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 unsigned int r_type
;
2413 unsigned char st_type
;
2414 const char *sym_name
;
2415 bfd_boolean non_a8_stub
;
2418 /* The size of the thread control block. */
2421 struct elf_arm_obj_tdata
2423 struct elf_obj_tdata root
;
2425 /* tls_type for each local got entry. */
2426 char *local_got_tls_type
;
2428 /* Zero to warn when linking objects with incompatible enum sizes. */
2429 int no_enum_size_warning
;
2431 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2432 int no_wchar_size_warning
;
2435 #define elf_arm_tdata(bfd) \
2436 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2438 #define elf32_arm_local_got_tls_type(bfd) \
2439 (elf_arm_tdata (bfd)->local_got_tls_type)
2441 #define is_arm_elf(bfd) \
2442 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2443 && elf_tdata (bfd) != NULL \
2444 && elf_object_id (bfd) == ARM_ELF_DATA)
2447 elf32_arm_mkobject (bfd
*abfd
)
2449 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2453 /* The ARM linker needs to keep track of the number of relocs that it
2454 decides to copy in check_relocs for each symbol. This is so that
2455 it can discard PC relative relocs if it doesn't need them when
2456 linking with -Bsymbolic. We store the information in a field
2457 extending the regular ELF linker hash table. */
2459 /* This structure keeps track of the number of relocs we have copied
2460 for a given symbol. */
2461 struct elf32_arm_relocs_copied
2464 struct elf32_arm_relocs_copied
* next
;
2465 /* A section in dynobj. */
2467 /* Number of relocs copied in this section. */
2468 bfd_size_type count
;
2469 /* Number of PC-relative relocs copied in this section. */
2470 bfd_size_type pc_count
;
2473 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2475 /* Arm ELF linker hash entry. */
2476 struct elf32_arm_link_hash_entry
2478 struct elf_link_hash_entry root
;
2480 /* Number of PC relative relocs copied for this symbol. */
2481 struct elf32_arm_relocs_copied
* relocs_copied
;
2483 /* We reference count Thumb references to a PLT entry separately,
2484 so that we can emit the Thumb trampoline only if needed. */
2485 bfd_signed_vma plt_thumb_refcount
;
2487 /* Some references from Thumb code may be eliminated by BL->BLX
2488 conversion, so record them separately. */
2489 bfd_signed_vma plt_maybe_thumb_refcount
;
2491 /* Since PLT entries have variable size if the Thumb prologue is
2492 used, we need to record the index into .got.plt instead of
2493 recomputing it from the PLT offset. */
2494 bfd_signed_vma plt_got_offset
;
2496 #define GOT_UNKNOWN 0
2497 #define GOT_NORMAL 1
2498 #define GOT_TLS_GD 2
2499 #define GOT_TLS_IE 4
2500 unsigned char tls_type
;
2502 /* The symbol marking the real symbol location for exported thumb
2503 symbols with Arm stubs. */
2504 struct elf_link_hash_entry
*export_glue
;
2506 /* A pointer to the most recently used stub hash entry against this
2508 struct elf32_arm_stub_hash_entry
*stub_cache
;
2511 /* Traverse an arm ELF linker hash table. */
2512 #define elf32_arm_link_hash_traverse(table, func, info) \
2513 (elf_link_hash_traverse \
2515 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2518 /* Get the ARM elf linker hash table from a link_info structure. */
2519 #define elf32_arm_hash_table(info) \
2520 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2521 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2523 #define arm_stub_hash_lookup(table, string, create, copy) \
2524 ((struct elf32_arm_stub_hash_entry *) \
2525 bfd_hash_lookup ((table), (string), (create), (copy)))
2527 /* Array to keep track of which stub sections have been created, and
2528 information on stub grouping. */
2531 /* This is the section to which stubs in the group will be
2534 /* The stub section. */
2538 /* ARM ELF linker hash table. */
2539 struct elf32_arm_link_hash_table
2541 /* The main hash table. */
2542 struct elf_link_hash_table root
;
2544 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2545 bfd_size_type thumb_glue_size
;
2547 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2548 bfd_size_type arm_glue_size
;
2550 /* The size in bytes of section containing the ARMv4 BX veneers. */
2551 bfd_size_type bx_glue_size
;
2553 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2554 veneer has been populated. */
2555 bfd_vma bx_glue_offset
[15];
2557 /* The size in bytes of the section containing glue for VFP11 erratum
2559 bfd_size_type vfp11_erratum_glue_size
;
2561 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2562 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2563 elf32_arm_write_section(). */
2564 struct a8_erratum_fix
*a8_erratum_fixes
;
2565 unsigned int num_a8_erratum_fixes
;
2567 /* An arbitrary input BFD chosen to hold the glue sections. */
2568 bfd
* bfd_of_glue_owner
;
2570 /* Nonzero to output a BE8 image. */
2573 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2574 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2577 /* The relocation to use for R_ARM_TARGET2 relocations. */
2580 /* 0 = Ignore R_ARM_V4BX.
2581 1 = Convert BX to MOV PC.
2582 2 = Generate v4 interworing stubs. */
2585 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2588 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2591 /* What sort of code sequences we should look for which may trigger the
2592 VFP11 denorm erratum. */
2593 bfd_arm_vfp11_fix vfp11_fix
;
2595 /* Global counter for the number of fixes we have emitted. */
2596 int num_vfp11_fixes
;
2598 /* Nonzero to force PIC branch veneers. */
2601 /* The number of bytes in the initial entry in the PLT. */
2602 bfd_size_type plt_header_size
;
2604 /* The number of bytes in the subsequent PLT etries. */
2605 bfd_size_type plt_entry_size
;
2607 /* True if the target system is VxWorks. */
2610 /* True if the target system is Symbian OS. */
2613 /* True if the target uses REL relocations. */
2616 /* Short-cuts to get to dynamic linker sections. */
2625 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2628 /* Data for R_ARM_TLS_LDM32 relocations. */
2631 bfd_signed_vma refcount
;
2635 /* Small local sym cache. */
2636 struct sym_cache sym_cache
;
2638 /* For convenience in allocate_dynrelocs. */
2641 /* The stub hash table. */
2642 struct bfd_hash_table stub_hash_table
;
2644 /* Linker stub bfd. */
2647 /* Linker call-backs. */
2648 asection
* (*add_stub_section
) (const char *, asection
*);
2649 void (*layout_sections_again
) (void);
2651 /* Array to keep track of which stub sections have been created, and
2652 information on stub grouping. */
2653 struct map_stub
*stub_group
;
2655 /* Number of elements in stub_group. */
2658 /* Assorted information used by elf32_arm_size_stubs. */
2659 unsigned int bfd_count
;
2661 asection
**input_list
;
2664 /* Create an entry in an ARM ELF linker hash table. */
2666 static struct bfd_hash_entry
*
2667 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
2668 struct bfd_hash_table
* table
,
2669 const char * string
)
2671 struct elf32_arm_link_hash_entry
* ret
=
2672 (struct elf32_arm_link_hash_entry
*) entry
;
2674 /* Allocate the structure if it has not already been allocated by a
2677 ret
= (struct elf32_arm_link_hash_entry
*)
2678 bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
2680 return (struct bfd_hash_entry
*) ret
;
2682 /* Call the allocation method of the superclass. */
2683 ret
= ((struct elf32_arm_link_hash_entry
*)
2684 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2688 ret
->relocs_copied
= NULL
;
2689 ret
->tls_type
= GOT_UNKNOWN
;
2690 ret
->plt_thumb_refcount
= 0;
2691 ret
->plt_maybe_thumb_refcount
= 0;
2692 ret
->plt_got_offset
= -1;
2693 ret
->export_glue
= NULL
;
2695 ret
->stub_cache
= NULL
;
2698 return (struct bfd_hash_entry
*) ret
;
2701 /* Initialize an entry in the stub hash table. */
2703 static struct bfd_hash_entry
*
2704 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2705 struct bfd_hash_table
*table
,
2708 /* Allocate the structure if it has not already been allocated by a
2712 entry
= (struct bfd_hash_entry
*)
2713 bfd_hash_allocate (table
, sizeof (struct elf32_arm_stub_hash_entry
));
2718 /* Call the allocation method of the superclass. */
2719 entry
= bfd_hash_newfunc (entry
, table
, string
);
2722 struct elf32_arm_stub_hash_entry
*eh
;
2724 /* Initialize the local fields. */
2725 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
2726 eh
->stub_sec
= NULL
;
2727 eh
->stub_offset
= 0;
2728 eh
->target_value
= 0;
2729 eh
->target_section
= NULL
;
2730 eh
->target_addend
= 0;
2732 eh
->stub_type
= arm_stub_none
;
2734 eh
->stub_template
= NULL
;
2735 eh
->stub_template_size
= 0;
2738 eh
->output_name
= NULL
;
2744 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2745 shortcuts to them in our hash table. */
2748 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
2750 struct elf32_arm_link_hash_table
*htab
;
2752 htab
= elf32_arm_hash_table (info
);
2756 /* BPABI objects never have a GOT, or associated sections. */
2757 if (htab
->symbian_p
)
2760 if (! _bfd_elf_create_got_section (dynobj
, info
))
2763 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
2764 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
2765 if (!htab
->sgot
|| !htab
->sgotplt
)
2768 htab
->srelgot
= bfd_get_section_by_name (dynobj
,
2769 RELOC_SECTION (htab
, ".got"));
2770 if (htab
->srelgot
== NULL
)
2775 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2776 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2780 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
2782 struct elf32_arm_link_hash_table
*htab
;
2784 htab
= elf32_arm_hash_table (info
);
2788 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
2791 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
2794 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
2795 htab
->srelplt
= bfd_get_section_by_name (dynobj
,
2796 RELOC_SECTION (htab
, ".plt"));
2797 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
2799 htab
->srelbss
= bfd_get_section_by_name (dynobj
,
2800 RELOC_SECTION (htab
, ".bss"));
2802 if (htab
->vxworks_p
)
2804 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
2809 htab
->plt_header_size
= 0;
2810 htab
->plt_entry_size
2811 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
2815 htab
->plt_header_size
2816 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
2817 htab
->plt_entry_size
2818 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
2825 || (!info
->shared
&& !htab
->srelbss
))
2831 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2834 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
2835 struct elf_link_hash_entry
*dir
,
2836 struct elf_link_hash_entry
*ind
)
2838 struct elf32_arm_link_hash_entry
*edir
, *eind
;
2840 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
2841 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
2843 if (eind
->relocs_copied
!= NULL
)
2845 if (edir
->relocs_copied
!= NULL
)
2847 struct elf32_arm_relocs_copied
**pp
;
2848 struct elf32_arm_relocs_copied
*p
;
2850 /* Add reloc counts against the indirect sym to the direct sym
2851 list. Merge any entries against the same section. */
2852 for (pp
= &eind
->relocs_copied
; (p
= *pp
) != NULL
; )
2854 struct elf32_arm_relocs_copied
*q
;
2856 for (q
= edir
->relocs_copied
; q
!= NULL
; q
= q
->next
)
2857 if (q
->section
== p
->section
)
2859 q
->pc_count
+= p
->pc_count
;
2860 q
->count
+= p
->count
;
2867 *pp
= edir
->relocs_copied
;
2870 edir
->relocs_copied
= eind
->relocs_copied
;
2871 eind
->relocs_copied
= NULL
;
2874 if (ind
->root
.type
== bfd_link_hash_indirect
)
2876 /* Copy over PLT info. */
2877 edir
->plt_thumb_refcount
+= eind
->plt_thumb_refcount
;
2878 eind
->plt_thumb_refcount
= 0;
2879 edir
->plt_maybe_thumb_refcount
+= eind
->plt_maybe_thumb_refcount
;
2880 eind
->plt_maybe_thumb_refcount
= 0;
2882 if (dir
->got
.refcount
<= 0)
2884 edir
->tls_type
= eind
->tls_type
;
2885 eind
->tls_type
= GOT_UNKNOWN
;
2889 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2892 /* Create an ARM elf linker hash table. */
2894 static struct bfd_link_hash_table
*
2895 elf32_arm_link_hash_table_create (bfd
*abfd
)
2897 struct elf32_arm_link_hash_table
*ret
;
2898 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
2900 ret
= (struct elf32_arm_link_hash_table
*) bfd_malloc (amt
);
2904 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
2905 elf32_arm_link_hash_newfunc
,
2906 sizeof (struct elf32_arm_link_hash_entry
),
2914 ret
->sgotplt
= NULL
;
2915 ret
->srelgot
= NULL
;
2917 ret
->srelplt
= NULL
;
2918 ret
->sdynbss
= NULL
;
2919 ret
->srelbss
= NULL
;
2920 ret
->srelplt2
= NULL
;
2921 ret
->thumb_glue_size
= 0;
2922 ret
->arm_glue_size
= 0;
2923 ret
->bx_glue_size
= 0;
2924 memset (ret
->bx_glue_offset
, 0, sizeof (ret
->bx_glue_offset
));
2925 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
2926 ret
->vfp11_erratum_glue_size
= 0;
2927 ret
->num_vfp11_fixes
= 0;
2928 ret
->fix_cortex_a8
= 0;
2929 ret
->bfd_of_glue_owner
= NULL
;
2930 ret
->byteswap_code
= 0;
2931 ret
->target1_is_rel
= 0;
2932 ret
->target2_reloc
= R_ARM_NONE
;
2933 #ifdef FOUR_WORD_PLT
2934 ret
->plt_header_size
= 16;
2935 ret
->plt_entry_size
= 16;
2937 ret
->plt_header_size
= 20;
2938 ret
->plt_entry_size
= 12;
2945 ret
->sym_cache
.abfd
= NULL
;
2947 ret
->tls_ldm_got
.refcount
= 0;
2948 ret
->stub_bfd
= NULL
;
2949 ret
->add_stub_section
= NULL
;
2950 ret
->layout_sections_again
= NULL
;
2951 ret
->stub_group
= NULL
;
2955 ret
->input_list
= NULL
;
2957 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2958 sizeof (struct elf32_arm_stub_hash_entry
)))
2964 return &ret
->root
.root
;
2967 /* Free the derived linker hash table. */
2970 elf32_arm_hash_table_free (struct bfd_link_hash_table
*hash
)
2972 struct elf32_arm_link_hash_table
*ret
2973 = (struct elf32_arm_link_hash_table
*) hash
;
2975 bfd_hash_table_free (&ret
->stub_hash_table
);
2976 _bfd_generic_link_hash_table_free (hash
);
2979 /* Determine if we're dealing with a Thumb only architecture. */
2982 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
2984 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2988 if (arch
== TAG_CPU_ARCH_V6_M
|| arch
== TAG_CPU_ARCH_V6S_M
)
2991 if (arch
!= TAG_CPU_ARCH_V7
&& arch
!= TAG_CPU_ARCH_V7E_M
)
2994 profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
2995 Tag_CPU_arch_profile
);
2997 return profile
== 'M';
3000 /* Determine if we're dealing with a Thumb-2 object. */
3003 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
3005 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3007 return arch
== TAG_CPU_ARCH_V6T2
|| arch
>= TAG_CPU_ARCH_V7
;
3010 /* Determine what kind of NOPs are available. */
3013 arch_has_arm_nop (struct elf32_arm_link_hash_table
*globals
)
3015 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3017 return arch
== TAG_CPU_ARCH_V6T2
3018 || arch
== TAG_CPU_ARCH_V6K
3019 || arch
== TAG_CPU_ARCH_V7
3020 || arch
== TAG_CPU_ARCH_V7E_M
;
3024 arch_has_thumb2_nop (struct elf32_arm_link_hash_table
*globals
)
3026 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3028 return (arch
== TAG_CPU_ARCH_V6T2
|| arch
== TAG_CPU_ARCH_V7
3029 || arch
== TAG_CPU_ARCH_V7E_M
);
3033 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
3037 case arm_stub_long_branch_thumb_only
:
3038 case arm_stub_long_branch_v4t_thumb_arm
:
3039 case arm_stub_short_branch_v4t_thumb_arm
:
3040 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3041 case arm_stub_long_branch_thumb_only_pic
:
3052 /* Determine the type of stub needed, if any, for a call. */
3054 static enum elf32_arm_stub_type
3055 arm_type_of_stub (struct bfd_link_info
*info
,
3056 asection
*input_sec
,
3057 const Elf_Internal_Rela
*rel
,
3058 int *actual_st_type
,
3059 struct elf32_arm_link_hash_entry
*hash
,
3060 bfd_vma destination
,
3066 bfd_signed_vma branch_offset
;
3067 unsigned int r_type
;
3068 struct elf32_arm_link_hash_table
* globals
;
3071 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3073 int st_type
= *actual_st_type
;
3075 /* We don't know the actual type of destination in case it is of
3076 type STT_SECTION: give up. */
3077 if (st_type
== STT_SECTION
)
3080 globals
= elf32_arm_hash_table (info
);
3081 if (globals
== NULL
)
3084 thumb_only
= using_thumb_only (globals
);
3086 thumb2
= using_thumb2 (globals
);
3088 /* Determine where the call point is. */
3089 location
= (input_sec
->output_offset
3090 + input_sec
->output_section
->vma
3093 r_type
= ELF32_R_TYPE (rel
->r_info
);
3095 /* Keep a simpler condition, for the sake of clarity. */
3096 if (globals
->splt
!= NULL
3098 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
3102 /* Note when dealing with PLT entries: the main PLT stub is in
3103 ARM mode, so if the branch is in Thumb mode, another
3104 Thumb->ARM stub will be inserted later just before the ARM
3105 PLT stub. We don't take this extra distance into account
3106 here, because if a long branch stub is needed, we'll add a
3107 Thumb->Arm one and branch directly to the ARM PLT entry
3108 because it avoids spreading offset corrections in several
3111 destination
= (globals
->splt
->output_section
->vma
3112 + globals
->splt
->output_offset
3113 + hash
->root
.plt
.offset
);
3117 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3119 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
3121 /* Handle cases where:
3122 - this call goes too far (different Thumb/Thumb2 max
3124 - it's a Thumb->Arm call and blx is not available, or it's a
3125 Thumb->Arm branch (not bl). A stub is needed in this case,
3126 but only if this call is not through a PLT entry. Indeed,
3127 PLT stubs handle mode switching already.
3130 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3131 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3133 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3134 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3135 || ((st_type
!= STT_ARM_TFUNC
)
3136 && (((r_type
== R_ARM_THM_CALL
) && !globals
->use_blx
)
3137 || (r_type
== R_ARM_THM_JUMP24
))
3140 if (st_type
== STT_ARM_TFUNC
)
3142 /* Thumb to thumb. */
3145 stub_type
= (info
->shared
| globals
->pic_veneer
)
3147 ? ((globals
->use_blx
3148 && (r_type
==R_ARM_THM_CALL
))
3149 /* V5T and above. Stub starts with ARM code, so
3150 we must be able to switch mode before
3151 reaching it, which is only possible for 'bl'
3152 (ie R_ARM_THM_CALL relocation). */
3153 ? arm_stub_long_branch_any_thumb_pic
3154 /* On V4T, use Thumb code only. */
3155 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
3157 /* non-PIC stubs. */
3158 : ((globals
->use_blx
3159 && (r_type
==R_ARM_THM_CALL
))
3160 /* V5T and above. */
3161 ? arm_stub_long_branch_any_any
3163 : arm_stub_long_branch_v4t_thumb_thumb
);
3167 stub_type
= (info
->shared
| globals
->pic_veneer
)
3169 ? arm_stub_long_branch_thumb_only_pic
3171 : arm_stub_long_branch_thumb_only
;
3178 && sym_sec
->owner
!= NULL
3179 && !INTERWORK_FLAG (sym_sec
->owner
))
3181 (*_bfd_error_handler
)
3182 (_("%B(%s): warning: interworking not enabled.\n"
3183 " first occurrence: %B: Thumb call to ARM"),
3184 sym_sec
->owner
, input_bfd
, name
);
3187 stub_type
= (info
->shared
| globals
->pic_veneer
)
3189 ? ((globals
->use_blx
3190 && (r_type
==R_ARM_THM_CALL
))
3191 /* V5T and above. */
3192 ? arm_stub_long_branch_any_arm_pic
3194 : arm_stub_long_branch_v4t_thumb_arm_pic
)
3196 /* non-PIC stubs. */
3197 : ((globals
->use_blx
3198 && (r_type
==R_ARM_THM_CALL
))
3199 /* V5T and above. */
3200 ? arm_stub_long_branch_any_any
3202 : arm_stub_long_branch_v4t_thumb_arm
);
3204 /* Handle v4t short branches. */
3205 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
3206 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
3207 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
3208 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
3212 else if (r_type
== R_ARM_CALL
3213 || r_type
== R_ARM_JUMP24
3214 || r_type
== R_ARM_PLT32
)
3216 if (st_type
== STT_ARM_TFUNC
)
3221 && sym_sec
->owner
!= NULL
3222 && !INTERWORK_FLAG (sym_sec
->owner
))
3224 (*_bfd_error_handler
)
3225 (_("%B(%s): warning: interworking not enabled.\n"
3226 " first occurrence: %B: ARM call to Thumb"),
3227 sym_sec
->owner
, input_bfd
, name
);
3230 /* We have an extra 2-bytes reach because of
3231 the mode change (bit 24 (H) of BLX encoding). */
3232 if (branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
3233 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
3234 || ((r_type
== R_ARM_CALL
) && !globals
->use_blx
)
3235 || (r_type
== R_ARM_JUMP24
)
3236 || (r_type
== R_ARM_PLT32
))
3238 stub_type
= (info
->shared
| globals
->pic_veneer
)
3240 ? ((globals
->use_blx
)
3241 /* V5T and above. */
3242 ? arm_stub_long_branch_any_thumb_pic
3244 : arm_stub_long_branch_v4t_arm_thumb_pic
)
3246 /* non-PIC stubs. */
3247 : ((globals
->use_blx
)
3248 /* V5T and above. */
3249 ? arm_stub_long_branch_any_any
3251 : arm_stub_long_branch_v4t_arm_thumb
);
3257 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
3258 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
3260 stub_type
= (info
->shared
| globals
->pic_veneer
)
3262 ? arm_stub_long_branch_any_arm_pic
3263 /* non-PIC stubs. */
3264 : arm_stub_long_branch_any_any
;
3269 /* If a stub is needed, record the actual destination type. */
3270 if (stub_type
!= arm_stub_none
)
3272 *actual_st_type
= st_type
;
3278 /* Build a name for an entry in the stub hash table. */
3281 elf32_arm_stub_name (const asection
*input_section
,
3282 const asection
*sym_sec
,
3283 const struct elf32_arm_link_hash_entry
*hash
,
3284 const Elf_Internal_Rela
*rel
,
3285 enum elf32_arm_stub_type stub_type
)
3292 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1 + 2 + 1;
3293 stub_name
= (char *) bfd_malloc (len
);
3294 if (stub_name
!= NULL
)
3295 sprintf (stub_name
, "%08x_%s+%x_%d",
3296 input_section
->id
& 0xffffffff,
3297 hash
->root
.root
.root
.string
,
3298 (int) rel
->r_addend
& 0xffffffff,
3303 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
3304 stub_name
= (char *) bfd_malloc (len
);
3305 if (stub_name
!= NULL
)
3306 sprintf (stub_name
, "%08x_%x:%x+%x_%d",
3307 input_section
->id
& 0xffffffff,
3308 sym_sec
->id
& 0xffffffff,
3309 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
3310 (int) rel
->r_addend
& 0xffffffff,
3317 /* Look up an entry in the stub hash. Stub entries are cached because
3318 creating the stub name takes a bit of time. */
3320 static struct elf32_arm_stub_hash_entry
*
3321 elf32_arm_get_stub_entry (const asection
*input_section
,
3322 const asection
*sym_sec
,
3323 struct elf_link_hash_entry
*hash
,
3324 const Elf_Internal_Rela
*rel
,
3325 struct elf32_arm_link_hash_table
*htab
,
3326 enum elf32_arm_stub_type stub_type
)
3328 struct elf32_arm_stub_hash_entry
*stub_entry
;
3329 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
3330 const asection
*id_sec
;
3332 if ((input_section
->flags
& SEC_CODE
) == 0)
3335 /* If this input section is part of a group of sections sharing one
3336 stub section, then use the id of the first section in the group.
3337 Stub names need to include a section id, as there may well be
3338 more than one stub used to reach say, printf, and we need to
3339 distinguish between them. */
3340 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3342 if (h
!= NULL
&& h
->stub_cache
!= NULL
3343 && h
->stub_cache
->h
== h
3344 && h
->stub_cache
->id_sec
== id_sec
3345 && h
->stub_cache
->stub_type
== stub_type
)
3347 stub_entry
= h
->stub_cache
;
3353 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
, stub_type
);
3354 if (stub_name
== NULL
)
3357 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
3358 stub_name
, FALSE
, FALSE
);
3360 h
->stub_cache
= stub_entry
;
3368 /* Find or create a stub section. Returns a pointer to the stub section, and
3369 the section to which the stub section will be attached (in *LINK_SEC_P).
3370 LINK_SEC_P may be NULL. */
3373 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3374 struct elf32_arm_link_hash_table
*htab
)
3379 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3380 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3381 if (stub_sec
== NULL
)
3383 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3384 if (stub_sec
== NULL
)
3390 namelen
= strlen (link_sec
->name
);
3391 len
= namelen
+ sizeof (STUB_SUFFIX
);
3392 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
3396 memcpy (s_name
, link_sec
->name
, namelen
);
3397 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3398 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
3399 if (stub_sec
== NULL
)
3401 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3403 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3407 *link_sec_p
= link_sec
;
3412 /* Add a new stub entry to the stub hash. Not all fields of the new
3413 stub entry are initialised. */
3415 static struct elf32_arm_stub_hash_entry
*
3416 elf32_arm_add_stub (const char *stub_name
,
3418 struct elf32_arm_link_hash_table
*htab
)
3422 struct elf32_arm_stub_hash_entry
*stub_entry
;
3424 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
);
3425 if (stub_sec
== NULL
)
3428 /* Enter this entry into the linker stub hash table. */
3429 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3431 if (stub_entry
== NULL
)
3433 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3439 stub_entry
->stub_sec
= stub_sec
;
3440 stub_entry
->stub_offset
= 0;
3441 stub_entry
->id_sec
= link_sec
;
3446 /* Store an Arm insn into an output section not processed by
3447 elf32_arm_write_section. */
3450 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
3451 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3453 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3454 bfd_putl32 (val
, ptr
);
3456 bfd_putb32 (val
, ptr
);
3459 /* Store a 16-bit Thumb insn into an output section not processed by
3460 elf32_arm_write_section. */
3463 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
3464 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3466 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3467 bfd_putl16 (val
, ptr
);
3469 bfd_putb16 (val
, ptr
);
3472 static bfd_reloc_status_type elf32_arm_final_link_relocate
3473 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
3474 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
3475 const char *, int, struct elf_link_hash_entry
*, bfd_boolean
*, char **);
3478 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
3482 struct elf32_arm_stub_hash_entry
*stub_entry
;
3483 struct elf32_arm_link_hash_table
*globals
;
3484 struct bfd_link_info
*info
;
3492 const insn_sequence
*template_sequence
;
3494 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
3495 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
3498 /* Massage our args to the form they really have. */
3499 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3500 info
= (struct bfd_link_info
*) in_arg
;
3502 globals
= elf32_arm_hash_table (info
);
3503 if (globals
== NULL
)
3506 stub_sec
= stub_entry
->stub_sec
;
3508 if ((globals
->fix_cortex_a8
< 0)
3509 != (stub_entry
->stub_type
>= arm_stub_a8_veneer_lwm
))
3510 /* We have to do the a8 fixes last, as they are less aligned than
3511 the other veneers. */
3514 /* Make a note of the offset within the stubs for this entry. */
3515 stub_entry
->stub_offset
= stub_sec
->size
;
3516 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
3518 stub_bfd
= stub_sec
->owner
;
3520 /* This is the address of the start of the stub. */
3521 stub_addr
= stub_sec
->output_section
->vma
+ stub_sec
->output_offset
3522 + stub_entry
->stub_offset
;
3524 /* This is the address of the stub destination. */
3525 sym_value
= (stub_entry
->target_value
3526 + stub_entry
->target_section
->output_offset
3527 + stub_entry
->target_section
->output_section
->vma
);
3529 template_sequence
= stub_entry
->stub_template
;
3530 template_size
= stub_entry
->stub_template_size
;
3533 for (i
= 0; i
< template_size
; i
++)
3535 switch (template_sequence
[i
].type
)
3539 bfd_vma data
= (bfd_vma
) template_sequence
[i
].data
;
3540 if (template_sequence
[i
].reloc_addend
!= 0)
3542 /* We've borrowed the reloc_addend field to mean we should
3543 insert a condition code into this (Thumb-1 branch)
3544 instruction. See THUMB16_BCOND_INSN. */
3545 BFD_ASSERT ((data
& 0xff00) == 0xd000);
3546 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
3548 bfd_put_16 (stub_bfd
, data
, loc
+ size
);
3554 bfd_put_16 (stub_bfd
,
3555 (template_sequence
[i
].data
>> 16) & 0xffff,
3557 bfd_put_16 (stub_bfd
, template_sequence
[i
].data
& 0xffff,
3559 if (template_sequence
[i
].r_type
!= R_ARM_NONE
)
3561 stub_reloc_idx
[nrelocs
] = i
;
3562 stub_reloc_offset
[nrelocs
++] = size
;
3568 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
,
3570 /* Handle cases where the target is encoded within the
3572 if (template_sequence
[i
].r_type
== R_ARM_JUMP24
)
3574 stub_reloc_idx
[nrelocs
] = i
;
3575 stub_reloc_offset
[nrelocs
++] = size
;
3581 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
, loc
+ size
);
3582 stub_reloc_idx
[nrelocs
] = i
;
3583 stub_reloc_offset
[nrelocs
++] = size
;
3593 stub_sec
->size
+= size
;
3595 /* Stub size has already been computed in arm_size_one_stub. Check
3597 BFD_ASSERT (size
== stub_entry
->stub_size
);
3599 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3600 if (stub_entry
->st_type
== STT_ARM_TFUNC
)
3603 /* Assume there is at least one and at most MAXRELOCS entries to relocate
3605 BFD_ASSERT (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
);
3607 for (i
= 0; i
< nrelocs
; i
++)
3608 if (template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP24
3609 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP19
3610 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_CALL
3611 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_XPC22
)
3613 Elf_Internal_Rela rel
;
3614 bfd_boolean unresolved_reloc
;
3615 char *error_message
;
3617 = (template_sequence
[stub_reloc_idx
[i
]].r_type
!= R_ARM_THM_XPC22
)
3618 ? STT_ARM_TFUNC
: 0;
3619 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
;
3621 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
3622 rel
.r_info
= ELF32_R_INFO (0,
3623 template_sequence
[stub_reloc_idx
[i
]].r_type
);
3624 rel
.r_addend
= template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
3626 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
3627 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
3628 template should refer back to the instruction after the original
3630 points_to
= sym_value
;
3632 /* There may be unintended consequences if this is not true. */
3633 BFD_ASSERT (stub_entry
->h
== NULL
);
3635 /* Note: _bfd_final_link_relocate doesn't handle these relocations
3636 properly. We should probably use this function unconditionally,
3637 rather than only for certain relocations listed in the enclosing
3638 conditional, for the sake of consistency. */
3639 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3640 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
3641 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
3642 points_to
, info
, stub_entry
->target_section
, "", sym_flags
,
3643 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
3648 Elf_Internal_Rela rel
;
3649 bfd_boolean unresolved_reloc
;
3650 char *error_message
;
3651 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
3652 + template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
3654 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
3655 rel
.r_info
= ELF32_R_INFO (0,
3656 template_sequence
[stub_reloc_idx
[i
]].r_type
);
3659 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
3660 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
3661 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
3662 points_to
, info
, stub_entry
->target_section
, "", stub_entry
->st_type
,
3663 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
3671 /* Calculate the template, template size and instruction size for a stub.
3672 Return value is the instruction size. */
3675 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
3676 const insn_sequence
**stub_template
,
3677 int *stub_template_size
)
3679 const insn_sequence
*template_sequence
= NULL
;
3680 int template_size
= 0, i
;
3683 template_sequence
= stub_definitions
[stub_type
].template_sequence
;
3684 template_size
= stub_definitions
[stub_type
].template_size
;
3687 for (i
= 0; i
< template_size
; i
++)
3689 switch (template_sequence
[i
].type
)
3708 *stub_template
= template_sequence
;
3710 if (stub_template_size
)
3711 *stub_template_size
= template_size
;
3716 /* As above, but don't actually build the stub. Just bump offset so
3717 we know stub section sizes. */
3720 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
3723 struct elf32_arm_stub_hash_entry
*stub_entry
;
3724 struct elf32_arm_link_hash_table
*htab
;
3725 const insn_sequence
*template_sequence
;
3726 int template_size
, size
;
3728 /* Massage our args to the form they really have. */
3729 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3730 htab
= (struct elf32_arm_link_hash_table
*) in_arg
;
3732 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
3733 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
3735 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template_sequence
,
3738 stub_entry
->stub_size
= size
;
3739 stub_entry
->stub_template
= template_sequence
;
3740 stub_entry
->stub_template_size
= template_size
;
3742 size
= (size
+ 7) & ~7;
3743 stub_entry
->stub_sec
->size
+= size
;
3748 /* External entry points for sizing and building linker stubs. */
3750 /* Set up various things so that we can make a list of input sections
3751 for each output section included in the link. Returns -1 on error,
3752 0 when no stubs will be needed, and 1 on success. */
3755 elf32_arm_setup_section_lists (bfd
*output_bfd
,
3756 struct bfd_link_info
*info
)
3759 unsigned int bfd_count
;
3760 int top_id
, top_index
;
3762 asection
**input_list
, **list
;
3764 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3768 if (! is_elf_hash_table (htab
))
3771 /* Count the number of input BFDs and find the top input section id. */
3772 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3774 input_bfd
= input_bfd
->link_next
)
3777 for (section
= input_bfd
->sections
;
3779 section
= section
->next
)
3781 if (top_id
< section
->id
)
3782 top_id
= section
->id
;
3785 htab
->bfd_count
= bfd_count
;
3787 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3788 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
3789 if (htab
->stub_group
== NULL
)
3791 htab
->top_id
= top_id
;
3793 /* We can't use output_bfd->section_count here to find the top output
3794 section index as some sections may have been removed, and
3795 _bfd_strip_section_from_output doesn't renumber the indices. */
3796 for (section
= output_bfd
->sections
, top_index
= 0;
3798 section
= section
->next
)
3800 if (top_index
< section
->index
)
3801 top_index
= section
->index
;
3804 htab
->top_index
= top_index
;
3805 amt
= sizeof (asection
*) * (top_index
+ 1);
3806 input_list
= (asection
**) bfd_malloc (amt
);
3807 htab
->input_list
= input_list
;
3808 if (input_list
== NULL
)
3811 /* For sections we aren't interested in, mark their entries with a
3812 value we can check later. */
3813 list
= input_list
+ top_index
;
3815 *list
= bfd_abs_section_ptr
;
3816 while (list
-- != input_list
);
3818 for (section
= output_bfd
->sections
;
3820 section
= section
->next
)
3822 if ((section
->flags
& SEC_CODE
) != 0)
3823 input_list
[section
->index
] = NULL
;
3829 /* The linker repeatedly calls this function for each input section,
3830 in the order that input sections are linked into output sections.
3831 Build lists of input sections to determine groupings between which
3832 we may insert linker stubs. */
3835 elf32_arm_next_input_section (struct bfd_link_info
*info
,
3838 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3843 if (isec
->output_section
->index
<= htab
->top_index
)
3845 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3847 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
3849 /* Steal the link_sec pointer for our list. */
3850 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3851 /* This happens to make the list in reverse order,
3852 which we reverse later. */
3853 PREV_SEC (isec
) = *list
;
3859 /* See whether we can group stub sections together. Grouping stub
3860 sections may result in fewer stubs. More importantly, we need to
3861 put all .init* and .fini* stubs at the end of the .init or
3862 .fini output sections respectively, because glibc splits the
3863 _init and _fini functions into multiple parts. Putting a stub in
3864 the middle of a function is not a good idea. */
3867 group_sections (struct elf32_arm_link_hash_table
*htab
,
3868 bfd_size_type stub_group_size
,
3869 bfd_boolean stubs_always_after_branch
)
3871 asection
**list
= htab
->input_list
;
3875 asection
*tail
= *list
;
3878 if (tail
== bfd_abs_section_ptr
)
3881 /* Reverse the list: we must avoid placing stubs at the
3882 beginning of the section because the beginning of the text
3883 section may be required for an interrupt vector in bare metal
3885 #define NEXT_SEC PREV_SEC
3887 while (tail
!= NULL
)
3889 /* Pop from tail. */
3890 asection
*item
= tail
;
3891 tail
= PREV_SEC (item
);
3894 NEXT_SEC (item
) = head
;
3898 while (head
!= NULL
)
3902 bfd_vma stub_group_start
= head
->output_offset
;
3903 bfd_vma end_of_next
;
3906 while (NEXT_SEC (curr
) != NULL
)
3908 next
= NEXT_SEC (curr
);
3909 end_of_next
= next
->output_offset
+ next
->size
;
3910 if (end_of_next
- stub_group_start
>= stub_group_size
)
3911 /* End of NEXT is too far from start, so stop. */
3913 /* Add NEXT to the group. */
3917 /* OK, the size from the start to the start of CURR is less
3918 than stub_group_size and thus can be handled by one stub
3919 section. (Or the head section is itself larger than
3920 stub_group_size, in which case we may be toast.)
