1 /* 32-bit ELF support for ARM
2 Copyright 1998-2013 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
25 #include "bfd_stdint.h"
26 #include "libiberty.h"
30 #include "elf-vxworks.h"
33 /* Return the relocation section associated with NAME. HTAB is the
34 bfd's elf32_arm_link_hash_entry. */
35 #define RELOC_SECTION(HTAB, NAME) \
36 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
38 /* Return size of a relocation entry. HTAB is the bfd's
39 elf32_arm_link_hash_entry. */
40 #define RELOC_SIZE(HTAB) \
42 ? sizeof (Elf32_External_Rel) \
43 : sizeof (Elf32_External_Rela))
45 /* Return function to swap relocations in. HTAB is the bfd's
46 elf32_arm_link_hash_entry. */
47 #define SWAP_RELOC_IN(HTAB) \
49 ? bfd_elf32_swap_reloc_in \
50 : bfd_elf32_swap_reloca_in)
52 /* Return function to swap relocations out. HTAB is the bfd's
53 elf32_arm_link_hash_entry. */
54 #define SWAP_RELOC_OUT(HTAB) \
56 ? bfd_elf32_swap_reloc_out \
57 : bfd_elf32_swap_reloca_out)
59 #define elf_info_to_howto 0
60 #define elf_info_to_howto_rel elf32_arm_info_to_howto
62 #define ARM_ELF_ABI_VERSION 0
63 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
65 /* The Adjusted Place, as defined by AAELF. */
66 #define Pa(X) ((X) & 0xfffffffc)
68 static bfd_boolean
elf32_arm_write_section (bfd
*output_bfd
,
69 struct bfd_link_info
*link_info
,
73 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
74 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
77 static reloc_howto_type elf32_arm_howto_table_1
[] =
80 HOWTO (R_ARM_NONE
, /* type */
82 0, /* size (0 = byte, 1 = short, 2 = long) */
84 FALSE
, /* pc_relative */
86 complain_overflow_dont
,/* complain_on_overflow */
87 bfd_elf_generic_reloc
, /* special_function */
88 "R_ARM_NONE", /* name */
89 FALSE
, /* partial_inplace */
92 FALSE
), /* pcrel_offset */
94 HOWTO (R_ARM_PC24
, /* type */
96 2, /* size (0 = byte, 1 = short, 2 = long) */
98 TRUE
, /* pc_relative */
100 complain_overflow_signed
,/* complain_on_overflow */
101 bfd_elf_generic_reloc
, /* special_function */
102 "R_ARM_PC24", /* name */
103 FALSE
, /* partial_inplace */
104 0x00ffffff, /* src_mask */
105 0x00ffffff, /* dst_mask */
106 TRUE
), /* pcrel_offset */
108 /* 32 bit absolute */
109 HOWTO (R_ARM_ABS32
, /* type */
111 2, /* size (0 = byte, 1 = short, 2 = long) */
113 FALSE
, /* pc_relative */
115 complain_overflow_bitfield
,/* complain_on_overflow */
116 bfd_elf_generic_reloc
, /* special_function */
117 "R_ARM_ABS32", /* name */
118 FALSE
, /* partial_inplace */
119 0xffffffff, /* src_mask */
120 0xffffffff, /* dst_mask */
121 FALSE
), /* pcrel_offset */
123 /* standard 32bit pc-relative reloc */
124 HOWTO (R_ARM_REL32
, /* type */
126 2, /* size (0 = byte, 1 = short, 2 = long) */
128 TRUE
, /* pc_relative */
130 complain_overflow_bitfield
,/* complain_on_overflow */
131 bfd_elf_generic_reloc
, /* special_function */
132 "R_ARM_REL32", /* name */
133 FALSE
, /* partial_inplace */
134 0xffffffff, /* src_mask */
135 0xffffffff, /* dst_mask */
136 TRUE
), /* pcrel_offset */
138 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
139 HOWTO (R_ARM_LDR_PC_G0
, /* type */
141 0, /* size (0 = byte, 1 = short, 2 = long) */
143 TRUE
, /* pc_relative */
145 complain_overflow_dont
,/* complain_on_overflow */
146 bfd_elf_generic_reloc
, /* special_function */
147 "R_ARM_LDR_PC_G0", /* name */
148 FALSE
, /* partial_inplace */
149 0xffffffff, /* src_mask */
150 0xffffffff, /* dst_mask */
151 TRUE
), /* pcrel_offset */
153 /* 16 bit absolute */
154 HOWTO (R_ARM_ABS16
, /* type */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
158 FALSE
, /* pc_relative */
160 complain_overflow_bitfield
,/* complain_on_overflow */
161 bfd_elf_generic_reloc
, /* special_function */
162 "R_ARM_ABS16", /* name */
163 FALSE
, /* partial_inplace */
164 0x0000ffff, /* src_mask */
165 0x0000ffff, /* dst_mask */
166 FALSE
), /* pcrel_offset */
168 /* 12 bit absolute */
169 HOWTO (R_ARM_ABS12
, /* type */
171 2, /* size (0 = byte, 1 = short, 2 = long) */
173 FALSE
, /* pc_relative */
175 complain_overflow_bitfield
,/* complain_on_overflow */
176 bfd_elf_generic_reloc
, /* special_function */
177 "R_ARM_ABS12", /* name */
178 FALSE
, /* partial_inplace */
179 0x00000fff, /* src_mask */
180 0x00000fff, /* dst_mask */
181 FALSE
), /* pcrel_offset */
183 HOWTO (R_ARM_THM_ABS5
, /* type */
185 1, /* size (0 = byte, 1 = short, 2 = long) */
187 FALSE
, /* pc_relative */
189 complain_overflow_bitfield
,/* complain_on_overflow */
190 bfd_elf_generic_reloc
, /* special_function */
191 "R_ARM_THM_ABS5", /* name */
192 FALSE
, /* partial_inplace */
193 0x000007e0, /* src_mask */
194 0x000007e0, /* dst_mask */
195 FALSE
), /* pcrel_offset */
198 HOWTO (R_ARM_ABS8
, /* type */
200 0, /* size (0 = byte, 1 = short, 2 = long) */
202 FALSE
, /* pc_relative */
204 complain_overflow_bitfield
,/* complain_on_overflow */
205 bfd_elf_generic_reloc
, /* special_function */
206 "R_ARM_ABS8", /* name */
207 FALSE
, /* partial_inplace */
208 0x000000ff, /* src_mask */
209 0x000000ff, /* dst_mask */
210 FALSE
), /* pcrel_offset */
212 HOWTO (R_ARM_SBREL32
, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE
, /* pc_relative */
218 complain_overflow_dont
,/* complain_on_overflow */
219 bfd_elf_generic_reloc
, /* special_function */
220 "R_ARM_SBREL32", /* name */
221 FALSE
, /* partial_inplace */
222 0xffffffff, /* src_mask */
223 0xffffffff, /* dst_mask */
224 FALSE
), /* pcrel_offset */
226 HOWTO (R_ARM_THM_CALL
, /* type */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
230 TRUE
, /* pc_relative */
232 complain_overflow_signed
,/* complain_on_overflow */
233 bfd_elf_generic_reloc
, /* special_function */
234 "R_ARM_THM_CALL", /* name */
235 FALSE
, /* partial_inplace */
236 0x07ff2fff, /* src_mask */
237 0x07ff2fff, /* dst_mask */
238 TRUE
), /* pcrel_offset */
240 HOWTO (R_ARM_THM_PC8
, /* type */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
244 TRUE
, /* pc_relative */
246 complain_overflow_signed
,/* complain_on_overflow */
247 bfd_elf_generic_reloc
, /* special_function */
248 "R_ARM_THM_PC8", /* name */
249 FALSE
, /* partial_inplace */
250 0x000000ff, /* src_mask */
251 0x000000ff, /* dst_mask */
252 TRUE
), /* pcrel_offset */
254 HOWTO (R_ARM_BREL_ADJ
, /* type */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
258 FALSE
, /* pc_relative */
260 complain_overflow_signed
,/* complain_on_overflow */
261 bfd_elf_generic_reloc
, /* special_function */
262 "R_ARM_BREL_ADJ", /* name */
263 FALSE
, /* partial_inplace */
264 0xffffffff, /* src_mask */
265 0xffffffff, /* dst_mask */
266 FALSE
), /* pcrel_offset */
268 HOWTO (R_ARM_TLS_DESC
, /* type */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
272 FALSE
, /* pc_relative */
274 complain_overflow_bitfield
,/* complain_on_overflow */
275 bfd_elf_generic_reloc
, /* special_function */
276 "R_ARM_TLS_DESC", /* name */
277 FALSE
, /* partial_inplace */
278 0xffffffff, /* src_mask */
279 0xffffffff, /* dst_mask */
280 FALSE
), /* pcrel_offset */
282 HOWTO (R_ARM_THM_SWI8
, /* type */
284 0, /* size (0 = byte, 1 = short, 2 = long) */
286 FALSE
, /* pc_relative */
288 complain_overflow_signed
,/* complain_on_overflow */
289 bfd_elf_generic_reloc
, /* special_function */
290 "R_ARM_SWI8", /* name */
291 FALSE
, /* partial_inplace */
292 0x00000000, /* src_mask */
293 0x00000000, /* dst_mask */
294 FALSE
), /* pcrel_offset */
296 /* BLX instruction for the ARM. */
297 HOWTO (R_ARM_XPC25
, /* type */
299 2, /* size (0 = byte, 1 = short, 2 = long) */
301 TRUE
, /* pc_relative */
303 complain_overflow_signed
,/* complain_on_overflow */
304 bfd_elf_generic_reloc
, /* special_function */
305 "R_ARM_XPC25", /* name */
306 FALSE
, /* partial_inplace */
307 0x00ffffff, /* src_mask */
308 0x00ffffff, /* dst_mask */
309 TRUE
), /* pcrel_offset */
311 /* BLX instruction for the Thumb. */
312 HOWTO (R_ARM_THM_XPC22
, /* type */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
316 TRUE
, /* pc_relative */
318 complain_overflow_signed
,/* complain_on_overflow */
319 bfd_elf_generic_reloc
, /* special_function */
320 "R_ARM_THM_XPC22", /* name */
321 FALSE
, /* partial_inplace */
322 0x07ff2fff, /* src_mask */
323 0x07ff2fff, /* dst_mask */
324 TRUE
), /* pcrel_offset */
326 /* Dynamic TLS relocations. */
328 HOWTO (R_ARM_TLS_DTPMOD32
, /* type */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
332 FALSE
, /* pc_relative */
334 complain_overflow_bitfield
,/* complain_on_overflow */
335 bfd_elf_generic_reloc
, /* special_function */
336 "R_ARM_TLS_DTPMOD32", /* name */
337 TRUE
, /* partial_inplace */
338 0xffffffff, /* src_mask */
339 0xffffffff, /* dst_mask */
340 FALSE
), /* pcrel_offset */
342 HOWTO (R_ARM_TLS_DTPOFF32
, /* type */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
346 FALSE
, /* pc_relative */
348 complain_overflow_bitfield
,/* complain_on_overflow */
349 bfd_elf_generic_reloc
, /* special_function */
350 "R_ARM_TLS_DTPOFF32", /* name */
351 TRUE
, /* partial_inplace */
352 0xffffffff, /* src_mask */
353 0xffffffff, /* dst_mask */
354 FALSE
), /* pcrel_offset */
356 HOWTO (R_ARM_TLS_TPOFF32
, /* type */
358 2, /* size (0 = byte, 1 = short, 2 = long) */
360 FALSE
, /* pc_relative */
362 complain_overflow_bitfield
,/* complain_on_overflow */
363 bfd_elf_generic_reloc
, /* special_function */
364 "R_ARM_TLS_TPOFF32", /* name */
365 TRUE
, /* partial_inplace */
366 0xffffffff, /* src_mask */
367 0xffffffff, /* dst_mask */
368 FALSE
), /* pcrel_offset */
370 /* Relocs used in ARM Linux */
372 HOWTO (R_ARM_COPY
, /* type */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
376 FALSE
, /* pc_relative */
378 complain_overflow_bitfield
,/* complain_on_overflow */
379 bfd_elf_generic_reloc
, /* special_function */
380 "R_ARM_COPY", /* name */
381 TRUE
, /* partial_inplace */
382 0xffffffff, /* src_mask */
383 0xffffffff, /* dst_mask */
384 FALSE
), /* pcrel_offset */
386 HOWTO (R_ARM_GLOB_DAT
, /* type */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
390 FALSE
, /* pc_relative */
392 complain_overflow_bitfield
,/* complain_on_overflow */
393 bfd_elf_generic_reloc
, /* special_function */
394 "R_ARM_GLOB_DAT", /* name */
395 TRUE
, /* partial_inplace */
396 0xffffffff, /* src_mask */
397 0xffffffff, /* dst_mask */
398 FALSE
), /* pcrel_offset */
400 HOWTO (R_ARM_JUMP_SLOT
, /* type */
402 2, /* size (0 = byte, 1 = short, 2 = long) */
404 FALSE
, /* pc_relative */
406 complain_overflow_bitfield
,/* complain_on_overflow */
407 bfd_elf_generic_reloc
, /* special_function */
408 "R_ARM_JUMP_SLOT", /* name */
409 TRUE
, /* partial_inplace */
410 0xffffffff, /* src_mask */
411 0xffffffff, /* dst_mask */
412 FALSE
), /* pcrel_offset */
414 HOWTO (R_ARM_RELATIVE
, /* type */
416 2, /* size (0 = byte, 1 = short, 2 = long) */
418 FALSE
, /* pc_relative */
420 complain_overflow_bitfield
,/* complain_on_overflow */
421 bfd_elf_generic_reloc
, /* special_function */
422 "R_ARM_RELATIVE", /* name */
423 TRUE
, /* partial_inplace */
424 0xffffffff, /* src_mask */
425 0xffffffff, /* dst_mask */
426 FALSE
), /* pcrel_offset */
428 HOWTO (R_ARM_GOTOFF32
, /* type */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
432 FALSE
, /* pc_relative */
434 complain_overflow_bitfield
,/* complain_on_overflow */
435 bfd_elf_generic_reloc
, /* special_function */
436 "R_ARM_GOTOFF32", /* name */
437 TRUE
, /* partial_inplace */
438 0xffffffff, /* src_mask */
439 0xffffffff, /* dst_mask */
440 FALSE
), /* pcrel_offset */
442 HOWTO (R_ARM_GOTPC
, /* type */
444 2, /* size (0 = byte, 1 = short, 2 = long) */
446 TRUE
, /* pc_relative */
448 complain_overflow_bitfield
,/* complain_on_overflow */
449 bfd_elf_generic_reloc
, /* special_function */
450 "R_ARM_GOTPC", /* name */
451 TRUE
, /* partial_inplace */
452 0xffffffff, /* src_mask */
453 0xffffffff, /* dst_mask */
454 TRUE
), /* pcrel_offset */
456 HOWTO (R_ARM_GOT32
, /* type */
458 2, /* size (0 = byte, 1 = short, 2 = long) */
460 FALSE
, /* pc_relative */
462 complain_overflow_bitfield
,/* complain_on_overflow */
463 bfd_elf_generic_reloc
, /* special_function */
464 "R_ARM_GOT32", /* name */
465 TRUE
, /* partial_inplace */
466 0xffffffff, /* src_mask */
467 0xffffffff, /* dst_mask */
468 FALSE
), /* pcrel_offset */
470 HOWTO (R_ARM_PLT32
, /* type */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
474 TRUE
, /* pc_relative */
476 complain_overflow_bitfield
,/* complain_on_overflow */
477 bfd_elf_generic_reloc
, /* special_function */
478 "R_ARM_PLT32", /* name */
479 FALSE
, /* partial_inplace */
480 0x00ffffff, /* src_mask */
481 0x00ffffff, /* dst_mask */
482 TRUE
), /* pcrel_offset */
484 HOWTO (R_ARM_CALL
, /* type */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
488 TRUE
, /* pc_relative */
490 complain_overflow_signed
,/* complain_on_overflow */
491 bfd_elf_generic_reloc
, /* special_function */
492 "R_ARM_CALL", /* name */
493 FALSE
, /* partial_inplace */
494 0x00ffffff, /* src_mask */
495 0x00ffffff, /* dst_mask */
496 TRUE
), /* pcrel_offset */
498 HOWTO (R_ARM_JUMP24
, /* type */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
502 TRUE
, /* pc_relative */
504 complain_overflow_signed
,/* complain_on_overflow */
505 bfd_elf_generic_reloc
, /* special_function */
506 "R_ARM_JUMP24", /* name */
507 FALSE
, /* partial_inplace */
508 0x00ffffff, /* src_mask */
509 0x00ffffff, /* dst_mask */
510 TRUE
), /* pcrel_offset */
512 HOWTO (R_ARM_THM_JUMP24
, /* type */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
516 TRUE
, /* pc_relative */
518 complain_overflow_signed
,/* complain_on_overflow */
519 bfd_elf_generic_reloc
, /* special_function */
520 "R_ARM_THM_JUMP24", /* name */
521 FALSE
, /* partial_inplace */
522 0x07ff2fff, /* src_mask */
523 0x07ff2fff, /* dst_mask */
524 TRUE
), /* pcrel_offset */
526 HOWTO (R_ARM_BASE_ABS
, /* type */
528 2, /* size (0 = byte, 1 = short, 2 = long) */
530 FALSE
, /* pc_relative */
532 complain_overflow_dont
,/* complain_on_overflow */
533 bfd_elf_generic_reloc
, /* special_function */
534 "R_ARM_BASE_ABS", /* name */
535 FALSE
, /* partial_inplace */
536 0xffffffff, /* src_mask */
537 0xffffffff, /* dst_mask */
538 FALSE
), /* pcrel_offset */
540 HOWTO (R_ARM_ALU_PCREL7_0
, /* type */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
544 TRUE
, /* pc_relative */
546 complain_overflow_dont
,/* complain_on_overflow */
547 bfd_elf_generic_reloc
, /* special_function */
548 "R_ARM_ALU_PCREL_7_0", /* name */
549 FALSE
, /* partial_inplace */
550 0x00000fff, /* src_mask */
551 0x00000fff, /* dst_mask */
552 TRUE
), /* pcrel_offset */
554 HOWTO (R_ARM_ALU_PCREL15_8
, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 TRUE
, /* pc_relative */
560 complain_overflow_dont
,/* complain_on_overflow */
561 bfd_elf_generic_reloc
, /* special_function */
562 "R_ARM_ALU_PCREL_15_8",/* name */
563 FALSE
, /* partial_inplace */
564 0x00000fff, /* src_mask */
565 0x00000fff, /* dst_mask */
566 TRUE
), /* pcrel_offset */
568 HOWTO (R_ARM_ALU_PCREL23_15
, /* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 TRUE
, /* pc_relative */
574 complain_overflow_dont
,/* complain_on_overflow */
575 bfd_elf_generic_reloc
, /* special_function */
576 "R_ARM_ALU_PCREL_23_15",/* name */
577 FALSE
, /* partial_inplace */
578 0x00000fff, /* src_mask */
579 0x00000fff, /* dst_mask */
580 TRUE
), /* pcrel_offset */
582 HOWTO (R_ARM_LDR_SBREL_11_0
, /* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 FALSE
, /* pc_relative */
588 complain_overflow_dont
,/* complain_on_overflow */
589 bfd_elf_generic_reloc
, /* special_function */
590 "R_ARM_LDR_SBREL_11_0",/* name */
591 FALSE
, /* partial_inplace */
592 0x00000fff, /* src_mask */
593 0x00000fff, /* dst_mask */
594 FALSE
), /* pcrel_offset */
596 HOWTO (R_ARM_ALU_SBREL_19_12
, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE
, /* pc_relative */
602 complain_overflow_dont
,/* complain_on_overflow */
603 bfd_elf_generic_reloc
, /* special_function */
604 "R_ARM_ALU_SBREL_19_12",/* name */
605 FALSE
, /* partial_inplace */
606 0x000ff000, /* src_mask */
607 0x000ff000, /* dst_mask */
608 FALSE
), /* pcrel_offset */
610 HOWTO (R_ARM_ALU_SBREL_27_20
, /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 FALSE
, /* pc_relative */
616 complain_overflow_dont
,/* complain_on_overflow */
617 bfd_elf_generic_reloc
, /* special_function */
618 "R_ARM_ALU_SBREL_27_20",/* name */
619 FALSE
, /* partial_inplace */
620 0x0ff00000, /* src_mask */
621 0x0ff00000, /* dst_mask */
622 FALSE
), /* pcrel_offset */
624 HOWTO (R_ARM_TARGET1
, /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 FALSE
, /* pc_relative */
630 complain_overflow_dont
,/* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 "R_ARM_TARGET1", /* name */
633 FALSE
, /* partial_inplace */
634 0xffffffff, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE
), /* pcrel_offset */
638 HOWTO (R_ARM_ROSEGREL32
, /* type */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
642 FALSE
, /* pc_relative */
644 complain_overflow_dont
,/* complain_on_overflow */
645 bfd_elf_generic_reloc
, /* special_function */
646 "R_ARM_ROSEGREL32", /* name */
647 FALSE
, /* partial_inplace */
648 0xffffffff, /* src_mask */
649 0xffffffff, /* dst_mask */
650 FALSE
), /* pcrel_offset */
652 HOWTO (R_ARM_V4BX
, /* type */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
656 FALSE
, /* pc_relative */
658 complain_overflow_dont
,/* complain_on_overflow */
659 bfd_elf_generic_reloc
, /* special_function */
660 "R_ARM_V4BX", /* name */
661 FALSE
, /* partial_inplace */
662 0xffffffff, /* src_mask */
663 0xffffffff, /* dst_mask */
664 FALSE
), /* pcrel_offset */
666 HOWTO (R_ARM_TARGET2
, /* type */
668 2, /* size (0 = byte, 1 = short, 2 = long) */
670 FALSE
, /* pc_relative */
672 complain_overflow_signed
,/* complain_on_overflow */
673 bfd_elf_generic_reloc
, /* special_function */
674 "R_ARM_TARGET2", /* name */
675 FALSE
, /* partial_inplace */
676 0xffffffff, /* src_mask */
677 0xffffffff, /* dst_mask */
678 TRUE
), /* pcrel_offset */
680 HOWTO (R_ARM_PREL31
, /* type */
682 2, /* size (0 = byte, 1 = short, 2 = long) */
684 TRUE
, /* pc_relative */
686 complain_overflow_signed
,/* complain_on_overflow */
687 bfd_elf_generic_reloc
, /* special_function */
688 "R_ARM_PREL31", /* name */
689 FALSE
, /* partial_inplace */
690 0x7fffffff, /* src_mask */
691 0x7fffffff, /* dst_mask */
692 TRUE
), /* pcrel_offset */
694 HOWTO (R_ARM_MOVW_ABS_NC
, /* type */
696 2, /* size (0 = byte, 1 = short, 2 = long) */
698 FALSE
, /* pc_relative */
700 complain_overflow_dont
,/* complain_on_overflow */
701 bfd_elf_generic_reloc
, /* special_function */
702 "R_ARM_MOVW_ABS_NC", /* name */
703 FALSE
, /* partial_inplace */
704 0x000f0fff, /* src_mask */
705 0x000f0fff, /* dst_mask */
706 FALSE
), /* pcrel_offset */
708 HOWTO (R_ARM_MOVT_ABS
, /* type */
710 2, /* size (0 = byte, 1 = short, 2 = long) */
712 FALSE
, /* pc_relative */
714 complain_overflow_bitfield
,/* complain_on_overflow */
715 bfd_elf_generic_reloc
, /* special_function */
716 "R_ARM_MOVT_ABS", /* name */
717 FALSE
, /* partial_inplace */
718 0x000f0fff, /* src_mask */
719 0x000f0fff, /* dst_mask */
720 FALSE
), /* pcrel_offset */
722 HOWTO (R_ARM_MOVW_PREL_NC
, /* type */
724 2, /* size (0 = byte, 1 = short, 2 = long) */
726 TRUE
, /* pc_relative */
728 complain_overflow_dont
,/* complain_on_overflow */
729 bfd_elf_generic_reloc
, /* special_function */
730 "R_ARM_MOVW_PREL_NC", /* name */
731 FALSE
, /* partial_inplace */
732 0x000f0fff, /* src_mask */
733 0x000f0fff, /* dst_mask */
734 TRUE
), /* pcrel_offset */
736 HOWTO (R_ARM_MOVT_PREL
, /* type */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
740 TRUE
, /* pc_relative */
742 complain_overflow_bitfield
,/* complain_on_overflow */
743 bfd_elf_generic_reloc
, /* special_function */
744 "R_ARM_MOVT_PREL", /* name */
745 FALSE
, /* partial_inplace */
746 0x000f0fff, /* src_mask */
747 0x000f0fff, /* dst_mask */
748 TRUE
), /* pcrel_offset */
750 HOWTO (R_ARM_THM_MOVW_ABS_NC
, /* type */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
754 FALSE
, /* pc_relative */
756 complain_overflow_dont
,/* complain_on_overflow */
757 bfd_elf_generic_reloc
, /* special_function */
758 "R_ARM_THM_MOVW_ABS_NC",/* name */
759 FALSE
, /* partial_inplace */
760 0x040f70ff, /* src_mask */
761 0x040f70ff, /* dst_mask */
762 FALSE
), /* pcrel_offset */
764 HOWTO (R_ARM_THM_MOVT_ABS
, /* type */
766 2, /* size (0 = byte, 1 = short, 2 = long) */
768 FALSE
, /* pc_relative */
770 complain_overflow_bitfield
,/* complain_on_overflow */
771 bfd_elf_generic_reloc
, /* special_function */
772 "R_ARM_THM_MOVT_ABS", /* name */
773 FALSE
, /* partial_inplace */
774 0x040f70ff, /* src_mask */
775 0x040f70ff, /* dst_mask */
776 FALSE
), /* pcrel_offset */
778 HOWTO (R_ARM_THM_MOVW_PREL_NC
,/* type */
780 2, /* size (0 = byte, 1 = short, 2 = long) */
782 TRUE
, /* pc_relative */
784 complain_overflow_dont
,/* complain_on_overflow */
785 bfd_elf_generic_reloc
, /* special_function */
786 "R_ARM_THM_MOVW_PREL_NC",/* name */
787 FALSE
, /* partial_inplace */
788 0x040f70ff, /* src_mask */
789 0x040f70ff, /* dst_mask */
790 TRUE
), /* pcrel_offset */
792 HOWTO (R_ARM_THM_MOVT_PREL
, /* type */
794 2, /* size (0 = byte, 1 = short, 2 = long) */
796 TRUE
, /* pc_relative */
798 complain_overflow_bitfield
,/* complain_on_overflow */
799 bfd_elf_generic_reloc
, /* special_function */
800 "R_ARM_THM_MOVT_PREL", /* name */
801 FALSE
, /* partial_inplace */
802 0x040f70ff, /* src_mask */
803 0x040f70ff, /* dst_mask */
804 TRUE
), /* pcrel_offset */
806 HOWTO (R_ARM_THM_JUMP19
, /* type */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
810 TRUE
, /* pc_relative */
812 complain_overflow_signed
,/* complain_on_overflow */
813 bfd_elf_generic_reloc
, /* special_function */
814 "R_ARM_THM_JUMP19", /* name */
815 FALSE
, /* partial_inplace */
816 0x043f2fff, /* src_mask */
817 0x043f2fff, /* dst_mask */
818 TRUE
), /* pcrel_offset */
820 HOWTO (R_ARM_THM_JUMP6
, /* type */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
824 TRUE
, /* pc_relative */
826 complain_overflow_unsigned
,/* complain_on_overflow */
827 bfd_elf_generic_reloc
, /* special_function */
828 "R_ARM_THM_JUMP6", /* name */
829 FALSE
, /* partial_inplace */
830 0x02f8, /* src_mask */
831 0x02f8, /* dst_mask */
832 TRUE
), /* pcrel_offset */
834 /* These are declared as 13-bit signed relocations because we can
835 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
837 HOWTO (R_ARM_THM_ALU_PREL_11_0
,/* type */
839 2, /* size (0 = byte, 1 = short, 2 = long) */
841 TRUE
, /* pc_relative */
843 complain_overflow_dont
,/* complain_on_overflow */
844 bfd_elf_generic_reloc
, /* special_function */
845 "R_ARM_THM_ALU_PREL_11_0",/* name */
846 FALSE
, /* partial_inplace */
847 0xffffffff, /* src_mask */
848 0xffffffff, /* dst_mask */
849 TRUE
), /* pcrel_offset */
851 HOWTO (R_ARM_THM_PC12
, /* type */
853 2, /* size (0 = byte, 1 = short, 2 = long) */
855 TRUE
, /* pc_relative */
857 complain_overflow_dont
,/* complain_on_overflow */
858 bfd_elf_generic_reloc
, /* special_function */
859 "R_ARM_THM_PC12", /* name */
860 FALSE
, /* partial_inplace */
861 0xffffffff, /* src_mask */
862 0xffffffff, /* dst_mask */
863 TRUE
), /* pcrel_offset */
865 HOWTO (R_ARM_ABS32_NOI
, /* type */
867 2, /* size (0 = byte, 1 = short, 2 = long) */
869 FALSE
, /* pc_relative */
871 complain_overflow_dont
,/* complain_on_overflow */
872 bfd_elf_generic_reloc
, /* special_function */
873 "R_ARM_ABS32_NOI", /* name */
874 FALSE
, /* partial_inplace */
875 0xffffffff, /* src_mask */
876 0xffffffff, /* dst_mask */
877 FALSE
), /* pcrel_offset */
879 HOWTO (R_ARM_REL32_NOI
, /* type */
881 2, /* size (0 = byte, 1 = short, 2 = long) */
883 TRUE
, /* pc_relative */
885 complain_overflow_dont
,/* complain_on_overflow */
886 bfd_elf_generic_reloc
, /* special_function */
887 "R_ARM_REL32_NOI", /* name */
888 FALSE
, /* partial_inplace */
889 0xffffffff, /* src_mask */
890 0xffffffff, /* dst_mask */
891 FALSE
), /* pcrel_offset */
893 /* Group relocations. */
895 HOWTO (R_ARM_ALU_PC_G0_NC
, /* type */
897 2, /* size (0 = byte, 1 = short, 2 = long) */
899 TRUE
, /* pc_relative */
901 complain_overflow_dont
,/* complain_on_overflow */
902 bfd_elf_generic_reloc
, /* special_function */
903 "R_ARM_ALU_PC_G0_NC", /* name */
904 FALSE
, /* partial_inplace */
905 0xffffffff, /* src_mask */
906 0xffffffff, /* dst_mask */
907 TRUE
), /* pcrel_offset */
909 HOWTO (R_ARM_ALU_PC_G0
, /* type */
911 2, /* size (0 = byte, 1 = short, 2 = long) */
913 TRUE
, /* pc_relative */
915 complain_overflow_dont
,/* complain_on_overflow */
916 bfd_elf_generic_reloc
, /* special_function */
917 "R_ARM_ALU_PC_G0", /* name */
918 FALSE
, /* partial_inplace */
919 0xffffffff, /* src_mask */
920 0xffffffff, /* dst_mask */
921 TRUE
), /* pcrel_offset */
923 HOWTO (R_ARM_ALU_PC_G1_NC
, /* type */
925 2, /* size (0 = byte, 1 = short, 2 = long) */
927 TRUE
, /* pc_relative */
929 complain_overflow_dont
,/* complain_on_overflow */
930 bfd_elf_generic_reloc
, /* special_function */
931 "R_ARM_ALU_PC_G1_NC", /* name */
932 FALSE
, /* partial_inplace */
933 0xffffffff, /* src_mask */
934 0xffffffff, /* dst_mask */
935 TRUE
), /* pcrel_offset */
937 HOWTO (R_ARM_ALU_PC_G1
, /* type */
939 2, /* size (0 = byte, 1 = short, 2 = long) */
941 TRUE
, /* pc_relative */
943 complain_overflow_dont
,/* complain_on_overflow */
944 bfd_elf_generic_reloc
, /* special_function */
945 "R_ARM_ALU_PC_G1", /* name */
946 FALSE
, /* partial_inplace */
947 0xffffffff, /* src_mask */
948 0xffffffff, /* dst_mask */
949 TRUE
), /* pcrel_offset */
951 HOWTO (R_ARM_ALU_PC_G2
, /* type */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
955 TRUE
, /* pc_relative */
957 complain_overflow_dont
,/* complain_on_overflow */
958 bfd_elf_generic_reloc
, /* special_function */
959 "R_ARM_ALU_PC_G2", /* name */
960 FALSE
, /* partial_inplace */
961 0xffffffff, /* src_mask */
962 0xffffffff, /* dst_mask */
963 TRUE
), /* pcrel_offset */
965 HOWTO (R_ARM_LDR_PC_G1
, /* type */
967 2, /* size (0 = byte, 1 = short, 2 = long) */
969 TRUE
, /* pc_relative */
971 complain_overflow_dont
,/* complain_on_overflow */
972 bfd_elf_generic_reloc
, /* special_function */
973 "R_ARM_LDR_PC_G1", /* name */
974 FALSE
, /* partial_inplace */
975 0xffffffff, /* src_mask */
976 0xffffffff, /* dst_mask */
977 TRUE
), /* pcrel_offset */
979 HOWTO (R_ARM_LDR_PC_G2
, /* type */
981 2, /* size (0 = byte, 1 = short, 2 = long) */
983 TRUE
, /* pc_relative */
985 complain_overflow_dont
,/* complain_on_overflow */
986 bfd_elf_generic_reloc
, /* special_function */
987 "R_ARM_LDR_PC_G2", /* name */
988 FALSE
, /* partial_inplace */
989 0xffffffff, /* src_mask */
990 0xffffffff, /* dst_mask */
991 TRUE
), /* pcrel_offset */
993 HOWTO (R_ARM_LDRS_PC_G0
, /* type */
995 2, /* size (0 = byte, 1 = short, 2 = long) */
997 TRUE
, /* pc_relative */
999 complain_overflow_dont
,/* complain_on_overflow */
1000 bfd_elf_generic_reloc
, /* special_function */
1001 "R_ARM_LDRS_PC_G0", /* name */
1002 FALSE
, /* partial_inplace */
1003 0xffffffff, /* src_mask */
1004 0xffffffff, /* dst_mask */
1005 TRUE
), /* pcrel_offset */
1007 HOWTO (R_ARM_LDRS_PC_G1
, /* type */
1009 2, /* size (0 = byte, 1 = short, 2 = long) */
1011 TRUE
, /* pc_relative */
1013 complain_overflow_dont
,/* complain_on_overflow */
1014 bfd_elf_generic_reloc
, /* special_function */
1015 "R_ARM_LDRS_PC_G1", /* name */
1016 FALSE
, /* partial_inplace */
1017 0xffffffff, /* src_mask */
1018 0xffffffff, /* dst_mask */
1019 TRUE
), /* pcrel_offset */
1021 HOWTO (R_ARM_LDRS_PC_G2
, /* type */
1023 2, /* size (0 = byte, 1 = short, 2 = long) */
1025 TRUE
, /* pc_relative */
1027 complain_overflow_dont
,/* complain_on_overflow */
1028 bfd_elf_generic_reloc
, /* special_function */
1029 "R_ARM_LDRS_PC_G2", /* name */
1030 FALSE
, /* partial_inplace */
1031 0xffffffff, /* src_mask */
1032 0xffffffff, /* dst_mask */
1033 TRUE
), /* pcrel_offset */
1035 HOWTO (R_ARM_LDC_PC_G0
, /* type */
1037 2, /* size (0 = byte, 1 = short, 2 = long) */
1039 TRUE
, /* pc_relative */
1041 complain_overflow_dont
,/* complain_on_overflow */
1042 bfd_elf_generic_reloc
, /* special_function */
1043 "R_ARM_LDC_PC_G0", /* name */
1044 FALSE
, /* partial_inplace */
1045 0xffffffff, /* src_mask */
1046 0xffffffff, /* dst_mask */
1047 TRUE
), /* pcrel_offset */
1049 HOWTO (R_ARM_LDC_PC_G1
, /* type */
1051 2, /* size (0 = byte, 1 = short, 2 = long) */
1053 TRUE
, /* pc_relative */
1055 complain_overflow_dont
,/* complain_on_overflow */
1056 bfd_elf_generic_reloc
, /* special_function */
1057 "R_ARM_LDC_PC_G1", /* name */
1058 FALSE
, /* partial_inplace */
1059 0xffffffff, /* src_mask */
1060 0xffffffff, /* dst_mask */
1061 TRUE
), /* pcrel_offset */
1063 HOWTO (R_ARM_LDC_PC_G2
, /* type */
1065 2, /* size (0 = byte, 1 = short, 2 = long) */
1067 TRUE
, /* pc_relative */
1069 complain_overflow_dont
,/* complain_on_overflow */
1070 bfd_elf_generic_reloc
, /* special_function */
1071 "R_ARM_LDC_PC_G2", /* name */
1072 FALSE
, /* partial_inplace */
1073 0xffffffff, /* src_mask */
1074 0xffffffff, /* dst_mask */
1075 TRUE
), /* pcrel_offset */
1077 HOWTO (R_ARM_ALU_SB_G0_NC
, /* type */
1079 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 TRUE
, /* pc_relative */
1083 complain_overflow_dont
,/* complain_on_overflow */
1084 bfd_elf_generic_reloc
, /* special_function */
1085 "R_ARM_ALU_SB_G0_NC", /* name */
1086 FALSE
, /* partial_inplace */
1087 0xffffffff, /* src_mask */
1088 0xffffffff, /* dst_mask */
1089 TRUE
), /* pcrel_offset */
1091 HOWTO (R_ARM_ALU_SB_G0
, /* type */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 TRUE
, /* pc_relative */
1097 complain_overflow_dont
,/* complain_on_overflow */
1098 bfd_elf_generic_reloc
, /* special_function */
1099 "R_ARM_ALU_SB_G0", /* name */
1100 FALSE
, /* partial_inplace */
1101 0xffffffff, /* src_mask */
1102 0xffffffff, /* dst_mask */
1103 TRUE
), /* pcrel_offset */
1105 HOWTO (R_ARM_ALU_SB_G1_NC
, /* type */
1107 2, /* size (0 = byte, 1 = short, 2 = long) */
1109 TRUE
, /* pc_relative */
1111 complain_overflow_dont
,/* complain_on_overflow */
1112 bfd_elf_generic_reloc
, /* special_function */
1113 "R_ARM_ALU_SB_G1_NC", /* name */
1114 FALSE
, /* partial_inplace */
1115 0xffffffff, /* src_mask */
1116 0xffffffff, /* dst_mask */
1117 TRUE
), /* pcrel_offset */
1119 HOWTO (R_ARM_ALU_SB_G1
, /* type */
1121 2, /* size (0 = byte, 1 = short, 2 = long) */
1123 TRUE
, /* pc_relative */
1125 complain_overflow_dont
,/* complain_on_overflow */
1126 bfd_elf_generic_reloc
, /* special_function */
1127 "R_ARM_ALU_SB_G1", /* name */
1128 FALSE
, /* partial_inplace */
1129 0xffffffff, /* src_mask */
1130 0xffffffff, /* dst_mask */
1131 TRUE
), /* pcrel_offset */
1133 HOWTO (R_ARM_ALU_SB_G2
, /* type */
1135 2, /* size (0 = byte, 1 = short, 2 = long) */
1137 TRUE
, /* pc_relative */
1139 complain_overflow_dont
,/* complain_on_overflow */
1140 bfd_elf_generic_reloc
, /* special_function */
1141 "R_ARM_ALU_SB_G2", /* name */
1142 FALSE
, /* partial_inplace */
1143 0xffffffff, /* src_mask */
1144 0xffffffff, /* dst_mask */
1145 TRUE
), /* pcrel_offset */
1147 HOWTO (R_ARM_LDR_SB_G0
, /* type */
1149 2, /* size (0 = byte, 1 = short, 2 = long) */
1151 TRUE
, /* pc_relative */
1153 complain_overflow_dont
,/* complain_on_overflow */
1154 bfd_elf_generic_reloc
, /* special_function */
1155 "R_ARM_LDR_SB_G0", /* name */
1156 FALSE
, /* partial_inplace */
1157 0xffffffff, /* src_mask */
1158 0xffffffff, /* dst_mask */
1159 TRUE
), /* pcrel_offset */
1161 HOWTO (R_ARM_LDR_SB_G1
, /* type */
1163 2, /* size (0 = byte, 1 = short, 2 = long) */
1165 TRUE
, /* pc_relative */
1167 complain_overflow_dont
,/* complain_on_overflow */
1168 bfd_elf_generic_reloc
, /* special_function */
1169 "R_ARM_LDR_SB_G1", /* name */
1170 FALSE
, /* partial_inplace */
1171 0xffffffff, /* src_mask */
1172 0xffffffff, /* dst_mask */
1173 TRUE
), /* pcrel_offset */
1175 HOWTO (R_ARM_LDR_SB_G2
, /* type */
1177 2, /* size (0 = byte, 1 = short, 2 = long) */
1179 TRUE
, /* pc_relative */
1181 complain_overflow_dont
,/* complain_on_overflow */
1182 bfd_elf_generic_reloc
, /* special_function */
1183 "R_ARM_LDR_SB_G2", /* name */
1184 FALSE
, /* partial_inplace */
1185 0xffffffff, /* src_mask */
1186 0xffffffff, /* dst_mask */
1187 TRUE
), /* pcrel_offset */
1189 HOWTO (R_ARM_LDRS_SB_G0
, /* type */
1191 2, /* size (0 = byte, 1 = short, 2 = long) */
1193 TRUE
, /* pc_relative */
1195 complain_overflow_dont
,/* complain_on_overflow */
1196 bfd_elf_generic_reloc
, /* special_function */
1197 "R_ARM_LDRS_SB_G0", /* name */
1198 FALSE
, /* partial_inplace */
1199 0xffffffff, /* src_mask */
1200 0xffffffff, /* dst_mask */
1201 TRUE
), /* pcrel_offset */
1203 HOWTO (R_ARM_LDRS_SB_G1
, /* type */
1205 2, /* size (0 = byte, 1 = short, 2 = long) */
1207 TRUE
, /* pc_relative */
1209 complain_overflow_dont
,/* complain_on_overflow */
1210 bfd_elf_generic_reloc
, /* special_function */
1211 "R_ARM_LDRS_SB_G1", /* name */
1212 FALSE
, /* partial_inplace */
1213 0xffffffff, /* src_mask */
1214 0xffffffff, /* dst_mask */
1215 TRUE
), /* pcrel_offset */
1217 HOWTO (R_ARM_LDRS_SB_G2
, /* type */
1219 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 TRUE
, /* pc_relative */
1223 complain_overflow_dont
,/* complain_on_overflow */
1224 bfd_elf_generic_reloc
, /* special_function */
1225 "R_ARM_LDRS_SB_G2", /* name */
1226 FALSE
, /* partial_inplace */
1227 0xffffffff, /* src_mask */
1228 0xffffffff, /* dst_mask */
1229 TRUE
), /* pcrel_offset */
1231 HOWTO (R_ARM_LDC_SB_G0
, /* type */
1233 2, /* size (0 = byte, 1 = short, 2 = long) */
1235 TRUE
, /* pc_relative */
1237 complain_overflow_dont
,/* complain_on_overflow */
1238 bfd_elf_generic_reloc
, /* special_function */
1239 "R_ARM_LDC_SB_G0", /* name */
1240 FALSE
, /* partial_inplace */
1241 0xffffffff, /* src_mask */
1242 0xffffffff, /* dst_mask */
1243 TRUE
), /* pcrel_offset */
1245 HOWTO (R_ARM_LDC_SB_G1
, /* type */
1247 2, /* size (0 = byte, 1 = short, 2 = long) */
1249 TRUE
, /* pc_relative */
1251 complain_overflow_dont
,/* complain_on_overflow */
1252 bfd_elf_generic_reloc
, /* special_function */
1253 "R_ARM_LDC_SB_G1", /* name */
1254 FALSE
, /* partial_inplace */
1255 0xffffffff, /* src_mask */
1256 0xffffffff, /* dst_mask */
1257 TRUE
), /* pcrel_offset */
1259 HOWTO (R_ARM_LDC_SB_G2
, /* type */
1261 2, /* size (0 = byte, 1 = short, 2 = long) */
1263 TRUE
, /* pc_relative */
1265 complain_overflow_dont
,/* complain_on_overflow */
1266 bfd_elf_generic_reloc
, /* special_function */
1267 "R_ARM_LDC_SB_G2", /* name */
1268 FALSE
, /* partial_inplace */
1269 0xffffffff, /* src_mask */
1270 0xffffffff, /* dst_mask */
1271 TRUE
), /* pcrel_offset */
1273 /* End of group relocations. */
1275 HOWTO (R_ARM_MOVW_BREL_NC
, /* type */
1277 2, /* size (0 = byte, 1 = short, 2 = long) */
1279 FALSE
, /* pc_relative */
1281 complain_overflow_dont
,/* complain_on_overflow */
1282 bfd_elf_generic_reloc
, /* special_function */
1283 "R_ARM_MOVW_BREL_NC", /* name */
1284 FALSE
, /* partial_inplace */
1285 0x0000ffff, /* src_mask */
1286 0x0000ffff, /* dst_mask */
1287 FALSE
), /* pcrel_offset */
1289 HOWTO (R_ARM_MOVT_BREL
, /* type */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1293 FALSE
, /* pc_relative */
1295 complain_overflow_bitfield
,/* complain_on_overflow */
1296 bfd_elf_generic_reloc
, /* special_function */
1297 "R_ARM_MOVT_BREL", /* name */
1298 FALSE
, /* partial_inplace */
1299 0x0000ffff, /* src_mask */
1300 0x0000ffff, /* dst_mask */
1301 FALSE
), /* pcrel_offset */
1303 HOWTO (R_ARM_MOVW_BREL
, /* type */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1307 FALSE
, /* pc_relative */
1309 complain_overflow_dont
,/* complain_on_overflow */
1310 bfd_elf_generic_reloc
, /* special_function */
1311 "R_ARM_MOVW_BREL", /* name */
1312 FALSE
, /* partial_inplace */
1313 0x0000ffff, /* src_mask */
1314 0x0000ffff, /* dst_mask */
1315 FALSE
), /* pcrel_offset */
1317 HOWTO (R_ARM_THM_MOVW_BREL_NC
,/* type */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1321 FALSE
, /* pc_relative */
1323 complain_overflow_dont
,/* complain_on_overflow */
1324 bfd_elf_generic_reloc
, /* special_function */
1325 "R_ARM_THM_MOVW_BREL_NC",/* name */
1326 FALSE
, /* partial_inplace */
1327 0x040f70ff, /* src_mask */
1328 0x040f70ff, /* dst_mask */
1329 FALSE
), /* pcrel_offset */
1331 HOWTO (R_ARM_THM_MOVT_BREL
, /* type */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1335 FALSE
, /* pc_relative */
1337 complain_overflow_bitfield
,/* complain_on_overflow */
1338 bfd_elf_generic_reloc
, /* special_function */
1339 "R_ARM_THM_MOVT_BREL", /* name */
1340 FALSE
, /* partial_inplace */
1341 0x040f70ff, /* src_mask */
1342 0x040f70ff, /* dst_mask */
1343 FALSE
), /* pcrel_offset */
1345 HOWTO (R_ARM_THM_MOVW_BREL
, /* type */
1347 2, /* size (0 = byte, 1 = short, 2 = long) */
1349 FALSE
, /* pc_relative */
1351 complain_overflow_dont
,/* complain_on_overflow */
1352 bfd_elf_generic_reloc
, /* special_function */
1353 "R_ARM_THM_MOVW_BREL", /* name */
1354 FALSE
, /* partial_inplace */
1355 0x040f70ff, /* src_mask */
1356 0x040f70ff, /* dst_mask */
1357 FALSE
), /* pcrel_offset */
1359 HOWTO (R_ARM_TLS_GOTDESC
, /* type */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1363 FALSE
, /* pc_relative */
1365 complain_overflow_bitfield
,/* complain_on_overflow */
1366 NULL
, /* special_function */
1367 "R_ARM_TLS_GOTDESC", /* name */
1368 TRUE
, /* partial_inplace */
1369 0xffffffff, /* src_mask */
1370 0xffffffff, /* dst_mask */
1371 FALSE
), /* pcrel_offset */
1373 HOWTO (R_ARM_TLS_CALL
, /* type */
1375 2, /* size (0 = byte, 1 = short, 2 = long) */
1377 FALSE
, /* pc_relative */
1379 complain_overflow_dont
,/* complain_on_overflow */
1380 bfd_elf_generic_reloc
, /* special_function */
1381 "R_ARM_TLS_CALL", /* name */
1382 FALSE
, /* partial_inplace */
1383 0x00ffffff, /* src_mask */
1384 0x00ffffff, /* dst_mask */
1385 FALSE
), /* pcrel_offset */
1387 HOWTO (R_ARM_TLS_DESCSEQ
, /* type */
1389 2, /* size (0 = byte, 1 = short, 2 = long) */
1391 FALSE
, /* pc_relative */
1393 complain_overflow_bitfield
,/* complain_on_overflow */
1394 bfd_elf_generic_reloc
, /* special_function */
1395 "R_ARM_TLS_DESCSEQ", /* name */
1396 FALSE
, /* partial_inplace */
1397 0x00000000, /* src_mask */
1398 0x00000000, /* dst_mask */
1399 FALSE
), /* pcrel_offset */
1401 HOWTO (R_ARM_THM_TLS_CALL
, /* type */
1403 2, /* size (0 = byte, 1 = short, 2 = long) */
1405 FALSE
, /* pc_relative */
1407 complain_overflow_dont
,/* complain_on_overflow */
1408 bfd_elf_generic_reloc
, /* special_function */
1409 "R_ARM_THM_TLS_CALL", /* name */
1410 FALSE
, /* partial_inplace */
1411 0x07ff07ff, /* src_mask */
1412 0x07ff07ff, /* dst_mask */
1413 FALSE
), /* pcrel_offset */
1415 HOWTO (R_ARM_PLT32_ABS
, /* type */
1417 2, /* size (0 = byte, 1 = short, 2 = long) */
1419 FALSE
, /* pc_relative */
1421 complain_overflow_dont
,/* complain_on_overflow */
1422 bfd_elf_generic_reloc
, /* special_function */
1423 "R_ARM_PLT32_ABS", /* name */
1424 FALSE
, /* partial_inplace */
1425 0xffffffff, /* src_mask */
1426 0xffffffff, /* dst_mask */
1427 FALSE
), /* pcrel_offset */
1429 HOWTO (R_ARM_GOT_ABS
, /* type */
1431 2, /* size (0 = byte, 1 = short, 2 = long) */
1433 FALSE
, /* pc_relative */
1435 complain_overflow_dont
,/* complain_on_overflow */
1436 bfd_elf_generic_reloc
, /* special_function */
1437 "R_ARM_GOT_ABS", /* name */
1438 FALSE
, /* partial_inplace */
1439 0xffffffff, /* src_mask */
1440 0xffffffff, /* dst_mask */
1441 FALSE
), /* pcrel_offset */
1443 HOWTO (R_ARM_GOT_PREL
, /* type */
1445 2, /* size (0 = byte, 1 = short, 2 = long) */
1447 TRUE
, /* pc_relative */
1449 complain_overflow_dont
, /* complain_on_overflow */
1450 bfd_elf_generic_reloc
, /* special_function */
1451 "R_ARM_GOT_PREL", /* name */
1452 FALSE
, /* partial_inplace */
1453 0xffffffff, /* src_mask */
1454 0xffffffff, /* dst_mask */
1455 TRUE
), /* pcrel_offset */
1457 HOWTO (R_ARM_GOT_BREL12
, /* type */
1459 2, /* size (0 = byte, 1 = short, 2 = long) */
1461 FALSE
, /* pc_relative */
1463 complain_overflow_bitfield
,/* complain_on_overflow */
1464 bfd_elf_generic_reloc
, /* special_function */
1465 "R_ARM_GOT_BREL12", /* name */
1466 FALSE
, /* partial_inplace */
1467 0x00000fff, /* src_mask */
1468 0x00000fff, /* dst_mask */
1469 FALSE
), /* pcrel_offset */
1471 HOWTO (R_ARM_GOTOFF12
, /* type */
1473 2, /* size (0 = byte, 1 = short, 2 = long) */
1475 FALSE
, /* pc_relative */
1477 complain_overflow_bitfield
,/* complain_on_overflow */
1478 bfd_elf_generic_reloc
, /* special_function */
1479 "R_ARM_GOTOFF12", /* name */
1480 FALSE
, /* partial_inplace */
1481 0x00000fff, /* src_mask */
1482 0x00000fff, /* dst_mask */
1483 FALSE
), /* pcrel_offset */
1485 EMPTY_HOWTO (R_ARM_GOTRELAX
), /* reserved for future GOT-load optimizations */
1487 /* GNU extension to record C++ vtable member usage */
1488 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
1490 2, /* size (0 = byte, 1 = short, 2 = long) */
1492 FALSE
, /* pc_relative */
1494 complain_overflow_dont
, /* complain_on_overflow */
1495 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
1496 "R_ARM_GNU_VTENTRY", /* name */
1497 FALSE
, /* partial_inplace */
1500 FALSE
), /* pcrel_offset */
1502 /* GNU extension to record C++ vtable hierarchy */
1503 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
1505 2, /* size (0 = byte, 1 = short, 2 = long) */
1507 FALSE
, /* pc_relative */
1509 complain_overflow_dont
, /* complain_on_overflow */
1510 NULL
, /* special_function */
1511 "R_ARM_GNU_VTINHERIT", /* name */
1512 FALSE
, /* partial_inplace */
1515 FALSE
), /* pcrel_offset */
1517 HOWTO (R_ARM_THM_JUMP11
, /* type */
1519 1, /* size (0 = byte, 1 = short, 2 = long) */
1521 TRUE
, /* pc_relative */
1523 complain_overflow_signed
, /* complain_on_overflow */
1524 bfd_elf_generic_reloc
, /* special_function */
1525 "R_ARM_THM_JUMP11", /* name */
1526 FALSE
, /* partial_inplace */
1527 0x000007ff, /* src_mask */
1528 0x000007ff, /* dst_mask */
1529 TRUE
), /* pcrel_offset */
1531 HOWTO (R_ARM_THM_JUMP8
, /* type */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1535 TRUE
, /* pc_relative */
1537 complain_overflow_signed
, /* complain_on_overflow */
1538 bfd_elf_generic_reloc
, /* special_function */
1539 "R_ARM_THM_JUMP8", /* name */
1540 FALSE
, /* partial_inplace */
1541 0x000000ff, /* src_mask */
1542 0x000000ff, /* dst_mask */
1543 TRUE
), /* pcrel_offset */
1545 /* TLS relocations */
1546 HOWTO (R_ARM_TLS_GD32
, /* type */
1548 2, /* size (0 = byte, 1 = short, 2 = long) */
1550 FALSE
, /* pc_relative */
1552 complain_overflow_bitfield
,/* complain_on_overflow */
1553 NULL
, /* special_function */
1554 "R_ARM_TLS_GD32", /* name */
1555 TRUE
, /* partial_inplace */
1556 0xffffffff, /* src_mask */
1557 0xffffffff, /* dst_mask */
1558 FALSE
), /* pcrel_offset */
1560 HOWTO (R_ARM_TLS_LDM32
, /* type */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1564 FALSE
, /* pc_relative */
1566 complain_overflow_bitfield
,/* complain_on_overflow */
1567 bfd_elf_generic_reloc
, /* special_function */
1568 "R_ARM_TLS_LDM32", /* name */
1569 TRUE
, /* partial_inplace */
1570 0xffffffff, /* src_mask */
1571 0xffffffff, /* dst_mask */
1572 FALSE
), /* pcrel_offset */
1574 HOWTO (R_ARM_TLS_LDO32
, /* type */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1578 FALSE
, /* pc_relative */
1580 complain_overflow_bitfield
,/* complain_on_overflow */
1581 bfd_elf_generic_reloc
, /* special_function */
1582 "R_ARM_TLS_LDO32", /* name */
1583 TRUE
, /* partial_inplace */
1584 0xffffffff, /* src_mask */
1585 0xffffffff, /* dst_mask */
1586 FALSE
), /* pcrel_offset */
1588 HOWTO (R_ARM_TLS_IE32
, /* type */
1590 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 FALSE
, /* pc_relative */
1594 complain_overflow_bitfield
,/* complain_on_overflow */
1595 NULL
, /* special_function */
1596 "R_ARM_TLS_IE32", /* name */
1597 TRUE
, /* partial_inplace */
1598 0xffffffff, /* src_mask */
1599 0xffffffff, /* dst_mask */
1600 FALSE
), /* pcrel_offset */
1602 HOWTO (R_ARM_TLS_LE32
, /* type */
1604 2, /* size (0 = byte, 1 = short, 2 = long) */
1606 FALSE
, /* pc_relative */
1608 complain_overflow_bitfield
,/* complain_on_overflow */
1609 bfd_elf_generic_reloc
, /* special_function */
1610 "R_ARM_TLS_LE32", /* name */
1611 TRUE
, /* partial_inplace */
1612 0xffffffff, /* src_mask */
1613 0xffffffff, /* dst_mask */
1614 FALSE
), /* pcrel_offset */
1616 HOWTO (R_ARM_TLS_LDO12
, /* type */
1618 2, /* size (0 = byte, 1 = short, 2 = long) */
1620 FALSE
, /* pc_relative */
1622 complain_overflow_bitfield
,/* complain_on_overflow */
1623 bfd_elf_generic_reloc
, /* special_function */
1624 "R_ARM_TLS_LDO12", /* name */
1625 FALSE
, /* partial_inplace */
1626 0x00000fff, /* src_mask */
1627 0x00000fff, /* dst_mask */
1628 FALSE
), /* pcrel_offset */
1630 HOWTO (R_ARM_TLS_LE12
, /* type */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1634 FALSE
, /* pc_relative */
1636 complain_overflow_bitfield
,/* complain_on_overflow */
1637 bfd_elf_generic_reloc
, /* special_function */
1638 "R_ARM_TLS_LE12", /* name */
1639 FALSE
, /* partial_inplace */
1640 0x00000fff, /* src_mask */
1641 0x00000fff, /* dst_mask */
1642 FALSE
), /* pcrel_offset */
1644 HOWTO (R_ARM_TLS_IE12GP
, /* type */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 FALSE
, /* pc_relative */
1650 complain_overflow_bitfield
