1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "libiberty.h"
29 #include "elf-vxworks.h"
32 /* Return the relocation section associated with NAME. HTAB is the
33 bfd's elf32_arm_link_hash_entry. */
34 #define RELOC_SECTION(HTAB, NAME) \
35 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37 /* Return size of a relocation entry. HTAB is the bfd's
38 elf32_arm_link_hash_entry. */
39 #define RELOC_SIZE(HTAB) \
41 ? sizeof (Elf32_External_Rel) \
42 : sizeof (Elf32_External_Rela))
44 /* Return function to swap relocations in. HTAB is the bfd's
45 elf32_arm_link_hash_entry. */
46 #define SWAP_RELOC_IN(HTAB) \
48 ? bfd_elf32_swap_reloc_in \
49 : bfd_elf32_swap_reloca_in)
51 /* Return function to swap relocations out. HTAB is the bfd's
52 elf32_arm_link_hash_entry. */
53 #define SWAP_RELOC_OUT(HTAB) \
55 ? bfd_elf32_swap_reloc_out \
56 : bfd_elf32_swap_reloca_out)
58 #define elf_info_to_howto 0
59 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61 #define ARM_ELF_ABI_VERSION 0
62 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64 static bfd_boolean
elf32_arm_write_section (bfd
*output_bfd
,
65 struct bfd_link_info
*link_info
,
69 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
70 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
73 static reloc_howto_type elf32_arm_howto_table_1
[] =
76 HOWTO (R_ARM_NONE
, /* type */
78 0, /* size (0 = byte, 1 = short, 2 = long) */
80 FALSE
, /* pc_relative */
82 complain_overflow_dont
,/* complain_on_overflow */
83 bfd_elf_generic_reloc
, /* special_function */
84 "R_ARM_NONE", /* name */
85 FALSE
, /* partial_inplace */
88 FALSE
), /* pcrel_offset */
90 HOWTO (R_ARM_PC24
, /* type */
92 2, /* size (0 = byte, 1 = short, 2 = long) */
94 TRUE
, /* pc_relative */
96 complain_overflow_signed
,/* complain_on_overflow */
97 bfd_elf_generic_reloc
, /* special_function */
98 "R_ARM_PC24", /* name */
99 FALSE
, /* partial_inplace */
100 0x00ffffff, /* src_mask */
101 0x00ffffff, /* dst_mask */
102 TRUE
), /* pcrel_offset */
104 /* 32 bit absolute */
105 HOWTO (R_ARM_ABS32
, /* type */
107 2, /* size (0 = byte, 1 = short, 2 = long) */
109 FALSE
, /* pc_relative */
111 complain_overflow_bitfield
,/* complain_on_overflow */
112 bfd_elf_generic_reloc
, /* special_function */
113 "R_ARM_ABS32", /* name */
114 FALSE
, /* partial_inplace */
115 0xffffffff, /* src_mask */
116 0xffffffff, /* dst_mask */
117 FALSE
), /* pcrel_offset */
119 /* standard 32bit pc-relative reloc */
120 HOWTO (R_ARM_REL32
, /* type */
122 2, /* size (0 = byte, 1 = short, 2 = long) */
124 TRUE
, /* pc_relative */
126 complain_overflow_bitfield
,/* complain_on_overflow */
127 bfd_elf_generic_reloc
, /* special_function */
128 "R_ARM_REL32", /* name */
129 FALSE
, /* partial_inplace */
130 0xffffffff, /* src_mask */
131 0xffffffff, /* dst_mask */
132 TRUE
), /* pcrel_offset */
134 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
135 HOWTO (R_ARM_LDR_PC_G0
, /* type */
137 0, /* size (0 = byte, 1 = short, 2 = long) */
139 TRUE
, /* pc_relative */
141 complain_overflow_dont
,/* complain_on_overflow */
142 bfd_elf_generic_reloc
, /* special_function */
143 "R_ARM_LDR_PC_G0", /* name */
144 FALSE
, /* partial_inplace */
145 0xffffffff, /* src_mask */
146 0xffffffff, /* dst_mask */
147 TRUE
), /* pcrel_offset */
149 /* 16 bit absolute */
150 HOWTO (R_ARM_ABS16
, /* type */
152 1, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE
, /* pc_relative */
156 complain_overflow_bitfield
,/* complain_on_overflow */
157 bfd_elf_generic_reloc
, /* special_function */
158 "R_ARM_ABS16", /* name */
159 FALSE
, /* partial_inplace */
160 0x0000ffff, /* src_mask */
161 0x0000ffff, /* dst_mask */
162 FALSE
), /* pcrel_offset */
164 /* 12 bit absolute */
165 HOWTO (R_ARM_ABS12
, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 FALSE
, /* pc_relative */
171 complain_overflow_bitfield
,/* complain_on_overflow */
172 bfd_elf_generic_reloc
, /* special_function */
173 "R_ARM_ABS12", /* name */
174 FALSE
, /* partial_inplace */
175 0x00000fff, /* src_mask */
176 0x00000fff, /* dst_mask */
177 FALSE
), /* pcrel_offset */
179 HOWTO (R_ARM_THM_ABS5
, /* type */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
183 FALSE
, /* pc_relative */
185 complain_overflow_bitfield
,/* complain_on_overflow */
186 bfd_elf_generic_reloc
, /* special_function */
187 "R_ARM_THM_ABS5", /* name */
188 FALSE
, /* partial_inplace */
189 0x000007e0, /* src_mask */
190 0x000007e0, /* dst_mask */
191 FALSE
), /* pcrel_offset */
194 HOWTO (R_ARM_ABS8
, /* type */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
198 FALSE
, /* pc_relative */
200 complain_overflow_bitfield
,/* complain_on_overflow */
201 bfd_elf_generic_reloc
, /* special_function */
202 "R_ARM_ABS8", /* name */
203 FALSE
, /* partial_inplace */
204 0x000000ff, /* src_mask */
205 0x000000ff, /* dst_mask */
206 FALSE
), /* pcrel_offset */
208 HOWTO (R_ARM_SBREL32
, /* type */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
212 FALSE
, /* pc_relative */
214 complain_overflow_dont
,/* complain_on_overflow */
215 bfd_elf_generic_reloc
, /* special_function */
216 "R_ARM_SBREL32", /* name */
217 FALSE
, /* partial_inplace */
218 0xffffffff, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE
), /* pcrel_offset */
222 HOWTO (R_ARM_THM_CALL
, /* type */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
226 TRUE
, /* pc_relative */
228 complain_overflow_signed
,/* complain_on_overflow */
229 bfd_elf_generic_reloc
, /* special_function */
230 "R_ARM_THM_CALL", /* name */
231 FALSE
, /* partial_inplace */
232 0x07ff2fff, /* src_mask */
233 0x07ff2fff, /* dst_mask */
234 TRUE
), /* pcrel_offset */
236 HOWTO (R_ARM_THM_PC8
, /* type */
238 1, /* size (0 = byte, 1 = short, 2 = long) */
240 TRUE
, /* pc_relative */
242 complain_overflow_signed
,/* complain_on_overflow */
243 bfd_elf_generic_reloc
, /* special_function */
244 "R_ARM_THM_PC8", /* name */
245 FALSE
, /* partial_inplace */
246 0x000000ff, /* src_mask */
247 0x000000ff, /* dst_mask */
248 TRUE
), /* pcrel_offset */
250 HOWTO (R_ARM_BREL_ADJ
, /* type */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
254 FALSE
, /* pc_relative */
256 complain_overflow_signed
,/* complain_on_overflow */
257 bfd_elf_generic_reloc
, /* special_function */
258 "R_ARM_BREL_ADJ", /* name */
259 FALSE
, /* partial_inplace */
260 0xffffffff, /* src_mask */
261 0xffffffff, /* dst_mask */
262 FALSE
), /* pcrel_offset */
264 HOWTO (R_ARM_TLS_DESC
, /* type */
266 2, /* size (0 = byte, 1 = short, 2 = long) */
268 FALSE
, /* pc_relative */
270 complain_overflow_bitfield
,/* complain_on_overflow */
271 bfd_elf_generic_reloc
, /* special_function */
272 "R_ARM_TLS_DESC", /* name */
273 FALSE
, /* partial_inplace */
274 0xffffffff, /* src_mask */
275 0xffffffff, /* dst_mask */
276 FALSE
), /* pcrel_offset */
278 HOWTO (R_ARM_THM_SWI8
, /* type */
280 0, /* size (0 = byte, 1 = short, 2 = long) */
282 FALSE
, /* pc_relative */
284 complain_overflow_signed
,/* complain_on_overflow */
285 bfd_elf_generic_reloc
, /* special_function */
286 "R_ARM_SWI8", /* name */
287 FALSE
, /* partial_inplace */
288 0x00000000, /* src_mask */
289 0x00000000, /* dst_mask */
290 FALSE
), /* pcrel_offset */
292 /* BLX instruction for the ARM. */
293 HOWTO (R_ARM_XPC25
, /* type */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
297 TRUE
, /* pc_relative */
299 complain_overflow_signed
,/* complain_on_overflow */
300 bfd_elf_generic_reloc
, /* special_function */
301 "R_ARM_XPC25", /* name */
302 FALSE
, /* partial_inplace */
303 0x00ffffff, /* src_mask */
304 0x00ffffff, /* dst_mask */
305 TRUE
), /* pcrel_offset */
307 /* BLX instruction for the Thumb. */
308 HOWTO (R_ARM_THM_XPC22
, /* type */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
312 TRUE
, /* pc_relative */
314 complain_overflow_signed
,/* complain_on_overflow */
315 bfd_elf_generic_reloc
, /* special_function */
316 "R_ARM_THM_XPC22", /* name */
317 FALSE
, /* partial_inplace */
318 0x07ff2fff, /* src_mask */
319 0x07ff2fff, /* dst_mask */
320 TRUE
), /* pcrel_offset */
322 /* Dynamic TLS relocations. */
324 HOWTO (R_ARM_TLS_DTPMOD32
, /* type */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
328 FALSE
, /* pc_relative */
330 complain_overflow_bitfield
,/* complain_on_overflow */
331 bfd_elf_generic_reloc
, /* special_function */
332 "R_ARM_TLS_DTPMOD32", /* name */
333 TRUE
, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 FALSE
), /* pcrel_offset */
338 HOWTO (R_ARM_TLS_DTPOFF32
, /* type */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE
, /* pc_relative */
344 complain_overflow_bitfield
,/* complain_on_overflow */
345 bfd_elf_generic_reloc
, /* special_function */
346 "R_ARM_TLS_DTPOFF32", /* name */
347 TRUE
, /* partial_inplace */
348 0xffffffff, /* src_mask */
349 0xffffffff, /* dst_mask */
350 FALSE
), /* pcrel_offset */
352 HOWTO (R_ARM_TLS_TPOFF32
, /* type */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
356 FALSE
, /* pc_relative */
358 complain_overflow_bitfield
,/* complain_on_overflow */
359 bfd_elf_generic_reloc
, /* special_function */
360 "R_ARM_TLS_TPOFF32", /* name */
361 TRUE
, /* partial_inplace */
362 0xffffffff, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE
), /* pcrel_offset */
366 /* Relocs used in ARM Linux */
368 HOWTO (R_ARM_COPY
, /* type */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
372 FALSE
, /* pc_relative */
374 complain_overflow_bitfield
,/* complain_on_overflow */
375 bfd_elf_generic_reloc
, /* special_function */
376 "R_ARM_COPY", /* name */
377 TRUE
, /* partial_inplace */
378 0xffffffff, /* src_mask */
379 0xffffffff, /* dst_mask */
380 FALSE
), /* pcrel_offset */
382 HOWTO (R_ARM_GLOB_DAT
, /* type */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
386 FALSE
, /* pc_relative */
388 complain_overflow_bitfield
,/* complain_on_overflow */
389 bfd_elf_generic_reloc
, /* special_function */
390 "R_ARM_GLOB_DAT", /* name */
391 TRUE
, /* partial_inplace */
392 0xffffffff, /* src_mask */
393 0xffffffff, /* dst_mask */
394 FALSE
), /* pcrel_offset */
396 HOWTO (R_ARM_JUMP_SLOT
, /* type */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
400 FALSE
, /* pc_relative */
402 complain_overflow_bitfield
,/* complain_on_overflow */
403 bfd_elf_generic_reloc
, /* special_function */
404 "R_ARM_JUMP_SLOT", /* name */
405 TRUE
, /* partial_inplace */
406 0xffffffff, /* src_mask */
407 0xffffffff, /* dst_mask */
408 FALSE
), /* pcrel_offset */
410 HOWTO (R_ARM_RELATIVE
, /* type */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
414 FALSE
, /* pc_relative */
416 complain_overflow_bitfield
,/* complain_on_overflow */
417 bfd_elf_generic_reloc
, /* special_function */
418 "R_ARM_RELATIVE", /* name */
419 TRUE
, /* partial_inplace */
420 0xffffffff, /* src_mask */
421 0xffffffff, /* dst_mask */
422 FALSE
), /* pcrel_offset */
424 HOWTO (R_ARM_GOTOFF32
, /* type */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
428 FALSE
, /* pc_relative */
430 complain_overflow_bitfield
,/* complain_on_overflow */
431 bfd_elf_generic_reloc
, /* special_function */
432 "R_ARM_GOTOFF32", /* name */
433 TRUE
, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 FALSE
), /* pcrel_offset */
438 HOWTO (R_ARM_GOTPC
, /* type */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
442 TRUE
, /* pc_relative */
444 complain_overflow_bitfield
,/* complain_on_overflow */
445 bfd_elf_generic_reloc
, /* special_function */
446 "R_ARM_GOTPC", /* name */
447 TRUE
, /* partial_inplace */
448 0xffffffff, /* src_mask */
449 0xffffffff, /* dst_mask */
450 TRUE
), /* pcrel_offset */
452 HOWTO (R_ARM_GOT32
, /* type */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE
, /* pc_relative */
458 complain_overflow_bitfield
,/* complain_on_overflow */
459 bfd_elf_generic_reloc
, /* special_function */
460 "R_ARM_GOT32", /* name */
461 TRUE
, /* partial_inplace */
462 0xffffffff, /* src_mask */
463 0xffffffff, /* dst_mask */
464 FALSE
), /* pcrel_offset */
466 HOWTO (R_ARM_PLT32
, /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 TRUE
, /* pc_relative */
472 complain_overflow_bitfield
,/* complain_on_overflow */
473 bfd_elf_generic_reloc
, /* special_function */
474 "R_ARM_PLT32", /* name */
475 FALSE
, /* partial_inplace */
476 0x00ffffff, /* src_mask */
477 0x00ffffff, /* dst_mask */
478 TRUE
), /* pcrel_offset */
480 HOWTO (R_ARM_CALL
, /* type */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
484 TRUE
, /* pc_relative */
486 complain_overflow_signed
,/* complain_on_overflow */
487 bfd_elf_generic_reloc
, /* special_function */
488 "R_ARM_CALL", /* name */
489 FALSE
, /* partial_inplace */
490 0x00ffffff, /* src_mask */
491 0x00ffffff, /* dst_mask */
492 TRUE
), /* pcrel_offset */
494 HOWTO (R_ARM_JUMP24
, /* type */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
498 TRUE
, /* pc_relative */
500 complain_overflow_signed
,/* complain_on_overflow */
501 bfd_elf_generic_reloc
, /* special_function */
502 "R_ARM_JUMP24", /* name */
503 FALSE
, /* partial_inplace */
504 0x00ffffff, /* src_mask */
505 0x00ffffff, /* dst_mask */
506 TRUE
), /* pcrel_offset */
508 HOWTO (R_ARM_THM_JUMP24
, /* type */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
512 TRUE
, /* pc_relative */
514 complain_overflow_signed
,/* complain_on_overflow */
515 bfd_elf_generic_reloc
, /* special_function */
516 "R_ARM_THM_JUMP24", /* name */
517 FALSE
, /* partial_inplace */
518 0x07ff2fff, /* src_mask */
519 0x07ff2fff, /* dst_mask */
520 TRUE
), /* pcrel_offset */
522 HOWTO (R_ARM_BASE_ABS
, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 FALSE
, /* pc_relative */
528 complain_overflow_dont
,/* complain_on_overflow */
529 bfd_elf_generic_reloc
, /* special_function */
530 "R_ARM_BASE_ABS", /* name */
531 FALSE
, /* partial_inplace */
532 0xffffffff, /* src_mask */
533 0xffffffff, /* dst_mask */
534 FALSE
), /* pcrel_offset */
536 HOWTO (R_ARM_ALU_PCREL7_0
, /* type */
538 2, /* size (0 = byte, 1 = short, 2 = long) */
540 TRUE
, /* pc_relative */
542 complain_overflow_dont
,/* complain_on_overflow */
543 bfd_elf_generic_reloc
, /* special_function */
544 "R_ARM_ALU_PCREL_7_0", /* name */
545 FALSE
, /* partial_inplace */
546 0x00000fff, /* src_mask */
547 0x00000fff, /* dst_mask */
548 TRUE
), /* pcrel_offset */
550 HOWTO (R_ARM_ALU_PCREL15_8
, /* type */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
554 TRUE
, /* pc_relative */
556 complain_overflow_dont
,/* complain_on_overflow */
557 bfd_elf_generic_reloc
, /* special_function */
558 "R_ARM_ALU_PCREL_15_8",/* name */
559 FALSE
, /* partial_inplace */
560 0x00000fff, /* src_mask */
561 0x00000fff, /* dst_mask */
562 TRUE
), /* pcrel_offset */
564 HOWTO (R_ARM_ALU_PCREL23_15
, /* type */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
568 TRUE
, /* pc_relative */
570 complain_overflow_dont
,/* complain_on_overflow */
571 bfd_elf_generic_reloc
, /* special_function */
572 "R_ARM_ALU_PCREL_23_15",/* name */
573 FALSE
, /* partial_inplace */
574 0x00000fff, /* src_mask */
575 0x00000fff, /* dst_mask */
576 TRUE
), /* pcrel_offset */
578 HOWTO (R_ARM_LDR_SBREL_11_0
, /* type */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
582 FALSE
, /* pc_relative */
584 complain_overflow_dont
,/* complain_on_overflow */
585 bfd_elf_generic_reloc
, /* special_function */
586 "R_ARM_LDR_SBREL_11_0",/* name */
587 FALSE
, /* partial_inplace */
588 0x00000fff, /* src_mask */
589 0x00000fff, /* dst_mask */
590 FALSE
), /* pcrel_offset */
592 HOWTO (R_ARM_ALU_SBREL_19_12
, /* type */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
596 FALSE
, /* pc_relative */
598 complain_overflow_dont
,/* complain_on_overflow */
599 bfd_elf_generic_reloc
, /* special_function */
600 "R_ARM_ALU_SBREL_19_12",/* name */
601 FALSE
, /* partial_inplace */
602 0x000ff000, /* src_mask */
603 0x000ff000, /* dst_mask */
604 FALSE
), /* pcrel_offset */
606 HOWTO (R_ARM_ALU_SBREL_27_20
, /* type */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
610 FALSE
, /* pc_relative */
612 complain_overflow_dont
,/* complain_on_overflow */
613 bfd_elf_generic_reloc
, /* special_function */
614 "R_ARM_ALU_SBREL_27_20",/* name */
615 FALSE
, /* partial_inplace */
616 0x0ff00000, /* src_mask */
617 0x0ff00000, /* dst_mask */
618 FALSE
), /* pcrel_offset */
620 HOWTO (R_ARM_TARGET1
, /* type */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
624 FALSE
, /* pc_relative */
626 complain_overflow_dont
,/* complain_on_overflow */
627 bfd_elf_generic_reloc
, /* special_function */
628 "R_ARM_TARGET1", /* name */
629 FALSE
, /* partial_inplace */
630 0xffffffff, /* src_mask */
631 0xffffffff, /* dst_mask */
632 FALSE
), /* pcrel_offset */
634 HOWTO (R_ARM_ROSEGREL32
, /* type */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
638 FALSE
, /* pc_relative */
640 complain_overflow_dont
,/* complain_on_overflow */
641 bfd_elf_generic_reloc
, /* special_function */
642 "R_ARM_ROSEGREL32", /* name */
643 FALSE
, /* partial_inplace */
644 0xffffffff, /* src_mask */
645 0xffffffff, /* dst_mask */
646 FALSE
), /* pcrel_offset */
648 HOWTO (R_ARM_V4BX
, /* type */
650 2, /* size (0 = byte, 1 = short, 2 = long) */
652 FALSE
, /* pc_relative */
654 complain_overflow_dont
,/* complain_on_overflow */
655 bfd_elf_generic_reloc
, /* special_function */
656 "R_ARM_V4BX", /* name */
657 FALSE
, /* partial_inplace */
658 0xffffffff, /* src_mask */
659 0xffffffff, /* dst_mask */
660 FALSE
), /* pcrel_offset */
662 HOWTO (R_ARM_TARGET2
, /* type */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
666 FALSE
, /* pc_relative */
668 complain_overflow_signed
,/* complain_on_overflow */
669 bfd_elf_generic_reloc
, /* special_function */
670 "R_ARM_TARGET2", /* name */
671 FALSE
, /* partial_inplace */
672 0xffffffff, /* src_mask */
673 0xffffffff, /* dst_mask */
674 TRUE
), /* pcrel_offset */
676 HOWTO (R_ARM_PREL31
, /* type */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
680 TRUE
, /* pc_relative */
682 complain_overflow_signed
,/* complain_on_overflow */
683 bfd_elf_generic_reloc
, /* special_function */
684 "R_ARM_PREL31", /* name */
685 FALSE
, /* partial_inplace */
686 0x7fffffff, /* src_mask */
687 0x7fffffff, /* dst_mask */
688 TRUE
), /* pcrel_offset */
690 HOWTO (R_ARM_MOVW_ABS_NC
, /* type */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
694 FALSE
, /* pc_relative */
696 complain_overflow_dont
,/* complain_on_overflow */
697 bfd_elf_generic_reloc
, /* special_function */
698 "R_ARM_MOVW_ABS_NC", /* name */
699 FALSE
, /* partial_inplace */
700 0x000f0fff, /* src_mask */
701 0x000f0fff, /* dst_mask */
702 FALSE
), /* pcrel_offset */
704 HOWTO (R_ARM_MOVT_ABS
, /* type */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
708 FALSE
, /* pc_relative */
710 complain_overflow_bitfield
,/* complain_on_overflow */
711 bfd_elf_generic_reloc
, /* special_function */
712 "R_ARM_MOVT_ABS", /* name */
713 FALSE
, /* partial_inplace */
714 0x000f0fff, /* src_mask */
715 0x000f0fff, /* dst_mask */
716 FALSE
), /* pcrel_offset */
718 HOWTO (R_ARM_MOVW_PREL_NC
, /* type */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
722 TRUE
, /* pc_relative */
724 complain_overflow_dont
,/* complain_on_overflow */
725 bfd_elf_generic_reloc
, /* special_function */
726 "R_ARM_MOVW_PREL_NC", /* name */
727 FALSE
, /* partial_inplace */
728 0x000f0fff, /* src_mask */
729 0x000f0fff, /* dst_mask */
730 TRUE
), /* pcrel_offset */
732 HOWTO (R_ARM_MOVT_PREL
, /* type */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
736 TRUE
, /* pc_relative */
738 complain_overflow_bitfield
,/* complain_on_overflow */
739 bfd_elf_generic_reloc
, /* special_function */
740 "R_ARM_MOVT_PREL", /* name */
741 FALSE
, /* partial_inplace */
742 0x000f0fff, /* src_mask */
743 0x000f0fff, /* dst_mask */
744 TRUE
), /* pcrel_offset */
746 HOWTO (R_ARM_THM_MOVW_ABS_NC
, /* type */
748 2, /* size (0 = byte, 1 = short, 2 = long) */
750 FALSE
, /* pc_relative */
752 complain_overflow_dont
,/* complain_on_overflow */
753 bfd_elf_generic_reloc
, /* special_function */
754 "R_ARM_THM_MOVW_ABS_NC",/* name */
755 FALSE
, /* partial_inplace */
756 0x040f70ff, /* src_mask */
757 0x040f70ff, /* dst_mask */
758 FALSE
), /* pcrel_offset */
760 HOWTO (R_ARM_THM_MOVT_ABS
, /* type */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
764 FALSE
, /* pc_relative */
766 complain_overflow_bitfield
,/* complain_on_overflow */
767 bfd_elf_generic_reloc
, /* special_function */
768 "R_ARM_THM_MOVT_ABS", /* name */
769 FALSE
, /* partial_inplace */
770 0x040f70ff, /* src_mask */
771 0x040f70ff, /* dst_mask */
772 FALSE
), /* pcrel_offset */
774 HOWTO (R_ARM_THM_MOVW_PREL_NC
,/* type */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
778 TRUE
, /* pc_relative */
780 complain_overflow_dont
,/* complain_on_overflow */
781 bfd_elf_generic_reloc
, /* special_function */
782 "R_ARM_THM_MOVW_PREL_NC",/* name */
783 FALSE
, /* partial_inplace */
784 0x040f70ff, /* src_mask */
785 0x040f70ff, /* dst_mask */
786 TRUE
), /* pcrel_offset */
788 HOWTO (R_ARM_THM_MOVT_PREL
, /* type */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
792 TRUE
, /* pc_relative */
794 complain_overflow_bitfield
,/* complain_on_overflow */
795 bfd_elf_generic_reloc
, /* special_function */
796 "R_ARM_THM_MOVT_PREL", /* name */
797 FALSE
, /* partial_inplace */
798 0x040f70ff, /* src_mask */
799 0x040f70ff, /* dst_mask */
800 TRUE
), /* pcrel_offset */
802 HOWTO (R_ARM_THM_JUMP19
, /* type */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
806 TRUE
, /* pc_relative */
808 complain_overflow_signed
,/* complain_on_overflow */
809 bfd_elf_generic_reloc
, /* special_function */
810 "R_ARM_THM_JUMP19", /* name */
811 FALSE
, /* partial_inplace */
812 0x043f2fff, /* src_mask */
813 0x043f2fff, /* dst_mask */
814 TRUE
), /* pcrel_offset */
816 HOWTO (R_ARM_THM_JUMP6
, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 TRUE
, /* pc_relative */
822 complain_overflow_unsigned
,/* complain_on_overflow */
823 bfd_elf_generic_reloc
, /* special_function */
824 "R_ARM_THM_JUMP6", /* name */
825 FALSE
, /* partial_inplace */
826 0x02f8, /* src_mask */
827 0x02f8, /* dst_mask */
828 TRUE
), /* pcrel_offset */
830 /* These are declared as 13-bit signed relocations because we can
831 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
833 HOWTO (R_ARM_THM_ALU_PREL_11_0
,/* type */
835 2, /* size (0 = byte, 1 = short, 2 = long) */
837 TRUE
, /* pc_relative */
839 complain_overflow_dont
,/* complain_on_overflow */
840 bfd_elf_generic_reloc
, /* special_function */
841 "R_ARM_THM_ALU_PREL_11_0",/* name */
842 FALSE
, /* partial_inplace */
843 0xffffffff, /* src_mask */
844 0xffffffff, /* dst_mask */
845 TRUE
), /* pcrel_offset */
847 HOWTO (R_ARM_THM_PC12
, /* type */
849 2, /* size (0 = byte, 1 = short, 2 = long) */
851 TRUE
, /* pc_relative */
853 complain_overflow_dont
,/* complain_on_overflow */
854 bfd_elf_generic_reloc
, /* special_function */
855 "R_ARM_THM_PC12", /* name */
856 FALSE
, /* partial_inplace */
857 0xffffffff, /* src_mask */
858 0xffffffff, /* dst_mask */
859 TRUE
), /* pcrel_offset */
861 HOWTO (R_ARM_ABS32_NOI
, /* type */
863 2, /* size (0 = byte, 1 = short, 2 = long) */
865 FALSE
, /* pc_relative */
867 complain_overflow_dont
,/* complain_on_overflow */
868 bfd_elf_generic_reloc
, /* special_function */
869 "R_ARM_ABS32_NOI", /* name */
870 FALSE
, /* partial_inplace */
871 0xffffffff, /* src_mask */
872 0xffffffff, /* dst_mask */
873 FALSE
), /* pcrel_offset */
875 HOWTO (R_ARM_REL32_NOI
, /* type */
877 2, /* size (0 = byte, 1 = short, 2 = long) */
879 TRUE
, /* pc_relative */
881 complain_overflow_dont
,/* complain_on_overflow */
882 bfd_elf_generic_reloc
, /* special_function */
883 "R_ARM_REL32_NOI", /* name */
884 FALSE
, /* partial_inplace */
885 0xffffffff, /* src_mask */
886 0xffffffff, /* dst_mask */
887 FALSE
), /* pcrel_offset */
889 /* Group relocations. */
891 HOWTO (R_ARM_ALU_PC_G0_NC
, /* type */
893 2, /* size (0 = byte, 1 = short, 2 = long) */
895 TRUE
, /* pc_relative */
897 complain_overflow_dont
,/* complain_on_overflow */
898 bfd_elf_generic_reloc
, /* special_function */
899 "R_ARM_ALU_PC_G0_NC", /* name */
900 FALSE
, /* partial_inplace */
901 0xffffffff, /* src_mask */
902 0xffffffff, /* dst_mask */
903 TRUE
), /* pcrel_offset */
905 HOWTO (R_ARM_ALU_PC_G0
, /* type */
907 2, /* size (0 = byte, 1 = short, 2 = long) */
909 TRUE
, /* pc_relative */
911 complain_overflow_dont
,/* complain_on_overflow */
912 bfd_elf_generic_reloc
, /* special_function */
913 "R_ARM_ALU_PC_G0", /* name */
914 FALSE
, /* partial_inplace */
915 0xffffffff, /* src_mask */
916 0xffffffff, /* dst_mask */
917 TRUE
), /* pcrel_offset */
919 HOWTO (R_ARM_ALU_PC_G1_NC
, /* type */
921 2, /* size (0 = byte, 1 = short, 2 = long) */
923 TRUE
, /* pc_relative */
925 complain_overflow_dont
,/* complain_on_overflow */
926 bfd_elf_generic_reloc
, /* special_function */
927 "R_ARM_ALU_PC_G1_NC", /* name */
928 FALSE
, /* partial_inplace */
929 0xffffffff, /* src_mask */
930 0xffffffff, /* dst_mask */
931 TRUE
), /* pcrel_offset */
933 HOWTO (R_ARM_ALU_PC_G1
, /* type */
935 2, /* size (0 = byte, 1 = short, 2 = long) */
937 TRUE
, /* pc_relative */
939 complain_overflow_dont
,/* complain_on_overflow */
940 bfd_elf_generic_reloc
, /* special_function */
941 "R_ARM_ALU_PC_G1", /* name */
942 FALSE
, /* partial_inplace */
943 0xffffffff, /* src_mask */
944 0xffffffff, /* dst_mask */
945 TRUE
), /* pcrel_offset */
947 HOWTO (R_ARM_ALU_PC_G2
, /* type */
949 2, /* size (0 = byte, 1 = short, 2 = long) */
951 TRUE
, /* pc_relative */
953 complain_overflow_dont
,/* complain_on_overflow */
954 bfd_elf_generic_reloc
, /* special_function */
955 "R_ARM_ALU_PC_G2", /* name */
956 FALSE
, /* partial_inplace */
957 0xffffffff, /* src_mask */
958 0xffffffff, /* dst_mask */
959 TRUE
), /* pcrel_offset */
961 HOWTO (R_ARM_LDR_PC_G1
, /* type */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
965 TRUE
, /* pc_relative */
967 complain_overflow_dont
,/* complain_on_overflow */
968 bfd_elf_generic_reloc
, /* special_function */
969 "R_ARM_LDR_PC_G1", /* name */
970 FALSE
, /* partial_inplace */
971 0xffffffff, /* src_mask */
972 0xffffffff, /* dst_mask */
973 TRUE
), /* pcrel_offset */
975 HOWTO (R_ARM_LDR_PC_G2
, /* type */
977 2, /* size (0 = byte, 1 = short, 2 = long) */
979 TRUE
, /* pc_relative */
981 complain_overflow_dont
,/* complain_on_overflow */
982 bfd_elf_generic_reloc
, /* special_function */
983 "R_ARM_LDR_PC_G2", /* name */
984 FALSE
, /* partial_inplace */
985 0xffffffff, /* src_mask */
986 0xffffffff, /* dst_mask */
987 TRUE
), /* pcrel_offset */
989 HOWTO (R_ARM_LDRS_PC_G0
, /* type */
991 2, /* size (0 = byte, 1 = short, 2 = long) */
993 TRUE
, /* pc_relative */
995 complain_overflow_dont
,/* complain_on_overflow */
996 bfd_elf_generic_reloc
, /* special_function */
997 "R_ARM_LDRS_PC_G0", /* name */
998 FALSE
, /* partial_inplace */
999 0xffffffff, /* src_mask */
1000 0xffffffff, /* dst_mask */
1001 TRUE
), /* pcrel_offset */
1003 HOWTO (R_ARM_LDRS_PC_G1
, /* type */
1005 2, /* size (0 = byte, 1 = short, 2 = long) */
1007 TRUE
, /* pc_relative */
1009 complain_overflow_dont
,/* complain_on_overflow */
1010 bfd_elf_generic_reloc
, /* special_function */
1011 "R_ARM_LDRS_PC_G1", /* name */
1012 FALSE
, /* partial_inplace */
1013 0xffffffff, /* src_mask */
1014 0xffffffff, /* dst_mask */
1015 TRUE
), /* pcrel_offset */
1017 HOWTO (R_ARM_LDRS_PC_G2
, /* type */
1019 2, /* size (0 = byte, 1 = short, 2 = long) */
1021 TRUE
, /* pc_relative */
1023 complain_overflow_dont
,/* complain_on_overflow */
1024 bfd_elf_generic_reloc
, /* special_function */
1025 "R_ARM_LDRS_PC_G2", /* name */
1026 FALSE
, /* partial_inplace */
1027 0xffffffff, /* src_mask */
1028 0xffffffff, /* dst_mask */
1029 TRUE
), /* pcrel_offset */
1031 HOWTO (R_ARM_LDC_PC_G0
, /* type */
1033 2, /* size (0 = byte, 1 = short, 2 = long) */
1035 TRUE
, /* pc_relative */
1037 complain_overflow_dont
,/* complain_on_overflow */
1038 bfd_elf_generic_reloc
, /* special_function */
1039 "R_ARM_LDC_PC_G0", /* name */
1040 FALSE
, /* partial_inplace */
1041 0xffffffff, /* src_mask */
1042 0xffffffff, /* dst_mask */
1043 TRUE
), /* pcrel_offset */
1045 HOWTO (R_ARM_LDC_PC_G1
, /* type */
1047 2, /* size (0 = byte, 1 = short, 2 = long) */
1049 TRUE
, /* pc_relative */
1051 complain_overflow_dont
,/* complain_on_overflow */
1052 bfd_elf_generic_reloc
, /* special_function */
1053 "R_ARM_LDC_PC_G1", /* name */
1054 FALSE
, /* partial_inplace */
1055 0xffffffff, /* src_mask */
1056 0xffffffff, /* dst_mask */
1057 TRUE
), /* pcrel_offset */
1059 HOWTO (R_ARM_LDC_PC_G2
, /* type */
1061 2, /* size (0 = byte, 1 = short, 2 = long) */
1063 TRUE
, /* pc_relative */
1065 complain_overflow_dont
,/* complain_on_overflow */
1066 bfd_elf_generic_reloc
, /* special_function */
1067 "R_ARM_LDC_PC_G2", /* name */
1068 FALSE
, /* partial_inplace */
1069 0xffffffff, /* src_mask */
1070 0xffffffff, /* dst_mask */
1071 TRUE
), /* pcrel_offset */
1073 HOWTO (R_ARM_ALU_SB_G0_NC
, /* type */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1077 TRUE
, /* pc_relative */
1079 complain_overflow_dont
,/* complain_on_overflow */
1080 bfd_elf_generic_reloc
, /* special_function */
1081 "R_ARM_ALU_SB_G0_NC", /* name */
1082 FALSE
, /* partial_inplace */
1083 0xffffffff, /* src_mask */
1084 0xffffffff, /* dst_mask */
1085 TRUE
), /* pcrel_offset */
1087 HOWTO (R_ARM_ALU_SB_G0
, /* type */
1089 2, /* size (0 = byte, 1 = short, 2 = long) */
1091 TRUE
, /* pc_relative */
1093 complain_overflow_dont
,/* complain_on_overflow */
1094 bfd_elf_generic_reloc
, /* special_function */
1095 "R_ARM_ALU_SB_G0", /* name */
1096 FALSE
, /* partial_inplace */
1097 0xffffffff, /* src_mask */
1098 0xffffffff, /* dst_mask */
1099 TRUE
), /* pcrel_offset */
1101 HOWTO (R_ARM_ALU_SB_G1_NC
, /* type */
1103 2, /* size (0 = byte, 1 = short, 2 = long) */
1105 TRUE
, /* pc_relative */
1107 complain_overflow_dont
,/* complain_on_overflow */
1108 bfd_elf_generic_reloc
, /* special_function */
1109 "R_ARM_ALU_SB_G1_NC", /* name */
1110 FALSE
, /* partial_inplace */
1111 0xffffffff, /* src_mask */
1112 0xffffffff, /* dst_mask */
1113 TRUE
), /* pcrel_offset */
1115 HOWTO (R_ARM_ALU_SB_G1
, /* type */
1117 2, /* size (0 = byte, 1 = short, 2 = long) */
1119 TRUE
, /* pc_relative */
1121 complain_overflow_dont
,/* complain_on_overflow */
1122 bfd_elf_generic_reloc
, /* special_function */
1123 "R_ARM_ALU_SB_G1", /* name */
1124 FALSE
, /* partial_inplace */
1125 0xffffffff, /* src_mask */
1126 0xffffffff, /* dst_mask */
1127 TRUE
), /* pcrel_offset */
1129 HOWTO (R_ARM_ALU_SB_G2
, /* type */
1131 2, /* size (0 = byte, 1 = short, 2 = long) */
1133 TRUE
, /* pc_relative */
1135 complain_overflow_dont
,/* complain_on_overflow */
1136 bfd_elf_generic_reloc
, /* special_function */
1137 "R_ARM_ALU_SB_G2", /* name */
1138 FALSE
, /* partial_inplace */
1139 0xffffffff, /* src_mask */
1140 0xffffffff, /* dst_mask */
1141 TRUE
), /* pcrel_offset */
1143 HOWTO (R_ARM_LDR_SB_G0
, /* type */
1145 2, /* size (0 = byte, 1 = short, 2 = long) */
1147 TRUE
, /* pc_relative */
1149 complain_overflow_dont
,/* complain_on_overflow */
1150 bfd_elf_generic_reloc
, /* special_function */
1151 "R_ARM_LDR_SB_G0", /* name */
1152 FALSE
, /* partial_inplace */
1153 0xffffffff, /* src_mask */
1154 0xffffffff, /* dst_mask */
1155 TRUE
), /* pcrel_offset */
1157 HOWTO (R_ARM_LDR_SB_G1
, /* type */
1159 2, /* size (0 = byte, 1 = short, 2 = long) */
1161 TRUE
, /* pc_relative */
1163 complain_overflow_dont
,/* complain_on_overflow */
1164 bfd_elf_generic_reloc
, /* special_function */
1165 "R_ARM_LDR_SB_G1", /* name */
1166 FALSE
, /* partial_inplace */
1167 0xffffffff, /* src_mask */
1168 0xffffffff, /* dst_mask */
1169 TRUE
), /* pcrel_offset */
1171 HOWTO (R_ARM_LDR_SB_G2
, /* type */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1175 TRUE
, /* pc_relative */
1177 complain_overflow_dont
,/* complain_on_overflow */
1178 bfd_elf_generic_reloc
, /* special_function */
1179 "R_ARM_LDR_SB_G2", /* name */
1180 FALSE
, /* partial_inplace */
1181 0xffffffff, /* src_mask */
1182 0xffffffff, /* dst_mask */
1183 TRUE
), /* pcrel_offset */
1185 HOWTO (R_ARM_LDRS_SB_G0
, /* type */
1187 2, /* size (0 = byte, 1 = short, 2 = long) */
1189 TRUE
, /* pc_relative */
1191 complain_overflow_dont
,/* complain_on_overflow */
1192 bfd_elf_generic_reloc
, /* special_function */
1193 "R_ARM_LDRS_SB_G0", /* name */
1194 FALSE
, /* partial_inplace */
1195 0xffffffff, /* src_mask */
1196 0xffffffff, /* dst_mask */
1197 TRUE
), /* pcrel_offset */
1199 HOWTO (R_ARM_LDRS_SB_G1
, /* type */
1201 2, /* size (0 = byte, 1 = short, 2 = long) */
1203 TRUE
, /* pc_relative */
1205 complain_overflow_dont
,/* complain_on_overflow */
1206 bfd_elf_generic_reloc
, /* special_function */
1207 "R_ARM_LDRS_SB_G1", /* name */
1208 FALSE
, /* partial_inplace */
1209 0xffffffff, /* src_mask */
1210 0xffffffff, /* dst_mask */
1211 TRUE
), /* pcrel_offset */
1213 HOWTO (R_ARM_LDRS_SB_G2
, /* type */
1215 2, /* size (0 = byte, 1 = short, 2 = long) */
1217 TRUE
, /* pc_relative */
1219 complain_overflow_dont
,/* complain_on_overflow */
1220 bfd_elf_generic_reloc
, /* special_function */
1221 "R_ARM_LDRS_SB_G2", /* name */
1222 FALSE
, /* partial_inplace */
1223 0xffffffff, /* src_mask */
1224 0xffffffff, /* dst_mask */
1225 TRUE
), /* pcrel_offset */
1227 HOWTO (R_ARM_LDC_SB_G0
, /* type */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1231 TRUE
, /* pc_relative */
1233 complain_overflow_dont
,/* complain_on_overflow */
1234 bfd_elf_generic_reloc
, /* special_function */
1235 "R_ARM_LDC_SB_G0", /* name */
1236 FALSE
, /* partial_inplace */
1237 0xffffffff, /* src_mask */
1238 0xffffffff, /* dst_mask */
1239 TRUE
), /* pcrel_offset */
1241 HOWTO (R_ARM_LDC_SB_G1
, /* type */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1245 TRUE
, /* pc_relative */
1247 complain_overflow_dont
,/* complain_on_overflow */
1248 bfd_elf_generic_reloc
, /* special_function */
1249 "R_ARM_LDC_SB_G1", /* name */
1250 FALSE
, /* partial_inplace */
1251 0xffffffff, /* src_mask */
1252 0xffffffff, /* dst_mask */
1253 TRUE
), /* pcrel_offset */
1255 HOWTO (R_ARM_LDC_SB_G2
, /* type */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1259 TRUE
, /* pc_relative */
1261 complain_overflow_dont
,/* complain_on_overflow */
1262 bfd_elf_generic_reloc
, /* special_function */
1263 "R_ARM_LDC_SB_G2", /* name */
1264 FALSE
, /* partial_inplace */
1265 0xffffffff, /* src_mask */
1266 0xffffffff, /* dst_mask */
1267 TRUE
), /* pcrel_offset */
1269 /* End of group relocations. */
1271 HOWTO (R_ARM_MOVW_BREL_NC
, /* type */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1275 FALSE
, /* pc_relative */
1277 complain_overflow_dont
,/* complain_on_overflow */
1278 bfd_elf_generic_reloc
, /* special_function */
1279 "R_ARM_MOVW_BREL_NC", /* name */
1280 FALSE
, /* partial_inplace */
1281 0x0000ffff, /* src_mask */
1282 0x0000ffff, /* dst_mask */
1283 FALSE
), /* pcrel_offset */
1285 HOWTO (R_ARM_MOVT_BREL
, /* type */
1287 2, /* size (0 = byte, 1 = short, 2 = long) */
1289 FALSE
, /* pc_relative */
1291 complain_overflow_bitfield
,/* complain_on_overflow */
1292 bfd_elf_generic_reloc
, /* special_function */
1293 "R_ARM_MOVT_BREL", /* name */
1294 FALSE
, /* partial_inplace */
1295 0x0000ffff, /* src_mask */
1296 0x0000ffff, /* dst_mask */
1297 FALSE
), /* pcrel_offset */
1299 HOWTO (R_ARM_MOVW_BREL
, /* type */
1301 2, /* size (0 = byte, 1 = short, 2 = long) */
1303 FALSE
, /* pc_relative */
1305 complain_overflow_dont
,/* complain_on_overflow */
1306 bfd_elf_generic_reloc
, /* special_function */
1307 "R_ARM_MOVW_BREL", /* name */
1308 FALSE
, /* partial_inplace */
1309 0x0000ffff, /* src_mask */
1310 0x0000ffff, /* dst_mask */
1311 FALSE
), /* pcrel_offset */
1313 HOWTO (R_ARM_THM_MOVW_BREL_NC
,/* type */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1317 FALSE
, /* pc_relative */
1319 complain_overflow_dont
,/* complain_on_overflow */
1320 bfd_elf_generic_reloc
, /* special_function */
1321 "R_ARM_THM_MOVW_BREL_NC",/* name */
1322 FALSE
, /* partial_inplace */
1323 0x040f70ff, /* src_mask */
1324 0x040f70ff, /* dst_mask */
1325 FALSE
), /* pcrel_offset */
1327 HOWTO (R_ARM_THM_MOVT_BREL
, /* type */
1329 2, /* size (0 = byte, 1 = short, 2 = long) */
1331 FALSE
, /* pc_relative */
1333 complain_overflow_bitfield
,/* complain_on_overflow */
1334 bfd_elf_generic_reloc
, /* special_function */
1335 "R_ARM_THM_MOVT_BREL", /* name */
1336 FALSE
, /* partial_inplace */
1337 0x040f70ff, /* src_mask */
1338 0x040f70ff, /* dst_mask */
1339 FALSE
), /* pcrel_offset */
1341 HOWTO (R_ARM_THM_MOVW_BREL
, /* type */
1343 2, /* size (0 = byte, 1 = short, 2 = long) */
1345 FALSE
, /* pc_relative */
1347 complain_overflow_dont
,/* complain_on_overflow */
1348 bfd_elf_generic_reloc
, /* special_function */
1349 "R_ARM_THM_MOVW_BREL", /* name */
1350 FALSE
, /* partial_inplace */
1351 0x040f70ff, /* src_mask */
1352 0x040f70ff, /* dst_mask */
1353 FALSE
), /* pcrel_offset */
1355 HOWTO (R_ARM_TLS_GOTDESC
, /* type */
1357 2, /* size (0 = byte, 1 = short, 2 = long) */
1359 FALSE
, /* pc_relative */
1361 complain_overflow_bitfield
,/* complain_on_overflow */
1362 NULL
, /* special_function */
1363 "R_ARM_TLS_GOTDESC", /* name */
1364 TRUE
, /* partial_inplace */
1365 0xffffffff, /* src_mask */
1366 0xffffffff, /* dst_mask */
1367 FALSE
), /* pcrel_offset */
1369 HOWTO (R_ARM_TLS_CALL
, /* type */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1373 FALSE
, /* pc_relative */
1375 complain_overflow_dont
,/* complain_on_overflow */
1376 bfd_elf_generic_reloc
, /* special_function */
1377 "R_ARM_TLS_CALL", /* name */
1378 FALSE
, /* partial_inplace */
1379 0x00ffffff, /* src_mask */
1380 0x00ffffff, /* dst_mask */
1381 FALSE
), /* pcrel_offset */
1383 HOWTO (R_ARM_TLS_DESCSEQ
, /* type */
1385 2, /* size (0 = byte, 1 = short, 2 = long) */
1387 FALSE
, /* pc_relative */
1389 complain_overflow_bitfield
,/* complain_on_overflow */
1390 bfd_elf_generic_reloc
, /* special_function */
1391 "R_ARM_TLS_DESCSEQ", /* name */
1392 FALSE
, /* partial_inplace */
1393 0x00000000, /* src_mask */
1394 0x00000000, /* dst_mask */
1395 FALSE
), /* pcrel_offset */
1397 HOWTO (R_ARM_THM_TLS_CALL
, /* type */
1399 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 FALSE
, /* pc_relative */
1403 complain_overflow_dont
,/* complain_on_overflow */
1404 bfd_elf_generic_reloc
, /* special_function */
1405 "R_ARM_THM_TLS_CALL", /* name */
1406 FALSE
, /* partial_inplace */
1407 0x07ff07ff, /* src_mask */
1408 0x07ff07ff, /* dst_mask */
1409 FALSE
), /* pcrel_offset */
1411 HOWTO (R_ARM_PLT32_ABS
, /* type */
1413 2, /* size (0 = byte, 1 = short, 2 = long) */
1415 FALSE
, /* pc_relative */
1417 complain_overflow_dont
,/* complain_on_overflow */
1418 bfd_elf_generic_reloc
, /* special_function */
1419 "R_ARM_PLT32_ABS", /* name */
1420 FALSE
, /* partial_inplace */
1421 0xffffffff, /* src_mask */
1422 0xffffffff, /* dst_mask */
1423 FALSE
), /* pcrel_offset */
1425 HOWTO (R_ARM_GOT_ABS
, /* type */
1427 2, /* size (0 = byte, 1 = short, 2 = long) */
1429 FALSE
, /* pc_relative */
1431 complain_overflow_dont
,/* complain_on_overflow */
1432 bfd_elf_generic_reloc
, /* special_function */
1433 "R_ARM_GOT_ABS", /* name */
1434 FALSE
, /* partial_inplace */
1435 0xffffffff, /* src_mask */
1436 0xffffffff, /* dst_mask */
1437 FALSE
), /* pcrel_offset */
1439 HOWTO (R_ARM_GOT_PREL
, /* type */
1441 2, /* size (0 = byte, 1 = short, 2 = long) */
1443 TRUE
, /* pc_relative */
1445 complain_overflow_dont
, /* complain_on_overflow */
1446 bfd_elf_generic_reloc
, /* special_function */
1447 "R_ARM_GOT_PREL", /* name */
1448 FALSE
, /* partial_inplace */
1449 0xffffffff, /* src_mask */
1450 0xffffffff, /* dst_mask */
1451 TRUE
), /* pcrel_offset */
1453 HOWTO (R_ARM_GOT_BREL12
, /* type */
1455 2, /* size (0 = byte, 1 = short, 2 = long) */
1457 FALSE
, /* pc_relative */
1459 complain_overflow_bitfield
,/* complain_on_overflow */
1460 bfd_elf_generic_reloc
, /* special_function */
1461 "R_ARM_GOT_BREL12", /* name */
1462 FALSE
, /* partial_inplace */
1463 0x00000fff, /* src_mask */
1464 0x00000fff, /* dst_mask */
1465 FALSE
), /* pcrel_offset */
1467 HOWTO (R_ARM_GOTOFF12
, /* type */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1471 FALSE
, /* pc_relative */
1473 complain_overflow_bitfield
,/* complain_on_overflow */
1474 bfd_elf_generic_reloc
, /* special_function */
1475 "R_ARM_GOTOFF12", /* name */
1476 FALSE
, /* partial_inplace */
1477 0x00000fff, /* src_mask */
1478 0x00000fff, /* dst_mask */
1479 FALSE
), /* pcrel_offset */
1481 EMPTY_HOWTO (R_ARM_GOTRELAX
), /* reserved for future GOT-load optimizations */
1483 /* GNU extension to record C++ vtable member usage */
1484 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
1486 2, /* size (0 = byte, 1 = short, 2 = long) */
1488 FALSE
, /* pc_relative */
1490 complain_overflow_dont
, /* complain_on_overflow */
1491 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
1492 "R_ARM_GNU_VTENTRY", /* name */
1493 FALSE
, /* partial_inplace */
1496 FALSE
), /* pcrel_offset */
1498 /* GNU extension to record C++ vtable hierarchy */
1499 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
1501 2, /* size (0 = byte, 1 = short, 2 = long) */
1503 FALSE
, /* pc_relative */
1505 complain_overflow_dont
, /* complain_on_overflow */
1506 NULL
, /* special_function */
1507 "R_ARM_GNU_VTINHERIT", /* name */
1508 FALSE
, /* partial_inplace */
1511 FALSE
), /* pcrel_offset */
1513 HOWTO (R_ARM_THM_JUMP11
, /* type */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 TRUE
, /* pc_relative */
1519 complain_overflow_signed
, /* complain_on_overflow */
1520 bfd_elf_generic_reloc
, /* special_function */
1521 "R_ARM_THM_JUMP11", /* name */
1522 FALSE
, /* partial_inplace */
1523 0x000007ff, /* src_mask */
1524 0x000007ff, /* dst_mask */
1525 TRUE
), /* pcrel_offset */
1527 HOWTO (R_ARM_THM_JUMP8
, /* type */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 TRUE
, /* pc_relative */
1533 complain_overflow_signed
, /* complain_on_overflow */
1534 bfd_elf_generic_reloc
, /* special_function */
1535 "R_ARM_THM_JUMP8", /* name */
1536 FALSE
, /* partial_inplace */
1537 0x000000ff, /* src_mask */
1538 0x000000ff, /* dst_mask */
1539 TRUE
), /* pcrel_offset */
1541 /* TLS relocations */
1542 HOWTO (R_ARM_TLS_GD32
, /* type */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1546 FALSE
, /* pc_relative */
1548 complain_overflow_bitfield
,/* complain_on_overflow */
1549 NULL
, /* special_function */
1550 "R_ARM_TLS_GD32", /* name */
1551 TRUE
, /* partial_inplace */
1552 0xffffffff, /* src_mask */
1553 0xffffffff, /* dst_mask */
1554 FALSE
), /* pcrel_offset */
1556 HOWTO (R_ARM_TLS_LDM32
, /* type */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 FALSE
, /* pc_relative */
1562 complain_overflow_bitfield
,/* complain_on_overflow */
1563 bfd_elf_generic_reloc
, /* special_function */
1564 "R_ARM_TLS_LDM32", /* name */
1565 TRUE
, /* partial_inplace */
1566 0xffffffff, /* src_mask */
1567 0xffffffff, /* dst_mask */
1568 FALSE
), /* pcrel_offset */
1570 HOWTO (R_ARM_TLS_LDO32
