1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008, 2009, 2010 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "libiberty.h"
29 #include "elf-vxworks.h"
32 /* Return the relocation section associated with NAME. HTAB is the
33 bfd's elf32_arm_link_hash_entry. */
34 #define RELOC_SECTION(HTAB, NAME) \
35 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37 /* Return size of a relocation entry. HTAB is the bfd's
38 elf32_arm_link_hash_entry. */
39 #define RELOC_SIZE(HTAB) \
41 ? sizeof (Elf32_External_Rel) \
42 : sizeof (Elf32_External_Rela))
44 /* Return function to swap relocations in. HTAB is the bfd's
45 elf32_arm_link_hash_entry. */
46 #define SWAP_RELOC_IN(HTAB) \
48 ? bfd_elf32_swap_reloc_in \
49 : bfd_elf32_swap_reloca_in)
51 /* Return function to swap relocations out. HTAB is the bfd's
52 elf32_arm_link_hash_entry. */
53 #define SWAP_RELOC_OUT(HTAB) \
55 ? bfd_elf32_swap_reloc_out \
56 : bfd_elf32_swap_reloca_out)
58 #define elf_info_to_howto 0
59 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61 #define ARM_ELF_ABI_VERSION 0
62 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64 static bfd_boolean
elf32_arm_write_section (bfd
*output_bfd
,
65 struct bfd_link_info
*link_info
,
69 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
70 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
73 static reloc_howto_type elf32_arm_howto_table_1
[] =
76 HOWTO (R_ARM_NONE
, /* type */
78 0, /* size (0 = byte, 1 = short, 2 = long) */
80 FALSE
, /* pc_relative */
82 complain_overflow_dont
,/* complain_on_overflow */
83 bfd_elf_generic_reloc
, /* special_function */
84 "R_ARM_NONE", /* name */
85 FALSE
, /* partial_inplace */
88 FALSE
), /* pcrel_offset */
90 HOWTO (R_ARM_PC24
, /* type */
92 2, /* size (0 = byte, 1 = short, 2 = long) */
94 TRUE
, /* pc_relative */
96 complain_overflow_signed
,/* complain_on_overflow */
97 bfd_elf_generic_reloc
, /* special_function */
98 "R_ARM_PC24", /* name */
99 FALSE
, /* partial_inplace */
100 0x00ffffff, /* src_mask */
101 0x00ffffff, /* dst_mask */
102 TRUE
), /* pcrel_offset */
104 /* 32 bit absolute */
105 HOWTO (R_ARM_ABS32
, /* type */
107 2, /* size (0 = byte, 1 = short, 2 = long) */
109 FALSE
, /* pc_relative */
111 complain_overflow_bitfield
,/* complain_on_overflow */
112 bfd_elf_generic_reloc
, /* special_function */
113 "R_ARM_ABS32", /* name */
114 FALSE
, /* partial_inplace */
115 0xffffffff, /* src_mask */
116 0xffffffff, /* dst_mask */
117 FALSE
), /* pcrel_offset */
119 /* standard 32bit pc-relative reloc */
120 HOWTO (R_ARM_REL32
, /* type */
122 2, /* size (0 = byte, 1 = short, 2 = long) */
124 TRUE
, /* pc_relative */
126 complain_overflow_bitfield
,/* complain_on_overflow */
127 bfd_elf_generic_reloc
, /* special_function */
128 "R_ARM_REL32", /* name */
129 FALSE
, /* partial_inplace */
130 0xffffffff, /* src_mask */
131 0xffffffff, /* dst_mask */
132 TRUE
), /* pcrel_offset */
134 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
135 HOWTO (R_ARM_LDR_PC_G0
, /* type */
137 0, /* size (0 = byte, 1 = short, 2 = long) */
139 TRUE
, /* pc_relative */
141 complain_overflow_dont
,/* complain_on_overflow */
142 bfd_elf_generic_reloc
, /* special_function */
143 "R_ARM_LDR_PC_G0", /* name */
144 FALSE
, /* partial_inplace */
145 0xffffffff, /* src_mask */
146 0xffffffff, /* dst_mask */
147 TRUE
), /* pcrel_offset */
149 /* 16 bit absolute */
150 HOWTO (R_ARM_ABS16
, /* type */
152 1, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE
, /* pc_relative */
156 complain_overflow_bitfield
,/* complain_on_overflow */
157 bfd_elf_generic_reloc
, /* special_function */
158 "R_ARM_ABS16", /* name */
159 FALSE
, /* partial_inplace */
160 0x0000ffff, /* src_mask */
161 0x0000ffff, /* dst_mask */
162 FALSE
), /* pcrel_offset */
164 /* 12 bit absolute */
165 HOWTO (R_ARM_ABS12
, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 FALSE
, /* pc_relative */
171 complain_overflow_bitfield
,/* complain_on_overflow */
172 bfd_elf_generic_reloc
, /* special_function */
173 "R_ARM_ABS12", /* name */
174 FALSE
, /* partial_inplace */
175 0x00000fff, /* src_mask */
176 0x00000fff, /* dst_mask */
177 FALSE
), /* pcrel_offset */
179 HOWTO (R_ARM_THM_ABS5
, /* type */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
183 FALSE
, /* pc_relative */
185 complain_overflow_bitfield
,/* complain_on_overflow */
186 bfd_elf_generic_reloc
, /* special_function */
187 "R_ARM_THM_ABS5", /* name */
188 FALSE
, /* partial_inplace */
189 0x000007e0, /* src_mask */
190 0x000007e0, /* dst_mask */
191 FALSE
), /* pcrel_offset */
194 HOWTO (R_ARM_ABS8
, /* type */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
198 FALSE
, /* pc_relative */
200 complain_overflow_bitfield
,/* complain_on_overflow */
201 bfd_elf_generic_reloc
, /* special_function */
202 "R_ARM_ABS8", /* name */
203 FALSE
, /* partial_inplace */
204 0x000000ff, /* src_mask */
205 0x000000ff, /* dst_mask */
206 FALSE
), /* pcrel_offset */
208 HOWTO (R_ARM_SBREL32
, /* type */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
212 FALSE
, /* pc_relative */
214 complain_overflow_dont
,/* complain_on_overflow */
215 bfd_elf_generic_reloc
, /* special_function */
216 "R_ARM_SBREL32", /* name */
217 FALSE
, /* partial_inplace */
218 0xffffffff, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE
), /* pcrel_offset */
222 HOWTO (R_ARM_THM_CALL
, /* type */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
226 TRUE
, /* pc_relative */
228 complain_overflow_signed
,/* complain_on_overflow */
229 bfd_elf_generic_reloc
, /* special_function */
230 "R_ARM_THM_CALL", /* name */
231 FALSE
, /* partial_inplace */
232 0x07ff07ff, /* src_mask */
233 0x07ff07ff, /* dst_mask */
234 TRUE
), /* pcrel_offset */
236 HOWTO (R_ARM_THM_PC8
, /* type */
238 1, /* size (0 = byte, 1 = short, 2 = long) */
240 TRUE
, /* pc_relative */
242 complain_overflow_signed
,/* complain_on_overflow */
243 bfd_elf_generic_reloc
, /* special_function */
244 "R_ARM_THM_PC8", /* name */
245 FALSE
, /* partial_inplace */
246 0x000000ff, /* src_mask */
247 0x000000ff, /* dst_mask */
248 TRUE
), /* pcrel_offset */
250 HOWTO (R_ARM_BREL_ADJ
, /* type */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
254 FALSE
, /* pc_relative */
256 complain_overflow_signed
,/* complain_on_overflow */
257 bfd_elf_generic_reloc
, /* special_function */
258 "R_ARM_BREL_ADJ", /* name */
259 FALSE
, /* partial_inplace */
260 0xffffffff, /* src_mask */
261 0xffffffff, /* dst_mask */
262 FALSE
), /* pcrel_offset */
264 HOWTO (R_ARM_SWI24
, /* type */
266 0, /* size (0 = byte, 1 = short, 2 = long) */
268 FALSE
, /* pc_relative */
270 complain_overflow_signed
,/* complain_on_overflow */
271 bfd_elf_generic_reloc
, /* special_function */
272 "R_ARM_SWI24", /* name */
273 FALSE
, /* partial_inplace */
274 0x00000000, /* src_mask */
275 0x00000000, /* dst_mask */
276 FALSE
), /* pcrel_offset */
278 HOWTO (R_ARM_THM_SWI8
, /* type */
280 0, /* size (0 = byte, 1 = short, 2 = long) */
282 FALSE
, /* pc_relative */
284 complain_overflow_signed
,/* complain_on_overflow */
285 bfd_elf_generic_reloc
, /* special_function */
286 "R_ARM_SWI8", /* name */
287 FALSE
, /* partial_inplace */
288 0x00000000, /* src_mask */
289 0x00000000, /* dst_mask */
290 FALSE
), /* pcrel_offset */
292 /* BLX instruction for the ARM. */
293 HOWTO (R_ARM_XPC25
, /* type */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
297 TRUE
, /* pc_relative */
299 complain_overflow_signed
,/* complain_on_overflow */
300 bfd_elf_generic_reloc
, /* special_function */
301 "R_ARM_XPC25", /* name */
302 FALSE
, /* partial_inplace */
303 0x00ffffff, /* src_mask */
304 0x00ffffff, /* dst_mask */
305 TRUE
), /* pcrel_offset */
307 /* BLX instruction for the Thumb. */
308 HOWTO (R_ARM_THM_XPC22
, /* type */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
312 TRUE
, /* pc_relative */
314 complain_overflow_signed
,/* complain_on_overflow */
315 bfd_elf_generic_reloc
, /* special_function */
316 "R_ARM_THM_XPC22", /* name */
317 FALSE
, /* partial_inplace */
318 0x07ff07ff, /* src_mask */
319 0x07ff07ff, /* dst_mask */
320 TRUE
), /* pcrel_offset */
322 /* Dynamic TLS relocations. */
324 HOWTO (R_ARM_TLS_DTPMOD32
, /* type */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
328 FALSE
, /* pc_relative */
330 complain_overflow_bitfield
,/* complain_on_overflow */
331 bfd_elf_generic_reloc
, /* special_function */
332 "R_ARM_TLS_DTPMOD32", /* name */
333 TRUE
, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 FALSE
), /* pcrel_offset */
338 HOWTO (R_ARM_TLS_DTPOFF32
, /* type */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE
, /* pc_relative */
344 complain_overflow_bitfield
,/* complain_on_overflow */
345 bfd_elf_generic_reloc
, /* special_function */
346 "R_ARM_TLS_DTPOFF32", /* name */
347 TRUE
, /* partial_inplace */
348 0xffffffff, /* src_mask */
349 0xffffffff, /* dst_mask */
350 FALSE
), /* pcrel_offset */
352 HOWTO (R_ARM_TLS_TPOFF32
, /* type */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
356 FALSE
, /* pc_relative */
358 complain_overflow_bitfield
,/* complain_on_overflow */
359 bfd_elf_generic_reloc
, /* special_function */
360 "R_ARM_TLS_TPOFF32", /* name */
361 TRUE
, /* partial_inplace */
362 0xffffffff, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE
), /* pcrel_offset */
366 /* Relocs used in ARM Linux */
368 HOWTO (R_ARM_COPY
, /* type */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
372 FALSE
, /* pc_relative */
374 complain_overflow_bitfield
,/* complain_on_overflow */
375 bfd_elf_generic_reloc
, /* special_function */
376 "R_ARM_COPY", /* name */
377 TRUE
, /* partial_inplace */
378 0xffffffff, /* src_mask */
379 0xffffffff, /* dst_mask */
380 FALSE
), /* pcrel_offset */
382 HOWTO (R_ARM_GLOB_DAT
, /* type */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
386 FALSE
, /* pc_relative */
388 complain_overflow_bitfield
,/* complain_on_overflow */
389 bfd_elf_generic_reloc
, /* special_function */
390 "R_ARM_GLOB_DAT", /* name */
391 TRUE
, /* partial_inplace */
392 0xffffffff, /* src_mask */
393 0xffffffff, /* dst_mask */
394 FALSE
), /* pcrel_offset */
396 HOWTO (R_ARM_JUMP_SLOT
, /* type */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
400 FALSE
, /* pc_relative */
402 complain_overflow_bitfield
,/* complain_on_overflow */
403 bfd_elf_generic_reloc
, /* special_function */
404 "R_ARM_JUMP_SLOT", /* name */
405 TRUE
, /* partial_inplace */
406 0xffffffff, /* src_mask */
407 0xffffffff, /* dst_mask */
408 FALSE
), /* pcrel_offset */
410 HOWTO (R_ARM_RELATIVE
, /* type */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
414 FALSE
, /* pc_relative */
416 complain_overflow_bitfield
,/* complain_on_overflow */
417 bfd_elf_generic_reloc
, /* special_function */
418 "R_ARM_RELATIVE", /* name */
419 TRUE
, /* partial_inplace */
420 0xffffffff, /* src_mask */
421 0xffffffff, /* dst_mask */
422 FALSE
), /* pcrel_offset */
424 HOWTO (R_ARM_GOTOFF32
, /* type */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
428 FALSE
, /* pc_relative */
430 complain_overflow_bitfield
,/* complain_on_overflow */
431 bfd_elf_generic_reloc
, /* special_function */
432 "R_ARM_GOTOFF32", /* name */
433 TRUE
, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 FALSE
), /* pcrel_offset */
438 HOWTO (R_ARM_GOTPC
, /* type */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
442 TRUE
, /* pc_relative */
444 complain_overflow_bitfield
,/* complain_on_overflow */
445 bfd_elf_generic_reloc
, /* special_function */
446 "R_ARM_GOTPC", /* name */
447 TRUE
, /* partial_inplace */
448 0xffffffff, /* src_mask */
449 0xffffffff, /* dst_mask */
450 TRUE
), /* pcrel_offset */
452 HOWTO (R_ARM_GOT32
, /* type */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE
, /* pc_relative */
458 complain_overflow_bitfield
,/* complain_on_overflow */
459 bfd_elf_generic_reloc
, /* special_function */
460 "R_ARM_GOT32", /* name */
461 TRUE
, /* partial_inplace */
462 0xffffffff, /* src_mask */
463 0xffffffff, /* dst_mask */
464 FALSE
), /* pcrel_offset */
466 HOWTO (R_ARM_PLT32
, /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 TRUE
, /* pc_relative */
472 complain_overflow_bitfield
,/* complain_on_overflow */
473 bfd_elf_generic_reloc
, /* special_function */
474 "R_ARM_PLT32", /* name */
475 FALSE
, /* partial_inplace */
476 0x00ffffff, /* src_mask */
477 0x00ffffff, /* dst_mask */
478 TRUE
), /* pcrel_offset */
480 HOWTO (R_ARM_CALL
, /* type */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
484 TRUE
, /* pc_relative */
486 complain_overflow_signed
,/* complain_on_overflow */
487 bfd_elf_generic_reloc
, /* special_function */
488 "R_ARM_CALL", /* name */
489 FALSE
, /* partial_inplace */
490 0x00ffffff, /* src_mask */
491 0x00ffffff, /* dst_mask */
492 TRUE
), /* pcrel_offset */
494 HOWTO (R_ARM_JUMP24
, /* type */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
498 TRUE
, /* pc_relative */
500 complain_overflow_signed
,/* complain_on_overflow */
501 bfd_elf_generic_reloc
, /* special_function */
502 "R_ARM_JUMP24", /* name */
503 FALSE
, /* partial_inplace */
504 0x00ffffff, /* src_mask */
505 0x00ffffff, /* dst_mask */
506 TRUE
), /* pcrel_offset */
508 HOWTO (R_ARM_THM_JUMP24
, /* type */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
512 TRUE
, /* pc_relative */
514 complain_overflow_signed
,/* complain_on_overflow */
515 bfd_elf_generic_reloc
, /* special_function */
516 "R_ARM_THM_JUMP24", /* name */
517 FALSE
, /* partial_inplace */
518 0x07ff2fff, /* src_mask */
519 0x07ff2fff, /* dst_mask */
520 TRUE
), /* pcrel_offset */
522 HOWTO (R_ARM_BASE_ABS
, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 FALSE
, /* pc_relative */
528 complain_overflow_dont
,/* complain_on_overflow */
529 bfd_elf_generic_reloc
, /* special_function */
530 "R_ARM_BASE_ABS", /* name */
531 FALSE
, /* partial_inplace */
532 0xffffffff, /* src_mask */
533 0xffffffff, /* dst_mask */
534 FALSE
), /* pcrel_offset */
536 HOWTO (R_ARM_ALU_PCREL7_0
, /* type */
538 2, /* size (0 = byte, 1 = short, 2 = long) */
540 TRUE
, /* pc_relative */
542 complain_overflow_dont
,/* complain_on_overflow */
543 bfd_elf_generic_reloc
, /* special_function */
544 "R_ARM_ALU_PCREL_7_0", /* name */
545 FALSE
, /* partial_inplace */
546 0x00000fff, /* src_mask */
547 0x00000fff, /* dst_mask */
548 TRUE
), /* pcrel_offset */
550 HOWTO (R_ARM_ALU_PCREL15_8
, /* type */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
554 TRUE
, /* pc_relative */
556 complain_overflow_dont
,/* complain_on_overflow */
557 bfd_elf_generic_reloc
, /* special_function */
558 "R_ARM_ALU_PCREL_15_8",/* name */
559 FALSE
, /* partial_inplace */
560 0x00000fff, /* src_mask */
561 0x00000fff, /* dst_mask */
562 TRUE
), /* pcrel_offset */
564 HOWTO (R_ARM_ALU_PCREL23_15
, /* type */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
568 TRUE
, /* pc_relative */
570 complain_overflow_dont
,/* complain_on_overflow */
571 bfd_elf_generic_reloc
, /* special_function */
572 "R_ARM_ALU_PCREL_23_15",/* name */
573 FALSE
, /* partial_inplace */
574 0x00000fff, /* src_mask */
575 0x00000fff, /* dst_mask */
576 TRUE
), /* pcrel_offset */
578 HOWTO (R_ARM_LDR_SBREL_11_0
, /* type */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
582 FALSE
, /* pc_relative */
584 complain_overflow_dont
,/* complain_on_overflow */
585 bfd_elf_generic_reloc
, /* special_function */
586 "R_ARM_LDR_SBREL_11_0",/* name */
587 FALSE
, /* partial_inplace */
588 0x00000fff, /* src_mask */
589 0x00000fff, /* dst_mask */
590 FALSE
), /* pcrel_offset */
592 HOWTO (R_ARM_ALU_SBREL_19_12
, /* type */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
596 FALSE
, /* pc_relative */
598 complain_overflow_dont
,/* complain_on_overflow */
599 bfd_elf_generic_reloc
, /* special_function */
600 "R_ARM_ALU_SBREL_19_12",/* name */
601 FALSE
, /* partial_inplace */
602 0x000ff000, /* src_mask */
603 0x000ff000, /* dst_mask */
604 FALSE
), /* pcrel_offset */
606 HOWTO (R_ARM_ALU_SBREL_27_20
, /* type */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
610 FALSE
, /* pc_relative */
612 complain_overflow_dont
,/* complain_on_overflow */
613 bfd_elf_generic_reloc
, /* special_function */
614 "R_ARM_ALU_SBREL_27_20",/* name */
615 FALSE
, /* partial_inplace */
616 0x0ff00000, /* src_mask */
617 0x0ff00000, /* dst_mask */
618 FALSE
), /* pcrel_offset */
620 HOWTO (R_ARM_TARGET1
, /* type */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
624 FALSE
, /* pc_relative */
626 complain_overflow_dont
,/* complain_on_overflow */
627 bfd_elf_generic_reloc
, /* special_function */
628 "R_ARM_TARGET1", /* name */
629 FALSE
, /* partial_inplace */
630 0xffffffff, /* src_mask */
631 0xffffffff, /* dst_mask */
632 FALSE
), /* pcrel_offset */
634 HOWTO (R_ARM_ROSEGREL32
, /* type */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
638 FALSE
, /* pc_relative */
640 complain_overflow_dont
,/* complain_on_overflow */
641 bfd_elf_generic_reloc
, /* special_function */
642 "R_ARM_ROSEGREL32", /* name */
643 FALSE
, /* partial_inplace */
644 0xffffffff, /* src_mask */
645 0xffffffff, /* dst_mask */
646 FALSE
), /* pcrel_offset */
648 HOWTO (R_ARM_V4BX
, /* type */
650 2, /* size (0 = byte, 1 = short, 2 = long) */
652 FALSE
, /* pc_relative */
654 complain_overflow_dont
,/* complain_on_overflow */
655 bfd_elf_generic_reloc
, /* special_function */
656 "R_ARM_V4BX", /* name */
657 FALSE
, /* partial_inplace */
658 0xffffffff, /* src_mask */
659 0xffffffff, /* dst_mask */
660 FALSE
), /* pcrel_offset */
662 HOWTO (R_ARM_TARGET2
, /* type */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
666 FALSE
, /* pc_relative */
668 complain_overflow_signed
,/* complain_on_overflow */
669 bfd_elf_generic_reloc
, /* special_function */
670 "R_ARM_TARGET2", /* name */
671 FALSE
, /* partial_inplace */
672 0xffffffff, /* src_mask */
673 0xffffffff, /* dst_mask */
674 TRUE
), /* pcrel_offset */
676 HOWTO (R_ARM_PREL31
, /* type */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
680 TRUE
, /* pc_relative */
682 complain_overflow_signed
,/* complain_on_overflow */
683 bfd_elf_generic_reloc
, /* special_function */
684 "R_ARM_PREL31", /* name */
685 FALSE
, /* partial_inplace */
686 0x7fffffff, /* src_mask */
687 0x7fffffff, /* dst_mask */
688 TRUE
), /* pcrel_offset */
690 HOWTO (R_ARM_MOVW_ABS_NC
, /* type */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
694 FALSE
, /* pc_relative */
696 complain_overflow_dont
,/* complain_on_overflow */
697 bfd_elf_generic_reloc
, /* special_function */
698 "R_ARM_MOVW_ABS_NC", /* name */
699 FALSE
, /* partial_inplace */
700 0x000f0fff, /* src_mask */
701 0x000f0fff, /* dst_mask */
702 FALSE
), /* pcrel_offset */
704 HOWTO (R_ARM_MOVT_ABS
, /* type */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
708 FALSE
, /* pc_relative */
710 complain_overflow_bitfield
,/* complain_on_overflow */
711 bfd_elf_generic_reloc
, /* special_function */
712 "R_ARM_MOVT_ABS", /* name */
713 FALSE
, /* partial_inplace */
714 0x000f0fff, /* src_mask */
715 0x000f0fff, /* dst_mask */
716 FALSE
), /* pcrel_offset */
718 HOWTO (R_ARM_MOVW_PREL_NC
, /* type */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
722 TRUE
, /* pc_relative */
724 complain_overflow_dont
,/* complain_on_overflow */
725 bfd_elf_generic_reloc
, /* special_function */
726 "R_ARM_MOVW_PREL_NC", /* name */
727 FALSE
, /* partial_inplace */
728 0x000f0fff, /* src_mask */
729 0x000f0fff, /* dst_mask */
730 TRUE
), /* pcrel_offset */
732 HOWTO (R_ARM_MOVT_PREL
, /* type */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
736 TRUE
, /* pc_relative */
738 complain_overflow_bitfield
,/* complain_on_overflow */
739 bfd_elf_generic_reloc
, /* special_function */
740 "R_ARM_MOVT_PREL", /* name */
741 FALSE
, /* partial_inplace */
742 0x000f0fff, /* src_mask */
743 0x000f0fff, /* dst_mask */
744 TRUE
), /* pcrel_offset */
746 HOWTO (R_ARM_THM_MOVW_ABS_NC
, /* type */
748 2, /* size (0 = byte, 1 = short, 2 = long) */
750 FALSE
, /* pc_relative */
752 complain_overflow_dont
,/* complain_on_overflow */
753 bfd_elf_generic_reloc
, /* special_function */
754 "R_ARM_THM_MOVW_ABS_NC",/* name */
755 FALSE
, /* partial_inplace */
756 0x040f70ff, /* src_mask */
757 0x040f70ff, /* dst_mask */
758 FALSE
), /* pcrel_offset */
760 HOWTO (R_ARM_THM_MOVT_ABS
, /* type */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
764 FALSE
, /* pc_relative */
766 complain_overflow_bitfield
,/* complain_on_overflow */
767 bfd_elf_generic_reloc
, /* special_function */
768 "R_ARM_THM_MOVT_ABS", /* name */
769 FALSE
, /* partial_inplace */
770 0x040f70ff, /* src_mask */
771 0x040f70ff, /* dst_mask */
772 FALSE
), /* pcrel_offset */
774 HOWTO (R_ARM_THM_MOVW_PREL_NC
,/* type */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
778 TRUE
, /* pc_relative */
780 complain_overflow_dont
,/* complain_on_overflow */
781 bfd_elf_generic_reloc
, /* special_function */
782 "R_ARM_THM_MOVW_PREL_NC",/* name */
783 FALSE
, /* partial_inplace */
784 0x040f70ff, /* src_mask */
785 0x040f70ff, /* dst_mask */
786 TRUE
), /* pcrel_offset */
788 HOWTO (R_ARM_THM_MOVT_PREL
, /* type */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
792 TRUE
, /* pc_relative */
794 complain_overflow_bitfield
,/* complain_on_overflow */
795 bfd_elf_generic_reloc
, /* special_function */
796 "R_ARM_THM_MOVT_PREL", /* name */
797 FALSE
, /* partial_inplace */
798 0x040f70ff, /* src_mask */
799 0x040f70ff, /* dst_mask */
800 TRUE
), /* pcrel_offset */
802 HOWTO (R_ARM_THM_JUMP19
, /* type */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
806 TRUE
, /* pc_relative */
808 complain_overflow_signed
,/* complain_on_overflow */
809 bfd_elf_generic_reloc
, /* special_function */
810 "R_ARM_THM_JUMP19", /* name */
811 FALSE
, /* partial_inplace */
812 0x043f2fff, /* src_mask */
813 0x043f2fff, /* dst_mask */
814 TRUE
), /* pcrel_offset */
816 HOWTO (R_ARM_THM_JUMP6
, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 TRUE
, /* pc_relative */
822 complain_overflow_unsigned
,/* complain_on_overflow */
823 bfd_elf_generic_reloc
, /* special_function */
824 "R_ARM_THM_JUMP6", /* name */
825 FALSE
, /* partial_inplace */
826 0x02f8, /* src_mask */
827 0x02f8, /* dst_mask */
828 TRUE
), /* pcrel_offset */
830 /* These are declared as 13-bit signed relocations because we can
831 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
833 HOWTO (R_ARM_THM_ALU_PREL_11_0
,/* type */
835 2, /* size (0 = byte, 1 = short, 2 = long) */
837 TRUE
, /* pc_relative */
839 complain_overflow_dont
,/* complain_on_overflow */
840 bfd_elf_generic_reloc
, /* special_function */
841 "R_ARM_THM_ALU_PREL_11_0",/* name */
842 FALSE
, /* partial_inplace */
843 0xffffffff, /* src_mask */
844 0xffffffff, /* dst_mask */
845 TRUE
), /* pcrel_offset */
847 HOWTO (R_ARM_THM_PC12
, /* type */
849 2, /* size (0 = byte, 1 = short, 2 = long) */
851 TRUE
, /* pc_relative */
853 complain_overflow_dont
,/* complain_on_overflow */
854 bfd_elf_generic_reloc
, /* special_function */
855 "R_ARM_THM_PC12", /* name */
856 FALSE
, /* partial_inplace */
857 0xffffffff, /* src_mask */
858 0xffffffff, /* dst_mask */
859 TRUE
), /* pcrel_offset */
861 HOWTO (R_ARM_ABS32_NOI
, /* type */
863 2, /* size (0 = byte, 1 = short, 2 = long) */
865 FALSE
, /* pc_relative */
867 complain_overflow_dont
,/* complain_on_overflow */
868 bfd_elf_generic_reloc
, /* special_function */
869 "R_ARM_ABS32_NOI", /* name */
870 FALSE
, /* partial_inplace */
871 0xffffffff, /* src_mask */
872 0xffffffff, /* dst_mask */
873 FALSE
), /* pcrel_offset */
875 HOWTO (R_ARM_REL32_NOI
, /* type */
877 2, /* size (0 = byte, 1 = short, 2 = long) */
879 TRUE
, /* pc_relative */
881 complain_overflow_dont
,/* complain_on_overflow */
882 bfd_elf_generic_reloc
, /* special_function */
883 "R_ARM_REL32_NOI", /* name */
884 FALSE
, /* partial_inplace */
885 0xffffffff, /* src_mask */
886 0xffffffff, /* dst_mask */
887 FALSE
), /* pcrel_offset */
889 /* Group relocations. */
891 HOWTO (R_ARM_ALU_PC_G0_NC
, /* type */
893 2, /* size (0 = byte, 1 = short, 2 = long) */
895 TRUE
, /* pc_relative */
897 complain_overflow_dont
,/* complain_on_overflow */
898 bfd_elf_generic_reloc
, /* special_function */
899 "R_ARM_ALU_PC_G0_NC", /* name */
900 FALSE
, /* partial_inplace */
901 0xffffffff, /* src_mask */
902 0xffffffff, /* dst_mask */
903 TRUE
), /* pcrel_offset */
905 HOWTO (R_ARM_ALU_PC_G0
, /* type */
907 2, /* size (0 = byte, 1 = short, 2 = long) */
909 TRUE
, /* pc_relative */
911 complain_overflow_dont
,/* complain_on_overflow */
912 bfd_elf_generic_reloc
, /* special_function */
913 "R_ARM_ALU_PC_G0", /* name */
914 FALSE
, /* partial_inplace */
915 0xffffffff, /* src_mask */
916 0xffffffff, /* dst_mask */
917 TRUE
), /* pcrel_offset */
919 HOWTO (R_ARM_ALU_PC_G1_NC
, /* type */
921 2, /* size (0 = byte, 1 = short, 2 = long) */
923 TRUE
, /* pc_relative */
925 complain_overflow_dont
,/* complain_on_overflow */
926 bfd_elf_generic_reloc
, /* special_function */
927 "R_ARM_ALU_PC_G1_NC", /* name */
928 FALSE
, /* partial_inplace */
929 0xffffffff, /* src_mask */
930 0xffffffff, /* dst_mask */
931 TRUE
), /* pcrel_offset */
933 HOWTO (R_ARM_ALU_PC_G1
, /* type */
935 2, /* size (0 = byte, 1 = short, 2 = long) */
937 TRUE
, /* pc_relative */
939 complain_overflow_dont
,/* complain_on_overflow */
940 bfd_elf_generic_reloc
, /* special_function */
941 "R_ARM_ALU_PC_G1", /* name */
942 FALSE
, /* partial_inplace */
943 0xffffffff, /* src_mask */
944 0xffffffff, /* dst_mask */
945 TRUE
), /* pcrel_offset */
947 HOWTO (R_ARM_ALU_PC_G2
, /* type */
949 2, /* size (0 = byte, 1 = short, 2 = long) */
951 TRUE
, /* pc_relative */
953 complain_overflow_dont
,/* complain_on_overflow */
954 bfd_elf_generic_reloc
, /* special_function */
955 "R_ARM_ALU_PC_G2", /* name */
956 FALSE
, /* partial_inplace */
957 0xffffffff, /* src_mask */
958 0xffffffff, /* dst_mask */
959 TRUE
), /* pcrel_offset */
961 HOWTO (R_ARM_LDR_PC_G1
, /* type */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
965 TRUE
, /* pc_relative */
967 complain_overflow_dont
,/* complain_on_overflow */
968 bfd_elf_generic_reloc
, /* special_function */
969 "R_ARM_LDR_PC_G1", /* name */
970 FALSE
, /* partial_inplace */
971 0xffffffff, /* src_mask */
972 0xffffffff, /* dst_mask */
973 TRUE
), /* pcrel_offset */
975 HOWTO (R_ARM_LDR_PC_G2
, /* type */
977 2, /* size (0 = byte, 1 = short, 2 = long) */
979 TRUE
, /* pc_relative */
981 complain_overflow_dont
,/* complain_on_overflow */
982 bfd_elf_generic_reloc
, /* special_function */
983 "R_ARM_LDR_PC_G2", /* name */
984 FALSE
, /* partial_inplace */
985 0xffffffff, /* src_mask */
986 0xffffffff, /* dst_mask */
987 TRUE
), /* pcrel_offset */
989 HOWTO (R_ARM_LDRS_PC_G0
, /* type */
991 2, /* size (0 = byte, 1 = short, 2 = long) */
993 TRUE
, /* pc_relative */
995 complain_overflow_dont
,/* complain_on_overflow */
996 bfd_elf_generic_reloc
, /* special_function */
997 "R_ARM_LDRS_PC_G0", /* name */
998 FALSE
, /* partial_inplace */
999 0xffffffff, /* src_mask */
1000 0xffffffff, /* dst_mask */
1001 TRUE
), /* pcrel_offset */
1003 HOWTO (R_ARM_LDRS_PC_G1
, /* type */
1005 2, /* size (0 = byte, 1 = short, 2 = long) */
1007 TRUE
, /* pc_relative */
1009 complain_overflow_dont
,/* complain_on_overflow */
1010 bfd_elf_generic_reloc
, /* special_function */
1011 "R_ARM_LDRS_PC_G1", /* name */
1012 FALSE
, /* partial_inplace */
1013 0xffffffff, /* src_mask */
1014 0xffffffff, /* dst_mask */
1015 TRUE
), /* pcrel_offset */
1017 HOWTO (R_ARM_LDRS_PC_G2
, /* type */
1019 2, /* size (0 = byte, 1 = short, 2 = long) */
1021 TRUE
, /* pc_relative */
1023 complain_overflow_dont
,/* complain_on_overflow */
1024 bfd_elf_generic_reloc
, /* special_function */
1025 "R_ARM_LDRS_PC_G2", /* name */
1026 FALSE
, /* partial_inplace */
1027 0xffffffff, /* src_mask */
1028 0xffffffff, /* dst_mask */
1029 TRUE
), /* pcrel_offset */
1031 HOWTO (R_ARM_LDC_PC_G0
, /* type */
1033 2, /* size (0 = byte, 1 = short, 2 = long) */
1035 TRUE
, /* pc_relative */
1037 complain_overflow_dont
,/* complain_on_overflow */
1038 bfd_elf_generic_reloc
, /* special_function */
1039 "R_ARM_LDC_PC_G0", /* name */
1040 FALSE
, /* partial_inplace */
1041 0xffffffff, /* src_mask */
1042 0xffffffff, /* dst_mask */
1043 TRUE
), /* pcrel_offset */
1045 HOWTO (R_ARM_LDC_PC_G1
, /* type */
1047 2, /* size (0 = byte, 1 = short, 2 = long) */
1049 TRUE
, /* pc_relative */
1051 complain_overflow_dont
,/* complain_on_overflow */
1052 bfd_elf_generic_reloc
, /* special_function */
1053 "R_ARM_LDC_PC_G1", /* name */
1054 FALSE
, /* partial_inplace */
1055 0xffffffff, /* src_mask */
1056 0xffffffff, /* dst_mask */
1057 TRUE
), /* pcrel_offset */
1059 HOWTO (R_ARM_LDC_PC_G2
, /* type */
1061 2, /* size (0 = byte, 1 = short, 2 = long) */
1063 TRUE
, /* pc_relative */
1065 complain_overflow_dont
,/* complain_on_overflow */
1066 bfd_elf_generic_reloc
, /* special_function */
1067 "R_ARM_LDC_PC_G2", /* name */
1068 FALSE
, /* partial_inplace */
1069 0xffffffff, /* src_mask */
1070 0xffffffff, /* dst_mask */
1071 TRUE
), /* pcrel_offset */
1073 HOWTO (R_ARM_ALU_SB_G0_NC
, /* type */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1077 TRUE
, /* pc_relative */
1079 complain_overflow_dont
,/* complain_on_overflow */
1080 bfd_elf_generic_reloc
, /* special_function */
1081 "R_ARM_ALU_SB_G0_NC", /* name */
1082 FALSE
, /* partial_inplace */
1083 0xffffffff, /* src_mask */
1084 0xffffffff, /* dst_mask */
1085 TRUE
), /* pcrel_offset */
1087 HOWTO (R_ARM_ALU_SB_G0
, /* type */
1089 2, /* size (0 = byte, 1 = short, 2 = long) */
1091 TRUE
, /* pc_relative */
1093 complain_overflow_dont
,/* complain_on_overflow */
1094 bfd_elf_generic_reloc
, /* special_function */
1095 "R_ARM_ALU_SB_G0", /* name */
1096 FALSE
, /* partial_inplace */
1097 0xffffffff, /* src_mask */
1098 0xffffffff, /* dst_mask */
1099 TRUE
), /* pcrel_offset */
1101 HOWTO (R_ARM_ALU_SB_G1_NC
, /* type */
1103 2, /* size (0 = byte, 1 = short, 2 = long) */
1105 TRUE
, /* pc_relative */
1107 complain_overflow_dont
,/* complain_on_overflow */
1108 bfd_elf_generic_reloc
, /* special_function */
1109 "R_ARM_ALU_SB_G1_NC", /* name */
1110 FALSE
, /* partial_inplace */
1111 0xffffffff, /* src_mask */
1112 0xffffffff, /* dst_mask */
1113 TRUE
), /* pcrel_offset */
1115 HOWTO (R_ARM_ALU_SB_G1
, /* type */
1117 2, /* size (0 = byte, 1 = short, 2 = long) */
1119 TRUE
, /* pc_relative */
1121 complain_overflow_dont
,/* complain_on_overflow */
1122 bfd_elf_generic_reloc
, /* special_function */
1123 "R_ARM_ALU_SB_G1", /* name */
1124 FALSE
, /* partial_inplace */
1125 0xffffffff, /* src_mask */
1126 0xffffffff, /* dst_mask */
1127 TRUE
), /* pcrel_offset */
1129 HOWTO (R_ARM_ALU_SB_G2
, /* type */
1131 2, /* size (0 = byte, 1 = short, 2 = long) */
1133 TRUE
, /* pc_relative */
1135 complain_overflow_dont
,/* complain_on_overflow */
1136 bfd_elf_generic_reloc
, /* special_function */
1137 "R_ARM_ALU_SB_G2", /* name */
1138 FALSE
, /* partial_inplace */
1139 0xffffffff, /* src_mask */
1140 0xffffffff, /* dst_mask */
1141 TRUE
), /* pcrel_offset */
1143 HOWTO (R_ARM_LDR_SB_G0
, /* type */
1145 2, /* size (0 = byte, 1 = short, 2 = long) */
1147 TRUE
, /* pc_relative */
1149 complain_overflow_dont
,/* complain_on_overflow */
1150 bfd_elf_generic_reloc
, /* special_function */
1151 "R_ARM_LDR_SB_G0", /* name */
1152 FALSE
, /* partial_inplace */
1153 0xffffffff, /* src_mask */
1154 0xffffffff, /* dst_mask */
1155 TRUE
), /* pcrel_offset */
1157 HOWTO (R_ARM_LDR_SB_G1
, /* type */
1159 2, /* size (0 = byte, 1 = short, 2 = long) */
1161 TRUE
, /* pc_relative */
1163 complain_overflow_dont
,/* complain_on_overflow */
1164 bfd_elf_generic_reloc
, /* special_function */
1165 "R_ARM_LDR_SB_G1", /* name */
1166 FALSE
, /* partial_inplace */
1167 0xffffffff, /* src_mask */
1168 0xffffffff, /* dst_mask */
1169 TRUE
), /* pcrel_offset */
1171 HOWTO (R_ARM_LDR_SB_G2
, /* type */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1175 TRUE
, /* pc_relative */
1177 complain_overflow_dont
,/* complain_on_overflow */
1178 bfd_elf_generic_reloc
, /* special_function */
1179 "R_ARM_LDR_SB_G2", /* name */
1180 FALSE
, /* partial_inplace */
1181 0xffffffff, /* src_mask */
1182 0xffffffff, /* dst_mask */
1183 TRUE
), /* pcrel_offset */
1185 HOWTO (R_ARM_LDRS_SB_G0
, /* type */
1187 2, /* size (0 = byte, 1 = short, 2 = long) */
1189 TRUE
, /* pc_relative */
1191 complain_overflow_dont
,/* complain_on_overflow */
1192 bfd_elf_generic_reloc
, /* special_function */
1193 "R_ARM_LDRS_SB_G0", /* name */
1194 FALSE
, /* partial_inplace */
1195 0xffffffff, /* src_mask */
1196 0xffffffff, /* dst_mask */
1197 TRUE
), /* pcrel_offset */
1199 HOWTO (R_ARM_LDRS_SB_G1
, /* type */
1201 2, /* size (0 = byte, 1 = short, 2 = long) */
1203 TRUE
, /* pc_relative */
1205 complain_overflow_dont
,/* complain_on_overflow */
1206 bfd_elf_generic_reloc
, /* special_function */
1207 "R_ARM_LDRS_SB_G1", /* name */
1208 FALSE
, /* partial_inplace */
1209 0xffffffff, /* src_mask */
1210 0xffffffff, /* dst_mask */
1211 TRUE
), /* pcrel_offset */
1213 HOWTO (R_ARM_LDRS_SB_G2
, /* type */
1215 2, /* size (0 = byte, 1 = short, 2 = long) */
1217 TRUE
, /* pc_relative */
1219 complain_overflow_dont
,/* complain_on_overflow */
1220 bfd_elf_generic_reloc
, /* special_function */
1221 "R_ARM_LDRS_SB_G2", /* name */
1222 FALSE
, /* partial_inplace */
1223 0xffffffff, /* src_mask */
1224 0xffffffff, /* dst_mask */
1225 TRUE
), /* pcrel_offset */
1227 HOWTO (R_ARM_LDC_SB_G0
, /* type */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1231 TRUE
, /* pc_relative */
1233 complain_overflow_dont
,/* complain_on_overflow */
1234 bfd_elf_generic_reloc
, /* special_function */
1235 "R_ARM_LDC_SB_G0", /* name */
1236 FALSE
, /* partial_inplace */
1237 0xffffffff, /* src_mask */
1238 0xffffffff, /* dst_mask */
1239 TRUE
), /* pcrel_offset */
1241 HOWTO (R_ARM_LDC_SB_G1
, /* type */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1245 TRUE
, /* pc_relative */
1247 complain_overflow_dont
,/* complain_on_overflow */
1248 bfd_elf_generic_reloc
, /* special_function */
1249 "R_ARM_LDC_SB_G1", /* name */
1250 FALSE
, /* partial_inplace */
1251 0xffffffff, /* src_mask */
1252 0xffffffff, /* dst_mask */
1253 TRUE
), /* pcrel_offset */
1255 HOWTO (R_ARM_LDC_SB_G2
, /* type */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1259 TRUE
, /* pc_relative */
1261 complain_overflow_dont
,/* complain_on_overflow */
1262 bfd_elf_generic_reloc
, /* special_function */
1263 "R_ARM_LDC_SB_G2", /* name */
1264 FALSE
, /* partial_inplace */
1265 0xffffffff, /* src_mask */
1266 0xffffffff, /* dst_mask */
1267 TRUE
), /* pcrel_offset */
1269 /* End of group relocations. */
1271 HOWTO (R_ARM_MOVW_BREL_NC
, /* type */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1275 FALSE
, /* pc_relative */
1277 complain_overflow_dont
,/* complain_on_overflow */
1278 bfd_elf_generic_reloc
, /* special_function */
1279 "R_ARM_MOVW_BREL_NC", /* name */
1280 FALSE
, /* partial_inplace */
1281 0x0000ffff, /* src_mask */
1282 0x0000ffff, /* dst_mask */
1283 FALSE
), /* pcrel_offset */
1285 HOWTO (R_ARM_MOVT_BREL
, /* type */
1287 2, /* size (0 = byte, 1 = short, 2 = long) */
1289 FALSE
, /* pc_relative */
1291 complain_overflow_bitfield
,/* complain_on_overflow */
1292 bfd_elf_generic_reloc
, /* special_function */
1293 "R_ARM_MOVT_BREL", /* name */
1294 FALSE
, /* partial_inplace */
1295 0x0000ffff, /* src_mask */
1296 0x0000ffff, /* dst_mask */
1297 FALSE
), /* pcrel_offset */
1299 HOWTO (R_ARM_MOVW_BREL
, /* type */
1301 2, /* size (0 = byte, 1 = short, 2 = long) */
1303 FALSE
, /* pc_relative */
1305 complain_overflow_dont
,/* complain_on_overflow */
1306 bfd_elf_generic_reloc
, /* special_function */
1307 "R_ARM_MOVW_BREL", /* name */
1308 FALSE
, /* partial_inplace */
1309 0x0000ffff, /* src_mask */
1310 0x0000ffff, /* dst_mask */
1311 FALSE
), /* pcrel_offset */
1313 HOWTO (R_ARM_THM_MOVW_BREL_NC
,/* type */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1317 FALSE
, /* pc_relative */
1319 complain_overflow_dont
,/* complain_on_overflow */
1320 bfd_elf_generic_reloc
, /* special_function */
1321 "R_ARM_THM_MOVW_BREL_NC",/* name */
1322 FALSE
, /* partial_inplace */
1323 0x040f70ff, /* src_mask */
1324 0x040f70ff, /* dst_mask */
1325 FALSE
), /* pcrel_offset */
1327 HOWTO (R_ARM_THM_MOVT_BREL
, /* type */
1329 2, /* size (0 = byte, 1 = short, 2 = long) */
1331 FALSE
, /* pc_relative */
1333 complain_overflow_bitfield
,/* complain_on_overflow */
1334 bfd_elf_generic_reloc
, /* special_function */
1335 "R_ARM_THM_MOVT_BREL", /* name */
1336 FALSE
, /* partial_inplace */
1337 0x040f70ff, /* src_mask */
1338 0x040f70ff, /* dst_mask */
1339 FALSE
), /* pcrel_offset */
1341 HOWTO (R_ARM_THM_MOVW_BREL
, /* type */
1343 2, /* size (0 = byte, 1 = short, 2 = long) */
1345 FALSE
, /* pc_relative */
1347 complain_overflow_dont
,/* complain_on_overflow */
1348 bfd_elf_generic_reloc
, /* special_function */
1349 "R_ARM_THM_MOVW_BREL", /* name */
1350 FALSE
, /* partial_inplace */
1351 0x040f70ff, /* src_mask */
1352 0x040f70ff, /* dst_mask */
1353 FALSE
), /* pcrel_offset */
1355 EMPTY_HOWTO (90), /* Unallocated. */
1360 HOWTO (R_ARM_PLT32_ABS
, /* type */
1362 2, /* size (0 = byte, 1 = short, 2 = long) */
1364 FALSE
, /* pc_relative */
1366 complain_overflow_dont
,/* complain_on_overflow */
1367 bfd_elf_generic_reloc
, /* special_function */
1368 "R_ARM_PLT32_ABS", /* name */
1369 FALSE
, /* partial_inplace */
1370 0xffffffff, /* src_mask */
1371 0xffffffff, /* dst_mask */
1372 FALSE
), /* pcrel_offset */
1374 HOWTO (R_ARM_GOT_ABS
, /* type */
1376 2, /* size (0 = byte, 1 = short, 2 = long) */
1378 FALSE
, /* pc_relative */
1380 complain_overflow_dont
,/* complain_on_overflow */
1381 bfd_elf_generic_reloc
, /* special_function */
1382 "R_ARM_GOT_ABS", /* name */
1383 FALSE
, /* partial_inplace */
1384 0xffffffff, /* src_mask */
1385 0xffffffff, /* dst_mask */
1386 FALSE
), /* pcrel_offset */
1388 HOWTO (R_ARM_GOT_PREL
, /* type */
1390 2, /* size (0 = byte, 1 = short, 2 = long) */
1392 TRUE
, /* pc_relative */
1394 complain_overflow_dont
, /* complain_on_overflow */
1395 bfd_elf_generic_reloc
, /* special_function */
1396 "R_ARM_GOT_PREL", /* name */
1397 FALSE
, /* partial_inplace */
1398 0xffffffff, /* src_mask */
1399 0xffffffff, /* dst_mask */
1400 TRUE
), /* pcrel_offset */
1402 HOWTO (R_ARM_GOT_BREL12
, /* type */
1404 2, /* size (0 = byte, 1 = short, 2 = long) */
1406 FALSE
, /* pc_relative */
1408 complain_overflow_bitfield
,/* complain_on_overflow */
1409 bfd_elf_generic_reloc
, /* special_function */
1410 "R_ARM_GOT_BREL12", /* name */
1411 FALSE
, /* partial_inplace */
1412 0x00000fff, /* src_mask */
1413 0x00000fff, /* dst_mask */
1414 FALSE
), /* pcrel_offset */
1416 HOWTO (R_ARM_GOTOFF12
, /* type */
1418 2, /* size (0 = byte, 1 = short, 2 = long) */
1420 FALSE
, /* pc_relative */
1422 complain_overflow_bitfield
,/* complain_on_overflow */
1423 bfd_elf_generic_reloc
, /* special_function */
1424 "R_ARM_GOTOFF12", /* name */
1425 FALSE
, /* partial_inplace */
1426 0x00000fff, /* src_mask */
1427 0x00000fff, /* dst_mask */
1428 FALSE
), /* pcrel_offset */
1430 EMPTY_HOWTO (R_ARM_GOTRELAX
), /* reserved for future GOT-load optimizations */
1432 /* GNU extension to record C++ vtable member usage */
1433 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1437 FALSE
, /* pc_relative */
1439 complain_overflow_dont
, /* complain_on_overflow */
1440 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
1441 "R_ARM_GNU_VTENTRY", /* name */
1442 FALSE
, /* partial_inplace */
1445 FALSE
), /* pcrel_offset */
1447 /* GNU extension to record C++ vtable hierarchy */
1448 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1452 FALSE
, /* pc_relative */
1454 complain_overflow_dont
, /* complain_on_overflow */
1455 NULL
, /* special_function */
1456 "R_ARM_GNU_VTINHERIT", /* name */
1457 FALSE
, /* partial_inplace */
1460 FALSE
), /* pcrel_offset */
1462 HOWTO (R_ARM_THM_JUMP11
, /* type */
1464 1, /* size (0 = byte, 1 = short, 2 = long) */
1466 TRUE
, /* pc_relative */
1468 complain_overflow_signed
, /* complain_on_overflow */
1469 bfd_elf_generic_reloc
, /* special_function */
1470 "R_ARM_THM_JUMP11", /* name */
1471 FALSE
, /* partial_inplace */
1472 0x000007ff, /* src_mask */
1473 0x000007ff, /* dst_mask */
1474 TRUE
), /* pcrel_offset */
1476 HOWTO (R_ARM_THM_JUMP8
, /* type */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 TRUE
, /* pc_relative */
1482 complain_overflow_signed
, /* complain_on_overflow */
1483 bfd_elf_generic_reloc
, /* special_function */
1484 "R_ARM_THM_JUMP8", /* name */
1485 FALSE
, /* partial_inplace */
1486 0x000000ff, /* src_mask */
1487 0x000000ff, /* dst_mask */
1488 TRUE
), /* pcrel_offset */
1490 /* TLS relocations */
1491 HOWTO (R_ARM_TLS_GD32
, /* type */
1493 2, /* size (0 = byte, 1 = short, 2 = long) */
1495 FALSE
, /* pc_relative */
1497 complain_overflow_bitfield
,/* complain_on_overflow */
1498 NULL
, /* special_function */
1499 "R_ARM_TLS_GD32", /* name */
1500 TRUE
, /* partial_inplace */
1501 0xffffffff, /* src_mask */
1502 0xffffffff, /* dst_mask */
1503 FALSE
), /* pcrel_offset */
1505 HOWTO (R_ARM_TLS_LDM32
, /* type */
1507 2, /* size (0 = byte, 1 = short, 2 = long) */
1509 FALSE
, /* pc_relative */
1511 complain_overflow_bitfield
,/* complain_on_overflow */
1512 bfd_elf_generic_reloc
, /* special_function */
1513 "R_ARM_TLS_LDM32", /* name */
1514 TRUE
, /* partial_inplace */
1515 0xffffffff, /* src_mask */
1516 0xffffffff, /* dst_mask */
1517 FALSE
), /* pcrel_offset */
1519 HOWTO (R_ARM_TLS_LDO32
, /* type */
1521 2, /* size (0 = byte, 1 = short, 2 = long) */
1523 FALSE
, /* pc_relative */
1525 complain_overflow_bitfield
,/* complain_on_overflow */
1526 bfd_elf_generic_reloc
, /* special_function */
1527 "R_ARM_TLS_LDO32", /* name */
1528 TRUE
, /* partial_inplace */
1529 0xffffffff, /* src_mask */
1530 0xffffffff, /* dst_mask */
1531 FALSE
), /* pcrel_offset */
1533 HOWTO (R_ARM_TLS_IE32
, /* type */
1535 2, /* size (0 = byte, 1 = short, 2 = long) */
1537 FALSE
, /* pc_relative */
1539 complain_overflow_bitfield
,/* complain_on_overflow */
1540 NULL
, /* special_function */
1541 "R_ARM_TLS_IE32", /* name */
1542 TRUE
, /* partial_inplace */
1543 0xffffffff, /* src_mask */
1544 0xffffffff, /* dst_mask */
1545 FALSE
), /* pcrel_offset */
1547 HOWTO (R_ARM_TLS_LE32
, /* type */
1549 2, /* size (0 = byte, 1 = short, 2 = long) */
1551 FALSE
, /* pc_relative */
1553 complain_overflow_bitfield
,/* complain_on_overflow */
1554 bfd_elf_generic_reloc
, /* special_function */
1555 "R_ARM_TLS_LE32", /* name */
1556 TRUE
, /* partial_inplace */
1557 0xffffffff, /* src_mask */
1558 0xffffffff, /* dst_mask */
1559 FALSE
), /* pcrel_offset */
1561 HOWTO (R_ARM_TLS_LDO12
, /* type */
1563 2, /* size (0 = byte, 1 = short, 2 = long) */
1565 FALSE
, /* pc_relative */
1567 complain_overflow_bitfield
,/* complain_on_overflow */
1568 bfd_elf_generic_reloc
, /* special_function */
1569 "R_ARM_TLS_LDO12", /* name */
1570 FALSE
, /* partial_inplace */
1571 0x00000fff, /* src_mask */
1572 0x00000fff, /* dst_mask */
1573 FALSE
), /* pcrel_offset */
1575 HOWTO (R_ARM_TLS_LE12
, /* type */
1577 2, /* size (0 = byte, 1 = short, 2 = long) */
1579 FALSE
, /* pc_relative */
1581 complain_overflow_bitfield
,/* complain_on_overflow */
1582 bfd_elf_generic_reloc
, /* special_function */
1583 "R_ARM_TLS_LE12", /* name */
1584 FALSE
, /* partial_inplace */
1585 0x00000fff, /* src_mask */
1586 0x00000fff, /* dst_mask */
1587 FALSE
), /* pcrel_offset */
1589 HOWTO (R_ARM_TLS_IE12GP
, /* type */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1593 FALSE
, /* pc_relative */
1595 complain_overflow_bitfield
,/* complain_on_overflow */
1596 bfd_elf_generic_reloc
, /* special_function */
1597 "R_ARM_TLS_IE12GP", /* name */
1598 FALSE
, /* partial_inplace */
1599 0x00000fff, /* src_mask */
1600 0x00000fff, /* dst_mask */
1601 FALSE
), /* pcrel_offset */
1604 /* 112-127 private relocations
1605 128 R_ARM_ME_TOO, obsolete
1606 129-255 unallocated in AAELF.
