1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008 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 struct elf_backend_data elf32_arm_vxworks_bed
;
66 static bfd_boolean
elf32_arm_write_section (bfd
*output_bfd
,
67 struct bfd_link_info
*link_info
,
71 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
72 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
75 static reloc_howto_type elf32_arm_howto_table_1
[] =
78 HOWTO (R_ARM_NONE
, /* type */
80 0, /* size (0 = byte, 1 = short, 2 = long) */
82 FALSE
, /* pc_relative */
84 complain_overflow_dont
,/* complain_on_overflow */
85 bfd_elf_generic_reloc
, /* special_function */
86 "R_ARM_NONE", /* name */
87 FALSE
, /* partial_inplace */
90 FALSE
), /* pcrel_offset */
92 HOWTO (R_ARM_PC24
, /* type */
94 2, /* size (0 = byte, 1 = short, 2 = long) */
96 TRUE
, /* pc_relative */
98 complain_overflow_signed
,/* complain_on_overflow */
99 bfd_elf_generic_reloc
, /* special_function */
100 "R_ARM_PC24", /* name */
101 FALSE
, /* partial_inplace */
102 0x00ffffff, /* src_mask */
103 0x00ffffff, /* dst_mask */
104 TRUE
), /* pcrel_offset */
106 /* 32 bit absolute */
107 HOWTO (R_ARM_ABS32
, /* type */
109 2, /* size (0 = byte, 1 = short, 2 = long) */
111 FALSE
, /* pc_relative */
113 complain_overflow_bitfield
,/* complain_on_overflow */
114 bfd_elf_generic_reloc
, /* special_function */
115 "R_ARM_ABS32", /* name */
116 FALSE
, /* partial_inplace */
117 0xffffffff, /* src_mask */
118 0xffffffff, /* dst_mask */
119 FALSE
), /* pcrel_offset */
121 /* standard 32bit pc-relative reloc */
122 HOWTO (R_ARM_REL32
, /* type */
124 2, /* size (0 = byte, 1 = short, 2 = long) */
126 TRUE
, /* pc_relative */
128 complain_overflow_bitfield
,/* complain_on_overflow */
129 bfd_elf_generic_reloc
, /* special_function */
130 "R_ARM_REL32", /* name */
131 FALSE
, /* partial_inplace */
132 0xffffffff, /* src_mask */
133 0xffffffff, /* dst_mask */
134 TRUE
), /* pcrel_offset */
136 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
137 HOWTO (R_ARM_LDR_PC_G0
, /* type */
139 0, /* size (0 = byte, 1 = short, 2 = long) */
141 TRUE
, /* pc_relative */
143 complain_overflow_dont
,/* complain_on_overflow */
144 bfd_elf_generic_reloc
, /* special_function */
145 "R_ARM_LDR_PC_G0", /* name */
146 FALSE
, /* partial_inplace */
147 0xffffffff, /* src_mask */
148 0xffffffff, /* dst_mask */
149 TRUE
), /* pcrel_offset */
151 /* 16 bit absolute */
152 HOWTO (R_ARM_ABS16
, /* type */
154 1, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE
, /* pc_relative */
158 complain_overflow_bitfield
,/* complain_on_overflow */
159 bfd_elf_generic_reloc
, /* special_function */
160 "R_ARM_ABS16", /* name */
161 FALSE
, /* partial_inplace */
162 0x0000ffff, /* src_mask */
163 0x0000ffff, /* dst_mask */
164 FALSE
), /* pcrel_offset */
166 /* 12 bit absolute */
167 HOWTO (R_ARM_ABS12
, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE
, /* pc_relative */
173 complain_overflow_bitfield
,/* complain_on_overflow */
174 bfd_elf_generic_reloc
, /* special_function */
175 "R_ARM_ABS12", /* name */
176 FALSE
, /* partial_inplace */
177 0x00000fff, /* src_mask */
178 0x00000fff, /* dst_mask */
179 FALSE
), /* pcrel_offset */
181 HOWTO (R_ARM_THM_ABS5
, /* type */
183 1, /* size (0 = byte, 1 = short, 2 = long) */
185 FALSE
, /* pc_relative */
187 complain_overflow_bitfield
,/* complain_on_overflow */
188 bfd_elf_generic_reloc
, /* special_function */
189 "R_ARM_THM_ABS5", /* name */
190 FALSE
, /* partial_inplace */
191 0x000007e0, /* src_mask */
192 0x000007e0, /* dst_mask */
193 FALSE
), /* pcrel_offset */
196 HOWTO (R_ARM_ABS8
, /* type */
198 0, /* size (0 = byte, 1 = short, 2 = long) */
200 FALSE
, /* pc_relative */
202 complain_overflow_bitfield
,/* complain_on_overflow */
203 bfd_elf_generic_reloc
, /* special_function */
204 "R_ARM_ABS8", /* name */
205 FALSE
, /* partial_inplace */
206 0x000000ff, /* src_mask */
207 0x000000ff, /* dst_mask */
208 FALSE
), /* pcrel_offset */
210 HOWTO (R_ARM_SBREL32
, /* type */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
214 FALSE
, /* pc_relative */
216 complain_overflow_dont
,/* complain_on_overflow */
217 bfd_elf_generic_reloc
, /* special_function */
218 "R_ARM_SBREL32", /* name */
219 FALSE
, /* partial_inplace */
220 0xffffffff, /* src_mask */
221 0xffffffff, /* dst_mask */
222 FALSE
), /* pcrel_offset */
224 HOWTO (R_ARM_THM_CALL
, /* type */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
228 TRUE
, /* pc_relative */
230 complain_overflow_signed
,/* complain_on_overflow */
231 bfd_elf_generic_reloc
, /* special_function */
232 "R_ARM_THM_CALL", /* name */
233 FALSE
, /* partial_inplace */
234 0x07ff07ff, /* src_mask */
235 0x07ff07ff, /* dst_mask */
236 TRUE
), /* pcrel_offset */
238 HOWTO (R_ARM_THM_PC8
, /* type */
240 1, /* size (0 = byte, 1 = short, 2 = long) */
242 TRUE
, /* pc_relative */
244 complain_overflow_signed
,/* complain_on_overflow */
245 bfd_elf_generic_reloc
, /* special_function */
246 "R_ARM_THM_PC8", /* name */
247 FALSE
, /* partial_inplace */
248 0x000000ff, /* src_mask */
249 0x000000ff, /* dst_mask */
250 TRUE
), /* pcrel_offset */
252 HOWTO (R_ARM_BREL_ADJ
, /* type */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
256 FALSE
, /* pc_relative */
258 complain_overflow_signed
,/* complain_on_overflow */
259 bfd_elf_generic_reloc
, /* special_function */
260 "R_ARM_BREL_ADJ", /* name */
261 FALSE
, /* partial_inplace */
262 0xffffffff, /* src_mask */
263 0xffffffff, /* dst_mask */
264 FALSE
), /* pcrel_offset */
266 HOWTO (R_ARM_SWI24
, /* type */
268 0, /* size (0 = byte, 1 = short, 2 = long) */
270 FALSE
, /* pc_relative */
272 complain_overflow_signed
,/* complain_on_overflow */
273 bfd_elf_generic_reloc
, /* special_function */
274 "R_ARM_SWI24", /* name */
275 FALSE
, /* partial_inplace */
276 0x00000000, /* src_mask */
277 0x00000000, /* dst_mask */
278 FALSE
), /* pcrel_offset */
280 HOWTO (R_ARM_THM_SWI8
, /* type */
282 0, /* size (0 = byte, 1 = short, 2 = long) */
284 FALSE
, /* pc_relative */
286 complain_overflow_signed
,/* complain_on_overflow */
287 bfd_elf_generic_reloc
, /* special_function */
288 "R_ARM_SWI8", /* name */
289 FALSE
, /* partial_inplace */
290 0x00000000, /* src_mask */
291 0x00000000, /* dst_mask */
292 FALSE
), /* pcrel_offset */
294 /* BLX instruction for the ARM. */
295 HOWTO (R_ARM_XPC25
, /* type */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
299 TRUE
, /* pc_relative */
301 complain_overflow_signed
,/* complain_on_overflow */
302 bfd_elf_generic_reloc
, /* special_function */
303 "R_ARM_XPC25", /* name */
304 FALSE
, /* partial_inplace */
305 0x00ffffff, /* src_mask */
306 0x00ffffff, /* dst_mask */
307 TRUE
), /* pcrel_offset */
309 /* BLX instruction for the Thumb. */
310 HOWTO (R_ARM_THM_XPC22
, /* type */
312 2, /* size (0 = byte, 1 = short, 2 = long) */
314 TRUE
, /* pc_relative */
316 complain_overflow_signed
,/* complain_on_overflow */
317 bfd_elf_generic_reloc
, /* special_function */
318 "R_ARM_THM_XPC22", /* name */
319 FALSE
, /* partial_inplace */
320 0x07ff07ff, /* src_mask */
321 0x07ff07ff, /* dst_mask */
322 TRUE
), /* pcrel_offset */
324 /* Dynamic TLS relocations. */
326 HOWTO (R_ARM_TLS_DTPMOD32
, /* type */
328 2, /* size (0 = byte, 1 = short, 2 = long) */
330 FALSE
, /* pc_relative */
332 complain_overflow_bitfield
,/* complain_on_overflow */
333 bfd_elf_generic_reloc
, /* special_function */
334 "R_ARM_TLS_DTPMOD32", /* name */
335 TRUE
, /* partial_inplace */
336 0xffffffff, /* src_mask */
337 0xffffffff, /* dst_mask */
338 FALSE
), /* pcrel_offset */
340 HOWTO (R_ARM_TLS_DTPOFF32
, /* type */
342 2, /* size (0 = byte, 1 = short, 2 = long) */
344 FALSE
, /* pc_relative */
346 complain_overflow_bitfield
,/* complain_on_overflow */
347 bfd_elf_generic_reloc
, /* special_function */
348 "R_ARM_TLS_DTPOFF32", /* name */
349 TRUE
, /* partial_inplace */
350 0xffffffff, /* src_mask */
351 0xffffffff, /* dst_mask */
352 FALSE
), /* pcrel_offset */
354 HOWTO (R_ARM_TLS_TPOFF32
, /* type */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
358 FALSE
, /* pc_relative */
360 complain_overflow_bitfield
,/* complain_on_overflow */
361 bfd_elf_generic_reloc
, /* special_function */
362 "R_ARM_TLS_TPOFF32", /* name */
363 TRUE
, /* partial_inplace */
364 0xffffffff, /* src_mask */
365 0xffffffff, /* dst_mask */
366 FALSE
), /* pcrel_offset */
368 /* Relocs used in ARM Linux */
370 HOWTO (R_ARM_COPY
, /* type */
372 2, /* size (0 = byte, 1 = short, 2 = long) */
374 FALSE
, /* pc_relative */
376 complain_overflow_bitfield
,/* complain_on_overflow */
377 bfd_elf_generic_reloc
, /* special_function */
378 "R_ARM_COPY", /* name */
379 TRUE
, /* partial_inplace */
380 0xffffffff, /* src_mask */
381 0xffffffff, /* dst_mask */
382 FALSE
), /* pcrel_offset */
384 HOWTO (R_ARM_GLOB_DAT
, /* type */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
388 FALSE
, /* pc_relative */
390 complain_overflow_bitfield
,/* complain_on_overflow */
391 bfd_elf_generic_reloc
, /* special_function */
392 "R_ARM_GLOB_DAT", /* name */
393 TRUE
, /* partial_inplace */
394 0xffffffff, /* src_mask */
395 0xffffffff, /* dst_mask */
396 FALSE
), /* pcrel_offset */
398 HOWTO (R_ARM_JUMP_SLOT
, /* type */
400 2, /* size (0 = byte, 1 = short, 2 = long) */
402 FALSE
, /* pc_relative */
404 complain_overflow_bitfield
,/* complain_on_overflow */
405 bfd_elf_generic_reloc
, /* special_function */
406 "R_ARM_JUMP_SLOT", /* name */
407 TRUE
, /* partial_inplace */
408 0xffffffff, /* src_mask */
409 0xffffffff, /* dst_mask */
410 FALSE
), /* pcrel_offset */
412 HOWTO (R_ARM_RELATIVE
, /* type */
414 2, /* size (0 = byte, 1 = short, 2 = long) */
416 FALSE
, /* pc_relative */
418 complain_overflow_bitfield
,/* complain_on_overflow */
419 bfd_elf_generic_reloc
, /* special_function */
420 "R_ARM_RELATIVE", /* name */
421 TRUE
, /* partial_inplace */
422 0xffffffff, /* src_mask */
423 0xffffffff, /* dst_mask */
424 FALSE
), /* pcrel_offset */
426 HOWTO (R_ARM_GOTOFF32
, /* type */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
430 FALSE
, /* pc_relative */
432 complain_overflow_bitfield
,/* complain_on_overflow */
433 bfd_elf_generic_reloc
, /* special_function */
434 "R_ARM_GOTOFF32", /* name */
435 TRUE
, /* partial_inplace */
436 0xffffffff, /* src_mask */
437 0xffffffff, /* dst_mask */
438 FALSE
), /* pcrel_offset */
440 HOWTO (R_ARM_GOTPC
, /* type */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
444 TRUE
, /* pc_relative */
446 complain_overflow_bitfield
,/* complain_on_overflow */
447 bfd_elf_generic_reloc
, /* special_function */
448 "R_ARM_GOTPC", /* name */
449 TRUE
, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 TRUE
), /* pcrel_offset */
454 HOWTO (R_ARM_GOT32
, /* type */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
458 FALSE
, /* pc_relative */
460 complain_overflow_bitfield
,/* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_ARM_GOT32", /* name */
463 TRUE
, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE
), /* pcrel_offset */
468 HOWTO (R_ARM_PLT32
, /* type */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
472 TRUE
, /* pc_relative */
474 complain_overflow_bitfield
,/* complain_on_overflow */
475 bfd_elf_generic_reloc
, /* special_function */
476 "R_ARM_PLT32", /* name */
477 FALSE
, /* partial_inplace */
478 0x00ffffff, /* src_mask */
479 0x00ffffff, /* dst_mask */
480 TRUE
), /* pcrel_offset */
482 HOWTO (R_ARM_CALL
, /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 TRUE
, /* pc_relative */
488 complain_overflow_signed
,/* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 "R_ARM_CALL", /* name */
491 FALSE
, /* partial_inplace */
492 0x00ffffff, /* src_mask */
493 0x00ffffff, /* dst_mask */
494 TRUE
), /* pcrel_offset */
496 HOWTO (R_ARM_JUMP24
, /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 TRUE
, /* pc_relative */
502 complain_overflow_signed
,/* complain_on_overflow */
503 bfd_elf_generic_reloc
, /* special_function */
504 "R_ARM_JUMP24", /* name */
505 FALSE
, /* partial_inplace */
506 0x00ffffff, /* src_mask */
507 0x00ffffff, /* dst_mask */
508 TRUE
), /* pcrel_offset */
510 HOWTO (R_ARM_THM_JUMP24
, /* type */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
514 TRUE
, /* pc_relative */
516 complain_overflow_signed
,/* complain_on_overflow */
517 bfd_elf_generic_reloc
, /* special_function */
518 "R_ARM_THM_JUMP24", /* name */
519 FALSE
, /* partial_inplace */
520 0x07ff2fff, /* src_mask */
521 0x07ff2fff, /* dst_mask */
522 TRUE
), /* pcrel_offset */
524 HOWTO (R_ARM_BASE_ABS
, /* type */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
528 FALSE
, /* pc_relative */
530 complain_overflow_dont
,/* complain_on_overflow */
531 bfd_elf_generic_reloc
, /* special_function */
532 "R_ARM_BASE_ABS", /* name */
533 FALSE
, /* partial_inplace */
534 0xffffffff, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE
), /* pcrel_offset */
538 HOWTO (R_ARM_ALU_PCREL7_0
, /* type */
540 2, /* size (0 = byte, 1 = short, 2 = long) */
542 TRUE
, /* pc_relative */
544 complain_overflow_dont
,/* complain_on_overflow */
545 bfd_elf_generic_reloc
, /* special_function */
546 "R_ARM_ALU_PCREL_7_0", /* name */
547 FALSE
, /* partial_inplace */
548 0x00000fff, /* src_mask */
549 0x00000fff, /* dst_mask */
550 TRUE
), /* pcrel_offset */
552 HOWTO (R_ARM_ALU_PCREL15_8
, /* type */
554 2, /* size (0 = byte, 1 = short, 2 = long) */
556 TRUE
, /* pc_relative */
558 complain_overflow_dont
,/* complain_on_overflow */
559 bfd_elf_generic_reloc
, /* special_function */
560 "R_ARM_ALU_PCREL_15_8",/* name */
561 FALSE
, /* partial_inplace */
562 0x00000fff, /* src_mask */
563 0x00000fff, /* dst_mask */
564 TRUE
), /* pcrel_offset */
566 HOWTO (R_ARM_ALU_PCREL23_15
, /* type */
568 2, /* size (0 = byte, 1 = short, 2 = long) */
570 TRUE
, /* pc_relative */
572 complain_overflow_dont
,/* complain_on_overflow */
573 bfd_elf_generic_reloc
, /* special_function */
574 "R_ARM_ALU_PCREL_23_15",/* name */
575 FALSE
, /* partial_inplace */
576 0x00000fff, /* src_mask */
577 0x00000fff, /* dst_mask */
578 TRUE
), /* pcrel_offset */
580 HOWTO (R_ARM_LDR_SBREL_11_0
, /* type */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
584 FALSE
, /* pc_relative */
586 complain_overflow_dont
,/* complain_on_overflow */
587 bfd_elf_generic_reloc
, /* special_function */
588 "R_ARM_LDR_SBREL_11_0",/* name */
589 FALSE
, /* partial_inplace */
590 0x00000fff, /* src_mask */
591 0x00000fff, /* dst_mask */
592 FALSE
), /* pcrel_offset */
594 HOWTO (R_ARM_ALU_SBREL_19_12
, /* type */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
598 FALSE
, /* pc_relative */
600 complain_overflow_dont
,/* complain_on_overflow */
601 bfd_elf_generic_reloc
, /* special_function */
602 "R_ARM_ALU_SBREL_19_12",/* name */
603 FALSE
, /* partial_inplace */
604 0x000ff000, /* src_mask */
605 0x000ff000, /* dst_mask */
606 FALSE
), /* pcrel_offset */
608 HOWTO (R_ARM_ALU_SBREL_27_20
, /* type */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
612 FALSE
, /* pc_relative */
614 complain_overflow_dont
,/* complain_on_overflow */
615 bfd_elf_generic_reloc
, /* special_function */
616 "R_ARM_ALU_SBREL_27_20",/* name */
617 FALSE
, /* partial_inplace */
618 0x0ff00000, /* src_mask */
619 0x0ff00000, /* dst_mask */
620 FALSE
), /* pcrel_offset */
622 HOWTO (R_ARM_TARGET1
, /* type */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
626 FALSE
, /* pc_relative */
628 complain_overflow_dont
,/* complain_on_overflow */
629 bfd_elf_generic_reloc
, /* special_function */
630 "R_ARM_TARGET1", /* name */
631 FALSE
, /* partial_inplace */
632 0xffffffff, /* src_mask */
633 0xffffffff, /* dst_mask */
634 FALSE
), /* pcrel_offset */
636 HOWTO (R_ARM_ROSEGREL32
, /* type */
638 2, /* size (0 = byte, 1 = short, 2 = long) */
640 FALSE
, /* pc_relative */
642 complain_overflow_dont
,/* complain_on_overflow */
643 bfd_elf_generic_reloc
, /* special_function */
644 "R_ARM_ROSEGREL32", /* name */
645 FALSE
, /* partial_inplace */
646 0xffffffff, /* src_mask */
647 0xffffffff, /* dst_mask */
648 FALSE
), /* pcrel_offset */
650 HOWTO (R_ARM_V4BX
, /* type */
652 2, /* size (0 = byte, 1 = short, 2 = long) */
654 FALSE
, /* pc_relative */
656 complain_overflow_dont
,/* complain_on_overflow */
657 bfd_elf_generic_reloc
, /* special_function */
658 "R_ARM_V4BX", /* name */
659 FALSE
, /* partial_inplace */
660 0xffffffff, /* src_mask */
661 0xffffffff, /* dst_mask */
662 FALSE
), /* pcrel_offset */
664 HOWTO (R_ARM_TARGET2
, /* type */
666 2, /* size (0 = byte, 1 = short, 2 = long) */
668 FALSE
, /* pc_relative */
670 complain_overflow_signed
,/* complain_on_overflow */
671 bfd_elf_generic_reloc
, /* special_function */
672 "R_ARM_TARGET2", /* name */
673 FALSE
, /* partial_inplace */
674 0xffffffff, /* src_mask */
675 0xffffffff, /* dst_mask */
676 TRUE
), /* pcrel_offset */
678 HOWTO (R_ARM_PREL31
, /* type */
680 2, /* size (0 = byte, 1 = short, 2 = long) */
682 TRUE
, /* pc_relative */
684 complain_overflow_signed
,/* complain_on_overflow */
685 bfd_elf_generic_reloc
, /* special_function */
686 "R_ARM_PREL31", /* name */
687 FALSE
, /* partial_inplace */
688 0x7fffffff, /* src_mask */
689 0x7fffffff, /* dst_mask */
690 TRUE
), /* pcrel_offset */
692 HOWTO (R_ARM_MOVW_ABS_NC
, /* type */
694 2, /* size (0 = byte, 1 = short, 2 = long) */
696 FALSE
, /* pc_relative */
698 complain_overflow_dont
,/* complain_on_overflow */
699 bfd_elf_generic_reloc
, /* special_function */
700 "R_ARM_MOVW_ABS_NC", /* name */
701 FALSE
, /* partial_inplace */
702 0x000f0fff, /* src_mask */
703 0x000f0fff, /* dst_mask */
704 FALSE
), /* pcrel_offset */
706 HOWTO (R_ARM_MOVT_ABS
, /* type */
708 2, /* size (0 = byte, 1 = short, 2 = long) */
710 FALSE
, /* pc_relative */
712 complain_overflow_bitfield
,/* complain_on_overflow */
713 bfd_elf_generic_reloc
, /* special_function */
714 "R_ARM_MOVT_ABS", /* name */
715 FALSE
, /* partial_inplace */
716 0x000f0fff, /* src_mask */
717 0x000f0fff, /* dst_mask */
718 FALSE
), /* pcrel_offset */
720 HOWTO (R_ARM_MOVW_PREL_NC
, /* type */
722 2, /* size (0 = byte, 1 = short, 2 = long) */
724 TRUE
, /* pc_relative */
726 complain_overflow_dont
,/* complain_on_overflow */
727 bfd_elf_generic_reloc
, /* special_function */
728 "R_ARM_MOVW_PREL_NC", /* name */
729 FALSE
, /* partial_inplace */
730 0x000f0fff, /* src_mask */
731 0x000f0fff, /* dst_mask */
732 TRUE
), /* pcrel_offset */
734 HOWTO (R_ARM_MOVT_PREL
, /* type */
736 2, /* size (0 = byte, 1 = short, 2 = long) */
738 TRUE
, /* pc_relative */
740 complain_overflow_bitfield
,/* complain_on_overflow */
741 bfd_elf_generic_reloc
, /* special_function */
742 "R_ARM_MOVT_PREL", /* name */
743 FALSE
, /* partial_inplace */
744 0x000f0fff, /* src_mask */
745 0x000f0fff, /* dst_mask */
746 TRUE
), /* pcrel_offset */
748 HOWTO (R_ARM_THM_MOVW_ABS_NC
, /* type */
750 2, /* size (0 = byte, 1 = short, 2 = long) */
752 FALSE
, /* pc_relative */
754 complain_overflow_dont
,/* complain_on_overflow */
755 bfd_elf_generic_reloc
, /* special_function */
756 "R_ARM_THM_MOVW_ABS_NC",/* name */
757 FALSE
, /* partial_inplace */
758 0x040f70ff, /* src_mask */
759 0x040f70ff, /* dst_mask */
760 FALSE
), /* pcrel_offset */
762 HOWTO (R_ARM_THM_MOVT_ABS
, /* type */
764 2, /* size (0 = byte, 1 = short, 2 = long) */
766 FALSE
, /* pc_relative */
768 complain_overflow_bitfield
,/* complain_on_overflow */
769 bfd_elf_generic_reloc
, /* special_function */
770 "R_ARM_THM_MOVT_ABS", /* name */
771 FALSE
, /* partial_inplace */
772 0x040f70ff, /* src_mask */
773 0x040f70ff, /* dst_mask */
774 FALSE
), /* pcrel_offset */
776 HOWTO (R_ARM_THM_MOVW_PREL_NC
,/* type */
778 2, /* size (0 = byte, 1 = short, 2 = long) */
780 TRUE
, /* pc_relative */
782 complain_overflow_dont
,/* complain_on_overflow */
783 bfd_elf_generic_reloc
, /* special_function */
784 "R_ARM_THM_MOVW_PREL_NC",/* name */
785 FALSE
, /* partial_inplace */
786 0x040f70ff, /* src_mask */
787 0x040f70ff, /* dst_mask */
788 TRUE
), /* pcrel_offset */
790 HOWTO (R_ARM_THM_MOVT_PREL
, /* type */
792 2, /* size (0 = byte, 1 = short, 2 = long) */
794 TRUE
, /* pc_relative */
796 complain_overflow_bitfield
,/* complain_on_overflow */
797 bfd_elf_generic_reloc
, /* special_function */
798 "R_ARM_THM_MOVT_PREL", /* name */
799 FALSE
, /* partial_inplace */
800 0x040f70ff, /* src_mask */
801 0x040f70ff, /* dst_mask */
802 TRUE
), /* pcrel_offset */
804 HOWTO (R_ARM_THM_JUMP19
, /* type */
806 2, /* size (0 = byte, 1 = short, 2 = long) */
808 TRUE
, /* pc_relative */
810 complain_overflow_signed
,/* complain_on_overflow */
811 bfd_elf_generic_reloc
, /* special_function */
812 "R_ARM_THM_JUMP19", /* name */
813 FALSE
, /* partial_inplace */
814 0x043f2fff, /* src_mask */
815 0x043f2fff, /* dst_mask */
816 TRUE
), /* pcrel_offset */
818 HOWTO (R_ARM_THM_JUMP6
, /* type */
820 1, /* size (0 = byte, 1 = short, 2 = long) */
822 TRUE
, /* pc_relative */
824 complain_overflow_unsigned
,/* complain_on_overflow */
825 bfd_elf_generic_reloc
, /* special_function */
826 "R_ARM_THM_JUMP6", /* name */
827 FALSE
, /* partial_inplace */
828 0x02f8, /* src_mask */
829 0x02f8, /* dst_mask */
830 TRUE
), /* pcrel_offset */
832 /* These are declared as 13-bit signed relocations because we can
833 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
835 HOWTO (R_ARM_THM_ALU_PREL_11_0
,/* type */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
839 TRUE
, /* pc_relative */
841 complain_overflow_dont
,/* complain_on_overflow */
842 bfd_elf_generic_reloc
, /* special_function */
843 "R_ARM_THM_ALU_PREL_11_0",/* name */
844 FALSE
, /* partial_inplace */
845 0xffffffff, /* src_mask */
846 0xffffffff, /* dst_mask */
847 TRUE
), /* pcrel_offset */
849 HOWTO (R_ARM_THM_PC12
, /* type */
851 2, /* size (0 = byte, 1 = short, 2 = long) */
853 TRUE
, /* pc_relative */
855 complain_overflow_dont
,/* complain_on_overflow */
856 bfd_elf_generic_reloc
, /* special_function */
857 "R_ARM_THM_PC12", /* name */
858 FALSE
, /* partial_inplace */
859 0xffffffff, /* src_mask */
860 0xffffffff, /* dst_mask */
861 TRUE
), /* pcrel_offset */
863 HOWTO (R_ARM_ABS32_NOI
, /* type */
865 2, /* size (0 = byte, 1 = short, 2 = long) */
867 FALSE
, /* pc_relative */
869 complain_overflow_dont
,/* complain_on_overflow */
870 bfd_elf_generic_reloc
, /* special_function */
871 "R_ARM_ABS32_NOI", /* name */
872 FALSE
, /* partial_inplace */
873 0xffffffff, /* src_mask */
874 0xffffffff, /* dst_mask */
875 FALSE
), /* pcrel_offset */
877 HOWTO (R_ARM_REL32_NOI
, /* type */
879 2, /* size (0 = byte, 1 = short, 2 = long) */
881 TRUE
, /* pc_relative */
883 complain_overflow_dont
,/* complain_on_overflow */
884 bfd_elf_generic_reloc
, /* special_function */
885 "R_ARM_REL32_NOI", /* name */
886 FALSE
, /* partial_inplace */
887 0xffffffff, /* src_mask */
888 0xffffffff, /* dst_mask */
889 FALSE
), /* pcrel_offset */
891 /* Group relocations. */
893 HOWTO (R_ARM_ALU_PC_G0_NC
, /* type */
895 2, /* size (0 = byte, 1 = short, 2 = long) */
897 TRUE
, /* pc_relative */
899 complain_overflow_dont
,/* complain_on_overflow */
900 bfd_elf_generic_reloc
, /* special_function */
901 "R_ARM_ALU_PC_G0_NC", /* name */
902 FALSE
, /* partial_inplace */
903 0xffffffff, /* src_mask */
904 0xffffffff, /* dst_mask */
905 TRUE
), /* pcrel_offset */
907 HOWTO (R_ARM_ALU_PC_G0
, /* type */
909 2, /* size (0 = byte, 1 = short, 2 = long) */
911 TRUE
, /* pc_relative */
913 complain_overflow_dont
,/* complain_on_overflow */
914 bfd_elf_generic_reloc
, /* special_function */
915 "R_ARM_ALU_PC_G0", /* name */
916 FALSE
, /* partial_inplace */
917 0xffffffff, /* src_mask */
918 0xffffffff, /* dst_mask */
919 TRUE
), /* pcrel_offset */
921 HOWTO (R_ARM_ALU_PC_G1_NC
, /* type */
923 2, /* size (0 = byte, 1 = short, 2 = long) */
925 TRUE
, /* pc_relative */
927 complain_overflow_dont
,/* complain_on_overflow */
928 bfd_elf_generic_reloc
, /* special_function */
929 "R_ARM_ALU_PC_G1_NC", /* name */
930 FALSE
, /* partial_inplace */
931 0xffffffff, /* src_mask */
932 0xffffffff, /* dst_mask */
933 TRUE
), /* pcrel_offset */
935 HOWTO (R_ARM_ALU_PC_G1
, /* type */
937 2, /* size (0 = byte, 1 = short, 2 = long) */
939 TRUE
, /* pc_relative */
941 complain_overflow_dont
,/* complain_on_overflow */
942 bfd_elf_generic_reloc
, /* special_function */
943 "R_ARM_ALU_PC_G1", /* name */
944 FALSE
, /* partial_inplace */
945 0xffffffff, /* src_mask */
946 0xffffffff, /* dst_mask */
947 TRUE
), /* pcrel_offset */
949 HOWTO (R_ARM_ALU_PC_G2
, /* type */
951 2, /* size (0 = byte, 1 = short, 2 = long) */
953 TRUE
, /* pc_relative */
955 complain_overflow_dont
,/* complain_on_overflow */
956 bfd_elf_generic_reloc
, /* special_function */
957 "R_ARM_ALU_PC_G2", /* name */
958 FALSE
, /* partial_inplace */
959 0xffffffff, /* src_mask */
960 0xffffffff, /* dst_mask */
961 TRUE
), /* pcrel_offset */
963 HOWTO (R_ARM_LDR_PC_G1
, /* type */
965 2, /* size (0 = byte, 1 = short, 2 = long) */
967 TRUE
, /* pc_relative */
969 complain_overflow_dont
,/* complain_on_overflow */
970 bfd_elf_generic_reloc
, /* special_function */
971 "R_ARM_LDR_PC_G1", /* name */
972 FALSE
, /* partial_inplace */
973 0xffffffff, /* src_mask */
974 0xffffffff, /* dst_mask */
975 TRUE
), /* pcrel_offset */
977 HOWTO (R_ARM_LDR_PC_G2
, /* type */
979 2, /* size (0 = byte, 1 = short, 2 = long) */
981 TRUE
, /* pc_relative */
983 complain_overflow_dont
,/* complain_on_overflow */
984 bfd_elf_generic_reloc
, /* special_function */
985 "R_ARM_LDR_PC_G2", /* name */
986 FALSE
, /* partial_inplace */
987 0xffffffff, /* src_mask */
988 0xffffffff, /* dst_mask */
989 TRUE
), /* pcrel_offset */
991 HOWTO (R_ARM_LDRS_PC_G0
, /* type */
993 2, /* size (0 = byte, 1 = short, 2 = long) */
995 TRUE
, /* pc_relative */
997 complain_overflow_dont
,/* complain_on_overflow */
998 bfd_elf_generic_reloc
, /* special_function */
999 "R_ARM_LDRS_PC_G0", /* name */
1000 FALSE
, /* partial_inplace */
1001 0xffffffff, /* src_mask */
1002 0xffffffff, /* dst_mask */
1003 TRUE
), /* pcrel_offset */
1005 HOWTO (R_ARM_LDRS_PC_G1
, /* type */
1007 2, /* size (0 = byte, 1 = short, 2 = long) */
1009 TRUE
, /* pc_relative */
1011 complain_overflow_dont
,/* complain_on_overflow */
1012 bfd_elf_generic_reloc
, /* special_function */
1013 "R_ARM_LDRS_PC_G1", /* name */
1014 FALSE
, /* partial_inplace */
1015 0xffffffff, /* src_mask */
1016 0xffffffff, /* dst_mask */
1017 TRUE
), /* pcrel_offset */
1019 HOWTO (R_ARM_LDRS_PC_G2
, /* type */
1021 2, /* size (0 = byte, 1 = short, 2 = long) */
1023 TRUE
, /* pc_relative */
1025 complain_overflow_dont
,/* complain_on_overflow */
1026 bfd_elf_generic_reloc
, /* special_function */
1027 "R_ARM_LDRS_PC_G2", /* name */
1028 FALSE
, /* partial_inplace */
1029 0xffffffff, /* src_mask */
1030 0xffffffff, /* dst_mask */
1031 TRUE
), /* pcrel_offset */
1033 HOWTO (R_ARM_LDC_PC_G0
, /* type */
1035 2, /* size (0 = byte, 1 = short, 2 = long) */
1037 TRUE
, /* pc_relative */
1039 complain_overflow_dont
,/* complain_on_overflow */
1040 bfd_elf_generic_reloc
, /* special_function */
1041 "R_ARM_LDC_PC_G0", /* name */
1042 FALSE
, /* partial_inplace */
1043 0xffffffff, /* src_mask */
1044 0xffffffff, /* dst_mask */
1045 TRUE
), /* pcrel_offset */
1047 HOWTO (R_ARM_LDC_PC_G1
, /* type */
1049 2, /* size (0 = byte, 1 = short, 2 = long) */
1051 TRUE
, /* pc_relative */
1053 complain_overflow_dont
,/* complain_on_overflow */
1054 bfd_elf_generic_reloc
, /* special_function */
1055 "R_ARM_LDC_PC_G1", /* name */
1056 FALSE
, /* partial_inplace */
1057 0xffffffff, /* src_mask */
1058 0xffffffff, /* dst_mask */
1059 TRUE
), /* pcrel_offset */
1061 HOWTO (R_ARM_LDC_PC_G2
, /* type */
1063 2, /* size (0 = byte, 1 = short, 2 = long) */
1065 TRUE
, /* pc_relative */
1067 complain_overflow_dont
,/* complain_on_overflow */
1068 bfd_elf_generic_reloc
, /* special_function */
1069 "R_ARM_LDC_PC_G2", /* name */
1070 FALSE
, /* partial_inplace */
1071 0xffffffff, /* src_mask */
1072 0xffffffff, /* dst_mask */
1073 TRUE
), /* pcrel_offset */
1075 HOWTO (R_ARM_ALU_SB_G0_NC
, /* type */
1077 2, /* size (0 = byte, 1 = short, 2 = long) */
1079 TRUE
, /* pc_relative */
1081 complain_overflow_dont
,/* complain_on_overflow */
1082 bfd_elf_generic_reloc
, /* special_function */
1083 "R_ARM_ALU_SB_G0_NC", /* name */
1084 FALSE
, /* partial_inplace */
1085 0xffffffff, /* src_mask */
1086 0xffffffff, /* dst_mask */
1087 TRUE
), /* pcrel_offset */
1089 HOWTO (R_ARM_ALU_SB_G0
, /* type */
1091 2, /* size (0 = byte, 1 = short, 2 = long) */
1093 TRUE
, /* pc_relative */
1095 complain_overflow_dont
,/* complain_on_overflow */
1096 bfd_elf_generic_reloc
, /* special_function */
1097 "R_ARM_ALU_SB_G0", /* name */
1098 FALSE
, /* partial_inplace */
1099 0xffffffff, /* src_mask */
1100 0xffffffff, /* dst_mask */
1101 TRUE
), /* pcrel_offset */
1103 HOWTO (R_ARM_ALU_SB_G1_NC
, /* type */
1105 2, /* size (0 = byte, 1 = short, 2 = long) */
1107 TRUE
, /* pc_relative */
1109 complain_overflow_dont
,/* complain_on_overflow */
1110 bfd_elf_generic_reloc
, /* special_function */
1111 "R_ARM_ALU_SB_G1_NC", /* name */
1112 FALSE
, /* partial_inplace */
1113 0xffffffff, /* src_mask */
1114 0xffffffff, /* dst_mask */
1115 TRUE
), /* pcrel_offset */
1117 HOWTO (R_ARM_ALU_SB_G1
, /* type */
1119 2, /* size (0 = byte, 1 = short, 2 = long) */
1121 TRUE
, /* pc_relative */
1123 complain_overflow_dont
,/* complain_on_overflow */
1124 bfd_elf_generic_reloc
, /* special_function */
1125 "R_ARM_ALU_SB_G1", /* name */
1126 FALSE
, /* partial_inplace */
1127 0xffffffff, /* src_mask */
1128 0xffffffff, /* dst_mask */
1129 TRUE
), /* pcrel_offset */
1131 HOWTO (R_ARM_ALU_SB_G2
, /* type */
1133 2, /* size (0 = byte, 1 = short, 2 = long) */
1135 TRUE
, /* pc_relative */
1137 complain_overflow_dont
,/* complain_on_overflow */
1138 bfd_elf_generic_reloc
, /* special_function */
1139 "R_ARM_ALU_SB_G2", /* name */
1140 FALSE
, /* partial_inplace */
1141 0xffffffff, /* src_mask */
1142 0xffffffff, /* dst_mask */
1143 TRUE
), /* pcrel_offset */
1145 HOWTO (R_ARM_LDR_SB_G0
, /* type */
1147 2, /* size (0 = byte, 1 = short, 2 = long) */
1149 TRUE
, /* pc_relative */
1151 complain_overflow_dont
,/* complain_on_overflow */
1152 bfd_elf_generic_reloc
, /* special_function */
1153 "R_ARM_LDR_SB_G0", /* name */
1154 FALSE
, /* partial_inplace */
1155 0xffffffff, /* src_mask */
1156 0xffffffff, /* dst_mask */
1157 TRUE
), /* pcrel_offset */
1159 HOWTO (R_ARM_LDR_SB_G1
, /* type */
1161 2, /* size (0 = byte, 1 = short, 2 = long) */
1163 TRUE
, /* pc_relative */
1165 complain_overflow_dont
,/* complain_on_overflow */
1166 bfd_elf_generic_reloc
, /* special_function */
1167 "R_ARM_LDR_SB_G1", /* name */
1168 FALSE
, /* partial_inplace */
1169 0xffffffff, /* src_mask */
1170 0xffffffff, /* dst_mask */
1171 TRUE
), /* pcrel_offset */
1173 HOWTO (R_ARM_LDR_SB_G2
, /* type */
1175 2, /* size (0 = byte, 1 = short, 2 = long) */
1177 TRUE
, /* pc_relative */
1179 complain_overflow_dont
,/* complain_on_overflow */
1180 bfd_elf_generic_reloc
, /* special_function */
1181 "R_ARM_LDR_SB_G2", /* name */
1182 FALSE
, /* partial_inplace */
1183 0xffffffff, /* src_mask */
1184 0xffffffff, /* dst_mask */
1185 TRUE
), /* pcrel_offset */
1187 HOWTO (R_ARM_LDRS_SB_G0
, /* type */
1189 2, /* size (0 = byte, 1 = short, 2 = long) */
1191 TRUE
, /* pc_relative */
1193 complain_overflow_dont
,/* complain_on_overflow */
1194 bfd_elf_generic_reloc
, /* special_function */
1195 "R_ARM_LDRS_SB_G0", /* name */
1196 FALSE
, /* partial_inplace */
1197 0xffffffff, /* src_mask */
1198 0xffffffff, /* dst_mask */
1199 TRUE
), /* pcrel_offset */
1201 HOWTO (R_ARM_LDRS_SB_G1
, /* type */
1203 2, /* size (0 = byte, 1 = short, 2 = long) */
1205 TRUE
, /* pc_relative */
1207 complain_overflow_dont
,/* complain_on_overflow */
1208 bfd_elf_generic_reloc
, /* special_function */
1209 "R_ARM_LDRS_SB_G1", /* name */
1210 FALSE
, /* partial_inplace */
1211 0xffffffff, /* src_mask */
1212 0xffffffff, /* dst_mask */
1213 TRUE
), /* pcrel_offset */
1215 HOWTO (R_ARM_LDRS_SB_G2
, /* type */
1217 2, /* size (0 = byte, 1 = short, 2 = long) */
1219 TRUE
, /* pc_relative */
1221 complain_overflow_dont
,/* complain_on_overflow */
1222 bfd_elf_generic_reloc
, /* special_function */
1223 "R_ARM_LDRS_SB_G2", /* name */
1224 FALSE
, /* partial_inplace */
1225 0xffffffff, /* src_mask */
1226 0xffffffff, /* dst_mask */
1227 TRUE
), /* pcrel_offset */
1229 HOWTO (R_ARM_LDC_SB_G0
, /* type */
1231 2, /* size (0 = byte, 1 = short, 2 = long) */
1233 TRUE
, /* pc_relative */
1235 complain_overflow_dont
,/* complain_on_overflow */
1236 bfd_elf_generic_reloc
, /* special_function */
1237 "R_ARM_LDC_SB_G0", /* name */
1238 FALSE
, /* partial_inplace */
1239 0xffffffff, /* src_mask */
1240 0xffffffff, /* dst_mask */
1241 TRUE
), /* pcrel_offset */
1243 HOWTO (R_ARM_LDC_SB_G1
, /* type */
1245 2, /* size (0 = byte, 1 = short, 2 = long) */
1247 TRUE
, /* pc_relative */
1249 complain_overflow_dont
,/* complain_on_overflow */
1250 bfd_elf_generic_reloc
, /* special_function */
1251 "R_ARM_LDC_SB_G1", /* name */
1252 FALSE
, /* partial_inplace */
1253 0xffffffff, /* src_mask */
1254 0xffffffff, /* dst_mask */
1255 TRUE
), /* pcrel_offset */
1257 HOWTO (R_ARM_LDC_SB_G2
, /* type */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1261 TRUE
, /* pc_relative */
1263 complain_overflow_dont
,/* complain_on_overflow */
1264 bfd_elf_generic_reloc
, /* special_function */
1265 "R_ARM_LDC_SB_G2", /* name */
1266 FALSE
, /* partial_inplace */
1267 0xffffffff, /* src_mask */
1268 0xffffffff, /* dst_mask */
1269 TRUE
), /* pcrel_offset */
1271 /* End of group relocations. */
1273 HOWTO (R_ARM_MOVW_BREL_NC
, /* type */
1275 2, /* size (0 = byte, 1 = short, 2 = long) */
1277 FALSE
, /* pc_relative */
1279 complain_overflow_dont
,/* complain_on_overflow */
1280 bfd_elf_generic_reloc
, /* special_function */
1281 "R_ARM_MOVW_BREL_NC", /* name */
1282 FALSE
, /* partial_inplace */
1283 0x0000ffff, /* src_mask */
1284 0x0000ffff, /* dst_mask */
1285 FALSE
), /* pcrel_offset */
1287 HOWTO (R_ARM_MOVT_BREL
, /* type */
1289 2, /* size (0 = byte, 1 = short, 2 = long) */
1291 FALSE
, /* pc_relative */
1293 complain_overflow_bitfield
,/* complain_on_overflow */
1294 bfd_elf_generic_reloc
, /* special_function */
1295 "R_ARM_MOVT_BREL", /* name */
1296 FALSE
, /* partial_inplace */
1297 0x0000ffff, /* src_mask */
1298 0x0000ffff, /* dst_mask */
1299 FALSE
), /* pcrel_offset */
1301 HOWTO (R_ARM_MOVW_BREL
, /* type */
1303 2, /* size (0 = byte, 1 = short, 2 = long) */
1305 FALSE
, /* pc_relative */
1307 complain_overflow_dont
,/* complain_on_overflow */
1308 bfd_elf_generic_reloc
, /* special_function */
1309 "R_ARM_MOVW_BREL", /* name */
1310 FALSE
, /* partial_inplace */
1311 0x0000ffff, /* src_mask */
1312 0x0000ffff, /* dst_mask */
1313 FALSE
), /* pcrel_offset */
1315 HOWTO (R_ARM_THM_MOVW_BREL_NC
,/* type */
1317 2, /* size (0 = byte, 1 = short, 2 = long) */
1319 FALSE
, /* pc_relative */
1321 complain_overflow_dont
,/* complain_on_overflow */
1322 bfd_elf_generic_reloc
, /* special_function */
1323 "R_ARM_THM_MOVW_BREL_NC",/* name */
1324 FALSE
, /* partial_inplace */
1325 0x040f70ff, /* src_mask */
1326 0x040f70ff, /* dst_mask */
1327 FALSE
), /* pcrel_offset */
1329 HOWTO (R_ARM_THM_MOVT_BREL
, /* type */
1331 2, /* size (0 = byte, 1 = short, 2 = long) */
1333 FALSE
, /* pc_relative */
1335 complain_overflow_bitfield
,/* complain_on_overflow */
1336 bfd_elf_generic_reloc
, /* special_function */
1337 "R_ARM_THM_MOVT_BREL", /* name */
1338 FALSE
, /* partial_inplace */
1339 0x040f70ff, /* src_mask */
1340 0x040f70ff, /* dst_mask */
1341 FALSE
), /* pcrel_offset */
1343 HOWTO (R_ARM_THM_MOVW_BREL
, /* type */
1345 2, /* size (0 = byte, 1 = short, 2 = long) */
1347 FALSE
, /* pc_relative */
1349 complain_overflow_dont
,/* complain_on_overflow */
1350 bfd_elf_generic_reloc
, /* special_function */
1351 "R_ARM_THM_MOVW_BREL", /* name */
1352 FALSE
, /* partial_inplace */
1353 0x040f70ff, /* src_mask */
1354 0x040f70ff, /* dst_mask */
1355 FALSE
), /* pcrel_offset */
1357 EMPTY_HOWTO (90), /* Unallocated. */
1362 HOWTO (R_ARM_PLT32_ABS
, /* type */
1364 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 FALSE
, /* pc_relative */
1368 complain_overflow_dont
,/* complain_on_overflow */
1369 bfd_elf_generic_reloc
, /* special_function */
1370 "R_ARM_PLT32_ABS", /* name */
1371 FALSE
, /* partial_inplace */
1372 0xffffffff, /* src_mask */
1373 0xffffffff, /* dst_mask */
1374 FALSE
), /* pcrel_offset */
1376 HOWTO (R_ARM_GOT_ABS
, /* type */
1378 2, /* size (0 = byte, 1 = short, 2 = long) */
1380 FALSE
, /* pc_relative */
1382 complain_overflow_dont
,/* complain_on_overflow */
1383 bfd_elf_generic_reloc
, /* special_function */
1384 "R_ARM_GOT_ABS", /* name */
1385 FALSE
, /* partial_inplace */
1386 0xffffffff, /* src_mask */
1387 0xffffffff, /* dst_mask */
1388 FALSE
), /* pcrel_offset */
1390 HOWTO (R_ARM_GOT_PREL
, /* type */
1392 2, /* size (0 = byte, 1 = short, 2 = long) */
1394 TRUE
, /* pc_relative */
1396 complain_overflow_dont
, /* complain_on_overflow */
1397 bfd_elf_generic_reloc
, /* special_function */
1398 "R_ARM_GOT_PREL", /* name */
1399 FALSE
, /* partial_inplace */
1400 0xffffffff, /* src_mask */
1401 0xffffffff, /* dst_mask */
1402 TRUE
), /* pcrel_offset */
1404 HOWTO (R_ARM_GOT_BREL12
, /* type */
1406 2, /* size (0 = byte, 1 = short, 2 = long) */
1408 FALSE
, /* pc_relative */
1410 complain_overflow_bitfield
,/* complain_on_overflow */
1411 bfd_elf_generic_reloc
, /* special_function */
1412 "R_ARM_GOT_BREL12", /* name */
1413 FALSE
, /* partial_inplace */
1414 0x00000fff, /* src_mask */
1415 0x00000fff, /* dst_mask */
1416 FALSE
), /* pcrel_offset */
1418 HOWTO (R_ARM_GOTOFF12
, /* type */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1422 FALSE
, /* pc_relative */
1424 complain_overflow_bitfield
,/* complain_on_overflow */
1425 bfd_elf_generic_reloc
, /* special_function */
1426 "R_ARM_GOTOFF12", /* name */
1427 FALSE
, /* partial_inplace */
1428 0x00000fff, /* src_mask */
1429 0x00000fff, /* dst_mask */
1430 FALSE
), /* pcrel_offset */
1432 EMPTY_HOWTO (R_ARM_GOTRELAX
), /* reserved for future GOT-load optimizations */
1434 /* GNU extension to record C++ vtable member usage */
1435 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
1437 2, /* size (0 = byte, 1 = short, 2 = long) */
1439 FALSE
, /* pc_relative */
1441 complain_overflow_dont
, /* complain_on_overflow */
1442 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
1443 "R_ARM_GNU_VTENTRY", /* name */
1444 FALSE
, /* partial_inplace */
1447 FALSE
), /* pcrel_offset */
1449 /* GNU extension to record C++ vtable hierarchy */
1450 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
1452 2, /* size (0 = byte, 1 = short, 2 = long) */
1454 FALSE
, /* pc_relative */
1456 complain_overflow_dont
, /* complain_on_overflow */
1457 NULL
, /* special_function */
1458 "R_ARM_GNU_VTINHERIT", /* name */
1459 FALSE
, /* partial_inplace */
1462 FALSE
), /* pcrel_offset */
1464 HOWTO (R_ARM_THM_JUMP11
, /* type */
1466 1, /* size (0 = byte, 1 = short, 2 = long) */
1468 TRUE
, /* pc_relative */
1470 complain_overflow_signed
, /* complain_on_overflow */
1471 bfd_elf_generic_reloc
, /* special_function */
1472 "R_ARM_THM_JUMP11", /* name */
1473 FALSE
, /* partial_inplace */
1474 0x000007ff, /* src_mask */
1475 0x000007ff, /* dst_mask */
1476 TRUE
), /* pcrel_offset */
1478 HOWTO (R_ARM_THM_JUMP8
, /* type */
1480 1, /* size (0 = byte, 1 = short, 2 = long) */
1482 TRUE
, /* pc_relative */
1484 complain_overflow_signed
, /* complain_on_overflow */
1485 bfd_elf_generic_reloc
, /* special_function */
1486 "R_ARM_THM_JUMP8", /* name */
1487 FALSE
, /* partial_inplace */
1488 0x000000ff, /* src_mask */
1489 0x000000ff, /* dst_mask */
1490 TRUE
), /* pcrel_offset */
1492 /* TLS relocations */
1493 HOWTO (R_ARM_TLS_GD32
, /* type */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1497 FALSE
, /* pc_relative */
1499 complain_overflow_bitfield
,/* complain_on_overflow */
1500 NULL
, /* special_function */
1501 "R_ARM_TLS_GD32", /* name */
1502 TRUE
, /* partial_inplace */
1503 0xffffffff, /* src_mask */
1504 0xffffffff, /* dst_mask */
1505 FALSE
), /* pcrel_offset */
1507 HOWTO (R_ARM_TLS_LDM32
, /* type */
1509 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 FALSE
, /* pc_relative */
1513 complain_overflow_bitfield
,/* complain_on_overflow */
1514 bfd_elf_generic_reloc
, /* special_function */
1515 "R_ARM_TLS_LDM32", /* name */
1516 TRUE
, /* partial_inplace */
1517 0xffffffff, /* src_mask */
1518 0xffffffff, /* dst_mask */
1519 FALSE
), /* pcrel_offset */
1521 HOWTO (R_ARM_TLS_LDO32
, /* type */
1523 2, /* size (0 = byte, 1 = short, 2 = long) */
1525 FALSE
, /* pc_relative */
1527 complain_overflow_bitfield
,/* complain_on_overflow */
1528 bfd_elf_generic_reloc
, /* special_function */
1529 "R_ARM_TLS_LDO32", /* name */
1530 TRUE
, /* partial_inplace */
1531 0xffffffff, /* src_mask */
1532 0xffffffff, /* dst_mask */
1533 FALSE
), /* pcrel_offset */
1535 HOWTO (R_ARM_TLS_IE32
, /* type */
1537 2, /* size (0 = byte, 1 = short, 2 = long) */
1539 FALSE
, /* pc_relative */
1541 complain_overflow_bitfield
,/* complain_on_overflow */
1542 NULL
, /* special_function */
1543 "R_ARM_TLS_IE32", /* name */
1544 TRUE
, /* partial_inplace */
1545 0xffffffff, /* src_mask */
1546 0xffffffff, /* dst_mask */
1547 FALSE
), /* pcrel_offset */
1549 HOWTO (R_ARM_TLS_LE32
, /* type */
1551 2, /* size (0 = byte, 1 = short, 2 = long) */
1553 FALSE
, /* pc_relative */
1555 complain_overflow_bitfield
,/* complain_on_overflow */
1556 bfd_elf_generic_reloc
, /* special_function */
1557 "R_ARM_TLS_LE32", /* name */
1558 TRUE
, /* partial_inplace */
1559 0xffffffff, /* src_mask */
1560 0xffffffff, /* dst_mask */
1561 FALSE
), /* pcrel_offset */
1563 HOWTO (R_ARM_TLS_LDO12
, /* type */
1565 2, /* size (0 = byte, 1 = short, 2 = long) */
1567 FALSE
, /* pc_relative */
1569 complain_overflow_bitfield
,/* complain_on_overflow */
1570 bfd_elf_generic_reloc
, /* special_function */
1571 "R_ARM_TLS_LDO12", /* name */
1572 FALSE
, /* partial_inplace */
1573 0x00000fff, /* src_mask */
1574 0x00000fff, /* dst_mask */
1575 FALSE
), /* pcrel_offset */
1577 HOWTO (R_ARM_TLS_LE12
, /* type */
1579 2, /* size (0 = byte, 1 = short, 2 = long) */
1581 FALSE
, /* pc_relative */
1583 complain_overflow_bitfield
,/* complain_on_overflow */
1584 bfd_elf_generic_reloc
, /* special_function */
1585 "R_ARM_TLS_LE12", /* name */
1586 FALSE
, /* partial_inplace */
1587 0x00000fff, /* src_mask */
1588 0x00000fff, /* dst_mask */
1589 FALSE
), /* pcrel_offset */
1591 HOWTO (R_ARM_TLS_IE12GP
, /* type */
1593 2, /* size (0 = byte, 1 = short, 2 = long) */
1595 FALSE
, /* pc_relative */
1597 complain_overflow_bitfield
,/* complain_on_overflow */
1598 bfd_elf_generic_reloc
, /* special_function */
1599 "R_ARM_TLS_IE12GP", /* name */
1600 FALSE
, /* partial_inplace */
1601 0x00000fff, /* src_mask */
1602 0x00000fff, /* dst_mask */
1603 FALSE
), /* pcrel_offset */
1606 /* 112-127 private relocations
1607 128 R_ARM_ME_TOO, obsolete
1608 129-255 unallocated in AAELF.