, /* type */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1574 FALSE
, /* pc_relative */
1576 complain_overflow_bitfield
,/* complain_on_overflow */
1577 bfd_elf_generic_reloc
, /* special_function */
1578 "R_ARM_TLS_LDO32", /* name */
1579 TRUE
, /* partial_inplace */
1580 0xffffffff, /* src_mask */
1581 0xffffffff, /* dst_mask */
1582 FALSE
), /* pcrel_offset */
1584 HOWTO (R_ARM_TLS_IE32
, /* type */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 FALSE
, /* pc_relative */
1590 complain_overflow_bitfield
,/* complain_on_overflow */
1591 NULL
, /* special_function */
1592 "R_ARM_TLS_IE32", /* name */
1593 TRUE
, /* partial_inplace */
1594 0xffffffff, /* src_mask */
1595 0xffffffff, /* dst_mask */
1596 FALSE
), /* pcrel_offset */
1598 HOWTO (R_ARM_TLS_LE32
, /* type */
1600 2, /* size (0 = byte, 1 = short, 2 = long) */
1602 FALSE
, /* pc_relative */
1604 complain_overflow_bitfield
,/* complain_on_overflow */
1605 bfd_elf_generic_reloc
, /* special_function */
1606 "R_ARM_TLS_LE32", /* name */
1607 TRUE
, /* partial_inplace */
1608 0xffffffff, /* src_mask */
1609 0xffffffff, /* dst_mask */
1610 FALSE
), /* pcrel_offset */
1612 HOWTO (R_ARM_TLS_LDO12
, /* type */
1614 2, /* size (0 = byte, 1 = short, 2 = long) */
1616 FALSE
, /* pc_relative */
1618 complain_overflow_bitfield
,/* complain_on_overflow */
1619 bfd_elf_generic_reloc
, /* special_function */
1620 "R_ARM_TLS_LDO12", /* name */
1621 FALSE
, /* partial_inplace */
1622 0x00000fff, /* src_mask */
1623 0x00000fff, /* dst_mask */
1624 FALSE
), /* pcrel_offset */
1626 HOWTO (R_ARM_TLS_LE12
, /* type */
1628 2, /* size (0 = byte, 1 = short, 2 = long) */
1630 FALSE
, /* pc_relative */
1632 complain_overflow_bitfield
,/* complain_on_overflow */
1633 bfd_elf_generic_reloc
, /* special_function */
1634 "R_ARM_TLS_LE12", /* name */
1635 FALSE
, /* partial_inplace */
1636 0x00000fff, /* src_mask */
1637 0x00000fff, /* dst_mask */
1638 FALSE
), /* pcrel_offset */
1640 HOWTO (R_ARM_TLS_IE12GP
, /* type */
1642 2, /* size (0 = byte, 1 = short, 2 = long) */
1644 FALSE
, /* pc_relative */
1646 complain_overflow_bitfield
,/* complain_on_overflow */
1647 bfd_elf_generic_reloc
, /* special_function */
1648 "R_ARM_TLS_IE12GP", /* name */
1649 FALSE
, /* partial_inplace */
1650 0x00000fff, /* src_mask */
1651 0x00000fff, /* dst_mask */
1652 FALSE
), /* pcrel_offset */
1654 /* 112-127 private relocations. */
1672 /* R_ARM_ME_TOO, obsolete. */
1675 HOWTO (R_ARM_THM_TLS_DESCSEQ
, /* type */
1677 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 FALSE
, /* pc_relative */
1681 complain_overflow_bitfield
,/* complain_on_overflow */
1682 bfd_elf_generic_reloc
, /* special_function */
1683 "R_ARM_THM_TLS_DESCSEQ",/* name */
1684 FALSE
, /* partial_inplace */
1685 0x00000000, /* src_mask */
1686 0x00000000, /* dst_mask */
1687 FALSE
), /* pcrel_offset */
1691 static reloc_howto_type elf32_arm_howto_table_2
[1] =
1693 HOWTO (R_ARM_IRELATIVE
, /* type */
1695 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 FALSE
, /* pc_relative */
1699 complain_overflow_bitfield
,/* complain_on_overflow */
1700 bfd_elf_generic_reloc
, /* special_function */
1701 "R_ARM_IRELATIVE", /* name */
1702 TRUE
, /* partial_inplace */
1703 0xffffffff, /* src_mask */
1704 0xffffffff, /* dst_mask */
1705 FALSE
) /* pcrel_offset */
1708 /* 249-255 extended, currently unused, relocations: */
1709 static reloc_howto_type elf32_arm_howto_table_3
[4] =
1711 HOWTO (R_ARM_RREL32
, /* type */
1713 0, /* size (0 = byte, 1 = short, 2 = long) */
1715 FALSE
, /* pc_relative */
1717 complain_overflow_dont
,/* complain_on_overflow */
1718 bfd_elf_generic_reloc
, /* special_function */
1719 "R_ARM_RREL32", /* name */
1720 FALSE
, /* partial_inplace */
1723 FALSE
), /* pcrel_offset */
1725 HOWTO (R_ARM_RABS32
, /* type */
1727 0, /* size (0 = byte, 1 = short, 2 = long) */
1729 FALSE
, /* pc_relative */
1731 complain_overflow_dont
,/* complain_on_overflow */
1732 bfd_elf_generic_reloc
, /* special_function */
1733 "R_ARM_RABS32", /* name */
1734 FALSE
, /* partial_inplace */
1737 FALSE
), /* pcrel_offset */
1739 HOWTO (R_ARM_RPC24
, /* type */
1741 0, /* size (0 = byte, 1 = short, 2 = long) */
1743 FALSE
, /* pc_relative */
1745 complain_overflow_dont
,/* complain_on_overflow */
1746 bfd_elf_generic_reloc
, /* special_function */
1747 "R_ARM_RPC24", /* name */
1748 FALSE
, /* partial_inplace */
1751 FALSE
), /* pcrel_offset */
1753 HOWTO (R_ARM_RBASE
, /* type */
1755 0, /* size (0 = byte, 1 = short, 2 = long) */
1757 FALSE
, /* pc_relative */
1759 complain_overflow_dont
,/* complain_on_overflow */
1760 bfd_elf_generic_reloc
, /* special_function */
1761 "R_ARM_RBASE", /* name */
1762 FALSE
, /* partial_inplace */
1765 FALSE
) /* pcrel_offset */
1768 static reloc_howto_type
*
1769 elf32_arm_howto_from_type (unsigned int r_type
)
1771 if (r_type
< ARRAY_SIZE (elf32_arm_howto_table_1
))
1772 return &elf32_arm_howto_table_1
[r_type
];
1774 if (r_type
== R_ARM_IRELATIVE
)
1775 return &elf32_arm_howto_table_2
[r_type
- R_ARM_IRELATIVE
];
1777 if (r_type
>= R_ARM_RREL32
1778 && r_type
< R_ARM_RREL32
+ ARRAY_SIZE (elf32_arm_howto_table_3
))
1779 return &elf32_arm_howto_table_3
[r_type
- R_ARM_RREL32
];
1785 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
1786 Elf_Internal_Rela
* elf_reloc
)
1788 unsigned int r_type
;
1790 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
1791 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
1794 struct elf32_arm_reloc_map
1796 bfd_reloc_code_real_type bfd_reloc_val
;
1797 unsigned char elf_reloc_val
;
1800 /* All entries in this list must also be present in elf32_arm_howto_table. */
1801 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
1803 {BFD_RELOC_NONE
, R_ARM_NONE
},
1804 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
1805 {BFD_RELOC_ARM_PCREL_CALL
, R_ARM_CALL
},
1806 {BFD_RELOC_ARM_PCREL_JUMP
, R_ARM_JUMP24
},
1807 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
1808 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
1809 {BFD_RELOC_32
, R_ARM_ABS32
},
1810 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
1811 {BFD_RELOC_8
, R_ARM_ABS8
},
1812 {BFD_RELOC_16
, R_ARM_ABS16
},
1813 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
1814 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
1815 {BFD_RELOC_THUMB_PCREL_BRANCH25
, R_ARM_THM_JUMP24
},
1816 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_CALL
},
1817 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_JUMP11
},
1818 {BFD_RELOC_THUMB_PCREL_BRANCH20
, R_ARM_THM_JUMP19
},
1819 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_JUMP8
},
1820 {BFD_RELOC_THUMB_PCREL_BRANCH7
, R_ARM_THM_JUMP6
},
1821 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
1822 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
1823 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
1824 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF32
},
1825 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
1826 {BFD_RELOC_ARM_GOT_PREL
, R_ARM_GOT_PREL
},
1827 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
1828 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1829 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
1830 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
1831 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
1832 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
1833 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
},
1834 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1835 {BFD_RELOC_ARM_TLS_GOTDESC
, R_ARM_TLS_GOTDESC
},
1836 {BFD_RELOC_ARM_TLS_CALL
, R_ARM_TLS_CALL
},
1837 {BFD_RELOC_ARM_THM_TLS_CALL
, R_ARM_THM_TLS_CALL
},
1838 {BFD_RELOC_ARM_TLS_DESCSEQ
, R_ARM_TLS_DESCSEQ
},
1839 {BFD_RELOC_ARM_THM_TLS_DESCSEQ
, R_ARM_THM_TLS_DESCSEQ
},
1840 {BFD_RELOC_ARM_TLS_DESC
, R_ARM_TLS_DESC
},
1841 {BFD_RELOC_ARM_TLS_GD32
, R_ARM_TLS_GD32
},
1842 {BFD_RELOC_ARM_TLS_LDO32
, R_ARM_TLS_LDO32
},
1843 {BFD_RELOC_ARM_TLS_LDM32
, R_ARM_TLS_LDM32
},
1844 {BFD_RELOC_ARM_TLS_DTPMOD32
, R_ARM_TLS_DTPMOD32
},
1845 {BFD_RELOC_ARM_TLS_DTPOFF32
, R_ARM_TLS_DTPOFF32
},
1846 {BFD_RELOC_ARM_TLS_TPOFF32
, R_ARM_TLS_TPOFF32
},
1847 {BFD_RELOC_ARM_TLS_IE32
, R_ARM_TLS_IE32
},
1848 {BFD_RELOC_ARM_TLS_LE32
, R_ARM_TLS_LE32
},
1849 {BFD_RELOC_ARM_IRELATIVE
, R_ARM_IRELATIVE
},
1850 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
1851 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
},
1852 {BFD_RELOC_ARM_MOVW
, R_ARM_MOVW_ABS_NC
},
1853 {BFD_RELOC_ARM_MOVT
, R_ARM_MOVT_ABS
},
1854 {BFD_RELOC_ARM_MOVW_PCREL
, R_ARM_MOVW_PREL_NC
},
1855 {BFD_RELOC_ARM_MOVT_PCREL
, R_ARM_MOVT_PREL
},
1856 {BFD_RELOC_ARM_THUMB_MOVW
, R_ARM_THM_MOVW_ABS_NC
},
1857 {BFD_RELOC_ARM_THUMB_MOVT
, R_ARM_THM_MOVT_ABS
},
1858 {BFD_RELOC_ARM_THUMB_MOVW_PCREL
, R_ARM_THM_MOVW_PREL_NC
},
1859 {BFD_RELOC_ARM_THUMB_MOVT_PCREL
, R_ARM_THM_MOVT_PREL
},
1860 {BFD_RELOC_ARM_ALU_PC_G0_NC
, R_ARM_ALU_PC_G0_NC
},
1861 {BFD_RELOC_ARM_ALU_PC_G0
, R_ARM_ALU_PC_G0
},
1862 {BFD_RELOC_ARM_ALU_PC_G1_NC
, R_ARM_ALU_PC_G1_NC
},
1863 {BFD_RELOC_ARM_ALU_PC_G1
, R_ARM_ALU_PC_G1
},
1864 {BFD_RELOC_ARM_ALU_PC_G2
, R_ARM_ALU_PC_G2
},
1865 {BFD_RELOC_ARM_LDR_PC_G0
, R_ARM_LDR_PC_G0
},
1866 {BFD_RELOC_ARM_LDR_PC_G1
, R_ARM_LDR_PC_G1
},
1867 {BFD_RELOC_ARM_LDR_PC_G2
, R_ARM_LDR_PC_G2
},
1868 {BFD_RELOC_ARM_LDRS_PC_G0
, R_ARM_LDRS_PC_G0
},
1869 {BFD_RELOC_ARM_LDRS_PC_G1
, R_ARM_LDRS_PC_G1
},
1870 {BFD_RELOC_ARM_LDRS_PC_G2
, R_ARM_LDRS_PC_G2
},
1871 {BFD_RELOC_ARM_LDC_PC_G0
, R_ARM_LDC_PC_G0
},
1872 {BFD_RELOC_ARM_LDC_PC_G1
, R_ARM_LDC_PC_G1
},
1873 {BFD_RELOC_ARM_LDC_PC_G2
, R_ARM_LDC_PC_G2
},
1874 {BFD_RELOC_ARM_ALU_SB_G0_NC
, R_ARM_ALU_SB_G0_NC
},
1875 {BFD_RELOC_ARM_ALU_SB_G0
, R_ARM_ALU_SB_G0
},
1876 {BFD_RELOC_ARM_ALU_SB_G1_NC
, R_ARM_ALU_SB_G1_NC
},
1877 {BFD_RELOC_ARM_ALU_SB_G1
, R_ARM_ALU_SB_G1
},
1878 {BFD_RELOC_ARM_ALU_SB_G2
, R_ARM_ALU_SB_G2
},
1879 {BFD_RELOC_ARM_LDR_SB_G0
, R_ARM_LDR_SB_G0
},
1880 {BFD_RELOC_ARM_LDR_SB_G1
, R_ARM_LDR_SB_G1
},
1881 {BFD_RELOC_ARM_LDR_SB_G2
, R_ARM_LDR_SB_G2
},
1882 {BFD_RELOC_ARM_LDRS_SB_G0
, R_ARM_LDRS_SB_G0
},
1883 {BFD_RELOC_ARM_LDRS_SB_G1
, R_ARM_LDRS_SB_G1
},
1884 {BFD_RELOC_ARM_LDRS_SB_G2
, R_ARM_LDRS_SB_G2
},
1885 {BFD_RELOC_ARM_LDC_SB_G0
, R_ARM_LDC_SB_G0
},
1886 {BFD_RELOC_ARM_LDC_SB_G1
, R_ARM_LDC_SB_G1
},
1887 {BFD_RELOC_ARM_LDC_SB_G2
, R_ARM_LDC_SB_G2
},
1888 {BFD_RELOC_ARM_V4BX
, R_ARM_V4BX
}
1891 static reloc_howto_type
*
1892 elf32_arm_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1893 bfd_reloc_code_real_type code
)
1897 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_reloc_map
); i
++)
1898 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
1899 return elf32_arm_howto_from_type (elf32_arm_reloc_map
[i
].elf_reloc_val
);
1904 static reloc_howto_type
*
1905 elf32_arm_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1910 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_1
); i
++)
1911 if (elf32_arm_howto_table_1
[i
].name
!= NULL
1912 && strcasecmp (elf32_arm_howto_table_1
[i
].name
, r_name
) == 0)
1913 return &elf32_arm_howto_table_1
[i
];
1915 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_2
); i
++)
1916 if (elf32_arm_howto_table_2
[i
].name
!= NULL
1917 && strcasecmp (elf32_arm_howto_table_2
[i
].name
, r_name
) == 0)
1918 return &elf32_arm_howto_table_2
[i
];
1920 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_3
); i
++)
1921 if (elf32_arm_howto_table_3
[i
].name
!= NULL
1922 && strcasecmp (elf32_arm_howto_table_3
[i
].name
, r_name
) == 0)
1923 return &elf32_arm_howto_table_3
[i
];
1928 /* Support for core dump NOTE sections. */
1931 elf32_arm_nabi_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1936 switch (note
->descsz
)
1941 case 148: /* Linux/ARM 32-bit. */
1943 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
1946 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
1955 /* Make a ".reg/999" section. */
1956 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
1957 size
, note
->descpos
+ offset
);
1961 elf32_arm_nabi_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
1963 switch (note
->descsz
)
1968 case 124: /* Linux/ARM elf_prpsinfo. */
1969 elf_tdata (abfd
)->core_program
1970 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
1971 elf_tdata (abfd
)->core_command
1972 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
1975 /* Note that for some reason, a spurious space is tacked
1976 onto the end of the args in some (at least one anyway)
1977 implementations, so strip it off if it exists. */
1979 char *command
= elf_tdata (abfd
)->core_command
;
1980 int n
= strlen (command
);
1982 if (0 < n
&& command
[n
- 1] == ' ')
1983 command
[n
- 1] = '\0';
1989 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1990 #define TARGET_LITTLE_NAME "elf32-littlearm"
1991 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1992 #define TARGET_BIG_NAME "elf32-bigarm"
1994 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1995 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1997 typedef unsigned long int insn32
;
1998 typedef unsigned short int insn16
;
2000 /* In lieu of proper flags, assume all EABIv4 or later objects are
2002 #define INTERWORK_FLAG(abfd) \
2003 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
2004 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2005 || ((abfd)->flags & BFD_LINKER_CREATED))
2007 /* The linker script knows the section names for placement.
2008 The entry_names are used to do simple name mangling on the stubs.
2009 Given a function name, and its type, the stub can be found. The
2010 name can be changed. The only requirement is the %s be present. */
2011 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2012 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2014 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2015 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2017 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2018 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2020 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2021 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2023 #define STUB_ENTRY_NAME "__%s_veneer"
2025 /* The name of the dynamic interpreter. This is put in the .interp
2027 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2029 static const unsigned long tls_trampoline
[] =
2031 0xe08e0000, /* add r0, lr, r0 */
2032 0xe5901004, /* ldr r1, [r0,#4] */
2033 0xe12fff11, /* bx r1 */
2036 static const unsigned long dl_tlsdesc_lazy_trampoline
[] =
2038 0xe52d2004, /* push {r2} */
2039 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2040 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2041 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2042 0xe081100f, /* 2: add r1, pc */
2043 0xe12fff12, /* bx r2 */
2044 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2045 + dl_tlsdesc_lazy_resolver(GOT) */
2046 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2049 #ifdef FOUR_WORD_PLT
2051 /* The first entry in a procedure linkage table looks like
2052 this. It is set up so that any shared library function that is
2053 called before the relocation has been set up calls the dynamic
2055 static const bfd_vma elf32_arm_plt0_entry
[] =
2057 0xe52de004, /* str lr, [sp, #-4]! */
2058 0xe59fe010, /* ldr lr, [pc, #16] */
2059 0xe08fe00e, /* add lr, pc, lr */
2060 0xe5bef008, /* ldr pc, [lr, #8]! */
2063 /* Subsequent entries in a procedure linkage table look like
2065 static const bfd_vma elf32_arm_plt_entry
[] =
2067 0xe28fc600, /* add ip, pc, #NN */
2068 0xe28cca00, /* add ip, ip, #NN */
2069 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2070 0x00000000, /* unused */
2075 /* The first entry in a procedure linkage table looks like
2076 this. It is set up so that any shared library function that is
2077 called before the relocation has been set up calls the dynamic
2079 static const bfd_vma elf32_arm_plt0_entry
[] =
2081 0xe52de004, /* str lr, [sp, #-4]! */
2082 0xe59fe004, /* ldr lr, [pc, #4] */
2083 0xe08fe00e, /* add lr, pc, lr */
2084 0xe5bef008, /* ldr pc, [lr, #8]! */
2085 0x00000000, /* &GOT[0] - . */
2088 /* Subsequent entries in a procedure linkage table look like
2090 static const bfd_vma elf32_arm_plt_entry
[] =
2092 0xe28fc600, /* add ip, pc, #0xNN00000 */
2093 0xe28cca00, /* add ip, ip, #0xNN000 */
2094 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2099 /* The format of the first entry in the procedure linkage table
2100 for a VxWorks executable. */
2101 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry
[] =
2103 0xe52dc008, /* str ip,[sp,#-8]! */
2104 0xe59fc000, /* ldr ip,[pc] */
2105 0xe59cf008, /* ldr pc,[ip,#8] */
2106 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2109 /* The format of subsequent entries in a VxWorks executable. */
2110 static const bfd_vma elf32_arm_vxworks_exec_plt_entry
[] =
2112 0xe59fc000, /* ldr ip,[pc] */
2113 0xe59cf000, /* ldr pc,[ip] */
2114 0x00000000, /* .long @got */
2115 0xe59fc000, /* ldr ip,[pc] */
2116 0xea000000, /* b _PLT */
2117 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2120 /* The format of entries in a VxWorks shared library. */
2121 static const bfd_vma elf32_arm_vxworks_shared_plt_entry
[] =
2123 0xe59fc000, /* ldr ip,[pc] */
2124 0xe79cf009, /* ldr pc,[ip,r9] */
2125 0x00000000, /* .long @got */
2126 0xe59fc000, /* ldr ip,[pc] */
2127 0xe599f008, /* ldr pc,[r9,#8] */
2128 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2131 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2132 #define PLT_THUMB_STUB_SIZE 4
2133 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
2139 /* The entries in a PLT when using a DLL-based target with multiple
2141 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
2143 0xe51ff004, /* ldr pc, [pc, #-4] */
2144 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2147 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2148 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2149 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2150 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2151 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2152 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2162 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2163 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2164 is inserted in arm_build_one_stub(). */
2165 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2166 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2167 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2168 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2169 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2170 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2175 enum stub_insn_type type
;
2176 unsigned int r_type
;
2180 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2181 to reach the stub if necessary. */
2182 static const insn_sequence elf32_arm_stub_long_branch_any_any
[] =
2184 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2185 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2188 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2190 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb
[] =
2192 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2193 ARM_INSN(0xe12fff1c), /* bx ip */
2194 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2197 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2198 static const insn_sequence elf32_arm_stub_long_branch_thumb_only
[] =
2200 THUMB16_INSN(0xb401), /* push {r0} */
2201 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2202 THUMB16_INSN(0x4684), /* mov ip, r0 */
2203 THUMB16_INSN(0xbc01), /* pop {r0} */
2204 THUMB16_INSN(0x4760), /* bx ip */
2205 THUMB16_INSN(0xbf00), /* nop */
2206 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2209 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2211 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb
[] =
2213 THUMB16_INSN(0x4778), /* bx pc */
2214 THUMB16_INSN(0x46c0), /* nop */
2215 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2216 ARM_INSN(0xe12fff1c), /* bx ip */
2217 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2220 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2222 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm
[] =
2224 THUMB16_INSN(0x4778), /* bx pc */
2225 THUMB16_INSN(0x46c0), /* nop */
2226 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2227 DATA_WORD(0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2230 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2231 one, when the destination is close enough. */
2232 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm
[] =
2234 THUMB16_INSN(0x4778), /* bx pc */
2235 THUMB16_INSN(0x46c0), /* nop */
2236 ARM_REL_INSN(0xea000000, -8), /* b (X-8) */
2239 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2240 blx to reach the stub if necessary. */
2241 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic
[] =
2243 ARM_INSN(0xe59fc000), /* ldr ip, [pc] */
2244 ARM_INSN(0xe08ff00c), /* add pc, pc, ip */
2245 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2248 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2249 blx to reach the stub if necessary. We can not add into pc;
2250 it is not guaranteed to mode switch (different in ARMv6 and
2252 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic
[] =
2254 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2255 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2256 ARM_INSN(0xe12fff1c), /* bx ip */
2257 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2260 /* V4T ARM -> ARM long branch stub, PIC. */
2261 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic
[] =
2263 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2264 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2265 ARM_INSN(0xe12fff1c), /* bx ip */
2266 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2269 /* V4T Thumb -> ARM long branch stub, PIC. */
2270 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic
[] =
2272 THUMB16_INSN(0x4778), /* bx pc */
2273 THUMB16_INSN(0x46c0), /* nop */
2274 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2275 ARM_INSN(0xe08cf00f), /* add pc, ip, pc */
2276 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2279 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2281 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic
[] =
2283 THUMB16_INSN(0xb401), /* push {r0} */
2284 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2285 THUMB16_INSN(0x46fc), /* mov ip, pc */
2286 THUMB16_INSN(0x4484), /* add ip, r0 */
2287 THUMB16_INSN(0xbc01), /* pop {r0} */
2288 THUMB16_INSN(0x4760), /* bx ip */
2289 DATA_WORD(0, R_ARM_REL32
, 4), /* dcd R_ARM_REL32(X) */
2292 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2294 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic
[] =
2296 THUMB16_INSN(0x4778), /* bx pc */
2297 THUMB16_INSN(0x46c0), /* nop */
2298 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2299 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2300 ARM_INSN(0xe12fff1c), /* bx ip */
2301 DATA_WORD(0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2304 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2305 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2306 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic
[] =
2308 ARM_INSN(0xe59f1000), /* ldr r1, [pc] */
2309 ARM_INSN(0xe08ff001), /* add pc, pc, r1 */
2310 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2313 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2314 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2315 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic
[] =
2317 THUMB16_INSN(0x4778), /* bx pc */
2318 THUMB16_INSN(0x46c0), /* nop */
2319 ARM_INSN(0xe59f1000), /* ldr r1, [pc, #0] */
2320 ARM_INSN(0xe081f00f), /* add pc, r1, pc */
2321 DATA_WORD(0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2324 /* Cortex-A8 erratum-workaround stubs. */
2326 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2327 can't use a conditional branch to reach this stub). */
2329 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond
[] =
2331 THUMB16_BCOND_INSN(0xd001), /* b<cond>.n true. */
2332 THUMB32_B_INSN(0xf000b800, -4), /* b.w insn_after_original_branch. */
2333 THUMB32_B_INSN(0xf000b800, -4) /* true: b.w original_branch_dest. */
2336 /* Stub used for b.w and bl.w instructions. */
2338 static const insn_sequence elf32_arm_stub_a8_veneer_b
[] =
2340 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2343 static const insn_sequence elf32_arm_stub_a8_veneer_bl
[] =
2345 THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */
2348 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2349 instruction (which switches to ARM mode) to point to this stub. Jump to the
2350 real destination using an ARM-mode branch. */
2352 static const insn_sequence elf32_arm_stub_a8_veneer_blx
[] =
2354 ARM_REL_INSN(0xea000000, -8) /* b original_branch_dest. */
2357 /* Section name for stubs is the associated section name plus this
2359 #define STUB_SUFFIX ".stub"
2361 /* One entry per long/short branch stub defined above. */
2363 DEF_STUB(long_branch_any_any) \
2364 DEF_STUB(long_branch_v4t_arm_thumb) \
2365 DEF_STUB(long_branch_thumb_only) \
2366 DEF_STUB(long_branch_v4t_thumb_thumb) \
2367 DEF_STUB(long_branch_v4t_thumb_arm) \
2368 DEF_STUB(short_branch_v4t_thumb_arm) \
2369 DEF_STUB(long_branch_any_arm_pic) \
2370 DEF_STUB(long_branch_any_thumb_pic) \
2371 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2372 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2373 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2374 DEF_STUB(long_branch_thumb_only_pic) \
2375 DEF_STUB(long_branch_any_tls_pic) \
2376 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2377 DEF_STUB(a8_veneer_b_cond) \
2378 DEF_STUB(a8_veneer_b) \
2379 DEF_STUB(a8_veneer_bl) \
2380 DEF_STUB(a8_veneer_blx)
2382 #define DEF_STUB(x) arm_stub_##x,
2383 enum elf32_arm_stub_type
{
2386 /* Note the first a8_veneer type */
2387 arm_stub_a8_veneer_lwm
= arm_stub_a8_veneer_b_cond
2393 const insn_sequence
* template_sequence
;
2397 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2398 static const stub_def stub_definitions
[] = {
2403 struct elf32_arm_stub_hash_entry
2405 /* Base hash table entry structure. */
2406 struct bfd_hash_entry root
;
2408 /* The stub section. */
2411 /* Offset within stub_sec of the beginning of this stub. */
2412 bfd_vma stub_offset
;
2414 /* Given the symbol's value and its section we can determine its final
2415 value when building the stubs (so the stub knows where to jump). */
2416 bfd_vma target_value
;
2417 asection
*target_section
;
2419 /* Offset to apply to relocation referencing target_value. */
2420 bfd_vma target_addend
;
2422 /* The instruction which caused this stub to be generated (only valid for
2423 Cortex-A8 erratum workaround stubs at present). */
2424 unsigned long orig_insn
;
2426 /* The stub type. */
2427 enum elf32_arm_stub_type stub_type
;
2428 /* Its encoding size in bytes. */
2431 const insn_sequence
*stub_template
;
2432 /* The size of the template (number of entries). */
2433 int stub_template_size
;
2435 /* The symbol table entry, if any, that this was derived from. */
2436 struct elf32_arm_link_hash_entry
*h
;
2438 /* Type of branch. */
2439 enum arm_st_branch_type branch_type
;
2441 /* Where this stub is being called from, or, in the case of combined
2442 stub sections, the first input section in the group. */
2445 /* The name for the local symbol at the start of this stub. The
2446 stub name in the hash table has to be unique; this does not, so
2447 it can be friendlier. */
2451 /* Used to build a map of a section. This is required for mixed-endian
2454 typedef struct elf32_elf_section_map
2459 elf32_arm_section_map
;
2461 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2465 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
,
2466 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
,
2467 VFP11_ERRATUM_ARM_VENEER
,
2468 VFP11_ERRATUM_THUMB_VENEER
2470 elf32_vfp11_erratum_type
;
2472 typedef struct elf32_vfp11_erratum_list
2474 struct elf32_vfp11_erratum_list
*next
;
2480 struct elf32_vfp11_erratum_list
*veneer
;
2481 unsigned int vfp_insn
;
2485 struct elf32_vfp11_erratum_list
*branch
;
2489 elf32_vfp11_erratum_type type
;
2491 elf32_vfp11_erratum_list
;
2496 INSERT_EXIDX_CANTUNWIND_AT_END
2498 arm_unwind_edit_type
;
2500 /* A (sorted) list of edits to apply to an unwind table. */
2501 typedef struct arm_unwind_table_edit
2503 arm_unwind_edit_type type
;
2504 /* Note: we sometimes want to insert an unwind entry corresponding to a
2505 section different from the one we're currently writing out, so record the
2506 (text) section this edit relates to here. */
2507 asection
*linked_section
;
2509 struct arm_unwind_table_edit
*next
;
2511 arm_unwind_table_edit
;
2513 typedef struct _arm_elf_section_data
2515 /* Information about mapping symbols. */
2516 struct bfd_elf_section_data elf
;
2517 unsigned int mapcount
;
2518 unsigned int mapsize
;
2519 elf32_arm_section_map
*map
;
2520 /* Information about CPU errata. */
2521 unsigned int erratumcount
;
2522 elf32_vfp11_erratum_list
*erratumlist
;
2523 /* Information about unwind tables. */
2526 /* Unwind info attached to a text section. */
2529 asection
*arm_exidx_sec
;
2532 /* Unwind info attached to an .ARM.exidx section. */
2535 arm_unwind_table_edit
*unwind_edit_list
;
2536 arm_unwind_table_edit
*unwind_edit_tail
;
2540 _arm_elf_section_data
;
2542 #define elf32_arm_section_data(sec) \
2543 ((_arm_elf_section_data *) elf_section_data (sec))
2545 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2546 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2547 so may be created multiple times: we use an array of these entries whilst
2548 relaxing which we can refresh easily, then create stubs for each potentially
2549 erratum-triggering instruction once we've settled on a solution. */
2551 struct a8_erratum_fix
{
2556 unsigned long orig_insn
;
2558 enum elf32_arm_stub_type stub_type
;
2559 enum arm_st_branch_type branch_type
;
2562 /* A table of relocs applied to branches which might trigger Cortex-A8
2565 struct a8_erratum_reloc
{
2567 bfd_vma destination
;
2568 struct elf32_arm_link_hash_entry
*hash
;
2569 const char *sym_name
;
2570 unsigned int r_type
;
2571 enum arm_st_branch_type branch_type
;
2572 bfd_boolean non_a8_stub
;
2575 /* The size of the thread control block. */
2578 /* ARM-specific information about a PLT entry, over and above the usual
2580 struct arm_plt_info
{
2581 /* We reference count Thumb references to a PLT entry separately,
2582 so that we can emit the Thumb trampoline only if needed. */
2583 bfd_signed_vma thumb_refcount
;
2585 /* Some references from Thumb code may be eliminated by BL->BLX
2586 conversion, so record them separately. */
2587 bfd_signed_vma maybe_thumb_refcount
;
2589 /* How many of the recorded PLT accesses were from non-call relocations.
2590 This information is useful when deciding whether anything takes the
2591 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2592 non-call references to the function should resolve directly to the
2593 real runtime target. */
2594 unsigned int noncall_refcount
;
2596 /* Since PLT entries have variable size if the Thumb prologue is
2597 used, we need to record the index into .got.plt instead of
2598 recomputing it from the PLT offset. */
2599 bfd_signed_vma got_offset
;
2602 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2603 struct arm_local_iplt_info
{
2604 /* The information that is usually found in the generic ELF part of
2605 the hash table entry. */
2606 union gotplt_union root
;
2608 /* The information that is usually found in the ARM-specific part of
2609 the hash table entry. */
2610 struct arm_plt_info arm
;
2612 /* A list of all potential dynamic relocations against this symbol. */
2613 struct elf_dyn_relocs
*dyn_relocs
;
2616 struct elf_arm_obj_tdata
2618 struct elf_obj_tdata root
;
2620 /* tls_type for each local got entry. */
2621 char *local_got_tls_type
;
2623 /* GOTPLT entries for TLS descriptors. */
2624 bfd_vma
*local_tlsdesc_gotent
;
2626 /* Information for local symbols that need entries in .iplt. */
2627 struct arm_local_iplt_info
**local_iplt
;
2629 /* Zero to warn when linking objects with incompatible enum sizes. */
2630 int no_enum_size_warning
;
2632 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2633 int no_wchar_size_warning
;
2636 #define elf_arm_tdata(bfd) \
2637 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2639 #define elf32_arm_local_got_tls_type(bfd) \
2640 (elf_arm_tdata (bfd)->local_got_tls_type)
2642 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2643 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2645 #define elf32_arm_local_iplt(bfd) \
2646 (elf_arm_tdata (bfd)->local_iplt)
2648 #define is_arm_elf(bfd) \
2649 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2650 && elf_tdata (bfd) != NULL \
2651 && elf_object_id (bfd) == ARM_ELF_DATA)
2654 elf32_arm_mkobject (bfd
*abfd
)
2656 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2660 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2662 /* Arm ELF linker hash entry. */
2663 struct elf32_arm_link_hash_entry
2665 struct elf_link_hash_entry root
;
2667 /* Track dynamic relocs copied for this symbol. */
2668 struct elf_dyn_relocs
*dyn_relocs
;
2670 /* ARM-specific PLT information. */
2671 struct arm_plt_info plt
;
2673 #define GOT_UNKNOWN 0
2674 #define GOT_NORMAL 1
2675 #define GOT_TLS_GD 2
2676 #define GOT_TLS_IE 4
2677 #define GOT_TLS_GDESC 8
2678 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
2679 unsigned int tls_type
: 8;
2681 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
2682 unsigned int is_iplt
: 1;
2684 unsigned int unused
: 23;
2686 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
2687 starting at the end of the jump table. */
2688 bfd_vma tlsdesc_got
;
2690 /* The symbol marking the real symbol location for exported thumb
2691 symbols with Arm stubs. */
2692 struct elf_link_hash_entry
*export_glue
;
2694 /* A pointer to the most recently used stub hash entry against this
2696 struct elf32_arm_stub_hash_entry
*stub_cache
;
2699 /* Traverse an arm ELF linker hash table. */
2700 #define elf32_arm_link_hash_traverse(table, func, info) \
2701 (elf_link_hash_traverse \
2703 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2706 /* Get the ARM elf linker hash table from a link_info structure. */
2707 #define elf32_arm_hash_table(info) \
2708 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2709 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2711 #define arm_stub_hash_lookup(table, string, create, copy) \
2712 ((struct elf32_arm_stub_hash_entry *) \
2713 bfd_hash_lookup ((table), (string), (create), (copy)))
2715 /* Array to keep track of which stub sections have been created, and
2716 information on stub grouping. */
2719 /* This is the section to which stubs in the group will be
2722 /* The stub section. */
2726 #define elf32_arm_compute_jump_table_size(htab) \
2727 ((htab)->next_tls_desc_index * 4)
2729 /* ARM ELF linker hash table. */
2730 struct elf32_arm_link_hash_table
2732 /* The main hash table. */
2733 struct elf_link_hash_table root
;
2735 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2736 bfd_size_type thumb_glue_size
;
2738 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2739 bfd_size_type arm_glue_size
;
2741 /* The size in bytes of section containing the ARMv4 BX veneers. */
2742 bfd_size_type bx_glue_size
;
2744 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2745 veneer has been populated. */
2746 bfd_vma bx_glue_offset
[15];
2748 /* The size in bytes of the section containing glue for VFP11 erratum
2750 bfd_size_type vfp11_erratum_glue_size
;
2752 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2753 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2754 elf32_arm_write_section(). */
2755 struct a8_erratum_fix
*a8_erratum_fixes
;
2756 unsigned int num_a8_erratum_fixes
;
2758 /* An arbitrary input BFD chosen to hold the glue sections. */
2759 bfd
* bfd_of_glue_owner
;
2761 /* Nonzero to output a BE8 image. */
2764 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2765 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2768 /* The relocation to use for R_ARM_TARGET2 relocations. */
2771 /* 0 = Ignore R_ARM_V4BX.
2772 1 = Convert BX to MOV PC.
2773 2 = Generate v4 interworing stubs. */
2776 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2779 /* Whether we should fix the ARM1176 BLX immediate issue. */
2782 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2785 /* What sort of code sequences we should look for which may trigger the
2786 VFP11 denorm erratum. */
2787 bfd_arm_vfp11_fix vfp11_fix
;
2789 /* Global counter for the number of fixes we have emitted. */
2790 int num_vfp11_fixes
;
2792 /* Nonzero to force PIC branch veneers. */
2795 /* The number of bytes in the initial entry in the PLT. */
2796 bfd_size_type plt_header_size
;
2798 /* The number of bytes in the subsequent PLT etries. */
2799 bfd_size_type plt_entry_size
;
2801 /* True if the target system is VxWorks. */
2804 /* True if the target system is Symbian OS. */
2807 /* True if the target uses REL relocations. */
2810 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
2811 bfd_vma next_tls_desc_index
;
2813 /* How many R_ARM_TLS_DESC relocations were generated so far. */
2814 bfd_vma num_tls_desc
;
2816 /* Short-cuts to get to dynamic linker sections. */
2820 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2823 /* The offset into splt of the PLT entry for the TLS descriptor
2824 resolver. Special values are 0, if not necessary (or not found
2825 to be necessary yet), and -1 if needed but not determined
2827 bfd_vma dt_tlsdesc_plt
;
2829 /* The offset into sgot of the GOT entry used by the PLT entry
2831 bfd_vma dt_tlsdesc_got
;
2833 /* Offset in .plt section of tls_arm_trampoline. */
2834 bfd_vma tls_trampoline
;
2836 /* Data for R_ARM_TLS_LDM32 relocations. */
2839 bfd_signed_vma refcount
;
2843 /* Small local sym cache. */
2844 struct sym_cache sym_cache
;
2846 /* For convenience in allocate_dynrelocs. */
2849 /* The amount of space used by the reserved portion of the sgotplt
2850 section, plus whatever space is used by the jump slots. */
2851 bfd_vma sgotplt_jump_table_size
;
2853 /* The stub hash table. */
2854 struct bfd_hash_table stub_hash_table
;
2856 /* Linker stub bfd. */
2859 /* Linker call-backs. */
2860 asection
* (*add_stub_section
) (const char *, asection
*);
2861 void (*layout_sections_again
) (void);
2863 /* Array to keep track of which stub sections have been created, and
2864 information on stub grouping. */
2865 struct map_stub
*stub_group
;
2867 /* Number of elements in stub_group. */
2870 /* Assorted information used by elf32_arm_size_stubs. */
2871 unsigned int bfd_count
;
2873 asection
**input_list
;
2876 /* Create an entry in an ARM ELF linker hash table. */
2878 static struct bfd_hash_entry
*
2879 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
2880 struct bfd_hash_table
* table
,
2881 const char * string
)
2883 struct elf32_arm_link_hash_entry
* ret
=
2884 (struct elf32_arm_link_hash_entry
*) entry
;
2886 /* Allocate the structure if it has not already been allocated by a
2889 ret
= (struct elf32_arm_link_hash_entry
*)
2890 bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
2892 return (struct bfd_hash_entry
*) ret
;
2894 /* Call the allocation method of the superclass. */
2895 ret
= ((struct elf32_arm_link_hash_entry
*)
2896 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2900 ret
->dyn_relocs
= NULL
;
2901 ret
->tls_type
= GOT_UNKNOWN
;
2902 ret
->tlsdesc_got
= (bfd_vma
) -1;
2903 ret
->plt
.thumb_refcount
= 0;
2904 ret
->plt
.maybe_thumb_refcount
= 0;
2905 ret
->plt
.noncall_refcount
= 0;
2906 ret
->plt
.got_offset
= -1;
2907 ret
->is_iplt
= FALSE
;
2908 ret
->export_glue
= NULL
;
2910 ret
->stub_cache
= NULL
;
2913 return (struct bfd_hash_entry
*) ret
;
2916 /* Ensure that we have allocated bookkeeping structures for ABFD's local
2920 elf32_arm_allocate_local_sym_info (bfd
*abfd
)
2922 if (elf_local_got_refcounts (abfd
) == NULL
)
2924 bfd_size_type num_syms
;
2928 num_syms
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
2929 size
= num_syms
* (sizeof (bfd_signed_vma
)
2930 + sizeof (struct arm_local_iplt_info
*)
2933 data
= bfd_zalloc (abfd
, size
);
2937 elf_local_got_refcounts (abfd
) = (bfd_signed_vma
*) data
;
2938 data
+= num_syms
* sizeof (bfd_signed_vma
);
2940 elf32_arm_local_iplt (abfd
) = (struct arm_local_iplt_info
**) data
;
2941 data
+= num_syms
* sizeof (struct arm_local_iplt_info
*);
2943 elf32_arm_local_tlsdesc_gotent (abfd
) = (bfd_vma
*) data
;
2944 data
+= num_syms
* sizeof (bfd_vma
);
2946 elf32_arm_local_got_tls_type (abfd
) = data
;
2951 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
2952 to input bfd ABFD. Create the information if it doesn't already exist.
2953 Return null if an allocation fails. */
2955 static struct arm_local_iplt_info
*
2956 elf32_arm_create_local_iplt (bfd
*abfd
, unsigned long r_symndx
)
2958 struct arm_local_iplt_info
**ptr
;
2960 if (!elf32_arm_allocate_local_sym_info (abfd
))
2963 BFD_ASSERT (r_symndx
< elf_tdata (abfd
)->symtab_hdr
.sh_info
);
2964 ptr
= &elf32_arm_local_iplt (abfd
)[r_symndx
];
2966 *ptr
= bfd_zalloc (abfd
, sizeof (**ptr
));
2970 /* Try to obtain PLT information for the symbol with index R_SYMNDX
2971 in ABFD's symbol table. If the symbol is global, H points to its
2972 hash table entry, otherwise H is null.
2974 Return true if the symbol does have PLT information. When returning
2975 true, point *ROOT_PLT at the target-independent reference count/offset
2976 union and *ARM_PLT at the ARM-specific information. */
2979 elf32_arm_get_plt_info (bfd
*abfd
, struct elf32_arm_link_hash_entry
*h
,
2980 unsigned long r_symndx
, union gotplt_union
**root_plt
,
2981 struct arm_plt_info
**arm_plt
)
2983 struct arm_local_iplt_info
*local_iplt
;
2987 *root_plt
= &h
->root
.plt
;
2992 if (elf32_arm_local_iplt (abfd
) == NULL
)
2995 local_iplt
= elf32_arm_local_iplt (abfd
)[r_symndx
];
2996 if (local_iplt
== NULL
)
2999 *root_plt
= &local_iplt
->root
;
3000 *arm_plt
= &local_iplt
->arm
;
3004 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3008 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info
*info
,
3009 struct arm_plt_info
*arm_plt
)
3011 struct elf32_arm_link_hash_table
*htab
;
3013 htab
= elf32_arm_hash_table (info
);
3014 return (arm_plt
->thumb_refcount
!= 0
3015 || (!htab
->use_blx
&& arm_plt
->maybe_thumb_refcount
!= 0));
3018 /* Return a pointer to the head of the dynamic reloc list that should
3019 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3020 ABFD's symbol table. Return null if an error occurs. */
3022 static struct elf_dyn_relocs
**
3023 elf32_arm_get_local_dynreloc_list (bfd
*abfd
, unsigned long r_symndx
,
3024 Elf_Internal_Sym
*isym
)
3026 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3028 struct arm_local_iplt_info
*local_iplt
;
3030 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
3031 if (local_iplt
== NULL
)
3033 return &local_iplt
->dyn_relocs
;
3037 /* Track dynamic relocs needed for local syms too.