1608 249-255 extended, currently unused, relocations: */
1610 static reloc_howto_type elf32_arm_howto_table_2
[4] =
1612 HOWTO (R_ARM_RREL32
, /* type */
1614 0, /* size (0 = byte, 1 = short, 2 = long) */
1616 FALSE
, /* pc_relative */
1618 complain_overflow_dont
,/* complain_on_overflow */
1619 bfd_elf_generic_reloc
, /* special_function */
1620 "R_ARM_RREL32", /* name */
1621 FALSE
, /* partial_inplace */
1624 FALSE
), /* pcrel_offset */
1626 HOWTO (R_ARM_RABS32
, /* type */
1628 0, /* size (0 = byte, 1 = short, 2 = long) */
1630 FALSE
, /* pc_relative */
1632 complain_overflow_dont
,/* complain_on_overflow */
1633 bfd_elf_generic_reloc
, /* special_function */
1634 "R_ARM_RABS32", /* name */
1635 FALSE
, /* partial_inplace */
1638 FALSE
), /* pcrel_offset */
1640 HOWTO (R_ARM_RPC24
, /* type */
1642 0, /* size (0 = byte, 1 = short, 2 = long) */
1644 FALSE
, /* pc_relative */
1646 complain_overflow_dont
,/* complain_on_overflow */
1647 bfd_elf_generic_reloc
, /* special_function */
1648 "R_ARM_RPC24", /* name */
1649 FALSE
, /* partial_inplace */
1652 FALSE
), /* pcrel_offset */
1654 HOWTO (R_ARM_RBASE
, /* type */
1656 0, /* size (0 = byte, 1 = short, 2 = long) */
1658 FALSE
, /* pc_relative */
1660 complain_overflow_dont
,/* complain_on_overflow */
1661 bfd_elf_generic_reloc
, /* special_function */
1662 "R_ARM_RBASE", /* name */
1663 FALSE
, /* partial_inplace */
1666 FALSE
) /* pcrel_offset */
1669 static reloc_howto_type
*
1670 elf32_arm_howto_from_type (unsigned int r_type
)
1672 if (r_type
< ARRAY_SIZE (elf32_arm_howto_table_1
))
1673 return &elf32_arm_howto_table_1
[r_type
];
1675 if (r_type
>= R_ARM_RREL32
1676 && r_type
< R_ARM_RREL32
+ ARRAY_SIZE (elf32_arm_howto_table_2
))
1677 return &elf32_arm_howto_table_2
[r_type
- R_ARM_RREL32
];
1683 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
1684 Elf_Internal_Rela
* elf_reloc
)
1686 unsigned int r_type
;
1688 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
1689 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
1692 struct elf32_arm_reloc_map
1694 bfd_reloc_code_real_type bfd_reloc_val
;
1695 unsigned char elf_reloc_val
;
1698 /* All entries in this list must also be present in elf32_arm_howto_table. */
1699 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
1701 {BFD_RELOC_NONE
, R_ARM_NONE
},
1702 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
1703 {BFD_RELOC_ARM_PCREL_CALL
, R_ARM_CALL
},
1704 {BFD_RELOC_ARM_PCREL_JUMP
, R_ARM_JUMP24
},
1705 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
1706 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
1707 {BFD_RELOC_32
, R_ARM_ABS32
},
1708 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
1709 {BFD_RELOC_8
, R_ARM_ABS8
},
1710 {BFD_RELOC_16
, R_ARM_ABS16
},
1711 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
1712 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH25
, R_ARM_THM_JUMP24
},
1714 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_CALL
},
1715 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_JUMP11
},
1716 {BFD_RELOC_THUMB_PCREL_BRANCH20
, R_ARM_THM_JUMP19
},
1717 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_JUMP8
},
1718 {BFD_RELOC_THUMB_PCREL_BRANCH7
, R_ARM_THM_JUMP6
},
1719 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
1720 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
1721 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
1722 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF32
},
1723 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
1724 {BFD_RELOC_ARM_GOT_PREL
, R_ARM_GOT_PREL
},
1725 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
1726 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1727 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
1728 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
1729 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
1730 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
1731 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
},
1732 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1733 {BFD_RELOC_ARM_TLS_GD32
, R_ARM_TLS_GD32
},
1734 {BFD_RELOC_ARM_TLS_LDO32
, R_ARM_TLS_LDO32
},
1735 {BFD_RELOC_ARM_TLS_LDM32
, R_ARM_TLS_LDM32
},
1736 {BFD_RELOC_ARM_TLS_DTPMOD32
, R_ARM_TLS_DTPMOD32
},
1737 {BFD_RELOC_ARM_TLS_DTPOFF32
, R_ARM_TLS_DTPOFF32
},
1738 {BFD_RELOC_ARM_TLS_TPOFF32
, R_ARM_TLS_TPOFF32
},
1739 {BFD_RELOC_ARM_TLS_IE32
, R_ARM_TLS_IE32
},
1740 {BFD_RELOC_ARM_TLS_LE32
, R_ARM_TLS_LE32
},
1741 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
1742 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
},
1743 {BFD_RELOC_ARM_MOVW
, R_ARM_MOVW_ABS_NC
},
1744 {BFD_RELOC_ARM_MOVT
, R_ARM_MOVT_ABS
},
1745 {BFD_RELOC_ARM_MOVW_PCREL
, R_ARM_MOVW_PREL_NC
},
1746 {BFD_RELOC_ARM_MOVT_PCREL
, R_ARM_MOVT_PREL
},
1747 {BFD_RELOC_ARM_THUMB_MOVW
, R_ARM_THM_MOVW_ABS_NC
},
1748 {BFD_RELOC_ARM_THUMB_MOVT
, R_ARM_THM_MOVT_ABS
},
1749 {BFD_RELOC_ARM_THUMB_MOVW_PCREL
, R_ARM_THM_MOVW_PREL_NC
},
1750 {BFD_RELOC_ARM_THUMB_MOVT_PCREL
, R_ARM_THM_MOVT_PREL
},
1751 {BFD_RELOC_ARM_ALU_PC_G0_NC
, R_ARM_ALU_PC_G0_NC
},
1752 {BFD_RELOC_ARM_ALU_PC_G0
, R_ARM_ALU_PC_G0
},
1753 {BFD_RELOC_ARM_ALU_PC_G1_NC
, R_ARM_ALU_PC_G1_NC
},
1754 {BFD_RELOC_ARM_ALU_PC_G1
, R_ARM_ALU_PC_G1
},
1755 {BFD_RELOC_ARM_ALU_PC_G2
, R_ARM_ALU_PC_G2
},
1756 {BFD_RELOC_ARM_LDR_PC_G0
, R_ARM_LDR_PC_G0
},
1757 {BFD_RELOC_ARM_LDR_PC_G1
, R_ARM_LDR_PC_G1
},
1758 {BFD_RELOC_ARM_LDR_PC_G2
, R_ARM_LDR_PC_G2
},
1759 {BFD_RELOC_ARM_LDRS_PC_G0
, R_ARM_LDRS_PC_G0
},
1760 {BFD_RELOC_ARM_LDRS_PC_G1
, R_ARM_LDRS_PC_G1
},
1761 {BFD_RELOC_ARM_LDRS_PC_G2
, R_ARM_LDRS_PC_G2
},
1762 {BFD_RELOC_ARM_LDC_PC_G0
, R_ARM_LDC_PC_G0
},
1763 {BFD_RELOC_ARM_LDC_PC_G1
, R_ARM_LDC_PC_G1
},
1764 {BFD_RELOC_ARM_LDC_PC_G2
, R_ARM_LDC_PC_G2
},
1765 {BFD_RELOC_ARM_ALU_SB_G0_NC
, R_ARM_ALU_SB_G0_NC
},
1766 {BFD_RELOC_ARM_ALU_SB_G0
, R_ARM_ALU_SB_G0
},
1767 {BFD_RELOC_ARM_ALU_SB_G1_NC
, R_ARM_ALU_SB_G1_NC
},
1768 {BFD_RELOC_ARM_ALU_SB_G1
, R_ARM_ALU_SB_G1
},
1769 {BFD_RELOC_ARM_ALU_SB_G2
, R_ARM_ALU_SB_G2
},
1770 {BFD_RELOC_ARM_LDR_SB_G0
, R_ARM_LDR_SB_G0
},
1771 {BFD_RELOC_ARM_LDR_SB_G1
, R_ARM_LDR_SB_G1
},
1772 {BFD_RELOC_ARM_LDR_SB_G2
, R_ARM_LDR_SB_G2
},
1773 {BFD_RELOC_ARM_LDRS_SB_G0
, R_ARM_LDRS_SB_G0
},
1774 {BFD_RELOC_ARM_LDRS_SB_G1
, R_ARM_LDRS_SB_G1
},
1775 {BFD_RELOC_ARM_LDRS_SB_G2
, R_ARM_LDRS_SB_G2
},
1776 {BFD_RELOC_ARM_LDC_SB_G0
, R_ARM_LDC_SB_G0
},
1777 {BFD_RELOC_ARM_LDC_SB_G1
, R_ARM_LDC_SB_G1
},
1778 {BFD_RELOC_ARM_LDC_SB_G2
, R_ARM_LDC_SB_G2
},
1779 {BFD_RELOC_ARM_V4BX
, R_ARM_V4BX
}
1782 static reloc_howto_type
*
1783 elf32_arm_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1784 bfd_reloc_code_real_type code
)
1788 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_reloc_map
); i
++)
1789 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
1790 return elf32_arm_howto_from_type (elf32_arm_reloc_map
[i
].elf_reloc_val
);
1795 static reloc_howto_type
*
1796 elf32_arm_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1801 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_1
); i
++)
1802 if (elf32_arm_howto_table_1
[i
].name
!= NULL
1803 && strcasecmp (elf32_arm_howto_table_1
[i
].name
, r_name
) == 0)
1804 return &elf32_arm_howto_table_1
[i
];
1806 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_2
); i
++)
1807 if (elf32_arm_howto_table_2
[i
].name
!= NULL
1808 && strcasecmp (elf32_arm_howto_table_2
[i
].name
, r_name
) == 0)
1809 return &elf32_arm_howto_table_2
[i
];
1814 /* Support for core dump NOTE sections. */
1817 elf32_arm_nabi_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1822 switch (note
->descsz
)
1827 case 148: /* Linux/ARM 32-bit. */
1829 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
1832 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
1841 /* Make a ".reg/999" section. */
1842 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
1843 size
, note
->descpos
+ offset
);
1847 elf32_arm_nabi_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
1849 switch (note
->descsz
)
1854 case 124: /* Linux/ARM elf_prpsinfo. */
1855 elf_tdata (abfd
)->core_program
1856 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
1857 elf_tdata (abfd
)->core_command
1858 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
1861 /* Note that for some reason, a spurious space is tacked
1862 onto the end of the args in some (at least one anyway)
1863 implementations, so strip it off if it exists. */
1865 char *command
= elf_tdata (abfd
)->core_command
;
1866 int n
= strlen (command
);
1868 if (0 < n
&& command
[n
- 1] == ' ')
1869 command
[n
- 1] = '\0';
1875 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1876 #define TARGET_LITTLE_NAME "elf32-littlearm"
1877 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1878 #define TARGET_BIG_NAME "elf32-bigarm"
1880 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1881 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1883 typedef unsigned long int insn32
;
1884 typedef unsigned short int insn16
;
1886 /* In lieu of proper flags, assume all EABIv4 or later objects are
1888 #define INTERWORK_FLAG(abfd) \
1889 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1890 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
1891 || ((abfd)->flags & BFD_LINKER_CREATED))
1893 /* The linker script knows the section names for placement.
1894 The entry_names are used to do simple name mangling on the stubs.
1895 Given a function name, and its type, the stub can be found. The
1896 name can be changed. The only requirement is the %s be present. */
1897 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1898 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1900 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1901 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1903 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1904 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1906 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1907 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1909 #define STUB_ENTRY_NAME "__%s_veneer"
1911 /* The name of the dynamic interpreter. This is put in the .interp
1913 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1915 #ifdef FOUR_WORD_PLT
1917 /* The first entry in a procedure linkage table looks like
1918 this. It is set up so that any shared library function that is
1919 called before the relocation has been set up calls the dynamic
1921 static const bfd_vma elf32_arm_plt0_entry
[] =
1923 0xe52de004, /* str lr, [sp, #-4]! */
1924 0xe59fe010, /* ldr lr, [pc, #16] */
1925 0xe08fe00e, /* add lr, pc, lr */
1926 0xe5bef008, /* ldr pc, [lr, #8]! */
1929 /* Subsequent entries in a procedure linkage table look like
1931 static const bfd_vma elf32_arm_plt_entry
[] =
1933 0xe28fc600, /* add ip, pc, #NN */
1934 0xe28cca00, /* add ip, ip, #NN */
1935 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1936 0x00000000, /* unused */
1941 /* The first entry in a procedure linkage table looks like
1942 this. It is set up so that any shared library function that is
1943 called before the relocation has been set up calls the dynamic
1945 static const bfd_vma elf32_arm_plt0_entry
[] =
1947 0xe52de004, /* str lr, [sp, #-4]! */
1948 0xe59fe004, /* ldr lr, [pc, #4] */
1949 0xe08fe00e, /* add lr, pc, lr */
1950 0xe5bef008, /* ldr pc, [lr, #8]! */
1951 0x00000000, /* &GOT[0] - . */
1954 /* Subsequent entries in a procedure linkage table look like
1956 static const bfd_vma elf32_arm_plt_entry
[] =
1958 0xe28fc600, /* add ip, pc, #0xNN00000 */
1959 0xe28cca00, /* add ip, ip, #0xNN000 */
1960 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1965 /* The format of the first entry in the procedure linkage table
1966 for a VxWorks executable. */
1967 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry
[] =
1969 0xe52dc008, /* str ip,[sp,#-8]! */
1970 0xe59fc000, /* ldr ip,[pc] */
1971 0xe59cf008, /* ldr pc,[ip,#8] */
1972 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1975 /* The format of subsequent entries in a VxWorks executable. */
1976 static const bfd_vma elf32_arm_vxworks_exec_plt_entry
[] =
1978 0xe59fc000, /* ldr ip,[pc] */
1979 0xe59cf000, /* ldr pc,[ip] */
1980 0x00000000, /* .long @got */
1981 0xe59fc000, /* ldr ip,[pc] */
1982 0xea000000, /* b _PLT */
1983 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1986 /* The format of entries in a VxWorks shared library. */
1987 static const bfd_vma elf32_arm_vxworks_shared_plt_entry
[] =
1989 0xe59fc000, /* ldr ip,[pc] */
1990 0xe79cf009, /* ldr pc,[ip,r9] */
1991 0x00000000, /* .long @got */
1992 0xe59fc000, /* ldr ip,[pc] */
1993 0xe599f008, /* ldr pc,[r9,#8] */
1994 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1997 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1998 #define PLT_THUMB_STUB_SIZE 4
1999 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
2005 /* The entries in a PLT when using a DLL-based target with multiple
2007 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
2009 0xe51ff004, /* ldr pc, [pc, #-4] */
2010 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2013 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2014 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2015 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2016 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2017 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2018 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2028 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2029 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2030 is inserted in arm_build_one_stub(). */
2031 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2032 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2033 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2034 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2035 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2036 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2041 enum stub_insn_type type
;
2042 unsigned int r_type
;
2046 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2047 to reach the stub if necessary. */
2048 static const insn_sequence elf32_arm_stub_long_branch_any_any
[] =
2050 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2051 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2054 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2056 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb
[] =
2058 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2059 ARM_INSN(0xe12fff1c), /* bx ip */
2060 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2063 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2064 static const insn_sequence elf32_arm_stub_long_branch_thumb_only
[] =
2066 THUMB16_INSN(0xb401), /* push {r0} */
2067 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2068 THUMB16_INSN(0x4684), /* mov ip, r0 */
2069 THUMB16_INSN(0xbc01), /* pop {r0} */
2070 THUMB16_INSN(0x4760), /* bx ip */
2071 THUMB16_INSN(0xbf00), /* nop */
2072 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2075 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2077 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb
[] =
2079 THUMB16_INSN(0x4778), /* bx pc */
2080 THUMB16_INSN(0x46c0), /* nop */
2081 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2082 ARM_INSN(0xe12fff1c), /* bx ip */
2083 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2086 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2088 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm
[] =
2090 THUMB16_INSN(0x4778), /* bx pc */
2091 THUMB16_INSN(0x46c0), /* nop */
2092 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2093 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2096 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2097 one, when the destination is close enough. */
2098 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm
[] =
2100 THUMB16_INSN(0x4778), /* bx pc */
2101 THUMB16_INSN(0x46c0), /* nop */
2102 ARM_REL_INSN(0xea000000, -8), /* b (X-8) */
2105 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2106 blx to reach the stub if necessary. */
2107 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic
[] =
2109 ARM_INSN(0xe59fc000), /* ldr r12, [pc] */
2110 ARM_INSN(0xe08ff00c), /* add pc, pc, ip */
2111 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2114 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2115 blx to reach the stub if necessary. We can not add into pc;
2116 it is not guaranteed to mode switch (different in ARMv6 and
2118 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic
[] =
2120 ARM_INSN(0xe59fc004), /* ldr r12, [pc, #4] */
2121 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2122 ARM_INSN(0xe12fff1c), /* bx ip */
2123 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2126 /* V4T ARM -> ARM long branch stub, PIC. */
2127 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic
[] =
2129 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2130 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2131 ARM_INSN(0xe12fff1c), /* bx ip */
2132 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2135 /* V4T Thumb -> ARM long branch stub, PIC. */
2136 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic
[] =
2138 THUMB16_INSN(0x4778), /* bx pc */
2139 THUMB16_INSN(0x46c0), /* nop */
2140 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2141 ARM_INSN(0xe08cf00f), /* add pc, ip, pc */
2142 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2145 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2147 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic
[] =
2149 THUMB16_INSN(0xb401), /* push {r0} */
2150 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2151 THUMB16_INSN(0x46fc), /* mov ip, pc */
2152 THUMB16_INSN(0x4484), /* add ip, r0 */
2153 THUMB16_INSN(0xbc01), /* pop {r0} */
2154 THUMB16_INSN(0x4760), /* bx ip */
2155 DATA_WORD(0, R_ARM_REL32
, 4), /* dcd R_ARM_REL32(X) */
2158 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2160 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic
[] =
2162 THUMB16_INSN(0x4778), /* bx pc */
2163 THUMB16_INSN(0x46c0), /* nop */
2164 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2165 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2166 ARM_INSN(0xe12fff1c), /* bx ip */
2167 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2170 /* Cortex-A8 erratum-workaround stubs. */
2172 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2173 can't use a conditional branch to reach this stub). */
2175 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond
[] =
2177 THUMB16_BCOND_INSN(0xd001), /* b<cond>.n true. */
2178 THUMB32_B_INSN(0xf000b800, -4), /* b.w insn_after_original_branch. */
2179 THUMB32_B_INSN(0xf000b800, -4) /* true: b.w original_branch_dest. */
2182 /* Stub used for b.w and bl.w instructions. */
2184 static const insn_sequence elf32_arm_stub_a8_veneer_b
[] =
2186 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2189 static const insn_sequence elf32_arm_stub_a8_veneer_bl
[] =
2191 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2194 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2195 instruction (which switches to ARM mode) to point to this stub. Jump to the
2196 real destination using an ARM-mode branch. */
2198 static const insn_sequence elf32_arm_stub_a8_veneer_blx
[] =
2200 ARM_REL_INSN(0xea000000, -8) /* b original_branch_dest. */
2203 /* Section name for stubs is the associated section name plus this
2205 #define STUB_SUFFIX ".stub"
2207 /* One entry per long/short branch stub defined above. */
2209 DEF_STUB(long_branch_any_any) \
2210 DEF_STUB(long_branch_v4t_arm_thumb) \
2211 DEF_STUB(long_branch_thumb_only) \
2212 DEF_STUB(long_branch_v4t_thumb_thumb) \
2213 DEF_STUB(long_branch_v4t_thumb_arm) \
2214 DEF_STUB(short_branch_v4t_thumb_arm) \
2215 DEF_STUB(long_branch_any_arm_pic) \
2216 DEF_STUB(long_branch_any_thumb_pic) \
2217 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2218 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2219 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2220 DEF_STUB(long_branch_thumb_only_pic) \
2221 DEF_STUB(a8_veneer_b_cond) \
2222 DEF_STUB(a8_veneer_b) \
2223 DEF_STUB(a8_veneer_bl) \
2224 DEF_STUB(a8_veneer_blx)
2226 #define DEF_STUB(x) arm_stub_##x,
2227 enum elf32_arm_stub_type
{
2230 /* Note the first a8_veneer type */
2231 arm_stub_a8_veneer_lwm
= arm_stub_a8_veneer_b_cond
2237 const insn_sequence
* template_sequence
;
2241 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2242 static const stub_def stub_definitions
[] = {
2247 struct elf32_arm_stub_hash_entry
2249 /* Base hash table entry structure. */
2250 struct bfd_hash_entry root
;
2252 /* The stub section. */
2255 /* Offset within stub_sec of the beginning of this stub. */
2256 bfd_vma stub_offset
;
2258 /* Given the symbol's value and its section we can determine its final
2259 value when building the stubs (so the stub knows where to jump). */
2260 bfd_vma target_value
;
2261 asection
*target_section
;
2263 /* Offset to apply to relocation referencing target_value. */
2264 bfd_vma target_addend
;
2266 /* The instruction which caused this stub to be generated (only valid for
2267 Cortex-A8 erratum workaround stubs at present). */
2268 unsigned long orig_insn
;
2270 /* The stub type. */
2271 enum elf32_arm_stub_type stub_type
;
2272 /* Its encoding size in bytes. */
2275 const insn_sequence
*stub_template
;
2276 /* The size of the template (number of entries). */
2277 int stub_template_size
;
2279 /* The symbol table entry, if any, that this was derived from. */
2280 struct elf32_arm_link_hash_entry
*h
;
2282 /* Destination symbol type (STT_ARM_TFUNC, ...) */
2283 unsigned char st_type
;
2285 /* Where this stub is being called from, or, in the case of combined
2286 stub sections, the first input section in the group. */
2289 /* The name for the local symbol at the start of this stub. The
2290 stub name in the hash table has to be unique; this does not, so
2291 it can be friendlier. */
2295 /* Used to build a map of a section. This is required for mixed-endian
2298 typedef struct elf32_elf_section_map
2303 elf32_arm_section_map
;
2305 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2309 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
,
2310 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
,
2311 VFP11_ERRATUM_ARM_VENEER
,
2312 VFP11_ERRATUM_THUMB_VENEER
2314 elf32_vfp11_erratum_type
;
2316 typedef struct elf32_vfp11_erratum_list
2318 struct elf32_vfp11_erratum_list
*next
;
2324 struct elf32_vfp11_erratum_list
*veneer
;
2325 unsigned int vfp_insn
;
2329 struct elf32_vfp11_erratum_list
*branch
;
2333 elf32_vfp11_erratum_type type
;
2335 elf32_vfp11_erratum_list
;
2340 INSERT_EXIDX_CANTUNWIND_AT_END
2342 arm_unwind_edit_type
;
2344 /* A (sorted) list of edits to apply to an unwind table. */
2345 typedef struct arm_unwind_table_edit
2347 arm_unwind_edit_type type
;
2348 /* Note: we sometimes want to insert an unwind entry corresponding to a
2349 section different from the one we're currently writing out, so record the
2350 (text) section this edit relates to here. */
2351 asection
*linked_section
;
2353 struct arm_unwind_table_edit
*next
;
2355 arm_unwind_table_edit
;
2357 typedef struct _arm_elf_section_data
2359 /* Information about mapping symbols. */
2360 struct bfd_elf_section_data elf
;
2361 unsigned int mapcount
;
2362 unsigned int mapsize
;
2363 elf32_arm_section_map
*map
;
2364 /* Information about CPU errata. */
2365 unsigned int erratumcount
;
2366 elf32_vfp11_erratum_list
*erratumlist
;
2367 /* Information about unwind tables. */
2370 /* Unwind info attached to a text section. */
2373 asection
*arm_exidx_sec
;
2376 /* Unwind info attached to an .ARM.exidx section. */
2379 arm_unwind_table_edit
*unwind_edit_list
;
2380 arm_unwind_table_edit
*unwind_edit_tail
;
2384 _arm_elf_section_data
;
2386 #define elf32_arm_section_data(sec) \
2387 ((_arm_elf_section_data *) elf_section_data (sec))
2389 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2390 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2391 so may be created multiple times: we use an array of these entries whilst
2392 relaxing which we can refresh easily, then create stubs for each potentially
2393 erratum-triggering instruction once we've settled on a solution. */
2395 struct a8_erratum_fix
{
2400 unsigned long orig_insn
;
2402 enum elf32_arm_stub_type stub_type
;
2406 /* A table of relocs applied to branches which might trigger Cortex-A8
2409 struct a8_erratum_reloc
{
2411 bfd_vma destination
;
2412 struct elf32_arm_link_hash_entry
*hash
;
2413 const char *sym_name
;
2414 unsigned int r_type
;
2415 unsigned char st_type
;
2416 bfd_boolean non_a8_stub
;
2419 /* The size of the thread control block. */
2422 struct elf_arm_obj_tdata
2424 struct elf_obj_tdata root
;
2426 /* tls_type for each local got entry. */
2427 char *local_got_tls_type
;
2429 /* Zero to warn when linking objects with incompatible enum sizes. */
2430 int no_enum_size_warning
;
2432 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2433 int no_wchar_size_warning
;
2436 #define elf_arm_tdata(bfd) \
2437 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2439 #define elf32_arm_local_got_tls_type(bfd) \
2440 (elf_arm_tdata (bfd)->local_got_tls_type)
2442 #define is_arm_elf(bfd) \
2443 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2444 && elf_tdata (bfd) != NULL \
2445 && elf_object_id (bfd) == ARM_ELF_DATA)
2448 elf32_arm_mkobject (bfd
*abfd
)
2450 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2454 /* The ARM linker needs to keep track of the number of relocs that it
2455 decides to copy in check_relocs for each symbol. This is so that
2456 it can discard PC relative relocs if it doesn't need them when
2457 linking with -Bsymbolic. We store the information in a field
2458 extending the regular ELF linker hash table. */
2460 /* This structure keeps track of the number of relocs we have copied
2461 for a given symbol. */
2462 struct elf32_arm_relocs_copied
2465 struct elf32_arm_relocs_copied
* next
;
2466 /* A section in dynobj. */
2468 /* Number of relocs copied in this section. */
2469 bfd_size_type count
;
2470 /* Number of PC-relative relocs copied in this section. */
2471 bfd_size_type pc_count
;
2474 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2476 /* Arm ELF linker hash entry. */
2477 struct elf32_arm_link_hash_entry
2479 struct elf_link_hash_entry root
;
2481 /* Number of PC relative relocs copied for this symbol. */
2482 struct elf32_arm_relocs_copied
* relocs_copied
;
2484 /* We reference count Thumb references to a PLT entry separately,
2485 so that we can emit the Thumb trampoline only if needed. */
2486 bfd_signed_vma plt_thumb_refcount
;
2488 /* Some references from Thumb code may be eliminated by BL->BLX
2489 conversion, so record them separately. */
2490 bfd_signed_vma plt_maybe_thumb_refcount
;
2492 /* Since PLT entries have variable size if the Thumb prologue is
2493 used, we need to record the index into .got.plt instead of
2494 recomputing it from the PLT offset. */
2495 bfd_signed_vma plt_got_offset
;
2497 #define GOT_UNKNOWN 0
2498 #define GOT_NORMAL 1
2499 #define GOT_TLS_GD 2
2500 #define GOT_TLS_IE 4
2501 unsigned char tls_type
;
2503 /* The symbol marking the real symbol location for exported thumb
2504 symbols with Arm stubs. */
2505 struct elf_link_hash_entry
*export_glue
;
2507 /* A pointer to the most recently used stub hash entry against this
2509 struct elf32_arm_stub_hash_entry
*stub_cache
;
2512 /* Traverse an arm ELF linker hash table. */
2513 #define elf32_arm_link_hash_traverse(table, func, info) \
2514 (elf_link_hash_traverse \
2516 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2519 /* Get the ARM elf linker hash table from a link_info structure. */
2520 #define elf32_arm_hash_table(info) \
2521 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2522 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2524 #define arm_stub_hash_lookup(table, string, create, copy) \
2525 ((struct elf32_arm_stub_hash_entry *) \
2526 bfd_hash_lookup ((table), (string), (create), (copy)))
2528 /* Array to keep track of which stub sections have been created, and
2529 information on stub grouping. */
2532 /* This is the section to which stubs in the group will be
2535 /* The stub section. */
2539 /* ARM ELF linker hash table. */
2540 struct elf32_arm_link_hash_table
2542 /* The main hash table. */
2543 struct elf_link_hash_table root
;
2545 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2546 bfd_size_type thumb_glue_size
;
2548 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2549 bfd_size_type arm_glue_size
;
2551 /* The size in bytes of section containing the ARMv4 BX veneers. */
2552 bfd_size_type bx_glue_size
;
2554 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2555 veneer has been populated. */
2556 bfd_vma bx_glue_offset
[15];
2558 /* The size in bytes of the section containing glue for VFP11 erratum
2560 bfd_size_type vfp11_erratum_glue_size
;
2562 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2563 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2564 elf32_arm_write_section(). */
2565 struct a8_erratum_fix
*a8_erratum_fixes
;
2566 unsigned int num_a8_erratum_fixes
;
2568 /* An arbitrary input BFD chosen to hold the glue sections. */
2569 bfd
* bfd_of_glue_owner
;
2571 /* Nonzero to output a BE8 image. */
2574 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2575 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2578 /* The relocation to use for R_ARM_TARGET2 relocations. */
2581 /* 0 = Ignore R_ARM_V4BX.
2582 1 = Convert BX to MOV PC.
2583 2 = Generate v4 interworing stubs. */
2586 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2589 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2592 /* What sort of code sequences we should look for which may trigger the
2593 VFP11 denorm erratum. */
2594 bfd_arm_vfp11_fix vfp11_fix
;
2596 /* Global counter for the number of fixes we have emitted. */
2597 int num_vfp11_fixes
;
2599 /* Nonzero to force PIC branch veneers. */
2602 /* The number of bytes in the initial entry in the PLT. */
2603 bfd_size_type plt_header_size
;
2605 /* The number of bytes in the subsequent PLT etries. */
2606 bfd_size_type plt_entry_size
;
2608 /* True if the target system is VxWorks. */
2611 /* True if the target system is Symbian OS. */
2614 /* True if the target uses REL relocations. */
2617 /* Short-cuts to get to dynamic linker sections. */
2626 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2629 /* Data for R_ARM_TLS_LDM32 relocations. */
2632 bfd_signed_vma refcount
;
2636 /* Small local sym cache. */
2637 struct sym_cache sym_cache
;
2639 /* For convenience in allocate_dynrelocs. */
2642 /* The stub hash table. */
2643 struct bfd_hash_table stub_hash_table
;
2645 /* Linker stub bfd. */
2648 /* Linker call-backs. */
2649 asection
* (*add_stub_section
) (const char *, asection
*);
2650 void (*layout_sections_again
) (void);
2652 /* Array to keep track of which stub sections have been created, and
2653 information on stub grouping. */
2654 struct map_stub
*stub_group
;
2656 /* Number of elements in stub_group. */
2659 /* Assorted information used by elf32_arm_size_stubs. */
2660 unsigned int bfd_count
;
2662 asection
**input_list
;
2665 /* Create an entry in an ARM ELF linker hash table. */
2667 static struct bfd_hash_entry
*
2668 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
2669 struct bfd_hash_table
* table
,
2670 const char * string
)
2672 struct elf32_arm_link_hash_entry
* ret
=
2673 (struct elf32_arm_link_hash_entry
*) entry
;
2675 /* Allocate the structure if it has not already been allocated by a
2678 ret
= (struct elf32_arm_link_hash_entry
*)
2679 bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
2681 return (struct bfd_hash_entry
*) ret
;
2683 /* Call the allocation method of the superclass. */
2684 ret
= ((struct elf32_arm_link_hash_entry
*)
2685 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2689 ret
->relocs_copied
= NULL
;
2690 ret
->tls_type
= GOT_UNKNOWN
;
2691 ret
->plt_thumb_refcount
= 0;
2692 ret
->plt_maybe_thumb_refcount
= 0;
2693 ret
->plt_got_offset
= -1;
2694 ret
->export_glue
= NULL
;
2696 ret
->stub_cache
= NULL
;
2699 return (struct bfd_hash_entry
*) ret
;
2702 /* Initialize an entry in the stub hash table. */
2704 static struct bfd_hash_entry
*
2705 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2706 struct bfd_hash_table
*table
,
2709 /* Allocate the structure if it has not already been allocated by a
2713 entry
= (struct bfd_hash_entry
*)
2714 bfd_hash_allocate (table
, sizeof (struct elf32_arm_stub_hash_entry
));
2719 /* Call the allocation method of the superclass. */
2720 entry
= bfd_hash_newfunc (entry
, table
, string
);
2723 struct elf32_arm_stub_hash_entry
*eh
;
2725 /* Initialize the local fields. */
2726 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
2727 eh
->stub_sec
= NULL
;
2728 eh
->stub_offset
= 0;
2729 eh
->target_value
= 0;
2730 eh
->target_section
= NULL
;
2731 eh
->target_addend
= 0;
2733 eh
->stub_type
= arm_stub_none
;
2735 eh
->stub_template
= NULL
;
2736 eh
->stub_template_size
= 0;
2739 eh
->output_name
= NULL
;
2745 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2746 shortcuts to them in our hash table. */
2749 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
2751 struct elf32_arm_link_hash_table
*htab
;
2753 htab
= elf32_arm_hash_table (info
);
2757 /* BPABI objects never have a GOT, or associated sections. */
2758 if (htab
->symbian_p
)
2761 if (! _bfd_elf_create_got_section (dynobj
, info
))
2764 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
2765 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
2766 if (!htab
->sgot
|| !htab
->sgotplt
)
2769 htab
->srelgot
= bfd_get_section_by_name (dynobj
,
2770 RELOC_SECTION (htab
, ".got"));
2771 if (htab
->srelgot
== NULL
)
2776 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2777 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2781 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
2783 struct elf32_arm_link_hash_table
*htab
;
2785 htab
= elf32_arm_hash_table (info
);
2789 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
2792 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
2795 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
2796 htab
->srelplt
= bfd_get_section_by_name (dynobj
,
2797 RELOC_SECTION (htab
, ".plt"));
2798 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
2800 htab
->srelbss
= bfd_get_section_by_name (dynobj
,
2801 RELOC_SECTION (htab
, ".bss"));
2803 if (htab
->vxworks_p
)
2805 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
2810 htab
->plt_header_size
= 0;
2811 htab
->plt_entry_size
2812 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
2816 htab
->plt_header_size
2817 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
2818 htab
->plt_entry_size
2819 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
2826 || (!info
->shared
&& !htab
->srelbss
))
2832 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2835 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
2836 struct elf_link_hash_entry
*dir
,
2837 struct elf_link_hash_entry
*ind
)
2839 struct elf32_arm_link_hash_entry
*edir
, *eind
;
2841 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
2842 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
2844 if (eind
->relocs_copied
!= NULL
)
2846 if (edir
->relocs_copied
!= NULL
)
2848 struct elf32_arm_relocs_copied
**pp
;
2849 struct elf32_arm_relocs_copied
*p
;
2851 /* Add reloc counts against the indirect sym to the direct sym
2852 list. Merge any entries against the same section. */
2853 for (pp
= &eind
->relocs_copied
; (p
= *pp
) != NULL
; )
2855 struct elf32_arm_relocs_copied
*q
;
2857 for (q
= edir
->relocs_copied
; q
!= NULL
; q
= q
->next
)
2858 if (q
->section
== p
->section
)
2860 q
->pc_count
+= p
->pc_count
;
2861 q
->count
+= p
->count
;
2868 *pp
= edir
->relocs_copied
;
2871 edir
->relocs_copied
= eind
->relocs_copied
;
2872 eind
->relocs_copied
= NULL
;
2875 if (ind
->root
.type
== bfd_link_hash_indirect
)
2877 /* Copy over PLT info. */
2878 edir
->plt_thumb_refcount
+= eind
->plt_thumb_refcount
;
2879 eind
->plt_thumb_refcount
= 0;
2880 edir
->plt_maybe_thumb_refcount
+= eind
->plt_maybe_thumb_refcount
;
2881 eind
->plt_maybe_thumb_refcount
= 0;
2883 if (dir
->got
.refcount
<= 0)
2885 edir
->tls_type
= eind
->tls_type
;
2886 eind
->tls_type
= GOT_UNKNOWN
;
2890 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2893 /* Create an ARM elf linker hash table. */
2895 static struct bfd_link_hash_table
*
2896 elf32_arm_link_hash_table_create (bfd
*abfd
)
2898 struct elf32_arm_link_hash_table
*ret
;
2899 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
2901 ret
= (struct elf32_arm_link_hash_table
*) bfd_malloc (amt
);
2905 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
2906 elf32_arm_link_hash_newfunc
,
2907 sizeof (struct elf32_arm_link_hash_entry
),
2915 ret
->sgotplt
= NULL
;
2916 ret
->srelgot
= NULL
;
2918 ret
->srelplt
= NULL
;
2919 ret
->sdynbss
= NULL
;
2920 ret
->srelbss
= NULL
;
2921 ret
->srelplt2
= NULL
;
2922 ret
->thumb_glue_size
= 0;
2923 ret
->arm_glue_size
= 0;
2924 ret
->bx_glue_size
= 0;
2925 memset (ret
->bx_glue_offset
, 0, sizeof (ret
->bx_glue_offset
));
2926 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
2927 ret
->vfp11_erratum_glue_size
= 0;
2928 ret
->num_vfp11_fixes
= 0;
2929 ret
->fix_cortex_a8
= 0;
2930 ret
->bfd_of_glue_owner
= NULL
;
2931 ret
->byteswap_code
= 0;
2932 ret
->target1_is_rel
= 0;
2933 ret
->target2_reloc
= R_ARM_NONE
;
2934 #ifdef FOUR_WORD_PLT
2935 ret
->plt_header_size
= 16;
2936 ret
->plt_entry_size
= 16;
2938 ret
->plt_header_size
= 20;
2939 ret
->plt_entry_size
= 12;
2946 ret
->sym_cache
.abfd
= NULL
;
2948 ret
->tls_ldm_got
.refcount
= 0;
2949 ret
->stub_bfd
= NULL
;
2950 ret
->add_stub_section
= NULL
;
2951 ret
->layout_sections_again
= NULL
;
2952 ret
->stub_group
= NULL
;
2956 ret
->input_list
= NULL
;
2958 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2959 sizeof (struct elf32_arm_stub_hash_entry
)))
2965 return &ret
->root
.root
;
2968 /* Free the derived linker hash table. */
2971 elf32_arm_hash_table_free (struct bfd_link_hash_table
*hash
)
2973 struct elf32_arm_link_hash_table
*ret
2974 = (struct elf32_arm_link_hash_table
*) hash
;
2976 bfd_hash_table_free (&ret
->stub_hash_table
);
2977 _bfd_generic_link_hash_table_free (hash
);
2980 /* Determine if we're dealing with a Thumb only architecture. */
2983 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
2985 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2989 if (arch
== TAG_CPU_ARCH_V6_M
|| arch
== TAG_CPU_ARCH_V6S_M
)
2992 if (arch
!= TAG_CPU_ARCH_V7
&& arch
!= TAG_CPU_ARCH_V7E_M
)
2995 profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2996 Tag_CPU_arch_profile
);
2998 return profile
== 'M';
3001 /* Determine if we're dealing with a Thumb-2 object. */
3004 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
3006 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3008 return arch
== TAG_CPU_ARCH_V6T2
|| arch
>= TAG_CPU_ARCH_V7
;
3011 /* Determine what kind of NOPs are available. */
3014 arch_has_arm_nop (struct elf32_arm_link_hash_table
*globals
)
3016 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3018 return arch
== TAG_CPU_ARCH_V6T2
3019 || arch
== TAG_CPU_ARCH_V6K
3020 || arch
== TAG_CPU_ARCH_V7
3021 || arch
== TAG_CPU_ARCH_V7E_M
;
3025 arch_has_thumb2_nop (struct elf32_arm_link_hash_table
*globals
)
3027 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3029 return (arch
== TAG_CPU_ARCH_V6T2
|| arch
== TAG_CPU_ARCH_V7
3030 || arch
== TAG_CPU_ARCH_V7E_M
);
3034 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
3038 case arm_stub_long_branch_thumb_only
:
3039 case arm_stub_long_branch_v4t_thumb_arm
:
3040 case arm_stub_short_branch_v4t_thumb_arm
:
3041 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3042 case arm_stub_long_branch_thumb_only_pic
:
3053 /* Determine the type of stub needed, if any, for a call. */
3055 static enum elf32_arm_stub_type
3056 arm_type_of_stub (struct bfd_link_info
*info
,
3057 asection
*input_sec
,
3058 const Elf_Internal_Rela
*rel
,
3059 int *actual_st_type
,
3060 struct elf32_arm_link_hash_entry
*hash
,
3061 bfd_vma destination
,
3067 bfd_signed_vma branch_offset
;
3068 unsigned int r_type
;
3069 struct elf32_arm_link_hash_table
* globals
;
3072 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3074 int st_type
= *actual_st_type
;
3076 /* We don't know the actual type of destination in case it is of
3077 type STT_SECTION: give up. */
3078 if (st_type
== STT_SECTION
)
3081 globals
= elf32_arm_hash_table (info
);
3082 if (globals
== NULL
)
3085 thumb_only
= using_thumb_only (globals
);
3087 thumb2
= using_thumb2 (globals
);
3089 /* Determine where the call point is. */
3090 location
= (input_sec
->output_offset
3091 + input_sec
->output_section
->vma
3094 r_type
= ELF32_R_TYPE (rel
->r_info
);
3096 /* Keep a simpler condition, for the sake of clarity. */
3097 if (globals
->splt
!= NULL
3099 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
3103 /* Note when dealing with PLT entries: the main PLT stub is in
3104 ARM mode, so if the branch is in Thumb mode, another
3105 Thumb->ARM stub will be inserted later just before the ARM
3106 PLT stub. We don't take this extra distance into account
3107 here, because if a long branch stub is needed, we'll add a
3108 Thumb->Arm one and branch directly to the ARM PLT entry
3109 because it avoids spreading offset corrections in several
3112 destination
= (globals
->splt
->output_section
->vma
3113 + globals
->splt
->output_offset
3114 + hash
->root
.plt
.offset
);
3118 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3120 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
3122 /* Handle cases where:
