0;
3061 ret->num_vfp11_fixes = 0;
3062 ret->fix_cortex_a8 = 0;
3063 ret->bfd_of_glue_owner = NULL;
3064 ret->byteswap_code = 0;
3065 ret->target1_is_rel = 0;
3066 ret->target2_reloc = R_ARM_NONE;
3067 #ifdef FOUR_WORD_PLT
3068 ret->plt_header_size = 16;
3069 ret->plt_entry_size = 16;
3071 ret->plt_header_size = 20;
3072 ret->plt_entry_size = 12;
3079 ret->sym_cache.abfd = NULL;
3081 ret->tls_ldm_got.refcount = 0;
3082 ret->stub_bfd = NULL;
3083 ret->add_stub_section = NULL;
3084 ret->layout_sections_again = NULL;
3085 ret->stub_group = NULL;
3089 ret->input_list = NULL;
3091 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
3092 sizeof (struct elf32_arm_stub_hash_entry)))
3098 return &ret->root.root;
3101 /* Free the derived linker hash table. */
3104 elf32_arm_hash_table_free (struct bfd_link_hash_table *hash)
3106 struct elf32_arm_link_hash_table *ret
3107 = (struct elf32_arm_link_hash_table *) hash;
3109 bfd_hash_table_free (&ret->stub_hash_table);
3110 _bfd_generic_link_hash_table_free (hash);
3113 /* Determine if we're dealing with a Thumb only architecture. */
3116 using_thumb_only (struct elf32_arm_link_hash_table *globals)
3118 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3122 if (arch == TAG_CPU_ARCH_V6_M || arch == TAG_CPU_ARCH_V6S_M)
3125 if (arch != TAG_CPU_ARCH_V7 && arch != TAG_CPU_ARCH_V7E_M)
3128 profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3129 Tag_CPU_arch_profile);
3131 return profile == 'M';
3134 /* Determine if we're dealing with a Thumb-2 object. */
3137 using_thumb2 (struct elf32_arm_link_hash_table *globals)
3139 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3141 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
3144 /* Determine what kind of NOPs are available. */
3147 arch_has_arm_nop (struct elf32_arm_link_hash_table *globals)
3149 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3151 return arch == TAG_CPU_ARCH_V6T2
3152 || arch == TAG_CPU_ARCH_V6K
3153 || arch == TAG_CPU_ARCH_V7
3154 || arch == TAG_CPU_ARCH_V7E_M;
3158 arch_has_thumb2_nop (struct elf32_arm_link_hash_table *globals)
3160 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3162 return (arch == TAG_CPU_ARCH_V6T2 || arch == TAG_CPU_ARCH_V7
3163 || arch == TAG_CPU_ARCH_V7E_M);
3167 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
3171 case arm_stub_long_branch_thumb_only:
3172 case arm_stub_long_branch_v4t_thumb_arm:
3173 case arm_stub_short_branch_v4t_thumb_arm:
3174 case arm_stub_long_branch_v4t_thumb_arm_pic:
3175 case arm_stub_long_branch_thumb_only_pic:
3186 /* Determine the type of stub needed, if any, for a call. */
3188 static enum elf32_arm_stub_type
3189 arm_type_of_stub (struct bfd_link_info *info,
3190 asection *input_sec,
3191 const Elf_Internal_Rela *rel,
3192 int *actual_st_type,
3193 struct elf32_arm_link_hash_entry *hash,
3194 bfd_vma destination,
3200 bfd_signed_vma branch_offset;
3201 unsigned int r_type;
3202 struct elf32_arm_link_hash_table * globals;
3205 enum elf32_arm_stub_type stub_type = arm_stub_none;
3207 int st_type = *actual_st_type;
3209 /* We don't know the actual type of destination in case it is of
3210 type STT_SECTION: give up. */
3211 if (st_type == STT_SECTION)
3214 globals = elf32_arm_hash_table (info);
3215 if (globals == NULL)
3218 thumb_only = using_thumb_only (globals);
3220 thumb2 = using_thumb2 (globals);
3222 /* Determine where the call point is. */
3223 location = (input_sec->output_offset
3224 + input_sec->output_section->vma
3227 r_type = ELF32_R_TYPE (rel->r_info);
3229 /* Keep a simpler condition, for the sake of clarity. */
3230 if (globals->root.splt != NULL
3232 && hash->root.plt.offset != (bfd_vma) -1)
3236 /* Note when dealing with PLT entries: the main PLT stub is in
3237 ARM mode, so if the branch is in Thumb mode, another
3238 Thumb->ARM stub will be inserted later just before the ARM
3239 PLT stub. We don't take this extra distance into account
3240 here, because if a long branch stub is needed, we'll add a
3241 Thumb->Arm one and branch directly to the ARM PLT entry
3242 because it avoids spreading offset corrections in several
3245 destination = (globals->root.splt->output_section->vma
3246 + globals->root.splt->output_offset
3247 + hash->root.plt.offset);
3251 branch_offset = (bfd_signed_vma)(destination - location);
3253 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3254 || r_type == R_ARM_THM_TLS_CALL)
3256 /* Handle cases where:
3257 - this call goes too far (different Thumb/Thumb2 max
3259 - it's a Thumb->Arm call and blx is not available, or it's a
3260 Thumb->Arm branch (not bl). A stub is needed in this case,
3261 but only if this call is not through a PLT entry. Indeed,
3262 PLT stubs handle mode switching already.
3265 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
3266 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
3268 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
3269 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
3270 || ((st_type != STT_ARM_TFUNC)
3271 && (((r_type == R_ARM_THM_CALL
3272 || r_type == R_ARM_THM_TLS_CALL) && !globals->use_blx)
3273 || (r_type == R_ARM_THM_JUMP24))
3276 if (st_type == STT_ARM_TFUNC)
3278 /* Thumb to thumb. */
3281 stub_type = (info->shared | globals->pic_veneer)
3283 ? ((globals->use_blx
3284 && (r_type ==R_ARM_THM_CALL))
3285 /* V5T and above. Stub starts with ARM code, so
3286 we must be able to switch mode before
3287 reaching it, which is only possible for 'bl'
3288 (ie R_ARM_THM_CALL relocation). */
3289 ? arm_stub_long_branch_any_thumb_pic
3290 /* On V4T, use Thumb code only. */
3291 : arm_stub_long_branch_v4t_thumb_thumb_pic)
3293 /* non-PIC stubs. */
3294 : ((globals->use_blx
3295 && (r_type ==R_ARM_THM_CALL))
3296 /* V5T and above. */
3297 ? arm_stub_long_branch_any_any
3299 : arm_stub_long_branch_v4t_thumb_thumb);
3303 stub_type = (info->shared | globals->pic_veneer)
3305 ? arm_stub_long_branch_thumb_only_pic
3307 : arm_stub_long_branch_thumb_only;
3314 && sym_sec->owner != NULL
3315 && !INTERWORK_FLAG (sym_sec->owner))
3317 (*_bfd_error_handler)
3318 (_("%B(%s): warning: interworking not enabled.\n"
3319 " first occurrence: %B: Thumb call to ARM"),
3320 sym_sec->owner, input_bfd, name);
3324 (info->shared | globals->pic_veneer)
3326 ? (r_type == R_ARM_THM_TLS_CALL
3328 ? (globals->use_blx ? arm_stub_long_branch_any_tls_pic
3329 : arm_stub_long_branch_v4t_thumb_tls_pic)
3330 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
3331 /* V5T PIC and above. */
3332 ? arm_stub_long_branch_any_arm_pic
3334 : arm_stub_long_branch_v4t_thumb_arm_pic))
3336 /* non-PIC stubs. */
3337 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
3338 /* V5T and above. */
3339 ? arm_stub_long_branch_any_any
3341 : arm_stub_long_branch_v4t_thumb_arm);
3343 /* Handle v4t short branches. */
3344 if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
3345 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
3346 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
3347 stub_type = arm_stub_short_branch_v4t_thumb_arm;
3351 else if (r_type == R_ARM_CALL
3352 || r_type == R_ARM_JUMP24
3353 || r_type == R_ARM_PLT32
3354 || r_type == R_ARM_TLS_CALL)
3356 if (st_type == STT_ARM_TFUNC)
3361 && sym_sec->owner != NULL
3362 && !INTERWORK_FLAG (sym_sec->owner))
3364 (*_bfd_error_handler)
3365 (_("%B(%s): warning: interworking not enabled.\n"
3366 " first occurrence: %B: ARM call to Thumb"),
3367 sym_sec->owner, input_bfd, name);
3370 /* We have an extra 2-bytes reach because of
3371 the mode change (bit 24 (H) of BLX encoding). */
3372 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
3373 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
3374 || (r_type == R_ARM_CALL && !globals->use_blx)
3375 || (r_type == R_ARM_JUMP24)
3376 || (r_type == R_ARM_PLT32))
3378 stub_type = (info->shared | globals->pic_veneer)
3380 ? ((globals->use_blx)
3381 /* V5T and above. */
3382 ? arm_stub_long_branch_any_thumb_pic
3384 : arm_stub_long_branch_v4t_arm_thumb_pic)
3386 /* non-PIC stubs. */
3387 : ((globals->use_blx)
3388 /* V5T and above. */
3389 ? arm_stub_long_branch_any_any
3391 : arm_stub_long_branch_v4t_arm_thumb);
3397 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
3398 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
3401 (info->shared | globals->pic_veneer)
3403 ? (r_type == R_ARM_TLS_CALL
3405 ? arm_stub_long_branch_any_tls_pic
3406 : arm_stub_long_branch_any_arm_pic)
3407 /* non-PIC stubs. */
3408 : arm_stub_long_branch_any_any;
3413 /* If a stub is needed, record the actual destination type. */
3414 if (stub_type != arm_stub_none)
3415 *actual_st_type = st_type;
3420 /* Build a name for an entry in the stub hash table. */
3423 elf32_arm_stub_name (const asection *input_section,
3424 const asection *sym_sec,
3425 const struct elf32_arm_link_hash_entry *hash,
3426 const Elf_Internal_Rela *rel,
3427 enum elf32_arm_stub_type stub_type)
3434 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1 + 2 + 1;
3435 stub_name = (char *) bfd_malloc (len);
3436 if (stub_name != NULL)
3437 sprintf (stub_name, "%08x_%s+%x_%d",
3438 input_section->id & 0xffffffff,
3439 hash->root.root.root.string,
3440 (int) rel->r_addend & 0xffffffff,
3445 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
3446 stub_name = (char *) bfd_malloc (len);
3447 if (stub_name != NULL)
3448 sprintf (stub_name, "%08x_%x:%x+%x_%d",
3449 input_section->id & 0xffffffff,
3450 sym_sec->id & 0xffffffff,
3451 ELF32_R_TYPE (rel->r_info) == R_ARM_TLS_CALL
3452 || ELF32_R_TYPE (rel->r_info) == R_ARM_THM_TLS_CALL
3453 ? 0 : (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
3454 (int) rel->r_addend & 0xffffffff,
3461 /* Look up an entry in the stub hash. Stub entries are cached because
3462 creating the stub name takes a bit of time. */
3464 static struct elf32_arm_stub_hash_entry *
3465 elf32_arm_get_stub_entry (const asection *input_section,
3466 const asection *sym_sec,
3467 struct elf_link_hash_entry *hash,
3468 const Elf_Internal_Rela *rel,
3469 struct elf32_arm_link_hash_table *htab,
3470 enum elf32_arm_stub_type stub_type)
3472 struct elf32_arm_stub_hash_entry *stub_entry;
3473 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
3474 const asection *id_sec;
3476 if ((input_section->flags & SEC_CODE) == 0)
3479 /* If this input section is part of a group of sections sharing one
3480 stub section, then use the id of the first section in the group.
3481 Stub names need to include a section id, as there may well be
3482 more than one stub used to reach say, printf, and we need to
3483 distinguish between them. */
3484 id_sec = htab->stub_group[input_section->id].link_sec;
3486 if (h != NULL && h->stub_cache != NULL
3487 && h->stub_cache->h == h
3488 && h->stub_cache->id_sec == id_sec
3489 && h->stub_cache->stub_type == stub_type)
3491 stub_entry = h->stub_cache;
3497 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel, stub_type);
3498 if (stub_name == NULL)
3501 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
3502 stub_name, FALSE, FALSE);
3504 h->stub_cache = stub_entry;
3512 /* Find or create a stub section. Returns a pointer to the stub section, and
3513 the section to which the stub section will be attached (in *LINK_SEC_P).
3514 LINK_SEC_P may be NULL. */
3517 elf32_arm_create_or_find_stub_sec (asection **link_sec_p, asection *section,
3518 struct elf32_arm_link_hash_table *htab)
3523 link_sec = htab->stub_group[section->id].link_sec;
3524 stub_sec = htab->stub_group[section->id].stub_sec;
3525 if (stub_sec == NULL)
3527 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3528 if (stub_sec == NULL)
3534 namelen = strlen (link_sec->name);
3535 len = namelen + sizeof (STUB_SUFFIX);
3536 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
3540 memcpy (s_name, link_sec->name, namelen);
3541 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3542 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3543 if (stub_sec == NULL)
3545 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3547 htab->stub_group[section->id].stub_sec = stub_sec;
3551 *link_sec_p = link_sec;
3556 /* Add a new stub entry to the stub hash. Not all fields of the new
3557 stub entry are initialised. */
3559 static struct elf32_arm_stub_hash_entry *
3560 elf32_arm_add_stub (const char *stub_name,
3562 struct elf32_arm_link_hash_table *htab)
3566 struct elf32_arm_stub_hash_entry *stub_entry;
3568 stub_sec = elf32_arm_create_or_find_stub_sec (&link_sec, section, htab);
3569 if (stub_sec == NULL)
3572 /* Enter this entry into the linker stub hash table. */
3573 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3575 if (stub_entry == NULL)
3577 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3583 stub_entry->stub_sec = stub_sec;
3584 stub_entry->stub_offset = 0;
3585 stub_entry->id_sec = link_sec;
3590 /* Store an Arm insn into an output section not processed by
3591 elf32_arm_write_section. */
3594 put_arm_insn (struct elf32_arm_link_hash_table * htab,
3595 bfd * output_bfd, bfd_vma val, void * ptr)
3597 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3598 bfd_putl32 (val, ptr);
3600 bfd_putb32 (val, ptr);
3603 /* Store a 16-bit Thumb insn into an output section not processed by
3604 elf32_arm_write_section. */
3607 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
3608 bfd * output_bfd, bfd_vma val, void * ptr)
3610 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3611 bfd_putl16 (val, ptr);
3613 bfd_putb16 (val, ptr);
3616 /* If it's possible to change R_TYPE to a more efficient access
3617 model, return the new reloc type. */
3620 elf32_arm_tls_transition (struct bfd_link_info *info, int r_type,
3621 struct elf_link_hash_entry *h)
3623 int is_local = (h == NULL);
3625 if (info->shared || (h && h->root.type == bfd_link_hash_undefweak))
3628 /* We do not support relaxations for Old TLS models. */
3631 case R_ARM_TLS_GOTDESC:
3632 case R_ARM_TLS_CALL:
3633 case R_ARM_THM_TLS_CALL:
3634 case R_ARM_TLS_DESCSEQ:
3635 case R_ARM_THM_TLS_DESCSEQ:
3636 return is_local ? R_ARM_TLS_LE32 : R_ARM_TLS_IE32;
3642 static bfd_reloc_status_type elf32_arm_final_link_relocate
3643 (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
3644 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
3645 const char *, int, struct elf_link_hash_entry *, bfd_boolean *, char **);
3648 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type)
3652 case arm_stub_a8_veneer_b_cond:
3653 case arm_stub_a8_veneer_b:
3654 case arm_stub_a8_veneer_bl:
3657 case arm_stub_long_branch_any_any:
3658 case arm_stub_long_branch_v4t_arm_thumb:
3659 case arm_stub_long_branch_thumb_only:
3660 case arm_stub_long_branch_v4t_thumb_thumb:
3661 case arm_stub_long_branch_v4t_thumb_arm:
3662 case arm_stub_short_branch_v4t_thumb_arm:
3663 case arm_stub_long_branch_any_arm_pic:
3664 case arm_stub_long_branch_any_thumb_pic:
3665 case arm_stub_long_branch_v4t_thumb_thumb_pic:
3666 case arm_stub_long_branch_v4t_arm_thumb_pic:
3667 case arm_stub_long_branch_v4t_thumb_arm_pic:
3668 case arm_stub_long_branch_thumb_only_pic:
3669 case arm_stub_long_branch_any_tls_pic:
3670 case arm_stub_long_branch_v4t_thumb_tls_pic:
3671 case arm_stub_a8_veneer_blx:
3675 abort (); /* Should be unreachable. */
3680 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
3684 struct elf32_arm_stub_hash_entry *stub_entry;
3685 struct elf32_arm_link_hash_table *globals;
3686 struct bfd_link_info *info;
3693 const insn_sequence *template_sequence;
3695 int stub_reloc_idx[MAXRELOCS] = {-1, -1};
3696 int stub_reloc_offset[MAXRELOCS] = {0, 0};
3699 /* Massage our args to the form they really have. */
3700 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3701 info = (struct bfd_link_info *) in_arg;
3703 globals = elf32_arm_hash_table (info);
3704 if (globals == NULL)
3707 stub_sec = stub_entry->stub_sec;
3709 if ((globals->fix_cortex_a8 < 0)
3710 != (arm_stub_required_alignment (stub_entry->stub_type) == 2))
3711 /* We have to do less-strictly-aligned fixes last. */
3714 /* Make a note of the offset within the stubs for this entry. */
3715 stub_entry->stub_offset = stub_sec->size;
3716 loc = stub_sec->contents + stub_entry->stub_offset;
3718 stub_bfd = stub_sec->owner;
3720 /* This is the address of the stub destination. */
3721 sym_value = (stub_entry->target_value
3722 + stub_entry->target_section->output_offset
3723 + stub_entry->target_section->output_section->vma);
3725 template_sequence = stub_entry->stub_template;
3726 template_size = stub_entry->stub_template_size;
3729 for (i = 0; i < template_size; i++)
3731 switch (template_sequence[i].type)
3735 bfd_vma data = (bfd_vma) template_sequence[i].data;
3736 if (template_sequence[i].reloc_addend != 0)
3738 /* We've borrowed the reloc_addend field to mean we should
3739 insert a condition code into this (Thumb-1 branch)
3740 instruction. See THUMB16_BCOND_INSN. */
3741 BFD_ASSERT ((data & 0xff00) == 0xd000);
3742 data |= ((stub_entry->orig_insn >> 22) & 0xf) << 8;
3744 bfd_put_16 (stub_bfd, data, loc + size);
3750 bfd_put_16 (stub_bfd,
3751 (template_sequence[i].data >> 16) & 0xffff,
3753 bfd_put_16 (stub_bfd, template_sequence[i].data & 0xffff,
3755 if (template_sequence[i].r_type != R_ARM_NONE)
3757 stub_reloc_idx[nrelocs] = i;
3758 stub_reloc_offset[nrelocs++] = size;
3764 bfd_put_32 (stub_bfd, template_sequence[i].data,
3766 /* Handle cases where the target is encoded within the
3768 if (template_sequence[i].r_type == R_ARM_JUMP24)
3770 stub_reloc_idx[nrelocs] = i;
3771 stub_reloc_offset[nrelocs++] = size;
3777 bfd_put_32 (stub_bfd, template_sequence[i].data, loc + size);
3778 stub_reloc_idx[nrelocs] = i;
3779 stub_reloc_offset[nrelocs++] = size;
3789 stub_sec->size += size;
3791 /* Stub size has already been computed in arm_size_one_stub. Check
3793 BFD_ASSERT (size == stub_entry->stub_size);
3795 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3796 if (stub_entry->st_type == STT_ARM_TFUNC)
3799 /* Assume there is at least one and at most MAXRELOCS entries to relocate
3801 BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS);
3803 for (i = 0; i < nrelocs; i++)
3804 if (template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_JUMP24
3805 || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_JUMP19
3806 || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_CALL
3807 || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_XPC22)
3809 Elf_Internal_Rela rel;
3810 bfd_boolean unresolved_reloc;
3811 char *error_message;
3813 = (template_sequence[stub_reloc_idx[i]].r_type != R_ARM_THM_XPC22)
3814 ? STT_ARM_TFUNC : 0;
3815 bfd_vma points_to = sym_value + stub_entry->target_addend;
3817 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
3818 rel.r_info = ELF32_R_INFO (0,
3819 template_sequence[stub_reloc_idx[i]].r_type);
3820 rel.r_addend = template_sequence[stub_reloc_idx[i]].reloc_addend;
3822 if (stub_entry->stub_type == arm_stub_a8_veneer_b_cond && i == 0)
3823 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
3824 template should refer back to the instruction after the original
3826 points_to = sym_value;
3828 /* There may be unintended consequences if this is not true. */
3829 BFD_ASSERT (stub_entry->h == NULL);
3831 /* Note: _bfd_final_link_relocate doesn't handle these relocations
3832 properly. We should probably use this function unconditionally,
3833 rather than only for certain relocations listed in the enclosing
3834 conditional, for the sake of consistency. */
3835 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3836 (template_sequence[stub_reloc_idx[i]].r_type),
3837 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
3838 points_to, info, stub_entry->target_section, "", sym_flags,
3839 (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc,
3844 Elf_Internal_Rela rel;
3845 bfd_boolean unresolved_reloc;
3846 char *error_message;
3847 bfd_vma points_to = sym_value + stub_entry->target_addend
3848 + template_sequence[stub_reloc_idx[i]].reloc_addend;
3850 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
3851 rel.r_info = ELF32_R_INFO (0,
3852 template_sequence[stub_reloc_idx[i]].r_type);
3855 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3856 (template_sequence[stub_reloc_idx[i]].r_type),
3857 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
3858 points_to, info, stub_entry->target_section, "", stub_entry->st_type,
3859 (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc,
3867 /* Calculate the template, template size and instruction size for a stub.
3868 Return value is the instruction size. */
3871 find_stub_size_and_template (enum elf32_arm_stub_type stub_type,
3872 const insn_sequence **stub_template,
3873 int *stub_template_size)
3875 const insn_sequence *template_sequence = NULL;
3876 int template_size = 0, i;
3879 template_sequence = stub_definitions[stub_type].template_sequence;
3881 *stub_template = template_sequence;
3883 template_size = stub_definitions[stub_type].template_size;
3884 if (stub_template_size)
3885 *stub_template_size = template_size;
3888 for (i = 0; i < template_size; i++)
3890 switch (template_sequence[i].type)
3911 /* As above, but don't actually build the stub. Just bump offset so
3912 we know stub section sizes. */
3915 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
3916 void *in_arg ATTRIBUTE_UNUSED)
3918 struct elf32_arm_stub_hash_entry *stub_entry;
3919 const insn_sequence *template_sequence;
3920 int template_size, size;
3922 /* Massage our args to the form they really have. */
3923 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3925 BFD_ASSERT((stub_entry->stub_type > arm_stub_none)
3926 && stub_entry->stub_type < ARRAY_SIZE(stub_definitions));
3928 size = find_stub_size_and_template (stub_entry->stub_type, &template_sequence,
3931 stub_entry->stub_size = size;
3932 stub_entry->stub_template = template_sequence;
3933 stub_entry->stub_template_size = template_size;
3935 size = (size + 7) & ~7;
3936 stub_entry->stub_sec->size += size;
3941 /* External entry points for sizing and building linker stubs. */
3943 /* Set up various things so that we can make a list of input sections
3944 for each output section included in the link. Returns -1 on error,
3945 0 when no stubs will be needed, and 1 on success. */
3948 elf32_arm_setup_section_lists (bfd *output_bfd,
3949 struct bfd_link_info *info)
3952 unsigned int bfd_count;
3953 int top_id, top_index;
3955 asection **input_list, **list;
3957 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3961 if (! is_elf_hash_table (htab))
3964 /* Count the number of input BFDs and find the top input section id. */
3965 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3967 input_bfd = input_bfd->link_next)
3970 for (section = input_bfd->sections;
3972 section = section->next)
3974 if (top_id < section->id)
3975 top_id = section->id;
3978 htab->bfd_count = bfd_count;
3980 amt = sizeof (struct map_stub) * (top_id + 1);
3981 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
3982 if (htab->stub_group == NULL)
3984 htab->top_id = top_id;
3986 /* We can't use output_bfd->section_count here to find the top output
3987 section index as some sections may have been removed, and
3988 _bfd_strip_section_from_output doesn't renumber the indices. */
3989 for (section = output_bfd->sections, top_index = 0;
3991 section = section->next)
3993 if (top_index < section->index)
3994 top_index = section->index;
3997 htab->top_index = top_index;
3998 amt = sizeof (asection *) * (top_index + 1);
3999 input_list = (asection **) bfd_malloc (amt);
4000 htab->input_list = input_list;
4001 if (input_list == NULL)
4004 /* For sections we aren't interested in, mark their entries with a
4005 value we can check later. */
4006 list = input_list + top_index;
4008 *list = bfd_abs_section_ptr;
4009 while (list-- != input_list);
4011 for (section = output_bfd->sections;
4013 section = section->next)
4015 if ((section->flags & SEC_CODE) != 0)
4016 input_list[section->index] = NULL;
4022 /* The linker repeatedly calls this function for each input section,
4023 in the order that input sections are linked into output sections.
4024 Build lists of input sections to determine groupings between which
4025 we may insert linker stubs. */
4028 elf32_arm_next_input_section (struct bfd_link_info *info,
4031 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4036 if (isec->output_section->index <= htab->top_index)
4038 asection **list = htab->input_list + isec->output_section->index;
4040 if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0)
4042 /* Steal the link_sec pointer for our list. */
4043 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4044 /* This happens to make the list in reverse order,
4045 which we reverse later. */
4046 PREV_SEC (isec) = *list;
4052 /* See whether we can group stub sections together. Grouping stub
4053 sections may result in fewer stubs. More importantly, we need to
4054 put all .init* and .fini* stubs at the end of the .init or
4055 .fini output sections respectively, because glibc splits the
4056 _init and _fini functions into multiple parts. Putting a stub in
4057 the middle of a function is not a good idea. */
4060 group_sections (struct elf32_arm_link_hash_table *htab,
4061 bfd_size_type stub_group_size,
4062 bfd_boolean stubs_always_after_branch)
4064 asection **list = htab->input_list;
4068 asection *tail = *list;
4071 if (tail == bfd_abs_section_ptr)
4074 /* Reverse the list: we must avoid placing stubs at the
4075 beginning of the section because the beginning of the text
4076 section may be required for an interrupt vector in bare metal
4078 #define NEXT_SEC PREV_SEC
4080 while (tail != NULL)
4082 /* Pop from tail. */
4083 asection *item = tail;
4084 tail = PREV_SEC (item);
4087 NEXT_SEC (item) = head;
4091 while (head != NULL)
4095 bfd_vma stub_group_start = head->output_offset;
4096 bfd_vma end_of_next;
4099 while (NEXT_SEC (curr) != NULL)
4101 next = NEXT_SEC (curr);
4102 end_of_next = next->output_offset + next->size;
4103 if (end_of_next - stub_group_start >= stub_group_size)
4104 /* End of NEXT is too far from start, so stop. */
4106 /* Add NEXT to the group. */
4110 /* OK, the size from the start to the start of CURR is less
4111 than stub_group_size and thus can be handled by one stub
4112 section. (Or the head section is itself larger than
4113 stub_group_size, in which case we may be toast.)
4114 We should really be keeping track of the total size of
4115 stubs added here, as stubs contribute to the final output
4119 next = NEXT_SEC (head);
4120 /* Set up this stub group. */
4121 htab->stub_group[head->id].link_sec = curr;
4123 while (head != curr && (head = next) != NULL);
4125 /* But wait, there's more! Input sections up to stub_group_size
4126 bytes after the stub section can be handled by it too. */
4127 if (!stubs_always_after_branch)
4129 stub_group_start = curr->output_offset + curr->size;
4131 while (next != NULL)
4133 end_of_next = next->output_offset + next->size;
4134 if (end_of_next - stub_group_start >= stub_group_size)
4135 /* End of NEXT is too far from stubs, so stop. */
4137 /* Add NEXT to the stub group. */
4139 next = NEXT_SEC (head);
4140 htab->stub_group[head->id].link_sec = curr;
4146 while (list++ != htab->input_list + htab->top_index);
4148 free (htab->input_list);
4153 /* Comparison function for sorting/searching relocations relating to Cortex-A8
4157 a8_reloc_compare (const void *a, const void *b)
4159 const struct a8_erratum_reloc *ra = (const struct a8_erratum_reloc *) a;
4160 const struct a8_erratum_reloc *rb = (const struct a8_erratum_reloc *) b;
4162 if (ra->from < rb->from)
4164 else if (ra->from > rb->from)
4170 static struct elf_link_hash_entry *find_thumb_glue (struct bfd_link_info *,
4171 const char *, char **);
4173 /* Helper function to scan code for sequences which might trigger the Cortex-A8
4174 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
4175 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
4179 cortex_a8_erratum_scan (bfd *input_bfd,
4180 struct bfd_link_info *info,
4181 struct a8_erratum_fix **a8_fixes_p,
4182 unsigned int *num_a8_fixes_p,
4183 unsigned int *a8_fix_table_size_p,
4184 struct a8_erratum_reloc *a8_relocs,
4185 unsigned int num_a8_relocs,
4186 unsigned prev_num_a8_fixes,
4187 bfd_boolean *stub_changed_p)
4190 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4191 struct a8_erratum_fix *a8_fixes = *a8_fixes_p;
4192 unsigned int num_a8_fixes = *num_a8_fixes_p;
4193 unsigned int a8_fix_table_size = *a8_fix_table_size_p;
4198 for (section = input_bfd->sections;
4200 section = section->next)
4202 bfd_byte *contents = NULL;
4203 struct _arm_elf_section_data *sec_data;
4207 if (elf_section_type (section) != SHT_PROGBITS
4208 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
4209 || (section->flags & SEC_EXCLUDE) != 0
4210 || (section->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
4211 || (section->output_section == bfd_abs_section_ptr))
4214 base_vma = section->output_section->vma + section->output_offset;
4216 if (elf_section_data (section)->this_hdr.contents != NULL)
4217 contents = elf_section_data (section)->this_hdr.contents;
4218 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
4221 sec_data = elf32_arm_section_data (section);
4223 for (span = 0; span < sec_data->mapcount; span++)
4225 unsigned int span_start = sec_data->map[span].vma;
4226 unsigned int span_end = (span == sec_data->mapcount - 1)
4227 ? section->size : sec_data->map[span + 1].vma;
4229 char span_type = sec_data->map[span].type;
4230 bfd_boolean last_was_32bit = FALSE, last_was_branch = FALSE;
4232 if (span_type != 't')
4235 /* Span is entirely within a single 4KB region: skip scanning. */
4236 if (((base_vma + span_start) & ~0xfff)
4237 == ((base_vma + span_end) & ~0xfff))
4240 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4242 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4243 * The branch target is in the same 4KB region as the
4244 first half of the branch.
4245 * The instruction before the branch is a 32-bit
4246 length non-branch instruction. */
4247 for (i = span_start; i < span_end;)
4249 unsigned int insn = bfd_getl16 (&contents[i]);
4250 bfd_boolean insn_32bit = FALSE, is_blx = FALSE, is_b = FALSE;
4251 bfd_boolean is_bl = FALSE, is_bcc = FALSE, is_32bit_branch;
4253 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
4258 /* Load the rest of the insn (in manual-friendly order). */
4259 insn = (insn << 16) | bfd_getl16 (&contents[i + 2]);
4261 /* Encoding T4: B<c>.W. */
4262 is_b = (insn & 0xf800d000) == 0xf0009000;
4263 /* Encoding T1: BL<c>.W. */
4264 is_bl = (insn & 0xf800d000) == 0xf000d000;
4265 /* Encoding T2: BLX<c>.W. */
4266 is_blx = (insn & 0xf800d000) == 0xf000c000;
4267 /* Encoding T3: B<c>.W (not permitted in IT block). */
4268 is_bcc = (insn & 0xf800d000) == 0xf0008000
4269 && (insn & 0x07f00000) != 0x03800000;
4272 is_32bit_branch = is_b || is_bl || is_blx || is_bcc;
4274 if (((base_vma + i) & 0xfff) == 0xffe
4278 && ! last_was_branch)
4280 bfd_signed_vma offset = 0;
4281 bfd_boolean force_target_arm = FALSE;
4282 bfd_boolean force_target_thumb = FALSE;
4284 enum elf32_arm_stub_type stub_type = arm_stub_none;
4285 struct a8_erratum_reloc key, *found;
4287 key.from = base_vma + i;
4288 found = (struct a8_erratum_reloc *)
4289 bsearch (&key, a8_relocs, num_a8_relocs,
4290 sizeof (struct a8_erratum_reloc),
4295 char *error_message = NULL;
4296 struct elf_link_hash_entry *entry;
4297 bfd_boolean use_plt = FALSE;
4299 /* We don't care about the error returned from this
4300 function, only if there is glue or not. */
4301 entry = find_thumb_glue (info, found->sym_name,
4305 found->non_a8_stub = TRUE;
4307 /* Keep a simpler condition, for the sake of clarity. */
4308 if (htab->root.splt != NULL && found->hash != NULL
4309 && found->hash->root.plt.offset != (bfd_vma) -1)
4312 if (found->r_type == R_ARM_THM_CALL)
4314 if (found->st_type != STT_ARM_TFUNC || use_plt)
4315 force_target_arm = TRUE;
4317 force_target_thumb = TRUE;
4321 /* Check if we have an offending branch instruction. */
4323 if (found && found->non_a8_stub)
4324 /* We've already made a stub for this instruction, e.g.
4325 it's a long branch or a Thumb->ARM stub. Assume that
4326 stub will suffice to work around the A8 erratum (see
4327 setting of always_after_branch above). */
4331 offset = (insn & 0x7ff) << 1;
4332 offset |= (insn & 0x3f0000) >> 4;
4333 offset |= (insn & 0x2000) ? 0x40000 : 0;
4334 offset |= (insn & 0x800) ? 0x80000 : 0;
4335 offset |= (insn & 0x4000000) ? 0x100000 : 0;
4336 if (offset & 0x100000)
4337 offset |= ~ ((bfd_signed_vma) 0xfffff);
4338 stub_type = arm_stub_a8_veneer_b_cond;
4340 else if (is_b || is_bl || is_blx)
4342 int s = (insn & 0x4000000) != 0;
4343 int j1 = (insn & 0x2000) != 0;
4344 int j2 = (insn & 0x800) != 0;
4348 offset = (insn & 0x7ff) << 1;
4349 offset |= (insn & 0x3ff0000) >> 4;
4353 if (offset & 0x1000000)
4354 offset |= ~ ((bfd_signed_vma) 0xffffff);
4357 offset &= ~ ((bfd_signed_vma) 3);
4359 stub_type = is_blx ? arm_stub_a8_veneer_blx :
4360 is_bl ? arm_stub_a8_veneer_bl : arm_stub_a8_veneer_b;
4363 if (stub_type != arm_stub_none)
4365 bfd_vma pc_for_insn = base_vma + i + 4;
4367 /* The original instruction is a BL, but the target is
4368 an ARM instruction. If we were not making a stub,
4369 the BL would have been converted to a BLX. Use the
4370 BLX stub instead in that case. */
4371 if (htab->use_blx && force_target_arm
4372 && stub_type == arm_stub_a8_veneer_bl)
4374 stub_type = arm_stub_a8_veneer_blx;
4378 /* Conversely, if the original instruction was
4379 BLX but the target is Thumb mode, use the BL
4381 else if (force_target_thumb
4382 && stub_type == arm_stub_a8_veneer_blx)
4384 stub_type = arm_stub_a8_veneer_bl;
4390 pc_for_insn &= ~ ((bfd_vma) 3);
4392 /* If we found a relocation, use the proper destination,
4393 not the offset in the (unrelocated) instruction.
4394 Note this is always done if we switched the stub type
4398 (bfd_signed_vma) (found->destination - pc_for_insn);
4400 target = pc_for_insn + offset;
4402 /* The BLX stub is ARM-mode code. Adjust the offset to
4403 take the different PC value (+8 instead of +4) into
4405 if (stub_type == arm_stub_a8_veneer_blx)
4408 if (((base_vma + i) & ~0xfff) == (target & ~0xfff))
4410 char *stub_name = NULL;
4412 if (num_a8_fixes == a8_fix_table_size)
4414 a8_fix_table_size *= 2;
4415 a8_fixes = (struct a8_erratum_fix *)
4416 bfd_realloc (a8_fixes,
4417 sizeof (struct a8_erratum_fix)
4418 * a8_fix_table_size);
4421 if (num_a8_fixes < prev_num_a8_fixes)
4423 /* If we're doing a subsequent scan,
4424 check if we've found the same fix as
4425 before, and try and reuse the stub
4427 stub_name = a8_fixes[num_a8_fixes].stub_name;
4428 if ((a8_fixes[num_a8_fixes].section != section)
4429 || (a8_fixes[num_a8_fixes].offset != i))
4433 *stub_changed_p = TRUE;
4439 stub_name = (char *) bfd_malloc (8 + 1 + 8 + 1);
4440 if (stub_name != NULL)
4441 sprintf (stub_name, "%x:%x", section->id, i);
4444 a8_fixes[num_a8_fixes].input_bfd = input_bfd;
4445 a8_fixes[num_a8_fixes].section = section;
4446 a8_fixes[num_a8_fixes].offset = i;
4447 a8_fixes[num_a8_fixes].addend = offset;
4448 a8_fixes[num_a8_fixes].orig_insn = insn;
4449 a8_fixes[num_a8_fixes].stub_name = stub_name;
4450 a8_fixes[num_a8_fixes].stub_type = stub_type;
4451 a8_fixes[num_a8_fixes].st_type =
4452 is_blx ? STT_FUNC : STT_ARM_TFUNC;
4459 i += insn_32bit ? 4 : 2;
4460 last_was_32bit = insn_32bit;
4461 last_was_branch = is_32bit_branch;
4465 if (elf_section_data (section)->this_hdr.contents == NULL)
4469 *a8_fixes_p = a8_fixes;
4470 *num_a8_fixes_p = num_a8_fixes;
4471 *a8_fix_table_size_p = a8_fix_table_size;
4476 /* Determine and set the size of the stub section for a final link.