3038 We really need local syms available to do this
3043 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3047 vpp
= &elf_section_data (s
)->local_dynrel
;
3048 return (struct elf_dyn_relocs
**) vpp
;
3052 /* Initialize an entry in the stub hash table. */
3054 static struct bfd_hash_entry
*
3055 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
3056 struct bfd_hash_table
*table
,
3059 /* Allocate the structure if it has not already been allocated by a
3063 entry
= (struct bfd_hash_entry
*)
3064 bfd_hash_allocate (table
, sizeof (struct elf32_arm_stub_hash_entry
));
3069 /* Call the allocation method of the superclass. */
3070 entry
= bfd_hash_newfunc (entry
, table
, string
);
3073 struct elf32_arm_stub_hash_entry
*eh
;
3075 /* Initialize the local fields. */
3076 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
3077 eh
->stub_sec
= NULL
;
3078 eh
->stub_offset
= 0;
3079 eh
->target_value
= 0;
3080 eh
->target_section
= NULL
;
3081 eh
->target_addend
= 0;
3083 eh
->stub_type
= arm_stub_none
;
3085 eh
->stub_template
= NULL
;
3086 eh
->stub_template_size
= 0;
3089 eh
->output_name
= NULL
;
3095 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3096 shortcuts to them in our hash table. */
3099 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
3101 struct elf32_arm_link_hash_table
*htab
;
3103 htab
= elf32_arm_hash_table (info
);
3107 /* BPABI objects never have a GOT, or associated sections. */
3108 if (htab
->symbian_p
)
3111 if (! _bfd_elf_create_got_section (dynobj
, info
))
3117 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3120 create_ifunc_sections (struct bfd_link_info
*info
)
3122 struct elf32_arm_link_hash_table
*htab
;
3123 const struct elf_backend_data
*bed
;
3128 htab
= elf32_arm_hash_table (info
);
3129 dynobj
= htab
->root
.dynobj
;
3130 bed
= get_elf_backend_data (dynobj
);
3131 flags
= bed
->dynamic_sec_flags
;
3133 if (htab
->root
.iplt
== NULL
)
3135 s
= bfd_make_section_with_flags (dynobj
, ".iplt",
3136 flags
| SEC_READONLY
| SEC_CODE
);
3138 || !bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3140 htab
->root
.iplt
= s
;
3143 if (htab
->root
.irelplt
== NULL
)
3145 s
= bfd_make_section_with_flags (dynobj
, RELOC_SECTION (htab
, ".iplt"),
3146 flags
| SEC_READONLY
);
3148 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3150 htab
->root
.irelplt
= s
;
3153 if (htab
->root
.igotplt
== NULL
)
3155 s
= bfd_make_section_with_flags (dynobj
, ".igot.plt", flags
);
3157 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3159 htab
->root
.igotplt
= s
;
3164 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3165 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3169 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
3171 struct elf32_arm_link_hash_table
*htab
;
3173 htab
= elf32_arm_hash_table (info
);
3177 if (!htab
->root
.sgot
&& !create_got_section (dynobj
, info
))
3180 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
3183 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
3185 htab
->srelbss
= bfd_get_section_by_name (dynobj
,
3186 RELOC_SECTION (htab
, ".bss"));
3188 if (htab
->vxworks_p
)
3190 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
3195 htab
->plt_header_size
= 0;
3196 htab
->plt_entry_size
3197 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
3201 htab
->plt_header_size
3202 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
3203 htab
->plt_entry_size
3204 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
3208 if (!htab
->root
.splt
3209 || !htab
->root
.srelplt
3211 || (!info
->shared
&& !htab
->srelbss
))
3217 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3220 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
3221 struct elf_link_hash_entry
*dir
,
3222 struct elf_link_hash_entry
*ind
)
3224 struct elf32_arm_link_hash_entry
*edir
, *eind
;
3226 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
3227 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
3229 if (eind
->dyn_relocs
!= NULL
)
3231 if (edir
->dyn_relocs
!= NULL
)
3233 struct elf_dyn_relocs
**pp
;
3234 struct elf_dyn_relocs
*p
;
3236 /* Add reloc counts against the indirect sym to the direct sym
3237 list. Merge any entries against the same section. */
3238 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
3240 struct elf_dyn_relocs
*q
;
3242 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
3243 if (q
->sec
== p
->sec
)
3245 q
->pc_count
+= p
->pc_count
;
3246 q
->count
+= p
->count
;
3253 *pp
= edir
->dyn_relocs
;
3256 edir
->dyn_relocs
= eind
->dyn_relocs
;
3257 eind
->dyn_relocs
= NULL
;
3260 if (ind
->root
.type
== bfd_link_hash_indirect
)
3262 /* Copy over PLT info. */
3263 edir
->plt
.thumb_refcount
+= eind
->plt
.thumb_refcount
;
3264 eind
->plt
.thumb_refcount
= 0;
3265 edir
->plt
.maybe_thumb_refcount
+= eind
->plt
.maybe_thumb_refcount
;
3266 eind
->plt
.maybe_thumb_refcount
= 0;
3267 edir
->plt
.noncall_refcount
+= eind
->plt
.noncall_refcount
;
3268 eind
->plt
.noncall_refcount
= 0;
3270 /* We should only allocate a function to .iplt once the final
3271 symbol information is known. */
3272 BFD_ASSERT (!eind
->is_iplt
);
3274 if (dir
->got
.refcount
<= 0)
3276 edir
->tls_type
= eind
->tls_type
;
3277 eind
->tls_type
= GOT_UNKNOWN
;
3281 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
3284 /* Create an ARM elf linker hash table. */
3286 static struct bfd_link_hash_table
*
3287 elf32_arm_link_hash_table_create (bfd
*abfd
)
3289 struct elf32_arm_link_hash_table
*ret
;
3290 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
3292 ret
= (struct elf32_arm_link_hash_table
*) bfd_malloc (amt
);
3296 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
3297 elf32_arm_link_hash_newfunc
,
3298 sizeof (struct elf32_arm_link_hash_entry
),
3305 ret
->sdynbss
= NULL
;
3306 ret
->srelbss
= NULL
;
3307 ret
->srelplt2
= NULL
;
3308 ret
->dt_tlsdesc_plt
= 0;
3309 ret
->dt_tlsdesc_got
= 0;
3310 ret
->tls_trampoline
= 0;
3311 ret
->next_tls_desc_index
= 0;
3312 ret
->num_tls_desc
= 0;
3313 ret
->thumb_glue_size
= 0;
3314 ret
->arm_glue_size
= 0;
3315 ret
->bx_glue_size
= 0;
3316 memset (ret
->bx_glue_offset
, 0, sizeof (ret
->bx_glue_offset
));
3317 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
3318 ret
->vfp11_erratum_glue_size
= 0;
3319 ret
->num_vfp11_fixes
= 0;
3320 ret
->fix_cortex_a8
= 0;
3321 ret
->fix_arm1176
= 0;
3322 ret
->bfd_of_glue_owner
= NULL
;
3323 ret
->byteswap_code
= 0;
3324 ret
->target1_is_rel
= 0;
3325 ret
->target2_reloc
= R_ARM_NONE
;
3326 #ifdef FOUR_WORD_PLT
3327 ret
->plt_header_size
= 16;
3328 ret
->plt_entry_size
= 16;
3330 ret
->plt_header_size
= 20;
3331 ret
->plt_entry_size
= 12;
3338 ret
->sym_cache
.abfd
= NULL
;
3340 ret
->tls_ldm_got
.refcount
= 0;
3341 ret
->stub_bfd
= NULL
;
3342 ret
->add_stub_section
= NULL
;
3343 ret
->layout_sections_again
= NULL
;
3344 ret
->stub_group
= NULL
;
3348 ret
->input_list
= NULL
;
3350 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
3351 sizeof (struct elf32_arm_stub_hash_entry
)))
3357 return &ret
->root
.root
;
3360 /* Free the derived linker hash table. */
3363 elf32_arm_hash_table_free (struct bfd_link_hash_table
*hash
)
3365 struct elf32_arm_link_hash_table
*ret
3366 = (struct elf32_arm_link_hash_table
*) hash
;
3368 bfd_hash_table_free (&ret
->stub_hash_table
);
3369 _bfd_generic_link_hash_table_free (hash
);
3372 /* Determine if we're dealing with a Thumb only architecture. */
3375 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
3377 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3381 if (arch
== TAG_CPU_ARCH_V6_M
|| arch
== TAG_CPU_ARCH_V6S_M
)
3384 if (arch
!= TAG_CPU_ARCH_V7
&& arch
!= TAG_CPU_ARCH_V7E_M
)
3387 profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3388 Tag_CPU_arch_profile
);
3390 return profile
== 'M';
3393 /* Determine if we're dealing with a Thumb-2 object. */
3396 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
3398 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3400 return arch
== TAG_CPU_ARCH_V6T2
|| arch
>= TAG_CPU_ARCH_V7
;
3403 /* Determine what kind of NOPs are available. */
3406 arch_has_arm_nop (struct elf32_arm_link_hash_table
*globals
)
3408 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3410 return arch
== TAG_CPU_ARCH_V6T2
3411 || arch
== TAG_CPU_ARCH_V6K
3412 || arch
== TAG_CPU_ARCH_V7
3413 || arch
== TAG_CPU_ARCH_V7E_M
;
3417 arch_has_thumb2_nop (struct elf32_arm_link_hash_table
*globals
)
3419 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3421 return (arch
== TAG_CPU_ARCH_V6T2
|| arch
== TAG_CPU_ARCH_V7
3422 || arch
== TAG_CPU_ARCH_V7E_M
);
3426 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
3430 case arm_stub_long_branch_thumb_only
:
3431 case arm_stub_long_branch_v4t_thumb_arm
:
3432 case arm_stub_short_branch_v4t_thumb_arm
:
3433 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3434 case arm_stub_long_branch_v4t_thumb_tls_pic
:
3435 case arm_stub_long_branch_thumb_only_pic
:
3446 /* Determine the type of stub needed, if any, for a call. */
3448 static enum elf32_arm_stub_type
3449 arm_type_of_stub (struct bfd_link_info
*info
,
3450 asection
*input_sec
,
3451 const Elf_Internal_Rela
*rel
,
3452 unsigned char st_type
,
3453 enum arm_st_branch_type
*actual_branch_type
,
3454 struct elf32_arm_link_hash_entry
*hash
,
3455 bfd_vma destination
,
3461 bfd_signed_vma branch_offset
;
3462 unsigned int r_type
;
3463 struct elf32_arm_link_hash_table
* globals
;
3466 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3468 enum arm_st_branch_type branch_type
= *actual_branch_type
;
3469 union gotplt_union
*root_plt
;
3470 struct arm_plt_info
*arm_plt
;
3472 if (branch_type
== ST_BRANCH_LONG
)
3475 globals
= elf32_arm_hash_table (info
);
3476 if (globals
== NULL
)
3479 thumb_only
= using_thumb_only (globals
);
3481 thumb2
= using_thumb2 (globals
);
3483 /* Determine where the call point is. */
3484 location
= (input_sec
->output_offset
3485 + input_sec
->output_section
->vma
3488 r_type
= ELF32_R_TYPE (rel
->r_info
);
3490 /* For TLS call relocs, it is the caller's responsibility to provide
3491 the address of the appropriate trampoline. */
3492 if (r_type
!= R_ARM_TLS_CALL
3493 && r_type
!= R_ARM_THM_TLS_CALL
3494 && elf32_arm_get_plt_info (input_bfd
, hash
, ELF32_R_SYM (rel
->r_info
),
3495 &root_plt
, &arm_plt
)
3496 && root_plt
->offset
!= (bfd_vma
) -1)
3500 if (hash
== NULL
|| hash
->is_iplt
)
3501 splt
= globals
->root
.iplt
;
3503 splt
= globals
->root
.splt
;
3508 /* Note when dealing with PLT entries: the main PLT stub is in
3509 ARM mode, so if the branch is in Thumb mode, another
3510 Thumb->ARM stub will be inserted later just before the ARM
3511 PLT stub. We don't take this extra distance into account
3512 here, because if a long branch stub is needed, we'll add a
3513 Thumb->Arm one and branch directly to the ARM PLT entry
3514 because it avoids spreading offset corrections in several
3517 destination
= (splt
->output_section
->vma
3518 + splt
->output_offset
3519 + root_plt
->offset
);
3521 branch_type
= ST_BRANCH_TO_ARM
;
3524 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3525 BFD_ASSERT (st_type
!= STT_GNU_IFUNC
);
3527 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3529 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
3530 || r_type
== R_ARM_THM_TLS_CALL
)
3532 /* Handle cases where:
3533 - this call goes too far (different Thumb/Thumb2 max
3535 - it's a Thumb->Arm call and blx is not available, or it's a
3536 Thumb->Arm branch (not bl). A stub is needed in this case,
3537 but only if this call is not through a PLT entry. Indeed,
3538 PLT stubs handle mode switching already.
3541 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3542 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3544 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3545 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3546 || (branch_type
== ST_BRANCH_TO_ARM
3547 && (((r_type
== R_ARM_THM_CALL
3548 || r_type
== R_ARM_THM_TLS_CALL
) && !globals
->use_blx
)
3549 || (r_type
== R_ARM_THM_JUMP24
))
3552 if (branch_type
== ST_BRANCH_TO_THUMB
)
3554 /* Thumb to thumb. */
3557 stub_type
= (info
->shared
| globals
->pic_veneer
)
3559 ? ((globals
->use_blx
3560 && (r_type
==R_ARM_THM_CALL
))
3561 /* V5T and above. Stub starts with ARM code, so
3562 we must be able to switch mode before
3563 reaching it, which is only possible for 'bl'
3564 (ie R_ARM_THM_CALL relocation). */
3565 ? arm_stub_long_branch_any_thumb_pic
3566 /* On V4T, use Thumb code only. */
3567 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
3569 /* non-PIC stubs. */
3570 : ((globals
->use_blx
3571 && (r_type
==R_ARM_THM_CALL
))
3572 /* V5T and above. */
3573 ? arm_stub_long_branch_any_any
3575 : arm_stub_long_branch_v4t_thumb_thumb
);
3579 stub_type
= (info
->shared
| globals
->pic_veneer
)
3581 ? arm_stub_long_branch_thumb_only_pic
3583 : arm_stub_long_branch_thumb_only
;
3590 && sym_sec
->owner
!= NULL
3591 && !INTERWORK_FLAG (sym_sec
->owner
))
3593 (*_bfd_error_handler
)
3594 (_("%B(%s): warning: interworking not enabled.\n"
3595 " first occurrence: %B: Thumb call to ARM"),
3596 sym_sec
->owner
, input_bfd
, name
);
3600 (info
->shared
| globals
->pic_veneer
)
3602 ? (r_type
== R_ARM_THM_TLS_CALL
3604 ? (globals
->use_blx
? arm_stub_long_branch_any_tls_pic
3605 : arm_stub_long_branch_v4t_thumb_tls_pic
)
3606 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
3607 /* V5T PIC and above. */
3608 ? arm_stub_long_branch_any_arm_pic
3610 : arm_stub_long_branch_v4t_thumb_arm_pic
))
3612 /* non-PIC stubs. */
3613 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
3614 /* V5T and above. */
3615 ? arm_stub_long_branch_any_any
3617 : arm_stub_long_branch_v4t_thumb_arm
);
3619 /* Handle v4t short branches. */
3620 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
3621 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
3622 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
3623 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
3627 else if (r_type
== R_ARM_CALL
3628 || r_type
== R_ARM_JUMP24
3629 || r_type
== R_ARM_PLT32
3630 || r_type
== R_ARM_TLS_CALL
)
3632 if (branch_type
== ST_BRANCH_TO_THUMB
)
3637 && sym_sec
->owner
!= NULL
3638 && !INTERWORK_FLAG (sym_sec
->owner
))
3640 (*_bfd_error_handler
)
3641 (_("%B(%s): warning: interworking not enabled.\n"
3642 " first occurrence: %B: ARM call to Thumb"),
3643 sym_sec
->owner
, input_bfd
, name
);
3646 /* We have an extra 2-bytes reach because of
3647 the mode change (bit 24 (H) of BLX encoding). */
3648 if (branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
3649 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
3650 || (r_type
== R_ARM_CALL
&& !globals
->use_blx
)
3651 || (r_type
== R_ARM_JUMP24
)
3652 || (r_type
== R_ARM_PLT32
))
3654 stub_type
= (info
->shared
| globals
->pic_veneer
)
3656 ? ((globals
->use_blx
)
3657 /* V5T and above. */
3658 ? arm_stub_long_branch_any_thumb_pic
3660 : arm_stub_long_branch_v4t_arm_thumb_pic
)
3662 /* non-PIC stubs. */
3663 : ((globals
->use_blx
)
3664 /* V5T and above. */
3665 ? arm_stub_long_branch_any_any
3667 : arm_stub_long_branch_v4t_arm_thumb
);
3673 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
3674 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
3677 (info
->shared
| globals
->pic_veneer
)
3679 ? (r_type
== R_ARM_TLS_CALL
3681 ? arm_stub_long_branch_any_tls_pic
3682 : arm_stub_long_branch_any_arm_pic
)
3683 /* non-PIC stubs. */
3684 : arm_stub_long_branch_any_any
;
3689 /* If a stub is needed, record the actual destination type. */
3690 if (stub_type
!= arm_stub_none
)
3691 *actual_branch_type
= branch_type
;
3696 /* Build a name for an entry in the stub hash table. */
3699 elf32_arm_stub_name (const asection
*input_section
,
3700 const asection
*sym_sec
,
3701 const struct elf32_arm_link_hash_entry
*hash
,
3702 const Elf_Internal_Rela
*rel
,
3703 enum elf32_arm_stub_type stub_type
)
3710 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1 + 2 + 1;
3711 stub_name
= (char *) bfd_malloc (len
);
3712 if (stub_name
!= NULL
)
3713 sprintf (stub_name
, "%08x_%s+%x_%d",
3714 input_section
->id
& 0xffffffff,
3715 hash
->root
.root
.root
.string
,
3716 (int) rel
->r_addend
& 0xffffffff,
3721 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
3722 stub_name
= (char *) bfd_malloc (len
);
3723 if (stub_name
!= NULL
)
3724 sprintf (stub_name
, "%08x_%x:%x+%x_%d",
3725 input_section
->id
& 0xffffffff,
3726 sym_sec
->id
& 0xffffffff,
3727 ELF32_R_TYPE (rel
->r_info
) == R_ARM_TLS_CALL
3728 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_THM_TLS_CALL
3729 ? 0 : (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
3730 (int) rel
->r_addend
& 0xffffffff,
3737 /* Look up an entry in the stub hash. Stub entries are cached because
3738 creating the stub name takes a bit of time. */
3740 static struct elf32_arm_stub_hash_entry
*
3741 elf32_arm_get_stub_entry (const asection
*input_section
,
3742 const asection
*sym_sec
,
3743 struct elf_link_hash_entry
*hash
,
3744 const Elf_Internal_Rela
*rel
,
3745 struct elf32_arm_link_hash_table
*htab
,
3746 enum elf32_arm_stub_type stub_type
)
3748 struct elf32_arm_stub_hash_entry
*stub_entry
;
3749 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
3750 const asection
*id_sec
;
3752 if ((input_section
->flags
& SEC_CODE
) == 0)
3755 /* If this input section is part of a group of sections sharing one
3756 stub section, then use the id of the first section in the group.
3757 Stub names need to include a section id, as there may well be
3758 more than one stub used to reach say, printf, and we need to
3759 distinguish between them. */
3760 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3762 if (h
!= NULL
&& h
->stub_cache
!= NULL
3763 && h
->stub_cache
->h
== h
3764 && h
->stub_cache
->id_sec
== id_sec
3765 && h
->stub_cache
->stub_type
== stub_type
)
3767 stub_entry
= h
->stub_cache
;
3773 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
, stub_type
);
3774 if (stub_name
== NULL
)
3777 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
3778 stub_name
, FALSE
, FALSE
);
3780 h
->stub_cache
= stub_entry
;
3788 /* Find or create a stub section. Returns a pointer to the stub section, and
3789 the section to which the stub section will be attached (in *LINK_SEC_P).
3790 LINK_SEC_P may be NULL. */
3793 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3794 struct elf32_arm_link_hash_table
*htab
)
3799 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3800 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3801 if (stub_sec
== NULL
)
3803 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3804 if (stub_sec
== NULL
)
3810 namelen
= strlen (link_sec
->name
);
3811 len
= namelen
+ sizeof (STUB_SUFFIX
);
3812 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
3816 memcpy (s_name
, link_sec
->name
, namelen
);
3817 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3818 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
3819 if (stub_sec
== NULL
)
3821 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3823 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3827 *link_sec_p
= link_sec
;
3832 /* Add a new stub entry to the stub hash. Not all fields of the new
3833 stub entry are initialised. */
3835 static struct elf32_arm_stub_hash_entry
*
3836 elf32_arm_add_stub (const char *stub_name
,
3838 struct elf32_arm_link_hash_table
*htab
)
3842 struct elf32_arm_stub_hash_entry
*stub_entry
;
3844 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
);
3845 if (stub_sec
== NULL
)
3848 /* Enter this entry into the linker stub hash table. */
3849 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3851 if (stub_entry
== NULL
)
3853 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3859 stub_entry
->stub_sec
= stub_sec
;
3860 stub_entry
->stub_offset
= 0;
3861 stub_entry
->id_sec
= link_sec
;
3866 /* Store an Arm insn into an output section not processed by
3867 elf32_arm_write_section. */
3870 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
3871 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3873 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3874 bfd_putl32 (val
, ptr
);
3876 bfd_putb32 (val
, ptr
);
3879 /* Store a 16-bit Thumb insn into an output section not processed by
3880 elf32_arm_write_section. */
3883 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
3884 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
3886 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
3887 bfd_putl16 (val
, ptr
);
3889 bfd_putb16 (val
, ptr
);
3892 /* If it's possible to change R_TYPE to a more efficient access
3893 model, return the new reloc type. */
3896 elf32_arm_tls_transition (struct bfd_link_info
*info
, int r_type
,
3897 struct elf_link_hash_entry
*h
)
3899 int is_local
= (h
== NULL
);
3901 if (info
->shared
|| (h
&& h
->root
.type
== bfd_link_hash_undefweak
))
3904 /* We do not support relaxations for Old TLS models. */
3907 case R_ARM_TLS_GOTDESC
:
3908 case R_ARM_TLS_CALL
:
3909 case R_ARM_THM_TLS_CALL
:
3910 case R_ARM_TLS_DESCSEQ
:
3911 case R_ARM_THM_TLS_DESCSEQ
:
3912 return is_local
? R_ARM_TLS_LE32
: R_ARM_TLS_IE32
;
3918 static bfd_reloc_status_type elf32_arm_final_link_relocate
3919 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
3920 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
3921 const char *, unsigned char, enum arm_st_branch_type
,
3922 struct elf_link_hash_entry
*, bfd_boolean
*, char **);
3925 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type
)
3929 case arm_stub_a8_veneer_b_cond
:
3930 case arm_stub_a8_veneer_b
:
3931 case arm_stub_a8_veneer_bl
:
3934 case arm_stub_long_branch_any_any
:
3935 case arm_stub_long_branch_v4t_arm_thumb
:
3936 case arm_stub_long_branch_thumb_only
:
3937 case arm_stub_long_branch_v4t_thumb_thumb
:
3938 case arm_stub_long_branch_v4t_thumb_arm
:
3939 case arm_stub_short_branch_v4t_thumb_arm
:
3940 case arm_stub_long_branch_any_arm_pic
:
3941 case arm_stub_long_branch_any_thumb_pic
:
3942 case arm_stub_long_branch_v4t_thumb_thumb_pic
:
3943 case arm_stub_long_branch_v4t_arm_thumb_pic
:
3944 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3945 case arm_stub_long_branch_thumb_only_pic
:
3946 case arm_stub_long_branch_any_tls_pic
:
3947 case arm_stub_long_branch_v4t_thumb_tls_pic
:
3948 case arm_stub_a8_veneer_blx
:
3952 abort (); /* Should be unreachable. */
3957 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
3961 struct elf32_arm_stub_hash_entry
*stub_entry
;
3962 struct elf32_arm_link_hash_table
*globals
;
3963 struct bfd_link_info
*info
;
3970 const insn_sequence
*template_sequence
;
3972 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
3973 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
3976 /* Massage our args to the form they really have. */
3977 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
3978 info
= (struct bfd_link_info
*) in_arg
;
3980 globals
= elf32_arm_hash_table (info
);
3981 if (globals
== NULL
)
3984 stub_sec
= stub_entry
->stub_sec
;
3986 if ((globals
->fix_cortex_a8
< 0)
3987 != (arm_stub_required_alignment (stub_entry
->stub_type
) == 2))
3988 /* We have to do less-strictly-aligned fixes last. */
3991 /* Make a note of the offset within the stubs for this entry. */
3992 stub_entry
->stub_offset
= stub_sec
->size
;
3993 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
3995 stub_bfd
= stub_sec
->owner
;
3997 /* This is the address of the stub destination. */
3998 sym_value
= (stub_entry
->target_value
3999 + stub_entry
->target_section
->output_offset
4000 + stub_entry
->target_section
->output_section
->vma
);
4002 template_sequence
= stub_entry
->stub_template
;
4003 template_size
= stub_entry
->stub_template_size
;
4006 for (i
= 0; i
< template_size
; i
++)
4008 switch (template_sequence
[i
].type
)
4012 bfd_vma data
= (bfd_vma
) template_sequence
[i
].data
;
4013 if (template_sequence
[i
].reloc_addend
!= 0)
4015 /* We've borrowed the reloc_addend field to mean we should
4016 insert a condition code into this (Thumb-1 branch)
4017 instruction. See THUMB16_BCOND_INSN. */
4018 BFD_ASSERT ((data
& 0xff00) == 0xd000);
4019 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
4021 bfd_put_16 (stub_bfd
, data
, loc
+ size
);
4027 bfd_put_16 (stub_bfd
,
4028 (template_sequence
[i
].data
>> 16) & 0xffff,
4030 bfd_put_16 (stub_bfd
, template_sequence
[i
].data
& 0xffff,
4032 if (template_sequence
[i
].r_type
!= R_ARM_NONE
)
4034 stub_reloc_idx
[nrelocs
] = i
;
4035 stub_reloc_offset
[nrelocs
++] = size
;
4041 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
,
4043 /* Handle cases where the target is encoded within the
4045 if (template_sequence
[i
].r_type
== R_ARM_JUMP24
)
4047 stub_reloc_idx
[nrelocs
] = i
;
4048 stub_reloc_offset
[nrelocs
++] = size
;
4054 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
, loc
+ size
);
4055 stub_reloc_idx
[nrelocs
] = i
;
4056 stub_reloc_offset
[nrelocs
++] = size
;
4066 stub_sec
->size
+= size
;
4068 /* Stub size has already been computed in arm_size_one_stub. Check
4070 BFD_ASSERT (size
== stub_entry
->stub_size
);
4072 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4073 if (stub_entry
->branch_type
== ST_BRANCH_TO_THUMB
)
4076 /* Assume there is at least one and at most MAXRELOCS entries to relocate
4078 BFD_ASSERT (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
);
4080 for (i
= 0; i
< nrelocs
; i
++)
4081 if (template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP24
4082 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP19
4083 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_CALL
4084 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_XPC22
)
4086 Elf_Internal_Rela rel
;
4087 bfd_boolean unresolved_reloc
;
4088 char *error_message
;
4089 enum arm_st_branch_type branch_type
4090 = (template_sequence
[stub_reloc_idx
[i
]].r_type
!= R_ARM_THM_XPC22
4091 ? ST_BRANCH_TO_THUMB
: ST_BRANCH_TO_ARM
);
4092 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
;
4094 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4095 rel
.r_info
= ELF32_R_INFO (0,
4096 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4097 rel
.r_addend
= template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4099 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
4100 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4101 template should refer back to the instruction after the original
4103 points_to
= sym_value
;
4105 /* There may be unintended consequences if this is not true. */
4106 BFD_ASSERT (stub_entry
->h
== NULL
);
4108 /* Note: _bfd_final_link_relocate doesn't handle these relocations
4109 properly. We should probably use this function unconditionally,
4110 rather than only for certain relocations listed in the enclosing
4111 conditional, for the sake of consistency. */
4112 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4113 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4114 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4115 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4116 branch_type
, (struct elf_link_hash_entry
*) stub_entry
->h
,
4117 &unresolved_reloc
, &error_message
);
4121 Elf_Internal_Rela rel
;
4122 bfd_boolean unresolved_reloc
;
4123 char *error_message
;
4124 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
4125 + template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4127 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4128 rel
.r_info
= ELF32_R_INFO (0,
4129 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4132 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4133 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4134 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4135 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4136 stub_entry
->branch_type
,
4137 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
4145 /* Calculate the template, template size and instruction size for a stub.
4146 Return value is the instruction size. */
4149 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
4150 const insn_sequence
**stub_template
,
4151 int *stub_template_size
)
4153 const insn_sequence
*template_sequence
= NULL
;
4154 int template_size
= 0, i
;
4157 template_sequence
= stub_definitions
[stub_type
].template_sequence
;
4159 *stub_template
= template_sequence
;
4161 template_size
= stub_definitions
[stub_type
].template_size
;
4162 if (stub_template_size
)
4163 *stub_template_size
= template_size
;
4166 for (i
= 0; i
< template_size
; i
++)
4168 switch (template_sequence
[i
].type
)
4189 /* As above, but don't actually build the stub. Just bump offset so
4190 we know stub section sizes. */
4193 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
4194 void *in_arg ATTRIBUTE_UNUSED
)
4196 struct elf32_arm_stub_hash_entry
*stub_entry
;
4197 const insn_sequence
*template_sequence
;
4198 int template_size
, size
;
4200 /* Massage our args to the form they really have. */
4201 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4203 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
4204 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
4206 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template_sequence
,
4209 stub_entry
->stub_size
= size
;
4210 stub_entry
->stub_template
= template_sequence
;
4211 stub_entry
->stub_template_size
= template_size
;
4213 size
= (size
+ 7) & ~7;
4214 stub_entry
->stub_sec
->size
+= size
;
4219 /* External entry points for sizing and building linker stubs. */
4221 /* Set up various things so that we can make a list of input sections
4222 for each output section included in the link. Returns -1 on error,
4223 0 when no stubs will be needed, and 1 on success. */
4226 elf32_arm_setup_section_lists (bfd
*output_bfd
,
4227 struct bfd_link_info
*info
)
4230 unsigned int bfd_count
;
4231 int top_id
, top_index
;
4233 asection
**input_list
, **list
;
4235 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4239 if (! is_elf_hash_table (htab
))
4242 /* Count the number of input BFDs and find the top input section id. */
4243 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
4245 input_bfd
= input_bfd
->link_next
)
4248 for (section
= input_bfd
->sections
;
4250 section
= section
->next
)
4252 if (top_id
< section
->id
)
4253 top_id
= section
->id
;
4256 htab
->bfd_count
= bfd_count
;
4258 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
4259 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
4260 if (htab
->stub_group
== NULL
)
4262 htab
->top_id
= top_id
;
4264 /* We can't use output_bfd->section_count here to find the top output
4265 section index as some sections may have been removed, and
4266 _bfd_strip_section_from_output doesn't renumber the indices. */
4267 for (section
= output_bfd
->sections
, top_index
= 0;
4269 section
= section
->next
)
4271 if (top_index
< section
->index
)
4272 top_index
= section
->index
;
4275 htab
->top_index
= top_index
;
4276 amt
= sizeof (asection
*) * (top_index
+ 1);
4277 input_list
= (asection
**) bfd_malloc (amt
);
4278 htab
->input_list
= input_list
;
4279 if (input_list
== NULL
)
4282 /* For sections we aren't interested in, mark their entries with a
4283 value we can check later. */
4284 list
= input_list
+ top_index
;
4286 *list
= bfd_abs_section_ptr
;
4287 while (list
-- != input_list
);
4289 for (section
= output_bfd
->sections
;
4291 section
= section
->next
)
4293 if ((section
->flags
& SEC_CODE
) != 0)
4294 input_list
[section
->index
] = NULL
;
4300 /* The linker repeatedly calls this function for each input section,
4301 in the order that input sections are linked into output sections.
4302 Build lists of input sections to determine groupings between which
4303 we may insert linker stubs. */
4306 elf32_arm_next_input_section (struct bfd_link_info
*info
,
4309 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4314 if (isec
->output_section
->index
<= htab
->top_index
)
4316 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
4318 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
4320 /* Steal the link_sec pointer for our list. */
4321 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4322 /* This happens to make the list in reverse order,
4323 which we reverse later. */
4324 PREV_SEC (isec
) = *list
;
4330 /* See whether we can group stub sections together. Grouping stub
4331 sections may result in fewer stubs. More importantly, we need to
4332 put all .init* and .fini* stubs at the end of the .init or
4333 .fini output sections respectively, because glibc splits the
4334 _init and _fini functions into multiple parts. Putting a stub in
4335 the middle of a function is not a good idea. */
4338 group_sections (struct elf32_arm_link_hash_table
*htab
,
4339 bfd_size_type stub_group_size
,
4340 bfd_boolean stubs_always_after_branch
)
4342 asection
**list
= htab
->input_list
;
4346 asection
*tail
= *list
;
4349 if (tail
== bfd_abs_section_ptr
)
4352 /* Reverse the list: we must avoid placing stubs at the
4353 beginning of the section because the beginning of the text
4354 section may be required for an interrupt vector in bare metal
4356 #define NEXT_SEC PREV_SEC
4358 while (tail
!= NULL
)
4360 /* Pop from tail. */
4361 asection
*item
= tail
;
4362 tail
= PREV_SEC (item
);
4365 NEXT_SEC (item
) = head
;
4369 while (head
!= NULL
)
4373 bfd_vma stub_group_start
= head
->output_offset
;
4374 bfd_vma end_of_next
;
4377 while (NEXT_SEC (curr
) != NULL
)
4379 next
= NEXT_SEC (curr
);
4380 end_of_next
= next
->output_offset
+ next
->size
;
4381 if (end_of_next
- stub_group_start
>= stub_group_size
)
4382 /* End of NEXT is too far from start, so stop. */
4384 /* Add NEXT to the group. */
4388 /* OK, the size from the start to the start of CURR is less
4389 than stub_group_size and thus can be handled by one stub
4390 section. (Or the head section is itself larger than
4391 stub_group_size, in which case we may be toast.)
4392 We should really be keeping track of the total size of
4393 stubs added here, as stubs contribute to the final output
4397 next
= NEXT_SEC (head
);
4398 /* Set up this stub group. */
4399 htab
->stub_group
[head
->id
].link_sec
= curr
;
4401 while (head
!= curr
&& (head
= next
) != NULL
);
4403 /* But wait, there's more! Input sections up to stub_group_size
4404 bytes after the stub section can be handled by it too. */
4405 if (!stubs_always_after_branch
)
4407 stub_group_start
= curr
->output_offset
+ curr
->size
;
4409 while (next
!= NULL
)
4411 end_of_next
= next
->output_offset
+ next
->size
;
4412 if (end_of_next
- stub_group_start
>= stub_group_size
)
4413 /* End of NEXT is too far from stubs, so stop. */
4415 /* Add NEXT to the stub group. */
4417 next
= NEXT_SEC (head
);
4418 htab
->stub_group
[head
->id
].link_sec
= curr
;
4424 while (list
++ != htab
->input_list
+ htab
->top_index
);
4426 free (htab
->input_list
);
4431 /* Comparison function for sorting/searching relocations relating to Cortex-A8
4435 a8_reloc_compare (const void *a
, const void *b
)
4437 const struct a8_erratum_reloc
*ra
= (const struct a8_erratum_reloc
*) a
;
4438 const struct a8_erratum_reloc
*rb
= (const struct a8_erratum_reloc
*) b
;
4440 if (ra
->from
< rb
->from
)
4442 else if (ra
->from
> rb
->from
)
4448 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
4449 const char *, char **);
4451 /* Helper function to scan code for sequences which might trigger the Cortex-A8
4452 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
4453 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
4457 cortex_a8_erratum_scan (bfd
*input_bfd
,
4458 struct bfd_link_info
*info
,
4459 struct a8_erratum_fix
**a8_fixes_p
,
4460 unsigned int *num_a8_fixes_p
,
4461 unsigned int *a8_fix_table_size_p
,
4462 struct a8_erratum_reloc
*a8_relocs
,
4463 unsigned int num_a8_relocs
,
4464 unsigned prev_num_a8_fixes
,
4465 bfd_boolean
*stub_changed_p
)
4468 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4469 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
4470 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
4471 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
4476 for (section
= input_bfd
->sections
;
4478 section
= section
->next
)
4480 bfd_byte
*contents
= NULL
;
4481 struct _arm_elf_section_data
*sec_data
;
4485 if (elf_section_type (section
) != SHT_PROGBITS
4486 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
4487 || (section
->flags
& SEC_EXCLUDE
) != 0
4488 || (section
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
4489 || (section
->output_section
== bfd_abs_section_ptr
))
4492 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
4494 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
4495 contents
= elf_section_data (section
)->this_hdr
.contents
;
4496 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
4499 sec_data
= elf32_arm_section_data (section
);
4501 for (span
= 0; span
< sec_data
->mapcount
; span
++)
4503 unsigned int span_start
= sec_data
->map
[span
].vma
;
4504 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
4505 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
4507 char span_type
= sec_data
->map
[span
].type
;
4508 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
4510 if (span_type
!= 't')
4513 /* Span is entirely within a single 4KB region: skip scanning. */
4514 if (((base_vma
+ span_start
) & ~0xfff)
4515 == ((base_vma
+ span_end
) & ~0xfff))
4518 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4520 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4521 * The branch target is in the same 4KB region as the
4522 first half of the branch.
4523 * The instruction before the branch is a 32-bit
4524 length non-branch instruction. */
4525 for (i
= span_start
; i
< span_end
;)
4527 unsigned int insn
= bfd_getl16 (&contents
[i
]);
4528 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
4529 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
4531 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
4536 /* Load the rest of the insn (in manual-friendly order). */
4537 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
4539 /* Encoding T4: B<c>.W. */
4540 is_b
= (insn
& 0xf800d000) == 0xf0009000;
4541 /* Encoding T1: BL<c>.W. */
4542 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
4543 /* Encoding T2: BLX<c>.W. */
4544 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
4545 /* Encoding T3: B<c>.W (not permitted in IT block). */
4546 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
4547 && (insn
& 0x07f00000) != 0x03800000;
4550 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
4552 if (((base_vma
+ i
) & 0xfff) == 0xffe
4556 && ! last_was_branch
)
4558 bfd_signed_vma offset
= 0;
4559 bfd_boolean force_target_arm
= FALSE
;
4560 bfd_boolean force_target_thumb
= FALSE
;
4562 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
4563 struct a8_erratum_reloc key
, *found
;
4564 bfd_boolean use_plt
= FALSE
;
4566 key
.from
= base_vma
+ i
;
4567 found
= (struct a8_erratum_reloc
*)
4568 bsearch (&key
, a8_relocs
, num_a8_relocs
,
4569 sizeof (struct a8_erratum_reloc
),
4574 char *error_message
= NULL
;
4575 struct elf_link_hash_entry
*entry
;
4577 /* We don't care about the error returned from this
4578 function, only if there is glue or not. */
4579 entry
= find_thumb_glue (info
, found
->sym_name
,
4583 found
->non_a8_stub
= TRUE
;
4585 /* Keep a simpler condition, for the sake of clarity. */
4586 if (htab
->root
.splt
!= NULL
&& found
->hash
!= NULL
4587 && found
->hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4590 if (found
->r_type
== R_ARM_THM_CALL
)
4592 if (found
->branch_type
== ST_BRANCH_TO_ARM
4594 force_target_arm
= TRUE
;
4596 force_target_thumb
= TRUE
;
4600 /* Check if we have an offending branch instruction. */
4602 if (found
&& found
->non_a8_stub
)
4603 /* We've already made a stub for this instruction, e.g.
4604 it's a long branch or a Thumb->ARM stub. Assume that
4605 stub will suffice to work around the A8 erratum (see
4606 setting of always_after_branch above). */
4610 offset
= (insn
& 0x7ff) << 1;
4611 offset
|= (insn
& 0x3f0000) >> 4;
4612 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
4613 offset
|= (insn
& 0x800) ? 0x80000 : 0;
4614 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
4615 if (offset
& 0x100000)
4616 offset
|= ~ ((bfd_signed_vma
) 0xfffff);
4617 stub_type
= arm_stub_a8_veneer_b_cond
;
4619 else if (is_b
|| is_bl
|| is_blx
)
4621 int s
= (insn
& 0x4000000) != 0;
4622 int j1
= (insn
& 0x2000) != 0;
4623 int j2
= (insn
& 0x800) != 0;
4627 offset
= (insn
& 0x7ff) << 1;
4628 offset
|= (insn
& 0x3ff0000) >> 4;
4632 if (offset
& 0x1000000)
4633 offset
|= ~ ((bfd_signed_vma
) 0xffffff);
4636 offset
&= ~ ((bfd_signed_vma
) 3);
4638 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
4639 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
4642 if (stub_type
!= arm_stub_none
)
4644 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
4646 /* The original instruction is a BL, but the target is
4647 an ARM instruction. If we were not making a stub,
4648 the BL would have been converted to a BLX. Use the
4649 BLX stub instead in that case. */
4650 if (htab
->use_blx
&& force_target_arm
4651 && stub_type
== arm_stub_a8_veneer_bl
)
4653 stub_type
= arm_stub_a8_veneer_blx
;
4657 /* Conversely, if the original instruction was
4658 BLX but the target is Thumb mode, use the BL
4660 else if (force_target_thumb
4661 && stub_type
== arm_stub_a8_veneer_blx
)
4663 stub_type
= arm_stub_a8_veneer_bl
;
4669 pc_for_insn
&= ~ ((bfd_vma
) 3);
4671 /* If we found a relocation, use the proper destination,
4672 not the offset in the (unrelocated) instruction.
4673 Note this is always done if we switched the stub type
4677 (bfd_signed_vma
) (found
->destination
- pc_for_insn
);
4679 /* If the stub will use a Thumb-mode branch to a
4680 PLT target, redirect it to the preceding Thumb
4682 if (stub_type
!= arm_stub_a8_veneer_blx
&& use_plt
)
4683 offset
-= PLT_THUMB_STUB_SIZE
;
4685 target
= pc_for_insn
+ offset
;
4687 /* The BLX stub is ARM-mode code. Adjust the offset to
4688 take the different PC value (+8 instead of +4) into
4690 if (stub_type
== arm_stub_a8_veneer_blx
)
4693 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
4695 char *stub_name
= NULL
;
4697 if (num_a8_fixes
== a8_fix_table_size
)
4699 a8_fix_table_size
*= 2;
4700 a8_fixes
= (struct a8_erratum_fix
*)
4701 bfd_realloc (a8_fixes
,
4702 sizeof (struct a8_erratum_fix
)
4703 * a8_fix_table_size
);
4706 if (num_a8_fixes
< prev_num_a8_fixes
)
4708 /* If we're doing a subsequent scan,
4709 check if we've found the same fix as
4710 before, and try and reuse the stub
4712 stub_name
= a8_fixes
[num_a8_fixes
].stub_name
;
4713 if ((a8_fixes
[num_a8_fixes
].section
!= section
)
4714 || (a8_fixes
[num_a8_fixes
].offset
!= i
))
4718 *stub_changed_p
= TRUE
;
4724 stub_name
= (char *) bfd_malloc (8 + 1 + 8 + 1);
4725 if (stub_name
!= NULL
)
4726 sprintf (stub_name
, "%x:%x", section
->id
, i
);
4729 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
4730 a8_fixes
[num_a8_fixes
].section
= section
;
4731 a8_fixes
[num_a8_fixes
].offset
= i
;
4732 a8_fixes
[num_a8_fixes
].addend
= offset
;
4733 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
4734 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
4735 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
4736 a8_fixes
[num_a8_fixes
].branch_type
=
4737 is_blx
? ST_BRANCH_TO_ARM
: ST_BRANCH_TO_THUMB
;
4744 i
+= insn_32bit
? 4 : 2;
4745 last_was_32bit
= insn_32bit
;
4746 last_was_branch
= is_32bit_branch
;
4750 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4754 *a8_fixes_p
= a8_fixes
;
4755 *num_a8_fixes_p
= num_a8_fixes
;
4756 *a8_fix_table_size_p
= a8_fix_table_size
;
4761 /* Determine and set the size of the stub section for a final link.
4763 The basic idea here is to examine all the relocations looking for
4764 PC-relative calls to a target that is unreachable with a "bl"
4768 elf32_arm_size_stubs (bfd
*output_bfd
,
4770 struct bfd_link_info
*info
,
4771 bfd_signed_vma group_size
,
4772 asection
* (*add_stub_section
) (const char *, asection
*),
4773 void (*layout_sections_again
) (void))
4775 bfd_size_type stub_group_size
;
4776 bfd_boolean stubs_always_after_branch
;
4777 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4778 struct a8_erratum_fix
*a8_fixes
= NULL
;
4779 unsigned int num_a8_fixes
= 0, a8_fix_table_size
= 10;
4780 struct a8_erratum_reloc
*a8_relocs
= NULL
;
4781 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
4786 if (htab
->fix_cortex_a8
)
4788 a8_fixes
= (struct a8_erratum_fix
*)
4789 bfd_zmalloc (sizeof (struct a8_erratum_fix
) * a8_fix_table_size
);
4790 a8_relocs
= (struct a8_erratum_reloc
*)
4791 bfd_zmalloc (sizeof (struct a8_erratum_reloc
) * a8_reloc_table_size
);
4794 /* Propagate mach to stub bfd, because it may not have been
4795 finalized when we created stub_bfd. */
4796 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4797 bfd_get_mach (output_bfd
));
4799 /* Stash our params away. */
4800 htab
->stub_bfd
= stub_bfd
;
4801 htab
->add_stub_section
= add_stub_section
;
4802 htab
->layout_sections_again
= layout_sections_again
;
4803 stubs_always_after_branch
= group_size
< 0;
4805 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4806 as the first half of a 32-bit branch straddling two 4K pages. This is a
4807 crude way of enforcing that. */
4808 if (htab
->fix_cortex_a8
)
4809 stubs_always_after_branch
= 1;
4812 stub_group_size
= -group_size
;
4814 stub_group_size
= group_size
;
4816 if (stub_group_size
== 1)
4818 /* Default values. */
4819 /* Thumb branch range is +-4MB has to be used as the default
4820 maximum size (a given section can contain both ARM and Thumb
4821 code, so the worst case has to be taken into account).
4823 This value is 24K less than that, which allows for 2025
4824 12-byte stubs. If we exceed that, then we will fail to link.
4825 The user will have to relink with an explicit group size
4827 stub_group_size
= 4170000;
4830 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
4832 /* If we're applying the cortex A8 fix, we need to determine the
4833 program header size now, because we cannot change it later --
4834 that could alter section placements. Notice the A8 erratum fix
4835 ends up requiring the section addresses to remain unchanged
4836 modulo the page size. That's something we cannot represent
4837 inside BFD, and we don't want to force the section alignment to
4838 be the page size. */
4839 if (htab
->fix_cortex_a8
)
4840 (*htab
->layout_sections_again
) ();
4845 unsigned int bfd_indx
;
4847 bfd_boolean stub_changed
= FALSE
;
4848 unsigned prev_num_a8_fixes
= num_a8_fixes
;
4851 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4853 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4855 Elf_Internal_Shdr
*symtab_hdr
;
4857 Elf_Internal_Sym
*local_syms
= NULL
;
4861 /* We'll need the symbol table in a second. */
4862 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4863 if (symtab_hdr
->sh_info
== 0)
4866 /* Walk over each section attached to the input bfd. */
4867 for (section
= input_bfd
->sections
;
4869 section
= section
->next
)
4871 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4873 /* If there aren't any relocs, then there's nothing more
4875 if ((section
->flags
& SEC_RELOC
) == 0
4876 || section
->reloc_count
== 0
4877 || (section
->flags
& SEC_CODE
) == 0)
4880 /* If this section is a link-once section that will be
4881 discarded, then don't create any stubs. */
4882 if (section
->output_section
== NULL
4883 || section
->output_section
->owner
!= output_bfd
)
4886 /* Get the relocs. */
4888 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
4889 NULL
, info
->keep_memory
);
4890 if (internal_relocs
== NULL
)
4891 goto error_ret_free_local
;
4893 /* Now examine each relocation. */
4894 irela
= internal_relocs
;
4895 irelaend
= irela
+ section
->reloc_count
;
4896 for (; irela
< irelaend
; irela
++)
4898 unsigned int r_type
, r_indx
;
4899 enum elf32_arm_stub_type stub_type
;
4900 struct elf32_arm_stub_hash_entry
*stub_entry
;
4903 bfd_vma destination
;
4904 struct elf32_arm_link_hash_entry
*hash
;
4905 const char *sym_name
;
4907 const asection
*id_sec
;
4908 unsigned char st_type
;
4909 enum arm_st_branch_type branch_type
;
4910 bfd_boolean created_stub
= FALSE
;
4912 r_type
= ELF32_R_TYPE (irela
->r_info
);
4913 r_indx
= ELF32_R_SYM (irela
->r_info
);
4915 if (r_type
>= (unsigned int) R_ARM_max
)
4917 bfd_set_error (bfd_error_bad_value
);
4918 error_ret_free_internal
:
4919 if (elf_section_data (section
)->relocs
== NULL
)
4920 free (internal_relocs
);
4921 goto error_ret_free_local
;
4925 if (r_indx
>= symtab_hdr
->sh_info
)
4926 hash
= elf32_arm_hash_entry
4927 (elf_sym_hashes (input_bfd
)
4928 [r_indx
- symtab_hdr
->sh_info
]);
4930 /* Only look for stubs on branch instructions, or
4931 non-relaxed TLSCALL */
4932 if ((r_type
!= (unsigned int) R_ARM_CALL
)
4933 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
4934 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
4935 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
4936 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
4937 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
4938 && (r_type
!= (unsigned int) R_ARM_PLT32
)
4939 && !((r_type
== (unsigned int) R_ARM_TLS_CALL
4940 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
4941 && r_type
== elf32_arm_tls_transition
4942 (info
, r_type
, &hash
->root
)
4943 && ((hash
? hash
->tls_type
4944 : (elf32_arm_local_got_tls_type
4945 (input_bfd
)[r_indx
]))
4946 & GOT_TLS_GDESC
) != 0))
4949 /* Now determine the call target, its name, value,
4956 if (r_type
== (unsigned int) R_ARM_TLS_CALL
4957 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
4959 /* A non-relaxed TLS call. The target is the
4960 plt-resident trampoline and nothing to do
4962 BFD_ASSERT (htab
->tls_trampoline
> 0);
4963 sym_sec
= htab
->root
.splt
;
4964 sym_value
= htab
->tls_trampoline
;
4967 branch_type
= ST_BRANCH_TO_ARM
;
4971 /* It's a local symbol. */
4972 Elf_Internal_Sym
*sym
;
4974 if (local_syms
== NULL
)
4977 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4978 if (local_syms
== NULL
)
4980 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4981 symtab_hdr
->sh_info
, 0,
4983 if (local_syms
== NULL
)
4984 goto error_ret_free_internal
;
4987 sym
= local_syms
+ r_indx
;
4988 if (sym
->st_shndx
== SHN_UNDEF
)
4989 sym_sec
= bfd_und_section_ptr
;
4990 else if (sym
->st_shndx
== SHN_ABS
)
4991 sym_sec
= bfd_abs_section_ptr
;
4992 else if (sym
->st_shndx
== SHN_COMMON
)
4993 sym_sec
= bfd_com_section_ptr
;
4996 bfd_section_from_elf_index (input_bfd
, sym
->st_shndx
);
4999 /* This is an undefined symbol. It can never
5003 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
5004 sym_value
= sym
->st_value
;
5005 destination
= (sym_value
+ irela
->r_addend
5006 + sym_sec
->output_offset
5007 + sym_sec
->output_section
->vma
);
5008 st_type
= ELF_ST_TYPE (sym
->st_info
);
5009 branch_type
= ARM_SYM_BRANCH_TYPE (sym
);
5011 = bfd_elf_string_from_elf_section (input_bfd
,
5012 symtab_hdr
->sh_link
,
5017 /* It's an external symbol. */
5018 while (hash
->root
.root
.type
== bfd_link_hash_indirect
5019 || hash
->root
.root
.type
== bfd_link_hash_warning
)
5020 hash
= ((struct elf32_arm_link_hash_entry
*)
5021 hash
->root
.root
.u
.i
.link
);
5023 if (hash
->root
.root
.type
== bfd_link_hash_defined
5024 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
5026 sym_sec
= hash
->root
.root
.u
.def
.section
;
5027 sym_value
= hash
->root
.root
.u
.def
.value
;
5029 struct elf32_arm_link_hash_table
*globals
=
5030 elf32_arm_hash_table (info
);
5032 /* For a destination in a shared library,
5033 use the PLT stub as target address to
5034 decide whether a branch stub is
5037 && globals
->root
.splt
!= NULL
5039 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5041 sym_sec
= globals
->root
.splt
;
5042 sym_value
= hash
->root
.plt
.offset
;
5043 if (sym_sec
->output_section
!= NULL
)
5044 destination
= (sym_value
5045 + sym_sec
->output_offset
5046 + sym_sec
->output_section
->vma
);
5048 else if (sym_sec
->output_section
!= NULL
)
5049 destination
= (sym_value
+ irela
->r_addend
5050 + sym_sec
->output_offset
5051 + sym_sec
->output_section
->vma
);
5053 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
5054 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
5056 /* For a shared library, use the PLT stub as
5057 target address to decide whether a long
5058 branch stub is needed.
5059 For absolute code, they cannot be handled. */
5060 struct elf32_arm_link_hash_table
*globals
=
5061 elf32_arm_hash_table (info
);
5064 && globals
->root
.splt
!= NULL
5066 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5068 sym_sec
= globals
->root
.splt
;
5069 sym_value
= hash
->root
.plt
.offset
;
5070 if (sym_sec
->output_section
!= NULL
)
5071 destination
= (sym_value
5072 + sym_sec
->output_offset
5073 + sym_sec
->output_section
->vma
);
5080 bfd_set_error (bfd_error_bad_value
);
5081 goto error_ret_free_internal
;
5083 st_type
= hash
->root
.type
;
5084 branch_type
= hash
->root
.target_internal
;
5085 sym_name
= hash
->root
.root
.root
.string
;
5090 /* Determine what (if any) linker stub is needed. */
5091 stub_type
= arm_type_of_stub (info
, section
, irela
,
5092 st_type
, &branch_type
,
5093 hash
, destination
, sym_sec
,
5094 input_bfd
, sym_name
);
5095 if (stub_type
== arm_stub_none
)
5098 /* Support for grouping stub sections. */
5099 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
5101 /* Get the name of this stub. */
5102 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
,
5105 goto error_ret_free_internal
;
5107 /* We've either created a stub for this reloc already,
5108 or we are about to. */
5109 created_stub
= TRUE
;
5111 stub_entry
= arm_stub_hash_lookup
5112 (&htab
->stub_hash_table
, stub_name
,
5114 if (stub_entry
!= NULL
)
5116 /* The proper stub has already been created. */
5118 stub_entry
->target_value
= sym_value
;
5122 stub_entry
= elf32_arm_add_stub (stub_name
, section
,
5124 if (stub_entry
== NULL
)
5127 goto error_ret_free_internal
;
5130 stub_entry
->target_value
= sym_value
;
5131 stub_entry
->target_section
= sym_sec
;
5132 stub_entry
->stub_type
= stub_type
;
5133 stub_entry
->h
= hash
;
5134 stub_entry
->branch_type
= branch_type
;
5136 if (sym_name
== NULL
)
5137 sym_name
= "unnamed";
5138 stub_entry
->output_name
= (char *)
5139 bfd_alloc (htab
->stub_bfd
,
5140 sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
5141 + strlen (sym_name
));
5142 if (stub_entry
->output_name
== NULL
)
5145 goto error_ret_free_internal
;
5148 /* For historical reasons, use the existing names for
5149 ARM-to-Thumb and Thumb-to-ARM stubs. */
5150 if ((r_type
== (unsigned int) R_ARM_THM_CALL
5151 || r_type
== (unsigned int) R_ARM_THM_JUMP24
)
5152 && branch_type
== ST_BRANCH_TO_ARM
)
5153 sprintf (stub_entry
->output_name
,
5154 THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
5155 else if ((r_type
== (unsigned int) R_ARM_CALL
5156 || r_type
== (unsigned int) R_ARM_JUMP24
)
5157 && branch_type
== ST_BRANCH_TO_THUMB
)
5158 sprintf (stub_entry
->output_name
,
5159 ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
5161 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
,
5164 stub_changed
= TRUE
;
5168 /* Look for relocations which might trigger Cortex-A8
5170 if (htab
->fix_cortex_a8
5171 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
5172 || r_type
== (unsigned int) R_ARM_THM_JUMP19
5173 || r_type
== (unsigned int) R_ARM_THM_CALL
5174 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
5176 bfd_vma from
= section
->output_section
->vma
5177 + section
->output_offset
5180 if ((from
& 0xfff) == 0xffe)
5182 /* Found a candidate. Note we haven't checked the
5183 destination is within 4K here: if we do so (and
5184 don't create an entry in a8_relocs) we can't tell
5185 that a branch should have been relocated when
5187 if (num_a8_relocs
== a8_reloc_table_size
)
5189 a8_reloc_table_size
*= 2;
5190 a8_relocs
= (struct a8_erratum_reloc
*)
5191 bfd_realloc (a8_relocs
,
5192 sizeof (struct a8_erratum_reloc
)
5193 * a8_reloc_table_size
);
5196 a8_relocs
[num_a8_relocs
].from
= from
;
5197 a8_relocs
[num_a8_relocs
].destination
= destination
;
5198 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
5199 a8_relocs
[num_a8_relocs
].branch_type
= branch_type
;
5200 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
5201 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
5202 a8_relocs
[num_a8_relocs
].hash
= hash
;
5209 /* We're done with the internal relocs, free them. */
5210 if (elf_section_data (section
)->relocs
== NULL
)
5211 free (internal_relocs
);
5214 if (htab
->fix_cortex_a8
)
5216 /* Sort relocs which might apply to Cortex-A8 erratum. */
5217 qsort (a8_relocs
, num_a8_relocs
,
5218 sizeof (struct a8_erratum_reloc
),
5221 /* Scan for branches which might trigger Cortex-A8 erratum. */
5222 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
5223 &num_a8_fixes
, &a8_fix_table_size
,
5224 a8_relocs
, num_a8_relocs
,
5225 prev_num_a8_fixes
, &stub_changed
)
5227 goto error_ret_free_local
;
5231 if (prev_num_a8_fixes
!= num_a8_fixes
)
5232 stub_changed
= TRUE
;
5237 /* OK, we've added some stubs. Find out the new size of the
5239 for (stub_sec
= htab
->stub_bfd
->sections
;
5241 stub_sec
= stub_sec
->next
)
5243 /* Ignore non-stub sections. */
5244 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
5250 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
5252 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
5253 if (htab
->fix_cortex_a8
)
5254 for (i
= 0; i
< num_a8_fixes
; i
++)
5256 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
5257 a8_fixes
[i
].section
, htab
);
5259 if (stub_sec
== NULL
)
5260 goto error_ret_free_local
;
5263 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
5268 /* Ask the linker to do its stuff. */
5269 (*htab
->layout_sections_again
) ();
5272 /* Add stubs for Cortex-A8 erratum fixes now. */
5273 if (htab
->fix_cortex_a8
)
5275 for (i
= 0; i
< num_a8_fixes
; i
++)
5277 struct elf32_arm_stub_hash_entry
*stub_entry
;
5278 char *stub_name
= a8_fixes
[i
].stub_name
;
5279 asection
*section
= a8_fixes
[i
].section
;
5280 unsigned int section_id
= a8_fixes
[i
].section
->id
;
5281 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
5282 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
5283 const insn_sequence
*template_sequence
;
5284 int template_size
, size
= 0;
5286 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
5288 if (stub_entry
== NULL
)
5290 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
5296 stub_entry
->stub_sec
= stub_sec
;
5297 stub_entry
->stub_offset
= 0;
5298 stub_entry
->id_sec
= link_sec
;
5299 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
5300 stub_entry
->target_section
= a8_fixes
[i
].section
;
5301 stub_entry
->target_value
= a8_fixes
[i
].offset
;
5302 stub_entry
->target_addend
= a8_fixes
[i
].addend
;
5303 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
5304 stub_entry
->branch_type
= a8_fixes
[i
].branch_type
;
5306 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
,
5310 stub_entry
->stub_size
= size
;
5311 stub_entry
->stub_template
= template_sequence
;
5312 stub_entry
->stub_template_size
= template_size
;
5315 /* Stash the Cortex-A8 erratum fix array for use later in
5316 elf32_arm_write_section(). */
5317 htab
->a8_erratum_fixes
= a8_fixes
;
5318 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
5322 htab
->a8_erratum_fixes
= NULL
;
5323 htab
->num_a8_erratum_fixes
= 0;
5327 error_ret_free_local
:
5331 /* Build all the stubs associated with the current output file. The
5332 stubs are kept in a hash table attached to the main linker hash
5333 table. We also set up the .plt entries for statically linked PIC
5334 functions here. This function is called via arm_elf_finish in the
5338 elf32_arm_build_stubs (struct bfd_link_info
*info
)
5341 struct bfd_hash_table
*table
;
5342 struct elf32_arm_link_hash_table
*htab
;
5344 htab
= elf32_arm_hash_table (info
);
5348 for (stub_sec
= htab
->stub_bfd
->sections
;
5350 stub_sec
= stub_sec
->next
)
5354 /* Ignore non-stub sections. */
5355 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
5358 /* Allocate memory to hold the linker stubs. */
5359 size
= stub_sec
->size
;
5360 stub_sec
->contents
= (unsigned char *) bfd_zalloc (htab
->stub_bfd
, size
);
5361 if (stub_sec
->contents
== NULL
&& size
!= 0)
5366 /* Build the stubs as directed by the stub hash table. */
5367 table
= &htab
->stub_hash_table
;
5368 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
5369 if (htab
->fix_cortex_a8
)
5371 /* Place the cortex a8 stubs last. */
5372 htab
->fix_cortex_a8
= -1;
5373 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
5379 /* Locate the Thumb encoded calling stub for NAME. */
5381 static struct elf_link_hash_entry
*
5382 find_thumb_glue (struct bfd_link_info
*link_info
,
5384 char **error_message
)
5387 struct elf_link_hash_entry
*hash
;
5388 struct elf32_arm_link_hash_table
*hash_table
;
5390 /* We need a pointer to the armelf specific hash table. */
5391 hash_table
= elf32_arm_hash_table (link_info
);
5392 if (hash_table
== NULL
)
5395 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5396 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
5398 BFD_ASSERT (tmp_name
);
5400 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
5402 hash
= elf_link_hash_lookup
5403 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5406 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
5407 tmp_name
, name
) == -1)
5408 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
5415 /* Locate the ARM encoded calling stub for NAME. */
5417 static struct elf_link_hash_entry
*
5418 find_arm_glue (struct bfd_link_info
*link_info
,
5420 char **error_message
)
5423 struct elf_link_hash_entry
*myh
;
5424 struct elf32_arm_link_hash_table
*hash_table
;
5426 /* We need a pointer to the elfarm specific hash table. */
5427 hash_table
= elf32_arm_hash_table (link_info
);
5428 if (hash_table
== NULL
)
5431 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5432 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5434 BFD_ASSERT (tmp_name
);
5436 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5438 myh
= elf_link_hash_lookup
5439 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5442 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
5443 tmp_name
, name
) == -1)
5444 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
5451 /* ARM->Thumb glue (static images):
5455 ldr r12, __func_addr
5458 .word func @ behave as if you saw a ARM_32 reloc.