1610 249-255 extended, currently unused, relocations: */
1612 static reloc_howto_type elf32_arm_howto_table_2
[4] =
1614 HOWTO (R_ARM_RREL32
, /* type */
1616 0, /* size (0 = byte, 1 = short, 2 = long) */
1618 FALSE
, /* pc_relative */
1620 complain_overflow_dont
,/* complain_on_overflow */
1621 bfd_elf_generic_reloc
, /* special_function */
1622 "R_ARM_RREL32", /* name */
1623 FALSE
, /* partial_inplace */
1626 FALSE
), /* pcrel_offset */
1628 HOWTO (R_ARM_RABS32
, /* type */
1630 0, /* size (0 = byte, 1 = short, 2 = long) */
1632 FALSE
, /* pc_relative */
1634 complain_overflow_dont
,/* complain_on_overflow */
1635 bfd_elf_generic_reloc
, /* special_function */
1636 "R_ARM_RABS32", /* name */
1637 FALSE
, /* partial_inplace */
1640 FALSE
), /* pcrel_offset */
1642 HOWTO (R_ARM_RPC24
, /* type */
1644 0, /* size (0 = byte, 1 = short, 2 = long) */
1646 FALSE
, /* pc_relative */
1648 complain_overflow_dont
,/* complain_on_overflow */
1649 bfd_elf_generic_reloc
, /* special_function */
1650 "R_ARM_RPC24", /* name */
1651 FALSE
, /* partial_inplace */
1654 FALSE
), /* pcrel_offset */
1656 HOWTO (R_ARM_RBASE
, /* type */
1658 0, /* size (0 = byte, 1 = short, 2 = long) */
1660 FALSE
, /* pc_relative */
1662 complain_overflow_dont
,/* complain_on_overflow */
1663 bfd_elf_generic_reloc
, /* special_function */
1664 "R_ARM_RBASE", /* name */
1665 FALSE
, /* partial_inplace */
1668 FALSE
) /* pcrel_offset */
1671 static reloc_howto_type
*
1672 elf32_arm_howto_from_type (unsigned int r_type
)
1674 if (r_type
< ARRAY_SIZE (elf32_arm_howto_table_1
))
1675 return &elf32_arm_howto_table_1
[r_type
];
1677 if (r_type
>= R_ARM_RREL32
1678 && r_type
< R_ARM_RREL32
+ ARRAY_SIZE (elf32_arm_howto_table_2
))
1679 return &elf32_arm_howto_table_2
[r_type
- R_ARM_RREL32
];
1685 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
1686 Elf_Internal_Rela
* elf_reloc
)
1688 unsigned int r_type
;
1690 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
1691 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
1694 struct elf32_arm_reloc_map
1696 bfd_reloc_code_real_type bfd_reloc_val
;
1697 unsigned char elf_reloc_val
;
1700 /* All entries in this list must also be present in elf32_arm_howto_table. */
1701 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
1703 {BFD_RELOC_NONE
, R_ARM_NONE
},
1704 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
1705 {BFD_RELOC_ARM_PCREL_CALL
, R_ARM_CALL
},
1706 {BFD_RELOC_ARM_PCREL_JUMP
, R_ARM_JUMP24
},
1707 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
1708 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
1709 {BFD_RELOC_32
, R_ARM_ABS32
},
1710 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
1711 {BFD_RELOC_8
, R_ARM_ABS8
},
1712 {BFD_RELOC_16
, R_ARM_ABS16
},
1713 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
1714 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
1715 {BFD_RELOC_THUMB_PCREL_BRANCH25
, R_ARM_THM_JUMP24
},
1716 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_CALL
},
1717 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_JUMP11
},
1718 {BFD_RELOC_THUMB_PCREL_BRANCH20
, R_ARM_THM_JUMP19
},
1719 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_JUMP8
},
1720 {BFD_RELOC_THUMB_PCREL_BRANCH7
, R_ARM_THM_JUMP6
},
1721 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
1722 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
1723 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
1724 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF32
},
1725 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
1726 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
1727 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1728 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
1729 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
1730 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
1731 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
1732 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
},
1733 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1734 {BFD_RELOC_ARM_TLS_GD32
, R_ARM_TLS_GD32
},
1735 {BFD_RELOC_ARM_TLS_LDO32
, R_ARM_TLS_LDO32
},
1736 {BFD_RELOC_ARM_TLS_LDM32
, R_ARM_TLS_LDM32
},
1737 {BFD_RELOC_ARM_TLS_DTPMOD32
, R_ARM_TLS_DTPMOD32
},
1738 {BFD_RELOC_ARM_TLS_DTPOFF32
, R_ARM_TLS_DTPOFF32
},
1739 {BFD_RELOC_ARM_TLS_TPOFF32
, R_ARM_TLS_TPOFF32
},
1740 {BFD_RELOC_ARM_TLS_IE32
, R_ARM_TLS_IE32
},
1741 {BFD_RELOC_ARM_TLS_LE32
, R_ARM_TLS_LE32
},
1742 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
1743 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
},
1744 {BFD_RELOC_ARM_MOVW
, R_ARM_MOVW_ABS_NC
},
1745 {BFD_RELOC_ARM_MOVT
, R_ARM_MOVT_ABS
},
1746 {BFD_RELOC_ARM_MOVW_PCREL
, R_ARM_MOVW_PREL_NC
},
1747 {BFD_RELOC_ARM_MOVT_PCREL
, R_ARM_MOVT_PREL
},
1748 {BFD_RELOC_ARM_THUMB_MOVW
, R_ARM_THM_MOVW_ABS_NC
},
1749 {BFD_RELOC_ARM_THUMB_MOVT
, R_ARM_THM_MOVT_ABS
},
1750 {BFD_RELOC_ARM_THUMB_MOVW_PCREL
, R_ARM_THM_MOVW_PREL_NC
},
1751 {BFD_RELOC_ARM_THUMB_MOVT_PCREL
, R_ARM_THM_MOVT_PREL
},
1752 {BFD_RELOC_ARM_ALU_PC_G0_NC
, R_ARM_ALU_PC_G0_NC
},
1753 {BFD_RELOC_ARM_ALU_PC_G0
, R_ARM_ALU_PC_G0
},
1754 {BFD_RELOC_ARM_ALU_PC_G1_NC
, R_ARM_ALU_PC_G1_NC
},
1755 {BFD_RELOC_ARM_ALU_PC_G1
, R_ARM_ALU_PC_G1
},
1756 {BFD_RELOC_ARM_ALU_PC_G2
, R_ARM_ALU_PC_G2
},
1757 {BFD_RELOC_ARM_LDR_PC_G0
, R_ARM_LDR_PC_G0
},
1758 {BFD_RELOC_ARM_LDR_PC_G1
, R_ARM_LDR_PC_G1
},
1759 {BFD_RELOC_ARM_LDR_PC_G2
, R_ARM_LDR_PC_G2
},
1760 {BFD_RELOC_ARM_LDRS_PC_G0
, R_ARM_LDRS_PC_G0
},
1761 {BFD_RELOC_ARM_LDRS_PC_G1
, R_ARM_LDRS_PC_G1
},
1762 {BFD_RELOC_ARM_LDRS_PC_G2
, R_ARM_LDRS_PC_G2
},
1763 {BFD_RELOC_ARM_LDC_PC_G0
, R_ARM_LDC_PC_G0
},
1764 {BFD_RELOC_ARM_LDC_PC_G1
, R_ARM_LDC_PC_G1
},
1765 {BFD_RELOC_ARM_LDC_PC_G2
, R_ARM_LDC_PC_G2
},
1766 {BFD_RELOC_ARM_ALU_SB_G0_NC
, R_ARM_ALU_SB_G0_NC
},
1767 {BFD_RELOC_ARM_ALU_SB_G0
, R_ARM_ALU_SB_G0
},
1768 {BFD_RELOC_ARM_ALU_SB_G1_NC
, R_ARM_ALU_SB_G1_NC
},
1769 {BFD_RELOC_ARM_ALU_SB_G1
, R_ARM_ALU_SB_G1
},
1770 {BFD_RELOC_ARM_ALU_SB_G2
, R_ARM_ALU_SB_G2
},
1771 {BFD_RELOC_ARM_LDR_SB_G0
, R_ARM_LDR_SB_G0
},
1772 {BFD_RELOC_ARM_LDR_SB_G1
, R_ARM_LDR_SB_G1
},
1773 {BFD_RELOC_ARM_LDR_SB_G2
, R_ARM_LDR_SB_G2
},
1774 {BFD_RELOC_ARM_LDRS_SB_G0
, R_ARM_LDRS_SB_G0
},
1775 {BFD_RELOC_ARM_LDRS_SB_G1
, R_ARM_LDRS_SB_G1
},
1776 {BFD_RELOC_ARM_LDRS_SB_G2
, R_ARM_LDRS_SB_G2
},
1777 {BFD_RELOC_ARM_LDC_SB_G0
, R_ARM_LDC_SB_G0
},
1778 {BFD_RELOC_ARM_LDC_SB_G1
, R_ARM_LDC_SB_G1
},
1779 {BFD_RELOC_ARM_LDC_SB_G2
, R_ARM_LDC_SB_G2
},
1780 {BFD_RELOC_ARM_V4BX
, R_ARM_V4BX
}
1783 static reloc_howto_type
*
1784 elf32_arm_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1785 bfd_reloc_code_real_type code
)
1789 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_reloc_map
); i
++)
1790 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
1791 return elf32_arm_howto_from_type (elf32_arm_reloc_map
[i
].elf_reloc_val
);
1796 static reloc_howto_type
*
1797 elf32_arm_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1802 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_1
); i
++)
1803 if (elf32_arm_howto_table_1
[i
].name
!= NULL
1804 && strcasecmp (elf32_arm_howto_table_1
[i
].name
, r_name
) == 0)
1805 return &elf32_arm_howto_table_1
[i
];
1807 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_2
); i
++)
1808 if (elf32_arm_howto_table_2
[i
].name
!= NULL
1809 && strcasecmp (elf32_arm_howto_table_2
[i
].name
, r_name
) == 0)
1810 return &elf32_arm_howto_table_2
[i
];
1815 /* Support for core dump NOTE sections. */
1818 elf32_arm_nabi_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1823 switch (note
->descsz
)
1828 case 148: /* Linux/ARM 32-bit. */
1830 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
1833 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
1842 /* Make a ".reg/999" section. */
1843 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
1844 size
, note
->descpos
+ offset
);
1848 elf32_arm_nabi_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
1850 switch (note
->descsz
)
1855 case 124: /* Linux/ARM elf_prpsinfo. */
1856 elf_tdata (abfd
)->core_program
1857 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
1858 elf_tdata (abfd
)->core_command
1859 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
1862 /* Note that for some reason, a spurious space is tacked
1863 onto the end of the args in some (at least one anyway)
1864 implementations, so strip it off if it exists. */
1866 char *command
= elf_tdata (abfd
)->core_command
;
1867 int n
= strlen (command
);
1869 if (0 < n
&& command
[n
- 1] == ' ')
1870 command
[n
- 1] = '\0';
1876 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1877 #define TARGET_LITTLE_NAME "elf32-littlearm"
1878 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1879 #define TARGET_BIG_NAME "elf32-bigarm"
1881 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1882 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1884 typedef unsigned long int insn32
;
1885 typedef unsigned short int insn16
;
1887 /* In lieu of proper flags, assume all EABIv4 or later objects are
1889 #define INTERWORK_FLAG(abfd) \
1890 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1891 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
1892 || ((abfd)->flags & BFD_LINKER_CREATED))
1894 /* The linker script knows the section names for placement.
1895 The entry_names are used to do simple name mangling on the stubs.
1896 Given a function name, and its type, the stub can be found. The
1897 name can be changed. The only requirement is the %s be present. */
1898 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1899 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1901 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1902 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1904 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1905 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1907 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1908 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1910 #define STUB_ENTRY_NAME "__%s_veneer"
1912 /* The name of the dynamic interpreter. This is put in the .interp
1914 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1916 #ifdef FOUR_WORD_PLT
1918 /* The first entry in a procedure linkage table looks like
1919 this. It is set up so that any shared library function that is
1920 called before the relocation has been set up calls the dynamic
1922 static const bfd_vma elf32_arm_plt0_entry
[] =
1924 0xe52de004, /* str lr, [sp, #-4]! */
1925 0xe59fe010, /* ldr lr, [pc, #16] */
1926 0xe08fe00e, /* add lr, pc, lr */
1927 0xe5bef008, /* ldr pc, [lr, #8]! */
1930 /* Subsequent entries in a procedure linkage table look like
1932 static const bfd_vma elf32_arm_plt_entry
[] =
1934 0xe28fc600, /* add ip, pc, #NN */
1935 0xe28cca00, /* add ip, ip, #NN */
1936 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1937 0x00000000, /* unused */
1942 /* The first entry in a procedure linkage table looks like
1943 this. It is set up so that any shared library function that is
1944 called before the relocation has been set up calls the dynamic
1946 static const bfd_vma elf32_arm_plt0_entry
[] =
1948 0xe52de004, /* str lr, [sp, #-4]! */
1949 0xe59fe004, /* ldr lr, [pc, #4] */
1950 0xe08fe00e, /* add lr, pc, lr */
1951 0xe5bef008, /* ldr pc, [lr, #8]! */
1952 0x00000000, /* &GOT[0] - . */
1955 /* Subsequent entries in a procedure linkage table look like
1957 static const bfd_vma elf32_arm_plt_entry
[] =
1959 0xe28fc600, /* add ip, pc, #0xNN00000 */
1960 0xe28cca00, /* add ip, ip, #0xNN000 */
1961 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1966 /* The format of the first entry in the procedure linkage table
1967 for a VxWorks executable. */
1968 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry
[] =
1970 0xe52dc008, /* str ip,[sp,#-8]! */
1971 0xe59fc000, /* ldr ip,[pc] */
1972 0xe59cf008, /* ldr pc,[ip,#8] */
1973 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1976 /* The format of subsequent entries in a VxWorks executable. */
1977 static const bfd_vma elf32_arm_vxworks_exec_plt_entry
[] =
1979 0xe59fc000, /* ldr ip,[pc] */
1980 0xe59cf000, /* ldr pc,[ip] */
1981 0x00000000, /* .long @got */
1982 0xe59fc000, /* ldr ip,[pc] */
1983 0xea000000, /* b _PLT */
1984 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1987 /* The format of entries in a VxWorks shared library. */
1988 static const bfd_vma elf32_arm_vxworks_shared_plt_entry
[] =
1990 0xe59fc000, /* ldr ip,[pc] */
1991 0xe79cf009, /* ldr pc,[ip,r9] */
1992 0x00000000, /* .long @got */
1993 0xe59fc000, /* ldr ip,[pc] */
1994 0xe599f008, /* ldr pc,[r9,#8] */
1995 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1998 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1999 #define PLT_THUMB_STUB_SIZE 4
2000 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
2006 /* The entries in a PLT when using a DLL-based target with multiple
2008 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
2010 0xe51ff004, /* ldr pc, [pc, #-4] */
2011 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2014 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2015 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2016 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2017 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2018 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2019 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2029 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2030 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2031 is inserted in arm_build_one_stub(). */
2032 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2033 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2034 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2035 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2036 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2037 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2042 enum stub_insn_type type
;
2043 unsigned int r_type
;
2047 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2048 to reach the stub if necessary. */
2049 static const insn_sequence elf32_arm_stub_long_branch_any_any
[] =
2051 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2052 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2055 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2057 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb
[] =
2059 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2060 ARM_INSN(0xe12fff1c), /* bx ip */
2061 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2064 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2065 static const insn_sequence elf32_arm_stub_long_branch_thumb_only
[] =
2067 THUMB16_INSN(0xb401), /* push {r0} */
2068 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2069 THUMB16_INSN(0x4684), /* mov ip, r0 */
2070 THUMB16_INSN(0xbc01), /* pop {r0} */
2071 THUMB16_INSN(0x4760), /* bx ip */
2072 THUMB16_INSN(0xbf00), /* nop */
2073 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2076 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2078 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb
[] =
2080 THUMB16_INSN(0x4778), /* bx pc */
2081 THUMB16_INSN(0x46c0), /* nop */
2082 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2083 ARM_INSN(0xe12fff1c), /* bx ip */
2084 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2087 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2089 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm
[] =
2091 THUMB16_INSN(0x4778), /* bx pc */
2092 THUMB16_INSN(0x46c0), /* nop */
2093 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2094 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2097 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2098 one, when the destination is close enough. */
2099 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm
[] =
2101 THUMB16_INSN(0x4778), /* bx pc */
2102 THUMB16_INSN(0x46c0), /* nop */
2103 ARM_REL_INSN(0xea000000, -8), /* b (X-8) */
2106 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2107 blx to reach the stub if necessary. */
2108 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic
[] =
2110 ARM_INSN(0xe59fc000), /* ldr r12, [pc] */
2111 ARM_INSN(0xe08ff00c), /* add pc, pc, ip */
2112 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2115 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2116 blx to reach the stub if necessary. We can not add into pc;
2117 it is not guaranteed to mode switch (different in ARMv6 and
2119 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic
[] =
2121 ARM_INSN(0xe59fc004), /* ldr r12, [pc, #4] */
2122 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2123 ARM_INSN(0xe12fff1c), /* bx ip */
2124 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2127 /* V4T ARM -> ARM long branch stub, PIC. */
2128 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic
[] =
2130 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2131 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2132 ARM_INSN(0xe12fff1c), /* bx ip */
2133 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2136 /* V4T Thumb -> ARM long branch stub, PIC. */
2137 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic
[] =
2139 THUMB16_INSN(0x4778), /* bx pc */
2140 THUMB16_INSN(0x46c0), /* nop */
2141 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2142 ARM_INSN(0xe08cf00f), /* add pc, ip, pc */
2143 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2146 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2148 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic
[] =
2150 THUMB16_INSN(0xb401), /* push {r0} */
2151 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2152 THUMB16_INSN(0x46fc), /* mov ip, pc */
2153 THUMB16_INSN(0x4484), /* add ip, r0 */
2154 THUMB16_INSN(0xbc01), /* pop {r0} */
2155 THUMB16_INSN(0x4760), /* bx ip */
2156 DATA_WORD(0, R_ARM_REL32
, 4), /* dcd R_ARM_REL32(X) */
2159 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2161 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic
[] =
2163 THUMB16_INSN(0x4778), /* bx pc */
2164 THUMB16_INSN(0x46c0), /* nop */
2165 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2166 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2167 ARM_INSN(0xe12fff1c), /* bx ip */
2168 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2171 /* Cortex-A8 erratum-workaround stubs. */
2173 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2174 can't use a conditional branch to reach this stub). */
2176 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond
[] =
2178 THUMB16_BCOND_INSN(0xd001), /* b<cond>.n true. */
2179 THUMB32_B_INSN(0xf000b800, -4), /* b.w insn_after_original_branch. */
2180 THUMB32_B_INSN(0xf000b800, -4) /* true: b.w original_branch_dest. */
2183 /* Stub used for b.w and bl.w instructions. */
2185 static const insn_sequence elf32_arm_stub_a8_veneer_b
[] =
2187 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2190 static const insn_sequence elf32_arm_stub_a8_veneer_bl
[] =
2192 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2195 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2196 instruction (which switches to ARM mode) to point to this stub. Jump to the
2197 real destination using an ARM-mode branch. */
2199 static const insn_sequence elf32_arm_stub_a8_veneer_blx
[] =
2201 ARM_REL_INSN(0xea000000, -8) /* b original_branch_dest. */
2204 /* Section name for stubs is the associated section name plus this
2206 #define STUB_SUFFIX ".stub"
2208 /* One entry per long/short branch stub defined above. */
2210 DEF_STUB(long_branch_any_any) \
2211 DEF_STUB(long_branch_v4t_arm_thumb) \
2212 DEF_STUB(long_branch_thumb_only) \
2213 DEF_STUB(long_branch_v4t_thumb_thumb) \
2214 DEF_STUB(long_branch_v4t_thumb_arm) \
2215 DEF_STUB(short_branch_v4t_thumb_arm) \
2216 DEF_STUB(long_branch_any_arm_pic) \
2217 DEF_STUB(long_branch_any_thumb_pic) \
2218 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2219 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2220 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2221 DEF_STUB(long_branch_thumb_only_pic) \
2222 DEF_STUB(a8_veneer_b_cond) \
2223 DEF_STUB(a8_veneer_b) \
2224 DEF_STUB(a8_veneer_bl) \
2225 DEF_STUB(a8_veneer_blx)
2227 #define DEF_STUB(x) arm_stub_##x,
2228 enum elf32_arm_stub_type
{
2236 const insn_sequence
* template;
2240 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2241 static const stub_def stub_definitions
[] = {
2246 struct elf32_arm_stub_hash_entry
2248 /* Base hash table entry structure. */
2249 struct bfd_hash_entry root
;
2251 /* The stub section. */
2254 /* Offset within stub_sec of the beginning of this stub. */
2255 bfd_vma stub_offset
;
2257 /* Given the symbol's value and its section we can determine its final
2258 value when building the stubs (so the stub knows where to jump). */
2259 bfd_vma target_value
;
2260 asection
*target_section
;
2262 /* Offset to apply to relocation referencing target_value. */
2263 bfd_vma target_addend
;
2265 /* The instruction which caused this stub to be generated (only valid for
2266 Cortex-A8 erratum workaround stubs at present). */
2267 unsigned long orig_insn
;
2269 /* The stub type. */
2270 enum elf32_arm_stub_type stub_type
;
2271 /* Its encoding size in bytes. */
2274 const insn_sequence
*stub_template
;
2275 /* The size of the template (number of entries). */
2276 int stub_template_size
;
2278 /* The symbol table entry, if any, that this was derived from. */
2279 struct elf32_arm_link_hash_entry
*h
;
2281 /* Destination symbol type (STT_ARM_TFUNC, ...) */
2282 unsigned char st_type
;
2284 /* Where this stub is being called from, or, in the case of combined
2285 stub sections, the first input section in the group. */
2288 /* The name for the local symbol at the start of this stub. The
2289 stub name in the hash table has to be unique; this does not, so
2290 it can be friendlier. */
2294 /* Used to build a map of a section. This is required for mixed-endian
2297 typedef struct elf32_elf_section_map
2302 elf32_arm_section_map
;
2304 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2308 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
,
2309 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
,
2310 VFP11_ERRATUM_ARM_VENEER
,
2311 VFP11_ERRATUM_THUMB_VENEER
2313 elf32_vfp11_erratum_type
;
2315 typedef struct elf32_vfp11_erratum_list
2317 struct elf32_vfp11_erratum_list
*next
;
2323 struct elf32_vfp11_erratum_list
*veneer
;
2324 unsigned int vfp_insn
;
2328 struct elf32_vfp11_erratum_list
*branch
;
2332 elf32_vfp11_erratum_type type
;
2334 elf32_vfp11_erratum_list
;
2339 INSERT_EXIDX_CANTUNWIND_AT_END
2341 arm_unwind_edit_type
;
2343 /* A (sorted) list of edits to apply to an unwind table. */
2344 typedef struct arm_unwind_table_edit
2346 arm_unwind_edit_type type
;
2347 /* Note: we sometimes want to insert an unwind entry corresponding to a
2348 section different from the one we're currently writing out, so record the
2349 (text) section this edit relates to here. */
2350 asection
*linked_section
;
2352 struct arm_unwind_table_edit
*next
;
2354 arm_unwind_table_edit
;
2356 typedef struct _arm_elf_section_data
2358 /* Information about mapping symbols. */
2359 struct bfd_elf_section_data elf
;
2360 unsigned int mapcount
;
2361 unsigned int mapsize
;
2362 elf32_arm_section_map
*map
;
2363 /* Information about CPU errata. */
2364 unsigned int erratumcount
;
2365 elf32_vfp11_erratum_list
*erratumlist
;
2366 /* Information about unwind tables. */
2369 /* Unwind info attached to a text section. */
2372 asection
*arm_exidx_sec
;
2375 /* Unwind info attached to an .ARM.exidx section. */
2378 arm_unwind_table_edit
*unwind_edit_list
;
2379 arm_unwind_table_edit
*unwind_edit_tail
;
2383 _arm_elf_section_data
;
2385 #define elf32_arm_section_data(sec) \
2386 ((_arm_elf_section_data *) elf_section_data (sec))
2388 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2389 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2390 so may be created multiple times: we use an array of these entries whilst
2391 relaxing which we can refresh easily, then create stubs for each potentially
2392 erratum-triggering instruction once we've settled on a solution. */
2394 struct a8_erratum_fix
{
2399 unsigned long orig_insn
;
2401 enum elf32_arm_stub_type stub_type
;
2404 /* A table of relocs applied to branches which might trigger Cortex-A8
2407 struct a8_erratum_reloc
{
2409 bfd_vma destination
;
2410 unsigned int r_type
;
2411 unsigned char st_type
;
2412 const char *sym_name
;
2413 bfd_boolean non_a8_stub
;
2416 /* The size of the thread control block. */
2419 struct elf_arm_obj_tdata
2421 struct elf_obj_tdata root
;
2423 /* tls_type for each local got entry. */
2424 char *local_got_tls_type
;
2426 /* Zero to warn when linking objects with incompatible enum sizes. */
2427 int no_enum_size_warning
;
2429 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2430 int no_wchar_size_warning
;
2433 #define elf_arm_tdata(bfd) \
2434 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2436 #define elf32_arm_local_got_tls_type(bfd) \
2437 (elf_arm_tdata (bfd)->local_got_tls_type)
2439 #define is_arm_elf(bfd) \
2440 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2441 && elf_tdata (bfd) != NULL \
2442 && elf_object_id (bfd) == ARM_ELF_TDATA)
2445 elf32_arm_mkobject (bfd
*abfd
)
2447 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2451 /* The ARM linker needs to keep track of the number of relocs that it
2452 decides to copy in check_relocs for each symbol. This is so that
2453 it can discard PC relative relocs if it doesn't need them when
2454 linking with -Bsymbolic. We store the information in a field
2455 extending the regular ELF linker hash table. */
2457 /* This structure keeps track of the number of relocs we have copied
2458 for a given symbol. */
2459 struct elf32_arm_relocs_copied
2462 struct elf32_arm_relocs_copied
* next
;
2463 /* A section in dynobj. */
2465 /* Number of relocs copied in this section. */
2466 bfd_size_type count
;
2467 /* Number of PC-relative relocs copied in this section. */
2468 bfd_size_type pc_count
;
2471 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2473 /* Arm ELF linker hash entry. */
2474 struct elf32_arm_link_hash_entry
2476 struct elf_link_hash_entry root
;
2478 /* Number of PC relative relocs copied for this symbol. */
2479 struct elf32_arm_relocs_copied
* relocs_copied
;
2481 /* We reference count Thumb references to a PLT entry separately,
2482 so that we can emit the Thumb trampoline only if needed. */
2483 bfd_signed_vma plt_thumb_refcount
;
2485 /* Some references from Thumb code may be eliminated by BL->BLX
2486 conversion, so record them separately. */
2487 bfd_signed_vma plt_maybe_thumb_refcount
;
2489 /* Since PLT entries have variable size if the Thumb prologue is
2490 used, we need to record the index into .got.plt instead of
2491 recomputing it from the PLT offset. */
2492 bfd_signed_vma plt_got_offset
;
2494 #define GOT_UNKNOWN 0
2495 #define GOT_NORMAL 1
2496 #define GOT_TLS_GD 2
2497 #define GOT_TLS_IE 4
2498 unsigned char tls_type
;
2500 /* The symbol marking the real symbol location for exported thumb
2501 symbols with Arm stubs. */
2502 struct elf_link_hash_entry
*export_glue
;
2504 /* A pointer to the most recently used stub hash entry against this
2506 struct elf32_arm_stub_hash_entry
*stub_cache
;
2509 /* Traverse an arm ELF linker hash table. */
2510 #define elf32_arm_link_hash_traverse(table, func, info) \
2511 (elf_link_hash_traverse \
2513 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2516 /* Get the ARM elf linker hash table from a link_info structure. */
2517 #define elf32_arm_hash_table(info) \
2518 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2520 #define arm_stub_hash_lookup(table, string, create, copy) \
2521 ((struct elf32_arm_stub_hash_entry *) \
2522 bfd_hash_lookup ((table), (string), (create), (copy)))
2524 /* ARM ELF linker hash table. */
2525 struct elf32_arm_link_hash_table
2527 /* The main hash table. */
2528 struct elf_link_hash_table root
;
2530 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2531 bfd_size_type thumb_glue_size
;
2533 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2534 bfd_size_type arm_glue_size
;
2536 /* The size in bytes of section containing the ARMv4 BX veneers. */
2537 bfd_size_type bx_glue_size
;
2539 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2540 veneer has been populated. */
2541 bfd_vma bx_glue_offset
[15];
2543 /* The size in bytes of the section containing glue for VFP11 erratum
2545 bfd_size_type vfp11_erratum_glue_size
;
2547 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2548 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2549 elf32_arm_write_section(). */
2550 struct a8_erratum_fix
*a8_erratum_fixes
;
2551 unsigned int num_a8_erratum_fixes
;
2553 /* An arbitrary input BFD chosen to hold the glue sections. */
2554 bfd
* bfd_of_glue_owner
;
2556 /* Nonzero to output a BE8 image. */
2559 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2560 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2563 /* The relocation to use for R_ARM_TARGET2 relocations. */
2566 /* 0 = Ignore R_ARM_V4BX.
2567 1 = Convert BX to MOV PC.