4478 The basic idea here is to examine all the relocations looking for
4479 PC-relative calls to a target that is unreachable with a "bl"
4483 elf32_arm_size_stubs (bfd *output_bfd,
4485 struct bfd_link_info *info,
4486 bfd_signed_vma group_size,
4487 asection * (*add_stub_section) (const char *, asection *),
4488 void (*layout_sections_again) (void))
4490 bfd_size_type stub_group_size;
4491 bfd_boolean stubs_always_after_branch;
4492 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4493 struct a8_erratum_fix *a8_fixes = NULL;
4494 unsigned int num_a8_fixes = 0, a8_fix_table_size = 10;
4495 struct a8_erratum_reloc *a8_relocs = NULL;
4496 unsigned int num_a8_relocs = 0, a8_reloc_table_size = 10, i;
4501 if (htab->fix_cortex_a8)
4503 a8_fixes = (struct a8_erratum_fix *)
4504 bfd_zmalloc (sizeof (struct a8_erratum_fix) * a8_fix_table_size);
4505 a8_relocs = (struct a8_erratum_reloc *)
4506 bfd_zmalloc (sizeof (struct a8_erratum_reloc) * a8_reloc_table_size);
4509 /* Propagate mach to stub bfd, because it may not have been
4510 finalized when we created stub_bfd. */
4511 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
4512 bfd_get_mach (output_bfd));
4514 /* Stash our params away. */
4515 htab->stub_bfd = stub_bfd;
4516 htab->add_stub_section = add_stub_section;
4517 htab->layout_sections_again = layout_sections_again;
4518 stubs_always_after_branch = group_size < 0;
4520 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4521 as the first half of a 32-bit branch straddling two 4K pages. This is a
4522 crude way of enforcing that. */
4523 if (htab->fix_cortex_a8)
4524 stubs_always_after_branch = 1;
4527 stub_group_size = -group_size;
4529 stub_group_size = group_size;
4531 if (stub_group_size == 1)
4533 /* Default values. */
4534 /* Thumb branch range is +-4MB has to be used as the default
4535 maximum size (a given section can contain both ARM and Thumb
4536 code, so the worst case has to be taken into account).
4538 This value is 24K less than that, which allows for 2025
4539 12-byte stubs. If we exceed that, then we will fail to link.
4540 The user will have to relink with an explicit group size
4542 stub_group_size = 4170000;
4545 group_sections (htab, stub_group_size, stubs_always_after_branch);
4547 /* If we're applying the cortex A8 fix, we need to determine the
4548 program header size now, because we cannot change it later --
4549 that could alter section placements. Notice the A8 erratum fix
4550 ends up requiring the section addresses to remain unchanged
4551 modulo the page size. That's something we cannot represent
4552 inside BFD, and we don't want to force the section alignment to
4553 be the page size. */
4554 if (htab->fix_cortex_a8)
4555 (*htab->layout_sections_again) ();
4560 unsigned int bfd_indx;
4562 bfd_boolean stub_changed = FALSE;
4563 unsigned prev_num_a8_fixes = num_a8_fixes;
4566 for (input_bfd = info->input_bfds, bfd_indx = 0;
4568 input_bfd = input_bfd->link_next, bfd_indx++)
4570 Elf_Internal_Shdr *symtab_hdr;
4572 Elf_Internal_Sym *local_syms = NULL;
4576 /* We'll need the symbol table in a second. */
4577 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4578 if (symtab_hdr->sh_info == 0)
4581 /* Walk over each section attached to the input bfd. */
4582 for (section = input_bfd->sections;
4584 section = section->next)
4586 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4588 /* If there aren't any relocs, then there's nothing more
4590 if ((section->flags & SEC_RELOC) == 0
4591 || section->reloc_count == 0
4592 || (section->flags & SEC_CODE) == 0)
4595 /* If this section is a link-once section that will be
4596 discarded, then don't create any stubs. */
4597 if (section->output_section == NULL
4598 || section->output_section->owner != output_bfd)
4601 /* Get the relocs. */
4603 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
4604 NULL, info->keep_memory);
4605 if (internal_relocs == NULL)
4606 goto error_ret_free_local;
4608 /* Now examine each relocation. */
4609 irela = internal_relocs;
4610 irelaend = irela + section->reloc_count;
4611 for (; irela < irelaend; irela++)
4613 unsigned int r_type, r_indx;
4614 enum elf32_arm_stub_type stub_type;
4615 struct elf32_arm_stub_hash_entry *stub_entry;
4618 bfd_vma destination;
4619 struct elf32_arm_link_hash_entry *hash;
4620 const char *sym_name;
4622 const asection *id_sec;
4624 bfd_boolean created_stub = FALSE;
4626 r_type = ELF32_R_TYPE (irela->r_info);
4627 r_indx = ELF32_R_SYM (irela->r_info);
4629 if (r_type >= (unsigned int) R_ARM_max)
4631 bfd_set_error (bfd_error_bad_value);
4632 error_ret_free_internal:
4633 if (elf_section_data (section)->relocs == NULL)
4634 free (internal_relocs);
4635 goto error_ret_free_local;
4639 if (r_indx >= symtab_hdr->sh_info)
4640 hash = elf32_arm_hash_entry
4641 (elf_sym_hashes (input_bfd)
4642 [r_indx - symtab_hdr->sh_info]);
4644 /* Only look for stubs on branch instructions, or
4645 non-relaxed TLSCALL */
4646 if ((r_type != (unsigned int) R_ARM_CALL)
4647 && (r_type != (unsigned int) R_ARM_THM_CALL)
4648 && (r_type != (unsigned int) R_ARM_JUMP24)
4649 && (r_type != (unsigned int) R_ARM_THM_JUMP19)
4650 && (r_type != (unsigned int) R_ARM_THM_XPC22)
4651 && (r_type != (unsigned int) R_ARM_THM_JUMP24)
4652 && (r_type != (unsigned int) R_ARM_PLT32)
4653 && !((r_type == (unsigned int) R_ARM_TLS_CALL
4654 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
4655 && r_type == elf32_arm_tls_transition
4656 (info, r_type, &hash->root)
4657 && ((hash ? hash->tls_type
4658 : (elf32_arm_local_got_tls_type
4659 (input_bfd)[r_indx]))
4660 & GOT_TLS_GDESC) != 0))
4663 /* Now determine the call target, its name, value,
4670 if (r_type == (unsigned int) R_ARM_TLS_CALL
4671 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
4673 /* A non-relaxed TLS call. The target is the
4674 plt-resident trampoline and nothing to do
4676 BFD_ASSERT (htab->tls_trampoline > 0);
4677 sym_sec = htab->root.splt;
4678 sym_value = htab->tls_trampoline;
4684 /* It's a local symbol. */
4685 Elf_Internal_Sym *sym;
4687 if (local_syms == NULL)
4690 = (Elf_Internal_Sym *) symtab_hdr->contents;
4691 if (local_syms == NULL)
4693 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4694 symtab_hdr->sh_info, 0,
4696 if (local_syms == NULL)
4697 goto error_ret_free_internal;
4700 sym = local_syms + r_indx;
4701 if (sym->st_shndx == SHN_UNDEF)
4702 sym_sec = bfd_und_section_ptr;
4703 else if (sym->st_shndx == SHN_ABS)
4704 sym_sec = bfd_abs_section_ptr;
4705 else if (sym->st_shndx == SHN_COMMON)
4706 sym_sec = bfd_com_section_ptr;
4709 bfd_section_from_elf_index (input_bfd, sym->st_shndx);
4712 /* This is an undefined symbol. It can never
4716 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4717 sym_value = sym->st_value;
4718 destination = (sym_value + irela->r_addend
4719 + sym_sec->output_offset
4720 + sym_sec->output_section->vma);
4721 st_type = ELF_ST_TYPE (sym->st_info);
4723 = bfd_elf_string_from_elf_section (input_bfd,
4724 symtab_hdr->sh_link,
4729 /* It's an external symbol. */
4730 while (hash->root.root.type == bfd_link_hash_indirect
4731 || hash->root.root.type == bfd_link_hash_warning)
4732 hash = ((struct elf32_arm_link_hash_entry *)
4733 hash->root.root.u.i.link);
4735 if (hash->root.root.type == bfd_link_hash_defined
4736 || hash->root.root.type == bfd_link_hash_defweak)
4738 sym_sec = hash->root.root.u.def.section;
4739 sym_value = hash->root.root.u.def.value;
4741 struct elf32_arm_link_hash_table *globals =
4742 elf32_arm_hash_table (info);
4744 /* For a destination in a shared library,
4745 use the PLT stub as target address to
4746 decide whether a branch stub is
4749 && globals->root.splt != NULL
4751 && hash->root.plt.offset != (bfd_vma) -1)
4753 sym_sec = globals->root.splt;
4754 sym_value = hash->root.plt.offset;
4755 if (sym_sec->output_section != NULL)
4756 destination = (sym_value
4757 + sym_sec->output_offset
4758 + sym_sec->output_section->vma);
4760 else if (sym_sec->output_section != NULL)
4761 destination = (sym_value + irela->r_addend
4762 + sym_sec->output_offset
4763 + sym_sec->output_section->vma);
4765 else if ((hash->root.root.type == bfd_link_hash_undefined)
4766 || (hash->root.root.type == bfd_link_hash_undefweak))
4768 /* For a shared library, use the PLT stub as
4769 target address to decide whether a long
4770 branch stub is needed.
4771 For absolute code, they cannot be handled. */
4772 struct elf32_arm_link_hash_table *globals =
4773 elf32_arm_hash_table (info);
4776 && globals->root.splt != NULL
4778 && hash->root.plt.offset != (bfd_vma) -1)
4780 sym_sec = globals->root.splt;
4781 sym_value = hash->root.plt.offset;
4782 if (sym_sec->output_section != NULL)
4783 destination = (sym_value
4784 + sym_sec->output_offset
4785 + sym_sec->output_section->vma);
4792 bfd_set_error (bfd_error_bad_value);
4793 goto error_ret_free_internal;
4795 st_type = ELF_ST_TYPE (hash->root.type);
4796 sym_name = hash->root.root.root.string;
4801 /* Determine what (if any) linker stub is needed. */
4802 stub_type = arm_type_of_stub (info, section, irela,
4804 destination, sym_sec,
4805 input_bfd, sym_name);
4806 if (stub_type == arm_stub_none)
4809 /* Support for grouping stub sections. */
4810 id_sec = htab->stub_group[section->id].link_sec;
4812 /* Get the name of this stub. */
4813 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash,
4816 goto error_ret_free_internal;
4818 /* We've either created a stub for this reloc already,
4819 or we are about to. */
4820 created_stub = TRUE;
4822 stub_entry = arm_stub_hash_lookup
4823 (&htab->stub_hash_table, stub_name,
4825 if (stub_entry != NULL)
4827 /* The proper stub has already been created. */
4829 stub_entry->target_value = sym_value;
4833 stub_entry = elf32_arm_add_stub (stub_name, section,
4835 if (stub_entry == NULL)
4838 goto error_ret_free_internal;
4841 stub_entry->target_value = sym_value;
4842 stub_entry->target_section = sym_sec;
4843 stub_entry->stub_type = stub_type;
4844 stub_entry->h = hash;
4845 stub_entry->st_type = st_type;
4847 if (sym_name == NULL)
4848 sym_name = "unnamed";
4849 stub_entry->output_name = (char *)
4850 bfd_alloc (htab->stub_bfd,
4851 sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
4852 + strlen (sym_name));
4853 if (stub_entry->output_name == NULL)
4856 goto error_ret_free_internal;
4859 /* For historical reasons, use the existing names for
4860 ARM-to-Thumb and Thumb-to-ARM stubs. */
4861 if ( ((r_type == (unsigned int) R_ARM_THM_CALL)
4862 || (r_type == (unsigned int) R_ARM_THM_JUMP24))
4863 && st_type != STT_ARM_TFUNC)
4864 sprintf (stub_entry->output_name,
4865 THUMB2ARM_GLUE_ENTRY_NAME, sym_name);
4866 else if ( ((r_type == (unsigned int) R_ARM_CALL)
4867 || (r_type == (unsigned int) R_ARM_JUMP24))
4868 && st_type == STT_ARM_TFUNC)
4869 sprintf (stub_entry->output_name,
4870 ARM2THUMB_GLUE_ENTRY_NAME, sym_name);
4872 sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
4875 stub_changed = TRUE;
4879 /* Look for relocations which might trigger Cortex-A8
4881 if (htab->fix_cortex_a8
4882 && (r_type == (unsigned int) R_ARM_THM_JUMP24
4883 || r_type == (unsigned int) R_ARM_THM_JUMP19
4884 || r_type == (unsigned int) R_ARM_THM_CALL
4885 || r_type == (unsigned int) R_ARM_THM_XPC22))
4887 bfd_vma from = section->output_section->vma
4888 + section->output_offset
4891 if ((from & 0xfff) == 0xffe)
4893 /* Found a candidate. Note we haven't checked the
4894 destination is within 4K here: if we do so (and
4895 don't create an entry in a8_relocs) we can't tell
4896 that a branch should have been relocated when
4898 if (num_a8_relocs == a8_reloc_table_size)
4900 a8_reloc_table_size *= 2;
4901 a8_relocs = (struct a8_erratum_reloc *)
4902 bfd_realloc (a8_relocs,
4903 sizeof (struct a8_erratum_reloc)
4904 * a8_reloc_table_size);
4907 a8_relocs[num_a8_relocs].from = from;
4908 a8_relocs[num_a8_relocs].destination = destination;
4909 a8_relocs[num_a8_relocs].r_type = r_type;
4910 a8_relocs[num_a8_relocs].st_type = st_type;
4911 a8_relocs[num_a8_relocs].sym_name = sym_name;
4912 a8_relocs[num_a8_relocs].non_a8_stub = created_stub;
4913 a8_relocs[num_a8_relocs].hash = hash;
4920 /* We're done with the internal relocs, free them. */
4921 if (elf_section_data (section)->relocs == NULL)
4922 free (internal_relocs);
4925 if (htab->fix_cortex_a8)
4927 /* Sort relocs which might apply to Cortex-A8 erratum. */
4928 qsort (a8_relocs, num_a8_relocs,
4929 sizeof (struct a8_erratum_reloc),
4932 /* Scan for branches which might trigger Cortex-A8 erratum. */
4933 if (cortex_a8_erratum_scan (input_bfd, info, &a8_fixes,
4934 &num_a8_fixes, &a8_fix_table_size,
4935 a8_relocs, num_a8_relocs,
4936 prev_num_a8_fixes, &stub_changed)
4938 goto error_ret_free_local;
4942 if (prev_num_a8_fixes != num_a8_fixes)
4943 stub_changed = TRUE;
4948 /* OK, we've added some stubs. Find out the new size of the
4950 for (stub_sec = htab->stub_bfd->sections;
4952 stub_sec = stub_sec->next)
4954 /* Ignore non-stub sections. */
4955 if (!strstr (stub_sec->name, STUB_SUFFIX))
4961 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
4963 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
4964 if (htab->fix_cortex_a8)
4965 for (i = 0; i < num_a8_fixes; i++)
4967 stub_sec = elf32_arm_create_or_find_stub_sec (NULL,
4968 a8_fixes[i].section, htab);
4970 if (stub_sec == NULL)
4971 goto error_ret_free_local;
4974 += find_stub_size_and_template (a8_fixes[i].stub_type, NULL,
4979 /* Ask the linker to do its stuff. */
4980 (*htab->layout_sections_again) ();
4983 /* Add stubs for Cortex-A8 erratum fixes now. */
4984 if (htab->fix_cortex_a8)
4986 for (i = 0; i < num_a8_fixes; i++)
4988 struct elf32_arm_stub_hash_entry *stub_entry;
4989 char *stub_name = a8_fixes[i].stub_name;
4990 asection *section = a8_fixes[i].section;
4991 unsigned int section_id = a8_fixes[i].section->id;
4992 asection *link_sec = htab->stub_group[section_id].link_sec;
4993 asection *stub_sec = htab->stub_group[section_id].stub_sec;
4994 const insn_sequence *template_sequence;
4995 int template_size, size = 0;
4997 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4999 if (stub_entry == NULL)
5001 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
5007 stub_entry->stub_sec = stub_sec;
5008 stub_entry->stub_offset = 0;
5009 stub_entry->id_sec = link_sec;
5010 stub_entry->stub_type = a8_fixes[i].stub_type;
5011 stub_entry->target_section = a8_fixes[i].section;
5012 stub_entry->target_value = a8_fixes[i].offset;
5013 stub_entry->target_addend = a8_fixes[i].addend;
5014 stub_entry->orig_insn = a8_fixes[i].orig_insn;
5015 stub_entry->st_type = a8_fixes[i].st_type;
5017 size = find_stub_size_and_template (a8_fixes[i].stub_type,
5021 stub_entry->stub_size = size;
5022 stub_entry->stub_template = template_sequence;
5023 stub_entry->stub_template_size = template_size;
5026 /* Stash the Cortex-A8 erratum fix array for use later in
5027 elf32_arm_write_section(). */
5028 htab->a8_erratum_fixes = a8_fixes;
5029 htab->num_a8_erratum_fixes = num_a8_fixes;
5033 htab->a8_erratum_fixes = NULL;
5034 htab->num_a8_erratum_fixes = 0;
5038 error_ret_free_local:
5042 /* Build all the stubs associated with the current output file. The
5043 stubs are kept in a hash table attached to the main linker hash
5044 table. We also set up the .plt entries for statically linked PIC
5045 functions here. This function is called via arm_elf_finish in the
5049 elf32_arm_build_stubs (struct bfd_link_info *info)
5052 struct bfd_hash_table *table;
5053 struct elf32_arm_link_hash_table *htab;
5055 htab = elf32_arm_hash_table (info);
5059 for (stub_sec = htab->stub_bfd->sections;
5061 stub_sec = stub_sec->next)
5065 /* Ignore non-stub sections. */
5066 if (!strstr (stub_sec->name, STUB_SUFFIX))
5069 /* Allocate memory to hold the linker stubs. */
5070 size = stub_sec->size;
5071 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
5072 if (stub_sec->contents == NULL && size != 0)
5077 /* Build the stubs as directed by the stub hash table. */
5078 table = &htab->stub_hash_table;
5079 bfd_hash_traverse (table, arm_build_one_stub, info);
5080 if (htab->fix_cortex_a8)
5082 /* Place the cortex a8 stubs last. */
5083 htab->fix_cortex_a8 = -1;
5084 bfd_hash_traverse (table, arm_build_one_stub, info);
5090 /* Locate the Thumb encoded calling stub for NAME. */
5092 static struct elf_link_hash_entry *
5093 find_thumb_glue (struct bfd_link_info *link_info,
5095 char **error_message)
5098 struct elf_link_hash_entry *hash;
5099 struct elf32_arm_link_hash_table *hash_table;
5101 /* We need a pointer to the armelf specific hash table. */
5102 hash_table = elf32_arm_hash_table (link_info);
5103 if (hash_table == NULL)
5106 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5107 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
5109 BFD_ASSERT (tmp_name);
5111 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
5113 hash = elf_link_hash_lookup
5114 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
5117 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
5118 tmp_name, name) == -1)
5119 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
5126 /* Locate the ARM encoded calling stub for NAME. */
5128 static struct elf_link_hash_entry *
5129 find_arm_glue (struct bfd_link_info *link_info,
5131 char **error_message)
5134 struct elf_link_hash_entry *myh;
5135 struct elf32_arm_link_hash_table *hash_table;
5137 /* We need a pointer to the elfarm specific hash table. */
5138 hash_table = elf32_arm_hash_table (link_info);
5139 if (hash_table == NULL)
5142 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5143 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
5145 BFD_ASSERT (tmp_name);
5147 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
5149 myh = elf_link_hash_lookup
5150 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
5153 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
5154 tmp_name, name) == -1)
5155 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
5162 /* ARM->Thumb glue (static images):
5166 ldr r12, __func_addr
5169 .word func @ behave as if you saw a ARM_32 reloc.
5176 .word func @ behave as if you saw a ARM_32 reloc.
5178 (relocatable images)
5181 ldr r12, __func_offset
5187 #define ARM2THUMB_STATIC_GLUE_SIZE 12
5188 static const insn32 a2t1_ldr_insn = 0xe59fc000;
5189 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
5190 static const insn32 a2t3_func_addr_insn = 0x00000001;
5192 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
5193 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
5194 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
5196 #define ARM2THUMB_PIC_GLUE_SIZE 16
5197 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
5198 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
5199 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
5201 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
5205 __func_from_thumb: __func_from_thumb:
5207 nop ldr r6, __func_addr
5217 #define THUMB2ARM_GLUE_SIZE 8
5218 static const insn16 t2a1_bx_pc_insn = 0x4778;
5219 static const insn16 t2a2_noop_insn = 0x46c0;
5220 static const insn32 t2a3_b_insn = 0xea000000;
5222 #define VFP11_ERRATUM_VENEER_SIZE 8
5224 #define ARM_BX_VENEER_SIZE 12
5225 static const insn32 armbx1_tst_insn = 0xe3100001;
5226 static const insn32 armbx2_moveq_insn = 0x01a0f000;
5227 static const insn32 armbx3_bx_insn = 0xe12fff10;
5229 #ifndef ELFARM_NABI_C_INCLUDED
5231 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
5234 bfd_byte * contents;
5238 /* Do not include empty glue sections in the output. */
5241 s = bfd_get_section_by_name (abfd, name);
5243 s->flags |= SEC_EXCLUDE;
5248 BFD_ASSERT (abfd != NULL);
5250 s = bfd_get_section_by_name (abfd, name);
5251 BFD_ASSERT (s != NULL);
5253 contents = (bfd_byte *) bfd_alloc (abfd, size);
5255 BFD_ASSERT (s->size == size);
5256 s->contents = contents;
5260 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
5262 struct elf32_arm_link_hash_table * globals;
5264 globals = elf32_arm_hash_table (info);
5265 BFD_ASSERT (globals != NULL);
5267 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5268 globals->arm_glue_size,
5269 ARM2THUMB_GLUE_SECTION_NAME);
5271 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5272 globals->thumb_glue_size,
5273 THUMB2ARM_GLUE_SECTION_NAME);
5275 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5276 globals->vfp11_erratum_glue_size,
5277 VFP11_ERRATUM_VENEER_SECTION_NAME);
5279 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5280 globals->bx_glue_size,
5281 ARM_BX_GLUE_SECTION_NAME);
5286 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5287 returns the symbol identifying the stub. */
5289 static struct elf_link_hash_entry *
5290 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
5291 struct elf_link_hash_entry * h)
5293 const char * name = h->root.root.string;
5296 struct elf_link_hash_entry * myh;
5297 struct bfd_link_hash_entry * bh;
5298 struct elf32_arm_link_hash_table * globals;
5302 globals = elf32_arm_hash_table (link_info);
5303 BFD_ASSERT (globals != NULL);
5304 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5306 s = bfd_get_section_by_name
5307 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
5309 BFD_ASSERT (s != NULL);
5311 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5312 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
5314 BFD_ASSERT (tmp_name);
5316 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
5318 myh = elf_link_hash_lookup
5319 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5323 /* We've already seen this guy. */
5328 /* The only trick here is using hash_table->arm_glue_size as the value.
5329 Even though the section isn't allocated yet, this is where we will be
5330 putting it. The +1 on the value marks that the stub has not been
5331 output yet - not that it is a Thumb function. */
5333 val = globals->arm_glue_size + 1;
5334 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
5335 tmp_name, BSF_GLOBAL, s, val,
5336 NULL, TRUE, FALSE, &bh);
5338 myh = (struct elf_link_hash_entry *) bh;
5339 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
5340 myh->forced_local = 1;
5344 if (link_info->shared || globals->root.is_relocatable_executable
5345 || globals->pic_veneer)
5346 size = ARM2THUMB_PIC_GLUE_SIZE;
5347 else if (globals->use_blx)
5348 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
5350 size = ARM2THUMB_STATIC_GLUE_SIZE;
5353 globals->arm_glue_size += size;
5358 /* Allocate space for ARMv4 BX veneers. */
5361 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
5364 struct elf32_arm_link_hash_table *globals;
5366 struct elf_link_hash_entry *myh;
5367 struct bfd_link_hash_entry *bh;
5370 /* BX PC does not need a veneer. */
5374 globals = elf32_arm_hash_table (link_info);
5375 BFD_ASSERT (globals != NULL);
5376 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5378 /* Check if this veneer has already been allocated. */
5379 if (globals->bx_glue_offset[reg])
5382 s = bfd_get_section_by_name
5383 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
5385 BFD_ASSERT (s != NULL);
5387 /* Add symbol for veneer. */
5389 bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
5391 BFD_ASSERT (tmp_name);
5393 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
5395 myh = elf_link_hash_lookup
5396 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
5398 BFD_ASSERT (myh == NULL);
5401 val = globals->bx_glue_size;
5402 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
5403 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
5404 NULL, TRUE, FALSE, &bh);
5406 myh = (struct elf_link_hash_entry *) bh;
5407 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
5408 myh->forced_local = 1;
5410 s->size += ARM_BX_VENEER_SIZE;
5411 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
5412 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
5416 /* Add an entry to the code/data map for section SEC. */
5419 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
5421 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
5422 unsigned int newidx;
5424 if (sec_data->map == NULL)
5426 sec_data->map = (elf32_arm_section_map *)
5427 bfd_malloc (sizeof (elf32_arm_section_map));
5428 sec_data->mapcount = 0;
5429 sec_data->mapsize = 1;
5432 newidx = sec_data->mapcount++;
5434 if (sec_data->mapcount > sec_data->mapsize)
5436 sec_data->mapsize *= 2;
5437 sec_data->map = (elf32_arm_section_map *)
5438 bfd_realloc_or_free (sec_data->map, sec_data->mapsize
5439 * sizeof (elf32_arm_section_map));
5444 sec_data->map[newidx].vma = vma;
5445 sec_data->map[newidx].type = type;
5450 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5451 veneers are handled for now. */
5454 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
5455 elf32_vfp11_erratum_list *branch,
5457 asection *branch_sec,
5458 unsigned int offset)
5461 struct elf32_arm_link_hash_table *hash_table;
5463 struct elf_link_hash_entry *myh;
5464 struct bfd_link_hash_entry *bh;
5466 struct _arm_elf_section_data *sec_data;
5467 elf32_vfp11_erratum_list *newerr;
5469 hash_table = elf32_arm_hash_table (link_info);
5470 BFD_ASSERT (hash_table != NULL);
5471 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
5473 s = bfd_get_section_by_name
5474 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
5476 sec_data = elf32_arm_section_data (s);
5478 BFD_ASSERT (s != NULL);
5480 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
5481 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
5483 BFD_ASSERT (tmp_name);
5485 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
5486 hash_table->num_vfp11_fixes);
5488 myh = elf_link_hash_lookup
5489 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
5491 BFD_ASSERT (myh == NULL);
5494 val = hash_table->vfp11_erratum_glue_size;
5495 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
5496 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
5497 NULL, TRUE, FALSE, &bh);
5499 myh = (struct elf_link_hash_entry *) bh;
5500 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
5501 myh->forced_local = 1;
5503 /* Link veneer back to calling location. */
5504 sec_data->erratumcount += 1;
5505 newerr = (elf32_vfp11_erratum_list *)
5506 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
5508 newerr->type = VFP11_ERRATUM_ARM_VENEER;
5510 newerr->u.v.branch = branch;
5511 newerr->u.v.id = hash_table->num_vfp11_fixes;
5512 branch->u.b.veneer = newerr;
5514 newerr->next = sec_data->erratumlist;
5515 sec_data->erratumlist = newerr;
5517 /* A symbol for the return from the veneer. */
5518 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
5519 hash_table->num_vfp11_fixes);
5521 myh = elf_link_hash_lookup
5522 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
5529 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
5530 branch_sec, val, NULL, TRUE, FALSE, &bh);
5532 myh = (struct elf_link_hash_entry *) bh;
5533 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
5534 myh->forced_local = 1;
5538 /* Generate a mapping symbol for the veneer section, and explicitly add an
5539 entry for that symbol to the code/data map for the section. */
5540 if (hash_table->vfp11_erratum_glue_size == 0)
5543 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5544 ever requires this erratum fix. */
5545 _bfd_generic_link_add_one_symbol (link_info,
5546 hash_table->bfd_of_glue_owner, "$a",
5547 BSF_LOCAL, s, 0, NULL,
5550 myh = (struct elf_link_hash_entry *) bh;
5551 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
5552 myh->forced_local = 1;
5554 /* The elf32_arm_init_maps function only cares about symbols from input
5555 BFDs. We must make a note of this generated mapping symbol
5556 ourselves so that code byteswapping works properly in
5557 elf32_arm_write_section. */
5558 elf32_arm_section_map_add (s, 'a', 0);
5561 s->size += VFP11_ERRATUM_VENEER_SIZE;
5562 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
5563 hash_table->num_vfp11_fixes++;
5565 /* The offset of the veneer. */
5569 #define ARM_GLUE_SECTION_FLAGS \
5570 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
5571 | SEC_READONLY | SEC_LINKER_CREATED)
5573 /* Create a fake section for use by the ARM backend of the linker. */
5576 arm_make_glue_section (bfd * abfd, const char * name)
5580 sec = bfd_get_section_by_name (abfd, name);
5585 sec = bfd_make_section_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
5588 || !bfd_set_section_alignment (abfd, sec, 2))
5591 /* Set the gc mark to prevent the section from being removed by garbage
5592 collection, despite the fact that no relocs refer to this section. */
5598 /* Add the glue sections to ABFD. This function is called from the
5599 linker scripts in ld/emultempl/{armelf}.em. */
5602 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
5603 struct bfd_link_info *info)
5605 /* If we are only performing a partial
5606 link do not bother adding the glue. */
5607 if (info->relocatable)
5610 return arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
5611 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
5612 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
5613 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
5616 /* Select a BFD to be used to hold the sections used by the glue code.
5617 This function is called from the linker scripts in ld/emultempl/
5621 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
5623 struct elf32_arm_link_hash_table *globals;
5625 /* If we are only performing a partial link
5626 do not bother getting a bfd to hold the glue. */
5627 if (info->relocatable)
5630 /* Make sure we don't attach the glue sections to a dynamic object. */
5631 BFD_ASSERT (!(abfd->flags & DYNAMIC));
5633 globals = elf32_arm_hash_table (info);
5634 BFD_ASSERT (globals != NULL);
5636 if (globals->bfd_of_glue_owner != NULL)
5639 /* Save the bfd for later use. */
5640 globals->bfd_of_glue_owner = abfd;
5646 check_use_blx (struct elf32_arm_link_hash_table *globals)
5648 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
5650 globals->use_blx = 1;
5654 bfd_elf32_arm_process_before_allocation (bfd *abfd,
5655 struct bfd_link_info *link_info)
5657 Elf_Internal_Shdr *symtab_hdr;
5658 Elf_Internal_Rela *internal_relocs = NULL;
5659 Elf_Internal_Rela *irel, *irelend;
5660 bfd_byte *contents = NULL;
5663 struct elf32_arm_link_hash_table *globals;
5665 /* If we are only performing a partial link do not bother
5666 to construct any glue. */
5667 if (link_info->relocatable)
5670 /* Here we have a bfd that is to be included on the link. We have a
5671 hook to do reloc rummaging, before section sizes are nailed down. */
5672 globals = elf32_arm_hash_table (link_info);
5673 BFD_ASSERT (globals != NULL);
5675 check_use_blx (globals);
5677 if (globals->byteswap_code && !bfd_big_endian (abfd))
5679 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
5684 /* PR 5398: If we have not decided to include any loadable sections in
5685 the output then we will not have a glue owner bfd. This is OK, it
5686 just means that there is nothing else for us to do here. */
5687 if (globals->bfd_of_glue_owner == NULL)
5690 /* Rummage around all the relocs and map the glue vectors. */
5691 sec = abfd->sections;
5696 for (; sec != NULL; sec = sec->next)
5698 if (sec->reloc_count == 0)
5701 if ((sec->flags & SEC_EXCLUDE) != 0)
5704 symtab_hdr = & elf_symtab_hdr (abfd);
5706 /* Load the relocs. */
5708 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
5710 if (internal_relocs == NULL)
5713 irelend = internal_relocs + sec->reloc_count;
5714 for (irel = internal_relocs; irel < irelend; irel++)
5717 unsigned long r_index;
5719 struct elf_link_hash_entry *h;
5721 r_type = ELF32_R_TYPE (irel->r_info);
5722 r_index = ELF32_R_SYM (irel->r_info);
5724 /* These are the only relocation types we care about. */
5725 if ( r_type != R_ARM_PC24
5726 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
5729 /* Get the section contents if we haven't done so already. */
5730 if (contents == NULL)
5732 /* Get cached copy if it exists. */
5733 if (elf_section_data (sec)->this_hdr.contents != NULL)
5734 contents = elf_section_data (sec)->this_hdr.contents;
5737 /* Go get them off disk. */
5738 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
5743 if (r_type == R_ARM_V4BX)
5747 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
5748 record_arm_bx_glue (link_info, reg);
5752 /* If the relocation is not against a symbol it cannot concern us. */
5755 /* We don't care about local symbols. */
5756 if (r_index < symtab_hdr->sh_info)
5759 /* This is an external symbol. */
5760 r_index -= symtab_hdr->sh_info;
5761 h = (struct elf_link_hash_entry *)
5762 elf_sym_hashes (abfd)[r_index];
5764 /* If the relocation is against a static symbol it must be within
5765 the current section and so cannot be a cross ARM/Thumb relocation. */
5769 /* If the call will go through a PLT entry then we do not need
5771 if (globals->root.splt != NULL && h->plt.offset != (bfd_vma) -1)
5777 /* This one is a call from arm code. We need to look up
5778 the target of the call. If it is a thumb target, we
5780 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
5781 record_arm_to_thumb_glue (link_info, h);
5789 if (contents != NULL
5790 && elf_section_data (sec)->this_hdr.contents != contents)
5794 if (internal_relocs != NULL
5795 && elf_section_data (sec)->relocs != internal_relocs)
5796 free (internal_relocs);
5797 internal_relocs = NULL;
5803 if (contents != NULL
5804 && elf_section_data (sec)->this_hdr.contents != contents)
5806 if (internal_relocs != NULL
5807 && elf_section_data (sec)->relocs != internal_relocs)
5808 free (internal_relocs);
5815 /* Initialise maps of ARM/Thumb/data for input BFDs. */
5818 bfd_elf32_arm_init_maps (bfd *abfd)
5820 Elf_Internal_Sym *isymbuf;
5821 Elf_Internal_Shdr *hdr;
5822 unsigned int i, localsyms;
5824 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
5825 if (! is_arm_elf (abfd))
5828 if ((abfd->flags & DYNAMIC) != 0)
5831 hdr = & elf_symtab_hdr (abfd);
5832 localsyms = hdr->sh_info;
5834 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
5835 should contain the number of local symbols, which should come before any
5836 global symbols. Mapping symbols are always local. */
5837 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
5840 /* No internal symbols read? Skip this BFD. */
5841 if (isymbuf == NULL)
5844 for (i = 0; i < localsyms; i++)
5846 Elf_Internal_Sym *isym = &isymbuf[i];
5847 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5851 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
5853 name = bfd_elf_string_from_elf_section (abfd,
5854 hdr->sh_link, isym->st_name);
5856 if (bfd_is_arm_special_symbol_name (name,
5857 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
5858 elf32_arm_section_map_add (sec, name[1], isym->st_value);
5864 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
5865 say what they wanted. */
5868 bfd_elf32_arm_set_cortex_a8_fix (bfd *obfd, struct bfd_link_info *link_info)
5870 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
5871 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
5873 if (globals == NULL)
5876 if (globals->fix_cortex_a8 == -1)
5878 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
5879 if (out_attr[Tag_CPU_arch].i == TAG_CPU_ARCH_V7
5880 && (out_attr[Tag_CPU_arch_profile].i == 'A'
5881 || out_attr[Tag_CPU_arch_profile].i == 0))
5882 globals->fix_cortex_a8 = 1;
5884 globals->fix_cortex_a8 = 0;
5890 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
5892 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
5893 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
5895 if (globals == NULL)
5897 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
5898 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
5900 switch (globals->vfp11_fix)
5902 case BFD_ARM_VFP11_FIX_DEFAULT:
5903 case BFD_ARM_VFP11_FIX_NONE:
5904 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
5908 /* Give a warning, but do as the user requests anyway. */
5909 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
5910 "workaround is not necessary for target architecture"), obfd);
5913 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
5914 /* For earlier architectures, we might need the workaround, but do not
5915 enable it by default. If users is running with broken hardware, they
5916 must enable the erratum fix explicitly. */
5917 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
5921 enum bfd_arm_vfp11_pipe
5929 /* Return a VFP register number. This is encoded as RX:X for single-precision
5930 registers, or X:RX for double-precision registers, where RX is the group of
5931 four bits in the instruction encoding and X is the single extension bit.
5932 RX and X fields are specified using their lowest (starting) bit. The return
5935 0...31: single-precision registers s0...s31
5936 32...63: double-precision registers d0...d31.
