1 /* 32-bit ELF support for ARM
2 Copyright (C) 1998-2017 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 3, /* 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 NULL
, /* 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 */
1694 HOWTO (R_ARM_THM_ALU_ABS_G0_NC
,/* type. */
1695 0, /* rightshift. */
1696 1, /* size (0 = byte, 1 = short, 2 = long). */
1698 FALSE
, /* pc_relative. */
1700 complain_overflow_bitfield
,/* complain_on_overflow. */
1701 bfd_elf_generic_reloc
, /* special_function. */
1702 "R_ARM_THM_ALU_ABS_G0_NC",/* name. */
1703 FALSE
, /* partial_inplace. */
1704 0x00000000, /* src_mask. */
1705 0x00000000, /* dst_mask. */
1706 FALSE
), /* pcrel_offset. */
1707 HOWTO (R_ARM_THM_ALU_ABS_G1_NC
,/* type. */
1708 0, /* rightshift. */
1709 1, /* size (0 = byte, 1 = short, 2 = long). */
1711 FALSE
, /* pc_relative. */
1713 complain_overflow_bitfield
,/* complain_on_overflow. */
1714 bfd_elf_generic_reloc
, /* special_function. */
1715 "R_ARM_THM_ALU_ABS_G1_NC",/* name. */
1716 FALSE
, /* partial_inplace. */
1717 0x00000000, /* src_mask. */
1718 0x00000000, /* dst_mask. */
1719 FALSE
), /* pcrel_offset. */
1720 HOWTO (R_ARM_THM_ALU_ABS_G2_NC
,/* type. */
1721 0, /* rightshift. */
1722 1, /* size (0 = byte, 1 = short, 2 = long). */
1724 FALSE
, /* pc_relative. */
1726 complain_overflow_bitfield
,/* complain_on_overflow. */
1727 bfd_elf_generic_reloc
, /* special_function. */
1728 "R_ARM_THM_ALU_ABS_G2_NC",/* name. */
1729 FALSE
, /* partial_inplace. */
1730 0x00000000, /* src_mask. */
1731 0x00000000, /* dst_mask. */
1732 FALSE
), /* pcrel_offset. */
1733 HOWTO (R_ARM_THM_ALU_ABS_G3_NC
,/* type. */
1734 0, /* rightshift. */
1735 1, /* size (0 = byte, 1 = short, 2 = long). */
1737 FALSE
, /* pc_relative. */
1739 complain_overflow_bitfield
,/* complain_on_overflow. */
1740 bfd_elf_generic_reloc
, /* special_function. */
1741 "R_ARM_THM_ALU_ABS_G3_NC",/* name. */
1742 FALSE
, /* partial_inplace. */
1743 0x00000000, /* src_mask. */
1744 0x00000000, /* dst_mask. */
1745 FALSE
), /* pcrel_offset. */
1749 static reloc_howto_type elf32_arm_howto_table_2
[1] =
1751 HOWTO (R_ARM_IRELATIVE
, /* type */
1753 2, /* size (0 = byte, 1 = short, 2 = long) */
1755 FALSE
, /* pc_relative */
1757 complain_overflow_bitfield
,/* complain_on_overflow */
1758 bfd_elf_generic_reloc
, /* special_function */
1759 "R_ARM_IRELATIVE", /* name */
1760 TRUE
, /* partial_inplace */
1761 0xffffffff, /* src_mask */
1762 0xffffffff, /* dst_mask */
1763 FALSE
) /* pcrel_offset */
1766 /* 249-255 extended, currently unused, relocations: */
1767 static reloc_howto_type elf32_arm_howto_table_3
[4] =
1769 HOWTO (R_ARM_RREL32
, /* type */
1771 0, /* size (0 = byte, 1 = short, 2 = long) */
1773 FALSE
, /* pc_relative */
1775 complain_overflow_dont
,/* complain_on_overflow */
1776 bfd_elf_generic_reloc
, /* special_function */
1777 "R_ARM_RREL32", /* name */
1778 FALSE
, /* partial_inplace */
1781 FALSE
), /* pcrel_offset */
1783 HOWTO (R_ARM_RABS32
, /* type */
1785 0, /* size (0 = byte, 1 = short, 2 = long) */
1787 FALSE
, /* pc_relative */
1789 complain_overflow_dont
,/* complain_on_overflow */
1790 bfd_elf_generic_reloc
, /* special_function */
1791 "R_ARM_RABS32", /* name */
1792 FALSE
, /* partial_inplace */
1795 FALSE
), /* pcrel_offset */
1797 HOWTO (R_ARM_RPC24
, /* type */
1799 0, /* size (0 = byte, 1 = short, 2 = long) */
1801 FALSE
, /* pc_relative */
1803 complain_overflow_dont
,/* complain_on_overflow */
1804 bfd_elf_generic_reloc
, /* special_function */
1805 "R_ARM_RPC24", /* name */
1806 FALSE
, /* partial_inplace */
1809 FALSE
), /* pcrel_offset */
1811 HOWTO (R_ARM_RBASE
, /* type */
1813 0, /* size (0 = byte, 1 = short, 2 = long) */
1815 FALSE
, /* pc_relative */
1817 complain_overflow_dont
,/* complain_on_overflow */
1818 bfd_elf_generic_reloc
, /* special_function */
1819 "R_ARM_RBASE", /* name */
1820 FALSE
, /* partial_inplace */
1823 FALSE
) /* pcrel_offset */
1826 static reloc_howto_type
*
1827 elf32_arm_howto_from_type (unsigned int r_type
)
1829 if (r_type
< ARRAY_SIZE (elf32_arm_howto_table_1
))
1830 return &elf32_arm_howto_table_1
[r_type
];
1832 if (r_type
== R_ARM_IRELATIVE
)
1833 return &elf32_arm_howto_table_2
[r_type
- R_ARM_IRELATIVE
];
1835 if (r_type
>= R_ARM_RREL32
1836 && r_type
< R_ARM_RREL32
+ ARRAY_SIZE (elf32_arm_howto_table_3
))
1837 return &elf32_arm_howto_table_3
[r_type
- R_ARM_RREL32
];
1843 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
1844 Elf_Internal_Rela
* elf_reloc
)
1846 unsigned int r_type
;
1848 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
1849 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
1852 struct elf32_arm_reloc_map
1854 bfd_reloc_code_real_type bfd_reloc_val
;
1855 unsigned char elf_reloc_val
;
1858 /* All entries in this list must also be present in elf32_arm_howto_table. */
1859 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
1861 {BFD_RELOC_NONE
, R_ARM_NONE
},
1862 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
1863 {BFD_RELOC_ARM_PCREL_CALL
, R_ARM_CALL
},
1864 {BFD_RELOC_ARM_PCREL_JUMP
, R_ARM_JUMP24
},
1865 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
1866 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
1867 {BFD_RELOC_32
, R_ARM_ABS32
},
1868 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
1869 {BFD_RELOC_8
, R_ARM_ABS8
},
1870 {BFD_RELOC_16
, R_ARM_ABS16
},
1871 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
1872 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
1873 {BFD_RELOC_THUMB_PCREL_BRANCH25
, R_ARM_THM_JUMP24
},
1874 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_CALL
},
1875 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_JUMP11
},
1876 {BFD_RELOC_THUMB_PCREL_BRANCH20
, R_ARM_THM_JUMP19
},
1877 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_JUMP8
},
1878 {BFD_RELOC_THUMB_PCREL_BRANCH7
, R_ARM_THM_JUMP6
},
1879 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
1880 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
1881 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
1882 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF32
},
1883 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
1884 {BFD_RELOC_ARM_GOT_PREL
, R_ARM_GOT_PREL
},
1885 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
1886 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1887 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
1888 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
1889 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
1890 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
1891 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
},
1892 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
1893 {BFD_RELOC_ARM_TLS_GOTDESC
, R_ARM_TLS_GOTDESC
},
1894 {BFD_RELOC_ARM_TLS_CALL
, R_ARM_TLS_CALL
},
1895 {BFD_RELOC_ARM_THM_TLS_CALL
, R_ARM_THM_TLS_CALL
},
1896 {BFD_RELOC_ARM_TLS_DESCSEQ
, R_ARM_TLS_DESCSEQ
},
1897 {BFD_RELOC_ARM_THM_TLS_DESCSEQ
, R_ARM_THM_TLS_DESCSEQ
},
1898 {BFD_RELOC_ARM_TLS_DESC
, R_ARM_TLS_DESC
},
1899 {BFD_RELOC_ARM_TLS_GD32
, R_ARM_TLS_GD32
},
1900 {BFD_RELOC_ARM_TLS_LDO32
, R_ARM_TLS_LDO32
},
1901 {BFD_RELOC_ARM_TLS_LDM32
, R_ARM_TLS_LDM32
},
1902 {BFD_RELOC_ARM_TLS_DTPMOD32
, R_ARM_TLS_DTPMOD32
},
1903 {BFD_RELOC_ARM_TLS_DTPOFF32
, R_ARM_TLS_DTPOFF32
},
1904 {BFD_RELOC_ARM_TLS_TPOFF32
, R_ARM_TLS_TPOFF32
},
1905 {BFD_RELOC_ARM_TLS_IE32
, R_ARM_TLS_IE32
},
1906 {BFD_RELOC_ARM_TLS_LE32
, R_ARM_TLS_LE32
},
1907 {BFD_RELOC_ARM_IRELATIVE
, R_ARM_IRELATIVE
},
1908 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
1909 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
},
1910 {BFD_RELOC_ARM_MOVW
, R_ARM_MOVW_ABS_NC
},
1911 {BFD_RELOC_ARM_MOVT
, R_ARM_MOVT_ABS
},
1912 {BFD_RELOC_ARM_MOVW_PCREL
, R_ARM_MOVW_PREL_NC
},
1913 {BFD_RELOC_ARM_MOVT_PCREL
, R_ARM_MOVT_PREL
},
1914 {BFD_RELOC_ARM_THUMB_MOVW
, R_ARM_THM_MOVW_ABS_NC
},
1915 {BFD_RELOC_ARM_THUMB_MOVT
, R_ARM_THM_MOVT_ABS
},
1916 {BFD_RELOC_ARM_THUMB_MOVW_PCREL
, R_ARM_THM_MOVW_PREL_NC
},
1917 {BFD_RELOC_ARM_THUMB_MOVT_PCREL
, R_ARM_THM_MOVT_PREL
},
1918 {BFD_RELOC_ARM_ALU_PC_G0_NC
, R_ARM_ALU_PC_G0_NC
},
1919 {BFD_RELOC_ARM_ALU_PC_G0
, R_ARM_ALU_PC_G0
},
1920 {BFD_RELOC_ARM_ALU_PC_G1_NC
, R_ARM_ALU_PC_G1_NC
},
1921 {BFD_RELOC_ARM_ALU_PC_G1
, R_ARM_ALU_PC_G1
},
1922 {BFD_RELOC_ARM_ALU_PC_G2
, R_ARM_ALU_PC_G2
},
1923 {BFD_RELOC_ARM_LDR_PC_G0
, R_ARM_LDR_PC_G0
},
1924 {BFD_RELOC_ARM_LDR_PC_G1
, R_ARM_LDR_PC_G1
},
1925 {BFD_RELOC_ARM_LDR_PC_G2
, R_ARM_LDR_PC_G2
},
1926 {BFD_RELOC_ARM_LDRS_PC_G0
, R_ARM_LDRS_PC_G0
},
1927 {BFD_RELOC_ARM_LDRS_PC_G1
, R_ARM_LDRS_PC_G1
},
1928 {BFD_RELOC_ARM_LDRS_PC_G2
, R_ARM_LDRS_PC_G2
},
1929 {BFD_RELOC_ARM_LDC_PC_G0
, R_ARM_LDC_PC_G0
},
1930 {BFD_RELOC_ARM_LDC_PC_G1
, R_ARM_LDC_PC_G1
},
1931 {BFD_RELOC_ARM_LDC_PC_G2
, R_ARM_LDC_PC_G2
},
1932 {BFD_RELOC_ARM_ALU_SB_G0_NC
, R_ARM_ALU_SB_G0_NC
},
1933 {BFD_RELOC_ARM_ALU_SB_G0
, R_ARM_ALU_SB_G0
},
1934 {BFD_RELOC_ARM_ALU_SB_G1_NC
, R_ARM_ALU_SB_G1_NC
},
1935 {BFD_RELOC_ARM_ALU_SB_G1
, R_ARM_ALU_SB_G1
},
1936 {BFD_RELOC_ARM_ALU_SB_G2
, R_ARM_ALU_SB_G2
},
1937 {BFD_RELOC_ARM_LDR_SB_G0
, R_ARM_LDR_SB_G0
},
1938 {BFD_RELOC_ARM_LDR_SB_G1
, R_ARM_LDR_SB_G1
},
1939 {BFD_RELOC_ARM_LDR_SB_G2
, R_ARM_LDR_SB_G2
},
1940 {BFD_RELOC_ARM_LDRS_SB_G0
, R_ARM_LDRS_SB_G0
},
1941 {BFD_RELOC_ARM_LDRS_SB_G1
, R_ARM_LDRS_SB_G1
},
1942 {BFD_RELOC_ARM_LDRS_SB_G2
, R_ARM_LDRS_SB_G2
},
1943 {BFD_RELOC_ARM_LDC_SB_G0
, R_ARM_LDC_SB_G0
},
1944 {BFD_RELOC_ARM_LDC_SB_G1
, R_ARM_LDC_SB_G1
},
1945 {BFD_RELOC_ARM_LDC_SB_G2
, R_ARM_LDC_SB_G2
},
1946 {BFD_RELOC_ARM_V4BX
, R_ARM_V4BX
},
1947 {BFD_RELOC_ARM_THUMB_ALU_ABS_G3_NC
, R_ARM_THM_ALU_ABS_G3_NC
},
1948 {BFD_RELOC_ARM_THUMB_ALU_ABS_G2_NC
, R_ARM_THM_ALU_ABS_G2_NC
},
1949 {BFD_RELOC_ARM_THUMB_ALU_ABS_G1_NC
, R_ARM_THM_ALU_ABS_G1_NC
},
1950 {BFD_RELOC_ARM_THUMB_ALU_ABS_G0_NC
, R_ARM_THM_ALU_ABS_G0_NC
}
1953 static reloc_howto_type
*
1954 elf32_arm_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1955 bfd_reloc_code_real_type code
)
1959 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_reloc_map
); i
++)
1960 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
1961 return elf32_arm_howto_from_type (elf32_arm_reloc_map
[i
].elf_reloc_val
);
1966 static reloc_howto_type
*
1967 elf32_arm_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1972 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_1
); i
++)
1973 if (elf32_arm_howto_table_1
[i
].name
!= NULL
1974 && strcasecmp (elf32_arm_howto_table_1
[i
].name
, r_name
) == 0)
1975 return &elf32_arm_howto_table_1
[i
];
1977 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_2
); i
++)
1978 if (elf32_arm_howto_table_2
[i
].name
!= NULL
1979 && strcasecmp (elf32_arm_howto_table_2
[i
].name
, r_name
) == 0)
1980 return &elf32_arm_howto_table_2
[i
];
1982 for (i
= 0; i
< ARRAY_SIZE (elf32_arm_howto_table_3
); i
++)
1983 if (elf32_arm_howto_table_3
[i
].name
!= NULL
1984 && strcasecmp (elf32_arm_howto_table_3
[i
].name
, r_name
) == 0)
1985 return &elf32_arm_howto_table_3
[i
];
1990 /* Support for core dump NOTE sections. */
1993 elf32_arm_nabi_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1998 switch (note
->descsz
)
2003 case 148: /* Linux/ARM 32-bit. */
2005 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
2008 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
2017 /* Make a ".reg/999" section. */
2018 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
2019 size
, note
->descpos
+ offset
);
2023 elf32_arm_nabi_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
2025 switch (note
->descsz
)
2030 case 124: /* Linux/ARM elf_prpsinfo. */
2031 elf_tdata (abfd
)->core
->pid
2032 = bfd_get_32 (abfd
, note
->descdata
+ 12);
2033 elf_tdata (abfd
)->core
->program
2034 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
2035 elf_tdata (abfd
)->core
->command
2036 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
2039 /* Note that for some reason, a spurious space is tacked
2040 onto the end of the args in some (at least one anyway)
2041 implementations, so strip it off if it exists. */
2043 char *command
= elf_tdata (abfd
)->core
->command
;
2044 int n
= strlen (command
);
2046 if (0 < n
&& command
[n
- 1] == ' ')
2047 command
[n
- 1] = '\0';
2054 elf32_arm_nabi_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
2067 va_start (ap
, note_type
);
2068 memset (data
, 0, sizeof (data
));
2069 strncpy (data
+ 28, va_arg (ap
, const char *), 16);
2070 strncpy (data
+ 44, va_arg (ap
, const char *), 80);
2073 return elfcore_write_note (abfd
, buf
, bufsiz
,
2074 "CORE", note_type
, data
, sizeof (data
));
2085 va_start (ap
, note_type
);
2086 memset (data
, 0, sizeof (data
));
2087 pid
= va_arg (ap
, long);
2088 bfd_put_32 (abfd
, pid
, data
+ 24);
2089 cursig
= va_arg (ap
, int);
2090 bfd_put_16 (abfd
, cursig
, data
+ 12);
2091 greg
= va_arg (ap
, const void *);
2092 memcpy (data
+ 72, greg
, 72);
2095 return elfcore_write_note (abfd
, buf
, bufsiz
,
2096 "CORE", note_type
, data
, sizeof (data
));
2101 #define TARGET_LITTLE_SYM arm_elf32_le_vec
2102 #define TARGET_LITTLE_NAME "elf32-littlearm"
2103 #define TARGET_BIG_SYM arm_elf32_be_vec
2104 #define TARGET_BIG_NAME "elf32-bigarm"
2106 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
2107 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
2108 #define elf_backend_write_core_note elf32_arm_nabi_write_core_note
2110 typedef unsigned long int insn32
;
2111 typedef unsigned short int insn16
;
2113 /* In lieu of proper flags, assume all EABIv4 or later objects are
2115 #define INTERWORK_FLAG(abfd) \
2116 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
2117 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2118 || ((abfd)->flags & BFD_LINKER_CREATED))
2120 /* The linker script knows the section names for placement.
2121 The entry_names are used to do simple name mangling on the stubs.
2122 Given a function name, and its type, the stub can be found. The
2123 name can be changed. The only requirement is the %s be present. */
2124 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2125 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2127 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2128 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2130 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2131 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2133 #define STM32L4XX_ERRATUM_VENEER_SECTION_NAME ".text.stm32l4xx_veneer"
2134 #define STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "__stm32l4xx_veneer_%x"
2136 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2137 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2139 #define STUB_ENTRY_NAME "__%s_veneer"
2141 #define CMSE_PREFIX "__acle_se_"
2143 /* The name of the dynamic interpreter. This is put in the .interp
2145 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2147 static const unsigned long tls_trampoline
[] =
2149 0xe08e0000, /* add r0, lr, r0 */
2150 0xe5901004, /* ldr r1, [r0,#4] */
2151 0xe12fff11, /* bx r1 */
2154 static const unsigned long dl_tlsdesc_lazy_trampoline
[] =
2156 0xe52d2004, /* push {r2} */
2157 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2158 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2159 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2160 0xe081100f, /* 2: add r1, pc */
2161 0xe12fff12, /* bx r2 */
2162 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2163 + dl_tlsdesc_lazy_resolver(GOT) */
2164 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2167 #ifdef FOUR_WORD_PLT
2169 /* The first entry in a procedure linkage table looks like
2170 this. It is set up so that any shared library function that is
2171 called before the relocation has been set up calls the dynamic
2173 static const bfd_vma elf32_arm_plt0_entry
[] =
2175 0xe52de004, /* str lr, [sp, #-4]! */
2176 0xe59fe010, /* ldr lr, [pc, #16] */
2177 0xe08fe00e, /* add lr, pc, lr */
2178 0xe5bef008, /* ldr pc, [lr, #8]! */
2181 /* Subsequent entries in a procedure linkage table look like
2183 static const bfd_vma elf32_arm_plt_entry
[] =
2185 0xe28fc600, /* add ip, pc, #NN */
2186 0xe28cca00, /* add ip, ip, #NN */
2187 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2188 0x00000000, /* unused */
2191 #else /* not FOUR_WORD_PLT */
2193 /* The first entry in a procedure linkage table looks like
2194 this. It is set up so that any shared library function that is
2195 called before the relocation has been set up calls the dynamic
2197 static const bfd_vma elf32_arm_plt0_entry
[] =
2199 0xe52de004, /* str lr, [sp, #-4]! */
2200 0xe59fe004, /* ldr lr, [pc, #4] */
2201 0xe08fe00e, /* add lr, pc, lr */
2202 0xe5bef008, /* ldr pc, [lr, #8]! */
2203 0x00000000, /* &GOT[0] - . */
2206 /* By default subsequent entries in a procedure linkage table look like
2207 this. Offsets that don't fit into 28 bits will cause link error. */
2208 static const bfd_vma elf32_arm_plt_entry_short
[] =
2210 0xe28fc600, /* add ip, pc, #0xNN00000 */
2211 0xe28cca00, /* add ip, ip, #0xNN000 */
2212 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2215 /* When explicitly asked, we'll use this "long" entry format
2216 which can cope with arbitrary displacements. */
2217 static const bfd_vma elf32_arm_plt_entry_long
[] =
2219 0xe28fc200, /* add ip, pc, #0xN0000000 */
2220 0xe28cc600, /* add ip, ip, #0xNN00000 */
2221 0xe28cca00, /* add ip, ip, #0xNN000 */
2222 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2225 static bfd_boolean elf32_arm_use_long_plt_entry
= FALSE
;
2227 #endif /* not FOUR_WORD_PLT */
2229 /* The first entry in a procedure linkage table looks like this.
2230 It is set up so that any shared library function that is called before the
2231 relocation has been set up calls the dynamic linker first. */
2232 static const bfd_vma elf32_thumb2_plt0_entry
[] =
2234 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2235 an instruction maybe encoded to one or two array elements. */
2236 0xf8dfb500, /* push {lr} */
2237 0x44fee008, /* ldr.w lr, [pc, #8] */
2239 0xff08f85e, /* ldr.w pc, [lr, #8]! */
2240 0x00000000, /* &GOT[0] - . */
2243 /* Subsequent entries in a procedure linkage table for thumb only target
2245 static const bfd_vma elf32_thumb2_plt_entry
[] =
2247 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2248 an instruction maybe encoded to one or two array elements. */
2249 0x0c00f240, /* movw ip, #0xNNNN */
2250 0x0c00f2c0, /* movt ip, #0xNNNN */
2251 0xf8dc44fc, /* add ip, pc */
2252 0xbf00f000 /* ldr.w pc, [ip] */
2256 /* The format of the first entry in the procedure linkage table
2257 for a VxWorks executable. */
2258 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry
[] =
2260 0xe52dc008, /* str ip,[sp,#-8]! */
2261 0xe59fc000, /* ldr ip,[pc] */
2262 0xe59cf008, /* ldr pc,[ip,#8] */
2263 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2266 /* The format of subsequent entries in a VxWorks executable. */
2267 static const bfd_vma elf32_arm_vxworks_exec_plt_entry
[] =
2269 0xe59fc000, /* ldr ip,[pc] */
2270 0xe59cf000, /* ldr pc,[ip] */
2271 0x00000000, /* .long @got */
2272 0xe59fc000, /* ldr ip,[pc] */
2273 0xea000000, /* b _PLT */
2274 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2277 /* The format of entries in a VxWorks shared library. */
2278 static const bfd_vma elf32_arm_vxworks_shared_plt_entry
[] =
2280 0xe59fc000, /* ldr ip,[pc] */
2281 0xe79cf009, /* ldr pc,[ip,r9] */
2282 0x00000000, /* .long @got */
2283 0xe59fc000, /* ldr ip,[pc] */
2284 0xe599f008, /* ldr pc,[r9,#8] */
2285 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2288 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2289 #define PLT_THUMB_STUB_SIZE 4
2290 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
2296 /* The entries in a PLT when using a DLL-based target with multiple
2298 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
2300 0xe51ff004, /* ldr pc, [pc, #-4] */
2301 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2304 /* The first entry in a procedure linkage table looks like
2305 this. It is set up so that any shared library function that is
2306 called before the relocation has been set up calls the dynamic
2308 static const bfd_vma elf32_arm_nacl_plt0_entry
[] =
2311 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2312 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2313 0xe08cc00f, /* add ip, ip, pc */
2314 0xe52dc008, /* str ip, [sp, #-8]! */
2315 /* Second bundle: */
2316 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2317 0xe59cc000, /* ldr ip, [ip] */
2318 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2319 0xe12fff1c, /* bx ip */
2321 0xe320f000, /* nop */
2322 0xe320f000, /* nop */
2323 0xe320f000, /* nop */
2325 0xe50dc004, /* str ip, [sp, #-4] */
2326 /* Fourth bundle: */
2327 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2328 0xe59cc000, /* ldr ip, [ip] */
2329 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2330 0xe12fff1c, /* bx ip */
2332 #define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2334 /* Subsequent entries in a procedure linkage table look like this. */
2335 static const bfd_vma elf32_arm_nacl_plt_entry
[] =
2337 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2338 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2339 0xe08cc00f, /* add ip, ip, pc */
2340 0xea000000, /* b .Lplt_tail */
2343 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2344 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2345 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2346 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2347 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2348 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2349 #define THM2_MAX_FWD_COND_BRANCH_OFFSET (((1 << 20) -2) + 4)
2350 #define THM2_MAX_BWD_COND_BRANCH_OFFSET (-(1 << 20) + 4)
2360 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2361 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2362 is inserted in arm_build_one_stub(). */
2363 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2364 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2365 #define THUMB32_MOVT(X) {(X), THUMB32_TYPE, R_ARM_THM_MOVT_ABS, 0}
2366 #define THUMB32_MOVW(X) {(X), THUMB32_TYPE, R_ARM_THM_MOVW_ABS_NC, 0}
2367 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2368 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2369 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2370 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2375 enum stub_insn_type type
;
2376 unsigned int r_type
;
2380 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2381 to reach the stub if necessary. */
2382 static const insn_sequence elf32_arm_stub_long_branch_any_any
[] =
2384 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2385 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2388 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2390 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb
[] =
2392 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2393 ARM_INSN (0xe12fff1c), /* bx ip */
2394 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2397 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2398 static const insn_sequence elf32_arm_stub_long_branch_thumb_only
[] =
2400 THUMB16_INSN (0xb401), /* push {r0} */
2401 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2402 THUMB16_INSN (0x4684), /* mov ip, r0 */
2403 THUMB16_INSN (0xbc01), /* pop {r0} */
2404 THUMB16_INSN (0x4760), /* bx ip */
2405 THUMB16_INSN (0xbf00), /* nop */
2406 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2409 /* Thumb -> Thumb long branch stub in thumb2 encoding. Used on armv7. */
2410 static const insn_sequence elf32_arm_stub_long_branch_thumb2_only
[] =
2412 THUMB32_INSN (0xf85ff000), /* ldr.w pc, [pc, #-0] */
2413 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(x) */
2416 /* Thumb -> Thumb long branch stub. Used for PureCode sections on Thumb2
2417 M-profile architectures. */
2418 static const insn_sequence elf32_arm_stub_long_branch_thumb2_only_pure
[] =
2420 THUMB32_MOVW (0xf2400c00), /* mov.w ip, R_ARM_MOVW_ABS_NC */
2421 THUMB32_MOVT (0xf2c00c00), /* movt ip, R_ARM_MOVT_ABS << 16 */
2422 THUMB16_INSN (0x4760), /* bx ip */
2425 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2427 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb
[] =
2429 THUMB16_INSN (0x4778), /* bx pc */
2430 THUMB16_INSN (0x46c0), /* nop */
2431 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2432 ARM_INSN (0xe12fff1c), /* bx ip */
2433 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2436 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2438 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm
[] =
2440 THUMB16_INSN (0x4778), /* bx pc */
2441 THUMB16_INSN (0x46c0), /* nop */
2442 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2443 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2446 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2447 one, when the destination is close enough. */
2448 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm
[] =
2450 THUMB16_INSN (0x4778), /* bx pc */
2451 THUMB16_INSN (0x46c0), /* nop */
2452 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2455 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2456 blx to reach the stub if necessary. */
2457 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic
[] =
2459 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2460 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
2461 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2464 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2465 blx to reach the stub if necessary. We can not add into pc;
2466 it is not guaranteed to mode switch (different in ARMv6 and
2468 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic
[] =
2470 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2471 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2472 ARM_INSN (0xe12fff1c), /* bx ip */
2473 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2476 /* V4T ARM -> ARM long branch stub, PIC. */
2477 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic
[] =
2479 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2480 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2481 ARM_INSN (0xe12fff1c), /* bx ip */
2482 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2485 /* V4T Thumb -> ARM long branch stub, PIC. */
2486 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic
[] =
2488 THUMB16_INSN (0x4778), /* bx pc */
2489 THUMB16_INSN (0x46c0), /* nop */
2490 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2491 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
2492 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2495 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2497 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic
[] =
2499 THUMB16_INSN (0xb401), /* push {r0} */
2500 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2501 THUMB16_INSN (0x46fc), /* mov ip, pc */
2502 THUMB16_INSN (0x4484), /* add ip, r0 */
2503 THUMB16_INSN (0xbc01), /* pop {r0} */
2504 THUMB16_INSN (0x4760), /* bx ip */
2505 DATA_WORD (0, R_ARM_REL32
, 4), /* dcd R_ARM_REL32(X) */
2508 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2510 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic
[] =
2512 THUMB16_INSN (0x4778), /* bx pc */
2513 THUMB16_INSN (0x46c0), /* nop */
2514 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2515 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2516 ARM_INSN (0xe12fff1c), /* bx ip */
2517 DATA_WORD (0, R_ARM_REL32
, 0), /* dcd R_ARM_REL32(X) */
2520 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2521 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2522 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic
[] =
2524 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2525 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
2526 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X-4) */
2529 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2530 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2531 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic
[] =
2533 THUMB16_INSN (0x4778), /* bx pc */
2534 THUMB16_INSN (0x46c0), /* nop */
2535 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2536 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
2537 DATA_WORD (0, R_ARM_REL32
, -4), /* dcd R_ARM_REL32(X) */
2540 /* NaCl ARM -> ARM long branch stub. */
2541 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl
[] =
2543 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2544 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2545 ARM_INSN (0xe12fff1c), /* bx ip */
2546 ARM_INSN (0xe320f000), /* nop */
2547 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2548 DATA_WORD (0, R_ARM_ABS32
, 0), /* dcd R_ARM_ABS32(X) */
2549 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2550 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2553 /* NaCl ARM -> ARM long branch stub, PIC. */
2554 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl_pic
[] =
2556 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2557 ARM_INSN (0xe08cc00f), /* add ip, ip, pc */
2558 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2559 ARM_INSN (0xe12fff1c), /* bx ip */
2560 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2561 DATA_WORD (0, R_ARM_REL32
, 8), /* dcd R_ARM_REL32(X+8) */
2562 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2563 DATA_WORD (0, R_ARM_NONE
, 0), /* .word 0 */
2566 /* Stub used for transition to secure state (aka SG veneer). */
2567 static const insn_sequence elf32_arm_stub_cmse_branch_thumb_only
[] =
2569 THUMB32_INSN (0xe97fe97f), /* sg. */
2570 THUMB32_B_INSN (0xf000b800, -4), /* b.w original_branch_dest. */
2574 /* Cortex-A8 erratum-workaround stubs. */
2576 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2577 can't use a conditional branch to reach this stub). */
2579 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond
[] =
2581 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
2582 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2583 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2586 /* Stub used for b.w and bl.w instructions. */
2588 static const insn_sequence elf32_arm_stub_a8_veneer_b
[] =
2590 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2593 static const insn_sequence elf32_arm_stub_a8_veneer_bl
[] =
2595 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2598 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2599 instruction (which switches to ARM mode) to point to this stub. Jump to the
2600 real destination using an ARM-mode branch. */
2602 static const insn_sequence elf32_arm_stub_a8_veneer_blx
[] =
2604 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2607 /* For each section group there can be a specially created linker section
2608 to hold the stubs for that group. The name of the stub section is based
2609 upon the name of another section within that group with the suffix below
2612 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2613 create what appeared to be a linker stub section when it actually
2614 contained user code/data. For example, consider this fragment:
2616 const char * stubborn_problems[] = { "np" };
2618 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2621 .data.rel.local.stubborn_problems
2623 This then causes problems in arm32_arm_build_stubs() as it triggers:
2625 // Ignore non-stub sections.
2626 if (!strstr (stub_sec->name, STUB_SUFFIX))
2629 And so the section would be ignored instead of being processed. Hence
2630 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2632 #define STUB_SUFFIX ".__stub"
2634 /* One entry per long/short branch stub defined above. */
2636 DEF_STUB(long_branch_any_any) \
2637 DEF_STUB(long_branch_v4t_arm_thumb) \
2638 DEF_STUB(long_branch_thumb_only) \
2639 DEF_STUB(long_branch_v4t_thumb_thumb) \
2640 DEF_STUB(long_branch_v4t_thumb_arm) \
2641 DEF_STUB(short_branch_v4t_thumb_arm) \
2642 DEF_STUB(long_branch_any_arm_pic) \
2643 DEF_STUB(long_branch_any_thumb_pic) \
2644 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2645 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2646 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2647 DEF_STUB(long_branch_thumb_only_pic) \
2648 DEF_STUB(long_branch_any_tls_pic) \
2649 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2650 DEF_STUB(long_branch_arm_nacl) \
2651 DEF_STUB(long_branch_arm_nacl_pic) \
2652 DEF_STUB(cmse_branch_thumb_only) \
2653 DEF_STUB(a8_veneer_b_cond) \
2654 DEF_STUB(a8_veneer_b) \
2655 DEF_STUB(a8_veneer_bl) \
2656 DEF_STUB(a8_veneer_blx) \
2657 DEF_STUB(long_branch_thumb2_only) \
2658 DEF_STUB(long_branch_thumb2_only_pure)
2660 #define DEF_STUB(x) arm_stub_##x,
2661 enum elf32_arm_stub_type
2669 /* Note the first a8_veneer type. */
2670 const unsigned arm_stub_a8_veneer_lwm
= arm_stub_a8_veneer_b_cond
;
2674 const insn_sequence
* template_sequence
;
2678 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2679 static const stub_def stub_definitions
[] =
2685 struct elf32_arm_stub_hash_entry
2687 /* Base hash table entry structure. */
2688 struct bfd_hash_entry root
;
2690 /* The stub section. */
2693 /* Offset within stub_sec of the beginning of this stub. */
2694 bfd_vma stub_offset
;
2696 /* Given the symbol's value and its section we can determine its final
2697 value when building the stubs (so the stub knows where to jump). */
2698 bfd_vma target_value
;
2699 asection
*target_section
;
2701 /* Same as above but for the source of the branch to the stub. Used for
2702 Cortex-A8 erratum workaround to patch it to branch to the stub. As
2703 such, source section does not need to be recorded since Cortex-A8 erratum
2704 workaround stubs are only generated when both source and target are in the
2706 bfd_vma source_value
;
2708 /* The instruction which caused this stub to be generated (only valid for
2709 Cortex-A8 erratum workaround stubs at present). */
2710 unsigned long orig_insn
;
2712 /* The stub type. */
2713 enum elf32_arm_stub_type stub_type
;
2714 /* Its encoding size in bytes. */
2717 const insn_sequence
*stub_template
;
2718 /* The size of the template (number of entries). */
2719 int stub_template_size
;
2721 /* The symbol table entry, if any, that this was derived from. */
2722 struct elf32_arm_link_hash_entry
*h
;
2724 /* Type of branch. */
2725 enum arm_st_branch_type branch_type
;
2727 /* Where this stub is being called from, or, in the case of combined
2728 stub sections, the first input section in the group. */
2731 /* The name for the local symbol at the start of this stub. The
2732 stub name in the hash table has to be unique; this does not, so
2733 it can be friendlier. */
2737 /* Used to build a map of a section. This is required for mixed-endian
2740 typedef struct elf32_elf_section_map
2745 elf32_arm_section_map
;
2747 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2751 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
,
2752 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
,
2753 VFP11_ERRATUM_ARM_VENEER
,
2754 VFP11_ERRATUM_THUMB_VENEER
2756 elf32_vfp11_erratum_type
;
2758 typedef struct elf32_vfp11_erratum_list
2760 struct elf32_vfp11_erratum_list
*next
;
2766 struct elf32_vfp11_erratum_list
*veneer
;
2767 unsigned int vfp_insn
;
2771 struct elf32_vfp11_erratum_list
*branch
;
2775 elf32_vfp11_erratum_type type
;
2777 elf32_vfp11_erratum_list
;
2779 /* Information about a STM32L4XX erratum veneer, or a branch to such a
2783 STM32L4XX_ERRATUM_BRANCH_TO_VENEER
,
2784 STM32L4XX_ERRATUM_VENEER
2786 elf32_stm32l4xx_erratum_type
;
2788 typedef struct elf32_stm32l4xx_erratum_list
2790 struct elf32_stm32l4xx_erratum_list
*next
;
2796 struct elf32_stm32l4xx_erratum_list
*veneer
;
2801 struct elf32_stm32l4xx_erratum_list
*branch
;
2805 elf32_stm32l4xx_erratum_type type
;
2807 elf32_stm32l4xx_erratum_list
;
2812 INSERT_EXIDX_CANTUNWIND_AT_END
2814 arm_unwind_edit_type
;
2816 /* A (sorted) list of edits to apply to an unwind table. */
2817 typedef struct arm_unwind_table_edit
2819 arm_unwind_edit_type type
;
2820 /* Note: we sometimes want to insert an unwind entry corresponding to a
2821 section different from the one we're currently writing out, so record the
2822 (text) section this edit relates to here. */
2823 asection
*linked_section
;
2825 struct arm_unwind_table_edit
*next
;
2827 arm_unwind_table_edit
;
2829 typedef struct _arm_elf_section_data
2831 /* Information about mapping symbols. */
2832 struct bfd_elf_section_data elf
;
2833 unsigned int mapcount
;
2834 unsigned int mapsize
;
2835 elf32_arm_section_map
*map
;
2836 /* Information about CPU errata. */
2837 unsigned int erratumcount
;
2838 elf32_vfp11_erratum_list
*erratumlist
;
2839 unsigned int stm32l4xx_erratumcount
;
2840 elf32_stm32l4xx_erratum_list
*stm32l4xx_erratumlist
;
2841 unsigned int additional_reloc_count
;
2842 /* Information about unwind tables. */
2845 /* Unwind info attached to a text section. */
2848 asection
*arm_exidx_sec
;
2851 /* Unwind info attached to an .ARM.exidx section. */
2854 arm_unwind_table_edit
*unwind_edit_list
;
2855 arm_unwind_table_edit
*unwind_edit_tail
;
2859 _arm_elf_section_data
;
2861 #define elf32_arm_section_data(sec) \
2862 ((_arm_elf_section_data *) elf_section_data (sec))
2864 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2865 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2866 so may be created multiple times: we use an array of these entries whilst
2867 relaxing which we can refresh easily, then create stubs for each potentially
2868 erratum-triggering instruction once we've settled on a solution. */
2870 struct a8_erratum_fix
2875 bfd_vma target_offset
;
2876 unsigned long orig_insn
;
2878 enum elf32_arm_stub_type stub_type
;
2879 enum arm_st_branch_type branch_type
;
2882 /* A table of relocs applied to branches which might trigger Cortex-A8
2885 struct a8_erratum_reloc
2888 bfd_vma destination
;
2889 struct elf32_arm_link_hash_entry
*hash
;
2890 const char *sym_name
;
2891 unsigned int r_type
;
2892 enum arm_st_branch_type branch_type
;
2893 bfd_boolean non_a8_stub
;
2896 /* The size of the thread control block. */
2899 /* ARM-specific information about a PLT entry, over and above the usual
2903 /* We reference count Thumb references to a PLT entry separately,
2904 so that we can emit the Thumb trampoline only if needed. */
2905 bfd_signed_vma thumb_refcount
;
2907 /* Some references from Thumb code may be eliminated by BL->BLX
2908 conversion, so record them separately. */
2909 bfd_signed_vma maybe_thumb_refcount
;
2911 /* How many of the recorded PLT accesses were from non-call relocations.
2912 This information is useful when deciding whether anything takes the
2913 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2914 non-call references to the function should resolve directly to the
2915 real runtime target. */
2916 unsigned int noncall_refcount
;
2918 /* Since PLT entries have variable size if the Thumb prologue is
2919 used, we need to record the index into .got.plt instead of
2920 recomputing it from the PLT offset. */
2921 bfd_signed_vma got_offset
;
2924 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2925 struct arm_local_iplt_info
2927 /* The information that is usually found in the generic ELF part of
2928 the hash table entry. */
2929 union gotplt_union root
;
2931 /* The information that is usually found in the ARM-specific part of
2932 the hash table entry. */
2933 struct arm_plt_info arm
;
2935 /* A list of all potential dynamic relocations against this symbol. */
2936 struct elf_dyn_relocs
*dyn_relocs
;
2939 struct elf_arm_obj_tdata
2941 struct elf_obj_tdata root
;
2943 /* tls_type for each local got entry. */
2944 char *local_got_tls_type
;
2946 /* GOTPLT entries for TLS descriptors. */
2947 bfd_vma
*local_tlsdesc_gotent
;
2949 /* Information for local symbols that need entries in .iplt. */
2950 struct arm_local_iplt_info
**local_iplt
;
2952 /* Zero to warn when linking objects with incompatible enum sizes. */
2953 int no_enum_size_warning
;
2955 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2956 int no_wchar_size_warning
;
2959 #define elf_arm_tdata(bfd) \
2960 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2962 #define elf32_arm_local_got_tls_type(bfd) \
2963 (elf_arm_tdata (bfd)->local_got_tls_type)
2965 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2966 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2968 #define elf32_arm_local_iplt(bfd) \
2969 (elf_arm_tdata (bfd)->local_iplt)
2971 #define is_arm_elf(bfd) \
2972 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2973 && elf_tdata (bfd) != NULL \
2974 && elf_object_id (bfd) == ARM_ELF_DATA)
2977 elf32_arm_mkobject (bfd
*abfd
)
2979 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_arm_obj_tdata
),
2983 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2985 /* Arm ELF linker hash entry. */
2986 struct elf32_arm_link_hash_entry
2988 struct elf_link_hash_entry root
;
2990 /* Track dynamic relocs copied for this symbol. */
2991 struct elf_dyn_relocs
*dyn_relocs
;
2993 /* ARM-specific PLT information. */
2994 struct arm_plt_info plt
;
2996 #define GOT_UNKNOWN 0
2997 #define GOT_NORMAL 1
2998 #define GOT_TLS_GD 2
2999 #define GOT_TLS_IE 4
3000 #define GOT_TLS_GDESC 8
3001 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
3002 unsigned int tls_type
: 8;
3004 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
3005 unsigned int is_iplt
: 1;
3007 unsigned int unused
: 23;
3009 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
3010 starting at the end of the jump table. */
3011 bfd_vma tlsdesc_got
;
3013 /* The symbol marking the real symbol location for exported thumb
3014 symbols with Arm stubs. */
3015 struct elf_link_hash_entry
*export_glue
;
3017 /* A pointer to the most recently used stub hash entry against this
3019 struct elf32_arm_stub_hash_entry
*stub_cache
;
3022 /* Traverse an arm ELF linker hash table. */
3023 #define elf32_arm_link_hash_traverse(table, func, info) \
3024 (elf_link_hash_traverse \
3026 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
3029 /* Get the ARM elf linker hash table from a link_info structure. */
3030 #define elf32_arm_hash_table(info) \
3031 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
3032 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
3034 #define arm_stub_hash_lookup(table, string, create, copy) \
3035 ((struct elf32_arm_stub_hash_entry *) \
3036 bfd_hash_lookup ((table), (string), (create), (copy)))
3038 /* Array to keep track of which stub sections have been created, and
3039 information on stub grouping. */
3042 /* This is the section to which stubs in the group will be
3045 /* The stub section. */
3049 #define elf32_arm_compute_jump_table_size(htab) \
3050 ((htab)->next_tls_desc_index * 4)
3052 /* ARM ELF linker hash table. */
3053 struct elf32_arm_link_hash_table
3055 /* The main hash table. */
3056 struct elf_link_hash_table root
;
3058 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
3059 bfd_size_type thumb_glue_size
;
3061 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
3062 bfd_size_type arm_glue_size
;
3064 /* The size in bytes of section containing the ARMv4 BX veneers. */
3065 bfd_size_type bx_glue_size
;
3067 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
3068 veneer has been populated. */
3069 bfd_vma bx_glue_offset
[15];
3071 /* The size in bytes of the section containing glue for VFP11 erratum
3073 bfd_size_type vfp11_erratum_glue_size
;
3075 /* The size in bytes of the section containing glue for STM32L4XX erratum
3077 bfd_size_type stm32l4xx_erratum_glue_size
;
3079 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
3080 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
3081 elf32_arm_write_section(). */
3082 struct a8_erratum_fix
*a8_erratum_fixes
;
3083 unsigned int num_a8_erratum_fixes
;
3085 /* An arbitrary input BFD chosen to hold the glue sections. */
3086 bfd
* bfd_of_glue_owner
;
3088 /* Nonzero to output a BE8 image. */
3091 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
3092 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
3095 /* The relocation to use for R_ARM_TARGET2 relocations. */
3098 /* 0 = Ignore R_ARM_V4BX.
3099 1 = Convert BX to MOV PC.
3100 2 = Generate v4 interworing stubs. */
3103 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
3106 /* Whether we should fix the ARM1176 BLX immediate issue. */
3109 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
3112 /* What sort of code sequences we should look for which may trigger the
3113 VFP11 denorm erratum. */
3114 bfd_arm_vfp11_fix vfp11_fix
;
3116 /* Global counter for the number of fixes we have emitted. */
3117 int num_vfp11_fixes
;
3119 /* What sort of code sequences we should look for which may trigger the
3120 STM32L4XX erratum. */
3121 bfd_arm_stm32l4xx_fix stm32l4xx_fix
;
3123 /* Global counter for the number of fixes we have emitted. */
3124 int num_stm32l4xx_fixes
;
3126 /* Nonzero to force PIC branch veneers. */
3129 /* The number of bytes in the initial entry in the PLT. */
3130 bfd_size_type plt_header_size
;
3132 /* The number of bytes in the subsequent PLT etries. */
3133 bfd_size_type plt_entry_size
;
3135 /* True if the target system is VxWorks. */
3138 /* True if the target system is Symbian OS. */
3141 /* True if the target system is Native Client. */
3144 /* True if the target uses REL relocations. */
3147 /* Nonzero if import library must be a secure gateway import library
3148 as per ARMv8-M Security Extensions. */
3151 /* The import library whose symbols' address must remain stable in
3152 the import library generated. */
3155 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
3156 bfd_vma next_tls_desc_index
;
3158 /* How many R_ARM_TLS_DESC relocations were generated so far. */
3159 bfd_vma num_tls_desc
;
3161 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
3164 /* The offset into splt of the PLT entry for the TLS descriptor
3165 resolver. Special values are 0, if not necessary (or not found
3166 to be necessary yet), and -1 if needed but not determined
3168 bfd_vma dt_tlsdesc_plt
;
3170 /* The offset into sgot of the GOT entry used by the PLT entry
3172 bfd_vma dt_tlsdesc_got
;
3174 /* Offset in .plt section of tls_arm_trampoline. */
3175 bfd_vma tls_trampoline
;
3177 /* Data for R_ARM_TLS_LDM32 relocations. */
3180 bfd_signed_vma refcount
;
3184 /* Small local sym cache. */
3185 struct sym_cache sym_cache
;
3187 /* For convenience in allocate_dynrelocs. */
3190 /* The amount of space used by the reserved portion of the sgotplt
3191 section, plus whatever space is used by the jump slots. */
3192 bfd_vma sgotplt_jump_table_size
;
3194 /* The stub hash table. */
3195 struct bfd_hash_table stub_hash_table
;
3197 /* Linker stub bfd. */
3200 /* Linker call-backs. */
3201 asection
* (*add_stub_section
) (const char *, asection
*, asection
*,
3203 void (*layout_sections_again
) (void);
3205 /* Array to keep track of which stub sections have been created, and
3206 information on stub grouping. */
3207 struct map_stub
*stub_group
;
3209 /* Input stub section holding secure gateway veneers. */
3210 asection
*cmse_stub_sec
;
3212 /* Offset in cmse_stub_sec where new SG veneers (not in input import library)
3213 start to be allocated. */
3214 bfd_vma new_cmse_stub_offset
;
3216 /* Number of elements in stub_group. */
3217 unsigned int top_id
;
3219 /* Assorted information used by elf32_arm_size_stubs. */
3220 unsigned int bfd_count
;
3221 unsigned int top_index
;
3222 asection
**input_list
;
3226 ctz (unsigned int mask
)
3228 #if GCC_VERSION >= 3004
3229 return __builtin_ctz (mask
);
3233 for (i
= 0; i
< 8 * sizeof (mask
); i
++)
3244 elf32_arm_popcount (unsigned int mask
)
3246 #if GCC_VERSION >= 3004
3247 return __builtin_popcount (mask
);
3252 for (i
= 0; i
< 8 * sizeof (mask
); i
++)
3262 /* Create an entry in an ARM ELF linker hash table. */
3264 static struct bfd_hash_entry
*
3265 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
3266 struct bfd_hash_table
* table
,
3267 const char * string
)
3269 struct elf32_arm_link_hash_entry
* ret
=
3270 (struct elf32_arm_link_hash_entry
*) entry
;
3272 /* Allocate the structure if it has not already been allocated by a
3275 ret
= (struct elf32_arm_link_hash_entry
*)
3276 bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
3278 return (struct bfd_hash_entry
*) ret
;
3280 /* Call the allocation method of the superclass. */
3281 ret
= ((struct elf32_arm_link_hash_entry
*)
3282 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
3286 ret
->dyn_relocs
= NULL
;
3287 ret
->tls_type
= GOT_UNKNOWN
;
3288 ret
->tlsdesc_got
= (bfd_vma
) -1;
3289 ret
->plt
.thumb_refcount
= 0;
3290 ret
->plt
.maybe_thumb_refcount
= 0;
3291 ret
->plt
.noncall_refcount
= 0;
3292 ret
->plt
.got_offset
= -1;
3293 ret
->is_iplt
= FALSE
;
3294 ret
->export_glue
= NULL
;
3296 ret
->stub_cache
= NULL
;
3299 return (struct bfd_hash_entry
*) ret
;
3302 /* Ensure that we have allocated bookkeeping structures for ABFD's local
3306 elf32_arm_allocate_local_sym_info (bfd
*abfd
)
3308 if (elf_local_got_refcounts (abfd
) == NULL
)
3310 bfd_size_type num_syms
;
3314 num_syms
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
3315 size
= num_syms
* (sizeof (bfd_signed_vma
)
3316 + sizeof (struct arm_local_iplt_info
*)
3319 data
= bfd_zalloc (abfd
, size
);
3323 elf_local_got_refcounts (abfd
) = (bfd_signed_vma
*) data
;
3324 data
+= num_syms
* sizeof (bfd_signed_vma
);
3326 elf32_arm_local_iplt (abfd
) = (struct arm_local_iplt_info
**) data
;
3327 data
+= num_syms
* sizeof (struct arm_local_iplt_info
*);
3329 elf32_arm_local_tlsdesc_gotent (abfd
) = (bfd_vma
*) data
;
3330 data
+= num_syms
* sizeof (bfd_vma
);
3332 elf32_arm_local_got_tls_type (abfd
) = data
;
3337 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
3338 to input bfd ABFD. Create the information if it doesn't already exist.
3339 Return null if an allocation fails. */
3341 static struct arm_local_iplt_info
*
3342 elf32_arm_create_local_iplt (bfd
*abfd
, unsigned long r_symndx
)
3344 struct arm_local_iplt_info
**ptr
;
3346 if (!elf32_arm_allocate_local_sym_info (abfd
))
3349 BFD_ASSERT (r_symndx
< elf_tdata (abfd
)->symtab_hdr
.sh_info
);
3350 ptr
= &elf32_arm_local_iplt (abfd
)[r_symndx
];
3352 *ptr
= bfd_zalloc (abfd
, sizeof (**ptr
));
3356 /* Try to obtain PLT information for the symbol with index R_SYMNDX
3357 in ABFD's symbol table. If the symbol is global, H points to its
3358 hash table entry, otherwise H is null.
3360 Return true if the symbol does have PLT information. When returning
3361 true, point *ROOT_PLT at the target-independent reference count/offset
3362 union and *ARM_PLT at the ARM-specific information. */
3365 elf32_arm_get_plt_info (bfd
*abfd
, struct elf32_arm_link_hash_table
*globals
,
3366 struct elf32_arm_link_hash_entry
*h
,
3367 unsigned long r_symndx
, union gotplt_union
**root_plt
,
3368 struct arm_plt_info
**arm_plt
)
3370 struct arm_local_iplt_info
*local_iplt
;
3372 if (globals
->root
.splt
== NULL
&& globals
->root
.iplt
== NULL
)
3377 *root_plt
= &h
->root
.plt
;
3382 if (elf32_arm_local_iplt (abfd
) == NULL
)
3385 local_iplt
= elf32_arm_local_iplt (abfd
)[r_symndx
];
3386 if (local_iplt
== NULL
)
3389 *root_plt
= &local_iplt
->root
;
3390 *arm_plt
= &local_iplt
->arm
;
3394 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3398 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info
*info
,
3399 struct arm_plt_info
*arm_plt
)
3401 struct elf32_arm_link_hash_table
*htab
;
3403 htab
= elf32_arm_hash_table (info
);
3404 return (arm_plt
->thumb_refcount
!= 0
3405 || (!htab
->use_blx
&& arm_plt
->maybe_thumb_refcount
!= 0));
3408 /* Return a pointer to the head of the dynamic reloc list that should
3409 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3410 ABFD's symbol table. Return null if an error occurs. */
3412 static struct elf_dyn_relocs
**
3413 elf32_arm_get_local_dynreloc_list (bfd
*abfd
, unsigned long r_symndx
,
3414 Elf_Internal_Sym
*isym
)
3416 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3418 struct arm_local_iplt_info
*local_iplt
;
3420 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
3421 if (local_iplt
== NULL
)
3423 return &local_iplt
->dyn_relocs
;
3427 /* Track dynamic relocs needed for local syms too.