3123 - this call goes too far (different Thumb/Thumb2 max
3125 - it's a Thumb->Arm call and blx is not available, or it's a
3126 Thumb->Arm branch (not bl). A stub is needed in this case,
3127 but only if this call is not through a PLT entry. Indeed,
3128 PLT stubs handle mode switching already.
3131 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3132 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3134 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3135 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3136 || ((st_type
!= STT_ARM_TFUNC
)
3137 && (((r_type
== R_ARM_THM_CALL
) && !globals
->use_blx
)
3138 || (r_type
== R_ARM_THM_JUMP24
))
3141 if (st_type
== STT_ARM_TFUNC
)
3143 /* Thumb to thumb. */
3146 stub_type
= (info
->shared
| globals
->pic_veneer
)
3148 ? ((globals
->use_blx
3149 && (r_type
==R_ARM_THM_CALL
))
3150 /* V5T and above. Stub starts with ARM code, so
3151 we must be able to switch mode before
3152 reaching it, which is only possible for 'bl'
3153 (ie R_ARM_THM_CALL relocation). */
3154 ? arm_stub_long_branch_any_thumb_pic
3155 /* On V4T, use Thumb code only. */
3156 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
3158 /* non-PIC stubs. */
3159 : ((globals
->use_blx
3160 && (r_type
==R_ARM_THM_CALL
))
3161 /* V5T and above. */
3162 ? arm_stub_long_branch_any_any
3164 : arm_stub_long_branch_v4t_thumb_thumb
);
3168 stub_type
= (info
->shared
| globals
->pic_veneer
)
3170 ? arm_stub_long_branch_thumb_only_pic
3172 : arm_stub_long_branch_thumb_only
;
3179 && sym_sec
->owner
!= NULL
3180 && !INTERWORK_FLAG (sym_sec
->owner
))
3182 (*_bfd_error_handler
)
3183 (_("%B(%s): warning: interworking not enabled.\n"
3184 " first occurrence: %B: Thumb call to ARM"),
3185 sym_sec
->owner
, input_bfd
, name
);
3188 stub_type
= (info
->shared
| globals
->pic_veneer
)
3190 ? ((globals
->use_blx
3191 && (r_type
==R_ARM_THM_CALL
))
3192 /* V5T and above. */
3193 ? arm_stub_long_branch_any_arm_pic
3195 : arm_stub_long_branch_v4t_thumb_arm_pic
)
3197 /* non-PIC stubs. */
3198 : ((globals
->use_blx
3199 && (r_type
==R_ARM_THM_CALL
))
3200 /* V5T and above. */
3201 ? arm_stub_long_branch_any_any
3203 : arm_stub_long_branch_v4t_thumb_arm
);
3205 /* Handle v4t short branches. */
3206 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
3207 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
3208 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
3209 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
3213 else if (r_type
== R_ARM_CALL
3214 || r_type
== R_ARM_JUMP24
3215 || r_type
== R_ARM_PLT32
)
3217 if (st_type
== STT_ARM_TFUNC
)
3222 && sym_sec
->owner
!= NULL
3223 && !INTERWORK_FLAG (sym_sec
->owner
))
3225 (*_bfd_error_handler
)
3226 (_("%B(%s): warning: interworking not enabled.\n"
3227 " first occurrence: %B: ARM call to Thumb"),
3228 sym_sec
->owner
, input_bfd
, name
);
3231 /* We have an extra 2-bytes reach because of
3232 the mode change (bit 24 (H) of BLX encoding). */
3233 if (branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
3234 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
3235 || ((r_type
== R_ARM_CALL
) && !globals
->use_blx
)
3236 || (r_type
== R_ARM_JUMP24
)
3237 || (r_type
== R_ARM_PLT32
))
3239 stub_type
= (info
->shared
| globals
->pic_veneer
)
3241 ? ((globals
->use_blx
)
3242 /* V5T and above. */
3243 ? arm_stub_long_branch_any_thumb_pic
3245 : arm_stub_long_branch_v4t_arm_thumb_pic
)
3247 /* non-PIC stubs. */
3248 : ((globals
->use_blx
)
3249 /* V5T and above. */
3250 ? arm_stub_long_branch_any_any
3252 : arm_stub_long_branch_v4t_arm_thumb
);
3258 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
3259 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
3261 stub_type
= (info
->shared
| globals
->pic_veneer
)
3263 ? arm_stub_long_branch_any_arm_pic
3264 /* non-PIC stubs. */
3265 : arm_stub_long_branch_any_any
;
3270 /* If a stub is needed, record the actual destination type. */
3271 if (stub_type
!= arm_stub_none
)
3273 *actual_st_type
= st_type
;
3279 /* Build a name for an entry in the stub hash table. */
3282 elf32_arm_stub_name (const asection
*input_section
,
3283 const asection
*sym_sec
,
3284 const struct elf32_arm_link_hash_entry
*hash
,
3285 const Elf_Internal_Rela
*rel
,
3286 enum elf32_arm_stub_type stub_type
)
3293 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1 + 2 + 1;
3294 stub_name
= (char *) bfd_malloc (len
);
3295 if (stub_name
!= NULL
)
3296 sprintf (stub_name
, "%08x_%s+%x_%d",
3297 input_section
->id
& 0xffffffff,
3298 hash
->root
.root
.root
.string
,
3299 (int) rel
->r_addend
& 0xffffffff,
3304 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
3305 stub_name
= (char *) bfd_malloc (len
);
3306 if (stub_name
!= NULL
)
3307 sprintf (stub_name
, "%08x_%x:%x+%x_%d",
3308 input_section
->id
& 0xffffffff,
3309 sym_sec
->id
& 0xffffffff,
3310 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
3311 (int) rel
->r_addend
& 0xffffffff,
3318 /* Look up an entry in the stub hash. Stub entries are cached because
3319 creating the stub name takes a bit of time. */
3321 static struct elf32_arm_stub_hash_entry
*
3322 elf32_arm_get_stub_entry (const asection
*input_section
,
3323 const asection
*sym_sec
,
3324 struct elf_link_hash_entry
*hash
,
3325 const Elf_Internal_Rela
*rel
,
3326 struct elf32_arm_link_hash_table
*htab
,
3327 enum elf32_arm_stub_type stub_type
)
3329 struct elf32_arm_stub_hash_entry
*stub_entry
;
3330 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
3331 const asection
*id_sec
;
3333 if ((input_section
->flags
& SEC_CODE
) == 0)
3336 /* If this input section is part of a group of sections sharing one
3337 stub section, then use the id of the first section in the group.
3338 Stub names need to include a section id, as there may well be
3339 more than one stub used to reach say, printf, and we need to
3340 distinguish between them. */
3341 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3343 if (h
!= NULL
&& h
->stub_cache
!= NULL
3344 && h
->stub_cache
->h
== h
3345 && h
->stub_cache
->id_sec
== id_sec
3346 && h
->stub_cache
->stub_type
== stub_type
)
3348 stub_entry
= h
->stub_cache
;
3354 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
, stub_type
);
3355 if (stub_name
== NULL
)
3358 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
3359 stub_name
, FALSE
, FALSE
);
3361 h
->stub_cache
= stub_entry
;
3369 /* Find or create a stub section. Returns a pointer to the stub section, and
3370 the section to which the stub section will be attached (in *LINK_SEC_P).
3371 LINK_SEC_P may be NULL. */
3374 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3375 struct elf32_arm_link_hash_table
*htab
)
3380 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3381 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3382 if (stub_sec
== NULL
)
3384 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3385 if (stub_sec
== NULL
)
3391 namelen
= strlen (link_sec
->name
);
3392 len
= namelen
+ sizeof (STUB_SUFFIX
);
3393 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
3397 memcpy (s_name
, link_sec
->name
, namelen
);
3398 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3399 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
3400 if (stub_sec
== NULL
)
3402 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3404 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3408 *link_sec_p
= link_sec
;
3413 /* Add a new stub entry to the stub hash. Not all fields of the new
3414 stub entry are initialised. */
3416 static struct elf32_arm_stub_hash_entry
*
3417 elf32_arm_add_stub (const char *stub_name
,
3419 struct elf32_arm_link_hash_table
*htab
)
3423 struct elf32_arm_stub_hash_entry
*stub_entry
;
3425 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
);
3426 if (stub_sec
== NULL
)
3429 /* Enter this entry into the linker stub hash table. */
3430 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3432 if (stub_entry
== NULL
)
3434 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3440 stub_entry
->stub_sec
= stub_sec
;
3441 stub_entry
->stub_offset
= 0;
3442 stub_entry
->id_sec
= link_sec
;
3447 /* Store an Arm insn into an output section not processed by
3448 elf32_arm_write_section. */
3451 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
3452 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3454 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3455 bfd_putl32 (val
, ptr
);
3457 bfd_putb32 (val
, ptr
);
3460 /* Store a 16-bit Thumb insn into an output section not processed by
3461 elf32_arm_write_section. */
3464 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
3465 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3467 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3468 bfd_putl16 (val
, ptr
);
3470 bfd_putb16 (val
, ptr
);
3473 static bfd_reloc_status_type elf32_arm_final_link_relocate
3474 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
3475 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
3476 const char *, int, struct elf_link_hash_entry
*, bfd_boolean
*, char **);
3479 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
3483 struct elf32_arm_stub_hash_entry
*stub_entry
;
3484 struct elf32_arm_link_hash_table
*globals
;
3485 struct bfd_link_info
*info
;
3493 const insn_sequence
*template_sequence
;
3495 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
3496 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
3499 /* Massage our args to the form they really have. */
3500 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3501 info
= (struct bfd_link_info
*) in_arg
;
3503 globals
= elf32_arm_hash_table (info
);
3504 if (globals
== NULL
)
3507 stub_sec
= stub_entry
->stub_sec
;
3509 if ((globals
->fix_cortex_a8
< 0)
3510 != (stub_entry
->stub_type
>= arm_stub_a8_veneer_lwm
))
3511 /* We have to do the a8 fixes last, as they are less aligned than
3512 the other veneers. */
3515 /* Make a note of the offset within the stubs for this entry. */
3516 stub_entry
->stub_offset
= stub_sec
->size
;
3517 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
3519 stub_bfd
= stub_sec
->owner
;
3521 /* This is the address of the start of the stub. */
3522 stub_addr
= stub_sec
->output_section
->vma
+ stub_sec
->output_offset
3523 + stub_entry
->stub_offset
;
3525 /* This is the address of the stub destination. */
3526 sym_value
= (stub_entry
->target_value
3527 + stub_entry
->target_section
->output_offset
3528 + stub_entry
->target_section
->output_section
->vma
);
3530 template_sequence
= stub_entry
->stub_template
;
3531 template_size
= stub_entry
->stub_template_size
;
3534 for (i
= 0; i
< template_size
; i
++)
3536 switch (template_sequence
[i
].type
)
3540 bfd_vma data
= (bfd_vma
) template_sequence
[i
].data
;
3541 if (template_sequence
[i
].reloc_addend
!= 0)
3543 /* We've borrowed the reloc_addend field to mean we should
3544 insert a condition code into this (Thumb-1 branch)
3545 instruction. See THUMB16_BCOND_INSN. */
3546 BFD_ASSERT ((data
& 0xff00) == 0xd000);
3547 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
3549 bfd_put_16 (stub_bfd
, data
, loc
+ size
);
3555 bfd_put_16 (stub_bfd
,
3556 (template_sequence
[i
].data
>> 16) & 0xffff,
3558 bfd_put_16 (stub_bfd
, template_sequence
[i
].data
& 0xffff,
3560 if (template_sequence
[i
].r_type
!= R_ARM_NONE
)
3562 stub_reloc_idx
[nrelocs
] = i
;
3563 stub_reloc_offset
[nrelocs
++] = size
;
3569 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
,
3571 /* Handle cases where the target is encoded within the
3573 if (template_sequence
[i
].r_type
== R_ARM_JUMP24
)
3575 stub_reloc_idx
[nrelocs
] = i
;
3576 stub_reloc_offset
[nrelocs
++] = size
;
3582 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
, loc
+ size
);
3583 stub_reloc_idx
[nrelocs
] = i
;
3584 stub_reloc_offset
[nrelocs
++] = size
;
3594 stub_sec
->size
+= size
;
3596 /* Stub size has already been computed in arm_size_one_stub. Check
3598 BFD_ASSERT (size
== stub_entry
->stub_size
);
3600 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3601 if (stub_entry
->st_type
== STT_ARM_TFUNC
)
3604 /* Assume there is at least one and at most MAXRELOCS entries to relocate
3606 BFD_ASSERT (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
);
3608 for (i
= 0; i
< nrelocs
; i
++)
3609 if (template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP24
3610 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP19
3611 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_CALL
3612 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_XPC22
)
3614 Elf_Internal_Rela rel
;
3615 bfd_boolean unresolved_reloc
;
3616 char *error_message
;
3618 = (template_sequence
[stub_reloc_idx
[i
]].r_type
!= R_ARM_THM_XPC22
)
3619 ? STT_ARM_TFUNC
: 0;
3620 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
;
3622 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
3623 rel
.r_info
= ELF32_R_INFO (0,
3624 template_sequence
[stub_reloc_idx
[i
]].r_type
);
3625 rel
.r_addend
= template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
3627 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
3628 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
3629 template should refer back to the instruction after the original
3631 points_to
= sym_value
;
3633 /* There may be unintended consequences if this is not true. */
3634 BFD_ASSERT (stub_entry
->h
== NULL
);
3636 /* Note: _bfd_final_link_relocate doesn't handle these relocations
3637 properly. We should probably use this function unconditionally,
3638 rather than only for certain relocations listed in the enclosing
3639 conditional, for the sake of consistency. */
3640 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3641 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
3642 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
3643 points_to
, info
, stub_entry
->target_section
, "", sym_flags
,
3644 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
3649 Elf_Internal_Rela rel
;
3650 bfd_boolean unresolved_reloc
;
3651 char *error_message
;
3652 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
3653 + template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
3655 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
3656 rel
.r_info
= ELF32_R_INFO (0,
3657 template_sequence
[stub_reloc_idx
[i
]].r_type
);
3660 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3661 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
3662 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
3663 points_to
, info
, stub_entry
->target_section
, "", stub_entry
->st_type
,
3664 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
3672 /* Calculate the template, template size and instruction size for a stub.
3673 Return value is the instruction size. */
3676 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
3677 const insn_sequence
**stub_template
,
3678 int *stub_template_size
)
3680 const insn_sequence
*template_sequence
= NULL
;
3681 int template_size
= 0, i
;
3684 template_sequence
= stub_definitions
[stub_type
].template_sequence
;
3685 template_size
= stub_definitions
[stub_type
].template_size
;
3688 for (i
= 0; i
< template_size
; i
++)
3690 switch (template_sequence
[i
].type
)
3709 *stub_template
= template_sequence
;
3711 if (stub_template_size
)
3712 *stub_template_size
= template_size
;
3717 /* As above, but don't actually build the stub. Just bump offset so
3718 we know stub section sizes. */
3721 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
3724 struct elf32_arm_stub_hash_entry
*stub_entry
;
3725 struct elf32_arm_link_hash_table
*htab
;
3726 const insn_sequence
*template_sequence
;
3727 int template_size
, size
;
3729 /* Massage our args to the form they really have. */
3730 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3731 htab
= (struct elf32_arm_link_hash_table
*) in_arg
;
3733 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
3734 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
3736 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template_sequence
,
3739 stub_entry
->stub_size
= size
;
3740 stub_entry
->stub_template
= template_sequence
;
3741 stub_entry
->stub_template_size
= template_size
;
3743 size
= (size
+ 7) & ~7;
3744 stub_entry
->stub_sec
->size
+= size
;
3749 /* External entry points for sizing and building linker stubs. */
3751 /* Set up various things so that we can make a list of input sections
3752 for each output section included in the link. Returns -1 on error,
3753 0 when no stubs will be needed, and 1 on success. */
3756 elf32_arm_setup_section_lists (bfd
*output_bfd
,
3757 struct bfd_link_info
*info
)
3760 unsigned int bfd_count
;
3761 int top_id
, top_index
;
3763 asection
**input_list
, **list
;
3765 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3769 if (! is_elf_hash_table (htab
))
3772 /* Count the number of input BFDs and find the top input section id. */
3773 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3775 input_bfd
= input_bfd
->link_next
)
3778 for (section
= input_bfd
->sections
;
3780 section
= section
->next
)
3782 if (top_id
< section
->id
)
3783 top_id
= section
->id
;
3786 htab
->bfd_count
= bfd_count
;
3788 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3789 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
3790 if (htab
->stub_group
== NULL
)
3792 htab
->top_id
= top_id
;
3794 /* We can't use output_bfd->section_count here to find the top output
3795 section index as some sections may have been removed, and
3796 _bfd_strip_section_from_output doesn't renumber the indices. */
3797 for (section
= output_bfd
->sections
, top_index
= 0;
3799 section
= section
->next
)
3801 if (top_index
< section
->index
)
3802 top_index
= section
->index
;
3805 htab
->top_index
= top_index
;
3806 amt
= sizeof (asection
*) * (top_index
+ 1);
3807 input_list
= (asection
**) bfd_malloc (amt
);
3808 htab
->input_list
= input_list
;
3809 if (input_list
== NULL
)
3812 /* For sections we aren't interested in, mark their entries with a
3813 value we can check later. */
3814 list
= input_list
+ top_index
;
3816 *list
= bfd_abs_section_ptr
;
3817 while (list
-- != input_list
);
3819 for (section
= output_bfd
->sections
;
3821 section
= section
->next
)
3823 if ((section
->flags
& SEC_CODE
) != 0)
3824 input_list
[section
->index
] = NULL
;
3830 /* The linker repeatedly calls this function for each input section,
3831 in the order that input sections are linked into output sections.
3832 Build lists of input sections to determine groupings between which
3833 we may insert linker stubs. */
3836 elf32_arm_next_input_section (struct bfd_link_info
*info
,
3839 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3844 if (isec
->output_section
->index
<= htab
->top_index
)
3846 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3848 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
3850 /* Steal the link_sec pointer for our list. */
3851 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3852 /* This happens to make the list in reverse order,
3853 which we reverse later. */
3854 PREV_SEC (isec
) = *list
;
3860 /* See whether we can group stub sections together. Grouping stub
3861 sections may result in fewer stubs. More importantly, we need to
3862 put all .init* and .fini* stubs at the end of the .init or
3863 .fini output sections respectively, because glibc splits the
3864 _init and _fini functions into multiple parts. Putting a stub in
3865 the middle of a function is not a good idea. */
3868 group_sections (struct elf32_arm_link_hash_table
*htab
,
3869 bfd_size_type stub_group_size
,
3870 bfd_boolean stubs_always_after_branch
)
3872 asection
**list
= htab
->input_list
;
3876 asection
*tail
= *list
;
3879 if (tail
== bfd_abs_section_ptr
)
3882 /* Reverse the list: we must avoid placing stubs at the
3883 beginning of the section because the beginning of the text
3884 section may be required for an interrupt vector in bare metal
3886 #define NEXT_SEC PREV_SEC
3888 while (tail
!= NULL
)
3890 /* Pop from tail. */
3891 asection
*item
= tail
;
3892 tail
= PREV_SEC (item
);
3895 NEXT_SEC (item
) = head
;
3899 while (head
!= NULL
)
3903 bfd_vma stub_group_start
= head
->output_offset
;
3904 bfd_vma end_of_next
;
3907 while (NEXT_SEC (curr
) != NULL
)
3909 next
= NEXT_SEC (curr
);
3910 end_of_next
= next
->output_offset
+ next
->size
;
3911 if (end_of_next
- stub_group_start
>= stub_group_size
)
3912 /* End of NEXT is too far from start, so stop. */
3914 /* Add NEXT to the group. */
3918 /* OK, the size from the start to the start of CURR is less
3919 than stub_group_size and thus can be handled by one stub
3920 section. (Or the head section is itself larger than
3921 stub_group_size, in which case we may be toast.)
3922 We should really be keeping track of the total size of
3923 stubs added here, as stubs contribute to the final output
3927 next
= NEXT_SEC (head
);
3928 /* Set up this stub group. */
3929 htab
->stub_group
[head
->id
].link_sec
= curr
;
3931 while (head
!= curr
&& (head
= next
) != NULL
);
3933 /* But wait, there's more! Input sections up to stub_group_size
3934 bytes after the stub section can be handled by it too. */
3935 if (!stubs_always_after_branch
)
3937 stub_group_start
= curr
->output_offset
+ curr
->size
;
3939 while (next
!= NULL
)
3941 end_of_next
= next
->output_offset
+ next
->size
;
3942 if (end_of_next
- stub_group_start
>= stub_group_size
)
3943 /* End of NEXT is too far from stubs, so stop. */
3945 /* Add NEXT to the stub group. */
3947 next
= NEXT_SEC (head
);
3948 htab
->stub_group
[head
->id
].link_sec
= curr
;
3954 while (list
++ != htab
->input_list
+ htab
->top_index
);
3956 free (htab
->input_list
);
3961 /* Comparison function for sorting/searching relocations relating to Cortex-A8
3965 a8_reloc_compare (const void *a
, const void *b
)
3967 const struct a8_erratum_reloc
*ra
= (const struct a8_erratum_reloc
*) a
;
3968 const struct a8_erratum_reloc
*rb
= (const struct a8_erratum_reloc
*) b
;
3970 if (ra
->from
< rb
->from
)
3972 else if (ra
->from
> rb
->from
)
3978 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
3979 const char *, char **);
3981 /* Helper function to scan code for sequences which might trigger the Cortex-A8
3982 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
3983 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
3987 cortex_a8_erratum_scan (bfd
*input_bfd
,
3988 struct bfd_link_info
*info
,
3989 struct a8_erratum_fix
**a8_fixes_p
,
3990 unsigned int *num_a8_fixes_p
,
3991 unsigned int *a8_fix_table_size_p
,
3992 struct a8_erratum_reloc
*a8_relocs
,
3993 unsigned int num_a8_relocs
,
3994 unsigned prev_num_a8_fixes
,
3995 bfd_boolean
*stub_changed_p
)
3998 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3999 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
4000 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
4001 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
4006 for (section
= input_bfd
->sections
;
4008 section
= section
->next
)
4010 bfd_byte
*contents
= NULL
;
4011 struct _arm_elf_section_data
*sec_data
;
4015 if (elf_section_type (section
) != SHT_PROGBITS
4016 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
4017 || (section
->flags
& SEC_EXCLUDE
) != 0
4018 || (section
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
4019 || (section
->output_section
== bfd_abs_section_ptr
))
4022 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
4024 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
4025 contents
= elf_section_data (section
)->this_hdr
.contents
;
4026 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
4029 sec_data
= elf32_arm_section_data (section
);
4031 for (span
= 0; span
< sec_data
->mapcount
; span
++)
4033 unsigned int span_start
= sec_data
->map
[span
].vma
;
4034 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
4035 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
4037 char span_type
= sec_data
->map
[span
].type
;
4038 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
4040 if (span_type
!= 't')
4043 /* Span is entirely within a single 4KB region: skip scanning. */
4044 if (((base_vma
+ span_start
) & ~0xfff)
4045 == ((base_vma
+ span_end
) & ~0xfff))
4048 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4050 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4051 * The branch target is in the same 4KB region as the
4052 first half of the branch.
4053 * The instruction before the branch is a 32-bit
4054 length non-branch instruction. */
4055 for (i
= span_start
; i
< span_end
;)
4057 unsigned int insn
= bfd_getl16 (&contents
[i
]);
4058 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
4059 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
4061 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
4066 /* Load the rest of the insn (in manual-friendly order). */
4067 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
4069 /* Encoding T4: B<c>.W. */
4070 is_b
= (insn
& 0xf800d000) == 0xf0009000;
4071 /* Encoding T1: BL<c>.W. */
4072 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
4073 /* Encoding T2: BLX<c>.W. */
4074 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
4075 /* Encoding T3: B<c>.W (not permitted in IT block). */
4076 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
4077 && (insn
& 0x07f00000) != 0x03800000;
4080 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
4082 if (((base_vma
+ i
) & 0xfff) == 0xffe
4086 && ! last_was_branch
)
4088 bfd_signed_vma offset
= 0;
4089 bfd_boolean force_target_arm
= FALSE
;
4090 bfd_boolean force_target_thumb
= FALSE
;
4092 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
4093 struct a8_erratum_reloc key
, *found
;
4095 key
.from
= base_vma
+ i
;
4096 found
= (struct a8_erratum_reloc
*)
4097 bsearch (&key
, a8_relocs
, num_a8_relocs
,
4098 sizeof (struct a8_erratum_reloc
),
4103 char *error_message
= NULL
;
4104 struct elf_link_hash_entry
*entry
;
4105 bfd_boolean use_plt
= FALSE
;
4107 /* We don't care about the error returned from this
4108 function, only if there is glue or not. */
4109 entry
= find_thumb_glue (info
, found
->sym_name
,
4113 found
->non_a8_stub
= TRUE
;
4115 /* Keep a simpler condition, for the sake of clarity. */
4116 if (htab
->splt
!= NULL
&& found
->hash
!= NULL
4117 && found
->hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4120 if (found
->r_type
== R_ARM_THM_CALL
)
4122 if (found
->st_type
!= STT_ARM_TFUNC
|| use_plt
)
4123 force_target_arm
= TRUE
;
4125 force_target_thumb
= TRUE
;
4129 /* Check if we have an offending branch instruction. */
4131 if (found
&& found
->non_a8_stub
)
4132 /* We've already made a stub for this instruction, e.g.
4133 it's a long branch or a Thumb->ARM stub. Assume that
4134 stub will suffice to work around the A8 erratum (see
4135 setting of always_after_branch above). */
4139 offset
= (insn
& 0x7ff) << 1;
4140 offset
|= (insn
& 0x3f0000) >> 4;
4141 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
4142 offset
|= (insn
& 0x800) ? 0x80000 : 0;
4143 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
4144 if (offset
& 0x100000)
4145 offset
|= ~ ((bfd_signed_vma
) 0xfffff);
4146 stub_type
= arm_stub_a8_veneer_b_cond
;
4148 else if (is_b
|| is_bl
|| is_blx
)
4150 int s
= (insn
& 0x4000000) != 0;
4151 int j1
= (insn
& 0x2000) != 0;
4152 int j2
= (insn
& 0x800) != 0;
4156 offset
= (insn
& 0x7ff) << 1;
4157 offset
|= (insn
& 0x3ff0000) >> 4;
4161 if (offset
& 0x1000000)
4162 offset
|= ~ ((bfd_signed_vma
) 0xffffff);
4165 offset
&= ~ ((bfd_signed_vma
) 3);
4167 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
4168 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
4171 if (stub_type
!= arm_stub_none
)
4173 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
4175 /* The original instruction is a BL, but the target is
4176 an ARM instruction. If we were not making a stub,
4177 the BL would have been converted to a BLX. Use the
4178 BLX stub instead in that case. */
4179 if (htab
->use_blx
&& force_target_arm
4180 && stub_type
== arm_stub_a8_veneer_bl
)
4182 stub_type
= arm_stub_a8_veneer_blx
;
4186 /* Conversely, if the original instruction was
4187 BLX but the target is Thumb mode, use the BL
4189 else if (force_target_thumb
4190 && stub_type
== arm_stub_a8_veneer_blx
)
4192 stub_type
= arm_stub_a8_veneer_bl
;
4198 pc_for_insn
&= ~ ((bfd_vma
) 3);
4200 /* If we found a relocation, use the proper destination,
4201 not the offset in the (unrelocated) instruction.
4202 Note this is always done if we switched the stub type
4206 (bfd_signed_vma
) (found
->destination
- pc_for_insn
);
4208 target
= pc_for_insn
+ offset
;
4210 /* The BLX stub is ARM-mode code. Adjust the offset to
4211 take the different PC value (+8 instead of +4) into
4213 if (stub_type
== arm_stub_a8_veneer_blx
)
4216 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
4218 char *stub_name
= NULL
;
4220 if (num_a8_fixes
== a8_fix_table_size
)
4222 a8_fix_table_size
*= 2;
4223 a8_fixes
= (struct a8_erratum_fix
*)
4224 bfd_realloc (a8_fixes
,
4225 sizeof (struct a8_erratum_fix
)
4226 * a8_fix_table_size
);
4229 if (num_a8_fixes
< prev_num_a8_fixes
)
4231 /* If we're doing a subsequent scan,
4232 check if we've found the same fix as
4233 before, and try and reuse the stub
4235 stub_name
= a8_fixes
[num_a8_fixes
].stub_name
;
4236 if ((a8_fixes
[num_a8_fixes
].section
!= section
)
4237 || (a8_fixes
[num_a8_fixes
].offset
!= i
))
4241 *stub_changed_p
= TRUE
;
4247 stub_name
= (char *) bfd_malloc (8 + 1 + 8 + 1);
4248 if (stub_name
!= NULL
)
4249 sprintf (stub_name
, "%x:%x", section
->id
, i
);
4252 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
4253 a8_fixes
[num_a8_fixes
].section
= section
;
4254 a8_fixes
[num_a8_fixes
].offset
= i
;
4255 a8_fixes
[num_a8_fixes
].addend
= offset
;
4256 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
4257 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
4258 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
4259 a8_fixes
[num_a8_fixes
].st_type
=
4260 is_blx
? STT_FUNC
: STT_ARM_TFUNC
;
4267 i
+= insn_32bit
? 4 : 2;
4268 last_was_32bit
= insn_32bit
;
4269 last_was_branch
= is_32bit_branch
;
4273 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4277 *a8_fixes_p
= a8_fixes
;
4278 *num_a8_fixes_p
= num_a8_fixes
;
4279 *a8_fix_table_size_p
= a8_fix_table_size
;
4284 /* Determine and set the size of the stub section for a final link.
4286 The basic idea here is to examine all the relocations looking for
4287 PC-relative calls to a target that is unreachable with a "bl"
4291 elf32_arm_size_stubs (bfd
*output_bfd
,
4293 struct bfd_link_info
*info
,
4294 bfd_signed_vma group_size
,
4295 asection
* (*add_stub_section
) (const char *, asection
*),
4296 void (*layout_sections_again
) (void))
4298 bfd_size_type stub_group_size
;
4299 bfd_boolean stubs_always_after_branch
;
4300 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4301 struct a8_erratum_fix
*a8_fixes
= NULL
;
4302 unsigned int num_a8_fixes
= 0, a8_fix_table_size
= 10;
4303 struct a8_erratum_reloc
*a8_relocs
= NULL
;
4304 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
4309 if (htab
->fix_cortex_a8
)
4311 a8_fixes
= (struct a8_erratum_fix
*)
4312 bfd_zmalloc (sizeof (struct a8_erratum_fix
) * a8_fix_table_size
);
4313 a8_relocs
= (struct a8_erratum_reloc
*)
4314 bfd_zmalloc (sizeof (struct a8_erratum_reloc
) * a8_reloc_table_size
);
4317 /* Propagate mach to stub bfd, because it may not have been
4318 finalized when we created stub_bfd. */
4319 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4320 bfd_get_mach (output_bfd
));
4322 /* Stash our params away. */
4323 htab
->stub_bfd
= stub_bfd
;
4324 htab
->add_stub_section
= add_stub_section
;
4325 htab
->layout_sections_again
= layout_sections_again
;
4326 stubs_always_after_branch
= group_size
< 0;
4328 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4329 as the first half of a 32-bit branch straddling two 4K pages. This is a
4330 crude way of enforcing that. */
4331 if (htab
->fix_cortex_a8
)
4332 stubs_always_after_branch
= 1;
4335 stub_group_size
= -group_size
;
4337 stub_group_size
= group_size
;
4339 if (stub_group_size
== 1)
4341 /* Default values. */
4342 /* Thumb branch range is +-4MB has to be used as the default
4343 maximum size (a given section can contain both ARM and Thumb
4344 code, so the worst case has to be taken into account).
4346 This value is 24K less than that, which allows for 2025
4347 12-byte stubs. If we exceed that, then we will fail to link.
4348 The user will have to relink with an explicit group size
4350 stub_group_size
= 4170000;
4353 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
4355 /* If we're applying the cortex A8 fix, we need to determine the
4356 program header size now, because we cannot change it later --
4357 that could alter section placements. Notice the A8 erratum fix
4358 ends up requiring the section addresses to remain unchanged
4359 modulo the page size. That's something we cannot represent
4360 inside BFD, and we don't want to force the section alignment to
4361 be the page size. */
4362 if (htab
->fix_cortex_a8
)
4363 (*htab
->layout_sections_again
) ();
4368 unsigned int bfd_indx
;
4370 bfd_boolean stub_changed
= FALSE
;
4371 unsigned prev_num_a8_fixes
= num_a8_fixes
;
4374 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4376 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4378 Elf_Internal_Shdr
*symtab_hdr
;
4380 Elf_Internal_Sym
*local_syms
= NULL
;
4384 /* We'll need the symbol table in a second. */
4385 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4386 if (symtab_hdr
->sh_info
== 0)
4389 /* Walk over each section attached to the input bfd. */
4390 for (section
= input_bfd
->sections
;
4392 section
= section
->next
)
4394 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4396 /* If there aren't any relocs, then there's nothing more
4398 if ((section
->flags
& SEC_RELOC
) == 0
4399 || section
->reloc_count
== 0
4400 || (section
->flags
& SEC_CODE
) == 0)
4403 /* If this section is a link-once section that will be
4404 discarded, then don't create any stubs. */
4405 if (section
->output_section
== NULL
4406 || section
->output_section
->owner
!= output_bfd
)
4409 /* Get the relocs. */
4411 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
4412 NULL
, info
->keep_memory
);
4413 if (internal_relocs
== NULL
)
4414 goto error_ret_free_local
;
4416 /* Now examine each relocation. */
4417 irela
= internal_relocs
;
4418 irelaend
= irela
+ section
->reloc_count
;
4419 for (; irela
< irelaend
; irela
++)
4421 unsigned int r_type
, r_indx
;
4422 enum elf32_arm_stub_type stub_type
;
4423 struct elf32_arm_stub_hash_entry
*stub_entry
;
4426 bfd_vma destination
;
4427 struct elf32_arm_link_hash_entry
*hash
;
4428 const char *sym_name
;
4430 const asection
*id_sec
;
4432 bfd_boolean created_stub
= FALSE
;
4434 r_type
= ELF32_R_TYPE (irela
->r_info
);
4435 r_indx
= ELF32_R_SYM (irela
->r_info
);
4437 if (r_type
>= (unsigned int) R_ARM_max
)
4439 bfd_set_error (bfd_error_bad_value
);
4440 error_ret_free_internal
:
4441 if (elf_section_data (section
)->relocs
== NULL
)
4442 free (internal_relocs
);
4443 goto error_ret_free_local
;
4446 /* Only look for stubs on branch instructions. */
4447 if ((r_type
!= (unsigned int) R_ARM_CALL
)
4448 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
4449 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
4450 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
4451 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
4452 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
4453 && (r_type
!= (unsigned int) R_ARM_PLT32
))
4456 /* Now determine the call target, its name, value,
4463 if (r_indx
< symtab_hdr
->sh_info
)
4465 /* It's a local symbol. */
4466 Elf_Internal_Sym
*sym
;
4467 Elf_Internal_Shdr
*hdr
;
4469 if (local_syms
== NULL
)
4472 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4473 if (local_syms
== NULL
)
4475 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4476 symtab_hdr
->sh_info
, 0,
4478 if (local_syms
== NULL
)
4479 goto error_ret_free_internal
;
4482 sym
= local_syms
+ r_indx
;
4483 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4484 sym_sec
= hdr
->bfd_section
;
4486 /* This is an undefined symbol. It can never
4490 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4491 sym_value
= sym
->st_value
;
4492 destination
= (sym_value
+ irela
->r_addend
4493 + sym_sec
->output_offset
4494 + sym_sec
->output_section
->vma
);
4495 st_type
= ELF_ST_TYPE (sym
->st_info
);
4497 = bfd_elf_string_from_elf_section (input_bfd
,
4498 symtab_hdr
->sh_link
,
4503 /* It's an external symbol. */
4506 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4507 hash
= ((struct elf32_arm_link_hash_entry
*)
4508 elf_sym_hashes (input_bfd
)[e_indx
]);
4510 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4511 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4512 hash
= ((struct elf32_arm_link_hash_entry
*)
4513 hash
->root
.root
.u
.i
.link
);
4515 if (hash
->root
.root
.type
== bfd_link_hash_defined
4516 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4518 sym_sec
= hash
->root
.root
.u
.def
.section
;
4519 sym_value
= hash
->root
.root
.u
.def
.value
;
4521 struct elf32_arm_link_hash_table
*globals
=
4522 elf32_arm_hash_table (info
);
4524 /* For a destination in a shared library,
4525 use the PLT stub as target address to
4526 decide whether a branch stub is
4529 && globals
->splt
!= NULL
4531 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4533 sym_sec
= globals
->splt
;
4534 sym_value
= hash
->root
.plt
.offset
;
4535 if (sym_sec
->output_section
!= NULL
)
4536 destination
= (sym_value
4537 + sym_sec
->output_offset
4538 + sym_sec
->output_section
->vma
);
4540 else if (sym_sec
->output_section
!= NULL
)
4541 destination
= (sym_value
+ irela
->r_addend
4542 + sym_sec
->output_offset
4543 + sym_sec
->output_section
->vma
);
4545 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
4546 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
4548 /* For a shared library, use the PLT stub as
4549 target address to decide whether a long
4550 branch stub is needed.