5938 Although X should be zero for VFP11 (encoding d0...d15 only), we might
5939 encounter VFP3 instructions, so we allow the full range for DP registers. */
5942 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
5946 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
5948 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
5951 /* Set bits in *WMASK according to a register number REG as encoded by
5952 bfd_arm_vfp11_regno(). Ignore d16-d31. */
5955 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
5960 *wmask |= 3 << ((reg - 32) * 2);
5963 /* Return TRUE if WMASK overwrites anything in REGS. */
5966 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
5970 for (i = 0; i < numregs; i++)
5972 unsigned int reg = regs[i];
5974 if (reg < 32 && (wmask & (1 << reg)) != 0)
5982 if ((wmask & (3 << (reg * 2))) != 0)
5989 /* In this function, we're interested in two things: finding input registers
5990 for VFP data-processing instructions, and finding the set of registers which
5991 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
5992 hold the written set, so FLDM etc. are easy to deal with (we're only
5993 interested in 32 SP registers or 16 dp registers, due to the VFP version
5994 implemented by the chip in question). DP registers are marked by setting
5995 both SP registers in the write mask). */
5997 static enum bfd_arm_vfp11_pipe
5998 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
6001 enum bfd_arm_vfp11_pipe vpipe = VFP11_BAD;
6002 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
6004 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
6007 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
6008 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
6010 pqrs = ((insn & 0x00800000) >> 20)
6011 | ((insn & 0x00300000) >> 19)
6012 | ((insn & 0x00000040) >> 6);
6016 case 0: /* fmac[sd]. */
6017 case 1: /* fnmac[sd]. */
6018 case 2: /* fmsc[sd]. */
6019 case 3: /* fnmsc[sd]. */
6021 bfd_arm_vfp11_write_mask (destmask, fd);
6023 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
6028 case 4: /* fmul[sd]. */
6029 case 5: /* fnmul[sd]. */
6030 case 6: /* fadd[sd]. */
6031 case 7: /* fsub[sd]. */
6035 case 8: /* fdiv[sd]. */
6038 bfd_arm_vfp11_write_mask (destmask, fd);
6039 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
6044 case 15: /* extended opcode. */
6046 unsigned int extn = ((insn >> 15) & 0x1e)
6047 | ((insn >> 7) & 1);
6051 case 0: /* fcpy[sd]. */
6052 case 1: /* fabs[sd]. */
6053 case 2: /* fneg[sd]. */
6054 case 8: /* fcmp[sd]. */
6055 case 9: /* fcmpe[sd]. */
6056 case 10: /* fcmpz[sd]. */
6057 case 11: /* fcmpez[sd]. */
6058 case 16: /* fuito[sd]. */
6059 case 17: /* fsito[sd]. */
6060 case 24: /* ftoui[sd]. */
6061 case 25: /* ftouiz[sd]. */
6062 case 26: /* ftosi[sd]. */
6063 case 27: /* ftosiz[sd]. */
6064 /* These instructions will not bounce due to underflow. */
6069 case 3: /* fsqrt[sd]. */
6070 /* fsqrt cannot underflow, but it can (perhaps) overwrite
6071 registers to cause the erratum in previous instructions. */
6072 bfd_arm_vfp11_write_mask (destmask, fd);
6076 case 15: /* fcvt{ds,sd}. */
6080 bfd_arm_vfp11_write_mask (destmask, fd);
6082 /* Only FCVTSD can underflow. */
6083 if ((insn & 0x100) != 0)
6102 /* Two-register transfer. */
6103 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
6105 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
6107 if ((insn & 0x100000) == 0)
6110 bfd_arm_vfp11_write_mask (destmask, fm);
6113 bfd_arm_vfp11_write_mask (destmask, fm);
6114 bfd_arm_vfp11_write_mask (destmask, fm + 1);
6120 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
6122 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
6123 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
6127 case 0: /* Two-reg transfer. We should catch these above. */
6130 case 2: /* fldm[sdx]. */
6134 unsigned int i, offset = insn & 0xff;
6139 for (i = fd; i < fd + offset; i++)
6140 bfd_arm_vfp11_write_mask (destmask, i);
6144 case 4: /* fld[sd]. */
6146 bfd_arm_vfp11_write_mask (destmask, fd);
6155 /* Single-register transfer. Note L==0. */
6156 else if ((insn & 0x0f100e10) == 0x0e000a10)
6158 unsigned int opcode = (insn >> 21) & 7;
6159 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
6163 case 0: /* fmsr/fmdlr. */
6164 case 1: /* fmdhr. */
6165 /* Mark fmdhr and fmdlr as writing to the whole of the DP
6166 destination register. I don't know if this is exactly right,
6167 but it is the conservative choice. */
6168 bfd_arm_vfp11_write_mask (destmask, fn);
6182 static int elf32_arm_compare_mapping (const void * a, const void * b);
6185 /* Look for potentially-troublesome code sequences which might trigger the
6186 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
6187 (available from ARM) for details of the erratum. A short version is
6188 described in ld.texinfo. */
6191 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
6194 bfd_byte *contents = NULL;
6196 int regs[3], numregs = 0;
6197 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6198 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
6200 if (globals == NULL)
6203 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
6204 The states transition as follows:
6206 0 -> 1 (vector) or 0 -> 2 (scalar)
6207 A VFP FMAC-pipeline instruction has been seen. Fill
6208 regs[0]..regs[numregs-1] with its input operands. Remember this
6209 instruction in 'first_fmac'.
6212 Any instruction, except for a VFP instruction which overwrites
6217 A VFP instruction has been seen which overwrites any of regs[*].
6218 We must make a veneer! Reset state to 0 before examining next
6222 If we fail to match anything in state 2, reset to state 0 and reset
6223 the instruction pointer to the instruction after 'first_fmac'.
6225 If the VFP11 vector mode is in use, there must be at least two unrelated
6226 instructions between anti-dependent VFP11 instructions to properly avoid
6227 triggering the erratum, hence the use of the extra state 1. */
6229 /* If we are only performing a partial link do not bother
6230 to construct any glue. */
6231 if (link_info->relocatable)
6234 /* Skip if this bfd does not correspond to an ELF image. */
6235 if (! is_arm_elf (abfd))
6238 /* We should have chosen a fix type by the time we get here. */
6239 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
6241 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
6244 /* Skip this BFD if it corresponds to an executable or dynamic object. */
6245 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
6248 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6250 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
6251 struct _arm_elf_section_data *sec_data;
6253 /* If we don't have executable progbits, we're not interested in this
6254 section. Also skip if section is to be excluded. */
6255 if (elf_section_type (sec) != SHT_PROGBITS
6256 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
6257 || (sec->flags & SEC_EXCLUDE) != 0
6258 || sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6259 || sec->output_section == bfd_abs_section_ptr
6260 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
6263 sec_data = elf32_arm_section_data (sec);
6265 if (sec_data->mapcount == 0)
6268 if (elf_section_data (sec)->this_hdr.contents != NULL)
6269 contents = elf_section_data (sec)->this_hdr.contents;
6270 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
6273 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
6274 elf32_arm_compare_mapping);
6276 for (span = 0; span < sec_data->mapcount; span++)
6278 unsigned int span_start = sec_data->map[span].vma;
6279 unsigned int span_end = (span == sec_data->mapcount - 1)
6280 ? sec->size : sec_data->map[span + 1].vma;
6281 char span_type = sec_data->map[span].type;
6283 /* FIXME: Only ARM mode is supported at present. We may need to
6284 support Thumb-2 mode also at some point. */
6285 if (span_type != 'a')
6288 for (i = span_start; i < span_end;)
6290 unsigned int next_i = i + 4;
6291 unsigned int insn = bfd_big_endian (abfd)
6292 ? (contents[i] << 24)
6293 | (contents[i + 1] << 16)
6294 | (contents[i + 2] << 8)
6296 : (contents[i + 3] << 24)
6297 | (contents[i + 2] << 16)
6298 | (contents[i + 1] << 8)
6300 unsigned int writemask = 0;
6301 enum bfd_arm_vfp11_pipe vpipe;
6306 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
6308 /* I'm assuming the VFP11 erratum can trigger with denorm
6309 operands on either the FMAC or the DS pipeline. This might
6310 lead to slightly overenthusiastic veneer insertion. */
6311 if (vpipe == VFP11_FMAC || vpipe == VFP11_DS)
6313 state = use_vector ? 1 : 2;
6315 veneer_of_insn = insn;
6321 int other_regs[3], other_numregs;
6322 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
6325 if (vpipe != VFP11_BAD
6326 && bfd_arm_vfp11_antidependency (writemask, regs,
6336 int other_regs[3], other_numregs;
6337 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
6340 if (vpipe != VFP11_BAD
6341 && bfd_arm_vfp11_antidependency (writemask, regs,
6347 next_i = first_fmac + 4;
6353 abort (); /* Should be unreachable. */
6358 elf32_vfp11_erratum_list *newerr =(elf32_vfp11_erratum_list *)
6359 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
6361 elf32_arm_section_data (sec)->erratumcount += 1;
6363 newerr->u.b.vfp_insn = veneer_of_insn;
6368 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
6375 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
6380 newerr->next = sec_data->erratumlist;
6381 sec_data->erratumlist = newerr;
6390 if (contents != NULL
6391 && elf_section_data (sec)->this_hdr.contents != contents)
6399 if (contents != NULL
6400 && elf_section_data (sec)->this_hdr.contents != contents)
6406 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
6407 after sections have been laid out, using specially-named symbols. */
6410 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
6411 struct bfd_link_info *link_info)
6414 struct elf32_arm_link_hash_table *globals;
6417 if (link_info->relocatable)
6420 /* Skip if this bfd does not correspond to an ELF image. */
6421 if (! is_arm_elf (abfd))
6424 globals = elf32_arm_hash_table (link_info);
6425 if (globals == NULL)
6428 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
6429 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
6431 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6433 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
6434 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
6436 for (; errnode != NULL; errnode = errnode->next)
6438 struct elf_link_hash_entry *myh;
6441 switch (errnode->type)
6443 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
6444 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
6445 /* Find veneer symbol. */
6446 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
6447 errnode->u.b.veneer->u.v.id);
6449 myh = elf_link_hash_lookup
6450 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
6453 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
6454 "`%s'"), abfd, tmp_name);
6456 vma = myh->root.u.def.section->output_section->vma
6457 + myh->root.u.def.section->output_offset
6458 + myh->root.u.def.value;
6460 errnode->u.b.veneer->vma = vma;
6463 case VFP11_ERRATUM_ARM_VENEER:
6464 case VFP11_ERRATUM_THUMB_VENEER:
6465 /* Find return location. */
6466 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
6469 myh = elf_link_hash_lookup
6470 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
6473 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
6474 "`%s'"), abfd, tmp_name);
6476 vma = myh->root.u.def.section->output_section->vma
6477 + myh->root.u.def.section->output_offset
6478 + myh->root.u.def.value;
6480 errnode->u.v.branch->vma = vma;
6493 /* Set target relocation values needed during linking. */
6496 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
6497 struct bfd_link_info *link_info,
6499 char * target2_type,
6502 bfd_arm_vfp11_fix vfp11_fix,
6503 int no_enum_warn, int no_wchar_warn,
6504 int pic_veneer, int fix_cortex_a8)
6506 struct elf32_arm_link_hash_table *globals;
6508 globals = elf32_arm_hash_table (link_info);
6509 if (globals == NULL)
6512 globals->target1_is_rel = target1_is_rel;
6513 if (strcmp (target2_type, "rel") == 0)
6514 globals->target2_reloc = R_ARM_REL32;
6515 else if (strcmp (target2_type, "abs") == 0)
6516 globals->target2_reloc = R_ARM_ABS32;
6517 else if (strcmp (target2_type, "got-rel") == 0)
6518 globals->target2_reloc = R_ARM_GOT_PREL;
6521 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6524 globals->fix_v4bx = fix_v4bx;
6525 globals->use_blx |= use_blx;
6526 globals->vfp11_fix = vfp11_fix;
6527 globals->pic_veneer = pic_veneer;
6528 globals->fix_cortex_a8 = fix_cortex_a8;
6530 BFD_ASSERT (is_arm_elf (output_bfd));
6531 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
6532 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
6535 /* Replace the target offset of a Thumb bl or b.w instruction. */
6538 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
6544 BFD_ASSERT ((offset & 1) == 0);
6546 upper = bfd_get_16 (abfd, insn);
6547 lower = bfd_get_16 (abfd, insn + 2);
6548 reloc_sign = (offset < 0) ? 1 : 0;
6549 upper = (upper & ~(bfd_vma) 0x7ff)
6550 | ((offset >> 12) & 0x3ff)
6551 | (reloc_sign << 10);
6552 lower = (lower & ~(bfd_vma) 0x2fff)
6553 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
6554 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
6555 | ((offset >> 1) & 0x7ff);
6556 bfd_put_16 (abfd, upper, insn);
6557 bfd_put_16 (abfd, lower, insn + 2);
6560 /* Thumb code calling an ARM function. */
6563 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
6567 asection * input_section,
6568 bfd_byte * hit_data,
6571 bfd_signed_vma addend,
6573 char **error_message)
6577 long int ret_offset;
6578 struct elf_link_hash_entry * myh;
6579 struct elf32_arm_link_hash_table * globals;
6581 myh = find_thumb_glue (info, name, error_message);
6585 globals = elf32_arm_hash_table (info);
6586 BFD_ASSERT (globals != NULL);
6587 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6589 my_offset = myh->root.u.def.value;
6591 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
6592 THUMB2ARM_GLUE_SECTION_NAME);
6594 BFD_ASSERT (s != NULL);
6595 BFD_ASSERT (s->contents != NULL);
6596 BFD_ASSERT (s->output_section != NULL);
6598 if ((my_offset & 0x01) == 0x01)
6601 && sym_sec->owner != NULL
6602 && !INTERWORK_FLAG (sym_sec->owner))
6604 (*_bfd_error_handler)
6605 (_("%B(%s): warning: interworking not enabled.\n"
6606 " first occurrence: %B: thumb call to arm"),
6607 sym_sec->owner, input_bfd, name);
6613 myh->root.u.def.value = my_offset;
6615 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
6616 s->contents + my_offset);
6618 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
6619 s->contents + my_offset + 2);
6622 /* Address of destination of the stub. */
6623 ((bfd_signed_vma) val)
6625 /* Offset from the start of the current section
6626 to the start of the stubs. */
6628 /* Offset of the start of this stub from the start of the stubs. */
6630 /* Address of the start of the current section. */
6631 + s->output_section->vma)
6632 /* The branch instruction is 4 bytes into the stub. */
6634 /* ARM branches work from the pc of the instruction + 8. */
6637 put_arm_insn (globals, output_bfd,
6638 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
6639 s->contents + my_offset + 4);
6642 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
6644 /* Now go back and fix up the original BL insn to point to here. */
6646 /* Address of where the stub is located. */
6647 (s->output_section->vma + s->output_offset + my_offset)
6648 /* Address of where the BL is located. */
6649 - (input_section->output_section->vma + input_section->output_offset
6651 /* Addend in the relocation. */
6653 /* Biassing for PC-relative addressing. */
6656 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
6661 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
6663 static struct elf_link_hash_entry *
6664 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
6671 char ** error_message)
6674 long int ret_offset;
6675 struct elf_link_hash_entry * myh;
6676 struct elf32_arm_link_hash_table * globals;
6678 myh = find_arm_glue (info, name, error_message);
6682 globals = elf32_arm_hash_table (info);
6683 BFD_ASSERT (globals != NULL);
6684 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6686 my_offset = myh->root.u.def.value;
6688 if ((my_offset & 0x01) == 0x01)
6691 && sym_sec->owner != NULL
6692 && !INTERWORK_FLAG (sym_sec->owner))
6694 (*_bfd_error_handler)
6695 (_("%B(%s): warning: interworking not enabled.\n"
6696 " first occurrence: %B: arm call to thumb"),
6697 sym_sec->owner, input_bfd, name);
6701 myh->root.u.def.value = my_offset;
6703 if (info->shared || globals->root.is_relocatable_executable
6704 || globals->pic_veneer)
6706 /* For relocatable objects we can't use absolute addresses,
6707 so construct the address from a relative offset. */
6708 /* TODO: If the offset is small it's probably worth
6709 constructing the address with adds. */
6710 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
6711 s->contents + my_offset);
6712 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
6713 s->contents + my_offset + 4);
6714 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
6715 s->contents + my_offset + 8);
6716 /* Adjust the offset by 4 for the position of the add,
6717 and 8 for the pipeline offset. */
6718 ret_offset = (val - (s->output_offset
6719 + s->output_section->vma
6722 bfd_put_32 (output_bfd, ret_offset,
6723 s->contents + my_offset + 12);
6725 else if (globals->use_blx)
6727 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
6728 s->contents + my_offset);
6730 /* It's a thumb address. Add the low order bit. */
6731 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
6732 s->contents + my_offset + 4);
6736 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
6737 s->contents + my_offset);
6739 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
6740 s->contents + my_offset + 4);
6742 /* It's a thumb address. Add the low order bit. */
6743 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
6744 s->contents + my_offset + 8);
6750 BFD_ASSERT (my_offset <= globals->arm_glue_size);
6755 /* Arm code calling a Thumb function. */
6758 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
6762 asection * input_section,
6763 bfd_byte * hit_data,
6766 bfd_signed_vma addend,
6768 char **error_message)
6770 unsigned long int tmp;
6773 long int ret_offset;
6774 struct elf_link_hash_entry * myh;
6775 struct elf32_arm_link_hash_table * globals;
6777 globals = elf32_arm_hash_table (info);
6778 BFD_ASSERT (globals != NULL);
6779 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6781 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
6782 ARM2THUMB_GLUE_SECTION_NAME);
6783 BFD_ASSERT (s != NULL);
6784 BFD_ASSERT (s->contents != NULL);
6785 BFD_ASSERT (s->output_section != NULL);
6787 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
6788 sym_sec, val, s, error_message);
6792 my_offset = myh->root.u.def.value;
6793 tmp = bfd_get_32 (input_bfd, hit_data);
6794 tmp = tmp & 0xFF000000;
6796 /* Somehow these are both 4 too far, so subtract 8. */
6797 ret_offset = (s->output_offset
6799 + s->output_section->vma
6800 - (input_section->output_offset
6801 + input_section->output_section->vma
6805 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
6807 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
6812 /* Populate Arm stub for an exported Thumb function. */
6815 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
6817 struct bfd_link_info * info = (struct bfd_link_info *) inf;
6819 struct elf_link_hash_entry * myh;
6820 struct elf32_arm_link_hash_entry *eh;
6821 struct elf32_arm_link_hash_table * globals;
6824 char *error_message;
6826 eh = elf32_arm_hash_entry (h);
6827 /* Allocate stubs for exported Thumb functions on v4t. */
6828 if (eh->export_glue == NULL)
6831 globals = elf32_arm_hash_table (info);
6832 BFD_ASSERT (globals != NULL);
6833 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6835 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
6836 ARM2THUMB_GLUE_SECTION_NAME);
6837 BFD_ASSERT (s != NULL);
6838 BFD_ASSERT (s->contents != NULL);
6839 BFD_ASSERT (s->output_section != NULL);
6841 sec = eh->export_glue->root.u.def.section;
6843 BFD_ASSERT (sec->output_section != NULL);
6845 val = eh->export_glue->root.u.def.value + sec->output_offset
6846 + sec->output_section->vma;
6848 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
6849 h->root.u.def.section->owner,
6850 globals->obfd, sec, val, s,
6856 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
6859 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
6864 struct elf32_arm_link_hash_table *globals;
6866 globals = elf32_arm_hash_table (info);
6867 BFD_ASSERT (globals != NULL);
6868 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6870 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
6871 ARM_BX_GLUE_SECTION_NAME);
6872 BFD_ASSERT (s != NULL);
6873 BFD_ASSERT (s->contents != NULL);
6874 BFD_ASSERT (s->output_section != NULL);
6876 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
6878 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
6880 if ((globals->bx_glue_offset[reg] & 1) == 0)
6882 p = s->contents + glue_addr;
6883 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
6884 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
6885 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
6886 globals->bx_glue_offset[reg] |= 1;
6889 return glue_addr + s->output_section->vma + s->output_offset;
6892 /* Generate Arm stubs for exported Thumb symbols. */
6894 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
6895 struct bfd_link_info *link_info)
6897 struct elf32_arm_link_hash_table * globals;
6899 if (link_info == NULL)
6900 /* Ignore this if we are not called by the ELF backend linker. */
6903 globals = elf32_arm_hash_table (link_info);
6904 if (globals == NULL)
6907 /* If blx is available then exported Thumb symbols are OK and there is
6909 if (globals->use_blx)
6912 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
6916 /* Reserve space for COUNT dynamic relocations in relocation selection
6920 elf32_arm_allocate_dynrelocs (struct bfd_link_info *info, asection *sreloc,
6921 bfd_size_type count)
6923 struct elf32_arm_link_hash_table *htab;
6925 htab = elf32_arm_hash_table (info);
6926 BFD_ASSERT (htab->root.dynamic_sections_created);
6929 sreloc->size += RELOC_SIZE (htab) * count;
6932 /* Add relocation REL to the end of relocation section SRELOC. */
6935 elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info,
6936 asection *sreloc, Elf_Internal_Rela *rel)
6939 struct elf32_arm_link_hash_table *htab;
6941 htab = elf32_arm_hash_table (info);
6944 loc = sreloc->contents;
6945 loc += sreloc->reloc_count++ * RELOC_SIZE (htab);
6946 if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
6948 SWAP_RELOC_OUT (htab) (output_bfd, rel, loc);
6951 /* Some relocations map to different relocations depending on the
6952 target. Return the real relocation. */
6955 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
6961 if (globals->target1_is_rel)
6967 return globals->target2_reloc;
6974 /* Return the base VMA address which should be subtracted from real addresses
6975 when resolving @dtpoff relocation.
6976 This is PT_TLS segment p_vaddr. */
6979 dtpoff_base (struct bfd_link_info *info)
6981 /* If tls_sec is NULL, we should have signalled an error already. */
6982 if (elf_hash_table (info)->tls_sec == NULL)
6984 return elf_hash_table (info)->tls_sec->vma;
6987 /* Return the relocation value for @tpoff relocation
6988 if STT_TLS virtual address is ADDRESS. */
6991 tpoff (struct bfd_link_info *info, bfd_vma address)
6993 struct elf_link_hash_table *htab = elf_hash_table (info);
6996 /* If tls_sec is NULL, we should have signalled an error already. */
6997 if (htab->tls_sec == NULL)
6999 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
7000 return address - htab->tls_sec->vma + base;
7003 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
7004 VALUE is the relocation value. */
7006 static bfd_reloc_status_type
7007 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
7010 return bfd_reloc_overflow;
7012 value |= bfd_get_32 (abfd, data) & 0xfffff000;
7013 bfd_put_32 (abfd, value, data);
7014 return bfd_reloc_ok;
7017 /* Handle TLS relaxations. Relaxing is possible for symbols that use
7018 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
7019 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
7021 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
7022 is to then call final_link_relocate. Return other values in the
7025 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
7026 the pre-relaxed code. It would be nice if the relocs were updated
7027 to match the optimization. */
7029 static bfd_reloc_status_type
7030 elf32_arm_tls_relax (struct elf32_arm_link_hash_table *globals,
7031 bfd *input_bfd, asection *input_sec, bfd_byte *contents,
7032 Elf_Internal_Rela *rel, unsigned long is_local)
7036 switch (ELF32_R_TYPE (rel->r_info))
7039 return bfd_reloc_notsupported;
7041 case R_ARM_TLS_GOTDESC:
7046 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7048 insn -= 5; /* THUMB */
7050 insn -= 8; /* ARM */
7052 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7053 return bfd_reloc_continue;
7055 case R_ARM_THM_TLS_DESCSEQ:
7057 insn = bfd_get_16 (input_bfd, contents + rel->r_offset);
7058 if ((insn & 0xff78) == 0x4478) /* add rx, pc */
7062 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
7064 else if ((insn & 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
7068 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
7071 bfd_put_16 (input_bfd, insn & 0xf83f, contents + rel->r_offset);
7073 else if ((insn & 0xff87) == 0x4780) /* blx rx */
7077 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
7080 bfd_put_16 (input_bfd, 0x4600 | (insn & 0x78),
7081 contents + rel->r_offset);
7085 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
7086 /* It's a 32 bit instruction, fetch the rest of it for
7087 error generation. */
7089 | bfd_get_16 (input_bfd, contents + rel->r_offset + 2);
7090 (*_bfd_error_handler)
7091 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
7092 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
7093 return bfd_reloc_notsupported;
7097 case R_ARM_TLS_DESCSEQ:
7099 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7100 if ((insn & 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
7104 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xffff),
7105 contents + rel->r_offset);
7107 else if ((insn & 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
7111 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
7114 bfd_put_32 (input_bfd, insn & 0xfffff000,
7115 contents + rel->r_offset);
7117 else if ((insn & 0xfffffff0) == 0xe12fff30) /* blx rx */
7121 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
7124 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xf),
7125 contents + rel->r_offset);
7129 (*_bfd_error_handler)
7130 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
7131 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
7132 return bfd_reloc_notsupported;
7136 case R_ARM_TLS_CALL:
7137 /* GD->IE relaxation, turn the instruction into 'nop' or
7138 'ldr r0, [pc,r0]' */
7139 insn = is_local ? 0xe1a00000 : 0xe79f0000;
7140 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7143 case R_ARM_THM_TLS_CALL:
7144 /* GD->IE relaxation */
7146 /* add r0,pc; ldr r0, [r0] */
7148 else if (arch_has_thumb2_nop (globals))
7155 bfd_put_16 (input_bfd, insn >> 16, contents + rel->r_offset);
7156 bfd_put_16 (input_bfd, insn & 0xffff, contents + rel->r_offset + 2);
7159 return bfd_reloc_ok;
7162 /* For a given value of n, calculate the value of G_n as required to
7163 deal with group relocations. We return it in the form of an
7164 encoded constant-and-rotation, together with the final residual. If n is
7165 specified as less than zero, then final_residual is filled with the
7166 input value and no further action is performed. */
7169 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
7173 bfd_vma encoded_g_n = 0;
7174 bfd_vma residual = value; /* Also known as Y_n. */
7176 for (current_n = 0; current_n <= n; current_n++)
7180 /* Calculate which part of the value to mask. */
7187 /* Determine the most significant bit in the residual and
7188 align the resulting value to a 2-bit boundary. */
7189 for (msb = 30; msb >= 0; msb -= 2)
7190 if (residual & (3 << msb))
7193 /* The desired shift is now (msb - 6), or zero, whichever
7200 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
7201 g_n = residual & (0xff << shift);
7202 encoded_g_n = (g_n >> shift)
7203 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
7205 /* Calculate the residual for the next time around. */
7209 *final_residual = residual;
7214 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
7215 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
7218 identify_add_or_sub (bfd_vma insn)
7220 int opcode = insn & 0x1e00000;
7222 if (opcode == 1 << 23) /* ADD */
7225 if (opcode == 1 << 22) /* SUB */
7231 /* Perform a relocation as part of a final link. */
7233 static bfd_reloc_status_type
7234 elf32_arm_final_link_relocate (reloc_howto_type * howto,
7237 asection * input_section,
7238 bfd_byte * contents,
7239 Elf_Internal_Rela * rel,
7241 struct bfd_link_info * info,
7243 const char * sym_name,
7245 struct elf_link_hash_entry * h,
7246 bfd_boolean * unresolved_reloc_p,
7247 char ** error_message)
7249 unsigned long r_type = howto->type;
7250 unsigned long r_symndx;
7251 bfd_byte * hit_data = contents + rel->r_offset;
7252 bfd_vma * local_got_offsets;
7253 bfd_vma * local_tlsdesc_gotents;
7254 asection * sgot = NULL;
7255 asection * splt = NULL;
7256 asection * sreloc = NULL;
7259 bfd_signed_vma signed_addend;
7260 struct elf32_arm_link_hash_table * globals;
7262 globals = elf32_arm_hash_table (info);
7263 if (globals == NULL)
7264 return bfd_reloc_notsupported;
7266 BFD_ASSERT (is_arm_elf (input_bfd));
7268 /* Some relocation types map to different relocations depending on the
7269 target. We pick the right one here. */
7270 r_type = arm_real_reloc_type (globals, r_type);
7272 /* It is possible to have linker relaxations on some TLS access
7273 models. Update our information here. */
7274 r_type = elf32_arm_tls_transition (info, r_type, h);
7276 if (r_type != howto->type)
7277 howto = elf32_arm_howto_from_type (r_type);
7279 /* If the start address has been set, then set the EF_ARM_HASENTRY
7280 flag. Setting this more than once is redundant, but the cost is
7281 not too high, and it keeps the code simple.
7283 The test is done here, rather than somewhere else, because the
7284 start address is only set just before the final link commences.
7286 Note - if the user deliberately sets a start address of 0, the
7287 flag will not be set. */
7288 if (bfd_get_start_address (output_bfd) != 0)
7289 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
7291 sgot = globals->root.sgot;
7292 splt = globals->root.splt;
7293 srelgot = globals->root.srelgot;
7294 local_got_offsets = elf_local_got_offsets (input_bfd);
7295 local_tlsdesc_gotents = elf32_arm_local_tlsdesc_gotent (input_bfd);
7297 r_symndx = ELF32_R_SYM (rel->r_info);
7299 if (globals->use_rel)
7301 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
7303 if (addend & ((howto->src_mask + 1) >> 1))
7306 signed_addend &= ~ howto->src_mask;
7307 signed_addend |= addend;
7310 signed_addend = addend;
7313 addend = signed_addend = rel->r_addend;
7318 /* We don't need to find a value for this symbol. It's just a
7320 *unresolved_reloc_p = FALSE;
7321 return bfd_reloc_ok;
7324 if (!globals->vxworks_p)
7325 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
7329 case R_ARM_ABS32_NOI:
7331 case R_ARM_REL32_NOI:
7337 /* Handle relocations which should use the PLT entry. ABS32/REL32
7338 will use the symbol's value, which may point to a PLT entry, but we
7339 don't need to handle that here. If we created a PLT entry, all
7340 branches in this object should go to it, except if the PLT is too
7341 far away, in which case a long branch stub should be inserted. */
7342 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
7343 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI
7344 && r_type != R_ARM_CALL
7345 && r_type != R_ARM_JUMP24
7346 && r_type != R_ARM_PLT32)
7349 && h->plt.offset != (bfd_vma) -1)
7351 /* If we've created a .plt section, and assigned a PLT entry to
7352 this function, it should not be known to bind locally. If
7353 it were, we would have cleared the PLT entry. */
7354 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
7356 value = (splt->output_section->vma
7357 + splt->output_offset
7359 *unresolved_reloc_p = FALSE;
7360 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7361 contents, rel->r_offset, value,
7365 /* When generating a shared object or relocatable executable, these
7366 relocations are copied into the output file to be resolved at
7368 if ((info->shared || globals->root.is_relocatable_executable)
7369 && (input_section->flags & SEC_ALLOC)
7370 && !(globals->vxworks_p
7371 && strcmp (input_section->output_section->name,
7373 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
7374 || !SYMBOL_CALLS_LOCAL (info, h))
7375 && (!strstr (input_section->name, STUB_SUFFIX))
7377 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7378 || h->root.type != bfd_link_hash_undefweak)
7379 && r_type != R_ARM_PC24
7380 && r_type != R_ARM_CALL
7381 && r_type != R_ARM_JUMP24
7382 && r_type != R_ARM_PREL31
7383 && r_type != R_ARM_PLT32)
7385 Elf_Internal_Rela outrel;
7386 bfd_boolean skip, relocate;
7388 *unresolved_reloc_p = FALSE;
7392 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
7393 ! globals->use_rel);
7396 return bfd_reloc_notsupported;
7402 outrel.r_addend = addend;
7404 _bfd_elf_section_offset (output_bfd, info, input_section,
7406 if (outrel.r_offset == (bfd_vma) -1)
7408 else if (outrel.r_offset == (bfd_vma) -2)
7409 skip = TRUE, relocate = TRUE;
7410 outrel.r_offset += (input_section->output_section->vma
7411 + input_section->output_offset);
7414 memset (&outrel, 0, sizeof outrel);
7419 || !h->def_regular))
7420 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7425 /* This symbol is local, or marked to become local. */
7426 if (sym_flags == STT_ARM_TFUNC)
7428 if (globals->symbian_p)
7432 /* On Symbian OS, the data segment and text segement
7433 can be relocated independently. Therefore, we
7434 must indicate the segment to which this
7435 relocation is relative. The BPABI allows us to
7436 use any symbol in the right segment; we just use
7437 the section symbol as it is convenient. (We
7438 cannot use the symbol given by "h" directly as it
7439 will not appear in the dynamic symbol table.)
7441 Note that the dynamic linker ignores the section
7442 symbol value, so we don't subtract osec->vma
7443 from the emitted reloc addend. */
7445 osec = sym_sec->output_section;
7447 osec = input_section->output_section;
7448 symbol = elf_section_data (osec)->dynindx;
7451 struct elf_link_hash_table *htab = elf_hash_table (info);
7453 if ((osec->flags & SEC_READONLY) == 0
7454 && htab->data_index_section != NULL)
7455 osec = htab->data_index_section;
7457 osec = htab->text_index_section;
7458 symbol = elf_section_data (osec)->dynindx;
7460 BFD_ASSERT (symbol != 0);
7463 /* On SVR4-ish systems, the dynamic loader cannot
7464 relocate the text and data segments independently,
7465 so the symbol does not matter. */
7467 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
7468 if (globals->use_rel)
7471 outrel.r_addend += value;
7474 elf32_arm_add_dynreloc (output_bfd, info, sreloc, &outrel);
7476 /* If this reloc is against an external symbol, we do not want to
7477 fiddle with the addend. Otherwise, we need to include the symbol
7478 value so that it becomes an addend for the dynamic reloc. */
7480 return bfd_reloc_ok;
7482 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7483 contents, rel->r_offset, value,
7486 else switch (r_type)
7489 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
7491 case R_ARM_XPC25: /* Arm BLX instruction. */
7494 case R_ARM_PC24: /* Arm B/BL instruction. */
7497 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
7499 if (r_type == R_ARM_XPC25)
7501 /* Check for Arm calling Arm function. */
7502 /* FIXME: Should we translate the instruction into a BL
7503 instruction instead ? */
7504 if (sym_flags != STT_ARM_TFUNC)
7505 (*_bfd_error_handler)
7506 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
7508 h ? h->root.root.string : "(local)");
7510 else if (r_type == R_ARM_PC24)
7512 /* Check for Arm calling Thumb function. */
7513 if (sym_flags == STT_ARM_TFUNC)
7515 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
7516 output_bfd, input_section,
7517 hit_data, sym_sec, rel->r_offset,
7518 signed_addend, value,
7520 return bfd_reloc_ok;
7522 return bfd_reloc_dangerous;
7526 /* Check if a stub has to be inserted because the
7527 destination is too far or we are changing mode. */
7528 if ( r_type == R_ARM_CALL
7529 || r_type == R_ARM_JUMP24
7530 || r_type == R_ARM_PLT32)
7532 enum elf32_arm_stub_type stub_type = arm_stub_none;
7533 struct elf32_arm_link_hash_entry *hash;
7535 hash = (struct elf32_arm_link_hash_entry *) h;
7536 stub_type = arm_type_of_stub (info, input_section, rel,
7539 input_bfd, sym_name);
7541 if (stub_type != arm_stub_none)
7543 /* The target is out of reach, so redirect the
7544 branch to the local stub for this function. */
7546 stub_entry = elf32_arm_get_stub_entry (input_section,
7550 if (stub_entry != NULL)
7551 value = (stub_entry->stub_offset
7552 + stub_entry->stub_sec->output_offset
7553 + stub_entry->stub_sec->output_section->vma);
7557 /* If the call goes through a PLT entry, make sure to
7558 check distance to the right destination address. */
7561 && h->plt.offset != (bfd_vma) -1)
7563 value = (splt->output_section->vma
7564 + splt->output_offset
7566 *unresolved_reloc_p = FALSE;
7567 /* The PLT entry is in ARM mode, regardless of the
7569 sym_flags = STT_FUNC;
7574 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
7576 S is the address of the symbol in the relocation.
7577 P is address of the instruction being relocated.
7578 A is the addend (extracted from the instruction) in bytes.
7580 S is held in 'value'.
7581 P is the base address of the section containing the
7582 instruction plus the offset of the reloc into that
7584 (input_section->output_section->vma +
7585 input_section->output_offset +
7587 A is the addend, converted into bytes, ie:
7590 Note: None of these operations have knowledge of the pipeline
7591 size of the processor, thus it is up to the assembler to
7592 encode this information into the addend. */
7593 value -= (input_section->output_section->vma
7594 + input_section->output_offset);
7595 value -= rel->r_offset;
7596 if (globals->use_rel)
7597 value += (signed_addend << howto->size);
7599 /* RELA addends do not have to be adjusted by howto->size. */
7600 value += signed_addend;
7602 signed_addend = value;
7603 signed_addend >>= howto->rightshift;
7605 /* A branch to an undefined weak symbol is turned into a jump to
7606 the next instruction unless a PLT entry will be created.