3428 We really need local syms available to do this
3433 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3437 vpp
= &elf_section_data (s
)->local_dynrel
;
3438 return (struct elf_dyn_relocs
**) vpp
;
3442 /* Initialize an entry in the stub hash table. */
3444 static struct bfd_hash_entry
*
3445 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
3446 struct bfd_hash_table
*table
,
3449 /* Allocate the structure if it has not already been allocated by a
3453 entry
= (struct bfd_hash_entry
*)
3454 bfd_hash_allocate (table
, sizeof (struct elf32_arm_stub_hash_entry
));
3459 /* Call the allocation method of the superclass. */
3460 entry
= bfd_hash_newfunc (entry
, table
, string
);
3463 struct elf32_arm_stub_hash_entry
*eh
;
3465 /* Initialize the local fields. */
3466 eh
= (struct elf32_arm_stub_hash_entry
*) entry
;
3467 eh
->stub_sec
= NULL
;
3468 eh
->stub_offset
= (bfd_vma
) -1;
3469 eh
->source_value
= 0;
3470 eh
->target_value
= 0;
3471 eh
->target_section
= NULL
;
3473 eh
->stub_type
= arm_stub_none
;
3475 eh
->stub_template
= NULL
;
3476 eh
->stub_template_size
= -1;
3479 eh
->output_name
= NULL
;
3485 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3486 shortcuts to them in our hash table. */
3489 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
3491 struct elf32_arm_link_hash_table
*htab
;
3493 htab
= elf32_arm_hash_table (info
);
3497 /* BPABI objects never have a GOT, or associated sections. */
3498 if (htab
->symbian_p
)
3501 if (! _bfd_elf_create_got_section (dynobj
, info
))
3507 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3510 create_ifunc_sections (struct bfd_link_info
*info
)
3512 struct elf32_arm_link_hash_table
*htab
;
3513 const struct elf_backend_data
*bed
;
3518 htab
= elf32_arm_hash_table (info
);
3519 dynobj
= htab
->root
.dynobj
;
3520 bed
= get_elf_backend_data (dynobj
);
3521 flags
= bed
->dynamic_sec_flags
;
3523 if (htab
->root
.iplt
== NULL
)
3525 s
= bfd_make_section_anyway_with_flags (dynobj
, ".iplt",
3526 flags
| SEC_READONLY
| SEC_CODE
);
3528 || !bfd_set_section_alignment (dynobj
, s
, bed
->plt_alignment
))
3530 htab
->root
.iplt
= s
;
3533 if (htab
->root
.irelplt
== NULL
)
3535 s
= bfd_make_section_anyway_with_flags (dynobj
,
3536 RELOC_SECTION (htab
, ".iplt"),
3537 flags
| SEC_READONLY
);
3539 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3541 htab
->root
.irelplt
= s
;
3544 if (htab
->root
.igotplt
== NULL
)
3546 s
= bfd_make_section_anyway_with_flags (dynobj
, ".igot.plt", flags
);
3548 || !bfd_set_section_alignment (dynobj
, s
, bed
->s
->log_file_align
))
3550 htab
->root
.igotplt
= s
;
3555 /* Determine if we're dealing with a Thumb only architecture. */
3558 using_thumb_only (struct elf32_arm_link_hash_table
*globals
)
3561 int profile
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3562 Tag_CPU_arch_profile
);
3565 return profile
== 'M';
3567 arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
3569 /* Force return logic to be reviewed for each new architecture. */
3570 BFD_ASSERT (arch
<= TAG_CPU_ARCH_V8M_MAIN
);
3572 if (arch
== TAG_CPU_ARCH_V6_M
3573 || arch
== TAG_CPU_ARCH_V6S_M
3574 || arch
== TAG_CPU_ARCH_V7E_M
3575 || arch
== TAG_CPU_ARCH_V8M_BASE
3576 || arch
== TAG_CPU_ARCH_V8M_MAIN
)
3582 /* Determine if we're dealing with a Thumb-2 object. */
3585 using_thumb2 (struct elf32_arm_link_hash_table
*globals
)
3588 int thumb_isa
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3592 return thumb_isa
== 2;
3594 arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
3596 /* Force return logic to be reviewed for each new architecture. */
3597 BFD_ASSERT (arch
<= TAG_CPU_ARCH_V8M_MAIN
);
3599 return (arch
== TAG_CPU_ARCH_V6T2
3600 || arch
== TAG_CPU_ARCH_V7
3601 || arch
== TAG_CPU_ARCH_V7E_M
3602 || arch
== TAG_CPU_ARCH_V8
3603 || arch
== TAG_CPU_ARCH_V8R
3604 || arch
== TAG_CPU_ARCH_V8M_MAIN
);
3607 /* Determine whether Thumb-2 BL instruction is available. */
3610 using_thumb2_bl (struct elf32_arm_link_hash_table
*globals
)
3613 bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
3615 /* Force return logic to be reviewed for each new architecture. */
3616 BFD_ASSERT (arch
<= TAG_CPU_ARCH_V8M_MAIN
);
3618 /* Architecture was introduced after ARMv6T2 (eg. ARMv6-M). */
3619 return (arch
== TAG_CPU_ARCH_V6T2
3620 || arch
>= TAG_CPU_ARCH_V7
);
3623 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3624 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3628 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
3630 struct elf32_arm_link_hash_table
*htab
;
3632 htab
= elf32_arm_hash_table (info
);
3636 if (!htab
->root
.sgot
&& !create_got_section (dynobj
, info
))
3639 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
3642 if (htab
->vxworks_p
)
3644 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
3647 if (bfd_link_pic (info
))
3649 htab
->plt_header_size
= 0;
3650 htab
->plt_entry_size
3651 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry
);
3655 htab
->plt_header_size
3656 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry
);
3657 htab
->plt_entry_size
3658 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry
);
3661 if (elf_elfheader (dynobj
))
3662 elf_elfheader (dynobj
)->e_ident
[EI_CLASS
] = ELFCLASS32
;
3667 Test for thumb only architectures. Note - we cannot just call
3668 using_thumb_only() as the attributes in the output bfd have not been
3669 initialised at this point, so instead we use the input bfd. */
3670 bfd
* saved_obfd
= htab
->obfd
;
3672 htab
->obfd
= dynobj
;
3673 if (using_thumb_only (htab
))
3675 htab
->plt_header_size
= 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry
);
3676 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_thumb2_plt_entry
);
3678 htab
->obfd
= saved_obfd
;
3681 if (!htab
->root
.splt
3682 || !htab
->root
.srelplt
3683 || !htab
->root
.sdynbss
3684 || (!bfd_link_pic (info
) && !htab
->root
.srelbss
))
3690 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3693 elf32_arm_copy_indirect_symbol (struct bfd_link_info
*info
,
3694 struct elf_link_hash_entry
*dir
,
3695 struct elf_link_hash_entry
*ind
)
3697 struct elf32_arm_link_hash_entry
*edir
, *eind
;
3699 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
3700 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
3702 if (eind
->dyn_relocs
!= NULL
)
3704 if (edir
->dyn_relocs
!= NULL
)
3706 struct elf_dyn_relocs
**pp
;
3707 struct elf_dyn_relocs
*p
;
3709 /* Add reloc counts against the indirect sym to the direct sym
3710 list. Merge any entries against the same section. */
3711 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
3713 struct elf_dyn_relocs
*q
;
3715 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
3716 if (q
->sec
== p
->sec
)
3718 q
->pc_count
+= p
->pc_count
;
3719 q
->count
+= p
->count
;
3726 *pp
= edir
->dyn_relocs
;
3729 edir
->dyn_relocs
= eind
->dyn_relocs
;
3730 eind
->dyn_relocs
= NULL
;
3733 if (ind
->root
.type
== bfd_link_hash_indirect
)
3735 /* Copy over PLT info. */
3736 edir
->plt
.thumb_refcount
+= eind
->plt
.thumb_refcount
;
3737 eind
->plt
.thumb_refcount
= 0;
3738 edir
->plt
.maybe_thumb_refcount
+= eind
->plt
.maybe_thumb_refcount
;
3739 eind
->plt
.maybe_thumb_refcount
= 0;
3740 edir
->plt
.noncall_refcount
+= eind
->plt
.noncall_refcount
;
3741 eind
->plt
.noncall_refcount
= 0;
3743 /* We should only allocate a function to .iplt once the final
3744 symbol information is known. */
3745 BFD_ASSERT (!eind
->is_iplt
);
3747 if (dir
->got
.refcount
<= 0)
3749 edir
->tls_type
= eind
->tls_type
;
3750 eind
->tls_type
= GOT_UNKNOWN
;
3754 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
3757 /* Destroy an ARM elf linker hash table. */
3760 elf32_arm_link_hash_table_free (bfd
*obfd
)
3762 struct elf32_arm_link_hash_table
*ret
3763 = (struct elf32_arm_link_hash_table
*) obfd
->link
.hash
;
3765 bfd_hash_table_free (&ret
->stub_hash_table
);
3766 _bfd_elf_link_hash_table_free (obfd
);
3769 /* Create an ARM elf linker hash table. */
3771 static struct bfd_link_hash_table
*
3772 elf32_arm_link_hash_table_create (bfd
*abfd
)
3774 struct elf32_arm_link_hash_table
*ret
;
3775 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
3777 ret
= (struct elf32_arm_link_hash_table
*) bfd_zmalloc (amt
);
3781 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
3782 elf32_arm_link_hash_newfunc
,
3783 sizeof (struct elf32_arm_link_hash_entry
),
3790 ret
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
3791 ret
->stm32l4xx_fix
= BFD_ARM_STM32L4XX_FIX_NONE
;
3792 #ifdef FOUR_WORD_PLT
3793 ret
->plt_header_size
= 16;
3794 ret
->plt_entry_size
= 16;
3796 ret
->plt_header_size
= 20;
3797 ret
->plt_entry_size
= elf32_arm_use_long_plt_entry
? 16 : 12;
3802 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
3803 sizeof (struct elf32_arm_stub_hash_entry
)))
3805 _bfd_elf_link_hash_table_free (abfd
);
3808 ret
->root
.root
.hash_table_free
= elf32_arm_link_hash_table_free
;
3810 return &ret
->root
.root
;
3813 /* Determine what kind of NOPs are available. */
3816 arch_has_arm_nop (struct elf32_arm_link_hash_table
*globals
)
3818 const int arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
3821 /* Force return logic to be reviewed for each new architecture. */
3822 BFD_ASSERT (arch
<= TAG_CPU_ARCH_V8M_MAIN
);
3824 return (arch
== TAG_CPU_ARCH_V6T2
3825 || arch
== TAG_CPU_ARCH_V6K
3826 || arch
== TAG_CPU_ARCH_V7
3827 || arch
== TAG_CPU_ARCH_V8
3828 || arch
== TAG_CPU_ARCH_V8R
);
3832 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type
)
3836 case arm_stub_long_branch_thumb_only
:
3837 case arm_stub_long_branch_thumb2_only
:
3838 case arm_stub_long_branch_thumb2_only_pure
:
3839 case arm_stub_long_branch_v4t_thumb_arm
:
3840 case arm_stub_short_branch_v4t_thumb_arm
:
3841 case arm_stub_long_branch_v4t_thumb_arm_pic
:
3842 case arm_stub_long_branch_v4t_thumb_tls_pic
:
3843 case arm_stub_long_branch_thumb_only_pic
:
3844 case arm_stub_cmse_branch_thumb_only
:
3855 /* Determine the type of stub needed, if any, for a call. */
3857 static enum elf32_arm_stub_type
3858 arm_type_of_stub (struct bfd_link_info
*info
,
3859 asection
*input_sec
,
3860 const Elf_Internal_Rela
*rel
,
3861 unsigned char st_type
,
3862 enum arm_st_branch_type
*actual_branch_type
,
3863 struct elf32_arm_link_hash_entry
*hash
,
3864 bfd_vma destination
,
3870 bfd_signed_vma branch_offset
;
3871 unsigned int r_type
;
3872 struct elf32_arm_link_hash_table
* globals
;
3873 bfd_boolean thumb2
, thumb2_bl
, thumb_only
;
3874 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
3876 enum arm_st_branch_type branch_type
= *actual_branch_type
;
3877 union gotplt_union
*root_plt
;
3878 struct arm_plt_info
*arm_plt
;
3882 if (branch_type
== ST_BRANCH_LONG
)
3885 globals
= elf32_arm_hash_table (info
);
3886 if (globals
== NULL
)
3889 thumb_only
= using_thumb_only (globals
);
3890 thumb2
= using_thumb2 (globals
);
3891 thumb2_bl
= using_thumb2_bl (globals
);
3893 arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
3895 /* True for architectures that implement the thumb2 movw instruction. */
3896 thumb2_movw
= thumb2
|| (arch
== TAG_CPU_ARCH_V8M_BASE
);
3898 /* Determine where the call point is. */
3899 location
= (input_sec
->output_offset
3900 + input_sec
->output_section
->vma
3903 r_type
= ELF32_R_TYPE (rel
->r_info
);
3905 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
3906 are considering a function call relocation. */
3907 if (thumb_only
&& (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
3908 || r_type
== R_ARM_THM_JUMP19
)
3909 && branch_type
== ST_BRANCH_TO_ARM
)
3910 branch_type
= ST_BRANCH_TO_THUMB
;
3912 /* For TLS call relocs, it is the caller's responsibility to provide
3913 the address of the appropriate trampoline. */
3914 if (r_type
!= R_ARM_TLS_CALL
3915 && r_type
!= R_ARM_THM_TLS_CALL
3916 && elf32_arm_get_plt_info (input_bfd
, globals
, hash
,
3917 ELF32_R_SYM (rel
->r_info
), &root_plt
,
3919 && root_plt
->offset
!= (bfd_vma
) -1)
3923 if (hash
== NULL
|| hash
->is_iplt
)
3924 splt
= globals
->root
.iplt
;
3926 splt
= globals
->root
.splt
;
3931 /* Note when dealing with PLT entries: the main PLT stub is in
3932 ARM mode, so if the branch is in Thumb mode, another
3933 Thumb->ARM stub will be inserted later just before the ARM
3934 PLT stub. If a long branch stub is needed, we'll add a
3935 Thumb->Arm one and branch directly to the ARM PLT entry.
3936 Here, we have to check if a pre-PLT Thumb->ARM stub
3937 is needed and if it will be close enough. */
3939 destination
= (splt
->output_section
->vma
3940 + splt
->output_offset
3941 + root_plt
->offset
);
3944 /* Thumb branch/call to PLT: it can become a branch to ARM
3945 or to Thumb. We must perform the same checks and
3946 corrections as in elf32_arm_final_link_relocate. */
3947 if ((r_type
== R_ARM_THM_CALL
)
3948 || (r_type
== R_ARM_THM_JUMP24
))
3950 if (globals
->use_blx
3951 && r_type
== R_ARM_THM_CALL
3954 /* If the Thumb BLX instruction is available, convert
3955 the BL to a BLX instruction to call the ARM-mode
3957 branch_type
= ST_BRANCH_TO_ARM
;
3962 /* Target the Thumb stub before the ARM PLT entry. */
3963 destination
-= PLT_THUMB_STUB_SIZE
;
3964 branch_type
= ST_BRANCH_TO_THUMB
;
3969 branch_type
= ST_BRANCH_TO_ARM
;
3973 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3974 BFD_ASSERT (st_type
!= STT_GNU_IFUNC
);
3976 branch_offset
= (bfd_signed_vma
)(destination
- location
);
3978 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
3979 || r_type
== R_ARM_THM_TLS_CALL
|| r_type
== R_ARM_THM_JUMP19
)
3981 /* Handle cases where:
3982 - this call goes too far (different Thumb/Thumb2 max
3984 - it's a Thumb->Arm call and blx is not available, or it's a
3985 Thumb->Arm branch (not bl). A stub is needed in this case,
3986 but only if this call is not through a PLT entry. Indeed,
3987 PLT stubs handle mode switching already. */
3989 && (branch_offset
> THM_MAX_FWD_BRANCH_OFFSET
3990 || (branch_offset
< THM_MAX_BWD_BRANCH_OFFSET
)))
3992 && (branch_offset
> THM2_MAX_FWD_BRANCH_OFFSET
3993 || (branch_offset
< THM2_MAX_BWD_BRANCH_OFFSET
)))
3995 && (branch_offset
> THM2_MAX_FWD_COND_BRANCH_OFFSET
3996 || (branch_offset
< THM2_MAX_BWD_COND_BRANCH_OFFSET
))
3997 && (r_type
== R_ARM_THM_JUMP19
))
3998 || (branch_type
== ST_BRANCH_TO_ARM
3999 && (((r_type
== R_ARM_THM_CALL
4000 || r_type
== R_ARM_THM_TLS_CALL
) && !globals
->use_blx
)
4001 || (r_type
== R_ARM_THM_JUMP24
)
4002 || (r_type
== R_ARM_THM_JUMP19
))
4005 /* If we need to insert a Thumb-Thumb long branch stub to a
4006 PLT, use one that branches directly to the ARM PLT
4007 stub. If we pretended we'd use the pre-PLT Thumb->ARM
4008 stub, undo this now. */
4009 if ((branch_type
== ST_BRANCH_TO_THUMB
) && use_plt
&& !thumb_only
)
4011 branch_type
= ST_BRANCH_TO_ARM
;
4012 branch_offset
+= PLT_THUMB_STUB_SIZE
;
4015 if (branch_type
== ST_BRANCH_TO_THUMB
)
4017 /* Thumb to thumb. */
4020 if (input_sec
->flags
& SEC_ELF_PURECODE
)
4022 (_("%B(%A): warning: long branch veneers used in"
4023 " section with SHF_ARM_PURECODE section"
4024 " attribute is only supported for M-profile"
4025 " targets that implement the movw instruction."),
4026 input_bfd
, input_sec
);
4028 stub_type
= (bfd_link_pic (info
) | globals
->pic_veneer
)
4030 ? ((globals
->use_blx
4031 && (r_type
== R_ARM_THM_CALL
))
4032 /* V5T and above. Stub starts with ARM code, so
4033 we must be able to switch mode before
4034 reaching it, which is only possible for 'bl'
4035 (ie R_ARM_THM_CALL relocation). */
4036 ? arm_stub_long_branch_any_thumb_pic
4037 /* On V4T, use Thumb code only. */
4038 : arm_stub_long_branch_v4t_thumb_thumb_pic
)
4040 /* non-PIC stubs. */
4041 : ((globals
->use_blx
4042 && (r_type
== R_ARM_THM_CALL
))
4043 /* V5T and above. */
4044 ? arm_stub_long_branch_any_any
4046 : arm_stub_long_branch_v4t_thumb_thumb
);
4050 if (thumb2_movw
&& (input_sec
->flags
& SEC_ELF_PURECODE
))
4051 stub_type
= arm_stub_long_branch_thumb2_only_pure
;
4054 if (input_sec
->flags
& SEC_ELF_PURECODE
)
4056 (_("%B(%A): warning: long branch veneers used in"
4057 " section with SHF_ARM_PURECODE section"
4058 " attribute is only supported for M-profile"
4059 " targets that implement the movw instruction."),
4060 input_bfd
, input_sec
);
4062 stub_type
= (bfd_link_pic (info
) | globals
->pic_veneer
)
4064 ? arm_stub_long_branch_thumb_only_pic
4066 : (thumb2
? arm_stub_long_branch_thumb2_only
4067 : arm_stub_long_branch_thumb_only
);
4073 if (input_sec
->flags
& SEC_ELF_PURECODE
)
4075 (_("%B(%A): warning: long branch veneers used in"
4076 " section with SHF_ARM_PURECODE section"
4077 " attribute is only supported" " for M-profile"
4078 " targets that implement the movw instruction."),
4079 input_bfd
, input_sec
);
4083 && sym_sec
->owner
!= NULL
4084 && !INTERWORK_FLAG (sym_sec
->owner
))
4087 (_("%B(%s): warning: interworking not enabled.\n"
4088 " first occurrence: %B: Thumb call to ARM"),
4089 sym_sec
->owner
, name
, input_bfd
);
4093 (bfd_link_pic (info
) | globals
->pic_veneer
)
4095 ? (r_type
== R_ARM_THM_TLS_CALL
4096 /* TLS PIC stubs. */
4097 ? (globals
->use_blx
? arm_stub_long_branch_any_tls_pic
4098 : arm_stub_long_branch_v4t_thumb_tls_pic
)
4099 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
4100 /* V5T PIC and above. */
4101 ? arm_stub_long_branch_any_arm_pic
4103 : arm_stub_long_branch_v4t_thumb_arm_pic
))
4105 /* non-PIC stubs. */
4106 : ((globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
4107 /* V5T and above. */
4108 ? arm_stub_long_branch_any_any
4110 : arm_stub_long_branch_v4t_thumb_arm
);
4112 /* Handle v4t short branches. */
4113 if ((stub_type
== arm_stub_long_branch_v4t_thumb_arm
)
4114 && (branch_offset
<= THM_MAX_FWD_BRANCH_OFFSET
)
4115 && (branch_offset
>= THM_MAX_BWD_BRANCH_OFFSET
))
4116 stub_type
= arm_stub_short_branch_v4t_thumb_arm
;
4120 else if (r_type
== R_ARM_CALL
4121 || r_type
== R_ARM_JUMP24
4122 || r_type
== R_ARM_PLT32
4123 || r_type
== R_ARM_TLS_CALL
)
4125 if (input_sec
->flags
& SEC_ELF_PURECODE
)
4127 (_("%B(%A): warning: long branch veneers used in"
4128 " section with SHF_ARM_PURECODE section"
4129 " attribute is only supported for M-profile"
4130 " targets that implement the movw instruction."),
4131 input_bfd
, input_sec
);
4132 if (branch_type
== ST_BRANCH_TO_THUMB
)
4137 && sym_sec
->owner
!= NULL
4138 && !INTERWORK_FLAG (sym_sec
->owner
))
4141 (_("%B(%s): warning: interworking not enabled.\n"
4142 " first occurrence: %B: ARM call to Thumb"),
4143 sym_sec
->owner
, name
, input_bfd
);
4146 /* We have an extra 2-bytes reach because of
4147 the mode change (bit 24 (H) of BLX encoding). */
4148 if (branch_offset
> (ARM_MAX_FWD_BRANCH_OFFSET
+ 2)
4149 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
)
4150 || (r_type
== R_ARM_CALL
&& !globals
->use_blx
)
4151 || (r_type
== R_ARM_JUMP24
)
4152 || (r_type
== R_ARM_PLT32
))
4154 stub_type
= (bfd_link_pic (info
) | globals
->pic_veneer
)
4156 ? ((globals
->use_blx
)
4157 /* V5T and above. */
4158 ? arm_stub_long_branch_any_thumb_pic
4160 : arm_stub_long_branch_v4t_arm_thumb_pic
)
4162 /* non-PIC stubs. */
4163 : ((globals
->use_blx
)
4164 /* V5T and above. */
4165 ? arm_stub_long_branch_any_any
4167 : arm_stub_long_branch_v4t_arm_thumb
);
4173 if (branch_offset
> ARM_MAX_FWD_BRANCH_OFFSET
4174 || (branch_offset
< ARM_MAX_BWD_BRANCH_OFFSET
))
4177 (bfd_link_pic (info
) | globals
->pic_veneer
)
4179 ? (r_type
== R_ARM_TLS_CALL
4181 ? arm_stub_long_branch_any_tls_pic
4183 ? arm_stub_long_branch_arm_nacl_pic
4184 : arm_stub_long_branch_any_arm_pic
))
4185 /* non-PIC stubs. */
4187 ? arm_stub_long_branch_arm_nacl
4188 : arm_stub_long_branch_any_any
);
4193 /* If a stub is needed, record the actual destination type. */
4194 if (stub_type
!= arm_stub_none
)
4195 *actual_branch_type
= branch_type
;
4200 /* Build a name for an entry in the stub hash table. */
4203 elf32_arm_stub_name (const asection
*input_section
,
4204 const asection
*sym_sec
,
4205 const struct elf32_arm_link_hash_entry
*hash
,
4206 const Elf_Internal_Rela
*rel
,
4207 enum elf32_arm_stub_type stub_type
)
4214 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 8 + 1 + 2 + 1;
4215 stub_name
= (char *) bfd_malloc (len
);
4216 if (stub_name
!= NULL
)
4217 sprintf (stub_name
, "%08x_%s+%x_%d",
4218 input_section
->id
& 0xffffffff,
4219 hash
->root
.root
.root
.string
,
4220 (int) rel
->r_addend
& 0xffffffff,
4225 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
4226 stub_name
= (char *) bfd_malloc (len
);
4227 if (stub_name
!= NULL
)
4228 sprintf (stub_name
, "%08x_%x:%x+%x_%d",
4229 input_section
->id
& 0xffffffff,
4230 sym_sec
->id
& 0xffffffff,
4231 ELF32_R_TYPE (rel
->r_info
) == R_ARM_TLS_CALL
4232 || ELF32_R_TYPE (rel
->r_info
) == R_ARM_THM_TLS_CALL
4233 ? 0 : (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
4234 (int) rel
->r_addend
& 0xffffffff,
4241 /* Look up an entry in the stub hash. Stub entries are cached because
4242 creating the stub name takes a bit of time. */
4244 static struct elf32_arm_stub_hash_entry
*
4245 elf32_arm_get_stub_entry (const asection
*input_section
,
4246 const asection
*sym_sec
,
4247 struct elf_link_hash_entry
*hash
,
4248 const Elf_Internal_Rela
*rel
,
4249 struct elf32_arm_link_hash_table
*htab
,
4250 enum elf32_arm_stub_type stub_type
)
4252 struct elf32_arm_stub_hash_entry
*stub_entry
;
4253 struct elf32_arm_link_hash_entry
*h
= (struct elf32_arm_link_hash_entry
*) hash
;
4254 const asection
*id_sec
;
4256 if ((input_section
->flags
& SEC_CODE
) == 0)
4259 /* If this input section is part of a group of sections sharing one
4260 stub section, then use the id of the first section in the group.
4261 Stub names need to include a section id, as there may well be
4262 more than one stub used to reach say, printf, and we need to
4263 distinguish between them. */
4264 BFD_ASSERT (input_section
->id
<= htab
->top_id
);
4265 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
4267 if (h
!= NULL
&& h
->stub_cache
!= NULL
4268 && h
->stub_cache
->h
== h
4269 && h
->stub_cache
->id_sec
== id_sec
4270 && h
->stub_cache
->stub_type
== stub_type
)
4272 stub_entry
= h
->stub_cache
;
4278 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, h
, rel
, stub_type
);
4279 if (stub_name
== NULL
)
4282 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
,
4283 stub_name
, FALSE
, FALSE
);
4285 h
->stub_cache
= stub_entry
;
4293 /* Whether veneers of type STUB_TYPE require to be in a dedicated output
4297 arm_dedicated_stub_output_section_required (enum elf32_arm_stub_type stub_type
)
4299 if (stub_type
>= max_stub_type
)
4300 abort (); /* Should be unreachable. */
4304 case arm_stub_cmse_branch_thumb_only
:
4311 abort (); /* Should be unreachable. */
4314 /* Required alignment (as a power of 2) for the dedicated section holding
4315 veneers of type STUB_TYPE, or 0 if veneers of this type are interspersed
4316 with input sections. */
4319 arm_dedicated_stub_output_section_required_alignment
4320 (enum elf32_arm_stub_type stub_type
)
4322 if (stub_type
>= max_stub_type
)
4323 abort (); /* Should be unreachable. */
4327 /* Vectors of Secure Gateway veneers must be aligned on 32byte
4329 case arm_stub_cmse_branch_thumb_only
:
4333 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type
));
4337 abort (); /* Should be unreachable. */
4340 /* Name of the dedicated output section to put veneers of type STUB_TYPE, or
4341 NULL if veneers of this type are interspersed with input sections. */
4344 arm_dedicated_stub_output_section_name (enum elf32_arm_stub_type stub_type
)
4346 if (stub_type
>= max_stub_type
)
4347 abort (); /* Should be unreachable. */
4351 case arm_stub_cmse_branch_thumb_only
:
4352 return ".gnu.sgstubs";
4355 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type
));
4359 abort (); /* Should be unreachable. */
4362 /* If veneers of type STUB_TYPE should go in a dedicated output section,
4363 returns the address of the hash table field in HTAB holding a pointer to the
4364 corresponding input section. Otherwise, returns NULL. */
4367 arm_dedicated_stub_input_section_ptr (struct elf32_arm_link_hash_table
*htab
,
4368 enum elf32_arm_stub_type stub_type
)
4370 if (stub_type
>= max_stub_type
)
4371 abort (); /* Should be unreachable. */
4375 case arm_stub_cmse_branch_thumb_only
:
4376 return &htab
->cmse_stub_sec
;
4379 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type
));
4383 abort (); /* Should be unreachable. */
4386 /* Find or create a stub section to contain a stub of type STUB_TYPE. SECTION
4387 is the section that branch into veneer and can be NULL if stub should go in
4388 a dedicated output section. Returns a pointer to the stub section, and the
4389 section to which the stub section will be attached (in *LINK_SEC_P).
4390 LINK_SEC_P may be NULL. */
4393 elf32_arm_create_or_find_stub_sec (asection
**link_sec_p
, asection
*section
,
4394 struct elf32_arm_link_hash_table
*htab
,
4395 enum elf32_arm_stub_type stub_type
)
4397 asection
*link_sec
, *out_sec
, **stub_sec_p
;
4398 const char *stub_sec_prefix
;
4399 bfd_boolean dedicated_output_section
=
4400 arm_dedicated_stub_output_section_required (stub_type
);
4403 if (dedicated_output_section
)
4405 bfd
*output_bfd
= htab
->obfd
;
4406 const char *out_sec_name
=
4407 arm_dedicated_stub_output_section_name (stub_type
);
4409 stub_sec_p
= arm_dedicated_stub_input_section_ptr (htab
, stub_type
);
4410 stub_sec_prefix
= out_sec_name
;
4411 align
= arm_dedicated_stub_output_section_required_alignment (stub_type
);
4412 out_sec
= bfd_get_section_by_name (output_bfd
, out_sec_name
);
4413 if (out_sec
== NULL
)
4415 _bfd_error_handler (_("No address assigned to the veneers output "
4416 "section %s"), out_sec_name
);
4422 BFD_ASSERT (section
->id
<= htab
->top_id
);
4423 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
4424 BFD_ASSERT (link_sec
!= NULL
);
4425 stub_sec_p
= &htab
->stub_group
[section
->id
].stub_sec
;
4426 if (*stub_sec_p
== NULL
)
4427 stub_sec_p
= &htab
->stub_group
[link_sec
->id
].stub_sec
;
4428 stub_sec_prefix
= link_sec
->name
;
4429 out_sec
= link_sec
->output_section
;
4430 align
= htab
->nacl_p
? 4 : 3;
4433 if (*stub_sec_p
== NULL
)
4439 namelen
= strlen (stub_sec_prefix
);
4440 len
= namelen
+ sizeof (STUB_SUFFIX
);
4441 s_name
= (char *) bfd_alloc (htab
->stub_bfd
, len
);
4445 memcpy (s_name
, stub_sec_prefix
, namelen
);
4446 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
4447 *stub_sec_p
= (*htab
->add_stub_section
) (s_name
, out_sec
, link_sec
,
4449 if (*stub_sec_p
== NULL
)
4452 out_sec
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
4453 | SEC_HAS_CONTENTS
| SEC_RELOC
| SEC_IN_MEMORY
4457 if (!dedicated_output_section
)
4458 htab
->stub_group
[section
->id
].stub_sec
= *stub_sec_p
;
4461 *link_sec_p
= link_sec
;
4466 /* Add a new stub entry to the stub hash. Not all fields of the new
4467 stub entry are initialised. */
4469 static struct elf32_arm_stub_hash_entry
*
4470 elf32_arm_add_stub (const char *stub_name
, asection
*section
,
4471 struct elf32_arm_link_hash_table
*htab
,
4472 enum elf32_arm_stub_type stub_type
)
4476 struct elf32_arm_stub_hash_entry
*stub_entry
;
4478 stub_sec
= elf32_arm_create_or_find_stub_sec (&link_sec
, section
, htab
,
4480 if (stub_sec
== NULL
)
4483 /* Enter this entry into the linker stub hash table. */
4484 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
4486 if (stub_entry
== NULL
)
4488 if (section
== NULL
)
4490 _bfd_error_handler (_("%B: cannot create stub entry %s"),
4491 section
->owner
, stub_name
);
4495 stub_entry
->stub_sec
= stub_sec
;
4496 stub_entry
->stub_offset
= (bfd_vma
) -1;
4497 stub_entry
->id_sec
= link_sec
;
4502 /* Store an Arm insn into an output section not processed by
4503 elf32_arm_write_section. */
4506 put_arm_insn (struct elf32_arm_link_hash_table
* htab
,
4507 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
4509 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4510 bfd_putl32 (val
, ptr
);
4512 bfd_putb32 (val
, ptr
);
4515 /* Store a 16-bit Thumb insn into an output section not processed by
4516 elf32_arm_write_section. */
4519 put_thumb_insn (struct elf32_arm_link_hash_table
* htab
,
4520 bfd
* output_bfd
, bfd_vma val
, void * ptr
)
4522 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4523 bfd_putl16 (val
, ptr
);
4525 bfd_putb16 (val
, ptr
);
4528 /* Store a Thumb2 insn into an output section not processed by
4529 elf32_arm_write_section. */
4532 put_thumb2_insn (struct elf32_arm_link_hash_table
* htab
,
4533 bfd
* output_bfd
, bfd_vma val
, bfd_byte
* ptr
)
4535 /* T2 instructions are 16-bit streamed. */
4536 if (htab
->byteswap_code
!= bfd_little_endian (output_bfd
))
4538 bfd_putl16 ((val
>> 16) & 0xffff, ptr
);
4539 bfd_putl16 ((val
& 0xffff), ptr
+ 2);
4543 bfd_putb16 ((val
>> 16) & 0xffff, ptr
);
4544 bfd_putb16 ((val
& 0xffff), ptr
+ 2);
4548 /* If it's possible to change R_TYPE to a more efficient access
4549 model, return the new reloc type. */
4552 elf32_arm_tls_transition (struct bfd_link_info
*info
, int r_type
,
4553 struct elf_link_hash_entry
*h
)
4555 int is_local
= (h
== NULL
);
4557 if (bfd_link_pic (info
)
4558 || (h
&& h
->root
.type
== bfd_link_hash_undefweak
))
4561 /* We do not support relaxations for Old TLS models. */
4564 case R_ARM_TLS_GOTDESC
:
4565 case R_ARM_TLS_CALL
:
4566 case R_ARM_THM_TLS_CALL
:
4567 case R_ARM_TLS_DESCSEQ
:
4568 case R_ARM_THM_TLS_DESCSEQ
:
4569 return is_local
? R_ARM_TLS_LE32
: R_ARM_TLS_IE32
;
4575 static bfd_reloc_status_type elf32_arm_final_link_relocate
4576 (reloc_howto_type
*, bfd
*, bfd
*, asection
*, bfd_byte
*,
4577 Elf_Internal_Rela
*, bfd_vma
, struct bfd_link_info
*, asection
*,
4578 const char *, unsigned char, enum arm_st_branch_type
,
4579 struct elf_link_hash_entry
*, bfd_boolean
*, char **);
4582 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type
)
4586 case arm_stub_a8_veneer_b_cond
:
4587 case arm_stub_a8_veneer_b
:
4588 case arm_stub_a8_veneer_bl
:
4591 case arm_stub_long_branch_any_any
:
4592 case arm_stub_long_branch_v4t_arm_thumb
:
4593 case arm_stub_long_branch_thumb_only
:
4594 case arm_stub_long_branch_thumb2_only
:
4595 case arm_stub_long_branch_thumb2_only_pure
:
4596 case arm_stub_long_branch_v4t_thumb_thumb
:
4597 case arm_stub_long_branch_v4t_thumb_arm
:
4598 case arm_stub_short_branch_v4t_thumb_arm
:
4599 case arm_stub_long_branch_any_arm_pic
:
4600 case arm_stub_long_branch_any_thumb_pic
:
4601 case arm_stub_long_branch_v4t_thumb_thumb_pic
:
4602 case arm_stub_long_branch_v4t_arm_thumb_pic
:
4603 case arm_stub_long_branch_v4t_thumb_arm_pic
:
4604 case arm_stub_long_branch_thumb_only_pic
:
4605 case arm_stub_long_branch_any_tls_pic
:
4606 case arm_stub_long_branch_v4t_thumb_tls_pic
:
4607 case arm_stub_cmse_branch_thumb_only
:
4608 case arm_stub_a8_veneer_blx
:
4611 case arm_stub_long_branch_arm_nacl
:
4612 case arm_stub_long_branch_arm_nacl_pic
:
4616 abort (); /* Should be unreachable. */
4620 /* Returns whether stubs of type STUB_TYPE take over the symbol they are
4621 veneering (TRUE) or have their own symbol (FALSE). */
4624 arm_stub_sym_claimed (enum elf32_arm_stub_type stub_type
)
4626 if (stub_type
>= max_stub_type
)
4627 abort (); /* Should be unreachable. */
4631 case arm_stub_cmse_branch_thumb_only
:
4638 abort (); /* Should be unreachable. */
4641 /* Returns the padding needed for the dedicated section used stubs of type
4645 arm_dedicated_stub_section_padding (enum elf32_arm_stub_type stub_type
)
4647 if (stub_type
>= max_stub_type
)
4648 abort (); /* Should be unreachable. */
4652 case arm_stub_cmse_branch_thumb_only
:
4659 abort (); /* Should be unreachable. */
4662 /* If veneers of type STUB_TYPE should go in a dedicated output section,
4663 returns the address of the hash table field in HTAB holding the offset at
4664 which new veneers should be layed out in the stub section. */
4667 arm_new_stubs_start_offset_ptr (struct elf32_arm_link_hash_table
*htab
,
4668 enum elf32_arm_stub_type stub_type
)
4672 case arm_stub_cmse_branch_thumb_only
:
4673 return &htab
->new_cmse_stub_offset
;
4676 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type
));
4682 arm_build_one_stub (struct bfd_hash_entry
*gen_entry
,
4686 bfd_boolean removed_sg_veneer
;
4687 struct elf32_arm_stub_hash_entry
*stub_entry
;
4688 struct elf32_arm_link_hash_table
*globals
;
4689 struct bfd_link_info
*info
;
4696 const insn_sequence
*template_sequence
;
4698 int stub_reloc_idx
[MAXRELOCS
] = {-1, -1};
4699 int stub_reloc_offset
[MAXRELOCS
] = {0, 0};
4701 int just_allocated
= 0;
4703 /* Massage our args to the form they really have. */
4704 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4705 info
= (struct bfd_link_info
*) in_arg
;
4707 globals
= elf32_arm_hash_table (info
);
4708 if (globals
== NULL
)
4711 stub_sec
= stub_entry
->stub_sec
;
4713 if ((globals
->fix_cortex_a8
< 0)
4714 != (arm_stub_required_alignment (stub_entry
->stub_type
) == 2))
4715 /* We have to do less-strictly-aligned fixes last. */
4718 /* Assign a slot at the end of section if none assigned yet. */
4719 if (stub_entry
->stub_offset
== (bfd_vma
) -1)
4721 stub_entry
->stub_offset
= stub_sec
->size
;
4724 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
4726 stub_bfd
= stub_sec
->owner
;
4728 /* This is the address of the stub destination. */
4729 sym_value
= (stub_entry
->target_value
4730 + stub_entry
->target_section
->output_offset
4731 + stub_entry
->target_section
->output_section
->vma
);
4733 template_sequence
= stub_entry
->stub_template
;
4734 template_size
= stub_entry
->stub_template_size
;
4737 for (i
= 0; i
< template_size
; i
++)
4739 switch (template_sequence
[i
].type
)
4743 bfd_vma data
= (bfd_vma
) template_sequence
[i
].data
;
4744 if (template_sequence
[i
].reloc_addend
!= 0)
4746 /* We've borrowed the reloc_addend field to mean we should
4747 insert a condition code into this (Thumb-1 branch)
4748 instruction. See THUMB16_BCOND_INSN. */
4749 BFD_ASSERT ((data
& 0xff00) == 0xd000);
4750 data
|= ((stub_entry
->orig_insn
>> 22) & 0xf) << 8;
4752 bfd_put_16 (stub_bfd
, data
, loc
+ size
);
4758 bfd_put_16 (stub_bfd
,
4759 (template_sequence
[i
].data
>> 16) & 0xffff,
4761 bfd_put_16 (stub_bfd
, template_sequence
[i
].data
& 0xffff,
4763 if (template_sequence
[i
].r_type
!= R_ARM_NONE
)
4765 stub_reloc_idx
[nrelocs
] = i
;
4766 stub_reloc_offset
[nrelocs
++] = size
;
4772 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
,
4774 /* Handle cases where the target is encoded within the
4776 if (template_sequence
[i
].r_type
== R_ARM_JUMP24
)
4778 stub_reloc_idx
[nrelocs
] = i
;
4779 stub_reloc_offset
[nrelocs
++] = size
;
4785 bfd_put_32 (stub_bfd
, template_sequence
[i
].data
, loc
+ size
);
4786 stub_reloc_idx
[nrelocs
] = i
;
4787 stub_reloc_offset
[nrelocs
++] = size
;
4798 stub_sec
->size
+= size
;
4800 /* Stub size has already been computed in arm_size_one_stub. Check
4802 BFD_ASSERT (size
== stub_entry
->stub_size
);
4804 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4805 if (stub_entry
->branch_type
== ST_BRANCH_TO_THUMB
)
4808 /* Assume non empty slots have at least one and at most MAXRELOCS entries
4809 to relocate in each stub. */
4811 (size
== 0 && stub_entry
->stub_type
== arm_stub_cmse_branch_thumb_only
);
4812 BFD_ASSERT (removed_sg_veneer
|| (nrelocs
!= 0 && nrelocs
<= MAXRELOCS
));
4814 for (i
= 0; i
< nrelocs
; i
++)
4816 Elf_Internal_Rela rel
;
4817 bfd_boolean unresolved_reloc
;
4818 char *error_message
;
4820 sym_value
+ template_sequence
[stub_reloc_idx
[i
]].reloc_addend
;
4822 rel
.r_offset
= stub_entry
->stub_offset
+ stub_reloc_offset
[i
];
4823 rel
.r_info
= ELF32_R_INFO (0,
4824 template_sequence
[stub_reloc_idx
[i
]].r_type
);
4827 if (stub_entry
->stub_type
== arm_stub_a8_veneer_b_cond
&& i
== 0)
4828 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4829 template should refer back to the instruction after the original
4830 branch. We use target_section as Cortex-A8 erratum workaround stubs
4831 are only generated when both source and target are in the same
4833 points_to
= stub_entry
->target_section
->output_section
->vma
4834 + stub_entry
->target_section
->output_offset
4835 + stub_entry
->source_value
;
4837 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4838 (template_sequence
[stub_reloc_idx
[i
]].r_type
),
4839 stub_bfd
, info
->output_bfd
, stub_sec
, stub_sec
->contents
, &rel
,
4840 points_to
, info
, stub_entry
->target_section
, "", STT_FUNC
,
4841 stub_entry
->branch_type
,
4842 (struct elf_link_hash_entry
*) stub_entry
->h
, &unresolved_reloc
,
4850 /* Calculate the template, template size and instruction size for a stub.
4851 Return value is the instruction size. */
4854 find_stub_size_and_template (enum elf32_arm_stub_type stub_type
,
4855 const insn_sequence
**stub_template
,
4856 int *stub_template_size
)
4858 const insn_sequence
*template_sequence
= NULL
;
4859 int template_size
= 0, i
;
4862 template_sequence
= stub_definitions
[stub_type
].template_sequence
;
4864 *stub_template
= template_sequence
;
4866 template_size
= stub_definitions
[stub_type
].template_size
;
4867 if (stub_template_size
)
4868 *stub_template_size
= template_size
;
4871 for (i
= 0; i
< template_size
; i
++)
4873 switch (template_sequence
[i
].type
)
4894 /* As above, but don't actually build the stub. Just bump offset so
4895 we know stub section sizes. */
4898 arm_size_one_stub (struct bfd_hash_entry
*gen_entry
,
4899 void *in_arg ATTRIBUTE_UNUSED
)
4901 struct elf32_arm_stub_hash_entry
*stub_entry
;
4902 const insn_sequence
*template_sequence
;
4903 int template_size
, size
;
4905 /* Massage our args to the form they really have. */
4906 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
4908 BFD_ASSERT((stub_entry
->stub_type
> arm_stub_none
)
4909 && stub_entry
->stub_type
< ARRAY_SIZE(stub_definitions
));
4911 size
= find_stub_size_and_template (stub_entry
->stub_type
, &template_sequence
,
4914 /* Initialized to -1. Null size indicates an empty slot full of zeros. */
4915 if (stub_entry
->stub_template_size
)
4917 stub_entry
->stub_size
= size
;
4918 stub_entry
->stub_template
= template_sequence
;
4919 stub_entry
->stub_template_size
= template_size
;
4922 /* Already accounted for. */
4923 if (stub_entry
->stub_offset
!= (bfd_vma
) -1)
4926 size
= (size
+ 7) & ~7;
4927 stub_entry
->stub_sec
->size
+= size
;
4932 /* External entry points for sizing and building linker stubs. */
4934 /* Set up various things so that we can make a list of input sections
4935 for each output section included in the link. Returns -1 on error,
4936 0 when no stubs will be needed, and 1 on success. */
4939 elf32_arm_setup_section_lists (bfd
*output_bfd
,
4940 struct bfd_link_info
*info
)
4943 unsigned int bfd_count
;
4944 unsigned int top_id
, top_index
;
4946 asection
**input_list
, **list
;
4948 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
4952 if (! is_elf_hash_table (htab
))
4955 /* Count the number of input BFDs and find the top input section id. */
4956 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
4958 input_bfd
= input_bfd
->link
.next
)
4961 for (section
= input_bfd
->sections
;
4963 section
= section
->next
)
4965 if (top_id
< section
->id
)
4966 top_id
= section
->id
;
4969 htab
->bfd_count
= bfd_count
;
4971 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
4972 htab
->stub_group
= (struct map_stub
*) bfd_zmalloc (amt
);
4973 if (htab
->stub_group
== NULL
)
4975 htab
->top_id
= top_id
;
4977 /* We can't use output_bfd->section_count here to find the top output
4978 section index as some sections may have been removed, and
4979 _bfd_strip_section_from_output doesn't renumber the indices. */
4980 for (section
= output_bfd
->sections
, top_index
= 0;
4982 section
= section
->next
)
4984 if (top_index
< section
->index
)
4985 top_index
= section
->index
;
4988 htab
->top_index
= top_index
;
4989 amt
= sizeof (asection
*) * (top_index
+ 1);
4990 input_list
= (asection
**) bfd_malloc (amt
);
4991 htab
->input_list
= input_list
;
4992 if (input_list
== NULL
)
4995 /* For sections we aren't interested in, mark their entries with a
4996 value we can check later. */
4997 list
= input_list
+ top_index
;
4999 *list
= bfd_abs_section_ptr
;
5000 while (list
-- != input_list
);
5002 for (section
= output_bfd
->sections
;
5004 section
= section
->next
)
5006 if ((section
->flags
& SEC_CODE
) != 0)
5007 input_list
[section
->index
] = NULL
;
5013 /* The linker repeatedly calls this function for each input section,
5014 in the order that input sections are linked into output sections.
5015 Build lists of input sections to determine groupings between which
5016 we may insert linker stubs. */
5019 elf32_arm_next_input_section (struct bfd_link_info
*info
,
5022 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
5027 if (isec
->output_section
->index
<= htab
->top_index
)
5029 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
5031 if (*list
!= bfd_abs_section_ptr
&& (isec
->flags
& SEC_CODE
) != 0)
5033 /* Steal the link_sec pointer for our list. */
5034 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
5035 /* This happens to make the list in reverse order,
5036 which we reverse later. */
5037 PREV_SEC (isec
) = *list
;
5043 /* See whether we can group stub sections together. Grouping stub
5044 sections may result in fewer stubs. More importantly, we need to
5045 put all .init* and .fini* stubs at the end of the .init or
5046 .fini output sections respectively, because glibc splits the
5047 _init and _fini functions into multiple parts. Putting a stub in
5048 the middle of a function is not a good idea. */
5051 group_sections (struct elf32_arm_link_hash_table
*htab
,
5052 bfd_size_type stub_group_size
,
5053 bfd_boolean stubs_always_after_branch
)
5055 asection
**list
= htab
->input_list
;
5059 asection
*tail
= *list
;
5062 if (tail
== bfd_abs_section_ptr
)
5065 /* Reverse the list: we must avoid placing stubs at the
5066 beginning of the section because the beginning of the text
5067 section may be required for an interrupt vector in bare metal
5069 #define NEXT_SEC PREV_SEC
5071 while (tail
!= NULL
)
5073 /* Pop from tail. */
5074 asection
*item
= tail
;
5075 tail
= PREV_SEC (item
);
5078 NEXT_SEC (item
) = head
;
5082 while (head
!= NULL
)
5086 bfd_vma stub_group_start
= head
->output_offset
;
5087 bfd_vma end_of_next
;
5090 while (NEXT_SEC (curr
) != NULL
)
5092 next
= NEXT_SEC (curr
);
5093 end_of_next
= next
->output_offset
+ next
->size
;
5094 if (end_of_next
- stub_group_start
>= stub_group_size
)
5095 /* End of NEXT is too far from start, so stop. */
5097 /* Add NEXT to the group. */
5101 /* OK, the size from the start to the start of CURR is less
5102 than stub_group_size and thus can be handled by one stub
5103 section. (Or the head section is itself larger than
5104 stub_group_size, in which case we may be toast.)
5105 We should really be keeping track of the total size of
5106 stubs added here, as stubs contribute to the final output
5110 next
= NEXT_SEC (head
);
5111 /* Set up this stub group. */
5112 htab
->stub_group
[head
->id
].link_sec
= curr
;
5114 while (head
!= curr
&& (head
= next
) != NULL
);
5116 /* But wait, there's more! Input sections up to stub_group_size
5117 bytes after the stub section can be handled by it too. */
5118 if (!stubs_always_after_branch
)
5120 stub_group_start
= curr
->output_offset
+ curr
->size
;
5122 while (next
!= NULL
)
5124 end_of_next
= next
->output_offset
+ next
->size
;
5125 if (end_of_next
- stub_group_start
>= stub_group_size
)
5126 /* End of NEXT is too far from stubs, so stop. */
5128 /* Add NEXT to the stub group. */
5130 next
= NEXT_SEC (head
);
5131 htab
->stub_group
[head
->id
].link_sec
= curr
;
5137 while (list
++ != htab
->input_list
+ htab
->top_index
);
5139 free (htab
->input_list
);
5144 /* Comparison function for sorting/searching relocations relating to Cortex-A8
5148 a8_reloc_compare (const void *a
, const void *b
)
5150 const struct a8_erratum_reloc
*ra
= (const struct a8_erratum_reloc
*) a
;
5151 const struct a8_erratum_reloc
*rb
= (const struct a8_erratum_reloc
*) b
;
5153 if (ra
->from
< rb
->from
)
5155 else if (ra
->from
> rb
->from
)
5161 static struct elf_link_hash_entry
*find_thumb_glue (struct bfd_link_info
*,
5162 const char *, char **);
5164 /* Helper function to scan code for sequences which might trigger the Cortex-A8
5165 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
5166 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
5170 cortex_a8_erratum_scan (bfd
*input_bfd
,
5171 struct bfd_link_info
*info
,
5172 struct a8_erratum_fix
**a8_fixes_p
,
5173 unsigned int *num_a8_fixes_p
,
5174 unsigned int *a8_fix_table_size_p
,
5175 struct a8_erratum_reloc
*a8_relocs
,
5176 unsigned int num_a8_relocs
,
5177 unsigned prev_num_a8_fixes
,
5178 bfd_boolean
*stub_changed_p
)
5181 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
5182 struct a8_erratum_fix
*a8_fixes
= *a8_fixes_p
;
5183 unsigned int num_a8_fixes
= *num_a8_fixes_p
;
5184 unsigned int a8_fix_table_size
= *a8_fix_table_size_p
;
5189 for (section
= input_bfd
->sections
;
5191 section
= section
->next
)
5193 bfd_byte
*contents
= NULL
;
5194 struct _arm_elf_section_data
*sec_data
;
5198 if (elf_section_type (section
) != SHT_PROGBITS
5199 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
5200 || (section
->flags
& SEC_EXCLUDE
) != 0
5201 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
5202 || (section
->output_section
== bfd_abs_section_ptr
))
5205 base_vma
= section
->output_section
->vma
+ section
->output_offset
;
5207 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
5208 contents
= elf_section_data (section
)->this_hdr
.contents
;
5209 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
5212 sec_data
= elf32_arm_section_data (section
);
5214 for (span
= 0; span
< sec_data
->mapcount
; span
++)
5216 unsigned int span_start
= sec_data
->map
[span
].vma
;
5217 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
5218 ? section
->size
: sec_data
->map
[span
+ 1].vma
;
5220 char span_type
= sec_data
->map
[span
].type
;
5221 bfd_boolean last_was_32bit
= FALSE
, last_was_branch
= FALSE
;
5223 if (span_type
!= 't')
5226 /* Span is entirely within a single 4KB region: skip scanning. */
5227 if (((base_vma
+ span_start
) & ~0xfff)
5228 == ((base_vma
+ span_end
) & ~0xfff))
5231 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
5233 * The opcode is BLX.W, BL.W, B.W, Bcc.W
5234 * The branch target is in the same 4KB region as the
5235 first half of the branch.
5236 * The instruction before the branch is a 32-bit
5237 length non-branch instruction. */
5238 for (i
= span_start
; i
< span_end
;)
5240 unsigned int insn
= bfd_getl16 (&contents
[i
]);
5241 bfd_boolean insn_32bit
= FALSE
, is_blx
= FALSE
, is_b
= FALSE
;
5242 bfd_boolean is_bl
= FALSE
, is_bcc
= FALSE
, is_32bit_branch
;
5244 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
5249 /* Load the rest of the insn (in manual-friendly order). */
5250 insn
= (insn
<< 16) | bfd_getl16 (&contents
[i
+ 2]);
5252 /* Encoding T4: B<c>.W. */
5253 is_b
= (insn
& 0xf800d000) == 0xf0009000;
5254 /* Encoding T1: BL<c>.W. */
5255 is_bl
= (insn
& 0xf800d000) == 0xf000d000;
5256 /* Encoding T2: BLX<c>.W. */
5257 is_blx
= (insn
& 0xf800d000) == 0xf000c000;
5258 /* Encoding T3: B<c>.W (not permitted in IT block). */
5259 is_bcc
= (insn
& 0xf800d000) == 0xf0008000
5260 && (insn
& 0x07f00000) != 0x03800000;
5263 is_32bit_branch
= is_b
|| is_bl
|| is_blx
|| is_bcc
;
5265 if (((base_vma
+ i
) & 0xfff) == 0xffe
5269 && ! last_was_branch
)
5271 bfd_signed_vma offset
= 0;
5272 bfd_boolean force_target_arm
= FALSE
;
5273 bfd_boolean force_target_thumb
= FALSE
;
5275 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
5276 struct a8_erratum_reloc key
, *found
;
5277 bfd_boolean use_plt
= FALSE
;
5279 key
.from
= base_vma
+ i
;
5280 found
= (struct a8_erratum_reloc
*)
5281 bsearch (&key
, a8_relocs
, num_a8_relocs
,
5282 sizeof (struct a8_erratum_reloc
),
5287 char *error_message
= NULL
;
5288 struct elf_link_hash_entry
*entry
;
5290 /* We don't care about the error returned from this
5291 function, only if there is glue or not. */
5292 entry
= find_thumb_glue (info
, found
->sym_name
,
5296 found
->non_a8_stub
= TRUE
;
5298 /* Keep a simpler condition, for the sake of clarity. */
5299 if (htab
->root
.splt
!= NULL
&& found
->hash
!= NULL
5300 && found
->hash
->root
.plt
.offset
!= (bfd_vma
) -1)
5303 if (found
->r_type
== R_ARM_THM_CALL
)
5305 if (found
->branch_type
== ST_BRANCH_TO_ARM
5307 force_target_arm
= TRUE
;
5309 force_target_thumb
= TRUE
;
5313 /* Check if we have an offending branch instruction. */
5315 if (found
&& found
->non_a8_stub
)
5316 /* We've already made a stub for this instruction, e.g.