5465 .word func @ behave as if you saw a ARM_32 reloc.
5467 (relocatable images)
5470 ldr r12, __func_offset
5476 #define ARM2THUMB_STATIC_GLUE_SIZE 12
5477 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
5478 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
5479 static const insn32 a2t3_func_addr_insn
= 0x00000001;
5481 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
5482 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
5483 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
5485 #define ARM2THUMB_PIC_GLUE_SIZE 16
5486 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
5487 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
5488 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
5490 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
5494 __func_from_thumb: __func_from_thumb:
5496 nop ldr r6, __func_addr
5506 #define THUMB2ARM_GLUE_SIZE 8
5507 static const insn16 t2a1_bx_pc_insn
= 0x4778;
5508 static const insn16 t2a2_noop_insn
= 0x46c0;
5509 static const insn32 t2a3_b_insn
= 0xea000000;
5511 #define VFP11_ERRATUM_VENEER_SIZE 8
5513 #define ARM_BX_VENEER_SIZE 12
5514 static const insn32 armbx1_tst_insn
= 0xe3100001;
5515 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
5516 static const insn32 armbx3_bx_insn
= 0xe12fff10;
5518 #ifndef ELFARM_NABI_C_INCLUDED
5520 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
5523 bfd_byte
* contents
;
5527 /* Do not include empty glue sections in the output. */
5530 s
= bfd_get_section_by_name (abfd
, name
);
5532 s
->flags
|= SEC_EXCLUDE
;
5537 BFD_ASSERT (abfd
!= NULL
);
5539 s
= bfd_get_section_by_name (abfd
, name
);
5540 BFD_ASSERT (s
!= NULL
);
5542 contents
= (bfd_byte
*) bfd_alloc (abfd
, size
);
5544 BFD_ASSERT (s
->size
== size
);
5545 s
->contents
= contents
;
5549 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
5551 struct elf32_arm_link_hash_table
* globals
;
5553 globals
= elf32_arm_hash_table (info
);
5554 BFD_ASSERT (globals
!= NULL
);
5556 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5557 globals
->arm_glue_size
,
5558 ARM2THUMB_GLUE_SECTION_NAME
);
5560 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5561 globals
->thumb_glue_size
,
5562 THUMB2ARM_GLUE_SECTION_NAME
);
5564 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5565 globals
->vfp11_erratum_glue_size
,
5566 VFP11_ERRATUM_VENEER_SECTION_NAME
);
5568 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5569 globals
->bx_glue_size
,
5570 ARM_BX_GLUE_SECTION_NAME
);
5575 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5576 returns the symbol identifying the stub. */
5578 static struct elf_link_hash_entry
*
5579 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
5580 struct elf_link_hash_entry
* h
)
5582 const char * name
= h
->root
.root
.string
;
5585 struct elf_link_hash_entry
* myh
;
5586 struct bfd_link_hash_entry
* bh
;
5587 struct elf32_arm_link_hash_table
* globals
;
5591 globals
= elf32_arm_hash_table (link_info
);
5592 BFD_ASSERT (globals
!= NULL
);
5593 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5595 s
= bfd_get_section_by_name
5596 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
5598 BFD_ASSERT (s
!= NULL
);
5600 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5601 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5603 BFD_ASSERT (tmp_name
);
5605 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5607 myh
= elf_link_hash_lookup
5608 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5612 /* We've already seen this guy. */
5617 /* The only trick here is using hash_table->arm_glue_size as the value.
5618 Even though the section isn't allocated yet, this is where we will be
5619 putting it. The +1 on the value marks that the stub has not been
5620 output yet - not that it is a Thumb function. */
5622 val
= globals
->arm_glue_size
+ 1;
5623 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5624 tmp_name
, BSF_GLOBAL
, s
, val
,
5625 NULL
, TRUE
, FALSE
, &bh
);
5627 myh
= (struct elf_link_hash_entry
*) bh
;
5628 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5629 myh
->forced_local
= 1;
5633 if (link_info
->shared
|| globals
->root
.is_relocatable_executable
5634 || globals
->pic_veneer
)
5635 size
= ARM2THUMB_PIC_GLUE_SIZE
;
5636 else if (globals
->use_blx
)
5637 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
5639 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
5642 globals
->arm_glue_size
+= size
;
5647 /* Allocate space for ARMv4 BX veneers. */
5650 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
5653 struct elf32_arm_link_hash_table
*globals
;
5655 struct elf_link_hash_entry
*myh
;
5656 struct bfd_link_hash_entry
*bh
;
5659 /* BX PC does not need a veneer. */
5663 globals
= elf32_arm_hash_table (link_info
);
5664 BFD_ASSERT (globals
!= NULL
);
5665 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5667 /* Check if this veneer has already been allocated. */
5668 if (globals
->bx_glue_offset
[reg
])
5671 s
= bfd_get_section_by_name
5672 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
5674 BFD_ASSERT (s
!= NULL
);
5676 /* Add symbol for veneer. */
5678 bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
5680 BFD_ASSERT (tmp_name
);
5682 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
5684 myh
= elf_link_hash_lookup
5685 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5687 BFD_ASSERT (myh
== NULL
);
5690 val
= globals
->bx_glue_size
;
5691 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5692 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5693 NULL
, TRUE
, FALSE
, &bh
);
5695 myh
= (struct elf_link_hash_entry
*) bh
;
5696 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5697 myh
->forced_local
= 1;
5699 s
->size
+= ARM_BX_VENEER_SIZE
;
5700 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
5701 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
5705 /* Add an entry to the code/data map for section SEC. */
5708 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
5710 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
5711 unsigned int newidx
;
5713 if (sec_data
->map
== NULL
)
5715 sec_data
->map
= (elf32_arm_section_map
*)
5716 bfd_malloc (sizeof (elf32_arm_section_map
));
5717 sec_data
->mapcount
= 0;
5718 sec_data
->mapsize
= 1;
5721 newidx
= sec_data
->mapcount
++;
5723 if (sec_data
->mapcount
> sec_data
->mapsize
)
5725 sec_data
->mapsize
*= 2;
5726 sec_data
->map
= (elf32_arm_section_map
*)
5727 bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
5728 * sizeof (elf32_arm_section_map
));
5733 sec_data
->map
[newidx
].vma
= vma
;
5734 sec_data
->map
[newidx
].type
= type
;
5739 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5740 veneers are handled for now. */
5743 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
5744 elf32_vfp11_erratum_list
*branch
,
5746 asection
*branch_sec
,
5747 unsigned int offset
)
5750 struct elf32_arm_link_hash_table
*hash_table
;
5752 struct elf_link_hash_entry
*myh
;
5753 struct bfd_link_hash_entry
*bh
;
5755 struct _arm_elf_section_data
*sec_data
;
5756 elf32_vfp11_erratum_list
*newerr
;
5758 hash_table
= elf32_arm_hash_table (link_info
);
5759 BFD_ASSERT (hash_table
!= NULL
);
5760 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
5762 s
= bfd_get_section_by_name
5763 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
5765 sec_data
= elf32_arm_section_data (s
);
5767 BFD_ASSERT (s
!= NULL
);
5769 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
5770 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
5772 BFD_ASSERT (tmp_name
);
5774 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
5775 hash_table
->num_vfp11_fixes
);
5777 myh
= elf_link_hash_lookup
5778 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5780 BFD_ASSERT (myh
== NULL
);
5783 val
= hash_table
->vfp11_erratum_glue_size
;
5784 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
5785 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5786 NULL
, TRUE
, FALSE
, &bh
);
5788 myh
= (struct elf_link_hash_entry
*) bh
;
5789 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5790 myh
->forced_local
= 1;
5792 /* Link veneer back to calling location. */
5793 sec_data
->erratumcount
+= 1;
5794 newerr
= (elf32_vfp11_erratum_list
*)
5795 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5797 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
5799 newerr
->u
.v
.branch
= branch
;
5800 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
5801 branch
->u
.b
.veneer
= newerr
;
5803 newerr
->next
= sec_data
->erratumlist
;
5804 sec_data
->erratumlist
= newerr
;
5806 /* A symbol for the return from the veneer. */
5807 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
5808 hash_table
->num_vfp11_fixes
);
5810 myh
= elf_link_hash_lookup
5811 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5818 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
5819 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
5821 myh
= (struct elf_link_hash_entry
*) bh
;
5822 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5823 myh
->forced_local
= 1;
5827 /* Generate a mapping symbol for the veneer section, and explicitly add an
5828 entry for that symbol to the code/data map for the section. */
5829 if (hash_table
->vfp11_erratum_glue_size
== 0)
5832 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5833 ever requires this erratum fix. */
5834 _bfd_generic_link_add_one_symbol (link_info
,
5835 hash_table
->bfd_of_glue_owner
, "$a",
5836 BSF_LOCAL
, s
, 0, NULL
,
5839 myh
= (struct elf_link_hash_entry
*) bh
;
5840 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
5841 myh
->forced_local
= 1;
5843 /* The elf32_arm_init_maps function only cares about symbols from input
5844 BFDs. We must make a note of this generated mapping symbol
5845 ourselves so that code byteswapping works properly in
5846 elf32_arm_write_section. */
5847 elf32_arm_section_map_add (s
, 'a', 0);
5850 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
5851 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
5852 hash_table
->num_vfp11_fixes
++;
5854 /* The offset of the veneer. */
5858 #define ARM_GLUE_SECTION_FLAGS \
5859 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
5860 | SEC_READONLY | SEC_LINKER_CREATED)
5862 /* Create a fake section for use by the ARM backend of the linker. */
5865 arm_make_glue_section (bfd
* abfd
, const char * name
)
5869 sec
= bfd_get_section_by_name (abfd
, name
);
5874 sec
= bfd_make_section_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
5877 || !bfd_set_section_alignment (abfd
, sec
, 2))
5880 /* Set the gc mark to prevent the section from being removed by garbage
5881 collection, despite the fact that no relocs refer to this section. */
5887 /* Add the glue sections to ABFD. This function is called from the
5888 linker scripts in ld/emultempl/{armelf}.em. */
5891 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
5892 struct bfd_link_info
*info
)
5894 /* If we are only performing a partial
5895 link do not bother adding the glue. */
5896 if (info
->relocatable
)
5899 return arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
5900 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
5901 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
5902 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
5905 /* Select a BFD to be used to hold the sections used by the glue code.
5906 This function is called from the linker scripts in ld/emultempl/
5910 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
5912 struct elf32_arm_link_hash_table
*globals
;
5914 /* If we are only performing a partial link
5915 do not bother getting a bfd to hold the glue. */
5916 if (info
->relocatable
)
5919 /* Make sure we don't attach the glue sections to a dynamic object. */
5920 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
5922 globals
= elf32_arm_hash_table (info
);
5923 BFD_ASSERT (globals
!= NULL
);
5925 if (globals
->bfd_of_glue_owner
!= NULL
)
5928 /* Save the bfd for later use. */
5929 globals
->bfd_of_glue_owner
= abfd
;
5935 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
5939 cpu_arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
5942 if (globals
->fix_arm1176
)
5944 if (cpu_arch
== TAG_CPU_ARCH_V6T2
|| cpu_arch
> TAG_CPU_ARCH_V6K
)
5945 globals
->use_blx
= 1;
5949 if (cpu_arch
> TAG_CPU_ARCH_V4T
)
5950 globals
->use_blx
= 1;
5955 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
5956 struct bfd_link_info
*link_info
)
5958 Elf_Internal_Shdr
*symtab_hdr
;
5959 Elf_Internal_Rela
*internal_relocs
= NULL
;
5960 Elf_Internal_Rela
*irel
, *irelend
;
5961 bfd_byte
*contents
= NULL
;
5964 struct elf32_arm_link_hash_table
*globals
;
5966 /* If we are only performing a partial link do not bother
5967 to construct any glue. */
5968 if (link_info
->relocatable
)
5971 /* Here we have a bfd that is to be included on the link. We have a
5972 hook to do reloc rummaging, before section sizes are nailed down. */
5973 globals
= elf32_arm_hash_table (link_info
);
5974 BFD_ASSERT (globals
!= NULL
);
5976 check_use_blx (globals
);
5978 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
5980 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
5985 /* PR 5398: If we have not decided to include any loadable sections in
5986 the output then we will not have a glue owner bfd. This is OK, it
5987 just means that there is nothing else for us to do here. */
5988 if (globals
->bfd_of_glue_owner
== NULL
)
5991 /* Rummage around all the relocs and map the glue vectors. */
5992 sec
= abfd
->sections
;
5997 for (; sec
!= NULL
; sec
= sec
->next
)
5999 if (sec
->reloc_count
== 0)
6002 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
6005 symtab_hdr
= & elf_symtab_hdr (abfd
);
6007 /* Load the relocs. */
6009 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
6011 if (internal_relocs
== NULL
)
6014 irelend
= internal_relocs
+ sec
->reloc_count
;
6015 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
6018 unsigned long r_index
;
6020 struct elf_link_hash_entry
*h
;
6022 r_type
= ELF32_R_TYPE (irel
->r_info
);
6023 r_index
= ELF32_R_SYM (irel
->r_info
);
6025 /* These are the only relocation types we care about. */
6026 if ( r_type
!= R_ARM_PC24
6027 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
6030 /* Get the section contents if we haven't done so already. */
6031 if (contents
== NULL
)
6033 /* Get cached copy if it exists. */
6034 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6035 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6038 /* Go get them off disk. */
6039 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6044 if (r_type
== R_ARM_V4BX
)
6048 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
6049 record_arm_bx_glue (link_info
, reg
);
6053 /* If the relocation is not against a symbol it cannot concern us. */
6056 /* We don't care about local symbols. */
6057 if (r_index
< symtab_hdr
->sh_info
)
6060 /* This is an external symbol. */
6061 r_index
-= symtab_hdr
->sh_info
;
6062 h
= (struct elf_link_hash_entry
*)
6063 elf_sym_hashes (abfd
)[r_index
];
6065 /* If the relocation is against a static symbol it must be within
6066 the current section and so cannot be a cross ARM/Thumb relocation. */
6070 /* If the call will go through a PLT entry then we do not need
6072 if (globals
->root
.splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
6078 /* This one is a call from arm code. We need to look up
6079 the target of the call. If it is a thumb target, we
6081 if (h
->target_internal
== ST_BRANCH_TO_THUMB
)
6082 record_arm_to_thumb_glue (link_info
, h
);
6090 if (contents
!= NULL
6091 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6095 if (internal_relocs
!= NULL
6096 && elf_section_data (sec
)->relocs
!= internal_relocs
)
6097 free (internal_relocs
);
6098 internal_relocs
= NULL
;
6104 if (contents
!= NULL
6105 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6107 if (internal_relocs
!= NULL
6108 && elf_section_data (sec
)->relocs
!= internal_relocs
)
6109 free (internal_relocs
);
6116 /* Initialise maps of ARM/Thumb/data for input BFDs. */
6119 bfd_elf32_arm_init_maps (bfd
*abfd
)
6121 Elf_Internal_Sym
*isymbuf
;
6122 Elf_Internal_Shdr
*hdr
;
6123 unsigned int i
, localsyms
;
6125 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
6126 if (! is_arm_elf (abfd
))
6129 if ((abfd
->flags
& DYNAMIC
) != 0)
6132 hdr
= & elf_symtab_hdr (abfd
);
6133 localsyms
= hdr
->sh_info
;
6135 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
6136 should contain the number of local symbols, which should come before any
6137 global symbols. Mapping symbols are always local. */
6138 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
6141 /* No internal symbols read? Skip this BFD. */
6142 if (isymbuf
== NULL
)
6145 for (i
= 0; i
< localsyms
; i
++)
6147 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
6148 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
6152 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
6154 name
= bfd_elf_string_from_elf_section (abfd
,
6155 hdr
->sh_link
, isym
->st_name
);
6157 if (bfd_is_arm_special_symbol_name (name
,
6158 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
6159 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
6165 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
6166 say what they wanted. */
6169 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
6171 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6172 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
6174 if (globals
== NULL
)
6177 if (globals
->fix_cortex_a8
== -1)
6179 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
6180 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
6181 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
6182 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
6183 globals
->fix_cortex_a8
= 1;
6185 globals
->fix_cortex_a8
= 0;
6191 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
6193 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6194 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
6196 if (globals
== NULL
)
6198 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
6199 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
6201 switch (globals
->vfp11_fix
)
6203 case BFD_ARM_VFP11_FIX_DEFAULT
:
6204 case BFD_ARM_VFP11_FIX_NONE
:
6205 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
6209 /* Give a warning, but do as the user requests anyway. */
6210 (*_bfd_error_handler
) (_("%B: warning: selected VFP11 erratum "
6211 "workaround is not necessary for target architecture"), obfd
);
6214 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
6215 /* For earlier architectures, we might need the workaround, but do not
6216 enable it by default. If users is running with broken hardware, they
6217 must enable the erratum fix explicitly. */
6218 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
6222 enum bfd_arm_vfp11_pipe
6230 /* Return a VFP register number. This is encoded as RX:X for single-precision
6231 registers, or X:RX for double-precision registers, where RX is the group of
6232 four bits in the instruction encoding and X is the single extension bit.
6233 RX and X fields are specified using their lowest (starting) bit. The return
6236 0...31: single-precision registers s0...s31
6237 32...63: double-precision registers d0...d31.
6239 Although X should be zero for VFP11 (encoding d0...d15 only), we might
6240 encounter VFP3 instructions, so we allow the full range for DP registers. */
6243 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
6247 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
6249 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
6252 /* Set bits in *WMASK according to a register number REG as encoded by
6253 bfd_arm_vfp11_regno(). Ignore d16-d31. */
6256 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
6261 *wmask
|= 3 << ((reg
- 32) * 2);
6264 /* Return TRUE if WMASK overwrites anything in REGS. */
6267 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
6271 for (i
= 0; i
< numregs
; i
++)
6273 unsigned int reg
= regs
[i
];
6275 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
6283 if ((wmask
& (3 << (reg
* 2))) != 0)
6290 /* In this function, we're interested in two things: finding input registers
6291 for VFP data-processing instructions, and finding the set of registers which
6292 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
6293 hold the written set, so FLDM etc. are easy to deal with (we're only
6294 interested in 32 SP registers or 16 dp registers, due to the VFP version
6295 implemented by the chip in question). DP registers are marked by setting
6296 both SP registers in the write mask). */
6298 static enum bfd_arm_vfp11_pipe
6299 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
6302 enum bfd_arm_vfp11_pipe vpipe
= VFP11_BAD
;
6303 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
6305 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
6308 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
6309 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
6311 pqrs
= ((insn
& 0x00800000) >> 20)
6312 | ((insn
& 0x00300000) >> 19)
6313 | ((insn
& 0x00000040) >> 6);
6317 case 0: /* fmac[sd]. */
6318 case 1: /* fnmac[sd]. */
6319 case 2: /* fmsc[sd]. */
6320 case 3: /* fnmsc[sd]. */
6322 bfd_arm_vfp11_write_mask (destmask
, fd
);
6324 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
6329 case 4: /* fmul[sd]. */
6330 case 5: /* fnmul[sd]. */
6331 case 6: /* fadd[sd]. */
6332 case 7: /* fsub[sd]. */
6336 case 8: /* fdiv[sd]. */
6339 bfd_arm_vfp11_write_mask (destmask
, fd
);
6340 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
6345 case 15: /* extended opcode. */
6347 unsigned int extn
= ((insn
>> 15) & 0x1e)
6348 | ((insn
>> 7) & 1);
6352 case 0: /* fcpy[sd]. */
6353 case 1: /* fabs[sd]. */
6354 case 2: /* fneg[sd]. */
6355 case 8: /* fcmp[sd]. */
6356 case 9: /* fcmpe[sd]. */
6357 case 10: /* fcmpz[sd]. */
6358 case 11: /* fcmpez[sd]. */
6359 case 16: /* fuito[sd]. */
6360 case 17: /* fsito[sd]. */
6361 case 24: /* ftoui[sd]. */
6362 case 25: /* ftouiz[sd]. */
6363 case 26: /* ftosi[sd]. */
6364 case 27: /* ftosiz[sd]. */
6365 /* These instructions will not bounce due to underflow. */
6370 case 3: /* fsqrt[sd]. */
6371 /* fsqrt cannot underflow, but it can (perhaps) overwrite
6372 registers to cause the erratum in previous instructions. */
6373 bfd_arm_vfp11_write_mask (destmask
, fd
);
6377 case 15: /* fcvt{ds,sd}. */
6381 bfd_arm_vfp11_write_mask (destmask
, fd
);
6383 /* Only FCVTSD can underflow. */
6384 if ((insn
& 0x100) != 0)
6403 /* Two-register transfer. */
6404 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
6406 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
6408 if ((insn
& 0x100000) == 0)
6411 bfd_arm_vfp11_write_mask (destmask
, fm
);
6414 bfd_arm_vfp11_write_mask (destmask
, fm
);
6415 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
6421 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
6423 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
6424 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
6428 case 0: /* Two-reg transfer. We should catch these above. */
6431 case 2: /* fldm[sdx]. */
6435 unsigned int i
, offset
= insn
& 0xff;
6440 for (i
= fd
; i
< fd
+ offset
; i
++)
6441 bfd_arm_vfp11_write_mask (destmask
, i
);
6445 case 4: /* fld[sd]. */
6447 bfd_arm_vfp11_write_mask (destmask
, fd
);
6456 /* Single-register transfer. Note L==0. */
6457 else if ((insn
& 0x0f100e10) == 0x0e000a10)
6459 unsigned int opcode
= (insn
>> 21) & 7;
6460 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
6464 case 0: /* fmsr/fmdlr. */
6465 case 1: /* fmdhr. */
6466 /* Mark fmdhr and fmdlr as writing to the whole of the DP
6467 destination register. I don't know if this is exactly right,
6468 but it is the conservative choice. */
6469 bfd_arm_vfp11_write_mask (destmask
, fn
);
6483 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
6486 /* Look for potentially-troublesome code sequences which might trigger the
6487 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
6488 (available from ARM) for details of the erratum. A short version is
6489 described in ld.texinfo. */
6492 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
6495 bfd_byte
*contents
= NULL
;
6497 int regs
[3], numregs
= 0;
6498 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6499 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
6501 if (globals
== NULL
)
6504 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
6505 The states transition as follows:
6507 0 -> 1 (vector) or 0 -> 2 (scalar)
6508 A VFP FMAC-pipeline instruction has been seen. Fill
6509 regs[0]..regs[numregs-1] with its input operands. Remember this
6510 instruction in 'first_fmac'.
6513 Any instruction, except for a VFP instruction which overwrites
6518 A VFP instruction has been seen which overwrites any of regs[*].
6519 We must make a veneer! Reset state to 0 before examining next
6523 If we fail to match anything in state 2, reset to state 0 and reset
6524 the instruction pointer to the instruction after 'first_fmac'.
6526 If the VFP11 vector mode is in use, there must be at least two unrelated
6527 instructions between anti-dependent VFP11 instructions to properly avoid
6528 triggering the erratum, hence the use of the extra state 1. */
6530 /* If we are only performing a partial link do not bother
6531 to construct any glue. */
6532 if (link_info
->relocatable
)
6535 /* Skip if this bfd does not correspond to an ELF image. */
6536 if (! is_arm_elf (abfd
))
6539 /* We should have chosen a fix type by the time we get here. */
6540 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
6542 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
6545 /* Skip this BFD if it corresponds to an executable or dynamic object. */
6546 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
6549 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6551 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
6552 struct _arm_elf_section_data
*sec_data
;
6554 /* If we don't have executable progbits, we're not interested in this
6555 section. Also skip if section is to be excluded. */
6556 if (elf_section_type (sec
) != SHT_PROGBITS
6557 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
6558 || (sec
->flags
& SEC_EXCLUDE
) != 0
6559 || sec
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
6560 || sec
->output_section
== bfd_abs_section_ptr
6561 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
6564 sec_data
= elf32_arm_section_data (sec
);
6566 if (sec_data
->mapcount
== 0)
6569 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6570 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6571 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6574 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
6575 elf32_arm_compare_mapping
);
6577 for (span
= 0; span
< sec_data
->mapcount
; span
++)
6579 unsigned int span_start
= sec_data
->map
[span
].vma
;
6580 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
6581 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
6582 char span_type
= sec_data
->map
[span
].type
;
6584 /* FIXME: Only ARM mode is supported at present. We may need to
6585 support Thumb-2 mode also at some point. */
6586 if (span_type
!= 'a')
6589 for (i
= span_start
; i
< span_end
;)
6591 unsigned int next_i
= i
+ 4;
6592 unsigned int insn
= bfd_big_endian (abfd
)
6593 ? (contents
[i
] << 24)
6594 | (contents
[i
+ 1] << 16)
6595 | (contents
[i
+ 2] << 8)
6597 : (contents
[i
+ 3] << 24)
6598 | (contents
[i
+ 2] << 16)
6599 | (contents
[i
+ 1] << 8)
6601 unsigned int writemask
= 0;
6602 enum bfd_arm_vfp11_pipe vpipe
;
6607 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
6609 /* I'm assuming the VFP11 erratum can trigger with denorm
6610 operands on either the FMAC or the DS pipeline. This might
6611 lead to slightly overenthusiastic veneer insertion. */
6612 if (vpipe
== VFP11_FMAC
|| vpipe
== VFP11_DS
)
6614 state
= use_vector
? 1 : 2;
6616 veneer_of_insn
= insn
;
6622 int other_regs
[3], other_numregs
;
6623 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6626 if (vpipe
!= VFP11_BAD
6627 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6637 int other_regs
[3], other_numregs
;
6638 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6641 if (vpipe
!= VFP11_BAD
6642 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6648 next_i
= first_fmac
+ 4;
6654 abort (); /* Should be unreachable. */
6659 elf32_vfp11_erratum_list
*newerr
=(elf32_vfp11_erratum_list
*)
6660 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
6662 elf32_arm_section_data (sec
)->erratumcount
+= 1;
6664 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
6669 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
6676 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
6681 newerr
->next
= sec_data
->erratumlist
;
6682 sec_data
->erratumlist
= newerr
;
6691 if (contents
!= NULL
6692 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6700 if (contents
!= NULL
6701 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6707 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
6708 after sections have been laid out, using specially-named symbols. */
6711 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
6712 struct bfd_link_info
*link_info
)
6715 struct elf32_arm_link_hash_table
*globals
;
6718 if (link_info
->relocatable
)
6721 /* Skip if this bfd does not correspond to an ELF image. */
6722 if (! is_arm_elf (abfd
))
6725 globals
= elf32_arm_hash_table (link_info
);
6726 if (globals
== NULL
)
6729 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
6730 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
6732 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6734 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
6735 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
6737 for (; errnode
!= NULL
; errnode
= errnode
->next
)
6739 struct elf_link_hash_entry
*myh
;
6742 switch (errnode
->type
)
6744 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
6745 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
6746 /* Find veneer symbol. */
6747 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
6748 errnode
->u
.b
.veneer
->u
.v
.id
);
6750 myh
= elf_link_hash_lookup
6751 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6754 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6755 "`%s'"), abfd
, tmp_name
);
6757 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6758 + myh
->root
.u
.def
.section
->output_offset
6759 + myh
->root
.u
.def
.value
;
6761 errnode
->u
.b
.veneer
->vma
= vma
;
6764 case VFP11_ERRATUM_ARM_VENEER
:
6765 case VFP11_ERRATUM_THUMB_VENEER
:
6766 /* Find return location. */
6767 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
6770 myh
= elf_link_hash_lookup
6771 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6774 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6775 "`%s'"), abfd
, tmp_name
);
6777 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6778 + myh
->root
.u
.def
.section
->output_offset
6779 + myh
->root
.u
.def
.value
;
6781 errnode
->u
.v
.branch
->vma
= vma
;
6794 /* Set target relocation values needed during linking. */
6797 bfd_elf32_arm_set_target_relocs (struct bfd
*output_bfd
,
6798 struct bfd_link_info
*link_info
,
6800 char * target2_type
,
6803 bfd_arm_vfp11_fix vfp11_fix
,
6804 int no_enum_warn
, int no_wchar_warn
,
6805 int pic_veneer
, int fix_cortex_a8
,
6808 struct elf32_arm_link_hash_table
*globals
;
6810 globals
= elf32_arm_hash_table (link_info
);
6811 if (globals
== NULL
)
6814 globals
->target1_is_rel
= target1_is_rel
;
6815 if (strcmp (target2_type
, "rel") == 0)
6816 globals
->target2_reloc
= R_ARM_REL32
;
6817 else if (strcmp (target2_type
, "abs") == 0)
6818 globals
->target2_reloc
= R_ARM_ABS32
;
6819 else if (strcmp (target2_type
, "got-rel") == 0)
6820 globals
->target2_reloc
= R_ARM_GOT_PREL
;
6823 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6826 globals
->fix_v4bx
= fix_v4bx
;
6827 globals
->use_blx
|= use_blx
;
6828 globals
->vfp11_fix
= vfp11_fix
;
6829 globals
->pic_veneer
= pic_veneer
;
6830 globals
->fix_cortex_a8
= fix_cortex_a8
;
6831 globals
->fix_arm1176
= fix_arm1176
;
6833 BFD_ASSERT (is_arm_elf (output_bfd
));
6834 elf_arm_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
6835 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
6838 /* Replace the target offset of a Thumb bl or b.w instruction. */
6841 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
6847 BFD_ASSERT ((offset
& 1) == 0);
6849 upper
= bfd_get_16 (abfd
, insn
);
6850 lower
= bfd_get_16 (abfd
, insn
+ 2);
6851 reloc_sign
= (offset
< 0) ? 1 : 0;
6852 upper
= (upper
& ~(bfd_vma
) 0x7ff)
6853 | ((offset
>> 12) & 0x3ff)
6854 | (reloc_sign
<< 10);
6855 lower
= (lower
& ~(bfd_vma
) 0x2fff)
6856 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
6857 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
6858 | ((offset
>> 1) & 0x7ff);
6859 bfd_put_16 (abfd
, upper
, insn
);
6860 bfd_put_16 (abfd
, lower
, insn
+ 2);
6863 /* Thumb code calling an ARM function. */
6866 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
6870 asection
* input_section
,
6871 bfd_byte
* hit_data
,
6874 bfd_signed_vma addend
,
6876 char **error_message
)
6880 long int ret_offset
;
6881 struct elf_link_hash_entry
* myh
;
6882 struct elf32_arm_link_hash_table
* globals
;
6884 myh
= find_thumb_glue (info
, name
, error_message
);
6888 globals
= elf32_arm_hash_table (info
);
6889 BFD_ASSERT (globals
!= NULL
);
6890 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6892 my_offset
= myh
->root
.u
.def
.value
;
6894 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
6895 THUMB2ARM_GLUE_SECTION_NAME
);
6897 BFD_ASSERT (s
!= NULL
);
6898 BFD_ASSERT (s
->contents
!= NULL
);
6899 BFD_ASSERT (s
->output_section
!= NULL
);
6901 if ((my_offset
& 0x01) == 0x01)
6904 && sym_sec
->owner
!= NULL
6905 && !INTERWORK_FLAG (sym_sec
->owner
))
6907 (*_bfd_error_handler
)
6908 (_("%B(%s): warning: interworking not enabled.\n"
6909 " first occurrence: %B: thumb call to arm"),
6910 sym_sec
->owner
, input_bfd
, name
);
6916 myh
->root
.u
.def
.value
= my_offset
;
6918 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
6919 s
->contents
+ my_offset
);
6921 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
6922 s
->contents
+ my_offset
+ 2);
6925 /* Address of destination of the stub. */
6926 ((bfd_signed_vma
) val
)
6928 /* Offset from the start of the current section
6929 to the start of the stubs. */
6931 /* Offset of the start of this stub from the start of the stubs. */
6933 /* Address of the start of the current section. */
6934 + s
->output_section
->vma
)
6935 /* The branch instruction is 4 bytes into the stub. */
6937 /* ARM branches work from the pc of the instruction + 8. */
6940 put_arm_insn (globals
, output_bfd
,
6941 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
6942 s
->contents
+ my_offset
+ 4);
6945 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
6947 /* Now go back and fix up the original BL insn to point to here. */
6949 /* Address of where the stub is located. */
6950 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
6951 /* Address of where the BL is located. */
6952 - (input_section
->output_section
->vma
+ input_section
->output_offset
6954 /* Addend in the relocation. */
6956 /* Biassing for PC-relative addressing. */
6959 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
6964 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
6966 static struct elf_link_hash_entry
*
6967 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
6974 char ** error_message
)
6977 long int ret_offset
;
6978 struct elf_link_hash_entry
* myh
;
6979 struct elf32_arm_link_hash_table
* globals
;
6981 myh
= find_arm_glue (info
, name
, error_message
);
6985 globals
= elf32_arm_hash_table (info
);
6986 BFD_ASSERT (globals
!= NULL
);
6987 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6989 my_offset
= myh
->root
.u
.def
.value
;
6991 if ((my_offset
& 0x01) == 0x01)
6994 && sym_sec
->owner
!= NULL
6995 && !INTERWORK_FLAG (sym_sec
->owner
))
6997 (*_bfd_error_handler
)
6998 (_("%B(%s): warning: interworking not enabled.\n"
6999 " first occurrence: %B: arm call to thumb"),
7000 sym_sec
->owner
, input_bfd
, name
);
7004 myh
->root
.u
.def
.value
= my_offset
;
7006 if (info
->shared
|| globals
->root
.is_relocatable_executable
7007 || globals
->pic_veneer
)
7009 /* For relocatable objects we can't use absolute addresses,
7010 so construct the address from a relative offset. */
7011 /* TODO: If the offset is small it's probably worth
7012 constructing the address with adds. */
7013 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
7014 s
->contents
+ my_offset
);
7015 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
7016 s
->contents
+ my_offset
+ 4);
7017 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
7018 s
->contents
+ my_offset
+ 8);
7019 /* Adjust the offset by 4 for the position of the add,
7020 and 8 for the pipeline offset. */
7021 ret_offset
= (val
- (s
->output_offset
7022 + s
->output_section
->vma
7025 bfd_put_32 (output_bfd
, ret_offset
,
7026 s
->contents
+ my_offset
+ 12);
7028 else if (globals
->use_blx
)
7030 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
7031 s
->contents
+ my_offset
);
7033 /* It's a thumb address. Add the low order bit. */
7034 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
7035 s
->contents
+ my_offset
+ 4);
7039 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
7040 s
->contents
+ my_offset
);
7042 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
7043 s
->contents
+ my_offset
+ 4);
7045 /* It's a thumb address. Add the low order bit. */
7046 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
7047 s
->contents
+ my_offset
+ 8);
7053 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
7058 /* Arm code calling a Thumb function. */
7061 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
7065 asection
* input_section
,
7066 bfd_byte
* hit_data
,
7069 bfd_signed_vma addend
,
7071 char **error_message
)
7073 unsigned long int tmp
;
7076 long int ret_offset
;
7077 struct elf_link_hash_entry
* myh
;
7078 struct elf32_arm_link_hash_table
* globals
;
7080 globals
= elf32_arm_hash_table (info
);
7081 BFD_ASSERT (globals
!= NULL
);
7082 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7084 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
7085 ARM2THUMB_GLUE_SECTION_NAME
);
7086 BFD_ASSERT (s
!= NULL
);
7087 BFD_ASSERT (s
->contents
!= NULL
);
7088 BFD_ASSERT (s
->output_section
!= NULL
);
7090 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
7091 sym_sec
, val
, s
, error_message
);
7095 my_offset
= myh
->root
.u
.def
.value
;
7096 tmp
= bfd_get_32 (input_bfd
, hit_data
);
7097 tmp
= tmp
& 0xFF000000;
7099 /* Somehow these are both 4 too far, so subtract 8. */
7100 ret_offset
= (s
->output_offset
7102 + s
->output_section
->vma
7103 - (input_section
->output_offset
7104 + input_section
->output_section
->vma
7108 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
7110 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
7115 /* Populate Arm stub for an exported Thumb function. */
7118 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
7120 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
7122 struct elf_link_hash_entry
* myh
;
7123 struct elf32_arm_link_hash_entry
*eh
;
7124 struct elf32_arm_link_hash_table
* globals
;
7127 char *error_message
;
7129 eh
= elf32_arm_hash_entry (h
);
7130 /* Allocate stubs for exported Thumb functions on v4t. */
7131 if (eh
->export_glue
== NULL
)
7134 globals
= elf32_arm_hash_table (info
);
7135 BFD_ASSERT (globals
!= NULL
);
7136 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7138 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
7139 ARM2THUMB_GLUE_SECTION_NAME
);
7140 BFD_ASSERT (s
!= NULL
);
7141 BFD_ASSERT (s
->contents
!= NULL
);
7142 BFD_ASSERT (s
->output_section
!= NULL
);
7144 sec
= eh
->export_glue
->root
.u
.def
.section
;
7146 BFD_ASSERT (sec
->output_section
!= NULL
);
7148 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
7149 + sec
->output_section
->vma
;
7151 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
7152 h
->root
.u
.def
.section
->owner
,
7153 globals
->obfd
, sec
, val
, s
,
7159 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
7162 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
7167 struct elf32_arm_link_hash_table
*globals
;
7169 globals
= elf32_arm_hash_table (info
);
7170 BFD_ASSERT (globals
!= NULL
);
7171 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7173 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
7174 ARM_BX_GLUE_SECTION_NAME
);
7175 BFD_ASSERT (s
!= NULL
);
7176 BFD_ASSERT (s
->contents
!= NULL
);
7177 BFD_ASSERT (s
->output_section
!= NULL
);
7179 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
7181 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
7183 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
7185 p
= s
->contents
+ glue_addr
;
7186 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
7187 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
7188 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
7189 globals
->bx_glue_offset
[reg
] |= 1;
7192 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
7195 /* Generate Arm stubs for exported Thumb symbols. */
7197 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
7198 struct bfd_link_info
*link_info
)
7200 struct elf32_arm_link_hash_table
* globals
;
7202 if (link_info
== NULL
)
7203 /* Ignore this if we are not called by the ELF backend linker. */
7206 globals
= elf32_arm_hash_table (link_info
);
7207 if (globals
== NULL
)
7210 /* If blx is available then exported Thumb symbols are OK and there is
7212 if (globals
->use_blx
)
7215 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
7219 /* Reserve space for COUNT dynamic relocations in relocation selection
7223 elf32_arm_allocate_dynrelocs (struct bfd_link_info
*info
, asection
*sreloc
,
7224 bfd_size_type count
)
7226 struct elf32_arm_link_hash_table
*htab
;
7228 htab
= elf32_arm_hash_table (info
);
7229 BFD_ASSERT (htab
->root
.dynamic_sections_created
);
7232 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
7235 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
7236 dynamic, the relocations should go in SRELOC, otherwise they should
7237 go in the special .rel.iplt section. */
7240 elf32_arm_allocate_irelocs (struct bfd_link_info
*info
, asection
*sreloc
,
7241 bfd_size_type count
)
7243 struct elf32_arm_link_hash_table
*htab
;
7245 htab
= elf32_arm_hash_table (info
);
7246 if (!htab
->root
.dynamic_sections_created
)
7247 htab
->root
.irelplt
->size
+= RELOC_SIZE (htab
) * count
;
7250 BFD_ASSERT (sreloc
!= NULL
);
7251 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
7255 /* Add relocation REL to the end of relocation section SRELOC. */
7258 elf32_arm_add_dynreloc (bfd
*output_bfd
, struct bfd_link_info
*info
,
7259 asection
*sreloc
, Elf_Internal_Rela
*rel
)
7262 struct elf32_arm_link_hash_table
*htab
;
7264 htab
= elf32_arm_hash_table (info
);
7265 if (!htab
->root
.dynamic_sections_created
7266 && ELF32_R_TYPE (rel
->r_info
) == R_ARM_IRELATIVE
)
7267 sreloc
= htab
->root
.irelplt
;
7270 loc
= sreloc
->contents
;
7271 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (htab
);
7272 if (sreloc
->reloc_count
* RELOC_SIZE (htab
) > sreloc
->size
)
7274 SWAP_RELOC_OUT (htab
) (output_bfd
, rel
, loc
);
7277 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
7278 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
7282 elf32_arm_allocate_plt_entry (struct bfd_link_info
*info
,
7283 bfd_boolean is_iplt_entry
,
7284 union gotplt_union
*root_plt
,
7285 struct arm_plt_info
*arm_plt
)
7287 struct elf32_arm_link_hash_table
*htab
;
7291 htab
= elf32_arm_hash_table (info
);
7295 splt
= htab
->root
.iplt
;
7296 sgotplt
= htab
->root
.igotplt
;
7298 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
7299 elf32_arm_allocate_irelocs (info
, htab
->root
.irelplt
, 1);
7303 splt
= htab
->root
.splt
;
7304 sgotplt
= htab
->root
.sgotplt
;
7306 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
7307 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
7309 /* If this is the first .plt entry, make room for the special
7311 if (splt
->size
== 0)
7312 splt
->size
+= htab
->plt_header_size
;
7315 /* Allocate the PLT entry itself, including any leading Thumb stub. */
7316 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
7317 splt
->size
+= PLT_THUMB_STUB_SIZE
;
7318 root_plt
->offset
= splt
->size
;
7319 splt
->size
+= htab
->plt_entry_size
;
7321 if (!htab
->symbian_p
)
7323 /* We also need to make an entry in the .got.plt section, which
7324 will be placed in the .got section by the linker script. */
7325 arm_plt
->got_offset
= sgotplt
->size
- 8 * htab
->num_tls_desc
;
7330 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
7331 the entry lives in .iplt and resolves to (*SYM_VALUE)().
7332 Otherwise, DYNINDX is the index of the symbol in the dynamic
7333 symbol table and SYM_VALUE is undefined.
7335 ROOT_PLT points to the offset of the PLT entry from the start of its
7336 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
7337 bookkeeping information. */
7340 elf32_arm_populate_plt_entry (bfd
*output_bfd
, struct bfd_link_info
*info
,
7341 union gotplt_union
*root_plt
,
7342 struct arm_plt_info
*arm_plt
,
7343 int dynindx
, bfd_vma sym_value
)
7345 struct elf32_arm_link_hash_table
*htab
;
7351 Elf_Internal_Rela rel
;
7352 bfd_vma plt_header_size
;
7353 bfd_vma got_header_size
;
7355 htab
= elf32_arm_hash_table (info
);
7357 /* Pick the appropriate sections and sizes. */
7360 splt
= htab
->root
.iplt
;
7361 sgot
= htab
->root
.igotplt
;
7362 srel
= htab
->root
.irelplt
;
7364 /* There are no reserved entries in .igot.plt, and no special
7365 first entry in .iplt. */
7366 got_header_size
= 0;
7367 plt_header_size
= 0;
7371 splt
= htab
->root
.splt
;
7372 sgot
= htab
->root
.sgotplt
;
7373 srel
= htab
->root
.srelplt
;
7375 got_header_size
= get_elf_backend_data (output_bfd
)->got_header_size
;
7376 plt_header_size
= htab
->plt_header_size
;
7378 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
7380 /* Fill in the entry in the procedure linkage table. */
7381 if (htab
->symbian_p
)
7383 BFD_ASSERT (dynindx
>= 0);
7384 put_arm_insn (htab
, output_bfd
,
7385 elf32_arm_symbian_plt_entry
[0],
7386 splt
->contents
+ root_plt
->offset
);
7387 bfd_put_32 (output_bfd
,
7388 elf32_arm_symbian_plt_entry
[1],
7389 splt
->contents
+ root_plt
->offset
+ 4);
7391 /* Fill in the entry in the .rel.plt section. */
7392 rel
.r_offset
= (splt
->output_section
->vma
7393 + splt
->output_offset
7394 + root_plt
->offset
+ 4);
7395 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_GLOB_DAT
);
7397 /* Get the index in the procedure linkage table which
7398 corresponds to this symbol. This is the index of this symbol
7399 in all the symbols for which we are making plt entries. The
7400 first entry in the procedure linkage table is reserved. */
7401 plt_index
= ((root_plt
->offset
- plt_header_size
)
7402 / htab
->plt_entry_size
);
7406 bfd_vma got_offset
, got_address
, plt_address
;
7407 bfd_vma got_displacement
, initial_got_entry
;
7410 BFD_ASSERT (sgot
!= NULL
);
7412 /* Get the offset into the .(i)got.plt table of the entry that
7413 corresponds to this function. */
7414 got_offset
= (arm_plt
->got_offset
& -2);
7416 /* Get the index in the procedure linkage table which
7417 corresponds to this symbol. This is the index of this symbol
7418 in all the symbols for which we are making plt entries.
7419 After the reserved .got.plt entries, all symbols appear in
7420 the same order as in .plt. */
7421 plt_index
= (got_offset
- got_header_size
) / 4;
7423 /* Calculate the address of the GOT entry. */
7424 got_address
= (sgot
->output_section
->vma
7425 + sgot
->output_offset
7428 /* ...and the address of the PLT entry. */
7429 plt_address
= (splt
->output_section
->vma
7430 + splt
->output_offset
7431 + root_plt
->offset
);
7433 ptr
= splt
->contents
+ root_plt
->offset
;
7434 if (htab
->vxworks_p
&& info
->shared
)
7439 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
7441 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
7443 val
|= got_address
- sgot
->output_section
->vma
;
7445 val
|= plt_index
* RELOC_SIZE (htab
);
7446 if (i
== 2 || i
== 5)
7447 bfd_put_32 (output_bfd
, val
, ptr
);
7449 put_arm_insn (htab
, output_bfd
, val
, ptr
);
7452 else if (htab
->vxworks_p
)
7457 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
7459 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
7463 val
|= 0xffffff & -((root_plt
->offset
+ i
* 4 + 8) >> 2);
7465 val
|= plt_index
* RELOC_SIZE (htab
);
7466 if (i
== 2 || i
== 5)
7467 bfd_put_32 (output_bfd
, val
, ptr
);
7469 put_arm_insn (htab
, output_bfd
, val
, ptr
);
7472 loc
= (htab
->srelplt2
->contents
7473 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
7475 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
7476 referencing the GOT for this PLT entry. */
7477 rel
.r_offset
= plt_address
+ 8;
7478 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
7479 rel
.r_addend
= got_offset
;
7480 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7481 loc
+= RELOC_SIZE (htab
);
7483 /* Create the R_ARM_ABS32 relocation referencing the
7484 beginning of the PLT for this GOT entry. */
7485 rel
.r_offset
= got_address
;
7486 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
7488 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7492 /* Calculate the displacement between the PLT slot and the
7493 entry in the GOT. The eight-byte offset accounts for the
7494 value produced by adding to pc in the first instruction
7496 got_displacement
= got_address
- (plt_address
+ 8);
7498 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
7500 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
7502 put_thumb_insn (htab
, output_bfd
,
7503 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
7504 put_thumb_insn (htab
, output_bfd
,
7505 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
7508 put_arm_insn (htab
, output_bfd
,
7509 elf32_arm_plt_entry
[0]
7510 | ((got_displacement
& 0x0ff00000) >> 20),
7512 put_arm_insn (htab
, output_bfd
,
7513 elf32_arm_plt_entry
[1]
7514 | ((got_displacement
& 0x000ff000) >> 12),
7516 put_arm_insn (htab
, output_bfd
,
7517 elf32_arm_plt_entry
[2]
7518 | (got_displacement
& 0x00000fff),
7520 #ifdef FOUR_WORD_PLT
7521 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3], ptr
+ 12);
7525 /* Fill in the entry in the .rel(a).(i)plt section. */
7526 rel
.r_offset
= got_address
;
7530 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
7531 The dynamic linker or static executable then calls SYM_VALUE
7532 to determine the correct run-time value of the .igot.plt entry. */
7533 rel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
7534 initial_got_entry
= sym_value
;
7538 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_JUMP_SLOT
);
7539 initial_got_entry
= (splt
->output_section
->vma
7540 + splt
->output_offset
);
7543 /* Fill in the entry in the global offset table. */
7544 bfd_put_32 (output_bfd
, initial_got_entry
,
7545 sgot
->contents
+ got_offset
);
7548 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
7549 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7552 /* Some relocations map to different relocations depending on the
7553 target. Return the real relocation. */
7556 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
7562 if (globals
->target1_is_rel
)
7568 return globals
->target2_reloc
;
7575 /* Return the base VMA address which should be subtracted from real addresses
7576 when resolving @dtpoff relocation.