,/* complain_on_overflow */
1651 bfd_elf_generic_reloc
, /* special_function */
1652 "R_ARM_TLS_IE12GP", /* name */
1653 FALSE
, /* partial_inplace */
1654 0x00000fff, /* src_mask */
1655 0x00000fff, /* dst_mask */
1656 FALSE
), /* pcrel_offset */
1658 /* 112-127 private relocations. */
1676 /* R_ARM_ME_TOO, obsolete. */
1679 HOWTO (R_ARM_THM_TLS_DESCSEQ
, /* type */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 FALSE
, /* pc_relative */
1685 complain_overflow_bitfield
,/* complain_on_overflow */
1686 bfd_elf_generic_reloc
, /* special_function */
1687 "R_ARM_THM_TLS_DESCSEQ",/* name */
1688 FALSE
, /* partial_inplace */
1689 0x00000000, /* src_mask */
1690 0x00000000, /* dst_mask */
1691 FALSE
), /* pcrel_offset */
1695 static reloc_howto_type elf32_arm_howto_table_2
[1] =
1697 HOWTO (R_ARM_IRELATIVE
, /* type */
1699 2, /* size (0 = byte, 1 = short, 2 = long) */
1701 FALSE
, /* pc_relative */
1703 complain_overflow_bitfield
,/* complain_on_overflow */
1704 bfd_elf_generic_reloc
, /* special_function */
1705 "R_ARM_IRELATIVE", /* name */
1706 TRUE
, /* partial_inplace */
1707 0xffffffff, /* src_mask */
1708 0xffffffff, /* dst_mask */
1709 FALSE
) /* pcrel_offset */
1712 /* 249-255 extended, currently unused, relocations: */
1713 static reloc_howto_type elf32_arm_howto_table_3
[4] =
1715 HOWTO (R_ARM_RREL32
, /* type */
1717 0, /* size (0 = byte, 1 = short, 2 = long) */
1719 FALSE
, /* pc_relative */
1721 complain_overflow_dont
,/* complain_on_overflow */
1722 bfd_elf_generic_reloc
, /* special_function */
1723 "R_ARM_RREL32", /* name */
1724 FALSE
, /* partial_inplace */
1727 FALSE
), /* pcrel_offset */
1729 HOWTO (R_ARM_RABS32
, /* type */
1731 0, /* size (0 = byte, 1 = short, 2 = long) */
1733 FALSE
, /* pc_relative */
1735 complain_overflow_dont
,/* complain_on_overflow */
1736 bfd_elf_generic_reloc
, /* special_function */
1737 "R_ARM_RABS32", /* name */
1738 FALSE
, /* partial_inplace */
1741 FALSE
), /* pcrel_offset */
1743 HOWTO (R_ARM_RPC24
, /* type */
1745 0, /* size (0 = byte, 1 = short, 2 = long) */
1747 FALSE
, /* pc_relative */
1749 complain_overflow_dont
,/* complain_on_overflow */
1750 bfd_elf_generic_reloc
, /* special_function */
1751 "R_ARM_RPC24", /* name */
1752 FALSE
, /* partial_inplace */
1755 FALSE
), /* pcrel_offset */
1757 HOWTO (R_ARM_RBASE
, /* type */
1759 0, /* size (0 = byte, 1 = short, 2 = long) */
1761 FALSE
, /* pc_relative */
1763 complain_overflow_dont
,/* complain_on_overflow */
1764 bfd_elf_generic_reloc
, /* special_function */
1765 "R_ARM_RBASE", /* name */
1766 FALSE
, /* partial_inplace */
1769 FALSE
) /* pcrel_offset */
1772 static reloc_howto_type
*
1773 elf32_arm_howto_from_type (unsigned int r_type
)
1775 if (r_type
< ARRAY_SIZE (elf32_arm_howto_table_1
))
1776 return &elf32_arm_howto_table_1
[r_type
];
1778 if (r_type
== R_ARM_IRELATIVE
)
1779 return &elf32_arm_howto_table_2
[r_type
- R_ARM_IRELATIVE
];
1781 if (r_type
>= R_ARM_RREL32
1782 && r_type
< R_ARM_RREL32
+ ARRAY_SIZE (elf32_arm_howto_table_3
))
1783 return &elf32_arm_howto_table_3
[r_type
- R_ARM_RREL32
];
1789 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
1790 Elf_Internal_Rela
* elf_reloc
)
1792 unsigned int r_type
;
1794 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
1795 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
1798 struct elf32_arm_reloc_map
1800 bfd_reloc_code_real_type bfd_reloc_val
;
1801 unsigned char elf_reloc_val
;
1804 /* All entries in this list must also be present in elf32_arm_howto_table. */
1805 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
1807 {BFD_RELOC_NONE
, R_ARM_NONE
},
1808 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
1809 {BFD_RELOC_ARM_PCREL_CALL
, R_ARM_CALL
},
1810 {BFD_RELOC_ARM_PCREL_JUMP
, R_ARM_JUMP24
},
1811 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
1812 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
1813 {BFD_RELOC_32
, R_ARM_ABS32
},
1814 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
1815 {BFD_RELOC_8
, R_ARM_ABS8
},
1816 {BFD_RELOC_16
, R_ARM_ABS16
},
1817 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
1818 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
1819 {BFD_RELOC_THUMB_PCREL_BRANCH25
, R_ARM_THM_JUMP24
},
1820 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_CALL
},
1821 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_JUMP11
},
1822 {BFD_RELOC_THUMB_PCREL_BRANCH20
, R_ARM_THM_JUMP19
},
1823 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_JUMP8
},
1824 {BFD_RELOC_THUMB_PCREL_BRANCH7
, R_ARM_THM_JUMP6
},
1825 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
1826 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
1827 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
1828 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF32
},
1829 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
1830 {BFD_RELOC_ARM_GOT_PREL
, R_ARM_GOT_PREL
},
1831 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
1832 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1833 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
1834 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
1835 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
1836 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
1837 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
},
1838 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1839 {BFD_RELOC_ARM_TLS_GOTDESC
, R_ARM_TLS_GOTDESC
},
1840 {BFD_RELOC_ARM_TLS_CALL
, R_ARM_TLS_CALL
},
1841 {BFD_RELOC_ARM_THM_TLS_CALL
, R_ARM_THM_TLS_CALL
},
1842 {BFD_RELOC_ARM_TLS_DESCSEQ
, R_ARM_TLS_DESCSEQ
},
1843 {BFD_RELOC_ARM_THM_TLS_DESCSEQ
, R_ARM_THM_TLS_DESCSEQ
},
1844 {BFD_RELOC_ARM_TLS_DESC
, R_ARM_TLS_DESC
},
1845 {BFD_RELOC_ARM_TLS_GD32
, R_ARM_TLS_GD32
},
1846 {BFD_RELOC_ARM_TLS_LDO32
, R_ARM_TLS_LDO32
},
1847 {BFD_RELOC_ARM_TLS_LDM32
, R_ARM_TLS_LDM32
},
1848 {BFD_RELOC_ARM_TLS_DTPMOD32
, R_ARM_TLS_DTPMOD32
},
1849 {BFD_RELOC_ARM_TLS_DTPOFF32
, R_ARM_TLS_DTPOFF32
},
1850 {BFD_RELOC_ARM_TLS_TPOFF32
, R_ARM_TLS_TPOFF32
},
1851 {BFD_RELOC_ARM_TLS_IE32
, R_ARM_TLS_IE32
},
1852 {BFD_RELOC_ARM_TLS_LE32
, R_ARM_TLS_LE32
},
1853 {BFD_RELOC_ARM_IRELATIVE
, R_ARM_IRELATIVE
},
1854 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
1855 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
},
1856 {BFD_RELOC_ARM_MOVW
, R_ARM_MOVW_ABS_NC
},
1857 {BFD_RELOC_ARM_MOVT
, R_ARM_MOVT_ABS
},
1858 {BFD_RELOC_ARM_MOVW_PCREL
, R_ARM_MOVW_PREL_NC
},
1859 {BFD_RELOC_ARM_MOVT_PCREL
, R_ARM_MOVT_PREL
},
1860 {BFD_RELOC_ARM_THUMB_MOVW
, R_ARM_THM_MOVW_ABS_NC
},
1861 {BFD_RELOC_ARM_THUMB_MOVT
, R_ARM_THM_MOVT_ABS
},
1862 {BFD_RELOC_ARM_THUMB_MOVW_PCREL
, R_ARM_THM_MOVW_PREL_NC
},
1863 {BFD_RELOC_ARM_THUMB_MOVT_PCREL
, R_ARM_THM_MOVT_PREL
},
1864 {BFD_RELOC_ARM_ALU_PC_G0_NC
, R_ARM_ALU_PC_G0_NC
},
1865 {BFD_RELOC_ARM_ALU_PC_G0
, R_ARM_ALU_PC_G0
},
1866 {BFD_RELOC_ARM_ALU_PC_G1_NC
, R_ARM_ALU_PC_G1_NC
},
1867 {BFD_RELOC_ARM_ALU_PC_G1
, R_ARM_ALU_PC_G1
},
1868 {BFD_RELOC_ARM_ALU_PC_G2
, R_ARM_ALU_PC_G2
},
1869 {BFD_RELOC_ARM_LDR_PC_G0
, R_ARM_LDR_PC_G0
},
1870 {BFD_RELOC_ARM_LDR_PC_G1
, R_ARM_LDR_PC_G1
},
1871 {BFD_RELOC_ARM_LDR_PC_G2
, R_ARM_LDR_PC_G2
},
1872 {BFD_RELOC_ARM_LDRS_PC_G0
, R_ARM_LDRS_PC_G0
},
1873 {BFD_RELOC_ARM_LDRS_PC_G1
, R_ARM_LDRS_PC_G1
},
1874 {BFD_RELOC_ARM_LDRS_PC_G2
, R_ARM_LDRS_PC_G2
},
1875 {BFD_RELOC_ARM_LDC_PC_G0
, R_ARM_LDC_PC_G0
},
1876 {BFD_RELOC_ARM_LDC_PC_G1
, R_ARM_LDC_PC_G1
},
1877 {BFD_RELOC_ARM_LDC_PC_G2
, R_ARM_LDC_PC_G2
},
1878 {BFD_RELOC_ARM_ALU_SB_G0_NC
, R_ARM_ALU_SB_G0_NC
},
1879 {BFD_RELOC_ARM_ALU_SB_G0
, R_ARM_ALU_SB_G0
},
1880 {BFD_RELOC_ARM_ALU_SB_G1_NC
, R_ARM_ALU_SB_G1_NC
},
1881 {BFD_RELOC_ARM_ALU_SB_G1
, R_ARM_ALU_SB_G1
},
1882 {BFD_RELOC_ARM_ALU_SB_G2
, R_ARM_ALU_SB_G2
},
1883 {BFD_RELOC_ARM_LDR_SB_G0
, R_ARM_LDR_SB_G0
},
1884 {BFD_RELOC_ARM_LDR_SB_G1
, R_ARM_LDR_SB_G1
},
1885 {BFD_RELOC_ARM_LDR_SB_G2
, R_ARM_LDR_SB_G2
},
1886 {BFD_RELOC_ARM_LDRS_SB_G0
, R_ARM_LDRS_SB_G0
},
1887 {BFD_RELOC_ARM_LDRS_SB_G1
, R_ARM_LDRS_SB_G1
},
1888 {BFD_RELOC_ARM_LDRS_SB_G2
, R_ARM_LDRS_SB_G2
},
1889 {BFD_RELOC_ARM_LDC_SB_G0
, R_ARM_LDC_SB_G0
},
1890 {BFD_RELOC_ARM_LDC_SB_G1
, R_ARM_LDC_SB_G1
},
1891 {BFD_RELOC_ARM_LDC_SB_G2
, R_ARM_LDC_SB_G2
},
1892 {BFD_RELOC_ARM_V4BX
, R_ARM_V4BX
}
1895 static reloc_howto_type
*
1896 elf32_arm_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1897 bfd_reloc_code_real_type code
)
1901 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_reloc_map
); i
++)
1902 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
1903 return elf32_arm_howto_from_type (elf32_arm_reloc_map
[i
].elf_reloc_val
);
1908 static reloc_howto_type
*
1909 elf32_arm_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1914 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_1
); i
++)
1915 if (elf32_arm_howto_table_1
[i
].name
!= NULL
1916 && strcasecmp (elf32_arm_howto_table_1
[i
].name
, r_name
) == 0)
1917 return &elf32_arm_howto_table_1
[i
];
1919 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_2
); i
++)
1920 if (elf32_arm_howto_table_2
[i
].name
!= NULL
1921 && strcasecmp (elf32_arm_howto_table_2
[i
].name
, r_name
) == 0)
1922 return &elf32_arm_howto_table_2
[i
];
1924 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_3
); i
++)
1925 if (elf32_arm_howto_table_3
[i
].name
!= NULL
1926 && strcasecmp (elf32_arm_howto_table_3
[i
].name
, r_name
) == 0)
1927 return &elf32_arm_howto_table_3
[i
];
1932 /* Support for core dump NOTE sections. */
1935 elf32_arm_nabi_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1940 switch (note
->descsz
)
1945 case 148: /* Linux/ARM 32-bit. */
1947 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
1950 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
1959 /* Make a ".reg/999" section. */
1960 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
1961 size
, note
->descpos
+ offset
);
1965 elf32_arm_nabi_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
1967 switch (note
->descsz
)
1972 case 124: /* Linux/ARM elf_prpsinfo. */
1973 elf_tdata (abfd
)->core
->pid
1974 = bfd_get_32 (abfd
, note
->descdata
+ 12);
1975 elf_tdata (abfd
)->core
->program
1976 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
1977 elf_tdata (abfd
)->core
->command
1978 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
1981 /* Note that for some reason, a spurious space is tacked
1982 onto the end of the args in some (at least one anyway)
1983 implementations, so strip it off if it exists. */
1985 char *command
= elf_tdata (abfd
)->core
->command
;
1986 int n
= strlen (command
);
1988 if (0 < n
&& command
[n
- 1] == ' ')
1989 command
[n
- 1] = '\0';
1996 elf32_arm_nabi_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
2009 va_start (ap
, note_type
);
2010 memset (data
, 0, sizeof (data
));
2011 strncpy (data
+ 28, va_arg (ap
, const char *), 16);
2012 strncpy (data
+ 44, va_arg (ap
, const char *), 80);
2015 return elfcore_write_note (abfd
, buf
, bufsiz
,
2016 "CORE", note_type
, data
, sizeof (data
));
2027 va_start (ap
, note_type
);
2028 memset (data
, 0, sizeof (data
));
2029 pid
= va_arg (ap
, long);
2030 bfd_put_32 (abfd
, pid
, data
+ 24);
2031 cursig
= va_arg (ap
, int);
2032 bfd_put_16 (abfd
, cursig
, data
+ 12);
2033 greg
= va_arg (ap
, const void *);
2034 memcpy (data
+ 72, greg
, 72);
2037 return elfcore_write_note (abfd
, buf
, bufsiz
,
2038 "CORE", note_type
, data
, sizeof (data
));
2043 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
2044 #define TARGET_LITTLE_NAME "elf32-littlearm"
2045 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
2046 #define TARGET_BIG_NAME "elf32-bigarm"
2048 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
2049 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
2050 #define elf_backend_write_core_note elf32_arm_nabi_write_core_note
2052 typedef unsigned long int insn32
;
2053 typedef unsigned short int insn16
;
2055 /* In lieu of proper flags, assume all EABIv4 or later objects are
2057 #define INTERWORK_FLAG(abfd) \
2058 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
2059 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2060 || ((abfd)->flags & BFD_LINKER_CREATED))
2062 /* The linker script knows the section names for placement.
2063 The entry_names are used to do simple name mangling on the stubs.
2064 Given a function name, and its type, the stub can be found. The
2065 name can be changed. The only requirement is the %s be present. */
2066 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2067 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2069 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2070 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2072 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2073 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2075 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2076 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2078 #define STUB_ENTRY_NAME "__%s_veneer"
2080 /* The name of the dynamic interpreter. This is put in the .interp
2082 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2084 static const unsigned long tls_trampoline
[] =
2086 0xe08e0000, /* add r0, lr, r0 */
2087 0xe5901004, /* ldr r1, [r0,#4] */
2088 0xe12fff11, /* bx r1 */
2091 static const unsigned long dl_tlsdesc_lazy_trampoline
[] =
2093 0xe52d2004, /* push {r2} */
2094 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2095 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2096 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2097 0xe081100f, /* 2: add r1, pc */
2098 0xe12fff12, /* bx r2 */
2099 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2100 + dl_tlsdesc_lazy_resolver(GOT) */
2101 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2104 #ifdef FOUR_WORD_PLT
2106 /* The first entry in a procedure linkage table looks like
2107 this. It is set up so that any shared library function that is
2108 called before the relocation has been set up calls the dynamic
2110 static const bfd_vma elf32_arm_plt0_entry
[] =
2112 0xe52de004, /* str lr, [sp, #-4]! */
2113 0xe59fe010, /* ldr lr, [pc, #16] */
2114 0xe08fe00e, /* add lr, pc, lr */
2115 0xe5bef008, /* ldr pc, [lr, #8]! */
2118 /* Subsequent entries in a procedure linkage table look like
2120 static const bfd_vma elf32_arm_plt_entry
[] =
2122 0xe28fc600, /* add ip, pc, #NN */
2123 0xe28cca00, /* add ip, ip, #NN */
2124 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2125 0x00000000, /* unused */
2130 /* The first entry in a procedure linkage table looks like
2131 this. It is set up so that any shared library function that is
2132 called before the relocation has been set up calls the dynamic
2134 static const bfd_vma elf32_arm_plt0_entry
[] =
2136 0xe52de004, /* str lr, [sp, #-4]! */
2137 0xe59fe004, /* ldr lr, [pc, #4] */
2138 0xe08fe00e, /* add lr, pc, lr */
2139 0xe5bef008, /* ldr pc, [lr, #8]! */
2140 0x00000000, /* &GOT[0] - . */
2143 /* Subsequent entries in a procedure linkage table look like
2145 static const bfd_vma elf32_arm_plt_entry
[] =
2147 0xe28fc600, /* add ip, pc, #0xNN00000 */
2148 0xe28cca00, /* add ip, ip, #0xNN000 */
2149 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2154 /* The format of the first entry in the procedure linkage table
2155 for a VxWorks executable. */
2156 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry
[] =
2158 0xe52dc008, /* str ip,[sp,#-8]! */
2159 0xe59fc000, /* ldr ip,[pc] */
2160 0xe59cf008, /* ldr pc,[ip,#8] */
2161 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2164 /* The format of subsequent entries in a VxWorks executable. */
2165 static const bfd_vma elf32_arm_vxworks_exec_plt_entry
[] =
2167 0xe59fc000, /* ldr ip,[pc] */
2168 0xe59cf000, /* ldr pc,[ip] */
2169 0x00000000, /* .long @got */
2170 0xe59fc000, /* ldr ip,[pc] */
2171 0xea000000, /* b _PLT */
2172 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2175 /* The format of entries in a VxWorks shared library. */
2176 static const bfd_vma elf32_arm_vxworks_shared_plt_entry
[] =
2178 0xe59fc000, /* ldr ip,[pc] */
2179 0xe79cf009, /* ldr pc,[ip,r9] */
2180 0x00000000, /* .long @got */
2181 0xe59fc000, /* ldr ip,[pc] */
2182 0xe599f008, /* ldr pc,[r9,#8] */
2183 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2186 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2187 #define PLT_THUMB_STUB_SIZE 4
2188 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
2194 /* The entries in a PLT when using a DLL-based target with multiple
2196 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
2198 0xe51ff004, /* ldr pc, [pc, #-4] */
2199 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2202 /* The first entry in a procedure linkage table looks like
2203 this. It is set up so that any shared library function that is
2204 called before the relocation has been set up calls the dynamic
2206 static const bfd_vma elf32_arm_nacl_plt0_entry
[] =
2209 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2210 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2211 0xe08cc00f, /* add ip, ip, pc */
2212 0xe52dc008, /* str ip, [sp, #-8]! */
2213 /* Second bundle: */
2214 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2215 0xe59cc000, /* ldr ip, [ip] */
2216 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2217 0xe12fff1c, /* bx ip */
2219 0xe320f000, /* nop */
2220 0xe320f000, /* nop */
2221 0xe320f000, /* nop */
2223 0xe50dc004, /* str ip, [sp, #-4] */
2224 /* Fourth bundle: */
2225 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2226 0xe59cc000, /* ldr ip, [ip] */
2227 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2228 0xe12fff1c, /* bx ip */
2230 #define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2232 /* Subsequent entries in a procedure linkage table look like this. */
2233 static const bfd_vma elf32_arm_nacl_plt_entry
[] =
2235 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2236 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2237 0xe08cc00f, /* add ip, ip, pc */
2238 0xea000000, /* b .Lplt_tail */
2241 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2242 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2243 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2244 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2245 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2246 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2256 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2257 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2258 is inserted in arm_build_one_stub(). */
2259 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2260 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2261 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2262 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2263 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2264 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2269 enum stub_insn_type type
;
2270 unsigned int r_type
;
2274 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2275 to reach the stub if necessary. */
2276 static const insn_sequence elf32_arm_stub_long_branch_any_any
[] =
2278 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2279 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2282 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2284 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb
[] =
2286 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2287 ARM_INSN (0xe12fff1c), /* bx ip */
2288 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2291 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2292 static const insn_sequence elf32_arm_stub_long_branch_thumb_only
[] =
2294 THUMB16_INSN (0xb401), /* push {r0} */
2295 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2296 THUMB16_INSN (0x4684), /* mov ip, r0 */
2297 THUMB16_INSN (0xbc01), /* pop {r0} */
2298 THUMB16_INSN (0x4760), /* bx ip */
2299 THUMB16_INSN (0xbf00), /* nop */
2300 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2303 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2305 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb
[] =
2307 THUMB16_INSN (0x4778), /* bx pc */
2308 THUMB16_INSN (0x46c0), /* nop */
2309 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2310 ARM_INSN (0xe12fff1c), /* bx ip */
2311 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2314 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2316 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm
[] =
2318 THUMB16_INSN (0x4778), /* bx pc */
2319 THUMB16_INSN (0x46c0), /* nop */
2320 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2321 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2324 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2325 one, when the destination is close enough. */
2326 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm
[] =
2328 THUMB16_INSN (0x4778), /* bx pc */
2329 THUMB16_INSN (0x46c0), /* nop */
2330 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2333 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2334 blx to reach the stub if necessary. */
2335 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic
[] =
2337 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2338 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
2339 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2342 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2343 blx to reach the stub if necessary. We can not add into pc;
2344 it is not guaranteed to mode switch (different in ARMv6 and
2346 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic
[] =
2348 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2349 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2350 ARM_INSN (0xe12fff1c), /* bx ip */
2351 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2354 /* V4T ARM -> ARM long branch stub, PIC. */
2355 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic
[] =
2357 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2358 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2359 ARM_INSN (0xe12fff1c), /* bx ip */
2360 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2363 /* V4T Thumb -> ARM long branch stub, PIC. */
2364 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic
[] =
2366 THUMB16_INSN (0x4778), /* bx pc */
2367 THUMB16_INSN (0x46c0), /* nop */
2368 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2369 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
2370 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2373 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2375 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic
[] =
2377 THUMB16_INSN (0xb401), /* push {r0} */
2378 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2379 THUMB16_INSN (0x46fc), /* mov ip, pc */
2380 THUMB16_INSN (0x4484), /* add ip, r0 */
2381 THUMB16_INSN (0xbc01), /* pop {r0} */
2382 THUMB16_INSN (0x4760), /* bx ip */
2383 DATA_WORD (0, R_ARM_REL32
, 4), /* dcd R_ARM_REL32(X) */
2386 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2388 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic
[] =
2390 THUMB16_INSN (0x4778), /* bx pc */
2391 THUMB16_INSN (0x46c0), /* nop */
2392 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2393 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2394 ARM_INSN (0xe12fff1c), /* bx ip */
2395 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2398 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2399 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2400 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic
[] =
2402 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2403 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
2404 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2407 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2408 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2409 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic
[] =
2411 THUMB16_INSN (0x4778), /* bx pc */
2412 THUMB16_INSN (0x46c0), /* nop */
2413 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2414 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
2415 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2418 /* NaCl ARM -> ARM long branch stub. */
2419 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl
[] =
2421 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2422 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2423 ARM_INSN (0xe12fff1c), /* bx ip */
2424 ARM_INSN (0xe320f000), /* nop */
2425 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2426 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2427 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2428 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2431 /* NaCl ARM -> ARM long branch stub, PIC. */
2432 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl_pic
[] =
2434 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2435 ARM_INSN (0xe08cc00f), /* add ip, ip, pc */
2436 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2437 ARM_INSN (0xe12fff1c), /* bx ip */
2438 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2439 DATA_WORD (0, R_ARM_REL32
, 8), /* dcd R_ARM_REL32(X+8) */
2440 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2441 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2445 /* Cortex-A8 erratum-workaround stubs. */
2447 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2448 can't use a conditional branch to reach this stub). */
2450 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond
[] =
2452 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
2453 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2454 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2457 /* Stub used for b.w and bl.w instructions. */
2459 static const insn_sequence elf32_arm_stub_a8_veneer_b
[] =
2461 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2464 static const insn_sequence elf32_arm_stub_a8_veneer_bl
[] =
2466 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2469 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2470 instruction (which switches to ARM mode) to point to this stub. Jump to the
2471 real destination using an ARM-mode branch. */
2473 static const insn_sequence elf32_arm_stub_a8_veneer_blx
[] =
2475 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2478 /* For each section group there can be a specially created linker section
2479 to hold the stubs for that group. The name of the stub section is based
2480 upon the name of another section within that group with the suffix below
2483 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2484 create what appeared to be a linker stub section when it actually
2485 contained user code/data. For example, consider this fragment:
2487 const char * stubborn_problems[] = { "np" };
2489 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2492 .data.rel.local.stubborn_problems
2494 This then causes problems in arm32_arm_build_stubs() as it triggers:
2496 // Ignore non-stub sections.
2497 if (!strstr (stub_sec->name, STUB_SUFFIX))
2500 And so the section would be ignored instead of being processed. Hence
2501 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2503 #define STUB_SUFFIX ".__stub"
2505 /* One entry per long/short branch stub defined above. */
2507 DEF_STUB(long_branch_any_any) \
2508 DEF_STUB(long_branch_v4t_arm_thumb) \
2509 DEF_STUB(long_branch_thumb_only) \
2510 DEF_STUB(long_branch_v4t_thumb_thumb) \
2511 DEF_STUB(long_branch_v4t_thumb_arm) \
2512 DEF_STUB(short_branch_v4t_thumb_arm) \
2513 DEF_STUB(long_branch_any_arm_pic) \
2514 DEF_STUB(long_branch_any_thumb_pic) \
2515 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2516 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2517 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2518 DEF_STUB(long_branch_thumb_only_pic) \
2519 DEF_STUB(long_branch_any_tls_pic) \
2520 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2521 DEF_STUB(long_branch_arm_nacl) \
2522 DEF_STUB(long_branch_arm_nacl_pic) \
2523 DEF_STUB(a8_veneer_b_cond) \
2524 DEF_STUB(a8_veneer_b) \
2525 DEF_STUB(a8_veneer_bl) \
2526 DEF_STUB(a8_veneer_blx)
2528 #define DEF_STUB(x) arm_stub_##x,
2529 enum elf32_arm_stub_type
2533 /* Note the first a8_veneer type */
2534 arm_stub_a8_veneer_lwm
= arm_stub_a8_veneer_b_cond
2540 const insn_sequence
* template_sequence
;
2544 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2545 static const stub_def stub_definitions
[] =
2551 struct elf32_arm_stub_hash_entry
2553 /* Base hash table entry structure. */
2554 struct bfd_hash_entry root
;
2556 /* The stub section. */
2559 /* Offset within stub_sec of the beginning of this stub. */
2560 bfd_vma stub_offset
;
2562 /* Given the symbol's value and its section we can determine its final
2563 value when building the stubs (so the stub knows where to jump). */
2564 bfd_vma target_value
;
2565 asection
*target_section
;
2567 /* Offset to apply to relocation referencing target_value. */
2568 bfd_vma target_addend
;
2570 /* The instruction which caused this stub to be generated (only valid for
2571 Cortex-A8 erratum workaround stubs at present). */
2572 unsigned long orig_insn
;
2574 /* The stub type. */
2575 enum elf32_arm_stub_type stub_type
;
2576 /* Its encoding size in bytes. */
2579 const insn_sequence
*stub_template
;
2580 /* The size of the template (number of entries). */
2581 int stub_template_size
;
2583 /* The symbol table entry, if any, that this was derived from. */
2584 struct elf32_arm_link_hash_entry
*h
;
2586 /* Type of branch. */
2587 enum arm_st_branch_type branch_type
;
2589 /* Where this stub is being called from, or, in the case of combined
2590 stub sections, the first input section in the group. */
2593 /* The name for the local symbol at the start of this stub. The
2594 stub name in the hash table has to be unique; this does not, so
2595 it can be friendlier. */
2599 /* Used to build a map of a section. This is required for mixed-endian
2602 typedef struct elf32_elf_section_map
2607 elf32_arm_section_map
;
2609 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2613 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
,
2614 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
,
2615 VFP11_ERRATUM_ARM_VENEER
,
2616 VFP11_ERRATUM_THUMB_VENEER
2618 elf32_vfp11_erratum_type
;
2620 typedef struct elf32_vfp11_erratum_list
2622 struct elf32_vfp11_erratum_list
*next
;
2628 struct elf32_vfp11_erratum_list
*veneer
;
2629 unsigned int vfp_insn
;
2633 struct elf32_vfp11_erratum_list
*branch
;
2637 elf32_vfp11_erratum_type type
;
2639 elf32_vfp11_erratum_list
;
2644 INSERT_EXIDX_CANTUNWIND_AT_END
2646 arm_unwind_edit_type
;
2648 /* A (sorted) list of edits to apply to an unwind table. */
2649 typedef struct arm_unwind_table_edit
2651 arm_unwind_edit_type type
;
2652 /* Note: we sometimes want to insert an unwind entry corresponding to a
2653 section different from the one we're currently writing out, so record the
2654 (text) section this edit relates to here. */
2655 asection
*linked_section
;
2657 struct arm_unwind_table_edit
*next
;
2659 arm_unwind_table_edit
;
2661 typedef struct _arm_elf_section_data
2663 /* Information about mapping symbols. */
2664 struct bfd_elf_section_data elf
;
2665 unsigned int mapcount
;
2666 unsigned int mapsize
;
2667 elf32_arm_section_map
*map
;
2668 /* Information about CPU errata. */
2669 unsigned int erratumcount
;
2670 elf32_vfp11_erratum_list
*erratumlist
;
2671 /* Information about unwind tables. */
2674 /* Unwind info attached to a text section. */
2677 asection
*arm_exidx_sec
;
2680 /* Unwind info attached to an .ARM.exidx section. */
2683 arm_unwind_table_edit
*unwind_edit_list
;
2684 arm_unwind_table_edit
*unwind_edit_tail
;
2688 _arm_elf_section_data
;
2690 #define elf32_arm_section_data(sec) \
2691 ((_arm_elf_section_data *) elf_section_data (sec))
2693 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2694 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2695 so may be created multiple times: we use an array of these entries whilst
2696 relaxing which we can refresh easily, then create stubs for each potentially
2697 erratum-triggering instruction once we've settled on a solution. */
2699 struct a8_erratum_fix
2705 unsigned long orig_insn
;
2707 enum elf32_arm_stub_type stub_type
;
2708 enum arm_st_branch_type branch_type
;
2711 /* A table of relocs applied to branches which might trigger Cortex-A8
2714 struct a8_erratum_reloc
2717 bfd_vma destination
;
2718 struct elf32_arm_link_hash_entry
*hash
;
2719 const char *sym_name
;
2720 unsigned int r_type
;
2721 enum arm_st_branch_type branch_type
;
2722 bfd_boolean non_a8_stub
;
2725 /* The size of the thread control block. */
2728 /* ARM-specific information about a PLT entry, over and above the usual
2732 /* We reference count Thumb references to a PLT entry separately,
2733 so that we can emit the Thumb trampoline only if needed. */
2734 bfd_signed_vma thumb_refcount
;
2736 /* Some references from Thumb code may be eliminated by BL->BLX
2737 conversion, so record them separately. */
2738 bfd_signed_vma maybe_thumb_refcount
;
2740 /* How many of the recorded PLT accesses were from non-call relocations.
2741 This information is useful when deciding whether anything takes the
2742 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2743 non-call references to the function should resolve directly to the
2744 real runtime target. */
2745 unsigned int noncall_refcount
;
2747 /* Since PLT entries have variable size if the Thumb prologue is
2748 used, we need to record the index into .got.plt instead of
2749 recomputing it from the PLT offset. */
2750 bfd_signed_vma got_offset
;
2753 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2754 struct arm_local_iplt_info
2756 /* The information that is usually found in the generic ELF part of
2757 the hash table entry. */
2758 union gotplt_union root
;
2760 /* The information that is usually found in the ARM-specific part of
2761 the hash table entry. */
2762 struct arm_plt_info arm
;
2764 /* A list of all potential dynamic relocations against this symbol. */
2765 struct elf_dyn_relocs
*dyn_relocs
;
2768 struct elf_arm_obj_tdata
2770 struct elf_obj_tdata root
;
2772 /* tls_type for each local got entry. */
2773 char *local_got_tls_type
;
2775 /* GOTPLT entries for TLS descriptors. */
2776 bfd_vma
*local_tlsdesc_gotent
;
2778 /* Information for local symbols that need entries in .iplt. */
2779 struct arm_local_iplt_info
**local_iplt
;
2781 /* Zero to warn when linking objects with incompatible enum sizes. */
2782 int no_enum_size_warning
;
2784 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2785 int no_wchar_size_warning
;
2788 #define elf_arm_tdata(bfd) \
2789 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2791 #define elf32_arm_local_got_tls_type(bfd) \
2792 (elf_arm_tdata (bfd)->local_got_tls_type)
2794 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2795 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2797 #define elf32_arm_local_iplt(bfd) \
2798 (elf_arm_tdata (bfd)->local_iplt)
2800 #define is_arm_elf(bfd) \
2801 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2802 && elf_tdata (bfd) != NULL \
2803 && elf_object_id (bfd) == ARM_ELF_DATA)
2806 elf32_arm_mkobject (bfd
*abfd
)
2808 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2812 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2814 /* Arm ELF linker hash entry. */
2815 struct elf32_arm_link_hash_entry
2817 struct elf_link_hash_entry root
;
2819 /* Track dynamic relocs copied for this symbol. */
2820 struct elf_dyn_relocs
*dyn_relocs
;
2822 /* ARM-specific PLT information. */
2823 struct arm_plt_info plt
;
2825 #define GOT_UNKNOWN 0
2826 #define GOT_NORMAL 1
2827 #define GOT_TLS_GD 2
2828 #define GOT_TLS_IE 4
2829 #define GOT_TLS_GDESC 8
2830 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
2831 unsigned int tls_type
: 8;
2833 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
2834 unsigned int is_iplt
: 1;
2836 unsigned int unused
: 23;
2838 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
2839 starting at the end of the jump table. */
2840 bfd_vma tlsdesc_got
;
2842 /* The symbol marking the real symbol location for exported thumb
2843 symbols with Arm stubs. */
2844 struct elf_link_hash_entry
*export_glue
;
2846 /* A pointer to the most recently used stub hash entry against this
2848 struct elf32_arm_stub_hash_entry
*stub_cache
;
2851 /* Traverse an arm ELF linker hash table. */
2852 #define elf32_arm_link_hash_traverse(table, func, info) \
2853 (elf_link_hash_traverse \
2855 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2858 /* Get the ARM elf linker hash table from a link_info structure. */
2859 #define elf32_arm_hash_table(info) \
2860 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2861 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2863 #define arm_stub_hash_lookup(table, string, create, copy) \
2864 ((struct elf32_arm_stub_hash_entry *) \
2865 bfd_hash_lookup ((table), (string), (create), (copy)))
2867 /* Array to keep track of which stub sections have been created, and
2868 information on stub grouping. */
2871 /* This is the section to which stubs in the group will be
2874 /* The stub section. */
2878 #define elf32_arm_compute_jump_table_size(htab) \
2879 ((htab)->next_tls_desc_index * 4)
2881 /* ARM ELF linker hash table. */
2882 struct elf32_arm_link_hash_table
2884 /* The main hash table. */
2885 struct elf_link_hash_table root
;
2887 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2888 bfd_size_type thumb_glue_size
;
2890 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2891 bfd_size_type arm_glue_size
;
2893 /* The size in bytes of section containing the ARMv4 BX veneers. */
2894 bfd_size_type bx_glue_size
;
2896 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2897 veneer has been populated. */
2898 bfd_vma bx_glue_offset
[15];
2900 /* The size in bytes of the section containing glue for VFP11 erratum
2902 bfd_size_type vfp11_erratum_glue_size
;
2904 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
2905 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
2906 elf32_arm_write_section(). */
2907 struct a8_erratum_fix
*a8_erratum_fixes
;
2908 unsigned int num_a8_erratum_fixes
;
2910 /* An arbitrary input BFD chosen to hold the glue sections. */
2911 bfd
* bfd_of_glue_owner
;
2913 /* Nonzero to output a BE8 image. */
2916 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2917 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2920 /* The relocation to use for R_ARM_TARGET2 relocations. */
2923 /* 0 = Ignore R_ARM_V4BX.
2924 1 = Convert BX to MOV PC.
2925 2 = Generate v4 interworing stubs. */
2928 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
2931 /* Whether we should fix the ARM1176 BLX immediate issue. */
2934 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2937 /* What sort of code sequences we should look for which may trigger the
2938 VFP11 denorm erratum. */
2939 bfd_arm_vfp11_fix vfp11_fix
;
2941 /* Global counter for the number of fixes we have emitted. */
2942 int num_vfp11_fixes
;
2944 /* Nonzero to force PIC branch veneers. */
2947 /* The number of bytes in the initial entry in the PLT. */
2948 bfd_size_type plt_header_size
;
2950 /* The number of bytes in the subsequent PLT etries. */
2951 bfd_size_type plt_entry_size
;
2953 /* True if the target system is VxWorks. */
2956 /* True if the target system is Symbian OS. */
2959 /* True if the target system is Native Client. */
2962 /* True if the target uses REL relocations. */
2965 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
2966 bfd_vma next_tls_desc_index
;
2968 /* How many R_ARM_TLS_DESC relocations were generated so far. */
2969 bfd_vma num_tls_desc
;
2971 /* Short-cuts to get to dynamic linker sections. */
2975 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2978 /* The offset into splt of the PLT entry for the TLS descriptor
2979 resolver. Special values are 0, if not necessary (or not found
2980 to be necessary yet), and -1 if needed but not determined
2982 bfd_vma dt_tlsdesc_plt
;
2984 /* The offset into sgot of the GOT entry used by the PLT entry
2986 bfd_vma dt_tlsdesc_got
;
2988 /* Offset in .plt section of tls_arm_trampoline. */
2989 bfd_vma tls_trampoline
;
2991 /* Data for R_ARM_TLS_LDM32 relocations. */
2994 bfd_signed_vma refcount
;
2998 /* Small local sym cache. */
2999 struct sym_cache sym_cache
;
3001 /* For convenience in allocate_dynrelocs. */
3004 /* The amount of space used by the reserved portion of the sgotplt
3005 section, plus whatever space is used by the jump slots. */
3006 bfd_vma sgotplt_jump_table_size
;
3008 /* The stub hash table. */
3009 struct bfd_hash_table stub_hash_table
;
3011 /* Linker stub bfd. */
3014 /* Linker call-backs. */
3015 asection
* (*add_stub_section
) (const char *, asection
*, unsigned int);
3016 void (*layout_sections_again
) (void);
3018 /* Array to keep track of which stub sections have been created, and
3019 information on stub grouping. */
3020 struct map_stub
*stub_group
;
3022 /* Number of elements in stub_group. */
3025 /* Assorted information used by elf32_arm_size_stubs. */
3026 unsigned int bfd_count
;
3028 asection
**input_list
;
3031 /* Create an entry in an ARM ELF linker hash table. */
3033 static struct bfd_hash_entry
*
3034 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
3035 struct bfd_hash_table
* table
,
3036 const char * string
)
3038 struct elf32_arm_link_hash_entry
* ret
=
3039 (struct elf32_arm_link_hash_entry
*) entry
;
3041 /* Allocate the structure if it has not already been allocated by a
3044 ret
= (struct elf32_arm_link_hash_entry
*)
3045 bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
3047 return (struct bfd_hash_entry
*) ret
;
3049 /* Call the allocation method of the superclass. */
3050 ret
= ((struct elf32_arm_link_hash_entry
*)
3051 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
3055 ret
->dyn_relocs
= NULL
;
3056 ret
->tls_type
= GOT_UNKNOWN
;
3057 ret
->tlsdesc_got
= (bfd_vma
) -1;
3058 ret
->plt
.thumb_refcount
= 0;
3059 ret
->plt
.maybe_thumb_refcount
= 0;
3060 ret
->plt
.noncall_refcount
= 0;
3061 ret
->plt
.got_offset
= -1;
3062 ret
->is_iplt
= FALSE
;
3063 ret
->export_glue
= NULL
;
3065 ret
->stub_cache
= NULL
;
3068 return (struct bfd_hash_entry
*) ret
;
3071 /* Ensure that we have allocated bookkeeping structures for ABFD's local
3075 elf32_arm_allocate_local_sym_info (bfd
*abfd
)
3077 if (elf_local_got_refcounts (abfd
) == NULL
)
3079 bfd_size_type num_syms
;
3083 num_syms
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
3084 size
= num_syms
* (sizeof (bfd_signed_vma
)
3085 + sizeof (struct arm_local_iplt_info
*)
3088 data
= bfd_zalloc (abfd
, size
);
3092 elf_local_got_refcounts (abfd
) = (bfd_signed_vma
*) data
;
3093 data
+= num_syms
* sizeof (bfd_signed_vma
);
3095 elf32_arm_local_iplt (abfd
) = (struct arm_local_iplt_info
**) data
;
3096 data
+= num_syms
* sizeof (struct arm_local_iplt_info
*);
3098 elf32_arm_local_tlsdesc_gotent (abfd
) = (bfd_vma
*) data
;
3099 data
+= num_syms
* sizeof (bfd_vma
);
3101 elf32_arm_local_got_tls_type (abfd
) = data
;
3106 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
3107 to input bfd ABFD. Create the information if it doesn't already exist.
3108 Return null if an allocation fails. */
3110 static struct arm_local_iplt_info
*
3111 elf32_arm_create_local_iplt (bfd
*abfd
, unsigned long r_symndx
)
3113 struct arm_local_iplt_info
**ptr
;
3115 if (!elf32_arm_allocate_local_sym_info (abfd
))
3118 BFD_ASSERT (r_symndx
< elf_tdata (abfd
)->symtab_hdr
.sh_info
);
3119 ptr
= &elf32_arm_local_iplt (abfd
)[r_symndx
];
3121 *ptr
= bfd_zalloc (abfd
, sizeof (**ptr
));
3125 /* Try to obtain PLT information for the symbol with index R_SYMNDX
3126 in ABFD's symbol table. If the symbol is global, H points to its
3127 hash table entry, otherwise H is null.
3129 Return true if the symbol does have PLT information. When returning
3130 true, point *ROOT_PLT at the target-independent reference count/offset
3131 union and *ARM_PLT at the ARM-specific information. */
3134 elf32_arm_get_plt_info (bfd
*abfd
, struct elf32_arm_link_hash_entry
*h
,
3135 unsigned long r_symndx
, union gotplt_union
**root_plt
,
3136 struct arm_plt_info
**arm_plt
)
3138 struct arm_local_iplt_info
*local_iplt
;
3142 *root_plt
= &h
->root
.plt
;
3147 if (elf32_arm_local_iplt (abfd
) == NULL
)
3150 local_iplt
= elf32_arm_local_iplt (abfd
)[r_symndx
];
3151 if (local_iplt
== NULL
)
3154 *root_plt
= &local_iplt
->root
;
3155 *arm_plt
= &local_iplt
->arm
;
3159 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3163 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info
*info
,
3164 struct arm_plt_info
*arm_plt
)
3166 struct elf32_arm_link_hash_table
*htab
;
3168 htab
= elf32_arm_hash_table (info
);
3169 return (arm_plt
->thumb_refcount
!= 0
3170 || (!htab
->use_blx
&& arm_plt
->maybe_thumb_refcount
!= 0));
3173 /* Return a pointer to the head of the dynamic reloc list that should
3174 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3175 ABFD's symbol table. Return null if an error occurs. */
3177 static struct elf_dyn_relocs
**
3178 elf32_arm_get_local_dynreloc_list (bfd
*abfd
, unsigned long r_symndx
,
3179 Elf_Internal_Sym
*isym
)
3181 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3183 struct arm_local_iplt_info
*local_iplt
;
3185 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
3186 if (local_iplt
== NULL
)
3188 return &local_iplt
->dyn_relocs
;
3192 /* Track dynamic relocs needed for local syms too.