5317 it's a long branch or a Thumb->ARM stub. Assume that
5318 stub will suffice to work around the A8 erratum (see
5319 setting of always_after_branch above). */
5323 offset
= (insn
& 0x7ff) << 1;
5324 offset
|= (insn
& 0x3f0000) >> 4;
5325 offset
|= (insn
& 0x2000) ? 0x40000 : 0;
5326 offset
|= (insn
& 0x800) ? 0x80000 : 0;
5327 offset
|= (insn
& 0x4000000) ? 0x100000 : 0;
5328 if (offset
& 0x100000)
5329 offset
|= ~ ((bfd_signed_vma
) 0xfffff);
5330 stub_type
= arm_stub_a8_veneer_b_cond
;
5332 else if (is_b
|| is_bl
|| is_blx
)
5334 int s
= (insn
& 0x4000000) != 0;
5335 int j1
= (insn
& 0x2000) != 0;
5336 int j2
= (insn
& 0x800) != 0;
5340 offset
= (insn
& 0x7ff) << 1;
5341 offset
|= (insn
& 0x3ff0000) >> 4;
5345 if (offset
& 0x1000000)
5346 offset
|= ~ ((bfd_signed_vma
) 0xffffff);
5349 offset
&= ~ ((bfd_signed_vma
) 3);
5351 stub_type
= is_blx
? arm_stub_a8_veneer_blx
:
5352 is_bl
? arm_stub_a8_veneer_bl
: arm_stub_a8_veneer_b
;
5355 if (stub_type
!= arm_stub_none
)
5357 bfd_vma pc_for_insn
= base_vma
+ i
+ 4;
5359 /* The original instruction is a BL, but the target is
5360 an ARM instruction. If we were not making a stub,
5361 the BL would have been converted to a BLX. Use the
5362 BLX stub instead in that case. */
5363 if (htab
->use_blx
&& force_target_arm
5364 && stub_type
== arm_stub_a8_veneer_bl
)
5366 stub_type
= arm_stub_a8_veneer_blx
;
5370 /* Conversely, if the original instruction was
5371 BLX but the target is Thumb mode, use the BL
5373 else if (force_target_thumb
5374 && stub_type
== arm_stub_a8_veneer_blx
)
5376 stub_type
= arm_stub_a8_veneer_bl
;
5382 pc_for_insn
&= ~ ((bfd_vma
) 3);
5384 /* If we found a relocation, use the proper destination,
5385 not the offset in the (unrelocated) instruction.
5386 Note this is always done if we switched the stub type
5390 (bfd_signed_vma
) (found
->destination
- pc_for_insn
);
5392 /* If the stub will use a Thumb-mode branch to a
5393 PLT target, redirect it to the preceding Thumb
5395 if (stub_type
!= arm_stub_a8_veneer_blx
&& use_plt
)
5396 offset
-= PLT_THUMB_STUB_SIZE
;
5398 target
= pc_for_insn
+ offset
;
5400 /* The BLX stub is ARM-mode code. Adjust the offset to
5401 take the different PC value (+8 instead of +4) into
5403 if (stub_type
== arm_stub_a8_veneer_blx
)
5406 if (((base_vma
+ i
) & ~0xfff) == (target
& ~0xfff))
5408 char *stub_name
= NULL
;
5410 if (num_a8_fixes
== a8_fix_table_size
)
5412 a8_fix_table_size
*= 2;
5413 a8_fixes
= (struct a8_erratum_fix
*)
5414 bfd_realloc (a8_fixes
,
5415 sizeof (struct a8_erratum_fix
)
5416 * a8_fix_table_size
);
5419 if (num_a8_fixes
< prev_num_a8_fixes
)
5421 /* If we're doing a subsequent scan,
5422 check if we've found the same fix as
5423 before, and try and reuse the stub
5425 stub_name
= a8_fixes
[num_a8_fixes
].stub_name
;
5426 if ((a8_fixes
[num_a8_fixes
].section
!= section
)
5427 || (a8_fixes
[num_a8_fixes
].offset
!= i
))
5431 *stub_changed_p
= TRUE
;
5437 stub_name
= (char *) bfd_malloc (8 + 1 + 8 + 1);
5438 if (stub_name
!= NULL
)
5439 sprintf (stub_name
, "%x:%x", section
->id
, i
);
5442 a8_fixes
[num_a8_fixes
].input_bfd
= input_bfd
;
5443 a8_fixes
[num_a8_fixes
].section
= section
;
5444 a8_fixes
[num_a8_fixes
].offset
= i
;
5445 a8_fixes
[num_a8_fixes
].target_offset
=
5447 a8_fixes
[num_a8_fixes
].orig_insn
= insn
;
5448 a8_fixes
[num_a8_fixes
].stub_name
= stub_name
;
5449 a8_fixes
[num_a8_fixes
].stub_type
= stub_type
;
5450 a8_fixes
[num_a8_fixes
].branch_type
=
5451 is_blx
? ST_BRANCH_TO_ARM
: ST_BRANCH_TO_THUMB
;
5458 i
+= insn_32bit
? 4 : 2;
5459 last_was_32bit
= insn_32bit
;
5460 last_was_branch
= is_32bit_branch
;
5464 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
5468 *a8_fixes_p
= a8_fixes
;
5469 *num_a8_fixes_p
= num_a8_fixes
;
5470 *a8_fix_table_size_p
= a8_fix_table_size
;
5475 /* Create or update a stub entry depending on whether the stub can already be
5476 found in HTAB. The stub is identified by:
5477 - its type STUB_TYPE
5478 - its source branch (note that several can share the same stub) whose
5479 section and relocation (if any) are given by SECTION and IRELA
5481 - its target symbol whose input section, hash, name, value and branch type
5482 are given in SYM_SEC, HASH, SYM_NAME, SYM_VALUE and BRANCH_TYPE
5485 If found, the value of the stub's target symbol is updated from SYM_VALUE
5486 and *NEW_STUB is set to FALSE. Otherwise, *NEW_STUB is set to
5487 TRUE and the stub entry is initialized.
5489 Returns the stub that was created or updated, or NULL if an error
5492 static struct elf32_arm_stub_hash_entry
*
5493 elf32_arm_create_stub (struct elf32_arm_link_hash_table
*htab
,
5494 enum elf32_arm_stub_type stub_type
, asection
*section
,
5495 Elf_Internal_Rela
*irela
, asection
*sym_sec
,
5496 struct elf32_arm_link_hash_entry
*hash
, char *sym_name
,
5497 bfd_vma sym_value
, enum arm_st_branch_type branch_type
,
5498 bfd_boolean
*new_stub
)
5500 const asection
*id_sec
;
5502 struct elf32_arm_stub_hash_entry
*stub_entry
;
5503 unsigned int r_type
;
5504 bfd_boolean sym_claimed
= arm_stub_sym_claimed (stub_type
);
5506 BFD_ASSERT (stub_type
!= arm_stub_none
);
5510 stub_name
= sym_name
;
5514 BFD_ASSERT (section
);
5515 BFD_ASSERT (section
->id
<= htab
->top_id
);
5517 /* Support for grouping stub sections. */
5518 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
5520 /* Get the name of this stub. */
5521 stub_name
= elf32_arm_stub_name (id_sec
, sym_sec
, hash
, irela
,
5527 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
, FALSE
,
5529 /* The proper stub has already been created, just update its value. */
5530 if (stub_entry
!= NULL
)
5534 stub_entry
->target_value
= sym_value
;
5538 stub_entry
= elf32_arm_add_stub (stub_name
, section
, htab
, stub_type
);
5539 if (stub_entry
== NULL
)
5546 stub_entry
->target_value
= sym_value
;
5547 stub_entry
->target_section
= sym_sec
;
5548 stub_entry
->stub_type
= stub_type
;
5549 stub_entry
->h
= hash
;
5550 stub_entry
->branch_type
= branch_type
;
5553 stub_entry
->output_name
= sym_name
;
5556 if (sym_name
== NULL
)
5557 sym_name
= "unnamed";
5558 stub_entry
->output_name
= (char *)
5559 bfd_alloc (htab
->stub_bfd
, sizeof (THUMB2ARM_GLUE_ENTRY_NAME
)
5560 + strlen (sym_name
));
5561 if (stub_entry
->output_name
== NULL
)
5567 /* For historical reasons, use the existing names for ARM-to-Thumb and
5568 Thumb-to-ARM stubs. */
5569 r_type
= ELF32_R_TYPE (irela
->r_info
);
5570 if ((r_type
== (unsigned int) R_ARM_THM_CALL
5571 || r_type
== (unsigned int) R_ARM_THM_JUMP24
5572 || r_type
== (unsigned int) R_ARM_THM_JUMP19
)
5573 && branch_type
== ST_BRANCH_TO_ARM
)
5574 sprintf (stub_entry
->output_name
, THUMB2ARM_GLUE_ENTRY_NAME
, sym_name
);
5575 else if ((r_type
== (unsigned int) R_ARM_CALL
5576 || r_type
== (unsigned int) R_ARM_JUMP24
)
5577 && branch_type
== ST_BRANCH_TO_THUMB
)
5578 sprintf (stub_entry
->output_name
, ARM2THUMB_GLUE_ENTRY_NAME
, sym_name
);
5580 sprintf (stub_entry
->output_name
, STUB_ENTRY_NAME
, sym_name
);
5587 /* Scan symbols in INPUT_BFD to identify secure entry functions needing a
5588 gateway veneer to transition from non secure to secure state and create them
5591 "ARMv8-M Security Extensions: Requirements on Development Tools" document
5592 defines the conditions that govern Secure Gateway veneer creation for a
5593 given symbol <SYM> as follows:
5594 - it has function type
5595 - it has non local binding
5596 - a symbol named __acle_se_<SYM> (called special symbol) exists with the
5597 same type, binding and value as <SYM> (called normal symbol).
5598 An entry function can handle secure state transition itself in which case
5599 its special symbol would have a different value from the normal symbol.
5601 OUT_ATTR gives the output attributes, SYM_HASHES the symbol index to hash
5602 entry mapping while HTAB gives the name to hash entry mapping.
5603 *CMSE_STUB_CREATED is increased by the number of secure gateway veneer
5606 The return value gives whether a stub failed to be allocated. */
5609 cmse_scan (bfd
*input_bfd
, struct elf32_arm_link_hash_table
*htab
,
5610 obj_attribute
*out_attr
, struct elf_link_hash_entry
**sym_hashes
,
5611 int *cmse_stub_created
)
5613 const struct elf_backend_data
*bed
;
5614 Elf_Internal_Shdr
*symtab_hdr
;
5615 unsigned i
, j
, sym_count
, ext_start
;
5616 Elf_Internal_Sym
*cmse_sym
, *local_syms
;
5617 struct elf32_arm_link_hash_entry
*hash
, *cmse_hash
= NULL
;
5618 enum arm_st_branch_type branch_type
;
5619 char *sym_name
, *lsym_name
;
5622 struct elf32_arm_stub_hash_entry
*stub_entry
;
5623 bfd_boolean is_v8m
, new_stub
, cmse_invalid
, ret
= TRUE
;
5625 bed
= get_elf_backend_data (input_bfd
);
5626 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
5627 sym_count
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
5628 ext_start
= symtab_hdr
->sh_info
;
5629 is_v8m
= (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V8M_BASE
5630 && out_attr
[Tag_CPU_arch_profile
].i
== 'M');
5632 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5633 if (local_syms
== NULL
)
5634 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
5635 symtab_hdr
->sh_info
, 0, NULL
, NULL
,
5637 if (symtab_hdr
->sh_info
&& local_syms
== NULL
)
5641 for (i
= 0; i
< sym_count
; i
++)
5643 cmse_invalid
= FALSE
;
5647 cmse_sym
= &local_syms
[i
];
5648 /* Not a special symbol. */
5649 if (!ARM_GET_SYM_CMSE_SPCL (cmse_sym
->st_target_internal
))
5651 sym_name
= bfd_elf_string_from_elf_section (input_bfd
,
5652 symtab_hdr
->sh_link
,
5654 /* Special symbol with local binding. */
5655 cmse_invalid
= TRUE
;
5659 cmse_hash
= elf32_arm_hash_entry (sym_hashes
[i
- ext_start
]);
5660 sym_name
= (char *) cmse_hash
->root
.root
.root
.string
;
5662 /* Not a special symbol. */
5663 if (!ARM_GET_SYM_CMSE_SPCL (cmse_hash
->root
.target_internal
))
5666 /* Special symbol has incorrect binding or type. */
5667 if ((cmse_hash
->root
.root
.type
!= bfd_link_hash_defined
5668 && cmse_hash
->root
.root
.type
!= bfd_link_hash_defweak
)
5669 || cmse_hash
->root
.type
!= STT_FUNC
)
5670 cmse_invalid
= TRUE
;
5675 _bfd_error_handler (_("%B: Special symbol `%s' only allowed for "
5676 "ARMv8-M architecture or later."),
5677 input_bfd
, sym_name
);
5678 is_v8m
= TRUE
; /* Avoid multiple warning. */
5684 _bfd_error_handler (_("%B: invalid special symbol `%s'."),
5685 input_bfd
, sym_name
);
5686 _bfd_error_handler (_("It must be a global or weak function "
5693 sym_name
+= strlen (CMSE_PREFIX
);
5694 hash
= (struct elf32_arm_link_hash_entry
*)
5695 elf_link_hash_lookup (&(htab
)->root
, sym_name
, FALSE
, FALSE
, TRUE
);
5697 /* No associated normal symbol or it is neither global nor weak. */
5699 || (hash
->root
.root
.type
!= bfd_link_hash_defined
5700 && hash
->root
.root
.type
!= bfd_link_hash_defweak
)
5701 || hash
->root
.type
!= STT_FUNC
)
5703 /* Initialize here to avoid warning about use of possibly
5704 uninitialized variable. */
5709 /* Searching for a normal symbol with local binding. */
5710 for (; j
< ext_start
; j
++)
5713 bfd_elf_string_from_elf_section (input_bfd
,
5714 symtab_hdr
->sh_link
,
5715 local_syms
[j
].st_name
);
5716 if (!strcmp (sym_name
, lsym_name
))
5721 if (hash
|| j
< ext_start
)
5724 (_("%B: invalid standard symbol `%s'."), input_bfd
, sym_name
);
5726 (_("It must be a global or weak function symbol."));
5730 (_("%B: absent standard symbol `%s'."), input_bfd
, sym_name
);
5736 sym_value
= hash
->root
.root
.u
.def
.value
;
5737 section
= hash
->root
.root
.u
.def
.section
;
5739 if (cmse_hash
->root
.root
.u
.def
.section
!= section
)
5742 (_("%B: `%s' and its special symbol are in different sections."),
5743 input_bfd
, sym_name
);
5746 if (cmse_hash
->root
.root
.u
.def
.value
!= sym_value
)
5747 continue; /* Ignore: could be an entry function starting with SG. */
5749 /* If this section is a link-once section that will be discarded, then
5750 don't create any stubs. */
5751 if (section
->output_section
== NULL
)
5754 (_("%B: entry function `%s' not output."), input_bfd
, sym_name
);
5758 if (hash
->root
.size
== 0)
5761 (_("%B: entry function `%s' is empty."), input_bfd
, sym_name
);
5767 branch_type
= ARM_GET_SYM_BRANCH_TYPE (hash
->root
.target_internal
);
5769 = elf32_arm_create_stub (htab
, arm_stub_cmse_branch_thumb_only
,
5770 NULL
, NULL
, section
, hash
, sym_name
,
5771 sym_value
, branch_type
, &new_stub
);
5773 if (stub_entry
== NULL
)
5777 BFD_ASSERT (new_stub
);
5778 (*cmse_stub_created
)++;
5782 if (!symtab_hdr
->contents
)
5787 /* Return TRUE iff a symbol identified by its linker HASH entry is a secure
5788 code entry function, ie can be called from non secure code without using a
5792 cmse_entry_fct_p (struct elf32_arm_link_hash_entry
*hash
)
5794 bfd_byte contents
[4];
5795 uint32_t first_insn
;
5800 /* Defined symbol of function type. */
5801 if (hash
->root
.root
.type
!= bfd_link_hash_defined
5802 && hash
->root
.root
.type
!= bfd_link_hash_defweak
)
5804 if (hash
->root
.type
!= STT_FUNC
)
5807 /* Read first instruction. */
5808 section
= hash
->root
.root
.u
.def
.section
;
5809 abfd
= section
->owner
;
5810 offset
= hash
->root
.root
.u
.def
.value
- section
->vma
;
5811 if (!bfd_get_section_contents (abfd
, section
, contents
, offset
,
5815 first_insn
= bfd_get_32 (abfd
, contents
);
5817 /* Starts by SG instruction. */
5818 return first_insn
== 0xe97fe97f;
5821 /* Output the name (in symbol table) of the veneer GEN_ENTRY if it is a new
5822 secure gateway veneers (ie. the veneers was not in the input import library)
5823 and there is no output import library (GEN_INFO->out_implib_bfd is NULL. */
5826 arm_list_new_cmse_stub (struct bfd_hash_entry
*gen_entry
, void *gen_info
)
5828 struct elf32_arm_stub_hash_entry
*stub_entry
;
5829 struct bfd_link_info
*info
;
5831 /* Massage our args to the form they really have. */
5832 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
5833 info
= (struct bfd_link_info
*) gen_info
;
5835 if (info
->out_implib_bfd
)
5838 if (stub_entry
->stub_type
!= arm_stub_cmse_branch_thumb_only
)
5841 if (stub_entry
->stub_offset
== (bfd_vma
) -1)
5842 _bfd_error_handler (" %s", stub_entry
->output_name
);
5847 /* Set offset of each secure gateway veneers so that its address remain
5848 identical to the one in the input import library referred by
5849 HTAB->in_implib_bfd. A warning is issued for veneers that disappeared
5850 (present in input import library but absent from the executable being
5851 linked) or if new veneers appeared and there is no output import library
5852 (INFO->out_implib_bfd is NULL and *CMSE_STUB_CREATED is bigger than the
5853 number of secure gateway veneers found in the input import library.
5855 The function returns whether an error occurred. If no error occurred,
5856 *CMSE_STUB_CREATED gives the number of SG veneers created by both cmse_scan
5857 and this function and HTAB->new_cmse_stub_offset is set to the biggest
5858 veneer observed set for new veneers to be layed out after. */
5861 set_cmse_veneer_addr_from_implib (struct bfd_link_info
*info
,
5862 struct elf32_arm_link_hash_table
*htab
,
5863 int *cmse_stub_created
)
5870 asection
*stub_out_sec
;
5871 bfd_boolean ret
= TRUE
;
5872 Elf_Internal_Sym
*intsym
;
5873 const char *out_sec_name
;
5874 bfd_size_type cmse_stub_size
;
5875 asymbol
**sympp
= NULL
, *sym
;
5876 struct elf32_arm_link_hash_entry
*hash
;
5877 const insn_sequence
*cmse_stub_template
;
5878 struct elf32_arm_stub_hash_entry
*stub_entry
;
5879 int cmse_stub_template_size
, new_cmse_stubs_created
= *cmse_stub_created
;
5880 bfd_vma veneer_value
, stub_offset
, next_cmse_stub_offset
;
5881 bfd_vma cmse_stub_array_start
= (bfd_vma
) -1, cmse_stub_sec_vma
= 0;
5883 /* No input secure gateway import library. */
5884 if (!htab
->in_implib_bfd
)
5887 in_implib_bfd
= htab
->in_implib_bfd
;
5888 if (!htab
->cmse_implib
)
5890 _bfd_error_handler (_("%B: --in-implib only supported for Secure "
5891 "Gateway import libraries."), in_implib_bfd
);
5895 /* Get symbol table size. */
5896 symsize
= bfd_get_symtab_upper_bound (in_implib_bfd
);
5900 /* Read in the input secure gateway import library's symbol table. */
5901 sympp
= (asymbol
**) xmalloc (symsize
);
5902 symcount
= bfd_canonicalize_symtab (in_implib_bfd
, sympp
);
5909 htab
->new_cmse_stub_offset
= 0;
5911 find_stub_size_and_template (arm_stub_cmse_branch_thumb_only
,
5912 &cmse_stub_template
,
5913 &cmse_stub_template_size
);
5915 arm_dedicated_stub_output_section_name (arm_stub_cmse_branch_thumb_only
);
5917 bfd_get_section_by_name (htab
->obfd
, out_sec_name
);
5918 if (stub_out_sec
!= NULL
)
5919 cmse_stub_sec_vma
= stub_out_sec
->vma
;
5921 /* Set addresses of veneers mentionned in input secure gateway import
5922 library's symbol table. */
5923 for (i
= 0; i
< symcount
; i
++)
5927 sym_name
= (char *) bfd_asymbol_name (sym
);
5928 intsym
= &((elf_symbol_type
*) sym
)->internal_elf_sym
;
5930 if (sym
->section
!= bfd_abs_section_ptr
5931 || !(flags
& (BSF_GLOBAL
| BSF_WEAK
))
5932 || (flags
& BSF_FUNCTION
) != BSF_FUNCTION
5933 || (ARM_GET_SYM_BRANCH_TYPE (intsym
->st_target_internal
)
5934 != ST_BRANCH_TO_THUMB
))
5936 _bfd_error_handler (_("%B: invalid import library entry: `%s'."),
5937 in_implib_bfd
, sym_name
);
5938 _bfd_error_handler (_("Symbol should be absolute, global and "
5939 "refer to Thumb functions."));
5944 veneer_value
= bfd_asymbol_value (sym
);
5945 stub_offset
= veneer_value
- cmse_stub_sec_vma
;
5946 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, sym_name
,
5948 hash
= (struct elf32_arm_link_hash_entry
*)
5949 elf_link_hash_lookup (&(htab
)->root
, sym_name
, FALSE
, FALSE
, TRUE
);
5951 /* Stub entry should have been created by cmse_scan or the symbol be of
5952 a secure function callable from non secure code. */
5953 if (!stub_entry
&& !hash
)
5955 bfd_boolean new_stub
;
5958 (_("Entry function `%s' disappeared from secure code."), sym_name
);
5959 hash
= (struct elf32_arm_link_hash_entry
*)
5960 elf_link_hash_lookup (&(htab
)->root
, sym_name
, TRUE
, TRUE
, TRUE
);
5962 = elf32_arm_create_stub (htab
, arm_stub_cmse_branch_thumb_only
,
5963 NULL
, NULL
, bfd_abs_section_ptr
, hash
,
5964 sym_name
, veneer_value
,
5965 ST_BRANCH_TO_THUMB
, &new_stub
);
5966 if (stub_entry
== NULL
)
5970 BFD_ASSERT (new_stub
);
5971 new_cmse_stubs_created
++;
5972 (*cmse_stub_created
)++;
5974 stub_entry
->stub_template_size
= stub_entry
->stub_size
= 0;
5975 stub_entry
->stub_offset
= stub_offset
;
5977 /* Symbol found is not callable from non secure code. */
5978 else if (!stub_entry
)
5980 if (!cmse_entry_fct_p (hash
))
5982 _bfd_error_handler (_("`%s' refers to a non entry function."),
5990 /* Only stubs for SG veneers should have been created. */
5991 BFD_ASSERT (stub_entry
->stub_type
== arm_stub_cmse_branch_thumb_only
);
5993 /* Check visibility hasn't changed. */
5994 if (!!(flags
& BSF_GLOBAL
)
5995 != (hash
->root
.root
.type
== bfd_link_hash_defined
))
5997 (_("%B: visibility of symbol `%s' has changed."), in_implib_bfd
,
6000 stub_entry
->stub_offset
= stub_offset
;
6003 /* Size should match that of a SG veneer. */
6004 if (intsym
->st_size
!= cmse_stub_size
)
6006 _bfd_error_handler (_("%B: incorrect size for symbol `%s'."),
6007 in_implib_bfd
, sym_name
);
6011 /* Previous veneer address is before current SG veneer section. */
6012 if (veneer_value
< cmse_stub_sec_vma
)
6014 /* Avoid offset underflow. */
6016 stub_entry
->stub_offset
= 0;
6021 /* Complain if stub offset not a multiple of stub size. */
6022 if (stub_offset
% cmse_stub_size
)
6025 (_("Offset of veneer for entry function `%s' not a multiple of "
6026 "its size."), sym_name
);
6033 new_cmse_stubs_created
--;
6034 if (veneer_value
< cmse_stub_array_start
)
6035 cmse_stub_array_start
= veneer_value
;
6036 next_cmse_stub_offset
= stub_offset
+ ((cmse_stub_size
+ 7) & ~7);
6037 if (next_cmse_stub_offset
> htab
->new_cmse_stub_offset
)
6038 htab
->new_cmse_stub_offset
= next_cmse_stub_offset
;
6041 if (!info
->out_implib_bfd
&& new_cmse_stubs_created
!= 0)
6043 BFD_ASSERT (new_cmse_stubs_created
> 0);
6045 (_("new entry function(s) introduced but no output import library "
6047 bfd_hash_traverse (&htab
->stub_hash_table
, arm_list_new_cmse_stub
, info
);
6050 if (cmse_stub_array_start
!= cmse_stub_sec_vma
)
6053 (_("Start address of `%s' is different from previous link."),
6063 /* Determine and set the size of the stub section for a final link.
6065 The basic idea here is to examine all the relocations looking for
6066 PC-relative calls to a target that is unreachable with a "bl"
6070 elf32_arm_size_stubs (bfd
*output_bfd
,
6072 struct bfd_link_info
*info
,
6073 bfd_signed_vma group_size
,
6074 asection
* (*add_stub_section
) (const char *, asection
*,
6077 void (*layout_sections_again
) (void))
6079 bfd_boolean ret
= TRUE
;
6080 obj_attribute
*out_attr
;
6081 int cmse_stub_created
= 0;
6082 bfd_size_type stub_group_size
;
6083 bfd_boolean m_profile
, stubs_always_after_branch
, first_veneer_scan
= TRUE
;
6084 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
6085 struct a8_erratum_fix
*a8_fixes
= NULL
;
6086 unsigned int num_a8_fixes
= 0, a8_fix_table_size
= 10;
6087 struct a8_erratum_reloc
*a8_relocs
= NULL
;
6088 unsigned int num_a8_relocs
= 0, a8_reloc_table_size
= 10, i
;
6093 if (htab
->fix_cortex_a8
)
6095 a8_fixes
= (struct a8_erratum_fix
*)
6096 bfd_zmalloc (sizeof (struct a8_erratum_fix
) * a8_fix_table_size
);
6097 a8_relocs
= (struct a8_erratum_reloc
*)
6098 bfd_zmalloc (sizeof (struct a8_erratum_reloc
) * a8_reloc_table_size
);
6101 /* Propagate mach to stub bfd, because it may not have been
6102 finalized when we created stub_bfd. */
6103 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
6104 bfd_get_mach (output_bfd
));
6106 /* Stash our params away. */
6107 htab
->stub_bfd
= stub_bfd
;
6108 htab
->add_stub_section
= add_stub_section
;
6109 htab
->layout_sections_again
= layout_sections_again
;
6110 stubs_always_after_branch
= group_size
< 0;
6112 out_attr
= elf_known_obj_attributes_proc (output_bfd
);
6113 m_profile
= out_attr
[Tag_CPU_arch_profile
].i
== 'M';
6115 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
6116 as the first half of a 32-bit branch straddling two 4K pages. This is a
6117 crude way of enforcing that. */
6118 if (htab
->fix_cortex_a8
)
6119 stubs_always_after_branch
= 1;
6122 stub_group_size
= -group_size
;
6124 stub_group_size
= group_size
;
6126 if (stub_group_size
== 1)
6128 /* Default values. */
6129 /* Thumb branch range is +-4MB has to be used as the default
6130 maximum size (a given section can contain both ARM and Thumb
6131 code, so the worst case has to be taken into account).
6133 This value is 24K less than that, which allows for 2025
6134 12-byte stubs. If we exceed that, then we will fail to link.
6135 The user will have to relink with an explicit group size
6137 stub_group_size
= 4170000;
6140 group_sections (htab
, stub_group_size
, stubs_always_after_branch
);
6142 /* If we're applying the cortex A8 fix, we need to determine the
6143 program header size now, because we cannot change it later --
6144 that could alter section placements. Notice the A8 erratum fix
6145 ends up requiring the section addresses to remain unchanged
6146 modulo the page size. That's something we cannot represent
6147 inside BFD, and we don't want to force the section alignment to
6148 be the page size. */
6149 if (htab
->fix_cortex_a8
)
6150 (*htab
->layout_sections_again
) ();
6155 unsigned int bfd_indx
;
6157 enum elf32_arm_stub_type stub_type
;
6158 bfd_boolean stub_changed
= FALSE
;
6159 unsigned prev_num_a8_fixes
= num_a8_fixes
;
6162 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
6164 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
6166 Elf_Internal_Shdr
*symtab_hdr
;
6168 Elf_Internal_Sym
*local_syms
= NULL
;
6170 if (!is_arm_elf (input_bfd
))
6175 /* We'll need the symbol table in a second. */
6176 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
6177 if (symtab_hdr
->sh_info
== 0)
6180 /* Limit scan of symbols to object file whose profile is
6181 Microcontroller to not hinder performance in the general case. */
6182 if (m_profile
&& first_veneer_scan
)
6184 struct elf_link_hash_entry
**sym_hashes
;
6186 sym_hashes
= elf_sym_hashes (input_bfd
);
6187 if (!cmse_scan (input_bfd
, htab
, out_attr
, sym_hashes
,
6188 &cmse_stub_created
))
6189 goto error_ret_free_local
;
6191 if (cmse_stub_created
!= 0)
6192 stub_changed
= TRUE
;
6195 /* Walk over each section attached to the input bfd. */
6196 for (section
= input_bfd
->sections
;
6198 section
= section
->next
)
6200 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
6202 /* If there aren't any relocs, then there's nothing more
6204 if ((section
->flags
& SEC_RELOC
) == 0
6205 || section
->reloc_count
== 0
6206 || (section
->flags
& SEC_CODE
) == 0)
6209 /* If this section is a link-once section that will be
6210 discarded, then don't create any stubs. */
6211 if (section
->output_section
== NULL
6212 || section
->output_section
->owner
!= output_bfd
)
6215 /* Get the relocs. */
6217 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
6218 NULL
, info
->keep_memory
);
6219 if (internal_relocs
== NULL
)
6220 goto error_ret_free_local
;
6222 /* Now examine each relocation. */
6223 irela
= internal_relocs
;
6224 irelaend
= irela
+ section
->reloc_count
;
6225 for (; irela
< irelaend
; irela
++)
6227 unsigned int r_type
, r_indx
;
6230 bfd_vma destination
;
6231 struct elf32_arm_link_hash_entry
*hash
;
6232 const char *sym_name
;
6233 unsigned char st_type
;
6234 enum arm_st_branch_type branch_type
;
6235 bfd_boolean created_stub
= FALSE
;
6237 r_type
= ELF32_R_TYPE (irela
->r_info
);
6238 r_indx
= ELF32_R_SYM (irela
->r_info
);
6240 if (r_type
>= (unsigned int) R_ARM_max
)
6242 bfd_set_error (bfd_error_bad_value
);
6243 error_ret_free_internal
:
6244 if (elf_section_data (section
)->relocs
== NULL
)
6245 free (internal_relocs
);
6247 error_ret_free_local
:
6248 if (local_syms
!= NULL
6249 && (symtab_hdr
->contents
6250 != (unsigned char *) local_syms
))
6256 if (r_indx
>= symtab_hdr
->sh_info
)
6257 hash
= elf32_arm_hash_entry
6258 (elf_sym_hashes (input_bfd
)
6259 [r_indx
- symtab_hdr
->sh_info
]);
6261 /* Only look for stubs on branch instructions, or
6262 non-relaxed TLSCALL */
6263 if ((r_type
!= (unsigned int) R_ARM_CALL
)
6264 && (r_type
!= (unsigned int) R_ARM_THM_CALL
)
6265 && (r_type
!= (unsigned int) R_ARM_JUMP24
)
6266 && (r_type
!= (unsigned int) R_ARM_THM_JUMP19
)
6267 && (r_type
!= (unsigned int) R_ARM_THM_XPC22
)
6268 && (r_type
!= (unsigned int) R_ARM_THM_JUMP24
)
6269 && (r_type
!= (unsigned int) R_ARM_PLT32
)
6270 && !((r_type
== (unsigned int) R_ARM_TLS_CALL
6271 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
6272 && r_type
== elf32_arm_tls_transition
6273 (info
, r_type
, &hash
->root
)
6274 && ((hash
? hash
->tls_type
6275 : (elf32_arm_local_got_tls_type
6276 (input_bfd
)[r_indx
]))
6277 & GOT_TLS_GDESC
) != 0))
6280 /* Now determine the call target, its name, value,
6287 if (r_type
== (unsigned int) R_ARM_TLS_CALL
6288 || r_type
== (unsigned int) R_ARM_THM_TLS_CALL
)
6290 /* A non-relaxed TLS call. The target is the
6291 plt-resident trampoline and nothing to do
6293 BFD_ASSERT (htab
->tls_trampoline
> 0);
6294 sym_sec
= htab
->root
.splt
;
6295 sym_value
= htab
->tls_trampoline
;
6298 branch_type
= ST_BRANCH_TO_ARM
;
6302 /* It's a local symbol. */
6303 Elf_Internal_Sym
*sym
;
6305 if (local_syms
== NULL
)
6308 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
6309 if (local_syms
== NULL
)
6311 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
6312 symtab_hdr
->sh_info
, 0,
6314 if (local_syms
== NULL
)
6315 goto error_ret_free_internal
;
6318 sym
= local_syms
+ r_indx
;
6319 if (sym
->st_shndx
== SHN_UNDEF
)
6320 sym_sec
= bfd_und_section_ptr
;
6321 else if (sym
->st_shndx
== SHN_ABS
)
6322 sym_sec
= bfd_abs_section_ptr
;
6323 else if (sym
->st_shndx
== SHN_COMMON
)
6324 sym_sec
= bfd_com_section_ptr
;
6327 bfd_section_from_elf_index (input_bfd
, sym
->st_shndx
);
6330 /* This is an undefined symbol. It can never
6334 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
6335 sym_value
= sym
->st_value
;
6336 destination
= (sym_value
+ irela
->r_addend
6337 + sym_sec
->output_offset
6338 + sym_sec
->output_section
->vma
);
6339 st_type
= ELF_ST_TYPE (sym
->st_info
);
6341 ARM_GET_SYM_BRANCH_TYPE (sym
->st_target_internal
);
6343 = bfd_elf_string_from_elf_section (input_bfd
,
6344 symtab_hdr
->sh_link
,
6349 /* It's an external symbol. */
6350 while (hash
->root
.root
.type
== bfd_link_hash_indirect
6351 || hash
->root
.root
.type
== bfd_link_hash_warning
)
6352 hash
= ((struct elf32_arm_link_hash_entry
*)
6353 hash
->root
.root
.u
.i
.link
);
6355 if (hash
->root
.root
.type
== bfd_link_hash_defined
6356 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
6358 sym_sec
= hash
->root
.root
.u
.def
.section
;
6359 sym_value
= hash
->root
.root
.u
.def
.value
;
6361 struct elf32_arm_link_hash_table
*globals
=
6362 elf32_arm_hash_table (info
);
6364 /* For a destination in a shared library,
6365 use the PLT stub as target address to
6366 decide whether a branch stub is
6369 && globals
->root
.splt
!= NULL
6371 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
6373 sym_sec
= globals
->root
.splt
;
6374 sym_value
= hash
->root
.plt
.offset
;
6375 if (sym_sec
->output_section
!= NULL
)
6376 destination
= (sym_value
6377 + sym_sec
->output_offset
6378 + sym_sec
->output_section
->vma
);
6380 else if (sym_sec
->output_section
!= NULL
)
6381 destination
= (sym_value
+ irela
->r_addend
6382 + sym_sec
->output_offset
6383 + sym_sec
->output_section
->vma
);
6385 else if ((hash
->root
.root
.type
== bfd_link_hash_undefined
)
6386 || (hash
->root
.root
.type
== bfd_link_hash_undefweak
))
6388 /* For a shared library, use the PLT stub as
6389 target address to decide whether a long
6390 branch stub is needed.
6391 For absolute code, they cannot be handled. */
6392 struct elf32_arm_link_hash_table
*globals
=
6393 elf32_arm_hash_table (info
);
6396 && globals
->root
.splt
!= NULL
6398 && hash
->root
.plt
.offset
!= (bfd_vma
) -1)
6400 sym_sec
= globals
->root
.splt
;
6401 sym_value
= hash
->root
.plt
.offset
;
6402 if (sym_sec
->output_section
!= NULL
)
6403 destination
= (sym_value
6404 + sym_sec
->output_offset
6405 + sym_sec
->output_section
->vma
);
6412 bfd_set_error (bfd_error_bad_value
);
6413 goto error_ret_free_internal
;
6415 st_type
= hash
->root
.type
;
6417 ARM_GET_SYM_BRANCH_TYPE (hash
->root
.target_internal
);
6418 sym_name
= hash
->root
.root
.root
.string
;
6423 bfd_boolean new_stub
;
6424 struct elf32_arm_stub_hash_entry
*stub_entry
;
6426 /* Determine what (if any) linker stub is needed. */
6427 stub_type
= arm_type_of_stub (info
, section
, irela
,
6428 st_type
, &branch_type
,
6429 hash
, destination
, sym_sec
,
6430 input_bfd
, sym_name
);
6431 if (stub_type
== arm_stub_none
)
6434 /* We've either created a stub for this reloc already,
6435 or we are about to. */
6437 elf32_arm_create_stub (htab
, stub_type
, section
, irela
,
6439 (char *) sym_name
, sym_value
,
6440 branch_type
, &new_stub
);
6442 created_stub
= stub_entry
!= NULL
;
6444 goto error_ret_free_internal
;
6448 stub_changed
= TRUE
;
6452 /* Look for relocations which might trigger Cortex-A8
6454 if (htab
->fix_cortex_a8
6455 && (r_type
== (unsigned int) R_ARM_THM_JUMP24
6456 || r_type
== (unsigned int) R_ARM_THM_JUMP19
6457 || r_type
== (unsigned int) R_ARM_THM_CALL
6458 || r_type
== (unsigned int) R_ARM_THM_XPC22
))
6460 bfd_vma from
= section
->output_section
->vma
6461 + section
->output_offset
6464 if ((from
& 0xfff) == 0xffe)
6466 /* Found a candidate. Note we haven't checked the
6467 destination is within 4K here: if we do so (and
6468 don't create an entry in a8_relocs) we can't tell
6469 that a branch should have been relocated when
6471 if (num_a8_relocs
== a8_reloc_table_size
)
6473 a8_reloc_table_size
*= 2;
6474 a8_relocs
= (struct a8_erratum_reloc
*)
6475 bfd_realloc (a8_relocs
,
6476 sizeof (struct a8_erratum_reloc
)
6477 * a8_reloc_table_size
);
6480 a8_relocs
[num_a8_relocs
].from
= from
;
6481 a8_relocs
[num_a8_relocs
].destination
= destination
;
6482 a8_relocs
[num_a8_relocs
].r_type
= r_type
;
6483 a8_relocs
[num_a8_relocs
].branch_type
= branch_type
;
6484 a8_relocs
[num_a8_relocs
].sym_name
= sym_name
;
6485 a8_relocs
[num_a8_relocs
].non_a8_stub
= created_stub
;
6486 a8_relocs
[num_a8_relocs
].hash
= hash
;
6493 /* We're done with the internal relocs, free them. */
6494 if (elf_section_data (section
)->relocs
== NULL
)
6495 free (internal_relocs
);
6498 if (htab
->fix_cortex_a8
)
6500 /* Sort relocs which might apply to Cortex-A8 erratum. */
6501 qsort (a8_relocs
, num_a8_relocs
,
6502 sizeof (struct a8_erratum_reloc
),
6505 /* Scan for branches which might trigger Cortex-A8 erratum. */
6506 if (cortex_a8_erratum_scan (input_bfd
, info
, &a8_fixes
,
6507 &num_a8_fixes
, &a8_fix_table_size
,
6508 a8_relocs
, num_a8_relocs
,
6509 prev_num_a8_fixes
, &stub_changed
)
6511 goto error_ret_free_local
;
6514 if (local_syms
!= NULL
6515 && symtab_hdr
->contents
!= (unsigned char *) local_syms
)
6517 if (!info
->keep_memory
)
6520 symtab_hdr
->contents
= (unsigned char *) local_syms
;
6524 if (first_veneer_scan
6525 && !set_cmse_veneer_addr_from_implib (info
, htab
,
6526 &cmse_stub_created
))
6529 if (prev_num_a8_fixes
!= num_a8_fixes
)
6530 stub_changed
= TRUE
;
6535 /* OK, we've added some stubs. Find out the new size of the
6537 for (stub_sec
= htab
->stub_bfd
->sections
;
6539 stub_sec
= stub_sec
->next
)
6541 /* Ignore non-stub sections. */
6542 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
6548 /* Add new SG veneers after those already in the input import
6550 for (stub_type
= arm_stub_none
+ 1; stub_type
< max_stub_type
;
6553 bfd_vma
*start_offset_p
;
6554 asection
**stub_sec_p
;
6556 start_offset_p
= arm_new_stubs_start_offset_ptr (htab
, stub_type
);
6557 stub_sec_p
= arm_dedicated_stub_input_section_ptr (htab
, stub_type
);
6558 if (start_offset_p
== NULL
)
6561 BFD_ASSERT (stub_sec_p
!= NULL
);
6562 if (*stub_sec_p
!= NULL
)
6563 (*stub_sec_p
)->size
= *start_offset_p
;
6566 /* Compute stub section size, considering padding. */
6567 bfd_hash_traverse (&htab
->stub_hash_table
, arm_size_one_stub
, htab
);
6568 for (stub_type
= arm_stub_none
+ 1; stub_type
< max_stub_type
;
6572 asection
**stub_sec_p
;
6574 padding
= arm_dedicated_stub_section_padding (stub_type
);
6575 stub_sec_p
= arm_dedicated_stub_input_section_ptr (htab
, stub_type
);
6576 /* Skip if no stub input section or no stub section padding
6578 if ((stub_sec_p
!= NULL
&& *stub_sec_p
== NULL
) || padding
== 0)
6580 /* Stub section padding required but no dedicated section. */
6581 BFD_ASSERT (stub_sec_p
);
6583 size
= (*stub_sec_p
)->size
;
6584 size
= (size
+ padding
- 1) & ~(padding
- 1);
6585 (*stub_sec_p
)->size
= size
;
6588 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
6589 if (htab
->fix_cortex_a8
)
6590 for (i
= 0; i
< num_a8_fixes
; i
++)
6592 stub_sec
= elf32_arm_create_or_find_stub_sec (NULL
,
6593 a8_fixes
[i
].section
, htab
, a8_fixes
[i
].stub_type
);
6595 if (stub_sec
== NULL
)
6599 += find_stub_size_and_template (a8_fixes
[i
].stub_type
, NULL
,
6604 /* Ask the linker to do its stuff. */
6605 (*htab
->layout_sections_again
) ();
6606 first_veneer_scan
= FALSE
;
6609 /* Add stubs for Cortex-A8 erratum fixes now. */
6610 if (htab
->fix_cortex_a8
)
6612 for (i
= 0; i
< num_a8_fixes
; i
++)
6614 struct elf32_arm_stub_hash_entry
*stub_entry
;
6615 char *stub_name
= a8_fixes
[i
].stub_name
;
6616 asection
*section
= a8_fixes
[i
].section
;
6617 unsigned int section_id
= a8_fixes
[i
].section
->id
;
6618 asection
*link_sec
= htab
->stub_group
[section_id
].link_sec
;
6619 asection
*stub_sec
= htab
->stub_group
[section_id
].stub_sec
;
6620 const insn_sequence
*template_sequence
;
6621 int template_size
, size
= 0;
6623 stub_entry
= arm_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
6625 if (stub_entry
== NULL
)
6627 _bfd_error_handler (_("%B: cannot create stub entry %s"),
6628 section
->owner
, stub_name
);
6632 stub_entry
->stub_sec
= stub_sec
;
6633 stub_entry
->stub_offset
= (bfd_vma
) -1;
6634 stub_entry
->id_sec
= link_sec
;
6635 stub_entry
->stub_type
= a8_fixes
[i
].stub_type
;
6636 stub_entry
->source_value
= a8_fixes
[i
].offset
;
6637 stub_entry
->target_section
= a8_fixes
[i
].section
;
6638 stub_entry
->target_value
= a8_fixes
[i
].target_offset
;
6639 stub_entry
->orig_insn
= a8_fixes
[i
].orig_insn
;
6640 stub_entry
->branch_type
= a8_fixes
[i
].branch_type
;
6642 size
= find_stub_size_and_template (a8_fixes
[i
].stub_type
,
6646 stub_entry
->stub_size
= size
;
6647 stub_entry
->stub_template
= template_sequence
;
6648 stub_entry
->stub_template_size
= template_size
;
6651 /* Stash the Cortex-A8 erratum fix array for use later in
6652 elf32_arm_write_section(). */
6653 htab
->a8_erratum_fixes
= a8_fixes
;
6654 htab
->num_a8_erratum_fixes
= num_a8_fixes
;
6658 htab
->a8_erratum_fixes
= NULL
;
6659 htab
->num_a8_erratum_fixes
= 0;
6664 /* Build all the stubs associated with the current output file. The
6665 stubs are kept in a hash table attached to the main linker hash
6666 table. We also set up the .plt entries for statically linked PIC
6667 functions here. This function is called via arm_elf_finish in the
6671 elf32_arm_build_stubs (struct bfd_link_info
*info
)
6674 struct bfd_hash_table
*table
;
6675 enum elf32_arm_stub_type stub_type
;
6676 struct elf32_arm_link_hash_table
*htab
;
6678 htab
= elf32_arm_hash_table (info
);
6682 for (stub_sec
= htab
->stub_bfd
->sections
;
6684 stub_sec
= stub_sec
->next
)
6688 /* Ignore non-stub sections. */
6689 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
6692 /* Allocate memory to hold the linker stubs. Zeroing the stub sections
6693 must at least be done for stub section requiring padding and for SG
6694 veneers to ensure that a non secure code branching to a removed SG
6695 veneer causes an error. */
6696 size
= stub_sec
->size
;
6697 stub_sec
->contents
= (unsigned char *) bfd_zalloc (htab
->stub_bfd
, size
);
6698 if (stub_sec
->contents
== NULL
&& size
!= 0)
6704 /* Add new SG veneers after those already in the input import library. */
6705 for (stub_type
= arm_stub_none
+ 1; stub_type
< max_stub_type
; stub_type
++)
6707 bfd_vma
*start_offset_p
;
6708 asection
**stub_sec_p
;
6710 start_offset_p
= arm_new_stubs_start_offset_ptr (htab
, stub_type
);
6711 stub_sec_p
= arm_dedicated_stub_input_section_ptr (htab
, stub_type
);
6712 if (start_offset_p
== NULL
)
6715 BFD_ASSERT (stub_sec_p
!= NULL
);
6716 if (*stub_sec_p
!= NULL
)
6717 (*stub_sec_p
)->size
= *start_offset_p
;
6720 /* Build the stubs as directed by the stub hash table. */
6721 table
= &htab
->stub_hash_table
;
6722 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
6723 if (htab
->fix_cortex_a8
)
6725 /* Place the cortex a8 stubs last. */
6726 htab
->fix_cortex_a8
= -1;
6727 bfd_hash_traverse (table
, arm_build_one_stub
, info
);
6733 /* Locate the Thumb encoded calling stub for NAME. */
6735 static struct elf_link_hash_entry
*
6736 find_thumb_glue (struct bfd_link_info
*link_info
,
6738 char **error_message
)
6741 struct elf_link_hash_entry
*hash
;
6742 struct elf32_arm_link_hash_table
*hash_table
;
6744 /* We need a pointer to the armelf specific hash table. */
6745 hash_table
= elf32_arm_hash_table (link_info
);
6746 if (hash_table
== NULL
)
6749 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
6750 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
6752 BFD_ASSERT (tmp_name
);
6754 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
6756 hash
= elf_link_hash_lookup
6757 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6760 && asprintf (error_message
, _("unable to find THUMB glue '%s' for '%s'"),
6761 tmp_name
, name
) == -1)
6762 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
6769 /* Locate the ARM encoded calling stub for NAME. */
6771 static struct elf_link_hash_entry
*
6772 find_arm_glue (struct bfd_link_info
*link_info
,
6774 char **error_message
)
6777 struct elf_link_hash_entry
*myh
;
6778 struct elf32_arm_link_hash_table
*hash_table
;
6780 /* We need a pointer to the elfarm specific hash table. */
6781 hash_table
= elf32_arm_hash_table (link_info
);
6782 if (hash_table
== NULL
)
6785 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
6786 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
6788 BFD_ASSERT (tmp_name
);
6790 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
6792 myh
= elf_link_hash_lookup
6793 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6796 && asprintf (error_message
, _("unable to find ARM glue '%s' for '%s'"),
6797 tmp_name
, name
) == -1)
6798 *error_message
= (char *) bfd_errmsg (bfd_error_system_call
);
6805 /* ARM->Thumb glue (static images):
6809 ldr r12, __func_addr
6812 .word func @ behave as if you saw a ARM_32 reloc.
6819 .word func @ behave as if you saw a ARM_32 reloc.
6821 (relocatable images)
6824 ldr r12, __func_offset
6830 #define ARM2THUMB_STATIC_GLUE_SIZE 12
6831 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
6832 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
6833 static const insn32 a2t3_func_addr_insn
= 0x00000001;
6835 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
6836 static const insn32 a2t1v5_ldr_insn
= 0xe51ff004;
6837 static const insn32 a2t2v5_func_addr_insn
= 0x00000001;
6839 #define ARM2THUMB_PIC_GLUE_SIZE 16
6840 static const insn32 a2t1p_ldr_insn
= 0xe59fc004;
6841 static const insn32 a2t2p_add_pc_insn
= 0xe08cc00f;
6842 static const insn32 a2t3p_bx_r12_insn
= 0xe12fff1c;
6844 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
6848 __func_from_thumb: __func_from_thumb:
6850 nop ldr r6, __func_addr
6860 #define THUMB2ARM_GLUE_SIZE 8
6861 static const insn16 t2a1_bx_pc_insn
= 0x4778;
6862 static const insn16 t2a2_noop_insn
= 0x46c0;
6863 static const insn32 t2a3_b_insn
= 0xea000000;
6865 #define VFP11_ERRATUM_VENEER_SIZE 8
6866 #define STM32L4XX_ERRATUM_LDM_VENEER_SIZE 16
6867 #define STM32L4XX_ERRATUM_VLDM_VENEER_SIZE 24
6869 #define ARM_BX_VENEER_SIZE 12
6870 static const insn32 armbx1_tst_insn
= 0xe3100001;
6871 static const insn32 armbx2_moveq_insn
= 0x01a0f000;
6872 static const insn32 armbx3_bx_insn
= 0xe12fff10;
6874 #ifndef ELFARM_NABI_C_INCLUDED
6876 arm_allocate_glue_section_space (bfd
* abfd
, bfd_size_type size
, const char * name
)
6879 bfd_byte
* contents
;
6883 /* Do not include empty glue sections in the output. */
6886 s
= bfd_get_linker_section (abfd
, name
);
6888 s
->flags
|= SEC_EXCLUDE
;
6893 BFD_ASSERT (abfd
!= NULL
);
6895 s
= bfd_get_linker_section (abfd
, name
);
6896 BFD_ASSERT (s
!= NULL
);
6898 contents
= (bfd_byte
*) bfd_alloc (abfd
, size
);
6900 BFD_ASSERT (s
->size
== size
);
6901 s
->contents
= contents
;
6905 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
6907 struct elf32_arm_link_hash_table
* globals
;
6909 globals
= elf32_arm_hash_table (info
);
6910 BFD_ASSERT (globals
!= NULL
);
6912 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
6913 globals
->arm_glue_size
,
6914 ARM2THUMB_GLUE_SECTION_NAME
);
6916 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
6917 globals
->thumb_glue_size
,
6918 THUMB2ARM_GLUE_SECTION_NAME
);
6920 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
6921 globals
->vfp11_erratum_glue_size
,
6922 VFP11_ERRATUM_VENEER_SECTION_NAME
);
6924 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
6925 globals
->stm32l4xx_erratum_glue_size
,
6926 STM32L4XX_ERRATUM_VENEER_SECTION_NAME
);
6928 arm_allocate_glue_section_space (globals
->bfd_of_glue_owner
,
6929 globals
->bx_glue_size
,
6930 ARM_BX_GLUE_SECTION_NAME
);
6935 /* Allocate space and symbols for calling a Thumb function from Arm mode.
6936 returns the symbol identifying the stub. */
6938 static struct elf_link_hash_entry
*
6939 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
6940 struct elf_link_hash_entry
* h
)
6942 const char * name
= h
->root
.root
.string
;
6945 struct elf_link_hash_entry
* myh
;
6946 struct bfd_link_hash_entry
* bh
;
6947 struct elf32_arm_link_hash_table
* globals
;
6951 globals
= elf32_arm_hash_table (link_info
);
6952 BFD_ASSERT (globals
!= NULL
);
6953 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
6955 s
= bfd_get_linker_section
6956 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
6958 BFD_ASSERT (s
!= NULL
);
6960 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen (name
)
6961 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
6963 BFD_ASSERT (tmp_name
);
6965 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
6967 myh
= elf_link_hash_lookup
6968 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
6972 /* We've already seen this guy. */
6977 /* The only trick here is using hash_table->arm_glue_size as the value.