7577 This is PT_TLS segment p_vaddr. */
7580 dtpoff_base (struct bfd_link_info
*info
)
7582 /* If tls_sec is NULL, we should have signalled an error already. */
7583 if (elf_hash_table (info
)->tls_sec
== NULL
)
7585 return elf_hash_table (info
)->tls_sec
->vma
;
7588 /* Return the relocation value for @tpoff relocation
7589 if STT_TLS virtual address is ADDRESS. */
7592 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
7594 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7597 /* If tls_sec is NULL, we should have signalled an error already. */
7598 if (htab
->tls_sec
== NULL
)
7600 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
7601 return address
- htab
->tls_sec
->vma
+ base
;
7604 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
7605 VALUE is the relocation value. */
7607 static bfd_reloc_status_type
7608 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
7611 return bfd_reloc_overflow
;
7613 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
7614 bfd_put_32 (abfd
, value
, data
);
7615 return bfd_reloc_ok
;
7618 /* Handle TLS relaxations. Relaxing is possible for symbols that use
7619 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
7620 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
7622 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
7623 is to then call final_link_relocate. Return other values in the
7626 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
7627 the pre-relaxed code. It would be nice if the relocs were updated
7628 to match the optimization. */
7630 static bfd_reloc_status_type
7631 elf32_arm_tls_relax (struct elf32_arm_link_hash_table
*globals
,
7632 bfd
*input_bfd
, asection
*input_sec
, bfd_byte
*contents
,
7633 Elf_Internal_Rela
*rel
, unsigned long is_local
)
7637 switch (ELF32_R_TYPE (rel
->r_info
))
7640 return bfd_reloc_notsupported
;
7642 case R_ARM_TLS_GOTDESC
:
7647 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
7649 insn
-= 5; /* THUMB */
7651 insn
-= 8; /* ARM */
7653 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
7654 return bfd_reloc_continue
;
7656 case R_ARM_THM_TLS_DESCSEQ
:
7658 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
);
7659 if ((insn
& 0xff78) == 0x4478) /* add rx, pc */
7663 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7665 else if ((insn
& 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
7669 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7672 bfd_put_16 (input_bfd
, insn
& 0xf83f, contents
+ rel
->r_offset
);
7674 else if ((insn
& 0xff87) == 0x4780) /* blx rx */
7678 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7681 bfd_put_16 (input_bfd
, 0x4600 | (insn
& 0x78),
7682 contents
+ rel
->r_offset
);
7686 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
7687 /* It's a 32 bit instruction, fetch the rest of it for
7688 error generation. */
7690 | bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 2);
7691 (*_bfd_error_handler
)
7692 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
7693 input_bfd
, input_sec
, (unsigned long)rel
->r_offset
, insn
);
7694 return bfd_reloc_notsupported
;
7698 case R_ARM_TLS_DESCSEQ
:
7700 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
7701 if ((insn
& 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
7705 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xffff),
7706 contents
+ rel
->r_offset
);
7708 else if ((insn
& 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
7712 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
7715 bfd_put_32 (input_bfd
, insn
& 0xfffff000,
7716 contents
+ rel
->r_offset
);
7718 else if ((insn
& 0xfffffff0) == 0xe12fff30) /* blx rx */
7722 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
7725 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xf),
7726 contents
+ rel
->r_offset
);
7730 (*_bfd_error_handler
)
7731 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
7732 input_bfd
, input_sec
, (unsigned long)rel
->r_offset
, insn
);
7733 return bfd_reloc_notsupported
;
7737 case R_ARM_TLS_CALL
:
7738 /* GD->IE relaxation, turn the instruction into 'nop' or
7739 'ldr r0, [pc,r0]' */
7740 insn
= is_local
? 0xe1a00000 : 0xe79f0000;
7741 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
7744 case R_ARM_THM_TLS_CALL
:
7745 /* GD->IE relaxation */
7747 /* add r0,pc; ldr r0, [r0] */
7749 else if (arch_has_thumb2_nop (globals
))
7756 bfd_put_16 (input_bfd
, insn
>> 16, contents
+ rel
->r_offset
);
7757 bfd_put_16 (input_bfd
, insn
& 0xffff, contents
+ rel
->r_offset
+ 2);
7760 return bfd_reloc_ok
;
7763 /* For a given value of n, calculate the value of G_n as required to
7764 deal with group relocations. We return it in the form of an
7765 encoded constant-and-rotation, together with the final residual. If n is
7766 specified as less than zero, then final_residual is filled with the
7767 input value and no further action is performed. */
7770 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
7774 bfd_vma encoded_g_n
= 0;
7775 bfd_vma residual
= value
; /* Also known as Y_n. */
7777 for (current_n
= 0; current_n
<= n
; current_n
++)
7781 /* Calculate which part of the value to mask. */
7788 /* Determine the most significant bit in the residual and
7789 align the resulting value to a 2-bit boundary. */
7790 for (msb
= 30; msb
>= 0; msb
-= 2)
7791 if (residual
& (3 << msb
))
7794 /* The desired shift is now (msb - 6), or zero, whichever
7801 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
7802 g_n
= residual
& (0xff << shift
);
7803 encoded_g_n
= (g_n
>> shift
)
7804 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
7806 /* Calculate the residual for the next time around. */
7810 *final_residual
= residual
;
7815 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
7816 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
7819 identify_add_or_sub (bfd_vma insn
)
7821 int opcode
= insn
& 0x1e00000;
7823 if (opcode
== 1 << 23) /* ADD */
7826 if (opcode
== 1 << 22) /* SUB */
7832 /* Perform a relocation as part of a final link. */
7834 static bfd_reloc_status_type
7835 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
7838 asection
* input_section
,
7839 bfd_byte
* contents
,
7840 Elf_Internal_Rela
* rel
,
7842 struct bfd_link_info
* info
,
7844 const char * sym_name
,
7845 unsigned char st_type
,
7846 enum arm_st_branch_type branch_type
,
7847 struct elf_link_hash_entry
* h
,
7848 bfd_boolean
* unresolved_reloc_p
,
7849 char ** error_message
)
7851 unsigned long r_type
= howto
->type
;
7852 unsigned long r_symndx
;
7853 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
7854 bfd_vma
* local_got_offsets
;
7855 bfd_vma
* local_tlsdesc_gotents
;
7858 asection
* sreloc
= NULL
;
7861 bfd_signed_vma signed_addend
;
7862 unsigned char dynreloc_st_type
;
7863 bfd_vma dynreloc_value
;
7864 struct elf32_arm_link_hash_table
* globals
;
7865 struct elf32_arm_link_hash_entry
*eh
;
7866 union gotplt_union
*root_plt
;
7867 struct arm_plt_info
*arm_plt
;
7869 bfd_vma gotplt_offset
;
7870 bfd_boolean has_iplt_entry
;
7872 globals
= elf32_arm_hash_table (info
);
7873 if (globals
== NULL
)
7874 return bfd_reloc_notsupported
;
7876 BFD_ASSERT (is_arm_elf (input_bfd
));
7878 /* Some relocation types map to different relocations depending on the
7879 target. We pick the right one here. */
7880 r_type
= arm_real_reloc_type (globals
, r_type
);
7882 /* It is possible to have linker relaxations on some TLS access
7883 models. Update our information here. */
7884 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
7886 if (r_type
!= howto
->type
)
7887 howto
= elf32_arm_howto_from_type (r_type
);
7889 /* If the start address has been set, then set the EF_ARM_HASENTRY
7890 flag. Setting this more than once is redundant, but the cost is
7891 not too high, and it keeps the code simple.
7893 The test is done here, rather than somewhere else, because the
7894 start address is only set just before the final link commences.
7896 Note - if the user deliberately sets a start address of 0, the
7897 flag will not be set. */
7898 if (bfd_get_start_address (output_bfd
) != 0)
7899 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
7901 eh
= (struct elf32_arm_link_hash_entry
*) h
;
7902 sgot
= globals
->root
.sgot
;
7903 local_got_offsets
= elf_local_got_offsets (input_bfd
);
7904 local_tlsdesc_gotents
= elf32_arm_local_tlsdesc_gotent (input_bfd
);
7906 if (globals
->root
.dynamic_sections_created
)
7907 srelgot
= globals
->root
.srelgot
;
7911 r_symndx
= ELF32_R_SYM (rel
->r_info
);
7913 if (globals
->use_rel
)
7915 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
7917 if (addend
& ((howto
->src_mask
+ 1) >> 1))
7920 signed_addend
&= ~ howto
->src_mask
;
7921 signed_addend
|= addend
;
7924 signed_addend
= addend
;
7927 addend
= signed_addend
= rel
->r_addend
;
7929 /* Record the symbol information that should be used in dynamic
7931 dynreloc_st_type
= st_type
;
7932 dynreloc_value
= value
;
7933 if (branch_type
== ST_BRANCH_TO_THUMB
)
7934 dynreloc_value
|= 1;
7936 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
7937 VALUE appropriately for relocations that we resolve at link time. */
7938 has_iplt_entry
= FALSE
;
7939 if (elf32_arm_get_plt_info (input_bfd
, eh
, r_symndx
, &root_plt
, &arm_plt
)
7940 && root_plt
->offset
!= (bfd_vma
) -1)
7942 plt_offset
= root_plt
->offset
;
7943 gotplt_offset
= arm_plt
->got_offset
;
7945 if (h
== NULL
|| eh
->is_iplt
)
7947 has_iplt_entry
= TRUE
;
7948 splt
= globals
->root
.iplt
;
7950 /* Populate .iplt entries here, because not all of them will
7951 be seen by finish_dynamic_symbol. The lower bit is set if
7952 we have already populated the entry. */
7957 elf32_arm_populate_plt_entry (output_bfd
, info
, root_plt
, arm_plt
,
7958 -1, dynreloc_value
);
7959 root_plt
->offset
|= 1;
7962 /* Static relocations always resolve to the .iplt entry. */
7964 value
= (splt
->output_section
->vma
7965 + splt
->output_offset
7967 branch_type
= ST_BRANCH_TO_ARM
;
7969 /* If there are non-call relocations that resolve to the .iplt
7970 entry, then all dynamic ones must too. */
7971 if (arm_plt
->noncall_refcount
!= 0)
7973 dynreloc_st_type
= st_type
;
7974 dynreloc_value
= value
;
7978 /* We populate the .plt entry in finish_dynamic_symbol. */
7979 splt
= globals
->root
.splt
;
7984 plt_offset
= (bfd_vma
) -1;
7985 gotplt_offset
= (bfd_vma
) -1;
7991 /* We don't need to find a value for this symbol. It's just a
7993 *unresolved_reloc_p
= FALSE
;
7994 return bfd_reloc_ok
;
7997 if (!globals
->vxworks_p
)
7998 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
8002 case R_ARM_ABS32_NOI
:
8004 case R_ARM_REL32_NOI
:
8010 /* Handle relocations which should use the PLT entry. ABS32/REL32
8011 will use the symbol's value, which may point to a PLT entry, but we
8012 don't need to handle that here. If we created a PLT entry, all
8013 branches in this object should go to it, except if the PLT is too
8014 far away, in which case a long branch stub should be inserted. */
8015 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
8016 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
8017 && r_type
!= R_ARM_CALL
8018 && r_type
!= R_ARM_JUMP24
8019 && r_type
!= R_ARM_PLT32
)
8020 && plt_offset
!= (bfd_vma
) -1)
8022 /* If we've created a .plt section, and assigned a PLT entry
8023 to this function, it must either be a STT_GNU_IFUNC reference
8024 or not be known to bind locally. In other cases, we should
8025 have cleared the PLT entry by now. */
8026 BFD_ASSERT (has_iplt_entry
|| !SYMBOL_CALLS_LOCAL (info
, h
));
8028 value
= (splt
->output_section
->vma
8029 + splt
->output_offset
8031 *unresolved_reloc_p
= FALSE
;
8032 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8033 contents
, rel
->r_offset
, value
,
8037 /* When generating a shared object or relocatable executable, these
8038 relocations are copied into the output file to be resolved at
8040 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
8041 && (input_section
->flags
& SEC_ALLOC
)
8042 && !(globals
->vxworks_p
8043 && strcmp (input_section
->output_section
->name
,
8045 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
8046 || !SYMBOL_CALLS_LOCAL (info
, h
))
8047 && (!strstr (input_section
->name
, STUB_SUFFIX
))
8049 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8050 || h
->root
.type
!= bfd_link_hash_undefweak
)
8051 && r_type
!= R_ARM_PC24
8052 && r_type
!= R_ARM_CALL
8053 && r_type
!= R_ARM_JUMP24
8054 && r_type
!= R_ARM_PREL31
8055 && r_type
!= R_ARM_PLT32
)
8057 Elf_Internal_Rela outrel
;
8058 bfd_boolean skip
, relocate
;
8060 *unresolved_reloc_p
= FALSE
;
8062 if (sreloc
== NULL
&& globals
->root
.dynamic_sections_created
)
8064 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
8065 ! globals
->use_rel
);
8068 return bfd_reloc_notsupported
;
8074 outrel
.r_addend
= addend
;
8076 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
8078 if (outrel
.r_offset
== (bfd_vma
) -1)
8080 else if (outrel
.r_offset
== (bfd_vma
) -2)
8081 skip
= TRUE
, relocate
= TRUE
;
8082 outrel
.r_offset
+= (input_section
->output_section
->vma
8083 + input_section
->output_offset
);
8086 memset (&outrel
, 0, sizeof outrel
);
8091 || !h
->def_regular
))
8092 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
8097 /* This symbol is local, or marked to become local. */
8098 BFD_ASSERT (r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
);
8099 if (globals
->symbian_p
)
8103 /* On Symbian OS, the data segment and text segement
8104 can be relocated independently. Therefore, we
8105 must indicate the segment to which this
8106 relocation is relative. The BPABI allows us to
8107 use any symbol in the right segment; we just use
8108 the section symbol as it is convenient. (We
8109 cannot use the symbol given by "h" directly as it
8110 will not appear in the dynamic symbol table.)
8112 Note that the dynamic linker ignores the section
8113 symbol value, so we don't subtract osec->vma
8114 from the emitted reloc addend. */
8116 osec
= sym_sec
->output_section
;
8118 osec
= input_section
->output_section
;
8119 symbol
= elf_section_data (osec
)->dynindx
;
8122 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
8124 if ((osec
->flags
& SEC_READONLY
) == 0
8125 && htab
->data_index_section
!= NULL
)
8126 osec
= htab
->data_index_section
;
8128 osec
= htab
->text_index_section
;
8129 symbol
= elf_section_data (osec
)->dynindx
;
8131 BFD_ASSERT (symbol
!= 0);
8134 /* On SVR4-ish systems, the dynamic loader cannot
8135 relocate the text and data segments independently,
8136 so the symbol does not matter. */
8138 if (dynreloc_st_type
== STT_GNU_IFUNC
)
8139 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
8140 to the .iplt entry. Instead, every non-call reference
8141 must use an R_ARM_IRELATIVE relocation to obtain the
8142 correct run-time address. */
8143 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_IRELATIVE
);
8145 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
8146 if (globals
->use_rel
)
8149 outrel
.r_addend
+= dynreloc_value
;
8152 elf32_arm_add_dynreloc (output_bfd
, info
, sreloc
, &outrel
);
8154 /* If this reloc is against an external symbol, we do not want to
8155 fiddle with the addend. Otherwise, we need to include the symbol
8156 value so that it becomes an addend for the dynamic reloc. */
8158 return bfd_reloc_ok
;
8160 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8161 contents
, rel
->r_offset
,
8162 dynreloc_value
, (bfd_vma
) 0);
8164 else switch (r_type
)
8167 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
8169 case R_ARM_XPC25
: /* Arm BLX instruction. */
8172 case R_ARM_PC24
: /* Arm B/BL instruction. */
8175 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
8177 if (r_type
== R_ARM_XPC25
)
8179 /* Check for Arm calling Arm function. */
8180 /* FIXME: Should we translate the instruction into a BL
8181 instruction instead ? */
8182 if (branch_type
!= ST_BRANCH_TO_THUMB
)
8183 (*_bfd_error_handler
)
8184 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
8186 h
? h
->root
.root
.string
: "(local)");
8188 else if (r_type
== R_ARM_PC24
)
8190 /* Check for Arm calling Thumb function. */
8191 if (branch_type
== ST_BRANCH_TO_THUMB
)
8193 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
8194 output_bfd
, input_section
,
8195 hit_data
, sym_sec
, rel
->r_offset
,
8196 signed_addend
, value
,
8198 return bfd_reloc_ok
;
8200 return bfd_reloc_dangerous
;
8204 /* Check if a stub has to be inserted because the
8205 destination is too far or we are changing mode. */
8206 if ( r_type
== R_ARM_CALL
8207 || r_type
== R_ARM_JUMP24
8208 || r_type
== R_ARM_PLT32
)
8210 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
8211 struct elf32_arm_link_hash_entry
*hash
;
8213 hash
= (struct elf32_arm_link_hash_entry
*) h
;
8214 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
8215 st_type
, &branch_type
,
8216 hash
, value
, sym_sec
,
8217 input_bfd
, sym_name
);
8219 if (stub_type
!= arm_stub_none
)
8221 /* The target is out of reach, so redirect the
8222 branch to the local stub for this function. */
8224 stub_entry
= elf32_arm_get_stub_entry (input_section
,
8228 if (stub_entry
!= NULL
)
8229 value
= (stub_entry
->stub_offset
8230 + stub_entry
->stub_sec
->output_offset
8231 + stub_entry
->stub_sec
->output_section
->vma
);
8235 /* If the call goes through a PLT entry, make sure to
8236 check distance to the right destination address. */
8237 if (plt_offset
!= (bfd_vma
) -1)
8239 value
= (splt
->output_section
->vma
8240 + splt
->output_offset
8242 *unresolved_reloc_p
= FALSE
;
8243 /* The PLT entry is in ARM mode, regardless of the
8245 branch_type
= ST_BRANCH_TO_ARM
;
8250 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
8252 S is the address of the symbol in the relocation.
8253 P is address of the instruction being relocated.
8254 A is the addend (extracted from the instruction) in bytes.
8256 S is held in 'value'.
8257 P is the base address of the section containing the
8258 instruction plus the offset of the reloc into that
8260 (input_section->output_section->vma +
8261 input_section->output_offset +
8263 A is the addend, converted into bytes, ie:
8266 Note: None of these operations have knowledge of the pipeline
8267 size of the processor, thus it is up to the assembler to
8268 encode this information into the addend. */
8269 value
-= (input_section
->output_section
->vma
8270 + input_section
->output_offset
);
8271 value
-= rel
->r_offset
;
8272 if (globals
->use_rel
)
8273 value
+= (signed_addend
<< howto
->size
);
8275 /* RELA addends do not have to be adjusted by howto->size. */
8276 value
+= signed_addend
;
8278 signed_addend
= value
;
8279 signed_addend
>>= howto
->rightshift
;
8281 /* A branch to an undefined weak symbol is turned into a jump to
8282 the next instruction unless a PLT entry will be created.
8283 Do the same for local undefined symbols (but not for STN_UNDEF).
8284 The jump to the next instruction is optimized as a NOP depending
8285 on the architecture. */
8286 if (h
? (h
->root
.type
== bfd_link_hash_undefweak
8287 && plt_offset
== (bfd_vma
) -1)
8288 : r_symndx
!= STN_UNDEF
&& bfd_is_und_section (sym_sec
))
8290 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000);
8292 if (arch_has_arm_nop (globals
))
8293 value
|= 0x0320f000;
8295 value
|= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
8299 /* Perform a signed range check. */
8300 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
8301 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
8302 return bfd_reloc_overflow
;
8304 addend
= (value
& 2);
8306 value
= (signed_addend
& howto
->dst_mask
)
8307 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
8309 if (r_type
== R_ARM_CALL
)
8311 /* Set the H bit in the BLX instruction. */
8312 if (branch_type
== ST_BRANCH_TO_THUMB
)
8317 value
&= ~(bfd_vma
)(1 << 24);
8320 /* Select the correct instruction (BL or BLX). */
8321 /* Only if we are not handling a BL to a stub. In this
8322 case, mode switching is performed by the stub. */
8323 if (branch_type
== ST_BRANCH_TO_THUMB
&& !stub_entry
)
8325 else if (stub_entry
|| branch_type
!= ST_BRANCH_UNKNOWN
)
8327 value
&= ~(bfd_vma
)(1 << 28);
8337 if (branch_type
== ST_BRANCH_TO_THUMB
)
8341 case R_ARM_ABS32_NOI
:
8347 if (branch_type
== ST_BRANCH_TO_THUMB
)
8349 value
-= (input_section
->output_section
->vma
8350 + input_section
->output_offset
+ rel
->r_offset
);
8353 case R_ARM_REL32_NOI
:
8355 value
-= (input_section
->output_section
->vma
8356 + input_section
->output_offset
+ rel
->r_offset
);
8360 value
-= (input_section
->output_section
->vma
8361 + input_section
->output_offset
+ rel
->r_offset
);
8362 value
+= signed_addend
;
8363 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
8365 /* Check for overflow. */
8366 if ((value
^ (value
>> 1)) & (1 << 30))
8367 return bfd_reloc_overflow
;
8369 value
&= 0x7fffffff;
8370 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
8371 if (branch_type
== ST_BRANCH_TO_THUMB
)
8376 bfd_put_32 (input_bfd
, value
, hit_data
);
8377 return bfd_reloc_ok
;
8382 /* There is no way to tell whether the user intended to use a signed or
8383 unsigned addend. When checking for overflow we accept either,
8384 as specified by the AAELF. */
8385 if ((long) value
> 0xff || (long) value
< -0x80)
8386 return bfd_reloc_overflow
;
8388 bfd_put_8 (input_bfd
, value
, hit_data
);
8389 return bfd_reloc_ok
;
8394 /* See comment for R_ARM_ABS8. */
8395 if ((long) value
> 0xffff || (long) value
< -0x8000)
8396 return bfd_reloc_overflow
;
8398 bfd_put_16 (input_bfd
, value
, hit_data
);
8399 return bfd_reloc_ok
;
8401 case R_ARM_THM_ABS5
:
8402 /* Support ldr and str instructions for the thumb. */
8403 if (globals
->use_rel
)
8405 /* Need to refetch addend. */
8406 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
8407 /* ??? Need to determine shift amount from operand size. */
8408 addend
>>= howto
->rightshift
;
8412 /* ??? Isn't value unsigned? */
8413 if ((long) value
> 0x1f || (long) value
< -0x10)
8414 return bfd_reloc_overflow
;
8416 /* ??? Value needs to be properly shifted into place first. */
8417 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
8418 bfd_put_16 (input_bfd
, value
, hit_data
);
8419 return bfd_reloc_ok
;
8421 case R_ARM_THM_ALU_PREL_11_0
:
8422 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
8425 bfd_signed_vma relocation
;
8427 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
8428 | bfd_get_16 (input_bfd
, hit_data
+ 2);
8430 if (globals
->use_rel
)
8432 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
8433 | ((insn
& (1 << 26)) >> 15);
8434 if (insn
& 0xf00000)
8435 signed_addend
= -signed_addend
;
8438 relocation
= value
+ signed_addend
;
8439 relocation
-= (input_section
->output_section
->vma
8440 + input_section
->output_offset
8443 value
= abs (relocation
);
8445 if (value
>= 0x1000)
8446 return bfd_reloc_overflow
;
8448 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
8449 | ((value
& 0x700) << 4)
8450 | ((value
& 0x800) << 15);
8454 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8455 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8457 return bfd_reloc_ok
;
8461 /* PR 10073: This reloc is not generated by the GNU toolchain,
8462 but it is supported for compatibility with third party libraries
8463 generated by other compilers, specifically the ARM/IAR. */
8466 bfd_signed_vma relocation
;
8468 insn
= bfd_get_16 (input_bfd
, hit_data
);
8470 if (globals
->use_rel
)
8471 addend
= (insn
& 0x00ff) << 2;
8473 relocation
= value
+ addend
;
8474 relocation
-= (input_section
->output_section
->vma
8475 + input_section
->output_offset
8478 value
= abs (relocation
);
8480 /* We do not check for overflow of this reloc. Although strictly
8481 speaking this is incorrect, it appears to be necessary in order
8482 to work with IAR generated relocs. Since GCC and GAS do not
8483 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
8484 a problem for them. */
8487 insn
= (insn
& 0xff00) | (value
>> 2);
8489 bfd_put_16 (input_bfd
, insn
, hit_data
);
8491 return bfd_reloc_ok
;
8494 case R_ARM_THM_PC12
:
8495 /* Corresponds to: ldr.w reg, [pc, #offset]. */
8498 bfd_signed_vma relocation
;
8500 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
8501 | bfd_get_16 (input_bfd
, hit_data
+ 2);
8503 if (globals
->use_rel
)
8505 signed_addend
= insn
& 0xfff;
8506 if (!(insn
& (1 << 23)))
8507 signed_addend
= -signed_addend
;
8510 relocation
= value
+ signed_addend
;
8511 relocation
-= (input_section
->output_section
->vma
8512 + input_section
->output_offset
8515 value
= abs (relocation
);
8517 if (value
>= 0x1000)
8518 return bfd_reloc_overflow
;
8520 insn
= (insn
& 0xff7ff000) | value
;
8521 if (relocation
>= 0)
8524 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8525 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8527 return bfd_reloc_ok
;
8530 case R_ARM_THM_XPC22
:
8531 case R_ARM_THM_CALL
:
8532 case R_ARM_THM_JUMP24
:
8533 /* Thumb BL (branch long instruction). */
8537 bfd_boolean overflow
= FALSE
;
8538 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
8539 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
8540 bfd_signed_vma reloc_signed_max
;
8541 bfd_signed_vma reloc_signed_min
;
8543 bfd_signed_vma signed_check
;
8545 const int thumb2
= using_thumb2 (globals
);
8547 /* A branch to an undefined weak symbol is turned into a jump to
8548 the next instruction unless a PLT entry will be created.
8549 The jump to the next instruction is optimized as a NOP.W for
8550 Thumb-2 enabled architectures. */
8551 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
8552 && plt_offset
== (bfd_vma
) -1)
8554 if (arch_has_thumb2_nop (globals
))
8556 bfd_put_16 (input_bfd
, 0xf3af, hit_data
);
8557 bfd_put_16 (input_bfd
, 0x8000, hit_data
+ 2);
8561 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
8562 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
8564 return bfd_reloc_ok
;
8567 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
8568 with Thumb-1) involving the J1 and J2 bits. */
8569 if (globals
->use_rel
)
8571 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
8572 bfd_vma upper
= upper_insn
& 0x3ff;
8573 bfd_vma lower
= lower_insn
& 0x7ff;
8574 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
8575 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
8576 bfd_vma i1
= j1
^ s
? 0 : 1;
8577 bfd_vma i2
= j2
^ s
? 0 : 1;
8579 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
8581 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
8583 signed_addend
= addend
;
8586 if (r_type
== R_ARM_THM_XPC22
)
8588 /* Check for Thumb to Thumb call. */
8589 /* FIXME: Should we translate the instruction into a BL
8590 instruction instead ? */
8591 if (branch_type
== ST_BRANCH_TO_THUMB
)
8592 (*_bfd_error_handler
)
8593 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
8595 h
? h
->root
.root
.string
: "(local)");
8599 /* If it is not a call to Thumb, assume call to Arm.
8600 If it is a call relative to a section name, then it is not a
8601 function call at all, but rather a long jump. Calls through
8602 the PLT do not require stubs. */
8603 if (branch_type
== ST_BRANCH_TO_ARM
&& plt_offset
== (bfd_vma
) -1)
8605 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
8607 /* Convert BL to BLX. */
8608 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8610 else if (( r_type
!= R_ARM_THM_CALL
)
8611 && (r_type
!= R_ARM_THM_JUMP24
))
8613 if (elf32_thumb_to_arm_stub
8614 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
8615 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
8617 return bfd_reloc_ok
;
8619 return bfd_reloc_dangerous
;
8622 else if (branch_type
== ST_BRANCH_TO_THUMB
8624 && r_type
== R_ARM_THM_CALL
)
8626 /* Make sure this is a BL. */
8627 lower_insn
|= 0x1800;
8631 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
8632 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
8634 /* Check if a stub has to be inserted because the destination
8636 struct elf32_arm_stub_hash_entry
*stub_entry
;
8637 struct elf32_arm_link_hash_entry
*hash
;
8639 hash
= (struct elf32_arm_link_hash_entry
*) h
;
8641 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
8642 st_type
, &branch_type
,
8643 hash
, value
, sym_sec
,
8644 input_bfd
, sym_name
);
8646 if (stub_type
!= arm_stub_none
)
8648 /* The target is out of reach or we are changing modes, so
8649 redirect the branch to the local stub for this
8651 stub_entry
= elf32_arm_get_stub_entry (input_section
,
8655 if (stub_entry
!= NULL
)
8656 value
= (stub_entry
->stub_offset
8657 + stub_entry
->stub_sec
->output_offset
8658 + stub_entry
->stub_sec
->output_section
->vma
);
8660 /* If this call becomes a call to Arm, force BLX. */
8661 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
8664 && !arm_stub_is_thumb (stub_entry
->stub_type
))
8665 || branch_type
!= ST_BRANCH_TO_THUMB
)
8666 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8671 /* Handle calls via the PLT. */
8672 if (stub_type
== arm_stub_none
&& plt_offset
!= (bfd_vma
) -1)
8674 value
= (splt
->output_section
->vma
8675 + splt
->output_offset
8678 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
8680 /* If the Thumb BLX instruction is available, convert
8681 the BL to a BLX instruction to call the ARM-mode
8683 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8684 branch_type
= ST_BRANCH_TO_ARM
;
8688 /* Target the Thumb stub before the ARM PLT entry. */
8689 value
-= PLT_THUMB_STUB_SIZE
;
8690 branch_type
= ST_BRANCH_TO_THUMB
;
8692 *unresolved_reloc_p
= FALSE
;
8695 relocation
= value
+ signed_addend
;
8697 relocation
-= (input_section
->output_section
->vma
8698 + input_section
->output_offset
8701 check
= relocation
>> howto
->rightshift
;
8703 /* If this is a signed value, the rightshift just dropped
8704 leading 1 bits (assuming twos complement). */
8705 if ((bfd_signed_vma
) relocation
>= 0)
8706 signed_check
= check
;
8708 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
8710 /* Calculate the permissable maximum and minimum values for
8711 this relocation according to whether we're relocating for
8713 bitsize
= howto
->bitsize
;
8716 reloc_signed_max
= (1 << (bitsize
- 1)) - 1;
8717 reloc_signed_min
= ~reloc_signed_max
;
8719 /* Assumes two's complement. */
8720 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
8723 if ((lower_insn
& 0x5000) == 0x4000)
8724 /* For a BLX instruction, make sure that the relocation is rounded up
8725 to a word boundary. This follows the semantics of the instruction
8726 which specifies that bit 1 of the target address will come from bit
8727 1 of the base address. */
8728 relocation
= (relocation
+ 2) & ~ 3;
8730 /* Put RELOCATION back into the insn. Assumes two's complement.
8731 We use the Thumb-2 encoding, which is safe even if dealing with
8732 a Thumb-1 instruction by virtue of our overflow check above. */
8733 reloc_sign
= (signed_check
< 0) ? 1 : 0;
8734 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
8735 | ((relocation
>> 12) & 0x3ff)
8736 | (reloc_sign
<< 10);
8737 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
8738 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
8739 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
8740 | ((relocation
>> 1) & 0x7ff);
8742 /* Put the relocated value back in the object file: */
8743 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
8744 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
8746 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
8750 case R_ARM_THM_JUMP19
:
8751 /* Thumb32 conditional branch instruction. */
8754 bfd_boolean overflow
= FALSE
;
8755 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
8756 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
8757 bfd_signed_vma reloc_signed_max
= 0xffffe;
8758 bfd_signed_vma reloc_signed_min
= -0x100000;
8759 bfd_signed_vma signed_check
;
8761 /* Need to refetch the addend, reconstruct the top three bits,
8762 and squish the two 11 bit pieces together. */
8763 if (globals
->use_rel
)
8765 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
8766 bfd_vma upper
= (upper_insn
& 0x003f);
8767 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
8768 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
8769 bfd_vma lower
= (lower_insn
& 0x07ff);
8774 upper
-= 0x0100; /* Sign extend. */
8776 addend
= (upper
<< 12) | (lower
<< 1);
8777 signed_addend
= addend
;
8780 /* Handle calls via the PLT. */
8781 if (plt_offset
!= (bfd_vma
) -1)
8783 value
= (splt
->output_section
->vma
8784 + splt
->output_offset
8786 /* Target the Thumb stub before the ARM PLT entry. */
8787 value
-= PLT_THUMB_STUB_SIZE
;
8788 *unresolved_reloc_p
= FALSE
;
8791 /* ??? Should handle interworking? GCC might someday try to
8792 use this for tail calls. */
8794 relocation
= value
+ signed_addend
;
8795 relocation
-= (input_section
->output_section
->vma
8796 + input_section
->output_offset
8798 signed_check
= (bfd_signed_vma
) relocation
;
8800 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
8803 /* Put RELOCATION back into the insn. */
8805 bfd_vma S
= (relocation
& 0x00100000) >> 20;
8806 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
8807 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
8808 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
8809 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
8811 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
8812 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
8815 /* Put the relocated value back in the object file: */
8816 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
8817 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
8819 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
8822 case R_ARM_THM_JUMP11
:
8823 case R_ARM_THM_JUMP8
:
8824 case R_ARM_THM_JUMP6
:
8825 /* Thumb B (branch) instruction). */
8827 bfd_signed_vma relocation
;
8828 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
8829 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
8830 bfd_signed_vma signed_check
;
8832 /* CZB cannot jump backward. */
8833 if (r_type
== R_ARM_THM_JUMP6
)
8834 reloc_signed_min
= 0;
8836 if (globals
->use_rel
)
8838 /* Need to refetch addend. */
8839 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
8840 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8843 signed_addend
&= ~ howto
->src_mask
;
8844 signed_addend
|= addend
;
8847 signed_addend
= addend
;
8848 /* The value in the insn has been right shifted. We need to
8849 undo this, so that we can perform the address calculation
8850 in terms of bytes. */
8851 signed_addend
<<= howto
->rightshift
;
8853 relocation
= value
+ signed_addend
;
8855 relocation
-= (input_section
->output_section
->vma
8856 + input_section
->output_offset
8859 relocation
>>= howto
->rightshift
;
8860 signed_check
= relocation
;
8862 if (r_type
== R_ARM_THM_JUMP6
)
8863 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
8865 relocation
&= howto
->dst_mask
;
8866 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
8868 bfd_put_16 (input_bfd
, relocation
, hit_data
);
8870 /* Assumes two's complement. */
8871 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
8872 return bfd_reloc_overflow
;
8874 return bfd_reloc_ok
;
8877 case R_ARM_ALU_PCREL7_0
:
8878 case R_ARM_ALU_PCREL15_8
:
8879 case R_ARM_ALU_PCREL23_15
:
8884 insn
= bfd_get_32 (input_bfd
, hit_data
);
8885 if (globals
->use_rel
)
8887 /* Extract the addend. */
8888 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
8889 signed_addend
= addend
;
8891 relocation
= value
+ signed_addend
;
8893 relocation
-= (input_section
->output_section
->vma
8894 + input_section
->output_offset
8896 insn
= (insn
& ~0xfff)
8897 | ((howto
->bitpos
<< 7) & 0xf00)
8898 | ((relocation
>> howto
->bitpos
) & 0xff);
8899 bfd_put_32 (input_bfd
, value
, hit_data
);
8901 return bfd_reloc_ok
;
8903 case R_ARM_GNU_VTINHERIT
:
8904 case R_ARM_GNU_VTENTRY
:
8905 return bfd_reloc_ok
;
8907 case R_ARM_GOTOFF32
:
8908 /* Relocation is relative to the start of the
8909 global offset table. */
8911 BFD_ASSERT (sgot
!= NULL
);
8913 return bfd_reloc_notsupported
;
8915 /* If we are addressing a Thumb function, we need to adjust the
8916 address by one, so that attempts to call the function pointer will
8917 correctly interpret it as Thumb code. */
8918 if (branch_type
== ST_BRANCH_TO_THUMB
)
8921 /* Note that sgot->output_offset is not involved in this
8922 calculation. We always want the start of .got. If we
8923 define _GLOBAL_OFFSET_TABLE in a different way, as is
8924 permitted by the ABI, we might have to change this
8926 value
-= sgot
->output_section
->vma
;
8927 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8928 contents
, rel
->r_offset
, value
,
8932 /* Use global offset table as symbol value. */
8933 BFD_ASSERT (sgot
!= NULL
);
8936 return bfd_reloc_notsupported
;
8938 *unresolved_reloc_p
= FALSE
;
8939 value
= sgot
->output_section
->vma
;
8940 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8941 contents
, rel
->r_offset
, value
,
8945 case R_ARM_GOT_PREL
:
8946 /* Relocation is to the entry for this symbol in the
8947 global offset table. */
8949 return bfd_reloc_notsupported
;
8951 if (dynreloc_st_type
== STT_GNU_IFUNC
8952 && plt_offset
!= (bfd_vma
) -1
8953 && (h
== NULL
|| SYMBOL_REFERENCES_LOCAL (info
, h
)))
8955 /* We have a relocation against a locally-binding STT_GNU_IFUNC
8956 symbol, and the relocation resolves directly to the runtime
8957 target rather than to the .iplt entry. This means that any
8958 .got entry would be the same value as the .igot.plt entry,
8959 so there's no point creating both. */
8960 sgot
= globals
->root
.igotplt
;
8961 value
= sgot
->output_offset
+ gotplt_offset
;
8967 off
= h
->got
.offset
;
8968 BFD_ASSERT (off
!= (bfd_vma
) -1);
8971 /* We have already processsed one GOT relocation against
8974 if (globals
->root
.dynamic_sections_created
8975 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
8976 *unresolved_reloc_p
= FALSE
;
8980 Elf_Internal_Rela outrel
;
8982 if (!SYMBOL_REFERENCES_LOCAL (info
, h
))
8984 /* If the symbol doesn't resolve locally in a static
8985 object, we have an undefined reference. If the
8986 symbol doesn't resolve locally in a dynamic object,
8987 it should be resolved by the dynamic linker. */
8988 if (globals
->root
.dynamic_sections_created
)
8990 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
8991 *unresolved_reloc_p
= FALSE
;
8995 outrel
.r_addend
= 0;
8999 if (dynreloc_st_type
== STT_GNU_IFUNC
)
9000 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9001 else if (info
->shared
)
9002 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
9005 outrel
.r_addend
= dynreloc_value
;
9008 /* The GOT entry is initialized to zero by default.
9009 See if we should install a different value. */
9010 if (outrel
.r_addend
!= 0
9011 && (outrel
.r_info
== 0 || globals
->use_rel
))
9013 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9014 sgot
->contents
+ off
);
9015 outrel
.r_addend
= 0;
9018 if (outrel
.r_info
!= 0)
9020 outrel
.r_offset
= (sgot
->output_section
->vma
9021 + sgot
->output_offset
9023 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9027 value
= sgot
->output_offset
+ off
;
9033 BFD_ASSERT (local_got_offsets
!= NULL
&&
9034 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
9036 off
= local_got_offsets
[r_symndx
];
9038 /* The offset must always be a multiple of 4. We use the
9039 least significant bit to record whether we have already
9040 generated the necessary reloc. */
9045 if (globals
->use_rel
)
9046 bfd_put_32 (output_bfd
, dynreloc_value
, sgot
->contents
+ off
);
9048 if (info
->shared
|| dynreloc_st_type
== STT_GNU_IFUNC
)
9050 Elf_Internal_Rela outrel
;
9052 outrel
.r_addend
= addend
+ dynreloc_value
;
9053 outrel
.r_offset
= (sgot
->output_section
->vma
9054 + sgot
->output_offset
9056 if (dynreloc_st_type
== STT_GNU_IFUNC
)
9057 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9059 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
9060 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9063 local_got_offsets
[r_symndx
] |= 1;
9066 value
= sgot
->output_offset
+ off
;
9068 if (r_type
!= R_ARM_GOT32
)
9069 value
+= sgot
->output_section
->vma
;
9071 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9072 contents
, rel
->r_offset
, value
,
9075 case R_ARM_TLS_LDO32
:
9076 value
= value
- dtpoff_base (info
);
9078 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9079 contents
, rel
->r_offset
, value
,
9082 case R_ARM_TLS_LDM32
:
9089 off
= globals
->tls_ldm_got
.offset
;
9095 /* If we don't know the module number, create a relocation
9099 Elf_Internal_Rela outrel
;
9101 if (srelgot
== NULL
)
9104 outrel
.r_addend
= 0;
9105 outrel
.r_offset
= (sgot
->output_section
->vma
9106 + sgot
->output_offset
+ off
);
9107 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
9109 if (globals
->use_rel
)
9110 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9111 sgot
->contents
+ off
);
9113 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9116 bfd_put_32 (output_bfd
, 1, sgot
->contents
+ off
);
9118 globals
->tls_ldm_got
.offset
|= 1;
9121 value
= sgot
->output_section
->vma
+ sgot
->output_offset
+ off
9122 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
9124 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9125 contents
, rel
->r_offset
, value
,
9129 case R_ARM_TLS_CALL
:
9130 case R_ARM_THM_TLS_CALL
:
9131 case R_ARM_TLS_GD32
:
9132 case R_ARM_TLS_IE32
:
9133 case R_ARM_TLS_GOTDESC
:
9134 case R_ARM_TLS_DESCSEQ
:
9135 case R_ARM_THM_TLS_DESCSEQ
:
9137 bfd_vma off
, offplt
;
9141 BFD_ASSERT (sgot
!= NULL
);
9146 dyn
= globals
->root
.dynamic_sections_created
;
9147 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
9149 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
9151 *unresolved_reloc_p
= FALSE
;
9154 off
= h
->got
.offset
;
9155 offplt
= elf32_arm_hash_entry (h
)->tlsdesc_got
;
9156 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
9160 BFD_ASSERT (local_got_offsets
!= NULL
);
9161 off
= local_got_offsets
[r_symndx
];
9162 offplt
= local_tlsdesc_gotents
[r_symndx
];
9163 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
9166 /* Linker relaxations happens from one of the
9167 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
9168 if (ELF32_R_TYPE(rel
->r_info
) != r_type
)
9169 tls_type
= GOT_TLS_IE
;
9171 BFD_ASSERT (tls_type
!= GOT_UNKNOWN
);
9177 bfd_boolean need_relocs
= FALSE
;
9178 Elf_Internal_Rela outrel
;
9181 /* The GOT entries have not been initialized yet. Do it
9182 now, and emit any relocations. If both an IE GOT and a
9183 GD GOT are necessary, we emit the GD first. */
9185 if ((info
->shared
|| indx
!= 0)
9187 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
9188 || h
->root
.type
!= bfd_link_hash_undefweak
))
9191 BFD_ASSERT (srelgot
!= NULL
);
9194 if (tls_type
& GOT_TLS_GDESC
)
9198 /* We should have relaxed, unless this is an undefined
9200 BFD_ASSERT ((h
&& (h
->root
.type
== bfd_link_hash_undefweak
))
9202 BFD_ASSERT (globals
->sgotplt_jump_table_size
+ offplt
+ 8
9203 <= globals
->root
.sgotplt
->size
);
9205 outrel
.r_addend
= 0;
9206 outrel
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
9207 + globals
->root
.sgotplt
->output_offset
9209 + globals
->sgotplt_jump_table_size
);
9211 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DESC
);
9212 sreloc
= globals
->root
.srelplt
;
9213 loc
= sreloc
->contents
;
9214 loc
+= globals
->next_tls_desc_index
++ * RELOC_SIZE (globals
);
9215 BFD_ASSERT (loc
+ RELOC_SIZE (globals
)
9216 <= sreloc
->contents
+ sreloc
->size
);
9218 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
9220 /* For globals, the first word in the relocation gets
9221 the relocation index and the top bit set, or zero,
9222 if we're binding now. For locals, it gets the
9223 symbol's offset in the tls section. */
9224 bfd_put_32 (output_bfd
,
9225 !h
? value
- elf_hash_table (info
)->tls_sec
->vma
9226 : info
->flags
& DF_BIND_NOW
? 0
9227 : 0x80000000 | ELF32_R_SYM (outrel
.r_info
),
9228 globals
->root
.sgotplt
->contents
+ offplt
+
9229 globals
->sgotplt_jump_table_size
);
9231 /* Second word in the relocation is always zero. */
9232 bfd_put_32 (output_bfd
, 0,
9233 globals
->root
.sgotplt
->contents
+ offplt
+
9234 globals
->sgotplt_jump_table_size
+ 4);
9236 if (tls_type
& GOT_TLS_GD
)
9240 outrel
.r_addend
= 0;
9241 outrel
.r_offset
= (sgot
->output_section
->vma
9242 + sgot
->output_offset
9244 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
9246 if (globals
->use_rel
)
9247 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9248 sgot
->contents
+ cur_off
);
9250 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9253 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
9254 sgot
->contents
+ cur_off
+ 4);
9257 outrel
.r_addend
= 0;
9258 outrel
.r_info
= ELF32_R_INFO (indx
,
9259 R_ARM_TLS_DTPOFF32
);
9260 outrel
.r_offset
+= 4;
9262 if (globals
->use_rel
)
9263 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9264 sgot
->contents
+ cur_off
+ 4);
9266 elf32_arm_add_dynreloc (output_bfd
, info
,
9272 /* If we are not emitting relocations for a
9273 general dynamic reference, then we must be in a
9274 static link or an executable link with the
9275 symbol binding locally. Mark it as belonging
9276 to module 1, the executable. */
9277 bfd_put_32 (output_bfd
, 1,
9278 sgot
->contents
+ cur_off
);
9279 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
9280 sgot
->contents
+ cur_off
+ 4);
9286 if (tls_type
& GOT_TLS_IE
)
9291 outrel
.r_addend
= value
- dtpoff_base (info
);
9293 outrel
.r_addend
= 0;
9294 outrel
.r_offset
= (sgot
->output_section
->vma
9295 + sgot
->output_offset
9297 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
9299 if (globals
->use_rel
)
9300 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9301 sgot
->contents
+ cur_off
);
9303 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9306 bfd_put_32 (output_bfd
, tpoff (info
, value
),
9307 sgot
->contents
+ cur_off
);
9314 local_got_offsets
[r_symndx
] |= 1;
9317 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
9319 else if (tls_type
& GOT_TLS_GDESC
)
9322 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
9323 || ELF32_R_TYPE(rel
->r_info
) == R_ARM_THM_TLS_CALL
)
9325 bfd_signed_vma offset
;
9326 /* TLS stubs are arm mode. The original symbol is a
9327 data object, so branch_type is bogus. */
9328 branch_type
= ST_BRANCH_TO_ARM
;
9329 enum elf32_arm_stub_type stub_type
9330 = arm_type_of_stub (info
, input_section
, rel
,
9331 st_type
, &branch_type
,
9332 (struct elf32_arm_link_hash_entry
*)h
,
9333 globals
->tls_trampoline
, globals
->root
.splt
,
9334 input_bfd
, sym_name
);
9336 if (stub_type
!= arm_stub_none
)
9338 struct elf32_arm_stub_hash_entry
*stub_entry
9339 = elf32_arm_get_stub_entry
9340 (input_section
, globals
->root
.splt
, 0, rel
,
9341 globals
, stub_type
);
9342 offset
= (stub_entry
->stub_offset
9343 + stub_entry
->stub_sec
->output_offset
9344 + stub_entry
->stub_sec
->output_section
->vma
);
9347 offset
= (globals
->root
.splt
->output_section
->vma
9348 + globals
->root
.splt
->output_offset
9349 + globals
->tls_trampoline
);
9351 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
)
9355 offset
-= (input_section
->output_section
->vma
+
9356 input_section
->output_offset
+ rel
->r_offset
+ 8);
9360 value
= inst
| (globals
->use_blx
? 0xfa000000 : 0xeb000000);
9364 /* Thumb blx encodes the offset in a complicated
9366 unsigned upper_insn
, lower_insn
;
9369 offset
-= (input_section
->output_section
->vma
+
9370 input_section
->output_offset
9371 + rel
->r_offset
+ 4);
9373 if (stub_type
!= arm_stub_none
9374 && arm_stub_is_thumb (stub_type
))
9376 lower_insn
= 0xd000;
9380 lower_insn
= 0xc000;
9381 /* Round up the offset to a word boundary */
9382 offset
= (offset
+ 2) & ~2;
9386 upper_insn
= (0xf000
9387 | ((offset
>> 12) & 0x3ff)
9389 lower_insn
|= (((!((offset
>> 23) & 1)) ^ neg
) << 13)
9390 | (((!((offset
>> 22) & 1)) ^ neg
) << 11)
9391 | ((offset
>> 1) & 0x7ff);
9392 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
9393 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
9394 return bfd_reloc_ok
;
9397 /* These relocations needs special care, as besides the fact
9398 they point somewhere in .gotplt, the addend must be
9399 adjusted accordingly depending on the type of instruction
9401 else if ((r_type
== R_ARM_TLS_GOTDESC
) && (tls_type
& GOT_TLS_GDESC
))
9403 unsigned long data
, insn
;
9406 data
= bfd_get_32 (input_bfd
, hit_data
);
9412 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
- data
);
9413 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
9415 | bfd_get_16 (input_bfd
,
9416 contents
+ rel
->r_offset
- data
+ 2);
9417 if ((insn
& 0xf800c000) == 0xf000c000)
9420 else if ((insn
& 0xffffff00) == 0x4400)
9425 (*_bfd_error_handler
)
9426 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
9427 input_bfd
, input_section
,
9428 (unsigned long)rel
->r_offset
, insn
);
9429 return bfd_reloc_notsupported
;
9434 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
- data
);
9439 case 0xfa: /* blx */
9443 case 0xe0: /* add */
9448 (*_bfd_error_handler
)
9449 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
9450 input_bfd
, input_section
,
9451 (unsigned long)rel
->r_offset
, insn
);
9452 return bfd_reloc_notsupported
;
9456 value
+= ((globals
->root
.sgotplt
->output_section
->vma
9457 + globals
->root
.sgotplt
->output_offset
+ off
)
9458 - (input_section
->output_section
->vma
9459 + input_section
->output_offset
9461 + globals
->sgotplt_jump_table_size
);
9464 value
= ((globals
->root
.sgot
->output_section
->vma
9465 + globals
->root
.sgot
->output_offset
+ off
)
9466 - (input_section
->output_section
->vma
9467 + input_section
->output_offset
+ rel
->r_offset
));
9469 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9470 contents
, rel
->r_offset
, value
,
9474 case R_ARM_TLS_LE32
:
9475 if (info
->shared
&& !info
->pie
)
9477 (*_bfd_error_handler
)
9478 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
9479 input_bfd
, input_section
,
9480 (long) rel
->r_offset
, howto
->name
);
9481 return (bfd_reloc_status_type
) FALSE
;
9484 value
= tpoff (info
, value
);
9486 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9487 contents
, rel
->r_offset
, value
,
9491 if (globals
->fix_v4bx
)
9493 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9495 /* Ensure that we have a BX instruction. */
9496 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
9498 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
9500 /* Branch to veneer. */
9502 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
9503 glue_addr
-= input_section
->output_section
->vma
9504 + input_section
->output_offset
9505 + rel
->r_offset
+ 8;
9506 insn
= (insn
& 0xf0000000) | 0x0a000000
9507 | ((glue_addr
>> 2) & 0x00ffffff);
9511 /* Preserve Rm (lowest four bits) and the condition code
9512 (highest four bits). Other bits encode MOV PC,Rm. */
9513 insn
= (insn
& 0xf000000f) | 0x01a0f000;
9516 bfd_put_32 (input_bfd
, insn
, hit_data
);
9518 return bfd_reloc_ok
;
9520 case R_ARM_MOVW_ABS_NC
:
9521 case R_ARM_MOVT_ABS
:
9522 case R_ARM_MOVW_PREL_NC
:
9523 case R_ARM_MOVT_PREL
:
9524 /* Until we properly support segment-base-relative addressing then
9525 we assume the segment base to be zero, as for the group relocations.
9526 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
9527 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
9528 case R_ARM_MOVW_BREL_NC
:
9529 case R_ARM_MOVW_BREL
:
9530 case R_ARM_MOVT_BREL
:
9532 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9534 if (globals
->use_rel
)
9536 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
9537 signed_addend
= (addend
^ 0x8000) - 0x8000;
9540 value
+= signed_addend
;
9542 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
9543 value
-= (input_section
->output_section
->vma
9544 + input_section
->output_offset
+ rel
->r_offset
);
9546 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
9547 return bfd_reloc_overflow
;
9549 if (branch_type
== ST_BRANCH_TO_THUMB
)
9552 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
9553 || r_type
== R_ARM_MOVT_BREL
)
9557 insn
|= value
& 0xfff;
9558 insn
|= (value
& 0xf000) << 4;
9559 bfd_put_32 (input_bfd
, insn
, hit_data
);
9561 return bfd_reloc_ok
;
9563 case R_ARM_THM_MOVW_ABS_NC
:
9564 case R_ARM_THM_MOVT_ABS
:
9565 case R_ARM_THM_MOVW_PREL_NC
:
9566 case R_ARM_THM_MOVT_PREL
:
9567 /* Until we properly support segment-base-relative addressing then
9568 we assume the segment base to be zero, as for the above relocations.