3193 We really need local syms available to do this
3198 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3202 vpp
= &elf_section_data (s
)->local_dynrel
;
3203 return (struct elf_dyn_relocs
**) vpp
;
3207 /* Initialize an entry in the stub hash table. */
3209 static struct bfd_hash_entry
*
3210 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
3211 struct bfd_hash_table
*table
,
3214 /* Allocate the structure if it has not already been allocated by a
3218 entry
= (struct bfd_hash_entry
*)
3219 bfd_hash_allocate (table
, sizeof (struct elf32_arm_stub_hash_entry
));
3224 /* Call the allocation method of the superclass. */
3225 entry
= bfd_hash_newfunc (entry
, table
, string
);
3228 struct elf32_arm_stub_hash_entry
*eh
;
3230 /* Initialize the local fields. */
3231 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
3232 eh
->stub_sec
= NULL
;
3233 eh
->stub_offset
= 0;
3234 eh
->target_value
= 0;
3235 eh
->target_section
= NULL
;
3236 eh
->target_addend
= 0;
3238 eh
->stub_type
= arm_stub_none
;
3240 eh
->stub_template
= NULL
;
3241 eh
->stub_template_size
= 0;
3244 eh
->output_name
= NULL
;
3250 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3251 shortcuts to them in our hash table. */
3254 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
3256 struct elf32_arm_link_hash_table
*htab
;
3258 htab
= elf32_arm_hash_table (info
);
3262 /* BPABI objects never have a GOT, or associated sections. */
3263 if (htab
->symbian_p
)
3266 if (! _bfd_elf_create_got_section (dynobj
, info
))
3272 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3275 create_ifunc_sections (struct bfd_link_info
*info
)
3277 struct elf32_arm_link_hash_table
*htab
;
3278 const struct elf_backend_data
*bed
;
3283 htab
= elf32_arm_hash_table (info
);
3284 dynobj
= htab
->root
.dynobj
;
3285 bed
= get_elf_backend_data (dynobj
);
3286 flags
= bed
->dynamic_sec_flags
;
3288 if (htab
->root
.iplt
== NULL
)
3290 s
= bfd_make_section_anyway_with_flags (dynobj
, ".iplt",
3291 flags
| SEC_READONLY
| SEC_CODE
);
3293 || !bfd_set_section_alignment (dynobj
, s
, bed
->plt_alignment
))
3295 htab
->root
.iplt
= s
;
3298 if (htab
->root
.irelplt
== NULL
)
3300 s
= bfd_make_section_anyway_with_flags (dynobj
,
3301 RELOC_SECTION (htab
, ".iplt"),
3302 flags
| SEC_READONLY
);
3304 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3306 htab
->root
.irelplt
= s
;
3309 if (htab
->root
.igotplt
== NULL
)
3311 s
= bfd_make_section_anyway_with_flags (dynobj
, ".igot.plt", flags
);
3313 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3315 htab
->root
.igotplt
= s
;
3320 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3321 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3325 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
3327 struct elf32_arm_link_hash_table
*htab
;
3329 htab
= elf32_arm_hash_table (info
);
3333 if (!htab
->root
.sgot
&& !create_got_section (dynobj
, info
))
3336 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
3339 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
3341 htab
->srelbss
= bfd_get_linker_section (dynobj
,
3342 RELOC_SECTION (htab
, ".bss"));
3344 if (htab
->vxworks_p
)
3346 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
3351 htab
->plt_header_size
= 0;
3352 htab
->plt_entry_size
3353 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
3357 htab
->plt_header_size
3358 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
3359 htab
->plt_entry_size
3360 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
3364 if (!htab
->root
.splt
3365 || !htab
->root
.srelplt
3367 || (!info
->shared
&& !htab
->srelbss
))
3373 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3376 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
3377 struct elf_link_hash_entry
*dir
,
3378 struct elf_link_hash_entry
*ind
)
3380 struct elf32_arm_link_hash_entry
*edir
, *eind
;
3382 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
3383 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
3385 if (eind
->dyn_relocs
!= NULL
)
3387 if (edir
->dyn_relocs
!= NULL
)
3389 struct elf_dyn_relocs
**pp
;
3390 struct elf_dyn_relocs
*p
;
3392 /* Add reloc counts against the indirect sym to the direct sym
3393 list. Merge any entries against the same section. */
3394 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
3396 struct elf_dyn_relocs
*q
;
3398 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
3399 if (q
->sec
== p
->sec
)
3401 q
->pc_count
+= p
->pc_count
;
3402 q
->count
+= p
->count
;
3409 *pp
= edir
->dyn_relocs
;
3412 edir
->dyn_relocs
= eind
->dyn_relocs
;
3413 eind
->dyn_relocs
= NULL
;
3416 if (ind
->root
.type
== bfd_link_hash_indirect
)
3418 /* Copy over PLT info. */
3419 edir
->plt
.thumb_refcount
+= eind
->plt
.thumb_refcount
;
3420 eind
->plt
.thumb_refcount
= 0;
3421 edir
->plt
.maybe_thumb_refcount
+= eind
->plt
.maybe_thumb_refcount
;
3422 eind
->plt
.maybe_thumb_refcount
= 0;
3423 edir
->plt
.noncall_refcount
+= eind
->plt
.noncall_refcount
;
3424 eind
->plt
.noncall_refcount
= 0;
3426 /* We should only allocate a function to .iplt once the final
3427 symbol information is known. */
3428 BFD_ASSERT (!eind
->is_iplt
);
3430 if (dir
->got
.refcount
<= 0)
3432 edir
->tls_type
= eind
->tls_type
;
3433 eind
->tls_type
= GOT_UNKNOWN
;
3437 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
3440 /* Create an ARM elf linker hash table. */
3442 static struct bfd_link_hash_table
*
3443 elf32_arm_link_hash_table_create (bfd
*abfd
)
3445 struct elf32_arm_link_hash_table
*ret
;
3446 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
3448 ret
= (struct elf32_arm_link_hash_table
*) bfd_zmalloc (amt
);
3452 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
3453 elf32_arm_link_hash_newfunc
,
3454 sizeof (struct elf32_arm_link_hash_entry
),
3461 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
3462 #ifdef FOUR_WORD_PLT
3463 ret
->plt_header_size
= 16;
3464 ret
->plt_entry_size
= 16;
3466 ret
->plt_header_size
= 20;
3467 ret
->plt_entry_size
= 12;
3472 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
3473 sizeof (struct elf32_arm_stub_hash_entry
)))
3479 return &ret
->root
.root
;
3482 /* Free the derived linker hash table. */
3485 elf32_arm_hash_table_free (struct bfd_link_hash_table
*hash
)
3487 struct elf32_arm_link_hash_table
*ret
3488 = (struct elf32_arm_link_hash_table
*) hash
;
3490 bfd_hash_table_free (&ret
->stub_hash_table
);
3491 _bfd_elf_link_hash_table_free (hash
);
3494 /* Determine if we're dealing with a Thumb only architecture. */
3497 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
3499 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3503 if (arch
== TAG_CPU_ARCH_V6_M
|| arch
== TAG_CPU_ARCH_V6S_M
)
3506 if (arch
!= TAG_CPU_ARCH_V7
&& arch
!= TAG_CPU_ARCH_V7E_M
)
3509 profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3510 Tag_CPU_arch_profile
);
3512 return profile
== 'M';
3515 /* Determine if we're dealing with a Thumb-2 object. */
3518 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
3520 int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3522 return arch
== TAG_CPU_ARCH_V6T2
|| arch
>= TAG_CPU_ARCH_V7
;
3525 /* Determine what kind of NOPs are available. */
3528 arch_has_arm_nop (struct elf32_arm_link_hash_table
*globals
)
3530 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3532 return arch
== TAG_CPU_ARCH_V6T2
3533 || arch
== TAG_CPU_ARCH_V6K
3534 || arch
== TAG_CPU_ARCH_V7
3535 || arch
== TAG_CPU_ARCH_V7E_M
;
3539 arch_has_thumb2_nop (struct elf32_arm_link_hash_table
*globals
)
3541 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3543 return (arch
== TAG_CPU_ARCH_V6T2
|| arch
== TAG_CPU_ARCH_V7
3544 || arch
== TAG_CPU_ARCH_V7E_M
);
3548 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
3552 case arm_stub_long_branch_thumb_only
:
3553 case arm_stub_long_branch_v4t_thumb_arm
:
3554 case arm_stub_short_branch_v4t_thumb_arm
:
3555 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3556 case arm_stub_long_branch_v4t_thumb_tls_pic
:
3557 case arm_stub_long_branch_thumb_only_pic
:
3568 /* Determine the type of stub needed, if any, for a call. */
3570 static enum elf32_arm_stub_type
3571 arm_type_of_stub (struct bfd_link_info
*info
,
3572 asection
*input_sec
,
3573 const Elf_Internal_Rela
*rel
,
3574 unsigned char st_type
,
3575 enum arm_st_branch_type
*actual_branch_type
,
3576 struct elf32_arm_link_hash_entry
*hash
,
3577 bfd_vma destination
,
3583 bfd_signed_vma branch_offset
;
3584 unsigned int r_type
;
3585 struct elf32_arm_link_hash_table
* globals
;
3588 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3590 enum arm_st_branch_type branch_type
= *actual_branch_type
;
3591 union gotplt_union
*root_plt
;
3592 struct arm_plt_info
*arm_plt
;
3594 if (branch_type
== ST_BRANCH_LONG
)
3597 globals
= elf32_arm_hash_table (info
);
3598 if (globals
== NULL
)
3601 thumb_only
= using_thumb_only (globals
);
3603 thumb2
= using_thumb2 (globals
);
3605 /* Determine where the call point is. */
3606 location
= (input_sec
->output_offset
3607 + input_sec
->output_section
->vma
3610 r_type
= ELF32_R_TYPE (rel
->r_info
);
3612 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
3613 are considering a function call relocation. */
3614 if (thumb_only
&& (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
3615 && branch_type
== ST_BRANCH_TO_ARM
)
3616 branch_type
= ST_BRANCH_TO_THUMB
;
3618 /* For TLS call relocs, it is the caller's responsibility to provide
3619 the address of the appropriate trampoline. */
3620 if (r_type
!= R_ARM_TLS_CALL
3621 && r_type
!= R_ARM_THM_TLS_CALL
3622 && elf32_arm_get_plt_info (input_bfd
, hash
, ELF32_R_SYM (rel
->r_info
),
3623 &root_plt
, &arm_plt
)
3624 && root_plt
->offset
!= (bfd_vma
) -1)
3628 if (hash
== NULL
|| hash
->is_iplt
)
3629 splt
= globals
->root
.iplt
;
3631 splt
= globals
->root
.splt
;
3636 /* Note when dealing with PLT entries: the main PLT stub is in
3637 ARM mode, so if the branch is in Thumb mode, another
3638 Thumb->ARM stub will be inserted later just before the ARM
3639 PLT stub. We don't take this extra distance into account
3640 here, because if a long branch stub is needed, we'll add a
3641 Thumb->Arm one and branch directly to the ARM PLT entry
3642 because it avoids spreading offset corrections in several
3645 destination
= (splt
->output_section
->vma
3646 + splt
->output_offset
3647 + root_plt
->offset
);
3649 branch_type
= ST_BRANCH_TO_ARM
;
3652 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3653 BFD_ASSERT (st_type
!= STT_GNU_IFUNC
);
3655 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3657 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
3658 || r_type
== R_ARM_THM_TLS_CALL
)
3660 /* Handle cases where:
3661 - this call goes too far (different Thumb/Thumb2 max
3663 - it's a Thumb->Arm call and blx is not available, or it's a
3664 Thumb->Arm branch (not bl). A stub is needed in this case,
3665 but only if this call is not through a PLT entry. Indeed,
3666 PLT stubs handle mode switching already.
3669 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3670 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3672 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3673 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3674 || (branch_type
== ST_BRANCH_TO_ARM
3675 && (((r_type
== R_ARM_THM_CALL
3676 || r_type
== R_ARM_THM_TLS_CALL
) && !globals
->use_blx
)
3677 || (r_type
== R_ARM_THM_JUMP24
))
3680 if (branch_type
== ST_BRANCH_TO_THUMB
)
3682 /* Thumb to thumb. */
3685 stub_type
= (info
->shared
| globals
->pic_veneer
)
3687 ? ((globals
->use_blx
3688 && (r_type
== R_ARM_THM_CALL
))
3689 /* V5T and above. Stub starts with ARM code, so
3690 we must be able to switch mode before
3691 reaching it, which is only possible for 'bl'
3692 (ie R_ARM_THM_CALL relocation). */
3693 ? arm_stub_long_branch_any_thumb_pic
3694 /* On V4T, use Thumb code only. */
3695 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
3697 /* non-PIC stubs. */
3698 : ((globals
->use_blx
3699 && (r_type
== R_ARM_THM_CALL
))
3700 /* V5T and above. */
3701 ? arm_stub_long_branch_any_any
3703 : arm_stub_long_branch_v4t_thumb_thumb
);
3707 stub_type
= (info
->shared
| globals
->pic_veneer
)
3709 ? arm_stub_long_branch_thumb_only_pic
3711 : arm_stub_long_branch_thumb_only
;
3718 && sym_sec
->owner
!= NULL
3719 && !INTERWORK_FLAG (sym_sec
->owner
))
3721 (*_bfd_error_handler
)
3722 (_("%B(%s): warning: interworking not enabled.\n"
3723 " first occurrence: %B: Thumb call to ARM"),
3724 sym_sec
->owner
, input_bfd
, name
);
3728 (info
->shared
| globals
->pic_veneer
)
3730 ? (r_type
== R_ARM_THM_TLS_CALL
3732 ? (globals
->use_blx
? arm_stub_long_branch_any_tls_pic
3733 : arm_stub_long_branch_v4t_thumb_tls_pic
)
3734 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
3735 /* V5T PIC and above. */
3736 ? arm_stub_long_branch_any_arm_pic
3738 : arm_stub_long_branch_v4t_thumb_arm_pic
))
3740 /* non-PIC stubs. */
3741 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
3742 /* V5T and above. */
3743 ? arm_stub_long_branch_any_any
3745 : arm_stub_long_branch_v4t_thumb_arm
);
3747 /* Handle v4t short branches. */
3748 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
3749 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
3750 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
3751 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
3755 else if (r_type
== R_ARM_CALL
3756 || r_type
== R_ARM_JUMP24
3757 || r_type
== R_ARM_PLT32
3758 || r_type
== R_ARM_TLS_CALL
)
3760 if (branch_type
== ST_BRANCH_TO_THUMB
)
3765 && sym_sec
->owner
!= NULL
3766 && !INTERWORK_FLAG (sym_sec
->owner
))
3768 (*_bfd_error_handler
)
3769 (_("%B(%s): warning: interworking not enabled.\n"
3770 " first occurrence: %B: ARM call to Thumb"),
3771 sym_sec
->owner
, input_bfd
, name
);
3774 /* We have an extra 2-bytes reach because of
3775 the mode change (bit 24 (H) of BLX encoding). */
3776 if (branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
3777 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
3778 || (r_type
== R_ARM_CALL
&& !globals
->use_blx
)
3779 || (r_type
== R_ARM_JUMP24
)
3780 || (r_type
== R_ARM_PLT32
))
3782 stub_type
= (info
->shared
| globals
->pic_veneer
)
3784 ? ((globals
->use_blx
)
3785 /* V5T and above. */
3786 ? arm_stub_long_branch_any_thumb_pic
3788 : arm_stub_long_branch_v4t_arm_thumb_pic
)
3790 /* non-PIC stubs. */
3791 : ((globals
->use_blx
)
3792 /* V5T and above. */
3793 ? arm_stub_long_branch_any_any
3795 : arm_stub_long_branch_v4t_arm_thumb
);
3801 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
3802 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
3805 (info
->shared
| globals
->pic_veneer
)
3807 ? (r_type
== R_ARM_TLS_CALL
3809 ? arm_stub_long_branch_any_tls_pic
3811 ? arm_stub_long_branch_arm_nacl_pic
3812 : arm_stub_long_branch_any_arm_pic
))
3813 /* non-PIC stubs. */
3815 ? arm_stub_long_branch_arm_nacl
3816 : arm_stub_long_branch_any_any
);
3821 /* If a stub is needed, record the actual destination type. */
3822 if (stub_type
!= arm_stub_none
)
3823 *actual_branch_type
= branch_type
;
3828 /* Build a name for an entry in the stub hash table. */
3831 elf32_arm_stub_name (const asection
*input_section
,
3832 const asection
*sym_sec
,
3833 const struct elf32_arm_link_hash_entry
*hash
,
3834 const Elf_Internal_Rela
*rel
,
3835 enum elf32_arm_stub_type stub_type
)
3842 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1 + 2 + 1;
3843 stub_name
= (char *) bfd_malloc (len
);
3844 if (stub_name
!= NULL
)
3845 sprintf (stub_name
, "%08x_%s+%x_%d",
3846 input_section
->id
& 0xffffffff,
3847 hash
->root
.root
.root
.string
,
3848 (int) rel
->r_addend
& 0xffffffff,
3853 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
3854 stub_name
= (char *) bfd_malloc (len
);
3855 if (stub_name
!= NULL
)
3856 sprintf (stub_name
, "%08x_%x:%x+%x_%d",
3857 input_section
->id
& 0xffffffff,
3858 sym_sec
->id
& 0xffffffff,
3859 ELF32_R_TYPE (rel
->r_info
) == R_ARM_TLS_CALL
3860 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_THM_TLS_CALL
3861 ? 0 : (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
3862 (int) rel
->r_addend
& 0xffffffff,
3869 /* Look up an entry in the stub hash. Stub entries are cached because
3870 creating the stub name takes a bit of time. */
3872 static struct elf32_arm_stub_hash_entry
*
3873 elf32_arm_get_stub_entry (const asection
*input_section
,
3874 const asection
*sym_sec
,
3875 struct elf_link_hash_entry
*hash
,
3876 const Elf_Internal_Rela
*rel
,
3877 struct elf32_arm_link_hash_table
*htab
,
3878 enum elf32_arm_stub_type stub_type
)
3880 struct elf32_arm_stub_hash_entry
*stub_entry
;
3881 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
3882 const asection
*id_sec
;
3884 if ((input_section
->flags
& SEC_CODE
) == 0)
3887 /* If this input section is part of a group of sections sharing one
3888 stub section, then use the id of the first section in the group.
3889 Stub names need to include a section id, as there may well be
3890 more than one stub used to reach say, printf, and we need to
3891 distinguish between them. */
3892 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
3894 if (h
!= NULL
&& h
->stub_cache
!= NULL
3895 && h
->stub_cache
->h
== h
3896 && h
->stub_cache
->id_sec
== id_sec
3897 && h
->stub_cache
->stub_type
== stub_type
)
3899 stub_entry
= h
->stub_cache
;
3905 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
, stub_type
);
3906 if (stub_name
== NULL
)
3909 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
3910 stub_name
, FALSE
, FALSE
);
3912 h
->stub_cache
= stub_entry
;
3920 /* Find or create a stub section. Returns a pointer to the stub section, and
3921 the section to which the stub section will be attached (in *LINK_SEC_P).
3922 LINK_SEC_P may be NULL. */
3925 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
3926 struct elf32_arm_link_hash_table
*htab
)
3931 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
3932 BFD_ASSERT (link_sec
!= NULL
);
3933 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
3935 if (stub_sec
== NULL
)
3937 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
3938 if (stub_sec
== NULL
)
3944 namelen
= strlen (link_sec
->name
);
3945 len
= namelen
+ sizeof (STUB_SUFFIX
);
3946 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
3950 memcpy (s_name
, link_sec
->name
, namelen
);
3951 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
3952 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
,
3953 htab
->nacl_p
? 4 : 3);
3954 if (stub_sec
== NULL
)
3956 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
3958 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
3962 *link_sec_p
= link_sec
;
3967 /* Add a new stub entry to the stub hash. Not all fields of the new
3968 stub entry are initialised. */
3970 static struct elf32_arm_stub_hash_entry
*
3971 elf32_arm_add_stub (const char *stub_name
,
3973 struct elf32_arm_link_hash_table
*htab
)
3977 struct elf32_arm_stub_hash_entry
*stub_entry
;
3979 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
);
3980 if (stub_sec
== NULL
)
3983 /* Enter this entry into the linker stub hash table. */
3984 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3986 if (stub_entry
== NULL
)
3988 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
3994 stub_entry
->stub_sec
= stub_sec
;
3995 stub_entry
->stub_offset
= 0;
3996 stub_entry
->id_sec
= link_sec
;
4001 /* Store an Arm insn into an output section not processed by
4002 elf32_arm_write_section. */
4005 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
4006 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
4008 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4009 bfd_putl32 (val
, ptr
);
4011 bfd_putb32 (val
, ptr
);
4014 /* Store a 16-bit Thumb insn into an output section not processed by
4015 elf32_arm_write_section. */
4018 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
4019 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
4021 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4022 bfd_putl16 (val
, ptr
);
4024 bfd_putb16 (val
, ptr
);
4027 /* If it's possible to change R_TYPE to a more efficient access
4028 model, return the new reloc type. */
4031 elf32_arm_tls_transition (struct bfd_link_info
*info
, int r_type
,
4032 struct elf_link_hash_entry
*h
)
4034 int is_local
= (h
== NULL
);
4036 if (info
->shared
|| (h
&& h
->root
.type
== bfd_link_hash_undefweak
))
4039 /* We do not support relaxations for Old TLS models. */
4042 case R_ARM_TLS_GOTDESC
:
4043 case R_ARM_TLS_CALL
:
4044 case R_ARM_THM_TLS_CALL
:
4045 case R_ARM_TLS_DESCSEQ
:
4046 case R_ARM_THM_TLS_DESCSEQ
:
4047 return is_local
? R_ARM_TLS_LE32
: R_ARM_TLS_IE32
;
4053 static bfd_reloc_status_type elf32_arm_final_link_relocate
4054 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
4055 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
4056 const char *, unsigned char, enum arm_st_branch_type
,
4057 struct elf_link_hash_entry
*, bfd_boolean
*, char **);
4060 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type
)
4064 case arm_stub_a8_veneer_b_cond
:
4065 case arm_stub_a8_veneer_b
:
4066 case arm_stub_a8_veneer_bl
:
4069 case arm_stub_long_branch_any_any
:
4070 case arm_stub_long_branch_v4t_arm_thumb
:
4071 case arm_stub_long_branch_thumb_only
:
4072 case arm_stub_long_branch_v4t_thumb_thumb
:
4073 case arm_stub_long_branch_v4t_thumb_arm
:
4074 case arm_stub_short_branch_v4t_thumb_arm
:
4075 case arm_stub_long_branch_any_arm_pic
:
4076 case arm_stub_long_branch_any_thumb_pic
:
4077 case arm_stub_long_branch_v4t_thumb_thumb_pic
:
4078 case arm_stub_long_branch_v4t_arm_thumb_pic
:
4079 case arm_stub_long_branch_v4t_thumb_arm_pic
:
4080 case arm_stub_long_branch_thumb_only_pic
:
4081 case arm_stub_long_branch_any_tls_pic
:
4082 case arm_stub_long_branch_v4t_thumb_tls_pic
:
4083 case arm_stub_a8_veneer_blx
:
4086 case arm_stub_long_branch_arm_nacl
:
4087 case arm_stub_long_branch_arm_nacl_pic
:
4091 abort (); /* Should be unreachable. */
4096 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
4100 struct elf32_arm_stub_hash_entry
*stub_entry
;
4101 struct elf32_arm_link_hash_table
*globals
;
4102 struct bfd_link_info
*info
;
4109 const insn_sequence
*template_sequence
;
4111 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
4112 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
4115 /* Massage our args to the form they really have. */
4116 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4117 info
= (struct bfd_link_info
*) in_arg
;
4119 globals
= elf32_arm_hash_table (info
);
4120 if (globals
== NULL
)
4123 stub_sec
= stub_entry
->stub_sec
;
4125 if ((globals
->fix_cortex_a8
< 0)
4126 != (arm_stub_required_alignment (stub_entry
->stub_type
) == 2))
4127 /* We have to do less-strictly-aligned fixes last. */
4130 /* Make a note of the offset within the stubs for this entry. */
4131 stub_entry
->stub_offset
= stub_sec
->size
;
4132 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
4134 stub_bfd
= stub_sec
->owner
;
4136 /* This is the address of the stub destination. */
4137 sym_value
= (stub_entry
->target_value
4138 + stub_entry
->target_section
->output_offset
4139 + stub_entry
->target_section
->output_section
->vma
);
4141 template_sequence
= stub_entry
->stub_template
;
4142 template_size
= stub_entry
->stub_template_size
;
4145 for (i
= 0; i
< template_size
; i
++)
4147 switch (template_sequence
[i
].type
)
4151 bfd_vma data
= (bfd_vma
) template_sequence
[i
].data
;
4152 if (template_sequence
[i
].reloc_addend
!= 0)
4154 /* We've borrowed the reloc_addend field to mean we should
4155 insert a condition code into this (Thumb-1 branch)
4156 instruction. See THUMB16_BCOND_INSN. */
4157 BFD_ASSERT ((data
& 0xff00) == 0xd000);
4158 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
4160 bfd_put_16 (stub_bfd
, data
, loc
+ size
);
4166 bfd_put_16 (stub_bfd
,
4167 (template_sequence
[i
].data
>> 16) & 0xffff,
4169 bfd_put_16 (stub_bfd
, template_sequence
[i
].data
& 0xffff,
4171 if (template_sequence
[i
].r_type
!= R_ARM_NONE
)
4173 stub_reloc_idx
[nrelocs
] = i
;
4174 stub_reloc_offset
[nrelocs
++] = size
;
4180 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
,
4182 /* Handle cases where the target is encoded within the
4184 if (template_sequence
[i
].r_type
== R_ARM_JUMP24
)
4186 stub_reloc_idx
[nrelocs
] = i
;
4187 stub_reloc_offset
[nrelocs
++] = size
;
4193 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
, loc
+ size
);
4194 stub_reloc_idx
[nrelocs
] = i
;
4195 stub_reloc_offset
[nrelocs
++] = size
;
4205 stub_sec
->size
+= size
;
4207 /* Stub size has already been computed in arm_size_one_stub. Check
4209 BFD_ASSERT (size
== stub_entry
->stub_size
);
4211 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4212 if (stub_entry
->branch_type
== ST_BRANCH_TO_THUMB
)
4215 /* Assume there is at least one and at most MAXRELOCS entries to relocate
4217 BFD_ASSERT (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
);
4219 for (i
= 0; i
< nrelocs
; i
++)
4220 if (template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP24
4221 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_JUMP19
4222 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_CALL
4223 || template_sequence
[stub_reloc_idx
[i
]].r_type
== R_ARM_THM_XPC22
)
4225 Elf_Internal_Rela rel
;
4226 bfd_boolean unresolved_reloc
;
4227 char *error_message
;
4228 enum arm_st_branch_type branch_type
4229 = (template_sequence
[stub_reloc_idx
[i
]].r_type
!= R_ARM_THM_XPC22
4230 ? ST_BRANCH_TO_THUMB
: ST_BRANCH_TO_ARM
);
4231 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
;
4233 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4234 rel
.r_info
= ELF32_R_INFO (0,
4235 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4236 rel
.r_addend
= template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4238 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
4239 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4240 template should refer back to the instruction after the original
4242 points_to
= sym_value
;
4244 /* There may be unintended consequences if this is not true. */
4245 BFD_ASSERT (stub_entry
->h
== NULL
);
4247 /* Note: _bfd_final_link_relocate doesn't handle these relocations
4248 properly. We should probably use this function unconditionally,
4249 rather than only for certain relocations listed in the enclosing
4250 conditional, for the sake of consistency. */
4251 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4252 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4253 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4254 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4255 branch_type
, (struct elf_link_hash_entry
*) stub_entry
->h
,
4256 &unresolved_reloc
, &error_message
);
4260 Elf_Internal_Rela rel
;
4261 bfd_boolean unresolved_reloc
;
4262 char *error_message
;
4263 bfd_vma points_to
= sym_value
+ stub_entry
->target_addend
4264 + template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4266 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4267 rel
.r_info
= ELF32_R_INFO (0,
4268 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4271 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4272 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4273 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4274 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4275 stub_entry
->branch_type
,
4276 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
4284 /* Calculate the template, template size and instruction size for a stub.
4285 Return value is the instruction size. */
4288 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
4289 const insn_sequence
**stub_template
,
4290 int *stub_template_size
)
4292 const insn_sequence
*template_sequence
= NULL
;
4293 int template_size
= 0, i
;
4296 template_sequence
= stub_definitions
[stub_type
].template_sequence
;
4298 *stub_template
= template_sequence
;
4300 template_size
= stub_definitions
[stub_type
].template_size
;
4301 if (stub_template_size
)
4302 *stub_template_size
= template_size
;
4305 for (i
= 0; i
< template_size
; i
++)
4307 switch (template_sequence
[i
].type
)
4328 /* As above, but don't actually build the stub. Just bump offset so
4329 we know stub section sizes. */
4332 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
4333 void *in_arg ATTRIBUTE_UNUSED
)
4335 struct elf32_arm_stub_hash_entry
*stub_entry
;
4336 const insn_sequence
*template_sequence
;
4337 int template_size
, size
;
4339 /* Massage our args to the form they really have. */
4340 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4342 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
4343 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
4345 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template_sequence
,
4348 stub_entry
->stub_size
= size
;
4349 stub_entry
->stub_template
= template_sequence
;
4350 stub_entry
->stub_template_size
= template_size
;
4352 size
= (size
+ 7) & ~7;
4353 stub_entry
->stub_sec
->size
+= size
;
4358 /* External entry points for sizing and building linker stubs. */
4360 /* Set up various things so that we can make a list of input sections
4361 for each output section included in the link. Returns -1 on error,
4362 0 when no stubs will be needed, and 1 on success. */
4365 elf32_arm_setup_section_lists (bfd
*output_bfd
,
4366 struct bfd_link_info
*info
)
4369 unsigned int bfd_count
;
4370 int top_id
, top_index
;
4372 asection
**input_list
, **list
;
4374 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4378 if (! is_elf_hash_table (htab
))
4381 /* Count the number of input BFDs and find the top input section id. */
4382 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
4384 input_bfd
= input_bfd
->link_next
)
4387 for (section
= input_bfd
->sections
;
4389 section
= section
->next
)
4391 if (top_id
< section
->id
)
4392 top_id
= section
->id
;
4395 htab
->bfd_count
= bfd_count
;
4397 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
4398 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
4399 if (htab
->stub_group
== NULL
)
4401 htab
->top_id
= top_id
;
4403 /* We can't use output_bfd->section_count here to find the top output
4404 section index as some sections may have been removed, and
4405 _bfd_strip_section_from_output doesn't renumber the indices. */
4406 for (section
= output_bfd
->sections
, top_index
= 0;
4408 section
= section
->next
)
4410 if (top_index
< section
->index
)
4411 top_index
= section
->index
;
4414 htab
->top_index
= top_index
;
4415 amt
= sizeof (asection
*) * (top_index
+ 1);
4416 input_list
= (asection
**) bfd_malloc (amt
);
4417 htab
->input_list
= input_list
;
4418 if (input_list
== NULL
)
4421 /* For sections we aren't interested in, mark their entries with a
4422 value we can check later. */
4423 list
= input_list
+ top_index
;
4425 *list
= bfd_abs_section_ptr
;
4426 while (list
-- != input_list
);
4428 for (section
= output_bfd
->sections
;
4430 section
= section
->next
)
4432 if ((section
->flags
& SEC_CODE
) != 0)
4433 input_list
[section
->index
] = NULL
;
4439 /* The linker repeatedly calls this function for each input section,
4440 in the order that input sections are linked into output sections.
4441 Build lists of input sections to determine groupings between which
4442 we may insert linker stubs. */
4445 elf32_arm_next_input_section (struct bfd_link_info
*info
,
4448 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4453 if (isec
->output_section
->index
<= htab
->top_index
)
4455 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
4457 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
4459 /* Steal the link_sec pointer for our list. */
4460 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4461 /* This happens to make the list in reverse order,
4462 which we reverse later. */
4463 PREV_SEC (isec
) = *list
;
4469 /* See whether we can group stub sections together. Grouping stub
4470 sections may result in fewer stubs. More importantly, we need to
4471 put all .init* and .fini* stubs at the end of the .init or
4472 .fini output sections respectively, because glibc splits the
4473 _init and _fini functions into multiple parts. Putting a stub in
4474 the middle of a function is not a good idea. */
4477 group_sections (struct elf32_arm_link_hash_table
*htab
,
4478 bfd_size_type stub_group_size
,
4479 bfd_boolean stubs_always_after_branch
)
4481 asection
**list
= htab
->input_list
;
4485 asection
*tail
= *list
;
4488 if (tail
== bfd_abs_section_ptr
)
4491 /* Reverse the list: we must avoid placing stubs at the
4492 beginning of the section because the beginning of the text
4493 section may be required for an interrupt vector in bare metal
4495 #define NEXT_SEC PREV_SEC
4497 while (tail
!= NULL
)
4499 /* Pop from tail. */
4500 asection
*item
= tail
;
4501 tail
= PREV_SEC (item
);
4504 NEXT_SEC (item
) = head
;
4508 while (head
!= NULL
)
4512 bfd_vma stub_group_start
= head
->output_offset
;
4513 bfd_vma end_of_next
;
4516 while (NEXT_SEC (curr
) != NULL
)
4518 next
= NEXT_SEC (curr
);
4519 end_of_next
= next
->output_offset
+ next
->size
;
4520 if (end_of_next
- stub_group_start
>= stub_group_size
)
4521 /* End of NEXT is too far from start, so stop. */
4523 /* Add NEXT to the group. */
4527 /* OK, the size from the start to the start of CURR is less
4528 than stub_group_size and thus can be handled by one stub
4529 section. (Or the head section is itself larger than
4530 stub_group_size, in which case we may be toast.)
4531 We should really be keeping track of the total size of
4532 stubs added here, as stubs contribute to the final output
4536 next
= NEXT_SEC (head
);
4537 /* Set up this stub group. */
4538 htab
->stub_group
[head
->id
].link_sec
= curr
;
4540 while (head
!= curr
&& (head
= next
) != NULL
);
4542 /* But wait, there's more! Input sections up to stub_group_size
4543 bytes after the stub section can be handled by it too. */
4544 if (!stubs_always_after_branch
)
4546 stub_group_start
= curr
->output_offset
+ curr
->size
;
4548 while (next
!= NULL
)
4550 end_of_next
= next
->output_offset
+ next
->size
;
4551 if (end_of_next
- stub_group_start
>= stub_group_size
)
4552 /* End of NEXT is too far from stubs, so stop. */
4554 /* Add NEXT to the stub group. */
4556 next
= NEXT_SEC (head
);
4557 htab
->stub_group
[head
->id
].link_sec
= curr
;
4563 while (list
++ != htab
->input_list
+ htab
->top_index
);
4565 free (htab
->input_list
);
4570 /* Comparison function for sorting/searching relocations relating to Cortex-A8
4574 a8_reloc_compare (const void *a
, const void *b
)
4576 const struct a8_erratum_reloc
*ra
= (const struct a8_erratum_reloc
*) a
;
4577 const struct a8_erratum_reloc
*rb
= (const struct a8_erratum_reloc
*) b
;
4579 if (ra
->from
< rb
->from
)
4581 else if (ra
->from
> rb
->from
)
4587 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
4588 const char *, char **);
4590 /* Helper function to scan code for sequences which might trigger the Cortex-A8
4591 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
4592 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
4596 cortex_a8_erratum_scan (bfd
*input_bfd
,
4597 struct bfd_link_info
*info
,
4598 struct a8_erratum_fix
**a8_fixes_p
,
4599 unsigned int *num_a8_fixes_p
,
4600 unsigned int *a8_fix_table_size_p
,
4601 struct a8_erratum_reloc
*a8_relocs
,
4602 unsigned int num_a8_relocs
,
4603 unsigned prev_num_a8_fixes
,
4604 bfd_boolean
*stub_changed_p
)
4607 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4608 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
4609 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
4610 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
4615 for (section
= input_bfd
->sections
;
4617 section
= section
->next
)
4619 bfd_byte
*contents
= NULL
;
4620 struct _arm_elf_section_data
*sec_data
;
4624 if (elf_section_type (section
) != SHT_PROGBITS
4625 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
4626 || (section
->flags
& SEC_EXCLUDE
) != 0
4627 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4628 || (section
->output_section
== bfd_abs_section_ptr
))
4631 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
4633 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
4634 contents
= elf_section_data (section
)->this_hdr
.contents
;
4635 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
4638 sec_data
= elf32_arm_section_data (section
);
4640 for (span
= 0; span
< sec_data
->mapcount
; span
++)
4642 unsigned int span_start
= sec_data
->map
[span
].vma
;
4643 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
4644 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
4646 char span_type
= sec_data
->map
[span
].type
;
4647 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
4649 if (span_type
!= 't')
4652 /* Span is entirely within a single 4KB region: skip scanning. */
4653 if (((base_vma
+ span_start
) & ~0xfff)
4654 == ((base_vma
+ span_end
) & ~0xfff))
4657 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4659 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4660 * The branch target is in the same 4KB region as the
4661 first half of the branch.
4662 * The instruction before the branch is a 32-bit
4663 length non-branch instruction. */
4664 for (i
= span_start
; i
< span_end
;)
4666 unsigned int insn
= bfd_getl16 (&contents
[i
]);
4667 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
4668 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
4670 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
4675 /* Load the rest of the insn (in manual-friendly order). */
4676 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
4678 /* Encoding T4: B<c>.W. */
4679 is_b
= (insn
& 0xf800d000) == 0xf0009000;
4680 /* Encoding T1: BL<c>.W. */
4681 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
4682 /* Encoding T2: BLX<c>.W. */
4683 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
4684 /* Encoding T3: B<c>.W (not permitted in IT block). */
4685 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
4686 && (insn
& 0x07f00000) != 0x03800000;
4689 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
4691 if (((base_vma
+ i
) & 0xfff) == 0xffe
4695 && ! last_was_branch
)
4697 bfd_signed_vma offset
= 0;
4698 bfd_boolean force_target_arm
= FALSE
;
4699 bfd_boolean force_target_thumb
= FALSE
;
4701 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
4702 struct a8_erratum_reloc key
, *found
;
4703 bfd_boolean use_plt
= FALSE
;
4705 key
.from
= base_vma
+ i
;
4706 found
= (struct a8_erratum_reloc
*)
4707 bsearch (&key
, a8_relocs
, num_a8_relocs
,
4708 sizeof (struct a8_erratum_reloc
),
4713 char *error_message
= NULL
;
4714 struct elf_link_hash_entry
*entry
;
4716 /* We don't care about the error returned from this
4717 function, only if there is glue or not. */
4718 entry
= find_thumb_glue (info
, found
->sym_name
,
4722 found
->non_a8_stub
= TRUE
;
4724 /* Keep a simpler condition, for the sake of clarity. */
4725 if (htab
->root
.splt
!= NULL
&& found
->hash
!= NULL
4726 && found
->hash
->root
.plt
.offset
!= (bfd_vma
) -1)
4729 if (found
->r_type
== R_ARM_THM_CALL
)
4731 if (found
->branch_type
== ST_BRANCH_TO_ARM
4733 force_target_arm
= TRUE
;
4735 force_target_thumb
= TRUE
;
4739 /* Check if we have an offending branch instruction. */
4741 if (found
&& found
->non_a8_stub
)
4742 /* We've already made a stub for this instruction, e.g.
4743 it's a long branch or a Thumb->ARM stub. Assume that
4744 stub will suffice to work around the A8 erratum (see
4745 setting of always_after_branch above). */
4749 offset
= (insn
& 0x7ff) << 1;
4750 offset
|= (insn
& 0x3f0000) >> 4;
4751 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
4752 offset
|= (insn
& 0x800) ? 0x80000 : 0;
4753 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
4754 if (offset
& 0x100000)
4755 offset
|= ~ ((bfd_signed_vma
) 0xfffff);
4756 stub_type
= arm_stub_a8_veneer_b_cond
;
4758 else if (is_b
|| is_bl
|| is_blx
)
4760 int s
= (insn
& 0x4000000) != 0;
4761 int j1
= (insn
& 0x2000) != 0;
4762 int j2
= (insn
& 0x800) != 0;
4766 offset
= (insn
& 0x7ff) << 1;
4767 offset
|= (insn
& 0x3ff0000) >> 4;
4771 if (offset
& 0x1000000)
4772 offset
|= ~ ((bfd_signed_vma
) 0xffffff);
4775 offset
&= ~ ((bfd_signed_vma
) 3);
4777 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
4778 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
4781 if (stub_type
!= arm_stub_none
)
4783 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
4785 /* The original instruction is a BL, but the target is
4786 an ARM instruction. If we were not making a stub,
4787 the BL would have been converted to a BLX. Use the
4788 BLX stub instead in that case. */
4789 if (htab
->use_blx
&& force_target_arm
4790 && stub_type
== arm_stub_a8_veneer_bl
)
4792 stub_type
= arm_stub_a8_veneer_blx
;
4796 /* Conversely, if the original instruction was
4797 BLX but the target is Thumb mode, use the BL
4799 else if (force_target_thumb
4800 && stub_type
== arm_stub_a8_veneer_blx
)
4802 stub_type
= arm_stub_a8_veneer_bl
;
4808 pc_for_insn
&= ~ ((bfd_vma
) 3);
4810 /* If we found a relocation, use the proper destination,
4811 not the offset in the (unrelocated) instruction.
4812 Note this is always done if we switched the stub type
4816 (bfd_signed_vma
) (found
->destination
- pc_for_insn
);
4818 /* If the stub will use a Thumb-mode branch to a
4819 PLT target, redirect it to the preceding Thumb
4821 if (stub_type
!= arm_stub_a8_veneer_blx
&& use_plt
)
4822 offset
-= PLT_THUMB_STUB_SIZE
;
4824 target
= pc_for_insn
+ offset
;
4826 /* The BLX stub is ARM-mode code. Adjust the offset to
4827 take the different PC value (+8 instead of +4) into
4829 if (stub_type
== arm_stub_a8_veneer_blx
)
4832 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
4834 char *stub_name
= NULL
;
4836 if (num_a8_fixes
== a8_fix_table_size
)
4838 a8_fix_table_size
*= 2;
4839 a8_fixes
= (struct a8_erratum_fix
*)
4840 bfd_realloc (a8_fixes
,
4841 sizeof (struct a8_erratum_fix
)
4842 * a8_fix_table_size
);
4845 if (num_a8_fixes
< prev_num_a8_fixes
)
4847 /* If we're doing a subsequent scan,
4848 check if we've found the same fix as
4849 before, and try and reuse the stub
4851 stub_name
= a8_fixes
[num_a8_fixes
].stub_name
;
4852 if ((a8_fixes
[num_a8_fixes
].section
!= section
)
4853 || (a8_fixes
[num_a8_fixes
].offset
!= i
))
4857 *stub_changed_p
= TRUE
;
4863 stub_name
= (char *) bfd_malloc (8 + 1 + 8 + 1);
4864 if (stub_name
!= NULL
)
4865 sprintf (stub_name
, "%x:%x", section
->id
, i
);
4868 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
4869 a8_fixes
[num_a8_fixes
].section
= section
;
4870 a8_fixes
[num_a8_fixes
].offset
= i
;
4871 a8_fixes
[num_a8_fixes
].addend
= offset
;
4872 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
4873 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
4874 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
4875 a8_fixes
[num_a8_fixes
].branch_type
=
4876 is_blx
? ST_BRANCH_TO_ARM
: ST_BRANCH_TO_THUMB
;
4883 i
+= insn_32bit
? 4 : 2;
4884 last_was_32bit
= insn_32bit
;
4885 last_was_branch
= is_32bit_branch
;
4889 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
4893 *a8_fixes_p
= a8_fixes
;
4894 *num_a8_fixes_p
= num_a8_fixes
;
4895 *a8_fix_table_size_p
= a8_fix_table_size
;
4900 /* Determine and set the size of the stub section for a final link.
4902 The basic idea here is to examine all the relocations looking for
4903 PC-relative calls to a target that is unreachable with a "bl"
4907 elf32_arm_size_stubs (bfd
*output_bfd
,
4909 struct bfd_link_info
*info
,
4910 bfd_signed_vma group_size
,
4911 asection
* (*add_stub_section
) (const char *, asection
*,
4913 void (*layout_sections_again
) (void))
4915 bfd_size_type stub_group_size
;
4916 bfd_boolean stubs_always_after_branch
;
4917 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4918 struct a8_erratum_fix
*a8_fixes
= NULL
;
4919 unsigned int num_a8_fixes
= 0, a8_fix_table_size
= 10;
4920 struct a8_erratum_reloc
*a8_relocs
= NULL
;
4921 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
4926 if (htab
->fix_cortex_a8
)
4928 a8_fixes
= (struct a8_erratum_fix
*)
4929 bfd_zmalloc (sizeof (struct a8_erratum_fix
) * a8_fix_table_size
);
4930 a8_relocs
= (struct a8_erratum_reloc
*)
4931 bfd_zmalloc (sizeof (struct a8_erratum_reloc
) * a8_reloc_table_size
);
4934 /* Propagate mach to stub bfd, because it may not have been
4935 finalized when we created stub_bfd. */
4936 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4937 bfd_get_mach (output_bfd
));
4939 /* Stash our params away. */
4940 htab
->stub_bfd
= stub_bfd
;
4941 htab
->add_stub_section
= add_stub_section
;
4942 htab
->layout_sections_again
= layout_sections_again
;
4943 stubs_always_after_branch
= group_size
< 0;
4945 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
4946 as the first half of a 32-bit branch straddling two 4K pages. This is a
4947 crude way of enforcing that. */
4948 if (htab
->fix_cortex_a8
)
4949 stubs_always_after_branch
= 1;
4952 stub_group_size
= -group_size
;
4954 stub_group_size
= group_size
;
4956 if (stub_group_size
== 1)
4958 /* Default values. */
4959 /* Thumb branch range is +-4MB has to be used as the default
4960 maximum size (a given section can contain both ARM and Thumb
4961 code, so the worst case has to be taken into account).
4963 This value is 24K less than that, which allows for 2025
4964 12-byte stubs. If we exceed that, then we will fail to link.
4965 The user will have to relink with an explicit group size
4967 stub_group_size
= 4170000;
4970 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
4972 /* If we're applying the cortex A8 fix, we need to determine the
4973 program header size now, because we cannot change it later --
4974 that could alter section placements. Notice the A8 erratum fix
4975 ends up requiring the section addresses to remain unchanged
4976 modulo the page size. That's something we cannot represent
4977 inside BFD, and we don't want to force the section alignment to
4978 be the page size. */
4979 if (htab
->fix_cortex_a8
)
4980 (*htab
->layout_sections_again
) ();
4985 unsigned int bfd_indx
;
4987 bfd_boolean stub_changed
= FALSE
;
4988 unsigned prev_num_a8_fixes
= num_a8_fixes
;
4991 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4993 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4995 Elf_Internal_Shdr
*symtab_hdr
;
4997 Elf_Internal_Sym
*local_syms
= NULL
;
4999 if (!is_arm_elf (input_bfd
))
5004 /* We'll need the symbol table in a second. */
5005 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
5006 if (symtab_hdr
->sh_info
== 0)
5009 /* Walk over each section attached to the input bfd. */
5010 for (section
= input_bfd
->sections
;
5012 section
= section
->next
)
5014 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
5016 /* If there aren't any relocs, then there's nothing more
5018 if ((section
->flags
& SEC_RELOC
) == 0
5019 || section
->reloc_count
== 0
5020 || (section
->flags
& SEC_CODE
) == 0)
5023 /* If this section is a link-once section that will be
5024 discarded, then don't create any stubs. */
5025 if (section
->output_section
== NULL
5026 || section
->output_section
->owner
!= output_bfd
)
5029 /* Get the relocs. */
5031 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
5032 NULL
, info
->keep_memory
);
5033 if (internal_relocs
== NULL
)
5034 goto error_ret_free_local
;
5036 /* Now examine each relocation. */
5037 irela
= internal_relocs
;
5038 irelaend
= irela
+ section
->reloc_count
;
5039 for (; irela
< irelaend
; irela
++)
5041 unsigned int r_type
, r_indx
;
5042 enum elf32_arm_stub_type stub_type
;
5043 struct elf32_arm_stub_hash_entry
*stub_entry
;
5046 bfd_vma destination
;
5047 struct elf32_arm_link_hash_entry
*hash
;
5048 const char *sym_name
;
5050 const asection
*id_sec
;
5051 unsigned char st_type
;
5052 enum arm_st_branch_type branch_type
;
5053 bfd_boolean created_stub
= FALSE
;
5055 r_type
= ELF32_R_TYPE (irela
->r_info
);
5056 r_indx
= ELF32_R_SYM (irela
->r_info
);
5058 if (r_type
>= (unsigned int) R_ARM_max
)
5060 bfd_set_error (bfd_error_bad_value
);
5061 error_ret_free_internal
:
5062 if (elf_section_data (section
)->relocs
== NULL
)
5063 free (internal_relocs
);
5064 goto error_ret_free_local
;
5068 if (r_indx
>= symtab_hdr
->sh_info
)
5069 hash
= elf32_arm_hash_entry
5070 (elf_sym_hashes (input_bfd
)
5071 [r_indx
- symtab_hdr
->sh_info
]);
5073 /* Only look for stubs on branch instructions, or
5074 non-relaxed TLSCALL */
5075 if ((r_type
!= (unsigned int) R_ARM_CALL
)
5076 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
5077 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
5078 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
5079 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
5080 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
5081 && (r_type
!= (unsigned int) R_ARM_PLT32
)
5082 && !((r_type
== (unsigned int) R_ARM_TLS_CALL
5083 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
5084 && r_type
== elf32_arm_tls_transition
5085 (info
, r_type
, &hash
->root
)
5086 && ((hash
? hash
->tls_type
5087 : (elf32_arm_local_got_tls_type
5088 (input_bfd
)[r_indx
]))
5089 & GOT_TLS_GDESC
) != 0))
5092 /* Now determine the call target, its name, value,
5099 if (r_type
== (unsigned int) R_ARM_TLS_CALL
5100 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
5102 /* A non-relaxed TLS call. The target is the
5103 plt-resident trampoline and nothing to do
5105 BFD_ASSERT (htab
->tls_trampoline
> 0);
5106 sym_sec
= htab
->root
.splt
;
5107 sym_value
= htab
->tls_trampoline
;
5110 branch_type
= ST_BRANCH_TO_ARM
;
5114 /* It's a local symbol. */
5115 Elf_Internal_Sym
*sym
;
5117 if (local_syms
== NULL
)
5120 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5121 if (local_syms
== NULL
)
5123 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
5124 symtab_hdr
->sh_info
, 0,
5126 if (local_syms
== NULL
)
5127 goto error_ret_free_internal
;
5130 sym
= local_syms
+ r_indx
;
5131 if (sym
->st_shndx
== SHN_UNDEF
)
5132 sym_sec
= bfd_und_section_ptr
;
5133 else if (sym
->st_shndx
== SHN_ABS
)
5134 sym_sec
= bfd_abs_section_ptr
;
5135 else if (sym
->st_shndx
== SHN_COMMON
)
5136 sym_sec
= bfd_com_section_ptr
;
5139 bfd_section_from_elf_index (input_bfd
, sym
->st_shndx
);
5142 /* This is an undefined symbol. It can never
5146 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
5147 sym_value
= sym
->st_value
;
5148 destination
= (sym_value
+ irela
->r_addend
5149 + sym_sec
->output_offset
5150 + sym_sec
->output_section
->vma
);
5151 st_type
= ELF_ST_TYPE (sym
->st_info
);
5152 branch_type
= ARM_SYM_BRANCH_TYPE (sym
);
5154 = bfd_elf_string_from_elf_section (input_bfd
,
5155 symtab_hdr
->sh_link
,
5160 /* It's an external symbol. */
5161 while (hash
->root
.root
.type
== bfd_link_hash_indirect
5162 || hash
->root
.root
.type
== bfd_link_hash_warning
)
5163 hash
= ((struct elf32_arm_link_hash_entry
*)
5164 hash
->root
.root
.u
.i
.link
);
5166 if (hash
->root
.root
.type
== bfd_link_hash_defined
5167 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
5169 sym_sec
= hash
->root
.root
.u
.def
.section
;
5170 sym_value
= hash
->root
.root
.u
.def
.value
;
5172 struct elf32_arm_link_hash_table
*globals
=
5173 elf32_arm_hash_table (info
);
5175 /* For a destination in a shared library,
5176 use the PLT stub as target address to
5177 decide whether a branch stub is
5180 && globals
->root
.splt
!= NULL
5182 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5184 sym_sec
= globals
->root
.splt
;
5185 sym_value
= hash
->root
.plt
.offset
;
5186 if (sym_sec
->output_section
!= NULL
)
5187 destination
= (sym_value
5188 + sym_sec
->output_offset
5189 + sym_sec
->output_section
->vma
);
5191 else if (sym_sec
->output_section
!= NULL
)
5192 destination
= (sym_value
+ irela
->r_addend
5193 + sym_sec
->output_offset
5194 + sym_sec
->output_section
->vma
);
5196 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
5197 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
5199 /* For a shared library, use the PLT stub as
5200 target address to decide whether a long
5201 branch stub is needed.
5202 For absolute code, they cannot be handled. */
5203 struct elf32_arm_link_hash_table
*globals
=
5204 elf32_arm_hash_table (info
);
5207 && globals
->root
.splt
!= NULL
5209 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5211 sym_sec
= globals
->root
.splt
;
5212 sym_value
= hash
->root
.plt
.offset
;
5213 if (sym_sec
->output_section
!= NULL
)
5214 destination
= (sym_value
5215 + sym_sec
->output_offset
5216 + sym_sec
->output_section
->vma
);
5223 bfd_set_error (bfd_error_bad_value
);
5224 goto error_ret_free_internal
;
5226 st_type
= hash
->root
.type
;
5227 branch_type
= hash
->root
.target_internal
;
5228 sym_name
= hash
->root
.root
.root
.string
;
5233 /* Determine what (if any) linker stub is needed. */
5234 stub_type
= arm_type_of_stub (info
, section
, irela
,
5235 st_type
, &branch_type
,
5236 hash
, destination
, sym_sec
,
5237 input_bfd
, sym_name
);
5238 if (stub_type
== arm_stub_none
)
5241 /* Support for grouping stub sections. */
5242 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
5244 /* Get the name of this stub. */
5245 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
,
5248 goto error_ret_free_internal
;
5250 /* We've either created a stub for this reloc already,
5251 or we are about to. */
5252 created_stub
= TRUE
;
5254 stub_entry
= arm_stub_hash_lookup
5255 (&htab
->stub_hash_table
, stub_name
,
5257 if (stub_entry
!= NULL
)
5259 /* The proper stub has already been created. */
5261 stub_entry
->target_value
= sym_value
;
5265 stub_entry
= elf32_arm_add_stub (stub_name
, section
,
5267 if (stub_entry
== NULL
)
5270 goto error_ret_free_internal
;
5273 stub_entry
->target_value
= sym_value
;
5274 stub_entry
->target_section
= sym_sec
;
5275 stub_entry
->stub_type
= stub_type
;
5276 stub_entry
->h
= hash
;
5277 stub_entry
->branch_type
= branch_type
;
5279 if (sym_name
== NULL
)
5280 sym_name
= "unnamed";
5281 stub_entry
->output_name
= (char *)
5282 bfd_alloc (htab
->stub_bfd
,
5283 sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
5284 + strlen (sym_name
));
5285 if (stub_entry
->output_name
== NULL
)
5288 goto error_ret_free_internal
;
5291 /* For historical reasons, use the existing names for
5292 ARM-to-Thumb and Thumb-to-ARM stubs. */
5293 if ((r_type
== (unsigned int) R_ARM_THM_CALL
5294 || r_type
== (unsigned int) R_ARM_THM_JUMP24
)
5295 && branch_type
== ST_BRANCH_TO_ARM
)
5296 sprintf (stub_entry
->output_name
,
5297 THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
5298 else if ((r_type
== (unsigned int) R_ARM_CALL
5299 || r_type
== (unsigned int) R_ARM_JUMP24
)
5300 && branch_type
== ST_BRANCH_TO_THUMB
)
5301 sprintf (stub_entry
->output_name
,
5302 ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
5304 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
,
5307 stub_changed
= TRUE
;
5311 /* Look for relocations which might trigger Cortex-A8
5313 if (htab
->fix_cortex_a8
5314 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
5315 || r_type
== (unsigned int) R_ARM_THM_JUMP19
5316 || r_type
== (unsigned int) R_ARM_THM_CALL
5317 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
5319 bfd_vma from
= section
->output_section
->vma
5320 + section
->output_offset
5323 if ((from
& 0xfff) == 0xffe)
5325 /* Found a candidate. Note we haven't checked the
5326 destination is within 4K here: if we do so (and
5327 don't create an entry in a8_relocs) we can't tell
5328 that a branch should have been relocated when
5330 if (num_a8_relocs
== a8_reloc_table_size
)
5332 a8_reloc_table_size
*= 2;
5333 a8_relocs
= (struct a8_erratum_reloc
*)
5334 bfd_realloc (a8_relocs
,
5335 sizeof (struct a8_erratum_reloc
)
5336 * a8_reloc_table_size
);
5339 a8_relocs
[num_a8_relocs
].from
= from
;
5340 a8_relocs
[num_a8_relocs
].destination
= destination
;
5341 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
5342 a8_relocs
[num_a8_relocs
].branch_type
= branch_type
;
5343 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
5344 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
5345 a8_relocs
[num_a8_relocs
].hash
= hash
;
5352 /* We're done with the internal relocs, free them. */
5353 if (elf_section_data (section
)->relocs
== NULL
)
5354 free (internal_relocs
);
5357 if (htab
->fix_cortex_a8
)
5359 /* Sort relocs which might apply to Cortex-A8 erratum. */
5360 qsort (a8_relocs
, num_a8_relocs
,
5361 sizeof (struct a8_erratum_reloc
),
5364 /* Scan for branches which might trigger Cortex-A8 erratum. */
5365 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
5366 &num_a8_fixes
, &a8_fix_table_size
,
5367 a8_relocs
, num_a8_relocs
,
5368 prev_num_a8_fixes
, &stub_changed
)
5370 goto error_ret_free_local
;
5374 if (prev_num_a8_fixes
!= num_a8_fixes
)
5375 stub_changed
= TRUE
;
5380 /* OK, we've added some stubs. Find out the new size of the
5382 for (stub_sec
= htab
->stub_bfd
->sections
;
5384 stub_sec
= stub_sec
->next
)
5386 /* Ignore non-stub sections. */
5387 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
5393 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
5395 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
5396 if (htab
->fix_cortex_a8
)
5397 for (i
= 0; i
< num_a8_fixes
; i
++)
5399 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
5400 a8_fixes
[i
].section
, htab
);
5402 if (stub_sec
== NULL
)
5403 goto error_ret_free_local
;
5406 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
5411 /* Ask the linker to do its stuff. */
5412 (*htab
->layout_sections_again
) ();
5415 /* Add stubs for Cortex-A8 erratum fixes now. */
5416 if (htab
->fix_cortex_a8
)
5418 for (i
= 0; i
< num_a8_fixes
; i
++)
5420 struct elf32_arm_stub_hash_entry
*stub_entry
;
5421 char *stub_name
= a8_fixes
[i
].stub_name
;
5422 asection
*section
= a8_fixes
[i
].section
;
5423 unsigned int section_id
= a8_fixes
[i
].section
->id
;
5424 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
5425 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
5426 const insn_sequence
*template_sequence
;
5427 int template_size
, size
= 0;
5429 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
5431 if (stub_entry
== NULL
)
5433 (*_bfd_error_handler
) (_("%s: cannot create stub entry %s"),
5439 stub_entry
->stub_sec
= stub_sec
;
5440 stub_entry
->stub_offset
= 0;
5441 stub_entry
->id_sec
= link_sec
;
5442 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
5443 stub_entry
->target_section
= a8_fixes
[i
].section
;
5444 stub_entry
->target_value
= a8_fixes
[i
].offset
;
5445 stub_entry
->target_addend
= a8_fixes
[i
].addend
;
5446 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
5447 stub_entry
->branch_type
= a8_fixes
[i
].branch_type
;
5449 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
,
5453 stub_entry
->stub_size
= size
;
5454 stub_entry
->stub_template
= template_sequence
;
5455 stub_entry
->stub_template_size
= template_size
;
5458 /* Stash the Cortex-A8 erratum fix array for use later in
5459 elf32_arm_write_section(). */
5460 htab
->a8_erratum_fixes
= a8_fixes
;
5461 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
5465 htab
->a8_erratum_fixes
= NULL
;
5466 htab
->num_a8_erratum_fixes
= 0;
5470 error_ret_free_local
:
5474 /* Build all the stubs associated with the current output file. The
5475 stubs are kept in a hash table attached to the main linker hash
5476 table. We also set up the .plt entries for statically linked PIC
5477 functions here. This function is called via arm_elf_finish in the
5481 elf32_arm_build_stubs (struct bfd_link_info
*info
)
5484 struct bfd_hash_table
*table
;
5485 struct elf32_arm_link_hash_table
*htab
;
5487 htab
= elf32_arm_hash_table (info
);
5491 for (stub_sec
= htab
->stub_bfd
->sections
;
5493 stub_sec
= stub_sec
->next
)
5497 /* Ignore non-stub sections. */
5498 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
5501 /* Allocate memory to hold the linker stubs. */
5502 size
= stub_sec
->size
;
5503 stub_sec
->contents
= (unsigned char *) bfd_zalloc (htab
->stub_bfd
, size
);
5504 if (stub_sec
->contents
== NULL
&& size
!= 0)
5509 /* Build the stubs as directed by the stub hash table. */
5510 table
= &htab
->stub_hash_table
;
5511 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
5512 if (htab
->fix_cortex_a8
)
5514 /* Place the cortex a8 stubs last. */
5515 htab
->fix_cortex_a8
= -1;
5516 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
5522 /* Locate the Thumb encoded calling stub for NAME. */
5524 static struct elf_link_hash_entry
*
5525 find_thumb_glue (struct bfd_link_info
*link_info
,
5527 char **error_message
)
5530 struct elf_link_hash_entry
*hash
;
5531 struct elf32_arm_link_hash_table
*hash_table
;
5533 /* We need a pointer to the armelf specific hash table. */
5534 hash_table
= elf32_arm_hash_table (link_info
);
5535 if (hash_table
== NULL
)
5538 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5539 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
5541 BFD_ASSERT (tmp_name
);
5543 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
5545 hash
= elf_link_hash_lookup
5546 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5549 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
5550 tmp_name
, name
) == -1)
5551 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
5558 /* Locate the ARM encoded calling stub for NAME. */
5560 static struct elf_link_hash_entry
*
5561 find_arm_glue (struct bfd_link_info
*link_info
,
5563 char **error_message
)
5566 struct elf_link_hash_entry
*myh
;
5567 struct elf32_arm_link_hash_table
*hash_table
;
5569 /* We need a pointer to the elfarm specific hash table. */
5570 hash_table
= elf32_arm_hash_table (link_info
);
5571 if (hash_table
== NULL
)
5574 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5575 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5577 BFD_ASSERT (tmp_name
);
5579 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5581 myh
= elf_link_hash_lookup
5582 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5585 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
5586 tmp_name
, name
) == -1)
5587 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
5594 /* ARM->Thumb glue (static images):
5598 ldr r12, __func_addr
5601 .word func @ behave as if you saw a ARM_32 reloc.