6978 Even though the section isn't allocated yet, this is where we will be
6979 putting it. The +1 on the value marks that the stub has not been
6980 output yet - not that it is a Thumb function. */
6982 val
= globals
->arm_glue_size
+ 1;
6983 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
6984 tmp_name
, BSF_GLOBAL
, s
, val
,
6985 NULL
, TRUE
, FALSE
, &bh
);
6987 myh
= (struct elf_link_hash_entry
*) bh
;
6988 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
6989 myh
->forced_local
= 1;
6993 if (bfd_link_pic (link_info
)
6994 || globals
->root
.is_relocatable_executable
6995 || globals
->pic_veneer
)
6996 size
= ARM2THUMB_PIC_GLUE_SIZE
;
6997 else if (globals
->use_blx
)
6998 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
7000 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
7003 globals
->arm_glue_size
+= size
;
7008 /* Allocate space for ARMv4 BX veneers. */
7011 record_arm_bx_glue (struct bfd_link_info
* link_info
, int reg
)
7014 struct elf32_arm_link_hash_table
*globals
;
7016 struct elf_link_hash_entry
*myh
;
7017 struct bfd_link_hash_entry
*bh
;
7020 /* BX PC does not need a veneer. */
7024 globals
= elf32_arm_hash_table (link_info
);
7025 BFD_ASSERT (globals
!= NULL
);
7026 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
7028 /* Check if this veneer has already been allocated. */
7029 if (globals
->bx_glue_offset
[reg
])
7032 s
= bfd_get_linker_section
7033 (globals
->bfd_of_glue_owner
, ARM_BX_GLUE_SECTION_NAME
);
7035 BFD_ASSERT (s
!= NULL
);
7037 /* Add symbol for veneer. */
7039 bfd_malloc ((bfd_size_type
) strlen (ARM_BX_GLUE_ENTRY_NAME
) + 1);
7041 BFD_ASSERT (tmp_name
);
7043 sprintf (tmp_name
, ARM_BX_GLUE_ENTRY_NAME
, reg
);
7045 myh
= elf_link_hash_lookup
7046 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
7048 BFD_ASSERT (myh
== NULL
);
7051 val
= globals
->bx_glue_size
;
7052 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
7053 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
7054 NULL
, TRUE
, FALSE
, &bh
);
7056 myh
= (struct elf_link_hash_entry
*) bh
;
7057 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7058 myh
->forced_local
= 1;
7060 s
->size
+= ARM_BX_VENEER_SIZE
;
7061 globals
->bx_glue_offset
[reg
] = globals
->bx_glue_size
| 2;
7062 globals
->bx_glue_size
+= ARM_BX_VENEER_SIZE
;
7066 /* Add an entry to the code/data map for section SEC. */
7069 elf32_arm_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
7071 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
7072 unsigned int newidx
;
7074 if (sec_data
->map
== NULL
)
7076 sec_data
->map
= (elf32_arm_section_map
*)
7077 bfd_malloc (sizeof (elf32_arm_section_map
));
7078 sec_data
->mapcount
= 0;
7079 sec_data
->mapsize
= 1;
7082 newidx
= sec_data
->mapcount
++;
7084 if (sec_data
->mapcount
> sec_data
->mapsize
)
7086 sec_data
->mapsize
*= 2;
7087 sec_data
->map
= (elf32_arm_section_map
*)
7088 bfd_realloc_or_free (sec_data
->map
, sec_data
->mapsize
7089 * sizeof (elf32_arm_section_map
));
7094 sec_data
->map
[newidx
].vma
= vma
;
7095 sec_data
->map
[newidx
].type
= type
;
7100 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
7101 veneers are handled for now. */
7104 record_vfp11_erratum_veneer (struct bfd_link_info
*link_info
,
7105 elf32_vfp11_erratum_list
*branch
,
7107 asection
*branch_sec
,
7108 unsigned int offset
)
7111 struct elf32_arm_link_hash_table
*hash_table
;
7113 struct elf_link_hash_entry
*myh
;
7114 struct bfd_link_hash_entry
*bh
;
7116 struct _arm_elf_section_data
*sec_data
;
7117 elf32_vfp11_erratum_list
*newerr
;
7119 hash_table
= elf32_arm_hash_table (link_info
);
7120 BFD_ASSERT (hash_table
!= NULL
);
7121 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
7123 s
= bfd_get_linker_section
7124 (hash_table
->bfd_of_glue_owner
, VFP11_ERRATUM_VENEER_SECTION_NAME
);
7126 sec_data
= elf32_arm_section_data (s
);
7128 BFD_ASSERT (s
!= NULL
);
7130 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
7131 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
7133 BFD_ASSERT (tmp_name
);
7135 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
7136 hash_table
->num_vfp11_fixes
);
7138 myh
= elf_link_hash_lookup
7139 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
7141 BFD_ASSERT (myh
== NULL
);
7144 val
= hash_table
->vfp11_erratum_glue_size
;
7145 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
7146 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
7147 NULL
, TRUE
, FALSE
, &bh
);
7149 myh
= (struct elf_link_hash_entry
*) bh
;
7150 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7151 myh
->forced_local
= 1;
7153 /* Link veneer back to calling location. */
7154 sec_data
->erratumcount
+= 1;
7155 newerr
= (elf32_vfp11_erratum_list
*)
7156 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
7158 newerr
->type
= VFP11_ERRATUM_ARM_VENEER
;
7160 newerr
->u
.v
.branch
= branch
;
7161 newerr
->u
.v
.id
= hash_table
->num_vfp11_fixes
;
7162 branch
->u
.b
.veneer
= newerr
;
7164 newerr
->next
= sec_data
->erratumlist
;
7165 sec_data
->erratumlist
= newerr
;
7167 /* A symbol for the return from the veneer. */
7168 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
7169 hash_table
->num_vfp11_fixes
);
7171 myh
= elf_link_hash_lookup
7172 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
7179 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
7180 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
7182 myh
= (struct elf_link_hash_entry
*) bh
;
7183 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7184 myh
->forced_local
= 1;
7188 /* Generate a mapping symbol for the veneer section, and explicitly add an
7189 entry for that symbol to the code/data map for the section. */
7190 if (hash_table
->vfp11_erratum_glue_size
== 0)
7193 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
7194 ever requires this erratum fix. */
7195 _bfd_generic_link_add_one_symbol (link_info
,
7196 hash_table
->bfd_of_glue_owner
, "$a",
7197 BSF_LOCAL
, s
, 0, NULL
,
7200 myh
= (struct elf_link_hash_entry
*) bh
;
7201 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
7202 myh
->forced_local
= 1;
7204 /* The elf32_arm_init_maps function only cares about symbols from input
7205 BFDs. We must make a note of this generated mapping symbol
7206 ourselves so that code byteswapping works properly in
7207 elf32_arm_write_section. */
7208 elf32_arm_section_map_add (s
, 'a', 0);
7211 s
->size
+= VFP11_ERRATUM_VENEER_SIZE
;
7212 hash_table
->vfp11_erratum_glue_size
+= VFP11_ERRATUM_VENEER_SIZE
;
7213 hash_table
->num_vfp11_fixes
++;
7215 /* The offset of the veneer. */
7219 /* Record information about a STM32L4XX STM erratum veneer. Only THUMB-mode
7220 veneers need to be handled because used only in Cortex-M. */
7223 record_stm32l4xx_erratum_veneer (struct bfd_link_info
*link_info
,
7224 elf32_stm32l4xx_erratum_list
*branch
,
7226 asection
*branch_sec
,
7227 unsigned int offset
,
7228 bfd_size_type veneer_size
)
7231 struct elf32_arm_link_hash_table
*hash_table
;
7233 struct elf_link_hash_entry
*myh
;
7234 struct bfd_link_hash_entry
*bh
;
7236 struct _arm_elf_section_data
*sec_data
;
7237 elf32_stm32l4xx_erratum_list
*newerr
;
7239 hash_table
= elf32_arm_hash_table (link_info
);
7240 BFD_ASSERT (hash_table
!= NULL
);
7241 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
7243 s
= bfd_get_linker_section
7244 (hash_table
->bfd_of_glue_owner
, STM32L4XX_ERRATUM_VENEER_SECTION_NAME
);
7246 BFD_ASSERT (s
!= NULL
);
7248 sec_data
= elf32_arm_section_data (s
);
7250 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
7251 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME
) + 10);
7253 BFD_ASSERT (tmp_name
);
7255 sprintf (tmp_name
, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME
,
7256 hash_table
->num_stm32l4xx_fixes
);
7258 myh
= elf_link_hash_lookup
7259 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
7261 BFD_ASSERT (myh
== NULL
);
7264 val
= hash_table
->stm32l4xx_erratum_glue_size
;
7265 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
7266 tmp_name
, BSF_FUNCTION
| BSF_LOCAL
, s
, val
,
7267 NULL
, TRUE
, FALSE
, &bh
);
7269 myh
= (struct elf_link_hash_entry
*) bh
;
7270 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7271 myh
->forced_local
= 1;
7273 /* Link veneer back to calling location. */
7274 sec_data
->stm32l4xx_erratumcount
+= 1;
7275 newerr
= (elf32_stm32l4xx_erratum_list
*)
7276 bfd_zmalloc (sizeof (elf32_stm32l4xx_erratum_list
));
7278 newerr
->type
= STM32L4XX_ERRATUM_VENEER
;
7280 newerr
->u
.v
.branch
= branch
;
7281 newerr
->u
.v
.id
= hash_table
->num_stm32l4xx_fixes
;
7282 branch
->u
.b
.veneer
= newerr
;
7284 newerr
->next
= sec_data
->stm32l4xx_erratumlist
;
7285 sec_data
->stm32l4xx_erratumlist
= newerr
;
7287 /* A symbol for the return from the veneer. */
7288 sprintf (tmp_name
, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME
"_r",
7289 hash_table
->num_stm32l4xx_fixes
);
7291 myh
= elf_link_hash_lookup
7292 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, FALSE
);
7299 _bfd_generic_link_add_one_symbol (link_info
, branch_bfd
, tmp_name
, BSF_LOCAL
,
7300 branch_sec
, val
, NULL
, TRUE
, FALSE
, &bh
);
7302 myh
= (struct elf_link_hash_entry
*) bh
;
7303 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7304 myh
->forced_local
= 1;
7308 /* Generate a mapping symbol for the veneer section, and explicitly add an
7309 entry for that symbol to the code/data map for the section. */
7310 if (hash_table
->stm32l4xx_erratum_glue_size
== 0)
7313 /* Creates a THUMB symbol since there is no other choice. */
7314 _bfd_generic_link_add_one_symbol (link_info
,
7315 hash_table
->bfd_of_glue_owner
, "$t",
7316 BSF_LOCAL
, s
, 0, NULL
,
7319 myh
= (struct elf_link_hash_entry
*) bh
;
7320 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
7321 myh
->forced_local
= 1;
7323 /* The elf32_arm_init_maps function only cares about symbols from input
7324 BFDs. We must make a note of this generated mapping symbol
7325 ourselves so that code byteswapping works properly in
7326 elf32_arm_write_section. */
7327 elf32_arm_section_map_add (s
, 't', 0);
7330 s
->size
+= veneer_size
;
7331 hash_table
->stm32l4xx_erratum_glue_size
+= veneer_size
;
7332 hash_table
->num_stm32l4xx_fixes
++;
7334 /* The offset of the veneer. */
7338 #define ARM_GLUE_SECTION_FLAGS \
7339 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
7340 | SEC_READONLY | SEC_LINKER_CREATED)
7342 /* Create a fake section for use by the ARM backend of the linker. */
7345 arm_make_glue_section (bfd
* abfd
, const char * name
)
7349 sec
= bfd_get_linker_section (abfd
, name
);
7354 sec
= bfd_make_section_anyway_with_flags (abfd
, name
, ARM_GLUE_SECTION_FLAGS
);
7357 || !bfd_set_section_alignment (abfd
, sec
, 2))
7360 /* Set the gc mark to prevent the section from being removed by garbage
7361 collection, despite the fact that no relocs refer to this section. */
7367 /* Set size of .plt entries. This function is called from the
7368 linker scripts in ld/emultempl/{armelf}.em. */
7371 bfd_elf32_arm_use_long_plt (void)
7373 elf32_arm_use_long_plt_entry
= TRUE
;
7376 /* Add the glue sections to ABFD. This function is called from the
7377 linker scripts in ld/emultempl/{armelf}.em. */
7380 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
7381 struct bfd_link_info
*info
)
7383 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
7384 bfd_boolean dostm32l4xx
= globals
7385 && globals
->stm32l4xx_fix
!= BFD_ARM_STM32L4XX_FIX_NONE
;
7386 bfd_boolean addglue
;
7388 /* If we are only performing a partial
7389 link do not bother adding the glue. */
7390 if (bfd_link_relocatable (info
))
7393 addglue
= arm_make_glue_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
)
7394 && arm_make_glue_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
)
7395 && arm_make_glue_section (abfd
, VFP11_ERRATUM_VENEER_SECTION_NAME
)
7396 && arm_make_glue_section (abfd
, ARM_BX_GLUE_SECTION_NAME
);
7402 && arm_make_glue_section (abfd
, STM32L4XX_ERRATUM_VENEER_SECTION_NAME
);
7405 /* Mark output sections of veneers needing a dedicated one with SEC_KEEP. This
7406 ensures they are not marked for deletion by
7407 strip_excluded_output_sections () when veneers are going to be created
7408 later. Not doing so would trigger assert on empty section size in
7409 lang_size_sections_1 (). */
7412 bfd_elf32_arm_keep_private_stub_output_sections (struct bfd_link_info
*info
)
7414 enum elf32_arm_stub_type stub_type
;
7416 /* If we are only performing a partial
7417 link do not bother adding the glue. */
7418 if (bfd_link_relocatable (info
))
7421 for (stub_type
= arm_stub_none
+ 1; stub_type
< max_stub_type
; stub_type
++)
7424 const char *out_sec_name
;
7426 if (!arm_dedicated_stub_output_section_required (stub_type
))
7429 out_sec_name
= arm_dedicated_stub_output_section_name (stub_type
);
7430 out_sec
= bfd_get_section_by_name (info
->output_bfd
, out_sec_name
);
7431 if (out_sec
!= NULL
)
7432 out_sec
->flags
|= SEC_KEEP
;
7436 /* Select a BFD to be used to hold the sections used by the glue code.
7437 This function is called from the linker scripts in ld/emultempl/
7441 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
7443 struct elf32_arm_link_hash_table
*globals
;
7445 /* If we are only performing a partial link
7446 do not bother getting a bfd to hold the glue. */
7447 if (bfd_link_relocatable (info
))
7450 /* Make sure we don't attach the glue sections to a dynamic object. */
7451 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
7453 globals
= elf32_arm_hash_table (info
);
7454 BFD_ASSERT (globals
!= NULL
);
7456 if (globals
->bfd_of_glue_owner
!= NULL
)
7459 /* Save the bfd for later use. */
7460 globals
->bfd_of_glue_owner
= abfd
;
7466 check_use_blx (struct elf32_arm_link_hash_table
*globals
)
7470 cpu_arch
= bfd_elf_get_obj_attr_int (globals
->obfd
, OBJ_ATTR_PROC
,
7473 if (globals
->fix_arm1176
)
7475 if (cpu_arch
== TAG_CPU_ARCH_V6T2
|| cpu_arch
> TAG_CPU_ARCH_V6K
)
7476 globals
->use_blx
= 1;
7480 if (cpu_arch
> TAG_CPU_ARCH_V4T
)
7481 globals
->use_blx
= 1;
7486 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
7487 struct bfd_link_info
*link_info
)
7489 Elf_Internal_Shdr
*symtab_hdr
;
7490 Elf_Internal_Rela
*internal_relocs
= NULL
;
7491 Elf_Internal_Rela
*irel
, *irelend
;
7492 bfd_byte
*contents
= NULL
;
7495 struct elf32_arm_link_hash_table
*globals
;
7497 /* If we are only performing a partial link do not bother
7498 to construct any glue. */
7499 if (bfd_link_relocatable (link_info
))
7502 /* Here we have a bfd that is to be included on the link. We have a
7503 hook to do reloc rummaging, before section sizes are nailed down. */
7504 globals
= elf32_arm_hash_table (link_info
);
7505 BFD_ASSERT (globals
!= NULL
);
7507 check_use_blx (globals
);
7509 if (globals
->byteswap_code
&& !bfd_big_endian (abfd
))
7511 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
7516 /* PR 5398: If we have not decided to include any loadable sections in
7517 the output then we will not have a glue owner bfd. This is OK, it
7518 just means that there is nothing else for us to do here. */
7519 if (globals
->bfd_of_glue_owner
== NULL
)
7522 /* Rummage around all the relocs and map the glue vectors. */
7523 sec
= abfd
->sections
;
7528 for (; sec
!= NULL
; sec
= sec
->next
)
7530 if (sec
->reloc_count
== 0)
7533 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7536 symtab_hdr
= & elf_symtab_hdr (abfd
);
7538 /* Load the relocs. */
7540 = _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, FALSE
);
7542 if (internal_relocs
== NULL
)
7545 irelend
= internal_relocs
+ sec
->reloc_count
;
7546 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
7549 unsigned long r_index
;
7551 struct elf_link_hash_entry
*h
;
7553 r_type
= ELF32_R_TYPE (irel
->r_info
);
7554 r_index
= ELF32_R_SYM (irel
->r_info
);
7556 /* These are the only relocation types we care about. */
7557 if ( r_type
!= R_ARM_PC24
7558 && (r_type
!= R_ARM_V4BX
|| globals
->fix_v4bx
< 2))
7561 /* Get the section contents if we haven't done so already. */
7562 if (contents
== NULL
)
7564 /* Get cached copy if it exists. */
7565 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
7566 contents
= elf_section_data (sec
)->this_hdr
.contents
;
7569 /* Go get them off disk. */
7570 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
7575 if (r_type
== R_ARM_V4BX
)
7579 reg
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
) & 0xf;
7580 record_arm_bx_glue (link_info
, reg
);
7584 /* If the relocation is not against a symbol it cannot concern us. */
7587 /* We don't care about local symbols. */
7588 if (r_index
< symtab_hdr
->sh_info
)
7591 /* This is an external symbol. */
7592 r_index
-= symtab_hdr
->sh_info
;
7593 h
= (struct elf_link_hash_entry
*)
7594 elf_sym_hashes (abfd
)[r_index
];
7596 /* If the relocation is against a static symbol it must be within
7597 the current section and so cannot be a cross ARM/Thumb relocation. */
7601 /* If the call will go through a PLT entry then we do not need
7603 if (globals
->root
.splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
7609 /* This one is a call from arm code. We need to look up
7610 the target of the call. If it is a thumb target, we
7612 if (ARM_GET_SYM_BRANCH_TYPE (h
->target_internal
)
7613 == ST_BRANCH_TO_THUMB
)
7614 record_arm_to_thumb_glue (link_info
, h
);
7622 if (contents
!= NULL
7623 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
7627 if (internal_relocs
!= NULL
7628 && elf_section_data (sec
)->relocs
!= internal_relocs
)
7629 free (internal_relocs
);
7630 internal_relocs
= NULL
;
7636 if (contents
!= NULL
7637 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
7639 if (internal_relocs
!= NULL
7640 && elf_section_data (sec
)->relocs
!= internal_relocs
)
7641 free (internal_relocs
);
7648 /* Initialise maps of ARM/Thumb/data for input BFDs. */
7651 bfd_elf32_arm_init_maps (bfd
*abfd
)
7653 Elf_Internal_Sym
*isymbuf
;
7654 Elf_Internal_Shdr
*hdr
;
7655 unsigned int i
, localsyms
;
7657 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
7658 if (! is_arm_elf (abfd
))
7661 if ((abfd
->flags
& DYNAMIC
) != 0)
7664 hdr
= & elf_symtab_hdr (abfd
);
7665 localsyms
= hdr
->sh_info
;
7667 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
7668 should contain the number of local symbols, which should come before any
7669 global symbols. Mapping symbols are always local. */
7670 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
,
7673 /* No internal symbols read? Skip this BFD. */
7674 if (isymbuf
== NULL
)
7677 for (i
= 0; i
< localsyms
; i
++)
7679 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
7680 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
7684 && ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
7686 name
= bfd_elf_string_from_elf_section (abfd
,
7687 hdr
->sh_link
, isym
->st_name
);
7689 if (bfd_is_arm_special_symbol_name (name
,
7690 BFD_ARM_SPECIAL_SYM_TYPE_MAP
))
7691 elf32_arm_section_map_add (sec
, name
[1], isym
->st_value
);
7697 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
7698 say what they wanted. */
7701 bfd_elf32_arm_set_cortex_a8_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
7703 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
7704 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
7706 if (globals
== NULL
)
7709 if (globals
->fix_cortex_a8
== -1)
7711 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
7712 if (out_attr
[Tag_CPU_arch
].i
== TAG_CPU_ARCH_V7
7713 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
7714 || out_attr
[Tag_CPU_arch_profile
].i
== 0))
7715 globals
->fix_cortex_a8
= 1;
7717 globals
->fix_cortex_a8
= 0;
7723 bfd_elf32_arm_set_vfp11_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
7725 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
7726 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
7728 if (globals
== NULL
)
7730 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
7731 if (out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V7
)
7733 switch (globals
->vfp11_fix
)
7735 case BFD_ARM_VFP11_FIX_DEFAULT
:
7736 case BFD_ARM_VFP11_FIX_NONE
:
7737 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
7741 /* Give a warning, but do as the user requests anyway. */
7742 _bfd_error_handler (_("%B: warning: selected VFP11 erratum "
7743 "workaround is not necessary for target architecture"), obfd
);
7746 else if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_DEFAULT
)
7747 /* For earlier architectures, we might need the workaround, but do not
7748 enable it by default. If users is running with broken hardware, they
7749 must enable the erratum fix explicitly. */
7750 globals
->vfp11_fix
= BFD_ARM_VFP11_FIX_NONE
;
7754 bfd_elf32_arm_set_stm32l4xx_fix (bfd
*obfd
, struct bfd_link_info
*link_info
)
7756 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
7757 obj_attribute
*out_attr
= elf_known_obj_attributes_proc (obfd
);
7759 if (globals
== NULL
)
7762 /* We assume only Cortex-M4 may require the fix. */
7763 if (out_attr
[Tag_CPU_arch
].i
!= TAG_CPU_ARCH_V7E_M
7764 || out_attr
[Tag_CPU_arch_profile
].i
!= 'M')
7766 if (globals
->stm32l4xx_fix
!= BFD_ARM_STM32L4XX_FIX_NONE
)
7767 /* Give a warning, but do as the user requests anyway. */
7769 (_("%B: warning: selected STM32L4XX erratum "
7770 "workaround is not necessary for target architecture"), obfd
);
7774 enum bfd_arm_vfp11_pipe
7782 /* Return a VFP register number. This is encoded as RX:X for single-precision
7783 registers, or X:RX for double-precision registers, where RX is the group of
7784 four bits in the instruction encoding and X is the single extension bit.
7785 RX and X fields are specified using their lowest (starting) bit. The return
7788 0...31: single-precision registers s0...s31
7789 32...63: double-precision registers d0...d31.
7791 Although X should be zero for VFP11 (encoding d0...d15 only), we might
7792 encounter VFP3 instructions, so we allow the full range for DP registers. */
7795 bfd_arm_vfp11_regno (unsigned int insn
, bfd_boolean is_double
, unsigned int rx
,
7799 return (((insn
>> rx
) & 0xf) | (((insn
>> x
) & 1) << 4)) + 32;
7801 return (((insn
>> rx
) & 0xf) << 1) | ((insn
>> x
) & 1);
7804 /* Set bits in *WMASK according to a register number REG as encoded by
7805 bfd_arm_vfp11_regno(). Ignore d16-d31. */
7808 bfd_arm_vfp11_write_mask (unsigned int *wmask
, unsigned int reg
)
7813 *wmask
|= 3 << ((reg
- 32) * 2);
7816 /* Return TRUE if WMASK overwrites anything in REGS. */
7819 bfd_arm_vfp11_antidependency (unsigned int wmask
, int *regs
, int numregs
)
7823 for (i
= 0; i
< numregs
; i
++)
7825 unsigned int reg
= regs
[i
];
7827 if (reg
< 32 && (wmask
& (1 << reg
)) != 0)
7835 if ((wmask
& (3 << (reg
* 2))) != 0)
7842 /* In this function, we're interested in two things: finding input registers
7843 for VFP data-processing instructions, and finding the set of registers which
7844 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
7845 hold the written set, so FLDM etc. are easy to deal with (we're only
7846 interested in 32 SP registers or 16 dp registers, due to the VFP version
7847 implemented by the chip in question). DP registers are marked by setting
7848 both SP registers in the write mask). */
7850 static enum bfd_arm_vfp11_pipe
7851 bfd_arm_vfp11_insn_decode (unsigned int insn
, unsigned int *destmask
, int *regs
,
7854 enum bfd_arm_vfp11_pipe vpipe
= VFP11_BAD
;
7855 bfd_boolean is_double
= ((insn
& 0xf00) == 0xb00) ? 1 : 0;
7857 if ((insn
& 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
7860 unsigned int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
7861 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
7863 pqrs
= ((insn
& 0x00800000) >> 20)
7864 | ((insn
& 0x00300000) >> 19)
7865 | ((insn
& 0x00000040) >> 6);
7869 case 0: /* fmac[sd]. */
7870 case 1: /* fnmac[sd]. */
7871 case 2: /* fmsc[sd]. */
7872 case 3: /* fnmsc[sd]. */
7874 bfd_arm_vfp11_write_mask (destmask
, fd
);
7876 regs
[1] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
7881 case 4: /* fmul[sd]. */
7882 case 5: /* fnmul[sd]. */
7883 case 6: /* fadd[sd]. */
7884 case 7: /* fsub[sd]. */
7888 case 8: /* fdiv[sd]. */
7891 bfd_arm_vfp11_write_mask (destmask
, fd
);
7892 regs
[0] = bfd_arm_vfp11_regno (insn
, is_double
, 16, 7); /* Fn. */
7897 case 15: /* extended opcode. */
7899 unsigned int extn
= ((insn
>> 15) & 0x1e)
7900 | ((insn
>> 7) & 1);
7904 case 0: /* fcpy[sd]. */
7905 case 1: /* fabs[sd]. */
7906 case 2: /* fneg[sd]. */
7907 case 8: /* fcmp[sd]. */
7908 case 9: /* fcmpe[sd]. */
7909 case 10: /* fcmpz[sd]. */
7910 case 11: /* fcmpez[sd]. */
7911 case 16: /* fuito[sd]. */
7912 case 17: /* fsito[sd]. */
7913 case 24: /* ftoui[sd]. */
7914 case 25: /* ftouiz[sd]. */
7915 case 26: /* ftosi[sd]. */
7916 case 27: /* ftosiz[sd]. */
7917 /* These instructions will not bounce due to underflow. */
7922 case 3: /* fsqrt[sd]. */
7923 /* fsqrt cannot underflow, but it can (perhaps) overwrite
7924 registers to cause the erratum in previous instructions. */
7925 bfd_arm_vfp11_write_mask (destmask
, fd
);
7929 case 15: /* fcvt{ds,sd}. */
7933 bfd_arm_vfp11_write_mask (destmask
, fd
);
7935 /* Only FCVTSD can underflow. */
7936 if ((insn
& 0x100) != 0)
7955 /* Two-register transfer. */
7956 else if ((insn
& 0x0fe00ed0) == 0x0c400a10)
7958 unsigned int fm
= bfd_arm_vfp11_regno (insn
, is_double
, 0, 5);
7960 if ((insn
& 0x100000) == 0)
7963 bfd_arm_vfp11_write_mask (destmask
, fm
);
7966 bfd_arm_vfp11_write_mask (destmask
, fm
);
7967 bfd_arm_vfp11_write_mask (destmask
, fm
+ 1);
7973 else if ((insn
& 0x0e100e00) == 0x0c100a00) /* A load insn. */
7975 int fd
= bfd_arm_vfp11_regno (insn
, is_double
, 12, 22);
7976 unsigned int puw
= ((insn
>> 21) & 0x1) | (((insn
>> 23) & 3) << 1);
7980 case 0: /* Two-reg transfer. We should catch these above. */
7983 case 2: /* fldm[sdx]. */
7987 unsigned int i
, offset
= insn
& 0xff;
7992 for (i
= fd
; i
< fd
+ offset
; i
++)
7993 bfd_arm_vfp11_write_mask (destmask
, i
);
7997 case 4: /* fld[sd]. */
7999 bfd_arm_vfp11_write_mask (destmask
, fd
);
8008 /* Single-register transfer. Note L==0. */
8009 else if ((insn
& 0x0f100e10) == 0x0e000a10)
8011 unsigned int opcode
= (insn
>> 21) & 7;
8012 unsigned int fn
= bfd_arm_vfp11_regno (insn
, is_double
, 16, 7);
8016 case 0: /* fmsr/fmdlr. */
8017 case 1: /* fmdhr. */
8018 /* Mark fmdhr and fmdlr as writing to the whole of the DP
8019 destination register. I don't know if this is exactly right,
8020 but it is the conservative choice. */
8021 bfd_arm_vfp11_write_mask (destmask
, fn
);
8035 static int elf32_arm_compare_mapping (const void * a
, const void * b
);
8038 /* Look for potentially-troublesome code sequences which might trigger the
8039 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
8040 (available from ARM) for details of the erratum. A short version is
8041 described in ld.texinfo. */
8044 bfd_elf32_arm_vfp11_erratum_scan (bfd
*abfd
, struct bfd_link_info
*link_info
)
8047 bfd_byte
*contents
= NULL
;
8049 int regs
[3], numregs
= 0;
8050 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
8051 int use_vector
= (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_VECTOR
);
8053 if (globals
== NULL
)
8056 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
8057 The states transition as follows:
8059 0 -> 1 (vector) or 0 -> 2 (scalar)
8060 A VFP FMAC-pipeline instruction has been seen. Fill
8061 regs[0]..regs[numregs-1] with its input operands. Remember this
8062 instruction in 'first_fmac'.
8065 Any instruction, except for a VFP instruction which overwrites
8070 A VFP instruction has been seen which overwrites any of regs[*].
8071 We must make a veneer! Reset state to 0 before examining next
8075 If we fail to match anything in state 2, reset to state 0 and reset
8076 the instruction pointer to the instruction after 'first_fmac'.
8078 If the VFP11 vector mode is in use, there must be at least two unrelated
8079 instructions between anti-dependent VFP11 instructions to properly avoid
8080 triggering the erratum, hence the use of the extra state 1. */
8082 /* If we are only performing a partial link do not bother
8083 to construct any glue. */
8084 if (bfd_link_relocatable (link_info
))
8087 /* Skip if this bfd does not correspond to an ELF image. */
8088 if (! is_arm_elf (abfd
))
8091 /* We should have chosen a fix type by the time we get here. */
8092 BFD_ASSERT (globals
->vfp11_fix
!= BFD_ARM_VFP11_FIX_DEFAULT
);
8094 if (globals
->vfp11_fix
== BFD_ARM_VFP11_FIX_NONE
)
8097 /* Skip this BFD if it corresponds to an executable or dynamic object. */
8098 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
8101 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
8103 unsigned int i
, span
, first_fmac
= 0, veneer_of_insn
= 0;
8104 struct _arm_elf_section_data
*sec_data
;
8106 /* If we don't have executable progbits, we're not interested in this
8107 section. Also skip if section is to be excluded. */
8108 if (elf_section_type (sec
) != SHT_PROGBITS
8109 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
8110 || (sec
->flags
& SEC_EXCLUDE
) != 0
8111 || sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
8112 || sec
->output_section
== bfd_abs_section_ptr
8113 || strcmp (sec
->name
, VFP11_ERRATUM_VENEER_SECTION_NAME
) == 0)
8116 sec_data
= elf32_arm_section_data (sec
);
8118 if (sec_data
->mapcount
== 0)
8121 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
8122 contents
= elf_section_data (sec
)->this_hdr
.contents
;
8123 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
8126 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
8127 elf32_arm_compare_mapping
);
8129 for (span
= 0; span
< sec_data
->mapcount
; span
++)
8131 unsigned int span_start
= sec_data
->map
[span
].vma
;
8132 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
8133 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
8134 char span_type
= sec_data
->map
[span
].type
;
8136 /* FIXME: Only ARM mode is supported at present. We may need to
8137 support Thumb-2 mode also at some point. */
8138 if (span_type
!= 'a')
8141 for (i
= span_start
; i
< span_end
;)
8143 unsigned int next_i
= i
+ 4;
8144 unsigned int insn
= bfd_big_endian (abfd
)
8145 ? (contents
[i
] << 24)
8146 | (contents
[i
+ 1] << 16)
8147 | (contents
[i
+ 2] << 8)
8149 : (contents
[i
+ 3] << 24)
8150 | (contents
[i
+ 2] << 16)
8151 | (contents
[i
+ 1] << 8)
8153 unsigned int writemask
= 0;
8154 enum bfd_arm_vfp11_pipe vpipe
;
8159 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
, regs
,
8161 /* I'm assuming the VFP11 erratum can trigger with denorm
8162 operands on either the FMAC or the DS pipeline. This might
8163 lead to slightly overenthusiastic veneer insertion. */
8164 if (vpipe
== VFP11_FMAC
|| vpipe
== VFP11_DS
)
8166 state
= use_vector
? 1 : 2;
8168 veneer_of_insn
= insn
;
8174 int other_regs
[3], other_numregs
;
8175 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
8178 if (vpipe
!= VFP11_BAD
8179 && bfd_arm_vfp11_antidependency (writemask
, regs
,
8189 int other_regs
[3], other_numregs
;
8190 vpipe
= bfd_arm_vfp11_insn_decode (insn
, &writemask
,
8193 if (vpipe
!= VFP11_BAD
8194 && bfd_arm_vfp11_antidependency (writemask
, regs
,
8200 next_i
= first_fmac
+ 4;
8206 abort (); /* Should be unreachable. */
8211 elf32_vfp11_erratum_list
*newerr
=(elf32_vfp11_erratum_list
*)
8212 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list
));
8214 elf32_arm_section_data (sec
)->erratumcount
+= 1;
8216 newerr
->u
.b
.vfp_insn
= veneer_of_insn
;
8221 newerr
->type
= VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
;
8228 record_vfp11_erratum_veneer (link_info
, newerr
, abfd
, sec
,
8233 newerr
->next
= sec_data
->erratumlist
;
8234 sec_data
->erratumlist
= newerr
;
8243 if (contents
!= NULL
8244 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
8252 if (contents
!= NULL
8253 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
8259 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
8260 after sections have been laid out, using specially-named symbols. */
8263 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd
*abfd
,
8264 struct bfd_link_info
*link_info
)
8267 struct elf32_arm_link_hash_table
*globals
;
8270 if (bfd_link_relocatable (link_info
))
8273 /* Skip if this bfd does not correspond to an ELF image. */
8274 if (! is_arm_elf (abfd
))
8277 globals
= elf32_arm_hash_table (link_info
);
8278 if (globals
== NULL
)
8281 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
8282 (VFP11_ERRATUM_VENEER_ENTRY_NAME
) + 10);
8284 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
8286 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
8287 elf32_vfp11_erratum_list
*errnode
= sec_data
->erratumlist
;
8289 for (; errnode
!= NULL
; errnode
= errnode
->next
)
8291 struct elf_link_hash_entry
*myh
;
8294 switch (errnode
->type
)
8296 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
8297 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER
:
8298 /* Find veneer symbol. */
8299 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
,
8300 errnode
->u
.b
.veneer
->u
.v
.id
);
8302 myh
= elf_link_hash_lookup
8303 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
8306 _bfd_error_handler (_("%B: unable to find VFP11 veneer "
8307 "`%s'"), abfd
, tmp_name
);
8309 vma
= myh
->root
.u
.def
.section
->output_section
->vma
8310 + myh
->root
.u
.def
.section
->output_offset
8311 + myh
->root
.u
.def
.value
;
8313 errnode
->u
.b
.veneer
->vma
= vma
;
8316 case VFP11_ERRATUM_ARM_VENEER
:
8317 case VFP11_ERRATUM_THUMB_VENEER
:
8318 /* Find return location. */
8319 sprintf (tmp_name
, VFP11_ERRATUM_VENEER_ENTRY_NAME
"_r",
8322 myh
= elf_link_hash_lookup
8323 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
8326 _bfd_error_handler (_("%B: unable to find VFP11 veneer "
8327 "`%s'"), abfd
, tmp_name
);
8329 vma
= myh
->root
.u
.def
.section
->output_section
->vma
8330 + myh
->root
.u
.def
.section
->output_offset
8331 + myh
->root
.u
.def
.value
;
8333 errnode
->u
.v
.branch
->vma
= vma
;
8345 /* Find virtual-memory addresses for STM32L4XX erratum veneers and
8346 return locations after sections have been laid out, using
8347 specially-named symbols. */
8350 bfd_elf32_arm_stm32l4xx_fix_veneer_locations (bfd
*abfd
,
8351 struct bfd_link_info
*link_info
)
8354 struct elf32_arm_link_hash_table
*globals
;
8357 if (bfd_link_relocatable (link_info
))
8360 /* Skip if this bfd does not correspond to an ELF image. */
8361 if (! is_arm_elf (abfd
))
8364 globals
= elf32_arm_hash_table (link_info
);
8365 if (globals
== NULL
)
8368 tmp_name
= (char *) bfd_malloc ((bfd_size_type
) strlen
8369 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME
) + 10);
8371 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
8373 struct _arm_elf_section_data
*sec_data
= elf32_arm_section_data (sec
);
8374 elf32_stm32l4xx_erratum_list
*errnode
= sec_data
->stm32l4xx_erratumlist
;
8376 for (; errnode
!= NULL
; errnode
= errnode
->next
)
8378 struct elf_link_hash_entry
*myh
;
8381 switch (errnode
->type
)
8383 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER
:
8384 /* Find veneer symbol. */
8385 sprintf (tmp_name
, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME
,
8386 errnode
->u
.b
.veneer
->u
.v
.id
);
8388 myh
= elf_link_hash_lookup
8389 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
8392 _bfd_error_handler (_("%B: unable to find STM32L4XX veneer "
8393 "`%s'"), abfd
, tmp_name
);
8395 vma
= myh
->root
.u
.def
.section
->output_section
->vma
8396 + myh
->root
.u
.def
.section
->output_offset
8397 + myh
->root
.u
.def
.value
;
8399 errnode
->u
.b
.veneer
->vma
= vma
;
8402 case STM32L4XX_ERRATUM_VENEER
:
8403 /* Find return location. */
8404 sprintf (tmp_name
, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME
"_r",
8407 myh
= elf_link_hash_lookup
8408 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
8411 _bfd_error_handler (_("%B: unable to find STM32L4XX veneer "
8412 "`%s'"), abfd
, tmp_name
);
8414 vma
= myh
->root
.u
.def
.section
->output_section
->vma
8415 + myh
->root
.u
.def
.section
->output_offset
8416 + myh
->root
.u
.def
.value
;
8418 errnode
->u
.v
.branch
->vma
= vma
;
8430 static inline bfd_boolean
8431 is_thumb2_ldmia (const insn32 insn
)
8433 /* Encoding T2: LDM<c>.W <Rn>{!},<registers>
8434 1110 - 1000 - 10W1 - rrrr - PM (0) l - llll - llll - llll. */
8435 return (insn
& 0xffd02000) == 0xe8900000;
8438 static inline bfd_boolean
8439 is_thumb2_ldmdb (const insn32 insn
)
8441 /* Encoding T1: LDMDB<c> <Rn>{!},<registers>
8442 1110 - 1001 - 00W1 - rrrr - PM (0) l - llll - llll - llll. */
8443 return (insn
& 0xffd02000) == 0xe9100000;
8446 static inline bfd_boolean
8447 is_thumb2_vldm (const insn32 insn
)
8449 /* A6.5 Extension register load or store instruction
8451 We look for SP 32-bit and DP 64-bit registers.
8452 Encoding T1 VLDM{mode}<c> <Rn>{!}, <list>
8453 <list> is consecutive 64-bit registers
8454 1110 - 110P - UDW1 - rrrr - vvvv - 1011 - iiii - iiii
8455 Encoding T2 VLDM{mode}<c> <Rn>{!}, <list>
8456 <list> is consecutive 32-bit registers
8457 1110 - 110P - UDW1 - rrrr - vvvv - 1010 - iiii - iiii
8458 if P==0 && U==1 && W==1 && Rn=1101 VPOP
8459 if PUW=010 || PUW=011 || PUW=101 VLDM. */
8461 (((insn
& 0xfe100f00) == 0xec100b00) ||
8462 ((insn
& 0xfe100f00) == 0xec100a00))
8463 && /* (IA without !). */
8464 (((((insn
<< 7) >> 28) & 0xd) == 0x4)
8465 /* (IA with !), includes VPOP (when reg number is SP). */
8466 || ((((insn
<< 7) >> 28) & 0xd) == 0x5)
8468 || ((((insn
<< 7) >> 28) & 0xd) == 0x9));
8471 /* STM STM32L4XX erratum : This function assumes that it receives an LDM or
8473 - computes the number and the mode of memory accesses
8474 - decides if the replacement should be done:
8475 . replaces only if > 8-word accesses
8476 . or (testing purposes only) replaces all accesses. */
8479 stm32l4xx_need_create_replacing_stub (const insn32 insn
,
8480 bfd_arm_stm32l4xx_fix stm32l4xx_fix
)
8484 /* The field encoding the register list is the same for both LDMIA
8485 and LDMDB encodings. */
8486 if (is_thumb2_ldmia (insn
) || is_thumb2_ldmdb (insn
))
8487 nb_words
= elf32_arm_popcount (insn
& 0x0000ffff);
8488 else if (is_thumb2_vldm (insn
))
8489 nb_words
= (insn
& 0xff);
8491 /* DEFAULT mode accounts for the real bug condition situation,
8492 ALL mode inserts stubs for each LDM/VLDM instruction (testing). */
8494 (stm32l4xx_fix
== BFD_ARM_STM32L4XX_FIX_DEFAULT
) ? nb_words
> 8 :
8495 (stm32l4xx_fix
== BFD_ARM_STM32L4XX_FIX_ALL
) ? TRUE
: FALSE
;
8498 /* Look for potentially-troublesome code sequences which might trigger
8499 the STM STM32L4XX erratum. */
8502 bfd_elf32_arm_stm32l4xx_erratum_scan (bfd
*abfd
,
8503 struct bfd_link_info
*link_info
)
8506 bfd_byte
*contents
= NULL
;
8507 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
8509 if (globals
== NULL
)
8512 /* If we are only performing a partial link do not bother
8513 to construct any glue. */
8514 if (bfd_link_relocatable (link_info
))
8517 /* Skip if this bfd does not correspond to an ELF image. */
8518 if (! is_arm_elf (abfd
))
8521 if (globals
->stm32l4xx_fix
== BFD_ARM_STM32L4XX_FIX_NONE
)
8524 /* Skip this BFD if it corresponds to an executable or dynamic object. */
8525 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
8528 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
8530 unsigned int i
, span
;
8531 struct _arm_elf_section_data
*sec_data
;
8533 /* If we don't have executable progbits, we're not interested in this
8534 section. Also skip if section is to be excluded. */
8535 if (elf_section_type (sec
) != SHT_PROGBITS
8536 || (elf_section_flags (sec
) & SHF_EXECINSTR
) == 0
8537 || (sec
->flags
& SEC_EXCLUDE
) != 0
8538 || sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
8539 || sec
->output_section
== bfd_abs_section_ptr
8540 || strcmp (sec
->name
, STM32L4XX_ERRATUM_VENEER_SECTION_NAME
) == 0)
8543 sec_data
= elf32_arm_section_data (sec
);
8545 if (sec_data
->mapcount
== 0)
8548 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
8549 contents
= elf_section_data (sec
)->this_hdr
.contents
;
8550 else if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
8553 qsort (sec_data
->map
, sec_data
->mapcount
, sizeof (elf32_arm_section_map
),
8554 elf32_arm_compare_mapping
);
8556 for (span
= 0; span
< sec_data
->mapcount
; span
++)
8558 unsigned int span_start
= sec_data
->map
[span
].vma
;
8559 unsigned int span_end
= (span
== sec_data
->mapcount
- 1)
8560 ? sec
->size
: sec_data
->map
[span
+ 1].vma
;
8561 char span_type
= sec_data
->map
[span
].type
;
8562 int itblock_current_pos
= 0;
8564 /* Only Thumb2 mode need be supported with this CM4 specific
8565 code, we should not encounter any arm mode eg span_type
8567 if (span_type
!= 't')
8570 for (i
= span_start
; i
< span_end
;)
8572 unsigned int insn
= bfd_get_16 (abfd
, &contents
[i
]);
8573 bfd_boolean insn_32bit
= FALSE
;
8574 bfd_boolean is_ldm
= FALSE
;
8575 bfd_boolean is_vldm
= FALSE
;
8576 bfd_boolean is_not_last_in_it_block
= FALSE
;
8578 /* The first 16-bits of all 32-bit thumb2 instructions start
8579 with opcode[15..13]=0b111 and the encoded op1 can be anything
8580 except opcode[12..11]!=0b00.
8581 See 32-bit Thumb instruction encoding. */
8582 if ((insn
& 0xe000) == 0xe000 && (insn
& 0x1800) != 0x0000)
8585 /* Compute the predicate that tells if the instruction
8586 is concerned by the IT block
8587 - Creates an error if there is a ldm that is not
8588 last in the IT block thus cannot be replaced
8589 - Otherwise we can create a branch at the end of the
8590 IT block, it will be controlled naturally by IT
8591 with the proper pseudo-predicate
8592 - So the only interesting predicate is the one that
8593 tells that we are not on the last item of an IT
8595 if (itblock_current_pos
!= 0)
8596 is_not_last_in_it_block
= !!--itblock_current_pos
;
8600 /* Load the rest of the insn (in manual-friendly order). */
8601 insn
= (insn
<< 16) | bfd_get_16 (abfd
, &contents
[i
+ 2]);
8602 is_ldm
= is_thumb2_ldmia (insn
) || is_thumb2_ldmdb (insn
);
8603 is_vldm
= is_thumb2_vldm (insn
);
8605 /* Veneers are created for (v)ldm depending on
8606 option flags and memory accesses conditions; but
8607 if the instruction is not the last instruction of
8608 an IT block, we cannot create a jump there, so we
8610 if ((is_ldm
|| is_vldm
)
8611 && stm32l4xx_need_create_replacing_stub
8612 (insn
, globals
->stm32l4xx_fix
))
8614 if (is_not_last_in_it_block
)
8617 /* xgettext:c-format */
8618 (_("%B(%A+%#x): error: multiple load detected"
8619 " in non-last IT block instruction :"
8620 " STM32L4XX veneer cannot be generated.\n"
8621 "Use gcc option -mrestrict-it to generate"
8622 " only one instruction per IT block.\n"),
8627 elf32_stm32l4xx_erratum_list
*newerr
=
8628 (elf32_stm32l4xx_erratum_list
*)
8630 (sizeof (elf32_stm32l4xx_erratum_list
));
8632 elf32_arm_section_data (sec
)
8633 ->stm32l4xx_erratumcount
+= 1;
8634 newerr
->u
.b
.insn
= insn
;
8635 /* We create only thumb branches. */
8637 STM32L4XX_ERRATUM_BRANCH_TO_VENEER
;
8638 record_stm32l4xx_erratum_veneer
8639 (link_info
, newerr
, abfd
, sec
,
8642 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
:
8643 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE
);
8645 newerr
->next
= sec_data
->stm32l4xx_erratumlist
;
8646 sec_data
->stm32l4xx_erratumlist
= newerr
;
8653 IT blocks are only encoded in T1
8654 Encoding T1: IT{x{y{z}}} <firstcond>
8655 1 0 1 1 - 1 1 1 1 - firstcond - mask
8656 if mask = '0000' then see 'related encodings'