9569 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
9570 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
9571 as R_ARM_THM_MOVT_ABS. */
9572 case R_ARM_THM_MOVW_BREL_NC
:
9573 case R_ARM_THM_MOVW_BREL
:
9574 case R_ARM_THM_MOVT_BREL
:
9578 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
9579 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
9581 if (globals
->use_rel
)
9583 addend
= ((insn
>> 4) & 0xf000)
9584 | ((insn
>> 15) & 0x0800)
9585 | ((insn
>> 4) & 0x0700)
9587 signed_addend
= (addend
^ 0x8000) - 0x8000;
9590 value
+= signed_addend
;
9592 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
9593 value
-= (input_section
->output_section
->vma
9594 + input_section
->output_offset
+ rel
->r_offset
);
9596 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
9597 return bfd_reloc_overflow
;
9599 if (branch_type
== ST_BRANCH_TO_THUMB
)
9602 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
9603 || r_type
== R_ARM_THM_MOVT_BREL
)
9607 insn
|= (value
& 0xf000) << 4;
9608 insn
|= (value
& 0x0800) << 15;
9609 insn
|= (value
& 0x0700) << 4;
9610 insn
|= (value
& 0x00ff);
9612 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
9613 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
9615 return bfd_reloc_ok
;
9617 case R_ARM_ALU_PC_G0_NC
:
9618 case R_ARM_ALU_PC_G1_NC
:
9619 case R_ARM_ALU_PC_G0
:
9620 case R_ARM_ALU_PC_G1
:
9621 case R_ARM_ALU_PC_G2
:
9622 case R_ARM_ALU_SB_G0_NC
:
9623 case R_ARM_ALU_SB_G1_NC
:
9624 case R_ARM_ALU_SB_G0
:
9625 case R_ARM_ALU_SB_G1
:
9626 case R_ARM_ALU_SB_G2
:
9628 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9629 bfd_vma pc
= input_section
->output_section
->vma
9630 + input_section
->output_offset
+ rel
->r_offset
;
9631 /* sb should be the origin of the *segment* containing the symbol.
9632 It is not clear how to obtain this OS-dependent value, so we
9633 make an arbitrary choice of zero. */
9637 bfd_signed_vma signed_value
;
9640 /* Determine which group of bits to select. */
9643 case R_ARM_ALU_PC_G0_NC
:
9644 case R_ARM_ALU_PC_G0
:
9645 case R_ARM_ALU_SB_G0_NC
:
9646 case R_ARM_ALU_SB_G0
:
9650 case R_ARM_ALU_PC_G1_NC
:
9651 case R_ARM_ALU_PC_G1
:
9652 case R_ARM_ALU_SB_G1_NC
:
9653 case R_ARM_ALU_SB_G1
:
9657 case R_ARM_ALU_PC_G2
:
9658 case R_ARM_ALU_SB_G2
:
9666 /* If REL, extract the addend from the insn. If RELA, it will
9667 have already been fetched for us. */
9668 if (globals
->use_rel
)
9671 bfd_vma constant
= insn
& 0xff;
9672 bfd_vma rotation
= (insn
& 0xf00) >> 8;
9675 signed_addend
= constant
;
9678 /* Compensate for the fact that in the instruction, the
9679 rotation is stored in multiples of 2 bits. */
9682 /* Rotate "constant" right by "rotation" bits. */
9683 signed_addend
= (constant
>> rotation
) |
9684 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
9687 /* Determine if the instruction is an ADD or a SUB.
9688 (For REL, this determines the sign of the addend.) */
9689 negative
= identify_add_or_sub (insn
);
9692 (*_bfd_error_handler
)
9693 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
9694 input_bfd
, input_section
,
9695 (long) rel
->r_offset
, howto
->name
);
9696 return bfd_reloc_overflow
;
9699 signed_addend
*= negative
;
9702 /* Compute the value (X) to go in the place. */
9703 if (r_type
== R_ARM_ALU_PC_G0_NC
9704 || r_type
== R_ARM_ALU_PC_G1_NC
9705 || r_type
== R_ARM_ALU_PC_G0
9706 || r_type
== R_ARM_ALU_PC_G1
9707 || r_type
== R_ARM_ALU_PC_G2
)
9709 signed_value
= value
- pc
+ signed_addend
;
9711 /* Section base relative. */
9712 signed_value
= value
- sb
+ signed_addend
;
9714 /* If the target symbol is a Thumb function, then set the
9715 Thumb bit in the address. */
9716 if (branch_type
== ST_BRANCH_TO_THUMB
)
9719 /* Calculate the value of the relevant G_n, in encoded
9720 constant-with-rotation format. */
9721 g_n
= calculate_group_reloc_mask (abs (signed_value
), group
,
9724 /* Check for overflow if required. */
9725 if ((r_type
== R_ARM_ALU_PC_G0
9726 || r_type
== R_ARM_ALU_PC_G1
9727 || r_type
== R_ARM_ALU_PC_G2
9728 || r_type
== R_ARM_ALU_SB_G0
9729 || r_type
== R_ARM_ALU_SB_G1
9730 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
9732 (*_bfd_error_handler
)
9733 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9734 input_bfd
, input_section
,
9735 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
9736 return bfd_reloc_overflow
;
9739 /* Mask out the value and the ADD/SUB part of the opcode; take care
9740 not to destroy the S bit. */
9743 /* Set the opcode according to whether the value to go in the
9744 place is negative. */
9745 if (signed_value
< 0)
9750 /* Encode the offset. */
9753 bfd_put_32 (input_bfd
, insn
, hit_data
);
9755 return bfd_reloc_ok
;
9757 case R_ARM_LDR_PC_G0
:
9758 case R_ARM_LDR_PC_G1
:
9759 case R_ARM_LDR_PC_G2
:
9760 case R_ARM_LDR_SB_G0
:
9761 case R_ARM_LDR_SB_G1
:
9762 case R_ARM_LDR_SB_G2
:
9764 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9765 bfd_vma pc
= input_section
->output_section
->vma
9766 + input_section
->output_offset
+ rel
->r_offset
;
9767 bfd_vma sb
= 0; /* See note above. */
9769 bfd_signed_vma signed_value
;
9772 /* Determine which groups of bits to calculate. */
9775 case R_ARM_LDR_PC_G0
:
9776 case R_ARM_LDR_SB_G0
:
9780 case R_ARM_LDR_PC_G1
:
9781 case R_ARM_LDR_SB_G1
:
9785 case R_ARM_LDR_PC_G2
:
9786 case R_ARM_LDR_SB_G2
:
9794 /* If REL, extract the addend from the insn. If RELA, it will
9795 have already been fetched for us. */
9796 if (globals
->use_rel
)
9798 int negative
= (insn
& (1 << 23)) ? 1 : -1;
9799 signed_addend
= negative
* (insn
& 0xfff);
9802 /* Compute the value (X) to go in the place. */
9803 if (r_type
== R_ARM_LDR_PC_G0
9804 || r_type
== R_ARM_LDR_PC_G1
9805 || r_type
== R_ARM_LDR_PC_G2
)
9807 signed_value
= value
- pc
+ signed_addend
;
9809 /* Section base relative. */
9810 signed_value
= value
- sb
+ signed_addend
;
9812 /* Calculate the value of the relevant G_{n-1} to obtain
9813 the residual at that stage. */
9814 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
9816 /* Check for overflow. */
9817 if (residual
>= 0x1000)
9819 (*_bfd_error_handler
)
9820 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9821 input_bfd
, input_section
,
9822 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
9823 return bfd_reloc_overflow
;
9826 /* Mask out the value and U bit. */
9829 /* Set the U bit if the value to go in the place is non-negative. */
9830 if (signed_value
>= 0)
9833 /* Encode the offset. */
9836 bfd_put_32 (input_bfd
, insn
, hit_data
);
9838 return bfd_reloc_ok
;
9840 case R_ARM_LDRS_PC_G0
:
9841 case R_ARM_LDRS_PC_G1
:
9842 case R_ARM_LDRS_PC_G2
:
9843 case R_ARM_LDRS_SB_G0
:
9844 case R_ARM_LDRS_SB_G1
:
9845 case R_ARM_LDRS_SB_G2
:
9847 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9848 bfd_vma pc
= input_section
->output_section
->vma
9849 + input_section
->output_offset
+ rel
->r_offset
;
9850 bfd_vma sb
= 0; /* See note above. */
9852 bfd_signed_vma signed_value
;
9855 /* Determine which groups of bits to calculate. */
9858 case R_ARM_LDRS_PC_G0
:
9859 case R_ARM_LDRS_SB_G0
:
9863 case R_ARM_LDRS_PC_G1
:
9864 case R_ARM_LDRS_SB_G1
:
9868 case R_ARM_LDRS_PC_G2
:
9869 case R_ARM_LDRS_SB_G2
:
9877 /* If REL, extract the addend from the insn. If RELA, it will
9878 have already been fetched for us. */
9879 if (globals
->use_rel
)
9881 int negative
= (insn
& (1 << 23)) ? 1 : -1;
9882 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
9885 /* Compute the value (X) to go in the place. */
9886 if (r_type
== R_ARM_LDRS_PC_G0
9887 || r_type
== R_ARM_LDRS_PC_G1
9888 || r_type
== R_ARM_LDRS_PC_G2
)
9890 signed_value
= value
- pc
+ signed_addend
;
9892 /* Section base relative. */
9893 signed_value
= value
- sb
+ signed_addend
;
9895 /* Calculate the value of the relevant G_{n-1} to obtain
9896 the residual at that stage. */
9897 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
9899 /* Check for overflow. */
9900 if (residual
>= 0x100)
9902 (*_bfd_error_handler
)
9903 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9904 input_bfd
, input_section
,
9905 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
9906 return bfd_reloc_overflow
;
9909 /* Mask out the value and U bit. */
9912 /* Set the U bit if the value to go in the place is non-negative. */
9913 if (signed_value
>= 0)
9916 /* Encode the offset. */
9917 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
9919 bfd_put_32 (input_bfd
, insn
, hit_data
);
9921 return bfd_reloc_ok
;
9923 case R_ARM_LDC_PC_G0
:
9924 case R_ARM_LDC_PC_G1
:
9925 case R_ARM_LDC_PC_G2
:
9926 case R_ARM_LDC_SB_G0
:
9927 case R_ARM_LDC_SB_G1
:
9928 case R_ARM_LDC_SB_G2
:
9930 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9931 bfd_vma pc
= input_section
->output_section
->vma
9932 + input_section
->output_offset
+ rel
->r_offset
;
9933 bfd_vma sb
= 0; /* See note above. */
9935 bfd_signed_vma signed_value
;
9938 /* Determine which groups of bits to calculate. */
9941 case R_ARM_LDC_PC_G0
:
9942 case R_ARM_LDC_SB_G0
:
9946 case R_ARM_LDC_PC_G1
:
9947 case R_ARM_LDC_SB_G1
:
9951 case R_ARM_LDC_PC_G2
:
9952 case R_ARM_LDC_SB_G2
:
9960 /* If REL, extract the addend from the insn. If RELA, it will
9961 have already been fetched for us. */
9962 if (globals
->use_rel
)
9964 int negative
= (insn
& (1 << 23)) ? 1 : -1;
9965 signed_addend
= negative
* ((insn
& 0xff) << 2);
9968 /* Compute the value (X) to go in the place. */
9969 if (r_type
== R_ARM_LDC_PC_G0
9970 || r_type
== R_ARM_LDC_PC_G1
9971 || r_type
== R_ARM_LDC_PC_G2
)
9973 signed_value
= value
- pc
+ signed_addend
;
9975 /* Section base relative. */
9976 signed_value
= value
- sb
+ signed_addend
;
9978 /* Calculate the value of the relevant G_{n-1} to obtain
9979 the residual at that stage. */
9980 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
9982 /* Check for overflow. (The absolute value to go in the place must be
9983 divisible by four and, after having been divided by four, must
9984 fit in eight bits.) */
9985 if ((residual
& 0x3) != 0 || residual
>= 0x400)
9987 (*_bfd_error_handler
)
9988 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9989 input_bfd
, input_section
,
9990 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
9991 return bfd_reloc_overflow
;
9994 /* Mask out the value and U bit. */
9997 /* Set the U bit if the value to go in the place is non-negative. */
9998 if (signed_value
>= 0)
10001 /* Encode the offset. */
10002 insn
|= residual
>> 2;
10004 bfd_put_32 (input_bfd
, insn
, hit_data
);
10006 return bfd_reloc_ok
;
10009 return bfd_reloc_notsupported
;
10013 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
10015 arm_add_to_rel (bfd
* abfd
,
10016 bfd_byte
* address
,
10017 reloc_howto_type
* howto
,
10018 bfd_signed_vma increment
)
10020 bfd_signed_vma addend
;
10022 if (howto
->type
== R_ARM_THM_CALL
10023 || howto
->type
== R_ARM_THM_JUMP24
)
10025 int upper_insn
, lower_insn
;
10028 upper_insn
= bfd_get_16 (abfd
, address
);
10029 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
10030 upper
= upper_insn
& 0x7ff;
10031 lower
= lower_insn
& 0x7ff;
10033 addend
= (upper
<< 12) | (lower
<< 1);
10034 addend
+= increment
;
10037 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
10038 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
10040 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
10041 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
10047 contents
= bfd_get_32 (abfd
, address
);
10049 /* Get the (signed) value from the instruction. */
10050 addend
= contents
& howto
->src_mask
;
10051 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10053 bfd_signed_vma mask
;
10056 mask
&= ~ howto
->src_mask
;
10060 /* Add in the increment, (which is a byte value). */
10061 switch (howto
->type
)
10064 addend
+= increment
;
10071 addend
<<= howto
->size
;
10072 addend
+= increment
;
10074 /* Should we check for overflow here ? */
10076 /* Drop any undesired bits. */
10077 addend
>>= howto
->rightshift
;
10081 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
10083 bfd_put_32 (abfd
, contents
, address
);
10087 #define IS_ARM_TLS_RELOC(R_TYPE) \
10088 ((R_TYPE) == R_ARM_TLS_GD32 \
10089 || (R_TYPE) == R_ARM_TLS_LDO32 \
10090 || (R_TYPE) == R_ARM_TLS_LDM32 \
10091 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
10092 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
10093 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
10094 || (R_TYPE) == R_ARM_TLS_LE32 \
10095 || (R_TYPE) == R_ARM_TLS_IE32 \
10096 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
10098 /* Specific set of relocations for the gnu tls dialect. */
10099 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
10100 ((R_TYPE) == R_ARM_TLS_GOTDESC \
10101 || (R_TYPE) == R_ARM_TLS_CALL \
10102 || (R_TYPE) == R_ARM_THM_TLS_CALL \
10103 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
10104 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
10106 /* Relocate an ARM ELF section. */
10109 elf32_arm_relocate_section (bfd
* output_bfd
,
10110 struct bfd_link_info
* info
,
10112 asection
* input_section
,
10113 bfd_byte
* contents
,
10114 Elf_Internal_Rela
* relocs
,
10115 Elf_Internal_Sym
* local_syms
,
10116 asection
** local_sections
)
10118 Elf_Internal_Shdr
*symtab_hdr
;
10119 struct elf_link_hash_entry
**sym_hashes
;
10120 Elf_Internal_Rela
*rel
;
10121 Elf_Internal_Rela
*relend
;
10123 struct elf32_arm_link_hash_table
* globals
;
10125 globals
= elf32_arm_hash_table (info
);
10126 if (globals
== NULL
)
10129 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
10130 sym_hashes
= elf_sym_hashes (input_bfd
);
10133 relend
= relocs
+ input_section
->reloc_count
;
10134 for (; rel
< relend
; rel
++)
10137 reloc_howto_type
* howto
;
10138 unsigned long r_symndx
;
10139 Elf_Internal_Sym
* sym
;
10141 struct elf_link_hash_entry
* h
;
10142 bfd_vma relocation
;
10143 bfd_reloc_status_type r
;
10146 bfd_boolean unresolved_reloc
= FALSE
;
10147 char *error_message
= NULL
;
10149 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10150 r_type
= ELF32_R_TYPE (rel
->r_info
);
10151 r_type
= arm_real_reloc_type (globals
, r_type
);
10153 if ( r_type
== R_ARM_GNU_VTENTRY
10154 || r_type
== R_ARM_GNU_VTINHERIT
)
10157 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
10158 howto
= bfd_reloc
.howto
;
10164 if (r_symndx
< symtab_hdr
->sh_info
)
10166 sym
= local_syms
+ r_symndx
;
10167 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
10168 sec
= local_sections
[r_symndx
];
10170 /* An object file might have a reference to a local
10171 undefined symbol. This is a daft object file, but we
10172 should at least do something about it. V4BX & NONE
10173 relocations do not use the symbol and are explicitly
10174 allowed to use the undefined symbol, so allow those.
10175 Likewise for relocations against STN_UNDEF. */
10176 if (r_type
!= R_ARM_V4BX
10177 && r_type
!= R_ARM_NONE
10178 && r_symndx
!= STN_UNDEF
10179 && bfd_is_und_section (sec
)
10180 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
10182 if (!info
->callbacks
->undefined_symbol
10183 (info
, bfd_elf_string_from_elf_section
10184 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
10185 input_bfd
, input_section
,
10186 rel
->r_offset
, TRUE
))
10190 if (globals
->use_rel
)
10192 relocation
= (sec
->output_section
->vma
10193 + sec
->output_offset
10195 if (!info
->relocatable
10196 && (sec
->flags
& SEC_MERGE
)
10197 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
10200 bfd_vma addend
, value
;
10204 case R_ARM_MOVW_ABS_NC
:
10205 case R_ARM_MOVT_ABS
:
10206 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
10207 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
10208 addend
= (addend
^ 0x8000) - 0x8000;
10211 case R_ARM_THM_MOVW_ABS_NC
:
10212 case R_ARM_THM_MOVT_ABS
:
10213 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
10215 value
|= bfd_get_16 (input_bfd
,
10216 contents
+ rel
->r_offset
+ 2);
10217 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
10218 | ((value
& 0x04000000) >> 15);
10219 addend
= (addend
^ 0x8000) - 0x8000;
10223 if (howto
->rightshift
10224 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
10226 (*_bfd_error_handler
)
10227 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
10228 input_bfd
, input_section
,
10229 (long) rel
->r_offset
, howto
->name
);
10233 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
10235 /* Get the (signed) value from the instruction. */
10236 addend
= value
& howto
->src_mask
;
10237 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10239 bfd_signed_vma mask
;
10242 mask
&= ~ howto
->src_mask
;
10250 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
10252 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
10254 /* Cases here must match those in the preceding
10255 switch statement. */
10258 case R_ARM_MOVW_ABS_NC
:
10259 case R_ARM_MOVT_ABS
:
10260 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
10261 | (addend
& 0xfff);
10262 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
10265 case R_ARM_THM_MOVW_ABS_NC
:
10266 case R_ARM_THM_MOVT_ABS
:
10267 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
10268 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
10269 bfd_put_16 (input_bfd
, value
>> 16,
10270 contents
+ rel
->r_offset
);
10271 bfd_put_16 (input_bfd
, value
,
10272 contents
+ rel
->r_offset
+ 2);
10276 value
= (value
& ~ howto
->dst_mask
)
10277 | (addend
& howto
->dst_mask
);
10278 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
10284 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
10288 bfd_boolean warned
;
10290 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
10291 r_symndx
, symtab_hdr
, sym_hashes
,
10292 h
, sec
, relocation
,
10293 unresolved_reloc
, warned
);
10295 sym_type
= h
->type
;
10298 if (sec
!= NULL
&& elf_discarded_section (sec
))
10299 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
10300 rel
, relend
, howto
, contents
);
10302 if (info
->relocatable
)
10304 /* This is a relocatable link. We don't have to change
10305 anything, unless the reloc is against a section symbol,
10306 in which case we have to adjust according to where the
10307 section symbol winds up in the output section. */
10308 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
10310 if (globals
->use_rel
)
10311 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
10312 howto
, (bfd_signed_vma
) sec
->output_offset
);
10314 rel
->r_addend
+= sec
->output_offset
;
10320 name
= h
->root
.root
.string
;
10323 name
= (bfd_elf_string_from_elf_section
10324 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
10325 if (name
== NULL
|| *name
== '\0')
10326 name
= bfd_section_name (input_bfd
, sec
);
10329 if (r_symndx
!= STN_UNDEF
10330 && r_type
!= R_ARM_NONE
10332 || h
->root
.type
== bfd_link_hash_defined
10333 || h
->root
.type
== bfd_link_hash_defweak
)
10334 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
10336 (*_bfd_error_handler
)
10337 ((sym_type
== STT_TLS
10338 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10339 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
10342 (long) rel
->r_offset
,
10347 /* We call elf32_arm_final_link_relocate unless we're completely
10348 done, i.e., the relaxation produced the final output we want,
10349 and we won't let anybody mess with it. Also, we have to do
10350 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
10351 both in relaxed and non-relaxed cases */
10352 if ((elf32_arm_tls_transition (info
, r_type
, h
) != (unsigned)r_type
)
10353 || (IS_ARM_TLS_GNU_RELOC (r_type
)
10354 && !((h
? elf32_arm_hash_entry (h
)->tls_type
:
10355 elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
])
10358 r
= elf32_arm_tls_relax (globals
, input_bfd
, input_section
,
10359 contents
, rel
, h
== NULL
);
10360 /* This may have been marked unresolved because it came from
10361 a shared library. But we've just dealt with that. */
10362 unresolved_reloc
= 0;
10365 r
= bfd_reloc_continue
;
10367 if (r
== bfd_reloc_continue
)
10368 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
10369 input_section
, contents
, rel
,
10370 relocation
, info
, sec
, name
, sym_type
,
10371 (h
? h
->target_internal
10372 : ARM_SYM_BRANCH_TYPE (sym
)), h
,
10373 &unresolved_reloc
, &error_message
);
10375 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10376 because such sections are not SEC_ALLOC and thus ld.so will
10377 not process them. */
10378 if (unresolved_reloc
10379 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
10380 && h
->def_dynamic
))
10382 (*_bfd_error_handler
)
10383 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10386 (long) rel
->r_offset
,
10388 h
->root
.root
.string
);
10392 if (r
!= bfd_reloc_ok
)
10396 case bfd_reloc_overflow
:
10397 /* If the overflowing reloc was to an undefined symbol,
10398 we have already printed one error message and there
10399 is no point complaining again. */
10401 h
->root
.type
!= bfd_link_hash_undefined
)
10402 && (!((*info
->callbacks
->reloc_overflow
)
10403 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
10404 (bfd_vma
) 0, input_bfd
, input_section
,
10409 case bfd_reloc_undefined
:
10410 if (!((*info
->callbacks
->undefined_symbol
)
10411 (info
, name
, input_bfd
, input_section
,
10412 rel
->r_offset
, TRUE
)))
10416 case bfd_reloc_outofrange
:
10417 error_message
= _("out of range");
10420 case bfd_reloc_notsupported
:
10421 error_message
= _("unsupported relocation");
10424 case bfd_reloc_dangerous
:
10425 /* error_message should already be set. */
10429 error_message
= _("unknown error");
10430 /* Fall through. */
10433 BFD_ASSERT (error_message
!= NULL
);
10434 if (!((*info
->callbacks
->reloc_dangerous
)
10435 (info
, error_message
, input_bfd
, input_section
,
10446 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
10447 adds the edit to the start of the list. (The list must be built in order of
10448 ascending TINDEX: the function's callers are primarily responsible for
10449 maintaining that condition). */
10452 add_unwind_table_edit (arm_unwind_table_edit
**head
,
10453 arm_unwind_table_edit
**tail
,
10454 arm_unwind_edit_type type
,
10455 asection
*linked_section
,
10456 unsigned int tindex
)
10458 arm_unwind_table_edit
*new_edit
= (arm_unwind_table_edit
*)
10459 xmalloc (sizeof (arm_unwind_table_edit
));
10461 new_edit
->type
= type
;
10462 new_edit
->linked_section
= linked_section
;
10463 new_edit
->index
= tindex
;
10467 new_edit
->next
= NULL
;
10470 (*tail
)->next
= new_edit
;
10472 (*tail
) = new_edit
;
10475 (*head
) = new_edit
;
10479 new_edit
->next
= *head
;
10488 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
10490 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
10492 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
10496 if (!exidx_sec
->rawsize
)
10497 exidx_sec
->rawsize
= exidx_sec
->size
;
10499 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
10500 out_sec
= exidx_sec
->output_section
;
10501 /* Adjust size of output section. */
10502 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
10505 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
10507 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
10509 struct _arm_elf_section_data
*exidx_arm_data
;
10511 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
10512 add_unwind_table_edit (
10513 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
10514 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
10515 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
10517 adjust_exidx_size(exidx_sec
, 8);
10520 /* Scan .ARM.exidx tables, and create a list describing edits which should be
10521 made to those tables, such that:
10523 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
10524 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
10525 codes which have been inlined into the index).
10527 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
10529 The edits are applied when the tables are written
10530 (in elf32_arm_write_section).
10534 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
10535 unsigned int num_text_sections
,
10536 struct bfd_link_info
*info
,
10537 bfd_boolean merge_exidx_entries
)
10540 unsigned int last_second_word
= 0, i
;
10541 asection
*last_exidx_sec
= NULL
;
10542 asection
*last_text_sec
= NULL
;
10543 int last_unwind_type
= -1;
10545 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
10547 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link_next
)
10551 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
10553 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
10554 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
10556 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
10559 if (elf_sec
->linked_to
)
10561 Elf_Internal_Shdr
*linked_hdr
10562 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
10563 struct _arm_elf_section_data
*linked_sec_arm_data
10564 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
10566 if (linked_sec_arm_data
== NULL
)
10569 /* Link this .ARM.exidx section back from the text section it
10571 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
10576 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
10577 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
10578 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
10580 for (i
= 0; i
< num_text_sections
; i
++)
10582 asection
*sec
= text_section_order
[i
];
10583 asection
*exidx_sec
;
10584 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
10585 struct _arm_elf_section_data
*exidx_arm_data
;
10586 bfd_byte
*contents
= NULL
;
10587 int deleted_exidx_bytes
= 0;
10589 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
10590 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
10591 Elf_Internal_Shdr
*hdr
;
10594 if (arm_data
== NULL
)
10597 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
10598 if (exidx_sec
== NULL
)
10600 /* Section has no unwind data. */
10601 if (last_unwind_type
== 0 || !last_exidx_sec
)
10604 /* Ignore zero sized sections. */
10605 if (sec
->size
== 0)
10608 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
10609 last_unwind_type
= 0;
10613 /* Skip /DISCARD/ sections. */
10614 if (bfd_is_abs_section (exidx_sec
->output_section
))
10617 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
10618 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
10621 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
10622 if (exidx_arm_data
== NULL
)
10625 ibfd
= exidx_sec
->owner
;
10627 if (hdr
->contents
!= NULL
)
10628 contents
= hdr
->contents
;
10629 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
10633 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
10635 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
10639 /* An EXIDX_CANTUNWIND entry. */
10640 if (second_word
== 1)
10642 if (last_unwind_type
== 0)
10646 /* Inlined unwinding data. Merge if equal to previous. */
10647 else if ((second_word
& 0x80000000) != 0)
10649 if (merge_exidx_entries
10650 && last_second_word
== second_word
&& last_unwind_type
== 1)
10653 last_second_word
= second_word
;
10655 /* Normal table entry. In theory we could merge these too,
10656 but duplicate entries are likely to be much less common. */
10662 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
10663 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
10665 deleted_exidx_bytes
+= 8;
10668 last_unwind_type
= unwind_type
;
10671 /* Free contents if we allocated it ourselves. */
10672 if (contents
!= hdr
->contents
)
10675 /* Record edits to be applied later (in elf32_arm_write_section). */
10676 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
10677 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
10679 if (deleted_exidx_bytes
> 0)
10680 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
10682 last_exidx_sec
= exidx_sec
;
10683 last_text_sec
= sec
;
10686 /* Add terminating CANTUNWIND entry. */
10687 if (last_exidx_sec
&& last_unwind_type
!= 0)
10688 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
10694 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
10695 bfd
*ibfd
, const char *name
)
10697 asection
*sec
, *osec
;
10699 sec
= bfd_get_section_by_name (ibfd
, name
);
10700 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
10703 osec
= sec
->output_section
;
10704 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
10707 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
10708 sec
->output_offset
, sec
->size
))
10715 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10717 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
10718 asection
*sec
, *osec
;
10720 if (globals
== NULL
)
10723 /* Invoke the regular ELF backend linker to do all the work. */
10724 if (!bfd_elf_final_link (abfd
, info
))
10727 /* Process stub sections (eg BE8 encoding, ...). */
10728 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
10730 for (i
=0; i
<htab
->top_id
; i
++)
10732 sec
= htab
->stub_group
[i
].stub_sec
;
10733 /* Only process it once, in its link_sec slot. */
10734 if (sec
&& i
== htab
->stub_group
[i
].link_sec
->id
)
10736 osec
= sec
->output_section
;
10737 elf32_arm_write_section (abfd
, info
, sec
, sec
->contents
);
10738 if (! bfd_set_section_contents (abfd
, osec
, sec
->contents
,
10739 sec
->output_offset
, sec
->size
))
10744 /* Write out any glue sections now that we have created all the
10746 if (globals
->bfd_of_glue_owner
!= NULL
)
10748 if (! elf32_arm_output_glue_section (info
, abfd
,
10749 globals
->bfd_of_glue_owner
,
10750 ARM2THUMB_GLUE_SECTION_NAME
))
10753 if (! elf32_arm_output_glue_section (info
, abfd
,
10754 globals
->bfd_of_glue_owner
,
10755 THUMB2ARM_GLUE_SECTION_NAME
))
10758 if (! elf32_arm_output_glue_section (info
, abfd
,
10759 globals
->bfd_of_glue_owner
,
10760 VFP11_ERRATUM_VENEER_SECTION_NAME
))
10763 if (! elf32_arm_output_glue_section (info
, abfd
,
10764 globals
->bfd_of_glue_owner
,
10765 ARM_BX_GLUE_SECTION_NAME
))
10772 /* Set the right machine number. */
10775 elf32_arm_object_p (bfd
*abfd
)
10779 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
10781 if (mach
!= bfd_mach_arm_unknown
)
10782 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
10784 else if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
10785 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, bfd_mach_arm_ep9312
);
10788 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
10793 /* Function to keep ARM specific flags in the ELF header. */
10796 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
10798 if (elf_flags_init (abfd
)
10799 && elf_elfheader (abfd
)->e_flags
!= flags
)
10801 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
10803 if (flags
& EF_ARM_INTERWORK
)
10804 (*_bfd_error_handler
)
10805 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
10809 (_("Warning: Clearing the interworking flag of %B due to outside request"),
10815 elf_elfheader (abfd
)->e_flags
= flags
;
10816 elf_flags_init (abfd
) = TRUE
;
10822 /* Copy backend specific data from one object module to another. */
10825 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
10828 flagword out_flags
;
10830 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
10833 in_flags
= elf_elfheader (ibfd
)->e_flags
;
10834 out_flags
= elf_elfheader (obfd
)->e_flags
;
10836 if (elf_flags_init (obfd
)
10837 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
10838 && in_flags
!= out_flags
)
10840 /* Cannot mix APCS26 and APCS32 code. */
10841 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
10844 /* Cannot mix float APCS and non-float APCS code. */
10845 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
10848 /* If the src and dest have different interworking flags
10849 then turn off the interworking bit. */
10850 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
10852 if (out_flags
& EF_ARM_INTERWORK
)
10854 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
10857 in_flags
&= ~EF_ARM_INTERWORK
;
10860 /* Likewise for PIC, though don't warn for this case. */
10861 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
10862 in_flags
&= ~EF_ARM_PIC
;
10865 elf_elfheader (obfd
)->e_flags
= in_flags
;
10866 elf_flags_init (obfd
) = TRUE
;
10868 /* Also copy the EI_OSABI field. */
10869 elf_elfheader (obfd
)->e_ident
[EI_OSABI
] =
10870 elf_elfheader (ibfd
)->e_ident
[EI_OSABI
];
10872 /* Copy object attributes. */
10873 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
10878 /* Values for Tag_ABI_PCS_R9_use. */
10887 /* Values for Tag_ABI_PCS_RW_data. */
10890 AEABI_PCS_RW_data_absolute
,
10891 AEABI_PCS_RW_data_PCrel
,
10892 AEABI_PCS_RW_data_SBrel
,
10893 AEABI_PCS_RW_data_unused
10896 /* Values for Tag_ABI_enum_size. */
10902 AEABI_enum_forced_wide
10905 /* Determine whether an object attribute tag takes an integer, a
10909 elf32_arm_obj_attrs_arg_type (int tag
)
10911 if (tag
== Tag_compatibility
)
10912 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
10913 else if (tag
== Tag_nodefaults
)
10914 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
10915 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
10916 return ATTR_TYPE_FLAG_STR_VAL
;
10918 return ATTR_TYPE_FLAG_INT_VAL
;
10920 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
10923 /* The ABI defines that Tag_conformance should be emitted first, and that
10924 Tag_nodefaults should be second (if either is defined). This sets those
10925 two positions, and bumps up the position of all the remaining tags to
10928 elf32_arm_obj_attrs_order (int num
)
10930 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
)
10931 return Tag_conformance
;
10932 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
+ 1)
10933 return Tag_nodefaults
;
10934 if ((num
- 2) < Tag_nodefaults
)
10936 if ((num
- 1) < Tag_conformance
)
10941 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
10943 elf32_arm_obj_attrs_handle_unknown (bfd
*abfd
, int tag
)
10945 if ((tag
& 127) < 64)
10948 (_("%B: Unknown mandatory EABI object attribute %d"),
10950 bfd_set_error (bfd_error_bad_value
);
10956 (_("Warning: %B: Unknown EABI object attribute %d"),
10962 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
10963 Returns -1 if no architecture could be read. */
10966 get_secondary_compatible_arch (bfd
*abfd
)
10968 obj_attribute
*attr
=
10969 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
10971 /* Note: the tag and its argument below are uleb128 values, though
10972 currently-defined values fit in one byte for each. */
10974 && attr
->s
[0] == Tag_CPU_arch
10975 && (attr
->s
[1] & 128) != 128
10976 && attr
->s
[2] == 0)
10979 /* This tag is "safely ignorable", so don't complain if it looks funny. */
10983 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
10984 The tag is removed if ARCH is -1. */
10987 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
10989 obj_attribute
*attr
=
10990 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
10998 /* Note: the tag and its argument below are uleb128 values, though
10999 currently-defined values fit in one byte for each. */
11001 attr
->s
= (char *) bfd_alloc (abfd
, 3);
11002 attr
->s
[0] = Tag_CPU_arch
;
11007 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
11011 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
11012 int newtag
, int secondary_compat
)
11014 #define T(X) TAG_CPU_ARCH_##X
11015 int tagl
, tagh
, result
;
11018 T(V6T2
), /* PRE_V4. */
11020 T(V6T2
), /* V4T. */
11021 T(V6T2
), /* V5T. */
11022 T(V6T2
), /* V5TE. */
11023 T(V6T2
), /* V5TEJ. */
11026 T(V6T2
) /* V6T2. */
11030 T(V6K
), /* PRE_V4. */
11034 T(V6K
), /* V5TE. */
11035 T(V6K
), /* V5TEJ. */
11037 T(V6KZ
), /* V6KZ. */
11043 T(V7
), /* PRE_V4. */
11048 T(V7
), /* V5TEJ. */
11061 T(V6K
), /* V5TE. */
11062 T(V6K
), /* V5TEJ. */
11064 T(V6KZ
), /* V6KZ. */
11068 T(V6_M
) /* V6_M. */
11070 const int v6s_m
[] =
11076 T(V6K
), /* V5TE. */
11077 T(V6K
), /* V5TEJ. */
11079 T(V6KZ
), /* V6KZ. */
11083 T(V6S_M
), /* V6_M. */
11084 T(V6S_M
) /* V6S_M. */
11086 const int v7e_m
[] =
11090 T(V7E_M
), /* V4T. */
11091 T(V7E_M
), /* V5T. */
11092 T(V7E_M
), /* V5TE. */
11093 T(V7E_M
), /* V5TEJ. */
11094 T(V7E_M
), /* V6. */
11095 T(V7E_M
), /* V6KZ. */
11096 T(V7E_M
), /* V6T2. */
11097 T(V7E_M
), /* V6K. */
11098 T(V7E_M
), /* V7. */
11099 T(V7E_M
), /* V6_M. */
11100 T(V7E_M
), /* V6S_M. */
11101 T(V7E_M
) /* V7E_M. */
11103 const int v4t_plus_v6_m
[] =
11109 T(V5TE
), /* V5TE. */
11110 T(V5TEJ
), /* V5TEJ. */
11112 T(V6KZ
), /* V6KZ. */
11113 T(V6T2
), /* V6T2. */
11116 T(V6_M
), /* V6_M. */
11117 T(V6S_M
), /* V6S_M. */
11118 T(V7E_M
), /* V7E_M. */
11119 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
11121 const int *comb
[] =
11129 /* Pseudo-architecture. */
11133 /* Check we've not got a higher architecture than we know about. */
11135 if (oldtag
> MAX_TAG_CPU_ARCH
|| newtag
> MAX_TAG_CPU_ARCH
)
11137 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
11141 /* Override old tag if we have a Tag_also_compatible_with on the output. */
11143 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
11144 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
11145 oldtag
= T(V4T_PLUS_V6_M
);
11147 /* And override the new tag if we have a Tag_also_compatible_with on the
11150 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
11151 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
11152 newtag
= T(V4T_PLUS_V6_M
);
11154 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
11155 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
11157 /* Architectures before V6KZ add features monotonically. */
11158 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
11161 result
= comb
[tagh
- T(V6T2
)][tagl
];
11163 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
11164 as the canonical version. */
11165 if (result
== T(V4T_PLUS_V6_M
))
11168 *secondary_compat_out
= T(V6_M
);
11171 *secondary_compat_out
= -1;
11175 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
11176 ibfd
, oldtag
, newtag
);
11184 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
11185 are conflicting attributes. */
11188 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, bfd
*obfd
)
11190 obj_attribute
*in_attr
;
11191 obj_attribute
*out_attr
;
11192 /* Some tags have 0 = don't care, 1 = strong requirement,
11193 2 = weak requirement. */
11194 static const int order_021
[3] = {0, 2, 1};
11196 bfd_boolean result
= TRUE
;
11198 /* Skip the linker stubs file. This preserves previous behavior
11199 of accepting unknown attributes in the first input file - but
11201 if (ibfd
->flags
& BFD_LINKER_CREATED
)
11204 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
11206 /* This is the first object. Copy the attributes. */
11207 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
11209 out_attr
= elf_known_obj_attributes_proc (obfd
);
11211 /* Use the Tag_null value to indicate the attributes have been
11215 /* We do not output objects with Tag_MPextension_use_legacy - we move
11216 the attribute's value to Tag_MPextension_use. */
11217 if (out_attr
[Tag_MPextension_use_legacy
].i
!= 0)
11219 if (out_attr
[Tag_MPextension_use
].i
!= 0
11220 && out_attr
[Tag_MPextension_use_legacy
].i
11221 != out_attr
[Tag_MPextension_use
].i
)
11224 (_("Error: %B has both the current and legacy "
11225 "Tag_MPextension_use attributes"), ibfd
);
11229 out_attr
[Tag_MPextension_use
] =
11230 out_attr
[Tag_MPextension_use_legacy
];
11231 out_attr
[Tag_MPextension_use_legacy
].type
= 0;
11232 out_attr
[Tag_MPextension_use_legacy
].i
= 0;
11238 in_attr
= elf_known_obj_attributes_proc (ibfd
);
11239 out_attr
= elf_known_obj_attributes_proc (obfd
);
11240 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
11241 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
11243 /* Ignore mismatches if the object doesn't use floating point. */
11244 if (out_attr
[Tag_ABI_FP_number_model
].i
== 0)
11245 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
11246 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= 0)
11249 (_("error: %B uses VFP register arguments, %B does not"),
11250 in_attr
[Tag_ABI_VFP_args
].i
? ibfd
: obfd
,
11251 in_attr
[Tag_ABI_VFP_args
].i
? obfd
: ibfd
);
11256 for (i
= LEAST_KNOWN_OBJ_ATTRIBUTE
; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
11258 /* Merge this attribute with existing attributes. */
11261 case Tag_CPU_raw_name
:
11263 /* These are merged after Tag_CPU_arch. */
11266 case Tag_ABI_optimization_goals
:
11267 case Tag_ABI_FP_optimization_goals
:
11268 /* Use the first value seen. */
11273 int secondary_compat
= -1, secondary_compat_out
= -1;
11274 unsigned int saved_out_attr
= out_attr
[i
].i
;
11275 static const char *name_table
[] = {
11276 /* These aren't real CPU names, but we can't guess
11277 that from the architecture version alone. */
11293 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
11294 secondary_compat
= get_secondary_compatible_arch (ibfd
);
11295 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
11296 out_attr
[i
].i
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
11297 &secondary_compat_out
,
11300 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
11302 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
11303 if (out_attr
[i
].i
== saved_out_attr
)
11304 ; /* Leave the names alone. */
11305 else if (out_attr
[i
].i
== in_attr
[i
].i
)
11307 /* The output architecture has been changed to match the
11308 input architecture. Use the input names. */
11309 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
11310 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
11312 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
11313 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
11318 out_attr
[Tag_CPU_name
].s
= NULL
;
11319 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
11322 /* If we still don't have a value for Tag_CPU_name,
11323 make one up now. Tag_CPU_raw_name remains blank. */
11324 if (out_attr
[Tag_CPU_name
].s
== NULL
11325 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
11326 out_attr
[Tag_CPU_name
].s
=
11327 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
11331 case Tag_ARM_ISA_use
:
11332 case Tag_THUMB_ISA_use
:
11333 case Tag_WMMX_arch
:
11334 case Tag_Advanced_SIMD_arch
:
11335 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
11336 case Tag_ABI_FP_rounding
:
11337 case Tag_ABI_FP_exceptions
:
11338 case Tag_ABI_FP_user_exceptions
:
11339 case Tag_ABI_FP_number_model
:
11340 case Tag_FP_HP_extension
:
11341 case Tag_CPU_unaligned_access
:
11343 case Tag_MPextension_use
:
11344 /* Use the largest value specified. */
11345 if (in_attr
[i
].i
> out_attr
[i
].i
)
11346 out_attr
[i
].i
= in_attr
[i
].i
;
11349 case Tag_ABI_align_preserved
:
11350 case Tag_ABI_PCS_RO_data
:
11351 /* Use the smallest value specified. */
11352 if (in_attr
[i
].i
< out_attr
[i
].i
)
11353 out_attr
[i
].i
= in_attr
[i
].i
;
11356 case Tag_ABI_align_needed
:
11357 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
11358 && (in_attr
[Tag_ABI_align_preserved
].i
== 0
11359 || out_attr
[Tag_ABI_align_preserved
].i
== 0))
11361 /* This error message should be enabled once all non-conformant
11362 binaries in the toolchain have had the attributes set
11365 (_("error: %B: 8-byte data alignment conflicts with %B"),
11369 /* Fall through. */
11370 case Tag_ABI_FP_denormal
:
11371 case Tag_ABI_PCS_GOT_use
:
11372 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
11373 value if greater than 2 (for future-proofing). */
11374 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
11375 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
11376 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
11377 out_attr
[i
].i
= in_attr
[i
].i
;
11380 case Tag_Virtualization_use
:
11381 /* The virtualization tag effectively stores two bits of
11382 information: the intended use of TrustZone (in bit 0), and the
11383 intended use of Virtualization (in bit 1). */
11384 if (out_attr
[i
].i
== 0)
11385 out_attr
[i
].i
= in_attr
[i
].i
;
11386 else if (in_attr
[i
].i
!= 0
11387 && in_attr
[i
].i
!= out_attr
[i
].i
)
11389 if (in_attr
[i
].i
<= 3 && out_attr
[i
].i
<= 3)
11394 (_("error: %B: unable to merge virtualization attributes "
11402 case Tag_CPU_arch_profile
:
11403 if (out_attr
[i
].i
!= in_attr
[i
].i
)
11405 /* 0 will merge with anything.
11406 'A' and 'S' merge to 'A'.
11407 'R' and 'S' merge to 'R'.
11408 'M' and 'A|R|S' is an error. */
11409 if (out_attr
[i
].i
== 0
11410 || (out_attr
[i
].i
== 'S'
11411 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
11412 out_attr
[i
].i
= in_attr
[i
].i
;
11413 else if (in_attr
[i
].i
== 0
11414 || (in_attr
[i
].i
== 'S'
11415 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
11416 ; /* Do nothing. */
11420 (_("error: %B: Conflicting architecture profiles %c/%c"),
11422 in_attr
[i
].i
? in_attr
[i
].i
: '0',
11423 out_attr
[i
].i
? out_attr
[i
].i
: '0');
11430 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
11431 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
11432 when it's 0. It might mean absence of FP hardware if
11433 Tag_FP_arch is zero, otherwise it is effectively SP + DP. */
11435 static const struct
11439 } vfp_versions
[7] =
11453 /* If the output has no requirement about FP hardware,
11454 follow the requirement of the input. */
11455 if (out_attr
[i
].i
== 0)
11457 BFD_ASSERT (out_attr
[Tag_ABI_HardFP_use
].i
== 0);
11458 out_attr
[i
].i
= in_attr
[i
].i
;
11459 out_attr
[Tag_ABI_HardFP_use
].i
11460 = in_attr
[Tag_ABI_HardFP_use
].i
;
11463 /* If the input has no requirement about FP hardware, do
11465 else if (in_attr
[i
].i
== 0)
11467 BFD_ASSERT (in_attr
[Tag_ABI_HardFP_use
].i
== 0);
11471 /* Both the input and the output have nonzero Tag_FP_arch.
11472 So Tag_ABI_HardFP_use is (SP & DP) when it's zero. */
11474 /* If both the input and the output have zero Tag_ABI_HardFP_use,
11476 if (in_attr
[Tag_ABI_HardFP_use
].i
== 0
11477 && out_attr
[Tag_ABI_HardFP_use
].i
== 0)
11479 /* If the input and the output have different Tag_ABI_HardFP_use,
11480 the combination of them is 3 (SP & DP). */
11481 else if (in_attr
[Tag_ABI_HardFP_use
].i
11482 != out_attr
[Tag_ABI_HardFP_use
].i
)
11483 out_attr
[Tag_ABI_HardFP_use
].i
= 3;
11485 /* Now we can handle Tag_FP_arch. */
11487 /* Values greater than 6 aren't defined, so just pick the
11489 if (in_attr
[i
].i
> 6 && in_attr
[i
].i
> out_attr
[i
].i
)
11491 out_attr
[i
] = in_attr
[i
];
11494 /* The output uses the superset of input features
11495 (ISA version) and registers. */
11496 ver
= vfp_versions
[in_attr
[i
].i
].ver
;
11497 if (ver
< vfp_versions
[out_attr
[i
].i
].ver
)
11498 ver
= vfp_versions
[out_attr
[i
].i
].ver
;
11499 regs
= vfp_versions
[in_attr
[i
].i
].regs
;
11500 if (regs
< vfp_versions
[out_attr
[i
].i
].regs
)
11501 regs
= vfp_versions
[out_attr
[i
].i
].regs
;
11502 /* This assumes all possible supersets are also a valid
11504 for (newval
= 6; newval
> 0; newval
--)
11506 if (regs
== vfp_versions
[newval
].regs
11507 && ver
== vfp_versions
[newval
].ver
)
11510 out_attr
[i
].i
= newval
;
11513 case Tag_PCS_config
:
11514 if (out_attr
[i
].i
== 0)
11515 out_attr
[i
].i
= in_attr
[i
].i
;
11516 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
11518 /* It's sometimes ok to mix different configs, so this is only
11521 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
11524 case Tag_ABI_PCS_R9_use
:
11525 if (in_attr
[i
].i
!= out_attr
[i
].i
11526 && out_attr
[i
].i
!= AEABI_R9_unused
11527 && in_attr
[i
].i
!= AEABI_R9_unused
)
11530 (_("error: %B: Conflicting use of R9"), ibfd
);
11533 if (out_attr
[i
].i
== AEABI_R9_unused
)
11534 out_attr
[i
].i
= in_attr
[i
].i
;
11536 case Tag_ABI_PCS_RW_data
:
11537 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
11538 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
11539 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
11542 (_("error: %B: SB relative addressing conflicts with use of R9"),
11546 /* Use the smallest value specified. */
11547 if (in_attr
[i
].i
< out_attr
[i
].i
)
11548 out_attr
[i
].i
= in_attr
[i
].i
;
11550 case Tag_ABI_PCS_wchar_t
:
11551 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
11552 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
11555 (_("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"),
11556 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
11558 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
11559 out_attr
[i
].i
= in_attr
[i
].i
;
11561 case Tag_ABI_enum_size
:
11562 if (in_attr
[i
].i
!= AEABI_enum_unused
)
11564 if (out_attr
[i
].i
== AEABI_enum_unused
11565 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
11567 /* The existing object is compatible with anything.
11568 Use whatever requirements the new object has. */
11569 out_attr
[i
].i
= in_attr
[i
].i
;
11571 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
11572 && out_attr
[i
].i
!= in_attr
[i
].i
11573 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
11575 static const char *aeabi_enum_names
[] =
11576 { "", "variable-size", "32-bit", "" };
11577 const char *in_name
=
11578 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
11579 ? aeabi_enum_names
[in_attr
[i
].i
]
11581 const char *out_name
=
11582 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
11583 ? aeabi_enum_names
[out_attr
[i
].i
]
11586 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
11587 ibfd
, in_name
, out_name
);
11591 case Tag_ABI_VFP_args
:
11594 case Tag_ABI_WMMX_args
:
11595 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11598 (_("error: %B uses iWMMXt register arguments, %B does not"),
11603 case Tag_compatibility
:
11604 /* Merged in target-independent code. */
11606 case Tag_ABI_HardFP_use
:
11607 /* This is handled along with Tag_FP_arch. */
11609 case Tag_ABI_FP_16bit_format
:
11610 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
11612 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11615 (_("error: fp16 format mismatch between %B and %B"),
11620 if (in_attr
[i
].i
!= 0)
11621 out_attr
[i
].i
= in_attr
[i
].i
;
11625 /* This tag is set to zero if we can use UDIV and SDIV in Thumb
11626 mode on a v7-M or v7-R CPU; to one if we can not use UDIV or
11627 SDIV at all; and to two if we can use UDIV or SDIV on a v7-A
11628 CPU. We will merge as follows: If the input attribute's value
11629 is one then the output attribute's value remains unchanged. If
11630 the input attribute's value is zero or two then if the output
11631 attribute's value is one the output value is set to the input
11632 value, otherwise the output value must be the same as the
11634 if (in_attr
[i
].i
!= 1 && out_attr
[i
].i
!= 1)
11636 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11639 (_("DIV usage mismatch between %B and %B"),
11645 if (in_attr
[i
].i
!= 1)
11646 out_attr
[i
].i
= in_attr
[i
].i
;
11650 case Tag_MPextension_use_legacy
:
11651 /* We don't output objects with Tag_MPextension_use_legacy - we
11652 move the value to Tag_MPextension_use. */
11653 if (in_attr
[i
].i
!= 0 && in_attr
[Tag_MPextension_use
].i
!= 0)
11655 if (in_attr
[Tag_MPextension_use
].i
!= in_attr
[i
].i
)
11658 (_("%B has has both the current and legacy "
11659 "Tag_MPextension_use attributes"),
11665 if (in_attr
[i
].i
> out_attr
[Tag_MPextension_use
].i
)
11666 out_attr
[Tag_MPextension_use
] = in_attr
[i
];
11670 case Tag_nodefaults
:
11671 /* This tag is set if it exists, but the value is unused (and is
11672 typically zero). We don't actually need to do anything here -
11673 the merge happens automatically when the type flags are merged
11676 case Tag_also_compatible_with
:
11677 /* Already done in Tag_CPU_arch. */
11679 case Tag_conformance
:
11680 /* Keep the attribute if it matches. Throw it away otherwise.