4551 For absolute code, they cannot be handled. */
4552 struct elf32_arm_link_hash_table
*globals
=
4553 elf32_arm_hash_table (info
);
4556 && globals
->splt
!= NULL
4558 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4560 sym_sec
= globals
->splt
;
4561 sym_value
= hash
->root
.plt
.offset
;
4562 if (sym_sec
->output_section
!= NULL
)
4563 destination
= (sym_value
4564 + sym_sec
->output_offset
4565 + sym_sec
->output_section
->vma
);
4572 bfd_set_error (bfd_error_bad_value
);
4573 goto error_ret_free_internal
;
4575 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4576 sym_name
= hash
->root
.root
.root
.string
;
4581 /* Determine what (if any) linker stub is needed. */
4582 stub_type
= arm_type_of_stub (info
, section
, irela
,
4584 destination
, sym_sec
,
4585 input_bfd
, sym_name
);
4586 if (stub_type
== arm_stub_none
)
4589 /* Support for grouping stub sections. */
4590 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4592 /* Get the name of this stub. */
4593 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
,
4596 goto error_ret_free_internal
;
4598 /* We've either created a stub for this reloc already,
4599 or we are about to. */
4600 created_stub
= TRUE
;
4602 stub_entry
= arm_stub_hash_lookup
4603 (&htab
->stub_hash_table
, stub_name
,
4605 if (stub_entry
!= NULL
)
4607 /* The proper stub has already been created. */
4609 stub_entry
->target_value
= sym_value
;
4613 stub_entry
= elf32_arm_add_stub (stub_name
, section
,
4615 if (stub_entry
== NULL
)
4618 goto error_ret_free_internal
;
4621 stub_entry
->target_value
= sym_value
;
4622 stub_entry
->target_section
= sym_sec
;
4623 stub_entry
->stub_type
= stub_type
;
4624 stub_entry
->h
= hash
;
4625 stub_entry
->st_type
= st_type
;
4627 if (sym_name
== NULL
)
4628 sym_name
= "unnamed";
4629 stub_entry
->output_name
= (char *)
4630 bfd_alloc (htab
->stub_bfd
,
4631 sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
4632 + strlen (sym_name
));
4633 if (stub_entry
->output_name
== NULL
)
4636 goto error_ret_free_internal
;
4639 /* For historical reasons, use the existing names for
4640 ARM-to-Thumb and Thumb-to-ARM stubs. */
4641 if ( ((r_type
== (unsigned int) R_ARM_THM_CALL
)
4642 || (r_type
== (unsigned int) R_ARM_THM_JUMP24
))
4643 && st_type
!= STT_ARM_TFUNC
)
4644 sprintf (stub_entry
->output_name
,
4645 THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
4646 else if ( ((r_type
== (unsigned int) R_ARM_CALL
)
4647 || (r_type
== (unsigned int) R_ARM_JUMP24
))
4648 && st_type
== STT_ARM_TFUNC
)
4649 sprintf (stub_entry
->output_name
,
4650 ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
4652 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
,
4655 stub_changed
= TRUE
;
4659 /* Look for relocations which might trigger Cortex-A8
4661 if (htab
->fix_cortex_a8
4662 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
4663 || r_type
== (unsigned int) R_ARM_THM_JUMP19
4664 || r_type
== (unsigned int) R_ARM_THM_CALL
4665 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
4667 bfd_vma from
= section
->output_section
->vma
4668 + section
->output_offset
4671 if ((from
& 0xfff) == 0xffe)
4673 /* Found a candidate. Note we haven't checked the
4674 destination is within 4K here: if we do so (and
4675 don't create an entry in a8_relocs) we can't tell
4676 that a branch should have been relocated when
4678 if (num_a8_relocs
== a8_reloc_table_size
)
4680 a8_reloc_table_size
*= 2;
4681 a8_relocs
= (struct a8_erratum_reloc
*)
4682 bfd_realloc (a8_relocs
,
4683 sizeof (struct a8_erratum_reloc
)
4684 * a8_reloc_table_size
);
4687 a8_relocs
[num_a8_relocs
].from
= from
;
4688 a8_relocs
[num_a8_relocs
].destination
= destination
;
4689 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
4690 a8_relocs
[num_a8_relocs
].st_type
= st_type
;
4691 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
4692 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
4693 a8_relocs
[num_a8_relocs
].hash
= hash
;
4700 /* We're done with the internal relocs, free them. */
4701 if (elf_section_data (section
)->relocs
== NULL
)
4702 free (internal_relocs
);
4705 if (htab
->fix_cortex_a8
)
4707 /* Sort relocs which might apply to Cortex-A8 erratum. */
4708 qsort (a8_relocs
, num_a8_relocs
,
4709 sizeof (struct a8_erratum_reloc
),
4712 /* Scan for branches which might trigger Cortex-A8 erratum. */
4713 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
4714 &num_a8_fixes
, &a8_fix_table_size
,
4715 a8_relocs
, num_a8_relocs
,
4716 prev_num_a8_fixes
, &stub_changed
)
4718 goto error_ret_free_local
;
4722 if (prev_num_a8_fixes
!= num_a8_fixes
)
4723 stub_changed
= TRUE
;
4728 /* OK, we've added some stubs. Find out the new size of the
4730 for (stub_sec
= htab
->stub_bfd
->sections
;
4732 stub_sec
= stub_sec
->next
)
4734 /* Ignore non-stub sections. */
4735 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4741 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
4743 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
4744 if (htab
->fix_cortex_a8
)
4745 for (i
= 0; i
< num_a8_fixes
; i
++)
4747 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
4748 a8_fixes
[i
].section
, htab
);
4750 if (stub_sec
== NULL
)
4751 goto error_ret_free_local
;
4754 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
4759 /* Ask the linker to do its stuff. */
4760 (*htab
->layout_sections_again
) ();
4763 /* Add stubs for Cortex-A8 erratum fixes now. */
4764 if (htab
->fix_cortex_a8
)
4766 for (i
= 0; i
< num_a8_fixes
; i
++)
4768 struct elf32_arm_stub_hash_entry
*stub_entry
;
4769 char *stub_name
= a8_fixes
[i
].stub_name
;
4770 asection
*section
= a8_fixes
[i
].section
;
4771 unsigned int section_id
= a8_fixes
[i
].section
->id
;
4772 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
4773 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
4774 const insn_sequence
*template_sequence
;
4775 int template_size
, size
= 0;
4777 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
4779 if (stub_entry
== NULL
)
4781 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
4787 stub_entry
->stub_sec
= stub_sec
;
4788 stub_entry
->stub_offset
= 0;
4789 stub_entry
->id_sec
= link_sec
;
4790 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
4791 stub_entry
->target_section
= a8_fixes
[i
].section
;
4792 stub_entry
->target_value
= a8_fixes
[i
].offset
;
4793 stub_entry
->target_addend
= a8_fixes
[i
].addend
;
4794 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
4795 stub_entry
->st_type
= a8_fixes
[i
].st_type
;
4797 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
,
4801 stub_entry
->stub_size
= size
;
4802 stub_entry
->stub_template
= template_sequence
;
4803 stub_entry
->stub_template_size
= template_size
;
4806 /* Stash the Cortex-A8 erratum fix array for use later in
4807 elf32_arm_write_section(). */
4808 htab
->a8_erratum_fixes
= a8_fixes
;
4809 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
4813 htab
->a8_erratum_fixes
= NULL
;
4814 htab
->num_a8_erratum_fixes
= 0;
4818 error_ret_free_local
:
4822 /* Build all the stubs associated with the current output file. The
4823 stubs are kept in a hash table attached to the main linker hash
4824 table. We also set up the .plt entries for statically linked PIC
4825 functions here. This function is called via arm_elf_finish in the
4829 elf32_arm_build_stubs (struct bfd_link_info
*info
)
4832 struct bfd_hash_table
*table
;
4833 struct elf32_arm_link_hash_table
*htab
;
4835 htab
= elf32_arm_hash_table (info
);
4839 for (stub_sec
= htab
->stub_bfd
->sections
;
4841 stub_sec
= stub_sec
->next
)
4845 /* Ignore non-stub sections. */
4846 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4849 /* Allocate memory to hold the linker stubs. */
4850 size
= stub_sec
->size
;
4851 stub_sec
->contents
= (unsigned char *) bfd_zalloc (htab
->stub_bfd
, size
);
4852 if (stub_sec
->contents
== NULL
&& size
!= 0)
4857 /* Build the stubs as directed by the stub hash table. */
4858 table
= &htab
->stub_hash_table
;
4859 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
4860 if (htab
->fix_cortex_a8
)
4862 /* Place the cortex a8 stubs last. */
4863 htab
->fix_cortex_a8
= -1;
4864 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
4870 /* Locate the Thumb encoded calling stub for NAME. */
4872 static struct elf_link_hash_entry
*
4873 find_thumb_glue (struct bfd_link_info
*link_info
,
4875 char **error_message
)
4878 struct elf_link_hash_entry
*hash
;
4879 struct elf32_arm_link_hash_table
*hash_table
;
4881 /* We need a pointer to the armelf specific hash table. */
4882 hash_table
= elf32_arm_hash_table (link_info
);
4883 if (hash_table
== NULL
)
4886 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
4887 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
4889 BFD_ASSERT (tmp_name
);
4891 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
4893 hash
= elf_link_hash_lookup
4894 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4897 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
4898 tmp_name
, name
) == -1)
4899 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
4906 /* Locate the ARM encoded calling stub for NAME. */
4908 static struct elf_link_hash_entry
*
4909 find_arm_glue (struct bfd_link_info
*link_info
,
4911 char **error_message
)
4914 struct elf_link_hash_entry
*myh
;
4915 struct elf32_arm_link_hash_table
*hash_table
;
4917 /* We need a pointer to the elfarm specific hash table. */
4918 hash_table
= elf32_arm_hash_table (link_info
);
4919 if (hash_table
== NULL
)
4922 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
4923 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
4925 BFD_ASSERT (tmp_name
);
4927 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
4929 myh
= elf_link_hash_lookup
4930 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4933 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
4934 tmp_name
, name
) == -1)
4935 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
4942 /* ARM->Thumb glue (static images):
4946 ldr r12, __func_addr
4949 .word func @ behave as if you saw a ARM_32 reloc.
4956 .word func @ behave as if you saw a ARM_32 reloc.
4958 (relocatable images)
4961 ldr r12, __func_offset
4967 #define ARM2THUMB_STATIC_GLUE_SIZE 12
4968 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
4969 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
4970 static const insn32 a2t3_func_addr_insn
= 0x00000001;
4972 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
4973 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
4974 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
4976 #define ARM2THUMB_PIC_GLUE_SIZE 16
4977 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
4978 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
4979 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
4981 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
4985 __func_from_thumb: __func_from_thumb:
4987 nop ldr r6, __func_addr
4997 #define THUMB2ARM_GLUE_SIZE 8
4998 static const insn16 t2a1_bx_pc_insn
= 0x4778;
4999 static const insn16 t2a2_noop_insn
= 0x46c0;
5000 static const insn32 t2a3_b_insn
= 0xea000000;
5002 #define VFP11_ERRATUM_VENEER_SIZE 8
5004 #define ARM_BX_VENEER_SIZE 12
5005 static const insn32 armbx1_tst_insn
= 0xe3100001;
5006 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
5007 static const insn32 armbx3_bx_insn
= 0xe12fff10;
5009 #ifndef ELFARM_NABI_C_INCLUDED
5011 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
5014 bfd_byte
* contents
;
5018 /* Do not include empty glue sections in the output. */
5021 s
= bfd_get_section_by_name (abfd
, name
);
5023 s
->flags
|= SEC_EXCLUDE
;
5028 BFD_ASSERT (abfd
!= NULL
);
5030 s
= bfd_get_section_by_name (abfd
, name
);
5031 BFD_ASSERT (s
!= NULL
);
5033 contents
= (bfd_byte
*) bfd_alloc (abfd
, size
);
5035 BFD_ASSERT (s
->size
== size
);
5036 s
->contents
= contents
;
5040 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
5042 struct elf32_arm_link_hash_table
* globals
;
5044 globals
= elf32_arm_hash_table (info
);
5045 BFD_ASSERT (globals
!= NULL
);
5047 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5048 globals
->arm_glue_size
,
5049 ARM2THUMB_GLUE_SECTION_NAME
);
5051 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5052 globals
->thumb_glue_size
,
5053 THUMB2ARM_GLUE_SECTION_NAME
);
5055 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5056 globals
->vfp11_erratum_glue_size
,
5057 VFP11_ERRATUM_VENEER_SECTION_NAME
);
5059 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5060 globals
->bx_glue_size
,
5061 ARM_BX_GLUE_SECTION_NAME
);
5066 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5067 returns the symbol identifying the stub. */
5069 static struct elf_link_hash_entry
*
5070 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
5071 struct elf_link_hash_entry
* h
)
5073 const char * name
= h
->root
.root
.string
;
5076 struct elf_link_hash_entry
* myh
;
5077 struct bfd_link_hash_entry
* bh
;
5078 struct elf32_arm_link_hash_table
* globals
;
5082 globals
= elf32_arm_hash_table (link_info
);
5083 BFD_ASSERT (globals
!= NULL
);
5084 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5086 s
= bfd_get_section_by_name
5087 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
5089 BFD_ASSERT (s
!= NULL
);
5091 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5092 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5094 BFD_ASSERT (tmp_name
);
5096 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5098 myh
= elf_link_hash_lookup
5099 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5103 /* We've already seen this guy. */
5108 /* The only trick here is using hash_table->arm_glue_size as the value.
5109 Even though the section isn't allocated yet, this is where we will be
5110 putting it. The +1 on the value marks that the stub has not been
5111 output yet - not that it is a Thumb function. */
5113 val
= globals
->arm_glue_size
+ 1;
5114 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5115 tmp_name
, BSF_GLOBAL
, s
, val
,
5116 NULL
, TRUE
, FALSE
, &bh
);
5118 myh
= (struct elf_link_hash_entry
*) bh
;
5119 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5120 myh
->forced_local
= 1;
5124 if (link_info
->shared
|| globals
->root
.is_relocatable_executable
5125 || globals
->pic_veneer
)
5126 size
= ARM2THUMB_PIC_GLUE_SIZE
;
5127 else if (globals
->use_blx
)
5128 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
5130 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
5133 globals
->arm_glue_size
+= size
;
5138 /* Allocate space for ARMv4 BX veneers. */
5141 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
5144 struct elf32_arm_link_hash_table
*globals
;
5146 struct elf_link_hash_entry
*myh
;
5147 struct bfd_link_hash_entry
*bh
;
5150 /* BX PC does not need a veneer. */
5154 globals
= elf32_arm_hash_table (link_info
);
5155 BFD_ASSERT (globals
!= NULL
);
5156 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5158 /* Check if this veneer has already been allocated. */
5159 if (globals
->bx_glue_offset
[reg
])
5162 s
= bfd_get_section_by_name
5163 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
5165 BFD_ASSERT (s
!= NULL
);
5167 /* Add symbol for veneer. */
5169 bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
5171 BFD_ASSERT (tmp_name
);
5173 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
5175 myh
= elf_link_hash_lookup
5176 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5178 BFD_ASSERT (myh
== NULL
);
5181 val
= globals
->bx_glue_size
;
5182 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5183 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5184 NULL
, TRUE
, FALSE
, &bh
);
5186 myh
= (struct elf_link_hash_entry
*) bh
;
5187 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5188 myh
->forced_local
= 1;
5190 s
->size
+= ARM_BX_VENEER_SIZE
;
5191 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
5192 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
5196 /* Add an entry to the code/data map for section SEC. */
5199 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
5201 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
5202 unsigned int newidx
;
5204 if (sec_data
->map
== NULL
)
5206 sec_data
->map
= (elf32_arm_section_map
*)
5207 bfd_malloc (sizeof (elf32_arm_section_map
));
5208 sec_data
->mapcount
= 0;
5209 sec_data
->mapsize
= 1;
5212 newidx
= sec_data
->mapcount
++;
5214 if (sec_data
->mapcount
> sec_data
->mapsize
)
5216 sec_data
->mapsize
*= 2;
5217 sec_data
->map
= (elf32_arm_section_map
*)
5218 bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
5219 * sizeof (elf32_arm_section_map
));
5224 sec_data
->map
[newidx
].vma
= vma
;
5225 sec_data
->map
[newidx
].type
= type
;
5230 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5231 veneers are handled for now. */
5234 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
5235 elf32_vfp11_erratum_list
*branch
,
5237 asection
*branch_sec
,
5238 unsigned int offset
)
5241 struct elf32_arm_link_hash_table
*hash_table
;
5243 struct elf_link_hash_entry
*myh
;
5244 struct bfd_link_hash_entry
*bh
;
5246 struct _arm_elf_section_data
*sec_data
;
5248 elf32_vfp11_erratum_list
*newerr
;
5250 hash_table
= elf32_arm_hash_table (link_info
);
5251 BFD_ASSERT (hash_table
!= NULL
);
5252 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
5254 s
= bfd_get_section_by_name
5255 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
5257 sec_data
= elf32_arm_section_data (s
);
5259 BFD_ASSERT (s
!= NULL
);
5261 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
5262 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
5264 BFD_ASSERT (tmp_name
);
5266 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
5267 hash_table
->num_vfp11_fixes
);
5269 myh
= elf_link_hash_lookup
5270 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5272 BFD_ASSERT (myh
== NULL
);
5275 val
= hash_table
->vfp11_erratum_glue_size
;
5276 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
5277 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5278 NULL
, TRUE
, FALSE
, &bh
);
5280 myh
= (struct elf_link_hash_entry
*) bh
;
5281 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5282 myh
->forced_local
= 1;
5284 /* Link veneer back to calling location. */
5285 errcount
= ++(sec_data
->erratumcount
);
5286 newerr
= (elf32_vfp11_erratum_list
*)
5287 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5289 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
5291 newerr
->u
.v
.branch
= branch
;
5292 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
5293 branch
->u
.b
.veneer
= newerr
;
5295 newerr
->next
= sec_data
->erratumlist
;
5296 sec_data
->erratumlist
= newerr
;
5298 /* A symbol for the return from the veneer. */
5299 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
5300 hash_table
->num_vfp11_fixes
);
5302 myh
= elf_link_hash_lookup
5303 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5310 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
5311 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
5313 myh
= (struct elf_link_hash_entry
*) bh
;
5314 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5315 myh
->forced_local
= 1;
5319 /* Generate a mapping symbol for the veneer section, and explicitly add an
5320 entry for that symbol to the code/data map for the section. */
5321 if (hash_table
->vfp11_erratum_glue_size
== 0)
5324 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5325 ever requires this erratum fix. */
5326 _bfd_generic_link_add_one_symbol (link_info
,
5327 hash_table
->bfd_of_glue_owner
, "$a",
5328 BSF_LOCAL
, s
, 0, NULL
,
5331 myh
= (struct elf_link_hash_entry
*) bh
;
5332 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
5333 myh
->forced_local
= 1;
5335 /* The elf32_arm_init_maps function only cares about symbols from input
5336 BFDs. We must make a note of this generated mapping symbol
5337 ourselves so that code byteswapping works properly in
5338 elf32_arm_write_section. */
5339 elf32_arm_section_map_add (s
, 'a', 0);
5342 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
5343 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
5344 hash_table
->num_vfp11_fixes
++;
5346 /* The offset of the veneer. */
5350 #define ARM_GLUE_SECTION_FLAGS \
5351 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
5352 | SEC_READONLY | SEC_LINKER_CREATED)
5354 /* Create a fake section for use by the ARM backend of the linker. */
5357 arm_make_glue_section (bfd
* abfd
, const char * name
)
5361 sec
= bfd_get_section_by_name (abfd
, name
);
5366 sec
= bfd_make_section_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
5369 || !bfd_set_section_alignment (abfd
, sec
, 2))
5372 /* Set the gc mark to prevent the section from being removed by garbage
5373 collection, despite the fact that no relocs refer to this section. */
5379 /* Add the glue sections to ABFD. This function is called from the
5380 linker scripts in ld/emultempl/{armelf}.em. */
5383 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
5384 struct bfd_link_info
*info
)
5386 /* If we are only performing a partial
5387 link do not bother adding the glue. */
5388 if (info
->relocatable
)
5391 return arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
5392 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
5393 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
5394 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
5397 /* Select a BFD to be used to hold the sections used by the glue code.
5398 This function is called from the linker scripts in ld/emultempl/
5402 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
5404 struct elf32_arm_link_hash_table
*globals
;
5406 /* If we are only performing a partial link
5407 do not bother getting a bfd to hold the glue. */
5408 if (info
->relocatable
)
5411 /* Make sure we don't attach the glue sections to a dynamic object. */
5412 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
5414 globals
= elf32_arm_hash_table (info
);
5415 BFD_ASSERT (globals
!= NULL
);
5417 if (globals
->bfd_of_glue_owner
!= NULL
)
5420 /* Save the bfd for later use. */
5421 globals
->bfd_of_glue_owner
= abfd
;
5427 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
5429 if (bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
5431 globals
->use_blx
= 1;
5435 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
5436 struct bfd_link_info
*link_info
)
5438 Elf_Internal_Shdr
*symtab_hdr
;
5439 Elf_Internal_Rela
*internal_relocs
= NULL
;
5440 Elf_Internal_Rela
*irel
, *irelend
;
5441 bfd_byte
*contents
= NULL
;
5444 struct elf32_arm_link_hash_table
*globals
;
5446 /* If we are only performing a partial link do not bother
5447 to construct any glue. */
5448 if (link_info
->relocatable
)
5451 /* Here we have a bfd that is to be included on the link. We have a
5452 hook to do reloc rummaging, before section sizes are nailed down. */
5453 globals
= elf32_arm_hash_table (link_info
);
5454 BFD_ASSERT (globals
!= NULL
);
5456 check_use_blx (globals
);
5458 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
5460 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
5465 /* PR 5398: If we have not decided to include any loadable sections in
5466 the output then we will not have a glue owner bfd. This is OK, it
5467 just means that there is nothing else for us to do here. */
5468 if (globals
->bfd_of_glue_owner
== NULL
)
5471 /* Rummage around all the relocs and map the glue vectors. */
5472 sec
= abfd
->sections
;
5477 for (; sec
!= NULL
; sec
= sec
->next
)
5479 if (sec
->reloc_count
== 0)
5482 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
5485 symtab_hdr
= & elf_symtab_hdr (abfd
);
5487 /* Load the relocs. */
5489 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
5491 if (internal_relocs
== NULL
)
5494 irelend
= internal_relocs
+ sec
->reloc_count
;
5495 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
5498 unsigned long r_index
;
5500 struct elf_link_hash_entry
*h
;
5502 r_type
= ELF32_R_TYPE (irel
->r_info
);
5503 r_index
= ELF32_R_SYM (irel
->r_info
);
5505 /* These are the only relocation types we care about. */
5506 if ( r_type
!= R_ARM_PC24
5507 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
5510 /* Get the section contents if we haven't done so already. */
5511 if (contents
== NULL
)
5513 /* Get cached copy if it exists. */
5514 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
5515 contents
= elf_section_data (sec
)->this_hdr
.contents
;
5518 /* Go get them off disk. */
5519 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
5524 if (r_type
== R_ARM_V4BX
)
5528 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
5529 record_arm_bx_glue (link_info
, reg
);
5533 /* If the relocation is not against a symbol it cannot concern us. */
5536 /* We don't care about local symbols. */
5537 if (r_index
< symtab_hdr
->sh_info
)
5540 /* This is an external symbol. */
5541 r_index
-= symtab_hdr
->sh_info
;
5542 h
= (struct elf_link_hash_entry
*)
5543 elf_sym_hashes (abfd
)[r_index
];
5545 /* If the relocation is against a static symbol it must be within
5546 the current section and so cannot be a cross ARM/Thumb relocation. */
5550 /* If the call will go through a PLT entry then we do not need
5552 if (globals
->splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
5558 /* This one is a call from arm code. We need to look up
5559 the target of the call. If it is a thumb target, we
5561 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
5562 record_arm_to_thumb_glue (link_info
, h
);
5570 if (contents
!= NULL
5571 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5575 if (internal_relocs
!= NULL
5576 && elf_section_data (sec
)->relocs
!= internal_relocs
)
5577 free (internal_relocs
);
5578 internal_relocs
= NULL
;
5584 if (contents
!= NULL
5585 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5587 if (internal_relocs
!= NULL
5588 && elf_section_data (sec
)->relocs
!= internal_relocs
)
5589 free (internal_relocs
);
5596 /* Initialise maps of ARM/Thumb/data for input BFDs. */
5599 bfd_elf32_arm_init_maps (bfd
*abfd
)
5601 Elf_Internal_Sym
*isymbuf
;
5602 Elf_Internal_Shdr
*hdr
;
5603 unsigned int i
, localsyms
;
5605 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
5606 if (! is_arm_elf (abfd
))
5609 if ((abfd
->flags
& DYNAMIC
) != 0)
5612 hdr
= & elf_symtab_hdr (abfd
);
5613 localsyms
= hdr
->sh_info
;
5615 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
5616 should contain the number of local symbols, which should come before any
5617 global symbols. Mapping symbols are always local. */
5618 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
5621 /* No internal symbols read? Skip this BFD. */
5622 if (isymbuf
== NULL
)
5625 for (i
= 0; i
< localsyms
; i
++)
5627 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
5628 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5632 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
5634 name
= bfd_elf_string_from_elf_section (abfd
,
5635 hdr
->sh_link
, isym
->st_name
);
5637 if (bfd_is_arm_special_symbol_name (name
,
5638 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
5639 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
5645 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
5646 say what they wanted. */
5649 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
5651 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5652 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
5654 if (globals
== NULL
)
5657 if (globals
->fix_cortex_a8
== -1)
5659 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
5660 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
5661 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
5662 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
5663 globals
->fix_cortex_a8
= 1;
5665 globals
->fix_cortex_a8
= 0;
5671 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
5673 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5674 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
5676 if (globals
== NULL
)
5678 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
5679 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
5681 switch (globals
->vfp11_fix
)
5683 case BFD_ARM_VFP11_FIX_DEFAULT
:
5684 case BFD_ARM_VFP11_FIX_NONE
:
5685 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
5689 /* Give a warning, but do as the user requests anyway. */
5690 (*_bfd_error_handler
) (_("%B: warning: selected VFP11 erratum "
5691 "workaround is not necessary for target architecture"), obfd
);
5694 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
5695 /* For earlier architectures, we might need the workaround, but do not
5696 enable it by default. If users is running with broken hardware, they
5697 must enable the erratum fix explicitly. */
5698 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
5702 enum bfd_arm_vfp11_pipe
5710 /* Return a VFP register number. This is encoded as RX:X for single-precision
5711 registers, or X:RX for double-precision registers, where RX is the group of
5712 four bits in the instruction encoding and X is the single extension bit.
5713 RX and X fields are specified using their lowest (starting) bit. The return
5716 0...31: single-precision registers s0...s31
5717 32...63: double-precision registers d0...d31.
5719 Although X should be zero for VFP11 (encoding d0...d15 only), we might
5720 encounter VFP3 instructions, so we allow the full range for DP registers. */
5723 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
5727 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
5729 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
5732 /* Set bits in *WMASK according to a register number REG as encoded by
5733 bfd_arm_vfp11_regno(). Ignore d16-d31. */
5736 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
5741 *wmask
|= 3 << ((reg
- 32) * 2);
5744 /* Return TRUE if WMASK overwrites anything in REGS. */
5747 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
5751 for (i
= 0; i
< numregs
; i
++)
5753 unsigned int reg
= regs
[i
];
5755 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
5763 if ((wmask
& (3 << (reg
* 2))) != 0)
5770 /* In this function, we're interested in two things: finding input registers
5771 for VFP data-processing instructions, and finding the set of registers which
5772 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
5773 hold the written set, so FLDM etc. are easy to deal with (we're only
5774 interested in 32 SP registers or 16 dp registers, due to the VFP version
5775 implemented by the chip in question). DP registers are marked by setting
5776 both SP registers in the write mask). */
5778 static enum bfd_arm_vfp11_pipe
5779 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
5782 enum bfd_arm_vfp11_pipe vpipe
= VFP11_BAD
;
5783 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
5785 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
5788 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
5789 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
5791 pqrs
= ((insn
& 0x00800000) >> 20)
5792 | ((insn
& 0x00300000) >> 19)
5793 | ((insn
& 0x00000040) >> 6);
5797 case 0: /* fmac[sd]. */
5798 case 1: /* fnmac[sd]. */
5799 case 2: /* fmsc[sd]. */
5800 case 3: /* fnmsc[sd]. */
5802 bfd_arm_vfp11_write_mask (destmask
, fd
);
5804 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
5809 case 4: /* fmul[sd]. */
5810 case 5: /* fnmul[sd]. */
5811 case 6: /* fadd[sd]. */
5812 case 7: /* fsub[sd]. */
5816 case 8: /* fdiv[sd]. */
5819 bfd_arm_vfp11_write_mask (destmask
, fd
);
5820 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
5825 case 15: /* extended opcode. */
5827 unsigned int extn
= ((insn
>> 15) & 0x1e)
5828 | ((insn
>> 7) & 1);
5832 case 0: /* fcpy[sd]. */
5833 case 1: /* fabs[sd]. */
5834 case 2: /* fneg[sd]. */
5835 case 8: /* fcmp[sd]. */
5836 case 9: /* fcmpe[sd]. */
5837 case 10: /* fcmpz[sd]. */
5838 case 11: /* fcmpez[sd]. */
5839 case 16: /* fuito[sd]. */
5840 case 17: /* fsito[sd]. */
5841 case 24: /* ftoui[sd]. */
5842 case 25: /* ftouiz[sd]. */
5843 case 26: /* ftosi[sd]. */
5844 case 27: /* ftosiz[sd]. */
5845 /* These instructions will not bounce due to underflow. */
5850 case 3: /* fsqrt[sd]. */
5851 /* fsqrt cannot underflow, but it can (perhaps) overwrite
5852 registers to cause the erratum in previous instructions. */
5853 bfd_arm_vfp11_write_mask (destmask
, fd
);
5857 case 15: /* fcvt{ds,sd}. */
5861 bfd_arm_vfp11_write_mask (destmask
, fd
);
5863 /* Only FCVTSD can underflow. */
5864 if ((insn
& 0x100) != 0)
5883 /* Two-register transfer. */
5884 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
5886 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
5888 if ((insn
& 0x100000) == 0)
5891 bfd_arm_vfp11_write_mask (destmask
, fm
);
5894 bfd_arm_vfp11_write_mask (destmask
, fm
);
5895 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
5901 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
5903 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
5904 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
5908 case 0: /* Two-reg transfer. We should catch these above. */
5911 case 2: /* fldm[sdx]. */
5915 unsigned int i
, offset
= insn
& 0xff;
5920 for (i
= fd
; i
< fd
+ offset
; i
++)
5921 bfd_arm_vfp11_write_mask (destmask
, i
);
5925 case 4: /* fld[sd]. */
5927 bfd_arm_vfp11_write_mask (destmask
, fd
);
5936 /* Single-register transfer. Note L==0. */
5937 else if ((insn
& 0x0f100e10) == 0x0e000a10)
5939 unsigned int opcode
= (insn
>> 21) & 7;
5940 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
5944 case 0: /* fmsr/fmdlr. */
5945 case 1: /* fmdhr. */
5946 /* Mark fmdhr and fmdlr as writing to the whole of the DP
5947 destination register. I don't know if this is exactly right,
5948 but it is the conservative choice. */
5949 bfd_arm_vfp11_write_mask (destmask
, fn
);
5963 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
5966 /* Look for potentially-troublesome code sequences which might trigger the
5967 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
5968 (available from ARM) for details of the erratum. A short version is
5969 described in ld.texinfo. */
5972 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
5975 bfd_byte
*contents
= NULL
;
5977 int regs
[3], numregs
= 0;
5978 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5979 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
5981 if (globals
== NULL
)
5984 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
5985 The states transition as follows:
5987 0 -> 1 (vector) or 0 -> 2 (scalar)
5988 A VFP FMAC-pipeline instruction has been seen. Fill
5989 regs[0]..regs[numregs-1] with its input operands. Remember this
5990 instruction in 'first_fmac'.
5993 Any instruction, except for a VFP instruction which overwrites
5998 A VFP instruction has been seen which overwrites any of regs[*].
5999 We must make a veneer! Reset state to 0 before examining next
6003 If we fail to match anything in state 2, reset to state 0 and reset
6004 the instruction pointer to the instruction after 'first_fmac'.
6006 If the VFP11 vector mode is in use, there must be at least two unrelated
6007 instructions between anti-dependent VFP11 instructions to properly avoid
6008 triggering the erratum, hence the use of the extra state 1. */
6010 /* If we are only performing a partial link do not bother
6011 to construct any glue. */
6012 if (link_info
->relocatable
)
6015 /* Skip if this bfd does not correspond to an ELF image. */
6016 if (! is_arm_elf (abfd
))
6019 /* We should have chosen a fix type by the time we get here. */
6020 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
6022 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
6025 /* Skip this BFD if it corresponds to an executable or dynamic object. */
6026 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
6029 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6031 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
6032 struct _arm_elf_section_data
*sec_data
;
6034 /* If we don't have executable progbits, we're not interested in this
6035 section. Also skip if section is to be excluded. */
6036 if (elf_section_type (sec
) != SHT_PROGBITS
6037 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
6038 || (sec
->flags
& SEC_EXCLUDE
) != 0
6039 || sec
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
6040 || sec
->output_section
== bfd_abs_section_ptr
6041 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
6044 sec_data
= elf32_arm_section_data (sec
);
6046 if (sec_data
->mapcount
== 0)
6049 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6050 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6051 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6054 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
6055 elf32_arm_compare_mapping
);
6057 for (span
= 0; span
< sec_data
->mapcount
; span
++)
6059 unsigned int span_start
= sec_data
->map
[span
].vma
;
6060 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
6061 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
6062 char span_type
= sec_data
->map
[span
].type
;
6064 /* FIXME: Only ARM mode is supported at present. We may need to
6065 support Thumb-2 mode also at some point. */
6066 if (span_type
!= 'a')
6069 for (i
= span_start
; i
< span_end
;)
6071 unsigned int next_i
= i
+ 4;
6072 unsigned int insn
= bfd_big_endian (abfd
)
6073 ? (contents
[i
] << 24)
6074 | (contents
[i
+ 1] << 16)
6075 | (contents
[i
+ 2] << 8)
6077 : (contents
[i
+ 3] << 24)
6078 | (contents
[i
+ 2] << 16)
6079 | (contents
[i
+ 1] << 8)
6081 unsigned int writemask
= 0;
6082 enum bfd_arm_vfp11_pipe vpipe
;
6087 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
6089 /* I'm assuming the VFP11 erratum can trigger with denorm
6090 operands on either the FMAC or the DS pipeline. This might
6091 lead to slightly overenthusiastic veneer insertion. */
6092 if (vpipe
== VFP11_FMAC
|| vpipe
== VFP11_DS
)
6094 state
= use_vector
? 1 : 2;
6096 veneer_of_insn
= insn
;
6102 int other_regs
[3], other_numregs
;
6103 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6106 if (vpipe
!= VFP11_BAD
6107 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6117 int other_regs
[3], other_numregs
;
6118 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6121 if (vpipe
!= VFP11_BAD
6122 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6128 next_i
= first_fmac
+ 4;
6134 abort (); /* Should be unreachable. */
6139 elf32_vfp11_erratum_list
*newerr
=(elf32_vfp11_erratum_list
*)
6140 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
6143 errcount
= ++(elf32_arm_section_data (sec
)->erratumcount
);
6145 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
6150 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
6157 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
6162 newerr
->next
= sec_data
->erratumlist
;
6163 sec_data
->erratumlist
= newerr
;
6172 if (contents
!= NULL
6173 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6181 if (contents
!= NULL
6182 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6188 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
6189 after sections have been laid out, using specially-named symbols. */
6192 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
6193 struct bfd_link_info
*link_info
)
6196 struct elf32_arm_link_hash_table
*globals
;
6199 if (link_info
->relocatable
)
6202 /* Skip if this bfd does not correspond to an ELF image. */
6203 if (! is_arm_elf (abfd
))
6206 globals
= elf32_arm_hash_table (link_info
);
6207 if (globals
== NULL
)
6210 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
6211 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
6213 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6215 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
6216 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
6218 for (; errnode
!= NULL
; errnode
= errnode
->next
)
6220 struct elf_link_hash_entry
*myh
;
6223 switch (errnode
->type
)
6225 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
6226 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
6227 /* Find veneer symbol. */
6228 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
6229 errnode
->u
.b
.veneer
->u
.v
.id
);
6231 myh
= elf_link_hash_lookup
6232 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6235 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6236 "`%s'"), abfd
, tmp_name
);
6238 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6239 + myh
->root
.u
.def
.section
->output_offset
6240 + myh
->root
.u
.def
.value
;
6242 errnode
->u
.b
.veneer
->vma
= vma
;
6245 case VFP11_ERRATUM_ARM_VENEER
:
6246 case VFP11_ERRATUM_THUMB_VENEER
:
6247 /* Find return location. */
6248 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
6251 myh
= elf_link_hash_lookup
6252 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6255 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6256 "`%s'"), abfd
, tmp_name
);
6258 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6259 + myh
->root
.u
.def
.section
->output_offset
6260 + myh
->root
.u
.def
.value
;
6262 errnode
->u
.v
.branch
->vma
= vma
;
6275 /* Set target relocation values needed during linking. */
6278 bfd_elf32_arm_set_target_relocs (struct bfd
*output_bfd
,
6279 struct bfd_link_info
*link_info
,
6281 char * target2_type
,
6284 bfd_arm_vfp11_fix vfp11_fix
,
6285 int no_enum_warn
, int no_wchar_warn
,
6286 int pic_veneer
, int fix_cortex_a8
)
6288 struct elf32_arm_link_hash_table
*globals
;
6290 globals
= elf32_arm_hash_table (link_info
);
6291 if (globals
== NULL
)
6294 globals
->target1_is_rel
= target1_is_rel
;
6295 if (strcmp (target2_type
, "rel") == 0)
6296 globals
->target2_reloc
= R_ARM_REL32
;
6297 else if (strcmp (target2_type
, "abs") == 0)
6298 globals
->target2_reloc
= R_ARM_ABS32
;
6299 else if (strcmp (target2_type
, "got-rel") == 0)
6300 globals
->target2_reloc
= R_ARM_GOT_PREL
;
6303 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6306 globals
->fix_v4bx
= fix_v4bx
;
6307 globals
->use_blx
|= use_blx
;
6308 globals
->vfp11_fix
= vfp11_fix
;
6309 globals
->pic_veneer
= pic_veneer
;
6310 globals
->fix_cortex_a8
= fix_cortex_a8
;
6312 BFD_ASSERT (is_arm_elf (output_bfd
));
6313 elf_arm_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
6314 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
6317 /* Replace the target offset of a Thumb bl or b.w instruction. */
6320 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
6326 BFD_ASSERT ((offset
& 1) == 0);
6328 upper
= bfd_get_16 (abfd
, insn
);
6329 lower
= bfd_get_16 (abfd
, insn
+ 2);
6330 reloc_sign
= (offset
< 0) ? 1 : 0;
6331 upper
= (upper
& ~(bfd_vma
) 0x7ff)
6332 | ((offset
>> 12) & 0x3ff)
6333 | (reloc_sign
<< 10);
6334 lower
= (lower
& ~(bfd_vma
) 0x2fff)
6335 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
6336 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
6337 | ((offset
>> 1) & 0x7ff);
6338 bfd_put_16 (abfd
, upper
, insn
);
6339 bfd_put_16 (abfd
, lower
, insn
+ 2);
6342 /* Thumb code calling an ARM function. */
6345 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
6349 asection
* input_section
,
6350 bfd_byte
* hit_data
,
6353 bfd_signed_vma addend
,
6355 char **error_message
)
6359 long int ret_offset
;
6360 struct elf_link_hash_entry
* myh
;
6361 struct elf32_arm_link_hash_table
* globals
;
6363 myh
= find_thumb_glue (info
, name
, error_message
);
6367 globals
= elf32_arm_hash_table (info
);
6368 BFD_ASSERT (globals
!= NULL
);
6369 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6371 my_offset
= myh
->root
.u
.def
.value
;
6373 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6374 THUMB2ARM_GLUE_SECTION_NAME
);
6376 BFD_ASSERT (s
!= NULL
);
6377 BFD_ASSERT (s
->contents
!= NULL
);
6378 BFD_ASSERT (s
->output_section
!= NULL
);
6380 if ((my_offset
& 0x01) == 0x01)
6383 && sym_sec
->owner
!= NULL
6384 && !INTERWORK_FLAG (sym_sec
->owner
))
6386 (*_bfd_error_handler
)
6387 (_("%B(%s): warning: interworking not enabled.\n"
6388 " first occurrence: %B: thumb call to arm"),
6389 sym_sec
->owner
, input_bfd
, name
);
6395 myh
->root
.u
.def
.value
= my_offset
;
6397 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
6398 s
->contents
+ my_offset
);
6400 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
6401 s
->contents
+ my_offset
+ 2);
6404 /* Address of destination of the stub. */
6405 ((bfd_signed_vma
) val
)
6407 /* Offset from the start of the current section
6408 to the start of the stubs. */
6410 /* Offset of the start of this stub from the start of the stubs. */
6412 /* Address of the start of the current section. */
6413 + s
->output_section
->vma
)
6414 /* The branch instruction is 4 bytes into the stub. */
6416 /* ARM branches work from the pc of the instruction + 8. */
6419 put_arm_insn (globals
, output_bfd
,
6420 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
6421 s
->contents
+ my_offset
+ 4);
6424 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
6426 /* Now go back and fix up the original BL insn to point to here. */
6428 /* Address of where the stub is located. */
6429 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
6430 /* Address of where the BL is located. */
6431 - (input_section
->output_section
->vma
+ input_section
->output_offset
6433 /* Addend in the relocation. */
6435 /* Biassing for PC-relative addressing. */
6438 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
6443 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
6445 static struct elf_link_hash_entry
*
6446 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
6453 char ** error_message
)
6456 long int ret_offset
;
6457 struct elf_link_hash_entry
* myh
;
6458 struct elf32_arm_link_hash_table
* globals
;
6460 myh
= find_arm_glue (info
, name
, error_message
);
6464 globals
= elf32_arm_hash_table (info
);
6465 BFD_ASSERT (globals
!= NULL
);
6466 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6468 my_offset
= myh
->root
.u
.def
.value
;
6470 if ((my_offset
& 0x01) == 0x01)
6473 && sym_sec
->owner
!= NULL
6474 && !INTERWORK_FLAG (sym_sec
->owner
))
6476 (*_bfd_error_handler
)
6477 (_("%B(%s): warning: interworking not enabled.\n"
6478 " first occurrence: %B: arm call to thumb"),
6479 sym_sec
->owner
, input_bfd
, name
);
6483 myh
->root
.u
.def
.value
= my_offset
;
6485 if (info
->shared
|| globals
->root
.is_relocatable_executable
6486 || globals
->pic_veneer
)
6488 /* For relocatable objects we can't use absolute addresses,
6489 so construct the address from a relative offset. */
6490 /* TODO: If the offset is small it's probably worth
6491 constructing the address with adds. */
6492 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
6493 s
->contents
+ my_offset
);
6494 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
6495 s
->contents
+ my_offset
+ 4);
6496 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
6497 s
->contents
+ my_offset
+ 8);
6498 /* Adjust the offset by 4 for the position of the add,
6499 and 8 for the pipeline offset. */
6500 ret_offset
= (val
- (s
->output_offset
6501 + s
->output_section
->vma
6504 bfd_put_32 (output_bfd
, ret_offset
,
6505 s
->contents
+ my_offset
+ 12);
6507 else if (globals
->use_blx
)
6509 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
6510 s
->contents
+ my_offset
);
6512 /* It's a thumb address. Add the low order bit. */
6513 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
6514 s
->contents
+ my_offset
+ 4);
6518 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
6519 s
->contents
+ my_offset
);
6521 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
6522 s
->contents
+ my_offset
+ 4);
6524 /* It's a thumb address. Add the low order bit. */
6525 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
6526 s
->contents
+ my_offset
+ 8);
6532 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
6537 /* Arm code calling a Thumb function. */
6540 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
6544 asection
* input_section
,
6545 bfd_byte
* hit_data
,
6548 bfd_signed_vma addend
,
6550 char **error_message
)
6552 unsigned long int tmp
;
6555 long int ret_offset
;
6556 struct elf_link_hash_entry
* myh
;
6557 struct elf32_arm_link_hash_table
* globals
;
6559 globals
= elf32_arm_hash_table (info
);
6560 BFD_ASSERT (globals
!= NULL
);
6561 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6563 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6564 ARM2THUMB_GLUE_SECTION_NAME
);
6565 BFD_ASSERT (s
!= NULL
);
6566 BFD_ASSERT (s
->contents
!= NULL
);
6567 BFD_ASSERT (s
->output_section
!= NULL
);
6569 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
6570 sym_sec
, val
, s
, error_message
);
6574 my_offset
= myh
->root
.u
.def
.value
;
6575 tmp
= bfd_get_32 (input_bfd
, hit_data
);
6576 tmp
= tmp
& 0xFF000000;
6578 /* Somehow these are both 4 too far, so subtract 8. */
6579 ret_offset
= (s
->output_offset
6581 + s
->output_section
->vma
6582 - (input_section
->output_offset
6583 + input_section
->output_section
->vma
6587 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
6589 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
6594 /* Populate Arm stub for an exported Thumb function. */
6597 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
6599 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
6601 struct elf_link_hash_entry
* myh
;
6602 struct elf32_arm_link_hash_entry
*eh
;
6603 struct elf32_arm_link_hash_table
* globals
;
6606 char *error_message
;
6608 eh
= elf32_arm_hash_entry (h
);
6609 /* Allocate stubs for exported Thumb functions on v4t. */
6610 if (eh
->export_glue
== NULL
)
6613 globals
= elf32_arm_hash_table (info
);
6614 BFD_ASSERT (globals
!= NULL
);
6615 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6617 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6618 ARM2THUMB_GLUE_SECTION_NAME
);
6619 BFD_ASSERT (s
!= NULL
);
6620 BFD_ASSERT (s
->contents
!= NULL
);
6621 BFD_ASSERT (s
->output_section
!= NULL
);
6623 sec
= eh
->export_glue
->root
.u
.def
.section
;
6625 BFD_ASSERT (sec
->output_section
!= NULL
);
6627 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
6628 + sec
->output_section
->vma
;
6630 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
6631 h
->root
.u
.def
.section
->owner
,
6632 globals
->obfd
, sec
, val
, s
,
6638 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
6641 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
6646 struct elf32_arm_link_hash_table
*globals
;
6648 globals
= elf32_arm_hash_table (info
);
6649 BFD_ASSERT (globals
!= NULL
);
6650 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6652 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6653 ARM_BX_GLUE_SECTION_NAME
);
6654 BFD_ASSERT (s
!= NULL
);
6655 BFD_ASSERT (s
->contents
!= NULL
);
6656 BFD_ASSERT (s
->output_section
!= NULL
);
6658 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
6660 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
6662 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
6664 p
= s
->contents
+ glue_addr
;
6665 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
6666 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
6667 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
6668 globals
->bx_glue_offset
[reg
] |= 1;
6671 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
6674 /* Generate Arm stubs for exported Thumb symbols. */
6676 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
6677 struct bfd_link_info
*link_info
)
6679 struct elf32_arm_link_hash_table
* globals
;
6681 if (link_info
== NULL
)
6682 /* Ignore this if we are not called by the ELF backend linker. */
6685 globals
= elf32_arm_hash_table (link_info
);
6686 if (globals
== NULL
)
6689 /* If blx is available then exported Thumb symbols are OK and there is
6691 if (globals
->use_blx
)
6694 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
6698 /* Some relocations map to different relocations depending on the
6699 target. Return the real relocation. */
6702 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
6708 if (globals
->target1_is_rel
)
6714 return globals
->target2_reloc
;
6721 /* Return the base VMA address which should be subtracted from real addresses
6722 when resolving @dtpoff relocation.
6723 This is PT_TLS segment p_vaddr. */
6726 dtpoff_base (struct bfd_link_info
*info
)
6728 /* If tls_sec is NULL, we should have signalled an error already. */
6729 if (elf_hash_table (info
)->tls_sec
== NULL
)
6731 return elf_hash_table (info
)->tls_sec
->vma
;
6734 /* Return the relocation value for @tpoff relocation
6735 if STT_TLS virtual address is ADDRESS. */
6738 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
6740 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
6743 /* If tls_sec is NULL, we should have signalled an error already. */
6744 if (htab
->tls_sec
== NULL
)
6746 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
6747 return address
- htab
->tls_sec
->vma
+ base
;
6750 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
6751 VALUE is the relocation value. */
6753 static bfd_reloc_status_type
6754 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
6757 return bfd_reloc_overflow
;
6759 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
6760 bfd_put_32 (abfd
, value
, data
);
6761 return bfd_reloc_ok
;
6764 /* For a given value of n, calculate the value of G_n as required to
6765 deal with group relocations. We return it in the form of an
6766 encoded constant-and-rotation, together with the final residual. If n is
6767 specified as less than zero, then final_residual is filled with the
6768 input value and no further action is performed. */
6771 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
6775 bfd_vma encoded_g_n
= 0;
6776 bfd_vma residual
= value
; /* Also known as Y_n. */
6778 for (current_n
= 0; current_n
<= n
; current_n
++)
6782 /* Calculate which part of the value to mask. */
6789 /* Determine the most significant bit in the residual and
6790 align the resulting value to a 2-bit boundary. */
6791 for (msb
= 30; msb
>= 0; msb
-= 2)
6792 if (residual
& (3 << msb
))
6795 /* The desired shift is now (msb - 6), or zero, whichever
6802 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
6803 g_n
= residual
& (0xff << shift
);
6804 encoded_g_n
= (g_n
>> shift
)
6805 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
6807 /* Calculate the residual for the next time around. */
6811 *final_residual
= residual
;
6816 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
6817 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
6820 identify_add_or_sub (bfd_vma insn
)
6822 int opcode
= insn
& 0x1e00000;
6824 if (opcode
== 1 << 23) /* ADD */
6827 if (opcode
== 1 << 22) /* SUB */
6833 /* Perform a relocation as part of a final link. */
6835 static bfd_reloc_status_type
6836 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
6839 asection
* input_section
,
6840 bfd_byte
* contents
,
6841 Elf_Internal_Rela
* rel
,
6843 struct bfd_link_info
* info
,
6845 const char * sym_name
,
6847 struct elf_link_hash_entry
* h
,
6848 bfd_boolean
* unresolved_reloc_p
,
6849 char ** error_message
)
6851 unsigned long r_type
= howto
->type
;
6852 unsigned long r_symndx
;
6853 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
6854 bfd
* dynobj
= NULL
;
6855 Elf_Internal_Shdr
* symtab_hdr
;
6856 struct elf_link_hash_entry
** sym_hashes
;
6857 bfd_vma
* local_got_offsets
;
6858 asection
* sgot
= NULL
;
6859 asection
* splt
= NULL
;
6860 asection
* sreloc
= NULL
;
6862 bfd_signed_vma signed_addend
;
6863 struct elf32_arm_link_hash_table
* globals
;
6865 globals
= elf32_arm_hash_table (info
);
6866 if (globals
== NULL
)
6867 return bfd_reloc_notsupported
;
6869 BFD_ASSERT (is_arm_elf (input_bfd
));
6871 /* Some relocation types map to different relocations depending on the
6872 target. We pick the right one here. */
6873 r_type
= arm_real_reloc_type (globals
, r_type
);
6874 if (r_type
!= howto
->type
)
6875 howto
= elf32_arm_howto_from_type (r_type
);
6877 /* If the start address has been set, then set the EF_ARM_HASENTRY
6878 flag. Setting this more than once is redundant, but the cost is
6879 not too high, and it keeps the code simple.