8657 We don't deal with UNPREDICTABLE, just ignore these.
8658 There can be no nested IT blocks so an IT block
8659 is naturally a new one for which it is worth
8660 computing its size. */
8661 bfd_boolean is_newitblock
= ((insn
& 0xff00) == 0xbf00)
8662 && ((insn
& 0x000f) != 0x0000);
8663 /* If we have a new IT block we compute its size. */
8666 /* Compute the number of instructions controlled
8667 by the IT block, it will be used to decide
8668 whether we are inside an IT block or not. */
8669 unsigned int mask
= insn
& 0x000f;
8670 itblock_current_pos
= 4 - ctz (mask
);
8674 i
+= insn_32bit
? 4 : 2;
8678 if (contents
!= NULL
8679 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
8687 if (contents
!= NULL
8688 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
8694 /* Set target relocation values needed during linking. */
8697 bfd_elf32_arm_set_target_params (struct bfd
*output_bfd
,
8698 struct bfd_link_info
*link_info
,
8699 struct elf32_arm_params
*params
)
8701 struct elf32_arm_link_hash_table
*globals
;
8703 globals
= elf32_arm_hash_table (link_info
);
8704 if (globals
== NULL
)
8707 globals
->target1_is_rel
= params
->target1_is_rel
;
8708 if (strcmp (params
->target2_type
, "rel") == 0)
8709 globals
->target2_reloc
= R_ARM_REL32
;
8710 else if (strcmp (params
->target2_type
, "abs") == 0)
8711 globals
->target2_reloc
= R_ARM_ABS32
;
8712 else if (strcmp (params
->target2_type
, "got-rel") == 0)
8713 globals
->target2_reloc
= R_ARM_GOT_PREL
;
8716 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
8717 params
->target2_type
);
8719 globals
->fix_v4bx
= params
->fix_v4bx
;
8720 globals
->use_blx
|= params
->use_blx
;
8721 globals
->vfp11_fix
= params
->vfp11_denorm_fix
;
8722 globals
->stm32l4xx_fix
= params
->stm32l4xx_fix
;
8723 globals
->pic_veneer
= params
->pic_veneer
;
8724 globals
->fix_cortex_a8
= params
->fix_cortex_a8
;
8725 globals
->fix_arm1176
= params
->fix_arm1176
;
8726 globals
->cmse_implib
= params
->cmse_implib
;
8727 globals
->in_implib_bfd
= params
->in_implib_bfd
;
8729 BFD_ASSERT (is_arm_elf (output_bfd
));
8730 elf_arm_tdata (output_bfd
)->no_enum_size_warning
8731 = params
->no_enum_size_warning
;
8732 elf_arm_tdata (output_bfd
)->no_wchar_size_warning
8733 = params
->no_wchar_size_warning
;
8736 /* Replace the target offset of a Thumb bl or b.w instruction. */
8739 insert_thumb_branch (bfd
*abfd
, long int offset
, bfd_byte
*insn
)
8745 BFD_ASSERT ((offset
& 1) == 0);
8747 upper
= bfd_get_16 (abfd
, insn
);
8748 lower
= bfd_get_16 (abfd
, insn
+ 2);
8749 reloc_sign
= (offset
< 0) ? 1 : 0;
8750 upper
= (upper
& ~(bfd_vma
) 0x7ff)
8751 | ((offset
>> 12) & 0x3ff)
8752 | (reloc_sign
<< 10);
8753 lower
= (lower
& ~(bfd_vma
) 0x2fff)
8754 | (((!((offset
>> 23) & 1)) ^ reloc_sign
) << 13)
8755 | (((!((offset
>> 22) & 1)) ^ reloc_sign
) << 11)
8756 | ((offset
>> 1) & 0x7ff);
8757 bfd_put_16 (abfd
, upper
, insn
);
8758 bfd_put_16 (abfd
, lower
, insn
+ 2);
8761 /* Thumb code calling an ARM function. */
8764 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
8768 asection
* input_section
,
8769 bfd_byte
* hit_data
,
8772 bfd_signed_vma addend
,
8774 char **error_message
)
8778 long int ret_offset
;
8779 struct elf_link_hash_entry
* myh
;
8780 struct elf32_arm_link_hash_table
* globals
;
8782 myh
= find_thumb_glue (info
, name
, error_message
);
8786 globals
= elf32_arm_hash_table (info
);
8787 BFD_ASSERT (globals
!= NULL
);
8788 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
8790 my_offset
= myh
->root
.u
.def
.value
;
8792 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
8793 THUMB2ARM_GLUE_SECTION_NAME
);
8795 BFD_ASSERT (s
!= NULL
);
8796 BFD_ASSERT (s
->contents
!= NULL
);
8797 BFD_ASSERT (s
->output_section
!= NULL
);
8799 if ((my_offset
& 0x01) == 0x01)
8802 && sym_sec
->owner
!= NULL
8803 && !INTERWORK_FLAG (sym_sec
->owner
))
8806 (_("%B(%s): warning: interworking not enabled.\n"
8807 " first occurrence: %B: Thumb call to ARM"),
8808 sym_sec
->owner
, name
, input_bfd
);
8814 myh
->root
.u
.def
.value
= my_offset
;
8816 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
8817 s
->contents
+ my_offset
);
8819 put_thumb_insn (globals
, output_bfd
, (bfd_vma
) t2a2_noop_insn
,
8820 s
->contents
+ my_offset
+ 2);
8823 /* Address of destination of the stub. */
8824 ((bfd_signed_vma
) val
)
8826 /* Offset from the start of the current section
8827 to the start of the stubs. */
8829 /* Offset of the start of this stub from the start of the stubs. */
8831 /* Address of the start of the current section. */
8832 + s
->output_section
->vma
)
8833 /* The branch instruction is 4 bytes into the stub. */
8835 /* ARM branches work from the pc of the instruction + 8. */
8838 put_arm_insn (globals
, output_bfd
,
8839 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
8840 s
->contents
+ my_offset
+ 4);
8843 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
8845 /* Now go back and fix up the original BL insn to point to here. */
8847 /* Address of where the stub is located. */
8848 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
8849 /* Address of where the BL is located. */
8850 - (input_section
->output_section
->vma
+ input_section
->output_offset
8852 /* Addend in the relocation. */
8854 /* Biassing for PC-relative addressing. */
8857 insert_thumb_branch (input_bfd
, ret_offset
, hit_data
- input_section
->vma
);
8862 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
8864 static struct elf_link_hash_entry
*
8865 elf32_arm_create_thumb_stub (struct bfd_link_info
* info
,
8872 char ** error_message
)
8875 long int ret_offset
;
8876 struct elf_link_hash_entry
* myh
;
8877 struct elf32_arm_link_hash_table
* globals
;
8879 myh
= find_arm_glue (info
, name
, error_message
);
8883 globals
= elf32_arm_hash_table (info
);
8884 BFD_ASSERT (globals
!= NULL
);
8885 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
8887 my_offset
= myh
->root
.u
.def
.value
;
8889 if ((my_offset
& 0x01) == 0x01)
8892 && sym_sec
->owner
!= NULL
8893 && !INTERWORK_FLAG (sym_sec
->owner
))
8896 (_("%B(%s): warning: interworking not enabled.\n"
8897 " first occurrence: %B: arm call to thumb"),
8898 sym_sec
->owner
, name
, input_bfd
);
8902 myh
->root
.u
.def
.value
= my_offset
;
8904 if (bfd_link_pic (info
)
8905 || globals
->root
.is_relocatable_executable
8906 || globals
->pic_veneer
)
8908 /* For relocatable objects we can't use absolute addresses,
8909 so construct the address from a relative offset. */
8910 /* TODO: If the offset is small it's probably worth
8911 constructing the address with adds. */
8912 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1p_ldr_insn
,
8913 s
->contents
+ my_offset
);
8914 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2p_add_pc_insn
,
8915 s
->contents
+ my_offset
+ 4);
8916 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t3p_bx_r12_insn
,
8917 s
->contents
+ my_offset
+ 8);
8918 /* Adjust the offset by 4 for the position of the add,
8919 and 8 for the pipeline offset. */
8920 ret_offset
= (val
- (s
->output_offset
8921 + s
->output_section
->vma
8924 bfd_put_32 (output_bfd
, ret_offset
,
8925 s
->contents
+ my_offset
+ 12);
8927 else if (globals
->use_blx
)
8929 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1v5_ldr_insn
,
8930 s
->contents
+ my_offset
);
8932 /* It's a thumb address. Add the low order bit. */
8933 bfd_put_32 (output_bfd
, val
| a2t2v5_func_addr_insn
,
8934 s
->contents
+ my_offset
+ 4);
8938 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
8939 s
->contents
+ my_offset
);
8941 put_arm_insn (globals
, output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
8942 s
->contents
+ my_offset
+ 4);
8944 /* It's a thumb address. Add the low order bit. */
8945 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
8946 s
->contents
+ my_offset
+ 8);
8952 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
8957 /* Arm code calling a Thumb function. */
8960 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
8964 asection
* input_section
,
8965 bfd_byte
* hit_data
,
8968 bfd_signed_vma addend
,
8970 char **error_message
)
8972 unsigned long int tmp
;
8975 long int ret_offset
;
8976 struct elf_link_hash_entry
* myh
;
8977 struct elf32_arm_link_hash_table
* globals
;
8979 globals
= elf32_arm_hash_table (info
);
8980 BFD_ASSERT (globals
!= NULL
);
8981 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
8983 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
8984 ARM2THUMB_GLUE_SECTION_NAME
);
8985 BFD_ASSERT (s
!= NULL
);
8986 BFD_ASSERT (s
->contents
!= NULL
);
8987 BFD_ASSERT (s
->output_section
!= NULL
);
8989 myh
= elf32_arm_create_thumb_stub (info
, name
, input_bfd
, output_bfd
,
8990 sym_sec
, val
, s
, error_message
);
8994 my_offset
= myh
->root
.u
.def
.value
;
8995 tmp
= bfd_get_32 (input_bfd
, hit_data
);
8996 tmp
= tmp
& 0xFF000000;
8998 /* Somehow these are both 4 too far, so subtract 8. */
8999 ret_offset
= (s
->output_offset
9001 + s
->output_section
->vma
9002 - (input_section
->output_offset
9003 + input_section
->output_section
->vma
9007 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
9009 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
9014 /* Populate Arm stub for an exported Thumb function. */
9017 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry
*h
, void * inf
)
9019 struct bfd_link_info
* info
= (struct bfd_link_info
*) inf
;
9021 struct elf_link_hash_entry
* myh
;
9022 struct elf32_arm_link_hash_entry
*eh
;
9023 struct elf32_arm_link_hash_table
* globals
;
9026 char *error_message
;
9028 eh
= elf32_arm_hash_entry (h
);
9029 /* Allocate stubs for exported Thumb functions on v4t. */
9030 if (eh
->export_glue
== NULL
)
9033 globals
= elf32_arm_hash_table (info
);
9034 BFD_ASSERT (globals
!= NULL
);
9035 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
9037 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
9038 ARM2THUMB_GLUE_SECTION_NAME
);
9039 BFD_ASSERT (s
!= NULL
);
9040 BFD_ASSERT (s
->contents
!= NULL
);
9041 BFD_ASSERT (s
->output_section
!= NULL
);
9043 sec
= eh
->export_glue
->root
.u
.def
.section
;
9045 BFD_ASSERT (sec
->output_section
!= NULL
);
9047 val
= eh
->export_glue
->root
.u
.def
.value
+ sec
->output_offset
9048 + sec
->output_section
->vma
;
9050 myh
= elf32_arm_create_thumb_stub (info
, h
->root
.root
.string
,
9051 h
->root
.u
.def
.section
->owner
,
9052 globals
->obfd
, sec
, val
, s
,
9058 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
9061 elf32_arm_bx_glue (struct bfd_link_info
* info
, int reg
)
9066 struct elf32_arm_link_hash_table
*globals
;
9068 globals
= elf32_arm_hash_table (info
);
9069 BFD_ASSERT (globals
!= NULL
);
9070 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
9072 s
= bfd_get_linker_section (globals
->bfd_of_glue_owner
,
9073 ARM_BX_GLUE_SECTION_NAME
);
9074 BFD_ASSERT (s
!= NULL
);
9075 BFD_ASSERT (s
->contents
!= NULL
);
9076 BFD_ASSERT (s
->output_section
!= NULL
);
9078 BFD_ASSERT (globals
->bx_glue_offset
[reg
] & 2);
9080 glue_addr
= globals
->bx_glue_offset
[reg
] & ~(bfd_vma
)3;
9082 if ((globals
->bx_glue_offset
[reg
] & 1) == 0)
9084 p
= s
->contents
+ glue_addr
;
9085 bfd_put_32 (globals
->obfd
, armbx1_tst_insn
+ (reg
<< 16), p
);
9086 bfd_put_32 (globals
->obfd
, armbx2_moveq_insn
+ reg
, p
+ 4);
9087 bfd_put_32 (globals
->obfd
, armbx3_bx_insn
+ reg
, p
+ 8);
9088 globals
->bx_glue_offset
[reg
] |= 1;
9091 return glue_addr
+ s
->output_section
->vma
+ s
->output_offset
;
9094 /* Generate Arm stubs for exported Thumb symbols. */
9096 elf32_arm_begin_write_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
9097 struct bfd_link_info
*link_info
)
9099 struct elf32_arm_link_hash_table
* globals
;
9101 if (link_info
== NULL
)
9102 /* Ignore this if we are not called by the ELF backend linker. */
9105 globals
= elf32_arm_hash_table (link_info
);
9106 if (globals
== NULL
)
9109 /* If blx is available then exported Thumb symbols are OK and there is
9111 if (globals
->use_blx
)
9114 elf_link_hash_traverse (&globals
->root
, elf32_arm_to_thumb_export_stub
,
9118 /* Reserve space for COUNT dynamic relocations in relocation selection
9122 elf32_arm_allocate_dynrelocs (struct bfd_link_info
*info
, asection
*sreloc
,
9123 bfd_size_type count
)
9125 struct elf32_arm_link_hash_table
*htab
;
9127 htab
= elf32_arm_hash_table (info
);
9128 BFD_ASSERT (htab
->root
.dynamic_sections_created
);
9131 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
9134 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
9135 dynamic, the relocations should go in SRELOC, otherwise they should
9136 go in the special .rel.iplt section. */
9139 elf32_arm_allocate_irelocs (struct bfd_link_info
*info
, asection
*sreloc
,
9140 bfd_size_type count
)
9142 struct elf32_arm_link_hash_table
*htab
;
9144 htab
= elf32_arm_hash_table (info
);
9145 if (!htab
->root
.dynamic_sections_created
)
9146 htab
->root
.irelplt
->size
+= RELOC_SIZE (htab
) * count
;
9149 BFD_ASSERT (sreloc
!= NULL
);
9150 sreloc
->size
+= RELOC_SIZE (htab
) * count
;
9154 /* Add relocation REL to the end of relocation section SRELOC. */
9157 elf32_arm_add_dynreloc (bfd
*output_bfd
, struct bfd_link_info
*info
,
9158 asection
*sreloc
, Elf_Internal_Rela
*rel
)
9161 struct elf32_arm_link_hash_table
*htab
;
9163 htab
= elf32_arm_hash_table (info
);
9164 if (!htab
->root
.dynamic_sections_created
9165 && ELF32_R_TYPE (rel
->r_info
) == R_ARM_IRELATIVE
)
9166 sreloc
= htab
->root
.irelplt
;
9169 loc
= sreloc
->contents
;
9170 loc
+= sreloc
->reloc_count
++ * RELOC_SIZE (htab
);
9171 if (sreloc
->reloc_count
* RELOC_SIZE (htab
) > sreloc
->size
)
9173 SWAP_RELOC_OUT (htab
) (output_bfd
, rel
, loc
);
9176 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
9177 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
9181 elf32_arm_allocate_plt_entry (struct bfd_link_info
*info
,
9182 bfd_boolean is_iplt_entry
,
9183 union gotplt_union
*root_plt
,
9184 struct arm_plt_info
*arm_plt
)
9186 struct elf32_arm_link_hash_table
*htab
;
9190 htab
= elf32_arm_hash_table (info
);
9194 splt
= htab
->root
.iplt
;
9195 sgotplt
= htab
->root
.igotplt
;
9197 /* NaCl uses a special first entry in .iplt too. */
9198 if (htab
->nacl_p
&& splt
->size
== 0)
9199 splt
->size
+= htab
->plt_header_size
;
9201 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
9202 elf32_arm_allocate_irelocs (info
, htab
->root
.irelplt
, 1);
9206 splt
= htab
->root
.splt
;
9207 sgotplt
= htab
->root
.sgotplt
;
9209 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
9210 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
9212 /* If this is the first .plt entry, make room for the special
9214 if (splt
->size
== 0)
9215 splt
->size
+= htab
->plt_header_size
;
9217 htab
->next_tls_desc_index
++;
9220 /* Allocate the PLT entry itself, including any leading Thumb stub. */
9221 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
9222 splt
->size
+= PLT_THUMB_STUB_SIZE
;
9223 root_plt
->offset
= splt
->size
;
9224 splt
->size
+= htab
->plt_entry_size
;
9226 if (!htab
->symbian_p
)
9228 /* We also need to make an entry in the .got.plt section, which
9229 will be placed in the .got section by the linker script. */
9231 arm_plt
->got_offset
= sgotplt
->size
;
9233 arm_plt
->got_offset
= sgotplt
->size
- 8 * htab
->num_tls_desc
;
9239 arm_movw_immediate (bfd_vma value
)
9241 return (value
& 0x00000fff) | ((value
& 0x0000f000) << 4);
9245 arm_movt_immediate (bfd_vma value
)
9247 return ((value
& 0x0fff0000) >> 16) | ((value
& 0xf0000000) >> 12);
9250 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
9251 the entry lives in .iplt and resolves to (*SYM_VALUE)().
9252 Otherwise, DYNINDX is the index of the symbol in the dynamic
9253 symbol table and SYM_VALUE is undefined.
9255 ROOT_PLT points to the offset of the PLT entry from the start of its
9256 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
9257 bookkeeping information.
9259 Returns FALSE if there was a problem. */
9262 elf32_arm_populate_plt_entry (bfd
*output_bfd
, struct bfd_link_info
*info
,
9263 union gotplt_union
*root_plt
,
9264 struct arm_plt_info
*arm_plt
,
9265 int dynindx
, bfd_vma sym_value
)
9267 struct elf32_arm_link_hash_table
*htab
;
9273 Elf_Internal_Rela rel
;
9274 bfd_vma plt_header_size
;
9275 bfd_vma got_header_size
;
9277 htab
= elf32_arm_hash_table (info
);
9279 /* Pick the appropriate sections and sizes. */
9282 splt
= htab
->root
.iplt
;
9283 sgot
= htab
->root
.igotplt
;
9284 srel
= htab
->root
.irelplt
;
9286 /* There are no reserved entries in .igot.plt, and no special
9287 first entry in .iplt. */
9288 got_header_size
= 0;
9289 plt_header_size
= 0;
9293 splt
= htab
->root
.splt
;
9294 sgot
= htab
->root
.sgotplt
;
9295 srel
= htab
->root
.srelplt
;
9297 got_header_size
= get_elf_backend_data (output_bfd
)->got_header_size
;
9298 plt_header_size
= htab
->plt_header_size
;
9300 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
9302 /* Fill in the entry in the procedure linkage table. */
9303 if (htab
->symbian_p
)
9305 BFD_ASSERT (dynindx
>= 0);
9306 put_arm_insn (htab
, output_bfd
,
9307 elf32_arm_symbian_plt_entry
[0],
9308 splt
->contents
+ root_plt
->offset
);
9309 bfd_put_32 (output_bfd
,
9310 elf32_arm_symbian_plt_entry
[1],
9311 splt
->contents
+ root_plt
->offset
+ 4);
9313 /* Fill in the entry in the .rel.plt section. */
9314 rel
.r_offset
= (splt
->output_section
->vma
9315 + splt
->output_offset
9316 + root_plt
->offset
+ 4);
9317 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_GLOB_DAT
);
9319 /* Get the index in the procedure linkage table which
9320 corresponds to this symbol. This is the index of this symbol
9321 in all the symbols for which we are making plt entries. The
9322 first entry in the procedure linkage table is reserved. */
9323 plt_index
= ((root_plt
->offset
- plt_header_size
)
9324 / htab
->plt_entry_size
);
9328 bfd_vma got_offset
, got_address
, plt_address
;
9329 bfd_vma got_displacement
, initial_got_entry
;
9332 BFD_ASSERT (sgot
!= NULL
);
9334 /* Get the offset into the .(i)got.plt table of the entry that
9335 corresponds to this function. */
9336 got_offset
= (arm_plt
->got_offset
& -2);
9338 /* Get the index in the procedure linkage table which
9339 corresponds to this symbol. This is the index of this symbol
9340 in all the symbols for which we are making plt entries.
9341 After the reserved .got.plt entries, all symbols appear in
9342 the same order as in .plt. */
9343 plt_index
= (got_offset
- got_header_size
) / 4;
9345 /* Calculate the address of the GOT entry. */
9346 got_address
= (sgot
->output_section
->vma
9347 + sgot
->output_offset
9350 /* ...and the address of the PLT entry. */
9351 plt_address
= (splt
->output_section
->vma
9352 + splt
->output_offset
9353 + root_plt
->offset
);
9355 ptr
= splt
->contents
+ root_plt
->offset
;
9356 if (htab
->vxworks_p
&& bfd_link_pic (info
))
9361 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
9363 val
= elf32_arm_vxworks_shared_plt_entry
[i
];
9365 val
|= got_address
- sgot
->output_section
->vma
;
9367 val
|= plt_index
* RELOC_SIZE (htab
);
9368 if (i
== 2 || i
== 5)
9369 bfd_put_32 (output_bfd
, val
, ptr
);
9371 put_arm_insn (htab
, output_bfd
, val
, ptr
);
9374 else if (htab
->vxworks_p
)
9379 for (i
= 0; i
!= htab
->plt_entry_size
/ 4; i
++, ptr
+= 4)
9381 val
= elf32_arm_vxworks_exec_plt_entry
[i
];
9385 val
|= 0xffffff & -((root_plt
->offset
+ i
* 4 + 8) >> 2);
9387 val
|= plt_index
* RELOC_SIZE (htab
);
9388 if (i
== 2 || i
== 5)
9389 bfd_put_32 (output_bfd
, val
, ptr
);
9391 put_arm_insn (htab
, output_bfd
, val
, ptr
);
9394 loc
= (htab
->srelplt2
->contents
9395 + (plt_index
* 2 + 1) * RELOC_SIZE (htab
));
9397 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
9398 referencing the GOT for this PLT entry. */
9399 rel
.r_offset
= plt_address
+ 8;
9400 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
9401 rel
.r_addend
= got_offset
;
9402 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
9403 loc
+= RELOC_SIZE (htab
);
9405 /* Create the R_ARM_ABS32 relocation referencing the
9406 beginning of the PLT for this GOT entry. */
9407 rel
.r_offset
= got_address
;
9408 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
9410 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
9412 else if (htab
->nacl_p
)
9414 /* Calculate the displacement between the PLT slot and the
9415 common tail that's part of the special initial PLT slot. */
9416 int32_t tail_displacement
9417 = ((splt
->output_section
->vma
+ splt
->output_offset
9418 + ARM_NACL_PLT_TAIL_OFFSET
)
9419 - (plt_address
+ htab
->plt_entry_size
+ 4));
9420 BFD_ASSERT ((tail_displacement
& 3) == 0);
9421 tail_displacement
>>= 2;
9423 BFD_ASSERT ((tail_displacement
& 0xff000000) == 0
9424 || (-tail_displacement
& 0xff000000) == 0);
9426 /* Calculate the displacement between the PLT slot and the entry
9427 in the GOT. The offset accounts for the value produced by
9428 adding to pc in the penultimate instruction of the PLT stub. */
9429 got_displacement
= (got_address
9430 - (plt_address
+ htab
->plt_entry_size
));
9432 /* NaCl does not support interworking at all. */
9433 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
));
9435 put_arm_insn (htab
, output_bfd
,
9436 elf32_arm_nacl_plt_entry
[0]
9437 | arm_movw_immediate (got_displacement
),
9439 put_arm_insn (htab
, output_bfd
,
9440 elf32_arm_nacl_plt_entry
[1]
9441 | arm_movt_immediate (got_displacement
),
9443 put_arm_insn (htab
, output_bfd
,
9444 elf32_arm_nacl_plt_entry
[2],
9446 put_arm_insn (htab
, output_bfd
,
9447 elf32_arm_nacl_plt_entry
[3]
9448 | (tail_displacement
& 0x00ffffff),
9451 else if (using_thumb_only (htab
))
9453 /* PR ld/16017: Generate thumb only PLT entries. */
9454 if (!using_thumb2 (htab
))
9456 /* FIXME: We ought to be able to generate thumb-1 PLT
9458 _bfd_error_handler (_("%B: Warning: thumb-1 mode PLT generation not currently supported"),
9463 /* Calculate the displacement between the PLT slot and the entry in
9464 the GOT. The 12-byte offset accounts for the value produced by
9465 adding to pc in the 3rd instruction of the PLT stub. */
9466 got_displacement
= got_address
- (plt_address
+ 12);
9468 /* As we are using 32 bit instructions we have to use 'put_arm_insn'
9469 instead of 'put_thumb_insn'. */
9470 put_arm_insn (htab
, output_bfd
,
9471 elf32_thumb2_plt_entry
[0]
9472 | ((got_displacement
& 0x000000ff) << 16)
9473 | ((got_displacement
& 0x00000700) << 20)
9474 | ((got_displacement
& 0x00000800) >> 1)
9475 | ((got_displacement
& 0x0000f000) >> 12),
9477 put_arm_insn (htab
, output_bfd
,
9478 elf32_thumb2_plt_entry
[1]
9479 | ((got_displacement
& 0x00ff0000) )
9480 | ((got_displacement
& 0x07000000) << 4)
9481 | ((got_displacement
& 0x08000000) >> 17)
9482 | ((got_displacement
& 0xf0000000) >> 28),
9484 put_arm_insn (htab
, output_bfd
,
9485 elf32_thumb2_plt_entry
[2],
9487 put_arm_insn (htab
, output_bfd
,
9488 elf32_thumb2_plt_entry
[3],
9493 /* Calculate the displacement between the PLT slot and the
9494 entry in the GOT. The eight-byte offset accounts for the
9495 value produced by adding to pc in the first instruction
9497 got_displacement
= got_address
- (plt_address
+ 8);
9499 if (elf32_arm_plt_needs_thumb_stub_p (info
, arm_plt
))
9501 put_thumb_insn (htab
, output_bfd
,
9502 elf32_arm_plt_thumb_stub
[0], ptr
- 4);
9503 put_thumb_insn (htab
, output_bfd
,
9504 elf32_arm_plt_thumb_stub
[1], ptr
- 2);
9507 if (!elf32_arm_use_long_plt_entry
)
9509 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
9511 put_arm_insn (htab
, output_bfd
,
9512 elf32_arm_plt_entry_short
[0]
9513 | ((got_displacement
& 0x0ff00000) >> 20),
9515 put_arm_insn (htab
, output_bfd
,
9516 elf32_arm_plt_entry_short
[1]
9517 | ((got_displacement
& 0x000ff000) >> 12),
9519 put_arm_insn (htab
, output_bfd
,
9520 elf32_arm_plt_entry_short
[2]
9521 | (got_displacement
& 0x00000fff),
9523 #ifdef FOUR_WORD_PLT
9524 bfd_put_32 (output_bfd
, elf32_arm_plt_entry_short
[3], ptr
+ 12);
9529 put_arm_insn (htab
, output_bfd
,
9530 elf32_arm_plt_entry_long
[0]
9531 | ((got_displacement
& 0xf0000000) >> 28),
9533 put_arm_insn (htab
, output_bfd
,
9534 elf32_arm_plt_entry_long
[1]
9535 | ((got_displacement
& 0x0ff00000) >> 20),
9537 put_arm_insn (htab
, output_bfd
,
9538 elf32_arm_plt_entry_long
[2]
9539 | ((got_displacement
& 0x000ff000) >> 12),
9541 put_arm_insn (htab
, output_bfd
,
9542 elf32_arm_plt_entry_long
[3]
9543 | (got_displacement
& 0x00000fff),
9548 /* Fill in the entry in the .rel(a).(i)plt section. */
9549 rel
.r_offset
= got_address
;
9553 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
9554 The dynamic linker or static executable then calls SYM_VALUE
9555 to determine the correct run-time value of the .igot.plt entry. */
9556 rel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
9557 initial_got_entry
= sym_value
;
9561 rel
.r_info
= ELF32_R_INFO (dynindx
, R_ARM_JUMP_SLOT
);
9562 initial_got_entry
= (splt
->output_section
->vma
9563 + splt
->output_offset
);
9566 /* Fill in the entry in the global offset table. */
9567 bfd_put_32 (output_bfd
, initial_got_entry
,
9568 sgot
->contents
+ got_offset
);
9572 elf32_arm_add_dynreloc (output_bfd
, info
, srel
, &rel
);
9575 loc
= srel
->contents
+ plt_index
* RELOC_SIZE (htab
);
9576 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, loc
);
9582 /* Some relocations map to different relocations depending on the
9583 target. Return the real relocation. */
9586 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
9592 if (globals
->target1_is_rel
)
9598 return globals
->target2_reloc
;
9605 /* Return the base VMA address which should be subtracted from real addresses
9606 when resolving @dtpoff relocation.
9607 This is PT_TLS segment p_vaddr. */
9610 dtpoff_base (struct bfd_link_info
*info
)
9612 /* If tls_sec is NULL, we should have signalled an error already. */
9613 if (elf_hash_table (info
)->tls_sec
== NULL
)
9615 return elf_hash_table (info
)->tls_sec
->vma
;
9618 /* Return the relocation value for @tpoff relocation
9619 if STT_TLS virtual address is ADDRESS. */
9622 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
9624 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
9627 /* If tls_sec is NULL, we should have signalled an error already. */
9628 if (htab
->tls_sec
== NULL
)
9630 base
= align_power ((bfd_vma
) TCB_SIZE
, htab
->tls_sec
->alignment_power
);
9631 return address
- htab
->tls_sec
->vma
+ base
;
9634 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
9635 VALUE is the relocation value. */
9637 static bfd_reloc_status_type
9638 elf32_arm_abs12_reloc (bfd
*abfd
, void *data
, bfd_vma value
)
9641 return bfd_reloc_overflow
;
9643 value
|= bfd_get_32 (abfd
, data
) & 0xfffff000;
9644 bfd_put_32 (abfd
, value
, data
);
9645 return bfd_reloc_ok
;
9648 /* Handle TLS relaxations. Relaxing is possible for symbols that use
9649 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
9650 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
9652 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
9653 is to then call final_link_relocate. Return other values in the
9656 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
9657 the pre-relaxed code. It would be nice if the relocs were updated
9658 to match the optimization. */
9660 static bfd_reloc_status_type
9661 elf32_arm_tls_relax (struct elf32_arm_link_hash_table
*globals
,
9662 bfd
*input_bfd
, asection
*input_sec
, bfd_byte
*contents
,
9663 Elf_Internal_Rela
*rel
, unsigned long is_local
)
9667 switch (ELF32_R_TYPE (rel
->r_info
))
9670 return bfd_reloc_notsupported
;
9672 case R_ARM_TLS_GOTDESC
:
9677 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
9679 insn
-= 5; /* THUMB */
9681 insn
-= 8; /* ARM */
9683 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
9684 return bfd_reloc_continue
;
9686 case R_ARM_THM_TLS_DESCSEQ
:
9688 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
);
9689 if ((insn
& 0xff78) == 0x4478) /* add rx, pc */
9693 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
9695 else if ((insn
& 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
9699 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
9702 bfd_put_16 (input_bfd
, insn
& 0xf83f, contents
+ rel
->r_offset
);
9704 else if ((insn
& 0xff87) == 0x4780) /* blx rx */
9708 bfd_put_16 (input_bfd
, 0x46c0, contents
+ rel
->r_offset
);
9711 bfd_put_16 (input_bfd
, 0x4600 | (insn
& 0x78),
9712 contents
+ rel
->r_offset
);
9716 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
9717 /* It's a 32 bit instruction, fetch the rest of it for
9718 error generation. */
9720 | bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 2);
9722 /* xgettext:c-format */
9723 (_("%B(%A+%#Lx): unexpected Thumb instruction '%#lx' in TLS trampoline"),
9724 input_bfd
, input_sec
, rel
->r_offset
, insn
);
9725 return bfd_reloc_notsupported
;
9729 case R_ARM_TLS_DESCSEQ
:
9731 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
9732 if ((insn
& 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
9736 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xffff),
9737 contents
+ rel
->r_offset
);
9739 else if ((insn
& 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
9743 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
9746 bfd_put_32 (input_bfd
, insn
& 0xfffff000,
9747 contents
+ rel
->r_offset
);
9749 else if ((insn
& 0xfffffff0) == 0xe12fff30) /* blx rx */
9753 bfd_put_32 (input_bfd
, 0xe1a00000, contents
+ rel
->r_offset
);
9756 bfd_put_32 (input_bfd
, 0xe1a00000 | (insn
& 0xf),
9757 contents
+ rel
->r_offset
);
9762 /* xgettext:c-format */
9763 (_("%B(%A+%#Lx): unexpected ARM instruction '%#lx' in TLS trampoline"),
9764 input_bfd
, input_sec
, rel
->r_offset
, insn
);
9765 return bfd_reloc_notsupported
;
9769 case R_ARM_TLS_CALL
:
9770 /* GD->IE relaxation, turn the instruction into 'nop' or
9771 'ldr r0, [pc,r0]' */
9772 insn
= is_local
? 0xe1a00000 : 0xe79f0000;
9773 bfd_put_32 (input_bfd
, insn
, contents
+ rel
->r_offset
);
9776 case R_ARM_THM_TLS_CALL
:
9777 /* GD->IE relaxation. */
9779 /* add r0,pc; ldr r0, [r0] */
9781 else if (using_thumb2 (globals
))
9788 bfd_put_16 (input_bfd
, insn
>> 16, contents
+ rel
->r_offset
);
9789 bfd_put_16 (input_bfd
, insn
& 0xffff, contents
+ rel
->r_offset
+ 2);
9792 return bfd_reloc_ok
;
9795 /* For a given value of n, calculate the value of G_n as required to
9796 deal with group relocations. We return it in the form of an
9797 encoded constant-and-rotation, together with the final residual. If n is
9798 specified as less than zero, then final_residual is filled with the
9799 input value and no further action is performed. */
9802 calculate_group_reloc_mask (bfd_vma value
, int n
, bfd_vma
*final_residual
)
9806 bfd_vma encoded_g_n
= 0;
9807 bfd_vma residual
= value
; /* Also known as Y_n. */
9809 for (current_n
= 0; current_n
<= n
; current_n
++)
9813 /* Calculate which part of the value to mask. */
9820 /* Determine the most significant bit in the residual and
9821 align the resulting value to a 2-bit boundary. */
9822 for (msb
= 30; msb
>= 0; msb
-= 2)
9823 if (residual
& (3 << msb
))
9826 /* The desired shift is now (msb - 6), or zero, whichever
9833 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
9834 g_n
= residual
& (0xff << shift
);
9835 encoded_g_n
= (g_n
>> shift
)
9836 | ((g_n
<= 0xff ? 0 : (32 - shift
) / 2) << 8);
9838 /* Calculate the residual for the next time around. */
9842 *final_residual
= residual
;
9847 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
9848 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
9851 identify_add_or_sub (bfd_vma insn
)
9853 int opcode
= insn
& 0x1e00000;
9855 if (opcode
== 1 << 23) /* ADD */
9858 if (opcode
== 1 << 22) /* SUB */
9864 /* Perform a relocation as part of a final link. */
9866 static bfd_reloc_status_type
9867 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
9870 asection
* input_section
,
9871 bfd_byte
* contents
,
9872 Elf_Internal_Rela
* rel
,
9874 struct bfd_link_info
* info
,
9876 const char * sym_name
,
9877 unsigned char st_type
,
9878 enum arm_st_branch_type branch_type
,
9879 struct elf_link_hash_entry
* h
,
9880 bfd_boolean
* unresolved_reloc_p
,
9881 char ** error_message
)
9883 unsigned long r_type
= howto
->type
;
9884 unsigned long r_symndx
;
9885 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
9886 bfd_vma
* local_got_offsets
;
9887 bfd_vma
* local_tlsdesc_gotents
;
9890 asection
* sreloc
= NULL
;
9893 bfd_signed_vma signed_addend
;
9894 unsigned char dynreloc_st_type
;
9895 bfd_vma dynreloc_value
;
9896 struct elf32_arm_link_hash_table
* globals
;
9897 struct elf32_arm_link_hash_entry
*eh
;
9898 union gotplt_union
*root_plt
;
9899 struct arm_plt_info
*arm_plt
;
9901 bfd_vma gotplt_offset
;
9902 bfd_boolean has_iplt_entry
;
9904 globals
= elf32_arm_hash_table (info
);
9905 if (globals
== NULL
)
9906 return bfd_reloc_notsupported
;
9908 BFD_ASSERT (is_arm_elf (input_bfd
));
9909 BFD_ASSERT (howto
!= NULL
);
9911 /* Some relocation types map to different relocations depending on the
9912 target. We pick the right one here. */
9913 r_type
= arm_real_reloc_type (globals
, r_type
);
9915 /* It is possible to have linker relaxations on some TLS access
9916 models. Update our information here. */
9917 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
9919 if (r_type
!= howto
->type
)
9920 howto
= elf32_arm_howto_from_type (r_type
);
9922 eh
= (struct elf32_arm_link_hash_entry
*) h
;
9923 sgot
= globals
->root
.sgot
;
9924 local_got_offsets
= elf_local_got_offsets (input_bfd
);
9925 local_tlsdesc_gotents
= elf32_arm_local_tlsdesc_gotent (input_bfd
);
9927 if (globals
->root
.dynamic_sections_created
)
9928 srelgot
= globals
->root
.srelgot
;
9932 r_symndx
= ELF32_R_SYM (rel
->r_info
);
9934 if (globals
->use_rel
)
9936 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
9938 if (addend
& ((howto
->src_mask
+ 1) >> 1))
9941 signed_addend
&= ~ howto
->src_mask
;
9942 signed_addend
|= addend
;
9945 signed_addend
= addend
;
9948 addend
= signed_addend
= rel
->r_addend
;
9950 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
9951 are resolving a function call relocation. */
9952 if (using_thumb_only (globals
)
9953 && (r_type
== R_ARM_THM_CALL
9954 || r_type
== R_ARM_THM_JUMP24
)
9955 && branch_type
== ST_BRANCH_TO_ARM
)
9956 branch_type
= ST_BRANCH_TO_THUMB
;
9958 /* Record the symbol information that should be used in dynamic
9960 dynreloc_st_type
= st_type
;
9961 dynreloc_value
= value
;
9962 if (branch_type
== ST_BRANCH_TO_THUMB
)
9963 dynreloc_value
|= 1;
9965 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
9966 VALUE appropriately for relocations that we resolve at link time. */
9967 has_iplt_entry
= FALSE
;
9968 if (elf32_arm_get_plt_info (input_bfd
, globals
, eh
, r_symndx
, &root_plt
,
9970 && root_plt
->offset
!= (bfd_vma
) -1)
9972 plt_offset
= root_plt
->offset
;
9973 gotplt_offset
= arm_plt
->got_offset
;
9975 if (h
== NULL
|| eh
->is_iplt
)
9977 has_iplt_entry
= TRUE
;
9978 splt
= globals
->root
.iplt
;
9980 /* Populate .iplt entries here, because not all of them will
9981 be seen by finish_dynamic_symbol. The lower bit is set if
9982 we have already populated the entry. */
9987 if (elf32_arm_populate_plt_entry (output_bfd
, info
, root_plt
, arm_plt
,
9988 -1, dynreloc_value
))
9989 root_plt
->offset
|= 1;
9991 return bfd_reloc_notsupported
;
9994 /* Static relocations always resolve to the .iplt entry. */
9996 value
= (splt
->output_section
->vma
9997 + splt
->output_offset
9999 branch_type
= ST_BRANCH_TO_ARM
;
10001 /* If there are non-call relocations that resolve to the .iplt
10002 entry, then all dynamic ones must too. */
10003 if (arm_plt
->noncall_refcount
!= 0)
10005 dynreloc_st_type
= st_type
;
10006 dynreloc_value
= value
;
10010 /* We populate the .plt entry in finish_dynamic_symbol. */
10011 splt
= globals
->root
.splt
;
10016 plt_offset
= (bfd_vma
) -1;
10017 gotplt_offset
= (bfd_vma
) -1;
10023 /* We don't need to find a value for this symbol. It's just a
10025 *unresolved_reloc_p
= FALSE
;
10026 return bfd_reloc_ok
;
10029 if (!globals
->vxworks_p
)
10030 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
10031 /* Fall through. */
10035 case R_ARM_ABS32_NOI
:
10037 case R_ARM_REL32_NOI
:
10043 /* Handle relocations which should use the PLT entry. ABS32/REL32
10044 will use the symbol's value, which may point to a PLT entry, but we
10045 don't need to handle that here. If we created a PLT entry, all
10046 branches in this object should go to it, except if the PLT is too
10047 far away, in which case a long branch stub should be inserted. */
10048 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
10049 && r_type
!= R_ARM_ABS32_NOI
&& r_type
!= R_ARM_REL32_NOI
10050 && r_type
!= R_ARM_CALL
10051 && r_type
!= R_ARM_JUMP24
10052 && r_type
!= R_ARM_PLT32
)
10053 && plt_offset
!= (bfd_vma
) -1)
10055 /* If we've created a .plt section, and assigned a PLT entry
10056 to this function, it must either be a STT_GNU_IFUNC reference
10057 or not be known to bind locally. In other cases, we should
10058 have cleared the PLT entry by now. */
10059 BFD_ASSERT (has_iplt_entry
|| !SYMBOL_CALLS_LOCAL (info
, h
));
10061 value
= (splt
->output_section
->vma
10062 + splt
->output_offset
10064 *unresolved_reloc_p
= FALSE
;
10065 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
10066 contents
, rel
->r_offset
, value
,
10070 /* When generating a shared object or relocatable executable, these
10071 relocations are copied into the output file to be resolved at
10073 if ((bfd_link_pic (info
)
10074 || globals
->root
.is_relocatable_executable
)
10075 && (input_section
->flags
& SEC_ALLOC
)
10076 && !(globals
->vxworks_p
10077 && strcmp (input_section
->output_section
->name
,
10079 && ((r_type
!= R_ARM_REL32
&& r_type
!= R_ARM_REL32_NOI
)
10080 || !SYMBOL_CALLS_LOCAL (info
, h
))
10081 && !(input_bfd
== globals
->stub_bfd
10082 && strstr (input_section
->name
, STUB_SUFFIX
))
10084 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
10085 || h
->root
.type
!= bfd_link_hash_undefweak
)
10086 && r_type
!= R_ARM_PC24
10087 && r_type
!= R_ARM_CALL
10088 && r_type
!= R_ARM_JUMP24
10089 && r_type
!= R_ARM_PREL31
10090 && r_type
!= R_ARM_PLT32
)
10092 Elf_Internal_Rela outrel
;
10093 bfd_boolean skip
, relocate
;
10095 if ((r_type
== R_ARM_REL32
|| r_type
== R_ARM_REL32_NOI
)
10096 && !h
->def_regular
)
10098 char *v
= _("shared object");
10100 if (bfd_link_executable (info
))
10101 v
= _("PIE executable");
10104 (_("%B: relocation %s against external or undefined symbol `%s'"
10105 " can not be used when making a %s; recompile with -fPIC"), input_bfd
,
10106 elf32_arm_howto_table_1
[r_type
].name
, h
->root
.root
.string
, v
);
10107 return bfd_reloc_notsupported
;
10110 *unresolved_reloc_p
= FALSE
;
10112 if (sreloc
== NULL
&& globals
->root
.dynamic_sections_created
)
10114 sreloc
= _bfd_elf_get_dynamic_reloc_section (input_bfd
, input_section
,
10115 ! globals
->use_rel
);
10117 if (sreloc
== NULL
)
10118 return bfd_reloc_notsupported
;
10124 outrel
.r_addend
= addend
;
10126 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
10128 if (outrel
.r_offset
== (bfd_vma
) -1)
10130 else if (outrel
.r_offset
== (bfd_vma
) -2)
10131 skip
= TRUE
, relocate
= TRUE
;
10132 outrel
.r_offset
+= (input_section
->output_section
->vma
10133 + input_section
->output_offset
);
10136 memset (&outrel
, 0, sizeof outrel
);
10138 && h
->dynindx
!= -1
10139 && (!bfd_link_pic (info
)
10140 || !(bfd_link_pie (info
)
10141 || SYMBOLIC_BIND (info
, h
))
10142 || !h
->def_regular
))
10143 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
10148 /* This symbol is local, or marked to become local. */
10149 BFD_ASSERT (r_type
== R_ARM_ABS32
|| r_type
== R_ARM_ABS32_NOI
);
10150 if (globals
->symbian_p
)
10154 /* On Symbian OS, the data segment and text segement
10155 can be relocated independently. Therefore, we
10156 must indicate the segment to which this
10157 relocation is relative. The BPABI allows us to
10158 use any symbol in the right segment; we just use
10159 the section symbol as it is convenient. (We
10160 cannot use the symbol given by "h" directly as it
10161 will not appear in the dynamic symbol table.)
10163 Note that the dynamic linker ignores the section
10164 symbol value, so we don't subtract osec->vma
10165 from the emitted reloc addend. */
10167 osec
= sym_sec
->output_section
;
10169 osec
= input_section
->output_section
;
10170 symbol
= elf_section_data (osec
)->dynindx
;
10173 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
10175 if ((osec
->flags
& SEC_READONLY
) == 0
10176 && htab
->data_index_section
!= NULL
)
10177 osec
= htab
->data_index_section
;
10179 osec
= htab
->text_index_section
;
10180 symbol
= elf_section_data (osec
)->dynindx
;
10182 BFD_ASSERT (symbol
!= 0);
10185 /* On SVR4-ish systems, the dynamic loader cannot
10186 relocate the text and data segments independently,
10187 so the symbol does not matter. */
10189 if (dynreloc_st_type
== STT_GNU_IFUNC
)
10190 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
10191 to the .iplt entry. Instead, every non-call reference
10192 must use an R_ARM_IRELATIVE relocation to obtain the
10193 correct run-time address. */
10194 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_IRELATIVE
);
10196 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
10197 if (globals
->use_rel
)
10200 outrel
.r_addend
+= dynreloc_value
;
10203 elf32_arm_add_dynreloc (output_bfd
, info
, sreloc
, &outrel
);
10205 /* If this reloc is against an external symbol, we do not want to
10206 fiddle with the addend. Otherwise, we need to include the symbol
10207 value so that it becomes an addend for the dynamic reloc. */
10209 return bfd_reloc_ok
;
10211 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
10212 contents
, rel
->r_offset
,
10213 dynreloc_value
, (bfd_vma
) 0);
10215 else switch (r_type
)
10218 return elf32_arm_abs12_reloc (input_bfd
, hit_data
, value
+ addend
);
10220 case R_ARM_XPC25
: /* Arm BLX instruction. */
10223 case R_ARM_PC24
: /* Arm B/BL instruction. */
10226 struct elf32_arm_stub_hash_entry
*stub_entry
= NULL
;
10228 if (r_type
== R_ARM_XPC25
)
10230 /* Check for Arm calling Arm function. */
10231 /* FIXME: Should we translate the instruction into a BL
10232 instruction instead ? */
10233 if (branch_type
!= ST_BRANCH_TO_THUMB
)
10235 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
10237 h
? h
->root
.root
.string
: "(local)");
10239 else if (r_type
== R_ARM_PC24
)
10241 /* Check for Arm calling Thumb function. */
10242 if (branch_type
== ST_BRANCH_TO_THUMB
)
10244 if (elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
10245 output_bfd
, input_section
,
10246 hit_data
, sym_sec
, rel
->r_offset
,
10247 signed_addend
, value
,
10249 return bfd_reloc_ok
;
10251 return bfd_reloc_dangerous
;
10255 /* Check if a stub has to be inserted because the
10256 destination is too far or we are changing mode. */
10257 if ( r_type
== R_ARM_CALL
10258 || r_type
== R_ARM_JUMP24
10259 || r_type
== R_ARM_PLT32
)
10261 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
10262 struct elf32_arm_link_hash_entry
*hash
;
10264 hash
= (struct elf32_arm_link_hash_entry
*) h
;
10265 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
10266 st_type
, &branch_type
,
10267 hash
, value
, sym_sec
,
10268 input_bfd
, sym_name
);
10270 if (stub_type
!= arm_stub_none
)
10272 /* The target is out of reach, so redirect the
10273 branch to the local stub for this function. */
10274 stub_entry
= elf32_arm_get_stub_entry (input_section
,
10279 if (stub_entry
!= NULL
)
10280 value
= (stub_entry
->stub_offset
10281 + stub_entry
->stub_sec
->output_offset
10282 + stub_entry
->stub_sec
->output_section
->vma
);
10284 if (plt_offset
!= (bfd_vma
) -1)
10285 *unresolved_reloc_p
= FALSE
;
10290 /* If the call goes through a PLT entry, make sure to
10291 check distance to the right destination address. */
10292 if (plt_offset
!= (bfd_vma
) -1)
10294 value
= (splt
->output_section
->vma
10295 + splt
->output_offset
10297 *unresolved_reloc_p
= FALSE
;
10298 /* The PLT entry is in ARM mode, regardless of the
10299 target function. */
10300 branch_type
= ST_BRANCH_TO_ARM
;
10305 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
10307 S is the address of the symbol in the relocation.
10308 P is address of the instruction being relocated.
10309 A is the addend (extracted from the instruction) in bytes.
10311 S is held in 'value'.
10312 P is the base address of the section containing the
10313 instruction plus the offset of the reloc into that
10315 (input_section->output_section->vma +
10316 input_section->output_offset +
10318 A is the addend, converted into bytes, ie:
10319 (signed_addend * 4)
10321 Note: None of these operations have knowledge of the pipeline
10322 size of the processor, thus it is up to the assembler to
10323 encode this information into the addend. */
10324 value
-= (input_section
->output_section
->vma
10325 + input_section
->output_offset
);
10326 value
-= rel
->r_offset
;
10327 if (globals
->use_rel
)
10328 value
+= (signed_addend
<< howto
->size
);
10330 /* RELA addends do not have to be adjusted by howto->size. */
10331 value
+= signed_addend
;
10333 signed_addend
= value
;
10334 signed_addend
>>= howto
->rightshift
;
10336 /* A branch to an undefined weak symbol is turned into a jump to
10337 the next instruction unless a PLT entry will be created.
10338 Do the same for local undefined symbols (but not for STN_UNDEF).
10339 The jump to the next instruction is optimized as a NOP depending
10340 on the architecture. */
10341 if (h
? (h
->root
.type
== bfd_link_hash_undefweak
10342 && plt_offset
== (bfd_vma
) -1)
10343 : r_symndx
!= STN_UNDEF
&& bfd_is_und_section (sym_sec
))
10345 value
= (bfd_get_32 (input_bfd
, hit_data
) & 0xf0000000);
10347 if (arch_has_arm_nop (globals
))
10348 value
|= 0x0320f000;
10350 value
|= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
10354 /* Perform a signed range check. */
10355 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
10356 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
10357 return bfd_reloc_overflow
;
10359 addend
= (value
& 2);
10361 value
= (signed_addend
& howto
->dst_mask
)
10362 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
10364 if (r_type
== R_ARM_CALL
)
10366 /* Set the H bit in the BLX instruction. */
10367 if (branch_type
== ST_BRANCH_TO_THUMB
)
10370 value
|= (1 << 24);
10372 value
&= ~(bfd_vma
)(1 << 24);
10375 /* Select the correct instruction (BL or BLX). */
10376 /* Only if we are not handling a BL to a stub. In this
10377 case, mode switching is performed by the stub. */
10378 if (branch_type
== ST_BRANCH_TO_THUMB
&& !stub_entry
)
10379 value
|= (1 << 28);
10380 else if (stub_entry
|| branch_type
!= ST_BRANCH_UNKNOWN
)
10382 value
&= ~(bfd_vma
)(1 << 28);
10383 value
|= (1 << 24);
10392 if (branch_type
== ST_BRANCH_TO_THUMB
)
10396 case R_ARM_ABS32_NOI
:
10402 if (branch_type
== ST_BRANCH_TO_THUMB
)
10404 value
-= (input_section
->output_section
->vma
10405 + input_section
->output_offset
+ rel
->r_offset
);
10408 case R_ARM_REL32_NOI
:
10410 value
-= (input_section
->output_section
->vma
10411 + input_section
->output_offset
+ rel
->r_offset
);
10415 value
-= (input_section
->output_section
->vma
10416 + input_section
->output_offset
+ rel
->r_offset
);
10417 value
+= signed_addend
;
10418 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
10420 /* Check for overflow. */
10421 if ((value
^ (value
>> 1)) & (1 << 30))
10422 return bfd_reloc_overflow
;
10424 value
&= 0x7fffffff;
10425 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
10426 if (branch_type
== ST_BRANCH_TO_THUMB
)
10431 bfd_put_32 (input_bfd
, value
, hit_data
);
10432 return bfd_reloc_ok
;
10435 /* PR 16202: Refectch the addend using the correct size. */
10436 if (globals
->use_rel
)
10437 addend
= bfd_get_8 (input_bfd
, hit_data
);
10440 /* There is no way to tell whether the user intended to use a signed or
10441 unsigned addend. When checking for overflow we accept either,
10442 as specified by the AAELF. */
10443 if ((long) value
> 0xff || (long) value
< -0x80)
10444 return bfd_reloc_overflow
;
10446 bfd_put_8 (input_bfd
, value
, hit_data
);
10447 return bfd_reloc_ok
;
10450 /* PR 16202: Refectch the addend using the correct size. */
10451 if (globals
->use_rel
)
10452 addend
= bfd_get_16 (input_bfd
, hit_data
);
10455 /* See comment for R_ARM_ABS8. */
10456 if ((long) value
> 0xffff || (long) value
< -0x8000)
10457 return bfd_reloc_overflow
;
10459 bfd_put_16 (input_bfd
, value
, hit_data
);
10460 return bfd_reloc_ok
;
10462 case R_ARM_THM_ABS5
:
10463 /* Support ldr and str instructions for the thumb. */
10464 if (globals
->use_rel
)
10466 /* Need to refetch addend. */
10467 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
10468 /* ??? Need to determine shift amount from operand size. */
10469 addend
>>= howto
->rightshift
;
10473 /* ??? Isn't value unsigned? */
10474 if ((long) value
> 0x1f || (long) value
< -0x10)
10475 return bfd_reloc_overflow
;
10477 /* ??? Value needs to be properly shifted into place first. */
10478 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
10479 bfd_put_16 (input_bfd
, value
, hit_data
);
10480 return bfd_reloc_ok
;
10482 case R_ARM_THM_ALU_PREL_11_0
:
10483 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
10486 bfd_signed_vma relocation
;
10488 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
10489 | bfd_get_16 (input_bfd
, hit_data
+ 2);
10491 if (globals
->use_rel
)
10493 signed_addend
= (insn
& 0xff) | ((insn
& 0x7000) >> 4)
10494 | ((insn
& (1 << 26)) >> 15);
10495 if (insn
& 0xf00000)
10496 signed_addend
= -signed_addend
;
10499 relocation
= value
+ signed_addend
;
10500 relocation
-= Pa (input_section
->output_section
->vma
10501 + input_section
->output_offset
10504 /* PR 21523: Use an absolute value. The user of this reloc will
10505 have already selected an ADD or SUB insn appropriately. */
10506 value
= labs (relocation
);
10508 if (value
>= 0x1000)
10509 return bfd_reloc_overflow
;
10511 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
10512 if (branch_type
== ST_BRANCH_TO_THUMB
)
10515 insn
= (insn
& 0xfb0f8f00) | (value
& 0xff)
10516 | ((value
& 0x700) << 4)
10517 | ((value
& 0x800) << 15);
10518 if (relocation
< 0)
10521 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
10522 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
10524 return bfd_reloc_ok
;
10527 case R_ARM_THM_PC8
:
10528 /* PR 10073: This reloc is not generated by the GNU toolchain,
10529 but it is supported for compatibility with third party libraries
10530 generated by other compilers, specifically the ARM/IAR. */
10533 bfd_signed_vma relocation
;
10535 insn
= bfd_get_16 (input_bfd
, hit_data
);
10537 if (globals
->use_rel
)
10538 addend
= ((((insn
& 0x00ff) << 2) + 4) & 0x3ff) -4;
10540 relocation
= value
+ addend
;
10541 relocation
-= Pa (input_section
->output_section
->vma
10542 + input_section
->output_offset
10545 value
= relocation
;
10547 /* We do not check for overflow of this reloc. Although strictly
10548 speaking this is incorrect, it appears to be necessary in order
10549 to work with IAR generated relocs. Since GCC and GAS do not
10550 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
10551 a problem for them. */
10554 insn
= (insn
& 0xff00) | (value
>> 2);
10556 bfd_put_16 (input_bfd
, insn
, hit_data
);
10558 return bfd_reloc_ok
;
10561 case R_ARM_THM_PC12
:
10562 /* Corresponds to: ldr.w reg, [pc, #offset]. */
10565 bfd_signed_vma relocation
;
10567 insn
= (bfd_get_16 (input_bfd
, hit_data
) << 16)
10568 | bfd_get_16 (input_bfd
, hit_data
+ 2);
10570 if (globals
->use_rel
)
10572 signed_addend
= insn
& 0xfff;
10573 if (!(insn
& (1 << 23)))
10574 signed_addend
= -signed_addend
;
10577 relocation
= value
+ signed_addend
;
10578 relocation
-= Pa (input_section
->output_section
->vma
10579 + input_section
->output_offset
10582 value
= relocation
;
10584 if (value
>= 0x1000)
10585 return bfd_reloc_overflow
;
10587 insn
= (insn
& 0xff7ff000) | value
;
10588 if (relocation
>= 0)
10591 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
10592 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
10594 return bfd_reloc_ok
;
10597 case R_ARM_THM_XPC22
:
10598 case R_ARM_THM_CALL
:
10599 case R_ARM_THM_JUMP24
:
10600 /* Thumb BL (branch long instruction). */
10602 bfd_vma relocation
;
10603 bfd_vma reloc_sign
;
10604 bfd_boolean overflow
= FALSE
;
10605 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
10606 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
10607 bfd_signed_vma reloc_signed_max
;
10608 bfd_signed_vma reloc_signed_min
;
10610 bfd_signed_vma signed_check
;
10612 const int thumb2
= using_thumb2 (globals
);
10613 const int thumb2_bl
= using_thumb2_bl (globals
);
10615 /* A branch to an undefined weak symbol is turned into a jump to
10616 the next instruction unless a PLT entry will be created.
10617 The jump to the next instruction is optimized as a NOP.W for
10618 Thumb-2 enabled architectures. */
10619 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
10620 && plt_offset
== (bfd_vma
) -1)
10624 bfd_put_16 (input_bfd
, 0xf3af, hit_data
);
10625 bfd_put_16 (input_bfd
, 0x8000, hit_data
+ 2);
10629 bfd_put_16 (input_bfd
, 0xe000, hit_data
);
10630 bfd_put_16 (input_bfd
, 0xbf00, hit_data
+ 2);
10632 return bfd_reloc_ok
;
10635 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
10636 with Thumb-1) involving the J1 and J2 bits. */
10637 if (globals
->use_rel
)
10639 bfd_vma s
= (upper_insn
& (1 << 10)) >> 10;
10640 bfd_vma upper
= upper_insn
& 0x3ff;
10641 bfd_vma lower
= lower_insn
& 0x7ff;
10642 bfd_vma j1
= (lower_insn
& (1 << 13)) >> 13;
10643 bfd_vma j2
= (lower_insn
& (1 << 11)) >> 11;
10644 bfd_vma i1
= j1
^ s
? 0 : 1;
10645 bfd_vma i2
= j2
^ s
? 0 : 1;
10647 addend
= (i1
<< 23) | (i2
<< 22) | (upper
<< 12) | (lower
<< 1);
10649 addend
= (addend
| ((s
? 0 : 1) << 24)) - (1 << 24);
10651 signed_addend
= addend
;
10654 if (r_type
== R_ARM_THM_XPC22
)
10656 /* Check for Thumb to Thumb call. */
10657 /* FIXME: Should we translate the instruction into a BL
10658 instruction instead ? */
10659 if (branch_type
== ST_BRANCH_TO_THUMB
)
10661 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
10663 h
? h
->root
.root
.string
: "(local)");
10667 /* If it is not a call to Thumb, assume call to Arm.
10668 If it is a call relative to a section name, then it is not a
10669 function call at all, but rather a long jump. Calls through
10670 the PLT do not require stubs. */
10671 if (branch_type
== ST_BRANCH_TO_ARM
&& plt_offset
== (bfd_vma
) -1)
10673 if (globals
->use_blx
&& r_type
== R_ARM_THM_CALL
)
10675 /* Convert BL to BLX. */
10676 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
10678 else if (( r_type
!= R_ARM_THM_CALL
)
10679 && (r_type
!= R_ARM_THM_JUMP24
))
10681 if (elf32_thumb_to_arm_stub
10682 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
10683 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
,
10685 return bfd_reloc_ok
;
10687 return bfd_reloc_dangerous
;
10690 else if (branch_type
== ST_BRANCH_TO_THUMB
10691 && globals
->use_blx
10692 && r_type
== R_ARM_THM_CALL
)
10694 /* Make sure this is a BL. */
10695 lower_insn
|= 0x1800;
10699 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
10700 if (r_type
== R_ARM_THM_CALL
|| r_type
== R_ARM_THM_JUMP24
)
10702 /* Check if a stub has to be inserted because the destination
10704 struct elf32_arm_stub_hash_entry
*stub_entry
;
10705 struct elf32_arm_link_hash_entry
*hash
;
10707 hash
= (struct elf32_arm_link_hash_entry
*) h
;
10709 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
10710 st_type
, &branch_type
,
10711 hash
, value
, sym_sec
,
10712 input_bfd
, sym_name
);
10714 if (stub_type
!= arm_stub_none
)
10716 /* The target is out of reach or we are changing modes, so
10717 redirect the branch to the local stub for this
10719 stub_entry
= elf32_arm_get_stub_entry (input_section
,
10723 if (stub_entry
!= NULL
)
10725 value
= (stub_entry
->stub_offset
10726 + stub_entry
->stub_sec
->output_offset
10727 + stub_entry
->stub_sec
->output_section
->vma
);
10729 if (plt_offset
!= (bfd_vma
) -1)
10730 *unresolved_reloc_p
= FALSE
;
10733 /* If this call becomes a call to Arm, force BLX. */
10734 if (globals
->use_blx
&& (r_type
== R_ARM_THM_CALL
))
10737 && !arm_stub_is_thumb (stub_entry
->stub_type
))
10738 || branch_type
!= ST_BRANCH_TO_THUMB
)
10739 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
10744 /* Handle calls via the PLT. */
10745 if (stub_type
== arm_stub_none
&& plt_offset
!= (bfd_vma
) -1)
10747 value
= (splt
->output_section
->vma
10748 + splt
->output_offset
10751 if (globals
->use_blx
10752 && r_type
== R_ARM_THM_CALL
10753 && ! using_thumb_only (globals
))
10755 /* If the Thumb BLX instruction is available, convert
10756 the BL to a BLX instruction to call the ARM-mode
10758 lower_insn
= (lower_insn
& ~0x1000) | 0x0800;
10759 branch_type
= ST_BRANCH_TO_ARM
;
10763 if (! using_thumb_only (globals
))
10764 /* Target the Thumb stub before the ARM PLT entry. */
10765 value
-= PLT_THUMB_STUB_SIZE
;
10766 branch_type
= ST_BRANCH_TO_THUMB
;
10768 *unresolved_reloc_p
= FALSE
;
10771 relocation
= value
+ signed_addend
;
10773 relocation
-= (input_section
->output_section
->vma
10774 + input_section
->output_offset
10777 check
= relocation
>> howto
->rightshift
;
10779 /* If this is a signed value, the rightshift just dropped
10780 leading 1 bits (assuming twos complement). */
10781 if ((bfd_signed_vma
) relocation
>= 0)
10782 signed_check
= check
;
10784 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
10786 /* Calculate the permissable maximum and minimum values for
10787 this relocation according to whether we're relocating for
10789 bitsize
= howto
->bitsize
;
10792 reloc_signed_max
= (1 << (bitsize
- 1)) - 1;
10793 reloc_signed_min
= ~reloc_signed_max
;
10795 /* Assumes two's complement. */
10796 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
10799 if ((lower_insn
& 0x5000) == 0x4000)
10800 /* For a BLX instruction, make sure that the relocation is rounded up
10801 to a word boundary. This follows the semantics of the instruction
10802 which specifies that bit 1 of the target address will come from bit
10803 1 of the base address. */
10804 relocation
= (relocation
+ 2) & ~ 3;
10806 /* Put RELOCATION back into the insn. Assumes two's complement.