2568 2 = Generate v4 interworing stubs. */
2571 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2574 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2577 /* What sort of code sequences we should look for which may trigger the
2578 VFP11 denorm erratum. */
2579 bfd_arm_vfp11_fix vfp11_fix
;
2581 /* Global counter for the number of fixes we have emitted. */
2582 int num_vfp11_fixes
;
2584 /* Nonzero to force PIC branch veneers. */
2587 /* The number of bytes in the initial entry in the PLT. */
2588 bfd_size_type plt_header_size
;
2590 /* The number of bytes in the subsequent PLT etries. */
2591 bfd_size_type plt_entry_size
;
2593 /* True if the target system is VxWorks. */
2596 /* True if the target system is Symbian OS. */
2599 /* True if the target uses REL relocations. */
2602 /* Short-cuts to get to dynamic linker sections. */
2611 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2614 /* Data for R_ARM_TLS_LDM32 relocations. */
2617 bfd_signed_vma refcount
;
2621 /* Small local sym to section mapping cache. */
2622 struct sym_sec_cache sym_sec
;
2624 /* For convenience in allocate_dynrelocs. */
2627 /* The stub hash table. */
2628 struct bfd_hash_table stub_hash_table
;
2630 /* Linker stub bfd. */
2633 /* Linker call-backs. */
2634 asection
* (*add_stub_section
) (const char *, asection
*);
2635 void (*layout_sections_again
) (void);
2637 /* Array to keep track of which stub sections have been created, and
2638 information on stub grouping. */
2641 /* This is the section to which stubs in the group will be
2644 /* The stub section. */
2648 /* Assorted information used by elf32_arm_size_stubs. */
2649 unsigned int bfd_count
;
2651 asection
**input_list
;
2654 /* Create an entry in an ARM ELF linker hash table. */
2656 static struct bfd_hash_entry
*
2657 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
2658 struct bfd_hash_table
* table
,
2659 const char * string
)
2661 struct elf32_arm_link_hash_entry
* ret
=
2662 (struct elf32_arm_link_hash_entry
*) entry
;
2664 /* Allocate the structure if it has not already been allocated by a
2667 ret
= bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
2669 return (struct bfd_hash_entry
*) ret
;
2671 /* Call the allocation method of the superclass. */
2672 ret
= ((struct elf32_arm_link_hash_entry
*)
2673 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2677 ret
->relocs_copied
= NULL
;
2678 ret
->tls_type
= GOT_UNKNOWN
;
2679 ret
->plt_thumb_refcount
= 0;
2680 ret
->plt_maybe_thumb_refcount
= 0;
2681 ret
->plt_got_offset
= -1;
2682 ret
->export_glue
= NULL
;
2684 ret
->stub_cache
= NULL
;
2687 return (struct bfd_hash_entry
*) ret
;
2690 /* Initialize an entry in the stub hash table. */
2692 static struct bfd_hash_entry
*
2693 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2694 struct bfd_hash_table
*table
,
2697 /* Allocate the structure if it has not already been allocated by a
2701 entry
= bfd_hash_allocate (table
,
2702 sizeof (struct elf32_arm_stub_hash_entry
));
2707 /* Call the allocation method of the superclass. */
2708 entry
= bfd_hash_newfunc (entry
, table
, string
);
2711 struct elf32_arm_stub_hash_entry
*eh
;
2713 /* Initialize the local fields. */
2714 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
2715 eh
->stub_sec
= NULL
;
2716 eh
->stub_offset
= 0;
2717 eh
->target_value
= 0;
2718 eh
->target_section
= NULL
;
2719 eh
->stub_type
= arm_stub_none
;
2721 eh
->stub_template
= NULL
;
2722 eh
->stub_template_size
= 0;
2730 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2731 shortcuts to them in our hash table. */
2734 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
2736 struct elf32_arm_link_hash_table
*htab
;
2738 htab
= elf32_arm_hash_table (info
);
2739 /* BPABI objects never have a GOT, or associated sections. */
2740 if (htab
->symbian_p
)
2743 if (! _bfd_elf_create_got_section (dynobj
, info
))
2746 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
2747 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
2748 if (!htab
->sgot
|| !htab
->sgotplt
)
2751 htab
->srelgot
= bfd_make_section_with_flags (dynobj
,
2752 RELOC_SECTION (htab
, ".got"),
2753 (SEC_ALLOC
| SEC_LOAD
2756 | SEC_LINKER_CREATED
2758 if (htab
->srelgot
== NULL
2759 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
2764 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2765 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2769 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
2771 struct elf32_arm_link_hash_table
*htab
;
2773 htab
= elf32_arm_hash_table (info
);
2774 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
2777 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
2780 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
2781 htab
->srelplt
= bfd_get_section_by_name (dynobj
,
2782 RELOC_SECTION (htab
, ".plt"));
2783 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
2785 htab
->srelbss
= bfd_get_section_by_name (dynobj
,
2786 RELOC_SECTION (htab
, ".bss"));
2788 if (htab
->vxworks_p
)
2790 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
2795 htab
->plt_header_size
= 0;
2796 htab
->plt_entry_size
2797 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
2801 htab
->plt_header_size
2802 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
2803 htab
->plt_entry_size
2804 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
2811 || (!info
->shared
&& !htab
->srelbss
))
2817 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2820 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
2821 struct elf_link_hash_entry
*dir
,
2822 struct elf_link_hash_entry
*ind
)
2824 struct elf32_arm_link_hash_entry
*edir
, *eind
;
2826 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
2827 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
2829 if (eind
->relocs_copied
!= NULL
)
2831 if (edir
->relocs_copied
!= NULL
)
2833 struct elf32_arm_relocs_copied
**pp
;
2834 struct elf32_arm_relocs_copied
*p
;
2836 /* Add reloc counts against the indirect sym to the direct sym
2837 list. Merge any entries against the same section. */
2838 for (pp
= &eind
->relocs_copied
; (p
= *pp
) != NULL
; )
2840 struct elf32_arm_relocs_copied
*q
;
2842 for (q
= edir
->relocs_copied
; q
!= NULL
; q
= q
->next
)
2843 if (q
->section
== p
->section
)
2845 q
->pc_count
+= p
->pc_count
;
2846 q
->count
+= p
->count
;
2853 *pp
= edir
->relocs_copied
;
2856 edir
->relocs_copied
= eind
->relocs_copied
;
2857 eind
->relocs_copied
= NULL
;
2860 if (ind
->root
.type
== bfd_link_hash_indirect
)
2862 /* Copy over PLT info. */
2863 edir
->plt_thumb_refcount
+= eind
->plt_thumb_refcount
;
2864 eind
->plt_thumb_refcount
= 0;
2865 edir
->plt_maybe_thumb_refcount
+= eind
->plt_maybe_thumb_refcount
;
2866 eind
->plt_maybe_thumb_refcount
= 0;
2868 if (dir
->got
.refcount
<= 0)
2870 edir
->tls_type
= eind
->tls_type
;
2871 eind
->tls_type
= GOT_UNKNOWN
;
2875 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2878 /* Create an ARM elf linker hash table. */
2880 static struct bfd_link_hash_table
*
2881 elf32_arm_link_hash_table_create (bfd
*abfd
)
2883 struct elf32_arm_link_hash_table
*ret
;
2884 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
2886 ret
= bfd_malloc (amt
);
2890 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
2891 elf32_arm_link_hash_newfunc
,
2892 sizeof (struct elf32_arm_link_hash_entry
)))
2899 ret
->sgotplt
= NULL
;
2900 ret
->srelgot
= NULL
;
2902 ret
->srelplt
= NULL
;
2903 ret
->sdynbss
= NULL
;
2904 ret
->srelbss
= NULL
;
2905 ret
->srelplt2
= NULL
;
2906 ret
->thumb_glue_size
= 0;
2907 ret
->arm_glue_size
= 0;
2908 ret
->bx_glue_size
= 0;
2909 memset (ret
->bx_glue_offset
, 0, sizeof (ret
->bx_glue_offset
));
2910 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
2911 ret
->vfp11_erratum_glue_size
= 0;
2912 ret
->num_vfp11_fixes
= 0;
2913 ret
->fix_cortex_a8
= 0;
2914 ret
->bfd_of_glue_owner
= NULL
;
2915 ret
->byteswap_code
= 0;
2916 ret
->target1_is_rel
= 0;
2917 ret
->target2_reloc
= R_ARM_NONE
;
2918 #ifdef FOUR_WORD_PLT
2919 ret
->plt_header_size
= 16;
2920 ret
->plt_entry_size
= 16;
2922 ret
->plt_header_size
= 20;
2923 ret
->plt_entry_size
= 12;
2930 ret
->sym_sec
.abfd
= NULL
;
2932 ret
->tls_ldm_got
.refcount
= 0;
2933 ret
->stub_bfd
= NULL
;
2934 ret
->add_stub_section
= NULL
;
2935 ret
->layout_sections_again
= NULL
;
2936 ret
->stub_group
= NULL
;
2939 ret
->input_list
= NULL
;
2941 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2942 sizeof (struct elf32_arm_stub_hash_entry
)))
2948 return &ret
->root
.root
;
2951 /* Free the derived linker hash table. */
2954 elf32_arm_hash_table_free (struct bfd_link_hash_table
*hash
)
2956 struct elf32_arm_link_hash_table
*ret
2957 = (struct elf32_arm_link_hash_table
*) hash
;
2959 bfd_hash_table_free (&ret
->stub_hash_table
);
2960 _bfd_generic_link_hash_table_free (hash
);
2963 /* Determine if we're dealing with a Thumb only architecture. */
2966 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
2968 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2972 if (arch
!= TAG_CPU_ARCH_V7
)
2975 profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2976 Tag_CPU_arch_profile
);
2978 return profile
== 'M';
2981 /* Determine if we're dealing with a Thumb-2 object. */
2984 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
2986 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2988 return arch
== TAG_CPU_ARCH_V6T2
|| arch
>= TAG_CPU_ARCH_V7
;
2992 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
2996 case arm_stub_long_branch_thumb_only
:
2997 case arm_stub_long_branch_v4t_thumb_arm
:
2998 case arm_stub_short_branch_v4t_thumb_arm
:
2999 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3000 case arm_stub_long_branch_thumb_only_pic
:
3011 /* Determine the type of stub needed, if any, for a call. */
3013 static enum elf32_arm_stub_type
3014 arm_type_of_stub (struct bfd_link_info
*info
,
3015 asection
*input_sec
,
3016 const Elf_Internal_Rela
*rel
,
3017 unsigned char st_type
,
3018 struct elf32_arm_link_hash_entry
*hash
,
3019 bfd_vma destination
,
3025 bfd_signed_vma branch_offset
;
3026 unsigned int r_type
;
3027 struct elf32_arm_link_hash_table
* globals
;
3030 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3033 /* We don't know the actual type of destination in case it is of
3034 type STT_SECTION: give up. */
3035 if (st_type
== STT_SECTION
)
3038 globals
= elf32_arm_hash_table (info
);
3040 thumb_only
= using_thumb_only (globals
);
3042 thumb2
= using_thumb2 (globals
);
3044 /* Determine where the call point is. */
3045 location
= (input_sec
->output_offset
3046 + input_sec
->output_section
->vma
3049 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3051 r_type
= ELF32_R_TYPE (rel
->r_info
);
3053 /* Keep a simpler condition, for the sake of clarity. */
3054 if (globals
->splt
!= NULL
&& hash
!= NULL
&& hash
->root
.plt
.offset
!= (bfd_vma
) -1)
3057 /* Note when dealing with PLT entries: the main PLT stub is in
3058 ARM mode, so if the branch is in Thumb mode, another
3059 Thumb->ARM stub will be inserted later just before the ARM
3060 PLT stub. We don't take this extra distance into account
3061 here, because if a long branch stub is needed, we'll add a
3062 Thumb->Arm one and branch directly to the ARM PLT entry
3063 because it avoids spreading offset corrections in several
3067 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
3069 /* Handle cases where:
3070 - this call goes too far (different Thumb/Thumb2 max
3072 - it's a Thumb->Arm call and blx is not available, or it's a
3073 Thumb->Arm branch (not bl). A stub is needed in this case,
3074 but only if this call is not through a PLT entry. Indeed,
3075 PLT stubs handle mode switching already.
3078 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3079 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3081 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3082 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3083 || ((st_type
!= STT_ARM_TFUNC
)
3084 && (((r_type
== R_ARM_THM_CALL
) && !globals
->use_blx
)
3085 || (r_type
== R_ARM_THM_JUMP24
))
3088 if (st_type
== STT_ARM_TFUNC
)
3090 /* Thumb to thumb. */
3093 stub_type
= (info
->shared
| globals
->pic_veneer
)
3095 ? ((globals
->use_blx
3096 && (r_type
==R_ARM_THM_CALL
))
3097 /* V5T and above. Stub starts with ARM code, so
3098 we must be able to switch mode before
3099 reaching it, which is only possible for 'bl'
3100 (ie R_ARM_THM_CALL relocation). */
3101 ? arm_stub_long_branch_any_thumb_pic
3102 /* On V4T, use Thumb code only. */
3103 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
3105 /* non-PIC stubs. */
3106 : ((globals
->use_blx
3107 && (r_type
==R_ARM_THM_CALL
))
3108 /* V5T and above. */
3109 ? arm_stub_long_branch_any_any
3111 : arm_stub_long_branch_v4t_thumb_thumb
);
3115 stub_type
= (info
->shared
| globals
->pic_veneer
)
3117 ? arm_stub_long_branch_thumb_only_pic
3119 : arm_stub_long_branch_thumb_only
;
3126 && sym_sec
->owner
!= NULL
3127 && !INTERWORK_FLAG (sym_sec
->owner
))
3129 (*_bfd_error_handler
)
3130 (_("%B(%s): warning: interworking not enabled.\n"
3131 " first occurrence: %B: Thumb call to ARM"),
3132 sym_sec
->owner
, input_bfd
, name
);
3135 stub_type
= (info
->shared
| globals
->pic_veneer
)
3137 ? ((globals
->use_blx
3138 && (r_type
==R_ARM_THM_CALL
))
3139 /* V5T and above. */
3140 ? arm_stub_long_branch_any_arm_pic
3142 : arm_stub_long_branch_v4t_thumb_arm_pic
)
3144 /* non-PIC stubs. */
3145 : ((globals
->use_blx
3146 && (r_type
==R_ARM_THM_CALL
))
3147 /* V5T and above. */
3148 ? arm_stub_long_branch_any_any
3150 : arm_stub_long_branch_v4t_thumb_arm
);
3152 /* Handle v4t short branches. */
3153 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
3154 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
3155 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
3156 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
3160 else if (r_type
== R_ARM_CALL
|| r_type
== R_ARM_JUMP24
|| r_type
== R_ARM_PLT32
)
3162 if (st_type
== STT_ARM_TFUNC
)
3167 && sym_sec
->owner
!= NULL
3168 && !INTERWORK_FLAG (sym_sec
->owner
))
3170 (*_bfd_error_handler
)
3171 (_("%B(%s): warning: interworking not enabled.\n"
3172 " first occurrence: %B: ARM call to Thumb"),
3173 sym_sec
->owner
, input_bfd
, name
);
3176 /* We have an extra 2-bytes reach because of
3177 the mode change (bit 24 (H) of BLX encoding). */
3178 if ((branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
3179 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
3180 || ((r_type
== R_ARM_CALL
) && !globals
->use_blx
)
3181 || (r_type
== R_ARM_JUMP24
)
3182 || (r_type
== R_ARM_PLT32
))
3185 stub_type
= (info
->shared
| globals
->pic_veneer
)
3187 ? ((globals
->use_blx
)
3188 /* V5T and above. */
3189 ? arm_stub_long_branch_any_thumb_pic
3191 : arm_stub_long_branch_v4t_arm_thumb_pic
)
3193 /* non-PIC stubs. */
3194 : ((globals
->use_blx
)
3195 /* V5T and above. */
3196 ? arm_stub_long_branch_any_any
3198 : arm_stub_long_branch_v4t_arm_thumb
);
3204 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
3205 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
3207 stub_type
= (info
->shared
| globals
->pic_veneer
)
3209 ? arm_stub_long_branch_any_arm_pic
3210 /* non-PIC stubs. */
3211 : arm_stub_long_branch_any_any
;
3219 /* Build a name for an entry in the stub hash table. */
3222 elf32_arm_stub_name (const asection
*input_section
,
3223 const asection
*sym_sec
,
3224 const struct elf32_arm_link_hash_entry
*hash
,
3225 const Elf_Internal_Rela
*rel
)
3232 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1;
3233 stub_name
= bfd_malloc (len
);
3234 if (stub_name
!= NULL
)
3235 sprintf (stub_name
, "%08x_%s+%x",
3236 input_section
->id
& 0xffffffff,
3237 hash
->root
.root
.root
.string
,
3238 (int) rel
->r_addend
& 0xffffffff);
3242 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3243 stub_name
= bfd_malloc (len
);
3244 if (stub_name
!= NULL
)
3245 sprintf (stub_name
, "%08x_%x:%x+%x",
3246 input_section
->id
& 0xffffffff,
3247 sym_sec
->id
& 0xffffffff,
3248 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
3249 (int) rel
->r_addend
& 0xffffffff);
3255 /* Look up an entry in the stub hash. Stub entries are cached because
3256 creating the stub name takes a bit of time. */
3258 static struct elf32_arm_stub_hash_entry
*
3259 elf32_arm_get_stub_entry (const asection
*input_section
,
3260 const asection
*sym_sec
,
3261 struct elf_link_hash_entry
*hash
,
3262 const Elf_Internal_Rela
*rel
,
3263 struct elf32_arm_link_hash_table
*htab
)
3265 struct elf32_arm_stub_hash_entry
*stub_entry
;
3266 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
3267 const asection
*id_sec
;
3269 if ((input_section
->flags
& SEC_CODE
) == 0)
3272 /* If this input section is part of a group of sections sharing one
3273 stub section, then use the id of the first section in the group.
3274 Stub names need to include a section id, as there may well be
3275 more than one stub used to reach say, printf, and we need to
3276 distinguish between them. */
3277 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3279 if (h
!= NULL
&& h
->stub_cache
!= NULL
3280 && h
->stub_cache
->h
== h
3281 && h
->stub_cache
->id_sec
== id_sec
)
3283 stub_entry
= h
->stub_cache
;
3289 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
);
3290 if (stub_name
== NULL
)
3293 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
3294 stub_name
, FALSE
, FALSE
);
3296 h
->stub_cache
= stub_entry
;
3304 /* Find or create a stub section. Returns a pointer to the stub section, and
3305 the section to which the stub section will be attached (in *LINK_SEC_P).
3306 LINK_SEC_P may be NULL. */
3309 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3310 struct elf32_arm_link_hash_table
*htab
)
3315 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3316 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3317 if (stub_sec
== NULL
)
3319 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3320 if (stub_sec
== NULL
)
3326 namelen
= strlen (link_sec
->name
);
3327 len
= namelen
+ sizeof (STUB_SUFFIX
);
3328 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
3332 memcpy (s_name
, link_sec
->name
, namelen
);
3333 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3334 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
3335 if (stub_sec
== NULL
)
3337 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3339 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3343 *link_sec_p
= link_sec
;
3348 /* Add a new stub entry to the stub hash. Not all fields of the new
3349 stub entry are initialised. */
3351 static struct elf32_arm_stub_hash_entry
*
3352 elf32_arm_add_stub (const char *stub_name
,
3354 struct elf32_arm_link_hash_table
*htab
)
3358 struct elf32_arm_stub_hash_entry
*stub_entry
;
3360 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
);
3361 if (stub_sec
== NULL
)
3364 /* Enter this entry into the linker stub hash table. */
3365 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3367 if (stub_entry
== NULL
)
3369 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3375 stub_entry
->stub_sec
= stub_sec
;
3376 stub_entry
->stub_offset
= 0;
3377 stub_entry
->id_sec
= link_sec
;
3382 /* Store an Arm insn into an output section not processed by
3383 elf32_arm_write_section. */
3386 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
3387 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3389 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3390 bfd_putl32 (val
, ptr
);
3392 bfd_putb32 (val
, ptr
);
3395 /* Store a 16-bit Thumb insn into an output section not processed by
3396 elf32_arm_write_section. */
3399 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
3400 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3402 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3403 bfd_putl16 (val
, ptr
);
3405 bfd_putb16 (val
, ptr
);
3408 static bfd_reloc_status_type elf32_arm_final_link_relocate
3409 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
3410 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
3411 const char *, int, struct elf_link_hash_entry
*, bfd_boolean
*, char **);
3414 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
3418 struct elf32_arm_stub_hash_entry
*stub_entry
;
3419 struct bfd_link_info
*info
;
3420 struct elf32_arm_link_hash_table
*htab
;
3428 const insn_sequence
*template;
3430 struct elf32_arm_link_hash_table
* globals
;
3431 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
3432 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
3435 /* Massage our args to the form they really have. */
3436 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3437 info
= (struct bfd_link_info
*) in_arg
;
3439 globals
= elf32_arm_hash_table (info
);
3441 htab
= elf32_arm_hash_table (info
);
3442 stub_sec
= stub_entry
->stub_sec
;
3444 /* Make a note of the offset within the stubs for this entry. */
3445 stub_entry
->stub_offset
= stub_sec
->size
;
3446 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
3448 stub_bfd
= stub_sec
->owner
;
3450 /* This is the address of the start of the stub. */
3451 stub_addr
= stub_sec
->output_section
->vma
+ stub_sec
->output_offset
3452 + stub_entry
->stub_offset
;
3454 /* This is the address of the stub destination. */
3455 sym_value
= (stub_entry
->target_value
3456 + stub_entry
->target_section
->output_offset
3457 + stub_entry
->target_section
->output_section
->vma
);
3459 template = stub_entry
->stub_template
;
3460 template_size
= stub_entry
->stub_template_size
;
3463 for (i
= 0; i
< template_size
; i
++)
3465 switch (template[i
].type
)
3469 bfd_vma data
= template[i
].data
;
3470 if (template[i
].reloc_addend
!= 0)
3472 /* We've borrowed the reloc_addend field to mean we should
3473 insert a condition code into this (Thumb-1 branch)
3474 instruction. See THUMB16_BCOND_INSN. */
3475 BFD_ASSERT ((data
& 0xff00) == 0xd000);
3476 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
3478 put_thumb_insn (globals
, stub_bfd
, data
, loc
+ size
);
3484 put_thumb_insn (globals
, stub_bfd
, (template[i
].data
>> 16) & 0xffff,
3486 put_thumb_insn (globals
, stub_bfd
, template[i
].data
& 0xffff,
3488 if (template[i
].r_type
!= R_ARM_NONE
)
3490 stub_reloc_idx
[nrelocs
] = i
;
3491 stub_reloc_offset
[nrelocs
++] = size
;
3497 put_arm_insn (globals
, stub_bfd
, template[i
].data
, loc
+ size
);
3498 /* Handle cases where the target is encoded within the
3500 if (template[i
].r_type
== R_ARM_JUMP24
)
3502 stub_reloc_idx
[nrelocs
] = i
;
3503 stub_reloc_offset
[nrelocs
++] = size
;
3509 bfd_put_32 (stub_bfd
, template[i
].data
, loc
+ size
);
3510 stub_reloc_idx
[nrelocs
] = i
;
3511 stub_reloc_offset
[nrelocs
++] = size
;
3521 stub_sec
->size
+= size
;
3523 /* Stub size has already been computed in arm_size_one_stub. Check
3525 BFD_ASSERT (size
== stub_entry
->stub_size
);
3527 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3528 if (stub_entry
->st_type
== STT_ARM_TFUNC
)
3531 /* Assume there is at least one and at most MAXRELOCS entries to relocate
3533 BFD_ASSERT (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
);
3535 for (i
= 0; i
< nrelocs
; i
++)
3536 if (template[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP24
3537 || template[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP19
3538 || template[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_CALL
3539 || template[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_XPC22
)
3541 Elf_Internal_Rela rel
;
3542 bfd_boolean unresolved_reloc
;
3543 char *error_message
;
3545 = (template[stub_reloc_idx
[i
]].r_type
!= R_ARM_THM_XPC22
)
3546 ? STT_ARM_TFUNC
: 0;
3547 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
;
3549 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
3550 rel
.r_info
= ELF32_R_INFO (0, template[stub_reloc_idx
[i
]].r_type
);
3551 rel
.r_addend
= template[stub_reloc_idx
[i
]].reloc_addend
;
3553 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
3554 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
3555 template should refer back to the instruction after the original
3557 points_to
= sym_value
;
3559 /* Note: _bfd_final_link_relocate doesn't handle these relocations
3560 properly. We should probably use this function unconditionally,
3561 rather than only for certain relocations listed in the enclosing
3562 conditional, for the sake of consistency. */
3563 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3564 (template[stub_reloc_idx
[i
]].r_type
),
3565 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
3566 points_to
, info
, stub_entry
->target_section
, "", sym_flags
,
3567 (struct elf_link_hash_entry
*) stub_entry
, &unresolved_reloc
,
3572 _bfd_final_link_relocate (elf32_arm_howto_from_type
3573 (template[stub_reloc_idx
[i
]].r_type
), stub_bfd
, stub_sec
,
3574 stub_sec
->contents
, stub_entry
->stub_offset
+ stub_reloc_offset
[i
],
3575 sym_value
+ stub_entry
->target_addend
,
3576 template[stub_reloc_idx
[i
]].reloc_addend
);
3583 /* Calculate the template, template size and instruction size for a stub.
3584 Return value is the instruction size. */
3587 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
3588 const insn_sequence
**stub_template
,
3589 int *stub_template_size
)
3591 const insn_sequence
*template = NULL
;
3592 int template_size
= 0, i
;
3595 template = stub_definitions
[stub_type
].template;
3596 template_size
= stub_definitions
[stub_type
].template_size
;
3599 for (i
= 0; i
< template_size
; i
++)
3601 switch (template[i
].type
)
3620 *stub_template
= template;
3622 if (stub_template_size
)
3623 *stub_template_size
= template_size
;
3628 /* As above, but don't actually build the stub. Just bump offset so
3629 we know stub section sizes. */
3632 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
3635 struct elf32_arm_stub_hash_entry
*stub_entry
;
3636 struct elf32_arm_link_hash_table
*htab
;
3637 const insn_sequence
*template;
3638 int template_size
, size
;
3640 /* Massage our args to the form they really have. */
3641 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3642 htab
= (struct elf32_arm_link_hash_table
*) in_arg
;
3644 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
3645 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
3647 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template,
3650 stub_entry
->stub_size
= size
;
3651 stub_entry
->stub_template
= template;
3652 stub_entry
->stub_template_size
= template_size
;
3654 size
= (size
+ 7) & ~7;
3655 stub_entry
->stub_sec
->size
+= size
;
3660 /* External entry points for sizing and building linker stubs. */
3662 /* Set up various things so that we can make a list of input sections
3663 for each output section included in the link. Returns -1 on error,
3664 0 when no stubs will be needed, and 1 on success. */
3667 elf32_arm_setup_section_lists (bfd
*output_bfd
,
3668 struct bfd_link_info
*info
)
3671 unsigned int bfd_count
;
3672 int top_id
, top_index
;
3674 asection
**input_list
, **list
;
3676 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3678 if (! is_elf_hash_table (htab
))
3681 /* Count the number of input BFDs and find the top input section id. */
3682 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3684 input_bfd
= input_bfd
->link_next
)
3687 for (section
= input_bfd
->sections
;
3689 section
= section
->next
)
3691 if (top_id
< section
->id
)
3692 top_id
= section
->id
;
3695 htab
->bfd_count
= bfd_count
;
3697 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3698 htab
->stub_group
= bfd_zmalloc (amt
);
3699 if (htab
->stub_group
== NULL
)
3702 /* We can't use output_bfd->section_count here to find the top output
3703 section index as some sections may have been removed, and
3704 _bfd_strip_section_from_output doesn't renumber the indices. */
3705 for (section
= output_bfd
->sections
, top_index
= 0;
3707 section
= section
->next
)
3709 if (top_index
< section
->index
)
3710 top_index
= section
->index
;
3713 htab
->top_index
= top_index
;
3714 amt
= sizeof (asection
*) * (top_index
+ 1);
3715 input_list
= bfd_malloc (amt
);
3716 htab
->input_list
= input_list
;
3717 if (input_list
== NULL
)
3720 /* For sections we aren't interested in, mark their entries with a
3721 value we can check later. */
3722 list
= input_list
+ top_index
;
3724 *list
= bfd_abs_section_ptr
;
3725 while (list
-- != input_list
);
3727 for (section
= output_bfd
->sections
;
3729 section
= section
->next
)
3731 if ((section
->flags
& SEC_CODE
) != 0)
3732 input_list
[section
->index
] = NULL
;
3738 /* The linker repeatedly calls this function for each input section,
3739 in the order that input sections are linked into output sections.
3740 Build lists of input sections to determine groupings between which
3741 we may insert linker stubs. */
3744 elf32_arm_next_input_section (struct bfd_link_info
*info
,
3747 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3749 if (isec
->output_section
->index
<= htab
->top_index
)
3751 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3753 if (*list
!= bfd_abs_section_ptr
)
3755 /* Steal the link_sec pointer for our list. */
3756 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3757 /* This happens to make the list in reverse order,
3758 which we reverse later. */
3759 PREV_SEC (isec
) = *list
;
3765 /* See whether we can group stub sections together. Grouping stub
3766 sections may result in fewer stubs. More importantly, we need to
3767 put all .init* and .fini* stubs at the end of the .init or
3768 .fini output sections respectively, because glibc splits the
3769 _init and _fini functions into multiple parts. Putting a stub in
3770 the middle of a function is not a good idea. */
3773 group_sections (struct elf32_arm_link_hash_table
*htab
,
3774 bfd_size_type stub_group_size
,
3775 bfd_boolean stubs_always_after_branch
)
3777 asection
**list
= htab
->input_list
;
3781 asection
*tail
= *list
;
3784 if (tail
== bfd_abs_section_ptr
)
3787 /* Reverse the list: we must avoid placing stubs at the
3788 beginning of the section because the beginning of the text
3789 section may be required for an interrupt vector in bare metal
3791 #define NEXT_SEC PREV_SEC
3793 while (tail
!= NULL
)
3795 /* Pop from tail. */
3796 asection
*item
= tail
;
3797 tail
= PREV_SEC (item
);
3800 NEXT_SEC (item
) = head
;
3804 while (head
!= NULL
)
3808 bfd_vma stub_group_start
= head
->output_offset
;
3809 bfd_vma end_of_next
;
3812 while (NEXT_SEC (curr
) != NULL
)
3814 next
= NEXT_SEC (curr
);
3815 end_of_next
= next
->output_offset
+ next
->size
;
3816 if (end_of_next
- stub_group_start
>= stub_group_size
)
3817 /* End of NEXT is too far from start, so stop. */
3819 /* Add NEXT to the group. */
3823 /* OK, the size from the start to the start of CURR is less
3824 than stub_group_size and thus can be handled by one stub
3825 section. (Or the head section is itself larger than
3826 stub_group_size, in which case we may be toast.)
3827 We should really be keeping track of the total size of
3828 stubs added here, as stubs contribute to the final output
3832 next
= NEXT_SEC (head
);
3833 /* Set up this stub group. */
3834 htab
->stub_group
[head
->id
].link_sec
= curr
;
3836 while (head
!= curr
&& (head
= next
) != NULL
);
3838 /* But wait, there's more! Input sections up to stub_group_size
3839 bytes after the stub section can be handled by it too. */
3840 if (!stubs_always_after_branch
)
3842 stub_group_start
= curr
->output_offset
+ curr
->size
;
3844 while (next
!= NULL
)
3846 end_of_next
= next
->output_offset
+ next
->size
;
3847 if (end_of_next
- stub_group_start
>= stub_group_size
)
3848 /* End of NEXT is too far from stubs, so stop. */
3850 /* Add NEXT to the stub group. */
3852 next
= NEXT_SEC (head
);
3853 htab
->stub_group
[head
->id
].link_sec
= curr
;
3859 while (list
++ != htab
->input_list
+ htab
->top_index
);
3861 free (htab
->input_list
);
3866 /* Comparison function for sorting/searching relocations relating to Cortex-A8
3870 a8_reloc_compare (const void *a
, const void *b
)
3872 const struct a8_erratum_reloc
*ra
= a
, *rb
= b
;
3874 if (ra
->from
< rb
->from
)
3876 else if (ra
->from
> rb
->from
)
3882 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
3883 const char *, char **);
3885 /* Helper function to scan code for sequences which might trigger the Cortex-A8
3886 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
3887 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Return 1 if an error occurs, 0
3891 cortex_a8_erratum_scan (bfd
*input_bfd
, struct bfd_link_info
*info
,
3892 struct a8_erratum_fix
**a8_fixes_p
,
3893 unsigned int *num_a8_fixes_p
,
3894 unsigned int *a8_fix_table_size_p
,
3895 struct a8_erratum_reloc
*a8_relocs
,
3896 unsigned int num_a8_relocs
)
3899 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3900 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
3901 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
3902 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
3904 for (section
= input_bfd
->sections
;
3906 section
= section
->next
)
3908 bfd_byte
*contents
= NULL
;
3909 struct _arm_elf_section_data
*sec_data
;
3913 if (elf_section_type (section
) != SHT_PROGBITS
3914 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3915 || (section
->flags
& SEC_EXCLUDE
) != 0
3916 || (section
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
3917 || (section
->output_section
== bfd_abs_section_ptr
))
3920 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
3922 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3923 contents
= elf_section_data (section
)->this_hdr
.contents
;
3924 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3927 sec_data
= elf32_arm_section_data (section
);
3929 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3931 unsigned int span_start
= sec_data
->map
[span
].vma
;
3932 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
3933 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
3935 char span_type
= sec_data
->map
[span
].type
;
3936 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
3938 if (span_type
!= 't')
3941 /* Span is entirely within a single 4KB region: skip scanning. */
3942 if (((base_vma
+ span_start
) & ~0xfff)
3943 == ((base_vma
+ span_end
) & ~0xfff))
3946 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
3948 * The opcode is BLX.W, BL.W, B.W, Bcc.W
3949 * The branch target is in the same 4KB region as the
3950 first half of the branch.
3951 * The instruction before the branch is a 32-bit
3952 length non-branch instruction.
3955 for (i
= span_start
; i
< span_end
;)
3957 unsigned int insn
= bfd_getl16 (&contents
[i
]);
3958 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
3959 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
3961 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
3966 /* Load the rest of the insn (in manual-friendly order). */
3967 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
3969 /* Encoding T4: B<c>.W. */
3970 is_b
= (insn
& 0xf800d000) == 0xf0009000;
3971 /* Encoding T1: BL<c>.W. */
3972 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
3973 /* Encoding T2: BLX<c>.W. */
3974 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
3975 /* Encoding T3: B<c>.W (not permitted in IT block). */
3976 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
3977 && (insn
& 0x07f00000) != 0x03800000;
3980 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
3982 if (((base_vma
+ i
) & 0xfff) == 0xffe && insn_32bit
3983 && is_32bit_branch
&& last_was_32bit
&& !last_was_branch
)
3986 bfd_boolean force_target_arm
= FALSE
;
3987 bfd_boolean force_target_thumb
= FALSE
;
3989 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3990 struct a8_erratum_reloc key
, *found
;
3992 key
.from
= base_vma
+ i
;
3993 found
= bsearch (&key
, a8_relocs
, num_a8_relocs
,
3994 sizeof (struct a8_erratum_reloc
),
3999 char *error_message
= NULL
;
4000 struct elf_link_hash_entry
*entry
;
4002 /* We don't care about the error returned from this
4003 function, only if there is glue or not. */
4004 entry
= find_thumb_glue (info
, found
->sym_name
,
4008 found
->non_a8_stub
= TRUE
;
4010 if (found
->r_type
== R_ARM_THM_CALL
4011 && found
->st_type
!= STT_ARM_TFUNC
)
4012 force_target_arm
= TRUE
;
4013 else if (found
->r_type
== R_ARM_THM_CALL
4014 && found
->st_type
== STT_ARM_TFUNC
)
4015 force_target_thumb
= TRUE
;
4018 /* Check if we have an offending branch instruction. */
4020 if (found
&& found
->non_a8_stub
)
4021 /* We've already made a stub for this instruction, e.g.
4022 it's a long branch or a Thumb->ARM stub. Assume that
4023 stub will suffice to work around the A8 erratum (see
4024 setting of always_after_branch above). */
4028 offset
= (insn
& 0x7ff) << 1;
4029 offset
|= (insn
& 0x3f0000) >> 4;
4030 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
4031 offset
|= (insn
& 0x800) ? 0x80000 : 0;
4032 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
4033 if (offset
& 0x100000)
4035 stub_type
= arm_stub_a8_veneer_b_cond
;
4037 else if (is_b
|| is_bl
|| is_blx
)
4039 int s
= (insn
& 0x4000000) != 0;
4040 int j1
= (insn
& 0x2000) != 0;
4041 int j2
= (insn
& 0x800) != 0;
4045 offset
= (insn
& 0x7ff) << 1;
4046 offset
|= (insn
& 0x3ff0000) >> 4;
4050 if (offset
& 0x1000000)
4051 offset
|= ~0xffffff;
4056 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
4057 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
4060 if (stub_type
!= arm_stub_none
)
4062 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
4064 /* The original instruction is a BL, but the target is
4065 an ARM instruction. If we were not making a stub,
4066 the BL would have been converted to a BLX. Use the
4067 BLX stub instead in that case. */
4068 if (htab
->use_blx
&& force_target_arm
4069 && stub_type
== arm_stub_a8_veneer_bl
)
4071 stub_type
= arm_stub_a8_veneer_blx
;
4075 /* Conversely, if the original instruction was
4076 BLX but the target is Thumb mode, use the BL
4078 else if (force_target_thumb
4079 && stub_type
== arm_stub_a8_veneer_blx
)
4081 stub_type
= arm_stub_a8_veneer_bl
;
4089 /* If we found a relocation, use the proper destination,
4090 not the offset in the (unrelocated) instruction.
4091 Note this is always done if we switched the stub type
4094 offset
= found
->destination
- pc_for_insn
;
4096 target
= pc_for_insn
+ offset
;
4098 /* The BLX stub is ARM-mode code. Adjust the offset to
4099 take the different PC value (+8 instead of +4) into
4101 if (stub_type
== arm_stub_a8_veneer_blx
)
4104 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
4108 if (num_a8_fixes
== a8_fix_table_size
)
4110 a8_fix_table_size
*= 2;
4111 a8_fixes
= bfd_realloc (a8_fixes
,
4112 sizeof (struct a8_erratum_fix
)
4113 * a8_fix_table_size
);
4116 stub_name
= bfd_malloc (8 + 1 + 8 + 1);
4117 if (stub_name
!= NULL
)
4118 sprintf (stub_name
, "%x:%x", section
->id
, i
);
4120 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
4121 a8_fixes
[num_a8_fixes
].section
= section
;
4122 a8_fixes
[num_a8_fixes
].offset
= i
;
4123 a8_fixes
[num_a8_fixes
].addend
= offset
;
4124 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
4125 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
4126 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
4133 i
+= insn_32bit
? 4 : 2;
4134 last_was_32bit
= insn_32bit
;
4135 last_was_branch
= is_32bit_branch
;
4139 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4143 *a8_fixes_p
= a8_fixes
;
4144 *num_a8_fixes_p
= num_a8_fixes
;
4145 *a8_fix_table_size_p
= a8_fix_table_size
;
4150 /* Determine and set the size of the stub section for a final link.
4152 The basic idea here is to examine all the relocations looking for
4153 PC-relative calls to a target that is unreachable with a "bl"
4157 elf32_arm_size_stubs (bfd
*output_bfd
,
4159 struct bfd_link_info
*info
,
4160 bfd_signed_vma group_size
,
4161 asection
* (*add_stub_section
) (const char *, asection
*),
4162 void (*layout_sections_again
) (void))
4164 bfd_size_type stub_group_size
;
4165 bfd_boolean stubs_always_after_branch
;
4166 bfd_boolean stub_changed
= 0;
4167 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4168 struct a8_erratum_fix
*a8_fixes
= NULL
;
4169 unsigned int num_a8_fixes
= 0, prev_num_a8_fixes
= 0, a8_fix_table_size
= 10;
4170 struct a8_erratum_reloc
*a8_relocs
= NULL
;
4171 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
4173 if (htab
->fix_cortex_a8
)
4175 a8_fixes
= bfd_zmalloc (sizeof (struct a8_erratum_fix
)
4176 * a8_fix_table_size
);
4177 a8_relocs
= bfd_zmalloc (sizeof (struct a8_erratum_reloc
)
4178 * a8_reloc_table_size
);
4181 /* Propagate mach to stub bfd, because it may not have been
4182 finalized when we created stub_bfd. */
4183 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4184 bfd_get_mach (output_bfd
));
4186 /* Stash our params away. */
4187 htab
->stub_bfd
= stub_bfd
;
4188 htab
->add_stub_section
= add_stub_section
;
4189 htab
->layout_sections_again
= layout_sections_again
;
4190 stubs_always_after_branch
= group_size
< 0;
4192 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4193 as the first half of a 32-bit branch straddling two 4K pages. This is a
4194 crude way of enforcing that. */
4195 if (htab
->fix_cortex_a8
)
4196 stubs_always_after_branch
= 1;
4199 stub_group_size
= -group_size
;
4201 stub_group_size
= group_size
;
4203 if (stub_group_size
== 1)
4205 /* Default values. */
4206 /* Thumb branch range is +-4MB has to be used as the default
4207 maximum size (a given section can contain both ARM and Thumb
4208 code, so the worst case has to be taken into account).
4210 This value is 24K less than that, which allows for 2025
4211 12-byte stubs. If we exceed that, then we will fail to link.
4212 The user will have to relink with an explicit group size
4214 stub_group_size
= 4170000;
4217 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
4222 unsigned int bfd_indx
;
4227 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4229 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4231 Elf_Internal_Shdr
*symtab_hdr
;
4233 Elf_Internal_Sym
*local_syms
= NULL
;
4237 /* We'll need the symbol table in a second. */
4238 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4239 if (symtab_hdr
->sh_info
== 0)
4242 /* Walk over each section attached to the input bfd. */
4243 for (section
= input_bfd
->sections
;
4245 section
= section
->next
)
4247 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4249 /* If there aren't any relocs, then there's nothing more
4251 if ((section
->flags
& SEC_RELOC
) == 0
4252 || section
->reloc_count
== 0
4253 || (section
->flags
& SEC_CODE
) == 0)
4256 /* If this section is a link-once section that will be
4257 discarded, then don't create any stubs. */
4258 if (section
->output_section
== NULL
4259 || section
->output_section
->owner
!= output_bfd
)
4262 /* Get the relocs. */
4264 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
4265 NULL
, info
->keep_memory
);
4266 if (internal_relocs
== NULL
)
4267 goto error_ret_free_local
;
4269 /* Now examine each relocation. */
4270 irela
= internal_relocs
;
4271 irelaend
= irela
+ section
->reloc_count
;
4272 for (; irela
< irelaend
; irela
++)
4274 unsigned int r_type
, r_indx
;
4275 enum elf32_arm_stub_type stub_type
;
4276 struct elf32_arm_stub_hash_entry
*stub_entry
;
4279 bfd_vma destination
;
4280 struct elf32_arm_link_hash_entry
*hash
;
4281 const char *sym_name
;
4283 const asection
*id_sec
;
4284 unsigned char st_type
;
4285 bfd_boolean created_stub
= FALSE
;
4287 r_type
= ELF32_R_TYPE (irela
->r_info
);
4288 r_indx
= ELF32_R_SYM (irela
->r_info
);
4290 if (r_type
>= (unsigned int) R_ARM_max
)
4292 bfd_set_error (bfd_error_bad_value
);
4293 error_ret_free_internal
:
4294 if (elf_section_data (section
)->relocs
== NULL
)
4295 free (internal_relocs
);
4296 goto error_ret_free_local
;
4299 /* Only look for stubs on branch instructions. */
4300 if ((r_type
!= (unsigned int) R_ARM_CALL
)
4301 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
4302 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
4303 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
4304 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
4305 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
4306 && (r_type
!= (unsigned int) R_ARM_PLT32
))
4309 /* Now determine the call target, its name, value,
4316 if (r_indx
< symtab_hdr
->sh_info
)
4318 /* It's a local symbol. */
4319 Elf_Internal_Sym
*sym
;
4320 Elf_Internal_Shdr
*hdr
;
4322 if (local_syms
== NULL
)
4325 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4326 if (local_syms
== NULL
)
4328 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4329 symtab_hdr
->sh_info
, 0,
4331 if (local_syms
== NULL
)
4332 goto error_ret_free_internal
;
4335 sym
= local_syms
+ r_indx
;
4336 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4337 sym_sec
= hdr
->bfd_section
;
4338 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4339 sym_value
= sym
->st_value
;
4340 destination
= (sym_value
+ irela
->r_addend
4341 + sym_sec
->output_offset
4342 + sym_sec
->output_section
->vma
);
4343 st_type
= ELF_ST_TYPE (sym
->st_info
);
4345 = bfd_elf_string_from_elf_section (input_bfd
,
4346 symtab_hdr
->sh_link
,
4351 /* It's an external symbol. */
4354 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4355 hash
= ((struct elf32_arm_link_hash_entry
*)
4356 elf_sym_hashes (input_bfd
)[e_indx
]);
4358 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4359 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4360 hash
= ((struct elf32_arm_link_hash_entry
*)
4361 hash
->root
.root
.u
.i
.link
);
4363 if (hash
->root
.root
.type
== bfd_link_hash_defined
4364 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4366 sym_sec
= hash
->root
.root
.u
.def
.section
;
4367 sym_value
= hash
->root
.root
.u
.def
.value
;
4368 if (sym_sec
->output_section
!= NULL
)
4369 destination
= (sym_value
+ irela
->r_addend
4370 + sym_sec
->output_offset
4371 + sym_sec
->output_section
->vma
);
4373 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
4374 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
4376 /* For a shared library, use the PLT stub as
4377 target address to decide whether a long
4378 branch stub is needed.