6881 The test is done here, rather than somewhere else, because the
6882 start address is only set just before the final link commences.
6884 Note - if the user deliberately sets a start address of 0, the
6885 flag will not be set. */
6886 if (bfd_get_start_address (output_bfd
) != 0)
6887 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
6889 dynobj
= elf_hash_table (info
)->dynobj
;
6892 sgot
= bfd_get_section_by_name (dynobj
, ".got");
6893 splt
= bfd_get_section_by_name (dynobj
, ".plt");
6895 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
6896 sym_hashes
= elf_sym_hashes (input_bfd
);
6897 local_got_offsets
= elf_local_got_offsets (input_bfd
);
6898 r_symndx
= ELF32_R_SYM (rel
->r_info
);
6900 if (globals
->use_rel
)
6902 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
6904 if (addend
& ((howto
->src_mask
+ 1) >> 1))
6907 signed_addend
&= ~ howto
->src_mask
;
6908 signed_addend
|= addend
;
6911 signed_addend
= addend
;
6914 addend
= signed_addend
= rel
->r_addend
;
6919 /* We don't need to find a value for this symbol. It's just a
6921 *unresolved_reloc_p
= FALSE
;
6922 return bfd_reloc_ok
;
6925 if (!globals
->vxworks_p
)
6926 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
6930 case R_ARM_ABS32_NOI
:
6932 case R_ARM_REL32_NOI
:
6938 /* Handle relocations which should use the PLT entry. ABS32/REL32
6939 will use the symbol's value, which may point to a PLT entry, but we
6940 don't need to handle that here. If we created a PLT entry, all
6941 branches in this object should go to it, except if the PLT is too
6942 far away, in which case a long branch stub should be inserted. */
6943 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
6944 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
6945 && r_type
!= R_ARM_CALL
6946 && r_type
!= R_ARM_JUMP24
6947 && r_type
!= R_ARM_PLT32
)
6950 && h
->plt
.offset
!= (bfd_vma
) -1)
6952 /* If we've created a .plt section, and assigned a PLT entry to
6953 this function, it should not be known to bind locally. If
6954 it were, we would have cleared the PLT entry. */
6955 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info
, h
));
6957 value
= (splt
->output_section
->vma
6958 + splt
->output_offset
6960 *unresolved_reloc_p
= FALSE
;
6961 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
6962 contents
, rel
->r_offset
, value
,
6966 /* When generating a shared object or relocatable executable, these
6967 relocations are copied into the output file to be resolved at
6969 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
6970 && (input_section
->flags
& SEC_ALLOC
)
6971 && !(globals
->vxworks_p
6972 && strcmp (input_section
->output_section
->name
,
6974 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
6975 || !SYMBOL_CALLS_LOCAL (info
, h
))
6976 && (!strstr (input_section
->name
, STUB_SUFFIX
))
6978 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6979 || h
->root
.type
!= bfd_link_hash_undefweak
)
6980 && r_type
!= R_ARM_PC24
6981 && r_type
!= R_ARM_CALL
6982 && r_type
!= R_ARM_JUMP24
6983 && r_type
!= R_ARM_PREL31
6984 && r_type
!= R_ARM_PLT32
)
6986 Elf_Internal_Rela outrel
;
6988 bfd_boolean skip
, relocate
;
6990 *unresolved_reloc_p
= FALSE
;
6994 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
6995 ! globals
->use_rel
);
6998 return bfd_reloc_notsupported
;
7004 outrel
.r_addend
= addend
;
7006 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
7008 if (outrel
.r_offset
== (bfd_vma
) -1)
7010 else if (outrel
.r_offset
== (bfd_vma
) -2)
7011 skip
= TRUE
, relocate
= TRUE
;
7012 outrel
.r_offset
+= (input_section
->output_section
->vma
7013 + input_section
->output_offset
);
7016 memset (&outrel
, 0, sizeof outrel
);
7021 || !h
->def_regular
))
7022 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
7027 /* This symbol is local, or marked to become local. */
7028 if (sym_flags
== STT_ARM_TFUNC
)
7030 if (globals
->symbian_p
)
7034 /* On Symbian OS, the data segment and text segement
7035 can be relocated independently. Therefore, we
7036 must indicate the segment to which this
7037 relocation is relative. The BPABI allows us to
7038 use any symbol in the right segment; we just use
7039 the section symbol as it is convenient. (We
7040 cannot use the symbol given by "h" directly as it
7041 will not appear in the dynamic symbol table.)
7043 Note that the dynamic linker ignores the section
7044 symbol value, so we don't subtract osec->vma
7045 from the emitted reloc addend. */
7047 osec
= sym_sec
->output_section
;
7049 osec
= input_section
->output_section
;
7050 symbol
= elf_section_data (osec
)->dynindx
;
7053 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7055 if ((osec
->flags
& SEC_READONLY
) == 0
7056 && htab
->data_index_section
!= NULL
)
7057 osec
= htab
->data_index_section
;
7059 osec
= htab
->text_index_section
;
7060 symbol
= elf_section_data (osec
)->dynindx
;
7062 BFD_ASSERT (symbol
!= 0);
7065 /* On SVR4-ish systems, the dynamic loader cannot
7066 relocate the text and data segments independently,
7067 so the symbol does not matter. */
7069 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
7070 if (globals
->use_rel
)
7073 outrel
.r_addend
+= value
;
7076 loc
= sreloc
->contents
;
7077 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
7078 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7080 /* If this reloc is against an external symbol, we do not want to
7081 fiddle with the addend. Otherwise, we need to include the symbol
7082 value so that it becomes an addend for the dynamic reloc. */
7084 return bfd_reloc_ok
;
7086 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7087 contents
, rel
->r_offset
, value
,
7090 else switch (r_type
)
7093 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
7095 case R_ARM_XPC25
: /* Arm BLX instruction. */
7098 case R_ARM_PC24
: /* Arm B/BL instruction. */
7101 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
7103 if (r_type
== R_ARM_XPC25
)
7105 /* Check for Arm calling Arm function. */
7106 /* FIXME: Should we translate the instruction into a BL
7107 instruction instead ? */
7108 if (sym_flags
!= STT_ARM_TFUNC
)
7109 (*_bfd_error_handler
)
7110 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
7112 h
? h
->root
.root
.string
: "(local)");
7114 else if (r_type
== R_ARM_PC24
)
7116 /* Check for Arm calling Thumb function. */
7117 if (sym_flags
== STT_ARM_TFUNC
)
7119 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
7120 output_bfd
, input_section
,
7121 hit_data
, sym_sec
, rel
->r_offset
,
7122 signed_addend
, value
,
7124 return bfd_reloc_ok
;
7126 return bfd_reloc_dangerous
;
7130 /* Check if a stub has to be inserted because the
7131 destination is too far or we are changing mode. */
7132 if ( r_type
== R_ARM_CALL
7133 || r_type
== R_ARM_JUMP24
7134 || r_type
== R_ARM_PLT32
)
7136 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
7137 struct elf32_arm_link_hash_entry
*hash
;
7139 hash
= (struct elf32_arm_link_hash_entry
*) h
;
7140 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
7143 input_bfd
, sym_name
);
7145 if (stub_type
!= arm_stub_none
)
7147 /* The target is out of reach, so redirect the
7148 branch to the local stub for this function. */
7150 stub_entry
= elf32_arm_get_stub_entry (input_section
,
7154 if (stub_entry
!= NULL
)
7155 value
= (stub_entry
->stub_offset
7156 + stub_entry
->stub_sec
->output_offset
7157 + stub_entry
->stub_sec
->output_section
->vma
);
7161 /* If the call goes through a PLT entry, make sure to
7162 check distance to the right destination address. */
7165 && h
->plt
.offset
!= (bfd_vma
) -1)
7167 value
= (splt
->output_section
->vma
7168 + splt
->output_offset
7170 *unresolved_reloc_p
= FALSE
;
7171 /* The PLT entry is in ARM mode, regardless of the
7173 sym_flags
= STT_FUNC
;
7178 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
7180 S is the address of the symbol in the relocation.
7181 P is address of the instruction being relocated.
7182 A is the addend (extracted from the instruction) in bytes.
7184 S is held in 'value'.
7185 P is the base address of the section containing the
7186 instruction plus the offset of the reloc into that
7188 (input_section->output_section->vma +
7189 input_section->output_offset +
7191 A is the addend, converted into bytes, ie:
7194 Note: None of these operations have knowledge of the pipeline
7195 size of the processor, thus it is up to the assembler to
7196 encode this information into the addend. */
7197 value
-= (input_section
->output_section
->vma
7198 + input_section
->output_offset
);
7199 value
-= rel
->r_offset
;
7200 if (globals
->use_rel
)
7201 value
+= (signed_addend
<< howto
->size
);
7203 /* RELA addends do not have to be adjusted by howto->size. */
7204 value
+= signed_addend
;
7206 signed_addend
= value
;
7207 signed_addend
>>= howto
->rightshift
;
7209 /* A branch to an undefined weak symbol is turned into a jump to
7210 the next instruction unless a PLT entry will be created.
7211 Do the same for local undefined symbols.
7212 The jump to the next instruction is optimized as a NOP depending
7213 on the architecture. */
7214 if (h
? (h
->root
.type
== bfd_link_hash_undefweak
7215 && !(splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1))
7216 : bfd_is_und_section (sym_sec
))
7218 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000);
7220 if (arch_has_arm_nop (globals
))
7221 value
|= 0x0320f000;
7223 value
|= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
7227 /* Perform a signed range check. */
7228 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
7229 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
7230 return bfd_reloc_overflow
;
7232 addend
= (value
& 2);
7234 value
= (signed_addend
& howto
->dst_mask
)
7235 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
7237 if (r_type
== R_ARM_CALL
)
7239 /* Set the H bit in the BLX instruction. */
7240 if (sym_flags
== STT_ARM_TFUNC
)
7245 value
&= ~(bfd_vma
)(1 << 24);
7248 /* Select the correct instruction (BL or BLX). */
7249 /* Only if we are not handling a BL to a stub. In this
7250 case, mode switching is performed by the stub. */
7251 if (sym_flags
== STT_ARM_TFUNC
&& !stub_entry
)
7255 value
&= ~(bfd_vma
)(1 << 28);
7265 if (sym_flags
== STT_ARM_TFUNC
)
7269 case R_ARM_ABS32_NOI
:
7275 if (sym_flags
== STT_ARM_TFUNC
)
7277 value
-= (input_section
->output_section
->vma
7278 + input_section
->output_offset
+ rel
->r_offset
);
7281 case R_ARM_REL32_NOI
:
7283 value
-= (input_section
->output_section
->vma
7284 + input_section
->output_offset
+ rel
->r_offset
);
7288 value
-= (input_section
->output_section
->vma
7289 + input_section
->output_offset
+ rel
->r_offset
);
7290 value
+= signed_addend
;
7291 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
7293 /* Check for overflow. */
7294 if ((value
^ (value
>> 1)) & (1 << 30))
7295 return bfd_reloc_overflow
;
7297 value
&= 0x7fffffff;
7298 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
7299 if (sym_flags
== STT_ARM_TFUNC
)
7304 bfd_put_32 (input_bfd
, value
, hit_data
);
7305 return bfd_reloc_ok
;
7310 /* There is no way to tell whether the user intended to use a signed or
7311 unsigned addend. When checking for overflow we accept either,
7312 as specified by the AAELF. */
7313 if ((long) value
> 0xff || (long) value
< -0x80)
7314 return bfd_reloc_overflow
;
7316 bfd_put_8 (input_bfd
, value
, hit_data
);
7317 return bfd_reloc_ok
;
7322 /* See comment for R_ARM_ABS8. */
7323 if ((long) value
> 0xffff || (long) value
< -0x8000)
7324 return bfd_reloc_overflow
;
7326 bfd_put_16 (input_bfd
, value
, hit_data
);
7327 return bfd_reloc_ok
;
7329 case R_ARM_THM_ABS5
:
7330 /* Support ldr and str instructions for the thumb. */
7331 if (globals
->use_rel
)
7333 /* Need to refetch addend. */
7334 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
7335 /* ??? Need to determine shift amount from operand size. */
7336 addend
>>= howto
->rightshift
;
7340 /* ??? Isn't value unsigned? */
7341 if ((long) value
> 0x1f || (long) value
< -0x10)
7342 return bfd_reloc_overflow
;
7344 /* ??? Value needs to be properly shifted into place first. */
7345 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
7346 bfd_put_16 (input_bfd
, value
, hit_data
);
7347 return bfd_reloc_ok
;
7349 case R_ARM_THM_ALU_PREL_11_0
:
7350 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
7353 bfd_signed_vma relocation
;
7355 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
7356 | bfd_get_16 (input_bfd
, hit_data
+ 2);
7358 if (globals
->use_rel
)
7360 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
7361 | ((insn
& (1 << 26)) >> 15);
7362 if (insn
& 0xf00000)
7363 signed_addend
= -signed_addend
;
7366 relocation
= value
+ signed_addend
;
7367 relocation
-= (input_section
->output_section
->vma
7368 + input_section
->output_offset
7371 value
= abs (relocation
);
7373 if (value
>= 0x1000)
7374 return bfd_reloc_overflow
;
7376 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
7377 | ((value
& 0x700) << 4)
7378 | ((value
& 0x800) << 15);
7382 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
7383 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
7385 return bfd_reloc_ok
;
7389 /* PR 10073: This reloc is not generated by the GNU toolchain,
7390 but it is supported for compatibility with third party libraries
7391 generated by other compilers, specifically the ARM/IAR. */
7394 bfd_signed_vma relocation
;
7396 insn
= bfd_get_16 (input_bfd
, hit_data
);
7398 if (globals
->use_rel
)
7399 addend
= (insn
& 0x00ff) << 2;
7401 relocation
= value
+ addend
;
7402 relocation
-= (input_section
->output_section
->vma
7403 + input_section
->output_offset
7406 value
= abs (relocation
);
7408 /* We do not check for overflow of this reloc. Although strictly
7409 speaking this is incorrect, it appears to be necessary in order
7410 to work with IAR generated relocs. Since GCC and GAS do not
7411 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
7412 a problem for them. */
7415 insn
= (insn
& 0xff00) | (value
>> 2);
7417 bfd_put_16 (input_bfd
, insn
, hit_data
);
7419 return bfd_reloc_ok
;
7422 case R_ARM_THM_PC12
:
7423 /* Corresponds to: ldr.w reg, [pc, #offset]. */
7426 bfd_signed_vma relocation
;
7428 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
7429 | bfd_get_16 (input_bfd
, hit_data
+ 2);
7431 if (globals
->use_rel
)
7433 signed_addend
= insn
& 0xfff;
7434 if (!(insn
& (1 << 23)))
7435 signed_addend
= -signed_addend
;
7438 relocation
= value
+ signed_addend
;
7439 relocation
-= (input_section
->output_section
->vma
7440 + input_section
->output_offset
7443 value
= abs (relocation
);
7445 if (value
>= 0x1000)
7446 return bfd_reloc_overflow
;
7448 insn
= (insn
& 0xff7ff000) | value
;
7449 if (relocation
>= 0)
7452 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
7453 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
7455 return bfd_reloc_ok
;
7458 case R_ARM_THM_XPC22
:
7459 case R_ARM_THM_CALL
:
7460 case R_ARM_THM_JUMP24
:
7461 /* Thumb BL (branch long instruction). */
7465 bfd_boolean overflow
= FALSE
;
7466 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
7467 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
7468 bfd_signed_vma reloc_signed_max
;
7469 bfd_signed_vma reloc_signed_min
;
7471 bfd_signed_vma signed_check
;
7473 const int thumb2
= using_thumb2 (globals
);
7475 /* A branch to an undefined weak symbol is turned into a jump to
7476 the next instruction unless a PLT entry will be created.
7477 The jump to the next instruction is optimized as a NOP.W for
7478 Thumb-2 enabled architectures. */
7479 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
7480 && !(splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1))
7482 if (arch_has_thumb2_nop (globals
))
7484 bfd_put_16 (input_bfd
, 0xf3af, hit_data
);
7485 bfd_put_16 (input_bfd
, 0x8000, hit_data
+ 2);
7489 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
7490 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
7492 return bfd_reloc_ok
;
7495 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
7496 with Thumb-1) involving the J1 and J2 bits. */
7497 if (globals
->use_rel
)
7499 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
7500 bfd_vma upper
= upper_insn
& 0x3ff;
7501 bfd_vma lower
= lower_insn
& 0x7ff;
7502 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
7503 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
7504 bfd_vma i1
= j1
^ s
? 0 : 1;
7505 bfd_vma i2
= j2
^ s
? 0 : 1;
7507 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
7509 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
7511 signed_addend
= addend
;
7514 if (r_type
== R_ARM_THM_XPC22
)
7516 /* Check for Thumb to Thumb call. */
7517 /* FIXME: Should we translate the instruction into a BL
7518 instruction instead ? */
7519 if (sym_flags
== STT_ARM_TFUNC
)
7520 (*_bfd_error_handler
)
7521 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
7523 h
? h
->root
.root
.string
: "(local)");
7527 /* If it is not a call to Thumb, assume call to Arm.
7528 If it is a call relative to a section name, then it is not a
7529 function call at all, but rather a long jump. Calls through
7530 the PLT do not require stubs. */
7531 if (sym_flags
!= STT_ARM_TFUNC
&& sym_flags
!= STT_SECTION
7532 && (h
== NULL
|| splt
== NULL
7533 || h
->plt
.offset
== (bfd_vma
) -1))
7535 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
7537 /* Convert BL to BLX. */
7538 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7540 else if (( r_type
!= R_ARM_THM_CALL
)
7541 && (r_type
!= R_ARM_THM_JUMP24
))
7543 if (elf32_thumb_to_arm_stub
7544 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
7545 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
7547 return bfd_reloc_ok
;
7549 return bfd_reloc_dangerous
;
7552 else if (sym_flags
== STT_ARM_TFUNC
&& globals
->use_blx
7553 && r_type
== R_ARM_THM_CALL
)
7555 /* Make sure this is a BL. */
7556 lower_insn
|= 0x1800;
7560 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
7561 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
7563 /* Check if a stub has to be inserted because the destination
7565 struct elf32_arm_stub_hash_entry
*stub_entry
;
7566 struct elf32_arm_link_hash_entry
*hash
;
7568 hash
= (struct elf32_arm_link_hash_entry
*) h
;
7570 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
7571 &sym_flags
, hash
, value
, sym_sec
,
7572 input_bfd
, sym_name
);
7574 if (stub_type
!= arm_stub_none
)
7576 /* The target is out of reach or we are changing modes, so
7577 redirect the branch to the local stub for this
7579 stub_entry
= elf32_arm_get_stub_entry (input_section
,
7583 if (stub_entry
!= NULL
)
7584 value
= (stub_entry
->stub_offset
7585 + stub_entry
->stub_sec
->output_offset
7586 + stub_entry
->stub_sec
->output_section
->vma
);
7588 /* If this call becomes a call to Arm, force BLX. */
7589 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
7592 && !arm_stub_is_thumb (stub_entry
->stub_type
))
7593 || (sym_flags
!= STT_ARM_TFUNC
))
7594 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7599 /* Handle calls via the PLT. */
7600 if (stub_type
== arm_stub_none
7603 && h
->plt
.offset
!= (bfd_vma
) -1)
7605 value
= (splt
->output_section
->vma
7606 + splt
->output_offset
7609 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
7611 /* If the Thumb BLX instruction is available, convert
7612 the BL to a BLX instruction to call the ARM-mode
7614 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7615 sym_flags
= STT_FUNC
;
7619 /* Target the Thumb stub before the ARM PLT entry. */
7620 value
-= PLT_THUMB_STUB_SIZE
;
7621 sym_flags
= STT_ARM_TFUNC
;
7623 *unresolved_reloc_p
= FALSE
;
7626 relocation
= value
+ signed_addend
;
7628 relocation
-= (input_section
->output_section
->vma
7629 + input_section
->output_offset
7632 check
= relocation
>> howto
->rightshift
;
7634 /* If this is a signed value, the rightshift just dropped
7635 leading 1 bits (assuming twos complement). */
7636 if ((bfd_signed_vma
) relocation
>= 0)
7637 signed_check
= check
;
7639 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
7641 /* Calculate the permissable maximum and minimum values for
7642 this relocation according to whether we're relocating for
7644 bitsize
= howto
->bitsize
;
7647 reloc_signed_max
= (1 << (bitsize
- 1)) - 1;
7648 reloc_signed_min
= ~reloc_signed_max
;
7650 /* Assumes two's complement. */
7651 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7654 if ((lower_insn
& 0x5000) == 0x4000)
7655 /* For a BLX instruction, make sure that the relocation is rounded up
7656 to a word boundary. This follows the semantics of the instruction
7657 which specifies that bit 1 of the target address will come from bit
7658 1 of the base address. */
7659 relocation
= (relocation
+ 2) & ~ 3;
7661 /* Put RELOCATION back into the insn. Assumes two's complement.
7662 We use the Thumb-2 encoding, which is safe even if dealing with
7663 a Thumb-1 instruction by virtue of our overflow check above. */
7664 reloc_sign
= (signed_check
< 0) ? 1 : 0;
7665 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
7666 | ((relocation
>> 12) & 0x3ff)
7667 | (reloc_sign
<< 10);
7668 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
7669 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
7670 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
7671 | ((relocation
>> 1) & 0x7ff);
7673 /* Put the relocated value back in the object file: */
7674 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
7675 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
7677 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
7681 case R_ARM_THM_JUMP19
:
7682 /* Thumb32 conditional branch instruction. */
7685 bfd_boolean overflow
= FALSE
;
7686 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
7687 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
7688 bfd_signed_vma reloc_signed_max
= 0xffffe;
7689 bfd_signed_vma reloc_signed_min
= -0x100000;
7690 bfd_signed_vma signed_check
;
7692 /* Need to refetch the addend, reconstruct the top three bits,
7693 and squish the two 11 bit pieces together. */
7694 if (globals
->use_rel
)
7696 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
7697 bfd_vma upper
= (upper_insn
& 0x003f);
7698 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
7699 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
7700 bfd_vma lower
= (lower_insn
& 0x07ff);
7705 upper
-= 0x0100; /* Sign extend. */
7707 addend
= (upper
<< 12) | (lower
<< 1);
7708 signed_addend
= addend
;
7711 /* Handle calls via the PLT. */
7712 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
7714 value
= (splt
->output_section
->vma
7715 + splt
->output_offset
7717 /* Target the Thumb stub before the ARM PLT entry. */
7718 value
-= PLT_THUMB_STUB_SIZE
;
7719 *unresolved_reloc_p
= FALSE
;
7722 /* ??? Should handle interworking? GCC might someday try to
7723 use this for tail calls. */
7725 relocation
= value
+ signed_addend
;
7726 relocation
-= (input_section
->output_section
->vma
7727 + input_section
->output_offset
7729 signed_check
= (bfd_signed_vma
) relocation
;
7731 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7734 /* Put RELOCATION back into the insn. */
7736 bfd_vma S
= (relocation
& 0x00100000) >> 20;
7737 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
7738 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
7739 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
7740 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
7742 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
7743 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
7746 /* Put the relocated value back in the object file: */
7747 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
7748 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
7750 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
7753 case R_ARM_THM_JUMP11
:
7754 case R_ARM_THM_JUMP8
:
7755 case R_ARM_THM_JUMP6
:
7756 /* Thumb B (branch) instruction). */
7758 bfd_signed_vma relocation
;
7759 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
7760 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
7761 bfd_signed_vma signed_check
;
7763 /* CZB cannot jump backward. */
7764 if (r_type
== R_ARM_THM_JUMP6
)
7765 reloc_signed_min
= 0;
7767 if (globals
->use_rel
)
7769 /* Need to refetch addend. */
7770 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
7771 if (addend
& ((howto
->src_mask
+ 1) >> 1))
7774 signed_addend
&= ~ howto
->src_mask
;
7775 signed_addend
|= addend
;
7778 signed_addend
= addend
;
7779 /* The value in the insn has been right shifted. We need to
7780 undo this, so that we can perform the address calculation
7781 in terms of bytes. */
7782 signed_addend
<<= howto
->rightshift
;
7784 relocation
= value
+ signed_addend
;
7786 relocation
-= (input_section
->output_section
->vma
7787 + input_section
->output_offset
7790 relocation
>>= howto
->rightshift
;
7791 signed_check
= relocation
;
7793 if (r_type
== R_ARM_THM_JUMP6
)
7794 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
7796 relocation
&= howto
->dst_mask
;
7797 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
7799 bfd_put_16 (input_bfd
, relocation
, hit_data
);
7801 /* Assumes two's complement. */
7802 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7803 return bfd_reloc_overflow
;
7805 return bfd_reloc_ok
;
7808 case R_ARM_ALU_PCREL7_0
:
7809 case R_ARM_ALU_PCREL15_8
:
7810 case R_ARM_ALU_PCREL23_15
:
7815 insn
= bfd_get_32 (input_bfd
, hit_data
);
7816 if (globals
->use_rel
)
7818 /* Extract the addend. */
7819 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
7820 signed_addend
= addend
;
7822 relocation
= value
+ signed_addend
;
7824 relocation
-= (input_section
->output_section
->vma
7825 + input_section
->output_offset
7827 insn
= (insn
& ~0xfff)
7828 | ((howto
->bitpos
<< 7) & 0xf00)
7829 | ((relocation
>> howto
->bitpos
) & 0xff);
7830 bfd_put_32 (input_bfd
, value
, hit_data
);
7832 return bfd_reloc_ok
;
7834 case R_ARM_GNU_VTINHERIT
:
7835 case R_ARM_GNU_VTENTRY
:
7836 return bfd_reloc_ok
;
7838 case R_ARM_GOTOFF32
:
7839 /* Relocation is relative to the start of the
7840 global offset table. */
7842 BFD_ASSERT (sgot
!= NULL
);
7844 return bfd_reloc_notsupported
;
7846 /* If we are addressing a Thumb function, we need to adjust the
7847 address by one, so that attempts to call the function pointer will
7848 correctly interpret it as Thumb code. */
7849 if (sym_flags
== STT_ARM_TFUNC
)
7852 /* Note that sgot->output_offset is not involved in this
7853 calculation. We always want the start of .got. If we
7854 define _GLOBAL_OFFSET_TABLE in a different way, as is
7855 permitted by the ABI, we might have to change this
7857 value
-= sgot
->output_section
->vma
;
7858 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7859 contents
, rel
->r_offset
, value
,
7863 /* Use global offset table as symbol value. */
7864 BFD_ASSERT (sgot
!= NULL
);
7867 return bfd_reloc_notsupported
;
7869 *unresolved_reloc_p
= FALSE
;
7870 value
= sgot
->output_section
->vma
;
7871 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7872 contents
, rel
->r_offset
, value
,
7876 case R_ARM_GOT_PREL
:
7877 /* Relocation is to the entry for this symbol in the
7878 global offset table. */
7880 return bfd_reloc_notsupported
;
7887 off
= h
->got
.offset
;
7888 BFD_ASSERT (off
!= (bfd_vma
) -1);
7889 dyn
= globals
->root
.dynamic_sections_created
;
7891 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
7893 && SYMBOL_REFERENCES_LOCAL (info
, h
))
7894 || (ELF_ST_VISIBILITY (h
->other
)
7895 && h
->root
.type
== bfd_link_hash_undefweak
))
7897 /* This is actually a static link, or it is a -Bsymbolic link
7898 and the symbol is defined locally. We must initialize this
7899 entry in the global offset table. Since the offset must
7900 always be a multiple of 4, we use the least significant bit
7901 to record whether we have initialized it already.
7903 When doing a dynamic link, we create a .rel(a).got relocation
7904 entry to initialize the value. This is done in the
7905 finish_dynamic_symbol routine. */
7910 /* If we are addressing a Thumb function, we need to
7911 adjust the address by one, so that attempts to
7912 call the function pointer will correctly
7913 interpret it as Thumb code. */
7914 if (sym_flags
== STT_ARM_TFUNC
)
7917 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
7922 *unresolved_reloc_p
= FALSE
;
7924 value
= sgot
->output_offset
+ off
;
7930 BFD_ASSERT (local_got_offsets
!= NULL
&&
7931 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
7933 off
= local_got_offsets
[r_symndx
];
7935 /* The offset must always be a multiple of 4. We use the
7936 least significant bit to record whether we have already
7937 generated the necessary reloc. */
7942 /* If we are addressing a Thumb function, we need to
7943 adjust the address by one, so that attempts to
7944 call the function pointer will correctly
7945 interpret it as Thumb code. */
7946 if (sym_flags
== STT_ARM_TFUNC
)
7949 if (globals
->use_rel
)
7950 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
7955 Elf_Internal_Rela outrel
;
7958 srelgot
= (bfd_get_section_by_name
7959 (dynobj
, RELOC_SECTION (globals
, ".got")));
7960 BFD_ASSERT (srelgot
!= NULL
);
7962 outrel
.r_addend
= addend
+ value
;
7963 outrel
.r_offset
= (sgot
->output_section
->vma
7964 + sgot
->output_offset
7966 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
7967 loc
= srelgot
->contents
;
7968 loc
+= srelgot
->reloc_count
++ * RELOC_SIZE (globals
);
7969 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7972 local_got_offsets
[r_symndx
] |= 1;
7975 value
= sgot
->output_offset
+ off
;
7977 if (r_type
!= R_ARM_GOT32
)
7978 value
+= sgot
->output_section
->vma
;
7980 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7981 contents
, rel
->r_offset
, value
,
7984 case R_ARM_TLS_LDO32
:
7985 value
= value
- dtpoff_base (info
);
7987 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7988 contents
, rel
->r_offset
, value
,
7991 case R_ARM_TLS_LDM32
:
7995 if (globals
->sgot
== NULL
)
7998 off
= globals
->tls_ldm_got
.offset
;
8004 /* If we don't know the module number, create a relocation
8008 Elf_Internal_Rela outrel
;
8011 if (globals
->srelgot
== NULL
)
8014 outrel
.r_addend
= 0;
8015 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
8016 + globals
->sgot
->output_offset
+ off
);
8017 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
8019 if (globals
->use_rel
)
8020 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8021 globals
->sgot
->contents
+ off
);
8023 loc
= globals
->srelgot
->contents
;
8024 loc
+= globals
->srelgot
->reloc_count
++ * RELOC_SIZE (globals
);
8025 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8028 bfd_put_32 (output_bfd
, 1, globals
->sgot
->contents
+ off
);
8030 globals
->tls_ldm_got
.offset
|= 1;
8033 value
= globals
->sgot
->output_section
->vma
+ globals
->sgot
->output_offset
+ off
8034 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
8036 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8037 contents
, rel
->r_offset
, value
,
8041 case R_ARM_TLS_GD32
:
8042 case R_ARM_TLS_IE32
:
8048 if (globals
->sgot
== NULL
)
8055 dyn
= globals
->root
.dynamic_sections_created
;
8056 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
8058 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
8060 *unresolved_reloc_p
= FALSE
;
8063 off
= h
->got
.offset
;
8064 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
8068 if (local_got_offsets
== NULL
)
8070 off
= local_got_offsets
[r_symndx
];
8071 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
8074 if (tls_type
== GOT_UNKNOWN
)
8081 bfd_boolean need_relocs
= FALSE
;
8082 Elf_Internal_Rela outrel
;
8083 bfd_byte
*loc
= NULL
;
8086 /* The GOT entries have not been initialized yet. Do it
8087 now, and emit any relocations. If both an IE GOT and a
8088 GD GOT are necessary, we emit the GD first. */
8090 if ((info
->shared
|| indx
!= 0)
8092 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8093 || h
->root
.type
!= bfd_link_hash_undefweak
))
8096 if (globals
->srelgot
== NULL
)
8098 loc
= globals
->srelgot
->contents
;
8099 loc
+= globals
->srelgot
->reloc_count
* RELOC_SIZE (globals
);
8102 if (tls_type
& GOT_TLS_GD
)
8106 outrel
.r_addend
= 0;
8107 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
8108 + globals
->sgot
->output_offset
8110 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
8112 if (globals
->use_rel
)
8113 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8114 globals
->sgot
->contents
+ cur_off
);
8116 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8117 globals
->srelgot
->reloc_count
++;
8118 loc
+= RELOC_SIZE (globals
);
8121 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
8122 globals
->sgot
->contents
+ cur_off
+ 4);
8125 outrel
.r_addend
= 0;
8126 outrel
.r_info
= ELF32_R_INFO (indx
,
8127 R_ARM_TLS_DTPOFF32
);
8128 outrel
.r_offset
+= 4;
8130 if (globals
->use_rel
)
8131 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8132 globals
->sgot
->contents
+ cur_off
+ 4);
8135 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8136 globals
->srelgot
->reloc_count
++;
8137 loc
+= RELOC_SIZE (globals
);
8142 /* If we are not emitting relocations for a
8143 general dynamic reference, then we must be in a
8144 static link or an executable link with the
8145 symbol binding locally. Mark it as belonging
8146 to module 1, the executable. */
8147 bfd_put_32 (output_bfd
, 1,
8148 globals
->sgot
->contents
+ cur_off
);
8149 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
8150 globals
->sgot
->contents
+ cur_off
+ 4);
8156 if (tls_type
& GOT_TLS_IE
)
8161 outrel
.r_addend
= value
- dtpoff_base (info
);
8163 outrel
.r_addend
= 0;
8164 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
8165 + globals
->sgot
->output_offset
8167 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
8169 if (globals
->use_rel
)
8170 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8171 globals
->sgot
->contents
+ cur_off
);
8173 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8174 globals
->srelgot
->reloc_count
++;
8175 loc
+= RELOC_SIZE (globals
);
8178 bfd_put_32 (output_bfd
, tpoff (info
, value
),
8179 globals
->sgot
->contents
+ cur_off
);
8186 local_got_offsets
[r_symndx
] |= 1;
8189 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
8191 value
= globals
->sgot
->output_section
->vma
+ globals
->sgot
->output_offset
+ off
8192 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
8194 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8195 contents
, rel
->r_offset
, value
,
8199 case R_ARM_TLS_LE32
:
8202 (*_bfd_error_handler
)
8203 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
8204 input_bfd
, input_section
,
8205 (long) rel
->r_offset
, howto
->name
);
8206 return (bfd_reloc_status_type
) FALSE
;
8209 value
= tpoff (info
, value
);
8211 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8212 contents
, rel
->r_offset
, value
,
8216 if (globals
->fix_v4bx
)
8218 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8220 /* Ensure that we have a BX instruction. */
8221 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
8223 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
8225 /* Branch to veneer. */
8227 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
8228 glue_addr
-= input_section
->output_section
->vma
8229 + input_section
->output_offset
8230 + rel
->r_offset
+ 8;
8231 insn
= (insn
& 0xf0000000) | 0x0a000000
8232 | ((glue_addr
>> 2) & 0x00ffffff);
8236 /* Preserve Rm (lowest four bits) and the condition code
8237 (highest four bits). Other bits encode MOV PC,Rm. */
8238 insn
= (insn
& 0xf000000f) | 0x01a0f000;
8241 bfd_put_32 (input_bfd
, insn
, hit_data
);
8243 return bfd_reloc_ok
;
8245 case R_ARM_MOVW_ABS_NC
:
8246 case R_ARM_MOVT_ABS
:
8247 case R_ARM_MOVW_PREL_NC
:
8248 case R_ARM_MOVT_PREL
:
8249 /* Until we properly support segment-base-relative addressing then
8250 we assume the segment base to be zero, as for the group relocations.
8251 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
8252 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
8253 case R_ARM_MOVW_BREL_NC
:
8254 case R_ARM_MOVW_BREL
:
8255 case R_ARM_MOVT_BREL
:
8257 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8259 if (globals
->use_rel
)
8261 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
8262 signed_addend
= (addend
^ 0x8000) - 0x8000;
8265 value
+= signed_addend
;
8267 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
8268 value
-= (input_section
->output_section
->vma
8269 + input_section
->output_offset
+ rel
->r_offset
);
8271 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
8272 return bfd_reloc_overflow
;
8274 if (sym_flags
== STT_ARM_TFUNC
)
8277 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
8278 || r_type
== R_ARM_MOVT_BREL
)
8282 insn
|= value
& 0xfff;
8283 insn
|= (value
& 0xf000) << 4;
8284 bfd_put_32 (input_bfd
, insn
, hit_data
);
8286 return bfd_reloc_ok
;
8288 case R_ARM_THM_MOVW_ABS_NC
:
8289 case R_ARM_THM_MOVT_ABS
:
8290 case R_ARM_THM_MOVW_PREL_NC
:
8291 case R_ARM_THM_MOVT_PREL
:
8292 /* Until we properly support segment-base-relative addressing then
8293 we assume the segment base to be zero, as for the above relocations.
8294 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
8295 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
8296 as R_ARM_THM_MOVT_ABS. */
8297 case R_ARM_THM_MOVW_BREL_NC
:
8298 case R_ARM_THM_MOVW_BREL
:
8299 case R_ARM_THM_MOVT_BREL
:
8303 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
8304 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
8306 if (globals
->use_rel
)
8308 addend
= ((insn
>> 4) & 0xf000)
8309 | ((insn
>> 15) & 0x0800)
8310 | ((insn
>> 4) & 0x0700)
8312 signed_addend
= (addend
^ 0x8000) - 0x8000;
8315 value
+= signed_addend
;
8317 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
8318 value
-= (input_section
->output_section
->vma
8319 + input_section
->output_offset
+ rel
->r_offset
);
8321 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
8322 return bfd_reloc_overflow
;
8324 if (sym_flags
== STT_ARM_TFUNC
)
8327 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
8328 || r_type
== R_ARM_THM_MOVT_BREL
)
8332 insn
|= (value
& 0xf000) << 4;
8333 insn
|= (value
& 0x0800) << 15;
8334 insn
|= (value
& 0x0700) << 4;
8335 insn
|= (value
& 0x00ff);
8337 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8338 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8340 return bfd_reloc_ok
;
8342 case R_ARM_ALU_PC_G0_NC
:
8343 case R_ARM_ALU_PC_G1_NC
:
8344 case R_ARM_ALU_PC_G0
:
8345 case R_ARM_ALU_PC_G1
:
8346 case R_ARM_ALU_PC_G2
:
8347 case R_ARM_ALU_SB_G0_NC
:
8348 case R_ARM_ALU_SB_G1_NC
:
8349 case R_ARM_ALU_SB_G0
:
8350 case R_ARM_ALU_SB_G1
:
8351 case R_ARM_ALU_SB_G2
:
8353 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8354 bfd_vma pc
= input_section
->output_section
->vma
8355 + input_section
->output_offset
+ rel
->r_offset
;
8356 /* sb should be the origin of the *segment* containing the symbol.
8357 It is not clear how to obtain this OS-dependent value, so we
8358 make an arbitrary choice of zero. */
8362 bfd_signed_vma signed_value
;
8365 /* Determine which group of bits to select. */
8368 case R_ARM_ALU_PC_G0_NC
:
8369 case R_ARM_ALU_PC_G0
:
8370 case R_ARM_ALU_SB_G0_NC
:
8371 case R_ARM_ALU_SB_G0
:
8375 case R_ARM_ALU_PC_G1_NC
:
8376 case R_ARM_ALU_PC_G1
:
8377 case R_ARM_ALU_SB_G1_NC
:
8378 case R_ARM_ALU_SB_G1
:
8382 case R_ARM_ALU_PC_G2
:
8383 case R_ARM_ALU_SB_G2
:
8391 /* If REL, extract the addend from the insn. If RELA, it will
8392 have already been fetched for us. */
8393 if (globals
->use_rel
)
8396 bfd_vma constant
= insn
& 0xff;
8397 bfd_vma rotation
= (insn
& 0xf00) >> 8;
8400 signed_addend
= constant
;
8403 /* Compensate for the fact that in the instruction, the
8404 rotation is stored in multiples of 2 bits. */
8407 /* Rotate "constant" right by "rotation" bits. */
8408 signed_addend
= (constant
>> rotation
) |
8409 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
8412 /* Determine if the instruction is an ADD or a SUB.