5608 .word func @ behave as if you saw a ARM_32 reloc.
5610 (relocatable images)
5613 ldr r12, __func_offset
5619 #define ARM2THUMB_STATIC_GLUE_SIZE 12
5620 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
5621 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
5622 static const insn32 a2t3_func_addr_insn
= 0x00000001;
5624 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
5625 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
5626 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
5628 #define ARM2THUMB_PIC_GLUE_SIZE 16
5629 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
5630 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
5631 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
5633 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
5637 __func_from_thumb: __func_from_thumb:
5639 nop ldr r6, __func_addr
5649 #define THUMB2ARM_GLUE_SIZE 8
5650 static const insn16 t2a1_bx_pc_insn
= 0x4778;
5651 static const insn16 t2a2_noop_insn
= 0x46c0;
5652 static const insn32 t2a3_b_insn
= 0xea000000;
5654 #define VFP11_ERRATUM_VENEER_SIZE 8
5656 #define ARM_BX_VENEER_SIZE 12
5657 static const insn32 armbx1_tst_insn
= 0xe3100001;
5658 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
5659 static const insn32 armbx3_bx_insn
= 0xe12fff10;
5661 #ifndef ELFARM_NABI_C_INCLUDED
5663 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
5666 bfd_byte
* contents
;
5670 /* Do not include empty glue sections in the output. */
5673 s
= bfd_get_linker_section (abfd
, name
);
5675 s
->flags
|= SEC_EXCLUDE
;
5680 BFD_ASSERT (abfd
!= NULL
);
5682 s
= bfd_get_linker_section (abfd
, name
);
5683 BFD_ASSERT (s
!= NULL
);
5685 contents
= (bfd_byte
*) bfd_alloc (abfd
, size
);
5687 BFD_ASSERT (s
->size
== size
);
5688 s
->contents
= contents
;
5692 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
5694 struct elf32_arm_link_hash_table
* globals
;
5696 globals
= elf32_arm_hash_table (info
);
5697 BFD_ASSERT (globals
!= NULL
);
5699 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5700 globals
->arm_glue_size
,
5701 ARM2THUMB_GLUE_SECTION_NAME
);
5703 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5704 globals
->thumb_glue_size
,
5705 THUMB2ARM_GLUE_SECTION_NAME
);
5707 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5708 globals
->vfp11_erratum_glue_size
,
5709 VFP11_ERRATUM_VENEER_SECTION_NAME
);
5711 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
5712 globals
->bx_glue_size
,
5713 ARM_BX_GLUE_SECTION_NAME
);
5718 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5719 returns the symbol identifying the stub. */
5721 static struct elf_link_hash_entry
*
5722 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
5723 struct elf_link_hash_entry
* h
)
5725 const char * name
= h
->root
.root
.string
;
5728 struct elf_link_hash_entry
* myh
;
5729 struct bfd_link_hash_entry
* bh
;
5730 struct elf32_arm_link_hash_table
* globals
;
5734 globals
= elf32_arm_hash_table (link_info
);
5735 BFD_ASSERT (globals
!= NULL
);
5736 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5738 s
= bfd_get_linker_section
5739 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
5741 BFD_ASSERT (s
!= NULL
);
5743 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
5744 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
5746 BFD_ASSERT (tmp_name
);
5748 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
5750 myh
= elf_link_hash_lookup
5751 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
5755 /* We've already seen this guy. */
5760 /* The only trick here is using hash_table->arm_glue_size as the value.
5761 Even though the section isn't allocated yet, this is where we will be
5762 putting it. The +1 on the value marks that the stub has not been
5763 output yet - not that it is a Thumb function. */
5765 val
= globals
->arm_glue_size
+ 1;
5766 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5767 tmp_name
, BSF_GLOBAL
, s
, val
,
5768 NULL
, TRUE
, FALSE
, &bh
);
5770 myh
= (struct elf_link_hash_entry
*) bh
;
5771 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5772 myh
->forced_local
= 1;
5776 if (link_info
->shared
|| globals
->root
.is_relocatable_executable
5777 || globals
->pic_veneer
)
5778 size
= ARM2THUMB_PIC_GLUE_SIZE
;
5779 else if (globals
->use_blx
)
5780 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
5782 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
5785 globals
->arm_glue_size
+= size
;
5790 /* Allocate space for ARMv4 BX veneers. */
5793 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
5796 struct elf32_arm_link_hash_table
*globals
;
5798 struct elf_link_hash_entry
*myh
;
5799 struct bfd_link_hash_entry
*bh
;
5802 /* BX PC does not need a veneer. */
5806 globals
= elf32_arm_hash_table (link_info
);
5807 BFD_ASSERT (globals
!= NULL
);
5808 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
5810 /* Check if this veneer has already been allocated. */
5811 if (globals
->bx_glue_offset
[reg
])
5814 s
= bfd_get_linker_section
5815 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
5817 BFD_ASSERT (s
!= NULL
);
5819 /* Add symbol for veneer. */
5821 bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
5823 BFD_ASSERT (tmp_name
);
5825 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
5827 myh
= elf_link_hash_lookup
5828 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5830 BFD_ASSERT (myh
== NULL
);
5833 val
= globals
->bx_glue_size
;
5834 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
5835 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5836 NULL
, TRUE
, FALSE
, &bh
);
5838 myh
= (struct elf_link_hash_entry
*) bh
;
5839 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5840 myh
->forced_local
= 1;
5842 s
->size
+= ARM_BX_VENEER_SIZE
;
5843 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
5844 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
5848 /* Add an entry to the code/data map for section SEC. */
5851 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
5853 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
5854 unsigned int newidx
;
5856 if (sec_data
->map
== NULL
)
5858 sec_data
->map
= (elf32_arm_section_map
*)
5859 bfd_malloc (sizeof (elf32_arm_section_map
));
5860 sec_data
->mapcount
= 0;
5861 sec_data
->mapsize
= 1;
5864 newidx
= sec_data
->mapcount
++;
5866 if (sec_data
->mapcount
> sec_data
->mapsize
)
5868 sec_data
->mapsize
*= 2;
5869 sec_data
->map
= (elf32_arm_section_map
*)
5870 bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
5871 * sizeof (elf32_arm_section_map
));
5876 sec_data
->map
[newidx
].vma
= vma
;
5877 sec_data
->map
[newidx
].type
= type
;
5882 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
5883 veneers are handled for now. */
5886 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
5887 elf32_vfp11_erratum_list
*branch
,
5889 asection
*branch_sec
,
5890 unsigned int offset
)
5893 struct elf32_arm_link_hash_table
*hash_table
;
5895 struct elf_link_hash_entry
*myh
;
5896 struct bfd_link_hash_entry
*bh
;
5898 struct _arm_elf_section_data
*sec_data
;
5899 elf32_vfp11_erratum_list
*newerr
;
5901 hash_table
= elf32_arm_hash_table (link_info
);
5902 BFD_ASSERT (hash_table
!= NULL
);
5903 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
5905 s
= bfd_get_linker_section
5906 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
5908 sec_data
= elf32_arm_section_data (s
);
5910 BFD_ASSERT (s
!= NULL
);
5912 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
5913 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
5915 BFD_ASSERT (tmp_name
);
5917 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
5918 hash_table
->num_vfp11_fixes
);
5920 myh
= elf_link_hash_lookup
5921 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5923 BFD_ASSERT (myh
== NULL
);
5926 val
= hash_table
->vfp11_erratum_glue_size
;
5927 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
5928 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
5929 NULL
, TRUE
, FALSE
, &bh
);
5931 myh
= (struct elf_link_hash_entry
*) bh
;
5932 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5933 myh
->forced_local
= 1;
5935 /* Link veneer back to calling location. */
5936 sec_data
->erratumcount
+= 1;
5937 newerr
= (elf32_vfp11_erratum_list
*)
5938 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
5940 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
5942 newerr
->u
.v
.branch
= branch
;
5943 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
5944 branch
->u
.b
.veneer
= newerr
;
5946 newerr
->next
= sec_data
->erratumlist
;
5947 sec_data
->erratumlist
= newerr
;
5949 /* A symbol for the return from the veneer. */
5950 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
5951 hash_table
->num_vfp11_fixes
);
5953 myh
= elf_link_hash_lookup
5954 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
5961 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
5962 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
5964 myh
= (struct elf_link_hash_entry
*) bh
;
5965 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
5966 myh
->forced_local
= 1;
5970 /* Generate a mapping symbol for the veneer section, and explicitly add an
5971 entry for that symbol to the code/data map for the section. */
5972 if (hash_table
->vfp11_erratum_glue_size
== 0)
5975 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
5976 ever requires this erratum fix. */
5977 _bfd_generic_link_add_one_symbol (link_info
,
5978 hash_table
->bfd_of_glue_owner
, "$a",
5979 BSF_LOCAL
, s
, 0, NULL
,
5982 myh
= (struct elf_link_hash_entry
*) bh
;
5983 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
5984 myh
->forced_local
= 1;
5986 /* The elf32_arm_init_maps function only cares about symbols from input
5987 BFDs. We must make a note of this generated mapping symbol
5988 ourselves so that code byteswapping works properly in
5989 elf32_arm_write_section. */
5990 elf32_arm_section_map_add (s
, 'a', 0);
5993 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
5994 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
5995 hash_table
->num_vfp11_fixes
++;
5997 /* The offset of the veneer. */
6001 #define ARM_GLUE_SECTION_FLAGS \
6002 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
6003 | SEC_READONLY | SEC_LINKER_CREATED)
6005 /* Create a fake section for use by the ARM backend of the linker. */
6008 arm_make_glue_section (bfd
* abfd
, const char * name
)
6012 sec
= bfd_get_linker_section (abfd
, name
);
6017 sec
= bfd_make_section_anyway_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
6020 || !bfd_set_section_alignment (abfd
, sec
, 2))
6023 /* Set the gc mark to prevent the section from being removed by garbage
6024 collection, despite the fact that no relocs refer to this section. */
6030 /* Add the glue sections to ABFD. This function is called from the
6031 linker scripts in ld/emultempl/{armelf}.em. */
6034 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
6035 struct bfd_link_info
*info
)
6037 /* If we are only performing a partial
6038 link do not bother adding the glue. */
6039 if (info
->relocatable
)
6042 return arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
6043 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
6044 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
6045 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
6048 /* Select a BFD to be used to hold the sections used by the glue code.
6049 This function is called from the linker scripts in ld/emultempl/
6053 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
6055 struct elf32_arm_link_hash_table
*globals
;
6057 /* If we are only performing a partial link
6058 do not bother getting a bfd to hold the glue. */
6059 if (info
->relocatable
)
6062 /* Make sure we don't attach the glue sections to a dynamic object. */
6063 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
6065 globals
= elf32_arm_hash_table (info
);
6066 BFD_ASSERT (globals
!= NULL
);
6068 if (globals
->bfd_of_glue_owner
!= NULL
)
6071 /* Save the bfd for later use. */
6072 globals
->bfd_of_glue_owner
= abfd
;
6078 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
6082 cpu_arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
6085 if (globals
->fix_arm1176
)
6087 if (cpu_arch
== TAG_CPU_ARCH_V6T2
|| cpu_arch
> TAG_CPU_ARCH_V6K
)
6088 globals
->use_blx
= 1;
6092 if (cpu_arch
> TAG_CPU_ARCH_V4T
)
6093 globals
->use_blx
= 1;
6098 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
6099 struct bfd_link_info
*link_info
)
6101 Elf_Internal_Shdr
*symtab_hdr
;
6102 Elf_Internal_Rela
*internal_relocs
= NULL
;
6103 Elf_Internal_Rela
*irel
, *irelend
;
6104 bfd_byte
*contents
= NULL
;
6107 struct elf32_arm_link_hash_table
*globals
;
6109 /* If we are only performing a partial link do not bother
6110 to construct any glue. */
6111 if (link_info
->relocatable
)
6114 /* Here we have a bfd that is to be included on the link. We have a
6115 hook to do reloc rummaging, before section sizes are nailed down. */
6116 globals
= elf32_arm_hash_table (link_info
);
6117 BFD_ASSERT (globals
!= NULL
);
6119 check_use_blx (globals
);
6121 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
6123 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
6128 /* PR 5398: If we have not decided to include any loadable sections in
6129 the output then we will not have a glue owner bfd. This is OK, it
6130 just means that there is nothing else for us to do here. */
6131 if (globals
->bfd_of_glue_owner
== NULL
)
6134 /* Rummage around all the relocs and map the glue vectors. */
6135 sec
= abfd
->sections
;
6140 for (; sec
!= NULL
; sec
= sec
->next
)
6142 if (sec
->reloc_count
== 0)
6145 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
6148 symtab_hdr
= & elf_symtab_hdr (abfd
);
6150 /* Load the relocs. */
6152 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
6154 if (internal_relocs
== NULL
)
6157 irelend
= internal_relocs
+ sec
->reloc_count
;
6158 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
6161 unsigned long r_index
;
6163 struct elf_link_hash_entry
*h
;
6165 r_type
= ELF32_R_TYPE (irel
->r_info
);
6166 r_index
= ELF32_R_SYM (irel
->r_info
);
6168 /* These are the only relocation types we care about. */
6169 if ( r_type
!= R_ARM_PC24
6170 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
6173 /* Get the section contents if we haven't done so already. */
6174 if (contents
== NULL
)
6176 /* Get cached copy if it exists. */
6177 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6178 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6181 /* Go get them off disk. */
6182 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6187 if (r_type
== R_ARM_V4BX
)
6191 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
6192 record_arm_bx_glue (link_info
, reg
);
6196 /* If the relocation is not against a symbol it cannot concern us. */
6199 /* We don't care about local symbols. */
6200 if (r_index
< symtab_hdr
->sh_info
)
6203 /* This is an external symbol. */
6204 r_index
-= symtab_hdr
->sh_info
;
6205 h
= (struct elf_link_hash_entry
*)
6206 elf_sym_hashes (abfd
)[r_index
];
6208 /* If the relocation is against a static symbol it must be within
6209 the current section and so cannot be a cross ARM/Thumb relocation. */
6213 /* If the call will go through a PLT entry then we do not need
6215 if (globals
->root
.splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
6221 /* This one is a call from arm code. We need to look up
6222 the target of the call. If it is a thumb target, we
6224 if (h
->target_internal
== ST_BRANCH_TO_THUMB
)
6225 record_arm_to_thumb_glue (link_info
, h
);
6233 if (contents
!= NULL
6234 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6238 if (internal_relocs
!= NULL
6239 && elf_section_data (sec
)->relocs
!= internal_relocs
)
6240 free (internal_relocs
);
6241 internal_relocs
= NULL
;
6247 if (contents
!= NULL
6248 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6250 if (internal_relocs
!= NULL
6251 && elf_section_data (sec
)->relocs
!= internal_relocs
)
6252 free (internal_relocs
);
6259 /* Initialise maps of ARM/Thumb/data for input BFDs. */
6262 bfd_elf32_arm_init_maps (bfd
*abfd
)
6264 Elf_Internal_Sym
*isymbuf
;
6265 Elf_Internal_Shdr
*hdr
;
6266 unsigned int i
, localsyms
;
6268 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
6269 if (! is_arm_elf (abfd
))
6272 if ((abfd
->flags
& DYNAMIC
) != 0)
6275 hdr
= & elf_symtab_hdr (abfd
);
6276 localsyms
= hdr
->sh_info
;
6278 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
6279 should contain the number of local symbols, which should come before any
6280 global symbols. Mapping symbols are always local. */
6281 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
6284 /* No internal symbols read? Skip this BFD. */
6285 if (isymbuf
== NULL
)
6288 for (i
= 0; i
< localsyms
; i
++)
6290 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
6291 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
6295 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
6297 name
= bfd_elf_string_from_elf_section (abfd
,
6298 hdr
->sh_link
, isym
->st_name
);
6300 if (bfd_is_arm_special_symbol_name (name
,
6301 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
6302 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
6308 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
6309 say what they wanted. */
6312 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
6314 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6315 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
6317 if (globals
== NULL
)
6320 if (globals
->fix_cortex_a8
== -1)
6322 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
6323 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
6324 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
6325 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
6326 globals
->fix_cortex_a8
= 1;
6328 globals
->fix_cortex_a8
= 0;
6334 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
6336 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6337 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
6339 if (globals
== NULL
)
6341 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
6342 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
6344 switch (globals
->vfp11_fix
)
6346 case BFD_ARM_VFP11_FIX_DEFAULT
:
6347 case BFD_ARM_VFP11_FIX_NONE
:
6348 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
6352 /* Give a warning, but do as the user requests anyway. */
6353 (*_bfd_error_handler
) (_("%B: warning: selected VFP11 erratum "
6354 "workaround is not necessary for target architecture"), obfd
);
6357 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
6358 /* For earlier architectures, we might need the workaround, but do not
6359 enable it by default. If users is running with broken hardware, they
6360 must enable the erratum fix explicitly. */
6361 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
6365 enum bfd_arm_vfp11_pipe
6373 /* Return a VFP register number. This is encoded as RX:X for single-precision
6374 registers, or X:RX for double-precision registers, where RX is the group of
6375 four bits in the instruction encoding and X is the single extension bit.
6376 RX and X fields are specified using their lowest (starting) bit. The return
6379 0...31: single-precision registers s0...s31
6380 32...63: double-precision registers d0...d31.
6382 Although X should be zero for VFP11 (encoding d0...d15 only), we might
6383 encounter VFP3 instructions, so we allow the full range for DP registers. */
6386 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
6390 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
6392 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
6395 /* Set bits in *WMASK according to a register number REG as encoded by
6396 bfd_arm_vfp11_regno(). Ignore d16-d31. */
6399 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
6404 *wmask
|= 3 << ((reg
- 32) * 2);
6407 /* Return TRUE if WMASK overwrites anything in REGS. */
6410 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
6414 for (i
= 0; i
< numregs
; i
++)
6416 unsigned int reg
= regs
[i
];
6418 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
6426 if ((wmask
& (3 << (reg
* 2))) != 0)
6433 /* In this function, we're interested in two things: finding input registers
6434 for VFP data-processing instructions, and finding the set of registers which
6435 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
6436 hold the written set, so FLDM etc. are easy to deal with (we're only
6437 interested in 32 SP registers or 16 dp registers, due to the VFP version
6438 implemented by the chip in question). DP registers are marked by setting
6439 both SP registers in the write mask). */
6441 static enum bfd_arm_vfp11_pipe
6442 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
6445 enum bfd_arm_vfp11_pipe vpipe
= VFP11_BAD
;
6446 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
6448 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
6451 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
6452 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
6454 pqrs
= ((insn
& 0x00800000) >> 20)
6455 | ((insn
& 0x00300000) >> 19)
6456 | ((insn
& 0x00000040) >> 6);
6460 case 0: /* fmac[sd]. */
6461 case 1: /* fnmac[sd]. */
6462 case 2: /* fmsc[sd]. */
6463 case 3: /* fnmsc[sd]. */
6465 bfd_arm_vfp11_write_mask (destmask
, fd
);
6467 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
6472 case 4: /* fmul[sd]. */
6473 case 5: /* fnmul[sd]. */
6474 case 6: /* fadd[sd]. */
6475 case 7: /* fsub[sd]. */
6479 case 8: /* fdiv[sd]. */
6482 bfd_arm_vfp11_write_mask (destmask
, fd
);
6483 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
6488 case 15: /* extended opcode. */
6490 unsigned int extn
= ((insn
>> 15) & 0x1e)
6491 | ((insn
>> 7) & 1);
6495 case 0: /* fcpy[sd]. */
6496 case 1: /* fabs[sd]. */
6497 case 2: /* fneg[sd]. */
6498 case 8: /* fcmp[sd]. */
6499 case 9: /* fcmpe[sd]. */
6500 case 10: /* fcmpz[sd]. */
6501 case 11: /* fcmpez[sd]. */
6502 case 16: /* fuito[sd]. */
6503 case 17: /* fsito[sd]. */
6504 case 24: /* ftoui[sd]. */
6505 case 25: /* ftouiz[sd]. */
6506 case 26: /* ftosi[sd]. */
6507 case 27: /* ftosiz[sd]. */
6508 /* These instructions will not bounce due to underflow. */
6513 case 3: /* fsqrt[sd]. */
6514 /* fsqrt cannot underflow, but it can (perhaps) overwrite
6515 registers to cause the erratum in previous instructions. */
6516 bfd_arm_vfp11_write_mask (destmask
, fd
);
6520 case 15: /* fcvt{ds,sd}. */
6524 bfd_arm_vfp11_write_mask (destmask
, fd
);
6526 /* Only FCVTSD can underflow. */
6527 if ((insn
& 0x100) != 0)
6546 /* Two-register transfer. */
6547 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
6549 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
6551 if ((insn
& 0x100000) == 0)
6554 bfd_arm_vfp11_write_mask (destmask
, fm
);
6557 bfd_arm_vfp11_write_mask (destmask
, fm
);
6558 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
6564 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
6566 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
6567 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
6571 case 0: /* Two-reg transfer. We should catch these above. */
6574 case 2: /* fldm[sdx]. */
6578 unsigned int i
, offset
= insn
& 0xff;
6583 for (i
= fd
; i
< fd
+ offset
; i
++)
6584 bfd_arm_vfp11_write_mask (destmask
, i
);
6588 case 4: /* fld[sd]. */
6590 bfd_arm_vfp11_write_mask (destmask
, fd
);
6599 /* Single-register transfer. Note L==0. */
6600 else if ((insn
& 0x0f100e10) == 0x0e000a10)
6602 unsigned int opcode
= (insn
>> 21) & 7;
6603 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
6607 case 0: /* fmsr/fmdlr. */
6608 case 1: /* fmdhr. */
6609 /* Mark fmdhr and fmdlr as writing to the whole of the DP
6610 destination register. I don't know if this is exactly right,
6611 but it is the conservative choice. */
6612 bfd_arm_vfp11_write_mask (destmask
, fn
);
6626 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
6629 /* Look for potentially-troublesome code sequences which might trigger the
6630 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
6631 (available from ARM) for details of the erratum. A short version is
6632 described in ld.texinfo. */
6635 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
6638 bfd_byte
*contents
= NULL
;
6640 int regs
[3], numregs
= 0;
6641 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
6642 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
6644 if (globals
== NULL
)
6647 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
6648 The states transition as follows:
6650 0 -> 1 (vector) or 0 -> 2 (scalar)
6651 A VFP FMAC-pipeline instruction has been seen. Fill
6652 regs[0]..regs[numregs-1] with its input operands. Remember this
6653 instruction in 'first_fmac'.
6656 Any instruction, except for a VFP instruction which overwrites
6661 A VFP instruction has been seen which overwrites any of regs[*].
6662 We must make a veneer! Reset state to 0 before examining next
6666 If we fail to match anything in state 2, reset to state 0 and reset
6667 the instruction pointer to the instruction after 'first_fmac'.
6669 If the VFP11 vector mode is in use, there must be at least two unrelated
6670 instructions between anti-dependent VFP11 instructions to properly avoid
6671 triggering the erratum, hence the use of the extra state 1. */
6673 /* If we are only performing a partial link do not bother
6674 to construct any glue. */
6675 if (link_info
->relocatable
)
6678 /* Skip if this bfd does not correspond to an ELF image. */
6679 if (! is_arm_elf (abfd
))
6682 /* We should have chosen a fix type by the time we get here. */
6683 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
6685 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
6688 /* Skip this BFD if it corresponds to an executable or dynamic object. */
6689 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
6692 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6694 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
6695 struct _arm_elf_section_data
*sec_data
;
6697 /* If we don't have executable progbits, we're not interested in this
6698 section. Also skip if section is to be excluded. */
6699 if (elf_section_type (sec
) != SHT_PROGBITS
6700 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
6701 || (sec
->flags
& SEC_EXCLUDE
) != 0
6702 || sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
6703 || sec
->output_section
== bfd_abs_section_ptr
6704 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
6707 sec_data
= elf32_arm_section_data (sec
);
6709 if (sec_data
->mapcount
== 0)
6712 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
6713 contents
= elf_section_data (sec
)->this_hdr
.contents
;
6714 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
6717 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
6718 elf32_arm_compare_mapping
);
6720 for (span
= 0; span
< sec_data
->mapcount
; span
++)
6722 unsigned int span_start
= sec_data
->map
[span
].vma
;
6723 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
6724 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
6725 char span_type
= sec_data
->map
[span
].type
;
6727 /* FIXME: Only ARM mode is supported at present. We may need to
6728 support Thumb-2 mode also at some point. */
6729 if (span_type
!= 'a')
6732 for (i
= span_start
; i
< span_end
;)
6734 unsigned int next_i
= i
+ 4;
6735 unsigned int insn
= bfd_big_endian (abfd
)
6736 ? (contents
[i
] << 24)
6737 | (contents
[i
+ 1] << 16)
6738 | (contents
[i
+ 2] << 8)
6740 : (contents
[i
+ 3] << 24)
6741 | (contents
[i
+ 2] << 16)
6742 | (contents
[i
+ 1] << 8)
6744 unsigned int writemask
= 0;
6745 enum bfd_arm_vfp11_pipe vpipe
;
6750 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
6752 /* I'm assuming the VFP11 erratum can trigger with denorm
6753 operands on either the FMAC or the DS pipeline. This might
6754 lead to slightly overenthusiastic veneer insertion. */
6755 if (vpipe
== VFP11_FMAC
|| vpipe
== VFP11_DS
)
6757 state
= use_vector
? 1 : 2;
6759 veneer_of_insn
= insn
;
6765 int other_regs
[3], other_numregs
;
6766 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6769 if (vpipe
!= VFP11_BAD
6770 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6780 int other_regs
[3], other_numregs
;
6781 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
6784 if (vpipe
!= VFP11_BAD
6785 && bfd_arm_vfp11_antidependency (writemask
, regs
,
6791 next_i
= first_fmac
+ 4;
6797 abort (); /* Should be unreachable. */
6802 elf32_vfp11_erratum_list
*newerr
=(elf32_vfp11_erratum_list
*)
6803 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
6805 elf32_arm_section_data (sec
)->erratumcount
+= 1;
6807 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
6812 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
6819 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
6824 newerr
->next
= sec_data
->erratumlist
;
6825 sec_data
->erratumlist
= newerr
;
6834 if (contents
!= NULL
6835 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6843 if (contents
!= NULL
6844 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
6850 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
6851 after sections have been laid out, using specially-named symbols. */
6854 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
6855 struct bfd_link_info
*link_info
)
6858 struct elf32_arm_link_hash_table
*globals
;
6861 if (link_info
->relocatable
)
6864 /* Skip if this bfd does not correspond to an ELF image. */
6865 if (! is_arm_elf (abfd
))
6868 globals
= elf32_arm_hash_table (link_info
);
6869 if (globals
== NULL
)
6872 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
6873 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
6875 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6877 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
6878 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
6880 for (; errnode
!= NULL
; errnode
= errnode
->next
)
6882 struct elf_link_hash_entry
*myh
;
6885 switch (errnode
->type
)
6887 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
6888 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
6889 /* Find veneer symbol. */
6890 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
6891 errnode
->u
.b
.veneer
->u
.v
.id
);
6893 myh
= elf_link_hash_lookup
6894 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6897 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6898 "`%s'"), abfd
, tmp_name
);
6900 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6901 + myh
->root
.u
.def
.section
->output_offset
6902 + myh
->root
.u
.def
.value
;
6904 errnode
->u
.b
.veneer
->vma
= vma
;
6907 case VFP11_ERRATUM_ARM_VENEER
:
6908 case VFP11_ERRATUM_THUMB_VENEER
:
6909 /* Find return location. */
6910 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
6913 myh
= elf_link_hash_lookup
6914 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6917 (*_bfd_error_handler
) (_("%B: unable to find VFP11 veneer "
6918 "`%s'"), abfd
, tmp_name
);
6920 vma
= myh
->root
.u
.def
.section
->output_section
->vma
6921 + myh
->root
.u
.def
.section
->output_offset
6922 + myh
->root
.u
.def
.value
;
6924 errnode
->u
.v
.branch
->vma
= vma
;
6937 /* Set target relocation values needed during linking. */
6940 bfd_elf32_arm_set_target_relocs (struct bfd
*output_bfd
,
6941 struct bfd_link_info
*link_info
,
6943 char * target2_type
,
6946 bfd_arm_vfp11_fix vfp11_fix
,
6947 int no_enum_warn
, int no_wchar_warn
,
6948 int pic_veneer
, int fix_cortex_a8
,
6951 struct elf32_arm_link_hash_table
*globals
;
6953 globals
= elf32_arm_hash_table (link_info
);
6954 if (globals
== NULL
)
6957 globals
->target1_is_rel
= target1_is_rel
;
6958 if (strcmp (target2_type
, "rel") == 0)
6959 globals
->target2_reloc
= R_ARM_REL32
;
6960 else if (strcmp (target2_type
, "abs") == 0)
6961 globals
->target2_reloc
= R_ARM_ABS32
;
6962 else if (strcmp (target2_type
, "got-rel") == 0)
6963 globals
->target2_reloc
= R_ARM_GOT_PREL
;
6966 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
6969 globals
->fix_v4bx
= fix_v4bx
;
6970 globals
->use_blx
|= use_blx
;
6971 globals
->vfp11_fix
= vfp11_fix
;
6972 globals
->pic_veneer
= pic_veneer
;
6973 globals
->fix_cortex_a8
= fix_cortex_a8
;
6974 globals
->fix_arm1176
= fix_arm1176
;
6976 BFD_ASSERT (is_arm_elf (output_bfd
));
6977 elf_arm_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
6978 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
6981 /* Replace the target offset of a Thumb bl or b.w instruction. */
6984 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
6990 BFD_ASSERT ((offset
& 1) == 0);
6992 upper
= bfd_get_16 (abfd
, insn
);
6993 lower
= bfd_get_16 (abfd
, insn
+ 2);
6994 reloc_sign
= (offset
< 0) ? 1 : 0;
6995 upper
= (upper
& ~(bfd_vma
) 0x7ff)
6996 | ((offset
>> 12) & 0x3ff)
6997 | (reloc_sign
<< 10);
6998 lower
= (lower
& ~(bfd_vma
) 0x2fff)
6999 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
7000 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
7001 | ((offset
>> 1) & 0x7ff);
7002 bfd_put_16 (abfd
, upper
, insn
);
7003 bfd_put_16 (abfd
, lower
, insn
+ 2);
7006 /* Thumb code calling an ARM function. */
7009 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
7013 asection
* input_section
,
7014 bfd_byte
* hit_data
,
7017 bfd_signed_vma addend
,
7019 char **error_message
)
7023 long int ret_offset
;
7024 struct elf_link_hash_entry
* myh
;
7025 struct elf32_arm_link_hash_table
* globals
;
7027 myh
= find_thumb_glue (info
, name
, error_message
);
7031 globals
= elf32_arm_hash_table (info
);
7032 BFD_ASSERT (globals
!= NULL
);
7033 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7035 my_offset
= myh
->root
.u
.def
.value
;
7037 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7038 THUMB2ARM_GLUE_SECTION_NAME
);
7040 BFD_ASSERT (s
!= NULL
);
7041 BFD_ASSERT (s
->contents
!= NULL
);
7042 BFD_ASSERT (s
->output_section
!= NULL
);
7044 if ((my_offset
& 0x01) == 0x01)
7047 && sym_sec
->owner
!= NULL
7048 && !INTERWORK_FLAG (sym_sec
->owner
))
7050 (*_bfd_error_handler
)
7051 (_("%B(%s): warning: interworking not enabled.\n"
7052 " first occurrence: %B: Thumb call to ARM"),
7053 sym_sec
->owner
, input_bfd
, name
);
7059 myh
->root
.u
.def
.value
= my_offset
;
7061 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
7062 s
->contents
+ my_offset
);
7064 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
7065 s
->contents
+ my_offset
+ 2);
7068 /* Address of destination of the stub. */
7069 ((bfd_signed_vma
) val
)
7071 /* Offset from the start of the current section
7072 to the start of the stubs. */
7074 /* Offset of the start of this stub from the start of the stubs. */
7076 /* Address of the start of the current section. */
7077 + s
->output_section
->vma
)
7078 /* The branch instruction is 4 bytes into the stub. */
7080 /* ARM branches work from the pc of the instruction + 8. */
7083 put_arm_insn (globals
, output_bfd
,
7084 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
7085 s
->contents
+ my_offset
+ 4);
7088 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
7090 /* Now go back and fix up the original BL insn to point to here. */
7092 /* Address of where the stub is located. */
7093 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
7094 /* Address of where the BL is located. */
7095 - (input_section
->output_section
->vma
+ input_section
->output_offset
7097 /* Addend in the relocation. */
7099 /* Biassing for PC-relative addressing. */
7102 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
7107 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
7109 static struct elf_link_hash_entry
*
7110 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
7117 char ** error_message
)
7120 long int ret_offset
;
7121 struct elf_link_hash_entry
* myh
;
7122 struct elf32_arm_link_hash_table
* globals
;
7124 myh
= find_arm_glue (info
, name
, error_message
);
7128 globals
= elf32_arm_hash_table (info
);
7129 BFD_ASSERT (globals
!= NULL
);
7130 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7132 my_offset
= myh
->root
.u
.def
.value
;
7134 if ((my_offset
& 0x01) == 0x01)
7137 && sym_sec
->owner
!= NULL
7138 && !INTERWORK_FLAG (sym_sec
->owner
))
7140 (*_bfd_error_handler
)
7141 (_("%B(%s): warning: interworking not enabled.\n"
7142 " first occurrence: %B: arm call to thumb"),
7143 sym_sec
->owner
, input_bfd
, name
);
7147 myh
->root
.u
.def
.value
= my_offset
;
7149 if (info
->shared
|| globals
->root
.is_relocatable_executable
7150 || globals
->pic_veneer
)
7152 /* For relocatable objects we can't use absolute addresses,
7153 so construct the address from a relative offset. */
7154 /* TODO: If the offset is small it's probably worth
7155 constructing the address with adds. */
7156 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
7157 s
->contents
+ my_offset
);
7158 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
7159 s
->contents
+ my_offset
+ 4);
7160 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
7161 s
->contents
+ my_offset
+ 8);
7162 /* Adjust the offset by 4 for the position of the add,
7163 and 8 for the pipeline offset. */
7164 ret_offset
= (val
- (s
->output_offset
7165 + s
->output_section
->vma
7168 bfd_put_32 (output_bfd
, ret_offset
,
7169 s
->contents
+ my_offset
+ 12);
7171 else if (globals
->use_blx
)
7173 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
7174 s
->contents
+ my_offset
);
7176 /* It's a thumb address. Add the low order bit. */
7177 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
7178 s
->contents
+ my_offset
+ 4);
7182 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
7183 s
->contents
+ my_offset
);
7185 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
7186 s
->contents
+ my_offset
+ 4);
7188 /* It's a thumb address. Add the low order bit. */
7189 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
7190 s
->contents
+ my_offset
+ 8);
7196 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
7201 /* Arm code calling a Thumb function. */
7204 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
7208 asection
* input_section
,
7209 bfd_byte
* hit_data
,
7212 bfd_signed_vma addend
,
7214 char **error_message
)
7216 unsigned long int tmp
;
7219 long int ret_offset
;
7220 struct elf_link_hash_entry
* myh
;
7221 struct elf32_arm_link_hash_table
* globals
;
7223 globals
= elf32_arm_hash_table (info
);
7224 BFD_ASSERT (globals
!= NULL
);
7225 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7227 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7228 ARM2THUMB_GLUE_SECTION_NAME
);
7229 BFD_ASSERT (s
!= NULL
);
7230 BFD_ASSERT (s
->contents
!= NULL
);
7231 BFD_ASSERT (s
->output_section
!= NULL
);
7233 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
7234 sym_sec
, val
, s
, error_message
);
7238 my_offset
= myh
->root
.u
.def
.value
;
7239 tmp
= bfd_get_32 (input_bfd
, hit_data
);
7240 tmp
= tmp
& 0xFF000000;
7242 /* Somehow these are both 4 too far, so subtract 8. */
7243 ret_offset
= (s
->output_offset
7245 + s
->output_section
->vma
7246 - (input_section
->output_offset
7247 + input_section
->output_section
->vma
7251 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
7253 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
7258 /* Populate Arm stub for an exported Thumb function. */
7261 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
7263 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
7265 struct elf_link_hash_entry
* myh
;
7266 struct elf32_arm_link_hash_entry
*eh
;
7267 struct elf32_arm_link_hash_table
* globals
;
7270 char *error_message
;
7272 eh
= elf32_arm_hash_entry (h
);
7273 /* Allocate stubs for exported Thumb functions on v4t. */
7274 if (eh
->export_glue
== NULL
)
7277 globals
= elf32_arm_hash_table (info
);
7278 BFD_ASSERT (globals
!= NULL
);
7279 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7281 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7282 ARM2THUMB_GLUE_SECTION_NAME
);
7283 BFD_ASSERT (s
!= NULL
);
7284 BFD_ASSERT (s
->contents
!= NULL
);
7285 BFD_ASSERT (s
->output_section
!= NULL
);
7287 sec
= eh
->export_glue
->root
.u
.def
.section
;
7289 BFD_ASSERT (sec
->output_section
!= NULL
);
7291 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
7292 + sec
->output_section
->vma
;
7294 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
7295 h
->root
.u
.def
.section
->owner
,
7296 globals
->obfd
, sec
, val
, s
,
7302 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
7305 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
7310 struct elf32_arm_link_hash_table
*globals
;
7312 globals
= elf32_arm_hash_table (info
);
7313 BFD_ASSERT (globals
!= NULL
);
7314 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7316 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
7317 ARM_BX_GLUE_SECTION_NAME
);
7318 BFD_ASSERT (s
!= NULL
);
7319 BFD_ASSERT (s
->contents
!= NULL
);
7320 BFD_ASSERT (s
->output_section
!= NULL
);
7322 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
7324 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
7326 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
7328 p
= s
->contents
+ glue_addr
;
7329 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
7330 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
7331 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
7332 globals
->bx_glue_offset
[reg
] |= 1;
7335 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
7338 /* Generate Arm stubs for exported Thumb symbols. */
7340 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
7341 struct bfd_link_info
*link_info
)
7343 struct elf32_arm_link_hash_table
* globals
;
7345 if (link_info
== NULL
)
7346 /* Ignore this if we are not called by the ELF backend linker. */
7349 globals
= elf32_arm_hash_table (link_info
);
7350 if (globals
== NULL
)
7353 /* If blx is available then exported Thumb symbols are OK and there is
7355 if (globals
->use_blx
)
7358 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
7362 /* Reserve space for COUNT dynamic relocations in relocation selection
7366 elf32_arm_allocate_dynrelocs (struct bfd_link_info
*info
, asection
*sreloc
,
7367 bfd_size_type count
)
7369 struct elf32_arm_link_hash_table
*htab
;
7371 htab
= elf32_arm_hash_table (info
);
7372 BFD_ASSERT (htab
->root
.dynamic_sections_created
);
7375 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
7378 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
7379 dynamic, the relocations should go in SRELOC, otherwise they should
7380 go in the special .rel.iplt section. */
7383 elf32_arm_allocate_irelocs (struct bfd_link_info
*info
, asection
*sreloc
,
7384 bfd_size_type count
)
7386 struct elf32_arm_link_hash_table
*htab
;
7388 htab
= elf32_arm_hash_table (info
);
7389 if (!htab
->root
.dynamic_sections_created
)
7390 htab
->root
.irelplt
->size
+= RELOC_SIZE (htab
) * count
;
7393 BFD_ASSERT (sreloc
!= NULL
);
7394 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
7398 /* Add relocation REL to the end of relocation section SRELOC. */
7401 elf32_arm_add_dynreloc (bfd
*output_bfd
, struct bfd_link_info
*info
,
7402 asection
*sreloc
, Elf_Internal_Rela
*rel
)
7405 struct elf32_arm_link_hash_table
*htab
;
7407 htab
= elf32_arm_hash_table (info
);
7408 if (!htab
->root
.dynamic_sections_created
7409 && ELF32_R_TYPE (rel
->r_info
) == R_ARM_IRELATIVE
)
7410 sreloc
= htab
->root
.irelplt
;
7413 loc
= sreloc
->contents
;
7414 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (htab
);
7415 if (sreloc
->reloc_count
* RELOC_SIZE (htab
) > sreloc
->size
)
7417 SWAP_RELOC_OUT (htab
) (output_bfd
, rel
, loc
);
7420 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
7421 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
7425 elf32_arm_allocate_plt_entry (struct bfd_link_info
*info
,
7426 bfd_boolean is_iplt_entry
,
7427 union gotplt_union
*root_plt
,
7428 struct arm_plt_info
*arm_plt
)
7430 struct elf32_arm_link_hash_table
*htab
;
7434 htab
= elf32_arm_hash_table (info
);
7438 splt
= htab
->root
.iplt
;
7439 sgotplt
= htab
->root
.igotplt
;
7441 /* NaCl uses a special first entry in .iplt too. */
7442 if (htab
->nacl_p
&& splt
->size
== 0)
7443 splt
->size
+= htab
->plt_header_size
;
7445 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
7446 elf32_arm_allocate_irelocs (info
, htab
->root
.irelplt
, 1);
7450 splt
= htab
->root
.splt
;
7451 sgotplt
= htab
->root
.sgotplt
;
7453 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
7454 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
7456 /* If this is the first .plt entry, make room for the special
7458 if (splt
->size
== 0)
7459 splt
->size
+= htab
->plt_header_size
;
7462 /* Allocate the PLT entry itself, including any leading Thumb stub. */
7463 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
7464 splt
->size
+= PLT_THUMB_STUB_SIZE
;
7465 root_plt
->offset
= splt
->size
;
7466 splt
->size
+= htab
->plt_entry_size
;
7468 if (!htab
->symbian_p
)
7470 /* We also need to make an entry in the .got.plt section, which
7471 will be placed in the .got section by the linker script. */
7472 arm_plt
->got_offset
= sgotplt
->size
- 8 * htab
->num_tls_desc
;
7478 arm_movw_immediate (bfd_vma value
)
7480 return (value
& 0x00000fff) | ((value
& 0x0000f000) << 4);
7484 arm_movt_immediate (bfd_vma value
)
7486 return ((value
& 0x0fff0000) >> 16) | ((value
& 0xf0000000) >> 12);
7489 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
7490 the entry lives in .iplt and resolves to (*SYM_VALUE)().
7491 Otherwise, DYNINDX is the index of the symbol in the dynamic
7492 symbol table and SYM_VALUE is undefined.
7494 ROOT_PLT points to the offset of the PLT entry from the start of its
7495 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
7496 bookkeeping information.
7498 Returns FALSE if there was a problem. */
7501 elf32_arm_populate_plt_entry (bfd
*output_bfd
, struct bfd_link_info
*info
,
7502 union gotplt_union
*root_plt
,
7503 struct arm_plt_info
*arm_plt
,
7504 int dynindx
, bfd_vma sym_value
)
7506 struct elf32_arm_link_hash_table
*htab
;
7512 Elf_Internal_Rela rel
;
7513 bfd_vma plt_header_size
;
7514 bfd_vma got_header_size
;
7516 htab
= elf32_arm_hash_table (info
);
7518 /* Pick the appropriate sections and sizes. */
7521 splt
= htab
->root
.iplt
;
7522 sgot
= htab
->root
.igotplt
;
7523 srel
= htab
->root
.irelplt
;
7525 /* There are no reserved entries in .igot.plt, and no special
7526 first entry in .iplt. */
7527 got_header_size
= 0;
7528 plt_header_size
= 0;
7532 splt
= htab
->root
.splt
;
7533 sgot
= htab
->root
.sgotplt
;
7534 srel
= htab
->root
.srelplt
;
7536 got_header_size
= get_elf_backend_data (output_bfd
)->got_header_size
;
7537 plt_header_size
= htab
->plt_header_size
;
7539 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
7541 /* Fill in the entry in the procedure linkage table. */
7542 if (htab
->symbian_p
)
7544 BFD_ASSERT (dynindx
>= 0);
7545 put_arm_insn (htab
, output_bfd
,
7546 elf32_arm_symbian_plt_entry
[0],
7547 splt
->contents
+ root_plt
->offset
);
7548 bfd_put_32 (output_bfd
,
7549 elf32_arm_symbian_plt_entry
[1],
7550 splt
->contents
+ root_plt
->offset
+ 4);
7552 /* Fill in the entry in the .rel.plt section. */
7553 rel
.r_offset
= (splt
->output_section
->vma
7554 + splt
->output_offset
7555 + root_plt
->offset
+ 4);
7556 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_GLOB_DAT
);
7558 /* Get the index in the procedure linkage table which
7559 corresponds to this symbol. This is the index of this symbol
7560 in all the symbols for which we are making plt entries. The
7561 first entry in the procedure linkage table is reserved. */
7562 plt_index
= ((root_plt
->offset
- plt_header_size
)
7563 / htab
->plt_entry_size
);
7567 bfd_vma got_offset
, got_address
, plt_address
;
7568 bfd_vma got_displacement
, initial_got_entry
;
7571 BFD_ASSERT (sgot
!= NULL
);
7573 /* Get the offset into the .(i)got.plt table of the entry that
7574 corresponds to this function. */
7575 got_offset
= (arm_plt
->got_offset
& -2);
7577 /* Get the index in the procedure linkage table which
7578 corresponds to this symbol. This is the index of this symbol
7579 in all the symbols for which we are making plt entries.
7580 After the reserved .got.plt entries, all symbols appear in
7581 the same order as in .plt. */
7582 plt_index
= (got_offset
- got_header_size
) / 4;
7584 /* Calculate the address of the GOT entry. */
7585 got_address
= (sgot
->output_section
->vma
7586 + sgot
->output_offset
7589 /* ...and the address of the PLT entry. */
7590 plt_address
= (splt
->output_section
->vma
7591 + splt
->output_offset
7592 + root_plt
->offset
);
7594 ptr
= splt
->contents
+ root_plt
->offset
;
7595 if (htab
->vxworks_p
&& info
->shared
)
7600 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
7602 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
7604 val
|= got_address
- sgot
->output_section
->vma
;
7606 val
|= plt_index
* RELOC_SIZE (htab
);
7607 if (i
== 2 || i
== 5)
7608 bfd_put_32 (output_bfd
, val
, ptr
);
7610 put_arm_insn (htab
, output_bfd
, val
, ptr
);
7613 else if (htab
->vxworks_p
)
7618 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
7620 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
7624 val
|= 0xffffff & -((root_plt
->offset
+ i
* 4 + 8) >> 2);
7626 val
|= plt_index
* RELOC_SIZE (htab
);
7627 if (i
== 2 || i
== 5)
7628 bfd_put_32 (output_bfd
, val
, ptr
);
7630 put_arm_insn (htab
, output_bfd
, val
, ptr
);
7633 loc
= (htab
->srelplt2
->contents
7634 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
7636 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
7637 referencing the GOT for this PLT entry. */
7638 rel
.r_offset
= plt_address
+ 8;
7639 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
7640 rel
.r_addend
= got_offset
;
7641 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7642 loc
+= RELOC_SIZE (htab
);
7644 /* Create the R_ARM_ABS32 relocation referencing the
7645 beginning of the PLT for this GOT entry. */
7646 rel
.r_offset
= got_address
;
7647 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
7649 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7651 else if (htab
->nacl_p
)
7653 /* Calculate the displacement between the PLT slot and the
7654 common tail that's part of the special initial PLT slot. */
7655 int32_t tail_displacement
7656 = ((splt
->output_section
->vma
+ splt
->output_offset
7657 + ARM_NACL_PLT_TAIL_OFFSET
)
7658 - (plt_address
+ htab
->plt_entry_size
+ 4));
7659 BFD_ASSERT ((tail_displacement
& 3) == 0);
7660 tail_displacement
>>= 2;
7662 BFD_ASSERT ((tail_displacement
& 0xff000000) == 0
7663 || (-tail_displacement
& 0xff000000) == 0);
7665 /* Calculate the displacement between the PLT slot and the entry
7666 in the GOT. The offset accounts for the value produced by
7667 adding to pc in the penultimate instruction of the PLT stub. */
7668 got_displacement
= (got_address
7669 - (plt_address
+ htab
->plt_entry_size
));
7671 /* NaCl does not support interworking at all. */
7672 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
));
7674 put_arm_insn (htab
, output_bfd
,
7675 elf32_arm_nacl_plt_entry
[0]
7676 | arm_movw_immediate (got_displacement
),
7678 put_arm_insn (htab
, output_bfd
,
7679 elf32_arm_nacl_plt_entry
[1]
7680 | arm_movt_immediate (got_displacement
),
7682 put_arm_insn (htab
, output_bfd
,
7683 elf32_arm_nacl_plt_entry
[2],
7685 put_arm_insn (htab
, output_bfd
,
7686 elf32_arm_nacl_plt_entry
[3]
7687 | (tail_displacement
& 0x00ffffff),
7690 else if (using_thumb_only (htab
))
7692 /* PR ld/16017: Do not generate ARM instructions for
7693 the PLT if compiling for a thumb-only target.
7695 FIXME: We ought to be able to generate thumb PLT instructions... */
7696 _bfd_error_handler (_("%B: Warning: thumb mode PLT generation not currently supported"),
7702 /* Calculate the displacement between the PLT slot and the
7703 entry in the GOT. The eight-byte offset accounts for the
7704 value produced by adding to pc in the first instruction
7706 got_displacement
= got_address
- (plt_address
+ 8);
7708 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
7710 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
7712 put_thumb_insn (htab
, output_bfd
,
7713 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
7714 put_thumb_insn (htab
, output_bfd
,
7715 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
7718 put_arm_insn (htab
, output_bfd
,
7719 elf32_arm_plt_entry
[0]
7720 | ((got_displacement
& 0x0ff00000) >> 20),
7722 put_arm_insn (htab
, output_bfd
,
7723 elf32_arm_plt_entry
[1]
7724 | ((got_displacement
& 0x000ff000) >> 12),
7726 put_arm_insn (htab
, output_bfd
,
7727 elf32_arm_plt_entry
[2]
7728 | (got_displacement
& 0x00000fff),
7730 #ifdef FOUR_WORD_PLT
7731 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3], ptr
+ 12);
7735 /* Fill in the entry in the .rel(a).(i)plt section. */
7736 rel
.r_offset
= got_address
;
7740 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
7741 The dynamic linker or static executable then calls SYM_VALUE
7742 to determine the correct run-time value of the .igot.plt entry. */
7743 rel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
7744 initial_got_entry
= sym_value
;
7748 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_JUMP_SLOT
);
7749 initial_got_entry
= (splt
->output_section
->vma
7750 + splt
->output_offset
);
7753 /* Fill in the entry in the global offset table. */
7754 bfd_put_32 (output_bfd
, initial_got_entry
,
7755 sgot
->contents
+ got_offset
);
7759 elf32_arm_add_dynreloc (output_bfd
, info
, srel
, &rel
);
7762 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
7763 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
7769 /* Some relocations map to different relocations depending on the
7770 target. Return the real relocation. */
7773 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
7779 if (globals
->target1_is_rel
)
7785 return globals
->target2_reloc
;
7792 /* Return the base VMA address which should be subtracted from real addresses
7793 when resolving @dtpoff relocation.