4379 For absolute code, they cannot be handled. */
4380 struct elf32_arm_link_hash_table
*globals
=
4381 elf32_arm_hash_table (info
);
4383 if (globals
->splt
!= NULL
&& hash
!= NULL
4384 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4386 sym_sec
= globals
->splt
;
4387 sym_value
= hash
->root
.plt
.offset
;
4388 if (sym_sec
->output_section
!= NULL
)
4389 destination
= (sym_value
4390 + sym_sec
->output_offset
4391 + sym_sec
->output_section
->vma
);
4398 bfd_set_error (bfd_error_bad_value
);
4399 goto error_ret_free_internal
;
4401 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4402 sym_name
= hash
->root
.root
.root
.string
;
4407 /* Determine what (if any) linker stub is needed. */
4408 stub_type
= arm_type_of_stub (info
, section
, irela
,
4410 destination
, sym_sec
,
4411 input_bfd
, sym_name
);
4412 if (stub_type
== arm_stub_none
)
4415 /* Support for grouping stub sections. */
4416 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4418 /* Get the name of this stub. */
4419 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
,
4422 goto error_ret_free_internal
;
4424 /* We've either created a stub for this reloc already,
4425 or we are about to. */
4426 created_stub
= TRUE
;
4428 stub_entry
= arm_stub_hash_lookup
4429 (&htab
->stub_hash_table
, stub_name
,
4431 if (stub_entry
!= NULL
)
4433 /* The proper stub has already been created. */
4438 stub_entry
= elf32_arm_add_stub (stub_name
, section
,
4440 if (stub_entry
== NULL
)
4443 goto error_ret_free_internal
;
4446 stub_entry
->target_value
= sym_value
;
4447 stub_entry
->target_section
= sym_sec
;
4448 stub_entry
->stub_type
= stub_type
;
4449 stub_entry
->h
= hash
;
4450 stub_entry
->st_type
= st_type
;
4452 if (sym_name
== NULL
)
4453 sym_name
= "unnamed";
4454 stub_entry
->output_name
4455 = bfd_alloc (htab
->stub_bfd
,
4456 sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
4457 + strlen (sym_name
));
4458 if (stub_entry
->output_name
== NULL
)
4461 goto error_ret_free_internal
;
4464 /* For historical reasons, use the existing names for
4465 ARM-to-Thumb and Thumb-to-ARM stubs. */
4466 if ( ((r_type
== (unsigned int) R_ARM_THM_CALL
)
4467 || (r_type
== (unsigned int) R_ARM_THM_JUMP24
))
4468 && st_type
!= STT_ARM_TFUNC
)
4469 sprintf (stub_entry
->output_name
,
4470 THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
4471 else if ( ((r_type
== (unsigned int) R_ARM_CALL
)
4472 || (r_type
== (unsigned int) R_ARM_JUMP24
))
4473 && st_type
== STT_ARM_TFUNC
)
4474 sprintf (stub_entry
->output_name
,
4475 ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
4477 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
,
4480 stub_changed
= TRUE
;
4484 /* Look for relocations which might trigger Cortex-A8
4486 if (htab
->fix_cortex_a8
4487 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
4488 || r_type
== (unsigned int) R_ARM_THM_JUMP19
4489 || r_type
== (unsigned int) R_ARM_THM_CALL
4490 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
4492 bfd_vma from
= section
->output_section
->vma
4493 + section
->output_offset
4496 if ((from
& 0xfff) == 0xffe)
4498 /* Found a candidate. Note we haven't checked the
4499 destination is within 4K here: if we do so (and
4500 don't create an entry in a8_relocs) we can't tell
4501 that a branch should have been relocated when
4503 if (num_a8_relocs
== a8_reloc_table_size
)
4505 a8_reloc_table_size
*= 2;
4506 a8_relocs
= bfd_realloc (a8_relocs
,
4507 sizeof (struct a8_erratum_reloc
)
4508 * a8_reloc_table_size
);
4511 a8_relocs
[num_a8_relocs
].from
= from
;
4512 a8_relocs
[num_a8_relocs
].destination
= destination
;
4513 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
4514 a8_relocs
[num_a8_relocs
].st_type
= st_type
;
4515 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
4516 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
4523 /* We're done with the internal relocs, free them. */
4524 if (elf_section_data (section
)->relocs
== NULL
)
4525 free (internal_relocs
);
4528 if (htab
->fix_cortex_a8
)
4530 /* Sort relocs which might apply to Cortex-A8 erratum. */
4531 qsort (a8_relocs
, num_a8_relocs
, sizeof (struct a8_erratum_reloc
),
4534 /* Scan for branches which might trigger Cortex-A8 erratum. */
4535 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
4536 &num_a8_fixes
, &a8_fix_table_size
,
4537 a8_relocs
, num_a8_relocs
) != 0)
4538 goto error_ret_free_local
;
4542 if (htab
->fix_cortex_a8
&& num_a8_fixes
!= prev_num_a8_fixes
)
4543 stub_changed
= TRUE
;
4548 /* OK, we've added some stubs. Find out the new size of the
4550 for (stub_sec
= htab
->stub_bfd
->sections
;
4552 stub_sec
= stub_sec
->next
)
4554 /* Ignore non-stub sections. */
4555 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4561 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
4563 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
4564 if (htab
->fix_cortex_a8
)
4565 for (i
= 0; i
< num_a8_fixes
; i
++)
4567 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
4568 a8_fixes
[i
].section
, htab
);
4570 if (stub_sec
== NULL
)
4571 goto error_ret_free_local
;
4574 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
4579 /* Ask the linker to do its stuff. */
4580 (*htab
->layout_sections_again
) ();
4581 stub_changed
= FALSE
;
4582 prev_num_a8_fixes
= num_a8_fixes
;
4585 /* Add stubs for Cortex-A8 erratum fixes now. */
4586 if (htab
->fix_cortex_a8
)
4588 for (i
= 0; i
< num_a8_fixes
; i
++)
4590 struct elf32_arm_stub_hash_entry
*stub_entry
;
4591 char *stub_name
= a8_fixes
[i
].stub_name
;
4592 asection
*section
= a8_fixes
[i
].section
;
4593 unsigned int section_id
= a8_fixes
[i
].section
->id
;
4594 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
4595 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
4596 const insn_sequence
*template;
4597 int template_size
, size
= 0;
4599 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
4601 if (stub_entry
== NULL
)
4603 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
4609 stub_entry
->stub_sec
= stub_sec
;
4610 stub_entry
->stub_offset
= 0;
4611 stub_entry
->id_sec
= link_sec
;
4612 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
4613 stub_entry
->target_section
= a8_fixes
[i
].section
;
4614 stub_entry
->target_value
= a8_fixes
[i
].offset
;
4615 stub_entry
->target_addend
= a8_fixes
[i
].addend
;
4616 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
4617 stub_entry
->st_type
= STT_ARM_TFUNC
;
4619 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
, &template,
4622 stub_entry
->stub_size
= size
;
4623 stub_entry
->stub_template
= template;
4624 stub_entry
->stub_template_size
= template_size
;
4627 /* Stash the Cortex-A8 erratum fix array for use later in
4628 elf32_arm_write_section(). */
4629 htab
->a8_erratum_fixes
= a8_fixes
;
4630 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
4634 htab
->a8_erratum_fixes
= NULL
;
4635 htab
->num_a8_erratum_fixes
= 0;
4639 error_ret_free_local
:
4643 /* Build all the stubs associated with the current output file. The
4644 stubs are kept in a hash table attached to the main linker hash
4645 table. We also set up the .plt entries for statically linked PIC
4646 functions here. This function is called via arm_elf_finish in the
4650 elf32_arm_build_stubs (struct bfd_link_info
*info
)
4653 struct bfd_hash_table
*table
;
4654 struct elf32_arm_link_hash_table
*htab
;
4656 htab
= elf32_arm_hash_table (info
);
4658 for (stub_sec
= htab
->stub_bfd
->sections
;
4660 stub_sec
= stub_sec
->next
)
4664 /* Ignore non-stub sections. */
4665 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4668 /* Allocate memory to hold the linker stubs. */
4669 size
= stub_sec
->size
;
4670 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4671 if (stub_sec
->contents
== NULL
&& size
!= 0)
4676 /* Build the stubs as directed by the stub hash table. */
4677 table
= &htab
->stub_hash_table
;
4678 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
4683 /* Locate the Thumb encoded calling stub for NAME. */
4685 static struct elf_link_hash_entry
*
4686 find_thumb_glue (struct bfd_link_info
*link_info
,
4688 char **error_message
)
4691 struct elf_link_hash_entry
*hash
;
4692 struct elf32_arm_link_hash_table
*hash_table
;
4694 /* We need a pointer to the armelf specific hash table. */
4695 hash_table
= elf32_arm_hash_table (link_info
);
4697 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
)
4698 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
4700 BFD_ASSERT (tmp_name
);
4702 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
4704 hash
= elf_link_hash_lookup
4705 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4708 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
4709 tmp_name
, name
) == -1)
4710 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
4717 /* Locate the ARM encoded calling stub for NAME. */
4719 static struct elf_link_hash_entry
*
4720 find_arm_glue (struct bfd_link_info
*link_info
,
4722 char **error_message
)
4725 struct elf_link_hash_entry
*myh
;
4726 struct elf32_arm_link_hash_table
*hash_table
;
4728 /* We need a pointer to the elfarm specific hash table. */
4729 hash_table
= elf32_arm_hash_table (link_info
);
4731 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
)
4732 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
4734 BFD_ASSERT (tmp_name
);
4736 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
4738 myh
= elf_link_hash_lookup
4739 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4742 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
4743 tmp_name
, name
) == -1)
4744 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
4751 /* ARM->Thumb glue (static images):
4755 ldr r12, __func_addr
4758 .word func @ behave as if you saw a ARM_32 reloc.
4765 .word func @ behave as if you saw a ARM_32 reloc.
4767 (relocatable images)
4770 ldr r12, __func_offset
4776 #define ARM2THUMB_STATIC_GLUE_SIZE 12
4777 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
4778 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
4779 static const insn32 a2t3_func_addr_insn
= 0x00000001;
4781 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
4782 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
4783 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
4785 #define ARM2THUMB_PIC_GLUE_SIZE 16
4786 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
4787 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
4788 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
4790 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
4794 __func_from_thumb: __func_from_thumb:
4796 nop ldr r6, __func_addr
4806 #define THUMB2ARM_GLUE_SIZE 8
4807 static const insn16 t2a1_bx_pc_insn
= 0x4778;
4808 static const insn16 t2a2_noop_insn
= 0x46c0;
4809 static const insn32 t2a3_b_insn
= 0xea000000;
4811 #define VFP11_ERRATUM_VENEER_SIZE 8
4813 #define ARM_BX_VENEER_SIZE 12
4814 static const insn32 armbx1_tst_insn
= 0xe3100001;
4815 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
4816 static const insn32 armbx3_bx_insn
= 0xe12fff10;
4818 #ifndef ELFARM_NABI_C_INCLUDED
4820 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
4823 bfd_byte
* contents
;
4827 /* Do not include empty glue sections in the output. */
4830 s
= bfd_get_section_by_name (abfd
, name
);
4832 s
->flags
|= SEC_EXCLUDE
;
4837 BFD_ASSERT (abfd
!= NULL
);
4839 s
= bfd_get_section_by_name (abfd
, name
);
4840 BFD_ASSERT (s
!= NULL
);
4842 contents
= bfd_alloc (abfd
, size
);
4844 BFD_ASSERT (s
->size
== size
);
4845 s
->contents
= contents
;
4849 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
4851 struct elf32_arm_link_hash_table
* globals
;
4853 globals
= elf32_arm_hash_table (info
);
4854 BFD_ASSERT (globals
!= NULL
);
4856 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
4857 globals
->arm_glue_size
,
4858 ARM2THUMB_GLUE_SECTION_NAME
);
4860 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
4861 globals
->thumb_glue_size
,
4862 THUMB2ARM_GLUE_SECTION_NAME
);
4864 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
4865 globals
->vfp11_erratum_glue_size
,
4866 VFP11_ERRATUM_VENEER_SECTION_NAME
);
4868 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
4869 globals
->bx_glue_size
,
4870 ARM_BX_GLUE_SECTION_NAME
);
4875 /* Allocate space and symbols for calling a Thumb function from Arm mode.
4876 returns the symbol identifying the stub. */
4878 static struct elf_link_hash_entry
*
4879 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
4880 struct elf_link_hash_entry
* h
)
4882 const char * name
= h
->root
.root
.string
;
4885 struct elf_link_hash_entry
* myh
;
4886 struct bfd_link_hash_entry
* bh
;
4887 struct elf32_arm_link_hash_table
* globals
;
4891 globals
= elf32_arm_hash_table (link_info
);
4893 BFD_ASSERT (globals
!= NULL
);
4894 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
4896 s
= bfd_get_section_by_name
4897 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
4899 BFD_ASSERT (s
!= NULL
);
4901 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
) + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
4903 BFD_ASSERT (tmp_name
);
4905 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
4907 myh
= elf_link_hash_lookup
4908 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4912 /* We've already seen this guy. */
4917 /* The only trick here is using hash_table->arm_glue_size as the value.
4918 Even though the section isn't allocated yet, this is where we will be
4919 putting it. The +1 on the value marks that the stub has not been
4920 output yet - not that it is a Thumb function. */
4922 val
= globals
->arm_glue_size
+ 1;
4923 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
4924 tmp_name
, BSF_GLOBAL
, s
, val
,
4925 NULL
, TRUE
, FALSE
, &bh
);
4927 myh
= (struct elf_link_hash_entry
*) bh
;
4928 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
4929 myh
->forced_local
= 1;
4933 if (link_info
->shared
|| globals
->root
.is_relocatable_executable
4934 || globals
->pic_veneer
)
4935 size
= ARM2THUMB_PIC_GLUE_SIZE
;
4936 else if (globals
->use_blx
)
4937 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
4939 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
4942 globals
->arm_glue_size
+= size
;
4947 /* Allocate space for ARMv4 BX veneers. */
4950 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
4953 struct elf32_arm_link_hash_table
*globals
;
4955 struct elf_link_hash_entry
*myh
;
4956 struct bfd_link_hash_entry
*bh
;
4959 /* BX PC does not need a veneer. */
4963 globals
= elf32_arm_hash_table (link_info
);
4965 BFD_ASSERT (globals
!= NULL
);
4966 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
4968 /* Check if this veneer has already been allocated. */
4969 if (globals
->bx_glue_offset
[reg
])
4972 s
= bfd_get_section_by_name
4973 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
4975 BFD_ASSERT (s
!= NULL
);
4977 /* Add symbol for veneer. */
4978 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
4980 BFD_ASSERT (tmp_name
);
4982 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
4984 myh
= elf_link_hash_lookup
4985 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
4987 BFD_ASSERT (myh
== NULL
);
4990 val
= globals
->bx_glue_size
;
4991 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
4992 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
4993 NULL
, TRUE
, FALSE
, &bh
);
4995 myh
= (struct elf_link_hash_entry
*) bh
;
4996 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
4997 myh
->forced_local
= 1;
4999 s
->size
+= ARM_BX_VENEER_SIZE
;
5000 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
5001 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
5005 /* Add an entry to the code/data map for section SEC. */
5008 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
5010 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
5011 unsigned int newidx
;
5013 if (sec_data
->map
== NULL
)
5015 sec_data
->map
= bfd_malloc (sizeof (elf32_arm_section_map
));
5016 sec_data
->mapcount
= 0;
5017 sec_data
->mapsize
= 1;
5020 newidx
= sec_data
->mapcount
++;
5022 if (sec_data
->mapcount
> sec_data
->mapsize
)
5024 sec_data
->mapsize
*= 2;
5025 sec_data
->map
= bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
5026 * sizeof (elf32_arm_section_map
));
5031 sec_data
->map
[newidx
].vma
= vma
;
5032 sec_data
->map
[newidx
].type
= type
;
5037 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5038 veneers are handled for now. */
5041 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
5042 elf32_vfp11_erratum_list
*branch
,
5044 asection
*branch_sec
,
5045 unsigned int offset
)
5048 struct elf32_arm_link_hash_table
*hash_table
;
5050 struct elf_link_hash_entry
*myh
;
5051 struct bfd_link_hash_entry
*bh
;
5053 struct _arm_elf_section_data
*sec_data
;
5055 elf32_vfp11_erratum_list
*newerr
;
5057 hash_table
= elf32_arm_hash_table (link_info
);
5059 BFD_ASSERT (hash_table
!= NULL
);
5060 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
5062 s
= bfd_get_section_by_name
5063 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
5065 sec_data
= elf32_arm_section_data (s
);
5067 BFD_ASSERT (s
!= NULL
);
5069 tmp_name
= bfd_malloc ((bfd_size_type
) strlen
5070 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
5072 BFD_ASSERT (tmp_name
);
5074 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
5075 hash_table
->num_vfp11_fixes
);
5077 myh
= elf_link_hash_lookup
5078 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5080 BFD_ASSERT (myh
== NULL
);
5083 val
= hash_table
->vfp11_erratum_glue_size
;
5084 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
5085 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5086 NULL
, TRUE
, FALSE
, &bh
);
5088 myh
= (struct elf_link_hash_entry
*) bh
;
5089 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5090 myh
->forced_local
= 1;
5092 /* Link veneer back to calling location. */
5093 errcount
= ++(sec_data
->erratumcount
);
5094 newerr
= bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5096 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
5098 newerr
->u
.v
.branch
= branch
;
5099 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
5100 branch
->u
.b
.veneer
= newerr
;
5102 newerr
->next
= sec_data
->erratumlist
;
5103 sec_data
->erratumlist
= newerr
;
5105 /* A symbol for the return from the veneer. */
5106 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
5107 hash_table
->num_vfp11_fixes
);
5109 myh
= elf_link_hash_lookup
5110 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5117 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
5118 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
5120 myh
= (struct elf_link_hash_entry
*) bh
;
5121 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5122 myh
->forced_local
= 1;
5126 /* Generate a mapping symbol for the veneer section, and explicitly add an
5127 entry for that symbol to the code/data map for the section. */
5128 if (hash_table
->vfp11_erratum_glue_size
== 0)
5131 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5132 ever requires this erratum fix. */
5133 _bfd_generic_link_add_one_symbol (link_info
,
5134 hash_table
->bfd_of_glue_owner
, "$a",
5135 BSF_LOCAL
, s
, 0, NULL
,
5138 myh
= (struct elf_link_hash_entry
*) bh
;
5139 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
5140 myh
->forced_local
= 1;
5142 /* The elf32_arm_init_maps function only cares about symbols from input
5143 BFDs. We must make a note of this generated mapping symbol
5144 ourselves so that code byteswapping works properly in
5145 elf32_arm_write_section. */
5146 elf32_arm_section_map_add (s
, 'a', 0);
5149 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
5150 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
5151 hash_table
->num_vfp11_fixes
++;
5153 /* The offset of the veneer. */
5157 #define ARM_GLUE_SECTION_FLAGS \
5158 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
5159 | SEC_READONLY | SEC_LINKER_CREATED)
5161 /* Create a fake section for use by the ARM backend of the linker. */
5164 arm_make_glue_section (bfd
* abfd
, const char * name
)
5168 sec
= bfd_get_section_by_name (abfd
, name
);
5173 sec
= bfd_make_section_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
5176 || !bfd_set_section_alignment (abfd
, sec
, 2))
5179 /* Set the gc mark to prevent the section from being removed by garbage
5180 collection, despite the fact that no relocs refer to this section. */
5186 /* Add the glue sections to ABFD. This function is called from the
5187 linker scripts in ld/emultempl/{armelf}.em. */
5190 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
5191 struct bfd_link_info
*info
)
5193 /* If we are only performing a partial
5194 link do not bother adding the glue. */
5195 if (info
->relocatable
)
5198 return arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
5199 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
5200 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
5201 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
5204 /* Select a BFD to be used to hold the sections used by the glue code.
5205 This function is called from the linker scripts in ld/emultempl/
5209 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
5211 struct elf32_arm_link_hash_table
*globals
;
5213 /* If we are only performing a partial link
5214 do not bother getting a bfd to hold the glue. */
5215 if (info
->relocatable
)
5218 /* Make sure we don't attach the glue sections to a dynamic object. */
5219 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
5221 globals
= elf32_arm_hash_table (info
);
5223 BFD_ASSERT (globals
!= NULL
);
5225 if (globals
->bfd_of_glue_owner
!= NULL
)
5228 /* Save the bfd for later use. */
5229 globals
->bfd_of_glue_owner
= abfd
;
5235 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
5237 if (bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
5239 globals
->use_blx
= 1;
5243 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
5244 struct bfd_link_info
*link_info
)
5246 Elf_Internal_Shdr
*symtab_hdr
;
5247 Elf_Internal_Rela
*internal_relocs
= NULL
;
5248 Elf_Internal_Rela
*irel
, *irelend
;
5249 bfd_byte
*contents
= NULL
;
5252 struct elf32_arm_link_hash_table
*globals
;
5254 /* If we are only performing a partial link do not bother
5255 to construct any glue. */
5256 if (link_info
->relocatable
)
5259 /* Here we have a bfd that is to be included on the link. We have a
5260 hook to do reloc rummaging, before section sizes are nailed down. */
5261 globals
= elf32_arm_hash_table (link_info
);
5263 BFD_ASSERT (globals
!= NULL
);
5265 check_use_blx (globals
);
5267 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
5269 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
5274 /* PR 5398: If we have not decided to include any loadable sections in
5275 the output then we will not have a glue owner bfd. This is OK, it
5276 just means that there is nothing else for us to do here. */
5277 if (globals
->bfd_of_glue_owner
== NULL
)
5280 /* Rummage around all the relocs and map the glue vectors. */
5281 sec
= abfd
->sections
;
5286 for (; sec
!= NULL
; sec
= sec
->next
)
5288 if (sec
->reloc_count
== 0)
5291 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
5294 symtab_hdr
= & elf_symtab_hdr (abfd
);
5296 /* Load the relocs. */
5298 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
5300 if (internal_relocs
== NULL
)
5303 irelend
= internal_relocs
+ sec
->reloc_count
;
5304 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
5307 unsigned long r_index
;
5309 struct elf_link_hash_entry
*h
;
5311 r_type
= ELF32_R_TYPE (irel
->r_info
);
5312 r_index
= ELF32_R_SYM (irel
->r_info
);
5314 /* These are the only relocation types we care about. */
5315 if ( r_type
!= R_ARM_PC24
5316 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
5319 /* Get the section contents if we haven't done so already. */
5320 if (contents
== NULL
)
5322 /* Get cached copy if it exists. */
5323 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
5324 contents
= elf_section_data (sec
)->this_hdr
.contents
;
5327 /* Go get them off disk. */
5328 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
5333 if (r_type
== R_ARM_V4BX
)
5337 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
5338 record_arm_bx_glue (link_info
, reg
);
5342 /* If the relocation is not against a symbol it cannot concern us. */
5345 /* We don't care about local symbols. */
5346 if (r_index
< symtab_hdr
->sh_info
)
5349 /* This is an external symbol. */
5350 r_index
-= symtab_hdr
->sh_info
;
5351 h
= (struct elf_link_hash_entry
*)
5352 elf_sym_hashes (abfd
)[r_index
];
5354 /* If the relocation is against a static symbol it must be within
5355 the current section and so cannot be a cross ARM/Thumb relocation. */
5359 /* If the call will go through a PLT entry then we do not need
5361 if (globals
->splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
5367 /* This one is a call from arm code. We need to look up
5368 the target of the call. If it is a thumb target, we
5370 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
5371 record_arm_to_thumb_glue (link_info
, h
);
5379 if (contents
!= NULL
5380 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5384 if (internal_relocs
!= NULL
5385 && elf_section_data (sec
)->relocs
!= internal_relocs
)
5386 free (internal_relocs
);
5387 internal_relocs
= NULL
;
5393 if (contents
!= NULL
5394 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5396 if (internal_relocs
!= NULL
5397 && elf_section_data (sec
)->relocs
!= internal_relocs
)
5398 free (internal_relocs
);
5405 /* Initialise maps of ARM/Thumb/data for input BFDs. */
5408 bfd_elf32_arm_init_maps (bfd
*abfd
)
5410 Elf_Internal_Sym
*isymbuf
;
5411 Elf_Internal_Shdr
*hdr
;
5412 unsigned int i
, localsyms
;
5414 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
5415 if (! is_arm_elf (abfd
))
5418 if ((abfd
->flags
& DYNAMIC
) != 0)
5421 hdr
= & elf_symtab_hdr (abfd
);
5422 localsyms
= hdr
->sh_info
;
5424 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
5425 should contain the number of local symbols, which should come before any
5426 global symbols. Mapping symbols are always local. */
5427 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
5430 /* No internal symbols read? Skip this BFD. */
5431 if (isymbuf
== NULL
)
5434 for (i
= 0; i
< localsyms
; i
++)
5436 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
5437 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5441 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
5443 name
= bfd_elf_string_from_elf_section (abfd
,
5444 hdr
->sh_link
, isym
->st_name
);
5446 if (bfd_is_arm_special_symbol_name (name
,
5447 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
5448 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
5454 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
5455 say what they wanted. */
5458 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
5460 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5461 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
5463 if (globals
->fix_cortex_a8
== -1)
5465 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
5466 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
5467 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
5468 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
5469 globals
->fix_cortex_a8
= 1;
5471 globals
->fix_cortex_a8
= 0;
5477 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
5479 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5480 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
5482 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
5483 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
5485 switch (globals
->vfp11_fix
)
5487 case BFD_ARM_VFP11_FIX_DEFAULT
:
5488 case BFD_ARM_VFP11_FIX_NONE
:
5489 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
5493 /* Give a warning, but do as the user requests anyway. */
5494 (*_bfd_error_handler
) (_("%B: warning: selected VFP11 erratum "
5495 "workaround is not necessary for target architecture"), obfd
);
5498 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
5499 /* For earlier architectures, we might need the workaround, but do not
5500 enable it by default. If users is running with broken hardware, they
5501 must enable the erratum fix explicitly. */
5502 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
5506 enum bfd_arm_vfp11_pipe
5514 /* Return a VFP register number. This is encoded as RX:X for single-precision
5515 registers, or X:RX for double-precision registers, where RX is the group of
5516 four bits in the instruction encoding and X is the single extension bit.
5517 RX and X fields are specified using their lowest (starting) bit. The return
5520 0...31: single-precision registers s0...s31
5521 32...63: double-precision registers d0...d31.
5523 Although X should be zero for VFP11 (encoding d0...d15 only), we might
5524 encounter VFP3 instructions, so we allow the full range for DP registers. */
5527 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
5531 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
5533 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
5536 /* Set bits in *WMASK according to a register number REG as encoded by
5537 bfd_arm_vfp11_regno(). Ignore d16-d31. */
5540 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
5545 *wmask
|= 3 << ((reg
- 32) * 2);
5548 /* Return TRUE if WMASK overwrites anything in REGS. */
5551 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
5555 for (i
= 0; i
< numregs
; i
++)
5557 unsigned int reg
= regs
[i
];
5559 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
5567 if ((wmask
& (3 << (reg
* 2))) != 0)
5574 /* In this function, we're interested in two things: finding input registers
5575 for VFP data-processing instructions, and finding the set of registers which
5576 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
5577 hold the written set, so FLDM etc. are easy to deal with (we're only
5578 interested in 32 SP registers or 16 dp registers, due to the VFP version
5579 implemented by the chip in question). DP registers are marked by setting
5580 both SP registers in the write mask). */
5582 static enum bfd_arm_vfp11_pipe
5583 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
5586 enum bfd_arm_vfp11_pipe pipe
= VFP11_BAD
;
5587 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
5589 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
5592 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
5593 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
5595 pqrs
= ((insn
& 0x00800000) >> 20)
5596 | ((insn
& 0x00300000) >> 19)
5597 | ((insn
& 0x00000040) >> 6);
5601 case 0: /* fmac[sd]. */
5602 case 1: /* fnmac[sd]. */
5603 case 2: /* fmsc[sd]. */
5604 case 3: /* fnmsc[sd]. */
5606 bfd_arm_vfp11_write_mask (destmask
, fd
);
5608 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
5613 case 4: /* fmul[sd]. */
5614 case 5: /* fnmul[sd]. */
5615 case 6: /* fadd[sd]. */
5616 case 7: /* fsub[sd]. */
5620 case 8: /* fdiv[sd]. */
5623 bfd_arm_vfp11_write_mask (destmask
, fd
);
5624 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
5629 case 15: /* extended opcode. */
5631 unsigned int extn
= ((insn
>> 15) & 0x1e)
5632 | ((insn
>> 7) & 1);
5636 case 0: /* fcpy[sd]. */
5637 case 1: /* fabs[sd]. */
5638 case 2: /* fneg[sd]. */
5639 case 8: /* fcmp[sd]. */
5640 case 9: /* fcmpe[sd]. */
5641 case 10: /* fcmpz[sd]. */
5642 case 11: /* fcmpez[sd]. */
5643 case 16: /* fuito[sd]. */
5644 case 17: /* fsito[sd]. */
5645 case 24: /* ftoui[sd]. */
5646 case 25: /* ftouiz[sd]. */
5647 case 26: /* ftosi[sd]. */
5648 case 27: /* ftosiz[sd]. */
5649 /* These instructions will not bounce due to underflow. */
5654 case 3: /* fsqrt[sd]. */
5655 /* fsqrt cannot underflow, but it can (perhaps) overwrite
5656 registers to cause the erratum in previous instructions. */
5657 bfd_arm_vfp11_write_mask (destmask
, fd
);
5661 case 15: /* fcvt{ds,sd}. */
5665 bfd_arm_vfp11_write_mask (destmask
, fd
);
5667 /* Only FCVTSD can underflow. */
5668 if ((insn
& 0x100) != 0)
5687 /* Two-register transfer. */
5688 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
5690 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
5692 if ((insn
& 0x100000) == 0)
5695 bfd_arm_vfp11_write_mask (destmask
, fm
);
5698 bfd_arm_vfp11_write_mask (destmask
, fm
);
5699 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
5705 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
5707 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
5708 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
5712 case 0: /* Two-reg transfer. We should catch these above. */
5715 case 2: /* fldm[sdx]. */
5719 unsigned int i
, offset
= insn
& 0xff;
5724 for (i
= fd
; i
< fd
+ offset
; i
++)
5725 bfd_arm_vfp11_write_mask (destmask
, i
);
5729 case 4: /* fld[sd]. */
5731 bfd_arm_vfp11_write_mask (destmask
, fd
);
5740 /* Single-register transfer. Note L==0. */
5741 else if ((insn
& 0x0f100e10) == 0x0e000a10)
5743 unsigned int opcode
= (insn
>> 21) & 7;
5744 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
5748 case 0: /* fmsr/fmdlr. */
5749 case 1: /* fmdhr. */
5750 /* Mark fmdhr and fmdlr as writing to the whole of the DP
5751 destination register. I don't know if this is exactly right,
5752 but it is the conservative choice. */
5753 bfd_arm_vfp11_write_mask (destmask
, fn
);
5767 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
5770 /* Look for potentially-troublesome code sequences which might trigger the
5771 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
5772 (available from ARM) for details of the erratum. A short version is
5773 described in ld.texinfo. */
5776 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
5779 bfd_byte
*contents
= NULL
;
5781 int regs
[3], numregs
= 0;
5782 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5783 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
5785 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
5786 The states transition as follows:
5788 0 -> 1 (vector) or 0 -> 2 (scalar)
5789 A VFP FMAC-pipeline instruction has been seen. Fill
5790 regs[0]..regs[numregs-1] with its input operands. Remember this
5791 instruction in 'first_fmac'.
5794 Any instruction, except for a VFP instruction which overwrites
5799 A VFP instruction has been seen which overwrites any of regs[*].
5800 We must make a veneer! Reset state to 0 before examining next
5804 If we fail to match anything in state 2, reset to state 0 and reset
5805 the instruction pointer to the instruction after 'first_fmac'.
5807 If the VFP11 vector mode is in use, there must be at least two unrelated
5808 instructions between anti-dependent VFP11 instructions to properly avoid
5809 triggering the erratum, hence the use of the extra state 1. */
5811 /* If we are only performing a partial link do not bother
5812 to construct any glue. */
5813 if (link_info
->relocatable
)
5816 /* Skip if this bfd does not correspond to an ELF image. */
5817 if (! is_arm_elf (abfd
))
5820 /* We should have chosen a fix type by the time we get here. */
5821 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
5823 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
5826 /* Skip this BFD if it corresponds to an executable or dynamic object. */
5827 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
5830 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5832 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
5833 struct _arm_elf_section_data
*sec_data
;
5835 /* If we don't have executable progbits, we're not interested in this
5836 section. Also skip if section is to be excluded. */
5837 if (elf_section_type (sec
) != SHT_PROGBITS
5838 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
5839 || (sec
->flags
& SEC_EXCLUDE
) != 0
5840 || sec
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
5841 || sec
->output_section
== bfd_abs_section_ptr
5842 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
5845 sec_data
= elf32_arm_section_data (sec
);
5847 if (sec_data
->mapcount
== 0)
5850 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
5851 contents
= elf_section_data (sec
)->this_hdr
.contents
;
5852 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
5855 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
5856 elf32_arm_compare_mapping
);
5858 for (span
= 0; span
< sec_data
->mapcount
; span
++)
5860 unsigned int span_start
= sec_data
->map
[span
].vma
;
5861 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
5862 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
5863 char span_type
= sec_data
->map
[span
].type
;
5865 /* FIXME: Only ARM mode is supported at present. We may need to
5866 support Thumb-2 mode also at some point. */
5867 if (span_type
!= 'a')
5870 for (i
= span_start
; i
< span_end
;)
5872 unsigned int next_i
= i
+ 4;
5873 unsigned int insn
= bfd_big_endian (abfd
)
5874 ? (contents
[i
] << 24)
5875 | (contents
[i
+ 1] << 16)
5876 | (contents
[i
+ 2] << 8)
5878 : (contents
[i
+ 3] << 24)
5879 | (contents
[i
+ 2] << 16)
5880 | (contents
[i
+ 1] << 8)
5882 unsigned int writemask
= 0;
5883 enum bfd_arm_vfp11_pipe pipe
;
5888 pipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
5890 /* I'm assuming the VFP11 erratum can trigger with denorm
5891 operands on either the FMAC or the DS pipeline. This might
5892 lead to slightly overenthusiastic veneer insertion. */
5893 if (pipe
== VFP11_FMAC
|| pipe
== VFP11_DS
)
5895 state
= use_vector
? 1 : 2;
5897 veneer_of_insn
= insn
;
5903 int other_regs
[3], other_numregs
;
5904 pipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
5907 if (pipe
!= VFP11_BAD
5908 && bfd_arm_vfp11_antidependency (writemask
, regs
,
5918 int other_regs
[3], other_numregs
;
5919 pipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
5922 if (pipe
!= VFP11_BAD
5923 && bfd_arm_vfp11_antidependency (writemask
, regs
,
5929 next_i
= first_fmac
+ 4;
5935 abort (); /* Should be unreachable. */
5940 elf32_vfp11_erratum_list
*newerr
5941 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5944 errcount
= ++(elf32_arm_section_data (sec
)->erratumcount
);
5946 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
5951 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
5958 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
5963 newerr
->next
= sec_data
->erratumlist
;
5964 sec_data
->erratumlist
= newerr
;
5973 if (contents
!= NULL
5974 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5982 if (contents
!= NULL
5983 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5989 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
5990 after sections have been laid out, using specially-named symbols. */
5993 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
5994 struct bfd_link_info
*link_info
)
5997 struct elf32_arm_link_hash_table
*globals
;
6000 if (link_info
->relocatable
)
6003 /* Skip if this bfd does not correspond to an ELF image. */
6004 if (! is_arm_elf (abfd
))
6007 globals
= elf32_arm_hash_table (link_info
);
6009 tmp_name
= bfd_malloc ((bfd_size_type
) strlen
6010 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
6012 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6014 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
6015 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
6017 for (; errnode
!= NULL
; errnode
= errnode
->next
)
6019 struct elf_link_hash_entry
*myh
;
6022 switch (errnode
->type
)
6024 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
6025 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
6026 /* Find veneer symbol. */
6027 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
6028 errnode
->u
.b
.veneer
->u
.v
.id
);
6030 myh
= elf_link_hash_lookup
6031 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6034 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6035 "`%s'"), abfd
, tmp_name
);
6037 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6038 + myh
->root
.u
.def
.section
->output_offset
6039 + myh
->root
.u
.def
.value
;
6041 errnode
->u
.b
.veneer
->vma
= vma
;
6044 case VFP11_ERRATUM_ARM_VENEER
:
6045 case VFP11_ERRATUM_THUMB_VENEER
:
6046 /* Find return location. */
6047 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
6050 myh
= elf_link_hash_lookup
6051 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6054 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6055 "`%s'"), abfd
, tmp_name
);
6057 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6058 + myh
->root
.u
.def
.section
->output_offset
6059 + myh
->root
.u
.def
.value
;
6061 errnode
->u
.v
.branch
->vma
= vma
;
6074 /* Set target relocation values needed during linking. */
6077 bfd_elf32_arm_set_target_relocs (struct bfd
*output_bfd
,
6078 struct bfd_link_info
*link_info
,
6080 char * target2_type
,
6083 bfd_arm_vfp11_fix vfp11_fix
,
6084 int no_enum_warn
, int no_wchar_warn
,
6085 int pic_veneer
, int fix_cortex_a8
)
6087 struct elf32_arm_link_hash_table
*globals
;
6089 globals
= elf32_arm_hash_table (link_info
);
6091 globals
->target1_is_rel
= target1_is_rel
;
6092 if (strcmp (target2_type
, "rel") == 0)
6093 globals
->target2_reloc
= R_ARM_REL32
;
6094 else if (strcmp (target2_type
, "abs") == 0)
6095 globals
->target2_reloc
= R_ARM_ABS32
;
6096 else if (strcmp (target2_type
, "got-rel") == 0)
6097 globals
->target2_reloc
= R_ARM_GOT_PREL
;
6100 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6103 globals
->fix_v4bx
= fix_v4bx
;
6104 globals
->use_blx
|= use_blx
;
6105 globals
->vfp11_fix
= vfp11_fix
;
6106 globals
->pic_veneer
= pic_veneer
;
6107 globals
->fix_cortex_a8
= fix_cortex_a8
;
6109 BFD_ASSERT (is_arm_elf (output_bfd
));
6110 elf_arm_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
6111 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
6114 /* Replace the target offset of a Thumb bl or b.w instruction. */
6117 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
6123 BFD_ASSERT ((offset
& 1) == 0);
6125 upper
= bfd_get_16 (abfd
, insn
);
6126 lower
= bfd_get_16 (abfd
, insn
+ 2);
6127 reloc_sign
= (offset
< 0) ? 1 : 0;
6128 upper
= (upper
& ~(bfd_vma
) 0x7ff)
6129 | ((offset
>> 12) & 0x3ff)
6130 | (reloc_sign
<< 10);
6131 lower
= (lower
& ~(bfd_vma
) 0x2fff)
6132 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
6133 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
6134 | ((offset
>> 1) & 0x7ff);
6135 bfd_put_16 (abfd
, upper
, insn
);
6136 bfd_put_16 (abfd
, lower
, insn
+ 2);
6139 /* Thumb code calling an ARM function. */
6142 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
6146 asection
* input_section
,
6147 bfd_byte
* hit_data
,
6150 bfd_signed_vma addend
,
6152 char **error_message
)
6156 long int ret_offset
;
6157 struct elf_link_hash_entry
* myh
;
6158 struct elf32_arm_link_hash_table
* globals
;
6160 myh
= find_thumb_glue (info
, name
, error_message
);
6164 globals
= elf32_arm_hash_table (info
);
6166 BFD_ASSERT (globals
!= NULL
);
6167 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6169 my_offset
= myh
->root
.u
.def
.value
;
6171 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6172 THUMB2ARM_GLUE_SECTION_NAME
);
6174 BFD_ASSERT (s
!= NULL
);
6175 BFD_ASSERT (s
->contents
!= NULL
);
6176 BFD_ASSERT (s
->output_section
!= NULL
);
6178 if ((my_offset
& 0x01) == 0x01)
6181 && sym_sec
->owner
!= NULL
6182 && !INTERWORK_FLAG (sym_sec
->owner
))
6184 (*_bfd_error_handler
)
6185 (_("%B(%s): warning: interworking not enabled.\n"
6186 " first occurrence: %B: thumb call to arm"),
6187 sym_sec
->owner
, input_bfd
, name
);
6193 myh
->root
.u
.def
.value
= my_offset
;
6195 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
6196 s
->contents
+ my_offset
);
6198 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
6199 s
->contents
+ my_offset
+ 2);
6202 /* Address of destination of the stub. */
6203 ((bfd_signed_vma
) val
)
6205 /* Offset from the start of the current section
6206 to the start of the stubs. */
6208 /* Offset of the start of this stub from the start of the stubs. */
6210 /* Address of the start of the current section. */
6211 + s
->output_section
->vma
)
6212 /* The branch instruction is 4 bytes into the stub. */
6214 /* ARM branches work from the pc of the instruction + 8. */
6217 put_arm_insn (globals
, output_bfd
,
6218 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
6219 s
->contents
+ my_offset
+ 4);
6222 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
6224 /* Now go back and fix up the original BL insn to point to here. */
6226 /* Address of where the stub is located. */
6227 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
6228 /* Address of where the BL is located. */
6229 - (input_section
->output_section
->vma
+ input_section
->output_offset
6231 /* Addend in the relocation. */
6233 /* Biassing for PC-relative addressing. */
6236 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
6241 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
6243 static struct elf_link_hash_entry
*
6244 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
6251 char ** error_message
)
6254 long int ret_offset
;
6255 struct elf_link_hash_entry
* myh
;
6256 struct elf32_arm_link_hash_table
* globals
;
6258 myh
= find_arm_glue (info
, name
, error_message
);
6262 globals
= elf32_arm_hash_table (info
);
6264 BFD_ASSERT (globals
!= NULL
);
6265 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6267 my_offset
= myh
->root
.u
.def
.value
;
6269 if ((my_offset
& 0x01) == 0x01)
6272 && sym_sec
->owner
!= NULL
6273 && !INTERWORK_FLAG (sym_sec
->owner
))
6275 (*_bfd_error_handler
)
6276 (_("%B(%s): warning: interworking not enabled.\n"
6277 " first occurrence: %B: arm call to thumb"),
6278 sym_sec
->owner
, input_bfd
, name
);
6282 myh
->root
.u
.def
.value
= my_offset
;
6284 if (info
->shared
|| globals
->root
.is_relocatable_executable
6285 || globals
->pic_veneer
)
6287 /* For relocatable objects we can't use absolute addresses,
6288 so construct the address from a relative offset. */
6289 /* TODO: If the offset is small it's probably worth
6290 constructing the address with adds. */
6291 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
6292 s
->contents
+ my_offset
);
6293 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
6294 s
->contents
+ my_offset
+ 4);
6295 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
6296 s
->contents
+ my_offset
+ 8);
6297 /* Adjust the offset by 4 for the position of the add,
6298 and 8 for the pipeline offset. */
6299 ret_offset
= (val
- (s
->output_offset
6300 + s
->output_section
->vma
6303 bfd_put_32 (output_bfd
, ret_offset
,
6304 s
->contents
+ my_offset
+ 12);
6306 else if (globals
->use_blx
)
6308 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
6309 s
->contents
+ my_offset
);
6311 /* It's a thumb address. Add the low order bit. */
6312 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
6313 s
->contents
+ my_offset
+ 4);
6317 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
6318 s
->contents
+ my_offset
);
6320 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
6321 s
->contents
+ my_offset
+ 4);
6323 /* It's a thumb address. Add the low order bit. */
6324 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
6325 s
->contents
+ my_offset
+ 8);
6331 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
6336 /* Arm code calling a Thumb function. */
6339 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
6343 asection
* input_section
,
6344 bfd_byte
* hit_data
,
6347 bfd_signed_vma addend
,
6349 char **error_message
)
6351 unsigned long int tmp
;
6354 long int ret_offset
;
6355 struct elf_link_hash_entry
* myh
;
6356 struct elf32_arm_link_hash_table
* globals
;
6358 globals
= elf32_arm_hash_table (info
);
6360 BFD_ASSERT (globals
!= NULL
);
6361 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6363 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6364 ARM2THUMB_GLUE_SECTION_NAME
);
6365 BFD_ASSERT (s
!= NULL
);
6366 BFD_ASSERT (s
->contents
!= NULL
);
6367 BFD_ASSERT (s
->output_section
!= NULL
);
6369 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
6370 sym_sec
, val
, s
, error_message
);
6374 my_offset
= myh
->root
.u
.def
.value
;
6375 tmp
= bfd_get_32 (input_bfd
, hit_data
);
6376 tmp
= tmp
& 0xFF000000;
6378 /* Somehow these are both 4 too far, so subtract 8. */
6379 ret_offset
= (s
->output_offset
6381 + s
->output_section
->vma
6382 - (input_section
->output_offset
6383 + input_section
->output_section
->vma
6387 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
6389 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
6394 /* Populate Arm stub for an exported Thumb function. */
6397 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
6399 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
6401 struct elf_link_hash_entry
* myh
;
6402 struct elf32_arm_link_hash_entry
*eh
;
6403 struct elf32_arm_link_hash_table
* globals
;
6406 char *error_message
;
6408 eh
= elf32_arm_hash_entry (h
);
6409 /* Allocate stubs for exported Thumb functions on v4t. */
6410 if (eh
->export_glue
== NULL
)
6413 globals
= elf32_arm_hash_table (info
);
6415 BFD_ASSERT (globals
!= NULL
);
6416 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6418 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6419 ARM2THUMB_GLUE_SECTION_NAME
);
6420 BFD_ASSERT (s
!= NULL
);
6421 BFD_ASSERT (s
->contents
!= NULL
);
6422 BFD_ASSERT (s
->output_section
!= NULL
);
6424 sec
= eh
->export_glue
->root
.u
.def
.section
;
6426 BFD_ASSERT (sec
->output_section
!= NULL
);
6428 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
6429 + sec
->output_section
->vma
;
6431 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
6432 h
->root
.u
.def
.section
->owner
,
6433 globals
->obfd
, sec
, val
, s
,
6439 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
6442 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
6447 struct elf32_arm_link_hash_table
*globals
;
6449 globals
= elf32_arm_hash_table (info
);
6451 BFD_ASSERT (globals
!= NULL
);
6452 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6454 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6455 ARM_BX_GLUE_SECTION_NAME
);
6456 BFD_ASSERT (s
!= NULL
);
6457 BFD_ASSERT (s
->contents
!= NULL
);
6458 BFD_ASSERT (s
->output_section
!= NULL
);
6460 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
6462 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
6464 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
6466 p
= s
->contents
+ glue_addr
;
6467 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
6468 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
6469 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
6470 globals
->bx_glue_offset
[reg
] |= 1;
6473 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
6476 /* Generate Arm stubs for exported Thumb symbols. */
6478 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
6479 struct bfd_link_info
*link_info
)
6481 struct elf32_arm_link_hash_table
* globals
;
6483 if (link_info
== NULL
)
6484 /* Ignore this if we are not called by the ELF backend linker. */
6487 globals
= elf32_arm_hash_table (link_info
);
6488 /* If blx is available then exported Thumb symbols are OK and there is
6490 if (globals
->use_blx
)
6493 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
6497 /* Some relocations map to different relocations depending on the
6498 target. Return the real relocation. */
6501 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
6507 if (globals
->target1_is_rel
)
6513 return globals
->target2_reloc
;
6520 /* Return the base VMA address which should be subtracted from real addresses
6521 when resolving @dtpoff relocation.
6522 This is PT_TLS segment p_vaddr. */
6525 dtpoff_base (struct bfd_link_info
*info
)
6527 /* If tls_sec is NULL, we should have signalled an error already. */
6528 if (elf_hash_table (info
)->tls_sec
== NULL
)
6530 return elf_hash_table (info
)->tls_sec
->vma
;
6533 /* Return the relocation value for @tpoff relocation
6534 if STT_TLS virtual address is ADDRESS. */
6537 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
6539 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
6542 /* If tls_sec is NULL, we should have signalled an error already. */
6543 if (htab
->tls_sec
== NULL
)
6545 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
6546 return address
- htab
->tls_sec
->vma
+ base
;
6549 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
6550 VALUE is the relocation value. */
6552 static bfd_reloc_status_type
6553 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
6556 return bfd_reloc_overflow
;
6558 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
6559 bfd_put_32 (abfd
, value
, data
);
6560 return bfd_reloc_ok
;
6563 /* For a given value of n, calculate the value of G_n as required to
6564 deal with group relocations. We return it in the form of an
6565 encoded constant-and-rotation, together with the final residual. If n is
6566 specified as less than zero, then final_residual is filled with the
6567 input value and no further action is performed. */
6570 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
6574 bfd_vma encoded_g_n
= 0;
6575 bfd_vma residual
= value
; /* Also known as Y_n. */
6577 for (current_n
= 0; current_n
<= n
; current_n
++)
6581 /* Calculate which part of the value to mask. */
6588 /* Determine the most significant bit in the residual and
6589 align the resulting value to a 2-bit boundary. */
6590 for (msb
= 30; msb
>= 0; msb
-= 2)
6591 if (residual
& (3 << msb
))
6594 /* The desired shift is now (msb - 6), or zero, whichever
6601 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
6602 g_n
= residual
& (0xff << shift
);
6603 encoded_g_n
= (g_n
>> shift
)
6604 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
6606 /* Calculate the residual for the next time around. */
6610 *final_residual
= residual
;
6615 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
6616 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
6619 identify_add_or_sub (bfd_vma insn
)
6621 int opcode
= insn
& 0x1e00000;
6623 if (opcode
== 1 << 23) /* ADD */
6626 if (opcode
== 1 << 22) /* SUB */
6632 /* Perform a relocation as part of a final link. */
6634 static bfd_reloc_status_type
6635 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
6638 asection
* input_section
,
6639 bfd_byte
* contents
,
6640 Elf_Internal_Rela
* rel
,
6642 struct bfd_link_info
* info
,
6644 const char * sym_name
,
6646 struct elf_link_hash_entry
* h
,
6647 bfd_boolean
* unresolved_reloc_p
,
6648 char ** error_message
)
6650 unsigned long r_type
= howto
->type
;
6651 unsigned long r_symndx
;
6652 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
6653 bfd
* dynobj
= NULL
;
6654 Elf_Internal_Shdr
* symtab_hdr
;
6655 struct elf_link_hash_entry
** sym_hashes
;
6656 bfd_vma
* local_got_offsets
;
6657 asection
* sgot
= NULL
;
6658 asection
* splt
= NULL
;
6659 asection
* sreloc
= NULL
;
6661 bfd_signed_vma signed_addend
;
6662 struct elf32_arm_link_hash_table
* globals
;
6664 globals
= elf32_arm_hash_table (info
);
6666 BFD_ASSERT (is_arm_elf (input_bfd
));
6668 /* Some relocation types map to different relocations depending on the
6669 target. We pick the right one here. */
6670 r_type
= arm_real_reloc_type (globals
, r_type
);
6671 if (r_type
!= howto
->type
)
6672 howto
= elf32_arm_howto_from_type (r_type
);
6674 /* If the start address has been set, then set the EF_ARM_HASENTRY
6675 flag. Setting this more than once is redundant, but the cost is
6676 not too high, and it keeps the code simple.