8413 (For REL, this determines the sign of the addend.) */
8414 negative
= identify_add_or_sub (insn
);
8417 (*_bfd_error_handler
)
8418 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
8419 input_bfd
, input_section
,
8420 (long) rel
->r_offset
, howto
->name
);
8421 return bfd_reloc_overflow
;
8424 signed_addend
*= negative
;
8427 /* Compute the value (X) to go in the place. */
8428 if (r_type
== R_ARM_ALU_PC_G0_NC
8429 || r_type
== R_ARM_ALU_PC_G1_NC
8430 || r_type
== R_ARM_ALU_PC_G0
8431 || r_type
== R_ARM_ALU_PC_G1
8432 || r_type
== R_ARM_ALU_PC_G2
)
8434 signed_value
= value
- pc
+ signed_addend
;
8436 /* Section base relative. */
8437 signed_value
= value
- sb
+ signed_addend
;
8439 /* If the target symbol is a Thumb function, then set the
8440 Thumb bit in the address. */
8441 if (sym_flags
== STT_ARM_TFUNC
)
8444 /* Calculate the value of the relevant G_n, in encoded
8445 constant-with-rotation format. */
8446 g_n
= calculate_group_reloc_mask (abs (signed_value
), group
,
8449 /* Check for overflow if required. */
8450 if ((r_type
== R_ARM_ALU_PC_G0
8451 || r_type
== R_ARM_ALU_PC_G1
8452 || r_type
== R_ARM_ALU_PC_G2
8453 || r_type
== R_ARM_ALU_SB_G0
8454 || r_type
== R_ARM_ALU_SB_G1
8455 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
8457 (*_bfd_error_handler
)
8458 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8459 input_bfd
, input_section
,
8460 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8461 return bfd_reloc_overflow
;
8464 /* Mask out the value and the ADD/SUB part of the opcode; take care
8465 not to destroy the S bit. */
8468 /* Set the opcode according to whether the value to go in the
8469 place is negative. */
8470 if (signed_value
< 0)
8475 /* Encode the offset. */
8478 bfd_put_32 (input_bfd
, insn
, hit_data
);
8480 return bfd_reloc_ok
;
8482 case R_ARM_LDR_PC_G0
:
8483 case R_ARM_LDR_PC_G1
:
8484 case R_ARM_LDR_PC_G2
:
8485 case R_ARM_LDR_SB_G0
:
8486 case R_ARM_LDR_SB_G1
:
8487 case R_ARM_LDR_SB_G2
:
8489 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8490 bfd_vma pc
= input_section
->output_section
->vma
8491 + input_section
->output_offset
+ rel
->r_offset
;
8492 bfd_vma sb
= 0; /* See note above. */
8494 bfd_signed_vma signed_value
;
8497 /* Determine which groups of bits to calculate. */
8500 case R_ARM_LDR_PC_G0
:
8501 case R_ARM_LDR_SB_G0
:
8505 case R_ARM_LDR_PC_G1
:
8506 case R_ARM_LDR_SB_G1
:
8510 case R_ARM_LDR_PC_G2
:
8511 case R_ARM_LDR_SB_G2
:
8519 /* If REL, extract the addend from the insn. If RELA, it will
8520 have already been fetched for us. */
8521 if (globals
->use_rel
)
8523 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8524 signed_addend
= negative
* (insn
& 0xfff);
8527 /* Compute the value (X) to go in the place. */
8528 if (r_type
== R_ARM_LDR_PC_G0
8529 || r_type
== R_ARM_LDR_PC_G1
8530 || r_type
== R_ARM_LDR_PC_G2
)
8532 signed_value
= value
- pc
+ signed_addend
;
8534 /* Section base relative. */
8535 signed_value
= value
- sb
+ signed_addend
;
8537 /* Calculate the value of the relevant G_{n-1} to obtain
8538 the residual at that stage. */
8539 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8541 /* Check for overflow. */
8542 if (residual
>= 0x1000)
8544 (*_bfd_error_handler
)
8545 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8546 input_bfd
, input_section
,
8547 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8548 return bfd_reloc_overflow
;
8551 /* Mask out the value and U bit. */
8554 /* Set the U bit if the value to go in the place is non-negative. */
8555 if (signed_value
>= 0)
8558 /* Encode the offset. */
8561 bfd_put_32 (input_bfd
, insn
, hit_data
);
8563 return bfd_reloc_ok
;
8565 case R_ARM_LDRS_PC_G0
:
8566 case R_ARM_LDRS_PC_G1
:
8567 case R_ARM_LDRS_PC_G2
:
8568 case R_ARM_LDRS_SB_G0
:
8569 case R_ARM_LDRS_SB_G1
:
8570 case R_ARM_LDRS_SB_G2
:
8572 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8573 bfd_vma pc
= input_section
->output_section
->vma
8574 + input_section
->output_offset
+ rel
->r_offset
;
8575 bfd_vma sb
= 0; /* See note above. */
8577 bfd_signed_vma signed_value
;
8580 /* Determine which groups of bits to calculate. */
8583 case R_ARM_LDRS_PC_G0
:
8584 case R_ARM_LDRS_SB_G0
:
8588 case R_ARM_LDRS_PC_G1
:
8589 case R_ARM_LDRS_SB_G1
:
8593 case R_ARM_LDRS_PC_G2
:
8594 case R_ARM_LDRS_SB_G2
:
8602 /* If REL, extract the addend from the insn. If RELA, it will
8603 have already been fetched for us. */
8604 if (globals
->use_rel
)
8606 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8607 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
8610 /* Compute the value (X) to go in the place. */
8611 if (r_type
== R_ARM_LDRS_PC_G0
8612 || r_type
== R_ARM_LDRS_PC_G1
8613 || r_type
== R_ARM_LDRS_PC_G2
)
8615 signed_value
= value
- pc
+ signed_addend
;
8617 /* Section base relative. */
8618 signed_value
= value
- sb
+ signed_addend
;
8620 /* Calculate the value of the relevant G_{n-1} to obtain
8621 the residual at that stage. */
8622 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8624 /* Check for overflow. */
8625 if (residual
>= 0x100)
8627 (*_bfd_error_handler
)
8628 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8629 input_bfd
, input_section
,
8630 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8631 return bfd_reloc_overflow
;
8634 /* Mask out the value and U bit. */
8637 /* Set the U bit if the value to go in the place is non-negative. */
8638 if (signed_value
>= 0)
8641 /* Encode the offset. */
8642 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
8644 bfd_put_32 (input_bfd
, insn
, hit_data
);
8646 return bfd_reloc_ok
;
8648 case R_ARM_LDC_PC_G0
:
8649 case R_ARM_LDC_PC_G1
:
8650 case R_ARM_LDC_PC_G2
:
8651 case R_ARM_LDC_SB_G0
:
8652 case R_ARM_LDC_SB_G1
:
8653 case R_ARM_LDC_SB_G2
:
8655 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8656 bfd_vma pc
= input_section
->output_section
->vma
8657 + input_section
->output_offset
+ rel
->r_offset
;
8658 bfd_vma sb
= 0; /* See note above. */
8660 bfd_signed_vma signed_value
;
8663 /* Determine which groups of bits to calculate. */
8666 case R_ARM_LDC_PC_G0
:
8667 case R_ARM_LDC_SB_G0
:
8671 case R_ARM_LDC_PC_G1
:
8672 case R_ARM_LDC_SB_G1
:
8676 case R_ARM_LDC_PC_G2
:
8677 case R_ARM_LDC_SB_G2
:
8685 /* If REL, extract the addend from the insn. If RELA, it will
8686 have already been fetched for us. */
8687 if (globals
->use_rel
)
8689 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8690 signed_addend
= negative
* ((insn
& 0xff) << 2);
8693 /* Compute the value (X) to go in the place. */
8694 if (r_type
== R_ARM_LDC_PC_G0
8695 || r_type
== R_ARM_LDC_PC_G1
8696 || r_type
== R_ARM_LDC_PC_G2
)
8698 signed_value
= value
- pc
+ signed_addend
;
8700 /* Section base relative. */
8701 signed_value
= value
- sb
+ signed_addend
;
8703 /* Calculate the value of the relevant G_{n-1} to obtain
8704 the residual at that stage. */
8705 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8707 /* Check for overflow. (The absolute value to go in the place must be
8708 divisible by four and, after having been divided by four, must
8709 fit in eight bits.) */
8710 if ((residual
& 0x3) != 0 || residual
>= 0x400)
8712 (*_bfd_error_handler
)
8713 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8714 input_bfd
, input_section
,
8715 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8716 return bfd_reloc_overflow
;
8719 /* Mask out the value and U bit. */
8722 /* Set the U bit if the value to go in the place is non-negative. */
8723 if (signed_value
>= 0)
8726 /* Encode the offset. */
8727 insn
|= residual
>> 2;
8729 bfd_put_32 (input_bfd
, insn
, hit_data
);
8731 return bfd_reloc_ok
;
8734 return bfd_reloc_notsupported
;
8738 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
8740 arm_add_to_rel (bfd
* abfd
,
8742 reloc_howto_type
* howto
,
8743 bfd_signed_vma increment
)
8745 bfd_signed_vma addend
;
8747 if (howto
->type
== R_ARM_THM_CALL
8748 || howto
->type
== R_ARM_THM_JUMP24
)
8750 int upper_insn
, lower_insn
;
8753 upper_insn
= bfd_get_16 (abfd
, address
);
8754 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
8755 upper
= upper_insn
& 0x7ff;
8756 lower
= lower_insn
& 0x7ff;
8758 addend
= (upper
<< 12) | (lower
<< 1);
8759 addend
+= increment
;
8762 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
8763 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
8765 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
8766 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
8772 contents
= bfd_get_32 (abfd
, address
);
8774 /* Get the (signed) value from the instruction. */
8775 addend
= contents
& howto
->src_mask
;
8776 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8778 bfd_signed_vma mask
;
8781 mask
&= ~ howto
->src_mask
;
8785 /* Add in the increment, (which is a byte value). */
8786 switch (howto
->type
)
8789 addend
+= increment
;
8796 addend
<<= howto
->size
;
8797 addend
+= increment
;
8799 /* Should we check for overflow here ? */
8801 /* Drop any undesired bits. */
8802 addend
>>= howto
->rightshift
;
8806 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
8808 bfd_put_32 (abfd
, contents
, address
);
8812 #define IS_ARM_TLS_RELOC(R_TYPE) \
8813 ((R_TYPE) == R_ARM_TLS_GD32 \
8814 || (R_TYPE) == R_ARM_TLS_LDO32 \
8815 || (R_TYPE) == R_ARM_TLS_LDM32 \
8816 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
8817 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
8818 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
8819 || (R_TYPE) == R_ARM_TLS_LE32 \
8820 || (R_TYPE) == R_ARM_TLS_IE32)
8822 /* Relocate an ARM ELF section. */
8825 elf32_arm_relocate_section (bfd
* output_bfd
,
8826 struct bfd_link_info
* info
,
8828 asection
* input_section
,
8829 bfd_byte
* contents
,
8830 Elf_Internal_Rela
* relocs
,
8831 Elf_Internal_Sym
* local_syms
,
8832 asection
** local_sections
)
8834 Elf_Internal_Shdr
*symtab_hdr
;
8835 struct elf_link_hash_entry
**sym_hashes
;
8836 Elf_Internal_Rela
*rel
;
8837 Elf_Internal_Rela
*relend
;
8839 struct elf32_arm_link_hash_table
* globals
;
8841 globals
= elf32_arm_hash_table (info
);
8842 if (globals
== NULL
)
8845 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
8846 sym_hashes
= elf_sym_hashes (input_bfd
);
8849 relend
= relocs
+ input_section
->reloc_count
;
8850 for (; rel
< relend
; rel
++)
8853 reloc_howto_type
* howto
;
8854 unsigned long r_symndx
;
8855 Elf_Internal_Sym
* sym
;
8857 struct elf_link_hash_entry
* h
;
8859 bfd_reloc_status_type r
;
8862 bfd_boolean unresolved_reloc
= FALSE
;
8863 char *error_message
= NULL
;
8865 r_symndx
= ELF32_R_SYM (rel
->r_info
);
8866 r_type
= ELF32_R_TYPE (rel
->r_info
);
8867 r_type
= arm_real_reloc_type (globals
, r_type
);
8869 if ( r_type
== R_ARM_GNU_VTENTRY
8870 || r_type
== R_ARM_GNU_VTINHERIT
)
8873 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
8874 howto
= bfd_reloc
.howto
;
8880 if (r_symndx
< symtab_hdr
->sh_info
)
8882 sym
= local_syms
+ r_symndx
;
8883 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
8884 sec
= local_sections
[r_symndx
];
8886 /* An object file might have a reference to a local
8887 undefined symbol. This is a daft object file, but we
8888 should at least do something about it. V4BX & NONE
8889 relocations do not use the symbol and are explicitly
8890 allowed to use the undefined symbol, so allow those. */
8891 if (r_type
!= R_ARM_V4BX
8892 && r_type
!= R_ARM_NONE
8893 && bfd_is_und_section (sec
)
8894 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
8896 if (!info
->callbacks
->undefined_symbol
8897 (info
, bfd_elf_string_from_elf_section
8898 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
8899 input_bfd
, input_section
,
8900 rel
->r_offset
, TRUE
))
8904 if (globals
->use_rel
)
8906 relocation
= (sec
->output_section
->vma
8907 + sec
->output_offset
8909 if (!info
->relocatable
8910 && (sec
->flags
& SEC_MERGE
)
8911 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
8914 bfd_vma addend
, value
;
8918 case R_ARM_MOVW_ABS_NC
:
8919 case R_ARM_MOVT_ABS
:
8920 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
8921 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
8922 addend
= (addend
^ 0x8000) - 0x8000;
8925 case R_ARM_THM_MOVW_ABS_NC
:
8926 case R_ARM_THM_MOVT_ABS
:
8927 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
8929 value
|= bfd_get_16 (input_bfd
,
8930 contents
+ rel
->r_offset
+ 2);
8931 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
8932 | ((value
& 0x04000000) >> 15);
8933 addend
= (addend
^ 0x8000) - 0x8000;
8937 if (howto
->rightshift
8938 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
8940 (*_bfd_error_handler
)
8941 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
8942 input_bfd
, input_section
,
8943 (long) rel
->r_offset
, howto
->name
);
8947 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
8949 /* Get the (signed) value from the instruction. */
8950 addend
= value
& howto
->src_mask
;
8951 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8953 bfd_signed_vma mask
;
8956 mask
&= ~ howto
->src_mask
;
8964 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
8966 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
8968 /* Cases here must match those in the preceeding
8969 switch statement. */
8972 case R_ARM_MOVW_ABS_NC
:
8973 case R_ARM_MOVT_ABS
:
8974 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
8976 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
8979 case R_ARM_THM_MOVW_ABS_NC
:
8980 case R_ARM_THM_MOVT_ABS
:
8981 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
8982 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
8983 bfd_put_16 (input_bfd
, value
>> 16,
8984 contents
+ rel
->r_offset
);
8985 bfd_put_16 (input_bfd
, value
,
8986 contents
+ rel
->r_offset
+ 2);
8990 value
= (value
& ~ howto
->dst_mask
)
8991 | (addend
& howto
->dst_mask
);
8992 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
8998 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
9004 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
9005 r_symndx
, symtab_hdr
, sym_hashes
,
9007 unresolved_reloc
, warned
);
9012 if (sec
!= NULL
&& elf_discarded_section (sec
))
9014 /* For relocs against symbols from removed linkonce sections,
9015 or sections discarded by a linker script, we just want the
9016 section contents zeroed. Avoid any special processing. */
9017 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
9023 if (info
->relocatable
)
9025 /* This is a relocatable link. We don't have to change
9026 anything, unless the reloc is against a section symbol,
9027 in which case we have to adjust according to where the
9028 section symbol winds up in the output section. */
9029 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
9031 if (globals
->use_rel
)
9032 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
9033 howto
, (bfd_signed_vma
) sec
->output_offset
);
9035 rel
->r_addend
+= sec
->output_offset
;
9041 name
= h
->root
.root
.string
;
9044 name
= (bfd_elf_string_from_elf_section
9045 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
9046 if (name
== NULL
|| *name
== '\0')
9047 name
= bfd_section_name (input_bfd
, sec
);
9051 && r_type
!= R_ARM_NONE
9053 || h
->root
.type
== bfd_link_hash_defined
9054 || h
->root
.type
== bfd_link_hash_defweak
)
9055 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
9057 (*_bfd_error_handler
)
9058 ((sym_type
== STT_TLS
9059 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9060 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
9063 (long) rel
->r_offset
,
9068 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
9069 input_section
, contents
, rel
,
9070 relocation
, info
, sec
, name
,
9071 (h
? ELF_ST_TYPE (h
->type
) :
9072 ELF_ST_TYPE (sym
->st_info
)), h
,
9073 &unresolved_reloc
, &error_message
);
9075 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
9076 because such sections are not SEC_ALLOC and thus ld.so will
9077 not process them. */
9078 if (unresolved_reloc
9079 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
9082 (*_bfd_error_handler
)
9083 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
9086 (long) rel
->r_offset
,
9088 h
->root
.root
.string
);
9092 if (r
!= bfd_reloc_ok
)
9096 case bfd_reloc_overflow
:
9097 /* If the overflowing reloc was to an undefined symbol,
9098 we have already printed one error message and there
9099 is no point complaining again. */
9101 h
->root
.type
!= bfd_link_hash_undefined
)
9102 && (!((*info
->callbacks
->reloc_overflow
)
9103 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
9104 (bfd_vma
) 0, input_bfd
, input_section
,
9109 case bfd_reloc_undefined
:
9110 if (!((*info
->callbacks
->undefined_symbol
)
9111 (info
, name
, input_bfd
, input_section
,
9112 rel
->r_offset
, TRUE
)))
9116 case bfd_reloc_outofrange
:
9117 error_message
= _("out of range");
9120 case bfd_reloc_notsupported
:
9121 error_message
= _("unsupported relocation");
9124 case bfd_reloc_dangerous
:
9125 /* error_message should already be set. */
9129 error_message
= _("unknown error");
9133 BFD_ASSERT (error_message
!= NULL
);
9134 if (!((*info
->callbacks
->reloc_dangerous
)
9135 (info
, error_message
, input_bfd
, input_section
,
9146 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
9147 adds the edit to the start of the list. (The list must be built in order of
9148 ascending TINDEX: the function's callers are primarily responsible for
9149 maintaining that condition). */
9152 add_unwind_table_edit (arm_unwind_table_edit
**head
,
9153 arm_unwind_table_edit
**tail
,
9154 arm_unwind_edit_type type
,
9155 asection
*linked_section
,
9156 unsigned int tindex
)
9158 arm_unwind_table_edit
*new_edit
= (arm_unwind_table_edit
*)
9159 xmalloc (sizeof (arm_unwind_table_edit
));
9161 new_edit
->type
= type
;
9162 new_edit
->linked_section
= linked_section
;
9163 new_edit
->index
= tindex
;
9167 new_edit
->next
= NULL
;
9170 (*tail
)->next
= new_edit
;
9179 new_edit
->next
= *head
;
9188 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
9190 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
9192 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
9196 if (!exidx_sec
->rawsize
)
9197 exidx_sec
->rawsize
= exidx_sec
->size
;
9199 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
9200 out_sec
= exidx_sec
->output_section
;
9201 /* Adjust size of output section. */
9202 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
9205 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
9207 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
9209 struct _arm_elf_section_data
*exidx_arm_data
;
9211 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
9212 add_unwind_table_edit (
9213 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
9214 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
9215 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
9217 adjust_exidx_size(exidx_sec
, 8);
9220 /* Scan .ARM.exidx tables, and create a list describing edits which should be
9221 made to those tables, such that:
9223 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
9224 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
9225 codes which have been inlined into the index).
9227 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
9229 The edits are applied when the tables are written
9230 (in elf32_arm_write_section).
9234 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
9235 unsigned int num_text_sections
,
9236 struct bfd_link_info
*info
,
9237 bfd_boolean merge_exidx_entries
)
9240 unsigned int last_second_word
= 0, i
;
9241 asection
*last_exidx_sec
= NULL
;
9242 asection
*last_text_sec
= NULL
;
9243 int last_unwind_type
= -1;
9245 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
9247 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link_next
)
9251 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
9253 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
9254 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
9256 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
9259 if (elf_sec
->linked_to
)
9261 Elf_Internal_Shdr
*linked_hdr
9262 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
9263 struct _arm_elf_section_data
*linked_sec_arm_data
9264 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
9266 if (linked_sec_arm_data
== NULL
)
9269 /* Link this .ARM.exidx section back from the text section it
9271 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
9276 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
9277 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
9278 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
9280 for (i
= 0; i
< num_text_sections
; i
++)
9282 asection
*sec
= text_section_order
[i
];
9283 asection
*exidx_sec
;
9284 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
9285 struct _arm_elf_section_data
*exidx_arm_data
;
9286 bfd_byte
*contents
= NULL
;
9287 int deleted_exidx_bytes
= 0;
9289 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
9290 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
9291 Elf_Internal_Shdr
*hdr
;
9294 if (arm_data
== NULL
)
9297 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
9298 if (exidx_sec
== NULL
)
9300 /* Section has no unwind data. */
9301 if (last_unwind_type
== 0 || !last_exidx_sec
)
9304 /* Ignore zero sized sections. */
9308 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
9309 last_unwind_type
= 0;
9313 /* Skip /DISCARD/ sections. */
9314 if (bfd_is_abs_section (exidx_sec
->output_section
))
9317 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
9318 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
9321 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
9322 if (exidx_arm_data
== NULL
)
9325 ibfd
= exidx_sec
->owner
;
9327 if (hdr
->contents
!= NULL
)
9328 contents
= hdr
->contents
;
9329 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
9333 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
9335 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
9339 /* An EXIDX_CANTUNWIND entry. */
9340 if (second_word
== 1)
9342 if (last_unwind_type
== 0)
9346 /* Inlined unwinding data. Merge if equal to previous. */
9347 else if ((second_word
& 0x80000000) != 0)
9349 if (merge_exidx_entries
9350 && last_second_word
== second_word
&& last_unwind_type
== 1)
9353 last_second_word
= second_word
;
9355 /* Normal table entry. In theory we could merge these too,
9356 but duplicate entries are likely to be much less common. */
9362 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
9363 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
9365 deleted_exidx_bytes
+= 8;
9368 last_unwind_type
= unwind_type
;
9371 /* Free contents if we allocated it ourselves. */
9372 if (contents
!= hdr
->contents
)
9375 /* Record edits to be applied later (in elf32_arm_write_section). */
9376 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
9377 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
9379 if (deleted_exidx_bytes
> 0)
9380 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
9382 last_exidx_sec
= exidx_sec
;
9383 last_text_sec
= sec
;
9386 /* Add terminating CANTUNWIND entry. */
9387 if (last_exidx_sec
&& last_unwind_type
!= 0)
9388 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
9394 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
9395 bfd
*ibfd
, const char *name
)
9397 asection
*sec
, *osec
;
9399 sec
= bfd_get_section_by_name (ibfd
, name
);
9400 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
9403 osec
= sec
->output_section
;
9404 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
9407 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
9408 sec
->output_offset
, sec
->size
))
9415 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
9417 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
9418 asection
*sec
, *osec
;
9420 if (globals
== NULL
)
9423 /* Invoke the regular ELF backend linker to do all the work. */
9424 if (!bfd_elf_final_link (abfd
, info
))
9427 /* Process stub sections (eg BE8 encoding, ...). */
9428 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
9430 for(i
=0; i
<htab
->top_id
; i
++) {
9431 sec
= htab
->stub_group
[i
].stub_sec
;
9433 osec
= sec
->output_section
;
9434 elf32_arm_write_section (abfd
, info
, sec
, sec
->contents
);
9435 if (! bfd_set_section_contents (abfd
, osec
, sec
->contents
,
9436 sec
->output_offset
, sec
->size
))
9441 /* Write out any glue sections now that we have created all the
9443 if (globals
->bfd_of_glue_owner
!= NULL
)
9445 if (! elf32_arm_output_glue_section (info
, abfd
,
9446 globals
->bfd_of_glue_owner
,
9447 ARM2THUMB_GLUE_SECTION_NAME
))
9450 if (! elf32_arm_output_glue_section (info
, abfd
,
9451 globals
->bfd_of_glue_owner
,
9452 THUMB2ARM_GLUE_SECTION_NAME
))
9455 if (! elf32_arm_output_glue_section (info
, abfd
,
9456 globals
->bfd_of_glue_owner
,
9457 VFP11_ERRATUM_VENEER_SECTION_NAME
))
9460 if (! elf32_arm_output_glue_section (info
, abfd
,
9461 globals
->bfd_of_glue_owner
,
9462 ARM_BX_GLUE_SECTION_NAME
))
9469 /* Set the right machine number. */
9472 elf32_arm_object_p (bfd
*abfd
)
9476 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
9478 if (mach
!= bfd_mach_arm_unknown
)
9479 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
9481 else if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
9482 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, bfd_mach_arm_ep9312
);
9485 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
9490 /* Function to keep ARM specific flags in the ELF header. */
9493 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
9495 if (elf_flags_init (abfd
)
9496 && elf_elfheader (abfd
)->e_flags
!= flags
)
9498 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
9500 if (flags
& EF_ARM_INTERWORK
)
9501 (*_bfd_error_handler
)
9502 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
9506 (_("Warning: Clearing the interworking flag of %B due to outside request"),
9512 elf_elfheader (abfd
)->e_flags
= flags
;
9513 elf_flags_init (abfd
) = TRUE
;
9519 /* Copy backend specific data from one object module to another. */
9522 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
9527 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
9530 in_flags
= elf_elfheader (ibfd
)->e_flags
;
9531 out_flags
= elf_elfheader (obfd
)->e_flags
;
9533 if (elf_flags_init (obfd
)
9534 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
9535 && in_flags
!= out_flags
)
9537 /* Cannot mix APCS26 and APCS32 code. */
9538 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
9541 /* Cannot mix float APCS and non-float APCS code. */
9542 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
9545 /* If the src and dest have different interworking flags
9546 then turn off the interworking bit. */
9547 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
9549 if (out_flags
& EF_ARM_INTERWORK
)
9551 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
9554 in_flags
&= ~EF_ARM_INTERWORK
;
9557 /* Likewise for PIC, though don't warn for this case. */
9558 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
9559 in_flags
&= ~EF_ARM_PIC
;
9562 elf_elfheader (obfd
)->e_flags
= in_flags
;
9563 elf_flags_init (obfd
) = TRUE
;
9565 /* Also copy the EI_OSABI field. */
9566 elf_elfheader (obfd
)->e_ident
[EI_OSABI
] =
9567 elf_elfheader (ibfd
)->e_ident
[EI_OSABI
];
9569 /* Copy object attributes. */
9570 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
9575 /* Values for Tag_ABI_PCS_R9_use. */
9584 /* Values for Tag_ABI_PCS_RW_data. */
9587 AEABI_PCS_RW_data_absolute
,
9588 AEABI_PCS_RW_data_PCrel
,
9589 AEABI_PCS_RW_data_SBrel
,
9590 AEABI_PCS_RW_data_unused
9593 /* Values for Tag_ABI_enum_size. */
9599 AEABI_enum_forced_wide
9602 /* Determine whether an object attribute tag takes an integer, a
9606 elf32_arm_obj_attrs_arg_type (int tag
)
9608 if (tag
== Tag_compatibility
)
9609 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
9610 else if (tag
== Tag_nodefaults
)
9611 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
9612 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
9613 return ATTR_TYPE_FLAG_STR_VAL
;
9615 return ATTR_TYPE_FLAG_INT_VAL
;
9617 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
9620 /* The ABI defines that Tag_conformance should be emitted first, and that
9621 Tag_nodefaults should be second (if either is defined). This sets those
9622 two positions, and bumps up the position of all the remaining tags to
9625 elf32_arm_obj_attrs_order (int num
)
9628 return Tag_conformance
;
9630 return Tag_nodefaults
;
9631 if ((num
- 2) < Tag_nodefaults
)
9633 if ((num
- 1) < Tag_conformance
)
9638 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
9639 Returns -1 if no architecture could be read. */
9642 get_secondary_compatible_arch (bfd
*abfd
)
9644 obj_attribute
*attr
=
9645 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
9647 /* Note: the tag and its argument below are uleb128 values, though
9648 currently-defined values fit in one byte for each. */
9650 && attr
->s
[0] == Tag_CPU_arch
9651 && (attr
->s
[1] & 128) != 128
9655 /* This tag is "safely ignorable", so don't complain if it looks funny. */
9659 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
9660 The tag is removed if ARCH is -1. */
9663 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
9665 obj_attribute
*attr
=
9666 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
9674 /* Note: the tag and its argument below are uleb128 values, though
9675 currently-defined values fit in one byte for each. */
9677 attr
->s
= (char *) bfd_alloc (abfd
, 3);
9678 attr
->s
[0] = Tag_CPU_arch
;
9683 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
9687 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
9688 int newtag
, int secondary_compat
)
9690 #define T(X) TAG_CPU_ARCH_##X
9691 int tagl
, tagh
, result
;
9694 T(V6T2
), /* PRE_V4. */
9698 T(V6T2
), /* V5TE. */
9699 T(V6T2
), /* V5TEJ. */
9706 T(V6K
), /* PRE_V4. */
9711 T(V6K
), /* V5TEJ. */
9713 T(V6KZ
), /* V6KZ. */
9719 T(V7
), /* PRE_V4. */
9738 T(V6K
), /* V5TEJ. */
9740 T(V6KZ
), /* V6KZ. */
9753 T(V6K
), /* V5TEJ. */
9755 T(V6KZ
), /* V6KZ. */
9759 T(V6S_M
), /* V6_M. */
9760 T(V6S_M
) /* V6S_M. */
9766 T(V7E_M
), /* V4T. */
9767 T(V7E_M
), /* V5T. */
9768 T(V7E_M
), /* V5TE. */
9769 T(V7E_M
), /* V5TEJ. */
9771 T(V7E_M
), /* V6KZ. */
9772 T(V7E_M
), /* V6T2. */
9773 T(V7E_M
), /* V6K. */
9775 T(V7E_M
), /* V6_M. */
9776 T(V7E_M
), /* V6S_M. */
9777 T(V7E_M
) /* V7E_M. */
9779 const int v4t_plus_v6_m
[] =
9785 T(V5TE
), /* V5TE. */
9786 T(V5TEJ
), /* V5TEJ. */
9788 T(V6KZ
), /* V6KZ. */
9789 T(V6T2
), /* V6T2. */
9792 T(V6_M
), /* V6_M. */
9793 T(V6S_M
), /* V6S_M. */
9794 T(V7E_M
), /* V7E_M. */
9795 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
9805 /* Pseudo-architecture. */
9809 /* Check we've not got a higher architecture than we know about. */
9811 if (oldtag
> MAX_TAG_CPU_ARCH
|| newtag
> MAX_TAG_CPU_ARCH
)
9813 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
9817 /* Override old tag if we have a Tag_also_compatible_with on the output. */
9819 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
9820 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
9821 oldtag
= T(V4T_PLUS_V6_M
);
9823 /* And override the new tag if we have a Tag_also_compatible_with on the
9826 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
9827 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
9828 newtag
= T(V4T_PLUS_V6_M
);
9830 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
9831 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
9833 /* Architectures before V6KZ add features monotonically. */
9834 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
9837 result
= comb
[tagh
- T(V6T2
)][tagl
];
9839 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
9840 as the canonical version. */
9841 if (result
== T(V4T_PLUS_V6_M
))
9844 *secondary_compat_out
= T(V6_M
);
9847 *secondary_compat_out
= -1;
9851 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
9852 ibfd
, oldtag
, newtag
);
9860 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
9861 are conflicting attributes. */
9864 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, bfd
*obfd
)
9866 obj_attribute
*in_attr
;
9867 obj_attribute
*out_attr
;
9868 obj_attribute_list
*in_list
;
9869 obj_attribute_list
*out_list
;
9870 obj_attribute_list
**out_listp
;
9871 /* Some tags have 0 = don't care, 1 = strong requirement,
9872 2 = weak requirement. */
9873 static const int order_021
[3] = {0, 2, 1};
9875 bfd_boolean result
= TRUE
;
9877 /* Skip the linker stubs file. This preserves previous behavior
9878 of accepting unknown attributes in the first input file - but
9880 if (ibfd
->flags
& BFD_LINKER_CREATED
)
9883 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
9885 /* This is the first object. Copy the attributes. */
9886 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
9888 out_attr
= elf_known_obj_attributes_proc (obfd
);
9890 /* Use the Tag_null value to indicate the attributes have been
9894 /* We do not output objects with Tag_MPextension_use_legacy - we move
9895 the attribute's value to Tag_MPextension_use. */
9896 if (out_attr
[Tag_MPextension_use_legacy
].i
!= 0)
9898 if (out_attr
[Tag_MPextension_use
].i
!= 0
9899 && out_attr
[Tag_MPextension_use_legacy
].i
9900 != out_attr
[Tag_MPextension_use
].i
)
9903 (_("Error: %B has both the current and legacy "
9904 "Tag_MPextension_use attributes"), ibfd
);
9908 out_attr
[Tag_MPextension_use
] =
9909 out_attr
[Tag_MPextension_use_legacy
];
9910 out_attr
[Tag_MPextension_use_legacy
].type
= 0;
9911 out_attr
[Tag_MPextension_use_legacy
].i
= 0;
9917 in_attr
= elf_known_obj_attributes_proc (ibfd
);
9918 out_attr
= elf_known_obj_attributes_proc (obfd
);
9919 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
9920 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
9922 /* Ignore mismatches if the object doesn't use floating point. */
9923 if (out_attr
[Tag_ABI_FP_number_model
].i
== 0)
9924 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
9925 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= 0)
9928 (_("error: %B uses VFP register arguments, %B does not"),
9929 in_attr
[Tag_ABI_VFP_args
].i
? ibfd
: obfd
,
9930 in_attr
[Tag_ABI_VFP_args
].i
? obfd
: ibfd
);
9935 for (i
= 4; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
9937 /* Merge this attribute with existing attributes. */
9940 case Tag_CPU_raw_name
:
9942 /* These are merged after Tag_CPU_arch. */
9945 case Tag_ABI_optimization_goals
:
9946 case Tag_ABI_FP_optimization_goals
:
9947 /* Use the first value seen. */
9952 int secondary_compat
= -1, secondary_compat_out
= -1;
9953 unsigned int saved_out_attr
= out_attr
[i
].i
;
9954 static const char *name_table
[] = {
9955 /* These aren't real CPU names, but we can't guess
9956 that from the architecture version alone. */
9972 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
9973 secondary_compat
= get_secondary_compatible_arch (ibfd
);
9974 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
9975 out_attr
[i
].i
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
9976 &secondary_compat_out
,
9979 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
9981 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
9982 if (out_attr
[i
].i
== saved_out_attr
)
9983 ; /* Leave the names alone. */
9984 else if (out_attr
[i
].i
== in_attr
[i
].i
)
9986 /* The output architecture has been changed to match the
9987 input architecture. Use the input names. */
9988 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
9989 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
9991 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
9992 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
9997 out_attr
[Tag_CPU_name
].s
= NULL
;
9998 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
10001 /* If we still don't have a value for Tag_CPU_name,
10002 make one up now. Tag_CPU_raw_name remains blank. */
10003 if (out_attr
[Tag_CPU_name
].s
== NULL
10004 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
10005 out_attr
[Tag_CPU_name
].s
=
10006 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
10010 case Tag_ARM_ISA_use
:
10011 case Tag_THUMB_ISA_use
:
10012 case Tag_WMMX_arch
:
10013 case Tag_Advanced_SIMD_arch
:
10014 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
10015 case Tag_ABI_FP_rounding
:
10016 case Tag_ABI_FP_exceptions
:
10017 case Tag_ABI_FP_user_exceptions
:
10018 case Tag_ABI_FP_number_model
:
10019 case Tag_FP_HP_extension
:
10020 case Tag_CPU_unaligned_access
:
10022 case Tag_MPextension_use
:
10023 /* Use the largest value specified. */
10024 if (in_attr
[i
].i
> out_attr
[i
].i
)
10025 out_attr
[i
].i
= in_attr
[i
].i
;
10028 case Tag_ABI_align_preserved
:
10029 case Tag_ABI_PCS_RO_data
:
10030 /* Use the smallest value specified. */
10031 if (in_attr
[i
].i
< out_attr
[i
].i
)
10032 out_attr
[i
].i
= in_attr
[i
].i
;
10035 case Tag_ABI_align_needed
:
10036 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
10037 && (in_attr
[Tag_ABI_align_preserved
].i
== 0
10038 || out_attr
[Tag_ABI_align_preserved
].i
== 0))
10040 /* This error message should be enabled once all non-conformant
10041 binaries in the toolchain have had the attributes set
10044 (_("error: %B: 8-byte data alignment conflicts with %B"),
10048 /* Fall through. */
10049 case Tag_ABI_FP_denormal
:
10050 case Tag_ABI_PCS_GOT_use
:
10051 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
10052 value if greater than 2 (for future-proofing). */
10053 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
10054 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
10055 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
10056 out_attr
[i
].i
= in_attr
[i
].i
;
10059 case Tag_Virtualization_use
:
10060 /* The virtualization tag effectively stores two bits of
10061 information: the intended use of TrustZone (in bit 0), and the
10062 intended use of Virtualization (in bit 1). */
10063 if (out_attr
[i
].i
== 0)
10064 out_attr
[i
].i
= in_attr
[i
].i
;
10065 else if (in_attr
[i
].i
!= 0
10066 && in_attr
[i
].i
!= out_attr
[i
].i
)
10068 if (in_attr
[i
].i
<= 3 && out_attr
[i
].i
<= 3)
10073 (_("error: %B: unable to merge virtualization attributes "
10081 case Tag_CPU_arch_profile
:
10082 if (out_attr
[i
].i
!= in_attr
[i
].i
)
10084 /* 0 will merge with anything.
10085 'A' and 'S' merge to 'A'.
10086 'R' and 'S' merge to 'R'.
10087 'M' and 'A|R|S' is an error. */
10088 if (out_attr
[i
].i
== 0
10089 || (out_attr
[i
].i
== 'S'
10090 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
10091 out_attr
[i
].i
= in_attr
[i
].i
;
10092 else if (in_attr
[i
].i
== 0
10093 || (in_attr
[i
].i
== 'S'
10094 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
10095 ; /* Do nothing. */
10099 (_("error: %B: Conflicting architecture profiles %c/%c"),
10101 in_attr
[i
].i
? in_attr
[i
].i
: '0',
10102 out_attr
[i
].i
? out_attr
[i
].i
: '0');
10109 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
10110 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
10111 when it's 0. It might mean absence of FP hardware if
10112 Tag_FP_arch is zero, otherwise it is effectively SP + DP. */
10114 static const struct
10118 } vfp_versions
[7] =
10132 /* If the output has no requirement about FP hardware,
10133 follow the requirement of the input. */
10134 if (out_attr
[i
].i
== 0)
10136 BFD_ASSERT (out_attr
[Tag_ABI_HardFP_use
].i
== 0);
10137 out_attr
[i
].i
= in_attr
[i
].i
;
10138 out_attr
[Tag_ABI_HardFP_use
].i
10139 = in_attr
[Tag_ABI_HardFP_use
].i
;
10142 /* If the input has no requirement about FP hardware, do
10144 else if (in_attr
[i
].i
== 0)
10146 BFD_ASSERT (in_attr
[Tag_ABI_HardFP_use
].i
== 0);
10150 /* Both the input and the output have nonzero Tag_FP_arch.
10151 So Tag_ABI_HardFP_use is (SP & DP) when it's zero. */
10153 /* If both the input and the output have zero Tag_ABI_HardFP_use,
10155 if (in_attr
[Tag_ABI_HardFP_use
].i
== 0
10156 && out_attr
[Tag_ABI_HardFP_use
].i
== 0)
10158 /* If the input and the output have different Tag_ABI_HardFP_use,
10159 the combination of them is 3 (SP & DP). */
10160 else if (in_attr
[Tag_ABI_HardFP_use
].i
10161 != out_attr
[Tag_ABI_HardFP_use
].i
)
10162 out_attr
[Tag_ABI_HardFP_use
].i
= 3;
10164 /* Now we can handle Tag_FP_arch. */
10166 /* Values greater than 6 aren't defined, so just pick the
10168 if (in_attr
[i
].i
> 6 && in_attr
[i
].i
> out_attr
[i
].i
)
10170 out_attr
[i
] = in_attr
[i
];
10173 /* The output uses the superset of input features
10174 (ISA version) and registers. */
10175 ver
= vfp_versions
[in_attr
[i
].i
].ver
;
10176 if (ver
< vfp_versions
[out_attr
[i
].i
].ver
)
10177 ver
= vfp_versions
[out_attr
[i
].i
].ver
;
10178 regs
= vfp_versions
[in_attr
[i
].i
].regs
;
10179 if (regs
< vfp_versions
[out_attr
[i
].i
].regs
)
10180 regs
= vfp_versions
[out_attr
[i
].i
].regs
;
10181 /* This assumes all possible supersets are also a valid
10183 for (newval
= 6; newval
> 0; newval
--)
10185 if (regs
== vfp_versions
[newval
].regs
10186 && ver
== vfp_versions
[newval
].ver
)
10189 out_attr
[i
].i
= newval
;
10192 case Tag_PCS_config
:
10193 if (out_attr
[i
].i
== 0)
10194 out_attr
[i
].i
= in_attr
[i
].i
;
10195 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
10197 /* It's sometimes ok to mix different configs, so this is only
10200 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
10203 case Tag_ABI_PCS_R9_use
:
10204 if (in_attr
[i
].i
!= out_attr
[i
].i
10205 && out_attr
[i
].i
!= AEABI_R9_unused
10206 && in_attr
[i
].i
!= AEABI_R9_unused
)
10209 (_("error: %B: Conflicting use of R9"), ibfd
);
10212 if (out_attr
[i
].i
== AEABI_R9_unused
)
10213 out_attr
[i
].i
= in_attr
[i
].i
;
10215 case Tag_ABI_PCS_RW_data
:
10216 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
10217 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
10218 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
10221 (_("error: %B: SB relative addressing conflicts with use of R9"),
10225 /* Use the smallest value specified. */
10226 if (in_attr
[i
].i
< out_attr
[i
].i
)
10227 out_attr
[i
].i
= in_attr
[i
].i
;
10229 case Tag_ABI_PCS_wchar_t
:
10230 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
10231 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
10234 (_("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"),
10235 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
10237 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
10238 out_attr
[i
].i
= in_attr
[i
].i
;
10240 case Tag_ABI_enum_size
:
10241 if (in_attr
[i
].i
!= AEABI_enum_unused
)
10243 if (out_attr
[i
].i
== AEABI_enum_unused
10244 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
10246 /* The existing object is compatible with anything.
10247 Use whatever requirements the new object has. */
10248 out_attr
[i
].i
= in_attr
[i
].i
;
10250 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
10251 && out_attr
[i
].i
!= in_attr
[i
].i
10252 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
10254 static const char *aeabi_enum_names
[] =
10255 { "", "variable-size", "32-bit", "" };
10256 const char *in_name
=
10257 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
10258 ? aeabi_enum_names
[in_attr
[i
].i
]
10260 const char *out_name
=
10261 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
10262 ? aeabi_enum_names
[out_attr
[i
].i
]
10265 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
10266 ibfd
, in_name
, out_name
);
10270 case Tag_ABI_VFP_args
:
10273 case Tag_ABI_WMMX_args
:
10274 if (in_attr
[i
].i
!= out_attr
[i
].i
)
10277 (_("error: %B uses iWMMXt register arguments, %B does not"),
10282 case Tag_compatibility
:
10283 /* Merged in target-independent code. */
10285 case Tag_ABI_HardFP_use
:
10286 /* This is handled along with Tag_FP_arch. */
10288 case Tag_ABI_FP_16bit_format
:
10289 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
10291 if (in_attr
[i
].i
!= out_attr
[i
].i
)
10294 (_("error: fp16 format mismatch between %B and %B"),
10299 if (in_attr
[i
].i
!= 0)
10300 out_attr
[i
].i
= in_attr
[i
].i
;
10304 /* This tag is set to zero if we can use UDIV and SDIV in Thumb
10305 mode on a v7-M or v7-R CPU; to one if we can not use UDIV or
10306 SDIV at all; and to two if we can use UDIV or SDIV on a v7-A
10307 CPU. We will merge as follows: If the input attribute's value
10308 is one then the output attribute's value remains unchanged. If
10309 the input attribute's value is zero or two then if the output
10310 attribute's value is one the output value is set to the input
10311 value, otherwise the output value must be the same as the
10313 if (in_attr
[i
].i
!= 1 && out_attr
[i
].i
!= 1)
10315 if (in_attr
[i
].i
!= out_attr
[i
].i
)
10318 (_("DIV usage mismatch between %B and %B"),
10324 if (in_attr
[i
].i
!= 1)
10325 out_attr
[i
].i
= in_attr
[i
].i
;
10329 case Tag_MPextension_use_legacy
:
10330 /* We don't output objects with Tag_MPextension_use_legacy - we
10331 move the value to Tag_MPextension_use. */
10332 if (in_attr
[i
].i
!= 0 && in_attr
[Tag_MPextension_use
].i
!= 0)
10334 if (in_attr
[Tag_MPextension_use
].i
!= in_attr
[i
].i
)
10337 (_("%B has has both the current and legacy "
10338 "Tag_MPextension_use attributes"),
10344 if (in_attr
[i
].i
> out_attr
[Tag_MPextension_use
].i
)
10345 out_attr
[Tag_MPextension_use
] = in_attr
[i
];
10349 case Tag_nodefaults
:
10350 /* This tag is set if it exists, but the value is unused (and is
10351 typically zero). We don't actually need to do anything here -
10352 the merge happens automatically when the type flags are merged
10355 case Tag_also_compatible_with
:
10356 /* Already done in Tag_CPU_arch. */
10358 case Tag_conformance
:
10359 /* Keep the attribute if it matches. Throw it away otherwise.