7607 Do the same for local undefined symbols (but not for STN_UNDEF).
7608 The jump to the next instruction is optimized as a NOP depending
7609 on the architecture. */
7610 if (h ? (h->root.type == bfd_link_hash_undefweak
7611 && !(splt != NULL && h->plt.offset != (bfd_vma) -1))
7612 : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec))
7614 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000);
7616 if (arch_has_arm_nop (globals))
7617 value |= 0x0320f000;
7619 value |= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
7623 /* Perform a signed range check. */
7624 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
7625 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
7626 return bfd_reloc_overflow;
7628 addend = (value & 2);
7630 value = (signed_addend & howto->dst_mask)
7631 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
7633 if (r_type == R_ARM_CALL)
7635 /* Set the H bit in the BLX instruction. */
7636 if (sym_flags == STT_ARM_TFUNC)
7641 value &= ~(bfd_vma)(1 << 24);
7644 /* Select the correct instruction (BL or BLX). */
7645 /* Only if we are not handling a BL to a stub. In this
7646 case, mode switching is performed by the stub. */
7647 if (sym_flags == STT_ARM_TFUNC && !stub_entry)
7651 value &= ~(bfd_vma)(1 << 28);
7661 if (sym_flags == STT_ARM_TFUNC)
7665 case R_ARM_ABS32_NOI:
7671 if (sym_flags == STT_ARM_TFUNC)
7673 value -= (input_section->output_section->vma
7674 + input_section->output_offset + rel->r_offset);
7677 case R_ARM_REL32_NOI:
7679 value -= (input_section->output_section->vma
7680 + input_section->output_offset + rel->r_offset);
7684 value -= (input_section->output_section->vma
7685 + input_section->output_offset + rel->r_offset);
7686 value += signed_addend;
7687 if (! h || h->root.type != bfd_link_hash_undefweak)
7689 /* Check for overflow. */
7690 if ((value ^ (value >> 1)) & (1 << 30))
7691 return bfd_reloc_overflow;
7693 value &= 0x7fffffff;
7694 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
7695 if (sym_flags == STT_ARM_TFUNC)
7700 bfd_put_32 (input_bfd, value, hit_data);
7701 return bfd_reloc_ok;
7706 /* There is no way to tell whether the user intended to use a signed or
7707 unsigned addend. When checking for overflow we accept either,
7708 as specified by the AAELF. */
7709 if ((long) value > 0xff || (long) value < -0x80)
7710 return bfd_reloc_overflow;
7712 bfd_put_8 (input_bfd, value, hit_data);
7713 return bfd_reloc_ok;
7718 /* See comment for R_ARM_ABS8. */
7719 if ((long) value > 0xffff || (long) value < -0x8000)
7720 return bfd_reloc_overflow;
7722 bfd_put_16 (input_bfd, value, hit_data);
7723 return bfd_reloc_ok;
7725 case R_ARM_THM_ABS5:
7726 /* Support ldr and str instructions for the thumb. */
7727 if (globals->use_rel)
7729 /* Need to refetch addend. */
7730 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
7731 /* ??? Need to determine shift amount from operand size. */
7732 addend >>= howto->rightshift;
7736 /* ??? Isn't value unsigned? */
7737 if ((long) value > 0x1f || (long) value < -0x10)
7738 return bfd_reloc_overflow;
7740 /* ??? Value needs to be properly shifted into place first. */
7741 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
7742 bfd_put_16 (input_bfd, value, hit_data);
7743 return bfd_reloc_ok;
7745 case R_ARM_THM_ALU_PREL_11_0:
7746 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
7749 bfd_signed_vma relocation;
7751 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
7752 | bfd_get_16 (input_bfd, hit_data + 2);
7754 if (globals->use_rel)
7756 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
7757 | ((insn & (1 << 26)) >> 15);
7758 if (insn & 0xf00000)
7759 signed_addend = -signed_addend;
7762 relocation = value + signed_addend;
7763 relocation -= (input_section->output_section->vma
7764 + input_section->output_offset
7767 value = abs (relocation);
7769 if (value >= 0x1000)
7770 return bfd_reloc_overflow;
7772 insn = (insn & 0xfb0f8f00) | (value & 0xff)
7773 | ((value & 0x700) << 4)
7774 | ((value & 0x800) << 15);
7778 bfd_put_16 (input_bfd, insn >> 16, hit_data);
7779 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
7781 return bfd_reloc_ok;
7785 /* PR 10073: This reloc is not generated by the GNU toolchain,
7786 but it is supported for compatibility with third party libraries
7787 generated by other compilers, specifically the ARM/IAR. */
7790 bfd_signed_vma relocation;
7792 insn = bfd_get_16 (input_bfd, hit_data);
7794 if (globals->use_rel)
7795 addend = (insn & 0x00ff) << 2;
7797 relocation = value + addend;
7798 relocation -= (input_section->output_section->vma
7799 + input_section->output_offset
7802 value = abs (relocation);
7804 /* We do not check for overflow of this reloc. Although strictly
7805 speaking this is incorrect, it appears to be necessary in order
7806 to work with IAR generated relocs. Since GCC and GAS do not
7807 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
7808 a problem for them. */
7811 insn = (insn & 0xff00) | (value >> 2);
7813 bfd_put_16 (input_bfd, insn, hit_data);
7815 return bfd_reloc_ok;
7818 case R_ARM_THM_PC12:
7819 /* Corresponds to: ldr.w reg, [pc, #offset]. */
7822 bfd_signed_vma relocation;
7824 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
7825 | bfd_get_16 (input_bfd, hit_data + 2);
7827 if (globals->use_rel)
7829 signed_addend = insn & 0xfff;
7830 if (!(insn & (1 << 23)))
7831 signed_addend = -signed_addend;
7834 relocation = value + signed_addend;
7835 relocation -= (input_section->output_section->vma
7836 + input_section->output_offset
7839 value = abs (relocation);
7841 if (value >= 0x1000)
7842 return bfd_reloc_overflow;
7844 insn = (insn & 0xff7ff000) | value;
7845 if (relocation >= 0)
7848 bfd_put_16 (input_bfd, insn >> 16, hit_data);
7849 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
7851 return bfd_reloc_ok;
7854 case R_ARM_THM_XPC22:
7855 case R_ARM_THM_CALL:
7856 case R_ARM_THM_JUMP24:
7857 /* Thumb BL (branch long instruction). */
7861 bfd_boolean overflow = FALSE;
7862 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
7863 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
7864 bfd_signed_vma reloc_signed_max;
7865 bfd_signed_vma reloc_signed_min;
7867 bfd_signed_vma signed_check;
7869 const int thumb2 = using_thumb2 (globals);
7871 /* A branch to an undefined weak symbol is turned into a jump to
7872 the next instruction unless a PLT entry will be created.
7873 The jump to the next instruction is optimized as a NOP.W for
7874 Thumb-2 enabled architectures. */
7875 if (h && h->root.type == bfd_link_hash_undefweak
7876 && !(splt != NULL && h->plt.offset != (bfd_vma) -1))
7878 if (arch_has_thumb2_nop (globals))
7880 bfd_put_16 (input_bfd, 0xf3af, hit_data);
7881 bfd_put_16 (input_bfd, 0x8000, hit_data + 2);
7885 bfd_put_16 (input_bfd, 0xe000, hit_data);
7886 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
7888 return bfd_reloc_ok;
7891 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
7892 with Thumb-1) involving the J1 and J2 bits. */
7893 if (globals->use_rel)
7895 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
7896 bfd_vma upper = upper_insn & 0x3ff;
7897 bfd_vma lower = lower_insn & 0x7ff;
7898 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
7899 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
7900 bfd_vma i1 = j1 ^ s ? 0 : 1;
7901 bfd_vma i2 = j2 ^ s ? 0 : 1;
7903 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
7905 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
7907 signed_addend = addend;
7910 if (r_type == R_ARM_THM_XPC22)
7912 /* Check for Thumb to Thumb call. */
7913 /* FIXME: Should we translate the instruction into a BL
7914 instruction instead ? */
7915 if (sym_flags == STT_ARM_TFUNC)
7916 (*_bfd_error_handler)
7917 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
7919 h ? h->root.root.string : "(local)");
7923 /* If it is not a call to Thumb, assume call to Arm.
7924 If it is a call relative to a section name, then it is not a
7925 function call at all, but rather a long jump. Calls through
7926 the PLT do not require stubs. */
7927 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
7928 && (h == NULL || splt == NULL
7929 || h->plt.offset == (bfd_vma) -1))
7931 if (globals->use_blx && r_type == R_ARM_THM_CALL)
7933 /* Convert BL to BLX. */
7934 lower_insn = (lower_insn & ~0x1000) | 0x0800;
7936 else if (( r_type != R_ARM_THM_CALL)
7937 && (r_type != R_ARM_THM_JUMP24))
7939 if (elf32_thumb_to_arm_stub
7940 (info, sym_name, input_bfd, output_bfd, input_section,
7941 hit_data, sym_sec, rel->r_offset, signed_addend, value,
7943 return bfd_reloc_ok;
7945 return bfd_reloc_dangerous;
7948 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
7949 && r_type == R_ARM_THM_CALL)
7951 /* Make sure this is a BL. */
7952 lower_insn |= 0x1800;
7956 enum elf32_arm_stub_type stub_type = arm_stub_none;
7957 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
7959 /* Check if a stub has to be inserted because the destination
7961 struct elf32_arm_stub_hash_entry *stub_entry;
7962 struct elf32_arm_link_hash_entry *hash;
7964 hash = (struct elf32_arm_link_hash_entry *) h;
7966 stub_type = arm_type_of_stub (info, input_section, rel,
7967 &sym_flags, hash, value, sym_sec,
7968 input_bfd, sym_name);
7970 if (stub_type != arm_stub_none)
7972 /* The target is out of reach or we are changing modes, so
7973 redirect the branch to the local stub for this
7975 stub_entry = elf32_arm_get_stub_entry (input_section,
7979 if (stub_entry != NULL)
7980 value = (stub_entry->stub_offset
7981 + stub_entry->stub_sec->output_offset
7982 + stub_entry->stub_sec->output_section->vma);
7984 /* If this call becomes a call to Arm, force BLX. */
7985 if (globals->use_blx && (r_type == R_ARM_THM_CALL))
7988 && !arm_stub_is_thumb (stub_entry->stub_type))
7989 || (sym_flags != STT_ARM_TFUNC))
7990 lower_insn = (lower_insn & ~0x1000) | 0x0800;
7995 /* Handle calls via the PLT. */
7996 if (stub_type == arm_stub_none
7999 && h->plt.offset != (bfd_vma) -1)
8001 value = (splt->output_section->vma
8002 + splt->output_offset
8005 if (globals->use_blx && r_type == R_ARM_THM_CALL)
8007 /* If the Thumb BLX instruction is available, convert
8008 the BL to a BLX instruction to call the ARM-mode
8010 lower_insn = (lower_insn & ~0x1000) | 0x0800;
8011 sym_flags = STT_FUNC;
8015 /* Target the Thumb stub before the ARM PLT entry. */
8016 value -= PLT_THUMB_STUB_SIZE;
8017 sym_flags = STT_ARM_TFUNC;
8019 *unresolved_reloc_p = FALSE;
8022 relocation = value + signed_addend;
8024 relocation -= (input_section->output_section->vma
8025 + input_section->output_offset
8028 check = relocation >> howto->rightshift;
8030 /* If this is a signed value, the rightshift just dropped
8031 leading 1 bits (assuming twos complement). */
8032 if ((bfd_signed_vma) relocation >= 0)
8033 signed_check = check;
8035 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
8037 /* Calculate the permissable maximum and minimum values for
8038 this relocation according to whether we're relocating for
8040 bitsize = howto->bitsize;
8043 reloc_signed_max = (1 << (bitsize - 1)) - 1;
8044 reloc_signed_min = ~reloc_signed_max;
8046 /* Assumes two's complement. */
8047 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
8050 if ((lower_insn & 0x5000) == 0x4000)
8051 /* For a BLX instruction, make sure that the relocation is rounded up
8052 to a word boundary. This follows the semantics of the instruction
8053 which specifies that bit 1 of the target address will come from bit
8054 1 of the base address. */
8055 relocation = (relocation + 2) & ~ 3;
8057 /* Put RELOCATION back into the insn. Assumes two's complement.
8058 We use the Thumb-2 encoding, which is safe even if dealing with
8059 a Thumb-1 instruction by virtue of our overflow check above. */
8060 reloc_sign = (signed_check < 0) ? 1 : 0;
8061 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
8062 | ((relocation >> 12) & 0x3ff)
8063 | (reloc_sign << 10);
8064 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
8065 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
8066 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
8067 | ((relocation >> 1) & 0x7ff);
8069 /* Put the relocated value back in the object file: */
8070 bfd_put_16 (input_bfd, upper_insn, hit_data);
8071 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
8073 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
8077 case R_ARM_THM_JUMP19:
8078 /* Thumb32 conditional branch instruction. */
8081 bfd_boolean overflow = FALSE;
8082 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
8083 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
8084 bfd_signed_vma reloc_signed_max = 0xffffe;
8085 bfd_signed_vma reloc_signed_min = -0x100000;
8086 bfd_signed_vma signed_check;
8088 /* Need to refetch the addend, reconstruct the top three bits,
8089 and squish the two 11 bit pieces together. */
8090 if (globals->use_rel)
8092 bfd_vma S = (upper_insn & 0x0400) >> 10;
8093 bfd_vma upper = (upper_insn & 0x003f);
8094 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
8095 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
8096 bfd_vma lower = (lower_insn & 0x07ff);
8101 upper -= 0x0100; /* Sign extend. */
8103 addend = (upper << 12) | (lower << 1);
8104 signed_addend = addend;
8107 /* Handle calls via the PLT. */
8108 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
8110 value = (splt->output_section->vma
8111 + splt->output_offset
8113 /* Target the Thumb stub before the ARM PLT entry. */
8114 value -= PLT_THUMB_STUB_SIZE;
8115 *unresolved_reloc_p = FALSE;
8118 /* ??? Should handle interworking? GCC might someday try to
8119 use this for tail calls. */
8121 relocation = value + signed_addend;
8122 relocation -= (input_section->output_section->vma
8123 + input_section->output_offset
8125 signed_check = (bfd_signed_vma) relocation;
8127 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
8130 /* Put RELOCATION back into the insn. */
8132 bfd_vma S = (relocation & 0x00100000) >> 20;
8133 bfd_vma J2 = (relocation & 0x00080000) >> 19;
8134 bfd_vma J1 = (relocation & 0x00040000) >> 18;
8135 bfd_vma hi = (relocation & 0x0003f000) >> 12;
8136 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
8138 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
8139 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
8142 /* Put the relocated value back in the object file: */
8143 bfd_put_16 (input_bfd, upper_insn, hit_data);
8144 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
8146 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
8149 case R_ARM_THM_JUMP11:
8150 case R_ARM_THM_JUMP8:
8151 case R_ARM_THM_JUMP6:
8152 /* Thumb B (branch) instruction). */
8154 bfd_signed_vma relocation;
8155 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
8156 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
8157 bfd_signed_vma signed_check;
8159 /* CZB cannot jump backward. */
8160 if (r_type == R_ARM_THM_JUMP6)
8161 reloc_signed_min = 0;
8163 if (globals->use_rel)
8165 /* Need to refetch addend. */
8166 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
8167 if (addend & ((howto->src_mask + 1) >> 1))
8170 signed_addend &= ~ howto->src_mask;
8171 signed_addend |= addend;
8174 signed_addend = addend;
8175 /* The value in the insn has been right shifted. We need to
8176 undo this, so that we can perform the address calculation
8177 in terms of bytes. */
8178 signed_addend <<= howto->rightshift;
8180 relocation = value + signed_addend;
8182 relocation -= (input_section->output_section->vma
8183 + input_section->output_offset
8186 relocation >>= howto->rightshift;
8187 signed_check = relocation;
8189 if (r_type == R_ARM_THM_JUMP6)
8190 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
8192 relocation &= howto->dst_mask;
8193 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
8195 bfd_put_16 (input_bfd, relocation, hit_data);
8197 /* Assumes two's complement. */
8198 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
8199 return bfd_reloc_overflow;
8201 return bfd_reloc_ok;
8204 case R_ARM_ALU_PCREL7_0:
8205 case R_ARM_ALU_PCREL15_8:
8206 case R_ARM_ALU_PCREL23_15:
8211 insn = bfd_get_32 (input_bfd, hit_data);
8212 if (globals->use_rel)
8214 /* Extract the addend. */
8215 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
8216 signed_addend = addend;
8218 relocation = value + signed_addend;
8220 relocation -= (input_section->output_section->vma
8221 + input_section->output_offset
8223 insn = (insn & ~0xfff)
8224 | ((howto->bitpos << 7) & 0xf00)
8225 | ((relocation >> howto->bitpos) & 0xff);
8226 bfd_put_32 (input_bfd, value, hit_data);
8228 return bfd_reloc_ok;
8230 case R_ARM_GNU_VTINHERIT:
8231 case R_ARM_GNU_VTENTRY:
8232 return bfd_reloc_ok;
8234 case R_ARM_GOTOFF32:
8235 /* Relocation is relative to the start of the
8236 global offset table. */
8238 BFD_ASSERT (sgot != NULL);
8240 return bfd_reloc_notsupported;
8242 /* If we are addressing a Thumb function, we need to adjust the
8243 address by one, so that attempts to call the function pointer will
8244 correctly interpret it as Thumb code. */
8245 if (sym_flags == STT_ARM_TFUNC)
8248 /* Note that sgot->output_offset is not involved in this
8249 calculation. We always want the start of .got. If we
8250 define _GLOBAL_OFFSET_TABLE in a different way, as is
8251 permitted by the ABI, we might have to change this
8253 value -= sgot->output_section->vma;
8254 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8255 contents, rel->r_offset, value,
8259 /* Use global offset table as symbol value. */
8260 BFD_ASSERT (sgot != NULL);
8263 return bfd_reloc_notsupported;
8265 *unresolved_reloc_p = FALSE;
8266 value = sgot->output_section->vma;
8267 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8268 contents, rel->r_offset, value,
8272 case R_ARM_GOT_PREL:
8273 /* Relocation is to the entry for this symbol in the
8274 global offset table. */
8276 return bfd_reloc_notsupported;
8282 off = h->got.offset;
8283 BFD_ASSERT (off != (bfd_vma) -1);
8286 /* We have already processsed one GOT relocation against
8289 if (globals->root.dynamic_sections_created
8290 && !SYMBOL_REFERENCES_LOCAL (info, h))
8291 *unresolved_reloc_p = FALSE;
8295 Elf_Internal_Rela outrel;
8297 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8299 /* If the symbol doesn't resolve locally in a static
8300 object, we have an undefined reference. If the
8301 symbol doesn't resolve locally in a dynamic object,
8302 it should be resolved by the dynamic linker. */
8303 if (globals->root.dynamic_sections_created)
8305 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8306 *unresolved_reloc_p = FALSE;
8310 outrel.r_addend = 0;
8315 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
8318 outrel.r_addend = value;
8319 if (sym_flags == STT_ARM_TFUNC)
8320 outrel.r_addend |= 1;
8323 /* The GOT entry is initialized to zero by default.
8324 See if we should install a different value. */
8325 if (outrel.r_addend != 0
8326 && (outrel.r_info == 0 || globals->use_rel))
8328 bfd_put_32 (output_bfd, outrel.r_addend,
8329 sgot->contents + off);
8330 outrel.r_addend = 0;
8333 if (outrel.r_info != 0)
8335 outrel.r_offset = (sgot->output_section->vma
8336 + sgot->output_offset
8338 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
8342 value = sgot->output_offset + off;
8348 BFD_ASSERT (local_got_offsets != NULL &&
8349 local_got_offsets[r_symndx] != (bfd_vma) -1);
8351 off = local_got_offsets[r_symndx];
8353 /* The offset must always be a multiple of 4. We use the
8354 least significant bit to record whether we have already
8355 generated the necessary reloc. */
8360 /* If we are addressing a Thumb function, we need to
8361 adjust the address by one, so that attempts to
8362 call the function pointer will correctly
8363 interpret it as Thumb code. */
8364 if (sym_flags == STT_ARM_TFUNC)
8367 if (globals->use_rel)
8368 bfd_put_32 (output_bfd, value, sgot->contents + off);
8372 Elf_Internal_Rela outrel;
8374 BFD_ASSERT (srelgot != NULL);
8376 outrel.r_addend = addend + value;
8377 outrel.r_offset = (sgot->output_section->vma
8378 + sgot->output_offset
8380 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
8381 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
8384 local_got_offsets[r_symndx] |= 1;
8387 value = sgot->output_offset + off;
8389 if (r_type != R_ARM_GOT32)
8390 value += sgot->output_section->vma;
8392 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8393 contents, rel->r_offset, value,
8396 case R_ARM_TLS_LDO32:
8397 value = value - dtpoff_base (info);
8399 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8400 contents, rel->r_offset, value,
8403 case R_ARM_TLS_LDM32:
8410 off = globals->tls_ldm_got.offset;
8416 /* If we don't know the module number, create a relocation
8420 Elf_Internal_Rela outrel;
8422 if (srelgot == NULL)
8425 outrel.r_addend = 0;
8426 outrel.r_offset = (sgot->output_section->vma
8427 + sgot->output_offset + off);
8428 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
8430 if (globals->use_rel)
8431 bfd_put_32 (output_bfd, outrel.r_addend,
8432 sgot->contents + off);
8434 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
8437 bfd_put_32 (output_bfd, 1, sgot->contents + off);
8439 globals->tls_ldm_got.offset |= 1;
8442 value = sgot->output_section->vma + sgot->output_offset + off
8443 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
8445 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8446 contents, rel->r_offset, value,
8450 case R_ARM_TLS_CALL:
8451 case R_ARM_THM_TLS_CALL:
8452 case R_ARM_TLS_GD32:
8453 case R_ARM_TLS_IE32:
8454 case R_ARM_TLS_GOTDESC:
8455 case R_ARM_TLS_DESCSEQ:
8456 case R_ARM_THM_TLS_DESCSEQ:
8458 bfd_vma off, offplt;
8462 BFD_ASSERT (sgot != NULL);
8467 dyn = globals->root.dynamic_sections_created;
8468 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8470 || !SYMBOL_REFERENCES_LOCAL (info, h)))
8472 *unresolved_reloc_p = FALSE;
8475 off = h->got.offset;
8476 offplt = elf32_arm_hash_entry (h)->tlsdesc_got;
8477 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
8481 BFD_ASSERT (local_got_offsets != NULL);
8482 off = local_got_offsets[r_symndx];
8483 offplt = local_tlsdesc_gotents[r_symndx];
8484 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
8487 /* Linker relaxations happens from one of the
8488 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
8489 if (ELF32_R_TYPE(rel->r_info) != r_type)
8490 tls_type = GOT_TLS_IE;
8492 BFD_ASSERT (tls_type != GOT_UNKNOWN);
8498 bfd_boolean need_relocs = FALSE;
8499 Elf_Internal_Rela outrel;
8502 /* The GOT entries have not been initialized yet. Do it
8503 now, and emit any relocations. If both an IE GOT and a
8504 GD GOT are necessary, we emit the GD first. */
8506 if ((info->shared || indx != 0)
8508 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8509 || h->root.type != bfd_link_hash_undefweak))
8512 BFD_ASSERT (srelgot != NULL);
8515 if (tls_type & GOT_TLS_GDESC)
8519 /* We should have relaxed, unless this is an undefined
8521 BFD_ASSERT ((h && (h->root.type == bfd_link_hash_undefweak))
8523 BFD_ASSERT (globals->sgotplt_jump_table_size + offplt + 8
8524 <= globals->root.sgotplt->size);
8526 outrel.r_addend = 0;
8527 outrel.r_offset = (globals->root.sgotplt->output_section->vma
8528 + globals->root.sgotplt->output_offset
8530 + globals->sgotplt_jump_table_size);
8532 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DESC);
8533 sreloc = globals->root.srelplt;
8534 loc = sreloc->contents;
8535 loc += globals->next_tls_desc_index++ * RELOC_SIZE (globals);
8536 BFD_ASSERT (loc + RELOC_SIZE (globals)
8537 <= sreloc->contents + sreloc->size);
8539 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
8541 /* For globals, the first word in the relocation gets
8542 the relocation index and the top bit set, or zero,
8543 if we're binding now. For locals, it gets the
8544 symbol's offset in the tls section. */
8545 bfd_put_32 (output_bfd,
8546 !h ? value - elf_hash_table (info)->tls_sec->vma
8547 : info->flags & DF_BIND_NOW ? 0
8548 : 0x80000000 | ELF32_R_SYM (outrel.r_info),
8549 globals->root.sgotplt->contents + offplt +
8550 globals->sgotplt_jump_table_size);
8552 /* Second word in the relocation is always zero. */
8553 bfd_put_32 (output_bfd, 0,
8554 globals->root.sgotplt->contents + offplt +
8555 globals->sgotplt_jump_table_size + 4);
8557 if (tls_type & GOT_TLS_GD)
8561 outrel.r_addend = 0;
8562 outrel.r_offset = (sgot->output_section->vma
8563 + sgot->output_offset
8565 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
8567 if (globals->use_rel)
8568 bfd_put_32 (output_bfd, outrel.r_addend,
8569 sgot->contents + cur_off);
8571 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
8574 bfd_put_32 (output_bfd, value - dtpoff_base (info),
8575 sgot->contents + cur_off + 4);
8578 outrel.r_addend = 0;
8579 outrel.r_info = ELF32_R_INFO (indx,
8580 R_ARM_TLS_DTPOFF32);
8581 outrel.r_offset += 4;
8583 if (globals->use_rel)
8584 bfd_put_32 (output_bfd, outrel.r_addend,
8585 sgot->contents + cur_off + 4);
8587 elf32_arm_add_dynreloc (output_bfd, info,
8593 /* If we are not emitting relocations for a
8594 general dynamic reference, then we must be in a
8595 static link or an executable link with the
8596 symbol binding locally. Mark it as belonging
8597 to module 1, the executable. */
8598 bfd_put_32 (output_bfd, 1,
8599 sgot->contents + cur_off);
8600 bfd_put_32 (output_bfd, value - dtpoff_base (info),
8601 sgot->contents + cur_off + 4);
8607 if (tls_type & GOT_TLS_IE)
8612 outrel.r_addend = value - dtpoff_base (info);
8614 outrel.r_addend = 0;
8615 outrel.r_offset = (sgot->output_section->vma
8616 + sgot->output_offset
8618 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
8620 if (globals->use_rel)
8621 bfd_put_32 (output_bfd, outrel.r_addend,
8622 sgot->contents + cur_off);
8624 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
8627 bfd_put_32 (output_bfd, tpoff (info, value),
8628 sgot->contents + cur_off);
8635 local_got_offsets[r_symndx] |= 1;
8638 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
8640 else if (tls_type & GOT_TLS_GDESC)
8643 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL
8644 || ELF32_R_TYPE(rel->r_info) == R_ARM_THM_TLS_CALL)
8646 bfd_signed_vma offset;
8647 enum elf32_arm_stub_type stub_type
8648 = arm_type_of_stub (info, input_section, rel, &sym_flags,
8649 (struct elf32_arm_link_hash_entry *)h,
8650 globals->tls_trampoline, globals->root.splt,
8651 input_bfd, sym_name);
8653 if (stub_type != arm_stub_none)
8655 struct elf32_arm_stub_hash_entry *stub_entry
8656 = elf32_arm_get_stub_entry
8657 (input_section, globals->root.splt, 0, rel,
8658 globals, stub_type);
8659 offset = (stub_entry->stub_offset
8660 + stub_entry->stub_sec->output_offset
8661 + stub_entry->stub_sec->output_section->vma);
8664 offset = (globals->root.splt->output_section->vma
8665 + globals->root.splt->output_offset
8666 + globals->tls_trampoline);
8668 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL)
8672 offset -= (input_section->output_section->vma +
8673 input_section->output_offset + rel->r_offset + 8);
8677 value = inst | (globals->use_blx ? 0xfa000000 : 0xeb000000);
8681 /* Thumb blx encodes the offset in a complicated
8683 unsigned upper_insn, lower_insn;
8686 offset -= (input_section->output_section->vma +
8687 input_section->output_offset
8688 + rel->r_offset + 4);
8690 /* Round up the offset to a word boundary */
8691 offset = (offset + 2) & ~2;
8693 upper_insn = (0xf000
8694 | ((offset >> 12) & 0x3ff)
8696 lower_insn = (0xc000
8697 | (((!((offset >> 23) & 1)) ^ neg) << 13)
8698 | (((!((offset >> 22) & 1)) ^ neg) << 11)
8699 | ((offset >> 1) & 0x7ff));
8700 bfd_put_16 (input_bfd, upper_insn, hit_data);
8701 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
8702 return bfd_reloc_ok;
8705 /* These relocations needs special care, as besides the fact
8706 they point somewhere in .gotplt, the addend must be
8707 adjusted accordingly depending on the type of instruction
8709 else if ((r_type == R_ARM_TLS_GOTDESC) && (tls_type & GOT_TLS_GDESC))
8711 unsigned long data, insn;
8714 data = bfd_get_32 (input_bfd, hit_data);
8720 insn = bfd_get_16 (input_bfd, contents + rel->r_offset - data);
8721 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
8723 | bfd_get_16 (input_bfd,
8724 contents + rel->r_offset - data + 2);
8725 if ((insn & 0xf800c000) == 0xf000c000)
8728 else if ((insn & 0xffffff00) == 0x4400)
8733 (*_bfd_error_handler)
8734 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
8735 input_bfd, input_section,
8736 (unsigned long)rel->r_offset, insn);
8737 return bfd_reloc_notsupported;
8742 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - data);
8747 case 0xfa: /* blx */
8751 case 0xe0: /* add */
8756 (*_bfd_error_handler)
8757 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
8758 input_bfd, input_section,
8759 (unsigned long)rel->r_offset, insn);
8760 return bfd_reloc_notsupported;
8764 value += ((globals->root.sgotplt->output_section->vma
8765 + globals->root.sgotplt->output_offset + off)
8766 - (input_section->output_section->vma
8767 + input_section->output_offset
8769 + globals->sgotplt_jump_table_size);
8772 value = ((globals->root.sgot->output_section->vma
8773 + globals->root.sgot->output_offset + off)
8774 - (input_section->output_section->vma
8775 + input_section->output_offset + rel->r_offset));
8777 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8778 contents, rel->r_offset, value,
8782 case R_ARM_TLS_LE32:
8785 (*_bfd_error_handler)
8786 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
8787 input_bfd, input_section,
8788 (long) rel->r_offset, howto->name);
8789 return (bfd_reloc_status_type) FALSE;
8792 value = tpoff (info, value);
8794 return _bfd_final_link_relocate (howto, input_bfd, input_section,
8795 contents, rel->r_offset, value,
8799 if (globals->fix_v4bx)
8801 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
8803 /* Ensure that we have a BX instruction. */
8804 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
8806 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
8808 /* Branch to veneer. */
8810 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
8811 glue_addr -= input_section->output_section->vma
8812 + input_section->output_offset
8813 + rel->r_offset + 8;
8814 insn = (insn & 0xf0000000) | 0x0a000000
8815 | ((glue_addr >> 2) & 0x00ffffff);
8819 /* Preserve Rm (lowest four bits) and the condition code
8820 (highest four bits). Other bits encode MOV PC,Rm. */
8821 insn = (insn & 0xf000000f) | 0x01a0f000;
8824 bfd_put_32 (input_bfd, insn, hit_data);
8826 return bfd_reloc_ok;
8828 case R_ARM_MOVW_ABS_NC:
8829 case R_ARM_MOVT_ABS:
8830 case R_ARM_MOVW_PREL_NC:
8831 case R_ARM_MOVT_PREL:
8832 /* Until we properly support segment-base-relative addressing then
8833 we assume the segment base to be zero, as for the group relocations.
8834 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
8835 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
8836 case R_ARM_MOVW_BREL_NC:
8837 case R_ARM_MOVW_BREL:
8838 case R_ARM_MOVT_BREL:
8840 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
8842 if (globals->use_rel)
8844 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
8845 signed_addend = (addend ^ 0x8000) - 0x8000;
8848 value += signed_addend;
8850 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
8851 value -= (input_section->output_section->vma
8852 + input_section->output_offset + rel->r_offset);
8854 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
8855 return bfd_reloc_overflow;
8857 if (sym_flags == STT_ARM_TFUNC)
8860 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
8861 || r_type == R_ARM_MOVT_BREL)
8865 insn |= value & 0xfff;
8866 insn |= (value & 0xf000) << 4;
8867 bfd_put_32 (input_bfd, insn, hit_data);
8869 return bfd_reloc_ok;
8871 case R_ARM_THM_MOVW_ABS_NC:
8872 case R_ARM_THM_MOVT_ABS:
8873 case R_ARM_THM_MOVW_PREL_NC:
8874 case R_ARM_THM_MOVT_PREL:
8875 /* Until we properly support segment-base-relative addressing then
8876 we assume the segment base to be zero, as for the above relocations.
8877 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
8878 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
8879 as R_ARM_THM_MOVT_ABS. */
8880 case R_ARM_THM_MOVW_BREL_NC:
8881 case R_ARM_THM_MOVW_BREL:
8882 case R_ARM_THM_MOVT_BREL:
8886 insn = bfd_get_16 (input_bfd, hit_data) << 16;
8887 insn |= bfd_get_16 (input_bfd, hit_data + 2);
8889 if (globals->use_rel)
8891 addend = ((insn >> 4) & 0xf000)
8892 | ((insn >> 15) & 0x0800)
8893 | ((insn >> 4) & 0x0700)
8895 signed_addend = (addend ^ 0x8000) - 0x8000;
8898 value += signed_addend;
8900 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
8901 value -= (input_section->output_section->vma
8902 + input_section->output_offset + rel->r_offset);
8904 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
8905 return bfd_reloc_overflow;
8907 if (sym_flags == STT_ARM_TFUNC)
8910 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
8911 || r_type == R_ARM_THM_MOVT_BREL)
8915 insn |= (value & 0xf000) << 4;
8916 insn |= (value & 0x0800) << 15;
8917 insn |= (value & 0x0700) << 4;
8918 insn |= (value & 0x00ff);
8920 bfd_put_16 (input_bfd, insn >> 16, hit_data);
8921 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
8923 return bfd_reloc_ok;
8925 case R_ARM_ALU_PC_G0_NC:
8926 case R_ARM_ALU_PC_G1_NC:
8927 case R_ARM_ALU_PC_G0:
8928 case R_ARM_ALU_PC_G1:
8929 case R_ARM_ALU_PC_G2:
8930 case R_ARM_ALU_SB_G0_NC:
8931 case R_ARM_ALU_SB_G1_NC:
8932 case R_ARM_ALU_SB_G0:
8933 case R_ARM_ALU_SB_G1:
8934 case R_ARM_ALU_SB_G2:
8936 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
8937 bfd_vma pc = input_section->output_section->vma
8938 + input_section->output_offset + rel->r_offset;
8939 /* sb should be the origin of the *segment* containing the symbol.
8940 It is not clear how to obtain this OS-dependent value, so we
8941 make an arbitrary choice of zero. */
8945 bfd_signed_vma signed_value;
8948 /* Determine which group of bits to select. */
8951 case R_ARM_ALU_PC_G0_NC:
8952 case R_ARM_ALU_PC_G0:
8953 case R_ARM_ALU_SB_G0_NC:
8954 case R_ARM_ALU_SB_G0:
8958 case R_ARM_ALU_PC_G1_NC:
8959 case R_ARM_ALU_PC_G1:
8960 case R_ARM_ALU_SB_G1_NC:
8961 case R_ARM_ALU_SB_G1:
8965 case R_ARM_ALU_PC_G2:
8966 case R_ARM_ALU_SB_G2:
8974 /* If REL, extract the addend from the insn. If RELA, it will
8975 have already been fetched for us. */
8976 if (globals->use_rel)
8979 bfd_vma constant = insn & 0xff;
8980 bfd_vma rotation = (insn & 0xf00) >> 8;
8983 signed_addend = constant;
8986 /* Compensate for the fact that in the instruction, the
8987 rotation is stored in multiples of 2 bits. */
8990 /* Rotate "constant" right by "rotation" bits. */
8991 signed_addend = (constant >> rotation) |
8992 (constant << (8 * sizeof (bfd_vma) - rotation));
8995 /* Determine if the instruction is an ADD or a SUB.