3921 We should really be keeping track of the total size of
3922 stubs added here, as stubs contribute to the final output
3926 next
= NEXT_SEC (head
);
3927 /* Set up this stub group. */
3928 htab
->stub_group
[head
->id
].link_sec
= curr
;
3930 while (head
!= curr
&& (head
= next
) != NULL
);
3932 /* But wait, there's more! Input sections up to stub_group_size
3933 bytes after the stub section can be handled by it too. */
3934 if (!stubs_always_after_branch
)
3936 stub_group_start
= curr
->output_offset
+ curr
->size
;
3938 while (next
!= NULL
)
3940 end_of_next
= next
->output_offset
+ next
->size
;
3941 if (end_of_next
- stub_group_start
>= stub_group_size
)
3942 /* End of NEXT is too far from stubs, so stop. */
3944 /* Add NEXT to the stub group. */
3946 next
= NEXT_SEC (head
);
3947 htab
->stub_group
[head
->id
].link_sec
= curr
;
3953 while (list
++ != htab
->input_list
+ htab
->top_index
);
3955 free (htab
->input_list
);
3960 /* Comparison function for sorting/searching relocations relating to Cortex-A8
3964 a8_reloc_compare (const void *a
, const void *b
)
3966 const struct a8_erratum_reloc
*ra
= (const struct a8_erratum_reloc
*) a
;
3967 const struct a8_erratum_reloc
*rb
= (const struct a8_erratum_reloc
*) b
;
3969 if (ra
->from
< rb
->from
)
3971 else if (ra
->from
> rb
->from
)
3977 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
3978 const char *, char **);
3980 /* Helper function to scan code for sequences which might trigger the Cortex-A8
3981 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
3982 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
3986 cortex_a8_erratum_scan (bfd
*input_bfd
,
3987 struct bfd_link_info
*info
,
3988 struct a8_erratum_fix
**a8_fixes_p
,
3989 unsigned int *num_a8_fixes_p
,
3990 unsigned int *a8_fix_table_size_p
,
3991 struct a8_erratum_reloc
*a8_relocs
,
3992 unsigned int num_a8_relocs
,
3993 unsigned prev_num_a8_fixes
,
3994 bfd_boolean
*stub_changed_p
)
3997 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
3998 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
3999 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
4000 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
4005 for (section
= input_bfd
->sections
;
4007 section
= section
->next
)
4009 bfd_byte
*contents
= NULL
;
4010 struct _arm_elf_section_data
*sec_data
;
4014 if (elf_section_type (section
) != SHT_PROGBITS
4015 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
4016 || (section
->flags
& SEC_EXCLUDE
) != 0
4017 || (section
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
4018 || (section
->output_section
== bfd_abs_section_ptr
))
4021 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
4023 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
4024 contents
= elf_section_data (section
)->this_hdr
.contents
;
4025 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
4028 sec_data
= elf32_arm_section_data (section
);
4030 for (span
= 0; span
< sec_data
->mapcount
; span
++)
4032 unsigned int span_start
= sec_data
->map
[span
].vma
;
4033 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
4034 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
4036 char span_type
= sec_data
->map
[span
].type
;
4037 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
4039 if (span_type
!= 't')
4042 /* Span is entirely within a single 4KB region: skip scanning. */
4043 if (((base_vma
+ span_start
) & ~0xfff)
4044 == ((base_vma
+ span_end
) & ~0xfff))
4047 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4049 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4050 * The branch target is in the same 4KB region as the
4051 first half of the branch.
4052 * The instruction before the branch is a 32-bit
4053 length non-branch instruction. */
4054 for (i
= span_start
; i
< span_end
;)
4056 unsigned int insn
= bfd_getl16 (&contents
[i
]);
4057 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
4058 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
4060 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
4065 /* Load the rest of the insn (in manual-friendly order). */
4066 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
4068 /* Encoding T4: B<c>.W. */
4069 is_b
= (insn
& 0xf800d000) == 0xf0009000;
4070 /* Encoding T1: BL<c>.W. */
4071 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
4072 /* Encoding T2: BLX<c>.W. */
4073 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
4074 /* Encoding T3: B<c>.W (not permitted in IT block). */
4075 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
4076 && (insn
& 0x07f00000) != 0x03800000;
4079 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
4081 if (((base_vma
+ i
) & 0xfff) == 0xffe
4085 && ! last_was_branch
)
4087 bfd_signed_vma offset
= 0;
4088 bfd_boolean force_target_arm
= FALSE
;
4089 bfd_boolean force_target_thumb
= FALSE
;
4091 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
4092 struct a8_erratum_reloc key
, *found
;
4094 key
.from
= base_vma
+ i
;
4095 found
= (struct a8_erratum_reloc
*)
4096 bsearch (&key
, a8_relocs
, num_a8_relocs
,
4097 sizeof (struct a8_erratum_reloc
),
4102 char *error_message
= NULL
;
4103 struct elf_link_hash_entry
*entry
;
4105 /* We don't care about the error returned from this
4106 function, only if there is glue or not. */
4107 entry
= find_thumb_glue (info
, found
->sym_name
,
4111 found
->non_a8_stub
= TRUE
;
4113 if (found
->r_type
== R_ARM_THM_CALL
4114 && found
->st_type
!= STT_ARM_TFUNC
)
4115 force_target_arm
= TRUE
;
4116 else if (found
->r_type
== R_ARM_THM_CALL
4117 && found
->st_type
== STT_ARM_TFUNC
)
4118 force_target_thumb
= TRUE
;
4121 /* Check if we have an offending branch instruction. */
4123 if (found
&& found
->non_a8_stub
)
4124 /* We've already made a stub for this instruction, e.g.
4125 it's a long branch or a Thumb->ARM stub. Assume that
4126 stub will suffice to work around the A8 erratum (see
4127 setting of always_after_branch above). */
4131 offset
= (insn
& 0x7ff) << 1;
4132 offset
|= (insn
& 0x3f0000) >> 4;
4133 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
4134 offset
|= (insn
& 0x800) ? 0x80000 : 0;
4135 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
4136 if (offset
& 0x100000)
4137 offset
|= ~ ((bfd_signed_vma
) 0xfffff);
4138 stub_type
= arm_stub_a8_veneer_b_cond
;
4140 else if (is_b
|| is_bl
|| is_blx
)
4142 int s
= (insn
& 0x4000000) != 0;
4143 int j1
= (insn
& 0x2000) != 0;
4144 int j2
= (insn
& 0x800) != 0;
4148 offset
= (insn
& 0x7ff) << 1;
4149 offset
|= (insn
& 0x3ff0000) >> 4;
4153 if (offset
& 0x1000000)
4154 offset
|= ~ ((bfd_signed_vma
) 0xffffff);
4157 offset
&= ~ ((bfd_signed_vma
) 3);
4159 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
4160 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
4163 if (stub_type
!= arm_stub_none
)
4165 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
4167 /* The original instruction is a BL, but the target is
4168 an ARM instruction. If we were not making a stub,
4169 the BL would have been converted to a BLX. Use the
4170 BLX stub instead in that case. */
4171 if (htab
->use_blx
&& force_target_arm
4172 && stub_type
== arm_stub_a8_veneer_bl
)
4174 stub_type
= arm_stub_a8_veneer_blx
;
4178 /* Conversely, if the original instruction was
4179 BLX but the target is Thumb mode, use the BL
4181 else if (force_target_thumb
4182 && stub_type
== arm_stub_a8_veneer_blx
)
4184 stub_type
= arm_stub_a8_veneer_bl
;
4190 pc_for_insn
&= ~ ((bfd_vma
) 3);
4192 /* If we found a relocation, use the proper destination,
4193 not the offset in the (unrelocated) instruction.
4194 Note this is always done if we switched the stub type
4198 (bfd_signed_vma
) (found
->destination
- pc_for_insn
);
4200 target
= pc_for_insn
+ offset
;
4202 /* The BLX stub is ARM-mode code. Adjust the offset to
4203 take the different PC value (+8 instead of +4) into
4205 if (stub_type
== arm_stub_a8_veneer_blx
)
4208 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
4210 char *stub_name
= NULL
;
4212 if (num_a8_fixes
== a8_fix_table_size
)
4214 a8_fix_table_size
*= 2;
4215 a8_fixes
= (struct a8_erratum_fix
*)
4216 bfd_realloc (a8_fixes
,
4217 sizeof (struct a8_erratum_fix
)
4218 * a8_fix_table_size
);
4221 if (num_a8_fixes
< prev_num_a8_fixes
)
4223 /* If we're doing a subsequent scan,
4224 check if we've found the same fix as
4225 before, and try and reuse the stub
4227 stub_name
= a8_fixes
[num_a8_fixes
].stub_name
;
4228 if ((a8_fixes
[num_a8_fixes
].section
!= section
)
4229 || (a8_fixes
[num_a8_fixes
].offset
!= i
))
4233 *stub_changed_p
= TRUE
;
4239 stub_name
= (char *) bfd_malloc (8 + 1 + 8 + 1);
4240 if (stub_name
!= NULL
)
4241 sprintf (stub_name
, "%x:%x", section
->id
, i
);
4244 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
4245 a8_fixes
[num_a8_fixes
].section
= section
;
4246 a8_fixes
[num_a8_fixes
].offset
= i
;
4247 a8_fixes
[num_a8_fixes
].addend
= offset
;
4248 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
4249 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
4250 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
4251 a8_fixes
[num_a8_fixes
].st_type
=
4252 is_blx
? STT_FUNC
: STT_ARM_TFUNC
;
4259 i
+= insn_32bit
? 4 : 2;
4260 last_was_32bit
= insn_32bit
;
4261 last_was_branch
= is_32bit_branch
;
4265 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4269 *a8_fixes_p
= a8_fixes
;
4270 *num_a8_fixes_p
= num_a8_fixes
;
4271 *a8_fix_table_size_p
= a8_fix_table_size
;
4276 /* Determine and set the size of the stub section for a final link.
4278 The basic idea here is to examine all the relocations looking for
4279 PC-relative calls to a target that is unreachable with a "bl"
4283 elf32_arm_size_stubs (bfd
*output_bfd
,
4285 struct bfd_link_info
*info
,
4286 bfd_signed_vma group_size
,
4287 asection
* (*add_stub_section
) (const char *, asection
*),
4288 void (*layout_sections_again
) (void))
4290 bfd_size_type stub_group_size
;
4291 bfd_boolean stubs_always_after_branch
;
4292 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4293 struct a8_erratum_fix
*a8_fixes
= NULL
;
4294 unsigned int num_a8_fixes
= 0, a8_fix_table_size
= 10;
4295 struct a8_erratum_reloc
*a8_relocs
= NULL
;
4296 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
4301 if (htab
->fix_cortex_a8
)
4303 a8_fixes
= (struct a8_erratum_fix
*)
4304 bfd_zmalloc (sizeof (struct a8_erratum_fix
) * a8_fix_table_size
);
4305 a8_relocs
= (struct a8_erratum_reloc
*)
4306 bfd_zmalloc (sizeof (struct a8_erratum_reloc
) * a8_reloc_table_size
);
4309 /* Propagate mach to stub bfd, because it may not have been
4310 finalized when we created stub_bfd. */
4311 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4312 bfd_get_mach (output_bfd
));
4314 /* Stash our params away. */
4315 htab
->stub_bfd
= stub_bfd
;
4316 htab
->add_stub_section
= add_stub_section
;
4317 htab
->layout_sections_again
= layout_sections_again
;
4318 stubs_always_after_branch
= group_size
< 0;
4320 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4321 as the first half of a 32-bit branch straddling two 4K pages. This is a
4322 crude way of enforcing that. */
4323 if (htab
->fix_cortex_a8
)
4324 stubs_always_after_branch
= 1;
4327 stub_group_size
= -group_size
;
4329 stub_group_size
= group_size
;
4331 if (stub_group_size
== 1)
4333 /* Default values. */
4334 /* Thumb branch range is +-4MB has to be used as the default
4335 maximum size (a given section can contain both ARM and Thumb
4336 code, so the worst case has to be taken into account).
4338 This value is 24K less than that, which allows for 2025
4339 12-byte stubs. If we exceed that, then we will fail to link.
4340 The user will have to relink with an explicit group size
4342 stub_group_size
= 4170000;
4345 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
4347 /* If we're applying the cortex A8 fix, we need to determine the
4348 program header size now, because we cannot change it later --
4349 that could alter section placements. Notice the A8 erratum fix
4350 ends up requiring the section addresses to remain unchanged
4351 modulo the page size. That's something we cannot represent
4352 inside BFD, and we don't want to force the section alignment to
4353 be the page size. */
4354 if (htab
->fix_cortex_a8
)
4355 (*htab
->layout_sections_again
) ();
4360 unsigned int bfd_indx
;
4362 bfd_boolean stub_changed
= FALSE
;
4363 unsigned prev_num_a8_fixes
= num_a8_fixes
;
4366 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4368 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4370 Elf_Internal_Shdr
*symtab_hdr
;
4372 Elf_Internal_Sym
*local_syms
= NULL
;
4376 /* We'll need the symbol table in a second. */
4377 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4378 if (symtab_hdr
->sh_info
== 0)
4381 /* Walk over each section attached to the input bfd. */
4382 for (section
= input_bfd
->sections
;
4384 section
= section
->next
)
4386 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4388 /* If there aren't any relocs, then there's nothing more
4390 if ((section
->flags
& SEC_RELOC
) == 0
4391 || section
->reloc_count
== 0
4392 || (section
->flags
& SEC_CODE
) == 0)
4395 /* If this section is a link-once section that will be
4396 discarded, then don't create any stubs. */
4397 if (section
->output_section
== NULL
4398 || section
->output_section
->owner
!= output_bfd
)
4401 /* Get the relocs. */
4403 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
4404 NULL
, info
->keep_memory
);
4405 if (internal_relocs
== NULL
)
4406 goto error_ret_free_local
;
4408 /* Now examine each relocation. */
4409 irela
= internal_relocs
;
4410 irelaend
= irela
+ section
->reloc_count
;
4411 for (; irela
< irelaend
; irela
++)
4413 unsigned int r_type
, r_indx
;
4414 enum elf32_arm_stub_type stub_type
;
4415 struct elf32_arm_stub_hash_entry
*stub_entry
;
4418 bfd_vma destination
;
4419 struct elf32_arm_link_hash_entry
*hash
;
4420 const char *sym_name
;
4422 const asection
*id_sec
;
4424 bfd_boolean created_stub
= FALSE
;
4426 r_type
= ELF32_R_TYPE (irela
->r_info
);
4427 r_indx
= ELF32_R_SYM (irela
->r_info
);
4429 if (r_type
>= (unsigned int) R_ARM_max
)
4431 bfd_set_error (bfd_error_bad_value
);
4432 error_ret_free_internal
:
4433 if (elf_section_data (section
)->relocs
== NULL
)
4434 free (internal_relocs
);
4435 goto error_ret_free_local
;
4438 /* Only look for stubs on branch instructions. */
4439 if ((r_type
!= (unsigned int) R_ARM_CALL
)
4440 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
4441 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
4442 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
4443 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
4444 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
4445 && (r_type
!= (unsigned int) R_ARM_PLT32
))
4448 /* Now determine the call target, its name, value,
4455 if (r_indx
< symtab_hdr
->sh_info
)
4457 /* It's a local symbol. */
4458 Elf_Internal_Sym
*sym
;
4459 Elf_Internal_Shdr
*hdr
;
4461 if (local_syms
== NULL
)
4464 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4465 if (local_syms
== NULL
)
4467 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4468 symtab_hdr
->sh_info
, 0,
4470 if (local_syms
== NULL
)
4471 goto error_ret_free_internal
;
4474 sym
= local_syms
+ r_indx
;
4475 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4476 sym_sec
= hdr
->bfd_section
;
4478 /* This is an undefined symbol. It can never
4482 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4483 sym_value
= sym
->st_value
;
4484 destination
= (sym_value
+ irela
->r_addend
4485 + sym_sec
->output_offset
4486 + sym_sec
->output_section
->vma
);
4487 st_type
= ELF_ST_TYPE (sym
->st_info
);
4489 = bfd_elf_string_from_elf_section (input_bfd
,
4490 symtab_hdr
->sh_link
,
4495 /* It's an external symbol. */
4498 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4499 hash
= ((struct elf32_arm_link_hash_entry
*)
4500 elf_sym_hashes (input_bfd
)[e_indx
]);
4502 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4503 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4504 hash
= ((struct elf32_arm_link_hash_entry
*)
4505 hash
->root
.root
.u
.i
.link
);
4507 if (hash
->root
.root
.type
== bfd_link_hash_defined
4508 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4510 sym_sec
= hash
->root
.root
.u
.def
.section
;
4511 sym_value
= hash
->root
.root
.u
.def
.value
;
4513 struct elf32_arm_link_hash_table
*globals
=
4514 elf32_arm_hash_table (info
);
4516 /* For a destination in a shared library,
4517 use the PLT stub as target address to
4518 decide whether a branch stub is
4521 && globals
->splt
!= NULL
4523 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4525 sym_sec
= globals
->splt
;
4526 sym_value
= hash
->root
.plt
.offset
;
4527 if (sym_sec
->output_section
!= NULL
)
4528 destination
= (sym_value
4529 + sym_sec
->output_offset
4530 + sym_sec
->output_section
->vma
);
4532 else if (sym_sec
->output_section
!= NULL
)
4533 destination
= (sym_value
+ irela
->r_addend
4534 + sym_sec
->output_offset
4535 + sym_sec
->output_section
->vma
);
4537 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
4538 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
4540 /* For a shared library, use the PLT stub as
4541 target address to decide whether a long
4542 branch stub is needed.
4543 For absolute code, they cannot be handled. */
4544 struct elf32_arm_link_hash_table
*globals
=
4545 elf32_arm_hash_table (info
);
4548 && globals
->splt
!= NULL
4550 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4552 sym_sec
= globals
->splt
;
4553 sym_value
= hash
->root
.plt
.offset
;
4554 if (sym_sec
->output_section
!= NULL
)
4555 destination
= (sym_value
4556 + sym_sec
->output_offset
4557 + sym_sec
->output_section
->vma
);
4564 bfd_set_error (bfd_error_bad_value
);
4565 goto error_ret_free_internal
;
4567 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4568 sym_name
= hash
->root
.root
.root
.string
;
4573 /* Determine what (if any) linker stub is needed. */
4574 stub_type
= arm_type_of_stub (info
, section
, irela
,
4576 destination
, sym_sec
,
4577 input_bfd
, sym_name
);
4578 if (stub_type
== arm_stub_none
)
4581 /* Support for grouping stub sections. */
4582 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4584 /* Get the name of this stub. */
4585 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
,
4588 goto error_ret_free_internal
;
4590 /* We've either created a stub for this reloc already,
4591 or we are about to. */
4592 created_stub
= TRUE
;
4594 stub_entry
= arm_stub_hash_lookup
4595 (&htab
->stub_hash_table
, stub_name
,
4597 if (stub_entry
!= NULL
)
4599 /* The proper stub has already been created. */
4601 stub_entry
->target_value
= sym_value
;
4605 stub_entry
= elf32_arm_add_stub (stub_name
, section
,
4607 if (stub_entry
== NULL
)
4610 goto error_ret_free_internal
;
4613 stub_entry
->target_value
= sym_value
;
4614 stub_entry
->target_section
= sym_sec
;
4615 stub_entry
->stub_type
= stub_type
;
4616 stub_entry
->h
= hash
;
4617 stub_entry
->st_type
= st_type
;
4619 if (sym_name
== NULL
)
4620 sym_name
= "unnamed";
4621 stub_entry
->output_name
= (char *)
4622 bfd_alloc (htab
->stub_bfd
,
4623 sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
4624 + strlen (sym_name
));
4625 if (stub_entry
->output_name
== NULL
)
4628 goto error_ret_free_internal
;
4631 /* For historical reasons, use the existing names for
4632 ARM-to-Thumb and Thumb-to-ARM stubs. */
4633 if ( ((r_type
== (unsigned int) R_ARM_THM_CALL
)
4634 || (r_type
== (unsigned int) R_ARM_THM_JUMP24
))
4635 && st_type
!= STT_ARM_TFUNC
)
4636 sprintf (stub_entry
->output_name
,
4637 THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
4638 else if ( ((r_type
== (unsigned int) R_ARM_CALL
)
4639 || (r_type
== (unsigned int) R_ARM_JUMP24
))
4640 && st_type
== STT_ARM_TFUNC
)
4641 sprintf (stub_entry
->output_name
,
4642 ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
4644 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
,
4647 stub_changed
= TRUE
;
4651 /* Look for relocations which might trigger Cortex-A8
4653 if (htab
->fix_cortex_a8
4654 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
4655 || r_type
== (unsigned int) R_ARM_THM_JUMP19
4656 || r_type
== (unsigned int) R_ARM_THM_CALL
4657 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
4659 bfd_vma from
= section
->output_section
->vma
4660 + section
->output_offset
4663 if ((from
& 0xfff) == 0xffe)
4665 /* Found a candidate. Note we haven't checked the
4666 destination is within 4K here: if we do so (and
4667 don't create an entry in a8_relocs) we can't tell
4668 that a branch should have been relocated when
4670 if (num_a8_relocs
== a8_reloc_table_size
)
4672 a8_reloc_table_size
*= 2;
4673 a8_relocs
= (struct a8_erratum_reloc
*)
4674 bfd_realloc (a8_relocs
,
4675 sizeof (struct a8_erratum_reloc
)
4676 * a8_reloc_table_size
);
4679 a8_relocs
[num_a8_relocs
].from
= from
;
4680 a8_relocs
[num_a8_relocs
].destination
= destination
;
4681 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
4682 a8_relocs
[num_a8_relocs
].st_type
= st_type
;
4683 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
4684 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
4691 /* We're done with the internal relocs, free them. */
4692 if (elf_section_data (section
)->relocs
== NULL
)
4693 free (internal_relocs
);
4696 if (htab
->fix_cortex_a8
)
4698 /* Sort relocs which might apply to Cortex-A8 erratum. */
4699 qsort (a8_relocs
, num_a8_relocs
,
4700 sizeof (struct a8_erratum_reloc
),
4703 /* Scan for branches which might trigger Cortex-A8 erratum. */
4704 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
4705 &num_a8_fixes
, &a8_fix_table_size
,
4706 a8_relocs
, num_a8_relocs
,
4707 prev_num_a8_fixes
, &stub_changed
)
4709 goto error_ret_free_local
;
4713 if (prev_num_a8_fixes
!= num_a8_fixes
)
4714 stub_changed
= TRUE
;
4719 /* OK, we've added some stubs. Find out the new size of the
4721 for (stub_sec
= htab
->stub_bfd
->sections
;
4723 stub_sec
= stub_sec
->next
)
4725 /* Ignore non-stub sections. */
4726 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4732 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
4734 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
4735 if (htab
->fix_cortex_a8
)
4736 for (i
= 0; i
< num_a8_fixes
; i
++)
4738 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
4739 a8_fixes
[i
].section
, htab
);
4741 if (stub_sec
== NULL
)
4742 goto error_ret_free_local
;
4745 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
4750 /* Ask the linker to do its stuff. */
4751 (*htab
->layout_sections_again
) ();
4754 /* Add stubs for Cortex-A8 erratum fixes now. */
4755 if (htab
->fix_cortex_a8
)
4757 for (i
= 0; i
< num_a8_fixes
; i
++)
4759 struct elf32_arm_stub_hash_entry
*stub_entry
;
4760 char *stub_name
= a8_fixes
[i
].stub_name
;
4761 asection
*section
= a8_fixes
[i
].section
;
4762 unsigned int section_id
= a8_fixes
[i
].section
->id
;
4763 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
4764 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
4765 const insn_sequence
*template_sequence
;
4766 int template_size
, size
= 0;
4768 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
4770 if (stub_entry
== NULL
)
4772 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
4778 stub_entry
->stub_sec
= stub_sec
;
4779 stub_entry
->stub_offset
= 0;
4780 stub_entry
->id_sec
= link_sec
;
4781 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
4782 stub_entry
->target_section
= a8_fixes
[i
].section
;
4783 stub_entry
->target_value
= a8_fixes
[i
].offset
;
4784 stub_entry
->target_addend
= a8_fixes
[i
].addend
;
4785 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
4786 stub_entry
->st_type
= a8_fixes
[i
].st_type
;
4788 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
,
4792 stub_entry
->stub_size
= size
;
4793 stub_entry
->stub_template
= template_sequence
;
4794 stub_entry
->stub_template_size
= template_size
;
4797 /* Stash the Cortex-A8 erratum fix array for use later in
4798 elf32_arm_write_section(). */
4799 htab
->a8_erratum_fixes
= a8_fixes
;
4800 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
4804 htab
->a8_erratum_fixes
= NULL
;
4805 htab
->num_a8_erratum_fixes
= 0;
4809 error_ret_free_local
:
4813 /* Build all the stubs associated with the current output file. The
4814 stubs are kept in a hash table attached to the main linker hash
4815 table. We also set up the .plt entries for statically linked PIC
4816 functions here. This function is called via arm_elf_finish in the
4820 elf32_arm_build_stubs (struct bfd_link_info
*info
)
4823 struct bfd_hash_table
*table
;
4824 struct elf32_arm_link_hash_table
*htab
;
4826 htab
= elf32_arm_hash_table (info
);
4830 for (stub_sec
= htab
->stub_bfd
->sections
;
4832 stub_sec
= stub_sec
->next
)
4836 /* Ignore non-stub sections. */
4837 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4840 /* Allocate memory to hold the linker stubs. */
4841 size
= stub_sec
->size
;
4842 stub_sec
->contents
= (unsigned char *) bfd_zalloc (htab
->stub_bfd
, size
);
4843 if (stub_sec
->contents
== NULL
&& size
!= 0)
4848 /* Build the stubs as directed by the stub hash table. */
4849 table
= &htab
->stub_hash_table
;
4850 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
4851 if (htab
->fix_cortex_a8
)
4853 /* Place the cortex a8 stubs last. */
4854 htab
->fix_cortex_a8
= -1;
4855 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
4861 /* Locate the Thumb encoded calling stub for NAME. */
4863 static struct elf_link_hash_entry
*
4864 find_thumb_glue (struct bfd_link_info
*link_info
,
4866 char **error_message
)
4869 struct elf_link_hash_entry
*hash
;
4870 struct elf32_arm_link_hash_table
*hash_table
;
4872 /* We need a pointer to the armelf specific hash table. */
4873 hash_table
= elf32_arm_hash_table (link_info
);
4874 if (hash_table
== NULL
)
4877 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
4878 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
4880 BFD_ASSERT (tmp_name
);
4882 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
4884 hash
= elf_link_hash_lookup
4885 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4888 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
4889 tmp_name
, name
) == -1)
4890 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
4897 /* Locate the ARM encoded calling stub for NAME. */
4899 static struct elf_link_hash_entry
*
4900 find_arm_glue (struct bfd_link_info
*link_info
,
4902 char **error_message
)
4905 struct elf_link_hash_entry
*myh
;
4906 struct elf32_arm_link_hash_table
*hash_table
;
4908 /* We need a pointer to the elfarm specific hash table. */
4909 hash_table
= elf32_arm_hash_table (link_info
);
4910 if (hash_table
== NULL
)
4913 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
4914 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
4916 BFD_ASSERT (tmp_name
);
4918 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
4920 myh
= elf_link_hash_lookup
4921 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
4924 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
4925 tmp_name
, name
) == -1)
4926 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
4933 /* ARM->Thumb glue (static images):
4937 ldr r12, __func_addr
4940 .word func @ behave as if you saw a ARM_32 reloc.
4947 .word func @ behave as if you saw a ARM_32 reloc.
4949 (relocatable images)
4952 ldr r12, __func_offset
4958 #define ARM2THUMB_STATIC_GLUE_SIZE 12
4959 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
4960 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
4961 static const insn32 a2t3_func_addr_insn
= 0x00000001;
4963 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
4964 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
4965 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
4967 #define ARM2THUMB_PIC_GLUE_SIZE 16
4968 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
4969 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
4970 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
4972 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
4976 __func_from_thumb: __func_from_thumb:
4978 nop ldr r6, __func_addr
4988 #define THUMB2ARM_GLUE_SIZE 8
4989 static const insn16 t2a1_bx_pc_insn
= 0x4778;
4990 static const insn16 t2a2_noop_insn
= 0x46c0;
4991 static const insn32 t2a3_b_insn
= 0xea000000;
4993 #define VFP11_ERRATUM_VENEER_SIZE 8
4995 #define ARM_BX_VENEER_SIZE 12
4996 static const insn32 armbx1_tst_insn
= 0xe3100001;
4997 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
4998 static const insn32 armbx3_bx_insn
= 0xe12fff10;
5000 #ifndef ELFARM_NABI_C_INCLUDED
5002 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
5005 bfd_byte
* contents
;
5009 /* Do not include empty glue sections in the output. */
5012 s
= bfd_get_section_by_name (abfd
, name
);
5014 s
->flags
|= SEC_EXCLUDE
;
5019 BFD_ASSERT (abfd
!= NULL
);
5021 s
= bfd_get_section_by_name (abfd
, name
);
5022 BFD_ASSERT (s
!= NULL
);
5024 contents
= (bfd_byte
*) bfd_alloc (abfd
, size
);
5026 BFD_ASSERT (s
->size
== size
);
5027 s
->contents
= contents
;
5031 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
5033 struct elf32_arm_link_hash_table
* globals
;
5035 globals
= elf32_arm_hash_table (info
);
5036 BFD_ASSERT (globals
!= NULL
);
5038 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5039 globals
->arm_glue_size
,
5040 ARM2THUMB_GLUE_SECTION_NAME
);
5042 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5043 globals
->thumb_glue_size
,
5044 THUMB2ARM_GLUE_SECTION_NAME
);
5046 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5047 globals
->vfp11_erratum_glue_size
,
5048 VFP11_ERRATUM_VENEER_SECTION_NAME
);
5050 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5051 globals
->bx_glue_size
,
5052 ARM_BX_GLUE_SECTION_NAME
);
5057 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5058 returns the symbol identifying the stub. */
5060 static struct elf_link_hash_entry
*
5061 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
5062 struct elf_link_hash_entry
* h
)
5064 const char * name
= h
->root
.root
.string
;
5067 struct elf_link_hash_entry
* myh
;
5068 struct bfd_link_hash_entry
* bh
;
5069 struct elf32_arm_link_hash_table
* globals
;
5073 globals
= elf32_arm_hash_table (link_info
);
5074 BFD_ASSERT (globals
!= NULL
);
5075 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5077 s
= bfd_get_section_by_name
5078 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
5080 BFD_ASSERT (s
!= NULL
);
5082 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5083 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5085 BFD_ASSERT (tmp_name
);
5087 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5089 myh
= elf_link_hash_lookup
5090 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5094 /* We've already seen this guy. */
5099 /* The only trick here is using hash_table->arm_glue_size as the value.
5100 Even though the section isn't allocated yet, this is where we will be
5101 putting it. The +1 on the value marks that the stub has not been
5102 output yet - not that it is a Thumb function. */
5104 val
= globals
->arm_glue_size
+ 1;
5105 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5106 tmp_name
, BSF_GLOBAL
, s
, val
,
5107 NULL
, TRUE
, FALSE
, &bh
);
5109 myh
= (struct elf_link_hash_entry
*) bh
;
5110 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5111 myh
->forced_local
= 1;
5115 if (link_info
->shared
|| globals
->root
.is_relocatable_executable
5116 || globals
->pic_veneer
)
5117 size
= ARM2THUMB_PIC_GLUE_SIZE
;
5118 else if (globals
->use_blx
)
5119 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
5121 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
5124 globals
->arm_glue_size
+= size
;
5129 /* Allocate space for ARMv4 BX veneers. */
5132 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
5135 struct elf32_arm_link_hash_table
*globals
;
5137 struct elf_link_hash_entry
*myh
;
5138 struct bfd_link_hash_entry
*bh
;
5141 /* BX PC does not need a veneer. */
5145 globals
= elf32_arm_hash_table (link_info
);
5146 BFD_ASSERT (globals
!= NULL
);
5147 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5149 /* Check if this veneer has already been allocated. */
5150 if (globals
->bx_glue_offset
[reg
])
5153 s
= bfd_get_section_by_name
5154 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
5156 BFD_ASSERT (s
!= NULL
);
5158 /* Add symbol for veneer. */
5160 bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
5162 BFD_ASSERT (tmp_name
);
5164 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
5166 myh
= elf_link_hash_lookup
5167 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5169 BFD_ASSERT (myh
== NULL
);
5172 val
= globals
->bx_glue_size
;
5173 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5174 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5175 NULL
, TRUE
, FALSE
, &bh
);
5177 myh
= (struct elf_link_hash_entry
*) bh
;
5178 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5179 myh
->forced_local
= 1;
5181 s
->size
+= ARM_BX_VENEER_SIZE
;
5182 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
5183 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
5187 /* Add an entry to the code/data map for section SEC. */
5190 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
5192 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
5193 unsigned int newidx
;
5195 if (sec_data
->map
== NULL
)
5197 sec_data
->map
= (elf32_arm_section_map
*)
5198 bfd_malloc (sizeof (elf32_arm_section_map
));
5199 sec_data
->mapcount
= 0;
5200 sec_data
->mapsize
= 1;
5203 newidx
= sec_data
->mapcount
++;
5205 if (sec_data
->mapcount
> sec_data
->mapsize
)
5207 sec_data
->mapsize
*= 2;
5208 sec_data
->map
= (elf32_arm_section_map
*)
5209 bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
5210 * sizeof (elf32_arm_section_map
));
5215 sec_data
->map
[newidx
].vma
= vma
;
5216 sec_data
->map
[newidx
].type
= type
;
5221 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5222 veneers are handled for now. */
5225 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
5226 elf32_vfp11_erratum_list
*branch
,
5228 asection
*branch_sec
,
5229 unsigned int offset
)
5232 struct elf32_arm_link_hash_table
*hash_table
;
5234 struct elf_link_hash_entry
*myh
;
5235 struct bfd_link_hash_entry
*bh
;
5237 struct _arm_elf_section_data
*sec_data
;
5239 elf32_vfp11_erratum_list
*newerr
;
5241 hash_table
= elf32_arm_hash_table (link_info
);
5242 BFD_ASSERT (hash_table
!= NULL
);
5243 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
5245 s
= bfd_get_section_by_name
5246 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
5248 sec_data
= elf32_arm_section_data (s
);
5250 BFD_ASSERT (s
!= NULL
);
5252 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
5253 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
5255 BFD_ASSERT (tmp_name
);
5257 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
5258 hash_table
->num_vfp11_fixes
);
5260 myh
= elf_link_hash_lookup
5261 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5263 BFD_ASSERT (myh
== NULL
);
5266 val
= hash_table
->vfp11_erratum_glue_size
;
5267 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
5268 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5269 NULL
, TRUE
, FALSE
, &bh
);
5271 myh
= (struct elf_link_hash_entry
*) bh
;
5272 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5273 myh
->forced_local
= 1;
5275 /* Link veneer back to calling location. */
5276 errcount
= ++(sec_data
->erratumcount
);
5277 newerr
= (elf32_vfp11_erratum_list
*)
5278 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5280 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
5282 newerr
->u
.v
.branch
= branch
;
5283 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
5284 branch
->u
.b
.veneer
= newerr
;
5286 newerr
->next
= sec_data
->erratumlist
;
5287 sec_data
->erratumlist
= newerr
;
5289 /* A symbol for the return from the veneer. */
5290 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
5291 hash_table
->num_vfp11_fixes
);
5293 myh
= elf_link_hash_lookup
5294 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5301 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
5302 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
5304 myh
= (struct elf_link_hash_entry
*) bh
;
5305 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5306 myh
->forced_local
= 1;
5310 /* Generate a mapping symbol for the veneer section, and explicitly add an
5311 entry for that symbol to the code/data map for the section. */
5312 if (hash_table
->vfp11_erratum_glue_size
== 0)
5315 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5316 ever requires this erratum fix. */
5317 _bfd_generic_link_add_one_symbol (link_info
,
5318 hash_table
->bfd_of_glue_owner
, "$a",
5319 BSF_LOCAL
, s
, 0, NULL
,
5322 myh
= (struct elf_link_hash_entry
*) bh
;
5323 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
5324 myh
->forced_local
= 1;
5326 /* The elf32_arm_init_maps function only cares about symbols from input
5327 BFDs. We must make a note of this generated mapping symbol
5328 ourselves so that code byteswapping works properly in
5329 elf32_arm_write_section. */
5330 elf32_arm_section_map_add (s
, 'a', 0);
5333 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
5334 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
5335 hash_table
->num_vfp11_fixes
++;
5337 /* The offset of the veneer. */
5341 #define ARM_GLUE_SECTION_FLAGS \
5342 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
5343 | SEC_READONLY | SEC_LINKER_CREATED)
5345 /* Create a fake section for use by the ARM backend of the linker. */
5348 arm_make_glue_section (bfd
* abfd
, const char * name
)
5352 sec
= bfd_get_section_by_name (abfd
, name
);
5357 sec
= bfd_make_section_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
5360 || !bfd_set_section_alignment (abfd
, sec
, 2))
5363 /* Set the gc mark to prevent the section from being removed by garbage
5364 collection, despite the fact that no relocs refer to this section. */
5370 /* Add the glue sections to ABFD. This function is called from the
5371 linker scripts in ld/emultempl/{armelf}.em. */
5374 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
5375 struct bfd_link_info
*info
)
5377 /* If we are only performing a partial
5378 link do not bother adding the glue. */
5379 if (info
->relocatable
)
5382 return arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
5383 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
5384 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
5385 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
5388 /* Select a BFD to be used to hold the sections used by the glue code.