6678 The test is done here, rather than somewhere else, because the
6679 start address is only set just before the final link commences.
6681 Note - if the user deliberately sets a start address of 0, the
6682 flag will not be set. */
6683 if (bfd_get_start_address (output_bfd
) != 0)
6684 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
6686 dynobj
= elf_hash_table (info
)->dynobj
;
6689 sgot
= bfd_get_section_by_name (dynobj
, ".got");
6690 splt
= bfd_get_section_by_name (dynobj
, ".plt");
6692 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
6693 sym_hashes
= elf_sym_hashes (input_bfd
);
6694 local_got_offsets
= elf_local_got_offsets (input_bfd
);
6695 r_symndx
= ELF32_R_SYM (rel
->r_info
);
6697 if (globals
->use_rel
)
6699 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
6701 if (addend
& ((howto
->src_mask
+ 1) >> 1))
6704 signed_addend
&= ~ howto
->src_mask
;
6705 signed_addend
|= addend
;
6708 signed_addend
= addend
;
6711 addend
= signed_addend
= rel
->r_addend
;
6716 /* We don't need to find a value for this symbol. It's just a
6718 *unresolved_reloc_p
= FALSE
;
6719 return bfd_reloc_ok
;
6722 if (!globals
->vxworks_p
)
6723 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
6727 case R_ARM_ABS32_NOI
:
6729 case R_ARM_REL32_NOI
:
6735 /* Handle relocations which should use the PLT entry. ABS32/REL32
6736 will use the symbol's value, which may point to a PLT entry, but we
6737 don't need to handle that here. If we created a PLT entry, all
6738 branches in this object should go to it, except if the PLT is too
6739 far away, in which case a long branch stub should be inserted. */
6740 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
6741 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
6742 && r_type
!= R_ARM_CALL
6743 && r_type
!= R_ARM_JUMP24
6744 && r_type
!= R_ARM_PLT32
)
6747 && h
->plt
.offset
!= (bfd_vma
) -1)
6749 /* If we've created a .plt section, and assigned a PLT entry to
6750 this function, it should not be known to bind locally. If
6751 it were, we would have cleared the PLT entry. */
6752 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info
, h
));
6754 value
= (splt
->output_section
->vma
6755 + splt
->output_offset
6757 *unresolved_reloc_p
= FALSE
;
6758 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
6759 contents
, rel
->r_offset
, value
,
6763 /* When generating a shared object or relocatable executable, these
6764 relocations are copied into the output file to be resolved at
6766 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
6767 && (input_section
->flags
& SEC_ALLOC
)
6768 && !(elf32_arm_hash_table (info
)->vxworks_p
6769 && strcmp (input_section
->output_section
->name
,
6771 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
6772 || !SYMBOL_CALLS_LOCAL (info
, h
))
6774 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6775 || h
->root
.type
!= bfd_link_hash_undefweak
)
6776 && r_type
!= R_ARM_PC24
6777 && r_type
!= R_ARM_CALL
6778 && r_type
!= R_ARM_JUMP24
6779 && r_type
!= R_ARM_PREL31
6780 && r_type
!= R_ARM_PLT32
)
6782 Elf_Internal_Rela outrel
;
6784 bfd_boolean skip
, relocate
;
6786 *unresolved_reloc_p
= FALSE
;
6790 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
6791 ! globals
->use_rel
);
6794 return bfd_reloc_notsupported
;
6800 outrel
.r_addend
= addend
;
6802 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
6804 if (outrel
.r_offset
== (bfd_vma
) -1)
6806 else if (outrel
.r_offset
== (bfd_vma
) -2)
6807 skip
= TRUE
, relocate
= TRUE
;
6808 outrel
.r_offset
+= (input_section
->output_section
->vma
6809 + input_section
->output_offset
);
6812 memset (&outrel
, 0, sizeof outrel
);
6817 || !h
->def_regular
))
6818 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
6823 /* This symbol is local, or marked to become local. */
6824 if (sym_flags
== STT_ARM_TFUNC
)
6826 if (globals
->symbian_p
)
6830 /* On Symbian OS, the data segment and text segement
6831 can be relocated independently. Therefore, we
6832 must indicate the segment to which this
6833 relocation is relative. The BPABI allows us to
6834 use any symbol in the right segment; we just use
6835 the section symbol as it is convenient. (We
6836 cannot use the symbol given by "h" directly as it
6837 will not appear in the dynamic symbol table.)
6839 Note that the dynamic linker ignores the section
6840 symbol value, so we don't subtract osec->vma
6841 from the emitted reloc addend. */
6843 osec
= sym_sec
->output_section
;
6845 osec
= input_section
->output_section
;
6846 symbol
= elf_section_data (osec
)->dynindx
;
6849 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
6851 if ((osec
->flags
& SEC_READONLY
) == 0
6852 && htab
->data_index_section
!= NULL
)
6853 osec
= htab
->data_index_section
;
6855 osec
= htab
->text_index_section
;
6856 symbol
= elf_section_data (osec
)->dynindx
;
6858 BFD_ASSERT (symbol
!= 0);
6861 /* On SVR4-ish systems, the dynamic loader cannot
6862 relocate the text and data segments independently,
6863 so the symbol does not matter. */
6865 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
6866 if (globals
->use_rel
)
6869 outrel
.r_addend
+= value
;
6872 loc
= sreloc
->contents
;
6873 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
6874 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
6876 /* If this reloc is against an external symbol, we do not want to
6877 fiddle with the addend. Otherwise, we need to include the symbol
6878 value so that it becomes an addend for the dynamic reloc. */
6880 return bfd_reloc_ok
;
6882 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
6883 contents
, rel
->r_offset
, value
,
6886 else switch (r_type
)
6889 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
6891 case R_ARM_XPC25
: /* Arm BLX instruction. */
6894 case R_ARM_PC24
: /* Arm B/BL instruction. */
6898 bfd_signed_vma branch_offset
;
6899 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
6901 if (r_type
== R_ARM_XPC25
)
6903 /* Check for Arm calling Arm function. */
6904 /* FIXME: Should we translate the instruction into a BL
6905 instruction instead ? */
6906 if (sym_flags
!= STT_ARM_TFUNC
)
6907 (*_bfd_error_handler
)
6908 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
6910 h
? h
->root
.root
.string
: "(local)");
6912 else if (r_type
== R_ARM_PC24
)
6914 /* Check for Arm calling Thumb function. */
6915 if (sym_flags
== STT_ARM_TFUNC
)
6917 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
6918 output_bfd
, input_section
,
6919 hit_data
, sym_sec
, rel
->r_offset
,
6920 signed_addend
, value
,
6922 return bfd_reloc_ok
;
6924 return bfd_reloc_dangerous
;
6928 /* Check if a stub has to be inserted because the
6929 destination is too far or we are changing mode. */
6930 if ( r_type
== R_ARM_CALL
6931 || r_type
== R_ARM_JUMP24
6932 || r_type
== R_ARM_PLT32
)
6934 /* If the call goes through a PLT entry, make sure to
6935 check distance to the right destination address. */
6936 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
6938 value
= (splt
->output_section
->vma
6939 + splt
->output_offset
6941 *unresolved_reloc_p
= FALSE
;
6944 from
= (input_section
->output_section
->vma
6945 + input_section
->output_offset
6947 branch_offset
= (bfd_signed_vma
)(value
- from
);
6949 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
6950 || branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
6951 || ((sym_flags
== STT_ARM_TFUNC
)
6952 && (((r_type
== R_ARM_CALL
) && !globals
->use_blx
)
6953 || (r_type
== R_ARM_JUMP24
)
6954 || (r_type
== R_ARM_PLT32
) ))
6957 /* The target is out of reach, so redirect the
6958 branch to the local stub for this function. */
6960 stub_entry
= elf32_arm_get_stub_entry (input_section
,
6963 if (stub_entry
!= NULL
)
6964 value
= (stub_entry
->stub_offset
6965 + stub_entry
->stub_sec
->output_offset
6966 + stub_entry
->stub_sec
->output_section
->vma
);
6970 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
6972 S is the address of the symbol in the relocation.
6973 P is address of the instruction being relocated.
6974 A is the addend (extracted from the instruction) in bytes.
6976 S is held in 'value'.
6977 P is the base address of the section containing the
6978 instruction plus the offset of the reloc into that
6980 (input_section->output_section->vma +
6981 input_section->output_offset +
6983 A is the addend, converted into bytes, ie:
6986 Note: None of these operations have knowledge of the pipeline
6987 size of the processor, thus it is up to the assembler to
6988 encode this information into the addend. */
6989 value
-= (input_section
->output_section
->vma
6990 + input_section
->output_offset
);
6991 value
-= rel
->r_offset
;
6992 if (globals
->use_rel
)
6993 value
+= (signed_addend
<< howto
->size
);
6995 /* RELA addends do not have to be adjusted by howto->size. */
6996 value
+= signed_addend
;
6998 signed_addend
= value
;
6999 signed_addend
>>= howto
->rightshift
;
7001 /* A branch to an undefined weak symbol is turned into a jump to
7002 the next instruction unless a PLT entry will be created. */
7003 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
7004 && !(splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1))
7006 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000)
7011 /* Perform a signed range check. */
7012 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
7013 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
7014 return bfd_reloc_overflow
;
7016 addend
= (value
& 2);
7018 value
= (signed_addend
& howto
->dst_mask
)
7019 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
7021 if (r_type
== R_ARM_CALL
)
7023 /* Set the H bit in the BLX instruction. */
7024 if (sym_flags
== STT_ARM_TFUNC
)
7029 value
&= ~(bfd_vma
)(1 << 24);
7032 /* Select the correct instruction (BL or BLX). */
7033 /* Only if we are not handling a BL to a stub. In this
7034 case, mode switching is performed by the stub. */
7035 if (sym_flags
== STT_ARM_TFUNC
&& !stub_entry
)
7039 value
&= ~(bfd_vma
)(1 << 28);
7049 if (sym_flags
== STT_ARM_TFUNC
)
7053 case R_ARM_ABS32_NOI
:
7059 if (sym_flags
== STT_ARM_TFUNC
)
7061 value
-= (input_section
->output_section
->vma
7062 + input_section
->output_offset
+ rel
->r_offset
);
7065 case R_ARM_REL32_NOI
:
7067 value
-= (input_section
->output_section
->vma
7068 + input_section
->output_offset
+ rel
->r_offset
);
7072 value
-= (input_section
->output_section
->vma
7073 + input_section
->output_offset
+ rel
->r_offset
);
7074 value
+= signed_addend
;
7075 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
7077 /* Check for overflow. */
7078 if ((value
^ (value
>> 1)) & (1 << 30))
7079 return bfd_reloc_overflow
;
7081 value
&= 0x7fffffff;
7082 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
7083 if (sym_flags
== STT_ARM_TFUNC
)
7088 bfd_put_32 (input_bfd
, value
, hit_data
);
7089 return bfd_reloc_ok
;
7093 if ((long) value
> 0x7f || (long) value
< -0x80)
7094 return bfd_reloc_overflow
;
7096 bfd_put_8 (input_bfd
, value
, hit_data
);
7097 return bfd_reloc_ok
;
7102 if ((long) value
> 0x7fff || (long) value
< -0x8000)
7103 return bfd_reloc_overflow
;
7105 bfd_put_16 (input_bfd
, value
, hit_data
);
7106 return bfd_reloc_ok
;
7108 case R_ARM_THM_ABS5
:
7109 /* Support ldr and str instructions for the thumb. */
7110 if (globals
->use_rel
)
7112 /* Need to refetch addend. */
7113 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
7114 /* ??? Need to determine shift amount from operand size. */
7115 addend
>>= howto
->rightshift
;
7119 /* ??? Isn't value unsigned? */
7120 if ((long) value
> 0x1f || (long) value
< -0x10)
7121 return bfd_reloc_overflow
;
7123 /* ??? Value needs to be properly shifted into place first. */
7124 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
7125 bfd_put_16 (input_bfd
, value
, hit_data
);
7126 return bfd_reloc_ok
;
7128 case R_ARM_THM_ALU_PREL_11_0
:
7129 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
7132 bfd_signed_vma relocation
;
7134 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
7135 | bfd_get_16 (input_bfd
, hit_data
+ 2);
7137 if (globals
->use_rel
)
7139 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
7140 | ((insn
& (1 << 26)) >> 15);
7141 if (insn
& 0xf00000)
7142 signed_addend
= -signed_addend
;
7145 relocation
= value
+ signed_addend
;
7146 relocation
-= (input_section
->output_section
->vma
7147 + input_section
->output_offset
7150 value
= abs (relocation
);
7152 if (value
>= 0x1000)
7153 return bfd_reloc_overflow
;
7155 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
7156 | ((value
& 0x700) << 4)
7157 | ((value
& 0x800) << 15);
7161 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
7162 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
7164 return bfd_reloc_ok
;
7167 case R_ARM_THM_PC12
:
7168 /* Corresponds to: ldr.w reg, [pc, #offset]. */
7171 bfd_signed_vma relocation
;
7173 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
7174 | bfd_get_16 (input_bfd
, hit_data
+ 2);
7176 if (globals
->use_rel
)
7178 signed_addend
= insn
& 0xfff;
7179 if (!(insn
& (1 << 23)))
7180 signed_addend
= -signed_addend
;
7183 relocation
= value
+ signed_addend
;
7184 relocation
-= (input_section
->output_section
->vma
7185 + input_section
->output_offset
7188 value
= abs (relocation
);
7190 if (value
>= 0x1000)
7191 return bfd_reloc_overflow
;
7193 insn
= (insn
& 0xff7ff000) | value
;
7194 if (relocation
>= 0)
7197 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
7198 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
7200 return bfd_reloc_ok
;
7203 case R_ARM_THM_XPC22
:
7204 case R_ARM_THM_CALL
:
7205 case R_ARM_THM_JUMP24
:
7206 /* Thumb BL (branch long instruction). */
7210 bfd_boolean overflow
= FALSE
;
7211 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
7212 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
7213 bfd_signed_vma reloc_signed_max
;
7214 bfd_signed_vma reloc_signed_min
;
7216 bfd_signed_vma signed_check
;
7218 int thumb2
= using_thumb2 (globals
);
7220 /* A branch to an undefined weak symbol is turned into a jump to
7221 the next instruction unless a PLT entry will be created. */
7222 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
7223 && !(splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1))
7225 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
7226 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
7227 return bfd_reloc_ok
;
7230 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
7231 with Thumb-1) involving the J1 and J2 bits. */
7232 if (globals
->use_rel
)
7234 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
7235 bfd_vma upper
= upper_insn
& 0x3ff;
7236 bfd_vma lower
= lower_insn
& 0x7ff;
7237 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
7238 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
7239 bfd_vma i1
= j1
^ s
? 0 : 1;
7240 bfd_vma i2
= j2
^ s
? 0 : 1;
7242 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
7244 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
7246 signed_addend
= addend
;
7249 if (r_type
== R_ARM_THM_XPC22
)
7251 /* Check for Thumb to Thumb call. */
7252 /* FIXME: Should we translate the instruction into a BL
7253 instruction instead ? */
7254 if (sym_flags
== STT_ARM_TFUNC
)
7255 (*_bfd_error_handler
)
7256 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
7258 h
? h
->root
.root
.string
: "(local)");
7262 /* If it is not a call to Thumb, assume call to Arm.
7263 If it is a call relative to a section name, then it is not a
7264 function call at all, but rather a long jump. Calls through
7265 the PLT do not require stubs. */
7266 if (sym_flags
!= STT_ARM_TFUNC
&& sym_flags
!= STT_SECTION
7267 && (h
== NULL
|| splt
== NULL
7268 || h
->plt
.offset
== (bfd_vma
) -1))
7270 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
7272 /* Convert BL to BLX. */
7273 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7275 else if (( r_type
!= R_ARM_THM_CALL
)
7276 && (r_type
!= R_ARM_THM_JUMP24
))
7278 if (elf32_thumb_to_arm_stub
7279 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
7280 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
7282 return bfd_reloc_ok
;
7284 return bfd_reloc_dangerous
;
7287 else if (sym_flags
== STT_ARM_TFUNC
&& globals
->use_blx
7288 && r_type
== R_ARM_THM_CALL
)
7290 /* Make sure this is a BL. */
7291 lower_insn
|= 0x1800;
7295 /* Handle calls via the PLT. */
7296 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
7298 value
= (splt
->output_section
->vma
7299 + splt
->output_offset
7301 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
7303 /* If the Thumb BLX instruction is available, convert the
7304 BL to a BLX instruction to call the ARM-mode PLT entry. */
7305 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7308 /* Target the Thumb stub before the ARM PLT entry. */
7309 value
-= PLT_THUMB_STUB_SIZE
;
7310 *unresolved_reloc_p
= FALSE
;
7313 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
7315 /* Check if a stub has to be inserted because the destination
7318 bfd_signed_vma branch_offset
;
7319 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
7321 from
= (input_section
->output_section
->vma
7322 + input_section
->output_offset
7324 branch_offset
= (bfd_signed_vma
)(value
- from
);
7327 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
7328 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
7331 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
7332 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
7333 || ((sym_flags
!= STT_ARM_TFUNC
)
7334 && (((r_type
== R_ARM_THM_CALL
) && !globals
->use_blx
)
7335 || r_type
== R_ARM_THM_JUMP24
)))
7337 /* The target is out of reach or we are changing modes, so
7338 redirect the branch to the local stub for this
7340 stub_entry
= elf32_arm_get_stub_entry (input_section
,
7343 if (stub_entry
!= NULL
)
7344 value
= (stub_entry
->stub_offset
7345 + stub_entry
->stub_sec
->output_offset
7346 + stub_entry
->stub_sec
->output_section
->vma
);
7348 /* If this call becomes a call to Arm, force BLX. */
7349 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
7352 && !arm_stub_is_thumb (stub_entry
->stub_type
))
7353 || (sym_flags
!= STT_ARM_TFUNC
))
7354 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7359 relocation
= value
+ signed_addend
;
7361 relocation
-= (input_section
->output_section
->vma
7362 + input_section
->output_offset
7365 check
= relocation
>> howto
->rightshift
;
7367 /* If this is a signed value, the rightshift just dropped
7368 leading 1 bits (assuming twos complement). */
7369 if ((bfd_signed_vma
) relocation
>= 0)
7370 signed_check
= check
;
7372 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
7374 /* Calculate the permissable maximum and minimum values for
7375 this relocation according to whether we're relocating for
7377 bitsize
= howto
->bitsize
;
7380 reloc_signed_max
= ((1 << (bitsize
- 1)) - 1) >> howto
->rightshift
;
7381 reloc_signed_min
= ~reloc_signed_max
;
7383 /* Assumes two's complement. */
7384 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7387 if ((lower_insn
& 0x5000) == 0x4000)
7388 /* For a BLX instruction, make sure that the relocation is rounded up
7389 to a word boundary. This follows the semantics of the instruction
7390 which specifies that bit 1 of the target address will come from bit
7391 1 of the base address. */
7392 relocation
= (relocation
+ 2) & ~ 3;
7394 /* Put RELOCATION back into the insn. Assumes two's complement.
7395 We use the Thumb-2 encoding, which is safe even if dealing with
7396 a Thumb-1 instruction by virtue of our overflow check above. */
7397 reloc_sign
= (signed_check
< 0) ? 1 : 0;
7398 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
7399 | ((relocation
>> 12) & 0x3ff)
7400 | (reloc_sign
<< 10);
7401 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
7402 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
7403 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
7404 | ((relocation
>> 1) & 0x7ff);
7406 /* Put the relocated value back in the object file: */
7407 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
7408 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
7410 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
7414 case R_ARM_THM_JUMP19
:
7415 /* Thumb32 conditional branch instruction. */
7418 bfd_boolean overflow
= FALSE
;
7419 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
7420 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
7421 bfd_signed_vma reloc_signed_max
= 0xffffe;
7422 bfd_signed_vma reloc_signed_min
= -0x100000;
7423 bfd_signed_vma signed_check
;
7425 /* Need to refetch the addend, reconstruct the top three bits,
7426 and squish the two 11 bit pieces together. */
7427 if (globals
->use_rel
)
7429 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
7430 bfd_vma upper
= (upper_insn
& 0x003f);
7431 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
7432 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
7433 bfd_vma lower
= (lower_insn
& 0x07ff);
7438 upper
-= 0x0100; /* Sign extend. */
7440 addend
= (upper
<< 12) | (lower
<< 1);
7441 signed_addend
= addend
;
7444 /* Handle calls via the PLT. */
7445 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
7447 value
= (splt
->output_section
->vma
7448 + splt
->output_offset
7450 /* Target the Thumb stub before the ARM PLT entry. */
7451 value
-= PLT_THUMB_STUB_SIZE
;
7452 *unresolved_reloc_p
= FALSE
;
7455 /* ??? Should handle interworking? GCC might someday try to
7456 use this for tail calls. */
7458 relocation
= value
+ signed_addend
;
7459 relocation
-= (input_section
->output_section
->vma
7460 + input_section
->output_offset
7462 signed_check
= (bfd_signed_vma
) relocation
;
7464 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7467 /* Put RELOCATION back into the insn. */
7469 bfd_vma S
= (relocation
& 0x00100000) >> 20;
7470 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
7471 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
7472 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
7473 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
7475 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
7476 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
7479 /* Put the relocated value back in the object file: */
7480 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
7481 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
7483 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
7486 case R_ARM_THM_JUMP11
:
7487 case R_ARM_THM_JUMP8
:
7488 case R_ARM_THM_JUMP6
:
7489 /* Thumb B (branch) instruction). */
7491 bfd_signed_vma relocation
;
7492 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
7493 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
7494 bfd_signed_vma signed_check
;
7496 /* CZB cannot jump backward. */
7497 if (r_type
== R_ARM_THM_JUMP6
)
7498 reloc_signed_min
= 0;
7500 if (globals
->use_rel
)
7502 /* Need to refetch addend. */
7503 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
7504 if (addend
& ((howto
->src_mask
+ 1) >> 1))
7507 signed_addend
&= ~ howto
->src_mask
;
7508 signed_addend
|= addend
;
7511 signed_addend
= addend
;
7512 /* The value in the insn has been right shifted. We need to
7513 undo this, so that we can perform the address calculation
7514 in terms of bytes. */
7515 signed_addend
<<= howto
->rightshift
;
7517 relocation
= value
+ signed_addend
;
7519 relocation
-= (input_section
->output_section
->vma
7520 + input_section
->output_offset
7523 relocation
>>= howto
->rightshift
;
7524 signed_check
= relocation
;
7526 if (r_type
== R_ARM_THM_JUMP6
)
7527 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
7529 relocation
&= howto
->dst_mask
;
7530 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
7532 bfd_put_16 (input_bfd
, relocation
, hit_data
);
7534 /* Assumes two's complement. */
7535 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7536 return bfd_reloc_overflow
;
7538 return bfd_reloc_ok
;
7541 case R_ARM_ALU_PCREL7_0
:
7542 case R_ARM_ALU_PCREL15_8
:
7543 case R_ARM_ALU_PCREL23_15
:
7548 insn
= bfd_get_32 (input_bfd
, hit_data
);
7549 if (globals
->use_rel
)
7551 /* Extract the addend. */
7552 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
7553 signed_addend
= addend
;
7555 relocation
= value
+ signed_addend
;
7557 relocation
-= (input_section
->output_section
->vma
7558 + input_section
->output_offset
7560 insn
= (insn
& ~0xfff)
7561 | ((howto
->bitpos
<< 7) & 0xf00)
7562 | ((relocation
>> howto
->bitpos
) & 0xff);
7563 bfd_put_32 (input_bfd
, value
, hit_data
);
7565 return bfd_reloc_ok
;
7567 case R_ARM_GNU_VTINHERIT
:
7568 case R_ARM_GNU_VTENTRY
:
7569 return bfd_reloc_ok
;
7571 case R_ARM_GOTOFF32
:
7572 /* Relocation is relative to the start of the
7573 global offset table. */
7575 BFD_ASSERT (sgot
!= NULL
);
7577 return bfd_reloc_notsupported
;
7579 /* If we are addressing a Thumb function, we need to adjust the
7580 address by one, so that attempts to call the function pointer will
7581 correctly interpret it as Thumb code. */
7582 if (sym_flags
== STT_ARM_TFUNC
)
7585 /* Note that sgot->output_offset is not involved in this
7586 calculation. We always want the start of .got. If we
7587 define _GLOBAL_OFFSET_TABLE in a different way, as is
7588 permitted by the ABI, we might have to change this
7590 value
-= sgot
->output_section
->vma
;
7591 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7592 contents
, rel
->r_offset
, value
,
7596 /* Use global offset table as symbol value. */
7597 BFD_ASSERT (sgot
!= NULL
);
7600 return bfd_reloc_notsupported
;
7602 *unresolved_reloc_p
= FALSE
;
7603 value
= sgot
->output_section
->vma
;
7604 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7605 contents
, rel
->r_offset
, value
,
7609 case R_ARM_GOT_PREL
:
7610 /* Relocation is to the entry for this symbol in the
7611 global offset table. */
7613 return bfd_reloc_notsupported
;
7620 off
= h
->got
.offset
;
7621 BFD_ASSERT (off
!= (bfd_vma
) -1);
7622 dyn
= globals
->root
.dynamic_sections_created
;
7624 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
7626 && SYMBOL_REFERENCES_LOCAL (info
, h
))
7627 || (ELF_ST_VISIBILITY (h
->other
)
7628 && h
->root
.type
== bfd_link_hash_undefweak
))
7630 /* This is actually a static link, or it is a -Bsymbolic link
7631 and the symbol is defined locally. We must initialize this
7632 entry in the global offset table. Since the offset must
7633 always be a multiple of 4, we use the least significant bit
7634 to record whether we have initialized it already.
7636 When doing a dynamic link, we create a .rel(a).got relocation
7637 entry to initialize the value. This is done in the
7638 finish_dynamic_symbol routine. */
7643 /* If we are addressing a Thumb function, we need to
7644 adjust the address by one, so that attempts to
7645 call the function pointer will correctly
7646 interpret it as Thumb code. */
7647 if (sym_flags
== STT_ARM_TFUNC
)
7650 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
7655 *unresolved_reloc_p
= FALSE
;
7657 value
= sgot
->output_offset
+ off
;
7663 BFD_ASSERT (local_got_offsets
!= NULL
&&
7664 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
7666 off
= local_got_offsets
[r_symndx
];
7668 /* The offset must always be a multiple of 4. We use the
7669 least significant bit to record whether we have already
7670 generated the necessary reloc. */
7675 /* If we are addressing a Thumb function, we need to
7676 adjust the address by one, so that attempts to
7677 call the function pointer will correctly
7678 interpret it as Thumb code. */
7679 if (sym_flags
== STT_ARM_TFUNC
)
7682 if (globals
->use_rel
)
7683 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
7688 Elf_Internal_Rela outrel
;
7691 srelgot
= (bfd_get_section_by_name
7692 (dynobj
, RELOC_SECTION (globals
, ".got")));
7693 BFD_ASSERT (srelgot
!= NULL
);
7695 outrel
.r_addend
= addend
+ value
;
7696 outrel
.r_offset
= (sgot
->output_section
->vma
7697 + sgot
->output_offset
7699 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
7700 loc
= srelgot
->contents
;
7701 loc
+= srelgot
->reloc_count
++ * RELOC_SIZE (globals
);
7702 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7705 local_got_offsets
[r_symndx
] |= 1;
7708 value
= sgot
->output_offset
+ off
;
7710 if (r_type
!= R_ARM_GOT32
)
7711 value
+= sgot
->output_section
->vma
;
7713 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7714 contents
, rel
->r_offset
, value
,
7717 case R_ARM_TLS_LDO32
:
7718 value
= value
- dtpoff_base (info
);
7720 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7721 contents
, rel
->r_offset
, value
,
7724 case R_ARM_TLS_LDM32
:
7728 if (globals
->sgot
== NULL
)
7731 off
= globals
->tls_ldm_got
.offset
;
7737 /* If we don't know the module number, create a relocation
7741 Elf_Internal_Rela outrel
;
7744 if (globals
->srelgot
== NULL
)
7747 outrel
.r_addend
= 0;
7748 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
7749 + globals
->sgot
->output_offset
+ off
);
7750 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
7752 if (globals
->use_rel
)
7753 bfd_put_32 (output_bfd
, outrel
.r_addend
,
7754 globals
->sgot
->contents
+ off
);
7756 loc
= globals
->srelgot
->contents
;
7757 loc
+= globals
->srelgot
->reloc_count
++ * RELOC_SIZE (globals
);
7758 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7761 bfd_put_32 (output_bfd
, 1, globals
->sgot
->contents
+ off
);
7763 globals
->tls_ldm_got
.offset
|= 1;
7766 value
= globals
->sgot
->output_section
->vma
+ globals
->sgot
->output_offset
+ off
7767 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
7769 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7770 contents
, rel
->r_offset
, value
,
7774 case R_ARM_TLS_GD32
:
7775 case R_ARM_TLS_IE32
:
7781 if (globals
->sgot
== NULL
)
7788 dyn
= globals
->root
.dynamic_sections_created
;
7789 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
7791 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
7793 *unresolved_reloc_p
= FALSE
;
7796 off
= h
->got
.offset
;
7797 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
7801 if (local_got_offsets
== NULL
)
7803 off
= local_got_offsets
[r_symndx
];
7804 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
7807 if (tls_type
== GOT_UNKNOWN
)
7814 bfd_boolean need_relocs
= FALSE
;
7815 Elf_Internal_Rela outrel
;
7816 bfd_byte
*loc
= NULL
;
7819 /* The GOT entries have not been initialized yet. Do it
7820 now, and emit any relocations. If both an IE GOT and a
7821 GD GOT are necessary, we emit the GD first. */
7823 if ((info
->shared
|| indx
!= 0)
7825 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
7826 || h
->root
.type
!= bfd_link_hash_undefweak
))
7829 if (globals
->srelgot
== NULL
)
7831 loc
= globals
->srelgot
->contents
;
7832 loc
+= globals
->srelgot
->reloc_count
* RELOC_SIZE (globals
);
7835 if (tls_type
& GOT_TLS_GD
)
7839 outrel
.r_addend
= 0;
7840 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
7841 + globals
->sgot
->output_offset
7843 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
7845 if (globals
->use_rel
)
7846 bfd_put_32 (output_bfd
, outrel
.r_addend
,
7847 globals
->sgot
->contents
+ cur_off
);
7849 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7850 globals
->srelgot
->reloc_count
++;
7851 loc
+= RELOC_SIZE (globals
);
7854 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
7855 globals
->sgot
->contents
+ cur_off
+ 4);
7858 outrel
.r_addend
= 0;
7859 outrel
.r_info
= ELF32_R_INFO (indx
,
7860 R_ARM_TLS_DTPOFF32
);
7861 outrel
.r_offset
+= 4;
7863 if (globals
->use_rel
)
7864 bfd_put_32 (output_bfd
, outrel
.r_addend
,
7865 globals
->sgot
->contents
+ cur_off
+ 4);
7868 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7869 globals
->srelgot
->reloc_count
++;
7870 loc
+= RELOC_SIZE (globals
);
7875 /* If we are not emitting relocations for a
7876 general dynamic reference, then we must be in a
7877 static link or an executable link with the
7878 symbol binding locally. Mark it as belonging
7879 to module 1, the executable. */
7880 bfd_put_32 (output_bfd
, 1,
7881 globals
->sgot
->contents
+ cur_off
);
7882 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
7883 globals
->sgot
->contents
+ cur_off
+ 4);
7889 if (tls_type
& GOT_TLS_IE
)
7894 outrel
.r_addend
= value
- dtpoff_base (info
);
7896 outrel
.r_addend
= 0;
7897 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
7898 + globals
->sgot
->output_offset
7900 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
7902 if (globals
->use_rel
)
7903 bfd_put_32 (output_bfd
, outrel
.r_addend
,
7904 globals
->sgot
->contents
+ cur_off
);
7906 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7907 globals
->srelgot
->reloc_count
++;
7908 loc
+= RELOC_SIZE (globals
);
7911 bfd_put_32 (output_bfd
, tpoff (info
, value
),
7912 globals
->sgot
->contents
+ cur_off
);
7919 local_got_offsets
[r_symndx
] |= 1;
7922 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
7924 value
= globals
->sgot
->output_section
->vma
+ globals
->sgot
->output_offset
+ off
7925 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
7927 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7928 contents
, rel
->r_offset
, value
,
7932 case R_ARM_TLS_LE32
:
7935 (*_bfd_error_handler
)
7936 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
7937 input_bfd
, input_section
,
7938 (long) rel
->r_offset
, howto
->name
);
7942 value
= tpoff (info
, value
);
7944 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7945 contents
, rel
->r_offset
, value
,
7949 if (globals
->fix_v4bx
)
7951 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
7953 /* Ensure that we have a BX instruction. */
7954 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
7956 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
7958 /* Branch to veneer. */
7960 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
7961 glue_addr
-= input_section
->output_section
->vma
7962 + input_section
->output_offset
7963 + rel
->r_offset
+ 8;
7964 insn
= (insn
& 0xf0000000) | 0x0a000000
7965 | ((glue_addr
>> 2) & 0x00ffffff);
7969 /* Preserve Rm (lowest four bits) and the condition code
7970 (highest four bits). Other bits encode MOV PC,Rm. */
7971 insn
= (insn
& 0xf000000f) | 0x01a0f000;
7974 bfd_put_32 (input_bfd
, insn
, hit_data
);
7976 return bfd_reloc_ok
;
7978 case R_ARM_MOVW_ABS_NC
:
7979 case R_ARM_MOVT_ABS
:
7980 case R_ARM_MOVW_PREL_NC
:
7981 case R_ARM_MOVT_PREL
:
7982 /* Until we properly support segment-base-relative addressing then
7983 we assume the segment base to be zero, as for the group relocations.
7984 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
7985 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
7986 case R_ARM_MOVW_BREL_NC
:
7987 case R_ARM_MOVW_BREL
:
7988 case R_ARM_MOVT_BREL
:
7990 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
7992 if (globals
->use_rel
)
7994 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
7995 signed_addend
= (addend
^ 0x8000) - 0x8000;
7998 value
+= signed_addend
;
8000 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
8001 value
-= (input_section
->output_section
->vma
8002 + input_section
->output_offset
+ rel
->r_offset
);
8004 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
8005 return bfd_reloc_overflow
;
8007 if (sym_flags
== STT_ARM_TFUNC
)
8010 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
8011 || r_type
== R_ARM_MOVT_BREL
)
8015 insn
|= value
& 0xfff;
8016 insn
|= (value
& 0xf000) << 4;
8017 bfd_put_32 (input_bfd
, insn
, hit_data
);
8019 return bfd_reloc_ok
;
8021 case R_ARM_THM_MOVW_ABS_NC
:
8022 case R_ARM_THM_MOVT_ABS
:
8023 case R_ARM_THM_MOVW_PREL_NC
:
8024 case R_ARM_THM_MOVT_PREL
:
8025 /* Until we properly support segment-base-relative addressing then
8026 we assume the segment base to be zero, as for the above relocations.
8027 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
8028 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
8029 as R_ARM_THM_MOVT_ABS. */
8030 case R_ARM_THM_MOVW_BREL_NC
:
8031 case R_ARM_THM_MOVW_BREL
:
8032 case R_ARM_THM_MOVT_BREL
:
8036 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
8037 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
8039 if (globals
->use_rel
)
8041 addend
= ((insn
>> 4) & 0xf000)
8042 | ((insn
>> 15) & 0x0800)
8043 | ((insn
>> 4) & 0x0700)
8045 signed_addend
= (addend
^ 0x8000) - 0x8000;
8048 value
+= signed_addend
;
8050 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
8051 value
-= (input_section
->output_section
->vma
8052 + input_section
->output_offset
+ rel
->r_offset
);
8054 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
8055 return bfd_reloc_overflow
;
8057 if (sym_flags
== STT_ARM_TFUNC
)
8060 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
8061 || r_type
== R_ARM_THM_MOVT_BREL
)
8065 insn
|= (value
& 0xf000) << 4;
8066 insn
|= (value
& 0x0800) << 15;
8067 insn
|= (value
& 0x0700) << 4;
8068 insn
|= (value
& 0x00ff);
8070 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8071 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8073 return bfd_reloc_ok
;
8075 case R_ARM_ALU_PC_G0_NC
:
8076 case R_ARM_ALU_PC_G1_NC
:
8077 case R_ARM_ALU_PC_G0
:
8078 case R_ARM_ALU_PC_G1
:
8079 case R_ARM_ALU_PC_G2
:
8080 case R_ARM_ALU_SB_G0_NC
:
8081 case R_ARM_ALU_SB_G1_NC
:
8082 case R_ARM_ALU_SB_G0
:
8083 case R_ARM_ALU_SB_G1
:
8084 case R_ARM_ALU_SB_G2
:
8086 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8087 bfd_vma pc
= input_section
->output_section
->vma
8088 + input_section
->output_offset
+ rel
->r_offset
;
8089 /* sb should be the origin of the *segment* containing the symbol.
8090 It is not clear how to obtain this OS-dependent value, so we
8091 make an arbitrary choice of zero. */
8095 bfd_signed_vma signed_value
;
8098 /* Determine which group of bits to select. */
8101 case R_ARM_ALU_PC_G0_NC
:
8102 case R_ARM_ALU_PC_G0
:
8103 case R_ARM_ALU_SB_G0_NC
:
8104 case R_ARM_ALU_SB_G0
:
8108 case R_ARM_ALU_PC_G1_NC
:
8109 case R_ARM_ALU_PC_G1
:
8110 case R_ARM_ALU_SB_G1_NC
:
8111 case R_ARM_ALU_SB_G1
:
8115 case R_ARM_ALU_PC_G2
:
8116 case R_ARM_ALU_SB_G2
:
8124 /* If REL, extract the addend from the insn. If RELA, it will
8125 have already been fetched for us. */
8126 if (globals
->use_rel
)
8129 bfd_vma constant
= insn
& 0xff;
8130 bfd_vma rotation
= (insn
& 0xf00) >> 8;
8133 signed_addend
= constant
;
8136 /* Compensate for the fact that in the instruction, the
8137 rotation is stored in multiples of 2 bits. */
8140 /* Rotate "constant" right by "rotation" bits. */
8141 signed_addend
= (constant
>> rotation
) |
8142 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
8145 /* Determine if the instruction is an ADD or a SUB.