8996 (For REL, this determines the sign of the addend.) */
8997 negative = identify_add_or_sub (insn);
9000 (*_bfd_error_handler)
9001 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
9002 input_bfd, input_section,
9003 (long) rel->r_offset, howto->name);
9004 return bfd_reloc_overflow;
9007 signed_addend *= negative;
9010 /* Compute the value (X) to go in the place. */
9011 if (r_type == R_ARM_ALU_PC_G0_NC
9012 || r_type == R_ARM_ALU_PC_G1_NC
9013 || r_type == R_ARM_ALU_PC_G0
9014 || r_type == R_ARM_ALU_PC_G1
9015 || r_type == R_ARM_ALU_PC_G2)
9017 signed_value = value - pc + signed_addend;
9019 /* Section base relative. */
9020 signed_value = value - sb + signed_addend;
9022 /* If the target symbol is a Thumb function, then set the
9023 Thumb bit in the address. */
9024 if (sym_flags == STT_ARM_TFUNC)
9027 /* Calculate the value of the relevant G_n, in encoded
9028 constant-with-rotation format. */
9029 g_n = calculate_group_reloc_mask (abs (signed_value), group,
9032 /* Check for overflow if required. */
9033 if ((r_type == R_ARM_ALU_PC_G0
9034 || r_type == R_ARM_ALU_PC_G1
9035 || r_type == R_ARM_ALU_PC_G2
9036 || r_type == R_ARM_ALU_SB_G0
9037 || r_type == R_ARM_ALU_SB_G1
9038 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
9040 (*_bfd_error_handler)
9041 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9042 input_bfd, input_section,
9043 (long) rel->r_offset, abs (signed_value), howto->name);
9044 return bfd_reloc_overflow;
9047 /* Mask out the value and the ADD/SUB part of the opcode; take care
9048 not to destroy the S bit. */
9051 /* Set the opcode according to whether the value to go in the
9052 place is negative. */
9053 if (signed_value < 0)
9058 /* Encode the offset. */
9061 bfd_put_32 (input_bfd, insn, hit_data);
9063 return bfd_reloc_ok;
9065 case R_ARM_LDR_PC_G0:
9066 case R_ARM_LDR_PC_G1:
9067 case R_ARM_LDR_PC_G2:
9068 case R_ARM_LDR_SB_G0:
9069 case R_ARM_LDR_SB_G1:
9070 case R_ARM_LDR_SB_G2:
9072 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
9073 bfd_vma pc = input_section->output_section->vma
9074 + input_section->output_offset + rel->r_offset;
9075 bfd_vma sb = 0; /* See note above. */
9077 bfd_signed_vma signed_value;
9080 /* Determine which groups of bits to calculate. */
9083 case R_ARM_LDR_PC_G0:
9084 case R_ARM_LDR_SB_G0:
9088 case R_ARM_LDR_PC_G1:
9089 case R_ARM_LDR_SB_G1:
9093 case R_ARM_LDR_PC_G2:
9094 case R_ARM_LDR_SB_G2:
9102 /* If REL, extract the addend from the insn. If RELA, it will
9103 have already been fetched for us. */
9104 if (globals->use_rel)
9106 int negative = (insn & (1 << 23)) ? 1 : -1;
9107 signed_addend = negative * (insn & 0xfff);
9110 /* Compute the value (X) to go in the place. */
9111 if (r_type == R_ARM_LDR_PC_G0
9112 || r_type == R_ARM_LDR_PC_G1
9113 || r_type == R_ARM_LDR_PC_G2)
9115 signed_value = value - pc + signed_addend;
9117 /* Section base relative. */
9118 signed_value = value - sb + signed_addend;
9120 /* Calculate the value of the relevant G_{n-1} to obtain
9121 the residual at that stage. */
9122 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
9124 /* Check for overflow. */
9125 if (residual >= 0x1000)
9127 (*_bfd_error_handler)
9128 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9129 input_bfd, input_section,
9130 (long) rel->r_offset, abs (signed_value), howto->name);
9131 return bfd_reloc_overflow;
9134 /* Mask out the value and U bit. */
9137 /* Set the U bit if the value to go in the place is non-negative. */
9138 if (signed_value >= 0)
9141 /* Encode the offset. */
9144 bfd_put_32 (input_bfd, insn, hit_data);
9146 return bfd_reloc_ok;
9148 case R_ARM_LDRS_PC_G0:
9149 case R_ARM_LDRS_PC_G1:
9150 case R_ARM_LDRS_PC_G2:
9151 case R_ARM_LDRS_SB_G0:
9152 case R_ARM_LDRS_SB_G1:
9153 case R_ARM_LDRS_SB_G2:
9155 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
9156 bfd_vma pc = input_section->output_section->vma
9157 + input_section->output_offset + rel->r_offset;
9158 bfd_vma sb = 0; /* See note above. */
9160 bfd_signed_vma signed_value;
9163 /* Determine which groups of bits to calculate. */
9166 case R_ARM_LDRS_PC_G0:
9167 case R_ARM_LDRS_SB_G0:
9171 case R_ARM_LDRS_PC_G1:
9172 case R_ARM_LDRS_SB_G1:
9176 case R_ARM_LDRS_PC_G2:
9177 case R_ARM_LDRS_SB_G2:
9185 /* If REL, extract the addend from the insn. If RELA, it will
9186 have already been fetched for us. */
9187 if (globals->use_rel)
9189 int negative = (insn & (1 << 23)) ? 1 : -1;
9190 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
9193 /* Compute the value (X) to go in the place. */
9194 if (r_type == R_ARM_LDRS_PC_G0
9195 || r_type == R_ARM_LDRS_PC_G1
9196 || r_type == R_ARM_LDRS_PC_G2)
9198 signed_value = value - pc + signed_addend;
9200 /* Section base relative. */
9201 signed_value = value - sb + signed_addend;
9203 /* Calculate the value of the relevant G_{n-1} to obtain
9204 the residual at that stage. */
9205 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
9207 /* Check for overflow. */
9208 if (residual >= 0x100)
9210 (*_bfd_error_handler)
9211 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9212 input_bfd, input_section,
9213 (long) rel->r_offset, abs (signed_value), howto->name);
9214 return bfd_reloc_overflow;
9217 /* Mask out the value and U bit. */
9220 /* Set the U bit if the value to go in the place is non-negative. */
9221 if (signed_value >= 0)
9224 /* Encode the offset. */
9225 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
9227 bfd_put_32 (input_bfd, insn, hit_data);
9229 return bfd_reloc_ok;
9231 case R_ARM_LDC_PC_G0:
9232 case R_ARM_LDC_PC_G1:
9233 case R_ARM_LDC_PC_G2:
9234 case R_ARM_LDC_SB_G0:
9235 case R_ARM_LDC_SB_G1:
9236 case R_ARM_LDC_SB_G2:
9238 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
9239 bfd_vma pc = input_section->output_section->vma
9240 + input_section->output_offset + rel->r_offset;
9241 bfd_vma sb = 0; /* See note above. */
9243 bfd_signed_vma signed_value;
9246 /* Determine which groups of bits to calculate. */
9249 case R_ARM_LDC_PC_G0:
9250 case R_ARM_LDC_SB_G0:
9254 case R_ARM_LDC_PC_G1:
9255 case R_ARM_LDC_SB_G1:
9259 case R_ARM_LDC_PC_G2:
9260 case R_ARM_LDC_SB_G2:
9268 /* If REL, extract the addend from the insn. If RELA, it will
9269 have already been fetched for us. */
9270 if (globals->use_rel)
9272 int negative = (insn & (1 << 23)) ? 1 : -1;
9273 signed_addend = negative * ((insn & 0xff) << 2);
9276 /* Compute the value (X) to go in the place. */
9277 if (r_type == R_ARM_LDC_PC_G0
9278 || r_type == R_ARM_LDC_PC_G1
9279 || r_type == R_ARM_LDC_PC_G2)
9281 signed_value = value - pc + signed_addend;
9283 /* Section base relative. */
9284 signed_value = value - sb + signed_addend;
9286 /* Calculate the value of the relevant G_{n-1} to obtain
9287 the residual at that stage. */
9288 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
9290 /* Check for overflow. (The absolute value to go in the place must be
9291 divisible by four and, after having been divided by four, must
9292 fit in eight bits.) */
9293 if ((residual & 0x3) != 0 || residual >= 0x400)
9295 (*_bfd_error_handler)
9296 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9297 input_bfd, input_section,
9298 (long) rel->r_offset, abs (signed_value), howto->name);
9299 return bfd_reloc_overflow;
9302 /* Mask out the value and U bit. */
9305 /* Set the U bit if the value to go in the place is non-negative. */
9306 if (signed_value >= 0)
9309 /* Encode the offset. */
9310 insn |= residual >> 2;
9312 bfd_put_32 (input_bfd, insn, hit_data);
9314 return bfd_reloc_ok;
9317 return bfd_reloc_notsupported;
9321 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
9323 arm_add_to_rel (bfd * abfd,
9325 reloc_howto_type * howto,
9326 bfd_signed_vma increment)
9328 bfd_signed_vma addend;
9330 if (howto->type == R_ARM_THM_CALL
9331 || howto->type == R_ARM_THM_JUMP24)
9333 int upper_insn, lower_insn;
9336 upper_insn = bfd_get_16 (abfd, address);
9337 lower_insn = bfd_get_16 (abfd, address + 2);
9338 upper = upper_insn & 0x7ff;
9339 lower = lower_insn & 0x7ff;
9341 addend = (upper << 12) | (lower << 1);
9342 addend += increment;
9345 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
9346 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
9348 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
9349 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9355 contents = bfd_get_32 (abfd, address);
9357 /* Get the (signed) value from the instruction. */
9358 addend = contents & howto->src_mask;
9359 if (addend & ((howto->src_mask + 1) >> 1))
9361 bfd_signed_vma mask;
9364 mask &= ~ howto->src_mask;
9368 /* Add in the increment, (which is a byte value). */
9369 switch (howto->type)
9372 addend += increment;
9379 addend <<= howto->size;
9380 addend += increment;
9382 /* Should we check for overflow here ? */
9384 /* Drop any undesired bits. */
9385 addend >>= howto->rightshift;
9389 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
9391 bfd_put_32 (abfd, contents, address);
9395 #define IS_ARM_TLS_RELOC(R_TYPE) \
9396 ((R_TYPE) == R_ARM_TLS_GD32 \
9397 || (R_TYPE) == R_ARM_TLS_LDO32 \
9398 || (R_TYPE) == R_ARM_TLS_LDM32 \
9399 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
9400 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
9401 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
9402 || (R_TYPE) == R_ARM_TLS_LE32 \
9403 || (R_TYPE) == R_ARM_TLS_IE32 \
9404 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
9406 /* Specific set of relocations for the gnu tls dialect. */
9407 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
9408 ((R_TYPE) == R_ARM_TLS_GOTDESC \
9409 || (R_TYPE) == R_ARM_TLS_CALL \
9410 || (R_TYPE) == R_ARM_THM_TLS_CALL \
9411 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
9412 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
9414 /* Relocate an ARM ELF section. */
9417 elf32_arm_relocate_section (bfd * output_bfd,
9418 struct bfd_link_info * info,
9420 asection * input_section,
9421 bfd_byte * contents,
9422 Elf_Internal_Rela * relocs,
9423 Elf_Internal_Sym * local_syms,
9424 asection ** local_sections)
9426 Elf_Internal_Shdr *symtab_hdr;
9427 struct elf_link_hash_entry **sym_hashes;
9428 Elf_Internal_Rela *rel;
9429 Elf_Internal_Rela *relend;
9431 struct elf32_arm_link_hash_table * globals;
9433 globals = elf32_arm_hash_table (info);
9434 if (globals == NULL)
9437 symtab_hdr = & elf_symtab_hdr (input_bfd);
9438 sym_hashes = elf_sym_hashes (input_bfd);
9441 relend = relocs + input_section->reloc_count;
9442 for (; rel < relend; rel++)
9445 reloc_howto_type * howto;
9446 unsigned long r_symndx;
9447 Elf_Internal_Sym * sym;
9449 struct elf_link_hash_entry * h;
9451 bfd_reloc_status_type r;
9454 bfd_boolean unresolved_reloc = FALSE;
9455 char *error_message = NULL;
9457 r_symndx = ELF32_R_SYM (rel->r_info);
9458 r_type = ELF32_R_TYPE (rel->r_info);
9459 r_type = arm_real_reloc_type (globals, r_type);
9461 if ( r_type == R_ARM_GNU_VTENTRY
9462 || r_type == R_ARM_GNU_VTINHERIT)
9465 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
9466 howto = bfd_reloc.howto;
9472 if (r_symndx < symtab_hdr->sh_info)
9474 sym = local_syms + r_symndx;
9475 sym_type = ELF32_ST_TYPE (sym->st_info);
9476 sec = local_sections[r_symndx];
9478 /* An object file might have a reference to a local
9479 undefined symbol. This is a daft object file, but we
9480 should at least do something about it. V4BX & NONE
9481 relocations do not use the symbol and are explicitly
9482 allowed to use the undefined symbol, so allow those.
9483 Likewise for relocations against STN_UNDEF. */
9484 if (r_type != R_ARM_V4BX
9485 && r_type != R_ARM_NONE
9486 && r_symndx != STN_UNDEF
9487 && bfd_is_und_section (sec)
9488 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
9490 if (!info->callbacks->undefined_symbol
9491 (info, bfd_elf_string_from_elf_section
9492 (input_bfd, symtab_hdr->sh_link, sym->st_name),
9493 input_bfd, input_section,
9494 rel->r_offset, TRUE))
9498 if (globals->use_rel)
9500 relocation = (sec->output_section->vma
9501 + sec->output_offset
9503 if (!info->relocatable
9504 && (sec->flags & SEC_MERGE)
9505 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9508 bfd_vma addend, value;
9512 case R_ARM_MOVW_ABS_NC:
9513 case R_ARM_MOVT_ABS:
9514 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
9515 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
9516 addend = (addend ^ 0x8000) - 0x8000;
9519 case R_ARM_THM_MOVW_ABS_NC:
9520 case R_ARM_THM_MOVT_ABS:
9521 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
9523 value |= bfd_get_16 (input_bfd,
9524 contents + rel->r_offset + 2);
9525 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
9526 | ((value & 0x04000000) >> 15);
9527 addend = (addend ^ 0x8000) - 0x8000;
9531 if (howto->rightshift
9532 || (howto->src_mask & (howto->src_mask + 1)))
9534 (*_bfd_error_handler)
9535 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
9536 input_bfd, input_section,
9537 (long) rel->r_offset, howto->name);
9541 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
9543 /* Get the (signed) value from the instruction. */
9544 addend = value & howto->src_mask;
9545 if (addend & ((howto->src_mask + 1) >> 1))
9547 bfd_signed_vma mask;
9550 mask &= ~ howto->src_mask;
9558 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
9560 addend += msec->output_section->vma + msec->output_offset;
9562 /* Cases here must match those in the preceeding
9563 switch statement. */
9566 case R_ARM_MOVW_ABS_NC:
9567 case R_ARM_MOVT_ABS:
9568 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
9570 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
9573 case R_ARM_THM_MOVW_ABS_NC:
9574 case R_ARM_THM_MOVT_ABS:
9575 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
9576 | (addend & 0xff) | ((addend & 0x0800) << 15);
9577 bfd_put_16 (input_bfd, value >> 16,
9578 contents + rel->r_offset);
9579 bfd_put_16 (input_bfd, value,
9580 contents + rel->r_offset + 2);
9584 value = (value & ~ howto->dst_mask)
9585 | (addend & howto->dst_mask);
9586 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
9592 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9598 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9599 r_symndx, symtab_hdr, sym_hashes,
9601 unresolved_reloc, warned);
9606 if (sec != NULL && elf_discarded_section (sec))
9607 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
9608 rel, relend, howto, contents);
9610 if (info->relocatable)
9612 /* This is a relocatable link. We don't have to change
9613 anything, unless the reloc is against a section symbol,
9614 in which case we have to adjust according to where the
9615 section symbol winds up in the output section. */
9616 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9618 if (globals->use_rel)
9619 arm_add_to_rel (input_bfd, contents + rel->r_offset,
9620 howto, (bfd_signed_vma) sec->output_offset);
9622 rel->r_addend += sec->output_offset;
9628 name = h->root.root.string;
9631 name = (bfd_elf_string_from_elf_section
9632 (input_bfd, symtab_hdr->sh_link, sym->st_name));
9633 if (name == NULL || *name == '\0')
9634 name = bfd_section_name (input_bfd, sec);
9637 if (r_symndx != STN_UNDEF
9638 && r_type != R_ARM_NONE
9640 || h->root.type == bfd_link_hash_defined
9641 || h->root.type == bfd_link_hash_defweak)
9642 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9644 (*_bfd_error_handler)
9645 ((sym_type == STT_TLS
9646 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9647 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
9650 (long) rel->r_offset,
9655 /* We call elf32_arm_final_link_relocate unless we're completely
9656 done, i.e., the relaxation produced the final output we want,
9657 and we won't let anybody mess with it. Also, we have to do
9658 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
9659 both in relaxed and non-relaxed cases */
9660 if ((elf32_arm_tls_transition (info, r_type, h) != (unsigned)r_type)
9661 || (IS_ARM_TLS_GNU_RELOC (r_type)
9662 && !((h ? elf32_arm_hash_entry (h)->tls_type :
9663 elf32_arm_local_got_tls_type (input_bfd)[r_symndx])
9666 r = elf32_arm_tls_relax (globals, input_bfd, input_section,
9667 contents, rel, h == NULL);
9668 /* This may have been marked unresolved because it came from
9669 a shared library. But we've just dealt with that. */
9670 unresolved_reloc = 0;
9673 r = bfd_reloc_continue;
9675 if (r == bfd_reloc_continue)
9676 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
9677 input_section, contents, rel,
9678 relocation, info, sec, name,
9679 (h ? ELF_ST_TYPE (h->type) :
9680 ELF_ST_TYPE (sym->st_info)), h,
9681 &unresolved_reloc, &error_message);
9683 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
9684 because such sections are not SEC_ALLOC and thus ld.so will
9685 not process them. */
9686 if (unresolved_reloc
9687 && !((input_section->flags & SEC_DEBUGGING) != 0
9690 (*_bfd_error_handler)
9691 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
9694 (long) rel->r_offset,
9696 h->root.root.string);
9700 if (r != bfd_reloc_ok)
9704 case bfd_reloc_overflow:
9705 /* If the overflowing reloc was to an undefined symbol,
9706 we have already printed one error message and there
9707 is no point complaining again. */
9709 h->root.type != bfd_link_hash_undefined)
9710 && (!((*info->callbacks->reloc_overflow)
9711 (info, (h ? &h->root : NULL), name, howto->name,
9712 (bfd_vma) 0, input_bfd, input_section,
9717 case bfd_reloc_undefined:
9718 if (!((*info->callbacks->undefined_symbol)
9719 (info, name, input_bfd, input_section,
9720 rel->r_offset, TRUE)))
9724 case bfd_reloc_outofrange:
9725 error_message = _("out of range");
9728 case bfd_reloc_notsupported:
9729 error_message = _("unsupported relocation");
9732 case bfd_reloc_dangerous:
9733 /* error_message should already be set. */
9737 error_message = _("unknown error");
9741 BFD_ASSERT (error_message != NULL);
9742 if (!((*info->callbacks->reloc_dangerous)
9743 (info, error_message, input_bfd, input_section,
9754 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
9755 adds the edit to the start of the list. (The list must be built in order of
9756 ascending TINDEX: the function's callers are primarily responsible for
9757 maintaining that condition). */
9760 add_unwind_table_edit (arm_unwind_table_edit **head,
9761 arm_unwind_table_edit **tail,
9762 arm_unwind_edit_type type,
9763 asection *linked_section,
9764 unsigned int tindex)
9766 arm_unwind_table_edit *new_edit = (arm_unwind_table_edit *)
9767 xmalloc (sizeof (arm_unwind_table_edit));
9769 new_edit->type = type;
9770 new_edit->linked_section = linked_section;
9771 new_edit->index = tindex;
9775 new_edit->next = NULL;
9778 (*tail)->next = new_edit;
9787 new_edit->next = *head;
9796 static _arm_elf_section_data *get_arm_elf_section_data (asection *);
9798 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
9800 adjust_exidx_size(asection *exidx_sec, int adjust)
9804 if (!exidx_sec->rawsize)
9805 exidx_sec->rawsize = exidx_sec->size;
9807 bfd_set_section_size (exidx_sec->owner, exidx_sec, exidx_sec->size + adjust);
9808 out_sec = exidx_sec->output_section;
9809 /* Adjust size of output section. */
9810 bfd_set_section_size (out_sec->owner, out_sec, out_sec->size +adjust);
9813 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
9815 insert_cantunwind_after(asection *text_sec, asection *exidx_sec)
9817 struct _arm_elf_section_data *exidx_arm_data;
9819 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
9820 add_unwind_table_edit (
9821 &exidx_arm_data->u.exidx.unwind_edit_list,
9822 &exidx_arm_data->u.exidx.unwind_edit_tail,
9823 INSERT_EXIDX_CANTUNWIND_AT_END, text_sec, UINT_MAX);
9825 adjust_exidx_size(exidx_sec, 8);
9828 /* Scan .ARM.exidx tables, and create a list describing edits which should be
9829 made to those tables, such that:
9831 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
9832 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
9833 codes which have been inlined into the index).
9835 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
9837 The edits are applied when the tables are written
9838 (in elf32_arm_write_section).
9842 elf32_arm_fix_exidx_coverage (asection **text_section_order,
9843 unsigned int num_text_sections,
9844 struct bfd_link_info *info,
9845 bfd_boolean merge_exidx_entries)
9848 unsigned int last_second_word = 0, i;
9849 asection *last_exidx_sec = NULL;
9850 asection *last_text_sec = NULL;
9851 int last_unwind_type = -1;
9853 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
9855 for (inp = info->input_bfds; inp != NULL; inp = inp->link_next)
9859 for (sec = inp->sections; sec != NULL; sec = sec->next)
9861 struct bfd_elf_section_data *elf_sec = elf_section_data (sec);
9862 Elf_Internal_Shdr *hdr = &elf_sec->this_hdr;
9864 if (!hdr || hdr->sh_type != SHT_ARM_EXIDX)
9867 if (elf_sec->linked_to)
9869 Elf_Internal_Shdr *linked_hdr
9870 = &elf_section_data (elf_sec->linked_to)->this_hdr;
9871 struct _arm_elf_section_data *linked_sec_arm_data
9872 = get_arm_elf_section_data (linked_hdr->bfd_section);
9874 if (linked_sec_arm_data == NULL)
9877 /* Link this .ARM.exidx section back from the text section it
9879 linked_sec_arm_data->u.text.arm_exidx_sec = sec;
9884 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
9885 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
9886 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
9888 for (i = 0; i < num_text_sections; i++)
9890 asection *sec = text_section_order[i];
9891 asection *exidx_sec;
9892 struct _arm_elf_section_data *arm_data = get_arm_elf_section_data (sec);
9893 struct _arm_elf_section_data *exidx_arm_data;
9894 bfd_byte *contents = NULL;
9895 int deleted_exidx_bytes = 0;
9897 arm_unwind_table_edit *unwind_edit_head = NULL;
9898 arm_unwind_table_edit *unwind_edit_tail = NULL;
9899 Elf_Internal_Shdr *hdr;
9902 if (arm_data == NULL)
9905 exidx_sec = arm_data->u.text.arm_exidx_sec;
9906 if (exidx_sec == NULL)
9908 /* Section has no unwind data. */
9909 if (last_unwind_type == 0 || !last_exidx_sec)
9912 /* Ignore zero sized sections. */
9916 insert_cantunwind_after(last_text_sec, last_exidx_sec);
9917 last_unwind_type = 0;
9921 /* Skip /DISCARD/ sections. */
9922 if (bfd_is_abs_section (exidx_sec->output_section))
9925 hdr = &elf_section_data (exidx_sec)->this_hdr;
9926 if (hdr->sh_type != SHT_ARM_EXIDX)
9929 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
9930 if (exidx_arm_data == NULL)
9933 ibfd = exidx_sec->owner;
9935 if (hdr->contents != NULL)
9936 contents = hdr->contents;
9937 else if (! bfd_malloc_and_get_section (ibfd, exidx_sec, &contents))
9941 for (j = 0; j < hdr->sh_size; j += 8)
9943 unsigned int second_word = bfd_get_32 (ibfd, contents + j + 4);
9947 /* An EXIDX_CANTUNWIND entry. */
9948 if (second_word == 1)
9950 if (last_unwind_type == 0)
9954 /* Inlined unwinding data. Merge if equal to previous. */
9955 else if ((second_word & 0x80000000) != 0)
9957 if (merge_exidx_entries
9958 && last_second_word == second_word && last_unwind_type == 1)
9961 last_second_word = second_word;
9963 /* Normal table entry. In theory we could merge these too,
9964 but duplicate entries are likely to be much less common. */
9970 add_unwind_table_edit (&unwind_edit_head, &unwind_edit_tail,
9971 DELETE_EXIDX_ENTRY, NULL, j / 8);
9973 deleted_exidx_bytes += 8;
9976 last_unwind_type = unwind_type;
9979 /* Free contents if we allocated it ourselves. */
9980 if (contents != hdr->contents)
9983 /* Record edits to be applied later (in elf32_arm_write_section). */
9984 exidx_arm_data->u.exidx.unwind_edit_list = unwind_edit_head;
9985 exidx_arm_data->u.exidx.unwind_edit_tail = unwind_edit_tail;
9987 if (deleted_exidx_bytes > 0)
9988 adjust_exidx_size(exidx_sec, -deleted_exidx_bytes);
9990 last_exidx_sec = exidx_sec;
9991 last_text_sec = sec;
9994 /* Add terminating CANTUNWIND entry. */
9995 if (last_exidx_sec && last_unwind_type != 0)
9996 insert_cantunwind_after(last_text_sec, last_exidx_sec);
10002 elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd,
10003 bfd *ibfd, const char *name)
10005 asection *sec, *osec;
10007 sec = bfd_get_section_by_name (ibfd, name);
10008 if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0)
10011 osec = sec->output_section;
10012 if (elf32_arm_write_section (obfd, info, sec, sec->contents))
10015 if (! bfd_set_section_contents (obfd, osec, sec->contents,
10016 sec->output_offset, sec->size))
10023 elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info)
10025 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
10026 asection *sec, *osec;
10028 if (globals == NULL)
10031 /* Invoke the regular ELF backend linker to do all the work. */
10032 if (!bfd_elf_final_link (abfd, info))
10035 /* Process stub sections (eg BE8 encoding, ...). */
10036 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
10038 for (i=0; i<htab->top_id; i++)
10040 sec = htab->stub_group[i].stub_sec;
10041 /* Only process it once, in its link_sec slot. */
10042 if (sec && i == htab->stub_group[i].link_sec->id)
10044 osec = sec->output_section;
10045 elf32_arm_write_section (abfd, info, sec, sec->contents);
10046 if (! bfd_set_section_contents (abfd, osec, sec->contents,
10047 sec->output_offset, sec->size))
10052 /* Write out any glue sections now that we have created all the
10054 if (globals->bfd_of_glue_owner != NULL)
10056 if (! elf32_arm_output_glue_section (info, abfd,
10057 globals->bfd_of_glue_owner,
10058 ARM2THUMB_GLUE_SECTION_NAME))
10061 if (! elf32_arm_output_glue_section (info, abfd,
10062 globals->bfd_of_glue_owner,
10063 THUMB2ARM_GLUE_SECTION_NAME))
10066 if (! elf32_arm_output_glue_section (info, abfd,
10067 globals->bfd_of_glue_owner,
10068 VFP11_ERRATUM_VENEER_SECTION_NAME))
10071 if (! elf32_arm_output_glue_section (info, abfd,
10072 globals->bfd_of_glue_owner,
10073 ARM_BX_GLUE_SECTION_NAME))
10080 /* Set the right machine number. */
10083 elf32_arm_object_p (bfd *abfd)
10087 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
10089 if (mach != bfd_mach_arm_unknown)
10090 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
10092 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
10093 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
10096 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
10101 /* Function to keep ARM specific flags in the ELF header. */
10104 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
10106 if (elf_flags_init (abfd)
10107 && elf_elfheader (abfd)->e_flags != flags)
10109 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
10111 if (flags & EF_ARM_INTERWORK)
10112 (*_bfd_error_handler)
10113 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
10117 (_("Warning: Clearing the interworking flag of %B due to outside request"),
10123 elf_elfheader (abfd)->e_flags = flags;
10124 elf_flags_init (abfd) = TRUE;
10130 /* Copy backend specific data from one object module to another. */
10133 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
10136 flagword out_flags;
10138 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
10141 in_flags = elf_elfheader (ibfd)->e_flags;
10142 out_flags = elf_elfheader (obfd)->e_flags;
10144 if (elf_flags_init (obfd)
10145 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
10146 && in_flags != out_flags)
10148 /* Cannot mix APCS26 and APCS32 code. */
10149 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
10152 /* Cannot mix float APCS and non-float APCS code. */
10153 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
10156 /* If the src and dest have different interworking flags
10157 then turn off the interworking bit. */
10158 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
10160 if (out_flags & EF_ARM_INTERWORK)
10162 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
10165 in_flags &= ~EF_ARM_INTERWORK;
10168 /* Likewise for PIC, though don't warn for this case. */
10169 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
10170 in_flags &= ~EF_ARM_PIC;
10173 elf_elfheader (obfd)->e_flags = in_flags;
10174 elf_flags_init (obfd) = TRUE;
10176 /* Also copy the EI_OSABI field. */
10177 elf_elfheader (obfd)->e_ident[EI_OSABI] =
10178 elf_elfheader (ibfd)->e_ident[EI_OSABI];
10180 /* Copy object attributes. */
10181 _bfd_elf_copy_obj_attributes (ibfd, obfd);
10186 /* Values for Tag_ABI_PCS_R9_use. */
10195 /* Values for Tag_ABI_PCS_RW_data. */
10198 AEABI_PCS_RW_data_absolute,
10199 AEABI_PCS_RW_data_PCrel,
10200 AEABI_PCS_RW_data_SBrel,
10201 AEABI_PCS_RW_data_unused
10204 /* Values for Tag_ABI_enum_size. */
10210 AEABI_enum_forced_wide
10213 /* Determine whether an object attribute tag takes an integer, a
10217 elf32_arm_obj_attrs_arg_type (int tag)
10219 if (tag == Tag_compatibility)
10220 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
10221 else if (tag == Tag_nodefaults)
10222 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT;
10223 else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name)
10224 return ATTR_TYPE_FLAG_STR_VAL;
10226 return ATTR_TYPE_FLAG_INT_VAL;
10228 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
10231 /* The ABI defines that Tag_conformance should be emitted first, and that
10232 Tag_nodefaults should be second (if either is defined). This sets those
10233 two positions, and bumps up the position of all the remaining tags to
10236 elf32_arm_obj_attrs_order (int num)
10238 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE)
10239 return Tag_conformance;
10240 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE + 1)
10241 return Tag_nodefaults;
10242 if ((num - 2) < Tag_nodefaults)
10244 if ((num - 1) < Tag_conformance)
10249 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
10251 elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag)
10253 if ((tag & 127) < 64)
10256 (_("%B: Unknown mandatory EABI object attribute %d"),
10258 bfd_set_error (bfd_error_bad_value);
10264 (_("Warning: %B: Unknown EABI object attribute %d"),
10270 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
10271 Returns -1 if no architecture could be read. */
10274 get_secondary_compatible_arch (bfd *abfd)
10276 obj_attribute *attr =
10277 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
10279 /* Note: the tag and its argument below are uleb128 values, though
10280 currently-defined values fit in one byte for each. */
10282 && attr->s[0] == Tag_CPU_arch
10283 && (attr->s[1] & 128) != 128
10284 && attr->s[2] == 0)
10287 /* This tag is "safely ignorable", so don't complain if it looks funny. */
10291 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
10292 The tag is removed if ARCH is -1. */
10295 set_secondary_compatible_arch (bfd *abfd, int arch)
10297 obj_attribute *attr =
10298 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
10306 /* Note: the tag and its argument below are uleb128 values, though
10307 currently-defined values fit in one byte for each. */
10309 attr->s = (char *) bfd_alloc (abfd, 3);
10310 attr->s[0] = Tag_CPU_arch;
10315 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
10319 tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out,
10320 int newtag, int secondary_compat)
10322 #define T(X) TAG_CPU_ARCH_##X
10323 int tagl, tagh, result;
10326 T(V6T2), /* PRE_V4. */
10328 T(V6T2), /* V4T. */
10329 T(V6T2), /* V5T. */
10330 T(V6T2), /* V5TE. */
10331 T(V6T2), /* V5TEJ. */
10334 T(V6T2) /* V6T2. */
10338 T(V6K), /* PRE_V4. */
10342 T(V6K), /* V5TE. */
10343 T(V6K), /* V5TEJ. */
10345 T(V6KZ), /* V6KZ. */
10351 T(V7), /* PRE_V4. */
10356 T(V7), /* V5TEJ. */
10369 T(V6K), /* V5TE. */
10370 T(V6K), /* V5TEJ. */
10372 T(V6KZ), /* V6KZ. */
10376 T(V6_M) /* V6_M. */
10378 const int v6s_m[] =
10384 T(V6K), /* V5TE. */
10385 T(V6K), /* V5TEJ. */
10387 T(V6KZ), /* V6KZ. */
10391 T(V6S_M), /* V6_M. */
10392 T(V6S_M) /* V6S_M. */
10394 const int v7e_m[] =
10398 T(V7E_M), /* V4T. */
10399 T(V7E_M), /* V5T. */
10400 T(V7E_M), /* V5TE. */
10401 T(V7E_M), /* V5TEJ. */
10402 T(V7E_M), /* V6. */
10403 T(V7E_M), /* V6KZ. */
10404 T(V7E_M), /* V6T2. */
10405 T(V7E_M), /* V6K. */
10406 T(V7E_M), /* V7. */
10407 T(V7E_M), /* V6_M. */
10408 T(V7E_M), /* V6S_M. */
10409 T(V7E_M) /* V7E_M. */
10411 const int v4t_plus_v6_m[] =
10417 T(V5TE), /* V5TE. */
10418 T(V5TEJ), /* V5TEJ. */
10420 T(V6KZ), /* V6KZ. */
10421 T(V6T2), /* V6T2. */
10424 T(V6_M), /* V6_M. */
10425 T(V6S_M), /* V6S_M. */
10426 T(V7E_M), /* V7E_M. */
10427 T(V4T_PLUS_V6_M) /* V4T plus V6_M. */
10429 const int *comb[] =
10437 /* Pseudo-architecture. */
10441 /* Check we've not got a higher architecture than we know about. */
10443 if (oldtag > MAX_TAG_CPU_ARCH || newtag > MAX_TAG_CPU_ARCH)
10445 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd);
10449 /* Override old tag if we have a Tag_also_compatible_with on the output. */
10451 if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T))
10452 || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M)))
10453 oldtag = T(V4T_PLUS_V6_M);
10455 /* And override the new tag if we have a Tag_also_compatible_with on the
10458 if ((newtag == T(V6_M) && secondary_compat == T(V4T))
10459 || (newtag == T(V4T) && secondary_compat == T(V6_M)))
10460 newtag = T(V4T_PLUS_V6_M);
10462 tagl = (oldtag < newtag) ? oldtag : newtag;
10463 result = tagh = (oldtag > newtag) ? oldtag : newtag;
10465 /* Architectures before V6KZ add features monotonically. */
10466 if (tagh <= TAG_CPU_ARCH_V6KZ)
10469 result = comb[tagh - T(V6T2)][tagl];
10471 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
10472 as the canonical version. */
10473 if (result == T(V4T_PLUS_V6_M))
10476 *secondary_compat_out = T(V6_M);
10479 *secondary_compat_out = -1;
10483 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
10484 ibfd, oldtag, newtag);
10492 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
10493 are conflicting attributes. */
10496 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
10498 obj_attribute *in_attr;
10499 obj_attribute *out_attr;
10500 /* Some tags have 0 = don't care, 1 = strong requirement,
10501 2 = weak requirement. */
10502 static const int order_021[3] = {0, 2, 1};
10504 bfd_boolean result = TRUE;
10506 /* Skip the linker stubs file. This preserves previous behavior
10507 of accepting unknown attributes in the first input file - but
10509 if (ibfd->flags & BFD_LINKER_CREATED)
10512 if (!elf_known_obj_attributes_proc (obfd)[0].i)
10514 /* This is the first object. Copy the attributes. */
10515 _bfd_elf_copy_obj_attributes (ibfd, obfd);
10517 out_attr = elf_known_obj_attributes_proc (obfd);
10519 /* Use the Tag_null value to indicate the attributes have been
10523 /* We do not output objects with Tag_MPextension_use_legacy - we move
10524 the attribute's value to Tag_MPextension_use. */
10525 if (out_attr[Tag_MPextension_use_legacy].i != 0)
10527 if (out_attr[Tag_MPextension_use].i != 0
10528 && out_attr[Tag_MPextension_use_legacy].i
10529 != out_attr[Tag_MPextension_use].i)
10532 (_("Error: %B has both the current and legacy "
10533 "Tag_MPextension_use attributes"), ibfd);
10537 out_attr[Tag_MPextension_use] =
10538 out_attr[Tag_MPextension_use_legacy];
10539 out_attr[Tag_MPextension_use_legacy].type = 0;
10540 out_attr[Tag_MPextension_use_legacy].i = 0;
10546 in_attr = elf_known_obj_attributes_proc (ibfd);
10547 out_attr = elf_known_obj_attributes_proc (obfd);
10548 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
10549 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
10551 /* Ignore mismatches if the object doesn't use floating point. */
10552 if (out_attr[Tag_ABI_FP_number_model].i == 0)
10553 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
10554 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
10557 (_("error: %B uses VFP register arguments, %B does not"),
10558 in_attr[Tag_ABI_VFP_args].i ? ibfd : obfd,
10559 in_attr[Tag_ABI_VFP_args].i ? obfd : ibfd);
10564 for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
10566 /* Merge this attribute with existing attributes. */
10569 case Tag_CPU_raw_name:
10571 /* These are merged after Tag_CPU_arch. */
10574 case Tag_ABI_optimization_goals:
10575 case Tag_ABI_FP_optimization_goals:
10576 /* Use the first value seen. */
10581 int secondary_compat = -1, secondary_compat_out = -1;
10582 unsigned int saved_out_attr = out_attr[i].i;
10583 static const char *name_table[] = {
10584 /* These aren't real CPU names, but we can't guess
10585 that from the architecture version alone. */
10601 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
10602 secondary_compat = get_secondary_compatible_arch (ibfd);
10603 secondary_compat_out = get_secondary_compatible_arch (obfd);
10604 out_attr[i].i = tag_cpu_arch_combine (ibfd, out_attr[i].i,
10605 &secondary_compat_out,
10608 set_secondary_compatible_arch (obfd, secondary_compat_out);
10610 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
10611 if (out_attr[i].i == saved_out_attr)
10612 ; /* Leave the names alone. */
10613 else if (out_attr[i].i == in_attr[i].i)
10615 /* The output architecture has been changed to match the
10616 input architecture. Use the input names. */
10617 out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s
10618 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s)
10620 out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s
10621 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s)
10626 out_attr[Tag_CPU_name].s = NULL;
10627 out_attr[Tag_CPU_raw_name].s = NULL;
10630 /* If we still don't have a value for Tag_CPU_name,
10631 make one up now. Tag_CPU_raw_name remains blank. */
10632 if (out_attr[Tag_CPU_name].s == NULL
10633 && out_attr[i].i < ARRAY_SIZE (name_table))
10634 out_attr[Tag_CPU_name].s =
10635 _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]);
10639 case Tag_ARM_ISA_use:
10640 case Tag_THUMB_ISA_use:
10641 case Tag_WMMX_arch:
10642 case Tag_Advanced_SIMD_arch:
10643 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
10644 case Tag_ABI_FP_rounding:
10645 case Tag_ABI_FP_exceptions:
10646 case Tag_ABI_FP_user_exceptions:
10647 case Tag_ABI_FP_number_model:
10648 case Tag_FP_HP_extension:
10649 case Tag_CPU_unaligned_access:
10651 case Tag_MPextension_use:
10652 /* Use the largest value specified. */
10653 if (in_attr[i].i > out_attr[i].i)
10654 out_attr[i].i = in_attr[i].i;
10657 case Tag_ABI_align_preserved:
10658 case Tag_ABI_PCS_RO_data:
10659 /* Use the smallest value specified. */
10660 if (in_attr[i].i < out_attr[i].i)
10661 out_attr[i].i = in_attr[i].i;
10664 case Tag_ABI_align_needed:
10665 if ((in_attr[i].i > 0 || out_attr[i].i > 0)
10666 && (in_attr[Tag_ABI_align_preserved].i == 0
10667 || out_attr[Tag_ABI_align_preserved].i == 0))
10669 /* This error message should be enabled once all non-conformant
10670 binaries in the toolchain have had the attributes set
10673 (_("error: %B: 8-byte data alignment conflicts with %B"),
10677 /* Fall through. */
10678 case Tag_ABI_FP_denormal:
10679 case Tag_ABI_PCS_GOT_use:
10680 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
10681 value if greater than 2 (for future-proofing). */
10682 if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i)
10683 || (in_attr[i].i <= 2 && out_attr[i].i <= 2
10684 && order_021[in_attr[i].i] > order_021[out_attr[i].i]))
10685 out_attr[i].i = in_attr[i].i;
10688 case Tag_Virtualization_use:
10689 /* The virtualization tag effectively stores two bits of
10690 information: the intended use of TrustZone (in bit 0), and the
10691 intended use of Virtualization (in bit 1). */
10692 if (out_attr[i].i == 0)
10693 out_attr[i].i = in_attr[i].i;
10694 else if (in_attr[i].i != 0
10695 && in_attr[i].i != out_attr[i].i)
10697 if (in_attr[i].i <= 3 && out_attr[i].i <= 3)
10702 (_("error: %B: unable to merge virtualization attributes "
10710 case Tag_CPU_arch_profile:
10711 if (out_attr[i].i != in_attr[i].i)
10713 /* 0 will merge with anything.