5389 This function is called from the linker scripts in ld/emultempl/
5393 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
5395 struct elf32_arm_link_hash_table
*globals
;
5397 /* If we are only performing a partial link
5398 do not bother getting a bfd to hold the glue. */
5399 if (info
->relocatable
)
5402 /* Make sure we don't attach the glue sections to a dynamic object. */
5403 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
5405 globals
= elf32_arm_hash_table (info
);
5406 BFD_ASSERT (globals
!= NULL
);
5408 if (globals
->bfd_of_glue_owner
!= NULL
)
5411 /* Save the bfd for later use. */
5412 globals
->bfd_of_glue_owner
= abfd
;
5418 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
5420 if (bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
5422 globals
->use_blx
= 1;
5426 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
5427 struct bfd_link_info
*link_info
)
5429 Elf_Internal_Shdr
*symtab_hdr
;
5430 Elf_Internal_Rela
*internal_relocs
= NULL
;
5431 Elf_Internal_Rela
*irel
, *irelend
;
5432 bfd_byte
*contents
= NULL
;
5435 struct elf32_arm_link_hash_table
*globals
;
5437 /* If we are only performing a partial link do not bother
5438 to construct any glue. */
5439 if (link_info
->relocatable
)
5442 /* Here we have a bfd that is to be included on the link. We have a
5443 hook to do reloc rummaging, before section sizes are nailed down. */
5444 globals
= elf32_arm_hash_table (link_info
);
5445 BFD_ASSERT (globals
!= NULL
);
5447 check_use_blx (globals
);
5449 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
5451 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
5456 /* PR 5398: If we have not decided to include any loadable sections in
5457 the output then we will not have a glue owner bfd. This is OK, it
5458 just means that there is nothing else for us to do here. */
5459 if (globals
->bfd_of_glue_owner
== NULL
)
5462 /* Rummage around all the relocs and map the glue vectors. */
5463 sec
= abfd
->sections
;
5468 for (; sec
!= NULL
; sec
= sec
->next
)
5470 if (sec
->reloc_count
== 0)
5473 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
5476 symtab_hdr
= & elf_symtab_hdr (abfd
);
5478 /* Load the relocs. */
5480 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
5482 if (internal_relocs
== NULL
)
5485 irelend
= internal_relocs
+ sec
->reloc_count
;
5486 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
5489 unsigned long r_index
;
5491 struct elf_link_hash_entry
*h
;
5493 r_type
= ELF32_R_TYPE (irel
->r_info
);
5494 r_index
= ELF32_R_SYM (irel
->r_info
);
5496 /* These are the only relocation types we care about. */
5497 if ( r_type
!= R_ARM_PC24
5498 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
5501 /* Get the section contents if we haven't done so already. */
5502 if (contents
== NULL
)
5504 /* Get cached copy if it exists. */
5505 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
5506 contents
= elf_section_data (sec
)->this_hdr
.contents
;
5509 /* Go get them off disk. */
5510 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
5515 if (r_type
== R_ARM_V4BX
)
5519 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
5520 record_arm_bx_glue (link_info
, reg
);
5524 /* If the relocation is not against a symbol it cannot concern us. */
5527 /* We don't care about local symbols. */
5528 if (r_index
< symtab_hdr
->sh_info
)
5531 /* This is an external symbol. */
5532 r_index
-= symtab_hdr
->sh_info
;
5533 h
= (struct elf_link_hash_entry
*)
5534 elf_sym_hashes (abfd
)[r_index
];
5536 /* If the relocation is against a static symbol it must be within
5537 the current section and so cannot be a cross ARM/Thumb relocation. */
5541 /* If the call will go through a PLT entry then we do not need
5543 if (globals
->splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
5549 /* This one is a call from arm code. We need to look up
5550 the target of the call. If it is a thumb target, we
5552 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
5553 record_arm_to_thumb_glue (link_info
, h
);
5561 if (contents
!= NULL
5562 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5566 if (internal_relocs
!= NULL
5567 && elf_section_data (sec
)->relocs
!= internal_relocs
)
5568 free (internal_relocs
);
5569 internal_relocs
= NULL
;
5575 if (contents
!= NULL
5576 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
5578 if (internal_relocs
!= NULL
5579 && elf_section_data (sec
)->relocs
!= internal_relocs
)
5580 free (internal_relocs
);
5587 /* Initialise maps of ARM/Thumb/data for input BFDs. */
5590 bfd_elf32_arm_init_maps (bfd
*abfd
)
5592 Elf_Internal_Sym
*isymbuf
;
5593 Elf_Internal_Shdr
*hdr
;
5594 unsigned int i
, localsyms
;
5596 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
5597 if (! is_arm_elf (abfd
))
5600 if ((abfd
->flags
& DYNAMIC
) != 0)
5603 hdr
= & elf_symtab_hdr (abfd
);
5604 localsyms
= hdr
->sh_info
;
5606 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
5607 should contain the number of local symbols, which should come before any
5608 global symbols. Mapping symbols are always local. */
5609 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
5612 /* No internal symbols read? Skip this BFD. */
5613 if (isymbuf
== NULL
)
5616 for (i
= 0; i
< localsyms
; i
++)
5618 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
5619 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5623 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
5625 name
= bfd_elf_string_from_elf_section (abfd
,
5626 hdr
->sh_link
, isym
->st_name
);
5628 if (bfd_is_arm_special_symbol_name (name
,
5629 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
5630 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
5636 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
5637 say what they wanted. */
5640 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
5642 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5643 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
5645 if (globals
== NULL
)
5648 if (globals
->fix_cortex_a8
== -1)
5650 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
5651 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
5652 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
5653 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
5654 globals
->fix_cortex_a8
= 1;
5656 globals
->fix_cortex_a8
= 0;
5662 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
5664 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5665 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
5667 if (globals
== NULL
)
5669 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
5670 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
5672 switch (globals
->vfp11_fix
)
5674 case BFD_ARM_VFP11_FIX_DEFAULT
:
5675 case BFD_ARM_VFP11_FIX_NONE
:
5676 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
5680 /* Give a warning, but do as the user requests anyway. */
5681 (*_bfd_error_handler
) (_("%B: warning: selected VFP11 erratum "
5682 "workaround is not necessary for target architecture"), obfd
);
5685 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
5686 /* For earlier architectures, we might need the workaround, but do not
5687 enable it by default. If users is running with broken hardware, they
5688 must enable the erratum fix explicitly. */
5689 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
5693 enum bfd_arm_vfp11_pipe
5701 /* Return a VFP register number. This is encoded as RX:X for single-precision
5702 registers, or X:RX for double-precision registers, where RX is the group of
5703 four bits in the instruction encoding and X is the single extension bit.
5704 RX and X fields are specified using their lowest (starting) bit. The return
5707 0...31: single-precision registers s0...s31
5708 32...63: double-precision registers d0...d31.
5710 Although X should be zero for VFP11 (encoding d0...d15 only), we might
5711 encounter VFP3 instructions, so we allow the full range for DP registers. */
5714 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
5718 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
5720 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
5723 /* Set bits in *WMASK according to a register number REG as encoded by
5724 bfd_arm_vfp11_regno(). Ignore d16-d31. */
5727 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
5732 *wmask
|= 3 << ((reg
- 32) * 2);
5735 /* Return TRUE if WMASK overwrites anything in REGS. */
5738 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
5742 for (i
= 0; i
< numregs
; i
++)
5744 unsigned int reg
= regs
[i
];
5746 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
5754 if ((wmask
& (3 << (reg
* 2))) != 0)
5761 /* In this function, we're interested in two things: finding input registers
5762 for VFP data-processing instructions, and finding the set of registers which
5763 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
5764 hold the written set, so FLDM etc. are easy to deal with (we're only
5765 interested in 32 SP registers or 16 dp registers, due to the VFP version
5766 implemented by the chip in question). DP registers are marked by setting
5767 both SP registers in the write mask). */
5769 static enum bfd_arm_vfp11_pipe
5770 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
5773 enum bfd_arm_vfp11_pipe vpipe
= VFP11_BAD
;
5774 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
5776 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
5779 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
5780 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
5782 pqrs
= ((insn
& 0x00800000) >> 20)
5783 | ((insn
& 0x00300000) >> 19)
5784 | ((insn
& 0x00000040) >> 6);
5788 case 0: /* fmac[sd]. */
5789 case 1: /* fnmac[sd]. */
5790 case 2: /* fmsc[sd]. */
5791 case 3: /* fnmsc[sd]. */
5793 bfd_arm_vfp11_write_mask (destmask
, fd
);
5795 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
5800 case 4: /* fmul[sd]. */
5801 case 5: /* fnmul[sd]. */
5802 case 6: /* fadd[sd]. */
5803 case 7: /* fsub[sd]. */
5807 case 8: /* fdiv[sd]. */
5810 bfd_arm_vfp11_write_mask (destmask
, fd
);
5811 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
5816 case 15: /* extended opcode. */
5818 unsigned int extn
= ((insn
>> 15) & 0x1e)
5819 | ((insn
>> 7) & 1);
5823 case 0: /* fcpy[sd]. */
5824 case 1: /* fabs[sd]. */
5825 case 2: /* fneg[sd]. */
5826 case 8: /* fcmp[sd]. */
5827 case 9: /* fcmpe[sd]. */
5828 case 10: /* fcmpz[sd]. */
5829 case 11: /* fcmpez[sd]. */
5830 case 16: /* fuito[sd]. */
5831 case 17: /* fsito[sd]. */
5832 case 24: /* ftoui[sd]. */
5833 case 25: /* ftouiz[sd]. */
5834 case 26: /* ftosi[sd]. */
5835 case 27: /* ftosiz[sd]. */
5836 /* These instructions will not bounce due to underflow. */
5841 case 3: /* fsqrt[sd]. */
5842 /* fsqrt cannot underflow, but it can (perhaps) overwrite
5843 registers to cause the erratum in previous instructions. */
5844 bfd_arm_vfp11_write_mask (destmask
, fd
);
5848 case 15: /* fcvt{ds,sd}. */
5852 bfd_arm_vfp11_write_mask (destmask
, fd
);
5854 /* Only FCVTSD can underflow. */
5855 if ((insn
& 0x100) != 0)
5874 /* Two-register transfer. */
5875 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
5877 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
5879 if ((insn
& 0x100000) == 0)
5882 bfd_arm_vfp11_write_mask (destmask
, fm
);
5885 bfd_arm_vfp11_write_mask (destmask
, fm
);
5886 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
5892 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
5894 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
5895 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
5899 case 0: /* Two-reg transfer. We should catch these above. */
5902 case 2: /* fldm[sdx]. */
5906 unsigned int i
, offset
= insn
& 0xff;
5911 for (i
= fd
; i
< fd
+ offset
; i
++)
5912 bfd_arm_vfp11_write_mask (destmask
, i
);
5916 case 4: /* fld[sd]. */
5918 bfd_arm_vfp11_write_mask (destmask
, fd
);
5927 /* Single-register transfer. Note L==0. */
5928 else if ((insn
& 0x0f100e10) == 0x0e000a10)
5930 unsigned int opcode
= (insn
>> 21) & 7;
5931 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
5935 case 0: /* fmsr/fmdlr. */
5936 case 1: /* fmdhr. */
5937 /* Mark fmdhr and fmdlr as writing to the whole of the DP
5938 destination register. I don't know if this is exactly right,
5939 but it is the conservative choice. */
5940 bfd_arm_vfp11_write_mask (destmask
, fn
);
5954 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
5957 /* Look for potentially-troublesome code sequences which might trigger the
5958 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
5959 (available from ARM) for details of the erratum. A short version is
5960 described in ld.texinfo. */
5963 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
5966 bfd_byte
*contents
= NULL
;
5968 int regs
[3], numregs
= 0;
5969 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
5970 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
5972 if (globals
== NULL
)
5975 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
5976 The states transition as follows:
5978 0 -> 1 (vector) or 0 -> 2 (scalar)
5979 A VFP FMAC-pipeline instruction has been seen. Fill
5980 regs[0]..regs[numregs-1] with its input operands. Remember this
5981 instruction in 'first_fmac'.
5984 Any instruction, except for a VFP instruction which overwrites
5989 A VFP instruction has been seen which overwrites any of regs[*].
5990 We must make a veneer! Reset state to 0 before examining next
5994 If we fail to match anything in state 2, reset to state 0 and reset
5995 the instruction pointer to the instruction after 'first_fmac'.
5997 If the VFP11 vector mode is in use, there must be at least two unrelated
5998 instructions between anti-dependent VFP11 instructions to properly avoid
5999 triggering the erratum, hence the use of the extra state 1. */
6001 /* If we are only performing a partial link do not bother
6002 to construct any glue. */
6003 if (link_info
->relocatable
)
6006 /* Skip if this bfd does not correspond to an ELF image. */
6007 if (! is_arm_elf (abfd
))
6010 /* We should have chosen a fix type by the time we get here. */
6011 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
6013 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
6016 /* Skip this BFD if it corresponds to an executable or dynamic object. */
6017 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
6020 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6022 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
6023 struct _arm_elf_section_data
*sec_data
;
6025 /* If we don't have executable progbits, we're not interested in this
6026 section. Also skip if section is to be excluded. */
6027 if (elf_section_type (sec
) != SHT_PROGBITS
6028 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
6029 || (sec
->flags
& SEC_EXCLUDE
) != 0
6030 || sec
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
6031 || sec
->output_section
== bfd_abs_section_ptr
6032 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
6035 sec_data
= elf32_arm_section_data (sec
);
6037 if (sec_data
->mapcount
== 0)
6040 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6041 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6042 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6045 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
6046 elf32_arm_compare_mapping
);
6048 for (span
= 0; span
< sec_data
->mapcount
; span
++)
6050 unsigned int span_start
= sec_data
->map
[span
].vma
;
6051 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
6052 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
6053 char span_type
= sec_data
->map
[span
].type
;
6055 /* FIXME: Only ARM mode is supported at present. We may need to
6056 support Thumb-2 mode also at some point. */
6057 if (span_type
!= 'a')
6060 for (i
= span_start
; i
< span_end
;)
6062 unsigned int next_i
= i
+ 4;
6063 unsigned int insn
= bfd_big_endian (abfd
)
6064 ? (contents
[i
] << 24)
6065 | (contents
[i
+ 1] << 16)
6066 | (contents
[i
+ 2] << 8)
6068 : (contents
[i
+ 3] << 24)
6069 | (contents
[i
+ 2] << 16)
6070 | (contents
[i
+ 1] << 8)
6072 unsigned int writemask
= 0;
6073 enum bfd_arm_vfp11_pipe vpipe
;
6078 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
6080 /* I'm assuming the VFP11 erratum can trigger with denorm
6081 operands on either the FMAC or the DS pipeline. This might
6082 lead to slightly overenthusiastic veneer insertion. */
6083 if (vpipe
== VFP11_FMAC
|| vpipe
== VFP11_DS
)
6085 state
= use_vector
? 1 : 2;
6087 veneer_of_insn
= insn
;
6093 int other_regs
[3], other_numregs
;
6094 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6097 if (vpipe
!= VFP11_BAD
6098 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6108 int other_regs
[3], other_numregs
;
6109 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6112 if (vpipe
!= VFP11_BAD
6113 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6119 next_i
= first_fmac
+ 4;
6125 abort (); /* Should be unreachable. */
6130 elf32_vfp11_erratum_list
*newerr
=(elf32_vfp11_erratum_list
*)
6131 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
6134 errcount
= ++(elf32_arm_section_data (sec
)->erratumcount
);
6136 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
6141 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
6148 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
6153 newerr
->next
= sec_data
->erratumlist
;
6154 sec_data
->erratumlist
= newerr
;
6163 if (contents
!= NULL
6164 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6172 if (contents
!= NULL
6173 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6179 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
6180 after sections have been laid out, using specially-named symbols. */
6183 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
6184 struct bfd_link_info
*link_info
)
6187 struct elf32_arm_link_hash_table
*globals
;
6190 if (link_info
->relocatable
)
6193 /* Skip if this bfd does not correspond to an ELF image. */
6194 if (! is_arm_elf (abfd
))
6197 globals
= elf32_arm_hash_table (link_info
);
6198 if (globals
== NULL
)
6201 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
6202 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
6204 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6206 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
6207 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
6209 for (; errnode
!= NULL
; errnode
= errnode
->next
)
6211 struct elf_link_hash_entry
*myh
;
6214 switch (errnode
->type
)
6216 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
6217 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
6218 /* Find veneer symbol. */
6219 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
6220 errnode
->u
.b
.veneer
->u
.v
.id
);
6222 myh
= elf_link_hash_lookup
6223 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6226 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6227 "`%s'"), abfd
, tmp_name
);
6229 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6230 + myh
->root
.u
.def
.section
->output_offset
6231 + myh
->root
.u
.def
.value
;
6233 errnode
->u
.b
.veneer
->vma
= vma
;
6236 case VFP11_ERRATUM_ARM_VENEER
:
6237 case VFP11_ERRATUM_THUMB_VENEER
:
6238 /* Find return location. */
6239 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
6242 myh
= elf_link_hash_lookup
6243 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6246 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6247 "`%s'"), abfd
, tmp_name
);
6249 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6250 + myh
->root
.u
.def
.section
->output_offset
6251 + myh
->root
.u
.def
.value
;
6253 errnode
->u
.v
.branch
->vma
= vma
;
6266 /* Set target relocation values needed during linking. */
6269 bfd_elf32_arm_set_target_relocs (struct bfd
*output_bfd
,
6270 struct bfd_link_info
*link_info
,
6272 char * target2_type
,
6275 bfd_arm_vfp11_fix vfp11_fix
,
6276 int no_enum_warn
, int no_wchar_warn
,
6277 int pic_veneer
, int fix_cortex_a8
)
6279 struct elf32_arm_link_hash_table
*globals
;
6281 globals
= elf32_arm_hash_table (link_info
);
6282 if (globals
== NULL
)
6285 globals
->target1_is_rel
= target1_is_rel
;
6286 if (strcmp (target2_type
, "rel") == 0)
6287 globals
->target2_reloc
= R_ARM_REL32
;
6288 else if (strcmp (target2_type
, "abs") == 0)
6289 globals
->target2_reloc
= R_ARM_ABS32
;
6290 else if (strcmp (target2_type
, "got-rel") == 0)
6291 globals
->target2_reloc
= R_ARM_GOT_PREL
;
6294 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6297 globals
->fix_v4bx
= fix_v4bx
;
6298 globals
->use_blx
|= use_blx
;
6299 globals
->vfp11_fix
= vfp11_fix
;
6300 globals
->pic_veneer
= pic_veneer
;
6301 globals
->fix_cortex_a8
= fix_cortex_a8
;
6303 BFD_ASSERT (is_arm_elf (output_bfd
));
6304 elf_arm_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
6305 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
6308 /* Replace the target offset of a Thumb bl or b.w instruction. */
6311 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
6317 BFD_ASSERT ((offset
& 1) == 0);
6319 upper
= bfd_get_16 (abfd
, insn
);
6320 lower
= bfd_get_16 (abfd
, insn
+ 2);
6321 reloc_sign
= (offset
< 0) ? 1 : 0;
6322 upper
= (upper
& ~(bfd_vma
) 0x7ff)
6323 | ((offset
>> 12) & 0x3ff)
6324 | (reloc_sign
<< 10);
6325 lower
= (lower
& ~(bfd_vma
) 0x2fff)
6326 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
6327 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
6328 | ((offset
>> 1) & 0x7ff);
6329 bfd_put_16 (abfd
, upper
, insn
);
6330 bfd_put_16 (abfd
, lower
, insn
+ 2);
6333 /* Thumb code calling an ARM function. */
6336 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
6340 asection
* input_section
,
6341 bfd_byte
* hit_data
,
6344 bfd_signed_vma addend
,
6346 char **error_message
)
6350 long int ret_offset
;
6351 struct elf_link_hash_entry
* myh
;
6352 struct elf32_arm_link_hash_table
* globals
;
6354 myh
= find_thumb_glue (info
, name
, error_message
);
6358 globals
= elf32_arm_hash_table (info
);
6359 BFD_ASSERT (globals
!= NULL
);
6360 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6362 my_offset
= myh
->root
.u
.def
.value
;
6364 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6365 THUMB2ARM_GLUE_SECTION_NAME
);
6367 BFD_ASSERT (s
!= NULL
);
6368 BFD_ASSERT (s
->contents
!= NULL
);
6369 BFD_ASSERT (s
->output_section
!= NULL
);
6371 if ((my_offset
& 0x01) == 0x01)
6374 && sym_sec
->owner
!= NULL
6375 && !INTERWORK_FLAG (sym_sec
->owner
))
6377 (*_bfd_error_handler
)
6378 (_("%B(%s): warning: interworking not enabled.\n"
6379 " first occurrence: %B: thumb call to arm"),
6380 sym_sec
->owner
, input_bfd
, name
);
6386 myh
->root
.u
.def
.value
= my_offset
;
6388 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
6389 s
->contents
+ my_offset
);
6391 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
6392 s
->contents
+ my_offset
+ 2);
6395 /* Address of destination of the stub. */
6396 ((bfd_signed_vma
) val
)
6398 /* Offset from the start of the current section
6399 to the start of the stubs. */
6401 /* Offset of the start of this stub from the start of the stubs. */
6403 /* Address of the start of the current section. */
6404 + s
->output_section
->vma
)
6405 /* The branch instruction is 4 bytes into the stub. */
6407 /* ARM branches work from the pc of the instruction + 8. */
6410 put_arm_insn (globals
, output_bfd
,
6411 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
6412 s
->contents
+ my_offset
+ 4);
6415 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
6417 /* Now go back and fix up the original BL insn to point to here. */
6419 /* Address of where the stub is located. */
6420 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
6421 /* Address of where the BL is located. */
6422 - (input_section
->output_section
->vma
+ input_section
->output_offset
6424 /* Addend in the relocation. */
6426 /* Biassing for PC-relative addressing. */
6429 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
6434 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
6436 static struct elf_link_hash_entry
*
6437 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
6444 char ** error_message
)
6447 long int ret_offset
;
6448 struct elf_link_hash_entry
* myh
;
6449 struct elf32_arm_link_hash_table
* globals
;
6451 myh
= find_arm_glue (info
, name
, error_message
);
6455 globals
= elf32_arm_hash_table (info
);
6456 BFD_ASSERT (globals
!= NULL
);
6457 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6459 my_offset
= myh
->root
.u
.def
.value
;
6461 if ((my_offset
& 0x01) == 0x01)
6464 && sym_sec
->owner
!= NULL
6465 && !INTERWORK_FLAG (sym_sec
->owner
))
6467 (*_bfd_error_handler
)
6468 (_("%B(%s): warning: interworking not enabled.\n"
6469 " first occurrence: %B: arm call to thumb"),
6470 sym_sec
->owner
, input_bfd
, name
);
6474 myh
->root
.u
.def
.value
= my_offset
;
6476 if (info
->shared
|| globals
->root
.is_relocatable_executable
6477 || globals
->pic_veneer
)
6479 /* For relocatable objects we can't use absolute addresses,
6480 so construct the address from a relative offset. */
6481 /* TODO: If the offset is small it's probably worth
6482 constructing the address with adds. */
6483 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
6484 s
->contents
+ my_offset
);
6485 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
6486 s
->contents
+ my_offset
+ 4);
6487 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
6488 s
->contents
+ my_offset
+ 8);
6489 /* Adjust the offset by 4 for the position of the add,
6490 and 8 for the pipeline offset. */
6491 ret_offset
= (val
- (s
->output_offset
6492 + s
->output_section
->vma
6495 bfd_put_32 (output_bfd
, ret_offset
,
6496 s
->contents
+ my_offset
+ 12);
6498 else if (globals
->use_blx
)
6500 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
6501 s
->contents
+ my_offset
);
6503 /* It's a thumb address. Add the low order bit. */
6504 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
6505 s
->contents
+ my_offset
+ 4);
6509 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
6510 s
->contents
+ my_offset
);
6512 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
6513 s
->contents
+ my_offset
+ 4);
6515 /* It's a thumb address. Add the low order bit. */
6516 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
6517 s
->contents
+ my_offset
+ 8);
6523 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
6528 /* Arm code calling a Thumb function. */
6531 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
6535 asection
* input_section
,
6536 bfd_byte
* hit_data
,
6539 bfd_signed_vma addend
,
6541 char **error_message
)
6543 unsigned long int tmp
;
6546 long int ret_offset
;
6547 struct elf_link_hash_entry
* myh
;
6548 struct elf32_arm_link_hash_table
* globals
;
6550 globals
= elf32_arm_hash_table (info
);
6551 BFD_ASSERT (globals
!= NULL
);
6552 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6554 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6555 ARM2THUMB_GLUE_SECTION_NAME
);
6556 BFD_ASSERT (s
!= NULL
);
6557 BFD_ASSERT (s
->contents
!= NULL
);
6558 BFD_ASSERT (s
->output_section
!= NULL
);
6560 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
6561 sym_sec
, val
, s
, error_message
);
6565 my_offset
= myh
->root
.u
.def
.value
;
6566 tmp
= bfd_get_32 (input_bfd
, hit_data
);
6567 tmp
= tmp
& 0xFF000000;
6569 /* Somehow these are both 4 too far, so subtract 8. */
6570 ret_offset
= (s
->output_offset
6572 + s
->output_section
->vma
6573 - (input_section
->output_offset
6574 + input_section
->output_section
->vma
6578 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
6580 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
6585 /* Populate Arm stub for an exported Thumb function. */
6588 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
6590 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
6592 struct elf_link_hash_entry
* myh
;
6593 struct elf32_arm_link_hash_entry
*eh
;
6594 struct elf32_arm_link_hash_table
* globals
;
6597 char *error_message
;
6599 eh
= elf32_arm_hash_entry (h
);
6600 /* Allocate stubs for exported Thumb functions on v4t. */
6601 if (eh
->export_glue
== NULL
)
6604 globals
= elf32_arm_hash_table (info
);
6605 BFD_ASSERT (globals
!= NULL
);
6606 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6608 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6609 ARM2THUMB_GLUE_SECTION_NAME
);
6610 BFD_ASSERT (s
!= NULL
);
6611 BFD_ASSERT (s
->contents
!= NULL
);
6612 BFD_ASSERT (s
->output_section
!= NULL
);
6614 sec
= eh
->export_glue
->root
.u
.def
.section
;
6616 BFD_ASSERT (sec
->output_section
!= NULL
);
6618 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
6619 + sec
->output_section
->vma
;
6621 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
6622 h
->root
.u
.def
.section
->owner
,
6623 globals
->obfd
, sec
, val
, s
,
6629 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
6632 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
6637 struct elf32_arm_link_hash_table
*globals
;
6639 globals
= elf32_arm_hash_table (info
);
6640 BFD_ASSERT (globals
!= NULL
);
6641 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6643 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6644 ARM_BX_GLUE_SECTION_NAME
);
6645 BFD_ASSERT (s
!= NULL
);
6646 BFD_ASSERT (s
->contents
!= NULL
);
6647 BFD_ASSERT (s
->output_section
!= NULL
);
6649 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
6651 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
6653 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
6655 p
= s
->contents
+ glue_addr
;
6656 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
6657 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
6658 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
6659 globals
->bx_glue_offset
[reg
] |= 1;
6662 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
6665 /* Generate Arm stubs for exported Thumb symbols. */
6667 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
6668 struct bfd_link_info
*link_info
)
6670 struct elf32_arm_link_hash_table
* globals
;
6672 if (link_info
== NULL
)
6673 /* Ignore this if we are not called by the ELF backend linker. */
6676 globals
= elf32_arm_hash_table (link_info
);
6677 if (globals
== NULL
)
6680 /* If blx is available then exported Thumb symbols are OK and there is
6682 if (globals
->use_blx
)
6685 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
6689 /* Some relocations map to different relocations depending on the
6690 target. Return the real relocation. */
6693 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
6699 if (globals
->target1_is_rel
)
6705 return globals
->target2_reloc
;
6712 /* Return the base VMA address which should be subtracted from real addresses
6713 when resolving @dtpoff relocation.
6714 This is PT_TLS segment p_vaddr. */
6717 dtpoff_base (struct bfd_link_info
*info
)
6719 /* If tls_sec is NULL, we should have signalled an error already. */
6720 if (elf_hash_table (info
)->tls_sec
== NULL
)
6722 return elf_hash_table (info
)->tls_sec
->vma
;
6725 /* Return the relocation value for @tpoff relocation
6726 if STT_TLS virtual address is ADDRESS. */
6729 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
6731 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
6734 /* If tls_sec is NULL, we should have signalled an error already. */
6735 if (htab
->tls_sec
== NULL
)
6737 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
6738 return address
- htab
->tls_sec
->vma
+ base
;
6741 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
6742 VALUE is the relocation value. */
6744 static bfd_reloc_status_type
6745 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
6748 return bfd_reloc_overflow
;
6750 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
6751 bfd_put_32 (abfd
, value
, data
);
6752 return bfd_reloc_ok
;
6755 /* For a given value of n, calculate the value of G_n as required to
6756 deal with group relocations. We return it in the form of an
6757 encoded constant-and-rotation, together with the final residual. If n is
6758 specified as less than zero, then final_residual is filled with the
6759 input value and no further action is performed. */
6762 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
6766 bfd_vma encoded_g_n
= 0;
6767 bfd_vma residual
= value
; /* Also known as Y_n. */
6769 for (current_n
= 0; current_n
<= n
; current_n
++)
6773 /* Calculate which part of the value to mask. */
6780 /* Determine the most significant bit in the residual and
6781 align the resulting value to a 2-bit boundary. */
6782 for (msb
= 30; msb
>= 0; msb
-= 2)
6783 if (residual
& (3 << msb
))
6786 /* The desired shift is now (msb - 6), or zero, whichever
6793 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
6794 g_n
= residual
& (0xff << shift
);
6795 encoded_g_n
= (g_n
>> shift
)
6796 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
6798 /* Calculate the residual for the next time around. */
6802 *final_residual
= residual
;
6807 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
6808 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
6811 identify_add_or_sub (bfd_vma insn
)
6813 int opcode
= insn
& 0x1e00000;
6815 if (opcode
== 1 << 23) /* ADD */
6818 if (opcode
== 1 << 22) /* SUB */
6824 /* Perform a relocation as part of a final link. */
6826 static bfd_reloc_status_type
6827 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
6830 asection
* input_section
,
6831 bfd_byte
* contents
,
6832 Elf_Internal_Rela
* rel
,
6834 struct bfd_link_info
* info
,
6836 const char * sym_name
,
6838 struct elf_link_hash_entry
* h
,
6839 bfd_boolean
* unresolved_reloc_p
,
6840 char ** error_message
)
6842 unsigned long r_type
= howto
->type
;
6843 unsigned long r_symndx
;
6844 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
6845 bfd
* dynobj
= NULL
;
6846 Elf_Internal_Shdr
* symtab_hdr
;
6847 struct elf_link_hash_entry
** sym_hashes
;
6848 bfd_vma
* local_got_offsets
;
6849 asection
* sgot
= NULL
;
6850 asection
* splt
= NULL
;
6851 asection
* sreloc
= NULL
;
6853 bfd_signed_vma signed_addend
;
6854 struct elf32_arm_link_hash_table
* globals
;
6856 globals
= elf32_arm_hash_table (info
);
6857 if (globals
== NULL
)
6858 return bfd_reloc_notsupported
;
6860 BFD_ASSERT (is_arm_elf (input_bfd
));
6862 /* Some relocation types map to different relocations depending on the
6863 target. We pick the right one here. */
6864 r_type
= arm_real_reloc_type (globals
, r_type
);
6865 if (r_type
!= howto
->type
)
6866 howto
= elf32_arm_howto_from_type (r_type
);
6868 /* If the start address has been set, then set the EF_ARM_HASENTRY
6869 flag. Setting this more than once is redundant, but the cost is
6870 not too high, and it keeps the code simple.
6872 The test is done here, rather than somewhere else, because the
6873 start address is only set just before the final link commences.
6875 Note - if the user deliberately sets a start address of 0, the
6876 flag will not be set. */
6877 if (bfd_get_start_address (output_bfd
) != 0)
6878 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
6880 dynobj
= elf_hash_table (info
)->dynobj
;
6883 sgot
= bfd_get_section_by_name (dynobj
, ".got");
6884 splt
= bfd_get_section_by_name (dynobj
, ".plt");
6886 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
6887 sym_hashes
= elf_sym_hashes (input_bfd
);
6888 local_got_offsets
= elf_local_got_offsets (input_bfd
);
6889 r_symndx
= ELF32_R_SYM (rel
->r_info
);
6891 if (globals
->use_rel
)
6893 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
6895 if (addend
& ((howto
->src_mask
+ 1) >> 1))
6898 signed_addend
&= ~ howto
->src_mask
;
6899 signed_addend
|= addend
;
6902 signed_addend
= addend
;
6905 addend
= signed_addend
= rel
->r_addend
;
6910 /* We don't need to find a value for this symbol. It's just a
6912 *unresolved_reloc_p
= FALSE
;
6913 return bfd_reloc_ok
;
6916 if (!globals
->vxworks_p
)
6917 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
6921 case R_ARM_ABS32_NOI
:
6923 case R_ARM_REL32_NOI
:
6929 /* Handle relocations which should use the PLT entry. ABS32/REL32
6930 will use the symbol's value, which may point to a PLT entry, but we
6931 don't need to handle that here. If we created a PLT entry, all
6932 branches in this object should go to it, except if the PLT is too
6933 far away, in which case a long branch stub should be inserted. */
6934 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
6935 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
6936 && r_type
!= R_ARM_CALL
6937 && r_type
!= R_ARM_JUMP24
6938 && r_type
!= R_ARM_PLT32
)
6941 && h
->plt
.offset
!= (bfd_vma
) -1)
6943 /* If we've created a .plt section, and assigned a PLT entry to
6944 this function, it should not be known to bind locally. If
6945 it were, we would have cleared the PLT entry. */
6946 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info
, h
));
6948 value
= (splt
->output_section
->vma
6949 + splt
->output_offset
6951 *unresolved_reloc_p
= FALSE
;
6952 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
6953 contents
, rel
->r_offset
, value
,
6957 /* When generating a shared object or relocatable executable, these
6958 relocations are copied into the output file to be resolved at
6960 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
6961 && (input_section
->flags
& SEC_ALLOC
)
6962 && !(globals
->vxworks_p
6963 && strcmp (input_section
->output_section
->name
,
6965 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
6966 || !SYMBOL_CALLS_LOCAL (info
, h
))
6967 && (!strstr (input_section
->name
, STUB_SUFFIX
))
6969 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6970 || h
->root
.type
!= bfd_link_hash_undefweak
)
6971 && r_type
!= R_ARM_PC24
6972 && r_type
!= R_ARM_CALL
6973 && r_type
!= R_ARM_JUMP24
6974 && r_type
!= R_ARM_PREL31
6975 && r_type
!= R_ARM_PLT32
)
6977 Elf_Internal_Rela outrel
;
6979 bfd_boolean skip
, relocate
;
6981 *unresolved_reloc_p
= FALSE
;
6985 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
6986 ! globals
->use_rel
);
6989 return bfd_reloc_notsupported
;
6995 outrel
.r_addend
= addend
;
6997 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
6999 if (outrel
.r_offset
== (bfd_vma
) -1)
7001 else if (outrel
.r_offset
== (bfd_vma
) -2)
7002 skip
= TRUE
, relocate
= TRUE
;
7003 outrel
.r_offset
+= (input_section
->output_section
->vma
7004 + input_section
->output_offset
);
7007 memset (&outrel
, 0, sizeof outrel
);
7012 || !h
->def_regular
))
7013 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
7018 /* This symbol is local, or marked to become local. */
7019 if (sym_flags
== STT_ARM_TFUNC
)
7021 if (globals
->symbian_p
)
7025 /* On Symbian OS, the data segment and text segement
7026 can be relocated independently. Therefore, we
7027 must indicate the segment to which this
7028 relocation is relative. The BPABI allows us to
7029 use any symbol in the right segment; we just use
7030 the section symbol as it is convenient. (We
7031 cannot use the symbol given by "h" directly as it
7032 will not appear in the dynamic symbol table.)