8146 (For REL, this determines the sign of the addend.) */
8147 negative
= identify_add_or_sub (insn
);
8150 (*_bfd_error_handler
)
8151 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
8152 input_bfd
, input_section
,
8153 (long) rel
->r_offset
, howto
->name
);
8154 return bfd_reloc_overflow
;
8157 signed_addend
*= negative
;
8160 /* Compute the value (X) to go in the place. */
8161 if (r_type
== R_ARM_ALU_PC_G0_NC
8162 || r_type
== R_ARM_ALU_PC_G1_NC
8163 || r_type
== R_ARM_ALU_PC_G0
8164 || r_type
== R_ARM_ALU_PC_G1
8165 || r_type
== R_ARM_ALU_PC_G2
)
8167 signed_value
= value
- pc
+ signed_addend
;
8169 /* Section base relative. */
8170 signed_value
= value
- sb
+ signed_addend
;
8172 /* If the target symbol is a Thumb function, then set the
8173 Thumb bit in the address. */
8174 if (sym_flags
== STT_ARM_TFUNC
)
8177 /* Calculate the value of the relevant G_n, in encoded
8178 constant-with-rotation format. */
8179 g_n
= calculate_group_reloc_mask (abs (signed_value
), group
,
8182 /* Check for overflow if required. */
8183 if ((r_type
== R_ARM_ALU_PC_G0
8184 || r_type
== R_ARM_ALU_PC_G1
8185 || r_type
== R_ARM_ALU_PC_G2
8186 || r_type
== R_ARM_ALU_SB_G0
8187 || r_type
== R_ARM_ALU_SB_G1
8188 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
8190 (*_bfd_error_handler
)
8191 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8192 input_bfd
, input_section
,
8193 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8194 return bfd_reloc_overflow
;
8197 /* Mask out the value and the ADD/SUB part of the opcode; take care
8198 not to destroy the S bit. */
8201 /* Set the opcode according to whether the value to go in the
8202 place is negative. */
8203 if (signed_value
< 0)
8208 /* Encode the offset. */
8211 bfd_put_32 (input_bfd
, insn
, hit_data
);
8213 return bfd_reloc_ok
;
8215 case R_ARM_LDR_PC_G0
:
8216 case R_ARM_LDR_PC_G1
:
8217 case R_ARM_LDR_PC_G2
:
8218 case R_ARM_LDR_SB_G0
:
8219 case R_ARM_LDR_SB_G1
:
8220 case R_ARM_LDR_SB_G2
:
8222 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8223 bfd_vma pc
= input_section
->output_section
->vma
8224 + input_section
->output_offset
+ rel
->r_offset
;
8225 bfd_vma sb
= 0; /* See note above. */
8227 bfd_signed_vma signed_value
;
8230 /* Determine which groups of bits to calculate. */
8233 case R_ARM_LDR_PC_G0
:
8234 case R_ARM_LDR_SB_G0
:
8238 case R_ARM_LDR_PC_G1
:
8239 case R_ARM_LDR_SB_G1
:
8243 case R_ARM_LDR_PC_G2
:
8244 case R_ARM_LDR_SB_G2
:
8252 /* If REL, extract the addend from the insn. If RELA, it will
8253 have already been fetched for us. */
8254 if (globals
->use_rel
)
8256 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8257 signed_addend
= negative
* (insn
& 0xfff);
8260 /* Compute the value (X) to go in the place. */
8261 if (r_type
== R_ARM_LDR_PC_G0
8262 || r_type
== R_ARM_LDR_PC_G1
8263 || r_type
== R_ARM_LDR_PC_G2
)
8265 signed_value
= value
- pc
+ signed_addend
;
8267 /* Section base relative. */
8268 signed_value
= value
- sb
+ signed_addend
;
8270 /* Calculate the value of the relevant G_{n-1} to obtain
8271 the residual at that stage. */
8272 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8274 /* Check for overflow. */
8275 if (residual
>= 0x1000)
8277 (*_bfd_error_handler
)
8278 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8279 input_bfd
, input_section
,
8280 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8281 return bfd_reloc_overflow
;
8284 /* Mask out the value and U bit. */
8287 /* Set the U bit if the value to go in the place is non-negative. */
8288 if (signed_value
>= 0)
8291 /* Encode the offset. */
8294 bfd_put_32 (input_bfd
, insn
, hit_data
);
8296 return bfd_reloc_ok
;
8298 case R_ARM_LDRS_PC_G0
:
8299 case R_ARM_LDRS_PC_G1
:
8300 case R_ARM_LDRS_PC_G2
:
8301 case R_ARM_LDRS_SB_G0
:
8302 case R_ARM_LDRS_SB_G1
:
8303 case R_ARM_LDRS_SB_G2
:
8305 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8306 bfd_vma pc
= input_section
->output_section
->vma
8307 + input_section
->output_offset
+ rel
->r_offset
;
8308 bfd_vma sb
= 0; /* See note above. */
8310 bfd_signed_vma signed_value
;
8313 /* Determine which groups of bits to calculate. */
8316 case R_ARM_LDRS_PC_G0
:
8317 case R_ARM_LDRS_SB_G0
:
8321 case R_ARM_LDRS_PC_G1
:
8322 case R_ARM_LDRS_SB_G1
:
8326 case R_ARM_LDRS_PC_G2
:
8327 case R_ARM_LDRS_SB_G2
:
8335 /* If REL, extract the addend from the insn. If RELA, it will
8336 have already been fetched for us. */
8337 if (globals
->use_rel
)
8339 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8340 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
8343 /* Compute the value (X) to go in the place. */
8344 if (r_type
== R_ARM_LDRS_PC_G0
8345 || r_type
== R_ARM_LDRS_PC_G1
8346 || r_type
== R_ARM_LDRS_PC_G2
)
8348 signed_value
= value
- pc
+ signed_addend
;
8350 /* Section base relative. */
8351 signed_value
= value
- sb
+ signed_addend
;
8353 /* Calculate the value of the relevant G_{n-1} to obtain
8354 the residual at that stage. */
8355 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8357 /* Check for overflow. */
8358 if (residual
>= 0x100)
8360 (*_bfd_error_handler
)
8361 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8362 input_bfd
, input_section
,
8363 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8364 return bfd_reloc_overflow
;
8367 /* Mask out the value and U bit. */
8370 /* Set the U bit if the value to go in the place is non-negative. */
8371 if (signed_value
>= 0)
8374 /* Encode the offset. */
8375 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
8377 bfd_put_32 (input_bfd
, insn
, hit_data
);
8379 return bfd_reloc_ok
;
8381 case R_ARM_LDC_PC_G0
:
8382 case R_ARM_LDC_PC_G1
:
8383 case R_ARM_LDC_PC_G2
:
8384 case R_ARM_LDC_SB_G0
:
8385 case R_ARM_LDC_SB_G1
:
8386 case R_ARM_LDC_SB_G2
:
8388 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8389 bfd_vma pc
= input_section
->output_section
->vma
8390 + input_section
->output_offset
+ rel
->r_offset
;
8391 bfd_vma sb
= 0; /* See note above. */
8393 bfd_signed_vma signed_value
;
8396 /* Determine which groups of bits to calculate. */
8399 case R_ARM_LDC_PC_G0
:
8400 case R_ARM_LDC_SB_G0
:
8404 case R_ARM_LDC_PC_G1
:
8405 case R_ARM_LDC_SB_G1
:
8409 case R_ARM_LDC_PC_G2
:
8410 case R_ARM_LDC_SB_G2
:
8418 /* If REL, extract the addend from the insn. If RELA, it will
8419 have already been fetched for us. */
8420 if (globals
->use_rel
)
8422 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8423 signed_addend
= negative
* ((insn
& 0xff) << 2);
8426 /* Compute the value (X) to go in the place. */
8427 if (r_type
== R_ARM_LDC_PC_G0
8428 || r_type
== R_ARM_LDC_PC_G1
8429 || r_type
== R_ARM_LDC_PC_G2
)
8431 signed_value
= value
- pc
+ signed_addend
;
8433 /* Section base relative. */
8434 signed_value
= value
- sb
+ signed_addend
;
8436 /* Calculate the value of the relevant G_{n-1} to obtain
8437 the residual at that stage. */
8438 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8440 /* Check for overflow. (The absolute value to go in the place must be
8441 divisible by four and, after having been divided by four, must
8442 fit in eight bits.) */
8443 if ((residual
& 0x3) != 0 || residual
>= 0x400)
8445 (*_bfd_error_handler
)
8446 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8447 input_bfd
, input_section
,
8448 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8449 return bfd_reloc_overflow
;
8452 /* Mask out the value and U bit. */
8455 /* Set the U bit if the value to go in the place is non-negative. */
8456 if (signed_value
>= 0)
8459 /* Encode the offset. */
8460 insn
|= residual
>> 2;
8462 bfd_put_32 (input_bfd
, insn
, hit_data
);
8464 return bfd_reloc_ok
;
8467 return bfd_reloc_notsupported
;
8471 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
8473 arm_add_to_rel (bfd
* abfd
,
8475 reloc_howto_type
* howto
,
8476 bfd_signed_vma increment
)
8478 bfd_signed_vma addend
;
8480 if (howto
->type
== R_ARM_THM_CALL
8481 || howto
->type
== R_ARM_THM_JUMP24
)
8483 int upper_insn
, lower_insn
;
8486 upper_insn
= bfd_get_16 (abfd
, address
);
8487 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
8488 upper
= upper_insn
& 0x7ff;
8489 lower
= lower_insn
& 0x7ff;
8491 addend
= (upper
<< 12) | (lower
<< 1);
8492 addend
+= increment
;
8495 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
8496 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
8498 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
8499 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
8505 contents
= bfd_get_32 (abfd
, address
);
8507 /* Get the (signed) value from the instruction. */
8508 addend
= contents
& howto
->src_mask
;
8509 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8511 bfd_signed_vma mask
;
8514 mask
&= ~ howto
->src_mask
;
8518 /* Add in the increment, (which is a byte value). */
8519 switch (howto
->type
)
8522 addend
+= increment
;
8529 addend
<<= howto
->size
;
8530 addend
+= increment
;
8532 /* Should we check for overflow here ? */
8534 /* Drop any undesired bits. */
8535 addend
>>= howto
->rightshift
;
8539 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
8541 bfd_put_32 (abfd
, contents
, address
);
8545 #define IS_ARM_TLS_RELOC(R_TYPE) \
8546 ((R_TYPE) == R_ARM_TLS_GD32 \
8547 || (R_TYPE) == R_ARM_TLS_LDO32 \
8548 || (R_TYPE) == R_ARM_TLS_LDM32 \
8549 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
8550 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
8551 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
8552 || (R_TYPE) == R_ARM_TLS_LE32 \
8553 || (R_TYPE) == R_ARM_TLS_IE32)
8555 /* Relocate an ARM ELF section. */
8558 elf32_arm_relocate_section (bfd
* output_bfd
,
8559 struct bfd_link_info
* info
,
8561 asection
* input_section
,
8562 bfd_byte
* contents
,
8563 Elf_Internal_Rela
* relocs
,
8564 Elf_Internal_Sym
* local_syms
,
8565 asection
** local_sections
)
8567 Elf_Internal_Shdr
*symtab_hdr
;
8568 struct elf_link_hash_entry
**sym_hashes
;
8569 Elf_Internal_Rela
*rel
;
8570 Elf_Internal_Rela
*relend
;
8572 struct elf32_arm_link_hash_table
* globals
;
8574 globals
= elf32_arm_hash_table (info
);
8576 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
8577 sym_hashes
= elf_sym_hashes (input_bfd
);
8580 relend
= relocs
+ input_section
->reloc_count
;
8581 for (; rel
< relend
; rel
++)
8584 reloc_howto_type
* howto
;
8585 unsigned long r_symndx
;
8586 Elf_Internal_Sym
* sym
;
8588 struct elf_link_hash_entry
* h
;
8590 bfd_reloc_status_type r
;
8593 bfd_boolean unresolved_reloc
= FALSE
;
8594 char *error_message
= NULL
;
8596 r_symndx
= ELF32_R_SYM (rel
->r_info
);
8597 r_type
= ELF32_R_TYPE (rel
->r_info
);
8598 r_type
= arm_real_reloc_type (globals
, r_type
);
8600 if ( r_type
== R_ARM_GNU_VTENTRY
8601 || r_type
== R_ARM_GNU_VTINHERIT
)
8604 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
8605 howto
= bfd_reloc
.howto
;
8611 if (r_symndx
< symtab_hdr
->sh_info
)
8613 sym
= local_syms
+ r_symndx
;
8614 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
8615 sec
= local_sections
[r_symndx
];
8616 if (globals
->use_rel
)
8618 relocation
= (sec
->output_section
->vma
8619 + sec
->output_offset
8621 if (!info
->relocatable
8622 && (sec
->flags
& SEC_MERGE
)
8623 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
8626 bfd_vma addend
, value
;
8630 case R_ARM_MOVW_ABS_NC
:
8631 case R_ARM_MOVT_ABS
:
8632 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
8633 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
8634 addend
= (addend
^ 0x8000) - 0x8000;
8637 case R_ARM_THM_MOVW_ABS_NC
:
8638 case R_ARM_THM_MOVT_ABS
:
8639 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
8641 value
|= bfd_get_16 (input_bfd
,
8642 contents
+ rel
->r_offset
+ 2);
8643 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
8644 | ((value
& 0x04000000) >> 15);
8645 addend
= (addend
^ 0x8000) - 0x8000;
8649 if (howto
->rightshift
8650 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
8652 (*_bfd_error_handler
)
8653 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
8654 input_bfd
, input_section
,
8655 (long) rel
->r_offset
, howto
->name
);
8659 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
8661 /* Get the (signed) value from the instruction. */
8662 addend
= value
& howto
->src_mask
;
8663 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8665 bfd_signed_vma mask
;
8668 mask
&= ~ howto
->src_mask
;
8676 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
8678 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
8680 /* Cases here must match those in the preceeding
8681 switch statement. */
8684 case R_ARM_MOVW_ABS_NC
:
8685 case R_ARM_MOVT_ABS
:
8686 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
8688 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
8691 case R_ARM_THM_MOVW_ABS_NC
:
8692 case R_ARM_THM_MOVT_ABS
:
8693 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
8694 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
8695 bfd_put_16 (input_bfd
, value
>> 16,
8696 contents
+ rel
->r_offset
);
8697 bfd_put_16 (input_bfd
, value
,
8698 contents
+ rel
->r_offset
+ 2);
8702 value
= (value
& ~ howto
->dst_mask
)
8703 | (addend
& howto
->dst_mask
);
8704 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
8710 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
8716 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
8717 r_symndx
, symtab_hdr
, sym_hashes
,
8719 unresolved_reloc
, warned
);
8724 if (sec
!= NULL
&& elf_discarded_section (sec
))
8726 /* For relocs against symbols from removed linkonce sections,
8727 or sections discarded by a linker script, we just want the
8728 section contents zeroed. Avoid any special processing. */
8729 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
8735 if (info
->relocatable
)
8737 /* This is a relocatable link. We don't have to change
8738 anything, unless the reloc is against a section symbol,
8739 in which case we have to adjust according to where the
8740 section symbol winds up in the output section. */
8741 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
8743 if (globals
->use_rel
)
8744 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
8745 howto
, (bfd_signed_vma
) sec
->output_offset
);
8747 rel
->r_addend
+= sec
->output_offset
;
8753 name
= h
->root
.root
.string
;
8756 name
= (bfd_elf_string_from_elf_section
8757 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
8758 if (name
== NULL
|| *name
== '\0')
8759 name
= bfd_section_name (input_bfd
, sec
);
8763 && r_type
!= R_ARM_NONE
8765 || h
->root
.type
== bfd_link_hash_defined
8766 || h
->root
.type
== bfd_link_hash_defweak
)
8767 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
8769 (*_bfd_error_handler
)
8770 ((sym_type
== STT_TLS
8771 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
8772 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
8775 (long) rel
->r_offset
,
8780 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
8781 input_section
, contents
, rel
,
8782 relocation
, info
, sec
, name
,
8783 (h
? ELF_ST_TYPE (h
->type
) :
8784 ELF_ST_TYPE (sym
->st_info
)), h
,
8785 &unresolved_reloc
, &error_message
);
8787 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8788 because such sections are not SEC_ALLOC and thus ld.so will
8789 not process them. */
8790 if (unresolved_reloc
8791 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
8794 (*_bfd_error_handler
)
8795 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8798 (long) rel
->r_offset
,
8800 h
->root
.root
.string
);
8804 if (r
!= bfd_reloc_ok
)
8808 case bfd_reloc_overflow
:
8809 /* If the overflowing reloc was to an undefined symbol,
8810 we have already printed one error message and there
8811 is no point complaining again. */
8813 h
->root
.type
!= bfd_link_hash_undefined
)
8814 && (!((*info
->callbacks
->reloc_overflow
)
8815 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
8816 (bfd_vma
) 0, input_bfd
, input_section
,
8821 case bfd_reloc_undefined
:
8822 if (!((*info
->callbacks
->undefined_symbol
)
8823 (info
, name
, input_bfd
, input_section
,
8824 rel
->r_offset
, TRUE
)))
8828 case bfd_reloc_outofrange
:
8829 error_message
= _("out of range");
8832 case bfd_reloc_notsupported
:
8833 error_message
= _("unsupported relocation");
8836 case bfd_reloc_dangerous
:
8837 /* error_message should already be set. */
8841 error_message
= _("unknown error");
8845 BFD_ASSERT (error_message
!= NULL
);
8846 if (!((*info
->callbacks
->reloc_dangerous
)
8847 (info
, error_message
, input_bfd
, input_section
,
8858 /* Add a new unwind edit to the list described by HEAD, TAIL. If INDEX is zero,
8859 adds the edit to the start of the list. (The list must be built in order of
8860 ascending INDEX: the function's callers are primarily responsible for
8861 maintaining that condition). */
8864 add_unwind_table_edit (arm_unwind_table_edit
**head
,
8865 arm_unwind_table_edit
**tail
,
8866 arm_unwind_edit_type type
,
8867 asection
*linked_section
,
8870 arm_unwind_table_edit
*new_edit
= xmalloc (sizeof (arm_unwind_table_edit
));
8872 new_edit
->type
= type
;
8873 new_edit
->linked_section
= linked_section
;
8874 new_edit
->index
= index
;
8878 new_edit
->next
= NULL
;
8881 (*tail
)->next
= new_edit
;
8890 new_edit
->next
= *head
;
8899 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
8901 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
8903 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
8907 if (!exidx_sec
->rawsize
)
8908 exidx_sec
->rawsize
= exidx_sec
->size
;
8910 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
8911 out_sec
= exidx_sec
->output_section
;
8912 /* Adjust size of output section. */
8913 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
8916 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
8918 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
8920 struct _arm_elf_section_data
*exidx_arm_data
;
8922 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
8923 add_unwind_table_edit (
8924 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
8925 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
8926 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
8928 adjust_exidx_size(exidx_sec
, 8);
8931 /* Scan .ARM.exidx tables, and create a list describing edits which should be
8932 made to those tables, such that:
8934 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
8935 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
8936 codes which have been inlined into the index).
8938 The edits are applied when the tables are written
8939 (in elf32_arm_write_section).
8943 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
8944 unsigned int num_text_sections
,
8945 struct bfd_link_info
*info
)
8948 unsigned int last_second_word
= 0, i
;
8949 asection
*last_exidx_sec
= NULL
;
8950 asection
*last_text_sec
= NULL
;
8951 int last_unwind_type
= -1;
8953 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
8955 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link_next
)
8959 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
8961 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
8962 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
8964 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
8967 if (elf_sec
->linked_to
)
8969 Elf_Internal_Shdr
*linked_hdr
8970 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
8971 struct _arm_elf_section_data
*linked_sec_arm_data
8972 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
8974 if (linked_sec_arm_data
== NULL
)
8977 /* Link this .ARM.exidx section back from the text section it
8979 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
8984 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
8985 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
8986 and add EXIDX_CANTUNWIND entries for sections with no unwind table data.
8989 for (i
= 0; i
< num_text_sections
; i
++)
8991 asection
*sec
= text_section_order
[i
];
8992 asection
*exidx_sec
;
8993 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
8994 struct _arm_elf_section_data
*exidx_arm_data
;
8995 bfd_byte
*contents
= NULL
;
8996 int deleted_exidx_bytes
= 0;
8998 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
8999 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
9000 Elf_Internal_Shdr
*hdr
;
9003 if (arm_data
== NULL
)
9006 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
9007 if (exidx_sec
== NULL
)
9009 /* Section has no unwind data. */
9010 if (last_unwind_type
== 0 || !last_exidx_sec
)
9013 /* Ignore zero sized sections. */
9017 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
9018 last_unwind_type
= 0;
9022 /* Skip /DISCARD/ sections. */
9023 if (bfd_is_abs_section (exidx_sec
->output_section
))
9026 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
9027 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
9030 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
9031 if (exidx_arm_data
== NULL
)
9034 ibfd
= exidx_sec
->owner
;
9036 if (hdr
->contents
!= NULL
)
9037 contents
= hdr
->contents
;
9038 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
9042 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
9044 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
9048 /* An EXIDX_CANTUNWIND entry. */
9049 if (second_word
== 1)
9051 if (last_unwind_type
== 0)
9055 /* Inlined unwinding data. Merge if equal to previous. */
9056 else if ((second_word
& 0x80000000) != 0)
9058 if (last_second_word
== second_word
&& last_unwind_type
== 1)
9061 last_second_word
= second_word
;
9063 /* Normal table entry. In theory we could merge these too,
9064 but duplicate entries are likely to be much less common. */
9070 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
9071 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
9073 deleted_exidx_bytes
+= 8;
9076 last_unwind_type
= unwind_type
;
9079 /* Free contents if we allocated it ourselves. */
9080 if (contents
!= hdr
->contents
)
9083 /* Record edits to be applied later (in elf32_arm_write_section). */
9084 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
9085 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
9087 if (deleted_exidx_bytes
> 0)
9088 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
9090 last_exidx_sec
= exidx_sec
;
9091 last_text_sec
= sec
;
9094 /* Add terminating CANTUNWIND entry. */
9095 if (last_exidx_sec
&& last_unwind_type
!= 0)
9096 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
9102 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
9103 bfd
*ibfd
, const char *name
)
9105 asection
*sec
, *osec
;
9107 sec
= bfd_get_section_by_name (ibfd
, name
);
9108 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
9111 osec
= sec
->output_section
;
9112 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
9115 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
9116 sec
->output_offset
, sec
->size
))
9123 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
9125 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
9127 /* Invoke the regular ELF backend linker to do all the work. */
9128 if (!bfd_elf_final_link (abfd
, info
))
9131 /* Write out any glue sections now that we have created all the
9133 if (globals
->bfd_of_glue_owner
!= NULL
)
9135 if (! elf32_arm_output_glue_section (info
, abfd
,
9136 globals
->bfd_of_glue_owner
,
9137 ARM2THUMB_GLUE_SECTION_NAME
))
9140 if (! elf32_arm_output_glue_section (info
, abfd
,
9141 globals
->bfd_of_glue_owner
,
9142 THUMB2ARM_GLUE_SECTION_NAME
))
9145 if (! elf32_arm_output_glue_section (info
, abfd
,
9146 globals
->bfd_of_glue_owner
,
9147 VFP11_ERRATUM_VENEER_SECTION_NAME
))
9150 if (! elf32_arm_output_glue_section (info
, abfd
,
9151 globals
->bfd_of_glue_owner
,
9152 ARM_BX_GLUE_SECTION_NAME
))
9159 /* Set the right machine number. */
9162 elf32_arm_object_p (bfd
*abfd
)
9166 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
9168 if (mach
!= bfd_mach_arm_unknown
)
9169 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
9171 else if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
9172 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, bfd_mach_arm_ep9312
);
9175 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
9180 /* Function to keep ARM specific flags in the ELF header. */
9183 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
9185 if (elf_flags_init (abfd
)
9186 && elf_elfheader (abfd
)->e_flags
!= flags
)
9188 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
9190 if (flags
& EF_ARM_INTERWORK
)
9191 (*_bfd_error_handler
)
9192 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
9196 (_("Warning: Clearing the interworking flag of %B due to outside request"),
9202 elf_elfheader (abfd
)->e_flags
= flags
;
9203 elf_flags_init (abfd
) = TRUE
;
9209 /* Copy backend specific data from one object module to another. */
9212 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
9217 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
9220 in_flags
= elf_elfheader (ibfd
)->e_flags
;
9221 out_flags
= elf_elfheader (obfd
)->e_flags
;
9223 if (elf_flags_init (obfd
)
9224 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
9225 && in_flags
!= out_flags
)
9227 /* Cannot mix APCS26 and APCS32 code. */
9228 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
9231 /* Cannot mix float APCS and non-float APCS code. */
9232 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
9235 /* If the src and dest have different interworking flags
9236 then turn off the interworking bit. */
9237 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
9239 if (out_flags
& EF_ARM_INTERWORK
)
9241 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
9244 in_flags
&= ~EF_ARM_INTERWORK
;
9247 /* Likewise for PIC, though don't warn for this case. */
9248 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
9249 in_flags
&= ~EF_ARM_PIC
;
9252 elf_elfheader (obfd
)->e_flags
= in_flags
;
9253 elf_flags_init (obfd
) = TRUE
;
9255 /* Also copy the EI_OSABI field. */
9256 elf_elfheader (obfd
)->e_ident
[EI_OSABI
] =
9257 elf_elfheader (ibfd
)->e_ident
[EI_OSABI
];
9259 /* Copy object attributes. */
9260 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
9265 /* Values for Tag_ABI_PCS_R9_use. */
9274 /* Values for Tag_ABI_PCS_RW_data. */
9277 AEABI_PCS_RW_data_absolute
,
9278 AEABI_PCS_RW_data_PCrel
,
9279 AEABI_PCS_RW_data_SBrel
,
9280 AEABI_PCS_RW_data_unused
9283 /* Values for Tag_ABI_enum_size. */
9289 AEABI_enum_forced_wide
9292 /* Determine whether an object attribute tag takes an integer, a
9296 elf32_arm_obj_attrs_arg_type (int tag
)
9298 if (tag
== Tag_compatibility
)
9299 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
9300 else if (tag
== Tag_nodefaults
)
9301 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
9302 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
9303 return ATTR_TYPE_FLAG_STR_VAL
;
9305 return ATTR_TYPE_FLAG_INT_VAL
;
9307 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
9310 /* The ABI defines that Tag_conformance should be emitted first, and that
9311 Tag_nodefaults should be second (if either is defined). This sets those
9312 two positions, and bumps up the position of all the remaining tags to
9315 elf32_arm_obj_attrs_order (int num
)
9318 return Tag_conformance
;
9320 return Tag_nodefaults
;
9321 if ((num
- 2) < Tag_nodefaults
)
9323 if ((num
- 1) < Tag_conformance
)
9328 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
9329 Returns -1 if no architecture could be read. */
9332 get_secondary_compatible_arch (bfd
*abfd
)
9334 obj_attribute
*attr
=
9335 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
9337 /* Note: the tag and its argument below are uleb128 values, though
9338 currently-defined values fit in one byte for each. */
9340 && attr
->s
[0] == Tag_CPU_arch
9341 && (attr
->s
[1] & 128) != 128
9345 /* This tag is "safely ignorable", so don't complain if it looks funny. */
9349 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
9350 The tag is removed if ARCH is -1. */
9353 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
9355 obj_attribute
*attr
=
9356 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
9364 /* Note: the tag and its argument below are uleb128 values, though
9365 currently-defined values fit in one byte for each. */
9367 attr
->s
= bfd_alloc (abfd
, 3);
9368 attr
->s
[0] = Tag_CPU_arch
;
9373 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
9377 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
9378 int newtag
, int secondary_compat
)
9380 #define T(X) TAG_CPU_ARCH_##X
9381 int tagl
, tagh
, result
;
9384 T(V6T2
), /* PRE_V4. */
9388 T(V6T2
), /* V5TE. */
9389 T(V6T2
), /* V5TEJ. */
9396 T(V6K
), /* PRE_V4. */
9401 T(V6K
), /* V5TEJ. */
9403 T(V6KZ
), /* V6KZ. */
9409 T(V7
), /* PRE_V4. */
9428 T(V6K
), /* V5TEJ. */
9430 T(V6KZ
), /* V6KZ. */
9443 T(V6K
), /* V5TEJ. */
9445 T(V6KZ
), /* V6KZ. */
9449 T(V6S_M
), /* V6_M. */
9450 T(V6S_M
) /* V6S_M. */
9452 const int v4t_plus_v6_m
[] =
9458 T(V5TE
), /* V5TE. */
9459 T(V5TEJ
), /* V5TEJ. */
9461 T(V6KZ
), /* V6KZ. */
9462 T(V6T2
), /* V6T2. */
9465 T(V6_M
), /* V6_M. */
9466 T(V6S_M
), /* V6S_M. */
9467 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
9476 /* Pseudo-architecture. */
9480 /* Check we've not got a higher architecture than we know about. */
9482 if (oldtag
>= MAX_TAG_CPU_ARCH
|| newtag
>= MAX_TAG_CPU_ARCH
)
9484 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
9488 /* Override old tag if we have a Tag_also_compatible_with on the output. */
9490 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
9491 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
9492 oldtag
= T(V4T_PLUS_V6_M
);
9494 /* And override the new tag if we have a Tag_also_compatible_with on the
9497 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
9498 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
9499 newtag
= T(V4T_PLUS_V6_M
);
9501 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
9502 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
9504 /* Architectures before V6KZ add features monotonically. */
9505 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
9508 result
= comb
[tagh
- T(V6T2
)][tagl
];
9510 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
9511 as the canonical version. */
9512 if (result
== T(V4T_PLUS_V6_M
))
9515 *secondary_compat_out
= T(V6_M
);
9518 *secondary_compat_out
= -1;
9522 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
9523 ibfd
, oldtag
, newtag
);
9531 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
9532 are conflicting attributes. */
9535 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, bfd
*obfd
)
9537 obj_attribute
*in_attr
;
9538 obj_attribute
*out_attr
;
9539 obj_attribute_list
*in_list
;
9540 obj_attribute_list
*out_list
;
9541 obj_attribute_list
**out_listp
;
9542 /* Some tags have 0 = don't care, 1 = strong requirement,
9543 2 = weak requirement. */
9544 static const int order_021
[3] = {0, 2, 1};
9545 /* For use with Tag_VFP_arch. */
9546 static const int order_01243
[5] = {0, 1, 2, 4, 3};
9548 bfd_boolean result
= TRUE
;
9550 /* Skip the linker stubs file. This preserves previous behavior
9551 of accepting unknown attributes in the first input file - but
9553 if (ibfd
->flags
& BFD_LINKER_CREATED
)
9556 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
9558 /* This is the first object. Copy the attributes. */
9559 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
9561 /* Use the Tag_null value to indicate the attributes have been
9563 elf_known_obj_attributes_proc (obfd
)[0].i
= 1;
9568 in_attr
= elf_known_obj_attributes_proc (ibfd
);
9569 out_attr
= elf_known_obj_attributes_proc (obfd
);
9570 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
9571 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
9573 /* Ignore mismatches if the object doesn't use floating point. */
9574 if (out_attr
[Tag_ABI_FP_number_model
].i
== 0)
9575 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
9576 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= 0)
9579 (_("error: %B uses VFP register arguments, %B does not"),
9585 for (i
= 4; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
9587 /* Merge this attribute with existing attributes. */
9590 case Tag_CPU_raw_name
:
9592 /* These are merged after Tag_CPU_arch. */
9595 case Tag_ABI_optimization_goals
:
9596 case Tag_ABI_FP_optimization_goals
:
9597 /* Use the first value seen. */
9602 int secondary_compat
= -1, secondary_compat_out
= -1;
9603 unsigned int saved_out_attr
= out_attr
[i
].i
;
9604 static const char *name_table
[] = {
9605 /* These aren't real CPU names, but we can't guess
9606 that from the architecture version alone. */
9622 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
9623 secondary_compat
= get_secondary_compatible_arch (ibfd
);
9624 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
9625 out_attr
[i
].i
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
9626 &secondary_compat_out
,
9629 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
9631 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
9632 if (out_attr
[i
].i
== saved_out_attr
)
9633 ; /* Leave the names alone. */
9634 else if (out_attr
[i
].i
== in_attr
[i
].i
)
9636 /* The output architecture has been changed to match the
9637 input architecture. Use the input names. */
9638 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
9639 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
9641 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
9642 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
9647 out_attr
[Tag_CPU_name
].s
= NULL
;
9648 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
9651 /* If we still don't have a value for Tag_CPU_name,
9652 make one up now. Tag_CPU_raw_name remains blank. */
9653 if (out_attr
[Tag_CPU_name
].s
== NULL
9654 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
9655 out_attr
[Tag_CPU_name
].s
=
9656 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
9660 case Tag_ARM_ISA_use
:
9661 case Tag_THUMB_ISA_use
:
9663 case Tag_Advanced_SIMD_arch
:
9664 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
9665 case Tag_ABI_FP_rounding
:
9666 case Tag_ABI_FP_exceptions
:
9667 case Tag_ABI_FP_user_exceptions
:
9668 case Tag_ABI_FP_number_model
:
9669 case Tag_VFP_HP_extension
:
9670 case Tag_CPU_unaligned_access
:
9672 case Tag_Virtualization_use
:
9673 case Tag_MPextension_use
:
9674 /* Use the largest value specified. */
9675 if (in_attr
[i
].i
> out_attr
[i
].i
)
9676 out_attr
[i
].i
= in_attr
[i
].i
;
9679 case Tag_ABI_align8_preserved
:
9680 case Tag_ABI_PCS_RO_data
:
9681 /* Use the smallest value specified. */
9682 if (in_attr
[i
].i
< out_attr
[i
].i
)
9683 out_attr
[i
].i
= in_attr
[i
].i
;
9686 case Tag_ABI_align8_needed
:
9687 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
9688 && (in_attr
[Tag_ABI_align8_preserved
].i
== 0
9689 || out_attr
[Tag_ABI_align8_preserved
].i
== 0))
9691 /* This error message should be enabled once all non-conformant
9692 binaries in the toolchain have had the attributes set
9695 (_("error: %B: 8-byte data alignment conflicts with %B"),
9700 case Tag_ABI_FP_denormal
:
9701 case Tag_ABI_PCS_GOT_use
:
9702 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
9703 value if greater than 2 (for future-proofing). */
9704 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
9705 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
9706 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
9707 out_attr
[i
].i
= in_attr
[i
].i
;
9711 case Tag_CPU_arch_profile
:
9712 if (out_attr
[i
].i
!= in_attr
[i
].i
)
9714 /* 0 will merge with anything.
9715 'A' and 'S' merge to 'A'.
9716 'R' and 'S' merge to 'R'.
9717 'M' and 'A|R|S' is an error. */
9718 if (out_attr
[i
].i
== 0
9719 || (out_attr
[i
].i
== 'S'
9720 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
9721 out_attr
[i
].i
= in_attr
[i
].i
;
9722 else if (in_attr
[i
].i
== 0
9723 || (in_attr
[i
].i
== 'S'
9724 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
9729 (_("error: %B: Conflicting architecture profiles %c/%c"),
9731 in_attr
[i
].i
? in_attr
[i
].i
: '0',
9732 out_attr
[i
].i
? out_attr
[i
].i
: '0');
9738 /* Use the "greatest" from the sequence 0, 1, 2, 4, 3, or the
9739 largest value if greater than 4 (for future-proofing). */
9740 if ((in_attr
[i
].i
> 4 && in_attr
[i
].i
> out_attr
[i
].i
)
9741 || (in_attr
[i
].i
<= 4 && out_attr
[i
].i
<= 4
9742 && order_01243
[in_attr
[i
].i
] > order_01243
[out_attr
[i
].i
]))
9743 out_attr
[i
].i
= in_attr
[i
].i
;
9745 case Tag_PCS_config
:
9746 if (out_attr
[i
].i
== 0)
9747 out_attr
[i
].i
= in_attr
[i
].i
;
9748 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
9750 /* It's sometimes ok to mix different configs, so this is only
9753 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
9756 case Tag_ABI_PCS_R9_use
:
9757 if (in_attr
[i
].i
!= out_attr
[i
].i
9758 && out_attr
[i
].i
!= AEABI_R9_unused
9759 && in_attr
[i
].i
!= AEABI_R9_unused
)
9762 (_("error: %B: Conflicting use of R9"), ibfd
);
9765 if (out_attr
[i
].i
== AEABI_R9_unused
)
9766 out_attr
[i
].i
= in_attr
[i
].i
;
9768 case Tag_ABI_PCS_RW_data
:
9769 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
9770 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
9771 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
9774 (_("error: %B: SB relative addressing conflicts with use of R9"),
9778 /* Use the smallest value specified. */
9779 if (in_attr
[i
].i
< out_attr
[i
].i
)
9780 out_attr
[i
].i
= in_attr
[i
].i
;
9782 case Tag_ABI_PCS_wchar_t
:
9783 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
9784 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
9787 (_("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"),
9788 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
9790 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
9791 out_attr
[i
].i
= in_attr
[i
].i
;
9793 case Tag_ABI_enum_size
:
9794 if (in_attr
[i
].i
!= AEABI_enum_unused
)
9796 if (out_attr
[i
].i
== AEABI_enum_unused
9797 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
9799 /* The existing object is compatible with anything.
9800 Use whatever requirements the new object has. */
9801 out_attr
[i
].i
= in_attr
[i
].i
;
9803 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
9804 && out_attr
[i
].i
!= in_attr
[i
].i
9805 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
9807 static const char *aeabi_enum_names
[] =
9808 { "", "variable-size", "32-bit", "" };
9809 const char *in_name
=
9810 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
9811 ? aeabi_enum_names
[in_attr
[i
].i
]
9813 const char *out_name
=
9814 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
9815 ? aeabi_enum_names
[out_attr
[i
].i
]
9818 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
9819 ibfd
, in_name
, out_name
);
9823 case Tag_ABI_VFP_args
:
9826 case Tag_ABI_WMMX_args
:
9827 if (in_attr
[i
].i
!= out_attr
[i
].i
)
9830 (_("error: %B uses iWMMXt register arguments, %B does not"),
9835 case Tag_compatibility
:
9836 /* Merged in target-independent code. */
9838 case Tag_ABI_HardFP_use
:
9839 /* 1 (SP) and 2 (DP) conflict, so combine to 3 (SP & DP). */
9840 if ((in_attr
[i
].i
== 1 && out_attr
[i
].i
== 2)
9841 || (in_attr
[i
].i
== 2 && out_attr
[i
].i
== 1))
9843 else if (in_attr
[i
].i
> out_attr
[i
].i
)
9844 out_attr
[i
].i
= in_attr
[i
].i
;
9846 case Tag_ABI_FP_16bit_format
:
9847 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
9849 if (in_attr
[i
].i
!= out_attr
[i
].i
)
9852 (_("error: fp16 format mismatch between %B and %B"),
9857 if (in_attr
[i
].i
!= 0)
9858 out_attr
[i
].i
= in_attr
[i
].i
;
9861 case Tag_nodefaults
:
9862 /* This tag is set if it exists, but the value is unused (and is
9863 typically zero). We don't actually need to do anything here -
9864 the merge happens automatically when the type flags are merged
9867 case Tag_also_compatible_with
:
9868 /* Already done in Tag_CPU_arch. */
9870 case Tag_conformance
:
9871 /* Keep the attribute if it matches. Throw it away otherwise.
9872 No attribute means no claim to conform. */
9873 if (!in_attr
[i
].s
|| !out_attr
[i
].s
9874 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
9875 out_attr
[i
].s
= NULL
;
9880 bfd
*err_bfd
= NULL
;
9882 /* The "known_obj_attributes" table does contain some undefined
9883 attributes. Ensure that there are unused. */
9884 if (out_attr
[i
].i
!= 0 || out_attr
[i
].s
!= NULL
)
9886 else if (in_attr
[i
].i
!= 0 || in_attr
[i
].s
!= NULL
)
9889 if (err_bfd
!= NULL
)
9891 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
9895 (_("%B: Unknown mandatory EABI object attribute %d"),
9897 bfd_set_error (bfd_error_bad_value
);
9903 (_("Warning: %B: Unknown EABI object attribute %d"),
9908 /* Only pass on attributes that match in both inputs. */
9909 if (in_attr
[i
].i
!= out_attr
[i
].i
9910 || in_attr
[i
].s
!= out_attr
[i
].s
9911 || (in_attr
[i
].s
!= NULL
&& out_attr
[i
].s
!= NULL
9912 && strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0))
9915 out_attr
[i
].s
= NULL
;
9920 /* If out_attr was copied from in_attr then it won't have a type yet. */
9921 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
9922 out_attr
[i
].type
= in_attr
[i
].type
;
9925 /* Merge Tag_compatibility attributes and any common GNU ones. */
9926 _bfd_elf_merge_object_attributes (ibfd
, obfd
);
9928 /* Check for any attributes not known on ARM. */
9929 in_list
= elf_other_obj_attributes_proc (ibfd
);
9930 out_listp
= &elf_other_obj_attributes_proc (obfd
);
9931 out_list
= *out_listp
;
9933 for (; in_list
|| out_list
; )
9935 bfd
*err_bfd
= NULL
;
9938 /* The tags for each list are in numerical order. */
9939 /* If the tags are equal, then merge. */
9940 if (out_list
&& (!in_list
|| in_list
->tag
> out_list
->tag
))
9942 /* This attribute only exists in obfd. We can't merge, and we don't
9943 know what the tag means, so delete it. */
9945 err_tag
= out_list
->tag
;
9946 *out_listp
= out_list
->next
;
9947 out_list
= *out_listp
;
9949 else if (in_list
&& (!out_list
|| in_list
->tag
< out_list
->tag
))
9951 /* This attribute only exists in ibfd. We can't merge, and we don't
9952 know what the tag means, so ignore it. */
9954 err_tag
= in_list
->tag
;
9955 in_list
= in_list
->next
;
9957 else /* The tags are equal. */
9959 /* As present, all attributes in the list are unknown, and
9960 therefore can't be merged meaningfully. */
9962 err_tag
= out_list
->tag
;
9964 /* Only pass on attributes that match in both inputs. */
9965 if (in_list
->attr
.i
!= out_list
->attr
.i
9966 || in_list
->attr
.s
!= out_list
->attr
.s
9967 || (in_list
->attr
.s
&& out_list
->attr
.s
9968 && strcmp (in_list
->attr
.s
, out_list
->attr
.s
) != 0))
9970 /* No match. Delete the attribute. */
9971 *out_listp
= out_list
->next
;
9972 out_list
= *out_listp
;
9976 /* Matched. Keep the attribute and move to the next. */
9977 out_list
= out_list
->next
;
9978 in_list
= in_list
->next
;
9984 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
9985 if ((err_tag
& 127) < 64)
9988 (_("%B: Unknown mandatory EABI object attribute %d"),
9990 bfd_set_error (bfd_error_bad_value
);
9996 (_("Warning: %B: Unknown EABI object attribute %d"),
10005 /* Return TRUE if the two EABI versions are incompatible. */
10008 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
10010 /* v4 and v5 are the same spec before and after it was released,
10011 so allow mixing them. */
10012 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
10013 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
10016 return (iver
== over
);
10019 /* Merge backend specific data from an object file to the output
10020 object file when linking. */
10023 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
10025 flagword out_flags
;
10027 bfd_boolean flags_compatible
= TRUE
;
10030 /* Check if we have the same endianess. */
10031 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
10034 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
10037 if (!elf32_arm_merge_eabi_attributes (ibfd
, obfd
))
10040 /* The input BFD must have had its flags initialised. */
10041 /* The following seems bogus to me -- The flags are initialized in
10042 the assembler but I don't think an elf_flags_init field is
10043 written into the object. */
10044 /* BFD_ASSERT (elf_flags_init (ibfd)); */
10046 in_flags
= elf_elfheader (ibfd
)->e_flags
;
10047 out_flags
= elf_elfheader (obfd
)->e_flags
;
10049 /* In theory there is no reason why we couldn't handle this. However
10050 in practice it isn't even close to working and there is no real
10051 reason to want it. */
10052 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
10053 && !(ibfd
->flags
& DYNAMIC
)
10054 && (in_flags
& EF_ARM_BE8
))
10056 _bfd_error_handler (_("error: %B is already in final BE8 format"),
10061 if (!elf_flags_init (obfd
))
10063 /* If the input is the default architecture and had the default
10064 flags then do not bother setting the flags for the output
10065 architecture, instead allow future merges to do this. If no
10066 future merges ever set these flags then they will retain their
10067 uninitialised values, which surprise surprise, correspond
10068 to the default values. */
10069 if (bfd_get_arch_info (ibfd
)->the_default
10070 && elf_elfheader (ibfd
)->e_flags
== 0)
10073 elf_flags_init (obfd
) = TRUE
;
10074 elf_elfheader (obfd
)->e_flags
= in_flags
;
10076 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
10077 && bfd_get_arch_info (obfd
)->the_default
)
10078 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
10083 /* Determine what should happen if the input ARM architecture
10084 does not match the output ARM architecture. */
10085 if (! bfd_arm_merge_machines (ibfd
, obfd
))
10088 /* Identical flags must be compatible. */
10089 if (in_flags
== out_flags
)
10092 /* Check to see if the input BFD actually contains any sections. If
10093 not, its flags may not have been initialised either, but it
10094 cannot actually cause any incompatiblity. Do not short-circuit
10095 dynamic objects; their section list may be emptied by
10096 elf_link_add_object_symbols.