10360 No attribute means no claim to conform. */
10361 if (!in_attr
[i
].s
|| !out_attr
[i
].s
10362 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
10363 out_attr
[i
].s
= NULL
;
10368 bfd
*err_bfd
= NULL
;
10370 /* The "known_obj_attributes" table does contain some undefined
10371 attributes. Ensure that there are unused. */
10372 if (out_attr
[i
].i
!= 0 || out_attr
[i
].s
!= NULL
)
10374 else if (in_attr
[i
].i
!= 0 || in_attr
[i
].s
!= NULL
)
10377 if (err_bfd
!= NULL
)
10379 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
10380 if ((i
& 127) < 64)
10383 (_("%B: Unknown mandatory EABI object attribute %d"),
10385 bfd_set_error (bfd_error_bad_value
);
10391 (_("Warning: %B: Unknown EABI object attribute %d"),
10396 /* Only pass on attributes that match in both inputs. */
10397 if (in_attr
[i
].i
!= out_attr
[i
].i
10398 || in_attr
[i
].s
!= out_attr
[i
].s
10399 || (in_attr
[i
].s
!= NULL
&& out_attr
[i
].s
!= NULL
10400 && strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0))
10403 out_attr
[i
].s
= NULL
;
10408 /* If out_attr was copied from in_attr then it won't have a type yet. */
10409 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
10410 out_attr
[i
].type
= in_attr
[i
].type
;
10413 /* Merge Tag_compatibility attributes and any common GNU ones. */
10414 if (!_bfd_elf_merge_object_attributes (ibfd
, obfd
))
10417 /* Check for any attributes not known on ARM. */
10418 in_list
= elf_other_obj_attributes_proc (ibfd
);
10419 out_listp
= &elf_other_obj_attributes_proc (obfd
);
10420 out_list
= *out_listp
;
10422 for (; in_list
|| out_list
; )
10424 bfd
*err_bfd
= NULL
;
10427 /* The tags for each list are in numerical order. */
10428 /* If the tags are equal, then merge. */
10429 if (out_list
&& (!in_list
|| in_list
->tag
> out_list
->tag
))
10431 /* This attribute only exists in obfd. We can't merge, and we don't
10432 know what the tag means, so delete it. */
10434 err_tag
= out_list
->tag
;
10435 *out_listp
= out_list
->next
;
10436 out_list
= *out_listp
;
10438 else if (in_list
&& (!out_list
|| in_list
->tag
< out_list
->tag
))
10440 /* This attribute only exists in ibfd. We can't merge, and we don't
10441 know what the tag means, so ignore it. */
10443 err_tag
= in_list
->tag
;
10444 in_list
= in_list
->next
;
10446 else /* The tags are equal. */
10448 /* As present, all attributes in the list are unknown, and
10449 therefore can't be merged meaningfully. */
10451 err_tag
= out_list
->tag
;
10453 /* Only pass on attributes that match in both inputs. */
10454 if (in_list
->attr
.i
!= out_list
->attr
.i
10455 || in_list
->attr
.s
!= out_list
->attr
.s
10456 || (in_list
->attr
.s
&& out_list
->attr
.s
10457 && strcmp (in_list
->attr
.s
, out_list
->attr
.s
) != 0))
10459 /* No match. Delete the attribute. */
10460 *out_listp
= out_list
->next
;
10461 out_list
= *out_listp
;
10465 /* Matched. Keep the attribute and move to the next. */
10466 out_list
= out_list
->next
;
10467 in_list
= in_list
->next
;
10473 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
10474 if ((err_tag
& 127) < 64)
10477 (_("%B: Unknown mandatory EABI object attribute %d"),
10479 bfd_set_error (bfd_error_bad_value
);
10485 (_("Warning: %B: Unknown EABI object attribute %d"),
10494 /* Return TRUE if the two EABI versions are incompatible. */
10497 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
10499 /* v4 and v5 are the same spec before and after it was released,
10500 so allow mixing them. */
10501 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
10502 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
10505 return (iver
== over
);
10508 /* Merge backend specific data from an object file to the output
10509 object file when linking. */
10512 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
);
10514 /* Display the flags field. */
10517 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
10519 FILE * file
= (FILE *) ptr
;
10520 unsigned long flags
;
10522 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
10524 /* Print normal ELF private data. */
10525 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
10527 flags
= elf_elfheader (abfd
)->e_flags
;
10528 /* Ignore init flag - it may not be set, despite the flags field
10529 containing valid data. */
10531 /* xgettext:c-format */
10532 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
10534 switch (EF_ARM_EABI_VERSION (flags
))
10536 case EF_ARM_EABI_UNKNOWN
:
10537 /* The following flag bits are GNU extensions and not part of the
10538 official ARM ELF extended ABI. Hence they are only decoded if
10539 the EABI version is not set. */
10540 if (flags
& EF_ARM_INTERWORK
)
10541 fprintf (file
, _(" [interworking enabled]"));
10543 if (flags
& EF_ARM_APCS_26
)
10544 fprintf (file
, " [APCS-26]");
10546 fprintf (file
, " [APCS-32]");
10548 if (flags
& EF_ARM_VFP_FLOAT
)
10549 fprintf (file
, _(" [VFP float format]"));
10550 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
10551 fprintf (file
, _(" [Maverick float format]"));
10553 fprintf (file
, _(" [FPA float format]"));
10555 if (flags
& EF_ARM_APCS_FLOAT
)
10556 fprintf (file
, _(" [floats passed in float registers]"));
10558 if (flags
& EF_ARM_PIC
)
10559 fprintf (file
, _(" [position independent]"));
10561 if (flags
& EF_ARM_NEW_ABI
)
10562 fprintf (file
, _(" [new ABI]"));
10564 if (flags
& EF_ARM_OLD_ABI
)
10565 fprintf (file
, _(" [old ABI]"));
10567 if (flags
& EF_ARM_SOFT_FLOAT
)
10568 fprintf (file
, _(" [software FP]"));
10570 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
10571 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
10572 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
10573 | EF_ARM_MAVERICK_FLOAT
);
10576 case EF_ARM_EABI_VER1
:
10577 fprintf (file
, _(" [Version1 EABI]"));
10579 if (flags
& EF_ARM_SYMSARESORTED
)
10580 fprintf (file
, _(" [sorted symbol table]"));
10582 fprintf (file
, _(" [unsorted symbol table]"));
10584 flags
&= ~ EF_ARM_SYMSARESORTED
;
10587 case EF_ARM_EABI_VER2
:
10588 fprintf (file
, _(" [Version2 EABI]"));
10590 if (flags
& EF_ARM_SYMSARESORTED
)
10591 fprintf (file
, _(" [sorted symbol table]"));
10593 fprintf (file
, _(" [unsorted symbol table]"));
10595 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
10596 fprintf (file
, _(" [dynamic symbols use segment index]"));
10598 if (flags
& EF_ARM_MAPSYMSFIRST
)
10599 fprintf (file
, _(" [mapping symbols precede others]"));
10601 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
10602 | EF_ARM_MAPSYMSFIRST
);
10605 case EF_ARM_EABI_VER3
:
10606 fprintf (file
, _(" [Version3 EABI]"));
10609 case EF_ARM_EABI_VER4
:
10610 fprintf (file
, _(" [Version4 EABI]"));
10613 case EF_ARM_EABI_VER5
:
10614 fprintf (file
, _(" [Version5 EABI]"));
10616 if (flags
& EF_ARM_BE8
)
10617 fprintf (file
, _(" [BE8]"));
10619 if (flags
& EF_ARM_LE8
)
10620 fprintf (file
, _(" [LE8]"));
10622 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
10626 fprintf (file
, _(" <EABI version unrecognised>"));
10630 flags
&= ~ EF_ARM_EABIMASK
;
10632 if (flags
& EF_ARM_RELEXEC
)
10633 fprintf (file
, _(" [relocatable executable]"));
10635 if (flags
& EF_ARM_HASENTRY
)
10636 fprintf (file
, _(" [has entry point]"));
10638 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
10641 fprintf (file
, _("<Unrecognised flag bits set>"));
10643 fputc ('\n', file
);
10649 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
10651 switch (ELF_ST_TYPE (elf_sym
->st_info
))
10653 case STT_ARM_TFUNC
:
10654 return ELF_ST_TYPE (elf_sym
->st_info
);
10656 case STT_ARM_16BIT
:
10657 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
10658 This allows us to distinguish between data used by Thumb instructions
10659 and non-data (which is probably code) inside Thumb regions of an
10661 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
10662 return ELF_ST_TYPE (elf_sym
->st_info
);
10673 elf32_arm_gc_mark_hook (asection
*sec
,
10674 struct bfd_link_info
*info
,
10675 Elf_Internal_Rela
*rel
,
10676 struct elf_link_hash_entry
*h
,
10677 Elf_Internal_Sym
*sym
)
10680 switch (ELF32_R_TYPE (rel
->r_info
))
10682 case R_ARM_GNU_VTINHERIT
:
10683 case R_ARM_GNU_VTENTRY
:
10687 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
10690 /* Update the got entry reference counts for the section being removed. */
10693 elf32_arm_gc_sweep_hook (bfd
* abfd
,
10694 struct bfd_link_info
* info
,
10696 const Elf_Internal_Rela
* relocs
)
10698 Elf_Internal_Shdr
*symtab_hdr
;
10699 struct elf_link_hash_entry
**sym_hashes
;
10700 bfd_signed_vma
*local_got_refcounts
;
10701 const Elf_Internal_Rela
*rel
, *relend
;
10702 struct elf32_arm_link_hash_table
* globals
;
10704 if (info
->relocatable
)
10707 globals
= elf32_arm_hash_table (info
);
10708 if (globals
== NULL
)
10711 elf_section_data (sec
)->local_dynrel
= NULL
;
10713 symtab_hdr
= & elf_symtab_hdr (abfd
);
10714 sym_hashes
= elf_sym_hashes (abfd
);
10715 local_got_refcounts
= elf_local_got_refcounts (abfd
);
10717 check_use_blx (globals
);
10719 relend
= relocs
+ sec
->reloc_count
;
10720 for (rel
= relocs
; rel
< relend
; rel
++)
10722 unsigned long r_symndx
;
10723 struct elf_link_hash_entry
*h
= NULL
;
10726 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10727 if (r_symndx
>= symtab_hdr
->sh_info
)
10729 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
10730 while (h
->root
.type
== bfd_link_hash_indirect
10731 || h
->root
.type
== bfd_link_hash_warning
)
10732 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10735 r_type
= ELF32_R_TYPE (rel
->r_info
);
10736 r_type
= arm_real_reloc_type (globals
, r_type
);
10740 case R_ARM_GOT_PREL
:
10741 case R_ARM_TLS_GD32
:
10742 case R_ARM_TLS_IE32
:
10745 if (h
->got
.refcount
> 0)
10746 h
->got
.refcount
-= 1;
10748 else if (local_got_refcounts
!= NULL
)
10750 if (local_got_refcounts
[r_symndx
] > 0)
10751 local_got_refcounts
[r_symndx
] -= 1;
10755 case R_ARM_TLS_LDM32
:
10756 globals
->tls_ldm_got
.refcount
-= 1;
10760 case R_ARM_ABS32_NOI
:
10762 case R_ARM_REL32_NOI
:
10768 case R_ARM_THM_CALL
:
10769 case R_ARM_THM_JUMP24
:
10770 case R_ARM_THM_JUMP19
:
10771 case R_ARM_MOVW_ABS_NC
:
10772 case R_ARM_MOVT_ABS
:
10773 case R_ARM_MOVW_PREL_NC
:
10774 case R_ARM_MOVT_PREL
:
10775 case R_ARM_THM_MOVW_ABS_NC
:
10776 case R_ARM_THM_MOVT_ABS
:
10777 case R_ARM_THM_MOVW_PREL_NC
:
10778 case R_ARM_THM_MOVT_PREL
:
10779 /* Should the interworking branches be here also? */
10783 struct elf32_arm_link_hash_entry
*eh
;
10784 struct elf32_arm_relocs_copied
**pp
;
10785 struct elf32_arm_relocs_copied
*p
;
10787 eh
= (struct elf32_arm_link_hash_entry
*) h
;
10789 if (h
->plt
.refcount
> 0)
10791 h
->plt
.refcount
-= 1;
10792 if (r_type
== R_ARM_THM_CALL
)
10793 eh
->plt_maybe_thumb_refcount
--;
10795 if (r_type
== R_ARM_THM_JUMP24
10796 || r_type
== R_ARM_THM_JUMP19
)
10797 eh
->plt_thumb_refcount
--;
10800 if (r_type
== R_ARM_ABS32
10801 || r_type
== R_ARM_REL32
10802 || r_type
== R_ARM_ABS32_NOI
10803 || r_type
== R_ARM_REL32_NOI
)
10805 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
;
10807 if (p
->section
== sec
)
10810 if (ELF32_R_TYPE (rel
->r_info
) == R_ARM_REL32
10811 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_REL32_NOI
)
10829 /* Look through the relocs for a section during the first phase. */
10832 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
10833 asection
*sec
, const Elf_Internal_Rela
*relocs
)
10835 Elf_Internal_Shdr
*symtab_hdr
;
10836 struct elf_link_hash_entry
**sym_hashes
;
10837 const Elf_Internal_Rela
*rel
;
10838 const Elf_Internal_Rela
*rel_end
;
10841 bfd_vma
*local_got_offsets
;
10842 struct elf32_arm_link_hash_table
*htab
;
10843 bfd_boolean needs_plt
;
10844 unsigned long nsyms
;
10846 if (info
->relocatable
)
10849 BFD_ASSERT (is_arm_elf (abfd
));
10851 htab
= elf32_arm_hash_table (info
);
10857 /* Create dynamic sections for relocatable executables so that we can
10858 copy relocations. */
10859 if (htab
->root
.is_relocatable_executable
10860 && ! htab
->root
.dynamic_sections_created
)
10862 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
10866 dynobj
= elf_hash_table (info
)->dynobj
;
10867 local_got_offsets
= elf_local_got_offsets (abfd
);
10869 symtab_hdr
= & elf_symtab_hdr (abfd
);
10870 sym_hashes
= elf_sym_hashes (abfd
);
10871 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
10873 rel_end
= relocs
+ sec
->reloc_count
;
10874 for (rel
= relocs
; rel
< rel_end
; rel
++)
10876 struct elf_link_hash_entry
*h
;
10877 struct elf32_arm_link_hash_entry
*eh
;
10878 unsigned long r_symndx
;
10881 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10882 r_type
= ELF32_R_TYPE (rel
->r_info
);
10883 r_type
= arm_real_reloc_type (htab
, r_type
);
10885 if (r_symndx
>= nsyms
10886 /* PR 9934: It is possible to have relocations that do not
10887 refer to symbols, thus it is also possible to have an
10888 object file containing relocations but no symbol table. */
10889 && (r_symndx
> 0 || nsyms
> 0))
10891 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
10896 if (nsyms
== 0 || r_symndx
< symtab_hdr
->sh_info
)
10900 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
10901 while (h
->root
.type
== bfd_link_hash_indirect
10902 || h
->root
.type
== bfd_link_hash_warning
)
10903 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10906 eh
= (struct elf32_arm_link_hash_entry
*) h
;
10911 case R_ARM_GOT_PREL
:
10912 case R_ARM_TLS_GD32
:
10913 case R_ARM_TLS_IE32
:
10914 /* This symbol requires a global offset table entry. */
10916 int tls_type
, old_tls_type
;
10920 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
10921 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
10922 default: tls_type
= GOT_NORMAL
; break;
10928 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
10932 bfd_signed_vma
*local_got_refcounts
;
10934 /* This is a global offset table entry for a local symbol. */
10935 local_got_refcounts
= elf_local_got_refcounts (abfd
);
10936 if (local_got_refcounts
== NULL
)
10938 bfd_size_type size
;
10940 size
= symtab_hdr
->sh_info
;
10941 size
*= (sizeof (bfd_signed_vma
) + sizeof (char));
10942 local_got_refcounts
= (bfd_signed_vma
*)
10943 bfd_zalloc (abfd
, size
);
10944 if (local_got_refcounts
== NULL
)
10946 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
10947 elf32_arm_local_got_tls_type (abfd
)
10948 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
10950 local_got_refcounts
[r_symndx
] += 1;
10951 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
10954 /* We will already have issued an error message if there is a
10955 TLS / non-TLS mismatch, based on the symbol type. We don't
10956 support any linker relaxations. So just combine any TLS
10958 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
10959 && tls_type
!= GOT_NORMAL
)
10960 tls_type
|= old_tls_type
;
10962 if (old_tls_type
!= tls_type
)
10965 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
10967 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
10970 /* Fall through. */
10972 case R_ARM_TLS_LDM32
:
10973 if (r_type
== R_ARM_TLS_LDM32
)
10974 htab
->tls_ldm_got
.refcount
++;
10975 /* Fall through. */
10977 case R_ARM_GOTOFF32
:
10979 if (htab
->sgot
== NULL
)
10981 if (htab
->root
.dynobj
== NULL
)
10982 htab
->root
.dynobj
= abfd
;
10983 if (!create_got_section (htab
->root
.dynobj
, info
))
10989 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
10990 ldr __GOTT_INDEX__ offsets. */
10991 if (!htab
->vxworks_p
)
10993 /* Fall through. */
11000 case R_ARM_THM_CALL
:
11001 case R_ARM_THM_JUMP24
:
11002 case R_ARM_THM_JUMP19
:
11006 case R_ARM_MOVW_ABS_NC
:
11007 case R_ARM_MOVT_ABS
:
11008 case R_ARM_THM_MOVW_ABS_NC
:
11009 case R_ARM_THM_MOVT_ABS
:
11012 (*_bfd_error_handler
)
11013 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
11014 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
11015 (h
) ? h
->root
.root
.string
: "a local symbol");
11016 bfd_set_error (bfd_error_bad_value
);
11020 /* Fall through. */
11022 case R_ARM_ABS32_NOI
:
11024 case R_ARM_REL32_NOI
:
11025 case R_ARM_MOVW_PREL_NC
:
11026 case R_ARM_MOVT_PREL
:
11027 case R_ARM_THM_MOVW_PREL_NC
:
11028 case R_ARM_THM_MOVT_PREL
:
11032 /* Should the interworking branches be listed here? */
11035 /* If this reloc is in a read-only section, we might
11036 need a copy reloc. We can't check reliably at this
11037 stage whether the section is read-only, as input
11038 sections have not yet been mapped to output sections.
11039 Tentatively set the flag for now, and correct in
11040 adjust_dynamic_symbol. */
11042 h
->non_got_ref
= 1;
11044 /* We may need a .plt entry if the function this reloc
11045 refers to is in a different object. We can't tell for
11046 sure yet, because something later might force the
11051 /* If we create a PLT entry, this relocation will reference
11052 it, even if it's an ABS32 relocation. */
11053 h
->plt
.refcount
+= 1;
11055 /* It's too early to use htab->use_blx here, so we have to
11056 record possible blx references separately from
11057 relocs that definitely need a thumb stub. */
11059 if (r_type
== R_ARM_THM_CALL
)
11060 eh
->plt_maybe_thumb_refcount
+= 1;
11062 if (r_type
== R_ARM_THM_JUMP24
11063 || r_type
== R_ARM_THM_JUMP19
)
11064 eh
->plt_thumb_refcount
+= 1;
11067 /* If we are creating a shared library or relocatable executable,
11068 and this is a reloc against a global symbol, or a non PC
11069 relative reloc against a local symbol, then we need to copy
11070 the reloc into the shared library. However, if we are linking
11071 with -Bsymbolic, we do not need to copy a reloc against a
11072 global symbol which is defined in an object we are
11073 including in the link (i.e., DEF_REGULAR is set). At
11074 this point we have not seen all the input files, so it is
11075 possible that DEF_REGULAR is not set now but will be set
11076 later (it is never cleared). We account for that
11077 possibility below by storing information in the
11078 relocs_copied field of the hash table entry. */
11079 if ((info
->shared
|| htab
->root
.is_relocatable_executable
)
11080 && (sec
->flags
& SEC_ALLOC
) != 0
11081 && ((r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
)
11082 || (h
!= NULL
&& ! h
->needs_plt
11083 && (! info
->symbolic
|| ! h
->def_regular
))))
11085 struct elf32_arm_relocs_copied
*p
, **head
;
11087 /* When creating a shared object, we must copy these
11088 reloc types into the output file. We create a reloc
11089 section in dynobj and make room for this reloc. */
11090 if (sreloc
== NULL
)
11092 sreloc
= _bfd_elf_make_dynamic_reloc_section
11093 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
11095 if (sreloc
== NULL
)
11098 /* BPABI objects never have dynamic relocations mapped. */
11099 if (htab
->symbian_p
)
11103 flags
= bfd_get_section_flags (dynobj
, sreloc
);
11104 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
11105 bfd_set_section_flags (dynobj
, sreloc
, flags
);
11109 /* If this is a global symbol, we count the number of
11110 relocations we need for this symbol. */
11113 head
= &((struct elf32_arm_link_hash_entry
*) h
)->relocs_copied
;
11117 /* Track dynamic relocs needed for local syms too.
11118 We really need local syms available to do this
11119 easily. Oh well. */
11122 Elf_Internal_Sym
*isym
;
11124 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
11129 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
11133 vpp
= &elf_section_data (s
)->local_dynrel
;
11134 head
= (struct elf32_arm_relocs_copied
**) vpp
;
11138 if (p
== NULL
|| p
->section
!= sec
)
11140 bfd_size_type amt
= sizeof *p
;
11142 p
= (struct elf32_arm_relocs_copied
*)
11143 bfd_alloc (htab
->root
.dynobj
, amt
);
11153 if (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
11159 /* This relocation describes the C++ object vtable hierarchy.
11160 Reconstruct it for later use during GC. */
11161 case R_ARM_GNU_VTINHERIT
:
11162 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
11166 /* This relocation describes which C++ vtable entries are actually
11167 used. Record for later use during GC. */
11168 case R_ARM_GNU_VTENTRY
:
11169 BFD_ASSERT (h
!= NULL
);
11171 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
11180 /* Unwinding tables are not referenced directly. This pass marks them as
11181 required if the corresponding code section is marked. */
11184 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
11185 elf_gc_mark_hook_fn gc_mark_hook
)
11188 Elf_Internal_Shdr
**elf_shdrp
;
11191 /* Marking EH data may cause additional code sections to be marked,
11192 requiring multiple passes. */
11197 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
11201 if (! is_arm_elf (sub
))
11204 elf_shdrp
= elf_elfsections (sub
);
11205 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
11207 Elf_Internal_Shdr
*hdr
;
11209 hdr
= &elf_section_data (o
)->this_hdr
;
11210 if (hdr
->sh_type
== SHT_ARM_EXIDX
11212 && hdr
->sh_link
< elf_numsections (sub
)
11214 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
11217 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
11227 /* Treat mapping symbols as special target symbols. */
11230 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
11232 return bfd_is_arm_special_symbol_name (sym
->name
,
11233 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
11236 /* This is a copy of elf_find_function() from elf.c except that
11237 ARM mapping symbols are ignored when looking for function names
11238 and STT_ARM_TFUNC is considered to a function type. */
11241 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
11242 asection
* section
,
11243 asymbol
** symbols
,
11245 const char ** filename_ptr
,
11246 const char ** functionname_ptr
)
11248 const char * filename
= NULL
;
11249 asymbol
* func
= NULL
;
11250 bfd_vma low_func
= 0;
11253 for (p
= symbols
; *p
!= NULL
; p
++)
11255 elf_symbol_type
*q
;
11257 q
= (elf_symbol_type
*) *p
;
11259 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
11264 filename
= bfd_asymbol_name (&q
->symbol
);
11267 case STT_ARM_TFUNC
:
11269 /* Skip mapping symbols. */
11270 if ((q
->symbol
.flags
& BSF_LOCAL
)
11271 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
11272 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
11274 /* Fall through. */
11275 if (bfd_get_section (&q
->symbol
) == section
11276 && q
->symbol
.value
>= low_func
11277 && q
->symbol
.value
<= offset
)
11279 func
= (asymbol
*) q
;
11280 low_func
= q
->symbol
.value
;
11290 *filename_ptr
= filename
;
11291 if (functionname_ptr
)
11292 *functionname_ptr
= bfd_asymbol_name (func
);
11298 /* Find the nearest line to a particular section and offset, for error
11299 reporting. This code is a duplicate of the code in elf.c, except
11300 that it uses arm_elf_find_function. */
11303 elf32_arm_find_nearest_line (bfd
* abfd
,
11304 asection
* section
,
11305 asymbol
** symbols
,
11307 const char ** filename_ptr
,
11308 const char ** functionname_ptr
,
11309 unsigned int * line_ptr
)
11311 bfd_boolean found
= FALSE
;
11313 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
11315 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
11316 filename_ptr
, functionname_ptr
,
11318 & elf_tdata (abfd
)->dwarf2_find_line_info
))
11320 if (!*functionname_ptr
)
11321 arm_elf_find_function (abfd
, section
, symbols
, offset
,
11322 *filename_ptr
? NULL
: filename_ptr
,
11328 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
11329 & found
, filename_ptr
,
11330 functionname_ptr
, line_ptr
,
11331 & elf_tdata (abfd
)->line_info
))
11334 if (found
&& (*functionname_ptr
|| *line_ptr
))
11337 if (symbols
== NULL
)
11340 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
11341 filename_ptr
, functionname_ptr
))
11349 elf32_arm_find_inliner_info (bfd
* abfd
,
11350 const char ** filename_ptr
,
11351 const char ** functionname_ptr
,
11352 unsigned int * line_ptr
)
11355 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
11356 functionname_ptr
, line_ptr
,
11357 & elf_tdata (abfd
)->dwarf2_find_line_info
);
11361 /* Adjust a symbol defined by a dynamic object and referenced by a
11362 regular object. The current definition is in some section of the
11363 dynamic object, but we're not including those sections. We have to
11364 change the definition to something the rest of the link can
11368 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
11369 struct elf_link_hash_entry
* h
)
11373 struct elf32_arm_link_hash_entry
* eh
;
11374 struct elf32_arm_link_hash_table
*globals
;
11376 globals
= elf32_arm_hash_table (info
);
11377 if (globals
== NULL
)
11380 dynobj
= elf_hash_table (info
)->dynobj
;
11382 /* Make sure we know what is going on here. */
11383 BFD_ASSERT (dynobj
!= NULL
11385 || h
->u
.weakdef
!= NULL
11388 && !h
->def_regular
)));
11390 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11392 /* If this is a function, put it in the procedure linkage table. We
11393 will fill in the contents of the procedure linkage table later,
11394 when we know the address of the .got section. */
11395 if (h
->type
== STT_FUNC
|| h
->type
== STT_ARM_TFUNC
11398 if (h
->plt
.refcount
<= 0
11399 || SYMBOL_CALLS_LOCAL (info
, h
)
11400 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
11401 && h
->root
.type
== bfd_link_hash_undefweak
))
11403 /* This case can occur if we saw a PLT32 reloc in an input
11404 file, but the symbol was never referred to by a dynamic
11405 object, or if all references were garbage collected. In
11406 such a case, we don't actually need to build a procedure
11407 linkage table, and we can just do a PC24 reloc instead. */
11408 h
->plt
.offset
= (bfd_vma
) -1;
11409 eh
->plt_thumb_refcount
= 0;
11410 eh
->plt_maybe_thumb_refcount
= 0;
11418 /* It's possible that we incorrectly decided a .plt reloc was
11419 needed for an R_ARM_PC24 or similar reloc to a non-function sym
11420 in check_relocs. We can't decide accurately between function
11421 and non-function syms in check-relocs; Objects loaded later in
11422 the link may change h->type. So fix it now. */
11423 h
->plt
.offset
= (bfd_vma
) -1;
11424 eh
->plt_thumb_refcount
= 0;
11425 eh
->plt_maybe_thumb_refcount
= 0;
11428 /* If this is a weak symbol, and there is a real definition, the
11429 processor independent code will have arranged for us to see the
11430 real definition first, and we can just use the same value. */
11431 if (h
->u
.weakdef
!= NULL
)
11433 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
11434 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
11435 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
11436 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
11440 /* If there are no non-GOT references, we do not need a copy
11442 if (!h
->non_got_ref
)
11445 /* This is a reference to a symbol defined by a dynamic object which
11446 is not a function. */
11448 /* If we are creating a shared library, we must presume that the
11449 only references to the symbol are via the global offset table.
11450 For such cases we need not do anything here; the relocations will
11451 be handled correctly by relocate_section. Relocatable executables
11452 can reference data in shared objects directly, so we don't need to
11453 do anything here. */
11454 if (info
->shared
|| globals
->root
.is_relocatable_executable
)
11459 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
11460 h
->root
.root
.string
);
11464 /* We must allocate the symbol in our .dynbss section, which will
11465 become part of the .bss section of the executable. There will be
11466 an entry for this symbol in the .dynsym section. The dynamic
11467 object will contain position independent code, so all references
11468 from the dynamic object to this symbol will go through the global
11469 offset table. The dynamic linker will use the .dynsym entry to
11470 determine the address it must put in the global offset table, so
11471 both the dynamic object and the regular object will refer to the
11472 same memory location for the variable. */
11473 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
11474 BFD_ASSERT (s
!= NULL
);
11476 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
11477 copy the initial value out of the dynamic object and into the
11478 runtime process image. We need to remember the offset into the
11479 .rel(a).bss section we are going to use. */
11480 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
11484 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (globals
, ".bss"));
11485 BFD_ASSERT (srel
!= NULL
);
11486 srel
->size
+= RELOC_SIZE (globals
);
11490 return _bfd_elf_adjust_dynamic_copy (h
, s
);
11493 /* Allocate space in .plt, .got and associated reloc sections for
11497 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
11499 struct bfd_link_info
*info
;
11500 struct elf32_arm_link_hash_table
*htab
;
11501 struct elf32_arm_link_hash_entry
*eh
;
11502 struct elf32_arm_relocs_copied
*p
;
11503 bfd_signed_vma thumb_refs
;
11505 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11507 if (h
->root
.type
== bfd_link_hash_indirect
)
11510 if (h
->root
.type
== bfd_link_hash_warning
)
11511 /* When warning symbols are created, they **replace** the "real"
11512 entry in the hash table, thus we never get to see the real
11513 symbol in a hash traversal. So look at it now. */
11514 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11516 info
= (struct bfd_link_info
*) inf
;
11517 htab
= elf32_arm_hash_table (info
);
11521 if (htab
->root
.dynamic_sections_created
11522 && h
->plt
.refcount
> 0)
11524 /* Make sure this symbol is output as a dynamic symbol.
11525 Undefined weak syms won't yet be marked as dynamic. */
11526 if (h
->dynindx
== -1
11527 && !h
->forced_local
)
11529 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11534 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
11536 asection
*s
= htab
->splt
;
11538 /* If this is the first .plt entry, make room for the special
11541 s
->size
+= htab
->plt_header_size
;
11543 h
->plt
.offset
= s
->size
;
11545 /* If we will insert a Thumb trampoline before this PLT, leave room
11547 thumb_refs
= eh
->plt_thumb_refcount
;
11548 if (!htab
->use_blx
)
11549 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
11551 if (thumb_refs
> 0)
11553 h
->plt
.offset
+= PLT_THUMB_STUB_SIZE
;
11554 s
->size
+= PLT_THUMB_STUB_SIZE
;
11557 /* If this symbol is not defined in a regular file, and we are
11558 not generating a shared library, then set the symbol to this
11559 location in the .plt. This is required to make function
11560 pointers compare as equal between the normal executable and
11561 the shared library. */
11563 && !h
->def_regular
)
11565 h
->root
.u
.def
.section
= s
;
11566 h
->root
.u
.def
.value
= h
->plt
.offset
;
11568 /* Make sure the function is not marked as Thumb, in case
11569 it is the target of an ABS32 relocation, which will
11570 point to the PLT entry. */
11571 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
11572 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
11575 /* Make room for this entry. */
11576 s
->size
+= htab
->plt_entry_size
;
11578 if (!htab
->symbian_p
)
11580 /* We also need to make an entry in the .got.plt section, which
11581 will be placed in the .got section by the linker script. */
11582 eh
->plt_got_offset
= htab
->sgotplt
->size
;
11583 htab
->sgotplt
->size
+= 4;
11586 /* We also need to make an entry in the .rel(a).plt section. */
11587 htab
->srelplt
->size
+= RELOC_SIZE (htab
);
11589 /* VxWorks executables have a second set of relocations for
11590 each PLT entry. They go in a separate relocation section,
11591 which is processed by the kernel loader. */
11592 if (htab
->vxworks_p
&& !info
->shared
)
11594 /* There is a relocation for the initial PLT entry:
11595 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
11596 if (h
->plt
.offset
== htab
->plt_header_size
)
11597 htab
->srelplt2
->size
+= RELOC_SIZE (htab
);
11599 /* There are two extra relocations for each subsequent
11600 PLT entry: an R_ARM_32 relocation for the GOT entry,
11601 and an R_ARM_32 relocation for the PLT entry. */
11602 htab
->srelplt2
->size
+= RELOC_SIZE (htab
) * 2;
11607 h
->plt
.offset
= (bfd_vma
) -1;
11613 h
->plt
.offset
= (bfd_vma
) -1;
11617 if (h
->got
.refcount
> 0)
11621 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
11624 /* Make sure this symbol is output as a dynamic symbol.
11625 Undefined weak syms won't yet be marked as dynamic. */
11626 if (h
->dynindx
== -1
11627 && !h
->forced_local
)
11629 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11633 if (!htab
->symbian_p
)
11636 h
->got
.offset
= s
->size
;
11638 if (tls_type
== GOT_UNKNOWN
)
11641 if (tls_type
== GOT_NORMAL
)
11642 /* Non-TLS symbols need one GOT slot. */
11646 if (tls_type
& GOT_TLS_GD
)
11647 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
11649 if (tls_type
& GOT_TLS_IE
)
11650 /* R_ARM_TLS_IE32 needs one GOT slot. */
11654 dyn
= htab
->root
.dynamic_sections_created
;
11657 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
11659 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
11662 if (tls_type
!= GOT_NORMAL
11663 && (info
->shared
|| indx
!= 0)
11664 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11665 || h
->root
.type
!= bfd_link_hash_undefweak
))
11667 if (tls_type
& GOT_TLS_IE
)
11668 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11670 if (tls_type
& GOT_TLS_GD
)
11671 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11673 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
11674 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11676 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11677 || h
->root
.type
!= bfd_link_hash_undefweak
)
11679 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
11680 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11684 h
->got
.offset
= (bfd_vma
) -1;
11686 /* Allocate stubs for exported Thumb functions on v4t. */
11687 if (!htab
->use_blx
&& h
->dynindx
!= -1
11689 && ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
11690 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
11692 struct elf_link_hash_entry
* th
;
11693 struct bfd_link_hash_entry
* bh
;
11694 struct elf_link_hash_entry
* myh
;
11698 /* Create a new symbol to regist the real location of the function. */
11699 s
= h
->root
.u
.def
.section
;
11700 sprintf (name
, "__real_%s", h
->root
.root
.string
);
11701 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
11702 name
, BSF_GLOBAL
, s
,
11703 h
->root
.u
.def
.value
,
11704 NULL
, TRUE
, FALSE
, &bh
);
11706 myh
= (struct elf_link_hash_entry
*) bh
;
11707 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_ARM_TFUNC
);
11708 myh
->forced_local
= 1;
11709 eh
->export_glue
= myh
;
11710 th
= record_arm_to_thumb_glue (info
, h
);
11711 /* Point the symbol at the stub. */
11712 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
11713 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
11714 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
11717 if (eh
->relocs_copied
== NULL
)
11720 /* In the shared -Bsymbolic case, discard space allocated for
11721 dynamic pc-relative relocs against symbols which turn out to be
11722 defined in regular objects. For the normal shared case, discard
11723 space for pc-relative relocs that have become local due to symbol
11724 visibility changes. */
11726 if (info
->shared
|| htab
->root
.is_relocatable_executable
)
11728 /* The only relocs that use pc_count are R_ARM_REL32 and
11729 R_ARM_REL32_NOI, which will appear on something like
11730 ".long foo - .". We want calls to protected symbols to resolve
11731 directly to the function rather than going via the plt. If people
11732 want function pointer comparisons to work as expected then they
11733 should avoid writing assembly like ".long foo - .". */
11734 if (SYMBOL_CALLS_LOCAL (info
, h
))
11736 struct elf32_arm_relocs_copied
**pp
;
11738 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
; )
11740 p
->count
-= p
->pc_count
;
11749 if (htab
->vxworks_p
)
11751 struct elf32_arm_relocs_copied
**pp
;
11753 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
; )
11755 if (strcmp (p
->section
->output_section
->name
, ".tls_vars") == 0)
11762 /* Also discard relocs on undefined weak syms with non-default
11764 if (eh
->relocs_copied
!= NULL
11765 && h
->root
.type
== bfd_link_hash_undefweak
)
11767 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
11768 eh
->relocs_copied
= NULL
;
11770 /* Make sure undefined weak symbols are output as a dynamic
11772 else if (h
->dynindx
== -1
11773 && !h
->forced_local
)
11775 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11780 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
11781 && h
->root
.type
== bfd_link_hash_new
)
11783 /* Output absolute symbols so that we can create relocations
11784 against them. For normal symbols we output a relocation
11785 against the section that contains them. */
11786 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11793 /* For the non-shared case, discard space for relocs against
11794 symbols which turn out to need copy relocs or are not
11797 if (!h
->non_got_ref
11798 && ((h
->def_dynamic
11799 && !h
->def_regular
)
11800 || (htab
->root
.dynamic_sections_created
11801 && (h
->root
.type
== bfd_link_hash_undefweak
11802 || h
->root
.type
== bfd_link_hash_undefined
))))
11804 /* Make sure this symbol is output as a dynamic symbol.
11805 Undefined weak syms won't yet be marked as dynamic. */
11806 if (h
->dynindx
== -1
11807 && !h
->forced_local
)
11809 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11813 /* If that succeeded, we know we'll be keeping all the
11815 if (h
->dynindx
!= -1)
11819 eh
->relocs_copied
= NULL
;
11824 /* Finally, allocate space. */
11825 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
11827 asection
*sreloc
= elf_section_data (p
->section
)->sreloc
;
11828 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
11834 /* Find any dynamic relocs that apply to read-only sections. */
11837 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
11839 struct elf32_arm_link_hash_entry
* eh
;
11840 struct elf32_arm_relocs_copied
* p
;
11842 if (h
->root
.type
== bfd_link_hash_warning
)
11843 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11845 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11846 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
11848 asection
*s
= p
->section
;
11850 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
11852 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
11854 info
->flags
|= DF_TEXTREL
;
11856 /* Not an error, just cut short the traversal. */
11864 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
11867 struct elf32_arm_link_hash_table
*globals
;
11869 globals
= elf32_arm_hash_table (info
);
11870 if (globals
== NULL
)
11873 globals
->byteswap_code
= byteswap_code
;
11876 /* Set the sizes of the dynamic sections. */
11879 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
11880 struct bfd_link_info
* info
)
11885 bfd_boolean relocs
;
11887 struct elf32_arm_link_hash_table
*htab
;
11889 htab
= elf32_arm_hash_table (info
);
11893 dynobj
= elf_hash_table (info
)->dynobj
;
11894 BFD_ASSERT (dynobj
!= NULL
);
11895 check_use_blx (htab
);
11897 if (elf_hash_table (info
)->dynamic_sections_created
)
11899 /* Set the contents of the .interp section to the interpreter. */
11900 if (info
->executable
)
11902 s
= bfd_get_section_by_name (dynobj
, ".interp");
11903 BFD_ASSERT (s
!= NULL
);
11904 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
11905 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
11909 /* Set up .got offsets for local syms, and space for local dynamic
11911 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11913 bfd_signed_vma
*local_got
;
11914 bfd_signed_vma
*end_local_got
;
11915 char *local_tls_type
;
11916 bfd_size_type locsymcount
;
11917 Elf_Internal_Shdr
*symtab_hdr
;
11919 bfd_boolean is_vxworks
= htab
->vxworks_p
;
11921 if (! is_arm_elf (ibfd
))
11924 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
11926 struct elf32_arm_relocs_copied
*p
;
11928 for (p
= (struct elf32_arm_relocs_copied
*)
11929 elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
11931 if (!bfd_is_abs_section (p
->section
)
11932 && bfd_is_abs_section (p
->section
->output_section
))
11934 /* Input section has been discarded, either because
11935 it is a copy of a linkonce section or due to
11936 linker script /DISCARD/, so we'll be discarding
11939 else if (is_vxworks
11940 && strcmp (p
->section
->output_section
->name
,
11943 /* Relocations in vxworks .tls_vars sections are
11944 handled specially by the loader. */
11946 else if (p
->count
!= 0)
11948 srel
= elf_section_data (p
->section
)->sreloc
;
11949 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
11950 if ((p
->section
->output_section
->flags
& SEC_READONLY
) != 0)
11951 info
->flags
|= DF_TEXTREL
;
11956 local_got
= elf_local_got_refcounts (ibfd
);
11960 symtab_hdr
= & elf_symtab_hdr (ibfd
);
11961 locsymcount
= symtab_hdr
->sh_info
;
11962 end_local_got
= local_got
+ locsymcount
;
11963 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
11965 srel
= htab
->srelgot
;
11966 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
11968 if (*local_got
> 0)
11970 *local_got
= s
->size
;
11971 if (*local_tls_type
& GOT_TLS_GD
)
11972 /* TLS_GD relocs need an 8-byte structure in the GOT. */
11974 if (*local_tls_type
& GOT_TLS_IE
)
11976 if (*local_tls_type
== GOT_NORMAL
)
11979 if (info
->shared
|| *local_tls_type
== GOT_TLS_GD
)
11980 srel
->size
+= RELOC_SIZE (htab
);
11983 *local_got
= (bfd_vma
) -1;
11987 if (htab
->tls_ldm_got
.refcount
> 0)
11989 /* Allocate two GOT entries and one dynamic relocation (if necessary)
11990 for R_ARM_TLS_LDM32 relocations. */
11991 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
11992 htab
->sgot
->size
+= 8;
11994 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11997 htab
->tls_ldm_got
.offset
= -1;
11999 /* Allocate global sym .plt and .got entries, and space for global
12000 sym dynamic relocs. */
12001 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs
, info
);
12003 /* Here we rummage through the found bfds to collect glue information. */
12004 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
12006 if (! is_arm_elf (ibfd
))
12009 /* Initialise mapping tables for code/data. */
12010 bfd_elf32_arm_init_maps (ibfd
);
12012 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
12013 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
))
12014 /* xgettext:c-format */
12015 _bfd_error_handler (_("Errors encountered processing file %s"),
12019 /* Allocate space for the glue sections now that we've sized them. */
12020 bfd_elf32_arm_allocate_interworking_sections (info
);
12022 /* The check_relocs and adjust_dynamic_symbol entry points have
12023 determined the sizes of the various dynamic sections. Allocate
12024 memory for them. */
12027 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
12031 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
12034 /* It's OK to base decisions on the section name, because none
12035 of the dynobj section names depend upon the input files. */
12036 name
= bfd_get_section_name (dynobj
, s
);
12038 if (strcmp (name
, ".plt") == 0)
12040 /* Remember whether there is a PLT. */
12041 plt
= s
->size
!= 0;
12043 else if (CONST_STRNEQ (name
, ".rel"))
12047 /* Remember whether there are any reloc sections other
12048 than .rel(a).plt and .rela.plt.unloaded. */
12049 if (s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
12052 /* We use the reloc_count field as a counter if we need
12053 to copy relocs into the output file. */
12054 s
->reloc_count
= 0;
12057 else if (! CONST_STRNEQ (name
, ".got")
12058 && strcmp (name
, ".dynbss") != 0)
12060 /* It's not one of our sections, so don't allocate space. */
12066 /* If we don't need this section, strip it from the
12067 output file. This is mostly to handle .rel(a).bss and
12068 .rel(a).plt. We must create both sections in
12069 create_dynamic_sections, because they must be created
12070 before the linker maps input sections to output
12071 sections. The linker does that before
12072 adjust_dynamic_symbol is called, and it is that
12073 function which decides whether anything needs to go
12074 into these sections. */
12075 s
->flags
|= SEC_EXCLUDE
;
12079 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
12082 /* Allocate memory for the section contents. */
12083 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
12084 if (s
->contents
== NULL
)
12088 if (elf_hash_table (info
)->dynamic_sections_created
)
12090 /* Add some entries to the .dynamic section. We fill in the
12091 values later, in elf32_arm_finish_dynamic_sections, but we
12092 must add the entries now so that we get the correct size for
12093 the .dynamic section. The DT_DEBUG entry is filled in by the
12094 dynamic linker and used by the debugger. */
12095 #define add_dynamic_entry(TAG, VAL) \
12096 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
12098 if (info
->executable
)
12100 if (!add_dynamic_entry (DT_DEBUG
, 0))
12106 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
12107 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
12108 || !add_dynamic_entry (DT_PLTREL
,
12109 htab
->use_rel
? DT_REL
: DT_RELA
)
12110 || !add_dynamic_entry (DT_JMPREL
, 0))
12118 if (!add_dynamic_entry (DT_REL
, 0)
12119 || !add_dynamic_entry (DT_RELSZ
, 0)
12120 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
12125 if (!add_dynamic_entry (DT_RELA
, 0)
12126 || !add_dynamic_entry (DT_RELASZ
, 0)
12127 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
12132 /* If any dynamic relocs apply to a read-only section,
12133 then we need a DT_TEXTREL entry. */
12134 if ((info
->flags
& DF_TEXTREL
) == 0)
12135 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
12138 if ((info
->flags
& DF_TEXTREL
) != 0)
12140 if (!add_dynamic_entry (DT_TEXTREL
, 0))
12143 if (htab
->vxworks_p
12144 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
12147 #undef add_dynamic_entry
12152 /* Finish up dynamic symbol handling. We set the contents of various
12153 dynamic sections here. */
12156 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
12157 struct bfd_link_info
* info
,
12158 struct elf_link_hash_entry
* h
,
12159 Elf_Internal_Sym
* sym
)
12162 struct elf32_arm_link_hash_table
*htab
;
12163 struct elf32_arm_link_hash_entry
*eh
;
12165 dynobj
= elf_hash_table (info
)->dynobj
;
12166 htab
= elf32_arm_hash_table (info
);
12170 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12172 if (h
->plt
.offset
!= (bfd_vma
) -1)
12178 Elf_Internal_Rela rel
;
12180 /* This symbol has an entry in the procedure linkage table. Set
12183 BFD_ASSERT (h
->dynindx
!= -1);
12185 splt
= bfd_get_section_by_name (dynobj
, ".plt");
12186 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (htab
, ".plt"));
12187 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
12189 /* Fill in the entry in the procedure linkage table. */
12190 if (htab
->symbian_p
)
12192 put_arm_insn (htab
, output_bfd
,
12193 elf32_arm_symbian_plt_entry
[0],
12194 splt
->contents
+ h
->plt
.offset
);
12195 bfd_put_32 (output_bfd
,
12196 elf32_arm_symbian_plt_entry
[1],
12197 splt
->contents
+ h
->plt
.offset
+ 4);
12199 /* Fill in the entry in the .rel.plt section. */
12200 rel
.r_offset
= (splt
->output_section
->vma
12201 + splt
->output_offset
12202 + h
->plt
.offset
+ 4);
12203 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
12205 /* Get the index in the procedure linkage table which
12206 corresponds to this symbol. This is the index of this symbol
12207 in all the symbols for which we are making plt entries. The
12208 first entry in the procedure linkage table is reserved. */
12209 plt_index
= ((h
->plt
.offset
- htab
->plt_header_size
)
12210 / htab
->plt_entry_size
);
12214 bfd_vma got_offset
, got_address
, plt_address
;
12215 bfd_vma got_displacement
;
12219 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
12220 BFD_ASSERT (sgot
!= NULL
);
12222 /* Get the offset into the .got.plt table of the entry that
12223 corresponds to this function. */
12224 got_offset
= eh
->plt_got_offset
;
12226 /* Get the index in the procedure linkage table which
12227 corresponds to this symbol. This is the index of this symbol
12228 in all the symbols for which we are making plt entries. The
12229 first three entries in .got.plt are reserved; after that
12230 symbols appear in the same order as in .plt. */
12231 plt_index
= (got_offset
- 12) / 4;
12233 /* Calculate the address of the GOT entry. */
12234 got_address
= (sgot
->output_section
->vma
12235 + sgot
->output_offset
12238 /* ...and the address of the PLT entry. */
12239 plt_address
= (splt
->output_section
->vma
12240 + splt
->output_offset
12243 ptr
= htab
->splt
->contents
+ h
->plt
.offset
;
12244 if (htab
->vxworks_p
&& info
->shared
)
12249 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
12251 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
12253 val
|= got_address
- sgot
->output_section
->vma
;
12255 val
|= plt_index
* RELOC_SIZE (htab
);
12256 if (i
== 2 || i
== 5)
12257 bfd_put_32 (output_bfd
, val
, ptr
);
12259 put_arm_insn (htab
, output_bfd
, val
, ptr
);
12262 else if (htab
->vxworks_p
)
12267 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
12269 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
12271 val
|= got_address
;
12273 val
|= 0xffffff & -((h
->plt
.offset
+ i
* 4 + 8) >> 2);
12275 val
|= plt_index
* RELOC_SIZE (htab
);
12276 if (i
== 2 || i
== 5)
12277 bfd_put_32 (output_bfd
, val
, ptr
);
12279 put_arm_insn (htab
, output_bfd
, val
, ptr
);
12282 loc
= (htab
->srelplt2
->contents
12283 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
12285 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
12286 referencing the GOT for this PLT entry. */
12287 rel
.r_offset
= plt_address
+ 8;
12288 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12289 rel
.r_addend
= got_offset
;
12290 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12291 loc
+= RELOC_SIZE (htab
);
12293 /* Create the R_ARM_ABS32 relocation referencing the
12294 beginning of the PLT for this GOT entry. */
12295 rel
.r_offset
= got_address
;
12296 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
12298 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12302 bfd_signed_vma thumb_refs
;
12303 /* Calculate the displacement between the PLT slot and the
12304 entry in the GOT. The eight-byte offset accounts for the
12305 value produced by adding to pc in the first instruction
12306 of the PLT stub. */
12307 got_displacement
= got_address
- (plt_address
+ 8);
12309 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
12311 thumb_refs
= eh
->plt_thumb_refcount
;
12312 if (!htab
->use_blx
)
12313 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
12315 if (thumb_refs
> 0)
12317 put_thumb_insn (htab
, output_bfd
,
12318 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
12319 put_thumb_insn (htab
, output_bfd
,
12320 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
12323 put_arm_insn (htab
, output_bfd
,
12324 elf32_arm_plt_entry
[0]
12325 | ((got_displacement
& 0x0ff00000) >> 20),
12327 put_arm_insn (htab
, output_bfd
,
12328 elf32_arm_plt_entry
[1]
12329 | ((got_displacement
& 0x000ff000) >> 12),
12331 put_arm_insn (htab
, output_bfd
,
12332 elf32_arm_plt_entry
[2]
12333 | (got_displacement
& 0x00000fff),
12335 #ifdef FOUR_WORD_PLT
12336 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3], ptr
+ 12);
12340 /* Fill in the entry in the global offset table. */
12341 bfd_put_32 (output_bfd
,
12342 (splt
->output_section
->vma
12343 + splt
->output_offset
),
12344 sgot
->contents
+ got_offset
);
12346 /* Fill in the entry in the .rel(a).plt section. */
12348 rel
.r_offset
= got_address
;
12349 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_JUMP_SLOT
);
12352 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
12353 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12355 if (!h
->def_regular
)
12357 /* Mark the symbol as undefined, rather than as defined in
12358 the .plt section. Leave the value alone. */
12359 sym
->st_shndx
= SHN_UNDEF
;
12360 /* If the symbol is weak, we do need to clear the value.
12361 Otherwise, the PLT entry would provide a definition for
12362 the symbol even if the symbol wasn't defined anywhere,
12363 and so the symbol would never be NULL. */
12364 if (!h
->ref_regular_nonweak
)
12369 if (h
->got
.offset
!= (bfd_vma
) -1
12370 && (elf32_arm_hash_entry (h
)->tls_type
& GOT_TLS_GD
) == 0
12371 && (elf32_arm_hash_entry (h
)->tls_type
& GOT_TLS_IE
) == 0)
12375 Elf_Internal_Rela rel
;
12379 /* This symbol has an entry in the global offset table. Set it
12381 sgot
= bfd_get_section_by_name (dynobj
, ".got");
12382 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (htab
, ".got"));
12383 BFD_ASSERT (sgot
!= NULL
&& srel
!= NULL
);
12385 offset
= (h
->got
.offset
& ~(bfd_vma
) 1);
12387 rel
.r_offset
= (sgot
->output_section
->vma
12388 + sgot
->output_offset
12391 /* If this is a static link, or it is a -Bsymbolic link and the
12392 symbol is defined locally or was forced to be local because
12393 of a version file, we just want to emit a RELATIVE reloc.