10807 We use the Thumb-2 encoding, which is safe even if dealing with
10808 a Thumb-1 instruction by virtue of our overflow check above. */
10809 reloc_sign
= (signed_check
< 0) ? 1 : 0;
10810 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff)
10811 | ((relocation
>> 12) & 0x3ff)
10812 | (reloc_sign
<< 10);
10813 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x2fff)
10814 | (((!((relocation
>> 23) & 1)) ^ reloc_sign
) << 13)
10815 | (((!((relocation
>> 22) & 1)) ^ reloc_sign
) << 11)
10816 | ((relocation
>> 1) & 0x7ff);
10818 /* Put the relocated value back in the object file: */
10819 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
10820 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
10822 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
10826 case R_ARM_THM_JUMP19
:
10827 /* Thumb32 conditional branch instruction. */
10829 bfd_vma relocation
;
10830 bfd_boolean overflow
= FALSE
;
10831 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
10832 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
10833 bfd_signed_vma reloc_signed_max
= 0xffffe;
10834 bfd_signed_vma reloc_signed_min
= -0x100000;
10835 bfd_signed_vma signed_check
;
10836 enum elf32_arm_stub_type stub_type
= arm_stub_none
;
10837 struct elf32_arm_stub_hash_entry
*stub_entry
;
10838 struct elf32_arm_link_hash_entry
*hash
;
10840 /* Need to refetch the addend, reconstruct the top three bits,
10841 and squish the two 11 bit pieces together. */
10842 if (globals
->use_rel
)
10844 bfd_vma S
= (upper_insn
& 0x0400) >> 10;
10845 bfd_vma upper
= (upper_insn
& 0x003f);
10846 bfd_vma J1
= (lower_insn
& 0x2000) >> 13;
10847 bfd_vma J2
= (lower_insn
& 0x0800) >> 11;
10848 bfd_vma lower
= (lower_insn
& 0x07ff);
10852 upper
|= (!S
) << 8;
10853 upper
-= 0x0100; /* Sign extend. */
10855 addend
= (upper
<< 12) | (lower
<< 1);
10856 signed_addend
= addend
;
10859 /* Handle calls via the PLT. */
10860 if (plt_offset
!= (bfd_vma
) -1)
10862 value
= (splt
->output_section
->vma
10863 + splt
->output_offset
10865 /* Target the Thumb stub before the ARM PLT entry. */
10866 value
-= PLT_THUMB_STUB_SIZE
;
10867 *unresolved_reloc_p
= FALSE
;
10870 hash
= (struct elf32_arm_link_hash_entry
*)h
;
10872 stub_type
= arm_type_of_stub (info
, input_section
, rel
,
10873 st_type
, &branch_type
,
10874 hash
, value
, sym_sec
,
10875 input_bfd
, sym_name
);
10876 if (stub_type
!= arm_stub_none
)
10878 stub_entry
= elf32_arm_get_stub_entry (input_section
,
10882 if (stub_entry
!= NULL
)
10884 value
= (stub_entry
->stub_offset
10885 + stub_entry
->stub_sec
->output_offset
10886 + stub_entry
->stub_sec
->output_section
->vma
);
10890 relocation
= value
+ signed_addend
;
10891 relocation
-= (input_section
->output_section
->vma
10892 + input_section
->output_offset
10894 signed_check
= (bfd_signed_vma
) relocation
;
10896 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
10899 /* Put RELOCATION back into the insn. */
10901 bfd_vma S
= (relocation
& 0x00100000) >> 20;
10902 bfd_vma J2
= (relocation
& 0x00080000) >> 19;
10903 bfd_vma J1
= (relocation
& 0x00040000) >> 18;
10904 bfd_vma hi
= (relocation
& 0x0003f000) >> 12;
10905 bfd_vma lo
= (relocation
& 0x00000ffe) >> 1;
10907 upper_insn
= (upper_insn
& 0xfbc0) | (S
<< 10) | hi
;
10908 lower_insn
= (lower_insn
& 0xd000) | (J1
<< 13) | (J2
<< 11) | lo
;
10911 /* Put the relocated value back in the object file: */
10912 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
10913 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
10915 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
10918 case R_ARM_THM_JUMP11
:
10919 case R_ARM_THM_JUMP8
:
10920 case R_ARM_THM_JUMP6
:
10921 /* Thumb B (branch) instruction). */
10923 bfd_signed_vma relocation
;
10924 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
10925 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
10926 bfd_signed_vma signed_check
;
10928 /* CZB cannot jump backward. */
10929 if (r_type
== R_ARM_THM_JUMP6
)
10930 reloc_signed_min
= 0;
10932 if (globals
->use_rel
)
10934 /* Need to refetch addend. */
10935 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
10936 if (addend
& ((howto
->src_mask
+ 1) >> 1))
10938 signed_addend
= -1;
10939 signed_addend
&= ~ howto
->src_mask
;
10940 signed_addend
|= addend
;
10943 signed_addend
= addend
;
10944 /* The value in the insn has been right shifted. We need to
10945 undo this, so that we can perform the address calculation
10946 in terms of bytes. */
10947 signed_addend
<<= howto
->rightshift
;
10949 relocation
= value
+ signed_addend
;
10951 relocation
-= (input_section
->output_section
->vma
10952 + input_section
->output_offset
10955 relocation
>>= howto
->rightshift
;
10956 signed_check
= relocation
;
10958 if (r_type
== R_ARM_THM_JUMP6
)
10959 relocation
= ((relocation
& 0x0020) << 4) | ((relocation
& 0x001f) << 3);
10961 relocation
&= howto
->dst_mask
;
10962 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
10964 bfd_put_16 (input_bfd
, relocation
, hit_data
);
10966 /* Assumes two's complement. */
10967 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
10968 return bfd_reloc_overflow
;
10970 return bfd_reloc_ok
;
10973 case R_ARM_ALU_PCREL7_0
:
10974 case R_ARM_ALU_PCREL15_8
:
10975 case R_ARM_ALU_PCREL23_15
:
10978 bfd_vma relocation
;
10980 insn
= bfd_get_32 (input_bfd
, hit_data
);
10981 if (globals
->use_rel
)
10983 /* Extract the addend. */
10984 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
10985 signed_addend
= addend
;
10987 relocation
= value
+ signed_addend
;
10989 relocation
-= (input_section
->output_section
->vma
10990 + input_section
->output_offset
10992 insn
= (insn
& ~0xfff)
10993 | ((howto
->bitpos
<< 7) & 0xf00)
10994 | ((relocation
>> howto
->bitpos
) & 0xff);
10995 bfd_put_32 (input_bfd
, value
, hit_data
);
10997 return bfd_reloc_ok
;
10999 case R_ARM_GNU_VTINHERIT
:
11000 case R_ARM_GNU_VTENTRY
:
11001 return bfd_reloc_ok
;
11003 case R_ARM_GOTOFF32
:
11004 /* Relocation is relative to the start of the
11005 global offset table. */
11007 BFD_ASSERT (sgot
!= NULL
);
11009 return bfd_reloc_notsupported
;
11011 /* If we are addressing a Thumb function, we need to adjust the
11012 address by one, so that attempts to call the function pointer will
11013 correctly interpret it as Thumb code. */
11014 if (branch_type
== ST_BRANCH_TO_THUMB
)
11017 /* Note that sgot->output_offset is not involved in this
11018 calculation. We always want the start of .got. If we
11019 define _GLOBAL_OFFSET_TABLE in a different way, as is
11020 permitted by the ABI, we might have to change this
11022 value
-= sgot
->output_section
->vma
;
11023 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11024 contents
, rel
->r_offset
, value
,
11028 /* Use global offset table as symbol value. */
11029 BFD_ASSERT (sgot
!= NULL
);
11032 return bfd_reloc_notsupported
;
11034 *unresolved_reloc_p
= FALSE
;
11035 value
= sgot
->output_section
->vma
;
11036 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11037 contents
, rel
->r_offset
, value
,
11041 case R_ARM_GOT_PREL
:
11042 /* Relocation is to the entry for this symbol in the
11043 global offset table. */
11045 return bfd_reloc_notsupported
;
11047 if (dynreloc_st_type
== STT_GNU_IFUNC
11048 && plt_offset
!= (bfd_vma
) -1
11049 && (h
== NULL
|| SYMBOL_REFERENCES_LOCAL (info
, h
)))
11051 /* We have a relocation against a locally-binding STT_GNU_IFUNC
11052 symbol, and the relocation resolves directly to the runtime
11053 target rather than to the .iplt entry. This means that any
11054 .got entry would be the same value as the .igot.plt entry,
11055 so there's no point creating both. */
11056 sgot
= globals
->root
.igotplt
;
11057 value
= sgot
->output_offset
+ gotplt_offset
;
11059 else if (h
!= NULL
)
11063 off
= h
->got
.offset
;
11064 BFD_ASSERT (off
!= (bfd_vma
) -1);
11065 if ((off
& 1) != 0)
11067 /* We have already processsed one GOT relocation against
11070 if (globals
->root
.dynamic_sections_created
11071 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
11072 *unresolved_reloc_p
= FALSE
;
11076 Elf_Internal_Rela outrel
;
11078 if (h
->dynindx
!= -1 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
11080 /* If the symbol doesn't resolve locally in a static
11081 object, we have an undefined reference. If the
11082 symbol doesn't resolve locally in a dynamic object,
11083 it should be resolved by the dynamic linker. */
11084 if (globals
->root
.dynamic_sections_created
)
11086 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
11087 *unresolved_reloc_p
= FALSE
;
11091 outrel
.r_addend
= 0;
11095 if (dynreloc_st_type
== STT_GNU_IFUNC
)
11096 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
11097 else if (bfd_link_pic (info
)
11098 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11099 || h
->root
.type
!= bfd_link_hash_undefweak
))
11100 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
11103 outrel
.r_addend
= dynreloc_value
;
11106 /* The GOT entry is initialized to zero by default.
11107 See if we should install a different value. */
11108 if (outrel
.r_addend
!= 0
11109 && (outrel
.r_info
== 0 || globals
->use_rel
))
11111 bfd_put_32 (output_bfd
, outrel
.r_addend
,
11112 sgot
->contents
+ off
);
11113 outrel
.r_addend
= 0;
11116 if (outrel
.r_info
!= 0)
11118 outrel
.r_offset
= (sgot
->output_section
->vma
11119 + sgot
->output_offset
11121 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
11123 h
->got
.offset
|= 1;
11125 value
= sgot
->output_offset
+ off
;
11131 BFD_ASSERT (local_got_offsets
!= NULL
11132 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
11134 off
= local_got_offsets
[r_symndx
];
11136 /* The offset must always be a multiple of 4. We use the
11137 least significant bit to record whether we have already
11138 generated the necessary reloc. */
11139 if ((off
& 1) != 0)
11143 if (globals
->use_rel
)
11144 bfd_put_32 (output_bfd
, dynreloc_value
, sgot
->contents
+ off
);
11146 if (bfd_link_pic (info
) || dynreloc_st_type
== STT_GNU_IFUNC
)
11148 Elf_Internal_Rela outrel
;
11150 outrel
.r_addend
= addend
+ dynreloc_value
;
11151 outrel
.r_offset
= (sgot
->output_section
->vma
11152 + sgot
->output_offset
11154 if (dynreloc_st_type
== STT_GNU_IFUNC
)
11155 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_IRELATIVE
);
11157 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
11158 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
11161 local_got_offsets
[r_symndx
] |= 1;
11164 value
= sgot
->output_offset
+ off
;
11166 if (r_type
!= R_ARM_GOT32
)
11167 value
+= sgot
->output_section
->vma
;
11169 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11170 contents
, rel
->r_offset
, value
,
11173 case R_ARM_TLS_LDO32
:
11174 value
= value
- dtpoff_base (info
);
11176 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11177 contents
, rel
->r_offset
, value
,
11180 case R_ARM_TLS_LDM32
:
11187 off
= globals
->tls_ldm_got
.offset
;
11189 if ((off
& 1) != 0)
11193 /* If we don't know the module number, create a relocation
11195 if (bfd_link_pic (info
))
11197 Elf_Internal_Rela outrel
;
11199 if (srelgot
== NULL
)
11202 outrel
.r_addend
= 0;
11203 outrel
.r_offset
= (sgot
->output_section
->vma
11204 + sgot
->output_offset
+ off
);
11205 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32
);
11207 if (globals
->use_rel
)
11208 bfd_put_32 (output_bfd
, outrel
.r_addend
,
11209 sgot
->contents
+ off
);
11211 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
11214 bfd_put_32 (output_bfd
, 1, sgot
->contents
+ off
);
11216 globals
->tls_ldm_got
.offset
|= 1;
11219 value
= sgot
->output_section
->vma
+ sgot
->output_offset
+ off
11220 - (input_section
->output_section
->vma
+ input_section
->output_offset
+ rel
->r_offset
);
11222 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11223 contents
, rel
->r_offset
, value
,
11227 case R_ARM_TLS_CALL
:
11228 case R_ARM_THM_TLS_CALL
:
11229 case R_ARM_TLS_GD32
:
11230 case R_ARM_TLS_IE32
:
11231 case R_ARM_TLS_GOTDESC
:
11232 case R_ARM_TLS_DESCSEQ
:
11233 case R_ARM_THM_TLS_DESCSEQ
:
11235 bfd_vma off
, offplt
;
11239 BFD_ASSERT (sgot
!= NULL
);
11244 dyn
= globals
->root
.dynamic_sections_created
;
11245 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
11246 bfd_link_pic (info
),
11248 && (!bfd_link_pic (info
)
11249 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
11251 *unresolved_reloc_p
= FALSE
;
11254 off
= h
->got
.offset
;
11255 offplt
= elf32_arm_hash_entry (h
)->tlsdesc_got
;
11256 tls_type
= ((struct elf32_arm_link_hash_entry
*) h
)->tls_type
;
11260 BFD_ASSERT (local_got_offsets
!= NULL
);
11261 off
= local_got_offsets
[r_symndx
];
11262 offplt
= local_tlsdesc_gotents
[r_symndx
];
11263 tls_type
= elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
];
11266 /* Linker relaxations happens from one of the
11267 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
11268 if (ELF32_R_TYPE(rel
->r_info
) != r_type
)
11269 tls_type
= GOT_TLS_IE
;
11271 BFD_ASSERT (tls_type
!= GOT_UNKNOWN
);
11273 if ((off
& 1) != 0)
11277 bfd_boolean need_relocs
= FALSE
;
11278 Elf_Internal_Rela outrel
;
11281 /* The GOT entries have not been initialized yet. Do it
11282 now, and emit any relocations. If both an IE GOT and a
11283 GD GOT are necessary, we emit the GD first. */
11285 if ((bfd_link_pic (info
) || indx
!= 0)
11287 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
11288 || h
->root
.type
!= bfd_link_hash_undefweak
))
11290 need_relocs
= TRUE
;
11291 BFD_ASSERT (srelgot
!= NULL
);
11294 if (tls_type
& GOT_TLS_GDESC
)
11298 /* We should have relaxed, unless this is an undefined
11300 BFD_ASSERT ((h
&& (h
->root
.type
== bfd_link_hash_undefweak
))
11301 || bfd_link_pic (info
));
11302 BFD_ASSERT (globals
->sgotplt_jump_table_size
+ offplt
+ 8
11303 <= globals
->root
.sgotplt
->size
);
11305 outrel
.r_addend
= 0;
11306 outrel
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
11307 + globals
->root
.sgotplt
->output_offset
11309 + globals
->sgotplt_jump_table_size
);
11311 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DESC
);
11312 sreloc
= globals
->root
.srelplt
;
11313 loc
= sreloc
->contents
;
11314 loc
+= globals
->next_tls_desc_index
++ * RELOC_SIZE (globals
);
11315 BFD_ASSERT (loc
+ RELOC_SIZE (globals
)
11316 <= sreloc
->contents
+ sreloc
->size
);
11318 SWAP_RELOC_OUT (globals
) (output_bfd
, &outrel
, loc
);
11320 /* For globals, the first word in the relocation gets
11321 the relocation index and the top bit set, or zero,
11322 if we're binding now. For locals, it gets the
11323 symbol's offset in the tls section. */
11324 bfd_put_32 (output_bfd
,
11325 !h
? value
- elf_hash_table (info
)->tls_sec
->vma
11326 : info
->flags
& DF_BIND_NOW
? 0
11327 : 0x80000000 | ELF32_R_SYM (outrel
.r_info
),
11328 globals
->root
.sgotplt
->contents
+ offplt
11329 + globals
->sgotplt_jump_table_size
);
11331 /* Second word in the relocation is always zero. */
11332 bfd_put_32 (output_bfd
, 0,
11333 globals
->root
.sgotplt
->contents
+ offplt
11334 + globals
->sgotplt_jump_table_size
+ 4);
11336 if (tls_type
& GOT_TLS_GD
)
11340 outrel
.r_addend
= 0;
11341 outrel
.r_offset
= (sgot
->output_section
->vma
11342 + sgot
->output_offset
11344 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_DTPMOD32
);
11346 if (globals
->use_rel
)
11347 bfd_put_32 (output_bfd
, outrel
.r_addend
,
11348 sgot
->contents
+ cur_off
);
11350 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
11353 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
11354 sgot
->contents
+ cur_off
+ 4);
11357 outrel
.r_addend
= 0;
11358 outrel
.r_info
= ELF32_R_INFO (indx
,
11359 R_ARM_TLS_DTPOFF32
);
11360 outrel
.r_offset
+= 4;
11362 if (globals
->use_rel
)
11363 bfd_put_32 (output_bfd
, outrel
.r_addend
,
11364 sgot
->contents
+ cur_off
+ 4);
11366 elf32_arm_add_dynreloc (output_bfd
, info
,
11372 /* If we are not emitting relocations for a
11373 general dynamic reference, then we must be in a
11374 static link or an executable link with the
11375 symbol binding locally. Mark it as belonging
11376 to module 1, the executable. */
11377 bfd_put_32 (output_bfd
, 1,
11378 sgot
->contents
+ cur_off
);
11379 bfd_put_32 (output_bfd
, value
- dtpoff_base (info
),
11380 sgot
->contents
+ cur_off
+ 4);
11386 if (tls_type
& GOT_TLS_IE
)
11391 outrel
.r_addend
= value
- dtpoff_base (info
);
11393 outrel
.r_addend
= 0;
11394 outrel
.r_offset
= (sgot
->output_section
->vma
11395 + sgot
->output_offset
11397 outrel
.r_info
= ELF32_R_INFO (indx
, R_ARM_TLS_TPOFF32
);
11399 if (globals
->use_rel
)
11400 bfd_put_32 (output_bfd
, outrel
.r_addend
,
11401 sgot
->contents
+ cur_off
);
11403 elf32_arm_add_dynreloc (output_bfd
, info
, srelgot
, &outrel
);
11406 bfd_put_32 (output_bfd
, tpoff (info
, value
),
11407 sgot
->contents
+ cur_off
);
11412 h
->got
.offset
|= 1;
11414 local_got_offsets
[r_symndx
] |= 1;
11417 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_ARM_TLS_GD32
)
11419 else if (tls_type
& GOT_TLS_GDESC
)
11422 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
11423 || ELF32_R_TYPE(rel
->r_info
) == R_ARM_THM_TLS_CALL
)
11425 bfd_signed_vma offset
;
11426 /* TLS stubs are arm mode. The original symbol is a
11427 data object, so branch_type is bogus. */
11428 branch_type
= ST_BRANCH_TO_ARM
;
11429 enum elf32_arm_stub_type stub_type
11430 = arm_type_of_stub (info
, input_section
, rel
,
11431 st_type
, &branch_type
,
11432 (struct elf32_arm_link_hash_entry
*)h
,
11433 globals
->tls_trampoline
, globals
->root
.splt
,
11434 input_bfd
, sym_name
);
11436 if (stub_type
!= arm_stub_none
)
11438 struct elf32_arm_stub_hash_entry
*stub_entry
11439 = elf32_arm_get_stub_entry
11440 (input_section
, globals
->root
.splt
, 0, rel
,
11441 globals
, stub_type
);
11442 offset
= (stub_entry
->stub_offset
11443 + stub_entry
->stub_sec
->output_offset
11444 + stub_entry
->stub_sec
->output_section
->vma
);
11447 offset
= (globals
->root
.splt
->output_section
->vma
11448 + globals
->root
.splt
->output_offset
11449 + globals
->tls_trampoline
);
11451 if (ELF32_R_TYPE(rel
->r_info
) == R_ARM_TLS_CALL
)
11453 unsigned long inst
;
11455 offset
-= (input_section
->output_section
->vma
11456 + input_section
->output_offset
11457 + rel
->r_offset
+ 8);
11459 inst
= offset
>> 2;
11460 inst
&= 0x00ffffff;
11461 value
= inst
| (globals
->use_blx
? 0xfa000000 : 0xeb000000);
11465 /* Thumb blx encodes the offset in a complicated
11467 unsigned upper_insn
, lower_insn
;
11470 offset
-= (input_section
->output_section
->vma
11471 + input_section
->output_offset
11472 + rel
->r_offset
+ 4);
11474 if (stub_type
!= arm_stub_none
11475 && arm_stub_is_thumb (stub_type
))
11477 lower_insn
= 0xd000;
11481 lower_insn
= 0xc000;
11482 /* Round up the offset to a word boundary. */
11483 offset
= (offset
+ 2) & ~2;
11487 upper_insn
= (0xf000
11488 | ((offset
>> 12) & 0x3ff)
11490 lower_insn
|= (((!((offset
>> 23) & 1)) ^ neg
) << 13)
11491 | (((!((offset
>> 22) & 1)) ^ neg
) << 11)
11492 | ((offset
>> 1) & 0x7ff);
11493 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
11494 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
11495 return bfd_reloc_ok
;
11498 /* These relocations needs special care, as besides the fact
11499 they point somewhere in .gotplt, the addend must be
11500 adjusted accordingly depending on the type of instruction
11502 else if ((r_type
== R_ARM_TLS_GOTDESC
) && (tls_type
& GOT_TLS_GDESC
))
11504 unsigned long data
, insn
;
11507 data
= bfd_get_32 (input_bfd
, hit_data
);
11513 insn
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
- data
);
11514 if ((insn
& 0xf000) == 0xf000 || (insn
& 0xf800) == 0xe800)
11515 insn
= (insn
<< 16)
11516 | bfd_get_16 (input_bfd
,
11517 contents
+ rel
->r_offset
- data
+ 2);
11518 if ((insn
& 0xf800c000) == 0xf000c000)
11521 else if ((insn
& 0xffffff00) == 0x4400)
11527 /* xgettext:c-format */
11528 (_("%B(%A+%#Lx): unexpected Thumb instruction '%#lx' referenced by TLS_GOTDESC"),
11529 input_bfd
, input_section
, rel
->r_offset
, insn
);
11530 return bfd_reloc_notsupported
;
11535 insn
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
- data
);
11537 switch (insn
>> 24)
11539 case 0xeb: /* bl */
11540 case 0xfa: /* blx */
11544 case 0xe0: /* add */
11550 /* xgettext:c-format */
11551 (_("%B(%A+%#Lx): unexpected ARM instruction '%#lx' referenced by TLS_GOTDESC"),
11552 input_bfd
, input_section
, rel
->r_offset
, insn
);
11553 return bfd_reloc_notsupported
;
11557 value
+= ((globals
->root
.sgotplt
->output_section
->vma
11558 + globals
->root
.sgotplt
->output_offset
+ off
)
11559 - (input_section
->output_section
->vma
11560 + input_section
->output_offset
11562 + globals
->sgotplt_jump_table_size
);
11565 value
= ((globals
->root
.sgot
->output_section
->vma
11566 + globals
->root
.sgot
->output_offset
+ off
)
11567 - (input_section
->output_section
->vma
11568 + input_section
->output_offset
+ rel
->r_offset
));
11570 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11571 contents
, rel
->r_offset
, value
,
11575 case R_ARM_TLS_LE32
:
11576 if (bfd_link_dll (info
))
11579 /* xgettext:c-format */
11580 (_("%B(%A+%#Lx): %s relocation not permitted in shared object"),
11581 input_bfd
, input_section
, rel
->r_offset
, howto
->name
);
11582 return bfd_reloc_notsupported
;
11585 value
= tpoff (info
, value
);
11587 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
11588 contents
, rel
->r_offset
, value
,
11592 if (globals
->fix_v4bx
)
11594 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
11596 /* Ensure that we have a BX instruction. */
11597 BFD_ASSERT ((insn
& 0x0ffffff0) == 0x012fff10);
11599 if (globals
->fix_v4bx
== 2 && (insn
& 0xf) != 0xf)
11601 /* Branch to veneer. */
11603 glue_addr
= elf32_arm_bx_glue (info
, insn
& 0xf);
11604 glue_addr
-= input_section
->output_section
->vma
11605 + input_section
->output_offset
11606 + rel
->r_offset
+ 8;
11607 insn
= (insn
& 0xf0000000) | 0x0a000000
11608 | ((glue_addr
>> 2) & 0x00ffffff);
11612 /* Preserve Rm (lowest four bits) and the condition code
11613 (highest four bits). Other bits encode MOV PC,Rm. */
11614 insn
= (insn
& 0xf000000f) | 0x01a0f000;
11617 bfd_put_32 (input_bfd
, insn
, hit_data
);
11619 return bfd_reloc_ok
;
11621 case R_ARM_MOVW_ABS_NC
:
11622 case R_ARM_MOVT_ABS
:
11623 case R_ARM_MOVW_PREL_NC
:
11624 case R_ARM_MOVT_PREL
:
11625 /* Until we properly support segment-base-relative addressing then
11626 we assume the segment base to be zero, as for the group relocations.
11627 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
11628 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
11629 case R_ARM_MOVW_BREL_NC
:
11630 case R_ARM_MOVW_BREL
:
11631 case R_ARM_MOVT_BREL
:
11633 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
11635 if (globals
->use_rel
)
11637 addend
= ((insn
>> 4) & 0xf000) | (insn
& 0xfff);
11638 signed_addend
= (addend
^ 0x8000) - 0x8000;
11641 value
+= signed_addend
;
11643 if (r_type
== R_ARM_MOVW_PREL_NC
|| r_type
== R_ARM_MOVT_PREL
)
11644 value
-= (input_section
->output_section
->vma
11645 + input_section
->output_offset
+ rel
->r_offset
);
11647 if (r_type
== R_ARM_MOVW_BREL
&& value
>= 0x10000)
11648 return bfd_reloc_overflow
;
11650 if (branch_type
== ST_BRANCH_TO_THUMB
)
11653 if (r_type
== R_ARM_MOVT_ABS
|| r_type
== R_ARM_MOVT_PREL
11654 || r_type
== R_ARM_MOVT_BREL
)
11657 insn
&= 0xfff0f000;
11658 insn
|= value
& 0xfff;
11659 insn
|= (value
& 0xf000) << 4;
11660 bfd_put_32 (input_bfd
, insn
, hit_data
);
11662 return bfd_reloc_ok
;
11664 case R_ARM_THM_MOVW_ABS_NC
:
11665 case R_ARM_THM_MOVT_ABS
:
11666 case R_ARM_THM_MOVW_PREL_NC
:
11667 case R_ARM_THM_MOVT_PREL
:
11668 /* Until we properly support segment-base-relative addressing then
11669 we assume the segment base to be zero, as for the above relocations.
11670 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
11671 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
11672 as R_ARM_THM_MOVT_ABS. */
11673 case R_ARM_THM_MOVW_BREL_NC
:
11674 case R_ARM_THM_MOVW_BREL
:
11675 case R_ARM_THM_MOVT_BREL
:
11679 insn
= bfd_get_16 (input_bfd
, hit_data
) << 16;
11680 insn
|= bfd_get_16 (input_bfd
, hit_data
+ 2);
11682 if (globals
->use_rel
)
11684 addend
= ((insn
>> 4) & 0xf000)
11685 | ((insn
>> 15) & 0x0800)
11686 | ((insn
>> 4) & 0x0700)
11688 signed_addend
= (addend
^ 0x8000) - 0x8000;
11691 value
+= signed_addend
;
11693 if (r_type
== R_ARM_THM_MOVW_PREL_NC
|| r_type
== R_ARM_THM_MOVT_PREL
)
11694 value
-= (input_section
->output_section
->vma
11695 + input_section
->output_offset
+ rel
->r_offset
);
11697 if (r_type
== R_ARM_THM_MOVW_BREL
&& value
>= 0x10000)
11698 return bfd_reloc_overflow
;
11700 if (branch_type
== ST_BRANCH_TO_THUMB
)
11703 if (r_type
== R_ARM_THM_MOVT_ABS
|| r_type
== R_ARM_THM_MOVT_PREL
11704 || r_type
== R_ARM_THM_MOVT_BREL
)
11707 insn
&= 0xfbf08f00;
11708 insn
|= (value
& 0xf000) << 4;
11709 insn
|= (value
& 0x0800) << 15;
11710 insn
|= (value
& 0x0700) << 4;
11711 insn
|= (value
& 0x00ff);
11713 bfd_put_16 (input_bfd
, insn
>> 16, hit_data
);
11714 bfd_put_16 (input_bfd
, insn
& 0xffff, hit_data
+ 2);
11716 return bfd_reloc_ok
;
11718 case R_ARM_ALU_PC_G0_NC
:
11719 case R_ARM_ALU_PC_G1_NC
:
11720 case R_ARM_ALU_PC_G0
:
11721 case R_ARM_ALU_PC_G1
:
11722 case R_ARM_ALU_PC_G2
:
11723 case R_ARM_ALU_SB_G0_NC
:
11724 case R_ARM_ALU_SB_G1_NC
:
11725 case R_ARM_ALU_SB_G0
:
11726 case R_ARM_ALU_SB_G1
:
11727 case R_ARM_ALU_SB_G2
:
11729 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
11730 bfd_vma pc
= input_section
->output_section
->vma
11731 + input_section
->output_offset
+ rel
->r_offset
;
11732 /* sb is the origin of the *segment* containing the symbol. */
11733 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
11736 bfd_signed_vma signed_value
;
11739 /* Determine which group of bits to select. */
11742 case R_ARM_ALU_PC_G0_NC
:
11743 case R_ARM_ALU_PC_G0
:
11744 case R_ARM_ALU_SB_G0_NC
:
11745 case R_ARM_ALU_SB_G0
:
11749 case R_ARM_ALU_PC_G1_NC
:
11750 case R_ARM_ALU_PC_G1
:
11751 case R_ARM_ALU_SB_G1_NC
:
11752 case R_ARM_ALU_SB_G1
:
11756 case R_ARM_ALU_PC_G2
:
11757 case R_ARM_ALU_SB_G2
:
11765 /* If REL, extract the addend from the insn. If RELA, it will
11766 have already been fetched for us. */
11767 if (globals
->use_rel
)
11770 bfd_vma constant
= insn
& 0xff;
11771 bfd_vma rotation
= (insn
& 0xf00) >> 8;
11774 signed_addend
= constant
;
11777 /* Compensate for the fact that in the instruction, the
11778 rotation is stored in multiples of 2 bits. */
11781 /* Rotate "constant" right by "rotation" bits. */
11782 signed_addend
= (constant
>> rotation
) |
11783 (constant
<< (8 * sizeof (bfd_vma
) - rotation
));
11786 /* Determine if the instruction is an ADD or a SUB.
11787 (For REL, this determines the sign of the addend.) */
11788 negative
= identify_add_or_sub (insn
);
11792 /* xgettext:c-format */
11793 (_("%B(%A+%#Lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
11794 input_bfd
, input_section
, rel
->r_offset
);
11795 return bfd_reloc_overflow
;
11798 signed_addend
*= negative
;
11801 /* Compute the value (X) to go in the place. */
11802 if (r_type
== R_ARM_ALU_PC_G0_NC
11803 || r_type
== R_ARM_ALU_PC_G1_NC
11804 || r_type
== R_ARM_ALU_PC_G0
11805 || r_type
== R_ARM_ALU_PC_G1
11806 || r_type
== R_ARM_ALU_PC_G2
)
11808 signed_value
= value
- pc
+ signed_addend
;
11810 /* Section base relative. */
11811 signed_value
= value
- sb
+ signed_addend
;
11813 /* If the target symbol is a Thumb function, then set the
11814 Thumb bit in the address. */
11815 if (branch_type
== ST_BRANCH_TO_THUMB
)
11818 /* Calculate the value of the relevant G_n, in encoded
11819 constant-with-rotation format. */
11820 g_n
= calculate_group_reloc_mask (signed_value
< 0 ? - signed_value
: signed_value
,
11823 /* Check for overflow if required. */
11824 if ((r_type
== R_ARM_ALU_PC_G0
11825 || r_type
== R_ARM_ALU_PC_G1
11826 || r_type
== R_ARM_ALU_PC_G2
11827 || r_type
== R_ARM_ALU_SB_G0
11828 || r_type
== R_ARM_ALU_SB_G1
11829 || r_type
== R_ARM_ALU_SB_G2
) && residual
!= 0)
11832 /* xgettext:c-format */
11833 (_("%B(%A+%#Lx): Overflow whilst splitting %#Lx for group relocation %s"),
11834 input_bfd
, input_section
, rel
->r_offset
,
11835 signed_value
< 0 ? -signed_value
: signed_value
, howto
->name
);
11836 return bfd_reloc_overflow
;
11839 /* Mask out the value and the ADD/SUB part of the opcode; take care
11840 not to destroy the S bit. */
11841 insn
&= 0xff1ff000;
11843 /* Set the opcode according to whether the value to go in the
11844 place is negative. */
11845 if (signed_value
< 0)
11850 /* Encode the offset. */
11853 bfd_put_32 (input_bfd
, insn
, hit_data
);
11855 return bfd_reloc_ok
;
11857 case R_ARM_LDR_PC_G0
:
11858 case R_ARM_LDR_PC_G1
:
11859 case R_ARM_LDR_PC_G2
:
11860 case R_ARM_LDR_SB_G0
:
11861 case R_ARM_LDR_SB_G1
:
11862 case R_ARM_LDR_SB_G2
:
11864 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
11865 bfd_vma pc
= input_section
->output_section
->vma
11866 + input_section
->output_offset
+ rel
->r_offset
;
11867 /* sb is the origin of the *segment* containing the symbol. */
11868 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
11870 bfd_signed_vma signed_value
;
11873 /* Determine which groups of bits to calculate. */
11876 case R_ARM_LDR_PC_G0
:
11877 case R_ARM_LDR_SB_G0
:
11881 case R_ARM_LDR_PC_G1
:
11882 case R_ARM_LDR_SB_G1
:
11886 case R_ARM_LDR_PC_G2
:
11887 case R_ARM_LDR_SB_G2
:
11895 /* If REL, extract the addend from the insn. If RELA, it will
11896 have already been fetched for us. */
11897 if (globals
->use_rel
)
11899 int negative
= (insn
& (1 << 23)) ? 1 : -1;
11900 signed_addend
= negative
* (insn
& 0xfff);
11903 /* Compute the value (X) to go in the place. */
11904 if (r_type
== R_ARM_LDR_PC_G0
11905 || r_type
== R_ARM_LDR_PC_G1
11906 || r_type
== R_ARM_LDR_PC_G2
)
11908 signed_value
= value
- pc
+ signed_addend
;
11910 /* Section base relative. */
11911 signed_value
= value
- sb
+ signed_addend
;
11913 /* Calculate the value of the relevant G_{n-1} to obtain
11914 the residual at that stage. */
11915 calculate_group_reloc_mask (signed_value
< 0 ? - signed_value
: signed_value
,
11916 group
- 1, &residual
);
11918 /* Check for overflow. */
11919 if (residual
>= 0x1000)
11922 /* xgettext:c-format */
11923 (_("%B(%A+%#Lx): Overflow whilst splitting %#Lx for group relocation %s"),
11924 input_bfd
, input_section
, rel
->r_offset
,
11925 signed_value
< 0 ? -signed_value
: signed_value
, howto
->name
);
11926 return bfd_reloc_overflow
;
11929 /* Mask out the value and U bit. */
11930 insn
&= 0xff7ff000;
11932 /* Set the U bit if the value to go in the place is non-negative. */
11933 if (signed_value
>= 0)
11936 /* Encode the offset. */
11939 bfd_put_32 (input_bfd
, insn
, hit_data
);
11941 return bfd_reloc_ok
;
11943 case R_ARM_LDRS_PC_G0
:
11944 case R_ARM_LDRS_PC_G1
:
11945 case R_ARM_LDRS_PC_G2
:
11946 case R_ARM_LDRS_SB_G0
:
11947 case R_ARM_LDRS_SB_G1
:
11948 case R_ARM_LDRS_SB_G2
:
11950 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
11951 bfd_vma pc
= input_section
->output_section
->vma
11952 + input_section
->output_offset
+ rel
->r_offset
;
11953 /* sb is the origin of the *segment* containing the symbol. */
11954 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
11956 bfd_signed_vma signed_value
;
11959 /* Determine which groups of bits to calculate. */
11962 case R_ARM_LDRS_PC_G0
:
11963 case R_ARM_LDRS_SB_G0
:
11967 case R_ARM_LDRS_PC_G1
:
11968 case R_ARM_LDRS_SB_G1
:
11972 case R_ARM_LDRS_PC_G2
:
11973 case R_ARM_LDRS_SB_G2
:
11981 /* If REL, extract the addend from the insn. If RELA, it will
11982 have already been fetched for us. */
11983 if (globals
->use_rel
)
11985 int negative
= (insn
& (1 << 23)) ? 1 : -1;
11986 signed_addend
= negative
* (((insn
& 0xf00) >> 4) + (insn
& 0xf));
11989 /* Compute the value (X) to go in the place. */
11990 if (r_type
== R_ARM_LDRS_PC_G0
11991 || r_type
== R_ARM_LDRS_PC_G1
11992 || r_type
== R_ARM_LDRS_PC_G2
)
11994 signed_value
= value
- pc
+ signed_addend
;
11996 /* Section base relative. */
11997 signed_value
= value
- sb
+ signed_addend
;
11999 /* Calculate the value of the relevant G_{n-1} to obtain
12000 the residual at that stage. */
12001 calculate_group_reloc_mask (signed_value
< 0 ? - signed_value
: signed_value
,
12002 group
- 1, &residual
);
12004 /* Check for overflow. */
12005 if (residual
>= 0x100)
12008 /* xgettext:c-format */
12009 (_("%B(%A+%#Lx): Overflow whilst splitting %#Lx for group relocation %s"),
12010 input_bfd
, input_section
, rel
->r_offset
,
12011 signed_value
< 0 ? -signed_value
: signed_value
, howto
->name
);
12012 return bfd_reloc_overflow
;
12015 /* Mask out the value and U bit. */
12016 insn
&= 0xff7ff0f0;
12018 /* Set the U bit if the value to go in the place is non-negative. */
12019 if (signed_value
>= 0)
12022 /* Encode the offset. */
12023 insn
|= ((residual
& 0xf0) << 4) | (residual
& 0xf);
12025 bfd_put_32 (input_bfd
, insn
, hit_data
);
12027 return bfd_reloc_ok
;
12029 case R_ARM_LDC_PC_G0
:
12030 case R_ARM_LDC_PC_G1
:
12031 case R_ARM_LDC_PC_G2
:
12032 case R_ARM_LDC_SB_G0
:
12033 case R_ARM_LDC_SB_G1
:
12034 case R_ARM_LDC_SB_G2
:
12036 bfd_vma insn
= bfd_get_32 (input_bfd
, hit_data
);
12037 bfd_vma pc
= input_section
->output_section
->vma
12038 + input_section
->output_offset
+ rel
->r_offset
;
12039 /* sb is the origin of the *segment* containing the symbol. */
12040 bfd_vma sb
= sym_sec
? sym_sec
->output_section
->vma
: 0;
12042 bfd_signed_vma signed_value
;
12045 /* Determine which groups of bits to calculate. */
12048 case R_ARM_LDC_PC_G0
:
12049 case R_ARM_LDC_SB_G0
:
12053 case R_ARM_LDC_PC_G1
:
12054 case R_ARM_LDC_SB_G1
:
12058 case R_ARM_LDC_PC_G2
:
12059 case R_ARM_LDC_SB_G2
:
12067 /* If REL, extract the addend from the insn. If RELA, it will
12068 have already been fetched for us. */
12069 if (globals
->use_rel
)
12071 int negative
= (insn
& (1 << 23)) ? 1 : -1;
12072 signed_addend
= negative
* ((insn
& 0xff) << 2);
12075 /* Compute the value (X) to go in the place. */
12076 if (r_type
== R_ARM_LDC_PC_G0
12077 || r_type
== R_ARM_LDC_PC_G1
12078 || r_type
== R_ARM_LDC_PC_G2
)
12080 signed_value
= value
- pc
+ signed_addend
;
12082 /* Section base relative. */
12083 signed_value
= value
- sb
+ signed_addend
;
12085 /* Calculate the value of the relevant G_{n-1} to obtain
12086 the residual at that stage. */
12087 calculate_group_reloc_mask (signed_value
< 0 ? - signed_value
: signed_value
,
12088 group
- 1, &residual
);
12090 /* Check for overflow. (The absolute value to go in the place must be
12091 divisible by four and, after having been divided by four, must
12092 fit in eight bits.) */
12093 if ((residual
& 0x3) != 0 || residual
>= 0x400)
12096 /* xgettext:c-format */
12097 (_("%B(%A+%#Lx): Overflow whilst splitting %#Lx for group relocation %s"),
12098 input_bfd
, input_section
, rel
->r_offset
,
12099 signed_value
< 0 ? -signed_value
: signed_value
, howto
->name
);
12100 return bfd_reloc_overflow
;
12103 /* Mask out the value and U bit. */
12104 insn
&= 0xff7fff00;
12106 /* Set the U bit if the value to go in the place is non-negative. */
12107 if (signed_value
>= 0)
12110 /* Encode the offset. */
12111 insn
|= residual
>> 2;
12113 bfd_put_32 (input_bfd
, insn
, hit_data
);
12115 return bfd_reloc_ok
;
12117 case R_ARM_THM_ALU_ABS_G0_NC
:
12118 case R_ARM_THM_ALU_ABS_G1_NC
:
12119 case R_ARM_THM_ALU_ABS_G2_NC
:
12120 case R_ARM_THM_ALU_ABS_G3_NC
:
12122 const int shift_array
[4] = {0, 8, 16, 24};
12123 bfd_vma insn
= bfd_get_16 (input_bfd
, hit_data
);
12124 bfd_vma addr
= value
;
12125 int shift
= shift_array
[r_type
- R_ARM_THM_ALU_ABS_G0_NC
];
12127 /* Compute address. */
12128 if (globals
->use_rel
)
12129 signed_addend
= insn
& 0xff;
12130 addr
+= signed_addend
;
12131 if (branch_type
== ST_BRANCH_TO_THUMB
)
12133 /* Clean imm8 insn. */
12135 /* And update with correct part of address. */
12136 insn
|= (addr
>> shift
) & 0xff;
12138 bfd_put_16 (input_bfd
, insn
, hit_data
);
12141 *unresolved_reloc_p
= FALSE
;
12142 return bfd_reloc_ok
;
12145 return bfd_reloc_notsupported
;
12149 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
12151 arm_add_to_rel (bfd
* abfd
,
12152 bfd_byte
* address
,
12153 reloc_howto_type
* howto
,
12154 bfd_signed_vma increment
)
12156 bfd_signed_vma addend
;
12158 if (howto
->type
== R_ARM_THM_CALL
12159 || howto
->type
== R_ARM_THM_JUMP24
)
12161 int upper_insn
, lower_insn
;
12164 upper_insn
= bfd_get_16 (abfd
, address
);
12165 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
12166 upper
= upper_insn
& 0x7ff;
12167 lower
= lower_insn
& 0x7ff;
12169 addend
= (upper
<< 12) | (lower
<< 1);
12170 addend
+= increment
;
12173 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
12174 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
12176 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
12177 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
12183 contents
= bfd_get_32 (abfd
, address
);
12185 /* Get the (signed) value from the instruction. */
12186 addend
= contents
& howto
->src_mask
;
12187 if (addend
& ((howto
->src_mask
+ 1) >> 1))
12189 bfd_signed_vma mask
;
12192 mask
&= ~ howto
->src_mask
;
12196 /* Add in the increment, (which is a byte value). */
12197 switch (howto
->type
)
12200 addend
+= increment
;
12207 addend
<<= howto
->size
;
12208 addend
+= increment
;
12210 /* Should we check for overflow here ? */
12212 /* Drop any undesired bits. */
12213 addend
>>= howto
->rightshift
;
12217 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
12219 bfd_put_32 (abfd
, contents
, address
);
12223 #define IS_ARM_TLS_RELOC(R_TYPE) \
12224 ((R_TYPE) == R_ARM_TLS_GD32 \
12225 || (R_TYPE) == R_ARM_TLS_LDO32 \
12226 || (R_TYPE) == R_ARM_TLS_LDM32 \
12227 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
12228 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
12229 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
12230 || (R_TYPE) == R_ARM_TLS_LE32 \
12231 || (R_TYPE) == R_ARM_TLS_IE32 \
12232 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
12234 /* Specific set of relocations for the gnu tls dialect. */
12235 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
12236 ((R_TYPE) == R_ARM_TLS_GOTDESC \
12237 || (R_TYPE) == R_ARM_TLS_CALL \
12238 || (R_TYPE) == R_ARM_THM_TLS_CALL \
12239 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
12240 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
12242 /* Relocate an ARM ELF section. */
12245 elf32_arm_relocate_section (bfd
* output_bfd
,
12246 struct bfd_link_info
* info
,
12248 asection
* input_section
,
12249 bfd_byte
* contents
,
12250 Elf_Internal_Rela
* relocs
,
12251 Elf_Internal_Sym
* local_syms
,
12252 asection
** local_sections
)
12254 Elf_Internal_Shdr
*symtab_hdr
;
12255 struct elf_link_hash_entry
**sym_hashes
;
12256 Elf_Internal_Rela
*rel
;
12257 Elf_Internal_Rela
*relend
;
12259 struct elf32_arm_link_hash_table
* globals
;
12261 globals
= elf32_arm_hash_table (info
);
12262 if (globals
== NULL
)
12265 symtab_hdr
= & elf_symtab_hdr (input_bfd
);
12266 sym_hashes
= elf_sym_hashes (input_bfd
);
12269 relend
= relocs
+ input_section
->reloc_count
;
12270 for (; rel
< relend
; rel
++)
12273 reloc_howto_type
* howto
;
12274 unsigned long r_symndx
;
12275 Elf_Internal_Sym
* sym
;
12277 struct elf_link_hash_entry
* h
;
12278 bfd_vma relocation
;
12279 bfd_reloc_status_type r
;
12282 bfd_boolean unresolved_reloc
= FALSE
;
12283 char *error_message
= NULL
;
12285 r_symndx
= ELF32_R_SYM (rel
->r_info
);
12286 r_type
= ELF32_R_TYPE (rel
->r_info
);
12287 r_type
= arm_real_reloc_type (globals
, r_type
);
12289 if ( r_type
== R_ARM_GNU_VTENTRY
12290 || r_type
== R_ARM_GNU_VTINHERIT
)
12293 howto
= bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
12296 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
12302 if (r_symndx
< symtab_hdr
->sh_info
)
12304 sym
= local_syms
+ r_symndx
;
12305 sym_type
= ELF32_ST_TYPE (sym
->st_info
);
12306 sec
= local_sections
[r_symndx
];
12308 /* An object file might have a reference to a local
12309 undefined symbol. This is a daft object file, but we
12310 should at least do something about it. V4BX & NONE
12311 relocations do not use the symbol and are explicitly
12312 allowed to use the undefined symbol, so allow those.
12313 Likewise for relocations against STN_UNDEF. */
12314 if (r_type
!= R_ARM_V4BX
12315 && r_type
!= R_ARM_NONE
12316 && r_symndx
!= STN_UNDEF
12317 && bfd_is_und_section (sec
)
12318 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
12319 (*info
->callbacks
->undefined_symbol
)
12320 (info
, bfd_elf_string_from_elf_section
12321 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
12322 input_bfd
, input_section
,
12323 rel
->r_offset
, TRUE
);
12325 if (globals
->use_rel
)
12327 relocation
= (sec
->output_section
->vma
12328 + sec
->output_offset
12330 if (!bfd_link_relocatable (info
)
12331 && (sec
->flags
& SEC_MERGE
)
12332 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
12335 bfd_vma addend
, value
;
12339 case R_ARM_MOVW_ABS_NC
:
12340 case R_ARM_MOVT_ABS
:
12341 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
12342 addend
= ((value
& 0xf0000) >> 4) | (value
& 0xfff);
12343 addend
= (addend
^ 0x8000) - 0x8000;
12346 case R_ARM_THM_MOVW_ABS_NC
:
12347 case R_ARM_THM_MOVT_ABS
:
12348 value
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
)
12350 value
|= bfd_get_16 (input_bfd
,
12351 contents
+ rel
->r_offset
+ 2);
12352 addend
= ((value
& 0xf7000) >> 4) | (value
& 0xff)
12353 | ((value
& 0x04000000) >> 15);
12354 addend
= (addend
^ 0x8000) - 0x8000;
12358 if (howto
->rightshift
12359 || (howto
->src_mask
& (howto
->src_mask
+ 1)))
12362 /* xgettext:c-format */
12363 (_("%B(%A+%#Lx): %s relocation against SEC_MERGE section"),
12364 input_bfd
, input_section
,
12365 rel
->r_offset
, howto
->name
);
12369 value
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
12371 /* Get the (signed) value from the instruction. */
12372 addend
= value
& howto
->src_mask
;
12373 if (addend
& ((howto
->src_mask
+ 1) >> 1))
12375 bfd_signed_vma mask
;
12378 mask
&= ~ howto
->src_mask
;
12386 _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
)
12388 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
12390 /* Cases here must match those in the preceding
12391 switch statement. */
12394 case R_ARM_MOVW_ABS_NC
:
12395 case R_ARM_MOVT_ABS
:
12396 value
= (value
& 0xfff0f000) | ((addend
& 0xf000) << 4)
12397 | (addend
& 0xfff);
12398 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
12401 case R_ARM_THM_MOVW_ABS_NC
:
12402 case R_ARM_THM_MOVT_ABS
:
12403 value
= (value
& 0xfbf08f00) | ((addend
& 0xf700) << 4)
12404 | (addend
& 0xff) | ((addend
& 0x0800) << 15);
12405 bfd_put_16 (input_bfd
, value
>> 16,
12406 contents
+ rel
->r_offset
);
12407 bfd_put_16 (input_bfd
, value
,
12408 contents
+ rel
->r_offset
+ 2);
12412 value
= (value
& ~ howto
->dst_mask
)
12413 | (addend
& howto
->dst_mask
);
12414 bfd_put_32 (input_bfd
, value
, contents
+ rel
->r_offset
);
12420 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
12424 bfd_boolean warned
, ignored
;
12426 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
12427 r_symndx
, symtab_hdr
, sym_hashes
,
12428 h
, sec
, relocation
,
12429 unresolved_reloc
, warned
, ignored
);
12431 sym_type
= h
->type
;
12434 if (sec
!= NULL
&& discarded_section (sec
))
12435 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
12436 rel
, 1, relend
, howto
, 0, contents
);
12438 if (bfd_link_relocatable (info
))
12440 /* This is a relocatable link. We don't have to change
12441 anything, unless the reloc is against a section symbol,
12442 in which case we have to adjust according to where the
12443 section symbol winds up in the output section. */
12444 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
12446 if (globals
->use_rel
)
12447 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
12448 howto
, (bfd_signed_vma
) sec
->output_offset
);
12450 rel
->r_addend
+= sec
->output_offset
;
12456 name
= h
->root
.root
.string
;
12459 name
= (bfd_elf_string_from_elf_section
12460 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
12461 if (name
== NULL
|| *name
== '\0')
12462 name
= bfd_section_name (input_bfd
, sec
);
12465 if (r_symndx
!= STN_UNDEF
12466 && r_type
!= R_ARM_NONE
12468 || h
->root
.type
== bfd_link_hash_defined
12469 || h
->root
.type
== bfd_link_hash_defweak
)
12470 && IS_ARM_TLS_RELOC (r_type
) != (sym_type
== STT_TLS
))
12473 ((sym_type
== STT_TLS
12474 /* xgettext:c-format */
12475 ? _("%B(%A+%#Lx): %s used with TLS symbol %s")
12476 /* xgettext:c-format */
12477 : _("%B(%A+%#Lx): %s used with non-TLS symbol %s")),
12485 /* We call elf32_arm_final_link_relocate unless we're completely
12486 done, i.e., the relaxation produced the final output we want,
12487 and we won't let anybody mess with it. Also, we have to do
12488 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
12489 both in relaxed and non-relaxed cases. */
12490 if ((elf32_arm_tls_transition (info
, r_type
, h
) != (unsigned)r_type
)
12491 || (IS_ARM_TLS_GNU_RELOC (r_type
)
12492 && !((h
? elf32_arm_hash_entry (h
)->tls_type
:
12493 elf32_arm_local_got_tls_type (input_bfd
)[r_symndx
])
12496 r
= elf32_arm_tls_relax (globals
, input_bfd
, input_section
,
12497 contents
, rel
, h
== NULL
);
12498 /* This may have been marked unresolved because it came from
12499 a shared library. But we've just dealt with that. */
12500 unresolved_reloc
= 0;
12503 r
= bfd_reloc_continue
;
12505 if (r
== bfd_reloc_continue
)
12507 unsigned char branch_type
=
12508 h
? ARM_GET_SYM_BRANCH_TYPE (h
->target_internal
)
12509 : ARM_GET_SYM_BRANCH_TYPE (sym
->st_target_internal
);
12511 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
12512 input_section
, contents
, rel
,
12513 relocation
, info
, sec
, name
,
12514 sym_type
, branch_type
, h
,
12519 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12520 because such sections are not SEC_ALLOC and thus ld.so will
12521 not process them. */
12522 if (unresolved_reloc
12523 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
12525 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
12526 rel
->r_offset
) != (bfd_vma
) -1)
12529 /* xgettext:c-format */
12530 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
12535 h
->root
.root
.string
);
12539 if (r
!= bfd_reloc_ok
)
12543 case bfd_reloc_overflow
:
12544 /* If the overflowing reloc was to an undefined symbol,
12545 we have already printed one error message and there
12546 is no point complaining again. */
12547 if (!h
|| h
->root
.type
!= bfd_link_hash_undefined
)
12548 (*info
->callbacks
->reloc_overflow
)
12549 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
12550 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
12553 case bfd_reloc_undefined
:
12554 (*info
->callbacks
->undefined_symbol
)
12555 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
12558 case bfd_reloc_outofrange
:
12559 error_message
= _("out of range");
12562 case bfd_reloc_notsupported
:
12563 error_message
= _("unsupported relocation");
12566 case bfd_reloc_dangerous
:
12567 /* error_message should already be set. */
12571 error_message
= _("unknown error");
12572 /* Fall through. */
12575 BFD_ASSERT (error_message
!= NULL
);
12576 (*info
->callbacks
->reloc_dangerous
)
12577 (info
, error_message
, input_bfd
, input_section
, rel
->r_offset
);
12586 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
12587 adds the edit to the start of the list. (The list must be built in order of
12588 ascending TINDEX: the function's callers are primarily responsible for
12589 maintaining that condition). */
12592 add_unwind_table_edit (arm_unwind_table_edit
**head
,
12593 arm_unwind_table_edit
**tail
,
12594 arm_unwind_edit_type type
,
12595 asection
*linked_section
,
12596 unsigned int tindex
)
12598 arm_unwind_table_edit
*new_edit
= (arm_unwind_table_edit
*)
12599 xmalloc (sizeof (arm_unwind_table_edit
));
12601 new_edit
->type
= type
;
12602 new_edit
->linked_section
= linked_section
;
12603 new_edit
->index
= tindex
;
12607 new_edit
->next
= NULL
;
12610 (*tail
)->next
= new_edit
;
12612 (*tail
) = new_edit
;
12615 (*head
) = new_edit
;
12619 new_edit
->next
= *head
;
12628 static _arm_elf_section_data
*get_arm_elf_section_data (asection
*);
12630 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
12632 adjust_exidx_size(asection
*exidx_sec
, int adjust
)
12636 if (!exidx_sec
->rawsize
)
12637 exidx_sec
->rawsize
= exidx_sec
->size
;
12639 bfd_set_section_size (exidx_sec
->owner
, exidx_sec
, exidx_sec
->size
+ adjust
);
12640 out_sec
= exidx_sec
->output_section
;
12641 /* Adjust size of output section. */
12642 bfd_set_section_size (out_sec
->owner
, out_sec
, out_sec
->size
+adjust
);
12645 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
12647 insert_cantunwind_after(asection
*text_sec
, asection
*exidx_sec
)
12649 struct _arm_elf_section_data
*exidx_arm_data
;
12651 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
12652 add_unwind_table_edit (
12653 &exidx_arm_data
->u
.exidx
.unwind_edit_list
,
12654 &exidx_arm_data
->u
.exidx
.unwind_edit_tail
,
12655 INSERT_EXIDX_CANTUNWIND_AT_END
, text_sec
, UINT_MAX
);
12657 exidx_arm_data
->additional_reloc_count
++;
12659 adjust_exidx_size(exidx_sec
, 8);
12662 /* Scan .ARM.exidx tables, and create a list describing edits which should be
12663 made to those tables, such that:
12665 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
12666 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
12667 codes which have been inlined into the index).