10098 Also check to see if there are no code sections in the input.
10099 In this case there is no need to check for code specific flags.
10100 XXX - do we need to worry about floating-point format compatability
10101 in data sections ? */
10102 if (!(ibfd
->flags
& DYNAMIC
))
10104 bfd_boolean null_input_bfd
= TRUE
;
10105 bfd_boolean only_data_sections
= TRUE
;
10107 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
10109 /* Ignore synthetic glue sections. */
10110 if (strcmp (sec
->name
, ".glue_7")
10111 && strcmp (sec
->name
, ".glue_7t"))
10113 if ((bfd_get_section_flags (ibfd
, sec
)
10114 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
10115 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
10116 only_data_sections
= FALSE
;
10118 null_input_bfd
= FALSE
;
10123 if (null_input_bfd
|| only_data_sections
)
10127 /* Complain about various flag mismatches. */
10128 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
10129 EF_ARM_EABI_VERSION (out_flags
)))
10132 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
10134 (in_flags
& EF_ARM_EABIMASK
) >> 24,
10135 (out_flags
& EF_ARM_EABIMASK
) >> 24);
10139 /* Not sure what needs to be checked for EABI versions >= 1. */
10140 /* VxWorks libraries do not use these flags. */
10141 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
10142 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
10143 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
10145 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
10148 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
10150 in_flags
& EF_ARM_APCS_26
? 26 : 32,
10151 out_flags
& EF_ARM_APCS_26
? 26 : 32);
10152 flags_compatible
= FALSE
;
10155 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
10157 if (in_flags
& EF_ARM_APCS_FLOAT
)
10159 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
10163 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
10166 flags_compatible
= FALSE
;
10169 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
10171 if (in_flags
& EF_ARM_VFP_FLOAT
)
10173 (_("error: %B uses VFP instructions, whereas %B does not"),
10177 (_("error: %B uses FPA instructions, whereas %B does not"),
10180 flags_compatible
= FALSE
;
10183 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
10185 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
10187 (_("error: %B uses Maverick instructions, whereas %B does not"),
10191 (_("error: %B does not use Maverick instructions, whereas %B does"),
10194 flags_compatible
= FALSE
;
10197 #ifdef EF_ARM_SOFT_FLOAT
10198 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
10200 /* We can allow interworking between code that is VFP format
10201 layout, and uses either soft float or integer regs for
10202 passing floating point arguments and results. We already
10203 know that the APCS_FLOAT flags match; similarly for VFP
10205 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
10206 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
10208 if (in_flags
& EF_ARM_SOFT_FLOAT
)
10210 (_("error: %B uses software FP, whereas %B uses hardware FP"),
10214 (_("error: %B uses hardware FP, whereas %B uses software FP"),
10217 flags_compatible
= FALSE
;
10222 /* Interworking mismatch is only a warning. */
10223 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
10225 if (in_flags
& EF_ARM_INTERWORK
)
10228 (_("Warning: %B supports interworking, whereas %B does not"),
10234 (_("Warning: %B does not support interworking, whereas %B does"),
10240 return flags_compatible
;
10243 /* Display the flags field. */
10246 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
10248 FILE * file
= (FILE *) ptr
;
10249 unsigned long flags
;
10251 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
10253 /* Print normal ELF private data. */
10254 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
10256 flags
= elf_elfheader (abfd
)->e_flags
;
10257 /* Ignore init flag - it may not be set, despite the flags field
10258 containing valid data. */
10260 /* xgettext:c-format */
10261 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
10263 switch (EF_ARM_EABI_VERSION (flags
))
10265 case EF_ARM_EABI_UNKNOWN
:
10266 /* The following flag bits are GNU extensions and not part of the
10267 official ARM ELF extended ABI. Hence they are only decoded if
10268 the EABI version is not set. */
10269 if (flags
& EF_ARM_INTERWORK
)
10270 fprintf (file
, _(" [interworking enabled]"));
10272 if (flags
& EF_ARM_APCS_26
)
10273 fprintf (file
, " [APCS-26]");
10275 fprintf (file
, " [APCS-32]");
10277 if (flags
& EF_ARM_VFP_FLOAT
)
10278 fprintf (file
, _(" [VFP float format]"));
10279 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
10280 fprintf (file
, _(" [Maverick float format]"));
10282 fprintf (file
, _(" [FPA float format]"));
10284 if (flags
& EF_ARM_APCS_FLOAT
)
10285 fprintf (file
, _(" [floats passed in float registers]"));
10287 if (flags
& EF_ARM_PIC
)
10288 fprintf (file
, _(" [position independent]"));
10290 if (flags
& EF_ARM_NEW_ABI
)
10291 fprintf (file
, _(" [new ABI]"));
10293 if (flags
& EF_ARM_OLD_ABI
)
10294 fprintf (file
, _(" [old ABI]"));
10296 if (flags
& EF_ARM_SOFT_FLOAT
)
10297 fprintf (file
, _(" [software FP]"));
10299 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
10300 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
10301 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
10302 | EF_ARM_MAVERICK_FLOAT
);
10305 case EF_ARM_EABI_VER1
:
10306 fprintf (file
, _(" [Version1 EABI]"));
10308 if (flags
& EF_ARM_SYMSARESORTED
)
10309 fprintf (file
, _(" [sorted symbol table]"));
10311 fprintf (file
, _(" [unsorted symbol table]"));
10313 flags
&= ~ EF_ARM_SYMSARESORTED
;
10316 case EF_ARM_EABI_VER2
:
10317 fprintf (file
, _(" [Version2 EABI]"));
10319 if (flags
& EF_ARM_SYMSARESORTED
)
10320 fprintf (file
, _(" [sorted symbol table]"));
10322 fprintf (file
, _(" [unsorted symbol table]"));
10324 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
10325 fprintf (file
, _(" [dynamic symbols use segment index]"));
10327 if (flags
& EF_ARM_MAPSYMSFIRST
)
10328 fprintf (file
, _(" [mapping symbols precede others]"));
10330 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
10331 | EF_ARM_MAPSYMSFIRST
);
10334 case EF_ARM_EABI_VER3
:
10335 fprintf (file
, _(" [Version3 EABI]"));
10338 case EF_ARM_EABI_VER4
:
10339 fprintf (file
, _(" [Version4 EABI]"));
10342 case EF_ARM_EABI_VER5
:
10343 fprintf (file
, _(" [Version5 EABI]"));
10345 if (flags
& EF_ARM_BE8
)
10346 fprintf (file
, _(" [BE8]"));
10348 if (flags
& EF_ARM_LE8
)
10349 fprintf (file
, _(" [LE8]"));
10351 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
10355 fprintf (file
, _(" <EABI version unrecognised>"));
10359 flags
&= ~ EF_ARM_EABIMASK
;
10361 if (flags
& EF_ARM_RELEXEC
)
10362 fprintf (file
, _(" [relocatable executable]"));
10364 if (flags
& EF_ARM_HASENTRY
)
10365 fprintf (file
, _(" [has entry point]"));
10367 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
10370 fprintf (file
, _("<Unrecognised flag bits set>"));
10372 fputc ('\n', file
);
10378 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
10380 switch (ELF_ST_TYPE (elf_sym
->st_info
))
10382 case STT_ARM_TFUNC
:
10383 return ELF_ST_TYPE (elf_sym
->st_info
);
10385 case STT_ARM_16BIT
:
10386 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
10387 This allows us to distinguish between data used by Thumb instructions
10388 and non-data (which is probably code) inside Thumb regions of an
10390 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
10391 return ELF_ST_TYPE (elf_sym
->st_info
);
10402 elf32_arm_gc_mark_hook (asection
*sec
,
10403 struct bfd_link_info
*info
,
10404 Elf_Internal_Rela
*rel
,
10405 struct elf_link_hash_entry
*h
,
10406 Elf_Internal_Sym
*sym
)
10409 switch (ELF32_R_TYPE (rel
->r_info
))
10411 case R_ARM_GNU_VTINHERIT
:
10412 case R_ARM_GNU_VTENTRY
:
10416 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
10419 /* Update the got entry reference counts for the section being removed. */
10422 elf32_arm_gc_sweep_hook (bfd
* abfd
,
10423 struct bfd_link_info
* info
,
10425 const Elf_Internal_Rela
* relocs
)
10427 Elf_Internal_Shdr
*symtab_hdr
;
10428 struct elf_link_hash_entry
**sym_hashes
;
10429 bfd_signed_vma
*local_got_refcounts
;
10430 const Elf_Internal_Rela
*rel
, *relend
;
10431 struct elf32_arm_link_hash_table
* globals
;
10433 if (info
->relocatable
)
10436 globals
= elf32_arm_hash_table (info
);
10438 elf_section_data (sec
)->local_dynrel
= NULL
;
10440 symtab_hdr
= & elf_symtab_hdr (abfd
);
10441 sym_hashes
= elf_sym_hashes (abfd
);
10442 local_got_refcounts
= elf_local_got_refcounts (abfd
);
10444 check_use_blx (globals
);
10446 relend
= relocs
+ sec
->reloc_count
;
10447 for (rel
= relocs
; rel
< relend
; rel
++)
10449 unsigned long r_symndx
;
10450 struct elf_link_hash_entry
*h
= NULL
;
10453 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10454 if (r_symndx
>= symtab_hdr
->sh_info
)
10456 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
10457 while (h
->root
.type
== bfd_link_hash_indirect
10458 || h
->root
.type
== bfd_link_hash_warning
)
10459 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10462 r_type
= ELF32_R_TYPE (rel
->r_info
);
10463 r_type
= arm_real_reloc_type (globals
, r_type
);
10467 case R_ARM_GOT_PREL
:
10468 case R_ARM_TLS_GD32
:
10469 case R_ARM_TLS_IE32
:
10472 if (h
->got
.refcount
> 0)
10473 h
->got
.refcount
-= 1;
10475 else if (local_got_refcounts
!= NULL
)
10477 if (local_got_refcounts
[r_symndx
] > 0)
10478 local_got_refcounts
[r_symndx
] -= 1;
10482 case R_ARM_TLS_LDM32
:
10483 elf32_arm_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
10487 case R_ARM_ABS32_NOI
:
10489 case R_ARM_REL32_NOI
:
10495 case R_ARM_THM_CALL
:
10496 case R_ARM_THM_JUMP24
:
10497 case R_ARM_THM_JUMP19
:
10498 case R_ARM_MOVW_ABS_NC
:
10499 case R_ARM_MOVT_ABS
:
10500 case R_ARM_MOVW_PREL_NC
:
10501 case R_ARM_MOVT_PREL
:
10502 case R_ARM_THM_MOVW_ABS_NC
:
10503 case R_ARM_THM_MOVT_ABS
:
10504 case R_ARM_THM_MOVW_PREL_NC
:
10505 case R_ARM_THM_MOVT_PREL
:
10506 /* Should the interworking branches be here also? */
10510 struct elf32_arm_link_hash_entry
*eh
;
10511 struct elf32_arm_relocs_copied
**pp
;
10512 struct elf32_arm_relocs_copied
*p
;
10514 eh
= (struct elf32_arm_link_hash_entry
*) h
;
10516 if (h
->plt
.refcount
> 0)
10518 h
->plt
.refcount
-= 1;
10519 if (r_type
== R_ARM_THM_CALL
)
10520 eh
->plt_maybe_thumb_refcount
--;
10522 if (r_type
== R_ARM_THM_JUMP24
10523 || r_type
== R_ARM_THM_JUMP19
)
10524 eh
->plt_thumb_refcount
--;
10527 if (r_type
== R_ARM_ABS32
10528 || r_type
== R_ARM_REL32
10529 || r_type
== R_ARM_ABS32_NOI
10530 || r_type
== R_ARM_REL32_NOI
)
10532 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
;
10534 if (p
->section
== sec
)
10537 if (ELF32_R_TYPE (rel
->r_info
) == R_ARM_REL32
10538 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_REL32_NOI
)
10556 /* Look through the relocs for a section during the first phase. */
10559 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
10560 asection
*sec
, const Elf_Internal_Rela
*relocs
)
10562 Elf_Internal_Shdr
*symtab_hdr
;
10563 struct elf_link_hash_entry
**sym_hashes
;
10564 const Elf_Internal_Rela
*rel
;
10565 const Elf_Internal_Rela
*rel_end
;
10568 bfd_vma
*local_got_offsets
;
10569 struct elf32_arm_link_hash_table
*htab
;
10570 bfd_boolean needs_plt
;
10571 unsigned long nsyms
;
10573 if (info
->relocatable
)
10576 BFD_ASSERT (is_arm_elf (abfd
));
10578 htab
= elf32_arm_hash_table (info
);
10581 /* Create dynamic sections for relocatable executables so that we can
10582 copy relocations. */
10583 if (htab
->root
.is_relocatable_executable
10584 && ! htab
->root
.dynamic_sections_created
)
10586 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
10590 dynobj
= elf_hash_table (info
)->dynobj
;
10591 local_got_offsets
= elf_local_got_offsets (abfd
);
10593 symtab_hdr
= & elf_symtab_hdr (abfd
);
10594 sym_hashes
= elf_sym_hashes (abfd
);
10595 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
10597 rel_end
= relocs
+ sec
->reloc_count
;
10598 for (rel
= relocs
; rel
< rel_end
; rel
++)
10600 struct elf_link_hash_entry
*h
;
10601 struct elf32_arm_link_hash_entry
*eh
;
10602 unsigned long r_symndx
;
10605 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10606 r_type
= ELF32_R_TYPE (rel
->r_info
);
10607 r_type
= arm_real_reloc_type (htab
, r_type
);
10609 if (r_symndx
>= nsyms
10610 /* PR 9934: It is possible to have relocations that do not
10611 refer to symbols, thus it is also possible to have an
10612 object file containing relocations but no symbol table. */
10613 && (r_symndx
> 0 || nsyms
> 0))
10615 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
10620 if (nsyms
== 0 || r_symndx
< symtab_hdr
->sh_info
)
10624 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
10625 while (h
->root
.type
== bfd_link_hash_indirect
10626 || h
->root
.type
== bfd_link_hash_warning
)
10627 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10630 eh
= (struct elf32_arm_link_hash_entry
*) h
;
10635 case R_ARM_GOT_PREL
:
10636 case R_ARM_TLS_GD32
:
10637 case R_ARM_TLS_IE32
:
10638 /* This symbol requires a global offset table entry. */
10640 int tls_type
, old_tls_type
;
10644 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
10645 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
10646 default: tls_type
= GOT_NORMAL
; break;
10652 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
10656 bfd_signed_vma
*local_got_refcounts
;
10658 /* This is a global offset table entry for a local symbol. */
10659 local_got_refcounts
= elf_local_got_refcounts (abfd
);
10660 if (local_got_refcounts
== NULL
)
10662 bfd_size_type size
;
10664 size
= symtab_hdr
->sh_info
;
10665 size
*= (sizeof (bfd_signed_vma
) + sizeof (char));
10666 local_got_refcounts
= bfd_zalloc (abfd
, size
);
10667 if (local_got_refcounts
== NULL
)
10669 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
10670 elf32_arm_local_got_tls_type (abfd
)
10671 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
10673 local_got_refcounts
[r_symndx
] += 1;
10674 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
10677 /* We will already have issued an error message if there is a
10678 TLS / non-TLS mismatch, based on the symbol type. We don't
10679 support any linker relaxations. So just combine any TLS
10681 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
10682 && tls_type
!= GOT_NORMAL
)
10683 tls_type
|= old_tls_type
;
10685 if (old_tls_type
!= tls_type
)
10688 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
10690 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
10693 /* Fall through. */
10695 case R_ARM_TLS_LDM32
:
10696 if (r_type
== R_ARM_TLS_LDM32
)
10697 htab
->tls_ldm_got
.refcount
++;
10698 /* Fall through. */
10700 case R_ARM_GOTOFF32
:
10702 if (htab
->sgot
== NULL
)
10704 if (htab
->root
.dynobj
== NULL
)
10705 htab
->root
.dynobj
= abfd
;
10706 if (!create_got_section (htab
->root
.dynobj
, info
))
10712 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
10713 ldr __GOTT_INDEX__ offsets. */
10714 if (!htab
->vxworks_p
)
10716 /* Fall through. */
10723 case R_ARM_THM_CALL
:
10724 case R_ARM_THM_JUMP24
:
10725 case R_ARM_THM_JUMP19
:
10729 case R_ARM_MOVW_ABS_NC
:
10730 case R_ARM_MOVT_ABS
:
10731 case R_ARM_THM_MOVW_ABS_NC
:
10732 case R_ARM_THM_MOVT_ABS
:
10735 (*_bfd_error_handler
)
10736 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
10737 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
10738 (h
) ? h
->root
.root
.string
: "a local symbol");
10739 bfd_set_error (bfd_error_bad_value
);
10743 /* Fall through. */
10745 case R_ARM_ABS32_NOI
:
10747 case R_ARM_REL32_NOI
:
10748 case R_ARM_MOVW_PREL_NC
:
10749 case R_ARM_MOVT_PREL
:
10750 case R_ARM_THM_MOVW_PREL_NC
:
10751 case R_ARM_THM_MOVT_PREL
:
10755 /* Should the interworking branches be listed here? */
10758 /* If this reloc is in a read-only section, we might
10759 need a copy reloc. We can't check reliably at this
10760 stage whether the section is read-only, as input
10761 sections have not yet been mapped to output sections.
10762 Tentatively set the flag for now, and correct in
10763 adjust_dynamic_symbol. */
10765 h
->non_got_ref
= 1;
10767 /* We may need a .plt entry if the function this reloc
10768 refers to is in a different object. We can't tell for
10769 sure yet, because something later might force the
10774 /* If we create a PLT entry, this relocation will reference
10775 it, even if it's an ABS32 relocation. */
10776 h
->plt
.refcount
+= 1;
10778 /* It's too early to use htab->use_blx here, so we have to
10779 record possible blx references separately from
10780 relocs that definitely need a thumb stub. */
10782 if (r_type
== R_ARM_THM_CALL
)
10783 eh
->plt_maybe_thumb_refcount
+= 1;
10785 if (r_type
== R_ARM_THM_JUMP24
10786 || r_type
== R_ARM_THM_JUMP19
)
10787 eh
->plt_thumb_refcount
+= 1;
10790 /* If we are creating a shared library or relocatable executable,
10791 and this is a reloc against a global symbol, or a non PC
10792 relative reloc against a local symbol, then we need to copy
10793 the reloc into the shared library. However, if we are linking
10794 with -Bsymbolic, we do not need to copy a reloc against a
10795 global symbol which is defined in an object we are
10796 including in the link (i.e., DEF_REGULAR is set). At
10797 this point we have not seen all the input files, so it is
10798 possible that DEF_REGULAR is not set now but will be set
10799 later (it is never cleared). We account for that
10800 possibility below by storing information in the
10801 relocs_copied field of the hash table entry. */
10802 if ((info
->shared
|| htab
->root
.is_relocatable_executable
)
10803 && (sec
->flags
& SEC_ALLOC
) != 0
10804 && ((r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
)
10805 || (h
!= NULL
&& ! h
->needs_plt
10806 && (! info
->symbolic
|| ! h
->def_regular
))))
10808 struct elf32_arm_relocs_copied
*p
, **head
;
10810 /* When creating a shared object, we must copy these
10811 reloc types into the output file. We create a reloc
10812 section in dynobj and make room for this reloc. */
10813 if (sreloc
== NULL
)
10815 sreloc
= _bfd_elf_make_dynamic_reloc_section
10816 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
10818 if (sreloc
== NULL
)
10821 /* BPABI objects never have dynamic relocations mapped. */
10822 if (htab
->symbian_p
)
10826 flags
= bfd_get_section_flags (dynobj
, sreloc
);
10827 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
10828 bfd_set_section_flags (dynobj
, sreloc
, flags
);
10832 /* If this is a global symbol, we count the number of
10833 relocations we need for this symbol. */
10836 head
= &((struct elf32_arm_link_hash_entry
*) h
)->relocs_copied
;
10840 /* Track dynamic relocs needed for local syms too.
10841 We really need local syms available to do this
10842 easily. Oh well. */
10847 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
10852 vpp
= &elf_section_data (s
)->local_dynrel
;
10853 head
= (struct elf32_arm_relocs_copied
**) vpp
;
10857 if (p
== NULL
|| p
->section
!= sec
)
10859 bfd_size_type amt
= sizeof *p
;
10861 p
= bfd_alloc (htab
->root
.dynobj
, amt
);
10871 if (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
10877 /* This relocation describes the C++ object vtable hierarchy.
10878 Reconstruct it for later use during GC. */
10879 case R_ARM_GNU_VTINHERIT
:
10880 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
10884 /* This relocation describes which C++ vtable entries are actually
10885 used. Record for later use during GC. */
10886 case R_ARM_GNU_VTENTRY
:
10887 BFD_ASSERT (h
!= NULL
);
10889 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
10898 /* Unwinding tables are not referenced directly. This pass marks them as
10899 required if the corresponding code section is marked. */
10902 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
10903 elf_gc_mark_hook_fn gc_mark_hook
)
10906 Elf_Internal_Shdr
**elf_shdrp
;
10909 /* Marking EH data may cause additional code sections to be marked,
10910 requiring multiple passes. */
10915 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10919 if (! is_arm_elf (sub
))
10922 elf_shdrp
= elf_elfsections (sub
);
10923 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
10925 Elf_Internal_Shdr
*hdr
;
10927 hdr
= &elf_section_data (o
)->this_hdr
;
10928 if (hdr
->sh_type
== SHT_ARM_EXIDX
10930 && hdr
->sh_link
< elf_numsections (sub
)
10932 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
10935 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
10945 /* Treat mapping symbols as special target symbols. */
10948 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
10950 return bfd_is_arm_special_symbol_name (sym
->name
,
10951 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
10954 /* This is a copy of elf_find_function() from elf.c except that
10955 ARM mapping symbols are ignored when looking for function names
10956 and STT_ARM_TFUNC is considered to a function type. */
10959 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
10960 asection
* section
,
10961 asymbol
** symbols
,
10963 const char ** filename_ptr
,
10964 const char ** functionname_ptr
)
10966 const char * filename
= NULL
;
10967 asymbol
* func
= NULL
;
10968 bfd_vma low_func
= 0;
10971 for (p
= symbols
; *p
!= NULL
; p
++)
10973 elf_symbol_type
*q
;
10975 q
= (elf_symbol_type
*) *p
;
10977 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
10982 filename
= bfd_asymbol_name (&q
->symbol
);
10985 case STT_ARM_TFUNC
:
10987 /* Skip mapping symbols. */
10988 if ((q
->symbol
.flags
& BSF_LOCAL
)
10989 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
10990 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
10992 /* Fall through. */
10993 if (bfd_get_section (&q
->symbol
) == section
10994 && q
->symbol
.value
>= low_func
10995 && q
->symbol
.value
<= offset
)
10997 func
= (asymbol
*) q
;
10998 low_func
= q
->symbol
.value
;
11008 *filename_ptr
= filename
;
11009 if (functionname_ptr
)
11010 *functionname_ptr
= bfd_asymbol_name (func
);
11016 /* Find the nearest line to a particular section and offset, for error
11017 reporting. This code is a duplicate of the code in elf.c, except
11018 that it uses arm_elf_find_function. */
11021 elf32_arm_find_nearest_line (bfd
* abfd
,
11022 asection
* section
,
11023 asymbol
** symbols
,
11025 const char ** filename_ptr
,
11026 const char ** functionname_ptr
,
11027 unsigned int * line_ptr
)
11029 bfd_boolean found
= FALSE
;
11031 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
11033 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
11034 filename_ptr
, functionname_ptr
,
11036 & elf_tdata (abfd
)->dwarf2_find_line_info
))
11038 if (!*functionname_ptr
)
11039 arm_elf_find_function (abfd
, section
, symbols
, offset
,
11040 *filename_ptr
? NULL
: filename_ptr
,
11046 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
11047 & found
, filename_ptr
,
11048 functionname_ptr
, line_ptr
,
11049 & elf_tdata (abfd
)->line_info
))
11052 if (found
&& (*functionname_ptr
|| *line_ptr
))
11055 if (symbols
== NULL
)
11058 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
11059 filename_ptr
, functionname_ptr
))
11067 elf32_arm_find_inliner_info (bfd
* abfd
,
11068 const char ** filename_ptr
,
11069 const char ** functionname_ptr
,
11070 unsigned int * line_ptr
)
11073 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
11074 functionname_ptr
, line_ptr
,
11075 & elf_tdata (abfd
)->dwarf2_find_line_info
);
11079 /* Adjust a symbol defined by a dynamic object and referenced by a
11080 regular object. The current definition is in some section of the
11081 dynamic object, but we're not including those sections. We have to
11082 change the definition to something the rest of the link can
11086 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
11087 struct elf_link_hash_entry
* h
)
11091 struct elf32_arm_link_hash_entry
* eh
;
11092 struct elf32_arm_link_hash_table
*globals
;
11094 globals
= elf32_arm_hash_table (info
);
11095 dynobj
= elf_hash_table (info
)->dynobj
;
11097 /* Make sure we know what is going on here. */
11098 BFD_ASSERT (dynobj
!= NULL
11100 || h
->u
.weakdef
!= NULL
11103 && !h
->def_regular
)));
11105 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11107 /* If this is a function, put it in the procedure linkage table. We
11108 will fill in the contents of the procedure linkage table later,
11109 when we know the address of the .got section. */
11110 if (h
->type
== STT_FUNC
|| h
->type
== STT_ARM_TFUNC
11113 if (h
->plt
.refcount
<= 0
11114 || SYMBOL_CALLS_LOCAL (info
, h
)
11115 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
11116 && h
->root
.type
== bfd_link_hash_undefweak
))
11118 /* This case can occur if we saw a PLT32 reloc in an input
11119 file, but the symbol was never referred to by a dynamic
11120 object, or if all references were garbage collected. In
11121 such a case, we don't actually need to build a procedure
11122 linkage table, and we can just do a PC24 reloc instead. */
11123 h
->plt
.offset
= (bfd_vma
) -1;
11124 eh
->plt_thumb_refcount
= 0;
11125 eh
->plt_maybe_thumb_refcount
= 0;
11133 /* It's possible that we incorrectly decided a .plt reloc was
11134 needed for an R_ARM_PC24 or similar reloc to a non-function sym
11135 in check_relocs. We can't decide accurately between function
11136 and non-function syms in check-relocs; Objects loaded later in
11137 the link may change h->type. So fix it now. */
11138 h
->plt
.offset
= (bfd_vma
) -1;
11139 eh
->plt_thumb_refcount
= 0;
11140 eh
->plt_maybe_thumb_refcount
= 0;
11143 /* If this is a weak symbol, and there is a real definition, the
11144 processor independent code will have arranged for us to see the
11145 real definition first, and we can just use the same value. */
11146 if (h
->u
.weakdef
!= NULL
)
11148 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
11149 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
11150 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
11151 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
11155 /* If there are no non-GOT references, we do not need a copy
11157 if (!h
->non_got_ref
)
11160 /* This is a reference to a symbol defined by a dynamic object which
11161 is not a function. */
11163 /* If we are creating a shared library, we must presume that the
11164 only references to the symbol are via the global offset table.
11165 For such cases we need not do anything here; the relocations will
11166 be handled correctly by relocate_section. Relocatable executables
11167 can reference data in shared objects directly, so we don't need to
11168 do anything here. */
11169 if (info
->shared
|| globals
->root
.is_relocatable_executable
)
11174 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
11175 h
->root
.root
.string
);
11179 /* We must allocate the symbol in our .dynbss section, which will
11180 become part of the .bss section of the executable. There will be
11181 an entry for this symbol in the .dynsym section. The dynamic
11182 object will contain position independent code, so all references
11183 from the dynamic object to this symbol will go through the global
11184 offset table. The dynamic linker will use the .dynsym entry to
11185 determine the address it must put in the global offset table, so
11186 both the dynamic object and the regular object will refer to the
11187 same memory location for the variable. */
11188 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
11189 BFD_ASSERT (s
!= NULL
);
11191 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
11192 copy the initial value out of the dynamic object and into the
11193 runtime process image. We need to remember the offset into the
11194 .rel(a).bss section we are going to use. */
11195 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
11199 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (globals
, ".bss"));
11200 BFD_ASSERT (srel
!= NULL
);
11201 srel
->size
+= RELOC_SIZE (globals
);
11205 return _bfd_elf_adjust_dynamic_copy (h
, s
);
11208 /* Allocate space in .plt, .got and associated reloc sections for
11212 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
11214 struct bfd_link_info
*info
;
11215 struct elf32_arm_link_hash_table
*htab
;
11216 struct elf32_arm_link_hash_entry
*eh
;
11217 struct elf32_arm_relocs_copied
*p
;
11218 bfd_signed_vma thumb_refs
;
11220 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11222 if (h
->root
.type
== bfd_link_hash_indirect
)
11225 if (h
->root
.type
== bfd_link_hash_warning
)
11226 /* When warning symbols are created, they **replace** the "real"
11227 entry in the hash table, thus we never get to see the real
11228 symbol in a hash traversal. So look at it now. */
11229 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11231 info
= (struct bfd_link_info
*) inf
;
11232 htab
= elf32_arm_hash_table (info
);
11234 if (htab
->root
.dynamic_sections_created
11235 && h
->plt
.refcount
> 0)
11237 /* Make sure this symbol is output as a dynamic symbol.
11238 Undefined weak syms won't yet be marked as dynamic. */
11239 if (h
->dynindx
== -1
11240 && !h
->forced_local
)
11242 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11247 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
11249 asection
*s
= htab
->splt
;
11251 /* If this is the first .plt entry, make room for the special
11254 s
->size
+= htab
->plt_header_size
;
11256 h
->plt
.offset
= s
->size
;
11258 /* If we will insert a Thumb trampoline before this PLT, leave room
11260 thumb_refs
= eh
->plt_thumb_refcount
;
11261 if (!htab
->use_blx
)
11262 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
11264 if (thumb_refs
> 0)
11266 h
->plt
.offset
+= PLT_THUMB_STUB_SIZE
;
11267 s
->size
+= PLT_THUMB_STUB_SIZE
;
11270 /* If this symbol is not defined in a regular file, and we are
11271 not generating a shared library, then set the symbol to this
11272 location in the .plt. This is required to make function
11273 pointers compare as equal between the normal executable and
11274 the shared library. */
11276 && !h
->def_regular
)
11278 h
->root
.u
.def
.section
= s
;
11279 h
->root
.u
.def
.value
= h
->plt
.offset
;
11281 /* Make sure the function is not marked as Thumb, in case
11282 it is the target of an ABS32 relocation, which will
11283 point to the PLT entry. */
11284 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
11285 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
11288 /* Make room for this entry. */
11289 s
->size
+= htab
->plt_entry_size
;
11291 if (!htab
->symbian_p
)
11293 /* We also need to make an entry in the .got.plt section, which
11294 will be placed in the .got section by the linker script. */
11295 eh
->plt_got_offset
= htab
->sgotplt
->size
;
11296 htab
->sgotplt
->size
+= 4;
11299 /* We also need to make an entry in the .rel(a).plt section. */
11300 htab
->srelplt
->size
+= RELOC_SIZE (htab
);
11302 /* VxWorks executables have a second set of relocations for
11303 each PLT entry. They go in a separate relocation section,
11304 which is processed by the kernel loader. */
11305 if (htab
->vxworks_p
&& !info
->shared
)
11307 /* There is a relocation for the initial PLT entry:
11308 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
11309 if (h
->plt
.offset
== htab
->plt_header_size
)
11310 htab
->srelplt2
->size
+= RELOC_SIZE (htab
);
11312 /* There are two extra relocations for each subsequent
11313 PLT entry: an R_ARM_32 relocation for the GOT entry,
11314 and an R_ARM_32 relocation for the PLT entry. */
11315 htab
->srelplt2
->size
+= RELOC_SIZE (htab
) * 2;
11320 h
->plt
.offset
= (bfd_vma
) -1;
11326 h
->plt
.offset
= (bfd_vma
) -1;
11330 if (h
->got
.refcount
> 0)
11334 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
11337 /* Make sure this symbol is output as a dynamic symbol.
11338 Undefined weak syms won't yet be marked as dynamic. */
11339 if (h
->dynindx
== -1
11340 && !h
->forced_local
)
11342 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11346 if (!htab
->symbian_p
)
11349 h
->got
.offset
= s
->size
;
11351 if (tls_type
== GOT_UNKNOWN
)
11354 if (tls_type
== GOT_NORMAL
)
11355 /* Non-TLS symbols need one GOT slot. */
11359 if (tls_type
& GOT_TLS_GD
)
11360 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
11362 if (tls_type
& GOT_TLS_IE
)
11363 /* R_ARM_TLS_IE32 needs one GOT slot. */
11367 dyn
= htab
->root
.dynamic_sections_created
;
11370 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
11372 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
11375 if (tls_type
!= GOT_NORMAL
11376 && (info
->shared
|| indx
!= 0)
11377 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11378 || h
->root
.type
!= bfd_link_hash_undefweak
))
11380 if (tls_type
& GOT_TLS_IE
)
11381 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11383 if (tls_type
& GOT_TLS_GD
)
11384 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11386 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
11387 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11389 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11390 || h
->root
.type
!= bfd_link_hash_undefweak
)
11392 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
11393 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11397 h
->got
.offset
= (bfd_vma
) -1;
11399 /* Allocate stubs for exported Thumb functions on v4t. */
11400 if (!htab
->use_blx
&& h
->dynindx
!= -1
11402 && ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
11403 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
11405 struct elf_link_hash_entry
* th
;
11406 struct bfd_link_hash_entry
* bh
;
11407 struct elf_link_hash_entry
* myh
;
11411 /* Create a new symbol to regist the real location of the function. */
11412 s
= h
->root
.u
.def
.section
;
11413 sprintf (name
, "__real_%s", h
->root
.root
.string
);
11414 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
11415 name
, BSF_GLOBAL
, s
,
11416 h
->root
.u
.def
.value
,
11417 NULL
, TRUE
, FALSE
, &bh
);
11419 myh
= (struct elf_link_hash_entry
*) bh
;
11420 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_ARM_TFUNC
);
11421 myh
->forced_local
= 1;
11422 eh
->export_glue
= myh
;
11423 th
= record_arm_to_thumb_glue (info
, h
);
11424 /* Point the symbol at the stub. */
11425 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
11426 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
11427 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
11430 if (eh
->relocs_copied
== NULL
)
11433 /* In the shared -Bsymbolic case, discard space allocated for
11434 dynamic pc-relative relocs against symbols which turn out to be
11435 defined in regular objects. For the normal shared case, discard
11436 space for pc-relative relocs that have become local due to symbol
11437 visibility changes. */
11439 if (info
->shared
|| htab
->root
.is_relocatable_executable
)
11441 /* The only relocs that use pc_count are R_ARM_REL32 and
11442 R_ARM_REL32_NOI, which will appear on something like
11443 ".long foo - .". We want calls to protected symbols to resolve
11444 directly to the function rather than going via the plt. If people
11445 want function pointer comparisons to work as expected then they
11446 should avoid writing assembly like ".long foo - .". */
11447 if (SYMBOL_CALLS_LOCAL (info
, h
))
11449 struct elf32_arm_relocs_copied
**pp
;
11451 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
; )
11453 p
->count
-= p
->pc_count
;
11462 if (elf32_arm_hash_table (info
)->vxworks_p
)
11464 struct elf32_arm_relocs_copied
**pp
;
11466 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
; )
11468 if (strcmp (p
->section
->output_section
->name
, ".tls_vars") == 0)
11475 /* Also discard relocs on undefined weak syms with non-default
11477 if (eh
->relocs_copied
!= NULL
11478 && h
->root
.type
== bfd_link_hash_undefweak
)
11480 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
11481 eh
->relocs_copied
= NULL
;
11483 /* Make sure undefined weak symbols are output as a dynamic
11485 else if (h
->dynindx
== -1
11486 && !h
->forced_local
)
11488 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11493 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
11494 && h
->root
.type
== bfd_link_hash_new
)
11496 /* Output absolute symbols so that we can create relocations
11497 against them. For normal symbols we output a relocation
11498 against the section that contains them. */
11499 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11506 /* For the non-shared case, discard space for relocs against
11507 symbols which turn out to need copy relocs or are not
11510 if (!h
->non_got_ref
11511 && ((h
->def_dynamic
11512 && !h
->def_regular
)
11513 || (htab
->root
.dynamic_sections_created
11514 && (h
->root
.type
== bfd_link_hash_undefweak
11515 || h
->root
.type
== bfd_link_hash_undefined
))))
11517 /* Make sure this symbol is output as a dynamic symbol.
11518 Undefined weak syms won't yet be marked as dynamic. */
11519 if (h
->dynindx
== -1
11520 && !h
->forced_local
)
11522 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11526 /* If that succeeded, we know we'll be keeping all the
11528 if (h
->dynindx
!= -1)
11532 eh
->relocs_copied
= NULL
;
11537 /* Finally, allocate space. */
11538 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
11540 asection
*sreloc
= elf_section_data (p
->section
)->sreloc
;
11541 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
11547 /* Find any dynamic relocs that apply to read-only sections. */
11550 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
11552 struct elf32_arm_link_hash_entry
* eh
;
11553 struct elf32_arm_relocs_copied
* p
;
11555 if (h
->root
.type
== bfd_link_hash_warning
)
11556 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11558 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11559 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
11561 asection
*s
= p
->section
;
11563 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
11565 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
11567 info
->flags
|= DF_TEXTREL
;
11569 /* Not an error, just cut short the traversal. */
11577 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
11580 struct elf32_arm_link_hash_table
*globals
;
11582 globals
= elf32_arm_hash_table (info
);
11583 globals
->byteswap_code
= byteswap_code
;
11586 /* Set the sizes of the dynamic sections. */
11589 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
11590 struct bfd_link_info
* info
)
11595 bfd_boolean relocs
;
11597 struct elf32_arm_link_hash_table
*htab
;
11599 htab
= elf32_arm_hash_table (info
);
11600 dynobj
= elf_hash_table (info
)->dynobj
;
11601 BFD_ASSERT (dynobj
!= NULL
);
11602 check_use_blx (htab
);
11604 if (elf_hash_table (info
)->dynamic_sections_created
)
11606 /* Set the contents of the .interp section to the interpreter. */
11607 if (info
->executable
)
11609 s
= bfd_get_section_by_name (dynobj
, ".interp");
11610 BFD_ASSERT (s
!= NULL
);
11611 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
11612 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
11616 /* Set up .got offsets for local syms, and space for local dynamic
11618 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11620 bfd_signed_vma
*local_got
;
11621 bfd_signed_vma
*end_local_got
;
11622 char *local_tls_type
;
11623 bfd_size_type locsymcount
;
11624 Elf_Internal_Shdr
*symtab_hdr
;
11626 bfd_boolean is_vxworks
= elf32_arm_hash_table (info
)->vxworks_p
;
11628 if (! is_arm_elf (ibfd
))
11631 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
11633 struct elf32_arm_relocs_copied
*p
;
11635 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
11637 if (!bfd_is_abs_section (p
->section
)
11638 && bfd_is_abs_section (p
->section
->output_section
))
11640 /* Input section has been discarded, either because
11641 it is a copy of a linkonce section or due to
11642 linker script /DISCARD/, so we'll be discarding
11645 else if (is_vxworks
11646 && strcmp (p
->section
->output_section
->name
,
11649 /* Relocations in vxworks .tls_vars sections are
11650 handled specially by the loader. */
11652 else if (p
->count
!= 0)
11654 srel
= elf_section_data (p
->section
)->sreloc
;
11655 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
11656 if ((p
->section
->output_section
->flags
& SEC_READONLY
) != 0)
11657 info
->flags
|= DF_TEXTREL
;
11662 local_got
= elf_local_got_refcounts (ibfd
);
11666 symtab_hdr
= & elf_symtab_hdr (ibfd
);
11667 locsymcount
= symtab_hdr
->sh_info
;
11668 end_local_got
= local_got
+ locsymcount
;
11669 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
11671 srel
= htab
->srelgot
;
11672 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
11674 if (*local_got
> 0)
11676 *local_got
= s
->size
;
11677 if (*local_tls_type
& GOT_TLS_GD
)
11678 /* TLS_GD relocs need an 8-byte structure in the GOT. */
11680 if (*local_tls_type
& GOT_TLS_IE
)
11682 if (*local_tls_type
== GOT_NORMAL
)
11685 if (info
->shared
|| *local_tls_type
== GOT_TLS_GD
)
11686 srel
->size
+= RELOC_SIZE (htab
);
11689 *local_got
= (bfd_vma
) -1;
11693 if (htab
->tls_ldm_got
.refcount
> 0)
11695 /* Allocate two GOT entries and one dynamic relocation (if necessary)
11696 for R_ARM_TLS_LDM32 relocations. */
11697 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
11698 htab
->sgot
->size
+= 8;
11700 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11703 htab
->tls_ldm_got
.offset
= -1;
11705 /* Allocate global sym .plt and .got entries, and space for global
11706 sym dynamic relocs. */
11707 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs
, info
);
11709 /* Here we rummage through the found bfds to collect glue information. */
11710 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11712 if (! is_arm_elf (ibfd
))
11715 /* Initialise mapping tables for code/data. */
11716 bfd_elf32_arm_init_maps (ibfd
);
11718 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
11719 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
))
11720 /* xgettext:c-format */
11721 _bfd_error_handler (_("Errors encountered processing file %s"),
11725 /* Allocate space for the glue sections now that we've sized them. */
11726 bfd_elf32_arm_allocate_interworking_sections (info
);
11728 /* The check_relocs and adjust_dynamic_symbol entry points have
11729 determined the sizes of the various dynamic sections. Allocate
11730 memory for them. */
11733 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
11737 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
11740 /* It's OK to base decisions on the section name, because none
11741 of the dynobj section names depend upon the input files. */
11742 name
= bfd_get_section_name (dynobj
, s
);
11744 if (strcmp (name
, ".plt") == 0)
11746 /* Remember whether there is a PLT. */
11747 plt
= s
->size
!= 0;
11749 else if (CONST_STRNEQ (name
, ".rel"))
11753 /* Remember whether there are any reloc sections other
11754 than .rel(a).plt and .rela.plt.unloaded. */
11755 if (s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
11758 /* We use the reloc_count field as a counter if we need
11759 to copy relocs into the output file. */
11760 s
->reloc_count
= 0;
11763 else if (! CONST_STRNEQ (name
, ".got")
11764 && strcmp (name
, ".dynbss") != 0)
11766 /* It's not one of our sections, so don't allocate space. */
11772 /* If we don't need this section, strip it from the
11773 output file. This is mostly to handle .rel(a).bss and
11774 .rel(a).plt. We must create both sections in
11775 create_dynamic_sections, because they must be created
11776 before the linker maps input sections to output
11777 sections. The linker does that before
11778 adjust_dynamic_symbol is called, and it is that
11779 function which decides whether anything needs to go
11780 into these sections. */
11781 s
->flags
|= SEC_EXCLUDE
;
11785 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
11788 /* Allocate memory for the section contents. */
11789 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
11790 if (s
->contents
== NULL
)
11794 if (elf_hash_table (info
)->dynamic_sections_created
)
11796 /* Add some entries to the .dynamic section. We fill in the
11797 values later, in elf32_arm_finish_dynamic_sections, but we
11798 must add the entries now so that we get the correct size for
11799 the .dynamic section. The DT_DEBUG entry is filled in by the
11800 dynamic linker and used by the debugger. */
11801 #define add_dynamic_entry(TAG, VAL) \
11802 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
11804 if (info
->executable
)
11806 if (!add_dynamic_entry (DT_DEBUG
, 0))
11812 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
11813 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
11814 || !add_dynamic_entry (DT_PLTREL
,
11815 htab
->use_rel
? DT_REL
: DT_RELA
)
11816 || !add_dynamic_entry (DT_JMPREL
, 0))
11824 if (!add_dynamic_entry (DT_REL
, 0)
11825 || !add_dynamic_entry (DT_RELSZ
, 0)
11826 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
11831 if (!add_dynamic_entry (DT_RELA
, 0)
11832 || !add_dynamic_entry (DT_RELASZ
, 0)
11833 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
11838 /* If any dynamic relocs apply to a read-only section,
11839 then we need a DT_TEXTREL entry. */
11840 if ((info
->flags
& DF_TEXTREL
) == 0)
11841 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
11844 if ((info
->flags
& DF_TEXTREL
) != 0)
11846 if (!add_dynamic_entry (DT_TEXTREL
, 0))
11849 if (htab
->vxworks_p
11850 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
11853 #undef add_dynamic_entry
11858 /* Finish up dynamic symbol handling. We set the contents of various
11859 dynamic sections here. */
11862 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
11863 struct bfd_link_info
* info
,
11864 struct elf_link_hash_entry
* h
,
11865 Elf_Internal_Sym
* sym
)
11868 struct elf32_arm_link_hash_table
*htab
;
11869 struct elf32_arm_link_hash_entry
*eh
;
11871 dynobj
= elf_hash_table (info
)->dynobj
;
11872 htab
= elf32_arm_hash_table (info
);
11873 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11875 if (h
->plt
.offset
!= (bfd_vma
) -1)
11881 Elf_Internal_Rela rel
;
11883 /* This symbol has an entry in the procedure linkage table. Set
11886 BFD_ASSERT (h
->dynindx
!= -1);
11888 splt
= bfd_get_section_by_name (dynobj
, ".plt");
11889 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (htab
, ".plt"));
11890 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
11892 /* Fill in the entry in the procedure linkage table. */
11893 if (htab
->symbian_p
)
11895 put_arm_insn (htab
, output_bfd
,
11896 elf32_arm_symbian_plt_entry
[0],
11897 splt
->contents
+ h
->plt
.offset
);
11898 bfd_put_32 (output_bfd
,
11899 elf32_arm_symbian_plt_entry
[1],
11900 splt
->contents
+ h
->plt
.offset
+ 4);
11902 /* Fill in the entry in the .rel.plt section. */
11903 rel
.r_offset
= (splt
->output_section
->vma
11904 + splt
->output_offset
11905 + h
->plt
.offset
+ 4);
11906 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
11908 /* Get the index in the procedure linkage table which
11909 corresponds to this symbol. This is the index of this symbol
11910 in all the symbols for which we are making plt entries. The
11911 first entry in the procedure linkage table is reserved. */
11912 plt_index
= ((h
->plt
.offset
- htab
->plt_header_size
)
11913 / htab
->plt_entry_size
);
11917 bfd_vma got_offset
, got_address
, plt_address
;
11918 bfd_vma got_displacement
;
11922 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
11923 BFD_ASSERT (sgot
!= NULL
);
11925 /* Get the offset into the .got.plt table of the entry that
11926 corresponds to this function. */
11927 got_offset
= eh
->plt_got_offset
;
11929 /* Get the index in the procedure linkage table which
11930 corresponds to this symbol. This is the index of this symbol
11931 in all the symbols for which we are making plt entries. The
11932 first three entries in .got.plt are reserved; after that
11933 symbols appear in the same order as in .plt. */
11934 plt_index
= (got_offset
- 12) / 4;
11936 /* Calculate the address of the GOT entry. */
11937 got_address
= (sgot
->output_section
->vma
11938 + sgot
->output_offset
11941 /* ...and the address of the PLT entry. */
11942 plt_address
= (splt
->output_section
->vma
11943 + splt
->output_offset
11946 ptr
= htab
->splt
->contents
+ h
->plt
.offset
;
11947 if (htab
->vxworks_p
&& info
->shared
)
11952 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
11954 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
11956 val
|= got_address
- sgot
->output_section
->vma
;
11958 val
|= plt_index
* RELOC_SIZE (htab
);
11959 if (i
== 2 || i
== 5)
11960 bfd_put_32 (output_bfd
, val
, ptr
);
11962 put_arm_insn (htab
, output_bfd
, val
, ptr
);
11965 else if (htab
->vxworks_p
)
11970 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
11972 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
11974 val
|= got_address
;
11976 val
|= 0xffffff & -((h
->plt
.offset
+ i
* 4 + 8) >> 2);
11978 val
|= plt_index
* RELOC_SIZE (htab
);
11979 if (i
== 2 || i
== 5)
11980 bfd_put_32 (output_bfd
, val
, ptr
);
11982 put_arm_insn (htab
, output_bfd
, val
, ptr
);
11985 loc
= (htab
->srelplt2
->contents
11986 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
11988 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
11989 referencing the GOT for this PLT entry. */
11990 rel
.r_offset
= plt_address
+ 8;
11991 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
11992 rel
.r_addend
= got_offset
;
11993 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
11994 loc
+= RELOC_SIZE (htab
);
11996 /* Create the R_ARM_ABS32 relocation referencing the
11997 beginning of the PLT for this GOT entry. */
11998 rel
.r_offset
= got_address
;
11999 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
12001 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12005 bfd_signed_vma thumb_refs
;
12006 /* Calculate the displacement between the PLT slot and the
12007 entry in the GOT. The eight-byte offset accounts for the
12008 value produced by adding to pc in the first instruction
12009 of the PLT stub. */
12010 got_displacement
= got_address
- (plt_address
+ 8);
12012 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
12014 thumb_refs
= eh
->plt_thumb_refcount
;
12015 if (!htab
->use_blx
)
12016 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
12018 if (thumb_refs
> 0)
12020 put_thumb_insn (htab
, output_bfd
,
12021 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
12022 put_thumb_insn (htab
, output_bfd
,
12023 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
12026 put_arm_insn (htab
, output_bfd
,
12027 elf32_arm_plt_entry
[0]
12028 | ((got_displacement
& 0x0ff00000) >> 20),
12030 put_arm_insn (htab
, output_bfd
,
12031 elf32_arm_plt_entry
[1]
12032 | ((got_displacement
& 0x000ff000) >> 12),
12034 put_arm_insn (htab
, output_bfd
,
12035 elf32_arm_plt_entry
[2]
12036 | (got_displacement
& 0x00000fff),
12038 #ifdef FOUR_WORD_PLT
12039 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3], ptr
+ 12);
12043 /* Fill in the entry in the global offset table. */
12044 bfd_put_32 (output_bfd
,
12045 (splt
->output_section
->vma
12046 + splt
->output_offset
),
12047 sgot
->contents
+ got_offset
);
12049 /* Fill in the entry in the .rel(a).plt section. */
12051 rel
.r_offset
= got_address
;
12052 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_JUMP_SLOT
);
12055 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
12056 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12058 if (!h
->def_regular
)
12060 /* Mark the symbol as undefined, rather than as defined in
12061 the .plt section. Leave the value alone. */
12062 sym
->st_shndx
= SHN_UNDEF
;
12063 /* If the symbol is weak, we do need to clear the value.
12064 Otherwise, the PLT entry would provide a definition for
12065 the symbol even if the symbol wasn't defined anywhere,
12066 and so the symbol would never be NULL. */
12067 if (!h
->ref_regular_nonweak
)
12072 if (h
->got
.offset
!= (bfd_vma
) -1
12073 && (elf32_arm_hash_entry (h
)->tls_type
& GOT_TLS_GD
) == 0
12074 && (elf32_arm_hash_entry (h
)->tls_type
& GOT_TLS_IE
) == 0)
12078 Elf_Internal_Rela rel
;
12082 /* This symbol has an entry in the global offset table. Set it
12084 sgot
= bfd_get_section_by_name (dynobj
, ".got");
12085 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (htab
, ".got"));
12086 BFD_ASSERT (sgot
!= NULL
&& srel
!= NULL
);
12088 offset
= (h
->got
.offset
& ~(bfd_vma
) 1);
12090 rel
.r_offset
= (sgot
->output_section
->vma
12091 + sgot
->output_offset
12094 /* If this is a static link, or it is a -Bsymbolic link and the
12095 symbol is defined locally or was forced to be local because
12096 of a version file, we just want to emit a RELATIVE reloc.