7794 This is PT_TLS segment p_vaddr. */
7797 dtpoff_base (struct bfd_link_info
*info
)
7799 /* If tls_sec is NULL, we should have signalled an error already. */
7800 if (elf_hash_table (info
)->tls_sec
== NULL
)
7802 return elf_hash_table (info
)->tls_sec
->vma
;
7805 /* Return the relocation value for @tpoff relocation
7806 if STT_TLS virtual address is ADDRESS. */
7809 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
7811 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7814 /* If tls_sec is NULL, we should have signalled an error already. */
7815 if (htab
->tls_sec
== NULL
)
7817 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
7818 return address
- htab
->tls_sec
->vma
+ base
;
7821 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
7822 VALUE is the relocation value. */
7824 static bfd_reloc_status_type
7825 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
7828 return bfd_reloc_overflow
;
7830 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
7831 bfd_put_32 (abfd
, value
, data
);
7832 return bfd_reloc_ok
;
7835 /* Handle TLS relaxations. Relaxing is possible for symbols that use
7836 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
7837 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
7839 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
7840 is to then call final_link_relocate. Return other values in the
7843 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
7844 the pre-relaxed code. It would be nice if the relocs were updated
7845 to match the optimization. */
7847 static bfd_reloc_status_type
7848 elf32_arm_tls_relax (struct elf32_arm_link_hash_table
*globals
,
7849 bfd
*input_bfd
, asection
*input_sec
, bfd_byte
*contents
,
7850 Elf_Internal_Rela
*rel
, unsigned long is_local
)
7854 switch (ELF32_R_TYPE (rel
->r_info
))
7857 return bfd_reloc_notsupported
;
7859 case R_ARM_TLS_GOTDESC
:
7864 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
7866 insn
-= 5; /* THUMB */
7868 insn
-= 8; /* ARM */
7870 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
7871 return bfd_reloc_continue
;
7873 case R_ARM_THM_TLS_DESCSEQ
:
7875 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
);
7876 if ((insn
& 0xff78) == 0x4478) /* add rx, pc */
7880 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7882 else if ((insn
& 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
7886 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7889 bfd_put_16 (input_bfd
, insn
& 0xf83f, contents
+ rel
->r_offset
);
7891 else if ((insn
& 0xff87) == 0x4780) /* blx rx */
7895 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
7898 bfd_put_16 (input_bfd
, 0x4600 | (insn
& 0x78),
7899 contents
+ rel
->r_offset
);
7903 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
7904 /* It's a 32 bit instruction, fetch the rest of it for
7905 error generation. */
7907 | bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 2);
7908 (*_bfd_error_handler
)
7909 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
7910 input_bfd
, input_sec
, (unsigned long)rel
->r_offset
, insn
);
7911 return bfd_reloc_notsupported
;
7915 case R_ARM_TLS_DESCSEQ
:
7917 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
7918 if ((insn
& 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
7922 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xffff),
7923 contents
+ rel
->r_offset
);
7925 else if ((insn
& 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
7929 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
7932 bfd_put_32 (input_bfd
, insn
& 0xfffff000,
7933 contents
+ rel
->r_offset
);
7935 else if ((insn
& 0xfffffff0) == 0xe12fff30) /* blx rx */
7939 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
7942 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xf),
7943 contents
+ rel
->r_offset
);
7947 (*_bfd_error_handler
)
7948 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
7949 input_bfd
, input_sec
, (unsigned long)rel
->r_offset
, insn
);
7950 return bfd_reloc_notsupported
;
7954 case R_ARM_TLS_CALL
:
7955 /* GD->IE relaxation, turn the instruction into 'nop' or
7956 'ldr r0, [pc,r0]' */
7957 insn
= is_local
? 0xe1a00000 : 0xe79f0000;
7958 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
7961 case R_ARM_THM_TLS_CALL
:
7962 /* GD->IE relaxation */
7964 /* add r0,pc; ldr r0, [r0] */
7966 else if (arch_has_thumb2_nop (globals
))
7973 bfd_put_16 (input_bfd
, insn
>> 16, contents
+ rel
->r_offset
);
7974 bfd_put_16 (input_bfd
, insn
& 0xffff, contents
+ rel
->r_offset
+ 2);
7977 return bfd_reloc_ok
;
7980 /* For a given value of n, calculate the value of G_n as required to
7981 deal with group relocations. We return it in the form of an
7982 encoded constant-and-rotation, together with the final residual. If n is
7983 specified as less than zero, then final_residual is filled with the
7984 input value and no further action is performed. */
7987 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
7991 bfd_vma encoded_g_n
= 0;
7992 bfd_vma residual
= value
; /* Also known as Y_n. */
7994 for (current_n
= 0; current_n
<= n
; current_n
++)
7998 /* Calculate which part of the value to mask. */
8005 /* Determine the most significant bit in the residual and
8006 align the resulting value to a 2-bit boundary. */
8007 for (msb
= 30; msb
>= 0; msb
-= 2)
8008 if (residual
& (3 << msb
))
8011 /* The desired shift is now (msb - 6), or zero, whichever
8018 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
8019 g_n
= residual
& (0xff << shift
);
8020 encoded_g_n
= (g_n
>> shift
)
8021 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
8023 /* Calculate the residual for the next time around. */
8027 *final_residual
= residual
;
8032 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
8033 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
8036 identify_add_or_sub (bfd_vma insn
)
8038 int opcode
= insn
& 0x1e00000;
8040 if (opcode
== 1 << 23) /* ADD */
8043 if (opcode
== 1 << 22) /* SUB */
8049 /* Perform a relocation as part of a final link. */
8051 static bfd_reloc_status_type
8052 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
8055 asection
* input_section
,
8056 bfd_byte
* contents
,
8057 Elf_Internal_Rela
* rel
,
8059 struct bfd_link_info
* info
,
8061 const char * sym_name
,
8062 unsigned char st_type
,
8063 enum arm_st_branch_type branch_type
,
8064 struct elf_link_hash_entry
* h
,
8065 bfd_boolean
* unresolved_reloc_p
,
8066 char ** error_message
)
8068 unsigned long r_type
= howto
->type
;
8069 unsigned long r_symndx
;
8070 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
8071 bfd_vma
* local_got_offsets
;
8072 bfd_vma
* local_tlsdesc_gotents
;
8075 asection
* sreloc
= NULL
;
8078 bfd_signed_vma signed_addend
;
8079 unsigned char dynreloc_st_type
;
8080 bfd_vma dynreloc_value
;
8081 struct elf32_arm_link_hash_table
* globals
;
8082 struct elf32_arm_link_hash_entry
*eh
;
8083 union gotplt_union
*root_plt
;
8084 struct arm_plt_info
*arm_plt
;
8086 bfd_vma gotplt_offset
;
8087 bfd_boolean has_iplt_entry
;
8089 globals
= elf32_arm_hash_table (info
);
8090 if (globals
== NULL
)
8091 return bfd_reloc_notsupported
;
8093 BFD_ASSERT (is_arm_elf (input_bfd
));
8095 /* Some relocation types map to different relocations depending on the
8096 target. We pick the right one here. */
8097 r_type
= arm_real_reloc_type (globals
, r_type
);
8099 /* It is possible to have linker relaxations on some TLS access
8100 models. Update our information here. */
8101 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
8103 if (r_type
!= howto
->type
)
8104 howto
= elf32_arm_howto_from_type (r_type
);
8106 /* If the start address has been set, then set the EF_ARM_HASENTRY
8107 flag. Setting this more than once is redundant, but the cost is
8108 not too high, and it keeps the code simple.
8110 The test is done here, rather than somewhere else, because the
8111 start address is only set just before the final link commences.
8113 Note - if the user deliberately sets a start address of 0, the
8114 flag will not be set. */
8115 if (bfd_get_start_address (output_bfd
) != 0)
8116 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
8118 eh
= (struct elf32_arm_link_hash_entry
*) h
;
8119 sgot
= globals
->root
.sgot
;
8120 local_got_offsets
= elf_local_got_offsets (input_bfd
);
8121 local_tlsdesc_gotents
= elf32_arm_local_tlsdesc_gotent (input_bfd
);
8123 if (globals
->root
.dynamic_sections_created
)
8124 srelgot
= globals
->root
.srelgot
;
8128 r_symndx
= ELF32_R_SYM (rel
->r_info
);
8130 if (globals
->use_rel
)
8132 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
8134 if (addend
& ((howto
->src_mask
+ 1) >> 1))
8137 signed_addend
&= ~ howto
->src_mask
;
8138 signed_addend
|= addend
;
8141 signed_addend
= addend
;
8144 addend
= signed_addend
= rel
->r_addend
;
8146 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
8147 are resolving a function call relocation. */
8148 if (using_thumb_only (globals
)
8149 && (r_type
== R_ARM_THM_CALL
8150 || r_type
== R_ARM_THM_JUMP24
)
8151 && branch_type
== ST_BRANCH_TO_ARM
)
8152 branch_type
= ST_BRANCH_TO_THUMB
;
8154 /* Record the symbol information that should be used in dynamic
8156 dynreloc_st_type
= st_type
;
8157 dynreloc_value
= value
;
8158 if (branch_type
== ST_BRANCH_TO_THUMB
)
8159 dynreloc_value
|= 1;
8161 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
8162 VALUE appropriately for relocations that we resolve at link time. */
8163 has_iplt_entry
= FALSE
;
8164 if (elf32_arm_get_plt_info (input_bfd
, eh
, r_symndx
, &root_plt
, &arm_plt
)
8165 && root_plt
->offset
!= (bfd_vma
) -1)
8167 plt_offset
= root_plt
->offset
;
8168 gotplt_offset
= arm_plt
->got_offset
;
8170 if (h
== NULL
|| eh
->is_iplt
)
8172 has_iplt_entry
= TRUE
;
8173 splt
= globals
->root
.iplt
;
8175 /* Populate .iplt entries here, because not all of them will
8176 be seen by finish_dynamic_symbol. The lower bit is set if
8177 we have already populated the entry. */
8182 if (elf32_arm_populate_plt_entry (output_bfd
, info
, root_plt
, arm_plt
,
8183 -1, dynreloc_value
))
8184 root_plt
->offset
|= 1;
8186 return bfd_reloc_notsupported
;
8189 /* Static relocations always resolve to the .iplt entry. */
8191 value
= (splt
->output_section
->vma
8192 + splt
->output_offset
8194 branch_type
= ST_BRANCH_TO_ARM
;
8196 /* If there are non-call relocations that resolve to the .iplt
8197 entry, then all dynamic ones must too. */
8198 if (arm_plt
->noncall_refcount
!= 0)
8200 dynreloc_st_type
= st_type
;
8201 dynreloc_value
= value
;
8205 /* We populate the .plt entry in finish_dynamic_symbol. */
8206 splt
= globals
->root
.splt
;
8211 plt_offset
= (bfd_vma
) -1;
8212 gotplt_offset
= (bfd_vma
) -1;
8218 /* We don't need to find a value for this symbol. It's just a
8220 *unresolved_reloc_p
= FALSE
;
8221 return bfd_reloc_ok
;
8224 if (!globals
->vxworks_p
)
8225 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
8229 case R_ARM_ABS32_NOI
:
8231 case R_ARM_REL32_NOI
:
8237 /* Handle relocations which should use the PLT entry. ABS32/REL32
8238 will use the symbol's value, which may point to a PLT entry, but we
8239 don't need to handle that here. If we created a PLT entry, all
8240 branches in this object should go to it, except if the PLT is too
8241 far away, in which case a long branch stub should be inserted. */
8242 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
8243 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
8244 && r_type
!= R_ARM_CALL
8245 && r_type
!= R_ARM_JUMP24
8246 && r_type
!= R_ARM_PLT32
)
8247 && plt_offset
!= (bfd_vma
) -1)
8249 /* If we've created a .plt section, and assigned a PLT entry
8250 to this function, it must either be a STT_GNU_IFUNC reference
8251 or not be known to bind locally. In other cases, we should
8252 have cleared the PLT entry by now. */
8253 BFD_ASSERT (has_iplt_entry
|| !SYMBOL_CALLS_LOCAL (info
, h
));
8255 value
= (splt
->output_section
->vma
8256 + splt
->output_offset
8258 *unresolved_reloc_p
= FALSE
;
8259 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8260 contents
, rel
->r_offset
, value
,
8264 /* When generating a shared object or relocatable executable, these
8265 relocations are copied into the output file to be resolved at
8267 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
8268 && (input_section
->flags
& SEC_ALLOC
)
8269 && !(globals
->vxworks_p
8270 && strcmp (input_section
->output_section
->name
,
8272 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
8273 || !SYMBOL_CALLS_LOCAL (info
, h
))
8274 && !(input_bfd
== globals
->stub_bfd
8275 && strstr (input_section
->name
, STUB_SUFFIX
))
8277 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8278 || h
->root
.type
!= bfd_link_hash_undefweak
)
8279 && r_type
!= R_ARM_PC24
8280 && r_type
!= R_ARM_CALL
8281 && r_type
!= R_ARM_JUMP24
8282 && r_type
!= R_ARM_PREL31
8283 && r_type
!= R_ARM_PLT32
)
8285 Elf_Internal_Rela outrel
;
8286 bfd_boolean skip
, relocate
;
8288 *unresolved_reloc_p
= FALSE
;
8290 if (sreloc
== NULL
&& globals
->root
.dynamic_sections_created
)
8292 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
8293 ! globals
->use_rel
);
8296 return bfd_reloc_notsupported
;
8302 outrel
.r_addend
= addend
;
8304 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
8306 if (outrel
.r_offset
== (bfd_vma
) -1)
8308 else if (outrel
.r_offset
== (bfd_vma
) -2)
8309 skip
= TRUE
, relocate
= TRUE
;
8310 outrel
.r_offset
+= (input_section
->output_section
->vma
8311 + input_section
->output_offset
);
8314 memset (&outrel
, 0, sizeof outrel
);
8319 || !h
->def_regular
))
8320 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
8325 /* This symbol is local, or marked to become local. */
8326 BFD_ASSERT (r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
);
8327 if (globals
->symbian_p
)
8331 /* On Symbian OS, the data segment and text segement
8332 can be relocated independently. Therefore, we
8333 must indicate the segment to which this
8334 relocation is relative. The BPABI allows us to
8335 use any symbol in the right segment; we just use
8336 the section symbol as it is convenient. (We
8337 cannot use the symbol given by "h" directly as it
8338 will not appear in the dynamic symbol table.)
8340 Note that the dynamic linker ignores the section
8341 symbol value, so we don't subtract osec->vma
8342 from the emitted reloc addend. */
8344 osec
= sym_sec
->output_section
;
8346 osec
= input_section
->output_section
;
8347 symbol
= elf_section_data (osec
)->dynindx
;
8350 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
8352 if ((osec
->flags
& SEC_READONLY
) == 0
8353 && htab
->data_index_section
!= NULL
)
8354 osec
= htab
->data_index_section
;
8356 osec
= htab
->text_index_section
;
8357 symbol
= elf_section_data (osec
)->dynindx
;
8359 BFD_ASSERT (symbol
!= 0);
8362 /* On SVR4-ish systems, the dynamic loader cannot
8363 relocate the text and data segments independently,
8364 so the symbol does not matter. */
8366 if (dynreloc_st_type
== STT_GNU_IFUNC
)
8367 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
8368 to the .iplt entry. Instead, every non-call reference
8369 must use an R_ARM_IRELATIVE relocation to obtain the
8370 correct run-time address. */
8371 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_IRELATIVE
);
8373 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
8374 if (globals
->use_rel
)
8377 outrel
.r_addend
+= dynreloc_value
;
8380 elf32_arm_add_dynreloc (output_bfd
, info
, sreloc
, &outrel
);
8382 /* If this reloc is against an external symbol, we do not want to
8383 fiddle with the addend. Otherwise, we need to include the symbol
8384 value so that it becomes an addend for the dynamic reloc. */
8386 return bfd_reloc_ok
;
8388 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
8389 contents
, rel
->r_offset
,
8390 dynreloc_value
, (bfd_vma
) 0);
8392 else switch (r_type
)
8395 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
8397 case R_ARM_XPC25
: /* Arm BLX instruction. */
8400 case R_ARM_PC24
: /* Arm B/BL instruction. */
8403 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
8405 if (r_type
== R_ARM_XPC25
)
8407 /* Check for Arm calling Arm function. */
8408 /* FIXME: Should we translate the instruction into a BL
8409 instruction instead ? */
8410 if (branch_type
!= ST_BRANCH_TO_THUMB
)
8411 (*_bfd_error_handler
)
8412 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
8414 h
? h
->root
.root
.string
: "(local)");
8416 else if (r_type
== R_ARM_PC24
)
8418 /* Check for Arm calling Thumb function. */
8419 if (branch_type
== ST_BRANCH_TO_THUMB
)
8421 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
8422 output_bfd
, input_section
,
8423 hit_data
, sym_sec
, rel
->r_offset
,
8424 signed_addend
, value
,
8426 return bfd_reloc_ok
;
8428 return bfd_reloc_dangerous
;
8432 /* Check if a stub has to be inserted because the
8433 destination is too far or we are changing mode. */
8434 if ( r_type
== R_ARM_CALL
8435 || r_type
== R_ARM_JUMP24
8436 || r_type
== R_ARM_PLT32
)
8438 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
8439 struct elf32_arm_link_hash_entry
*hash
;
8441 hash
= (struct elf32_arm_link_hash_entry
*) h
;
8442 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
8443 st_type
, &branch_type
,
8444 hash
, value
, sym_sec
,
8445 input_bfd
, sym_name
);
8447 if (stub_type
!= arm_stub_none
)
8449 /* The target is out of reach, so redirect the
8450 branch to the local stub for this function. */
8451 stub_entry
= elf32_arm_get_stub_entry (input_section
,
8456 if (stub_entry
!= NULL
)
8457 value
= (stub_entry
->stub_offset
8458 + stub_entry
->stub_sec
->output_offset
8459 + stub_entry
->stub_sec
->output_section
->vma
);
8461 if (plt_offset
!= (bfd_vma
) -1)
8462 *unresolved_reloc_p
= FALSE
;
8467 /* If the call goes through a PLT entry, make sure to
8468 check distance to the right destination address. */
8469 if (plt_offset
!= (bfd_vma
) -1)
8471 value
= (splt
->output_section
->vma
8472 + splt
->output_offset
8474 *unresolved_reloc_p
= FALSE
;
8475 /* The PLT entry is in ARM mode, regardless of the
8477 branch_type
= ST_BRANCH_TO_ARM
;
8482 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
8484 S is the address of the symbol in the relocation.
8485 P is address of the instruction being relocated.
8486 A is the addend (extracted from the instruction) in bytes.
8488 S is held in 'value'.
8489 P is the base address of the section containing the
8490 instruction plus the offset of the reloc into that
8492 (input_section->output_section->vma +
8493 input_section->output_offset +
8495 A is the addend, converted into bytes, ie:
8498 Note: None of these operations have knowledge of the pipeline
8499 size of the processor, thus it is up to the assembler to
8500 encode this information into the addend. */
8501 value
-= (input_section
->output_section
->vma
8502 + input_section
->output_offset
);
8503 value
-= rel
->r_offset
;
8504 if (globals
->use_rel
)
8505 value
+= (signed_addend
<< howto
->size
);
8507 /* RELA addends do not have to be adjusted by howto->size. */
8508 value
+= signed_addend
;
8510 signed_addend
= value
;
8511 signed_addend
>>= howto
->rightshift
;
8513 /* A branch to an undefined weak symbol is turned into a jump to
8514 the next instruction unless a PLT entry will be created.
8515 Do the same for local undefined symbols (but not for STN_UNDEF).
8516 The jump to the next instruction is optimized as a NOP depending
8517 on the architecture. */
8518 if (h
? (h
->root
.type
== bfd_link_hash_undefweak
8519 && plt_offset
== (bfd_vma
) -1)
8520 : r_symndx
!= STN_UNDEF
&& bfd_is_und_section (sym_sec
))
8522 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000);
8524 if (arch_has_arm_nop (globals
))
8525 value
|= 0x0320f000;
8527 value
|= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
8531 /* Perform a signed range check. */
8532 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
8533 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
8534 return bfd_reloc_overflow
;
8536 addend
= (value
& 2);
8538 value
= (signed_addend
& howto
->dst_mask
)
8539 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
8541 if (r_type
== R_ARM_CALL
)
8543 /* Set the H bit in the BLX instruction. */
8544 if (branch_type
== ST_BRANCH_TO_THUMB
)
8549 value
&= ~(bfd_vma
)(1 << 24);
8552 /* Select the correct instruction (BL or BLX). */
8553 /* Only if we are not handling a BL to a stub. In this
8554 case, mode switching is performed by the stub. */
8555 if (branch_type
== ST_BRANCH_TO_THUMB
&& !stub_entry
)
8557 else if (stub_entry
|| branch_type
!= ST_BRANCH_UNKNOWN
)
8559 value
&= ~(bfd_vma
)(1 << 28);
8569 if (branch_type
== ST_BRANCH_TO_THUMB
)
8573 case R_ARM_ABS32_NOI
:
8579 if (branch_type
== ST_BRANCH_TO_THUMB
)
8581 value
-= (input_section
->output_section
->vma
8582 + input_section
->output_offset
+ rel
->r_offset
);
8585 case R_ARM_REL32_NOI
:
8587 value
-= (input_section
->output_section
->vma
8588 + input_section
->output_offset
+ rel
->r_offset
);
8592 value
-= (input_section
->output_section
->vma
8593 + input_section
->output_offset
+ rel
->r_offset
);
8594 value
+= signed_addend
;
8595 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
8597 /* Check for overflow. */
8598 if ((value
^ (value
>> 1)) & (1 << 30))
8599 return bfd_reloc_overflow
;
8601 value
&= 0x7fffffff;
8602 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
8603 if (branch_type
== ST_BRANCH_TO_THUMB
)
8608 bfd_put_32 (input_bfd
, value
, hit_data
);
8609 return bfd_reloc_ok
;
8612 /* PR 16202: Refectch the addend using the correct size. */
8613 if (globals
->use_rel
)
8614 addend
= bfd_get_8 (input_bfd
, hit_data
);
8617 /* There is no way to tell whether the user intended to use a signed or
8618 unsigned addend. When checking for overflow we accept either,
8619 as specified by the AAELF. */
8620 if ((long) value
> 0xff || (long) value
< -0x80)
8621 return bfd_reloc_overflow
;
8623 bfd_put_8 (input_bfd
, value
, hit_data
);
8624 return bfd_reloc_ok
;
8627 /* PR 16202: Refectch the addend using the correct size. */
8628 if (globals
->use_rel
)
8629 addend
= bfd_get_16 (input_bfd
, hit_data
);
8632 /* See comment for R_ARM_ABS8. */
8633 if ((long) value
> 0xffff || (long) value
< -0x8000)
8634 return bfd_reloc_overflow
;
8636 bfd_put_16 (input_bfd
, value
, hit_data
);
8637 return bfd_reloc_ok
;
8639 case R_ARM_THM_ABS5
:
8640 /* Support ldr and str instructions for the thumb. */
8641 if (globals
->use_rel
)
8643 /* Need to refetch addend. */
8644 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
8645 /* ??? Need to determine shift amount from operand size. */
8646 addend
>>= howto
->rightshift
;
8650 /* ??? Isn't value unsigned? */
8651 if ((long) value
> 0x1f || (long) value
< -0x10)
8652 return bfd_reloc_overflow
;
8654 /* ??? Value needs to be properly shifted into place first. */
8655 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
8656 bfd_put_16 (input_bfd
, value
, hit_data
);
8657 return bfd_reloc_ok
;
8659 case R_ARM_THM_ALU_PREL_11_0
:
8660 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
8663 bfd_signed_vma relocation
;
8665 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
8666 | bfd_get_16 (input_bfd
, hit_data
+ 2);
8668 if (globals
->use_rel
)
8670 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
8671 | ((insn
& (1 << 26)) >> 15);
8672 if (insn
& 0xf00000)
8673 signed_addend
= -signed_addend
;
8676 relocation
= value
+ signed_addend
;
8677 relocation
-= Pa (input_section
->output_section
->vma
8678 + input_section
->output_offset
8681 value
= abs (relocation
);
8683 if (value
>= 0x1000)
8684 return bfd_reloc_overflow
;
8686 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
8687 | ((value
& 0x700) << 4)
8688 | ((value
& 0x800) << 15);
8692 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8693 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8695 return bfd_reloc_ok
;
8699 /* PR 10073: This reloc is not generated by the GNU toolchain,
8700 but it is supported for compatibility with third party libraries
8701 generated by other compilers, specifically the ARM/IAR. */
8704 bfd_signed_vma relocation
;
8706 insn
= bfd_get_16 (input_bfd
, hit_data
);
8708 if (globals
->use_rel
)
8709 addend
= ((((insn
& 0x00ff) << 2) + 4) & 0x3ff) -4;
8711 relocation
= value
+ addend
;
8712 relocation
-= Pa (input_section
->output_section
->vma
8713 + input_section
->output_offset
8716 value
= abs (relocation
);
8718 /* We do not check for overflow of this reloc. Although strictly
8719 speaking this is incorrect, it appears to be necessary in order
8720 to work with IAR generated relocs. Since GCC and GAS do not
8721 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
8722 a problem for them. */
8725 insn
= (insn
& 0xff00) | (value
>> 2);
8727 bfd_put_16 (input_bfd
, insn
, hit_data
);
8729 return bfd_reloc_ok
;
8732 case R_ARM_THM_PC12
:
8733 /* Corresponds to: ldr.w reg, [pc, #offset]. */
8736 bfd_signed_vma relocation
;
8738 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
8739 | bfd_get_16 (input_bfd
, hit_data
+ 2);
8741 if (globals
->use_rel
)
8743 signed_addend
= insn
& 0xfff;
8744 if (!(insn
& (1 << 23)))
8745 signed_addend
= -signed_addend
;
8748 relocation
= value
+ signed_addend
;
8749 relocation
-= Pa (input_section
->output_section
->vma
8750 + input_section
->output_offset
8753 value
= abs (relocation
);
8755 if (value
>= 0x1000)
8756 return bfd_reloc_overflow
;
8758 insn
= (insn
& 0xff7ff000) | value
;
8759 if (relocation
>= 0)
8762 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
8763 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
8765 return bfd_reloc_ok
;
8768 case R_ARM_THM_XPC22
:
8769 case R_ARM_THM_CALL
:
8770 case R_ARM_THM_JUMP24
:
8771 /* Thumb BL (branch long instruction). */
8775 bfd_boolean overflow
= FALSE
;
8776 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
8777 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
8778 bfd_signed_vma reloc_signed_max
;
8779 bfd_signed_vma reloc_signed_min
;
8781 bfd_signed_vma signed_check
;
8783 const int thumb2
= using_thumb2 (globals
);
8785 /* A branch to an undefined weak symbol is turned into a jump to
8786 the next instruction unless a PLT entry will be created.
8787 The jump to the next instruction is optimized as a NOP.W for
8788 Thumb-2 enabled architectures. */
8789 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
8790 && plt_offset
== (bfd_vma
) -1)
8792 if (arch_has_thumb2_nop (globals
))
8794 bfd_put_16 (input_bfd
, 0xf3af, hit_data
);
8795 bfd_put_16 (input_bfd
, 0x8000, hit_data
+ 2);
8799 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
8800 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
8802 return bfd_reloc_ok
;
8805 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
8806 with Thumb-1) involving the J1 and J2 bits. */
8807 if (globals
->use_rel
)
8809 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
8810 bfd_vma upper
= upper_insn
& 0x3ff;
8811 bfd_vma lower
= lower_insn
& 0x7ff;
8812 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
8813 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
8814 bfd_vma i1
= j1
^ s
? 0 : 1;
8815 bfd_vma i2
= j2
^ s
? 0 : 1;
8817 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
8819 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
8821 signed_addend
= addend
;
8824 if (r_type
== R_ARM_THM_XPC22
)
8826 /* Check for Thumb to Thumb call. */
8827 /* FIXME: Should we translate the instruction into a BL
8828 instruction instead ? */
8829 if (branch_type
== ST_BRANCH_TO_THUMB
)
8830 (*_bfd_error_handler
)
8831 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
8833 h
? h
->root
.root
.string
: "(local)");
8837 /* If it is not a call to Thumb, assume call to Arm.
8838 If it is a call relative to a section name, then it is not a
8839 function call at all, but rather a long jump. Calls through
8840 the PLT do not require stubs. */
8841 if (branch_type
== ST_BRANCH_TO_ARM
&& plt_offset
== (bfd_vma
) -1)
8843 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
8845 /* Convert BL to BLX. */
8846 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8848 else if (( r_type
!= R_ARM_THM_CALL
)
8849 && (r_type
!= R_ARM_THM_JUMP24
))
8851 if (elf32_thumb_to_arm_stub
8852 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
8853 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
8855 return bfd_reloc_ok
;
8857 return bfd_reloc_dangerous
;
8860 else if (branch_type
== ST_BRANCH_TO_THUMB
8862 && r_type
== R_ARM_THM_CALL
)
8864 /* Make sure this is a BL. */
8865 lower_insn
|= 0x1800;
8869 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
8870 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
8872 /* Check if a stub has to be inserted because the destination
8874 struct elf32_arm_stub_hash_entry
*stub_entry
;
8875 struct elf32_arm_link_hash_entry
*hash
;
8877 hash
= (struct elf32_arm_link_hash_entry
*) h
;
8879 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
8880 st_type
, &branch_type
,
8881 hash
, value
, sym_sec
,
8882 input_bfd
, sym_name
);
8884 if (stub_type
!= arm_stub_none
)
8886 /* The target is out of reach or we are changing modes, so
8887 redirect the branch to the local stub for this
8889 stub_entry
= elf32_arm_get_stub_entry (input_section
,
8893 if (stub_entry
!= NULL
)
8895 value
= (stub_entry
->stub_offset
8896 + stub_entry
->stub_sec
->output_offset
8897 + stub_entry
->stub_sec
->output_section
->vma
);
8899 if (plt_offset
!= (bfd_vma
) -1)
8900 *unresolved_reloc_p
= FALSE
;
8903 /* If this call becomes a call to Arm, force BLX. */
8904 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
8907 && !arm_stub_is_thumb (stub_entry
->stub_type
))
8908 || branch_type
!= ST_BRANCH_TO_THUMB
)
8909 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8914 /* Handle calls via the PLT. */
8915 if (stub_type
== arm_stub_none
&& plt_offset
!= (bfd_vma
) -1)
8917 value
= (splt
->output_section
->vma
8918 + splt
->output_offset
8921 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
8923 /* If the Thumb BLX instruction is available, convert
8924 the BL to a BLX instruction to call the ARM-mode
8926 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
8927 branch_type
= ST_BRANCH_TO_ARM
;
8931 /* Target the Thumb stub before the ARM PLT entry. */
8932 value
-= PLT_THUMB_STUB_SIZE
;
8933 branch_type
= ST_BRANCH_TO_THUMB
;
8935 *unresolved_reloc_p
= FALSE
;
8938 relocation
= value
+ signed_addend
;
8940 relocation
-= (input_section
->output_section
->vma
8941 + input_section
->output_offset
8944 check
= relocation
>> howto
->rightshift
;
8946 /* If this is a signed value, the rightshift just dropped
8947 leading 1 bits (assuming twos complement). */
8948 if ((bfd_signed_vma
) relocation
>= 0)
8949 signed_check
= check
;
8951 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
8953 /* Calculate the permissable maximum and minimum values for
8954 this relocation according to whether we're relocating for
8956 bitsize
= howto
->bitsize
;
8959 reloc_signed_max
= (1 << (bitsize
- 1)) - 1;
8960 reloc_signed_min
= ~reloc_signed_max
;
8962 /* Assumes two's complement. */
8963 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
8966 if ((lower_insn
& 0x5000) == 0x4000)
8967 /* For a BLX instruction, make sure that the relocation is rounded up
8968 to a word boundary. This follows the semantics of the instruction
8969 which specifies that bit 1 of the target address will come from bit
8970 1 of the base address. */
8971 relocation
= (relocation
+ 2) & ~ 3;
8973 /* Put RELOCATION back into the insn. Assumes two's complement.
8974 We use the Thumb-2 encoding, which is safe even if dealing with
8975 a Thumb-1 instruction by virtue of our overflow check above. */
8976 reloc_sign
= (signed_check
< 0) ? 1 : 0;
8977 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
8978 | ((relocation
>> 12) & 0x3ff)
8979 | (reloc_sign
<< 10);
8980 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
8981 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
8982 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
8983 | ((relocation
>> 1) & 0x7ff);
8985 /* Put the relocated value back in the object file: */
8986 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
8987 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
8989 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
8993 case R_ARM_THM_JUMP19
:
8994 /* Thumb32 conditional branch instruction. */
8997 bfd_boolean overflow
= FALSE
;
8998 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
8999 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
9000 bfd_signed_vma reloc_signed_max
= 0xffffe;
9001 bfd_signed_vma reloc_signed_min
= -0x100000;
9002 bfd_signed_vma signed_check
;
9004 /* Need to refetch the addend, reconstruct the top three bits,
9005 and squish the two 11 bit pieces together. */
9006 if (globals
->use_rel
)
9008 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
9009 bfd_vma upper
= (upper_insn
& 0x003f);
9010 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
9011 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
9012 bfd_vma lower
= (lower_insn
& 0x07ff);
9017 upper
-= 0x0100; /* Sign extend. */
9019 addend
= (upper
<< 12) | (lower
<< 1);
9020 signed_addend
= addend
;
9023 /* Handle calls via the PLT. */
9024 if (plt_offset
!= (bfd_vma
) -1)
9026 value
= (splt
->output_section
->vma
9027 + splt
->output_offset
9029 /* Target the Thumb stub before the ARM PLT entry. */
9030 value
-= PLT_THUMB_STUB_SIZE
;
9031 *unresolved_reloc_p
= FALSE
;
9034 /* ??? Should handle interworking? GCC might someday try to
9035 use this for tail calls. */
9037 relocation
= value
+ signed_addend
;
9038 relocation
-= (input_section
->output_section
->vma
9039 + input_section
->output_offset
9041 signed_check
= (bfd_signed_vma
) relocation
;
9043 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
9046 /* Put RELOCATION back into the insn. */
9048 bfd_vma S
= (relocation
& 0x00100000) >> 20;
9049 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
9050 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
9051 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
9052 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
9054 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
9055 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
9058 /* Put the relocated value back in the object file: */
9059 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
9060 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
9062 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
9065 case R_ARM_THM_JUMP11
:
9066 case R_ARM_THM_JUMP8
:
9067 case R_ARM_THM_JUMP6
:
9068 /* Thumb B (branch) instruction). */
9070 bfd_signed_vma relocation
;
9071 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
9072 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
9073 bfd_signed_vma signed_check
;
9075 /* CZB cannot jump backward. */
9076 if (r_type
== R_ARM_THM_JUMP6
)
9077 reloc_signed_min
= 0;
9079 if (globals
->use_rel
)
9081 /* Need to refetch addend. */
9082 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
9083 if (addend
& ((howto
->src_mask
+ 1) >> 1))
9086 signed_addend
&= ~ howto
->src_mask
;
9087 signed_addend
|= addend
;
9090 signed_addend
= addend
;
9091 /* The value in the insn has been right shifted. We need to
9092 undo this, so that we can perform the address calculation
9093 in terms of bytes. */
9094 signed_addend
<<= howto
->rightshift
;
9096 relocation
= value
+ signed_addend
;
9098 relocation
-= (input_section
->output_section
->vma
9099 + input_section
->output_offset
9102 relocation
>>= howto
->rightshift
;
9103 signed_check
= relocation
;
9105 if (r_type
== R_ARM_THM_JUMP6
)
9106 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
9108 relocation
&= howto
->dst_mask
;
9109 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
9111 bfd_put_16 (input_bfd
, relocation
, hit_data
);
9113 /* Assumes two's complement. */
9114 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
9115 return bfd_reloc_overflow
;
9117 return bfd_reloc_ok
;
9120 case R_ARM_ALU_PCREL7_0
:
9121 case R_ARM_ALU_PCREL15_8
:
9122 case R_ARM_ALU_PCREL23_15
:
9127 insn
= bfd_get_32 (input_bfd
, hit_data
);
9128 if (globals
->use_rel
)
9130 /* Extract the addend. */
9131 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
9132 signed_addend
= addend
;
9134 relocation
= value
+ signed_addend
;
9136 relocation
-= (input_section
->output_section
->vma
9137 + input_section
->output_offset
9139 insn
= (insn
& ~0xfff)
9140 | ((howto
->bitpos
<< 7) & 0xf00)
9141 | ((relocation
>> howto
->bitpos
) & 0xff);
9142 bfd_put_32 (input_bfd
, value
, hit_data
);
9144 return bfd_reloc_ok
;
9146 case R_ARM_GNU_VTINHERIT
:
9147 case R_ARM_GNU_VTENTRY
:
9148 return bfd_reloc_ok
;
9150 case R_ARM_GOTOFF32
:
9151 /* Relocation is relative to the start of the
9152 global offset table. */
9154 BFD_ASSERT (sgot
!= NULL
);
9156 return bfd_reloc_notsupported
;
9158 /* If we are addressing a Thumb function, we need to adjust the
9159 address by one, so that attempts to call the function pointer will
9160 correctly interpret it as Thumb code. */
9161 if (branch_type
== ST_BRANCH_TO_THUMB
)
9164 /* Note that sgot->output_offset is not involved in this
9165 calculation. We always want the start of .got. If we
9166 define _GLOBAL_OFFSET_TABLE in a different way, as is
9167 permitted by the ABI, we might have to change this
9169 value
-= sgot
->output_section
->vma
;
9170 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9171 contents
, rel
->r_offset
, value
,
9175 /* Use global offset table as symbol value. */
9176 BFD_ASSERT (sgot
!= NULL
);
9179 return bfd_reloc_notsupported
;
9181 *unresolved_reloc_p
= FALSE
;
9182 value
= sgot
->output_section
->vma
;
9183 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9184 contents
, rel
->r_offset
, value
,
9188 case R_ARM_GOT_PREL
:
9189 /* Relocation is to the entry for this symbol in the
9190 global offset table. */
9192 return bfd_reloc_notsupported
;
9194 if (dynreloc_st_type
== STT_GNU_IFUNC
9195 && plt_offset
!= (bfd_vma
) -1
9196 && (h
== NULL
|| SYMBOL_REFERENCES_LOCAL (info
, h
)))
9198 /* We have a relocation against a locally-binding STT_GNU_IFUNC
9199 symbol, and the relocation resolves directly to the runtime
9200 target rather than to the .iplt entry. This means that any
9201 .got entry would be the same value as the .igot.plt entry,
9202 so there's no point creating both. */
9203 sgot
= globals
->root
.igotplt
;
9204 value
= sgot
->output_offset
+ gotplt_offset
;
9210 off
= h
->got
.offset
;
9211 BFD_ASSERT (off
!= (bfd_vma
) -1);
9214 /* We have already processsed one GOT relocation against
9217 if (globals
->root
.dynamic_sections_created
9218 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
9219 *unresolved_reloc_p
= FALSE
;
9223 Elf_Internal_Rela outrel
;
9225 if (h
->dynindx
!= -1 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
9227 /* If the symbol doesn't resolve locally in a static
9228 object, we have an undefined reference. If the
9229 symbol doesn't resolve locally in a dynamic object,
9230 it should be resolved by the dynamic linker. */
9231 if (globals
->root
.dynamic_sections_created
)
9233 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
9234 *unresolved_reloc_p
= FALSE
;
9238 outrel
.r_addend
= 0;
9242 if (dynreloc_st_type
== STT_GNU_IFUNC
)
9243 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9244 else if (info
->shared
&&
9245 (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
9246 || h
->root
.type
!= bfd_link_hash_undefweak
))
9247 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
9250 outrel
.r_addend
= dynreloc_value
;
9253 /* The GOT entry is initialized to zero by default.
9254 See if we should install a different value. */
9255 if (outrel
.r_addend
!= 0
9256 && (outrel
.r_info
== 0 || globals
->use_rel
))
9258 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9259 sgot
->contents
+ off
);
9260 outrel
.r_addend
= 0;
9263 if (outrel
.r_info
!= 0)
9265 outrel
.r_offset
= (sgot
->output_section
->vma
9266 + sgot
->output_offset
9268 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9272 value
= sgot
->output_offset
+ off
;
9278 BFD_ASSERT (local_got_offsets
!= NULL
&&
9279 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
9281 off
= local_got_offsets
[r_symndx
];
9283 /* The offset must always be a multiple of 4. We use the
9284 least significant bit to record whether we have already
9285 generated the necessary reloc. */
9290 if (globals
->use_rel
)
9291 bfd_put_32 (output_bfd
, dynreloc_value
, sgot
->contents
+ off
);
9293 if (info
->shared
|| dynreloc_st_type
== STT_GNU_IFUNC
)
9295 Elf_Internal_Rela outrel
;
9297 outrel
.r_addend
= addend
+ dynreloc_value
;
9298 outrel
.r_offset
= (sgot
->output_section
->vma
9299 + sgot
->output_offset
9301 if (dynreloc_st_type
== STT_GNU_IFUNC
)
9302 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9304 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
9305 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9308 local_got_offsets
[r_symndx
] |= 1;
9311 value
= sgot
->output_offset
+ off
;
9313 if (r_type
!= R_ARM_GOT32
)
9314 value
+= sgot
->output_section
->vma
;
9316 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9317 contents
, rel
->r_offset
, value
,
9320 case R_ARM_TLS_LDO32
:
9321 value
= value
- dtpoff_base (info
);
9323 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9324 contents
, rel
->r_offset
, value
,
9327 case R_ARM_TLS_LDM32
:
9334 off
= globals
->tls_ldm_got
.offset
;
9340 /* If we don't know the module number, create a relocation
9344 Elf_Internal_Rela outrel
;
9346 if (srelgot
== NULL
)
9349 outrel
.r_addend
= 0;
9350 outrel
.r_offset
= (sgot
->output_section
->vma
9351 + sgot
->output_offset
+ off
);
9352 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
9354 if (globals
->use_rel
)
9355 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9356 sgot
->contents
+ off
);
9358 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9361 bfd_put_32 (output_bfd
, 1, sgot
->contents
+ off
);
9363 globals
->tls_ldm_got
.offset
|= 1;
9366 value
= sgot
->output_section
->vma
+ sgot
->output_offset
+ off
9367 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
9369 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9370 contents
, rel
->r_offset
, value
,
9374 case R_ARM_TLS_CALL
:
9375 case R_ARM_THM_TLS_CALL
:
9376 case R_ARM_TLS_GD32
:
9377 case R_ARM_TLS_IE32
:
9378 case R_ARM_TLS_GOTDESC
:
9379 case R_ARM_TLS_DESCSEQ
:
9380 case R_ARM_THM_TLS_DESCSEQ
:
9382 bfd_vma off
, offplt
;
9386 BFD_ASSERT (sgot
!= NULL
);
9391 dyn
= globals
->root
.dynamic_sections_created
;
9392 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
9394 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
9396 *unresolved_reloc_p
= FALSE
;
9399 off
= h
->got
.offset
;
9400 offplt
= elf32_arm_hash_entry (h
)->tlsdesc_got
;
9401 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
9405 BFD_ASSERT (local_got_offsets
!= NULL
);
9406 off
= local_got_offsets
[r_symndx
];
9407 offplt
= local_tlsdesc_gotents
[r_symndx
];
9408 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
9411 /* Linker relaxations happens from one of the
9412 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
9413 if (ELF32_R_TYPE(rel
->r_info
) != r_type
)
9414 tls_type
= GOT_TLS_IE
;
9416 BFD_ASSERT (tls_type
!= GOT_UNKNOWN
);
9422 bfd_boolean need_relocs
= FALSE
;
9423 Elf_Internal_Rela outrel
;
9426 /* The GOT entries have not been initialized yet. Do it
9427 now, and emit any relocations. If both an IE GOT and a
9428 GD GOT are necessary, we emit the GD first. */
9430 if ((info
->shared
|| indx
!= 0)
9432 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
9433 || h
->root
.type
!= bfd_link_hash_undefweak
))
9436 BFD_ASSERT (srelgot
!= NULL
);
9439 if (tls_type
& GOT_TLS_GDESC
)
9443 /* We should have relaxed, unless this is an undefined
9445 BFD_ASSERT ((h
&& (h
->root
.type
== bfd_link_hash_undefweak
))
9447 BFD_ASSERT (globals
->sgotplt_jump_table_size
+ offplt
+ 8
9448 <= globals
->root
.sgotplt
->size
);
9450 outrel
.r_addend
= 0;
9451 outrel
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
9452 + globals
->root
.sgotplt
->output_offset
9454 + globals
->sgotplt_jump_table_size
);
9456 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DESC
);
9457 sreloc
= globals
->root
.srelplt
;
9458 loc
= sreloc
->contents
;
9459 loc
+= globals
->next_tls_desc_index
++ * RELOC_SIZE (globals
);
9460 BFD_ASSERT (loc
+ RELOC_SIZE (globals
)
9461 <= sreloc
->contents
+ sreloc
->size
);
9463 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
9465 /* For globals, the first word in the relocation gets
9466 the relocation index and the top bit set, or zero,
9467 if we're binding now. For locals, it gets the
9468 symbol's offset in the tls section. */
9469 bfd_put_32 (output_bfd
,
9470 !h
? value
- elf_hash_table (info
)->tls_sec
->vma
9471 : info
->flags
& DF_BIND_NOW
? 0
9472 : 0x80000000 | ELF32_R_SYM (outrel
.r_info
),
9473 globals
->root
.sgotplt
->contents
+ offplt
9474 + globals
->sgotplt_jump_table_size
);
9476 /* Second word in the relocation is always zero. */
9477 bfd_put_32 (output_bfd
, 0,
9478 globals
->root
.sgotplt
->contents
+ offplt
9479 + globals
->sgotplt_jump_table_size
+ 4);
9481 if (tls_type
& GOT_TLS_GD
)
9485 outrel
.r_addend
= 0;
9486 outrel
.r_offset
= (sgot
->output_section
->vma
9487 + sgot
->output_offset
9489 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
9491 if (globals
->use_rel
)
9492 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9493 sgot
->contents
+ cur_off
);
9495 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9498 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
9499 sgot
->contents
+ cur_off
+ 4);
9502 outrel
.r_addend
= 0;
9503 outrel
.r_info
= ELF32_R_INFO (indx
,
9504 R_ARM_TLS_DTPOFF32
);
9505 outrel
.r_offset
+= 4;
9507 if (globals
->use_rel
)
9508 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9509 sgot
->contents
+ cur_off
+ 4);
9511 elf32_arm_add_dynreloc (output_bfd
, info
,
9517 /* If we are not emitting relocations for a
9518 general dynamic reference, then we must be in a
9519 static link or an executable link with the
9520 symbol binding locally. Mark it as belonging
9521 to module 1, the executable. */
9522 bfd_put_32 (output_bfd
, 1,
9523 sgot
->contents
+ cur_off
);
9524 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
9525 sgot
->contents
+ cur_off
+ 4);
9531 if (tls_type
& GOT_TLS_IE
)
9536 outrel
.r_addend
= value
- dtpoff_base (info
);
9538 outrel
.r_addend
= 0;
9539 outrel
.r_offset
= (sgot
->output_section
->vma
9540 + sgot
->output_offset
9542 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
9544 if (globals
->use_rel
)
9545 bfd_put_32 (output_bfd
, outrel
.r_addend
,
9546 sgot
->contents
+ cur_off
);
9548 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
9551 bfd_put_32 (output_bfd
, tpoff (info
, value
),
9552 sgot
->contents
+ cur_off
);
9559 local_got_offsets
[r_symndx
] |= 1;
9562 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
9564 else if (tls_type
& GOT_TLS_GDESC
)
9567 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
9568 || ELF32_R_TYPE(rel
->r_info
) == R_ARM_THM_TLS_CALL
)
9570 bfd_signed_vma offset
;
9571 /* TLS stubs are arm mode. The original symbol is a
9572 data object, so branch_type is bogus. */
9573 branch_type
= ST_BRANCH_TO_ARM
;
9574 enum elf32_arm_stub_type stub_type
9575 = arm_type_of_stub (info
, input_section
, rel
,
9576 st_type
, &branch_type
,
9577 (struct elf32_arm_link_hash_entry
*)h
,
9578 globals
->tls_trampoline
, globals
->root
.splt
,
9579 input_bfd
, sym_name
);
9581 if (stub_type
!= arm_stub_none
)
9583 struct elf32_arm_stub_hash_entry
*stub_entry
9584 = elf32_arm_get_stub_entry
9585 (input_section
, globals
->root
.splt
, 0, rel
,
9586 globals
, stub_type
);
9587 offset
= (stub_entry
->stub_offset
9588 + stub_entry
->stub_sec
->output_offset
9589 + stub_entry
->stub_sec
->output_section
->vma
);
9592 offset
= (globals
->root
.splt
->output_section
->vma
9593 + globals
->root
.splt
->output_offset
9594 + globals
->tls_trampoline
);
9596 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
)
9600 offset
-= (input_section
->output_section
->vma
9601 + input_section
->output_offset
9602 + rel
->r_offset
+ 8);
9606 value
= inst
| (globals
->use_blx
? 0xfa000000 : 0xeb000000);
9610 /* Thumb blx encodes the offset in a complicated
9612 unsigned upper_insn
, lower_insn
;
9615 offset
-= (input_section
->output_section
->vma
9616 + input_section
->output_offset
9617 + rel
->r_offset
+ 4);
9619 if (stub_type
!= arm_stub_none
9620 && arm_stub_is_thumb (stub_type
))
9622 lower_insn
= 0xd000;
9626 lower_insn
= 0xc000;
9627 /* Round up the offset to a word boundary */
9628 offset
= (offset
+ 2) & ~2;
9632 upper_insn
= (0xf000
9633 | ((offset
>> 12) & 0x3ff)
9635 lower_insn
|= (((!((offset
>> 23) & 1)) ^ neg
) << 13)
9636 | (((!((offset
>> 22) & 1)) ^ neg
) << 11)
9637 | ((offset
>> 1) & 0x7ff);
9638 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
9639 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
9640 return bfd_reloc_ok
;
9643 /* These relocations needs special care, as besides the fact
9644 they point somewhere in .gotplt, the addend must be
9645 adjusted accordingly depending on the type of instruction
9647 else if ((r_type
== R_ARM_TLS_GOTDESC
) && (tls_type
& GOT_TLS_GDESC
))
9649 unsigned long data
, insn
;
9652 data
= bfd_get_32 (input_bfd
, hit_data
);
9658 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
- data
);
9659 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
9661 | bfd_get_16 (input_bfd
,
9662 contents
+ rel
->r_offset
- data
+ 2);
9663 if ((insn
& 0xf800c000) == 0xf000c000)
9666 else if ((insn
& 0xffffff00) == 0x4400)
9671 (*_bfd_error_handler
)
9672 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
9673 input_bfd
, input_section
,
9674 (unsigned long)rel
->r_offset
, insn
);
9675 return bfd_reloc_notsupported
;
9680 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
- data
);
9685 case 0xfa: /* blx */
9689 case 0xe0: /* add */
9694 (*_bfd_error_handler
)
9695 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
9696 input_bfd
, input_section
,
9697 (unsigned long)rel
->r_offset
, insn
);
9698 return bfd_reloc_notsupported
;
9702 value
+= ((globals
->root
.sgotplt
->output_section
->vma
9703 + globals
->root
.sgotplt
->output_offset
+ off
)
9704 - (input_section
->output_section
->vma
9705 + input_section
->output_offset
9707 + globals
->sgotplt_jump_table_size
);
9710 value
= ((globals
->root
.sgot
->output_section
->vma
9711 + globals
->root
.sgot
->output_offset
+ off
)
9712 - (input_section
->output_section
->vma
9713 + input_section
->output_offset
+ rel
->r_offset
));
9715 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9716 contents
, rel
->r_offset
, value
,
9720 case R_ARM_TLS_LE32
:
9721 if (info
->shared
&& !info
->pie
)
9723 (*_bfd_error_handler
)
9724 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
9725 input_bfd
, input_section
,
9726 (long) rel
->r_offset
, howto
->name
);
9727 return bfd_reloc_notsupported
;
9730 value
= tpoff (info
, value
);
9732 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
9733 contents
, rel
->r_offset
, value
,
9737 if (globals
->fix_v4bx
)
9739 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9741 /* Ensure that we have a BX instruction. */
9742 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
9744 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
9746 /* Branch to veneer. */
9748 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
9749 glue_addr
-= input_section
->output_section
->vma
9750 + input_section
->output_offset
9751 + rel
->r_offset
+ 8;
9752 insn
= (insn
& 0xf0000000) | 0x0a000000
9753 | ((glue_addr
>> 2) & 0x00ffffff);
9757 /* Preserve Rm (lowest four bits) and the condition code
9758 (highest four bits). Other bits encode MOV PC,Rm. */
9759 insn
= (insn
& 0xf000000f) | 0x01a0f000;
9762 bfd_put_32 (input_bfd
, insn
, hit_data
);
9764 return bfd_reloc_ok
;
9766 case R_ARM_MOVW_ABS_NC
:
9767 case R_ARM_MOVT_ABS
:
9768 case R_ARM_MOVW_PREL_NC
:
9769 case R_ARM_MOVT_PREL
:
9770 /* Until we properly support segment-base-relative addressing then
9771 we assume the segment base to be zero, as for the group relocations.
9772 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
9773 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
9774 case R_ARM_MOVW_BREL_NC
:
9775 case R_ARM_MOVW_BREL
:
9776 case R_ARM_MOVT_BREL
:
9778 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9780 if (globals
->use_rel
)
9782 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
9783 signed_addend
= (addend
^ 0x8000) - 0x8000;
9786 value
+= signed_addend
;
9788 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
9789 value
-= (input_section
->output_section
->vma
9790 + input_section
->output_offset
+ rel
->r_offset
);
9792 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
9793 return bfd_reloc_overflow
;
9795 if (branch_type
== ST_BRANCH_TO_THUMB
)
9798 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
9799 || r_type
== R_ARM_MOVT_BREL
)
9803 insn
|= value
& 0xfff;
9804 insn
|= (value
& 0xf000) << 4;
9805 bfd_put_32 (input_bfd
, insn
, hit_data
);
9807 return bfd_reloc_ok
;
9809 case R_ARM_THM_MOVW_ABS_NC
:
9810 case R_ARM_THM_MOVT_ABS
:
9811 case R_ARM_THM_MOVW_PREL_NC
:
9812 case R_ARM_THM_MOVT_PREL
:
9813 /* Until we properly support segment-base-relative addressing then
9814 we assume the segment base to be zero, as for the above relocations.
9815 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
9816 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
9817 as R_ARM_THM_MOVT_ABS. */
9818 case R_ARM_THM_MOVW_BREL_NC
:
9819 case R_ARM_THM_MOVW_BREL
:
9820 case R_ARM_THM_MOVT_BREL
:
9824 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
9825 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
9827 if (globals
->use_rel
)
9829 addend
= ((insn
>> 4) & 0xf000)
9830 | ((insn
>> 15) & 0x0800)
9831 | ((insn
>> 4) & 0x0700)
9833 signed_addend
= (addend
^ 0x8000) - 0x8000;
9836 value
+= signed_addend
;
9838 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
9839 value
-= (input_section
->output_section
->vma
9840 + input_section
->output_offset
+ rel
->r_offset
);
9842 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
9843 return bfd_reloc_overflow
;
9845 if (branch_type
== ST_BRANCH_TO_THUMB
)
9848 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
9849 || r_type
== R_ARM_THM_MOVT_BREL
)
9853 insn
|= (value
& 0xf000) << 4;
9854 insn
|= (value
& 0x0800) << 15;
9855 insn
|= (value
& 0x0700) << 4;
9856 insn
|= (value
& 0x00ff);
9858 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
9859 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
9861 return bfd_reloc_ok
;
9863 case R_ARM_ALU_PC_G0_NC
:
9864 case R_ARM_ALU_PC_G1_NC
:
9865 case R_ARM_ALU_PC_G0
:
9866 case R_ARM_ALU_PC_G1
:
9867 case R_ARM_ALU_PC_G2
:
9868 case R_ARM_ALU_SB_G0_NC
:
9869 case R_ARM_ALU_SB_G1_NC
:
9870 case R_ARM_ALU_SB_G0
:
9871 case R_ARM_ALU_SB_G1
:
9872 case R_ARM_ALU_SB_G2
:
9874 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
9875 bfd_vma pc
= input_section
->output_section
->vma
9876 + input_section
->output_offset
+ rel
->r_offset
;
9877 /* sb is the origin of the *segment* containing the symbol. */
9878 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
9881 bfd_signed_vma signed_value
;
9884 /* Determine which group of bits to select. */
9887 case R_ARM_ALU_PC_G0_NC
:
9888 case R_ARM_ALU_PC_G0
:
9889 case R_ARM_ALU_SB_G0_NC
:
9890 case R_ARM_ALU_SB_G0
:
9894 case R_ARM_ALU_PC_G1_NC
:
9895 case R_ARM_ALU_PC_G1
:
9896 case R_ARM_ALU_SB_G1_NC
:
9897 case R_ARM_ALU_SB_G1
:
9901 case R_ARM_ALU_PC_G2
:
9902 case R_ARM_ALU_SB_G2
:
9910 /* If REL, extract the addend from the insn. If RELA, it will
9911 have already been fetched for us. */
9912 if (globals
->use_rel
)
9915 bfd_vma constant
= insn
& 0xff;
9916 bfd_vma rotation
= (insn
& 0xf00) >> 8;
9919 signed_addend
= constant
;
9922 /* Compensate for the fact that in the instruction, the
9923 rotation is stored in multiples of 2 bits. */
9926 /* Rotate "constant" right by "rotation" bits. */
9927 signed_addend
= (constant
>> rotation
) |
9928 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
9931 /* Determine if the instruction is an ADD or a SUB.