7034 Note that the dynamic linker ignores the section
7035 symbol value, so we don't subtract osec->vma
7036 from the emitted reloc addend. */
7038 osec
= sym_sec
->output_section
;
7040 osec
= input_section
->output_section
;
7041 symbol
= elf_section_data (osec
)->dynindx
;
7044 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7046 if ((osec
->flags
& SEC_READONLY
) == 0
7047 && htab
->data_index_section
!= NULL
)
7048 osec
= htab
->data_index_section
;
7050 osec
= htab
->text_index_section
;
7051 symbol
= elf_section_data (osec
)->dynindx
;
7053 BFD_ASSERT (symbol
!= 0);
7056 /* On SVR4-ish systems, the dynamic loader cannot
7057 relocate the text and data segments independently,
7058 so the symbol does not matter. */
7060 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
7061 if (globals
->use_rel
)
7064 outrel
.r_addend
+= value
;
7067 loc
= sreloc
->contents
;
7068 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
7069 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7071 /* If this reloc is against an external symbol, we do not want to
7072 fiddle with the addend. Otherwise, we need to include the symbol
7073 value so that it becomes an addend for the dynamic reloc. */
7075 return bfd_reloc_ok
;
7077 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7078 contents
, rel
->r_offset
, value
,
7081 else switch (r_type
)
7084 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
7086 case R_ARM_XPC25
: /* Arm BLX instruction. */
7089 case R_ARM_PC24
: /* Arm B/BL instruction. */
7092 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
7094 if (r_type
== R_ARM_XPC25
)
7096 /* Check for Arm calling Arm function. */
7097 /* FIXME: Should we translate the instruction into a BL
7098 instruction instead ? */
7099 if (sym_flags
!= STT_ARM_TFUNC
)
7100 (*_bfd_error_handler
)
7101 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
7103 h
? h
->root
.root
.string
: "(local)");
7105 else if (r_type
== R_ARM_PC24
)
7107 /* Check for Arm calling Thumb function. */
7108 if (sym_flags
== STT_ARM_TFUNC
)
7110 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
7111 output_bfd
, input_section
,
7112 hit_data
, sym_sec
, rel
->r_offset
,
7113 signed_addend
, value
,
7115 return bfd_reloc_ok
;
7117 return bfd_reloc_dangerous
;
7121 /* Check if a stub has to be inserted because the
7122 destination is too far or we are changing mode. */
7123 if ( r_type
== R_ARM_CALL
7124 || r_type
== R_ARM_JUMP24
7125 || r_type
== R_ARM_PLT32
)
7127 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
7128 struct elf32_arm_link_hash_entry
*hash
;
7130 hash
= (struct elf32_arm_link_hash_entry
*) h
;
7131 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
7134 input_bfd
, sym_name
);
7136 if (stub_type
!= arm_stub_none
)
7138 /* The target is out of reach, so redirect the
7139 branch to the local stub for this function. */
7141 stub_entry
= elf32_arm_get_stub_entry (input_section
,
7145 if (stub_entry
!= NULL
)
7146 value
= (stub_entry
->stub_offset
7147 + stub_entry
->stub_sec
->output_offset
7148 + stub_entry
->stub_sec
->output_section
->vma
);
7152 /* If the call goes through a PLT entry, make sure to
7153 check distance to the right destination address. */
7156 && h
->plt
.offset
!= (bfd_vma
) -1)
7158 value
= (splt
->output_section
->vma
7159 + splt
->output_offset
7161 *unresolved_reloc_p
= FALSE
;
7162 /* The PLT entry is in ARM mode, regardless of the
7164 sym_flags
= STT_FUNC
;
7169 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
7171 S is the address of the symbol in the relocation.
7172 P is address of the instruction being relocated.
7173 A is the addend (extracted from the instruction) in bytes.
7175 S is held in 'value'.
7176 P is the base address of the section containing the
7177 instruction plus the offset of the reloc into that
7179 (input_section->output_section->vma +
7180 input_section->output_offset +
7182 A is the addend, converted into bytes, ie:
7185 Note: None of these operations have knowledge of the pipeline
7186 size of the processor, thus it is up to the assembler to
7187 encode this information into the addend. */
7188 value
-= (input_section
->output_section
->vma
7189 + input_section
->output_offset
);
7190 value
-= rel
->r_offset
;
7191 if (globals
->use_rel
)
7192 value
+= (signed_addend
<< howto
->size
);
7194 /* RELA addends do not have to be adjusted by howto->size. */
7195 value
+= signed_addend
;
7197 signed_addend
= value
;
7198 signed_addend
>>= howto
->rightshift
;
7200 /* A branch to an undefined weak symbol is turned into a jump to
7201 the next instruction unless a PLT entry will be created.
7202 Do the same for local undefined symbols.
7203 The jump to the next instruction is optimized as a NOP depending
7204 on the architecture. */
7205 if (h
? (h
->root
.type
== bfd_link_hash_undefweak
7206 && !(splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1))
7207 : bfd_is_und_section (sym_sec
))
7209 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000);
7211 if (arch_has_arm_nop (globals
))
7212 value
|= 0x0320f000;
7214 value
|= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
7218 /* Perform a signed range check. */
7219 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
7220 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
7221 return bfd_reloc_overflow
;
7223 addend
= (value
& 2);
7225 value
= (signed_addend
& howto
->dst_mask
)
7226 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
7228 if (r_type
== R_ARM_CALL
)
7230 /* Set the H bit in the BLX instruction. */
7231 if (sym_flags
== STT_ARM_TFUNC
)
7236 value
&= ~(bfd_vma
)(1 << 24);
7239 /* Select the correct instruction (BL or BLX). */
7240 /* Only if we are not handling a BL to a stub. In this
7241 case, mode switching is performed by the stub. */
7242 if (sym_flags
== STT_ARM_TFUNC
&& !stub_entry
)
7246 value
&= ~(bfd_vma
)(1 << 28);
7256 if (sym_flags
== STT_ARM_TFUNC
)
7260 case R_ARM_ABS32_NOI
:
7266 if (sym_flags
== STT_ARM_TFUNC
)
7268 value
-= (input_section
->output_section
->vma
7269 + input_section
->output_offset
+ rel
->r_offset
);
7272 case R_ARM_REL32_NOI
:
7274 value
-= (input_section
->output_section
->vma
7275 + input_section
->output_offset
+ rel
->r_offset
);
7279 value
-= (input_section
->output_section
->vma
7280 + input_section
->output_offset
+ rel
->r_offset
);
7281 value
+= signed_addend
;
7282 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
7284 /* Check for overflow. */
7285 if ((value
^ (value
>> 1)) & (1 << 30))
7286 return bfd_reloc_overflow
;
7288 value
&= 0x7fffffff;
7289 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
7290 if (sym_flags
== STT_ARM_TFUNC
)
7295 bfd_put_32 (input_bfd
, value
, hit_data
);
7296 return bfd_reloc_ok
;
7301 /* There is no way to tell whether the user intended to use a signed or
7302 unsigned addend. When checking for overflow we accept either,
7303 as specified by the AAELF. */
7304 if ((long) value
> 0xff || (long) value
< -0x80)
7305 return bfd_reloc_overflow
;
7307 bfd_put_8 (input_bfd
, value
, hit_data
);
7308 return bfd_reloc_ok
;
7313 /* See comment for R_ARM_ABS8. */
7314 if ((long) value
> 0xffff || (long) value
< -0x8000)
7315 return bfd_reloc_overflow
;
7317 bfd_put_16 (input_bfd
, value
, hit_data
);
7318 return bfd_reloc_ok
;
7320 case R_ARM_THM_ABS5
:
7321 /* Support ldr and str instructions for the thumb. */
7322 if (globals
->use_rel
)
7324 /* Need to refetch addend. */
7325 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
7326 /* ??? Need to determine shift amount from operand size. */
7327 addend
>>= howto
->rightshift
;
7331 /* ??? Isn't value unsigned? */
7332 if ((long) value
> 0x1f || (long) value
< -0x10)
7333 return bfd_reloc_overflow
;
7335 /* ??? Value needs to be properly shifted into place first. */
7336 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
7337 bfd_put_16 (input_bfd
, value
, hit_data
);
7338 return bfd_reloc_ok
;
7340 case R_ARM_THM_ALU_PREL_11_0
:
7341 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
7344 bfd_signed_vma relocation
;
7346 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
7347 | bfd_get_16 (input_bfd
, hit_data
+ 2);
7349 if (globals
->use_rel
)
7351 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
7352 | ((insn
& (1 << 26)) >> 15);
7353 if (insn
& 0xf00000)
7354 signed_addend
= -signed_addend
;
7357 relocation
= value
+ signed_addend
;
7358 relocation
-= (input_section
->output_section
->vma
7359 + input_section
->output_offset
7362 value
= abs (relocation
);
7364 if (value
>= 0x1000)
7365 return bfd_reloc_overflow
;
7367 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
7368 | ((value
& 0x700) << 4)
7369 | ((value
& 0x800) << 15);
7373 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
7374 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
7376 return bfd_reloc_ok
;
7380 /* PR 10073: This reloc is not generated by the GNU toolchain,
7381 but it is supported for compatibility with third party libraries
7382 generated by other compilers, specifically the ARM/IAR. */
7385 bfd_signed_vma relocation
;
7387 insn
= bfd_get_16 (input_bfd
, hit_data
);
7389 if (globals
->use_rel
)
7390 addend
= (insn
& 0x00ff) << 2;
7392 relocation
= value
+ addend
;
7393 relocation
-= (input_section
->output_section
->vma
7394 + input_section
->output_offset
7397 value
= abs (relocation
);
7399 /* We do not check for overflow of this reloc. Although strictly
7400 speaking this is incorrect, it appears to be necessary in order
7401 to work with IAR generated relocs. Since GCC and GAS do not
7402 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
7403 a problem for them. */
7406 insn
= (insn
& 0xff00) | (value
>> 2);
7408 bfd_put_16 (input_bfd
, insn
, hit_data
);
7410 return bfd_reloc_ok
;
7413 case R_ARM_THM_PC12
:
7414 /* Corresponds to: ldr.w reg, [pc, #offset]. */
7417 bfd_signed_vma relocation
;
7419 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
7420 | bfd_get_16 (input_bfd
, hit_data
+ 2);
7422 if (globals
->use_rel
)
7424 signed_addend
= insn
& 0xfff;
7425 if (!(insn
& (1 << 23)))
7426 signed_addend
= -signed_addend
;
7429 relocation
= value
+ signed_addend
;
7430 relocation
-= (input_section
->output_section
->vma
7431 + input_section
->output_offset
7434 value
= abs (relocation
);
7436 if (value
>= 0x1000)
7437 return bfd_reloc_overflow
;
7439 insn
= (insn
& 0xff7ff000) | value
;
7440 if (relocation
>= 0)
7443 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
7444 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
7446 return bfd_reloc_ok
;
7449 case R_ARM_THM_XPC22
:
7450 case R_ARM_THM_CALL
:
7451 case R_ARM_THM_JUMP24
:
7452 /* Thumb BL (branch long instruction). */
7456 bfd_boolean overflow
= FALSE
;
7457 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
7458 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
7459 bfd_signed_vma reloc_signed_max
;
7460 bfd_signed_vma reloc_signed_min
;
7462 bfd_signed_vma signed_check
;
7464 const int thumb2
= using_thumb2 (globals
);
7466 /* A branch to an undefined weak symbol is turned into a jump to
7467 the next instruction unless a PLT entry will be created.
7468 The jump to the next instruction is optimized as a NOP.W for
7469 Thumb-2 enabled architectures. */
7470 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
7471 && !(splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1))
7473 if (arch_has_thumb2_nop (globals
))
7475 bfd_put_16 (input_bfd
, 0xf3af, hit_data
);
7476 bfd_put_16 (input_bfd
, 0x8000, hit_data
+ 2);
7480 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
7481 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
7483 return bfd_reloc_ok
;
7486 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
7487 with Thumb-1) involving the J1 and J2 bits. */
7488 if (globals
->use_rel
)
7490 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
7491 bfd_vma upper
= upper_insn
& 0x3ff;
7492 bfd_vma lower
= lower_insn
& 0x7ff;
7493 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
7494 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
7495 bfd_vma i1
= j1
^ s
? 0 : 1;
7496 bfd_vma i2
= j2
^ s
? 0 : 1;
7498 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
7500 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
7502 signed_addend
= addend
;
7505 if (r_type
== R_ARM_THM_XPC22
)
7507 /* Check for Thumb to Thumb call. */
7508 /* FIXME: Should we translate the instruction into a BL
7509 instruction instead ? */
7510 if (sym_flags
== STT_ARM_TFUNC
)
7511 (*_bfd_error_handler
)
7512 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
7514 h
? h
->root
.root
.string
: "(local)");
7518 /* If it is not a call to Thumb, assume call to Arm.
7519 If it is a call relative to a section name, then it is not a
7520 function call at all, but rather a long jump. Calls through
7521 the PLT do not require stubs. */
7522 if (sym_flags
!= STT_ARM_TFUNC
&& sym_flags
!= STT_SECTION
7523 && (h
== NULL
|| splt
== NULL
7524 || h
->plt
.offset
== (bfd_vma
) -1))
7526 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
7528 /* Convert BL to BLX. */
7529 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7531 else if (( r_type
!= R_ARM_THM_CALL
)
7532 && (r_type
!= R_ARM_THM_JUMP24
))
7534 if (elf32_thumb_to_arm_stub
7535 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
7536 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
7538 return bfd_reloc_ok
;
7540 return bfd_reloc_dangerous
;
7543 else if (sym_flags
== STT_ARM_TFUNC
&& globals
->use_blx
7544 && r_type
== R_ARM_THM_CALL
)
7546 /* Make sure this is a BL. */
7547 lower_insn
|= 0x1800;
7551 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
7552 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
7554 /* Check if a stub has to be inserted because the destination
7556 struct elf32_arm_stub_hash_entry
*stub_entry
;
7557 struct elf32_arm_link_hash_entry
*hash
;
7559 hash
= (struct elf32_arm_link_hash_entry
*) h
;
7561 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
7562 &sym_flags
, hash
, value
, sym_sec
,
7563 input_bfd
, sym_name
);
7565 if (stub_type
!= arm_stub_none
)
7567 /* The target is out of reach or we are changing modes, so
7568 redirect the branch to the local stub for this
7570 stub_entry
= elf32_arm_get_stub_entry (input_section
,
7574 if (stub_entry
!= NULL
)
7575 value
= (stub_entry
->stub_offset
7576 + stub_entry
->stub_sec
->output_offset
7577 + stub_entry
->stub_sec
->output_section
->vma
);
7579 /* If this call becomes a call to Arm, force BLX. */
7580 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
7583 && !arm_stub_is_thumb (stub_entry
->stub_type
))
7584 || (sym_flags
!= STT_ARM_TFUNC
))
7585 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7590 /* Handle calls via the PLT. */
7591 if (stub_type
== arm_stub_none
7594 && h
->plt
.offset
!= (bfd_vma
) -1)
7596 value
= (splt
->output_section
->vma
7597 + splt
->output_offset
7600 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
7602 /* If the Thumb BLX instruction is available, convert
7603 the BL to a BLX instruction to call the ARM-mode
7605 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
7606 sym_flags
= STT_FUNC
;
7610 /* Target the Thumb stub before the ARM PLT entry. */
7611 value
-= PLT_THUMB_STUB_SIZE
;
7612 sym_flags
= STT_ARM_TFUNC
;
7614 *unresolved_reloc_p
= FALSE
;
7617 relocation
= value
+ signed_addend
;
7619 relocation
-= (input_section
->output_section
->vma
7620 + input_section
->output_offset
7623 check
= relocation
>> howto
->rightshift
;
7625 /* If this is a signed value, the rightshift just dropped
7626 leading 1 bits (assuming twos complement). */
7627 if ((bfd_signed_vma
) relocation
>= 0)
7628 signed_check
= check
;
7630 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
7632 /* Calculate the permissable maximum and minimum values for
7633 this relocation according to whether we're relocating for
7635 bitsize
= howto
->bitsize
;
7638 reloc_signed_max
= (1 << (bitsize
- 1)) - 1;
7639 reloc_signed_min
= ~reloc_signed_max
;
7641 /* Assumes two's complement. */
7642 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7645 if ((lower_insn
& 0x5000) == 0x4000)
7646 /* For a BLX instruction, make sure that the relocation is rounded up
7647 to a word boundary. This follows the semantics of the instruction
7648 which specifies that bit 1 of the target address will come from bit
7649 1 of the base address. */
7650 relocation
= (relocation
+ 2) & ~ 3;
7652 /* Put RELOCATION back into the insn. Assumes two's complement.
7653 We use the Thumb-2 encoding, which is safe even if dealing with
7654 a Thumb-1 instruction by virtue of our overflow check above. */
7655 reloc_sign
= (signed_check
< 0) ? 1 : 0;
7656 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
7657 | ((relocation
>> 12) & 0x3ff)
7658 | (reloc_sign
<< 10);
7659 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
7660 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
7661 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
7662 | ((relocation
>> 1) & 0x7ff);
7664 /* Put the relocated value back in the object file: */
7665 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
7666 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
7668 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
7672 case R_ARM_THM_JUMP19
:
7673 /* Thumb32 conditional branch instruction. */
7676 bfd_boolean overflow
= FALSE
;
7677 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
7678 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
7679 bfd_signed_vma reloc_signed_max
= 0xffffe;
7680 bfd_signed_vma reloc_signed_min
= -0x100000;
7681 bfd_signed_vma signed_check
;
7683 /* Need to refetch the addend, reconstruct the top three bits,
7684 and squish the two 11 bit pieces together. */
7685 if (globals
->use_rel
)
7687 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
7688 bfd_vma upper
= (upper_insn
& 0x003f);
7689 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
7690 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
7691 bfd_vma lower
= (lower_insn
& 0x07ff);
7696 upper
-= 0x0100; /* Sign extend. */
7698 addend
= (upper
<< 12) | (lower
<< 1);
7699 signed_addend
= addend
;
7702 /* Handle calls via the PLT. */
7703 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
7705 value
= (splt
->output_section
->vma
7706 + splt
->output_offset
7708 /* Target the Thumb stub before the ARM PLT entry. */
7709 value
-= PLT_THUMB_STUB_SIZE
;
7710 *unresolved_reloc_p
= FALSE
;
7713 /* ??? Should handle interworking? GCC might someday try to
7714 use this for tail calls. */
7716 relocation
= value
+ signed_addend
;
7717 relocation
-= (input_section
->output_section
->vma
7718 + input_section
->output_offset
7720 signed_check
= (bfd_signed_vma
) relocation
;
7722 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7725 /* Put RELOCATION back into the insn. */
7727 bfd_vma S
= (relocation
& 0x00100000) >> 20;
7728 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
7729 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
7730 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
7731 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
7733 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
7734 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
7737 /* Put the relocated value back in the object file: */
7738 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
7739 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
7741 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
7744 case R_ARM_THM_JUMP11
:
7745 case R_ARM_THM_JUMP8
:
7746 case R_ARM_THM_JUMP6
:
7747 /* Thumb B (branch) instruction). */
7749 bfd_signed_vma relocation
;
7750 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
7751 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
7752 bfd_signed_vma signed_check
;
7754 /* CZB cannot jump backward. */
7755 if (r_type
== R_ARM_THM_JUMP6
)
7756 reloc_signed_min
= 0;
7758 if (globals
->use_rel
)
7760 /* Need to refetch addend. */
7761 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
7762 if (addend
& ((howto
->src_mask
+ 1) >> 1))
7765 signed_addend
&= ~ howto
->src_mask
;
7766 signed_addend
|= addend
;
7769 signed_addend
= addend
;
7770 /* The value in the insn has been right shifted. We need to
7771 undo this, so that we can perform the address calculation
7772 in terms of bytes. */
7773 signed_addend
<<= howto
->rightshift
;
7775 relocation
= value
+ signed_addend
;
7777 relocation
-= (input_section
->output_section
->vma
7778 + input_section
->output_offset
7781 relocation
>>= howto
->rightshift
;
7782 signed_check
= relocation
;
7784 if (r_type
== R_ARM_THM_JUMP6
)
7785 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
7787 relocation
&= howto
->dst_mask
;
7788 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
7790 bfd_put_16 (input_bfd
, relocation
, hit_data
);
7792 /* Assumes two's complement. */
7793 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
7794 return bfd_reloc_overflow
;
7796 return bfd_reloc_ok
;
7799 case R_ARM_ALU_PCREL7_0
:
7800 case R_ARM_ALU_PCREL15_8
:
7801 case R_ARM_ALU_PCREL23_15
:
7806 insn
= bfd_get_32 (input_bfd
, hit_data
);
7807 if (globals
->use_rel
)
7809 /* Extract the addend. */
7810 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
7811 signed_addend
= addend
;
7813 relocation
= value
+ signed_addend
;
7815 relocation
-= (input_section
->output_section
->vma
7816 + input_section
->output_offset
7818 insn
= (insn
& ~0xfff)
7819 | ((howto
->bitpos
<< 7) & 0xf00)
7820 | ((relocation
>> howto
->bitpos
) & 0xff);
7821 bfd_put_32 (input_bfd
, value
, hit_data
);
7823 return bfd_reloc_ok
;
7825 case R_ARM_GNU_VTINHERIT
:
7826 case R_ARM_GNU_VTENTRY
:
7827 return bfd_reloc_ok
;
7829 case R_ARM_GOTOFF32
:
7830 /* Relocation is relative to the start of the
7831 global offset table. */
7833 BFD_ASSERT (sgot
!= NULL
);
7835 return bfd_reloc_notsupported
;
7837 /* If we are addressing a Thumb function, we need to adjust the
7838 address by one, so that attempts to call the function pointer will
7839 correctly interpret it as Thumb code. */
7840 if (sym_flags
== STT_ARM_TFUNC
)
7843 /* Note that sgot->output_offset is not involved in this
7844 calculation. We always want the start of .got. If we
7845 define _GLOBAL_OFFSET_TABLE in a different way, as is
7846 permitted by the ABI, we might have to change this
7848 value
-= sgot
->output_section
->vma
;
7849 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7850 contents
, rel
->r_offset
, value
,
7854 /* Use global offset table as symbol value. */
7855 BFD_ASSERT (sgot
!= NULL
);
7858 return bfd_reloc_notsupported
;
7860 *unresolved_reloc_p
= FALSE
;
7861 value
= sgot
->output_section
->vma
;
7862 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7863 contents
, rel
->r_offset
, value
,
7867 case R_ARM_GOT_PREL
:
7868 /* Relocation is to the entry for this symbol in the
7869 global offset table. */
7871 return bfd_reloc_notsupported
;
7878 off
= h
->got
.offset
;
7879 BFD_ASSERT (off
!= (bfd_vma
) -1);
7880 dyn
= globals
->root
.dynamic_sections_created
;
7882 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
7884 && SYMBOL_REFERENCES_LOCAL (info
, h
))
7885 || (ELF_ST_VISIBILITY (h
->other
)
7886 && h
->root
.type
== bfd_link_hash_undefweak
))
7888 /* This is actually a static link, or it is a -Bsymbolic link
7889 and the symbol is defined locally. We must initialize this
7890 entry in the global offset table. Since the offset must
7891 always be a multiple of 4, we use the least significant bit
7892 to record whether we have initialized it already.
7894 When doing a dynamic link, we create a .rel(a).got relocation
7895 entry to initialize the value. This is done in the
7896 finish_dynamic_symbol routine. */
7901 /* If we are addressing a Thumb function, we need to
7902 adjust the address by one, so that attempts to
7903 call the function pointer will correctly
7904 interpret it as Thumb code. */
7905 if (sym_flags
== STT_ARM_TFUNC
)
7908 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
7913 *unresolved_reloc_p
= FALSE
;
7915 value
= sgot
->output_offset
+ off
;
7921 BFD_ASSERT (local_got_offsets
!= NULL
&&
7922 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
7924 off
= local_got_offsets
[r_symndx
];
7926 /* The offset must always be a multiple of 4. We use the
7927 least significant bit to record whether we have already
7928 generated the necessary reloc. */
7933 /* If we are addressing a Thumb function, we need to
7934 adjust the address by one, so that attempts to
7935 call the function pointer will correctly
7936 interpret it as Thumb code. */
7937 if (sym_flags
== STT_ARM_TFUNC
)
7940 if (globals
->use_rel
)
7941 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
7946 Elf_Internal_Rela outrel
;
7949 srelgot
= (bfd_get_section_by_name
7950 (dynobj
, RELOC_SECTION (globals
, ".got")));
7951 BFD_ASSERT (srelgot
!= NULL
);
7953 outrel
.r_addend
= addend
+ value
;
7954 outrel
.r_offset
= (sgot
->output_section
->vma
7955 + sgot
->output_offset
7957 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
7958 loc
= srelgot
->contents
;
7959 loc
+= srelgot
->reloc_count
++ * RELOC_SIZE (globals
);
7960 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
7963 local_got_offsets
[r_symndx
] |= 1;
7966 value
= sgot
->output_offset
+ off
;
7968 if (r_type
!= R_ARM_GOT32
)
7969 value
+= sgot
->output_section
->vma
;
7971 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7972 contents
, rel
->r_offset
, value
,
7975 case R_ARM_TLS_LDO32
:
7976 value
= value
- dtpoff_base (info
);
7978 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
7979 contents
, rel
->r_offset
, value
,
7982 case R_ARM_TLS_LDM32
:
7986 if (globals
->sgot
== NULL
)
7989 off
= globals
->tls_ldm_got
.offset
;
7995 /* If we don't know the module number, create a relocation
7999 Elf_Internal_Rela outrel
;
8002 if (globals
->srelgot
== NULL
)
8005 outrel
.r_addend
= 0;
8006 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
8007 + globals
->sgot
->output_offset
+ off
);
8008 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
8010 if (globals
->use_rel
)
8011 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8012 globals
->sgot
->contents
+ off
);
8014 loc
= globals
->srelgot
->contents
;
8015 loc
+= globals
->srelgot
->reloc_count
++ * RELOC_SIZE (globals
);
8016 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8019 bfd_put_32 (output_bfd
, 1, globals
->sgot
->contents
+ off
);
8021 globals
->tls_ldm_got
.offset
|= 1;
8024 value
= globals
->sgot
->output_section
->vma
+ globals
->sgot
->output_offset
+ off
8025 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
8027 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8028 contents
, rel
->r_offset
, value
,
8032 case R_ARM_TLS_GD32
:
8033 case R_ARM_TLS_IE32
:
8039 if (globals
->sgot
== NULL
)
8046 dyn
= globals
->root
.dynamic_sections_created
;
8047 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
8049 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
8051 *unresolved_reloc_p
= FALSE
;
8054 off
= h
->got
.offset
;
8055 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
8059 if (local_got_offsets
== NULL
)
8061 off
= local_got_offsets
[r_symndx
];
8062 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
8065 if (tls_type
== GOT_UNKNOWN
)
8072 bfd_boolean need_relocs
= FALSE
;
8073 Elf_Internal_Rela outrel
;
8074 bfd_byte
*loc
= NULL
;
8077 /* The GOT entries have not been initialized yet. Do it
8078 now, and emit any relocations. If both an IE GOT and a
8079 GD GOT are necessary, we emit the GD first. */
8081 if ((info
->shared
|| indx
!= 0)
8083 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8084 || h
->root
.type
!= bfd_link_hash_undefweak
))
8087 if (globals
->srelgot
== NULL
)
8089 loc
= globals
->srelgot
->contents
;
8090 loc
+= globals
->srelgot
->reloc_count
* RELOC_SIZE (globals
);
8093 if (tls_type
& GOT_TLS_GD
)
8097 outrel
.r_addend
= 0;
8098 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
8099 + globals
->sgot
->output_offset
8101 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
8103 if (globals
->use_rel
)
8104 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8105 globals
->sgot
->contents
+ cur_off
);
8107 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8108 globals
->srelgot
->reloc_count
++;
8109 loc
+= RELOC_SIZE (globals
);
8112 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
8113 globals
->sgot
->contents
+ cur_off
+ 4);
8116 outrel
.r_addend
= 0;
8117 outrel
.r_info
= ELF32_R_INFO (indx
,
8118 R_ARM_TLS_DTPOFF32
);
8119 outrel
.r_offset
+= 4;
8121 if (globals
->use_rel
)
8122 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8123 globals
->sgot
->contents
+ cur_off
+ 4);
8126 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8127 globals
->srelgot
->reloc_count
++;
8128 loc
+= RELOC_SIZE (globals
);
8133 /* If we are not emitting relocations for a
8134 general dynamic reference, then we must be in a
8135 static link or an executable link with the
8136 symbol binding locally. Mark it as belonging
8137 to module 1, the executable. */
8138 bfd_put_32 (output_bfd
, 1,
8139 globals
->sgot
->contents
+ cur_off
);
8140 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
8141 globals
->sgot
->contents
+ cur_off
+ 4);
8147 if (tls_type
& GOT_TLS_IE
)
8152 outrel
.r_addend
= value
- dtpoff_base (info
);
8154 outrel
.r_addend
= 0;
8155 outrel
.r_offset
= (globals
->sgot
->output_section
->vma
8156 + globals
->sgot
->output_offset
8158 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
8160 if (globals
->use_rel
)
8161 bfd_put_32 (output_bfd
, outrel
.r_addend
,
8162 globals
->sgot
->contents
+ cur_off
);
8164 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
8165 globals
->srelgot
->reloc_count
++;
8166 loc
+= RELOC_SIZE (globals
);
8169 bfd_put_32 (output_bfd
, tpoff (info
, value
),
8170 globals
->sgot
->contents
+ cur_off
);
8177 local_got_offsets
[r_symndx
] |= 1;
8180 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
8182 value
= globals
->sgot
->output_section
->vma
+ globals
->sgot
->output_offset
+ off
8183 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
8185 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8186 contents
, rel
->r_offset
, value
,
8190 case R_ARM_TLS_LE32
:
8193 (*_bfd_error_handler
)
8194 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
8195 input_bfd
, input_section
,
8196 (long) rel
->r_offset
, howto
->name
);
8197 return (bfd_reloc_status_type
) FALSE
;
8200 value
= tpoff (info
, value
);
8202 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8203 contents
, rel
->r_offset
, value
,
8207 if (globals
->fix_v4bx
)
8209 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8211 /* Ensure that we have a BX instruction. */
8212 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
8214 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
8216 /* Branch to veneer. */
8218 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
8219 glue_addr
-= input_section
->output_section
->vma
8220 + input_section
->output_offset
8221 + rel
->r_offset
+ 8;
8222 insn
= (insn
& 0xf0000000) | 0x0a000000
8223 | ((glue_addr
>> 2) & 0x00ffffff);
8227 /* Preserve Rm (lowest four bits) and the condition code
8228 (highest four bits). Other bits encode MOV PC,Rm. */
8229 insn
= (insn
& 0xf000000f) | 0x01a0f000;
8232 bfd_put_32 (input_bfd
, insn
, hit_data
);
8234 return bfd_reloc_ok
;
8236 case R_ARM_MOVW_ABS_NC
:
8237 case R_ARM_MOVT_ABS
:
8238 case R_ARM_MOVW_PREL_NC
:
8239 case R_ARM_MOVT_PREL
:
8240 /* Until we properly support segment-base-relative addressing then
8241 we assume the segment base to be zero, as for the group relocations.
8242 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
8243 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
8244 case R_ARM_MOVW_BREL_NC
:
8245 case R_ARM_MOVW_BREL
:
8246 case R_ARM_MOVT_BREL
:
8248 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8250 if (globals
->use_rel
)
8252 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
8253 signed_addend
= (addend
^ 0x8000) - 0x8000;
8256 value
+= signed_addend
;
8258 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
8259 value
-= (input_section
->output_section
->vma
8260 + input_section
->output_offset
+ rel
->r_offset
);
8262 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
8263 return bfd_reloc_overflow
;
8265 if (sym_flags
== STT_ARM_TFUNC
)
8268 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
8269 || r_type
== R_ARM_MOVT_BREL
)
8273 insn
|= value
& 0xfff;
8274 insn
|= (value
& 0xf000) << 4;
8275 bfd_put_32 (input_bfd
, insn
, hit_data
);
8277 return bfd_reloc_ok
;
8279 case R_ARM_THM_MOVW_ABS_NC
:
8280 case R_ARM_THM_MOVT_ABS
:
8281 case R_ARM_THM_MOVW_PREL_NC
:
8282 case R_ARM_THM_MOVT_PREL
:
8283 /* Until we properly support segment-base-relative addressing then
8284 we assume the segment base to be zero, as for the above relocations.
8285 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
8286 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
8287 as R_ARM_THM_MOVT_ABS. */
8288 case R_ARM_THM_MOVW_BREL_NC
:
8289 case R_ARM_THM_MOVW_BREL
:
8290 case R_ARM_THM_MOVT_BREL
:
8294 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
8295 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
8297 if (globals
->use_rel
)
8299 addend
= ((insn
>> 4) & 0xf000)
8300 | ((insn
>> 15) & 0x0800)
8301 | ((insn
>> 4) & 0x0700)
8303 signed_addend
= (addend
^ 0x8000) - 0x8000;
8306 value
+= signed_addend
;
8308 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
8309 value
-= (input_section
->output_section
->vma
8310 + input_section
->output_offset
+ rel
->r_offset
);
8312 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
8313 return bfd_reloc_overflow
;
8315 if (sym_flags
== STT_ARM_TFUNC
)
8318 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
8319 || r_type
== R_ARM_THM_MOVT_BREL
)
8323 insn
|= (value
& 0xf000) << 4;
8324 insn
|= (value
& 0x0800) << 15;
8325 insn
|= (value
& 0x0700) << 4;
8326 insn
|= (value
& 0x00ff);
8328 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8329 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8331 return bfd_reloc_ok
;
8333 case R_ARM_ALU_PC_G0_NC
:
8334 case R_ARM_ALU_PC_G1_NC
:
8335 case R_ARM_ALU_PC_G0
:
8336 case R_ARM_ALU_PC_G1
:
8337 case R_ARM_ALU_PC_G2
:
8338 case R_ARM_ALU_SB_G0_NC
:
8339 case R_ARM_ALU_SB_G1_NC
:
8340 case R_ARM_ALU_SB_G0
:
8341 case R_ARM_ALU_SB_G1
:
8342 case R_ARM_ALU_SB_G2
:
8344 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8345 bfd_vma pc
= input_section
->output_section
->vma
8346 + input_section
->output_offset
+ rel
->r_offset
;
8347 /* sb should be the origin of the *segment* containing the symbol.