12097 The entry in the global offset table will already have been
12098 initialized in the relocate_section function. */
12100 && SYMBOL_REFERENCES_LOCAL (info
, h
))
12102 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
12103 rel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
12104 if (!htab
->use_rel
)
12106 rel
.r_addend
= bfd_get_32 (output_bfd
, sgot
->contents
+ offset
);
12107 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
12112 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
12113 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
12114 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
12117 loc
= srel
->contents
+ srel
->reloc_count
++ * RELOC_SIZE (htab
);
12118 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12124 Elf_Internal_Rela rel
;
12127 /* This symbol needs a copy reloc. Set it up. */
12128 BFD_ASSERT (h
->dynindx
!= -1
12129 && (h
->root
.type
== bfd_link_hash_defined
12130 || h
->root
.type
== bfd_link_hash_defweak
));
12132 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
12133 RELOC_SECTION (htab
, ".bss"));
12134 BFD_ASSERT (s
!= NULL
);
12137 rel
.r_offset
= (h
->root
.u
.def
.value
12138 + h
->root
.u
.def
.section
->output_section
->vma
12139 + h
->root
.u
.def
.section
->output_offset
);
12140 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
12141 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
12142 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12145 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
12146 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
12147 to the ".got" section. */
12148 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
12149 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
12150 sym
->st_shndx
= SHN_ABS
;
12155 /* Finish up the dynamic sections. */
12158 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
12164 dynobj
= elf_hash_table (info
)->dynobj
;
12166 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
12167 BFD_ASSERT (elf32_arm_hash_table (info
)->symbian_p
|| sgot
!= NULL
);
12168 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
12170 if (elf_hash_table (info
)->dynamic_sections_created
)
12173 Elf32_External_Dyn
*dyncon
, *dynconend
;
12174 struct elf32_arm_link_hash_table
*htab
;
12176 htab
= elf32_arm_hash_table (info
);
12177 splt
= bfd_get_section_by_name (dynobj
, ".plt");
12178 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
12180 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
12181 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
12183 for (; dyncon
< dynconend
; dyncon
++)
12185 Elf_Internal_Dyn dyn
;
12189 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
12196 if (htab
->vxworks_p
12197 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
12198 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12203 goto get_vma_if_bpabi
;
12206 goto get_vma_if_bpabi
;
12209 goto get_vma_if_bpabi
;
12211 name
= ".gnu.version";
12212 goto get_vma_if_bpabi
;
12214 name
= ".gnu.version_d";
12215 goto get_vma_if_bpabi
;
12217 name
= ".gnu.version_r";
12218 goto get_vma_if_bpabi
;
12224 name
= RELOC_SECTION (htab
, ".plt");
12226 s
= bfd_get_section_by_name (output_bfd
, name
);
12227 BFD_ASSERT (s
!= NULL
);
12228 if (!htab
->symbian_p
)
12229 dyn
.d_un
.d_ptr
= s
->vma
;
12231 /* In the BPABI, tags in the PT_DYNAMIC section point
12232 at the file offset, not the memory address, for the
12233 convenience of the post linker. */
12234 dyn
.d_un
.d_ptr
= s
->filepos
;
12235 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12239 if (htab
->symbian_p
)
12244 s
= bfd_get_section_by_name (output_bfd
,
12245 RELOC_SECTION (htab
, ".plt"));
12246 BFD_ASSERT (s
!= NULL
);
12247 dyn
.d_un
.d_val
= s
->size
;
12248 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12253 if (!htab
->symbian_p
)
12255 /* My reading of the SVR4 ABI indicates that the
12256 procedure linkage table relocs (DT_JMPREL) should be
12257 included in the overall relocs (DT_REL). This is
12258 what Solaris does. However, UnixWare can not handle
12259 that case. Therefore, we override the DT_RELSZ entry
12260 here to make it not include the JMPREL relocs. Since
12261 the linker script arranges for .rel(a).plt to follow all
12262 other relocation sections, we don't have to worry
12263 about changing the DT_REL entry. */
12264 s
= bfd_get_section_by_name (output_bfd
,
12265 RELOC_SECTION (htab
, ".plt"));
12267 dyn
.d_un
.d_val
-= s
->size
;
12268 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12271 /* Fall through. */
12275 /* In the BPABI, the DT_REL tag must point at the file
12276 offset, not the VMA, of the first relocation
12277 section. So, we use code similar to that in
12278 elflink.c, but do not check for SHF_ALLOC on the
12279 relcoation section, since relocations sections are
12280 never allocated under the BPABI. The comments above
12281 about Unixware notwithstanding, we include all of the
12282 relocations here. */
12283 if (htab
->symbian_p
)
12286 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
12287 ? SHT_REL
: SHT_RELA
);
12288 dyn
.d_un
.d_val
= 0;
12289 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
12291 Elf_Internal_Shdr
*hdr
12292 = elf_elfsections (output_bfd
)[i
];
12293 if (hdr
->sh_type
== type
)
12295 if (dyn
.d_tag
== DT_RELSZ
12296 || dyn
.d_tag
== DT_RELASZ
)
12297 dyn
.d_un
.d_val
+= hdr
->sh_size
;
12298 else if ((ufile_ptr
) hdr
->sh_offset
12299 <= dyn
.d_un
.d_val
- 1)
12300 dyn
.d_un
.d_val
= hdr
->sh_offset
;
12303 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12307 /* Set the bottom bit of DT_INIT/FINI if the
12308 corresponding function is Thumb. */
12310 name
= info
->init_function
;
12313 name
= info
->fini_function
;
12315 /* If it wasn't set by elf_bfd_final_link
12316 then there is nothing to adjust. */
12317 if (dyn
.d_un
.d_val
!= 0)
12319 struct elf_link_hash_entry
* eh
;
12321 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
12322 FALSE
, FALSE
, TRUE
);
12324 && ELF_ST_TYPE (eh
->type
) == STT_ARM_TFUNC
)
12326 dyn
.d_un
.d_val
|= 1;
12327 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12334 /* Fill in the first entry in the procedure linkage table. */
12335 if (splt
->size
> 0 && elf32_arm_hash_table (info
)->plt_header_size
)
12337 const bfd_vma
*plt0_entry
;
12338 bfd_vma got_address
, plt_address
, got_displacement
;
12340 /* Calculate the addresses of the GOT and PLT. */
12341 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
12342 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
12344 if (htab
->vxworks_p
)
12346 /* The VxWorks GOT is relocated by the dynamic linker.
12347 Therefore, we must emit relocations rather than simply
12348 computing the values now. */
12349 Elf_Internal_Rela rel
;
12351 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
12352 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
12353 splt
->contents
+ 0);
12354 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
12355 splt
->contents
+ 4);
12356 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
12357 splt
->contents
+ 8);
12358 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
12360 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
12361 rel
.r_offset
= plt_address
+ 12;
12362 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12364 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
12365 htab
->srelplt2
->contents
);
12369 got_displacement
= got_address
- (plt_address
+ 16);
12371 plt0_entry
= elf32_arm_plt0_entry
;
12372 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
12373 splt
->contents
+ 0);
12374 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
12375 splt
->contents
+ 4);
12376 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
12377 splt
->contents
+ 8);
12378 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
12379 splt
->contents
+ 12);
12381 #ifdef FOUR_WORD_PLT
12382 /* The displacement value goes in the otherwise-unused
12383 last word of the second entry. */
12384 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
12386 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
12391 /* UnixWare sets the entsize of .plt to 4, although that doesn't
12392 really seem like the right value. */
12393 if (splt
->output_section
->owner
== output_bfd
)
12394 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
12396 if (htab
->vxworks_p
&& !info
->shared
&& htab
->splt
->size
> 0)
12398 /* Correct the .rel(a).plt.unloaded relocations. They will have
12399 incorrect symbol indexes. */
12403 num_plts
= ((htab
->splt
->size
- htab
->plt_header_size
)
12404 / htab
->plt_entry_size
);
12405 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
12407 for (; num_plts
; num_plts
--)
12409 Elf_Internal_Rela rel
;
12411 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
12412 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12413 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
12414 p
+= RELOC_SIZE (htab
);
12416 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
12417 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
12418 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
12419 p
+= RELOC_SIZE (htab
);
12424 /* Fill in the first three entries in the global offset table. */
12427 if (sgot
->size
> 0)
12430 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
12432 bfd_put_32 (output_bfd
,
12433 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
12435 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
12436 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
12439 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
12446 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
12448 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
12449 struct elf32_arm_link_hash_table
*globals
;
12451 i_ehdrp
= elf_elfheader (abfd
);
12453 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
12454 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
12456 i_ehdrp
->e_ident
[EI_OSABI
] = 0;
12457 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
12461 globals
= elf32_arm_hash_table (link_info
);
12462 if (globals
->byteswap_code
)
12463 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
12467 static enum elf_reloc_type_class
12468 elf32_arm_reloc_type_class (const Elf_Internal_Rela
*rela
)
12470 switch ((int) ELF32_R_TYPE (rela
->r_info
))
12472 case R_ARM_RELATIVE
:
12473 return reloc_class_relative
;
12474 case R_ARM_JUMP_SLOT
:
12475 return reloc_class_plt
;
12477 return reloc_class_copy
;
12479 return reloc_class_normal
;
12483 /* Set the right machine number for an Arm ELF file. */
12486 elf32_arm_section_flags (flagword
*flags
, const Elf_Internal_Shdr
*hdr
)
12488 if (hdr
->sh_type
== SHT_NOTE
)
12489 *flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_SAME_CONTENTS
;
12495 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
12497 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
12500 /* Return TRUE if this is an unwinding table entry. */
12503 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
12505 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
12506 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
12510 /* Set the type and flags for an ARM section. We do this by
12511 the section name, which is a hack, but ought to work. */
12514 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
12518 name
= bfd_get_section_name (abfd
, sec
);
12520 if (is_arm_elf_unwind_section_name (abfd
, name
))
12522 hdr
->sh_type
= SHT_ARM_EXIDX
;
12523 hdr
->sh_flags
|= SHF_LINK_ORDER
;
12528 /* Handle an ARM specific section when reading an object file. This is
12529 called when bfd_section_from_shdr finds a section with an unknown
12533 elf32_arm_section_from_shdr (bfd
*abfd
,
12534 Elf_Internal_Shdr
* hdr
,
12538 /* There ought to be a place to keep ELF backend specific flags, but
12539 at the moment there isn't one. We just keep track of the
12540 sections by their name, instead. Fortunately, the ABI gives
12541 names for all the ARM specific sections, so we will probably get
12543 switch (hdr
->sh_type
)
12545 case SHT_ARM_EXIDX
:
12546 case SHT_ARM_PREEMPTMAP
:
12547 case SHT_ARM_ATTRIBUTES
:
12554 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
12560 /* A structure used to record a list of sections, independently
12561 of the next and prev fields in the asection structure. */
12562 typedef struct section_list
12565 struct section_list
* next
;
12566 struct section_list
* prev
;
12570 /* Unfortunately we need to keep a list of sections for which
12571 an _arm_elf_section_data structure has been allocated. This
12572 is because it is possible for functions like elf32_arm_write_section
12573 to be called on a section which has had an elf_data_structure
12574 allocated for it (and so the used_by_bfd field is valid) but
12575 for which the ARM extended version of this structure - the
12576 _arm_elf_section_data structure - has not been allocated. */
12577 static section_list
* sections_with_arm_elf_section_data
= NULL
;
12580 record_section_with_arm_elf_section_data (asection
* sec
)
12582 struct section_list
* entry
;
12584 entry
= bfd_malloc (sizeof (* entry
));
12588 entry
->next
= sections_with_arm_elf_section_data
;
12589 entry
->prev
= NULL
;
12590 if (entry
->next
!= NULL
)
12591 entry
->next
->prev
= entry
;
12592 sections_with_arm_elf_section_data
= entry
;
12595 static struct section_list
*
12596 find_arm_elf_section_entry (asection
* sec
)
12598 struct section_list
* entry
;
12599 static struct section_list
* last_entry
= NULL
;
12601 /* This is a short cut for the typical case where the sections are added
12602 to the sections_with_arm_elf_section_data list in forward order and
12603 then looked up here in backwards order. This makes a real difference
12604 to the ld-srec/sec64k.exp linker test. */
12605 entry
= sections_with_arm_elf_section_data
;
12606 if (last_entry
!= NULL
)
12608 if (last_entry
->sec
== sec
)
12609 entry
= last_entry
;
12610 else if (last_entry
->next
!= NULL
12611 && last_entry
->next
->sec
== sec
)
12612 entry
= last_entry
->next
;
12615 for (; entry
; entry
= entry
->next
)
12616 if (entry
->sec
== sec
)
12620 /* Record the entry prior to this one - it is the entry we are most
12621 likely to want to locate next time. Also this way if we have been
12622 called from unrecord_section_with_arm_elf_section_data() we will not
12623 be caching a pointer that is about to be freed. */
12624 last_entry
= entry
->prev
;
12629 static _arm_elf_section_data
*
12630 get_arm_elf_section_data (asection
* sec
)
12632 struct section_list
* entry
;
12634 entry
= find_arm_elf_section_entry (sec
);
12637 return elf32_arm_section_data (entry
->sec
);
12643 unrecord_section_with_arm_elf_section_data (asection
* sec
)
12645 struct section_list
* entry
;
12647 entry
= find_arm_elf_section_entry (sec
);
12651 if (entry
->prev
!= NULL
)
12652 entry
->prev
->next
= entry
->next
;
12653 if (entry
->next
!= NULL
)
12654 entry
->next
->prev
= entry
->prev
;
12655 if (entry
== sections_with_arm_elf_section_data
)
12656 sections_with_arm_elf_section_data
= entry
->next
;
12665 struct bfd_link_info
*info
;
12668 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
12669 asection
*, struct elf_link_hash_entry
*);
12670 } output_arch_syminfo
;
12672 enum map_symbol_type
12680 /* Output a single mapping symbol. */
12683 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
12684 enum map_symbol_type type
,
12687 static const char *names
[3] = {"$a", "$t", "$d"};
12688 struct elf32_arm_link_hash_table
*htab
;
12689 Elf_Internal_Sym sym
;
12691 htab
= elf32_arm_hash_table (osi
->info
);
12692 sym
.st_value
= osi
->sec
->output_section
->vma
12693 + osi
->sec
->output_offset
12697 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
12698 sym
.st_shndx
= osi
->sec_shndx
;
12699 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
12703 /* Output mapping symbols for PLT entries associated with H. */
12706 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
12708 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
12709 struct elf32_arm_link_hash_table
*htab
;
12710 struct elf32_arm_link_hash_entry
*eh
;
12713 htab
= elf32_arm_hash_table (osi
->info
);
12715 if (h
->root
.type
== bfd_link_hash_indirect
)
12718 if (h
->root
.type
== bfd_link_hash_warning
)
12719 /* When warning symbols are created, they **replace** the "real"
12720 entry in the hash table, thus we never get to see the real
12721 symbol in a hash traversal. So look at it now. */
12722 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12724 if (h
->plt
.offset
== (bfd_vma
) -1)
12727 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12728 addr
= h
->plt
.offset
;
12729 if (htab
->symbian_p
)
12731 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12733 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
12736 else if (htab
->vxworks_p
)
12738 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12740 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
12742 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
12744 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
12749 bfd_signed_vma thumb_refs
;
12751 thumb_refs
= eh
->plt_thumb_refcount
;
12752 if (!htab
->use_blx
)
12753 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
12755 if (thumb_refs
> 0)
12757 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
12760 #ifdef FOUR_WORD_PLT
12761 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12763 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
12766 /* A three-word PLT with no Thumb thunk contains only Arm code,
12767 so only need to output a mapping symbol for the first PLT entry and
12768 entries with thumb thunks. */
12769 if (thumb_refs
> 0 || addr
== 20)
12771 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12780 /* Output a single local symbol for a generated stub. */
12783 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
12784 bfd_vma offset
, bfd_vma size
)
12786 struct elf32_arm_link_hash_table
*htab
;
12787 Elf_Internal_Sym sym
;
12789 htab
= elf32_arm_hash_table (osi
->info
);
12790 sym
.st_value
= osi
->sec
->output_section
->vma
12791 + osi
->sec
->output_offset
12793 sym
.st_size
= size
;
12795 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
12796 sym
.st_shndx
= osi
->sec_shndx
;
12797 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
12801 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
12804 struct elf32_arm_stub_hash_entry
*stub_entry
;
12805 struct bfd_link_info
*info
;
12806 struct elf32_arm_link_hash_table
*htab
;
12807 asection
*stub_sec
;
12810 output_arch_syminfo
*osi
;
12811 const insn_sequence
*template;
12812 enum stub_insn_type prev_type
;
12815 enum map_symbol_type sym_type
;
12817 /* Massage our args to the form they really have. */
12818 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
12819 osi
= (output_arch_syminfo
*) in_arg
;
12823 htab
= elf32_arm_hash_table (info
);
12824 stub_sec
= stub_entry
->stub_sec
;
12826 /* Ensure this stub is attached to the current section being
12828 if (stub_sec
!= osi
->sec
)
12831 addr
= (bfd_vma
) stub_entry
->stub_offset
;
12832 stub_name
= stub_entry
->output_name
;
12834 template = stub_entry
->stub_template
;
12835 switch (template[0].type
)
12838 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
, stub_entry
->stub_size
))
12843 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
12844 stub_entry
->stub_size
))
12852 prev_type
= DATA_TYPE
;
12854 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
12856 switch (template[i
].type
)
12859 sym_type
= ARM_MAP_ARM
;
12864 sym_type
= ARM_MAP_THUMB
;
12868 sym_type
= ARM_MAP_DATA
;
12876 if (template[i
].type
!= prev_type
)
12878 prev_type
= template[i
].type
;
12879 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
12883 switch (template[i
].type
)
12907 /* Output mapping symbols for linker generated sections. */
12910 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
12911 struct bfd_link_info
*info
,
12913 int (*func
) (void *, const char *,
12914 Elf_Internal_Sym
*,
12916 struct elf_link_hash_entry
*))
12918 output_arch_syminfo osi
;
12919 struct elf32_arm_link_hash_table
*htab
;
12921 bfd_size_type size
;
12923 htab
= elf32_arm_hash_table (info
);
12924 check_use_blx (htab
);
12930 /* ARM->Thumb glue. */
12931 if (htab
->arm_glue_size
> 0)
12933 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
12934 ARM2THUMB_GLUE_SECTION_NAME
);
12936 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
12937 (output_bfd
, osi
.sec
->output_section
);
12938 if (info
->shared
|| htab
->root
.is_relocatable_executable
12939 || htab
->pic_veneer
)
12940 size
= ARM2THUMB_PIC_GLUE_SIZE
;
12941 else if (htab
->use_blx
)
12942 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
12944 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
12946 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
12948 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
12949 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
12953 /* Thumb->ARM glue. */
12954 if (htab
->thumb_glue_size
> 0)
12956 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
12957 THUMB2ARM_GLUE_SECTION_NAME
);
12959 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
12960 (output_bfd
, osi
.sec
->output_section
);
12961 size
= THUMB2ARM_GLUE_SIZE
;
12963 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
12965 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
12966 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
12970 /* ARMv4 BX veneers. */
12971 if (htab
->bx_glue_size
> 0)
12973 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
12974 ARM_BX_GLUE_SECTION_NAME
);
12976 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
12977 (output_bfd
, osi
.sec
->output_section
);
12979 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
12982 /* Long calls stubs. */
12983 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
12985 asection
* stub_sec
;
12987 for (stub_sec
= htab
->stub_bfd
->sections
;
12989 stub_sec
= stub_sec
->next
)
12991 /* Ignore non-stub sections. */
12992 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
12995 osi
.sec
= stub_sec
;
12997 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
12998 (output_bfd
, osi
.sec
->output_section
);
13000 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
13004 /* Finally, output mapping symbols for the PLT. */
13005 if (!htab
->splt
|| htab
->splt
->size
== 0)
13008 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
13009 htab
->splt
->output_section
);
13010 osi
.sec
= htab
->splt
;
13011 /* Output mapping symbols for the plt header. SymbianOS does not have a
13013 if (htab
->vxworks_p
)
13015 /* VxWorks shared libraries have no PLT header. */
13018 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
13020 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
13024 else if (!htab
->symbian_p
)
13026 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
13028 #ifndef FOUR_WORD_PLT
13029 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
13034 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, (void *) &osi
);
13038 /* Allocate target specific section data. */
13041 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
13043 if (!sec
->used_by_bfd
)
13045 _arm_elf_section_data
*sdata
;
13046 bfd_size_type amt
= sizeof (*sdata
);
13048 sdata
= bfd_zalloc (abfd
, amt
);
13051 sec
->used_by_bfd
= sdata
;
13054 record_section_with_arm_elf_section_data (sec
);
13056 return _bfd_elf_new_section_hook (abfd
, sec
);
13060 /* Used to order a list of mapping symbols by address. */
13063 elf32_arm_compare_mapping (const void * a
, const void * b
)
13065 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
13066 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
13068 if (amap
->vma
> bmap
->vma
)
13070 else if (amap
->vma
< bmap
->vma
)
13072 else if (amap
->type
> bmap
->type
)
13073 /* Ensure results do not depend on the host qsort for objects with
13074 multiple mapping symbols at the same address by sorting on type
13077 else if (amap
->type
< bmap
->type
)
13083 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
13085 static unsigned long
13086 offset_prel31 (unsigned long addr
, bfd_vma offset
)
13088 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
13091 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
13095 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
13097 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
13098 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
13100 /* High bit of first word is supposed to be zero. */
13101 if ((first_word
& 0x80000000ul
) == 0)
13102 first_word
= offset_prel31 (first_word
, offset
);
13104 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
13105 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
13106 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
13107 second_word
= offset_prel31 (second_word
, offset
);
13109 bfd_put_32 (output_bfd
, first_word
, to
);
13110 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
13113 /* Data for make_branch_to_a8_stub(). */
13115 struct a8_branch_to_stub_data
{
13116 asection
*writing_section
;
13117 bfd_byte
*contents
;
13121 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
13122 places for a particular section. */
13125 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
13128 struct elf32_arm_stub_hash_entry
*stub_entry
;
13129 struct a8_branch_to_stub_data
*data
;
13130 bfd_byte
*contents
;
13131 unsigned long branch_insn
;
13132 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
13133 bfd_signed_vma branch_offset
;
13135 unsigned int index
;
13137 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
13138 data
= (struct a8_branch_to_stub_data
*) in_arg
;
13140 if (stub_entry
->target_section
!= data
->writing_section
13141 || stub_entry
->stub_type
< arm_stub_a8_veneer_b_cond
)
13144 contents
= data
->contents
;
13146 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
13147 + stub_entry
->target_section
->output_offset
13148 + stub_entry
->target_value
;
13150 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
13151 + stub_entry
->stub_sec
->output_offset
13152 + stub_entry
->stub_offset
;
13154 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
13155 veneered_insn_loc
&= ~3u;
13157 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
13159 abfd
= stub_entry
->target_section
->owner
;
13160 index
= stub_entry
->target_value
;
13162 /* We attempt to avoid this condition by setting stubs_always_after_branch
13163 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
13164 This check is just to be on the safe side... */
13165 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
13167 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub is "
13168 "allocated in unsafe location"), abfd
);
13172 switch (stub_entry
->stub_type
)
13174 case arm_stub_a8_veneer_b
:
13175 case arm_stub_a8_veneer_b_cond
:
13176 branch_insn
= 0xf0009000;
13179 case arm_stub_a8_veneer_blx
:
13180 branch_insn
= 0xf000e800;
13183 case arm_stub_a8_veneer_bl
:
13185 unsigned int i1
, j1
, i2
, j2
, s
;
13187 branch_insn
= 0xf000d000;
13190 if (branch_offset
< -16777216 || branch_offset
> 16777214)
13192 /* There's not much we can do apart from complain if this
13194 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub out "
13195 "of range (input file too large)"), abfd
);
13199 /* i1 = not(j1 eor s), so:
13201 j1 = (not i1) eor s. */
13203 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
13204 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
13205 i2
= (branch_offset
>> 22) & 1;
13206 i1
= (branch_offset
>> 23) & 1;
13207 s
= (branch_offset
>> 24) & 1;
13210 branch_insn
|= j2
<< 11;
13211 branch_insn
|= j1
<< 13;
13212 branch_insn
|= s
<< 26;
13221 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[index
]);
13222 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[index
+ 2]);
13227 /* Do code byteswapping. Return FALSE afterwards so that the section is
13228 written out as normal. */
13231 elf32_arm_write_section (bfd
*output_bfd
,
13232 struct bfd_link_info
*link_info
,
13234 bfd_byte
*contents
)
13236 unsigned int mapcount
, errcount
;
13237 _arm_elf_section_data
*arm_data
;
13238 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
13239 elf32_arm_section_map
*map
;
13240 elf32_vfp11_erratum_list
*errnode
;
13243 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
13247 /* If this section has not been allocated an _arm_elf_section_data
13248 structure then we cannot record anything. */
13249 arm_data
= get_arm_elf_section_data (sec
);
13250 if (arm_data
== NULL
)
13253 mapcount
= arm_data
->mapcount
;
13254 map
= arm_data
->map
;
13255 errcount
= arm_data
->erratumcount
;
13259 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
13261 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
13262 errnode
= errnode
->next
)
13264 bfd_vma index
= errnode
->vma
- offset
;
13266 switch (errnode
->type
)
13268 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
13270 bfd_vma branch_to_veneer
;
13271 /* Original condition code of instruction, plus bit mask for
13272 ARM B instruction. */
13273 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
13276 /* The instruction is before the label. */
13279 /* Above offset included in -4 below. */
13280 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
13281 - errnode
->vma
- 4;
13283 if ((signed) branch_to_veneer
< -(1 << 25)
13284 || (signed) branch_to_veneer
>= (1 << 25))
13285 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
13286 "range"), output_bfd
);
13288 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
13289 contents
[endianflip
^ index
] = insn
& 0xff;
13290 contents
[endianflip
^ (index
+ 1)] = (insn
>> 8) & 0xff;
13291 contents
[endianflip
^ (index
+ 2)] = (insn
>> 16) & 0xff;
13292 contents
[endianflip
^ (index
+ 3)] = (insn
>> 24) & 0xff;
13296 case VFP11_ERRATUM_ARM_VENEER
:
13298 bfd_vma branch_from_veneer
;
13301 /* Take size of veneer into account. */
13302 branch_from_veneer
= errnode
->u
.v
.branch
->vma
13303 - errnode
->vma
- 12;
13305 if ((signed) branch_from_veneer
< -(1 << 25)
13306 || (signed) branch_from_veneer
>= (1 << 25))
13307 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
13308 "range"), output_bfd
);
13310 /* Original instruction. */
13311 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
13312 contents
[endianflip
^ index
] = insn
& 0xff;
13313 contents
[endianflip
^ (index
+ 1)] = (insn
>> 8) & 0xff;
13314 contents
[endianflip
^ (index
+ 2)] = (insn
>> 16) & 0xff;
13315 contents
[endianflip
^ (index
+ 3)] = (insn
>> 24) & 0xff;
13317 /* Branch back to insn after original insn. */
13318 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
13319 contents
[endianflip
^ (index
+ 4)] = insn
& 0xff;
13320 contents
[endianflip
^ (index
+ 5)] = (insn
>> 8) & 0xff;
13321 contents
[endianflip
^ (index
+ 6)] = (insn
>> 16) & 0xff;
13322 contents
[endianflip
^ (index
+ 7)] = (insn
>> 24) & 0xff;
13332 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
13334 arm_unwind_table_edit
*edit_node
13335 = arm_data
->u
.exidx
.unwind_edit_list
;
13336 /* Now, sec->size is the size of the section we will write. The original
13337 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
13338 markers) was sec->rawsize. (This isn't the case if we perform no
13339 edits, then rawsize will be zero and we should use size). */
13340 bfd_byte
*edited_contents
= bfd_malloc (sec
->size
);
13341 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
13342 unsigned int in_index
, out_index
;
13343 bfd_vma add_to_offsets
= 0;
13345 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
13349 unsigned int edit_index
= edit_node
->index
;
13351 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
13353 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
13354 contents
+ in_index
* 8, add_to_offsets
);
13358 else if (in_index
== edit_index
13359 || (in_index
* 8 >= input_size
13360 && edit_index
== UINT_MAX
))
13362 switch (edit_node
->type
)
13364 case DELETE_EXIDX_ENTRY
:
13366 add_to_offsets
+= 8;
13369 case INSERT_EXIDX_CANTUNWIND_AT_END
:
13371 asection
*text_sec
= edit_node
->linked_section
;
13372 bfd_vma text_offset
= text_sec
->output_section
->vma
13373 + text_sec
->output_offset
13375 bfd_vma exidx_offset
= offset
+ out_index
* 8;
13376 unsigned long prel31_offset
;
13378 /* Note: this is meant to be equivalent to an
13379 R_ARM_PREL31 relocation. These synthetic
13380 EXIDX_CANTUNWIND markers are not relocated by the
13381 usual BFD method. */
13382 prel31_offset
= (text_offset
- exidx_offset
)
13385 /* First address we can't unwind. */
13386 bfd_put_32 (output_bfd
, prel31_offset
,
13387 &edited_contents
[out_index
* 8]);
13389 /* Code for EXIDX_CANTUNWIND. */
13390 bfd_put_32 (output_bfd
, 0x1,
13391 &edited_contents
[out_index
* 8 + 4]);
13394 add_to_offsets
-= 8;
13399 edit_node
= edit_node
->next
;
13404 /* No more edits, copy remaining entries verbatim. */
13405 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
13406 contents
+ in_index
* 8, add_to_offsets
);
13412 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
13413 bfd_set_section_contents (output_bfd
, sec
->output_section
,
13415 (file_ptr
) sec
->output_offset
, sec
->size
);
13420 /* Fix code to point to Cortex-A8 erratum stubs. */
13421 if (globals
->fix_cortex_a8
)
13423 struct a8_branch_to_stub_data data
;
13425 data
.writing_section
= sec
;
13426 data
.contents
= contents
;
13428 bfd_hash_traverse (&globals
->stub_hash_table
, make_branch_to_a8_stub
,
13435 if (globals
->byteswap_code
)
13437 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
13440 for (i
= 0; i
< mapcount
; i
++)
13442 if (i
== mapcount
- 1)
13445 end
= map
[i
+ 1].vma
;
13447 switch (map
[i
].type
)
13450 /* Byte swap code words. */
13451 while (ptr
+ 3 < end
)
13453 tmp
= contents
[ptr
];
13454 contents
[ptr
] = contents
[ptr
+ 3];
13455 contents
[ptr
+ 3] = tmp
;
13456 tmp
= contents
[ptr
+ 1];
13457 contents
[ptr
+ 1] = contents
[ptr
+ 2];
13458 contents
[ptr
+ 2] = tmp
;
13464 /* Byte swap code halfwords. */
13465 while (ptr
+ 1 < end
)
13467 tmp
= contents
[ptr
];
13468 contents
[ptr
] = contents
[ptr
+ 1];
13469 contents
[ptr
+ 1] = tmp
;
13475 /* Leave data alone. */
13483 arm_data
->mapcount
= 0;
13484 arm_data
->mapsize
= 0;
13485 arm_data
->map
= NULL
;
13486 unrecord_section_with_arm_elf_section_data (sec
);
13492 unrecord_section_via_map_over_sections (bfd
* abfd ATTRIBUTE_UNUSED
,
13494 void * ignore ATTRIBUTE_UNUSED
)
13496 unrecord_section_with_arm_elf_section_data (sec
);
13500 elf32_arm_close_and_cleanup (bfd
* abfd
)
13502 if (abfd
->sections
)
13503 bfd_map_over_sections (abfd
,
13504 unrecord_section_via_map_over_sections
,
13507 return _bfd_elf_close_and_cleanup (abfd
);
13511 elf32_arm_bfd_free_cached_info (bfd
* abfd
)
13513 if (abfd
->sections
)
13514 bfd_map_over_sections (abfd
,
13515 unrecord_section_via_map_over_sections
,
13518 return _bfd_free_cached_info (abfd
);
13521 /* Display STT_ARM_TFUNC symbols as functions. */
13524 elf32_arm_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
13527 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
13529 if (ELF_ST_TYPE (elfsym
->internal_elf_sym
.st_info
) == STT_ARM_TFUNC
)
13530 elfsym
->symbol
.flags
|= BSF_FUNCTION
;
13534 /* Mangle thumb function symbols as we read them in. */
13537 elf32_arm_swap_symbol_in (bfd
* abfd
,
13540 Elf_Internal_Sym
*dst
)
13542 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
13545 /* New EABI objects mark thumb function symbols by setting the low bit of
13546 the address. Turn these into STT_ARM_TFUNC. */
13547 if ((ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
)
13548 && (dst
->st_value
& 1))
13550 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_ARM_TFUNC
);
13551 dst
->st_value
&= ~(bfd_vma
) 1;
13557 /* Mangle thumb function symbols as we write them out. */
13560 elf32_arm_swap_symbol_out (bfd
*abfd
,
13561 const Elf_Internal_Sym
*src
,
13565 Elf_Internal_Sym newsym
;
13567 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
13568 of the address set, as per the new EABI. We do this unconditionally
13569 because objcopy does not set the elf header flags until after
13570 it writes out the symbol table. */
13571 if (ELF_ST_TYPE (src
->st_info
) == STT_ARM_TFUNC
)
13574 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
13575 if (newsym
.st_shndx
!= SHN_UNDEF
)
13577 /* Do this only for defined symbols. At link type, the static
13578 linker will simulate the work of dynamic linker of resolving
13579 symbols and will carry over the thumbness of found symbols to
13580 the output symbol table. It's not clear how it happens, but
13581 the thumbness of undefined symbols can well be different at
13582 runtime, and writing '1' for them will be confusing for users
13583 and possibly for dynamic linker itself.
13585 newsym
.st_value
|= 1;
13590 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
13593 /* Add the PT_ARM_EXIDX program header. */
13596 elf32_arm_modify_segment_map (bfd
*abfd
,
13597 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
13599 struct elf_segment_map
*m
;
13602 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
13603 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
13605 /* If there is already a PT_ARM_EXIDX header, then we do not
13606 want to add another one. This situation arises when running
13607 "strip"; the input binary already has the header. */
13608 m
= elf_tdata (abfd
)->segment_map
;
13609 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
13613 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
13616 m
->p_type
= PT_ARM_EXIDX
;
13618 m
->sections
[0] = sec
;
13620 m
->next
= elf_tdata (abfd
)->segment_map
;
13621 elf_tdata (abfd
)->segment_map
= m
;
13628 /* We may add a PT_ARM_EXIDX program header. */
13631 elf32_arm_additional_program_headers (bfd
*abfd
,
13632 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
13636 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
13637 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
13643 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
13646 elf32_arm_is_function_type (unsigned int type
)
13648 return (type
== STT_FUNC
) || (type
== STT_ARM_TFUNC
);
13651 /* We use this to override swap_symbol_in and swap_symbol_out. */
13652 const struct elf_size_info elf32_arm_size_info
=
13654 sizeof (Elf32_External_Ehdr
),
13655 sizeof (Elf32_External_Phdr
),
13656 sizeof (Elf32_External_Shdr
),
13657 sizeof (Elf32_External_Rel
),
13658 sizeof (Elf32_External_Rela
),
13659 sizeof (Elf32_External_Sym
),
13660 sizeof (Elf32_External_Dyn
),
13661 sizeof (Elf_External_Note
),
13665 ELFCLASS32
, EV_CURRENT
,
13666 bfd_elf32_write_out_phdrs
,
13667 bfd_elf32_write_shdrs_and_ehdr
,
13668 bfd_elf32_checksum_contents
,
13669 bfd_elf32_write_relocs
,
13670 elf32_arm_swap_symbol_in
,
13671 elf32_arm_swap_symbol_out
,
13672 bfd_elf32_slurp_reloc_table
,
13673 bfd_elf32_slurp_symbol_table
,
13674 bfd_elf32_swap_dyn_in
,
13675 bfd_elf32_swap_dyn_out
,
13676 bfd_elf32_swap_reloc_in
,
13677 bfd_elf32_swap_reloc_out
,
13678 bfd_elf32_swap_reloca_in
,
13679 bfd_elf32_swap_reloca_out
13682 #define ELF_ARCH bfd_arch_arm
13683 #define ELF_MACHINE_CODE EM_ARM
13684 #ifdef __QNXTARGET__
13685 #define ELF_MAXPAGESIZE 0x1000
13687 #define ELF_MAXPAGESIZE 0x8000
13689 #define ELF_MINPAGESIZE 0x1000
13690 #define ELF_COMMONPAGESIZE 0x1000
13692 #define bfd_elf32_mkobject elf32_arm_mkobject
13694 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
13695 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
13696 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
13697 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
13698 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
13699 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
13700 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
13701 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
13702 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
13703 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
13704 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
13705 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
13706 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
13707 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
13708 #define bfd_elf32_bfd_final_link elf32_arm_final_link
13710 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
13711 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
13712 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
13713 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
13714 #define elf_backend_check_relocs elf32_arm_check_relocs
13715 #define elf_backend_relocate_section elf32_arm_relocate_section
13716 #define elf_backend_write_section elf32_arm_write_section
13717 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
13718 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
13719 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
13720 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
13721 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
13722 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
13723 #define elf_backend_post_process_headers elf32_arm_post_process_headers
13724 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
13725 #define elf_backend_object_p elf32_arm_object_p
13726 #define elf_backend_section_flags elf32_arm_section_flags
13727 #define elf_backend_fake_sections elf32_arm_fake_sections
13728 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
13729 #define elf_backend_final_write_processing elf32_arm_final_write_processing
13730 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
13731 #define elf_backend_symbol_processing elf32_arm_symbol_processing
13732 #define elf_backend_size_info elf32_arm_size_info
13733 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
13734 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
13735 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
13736 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
13737 #define elf_backend_is_function_type elf32_arm_is_function_type
13739 #define elf_backend_can_refcount 1
13740 #define elf_backend_can_gc_sections 1
13741 #define elf_backend_plt_readonly 1
13742 #define elf_backend_want_got_plt 1
13743 #define elf_backend_want_plt_sym 0
13744 #define elf_backend_may_use_rel_p 1
13745 #define elf_backend_may_use_rela_p 0
13746 #define elf_backend_default_use_rela_p 0
13748 #define elf_backend_got_header_size 12
13750 #undef elf_backend_obj_attrs_vendor
13751 #define elf_backend_obj_attrs_vendor "aeabi"
13752 #undef elf_backend_obj_attrs_section
13753 #define elf_backend_obj_attrs_section ".ARM.attributes"
13754 #undef elf_backend_obj_attrs_arg_type
13755 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
13756 #undef elf_backend_obj_attrs_section_type
13757 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
13758 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
13760 #include "elf32-target.h"
13762 /* VxWorks Targets. */
13764 #undef TARGET_LITTLE_SYM
13765 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
13766 #undef TARGET_LITTLE_NAME
13767 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
13768 #undef TARGET_BIG_SYM
13769 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
13770 #undef TARGET_BIG_NAME
13771 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
13773 /* Like elf32_arm_link_hash_table_create -- but overrides
13774 appropriately for VxWorks. */
13776 static struct bfd_link_hash_table
*
13777 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
13779 struct bfd_link_hash_table
*ret
;
13781 ret
= elf32_arm_link_hash_table_create (abfd
);
13784 struct elf32_arm_link_hash_table
*htab
13785 = (struct elf32_arm_link_hash_table
*) ret
;
13787 htab
->vxworks_p
= 1;
13793 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
13795 elf32_arm_final_write_processing (abfd
, linker
);
13796 elf_vxworks_final_write_processing (abfd
, linker
);
13800 #define elf32_bed elf32_arm_vxworks_bed
13802 #undef bfd_elf32_bfd_link_hash_table_create
13803 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
13804 #undef elf_backend_add_symbol_hook
13805 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
13806 #undef elf_backend_final_write_processing
13807 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
13808 #undef elf_backend_emit_relocs
13809 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
13811 #undef elf_backend_may_use_rel_p
13812 #define elf_backend_may_use_rel_p 0
13813 #undef elf_backend_may_use_rela_p
13814 #define elf_backend_may_use_rela_p 1
13815 #undef elf_backend_default_use_rela_p
13816 #define elf_backend_default_use_rela_p 1
13817 #undef elf_backend_want_plt_sym
13818 #define elf_backend_want_plt_sym 1
13819 #undef ELF_MAXPAGESIZE
13820 #define ELF_MAXPAGESIZE 0x1000
13822 #include "elf32-target.h"
13825 /* Symbian OS Targets. */
13827 #undef TARGET_LITTLE_SYM
13828 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
13829 #undef TARGET_LITTLE_NAME
13830 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
13831 #undef TARGET_BIG_SYM
13832 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
13833 #undef TARGET_BIG_NAME
13834 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
13836 /* Like elf32_arm_link_hash_table_create -- but overrides
13837 appropriately for Symbian OS. */
13839 static struct bfd_link_hash_table
*
13840 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
13842 struct bfd_link_hash_table
*ret
;
13844 ret
= elf32_arm_link_hash_table_create (abfd
);
13847 struct elf32_arm_link_hash_table
*htab
13848 = (struct elf32_arm_link_hash_table
*)ret
;
13849 /* There is no PLT header for Symbian OS. */
13850 htab
->plt_header_size
= 0;
13851 /* The PLT entries are each one instruction and one word. */
13852 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
13853 htab
->symbian_p
= 1;
13854 /* Symbian uses armv5t or above, so use_blx is always true. */
13856 htab
->root
.is_relocatable_executable
= 1;
13861 static const struct bfd_elf_special_section
13862 elf32_arm_symbian_special_sections
[] =
13864 /* In a BPABI executable, the dynamic linking sections do not go in
13865 the loadable read-only segment. The post-linker may wish to
13866 refer to these sections, but they are not part of the final
13868 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
13869 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
13870 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
13871 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
13872 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
13873 /* These sections do not need to be writable as the SymbianOS
13874 postlinker will arrange things so that no dynamic relocation is
13876 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
13877 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
13878 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
13879 { NULL
, 0, 0, 0, 0 }
13883 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
13884 struct bfd_link_info
*link_info
)
13886 /* BPABI objects are never loaded directly by an OS kernel; they are
13887 processed by a postlinker first, into an OS-specific format. If
13888 the D_PAGED bit is set on the file, BFD will align segments on
13889 page boundaries, so that an OS can directly map the file. With
13890 BPABI objects, that just results in wasted space. In addition,
13891 because we clear the D_PAGED bit, map_sections_to_segments will
13892 recognize that the program headers should not be mapped into any
13893 loadable segment. */
13894 abfd
->flags
&= ~D_PAGED
;
13895 elf32_arm_begin_write_processing (abfd
, link_info
);
13899 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
13900 struct bfd_link_info
*info
)
13902 struct elf_segment_map
*m
;
13905 /* BPABI shared libraries and executables should have a PT_DYNAMIC
13906 segment. However, because the .dynamic section is not marked
13907 with SEC_LOAD, the generic ELF code will not create such a
13909 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
13912 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
13913 if (m
->p_type
== PT_DYNAMIC
)
13918 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
13919 m
->next
= elf_tdata (abfd
)->segment_map
;
13920 elf_tdata (abfd
)->segment_map
= m
;
13924 /* Also call the generic arm routine. */
13925 return elf32_arm_modify_segment_map (abfd
, info
);
13928 /* Return address for Ith PLT stub in section PLT, for relocation REL
13929 or (bfd_vma) -1 if it should not be included. */
13932 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
13933 const arelent
*rel ATTRIBUTE_UNUSED
)
13935 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
13940 #define elf32_bed elf32_arm_symbian_bed
13942 /* The dynamic sections are not allocated on SymbianOS; the postlinker
13943 will process them and then discard them. */
13944 #undef ELF_DYNAMIC_SEC_FLAGS
13945 #define ELF_DYNAMIC_SEC_FLAGS \
13946 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
13948 #undef elf_backend_add_symbol_hook
13949 #undef elf_backend_emit_relocs
13951 #undef bfd_elf32_bfd_link_hash_table_create
13952 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
13953 #undef elf_backend_special_sections
13954 #define elf_backend_special_sections elf32_arm_symbian_special_sections
13955 #undef elf_backend_begin_write_processing
13956 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
13957 #undef elf_backend_final_write_processing
13958 #define elf_backend_final_write_processing elf32_arm_final_write_processing
13960 #undef elf_backend_modify_segment_map
13961 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
13963 /* There is no .got section for BPABI objects, and hence no header. */
13964 #undef elf_backend_got_header_size
13965 #define elf_backend_got_header_size 0
13967 /* Similarly, there is no .got.plt section. */
13968 #undef elf_backend_want_got_plt
13969 #define elf_backend_want_got_plt 0
13971 #undef elf_backend_plt_sym_val
13972 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
13974 #undef elf_backend_may_use_rel_p
13975 #define elf_backend_may_use_rel_p 1
13976 #undef elf_backend_may_use_rela_p
13977 #define elf_backend_may_use_rela_p 0
13978 #undef elf_backend_default_use_rela_p
13979 #define elf_backend_default_use_rela_p 0
13980 #undef elf_backend_want_plt_sym
13981 #define elf_backend_want_plt_sym 0
13982 #undef ELF_MAXPAGESIZE
13983 #define ELF_MAXPAGESIZE 0x8000
13985 #include "elf32-target.h"