9932 (For REL, this determines the sign of the addend.) */
9933 negative
= identify_add_or_sub (insn
);
9936 (*_bfd_error_handler
)
9937 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
9938 input_bfd
, input_section
,
9939 (long) rel
->r_offset
, howto
->name
);
9940 return bfd_reloc_overflow
;
9943 signed_addend
*= negative
;
9946 /* Compute the value (X) to go in the place. */
9947 if (r_type
== R_ARM_ALU_PC_G0_NC
9948 || r_type
== R_ARM_ALU_PC_G1_NC
9949 || r_type
== R_ARM_ALU_PC_G0
9950 || r_type
== R_ARM_ALU_PC_G1
9951 || r_type
== R_ARM_ALU_PC_G2
)
9953 signed_value
= value
- pc
+ signed_addend
;
9955 /* Section base relative. */
9956 signed_value
= value
- sb
+ signed_addend
;
9958 /* If the target symbol is a Thumb function, then set the
9959 Thumb bit in the address. */
9960 if (branch_type
== ST_BRANCH_TO_THUMB
)
9963 /* Calculate the value of the relevant G_n, in encoded
9964 constant-with-rotation format. */
9965 g_n
= calculate_group_reloc_mask (abs (signed_value
), group
,
9968 /* Check for overflow if required. */
9969 if ((r_type
== R_ARM_ALU_PC_G0
9970 || r_type
== R_ARM_ALU_PC_G1
9971 || r_type
== R_ARM_ALU_PC_G2
9972 || r_type
== R_ARM_ALU_SB_G0
9973 || r_type
== R_ARM_ALU_SB_G1
9974 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
9976 (*_bfd_error_handler
)
9977 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
9978 input_bfd
, input_section
,
9979 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
9980 return bfd_reloc_overflow
;
9983 /* Mask out the value and the ADD/SUB part of the opcode; take care
9984 not to destroy the S bit. */
9987 /* Set the opcode according to whether the value to go in the
9988 place is negative. */
9989 if (signed_value
< 0)
9994 /* Encode the offset. */
9997 bfd_put_32 (input_bfd
, insn
, hit_data
);
9999 return bfd_reloc_ok
;
10001 case R_ARM_LDR_PC_G0
:
10002 case R_ARM_LDR_PC_G1
:
10003 case R_ARM_LDR_PC_G2
:
10004 case R_ARM_LDR_SB_G0
:
10005 case R_ARM_LDR_SB_G1
:
10006 case R_ARM_LDR_SB_G2
:
10008 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
10009 bfd_vma pc
= input_section
->output_section
->vma
10010 + input_section
->output_offset
+ rel
->r_offset
;
10011 /* sb is the origin of the *segment* containing the symbol. */
10012 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
10014 bfd_signed_vma signed_value
;
10017 /* Determine which groups of bits to calculate. */
10020 case R_ARM_LDR_PC_G0
:
10021 case R_ARM_LDR_SB_G0
:
10025 case R_ARM_LDR_PC_G1
:
10026 case R_ARM_LDR_SB_G1
:
10030 case R_ARM_LDR_PC_G2
:
10031 case R_ARM_LDR_SB_G2
:
10039 /* If REL, extract the addend from the insn. If RELA, it will
10040 have already been fetched for us. */
10041 if (globals
->use_rel
)
10043 int negative
= (insn
& (1 << 23)) ? 1 : -1;
10044 signed_addend
= negative
* (insn
& 0xfff);
10047 /* Compute the value (X) to go in the place. */
10048 if (r_type
== R_ARM_LDR_PC_G0
10049 || r_type
== R_ARM_LDR_PC_G1
10050 || r_type
== R_ARM_LDR_PC_G2
)
10052 signed_value
= value
- pc
+ signed_addend
;
10054 /* Section base relative. */
10055 signed_value
= value
- sb
+ signed_addend
;
10057 /* Calculate the value of the relevant G_{n-1} to obtain
10058 the residual at that stage. */
10059 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
10061 /* Check for overflow. */
10062 if (residual
>= 0x1000)
10064 (*_bfd_error_handler
)
10065 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10066 input_bfd
, input_section
,
10067 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
10068 return bfd_reloc_overflow
;
10071 /* Mask out the value and U bit. */
10072 insn
&= 0xff7ff000;
10074 /* Set the U bit if the value to go in the place is non-negative. */
10075 if (signed_value
>= 0)
10078 /* Encode the offset. */
10081 bfd_put_32 (input_bfd
, insn
, hit_data
);
10083 return bfd_reloc_ok
;
10085 case R_ARM_LDRS_PC_G0
:
10086 case R_ARM_LDRS_PC_G1
:
10087 case R_ARM_LDRS_PC_G2
:
10088 case R_ARM_LDRS_SB_G0
:
10089 case R_ARM_LDRS_SB_G1
:
10090 case R_ARM_LDRS_SB_G2
:
10092 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
10093 bfd_vma pc
= input_section
->output_section
->vma
10094 + input_section
->output_offset
+ rel
->r_offset
;
10095 /* sb is the origin of the *segment* containing the symbol. */
10096 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
10098 bfd_signed_vma signed_value
;
10101 /* Determine which groups of bits to calculate. */
10104 case R_ARM_LDRS_PC_G0
:
10105 case R_ARM_LDRS_SB_G0
:
10109 case R_ARM_LDRS_PC_G1
:
10110 case R_ARM_LDRS_SB_G1
:
10114 case R_ARM_LDRS_PC_G2
:
10115 case R_ARM_LDRS_SB_G2
:
10123 /* If REL, extract the addend from the insn. If RELA, it will
10124 have already been fetched for us. */
10125 if (globals
->use_rel
)
10127 int negative
= (insn
& (1 << 23)) ? 1 : -1;
10128 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
10131 /* Compute the value (X) to go in the place. */
10132 if (r_type
== R_ARM_LDRS_PC_G0
10133 || r_type
== R_ARM_LDRS_PC_G1
10134 || r_type
== R_ARM_LDRS_PC_G2
)
10136 signed_value
= value
- pc
+ signed_addend
;
10138 /* Section base relative. */
10139 signed_value
= value
- sb
+ signed_addend
;
10141 /* Calculate the value of the relevant G_{n-1} to obtain
10142 the residual at that stage. */
10143 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
10145 /* Check for overflow. */
10146 if (residual
>= 0x100)
10148 (*_bfd_error_handler
)
10149 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10150 input_bfd
, input_section
,
10151 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
10152 return bfd_reloc_overflow
;
10155 /* Mask out the value and U bit. */
10156 insn
&= 0xff7ff0f0;
10158 /* Set the U bit if the value to go in the place is non-negative. */
10159 if (signed_value
>= 0)
10162 /* Encode the offset. */
10163 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
10165 bfd_put_32 (input_bfd
, insn
, hit_data
);
10167 return bfd_reloc_ok
;
10169 case R_ARM_LDC_PC_G0
:
10170 case R_ARM_LDC_PC_G1
:
10171 case R_ARM_LDC_PC_G2
:
10172 case R_ARM_LDC_SB_G0
:
10173 case R_ARM_LDC_SB_G1
:
10174 case R_ARM_LDC_SB_G2
:
10176 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
10177 bfd_vma pc
= input_section
->output_section
->vma
10178 + input_section
->output_offset
+ rel
->r_offset
;
10179 /* sb is the origin of the *segment* containing the symbol. */
10180 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
10182 bfd_signed_vma signed_value
;
10185 /* Determine which groups of bits to calculate. */
10188 case R_ARM_LDC_PC_G0
:
10189 case R_ARM_LDC_SB_G0
:
10193 case R_ARM_LDC_PC_G1
:
10194 case R_ARM_LDC_SB_G1
:
10198 case R_ARM_LDC_PC_G2
:
10199 case R_ARM_LDC_SB_G2
:
10207 /* If REL, extract the addend from the insn. If RELA, it will
10208 have already been fetched for us. */
10209 if (globals
->use_rel
)
10211 int negative
= (insn
& (1 << 23)) ? 1 : -1;
10212 signed_addend
= negative
* ((insn
& 0xff) << 2);
10215 /* Compute the value (X) to go in the place. */
10216 if (r_type
== R_ARM_LDC_PC_G0
10217 || r_type
== R_ARM_LDC_PC_G1
10218 || r_type
== R_ARM_LDC_PC_G2
)
10220 signed_value
= value
- pc
+ signed_addend
;
10222 /* Section base relative. */
10223 signed_value
= value
- sb
+ signed_addend
;
10225 /* Calculate the value of the relevant G_{n-1} to obtain
10226 the residual at that stage. */
10227 calculate_group_reloc_mask (abs (signed_value
), group
- 1, &residual
);
10229 /* Check for overflow. (The absolute value to go in the place must be
10230 divisible by four and, after having been divided by four, must
10231 fit in eight bits.) */
10232 if ((residual
& 0x3) != 0 || residual
>= 0x400)
10234 (*_bfd_error_handler
)
10235 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10236 input_bfd
, input_section
,
10237 (long) rel
->r_offset
, abs (signed_value
), howto
->name
);
10238 return bfd_reloc_overflow
;
10241 /* Mask out the value and U bit. */
10242 insn
&= 0xff7fff00;
10244 /* Set the U bit if the value to go in the place is non-negative. */
10245 if (signed_value
>= 0)
10248 /* Encode the offset. */
10249 insn
|= residual
>> 2;
10251 bfd_put_32 (input_bfd
, insn
, hit_data
);
10253 return bfd_reloc_ok
;
10256 return bfd_reloc_notsupported
;
10260 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
10262 arm_add_to_rel (bfd
* abfd
,
10263 bfd_byte
* address
,
10264 reloc_howto_type
* howto
,
10265 bfd_signed_vma increment
)
10267 bfd_signed_vma addend
;
10269 if (howto
->type
== R_ARM_THM_CALL
10270 || howto
->type
== R_ARM_THM_JUMP24
)
10272 int upper_insn
, lower_insn
;
10275 upper_insn
= bfd_get_16 (abfd
, address
);
10276 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
10277 upper
= upper_insn
& 0x7ff;
10278 lower
= lower_insn
& 0x7ff;
10280 addend
= (upper
<< 12) | (lower
<< 1);
10281 addend
+= increment
;
10284 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
10285 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
10287 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
10288 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
10294 contents
= bfd_get_32 (abfd
, address
);
10296 /* Get the (signed) value from the instruction. */
10297 addend
= contents
& howto
->src_mask
;
10298 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10300 bfd_signed_vma mask
;
10303 mask
&= ~ howto
->src_mask
;
10307 /* Add in the increment, (which is a byte value). */
10308 switch (howto
->type
)
10311 addend
+= increment
;
10318 addend
<<= howto
->size
;
10319 addend
+= increment
;
10321 /* Should we check for overflow here ? */
10323 /* Drop any undesired bits. */
10324 addend
>>= howto
->rightshift
;
10328 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
10330 bfd_put_32 (abfd
, contents
, address
);
10334 #define IS_ARM_TLS_RELOC(R_TYPE) \
10335 ((R_TYPE) == R_ARM_TLS_GD32 \
10336 || (R_TYPE) == R_ARM_TLS_LDO32 \
10337 || (R_TYPE) == R_ARM_TLS_LDM32 \
10338 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
10339 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
10340 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
10341 || (R_TYPE) == R_ARM_TLS_LE32 \
10342 || (R_TYPE) == R_ARM_TLS_IE32 \
10343 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
10345 /* Specific set of relocations for the gnu tls dialect. */
10346 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
10347 ((R_TYPE) == R_ARM_TLS_GOTDESC \
10348 || (R_TYPE) == R_ARM_TLS_CALL \
10349 || (R_TYPE) == R_ARM_THM_TLS_CALL \
10350 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
10351 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
10353 /* Relocate an ARM ELF section. */
10356 elf32_arm_relocate_section (bfd
* output_bfd
,
10357 struct bfd_link_info
* info
,
10359 asection
* input_section
,
10360 bfd_byte
* contents
,
10361 Elf_Internal_Rela
* relocs
,
10362 Elf_Internal_Sym
* local_syms
,
10363 asection
** local_sections
)
10365 Elf_Internal_Shdr
*symtab_hdr
;
10366 struct elf_link_hash_entry
**sym_hashes
;
10367 Elf_Internal_Rela
*rel
;
10368 Elf_Internal_Rela
*relend
;
10370 struct elf32_arm_link_hash_table
* globals
;
10372 globals
= elf32_arm_hash_table (info
);
10373 if (globals
== NULL
)
10376 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
10377 sym_hashes
= elf_sym_hashes (input_bfd
);
10380 relend
= relocs
+ input_section
->reloc_count
;
10381 for (; rel
< relend
; rel
++)
10384 reloc_howto_type
* howto
;
10385 unsigned long r_symndx
;
10386 Elf_Internal_Sym
* sym
;
10388 struct elf_link_hash_entry
* h
;
10389 bfd_vma relocation
;
10390 bfd_reloc_status_type r
;
10393 bfd_boolean unresolved_reloc
= FALSE
;
10394 char *error_message
= NULL
;
10396 r_symndx
= ELF32_R_SYM (rel
->r_info
);
10397 r_type
= ELF32_R_TYPE (rel
->r_info
);
10398 r_type
= arm_real_reloc_type (globals
, r_type
);
10400 if ( r_type
== R_ARM_GNU_VTENTRY
10401 || r_type
== R_ARM_GNU_VTINHERIT
)
10404 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
10405 howto
= bfd_reloc
.howto
;
10411 if (r_symndx
< symtab_hdr
->sh_info
)
10413 sym
= local_syms
+ r_symndx
;
10414 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
10415 sec
= local_sections
[r_symndx
];
10417 /* An object file might have a reference to a local
10418 undefined symbol. This is a daft object file, but we
10419 should at least do something about it. V4BX & NONE
10420 relocations do not use the symbol and are explicitly
10421 allowed to use the undefined symbol, so allow those.
10422 Likewise for relocations against STN_UNDEF. */
10423 if (r_type
!= R_ARM_V4BX
10424 && r_type
!= R_ARM_NONE
10425 && r_symndx
!= STN_UNDEF
10426 && bfd_is_und_section (sec
)
10427 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
10429 if (!info
->callbacks
->undefined_symbol
10430 (info
, bfd_elf_string_from_elf_section
10431 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
10432 input_bfd
, input_section
,
10433 rel
->r_offset
, TRUE
))
10437 if (globals
->use_rel
)
10439 relocation
= (sec
->output_section
->vma
10440 + sec
->output_offset
10442 if (!info
->relocatable
10443 && (sec
->flags
& SEC_MERGE
)
10444 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
10447 bfd_vma addend
, value
;
10451 case R_ARM_MOVW_ABS_NC
:
10452 case R_ARM_MOVT_ABS
:
10453 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
10454 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
10455 addend
= (addend
^ 0x8000) - 0x8000;
10458 case R_ARM_THM_MOVW_ABS_NC
:
10459 case R_ARM_THM_MOVT_ABS
:
10460 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
10462 value
|= bfd_get_16 (input_bfd
,
10463 contents
+ rel
->r_offset
+ 2);
10464 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
10465 | ((value
& 0x04000000) >> 15);
10466 addend
= (addend
^ 0x8000) - 0x8000;
10470 if (howto
->rightshift
10471 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
10473 (*_bfd_error_handler
)
10474 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
10475 input_bfd
, input_section
,
10476 (long) rel
->r_offset
, howto
->name
);
10480 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
10482 /* Get the (signed) value from the instruction. */
10483 addend
= value
& howto
->src_mask
;
10484 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10486 bfd_signed_vma mask
;
10489 mask
&= ~ howto
->src_mask
;
10497 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
10499 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
10501 /* Cases here must match those in the preceding
10502 switch statement. */
10505 case R_ARM_MOVW_ABS_NC
:
10506 case R_ARM_MOVT_ABS
:
10507 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
10508 | (addend
& 0xfff);
10509 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
10512 case R_ARM_THM_MOVW_ABS_NC
:
10513 case R_ARM_THM_MOVT_ABS
:
10514 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
10515 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
10516 bfd_put_16 (input_bfd
, value
>> 16,
10517 contents
+ rel
->r_offset
);
10518 bfd_put_16 (input_bfd
, value
,
10519 contents
+ rel
->r_offset
+ 2);
10523 value
= (value
& ~ howto
->dst_mask
)
10524 | (addend
& howto
->dst_mask
);
10525 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
10531 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
10535 bfd_boolean warned
, ignored
;
10537 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
10538 r_symndx
, symtab_hdr
, sym_hashes
,
10539 h
, sec
, relocation
,
10540 unresolved_reloc
, warned
, ignored
);
10542 sym_type
= h
->type
;
10545 if (sec
!= NULL
&& discarded_section (sec
))
10546 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
10547 rel
, 1, relend
, howto
, 0, contents
);
10549 if (info
->relocatable
)
10551 /* This is a relocatable link. We don't have to change
10552 anything, unless the reloc is against a section symbol,
10553 in which case we have to adjust according to where the
10554 section symbol winds up in the output section. */
10555 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
10557 if (globals
->use_rel
)
10558 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
10559 howto
, (bfd_signed_vma
) sec
->output_offset
);
10561 rel
->r_addend
+= sec
->output_offset
;
10567 name
= h
->root
.root
.string
;
10570 name
= (bfd_elf_string_from_elf_section
10571 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
10572 if (name
== NULL
|| *name
== '\0')
10573 name
= bfd_section_name (input_bfd
, sec
);
10576 if (r_symndx
!= STN_UNDEF
10577 && r_type
!= R_ARM_NONE
10579 || h
->root
.type
== bfd_link_hash_defined
10580 || h
->root
.type
== bfd_link_hash_defweak
)
10581 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
10583 (*_bfd_error_handler
)
10584 ((sym_type
== STT_TLS
10585 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10586 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
10589 (long) rel
->r_offset
,
10594 /* We call elf32_arm_final_link_relocate unless we're completely
10595 done, i.e., the relaxation produced the final output we want,
10596 and we won't let anybody mess with it. Also, we have to do
10597 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
10598 both in relaxed and non-relaxed cases */
10599 if ((elf32_arm_tls_transition (info
, r_type
, h
) != (unsigned)r_type
)
10600 || (IS_ARM_TLS_GNU_RELOC (r_type
)
10601 && !((h
? elf32_arm_hash_entry (h
)->tls_type
:
10602 elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
])
10605 r
= elf32_arm_tls_relax (globals
, input_bfd
, input_section
,
10606 contents
, rel
, h
== NULL
);
10607 /* This may have been marked unresolved because it came from
10608 a shared library. But we've just dealt with that. */
10609 unresolved_reloc
= 0;
10612 r
= bfd_reloc_continue
;
10614 if (r
== bfd_reloc_continue
)
10615 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
10616 input_section
, contents
, rel
,
10617 relocation
, info
, sec
, name
, sym_type
,
10618 (h
? h
->target_internal
10619 : ARM_SYM_BRANCH_TYPE (sym
)), h
,
10620 &unresolved_reloc
, &error_message
);
10622 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10623 because such sections are not SEC_ALLOC and thus ld.so will
10624 not process them. */
10625 if (unresolved_reloc
10626 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
10628 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
10629 rel
->r_offset
) != (bfd_vma
) -1)
10631 (*_bfd_error_handler
)
10632 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10635 (long) rel
->r_offset
,
10637 h
->root
.root
.string
);
10641 if (r
!= bfd_reloc_ok
)
10645 case bfd_reloc_overflow
:
10646 /* If the overflowing reloc was to an undefined symbol,
10647 we have already printed one error message and there
10648 is no point complaining again. */
10650 h
->root
.type
!= bfd_link_hash_undefined
)
10651 && (!((*info
->callbacks
->reloc_overflow
)
10652 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
10653 (bfd_vma
) 0, input_bfd
, input_section
,
10658 case bfd_reloc_undefined
:
10659 if (!((*info
->callbacks
->undefined_symbol
)
10660 (info
, name
, input_bfd
, input_section
,
10661 rel
->r_offset
, TRUE
)))
10665 case bfd_reloc_outofrange
:
10666 error_message
= _("out of range");
10669 case bfd_reloc_notsupported
:
10670 error_message
= _("unsupported relocation");
10673 case bfd_reloc_dangerous
:
10674 /* error_message should already be set. */
10678 error_message
= _("unknown error");
10679 /* Fall through. */
10682 BFD_ASSERT (error_message
!= NULL
);
10683 if (!((*info
->callbacks
->reloc_dangerous
)
10684 (info
, error_message
, input_bfd
, input_section
,
10695 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
10696 adds the edit to the start of the list. (The list must be built in order of
10697 ascending TINDEX: the function's callers are primarily responsible for
10698 maintaining that condition). */
10701 add_unwind_table_edit (arm_unwind_table_edit
**head
,
10702 arm_unwind_table_edit
**tail
,
10703 arm_unwind_edit_type type
,
10704 asection
*linked_section
,
10705 unsigned int tindex
)
10707 arm_unwind_table_edit
*new_edit
= (arm_unwind_table_edit
*)
10708 xmalloc (sizeof (arm_unwind_table_edit
));
10710 new_edit
->type
= type
;
10711 new_edit
->linked_section
= linked_section
;
10712 new_edit
->index
= tindex
;
10716 new_edit
->next
= NULL
;
10719 (*tail
)->next
= new_edit
;
10721 (*tail
) = new_edit
;
10724 (*head
) = new_edit
;
10728 new_edit
->next
= *head
;
10737 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
10739 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
10741 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
10745 if (!exidx_sec
->rawsize
)
10746 exidx_sec
->rawsize
= exidx_sec
->size
;
10748 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
10749 out_sec
= exidx_sec
->output_section
;
10750 /* Adjust size of output section. */
10751 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
10754 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
10756 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
10758 struct _arm_elf_section_data
*exidx_arm_data
;
10760 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
10761 add_unwind_table_edit (
10762 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
10763 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
10764 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
10766 adjust_exidx_size(exidx_sec
, 8);
10769 /* Scan .ARM.exidx tables, and create a list describing edits which should be
10770 made to those tables, such that:
10772 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
10773 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
10774 codes which have been inlined into the index).
10776 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
10778 The edits are applied when the tables are written
10779 (in elf32_arm_write_section). */
10782 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
10783 unsigned int num_text_sections
,
10784 struct bfd_link_info
*info
,
10785 bfd_boolean merge_exidx_entries
)
10788 unsigned int last_second_word
= 0, i
;
10789 asection
*last_exidx_sec
= NULL
;
10790 asection
*last_text_sec
= NULL
;
10791 int last_unwind_type
= -1;
10793 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
10795 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link_next
)
10799 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
10801 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
10802 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
10804 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
10807 if (elf_sec
->linked_to
)
10809 Elf_Internal_Shdr
*linked_hdr
10810 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
10811 struct _arm_elf_section_data
*linked_sec_arm_data
10812 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
10814 if (linked_sec_arm_data
== NULL
)
10817 /* Link this .ARM.exidx section back from the text section it
10819 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
10824 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
10825 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
10826 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
10828 for (i
= 0; i
< num_text_sections
; i
++)
10830 asection
*sec
= text_section_order
[i
];
10831 asection
*exidx_sec
;
10832 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
10833 struct _arm_elf_section_data
*exidx_arm_data
;
10834 bfd_byte
*contents
= NULL
;
10835 int deleted_exidx_bytes
= 0;
10837 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
10838 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
10839 Elf_Internal_Shdr
*hdr
;
10842 if (arm_data
== NULL
)
10845 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
10846 if (exidx_sec
== NULL
)
10848 /* Section has no unwind data. */
10849 if (last_unwind_type
== 0 || !last_exidx_sec
)
10852 /* Ignore zero sized sections. */
10853 if (sec
->size
== 0)
10856 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
10857 last_unwind_type
= 0;
10861 /* Skip /DISCARD/ sections. */
10862 if (bfd_is_abs_section (exidx_sec
->output_section
))
10865 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
10866 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
10869 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
10870 if (exidx_arm_data
== NULL
)
10873 ibfd
= exidx_sec
->owner
;
10875 if (hdr
->contents
!= NULL
)
10876 contents
= hdr
->contents
;
10877 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
10881 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
10883 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
10887 /* An EXIDX_CANTUNWIND entry. */
10888 if (second_word
== 1)
10890 if (last_unwind_type
== 0)
10894 /* Inlined unwinding data. Merge if equal to previous. */
10895 else if ((second_word
& 0x80000000) != 0)
10897 if (merge_exidx_entries
10898 && last_second_word
== second_word
&& last_unwind_type
== 1)
10901 last_second_word
= second_word
;
10903 /* Normal table entry. In theory we could merge these too,
10904 but duplicate entries are likely to be much less common. */
10910 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
10911 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
10913 deleted_exidx_bytes
+= 8;
10916 last_unwind_type
= unwind_type
;
10919 /* Free contents if we allocated it ourselves. */
10920 if (contents
!= hdr
->contents
)
10923 /* Record edits to be applied later (in elf32_arm_write_section). */
10924 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
10925 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
10927 if (deleted_exidx_bytes
> 0)
10928 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
10930 last_exidx_sec
= exidx_sec
;
10931 last_text_sec
= sec
;
10934 /* Add terminating CANTUNWIND entry. */
10935 if (last_exidx_sec
&& last_unwind_type
!= 0)
10936 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
10942 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
10943 bfd
*ibfd
, const char *name
)
10945 asection
*sec
, *osec
;
10947 sec
= bfd_get_linker_section (ibfd
, name
);
10948 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
10951 osec
= sec
->output_section
;
10952 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
10955 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
10956 sec
->output_offset
, sec
->size
))
10963 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10965 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
10966 asection
*sec
, *osec
;
10968 if (globals
== NULL
)
10971 /* Invoke the regular ELF backend linker to do all the work. */
10972 if (!bfd_elf_final_link (abfd
, info
))
10975 /* Process stub sections (eg BE8 encoding, ...). */
10976 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
10978 for (i
=0; i
<htab
->top_id
; i
++)
10980 sec
= htab
->stub_group
[i
].stub_sec
;
10981 /* Only process it once, in its link_sec slot. */
10982 if (sec
&& i
== htab
->stub_group
[i
].link_sec
->id
)
10984 osec
= sec
->output_section
;
10985 elf32_arm_write_section (abfd
, info
, sec
, sec
->contents
);
10986 if (! bfd_set_section_contents (abfd
, osec
, sec
->contents
,
10987 sec
->output_offset
, sec
->size
))
10992 /* Write out any glue sections now that we have created all the
10994 if (globals
->bfd_of_glue_owner
!= NULL
)
10996 if (! elf32_arm_output_glue_section (info
, abfd
,
10997 globals
->bfd_of_glue_owner
,
10998 ARM2THUMB_GLUE_SECTION_NAME
))
11001 if (! elf32_arm_output_glue_section (info
, abfd
,
11002 globals
->bfd_of_glue_owner
,
11003 THUMB2ARM_GLUE_SECTION_NAME
))
11006 if (! elf32_arm_output_glue_section (info
, abfd
,
11007 globals
->bfd_of_glue_owner
,
11008 VFP11_ERRATUM_VENEER_SECTION_NAME
))
11011 if (! elf32_arm_output_glue_section (info
, abfd
,
11012 globals
->bfd_of_glue_owner
,
11013 ARM_BX_GLUE_SECTION_NAME
))
11020 /* Return a best guess for the machine number based on the attributes. */
11022 static unsigned int
11023 bfd_arm_get_mach_from_attributes (bfd
* abfd
)
11025 int arch
= bfd_elf_get_obj_attr_int (abfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
11029 case TAG_CPU_ARCH_V4
: return bfd_mach_arm_4
;
11030 case TAG_CPU_ARCH_V4T
: return bfd_mach_arm_4T
;
11031 case TAG_CPU_ARCH_V5T
: return bfd_mach_arm_5T
;
11033 case TAG_CPU_ARCH_V5TE
:
11037 BFD_ASSERT (Tag_CPU_name
< NUM_KNOWN_OBJ_ATTRIBUTES
);
11038 name
= elf_known_obj_attributes (abfd
) [OBJ_ATTR_PROC
][Tag_CPU_name
].s
;
11042 if (strcmp (name
, "IWMMXT2") == 0)
11043 return bfd_mach_arm_iWMMXt2
;
11045 if (strcmp (name
, "IWMMXT") == 0)
11046 return bfd_mach_arm_iWMMXt
;
11048 if (strcmp (name
, "XSCALE") == 0)
11052 BFD_ASSERT (Tag_WMMX_arch
< NUM_KNOWN_OBJ_ATTRIBUTES
);
11053 wmmx
= elf_known_obj_attributes (abfd
) [OBJ_ATTR_PROC
][Tag_WMMX_arch
].i
;
11056 case 1: return bfd_mach_arm_iWMMXt
;
11057 case 2: return bfd_mach_arm_iWMMXt2
;
11058 default: return bfd_mach_arm_XScale
;
11063 return bfd_mach_arm_5TE
;
11067 return bfd_mach_arm_unknown
;
11071 /* Set the right machine number. */
11074 elf32_arm_object_p (bfd
*abfd
)
11078 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
11080 if (mach
== bfd_mach_arm_unknown
)
11082 if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
11083 mach
= bfd_mach_arm_ep9312
;
11085 mach
= bfd_arm_get_mach_from_attributes (abfd
);
11088 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
11092 /* Function to keep ARM specific flags in the ELF header. */
11095 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
11097 if (elf_flags_init (abfd
)
11098 && elf_elfheader (abfd
)->e_flags
!= flags
)
11100 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
11102 if (flags
& EF_ARM_INTERWORK
)
11103 (*_bfd_error_handler
)
11104 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
11108 (_("Warning: Clearing the interworking flag of %B due to outside request"),
11114 elf_elfheader (abfd
)->e_flags
= flags
;
11115 elf_flags_init (abfd
) = TRUE
;
11121 /* Copy backend specific data from one object module to another. */
11124 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
11127 flagword out_flags
;
11129 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
11132 in_flags
= elf_elfheader (ibfd
)->e_flags
;
11133 out_flags
= elf_elfheader (obfd
)->e_flags
;
11135 if (elf_flags_init (obfd
)
11136 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
11137 && in_flags
!= out_flags
)
11139 /* Cannot mix APCS26 and APCS32 code. */
11140 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
11143 /* Cannot mix float APCS and non-float APCS code. */
11144 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
11147 /* If the src and dest have different interworking flags
11148 then turn off the interworking bit. */
11149 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
11151 if (out_flags
& EF_ARM_INTERWORK
)
11153 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
11156 in_flags
&= ~EF_ARM_INTERWORK
;
11159 /* Likewise for PIC, though don't warn for this case. */
11160 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
11161 in_flags
&= ~EF_ARM_PIC
;
11164 elf_elfheader (obfd
)->e_flags
= in_flags
;
11165 elf_flags_init (obfd
) = TRUE
;
11167 return _bfd_elf_copy_private_bfd_data (ibfd
, obfd
);
11170 /* Values for Tag_ABI_PCS_R9_use. */
11179 /* Values for Tag_ABI_PCS_RW_data. */
11182 AEABI_PCS_RW_data_absolute
,
11183 AEABI_PCS_RW_data_PCrel
,
11184 AEABI_PCS_RW_data_SBrel
,
11185 AEABI_PCS_RW_data_unused
11188 /* Values for Tag_ABI_enum_size. */
11194 AEABI_enum_forced_wide
11197 /* Determine whether an object attribute tag takes an integer, a
11201 elf32_arm_obj_attrs_arg_type (int tag
)
11203 if (tag
== Tag_compatibility
)
11204 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
11205 else if (tag
== Tag_nodefaults
)
11206 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
11207 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
11208 return ATTR_TYPE_FLAG_STR_VAL
;
11210 return ATTR_TYPE_FLAG_INT_VAL
;
11212 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
11215 /* The ABI defines that Tag_conformance should be emitted first, and that
11216 Tag_nodefaults should be second (if either is defined). This sets those
11217 two positions, and bumps up the position of all the remaining tags to
11220 elf32_arm_obj_attrs_order (int num
)
11222 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
)
11223 return Tag_conformance
;
11224 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
+ 1)
11225 return Tag_nodefaults
;
11226 if ((num
- 2) < Tag_nodefaults
)
11228 if ((num
- 1) < Tag_conformance
)
11233 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
11235 elf32_arm_obj_attrs_handle_unknown (bfd
*abfd
, int tag
)
11237 if ((tag
& 127) < 64)
11240 (_("%B: Unknown mandatory EABI object attribute %d"),
11242 bfd_set_error (bfd_error_bad_value
);
11248 (_("Warning: %B: Unknown EABI object attribute %d"),
11254 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
11255 Returns -1 if no architecture could be read. */
11258 get_secondary_compatible_arch (bfd
*abfd
)
11260 obj_attribute
*attr
=
11261 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
11263 /* Note: the tag and its argument below are uleb128 values, though
11264 currently-defined values fit in one byte for each. */
11266 && attr
->s
[0] == Tag_CPU_arch
11267 && (attr
->s
[1] & 128) != 128
11268 && attr
->s
[2] == 0)
11271 /* This tag is "safely ignorable", so don't complain if it looks funny. */
11275 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
11276 The tag is removed if ARCH is -1. */
11279 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
11281 obj_attribute
*attr
=
11282 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
11290 /* Note: the tag and its argument below are uleb128 values, though
11291 currently-defined values fit in one byte for each. */
11293 attr
->s
= (char *) bfd_alloc (abfd
, 3);
11294 attr
->s
[0] = Tag_CPU_arch
;
11299 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
11303 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
11304 int newtag
, int secondary_compat
)
11306 #define T(X) TAG_CPU_ARCH_##X
11307 int tagl
, tagh
, result
;
11310 T(V6T2
), /* PRE_V4. */
11312 T(V6T2
), /* V4T. */
11313 T(V6T2
), /* V5T. */
11314 T(V6T2
), /* V5TE. */
11315 T(V6T2
), /* V5TEJ. */
11318 T(V6T2
) /* V6T2. */
11322 T(V6K
), /* PRE_V4. */
11326 T(V6K
), /* V5TE. */
11327 T(V6K
), /* V5TEJ. */
11329 T(V6KZ
), /* V6KZ. */
11335 T(V7
), /* PRE_V4. */
11340 T(V7
), /* V5TEJ. */
11353 T(V6K
), /* V5TE. */
11354 T(V6K
), /* V5TEJ. */
11356 T(V6KZ
), /* V6KZ. */
11360 T(V6_M
) /* V6_M. */
11362 const int v6s_m
[] =
11368 T(V6K
), /* V5TE. */
11369 T(V6K
), /* V5TEJ. */
11371 T(V6KZ
), /* V6KZ. */
11375 T(V6S_M
), /* V6_M. */
11376 T(V6S_M
) /* V6S_M. */
11378 const int v7e_m
[] =
11382 T(V7E_M
), /* V4T. */
11383 T(V7E_M
), /* V5T. */
11384 T(V7E_M
), /* V5TE. */
11385 T(V7E_M
), /* V5TEJ. */
11386 T(V7E_M
), /* V6. */
11387 T(V7E_M
), /* V6KZ. */
11388 T(V7E_M
), /* V6T2. */
11389 T(V7E_M
), /* V6K. */
11390 T(V7E_M
), /* V7. */
11391 T(V7E_M
), /* V6_M. */
11392 T(V7E_M
), /* V6S_M. */
11393 T(V7E_M
) /* V7E_M. */
11397 T(V8
), /* PRE_V4. */
11402 T(V8
), /* V5TEJ. */
11409 T(V8
), /* V6S_M. */
11410 T(V8
), /* V7E_M. */
11413 const int v4t_plus_v6_m
[] =
11419 T(V5TE
), /* V5TE. */
11420 T(V5TEJ
), /* V5TEJ. */
11422 T(V6KZ
), /* V6KZ. */
11423 T(V6T2
), /* V6T2. */
11426 T(V6_M
), /* V6_M. */
11427 T(V6S_M
), /* V6S_M. */
11428 T(V7E_M
), /* V7E_M. */
11430 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
11432 const int *comb
[] =
11441 /* Pseudo-architecture. */
11445 /* Check we've not got a higher architecture than we know about. */
11447 if (oldtag
> MAX_TAG_CPU_ARCH
|| newtag
> MAX_TAG_CPU_ARCH
)
11449 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
11453 /* Override old tag if we have a Tag_also_compatible_with on the output. */
11455 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
11456 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
11457 oldtag
= T(V4T_PLUS_V6_M
);
11459 /* And override the new tag if we have a Tag_also_compatible_with on the
11462 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
11463 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
11464 newtag
= T(V4T_PLUS_V6_M
);
11466 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
11467 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
11469 /* Architectures before V6KZ add features monotonically. */
11470 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
11473 result
= comb
[tagh
- T(V6T2
)][tagl
];
11475 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
11476 as the canonical version. */
11477 if (result
== T(V4T_PLUS_V6_M
))
11480 *secondary_compat_out
= T(V6_M
);
11483 *secondary_compat_out
= -1;
11487 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
11488 ibfd
, oldtag
, newtag
);
11496 /* Query attributes object to see if integer divide instructions may be
11497 present in an object. */
11499 elf32_arm_attributes_accept_div (const obj_attribute
*attr
)
11501 int arch
= attr
[Tag_CPU_arch
].i
;
11502 int profile
= attr
[Tag_CPU_arch_profile
].i
;
11504 switch (attr
[Tag_DIV_use
].i
)
11507 /* Integer divide allowed if instruction contained in archetecture. */
11508 if (arch
== TAG_CPU_ARCH_V7
&& (profile
== 'R' || profile
== 'M'))
11510 else if (arch
>= TAG_CPU_ARCH_V7E_M
)
11516 /* Integer divide explicitly prohibited. */
11520 /* Unrecognised case - treat as allowing divide everywhere. */
11522 /* Integer divide allowed in ARM state. */
11527 /* Query attributes object to see if integer divide instructions are
11528 forbidden to be in the object. This is not the inverse of
11529 elf32_arm_attributes_accept_div. */
11531 elf32_arm_attributes_forbid_div (const obj_attribute
*attr
)
11533 return attr
[Tag_DIV_use
].i
== 1;
11536 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
11537 are conflicting attributes. */
11540 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, bfd
*obfd
)
11542 obj_attribute
*in_attr
;
11543 obj_attribute
*out_attr
;
11544 /* Some tags have 0 = don't care, 1 = strong requirement,
11545 2 = weak requirement. */
11546 static const int order_021
[3] = {0, 2, 1};
11548 bfd_boolean result
= TRUE
;
11550 /* Skip the linker stubs file. This preserves previous behavior
11551 of accepting unknown attributes in the first input file - but
11553 if (ibfd
->flags
& BFD_LINKER_CREATED
)
11556 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
11558 /* This is the first object. Copy the attributes. */
11559 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
11561 out_attr
= elf_known_obj_attributes_proc (obfd
);
11563 /* Use the Tag_null value to indicate the attributes have been
11567 /* We do not output objects with Tag_MPextension_use_legacy - we move
11568 the attribute's value to Tag_MPextension_use. */
11569 if (out_attr
[Tag_MPextension_use_legacy
].i
!= 0)
11571 if (out_attr
[Tag_MPextension_use
].i
!= 0
11572 && out_attr
[Tag_MPextension_use_legacy
].i
11573 != out_attr
[Tag_MPextension_use
].i
)
11576 (_("Error: %B has both the current and legacy "
11577 "Tag_MPextension_use attributes"), ibfd
);
11581 out_attr
[Tag_MPextension_use
] =
11582 out_attr
[Tag_MPextension_use_legacy
];
11583 out_attr
[Tag_MPextension_use_legacy
].type
= 0;
11584 out_attr
[Tag_MPextension_use_legacy
].i
= 0;
11590 in_attr
= elf_known_obj_attributes_proc (ibfd
);
11591 out_attr
= elf_known_obj_attributes_proc (obfd
);
11592 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
11593 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
11595 /* Ignore mismatches if the object doesn't use floating point. */
11596 if (out_attr
[Tag_ABI_FP_number_model
].i
== 0)
11597 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
11598 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= 0)
11601 (_("error: %B uses VFP register arguments, %B does not"),
11602 in_attr
[Tag_ABI_VFP_args
].i
? ibfd
: obfd
,
11603 in_attr
[Tag_ABI_VFP_args
].i
? obfd
: ibfd
);
11608 for (i
= LEAST_KNOWN_OBJ_ATTRIBUTE
; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
11610 /* Merge this attribute with existing attributes. */
11613 case Tag_CPU_raw_name
:
11615 /* These are merged after Tag_CPU_arch. */
11618 case Tag_ABI_optimization_goals
:
11619 case Tag_ABI_FP_optimization_goals
:
11620 /* Use the first value seen. */
11625 int secondary_compat
= -1, secondary_compat_out
= -1;
11626 unsigned int saved_out_attr
= out_attr
[i
].i
;
11627 static const char *name_table
[] = {
11628 /* These aren't real CPU names, but we can't guess
11629 that from the architecture version alone. */
11646 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
11647 secondary_compat
= get_secondary_compatible_arch (ibfd
);
11648 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
11649 out_attr
[i
].i
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
11650 &secondary_compat_out
,
11653 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
11655 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
11656 if (out_attr
[i
].i
== saved_out_attr
)
11657 ; /* Leave the names alone. */
11658 else if (out_attr
[i
].i
== in_attr
[i
].i
)
11660 /* The output architecture has been changed to match the
11661 input architecture. Use the input names. */
11662 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
11663 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
11665 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
11666 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
11671 out_attr
[Tag_CPU_name
].s
= NULL
;
11672 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
11675 /* If we still don't have a value for Tag_CPU_name,
11676 make one up now. Tag_CPU_raw_name remains blank. */
11677 if (out_attr
[Tag_CPU_name
].s
== NULL
11678 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
11679 out_attr
[Tag_CPU_name
].s
=
11680 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
11684 case Tag_ARM_ISA_use
:
11685 case Tag_THUMB_ISA_use
:
11686 case Tag_WMMX_arch
:
11687 case Tag_Advanced_SIMD_arch
:
11688 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
11689 case Tag_ABI_FP_rounding
:
11690 case Tag_ABI_FP_exceptions
:
11691 case Tag_ABI_FP_user_exceptions
:
11692 case Tag_ABI_FP_number_model
:
11693 case Tag_FP_HP_extension
:
11694 case Tag_CPU_unaligned_access
:
11696 case Tag_MPextension_use
:
11697 /* Use the largest value specified. */
11698 if (in_attr
[i
].i
> out_attr
[i
].i
)
11699 out_attr
[i
].i
= in_attr
[i
].i
;
11702 case Tag_ABI_align_preserved
:
11703 case Tag_ABI_PCS_RO_data
:
11704 /* Use the smallest value specified. */
11705 if (in_attr
[i
].i
< out_attr
[i
].i
)
11706 out_attr
[i
].i
= in_attr
[i
].i
;
11709 case Tag_ABI_align_needed
:
11710 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
11711 && (in_attr
[Tag_ABI_align_preserved
].i
== 0
11712 || out_attr
[Tag_ABI_align_preserved
].i
== 0))
11714 /* This error message should be enabled once all non-conformant
11715 binaries in the toolchain have had the attributes set
11718 (_("error: %B: 8-byte data alignment conflicts with %B"),
11722 /* Fall through. */
11723 case Tag_ABI_FP_denormal
:
11724 case Tag_ABI_PCS_GOT_use
:
11725 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
11726 value if greater than 2 (for future-proofing). */
11727 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
11728 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
11729 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
11730 out_attr
[i
].i
= in_attr
[i
].i
;
11733 case Tag_Virtualization_use
:
11734 /* The virtualization tag effectively stores two bits of
11735 information: the intended use of TrustZone (in bit 0), and the
11736 intended use of Virtualization (in bit 1). */
11737 if (out_attr
[i
].i
== 0)
11738 out_attr
[i
].i
= in_attr
[i
].i
;
11739 else if (in_attr
[i
].i
!= 0
11740 && in_attr
[i
].i
!= out_attr
[i
].i
)
11742 if (in_attr
[i
].i
<= 3 && out_attr
[i
].i
<= 3)
11747 (_("error: %B: unable to merge virtualization attributes "
11755 case Tag_CPU_arch_profile
:
11756 if (out_attr
[i
].i
!= in_attr
[i
].i
)
11758 /* 0 will merge with anything.
11759 'A' and 'S' merge to 'A'.
11760 'R' and 'S' merge to 'R'.
11761 'M' and 'A|R|S' is an error. */
11762 if (out_attr
[i
].i
== 0
11763 || (out_attr
[i
].i
== 'S'
11764 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
11765 out_attr
[i
].i
= in_attr
[i
].i
;
11766 else if (in_attr
[i
].i
== 0
11767 || (in_attr
[i
].i
== 'S'
11768 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
11769 ; /* Do nothing. */
11773 (_("error: %B: Conflicting architecture profiles %c/%c"),
11775 in_attr
[i
].i
? in_attr
[i
].i
: '0',
11776 out_attr
[i
].i
? out_attr
[i
].i
: '0');
11783 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
11784 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
11785 when it's 0. It might mean absence of FP hardware if
11786 Tag_FP_arch is zero, otherwise it is effectively SP + DP. */
11788 #define VFP_VERSION_COUNT 8
11789 static const struct
11793 } vfp_versions
[VFP_VERSION_COUNT
] =
11808 /* If the output has no requirement about FP hardware,
11809 follow the requirement of the input. */
11810 if (out_attr
[i
].i
== 0)
11812 BFD_ASSERT (out_attr
[Tag_ABI_HardFP_use
].i
== 0);
11813 out_attr
[i
].i
= in_attr
[i
].i
;
11814 out_attr
[Tag_ABI_HardFP_use
].i
11815 = in_attr
[Tag_ABI_HardFP_use
].i
;
11818 /* If the input has no requirement about FP hardware, do
11820 else if (in_attr
[i
].i
== 0)
11822 BFD_ASSERT (in_attr
[Tag_ABI_HardFP_use
].i
== 0);
11826 /* Both the input and the output have nonzero Tag_FP_arch.
11827 So Tag_ABI_HardFP_use is (SP & DP) when it's zero. */
11829 /* If both the input and the output have zero Tag_ABI_HardFP_use,
11831 if (in_attr
[Tag_ABI_HardFP_use
].i
== 0
11832 && out_attr
[Tag_ABI_HardFP_use
].i
== 0)
11834 /* If the input and the output have different Tag_ABI_HardFP_use,
11835 the combination of them is 3 (SP & DP). */
11836 else if (in_attr
[Tag_ABI_HardFP_use
].i
11837 != out_attr
[Tag_ABI_HardFP_use
].i
)
11838 out_attr
[Tag_ABI_HardFP_use
].i
= 3;
11840 /* Now we can handle Tag_FP_arch. */
11842 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
11843 pick the biggest. */
11844 if (in_attr
[i
].i
>= VFP_VERSION_COUNT
11845 && in_attr
[i
].i
> out_attr
[i
].i
)
11847 out_attr
[i
] = in_attr
[i
];
11850 /* The output uses the superset of input features
11851 (ISA version) and registers. */
11852 ver
= vfp_versions
[in_attr
[i
].i
].ver
;
11853 if (ver
< vfp_versions
[out_attr
[i
].i
].ver
)
11854 ver
= vfp_versions
[out_attr
[i
].i
].ver
;
11855 regs
= vfp_versions
[in_attr
[i
].i
].regs
;
11856 if (regs
< vfp_versions
[out_attr
[i
].i
].regs
)
11857 regs
= vfp_versions
[out_attr
[i
].i
].regs
;
11858 /* This assumes all possible supersets are also a valid
11860 for (newval
= VFP_VERSION_COUNT
- 1; newval
> 0; newval
--)
11862 if (regs
== vfp_versions
[newval
].regs
11863 && ver
== vfp_versions
[newval
].ver
)
11866 out_attr
[i
].i
= newval
;
11869 case Tag_PCS_config
:
11870 if (out_attr
[i
].i
== 0)
11871 out_attr
[i
].i
= in_attr
[i
].i
;
11872 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= in_attr
[i
].i
)
11874 /* It's sometimes ok to mix different configs, so this is only
11877 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
11880 case Tag_ABI_PCS_R9_use
:
11881 if (in_attr
[i
].i
!= out_attr
[i
].i
11882 && out_attr
[i
].i
!= AEABI_R9_unused
11883 && in_attr
[i
].i
!= AEABI_R9_unused
)
11886 (_("error: %B: Conflicting use of R9"), ibfd
);
11889 if (out_attr
[i
].i
== AEABI_R9_unused
)
11890 out_attr
[i
].i
= in_attr
[i
].i
;
11892 case Tag_ABI_PCS_RW_data
:
11893 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
11894 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
11895 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
11898 (_("error: %B: SB relative addressing conflicts with use of R9"),
11902 /* Use the smallest value specified. */
11903 if (in_attr
[i
].i
< out_attr
[i
].i
)
11904 out_attr
[i
].i
= in_attr
[i
].i
;
11906 case Tag_ABI_PCS_wchar_t
:
11907 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
11908 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
11911 (_("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"),
11912 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
11914 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
11915 out_attr
[i
].i
= in_attr
[i
].i
;
11917 case Tag_ABI_enum_size
:
11918 if (in_attr
[i
].i
!= AEABI_enum_unused
)
11920 if (out_attr
[i
].i
== AEABI_enum_unused
11921 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
11923 /* The existing object is compatible with anything.
11924 Use whatever requirements the new object has. */
11925 out_attr
[i
].i
= in_attr
[i
].i
;
11927 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
11928 && out_attr
[i
].i
!= in_attr
[i
].i
11929 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
11931 static const char *aeabi_enum_names
[] =
11932 { "", "variable-size", "32-bit", "" };
11933 const char *in_name
=
11934 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
11935 ? aeabi_enum_names
[in_attr
[i
].i
]
11937 const char *out_name
=
11938 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
11939 ? aeabi_enum_names
[out_attr
[i
].i
]
11942 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
11943 ibfd
, in_name
, out_name
);
11947 case Tag_ABI_VFP_args
:
11950 case Tag_ABI_WMMX_args
:
11951 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11954 (_("error: %B uses iWMMXt register arguments, %B does not"),
11959 case Tag_compatibility
:
11960 /* Merged in target-independent code. */
11962 case Tag_ABI_HardFP_use
:
11963 /* This is handled along with Tag_FP_arch. */
11965 case Tag_ABI_FP_16bit_format
:
11966 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
11968 if (in_attr
[i
].i
!= out_attr
[i
].i
)
11971 (_("error: fp16 format mismatch between %B and %B"),
11976 if (in_attr
[i
].i
!= 0)
11977 out_attr
[i
].i
= in_attr
[i
].i
;
11981 /* A value of zero on input means that the divide instruction may
11982 be used if available in the base architecture as specified via
11983 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
11984 the user did not want divide instructions. A value of 2
11985 explicitly means that divide instructions were allowed in ARM
11986 and Thumb state. */
11987 if (in_attr
[i
].i
== out_attr
[i
].i
)
11988 /* Do nothing. */ ;
11989 else if (elf32_arm_attributes_forbid_div (in_attr
)
11990 && !elf32_arm_attributes_accept_div (out_attr
))
11992 else if (elf32_arm_attributes_forbid_div (out_attr
)
11993 && elf32_arm_attributes_accept_div (in_attr
))
11994 out_attr
[i
].i
= in_attr
[i
].i
;
11995 else if (in_attr
[i
].i
== 2)
11996 out_attr
[i
].i
= in_attr
[i
].i
;
11999 case Tag_MPextension_use_legacy
:
12000 /* We don't output objects with Tag_MPextension_use_legacy - we
12001 move the value to Tag_MPextension_use. */
12002 if (in_attr
[i
].i
!= 0 && in_attr
[Tag_MPextension_use
].i
!= 0)
12004 if (in_attr
[Tag_MPextension_use
].i
!= in_attr
[i
].i
)
12007 (_("%B has has both the current and legacy "
12008 "Tag_MPextension_use attributes"),
12014 if (in_attr
[i
].i
> out_attr
[Tag_MPextension_use
].i
)
12015 out_attr
[Tag_MPextension_use
] = in_attr
[i
];
12019 case Tag_nodefaults
:
12020 /* This tag is set if it exists, but the value is unused (and is
12021 typically zero). We don't actually need to do anything here -
12022 the merge happens automatically when the type flags are merged
12025 case Tag_also_compatible_with
:
12026 /* Already done in Tag_CPU_arch. */
12028 case Tag_conformance
:
12029 /* Keep the attribute if it matches. Throw it away otherwise.