10714 'A' and 'S' merge to 'A'.
10715 'R' and 'S' merge to 'R'.
10716 'M' and 'A|R|S' is an error. */
10717 if (out_attr[i].i == 0
10718 || (out_attr[i].i == 'S'
10719 && (in_attr[i].i == 'A' || in_attr[i].i == 'R')))
10720 out_attr[i].i = in_attr[i].i;
10721 else if (in_attr[i].i == 0
10722 || (in_attr[i].i == 'S'
10723 && (out_attr[i].i == 'A' || out_attr[i].i == 'R')))
10724 ; /* Do nothing. */
10728 (_("error: %B: Conflicting architecture profiles %c/%c"),
10730 in_attr[i].i ? in_attr[i].i : '0',
10731 out_attr[i].i ? out_attr[i].i : '0');
10738 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
10739 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
10740 when it's 0. It might mean absence of FP hardware if
10741 Tag_FP_arch is zero, otherwise it is effectively SP + DP. */
10743 static const struct
10747 } vfp_versions[7] =
10761 /* If the output has no requirement about FP hardware,
10762 follow the requirement of the input. */
10763 if (out_attr[i].i == 0)
10765 BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0);
10766 out_attr[i].i = in_attr[i].i;
10767 out_attr[Tag_ABI_HardFP_use].i
10768 = in_attr[Tag_ABI_HardFP_use].i;
10771 /* If the input has no requirement about FP hardware, do
10773 else if (in_attr[i].i == 0)
10775 BFD_ASSERT (in_attr[Tag_ABI_HardFP_use].i == 0);
10779 /* Both the input and the output have nonzero Tag_FP_arch.
10780 So Tag_ABI_HardFP_use is (SP & DP) when it's zero. */
10782 /* If both the input and the output have zero Tag_ABI_HardFP_use,
10784 if (in_attr[Tag_ABI_HardFP_use].i == 0
10785 && out_attr[Tag_ABI_HardFP_use].i == 0)
10787 /* If the input and the output have different Tag_ABI_HardFP_use,
10788 the combination of them is 3 (SP & DP). */
10789 else if (in_attr[Tag_ABI_HardFP_use].i
10790 != out_attr[Tag_ABI_HardFP_use].i)
10791 out_attr[Tag_ABI_HardFP_use].i = 3;
10793 /* Now we can handle Tag_FP_arch. */
10795 /* Values greater than 6 aren't defined, so just pick the
10797 if (in_attr[i].i > 6 && in_attr[i].i > out_attr[i].i)
10799 out_attr[i] = in_attr[i];
10802 /* The output uses the superset of input features
10803 (ISA version) and registers. */
10804 ver = vfp_versions[in_attr[i].i].ver;
10805 if (ver < vfp_versions[out_attr[i].i].ver)
10806 ver = vfp_versions[out_attr[i].i].ver;
10807 regs = vfp_versions[in_attr[i].i].regs;
10808 if (regs < vfp_versions[out_attr[i].i].regs)
10809 regs = vfp_versions[out_attr[i].i].regs;
10810 /* This assumes all possible supersets are also a valid
10812 for (newval = 6; newval > 0; newval--)
10814 if (regs == vfp_versions[newval].regs
10815 && ver == vfp_versions[newval].ver)
10818 out_attr[i].i = newval;
10821 case Tag_PCS_config:
10822 if (out_attr[i].i == 0)
10823 out_attr[i].i = in_attr[i].i;
10824 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
10826 /* It's sometimes ok to mix different configs, so this is only
10829 (_("Warning: %B: Conflicting platform configuration"), ibfd);
10832 case Tag_ABI_PCS_R9_use:
10833 if (in_attr[i].i != out_attr[i].i
10834 && out_attr[i].i != AEABI_R9_unused
10835 && in_attr[i].i != AEABI_R9_unused)
10838 (_("error: %B: Conflicting use of R9"), ibfd);
10841 if (out_attr[i].i == AEABI_R9_unused)
10842 out_attr[i].i = in_attr[i].i;
10844 case Tag_ABI_PCS_RW_data:
10845 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
10846 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
10847 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
10850 (_("error: %B: SB relative addressing conflicts with use of R9"),
10854 /* Use the smallest value specified. */
10855 if (in_attr[i].i < out_attr[i].i)
10856 out_attr[i].i = in_attr[i].i;
10858 case Tag_ABI_PCS_wchar_t:
10859 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
10860 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
10863 (_("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"),
10864 ibfd, in_attr[i].i, out_attr[i].i);
10866 else if (in_attr[i].i && !out_attr[i].i)
10867 out_attr[i].i = in_attr[i].i;
10869 case Tag_ABI_enum_size:
10870 if (in_attr[i].i != AEABI_enum_unused)
10872 if (out_attr[i].i == AEABI_enum_unused
10873 || out_attr[i].i == AEABI_enum_forced_wide)
10875 /* The existing object is compatible with anything.
10876 Use whatever requirements the new object has. */
10877 out_attr[i].i = in_attr[i].i;
10879 else if (in_attr[i].i != AEABI_enum_forced_wide
10880 && out_attr[i].i != in_attr[i].i
10881 && !elf_arm_tdata (obfd)->no_enum_size_warning)
10883 static const char *aeabi_enum_names[] =
10884 { "", "variable-size", "32-bit", "" };
10885 const char *in_name =
10886 in_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
10887 ? aeabi_enum_names[in_attr[i].i]
10889 const char *out_name =
10890 out_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
10891 ? aeabi_enum_names[out_attr[i].i]
10894 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
10895 ibfd, in_name, out_name);
10899 case Tag_ABI_VFP_args:
10902 case Tag_ABI_WMMX_args:
10903 if (in_attr[i].i != out_attr[i].i)
10906 (_("error: %B uses iWMMXt register arguments, %B does not"),
10911 case Tag_compatibility:
10912 /* Merged in target-independent code. */
10914 case Tag_ABI_HardFP_use:
10915 /* This is handled along with Tag_FP_arch. */
10917 case Tag_ABI_FP_16bit_format:
10918 if (in_attr[i].i != 0 && out_attr[i].i != 0)
10920 if (in_attr[i].i != out_attr[i].i)
10923 (_("error: fp16 format mismatch between %B and %B"),
10928 if (in_attr[i].i != 0)
10929 out_attr[i].i = in_attr[i].i;
10933 /* This tag is set to zero if we can use UDIV and SDIV in Thumb
10934 mode on a v7-M or v7-R CPU; to one if we can not use UDIV or
10935 SDIV at all; and to two if we can use UDIV or SDIV on a v7-A
10936 CPU. We will merge as follows: If the input attribute's value
10937 is one then the output attribute's value remains unchanged. If
10938 the input attribute's value is zero or two then if the output
10939 attribute's value is one the output value is set to the input
10940 value, otherwise the output value must be the same as the
10942 if (in_attr[i].i != 1 && out_attr[i].i != 1)
10944 if (in_attr[i].i != out_attr[i].i)
10947 (_("DIV usage mismatch between %B and %B"),
10953 if (in_attr[i].i != 1)
10954 out_attr[i].i = in_attr[i].i;
10958 case Tag_MPextension_use_legacy:
10959 /* We don't output objects with Tag_MPextension_use_legacy - we
10960 move the value to Tag_MPextension_use. */
10961 if (in_attr[i].i != 0 && in_attr[Tag_MPextension_use].i != 0)
10963 if (in_attr[Tag_MPextension_use].i != in_attr[i].i)
10966 (_("%B has has both the current and legacy "
10967 "Tag_MPextension_use attributes"),
10973 if (in_attr[i].i > out_attr[Tag_MPextension_use].i)
10974 out_attr[Tag_MPextension_use] = in_attr[i];
10978 case Tag_nodefaults:
10979 /* This tag is set if it exists, but the value is unused (and is
10980 typically zero). We don't actually need to do anything here -
10981 the merge happens automatically when the type flags are merged
10984 case Tag_also_compatible_with:
10985 /* Already done in Tag_CPU_arch. */
10987 case Tag_conformance:
10988 /* Keep the attribute if it matches. Throw it away otherwise.
10989 No attribute means no claim to conform. */
10990 if (!in_attr[i].s || !out_attr[i].s
10991 || strcmp (in_attr[i].s, out_attr[i].s) != 0)
10992 out_attr[i].s = NULL;
10997 = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
11000 /* If out_attr was copied from in_attr then it won't have a type yet. */
11001 if (in_attr[i].type && !out_attr[i].type)
11002 out_attr[i].type = in_attr[i].type;
11005 /* Merge Tag_compatibility attributes and any common GNU ones. */
11006 if (!_bfd_elf_merge_object_attributes (ibfd, obfd))
11009 /* Check for any attributes not known on ARM. */
11010 result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
11016 /* Return TRUE if the two EABI versions are incompatible. */
11019 elf32_arm_versions_compatible (unsigned iver, unsigned over)
11021 /* v4 and v5 are the same spec before and after it was released,
11022 so allow mixing them. */
11023 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
11024 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
11027 return (iver == over);
11030 /* Merge backend specific data from an object file to the output
11031 object file when linking. */
11034 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd);
11036 /* Display the flags field. */
11039 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
11041 FILE * file = (FILE *) ptr;
11042 unsigned long flags;
11044 BFD_ASSERT (abfd != NULL && ptr != NULL);
11046 /* Print normal ELF private data. */
11047 _bfd_elf_print_private_bfd_data (abfd, ptr);
11049 flags = elf_elfheader (abfd)->e_flags;
11050 /* Ignore init flag - it may not be set, despite the flags field
11051 containing valid data. */
11053 /* xgettext:c-format */
11054 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
11056 switch (EF_ARM_EABI_VERSION (flags))
11058 case EF_ARM_EABI_UNKNOWN:
11059 /* The following flag bits are GNU extensions and not part of the
11060 official ARM ELF extended ABI. Hence they are only decoded if
11061 the EABI version is not set. */
11062 if (flags & EF_ARM_INTERWORK)
11063 fprintf (file, _(" [interworking enabled]"));
11065 if (flags & EF_ARM_APCS_26)
11066 fprintf (file, " [APCS-26]");
11068 fprintf (file, " [APCS-32]");
11070 if (flags & EF_ARM_VFP_FLOAT)
11071 fprintf (file, _(" [VFP float format]"));
11072 else if (flags & EF_ARM_MAVERICK_FLOAT)
11073 fprintf (file, _(" [Maverick float format]"));
11075 fprintf (file, _(" [FPA float format]"));
11077 if (flags & EF_ARM_APCS_FLOAT)
11078 fprintf (file, _(" [floats passed in float registers]"));
11080 if (flags & EF_ARM_PIC)
11081 fprintf (file, _(" [position independent]"));
11083 if (flags & EF_ARM_NEW_ABI)
11084 fprintf (file, _(" [new ABI]"));
11086 if (flags & EF_ARM_OLD_ABI)
11087 fprintf (file, _(" [old ABI]"));
11089 if (flags & EF_ARM_SOFT_FLOAT)
11090 fprintf (file, _(" [software FP]"));
11092 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
11093 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
11094 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
11095 | EF_ARM_MAVERICK_FLOAT);
11098 case EF_ARM_EABI_VER1:
11099 fprintf (file, _(" [Version1 EABI]"));
11101 if (flags & EF_ARM_SYMSARESORTED)
11102 fprintf (file, _(" [sorted symbol table]"));
11104 fprintf (file, _(" [unsorted symbol table]"));
11106 flags &= ~ EF_ARM_SYMSARESORTED;
11109 case EF_ARM_EABI_VER2:
11110 fprintf (file, _(" [Version2 EABI]"));
11112 if (flags & EF_ARM_SYMSARESORTED)
11113 fprintf (file, _(" [sorted symbol table]"));
11115 fprintf (file, _(" [unsorted symbol table]"));
11117 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
11118 fprintf (file, _(" [dynamic symbols use segment index]"));
11120 if (flags & EF_ARM_MAPSYMSFIRST)
11121 fprintf (file, _(" [mapping symbols precede others]"));
11123 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
11124 | EF_ARM_MAPSYMSFIRST);
11127 case EF_ARM_EABI_VER3:
11128 fprintf (file, _(" [Version3 EABI]"));
11131 case EF_ARM_EABI_VER4:
11132 fprintf (file, _(" [Version4 EABI]"));
11135 case EF_ARM_EABI_VER5:
11136 fprintf (file, _(" [Version5 EABI]"));
11138 if (flags & EF_ARM_BE8)
11139 fprintf (file, _(" [BE8]"));
11141 if (flags & EF_ARM_LE8)
11142 fprintf (file, _(" [LE8]"));
11144 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
11148 fprintf (file, _(" <EABI version unrecognised>"));
11152 flags &= ~ EF_ARM_EABIMASK;
11154 if (flags & EF_ARM_RELEXEC)
11155 fprintf (file, _(" [relocatable executable]"));
11157 if (flags & EF_ARM_HASENTRY)
11158 fprintf (file, _(" [has entry point]"));
11160 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
11163 fprintf (file, _("<Unrecognised flag bits set>"));
11165 fputc ('\n', file);
11171 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
11173 switch (ELF_ST_TYPE (elf_sym->st_info))
11175 case STT_ARM_TFUNC:
11176 return ELF_ST_TYPE (elf_sym->st_info);
11178 case STT_ARM_16BIT:
11179 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
11180 This allows us to distinguish between data used by Thumb instructions
11181 and non-data (which is probably code) inside Thumb regions of an
11183 if (type != STT_OBJECT && type != STT_TLS)
11184 return ELF_ST_TYPE (elf_sym->st_info);
11195 elf32_arm_gc_mark_hook (asection *sec,
11196 struct bfd_link_info *info,
11197 Elf_Internal_Rela *rel,
11198 struct elf_link_hash_entry *h,
11199 Elf_Internal_Sym *sym)
11202 switch (ELF32_R_TYPE (rel->r_info))
11204 case R_ARM_GNU_VTINHERIT:
11205 case R_ARM_GNU_VTENTRY:
11209 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
11212 /* Update the got entry reference counts for the section being removed. */
11215 elf32_arm_gc_sweep_hook (bfd * abfd,
11216 struct bfd_link_info * info,
11218 const Elf_Internal_Rela * relocs)
11220 Elf_Internal_Shdr *symtab_hdr;
11221 struct elf_link_hash_entry **sym_hashes;
11222 bfd_signed_vma *local_got_refcounts;
11223 const Elf_Internal_Rela *rel, *relend;
11224 struct elf32_arm_link_hash_table * globals;
11226 if (info->relocatable)
11229 globals = elf32_arm_hash_table (info);
11230 if (globals == NULL)
11233 elf_section_data (sec)->local_dynrel = NULL;
11235 symtab_hdr = & elf_symtab_hdr (abfd);
11236 sym_hashes = elf_sym_hashes (abfd);
11237 local_got_refcounts = elf_local_got_refcounts (abfd);
11239 check_use_blx (globals);
11241 relend = relocs + sec->reloc_count;
11242 for (rel = relocs; rel < relend; rel++)
11244 unsigned long r_symndx;
11245 struct elf_link_hash_entry *h = NULL;
11246 struct elf32_arm_link_hash_entry *eh;
11248 bfd_boolean may_become_dynamic_p;
11249 bfd_boolean may_need_local_target_p;
11251 r_symndx = ELF32_R_SYM (rel->r_info);
11252 if (r_symndx >= symtab_hdr->sh_info)
11254 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
11255 while (h->root.type == bfd_link_hash_indirect
11256 || h->root.type == bfd_link_hash_warning)
11257 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11259 eh = (struct elf32_arm_link_hash_entry *) h;
11261 may_become_dynamic_p = FALSE;
11262 may_need_local_target_p = FALSE;
11264 r_type = ELF32_R_TYPE (rel->r_info);
11265 r_type = arm_real_reloc_type (globals, r_type);
11269 case R_ARM_GOT_PREL:
11270 case R_ARM_TLS_GD32:
11271 case R_ARM_TLS_IE32:
11274 if (h->got.refcount > 0)
11275 h->got.refcount -= 1;
11277 else if (local_got_refcounts != NULL)
11279 if (local_got_refcounts[r_symndx] > 0)
11280 local_got_refcounts[r_symndx] -= 1;
11284 case R_ARM_TLS_LDM32:
11285 globals->tls_ldm_got.refcount -= 1;
11293 case R_ARM_THM_CALL:
11294 case R_ARM_THM_JUMP24:
11295 case R_ARM_THM_JUMP19:
11296 may_need_local_target_p = TRUE;
11300 if (!globals->vxworks_p)
11302 may_need_local_target_p = TRUE;
11305 /* Fall through. */
11307 case R_ARM_ABS32_NOI:
11309 case R_ARM_REL32_NOI:
11310 case R_ARM_MOVW_ABS_NC:
11311 case R_ARM_MOVT_ABS:
11312 case R_ARM_MOVW_PREL_NC:
11313 case R_ARM_MOVT_PREL:
11314 case R_ARM_THM_MOVW_ABS_NC:
11315 case R_ARM_THM_MOVT_ABS:
11316 case R_ARM_THM_MOVW_PREL_NC:
11317 case R_ARM_THM_MOVT_PREL:
11318 /* Should the interworking branches be here also? */
11319 if ((info->shared || globals->root.is_relocatable_executable)
11320 && (sec->flags & SEC_ALLOC) != 0
11322 || (r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)))
11323 may_become_dynamic_p = TRUE;
11325 may_need_local_target_p = TRUE;
11332 if (may_need_local_target_p && h != NULL)
11334 BFD_ASSERT (h->plt.refcount > 0);
11335 h->plt.refcount -= 1;
11337 if (r_type == R_ARM_THM_CALL)
11338 eh->plt_maybe_thumb_refcount--;
11340 if (r_type == R_ARM_THM_JUMP24
11341 || r_type == R_ARM_THM_JUMP19)
11342 eh->plt_thumb_refcount--;
11345 if (may_become_dynamic_p && h != NULL)
11347 struct elf_dyn_relocs **pp;
11348 struct elf_dyn_relocs *p;
11350 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
11353 /* Everything must go for SEC. */
11363 /* Look through the relocs for a section during the first phase. */
11366 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
11367 asection *sec, const Elf_Internal_Rela *relocs)
11369 Elf_Internal_Shdr *symtab_hdr;
11370 struct elf_link_hash_entry **sym_hashes;
11371 const Elf_Internal_Rela *rel;
11372 const Elf_Internal_Rela *rel_end;
11375 struct elf32_arm_link_hash_table *htab;
11376 bfd_boolean call_reloc_p;
11377 bfd_boolean may_become_dynamic_p;
11378 bfd_boolean may_need_local_target_p;
11379 unsigned long nsyms;
11381 if (info->relocatable)
11384 BFD_ASSERT (is_arm_elf (abfd));
11386 htab = elf32_arm_hash_table (info);
11392 /* Create dynamic sections for relocatable executables so that we can
11393 copy relocations. */
11394 if (htab->root.is_relocatable_executable
11395 && ! htab->root.dynamic_sections_created)
11397 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
11401 if (htab->root.dynobj == NULL)
11402 htab->root.dynobj = abfd;
11404 dynobj = htab->root.dynobj;
11406 symtab_hdr = & elf_symtab_hdr (abfd);
11407 sym_hashes = elf_sym_hashes (abfd);
11408 nsyms = NUM_SHDR_ENTRIES (symtab_hdr);
11410 rel_end = relocs + sec->reloc_count;
11411 for (rel = relocs; rel < rel_end; rel++)
11413 struct elf_link_hash_entry *h;
11414 struct elf32_arm_link_hash_entry *eh;
11415 unsigned long r_symndx;
11418 r_symndx = ELF32_R_SYM (rel->r_info);
11419 r_type = ELF32_R_TYPE (rel->r_info);
11420 r_type = arm_real_reloc_type (htab, r_type);
11422 if (r_symndx >= nsyms
11423 /* PR 9934: It is possible to have relocations that do not
11424 refer to symbols, thus it is also possible to have an
11425 object file containing relocations but no symbol table. */
11426 && (r_symndx > STN_UNDEF || nsyms > 0))
11428 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
11433 if (nsyms == 0 || r_symndx < symtab_hdr->sh_info)
11437 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
11438 while (h->root.type == bfd_link_hash_indirect
11439 || h->root.type == bfd_link_hash_warning)
11440 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11443 eh = (struct elf32_arm_link_hash_entry *) h;
11445 call_reloc_p = FALSE;
11446 may_become_dynamic_p = FALSE;
11447 may_need_local_target_p = FALSE;
11449 /* Could be done earlier, if h were already available. */
11450 r_type = elf32_arm_tls_transition (info, r_type, h);
11454 case R_ARM_GOT_PREL:
11455 case R_ARM_TLS_GD32:
11456 case R_ARM_TLS_IE32:
11457 case R_ARM_TLS_GOTDESC:
11458 case R_ARM_TLS_DESCSEQ:
11459 case R_ARM_THM_TLS_DESCSEQ:
11460 case R_ARM_TLS_CALL:
11461 case R_ARM_THM_TLS_CALL:
11462 /* This symbol requires a global offset table entry. */
11464 int tls_type, old_tls_type;
11468 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
11470 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
11472 case R_ARM_TLS_GOTDESC:
11473 case R_ARM_TLS_CALL: case R_ARM_THM_TLS_CALL:
11474 case R_ARM_TLS_DESCSEQ: case R_ARM_THM_TLS_DESCSEQ:
11475 tls_type = GOT_TLS_GDESC; break;
11477 default: tls_type = GOT_NORMAL; break;
11483 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
11487 bfd_signed_vma *local_got_refcounts;
11489 /* This is a global offset table entry for a local symbol. */
11490 local_got_refcounts = elf_local_got_refcounts (abfd);
11491 if (local_got_refcounts == NULL)
11493 bfd_size_type size;
11495 size = symtab_hdr->sh_info;
11496 size *= (sizeof (bfd_signed_vma)
11497 + sizeof (bfd_vma) + sizeof (char));
11498 local_got_refcounts = (bfd_signed_vma *)
11499 bfd_zalloc (abfd, size);
11500 if (local_got_refcounts == NULL)
11502 elf_local_got_refcounts (abfd) = local_got_refcounts;
11503 elf32_arm_local_tlsdesc_gotent (abfd)
11504 = (bfd_vma *) (local_got_refcounts
11505 + symtab_hdr->sh_info);
11506 elf32_arm_local_got_tls_type (abfd)
11507 = (char *) (elf32_arm_local_tlsdesc_gotent (abfd)
11508 + symtab_hdr->sh_info);
11510 local_got_refcounts[r_symndx] += 1;
11511 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
11514 /* If a variable is accessed with both tls methods, two
11515 slots may be created. */
11516 if (GOT_TLS_GD_ANY_P (old_tls_type)
11517 && GOT_TLS_GD_ANY_P (tls_type))
11518 tls_type |= old_tls_type;
11520 /* We will already have issued an error message if there
11521 is a TLS/non-TLS mismatch, based on the symbol
11522 type. So just combine any TLS types needed. */
11523 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
11524 && tls_type != GOT_NORMAL)
11525 tls_type |= old_tls_type;
11527 /* If the symbol is accessed in both IE and GDESC
11528 method, we're able to relax. Turn off the GDESC flag,
11529 without messing up with any other kind of tls types
11530 that may be involved */
11531 if ((tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GDESC))
11532 tls_type &= ~GOT_TLS_GDESC;
11534 if (old_tls_type != tls_type)
11537 elf32_arm_hash_entry (h)->tls_type = tls_type;
11539 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
11542 /* Fall through. */
11544 case R_ARM_TLS_LDM32:
11545 if (r_type == R_ARM_TLS_LDM32)
11546 htab->tls_ldm_got.refcount++;
11547 /* Fall through. */
11549 case R_ARM_GOTOFF32:
11551 if (htab->root.sgot == NULL
11552 && !create_got_section (htab->root.dynobj, info))
11561 case R_ARM_THM_CALL:
11562 case R_ARM_THM_JUMP24:
11563 case R_ARM_THM_JUMP19:
11564 call_reloc_p = TRUE;
11565 may_need_local_target_p = TRUE;
11569 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
11570 ldr __GOTT_INDEX__ offsets. */
11571 if (!htab->vxworks_p)
11573 may_need_local_target_p = TRUE;
11576 /* Fall through. */
11578 case R_ARM_MOVW_ABS_NC:
11579 case R_ARM_MOVT_ABS:
11580 case R_ARM_THM_MOVW_ABS_NC:
11581 case R_ARM_THM_MOVT_ABS:
11584 (*_bfd_error_handler)
11585 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
11586 abfd, elf32_arm_howto_table_1[r_type].name,
11587 (h) ? h->root.root.string : "a local symbol");
11588 bfd_set_error (bfd_error_bad_value);
11592 /* Fall through. */
11594 case R_ARM_ABS32_NOI:
11596 case R_ARM_REL32_NOI:
11597 case R_ARM_MOVW_PREL_NC:
11598 case R_ARM_MOVT_PREL:
11599 case R_ARM_THM_MOVW_PREL_NC:
11600 case R_ARM_THM_MOVT_PREL:
11602 /* Should the interworking branches be listed here? */
11603 /* If we are creating a shared library or relocatable
11604 executable, and this is a reloc against a global symbol,
11605 or a non-PC-relative reloc against a local symbol,
11606 then we may need to copy the reloc into the output. */
11607 if ((info->shared || htab->root.is_relocatable_executable)
11608 && (sec->flags & SEC_ALLOC) != 0
11610 || (r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)))
11611 may_become_dynamic_p = TRUE;
11613 may_need_local_target_p = TRUE;
11616 /* This relocation describes the C++ object vtable hierarchy.
11617 Reconstruct it for later use during GC. */
11618 case R_ARM_GNU_VTINHERIT:
11619 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
11623 /* This relocation describes which C++ vtable entries are actually
11624 used. Record for later use during GC. */
11625 case R_ARM_GNU_VTENTRY:
11626 BFD_ASSERT (h != NULL);
11628 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
11636 /* We may need a .plt entry if the function this reloc
11637 refers to is in a different object, regardless of the
11638 symbol's type. We can't tell for sure yet, because
11639 something later might force the symbol local. */
11641 else if (may_need_local_target_p)
11642 /* If this reloc is in a read-only section, we might
11643 need a copy reloc. We can't check reliably at this
11644 stage whether the section is read-only, as input
11645 sections have not yet been mapped to output sections.
11646 Tentatively set the flag for now, and correct in
11647 adjust_dynamic_symbol. */
11648 h->non_got_ref = 1;
11651 if (may_need_local_target_p && h != NULL)
11653 /* If the symbol is a function that doesn't bind locally,
11654 this relocation will need a PLT entry. */
11655 h->plt.refcount += 1;
11657 /* It's too early to use htab->use_blx here, so we have to
11658 record possible blx references separately from
11659 relocs that definitely need a thumb stub. */
11661 if (r_type == R_ARM_THM_CALL)
11662 eh->plt_maybe_thumb_refcount += 1;
11664 if (r_type == R_ARM_THM_JUMP24
11665 || r_type == R_ARM_THM_JUMP19)
11666 eh->plt_thumb_refcount += 1;
11669 if (may_become_dynamic_p)
11671 struct elf_dyn_relocs *p, **head;
11673 /* Create a reloc section in dynobj. */
11674 if (sreloc == NULL)
11676 sreloc = _bfd_elf_make_dynamic_reloc_section
11677 (sec, dynobj, 2, abfd, ! htab->use_rel);
11679 if (sreloc == NULL)
11682 /* BPABI objects never have dynamic relocations mapped. */
11683 if (htab->symbian_p)
11687 flags = bfd_get_section_flags (dynobj, sreloc);
11688 flags &= ~(SEC_LOAD | SEC_ALLOC);
11689 bfd_set_section_flags (dynobj, sreloc, flags);
11693 /* If this is a global symbol, count the number of
11694 relocations we need for this symbol. */
11696 head = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs;
11699 /* Track dynamic relocs needed for local syms too.
11700 We really need local syms available to do this
11701 easily. Oh well. */
11704 Elf_Internal_Sym *isym;
11706 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
11711 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
11715 vpp = &elf_section_data (s)->local_dynrel;
11716 head = (struct elf_dyn_relocs **) vpp;
11720 if (p == NULL || p->sec != sec)
11722 bfd_size_type amt = sizeof *p;
11724 p = (struct elf_dyn_relocs *) bfd_alloc (htab->root.dynobj, amt);
11734 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
11743 /* Unwinding tables are not referenced directly. This pass marks them as
11744 required if the corresponding code section is marked. */
11747 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
11748 elf_gc_mark_hook_fn gc_mark_hook)
11751 Elf_Internal_Shdr **elf_shdrp;
11754 /* Marking EH data may cause additional code sections to be marked,
11755 requiring multiple passes. */
11760 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
11764 if (! is_arm_elf (sub))
11767 elf_shdrp = elf_elfsections (sub);
11768 for (o = sub->sections; o != NULL; o = o->next)
11770 Elf_Internal_Shdr *hdr;
11772 hdr = &elf_section_data (o)->this_hdr;
11773 if (hdr->sh_type == SHT_ARM_EXIDX
11775 && hdr->sh_link < elf_numsections (sub)
11777 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
11780 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
11790 /* Treat mapping symbols as special target symbols. */
11793 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
11795 return bfd_is_arm_special_symbol_name (sym->name,
11796 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
11799 /* This is a copy of elf_find_function() from elf.c except that
11800 ARM mapping symbols are ignored when looking for function names
11801 and STT_ARM_TFUNC is considered to a function type. */
11804 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
11805 asection * section,
11806 asymbol ** symbols,
11808 const char ** filename_ptr,
11809 const char ** functionname_ptr)
11811 const char * filename = NULL;
11812 asymbol * func = NULL;
11813 bfd_vma low_func = 0;
11816 for (p = symbols; *p != NULL; p++)
11818 elf_symbol_type *q;
11820 q = (elf_symbol_type *) *p;
11822 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
11827 filename = bfd_asymbol_name (&q->symbol);
11830 case STT_ARM_TFUNC:
11832 /* Skip mapping symbols. */
11833 if ((q->symbol.flags & BSF_LOCAL)
11834 && bfd_is_arm_special_symbol_name (q->symbol.name,
11835 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
11837 /* Fall through. */
11838 if (bfd_get_section (&q->symbol) == section
11839 && q->symbol.value >= low_func
11840 && q->symbol.value <= offset)
11842 func = (asymbol *) q;
11843 low_func = q->symbol.value;
11853 *filename_ptr = filename;
11854 if (functionname_ptr)
11855 *functionname_ptr = bfd_asymbol_name (func);
11861 /* Find the nearest line to a particular section and offset, for error
11862 reporting. This code is a duplicate of the code in elf.c, except
11863 that it uses arm_elf_find_function. */
11866 elf32_arm_find_nearest_line (bfd * abfd,
11867 asection * section,
11868 asymbol ** symbols,
11870 const char ** filename_ptr,
11871 const char ** functionname_ptr,
11872 unsigned int * line_ptr)
11874 bfd_boolean found = FALSE;
11876 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
11878 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
11879 filename_ptr, functionname_ptr,
11881 & elf_tdata (abfd)->dwarf2_find_line_info))
11883 if (!*functionname_ptr)
11884 arm_elf_find_function (abfd, section, symbols, offset,
11885 *filename_ptr ? NULL : filename_ptr,
11891 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
11892 & found, filename_ptr,
11893 functionname_ptr, line_ptr,
11894 & elf_tdata (abfd)->line_info))
11897 if (found && (*functionname_ptr || *line_ptr))
11900 if (symbols == NULL)
11903 if (! arm_elf_find_function (abfd, section, symbols, offset,
11904 filename_ptr, functionname_ptr))
11912 elf32_arm_find_inliner_info (bfd * abfd,
11913 const char ** filename_ptr,
11914 const char ** functionname_ptr,
11915 unsigned int * line_ptr)
11918 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
11919 functionname_ptr, line_ptr,
11920 & elf_tdata (abfd)->dwarf2_find_line_info);
11924 /* Adjust a symbol defined by a dynamic object and referenced by a
11925 regular object. The current definition is in some section of the
11926 dynamic object, but we're not including those sections. We have to
11927 change the definition to something the rest of the link can
11931 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
11932 struct elf_link_hash_entry * h)
11936 struct elf32_arm_link_hash_entry * eh;
11937 struct elf32_arm_link_hash_table *globals;
11939 globals = elf32_arm_hash_table (info);
11940 if (globals == NULL)
11943 dynobj = elf_hash_table (info)->dynobj;
11945 /* Make sure we know what is going on here. */
11946 BFD_ASSERT (dynobj != NULL
11948 || h->u.weakdef != NULL
11951 && !h->def_regular)));
11953 eh = (struct elf32_arm_link_hash_entry *) h;
11955 /* If this is a function, put it in the procedure linkage table. We
11956 will fill in the contents of the procedure linkage table later,
11957 when we know the address of the .got section. */
11958 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
11961 if (h->plt.refcount <= 0
11962 || SYMBOL_CALLS_LOCAL (info, h)
11963 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
11964 && h->root.type == bfd_link_hash_undefweak))
11966 /* This case can occur if we saw a PLT32 reloc in an input
11967 file, but the symbol was never referred to by a dynamic
11968 object, or if all references were garbage collected. In
11969 such a case, we don't actually need to build a procedure
11970 linkage table, and we can just do a PC24 reloc instead. */
11971 h->plt.offset = (bfd_vma) -1;
11972 eh->plt_thumb_refcount = 0;
11973 eh->plt_maybe_thumb_refcount = 0;
11981 /* It's possible that we incorrectly decided a .plt reloc was
11982 needed for an R_ARM_PC24 or similar reloc to a non-function sym
11983 in check_relocs. We can't decide accurately between function
11984 and non-function syms in check-relocs; Objects loaded later in
11985 the link may change h->type. So fix it now. */
11986 h->plt.offset = (bfd_vma) -1;
11987 eh->plt_thumb_refcount = 0;
11988 eh->plt_maybe_thumb_refcount = 0;
11991 /* If this is a weak symbol, and there is a real definition, the
11992 processor independent code will have arranged for us to see the
11993 real definition first, and we can just use the same value. */
11994 if (h->u.weakdef != NULL)
11996 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
11997 || h->u.weakdef->root.type == bfd_link_hash_defweak);
11998 h->root.u.def.section = h->u.weakdef->root.u.def.section;
11999 h->root.u.def.value = h->u.weakdef->root.u.def.value;
12003 /* If there are no non-GOT references, we do not need a copy
12005 if (!h->non_got_ref)
12008 /* This is a reference to a symbol defined by a dynamic object which
12009 is not a function. */
12011 /* If we are creating a shared library, we must presume that the
12012 only references to the symbol are via the global offset table.
12013 For such cases we need not do anything here; the relocations will
12014 be handled correctly by relocate_section. Relocatable executables
12015 can reference data in shared objects directly, so we don't need to
12016 do anything here. */
12017 if (info->shared || globals->root.is_relocatable_executable)
12022 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
12023 h->root.root.string);
12027 /* We must allocate the symbol in our .dynbss section, which will
12028 become part of the .bss section of the executable. There will be
12029 an entry for this symbol in the .dynsym section. The dynamic
12030 object will contain position independent code, so all references
12031 from the dynamic object to this symbol will go through the global
12032 offset table. The dynamic linker will use the .dynsym entry to
12033 determine the address it must put in the global offset table, so
12034 both the dynamic object and the regular object will refer to the
12035 same memory location for the variable. */
12036 s = bfd_get_section_by_name (dynobj, ".dynbss");
12037 BFD_ASSERT (s != NULL);
12039 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
12040 copy the initial value out of the dynamic object and into the
12041 runtime process image. We need to remember the offset into the
12042 .rel(a).bss section we are going to use. */
12043 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
12047 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
12048 elf32_arm_allocate_dynrelocs (info, srel, 1);
12052 return _bfd_elf_adjust_dynamic_copy (h, s);
12055 /* Allocate space in .plt, .got and associated reloc sections for
12059 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf)
12061 struct bfd_link_info *info;
12062 struct elf32_arm_link_hash_table *htab;
12063 struct elf32_arm_link_hash_entry *eh;
12064 struct elf_dyn_relocs *p;
12065 bfd_signed_vma thumb_refs;
12067 if (h->root.type == bfd_link_hash_indirect)
12070 if (h->root.type == bfd_link_hash_warning)
12071 /* When warning symbols are created, they **replace** the "real"
12072 entry in the hash table, thus we never get to see the real
12073 symbol in a hash traversal. So look at it now. */
12074 h = (struct elf_link_hash_entry *) h->root.u.i.link;
12076 eh = (struct elf32_arm_link_hash_entry *) h;
12078 info = (struct bfd_link_info *) inf;
12079 htab = elf32_arm_hash_table (info);
12083 if (htab->root.dynamic_sections_created
12084 && h->plt.refcount > 0)
12086 /* Make sure this symbol is output as a dynamic symbol.