12394 The entry in the global offset table will already have been
12395 initialized in the relocate_section function. */
12397 && SYMBOL_REFERENCES_LOCAL (info
, h
))
12399 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
12400 rel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
12401 if (!htab
->use_rel
)
12403 rel
.r_addend
= bfd_get_32 (output_bfd
, sgot
->contents
+ offset
);
12404 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
12409 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
12410 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
12411 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
12414 loc
= srel
->contents
+ srel
->reloc_count
++ * RELOC_SIZE (htab
);
12415 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12421 Elf_Internal_Rela rel
;
12424 /* This symbol needs a copy reloc. Set it up. */
12425 BFD_ASSERT (h
->dynindx
!= -1
12426 && (h
->root
.type
== bfd_link_hash_defined
12427 || h
->root
.type
== bfd_link_hash_defweak
));
12429 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
12430 RELOC_SECTION (htab
, ".bss"));
12431 BFD_ASSERT (s
!= NULL
);
12434 rel
.r_offset
= (h
->root
.u
.def
.value
12435 + h
->root
.u
.def
.section
->output_section
->vma
12436 + h
->root
.u
.def
.section
->output_offset
);
12437 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
12438 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
12439 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12442 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
12443 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
12444 to the ".got" section. */
12445 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
12446 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
12447 sym
->st_shndx
= SHN_ABS
;
12452 /* Finish up the dynamic sections. */
12455 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
12460 struct elf32_arm_link_hash_table
*htab
;
12462 htab
= elf32_arm_hash_table (info
);
12466 dynobj
= elf_hash_table (info
)->dynobj
;
12468 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
12469 BFD_ASSERT (htab
->symbian_p
|| sgot
!= NULL
);
12470 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
12472 if (elf_hash_table (info
)->dynamic_sections_created
)
12475 Elf32_External_Dyn
*dyncon
, *dynconend
;
12477 splt
= bfd_get_section_by_name (dynobj
, ".plt");
12478 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
12480 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
12481 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
12483 for (; dyncon
< dynconend
; dyncon
++)
12485 Elf_Internal_Dyn dyn
;
12489 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
12496 if (htab
->vxworks_p
12497 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
12498 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12503 goto get_vma_if_bpabi
;
12506 goto get_vma_if_bpabi
;
12509 goto get_vma_if_bpabi
;
12511 name
= ".gnu.version";
12512 goto get_vma_if_bpabi
;
12514 name
= ".gnu.version_d";
12515 goto get_vma_if_bpabi
;
12517 name
= ".gnu.version_r";
12518 goto get_vma_if_bpabi
;
12524 name
= RELOC_SECTION (htab
, ".plt");
12526 s
= bfd_get_section_by_name (output_bfd
, name
);
12527 BFD_ASSERT (s
!= NULL
);
12528 if (!htab
->symbian_p
)
12529 dyn
.d_un
.d_ptr
= s
->vma
;
12531 /* In the BPABI, tags in the PT_DYNAMIC section point
12532 at the file offset, not the memory address, for the
12533 convenience of the post linker. */
12534 dyn
.d_un
.d_ptr
= s
->filepos
;
12535 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12539 if (htab
->symbian_p
)
12544 s
= bfd_get_section_by_name (output_bfd
,
12545 RELOC_SECTION (htab
, ".plt"));
12546 BFD_ASSERT (s
!= NULL
);
12547 dyn
.d_un
.d_val
= s
->size
;
12548 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12553 if (!htab
->symbian_p
)
12555 /* My reading of the SVR4 ABI indicates that the
12556 procedure linkage table relocs (DT_JMPREL) should be
12557 included in the overall relocs (DT_REL). This is
12558 what Solaris does. However, UnixWare can not handle
12559 that case. Therefore, we override the DT_RELSZ entry
12560 here to make it not include the JMPREL relocs. Since
12561 the linker script arranges for .rel(a).plt to follow all
12562 other relocation sections, we don't have to worry
12563 about changing the DT_REL entry. */
12564 s
= bfd_get_section_by_name (output_bfd
,
12565 RELOC_SECTION (htab
, ".plt"));
12567 dyn
.d_un
.d_val
-= s
->size
;
12568 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12571 /* Fall through. */
12575 /* In the BPABI, the DT_REL tag must point at the file
12576 offset, not the VMA, of the first relocation
12577 section. So, we use code similar to that in
12578 elflink.c, but do not check for SHF_ALLOC on the
12579 relcoation section, since relocations sections are
12580 never allocated under the BPABI. The comments above
12581 about Unixware notwithstanding, we include all of the
12582 relocations here. */
12583 if (htab
->symbian_p
)
12586 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
12587 ? SHT_REL
: SHT_RELA
);
12588 dyn
.d_un
.d_val
= 0;
12589 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
12591 Elf_Internal_Shdr
*hdr
12592 = elf_elfsections (output_bfd
)[i
];
12593 if (hdr
->sh_type
== type
)
12595 if (dyn
.d_tag
== DT_RELSZ
12596 || dyn
.d_tag
== DT_RELASZ
)
12597 dyn
.d_un
.d_val
+= hdr
->sh_size
;
12598 else if ((ufile_ptr
) hdr
->sh_offset
12599 <= dyn
.d_un
.d_val
- 1)
12600 dyn
.d_un
.d_val
= hdr
->sh_offset
;
12603 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12607 /* Set the bottom bit of DT_INIT/FINI if the
12608 corresponding function is Thumb. */
12610 name
= info
->init_function
;
12613 name
= info
->fini_function
;
12615 /* If it wasn't set by elf_bfd_final_link
12616 then there is nothing to adjust. */
12617 if (dyn
.d_un
.d_val
!= 0)
12619 struct elf_link_hash_entry
* eh
;
12621 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
12622 FALSE
, FALSE
, TRUE
);
12624 && ELF_ST_TYPE (eh
->type
) == STT_ARM_TFUNC
)
12626 dyn
.d_un
.d_val
|= 1;
12627 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12634 /* Fill in the first entry in the procedure linkage table. */
12635 if (splt
->size
> 0 && htab
->plt_header_size
)
12637 const bfd_vma
*plt0_entry
;
12638 bfd_vma got_address
, plt_address
, got_displacement
;
12640 /* Calculate the addresses of the GOT and PLT. */
12641 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
12642 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
12644 if (htab
->vxworks_p
)
12646 /* The VxWorks GOT is relocated by the dynamic linker.
12647 Therefore, we must emit relocations rather than simply
12648 computing the values now. */
12649 Elf_Internal_Rela rel
;
12651 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
12652 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
12653 splt
->contents
+ 0);
12654 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
12655 splt
->contents
+ 4);
12656 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
12657 splt
->contents
+ 8);
12658 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
12660 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
12661 rel
.r_offset
= plt_address
+ 12;
12662 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12664 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
12665 htab
->srelplt2
->contents
);
12669 got_displacement
= got_address
- (plt_address
+ 16);
12671 plt0_entry
= elf32_arm_plt0_entry
;
12672 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
12673 splt
->contents
+ 0);
12674 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
12675 splt
->contents
+ 4);
12676 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
12677 splt
->contents
+ 8);
12678 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
12679 splt
->contents
+ 12);
12681 #ifdef FOUR_WORD_PLT
12682 /* The displacement value goes in the otherwise-unused
12683 last word of the second entry. */
12684 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
12686 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
12691 /* UnixWare sets the entsize of .plt to 4, although that doesn't
12692 really seem like the right value. */
12693 if (splt
->output_section
->owner
== output_bfd
)
12694 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
12696 if (htab
->vxworks_p
&& !info
->shared
&& htab
->splt
->size
> 0)
12698 /* Correct the .rel(a).plt.unloaded relocations. They will have
12699 incorrect symbol indexes. */
12703 num_plts
= ((htab
->splt
->size
- htab
->plt_header_size
)
12704 / htab
->plt_entry_size
);
12705 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
12707 for (; num_plts
; num_plts
--)
12709 Elf_Internal_Rela rel
;
12711 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
12712 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12713 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
12714 p
+= RELOC_SIZE (htab
);
12716 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
12717 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
12718 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
12719 p
+= RELOC_SIZE (htab
);
12724 /* Fill in the first three entries in the global offset table. */
12727 if (sgot
->size
> 0)
12730 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
12732 bfd_put_32 (output_bfd
,
12733 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
12735 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
12736 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
12739 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
12746 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
12748 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
12749 struct elf32_arm_link_hash_table
*globals
;
12751 i_ehdrp
= elf_elfheader (abfd
);
12753 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
12754 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
12756 i_ehdrp
->e_ident
[EI_OSABI
] = 0;
12757 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
12761 globals
= elf32_arm_hash_table (link_info
);
12762 if (globals
!= NULL
&& globals
->byteswap_code
)
12763 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
12767 static enum elf_reloc_type_class
12768 elf32_arm_reloc_type_class (const Elf_Internal_Rela
*rela
)
12770 switch ((int) ELF32_R_TYPE (rela
->r_info
))
12772 case R_ARM_RELATIVE
:
12773 return reloc_class_relative
;
12774 case R_ARM_JUMP_SLOT
:
12775 return reloc_class_plt
;
12777 return reloc_class_copy
;
12779 return reloc_class_normal
;
12783 /* Set the right machine number for an Arm ELF file. */
12786 elf32_arm_section_flags (flagword
*flags
, const Elf_Internal_Shdr
*hdr
)
12788 if (hdr
->sh_type
== SHT_NOTE
)
12789 *flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_SAME_CONTENTS
;
12795 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
12797 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
12800 /* Return TRUE if this is an unwinding table entry. */
12803 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
12805 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
12806 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
12810 /* Set the type and flags for an ARM section. We do this by
12811 the section name, which is a hack, but ought to work. */
12814 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
12818 name
= bfd_get_section_name (abfd
, sec
);
12820 if (is_arm_elf_unwind_section_name (abfd
, name
))
12822 hdr
->sh_type
= SHT_ARM_EXIDX
;
12823 hdr
->sh_flags
|= SHF_LINK_ORDER
;
12828 /* Handle an ARM specific section when reading an object file. This is
12829 called when bfd_section_from_shdr finds a section with an unknown
12833 elf32_arm_section_from_shdr (bfd
*abfd
,
12834 Elf_Internal_Shdr
* hdr
,
12838 /* There ought to be a place to keep ELF backend specific flags, but
12839 at the moment there isn't one. We just keep track of the
12840 sections by their name, instead. Fortunately, the ABI gives
12841 names for all the ARM specific sections, so we will probably get
12843 switch (hdr
->sh_type
)
12845 case SHT_ARM_EXIDX
:
12846 case SHT_ARM_PREEMPTMAP
:
12847 case SHT_ARM_ATTRIBUTES
:
12854 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
12860 static _arm_elf_section_data
*
12861 get_arm_elf_section_data (asection
* sec
)
12863 if (sec
&& sec
->owner
&& is_arm_elf (sec
->owner
))
12864 return elf32_arm_section_data (sec
);
12872 struct bfd_link_info
*info
;
12875 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
12876 asection
*, struct elf_link_hash_entry
*);
12877 } output_arch_syminfo
;
12879 enum map_symbol_type
12887 /* Output a single mapping symbol. */
12890 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
12891 enum map_symbol_type type
,
12894 static const char *names
[3] = {"$a", "$t", "$d"};
12895 Elf_Internal_Sym sym
;
12897 sym
.st_value
= osi
->sec
->output_section
->vma
12898 + osi
->sec
->output_offset
12902 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
12903 sym
.st_shndx
= osi
->sec_shndx
;
12904 elf32_arm_section_map_add (osi
->sec
, names
[type
][1], offset
);
12905 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
12909 /* Output mapping symbols for PLT entries associated with H. */
12912 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
12914 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
12915 struct elf32_arm_link_hash_table
*htab
;
12916 struct elf32_arm_link_hash_entry
*eh
;
12919 if (h
->root
.type
== bfd_link_hash_indirect
)
12922 if (h
->root
.type
== bfd_link_hash_warning
)
12923 /* When warning symbols are created, they **replace** the "real"
12924 entry in the hash table, thus we never get to see the real
12925 symbol in a hash traversal. So look at it now. */
12926 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12928 if (h
->plt
.offset
== (bfd_vma
) -1)
12931 htab
= elf32_arm_hash_table (osi
->info
);
12935 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12936 addr
= h
->plt
.offset
;
12937 if (htab
->symbian_p
)
12939 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12941 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
12944 else if (htab
->vxworks_p
)
12946 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12948 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
12950 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
12952 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
12957 bfd_signed_vma thumb_refs
;
12959 thumb_refs
= eh
->plt_thumb_refcount
;
12960 if (!htab
->use_blx
)
12961 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
12963 if (thumb_refs
> 0)
12965 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
12968 #ifdef FOUR_WORD_PLT
12969 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12971 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
12974 /* A three-word PLT with no Thumb thunk contains only Arm code,
12975 so only need to output a mapping symbol for the first PLT entry and
12976 entries with thumb thunks. */
12977 if (thumb_refs
> 0 || addr
== 20)
12979 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12988 /* Output a single local symbol for a generated stub. */
12991 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
12992 bfd_vma offset
, bfd_vma size
)
12994 Elf_Internal_Sym sym
;
12996 sym
.st_value
= osi
->sec
->output_section
->vma
12997 + osi
->sec
->output_offset
12999 sym
.st_size
= size
;
13001 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
13002 sym
.st_shndx
= osi
->sec_shndx
;
13003 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
13007 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
13010 struct elf32_arm_stub_hash_entry
*stub_entry
;
13011 struct bfd_link_info
*info
;
13012 asection
*stub_sec
;
13015 output_arch_syminfo
*osi
;
13016 const insn_sequence
*template_sequence
;
13017 enum stub_insn_type prev_type
;
13020 enum map_symbol_type sym_type
;
13022 /* Massage our args to the form they really have. */
13023 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
13024 osi
= (output_arch_syminfo
*) in_arg
;
13028 stub_sec
= stub_entry
->stub_sec
;
13030 /* Ensure this stub is attached to the current section being
13032 if (stub_sec
!= osi
->sec
)
13035 addr
= (bfd_vma
) stub_entry
->stub_offset
;
13036 stub_name
= stub_entry
->output_name
;
13038 template_sequence
= stub_entry
->stub_template
;
13039 switch (template_sequence
[0].type
)
13042 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
, stub_entry
->stub_size
))
13047 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
13048 stub_entry
->stub_size
))
13056 prev_type
= DATA_TYPE
;
13058 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
13060 switch (template_sequence
[i
].type
)
13063 sym_type
= ARM_MAP_ARM
;
13068 sym_type
= ARM_MAP_THUMB
;
13072 sym_type
= ARM_MAP_DATA
;
13080 if (template_sequence
[i
].type
!= prev_type
)
13082 prev_type
= template_sequence
[i
].type
;
13083 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
13087 switch (template_sequence
[i
].type
)
13111 /* Output mapping symbols for linker generated sections,
13112 and for those data-only sections that do not have a
13116 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
13117 struct bfd_link_info
*info
,
13119 int (*func
) (void *, const char *,
13120 Elf_Internal_Sym
*,
13122 struct elf_link_hash_entry
*))
13124 output_arch_syminfo osi
;
13125 struct elf32_arm_link_hash_table
*htab
;
13127 bfd_size_type size
;
13130 htab
= elf32_arm_hash_table (info
);
13134 check_use_blx (htab
);
13140 /* Add a $d mapping symbol to data-only sections that
13141 don't have any mapping symbol. This may result in (harmless) redundant
13142 mapping symbols. */
13143 for (input_bfd
= info
->input_bfds
;
13145 input_bfd
= input_bfd
->link_next
)
13147 if ((input_bfd
->flags
& (BFD_LINKER_CREATED
| HAS_SYMS
)) == HAS_SYMS
)
13148 for (osi
.sec
= input_bfd
->sections
;
13150 osi
.sec
= osi
.sec
->next
)
13152 if (osi
.sec
->output_section
!= NULL
13153 && ((osi
.sec
->output_section
->flags
& (SEC_ALLOC
| SEC_CODE
))
13155 && (osi
.sec
->flags
& (SEC_HAS_CONTENTS
| SEC_LINKER_CREATED
))
13156 == SEC_HAS_CONTENTS
13157 && get_arm_elf_section_data (osi
.sec
) != NULL
13158 && get_arm_elf_section_data (osi
.sec
)->mapcount
== 0
13159 && osi
.sec
->size
> 0)
13161 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13162 (output_bfd
, osi
.sec
->output_section
);
13163 if (osi
.sec_shndx
!= (int)SHN_BAD
)
13164 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 0);
13169 /* ARM->Thumb glue. */
13170 if (htab
->arm_glue_size
> 0)
13172 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
13173 ARM2THUMB_GLUE_SECTION_NAME
);
13175 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13176 (output_bfd
, osi
.sec
->output_section
);
13177 if (info
->shared
|| htab
->root
.is_relocatable_executable
13178 || htab
->pic_veneer
)
13179 size
= ARM2THUMB_PIC_GLUE_SIZE
;
13180 else if (htab
->use_blx
)
13181 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
13183 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
13185 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
13187 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
13188 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
13192 /* Thumb->ARM glue. */
13193 if (htab
->thumb_glue_size
> 0)
13195 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
13196 THUMB2ARM_GLUE_SECTION_NAME
);
13198 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13199 (output_bfd
, osi
.sec
->output_section
);
13200 size
= THUMB2ARM_GLUE_SIZE
;
13202 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
13204 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
13205 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
13209 /* ARMv4 BX veneers. */
13210 if (htab
->bx_glue_size
> 0)
13212 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
13213 ARM_BX_GLUE_SECTION_NAME
);
13215 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13216 (output_bfd
, osi
.sec
->output_section
);
13218 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
13221 /* Long calls stubs. */
13222 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
13224 asection
* stub_sec
;
13226 for (stub_sec
= htab
->stub_bfd
->sections
;
13228 stub_sec
= stub_sec
->next
)
13230 /* Ignore non-stub sections. */
13231 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
13234 osi
.sec
= stub_sec
;
13236 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13237 (output_bfd
, osi
.sec
->output_section
);
13239 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
13243 /* Finally, output mapping symbols for the PLT. */
13244 if (!htab
->splt
|| htab
->splt
->size
== 0)
13247 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
13248 htab
->splt
->output_section
);
13249 osi
.sec
= htab
->splt
;
13250 /* Output mapping symbols for the plt header. SymbianOS does not have a
13252 if (htab
->vxworks_p
)
13254 /* VxWorks shared libraries have no PLT header. */
13257 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
13259 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
13263 else if (!htab
->symbian_p
)
13265 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
13267 #ifndef FOUR_WORD_PLT
13268 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
13273 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, (void *) &osi
);
13277 /* Allocate target specific section data. */
13280 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
13282 if (!sec
->used_by_bfd
)
13284 _arm_elf_section_data
*sdata
;
13285 bfd_size_type amt
= sizeof (*sdata
);
13287 sdata
= (_arm_elf_section_data
*) bfd_zalloc (abfd
, amt
);
13290 sec
->used_by_bfd
= sdata
;
13293 return _bfd_elf_new_section_hook (abfd
, sec
);
13297 /* Used to order a list of mapping symbols by address. */
13300 elf32_arm_compare_mapping (const void * a
, const void * b
)
13302 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
13303 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
13305 if (amap
->vma
> bmap
->vma
)
13307 else if (amap
->vma
< bmap
->vma
)
13309 else if (amap
->type
> bmap
->type
)
13310 /* Ensure results do not depend on the host qsort for objects with
13311 multiple mapping symbols at the same address by sorting on type
13314 else if (amap
->type
< bmap
->type
)
13320 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
13322 static unsigned long
13323 offset_prel31 (unsigned long addr
, bfd_vma offset
)
13325 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
13328 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
13332 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
13334 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
13335 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
13337 /* High bit of first word is supposed to be zero. */
13338 if ((first_word
& 0x80000000ul
) == 0)
13339 first_word
= offset_prel31 (first_word
, offset
);
13341 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
13342 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
13343 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
13344 second_word
= offset_prel31 (second_word
, offset
);
13346 bfd_put_32 (output_bfd
, first_word
, to
);
13347 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
13350 /* Data for make_branch_to_a8_stub(). */
13352 struct a8_branch_to_stub_data
{
13353 asection
*writing_section
;
13354 bfd_byte
*contents
;
13358 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
13359 places for a particular section. */
13362 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
13365 struct elf32_arm_stub_hash_entry
*stub_entry
;
13366 struct a8_branch_to_stub_data
*data
;
13367 bfd_byte
*contents
;
13368 unsigned long branch_insn
;
13369 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
13370 bfd_signed_vma branch_offset
;
13372 unsigned int target
;
13374 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
13375 data
= (struct a8_branch_to_stub_data
*) in_arg
;
13377 if (stub_entry
->target_section
!= data
->writing_section
13378 || stub_entry
->stub_type
< arm_stub_a8_veneer_b_cond
)
13381 contents
= data
->contents
;
13383 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
13384 + stub_entry
->target_section
->output_offset
13385 + stub_entry
->target_value
;
13387 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
13388 + stub_entry
->stub_sec
->output_offset
13389 + stub_entry
->stub_offset
;
13391 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
13392 veneered_insn_loc
&= ~3u;
13394 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
13396 abfd
= stub_entry
->target_section
->owner
;
13397 target
= stub_entry
->target_value
;
13399 /* We attempt to avoid this condition by setting stubs_always_after_branch
13400 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
13401 This check is just to be on the safe side... */
13402 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
13404 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub is "
13405 "allocated in unsafe location"), abfd
);
13409 switch (stub_entry
->stub_type
)
13411 case arm_stub_a8_veneer_b
:
13412 case arm_stub_a8_veneer_b_cond
:
13413 branch_insn
= 0xf0009000;
13416 case arm_stub_a8_veneer_blx
:
13417 branch_insn
= 0xf000e800;
13420 case arm_stub_a8_veneer_bl
:
13422 unsigned int i1
, j1
, i2
, j2
, s
;
13424 branch_insn
= 0xf000d000;
13427 if (branch_offset
< -16777216 || branch_offset
> 16777214)
13429 /* There's not much we can do apart from complain if this
13431 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub out "
13432 "of range (input file too large)"), abfd
);
13436 /* i1 = not(j1 eor s), so:
13438 j1 = (not i1) eor s. */
13440 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
13441 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
13442 i2
= (branch_offset
>> 22) & 1;
13443 i1
= (branch_offset
>> 23) & 1;
13444 s
= (branch_offset
>> 24) & 1;
13447 branch_insn
|= j2
<< 11;
13448 branch_insn
|= j1
<< 13;
13449 branch_insn
|= s
<< 26;
13458 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[target
]);
13459 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[target
+ 2]);
13464 /* Do code byteswapping. Return FALSE afterwards so that the section is
13465 written out as normal. */
13468 elf32_arm_write_section (bfd
*output_bfd
,
13469 struct bfd_link_info
*link_info
,
13471 bfd_byte
*contents
)
13473 unsigned int mapcount
, errcount
;
13474 _arm_elf_section_data
*arm_data
;
13475 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
13476 elf32_arm_section_map
*map
;
13477 elf32_vfp11_erratum_list
*errnode
;
13480 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
13484 if (globals
== NULL
)
13487 /* If this section has not been allocated an _arm_elf_section_data
13488 structure then we cannot record anything. */
13489 arm_data
= get_arm_elf_section_data (sec
);
13490 if (arm_data
== NULL
)
13493 mapcount
= arm_data
->mapcount
;
13494 map
= arm_data
->map
;
13495 errcount
= arm_data
->erratumcount
;
13499 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
13501 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
13502 errnode
= errnode
->next
)
13504 bfd_vma target
= errnode
->vma
- offset
;
13506 switch (errnode
->type
)
13508 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
13510 bfd_vma branch_to_veneer
;
13511 /* Original condition code of instruction, plus bit mask for
13512 ARM B instruction. */
13513 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
13516 /* The instruction is before the label. */
13519 /* Above offset included in -4 below. */
13520 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
13521 - errnode
->vma
- 4;
13523 if ((signed) branch_to_veneer
< -(1 << 25)
13524 || (signed) branch_to_veneer
>= (1 << 25))
13525 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
13526 "range"), output_bfd
);
13528 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
13529 contents
[endianflip
^ target
] = insn
& 0xff;
13530 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
13531 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
13532 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
13536 case VFP11_ERRATUM_ARM_VENEER
:
13538 bfd_vma branch_from_veneer
;
13541 /* Take size of veneer into account. */
13542 branch_from_veneer
= errnode
->u
.v
.branch
->vma
13543 - errnode
->vma
- 12;
13545 if ((signed) branch_from_veneer
< -(1 << 25)
13546 || (signed) branch_from_veneer
>= (1 << 25))
13547 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
13548 "range"), output_bfd
);
13550 /* Original instruction. */
13551 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
13552 contents
[endianflip
^ target
] = insn
& 0xff;
13553 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
13554 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
13555 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
13557 /* Branch back to insn after original insn. */
13558 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
13559 contents
[endianflip
^ (target
+ 4)] = insn
& 0xff;
13560 contents
[endianflip
^ (target
+ 5)] = (insn
>> 8) & 0xff;
13561 contents
[endianflip
^ (target
+ 6)] = (insn
>> 16) & 0xff;
13562 contents
[endianflip
^ (target
+ 7)] = (insn
>> 24) & 0xff;
13572 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
13574 arm_unwind_table_edit
*edit_node
13575 = arm_data
->u
.exidx
.unwind_edit_list
;
13576 /* Now, sec->size is the size of the section we will write. The original
13577 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
13578 markers) was sec->rawsize. (This isn't the case if we perform no
13579 edits, then rawsize will be zero and we should use size). */
13580 bfd_byte
*edited_contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
13581 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
13582 unsigned int in_index
, out_index
;
13583 bfd_vma add_to_offsets
= 0;
13585 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
13589 unsigned int edit_index
= edit_node
->index
;
13591 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
13593 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
13594 contents
+ in_index
* 8, add_to_offsets
);
13598 else if (in_index
== edit_index
13599 || (in_index
* 8 >= input_size
13600 && edit_index
== UINT_MAX
))
13602 switch (edit_node
->type
)
13604 case DELETE_EXIDX_ENTRY
:
13606 add_to_offsets
+= 8;
13609 case INSERT_EXIDX_CANTUNWIND_AT_END
:
13611 asection
*text_sec
= edit_node
->linked_section
;
13612 bfd_vma text_offset
= text_sec
->output_section
->vma
13613 + text_sec
->output_offset
13615 bfd_vma exidx_offset
= offset
+ out_index
* 8;
13616 unsigned long prel31_offset
;
13618 /* Note: this is meant to be equivalent to an
13619 R_ARM_PREL31 relocation. These synthetic
13620 EXIDX_CANTUNWIND markers are not relocated by the
13621 usual BFD method. */
13622 prel31_offset
= (text_offset
- exidx_offset
)
13625 /* First address we can't unwind. */
13626 bfd_put_32 (output_bfd
, prel31_offset
,
13627 &edited_contents
[out_index
* 8]);
13629 /* Code for EXIDX_CANTUNWIND. */
13630 bfd_put_32 (output_bfd
, 0x1,
13631 &edited_contents
[out_index
* 8 + 4]);
13634 add_to_offsets
-= 8;
13639 edit_node
= edit_node
->next
;
13644 /* No more edits, copy remaining entries verbatim. */
13645 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
13646 contents
+ in_index
* 8, add_to_offsets
);
13652 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
13653 bfd_set_section_contents (output_bfd
, sec
->output_section
,
13655 (file_ptr
) sec
->output_offset
, sec
->size
);
13660 /* Fix code to point to Cortex-A8 erratum stubs. */
13661 if (globals
->fix_cortex_a8
)
13663 struct a8_branch_to_stub_data data
;
13665 data
.writing_section
= sec
;
13666 data
.contents
= contents
;
13668 bfd_hash_traverse (&globals
->stub_hash_table
, make_branch_to_a8_stub
,
13675 if (globals
->byteswap_code
)
13677 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
13680 for (i
= 0; i
< mapcount
; i
++)
13682 if (i
== mapcount
- 1)
13685 end
= map
[i
+ 1].vma
;
13687 switch (map
[i
].type
)
13690 /* Byte swap code words. */
13691 while (ptr
+ 3 < end
)
13693 tmp
= contents
[ptr
];
13694 contents
[ptr
] = contents
[ptr
+ 3];
13695 contents
[ptr
+ 3] = tmp
;
13696 tmp
= contents
[ptr
+ 1];
13697 contents
[ptr
+ 1] = contents
[ptr
+ 2];
13698 contents
[ptr
+ 2] = tmp
;
13704 /* Byte swap code halfwords. */
13705 while (ptr
+ 1 < end
)
13707 tmp
= contents
[ptr
];
13708 contents
[ptr
] = contents
[ptr
+ 1];
13709 contents
[ptr
+ 1] = tmp
;
13715 /* Leave data alone. */
13723 arm_data
->mapcount
= -1;
13724 arm_data
->mapsize
= 0;
13725 arm_data
->map
= NULL
;
13730 /* Display STT_ARM_TFUNC symbols as functions. */
13733 elf32_arm_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
13736 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
13738 if (ELF_ST_TYPE (elfsym
->internal_elf_sym
.st_info
) == STT_ARM_TFUNC
)
13739 elfsym
->symbol
.flags
|= BSF_FUNCTION
;
13743 /* Mangle thumb function symbols as we read them in. */
13746 elf32_arm_swap_symbol_in (bfd
* abfd
,
13749 Elf_Internal_Sym
*dst
)
13751 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
13754 /* New EABI objects mark thumb function symbols by setting the low bit of
13755 the address. Turn these into STT_ARM_TFUNC. */
13756 if ((ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
)
13757 && (dst
->st_value
& 1))
13759 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_ARM_TFUNC
);
13760 dst
->st_value
&= ~(bfd_vma
) 1;
13766 /* Mangle thumb function symbols as we write them out. */
13769 elf32_arm_swap_symbol_out (bfd
*abfd
,
13770 const Elf_Internal_Sym
*src
,
13774 Elf_Internal_Sym newsym
;
13776 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
13777 of the address set, as per the new EABI. We do this unconditionally
13778 because objcopy does not set the elf header flags until after
13779 it writes out the symbol table. */
13780 if (ELF_ST_TYPE (src
->st_info
) == STT_ARM_TFUNC
)
13783 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
13784 if (newsym
.st_shndx
!= SHN_UNDEF
)
13786 /* Do this only for defined symbols. At link type, the static
13787 linker will simulate the work of dynamic linker of resolving
13788 symbols and will carry over the thumbness of found symbols to
13789 the output symbol table. It's not clear how it happens, but
13790 the thumbness of undefined symbols can well be different at
13791 runtime, and writing '1' for them will be confusing for users
13792 and possibly for dynamic linker itself.
13794 newsym
.st_value
|= 1;
13799 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
13802 /* Add the PT_ARM_EXIDX program header. */
13805 elf32_arm_modify_segment_map (bfd
*abfd
,
13806 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
13808 struct elf_segment_map
*m
;
13811 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
13812 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
13814 /* If there is already a PT_ARM_EXIDX header, then we do not
13815 want to add another one. This situation arises when running
13816 "strip"; the input binary already has the header. */
13817 m
= elf_tdata (abfd
)->segment_map
;
13818 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
13822 m
= (struct elf_segment_map
*)
13823 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
13826 m
->p_type
= PT_ARM_EXIDX
;
13828 m
->sections
[0] = sec
;
13830 m
->next
= elf_tdata (abfd
)->segment_map
;
13831 elf_tdata (abfd
)->segment_map
= m
;
13838 /* We may add a PT_ARM_EXIDX program header. */
13841 elf32_arm_additional_program_headers (bfd
*abfd
,
13842 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
13846 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
13847 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
13853 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
13856 elf32_arm_is_function_type (unsigned int type
)
13858 return (type
== STT_FUNC
) || (type
== STT_ARM_TFUNC
);
13861 /* We use this to override swap_symbol_in and swap_symbol_out. */
13862 const struct elf_size_info elf32_arm_size_info
=
13864 sizeof (Elf32_External_Ehdr
),
13865 sizeof (Elf32_External_Phdr
),
13866 sizeof (Elf32_External_Shdr
),
13867 sizeof (Elf32_External_Rel
),
13868 sizeof (Elf32_External_Rela
),
13869 sizeof (Elf32_External_Sym
),
13870 sizeof (Elf32_External_Dyn
),
13871 sizeof (Elf_External_Note
),
13875 ELFCLASS32
, EV_CURRENT
,
13876 bfd_elf32_write_out_phdrs
,
13877 bfd_elf32_write_shdrs_and_ehdr
,
13878 bfd_elf32_checksum_contents
,
13879 bfd_elf32_write_relocs
,
13880 elf32_arm_swap_symbol_in
,
13881 elf32_arm_swap_symbol_out
,
13882 bfd_elf32_slurp_reloc_table
,
13883 bfd_elf32_slurp_symbol_table
,
13884 bfd_elf32_swap_dyn_in
,
13885 bfd_elf32_swap_dyn_out
,
13886 bfd_elf32_swap_reloc_in
,
13887 bfd_elf32_swap_reloc_out
,
13888 bfd_elf32_swap_reloca_in
,
13889 bfd_elf32_swap_reloca_out
13892 #define ELF_ARCH bfd_arch_arm
13893 #define ELF_MACHINE_CODE EM_ARM
13894 #ifdef __QNXTARGET__
13895 #define ELF_MAXPAGESIZE 0x1000
13897 #define ELF_MAXPAGESIZE 0x8000
13899 #define ELF_MINPAGESIZE 0x1000
13900 #define ELF_COMMONPAGESIZE 0x1000
13902 #define bfd_elf32_mkobject elf32_arm_mkobject
13904 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
13905 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
13906 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
13907 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
13908 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
13909 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
13910 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
13911 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
13912 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
13913 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
13914 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
13915 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
13916 #define bfd_elf32_bfd_final_link elf32_arm_final_link
13918 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
13919 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
13920 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
13921 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
13922 #define elf_backend_check_relocs elf32_arm_check_relocs
13923 #define elf_backend_relocate_section elf32_arm_relocate_section
13924 #define elf_backend_write_section elf32_arm_write_section
13925 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
13926 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
13927 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
13928 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
13929 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
13930 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
13931 #define elf_backend_post_process_headers elf32_arm_post_process_headers
13932 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
13933 #define elf_backend_object_p elf32_arm_object_p
13934 #define elf_backend_section_flags elf32_arm_section_flags
13935 #define elf_backend_fake_sections elf32_arm_fake_sections
13936 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
13937 #define elf_backend_final_write_processing elf32_arm_final_write_processing
13938 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
13939 #define elf_backend_symbol_processing elf32_arm_symbol_processing
13940 #define elf_backend_size_info elf32_arm_size_info
13941 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
13942 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
13943 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
13944 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
13945 #define elf_backend_is_function_type elf32_arm_is_function_type
13947 #define elf_backend_can_refcount 1
13948 #define elf_backend_can_gc_sections 1
13949 #define elf_backend_plt_readonly 1
13950 #define elf_backend_want_got_plt 1
13951 #define elf_backend_want_plt_sym 0
13952 #define elf_backend_may_use_rel_p 1
13953 #define elf_backend_may_use_rela_p 0
13954 #define elf_backend_default_use_rela_p 0
13956 #define elf_backend_got_header_size 12
13958 #undef elf_backend_obj_attrs_vendor
13959 #define elf_backend_obj_attrs_vendor "aeabi"
13960 #undef elf_backend_obj_attrs_section
13961 #define elf_backend_obj_attrs_section ".ARM.attributes"
13962 #undef elf_backend_obj_attrs_arg_type
13963 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
13964 #undef elf_backend_obj_attrs_section_type
13965 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
13966 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
13968 #include "elf32-target.h"
13970 /* VxWorks Targets. */
13972 #undef TARGET_LITTLE_SYM
13973 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
13974 #undef TARGET_LITTLE_NAME
13975 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
13976 #undef TARGET_BIG_SYM
13977 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
13978 #undef TARGET_BIG_NAME
13979 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
13981 /* Like elf32_arm_link_hash_table_create -- but overrides
13982 appropriately for VxWorks. */
13984 static struct bfd_link_hash_table
*
13985 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
13987 struct bfd_link_hash_table
*ret
;
13989 ret
= elf32_arm_link_hash_table_create (abfd
);
13992 struct elf32_arm_link_hash_table
*htab
13993 = (struct elf32_arm_link_hash_table
*) ret
;
13995 htab
->vxworks_p
= 1;
14001 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
14003 elf32_arm_final_write_processing (abfd
, linker
);
14004 elf_vxworks_final_write_processing (abfd
, linker
);
14008 #define elf32_bed elf32_arm_vxworks_bed
14010 #undef bfd_elf32_bfd_link_hash_table_create
14011 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
14012 #undef elf_backend_add_symbol_hook
14013 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
14014 #undef elf_backend_final_write_processing
14015 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
14016 #undef elf_backend_emit_relocs
14017 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
14019 #undef elf_backend_may_use_rel_p
14020 #define elf_backend_may_use_rel_p 0
14021 #undef elf_backend_may_use_rela_p
14022 #define elf_backend_may_use_rela_p 1
14023 #undef elf_backend_default_use_rela_p
14024 #define elf_backend_default_use_rela_p 1
14025 #undef elf_backend_want_plt_sym
14026 #define elf_backend_want_plt_sym 1
14027 #undef ELF_MAXPAGESIZE
14028 #define ELF_MAXPAGESIZE 0x1000
14030 #include "elf32-target.h"
14033 /* Merge backend specific data from an object file to the output
14034 object file when linking. */
14037 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
14039 flagword out_flags
;
14041 bfd_boolean flags_compatible
= TRUE
;
14044 /* Check if we have the same endianess. */
14045 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
14048 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
14051 if (!elf32_arm_merge_eabi_attributes (ibfd
, obfd
))
14054 /* The input BFD must have had its flags initialised. */
14055 /* The following seems bogus to me -- The flags are initialized in
14056 the assembler but I don't think an elf_flags_init field is
14057 written into the object. */
14058 /* BFD_ASSERT (elf_flags_init (ibfd)); */
14060 in_flags
= elf_elfheader (ibfd
)->e_flags
;
14061 out_flags
= elf_elfheader (obfd
)->e_flags
;
14063 /* In theory there is no reason why we couldn't handle this. However
14064 in practice it isn't even close to working and there is no real
14065 reason to want it. */
14066 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
14067 && !(ibfd
->flags
& DYNAMIC
)
14068 && (in_flags
& EF_ARM_BE8
))
14070 _bfd_error_handler (_("error: %B is already in final BE8 format"),
14075 if (!elf_flags_init (obfd
))
14077 /* If the input is the default architecture and had the default
14078 flags then do not bother setting the flags for the output
14079 architecture, instead allow future merges to do this. If no
14080 future merges ever set these flags then they will retain their
14081 uninitialised values, which surprise surprise, correspond
14082 to the default values. */
14083 if (bfd_get_arch_info (ibfd
)->the_default
14084 && elf_elfheader (ibfd
)->e_flags
== 0)
14087 elf_flags_init (obfd
) = TRUE
;
14088 elf_elfheader (obfd
)->e_flags
= in_flags
;
14090 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
14091 && bfd_get_arch_info (obfd
)->the_default
)
14092 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
14097 /* Determine what should happen if the input ARM architecture
14098 does not match the output ARM architecture. */
14099 if (! bfd_arm_merge_machines (ibfd
, obfd
))
14102 /* Identical flags must be compatible. */
14103 if (in_flags
== out_flags
)
14106 /* Check to see if the input BFD actually contains any sections. If
14107 not, its flags may not have been initialised either, but it
14108 cannot actually cause any incompatiblity. Do not short-circuit
14109 dynamic objects; their section list may be emptied by
14110 elf_link_add_object_symbols.
14112 Also check to see if there are no code sections in the input.
14113 In this case there is no need to check for code specific flags.
14114 XXX - do we need to worry about floating-point format compatability
14115 in data sections ? */
14116 if (!(ibfd
->flags
& DYNAMIC
))
14118 bfd_boolean null_input_bfd
= TRUE
;
14119 bfd_boolean only_data_sections
= TRUE
;
14121 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
14123 /* Ignore synthetic glue sections. */
14124 if (strcmp (sec
->name
, ".glue_7")
14125 && strcmp (sec
->name
, ".glue_7t"))
14127 if ((bfd_get_section_flags (ibfd
, sec
)
14128 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
14129 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
14130 only_data_sections
= FALSE
;
14132 null_input_bfd
= FALSE
;
14137 if (null_input_bfd
|| only_data_sections
)
14141 /* Complain about various flag mismatches. */
14142 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
14143 EF_ARM_EABI_VERSION (out_flags
)))
14146 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
14148 (in_flags
& EF_ARM_EABIMASK
) >> 24,
14149 (out_flags
& EF_ARM_EABIMASK
) >> 24);
14153 /* Not sure what needs to be checked for EABI versions >= 1. */
14154 /* VxWorks libraries do not use these flags. */
14155 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
14156 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
14157 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
14159 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
14162 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
14164 in_flags
& EF_ARM_APCS_26
? 26 : 32,
14165 out_flags
& EF_ARM_APCS_26
? 26 : 32);
14166 flags_compatible
= FALSE
;
14169 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
14171 if (in_flags
& EF_ARM_APCS_FLOAT
)
14173 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
14177 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
14180 flags_compatible
= FALSE
;
14183 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
14185 if (in_flags
& EF_ARM_VFP_FLOAT
)
14187 (_("error: %B uses VFP instructions, whereas %B does not"),
14191 (_("error: %B uses FPA instructions, whereas %B does not"),
14194 flags_compatible
= FALSE
;
14197 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
14199 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
14201 (_("error: %B uses Maverick instructions, whereas %B does not"),
14205 (_("error: %B does not use Maverick instructions, whereas %B does"),
14208 flags_compatible
= FALSE
;
14211 #ifdef EF_ARM_SOFT_FLOAT
14212 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
14214 /* We can allow interworking between code that is VFP format
14215 layout, and uses either soft float or integer regs for
14216 passing floating point arguments and results. We already
14217 know that the APCS_FLOAT flags match; similarly for VFP
14219 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
14220 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
14222 if (in_flags
& EF_ARM_SOFT_FLOAT
)
14224 (_("error: %B uses software FP, whereas %B uses hardware FP"),
14228 (_("error: %B uses hardware FP, whereas %B uses software FP"),
14231 flags_compatible
= FALSE
;
14236 /* Interworking mismatch is only a warning. */
14237 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
14239 if (in_flags
& EF_ARM_INTERWORK
)
14242 (_("Warning: %B supports interworking, whereas %B does not"),
14248 (_("Warning: %B does not support interworking, whereas %B does"),
14254 return flags_compatible
;
14258 /* Symbian OS Targets. */
14260 #undef TARGET_LITTLE_SYM
14261 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
14262 #undef TARGET_LITTLE_NAME
14263 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
14264 #undef TARGET_BIG_SYM
14265 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
14266 #undef TARGET_BIG_NAME
14267 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
14269 /* Like elf32_arm_link_hash_table_create -- but overrides
14270 appropriately for Symbian OS. */
14272 static struct bfd_link_hash_table
*
14273 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
14275 struct bfd_link_hash_table
*ret
;
14277 ret
= elf32_arm_link_hash_table_create (abfd
);
14280 struct elf32_arm_link_hash_table
*htab
14281 = (struct elf32_arm_link_hash_table
*)ret
;
14282 /* There is no PLT header for Symbian OS. */
14283 htab
->plt_header_size
= 0;
14284 /* The PLT entries are each one instruction and one word. */
14285 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
14286 htab
->symbian_p
= 1;
14287 /* Symbian uses armv5t or above, so use_blx is always true. */
14289 htab
->root
.is_relocatable_executable
= 1;
14294 static const struct bfd_elf_special_section
14295 elf32_arm_symbian_special_sections
[] =
14297 /* In a BPABI executable, the dynamic linking sections do not go in
14298 the loadable read-only segment. The post-linker may wish to
14299 refer to these sections, but they are not part of the final
14301 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
14302 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
14303 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
14304 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
14305 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
14306 /* These sections do not need to be writable as the SymbianOS
14307 postlinker will arrange things so that no dynamic relocation is
14309 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
14310 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
14311 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
14312 { NULL
, 0, 0, 0, 0 }
14316 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
14317 struct bfd_link_info
*link_info
)
14319 /* BPABI objects are never loaded directly by an OS kernel; they are
14320 processed by a postlinker first, into an OS-specific format. If
14321 the D_PAGED bit is set on the file, BFD will align segments on
14322 page boundaries, so that an OS can directly map the file. With
14323 BPABI objects, that just results in wasted space. In addition,
14324 because we clear the D_PAGED bit, map_sections_to_segments will
14325 recognize that the program headers should not be mapped into any
14326 loadable segment. */
14327 abfd
->flags
&= ~D_PAGED
;
14328 elf32_arm_begin_write_processing (abfd
, link_info
);
14332 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
14333 struct bfd_link_info
*info
)
14335 struct elf_segment_map
*m
;
14338 /* BPABI shared libraries and executables should have a PT_DYNAMIC
14339 segment. However, because the .dynamic section is not marked
14340 with SEC_LOAD, the generic ELF code will not create such a
14342 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
14345 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
14346 if (m
->p_type
== PT_DYNAMIC
)
14351 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
14352 m
->next
= elf_tdata (abfd
)->segment_map
;
14353 elf_tdata (abfd
)->segment_map
= m
;
14357 /* Also call the generic arm routine. */
14358 return elf32_arm_modify_segment_map (abfd
, info
);
14361 /* Return address for Ith PLT stub in section PLT, for relocation REL
14362 or (bfd_vma) -1 if it should not be included. */
14365 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
14366 const arelent
*rel ATTRIBUTE_UNUSED
)
14368 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
14373 #define elf32_bed elf32_arm_symbian_bed
14375 /* The dynamic sections are not allocated on SymbianOS; the postlinker
14376 will process them and then discard them. */
14377 #undef ELF_DYNAMIC_SEC_FLAGS
14378 #define ELF_DYNAMIC_SEC_FLAGS \
14379 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
14381 #undef elf_backend_add_symbol_hook
14382 #undef elf_backend_emit_relocs
14384 #undef bfd_elf32_bfd_link_hash_table_create
14385 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
14386 #undef elf_backend_special_sections
14387 #define elf_backend_special_sections elf32_arm_symbian_special_sections
14388 #undef elf_backend_begin_write_processing
14389 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
14390 #undef elf_backend_final_write_processing
14391 #define elf_backend_final_write_processing elf32_arm_final_write_processing
14393 #undef elf_backend_modify_segment_map
14394 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
14396 /* There is no .got section for BPABI objects, and hence no header. */
14397 #undef elf_backend_got_header_size
14398 #define elf_backend_got_header_size 0
14400 /* Similarly, there is no .got.plt section. */
14401 #undef elf_backend_want_got_plt
14402 #define elf_backend_want_got_plt 0
14404 #undef elf_backend_plt_sym_val
14405 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
14407 #undef elf_backend_may_use_rel_p
14408 #define elf_backend_may_use_rel_p 1
14409 #undef elf_backend_may_use_rela_p
14410 #define elf_backend_may_use_rela_p 0
14411 #undef elf_backend_default_use_rela_p
14412 #define elf_backend_default_use_rela_p 0
14413 #undef elf_backend_want_plt_sym
14414 #define elf_backend_want_plt_sym 0
14415 #undef ELF_MAXPAGESIZE
14416 #define ELF_MAXPAGESIZE 0x8000
14418 #include "elf32-target.h"