11681 No attribute means no claim to conform. */
11682 if (!in_attr
[i
].s
|| !out_attr
[i
].s
11683 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
11684 out_attr
[i
].s
= NULL
;
11689 = result
&& _bfd_elf_merge_unknown_attribute_low (ibfd
, obfd
, i
);
11692 /* If out_attr was copied from in_attr then it won't have a type yet. */
11693 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
11694 out_attr
[i
].type
= in_attr
[i
].type
;
11697 /* Merge Tag_compatibility attributes and any common GNU ones. */
11698 if (!_bfd_elf_merge_object_attributes (ibfd
, obfd
))
11701 /* Check for any attributes not known on ARM. */
11702 result
&= _bfd_elf_merge_unknown_attribute_list (ibfd
, obfd
);
11708 /* Return TRUE if the two EABI versions are incompatible. */
11711 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
11713 /* v4 and v5 are the same spec before and after it was released,
11714 so allow mixing them. */
11715 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
11716 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
11719 return (iver
== over
);
11722 /* Merge backend specific data from an object file to the output
11723 object file when linking. */
11726 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
);
11728 /* Display the flags field. */
11731 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
11733 FILE * file
= (FILE *) ptr
;
11734 unsigned long flags
;
11736 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
11738 /* Print normal ELF private data. */
11739 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
11741 flags
= elf_elfheader (abfd
)->e_flags
;
11742 /* Ignore init flag - it may not be set, despite the flags field
11743 containing valid data. */
11745 /* xgettext:c-format */
11746 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
11748 switch (EF_ARM_EABI_VERSION (flags
))
11750 case EF_ARM_EABI_UNKNOWN
:
11751 /* The following flag bits are GNU extensions and not part of the
11752 official ARM ELF extended ABI. Hence they are only decoded if
11753 the EABI version is not set. */
11754 if (flags
& EF_ARM_INTERWORK
)
11755 fprintf (file
, _(" [interworking enabled]"));
11757 if (flags
& EF_ARM_APCS_26
)
11758 fprintf (file
, " [APCS-26]");
11760 fprintf (file
, " [APCS-32]");
11762 if (flags
& EF_ARM_VFP_FLOAT
)
11763 fprintf (file
, _(" [VFP float format]"));
11764 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
11765 fprintf (file
, _(" [Maverick float format]"));
11767 fprintf (file
, _(" [FPA float format]"));
11769 if (flags
& EF_ARM_APCS_FLOAT
)
11770 fprintf (file
, _(" [floats passed in float registers]"));
11772 if (flags
& EF_ARM_PIC
)
11773 fprintf (file
, _(" [position independent]"));
11775 if (flags
& EF_ARM_NEW_ABI
)
11776 fprintf (file
, _(" [new ABI]"));
11778 if (flags
& EF_ARM_OLD_ABI
)
11779 fprintf (file
, _(" [old ABI]"));
11781 if (flags
& EF_ARM_SOFT_FLOAT
)
11782 fprintf (file
, _(" [software FP]"));
11784 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
11785 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
11786 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
11787 | EF_ARM_MAVERICK_FLOAT
);
11790 case EF_ARM_EABI_VER1
:
11791 fprintf (file
, _(" [Version1 EABI]"));
11793 if (flags
& EF_ARM_SYMSARESORTED
)
11794 fprintf (file
, _(" [sorted symbol table]"));
11796 fprintf (file
, _(" [unsorted symbol table]"));
11798 flags
&= ~ EF_ARM_SYMSARESORTED
;
11801 case EF_ARM_EABI_VER2
:
11802 fprintf (file
, _(" [Version2 EABI]"));
11804 if (flags
& EF_ARM_SYMSARESORTED
)
11805 fprintf (file
, _(" [sorted symbol table]"));
11807 fprintf (file
, _(" [unsorted symbol table]"));
11809 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
11810 fprintf (file
, _(" [dynamic symbols use segment index]"));
11812 if (flags
& EF_ARM_MAPSYMSFIRST
)
11813 fprintf (file
, _(" [mapping symbols precede others]"));
11815 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
11816 | EF_ARM_MAPSYMSFIRST
);
11819 case EF_ARM_EABI_VER3
:
11820 fprintf (file
, _(" [Version3 EABI]"));
11823 case EF_ARM_EABI_VER4
:
11824 fprintf (file
, _(" [Version4 EABI]"));
11827 case EF_ARM_EABI_VER5
:
11828 fprintf (file
, _(" [Version5 EABI]"));
11830 if (flags
& EF_ARM_BE8
)
11831 fprintf (file
, _(" [BE8]"));
11833 if (flags
& EF_ARM_LE8
)
11834 fprintf (file
, _(" [LE8]"));
11836 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
11840 fprintf (file
, _(" <EABI version unrecognised>"));
11844 flags
&= ~ EF_ARM_EABIMASK
;
11846 if (flags
& EF_ARM_RELEXEC
)
11847 fprintf (file
, _(" [relocatable executable]"));
11849 if (flags
& EF_ARM_HASENTRY
)
11850 fprintf (file
, _(" [has entry point]"));
11852 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
11855 fprintf (file
, _("<Unrecognised flag bits set>"));
11857 fputc ('\n', file
);
11863 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
11865 switch (ELF_ST_TYPE (elf_sym
->st_info
))
11867 case STT_ARM_TFUNC
:
11868 return ELF_ST_TYPE (elf_sym
->st_info
);
11870 case STT_ARM_16BIT
:
11871 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
11872 This allows us to distinguish between data used by Thumb instructions
11873 and non-data (which is probably code) inside Thumb regions of an
11875 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
11876 return ELF_ST_TYPE (elf_sym
->st_info
);
11887 elf32_arm_gc_mark_hook (asection
*sec
,
11888 struct bfd_link_info
*info
,
11889 Elf_Internal_Rela
*rel
,
11890 struct elf_link_hash_entry
*h
,
11891 Elf_Internal_Sym
*sym
)
11894 switch (ELF32_R_TYPE (rel
->r_info
))
11896 case R_ARM_GNU_VTINHERIT
:
11897 case R_ARM_GNU_VTENTRY
:
11901 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
11904 /* Update the got entry reference counts for the section being removed. */
11907 elf32_arm_gc_sweep_hook (bfd
* abfd
,
11908 struct bfd_link_info
* info
,
11910 const Elf_Internal_Rela
* relocs
)
11912 Elf_Internal_Shdr
*symtab_hdr
;
11913 struct elf_link_hash_entry
**sym_hashes
;
11914 bfd_signed_vma
*local_got_refcounts
;
11915 const Elf_Internal_Rela
*rel
, *relend
;
11916 struct elf32_arm_link_hash_table
* globals
;
11918 if (info
->relocatable
)
11921 globals
= elf32_arm_hash_table (info
);
11922 if (globals
== NULL
)
11925 elf_section_data (sec
)->local_dynrel
= NULL
;
11927 symtab_hdr
= & elf_symtab_hdr (abfd
);
11928 sym_hashes
= elf_sym_hashes (abfd
);
11929 local_got_refcounts
= elf_local_got_refcounts (abfd
);
11931 check_use_blx (globals
);
11933 relend
= relocs
+ sec
->reloc_count
;
11934 for (rel
= relocs
; rel
< relend
; rel
++)
11936 unsigned long r_symndx
;
11937 struct elf_link_hash_entry
*h
= NULL
;
11938 struct elf32_arm_link_hash_entry
*eh
;
11940 bfd_boolean call_reloc_p
;
11941 bfd_boolean may_become_dynamic_p
;
11942 bfd_boolean may_need_local_target_p
;
11943 union gotplt_union
*root_plt
;
11944 struct arm_plt_info
*arm_plt
;
11946 r_symndx
= ELF32_R_SYM (rel
->r_info
);
11947 if (r_symndx
>= symtab_hdr
->sh_info
)
11949 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
11950 while (h
->root
.type
== bfd_link_hash_indirect
11951 || h
->root
.type
== bfd_link_hash_warning
)
11952 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11954 eh
= (struct elf32_arm_link_hash_entry
*) h
;
11956 call_reloc_p
= FALSE
;
11957 may_become_dynamic_p
= FALSE
;
11958 may_need_local_target_p
= FALSE
;
11960 r_type
= ELF32_R_TYPE (rel
->r_info
);
11961 r_type
= arm_real_reloc_type (globals
, r_type
);
11965 case R_ARM_GOT_PREL
:
11966 case R_ARM_TLS_GD32
:
11967 case R_ARM_TLS_IE32
:
11970 if (h
->got
.refcount
> 0)
11971 h
->got
.refcount
-= 1;
11973 else if (local_got_refcounts
!= NULL
)
11975 if (local_got_refcounts
[r_symndx
] > 0)
11976 local_got_refcounts
[r_symndx
] -= 1;
11980 case R_ARM_TLS_LDM32
:
11981 globals
->tls_ldm_got
.refcount
-= 1;
11989 case R_ARM_THM_CALL
:
11990 case R_ARM_THM_JUMP24
:
11991 case R_ARM_THM_JUMP19
:
11992 call_reloc_p
= TRUE
;
11993 may_need_local_target_p
= TRUE
;
11997 if (!globals
->vxworks_p
)
11999 may_need_local_target_p
= TRUE
;
12002 /* Fall through. */
12004 case R_ARM_ABS32_NOI
:
12006 case R_ARM_REL32_NOI
:
12007 case R_ARM_MOVW_ABS_NC
:
12008 case R_ARM_MOVT_ABS
:
12009 case R_ARM_MOVW_PREL_NC
:
12010 case R_ARM_MOVT_PREL
:
12011 case R_ARM_THM_MOVW_ABS_NC
:
12012 case R_ARM_THM_MOVT_ABS
:
12013 case R_ARM_THM_MOVW_PREL_NC
:
12014 case R_ARM_THM_MOVT_PREL
:
12015 /* Should the interworking branches be here also? */
12016 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
12017 && (sec
->flags
& SEC_ALLOC
) != 0)
12020 && (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
))
12022 call_reloc_p
= TRUE
;
12023 may_need_local_target_p
= TRUE
;
12026 may_become_dynamic_p
= TRUE
;
12029 may_need_local_target_p
= TRUE
;
12036 if (may_need_local_target_p
12037 && elf32_arm_get_plt_info (abfd
, eh
, r_symndx
, &root_plt
, &arm_plt
))
12039 BFD_ASSERT (root_plt
->refcount
> 0);
12040 root_plt
->refcount
-= 1;
12043 arm_plt
->noncall_refcount
--;
12045 if (r_type
== R_ARM_THM_CALL
)
12046 arm_plt
->maybe_thumb_refcount
--;
12048 if (r_type
== R_ARM_THM_JUMP24
12049 || r_type
== R_ARM_THM_JUMP19
)
12050 arm_plt
->thumb_refcount
--;
12053 if (may_become_dynamic_p
)
12055 struct elf_dyn_relocs
**pp
;
12056 struct elf_dyn_relocs
*p
;
12059 pp
= &(eh
->dyn_relocs
);
12062 Elf_Internal_Sym
*isym
;
12064 isym
= bfd_sym_from_r_symndx (&globals
->sym_cache
,
12068 pp
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
12072 for (; (p
= *pp
) != NULL
; pp
= &p
->next
)
12075 /* Everything must go for SEC. */
12085 /* Look through the relocs for a section during the first phase. */
12088 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
12089 asection
*sec
, const Elf_Internal_Rela
*relocs
)
12091 Elf_Internal_Shdr
*symtab_hdr
;
12092 struct elf_link_hash_entry
**sym_hashes
;
12093 const Elf_Internal_Rela
*rel
;
12094 const Elf_Internal_Rela
*rel_end
;
12097 struct elf32_arm_link_hash_table
*htab
;
12098 bfd_boolean call_reloc_p
;
12099 bfd_boolean may_become_dynamic_p
;
12100 bfd_boolean may_need_local_target_p
;
12101 unsigned long nsyms
;
12103 if (info
->relocatable
)
12106 BFD_ASSERT (is_arm_elf (abfd
));
12108 htab
= elf32_arm_hash_table (info
);
12114 /* Create dynamic sections for relocatable executables so that we can
12115 copy relocations. */
12116 if (htab
->root
.is_relocatable_executable
12117 && ! htab
->root
.dynamic_sections_created
)
12119 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
12123 if (htab
->root
.dynobj
== NULL
)
12124 htab
->root
.dynobj
= abfd
;
12125 if (!create_ifunc_sections (info
))
12128 dynobj
= htab
->root
.dynobj
;
12130 symtab_hdr
= & elf_symtab_hdr (abfd
);
12131 sym_hashes
= elf_sym_hashes (abfd
);
12132 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
12134 rel_end
= relocs
+ sec
->reloc_count
;
12135 for (rel
= relocs
; rel
< rel_end
; rel
++)
12137 Elf_Internal_Sym
*isym
;
12138 struct elf_link_hash_entry
*h
;
12139 struct elf32_arm_link_hash_entry
*eh
;
12140 unsigned long r_symndx
;
12143 r_symndx
= ELF32_R_SYM (rel
->r_info
);
12144 r_type
= ELF32_R_TYPE (rel
->r_info
);
12145 r_type
= arm_real_reloc_type (htab
, r_type
);
12147 if (r_symndx
>= nsyms
12148 /* PR 9934: It is possible to have relocations that do not
12149 refer to symbols, thus it is also possible to have an
12150 object file containing relocations but no symbol table. */
12151 && (r_symndx
> STN_UNDEF
|| nsyms
> 0))
12153 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
12162 if (r_symndx
< symtab_hdr
->sh_info
)
12164 /* A local symbol. */
12165 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
12172 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
12173 while (h
->root
.type
== bfd_link_hash_indirect
12174 || h
->root
.type
== bfd_link_hash_warning
)
12175 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12179 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12181 call_reloc_p
= FALSE
;
12182 may_become_dynamic_p
= FALSE
;
12183 may_need_local_target_p
= FALSE
;
12185 /* Could be done earlier, if h were already available. */
12186 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
12190 case R_ARM_GOT_PREL
:
12191 case R_ARM_TLS_GD32
:
12192 case R_ARM_TLS_IE32
:
12193 case R_ARM_TLS_GOTDESC
:
12194 case R_ARM_TLS_DESCSEQ
:
12195 case R_ARM_THM_TLS_DESCSEQ
:
12196 case R_ARM_TLS_CALL
:
12197 case R_ARM_THM_TLS_CALL
:
12198 /* This symbol requires a global offset table entry. */
12200 int tls_type
, old_tls_type
;
12204 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
12206 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
12208 case R_ARM_TLS_GOTDESC
:
12209 case R_ARM_TLS_CALL
: case R_ARM_THM_TLS_CALL
:
12210 case R_ARM_TLS_DESCSEQ
: case R_ARM_THM_TLS_DESCSEQ
:
12211 tls_type
= GOT_TLS_GDESC
; break;
12213 default: tls_type
= GOT_NORMAL
; break;
12219 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
12223 /* This is a global offset table entry for a local symbol. */
12224 if (!elf32_arm_allocate_local_sym_info (abfd
))
12226 elf_local_got_refcounts (abfd
)[r_symndx
] += 1;
12227 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
12230 /* If a variable is accessed with both tls methods, two
12231 slots may be created. */
12232 if (GOT_TLS_GD_ANY_P (old_tls_type
)
12233 && GOT_TLS_GD_ANY_P (tls_type
))
12234 tls_type
|= old_tls_type
;
12236 /* We will already have issued an error message if there
12237 is a TLS/non-TLS mismatch, based on the symbol
12238 type. So just combine any TLS types needed. */
12239 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
12240 && tls_type
!= GOT_NORMAL
)
12241 tls_type
|= old_tls_type
;
12243 /* If the symbol is accessed in both IE and GDESC
12244 method, we're able to relax. Turn off the GDESC flag,
12245 without messing up with any other kind of tls types
12246 that may be involved */
12247 if ((tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_GDESC
))
12248 tls_type
&= ~GOT_TLS_GDESC
;
12250 if (old_tls_type
!= tls_type
)
12253 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
12255 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
12258 /* Fall through. */
12260 case R_ARM_TLS_LDM32
:
12261 if (r_type
== R_ARM_TLS_LDM32
)
12262 htab
->tls_ldm_got
.refcount
++;
12263 /* Fall through. */
12265 case R_ARM_GOTOFF32
:
12267 if (htab
->root
.sgot
== NULL
12268 && !create_got_section (htab
->root
.dynobj
, info
))
12277 case R_ARM_THM_CALL
:
12278 case R_ARM_THM_JUMP24
:
12279 case R_ARM_THM_JUMP19
:
12280 call_reloc_p
= TRUE
;
12281 may_need_local_target_p
= TRUE
;
12285 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
12286 ldr __GOTT_INDEX__ offsets. */
12287 if (!htab
->vxworks_p
)
12289 may_need_local_target_p
= TRUE
;
12292 /* Fall through. */
12294 case R_ARM_MOVW_ABS_NC
:
12295 case R_ARM_MOVT_ABS
:
12296 case R_ARM_THM_MOVW_ABS_NC
:
12297 case R_ARM_THM_MOVT_ABS
:
12300 (*_bfd_error_handler
)
12301 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
12302 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
12303 (h
) ? h
->root
.root
.string
: "a local symbol");
12304 bfd_set_error (bfd_error_bad_value
);
12308 /* Fall through. */
12310 case R_ARM_ABS32_NOI
:
12312 case R_ARM_REL32_NOI
:
12313 case R_ARM_MOVW_PREL_NC
:
12314 case R_ARM_MOVT_PREL
:
12315 case R_ARM_THM_MOVW_PREL_NC
:
12316 case R_ARM_THM_MOVT_PREL
:
12318 /* Should the interworking branches be listed here? */
12319 if ((info
->shared
|| htab
->root
.is_relocatable_executable
)
12320 && (sec
->flags
& SEC_ALLOC
) != 0)
12323 && (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
))
12325 /* In shared libraries and relocatable executables,
12326 we treat local relative references as calls;
12327 see the related SYMBOL_CALLS_LOCAL code in
12328 allocate_dynrelocs. */
12329 call_reloc_p
= TRUE
;
12330 may_need_local_target_p
= TRUE
;
12333 /* We are creating a shared library or relocatable
12334 executable, and this is a reloc against a global symbol,
12335 or a non-PC-relative reloc against a local symbol.
12336 We may need to copy the reloc into the output. */
12337 may_become_dynamic_p
= TRUE
;
12340 may_need_local_target_p
= TRUE
;
12343 /* This relocation describes the C++ object vtable hierarchy.
12344 Reconstruct it for later use during GC. */
12345 case R_ARM_GNU_VTINHERIT
:
12346 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
12350 /* This relocation describes which C++ vtable entries are actually
12351 used. Record for later use during GC. */
12352 case R_ARM_GNU_VTENTRY
:
12353 BFD_ASSERT (h
!= NULL
);
12355 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
12363 /* We may need a .plt entry if the function this reloc
12364 refers to is in a different object, regardless of the
12365 symbol's type. We can't tell for sure yet, because
12366 something later might force the symbol local. */
12368 else if (may_need_local_target_p
)
12369 /* If this reloc is in a read-only section, we might
12370 need a copy reloc. We can't check reliably at this
12371 stage whether the section is read-only, as input
12372 sections have not yet been mapped to output sections.
12373 Tentatively set the flag for now, and correct in
12374 adjust_dynamic_symbol. */
12375 h
->non_got_ref
= 1;
12378 if (may_need_local_target_p
12379 && (h
!= NULL
|| ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
))
12381 union gotplt_union
*root_plt
;
12382 struct arm_plt_info
*arm_plt
;
12383 struct arm_local_iplt_info
*local_iplt
;
12387 root_plt
= &h
->plt
;
12388 arm_plt
= &eh
->plt
;
12392 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
12393 if (local_iplt
== NULL
)
12395 root_plt
= &local_iplt
->root
;
12396 arm_plt
= &local_iplt
->arm
;
12399 /* If the symbol is a function that doesn't bind locally,
12400 this relocation will need a PLT entry. */
12401 root_plt
->refcount
+= 1;
12404 arm_plt
->noncall_refcount
++;
12406 /* It's too early to use htab->use_blx here, so we have to
12407 record possible blx references separately from
12408 relocs that definitely need a thumb stub. */
12410 if (r_type
== R_ARM_THM_CALL
)
12411 arm_plt
->maybe_thumb_refcount
+= 1;
12413 if (r_type
== R_ARM_THM_JUMP24
12414 || r_type
== R_ARM_THM_JUMP19
)
12415 arm_plt
->thumb_refcount
+= 1;
12418 if (may_become_dynamic_p
)
12420 struct elf_dyn_relocs
*p
, **head
;
12422 /* Create a reloc section in dynobj. */
12423 if (sreloc
== NULL
)
12425 sreloc
= _bfd_elf_make_dynamic_reloc_section
12426 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
12428 if (sreloc
== NULL
)
12431 /* BPABI objects never have dynamic relocations mapped. */
12432 if (htab
->symbian_p
)
12436 flags
= bfd_get_section_flags (dynobj
, sreloc
);
12437 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
12438 bfd_set_section_flags (dynobj
, sreloc
, flags
);
12442 /* If this is a global symbol, count the number of
12443 relocations we need for this symbol. */
12445 head
= &((struct elf32_arm_link_hash_entry
*) h
)->dyn_relocs
;
12448 head
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
12454 if (p
== NULL
|| p
->sec
!= sec
)
12456 bfd_size_type amt
= sizeof *p
;
12458 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->root
.dynobj
, amt
);
12468 if (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
12477 /* Unwinding tables are not referenced directly. This pass marks them as
12478 required if the corresponding code section is marked. */
12481 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
12482 elf_gc_mark_hook_fn gc_mark_hook
)
12485 Elf_Internal_Shdr
**elf_shdrp
;
12488 _bfd_elf_gc_mark_extra_sections (info
, gc_mark_hook
);
12490 /* Marking EH data may cause additional code sections to be marked,
12491 requiring multiple passes. */
12496 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12500 if (! is_arm_elf (sub
))
12503 elf_shdrp
= elf_elfsections (sub
);
12504 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12506 Elf_Internal_Shdr
*hdr
;
12508 hdr
= &elf_section_data (o
)->this_hdr
;
12509 if (hdr
->sh_type
== SHT_ARM_EXIDX
12511 && hdr
->sh_link
< elf_numsections (sub
)
12513 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
12516 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12526 /* Treat mapping symbols as special target symbols. */
12529 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
12531 return bfd_is_arm_special_symbol_name (sym
->name
,
12532 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
12535 /* This is a copy of elf_find_function() from elf.c except that
12536 ARM mapping symbols are ignored when looking for function names
12537 and STT_ARM_TFUNC is considered to a function type. */
12540 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
12541 asection
* section
,
12542 asymbol
** symbols
,
12544 const char ** filename_ptr
,
12545 const char ** functionname_ptr
)
12547 const char * filename
= NULL
;
12548 asymbol
* func
= NULL
;
12549 bfd_vma low_func
= 0;
12552 for (p
= symbols
; *p
!= NULL
; p
++)
12554 elf_symbol_type
*q
;
12556 q
= (elf_symbol_type
*) *p
;
12558 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
12563 filename
= bfd_asymbol_name (&q
->symbol
);
12566 case STT_ARM_TFUNC
:
12568 /* Skip mapping symbols. */
12569 if ((q
->symbol
.flags
& BSF_LOCAL
)
12570 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
12571 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
12573 /* Fall through. */
12574 if (bfd_get_section (&q
->symbol
) == section
12575 && q
->symbol
.value
>= low_func
12576 && q
->symbol
.value
<= offset
)
12578 func
= (asymbol
*) q
;
12579 low_func
= q
->symbol
.value
;
12589 *filename_ptr
= filename
;
12590 if (functionname_ptr
)
12591 *functionname_ptr
= bfd_asymbol_name (func
);
12597 /* Find the nearest line to a particular section and offset, for error
12598 reporting. This code is a duplicate of the code in elf.c, except
12599 that it uses arm_elf_find_function. */
12602 elf32_arm_find_nearest_line (bfd
* abfd
,
12603 asection
* section
,
12604 asymbol
** symbols
,
12606 const char ** filename_ptr
,
12607 const char ** functionname_ptr
,
12608 unsigned int * line_ptr
)
12610 bfd_boolean found
= FALSE
;
12612 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
12614 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
12615 filename_ptr
, functionname_ptr
,
12617 & elf_tdata (abfd
)->dwarf2_find_line_info
))
12619 if (!*functionname_ptr
)
12620 arm_elf_find_function (abfd
, section
, symbols
, offset
,
12621 *filename_ptr
? NULL
: filename_ptr
,
12627 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
12628 & found
, filename_ptr
,
12629 functionname_ptr
, line_ptr
,
12630 & elf_tdata (abfd
)->line_info
))
12633 if (found
&& (*functionname_ptr
|| *line_ptr
))
12636 if (symbols
== NULL
)
12639 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
12640 filename_ptr
, functionname_ptr
))
12648 elf32_arm_find_inliner_info (bfd
* abfd
,
12649 const char ** filename_ptr
,
12650 const char ** functionname_ptr
,
12651 unsigned int * line_ptr
)
12654 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
12655 functionname_ptr
, line_ptr
,
12656 & elf_tdata (abfd
)->dwarf2_find_line_info
);
12660 /* Adjust a symbol defined by a dynamic object and referenced by a
12661 regular object. The current definition is in some section of the
12662 dynamic object, but we're not including those sections. We have to
12663 change the definition to something the rest of the link can
12667 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
12668 struct elf_link_hash_entry
* h
)
12672 struct elf32_arm_link_hash_entry
* eh
;
12673 struct elf32_arm_link_hash_table
*globals
;
12675 globals
= elf32_arm_hash_table (info
);
12676 if (globals
== NULL
)
12679 dynobj
= elf_hash_table (info
)->dynobj
;
12681 /* Make sure we know what is going on here. */
12682 BFD_ASSERT (dynobj
!= NULL
12684 || h
->type
== STT_GNU_IFUNC
12685 || h
->u
.weakdef
!= NULL
12688 && !h
->def_regular
)));
12690 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12692 /* If this is a function, put it in the procedure linkage table. We
12693 will fill in the contents of the procedure linkage table later,
12694 when we know the address of the .got section. */
12695 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
12697 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
12698 symbol binds locally. */
12699 if (h
->plt
.refcount
<= 0
12700 || (h
->type
!= STT_GNU_IFUNC
12701 && (SYMBOL_CALLS_LOCAL (info
, h
)
12702 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
12703 && h
->root
.type
== bfd_link_hash_undefweak
))))
12705 /* This case can occur if we saw a PLT32 reloc in an input
12706 file, but the symbol was never referred to by a dynamic
12707 object, or if all references were garbage collected. In
12708 such a case, we don't actually need to build a procedure
12709 linkage table, and we can just do a PC24 reloc instead. */
12710 h
->plt
.offset
= (bfd_vma
) -1;
12711 eh
->plt
.thumb_refcount
= 0;
12712 eh
->plt
.maybe_thumb_refcount
= 0;
12713 eh
->plt
.noncall_refcount
= 0;
12721 /* It's possible that we incorrectly decided a .plt reloc was
12722 needed for an R_ARM_PC24 or similar reloc to a non-function sym
12723 in check_relocs. We can't decide accurately between function
12724 and non-function syms in check-relocs; Objects loaded later in
12725 the link may change h->type. So fix it now. */
12726 h
->plt
.offset
= (bfd_vma
) -1;
12727 eh
->plt
.thumb_refcount
= 0;
12728 eh
->plt
.maybe_thumb_refcount
= 0;
12729 eh
->plt
.noncall_refcount
= 0;
12732 /* If this is a weak symbol, and there is a real definition, the
12733 processor independent code will have arranged for us to see the
12734 real definition first, and we can just use the same value. */
12735 if (h
->u
.weakdef
!= NULL
)
12737 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
12738 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
12739 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
12740 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
12744 /* If there are no non-GOT references, we do not need a copy
12746 if (!h
->non_got_ref
)
12749 /* This is a reference to a symbol defined by a dynamic object which
12750 is not a function. */
12752 /* If we are creating a shared library, we must presume that the
12753 only references to the symbol are via the global offset table.
12754 For such cases we need not do anything here; the relocations will
12755 be handled correctly by relocate_section. Relocatable executables
12756 can reference data in shared objects directly, so we don't need to
12757 do anything here. */
12758 if (info
->shared
|| globals
->root
.is_relocatable_executable
)
12763 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
12764 h
->root
.root
.string
);
12768 /* We must allocate the symbol in our .dynbss section, which will
12769 become part of the .bss section of the executable. There will be
12770 an entry for this symbol in the .dynsym section. The dynamic
12771 object will contain position independent code, so all references
12772 from the dynamic object to this symbol will go through the global
12773 offset table. The dynamic linker will use the .dynsym entry to
12774 determine the address it must put in the global offset table, so
12775 both the dynamic object and the regular object will refer to the
12776 same memory location for the variable. */
12777 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
12778 BFD_ASSERT (s
!= NULL
);
12780 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
12781 copy the initial value out of the dynamic object and into the
12782 runtime process image. We need to remember the offset into the
12783 .rel(a).bss section we are going to use. */
12784 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
12788 srel
= bfd_get_section_by_name (dynobj
, RELOC_SECTION (globals
, ".bss"));
12789 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
12793 return _bfd_elf_adjust_dynamic_copy (h
, s
);
12796 /* Allocate space in .plt, .got and associated reloc sections for
12800 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry
*h
, void * inf
)
12802 struct bfd_link_info
*info
;
12803 struct elf32_arm_link_hash_table
*htab
;
12804 struct elf32_arm_link_hash_entry
*eh
;
12805 struct elf_dyn_relocs
*p
;
12807 if (h
->root
.type
== bfd_link_hash_indirect
)
12810 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12812 info
= (struct bfd_link_info
*) inf
;
12813 htab
= elf32_arm_hash_table (info
);
12817 if ((htab
->root
.dynamic_sections_created
|| h
->type
== STT_GNU_IFUNC
)
12818 && h
->plt
.refcount
> 0)
12820 /* Make sure this symbol is output as a dynamic symbol.
12821 Undefined weak syms won't yet be marked as dynamic. */
12822 if (h
->dynindx
== -1
12823 && !h
->forced_local
)
12825 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
12829 /* If the call in the PLT entry binds locally, the associated
12830 GOT entry should use an R_ARM_IRELATIVE relocation instead of
12831 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
12832 than the .plt section. */
12833 if (h
->type
== STT_GNU_IFUNC
&& SYMBOL_CALLS_LOCAL (info
, h
))
12836 if (eh
->plt
.noncall_refcount
== 0
12837 && SYMBOL_REFERENCES_LOCAL (info
, h
))
12838 /* All non-call references can be resolved directly.
12839 This means that they can (and in some cases, must)
12840 resolve directly to the run-time target, rather than
12841 to the PLT. That in turns means that any .got entry
12842 would be equal to the .igot.plt entry, so there's
12843 no point having both. */
12844 h
->got
.refcount
= 0;
12849 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
12851 elf32_arm_allocate_plt_entry (info
, eh
->is_iplt
, &h
->plt
, &eh
->plt
);
12853 /* If this symbol is not defined in a regular file, and we are
12854 not generating a shared library, then set the symbol to this
12855 location in the .plt. This is required to make function
12856 pointers compare as equal between the normal executable and
12857 the shared library. */
12859 && !h
->def_regular
)
12861 h
->root
.u
.def
.section
= htab
->root
.splt
;
12862 h
->root
.u
.def
.value
= h
->plt
.offset
;
12864 /* Make sure the function is not marked as Thumb, in case
12865 it is the target of an ABS32 relocation, which will
12866 point to the PLT entry. */
12867 h
->target_internal
= ST_BRANCH_TO_ARM
;
12870 htab
->next_tls_desc_index
++;
12872 /* VxWorks executables have a second set of relocations for
12873 each PLT entry. They go in a separate relocation section,
12874 which is processed by the kernel loader. */
12875 if (htab
->vxworks_p
&& !info
->shared
)
12877 /* There is a relocation for the initial PLT entry:
12878 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
12879 if (h
->plt
.offset
== htab
->plt_header_size
)
12880 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 1);
12882 /* There are two extra relocations for each subsequent
12883 PLT entry: an R_ARM_32 relocation for the GOT entry,
12884 and an R_ARM_32 relocation for the PLT entry. */
12885 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 2);
12890 h
->plt
.offset
= (bfd_vma
) -1;
12896 h
->plt
.offset
= (bfd_vma
) -1;
12900 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12901 eh
->tlsdesc_got
= (bfd_vma
) -1;
12903 if (h
->got
.refcount
> 0)
12907 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
12910 /* Make sure this symbol is output as a dynamic symbol.
12911 Undefined weak syms won't yet be marked as dynamic. */
12912 if (h
->dynindx
== -1
12913 && !h
->forced_local
)
12915 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
12919 if (!htab
->symbian_p
)
12921 s
= htab
->root
.sgot
;
12922 h
->got
.offset
= s
->size
;
12924 if (tls_type
== GOT_UNKNOWN
)
12927 if (tls_type
== GOT_NORMAL
)
12928 /* Non-TLS symbols need one GOT slot. */
12932 if (tls_type
& GOT_TLS_GDESC
)
12934 /* R_ARM_TLS_DESC needs 2 GOT slots. */
12936 = (htab
->root
.sgotplt
->size
12937 - elf32_arm_compute_jump_table_size (htab
));
12938 htab
->root
.sgotplt
->size
+= 8;
12939 h
->got
.offset
= (bfd_vma
) -2;
12940 /* plt.got_offset needs to know there's a TLS_DESC
12941 reloc in the middle of .got.plt. */
12942 htab
->num_tls_desc
++;
12945 if (tls_type
& GOT_TLS_GD
)
12947 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
12948 the symbol is both GD and GDESC, got.offset may
12949 have been overwritten. */
12950 h
->got
.offset
= s
->size
;
12954 if (tls_type
& GOT_TLS_IE
)
12955 /* R_ARM_TLS_IE32 needs one GOT slot. */
12959 dyn
= htab
->root
.dynamic_sections_created
;
12962 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
12964 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
12967 if (tls_type
!= GOT_NORMAL
12968 && (info
->shared
|| indx
!= 0)
12969 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
12970 || h
->root
.type
!= bfd_link_hash_undefweak
))
12972 if (tls_type
& GOT_TLS_IE
)
12973 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
12975 if (tls_type
& GOT_TLS_GD
)
12976 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
12978 if (tls_type
& GOT_TLS_GDESC
)
12980 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
12981 /* GDESC needs a trampoline to jump to. */
12982 htab
->tls_trampoline
= -1;
12985 /* Only GD needs it. GDESC just emits one relocation per
12987 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
12988 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
12990 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
))
12992 if (htab
->root
.dynamic_sections_created
)
12993 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
12994 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
12996 else if (h
->type
== STT_GNU_IFUNC
12997 && eh
->plt
.noncall_refcount
== 0)
12998 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
12999 they all resolve dynamically instead. Reserve room for the
13000 GOT entry's R_ARM_IRELATIVE relocation. */
13001 elf32_arm_allocate_irelocs (info
, htab
->root
.srelgot
, 1);
13002 else if (info
->shared
)
13003 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
13004 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13008 h
->got
.offset
= (bfd_vma
) -1;
13010 /* Allocate stubs for exported Thumb functions on v4t. */
13011 if (!htab
->use_blx
&& h
->dynindx
!= -1
13013 && h
->target_internal
== ST_BRANCH_TO_THUMB
13014 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
13016 struct elf_link_hash_entry
* th
;
13017 struct bfd_link_hash_entry
* bh
;
13018 struct elf_link_hash_entry
* myh
;
13022 /* Create a new symbol to regist the real location of the function. */
13023 s
= h
->root
.u
.def
.section
;
13024 sprintf (name
, "__real_%s", h
->root
.root
.string
);
13025 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
13026 name
, BSF_GLOBAL
, s
,
13027 h
->root
.u
.def
.value
,
13028 NULL
, TRUE
, FALSE
, &bh
);
13030 myh
= (struct elf_link_hash_entry
*) bh
;
13031 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
13032 myh
->forced_local
= 1;
13033 myh
->target_internal
= ST_BRANCH_TO_THUMB
;
13034 eh
->export_glue
= myh
;
13035 th
= record_arm_to_thumb_glue (info
, h
);
13036 /* Point the symbol at the stub. */
13037 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
13038 h
->target_internal
= ST_BRANCH_TO_ARM
;
13039 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
13040 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
13043 if (eh
->dyn_relocs
== NULL
)
13046 /* In the shared -Bsymbolic case, discard space allocated for
13047 dynamic pc-relative relocs against symbols which turn out to be
13048 defined in regular objects. For the normal shared case, discard
13049 space for pc-relative relocs that have become local due to symbol
13050 visibility changes. */
13052 if (info
->shared
|| htab
->root
.is_relocatable_executable
)
13054 /* The only relocs that use pc_count are R_ARM_REL32 and
13055 R_ARM_REL32_NOI, which will appear on something like
13056 ".long foo - .". We want calls to protected symbols to resolve
13057 directly to the function rather than going via the plt. If people
13058 want function pointer comparisons to work as expected then they
13059 should avoid writing assembly like ".long foo - .". */
13060 if (SYMBOL_CALLS_LOCAL (info
, h
))
13062 struct elf_dyn_relocs
**pp
;
13064 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
13066 p
->count
-= p
->pc_count
;
13075 if (htab
->vxworks_p
)
13077 struct elf_dyn_relocs
**pp
;
13079 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
13081 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
13088 /* Also discard relocs on undefined weak syms with non-default
13090 if (eh
->dyn_relocs
!= NULL
13091 && h
->root
.type
== bfd_link_hash_undefweak
)
13093 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
13094 eh
->dyn_relocs
= NULL
;
13096 /* Make sure undefined weak symbols are output as a dynamic
13098 else if (h
->dynindx
== -1
13099 && !h
->forced_local
)
13101 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13106 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
13107 && h
->root
.type
== bfd_link_hash_new
)
13109 /* Output absolute symbols so that we can create relocations
13110 against them. For normal symbols we output a relocation
13111 against the section that contains them. */
13112 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13119 /* For the non-shared case, discard space for relocs against
13120 symbols which turn out to need copy relocs or are not
13123 if (!h
->non_got_ref
13124 && ((h
->def_dynamic
13125 && !h
->def_regular
)
13126 || (htab
->root
.dynamic_sections_created
13127 && (h
->root
.type
== bfd_link_hash_undefweak
13128 || h
->root
.type
== bfd_link_hash_undefined
))))
13130 /* Make sure this symbol is output as a dynamic symbol.
13131 Undefined weak syms won't yet be marked as dynamic. */
13132 if (h
->dynindx
== -1
13133 && !h
->forced_local
)
13135 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13139 /* If that succeeded, we know we'll be keeping all the
13141 if (h
->dynindx
!= -1)
13145 eh
->dyn_relocs
= NULL
;
13150 /* Finally, allocate space. */
13151 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13153 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
13154 if (h
->type
== STT_GNU_IFUNC
13155 && eh
->plt
.noncall_refcount
== 0
13156 && SYMBOL_REFERENCES_LOCAL (info
, h
))
13157 elf32_arm_allocate_irelocs (info
, sreloc
, p
->count
);
13159 elf32_arm_allocate_dynrelocs (info
, sreloc
, p
->count
);
13165 /* Find any dynamic relocs that apply to read-only sections. */
13168 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
13170 struct elf32_arm_link_hash_entry
* eh
;
13171 struct elf_dyn_relocs
* p
;
13173 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13174 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13176 asection
*s
= p
->sec
;
13178 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
13180 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
13182 info
->flags
|= DF_TEXTREL
;
13184 /* Not an error, just cut short the traversal. */
13192 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
13195 struct elf32_arm_link_hash_table
*globals
;
13197 globals
= elf32_arm_hash_table (info
);
13198 if (globals
== NULL
)
13201 globals
->byteswap_code
= byteswap_code
;
13204 /* Set the sizes of the dynamic sections. */
13207 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
13208 struct bfd_link_info
* info
)
13213 bfd_boolean relocs
;
13215 struct elf32_arm_link_hash_table
*htab
;
13217 htab
= elf32_arm_hash_table (info
);
13221 dynobj
= elf_hash_table (info
)->dynobj
;
13222 BFD_ASSERT (dynobj
!= NULL
);
13223 check_use_blx (htab
);
13225 if (elf_hash_table (info
)->dynamic_sections_created
)
13227 /* Set the contents of the .interp section to the interpreter. */
13228 if (info
->executable
)
13230 s
= bfd_get_section_by_name (dynobj
, ".interp");
13231 BFD_ASSERT (s
!= NULL
);
13232 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
13233 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
13237 /* Set up .got offsets for local syms, and space for local dynamic
13239 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
13241 bfd_signed_vma
*local_got
;
13242 bfd_signed_vma
*end_local_got
;
13243 struct arm_local_iplt_info
**local_iplt_ptr
, *local_iplt
;
13244 char *local_tls_type
;
13245 bfd_vma
*local_tlsdesc_gotent
;
13246 bfd_size_type locsymcount
;
13247 Elf_Internal_Shdr
*symtab_hdr
;
13249 bfd_boolean is_vxworks
= htab
->vxworks_p
;
13250 unsigned int symndx
;
13252 if (! is_arm_elf (ibfd
))
13255 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
13257 struct elf_dyn_relocs
*p
;
13259 for (p
= (struct elf_dyn_relocs
*)
13260 elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
13262 if (!bfd_is_abs_section (p
->sec
)
13263 && bfd_is_abs_section (p
->sec
->output_section
))
13265 /* Input section has been discarded, either because
13266 it is a copy of a linkonce section or due to
13267 linker script /DISCARD/, so we'll be discarding
13270 else if (is_vxworks
13271 && strcmp (p
->sec
->output_section
->name
,
13274 /* Relocations in vxworks .tls_vars sections are
13275 handled specially by the loader. */
13277 else if (p
->count
!= 0)
13279 srel
= elf_section_data (p
->sec
)->sreloc
;
13280 elf32_arm_allocate_dynrelocs (info
, srel
, p
->count
);
13281 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
13282 info
->flags
|= DF_TEXTREL
;
13287 local_got
= elf_local_got_refcounts (ibfd
);
13291 symtab_hdr
= & elf_symtab_hdr (ibfd
);
13292 locsymcount
= symtab_hdr
->sh_info
;
13293 end_local_got
= local_got
+ locsymcount
;
13294 local_iplt_ptr
= elf32_arm_local_iplt (ibfd
);
13295 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
13296 local_tlsdesc_gotent
= elf32_arm_local_tlsdesc_gotent (ibfd
);
13298 s
= htab
->root
.sgot
;
13299 srel
= htab
->root
.srelgot
;
13300 for (; local_got
< end_local_got
;
13301 ++local_got
, ++local_iplt_ptr
, ++local_tls_type
,
13302 ++local_tlsdesc_gotent
, ++symndx
)
13304 *local_tlsdesc_gotent
= (bfd_vma
) -1;
13305 local_iplt
= *local_iplt_ptr
;
13306 if (local_iplt
!= NULL
)
13308 struct elf_dyn_relocs
*p
;
13310 if (local_iplt
->root
.refcount
> 0)
13312 elf32_arm_allocate_plt_entry (info
, TRUE
,
13315 if (local_iplt
->arm
.noncall_refcount
== 0)
13316 /* All references to the PLT are calls, so all
13317 non-call references can resolve directly to the
13318 run-time target. This means that the .got entry
13319 would be the same as the .igot.plt entry, so there's
13320 no point creating both. */
13325 BFD_ASSERT (local_iplt
->arm
.noncall_refcount
== 0);
13326 local_iplt
->root
.offset
= (bfd_vma
) -1;
13329 for (p
= local_iplt
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13333 psrel
= elf_section_data (p
->sec
)->sreloc
;
13334 if (local_iplt
->arm
.noncall_refcount
== 0)
13335 elf32_arm_allocate_irelocs (info
, psrel
, p
->count
);
13337 elf32_arm_allocate_dynrelocs (info
, psrel
, p
->count
);
13340 if (*local_got
> 0)
13342 Elf_Internal_Sym
*isym
;
13344 *local_got
= s
->size
;
13345 if (*local_tls_type
& GOT_TLS_GD
)
13346 /* TLS_GD relocs need an 8-byte structure in the GOT. */
13348 if (*local_tls_type
& GOT_TLS_GDESC
)
13350 *local_tlsdesc_gotent
= htab
->root
.sgotplt
->size
13351 - elf32_arm_compute_jump_table_size (htab
);
13352 htab
->root
.sgotplt
->size
+= 8;
13353 *local_got
= (bfd_vma
) -2;
13354 /* plt.got_offset needs to know there's a TLS_DESC
13355 reloc in the middle of .got.plt. */
13356 htab
->num_tls_desc
++;
13358 if (*local_tls_type
& GOT_TLS_IE
)
13361 if (*local_tls_type
& GOT_NORMAL
)
13363 /* If the symbol is both GD and GDESC, *local_got
13364 may have been overwritten. */
13365 *local_got
= s
->size
;
13369 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, symndx
);
13373 /* If all references to an STT_GNU_IFUNC PLT are calls,
13374 then all non-call references, including this GOT entry,
13375 resolve directly to the run-time target. */
13376 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
13377 && (local_iplt
== NULL
13378 || local_iplt
->arm
.noncall_refcount
== 0))
13379 elf32_arm_allocate_irelocs (info
, srel
, 1);
13380 else if ((info
->shared
&& !(*local_tls_type
& GOT_TLS_GDESC
))
13381 || *local_tls_type
& GOT_TLS_GD
)
13382 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
13384 if (info
->shared
&& *local_tls_type
& GOT_TLS_GDESC
)
13386 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
13387 htab
->tls_trampoline
= -1;
13391 *local_got
= (bfd_vma
) -1;
13395 if (htab
->tls_ldm_got
.refcount
> 0)
13397 /* Allocate two GOT entries and one dynamic relocation (if necessary)
13398 for R_ARM_TLS_LDM32 relocations. */
13399 htab
->tls_ldm_got
.offset
= htab
->root
.sgot
->size
;
13400 htab
->root
.sgot
->size
+= 8;
13402 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13405 htab
->tls_ldm_got
.offset
= -1;
13407 /* Allocate global sym .plt and .got entries, and space for global
13408 sym dynamic relocs. */
13409 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs_for_symbol
, info
);
13411 /* Here we rummage through the found bfds to collect glue information. */
13412 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
13414 if (! is_arm_elf (ibfd
))
13417 /* Initialise mapping tables for code/data. */
13418 bfd_elf32_arm_init_maps (ibfd
);
13420 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
13421 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
))
13422 /* xgettext:c-format */
13423 _bfd_error_handler (_("Errors encountered processing file %s"),
13427 /* Allocate space for the glue sections now that we've sized them. */
13428 bfd_elf32_arm_allocate_interworking_sections (info
);
13430 /* For every jump slot reserved in the sgotplt, reloc_count is
13431 incremented. However, when we reserve space for TLS descriptors,
13432 it's not incremented, so in order to compute the space reserved
13433 for them, it suffices to multiply the reloc count by the jump
13435 if (htab
->root
.srelplt
)
13436 htab
->sgotplt_jump_table_size
= elf32_arm_compute_jump_table_size(htab
);
13438 if (htab
->tls_trampoline
)
13440 if (htab
->root
.splt
->size
== 0)
13441 htab
->root
.splt
->size
+= htab
->plt_header_size
;
13443 htab
->tls_trampoline
= htab
->root
.splt
->size
;
13444 htab
->root
.splt
->size
+= htab
->plt_entry_size
;
13446 /* If we're not using lazy TLS relocations, don't generate the
13447 PLT and GOT entries they require. */
13448 if (!(info
->flags
& DF_BIND_NOW
))
13450 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
13451 htab
->root
.sgot
->size
+= 4;
13453 htab
->dt_tlsdesc_plt
= htab
->root
.splt
->size
;
13454 htab
->root
.splt
->size
+= 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline
);
13458 /* The check_relocs and adjust_dynamic_symbol entry points have
13459 determined the sizes of the various dynamic sections. Allocate
13460 memory for them. */
13463 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
13467 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
13470 /* It's OK to base decisions on the section name, because none
13471 of the dynobj section names depend upon the input files. */
13472 name
= bfd_get_section_name (dynobj
, s
);
13474 if (s
== htab
->root
.splt
)
13476 /* Remember whether there is a PLT. */
13477 plt
= s
->size
!= 0;
13479 else if (CONST_STRNEQ (name
, ".rel"))
13483 /* Remember whether there are any reloc sections other
13484 than .rel(a).plt and .rela.plt.unloaded. */
13485 if (s
!= htab
->root
.srelplt
&& s
!= htab
->srelplt2
)
13488 /* We use the reloc_count field as a counter if we need
13489 to copy relocs into the output file. */
13490 s
->reloc_count
= 0;
13493 else if (s
!= htab
->root
.sgot
13494 && s
!= htab
->root
.sgotplt
13495 && s
!= htab
->root
.iplt
13496 && s
!= htab
->root
.igotplt
13497 && s
!= htab
->sdynbss
)
13499 /* It's not one of our sections, so don't allocate space. */
13505 /* If we don't need this section, strip it from the
13506 output file. This is mostly to handle .rel(a).bss and
13507 .rel(a).plt. We must create both sections in
13508 create_dynamic_sections, because they must be created
13509 before the linker maps input sections to output
13510 sections. The linker does that before
13511 adjust_dynamic_symbol is called, and it is that
13512 function which decides whether anything needs to go
13513 into these sections. */
13514 s
->flags
|= SEC_EXCLUDE
;
13518 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
13521 /* Allocate memory for the section contents. */
13522 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
13523 if (s
->contents
== NULL
)
13527 if (elf_hash_table (info
)->dynamic_sections_created
)
13529 /* Add some entries to the .dynamic section. We fill in the
13530 values later, in elf32_arm_finish_dynamic_sections, but we
13531 must add the entries now so that we get the correct size for
13532 the .dynamic section. The DT_DEBUG entry is filled in by the
13533 dynamic linker and used by the debugger. */
13534 #define add_dynamic_entry(TAG, VAL) \
13535 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
13537 if (info
->executable
)
13539 if (!add_dynamic_entry (DT_DEBUG
, 0))
13545 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
13546 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
13547 || !add_dynamic_entry (DT_PLTREL
,
13548 htab
->use_rel
? DT_REL
: DT_RELA
)
13549 || !add_dynamic_entry (DT_JMPREL
, 0))
13552 if (htab
->dt_tlsdesc_plt
&&
13553 (!add_dynamic_entry (DT_TLSDESC_PLT
,0)
13554 || !add_dynamic_entry (DT_TLSDESC_GOT
,0)))
13562 if (!add_dynamic_entry (DT_REL
, 0)
13563 || !add_dynamic_entry (DT_RELSZ
, 0)
13564 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
13569 if (!add_dynamic_entry (DT_RELA
, 0)
13570 || !add_dynamic_entry (DT_RELASZ
, 0)
13571 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
13576 /* If any dynamic relocs apply to a read-only section,
13577 then we need a DT_TEXTREL entry. */
13578 if ((info
->flags
& DF_TEXTREL
) == 0)
13579 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
13582 if ((info
->flags
& DF_TEXTREL
) != 0)
13584 if (!add_dynamic_entry (DT_TEXTREL
, 0))
13587 if (htab
->vxworks_p
13588 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
13591 #undef add_dynamic_entry
13596 /* Size sections even though they're not dynamic. We use it to setup
13597 _TLS_MODULE_BASE_, if needed. */
13600 elf32_arm_always_size_sections (bfd
*output_bfd
,
13601 struct bfd_link_info
*info
)
13605 if (info
->relocatable
)
13608 tls_sec
= elf_hash_table (info
)->tls_sec
;
13612 struct elf_link_hash_entry
*tlsbase
;
13614 tlsbase
= elf_link_hash_lookup
13615 (elf_hash_table (info
), "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
13619 struct bfd_link_hash_entry
*bh
= NULL
;
13620 const struct elf_backend_data
*bed
13621 = get_elf_backend_data (output_bfd
);
13623 if (!(_bfd_generic_link_add_one_symbol
13624 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
13625 tls_sec
, 0, NULL
, FALSE
,
13626 bed
->collect
, &bh
)))
13629 tlsbase
->type
= STT_TLS
;
13630 tlsbase
= (struct elf_link_hash_entry
*)bh
;
13631 tlsbase
->def_regular
= 1;
13632 tlsbase
->other
= STV_HIDDEN
;
13633 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
13639 /* Finish up dynamic symbol handling. We set the contents of various
13640 dynamic sections here. */
13643 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
13644 struct bfd_link_info
* info
,
13645 struct elf_link_hash_entry
* h
,
13646 Elf_Internal_Sym
* sym
)
13648 struct elf32_arm_link_hash_table
*htab
;
13649 struct elf32_arm_link_hash_entry
*eh
;
13651 htab
= elf32_arm_hash_table (info
);
13655 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13657 if (h
->plt
.offset
!= (bfd_vma
) -1)
13661 BFD_ASSERT (h
->dynindx
!= -1);
13662 elf32_arm_populate_plt_entry (output_bfd
, info
, &h
->plt
, &eh
->plt
,
13666 if (!h
->def_regular
)
13668 /* Mark the symbol as undefined, rather than as defined in
13669 the .plt section. Leave the value alone. */
13670 sym
->st_shndx
= SHN_UNDEF
;
13671 /* If the symbol is weak, we do need to clear the value.