8348 It is not clear how to obtain this OS-dependent value, so we
8349 make an arbitrary choice of zero. */
8353 bfd_signed_vma signed_value
;
8356 /* Determine which group of bits to select. */
8359 case R_ARM_ALU_PC_G0_NC
:
8360 case R_ARM_ALU_PC_G0
:
8361 case R_ARM_ALU_SB_G0_NC
:
8362 case R_ARM_ALU_SB_G0
:
8366 case R_ARM_ALU_PC_G1_NC
:
8367 case R_ARM_ALU_PC_G1
:
8368 case R_ARM_ALU_SB_G1_NC
:
8369 case R_ARM_ALU_SB_G1
:
8373 case R_ARM_ALU_PC_G2
:
8374 case R_ARM_ALU_SB_G2
:
8382 /* If REL, extract the addend from the insn. If RELA, it will
8383 have already been fetched for us. */
8384 if (globals
->use_rel
)
8387 bfd_vma constant
= insn
& 0xff;
8388 bfd_vma rotation
= (insn
& 0xf00) >> 8;
8391 signed_addend
= constant
;
8394 /* Compensate for the fact that in the instruction, the
8395 rotation is stored in multiples of 2 bits. */
8398 /* Rotate "constant" right by "rotation" bits. */
8399 signed_addend
= (constant
>> rotation
) |
8400 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
8403 /* Determine if the instruction is an ADD or a SUB.
8404 (For REL, this determines the sign of the addend.) */
8405 negative
= identify_add_or_sub (insn
);
8408 (*_bfd_error_handler
)
8409 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
8410 input_bfd
, input_section
,
8411 (long) rel
->r_offset
, howto
->name
);
8412 return bfd_reloc_overflow
;
8415 signed_addend
*= negative
;
8418 /* Compute the value (X) to go in the place. */
8419 if (r_type
== R_ARM_ALU_PC_G0_NC
8420 || r_type
== R_ARM_ALU_PC_G1_NC
8421 || r_type
== R_ARM_ALU_PC_G0
8422 || r_type
== R_ARM_ALU_PC_G1
8423 || r_type
== R_ARM_ALU_PC_G2
)
8425 signed_value
= value
- pc
+ signed_addend
;
8427 /* Section base relative. */
8428 signed_value
= value
- sb
+ signed_addend
;
8430 /* If the target symbol is a Thumb function, then set the
8431 Thumb bit in the address. */
8432 if (sym_flags
== STT_ARM_TFUNC
)
8435 /* Calculate the value of the relevant G_n, in encoded
8436 constant-with-rotation format. */
8437 g_n
= calculate_group_reloc_mask (abs (signed_value
), group
,
8440 /* Check for overflow if required. */
8441 if ((r_type
== R_ARM_ALU_PC_G0
8442 || r_type
== R_ARM_ALU_PC_G1
8443 || r_type
== R_ARM_ALU_PC_G2
8444 || r_type
== R_ARM_ALU_SB_G0
8445 || r_type
== R_ARM_ALU_SB_G1
8446 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
8448 (*_bfd_error_handler
)
8449 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8450 input_bfd
, input_section
,
8451 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8452 return bfd_reloc_overflow
;
8455 /* Mask out the value and the ADD/SUB part of the opcode; take care
8456 not to destroy the S bit. */
8459 /* Set the opcode according to whether the value to go in the
8460 place is negative. */
8461 if (signed_value
< 0)
8466 /* Encode the offset. */
8469 bfd_put_32 (input_bfd
, insn
, hit_data
);
8471 return bfd_reloc_ok
;
8473 case R_ARM_LDR_PC_G0
:
8474 case R_ARM_LDR_PC_G1
:
8475 case R_ARM_LDR_PC_G2
:
8476 case R_ARM_LDR_SB_G0
:
8477 case R_ARM_LDR_SB_G1
:
8478 case R_ARM_LDR_SB_G2
:
8480 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8481 bfd_vma pc
= input_section
->output_section
->vma
8482 + input_section
->output_offset
+ rel
->r_offset
;
8483 bfd_vma sb
= 0; /* See note above. */
8485 bfd_signed_vma signed_value
;
8488 /* Determine which groups of bits to calculate. */
8491 case R_ARM_LDR_PC_G0
:
8492 case R_ARM_LDR_SB_G0
:
8496 case R_ARM_LDR_PC_G1
:
8497 case R_ARM_LDR_SB_G1
:
8501 case R_ARM_LDR_PC_G2
:
8502 case R_ARM_LDR_SB_G2
:
8510 /* If REL, extract the addend from the insn. If RELA, it will
8511 have already been fetched for us. */
8512 if (globals
->use_rel
)
8514 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8515 signed_addend
= negative
* (insn
& 0xfff);
8518 /* Compute the value (X) to go in the place. */
8519 if (r_type
== R_ARM_LDR_PC_G0
8520 || r_type
== R_ARM_LDR_PC_G1
8521 || r_type
== R_ARM_LDR_PC_G2
)
8523 signed_value
= value
- pc
+ signed_addend
;
8525 /* Section base relative. */
8526 signed_value
= value
- sb
+ signed_addend
;
8528 /* Calculate the value of the relevant G_{n-1} to obtain
8529 the residual at that stage. */
8530 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8532 /* Check for overflow. */
8533 if (residual
>= 0x1000)
8535 (*_bfd_error_handler
)
8536 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8537 input_bfd
, input_section
,
8538 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8539 return bfd_reloc_overflow
;
8542 /* Mask out the value and U bit. */
8545 /* Set the U bit if the value to go in the place is non-negative. */
8546 if (signed_value
>= 0)
8549 /* Encode the offset. */
8552 bfd_put_32 (input_bfd
, insn
, hit_data
);
8554 return bfd_reloc_ok
;
8556 case R_ARM_LDRS_PC_G0
:
8557 case R_ARM_LDRS_PC_G1
:
8558 case R_ARM_LDRS_PC_G2
:
8559 case R_ARM_LDRS_SB_G0
:
8560 case R_ARM_LDRS_SB_G1
:
8561 case R_ARM_LDRS_SB_G2
:
8563 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8564 bfd_vma pc
= input_section
->output_section
->vma
8565 + input_section
->output_offset
+ rel
->r_offset
;
8566 bfd_vma sb
= 0; /* See note above. */
8568 bfd_signed_vma signed_value
;
8571 /* Determine which groups of bits to calculate. */
8574 case R_ARM_LDRS_PC_G0
:
8575 case R_ARM_LDRS_SB_G0
:
8579 case R_ARM_LDRS_PC_G1
:
8580 case R_ARM_LDRS_SB_G1
:
8584 case R_ARM_LDRS_PC_G2
:
8585 case R_ARM_LDRS_SB_G2
:
8593 /* If REL, extract the addend from the insn. If RELA, it will
8594 have already been fetched for us. */
8595 if (globals
->use_rel
)
8597 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8598 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
8601 /* Compute the value (X) to go in the place. */
8602 if (r_type
== R_ARM_LDRS_PC_G0
8603 || r_type
== R_ARM_LDRS_PC_G1
8604 || r_type
== R_ARM_LDRS_PC_G2
)
8606 signed_value
= value
- pc
+ signed_addend
;
8608 /* Section base relative. */
8609 signed_value
= value
- sb
+ signed_addend
;
8611 /* Calculate the value of the relevant G_{n-1} to obtain
8612 the residual at that stage. */
8613 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8615 /* Check for overflow. */
8616 if (residual
>= 0x100)
8618 (*_bfd_error_handler
)
8619 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8620 input_bfd
, input_section
,
8621 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8622 return bfd_reloc_overflow
;
8625 /* Mask out the value and U bit. */
8628 /* Set the U bit if the value to go in the place is non-negative. */
8629 if (signed_value
>= 0)
8632 /* Encode the offset. */
8633 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
8635 bfd_put_32 (input_bfd
, insn
, hit_data
);
8637 return bfd_reloc_ok
;
8639 case R_ARM_LDC_PC_G0
:
8640 case R_ARM_LDC_PC_G1
:
8641 case R_ARM_LDC_PC_G2
:
8642 case R_ARM_LDC_SB_G0
:
8643 case R_ARM_LDC_SB_G1
:
8644 case R_ARM_LDC_SB_G2
:
8646 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
8647 bfd_vma pc
= input_section
->output_section
->vma
8648 + input_section
->output_offset
+ rel
->r_offset
;
8649 bfd_vma sb
= 0; /* See note above. */
8651 bfd_signed_vma signed_value
;
8654 /* Determine which groups of bits to calculate. */
8657 case R_ARM_LDC_PC_G0
:
8658 case R_ARM_LDC_SB_G0
:
8662 case R_ARM_LDC_PC_G1
:
8663 case R_ARM_LDC_SB_G1
:
8667 case R_ARM_LDC_PC_G2
:
8668 case R_ARM_LDC_SB_G2
:
8676 /* If REL, extract the addend from the insn. If RELA, it will
8677 have already been fetched for us. */
8678 if (globals
->use_rel
)
8680 int negative
= (insn
& (1 << 23)) ? 1 : -1;
8681 signed_addend
= negative
* ((insn
& 0xff) << 2);
8684 /* Compute the value (X) to go in the place. */
8685 if (r_type
== R_ARM_LDC_PC_G0
8686 || r_type
== R_ARM_LDC_PC_G1
8687 || r_type
== R_ARM_LDC_PC_G2
)
8689 signed_value
= value
- pc
+ signed_addend
;
8691 /* Section base relative. */
8692 signed_value
= value
- sb
+ signed_addend
;
8694 /* Calculate the value of the relevant G_{n-1} to obtain
8695 the residual at that stage. */
8696 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
8698 /* Check for overflow. (The absolute value to go in the place must be
8699 divisible by four and, after having been divided by four, must
8700 fit in eight bits.) */
8701 if ((residual
& 0x3) != 0 || residual
>= 0x400)
8703 (*_bfd_error_handler
)
8704 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
8705 input_bfd
, input_section
,
8706 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
8707 return bfd_reloc_overflow
;
8710 /* Mask out the value and U bit. */
8713 /* Set the U bit if the value to go in the place is non-negative. */
8714 if (signed_value
>= 0)
8717 /* Encode the offset. */
8718 insn
|= residual
>> 2;
8720 bfd_put_32 (input_bfd
, insn
, hit_data
);
8722 return bfd_reloc_ok
;
8725 return bfd_reloc_notsupported
;
8729 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
8731 arm_add_to_rel (bfd
* abfd
,
8733 reloc_howto_type
* howto
,
8734 bfd_signed_vma increment
)
8736 bfd_signed_vma addend
;
8738 if (howto
->type
== R_ARM_THM_CALL
8739 || howto
->type
== R_ARM_THM_JUMP24
)
8741 int upper_insn
, lower_insn
;
8744 upper_insn
= bfd_get_16 (abfd
, address
);
8745 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
8746 upper
= upper_insn
& 0x7ff;
8747 lower
= lower_insn
& 0x7ff;
8749 addend
= (upper
<< 12) | (lower
<< 1);
8750 addend
+= increment
;
8753 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
8754 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
8756 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
8757 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
8763 contents
= bfd_get_32 (abfd
, address
);
8765 /* Get the (signed) value from the instruction. */
8766 addend
= contents
& howto
->src_mask
;
8767 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8769 bfd_signed_vma mask
;
8772 mask
&= ~ howto
->src_mask
;
8776 /* Add in the increment, (which is a byte value). */
8777 switch (howto
->type
)
8780 addend
+= increment
;
8787 addend
<<= howto
->size
;
8788 addend
+= increment
;
8790 /* Should we check for overflow here ? */
8792 /* Drop any undesired bits. */
8793 addend
>>= howto
->rightshift
;
8797 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
8799 bfd_put_32 (abfd
, contents
, address
);
8803 #define IS_ARM_TLS_RELOC(R_TYPE) \
8804 ((R_TYPE) == R_ARM_TLS_GD32 \
8805 || (R_TYPE) == R_ARM_TLS_LDO32 \
8806 || (R_TYPE) == R_ARM_TLS_LDM32 \
8807 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
8808 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
8809 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
8810 || (R_TYPE) == R_ARM_TLS_LE32 \
8811 || (R_TYPE) == R_ARM_TLS_IE32)
8813 /* Relocate an ARM ELF section. */
8816 elf32_arm_relocate_section (bfd
* output_bfd
,
8817 struct bfd_link_info
* info
,
8819 asection
* input_section
,
8820 bfd_byte
* contents
,
8821 Elf_Internal_Rela
* relocs
,
8822 Elf_Internal_Sym
* local_syms
,
8823 asection
** local_sections
)
8825 Elf_Internal_Shdr
*symtab_hdr
;
8826 struct elf_link_hash_entry
**sym_hashes
;
8827 Elf_Internal_Rela
*rel
;
8828 Elf_Internal_Rela
*relend
;
8830 struct elf32_arm_link_hash_table
* globals
;
8832 globals
= elf32_arm_hash_table (info
);
8833 if (globals
== NULL
)
8836 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
8837 sym_hashes
= elf_sym_hashes (input_bfd
);
8840 relend
= relocs
+ input_section
->reloc_count
;
8841 for (; rel
< relend
; rel
++)
8844 reloc_howto_type
* howto
;
8845 unsigned long r_symndx
;
8846 Elf_Internal_Sym
* sym
;
8848 struct elf_link_hash_entry
* h
;
8850 bfd_reloc_status_type r
;
8853 bfd_boolean unresolved_reloc
= FALSE
;
8854 char *error_message
= NULL
;
8856 r_symndx
= ELF32_R_SYM (rel
->r_info
);
8857 r_type
= ELF32_R_TYPE (rel
->r_info
);
8858 r_type
= arm_real_reloc_type (globals
, r_type
);
8860 if ( r_type
== R_ARM_GNU_VTENTRY
8861 || r_type
== R_ARM_GNU_VTINHERIT
)
8864 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
8865 howto
= bfd_reloc
.howto
;
8871 if (r_symndx
< symtab_hdr
->sh_info
)
8873 sym
= local_syms
+ r_symndx
;
8874 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
8875 sec
= local_sections
[r_symndx
];
8877 /* An object file might have a reference to a local
8878 undefined symbol. This is a daft object file, but we
8879 should at least do something about it. V4BX & NONE
8880 relocations do not use the symbol and are explicitly
8881 allowed to use the undefined symbol, so allow those. */
8882 if (r_type
!= R_ARM_V4BX
8883 && r_type
!= R_ARM_NONE
8884 && bfd_is_und_section (sec
)
8885 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
8887 if (!info
->callbacks
->undefined_symbol
8888 (info
, bfd_elf_string_from_elf_section
8889 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
8890 input_bfd
, input_section
,
8891 rel
->r_offset
, TRUE
))
8895 if (globals
->use_rel
)
8897 relocation
= (sec
->output_section
->vma
8898 + sec
->output_offset
8900 if (!info
->relocatable
8901 && (sec
->flags
& SEC_MERGE
)
8902 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
8905 bfd_vma addend
, value
;
8909 case R_ARM_MOVW_ABS_NC
:
8910 case R_ARM_MOVT_ABS
:
8911 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
8912 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
8913 addend
= (addend
^ 0x8000) - 0x8000;
8916 case R_ARM_THM_MOVW_ABS_NC
:
8917 case R_ARM_THM_MOVT_ABS
:
8918 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
8920 value
|= bfd_get_16 (input_bfd
,
8921 contents
+ rel
->r_offset
+ 2);
8922 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
8923 | ((value
& 0x04000000) >> 15);
8924 addend
= (addend
^ 0x8000) - 0x8000;
8928 if (howto
->rightshift
8929 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
8931 (*_bfd_error_handler
)
8932 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
8933 input_bfd
, input_section
,
8934 (long) rel
->r_offset
, howto
->name
);
8938 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
8940 /* Get the (signed) value from the instruction. */
8941 addend
= value
& howto
->src_mask
;
8942 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8944 bfd_signed_vma mask
;
8947 mask
&= ~ howto
->src_mask
;
8955 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
8957 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
8959 /* Cases here must match those in the preceeding
8960 switch statement. */
8963 case R_ARM_MOVW_ABS_NC
:
8964 case R_ARM_MOVT_ABS
:
8965 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
8967 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
8970 case R_ARM_THM_MOVW_ABS_NC
:
8971 case R_ARM_THM_MOVT_ABS
:
8972 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
8973 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
8974 bfd_put_16 (input_bfd
, value
>> 16,
8975 contents
+ rel
->r_offset
);
8976 bfd_put_16 (input_bfd
, value
,
8977 contents
+ rel
->r_offset
+ 2);
8981 value
= (value
& ~ howto
->dst_mask
)
8982 | (addend
& howto
->dst_mask
);
8983 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
8989 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
8995 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
8996 r_symndx
, symtab_hdr
, sym_hashes
,
8998 unresolved_reloc
, warned
);
9003 if (sec
!= NULL
&& elf_discarded_section (sec
))
9005 /* For relocs against symbols from removed linkonce sections,
9006 or sections discarded by a linker script, we just want the
9007 section contents zeroed. Avoid any special processing. */
9008 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
9014 if (info
->relocatable
)
9016 /* This is a relocatable link. We don't have to change
9017 anything, unless the reloc is against a section symbol,
9018 in which case we have to adjust according to where the
9019 section symbol winds up in the output section. */
9020 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
9022 if (globals
->use_rel
)
9023 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
9024 howto
, (bfd_signed_vma
) sec
->output_offset
);
9026 rel
->r_addend
+= sec
->output_offset
;
9032 name
= h
->root
.root
.string
;
9035 name
= (bfd_elf_string_from_elf_section
9036 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
9037 if (name
== NULL
|| *name
== '\0')
9038 name
= bfd_section_name (input_bfd
, sec
);
9042 && r_type
!= R_ARM_NONE
9044 || h
->root
.type
== bfd_link_hash_defined
9045 || h
->root
.type
== bfd_link_hash_defweak
)
9046 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
9048 (*_bfd_error_handler
)
9049 ((sym_type
== STT_TLS
9050 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9051 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
9054 (long) rel
->r_offset
,
9059 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
9060 input_section
, contents
, rel
,
9061 relocation
, info
, sec
, name
,
9062 (h
? ELF_ST_TYPE (h
->type
) :
9063 ELF_ST_TYPE (sym
->st_info
)), h
,
9064 &unresolved_reloc
, &error_message
);
9066 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
9067 because such sections are not SEC_ALLOC and thus ld.so will
9068 not process them. */
9069 if (unresolved_reloc
9070 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
9073 (*_bfd_error_handler
)
9074 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
9077 (long) rel
->r_offset
,
9079 h
->root
.root
.string
);
9083 if (r
!= bfd_reloc_ok
)
9087 case bfd_reloc_overflow
:
9088 /* If the overflowing reloc was to an undefined symbol,
9089 we have already printed one error message and there
9090 is no point complaining again. */
9092 h
->root
.type
!= bfd_link_hash_undefined
)
9093 && (!((*info
->callbacks
->reloc_overflow
)
9094 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
9095 (bfd_vma
) 0, input_bfd
, input_section
,
9100 case bfd_reloc_undefined
:
9101 if (!((*info
->callbacks
->undefined_symbol
)
9102 (info
, name
, input_bfd
, input_section
,
9103 rel
->r_offset
, TRUE
)))
9107 case bfd_reloc_outofrange
:
9108 error_message
= _("out of range");
9111 case bfd_reloc_notsupported
:
9112 error_message
= _("unsupported relocation");
9115 case bfd_reloc_dangerous
:
9116 /* error_message should already be set. */
9120 error_message
= _("unknown error");
9124 BFD_ASSERT (error_message
!= NULL
);
9125 if (!((*info
->callbacks
->reloc_dangerous
)
9126 (info
, error_message
, input_bfd
, input_section
,
9137 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
9138 adds the edit to the start of the list. (The list must be built in order of
9139 ascending TINDEX: the function's callers are primarily responsible for
9140 maintaining that condition). */
9143 add_unwind_table_edit (arm_unwind_table_edit
**head
,
9144 arm_unwind_table_edit
**tail
,
9145 arm_unwind_edit_type type
,
9146 asection
*linked_section
,
9147 unsigned int tindex
)
9149 arm_unwind_table_edit
*new_edit
= (arm_unwind_table_edit
*)
9150 xmalloc (sizeof (arm_unwind_table_edit
));
9152 new_edit
->type
= type
;
9153 new_edit
->linked_section
= linked_section
;
9154 new_edit
->index
= tindex
;
9158 new_edit
->next
= NULL
;
9161 (*tail
)->next
= new_edit
;
9170 new_edit
->next
= *head
;
9179 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
9181 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
9183 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
9187 if (!exidx_sec
->rawsize
)
9188 exidx_sec
->rawsize
= exidx_sec
->size
;
9190 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
9191 out_sec
= exidx_sec
->output_section
;
9192 /* Adjust size of output section. */
9193 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
9196 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
9198 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
9200 struct _arm_elf_section_data
*exidx_arm_data
;
9202 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
9203 add_unwind_table_edit (
9204 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
9205 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
9206 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
9208 adjust_exidx_size(exidx_sec
, 8);
9211 /* Scan .ARM.exidx tables, and create a list describing edits which should be
9212 made to those tables, such that:
9214 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
9215 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
9216 codes which have been inlined into the index).
9218 The edits are applied when the tables are written
9219 (in elf32_arm_write_section).
9223 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
9224 unsigned int num_text_sections
,
9225 struct bfd_link_info
*info
)
9228 unsigned int last_second_word
= 0, i
;
9229 asection
*last_exidx_sec
= NULL
;
9230 asection
*last_text_sec
= NULL
;
9231 int last_unwind_type
= -1;
9233 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
9235 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link_next
)
9239 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
9241 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
9242 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
9244 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
9247 if (elf_sec
->linked_to
)
9249 Elf_Internal_Shdr
*linked_hdr
9250 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
9251 struct _arm_elf_section_data
*linked_sec_arm_data
9252 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
9254 if (linked_sec_arm_data
== NULL
)
9257 /* Link this .ARM.exidx section back from the text section it
9259 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
9264 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
9265 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
9266 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
9268 for (i
= 0; i
< num_text_sections
; i
++)
9270 asection
*sec
= text_section_order
[i
];
9271 asection
*exidx_sec
;
9272 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
9273 struct _arm_elf_section_data
*exidx_arm_data
;
9274 bfd_byte
*contents
= NULL
;
9275 int deleted_exidx_bytes
= 0;
9277 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
9278 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
9279 Elf_Internal_Shdr
*hdr
;
9282 if (arm_data
== NULL
)
9285 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
9286 if (exidx_sec
== NULL
)
9288 /* Section has no unwind data. */
9289 if (last_unwind_type
== 0 || !last_exidx_sec
)
9292 /* Ignore zero sized sections. */
9296 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
9297 last_unwind_type
= 0;
9301 /* Skip /DISCARD/ sections. */
9302 if (bfd_is_abs_section (exidx_sec
->output_section
))
9305 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
9306 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
9309 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
9310 if (exidx_arm_data
== NULL
)
9313 ibfd
= exidx_sec
->owner
;
9315 if (hdr
->contents
!= NULL
)
9316 contents
= hdr
->contents
;
9317 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
9321 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
9323 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
9327 /* An EXIDX_CANTUNWIND entry. */
9328 if (second_word
== 1)
9330 if (last_unwind_type
== 0)
9334 /* Inlined unwinding data. Merge if equal to previous. */
9335 else if ((second_word
& 0x80000000) != 0)
9337 if (last_second_word
== second_word
&& last_unwind_type
== 1)
9340 last_second_word
= second_word
;
9342 /* Normal table entry. In theory we could merge these too,
9343 but duplicate entries are likely to be much less common. */
9349 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
9350 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
9352 deleted_exidx_bytes
+= 8;
9355 last_unwind_type
= unwind_type
;
9358 /* Free contents if we allocated it ourselves. */
9359 if (contents
!= hdr
->contents
)
9362 /* Record edits to be applied later (in elf32_arm_write_section). */
9363 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
9364 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
9366 if (deleted_exidx_bytes
> 0)
9367 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
9369 last_exidx_sec
= exidx_sec
;
9370 last_text_sec
= sec
;
9373 /* Add terminating CANTUNWIND entry. */
9374 if (last_exidx_sec
&& last_unwind_type
!= 0)
9375 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
9381 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
9382 bfd
*ibfd
, const char *name
)
9384 asection
*sec
, *osec
;
9386 sec
= bfd_get_section_by_name (ibfd
, name
);
9387 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
9390 osec
= sec
->output_section
;
9391 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
9394 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
9395 sec
->output_offset
, sec
->size
))
9402 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
9404 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
9405 asection
*sec
, *osec
;
9407 if (globals
== NULL
)
9410 /* Invoke the regular ELF backend linker to do all the work. */
9411 if (!bfd_elf_final_link (abfd
, info
))
9414 /* Process stub sections (eg BE8 encoding, ...). */
9415 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
9417 for(i
=0; i
<htab
->top_id
; i
++) {
9418 sec
= htab
->stub_group
[i
].stub_sec
;
9420 osec
= sec
->output_section
;
9421 elf32_arm_write_section (abfd
, info
, sec
, sec
->contents
);
9422 if (! bfd_set_section_contents (abfd
, osec
, sec
->contents
,
9423 sec
->output_offset
, sec
->size
))
9428 /* Write out any glue sections now that we have created all the
9430 if (globals
->bfd_of_glue_owner
!= NULL
)
9432 if (! elf32_arm_output_glue_section (info
, abfd
,
9433 globals
->bfd_of_glue_owner
,
9434 ARM2THUMB_GLUE_SECTION_NAME
))
9437 if (! elf32_arm_output_glue_section (info
, abfd
,
9438 globals
->bfd_of_glue_owner
,
9439 THUMB2ARM_GLUE_SECTION_NAME
))
9442 if (! elf32_arm_output_glue_section (info
, abfd
,
9443 globals
->bfd_of_glue_owner
,
9444 VFP11_ERRATUM_VENEER_SECTION_NAME
))
9447 if (! elf32_arm_output_glue_section (info
, abfd
,
9448 globals
->bfd_of_glue_owner
,
9449 ARM_BX_GLUE_SECTION_NAME
))
9456 /* Set the right machine number. */
9459 elf32_arm_object_p (bfd
*abfd
)
9463 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
9465 if (mach
!= bfd_mach_arm_unknown
)
9466 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
9468 else if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
9469 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, bfd_mach_arm_ep9312
);
9472 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
9477 /* Function to keep ARM specific flags in the ELF header. */
9480 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
9482 if (elf_flags_init (abfd
)
9483 && elf_elfheader (abfd
)->e_flags
!= flags
)
9485 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
9487 if (flags
& EF_ARM_INTERWORK
)
9488 (*_bfd_error_handler
)
9489 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
9493 (_("Warning: Clearing the interworking flag of %B due to outside request"),
9499 elf_elfheader (abfd
)->e_flags
= flags
;
9500 elf_flags_init (abfd
) = TRUE
;
9506 /* Copy backend specific data from one object module to another. */
9509 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
9514 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
9517 in_flags
= elf_elfheader (ibfd
)->e_flags
;
9518 out_flags
= elf_elfheader (obfd
)->e_flags
;
9520 if (elf_flags_init (obfd
)
9521 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
9522 && in_flags
!= out_flags
)
9524 /* Cannot mix APCS26 and APCS32 code. */
9525 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
9528 /* Cannot mix float APCS and non-float APCS code. */
9529 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
9532 /* If the src and dest have different interworking flags
9533 then turn off the interworking bit. */
9534 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
9536 if (out_flags
& EF_ARM_INTERWORK
)
9538 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
9541 in_flags
&= ~EF_ARM_INTERWORK
;
9544 /* Likewise for PIC, though don't warn for this case. */
9545 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
9546 in_flags
&= ~EF_ARM_PIC
;
9549 elf_elfheader (obfd
)->e_flags
= in_flags
;
9550 elf_flags_init (obfd
) = TRUE
;
9552 /* Also copy the EI_OSABI field. */
9553 elf_elfheader (obfd
)->e_ident
[EI_OSABI
] =
9554 elf_elfheader (ibfd
)->e_ident
[EI_OSABI
];
9556 /* Copy object attributes. */
9557 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
9562 /* Values for Tag_ABI_PCS_R9_use. */
9571 /* Values for Tag_ABI_PCS_RW_data. */
9574 AEABI_PCS_RW_data_absolute
,
9575 AEABI_PCS_RW_data_PCrel
,
9576 AEABI_PCS_RW_data_SBrel
,
9577 AEABI_PCS_RW_data_unused
9580 /* Values for Tag_ABI_enum_size. */
9586 AEABI_enum_forced_wide
9589 /* Determine whether an object attribute tag takes an integer, a
9593 elf32_arm_obj_attrs_arg_type (int tag
)
9595 if (tag
== Tag_compatibility
)
9596 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
9597 else if (tag
== Tag_nodefaults
)
9598 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
9599 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
9600 return ATTR_TYPE_FLAG_STR_VAL
;
9602 return ATTR_TYPE_FLAG_INT_VAL
;
9604 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
9607 /* The ABI defines that Tag_conformance should be emitted first, and that
9608 Tag_nodefaults should be second (if either is defined). This sets those
9609 two positions, and bumps up the position of all the remaining tags to
9612 elf32_arm_obj_attrs_order (int num
)
9615 return Tag_conformance
;
9617 return Tag_nodefaults
;
9618 if ((num
- 2) < Tag_nodefaults
)
9620 if ((num
- 1) < Tag_conformance
)
9625 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
9626 Returns -1 if no architecture could be read. */
9629 get_secondary_compatible_arch (bfd
*abfd
)
9631 obj_attribute
*attr
=
9632 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
9634 /* Note: the tag and its argument below are uleb128 values, though
9635 currently-defined values fit in one byte for each. */
9637 && attr
->s
[0] == Tag_CPU_arch
9638 && (attr
->s
[1] & 128) != 128
9642 /* This tag is "safely ignorable", so don't complain if it looks funny. */
9646 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
9647 The tag is removed if ARCH is -1. */
9650 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
9652 obj_attribute
*attr
=
9653 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
9661 /* Note: the tag and its argument below are uleb128 values, though
9662 currently-defined values fit in one byte for each. */
9664 attr
->s
= (char *) bfd_alloc (abfd
, 3);
9665 attr
->s
[0] = Tag_CPU_arch
;
9670 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
9674 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
9675 int newtag
, int secondary_compat
)
9677 #define T(X) TAG_CPU_ARCH_##X
9678 int tagl
, tagh
, result
;
9681 T(V6T2
), /* PRE_V4. */
9685 T(V6T2
), /* V5TE. */
9686 T(V6T2
), /* V5TEJ. */
9693 T(V6K
), /* PRE_V4. */
9698 T(V6K
), /* V5TEJ. */
9700 T(V6KZ
), /* V6KZ. */
9706 T(V7
), /* PRE_V4. */
9725 T(V6K
), /* V5TEJ. */
9727 T(V6KZ
), /* V6KZ. */
9740 T(V6K
), /* V5TEJ. */
9742 T(V6KZ
), /* V6KZ. */
9746 T(V6S_M
), /* V6_M. */
9747 T(V6S_M
) /* V6S_M. */
9753 T(V7E_M
), /* V4T. */
9754 T(V7E_M
), /* V5T. */
9755 T(V7E_M
), /* V5TE. */
9756 T(V7E_M
), /* V5TEJ. */
9758 T(V7E_M
), /* V6KZ. */
9759 T(V7E_M
), /* V6T2. */
9760 T(V7E_M
), /* V6K. */
9762 T(V7E_M
), /* V6_M. */
9763 T(V7E_M
), /* V6S_M. */
9764 T(V7E_M
) /* V7E_M. */
9766 const int v4t_plus_v6_m
[] =
9772 T(V5TE
), /* V5TE. */
9773 T(V5TEJ
), /* V5TEJ. */
9775 T(V6KZ
), /* V6KZ. */
9776 T(V6T2
), /* V6T2. */
9779 T(V6_M
), /* V6_M. */
9780 T(V6S_M
), /* V6S_M. */
9781 T(V7E_M
), /* V7E_M. */
9782 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
9792 /* Pseudo-architecture. */
9796 /* Check we've not got a higher architecture than we know about. */
9798 if (oldtag
> MAX_TAG_CPU_ARCH
|| newtag
> MAX_TAG_CPU_ARCH
)
9800 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
9804 /* Override old tag if we have a Tag_also_compatible_with on the output. */
9806 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
9807 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
9808 oldtag
= T(V4T_PLUS_V6_M
);
9810 /* And override the new tag if we have a Tag_also_compatible_with on the
9813 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
9814 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
9815 newtag
= T(V4T_PLUS_V6_M
);
9817 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
9818 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
9820 /* Architectures before V6KZ add features monotonically. */
9821 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
9824 result
= comb
[tagh
- T(V6T2
)][tagl
];
9826 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
9827 as the canonical version. */
9828 if (result
== T(V4T_PLUS_V6_M
))
9831 *secondary_compat_out
= T(V6_M
);
9834 *secondary_compat_out
= -1;
9838 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
9839 ibfd
, oldtag
, newtag
);
9847 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
9848 are conflicting attributes. */
9851 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, bfd
*obfd
)
9853 obj_attribute
*in_attr
;
9854 obj_attribute
*out_attr
;
9855 obj_attribute_list
*in_list
;
9856 obj_attribute_list
*out_list
;
9857 obj_attribute_list
**out_listp
;
9858 /* Some tags have 0 = don't care, 1 = strong requirement,
9859 2 = weak requirement. */
9860 static const int order_021
[3] = {0, 2, 1};
9862 bfd_boolean result
= TRUE
;
9864 /* Skip the linker stubs file. This preserves previous behavior
9865 of accepting unknown attributes in the first input file - but
9867 if (ibfd
->flags
& BFD_LINKER_CREATED
)
9870 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
9872 /* This is the first object. Copy the attributes. */
9873 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
9875 out_attr
= elf_known_obj_attributes_proc (obfd
);
9877 /* Use the Tag_null value to indicate the attributes have been
9881 /* We do not output objects with Tag_MPextension_use_legacy - we move
9882 the attribute's value to Tag_MPextension_use. */
9883 if (out_attr
[Tag_MPextension_use_legacy
].i
!= 0)
9885 if (out_attr
[Tag_MPextension_use
].i
!= 0
9886 && out_attr
[Tag_MPextension_use_legacy
].i
9887 != out_attr
[Tag_MPextension_use
].i
)
9890 (_("Error: %B has both the current and legacy "
9891 "Tag_MPextension_use attributes"), ibfd
);
9895 out_attr
[Tag_MPextension_use
] =
9896 out_attr
[Tag_MPextension_use_legacy
];
9897 out_attr
[Tag_MPextension_use_legacy
].type
= 0;
9898 out_attr
[Tag_MPextension_use_legacy
].i
= 0;
9904 in_attr
= elf_known_obj_attributes_proc (ibfd
);
9905 out_attr
= elf_known_obj_attributes_proc (obfd
);
9906 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
9907 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
9909 /* Ignore mismatches if the object doesn't use floating point. */
9910 if (out_attr
[Tag_ABI_FP_number_model
].i
== 0)
9911 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
9912 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= 0)
9915 (_("error: %B uses VFP register arguments, %B does not"),
9916 in_attr
[Tag_ABI_VFP_args
].i
? ibfd
: obfd
,
9917 in_attr
[Tag_ABI_VFP_args
].i
? obfd
: ibfd
);
9922 for (i
= 4; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
9924 /* Merge this attribute with existing attributes. */
9927 case Tag_CPU_raw_name
:
9929 /* These are merged after Tag_CPU_arch. */
9932 case Tag_ABI_optimization_goals
:
9933 case Tag_ABI_FP_optimization_goals
:
9934 /* Use the first value seen. */
9939 int secondary_compat
= -1, secondary_compat_out
= -1;
9940 unsigned int saved_out_attr
= out_attr
[i
].i
;
9941 static const char *name_table
[] = {
9942 /* These aren't real CPU names, but we can't guess
9943 that from the architecture version alone. */
9959 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
9960 secondary_compat
= get_secondary_compatible_arch (ibfd
);
9961 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
9962 out_attr
[i
].i
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
9963 &secondary_compat_out
,
9966 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
9968 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
9969 if (out_attr
[i
].i
== saved_out_attr
)
9970 ; /* Leave the names alone. */
9971 else if (out_attr
[i
].i
== in_attr
[i
].i
)
9973 /* The output architecture has been changed to match the
9974 input architecture. Use the input names. */
9975 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
9976 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
9978 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
9979 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
9984 out_attr
[Tag_CPU_name
].s
= NULL
;
9985 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
9988 /* If we still don't have a value for Tag_CPU_name,
9989 make one up now. Tag_CPU_raw_name remains blank. */
9990 if (out_attr
[Tag_CPU_name
].s
== NULL
9991 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
9992 out_attr
[Tag_CPU_name
].s
=
9993 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
9997 case Tag_ARM_ISA_use
:
9998 case Tag_THUMB_ISA_use
:
10000 case Tag_Advanced_SIMD_arch
:
10001 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
10002 case Tag_ABI_FP_rounding
:
10003 case Tag_ABI_FP_exceptions
:
10004 case Tag_ABI_FP_user_exceptions
:
10005 case Tag_ABI_FP_number_model
:
10006 case Tag_VFP_HP_extension
:
10007 case Tag_CPU_unaligned_access
:
10009 case Tag_Virtualization_use
:
10010 case Tag_MPextension_use
:
10011 /* Use the largest value specified. */
10012 if (in_attr
[i
].i
> out_attr
[i
].i
)
10013 out_attr
[i
].i
= in_attr
[i
].i
;
10016 case Tag_ABI_align8_preserved
:
10017 case Tag_ABI_PCS_RO_data
:
10018 /* Use the smallest value specified. */
10019 if (in_attr
[i
].i
< out_attr
[i
].i
)
10020 out_attr
[i
].i
= in_attr
[i
].i
;
10023 case Tag_ABI_align8_needed
:
10024 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
10025 && (in_attr
[Tag_ABI_align8_preserved
].i
== 0
10026 || out_attr
[Tag_ABI_align8_preserved
].i
== 0))
10028 /* This error message should be enabled once all non-conformant
10029 binaries in the toolchain have had the attributes set
10032 (_("error: %B: 8-byte data alignment conflicts with %B"),
10036 /* Fall through. */
10037 case Tag_ABI_FP_denormal
:
10038 case Tag_ABI_PCS_GOT_use
:
10039 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
10040 value if greater than 2 (for future-proofing). */
10041 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
10042 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
10043 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
10044 out_attr
[i
].i
= in_attr
[i
].i
;
10048 case Tag_CPU_arch_profile
:
10049 if (out_attr
[i
].i
!= in_attr
[i
].i
)
10051 /* 0 will merge with anything.