12087 Undefined weak syms won't yet be marked as dynamic. */
12088 if (h->dynindx == -1
12089 && !h->forced_local)
12091 if (! bfd_elf_link_record_dynamic_symbol (info, h))
12096 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
12098 asection *s = htab->root.splt;
12100 /* If this is the first .plt entry, make room for the special
12103 s->size += htab->plt_header_size;
12105 h->plt.offset = s->size;
12107 /* If we will insert a Thumb trampoline before this PLT, leave room
12109 thumb_refs = eh->plt_thumb_refcount;
12110 if (!htab->use_blx)
12111 thumb_refs += eh->plt_maybe_thumb_refcount;
12113 if (thumb_refs > 0)
12115 h->plt.offset += PLT_THUMB_STUB_SIZE;
12116 s->size += PLT_THUMB_STUB_SIZE;
12119 /* If this symbol is not defined in a regular file, and we are
12120 not generating a shared library, then set the symbol to this
12121 location in the .plt. This is required to make function
12122 pointers compare as equal between the normal executable and
12123 the shared library. */
12125 && !h->def_regular)
12127 h->root.u.def.section = s;
12128 h->root.u.def.value = h->plt.offset;
12130 /* Make sure the function is not marked as Thumb, in case
12131 it is the target of an ABS32 relocation, which will
12132 point to the PLT entry. */
12133 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
12134 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
12137 /* Make room for this entry. */
12138 s->size += htab->plt_entry_size;
12140 if (!htab->symbian_p)
12142 /* We also need to make an entry in the .got.plt section, which
12143 will be placed in the .got section by the linker script. */
12144 eh->plt_got_offset = (htab->root.sgotplt->size
12145 - 8 * htab->num_tls_desc);
12146 htab->root.sgotplt->size += 4;
12149 /* We also need to make an entry in the .rel(a).plt section. */
12150 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
12151 htab->next_tls_desc_index++;
12153 /* VxWorks executables have a second set of relocations for
12154 each PLT entry. They go in a separate relocation section,
12155 which is processed by the kernel loader. */
12156 if (htab->vxworks_p && !info->shared)
12158 /* There is a relocation for the initial PLT entry:
12159 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
12160 if (h->plt.offset == htab->plt_header_size)
12161 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 1);
12163 /* There are two extra relocations for each subsequent
12164 PLT entry: an R_ARM_32 relocation for the GOT entry,
12165 and an R_ARM_32 relocation for the PLT entry. */
12166 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 2);
12171 h->plt.offset = (bfd_vma) -1;
12177 h->plt.offset = (bfd_vma) -1;
12181 eh = (struct elf32_arm_link_hash_entry *) h;
12182 eh->tlsdesc_got = (bfd_vma) -1;
12184 if (h->got.refcount > 0)
12188 int tls_type = elf32_arm_hash_entry (h)->tls_type;
12191 /* Make sure this symbol is output as a dynamic symbol.
12192 Undefined weak syms won't yet be marked as dynamic. */
12193 if (h->dynindx == -1
12194 && !h->forced_local)
12196 if (! bfd_elf_link_record_dynamic_symbol (info, h))
12200 if (!htab->symbian_p)
12202 s = htab->root.sgot;
12203 h->got.offset = s->size;
12205 if (tls_type == GOT_UNKNOWN)
12208 if (tls_type == GOT_NORMAL)
12209 /* Non-TLS symbols need one GOT slot. */
12213 if (tls_type & GOT_TLS_GDESC)
12215 /* R_ARM_TLS_DESC needs 2 GOT slots. */
12217 = (htab->root.sgotplt->size
12218 - elf32_arm_compute_jump_table_size (htab));
12219 htab->root.sgotplt->size += 8;
12220 h->got.offset = (bfd_vma) -2;
12221 /* plt_got_offset needs to know there's a TLS_DESC
12222 reloc in the middle of .got.plt. */
12223 htab->num_tls_desc++;
12226 if (tls_type & GOT_TLS_GD)
12228 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
12229 the symbol is both GD and GDESC, got.offset may
12230 have been overwritten. */
12231 h->got.offset = s->size;
12235 if (tls_type & GOT_TLS_IE)
12236 /* R_ARM_TLS_IE32 needs one GOT slot. */
12240 dyn = htab->root.dynamic_sections_created;
12243 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
12245 || !SYMBOL_REFERENCES_LOCAL (info, h)))
12248 if (tls_type != GOT_NORMAL
12249 && (info->shared || indx != 0)
12250 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
12251 || h->root.type != bfd_link_hash_undefweak))
12253 if (tls_type & GOT_TLS_IE)
12254 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
12256 if (tls_type & GOT_TLS_GD)
12257 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
12259 if (tls_type & GOT_TLS_GDESC)
12261 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
12262 /* GDESC needs a trampoline to jump to. */
12263 htab->tls_trampoline = -1;
12266 /* Only GD needs it. GDESC just emits one relocation per
12268 if ((tls_type & GOT_TLS_GD) && indx != 0)
12269 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
12271 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
12273 if (htab->root.dynamic_sections_created)
12274 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
12275 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
12277 else if (info->shared)
12278 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
12279 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
12283 h->got.offset = (bfd_vma) -1;
12285 /* Allocate stubs for exported Thumb functions on v4t. */
12286 if (!htab->use_blx && h->dynindx != -1
12288 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
12289 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
12291 struct elf_link_hash_entry * th;
12292 struct bfd_link_hash_entry * bh;
12293 struct elf_link_hash_entry * myh;
12297 /* Create a new symbol to regist the real location of the function. */
12298 s = h->root.u.def.section;
12299 sprintf (name, "__real_%s", h->root.root.string);
12300 _bfd_generic_link_add_one_symbol (info, s->owner,
12301 name, BSF_GLOBAL, s,
12302 h->root.u.def.value,
12303 NULL, TRUE, FALSE, &bh);
12305 myh = (struct elf_link_hash_entry *) bh;
12306 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
12307 myh->forced_local = 1;
12308 eh->export_glue = myh;
12309 th = record_arm_to_thumb_glue (info, h);
12310 /* Point the symbol at the stub. */
12311 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
12312 h->root.u.def.section = th->root.u.def.section;
12313 h->root.u.def.value = th->root.u.def.value & ~1;
12316 if (eh->dyn_relocs == NULL)
12319 /* In the shared -Bsymbolic case, discard space allocated for
12320 dynamic pc-relative relocs against symbols which turn out to be
12321 defined in regular objects. For the normal shared case, discard
12322 space for pc-relative relocs that have become local due to symbol
12323 visibility changes. */
12325 if (info->shared || htab->root.is_relocatable_executable)
12327 /* The only relocs that use pc_count are R_ARM_REL32 and
12328 R_ARM_REL32_NOI, which will appear on something like
12329 ".long foo - .". We want calls to protected symbols to resolve
12330 directly to the function rather than going via the plt. If people
12331 want function pointer comparisons to work as expected then they
12332 should avoid writing assembly like ".long foo - .". */
12333 if (SYMBOL_CALLS_LOCAL (info, h))
12335 struct elf_dyn_relocs **pp;
12337 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
12339 p->count -= p->pc_count;
12348 if (htab->vxworks_p)
12350 struct elf_dyn_relocs **pp;
12352 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
12354 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
12361 /* Also discard relocs on undefined weak syms with non-default
12363 if (eh->dyn_relocs != NULL
12364 && h->root.type == bfd_link_hash_undefweak)
12366 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
12367 eh->dyn_relocs = NULL;
12369 /* Make sure undefined weak symbols are output as a dynamic
12371 else if (h->dynindx == -1
12372 && !h->forced_local)
12374 if (! bfd_elf_link_record_dynamic_symbol (info, h))
12379 else if (htab->root.is_relocatable_executable && h->dynindx == -1
12380 && h->root.type == bfd_link_hash_new)
12382 /* Output absolute symbols so that we can create relocations
12383 against them. For normal symbols we output a relocation
12384 against the section that contains them. */
12385 if (! bfd_elf_link_record_dynamic_symbol (info, h))
12392 /* For the non-shared case, discard space for relocs against
12393 symbols which turn out to need copy relocs or are not
12396 if (!h->non_got_ref
12397 && ((h->def_dynamic
12398 && !h->def_regular)
12399 || (htab->root.dynamic_sections_created
12400 && (h->root.type == bfd_link_hash_undefweak
12401 || h->root.type == bfd_link_hash_undefined))))
12403 /* Make sure this symbol is output as a dynamic symbol.
12404 Undefined weak syms won't yet be marked as dynamic. */
12405 if (h->dynindx == -1
12406 && !h->forced_local)
12408 if (! bfd_elf_link_record_dynamic_symbol (info, h))
12412 /* If that succeeded, we know we'll be keeping all the
12414 if (h->dynindx != -1)
12418 eh->dyn_relocs = NULL;
12423 /* Finally, allocate space. */
12424 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12426 asection *sreloc = elf_section_data (p->sec)->sreloc;
12427 elf32_arm_allocate_dynrelocs (info, sreloc, p->count);
12433 /* Find any dynamic relocs that apply to read-only sections. */
12436 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
12438 struct elf32_arm_link_hash_entry * eh;
12439 struct elf_dyn_relocs * p;
12441 if (h->root.type == bfd_link_hash_warning)
12442 h = (struct elf_link_hash_entry *) h->root.u.i.link;
12444 eh = (struct elf32_arm_link_hash_entry *) h;
12445 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12447 asection *s = p->sec;
12449 if (s != NULL && (s->flags & SEC_READONLY) != 0)
12451 struct bfd_link_info *info = (struct bfd_link_info *) inf;
12453 info->flags |= DF_TEXTREL;
12455 /* Not an error, just cut short the traversal. */
12463 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
12466 struct elf32_arm_link_hash_table *globals;
12468 globals = elf32_arm_hash_table (info);
12469 if (globals == NULL)
12472 globals->byteswap_code = byteswap_code;
12475 /* Set the sizes of the dynamic sections. */
12478 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
12479 struct bfd_link_info * info)
12484 bfd_boolean relocs;
12486 struct elf32_arm_link_hash_table *htab;
12488 htab = elf32_arm_hash_table (info);
12492 dynobj = elf_hash_table (info)->dynobj;
12493 BFD_ASSERT (dynobj != NULL);
12494 check_use_blx (htab);
12496 if (elf_hash_table (info)->dynamic_sections_created)
12498 /* Set the contents of the .interp section to the interpreter. */
12499 if (info->executable)
12501 s = bfd_get_section_by_name (dynobj, ".interp");
12502 BFD_ASSERT (s != NULL);
12503 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
12504 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
12508 /* Set up .got offsets for local syms, and space for local dynamic
12510 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
12512 bfd_signed_vma *local_got;
12513 bfd_signed_vma *end_local_got;
12514 char *local_tls_type;
12515 bfd_vma *local_tlsdesc_gotent;
12516 bfd_size_type locsymcount;
12517 Elf_Internal_Shdr *symtab_hdr;
12519 bfd_boolean is_vxworks = htab->vxworks_p;
12521 if (! is_arm_elf (ibfd))
12524 for (s = ibfd->sections; s != NULL; s = s->next)
12526 struct elf_dyn_relocs *p;
12528 for (p = (struct elf_dyn_relocs *)
12529 elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
12531 if (!bfd_is_abs_section (p->sec)
12532 && bfd_is_abs_section (p->sec->output_section))
12534 /* Input section has been discarded, either because
12535 it is a copy of a linkonce section or due to
12536 linker script /DISCARD/, so we'll be discarding
12539 else if (is_vxworks
12540 && strcmp (p->sec->output_section->name,
12543 /* Relocations in vxworks .tls_vars sections are
12544 handled specially by the loader. */
12546 else if (p->count != 0)
12548 srel = elf_section_data (p->sec)->sreloc;
12549 elf32_arm_allocate_dynrelocs (info, srel, p->count);
12550 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
12551 info->flags |= DF_TEXTREL;
12556 local_got = elf_local_got_refcounts (ibfd);
12560 symtab_hdr = & elf_symtab_hdr (ibfd);
12561 locsymcount = symtab_hdr->sh_info;
12562 end_local_got = local_got + locsymcount;
12563 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
12564 local_tlsdesc_gotent = elf32_arm_local_tlsdesc_gotent (ibfd);
12565 s = htab->root.sgot;
12566 srel = htab->root.srelgot;
12567 for (; local_got < end_local_got;
12568 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
12570 *local_tlsdesc_gotent = (bfd_vma) -1;
12571 if (*local_got > 0)
12573 *local_got = s->size;
12574 if (*local_tls_type & GOT_TLS_GD)
12575 /* TLS_GD relocs need an 8-byte structure in the GOT. */
12577 if (*local_tls_type & GOT_TLS_GDESC)
12579 *local_tlsdesc_gotent = htab->root.sgotplt->size
12580 - elf32_arm_compute_jump_table_size (htab);
12581 htab->root.sgotplt->size += 8;
12582 *local_got = (bfd_vma) -2;
12583 /* plt_got_offset needs to know there's a TLS_DESC
12584 reloc in the middle of .got.plt. */
12585 htab->num_tls_desc++;
12587 if (*local_tls_type & GOT_TLS_IE)
12590 if (*local_tls_type & GOT_NORMAL)
12592 /* If the symbol is both GD and GDESC, *local_got
12593 may have been overwritten. */
12594 *local_got = s->size;
12598 if ((info->shared && !(*local_tls_type & GOT_TLS_GDESC))
12599 || *local_tls_type & GOT_TLS_GD)
12600 elf32_arm_allocate_dynrelocs (info, srel, 1);
12602 if (info->shared && *local_tls_type & GOT_TLS_GDESC)
12604 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
12605 htab->tls_trampoline = -1;
12609 *local_got = (bfd_vma) -1;
12613 if (htab->tls_ldm_got.refcount > 0)
12615 /* Allocate two GOT entries and one dynamic relocation (if necessary)
12616 for R_ARM_TLS_LDM32 relocations. */
12617 htab->tls_ldm_got.offset = htab->root.sgot->size;
12618 htab->root.sgot->size += 8;
12620 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
12623 htab->tls_ldm_got.offset = -1;
12625 /* Allocate global sym .plt and .got entries, and space for global
12626 sym dynamic relocs. */
12627 elf_link_hash_traverse (& htab->root, allocate_dynrelocs_for_symbol, info);
12629 /* Here we rummage through the found bfds to collect glue information. */
12630 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
12632 if (! is_arm_elf (ibfd))
12635 /* Initialise mapping tables for code/data. */
12636 bfd_elf32_arm_init_maps (ibfd);
12638 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
12639 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
12640 /* xgettext:c-format */
12641 _bfd_error_handler (_("Errors encountered processing file %s"),
12645 /* Allocate space for the glue sections now that we've sized them. */
12646 bfd_elf32_arm_allocate_interworking_sections (info);
12648 /* For every jump slot reserved in the sgotplt, reloc_count is
12649 incremented. However, when we reserve space for TLS descriptors,
12650 it's not incremented, so in order to compute the space reserved
12651 for them, it suffices to multiply the reloc count by the jump
12653 if (htab->root.srelplt)
12654 htab->sgotplt_jump_table_size = elf32_arm_compute_jump_table_size(htab);
12656 if (htab->tls_trampoline)
12658 if (htab->root.splt->size == 0)
12659 htab->root.splt->size += htab->plt_header_size;
12661 htab->tls_trampoline = htab->root.splt->size;
12662 htab->root.splt->size += htab->plt_entry_size;
12664 /* If we're not using lazy TLS relocations, don't generate the
12665 PLT and GOT entries they require. */
12666 if (!(info->flags & DF_BIND_NOW))
12668 htab->dt_tlsdesc_got = htab->root.sgot->size;
12669 htab->root.sgot->size += 4;
12671 htab->dt_tlsdesc_plt = htab->root.splt->size;
12672 htab->root.splt->size += 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline);
12676 /* The check_relocs and adjust_dynamic_symbol entry points have
12677 determined the sizes of the various dynamic sections. Allocate
12678 memory for them. */
12681 for (s = dynobj->sections; s != NULL; s = s->next)
12685 if ((s->flags & SEC_LINKER_CREATED) == 0)
12688 /* It's OK to base decisions on the section name, because none
12689 of the dynobj section names depend upon the input files. */
12690 name = bfd_get_section_name (dynobj, s);
12692 if (strcmp (name, ".plt") == 0)
12694 /* Remember whether there is a PLT. */
12695 plt = s->size != 0;
12697 else if (CONST_STRNEQ (name, ".rel"))
12701 /* Remember whether there are any reloc sections other
12702 than .rel(a).plt and .rela.plt.unloaded. */
12703 if (s != htab->root.srelplt && s != htab->srelplt2)
12706 /* We use the reloc_count field as a counter if we need
12707 to copy relocs into the output file. */
12708 s->reloc_count = 0;
12711 else if (! CONST_STRNEQ (name, ".got")
12712 && strcmp (name, ".dynbss") != 0)
12714 /* It's not one of our sections, so don't allocate space. */
12720 /* If we don't need this section, strip it from the
12721 output file. This is mostly to handle .rel(a).bss and
12722 .rel(a).plt. We must create both sections in
12723 create_dynamic_sections, because they must be created
12724 before the linker maps input sections to output
12725 sections. The linker does that before
12726 adjust_dynamic_symbol is called, and it is that
12727 function which decides whether anything needs to go
12728 into these sections. */
12729 s->flags |= SEC_EXCLUDE;
12733 if ((s->flags & SEC_HAS_CONTENTS) == 0)
12736 /* Allocate memory for the section contents. */
12737 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
12738 if (s->contents == NULL)
12742 if (elf_hash_table (info)->dynamic_sections_created)
12744 /* Add some entries to the .dynamic section. We fill in the
12745 values later, in elf32_arm_finish_dynamic_sections, but we
12746 must add the entries now so that we get the correct size for
12747 the .dynamic section. The DT_DEBUG entry is filled in by the
12748 dynamic linker and used by the debugger. */
12749 #define add_dynamic_entry(TAG, VAL) \
12750 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
12752 if (info->executable)
12754 if (!add_dynamic_entry (DT_DEBUG, 0))
12760 if ( !add_dynamic_entry (DT_PLTGOT, 0)
12761 || !add_dynamic_entry (DT_PLTRELSZ, 0)
12762 || !add_dynamic_entry (DT_PLTREL,
12763 htab->use_rel ? DT_REL : DT_RELA)
12764 || !add_dynamic_entry (DT_JMPREL, 0))
12767 if (htab->dt_tlsdesc_plt &&
12768 (!add_dynamic_entry (DT_TLSDESC_PLT,0)
12769 || !add_dynamic_entry (DT_TLSDESC_GOT,0)))
12777 if (!add_dynamic_entry (DT_REL, 0)
12778 || !add_dynamic_entry (DT_RELSZ, 0)
12779 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
12784 if (!add_dynamic_entry (DT_RELA, 0)
12785 || !add_dynamic_entry (DT_RELASZ, 0)
12786 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
12791 /* If any dynamic relocs apply to a read-only section,
12792 then we need a DT_TEXTREL entry. */
12793 if ((info->flags & DF_TEXTREL) == 0)
12794 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
12797 if ((info->flags & DF_TEXTREL) != 0)
12799 if (!add_dynamic_entry (DT_TEXTREL, 0))
12802 if (htab->vxworks_p
12803 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
12806 #undef add_dynamic_entry
12811 /* Size sections even though they're not dynamic. We use it to setup
12812 _TLS_MODULE_BASE_, if needed. */
12815 elf32_arm_always_size_sections (bfd *output_bfd,
12816 struct bfd_link_info *info)
12820 if (info->relocatable)
12823 tls_sec = elf_hash_table (info)->tls_sec;
12827 struct elf_link_hash_entry *tlsbase;
12829 tlsbase = elf_link_hash_lookup
12830 (elf_hash_table (info), "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
12834 struct bfd_link_hash_entry *bh = NULL;
12835 const struct elf_backend_data *bed
12836 = get_elf_backend_data (output_bfd);
12838 if (!(_bfd_generic_link_add_one_symbol
12839 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
12840 tls_sec, 0, NULL, FALSE,
12841 bed->collect, &bh)))
12844 tlsbase->type = STT_TLS;
12845 tlsbase = (struct elf_link_hash_entry *)bh;
12846 tlsbase->def_regular = 1;
12847 tlsbase->other = STV_HIDDEN;
12848 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
12854 /* Finish up dynamic symbol handling. We set the contents of various
12855 dynamic sections here. */
12858 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
12859 struct bfd_link_info * info,
12860 struct elf_link_hash_entry * h,
12861 Elf_Internal_Sym * sym)
12863 struct elf32_arm_link_hash_table *htab;
12864 struct elf32_arm_link_hash_entry *eh;
12866 htab = elf32_arm_hash_table (info);
12870 eh = (struct elf32_arm_link_hash_entry *) h;
12872 if (h->plt.offset != (bfd_vma) -1)
12878 Elf_Internal_Rela rel;
12880 /* This symbol has an entry in the procedure linkage table. Set
12883 BFD_ASSERT (h->dynindx != -1);
12885 splt = htab->root.splt;
12886 srel = htab->root.srelplt;
12887 BFD_ASSERT (splt != NULL && srel != NULL);
12889 /* Fill in the entry in the procedure linkage table. */
12890 if (htab->symbian_p)
12892 put_arm_insn (htab, output_bfd,
12893 elf32_arm_symbian_plt_entry[0],
12894 splt->contents + h->plt.offset);
12895 bfd_put_32 (output_bfd,
12896 elf32_arm_symbian_plt_entry[1],
12897 splt->contents + h->plt.offset + 4);
12899 /* Fill in the entry in the .rel.plt section. */
12900 rel.r_offset = (splt->output_section->vma
12901 + splt->output_offset
12902 + h->plt.offset + 4);
12903 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
12905 /* Get the index in the procedure linkage table which
12906 corresponds to this symbol. This is the index of this symbol
12907 in all the symbols for which we are making plt entries. The
12908 first entry in the procedure linkage table is reserved. */
12909 plt_index = ((h->plt.offset - htab->plt_header_size)
12910 / htab->plt_entry_size);
12914 bfd_vma got_offset, got_address, plt_address;
12915 bfd_vma got_displacement;
12919 sgot = htab->root.sgotplt;
12920 BFD_ASSERT (sgot != NULL);
12922 /* Get the offset into the .got.plt table of the entry that
12923 corresponds to this function. */
12924 got_offset = eh->plt_got_offset;
12926 /* Get the index in the procedure linkage table which
12927 corresponds to this symbol. This is the index of this symbol
12928 in all the symbols for which we are making plt entries. The
12929 first three entries in .got.plt are reserved; after that
12930 symbols appear in the same order as in .plt. */
12931 plt_index = (got_offset - 12) / 4;
12933 /* Calculate the address of the GOT entry. */
12934 got_address = (sgot->output_section->vma
12935 + sgot->output_offset
12938 /* ...and the address of the PLT entry. */
12939 plt_address = (splt->output_section->vma
12940 + splt->output_offset
12943 ptr = splt->contents + h->plt.offset;
12944 if (htab->vxworks_p && info->shared)
12949 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
12951 val = elf32_arm_vxworks_shared_plt_entry[i];
12953 val |= got_address - sgot->output_section->vma;
12955 val |= plt_index * RELOC_SIZE (htab);
12956 if (i == 2 || i == 5)
12957 bfd_put_32 (output_bfd, val, ptr);
12959 put_arm_insn (htab, output_bfd, val, ptr);
12962 else if (htab->vxworks_p)
12967 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
12969 val = elf32_arm_vxworks_exec_plt_entry[i];
12971 val |= got_address;
12973 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
12975 val |= plt_index * RELOC_SIZE (htab);
12976 if (i == 2 || i == 5)
12977 bfd_put_32 (output_bfd, val, ptr);
12979 put_arm_insn (htab, output_bfd, val, ptr);
12982 loc = (htab->srelplt2->contents
12983 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
12985 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
12986 referencing the GOT for this PLT entry. */
12987 rel.r_offset = plt_address + 8;
12988 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
12989 rel.r_addend = got_offset;
12990 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
12991 loc += RELOC_SIZE (htab);
12993 /* Create the R_ARM_ABS32 relocation referencing the
12994 beginning of the PLT for this GOT entry. */
12995 rel.r_offset = got_address;
12996 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
12998 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
13002 bfd_signed_vma thumb_refs;
13003 /* Calculate the displacement between the PLT slot and the
13004 entry in the GOT. The eight-byte offset accounts for the
13005 value produced by adding to pc in the first instruction
13006 of the PLT stub. */
13007 got_displacement = got_address - (plt_address + 8);
13009 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
13011 thumb_refs = eh->plt_thumb_refcount;
13012 if (!htab->use_blx)
13013 thumb_refs += eh->plt_maybe_thumb_refcount;
13015 if (thumb_refs > 0)
13017 put_thumb_insn (htab, output_bfd,
13018 elf32_arm_plt_thumb_stub[0], ptr - 4);
13019 put_thumb_insn (htab, output_bfd,
13020 elf32_arm_plt_thumb_stub[1], ptr - 2);
13023 put_arm_insn (htab, output_bfd,
13024 elf32_arm_plt_entry[0]
13025 | ((got_displacement & 0x0ff00000) >> 20),
13027 put_arm_insn (htab, output_bfd,
13028 elf32_arm_plt_entry[1]
13029 | ((got_displacement & 0x000ff000) >> 12),
13031 put_arm_insn (htab, output_bfd,
13032 elf32_arm_plt_entry[2]
13033 | (got_displacement & 0x00000fff),
13035 #ifdef FOUR_WORD_PLT
13036 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
13040 /* Fill in the entry in the global offset table. */
13041 bfd_put_32 (output_bfd,
13042 (splt->output_section->vma
13043 + splt->output_offset),
13044 sgot->contents + got_offset);
13046 /* Fill in the entry in the .rel(a).plt section. */
13048 rel.r_offset = got_address;
13049 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
13052 loc = srel->contents + plt_index * RELOC_SIZE (htab);
13053 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
13055 if (!h->def_regular)
13057 /* Mark the symbol as undefined, rather than as defined in
13058 the .plt section. Leave the value alone. */
13059 sym->st_shndx = SHN_UNDEF;
13060 /* If the symbol is weak, we do need to clear the value.
13061 Otherwise, the PLT entry would provide a definition for
13062 the symbol even if the symbol wasn't defined anywhere,
13063 and so the symbol would never be NULL. */
13064 if (!h->ref_regular_nonweak)
13072 Elf_Internal_Rela rel;
13074 /* This symbol needs a copy reloc. Set it up. */
13075 BFD_ASSERT (h->dynindx != -1
13076 && (h->root.type == bfd_link_hash_defined
13077 || h->root.type == bfd_link_hash_defweak));
13080 BFD_ASSERT (s != NULL);
13083 rel.r_offset = (h->root.u.def.value
13084 + h->root.u.def.section->output_section->vma
13085 + h->root.u.def.section->output_offset);
13086 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
13087 elf32_arm_add_dynreloc (output_bfd, info, s, &rel);
13090 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
13091 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
13092 to the ".got" section. */
13093 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
13094 || (!htab->vxworks_p && h == htab->root.hgot))
13095 sym->st_shndx = SHN_ABS;
13101 arm_put_trampoline (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
13103 const unsigned long *template, unsigned count)
13107 for (ix = 0; ix != count; ix++)
13109 unsigned long insn = template[ix];
13111 /* Emit mov pc,rx if bx is not permitted. */
13112 if (htab->fix_v4bx == 1 && (insn & 0x0ffffff0) == 0x012fff10)
13113 insn = (insn & 0xf000000f) | 0x01a0f000;
13114 put_arm_insn (htab, output_bfd, insn, (char *)contents + ix*4);
13118 /* Finish up the dynamic sections. */
13121 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
13126 struct elf32_arm_link_hash_table *htab;
13128 htab = elf32_arm_hash_table (info);
13132 dynobj = elf_hash_table (info)->dynobj;
13134 sgot = htab->root.sgotplt;
13135 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13137 if (elf_hash_table (info)->dynamic_sections_created)
13140 Elf32_External_Dyn *dyncon, *dynconend;
13142 splt = htab->root.splt;
13143 BFD_ASSERT (splt != NULL && sdyn != NULL);
13144 BFD_ASSERT (htab->symbian_p || sgot != NULL);
13146 dyncon = (Elf32_External_Dyn *) sdyn->contents;
13147 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
13149 for (; dyncon < dynconend; dyncon++)
13151 Elf_Internal_Dyn dyn;
13155 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
13162 if (htab->vxworks_p
13163 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
13164 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13169 goto get_vma_if_bpabi;
13172 goto get_vma_if_bpabi;
13175 goto get_vma_if_bpabi;
13177 name = ".gnu.version";
13178 goto get_vma_if_bpabi;
13180 name = ".gnu.version_d";
13181 goto get_vma_if_bpabi;
13183 name = ".gnu.version_r";
13184 goto get_vma_if_bpabi;
13190 name = RELOC_SECTION (htab, ".plt");
13192 s = bfd_get_section_by_name (output_bfd, name);
13193 BFD_ASSERT (s != NULL);
13194 if (!htab->symbian_p)
13195 dyn.d_un.d_ptr = s->vma;
13197 /* In the BPABI, tags in the PT_DYNAMIC section point
13198 at the file offset, not the memory address, for the
13199 convenience of the post linker. */
13200 dyn.d_un.d_ptr = s->filepos;
13201 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13205 if (htab->symbian_p)
13210 s = htab->root.srelplt;
13211 BFD_ASSERT (s != NULL);
13212 dyn.d_un.d_val = s->size;
13213 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13218 if (!htab->symbian_p)
13220 /* My reading of the SVR4 ABI indicates that the
13221 procedure linkage table relocs (DT_JMPREL) should be
13222 included in the overall relocs (DT_REL). This is
13223 what Solaris does. However, UnixWare can not handle
13224 that case. Therefore, we override the DT_RELSZ entry
13225 here to make it not include the JMPREL relocs. Since
13226 the linker script arranges for .rel(a).plt to follow all
13227 other relocation sections, we don't have to worry
13228 about changing the DT_REL entry. */
13229 s = htab->root.srelplt;
13231 dyn.d_un.d_val -= s->size;
13232 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13235 /* Fall through. */
13239 /* In the BPABI, the DT_REL tag must point at the file
13240 offset, not the VMA, of the first relocation
13241 section. So, we use code similar to that in
13242 elflink.c, but do not check for SHF_ALLOC on the
13243 relcoation section, since relocations sections are
13244 never allocated under the BPABI. The comments above
13245 about Unixware notwithstanding, we include all of the
13246 relocations here. */
13247 if (htab->symbian_p)
13250 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
13251 ? SHT_REL : SHT_RELA);
13252 dyn.d_un.d_val = 0;
13253 for (i = 1; i < elf_numsections (output_bfd); i++)
13255 Elf_Internal_Shdr *hdr
13256 = elf_elfsections (output_bfd)[i];
13257 if (hdr->sh_type == type)
13259 if (dyn.d_tag == DT_RELSZ
13260 || dyn.d_tag == DT_RELASZ)
13261 dyn.d_un.d_val += hdr->sh_size;
13262 else if ((ufile_ptr) hdr->sh_offset
13263 <= dyn.d_un.d_val - 1)
13264 dyn.d_un.d_val = hdr->sh_offset;
13267 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13271 case DT_TLSDESC_PLT:
13272 s = htab->root.splt;
13273 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
13274 + htab->dt_tlsdesc_plt);
13275 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13278 case DT_TLSDESC_GOT:
13279 s = htab->root.sgot;
13280 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
13281 + htab->dt_tlsdesc_got);
13282 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13285 /* Set the bottom bit of DT_INIT/FINI if the
13286 corresponding function is Thumb. */
13288 name = info->init_function;
13291 name = info->fini_function;
13293 /* If it wasn't set by elf_bfd_final_link
13294 then there is nothing to adjust. */
13295 if (dyn.d_un.d_val != 0)
13297 struct elf_link_hash_entry * eh;
13299 eh = elf_link_hash_lookup (elf_hash_table (info), name,
13300 FALSE, FALSE, TRUE);
13302 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
13304 dyn.d_un.d_val |= 1;
13305 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
13312 /* Fill in the first entry in the procedure linkage table. */
13313 if (splt->size > 0 && htab->plt_header_size)
13315 const bfd_vma *plt0_entry;
13316 bfd_vma got_address, plt_address, got_displacement;
13318 /* Calculate the addresses of the GOT and PLT. */
13319 got_address = sgot->output_section->vma + sgot->output_offset;
13320 plt_address = splt->output_section->vma + splt->output_offset;
13322 if (htab->vxworks_p)
13324 /* The VxWorks GOT is relocated by the dynamic linker.