12669 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
12671 The edits are applied when the tables are written
12672 (in elf32_arm_write_section). */
12675 elf32_arm_fix_exidx_coverage (asection
**text_section_order
,
12676 unsigned int num_text_sections
,
12677 struct bfd_link_info
*info
,
12678 bfd_boolean merge_exidx_entries
)
12681 unsigned int last_second_word
= 0, i
;
12682 asection
*last_exidx_sec
= NULL
;
12683 asection
*last_text_sec
= NULL
;
12684 int last_unwind_type
= -1;
12686 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
12688 for (inp
= info
->input_bfds
; inp
!= NULL
; inp
= inp
->link
.next
)
12692 for (sec
= inp
->sections
; sec
!= NULL
; sec
= sec
->next
)
12694 struct bfd_elf_section_data
*elf_sec
= elf_section_data (sec
);
12695 Elf_Internal_Shdr
*hdr
= &elf_sec
->this_hdr
;
12697 if (!hdr
|| hdr
->sh_type
!= SHT_ARM_EXIDX
)
12700 if (elf_sec
->linked_to
)
12702 Elf_Internal_Shdr
*linked_hdr
12703 = &elf_section_data (elf_sec
->linked_to
)->this_hdr
;
12704 struct _arm_elf_section_data
*linked_sec_arm_data
12705 = get_arm_elf_section_data (linked_hdr
->bfd_section
);
12707 if (linked_sec_arm_data
== NULL
)
12710 /* Link this .ARM.exidx section back from the text section it
12712 linked_sec_arm_data
->u
.text
.arm_exidx_sec
= sec
;
12717 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
12718 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
12719 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
12721 for (i
= 0; i
< num_text_sections
; i
++)
12723 asection
*sec
= text_section_order
[i
];
12724 asection
*exidx_sec
;
12725 struct _arm_elf_section_data
*arm_data
= get_arm_elf_section_data (sec
);
12726 struct _arm_elf_section_data
*exidx_arm_data
;
12727 bfd_byte
*contents
= NULL
;
12728 int deleted_exidx_bytes
= 0;
12730 arm_unwind_table_edit
*unwind_edit_head
= NULL
;
12731 arm_unwind_table_edit
*unwind_edit_tail
= NULL
;
12732 Elf_Internal_Shdr
*hdr
;
12735 if (arm_data
== NULL
)
12738 exidx_sec
= arm_data
->u
.text
.arm_exidx_sec
;
12739 if (exidx_sec
== NULL
)
12741 /* Section has no unwind data. */
12742 if (last_unwind_type
== 0 || !last_exidx_sec
)
12745 /* Ignore zero sized sections. */
12746 if (sec
->size
== 0)
12749 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
12750 last_unwind_type
= 0;
12754 /* Skip /DISCARD/ sections. */
12755 if (bfd_is_abs_section (exidx_sec
->output_section
))
12758 hdr
= &elf_section_data (exidx_sec
)->this_hdr
;
12759 if (hdr
->sh_type
!= SHT_ARM_EXIDX
)
12762 exidx_arm_data
= get_arm_elf_section_data (exidx_sec
);
12763 if (exidx_arm_data
== NULL
)
12766 ibfd
= exidx_sec
->owner
;
12768 if (hdr
->contents
!= NULL
)
12769 contents
= hdr
->contents
;
12770 else if (! bfd_malloc_and_get_section (ibfd
, exidx_sec
, &contents
))
12774 if (last_unwind_type
> 0)
12776 unsigned int first_word
= bfd_get_32 (ibfd
, contents
);
12777 /* Add cantunwind if first unwind item does not match section
12779 if (first_word
!= sec
->vma
)
12781 insert_cantunwind_after (last_text_sec
, last_exidx_sec
);
12782 last_unwind_type
= 0;
12786 for (j
= 0; j
< hdr
->sh_size
; j
+= 8)
12788 unsigned int second_word
= bfd_get_32 (ibfd
, contents
+ j
+ 4);
12792 /* An EXIDX_CANTUNWIND entry. */
12793 if (second_word
== 1)
12795 if (last_unwind_type
== 0)
12799 /* Inlined unwinding data. Merge if equal to previous. */
12800 else if ((second_word
& 0x80000000) != 0)
12802 if (merge_exidx_entries
12803 && last_second_word
== second_word
&& last_unwind_type
== 1)
12806 last_second_word
= second_word
;
12808 /* Normal table entry. In theory we could merge these too,
12809 but duplicate entries are likely to be much less common. */
12813 if (elide
&& !bfd_link_relocatable (info
))
12815 add_unwind_table_edit (&unwind_edit_head
, &unwind_edit_tail
,
12816 DELETE_EXIDX_ENTRY
, NULL
, j
/ 8);
12818 deleted_exidx_bytes
+= 8;
12821 last_unwind_type
= unwind_type
;
12824 /* Free contents if we allocated it ourselves. */
12825 if (contents
!= hdr
->contents
)
12828 /* Record edits to be applied later (in elf32_arm_write_section). */
12829 exidx_arm_data
->u
.exidx
.unwind_edit_list
= unwind_edit_head
;
12830 exidx_arm_data
->u
.exidx
.unwind_edit_tail
= unwind_edit_tail
;
12832 if (deleted_exidx_bytes
> 0)
12833 adjust_exidx_size(exidx_sec
, -deleted_exidx_bytes
);
12835 last_exidx_sec
= exidx_sec
;
12836 last_text_sec
= sec
;
12839 /* Add terminating CANTUNWIND entry. */
12840 if (!bfd_link_relocatable (info
) && last_exidx_sec
12841 && last_unwind_type
!= 0)
12842 insert_cantunwind_after(last_text_sec
, last_exidx_sec
);
12848 elf32_arm_output_glue_section (struct bfd_link_info
*info
, bfd
*obfd
,
12849 bfd
*ibfd
, const char *name
)
12851 asection
*sec
, *osec
;
12853 sec
= bfd_get_linker_section (ibfd
, name
);
12854 if (sec
== NULL
|| (sec
->flags
& SEC_EXCLUDE
) != 0)
12857 osec
= sec
->output_section
;
12858 if (elf32_arm_write_section (obfd
, info
, sec
, sec
->contents
))
12861 if (! bfd_set_section_contents (obfd
, osec
, sec
->contents
,
12862 sec
->output_offset
, sec
->size
))
12869 elf32_arm_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
12871 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
12872 asection
*sec
, *osec
;
12874 if (globals
== NULL
)
12877 /* Invoke the regular ELF backend linker to do all the work. */
12878 if (!bfd_elf_final_link (abfd
, info
))
12881 /* Process stub sections (eg BE8 encoding, ...). */
12882 struct elf32_arm_link_hash_table
*htab
= elf32_arm_hash_table (info
);
12884 for (i
=0; i
<htab
->top_id
; i
++)
12886 sec
= htab
->stub_group
[i
].stub_sec
;
12887 /* Only process it once, in its link_sec slot. */
12888 if (sec
&& i
== htab
->stub_group
[i
].link_sec
->id
)
12890 osec
= sec
->output_section
;
12891 elf32_arm_write_section (abfd
, info
, sec
, sec
->contents
);
12892 if (! bfd_set_section_contents (abfd
, osec
, sec
->contents
,
12893 sec
->output_offset
, sec
->size
))
12898 /* Write out any glue sections now that we have created all the
12900 if (globals
->bfd_of_glue_owner
!= NULL
)
12902 if (! elf32_arm_output_glue_section (info
, abfd
,
12903 globals
->bfd_of_glue_owner
,
12904 ARM2THUMB_GLUE_SECTION_NAME
))
12907 if (! elf32_arm_output_glue_section (info
, abfd
,
12908 globals
->bfd_of_glue_owner
,
12909 THUMB2ARM_GLUE_SECTION_NAME
))
12912 if (! elf32_arm_output_glue_section (info
, abfd
,
12913 globals
->bfd_of_glue_owner
,
12914 VFP11_ERRATUM_VENEER_SECTION_NAME
))
12917 if (! elf32_arm_output_glue_section (info
, abfd
,
12918 globals
->bfd_of_glue_owner
,
12919 STM32L4XX_ERRATUM_VENEER_SECTION_NAME
))
12922 if (! elf32_arm_output_glue_section (info
, abfd
,
12923 globals
->bfd_of_glue_owner
,
12924 ARM_BX_GLUE_SECTION_NAME
))
12931 /* Return a best guess for the machine number based on the attributes. */
12933 static unsigned int
12934 bfd_arm_get_mach_from_attributes (bfd
* abfd
)
12936 int arch
= bfd_elf_get_obj_attr_int (abfd
, OBJ_ATTR_PROC
, Tag_CPU_arch
);
12940 case TAG_CPU_ARCH_V4
: return bfd_mach_arm_4
;
12941 case TAG_CPU_ARCH_V4T
: return bfd_mach_arm_4T
;
12942 case TAG_CPU_ARCH_V5T
: return bfd_mach_arm_5T
;
12944 case TAG_CPU_ARCH_V5TE
:
12948 BFD_ASSERT (Tag_CPU_name
< NUM_KNOWN_OBJ_ATTRIBUTES
);
12949 name
= elf_known_obj_attributes (abfd
) [OBJ_ATTR_PROC
][Tag_CPU_name
].s
;
12953 if (strcmp (name
, "IWMMXT2") == 0)
12954 return bfd_mach_arm_iWMMXt2
;
12956 if (strcmp (name
, "IWMMXT") == 0)
12957 return bfd_mach_arm_iWMMXt
;
12959 if (strcmp (name
, "XSCALE") == 0)
12963 BFD_ASSERT (Tag_WMMX_arch
< NUM_KNOWN_OBJ_ATTRIBUTES
);
12964 wmmx
= elf_known_obj_attributes (abfd
) [OBJ_ATTR_PROC
][Tag_WMMX_arch
].i
;
12967 case 1: return bfd_mach_arm_iWMMXt
;
12968 case 2: return bfd_mach_arm_iWMMXt2
;
12969 default: return bfd_mach_arm_XScale
;
12974 return bfd_mach_arm_5TE
;
12978 return bfd_mach_arm_unknown
;
12982 /* Set the right machine number. */
12985 elf32_arm_object_p (bfd
*abfd
)
12989 mach
= bfd_arm_get_mach_from_notes (abfd
, ARM_NOTE_SECTION
);
12991 if (mach
== bfd_mach_arm_unknown
)
12993 if (elf_elfheader (abfd
)->e_flags
& EF_ARM_MAVERICK_FLOAT
)
12994 mach
= bfd_mach_arm_ep9312
;
12996 mach
= bfd_arm_get_mach_from_attributes (abfd
);
12999 bfd_default_set_arch_mach (abfd
, bfd_arch_arm
, mach
);
13003 /* Function to keep ARM specific flags in the ELF header. */
13006 elf32_arm_set_private_flags (bfd
*abfd
, flagword flags
)
13008 if (elf_flags_init (abfd
)
13009 && elf_elfheader (abfd
)->e_flags
!= flags
)
13011 if (EF_ARM_EABI_VERSION (flags
) == EF_ARM_EABI_UNKNOWN
)
13013 if (flags
& EF_ARM_INTERWORK
)
13015 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
13019 (_("Warning: Clearing the interworking flag of %B due to outside request"),
13025 elf_elfheader (abfd
)->e_flags
= flags
;
13026 elf_flags_init (abfd
) = TRUE
;
13032 /* Copy backend specific data from one object module to another. */
13035 elf32_arm_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
13038 flagword out_flags
;
13040 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
13043 in_flags
= elf_elfheader (ibfd
)->e_flags
;
13044 out_flags
= elf_elfheader (obfd
)->e_flags
;
13046 if (elf_flags_init (obfd
)
13047 && EF_ARM_EABI_VERSION (out_flags
) == EF_ARM_EABI_UNKNOWN
13048 && in_flags
!= out_flags
)
13050 /* Cannot mix APCS26 and APCS32 code. */
13051 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
13054 /* Cannot mix float APCS and non-float APCS code. */
13055 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
13058 /* If the src and dest have different interworking flags
13059 then turn off the interworking bit. */
13060 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
13062 if (out_flags
& EF_ARM_INTERWORK
)
13064 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
13067 in_flags
&= ~EF_ARM_INTERWORK
;
13070 /* Likewise for PIC, though don't warn for this case. */
13071 if ((in_flags
& EF_ARM_PIC
) != (out_flags
& EF_ARM_PIC
))
13072 in_flags
&= ~EF_ARM_PIC
;
13075 elf_elfheader (obfd
)->e_flags
= in_flags
;
13076 elf_flags_init (obfd
) = TRUE
;
13078 return _bfd_elf_copy_private_bfd_data (ibfd
, obfd
);
13081 /* Values for Tag_ABI_PCS_R9_use. */
13090 /* Values for Tag_ABI_PCS_RW_data. */
13093 AEABI_PCS_RW_data_absolute
,
13094 AEABI_PCS_RW_data_PCrel
,
13095 AEABI_PCS_RW_data_SBrel
,
13096 AEABI_PCS_RW_data_unused
13099 /* Values for Tag_ABI_enum_size. */
13105 AEABI_enum_forced_wide
13108 /* Determine whether an object attribute tag takes an integer, a
13112 elf32_arm_obj_attrs_arg_type (int tag
)
13114 if (tag
== Tag_compatibility
)
13115 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_STR_VAL
;
13116 else if (tag
== Tag_nodefaults
)
13117 return ATTR_TYPE_FLAG_INT_VAL
| ATTR_TYPE_FLAG_NO_DEFAULT
;
13118 else if (tag
== Tag_CPU_raw_name
|| tag
== Tag_CPU_name
)
13119 return ATTR_TYPE_FLAG_STR_VAL
;
13121 return ATTR_TYPE_FLAG_INT_VAL
;
13123 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
13126 /* The ABI defines that Tag_conformance should be emitted first, and that
13127 Tag_nodefaults should be second (if either is defined). This sets those
13128 two positions, and bumps up the position of all the remaining tags to
13131 elf32_arm_obj_attrs_order (int num
)
13133 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
)
13134 return Tag_conformance
;
13135 if (num
== LEAST_KNOWN_OBJ_ATTRIBUTE
+ 1)
13136 return Tag_nodefaults
;
13137 if ((num
- 2) < Tag_nodefaults
)
13139 if ((num
- 1) < Tag_conformance
)
13144 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
13146 elf32_arm_obj_attrs_handle_unknown (bfd
*abfd
, int tag
)
13148 if ((tag
& 127) < 64)
13151 (_("%B: Unknown mandatory EABI object attribute %d"),
13153 bfd_set_error (bfd_error_bad_value
);
13159 (_("Warning: %B: Unknown EABI object attribute %d"),
13165 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
13166 Returns -1 if no architecture could be read. */
13169 get_secondary_compatible_arch (bfd
*abfd
)
13171 obj_attribute
*attr
=
13172 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
13174 /* Note: the tag and its argument below are uleb128 values, though
13175 currently-defined values fit in one byte for each. */
13177 && attr
->s
[0] == Tag_CPU_arch
13178 && (attr
->s
[1] & 128) != 128
13179 && attr
->s
[2] == 0)
13182 /* This tag is "safely ignorable", so don't complain if it looks funny. */
13186 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
13187 The tag is removed if ARCH is -1. */
13190 set_secondary_compatible_arch (bfd
*abfd
, int arch
)
13192 obj_attribute
*attr
=
13193 &elf_known_obj_attributes_proc (abfd
)[Tag_also_compatible_with
];
13201 /* Note: the tag and its argument below are uleb128 values, though
13202 currently-defined values fit in one byte for each. */
13204 attr
->s
= (char *) bfd_alloc (abfd
, 3);
13205 attr
->s
[0] = Tag_CPU_arch
;
13210 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
13214 tag_cpu_arch_combine (bfd
*ibfd
, int oldtag
, int *secondary_compat_out
,
13215 int newtag
, int secondary_compat
)
13217 #define T(X) TAG_CPU_ARCH_##X
13218 int tagl
, tagh
, result
;
13221 T(V6T2
), /* PRE_V4. */
13223 T(V6T2
), /* V4T. */
13224 T(V6T2
), /* V5T. */
13225 T(V6T2
), /* V5TE. */
13226 T(V6T2
), /* V5TEJ. */
13229 T(V6T2
) /* V6T2. */
13233 T(V6K
), /* PRE_V4. */
13237 T(V6K
), /* V5TE. */
13238 T(V6K
), /* V5TEJ. */
13240 T(V6KZ
), /* V6KZ. */
13246 T(V7
), /* PRE_V4. */
13251 T(V7
), /* V5TEJ. */
13264 T(V6K
), /* V5TE. */
13265 T(V6K
), /* V5TEJ. */
13267 T(V6KZ
), /* V6KZ. */
13271 T(V6_M
) /* V6_M. */
13273 const int v6s_m
[] =
13279 T(V6K
), /* V5TE. */
13280 T(V6K
), /* V5TEJ. */
13282 T(V6KZ
), /* V6KZ. */
13286 T(V6S_M
), /* V6_M. */
13287 T(V6S_M
) /* V6S_M. */
13289 const int v7e_m
[] =
13293 T(V7E_M
), /* V4T. */
13294 T(V7E_M
), /* V5T. */
13295 T(V7E_M
), /* V5TE. */
13296 T(V7E_M
), /* V5TEJ. */
13297 T(V7E_M
), /* V6. */
13298 T(V7E_M
), /* V6KZ. */
13299 T(V7E_M
), /* V6T2. */
13300 T(V7E_M
), /* V6K. */
13301 T(V7E_M
), /* V7. */
13302 T(V7E_M
), /* V6_M. */
13303 T(V7E_M
), /* V6S_M. */
13304 T(V7E_M
) /* V7E_M. */
13308 T(V8
), /* PRE_V4. */
13313 T(V8
), /* V5TEJ. */
13320 T(V8
), /* V6S_M. */
13321 T(V8
), /* V7E_M. */
13326 T(V8R
), /* PRE_V4. */
13330 T(V8R
), /* V5TE. */
13331 T(V8R
), /* V5TEJ. */
13333 T(V8R
), /* V6KZ. */
13334 T(V8R
), /* V6T2. */
13337 T(V8R
), /* V6_M. */
13338 T(V8R
), /* V6S_M. */
13339 T(V8R
), /* V7E_M. */
13343 const int v8m_baseline
[] =
13356 T(V8M_BASE
), /* V6_M. */
13357 T(V8M_BASE
), /* V6S_M. */
13361 T(V8M_BASE
) /* V8-M BASELINE. */
13363 const int v8m_mainline
[] =
13375 T(V8M_MAIN
), /* V7. */
13376 T(V8M_MAIN
), /* V6_M. */
13377 T(V8M_MAIN
), /* V6S_M. */
13378 T(V8M_MAIN
), /* V7E_M. */
13381 T(V8M_MAIN
), /* V8-M BASELINE. */
13382 T(V8M_MAIN
) /* V8-M MAINLINE. */
13384 const int v4t_plus_v6_m
[] =
13390 T(V5TE
), /* V5TE. */
13391 T(V5TEJ
), /* V5TEJ. */
13393 T(V6KZ
), /* V6KZ. */
13394 T(V6T2
), /* V6T2. */
13397 T(V6_M
), /* V6_M. */
13398 T(V6S_M
), /* V6S_M. */
13399 T(V7E_M
), /* V7E_M. */
13402 T(V8M_BASE
), /* V8-M BASELINE. */
13403 T(V8M_MAIN
), /* V8-M MAINLINE. */
13404 T(V4T_PLUS_V6_M
) /* V4T plus V6_M. */
13406 const int *comb
[] =
13418 /* Pseudo-architecture. */
13422 /* Check we've not got a higher architecture than we know about. */
13424 if (oldtag
> MAX_TAG_CPU_ARCH
|| newtag
> MAX_TAG_CPU_ARCH
)
13426 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd
);
13430 /* Override old tag if we have a Tag_also_compatible_with on the output. */
13432 if ((oldtag
== T(V6_M
) && *secondary_compat_out
== T(V4T
))
13433 || (oldtag
== T(V4T
) && *secondary_compat_out
== T(V6_M
)))
13434 oldtag
= T(V4T_PLUS_V6_M
);
13436 /* And override the new tag if we have a Tag_also_compatible_with on the
13439 if ((newtag
== T(V6_M
) && secondary_compat
== T(V4T
))
13440 || (newtag
== T(V4T
) && secondary_compat
== T(V6_M
)))
13441 newtag
= T(V4T_PLUS_V6_M
);
13443 tagl
= (oldtag
< newtag
) ? oldtag
: newtag
;
13444 result
= tagh
= (oldtag
> newtag
) ? oldtag
: newtag
;
13446 /* Architectures before V6KZ add features monotonically. */
13447 if (tagh
<= TAG_CPU_ARCH_V6KZ
)
13450 result
= comb
[tagh
- T(V6T2
)] ? comb
[tagh
- T(V6T2
)][tagl
] : -1;
13452 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
13453 as the canonical version. */
13454 if (result
== T(V4T_PLUS_V6_M
))
13457 *secondary_compat_out
= T(V6_M
);
13460 *secondary_compat_out
= -1;
13464 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
13465 ibfd
, oldtag
, newtag
);
13473 /* Query attributes object to see if integer divide instructions may be
13474 present in an object. */
13476 elf32_arm_attributes_accept_div (const obj_attribute
*attr
)
13478 int arch
= attr
[Tag_CPU_arch
].i
;
13479 int profile
= attr
[Tag_CPU_arch_profile
].i
;
13481 switch (attr
[Tag_DIV_use
].i
)
13484 /* Integer divide allowed if instruction contained in archetecture. */
13485 if (arch
== TAG_CPU_ARCH_V7
&& (profile
== 'R' || profile
== 'M'))
13487 else if (arch
>= TAG_CPU_ARCH_V7E_M
)
13493 /* Integer divide explicitly prohibited. */
13497 /* Unrecognised case - treat as allowing divide everywhere. */
13499 /* Integer divide allowed in ARM state. */
13504 /* Query attributes object to see if integer divide instructions are
13505 forbidden to be in the object. This is not the inverse of
13506 elf32_arm_attributes_accept_div. */
13508 elf32_arm_attributes_forbid_div (const obj_attribute
*attr
)
13510 return attr
[Tag_DIV_use
].i
== 1;
13513 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
13514 are conflicting attributes. */
13517 elf32_arm_merge_eabi_attributes (bfd
*ibfd
, struct bfd_link_info
*info
)
13519 bfd
*obfd
= info
->output_bfd
;
13520 obj_attribute
*in_attr
;
13521 obj_attribute
*out_attr
;
13522 /* Some tags have 0 = don't care, 1 = strong requirement,
13523 2 = weak requirement. */
13524 static const int order_021
[3] = {0, 2, 1};
13526 bfd_boolean result
= TRUE
;
13527 const char *sec_name
= get_elf_backend_data (ibfd
)->obj_attrs_section
;
13529 /* Skip the linker stubs file. This preserves previous behavior
13530 of accepting unknown attributes in the first input file - but
13532 if (ibfd
->flags
& BFD_LINKER_CREATED
)
13535 /* Skip any input that hasn't attribute section.
13536 This enables to link object files without attribute section with
13538 if (bfd_get_section_by_name (ibfd
, sec_name
) == NULL
)
13541 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
13543 /* This is the first object. Copy the attributes. */
13544 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
13546 out_attr
= elf_known_obj_attributes_proc (obfd
);
13548 /* Use the Tag_null value to indicate the attributes have been
13552 /* We do not output objects with Tag_MPextension_use_legacy - we move
13553 the attribute's value to Tag_MPextension_use. */
13554 if (out_attr
[Tag_MPextension_use_legacy
].i
!= 0)
13556 if (out_attr
[Tag_MPextension_use
].i
!= 0
13557 && out_attr
[Tag_MPextension_use_legacy
].i
13558 != out_attr
[Tag_MPextension_use
].i
)
13561 (_("Error: %B has both the current and legacy "
13562 "Tag_MPextension_use attributes"), ibfd
);
13566 out_attr
[Tag_MPextension_use
] =
13567 out_attr
[Tag_MPextension_use_legacy
];
13568 out_attr
[Tag_MPextension_use_legacy
].type
= 0;
13569 out_attr
[Tag_MPextension_use_legacy
].i
= 0;
13575 in_attr
= elf_known_obj_attributes_proc (ibfd
);
13576 out_attr
= elf_known_obj_attributes_proc (obfd
);
13577 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
13578 if (in_attr
[Tag_ABI_VFP_args
].i
!= out_attr
[Tag_ABI_VFP_args
].i
)
13580 /* Ignore mismatches if the object doesn't use floating point or is
13581 floating point ABI independent. */
13582 if (out_attr
[Tag_ABI_FP_number_model
].i
== AEABI_FP_number_model_none
13583 || (in_attr
[Tag_ABI_FP_number_model
].i
!= AEABI_FP_number_model_none
13584 && out_attr
[Tag_ABI_VFP_args
].i
== AEABI_VFP_args_compatible
))
13585 out_attr
[Tag_ABI_VFP_args
].i
= in_attr
[Tag_ABI_VFP_args
].i
;
13586 else if (in_attr
[Tag_ABI_FP_number_model
].i
!= AEABI_FP_number_model_none
13587 && in_attr
[Tag_ABI_VFP_args
].i
!= AEABI_VFP_args_compatible
)
13590 (_("error: %B uses VFP register arguments, %B does not"),
13591 in_attr
[Tag_ABI_VFP_args
].i
? ibfd
: obfd
,
13592 in_attr
[Tag_ABI_VFP_args
].i
? obfd
: ibfd
);
13597 for (i
= LEAST_KNOWN_OBJ_ATTRIBUTE
; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
13599 /* Merge this attribute with existing attributes. */
13602 case Tag_CPU_raw_name
:
13604 /* These are merged after Tag_CPU_arch. */
13607 case Tag_ABI_optimization_goals
:
13608 case Tag_ABI_FP_optimization_goals
:
13609 /* Use the first value seen. */
13614 int secondary_compat
= -1, secondary_compat_out
= -1;
13615 unsigned int saved_out_attr
= out_attr
[i
].i
;
13617 static const char *name_table
[] =
13619 /* These aren't real CPU names, but we can't guess
13620 that from the architecture version alone. */
13636 "ARM v8-M.baseline",
13637 "ARM v8-M.mainline",
13640 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
13641 secondary_compat
= get_secondary_compatible_arch (ibfd
);
13642 secondary_compat_out
= get_secondary_compatible_arch (obfd
);
13643 arch_attr
= tag_cpu_arch_combine (ibfd
, out_attr
[i
].i
,
13644 &secondary_compat_out
,
13648 /* Return with error if failed to merge. */
13649 if (arch_attr
== -1)
13652 out_attr
[i
].i
= arch_attr
;
13654 set_secondary_compatible_arch (obfd
, secondary_compat_out
);
13656 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
13657 if (out_attr
[i
].i
== saved_out_attr
)
13658 ; /* Leave the names alone. */
13659 else if (out_attr
[i
].i
== in_attr
[i
].i
)
13661 /* The output architecture has been changed to match the
13662 input architecture. Use the input names. */
13663 out_attr
[Tag_CPU_name
].s
= in_attr
[Tag_CPU_name
].s
13664 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_name
].s
)
13666 out_attr
[Tag_CPU_raw_name
].s
= in_attr
[Tag_CPU_raw_name
].s
13667 ? _bfd_elf_attr_strdup (obfd
, in_attr
[Tag_CPU_raw_name
].s
)
13672 out_attr
[Tag_CPU_name
].s
= NULL
;
13673 out_attr
[Tag_CPU_raw_name
].s
= NULL
;
13676 /* If we still don't have a value for Tag_CPU_name,
13677 make one up now. Tag_CPU_raw_name remains blank. */
13678 if (out_attr
[Tag_CPU_name
].s
== NULL
13679 && out_attr
[i
].i
< ARRAY_SIZE (name_table
))
13680 out_attr
[Tag_CPU_name
].s
=
13681 _bfd_elf_attr_strdup (obfd
, name_table
[out_attr
[i
].i
]);
13685 case Tag_ARM_ISA_use
:
13686 case Tag_THUMB_ISA_use
:
13687 case Tag_WMMX_arch
:
13688 case Tag_Advanced_SIMD_arch
:
13689 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
13690 case Tag_ABI_FP_rounding
:
13691 case Tag_ABI_FP_exceptions
:
13692 case Tag_ABI_FP_user_exceptions
:
13693 case Tag_ABI_FP_number_model
:
13694 case Tag_FP_HP_extension
:
13695 case Tag_CPU_unaligned_access
:
13697 case Tag_MPextension_use
:
13698 /* Use the largest value specified. */
13699 if (in_attr
[i
].i
> out_attr
[i
].i
)
13700 out_attr
[i
].i
= in_attr
[i
].i
;
13703 case Tag_ABI_align_preserved
:
13704 case Tag_ABI_PCS_RO_data
:
13705 /* Use the smallest value specified. */
13706 if (in_attr
[i
].i
< out_attr
[i
].i
)
13707 out_attr
[i
].i
= in_attr
[i
].i
;
13710 case Tag_ABI_align_needed
:
13711 if ((in_attr
[i
].i
> 0 || out_attr
[i
].i
> 0)
13712 && (in_attr
[Tag_ABI_align_preserved
].i
== 0
13713 || out_attr
[Tag_ABI_align_preserved
].i
== 0))
13715 /* This error message should be enabled once all non-conformant
13716 binaries in the toolchain have had the attributes set
13719 (_("error: %B: 8-byte data alignment conflicts with %B"),
13723 /* Fall through. */
13724 case Tag_ABI_FP_denormal
:
13725 case Tag_ABI_PCS_GOT_use
:
13726 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
13727 value if greater than 2 (for future-proofing). */
13728 if ((in_attr
[i
].i
> 2 && in_attr
[i
].i
> out_attr
[i
].i
)
13729 || (in_attr
[i
].i
<= 2 && out_attr
[i
].i
<= 2
13730 && order_021
[in_attr
[i
].i
] > order_021
[out_attr
[i
].i
]))
13731 out_attr
[i
].i
= in_attr
[i
].i
;
13734 case Tag_Virtualization_use
:
13735 /* The virtualization tag effectively stores two bits of
13736 information: the intended use of TrustZone (in bit 0), and the
13737 intended use of Virtualization (in bit 1). */
13738 if (out_attr
[i
].i
== 0)
13739 out_attr
[i
].i
= in_attr
[i
].i
;
13740 else if (in_attr
[i
].i
!= 0
13741 && in_attr
[i
].i
!= out_attr
[i
].i
)
13743 if (in_attr
[i
].i
<= 3 && out_attr
[i
].i
<= 3)
13748 (_("error: %B: unable to merge virtualization attributes "
13756 case Tag_CPU_arch_profile
:
13757 if (out_attr
[i
].i
!= in_attr
[i
].i
)
13759 /* 0 will merge with anything.
13760 'A' and 'S' merge to 'A'.
13761 'R' and 'S' merge to 'R'.
13762 'M' and 'A|R|S' is an error. */
13763 if (out_attr
[i
].i
== 0
13764 || (out_attr
[i
].i
== 'S'
13765 && (in_attr
[i
].i
== 'A' || in_attr
[i
].i
== 'R')))
13766 out_attr
[i
].i
= in_attr
[i
].i
;
13767 else if (in_attr
[i
].i
== 0
13768 || (in_attr
[i
].i
== 'S'
13769 && (out_attr
[i
].i
== 'A' || out_attr
[i
].i
== 'R')))
13770 ; /* Do nothing. */
13774 (_("error: %B: Conflicting architecture profiles %c/%c"),
13776 in_attr
[i
].i
? in_attr
[i
].i
: '0',
13777 out_attr
[i
].i
? out_attr
[i
].i
: '0');
13783 case Tag_DSP_extension
:
13784 /* No need to change output value if any of:
13785 - pre (<=) ARMv5T input architecture (do not have DSP)
13786 - M input profile not ARMv7E-M and do not have DSP. */
13787 if (in_attr
[Tag_CPU_arch
].i
<= 3
13788 || (in_attr
[Tag_CPU_arch_profile
].i
== 'M'
13789 && in_attr
[Tag_CPU_arch
].i
!= 13
13790 && in_attr
[i
].i
== 0))
13791 ; /* Do nothing. */
13792 /* Output value should be 0 if DSP part of architecture, ie.
13793 - post (>=) ARMv5te architecture output
13794 - A, R or S profile output or ARMv7E-M output architecture. */
13795 else if (out_attr
[Tag_CPU_arch
].i
>= 4
13796 && (out_attr
[Tag_CPU_arch_profile
].i
== 'A'
13797 || out_attr
[Tag_CPU_arch_profile
].i
== 'R'
13798 || out_attr
[Tag_CPU_arch_profile
].i
== 'S'
13799 || out_attr
[Tag_CPU_arch
].i
== 13))
13801 /* Otherwise, DSP instructions are added and not part of output
13809 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
13810 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
13811 when it's 0. It might mean absence of FP hardware if
13812 Tag_FP_arch is zero. */
13814 #define VFP_VERSION_COUNT 9
13815 static const struct
13819 } vfp_versions
[VFP_VERSION_COUNT
] =
13835 /* If the output has no requirement about FP hardware,
13836 follow the requirement of the input. */
13837 if (out_attr
[i
].i
== 0)
13839 /* This assert is still reasonable, we shouldn't
13840 produce the suspicious build attribute
13841 combination (See below for in_attr). */
13842 BFD_ASSERT (out_attr
[Tag_ABI_HardFP_use
].i
== 0);
13843 out_attr
[i
].i
= in_attr
[i
].i
;
13844 out_attr
[Tag_ABI_HardFP_use
].i
13845 = in_attr
[Tag_ABI_HardFP_use
].i
;
13848 /* If the input has no requirement about FP hardware, do
13850 else if (in_attr
[i
].i
== 0)
13852 /* We used to assert that Tag_ABI_HardFP_use was
13853 zero here, but we should never assert when
13854 consuming an object file that has suspicious
13855 build attributes. The single precision variant
13856 of 'no FP architecture' is still 'no FP
13857 architecture', so we just ignore the tag in this
13862 /* Both the input and the output have nonzero Tag_FP_arch.
13863 So Tag_ABI_HardFP_use is implied by Tag_FP_arch when it's zero. */
13865 /* If both the input and the output have zero Tag_ABI_HardFP_use,
13867 if (in_attr
[Tag_ABI_HardFP_use
].i
== 0
13868 && out_attr
[Tag_ABI_HardFP_use
].i
== 0)
13870 /* If the input and the output have different Tag_ABI_HardFP_use,
13871 the combination of them is 0 (implied by Tag_FP_arch). */
13872 else if (in_attr
[Tag_ABI_HardFP_use
].i
13873 != out_attr
[Tag_ABI_HardFP_use
].i
)
13874 out_attr
[Tag_ABI_HardFP_use
].i
= 0;
13876 /* Now we can handle Tag_FP_arch. */
13878 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
13879 pick the biggest. */
13880 if (in_attr
[i
].i
>= VFP_VERSION_COUNT
13881 && in_attr
[i
].i
> out_attr
[i
].i
)
13883 out_attr
[i
] = in_attr
[i
];
13886 /* The output uses the superset of input features
13887 (ISA version) and registers. */
13888 ver
= vfp_versions
[in_attr
[i
].i
].ver
;
13889 if (ver
< vfp_versions
[out_attr
[i
].i
].ver
)
13890 ver
= vfp_versions
[out_attr
[i
].i
].ver
;
13891 regs
= vfp_versions
[in_attr
[i
].i
].regs
;
13892 if (regs
< vfp_versions
[out_attr
[i
].i
].regs
)
13893 regs
= vfp_versions
[out_attr
[i
].i
].regs
;
13894 /* This assumes all possible supersets are also a valid
13896 for (newval
= VFP_VERSION_COUNT
- 1; newval
> 0; newval
--)
13898 if (regs
== vfp_versions
[newval
].regs
13899 && ver
== vfp_versions
[newval
].ver
)
13902 out_attr
[i
].i
= newval
;
13905 case Tag_PCS_config
:
13906 if (out_attr
[i
].i
== 0)
13907 out_attr
[i
].i
= in_attr
[i
].i
;
13908 else if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= in_attr
[i
].i
)
13910 /* It's sometimes ok to mix different configs, so this is only
13913 (_("Warning: %B: Conflicting platform configuration"), ibfd
);
13916 case Tag_ABI_PCS_R9_use
:
13917 if (in_attr
[i
].i
!= out_attr
[i
].i
13918 && out_attr
[i
].i
!= AEABI_R9_unused
13919 && in_attr
[i
].i
!= AEABI_R9_unused
)
13922 (_("error: %B: Conflicting use of R9"), ibfd
);
13925 if (out_attr
[i
].i
== AEABI_R9_unused
)
13926 out_attr
[i
].i
= in_attr
[i
].i
;
13928 case Tag_ABI_PCS_RW_data
:
13929 if (in_attr
[i
].i
== AEABI_PCS_RW_data_SBrel
13930 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_SB
13931 && out_attr
[Tag_ABI_PCS_R9_use
].i
!= AEABI_R9_unused
)
13934 (_("error: %B: SB relative addressing conflicts with use of R9"),
13938 /* Use the smallest value specified. */
13939 if (in_attr
[i
].i
< out_attr
[i
].i
)
13940 out_attr
[i
].i
= in_attr
[i
].i
;
13942 case Tag_ABI_PCS_wchar_t
:
13943 if (out_attr
[i
].i
&& in_attr
[i
].i
&& out_attr
[i
].i
!= in_attr
[i
].i
13944 && !elf_arm_tdata (obfd
)->no_wchar_size_warning
)
13947 (_("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"),
13948 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
13950 else if (in_attr
[i
].i
&& !out_attr
[i
].i
)
13951 out_attr
[i
].i
= in_attr
[i
].i
;
13953 case Tag_ABI_enum_size
:
13954 if (in_attr
[i
].i
!= AEABI_enum_unused
)
13956 if (out_attr
[i
].i
== AEABI_enum_unused
13957 || out_attr
[i
].i
== AEABI_enum_forced_wide
)
13959 /* The existing object is compatible with anything.
13960 Use whatever requirements the new object has. */
13961 out_attr
[i
].i
= in_attr
[i
].i
;
13963 else if (in_attr
[i
].i
!= AEABI_enum_forced_wide
13964 && out_attr
[i
].i
!= in_attr
[i
].i
13965 && !elf_arm_tdata (obfd
)->no_enum_size_warning
)
13967 static const char *aeabi_enum_names
[] =
13968 { "", "variable-size", "32-bit", "" };
13969 const char *in_name
=
13970 in_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
13971 ? aeabi_enum_names
[in_attr
[i
].i
]
13973 const char *out_name
=
13974 out_attr
[i
].i
< ARRAY_SIZE(aeabi_enum_names
)
13975 ? aeabi_enum_names
[out_attr
[i
].i
]
13978 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
13979 ibfd
, in_name
, out_name
);
13983 case Tag_ABI_VFP_args
:
13986 case Tag_ABI_WMMX_args
:
13987 if (in_attr
[i
].i
!= out_attr
[i
].i
)
13990 (_("error: %B uses iWMMXt register arguments, %B does not"),
13995 case Tag_compatibility
:
13996 /* Merged in target-independent code. */
13998 case Tag_ABI_HardFP_use
:
13999 /* This is handled along with Tag_FP_arch. */
14001 case Tag_ABI_FP_16bit_format
:
14002 if (in_attr
[i
].i
!= 0 && out_attr
[i
].i
!= 0)
14004 if (in_attr
[i
].i
!= out_attr
[i
].i
)
14007 (_("error: fp16 format mismatch between %B and %B"),
14012 if (in_attr
[i
].i
!= 0)
14013 out_attr
[i
].i
= in_attr
[i
].i
;
14017 /* A value of zero on input means that the divide instruction may
14018 be used if available in the base architecture as specified via
14019 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
14020 the user did not want divide instructions. A value of 2
14021 explicitly means that divide instructions were allowed in ARM
14022 and Thumb state. */
14023 if (in_attr
[i
].i
== out_attr
[i
].i
)
14024 /* Do nothing. */ ;
14025 else if (elf32_arm_attributes_forbid_div (in_attr
)
14026 && !elf32_arm_attributes_accept_div (out_attr
))
14028 else if (elf32_arm_attributes_forbid_div (out_attr
)
14029 && elf32_arm_attributes_accept_div (in_attr
))
14030 out_attr
[i
].i
= in_attr
[i
].i
;
14031 else if (in_attr
[i
].i
== 2)
14032 out_attr
[i
].i
= in_attr
[i
].i
;
14035 case Tag_MPextension_use_legacy
:
14036 /* We don't output objects with Tag_MPextension_use_legacy - we
14037 move the value to Tag_MPextension_use. */
14038 if (in_attr
[i
].i
!= 0 && in_attr
[Tag_MPextension_use
].i
!= 0)
14040 if (in_attr
[Tag_MPextension_use
].i
!= in_attr
[i
].i
)
14043 (_("%B has both the current and legacy "
14044 "Tag_MPextension_use attributes"),
14050 if (in_attr
[i
].i
> out_attr
[Tag_MPextension_use
].i
)
14051 out_attr
[Tag_MPextension_use
] = in_attr
[i
];
14055 case Tag_nodefaults
:
14056 /* This tag is set if it exists, but the value is unused (and is
14057 typically zero). We don't actually need to do anything here -
14058 the merge happens automatically when the type flags are merged
14061 case Tag_also_compatible_with
:
14062 /* Already done in Tag_CPU_arch. */
14064 case Tag_conformance
:
14065 /* Keep the attribute if it matches. Throw it away otherwise.