10052 'A' and 'S' merge to 'A'.
10053 'R' and 'S' merge to 'R'.
10054 'M' and 'A|R|S' is an error. */
10055 if (out_attr
[i
].i
== 0
10056 || (out_attr
[i
].i
== 'S'
10057 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
10058 out_attr
[i
].i
= in_attr
[i
].i
;
10059 else if (in_attr
[i
].i
== 0
10060 || (in_attr
[i
].i
== 'S'
10061 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
10062 ; /* Do nothing. */
10066 (_("error: %B: Conflicting architecture profiles %c/%c"),
10068 in_attr
[i
].i
? in_attr
[i
].i
: '0',
10069 out_attr
[i
].i
? out_attr
[i
].i
: '0');
10076 static const struct
10080 } vfp_versions
[7] =
10094 /* Values greater than 6 aren't defined, so just pick the
10096 if (in_attr
[i
].i
> 6 && in_attr
[i
].i
> out_attr
[i
].i
)
10098 out_attr
[i
] = in_attr
[i
];
10101 /* The output uses the superset of input features
10102 (ISA version) and registers. */
10103 ver
= vfp_versions
[in_attr
[i
].i
].ver
;
10104 if (ver
< vfp_versions
[out_attr
[i
].i
].ver
)
10105 ver
= vfp_versions
[out_attr
[i
].i
].ver
;
10106 regs
= vfp_versions
[in_attr
[i
].i
].regs
;
10107 if (regs
< vfp_versions
[out_attr
[i
].i
].regs
)
10108 regs
= vfp_versions
[out_attr
[i
].i
].regs
;
10109 /* This assumes all possible supersets are also a valid
10111 for (newval
= 6; newval
> 0; newval
--)
10113 if (regs
== vfp_versions
[newval
].regs
10114 && ver
== vfp_versions
[newval
].ver
)
10117 out_attr
[i
].i
= newval
;
10120 case Tag_PCS_config
:
10121 if (out_attr
[i
].i
== 0)
10122 out_attr
[i
].i
= in_attr
[i
].i
;
10123 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
10125 /* It's sometimes ok to mix different configs, so this is only
10128 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
10131 case Tag_ABI_PCS_R9_use
:
10132 if (in_attr
[i
].i
!= out_attr
[i
].i
10133 && out_attr
[i
].i
!= AEABI_R9_unused
10134 && in_attr
[i
].i
!= AEABI_R9_unused
)
10137 (_("error: %B: Conflicting use of R9"), ibfd
);
10140 if (out_attr
[i
].i
== AEABI_R9_unused
)
10141 out_attr
[i
].i
= in_attr
[i
].i
;
10143 case Tag_ABI_PCS_RW_data
:
10144 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
10145 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
10146 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
10149 (_("error: %B: SB relative addressing conflicts with use of R9"),
10153 /* Use the smallest value specified. */
10154 if (in_attr
[i
].i
< out_attr
[i
].i
)
10155 out_attr
[i
].i
= in_attr
[i
].i
;
10157 case Tag_ABI_PCS_wchar_t
:
10158 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
10159 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
10162 (_("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"),
10163 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
10165 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
10166 out_attr
[i
].i
= in_attr
[i
].i
;
10168 case Tag_ABI_enum_size
:
10169 if (in_attr
[i
].i
!= AEABI_enum_unused
)
10171 if (out_attr
[i
].i
== AEABI_enum_unused
10172 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
10174 /* The existing object is compatible with anything.
10175 Use whatever requirements the new object has. */
10176 out_attr
[i
].i
= in_attr
[i
].i
;
10178 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
10179 && out_attr
[i
].i
!= in_attr
[i
].i
10180 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
10182 static const char *aeabi_enum_names
[] =
10183 { "", "variable-size", "32-bit", "" };
10184 const char *in_name
=
10185 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
10186 ? aeabi_enum_names
[in_attr
[i
].i
]
10188 const char *out_name
=
10189 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
10190 ? aeabi_enum_names
[out_attr
[i
].i
]
10193 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
10194 ibfd
, in_name
, out_name
);
10198 case Tag_ABI_VFP_args
:
10201 case Tag_ABI_WMMX_args
:
10202 if (in_attr
[i
].i
!= out_attr
[i
].i
)
10205 (_("error: %B uses iWMMXt register arguments, %B does not"),
10210 case Tag_compatibility
:
10211 /* Merged in target-independent code. */
10213 case Tag_ABI_HardFP_use
:
10214 /* 1 (SP) and 2 (DP) conflict, so combine to 3 (SP & DP). */
10215 if ((in_attr
[i
].i
== 1 && out_attr
[i
].i
== 2)
10216 || (in_attr
[i
].i
== 2 && out_attr
[i
].i
== 1))
10218 else if (in_attr
[i
].i
> out_attr
[i
].i
)
10219 out_attr
[i
].i
= in_attr
[i
].i
;
10221 case Tag_ABI_FP_16bit_format
:
10222 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
10224 if (in_attr
[i
].i
!= out_attr
[i
].i
)
10227 (_("error: fp16 format mismatch between %B and %B"),
10232 if (in_attr
[i
].i
!= 0)
10233 out_attr
[i
].i
= in_attr
[i
].i
;
10237 /* This tag is set to zero if we can use UDIV and SDIV in Thumb
10238 mode on a v7-M or v7-R CPU; to one if we can not use UDIV or
10239 SDIV at all; and to two if we can use UDIV or SDIV on a v7-A
10240 CPU. We will merge as follows: If the input attribute's value
10241 is one then the output attribute's value remains unchanged. If
10242 the input attribute's value is zero or two then if the output
10243 attribute's value is one the output value is set to the input
10244 value, otherwise the output value must be the same as the
10246 if (in_attr
[i
].i
!= 1 && out_attr
[i
].i
!= 1)
10248 if (in_attr
[i
].i
!= out_attr
[i
].i
)
10251 (_("DIV usage mismatch between %B and %B"),
10257 if (in_attr
[i
].i
!= 1)
10258 out_attr
[i
].i
= in_attr
[i
].i
;
10262 case Tag_MPextension_use_legacy
:
10263 /* We don't output objects with Tag_MPextension_use_legacy - we
10264 move the value to Tag_MPextension_use. */
10265 if (in_attr
[i
].i
!= 0 && in_attr
[Tag_MPextension_use
].i
!= 0)
10267 if (in_attr
[Tag_MPextension_use
].i
!= in_attr
[i
].i
)
10270 (_("%B has has both the current and legacy "
10271 "Tag_MPextension_use attributes"),
10277 if (in_attr
[i
].i
> out_attr
[Tag_MPextension_use
].i
)
10278 out_attr
[Tag_MPextension_use
] = in_attr
[i
];
10282 case Tag_nodefaults
:
10283 /* This tag is set if it exists, but the value is unused (and is
10284 typically zero). We don't actually need to do anything here -
10285 the merge happens automatically when the type flags are merged
10288 case Tag_also_compatible_with
:
10289 /* Already done in Tag_CPU_arch. */
10291 case Tag_conformance
:
10292 /* Keep the attribute if it matches. Throw it away otherwise.
10293 No attribute means no claim to conform. */
10294 if (!in_attr
[i
].s
|| !out_attr
[i
].s
10295 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
10296 out_attr
[i
].s
= NULL
;
10301 bfd
*err_bfd
= NULL
;
10303 /* The "known_obj_attributes" table does contain some undefined
10304 attributes. Ensure that there are unused. */
10305 if (out_attr
[i
].i
!= 0 || out_attr
[i
].s
!= NULL
)
10307 else if (in_attr
[i
].i
!= 0 || in_attr
[i
].s
!= NULL
)
10310 if (err_bfd
!= NULL
)
10312 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
10313 if ((i
& 127) < 64)
10316 (_("%B: Unknown mandatory EABI object attribute %d"),
10318 bfd_set_error (bfd_error_bad_value
);
10324 (_("Warning: %B: Unknown EABI object attribute %d"),
10329 /* Only pass on attributes that match in both inputs. */
10330 if (in_attr
[i
].i
!= out_attr
[i
].i
10331 || in_attr
[i
].s
!= out_attr
[i
].s
10332 || (in_attr
[i
].s
!= NULL
&& out_attr
[i
].s
!= NULL
10333 && strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0))
10336 out_attr
[i
].s
= NULL
;
10341 /* If out_attr was copied from in_attr then it won't have a type yet. */
10342 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
10343 out_attr
[i
].type
= in_attr
[i
].type
;
10346 /* Merge Tag_compatibility attributes and any common GNU ones. */
10347 if (!_bfd_elf_merge_object_attributes (ibfd
, obfd
))
10350 /* Check for any attributes not known on ARM. */
10351 in_list
= elf_other_obj_attributes_proc (ibfd
);
10352 out_listp
= &elf_other_obj_attributes_proc (obfd
);
10353 out_list
= *out_listp
;
10355 for (; in_list
|| out_list
; )
10357 bfd
*err_bfd
= NULL
;
10360 /* The tags for each list are in numerical order. */
10361 /* If the tags are equal, then merge. */
10362 if (out_list
&& (!in_list
|| in_list
->tag
> out_list
->tag
))
10364 /* This attribute only exists in obfd. We can't merge, and we don't
10365 know what the tag means, so delete it. */
10367 err_tag
= out_list
->tag
;
10368 *out_listp
= out_list
->next
;
10369 out_list
= *out_listp
;
10371 else if (in_list
&& (!out_list
|| in_list
->tag
< out_list
->tag
))
10373 /* This attribute only exists in ibfd. We can't merge, and we don't
10374 know what the tag means, so ignore it. */
10376 err_tag
= in_list
->tag
;
10377 in_list
= in_list
->next
;
10379 else /* The tags are equal. */
10381 /* As present, all attributes in the list are unknown, and
10382 therefore can't be merged meaningfully. */
10384 err_tag
= out_list
->tag
;
10386 /* Only pass on attributes that match in both inputs. */
10387 if (in_list
->attr
.i
!= out_list
->attr
.i
10388 || in_list
->attr
.s
!= out_list
->attr
.s
10389 || (in_list
->attr
.s
&& out_list
->attr
.s
10390 && strcmp (in_list
->attr
.s
, out_list
->attr
.s
) != 0))
10392 /* No match. Delete the attribute. */
10393 *out_listp
= out_list
->next
;
10394 out_list
= *out_listp
;
10398 /* Matched. Keep the attribute and move to the next. */
10399 out_list
= out_list
->next
;
10400 in_list
= in_list
->next
;
10406 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
10407 if ((err_tag
& 127) < 64)
10410 (_("%B: Unknown mandatory EABI object attribute %d"),
10412 bfd_set_error (bfd_error_bad_value
);
10418 (_("Warning: %B: Unknown EABI object attribute %d"),
10427 /* Return TRUE if the two EABI versions are incompatible. */
10430 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
10432 /* v4 and v5 are the same spec before and after it was released,
10433 so allow mixing them. */
10434 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
10435 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
10438 return (iver
== over
);
10441 /* Merge backend specific data from an object file to the output
10442 object file when linking. */
10445 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
);
10447 /* Display the flags field. */
10450 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
10452 FILE * file
= (FILE *) ptr
;
10453 unsigned long flags
;
10455 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
10457 /* Print normal ELF private data. */
10458 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
10460 flags
= elf_elfheader (abfd
)->e_flags
;
10461 /* Ignore init flag - it may not be set, despite the flags field
10462 containing valid data. */
10464 /* xgettext:c-format */
10465 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
10467 switch (EF_ARM_EABI_VERSION (flags
))
10469 case EF_ARM_EABI_UNKNOWN
:
10470 /* The following flag bits are GNU extensions and not part of the
10471 official ARM ELF extended ABI. Hence they are only decoded if
10472 the EABI version is not set. */
10473 if (flags
& EF_ARM_INTERWORK
)
10474 fprintf (file
, _(" [interworking enabled]"));
10476 if (flags
& EF_ARM_APCS_26
)
10477 fprintf (file
, " [APCS-26]");
10479 fprintf (file
, " [APCS-32]");
10481 if (flags
& EF_ARM_VFP_FLOAT
)
10482 fprintf (file
, _(" [VFP float format]"));
10483 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
10484 fprintf (file
, _(" [Maverick float format]"));
10486 fprintf (file
, _(" [FPA float format]"));
10488 if (flags
& EF_ARM_APCS_FLOAT
)
10489 fprintf (file
, _(" [floats passed in float registers]"));
10491 if (flags
& EF_ARM_PIC
)
10492 fprintf (file
, _(" [position independent]"));
10494 if (flags
& EF_ARM_NEW_ABI
)
10495 fprintf (file
, _(" [new ABI]"));
10497 if (flags
& EF_ARM_OLD_ABI
)
10498 fprintf (file
, _(" [old ABI]"));
10500 if (flags
& EF_ARM_SOFT_FLOAT
)
10501 fprintf (file
, _(" [software FP]"));
10503 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
10504 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
10505 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
10506 | EF_ARM_MAVERICK_FLOAT
);
10509 case EF_ARM_EABI_VER1
:
10510 fprintf (file
, _(" [Version1 EABI]"));
10512 if (flags
& EF_ARM_SYMSARESORTED
)
10513 fprintf (file
, _(" [sorted symbol table]"));
10515 fprintf (file
, _(" [unsorted symbol table]"));
10517 flags
&= ~ EF_ARM_SYMSARESORTED
;
10520 case EF_ARM_EABI_VER2
:
10521 fprintf (file
, _(" [Version2 EABI]"));
10523 if (flags
& EF_ARM_SYMSARESORTED
)
10524 fprintf (file
, _(" [sorted symbol table]"));
10526 fprintf (file
, _(" [unsorted symbol table]"));
10528 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
10529 fprintf (file
, _(" [dynamic symbols use segment index]"));
10531 if (flags
& EF_ARM_MAPSYMSFIRST
)
10532 fprintf (file
, _(" [mapping symbols precede others]"));
10534 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
10535 | EF_ARM_MAPSYMSFIRST
);
10538 case EF_ARM_EABI_VER3
:
10539 fprintf (file
, _(" [Version3 EABI]"));
10542 case EF_ARM_EABI_VER4
:
10543 fprintf (file
, _(" [Version4 EABI]"));
10546 case EF_ARM_EABI_VER5
:
10547 fprintf (file
, _(" [Version5 EABI]"));
10549 if (flags
& EF_ARM_BE8
)
10550 fprintf (file
, _(" [BE8]"));
10552 if (flags
& EF_ARM_LE8
)
10553 fprintf (file
, _(" [LE8]"));
10555 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
10559 fprintf (file
, _(" <EABI version unrecognised>"));
10563 flags
&= ~ EF_ARM_EABIMASK
;
10565 if (flags
& EF_ARM_RELEXEC
)
10566 fprintf (file
, _(" [relocatable executable]"));
10568 if (flags
& EF_ARM_HASENTRY
)
10569 fprintf (file
, _(" [has entry point]"));
10571 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
10574 fprintf (file
, _("<Unrecognised flag bits set>"));
10576 fputc ('\n', file
);
10582 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
10584 switch (ELF_ST_TYPE (elf_sym
->st_info
))
10586 case STT_ARM_TFUNC
:
10587 return ELF_ST_TYPE (elf_sym
->st_info
);
10589 case STT_ARM_16BIT
:
10590 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
10591 This allows us to distinguish between data used by Thumb instructions
10592 and non-data (which is probably code) inside Thumb regions of an
10594 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
10595 return ELF_ST_TYPE (elf_sym
->st_info
);
10606 elf32_arm_gc_mark_hook (asection
*sec
,
10607 struct bfd_link_info
*info
,
10608 Elf_Internal_Rela
*rel
,
10609 struct elf_link_hash_entry
*h
,
10610 Elf_Internal_Sym
*sym
)
10613 switch (ELF32_R_TYPE (rel
->r_info
))
10615 case R_ARM_GNU_VTINHERIT
:
10616 case R_ARM_GNU_VTENTRY
:
10620 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
10623 /* Update the got entry reference counts for the section being removed. */
10626 elf32_arm_gc_sweep_hook (bfd
* abfd
,
10627 struct bfd_link_info
* info
,
10629 const Elf_Internal_Rela
* relocs
)
10631 Elf_Internal_Shdr
*symtab_hdr
;
10632 struct elf_link_hash_entry
**sym_hashes
;
10633 bfd_signed_vma
*local_got_refcounts
;
10634 const Elf_Internal_Rela
*rel
, *relend
;
10635 struct elf32_arm_link_hash_table
* globals
;
10637 if (info
->relocatable
)
10640 globals
= elf32_arm_hash_table (info
);
10641 if (globals
== NULL
)
10644 elf_section_data (sec
)->local_dynrel
= NULL
;
10646 symtab_hdr
= & elf_symtab_hdr (abfd
);
10647 sym_hashes
= elf_sym_hashes (abfd
);
10648 local_got_refcounts
= elf_local_got_refcounts (abfd
);
10650 check_use_blx (globals
);
10652 relend
= relocs
+ sec
->reloc_count
;
10653 for (rel
= relocs
; rel
< relend
; rel
++)
10655 unsigned long r_symndx
;
10656 struct elf_link_hash_entry
*h
= NULL
;
10659 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10660 if (r_symndx
>= symtab_hdr
->sh_info
)
10662 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
10663 while (h
->root
.type
== bfd_link_hash_indirect
10664 || h
->root
.type
== bfd_link_hash_warning
)
10665 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10668 r_type
= ELF32_R_TYPE (rel
->r_info
);
10669 r_type
= arm_real_reloc_type (globals
, r_type
);
10673 case R_ARM_GOT_PREL
:
10674 case R_ARM_TLS_GD32
:
10675 case R_ARM_TLS_IE32
:
10678 if (h
->got
.refcount
> 0)
10679 h
->got
.refcount
-= 1;
10681 else if (local_got_refcounts
!= NULL
)
10683 if (local_got_refcounts
[r_symndx
] > 0)
10684 local_got_refcounts
[r_symndx
] -= 1;
10688 case R_ARM_TLS_LDM32
:
10689 globals
->tls_ldm_got
.refcount
-= 1;
10693 case R_ARM_ABS32_NOI
:
10695 case R_ARM_REL32_NOI
:
10701 case R_ARM_THM_CALL
:
10702 case R_ARM_THM_JUMP24
:
10703 case R_ARM_THM_JUMP19
:
10704 case R_ARM_MOVW_ABS_NC
:
10705 case R_ARM_MOVT_ABS
:
10706 case R_ARM_MOVW_PREL_NC
:
10707 case R_ARM_MOVT_PREL
:
10708 case R_ARM_THM_MOVW_ABS_NC
:
10709 case R_ARM_THM_MOVT_ABS
:
10710 case R_ARM_THM_MOVW_PREL_NC
:
10711 case R_ARM_THM_MOVT_PREL
:
10712 /* Should the interworking branches be here also? */
10716 struct elf32_arm_link_hash_entry
*eh
;
10717 struct elf32_arm_relocs_copied
**pp
;
10718 struct elf32_arm_relocs_copied
*p
;
10720 eh
= (struct elf32_arm_link_hash_entry
*) h
;
10722 if (h
->plt
.refcount
> 0)
10724 h
->plt
.refcount
-= 1;
10725 if (r_type
== R_ARM_THM_CALL
)
10726 eh
->plt_maybe_thumb_refcount
--;
10728 if (r_type
== R_ARM_THM_JUMP24
10729 || r_type
== R_ARM_THM_JUMP19
)
10730 eh
->plt_thumb_refcount
--;
10733 if (r_type
== R_ARM_ABS32
10734 || r_type
== R_ARM_REL32
10735 || r_type
== R_ARM_ABS32_NOI
10736 || r_type
== R_ARM_REL32_NOI
)
10738 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
;
10740 if (p
->section
== sec
)
10743 if (ELF32_R_TYPE (rel
->r_info
) == R_ARM_REL32
10744 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_REL32_NOI
)
10762 /* Look through the relocs for a section during the first phase. */
10765 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
10766 asection
*sec
, const Elf_Internal_Rela
*relocs
)
10768 Elf_Internal_Shdr
*symtab_hdr
;
10769 struct elf_link_hash_entry
**sym_hashes
;
10770 const Elf_Internal_Rela
*rel
;
10771 const Elf_Internal_Rela
*rel_end
;
10774 bfd_vma
*local_got_offsets
;
10775 struct elf32_arm_link_hash_table
*htab
;
10776 bfd_boolean needs_plt
;
10777 unsigned long nsyms
;
10779 if (info
->relocatable
)
10782 BFD_ASSERT (is_arm_elf (abfd
));
10784 htab
= elf32_arm_hash_table (info
);
10790 /* Create dynamic sections for relocatable executables so that we can
10791 copy relocations. */
10792 if (htab
->root
.is_relocatable_executable
10793 && ! htab
->root
.dynamic_sections_created
)
10795 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
10799 dynobj
= elf_hash_table (info
)->dynobj
;
10800 local_got_offsets
= elf_local_got_offsets (abfd
);
10802 symtab_hdr
= & elf_symtab_hdr (abfd
);
10803 sym_hashes
= elf_sym_hashes (abfd
);
10804 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
10806 rel_end
= relocs
+ sec
->reloc_count
;
10807 for (rel
= relocs
; rel
< rel_end
; rel
++)
10809 struct elf_link_hash_entry
*h
;
10810 struct elf32_arm_link_hash_entry
*eh
;
10811 unsigned long r_symndx
;
10814 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10815 r_type
= ELF32_R_TYPE (rel
->r_info
);
10816 r_type
= arm_real_reloc_type (htab
, r_type
);
10818 if (r_symndx
>= nsyms
10819 /* PR 9934: It is possible to have relocations that do not
10820 refer to symbols, thus it is also possible to have an
10821 object file containing relocations but no symbol table. */
10822 && (r_symndx
> 0 || nsyms
> 0))
10824 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
10829 if (nsyms
== 0 || r_symndx
< symtab_hdr
->sh_info
)
10833 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
10834 while (h
->root
.type
== bfd_link_hash_indirect
10835 || h
->root
.type
== bfd_link_hash_warning
)
10836 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10839 eh
= (struct elf32_arm_link_hash_entry
*) h
;
10844 case R_ARM_GOT_PREL
:
10845 case R_ARM_TLS_GD32
:
10846 case R_ARM_TLS_IE32
:
10847 /* This symbol requires a global offset table entry. */
10849 int tls_type
, old_tls_type
;
10853 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
10854 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
10855 default: tls_type
= GOT_NORMAL
; break;
10861 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
10865 bfd_signed_vma
*local_got_refcounts
;
10867 /* This is a global offset table entry for a local symbol. */
10868 local_got_refcounts
= elf_local_got_refcounts (abfd
);
10869 if (local_got_refcounts
== NULL
)
10871 bfd_size_type size
;
10873 size
= symtab_hdr
->sh_info
;
10874 size
*= (sizeof (bfd_signed_vma
) + sizeof (char));
10875 local_got_refcounts
= (bfd_signed_vma
*)
10876 bfd_zalloc (abfd
, size
);
10877 if (local_got_refcounts
== NULL
)
10879 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
10880 elf32_arm_local_got_tls_type (abfd
)
10881 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
10883 local_got_refcounts
[r_symndx
] += 1;
10884 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
10887 /* We will already have issued an error message if there is a
10888 TLS / non-TLS mismatch, based on the symbol type. We don't
10889 support any linker relaxations. So just combine any TLS
10891 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
10892 && tls_type
!= GOT_NORMAL
)
10893 tls_type
|= old_tls_type
;
10895 if (old_tls_type
!= tls_type
)
10898 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
10900 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
10903 /* Fall through. */
10905 case R_ARM_TLS_LDM32
:
10906 if (r_type
== R_ARM_TLS_LDM32
)
10907 htab
->tls_ldm_got
.refcount
++;
10908 /* Fall through. */
10910 case R_ARM_GOTOFF32
:
10912 if (htab
->sgot
== NULL
)
10914 if (htab
->root
.dynobj
== NULL
)
10915 htab
->root
.dynobj
= abfd
;
10916 if (!create_got_section (htab
->root
.dynobj
, info
))
10922 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
10923 ldr __GOTT_INDEX__ offsets. */
10924 if (!htab
->vxworks_p
)
10926 /* Fall through. */
10933 case R_ARM_THM_CALL
:
10934 case R_ARM_THM_JUMP24
:
10935 case R_ARM_THM_JUMP19
:
10939 case R_ARM_MOVW_ABS_NC
:
10940 case R_ARM_MOVT_ABS
:
10941 case R_ARM_THM_MOVW_ABS_NC
:
10942 case R_ARM_THM_MOVT_ABS
:
10945 (*_bfd_error_handler
)
10946 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
10947 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
10948 (h
) ? h
->root
.root
.string
: "a local symbol");
10949 bfd_set_error (bfd_error_bad_value
);
10953 /* Fall through. */
10955 case R_ARM_ABS32_NOI
:
10957 case R_ARM_REL32_NOI
:
10958 case R_ARM_MOVW_PREL_NC
:
10959 case R_ARM_MOVT_PREL
:
10960 case R_ARM_THM_MOVW_PREL_NC
:
10961 case R_ARM_THM_MOVT_PREL
:
10965 /* Should the interworking branches be listed here? */
10968 /* If this reloc is in a read-only section, we might
10969 need a copy reloc. We can't check reliably at this
10970 stage whether the section is read-only, as input
10971 sections have not yet been mapped to output sections.
10972 Tentatively set the flag for now, and correct in
10973 adjust_dynamic_symbol. */
10975 h
->non_got_ref
= 1;
10977 /* We may need a .plt entry if the function this reloc
10978 refers to is in a different object. We can't tell for
10979 sure yet, because something later might force the
10984 /* If we create a PLT entry, this relocation will reference
10985 it, even if it's an ABS32 relocation. */
10986 h
->plt
.refcount
+= 1;
10988 /* It's too early to use htab->use_blx here, so we have to
10989 record possible blx references separately from
10990 relocs that definitely need a thumb stub. */
10992 if (r_type
== R_ARM_THM_CALL
)
10993 eh
->plt_maybe_thumb_refcount
+= 1;
10995 if (r_type
== R_ARM_THM_JUMP24
10996 || r_type
== R_ARM_THM_JUMP19
)
10997 eh
->plt_thumb_refcount
+= 1;
11000 /* If we are creating a shared library or relocatable executable,
11001 and this is a reloc against a global symbol, or a non PC
11002 relative reloc against a local symbol, then we need to copy
11003 the reloc into the shared library. However, if we are linking
11004 with -Bsymbolic, we do not need to copy a reloc against a
11005 global symbol which is defined in an object we are
11006 including in the link (i.e., DEF_REGULAR is set). At
11007 this point we have not seen all the input files, so it is
11008 possible that DEF_REGULAR is not set now but will be set
11009 later (it is never cleared). We account for that
11010 possibility below by storing information in the
11011 relocs_copied field of the hash table entry. */
11012 if ((info
->shared
|| htab
->root
.is_relocatable_executable
)
11013 && (sec
->flags
& SEC_ALLOC
) != 0
11014 && ((r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
)
11015 || (h
!= NULL
&& ! h
->needs_plt
11016 && (! info
->symbolic
|| ! h
->def_regular
))))
11018 struct elf32_arm_relocs_copied
*p
, **head
;
11020 /* When creating a shared object, we must copy these
11021 reloc types into the output file. We create a reloc
11022 section in dynobj and make room for this reloc. */
11023 if (sreloc
== NULL
)
11025 sreloc
= _bfd_elf_make_dynamic_reloc_section
11026 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
11028 if (sreloc
== NULL
)
11031 /* BPABI objects never have dynamic relocations mapped. */
11032 if (htab
->symbian_p
)
11036 flags
= bfd_get_section_flags (dynobj
, sreloc
);
11037 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
11038 bfd_set_section_flags (dynobj
, sreloc
, flags
);
11042 /* If this is a global symbol, we count the number of
11043 relocations we need for this symbol. */
11046 head
= &((struct elf32_arm_link_hash_entry
*) h
)->relocs_copied
;
11050 /* Track dynamic relocs needed for local syms too.
11051 We really need local syms available to do this
11052 easily. Oh well. */
11055 Elf_Internal_Sym
*isym
;
11057 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
11062 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
11066 vpp
= &elf_section_data (s
)->local_dynrel
;
11067 head
= (struct elf32_arm_relocs_copied
**) vpp
;
11071 if (p
== NULL
|| p
->section
!= sec
)
11073 bfd_size_type amt
= sizeof *p
;
11075 p
= (struct elf32_arm_relocs_copied
*)
11076 bfd_alloc (htab
->root
.dynobj
, amt
);
11086 if (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
11092 /* This relocation describes the C++ object vtable hierarchy.
11093 Reconstruct it for later use during GC. */
11094 case R_ARM_GNU_VTINHERIT
:
11095 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
11099 /* This relocation describes which C++ vtable entries are actually
11100 used. Record for later use during GC. */
11101 case R_ARM_GNU_VTENTRY
:
11102 BFD_ASSERT (h
!= NULL
);
11104 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
11113 /* Unwinding tables are not referenced directly. This pass marks them as
11114 required if the corresponding code section is marked. */
11117 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
11118 elf_gc_mark_hook_fn gc_mark_hook
)
11121 Elf_Internal_Shdr
**elf_shdrp
;
11124 /* Marking EH data may cause additional code sections to be marked,
11125 requiring multiple passes. */
11130 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
11134 if (! is_arm_elf (sub
))
11137 elf_shdrp
= elf_elfsections (sub
);
11138 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
11140 Elf_Internal_Shdr
*hdr
;
11142 hdr
= &elf_section_data (o
)->this_hdr
;
11143 if (hdr
->sh_type
== SHT_ARM_EXIDX
11145 && hdr
->sh_link
< elf_numsections (sub
)
11147 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
11150 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
11160 /* Treat mapping symbols as special target symbols. */
11163 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
11165 return bfd_is_arm_special_symbol_name (sym
->name
,
11166 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
11169 /* This is a copy of elf_find_function() from elf.c except that
11170 ARM mapping symbols are ignored when looking for function names
11171 and STT_ARM_TFUNC is considered to a function type. */
11174 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
11175 asection
* section
,
11176 asymbol
** symbols
,
11178 const char ** filename_ptr
,
11179 const char ** functionname_ptr
)
11181 const char * filename
= NULL
;
11182 asymbol
* func
= NULL
;
11183 bfd_vma low_func
= 0;
11186 for (p
= symbols
; *p
!= NULL
; p
++)
11188 elf_symbol_type
*q
;
11190 q
= (elf_symbol_type
*) *p
;
11192 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
11197 filename
= bfd_asymbol_name (&q
->symbol
);
11200 case STT_ARM_TFUNC
:
11202 /* Skip mapping symbols. */
11203 if ((q
->symbol
.flags
& BSF_LOCAL
)
11204 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
11205 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
11207 /* Fall through. */
11208 if (bfd_get_section (&q
->symbol
) == section
11209 && q
->symbol
.value
>= low_func
11210 && q
->symbol
.value
<= offset
)
11212 func
= (asymbol
*) q
;
11213 low_func
= q
->symbol
.value
;
11223 *filename_ptr
= filename
;
11224 if (functionname_ptr
)
11225 *functionname_ptr
= bfd_asymbol_name (func
);
11231 /* Find the nearest line to a particular section and offset, for error
11232 reporting. This code is a duplicate of the code in elf.c, except
11233 that it uses arm_elf_find_function. */
11236 elf32_arm_find_nearest_line (bfd
* abfd
,
11237 asection
* section
,
11238 asymbol
** symbols
,
11240 const char ** filename_ptr
,
11241 const char ** functionname_ptr
,
11242 unsigned int * line_ptr
)
11244 bfd_boolean found
= FALSE
;
11246 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
11248 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
11249 filename_ptr
, functionname_ptr
,
11251 & elf_tdata (abfd
)->dwarf2_find_line_info
))
11253 if (!*functionname_ptr
)
11254 arm_elf_find_function (abfd
, section
, symbols
, offset
,
11255 *filename_ptr
? NULL
: filename_ptr
,
11261 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
11262 & found
, filename_ptr
,
11263 functionname_ptr
, line_ptr
,
11264 & elf_tdata (abfd
)->line_info
))
11267 if (found
&& (*functionname_ptr
|| *line_ptr
))
11270 if (symbols
== NULL
)
11273 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
11274 filename_ptr
, functionname_ptr
))
11282 elf32_arm_find_inliner_info (bfd
* abfd
,
11283 const char ** filename_ptr
,
11284 const char ** functionname_ptr
,
11285 unsigned int * line_ptr
)
11288 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
11289 functionname_ptr
, line_ptr
,
11290 & elf_tdata (abfd
)->dwarf2_find_line_info
);
11294 /* Adjust a symbol defined by a dynamic object and referenced by a
11295 regular object. The current definition is in some section of the
11296 dynamic object, but we're not including those sections. We have to
11297 change the definition to something the rest of the link can
11301 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
11302 struct elf_link_hash_entry
* h
)
11306 struct elf32_arm_link_hash_entry
* eh
;
11307 struct elf32_arm_link_hash_table
*globals
;
11309 globals
= elf32_arm_hash_table (info
);
11310 if (globals
== NULL
)
11313 dynobj
= elf_hash_table (info
)->dynobj
;
11315 /* Make sure we know what is going on here. */
11316 BFD_ASSERT (dynobj
!= NULL
11318 || h
->u
.weakdef
!= NULL
11321 && !h
->def_regular
)));
11323 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11325 /* If this is a function, put it in the procedure linkage table. We
11326 will fill in the contents of the procedure linkage table later,
11327 when we know the address of the .got section. */
11328 if (h
->type
== STT_FUNC
|| h
->type
== STT_ARM_TFUNC
11331 if (h
->plt
.refcount
<= 0
11332 || SYMBOL_CALLS_LOCAL (info
, h
)
11333 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
11334 && h
->root
.type
== bfd_link_hash_undefweak
))
11336 /* This case can occur if we saw a PLT32 reloc in an input
11337 file, but the symbol was never referred to by a dynamic
11338 object, or if all references were garbage collected. In
11339 such a case, we don't actually need to build a procedure
11340 linkage table, and we can just do a PC24 reloc instead. */
11341 h
->plt
.offset
= (bfd_vma
) -1;
11342 eh
->plt_thumb_refcount
= 0;
11343 eh
->plt_maybe_thumb_refcount
= 0;
11351 /* It's possible that we incorrectly decided a .plt reloc was
11352 needed for an R_ARM_PC24 or similar reloc to a non-function sym
11353 in check_relocs. We can't decide accurately between function
11354 and non-function syms in check-relocs; Objects loaded later in
11355 the link may change h->type. So fix it now. */
11356 h
->plt
.offset
= (bfd_vma
) -1;
11357 eh
->plt_thumb_refcount
= 0;
11358 eh
->plt_maybe_thumb_refcount
= 0;
11361 /* If this is a weak symbol, and there is a real definition, the
11362 processor independent code will have arranged for us to see the
11363 real definition first, and we can just use the same value. */
11364 if (h
->u
.weakdef
!= NULL
)
11366 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
11367 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
11368 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
11369 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
11373 /* If there are no non-GOT references, we do not need a copy
11375 if (!h
->non_got_ref
)
11378 /* This is a reference to a symbol defined by a dynamic object which
11379 is not a function. */
11381 /* If we are creating a shared library, we must presume that the
11382 only references to the symbol are via the global offset table.