12030 No attribute means no claim to conform. */
12031 if (!in_attr
[i
].s
|| !out_attr
[i
].s
12032 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
12033 out_attr
[i
].s
= NULL
;
12038 = result
&& _bfd_elf_merge_unknown_attribute_low (ibfd
, obfd
, i
);
12041 /* If out_attr was copied from in_attr then it won't have a type yet. */
12042 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
12043 out_attr
[i
].type
= in_attr
[i
].type
;
12046 /* Merge Tag_compatibility attributes and any common GNU ones. */
12047 if (!_bfd_elf_merge_object_attributes (ibfd
, obfd
))
12050 /* Check for any attributes not known on ARM. */
12051 result
&= _bfd_elf_merge_unknown_attribute_list (ibfd
, obfd
);
12057 /* Return TRUE if the two EABI versions are incompatible. */
12060 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
12062 /* v4 and v5 are the same spec before and after it was released,
12063 so allow mixing them. */
12064 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
12065 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
12068 return (iver
== over
);
12071 /* Merge backend specific data from an object file to the output
12072 object file when linking. */
12075 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
);
12077 /* Display the flags field. */
12080 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
12082 FILE * file
= (FILE *) ptr
;
12083 unsigned long flags
;
12085 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
12087 /* Print normal ELF private data. */
12088 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
12090 flags
= elf_elfheader (abfd
)->e_flags
;
12091 /* Ignore init flag - it may not be set, despite the flags field
12092 containing valid data. */
12094 /* xgettext:c-format */
12095 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
12097 switch (EF_ARM_EABI_VERSION (flags
))
12099 case EF_ARM_EABI_UNKNOWN
:
12100 /* The following flag bits are GNU extensions and not part of the
12101 official ARM ELF extended ABI. Hence they are only decoded if
12102 the EABI version is not set. */
12103 if (flags
& EF_ARM_INTERWORK
)
12104 fprintf (file
, _(" [interworking enabled]"));
12106 if (flags
& EF_ARM_APCS_26
)
12107 fprintf (file
, " [APCS-26]");
12109 fprintf (file
, " [APCS-32]");
12111 if (flags
& EF_ARM_VFP_FLOAT
)
12112 fprintf (file
, _(" [VFP float format]"));
12113 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
12114 fprintf (file
, _(" [Maverick float format]"));
12116 fprintf (file
, _(" [FPA float format]"));
12118 if (flags
& EF_ARM_APCS_FLOAT
)
12119 fprintf (file
, _(" [floats passed in float registers]"));
12121 if (flags
& EF_ARM_PIC
)
12122 fprintf (file
, _(" [position independent]"));
12124 if (flags
& EF_ARM_NEW_ABI
)
12125 fprintf (file
, _(" [new ABI]"));
12127 if (flags
& EF_ARM_OLD_ABI
)
12128 fprintf (file
, _(" [old ABI]"));
12130 if (flags
& EF_ARM_SOFT_FLOAT
)
12131 fprintf (file
, _(" [software FP]"));
12133 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
12134 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
12135 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
12136 | EF_ARM_MAVERICK_FLOAT
);
12139 case EF_ARM_EABI_VER1
:
12140 fprintf (file
, _(" [Version1 EABI]"));
12142 if (flags
& EF_ARM_SYMSARESORTED
)
12143 fprintf (file
, _(" [sorted symbol table]"));
12145 fprintf (file
, _(" [unsorted symbol table]"));
12147 flags
&= ~ EF_ARM_SYMSARESORTED
;
12150 case EF_ARM_EABI_VER2
:
12151 fprintf (file
, _(" [Version2 EABI]"));
12153 if (flags
& EF_ARM_SYMSARESORTED
)
12154 fprintf (file
, _(" [sorted symbol table]"));
12156 fprintf (file
, _(" [unsorted symbol table]"));
12158 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
12159 fprintf (file
, _(" [dynamic symbols use segment index]"));
12161 if (flags
& EF_ARM_MAPSYMSFIRST
)
12162 fprintf (file
, _(" [mapping symbols precede others]"));
12164 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
12165 | EF_ARM_MAPSYMSFIRST
);
12168 case EF_ARM_EABI_VER3
:
12169 fprintf (file
, _(" [Version3 EABI]"));
12172 case EF_ARM_EABI_VER4
:
12173 fprintf (file
, _(" [Version4 EABI]"));
12176 case EF_ARM_EABI_VER5
:
12177 fprintf (file
, _(" [Version5 EABI]"));
12179 if (flags
& EF_ARM_ABI_FLOAT_SOFT
)
12180 fprintf (file
, _(" [soft-float ABI]"));
12182 if (flags
& EF_ARM_ABI_FLOAT_HARD
)
12183 fprintf (file
, _(" [hard-float ABI]"));
12185 flags
&= ~(EF_ARM_ABI_FLOAT_SOFT
| EF_ARM_ABI_FLOAT_HARD
);
12188 if (flags
& EF_ARM_BE8
)
12189 fprintf (file
, _(" [BE8]"));
12191 if (flags
& EF_ARM_LE8
)
12192 fprintf (file
, _(" [LE8]"));
12194 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
12198 fprintf (file
, _(" <EABI version unrecognised>"));
12202 flags
&= ~ EF_ARM_EABIMASK
;
12204 if (flags
& EF_ARM_RELEXEC
)
12205 fprintf (file
, _(" [relocatable executable]"));
12207 if (flags
& EF_ARM_HASENTRY
)
12208 fprintf (file
, _(" [has entry point]"));
12210 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
12213 fprintf (file
, _("<Unrecognised flag bits set>"));
12215 fputc ('\n', file
);
12221 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
12223 switch (ELF_ST_TYPE (elf_sym
->st_info
))
12225 case STT_ARM_TFUNC
:
12226 return ELF_ST_TYPE (elf_sym
->st_info
);
12228 case STT_ARM_16BIT
:
12229 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
12230 This allows us to distinguish between data used by Thumb instructions
12231 and non-data (which is probably code) inside Thumb regions of an
12233 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
12234 return ELF_ST_TYPE (elf_sym
->st_info
);
12245 elf32_arm_gc_mark_hook (asection
*sec
,
12246 struct bfd_link_info
*info
,
12247 Elf_Internal_Rela
*rel
,
12248 struct elf_link_hash_entry
*h
,
12249 Elf_Internal_Sym
*sym
)
12252 switch (ELF32_R_TYPE (rel
->r_info
))
12254 case R_ARM_GNU_VTINHERIT
:
12255 case R_ARM_GNU_VTENTRY
:
12259 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
12262 /* Update the got entry reference counts for the section being removed. */
12265 elf32_arm_gc_sweep_hook (bfd
* abfd
,
12266 struct bfd_link_info
* info
,
12268 const Elf_Internal_Rela
* relocs
)
12270 Elf_Internal_Shdr
*symtab_hdr
;
12271 struct elf_link_hash_entry
**sym_hashes
;
12272 bfd_signed_vma
*local_got_refcounts
;
12273 const Elf_Internal_Rela
*rel
, *relend
;
12274 struct elf32_arm_link_hash_table
* globals
;
12276 if (info
->relocatable
)
12279 globals
= elf32_arm_hash_table (info
);
12280 if (globals
== NULL
)
12283 elf_section_data (sec
)->local_dynrel
= NULL
;
12285 symtab_hdr
= & elf_symtab_hdr (abfd
);
12286 sym_hashes
= elf_sym_hashes (abfd
);
12287 local_got_refcounts
= elf_local_got_refcounts (abfd
);
12289 check_use_blx (globals
);
12291 relend
= relocs
+ sec
->reloc_count
;
12292 for (rel
= relocs
; rel
< relend
; rel
++)
12294 unsigned long r_symndx
;
12295 struct elf_link_hash_entry
*h
= NULL
;
12296 struct elf32_arm_link_hash_entry
*eh
;
12298 bfd_boolean call_reloc_p
;
12299 bfd_boolean may_become_dynamic_p
;
12300 bfd_boolean may_need_local_target_p
;
12301 union gotplt_union
*root_plt
;
12302 struct arm_plt_info
*arm_plt
;
12304 r_symndx
= ELF32_R_SYM (rel
->r_info
);
12305 if (r_symndx
>= symtab_hdr
->sh_info
)
12307 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
12308 while (h
->root
.type
== bfd_link_hash_indirect
12309 || h
->root
.type
== bfd_link_hash_warning
)
12310 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12312 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12314 call_reloc_p
= FALSE
;
12315 may_become_dynamic_p
= FALSE
;
12316 may_need_local_target_p
= FALSE
;
12318 r_type
= ELF32_R_TYPE (rel
->r_info
);
12319 r_type
= arm_real_reloc_type (globals
, r_type
);
12323 case R_ARM_GOT_PREL
:
12324 case R_ARM_TLS_GD32
:
12325 case R_ARM_TLS_IE32
:
12328 if (h
->got
.refcount
> 0)
12329 h
->got
.refcount
-= 1;
12331 else if (local_got_refcounts
!= NULL
)
12333 if (local_got_refcounts
[r_symndx
] > 0)
12334 local_got_refcounts
[r_symndx
] -= 1;
12338 case R_ARM_TLS_LDM32
:
12339 globals
->tls_ldm_got
.refcount
-= 1;
12347 case R_ARM_THM_CALL
:
12348 case R_ARM_THM_JUMP24
:
12349 case R_ARM_THM_JUMP19
:
12350 call_reloc_p
= TRUE
;
12351 may_need_local_target_p
= TRUE
;
12355 if (!globals
->vxworks_p
)
12357 may_need_local_target_p
= TRUE
;
12360 /* Fall through. */
12362 case R_ARM_ABS32_NOI
:
12364 case R_ARM_REL32_NOI
:
12365 case R_ARM_MOVW_ABS_NC
:
12366 case R_ARM_MOVT_ABS
:
12367 case R_ARM_MOVW_PREL_NC
:
12368 case R_ARM_MOVT_PREL
:
12369 case R_ARM_THM_MOVW_ABS_NC
:
12370 case R_ARM_THM_MOVT_ABS
:
12371 case R_ARM_THM_MOVW_PREL_NC
:
12372 case R_ARM_THM_MOVT_PREL
:
12373 /* Should the interworking branches be here also? */
12374 if ((info
->shared
|| globals
->root
.is_relocatable_executable
)
12375 && (sec
->flags
& SEC_ALLOC
) != 0)
12378 && (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
))
12380 call_reloc_p
= TRUE
;
12381 may_need_local_target_p
= TRUE
;
12384 may_become_dynamic_p
= TRUE
;
12387 may_need_local_target_p
= TRUE
;
12394 if (may_need_local_target_p
12395 && elf32_arm_get_plt_info (abfd
, eh
, r_symndx
, &root_plt
, &arm_plt
))
12397 /* If PLT refcount book-keeping is wrong and too low, we'll
12398 see a zero value (going to -1) for the root PLT reference
12400 if (root_plt
->refcount
>= 0)
12402 BFD_ASSERT (root_plt
->refcount
!= 0);
12403 root_plt
->refcount
-= 1;
12406 /* A value of -1 means the symbol has become local, forced
12407 or seeing a hidden definition. Any other negative value
12409 BFD_ASSERT (root_plt
->refcount
== -1);
12412 arm_plt
->noncall_refcount
--;
12414 if (r_type
== R_ARM_THM_CALL
)
12415 arm_plt
->maybe_thumb_refcount
--;
12417 if (r_type
== R_ARM_THM_JUMP24
12418 || r_type
== R_ARM_THM_JUMP19
)
12419 arm_plt
->thumb_refcount
--;
12422 if (may_become_dynamic_p
)
12424 struct elf_dyn_relocs
**pp
;
12425 struct elf_dyn_relocs
*p
;
12428 pp
= &(eh
->dyn_relocs
);
12431 Elf_Internal_Sym
*isym
;
12433 isym
= bfd_sym_from_r_symndx (&globals
->sym_cache
,
12437 pp
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
12441 for (; (p
= *pp
) != NULL
; pp
= &p
->next
)
12444 /* Everything must go for SEC. */
12454 /* Look through the relocs for a section during the first phase. */
12457 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
12458 asection
*sec
, const Elf_Internal_Rela
*relocs
)
12460 Elf_Internal_Shdr
*symtab_hdr
;
12461 struct elf_link_hash_entry
**sym_hashes
;
12462 const Elf_Internal_Rela
*rel
;
12463 const Elf_Internal_Rela
*rel_end
;
12466 struct elf32_arm_link_hash_table
*htab
;
12467 bfd_boolean call_reloc_p
;
12468 bfd_boolean may_become_dynamic_p
;
12469 bfd_boolean may_need_local_target_p
;
12470 unsigned long nsyms
;
12472 if (info
->relocatable
)
12475 BFD_ASSERT (is_arm_elf (abfd
));
12477 htab
= elf32_arm_hash_table (info
);
12483 /* Create dynamic sections for relocatable executables so that we can
12484 copy relocations. */
12485 if (htab
->root
.is_relocatable_executable
12486 && ! htab
->root
.dynamic_sections_created
)
12488 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
12492 if (htab
->root
.dynobj
== NULL
)
12493 htab
->root
.dynobj
= abfd
;
12494 if (!create_ifunc_sections (info
))
12497 dynobj
= htab
->root
.dynobj
;
12499 symtab_hdr
= & elf_symtab_hdr (abfd
);
12500 sym_hashes
= elf_sym_hashes (abfd
);
12501 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
12503 rel_end
= relocs
+ sec
->reloc_count
;
12504 for (rel
= relocs
; rel
< rel_end
; rel
++)
12506 Elf_Internal_Sym
*isym
;
12507 struct elf_link_hash_entry
*h
;
12508 struct elf32_arm_link_hash_entry
*eh
;
12509 unsigned long r_symndx
;
12512 r_symndx
= ELF32_R_SYM (rel
->r_info
);
12513 r_type
= ELF32_R_TYPE (rel
->r_info
);
12514 r_type
= arm_real_reloc_type (htab
, r_type
);
12516 if (r_symndx
>= nsyms
12517 /* PR 9934: It is possible to have relocations that do not
12518 refer to symbols, thus it is also possible to have an
12519 object file containing relocations but no symbol table. */
12520 && (r_symndx
> STN_UNDEF
|| nsyms
> 0))
12522 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"), abfd
,
12531 if (r_symndx
< symtab_hdr
->sh_info
)
12533 /* A local symbol. */
12534 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
12541 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
12542 while (h
->root
.type
== bfd_link_hash_indirect
12543 || h
->root
.type
== bfd_link_hash_warning
)
12544 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12546 /* PR15323, ref flags aren't set for references in the
12548 h
->root
.non_ir_ref
= 1;
12552 eh
= (struct elf32_arm_link_hash_entry
*) h
;
12554 call_reloc_p
= FALSE
;
12555 may_become_dynamic_p
= FALSE
;
12556 may_need_local_target_p
= FALSE
;
12558 /* Could be done earlier, if h were already available. */
12559 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
12563 case R_ARM_GOT_PREL
:
12564 case R_ARM_TLS_GD32
:
12565 case R_ARM_TLS_IE32
:
12566 case R_ARM_TLS_GOTDESC
:
12567 case R_ARM_TLS_DESCSEQ
:
12568 case R_ARM_THM_TLS_DESCSEQ
:
12569 case R_ARM_TLS_CALL
:
12570 case R_ARM_THM_TLS_CALL
:
12571 /* This symbol requires a global offset table entry. */
12573 int tls_type
, old_tls_type
;
12577 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
12579 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
12581 case R_ARM_TLS_GOTDESC
:
12582 case R_ARM_TLS_CALL
: case R_ARM_THM_TLS_CALL
:
12583 case R_ARM_TLS_DESCSEQ
: case R_ARM_THM_TLS_DESCSEQ
:
12584 tls_type
= GOT_TLS_GDESC
; break;
12586 default: tls_type
= GOT_NORMAL
; break;
12592 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
12596 /* This is a global offset table entry for a local symbol. */
12597 if (!elf32_arm_allocate_local_sym_info (abfd
))
12599 elf_local_got_refcounts (abfd
)[r_symndx
] += 1;
12600 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
12603 /* If a variable is accessed with both tls methods, two
12604 slots may be created. */
12605 if (GOT_TLS_GD_ANY_P (old_tls_type
)
12606 && GOT_TLS_GD_ANY_P (tls_type
))
12607 tls_type
|= old_tls_type
;
12609 /* We will already have issued an error message if there
12610 is a TLS/non-TLS mismatch, based on the symbol
12611 type. So just combine any TLS types needed. */
12612 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
12613 && tls_type
!= GOT_NORMAL
)
12614 tls_type
|= old_tls_type
;
12616 /* If the symbol is accessed in both IE and GDESC
12617 method, we're able to relax. Turn off the GDESC flag,
12618 without messing up with any other kind of tls types
12619 that may be involved */
12620 if ((tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_GDESC
))
12621 tls_type
&= ~GOT_TLS_GDESC
;
12623 if (old_tls_type
!= tls_type
)
12626 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
12628 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
12631 /* Fall through. */
12633 case R_ARM_TLS_LDM32
:
12634 if (r_type
== R_ARM_TLS_LDM32
)
12635 htab
->tls_ldm_got
.refcount
++;
12636 /* Fall through. */
12638 case R_ARM_GOTOFF32
:
12640 if (htab
->root
.sgot
== NULL
12641 && !create_got_section (htab
->root
.dynobj
, info
))
12650 case R_ARM_THM_CALL
:
12651 case R_ARM_THM_JUMP24
:
12652 case R_ARM_THM_JUMP19
:
12653 call_reloc_p
= TRUE
;
12654 may_need_local_target_p
= TRUE
;
12658 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
12659 ldr __GOTT_INDEX__ offsets. */
12660 if (!htab
->vxworks_p
)
12662 may_need_local_target_p
= TRUE
;
12665 /* Fall through. */
12667 case R_ARM_MOVW_ABS_NC
:
12668 case R_ARM_MOVT_ABS
:
12669 case R_ARM_THM_MOVW_ABS_NC
:
12670 case R_ARM_THM_MOVT_ABS
:
12673 (*_bfd_error_handler
)
12674 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
12675 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
12676 (h
) ? h
->root
.root
.string
: "a local symbol");
12677 bfd_set_error (bfd_error_bad_value
);
12681 /* Fall through. */
12683 case R_ARM_ABS32_NOI
:
12685 case R_ARM_REL32_NOI
:
12686 case R_ARM_MOVW_PREL_NC
:
12687 case R_ARM_MOVT_PREL
:
12688 case R_ARM_THM_MOVW_PREL_NC
:
12689 case R_ARM_THM_MOVT_PREL
:
12691 /* Should the interworking branches be listed here? */
12692 if ((info
->shared
|| htab
->root
.is_relocatable_executable
)
12693 && (sec
->flags
& SEC_ALLOC
) != 0)
12696 && (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
))
12698 /* In shared libraries and relocatable executables,
12699 we treat local relative references as calls;
12700 see the related SYMBOL_CALLS_LOCAL code in
12701 allocate_dynrelocs. */
12702 call_reloc_p
= TRUE
;
12703 may_need_local_target_p
= TRUE
;
12706 /* We are creating a shared library or relocatable
12707 executable, and this is a reloc against a global symbol,
12708 or a non-PC-relative reloc against a local symbol.
12709 We may need to copy the reloc into the output. */
12710 may_become_dynamic_p
= TRUE
;
12713 may_need_local_target_p
= TRUE
;
12716 /* This relocation describes the C++ object vtable hierarchy.
12717 Reconstruct it for later use during GC. */
12718 case R_ARM_GNU_VTINHERIT
:
12719 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
12723 /* This relocation describes which C++ vtable entries are actually
12724 used. Record for later use during GC. */
12725 case R_ARM_GNU_VTENTRY
:
12726 BFD_ASSERT (h
!= NULL
);
12728 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
12736 /* We may need a .plt entry if the function this reloc
12737 refers to is in a different object, regardless of the
12738 symbol's type. We can't tell for sure yet, because
12739 something later might force the symbol local. */
12741 else if (may_need_local_target_p
)
12742 /* If this reloc is in a read-only section, we might
12743 need a copy reloc. We can't check reliably at this
12744 stage whether the section is read-only, as input
12745 sections have not yet been mapped to output sections.
12746 Tentatively set the flag for now, and correct in
12747 adjust_dynamic_symbol. */
12748 h
->non_got_ref
= 1;
12751 if (may_need_local_target_p
12752 && (h
!= NULL
|| ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
))
12754 union gotplt_union
*root_plt
;
12755 struct arm_plt_info
*arm_plt
;
12756 struct arm_local_iplt_info
*local_iplt
;
12760 root_plt
= &h
->plt
;
12761 arm_plt
= &eh
->plt
;
12765 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
12766 if (local_iplt
== NULL
)
12768 root_plt
= &local_iplt
->root
;
12769 arm_plt
= &local_iplt
->arm
;
12772 /* If the symbol is a function that doesn't bind locally,
12773 this relocation will need a PLT entry. */
12774 if (root_plt
->refcount
!= -1)
12775 root_plt
->refcount
+= 1;
12778 arm_plt
->noncall_refcount
++;
12780 /* It's too early to use htab->use_blx here, so we have to
12781 record possible blx references separately from
12782 relocs that definitely need a thumb stub. */
12784 if (r_type
== R_ARM_THM_CALL
)
12785 arm_plt
->maybe_thumb_refcount
+= 1;
12787 if (r_type
== R_ARM_THM_JUMP24
12788 || r_type
== R_ARM_THM_JUMP19
)
12789 arm_plt
->thumb_refcount
+= 1;
12792 if (may_become_dynamic_p
)
12794 struct elf_dyn_relocs
*p
, **head
;
12796 /* Create a reloc section in dynobj. */
12797 if (sreloc
== NULL
)
12799 sreloc
= _bfd_elf_make_dynamic_reloc_section
12800 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
12802 if (sreloc
== NULL
)
12805 /* BPABI objects never have dynamic relocations mapped. */
12806 if (htab
->symbian_p
)
12810 flags
= bfd_get_section_flags (dynobj
, sreloc
);
12811 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
12812 bfd_set_section_flags (dynobj
, sreloc
, flags
);
12816 /* If this is a global symbol, count the number of
12817 relocations we need for this symbol. */
12819 head
= &((struct elf32_arm_link_hash_entry
*) h
)->dyn_relocs
;
12822 head
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
12828 if (p
== NULL
|| p
->sec
!= sec
)
12830 bfd_size_type amt
= sizeof *p
;
12832 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->root
.dynobj
, amt
);
12842 if (r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
12851 /* Unwinding tables are not referenced directly. This pass marks them as
12852 required if the corresponding code section is marked. */
12855 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
12856 elf_gc_mark_hook_fn gc_mark_hook
)
12859 Elf_Internal_Shdr
**elf_shdrp
;
12862 _bfd_elf_gc_mark_extra_sections (info
, gc_mark_hook
);
12864 /* Marking EH data may cause additional code sections to be marked,
12865 requiring multiple passes. */
12870 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12874 if (! is_arm_elf (sub
))
12877 elf_shdrp
= elf_elfsections (sub
);
12878 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12880 Elf_Internal_Shdr
*hdr
;
12882 hdr
= &elf_section_data (o
)->this_hdr
;
12883 if (hdr
->sh_type
== SHT_ARM_EXIDX
12885 && hdr
->sh_link
< elf_numsections (sub
)
12887 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
12890 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12900 /* Treat mapping symbols as special target symbols. */
12903 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
12905 return bfd_is_arm_special_symbol_name (sym
->name
,
12906 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
12909 /* This is a copy of elf_find_function() from elf.c except that
12910 ARM mapping symbols are ignored when looking for function names
12911 and STT_ARM_TFUNC is considered to a function type. */
12914 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
12915 asection
* section
,
12916 asymbol
** symbols
,
12918 const char ** filename_ptr
,
12919 const char ** functionname_ptr
)
12921 const char * filename
= NULL
;
12922 asymbol
* func
= NULL
;
12923 bfd_vma low_func
= 0;
12926 for (p
= symbols
; *p
!= NULL
; p
++)
12928 elf_symbol_type
*q
;
12930 q
= (elf_symbol_type
*) *p
;
12932 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
12937 filename
= bfd_asymbol_name (&q
->symbol
);
12940 case STT_ARM_TFUNC
:
12942 /* Skip mapping symbols. */
12943 if ((q
->symbol
.flags
& BSF_LOCAL
)
12944 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
12945 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
12947 /* Fall through. */
12948 if (bfd_get_section (&q
->symbol
) == section
12949 && q
->symbol
.value
>= low_func
12950 && q
->symbol
.value
<= offset
)
12952 func
= (asymbol
*) q
;
12953 low_func
= q
->symbol
.value
;
12963 *filename_ptr
= filename
;
12964 if (functionname_ptr
)
12965 *functionname_ptr
= bfd_asymbol_name (func
);
12971 /* Find the nearest line to a particular section and offset, for error
12972 reporting. This code is a duplicate of the code in elf.c, except
12973 that it uses arm_elf_find_function. */
12976 elf32_arm_find_nearest_line (bfd
* abfd
,
12977 asection
* section
,
12978 asymbol
** symbols
,
12980 const char ** filename_ptr
,
12981 const char ** functionname_ptr
,
12982 unsigned int * line_ptr
)
12984 bfd_boolean found
= FALSE
;
12986 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
12988 if (_bfd_dwarf2_find_nearest_line (abfd
, dwarf_debug_sections
,
12989 section
, symbols
, offset
,
12990 filename_ptr
, functionname_ptr
,
12992 & elf_tdata (abfd
)->dwarf2_find_line_info
))
12994 if (!*functionname_ptr
)
12995 arm_elf_find_function (abfd
, section
, symbols
, offset
,
12996 *filename_ptr
? NULL
: filename_ptr
,
13002 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
13003 & found
, filename_ptr
,
13004 functionname_ptr
, line_ptr
,
13005 & elf_tdata (abfd
)->line_info
))
13008 if (found
&& (*functionname_ptr
|| *line_ptr
))
13011 if (symbols
== NULL
)
13014 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
13015 filename_ptr
, functionname_ptr
))
13023 elf32_arm_find_inliner_info (bfd
* abfd
,
13024 const char ** filename_ptr
,
13025 const char ** functionname_ptr
,
13026 unsigned int * line_ptr
)
13029 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
13030 functionname_ptr
, line_ptr
,
13031 & elf_tdata (abfd
)->dwarf2_find_line_info
);
13035 /* Adjust a symbol defined by a dynamic object and referenced by a
13036 regular object. The current definition is in some section of the
13037 dynamic object, but we're not including those sections. We have to
13038 change the definition to something the rest of the link can
13042 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
13043 struct elf_link_hash_entry
* h
)
13047 struct elf32_arm_link_hash_entry
* eh
;
13048 struct elf32_arm_link_hash_table
*globals
;
13050 globals
= elf32_arm_hash_table (info
);
13051 if (globals
== NULL
)
13054 dynobj
= elf_hash_table (info
)->dynobj
;
13056 /* Make sure we know what is going on here. */
13057 BFD_ASSERT (dynobj
!= NULL
13059 || h
->type
== STT_GNU_IFUNC
13060 || h
->u
.weakdef
!= NULL
13063 && !h
->def_regular
)));
13065 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13067 /* If this is a function, put it in the procedure linkage table. We
13068 will fill in the contents of the procedure linkage table later,
13069 when we know the address of the .got section. */
13070 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
13072 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
13073 symbol binds locally. */
13074 if (h
->plt
.refcount
<= 0
13075 || (h
->type
!= STT_GNU_IFUNC
13076 && (SYMBOL_CALLS_LOCAL (info
, h
)
13077 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
13078 && h
->root
.type
== bfd_link_hash_undefweak
))))
13080 /* This case can occur if we saw a PLT32 reloc in an input
13081 file, but the symbol was never referred to by a dynamic
13082 object, or if all references were garbage collected. In
13083 such a case, we don't actually need to build a procedure
13084 linkage table, and we can just do a PC24 reloc instead. */
13085 h
->plt
.offset
= (bfd_vma
) -1;
13086 eh
->plt
.thumb_refcount
= 0;
13087 eh
->plt
.maybe_thumb_refcount
= 0;
13088 eh
->plt
.noncall_refcount
= 0;
13096 /* It's possible that we incorrectly decided a .plt reloc was
13097 needed for an R_ARM_PC24 or similar reloc to a non-function sym
13098 in check_relocs. We can't decide accurately between function
13099 and non-function syms in check-relocs; Objects loaded later in
13100 the link may change h->type. So fix it now. */
13101 h
->plt
.offset
= (bfd_vma
) -1;
13102 eh
->plt
.thumb_refcount
= 0;
13103 eh
->plt
.maybe_thumb_refcount
= 0;
13104 eh
->plt
.noncall_refcount
= 0;
13107 /* If this is a weak symbol, and there is a real definition, the
13108 processor independent code will have arranged for us to see the
13109 real definition first, and we can just use the same value. */
13110 if (h
->u
.weakdef
!= NULL
)
13112 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
13113 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
13114 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
13115 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
13119 /* If there are no non-GOT references, we do not need a copy
13121 if (!h
->non_got_ref
)
13124 /* This is a reference to a symbol defined by a dynamic object which
13125 is not a function. */
13127 /* If we are creating a shared library, we must presume that the
13128 only references to the symbol are via the global offset table.
13129 For such cases we need not do anything here; the relocations will
13130 be handled correctly by relocate_section. Relocatable executables
13131 can reference data in shared objects directly, so we don't need to
13132 do anything here. */
13133 if (info
->shared
|| globals
->root
.is_relocatable_executable
)
13136 /* We must allocate the symbol in our .dynbss section, which will
13137 become part of the .bss section of the executable. There will be
13138 an entry for this symbol in the .dynsym section. The dynamic
13139 object will contain position independent code, so all references
13140 from the dynamic object to this symbol will go through the global
13141 offset table. The dynamic linker will use the .dynsym entry to
13142 determine the address it must put in the global offset table, so
13143 both the dynamic object and the regular object will refer to the
13144 same memory location for the variable. */
13145 s
= bfd_get_linker_section (dynobj
, ".dynbss");
13146 BFD_ASSERT (s
!= NULL
);
13148 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
13149 copy the initial value out of the dynamic object and into the
13150 runtime process image. We need to remember the offset into the
13151 .rel(a).bss section we are going to use. */
13152 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
13156 srel
= bfd_get_linker_section (dynobj
, RELOC_SECTION (globals
, ".bss"));
13157 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
13161 return _bfd_elf_adjust_dynamic_copy (h
, s
);
13164 /* Allocate space in .plt, .got and associated reloc sections for
13168 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry
*h
, void * inf
)
13170 struct bfd_link_info
*info
;
13171 struct elf32_arm_link_hash_table
*htab
;
13172 struct elf32_arm_link_hash_entry
*eh
;
13173 struct elf_dyn_relocs
*p
;
13175 if (h
->root
.type
== bfd_link_hash_indirect
)
13178 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13180 info
= (struct bfd_link_info
*) inf
;
13181 htab
= elf32_arm_hash_table (info
);
13185 if ((htab
->root
.dynamic_sections_created
|| h
->type
== STT_GNU_IFUNC
)
13186 && h
->plt
.refcount
> 0)
13188 /* Make sure this symbol is output as a dynamic symbol.
13189 Undefined weak syms won't yet be marked as dynamic. */
13190 if (h
->dynindx
== -1
13191 && !h
->forced_local
)
13193 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13197 /* If the call in the PLT entry binds locally, the associated
13198 GOT entry should use an R_ARM_IRELATIVE relocation instead of
13199 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
13200 than the .plt section. */
13201 if (h
->type
== STT_GNU_IFUNC
&& SYMBOL_CALLS_LOCAL (info
, h
))
13204 if (eh
->plt
.noncall_refcount
== 0
13205 && SYMBOL_REFERENCES_LOCAL (info
, h
))
13206 /* All non-call references can be resolved directly.
13207 This means that they can (and in some cases, must)
13208 resolve directly to the run-time target, rather than
13209 to the PLT. That in turns means that any .got entry
13210 would be equal to the .igot.plt entry, so there's
13211 no point having both. */
13212 h
->got
.refcount
= 0;
13217 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
13219 elf32_arm_allocate_plt_entry (info
, eh
->is_iplt
, &h
->plt
, &eh
->plt
);
13221 /* If this symbol is not defined in a regular file, and we are
13222 not generating a shared library, then set the symbol to this
13223 location in the .plt. This is required to make function
13224 pointers compare as equal between the normal executable and
13225 the shared library. */
13227 && !h
->def_regular
)
13229 h
->root
.u
.def
.section
= htab
->root
.splt
;
13230 h
->root
.u
.def
.value
= h
->plt
.offset
;
13232 /* Make sure the function is not marked as Thumb, in case
13233 it is the target of an ABS32 relocation, which will
13234 point to the PLT entry. */
13235 h
->target_internal
= ST_BRANCH_TO_ARM
;
13238 htab
->next_tls_desc_index
++;
13240 /* VxWorks executables have a second set of relocations for
13241 each PLT entry. They go in a separate relocation section,
13242 which is processed by the kernel loader. */
13243 if (htab
->vxworks_p
&& !info
->shared
)
13245 /* There is a relocation for the initial PLT entry:
13246 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
13247 if (h
->plt
.offset
== htab
->plt_header_size
)
13248 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 1);
13250 /* There are two extra relocations for each subsequent
13251 PLT entry: an R_ARM_32 relocation for the GOT entry,
13252 and an R_ARM_32 relocation for the PLT entry. */
13253 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 2);
13258 h
->plt
.offset
= (bfd_vma
) -1;
13264 h
->plt
.offset
= (bfd_vma
) -1;
13268 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13269 eh
->tlsdesc_got
= (bfd_vma
) -1;
13271 if (h
->got
.refcount
> 0)
13275 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
13278 /* Make sure this symbol is output as a dynamic symbol.
13279 Undefined weak syms won't yet be marked as dynamic. */
13280 if (h
->dynindx
== -1
13281 && !h
->forced_local
)
13283 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13287 if (!htab
->symbian_p
)
13289 s
= htab
->root
.sgot
;
13290 h
->got
.offset
= s
->size
;
13292 if (tls_type
== GOT_UNKNOWN
)
13295 if (tls_type
== GOT_NORMAL
)
13296 /* Non-TLS symbols need one GOT slot. */
13300 if (tls_type
& GOT_TLS_GDESC
)
13302 /* R_ARM_TLS_DESC needs 2 GOT slots. */
13304 = (htab
->root
.sgotplt
->size
13305 - elf32_arm_compute_jump_table_size (htab
));
13306 htab
->root
.sgotplt
->size
+= 8;
13307 h
->got
.offset
= (bfd_vma
) -2;
13308 /* plt.got_offset needs to know there's a TLS_DESC
13309 reloc in the middle of .got.plt. */
13310 htab
->num_tls_desc
++;
13313 if (tls_type
& GOT_TLS_GD
)
13315 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
13316 the symbol is both GD and GDESC, got.offset may
13317 have been overwritten. */
13318 h
->got
.offset
= s
->size
;
13322 if (tls_type
& GOT_TLS_IE
)
13323 /* R_ARM_TLS_IE32 needs one GOT slot. */
13327 dyn
= htab
->root
.dynamic_sections_created
;
13330 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
13332 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
13335 if (tls_type
!= GOT_NORMAL
13336 && (info
->shared
|| indx
!= 0)
13337 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
13338 || h
->root
.type
!= bfd_link_hash_undefweak
))
13340 if (tls_type
& GOT_TLS_IE
)
13341 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13343 if (tls_type
& GOT_TLS_GD
)
13344 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13346 if (tls_type
& GOT_TLS_GDESC
)
13348 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
13349 /* GDESC needs a trampoline to jump to. */
13350 htab
->tls_trampoline
= -1;
13353 /* Only GD needs it. GDESC just emits one relocation per
13355 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
13356 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13358 else if (indx
!= -1 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
13360 if (htab
->root
.dynamic_sections_created
)
13361 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
13362 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13364 else if (h
->type
== STT_GNU_IFUNC
13365 && eh
->plt
.noncall_refcount
== 0)
13366 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
13367 they all resolve dynamically instead. Reserve room for the
13368 GOT entry's R_ARM_IRELATIVE relocation. */
13369 elf32_arm_allocate_irelocs (info
, htab
->root
.srelgot
, 1);
13370 else if (info
->shared
&& (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
13371 || h
->root
.type
!= bfd_link_hash_undefweak
))
13372 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
13373 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13377 h
->got
.offset
= (bfd_vma
) -1;
13379 /* Allocate stubs for exported Thumb functions on v4t. */
13380 if (!htab
->use_blx
&& h
->dynindx
!= -1
13382 && h
->target_internal
== ST_BRANCH_TO_THUMB
13383 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
13385 struct elf_link_hash_entry
* th
;
13386 struct bfd_link_hash_entry
* bh
;
13387 struct elf_link_hash_entry
* myh
;
13391 /* Create a new symbol to regist the real location of the function. */
13392 s
= h
->root
.u
.def
.section
;
13393 sprintf (name
, "__real_%s", h
->root
.root
.string
);
13394 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
13395 name
, BSF_GLOBAL
, s
,
13396 h
->root
.u
.def
.value
,
13397 NULL
, TRUE
, FALSE
, &bh
);
13399 myh
= (struct elf_link_hash_entry
*) bh
;
13400 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
13401 myh
->forced_local
= 1;
13402 myh
->target_internal
= ST_BRANCH_TO_THUMB
;
13403 eh
->export_glue
= myh
;
13404 th
= record_arm_to_thumb_glue (info
, h
);
13405 /* Point the symbol at the stub. */
13406 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
13407 h
->target_internal
= ST_BRANCH_TO_ARM
;
13408 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
13409 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
13412 if (eh
->dyn_relocs
== NULL
)
13415 /* In the shared -Bsymbolic case, discard space allocated for
13416 dynamic pc-relative relocs against symbols which turn out to be
13417 defined in regular objects. For the normal shared case, discard
13418 space for pc-relative relocs that have become local due to symbol
13419 visibility changes. */
13421 if (info
->shared
|| htab
->root
.is_relocatable_executable
)
13423 /* The only relocs that use pc_count are R_ARM_REL32 and
13424 R_ARM_REL32_NOI, which will appear on something like
13425 ".long foo - .". We want calls to protected symbols to resolve
13426 directly to the function rather than going via the plt. If people
13427 want function pointer comparisons to work as expected then they
13428 should avoid writing assembly like ".long foo - .". */
13429 if (SYMBOL_CALLS_LOCAL (info
, h
))
13431 struct elf_dyn_relocs
**pp
;
13433 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
13435 p
->count
-= p
->pc_count
;
13444 if (htab
->vxworks_p
)
13446 struct elf_dyn_relocs
**pp
;
13448 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
13450 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
13457 /* Also discard relocs on undefined weak syms with non-default
13459 if (eh
->dyn_relocs
!= NULL
13460 && h
->root
.type
== bfd_link_hash_undefweak
)
13462 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
13463 eh
->dyn_relocs
= NULL
;
13465 /* Make sure undefined weak symbols are output as a dynamic
13467 else if (h
->dynindx
== -1
13468 && !h
->forced_local
)
13470 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13475 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
13476 && h
->root
.type
== bfd_link_hash_new
)
13478 /* Output absolute symbols so that we can create relocations
13479 against them. For normal symbols we output a relocation
13480 against the section that contains them. */
13481 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13488 /* For the non-shared case, discard space for relocs against
13489 symbols which turn out to need copy relocs or are not
13492 if (!h
->non_got_ref
13493 && ((h
->def_dynamic
13494 && !h
->def_regular
)
13495 || (htab
->root
.dynamic_sections_created
13496 && (h
->root
.type
== bfd_link_hash_undefweak
13497 || h
->root
.type
== bfd_link_hash_undefined
))))
13499 /* Make sure this symbol is output as a dynamic symbol.
13500 Undefined weak syms won't yet be marked as dynamic. */
13501 if (h
->dynindx
== -1
13502 && !h
->forced_local
)
13504 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
13508 /* If that succeeded, we know we'll be keeping all the
13510 if (h
->dynindx
!= -1)
13514 eh
->dyn_relocs
= NULL
;
13519 /* Finally, allocate space. */
13520 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13522 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
13523 if (h
->type
== STT_GNU_IFUNC
13524 && eh
->plt
.noncall_refcount
== 0
13525 && SYMBOL_REFERENCES_LOCAL (info
, h
))
13526 elf32_arm_allocate_irelocs (info
, sreloc
, p
->count
);
13528 elf32_arm_allocate_dynrelocs (info
, sreloc
, p
->count
);
13534 /* Find any dynamic relocs that apply to read-only sections. */
13537 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
13539 struct elf32_arm_link_hash_entry
* eh
;
13540 struct elf_dyn_relocs
* p
;
13542 eh
= (struct elf32_arm_link_hash_entry
*) h
;
13543 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13545 asection
*s
= p
->sec
;
13547 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
13549 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
13551 info
->flags
|= DF_TEXTREL
;
13553 /* Not an error, just cut short the traversal. */
13561 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
13564 struct elf32_arm_link_hash_table
*globals
;
13566 globals
= elf32_arm_hash_table (info
);
13567 if (globals
== NULL
)
13570 globals
->byteswap_code
= byteswap_code
;
13573 /* Set the sizes of the dynamic sections. */
13576 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
13577 struct bfd_link_info
* info
)
13582 bfd_boolean relocs
;
13584 struct elf32_arm_link_hash_table
*htab
;
13586 htab
= elf32_arm_hash_table (info
);
13590 dynobj
= elf_hash_table (info
)->dynobj
;
13591 BFD_ASSERT (dynobj
!= NULL
);
13592 check_use_blx (htab
);
13594 if (elf_hash_table (info
)->dynamic_sections_created
)
13596 /* Set the contents of the .interp section to the interpreter. */
13597 if (info
->executable
)
13599 s
= bfd_get_linker_section (dynobj
, ".interp");
13600 BFD_ASSERT (s
!= NULL
);
13601 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
13602 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
13606 /* Set up .got offsets for local syms, and space for local dynamic
13608 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
13610 bfd_signed_vma
*local_got
;
13611 bfd_signed_vma
*end_local_got
;
13612 struct arm_local_iplt_info
**local_iplt_ptr
, *local_iplt
;
13613 char *local_tls_type
;
13614 bfd_vma
*local_tlsdesc_gotent
;
13615 bfd_size_type locsymcount
;
13616 Elf_Internal_Shdr
*symtab_hdr
;
13618 bfd_boolean is_vxworks
= htab
->vxworks_p
;
13619 unsigned int symndx
;
13621 if (! is_arm_elf (ibfd
))
13624 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
13626 struct elf_dyn_relocs
*p
;
13628 for (p
= (struct elf_dyn_relocs
*)
13629 elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
13631 if (!bfd_is_abs_section (p
->sec
)
13632 && bfd_is_abs_section (p
->sec
->output_section
))
13634 /* Input section has been discarded, either because
13635 it is a copy of a linkonce section or due to
13636 linker script /DISCARD/, so we'll be discarding
13639 else if (is_vxworks
13640 && strcmp (p
->sec
->output_section
->name
,
13643 /* Relocations in vxworks .tls_vars sections are
13644 handled specially by the loader. */
13646 else if (p
->count
!= 0)
13648 srel
= elf_section_data (p
->sec
)->sreloc
;
13649 elf32_arm_allocate_dynrelocs (info
, srel
, p
->count
);
13650 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
13651 info
->flags
|= DF_TEXTREL
;
13656 local_got
= elf_local_got_refcounts (ibfd
);
13660 symtab_hdr
= & elf_symtab_hdr (ibfd
);
13661 locsymcount
= symtab_hdr
->sh_info
;
13662 end_local_got
= local_got
+ locsymcount
;
13663 local_iplt_ptr
= elf32_arm_local_iplt (ibfd
);
13664 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
13665 local_tlsdesc_gotent
= elf32_arm_local_tlsdesc_gotent (ibfd
);
13667 s
= htab
->root
.sgot
;
13668 srel
= htab
->root
.srelgot
;
13669 for (; local_got
< end_local_got
;
13670 ++local_got
, ++local_iplt_ptr
, ++local_tls_type
,
13671 ++local_tlsdesc_gotent
, ++symndx
)
13673 *local_tlsdesc_gotent
= (bfd_vma
) -1;
13674 local_iplt
= *local_iplt_ptr
;
13675 if (local_iplt
!= NULL
)
13677 struct elf_dyn_relocs
*p
;
13679 if (local_iplt
->root
.refcount
> 0)
13681 elf32_arm_allocate_plt_entry (info
, TRUE
,
13684 if (local_iplt
->arm
.noncall_refcount
== 0)
13685 /* All references to the PLT are calls, so all
13686 non-call references can resolve directly to the
13687 run-time target. This means that the .got entry
13688 would be the same as the .igot.plt entry, so there's
13689 no point creating both. */
13694 BFD_ASSERT (local_iplt
->arm
.noncall_refcount
== 0);
13695 local_iplt
->root
.offset
= (bfd_vma
) -1;
13698 for (p
= local_iplt
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
13702 psrel
= elf_section_data (p
->sec
)->sreloc
;
13703 if (local_iplt
->arm
.noncall_refcount
== 0)
13704 elf32_arm_allocate_irelocs (info
, psrel
, p
->count
);
13706 elf32_arm_allocate_dynrelocs (info
, psrel
, p
->count
);
13709 if (*local_got
> 0)
13711 Elf_Internal_Sym
*isym
;
13713 *local_got
= s
->size
;
13714 if (*local_tls_type
& GOT_TLS_GD
)
13715 /* TLS_GD relocs need an 8-byte structure in the GOT. */
13717 if (*local_tls_type
& GOT_TLS_GDESC
)
13719 *local_tlsdesc_gotent
= htab
->root
.sgotplt
->size
13720 - elf32_arm_compute_jump_table_size (htab
);
13721 htab
->root
.sgotplt
->size
+= 8;
13722 *local_got
= (bfd_vma
) -2;
13723 /* plt.got_offset needs to know there's a TLS_DESC
13724 reloc in the middle of .got.plt. */
13725 htab
->num_tls_desc
++;
13727 if (*local_tls_type
& GOT_TLS_IE
)
13730 if (*local_tls_type
& GOT_NORMAL
)
13732 /* If the symbol is both GD and GDESC, *local_got
13733 may have been overwritten. */
13734 *local_got
= s
->size
;
13738 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, symndx
);
13742 /* If all references to an STT_GNU_IFUNC PLT are calls,
13743 then all non-call references, including this GOT entry,
13744 resolve directly to the run-time target. */
13745 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
13746 && (local_iplt
== NULL
13747 || local_iplt
->arm
.noncall_refcount
== 0))
13748 elf32_arm_allocate_irelocs (info
, srel
, 1);
13749 else if (info
->shared
|| output_bfd
->flags
& DYNAMIC
)
13751 if ((info
->shared
&& !(*local_tls_type
& GOT_TLS_GDESC
))
13752 || *local_tls_type
& GOT_TLS_GD
)
13753 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
13755 if (info
->shared
&& *local_tls_type
& GOT_TLS_GDESC
)
13757 elf32_arm_allocate_dynrelocs (info
,
13758 htab
->root
.srelplt
, 1);
13759 htab
->tls_trampoline
= -1;
13764 *local_got
= (bfd_vma
) -1;
13768 if (htab
->tls_ldm_got
.refcount
> 0)
13770 /* Allocate two GOT entries and one dynamic relocation (if necessary)
13771 for R_ARM_TLS_LDM32 relocations. */
13772 htab
->tls_ldm_got
.offset
= htab
->root
.sgot
->size
;
13773 htab
->root
.sgot
->size
+= 8;
13775 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
13778 htab
->tls_ldm_got
.offset
= -1;
13780 /* Allocate global sym .plt and .got entries, and space for global
13781 sym dynamic relocs. */
13782 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs_for_symbol
, info
);
13784 /* Here we rummage through the found bfds to collect glue information. */
13785 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
13787 if (! is_arm_elf (ibfd
))
13790 /* Initialise mapping tables for code/data. */
13791 bfd_elf32_arm_init_maps (ibfd
);
13793 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
13794 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
))
13795 /* xgettext:c-format */
13796 _bfd_error_handler (_("Errors encountered processing file %s"),
13800 /* Allocate space for the glue sections now that we've sized them. */
13801 bfd_elf32_arm_allocate_interworking_sections (info
);
13803 /* For every jump slot reserved in the sgotplt, reloc_count is
13804 incremented. However, when we reserve space for TLS descriptors,
13805 it's not incremented, so in order to compute the space reserved
13806 for them, it suffices to multiply the reloc count by the jump
13808 if (htab
->root
.srelplt
)
13809 htab
->sgotplt_jump_table_size
= elf32_arm_compute_jump_table_size(htab
);
13811 if (htab
->tls_trampoline
)
13813 if (htab
->root
.splt
->size
== 0)
13814 htab
->root
.splt
->size
+= htab
->plt_header_size
;
13816 htab
->tls_trampoline
= htab
->root
.splt
->size
;
13817 htab
->root
.splt
->size
+= htab
->plt_entry_size
;
13819 /* If we're not using lazy TLS relocations, don't generate the
13820 PLT and GOT entries they require. */
13821 if (!(info
->flags
& DF_BIND_NOW
))
13823 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
13824 htab
->root
.sgot
->size
+= 4;
13826 htab
->dt_tlsdesc_plt
= htab
->root
.splt
->size
;
13827 htab
->root
.splt
->size
+= 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline
);
13831 /* The check_relocs and adjust_dynamic_symbol entry points have
13832 determined the sizes of the various dynamic sections. Allocate
13833 memory for them. */
13836 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
13840 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
13843 /* It's OK to base decisions on the section name, because none
13844 of the dynobj section names depend upon the input files. */
13845 name
= bfd_get_section_name (dynobj
, s
);
13847 if (s
== htab
->root
.splt
)
13849 /* Remember whether there is a PLT. */
13850 plt
= s
->size
!= 0;
13852 else if (CONST_STRNEQ (name
, ".rel"))
13856 /* Remember whether there are any reloc sections other
13857 than .rel(a).plt and .rela.plt.unloaded. */
13858 if (s
!= htab
->root
.srelplt
&& s
!= htab
->srelplt2
)
13861 /* We use the reloc_count field as a counter if we need
13862 to copy relocs into the output file. */
13863 s
->reloc_count
= 0;
13866 else if (s
!= htab
->root
.sgot
13867 && s
!= htab
->root
.sgotplt
13868 && s
!= htab
->root
.iplt
13869 && s
!= htab
->root
.igotplt
13870 && s
!= htab
->sdynbss
)
13872 /* It's not one of our sections, so don't allocate space. */
13878 /* If we don't need this section, strip it from the
13879 output file. This is mostly to handle .rel(a).bss and
13880 .rel(a).plt. We must create both sections in
13881 create_dynamic_sections, because they must be created
13882 before the linker maps input sections to output
13883 sections. The linker does that before
13884 adjust_dynamic_symbol is called, and it is that
13885 function which decides whether anything needs to go
13886 into these sections. */
13887 s
->flags
|= SEC_EXCLUDE
;
13891 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
13894 /* Allocate memory for the section contents. */
13895 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
13896 if (s
->contents
== NULL
)
13900 if (elf_hash_table (info
)->dynamic_sections_created
)
13902 /* Add some entries to the .dynamic section. We fill in the
13903 values later, in elf32_arm_finish_dynamic_sections, but we
13904 must add the entries now so that we get the correct size for
13905 the .dynamic section. The DT_DEBUG entry is filled in by the
13906 dynamic linker and used by the debugger. */
13907 #define add_dynamic_entry(TAG, VAL) \
13908 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
13910 if (info
->executable
)
13912 if (!add_dynamic_entry (DT_DEBUG
, 0))
13918 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
13919 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
13920 || !add_dynamic_entry (DT_PLTREL
,
13921 htab
->use_rel
? DT_REL
: DT_RELA
)
13922 || !add_dynamic_entry (DT_JMPREL
, 0))
13925 if (htab
->dt_tlsdesc_plt
&&
13926 (!add_dynamic_entry (DT_TLSDESC_PLT
,0)
13927 || !add_dynamic_entry (DT_TLSDESC_GOT
,0)))
13935 if (!add_dynamic_entry (DT_REL
, 0)
13936 || !add_dynamic_entry (DT_RELSZ
, 0)
13937 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
13942 if (!add_dynamic_entry (DT_RELA
, 0)
13943 || !add_dynamic_entry (DT_RELASZ
, 0)
13944 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
13949 /* If any dynamic relocs apply to a read-only section,
13950 then we need a DT_TEXTREL entry. */
13951 if ((info
->flags
& DF_TEXTREL
) == 0)
13952 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
13955 if ((info
->flags
& DF_TEXTREL
) != 0)
13957 if (!add_dynamic_entry (DT_TEXTREL
, 0))
13960 if (htab
->vxworks_p
13961 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
13964 #undef add_dynamic_entry
13969 /* Size sections even though they're not dynamic. We use it to setup
13970 _TLS_MODULE_BASE_, if needed. */
13973 elf32_arm_always_size_sections (bfd
*output_bfd
,
13974 struct bfd_link_info
*info
)
13978 if (info
->relocatable
)
13981 tls_sec
= elf_hash_table (info
)->tls_sec
;
13985 struct elf_link_hash_entry
*tlsbase
;
13987 tlsbase
= elf_link_hash_lookup
13988 (elf_hash_table (info
), "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
13992 struct bfd_link_hash_entry
*bh
= NULL
;
13993 const struct elf_backend_data
*bed
13994 = get_elf_backend_data (output_bfd
);
13996 if (!(_bfd_generic_link_add_one_symbol
13997 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
13998 tls_sec
, 0, NULL
, FALSE
,
13999 bed
->collect
, &bh
)))
14002 tlsbase
->type
= STT_TLS
;
14003 tlsbase
= (struct elf_link_hash_entry
*)bh
;
14004 tlsbase
->def_regular
= 1;
14005 tlsbase
->other
= STV_HIDDEN
;
14006 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
14012 /* Finish up dynamic symbol handling. We set the contents of various
14013 dynamic sections here. */
14016 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
14017 struct bfd_link_info
* info
,
14018 struct elf_link_hash_entry
* h
,
14019 Elf_Internal_Sym
* sym
)
14021 struct elf32_arm_link_hash_table
*htab
;
14022 struct elf32_arm_link_hash_entry
*eh
;
14024 htab
= elf32_arm_hash_table (info
);
14028 eh
= (struct elf32_arm_link_hash_entry
*) h
;
14030 if (h
->plt
.offset
!= (bfd_vma
) -1)
14034 BFD_ASSERT (h
->dynindx
!= -1);
14035 if (! elf32_arm_populate_plt_entry (output_bfd
, info
, &h
->plt
, &eh
->plt
,
14040 if (!h
->def_regular
)
14042 /* Mark the symbol as undefined, rather than as defined in
14043 the .plt section. Leave the value alone. */
14044 sym
->st_shndx
= SHN_UNDEF
;
14045 /* If the symbol is weak, we do need to clear the value.
14046 Otherwise, the PLT entry would provide a definition for
14047 the symbol even if the symbol wasn't defined anywhere,
14048 and so the symbol would never be NULL. */
14049 if (!h
->ref_regular_nonweak
)
14052 else if (eh
->is_iplt
&& eh
->plt
.noncall_refcount
!= 0)
14054 /* At least one non-call relocation references this .iplt entry,
14055 so the .iplt entry is the function's canonical address. */
14056 sym
->st_info
= ELF_ST_INFO (ELF_ST_BIND (sym
->st_info
), STT_FUNC
);
14057 sym
->st_target_internal
= ST_BRANCH_TO_ARM
;
14058 sym
->st_shndx
= (_bfd_elf_section_from_bfd_section
14059 (output_bfd
, htab
->root
.iplt
->output_section
));
14060 sym
->st_value
= (h
->plt
.offset
14061 + htab
->root
.iplt
->output_section
->vma
14062 + htab
->root
.iplt
->output_offset
);
14069 Elf_Internal_Rela rel
;
14071 /* This symbol needs a copy reloc. Set it up. */
14072 BFD_ASSERT (h
->dynindx
!= -1
14073 && (h
->root
.type
== bfd_link_hash_defined
14074 || h
->root
.type
== bfd_link_hash_defweak
));
14077 BFD_ASSERT (s
!= NULL
);
14080 rel
.r_offset
= (h
->root
.u
.def
.value
14081 + h
->root
.u
.def
.section
->output_section
->vma
14082 + h
->root
.u
.def
.section
->output_offset
);
14083 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
14084 elf32_arm_add_dynreloc (output_bfd
, info
, s
, &rel
);
14087 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
14088 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
14089 to the ".got" section. */
14090 if (h
== htab
->root
.hdynamic
14091 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
14092 sym
->st_shndx
= SHN_ABS
;
14098 arm_put_trampoline (struct elf32_arm_link_hash_table
*htab
, bfd
*output_bfd
,
14100 const unsigned long *template, unsigned count
)
14104 for (ix
= 0; ix
!= count
; ix
++)
14106 unsigned long insn
= template[ix
];
14108 /* Emit mov pc,rx if bx is not permitted. */
14109 if (htab
->fix_v4bx
== 1 && (insn
& 0x0ffffff0) == 0x012fff10)
14110 insn
= (insn
& 0xf000000f) | 0x01a0f000;
14111 put_arm_insn (htab
, output_bfd
, insn
, (char *)contents
+ ix
*4);
14115 /* Install the special first PLT entry for elf32-arm-nacl. Unlike
14116 other variants, NaCl needs this entry in a static executable's
14117 .iplt too. When we're handling that case, GOT_DISPLACEMENT is
14118 zero. For .iplt really only the last bundle is useful, and .iplt
14119 could have a shorter first entry, with each individual PLT entry's
14120 relative branch calculated differently so it targets the last
14121 bundle instead of the instruction before it (labelled .Lplt_tail
14122 above). But it's simpler to keep the size and layout of PLT0
14123 consistent with the dynamic case, at the cost of some dead code at
14124 the start of .iplt and the one dead store to the stack at the start
14127 arm_nacl_put_plt0 (struct elf32_arm_link_hash_table
*htab
, bfd
*output_bfd
,
14128 asection
*plt
, bfd_vma got_displacement
)
14132 put_arm_insn (htab
, output_bfd
,
14133 elf32_arm_nacl_plt0_entry
[0]
14134 | arm_movw_immediate (got_displacement
),
14135 plt
->contents
+ 0);
14136 put_arm_insn (htab
, output_bfd
,
14137 elf32_arm_nacl_plt0_entry
[1]
14138 | arm_movt_immediate (got_displacement
),
14139 plt
->contents
+ 4);
14141 for (i
= 2; i
< ARRAY_SIZE (elf32_arm_nacl_plt0_entry
); ++i
)
14142 put_arm_insn (htab
, output_bfd
,
14143 elf32_arm_nacl_plt0_entry
[i
],
14144 plt
->contents
+ (i
* 4));
14147 /* Finish up the dynamic sections. */
14150 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
14155 struct elf32_arm_link_hash_table
*htab
;
14157 htab
= elf32_arm_hash_table (info
);
14161 dynobj
= elf_hash_table (info
)->dynobj
;
14163 sgot
= htab
->root
.sgotplt
;
14164 /* A broken linker script might have discarded the dynamic sections.