13672 Otherwise, the PLT entry would provide a definition for
13673 the symbol even if the symbol wasn't defined anywhere,
13674 and so the symbol would never be NULL. */
13675 if (!h
->ref_regular_nonweak
)
13678 else if (eh
->is_iplt
&& eh
->plt
.noncall_refcount
!= 0)
13680 /* At least one non-call relocation references this .iplt entry,
13681 so the .iplt entry is the function's canonical address. */
13682 sym
->st_info
= ELF_ST_INFO (ELF_ST_BIND (sym
->st_info
), STT_FUNC
);
13683 sym
->st_target_internal
= ST_BRANCH_TO_ARM
;
13684 sym
->st_shndx
= (_bfd_elf_section_from_bfd_section
13685 (output_bfd
, htab
->root
.iplt
->output_section
));
13686 sym
->st_value
= (h
->plt
.offset
13687 + htab
->root
.iplt
->output_section
->vma
13688 + htab
->root
.iplt
->output_offset
);
13695 Elf_Internal_Rela rel
;
13697 /* This symbol needs a copy reloc. Set it up. */
13698 BFD_ASSERT (h
->dynindx
!= -1
13699 && (h
->root
.type
== bfd_link_hash_defined
13700 || h
->root
.type
== bfd_link_hash_defweak
));
13703 BFD_ASSERT (s
!= NULL
);
13706 rel
.r_offset
= (h
->root
.u
.def
.value
13707 + h
->root
.u
.def
.section
->output_section
->vma
13708 + h
->root
.u
.def
.section
->output_offset
);
13709 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
13710 elf32_arm_add_dynreloc (output_bfd
, info
, s
, &rel
);
13713 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
13714 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
13715 to the ".got" section. */
13716 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
13717 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
13718 sym
->st_shndx
= SHN_ABS
;
13724 arm_put_trampoline (struct elf32_arm_link_hash_table
*htab
, bfd
*output_bfd
,
13726 const unsigned long *template, unsigned count
)
13730 for (ix
= 0; ix
!= count
; ix
++)
13732 unsigned long insn
= template[ix
];
13734 /* Emit mov pc,rx if bx is not permitted. */
13735 if (htab
->fix_v4bx
== 1 && (insn
& 0x0ffffff0) == 0x012fff10)
13736 insn
= (insn
& 0xf000000f) | 0x01a0f000;
13737 put_arm_insn (htab
, output_bfd
, insn
, (char *)contents
+ ix
*4);
13741 /* Finish up the dynamic sections. */
13744 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
13749 struct elf32_arm_link_hash_table
*htab
;
13751 htab
= elf32_arm_hash_table (info
);
13755 dynobj
= elf_hash_table (info
)->dynobj
;
13757 sgot
= htab
->root
.sgotplt
;
13758 /* A broken linker script might have discarded the dynamic sections.
13759 Catch this here so that we do not seg-fault later on. */
13760 if (sgot
!= NULL
&& bfd_is_abs_section (sgot
->output_section
))
13762 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
13764 if (elf_hash_table (info
)->dynamic_sections_created
)
13767 Elf32_External_Dyn
*dyncon
, *dynconend
;
13769 splt
= htab
->root
.splt
;
13770 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
13771 BFD_ASSERT (htab
->symbian_p
|| sgot
!= NULL
);
13773 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
13774 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
13776 for (; dyncon
< dynconend
; dyncon
++)
13778 Elf_Internal_Dyn dyn
;
13782 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
13789 if (htab
->vxworks_p
13790 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
13791 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13796 goto get_vma_if_bpabi
;
13799 goto get_vma_if_bpabi
;
13802 goto get_vma_if_bpabi
;
13804 name
= ".gnu.version";
13805 goto get_vma_if_bpabi
;
13807 name
= ".gnu.version_d";
13808 goto get_vma_if_bpabi
;
13810 name
= ".gnu.version_r";
13811 goto get_vma_if_bpabi
;
13817 name
= RELOC_SECTION (htab
, ".plt");
13819 s
= bfd_get_section_by_name (output_bfd
, name
);
13820 BFD_ASSERT (s
!= NULL
);
13821 if (!htab
->symbian_p
)
13822 dyn
.d_un
.d_ptr
= s
->vma
;
13824 /* In the BPABI, tags in the PT_DYNAMIC section point
13825 at the file offset, not the memory address, for the
13826 convenience of the post linker. */
13827 dyn
.d_un
.d_ptr
= s
->filepos
;
13828 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13832 if (htab
->symbian_p
)
13837 s
= htab
->root
.srelplt
;
13838 BFD_ASSERT (s
!= NULL
);
13839 dyn
.d_un
.d_val
= s
->size
;
13840 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13845 if (!htab
->symbian_p
)
13847 /* My reading of the SVR4 ABI indicates that the
13848 procedure linkage table relocs (DT_JMPREL) should be
13849 included in the overall relocs (DT_REL). This is
13850 what Solaris does. However, UnixWare can not handle
13851 that case. Therefore, we override the DT_RELSZ entry
13852 here to make it not include the JMPREL relocs. Since
13853 the linker script arranges for .rel(a).plt to follow all
13854 other relocation sections, we don't have to worry
13855 about changing the DT_REL entry. */
13856 s
= htab
->root
.srelplt
;
13858 dyn
.d_un
.d_val
-= s
->size
;
13859 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13862 /* Fall through. */
13866 /* In the BPABI, the DT_REL tag must point at the file
13867 offset, not the VMA, of the first relocation
13868 section. So, we use code similar to that in
13869 elflink.c, but do not check for SHF_ALLOC on the
13870 relcoation section, since relocations sections are
13871 never allocated under the BPABI. The comments above
13872 about Unixware notwithstanding, we include all of the
13873 relocations here. */
13874 if (htab
->symbian_p
)
13877 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
13878 ? SHT_REL
: SHT_RELA
);
13879 dyn
.d_un
.d_val
= 0;
13880 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
13882 Elf_Internal_Shdr
*hdr
13883 = elf_elfsections (output_bfd
)[i
];
13884 if (hdr
->sh_type
== type
)
13886 if (dyn
.d_tag
== DT_RELSZ
13887 || dyn
.d_tag
== DT_RELASZ
)
13888 dyn
.d_un
.d_val
+= hdr
->sh_size
;
13889 else if ((ufile_ptr
) hdr
->sh_offset
13890 <= dyn
.d_un
.d_val
- 1)
13891 dyn
.d_un
.d_val
= hdr
->sh_offset
;
13894 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13898 case DT_TLSDESC_PLT
:
13899 s
= htab
->root
.splt
;
13900 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
13901 + htab
->dt_tlsdesc_plt
);
13902 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13905 case DT_TLSDESC_GOT
:
13906 s
= htab
->root
.sgot
;
13907 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
13908 + htab
->dt_tlsdesc_got
);
13909 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13912 /* Set the bottom bit of DT_INIT/FINI if the
13913 corresponding function is Thumb. */
13915 name
= info
->init_function
;
13918 name
= info
->fini_function
;
13920 /* If it wasn't set by elf_bfd_final_link
13921 then there is nothing to adjust. */
13922 if (dyn
.d_un
.d_val
!= 0)
13924 struct elf_link_hash_entry
* eh
;
13926 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
13927 FALSE
, FALSE
, TRUE
);
13928 if (eh
!= NULL
&& eh
->target_internal
== ST_BRANCH_TO_THUMB
)
13930 dyn
.d_un
.d_val
|= 1;
13931 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
13938 /* Fill in the first entry in the procedure linkage table. */
13939 if (splt
->size
> 0 && htab
->plt_header_size
)
13941 const bfd_vma
*plt0_entry
;
13942 bfd_vma got_address
, plt_address
, got_displacement
;
13944 /* Calculate the addresses of the GOT and PLT. */
13945 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
13946 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
13948 if (htab
->vxworks_p
)
13950 /* The VxWorks GOT is relocated by the dynamic linker.
13951 Therefore, we must emit relocations rather than simply
13952 computing the values now. */
13953 Elf_Internal_Rela rel
;
13955 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
13956 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
13957 splt
->contents
+ 0);
13958 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
13959 splt
->contents
+ 4);
13960 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
13961 splt
->contents
+ 8);
13962 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
13964 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
13965 rel
.r_offset
= plt_address
+ 12;
13966 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
13968 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
13969 htab
->srelplt2
->contents
);
13973 got_displacement
= got_address
- (plt_address
+ 16);
13975 plt0_entry
= elf32_arm_plt0_entry
;
13976 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
13977 splt
->contents
+ 0);
13978 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
13979 splt
->contents
+ 4);
13980 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
13981 splt
->contents
+ 8);
13982 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
13983 splt
->contents
+ 12);
13985 #ifdef FOUR_WORD_PLT
13986 /* The displacement value goes in the otherwise-unused
13987 last word of the second entry. */
13988 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
13990 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
13995 /* UnixWare sets the entsize of .plt to 4, although that doesn't
13996 really seem like the right value. */
13997 if (splt
->output_section
->owner
== output_bfd
)
13998 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
14000 if (htab
->dt_tlsdesc_plt
)
14002 bfd_vma got_address
14003 = sgot
->output_section
->vma
+ sgot
->output_offset
;
14004 bfd_vma gotplt_address
= (htab
->root
.sgot
->output_section
->vma
14005 + htab
->root
.sgot
->output_offset
);
14006 bfd_vma plt_address
14007 = splt
->output_section
->vma
+ splt
->output_offset
;
14009 arm_put_trampoline (htab
, output_bfd
,
14010 splt
->contents
+ htab
->dt_tlsdesc_plt
,
14011 dl_tlsdesc_lazy_trampoline
, 6);
14013 bfd_put_32 (output_bfd
,
14014 gotplt_address
+ htab
->dt_tlsdesc_got
14015 - (plt_address
+ htab
->dt_tlsdesc_plt
)
14016 - dl_tlsdesc_lazy_trampoline
[6],
14017 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24);
14018 bfd_put_32 (output_bfd
,
14019 got_address
- (plt_address
+ htab
->dt_tlsdesc_plt
)
14020 - dl_tlsdesc_lazy_trampoline
[7],
14021 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24 + 4);
14024 if (htab
->tls_trampoline
)
14026 arm_put_trampoline (htab
, output_bfd
,
14027 splt
->contents
+ htab
->tls_trampoline
,
14028 tls_trampoline
, 3);
14029 #ifdef FOUR_WORD_PLT
14030 bfd_put_32 (output_bfd
, 0x00000000,
14031 splt
->contents
+ htab
->tls_trampoline
+ 12);
14035 if (htab
->vxworks_p
&& !info
->shared
&& htab
->root
.splt
->size
> 0)
14037 /* Correct the .rel(a).plt.unloaded relocations. They will have
14038 incorrect symbol indexes. */
14042 num_plts
= ((htab
->root
.splt
->size
- htab
->plt_header_size
)
14043 / htab
->plt_entry_size
);
14044 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
14046 for (; num_plts
; num_plts
--)
14048 Elf_Internal_Rela rel
;
14050 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
14051 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
14052 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
14053 p
+= RELOC_SIZE (htab
);
14055 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
14056 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
14057 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
14058 p
+= RELOC_SIZE (htab
);
14063 /* Fill in the first three entries in the global offset table. */
14066 if (sgot
->size
> 0)
14069 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
14071 bfd_put_32 (output_bfd
,
14072 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
14074 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
14075 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
14078 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
14085 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
14087 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
14088 struct elf32_arm_link_hash_table
*globals
;
14090 i_ehdrp
= elf_elfheader (abfd
);
14092 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
14093 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
14095 i_ehdrp
->e_ident
[EI_OSABI
] = 0;
14096 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
14100 globals
= elf32_arm_hash_table (link_info
);
14101 if (globals
!= NULL
&& globals
->byteswap_code
)
14102 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
14106 static enum elf_reloc_type_class
14107 elf32_arm_reloc_type_class (const Elf_Internal_Rela
*rela
)
14109 switch ((int) ELF32_R_TYPE (rela
->r_info
))
14111 case R_ARM_RELATIVE
:
14112 return reloc_class_relative
;
14113 case R_ARM_JUMP_SLOT
:
14114 return reloc_class_plt
;
14116 return reloc_class_copy
;
14118 return reloc_class_normal
;
14123 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
14125 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
14128 /* Return TRUE if this is an unwinding table entry. */
14131 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
14133 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
14134 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
14138 /* Set the type and flags for an ARM section. We do this by
14139 the section name, which is a hack, but ought to work. */
14142 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
14146 name
= bfd_get_section_name (abfd
, sec
);
14148 if (is_arm_elf_unwind_section_name (abfd
, name
))
14150 hdr
->sh_type
= SHT_ARM_EXIDX
;
14151 hdr
->sh_flags
|= SHF_LINK_ORDER
;
14156 /* Handle an ARM specific section when reading an object file. This is
14157 called when bfd_section_from_shdr finds a section with an unknown
14161 elf32_arm_section_from_shdr (bfd
*abfd
,
14162 Elf_Internal_Shdr
* hdr
,
14166 /* There ought to be a place to keep ELF backend specific flags, but
14167 at the moment there isn't one. We just keep track of the
14168 sections by their name, instead. Fortunately, the ABI gives
14169 names for all the ARM specific sections, so we will probably get
14171 switch (hdr
->sh_type
)
14173 case SHT_ARM_EXIDX
:
14174 case SHT_ARM_PREEMPTMAP
:
14175 case SHT_ARM_ATTRIBUTES
:
14182 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
14188 static _arm_elf_section_data
*
14189 get_arm_elf_section_data (asection
* sec
)
14191 if (sec
&& sec
->owner
&& is_arm_elf (sec
->owner
))
14192 return elf32_arm_section_data (sec
);
14200 struct bfd_link_info
*info
;
14203 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
14204 asection
*, struct elf_link_hash_entry
*);
14205 } output_arch_syminfo
;
14207 enum map_symbol_type
14215 /* Output a single mapping symbol. */
14218 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
14219 enum map_symbol_type type
,
14222 static const char *names
[3] = {"$a", "$t", "$d"};
14223 Elf_Internal_Sym sym
;
14225 sym
.st_value
= osi
->sec
->output_section
->vma
14226 + osi
->sec
->output_offset
14230 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
14231 sym
.st_shndx
= osi
->sec_shndx
;
14232 sym
.st_target_internal
= 0;
14233 elf32_arm_section_map_add (osi
->sec
, names
[type
][1], offset
);
14234 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
14237 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
14238 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
14241 elf32_arm_output_plt_map_1 (output_arch_syminfo
*osi
,
14242 bfd_boolean is_iplt_entry_p
,
14243 union gotplt_union
*root_plt
,
14244 struct arm_plt_info
*arm_plt
)
14246 struct elf32_arm_link_hash_table
*htab
;
14247 bfd_vma addr
, plt_header_size
;
14249 if (root_plt
->offset
== (bfd_vma
) -1)
14252 htab
= elf32_arm_hash_table (osi
->info
);
14256 if (is_iplt_entry_p
)
14258 osi
->sec
= htab
->root
.iplt
;
14259 plt_header_size
= 0;
14263 osi
->sec
= htab
->root
.splt
;
14264 plt_header_size
= htab
->plt_header_size
;
14266 osi
->sec_shndx
= (_bfd_elf_section_from_bfd_section
14267 (osi
->info
->output_bfd
, osi
->sec
->output_section
));
14269 addr
= root_plt
->offset
& -2;
14270 if (htab
->symbian_p
)
14272 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14274 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
14277 else if (htab
->vxworks_p
)
14279 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14281 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
14283 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
14285 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
14290 bfd_boolean thumb_stub_p
;
14292 thumb_stub_p
= elf32_arm_plt_needs_thumb_stub_p (osi
->info
, arm_plt
);
14295 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
14298 #ifdef FOUR_WORD_PLT
14299 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14301 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
14304 /* A three-word PLT with no Thumb thunk contains only Arm code,
14305 so only need to output a mapping symbol for the first PLT entry and
14306 entries with thumb thunks. */
14307 if (thumb_stub_p
|| addr
== plt_header_size
)
14309 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14318 /* Output mapping symbols for PLT entries associated with H. */
14321 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
14323 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
14324 struct elf32_arm_link_hash_entry
*eh
;
14326 if (h
->root
.type
== bfd_link_hash_indirect
)
14329 if (h
->root
.type
== bfd_link_hash_warning
)
14330 /* When warning symbols are created, they **replace** the "real"
14331 entry in the hash table, thus we never get to see the real
14332 symbol in a hash traversal. So look at it now. */
14333 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14335 eh
= (struct elf32_arm_link_hash_entry
*) h
;
14336 return elf32_arm_output_plt_map_1 (osi
, SYMBOL_CALLS_LOCAL (osi
->info
, h
),
14337 &h
->plt
, &eh
->plt
);
14340 /* Output a single local symbol for a generated stub. */
14343 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
14344 bfd_vma offset
, bfd_vma size
)
14346 Elf_Internal_Sym sym
;
14348 sym
.st_value
= osi
->sec
->output_section
->vma
14349 + osi
->sec
->output_offset
14351 sym
.st_size
= size
;
14353 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
14354 sym
.st_shndx
= osi
->sec_shndx
;
14355 sym
.st_target_internal
= 0;
14356 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
14360 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
14363 struct elf32_arm_stub_hash_entry
*stub_entry
;
14364 asection
*stub_sec
;
14367 output_arch_syminfo
*osi
;
14368 const insn_sequence
*template_sequence
;
14369 enum stub_insn_type prev_type
;
14372 enum map_symbol_type sym_type
;
14374 /* Massage our args to the form they really have. */
14375 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
14376 osi
= (output_arch_syminfo
*) in_arg
;
14378 stub_sec
= stub_entry
->stub_sec
;
14380 /* Ensure this stub is attached to the current section being
14382 if (stub_sec
!= osi
->sec
)
14385 addr
= (bfd_vma
) stub_entry
->stub_offset
;
14386 stub_name
= stub_entry
->output_name
;
14388 template_sequence
= stub_entry
->stub_template
;
14389 switch (template_sequence
[0].type
)
14392 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
, stub_entry
->stub_size
))
14397 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
14398 stub_entry
->stub_size
))
14406 prev_type
= DATA_TYPE
;
14408 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
14410 switch (template_sequence
[i
].type
)
14413 sym_type
= ARM_MAP_ARM
;
14418 sym_type
= ARM_MAP_THUMB
;
14422 sym_type
= ARM_MAP_DATA
;
14430 if (template_sequence
[i
].type
!= prev_type
)
14432 prev_type
= template_sequence
[i
].type
;
14433 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
14437 switch (template_sequence
[i
].type
)
14461 /* Output mapping symbols for linker generated sections,
14462 and for those data-only sections that do not have a
14466 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
14467 struct bfd_link_info
*info
,
14469 int (*func
) (void *, const char *,
14470 Elf_Internal_Sym
*,
14472 struct elf_link_hash_entry
*))
14474 output_arch_syminfo osi
;
14475 struct elf32_arm_link_hash_table
*htab
;
14477 bfd_size_type size
;
14480 htab
= elf32_arm_hash_table (info
);
14484 check_use_blx (htab
);
14490 /* Add a $d mapping symbol to data-only sections that
14491 don't have any mapping symbol. This may result in (harmless) redundant
14492 mapping symbols. */
14493 for (input_bfd
= info
->input_bfds
;
14495 input_bfd
= input_bfd
->link_next
)
14497 if ((input_bfd
->flags
& (BFD_LINKER_CREATED
| HAS_SYMS
)) == HAS_SYMS
)
14498 for (osi
.sec
= input_bfd
->sections
;
14500 osi
.sec
= osi
.sec
->next
)
14502 if (osi
.sec
->output_section
!= NULL
14503 && ((osi
.sec
->output_section
->flags
& (SEC_ALLOC
| SEC_CODE
))
14505 && (osi
.sec
->flags
& (SEC_HAS_CONTENTS
| SEC_LINKER_CREATED
))
14506 == SEC_HAS_CONTENTS
14507 && get_arm_elf_section_data (osi
.sec
) != NULL
14508 && get_arm_elf_section_data (osi
.sec
)->mapcount
== 0
14509 && osi
.sec
->size
> 0)
14511 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14512 (output_bfd
, osi
.sec
->output_section
);
14513 if (osi
.sec_shndx
!= (int)SHN_BAD
)
14514 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 0);
14519 /* ARM->Thumb glue. */
14520 if (htab
->arm_glue_size
> 0)
14522 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
14523 ARM2THUMB_GLUE_SECTION_NAME
);
14525 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14526 (output_bfd
, osi
.sec
->output_section
);
14527 if (info
->shared
|| htab
->root
.is_relocatable_executable
14528 || htab
->pic_veneer
)
14529 size
= ARM2THUMB_PIC_GLUE_SIZE
;
14530 else if (htab
->use_blx
)
14531 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
14533 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
14535 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
14537 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
14538 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
14542 /* Thumb->ARM glue. */
14543 if (htab
->thumb_glue_size
> 0)
14545 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
14546 THUMB2ARM_GLUE_SECTION_NAME
);
14548 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14549 (output_bfd
, osi
.sec
->output_section
);
14550 size
= THUMB2ARM_GLUE_SIZE
;
14552 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
14554 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
14555 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
14559 /* ARMv4 BX veneers. */
14560 if (htab
->bx_glue_size
> 0)
14562 osi
.sec
= bfd_get_section_by_name (htab
->bfd_of_glue_owner
,
14563 ARM_BX_GLUE_SECTION_NAME
);
14565 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14566 (output_bfd
, osi
.sec
->output_section
);
14568 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
14571 /* Long calls stubs. */
14572 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
14574 asection
* stub_sec
;
14576 for (stub_sec
= htab
->stub_bfd
->sections
;
14578 stub_sec
= stub_sec
->next
)
14580 /* Ignore non-stub sections. */
14581 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
14584 osi
.sec
= stub_sec
;
14586 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14587 (output_bfd
, osi
.sec
->output_section
);
14589 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
14593 /* Finally, output mapping symbols for the PLT. */
14594 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
14596 osi
.sec
= htab
->root
.splt
;
14597 osi
.sec_shndx
= (_bfd_elf_section_from_bfd_section
14598 (output_bfd
, osi
.sec
->output_section
));
14600 /* Output mapping symbols for the plt header. SymbianOS does not have a
14602 if (htab
->vxworks_p
)
14604 /* VxWorks shared libraries have no PLT header. */
14607 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
14609 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
14613 else if (!htab
->symbian_p
)
14615 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
14617 #ifndef FOUR_WORD_PLT
14618 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
14623 if ((htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
14624 || (htab
->root
.iplt
&& htab
->root
.iplt
->size
> 0))
14626 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, &osi
);
14627 for (input_bfd
= info
->input_bfds
;
14629 input_bfd
= input_bfd
->link_next
)
14631 struct arm_local_iplt_info
**local_iplt
;
14632 unsigned int i
, num_syms
;
14634 local_iplt
= elf32_arm_local_iplt (input_bfd
);
14635 if (local_iplt
!= NULL
)
14637 num_syms
= elf_symtab_hdr (input_bfd
).sh_info
;
14638 for (i
= 0; i
< num_syms
; i
++)
14639 if (local_iplt
[i
] != NULL
14640 && !elf32_arm_output_plt_map_1 (&osi
, TRUE
,
14641 &local_iplt
[i
]->root
,
14642 &local_iplt
[i
]->arm
))
14647 if (htab
->dt_tlsdesc_plt
!= 0)
14649 /* Mapping symbols for the lazy tls trampoline. */
14650 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->dt_tlsdesc_plt
))
14653 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
14654 htab
->dt_tlsdesc_plt
+ 24))
14657 if (htab
->tls_trampoline
!= 0)
14659 /* Mapping symbols for the tls trampoline. */
14660 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->tls_trampoline
))
14662 #ifdef FOUR_WORD_PLT
14663 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
14664 htab
->tls_trampoline
+ 12))
14672 /* Allocate target specific section data. */
14675 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
14677 if (!sec
->used_by_bfd
)
14679 _arm_elf_section_data
*sdata
;
14680 bfd_size_type amt
= sizeof (*sdata
);
14682 sdata
= (_arm_elf_section_data
*) bfd_zalloc (abfd
, amt
);
14685 sec
->used_by_bfd
= sdata
;
14688 return _bfd_elf_new_section_hook (abfd
, sec
);
14692 /* Used to order a list of mapping symbols by address. */
14695 elf32_arm_compare_mapping (const void * a
, const void * b
)
14697 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
14698 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
14700 if (amap
->vma
> bmap
->vma
)
14702 else if (amap
->vma
< bmap
->vma
)
14704 else if (amap
->type
> bmap
->type
)
14705 /* Ensure results do not depend on the host qsort for objects with
14706 multiple mapping symbols at the same address by sorting on type
14709 else if (amap
->type
< bmap
->type
)
14715 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
14717 static unsigned long
14718 offset_prel31 (unsigned long addr
, bfd_vma offset
)
14720 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
14723 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
14727 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
14729 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
14730 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
14732 /* High bit of first word is supposed to be zero. */
14733 if ((first_word
& 0x80000000ul
) == 0)
14734 first_word
= offset_prel31 (first_word
, offset
);
14736 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
14737 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
14738 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
14739 second_word
= offset_prel31 (second_word
, offset
);
14741 bfd_put_32 (output_bfd
, first_word
, to
);
14742 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
14745 /* Data for make_branch_to_a8_stub(). */
14747 struct a8_branch_to_stub_data
{
14748 asection
*writing_section
;
14749 bfd_byte
*contents
;
14753 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
14754 places for a particular section. */
14757 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
14760 struct elf32_arm_stub_hash_entry
*stub_entry
;
14761 struct a8_branch_to_stub_data
*data
;
14762 bfd_byte
*contents
;
14763 unsigned long branch_insn
;
14764 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
14765 bfd_signed_vma branch_offset
;
14767 unsigned int target
;
14769 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
14770 data
= (struct a8_branch_to_stub_data
*) in_arg
;
14772 if (stub_entry
->target_section
!= data
->writing_section
14773 || stub_entry
->stub_type
< arm_stub_a8_veneer_lwm
)
14776 contents
= data
->contents
;
14778 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
14779 + stub_entry
->target_section
->output_offset
14780 + stub_entry
->target_value
;
14782 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
14783 + stub_entry
->stub_sec
->output_offset
14784 + stub_entry
->stub_offset
;
14786 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
14787 veneered_insn_loc
&= ~3u;
14789 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
14791 abfd
= stub_entry
->target_section
->owner
;
14792 target
= stub_entry
->target_value
;
14794 /* We attempt to avoid this condition by setting stubs_always_after_branch
14795 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
14796 This check is just to be on the safe side... */
14797 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
14799 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub is "
14800 "allocated in unsafe location"), abfd
);
14804 switch (stub_entry
->stub_type
)
14806 case arm_stub_a8_veneer_b
:
14807 case arm_stub_a8_veneer_b_cond
:
14808 branch_insn
= 0xf0009000;
14811 case arm_stub_a8_veneer_blx
:
14812 branch_insn
= 0xf000e800;
14815 case arm_stub_a8_veneer_bl
:
14817 unsigned int i1
, j1
, i2
, j2
, s
;
14819 branch_insn
= 0xf000d000;
14822 if (branch_offset
< -16777216 || branch_offset
> 16777214)
14824 /* There's not much we can do apart from complain if this
14826 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub out "
14827 "of range (input file too large)"), abfd
);
14831 /* i1 = not(j1 eor s), so:
14833 j1 = (not i1) eor s. */
14835 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
14836 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
14837 i2
= (branch_offset
>> 22) & 1;
14838 i1
= (branch_offset
>> 23) & 1;
14839 s
= (branch_offset
>> 24) & 1;
14842 branch_insn
|= j2
<< 11;
14843 branch_insn
|= j1
<< 13;
14844 branch_insn
|= s
<< 26;
14853 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[target
]);
14854 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[target
+ 2]);
14859 /* Do code byteswapping. Return FALSE afterwards so that the section is
14860 written out as normal. */
14863 elf32_arm_write_section (bfd
*output_bfd
,
14864 struct bfd_link_info
*link_info
,
14866 bfd_byte
*contents
)
14868 unsigned int mapcount
, errcount
;
14869 _arm_elf_section_data
*arm_data
;
14870 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
14871 elf32_arm_section_map
*map
;
14872 elf32_vfp11_erratum_list
*errnode
;
14875 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
14879 if (globals
== NULL
)
14882 /* If this section has not been allocated an _arm_elf_section_data
14883 structure then we cannot record anything. */
14884 arm_data
= get_arm_elf_section_data (sec
);
14885 if (arm_data
== NULL
)
14888 mapcount
= arm_data
->mapcount
;
14889 map
= arm_data
->map
;
14890 errcount
= arm_data
->erratumcount
;
14894 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
14896 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
14897 errnode
= errnode
->next
)
14899 bfd_vma target
= errnode
->vma
- offset
;
14901 switch (errnode
->type
)
14903 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
14905 bfd_vma branch_to_veneer
;
14906 /* Original condition code of instruction, plus bit mask for
14907 ARM B instruction. */
14908 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
14911 /* The instruction is before the label. */
14914 /* Above offset included in -4 below. */
14915 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
14916 - errnode
->vma
- 4;
14918 if ((signed) branch_to_veneer
< -(1 << 25)
14919 || (signed) branch_to_veneer
>= (1 << 25))
14920 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
14921 "range"), output_bfd
);
14923 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
14924 contents
[endianflip
^ target
] = insn
& 0xff;
14925 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
14926 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
14927 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
14931 case VFP11_ERRATUM_ARM_VENEER
:
14933 bfd_vma branch_from_veneer
;
14936 /* Take size of veneer into account. */
14937 branch_from_veneer
= errnode
->u
.v
.branch
->vma
14938 - errnode
->vma
- 12;
14940 if ((signed) branch_from_veneer
< -(1 << 25)
14941 || (signed) branch_from_veneer
>= (1 << 25))
14942 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
14943 "range"), output_bfd
);
14945 /* Original instruction. */
14946 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
14947 contents
[endianflip
^ target
] = insn
& 0xff;
14948 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
14949 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
14950 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
14952 /* Branch back to insn after original insn. */
14953 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
14954 contents
[endianflip
^ (target
+ 4)] = insn
& 0xff;
14955 contents
[endianflip
^ (target
+ 5)] = (insn
>> 8) & 0xff;
14956 contents
[endianflip
^ (target
+ 6)] = (insn
>> 16) & 0xff;
14957 contents
[endianflip
^ (target
+ 7)] = (insn
>> 24) & 0xff;
14967 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
14969 arm_unwind_table_edit
*edit_node
14970 = arm_data
->u
.exidx
.unwind_edit_list
;
14971 /* Now, sec->size is the size of the section we will write. The original
14972 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
14973 markers) was sec->rawsize. (This isn't the case if we perform no
14974 edits, then rawsize will be zero and we should use size). */
14975 bfd_byte
*edited_contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
14976 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
14977 unsigned int in_index
, out_index
;
14978 bfd_vma add_to_offsets
= 0;
14980 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
14984 unsigned int edit_index
= edit_node
->index
;
14986 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
14988 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
14989 contents
+ in_index
* 8, add_to_offsets
);
14993 else if (in_index
== edit_index
14994 || (in_index
* 8 >= input_size
14995 && edit_index
== UINT_MAX
))
14997 switch (edit_node
->type
)
14999 case DELETE_EXIDX_ENTRY
:
15001 add_to_offsets
+= 8;
15004 case INSERT_EXIDX_CANTUNWIND_AT_END
:
15006 asection
*text_sec
= edit_node
->linked_section
;
15007 bfd_vma text_offset
= text_sec
->output_section
->vma
15008 + text_sec
->output_offset
15010 bfd_vma exidx_offset
= offset
+ out_index
* 8;
15011 unsigned long prel31_offset
;
15013 /* Note: this is meant to be equivalent to an
15014 R_ARM_PREL31 relocation. These synthetic
15015 EXIDX_CANTUNWIND markers are not relocated by the
15016 usual BFD method. */
15017 prel31_offset
= (text_offset
- exidx_offset
)
15020 /* First address we can't unwind. */
15021 bfd_put_32 (output_bfd
, prel31_offset
,
15022 &edited_contents
[out_index
* 8]);
15024 /* Code for EXIDX_CANTUNWIND. */
15025 bfd_put_32 (output_bfd
, 0x1,
15026 &edited_contents
[out_index
* 8 + 4]);
15029 add_to_offsets
-= 8;
15034 edit_node
= edit_node
->next
;
15039 /* No more edits, copy remaining entries verbatim. */
15040 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
15041 contents
+ in_index
* 8, add_to_offsets
);
15047 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
15048 bfd_set_section_contents (output_bfd
, sec
->output_section
,
15050 (file_ptr
) sec
->output_offset
, sec
->size
);
15055 /* Fix code to point to Cortex-A8 erratum stubs. */
15056 if (globals
->fix_cortex_a8
)
15058 struct a8_branch_to_stub_data data
;
15060 data
.writing_section
= sec
;
15061 data
.contents
= contents
;
15063 bfd_hash_traverse (&globals
->stub_hash_table
, make_branch_to_a8_stub
,
15070 if (globals
->byteswap_code
)
15072 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
15075 for (i
= 0; i
< mapcount
; i
++)
15077 if (i
== mapcount
- 1)
15080 end
= map
[i
+ 1].vma
;
15082 switch (map
[i
].type
)
15085 /* Byte swap code words. */
15086 while (ptr
+ 3 < end
)
15088 tmp
= contents
[ptr
];
15089 contents
[ptr
] = contents
[ptr
+ 3];
15090 contents
[ptr
+ 3] = tmp
;
15091 tmp
= contents
[ptr
+ 1];
15092 contents
[ptr
+ 1] = contents
[ptr
+ 2];
15093 contents
[ptr
+ 2] = tmp
;
15099 /* Byte swap code halfwords. */
15100 while (ptr
+ 1 < end
)
15102 tmp
= contents
[ptr
];
15103 contents
[ptr
] = contents
[ptr
+ 1];
15104 contents
[ptr
+ 1] = tmp
;
15110 /* Leave data alone. */
15118 arm_data
->mapcount
= -1;
15119 arm_data
->mapsize
= 0;
15120 arm_data
->map
= NULL
;
15125 /* Mangle thumb function symbols as we read them in. */
15128 elf32_arm_swap_symbol_in (bfd
* abfd
,
15131 Elf_Internal_Sym
*dst
)
15133 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
15136 /* New EABI objects mark thumb function symbols by setting the low bit of
15138 if (ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
15139 || ELF_ST_TYPE (dst
->st_info
) == STT_GNU_IFUNC
)
15141 if (dst
->st_value
& 1)
15143 dst
->st_value
&= ~(bfd_vma
) 1;
15144 dst
->st_target_internal
= ST_BRANCH_TO_THUMB
;
15147 dst
->st_target_internal
= ST_BRANCH_TO_ARM
;
15149 else if (ELF_ST_TYPE (dst
->st_info
) == STT_ARM_TFUNC
)
15151 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_FUNC
);
15152 dst
->st_target_internal
= ST_BRANCH_TO_THUMB
;
15154 else if (ELF_ST_TYPE (dst
->st_info
) == STT_SECTION
)
15155 dst
->st_target_internal
= ST_BRANCH_LONG
;
15157 dst
->st_target_internal
= ST_BRANCH_UNKNOWN
;
15163 /* Mangle thumb function symbols as we write them out. */
15166 elf32_arm_swap_symbol_out (bfd
*abfd
,
15167 const Elf_Internal_Sym
*src
,
15171 Elf_Internal_Sym newsym
;
15173 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
15174 of the address set, as per the new EABI. We do this unconditionally
15175 because objcopy does not set the elf header flags until after
15176 it writes out the symbol table. */
15177 if (src
->st_target_internal
== ST_BRANCH_TO_THUMB
)
15180 if (ELF_ST_TYPE (src
->st_info
) != STT_GNU_IFUNC
)
15181 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
15182 if (newsym
.st_shndx
!= SHN_UNDEF
)
15184 /* Do this only for defined symbols. At link type, the static
15185 linker will simulate the work of dynamic linker of resolving
15186 symbols and will carry over the thumbness of found symbols to
15187 the output symbol table. It's not clear how it happens, but
15188 the thumbness of undefined symbols can well be different at
15189 runtime, and writing '1' for them will be confusing for users
15190 and possibly for dynamic linker itself.
15192 newsym
.st_value
|= 1;
15197 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
15200 /* Add the PT_ARM_EXIDX program header. */
15203 elf32_arm_modify_segment_map (bfd
*abfd
,
15204 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
15206 struct elf_segment_map
*m
;
15209 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
15210 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
15212 /* If there is already a PT_ARM_EXIDX header, then we do not
15213 want to add another one. This situation arises when running
15214 "strip"; the input binary already has the header. */
15215 m
= elf_tdata (abfd
)->segment_map
;
15216 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
15220 m
= (struct elf_segment_map
*)
15221 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
15224 m
->p_type
= PT_ARM_EXIDX
;
15226 m
->sections
[0] = sec
;
15228 m
->next
= elf_tdata (abfd
)->segment_map
;
15229 elf_tdata (abfd
)->segment_map
= m
;
15236 /* We may add a PT_ARM_EXIDX program header. */
15239 elf32_arm_additional_program_headers (bfd
*abfd
,
15240 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
15244 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
15245 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
15251 /* Hook called by the linker routine which adds symbols from an object
15255 elf32_arm_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
15256 Elf_Internal_Sym
*sym
, const char **namep
,
15257 flagword
*flagsp
, asection
**secp
, bfd_vma
*valp
)
15259 if ((abfd
->flags
& DYNAMIC
) == 0
15260 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
15261 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
15262 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
15264 if (elf32_arm_hash_table (info
)->vxworks_p
15265 && !elf_vxworks_add_symbol_hook (abfd
, info
, sym
, namep
,
15266 flagsp
, secp
, valp
))
15272 /* We use this to override swap_symbol_in and swap_symbol_out. */
15273 const struct elf_size_info elf32_arm_size_info
=
15275 sizeof (Elf32_External_Ehdr
),
15276 sizeof (Elf32_External_Phdr
),
15277 sizeof (Elf32_External_Shdr
),
15278 sizeof (Elf32_External_Rel
),
15279 sizeof (Elf32_External_Rela
),
15280 sizeof (Elf32_External_Sym
),
15281 sizeof (Elf32_External_Dyn
),
15282 sizeof (Elf_External_Note
),
15286 ELFCLASS32
, EV_CURRENT
,
15287 bfd_elf32_write_out_phdrs
,
15288 bfd_elf32_write_shdrs_and_ehdr
,
15289 bfd_elf32_checksum_contents
,
15290 bfd_elf32_write_relocs
,
15291 elf32_arm_swap_symbol_in
,
15292 elf32_arm_swap_symbol_out
,
15293 bfd_elf32_slurp_reloc_table
,
15294 bfd_elf32_slurp_symbol_table
,
15295 bfd_elf32_swap_dyn_in
,
15296 bfd_elf32_swap_dyn_out
,
15297 bfd_elf32_swap_reloc_in
,
15298 bfd_elf32_swap_reloc_out
,
15299 bfd_elf32_swap_reloca_in
,
15300 bfd_elf32_swap_reloca_out
15303 #define ELF_ARCH bfd_arch_arm
15304 #define ELF_TARGET_ID ARM_ELF_DATA
15305 #define ELF_MACHINE_CODE EM_ARM
15306 #ifdef __QNXTARGET__
15307 #define ELF_MAXPAGESIZE 0x1000
15309 #define ELF_MAXPAGESIZE 0x8000
15311 #define ELF_MINPAGESIZE 0x1000
15312 #define ELF_COMMONPAGESIZE 0x1000
15314 #define bfd_elf32_mkobject elf32_arm_mkobject
15316 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
15317 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
15318 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
15319 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
15320 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
15321 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
15322 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
15323 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
15324 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
15325 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
15326 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
15327 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
15328 #define bfd_elf32_bfd_final_link elf32_arm_final_link
15330 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
15331 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
15332 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
15333 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
15334 #define elf_backend_check_relocs elf32_arm_check_relocs
15335 #define elf_backend_relocate_section elf32_arm_relocate_section
15336 #define elf_backend_write_section elf32_arm_write_section
15337 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
15338 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
15339 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
15340 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
15341 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
15342 #define elf_backend_always_size_sections elf32_arm_always_size_sections
15343 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
15344 #define elf_backend_post_process_headers elf32_arm_post_process_headers
15345 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
15346 #define elf_backend_object_p elf32_arm_object_p
15347 #define elf_backend_fake_sections elf32_arm_fake_sections
15348 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
15349 #define elf_backend_final_write_processing elf32_arm_final_write_processing
15350 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
15351 #define elf_backend_size_info elf32_arm_size_info
15352 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
15353 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
15354 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
15355 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
15356 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
15358 #define elf_backend_can_refcount 1
15359 #define elf_backend_can_gc_sections 1
15360 #define elf_backend_plt_readonly 1
15361 #define elf_backend_want_got_plt 1
15362 #define elf_backend_want_plt_sym 0
15363 #define elf_backend_may_use_rel_p 1
15364 #define elf_backend_may_use_rela_p 0
15365 #define elf_backend_default_use_rela_p 0
15367 #define elf_backend_got_header_size 12
15369 #undef elf_backend_obj_attrs_vendor
15370 #define elf_backend_obj_attrs_vendor "aeabi"
15371 #undef elf_backend_obj_attrs_section
15372 #define elf_backend_obj_attrs_section ".ARM.attributes"
15373 #undef elf_backend_obj_attrs_arg_type
15374 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
15375 #undef elf_backend_obj_attrs_section_type
15376 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
15377 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
15378 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
15380 #include "elf32-target.h"
15382 /* VxWorks Targets. */
15384 #undef TARGET_LITTLE_SYM
15385 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
15386 #undef TARGET_LITTLE_NAME
15387 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
15388 #undef TARGET_BIG_SYM
15389 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
15390 #undef TARGET_BIG_NAME
15391 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
15393 /* Like elf32_arm_link_hash_table_create -- but overrides
15394 appropriately for VxWorks. */
15396 static struct bfd_link_hash_table
*
15397 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
15399 struct bfd_link_hash_table
*ret
;
15401 ret
= elf32_arm_link_hash_table_create (abfd
);
15404 struct elf32_arm_link_hash_table
*htab
15405 = (struct elf32_arm_link_hash_table
*) ret
;
15407 htab
->vxworks_p
= 1;
15413 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
15415 elf32_arm_final_write_processing (abfd
, linker
);
15416 elf_vxworks_final_write_processing (abfd
, linker
);
15420 #define elf32_bed elf32_arm_vxworks_bed
15422 #undef bfd_elf32_bfd_link_hash_table_create
15423 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
15424 #undef elf_backend_final_write_processing
15425 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
15426 #undef elf_backend_emit_relocs
15427 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
15429 #undef elf_backend_may_use_rel_p
15430 #define elf_backend_may_use_rel_p 0
15431 #undef elf_backend_may_use_rela_p
15432 #define elf_backend_may_use_rela_p 1
15433 #undef elf_backend_default_use_rela_p
15434 #define elf_backend_default_use_rela_p 1
15435 #undef elf_backend_want_plt_sym
15436 #define elf_backend_want_plt_sym 1
15437 #undef ELF_MAXPAGESIZE
15438 #define ELF_MAXPAGESIZE 0x1000
15440 #include "elf32-target.h"
15443 /* Merge backend specific data from an object file to the output
15444 object file when linking. */
15447 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
15449 flagword out_flags
;
15451 bfd_boolean flags_compatible
= TRUE
;
15454 /* Check if we have the same endianness. */
15455 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
15458 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
15461 if (!elf32_arm_merge_eabi_attributes (ibfd
, obfd
))
15464 /* The input BFD must have had its flags initialised. */
15465 /* The following seems bogus to me -- The flags are initialized in
15466 the assembler but I don't think an elf_flags_init field is
15467 written into the object. */
15468 /* BFD_ASSERT (elf_flags_init (ibfd)); */
15470 in_flags
= elf_elfheader (ibfd
)->e_flags
;
15471 out_flags
= elf_elfheader (obfd
)->e_flags
;
15473 /* In theory there is no reason why we couldn't handle this. However
15474 in practice it isn't even close to working and there is no real
15475 reason to want it. */
15476 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
15477 && !(ibfd
->flags
& DYNAMIC
)
15478 && (in_flags
& EF_ARM_BE8
))
15480 _bfd_error_handler (_("error: %B is already in final BE8 format"),
15485 if (!elf_flags_init (obfd
))
15487 /* If the input is the default architecture and had the default
15488 flags then do not bother setting the flags for the output
15489 architecture, instead allow future merges to do this. If no
15490 future merges ever set these flags then they will retain their
15491 uninitialised values, which surprise surprise, correspond
15492 to the default values. */
15493 if (bfd_get_arch_info (ibfd
)->the_default
15494 && elf_elfheader (ibfd
)->e_flags
== 0)
15497 elf_flags_init (obfd
) = TRUE
;
15498 elf_elfheader (obfd
)->e_flags
= in_flags
;
15500 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
15501 && bfd_get_arch_info (obfd
)->the_default
)
15502 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
15507 /* Determine what should happen if the input ARM architecture
15508 does not match the output ARM architecture. */
15509 if (! bfd_arm_merge_machines (ibfd
, obfd
))
15512 /* Identical flags must be compatible. */
15513 if (in_flags
== out_flags
)
15516 /* Check to see if the input BFD actually contains any sections. If
15517 not, its flags may not have been initialised either, but it
15518 cannot actually cause any incompatiblity. Do not short-circuit
15519 dynamic objects; their section list may be emptied by
15520 elf_link_add_object_symbols.
15522 Also check to see if there are no code sections in the input.
15523 In this case there is no need to check for code specific flags.
15524 XXX - do we need to worry about floating-point format compatability
15525 in data sections ? */
15526 if (!(ibfd
->flags
& DYNAMIC
))
15528 bfd_boolean null_input_bfd
= TRUE
;
15529 bfd_boolean only_data_sections
= TRUE
;
15531 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
15533 /* Ignore synthetic glue sections. */
15534 if (strcmp (sec
->name
, ".glue_7")
15535 && strcmp (sec
->name
, ".glue_7t"))
15537 if ((bfd_get_section_flags (ibfd
, sec
)
15538 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
15539 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
15540 only_data_sections
= FALSE
;
15542 null_input_bfd
= FALSE
;
15547 if (null_input_bfd
|| only_data_sections
)
15551 /* Complain about various flag mismatches. */
15552 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
15553 EF_ARM_EABI_VERSION (out_flags
)))
15556 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
15558 (in_flags
& EF_ARM_EABIMASK
) >> 24,
15559 (out_flags
& EF_ARM_EABIMASK
) >> 24);
15563 /* Not sure what needs to be checked for EABI versions >= 1. */
15564 /* VxWorks libraries do not use these flags. */
15565 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
15566 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
15567 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
15569 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
15572 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
15574 in_flags
& EF_ARM_APCS_26
? 26 : 32,
15575 out_flags
& EF_ARM_APCS_26
? 26 : 32);
15576 flags_compatible
= FALSE
;
15579 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
15581 if (in_flags
& EF_ARM_APCS_FLOAT
)
15583 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
15587 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
15590 flags_compatible
= FALSE
;
15593 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
15595 if (in_flags
& EF_ARM_VFP_FLOAT
)
15597 (_("error: %B uses VFP instructions, whereas %B does not"),
15601 (_("error: %B uses FPA instructions, whereas %B does not"),
15604 flags_compatible
= FALSE
;
15607 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
15609 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
15611 (_("error: %B uses Maverick instructions, whereas %B does not"),
15615 (_("error: %B does not use Maverick instructions, whereas %B does"),
15618 flags_compatible
= FALSE
;
15621 #ifdef EF_ARM_SOFT_FLOAT
15622 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
15624 /* We can allow interworking between code that is VFP format
15625 layout, and uses either soft float or integer regs for
15626 passing floating point arguments and results. We already
15627 know that the APCS_FLOAT flags match; similarly for VFP
15629 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
15630 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
15632 if (in_flags
& EF_ARM_SOFT_FLOAT
)
15634 (_("error: %B uses software FP, whereas %B uses hardware FP"),
15638 (_("error: %B uses hardware FP, whereas %B uses software FP"),
15641 flags_compatible
= FALSE
;
15646 /* Interworking mismatch is only a warning. */
15647 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
15649 if (in_flags
& EF_ARM_INTERWORK
)
15652 (_("Warning: %B supports interworking, whereas %B does not"),
15658 (_("Warning: %B does not support interworking, whereas %B does"),
15664 return flags_compatible
;
15668 /* Symbian OS Targets. */
15670 #undef TARGET_LITTLE_SYM
15671 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
15672 #undef TARGET_LITTLE_NAME
15673 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
15674 #undef TARGET_BIG_SYM
15675 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
15676 #undef TARGET_BIG_NAME
15677 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
15679 /* Like elf32_arm_link_hash_table_create -- but overrides
15680 appropriately for Symbian OS. */
15682 static struct bfd_link_hash_table
*
15683 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
15685 struct bfd_link_hash_table
*ret
;
15687 ret
= elf32_arm_link_hash_table_create (abfd
);
15690 struct elf32_arm_link_hash_table
*htab
15691 = (struct elf32_arm_link_hash_table
*)ret
;
15692 /* There is no PLT header for Symbian OS. */
15693 htab
->plt_header_size
= 0;
15694 /* The PLT entries are each one instruction and one word. */
15695 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
15696 htab
->symbian_p
= 1;
15697 /* Symbian uses armv5t or above, so use_blx is always true. */
15699 htab
->root
.is_relocatable_executable
= 1;
15704 static const struct bfd_elf_special_section
15705 elf32_arm_symbian_special_sections
[] =
15707 /* In a BPABI executable, the dynamic linking sections do not go in
15708 the loadable read-only segment. The post-linker may wish to
15709 refer to these sections, but they are not part of the final
15711 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
15712 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
15713 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
15714 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
15715 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
15716 /* These sections do not need to be writable as the SymbianOS
15717 postlinker will arrange things so that no dynamic relocation is
15719 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
15720 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
15721 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
15722 { NULL
, 0, 0, 0, 0 }
15726 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
15727 struct bfd_link_info
*link_info
)
15729 /* BPABI objects are never loaded directly by an OS kernel; they are
15730 processed by a postlinker first, into an OS-specific format. If
15731 the D_PAGED bit is set on the file, BFD will align segments on
15732 page boundaries, so that an OS can directly map the file. With
15733 BPABI objects, that just results in wasted space. In addition,
15734 because we clear the D_PAGED bit, map_sections_to_segments will
15735 recognize that the program headers should not be mapped into any
15736 loadable segment. */
15737 abfd
->flags
&= ~D_PAGED
;
15738 elf32_arm_begin_write_processing (abfd
, link_info
);
15742 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
15743 struct bfd_link_info
*info
)
15745 struct elf_segment_map
*m
;
15748 /* BPABI shared libraries and executables should have a PT_DYNAMIC
15749 segment. However, because the .dynamic section is not marked
15750 with SEC_LOAD, the generic ELF code will not create such a
15752 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
15755 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
15756 if (m
->p_type
== PT_DYNAMIC
)
15761 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
15762 m
->next
= elf_tdata (abfd
)->segment_map
;
15763 elf_tdata (abfd
)->segment_map
= m
;
15767 /* Also call the generic arm routine. */
15768 return elf32_arm_modify_segment_map (abfd
, info
);
15771 /* Return address for Ith PLT stub in section PLT, for relocation REL
15772 or (bfd_vma) -1 if it should not be included. */
15775 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
15776 const arelent
*rel ATTRIBUTE_UNUSED
)
15778 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
15783 #define elf32_bed elf32_arm_symbian_bed
15785 /* The dynamic sections are not allocated on SymbianOS; the postlinker
15786 will process them and then discard them. */
15787 #undef ELF_DYNAMIC_SEC_FLAGS
15788 #define ELF_DYNAMIC_SEC_FLAGS \
15789 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
15791 #undef elf_backend_emit_relocs
15793 #undef bfd_elf32_bfd_link_hash_table_create
15794 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
15795 #undef elf_backend_special_sections
15796 #define elf_backend_special_sections elf32_arm_symbian_special_sections
15797 #undef elf_backend_begin_write_processing
15798 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
15799 #undef elf_backend_final_write_processing
15800 #define elf_backend_final_write_processing elf32_arm_final_write_processing
15802 #undef elf_backend_modify_segment_map
15803 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
15805 /* There is no .got section for BPABI objects, and hence no header. */
15806 #undef elf_backend_got_header_size
15807 #define elf_backend_got_header_size 0
15809 /* Similarly, there is no .got.plt section. */
15810 #undef elf_backend_want_got_plt
15811 #define elf_backend_want_got_plt 0
15813 #undef elf_backend_plt_sym_val
15814 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
15816 #undef elf_backend_may_use_rel_p
15817 #define elf_backend_may_use_rel_p 1
15818 #undef elf_backend_may_use_rela_p
15819 #define elf_backend_may_use_rela_p 0
15820 #undef elf_backend_default_use_rela_p
15821 #define elf_backend_default_use_rela_p 0
15822 #undef elf_backend_want_plt_sym
15823 #define elf_backend_want_plt_sym 0
15824 #undef ELF_MAXPAGESIZE
15825 #define ELF_MAXPAGESIZE 0x8000
15827 #include "elf32-target.h"