11383 For such cases we need not do anything here; the relocations will
11384 be handled correctly by relocate_section. Relocatable executables
11385 can reference data in shared objects directly, so we don't need to
11386 do anything here. */
11387 if (info
->shared
|| globals
->root
.is_relocatable_executable
)
11392 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
11393 h
->root
.root
.string
);
11397 /* We must allocate the symbol in our .dynbss section, which will
11398 become part of the .bss section of the executable. There will be
11399 an entry for this symbol in the .dynsym section. The dynamic
11400 object will contain position independent code, so all references
11401 from the dynamic object to this symbol will go through the global
11402 offset table. The dynamic linker will use the .dynsym entry to
11403 determine the address it must put in the global offset table, so
11404 both the dynamic object and the regular object will refer to the
11405 same memory location for the variable. */
11406 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
11407 BFD_ASSERT (s
!= NULL
);
11409 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
11410 copy the initial value out of the dynamic object and into the
11411 runtime process image. We need to remember the offset into the
11412 .rel(a).bss section we are going to use. */
11413 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
11417 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (globals
, ".bss"));
11418 BFD_ASSERT (srel
!= NULL
);
11419 srel
->size
+= RELOC_SIZE (globals
);
11423 return _bfd_elf_adjust_dynamic_copy (h
, s
);
11426 /* Allocate space in .plt, .got and associated reloc sections for
11430 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
11432 struct bfd_link_info
*info
;
11433 struct elf32_arm_link_hash_table
*htab
;
11434 struct elf32_arm_link_hash_entry
*eh
;
11435 struct elf32_arm_relocs_copied
*p
;
11436 bfd_signed_vma thumb_refs
;
11438 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11440 if (h
->root
.type
== bfd_link_hash_indirect
)
11443 if (h
->root
.type
== bfd_link_hash_warning
)
11444 /* When warning symbols are created, they **replace** the "real"
11445 entry in the hash table, thus we never get to see the real
11446 symbol in a hash traversal. So look at it now. */
11447 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11449 info
= (struct bfd_link_info
*) inf
;
11450 htab
= elf32_arm_hash_table (info
);
11454 if (htab
->root
.dynamic_sections_created
11455 && h
->plt
.refcount
> 0)
11457 /* Make sure this symbol is output as a dynamic symbol.
11458 Undefined weak syms won't yet be marked as dynamic. */
11459 if (h
->dynindx
== -1
11460 && !h
->forced_local
)
11462 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11467 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
11469 asection
*s
= htab
->splt
;
11471 /* If this is the first .plt entry, make room for the special
11474 s
->size
+= htab
->plt_header_size
;
11476 h
->plt
.offset
= s
->size
;
11478 /* If we will insert a Thumb trampoline before this PLT, leave room
11480 thumb_refs
= eh
->plt_thumb_refcount
;
11481 if (!htab
->use_blx
)
11482 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
11484 if (thumb_refs
> 0)
11486 h
->plt
.offset
+= PLT_THUMB_STUB_SIZE
;
11487 s
->size
+= PLT_THUMB_STUB_SIZE
;
11490 /* If this symbol is not defined in a regular file, and we are
11491 not generating a shared library, then set the symbol to this
11492 location in the .plt. This is required to make function
11493 pointers compare as equal between the normal executable and
11494 the shared library. */
11496 && !h
->def_regular
)
11498 h
->root
.u
.def
.section
= s
;
11499 h
->root
.u
.def
.value
= h
->plt
.offset
;
11501 /* Make sure the function is not marked as Thumb, in case
11502 it is the target of an ABS32 relocation, which will
11503 point to the PLT entry. */
11504 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
11505 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
11508 /* Make room for this entry. */
11509 s
->size
+= htab
->plt_entry_size
;
11511 if (!htab
->symbian_p
)
11513 /* We also need to make an entry in the .got.plt section, which
11514 will be placed in the .got section by the linker script. */
11515 eh
->plt_got_offset
= htab
->sgotplt
->size
;
11516 htab
->sgotplt
->size
+= 4;
11519 /* We also need to make an entry in the .rel(a).plt section. */
11520 htab
->srelplt
->size
+= RELOC_SIZE (htab
);
11522 /* VxWorks executables have a second set of relocations for
11523 each PLT entry. They go in a separate relocation section,
11524 which is processed by the kernel loader. */
11525 if (htab
->vxworks_p
&& !info
->shared
)
11527 /* There is a relocation for the initial PLT entry:
11528 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
11529 if (h
->plt
.offset
== htab
->plt_header_size
)
11530 htab
->srelplt2
->size
+= RELOC_SIZE (htab
);
11532 /* There are two extra relocations for each subsequent
11533 PLT entry: an R_ARM_32 relocation for the GOT entry,
11534 and an R_ARM_32 relocation for the PLT entry. */
11535 htab
->srelplt2
->size
+= RELOC_SIZE (htab
) * 2;
11540 h
->plt
.offset
= (bfd_vma
) -1;
11546 h
->plt
.offset
= (bfd_vma
) -1;
11550 if (h
->got
.refcount
> 0)
11554 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
11557 /* Make sure this symbol is output as a dynamic symbol.
11558 Undefined weak syms won't yet be marked as dynamic. */
11559 if (h
->dynindx
== -1
11560 && !h
->forced_local
)
11562 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11566 if (!htab
->symbian_p
)
11569 h
->got
.offset
= s
->size
;
11571 if (tls_type
== GOT_UNKNOWN
)
11574 if (tls_type
== GOT_NORMAL
)
11575 /* Non-TLS symbols need one GOT slot. */
11579 if (tls_type
& GOT_TLS_GD
)
11580 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
11582 if (tls_type
& GOT_TLS_IE
)
11583 /* R_ARM_TLS_IE32 needs one GOT slot. */
11587 dyn
= htab
->root
.dynamic_sections_created
;
11590 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
11592 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
11595 if (tls_type
!= GOT_NORMAL
11596 && (info
->shared
|| indx
!= 0)
11597 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11598 || h
->root
.type
!= bfd_link_hash_undefweak
))
11600 if (tls_type
& GOT_TLS_IE
)
11601 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11603 if (tls_type
& GOT_TLS_GD
)
11604 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11606 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
11607 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11609 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11610 || h
->root
.type
!= bfd_link_hash_undefweak
)
11612 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
11613 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11617 h
->got
.offset
= (bfd_vma
) -1;
11619 /* Allocate stubs for exported Thumb functions on v4t. */
11620 if (!htab
->use_blx
&& h
->dynindx
!= -1
11622 && ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
11623 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
11625 struct elf_link_hash_entry
* th
;
11626 struct bfd_link_hash_entry
* bh
;
11627 struct elf_link_hash_entry
* myh
;
11631 /* Create a new symbol to regist the real location of the function. */
11632 s
= h
->root
.u
.def
.section
;
11633 sprintf (name
, "__real_%s", h
->root
.root
.string
);
11634 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
11635 name
, BSF_GLOBAL
, s
,
11636 h
->root
.u
.def
.value
,
11637 NULL
, TRUE
, FALSE
, &bh
);
11639 myh
= (struct elf_link_hash_entry
*) bh
;
11640 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_ARM_TFUNC
);
11641 myh
->forced_local
= 1;
11642 eh
->export_glue
= myh
;
11643 th
= record_arm_to_thumb_glue (info
, h
);
11644 /* Point the symbol at the stub. */
11645 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
11646 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
11647 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
11650 if (eh
->relocs_copied
== NULL
)
11653 /* In the shared -Bsymbolic case, discard space allocated for
11654 dynamic pc-relative relocs against symbols which turn out to be
11655 defined in regular objects. For the normal shared case, discard
11656 space for pc-relative relocs that have become local due to symbol
11657 visibility changes. */
11659 if (info
->shared
|| htab
->root
.is_relocatable_executable
)
11661 /* The only relocs that use pc_count are R_ARM_REL32 and
11662 R_ARM_REL32_NOI, which will appear on something like
11663 ".long foo - .". We want calls to protected symbols to resolve
11664 directly to the function rather than going via the plt. If people
11665 want function pointer comparisons to work as expected then they
11666 should avoid writing assembly like ".long foo - .". */
11667 if (SYMBOL_CALLS_LOCAL (info
, h
))
11669 struct elf32_arm_relocs_copied
**pp
;
11671 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
; )
11673 p
->count
-= p
->pc_count
;
11682 if (htab
->vxworks_p
)
11684 struct elf32_arm_relocs_copied
**pp
;
11686 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
; )
11688 if (strcmp (p
->section
->output_section
->name
, ".tls_vars") == 0)
11695 /* Also discard relocs on undefined weak syms with non-default
11697 if (eh
->relocs_copied
!= NULL
11698 && h
->root
.type
== bfd_link_hash_undefweak
)
11700 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
11701 eh
->relocs_copied
= NULL
;
11703 /* Make sure undefined weak symbols are output as a dynamic
11705 else if (h
->dynindx
== -1
11706 && !h
->forced_local
)
11708 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11713 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
11714 && h
->root
.type
== bfd_link_hash_new
)
11716 /* Output absolute symbols so that we can create relocations
11717 against them. For normal symbols we output a relocation
11718 against the section that contains them. */
11719 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11726 /* For the non-shared case, discard space for relocs against
11727 symbols which turn out to need copy relocs or are not
11730 if (!h
->non_got_ref
11731 && ((h
->def_dynamic
11732 && !h
->def_regular
)
11733 || (htab
->root
.dynamic_sections_created
11734 && (h
->root
.type
== bfd_link_hash_undefweak
11735 || h
->root
.type
== bfd_link_hash_undefined
))))
11737 /* Make sure this symbol is output as a dynamic symbol.
11738 Undefined weak syms won't yet be marked as dynamic. */
11739 if (h
->dynindx
== -1
11740 && !h
->forced_local
)
11742 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
11746 /* If that succeeded, we know we'll be keeping all the
11748 if (h
->dynindx
!= -1)
11752 eh
->relocs_copied
= NULL
;
11757 /* Finally, allocate space. */
11758 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
11760 asection
*sreloc
= elf_section_data (p
->section
)->sreloc
;
11761 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
11767 /* Find any dynamic relocs that apply to read-only sections. */
11770 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
11772 struct elf32_arm_link_hash_entry
* eh
;
11773 struct elf32_arm_relocs_copied
* p
;
11775 if (h
->root
.type
== bfd_link_hash_warning
)
11776 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11778 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11779 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
11781 asection
*s
= p
->section
;
11783 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
11785 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
11787 info
->flags
|= DF_TEXTREL
;
11789 /* Not an error, just cut short the traversal. */
11797 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
11800 struct elf32_arm_link_hash_table
*globals
;
11802 globals
= elf32_arm_hash_table (info
);
11803 if (globals
== NULL
)
11806 globals
->byteswap_code
= byteswap_code
;
11809 /* Set the sizes of the dynamic sections. */
11812 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
11813 struct bfd_link_info
* info
)
11818 bfd_boolean relocs
;
11820 struct elf32_arm_link_hash_table
*htab
;
11822 htab
= elf32_arm_hash_table (info
);
11826 dynobj
= elf_hash_table (info
)->dynobj
;
11827 BFD_ASSERT (dynobj
!= NULL
);
11828 check_use_blx (htab
);
11830 if (elf_hash_table (info
)->dynamic_sections_created
)
11832 /* Set the contents of the .interp section to the interpreter. */
11833 if (info
->executable
)
11835 s
= bfd_get_section_by_name (dynobj
, ".interp");
11836 BFD_ASSERT (s
!= NULL
);
11837 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
11838 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
11842 /* Set up .got offsets for local syms, and space for local dynamic
11844 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11846 bfd_signed_vma
*local_got
;
11847 bfd_signed_vma
*end_local_got
;
11848 char *local_tls_type
;
11849 bfd_size_type locsymcount
;
11850 Elf_Internal_Shdr
*symtab_hdr
;
11852 bfd_boolean is_vxworks
= htab
->vxworks_p
;
11854 if (! is_arm_elf (ibfd
))
11857 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
11859 struct elf32_arm_relocs_copied
*p
;
11861 for (p
= (struct elf32_arm_relocs_copied
*)
11862 elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
11864 if (!bfd_is_abs_section (p
->section
)
11865 && bfd_is_abs_section (p
->section
->output_section
))
11867 /* Input section has been discarded, either because
11868 it is a copy of a linkonce section or due to
11869 linker script /DISCARD/, so we'll be discarding
11872 else if (is_vxworks
11873 && strcmp (p
->section
->output_section
->name
,
11876 /* Relocations in vxworks .tls_vars sections are
11877 handled specially by the loader. */
11879 else if (p
->count
!= 0)
11881 srel
= elf_section_data (p
->section
)->sreloc
;
11882 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
11883 if ((p
->section
->output_section
->flags
& SEC_READONLY
) != 0)
11884 info
->flags
|= DF_TEXTREL
;
11889 local_got
= elf_local_got_refcounts (ibfd
);
11893 symtab_hdr
= & elf_symtab_hdr (ibfd
);
11894 locsymcount
= symtab_hdr
->sh_info
;
11895 end_local_got
= local_got
+ locsymcount
;
11896 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
11898 srel
= htab
->srelgot
;
11899 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
11901 if (*local_got
> 0)
11903 *local_got
= s
->size
;
11904 if (*local_tls_type
& GOT_TLS_GD
)
11905 /* TLS_GD relocs need an 8-byte structure in the GOT. */
11907 if (*local_tls_type
& GOT_TLS_IE
)
11909 if (*local_tls_type
== GOT_NORMAL
)
11912 if (info
->shared
|| *local_tls_type
== GOT_TLS_GD
)
11913 srel
->size
+= RELOC_SIZE (htab
);
11916 *local_got
= (bfd_vma
) -1;
11920 if (htab
->tls_ldm_got
.refcount
> 0)
11922 /* Allocate two GOT entries and one dynamic relocation (if necessary)
11923 for R_ARM_TLS_LDM32 relocations. */
11924 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
11925 htab
->sgot
->size
+= 8;
11927 htab
->srelgot
->size
+= RELOC_SIZE (htab
);
11930 htab
->tls_ldm_got
.offset
= -1;
11932 /* Allocate global sym .plt and .got entries, and space for global
11933 sym dynamic relocs. */
11934 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs
, info
);
11936 /* Here we rummage through the found bfds to collect glue information. */
11937 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11939 if (! is_arm_elf (ibfd
))
11942 /* Initialise mapping tables for code/data. */
11943 bfd_elf32_arm_init_maps (ibfd
);
11945 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
11946 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
))
11947 /* xgettext:c-format */
11948 _bfd_error_handler (_("Errors encountered processing file %s"),
11952 /* Allocate space for the glue sections now that we've sized them. */
11953 bfd_elf32_arm_allocate_interworking_sections (info
);
11955 /* The check_relocs and adjust_dynamic_symbol entry points have
11956 determined the sizes of the various dynamic sections. Allocate
11957 memory for them. */
11960 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
11964 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
11967 /* It's OK to base decisions on the section name, because none
11968 of the dynobj section names depend upon the input files. */
11969 name
= bfd_get_section_name (dynobj
, s
);
11971 if (strcmp (name
, ".plt") == 0)
11973 /* Remember whether there is a PLT. */
11974 plt
= s
->size
!= 0;
11976 else if (CONST_STRNEQ (name
, ".rel"))
11980 /* Remember whether there are any reloc sections other
11981 than .rel(a).plt and .rela.plt.unloaded. */
11982 if (s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
11985 /* We use the reloc_count field as a counter if we need
11986 to copy relocs into the output file. */
11987 s
->reloc_count
= 0;
11990 else if (! CONST_STRNEQ (name
, ".got")
11991 && strcmp (name
, ".dynbss") != 0)
11993 /* It's not one of our sections, so don't allocate space. */
11999 /* If we don't need this section, strip it from the
12000 output file. This is mostly to handle .rel(a).bss and
12001 .rel(a).plt. We must create both sections in
12002 create_dynamic_sections, because they must be created
12003 before the linker maps input sections to output
12004 sections. The linker does that before
12005 adjust_dynamic_symbol is called, and it is that
12006 function which decides whether anything needs to go
12007 into these sections. */
12008 s
->flags
|= SEC_EXCLUDE
;
12012 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
12015 /* Allocate memory for the section contents. */
12016 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
12017 if (s
->contents
== NULL
)
12021 if (elf_hash_table (info
)->dynamic_sections_created
)
12023 /* Add some entries to the .dynamic section. We fill in the
12024 values later, in elf32_arm_finish_dynamic_sections, but we
12025 must add the entries now so that we get the correct size for
12026 the .dynamic section. The DT_DEBUG entry is filled in by the
12027 dynamic linker and used by the debugger. */
12028 #define add_dynamic_entry(TAG, VAL) \
12029 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
12031 if (info
->executable
)
12033 if (!add_dynamic_entry (DT_DEBUG
, 0))
12039 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
12040 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
12041 || !add_dynamic_entry (DT_PLTREL
,
12042 htab
->use_rel
? DT_REL
: DT_RELA
)
12043 || !add_dynamic_entry (DT_JMPREL
, 0))
12051 if (!add_dynamic_entry (DT_REL
, 0)
12052 || !add_dynamic_entry (DT_RELSZ
, 0)
12053 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
12058 if (!add_dynamic_entry (DT_RELA
, 0)
12059 || !add_dynamic_entry (DT_RELASZ
, 0)
12060 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
12065 /* If any dynamic relocs apply to a read-only section,
12066 then we need a DT_TEXTREL entry. */
12067 if ((info
->flags
& DF_TEXTREL
) == 0)
12068 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
12071 if ((info
->flags
& DF_TEXTREL
) != 0)
12073 if (!add_dynamic_entry (DT_TEXTREL
, 0))
12076 if (htab
->vxworks_p
12077 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
12080 #undef add_dynamic_entry
12085 /* Finish up dynamic symbol handling. We set the contents of various
12086 dynamic sections here. */
12089 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
12090 struct bfd_link_info
* info
,
12091 struct elf_link_hash_entry
* h
,
12092 Elf_Internal_Sym
* sym
)
12095 struct elf32_arm_link_hash_table
*htab
;
12096 struct elf32_arm_link_hash_entry
*eh
;
12098 dynobj
= elf_hash_table (info
)->dynobj
;
12099 htab
= elf32_arm_hash_table (info
);
12103 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12105 if (h
->plt
.offset
!= (bfd_vma
) -1)
12111 Elf_Internal_Rela rel
;
12113 /* This symbol has an entry in the procedure linkage table. Set
12116 BFD_ASSERT (h
->dynindx
!= -1);
12118 splt
= bfd_get_section_by_name (dynobj
, ".plt");
12119 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (htab
, ".plt"));
12120 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
12122 /* Fill in the entry in the procedure linkage table. */
12123 if (htab
->symbian_p
)
12125 put_arm_insn (htab
, output_bfd
,
12126 elf32_arm_symbian_plt_entry
[0],
12127 splt
->contents
+ h
->plt
.offset
);
12128 bfd_put_32 (output_bfd
,
12129 elf32_arm_symbian_plt_entry
[1],
12130 splt
->contents
+ h
->plt
.offset
+ 4);
12132 /* Fill in the entry in the .rel.plt section. */
12133 rel
.r_offset
= (splt
->output_section
->vma
12134 + splt
->output_offset
12135 + h
->plt
.offset
+ 4);
12136 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
12138 /* Get the index in the procedure linkage table which
12139 corresponds to this symbol. This is the index of this symbol
12140 in all the symbols for which we are making plt entries. The
12141 first entry in the procedure linkage table is reserved. */
12142 plt_index
= ((h
->plt
.offset
- htab
->plt_header_size
)
12143 / htab
->plt_entry_size
);
12147 bfd_vma got_offset
, got_address
, plt_address
;
12148 bfd_vma got_displacement
;
12152 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
12153 BFD_ASSERT (sgot
!= NULL
);
12155 /* Get the offset into the .got.plt table of the entry that
12156 corresponds to this function. */
12157 got_offset
= eh
->plt_got_offset
;
12159 /* Get the index in the procedure linkage table which
12160 corresponds to this symbol. This is the index of this symbol
12161 in all the symbols for which we are making plt entries. The
12162 first three entries in .got.plt are reserved; after that
12163 symbols appear in the same order as in .plt. */
12164 plt_index
= (got_offset
- 12) / 4;
12166 /* Calculate the address of the GOT entry. */
12167 got_address
= (sgot
->output_section
->vma
12168 + sgot
->output_offset
12171 /* ...and the address of the PLT entry. */
12172 plt_address
= (splt
->output_section
->vma
12173 + splt
->output_offset
12176 ptr
= htab
->splt
->contents
+ h
->plt
.offset
;
12177 if (htab
->vxworks_p
&& info
->shared
)
12182 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
12184 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
12186 val
|= got_address
- sgot
->output_section
->vma
;
12188 val
|= plt_index
* RELOC_SIZE (htab
);
12189 if (i
== 2 || i
== 5)
12190 bfd_put_32 (output_bfd
, val
, ptr
);
12192 put_arm_insn (htab
, output_bfd
, val
, ptr
);
12195 else if (htab
->vxworks_p
)
12200 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
12202 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
12204 val
|= got_address
;
12206 val
|= 0xffffff & -((h
->plt
.offset
+ i
* 4 + 8) >> 2);
12208 val
|= plt_index
* RELOC_SIZE (htab
);
12209 if (i
== 2 || i
== 5)
12210 bfd_put_32 (output_bfd
, val
, ptr
);
12212 put_arm_insn (htab
, output_bfd
, val
, ptr
);
12215 loc
= (htab
->srelplt2
->contents
12216 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
12218 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
12219 referencing the GOT for this PLT entry. */
12220 rel
.r_offset
= plt_address
+ 8;
12221 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12222 rel
.r_addend
= got_offset
;
12223 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12224 loc
+= RELOC_SIZE (htab
);
12226 /* Create the R_ARM_ABS32 relocation referencing the
12227 beginning of the PLT for this GOT entry. */
12228 rel
.r_offset
= got_address
;
12229 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
12231 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12235 bfd_signed_vma thumb_refs
;
12236 /* Calculate the displacement between the PLT slot and the
12237 entry in the GOT. The eight-byte offset accounts for the
12238 value produced by adding to pc in the first instruction
12239 of the PLT stub. */
12240 got_displacement
= got_address
- (plt_address
+ 8);
12242 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
12244 thumb_refs
= eh
->plt_thumb_refcount
;
12245 if (!htab
->use_blx
)
12246 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
12248 if (thumb_refs
> 0)
12250 put_thumb_insn (htab
, output_bfd
,
12251 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
12252 put_thumb_insn (htab
, output_bfd
,
12253 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
12256 put_arm_insn (htab
, output_bfd
,
12257 elf32_arm_plt_entry
[0]
12258 | ((got_displacement
& 0x0ff00000) >> 20),
12260 put_arm_insn (htab
, output_bfd
,
12261 elf32_arm_plt_entry
[1]
12262 | ((got_displacement
& 0x000ff000) >> 12),
12264 put_arm_insn (htab
, output_bfd
,
12265 elf32_arm_plt_entry
[2]
12266 | (got_displacement
& 0x00000fff),
12268 #ifdef FOUR_WORD_PLT
12269 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3], ptr
+ 12);
12273 /* Fill in the entry in the global offset table. */
12274 bfd_put_32 (output_bfd
,
12275 (splt
->output_section
->vma
12276 + splt
->output_offset
),
12277 sgot
->contents
+ got_offset
);
12279 /* Fill in the entry in the .rel(a).plt section. */
12281 rel
.r_offset
= got_address
;
12282 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_JUMP_SLOT
);
12285 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
12286 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12288 if (!h
->def_regular
)
12290 /* Mark the symbol as undefined, rather than as defined in
12291 the .plt section. Leave the value alone. */
12292 sym
->st_shndx
= SHN_UNDEF
;
12293 /* If the symbol is weak, we do need to clear the value.
12294 Otherwise, the PLT entry would provide a definition for
12295 the symbol even if the symbol wasn't defined anywhere,
12296 and so the symbol would never be NULL. */
12297 if (!h
->ref_regular_nonweak
)
12302 if (h
->got
.offset
!= (bfd_vma
) -1
12303 && (elf32_arm_hash_entry (h
)->tls_type
& GOT_TLS_GD
) == 0
12304 && (elf32_arm_hash_entry (h
)->tls_type
& GOT_TLS_IE
) == 0)
12308 Elf_Internal_Rela rel
;
12312 /* This symbol has an entry in the global offset table. Set it
12314 sgot
= bfd_get_section_by_name (dynobj
, ".got");
12315 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (htab
, ".got"));
12316 BFD_ASSERT (sgot
!= NULL
&& srel
!= NULL
);
12318 offset
= (h
->got
.offset
& ~(bfd_vma
) 1);
12320 rel
.r_offset
= (sgot
->output_section
->vma
12321 + sgot
->output_offset
12324 /* If this is a static link, or it is a -Bsymbolic link and the
12325 symbol is defined locally or was forced to be local because
12326 of a version file, we just want to emit a RELATIVE reloc.
12327 The entry in the global offset table will already have been
12328 initialized in the relocate_section function. */
12330 && SYMBOL_REFERENCES_LOCAL (info
, h
))
12332 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
12333 rel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
12334 if (!htab
->use_rel
)
12336 rel
.r_addend
= bfd_get_32 (output_bfd
, sgot
->contents
+ offset
);
12337 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
12342 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
12343 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
12344 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
12347 loc
= srel
->contents
+ srel
->reloc_count
++ * RELOC_SIZE (htab
);
12348 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12354 Elf_Internal_Rela rel
;
12357 /* This symbol needs a copy reloc. Set it up. */
12358 BFD_ASSERT (h
->dynindx
!= -1
12359 && (h
->root
.type
== bfd_link_hash_defined
12360 || h
->root
.type
== bfd_link_hash_defweak
));
12362 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
12363 RELOC_SECTION (htab
, ".bss"));
12364 BFD_ASSERT (s
!= NULL
);
12367 rel
.r_offset
= (h
->root
.u
.def
.value
12368 + h
->root
.u
.def
.section
->output_section
->vma
12369 + h
->root
.u
.def
.section
->output_offset
);
12370 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
12371 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
12372 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
12375 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
12376 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
12377 to the ".got" section. */
12378 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
12379 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
12380 sym
->st_shndx
= SHN_ABS
;
12385 /* Finish up the dynamic sections. */
12388 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
12393 struct elf32_arm_link_hash_table
*htab
;
12395 htab
= elf32_arm_hash_table (info
);
12399 dynobj
= elf_hash_table (info
)->dynobj
;
12401 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
12402 BFD_ASSERT (htab
->symbian_p
|| sgot
!= NULL
);
12403 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
12405 if (elf_hash_table (info
)->dynamic_sections_created
)
12408 Elf32_External_Dyn
*dyncon
, *dynconend
;
12410 splt
= bfd_get_section_by_name (dynobj
, ".plt");
12411 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
12413 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
12414 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
12416 for (; dyncon
< dynconend
; dyncon
++)
12418 Elf_Internal_Dyn dyn
;
12422 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
12429 if (htab
->vxworks_p
12430 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
12431 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12436 goto get_vma_if_bpabi
;
12439 goto get_vma_if_bpabi
;
12442 goto get_vma_if_bpabi
;
12444 name
= ".gnu.version";
12445 goto get_vma_if_bpabi
;
12447 name
= ".gnu.version_d";
12448 goto get_vma_if_bpabi
;
12450 name
= ".gnu.version_r";
12451 goto get_vma_if_bpabi
;
12457 name
= RELOC_SECTION (htab
, ".plt");
12459 s
= bfd_get_section_by_name (output_bfd
, name
);
12460 BFD_ASSERT (s
!= NULL
);
12461 if (!htab
->symbian_p
)
12462 dyn
.d_un
.d_ptr
= s
->vma
;
12464 /* In the BPABI, tags in the PT_DYNAMIC section point
12465 at the file offset, not the memory address, for the
12466 convenience of the post linker. */
12467 dyn
.d_un
.d_ptr
= s
->filepos
;
12468 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12472 if (htab
->symbian_p
)
12477 s
= bfd_get_section_by_name (output_bfd
,
12478 RELOC_SECTION (htab
, ".plt"));
12479 BFD_ASSERT (s
!= NULL
);
12480 dyn
.d_un
.d_val
= s
->size
;
12481 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12486 if (!htab
->symbian_p
)
12488 /* My reading of the SVR4 ABI indicates that the
12489 procedure linkage table relocs (DT_JMPREL) should be
12490 included in the overall relocs (DT_REL). This is
12491 what Solaris does. However, UnixWare can not handle
12492 that case. Therefore, we override the DT_RELSZ entry
12493 here to make it not include the JMPREL relocs. Since
12494 the linker script arranges for .rel(a).plt to follow all
12495 other relocation sections, we don't have to worry
12496 about changing the DT_REL entry. */
12497 s
= bfd_get_section_by_name (output_bfd
,
12498 RELOC_SECTION (htab
, ".plt"));
12500 dyn
.d_un
.d_val
-= s
->size
;
12501 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12504 /* Fall through. */
12508 /* In the BPABI, the DT_REL tag must point at the file
12509 offset, not the VMA, of the first relocation
12510 section. So, we use code similar to that in
12511 elflink.c, but do not check for SHF_ALLOC on the
12512 relcoation section, since relocations sections are
12513 never allocated under the BPABI. The comments above
12514 about Unixware notwithstanding, we include all of the
12515 relocations here. */
12516 if (htab
->symbian_p
)
12519 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
12520 ? SHT_REL
: SHT_RELA
);
12521 dyn
.d_un
.d_val
= 0;
12522 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
12524 Elf_Internal_Shdr
*hdr
12525 = elf_elfsections (output_bfd
)[i
];
12526 if (hdr
->sh_type
== type
)
12528 if (dyn
.d_tag
== DT_RELSZ
12529 || dyn
.d_tag
== DT_RELASZ
)
12530 dyn
.d_un
.d_val
+= hdr
->sh_size
;
12531 else if ((ufile_ptr
) hdr
->sh_offset
12532 <= dyn
.d_un
.d_val
- 1)
12533 dyn
.d_un
.d_val
= hdr
->sh_offset
;
12536 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12540 /* Set the bottom bit of DT_INIT/FINI if the
12541 corresponding function is Thumb. */
12543 name
= info
->init_function
;
12546 name
= info
->fini_function
;
12548 /* If it wasn't set by elf_bfd_final_link
12549 then there is nothing to adjust. */
12550 if (dyn
.d_un
.d_val
!= 0)
12552 struct elf_link_hash_entry
* eh
;
12554 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
12555 FALSE
, FALSE
, TRUE
);
12557 && ELF_ST_TYPE (eh
->type
) == STT_ARM_TFUNC
)
12559 dyn
.d_un
.d_val
|= 1;
12560 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
12567 /* Fill in the first entry in the procedure linkage table. */
12568 if (splt
->size
> 0 && htab
->plt_header_size
)
12570 const bfd_vma
*plt0_entry
;
12571 bfd_vma got_address
, plt_address
, got_displacement
;
12573 /* Calculate the addresses of the GOT and PLT. */
12574 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
12575 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
12577 if (htab
->vxworks_p
)
12579 /* The VxWorks GOT is relocated by the dynamic linker.