13325 Therefore, we must emit relocations rather than simply
13326 computing the values now. */
13327 Elf_Internal_Rela rel;
13329 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
13330 put_arm_insn (htab, output_bfd, plt0_entry[0],
13331 splt->contents + 0);
13332 put_arm_insn (htab, output_bfd, plt0_entry[1],
13333 splt->contents + 4);
13334 put_arm_insn (htab, output_bfd, plt0_entry[2],
13335 splt->contents + 8);
13336 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
13338 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
13339 rel.r_offset = plt_address + 12;
13340 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
13342 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
13343 htab->srelplt2->contents);
13347 got_displacement = got_address - (plt_address + 16);
13349 plt0_entry = elf32_arm_plt0_entry;
13350 put_arm_insn (htab, output_bfd, plt0_entry[0],
13351 splt->contents + 0);
13352 put_arm_insn (htab, output_bfd, plt0_entry[1],
13353 splt->contents + 4);
13354 put_arm_insn (htab, output_bfd, plt0_entry[2],
13355 splt->contents + 8);
13356 put_arm_insn (htab, output_bfd, plt0_entry[3],
13357 splt->contents + 12);
13359 #ifdef FOUR_WORD_PLT
13360 /* The displacement value goes in the otherwise-unused
13361 last word of the second entry. */
13362 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
13364 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
13369 /* UnixWare sets the entsize of .plt to 4, although that doesn't
13370 really seem like the right value. */
13371 if (splt->output_section->owner == output_bfd)
13372 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
13374 if (htab->dt_tlsdesc_plt)
13376 bfd_vma got_address
13377 = sgot->output_section->vma + sgot->output_offset;
13378 bfd_vma gotplt_address = (htab->root.sgot->output_section->vma
13379 + htab->root.sgot->output_offset);
13380 bfd_vma plt_address
13381 = splt->output_section->vma + splt->output_offset;
13383 arm_put_trampoline (htab, output_bfd,
13384 splt->contents + htab->dt_tlsdesc_plt,
13385 dl_tlsdesc_lazy_trampoline, 6);
13387 bfd_put_32 (output_bfd,
13388 gotplt_address + htab->dt_tlsdesc_got
13389 - (plt_address + htab->dt_tlsdesc_plt)
13390 - dl_tlsdesc_lazy_trampoline[6],
13391 splt->contents + htab->dt_tlsdesc_plt + 24);
13392 bfd_put_32 (output_bfd,
13393 got_address - (plt_address + htab->dt_tlsdesc_plt)
13394 - dl_tlsdesc_lazy_trampoline[7],
13395 splt->contents + htab->dt_tlsdesc_plt + 24 + 4);
13398 if (htab->tls_trampoline)
13400 arm_put_trampoline (htab, output_bfd,
13401 splt->contents + htab->tls_trampoline,
13402 tls_trampoline, 3);
13403 #ifdef FOUR_WORD_PLT
13404 bfd_put_32 (output_bfd, 0x00000000,
13405 splt->contents + htab->tls_trampoline + 12);
13409 if (htab->vxworks_p && !info->shared && htab->root.splt->size > 0)
13411 /* Correct the .rel(a).plt.unloaded relocations. They will have
13412 incorrect symbol indexes. */
13416 num_plts = ((htab->root.splt->size - htab->plt_header_size)
13417 / htab->plt_entry_size);
13418 p = htab->srelplt2->contents + RELOC_SIZE (htab);
13420 for (; num_plts; num_plts--)
13422 Elf_Internal_Rela rel;
13424 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
13425 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
13426 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
13427 p += RELOC_SIZE (htab);
13429 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
13430 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
13431 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
13432 p += RELOC_SIZE (htab);
13437 /* Fill in the first three entries in the global offset table. */
13440 if (sgot->size > 0)
13443 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
13445 bfd_put_32 (output_bfd,
13446 sdyn->output_section->vma + sdyn->output_offset,
13448 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
13449 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
13452 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
13459 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
13461 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
13462 struct elf32_arm_link_hash_table *globals;
13464 i_ehdrp = elf_elfheader (abfd);
13466 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
13467 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
13469 i_ehdrp->e_ident[EI_OSABI] = 0;
13470 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
13474 globals = elf32_arm_hash_table (link_info);
13475 if (globals != NULL && globals->byteswap_code)
13476 i_ehdrp->e_flags |= EF_ARM_BE8;
13480 static enum elf_reloc_type_class
13481 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
13483 switch ((int) ELF32_R_TYPE (rela->r_info))
13485 case R_ARM_RELATIVE:
13486 return reloc_class_relative;
13487 case R_ARM_JUMP_SLOT:
13488 return reloc_class_plt;
13490 return reloc_class_copy;
13492 return reloc_class_normal;
13496 /* Set the right machine number for an Arm ELF file. */
13499 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
13501 if (hdr->sh_type == SHT_NOTE)
13502 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
13508 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
13510 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
13513 /* Return TRUE if this is an unwinding table entry. */
13516 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
13518 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
13519 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
13523 /* Set the type and flags for an ARM section. We do this by
13524 the section name, which is a hack, but ought to work. */
13527 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
13531 name = bfd_get_section_name (abfd, sec);
13533 if (is_arm_elf_unwind_section_name (abfd, name))
13535 hdr->sh_type = SHT_ARM_EXIDX;
13536 hdr->sh_flags |= SHF_LINK_ORDER;
13541 /* Handle an ARM specific section when reading an object file. This is
13542 called when bfd_section_from_shdr finds a section with an unknown
13546 elf32_arm_section_from_shdr (bfd *abfd,
13547 Elf_Internal_Shdr * hdr,
13551 /* There ought to be a place to keep ELF backend specific flags, but
13552 at the moment there isn't one. We just keep track of the
13553 sections by their name, instead. Fortunately, the ABI gives
13554 names for all the ARM specific sections, so we will probably get
13556 switch (hdr->sh_type)
13558 case SHT_ARM_EXIDX:
13559 case SHT_ARM_PREEMPTMAP:
13560 case SHT_ARM_ATTRIBUTES:
13567 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
13573 static _arm_elf_section_data *
13574 get_arm_elf_section_data (asection * sec)
13576 if (sec && sec->owner && is_arm_elf (sec->owner))
13577 return elf32_arm_section_data (sec);
13585 struct bfd_link_info *info;
13588 int (*func) (void *, const char *, Elf_Internal_Sym *,
13589 asection *, struct elf_link_hash_entry *);
13590 } output_arch_syminfo;
13592 enum map_symbol_type
13600 /* Output a single mapping symbol. */
13603 elf32_arm_output_map_sym (output_arch_syminfo *osi,
13604 enum map_symbol_type type,
13607 static const char *names[3] = {"$a", "$t", "$d"};
13608 Elf_Internal_Sym sym;
13610 sym.st_value = osi->sec->output_section->vma
13611 + osi->sec->output_offset
13615 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
13616 sym.st_shndx = osi->sec_shndx;
13617 elf32_arm_section_map_add (osi->sec, names[type][1], offset);
13618 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
13622 /* Output mapping symbols for PLT entries associated with H. */
13625 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
13627 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
13628 struct elf32_arm_link_hash_table *htab;
13629 struct elf32_arm_link_hash_entry *eh;
13632 if (h->root.type == bfd_link_hash_indirect)
13635 if (h->root.type == bfd_link_hash_warning)
13636 /* When warning symbols are created, they **replace** the "real"
13637 entry in the hash table, thus we never get to see the real
13638 symbol in a hash traversal. So look at it now. */
13639 h = (struct elf_link_hash_entry *) h->root.u.i.link;
13641 if (h->plt.offset == (bfd_vma) -1)
13644 htab = elf32_arm_hash_table (osi->info);
13648 eh = (struct elf32_arm_link_hash_entry *) h;
13649 addr = h->plt.offset;
13650 if (htab->symbian_p)
13652 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
13654 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
13657 else if (htab->vxworks_p)
13659 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
13661 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
13663 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
13665 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
13670 bfd_signed_vma thumb_refs;
13672 thumb_refs = eh->plt_thumb_refcount;
13673 if (!htab->use_blx)
13674 thumb_refs += eh->plt_maybe_thumb_refcount;
13676 if (thumb_refs > 0)
13678 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
13681 #ifdef FOUR_WORD_PLT
13682 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
13684 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
13687 /* A three-word PLT with no Thumb thunk contains only Arm code,
13688 so only need to output a mapping symbol for the first PLT entry and
13689 entries with thumb thunks. */
13690 if (thumb_refs > 0 || addr == 20)
13692 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
13701 /* Output a single local symbol for a generated stub. */
13704 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
13705 bfd_vma offset, bfd_vma size)
13707 Elf_Internal_Sym sym;
13709 sym.st_value = osi->sec->output_section->vma
13710 + osi->sec->output_offset
13712 sym.st_size = size;
13714 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
13715 sym.st_shndx = osi->sec_shndx;
13716 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
13720 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
13723 struct elf32_arm_stub_hash_entry *stub_entry;
13724 asection *stub_sec;
13727 output_arch_syminfo *osi;
13728 const insn_sequence *template_sequence;
13729 enum stub_insn_type prev_type;
13732 enum map_symbol_type sym_type;
13734 /* Massage our args to the form they really have. */
13735 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
13736 osi = (output_arch_syminfo *) in_arg;
13738 stub_sec = stub_entry->stub_sec;
13740 /* Ensure this stub is attached to the current section being
13742 if (stub_sec != osi->sec)
13745 addr = (bfd_vma) stub_entry->stub_offset;
13746 stub_name = stub_entry->output_name;
13748 template_sequence = stub_entry->stub_template;
13749 switch (template_sequence[0].type)
13752 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, stub_entry->stub_size))
13757 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1,
13758 stub_entry->stub_size))
13766 prev_type = DATA_TYPE;
13768 for (i = 0; i < stub_entry->stub_template_size; i++)
13770 switch (template_sequence[i].type)
13773 sym_type = ARM_MAP_ARM;
13778 sym_type = ARM_MAP_THUMB;
13782 sym_type = ARM_MAP_DATA;
13790 if (template_sequence[i].type != prev_type)
13792 prev_type = template_sequence[i].type;
13793 if (!elf32_arm_output_map_sym (osi, sym_type, addr + size))
13797 switch (template_sequence[i].type)
13821 /* Output mapping symbols for linker generated sections,
13822 and for those data-only sections that do not have a
13826 elf32_arm_output_arch_local_syms (bfd *output_bfd,
13827 struct bfd_link_info *info,
13829 int (*func) (void *, const char *,
13830 Elf_Internal_Sym *,
13832 struct elf_link_hash_entry *))
13834 output_arch_syminfo osi;
13835 struct elf32_arm_link_hash_table *htab;
13837 bfd_size_type size;
13840 htab = elf32_arm_hash_table (info);
13844 check_use_blx (htab);
13850 /* Add a $d mapping symbol to data-only sections that
13851 don't have any mapping symbol. This may result in (harmless) redundant
13852 mapping symbols. */
13853 for (input_bfd = info->input_bfds;
13855 input_bfd = input_bfd->link_next)
13857 if ((input_bfd->flags & (BFD_LINKER_CREATED | HAS_SYMS)) == HAS_SYMS)
13858 for (osi.sec = input_bfd->sections;
13860 osi.sec = osi.sec->next)
13862 if (osi.sec->output_section != NULL
13863 && ((osi.sec->output_section->flags & (SEC_ALLOC | SEC_CODE))
13865 && (osi.sec->flags & (SEC_HAS_CONTENTS | SEC_LINKER_CREATED))
13866 == SEC_HAS_CONTENTS
13867 && get_arm_elf_section_data (osi.sec) != NULL
13868 && get_arm_elf_section_data (osi.sec)->mapcount == 0
13869 && osi.sec->size > 0)
13871 osi.sec_shndx = _bfd_elf_section_from_bfd_section
13872 (output_bfd, osi.sec->output_section);
13873 if (osi.sec_shndx != (int)SHN_BAD)
13874 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 0);
13879 /* ARM->Thumb glue. */
13880 if (htab->arm_glue_size > 0)
13882 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
13883 ARM2THUMB_GLUE_SECTION_NAME);
13885 osi.sec_shndx = _bfd_elf_section_from_bfd_section
13886 (output_bfd, osi.sec->output_section);
13887 if (info->shared || htab->root.is_relocatable_executable
13888 || htab->pic_veneer)
13889 size = ARM2THUMB_PIC_GLUE_SIZE;
13890 else if (htab->use_blx)
13891 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
13893 size = ARM2THUMB_STATIC_GLUE_SIZE;
13895 for (offset = 0; offset < htab->arm_glue_size; offset += size)
13897 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
13898 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
13902 /* Thumb->ARM glue. */
13903 if (htab->thumb_glue_size > 0)
13905 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
13906 THUMB2ARM_GLUE_SECTION_NAME);
13908 osi.sec_shndx = _bfd_elf_section_from_bfd_section
13909 (output_bfd, osi.sec->output_section);
13910 size = THUMB2ARM_GLUE_SIZE;
13912 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
13914 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
13915 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
13919 /* ARMv4 BX veneers. */
13920 if (htab->bx_glue_size > 0)
13922 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
13923 ARM_BX_GLUE_SECTION_NAME);
13925 osi.sec_shndx = _bfd_elf_section_from_bfd_section
13926 (output_bfd, osi.sec->output_section);
13928 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
13931 /* Long calls stubs. */
13932 if (htab->stub_bfd && htab->stub_bfd->sections)
13934 asection* stub_sec;
13936 for (stub_sec = htab->stub_bfd->sections;
13938 stub_sec = stub_sec->next)
13940 /* Ignore non-stub sections. */
13941 if (!strstr (stub_sec->name, STUB_SUFFIX))
13944 osi.sec = stub_sec;
13946 osi.sec_shndx = _bfd_elf_section_from_bfd_section
13947 (output_bfd, osi.sec->output_section);
13949 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
13953 /* Finally, output mapping symbols for the PLT. */
13954 if (!htab->root.splt || htab->root.splt->size == 0)
13957 osi.sec = htab->root.splt;
13958 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
13959 osi.sec->output_section);
13960 /* Output mapping symbols for the plt header. SymbianOS does not have a
13962 if (htab->vxworks_p)
13964 /* VxWorks shared libraries have no PLT header. */
13967 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
13969 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
13973 else if (!htab->symbian_p)
13975 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
13977 #ifndef FOUR_WORD_PLT
13978 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
13983 if (htab->dt_tlsdesc_plt != 0)
13985 /* Mapping symbols for the lazy tls trampoline. */
13986 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->dt_tlsdesc_plt))
13989 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
13990 htab->dt_tlsdesc_plt + 24))
13993 if (htab->tls_trampoline != 0)
13995 /* Mapping symbols for the tls trampoline. */
13996 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->tls_trampoline))
13998 #ifdef FOUR_WORD_PLT
13999 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
14000 htab->tls_trampoline + 12))
14005 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
14009 /* Allocate target specific section data. */
14012 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
14014 if (!sec->used_by_bfd)
14016 _arm_elf_section_data *sdata;
14017 bfd_size_type amt = sizeof (*sdata);
14019 sdata = (_arm_elf_section_data *) bfd_zalloc (abfd, amt);
14022 sec->used_by_bfd = sdata;
14025 return _bfd_elf_new_section_hook (abfd, sec);
14029 /* Used to order a list of mapping symbols by address. */
14032 elf32_arm_compare_mapping (const void * a, const void * b)
14034 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
14035 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
14037 if (amap->vma > bmap->vma)
14039 else if (amap->vma < bmap->vma)
14041 else if (amap->type > bmap->type)
14042 /* Ensure results do not depend on the host qsort for objects with
14043 multiple mapping symbols at the same address by sorting on type
14046 else if (amap->type < bmap->type)
14052 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
14054 static unsigned long
14055 offset_prel31 (unsigned long addr, bfd_vma offset)
14057 return (addr & ~0x7ffffffful) | ((addr + offset) & 0x7ffffffful);
14060 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
14064 copy_exidx_entry (bfd *output_bfd, bfd_byte *to, bfd_byte *from, bfd_vma offset)
14066 unsigned long first_word = bfd_get_32 (output_bfd, from);
14067 unsigned long second_word = bfd_get_32 (output_bfd, from + 4);
14069 /* High bit of first word is supposed to be zero. */
14070 if ((first_word & 0x80000000ul) == 0)
14071 first_word = offset_prel31 (first_word, offset);
14073 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
14074 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
14075 if ((second_word != 0x1) && ((second_word & 0x80000000ul) == 0))
14076 second_word = offset_prel31 (second_word, offset);
14078 bfd_put_32 (output_bfd, first_word, to);
14079 bfd_put_32 (output_bfd, second_word, to + 4);
14082 /* Data for make_branch_to_a8_stub(). */
14084 struct a8_branch_to_stub_data {
14085 asection *writing_section;
14086 bfd_byte *contents;
14090 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
14091 places for a particular section. */
14094 make_branch_to_a8_stub (struct bfd_hash_entry *gen_entry,
14097 struct elf32_arm_stub_hash_entry *stub_entry;
14098 struct a8_branch_to_stub_data *data;
14099 bfd_byte *contents;
14100 unsigned long branch_insn;
14101 bfd_vma veneered_insn_loc, veneer_entry_loc;
14102 bfd_signed_vma branch_offset;
14104 unsigned int target;
14106 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
14107 data = (struct a8_branch_to_stub_data *) in_arg;
14109 if (stub_entry->target_section != data->writing_section
14110 || stub_entry->stub_type < arm_stub_a8_veneer_lwm)
14113 contents = data->contents;
14115 veneered_insn_loc = stub_entry->target_section->output_section->vma
14116 + stub_entry->target_section->output_offset
14117 + stub_entry->target_value;
14119 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
14120 + stub_entry->stub_sec->output_offset
14121 + stub_entry->stub_offset;
14123 if (stub_entry->stub_type == arm_stub_a8_veneer_blx)
14124 veneered_insn_loc &= ~3u;
14126 branch_offset = veneer_entry_loc - veneered_insn_loc - 4;
14128 abfd = stub_entry->target_section->owner;
14129 target = stub_entry->target_value;
14131 /* We attempt to avoid this condition by setting stubs_always_after_branch
14132 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
14133 This check is just to be on the safe side... */
14134 if ((veneered_insn_loc & ~0xfff) == (veneer_entry_loc & ~0xfff))
14136 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub is "
14137 "allocated in unsafe location"), abfd);
14141 switch (stub_entry->stub_type)
14143 case arm_stub_a8_veneer_b:
14144 case arm_stub_a8_veneer_b_cond:
14145 branch_insn = 0xf0009000;
14148 case arm_stub_a8_veneer_blx:
14149 branch_insn = 0xf000e800;
14152 case arm_stub_a8_veneer_bl:
14154 unsigned int i1, j1, i2, j2, s;
14156 branch_insn = 0xf000d000;
14159 if (branch_offset < -16777216 || branch_offset > 16777214)
14161 /* There's not much we can do apart from complain if this
14163 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub out "
14164 "of range (input file too large)"), abfd);
14168 /* i1 = not(j1 eor s), so:
14170 j1 = (not i1) eor s. */
14172 branch_insn |= (branch_offset >> 1) & 0x7ff;
14173 branch_insn |= ((branch_offset >> 12) & 0x3ff) << 16;
14174 i2 = (branch_offset >> 22) & 1;
14175 i1 = (branch_offset >> 23) & 1;
14176 s = (branch_offset >> 24) & 1;
14179 branch_insn |= j2 << 11;
14180 branch_insn |= j1 << 13;
14181 branch_insn |= s << 26;
14190 bfd_put_16 (abfd, (branch_insn >> 16) & 0xffff, &contents[target]);
14191 bfd_put_16 (abfd, branch_insn & 0xffff, &contents[target + 2]);
14196 /* Do code byteswapping. Return FALSE afterwards so that the section is
14197 written out as normal. */
14200 elf32_arm_write_section (bfd *output_bfd,
14201 struct bfd_link_info *link_info,
14203 bfd_byte *contents)
14205 unsigned int mapcount, errcount;
14206 _arm_elf_section_data *arm_data;
14207 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
14208 elf32_arm_section_map *map;
14209 elf32_vfp11_erratum_list *errnode;
14212 bfd_vma offset = sec->output_section->vma + sec->output_offset;
14216 if (globals == NULL)
14219 /* If this section has not been allocated an _arm_elf_section_data
14220 structure then we cannot record anything. */
14221 arm_data = get_arm_elf_section_data (sec);
14222 if (arm_data == NULL)
14225 mapcount = arm_data->mapcount;
14226 map = arm_data->map;
14227 errcount = arm_data->erratumcount;
14231 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
14233 for (errnode = arm_data->erratumlist; errnode != 0;
14234 errnode = errnode->next)
14236 bfd_vma target = errnode->vma - offset;
14238 switch (errnode->type)
14240 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
14242 bfd_vma branch_to_veneer;
14243 /* Original condition code of instruction, plus bit mask for
14244 ARM B instruction. */
14245 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
14248 /* The instruction is before the label. */
14251 /* Above offset included in -4 below. */
14252 branch_to_veneer = errnode->u.b.veneer->vma
14253 - errnode->vma - 4;
14255 if ((signed) branch_to_veneer < -(1 << 25)
14256 || (signed) branch_to_veneer >= (1 << 25))
14257 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
14258 "range"), output_bfd);
14260 insn |= (branch_to_veneer >> 2) & 0xffffff;
14261 contents[endianflip ^ target] = insn & 0xff;
14262 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
14263 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
14264 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
14268 case VFP11_ERRATUM_ARM_VENEER:
14270 bfd_vma branch_from_veneer;
14273 /* Take size of veneer into account. */
14274 branch_from_veneer = errnode->u.v.branch->vma
14275 - errnode->vma - 12;
14277 if ((signed) branch_from_veneer < -(1 << 25)
14278 || (signed) branch_from_veneer >= (1 << 25))
14279 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
14280 "range"), output_bfd);
14282 /* Original instruction. */
14283 insn = errnode->u.v.branch->u.b.vfp_insn;
14284 contents[endianflip ^ target] = insn & 0xff;
14285 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
14286 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
14287 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
14289 /* Branch back to insn after original insn. */
14290 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
14291 contents[endianflip ^ (target + 4)] = insn & 0xff;
14292 contents[endianflip ^ (target + 5)] = (insn >> 8) & 0xff;
14293 contents[endianflip ^ (target + 6)] = (insn >> 16) & 0xff;
14294 contents[endianflip ^ (target + 7)] = (insn >> 24) & 0xff;
14304 if (arm_data->elf.this_hdr.sh_type == SHT_ARM_EXIDX)
14306 arm_unwind_table_edit *edit_node
14307 = arm_data->u.exidx.unwind_edit_list;
14308 /* Now, sec->size is the size of the section we will write. The original
14309 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
14310 markers) was sec->rawsize. (This isn't the case if we perform no
14311 edits, then rawsize will be zero and we should use size). */
14312 bfd_byte *edited_contents = (bfd_byte *) bfd_malloc (sec->size);
14313 unsigned int input_size = sec->rawsize ? sec->rawsize : sec->size;
14314 unsigned int in_index, out_index;
14315 bfd_vma add_to_offsets = 0;
14317 for (in_index = 0, out_index = 0; in_index * 8 < input_size || edit_node;)
14321 unsigned int edit_index = edit_node->index;
14323 if (in_index < edit_index && in_index * 8 < input_size)
14325 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
14326 contents + in_index * 8, add_to_offsets);
14330 else if (in_index == edit_index
14331 || (in_index * 8 >= input_size
14332 && edit_index == UINT_MAX))
14334 switch (edit_node->type)
14336 case DELETE_EXIDX_ENTRY:
14338 add_to_offsets += 8;
14341 case INSERT_EXIDX_CANTUNWIND_AT_END:
14343 asection *text_sec = edit_node->linked_section;
14344 bfd_vma text_offset = text_sec->output_section->vma
14345 + text_sec->output_offset
14347 bfd_vma exidx_offset = offset + out_index * 8;
14348 unsigned long prel31_offset;
14350 /* Note: this is meant to be equivalent to an
14351 R_ARM_PREL31 relocation. These synthetic
14352 EXIDX_CANTUNWIND markers are not relocated by the
14353 usual BFD method. */
14354 prel31_offset = (text_offset - exidx_offset)
14357 /* First address we can't unwind. */
14358 bfd_put_32 (output_bfd, prel31_offset,
14359 &edited_contents[out_index * 8]);
14361 /* Code for EXIDX_CANTUNWIND. */
14362 bfd_put_32 (output_bfd, 0x1,
14363 &edited_contents[out_index * 8 + 4]);
14366 add_to_offsets -= 8;
14371 edit_node = edit_node->next;
14376 /* No more edits, copy remaining entries verbatim. */
14377 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
14378 contents + in_index * 8, add_to_offsets);
14384 if (!(sec->flags & SEC_EXCLUDE) && !(sec->flags & SEC_NEVER_LOAD))
14385 bfd_set_section_contents (output_bfd, sec->output_section,
14387 (file_ptr) sec->output_offset, sec->size);
14392 /* Fix code to point to Cortex-A8 erratum stubs. */
14393 if (globals->fix_cortex_a8)
14395 struct a8_branch_to_stub_data data;
14397 data.writing_section = sec;
14398 data.contents = contents;
14400 bfd_hash_traverse (&globals->stub_hash_table, make_branch_to_a8_stub,
14407 if (globals->byteswap_code)
14409 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
14412 for (i = 0; i < mapcount; i++)
14414 if (i == mapcount - 1)
14417 end = map[i + 1].vma;
14419 switch (map[i].type)
14422 /* Byte swap code words. */
14423 while (ptr + 3 < end)
14425 tmp = contents[ptr];
14426 contents[ptr] = contents[ptr + 3];
14427 contents[ptr + 3] = tmp;
14428 tmp = contents[ptr + 1];
14429 contents[ptr + 1] = contents[ptr + 2];
14430 contents[ptr + 2] = tmp;
14436 /* Byte swap code halfwords. */
14437 while (ptr + 1 < end)
14439 tmp = contents[ptr];
14440 contents[ptr] = contents[ptr + 1];
14441 contents[ptr + 1] = tmp;
14447 /* Leave data alone. */
14455 arm_data->mapcount = -1;
14456 arm_data->mapsize = 0;
14457 arm_data->map = NULL;
14462 /* Display STT_ARM_TFUNC symbols as functions. */
14465 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
14468 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
14470 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
14471 elfsym->symbol.flags |= BSF_FUNCTION;
14475 /* Mangle thumb function symbols as we read them in. */
14478 elf32_arm_swap_symbol_in (bfd * abfd,
14481 Elf_Internal_Sym *dst)
14483 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
14486 /* New EABI objects mark thumb function symbols by setting the low bit of
14487 the address. Turn these into STT_ARM_TFUNC. */
14488 if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC)
14489 && (dst->st_value & 1))
14491 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
14492 dst->st_value &= ~(bfd_vma) 1;
14498 /* Mangle thumb function symbols as we write them out. */
14501 elf32_arm_swap_symbol_out (bfd *abfd,
14502 const Elf_Internal_Sym *src,
14506 Elf_Internal_Sym newsym;
14508 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
14509 of the address set, as per the new EABI. We do this unconditionally
14510 because objcopy does not set the elf header flags until after
14511 it writes out the symbol table. */
14512 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
14515 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
14516 if (newsym.st_shndx != SHN_UNDEF)
14518 /* Do this only for defined symbols. At link type, the static
14519 linker will simulate the work of dynamic linker of resolving
14520 symbols and will carry over the thumbness of found symbols to
14521 the output symbol table. It's not clear how it happens, but
14522 the thumbness of undefined symbols can well be different at
14523 runtime, and writing '1' for them will be confusing for users
14524 and possibly for dynamic linker itself.
14526 newsym.st_value |= 1;
14531 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
14534 /* Add the PT_ARM_EXIDX program header. */
14537 elf32_arm_modify_segment_map (bfd *abfd,
14538 struct bfd_link_info *info ATTRIBUTE_UNUSED)
14540 struct elf_segment_map *m;
14543 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
14544 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
14546 /* If there is already a PT_ARM_EXIDX header, then we do not
14547 want to add another one. This situation arises when running
14548 "strip"; the input binary already has the header. */
14549 m = elf_tdata (abfd)->segment_map;
14550 while (m && m->p_type != PT_ARM_EXIDX)
14554 m = (struct elf_segment_map *)
14555 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
14558 m->p_type = PT_ARM_EXIDX;
14560 m->sections[0] = sec;
14562 m->next = elf_tdata (abfd)->segment_map;
14563 elf_tdata (abfd)->segment_map = m;
14570 /* We may add a PT_ARM_EXIDX program header. */
14573 elf32_arm_additional_program_headers (bfd *abfd,
14574 struct bfd_link_info *info ATTRIBUTE_UNUSED)
14578 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
14579 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
14585 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
14588 elf32_arm_is_function_type (unsigned int type)
14590 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
14593 /* We use this to override swap_symbol_in and swap_symbol_out. */
14594 const struct elf_size_info elf32_arm_size_info =
14596 sizeof (Elf32_External_Ehdr),
14597 sizeof (Elf32_External_Phdr),
14598 sizeof (Elf32_External_Shdr),
14599 sizeof (Elf32_External_Rel),
14600 sizeof (Elf32_External_Rela),
14601 sizeof (Elf32_External_Sym),
14602 sizeof (Elf32_External_Dyn),
14603 sizeof (Elf_External_Note),
14607 ELFCLASS32, EV_CURRENT,
14608 bfd_elf32_write_out_phdrs,
14609 bfd_elf32_write_shdrs_and_ehdr,
14610 bfd_elf32_checksum_contents,
14611 bfd_elf32_write_relocs,
14612 elf32_arm_swap_symbol_in,
14613 elf32_arm_swap_symbol_out,
14614 bfd_elf32_slurp_reloc_table,
14615 bfd_elf32_slurp_symbol_table,
14616 bfd_elf32_swap_dyn_in,
14617 bfd_elf32_swap_dyn_out,
14618 bfd_elf32_swap_reloc_in,
14619 bfd_elf32_swap_reloc_out,
14620 bfd_elf32_swap_reloca_in,
14621 bfd_elf32_swap_reloca_out
14624 #define ELF_ARCH bfd_arch_arm
14625 #define ELF_TARGET_ID ARM_ELF_DATA
14626 #define ELF_MACHINE_CODE EM_ARM
14627 #ifdef __QNXTARGET__
14628 #define ELF_MAXPAGESIZE 0x1000
14630 #define ELF_MAXPAGESIZE 0x8000
14632 #define ELF_MINPAGESIZE 0x1000
14633 #define ELF_COMMONPAGESIZE 0x1000
14635 #define bfd_elf32_mkobject elf32_arm_mkobject
14637 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
14638 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
14639 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
14640 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
14641 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
14642 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
14643 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
14644 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
14645 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
14646 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
14647 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
14648 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
14649 #define bfd_elf32_bfd_final_link elf32_arm_final_link
14651 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
14652 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
14653 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
14654 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
14655 #define elf_backend_check_relocs elf32_arm_check_relocs
14656 #define elf_backend_relocate_section elf32_arm_relocate_section
14657 #define elf_backend_write_section elf32_arm_write_section
14658 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
14659 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
14660 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
14661 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
14662 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
14663 #define elf_backend_always_size_sections elf32_arm_always_size_sections
14664 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
14665 #define elf_backend_post_process_headers elf32_arm_post_process_headers
14666 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
14667 #define elf_backend_object_p elf32_arm_object_p
14668 #define elf_backend_section_flags elf32_arm_section_flags
14669 #define elf_backend_fake_sections elf32_arm_fake_sections
14670 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
14671 #define elf_backend_final_write_processing elf32_arm_final_write_processing
14672 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
14673 #define elf_backend_symbol_processing elf32_arm_symbol_processing
14674 #define elf_backend_size_info elf32_arm_size_info
14675 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
14676 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
14677 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
14678 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
14679 #define elf_backend_is_function_type elf32_arm_is_function_type
14681 #define elf_backend_can_refcount 1
14682 #define elf_backend_can_gc_sections 1
14683 #define elf_backend_plt_readonly 1
14684 #define elf_backend_want_got_plt 1
14685 #define elf_backend_want_plt_sym 0
14686 #define elf_backend_may_use_rel_p 1
14687 #define elf_backend_may_use_rela_p 0
14688 #define elf_backend_default_use_rela_p 0
14690 #define elf_backend_got_header_size 12
14692 #undef elf_backend_obj_attrs_vendor
14693 #define elf_backend_obj_attrs_vendor "aeabi"
14694 #undef elf_backend_obj_attrs_section
14695 #define elf_backend_obj_attrs_section ".ARM.attributes"
14696 #undef elf_backend_obj_attrs_arg_type
14697 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
14698 #undef elf_backend_obj_attrs_section_type
14699 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
14700 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
14701 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
14703 #include "elf32-target.h"
14705 /* VxWorks Targets. */
14707 #undef TARGET_LITTLE_SYM
14708 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
14709 #undef TARGET_LITTLE_NAME
14710 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
14711 #undef TARGET_BIG_SYM
14712 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
14713 #undef TARGET_BIG_NAME
14714 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
14716 /* Like elf32_arm_link_hash_table_create -- but overrides
14717 appropriately for VxWorks. */
14719 static struct bfd_link_hash_table *
14720 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
14722 struct bfd_link_hash_table *ret;
14724 ret = elf32_arm_link_hash_table_create (abfd);
14727 struct elf32_arm_link_hash_table *htab
14728 = (struct elf32_arm_link_hash_table *) ret;
14730 htab->vxworks_p = 1;
14736 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
14738 elf32_arm_final_write_processing (abfd, linker);
14739 elf_vxworks_final_write_processing (abfd, linker);
14743 #define elf32_bed elf32_arm_vxworks_bed
14745 #undef bfd_elf32_bfd_link_hash_table_create
14746 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
14747 #undef elf_backend_add_symbol_hook
14748 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
14749 #undef elf_backend_final_write_processing
14750 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
14751 #undef elf_backend_emit_relocs
14752 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
14754 #undef elf_backend_may_use_rel_p
14755 #define elf_backend_may_use_rel_p 0
14756 #undef elf_backend_may_use_rela_p
14757 #define elf_backend_may_use_rela_p 1
14758 #undef elf_backend_default_use_rela_p
14759 #define elf_backend_default_use_rela_p 1
14760 #undef elf_backend_want_plt_sym
14761 #define elf_backend_want_plt_sym 1
14762 #undef ELF_MAXPAGESIZE
14763 #define ELF_MAXPAGESIZE 0x1000
14765 #include "elf32-target.h"
14768 /* Merge backend specific data from an object file to the output
14769 object file when linking. */
14772 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
14774 flagword out_flags;
14776 bfd_boolean flags_compatible = TRUE;
14779 /* Check if we have the same endianess. */
14780 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
14783 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
14786 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
14789 /* The input BFD must have had its flags initialised. */
14790 /* The following seems bogus to me -- The flags are initialized in
14791 the assembler but I don't think an elf_flags_init field is
14792 written into the object. */
14793 /* BFD_ASSERT (elf_flags_init (ibfd)); */
14795 in_flags = elf_elfheader (ibfd)->e_flags;
14796 out_flags = elf_elfheader (obfd)->e_flags;
14798 /* In theory there is no reason why we couldn't handle this. However
14799 in practice it isn't even close to working and there is no real
14800 reason to want it. */
14801 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
14802 && !(ibfd->flags & DYNAMIC)
14803 && (in_flags & EF_ARM_BE8))
14805 _bfd_error_handler (_("error: %B is already in final BE8 format"),
14810 if (!elf_flags_init (obfd))
14812 /* If the input is the default architecture and had the default
14813 flags then do not bother setting the flags for the output
14814 architecture, instead allow future merges to do this. If no
14815 future merges ever set these flags then they will retain their
14816 uninitialised values, which surprise surprise, correspond
14817 to the default values. */
14818 if (bfd_get_arch_info (ibfd)->the_default
14819 && elf_elfheader (ibfd)->e_flags == 0)
14822 elf_flags_init (obfd) = TRUE;
14823 elf_elfheader (obfd)->e_flags = in_flags;
14825 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
14826 && bfd_get_arch_info (obfd)->the_default)
14827 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
14832 /* Determine what should happen if the input ARM architecture
14833 does not match the output ARM architecture. */
14834 if (! bfd_arm_merge_machines (ibfd, obfd))
14837 /* Identical flags must be compatible. */
14838 if (in_flags == out_flags)
14841 /* Check to see if the input BFD actually contains any sections. If
14842 not, its flags may not have been initialised either, but it
14843 cannot actually cause any incompatiblity. Do not short-circuit
14844 dynamic objects; their section list may be emptied by
14845 elf_link_add_object_symbols.
14847 Also check to see if there are no code sections in the input.
14848 In this case there is no need to check for code specific flags.
14849 XXX - do we need to worry about floating-point format compatability
14850 in data sections ? */
14851 if (!(ibfd->flags & DYNAMIC))
14853 bfd_boolean null_input_bfd = TRUE;
14854 bfd_boolean only_data_sections = TRUE;
14856 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
14858 /* Ignore synthetic glue sections. */
14859 if (strcmp (sec->name, ".glue_7")
14860 && strcmp (sec->name, ".glue_7t"))
14862 if ((bfd_get_section_flags (ibfd, sec)
14863 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
14864 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
14865 only_data_sections = FALSE;
14867 null_input_bfd = FALSE;
14872 if (null_input_bfd || only_data_sections)
14876 /* Complain about various flag mismatches. */
14877 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
14878 EF_ARM_EABI_VERSION (out_flags)))
14881 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
14883 (in_flags & EF_ARM_EABIMASK) >> 24,
14884 (out_flags & EF_ARM_EABIMASK) >> 24);
14888 /* Not sure what needs to be checked for EABI versions >= 1. */
14889 /* VxWorks libraries do not use these flags. */
14890 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
14891 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
14892 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
14894 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
14897 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
14899 in_flags & EF_ARM_APCS_26 ? 26 : 32,
14900 out_flags & EF_ARM_APCS_26 ? 26 : 32);
14901 flags_compatible = FALSE;
14904 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
14906 if (in_flags & EF_ARM_APCS_FLOAT)
14908 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
14912 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
14915 flags_compatible = FALSE;
14918 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
14920 if (in_flags & EF_ARM_VFP_FLOAT)
14922 (_("error: %B uses VFP instructions, whereas %B does not"),
14926 (_("error: %B uses FPA instructions, whereas %B does not"),
14929 flags_compatible = FALSE;
14932 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
14934 if (in_flags & EF_ARM_MAVERICK_FLOAT)
14936 (_("error: %B uses Maverick instructions, whereas %B does not"),
14940 (_("error: %B does not use Maverick instructions, whereas %B does"),
14943 flags_compatible = FALSE;
14946 #ifdef EF_ARM_SOFT_FLOAT
14947 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
14949 /* We can allow interworking between code that is VFP format
14950 layout, and uses either soft float or integer regs for
14951 passing floating point arguments and results. We already
14952 know that the APCS_FLOAT flags match; similarly for VFP
14954 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
14955 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
14957 if (in_flags & EF_ARM_SOFT_FLOAT)
14959 (_("error: %B uses software FP, whereas %B uses hardware FP"),
14963 (_("error: %B uses hardware FP, whereas %B uses software FP"),
14966 flags_compatible = FALSE;
14971 /* Interworking mismatch is only a warning. */
14972 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
14974 if (in_flags & EF_ARM_INTERWORK)
14977 (_("Warning: %B supports interworking, whereas %B does not"),
14983 (_("Warning: %B does not support interworking, whereas %B does"),
14989 return flags_compatible;
14993 /* Symbian OS Targets. */
14995 #undef TARGET_LITTLE_SYM
14996 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
14997 #undef TARGET_LITTLE_NAME
14998 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
14999 #undef TARGET_BIG_SYM
15000 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
15001 #undef TARGET_BIG_NAME
15002 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
15004 /* Like elf32_arm_link_hash_table_create -- but overrides
15005 appropriately for Symbian OS. */
15007 static struct bfd_link_hash_table *
15008 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
15010 struct bfd_link_hash_table *ret;
15012 ret = elf32_arm_link_hash_table_create (abfd);
15015 struct elf32_arm_link_hash_table *htab
15016 = (struct elf32_arm_link_hash_table *)ret;
15017 /* There is no PLT header for Symbian OS. */
15018 htab->plt_header_size = 0;
15019 /* The PLT entries are each one instruction and one word. */
15020 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
15021 htab->symbian_p = 1;
15022 /* Symbian uses armv5t or above, so use_blx is always true. */
15024 htab->root.is_relocatable_executable = 1;
15029 static const struct bfd_elf_special_section
15030 elf32_arm_symbian_special_sections[] =
15032 /* In a BPABI executable, the dynamic linking sections do not go in
15033 the loadable read-only segment. The post-linker may wish to
15034 refer to these sections, but they are not part of the final
15036 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
15037 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
15038 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
15039 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
15040 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
15041 /* These sections do not need to be writable as the SymbianOS
15042 postlinker will arrange things so that no dynamic relocation is
15044 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
15045 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
15046 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
15047 { NULL, 0, 0, 0, 0 }
15051 elf32_arm_symbian_begin_write_processing (bfd *abfd,
15052 struct bfd_link_info *link_info)
15054 /* BPABI objects are never loaded directly by an OS kernel; they are
15055 processed by a postlinker first, into an OS-specific format. If
15056 the D_PAGED bit is set on the file, BFD will align segments on
15057 page boundaries, so that an OS can directly map the file. With
15058 BPABI objects, that just results in wasted space. In addition,
15059 because we clear the D_PAGED bit, map_sections_to_segments will
15060 recognize that the program headers should not be mapped into any
15061 loadable segment. */
15062 abfd->flags &= ~D_PAGED;
15063 elf32_arm_begin_write_processing (abfd, link_info);
15067 elf32_arm_symbian_modify_segment_map (bfd *abfd,
15068 struct bfd_link_info *info)
15070 struct elf_segment_map *m;
15073 /* BPABI shared libraries and executables should have a PT_DYNAMIC
15074 segment. However, because the .dynamic section is not marked
15075 with SEC_LOAD, the generic ELF code will not create such a
15077 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
15080 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
15081 if (m->p_type == PT_DYNAMIC)
15086 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
15087 m->next = elf_tdata (abfd)->segment_map;
15088 elf_tdata (abfd)->segment_map = m;
15092 /* Also call the generic arm routine. */
15093 return elf32_arm_modify_segment_map (abfd, info);
15096 /* Return address for Ith PLT stub in section PLT, for relocation REL
15097 or (bfd_vma) -1 if it should not be included. */
15100 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
15101 const arelent *rel ATTRIBUTE_UNUSED)
15103 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
15108 #define elf32_bed elf32_arm_symbian_bed
15110 /* The dynamic sections are not allocated on SymbianOS; the postlinker
15111 will process them and then discard them. */
15112 #undef ELF_DYNAMIC_SEC_FLAGS
15113 #define ELF_DYNAMIC_SEC_FLAGS \
15114 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
15116 #undef elf_backend_add_symbol_hook
15117 #undef elf_backend_emit_relocs
15119 #undef bfd_elf32_bfd_link_hash_table_create
15120 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
15121 #undef elf_backend_special_sections
15122 #define elf_backend_special_sections elf32_arm_symbian_special_sections
15123 #undef elf_backend_begin_write_processing
15124 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
15125 #undef elf_backend_final_write_processing
15126 #define elf_backend_final_write_processing elf32_arm_final_write_processing
15128 #undef elf_backend_modify_segment_map
15129 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
15131 /* There is no .got section for BPABI objects, and hence no header. */
15132 #undef elf_backend_got_header_size
15133 #define elf_backend_got_header_size 0
15135 /* Similarly, there is no .got.plt section. */
15136 #undef elf_backend_want_got_plt
15137 #define elf_backend_want_got_plt 0
15139 #undef elf_backend_plt_sym_val
15140 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
15142 #undef elf_backend_may_use_rel_p
15143 #define elf_backend_may_use_rel_p 1
15144 #undef elf_backend_may_use_rela_p
15145 #define elf_backend_may_use_rela_p 0
15146 #undef elf_backend_default_use_rela_p
15147 #define elf_backend_default_use_rela_p 0
15148 #undef elf_backend_want_plt_sym
15149 #define elf_backend_want_plt_sym 0
15150 #undef ELF_MAXPAGESIZE
15151 #define ELF_MAXPAGESIZE 0x8000
15153 #include "elf32-target.h"