14165 Catch this here so that we do not seg-fault later on. */
14166 if (sgot
!= NULL
&& bfd_is_abs_section (sgot
->output_section
))
14168 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
14170 if (elf_hash_table (info
)->dynamic_sections_created
)
14173 Elf32_External_Dyn
*dyncon
, *dynconend
;
14175 splt
= htab
->root
.splt
;
14176 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
14177 BFD_ASSERT (htab
->symbian_p
|| sgot
!= NULL
);
14179 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
14180 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
14182 for (; dyncon
< dynconend
; dyncon
++)
14184 Elf_Internal_Dyn dyn
;
14188 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
14195 if (htab
->vxworks_p
14196 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
14197 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14202 goto get_vma_if_bpabi
;
14205 goto get_vma_if_bpabi
;
14208 goto get_vma_if_bpabi
;
14210 name
= ".gnu.version";
14211 goto get_vma_if_bpabi
;
14213 name
= ".gnu.version_d";
14214 goto get_vma_if_bpabi
;
14216 name
= ".gnu.version_r";
14217 goto get_vma_if_bpabi
;
14223 name
= RELOC_SECTION (htab
, ".plt");
14225 s
= bfd_get_section_by_name (output_bfd
, name
);
14228 /* PR ld/14397: Issue an error message if a required section is missing. */
14229 (*_bfd_error_handler
)
14230 (_("error: required section '%s' not found in the linker script"), name
);
14231 bfd_set_error (bfd_error_invalid_operation
);
14234 if (!htab
->symbian_p
)
14235 dyn
.d_un
.d_ptr
= s
->vma
;
14237 /* In the BPABI, tags in the PT_DYNAMIC section point
14238 at the file offset, not the memory address, for the
14239 convenience of the post linker. */
14240 dyn
.d_un
.d_ptr
= s
->filepos
;
14241 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14245 if (htab
->symbian_p
)
14250 s
= htab
->root
.srelplt
;
14251 BFD_ASSERT (s
!= NULL
);
14252 dyn
.d_un
.d_val
= s
->size
;
14253 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14258 if (!htab
->symbian_p
)
14260 /* My reading of the SVR4 ABI indicates that the
14261 procedure linkage table relocs (DT_JMPREL) should be
14262 included in the overall relocs (DT_REL). This is
14263 what Solaris does. However, UnixWare can not handle
14264 that case. Therefore, we override the DT_RELSZ entry
14265 here to make it not include the JMPREL relocs. Since
14266 the linker script arranges for .rel(a).plt to follow all
14267 other relocation sections, we don't have to worry
14268 about changing the DT_REL entry. */
14269 s
= htab
->root
.srelplt
;
14271 dyn
.d_un
.d_val
-= s
->size
;
14272 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14275 /* Fall through. */
14279 /* In the BPABI, the DT_REL tag must point at the file
14280 offset, not the VMA, of the first relocation
14281 section. So, we use code similar to that in
14282 elflink.c, but do not check for SHF_ALLOC on the
14283 relcoation section, since relocations sections are
14284 never allocated under the BPABI. The comments above
14285 about Unixware notwithstanding, we include all of the
14286 relocations here. */
14287 if (htab
->symbian_p
)
14290 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
14291 ? SHT_REL
: SHT_RELA
);
14292 dyn
.d_un
.d_val
= 0;
14293 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
14295 Elf_Internal_Shdr
*hdr
14296 = elf_elfsections (output_bfd
)[i
];
14297 if (hdr
->sh_type
== type
)
14299 if (dyn
.d_tag
== DT_RELSZ
14300 || dyn
.d_tag
== DT_RELASZ
)
14301 dyn
.d_un
.d_val
+= hdr
->sh_size
;
14302 else if ((ufile_ptr
) hdr
->sh_offset
14303 <= dyn
.d_un
.d_val
- 1)
14304 dyn
.d_un
.d_val
= hdr
->sh_offset
;
14307 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14311 case DT_TLSDESC_PLT
:
14312 s
= htab
->root
.splt
;
14313 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
14314 + htab
->dt_tlsdesc_plt
);
14315 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14318 case DT_TLSDESC_GOT
:
14319 s
= htab
->root
.sgot
;
14320 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
14321 + htab
->dt_tlsdesc_got
);
14322 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14325 /* Set the bottom bit of DT_INIT/FINI if the
14326 corresponding function is Thumb. */
14328 name
= info
->init_function
;
14331 name
= info
->fini_function
;
14333 /* If it wasn't set by elf_bfd_final_link
14334 then there is nothing to adjust. */
14335 if (dyn
.d_un
.d_val
!= 0)
14337 struct elf_link_hash_entry
* eh
;
14339 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
14340 FALSE
, FALSE
, TRUE
);
14341 if (eh
!= NULL
&& eh
->target_internal
== ST_BRANCH_TO_THUMB
)
14343 dyn
.d_un
.d_val
|= 1;
14344 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
14351 /* Fill in the first entry in the procedure linkage table. */
14352 if (splt
->size
> 0 && htab
->plt_header_size
)
14354 const bfd_vma
*plt0_entry
;
14355 bfd_vma got_address
, plt_address
, got_displacement
;
14357 /* Calculate the addresses of the GOT and PLT. */
14358 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
14359 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
14361 if (htab
->vxworks_p
)
14363 /* The VxWorks GOT is relocated by the dynamic linker.
14364 Therefore, we must emit relocations rather than simply
14365 computing the values now. */
14366 Elf_Internal_Rela rel
;
14368 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
14369 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
14370 splt
->contents
+ 0);
14371 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
14372 splt
->contents
+ 4);
14373 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
14374 splt
->contents
+ 8);
14375 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
14377 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
14378 rel
.r_offset
= plt_address
+ 12;
14379 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
14381 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
14382 htab
->srelplt2
->contents
);
14384 else if (htab
->nacl_p
)
14385 arm_nacl_put_plt0 (htab
, output_bfd
, splt
,
14386 got_address
+ 8 - (plt_address
+ 16));
14389 got_displacement
= got_address
- (plt_address
+ 16);
14391 plt0_entry
= elf32_arm_plt0_entry
;
14392 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
14393 splt
->contents
+ 0);
14394 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
14395 splt
->contents
+ 4);
14396 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
14397 splt
->contents
+ 8);
14398 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
14399 splt
->contents
+ 12);
14401 #ifdef FOUR_WORD_PLT
14402 /* The displacement value goes in the otherwise-unused
14403 last word of the second entry. */
14404 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
14406 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
14411 /* UnixWare sets the entsize of .plt to 4, although that doesn't
14412 really seem like the right value. */
14413 if (splt
->output_section
->owner
== output_bfd
)
14414 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
14416 if (htab
->dt_tlsdesc_plt
)
14418 bfd_vma got_address
14419 = sgot
->output_section
->vma
+ sgot
->output_offset
;
14420 bfd_vma gotplt_address
= (htab
->root
.sgot
->output_section
->vma
14421 + htab
->root
.sgot
->output_offset
);
14422 bfd_vma plt_address
14423 = splt
->output_section
->vma
+ splt
->output_offset
;
14425 arm_put_trampoline (htab
, output_bfd
,
14426 splt
->contents
+ htab
->dt_tlsdesc_plt
,
14427 dl_tlsdesc_lazy_trampoline
, 6);
14429 bfd_put_32 (output_bfd
,
14430 gotplt_address
+ htab
->dt_tlsdesc_got
14431 - (plt_address
+ htab
->dt_tlsdesc_plt
)
14432 - dl_tlsdesc_lazy_trampoline
[6],
14433 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24);
14434 bfd_put_32 (output_bfd
,
14435 got_address
- (plt_address
+ htab
->dt_tlsdesc_plt
)
14436 - dl_tlsdesc_lazy_trampoline
[7],
14437 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24 + 4);
14440 if (htab
->tls_trampoline
)
14442 arm_put_trampoline (htab
, output_bfd
,
14443 splt
->contents
+ htab
->tls_trampoline
,
14444 tls_trampoline
, 3);
14445 #ifdef FOUR_WORD_PLT
14446 bfd_put_32 (output_bfd
, 0x00000000,
14447 splt
->contents
+ htab
->tls_trampoline
+ 12);
14451 if (htab
->vxworks_p
&& !info
->shared
&& htab
->root
.splt
->size
> 0)
14453 /* Correct the .rel(a).plt.unloaded relocations. They will have
14454 incorrect symbol indexes. */
14458 num_plts
= ((htab
->root
.splt
->size
- htab
->plt_header_size
)
14459 / htab
->plt_entry_size
);
14460 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
14462 for (; num_plts
; num_plts
--)
14464 Elf_Internal_Rela rel
;
14466 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
14467 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
14468 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
14469 p
+= RELOC_SIZE (htab
);
14471 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
14472 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
14473 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
14474 p
+= RELOC_SIZE (htab
);
14479 if (htab
->nacl_p
&& htab
->root
.iplt
!= NULL
&& htab
->root
.iplt
->size
> 0)
14480 /* NaCl uses a special first entry in .iplt too. */
14481 arm_nacl_put_plt0 (htab
, output_bfd
, htab
->root
.iplt
, 0);
14483 /* Fill in the first three entries in the global offset table. */
14486 if (sgot
->size
> 0)
14489 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
14491 bfd_put_32 (output_bfd
,
14492 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
14494 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
14495 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
14498 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
14505 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
14507 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
14508 struct elf32_arm_link_hash_table
*globals
;
14510 i_ehdrp
= elf_elfheader (abfd
);
14512 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
14513 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
14515 _bfd_elf_post_process_headers (abfd
, link_info
);
14516 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
14520 globals
= elf32_arm_hash_table (link_info
);
14521 if (globals
!= NULL
&& globals
->byteswap_code
)
14522 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
14525 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_VER5
14526 && ((i_ehdrp
->e_type
== ET_DYN
) || (i_ehdrp
->e_type
== ET_EXEC
)))
14528 int abi
= bfd_elf_get_obj_attr_int (abfd
, OBJ_ATTR_PROC
, Tag_ABI_VFP_args
);
14530 i_ehdrp
->e_flags
|= EF_ARM_ABI_FLOAT_HARD
;
14532 i_ehdrp
->e_flags
|= EF_ARM_ABI_FLOAT_SOFT
;
14536 static enum elf_reloc_type_class
14537 elf32_arm_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
14538 const asection
*rel_sec ATTRIBUTE_UNUSED
,
14539 const Elf_Internal_Rela
*rela
)
14541 switch ((int) ELF32_R_TYPE (rela
->r_info
))
14543 case R_ARM_RELATIVE
:
14544 return reloc_class_relative
;
14545 case R_ARM_JUMP_SLOT
:
14546 return reloc_class_plt
;
14548 return reloc_class_copy
;
14550 return reloc_class_normal
;
14555 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
14557 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
14560 /* Return TRUE if this is an unwinding table entry. */
14563 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
14565 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
14566 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
14570 /* Set the type and flags for an ARM section. We do this by
14571 the section name, which is a hack, but ought to work. */
14574 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
14578 name
= bfd_get_section_name (abfd
, sec
);
14580 if (is_arm_elf_unwind_section_name (abfd
, name
))
14582 hdr
->sh_type
= SHT_ARM_EXIDX
;
14583 hdr
->sh_flags
|= SHF_LINK_ORDER
;
14588 /* Handle an ARM specific section when reading an object file. This is
14589 called when bfd_section_from_shdr finds a section with an unknown
14593 elf32_arm_section_from_shdr (bfd
*abfd
,
14594 Elf_Internal_Shdr
* hdr
,
14598 /* There ought to be a place to keep ELF backend specific flags, but
14599 at the moment there isn't one. We just keep track of the
14600 sections by their name, instead. Fortunately, the ABI gives
14601 names for all the ARM specific sections, so we will probably get
14603 switch (hdr
->sh_type
)
14605 case SHT_ARM_EXIDX
:
14606 case SHT_ARM_PREEMPTMAP
:
14607 case SHT_ARM_ATTRIBUTES
:
14614 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
14620 static _arm_elf_section_data
*
14621 get_arm_elf_section_data (asection
* sec
)
14623 if (sec
&& sec
->owner
&& is_arm_elf (sec
->owner
))
14624 return elf32_arm_section_data (sec
);
14632 struct bfd_link_info
*info
;
14635 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
14636 asection
*, struct elf_link_hash_entry
*);
14637 } output_arch_syminfo
;
14639 enum map_symbol_type
14647 /* Output a single mapping symbol. */
14650 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
14651 enum map_symbol_type type
,
14654 static const char *names
[3] = {"$a", "$t", "$d"};
14655 Elf_Internal_Sym sym
;
14657 sym
.st_value
= osi
->sec
->output_section
->vma
14658 + osi
->sec
->output_offset
14662 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
14663 sym
.st_shndx
= osi
->sec_shndx
;
14664 sym
.st_target_internal
= 0;
14665 elf32_arm_section_map_add (osi
->sec
, names
[type
][1], offset
);
14666 return osi
->func (osi
->flaginfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
14669 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
14670 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
14673 elf32_arm_output_plt_map_1 (output_arch_syminfo
*osi
,
14674 bfd_boolean is_iplt_entry_p
,
14675 union gotplt_union
*root_plt
,
14676 struct arm_plt_info
*arm_plt
)
14678 struct elf32_arm_link_hash_table
*htab
;
14679 bfd_vma addr
, plt_header_size
;
14681 if (root_plt
->offset
== (bfd_vma
) -1)
14684 htab
= elf32_arm_hash_table (osi
->info
);
14688 if (is_iplt_entry_p
)
14690 osi
->sec
= htab
->root
.iplt
;
14691 plt_header_size
= 0;
14695 osi
->sec
= htab
->root
.splt
;
14696 plt_header_size
= htab
->plt_header_size
;
14698 osi
->sec_shndx
= (_bfd_elf_section_from_bfd_section
14699 (osi
->info
->output_bfd
, osi
->sec
->output_section
));
14701 addr
= root_plt
->offset
& -2;
14702 if (htab
->symbian_p
)
14704 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14706 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
14709 else if (htab
->vxworks_p
)
14711 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14713 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
14715 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
14717 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
14720 else if (htab
->nacl_p
)
14722 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14727 bfd_boolean thumb_stub_p
;
14729 thumb_stub_p
= elf32_arm_plt_needs_thumb_stub_p (osi
->info
, arm_plt
);
14732 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
14735 #ifdef FOUR_WORD_PLT
14736 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14738 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
14741 /* A three-word PLT with no Thumb thunk contains only Arm code,
14742 so only need to output a mapping symbol for the first PLT entry and
14743 entries with thumb thunks. */
14744 if (thumb_stub_p
|| addr
== plt_header_size
)
14746 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
14755 /* Output mapping symbols for PLT entries associated with H. */
14758 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
14760 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
14761 struct elf32_arm_link_hash_entry
*eh
;
14763 if (h
->root
.type
== bfd_link_hash_indirect
)
14766 if (h
->root
.type
== bfd_link_hash_warning
)
14767 /* When warning symbols are created, they **replace** the "real"
14768 entry in the hash table, thus we never get to see the real
14769 symbol in a hash traversal. So look at it now. */
14770 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14772 eh
= (struct elf32_arm_link_hash_entry
*) h
;
14773 return elf32_arm_output_plt_map_1 (osi
, SYMBOL_CALLS_LOCAL (osi
->info
, h
),
14774 &h
->plt
, &eh
->plt
);
14777 /* Output a single local symbol for a generated stub. */
14780 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
14781 bfd_vma offset
, bfd_vma size
)
14783 Elf_Internal_Sym sym
;
14785 sym
.st_value
= osi
->sec
->output_section
->vma
14786 + osi
->sec
->output_offset
14788 sym
.st_size
= size
;
14790 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
14791 sym
.st_shndx
= osi
->sec_shndx
;
14792 sym
.st_target_internal
= 0;
14793 return osi
->func (osi
->flaginfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
14797 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
14800 struct elf32_arm_stub_hash_entry
*stub_entry
;
14801 asection
*stub_sec
;
14804 output_arch_syminfo
*osi
;
14805 const insn_sequence
*template_sequence
;
14806 enum stub_insn_type prev_type
;
14809 enum map_symbol_type sym_type
;
14811 /* Massage our args to the form they really have. */
14812 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
14813 osi
= (output_arch_syminfo
*) in_arg
;
14815 stub_sec
= stub_entry
->stub_sec
;
14817 /* Ensure this stub is attached to the current section being
14819 if (stub_sec
!= osi
->sec
)
14822 addr
= (bfd_vma
) stub_entry
->stub_offset
;
14823 stub_name
= stub_entry
->output_name
;
14825 template_sequence
= stub_entry
->stub_template
;
14826 switch (template_sequence
[0].type
)
14829 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
, stub_entry
->stub_size
))
14834 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
14835 stub_entry
->stub_size
))
14843 prev_type
= DATA_TYPE
;
14845 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
14847 switch (template_sequence
[i
].type
)
14850 sym_type
= ARM_MAP_ARM
;
14855 sym_type
= ARM_MAP_THUMB
;
14859 sym_type
= ARM_MAP_DATA
;
14867 if (template_sequence
[i
].type
!= prev_type
)
14869 prev_type
= template_sequence
[i
].type
;
14870 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
14874 switch (template_sequence
[i
].type
)
14898 /* Output mapping symbols for linker generated sections,
14899 and for those data-only sections that do not have a
14903 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
14904 struct bfd_link_info
*info
,
14906 int (*func
) (void *, const char *,
14907 Elf_Internal_Sym
*,
14909 struct elf_link_hash_entry
*))
14911 output_arch_syminfo osi
;
14912 struct elf32_arm_link_hash_table
*htab
;
14914 bfd_size_type size
;
14917 htab
= elf32_arm_hash_table (info
);
14921 check_use_blx (htab
);
14923 osi
.flaginfo
= flaginfo
;
14927 /* Add a $d mapping symbol to data-only sections that
14928 don't have any mapping symbol. This may result in (harmless) redundant
14929 mapping symbols. */
14930 for (input_bfd
= info
->input_bfds
;
14932 input_bfd
= input_bfd
->link_next
)
14934 if ((input_bfd
->flags
& (BFD_LINKER_CREATED
| HAS_SYMS
)) == HAS_SYMS
)
14935 for (osi
.sec
= input_bfd
->sections
;
14937 osi
.sec
= osi
.sec
->next
)
14939 if (osi
.sec
->output_section
!= NULL
14940 && ((osi
.sec
->output_section
->flags
& (SEC_ALLOC
| SEC_CODE
))
14942 && (osi
.sec
->flags
& (SEC_HAS_CONTENTS
| SEC_LINKER_CREATED
))
14943 == SEC_HAS_CONTENTS
14944 && get_arm_elf_section_data (osi
.sec
) != NULL
14945 && get_arm_elf_section_data (osi
.sec
)->mapcount
== 0
14946 && osi
.sec
->size
> 0
14947 && (osi
.sec
->flags
& SEC_EXCLUDE
) == 0)
14949 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14950 (output_bfd
, osi
.sec
->output_section
);
14951 if (osi
.sec_shndx
!= (int)SHN_BAD
)
14952 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 0);
14957 /* ARM->Thumb glue. */
14958 if (htab
->arm_glue_size
> 0)
14960 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
14961 ARM2THUMB_GLUE_SECTION_NAME
);
14963 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14964 (output_bfd
, osi
.sec
->output_section
);
14965 if (info
->shared
|| htab
->root
.is_relocatable_executable
14966 || htab
->pic_veneer
)
14967 size
= ARM2THUMB_PIC_GLUE_SIZE
;
14968 else if (htab
->use_blx
)
14969 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
14971 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
14973 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
14975 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
14976 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
14980 /* Thumb->ARM glue. */
14981 if (htab
->thumb_glue_size
> 0)
14983 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
14984 THUMB2ARM_GLUE_SECTION_NAME
);
14986 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
14987 (output_bfd
, osi
.sec
->output_section
);
14988 size
= THUMB2ARM_GLUE_SIZE
;
14990 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
14992 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
14993 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
14997 /* ARMv4 BX veneers. */
14998 if (htab
->bx_glue_size
> 0)
15000 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
15001 ARM_BX_GLUE_SECTION_NAME
);
15003 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
15004 (output_bfd
, osi
.sec
->output_section
);
15006 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
15009 /* Long calls stubs. */
15010 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
15012 asection
* stub_sec
;
15014 for (stub_sec
= htab
->stub_bfd
->sections
;
15016 stub_sec
= stub_sec
->next
)
15018 /* Ignore non-stub sections. */
15019 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
15022 osi
.sec
= stub_sec
;
15024 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
15025 (output_bfd
, osi
.sec
->output_section
);
15027 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
15031 /* Finally, output mapping symbols for the PLT. */
15032 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
15034 osi
.sec
= htab
->root
.splt
;
15035 osi
.sec_shndx
= (_bfd_elf_section_from_bfd_section
15036 (output_bfd
, osi
.sec
->output_section
));
15038 /* Output mapping symbols for the plt header. SymbianOS does not have a
15040 if (htab
->vxworks_p
)
15042 /* VxWorks shared libraries have no PLT header. */
15045 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
15047 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
15051 else if (htab
->nacl_p
)
15053 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
15056 else if (!htab
->symbian_p
)
15058 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
15060 #ifndef FOUR_WORD_PLT
15061 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
15066 if (htab
->nacl_p
&& htab
->root
.iplt
&& htab
->root
.iplt
->size
> 0)
15068 /* NaCl uses a special first entry in .iplt too. */
15069 osi
.sec
= htab
->root
.iplt
;
15070 osi
.sec_shndx
= (_bfd_elf_section_from_bfd_section
15071 (output_bfd
, osi
.sec
->output_section
));
15072 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
15075 if ((htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
15076 || (htab
->root
.iplt
&& htab
->root
.iplt
->size
> 0))
15078 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, &osi
);
15079 for (input_bfd
= info
->input_bfds
;
15081 input_bfd
= input_bfd
->link_next
)
15083 struct arm_local_iplt_info
**local_iplt
;
15084 unsigned int i
, num_syms
;
15086 local_iplt
= elf32_arm_local_iplt (input_bfd
);
15087 if (local_iplt
!= NULL
)
15089 num_syms
= elf_symtab_hdr (input_bfd
).sh_info
;
15090 for (i
= 0; i
< num_syms
; i
++)
15091 if (local_iplt
[i
] != NULL
15092 && !elf32_arm_output_plt_map_1 (&osi
, TRUE
,
15093 &local_iplt
[i
]->root
,
15094 &local_iplt
[i
]->arm
))
15099 if (htab
->dt_tlsdesc_plt
!= 0)
15101 /* Mapping symbols for the lazy tls trampoline. */
15102 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->dt_tlsdesc_plt
))
15105 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
15106 htab
->dt_tlsdesc_plt
+ 24))
15109 if (htab
->tls_trampoline
!= 0)
15111 /* Mapping symbols for the tls trampoline. */
15112 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->tls_trampoline
))
15114 #ifdef FOUR_WORD_PLT
15115 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
15116 htab
->tls_trampoline
+ 12))
15124 /* Allocate target specific section data. */
15127 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
15129 if (!sec
->used_by_bfd
)
15131 _arm_elf_section_data
*sdata
;
15132 bfd_size_type amt
= sizeof (*sdata
);
15134 sdata
= (_arm_elf_section_data
*) bfd_zalloc (abfd
, amt
);
15137 sec
->used_by_bfd
= sdata
;
15140 return _bfd_elf_new_section_hook (abfd
, sec
);
15144 /* Used to order a list of mapping symbols by address. */
15147 elf32_arm_compare_mapping (const void * a
, const void * b
)
15149 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
15150 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
15152 if (amap
->vma
> bmap
->vma
)
15154 else if (amap
->vma
< bmap
->vma
)
15156 else if (amap
->type
> bmap
->type
)
15157 /* Ensure results do not depend on the host qsort for objects with
15158 multiple mapping symbols at the same address by sorting on type
15161 else if (amap
->type
< bmap
->type
)
15167 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
15169 static unsigned long
15170 offset_prel31 (unsigned long addr
, bfd_vma offset
)
15172 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
15175 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
15179 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
15181 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
15182 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
15184 /* High bit of first word is supposed to be zero. */
15185 if ((first_word
& 0x80000000ul
) == 0)
15186 first_word
= offset_prel31 (first_word
, offset
);
15188 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
15189 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
15190 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
15191 second_word
= offset_prel31 (second_word
, offset
);
15193 bfd_put_32 (output_bfd
, first_word
, to
);
15194 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
15197 /* Data for make_branch_to_a8_stub(). */
15199 struct a8_branch_to_stub_data
15201 asection
*writing_section
;
15202 bfd_byte
*contents
;
15206 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
15207 places for a particular section. */
15210 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
15213 struct elf32_arm_stub_hash_entry
*stub_entry
;
15214 struct a8_branch_to_stub_data
*data
;
15215 bfd_byte
*contents
;
15216 unsigned long branch_insn
;
15217 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
15218 bfd_signed_vma branch_offset
;
15220 unsigned int target
;
15222 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
15223 data
= (struct a8_branch_to_stub_data
*) in_arg
;
15225 if (stub_entry
->target_section
!= data
->writing_section
15226 || stub_entry
->stub_type
< arm_stub_a8_veneer_lwm
)
15229 contents
= data
->contents
;
15231 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
15232 + stub_entry
->target_section
->output_offset
15233 + stub_entry
->target_value
;
15235 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
15236 + stub_entry
->stub_sec
->output_offset
15237 + stub_entry
->stub_offset
;
15239 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
15240 veneered_insn_loc
&= ~3u;
15242 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
15244 abfd
= stub_entry
->target_section
->owner
;
15245 target
= stub_entry
->target_value
;
15247 /* We attempt to avoid this condition by setting stubs_always_after_branch
15248 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
15249 This check is just to be on the safe side... */
15250 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
15252 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub is "
15253 "allocated in unsafe location"), abfd
);
15257 switch (stub_entry
->stub_type
)
15259 case arm_stub_a8_veneer_b
:
15260 case arm_stub_a8_veneer_b_cond
:
15261 branch_insn
= 0xf0009000;
15264 case arm_stub_a8_veneer_blx
:
15265 branch_insn
= 0xf000e800;
15268 case arm_stub_a8_veneer_bl
:
15270 unsigned int i1
, j1
, i2
, j2
, s
;
15272 branch_insn
= 0xf000d000;
15275 if (branch_offset
< -16777216 || branch_offset
> 16777214)
15277 /* There's not much we can do apart from complain if this
15279 (*_bfd_error_handler
) (_("%B: error: Cortex-A8 erratum stub out "
15280 "of range (input file too large)"), abfd
);
15284 /* i1 = not(j1 eor s), so:
15286 j1 = (not i1) eor s. */
15288 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
15289 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
15290 i2
= (branch_offset
>> 22) & 1;
15291 i1
= (branch_offset
>> 23) & 1;
15292 s
= (branch_offset
>> 24) & 1;
15295 branch_insn
|= j2
<< 11;
15296 branch_insn
|= j1
<< 13;
15297 branch_insn
|= s
<< 26;
15306 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[target
]);
15307 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[target
+ 2]);
15312 /* Do code byteswapping. Return FALSE afterwards so that the section is
15313 written out as normal. */
15316 elf32_arm_write_section (bfd
*output_bfd
,
15317 struct bfd_link_info
*link_info
,
15319 bfd_byte
*contents
)
15321 unsigned int mapcount
, errcount
;
15322 _arm_elf_section_data
*arm_data
;
15323 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
15324 elf32_arm_section_map
*map
;
15325 elf32_vfp11_erratum_list
*errnode
;
15328 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
15332 if (globals
== NULL
)
15335 /* If this section has not been allocated an _arm_elf_section_data
15336 structure then we cannot record anything. */
15337 arm_data
= get_arm_elf_section_data (sec
);
15338 if (arm_data
== NULL
)
15341 mapcount
= arm_data
->mapcount
;
15342 map
= arm_data
->map
;
15343 errcount
= arm_data
->erratumcount
;
15347 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
15349 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
15350 errnode
= errnode
->next
)
15352 bfd_vma target
= errnode
->vma
- offset
;
15354 switch (errnode
->type
)
15356 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
15358 bfd_vma branch_to_veneer
;
15359 /* Original condition code of instruction, plus bit mask for
15360 ARM B instruction. */
15361 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
15364 /* The instruction is before the label. */
15367 /* Above offset included in -4 below. */
15368 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
15369 - errnode
->vma
- 4;
15371 if ((signed) branch_to_veneer
< -(1 << 25)
15372 || (signed) branch_to_veneer
>= (1 << 25))
15373 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
15374 "range"), output_bfd
);
15376 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
15377 contents
[endianflip
^ target
] = insn
& 0xff;
15378 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
15379 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
15380 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
15384 case VFP11_ERRATUM_ARM_VENEER
:
15386 bfd_vma branch_from_veneer
;
15389 /* Take size of veneer into account. */
15390 branch_from_veneer
= errnode
->u
.v
.branch
->vma
15391 - errnode
->vma
- 12;
15393 if ((signed) branch_from_veneer
< -(1 << 25)
15394 || (signed) branch_from_veneer
>= (1 << 25))
15395 (*_bfd_error_handler
) (_("%B: error: VFP11 veneer out of "
15396 "range"), output_bfd
);
15398 /* Original instruction. */
15399 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
15400 contents
[endianflip
^ target
] = insn
& 0xff;
15401 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
15402 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
15403 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
15405 /* Branch back to insn after original insn. */
15406 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
15407 contents
[endianflip
^ (target
+ 4)] = insn
& 0xff;
15408 contents
[endianflip
^ (target
+ 5)] = (insn
>> 8) & 0xff;
15409 contents
[endianflip
^ (target
+ 6)] = (insn
>> 16) & 0xff;
15410 contents
[endianflip
^ (target
+ 7)] = (insn
>> 24) & 0xff;
15420 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
15422 arm_unwind_table_edit
*edit_node
15423 = arm_data
->u
.exidx
.unwind_edit_list
;
15424 /* Now, sec->size is the size of the section we will write. The original
15425 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
15426 markers) was sec->rawsize. (This isn't the case if we perform no
15427 edits, then rawsize will be zero and we should use size). */
15428 bfd_byte
*edited_contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
15429 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
15430 unsigned int in_index
, out_index
;
15431 bfd_vma add_to_offsets
= 0;
15433 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
15437 unsigned int edit_index
= edit_node
->index
;
15439 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
15441 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
15442 contents
+ in_index
* 8, add_to_offsets
);
15446 else if (in_index
== edit_index
15447 || (in_index
* 8 >= input_size
15448 && edit_index
== UINT_MAX
))
15450 switch (edit_node
->type
)
15452 case DELETE_EXIDX_ENTRY
:
15454 add_to_offsets
+= 8;
15457 case INSERT_EXIDX_CANTUNWIND_AT_END
:
15459 asection
*text_sec
= edit_node
->linked_section
;
15460 bfd_vma text_offset
= text_sec
->output_section
->vma
15461 + text_sec
->output_offset
15463 bfd_vma exidx_offset
= offset
+ out_index
* 8;
15464 unsigned long prel31_offset
;
15466 /* Note: this is meant to be equivalent to an
15467 R_ARM_PREL31 relocation. These synthetic
15468 EXIDX_CANTUNWIND markers are not relocated by the
15469 usual BFD method. */
15470 prel31_offset
= (text_offset
- exidx_offset
)
15473 /* First address we can't unwind. */
15474 bfd_put_32 (output_bfd
, prel31_offset
,
15475 &edited_contents
[out_index
* 8]);
15477 /* Code for EXIDX_CANTUNWIND. */
15478 bfd_put_32 (output_bfd
, 0x1,
15479 &edited_contents
[out_index
* 8 + 4]);
15482 add_to_offsets
-= 8;
15487 edit_node
= edit_node
->next
;
15492 /* No more edits, copy remaining entries verbatim. */
15493 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
15494 contents
+ in_index
* 8, add_to_offsets
);
15500 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
15501 bfd_set_section_contents (output_bfd
, sec
->output_section
,
15503 (file_ptr
) sec
->output_offset
, sec
->size
);
15508 /* Fix code to point to Cortex-A8 erratum stubs. */
15509 if (globals
->fix_cortex_a8
)
15511 struct a8_branch_to_stub_data data
;
15513 data
.writing_section
= sec
;
15514 data
.contents
= contents
;
15516 bfd_hash_traverse (&globals
->stub_hash_table
, make_branch_to_a8_stub
,
15523 if (globals
->byteswap_code
)
15525 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
15528 for (i
= 0; i
< mapcount
; i
++)
15530 if (i
== mapcount
- 1)
15533 end
= map
[i
+ 1].vma
;
15535 switch (map
[i
].type
)
15538 /* Byte swap code words. */
15539 while (ptr
+ 3 < end
)
15541 tmp
= contents
[ptr
];
15542 contents
[ptr
] = contents
[ptr
+ 3];
15543 contents
[ptr
+ 3] = tmp
;
15544 tmp
= contents
[ptr
+ 1];
15545 contents
[ptr
+ 1] = contents
[ptr
+ 2];
15546 contents
[ptr
+ 2] = tmp
;
15552 /* Byte swap code halfwords. */
15553 while (ptr
+ 1 < end
)
15555 tmp
= contents
[ptr
];
15556 contents
[ptr
] = contents
[ptr
+ 1];
15557 contents
[ptr
+ 1] = tmp
;
15563 /* Leave data alone. */
15571 arm_data
->mapcount
= -1;
15572 arm_data
->mapsize
= 0;
15573 arm_data
->map
= NULL
;
15578 /* Mangle thumb function symbols as we read them in. */
15581 elf32_arm_swap_symbol_in (bfd
* abfd
,
15584 Elf_Internal_Sym
*dst
)
15586 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
15589 /* New EABI objects mark thumb function symbols by setting the low bit of
15591 if (ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
15592 || ELF_ST_TYPE (dst
->st_info
) == STT_GNU_IFUNC
)
15594 if (dst
->st_value
& 1)
15596 dst
->st_value
&= ~(bfd_vma
) 1;
15597 dst
->st_target_internal
= ST_BRANCH_TO_THUMB
;
15600 dst
->st_target_internal
= ST_BRANCH_TO_ARM
;
15602 else if (ELF_ST_TYPE (dst
->st_info
) == STT_ARM_TFUNC
)
15604 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_FUNC
);
15605 dst
->st_target_internal
= ST_BRANCH_TO_THUMB
;
15607 else if (ELF_ST_TYPE (dst
->st_info
) == STT_SECTION
)
15608 dst
->st_target_internal
= ST_BRANCH_LONG
;
15610 dst
->st_target_internal
= ST_BRANCH_UNKNOWN
;
15616 /* Mangle thumb function symbols as we write them out. */
15619 elf32_arm_swap_symbol_out (bfd
*abfd
,
15620 const Elf_Internal_Sym
*src
,
15624 Elf_Internal_Sym newsym
;
15626 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
15627 of the address set, as per the new EABI. We do this unconditionally
15628 because objcopy does not set the elf header flags until after
15629 it writes out the symbol table. */
15630 if (src
->st_target_internal
== ST_BRANCH_TO_THUMB
)
15633 if (ELF_ST_TYPE (src
->st_info
) != STT_GNU_IFUNC
)
15634 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
15635 if (newsym
.st_shndx
!= SHN_UNDEF
)
15637 /* Do this only for defined symbols. At link type, the static
15638 linker will simulate the work of dynamic linker of resolving
15639 symbols and will carry over the thumbness of found symbols to
15640 the output symbol table. It's not clear how it happens, but
15641 the thumbness of undefined symbols can well be different at
15642 runtime, and writing '1' for them will be confusing for users
15643 and possibly for dynamic linker itself.
15645 newsym
.st_value
|= 1;
15650 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
15653 /* Add the PT_ARM_EXIDX program header. */
15656 elf32_arm_modify_segment_map (bfd
*abfd
,
15657 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
15659 struct elf_segment_map
*m
;
15662 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
15663 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
15665 /* If there is already a PT_ARM_EXIDX header, then we do not
15666 want to add another one. This situation arises when running
15667 "strip"; the input binary already has the header. */
15668 m
= elf_seg_map (abfd
);
15669 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
15673 m
= (struct elf_segment_map
*)
15674 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
15677 m
->p_type
= PT_ARM_EXIDX
;
15679 m
->sections
[0] = sec
;
15681 m
->next
= elf_seg_map (abfd
);
15682 elf_seg_map (abfd
) = m
;
15689 /* We may add a PT_ARM_EXIDX program header. */
15692 elf32_arm_additional_program_headers (bfd
*abfd
,
15693 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
15697 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
15698 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
15704 /* Hook called by the linker routine which adds symbols from an object
15708 elf32_arm_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
15709 Elf_Internal_Sym
*sym
, const char **namep
,
15710 flagword
*flagsp
, asection
**secp
, bfd_vma
*valp
)
15712 if ((abfd
->flags
& DYNAMIC
) == 0
15713 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
15714 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
15715 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
15717 if (elf32_arm_hash_table (info
)->vxworks_p
15718 && !elf_vxworks_add_symbol_hook (abfd
, info
, sym
, namep
,
15719 flagsp
, secp
, valp
))
15725 /* We use this to override swap_symbol_in and swap_symbol_out. */
15726 const struct elf_size_info elf32_arm_size_info
=
15728 sizeof (Elf32_External_Ehdr
),
15729 sizeof (Elf32_External_Phdr
),
15730 sizeof (Elf32_External_Shdr
),
15731 sizeof (Elf32_External_Rel
),
15732 sizeof (Elf32_External_Rela
),
15733 sizeof (Elf32_External_Sym
),
15734 sizeof (Elf32_External_Dyn
),
15735 sizeof (Elf_External_Note
),
15739 ELFCLASS32
, EV_CURRENT
,
15740 bfd_elf32_write_out_phdrs
,
15741 bfd_elf32_write_shdrs_and_ehdr
,
15742 bfd_elf32_checksum_contents
,
15743 bfd_elf32_write_relocs
,
15744 elf32_arm_swap_symbol_in
,
15745 elf32_arm_swap_symbol_out
,
15746 bfd_elf32_slurp_reloc_table
,
15747 bfd_elf32_slurp_symbol_table
,
15748 bfd_elf32_swap_dyn_in
,
15749 bfd_elf32_swap_dyn_out
,
15750 bfd_elf32_swap_reloc_in
,
15751 bfd_elf32_swap_reloc_out
,
15752 bfd_elf32_swap_reloca_in
,
15753 bfd_elf32_swap_reloca_out
15756 #define ELF_ARCH bfd_arch_arm
15757 #define ELF_TARGET_ID ARM_ELF_DATA
15758 #define ELF_MACHINE_CODE EM_ARM
15759 #ifdef __QNXTARGET__
15760 #define ELF_MAXPAGESIZE 0x1000
15762 #define ELF_MAXPAGESIZE 0x8000
15764 #define ELF_MINPAGESIZE 0x1000
15765 #define ELF_COMMONPAGESIZE 0x1000
15767 #define bfd_elf32_mkobject elf32_arm_mkobject
15769 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
15770 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
15771 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
15772 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
15773 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
15774 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
15775 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
15776 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
15777 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
15778 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
15779 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
15780 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
15781 #define bfd_elf32_bfd_final_link elf32_arm_final_link
15783 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
15784 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
15785 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
15786 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
15787 #define elf_backend_check_relocs elf32_arm_check_relocs
15788 #define elf_backend_relocate_section elf32_arm_relocate_section
15789 #define elf_backend_write_section elf32_arm_write_section
15790 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
15791 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
15792 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
15793 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
15794 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
15795 #define elf_backend_always_size_sections elf32_arm_always_size_sections
15796 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
15797 #define elf_backend_post_process_headers elf32_arm_post_process_headers
15798 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
15799 #define elf_backend_object_p elf32_arm_object_p
15800 #define elf_backend_fake_sections elf32_arm_fake_sections
15801 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
15802 #define elf_backend_final_write_processing elf32_arm_final_write_processing
15803 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
15804 #define elf_backend_size_info elf32_arm_size_info
15805 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
15806 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
15807 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
15808 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
15809 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
15811 #define elf_backend_can_refcount 1
15812 #define elf_backend_can_gc_sections 1
15813 #define elf_backend_plt_readonly 1
15814 #define elf_backend_want_got_plt 1
15815 #define elf_backend_want_plt_sym 0
15816 #define elf_backend_may_use_rel_p 1
15817 #define elf_backend_may_use_rela_p 0
15818 #define elf_backend_default_use_rela_p 0
15820 #define elf_backend_got_header_size 12
15822 #undef elf_backend_obj_attrs_vendor
15823 #define elf_backend_obj_attrs_vendor "aeabi"
15824 #undef elf_backend_obj_attrs_section
15825 #define elf_backend_obj_attrs_section ".ARM.attributes"
15826 #undef elf_backend_obj_attrs_arg_type
15827 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
15828 #undef elf_backend_obj_attrs_section_type
15829 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
15830 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
15831 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
15833 #include "elf32-target.h"
15835 /* Native Client targets. */
15837 #undef TARGET_LITTLE_SYM
15838 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_nacl_vec
15839 #undef TARGET_LITTLE_NAME
15840 #define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
15841 #undef TARGET_BIG_SYM
15842 #define TARGET_BIG_SYM bfd_elf32_bigarm_nacl_vec
15843 #undef TARGET_BIG_NAME
15844 #define TARGET_BIG_NAME "elf32-bigarm-nacl"
15846 /* Like elf32_arm_link_hash_table_create -- but overrides
15847 appropriately for NaCl. */
15849 static struct bfd_link_hash_table
*
15850 elf32_arm_nacl_link_hash_table_create (bfd
*abfd
)
15852 struct bfd_link_hash_table
*ret
;
15854 ret
= elf32_arm_link_hash_table_create (abfd
);
15857 struct elf32_arm_link_hash_table
*htab
15858 = (struct elf32_arm_link_hash_table
*) ret
;
15862 htab
->plt_header_size
= 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry
);
15863 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry
);
15868 /* Since NaCl doesn't use the ARM-specific unwind format, we don't
15869 really need to use elf32_arm_modify_segment_map. But we do it
15870 anyway just to reduce gratuitous differences with the stock ARM backend. */
15873 elf32_arm_nacl_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
15875 return (elf32_arm_modify_segment_map (abfd
, info
)
15876 && nacl_modify_segment_map (abfd
, info
));
15880 elf32_arm_nacl_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
15882 elf32_arm_final_write_processing (abfd
, linker
);
15883 nacl_final_write_processing (abfd
, linker
);
15888 #define elf32_bed elf32_arm_nacl_bed
15889 #undef bfd_elf32_bfd_link_hash_table_create
15890 #define bfd_elf32_bfd_link_hash_table_create \
15891 elf32_arm_nacl_link_hash_table_create
15892 #undef elf_backend_plt_alignment
15893 #define elf_backend_plt_alignment 4
15894 #undef elf_backend_modify_segment_map
15895 #define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
15896 #undef elf_backend_modify_program_headers
15897 #define elf_backend_modify_program_headers nacl_modify_program_headers
15898 #undef elf_backend_final_write_processing
15899 #define elf_backend_final_write_processing elf32_arm_nacl_final_write_processing
15901 #undef ELF_MAXPAGESIZE
15902 #define ELF_MAXPAGESIZE 0x10000
15903 #undef ELF_MINPAGESIZE
15904 #undef ELF_COMMONPAGESIZE
15907 #include "elf32-target.h"
15909 /* Reset to defaults. */
15910 #undef elf_backend_plt_alignment
15911 #undef elf_backend_modify_segment_map
15912 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
15913 #undef elf_backend_modify_program_headers
15914 #undef elf_backend_final_write_processing
15915 #define elf_backend_final_write_processing elf32_arm_final_write_processing
15916 #undef ELF_MINPAGESIZE
15917 #define ELF_MINPAGESIZE 0x1000
15918 #undef ELF_COMMONPAGESIZE
15919 #define ELF_COMMONPAGESIZE 0x1000
15922 /* VxWorks Targets. */
15924 #undef TARGET_LITTLE_SYM
15925 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
15926 #undef TARGET_LITTLE_NAME
15927 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
15928 #undef TARGET_BIG_SYM
15929 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
15930 #undef TARGET_BIG_NAME
15931 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
15933 /* Like elf32_arm_link_hash_table_create -- but overrides
15934 appropriately for VxWorks. */
15936 static struct bfd_link_hash_table
*
15937 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
15939 struct bfd_link_hash_table
*ret
;
15941 ret
= elf32_arm_link_hash_table_create (abfd
);
15944 struct elf32_arm_link_hash_table
*htab
15945 = (struct elf32_arm_link_hash_table
*) ret
;
15947 htab
->vxworks_p
= 1;
15953 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
15955 elf32_arm_final_write_processing (abfd
, linker
);
15956 elf_vxworks_final_write_processing (abfd
, linker
);
15960 #define elf32_bed elf32_arm_vxworks_bed
15962 #undef bfd_elf32_bfd_link_hash_table_create
15963 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
15964 #undef elf_backend_final_write_processing
15965 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
15966 #undef elf_backend_emit_relocs
15967 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
15969 #undef elf_backend_may_use_rel_p
15970 #define elf_backend_may_use_rel_p 0
15971 #undef elf_backend_may_use_rela_p
15972 #define elf_backend_may_use_rela_p 1
15973 #undef elf_backend_default_use_rela_p
15974 #define elf_backend_default_use_rela_p 1
15975 #undef elf_backend_want_plt_sym
15976 #define elf_backend_want_plt_sym 1
15977 #undef ELF_MAXPAGESIZE
15978 #define ELF_MAXPAGESIZE 0x1000
15980 #include "elf32-target.h"
15983 /* Merge backend specific data from an object file to the output
15984 object file when linking. */
15987 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
15989 flagword out_flags
;
15991 bfd_boolean flags_compatible
= TRUE
;
15994 /* Check if we have the same endianness. */
15995 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
15998 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
16001 if (!elf32_arm_merge_eabi_attributes (ibfd
, obfd
))
16004 /* The input BFD must have had its flags initialised. */
16005 /* The following seems bogus to me -- The flags are initialized in
16006 the assembler but I don't think an elf_flags_init field is
16007 written into the object. */
16008 /* BFD_ASSERT (elf_flags_init (ibfd)); */
16010 in_flags
= elf_elfheader (ibfd
)->e_flags
;
16011 out_flags
= elf_elfheader (obfd
)->e_flags
;
16013 /* In theory there is no reason why we couldn't handle this. However
16014 in practice it isn't even close to working and there is no real
16015 reason to want it. */
16016 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
16017 && !(ibfd
->flags
& DYNAMIC
)
16018 && (in_flags
& EF_ARM_BE8
))
16020 _bfd_error_handler (_("error: %B is already in final BE8 format"),
16025 if (!elf_flags_init (obfd
))
16027 /* If the input is the default architecture and had the default
16028 flags then do not bother setting the flags for the output
16029 architecture, instead allow future merges to do this. If no
16030 future merges ever set these flags then they will retain their
16031 uninitialised values, which surprise surprise, correspond
16032 to the default values. */
16033 if (bfd_get_arch_info (ibfd
)->the_default
16034 && elf_elfheader (ibfd
)->e_flags
== 0)
16037 elf_flags_init (obfd
) = TRUE
;
16038 elf_elfheader (obfd
)->e_flags
= in_flags
;
16040 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
16041 && bfd_get_arch_info (obfd
)->the_default
)
16042 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
16047 /* Determine what should happen if the input ARM architecture
16048 does not match the output ARM architecture. */
16049 if (! bfd_arm_merge_machines (ibfd
, obfd
))
16052 /* Identical flags must be compatible. */
16053 if (in_flags
== out_flags
)
16056 /* Check to see if the input BFD actually contains any sections. If
16057 not, its flags may not have been initialised either, but it
16058 cannot actually cause any incompatiblity. Do not short-circuit
16059 dynamic objects; their section list may be emptied by
16060 elf_link_add_object_symbols.
16062 Also check to see if there are no code sections in the input.
16063 In this case there is no need to check for code specific flags.
16064 XXX - do we need to worry about floating-point format compatability
16065 in data sections ? */
16066 if (!(ibfd
->flags
& DYNAMIC
))
16068 bfd_boolean null_input_bfd
= TRUE
;
16069 bfd_boolean only_data_sections
= TRUE
;
16071 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
16073 /* Ignore synthetic glue sections. */
16074 if (strcmp (sec
->name
, ".glue_7")
16075 && strcmp (sec
->name
, ".glue_7t"))
16077 if ((bfd_get_section_flags (ibfd
, sec
)
16078 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
16079 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
16080 only_data_sections
= FALSE
;
16082 null_input_bfd
= FALSE
;
16087 if (null_input_bfd
|| only_data_sections
)
16091 /* Complain about various flag mismatches. */
16092 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
16093 EF_ARM_EABI_VERSION (out_flags
)))
16096 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
16098 (in_flags
& EF_ARM_EABIMASK
) >> 24,
16099 (out_flags
& EF_ARM_EABIMASK
) >> 24);
16103 /* Not sure what needs to be checked for EABI versions >= 1. */
16104 /* VxWorks libraries do not use these flags. */
16105 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
16106 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
16107 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
16109 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
16112 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
16114 in_flags
& EF_ARM_APCS_26
? 26 : 32,
16115 out_flags
& EF_ARM_APCS_26
? 26 : 32);
16116 flags_compatible
= FALSE
;
16119 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
16121 if (in_flags
& EF_ARM_APCS_FLOAT
)
16123 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
16127 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
16130 flags_compatible
= FALSE
;
16133 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
16135 if (in_flags
& EF_ARM_VFP_FLOAT
)
16137 (_("error: %B uses VFP instructions, whereas %B does not"),
16141 (_("error: %B uses FPA instructions, whereas %B does not"),
16144 flags_compatible
= FALSE
;
16147 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
16149 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
16151 (_("error: %B uses Maverick instructions, whereas %B does not"),
16155 (_("error: %B does not use Maverick instructions, whereas %B does"),
16158 flags_compatible
= FALSE
;
16161 #ifdef EF_ARM_SOFT_FLOAT
16162 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
16164 /* We can allow interworking between code that is VFP format
16165 layout, and uses either soft float or integer regs for
16166 passing floating point arguments and results. We already
16167 know that the APCS_FLOAT flags match; similarly for VFP
16169 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
16170 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
16172 if (in_flags
& EF_ARM_SOFT_FLOAT
)
16174 (_("error: %B uses software FP, whereas %B uses hardware FP"),
16178 (_("error: %B uses hardware FP, whereas %B uses software FP"),
16181 flags_compatible
= FALSE
;
16186 /* Interworking mismatch is only a warning. */
16187 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
16189 if (in_flags
& EF_ARM_INTERWORK
)
16192 (_("Warning: %B supports interworking, whereas %B does not"),
16198 (_("Warning: %B does not support interworking, whereas %B does"),
16204 return flags_compatible
;
16208 /* Symbian OS Targets. */
16210 #undef TARGET_LITTLE_SYM
16211 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
16212 #undef TARGET_LITTLE_NAME
16213 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
16214 #undef TARGET_BIG_SYM
16215 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
16216 #undef TARGET_BIG_NAME
16217 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
16219 /* Like elf32_arm_link_hash_table_create -- but overrides
16220 appropriately for Symbian OS. */
16222 static struct bfd_link_hash_table
*
16223 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
16225 struct bfd_link_hash_table
*ret
;
16227 ret
= elf32_arm_link_hash_table_create (abfd
);
16230 struct elf32_arm_link_hash_table
*htab
16231 = (struct elf32_arm_link_hash_table
*)ret
;
16232 /* There is no PLT header for Symbian OS. */
16233 htab
->plt_header_size
= 0;
16234 /* The PLT entries are each one instruction and one word. */
16235 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
16236 htab
->symbian_p
= 1;
16237 /* Symbian uses armv5t or above, so use_blx is always true. */
16239 htab
->root
.is_relocatable_executable
= 1;
16244 static const struct bfd_elf_special_section
16245 elf32_arm_symbian_special_sections
[] =
16247 /* In a BPABI executable, the dynamic linking sections do not go in
16248 the loadable read-only segment. The post-linker may wish to
16249 refer to these sections, but they are not part of the final
16251 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
16252 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
16253 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
16254 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
16255 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
16256 /* These sections do not need to be writable as the SymbianOS
16257 postlinker will arrange things so that no dynamic relocation is
16259 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
16260 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
16261 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
16262 { NULL
, 0, 0, 0, 0 }
16266 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
16267 struct bfd_link_info
*link_info
)
16269 /* BPABI objects are never loaded directly by an OS kernel; they are
16270 processed by a postlinker first, into an OS-specific format. If
16271 the D_PAGED bit is set on the file, BFD will align segments on
16272 page boundaries, so that an OS can directly map the file. With
16273 BPABI objects, that just results in wasted space. In addition,
16274 because we clear the D_PAGED bit, map_sections_to_segments will
16275 recognize that the program headers should not be mapped into any
16276 loadable segment. */
16277 abfd
->flags
&= ~D_PAGED
;
16278 elf32_arm_begin_write_processing (abfd
, link_info
);
16282 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
16283 struct bfd_link_info
*info
)
16285 struct elf_segment_map
*m
;
16288 /* BPABI shared libraries and executables should have a PT_DYNAMIC
16289 segment. However, because the .dynamic section is not marked
16290 with SEC_LOAD, the generic ELF code will not create such a
16292 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
16295 for (m
= elf_seg_map (abfd
); m
!= NULL
; m
= m
->next
)
16296 if (m
->p_type
== PT_DYNAMIC
)
16301 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
16302 m
->next
= elf_seg_map (abfd
);
16303 elf_seg_map (abfd
) = m
;
16307 /* Also call the generic arm routine. */
16308 return elf32_arm_modify_segment_map (abfd
, info
);
16311 /* Return address for Ith PLT stub in section PLT, for relocation REL
16312 or (bfd_vma) -1 if it should not be included. */
16315 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
16316 const arelent
*rel ATTRIBUTE_UNUSED
)
16318 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
16323 #define elf32_bed elf32_arm_symbian_bed
16325 /* The dynamic sections are not allocated on SymbianOS; the postlinker
16326 will process them and then discard them. */
16327 #undef ELF_DYNAMIC_SEC_FLAGS
16328 #define ELF_DYNAMIC_SEC_FLAGS \
16329 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
16331 #undef elf_backend_emit_relocs
16333 #undef bfd_elf32_bfd_link_hash_table_create
16334 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
16335 #undef elf_backend_special_sections
16336 #define elf_backend_special_sections elf32_arm_symbian_special_sections
16337 #undef elf_backend_begin_write_processing
16338 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
16339 #undef elf_backend_final_write_processing
16340 #define elf_backend_final_write_processing elf32_arm_final_write_processing
16342 #undef elf_backend_modify_segment_map
16343 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
16345 /* There is no .got section for BPABI objects, and hence no header. */
16346 #undef elf_backend_got_header_size
16347 #define elf_backend_got_header_size 0
16349 /* Similarly, there is no .got.plt section. */
16350 #undef elf_backend_want_got_plt
16351 #define elf_backend_want_got_plt 0
16353 #undef elf_backend_plt_sym_val
16354 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
16356 #undef elf_backend_may_use_rel_p
16357 #define elf_backend_may_use_rel_p 1
16358 #undef elf_backend_may_use_rela_p
16359 #define elf_backend_may_use_rela_p 0
16360 #undef elf_backend_default_use_rela_p
16361 #define elf_backend_default_use_rela_p 0
16362 #undef elf_backend_want_plt_sym
16363 #define elf_backend_want_plt_sym 0
16364 #undef ELF_MAXPAGESIZE
16365 #define ELF_MAXPAGESIZE 0x8000
16367 #include "elf32-target.h"