12580 Therefore, we must emit relocations rather than simply
12581 computing the values now. */
12582 Elf_Internal_Rela rel
;
12584 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
12585 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
12586 splt
->contents
+ 0);
12587 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
12588 splt
->contents
+ 4);
12589 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
12590 splt
->contents
+ 8);
12591 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
12593 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
12594 rel
.r_offset
= plt_address
+ 12;
12595 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12597 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
12598 htab
->srelplt2
->contents
);
12602 got_displacement
= got_address
- (plt_address
+ 16);
12604 plt0_entry
= elf32_arm_plt0_entry
;
12605 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
12606 splt
->contents
+ 0);
12607 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
12608 splt
->contents
+ 4);
12609 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
12610 splt
->contents
+ 8);
12611 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
12612 splt
->contents
+ 12);
12614 #ifdef FOUR_WORD_PLT
12615 /* The displacement value goes in the otherwise-unused
12616 last word of the second entry. */
12617 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
12619 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
12624 /* UnixWare sets the entsize of .plt to 4, although that doesn't
12625 really seem like the right value. */
12626 if (splt
->output_section
->owner
== output_bfd
)
12627 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
12629 if (htab
->vxworks_p
&& !info
->shared
&& htab
->splt
->size
> 0)
12631 /* Correct the .rel(a).plt.unloaded relocations. They will have
12632 incorrect symbol indexes. */
12636 num_plts
= ((htab
->splt
->size
- htab
->plt_header_size
)
12637 / htab
->plt_entry_size
);
12638 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
12640 for (; num_plts
; num_plts
--)
12642 Elf_Internal_Rela rel
;
12644 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
12645 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
12646 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
12647 p
+= RELOC_SIZE (htab
);
12649 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
12650 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
12651 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
12652 p
+= RELOC_SIZE (htab
);
12657 /* Fill in the first three entries in the global offset table. */
12660 if (sgot
->size
> 0)
12663 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
12665 bfd_put_32 (output_bfd
,
12666 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
12668 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
12669 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
12672 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
12679 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
12681 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
12682 struct elf32_arm_link_hash_table
*globals
;
12684 i_ehdrp
= elf_elfheader (abfd
);
12686 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
12687 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
12689 i_ehdrp
->e_ident
[EI_OSABI
] = 0;
12690 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
12694 globals
= elf32_arm_hash_table (link_info
);
12695 if (globals
!= NULL
&& globals
->byteswap_code
)
12696 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
12700 static enum elf_reloc_type_class
12701 elf32_arm_reloc_type_class (const Elf_Internal_Rela
*rela
)
12703 switch ((int) ELF32_R_TYPE (rela
->r_info
))
12705 case R_ARM_RELATIVE
:
12706 return reloc_class_relative
;
12707 case R_ARM_JUMP_SLOT
:
12708 return reloc_class_plt
;
12710 return reloc_class_copy
;
12712 return reloc_class_normal
;
12716 /* Set the right machine number for an Arm ELF file. */
12719 elf32_arm_section_flags (flagword
*flags
, const Elf_Internal_Shdr
*hdr
)
12721 if (hdr
->sh_type
== SHT_NOTE
)
12722 *flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_SAME_CONTENTS
;
12728 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
12730 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
12733 /* Return TRUE if this is an unwinding table entry. */
12736 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
12738 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
12739 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
12743 /* Set the type and flags for an ARM section. We do this by
12744 the section name, which is a hack, but ought to work. */
12747 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
12751 name
= bfd_get_section_name (abfd
, sec
);
12753 if (is_arm_elf_unwind_section_name (abfd
, name
))
12755 hdr
->sh_type
= SHT_ARM_EXIDX
;
12756 hdr
->sh_flags
|= SHF_LINK_ORDER
;
12761 /* Handle an ARM specific section when reading an object file. This is
12762 called when bfd_section_from_shdr finds a section with an unknown
12766 elf32_arm_section_from_shdr (bfd
*abfd
,
12767 Elf_Internal_Shdr
* hdr
,
12771 /* There ought to be a place to keep ELF backend specific flags, but
12772 at the moment there isn't one. We just keep track of the
12773 sections by their name, instead. Fortunately, the ABI gives
12774 names for all the ARM specific sections, so we will probably get
12776 switch (hdr
->sh_type
)
12778 case SHT_ARM_EXIDX
:
12779 case SHT_ARM_PREEMPTMAP
:
12780 case SHT_ARM_ATTRIBUTES
:
12787 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
12793 static _arm_elf_section_data
*
12794 get_arm_elf_section_data (asection
* sec
)
12796 if (sec
&& sec
->owner
&& is_arm_elf (sec
->owner
))
12797 return elf32_arm_section_data (sec
);
12805 struct bfd_link_info
*info
;
12808 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
12809 asection
*, struct elf_link_hash_entry
*);
12810 } output_arch_syminfo
;
12812 enum map_symbol_type
12820 /* Output a single mapping symbol. */
12823 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
12824 enum map_symbol_type type
,
12827 static const char *names
[3] = {"$a", "$t", "$d"};
12828 Elf_Internal_Sym sym
;
12830 sym
.st_value
= osi
->sec
->output_section
->vma
12831 + osi
->sec
->output_offset
12835 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
12836 sym
.st_shndx
= osi
->sec_shndx
;
12837 elf32_arm_section_map_add (osi
->sec
, names
[type
][1], offset
);
12838 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
12842 /* Output mapping symbols for PLT entries associated with H. */
12845 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
12847 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
12848 struct elf32_arm_link_hash_table
*htab
;
12849 struct elf32_arm_link_hash_entry
*eh
;
12852 if (h
->root
.type
== bfd_link_hash_indirect
)
12855 if (h
->root
.type
== bfd_link_hash_warning
)
12856 /* When warning symbols are created, they **replace** the "real"
12857 entry in the hash table, thus we never get to see the real
12858 symbol in a hash traversal. So look at it now. */
12859 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12861 if (h
->plt
.offset
== (bfd_vma
) -1)
12864 htab
= elf32_arm_hash_table (osi
->info
);
12868 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12869 addr
= h
->plt
.offset
;
12870 if (htab
->symbian_p
)
12872 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12874 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
12877 else if (htab
->vxworks_p
)
12879 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12881 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
12883 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
12885 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
12890 bfd_signed_vma thumb_refs
;
12892 thumb_refs
= eh
->plt_thumb_refcount
;
12893 if (!htab
->use_blx
)
12894 thumb_refs
+= eh
->plt_maybe_thumb_refcount
;
12896 if (thumb_refs
> 0)
12898 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
12901 #ifdef FOUR_WORD_PLT
12902 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12904 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
12907 /* A three-word PLT with no Thumb thunk contains only Arm code,
12908 so only need to output a mapping symbol for the first PLT entry and
12909 entries with thumb thunks. */
12910 if (thumb_refs
> 0 || addr
== 20)
12912 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
12921 /* Output a single local symbol for a generated stub. */
12924 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
12925 bfd_vma offset
, bfd_vma size
)
12927 Elf_Internal_Sym sym
;
12929 sym
.st_value
= osi
->sec
->output_section
->vma
12930 + osi
->sec
->output_offset
12932 sym
.st_size
= size
;
12934 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
12935 sym
.st_shndx
= osi
->sec_shndx
;
12936 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
12940 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
12943 struct elf32_arm_stub_hash_entry
*stub_entry
;
12944 struct bfd_link_info
*info
;
12945 asection
*stub_sec
;
12948 output_arch_syminfo
*osi
;
12949 const insn_sequence
*template_sequence
;
12950 enum stub_insn_type prev_type
;
12953 enum map_symbol_type sym_type
;
12955 /* Massage our args to the form they really have. */
12956 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
12957 osi
= (output_arch_syminfo
*) in_arg
;
12961 stub_sec
= stub_entry
->stub_sec
;
12963 /* Ensure this stub is attached to the current section being
12965 if (stub_sec
!= osi
->sec
)
12968 addr
= (bfd_vma
) stub_entry
->stub_offset
;
12969 stub_name
= stub_entry
->output_name
;
12971 template_sequence
= stub_entry
->stub_template
;
12972 switch (template_sequence
[0].type
)
12975 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
, stub_entry
->stub_size
))
12980 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
12981 stub_entry
->stub_size
))
12989 prev_type
= DATA_TYPE
;
12991 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
12993 switch (template_sequence
[i
].type
)
12996 sym_type
= ARM_MAP_ARM
;
13001 sym_type
= ARM_MAP_THUMB
;
13005 sym_type
= ARM_MAP_DATA
;
13013 if (template_sequence
[i
].type
!= prev_type
)
13015 prev_type
= template_sequence
[i
].type
;
13016 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
13020 switch (template_sequence
[i
].type
)
13044 /* Output mapping symbols for linker generated sections,
13045 and for those data-only sections that do not have a
13049 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
13050 struct bfd_link_info
*info
,
13052 int (*func
) (void *, const char *,
13053 Elf_Internal_Sym
*,
13055 struct elf_link_hash_entry
*))
13057 output_arch_syminfo osi
;
13058 struct elf32_arm_link_hash_table
*htab
;
13060 bfd_size_type size
;
13063 htab
= elf32_arm_hash_table (info
);
13067 check_use_blx (htab
);
13073 /* Add a $d mapping symbol to data-only sections that
13074 don't have any mapping symbol. This may result in (harmless) redundant
13075 mapping symbols. */
13076 for (input_bfd
= info
->input_bfds
;
13078 input_bfd
= input_bfd
->link_next
)
13080 if ((input_bfd
->flags
& (BFD_LINKER_CREATED
| HAS_SYMS
)) == HAS_SYMS
)
13081 for (osi
.sec
= input_bfd
->sections
;
13083 osi
.sec
= osi
.sec
->next
)
13085 if (osi
.sec
->output_section
!= NULL
13086 && ((osi
.sec
->output_section
->flags
& (SEC_ALLOC
| SEC_CODE
))
13088 && (osi
.sec
->flags
& (SEC_HAS_CONTENTS
| SEC_LINKER_CREATED
))
13089 == SEC_HAS_CONTENTS
13090 && get_arm_elf_section_data (osi
.sec
) != NULL
13091 && get_arm_elf_section_data (osi
.sec
)->mapcount
== 0
13092 && osi
.sec
->size
> 0)
13094 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13095 (output_bfd
, osi
.sec
->output_section
);
13096 if (osi
.sec_shndx
!= (int)SHN_BAD
)
13097 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 0);
13102 /* ARM->Thumb glue. */
13103 if (htab
->arm_glue_size
> 0)
13105 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
13106 ARM2THUMB_GLUE_SECTION_NAME
);
13108 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13109 (output_bfd
, osi
.sec
->output_section
);
13110 if (info
->shared
|| htab
->root
.is_relocatable_executable
13111 || htab
->pic_veneer
)
13112 size
= ARM2THUMB_PIC_GLUE_SIZE
;
13113 else if (htab
->use_blx
)
13114 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
13116 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
13118 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
13120 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
13121 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
13125 /* Thumb->ARM glue. */
13126 if (htab
->thumb_glue_size
> 0)
13128 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
13129 THUMB2ARM_GLUE_SECTION_NAME
);
13131 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13132 (output_bfd
, osi
.sec
->output_section
);
13133 size
= THUMB2ARM_GLUE_SIZE
;
13135 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
13137 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
13138 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
13142 /* ARMv4 BX veneers. */
13143 if (htab
->bx_glue_size
> 0)
13145 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
13146 ARM_BX_GLUE_SECTION_NAME
);
13148 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13149 (output_bfd
, osi
.sec
->output_section
);
13151 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
13154 /* Long calls stubs. */
13155 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
13157 asection
* stub_sec
;
13159 for (stub_sec
= htab
->stub_bfd
->sections
;
13161 stub_sec
= stub_sec
->next
)
13163 /* Ignore non-stub sections. */
13164 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
13167 osi
.sec
= stub_sec
;
13169 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
13170 (output_bfd
, osi
.sec
->output_section
);
13172 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
13176 /* Finally, output mapping symbols for the PLT. */
13177 if (!htab
->splt
|| htab
->splt
->size
== 0)
13180 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
13181 htab
->splt
->output_section
);
13182 osi
.sec
= htab
->splt
;
13183 /* Output mapping symbols for the plt header. SymbianOS does not have a
13185 if (htab
->vxworks_p
)
13187 /* VxWorks shared libraries have no PLT header. */
13190 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
13192 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
13196 else if (!htab
->symbian_p
)
13198 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
13200 #ifndef FOUR_WORD_PLT
13201 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
13206 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, (void *) &osi
);
13210 /* Allocate target specific section data. */
13213 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
13215 if (!sec
->used_by_bfd
)
13217 _arm_elf_section_data
*sdata
;
13218 bfd_size_type amt
= sizeof (*sdata
);
13220 sdata
= (_arm_elf_section_data
*) bfd_zalloc (abfd
, amt
);
13223 sec
->used_by_bfd
= sdata
;
13226 return _bfd_elf_new_section_hook (abfd
, sec
);
13230 /* Used to order a list of mapping symbols by address. */
13233 elf32_arm_compare_mapping (const void * a
, const void * b
)
13235 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
13236 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
13238 if (amap
->vma
> bmap
->vma
)
13240 else if (amap
->vma
< bmap
->vma
)
13242 else if (amap
->type
> bmap
->type
)
13243 /* Ensure results do not depend on the host qsort for objects with
13244 multiple mapping symbols at the same address by sorting on type
13247 else if (amap
->type
< bmap
->type
)
13253 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
13255 static unsigned long
13256 offset_prel31 (unsigned long addr
, bfd_vma offset
)
13258 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
13261 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
13265 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
13267 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
13268 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
13270 /* High bit of first word is supposed to be zero. */
13271 if ((first_word
& 0x80000000ul
) == 0)
13272 first_word
= offset_prel31 (first_word
, offset
);
13274 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
13275 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
13276 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
13277 second_word
= offset_prel31 (second_word
, offset
);
13279 bfd_put_32 (output_bfd
, first_word
, to
);
13280 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
13283 /* Data for make_branch_to_a8_stub(). */
13285 struct a8_branch_to_stub_data
{
13286 asection
*writing_section
;
13287 bfd_byte
*contents
;
13291 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
13292 places for a particular section. */
13295 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
13298 struct elf32_arm_stub_hash_entry
*stub_entry
;
13299 struct a8_branch_to_stub_data
*data
;
13300 bfd_byte
*contents
;
13301 unsigned long branch_insn
;
13302 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
13303 bfd_signed_vma branch_offset
;
13305 unsigned int target
;
13307 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
13308 data
= (struct a8_branch_to_stub_data
*) in_arg
;
13310 if (stub_entry
->target_section
!= data
->writing_section
13311 || stub_entry
->stub_type
< arm_stub_a8_veneer_b_cond
)
13314 contents
= data
->contents
;
13316 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
13317 + stub_entry
->target_section
->output_offset
13318 + stub_entry
->target_value
;
13320 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
13321 + stub_entry
->stub_sec
->output_offset
13322 + stub_entry
->stub_offset
;
13324 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
13325 veneered_insn_loc
&= ~3u;
13327 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
13329 abfd
= stub_entry
->target_section
->owner
;
13330 target
= stub_entry
->target_value
;
13332 /* We attempt to avoid this condition by setting stubs_always_after_branch
13333 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
13334 This check is just to be on the safe side... */
13335 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
13337 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub is "
13338 "allocated in unsafe location"), abfd
);
13342 switch (stub_entry
->stub_type
)
13344 case arm_stub_a8_veneer_b
:
13345 case arm_stub_a8_veneer_b_cond
:
13346 branch_insn
= 0xf0009000;
13349 case arm_stub_a8_veneer_blx
:
13350 branch_insn
= 0xf000e800;
13353 case arm_stub_a8_veneer_bl
:
13355 unsigned int i1
, j1
, i2
, j2
, s
;
13357 branch_insn
= 0xf000d000;
13360 if (branch_offset
< -16777216 || branch_offset
> 16777214)
13362 /* There's not much we can do apart from complain if this
13364 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub out "
13365 "of range (input file too large)"), abfd
);
13369 /* i1 = not(j1 eor s), so:
13371 j1 = (not i1) eor s. */
13373 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
13374 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
13375 i2
= (branch_offset
>> 22) & 1;
13376 i1
= (branch_offset
>> 23) & 1;
13377 s
= (branch_offset
>> 24) & 1;
13380 branch_insn
|= j2
<< 11;
13381 branch_insn
|= j1
<< 13;
13382 branch_insn
|= s
<< 26;
13391 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[target
]);
13392 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[target
+ 2]);
13397 /* Do code byteswapping. Return FALSE afterwards so that the section is
13398 written out as normal. */
13401 elf32_arm_write_section (bfd
*output_bfd
,
13402 struct bfd_link_info
*link_info
,
13404 bfd_byte
*contents
)
13406 unsigned int mapcount
, errcount
;
13407 _arm_elf_section_data
*arm_data
;
13408 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
13409 elf32_arm_section_map
*map
;
13410 elf32_vfp11_erratum_list
*errnode
;
13413 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
13417 if (globals
== NULL
)
13420 /* If this section has not been allocated an _arm_elf_section_data
13421 structure then we cannot record anything. */
13422 arm_data
= get_arm_elf_section_data (sec
);
13423 if (arm_data
== NULL
)
13426 mapcount
= arm_data
->mapcount
;
13427 map
= arm_data
->map
;
13428 errcount
= arm_data
->erratumcount
;
13432 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
13434 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
13435 errnode
= errnode
->next
)
13437 bfd_vma target
= errnode
->vma
- offset
;
13439 switch (errnode
->type
)
13441 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
13443 bfd_vma branch_to_veneer
;
13444 /* Original condition code of instruction, plus bit mask for
13445 ARM B instruction. */
13446 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
13449 /* The instruction is before the label. */
13452 /* Above offset included in -4 below. */
13453 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
13454 - errnode
->vma
- 4;
13456 if ((signed) branch_to_veneer
< -(1 << 25)
13457 || (signed) branch_to_veneer
>= (1 << 25))
13458 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
13459 "range"), output_bfd
);
13461 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
13462 contents
[endianflip
^ target
] = insn
& 0xff;
13463 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
13464 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
13465 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
13469 case VFP11_ERRATUM_ARM_VENEER
:
13471 bfd_vma branch_from_veneer
;
13474 /* Take size of veneer into account. */
13475 branch_from_veneer
= errnode
->u
.v
.branch
->vma
13476 - errnode
->vma
- 12;
13478 if ((signed) branch_from_veneer
< -(1 << 25)
13479 || (signed) branch_from_veneer
>= (1 << 25))
13480 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
13481 "range"), output_bfd
);
13483 /* Original instruction. */
13484 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
13485 contents
[endianflip
^ target
] = insn
& 0xff;
13486 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
13487 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
13488 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
13490 /* Branch back to insn after original insn. */
13491 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
13492 contents
[endianflip
^ (target
+ 4)] = insn
& 0xff;
13493 contents
[endianflip
^ (target
+ 5)] = (insn
>> 8) & 0xff;
13494 contents
[endianflip
^ (target
+ 6)] = (insn
>> 16) & 0xff;
13495 contents
[endianflip
^ (target
+ 7)] = (insn
>> 24) & 0xff;
13505 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
13507 arm_unwind_table_edit
*edit_node
13508 = arm_data
->u
.exidx
.unwind_edit_list
;
13509 /* Now, sec->size is the size of the section we will write. The original
13510 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
13511 markers) was sec->rawsize. (This isn't the case if we perform no
13512 edits, then rawsize will be zero and we should use size). */
13513 bfd_byte
*edited_contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
13514 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
13515 unsigned int in_index
, out_index
;
13516 bfd_vma add_to_offsets
= 0;
13518 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
13522 unsigned int edit_index
= edit_node
->index
;
13524 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
13526 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
13527 contents
+ in_index
* 8, add_to_offsets
);
13531 else if (in_index
== edit_index
13532 || (in_index
* 8 >= input_size
13533 && edit_index
== UINT_MAX
))
13535 switch (edit_node
->type
)
13537 case DELETE_EXIDX_ENTRY
:
13539 add_to_offsets
+= 8;
13542 case INSERT_EXIDX_CANTUNWIND_AT_END
:
13544 asection
*text_sec
= edit_node
->linked_section
;
13545 bfd_vma text_offset
= text_sec
->output_section
->vma
13546 + text_sec
->output_offset
13548 bfd_vma exidx_offset
= offset
+ out_index
* 8;
13549 unsigned long prel31_offset
;
13551 /* Note: this is meant to be equivalent to an
13552 R_ARM_PREL31 relocation. These synthetic
13553 EXIDX_CANTUNWIND markers are not relocated by the
13554 usual BFD method. */
13555 prel31_offset
= (text_offset
- exidx_offset
)
13558 /* First address we can't unwind. */
13559 bfd_put_32 (output_bfd
, prel31_offset
,
13560 &edited_contents
[out_index
* 8]);
13562 /* Code for EXIDX_CANTUNWIND. */
13563 bfd_put_32 (output_bfd
, 0x1,
13564 &edited_contents
[out_index
* 8 + 4]);
13567 add_to_offsets
-= 8;
13572 edit_node
= edit_node
->next
;
13577 /* No more edits, copy remaining entries verbatim. */
13578 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
13579 contents
+ in_index
* 8, add_to_offsets
);
13585 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
13586 bfd_set_section_contents (output_bfd
, sec
->output_section
,
13588 (file_ptr
) sec
->output_offset
, sec
->size
);
13593 /* Fix code to point to Cortex-A8 erratum stubs. */
13594 if (globals
->fix_cortex_a8
)
13596 struct a8_branch_to_stub_data data
;
13598 data
.writing_section
= sec
;
13599 data
.contents
= contents
;
13601 bfd_hash_traverse (&globals
->stub_hash_table
, make_branch_to_a8_stub
,
13608 if (globals
->byteswap_code
)
13610 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
13613 for (i
= 0; i
< mapcount
; i
++)
13615 if (i
== mapcount
- 1)
13618 end
= map
[i
+ 1].vma
;
13620 switch (map
[i
].type
)
13623 /* Byte swap code words. */
13624 while (ptr
+ 3 < end
)
13626 tmp
= contents
[ptr
];
13627 contents
[ptr
] = contents
[ptr
+ 3];
13628 contents
[ptr
+ 3] = tmp
;
13629 tmp
= contents
[ptr
+ 1];
13630 contents
[ptr
+ 1] = contents
[ptr
+ 2];
13631 contents
[ptr
+ 2] = tmp
;
13637 /* Byte swap code halfwords. */
13638 while (ptr
+ 1 < end
)
13640 tmp
= contents
[ptr
];
13641 contents
[ptr
] = contents
[ptr
+ 1];
13642 contents
[ptr
+ 1] = tmp
;
13648 /* Leave data alone. */
13656 arm_data
->mapcount
= -1;
13657 arm_data
->mapsize
= 0;
13658 arm_data
->map
= NULL
;
13663 /* Display STT_ARM_TFUNC symbols as functions. */
13666 elf32_arm_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
13669 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
13671 if (ELF_ST_TYPE (elfsym
->internal_elf_sym
.st_info
) == STT_ARM_TFUNC
)
13672 elfsym
->symbol
.flags
|= BSF_FUNCTION
;
13676 /* Mangle thumb function symbols as we read them in. */
13679 elf32_arm_swap_symbol_in (bfd
* abfd
,
13682 Elf_Internal_Sym
*dst
)
13684 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
13687 /* New EABI objects mark thumb function symbols by setting the low bit of
13688 the address. Turn these into STT_ARM_TFUNC. */
13689 if ((ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
)
13690 && (dst
->st_value
& 1))
13692 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_ARM_TFUNC
);
13693 dst
->st_value
&= ~(bfd_vma
) 1;
13699 /* Mangle thumb function symbols as we write them out. */
13702 elf32_arm_swap_symbol_out (bfd
*abfd
,
13703 const Elf_Internal_Sym
*src
,
13707 Elf_Internal_Sym newsym
;
13709 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
13710 of the address set, as per the new EABI. We do this unconditionally
13711 because objcopy does not set the elf header flags until after
13712 it writes out the symbol table. */
13713 if (ELF_ST_TYPE (src
->st_info
) == STT_ARM_TFUNC
)
13716 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
13717 if (newsym
.st_shndx
!= SHN_UNDEF
)
13719 /* Do this only for defined symbols. At link type, the static
13720 linker will simulate the work of dynamic linker of resolving
13721 symbols and will carry over the thumbness of found symbols to
13722 the output symbol table. It's not clear how it happens, but
13723 the thumbness of undefined symbols can well be different at
13724 runtime, and writing '1' for them will be confusing for users
13725 and possibly for dynamic linker itself.
13727 newsym
.st_value
|= 1;
13732 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
13735 /* Add the PT_ARM_EXIDX program header. */
13738 elf32_arm_modify_segment_map (bfd
*abfd
,
13739 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
13741 struct elf_segment_map
*m
;
13744 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
13745 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
13747 /* If there is already a PT_ARM_EXIDX header, then we do not
13748 want to add another one. This situation arises when running
13749 "strip"; the input binary already has the header. */
13750 m
= elf_tdata (abfd
)->segment_map
;
13751 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
13755 m
= (struct elf_segment_map
*)
13756 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
13759 m
->p_type
= PT_ARM_EXIDX
;
13761 m
->sections
[0] = sec
;
13763 m
->next
= elf_tdata (abfd
)->segment_map
;
13764 elf_tdata (abfd
)->segment_map
= m
;
13771 /* We may add a PT_ARM_EXIDX program header. */
13774 elf32_arm_additional_program_headers (bfd
*abfd
,
13775 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
13779 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
13780 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
13786 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
13789 elf32_arm_is_function_type (unsigned int type
)
13791 return (type
== STT_FUNC
) || (type
== STT_ARM_TFUNC
);
13794 /* We use this to override swap_symbol_in and swap_symbol_out. */
13795 const struct elf_size_info elf32_arm_size_info
=
13797 sizeof (Elf32_External_Ehdr
),
13798 sizeof (Elf32_External_Phdr
),
13799 sizeof (Elf32_External_Shdr
),
13800 sizeof (Elf32_External_Rel
),
13801 sizeof (Elf32_External_Rela
),
13802 sizeof (Elf32_External_Sym
),
13803 sizeof (Elf32_External_Dyn
),
13804 sizeof (Elf_External_Note
),
13808 ELFCLASS32
, EV_CURRENT
,
13809 bfd_elf32_write_out_phdrs
,
13810 bfd_elf32_write_shdrs_and_ehdr
,
13811 bfd_elf32_checksum_contents
,
13812 bfd_elf32_write_relocs
,
13813 elf32_arm_swap_symbol_in
,
13814 elf32_arm_swap_symbol_out
,
13815 bfd_elf32_slurp_reloc_table
,
13816 bfd_elf32_slurp_symbol_table
,
13817 bfd_elf32_swap_dyn_in
,
13818 bfd_elf32_swap_dyn_out
,
13819 bfd_elf32_swap_reloc_in
,
13820 bfd_elf32_swap_reloc_out
,
13821 bfd_elf32_swap_reloca_in
,
13822 bfd_elf32_swap_reloca_out
13825 #define ELF_ARCH bfd_arch_arm
13826 #define ELF_MACHINE_CODE EM_ARM
13827 #ifdef __QNXTARGET__
13828 #define ELF_MAXPAGESIZE 0x1000
13830 #define ELF_MAXPAGESIZE 0x8000
13832 #define ELF_MINPAGESIZE 0x1000
13833 #define ELF_COMMONPAGESIZE 0x1000
13835 #define bfd_elf32_mkobject elf32_arm_mkobject
13837 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
13838 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
13839 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
13840 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
13841 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
13842 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
13843 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
13844 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
13845 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
13846 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
13847 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
13848 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
13849 #define bfd_elf32_bfd_final_link elf32_arm_final_link
13851 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
13852 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
13853 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
13854 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
13855 #define elf_backend_check_relocs elf32_arm_check_relocs
13856 #define elf_backend_relocate_section elf32_arm_relocate_section
13857 #define elf_backend_write_section elf32_arm_write_section
13858 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
13859 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
13860 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
13861 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
13862 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
13863 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
13864 #define elf_backend_post_process_headers elf32_arm_post_process_headers
13865 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
13866 #define elf_backend_object_p elf32_arm_object_p
13867 #define elf_backend_section_flags elf32_arm_section_flags
13868 #define elf_backend_fake_sections elf32_arm_fake_sections
13869 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
13870 #define elf_backend_final_write_processing elf32_arm_final_write_processing
13871 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
13872 #define elf_backend_symbol_processing elf32_arm_symbol_processing
13873 #define elf_backend_size_info elf32_arm_size_info
13874 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
13875 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
13876 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
13877 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
13878 #define elf_backend_is_function_type elf32_arm_is_function_type
13880 #define elf_backend_can_refcount 1
13881 #define elf_backend_can_gc_sections 1
13882 #define elf_backend_plt_readonly 1
13883 #define elf_backend_want_got_plt 1
13884 #define elf_backend_want_plt_sym 0
13885 #define elf_backend_may_use_rel_p 1
13886 #define elf_backend_may_use_rela_p 0
13887 #define elf_backend_default_use_rela_p 0
13889 #define elf_backend_got_header_size 12
13891 #undef elf_backend_obj_attrs_vendor
13892 #define elf_backend_obj_attrs_vendor "aeabi"
13893 #undef elf_backend_obj_attrs_section
13894 #define elf_backend_obj_attrs_section ".ARM.attributes"
13895 #undef elf_backend_obj_attrs_arg_type
13896 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
13897 #undef elf_backend_obj_attrs_section_type
13898 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
13899 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
13901 #include "elf32-target.h"
13903 /* VxWorks Targets. */
13905 #undef TARGET_LITTLE_SYM
13906 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
13907 #undef TARGET_LITTLE_NAME
13908 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
13909 #undef TARGET_BIG_SYM
13910 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
13911 #undef TARGET_BIG_NAME
13912 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
13914 /* Like elf32_arm_link_hash_table_create -- but overrides
13915 appropriately for VxWorks. */
13917 static struct bfd_link_hash_table
*
13918 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
13920 struct bfd_link_hash_table
*ret
;
13922 ret
= elf32_arm_link_hash_table_create (abfd
);
13925 struct elf32_arm_link_hash_table
*htab
13926 = (struct elf32_arm_link_hash_table
*) ret
;
13928 htab
->vxworks_p
= 1;
13934 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
13936 elf32_arm_final_write_processing (abfd
, linker
);
13937 elf_vxworks_final_write_processing (abfd
, linker
);
13941 #define elf32_bed elf32_arm_vxworks_bed
13943 #undef bfd_elf32_bfd_link_hash_table_create
13944 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
13945 #undef elf_backend_add_symbol_hook
13946 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
13947 #undef elf_backend_final_write_processing
13948 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
13949 #undef elf_backend_emit_relocs
13950 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
13952 #undef elf_backend_may_use_rel_p
13953 #define elf_backend_may_use_rel_p 0
13954 #undef elf_backend_may_use_rela_p
13955 #define elf_backend_may_use_rela_p 1
13956 #undef elf_backend_default_use_rela_p
13957 #define elf_backend_default_use_rela_p 1
13958 #undef elf_backend_want_plt_sym
13959 #define elf_backend_want_plt_sym 1
13960 #undef ELF_MAXPAGESIZE
13961 #define ELF_MAXPAGESIZE 0x1000
13963 #include "elf32-target.h"
13966 /* Merge backend specific data from an object file to the output
13967 object file when linking. */
13970 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
13972 flagword out_flags
;
13974 bfd_boolean flags_compatible
= TRUE
;
13977 /* Check if we have the same endianess. */
13978 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
13981 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
13984 if (!elf32_arm_merge_eabi_attributes (ibfd
, obfd
))
13987 /* The input BFD must have had its flags initialised. */
13988 /* The following seems bogus to me -- The flags are initialized in
13989 the assembler but I don't think an elf_flags_init field is
13990 written into the object. */
13991 /* BFD_ASSERT (elf_flags_init (ibfd)); */
13993 in_flags
= elf_elfheader (ibfd
)->e_flags
;
13994 out_flags
= elf_elfheader (obfd
)->e_flags
;
13996 /* In theory there is no reason why we couldn't handle this. However
13997 in practice it isn't even close to working and there is no real
13998 reason to want it. */
13999 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
14000 && !(ibfd
->flags
& DYNAMIC
)
14001 && (in_flags
& EF_ARM_BE8
))
14003 _bfd_error_handler (_("error: %B is already in final BE8 format"),
14008 if (!elf_flags_init (obfd
))
14010 /* If the input is the default architecture and had the default
14011 flags then do not bother setting the flags for the output
14012 architecture, instead allow future merges to do this. If no
14013 future merges ever set these flags then they will retain their
14014 uninitialised values, which surprise surprise, correspond
14015 to the default values. */
14016 if (bfd_get_arch_info (ibfd
)->the_default
14017 && elf_elfheader (ibfd
)->e_flags
== 0)
14020 elf_flags_init (obfd
) = TRUE
;
14021 elf_elfheader (obfd
)->e_flags
= in_flags
;
14023 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
14024 && bfd_get_arch_info (obfd
)->the_default
)
14025 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
14030 /* Determine what should happen if the input ARM architecture
14031 does not match the output ARM architecture. */
14032 if (! bfd_arm_merge_machines (ibfd
, obfd
))
14035 /* Identical flags must be compatible. */
14036 if (in_flags
== out_flags
)
14039 /* Check to see if the input BFD actually contains any sections. If
14040 not, its flags may not have been initialised either, but it
14041 cannot actually cause any incompatiblity. Do not short-circuit
14042 dynamic objects; their section list may be emptied by
14043 elf_link_add_object_symbols.
14045 Also check to see if there are no code sections in the input.
14046 In this case there is no need to check for code specific flags.
14047 XXX - do we need to worry about floating-point format compatability
14048 in data sections ? */
14049 if (!(ibfd
->flags
& DYNAMIC
))
14051 bfd_boolean null_input_bfd
= TRUE
;
14052 bfd_boolean only_data_sections
= TRUE
;
14054 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
14056 /* Ignore synthetic glue sections. */
14057 if (strcmp (sec
->name
, ".glue_7")
14058 && strcmp (sec
->name
, ".glue_7t"))
14060 if ((bfd_get_section_flags (ibfd
, sec
)
14061 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
14062 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
14063 only_data_sections
= FALSE
;
14065 null_input_bfd
= FALSE
;
14070 if (null_input_bfd
|| only_data_sections
)
14074 /* Complain about various flag mismatches. */
14075 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
14076 EF_ARM_EABI_VERSION (out_flags
)))
14079 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
14081 (in_flags
& EF_ARM_EABIMASK
) >> 24,
14082 (out_flags
& EF_ARM_EABIMASK
) >> 24);
14086 /* Not sure what needs to be checked for EABI versions >= 1. */
14087 /* VxWorks libraries do not use these flags. */
14088 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
14089 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
14090 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
14092 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
14095 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
14097 in_flags
& EF_ARM_APCS_26
? 26 : 32,
14098 out_flags
& EF_ARM_APCS_26
? 26 : 32);
14099 flags_compatible
= FALSE
;
14102 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
14104 if (in_flags
& EF_ARM_APCS_FLOAT
)
14106 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
14110 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
14113 flags_compatible
= FALSE
;
14116 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
14118 if (in_flags
& EF_ARM_VFP_FLOAT
)
14120 (_("error: %B uses VFP instructions, whereas %B does not"),
14124 (_("error: %B uses FPA instructions, whereas %B does not"),
14127 flags_compatible
= FALSE
;
14130 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
14132 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
14134 (_("error: %B uses Maverick instructions, whereas %B does not"),
14138 (_("error: %B does not use Maverick instructions, whereas %B does"),
14141 flags_compatible
= FALSE
;
14144 #ifdef EF_ARM_SOFT_FLOAT
14145 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
14147 /* We can allow interworking between code that is VFP format
14148 layout, and uses either soft float or integer regs for
14149 passing floating point arguments and results. We already
14150 know that the APCS_FLOAT flags match; similarly for VFP
14152 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
14153 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
14155 if (in_flags
& EF_ARM_SOFT_FLOAT
)
14157 (_("error: %B uses software FP, whereas %B uses hardware FP"),
14161 (_("error: %B uses hardware FP, whereas %B uses software FP"),
14164 flags_compatible
= FALSE
;
14169 /* Interworking mismatch is only a warning. */
14170 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
14172 if (in_flags
& EF_ARM_INTERWORK
)
14175 (_("Warning: %B supports interworking, whereas %B does not"),
14181 (_("Warning: %B does not support interworking, whereas %B does"),
14187 return flags_compatible
;
14191 /* Symbian OS Targets. */
14193 #undef TARGET_LITTLE_SYM
14194 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
14195 #undef TARGET_LITTLE_NAME
14196 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
14197 #undef TARGET_BIG_SYM
14198 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
14199 #undef TARGET_BIG_NAME
14200 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
14202 /* Like elf32_arm_link_hash_table_create -- but overrides
14203 appropriately for Symbian OS. */
14205 static struct bfd_link_hash_table
*
14206 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
14208 struct bfd_link_hash_table
*ret
;
14210 ret
= elf32_arm_link_hash_table_create (abfd
);
14213 struct elf32_arm_link_hash_table
*htab
14214 = (struct elf32_arm_link_hash_table
*)ret
;
14215 /* There is no PLT header for Symbian OS. */
14216 htab
->plt_header_size
= 0;
14217 /* The PLT entries are each one instruction and one word. */
14218 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
14219 htab
->symbian_p
= 1;
14220 /* Symbian uses armv5t or above, so use_blx is always true. */
14222 htab
->root
.is_relocatable_executable
= 1;
14227 static const struct bfd_elf_special_section
14228 elf32_arm_symbian_special_sections
[] =
14230 /* In a BPABI executable, the dynamic linking sections do not go in
14231 the loadable read-only segment. The post-linker may wish to
14232 refer to these sections, but they are not part of the final
14234 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
14235 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
14236 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
14237 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
14238 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
14239 /* These sections do not need to be writable as the SymbianOS
14240 postlinker will arrange things so that no dynamic relocation is
14242 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
14243 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
14244 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
14245 { NULL
, 0, 0, 0, 0 }
14249 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
14250 struct bfd_link_info
*link_info
)
14252 /* BPABI objects are never loaded directly by an OS kernel; they are
14253 processed by a postlinker first, into an OS-specific format. If
14254 the D_PAGED bit is set on the file, BFD will align segments on
14255 page boundaries, so that an OS can directly map the file. With
14256 BPABI objects, that just results in wasted space. In addition,
14257 because we clear the D_PAGED bit, map_sections_to_segments will
14258 recognize that the program headers should not be mapped into any
14259 loadable segment. */
14260 abfd
->flags
&= ~D_PAGED
;
14261 elf32_arm_begin_write_processing (abfd
, link_info
);
14265 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
14266 struct bfd_link_info
*info
)
14268 struct elf_segment_map
*m
;
14271 /* BPABI shared libraries and executables should have a PT_DYNAMIC
14272 segment. However, because the .dynamic section is not marked
14273 with SEC_LOAD, the generic ELF code will not create such a
14275 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
14278 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
14279 if (m
->p_type
== PT_DYNAMIC
)
14284 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
14285 m
->next
= elf_tdata (abfd
)->segment_map
;
14286 elf_tdata (abfd
)->segment_map
= m
;
14290 /* Also call the generic arm routine. */
14291 return elf32_arm_modify_segment_map (abfd
, info
);
14294 /* Return address for Ith PLT stub in section PLT, for relocation REL
14295 or (bfd_vma) -1 if it should not be included. */
14298 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
14299 const arelent
*rel ATTRIBUTE_UNUSED
)
14301 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
14306 #define elf32_bed elf32_arm_symbian_bed
14308 /* The dynamic sections are not allocated on SymbianOS; the postlinker
14309 will process them and then discard them. */
14310 #undef ELF_DYNAMIC_SEC_FLAGS
14311 #define ELF_DYNAMIC_SEC_FLAGS \
14312 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
14314 #undef elf_backend_add_symbol_hook
14315 #undef elf_backend_emit_relocs
14317 #undef bfd_elf32_bfd_link_hash_table_create
14318 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
14319 #undef elf_backend_special_sections
14320 #define elf_backend_special_sections elf32_arm_symbian_special_sections
14321 #undef elf_backend_begin_write_processing
14322 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
14323 #undef elf_backend_final_write_processing
14324 #define elf_backend_final_write_processing elf32_arm_final_write_processing
14326 #undef elf_backend_modify_segment_map
14327 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
14329 /* There is no .got section for BPABI objects, and hence no header. */
14330 #undef elf_backend_got_header_size
14331 #define elf_backend_got_header_size 0
14333 /* Similarly, there is no .got.plt section. */
14334 #undef elf_backend_want_got_plt
14335 #define elf_backend_want_got_plt 0
14337 #undef elf_backend_plt_sym_val
14338 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
14340 #undef elf_backend_may_use_rel_p
14341 #define elf_backend_may_use_rel_p 1
14342 #undef elf_backend_may_use_rela_p
14343 #define elf_backend_may_use_rela_p 0
14344 #undef elf_backend_default_use_rela_p
14345 #define elf_backend_default_use_rela_p 0
14346 #undef elf_backend_want_plt_sym
14347 #define elf_backend_want_plt_sym 0
14348 #undef ELF_MAXPAGESIZE
14349 #define ELF_MAXPAGESIZE 0x8000
14351 #include "elf32-target.h"