14066 No attribute means no claim to conform. */
14067 if (!in_attr
[i
].s
|| !out_attr
[i
].s
14068 || strcmp (in_attr
[i
].s
, out_attr
[i
].s
) != 0)
14069 out_attr
[i
].s
= NULL
;
14074 = result
&& _bfd_elf_merge_unknown_attribute_low (ibfd
, obfd
, i
);
14077 /* If out_attr was copied from in_attr then it won't have a type yet. */
14078 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
14079 out_attr
[i
].type
= in_attr
[i
].type
;
14082 /* Merge Tag_compatibility attributes and any common GNU ones. */
14083 if (!_bfd_elf_merge_object_attributes (ibfd
, info
))
14086 /* Check for any attributes not known on ARM. */
14087 result
&= _bfd_elf_merge_unknown_attribute_list (ibfd
, obfd
);
14093 /* Return TRUE if the two EABI versions are incompatible. */
14096 elf32_arm_versions_compatible (unsigned iver
, unsigned over
)
14098 /* v4 and v5 are the same spec before and after it was released,
14099 so allow mixing them. */
14100 if ((iver
== EF_ARM_EABI_VER4
&& over
== EF_ARM_EABI_VER5
)
14101 || (iver
== EF_ARM_EABI_VER5
&& over
== EF_ARM_EABI_VER4
))
14104 return (iver
== over
);
14107 /* Merge backend specific data from an object file to the output
14108 object file when linking. */
14111 elf32_arm_merge_private_bfd_data (bfd
*, struct bfd_link_info
*);
14113 /* Display the flags field. */
14116 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
14118 FILE * file
= (FILE *) ptr
;
14119 unsigned long flags
;
14121 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
14123 /* Print normal ELF private data. */
14124 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
14126 flags
= elf_elfheader (abfd
)->e_flags
;
14127 /* Ignore init flag - it may not be set, despite the flags field
14128 containing valid data. */
14130 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
14132 switch (EF_ARM_EABI_VERSION (flags
))
14134 case EF_ARM_EABI_UNKNOWN
:
14135 /* The following flag bits are GNU extensions and not part of the
14136 official ARM ELF extended ABI. Hence they are only decoded if
14137 the EABI version is not set. */
14138 if (flags
& EF_ARM_INTERWORK
)
14139 fprintf (file
, _(" [interworking enabled]"));
14141 if (flags
& EF_ARM_APCS_26
)
14142 fprintf (file
, " [APCS-26]");
14144 fprintf (file
, " [APCS-32]");
14146 if (flags
& EF_ARM_VFP_FLOAT
)
14147 fprintf (file
, _(" [VFP float format]"));
14148 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
14149 fprintf (file
, _(" [Maverick float format]"));
14151 fprintf (file
, _(" [FPA float format]"));
14153 if (flags
& EF_ARM_APCS_FLOAT
)
14154 fprintf (file
, _(" [floats passed in float registers]"));
14156 if (flags
& EF_ARM_PIC
)
14157 fprintf (file
, _(" [position independent]"));
14159 if (flags
& EF_ARM_NEW_ABI
)
14160 fprintf (file
, _(" [new ABI]"));
14162 if (flags
& EF_ARM_OLD_ABI
)
14163 fprintf (file
, _(" [old ABI]"));
14165 if (flags
& EF_ARM_SOFT_FLOAT
)
14166 fprintf (file
, _(" [software FP]"));
14168 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
14169 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
14170 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
14171 | EF_ARM_MAVERICK_FLOAT
);
14174 case EF_ARM_EABI_VER1
:
14175 fprintf (file
, _(" [Version1 EABI]"));
14177 if (flags
& EF_ARM_SYMSARESORTED
)
14178 fprintf (file
, _(" [sorted symbol table]"));
14180 fprintf (file
, _(" [unsorted symbol table]"));
14182 flags
&= ~ EF_ARM_SYMSARESORTED
;
14185 case EF_ARM_EABI_VER2
:
14186 fprintf (file
, _(" [Version2 EABI]"));
14188 if (flags
& EF_ARM_SYMSARESORTED
)
14189 fprintf (file
, _(" [sorted symbol table]"));
14191 fprintf (file
, _(" [unsorted symbol table]"));
14193 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
14194 fprintf (file
, _(" [dynamic symbols use segment index]"));
14196 if (flags
& EF_ARM_MAPSYMSFIRST
)
14197 fprintf (file
, _(" [mapping symbols precede others]"));
14199 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
14200 | EF_ARM_MAPSYMSFIRST
);
14203 case EF_ARM_EABI_VER3
:
14204 fprintf (file
, _(" [Version3 EABI]"));
14207 case EF_ARM_EABI_VER4
:
14208 fprintf (file
, _(" [Version4 EABI]"));
14211 case EF_ARM_EABI_VER5
:
14212 fprintf (file
, _(" [Version5 EABI]"));
14214 if (flags
& EF_ARM_ABI_FLOAT_SOFT
)
14215 fprintf (file
, _(" [soft-float ABI]"));
14217 if (flags
& EF_ARM_ABI_FLOAT_HARD
)
14218 fprintf (file
, _(" [hard-float ABI]"));
14220 flags
&= ~(EF_ARM_ABI_FLOAT_SOFT
| EF_ARM_ABI_FLOAT_HARD
);
14223 if (flags
& EF_ARM_BE8
)
14224 fprintf (file
, _(" [BE8]"));
14226 if (flags
& EF_ARM_LE8
)
14227 fprintf (file
, _(" [LE8]"));
14229 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
14233 fprintf (file
, _(" <EABI version unrecognised>"));
14237 flags
&= ~ EF_ARM_EABIMASK
;
14239 if (flags
& EF_ARM_RELEXEC
)
14240 fprintf (file
, _(" [relocatable executable]"));
14242 flags
&= ~EF_ARM_RELEXEC
;
14245 fprintf (file
, _("<Unrecognised flag bits set>"));
14247 fputc ('\n', file
);
14253 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
14255 switch (ELF_ST_TYPE (elf_sym
->st_info
))
14257 case STT_ARM_TFUNC
:
14258 return ELF_ST_TYPE (elf_sym
->st_info
);
14260 case STT_ARM_16BIT
:
14261 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
14262 This allows us to distinguish between data used by Thumb instructions
14263 and non-data (which is probably code) inside Thumb regions of an
14265 if (type
!= STT_OBJECT
&& type
!= STT_TLS
)
14266 return ELF_ST_TYPE (elf_sym
->st_info
);
14277 elf32_arm_gc_mark_hook (asection
*sec
,
14278 struct bfd_link_info
*info
,
14279 Elf_Internal_Rela
*rel
,
14280 struct elf_link_hash_entry
*h
,
14281 Elf_Internal_Sym
*sym
)
14284 switch (ELF32_R_TYPE (rel
->r_info
))
14286 case R_ARM_GNU_VTINHERIT
:
14287 case R_ARM_GNU_VTENTRY
:
14291 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
14294 /* Update the got entry reference counts for the section being removed. */
14297 elf32_arm_gc_sweep_hook (bfd
* abfd
,
14298 struct bfd_link_info
* info
,
14300 const Elf_Internal_Rela
* relocs
)
14302 Elf_Internal_Shdr
*symtab_hdr
;
14303 struct elf_link_hash_entry
**sym_hashes
;
14304 bfd_signed_vma
*local_got_refcounts
;
14305 const Elf_Internal_Rela
*rel
, *relend
;
14306 struct elf32_arm_link_hash_table
* globals
;
14308 if (bfd_link_relocatable (info
))
14311 globals
= elf32_arm_hash_table (info
);
14312 if (globals
== NULL
)
14315 elf_section_data (sec
)->local_dynrel
= NULL
;
14317 symtab_hdr
= & elf_symtab_hdr (abfd
);
14318 sym_hashes
= elf_sym_hashes (abfd
);
14319 local_got_refcounts
= elf_local_got_refcounts (abfd
);
14321 check_use_blx (globals
);
14323 relend
= relocs
+ sec
->reloc_count
;
14324 for (rel
= relocs
; rel
< relend
; rel
++)
14326 unsigned long r_symndx
;
14327 struct elf_link_hash_entry
*h
= NULL
;
14328 struct elf32_arm_link_hash_entry
*eh
;
14330 bfd_boolean call_reloc_p
;
14331 bfd_boolean may_become_dynamic_p
;
14332 bfd_boolean may_need_local_target_p
;
14333 union gotplt_union
*root_plt
;
14334 struct arm_plt_info
*arm_plt
;
14336 r_symndx
= ELF32_R_SYM (rel
->r_info
);
14337 if (r_symndx
>= symtab_hdr
->sh_info
)
14339 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
14340 while (h
->root
.type
== bfd_link_hash_indirect
14341 || h
->root
.type
== bfd_link_hash_warning
)
14342 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14344 eh
= (struct elf32_arm_link_hash_entry
*) h
;
14346 call_reloc_p
= FALSE
;
14347 may_become_dynamic_p
= FALSE
;
14348 may_need_local_target_p
= FALSE
;
14350 r_type
= ELF32_R_TYPE (rel
->r_info
);
14351 r_type
= arm_real_reloc_type (globals
, r_type
);
14355 case R_ARM_GOT_PREL
:
14356 case R_ARM_TLS_GD32
:
14357 case R_ARM_TLS_IE32
:
14360 if (h
->got
.refcount
> 0)
14361 h
->got
.refcount
-= 1;
14363 else if (local_got_refcounts
!= NULL
)
14365 if (local_got_refcounts
[r_symndx
] > 0)
14366 local_got_refcounts
[r_symndx
] -= 1;
14370 case R_ARM_TLS_LDM32
:
14371 globals
->tls_ldm_got
.refcount
-= 1;
14379 case R_ARM_THM_CALL
:
14380 case R_ARM_THM_JUMP24
:
14381 case R_ARM_THM_JUMP19
:
14382 call_reloc_p
= TRUE
;
14383 may_need_local_target_p
= TRUE
;
14387 if (!globals
->vxworks_p
)
14389 may_need_local_target_p
= TRUE
;
14392 /* Fall through. */
14394 case R_ARM_ABS32_NOI
:
14396 case R_ARM_REL32_NOI
:
14397 case R_ARM_MOVW_ABS_NC
:
14398 case R_ARM_MOVT_ABS
:
14399 case R_ARM_MOVW_PREL_NC
:
14400 case R_ARM_MOVT_PREL
:
14401 case R_ARM_THM_MOVW_ABS_NC
:
14402 case R_ARM_THM_MOVT_ABS
:
14403 case R_ARM_THM_MOVW_PREL_NC
:
14404 case R_ARM_THM_MOVT_PREL
:
14405 /* Should the interworking branches be here also? */
14406 if ((bfd_link_pic (info
) || globals
->root
.is_relocatable_executable
)
14407 && (sec
->flags
& SEC_ALLOC
) != 0)
14410 && elf32_arm_howto_from_type (r_type
)->pc_relative
)
14412 call_reloc_p
= TRUE
;
14413 may_need_local_target_p
= TRUE
;
14416 may_become_dynamic_p
= TRUE
;
14419 may_need_local_target_p
= TRUE
;
14426 if (may_need_local_target_p
14427 && elf32_arm_get_plt_info (abfd
, globals
, eh
, r_symndx
, &root_plt
,
14430 /* If PLT refcount book-keeping is wrong and too low, we'll
14431 see a zero value (going to -1) for the root PLT reference
14433 if (root_plt
->refcount
>= 0)
14435 BFD_ASSERT (root_plt
->refcount
!= 0);
14436 root_plt
->refcount
-= 1;
14439 /* A value of -1 means the symbol has become local, forced
14440 or seeing a hidden definition. Any other negative value
14442 BFD_ASSERT (root_plt
->refcount
== -1);
14445 arm_plt
->noncall_refcount
--;
14447 if (r_type
== R_ARM_THM_CALL
)
14448 arm_plt
->maybe_thumb_refcount
--;
14450 if (r_type
== R_ARM_THM_JUMP24
14451 || r_type
== R_ARM_THM_JUMP19
)
14452 arm_plt
->thumb_refcount
--;
14455 if (may_become_dynamic_p
)
14457 struct elf_dyn_relocs
**pp
;
14458 struct elf_dyn_relocs
*p
;
14461 pp
= &(eh
->dyn_relocs
);
14464 Elf_Internal_Sym
*isym
;
14466 isym
= bfd_sym_from_r_symndx (&globals
->sym_cache
,
14470 pp
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
14474 for (; (p
= *pp
) != NULL
; pp
= &p
->next
)
14477 /* Everything must go for SEC. */
14487 /* Look through the relocs for a section during the first phase. */
14490 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
14491 asection
*sec
, const Elf_Internal_Rela
*relocs
)
14493 Elf_Internal_Shdr
*symtab_hdr
;
14494 struct elf_link_hash_entry
**sym_hashes
;
14495 const Elf_Internal_Rela
*rel
;
14496 const Elf_Internal_Rela
*rel_end
;
14499 struct elf32_arm_link_hash_table
*htab
;
14500 bfd_boolean call_reloc_p
;
14501 bfd_boolean may_become_dynamic_p
;
14502 bfd_boolean may_need_local_target_p
;
14503 unsigned long nsyms
;
14505 if (bfd_link_relocatable (info
))
14508 BFD_ASSERT (is_arm_elf (abfd
));
14510 htab
= elf32_arm_hash_table (info
);
14516 /* Create dynamic sections for relocatable executables so that we can
14517 copy relocations. */
14518 if (htab
->root
.is_relocatable_executable
14519 && ! htab
->root
.dynamic_sections_created
)
14521 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
14525 if (htab
->root
.dynobj
== NULL
)
14526 htab
->root
.dynobj
= abfd
;
14527 if (!create_ifunc_sections (info
))
14530 dynobj
= htab
->root
.dynobj
;
14532 symtab_hdr
= & elf_symtab_hdr (abfd
);
14533 sym_hashes
= elf_sym_hashes (abfd
);
14534 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
14536 rel_end
= relocs
+ sec
->reloc_count
;
14537 for (rel
= relocs
; rel
< rel_end
; rel
++)
14539 Elf_Internal_Sym
*isym
;
14540 struct elf_link_hash_entry
*h
;
14541 struct elf32_arm_link_hash_entry
*eh
;
14542 unsigned int r_symndx
;
14545 r_symndx
= ELF32_R_SYM (rel
->r_info
);
14546 r_type
= ELF32_R_TYPE (rel
->r_info
);
14547 r_type
= arm_real_reloc_type (htab
, r_type
);
14549 if (r_symndx
>= nsyms
14550 /* PR 9934: It is possible to have relocations that do not
14551 refer to symbols, thus it is also possible to have an
14552 object file containing relocations but no symbol table. */
14553 && (r_symndx
> STN_UNDEF
|| nsyms
> 0))
14555 _bfd_error_handler (_("%B: bad symbol index: %d"), abfd
,
14564 if (r_symndx
< symtab_hdr
->sh_info
)
14566 /* A local symbol. */
14567 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
14574 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
14575 while (h
->root
.type
== bfd_link_hash_indirect
14576 || h
->root
.type
== bfd_link_hash_warning
)
14577 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14579 /* PR15323, ref flags aren't set for references in the
14581 h
->root
.non_ir_ref_regular
= 1;
14585 eh
= (struct elf32_arm_link_hash_entry
*) h
;
14587 call_reloc_p
= FALSE
;
14588 may_become_dynamic_p
= FALSE
;
14589 may_need_local_target_p
= FALSE
;
14591 /* Could be done earlier, if h were already available. */
14592 r_type
= elf32_arm_tls_transition (info
, r_type
, h
);
14596 case R_ARM_GOT_PREL
:
14597 case R_ARM_TLS_GD32
:
14598 case R_ARM_TLS_IE32
:
14599 case R_ARM_TLS_GOTDESC
:
14600 case R_ARM_TLS_DESCSEQ
:
14601 case R_ARM_THM_TLS_DESCSEQ
:
14602 case R_ARM_TLS_CALL
:
14603 case R_ARM_THM_TLS_CALL
:
14604 /* This symbol requires a global offset table entry. */
14606 int tls_type
, old_tls_type
;
14610 case R_ARM_TLS_GD32
: tls_type
= GOT_TLS_GD
; break;
14612 case R_ARM_TLS_IE32
: tls_type
= GOT_TLS_IE
; break;
14614 case R_ARM_TLS_GOTDESC
:
14615 case R_ARM_TLS_CALL
: case R_ARM_THM_TLS_CALL
:
14616 case R_ARM_TLS_DESCSEQ
: case R_ARM_THM_TLS_DESCSEQ
:
14617 tls_type
= GOT_TLS_GDESC
; break;
14619 default: tls_type
= GOT_NORMAL
; break;
14622 if (!bfd_link_executable (info
) && (tls_type
& GOT_TLS_IE
))
14623 info
->flags
|= DF_STATIC_TLS
;
14628 old_tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
14632 /* This is a global offset table entry for a local symbol. */
14633 if (!elf32_arm_allocate_local_sym_info (abfd
))
14635 elf_local_got_refcounts (abfd
)[r_symndx
] += 1;
14636 old_tls_type
= elf32_arm_local_got_tls_type (abfd
) [r_symndx
];
14639 /* If a variable is accessed with both tls methods, two
14640 slots may be created. */
14641 if (GOT_TLS_GD_ANY_P (old_tls_type
)
14642 && GOT_TLS_GD_ANY_P (tls_type
))
14643 tls_type
|= old_tls_type
;
14645 /* We will already have issued an error message if there
14646 is a TLS/non-TLS mismatch, based on the symbol
14647 type. So just combine any TLS types needed. */
14648 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
14649 && tls_type
!= GOT_NORMAL
)
14650 tls_type
|= old_tls_type
;
14652 /* If the symbol is accessed in both IE and GDESC
14653 method, we're able to relax. Turn off the GDESC flag,
14654 without messing up with any other kind of tls types
14655 that may be involved. */
14656 if ((tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_GDESC
))
14657 tls_type
&= ~GOT_TLS_GDESC
;
14659 if (old_tls_type
!= tls_type
)
14662 elf32_arm_hash_entry (h
)->tls_type
= tls_type
;
14664 elf32_arm_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
14667 /* Fall through. */
14669 case R_ARM_TLS_LDM32
:
14670 if (r_type
== R_ARM_TLS_LDM32
)
14671 htab
->tls_ldm_got
.refcount
++;
14672 /* Fall through. */
14674 case R_ARM_GOTOFF32
:
14676 if (htab
->root
.sgot
== NULL
14677 && !create_got_section (htab
->root
.dynobj
, info
))
14686 case R_ARM_THM_CALL
:
14687 case R_ARM_THM_JUMP24
:
14688 case R_ARM_THM_JUMP19
:
14689 call_reloc_p
= TRUE
;
14690 may_need_local_target_p
= TRUE
;
14694 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
14695 ldr __GOTT_INDEX__ offsets. */
14696 if (!htab
->vxworks_p
)
14698 may_need_local_target_p
= TRUE
;
14701 else goto jump_over
;
14703 /* Fall through. */
14705 case R_ARM_MOVW_ABS_NC
:
14706 case R_ARM_MOVT_ABS
:
14707 case R_ARM_THM_MOVW_ABS_NC
:
14708 case R_ARM_THM_MOVT_ABS
:
14709 if (bfd_link_pic (info
))
14712 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
14713 abfd
, elf32_arm_howto_table_1
[r_type
].name
,
14714 (h
) ? h
->root
.root
.string
: "a local symbol");
14715 bfd_set_error (bfd_error_bad_value
);
14719 /* Fall through. */
14721 case R_ARM_ABS32_NOI
:
14723 if (h
!= NULL
&& bfd_link_executable (info
))
14725 h
->pointer_equality_needed
= 1;
14727 /* Fall through. */
14729 case R_ARM_REL32_NOI
:
14730 case R_ARM_MOVW_PREL_NC
:
14731 case R_ARM_MOVT_PREL
:
14732 case R_ARM_THM_MOVW_PREL_NC
:
14733 case R_ARM_THM_MOVT_PREL
:
14735 /* Should the interworking branches be listed here? */
14736 if ((bfd_link_pic (info
) || htab
->root
.is_relocatable_executable
)
14737 && (sec
->flags
& SEC_ALLOC
) != 0)
14740 && elf32_arm_howto_from_type (r_type
)->pc_relative
)
14742 /* In shared libraries and relocatable executables,
14743 we treat local relative references as calls;
14744 see the related SYMBOL_CALLS_LOCAL code in
14745 allocate_dynrelocs. */
14746 call_reloc_p
= TRUE
;
14747 may_need_local_target_p
= TRUE
;
14750 /* We are creating a shared library or relocatable
14751 executable, and this is a reloc against a global symbol,
14752 or a non-PC-relative reloc against a local symbol.
14753 We may need to copy the reloc into the output. */
14754 may_become_dynamic_p
= TRUE
;
14757 may_need_local_target_p
= TRUE
;
14760 /* This relocation describes the C++ object vtable hierarchy.
14761 Reconstruct it for later use during GC. */
14762 case R_ARM_GNU_VTINHERIT
:
14763 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
14767 /* This relocation describes which C++ vtable entries are actually
14768 used. Record for later use during GC. */
14769 case R_ARM_GNU_VTENTRY
:
14770 BFD_ASSERT (h
!= NULL
);
14772 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
14780 /* We may need a .plt entry if the function this reloc
14781 refers to is in a different object, regardless of the
14782 symbol's type. We can't tell for sure yet, because
14783 something later might force the symbol local. */
14785 else if (may_need_local_target_p
)
14786 /* If this reloc is in a read-only section, we might
14787 need a copy reloc. We can't check reliably at this
14788 stage whether the section is read-only, as input
14789 sections have not yet been mapped to output sections.
14790 Tentatively set the flag for now, and correct in
14791 adjust_dynamic_symbol. */
14792 h
->non_got_ref
= 1;
14795 if (may_need_local_target_p
14796 && (h
!= NULL
|| ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
))
14798 union gotplt_union
*root_plt
;
14799 struct arm_plt_info
*arm_plt
;
14800 struct arm_local_iplt_info
*local_iplt
;
14804 root_plt
= &h
->plt
;
14805 arm_plt
= &eh
->plt
;
14809 local_iplt
= elf32_arm_create_local_iplt (abfd
, r_symndx
);
14810 if (local_iplt
== NULL
)
14812 root_plt
= &local_iplt
->root
;
14813 arm_plt
= &local_iplt
->arm
;
14816 /* If the symbol is a function that doesn't bind locally,
14817 this relocation will need a PLT entry. */
14818 if (root_plt
->refcount
!= -1)
14819 root_plt
->refcount
+= 1;
14822 arm_plt
->noncall_refcount
++;
14824 /* It's too early to use htab->use_blx here, so we have to
14825 record possible blx references separately from
14826 relocs that definitely need a thumb stub. */
14828 if (r_type
== R_ARM_THM_CALL
)
14829 arm_plt
->maybe_thumb_refcount
+= 1;
14831 if (r_type
== R_ARM_THM_JUMP24
14832 || r_type
== R_ARM_THM_JUMP19
)
14833 arm_plt
->thumb_refcount
+= 1;
14836 if (may_become_dynamic_p
)
14838 struct elf_dyn_relocs
*p
, **head
;
14840 /* Create a reloc section in dynobj. */
14841 if (sreloc
== NULL
)
14843 sreloc
= _bfd_elf_make_dynamic_reloc_section
14844 (sec
, dynobj
, 2, abfd
, ! htab
->use_rel
);
14846 if (sreloc
== NULL
)
14849 /* BPABI objects never have dynamic relocations mapped. */
14850 if (htab
->symbian_p
)
14854 flags
= bfd_get_section_flags (dynobj
, sreloc
);
14855 flags
&= ~(SEC_LOAD
| SEC_ALLOC
);
14856 bfd_set_section_flags (dynobj
, sreloc
, flags
);
14860 /* If this is a global symbol, count the number of
14861 relocations we need for this symbol. */
14863 head
= &((struct elf32_arm_link_hash_entry
*) h
)->dyn_relocs
;
14866 head
= elf32_arm_get_local_dynreloc_list (abfd
, r_symndx
, isym
);
14872 if (p
== NULL
|| p
->sec
!= sec
)
14874 bfd_size_type amt
= sizeof *p
;
14876 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->root
.dynobj
, amt
);
14886 if (elf32_arm_howto_from_type (r_type
)->pc_relative
)
14896 elf32_arm_update_relocs (asection
*o
,
14897 struct bfd_elf_section_reloc_data
*reldata
)
14899 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
14900 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
14901 const struct elf_backend_data
*bed
;
14902 _arm_elf_section_data
*eado
;
14903 struct bfd_link_order
*p
;
14904 bfd_byte
*erela_head
, *erela
;
14905 Elf_Internal_Rela
*irela_head
, *irela
;
14906 Elf_Internal_Shdr
*rel_hdr
;
14908 unsigned int count
;
14910 eado
= get_arm_elf_section_data (o
);
14912 if (!eado
|| eado
->elf
.this_hdr
.sh_type
!= SHT_ARM_EXIDX
)
14916 bed
= get_elf_backend_data (abfd
);
14917 rel_hdr
= reldata
->hdr
;
14919 if (rel_hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
14921 swap_in
= bed
->s
->swap_reloc_in
;
14922 swap_out
= bed
->s
->swap_reloc_out
;
14924 else if (rel_hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
14926 swap_in
= bed
->s
->swap_reloca_in
;
14927 swap_out
= bed
->s
->swap_reloca_out
;
14932 erela_head
= rel_hdr
->contents
;
14933 irela_head
= (Elf_Internal_Rela
*) bfd_zmalloc
14934 ((NUM_SHDR_ENTRIES (rel_hdr
) + 1) * sizeof (*irela_head
));
14936 erela
= erela_head
;
14937 irela
= irela_head
;
14940 for (p
= o
->map_head
.link_order
; p
; p
= p
->next
)
14942 if (p
->type
== bfd_section_reloc_link_order
14943 || p
->type
== bfd_symbol_reloc_link_order
)
14945 (*swap_in
) (abfd
, erela
, irela
);
14946 erela
+= rel_hdr
->sh_entsize
;
14950 else if (p
->type
== bfd_indirect_link_order
)
14952 struct bfd_elf_section_reloc_data
*input_reldata
;
14953 arm_unwind_table_edit
*edit_list
, *edit_tail
;
14954 _arm_elf_section_data
*eadi
;
14959 i
= p
->u
.indirect
.section
;
14961 eadi
= get_arm_elf_section_data (i
);
14962 edit_list
= eadi
->u
.exidx
.unwind_edit_list
;
14963 edit_tail
= eadi
->u
.exidx
.unwind_edit_tail
;
14964 offset
= o
->vma
+ i
->output_offset
;
14966 if (eadi
->elf
.rel
.hdr
&&
14967 eadi
->elf
.rel
.hdr
->sh_entsize
== rel_hdr
->sh_entsize
)
14968 input_reldata
= &eadi
->elf
.rel
;
14969 else if (eadi
->elf
.rela
.hdr
&&
14970 eadi
->elf
.rela
.hdr
->sh_entsize
== rel_hdr
->sh_entsize
)
14971 input_reldata
= &eadi
->elf
.rela
;
14977 for (j
= 0; j
< NUM_SHDR_ENTRIES (input_reldata
->hdr
); j
++)
14979 arm_unwind_table_edit
*edit_node
, *edit_next
;
14981 bfd_vma reloc_index
;
14983 (*swap_in
) (abfd
, erela
, irela
);
14984 reloc_index
= (irela
->r_offset
- offset
) / 8;
14987 edit_node
= edit_list
;
14988 for (edit_next
= edit_list
;
14989 edit_next
&& edit_next
->index
<= reloc_index
;
14990 edit_next
= edit_node
->next
)
14993 edit_node
= edit_next
;
14996 if (edit_node
->type
!= DELETE_EXIDX_ENTRY
14997 || edit_node
->index
!= reloc_index
)
14999 irela
->r_offset
-= bias
* 8;
15004 erela
+= rel_hdr
->sh_entsize
;
15007 if (edit_tail
->type
== INSERT_EXIDX_CANTUNWIND_AT_END
)
15009 /* New relocation entity. */
15010 asection
*text_sec
= edit_tail
->linked_section
;
15011 asection
*text_out
= text_sec
->output_section
;
15012 bfd_vma exidx_offset
= offset
+ i
->size
- 8;
15014 irela
->r_addend
= 0;
15015 irela
->r_offset
= exidx_offset
;
15016 irela
->r_info
= ELF32_R_INFO
15017 (text_out
->target_index
, R_ARM_PREL31
);
15024 for (j
= 0; j
< NUM_SHDR_ENTRIES (input_reldata
->hdr
); j
++)
15026 (*swap_in
) (abfd
, erela
, irela
);
15027 erela
+= rel_hdr
->sh_entsize
;
15031 count
+= NUM_SHDR_ENTRIES (input_reldata
->hdr
);
15036 reldata
->count
= count
;
15037 rel_hdr
->sh_size
= count
* rel_hdr
->sh_entsize
;
15039 erela
= erela_head
;
15040 irela
= irela_head
;
15043 (*swap_out
) (abfd
, irela
, erela
);
15044 erela
+= rel_hdr
->sh_entsize
;
15051 /* Hashes are no longer valid. */
15052 free (reldata
->hashes
);
15053 reldata
->hashes
= NULL
;
15056 /* Unwinding tables are not referenced directly. This pass marks them as
15057 required if the corresponding code section is marked. Similarly, ARMv8-M
15058 secure entry functions can only be referenced by SG veneers which are
15059 created after the GC process. They need to be marked in case they reside in
15060 their own section (as would be the case if code was compiled with
15061 -ffunction-sections). */
15064 elf32_arm_gc_mark_extra_sections (struct bfd_link_info
*info
,
15065 elf_gc_mark_hook_fn gc_mark_hook
)
15068 Elf_Internal_Shdr
**elf_shdrp
;
15069 asection
*cmse_sec
;
15070 obj_attribute
*out_attr
;
15071 Elf_Internal_Shdr
*symtab_hdr
;
15072 unsigned i
, sym_count
, ext_start
;
15073 const struct elf_backend_data
*bed
;
15074 struct elf_link_hash_entry
**sym_hashes
;
15075 struct elf32_arm_link_hash_entry
*cmse_hash
;
15076 bfd_boolean again
, is_v8m
, first_bfd_browse
= TRUE
;
15078 _bfd_elf_gc_mark_extra_sections (info
, gc_mark_hook
);
15080 out_attr
= elf_known_obj_attributes_proc (info
->output_bfd
);
15081 is_v8m
= out_attr
[Tag_CPU_arch
].i
>= TAG_CPU_ARCH_V8M_BASE
15082 && out_attr
[Tag_CPU_arch_profile
].i
== 'M';
15084 /* Marking EH data may cause additional code sections to be marked,
15085 requiring multiple passes. */
15090 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
15094 if (! is_arm_elf (sub
))
15097 elf_shdrp
= elf_elfsections (sub
);
15098 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
15100 Elf_Internal_Shdr
*hdr
;
15102 hdr
= &elf_section_data (o
)->this_hdr
;
15103 if (hdr
->sh_type
== SHT_ARM_EXIDX
15105 && hdr
->sh_link
< elf_numsections (sub
)
15107 && elf_shdrp
[hdr
->sh_link
]->bfd_section
->gc_mark
)
15110 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
15115 /* Mark section holding ARMv8-M secure entry functions. We mark all
15116 of them so no need for a second browsing. */
15117 if (is_v8m
&& first_bfd_browse
)
15119 sym_hashes
= elf_sym_hashes (sub
);
15120 bed
= get_elf_backend_data (sub
);
15121 symtab_hdr
= &elf_tdata (sub
)->symtab_hdr
;
15122 sym_count
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
15123 ext_start
= symtab_hdr
->sh_info
;
15125 /* Scan symbols. */
15126 for (i
= ext_start
; i
< sym_count
; i
++)
15128 cmse_hash
= elf32_arm_hash_entry (sym_hashes
[i
- ext_start
]);
15130 /* Assume it is a special symbol. If not, cmse_scan will
15131 warn about it and user can do something about it. */
15132 if (ARM_GET_SYM_CMSE_SPCL (cmse_hash
->root
.target_internal
))
15134 cmse_sec
= cmse_hash
->root
.root
.u
.def
.section
;
15135 if (!cmse_sec
->gc_mark
15136 && !_bfd_elf_gc_mark (info
, cmse_sec
, gc_mark_hook
))
15142 first_bfd_browse
= FALSE
;
15148 /* Treat mapping symbols as special target symbols. */
15151 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
15153 return bfd_is_arm_special_symbol_name (sym
->name
,
15154 BFD_ARM_SPECIAL_SYM_TYPE_ANY
);
15157 /* This is a copy of elf_find_function() from elf.c except that
15158 ARM mapping symbols are ignored when looking for function names
15159 and STT_ARM_TFUNC is considered to a function type. */
15162 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
15163 asymbol
** symbols
,
15164 asection
* section
,
15166 const char ** filename_ptr
,
15167 const char ** functionname_ptr
)
15169 const char * filename
= NULL
;
15170 asymbol
* func
= NULL
;
15171 bfd_vma low_func
= 0;
15174 for (p
= symbols
; *p
!= NULL
; p
++)
15176 elf_symbol_type
*q
;
15178 q
= (elf_symbol_type
*) *p
;
15180 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
15185 filename
= bfd_asymbol_name (&q
->symbol
);
15188 case STT_ARM_TFUNC
:
15190 /* Skip mapping symbols. */
15191 if ((q
->symbol
.flags
& BSF_LOCAL
)
15192 && bfd_is_arm_special_symbol_name (q
->symbol
.name
,
15193 BFD_ARM_SPECIAL_SYM_TYPE_ANY
))
15195 /* Fall through. */
15196 if (bfd_get_section (&q
->symbol
) == section
15197 && q
->symbol
.value
>= low_func
15198 && q
->symbol
.value
<= offset
)
15200 func
= (asymbol
*) q
;
15201 low_func
= q
->symbol
.value
;
15211 *filename_ptr
= filename
;
15212 if (functionname_ptr
)
15213 *functionname_ptr
= bfd_asymbol_name (func
);
15219 /* Find the nearest line to a particular section and offset, for error
15220 reporting. This code is a duplicate of the code in elf.c, except
15221 that it uses arm_elf_find_function. */
15224 elf32_arm_find_nearest_line (bfd
* abfd
,
15225 asymbol
** symbols
,
15226 asection
* section
,
15228 const char ** filename_ptr
,
15229 const char ** functionname_ptr
,
15230 unsigned int * line_ptr
,
15231 unsigned int * discriminator_ptr
)
15233 bfd_boolean found
= FALSE
;
15235 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
15236 filename_ptr
, functionname_ptr
,
15237 line_ptr
, discriminator_ptr
,
15238 dwarf_debug_sections
, 0,
15239 & elf_tdata (abfd
)->dwarf2_find_line_info
))
15241 if (!*functionname_ptr
)
15242 arm_elf_find_function (abfd
, symbols
, section
, offset
,
15243 *filename_ptr
? NULL
: filename_ptr
,
15249 /* Skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain
15252 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
15253 & found
, filename_ptr
,
15254 functionname_ptr
, line_ptr
,
15255 & elf_tdata (abfd
)->line_info
))
15258 if (found
&& (*functionname_ptr
|| *line_ptr
))
15261 if (symbols
== NULL
)
15264 if (! arm_elf_find_function (abfd
, symbols
, section
, offset
,
15265 filename_ptr
, functionname_ptr
))
15273 elf32_arm_find_inliner_info (bfd
* abfd
,
15274 const char ** filename_ptr
,
15275 const char ** functionname_ptr
,
15276 unsigned int * line_ptr
)
15279 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
15280 functionname_ptr
, line_ptr
,
15281 & elf_tdata (abfd
)->dwarf2_find_line_info
);
15285 /* Adjust a symbol defined by a dynamic object and referenced by a
15286 regular object. The current definition is in some section of the
15287 dynamic object, but we're not including those sections. We have to
15288 change the definition to something the rest of the link can
15292 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
15293 struct elf_link_hash_entry
* h
)
15296 asection
*s
, *srel
;
15297 struct elf32_arm_link_hash_entry
* eh
;
15298 struct elf32_arm_link_hash_table
*globals
;
15300 globals
= elf32_arm_hash_table (info
);
15301 if (globals
== NULL
)
15304 dynobj
= elf_hash_table (info
)->dynobj
;
15306 /* Make sure we know what is going on here. */
15307 BFD_ASSERT (dynobj
!= NULL
15309 || h
->type
== STT_GNU_IFUNC
15310 || h
->u
.weakdef
!= NULL
15313 && !h
->def_regular
)));
15315 eh
= (struct elf32_arm_link_hash_entry
*) h
;
15317 /* If this is a function, put it in the procedure linkage table. We
15318 will fill in the contents of the procedure linkage table later,
15319 when we know the address of the .got section. */
15320 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
15322 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
15323 symbol binds locally. */
15324 if (h
->plt
.refcount
<= 0
15325 || (h
->type
!= STT_GNU_IFUNC
15326 && (SYMBOL_CALLS_LOCAL (info
, h
)
15327 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
15328 && h
->root
.type
== bfd_link_hash_undefweak
))))
15330 /* This case can occur if we saw a PLT32 reloc in an input
15331 file, but the symbol was never referred to by a dynamic
15332 object, or if all references were garbage collected. In
15333 such a case, we don't actually need to build a procedure
15334 linkage table, and we can just do a PC24 reloc instead. */
15335 h
->plt
.offset
= (bfd_vma
) -1;
15336 eh
->plt
.thumb_refcount
= 0;
15337 eh
->plt
.maybe_thumb_refcount
= 0;
15338 eh
->plt
.noncall_refcount
= 0;
15346 /* It's possible that we incorrectly decided a .plt reloc was
15347 needed for an R_ARM_PC24 or similar reloc to a non-function sym
15348 in check_relocs. We can't decide accurately between function
15349 and non-function syms in check-relocs; Objects loaded later in
15350 the link may change h->type. So fix it now. */
15351 h
->plt
.offset
= (bfd_vma
) -1;
15352 eh
->plt
.thumb_refcount
= 0;
15353 eh
->plt
.maybe_thumb_refcount
= 0;
15354 eh
->plt
.noncall_refcount
= 0;
15357 /* If this is a weak symbol, and there is a real definition, the
15358 processor independent code will have arranged for us to see the
15359 real definition first, and we can just use the same value. */
15360 if (h
->u
.weakdef
!= NULL
)
15362 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
15363 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
15364 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
15365 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
15369 /* If there are no non-GOT references, we do not need a copy
15371 if (!h
->non_got_ref
)
15374 /* This is a reference to a symbol defined by a dynamic object which
15375 is not a function. */
15377 /* If we are creating a shared library, we must presume that the
15378 only references to the symbol are via the global offset table.
15379 For such cases we need not do anything here; the relocations will
15380 be handled correctly by relocate_section. Relocatable executables
15381 can reference data in shared objects directly, so we don't need to
15382 do anything here. */
15383 if (bfd_link_pic (info
) || globals
->root
.is_relocatable_executable
)
15386 /* We must allocate the symbol in our .dynbss section, which will
15387 become part of the .bss section of the executable. There will be
15388 an entry for this symbol in the .dynsym section. The dynamic
15389 object will contain position independent code, so all references
15390 from the dynamic object to this symbol will go through the global
15391 offset table. The dynamic linker will use the .dynsym entry to
15392 determine the address it must put in the global offset table, so
15393 both the dynamic object and the regular object will refer to the
15394 same memory location for the variable. */
15395 /* If allowed, we must generate a R_ARM_COPY reloc to tell the dynamic
15396 linker to copy the initial value out of the dynamic object and into
15397 the runtime process image. We need to remember the offset into the
15398 .rel(a).bss section we are going to use. */
15399 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
15401 s
= globals
->root
.sdynrelro
;
15402 srel
= globals
->root
.sreldynrelro
;
15406 s
= globals
->root
.sdynbss
;
15407 srel
= globals
->root
.srelbss
;
15409 if (info
->nocopyreloc
== 0
15410 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
15413 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
15417 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
15420 /* Allocate space in .plt, .got and associated reloc sections for
15424 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry
*h
, void * inf
)
15426 struct bfd_link_info
*info
;
15427 struct elf32_arm_link_hash_table
*htab
;
15428 struct elf32_arm_link_hash_entry
*eh
;
15429 struct elf_dyn_relocs
*p
;
15431 if (h
->root
.type
== bfd_link_hash_indirect
)
15434 eh
= (struct elf32_arm_link_hash_entry
*) h
;
15436 info
= (struct bfd_link_info
*) inf
;
15437 htab
= elf32_arm_hash_table (info
);
15441 if ((htab
->root
.dynamic_sections_created
|| h
->type
== STT_GNU_IFUNC
)
15442 && h
->plt
.refcount
> 0)
15444 /* Make sure this symbol is output as a dynamic symbol.
15445 Undefined weak syms won't yet be marked as dynamic. */
15446 if (h
->dynindx
== -1
15447 && !h
->forced_local
)
15449 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
15453 /* If the call in the PLT entry binds locally, the associated
15454 GOT entry should use an R_ARM_IRELATIVE relocation instead of
15455 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
15456 than the .plt section. */
15457 if (h
->type
== STT_GNU_IFUNC
&& SYMBOL_CALLS_LOCAL (info
, h
))
15460 if (eh
->plt
.noncall_refcount
== 0
15461 && SYMBOL_REFERENCES_LOCAL (info
, h
))
15462 /* All non-call references can be resolved directly.
15463 This means that they can (and in some cases, must)
15464 resolve directly to the run-time target, rather than
15465 to the PLT. That in turns means that any .got entry
15466 would be equal to the .igot.plt entry, so there's
15467 no point having both. */
15468 h
->got
.refcount
= 0;
15471 if (bfd_link_pic (info
)
15473 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
15475 elf32_arm_allocate_plt_entry (info
, eh
->is_iplt
, &h
->plt
, &eh
->plt
);
15477 /* If this symbol is not defined in a regular file, and we are
15478 not generating a shared library, then set the symbol to this
15479 location in the .plt. This is required to make function
15480 pointers compare as equal between the normal executable and
15481 the shared library. */
15482 if (! bfd_link_pic (info
)
15483 && !h
->def_regular
)
15485 h
->root
.u
.def
.section
= htab
->root
.splt
;
15486 h
->root
.u
.def
.value
= h
->plt
.offset
;
15488 /* Make sure the function is not marked as Thumb, in case
15489 it is the target of an ABS32 relocation, which will
15490 point to the PLT entry. */
15491 ARM_SET_SYM_BRANCH_TYPE (h
->target_internal
, ST_BRANCH_TO_ARM
);
15494 /* VxWorks executables have a second set of relocations for
15495 each PLT entry. They go in a separate relocation section,
15496 which is processed by the kernel loader. */
15497 if (htab
->vxworks_p
&& !bfd_link_pic (info
))
15499 /* There is a relocation for the initial PLT entry:
15500 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
15501 if (h
->plt
.offset
== htab
->plt_header_size
)
15502 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 1);
15504 /* There are two extra relocations for each subsequent
15505 PLT entry: an R_ARM_32 relocation for the GOT entry,
15506 and an R_ARM_32 relocation for the PLT entry. */
15507 elf32_arm_allocate_dynrelocs (info
, htab
->srelplt2
, 2);
15512 h
->plt
.offset
= (bfd_vma
) -1;
15518 h
->plt
.offset
= (bfd_vma
) -1;
15522 eh
= (struct elf32_arm_link_hash_entry
*) h
;
15523 eh
->tlsdesc_got
= (bfd_vma
) -1;
15525 if (h
->got
.refcount
> 0)
15529 int tls_type
= elf32_arm_hash_entry (h
)->tls_type
;
15532 /* Make sure this symbol is output as a dynamic symbol.
15533 Undefined weak syms won't yet be marked as dynamic. */
15534 if (h
->dynindx
== -1
15535 && !h
->forced_local
)
15537 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
15541 if (!htab
->symbian_p
)
15543 s
= htab
->root
.sgot
;
15544 h
->got
.offset
= s
->size
;
15546 if (tls_type
== GOT_UNKNOWN
)
15549 if (tls_type
== GOT_NORMAL
)
15550 /* Non-TLS symbols need one GOT slot. */
15554 if (tls_type
& GOT_TLS_GDESC
)
15556 /* R_ARM_TLS_DESC needs 2 GOT slots. */
15558 = (htab
->root
.sgotplt
->size
15559 - elf32_arm_compute_jump_table_size (htab
));
15560 htab
->root
.sgotplt
->size
+= 8;
15561 h
->got
.offset
= (bfd_vma
) -2;
15562 /* plt.got_offset needs to know there's a TLS_DESC
15563 reloc in the middle of .got.plt. */
15564 htab
->num_tls_desc
++;
15567 if (tls_type
& GOT_TLS_GD
)
15569 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
15570 the symbol is both GD and GDESC, got.offset may
15571 have been overwritten. */
15572 h
->got
.offset
= s
->size
;
15576 if (tls_type
& GOT_TLS_IE
)
15577 /* R_ARM_TLS_IE32 needs one GOT slot. */
15581 dyn
= htab
->root
.dynamic_sections_created
;
15584 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
15585 bfd_link_pic (info
),
15587 && (!bfd_link_pic (info
)
15588 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
15591 if (tls_type
!= GOT_NORMAL
15592 && (bfd_link_pic (info
) || indx
!= 0)
15593 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
15594 || h
->root
.type
!= bfd_link_hash_undefweak
))
15596 if (tls_type
& GOT_TLS_IE
)
15597 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
15599 if (tls_type
& GOT_TLS_GD
)
15600 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
15602 if (tls_type
& GOT_TLS_GDESC
)
15604 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelplt
, 1);
15605 /* GDESC needs a trampoline to jump to. */
15606 htab
->tls_trampoline
= -1;
15609 /* Only GD needs it. GDESC just emits one relocation per
15611 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
15612 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
15614 else if (indx
!= -1 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
15616 if (htab
->root
.dynamic_sections_created
)
15617 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
15618 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
15620 else if (h
->type
== STT_GNU_IFUNC
15621 && eh
->plt
.noncall_refcount
== 0)
15622 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
15623 they all resolve dynamically instead. Reserve room for the
15624 GOT entry's R_ARM_IRELATIVE relocation. */
15625 elf32_arm_allocate_irelocs (info
, htab
->root
.srelgot
, 1);
15626 else if (bfd_link_pic (info
)
15627 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
15628 || h
->root
.type
!= bfd_link_hash_undefweak
))
15629 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
15630 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
15634 h
->got
.offset
= (bfd_vma
) -1;
15636 /* Allocate stubs for exported Thumb functions on v4t. */
15637 if (!htab
->use_blx
&& h
->dynindx
!= -1
15639 && ARM_GET_SYM_BRANCH_TYPE (h
->target_internal
) == ST_BRANCH_TO_THUMB
15640 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
15642 struct elf_link_hash_entry
* th
;
15643 struct bfd_link_hash_entry
* bh
;
15644 struct elf_link_hash_entry
* myh
;
15648 /* Create a new symbol to regist the real location of the function. */
15649 s
= h
->root
.u
.def
.section
;
15650 sprintf (name
, "__real_%s", h
->root
.root
.string
);
15651 _bfd_generic_link_add_one_symbol (info
, s
->owner
,
15652 name
, BSF_GLOBAL
, s
,
15653 h
->root
.u
.def
.value
,
15654 NULL
, TRUE
, FALSE
, &bh
);
15656 myh
= (struct elf_link_hash_entry
*) bh
;
15657 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
15658 myh
->forced_local
= 1;
15659 ARM_SET_SYM_BRANCH_TYPE (myh
->target_internal
, ST_BRANCH_TO_THUMB
);
15660 eh
->export_glue
= myh
;
15661 th
= record_arm_to_thumb_glue (info
, h
);
15662 /* Point the symbol at the stub. */
15663 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
15664 ARM_SET_SYM_BRANCH_TYPE (h
->target_internal
, ST_BRANCH_TO_ARM
);
15665 h
->root
.u
.def
.section
= th
->root
.u
.def
.section
;
15666 h
->root
.u
.def
.value
= th
->root
.u
.def
.value
& ~1;
15669 if (eh
->dyn_relocs
== NULL
)
15672 /* In the shared -Bsymbolic case, discard space allocated for
15673 dynamic pc-relative relocs against symbols which turn out to be
15674 defined in regular objects. For the normal shared case, discard
15675 space for pc-relative relocs that have become local due to symbol
15676 visibility changes. */
15678 if (bfd_link_pic (info
) || htab
->root
.is_relocatable_executable
)
15680 /* Relocs that use pc_count are PC-relative forms, which will appear
15681 on something like ".long foo - ." or "movw REG, foo - .". We want
15682 calls to protected symbols to resolve directly to the function
15683 rather than going via the plt. If people want function pointer
15684 comparisons to work as expected then they should avoid writing
15685 assembly like ".long foo - .". */
15686 if (SYMBOL_CALLS_LOCAL (info
, h
))
15688 struct elf_dyn_relocs
**pp
;
15690 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
15692 p
->count
-= p
->pc_count
;
15701 if (htab
->vxworks_p
)
15703 struct elf_dyn_relocs
**pp
;
15705 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
15707 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
15714 /* Also discard relocs on undefined weak syms with non-default
15716 if (eh
->dyn_relocs
!= NULL
15717 && h
->root
.type
== bfd_link_hash_undefweak
)
15719 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
15720 eh
->dyn_relocs
= NULL
;
15722 /* Make sure undefined weak symbols are output as a dynamic
15724 else if (h
->dynindx
== -1
15725 && !h
->forced_local
)
15727 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
15732 else if (htab
->root
.is_relocatable_executable
&& h
->dynindx
== -1
15733 && h
->root
.type
== bfd_link_hash_new
)
15735 /* Output absolute symbols so that we can create relocations
15736 against them. For normal symbols we output a relocation
15737 against the section that contains them. */
15738 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
15745 /* For the non-shared case, discard space for relocs against
15746 symbols which turn out to need copy relocs or are not
15749 if (!h
->non_got_ref
15750 && ((h
->def_dynamic
15751 && !h
->def_regular
)
15752 || (htab
->root
.dynamic_sections_created
15753 && (h
->root
.type
== bfd_link_hash_undefweak
15754 || h
->root
.type
== bfd_link_hash_undefined
))))
15756 /* Make sure this symbol is output as a dynamic symbol.
15757 Undefined weak syms won't yet be marked as dynamic. */
15758 if (h
->dynindx
== -1
15759 && !h
->forced_local
)
15761 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
15765 /* If that succeeded, we know we'll be keeping all the
15767 if (h
->dynindx
!= -1)
15771 eh
->dyn_relocs
= NULL
;
15776 /* Finally, allocate space. */
15777 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
15779 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
15780 if (h
->type
== STT_GNU_IFUNC
15781 && eh
->plt
.noncall_refcount
== 0
15782 && SYMBOL_REFERENCES_LOCAL (info
, h
))
15783 elf32_arm_allocate_irelocs (info
, sreloc
, p
->count
);
15785 elf32_arm_allocate_dynrelocs (info
, sreloc
, p
->count
);
15791 /* Find any dynamic relocs that apply to read-only sections. */
15794 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
* h
, void * inf
)
15796 struct elf32_arm_link_hash_entry
* eh
;
15797 struct elf_dyn_relocs
* p
;
15799 eh
= (struct elf32_arm_link_hash_entry
*) h
;
15800 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
15802 asection
*s
= p
->sec
;
15804 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
15806 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
15808 info
->flags
|= DF_TEXTREL
;
15810 /* Not an error, just cut short the traversal. */
15818 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info
*info
,
15821 struct elf32_arm_link_hash_table
*globals
;
15823 globals
= elf32_arm_hash_table (info
);
15824 if (globals
== NULL
)
15827 globals
->byteswap_code
= byteswap_code
;
15830 /* Set the sizes of the dynamic sections. */
15833 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
15834 struct bfd_link_info
* info
)
15839 bfd_boolean relocs
;
15841 struct elf32_arm_link_hash_table
*htab
;
15843 htab
= elf32_arm_hash_table (info
);
15847 dynobj
= elf_hash_table (info
)->dynobj
;
15848 BFD_ASSERT (dynobj
!= NULL
);
15849 check_use_blx (htab
);
15851 if (elf_hash_table (info
)->dynamic_sections_created
)
15853 /* Set the contents of the .interp section to the interpreter. */
15854 if (bfd_link_executable (info
) && !info
->nointerp
)
15856 s
= bfd_get_linker_section (dynobj
, ".interp");
15857 BFD_ASSERT (s
!= NULL
);
15858 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
15859 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
15863 /* Set up .got offsets for local syms, and space for local dynamic
15865 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
15867 bfd_signed_vma
*local_got
;
15868 bfd_signed_vma
*end_local_got
;
15869 struct arm_local_iplt_info
**local_iplt_ptr
, *local_iplt
;
15870 char *local_tls_type
;
15871 bfd_vma
*local_tlsdesc_gotent
;
15872 bfd_size_type locsymcount
;
15873 Elf_Internal_Shdr
*symtab_hdr
;
15875 bfd_boolean is_vxworks
= htab
->vxworks_p
;
15876 unsigned int symndx
;
15878 if (! is_arm_elf (ibfd
))
15881 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
15883 struct elf_dyn_relocs
*p
;
15885 for (p
= (struct elf_dyn_relocs
*)
15886 elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
15888 if (!bfd_is_abs_section (p
->sec
)
15889 && bfd_is_abs_section (p
->sec
->output_section
))
15891 /* Input section has been discarded, either because
15892 it is a copy of a linkonce section or due to
15893 linker script /DISCARD/, so we'll be discarding
15896 else if (is_vxworks
15897 && strcmp (p
->sec
->output_section
->name
,
15900 /* Relocations in vxworks .tls_vars sections are
15901 handled specially by the loader. */
15903 else if (p
->count
!= 0)
15905 srel
= elf_section_data (p
->sec
)->sreloc
;
15906 elf32_arm_allocate_dynrelocs (info
, srel
, p
->count
);
15907 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
15908 info
->flags
|= DF_TEXTREL
;
15913 local_got
= elf_local_got_refcounts (ibfd
);
15917 symtab_hdr
= & elf_symtab_hdr (ibfd
);
15918 locsymcount
= symtab_hdr
->sh_info
;
15919 end_local_got
= local_got
+ locsymcount
;
15920 local_iplt_ptr
= elf32_arm_local_iplt (ibfd
);
15921 local_tls_type
= elf32_arm_local_got_tls_type (ibfd
);
15922 local_tlsdesc_gotent
= elf32_arm_local_tlsdesc_gotent (ibfd
);
15924 s
= htab
->root
.sgot
;
15925 srel
= htab
->root
.srelgot
;
15926 for (; local_got
< end_local_got
;
15927 ++local_got
, ++local_iplt_ptr
, ++local_tls_type
,
15928 ++local_tlsdesc_gotent
, ++symndx
)
15930 *local_tlsdesc_gotent
= (bfd_vma
) -1;
15931 local_iplt
= *local_iplt_ptr
;
15932 if (local_iplt
!= NULL
)
15934 struct elf_dyn_relocs
*p
;
15936 if (local_iplt
->root
.refcount
> 0)
15938 elf32_arm_allocate_plt_entry (info
, TRUE
,
15941 if (local_iplt
->arm
.noncall_refcount
== 0)
15942 /* All references to the PLT are calls, so all
15943 non-call references can resolve directly to the
15944 run-time target. This means that the .got entry
15945 would be the same as the .igot.plt entry, so there's
15946 no point creating both. */
15951 BFD_ASSERT (local_iplt
->arm
.noncall_refcount
== 0);
15952 local_iplt
->root
.offset
= (bfd_vma
) -1;
15955 for (p
= local_iplt
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
15959 psrel
= elf_section_data (p
->sec
)->sreloc
;
15960 if (local_iplt
->arm
.noncall_refcount
== 0)
15961 elf32_arm_allocate_irelocs (info
, psrel
, p
->count
);
15963 elf32_arm_allocate_dynrelocs (info
, psrel
, p
->count
);
15966 if (*local_got
> 0)
15968 Elf_Internal_Sym
*isym
;
15970 *local_got
= s
->size
;
15971 if (*local_tls_type
& GOT_TLS_GD
)
15972 /* TLS_GD relocs need an 8-byte structure in the GOT. */
15974 if (*local_tls_type
& GOT_TLS_GDESC
)
15976 *local_tlsdesc_gotent
= htab
->root
.sgotplt
->size
15977 - elf32_arm_compute_jump_table_size (htab
);
15978 htab
->root
.sgotplt
->size
+= 8;
15979 *local_got
= (bfd_vma
) -2;
15980 /* plt.got_offset needs to know there's a TLS_DESC
15981 reloc in the middle of .got.plt. */
15982 htab
->num_tls_desc
++;
15984 if (*local_tls_type
& GOT_TLS_IE
)
15987 if (*local_tls_type
& GOT_NORMAL
)
15989 /* If the symbol is both GD and GDESC, *local_got
15990 may have been overwritten. */
15991 *local_got
= s
->size
;
15995 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, symndx
);
15999 /* If all references to an STT_GNU_IFUNC PLT are calls,
16000 then all non-call references, including this GOT entry,
16001 resolve directly to the run-time target. */
16002 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
16003 && (local_iplt
== NULL
16004 || local_iplt
->arm
.noncall_refcount
== 0))
16005 elf32_arm_allocate_irelocs (info
, srel
, 1);
16006 else if (bfd_link_pic (info
) || output_bfd
->flags
& DYNAMIC
)
16008 if ((bfd_link_pic (info
) && !(*local_tls_type
& GOT_TLS_GDESC
))
16009 || *local_tls_type
& GOT_TLS_GD
)
16010 elf32_arm_allocate_dynrelocs (info
, srel
, 1);
16012 if (bfd_link_pic (info
) && *local_tls_type
& GOT_TLS_GDESC
)
16014 elf32_arm_allocate_dynrelocs (info
,
16015 htab
->root
.srelplt
, 1);
16016 htab
->tls_trampoline
= -1;
16021 *local_got
= (bfd_vma
) -1;
16025 if (htab
->tls_ldm_got
.refcount
> 0)
16027 /* Allocate two GOT entries and one dynamic relocation (if necessary)
16028 for R_ARM_TLS_LDM32 relocations. */
16029 htab
->tls_ldm_got
.offset
= htab
->root
.sgot
->size
;
16030 htab
->root
.sgot
->size
+= 8;
16031 if (bfd_link_pic (info
))
16032 elf32_arm_allocate_dynrelocs (info
, htab
->root
.srelgot
, 1);
16035 htab
->tls_ldm_got
.offset
= -1;
16037 /* Allocate global sym .plt and .got entries, and space for global
16038 sym dynamic relocs. */
16039 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs_for_symbol
, info
);
16041 /* Here we rummage through the found bfds to collect glue information. */
16042 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
16044 if (! is_arm_elf (ibfd
))
16047 /* Initialise mapping tables for code/data. */
16048 bfd_elf32_arm_init_maps (ibfd
);
16050 if (!bfd_elf32_arm_process_before_allocation (ibfd
, info
)
16051 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd
, info
)
16052 || !bfd_elf32_arm_stm32l4xx_erratum_scan (ibfd
, info
))
16053 _bfd_error_handler (_("Errors encountered processing file %B"), ibfd
);
16056 /* Allocate space for the glue sections now that we've sized them. */
16057 bfd_elf32_arm_allocate_interworking_sections (info
);
16059 /* For every jump slot reserved in the sgotplt, reloc_count is
16060 incremented. However, when we reserve space for TLS descriptors,
16061 it's not incremented, so in order to compute the space reserved
16062 for them, it suffices to multiply the reloc count by the jump
16064 if (htab
->root
.srelplt
)
16065 htab
->sgotplt_jump_table_size
= elf32_arm_compute_jump_table_size(htab
);
16067 if (htab
->tls_trampoline
)
16069 if (htab
->root
.splt
->size
== 0)
16070 htab
->root
.splt
->size
+= htab
->plt_header_size
;
16072 htab
->tls_trampoline
= htab
->root
.splt
->size
;
16073 htab
->root
.splt
->size
+= htab
->plt_entry_size
;
16075 /* If we're not using lazy TLS relocations, don't generate the
16076 PLT and GOT entries they require. */
16077 if (!(info
->flags
& DF_BIND_NOW
))
16079 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
16080 htab
->root
.sgot
->size
+= 4;
16082 htab
->dt_tlsdesc_plt
= htab
->root
.splt
->size
;
16083 htab
->root
.splt
->size
+= 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline
);
16087 /* The check_relocs and adjust_dynamic_symbol entry points have
16088 determined the sizes of the various dynamic sections. Allocate
16089 memory for them. */
16092 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
16096 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
16099 /* It's OK to base decisions on the section name, because none
16100 of the dynobj section names depend upon the input files. */
16101 name
= bfd_get_section_name (dynobj
, s
);
16103 if (s
== htab
->root
.splt
)
16105 /* Remember whether there is a PLT. */
16106 plt
= s
->size
!= 0;
16108 else if (CONST_STRNEQ (name
, ".rel"))
16112 /* Remember whether there are any reloc sections other
16113 than .rel(a).plt and .rela.plt.unloaded. */
16114 if (s
!= htab
->root
.srelplt
&& s
!= htab
->srelplt2
)
16117 /* We use the reloc_count field as a counter if we need
16118 to copy relocs into the output file. */
16119 s
->reloc_count
= 0;
16122 else if (s
!= htab
->root
.sgot
16123 && s
!= htab
->root
.sgotplt
16124 && s
!= htab
->root
.iplt
16125 && s
!= htab
->root
.igotplt
16126 && s
!= htab
->root
.sdynbss
16127 && s
!= htab
->root
.sdynrelro
)
16129 /* It's not one of our sections, so don't allocate space. */
16135 /* If we don't need this section, strip it from the
16136 output file. This is mostly to handle .rel(a).bss and
16137 .rel(a).plt. We must create both sections in
16138 create_dynamic_sections, because they must be created
16139 before the linker maps input sections to output
16140 sections. The linker does that before
16141 adjust_dynamic_symbol is called, and it is that
16142 function which decides whether anything needs to go
16143 into these sections. */
16144 s
->flags
|= SEC_EXCLUDE
;
16148 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
16151 /* Allocate memory for the section contents. */
16152 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
16153 if (s
->contents
== NULL
)
16157 if (elf_hash_table (info
)->dynamic_sections_created
)
16159 /* Add some entries to the .dynamic section. We fill in the
16160 values later, in elf32_arm_finish_dynamic_sections, but we
16161 must add the entries now so that we get the correct size for
16162 the .dynamic section. The DT_DEBUG entry is filled in by the
16163 dynamic linker and used by the debugger. */
16164 #define add_dynamic_entry(TAG, VAL) \
16165 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
16167 if (bfd_link_executable (info
))
16169 if (!add_dynamic_entry (DT_DEBUG
, 0))
16175 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
16176 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
16177 || !add_dynamic_entry (DT_PLTREL
,
16178 htab
->use_rel
? DT_REL
: DT_RELA
)
16179 || !add_dynamic_entry (DT_JMPREL
, 0))
16182 if (htab
->dt_tlsdesc_plt
16183 && (!add_dynamic_entry (DT_TLSDESC_PLT
,0)
16184 || !add_dynamic_entry (DT_TLSDESC_GOT
,0)))
16192 if (!add_dynamic_entry (DT_REL
, 0)
16193 || !add_dynamic_entry (DT_RELSZ
, 0)
16194 || !add_dynamic_entry (DT_RELENT
, RELOC_SIZE (htab
)))
16199 if (!add_dynamic_entry (DT_RELA
, 0)
16200 || !add_dynamic_entry (DT_RELASZ
, 0)
16201 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
16206 /* If any dynamic relocs apply to a read-only section,
16207 then we need a DT_TEXTREL entry. */
16208 if ((info
->flags
& DF_TEXTREL
) == 0)
16209 elf_link_hash_traverse (& htab
->root
, elf32_arm_readonly_dynrelocs
,
16212 if ((info
->flags
& DF_TEXTREL
) != 0)
16214 if (!add_dynamic_entry (DT_TEXTREL
, 0))
16217 if (htab
->vxworks_p
16218 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
16221 #undef add_dynamic_entry
16226 /* Size sections even though they're not dynamic. We use it to setup
16227 _TLS_MODULE_BASE_, if needed. */
16230 elf32_arm_always_size_sections (bfd
*output_bfd
,
16231 struct bfd_link_info
*info
)
16235 if (bfd_link_relocatable (info
))
16238 tls_sec
= elf_hash_table (info
)->tls_sec
;
16242 struct elf_link_hash_entry
*tlsbase
;
16244 tlsbase
= elf_link_hash_lookup
16245 (elf_hash_table (info
), "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
16249 struct bfd_link_hash_entry
*bh
= NULL
;
16250 const struct elf_backend_data
*bed
16251 = get_elf_backend_data (output_bfd
);
16253 if (!(_bfd_generic_link_add_one_symbol
16254 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
16255 tls_sec
, 0, NULL
, FALSE
,
16256 bed
->collect
, &bh
)))
16259 tlsbase
->type
= STT_TLS
;
16260 tlsbase
= (struct elf_link_hash_entry
*)bh
;
16261 tlsbase
->def_regular
= 1;
16262 tlsbase
->other
= STV_HIDDEN
;
16263 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
16269 /* Finish up dynamic symbol handling. We set the contents of various
16270 dynamic sections here. */
16273 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
,
16274 struct bfd_link_info
* info
,
16275 struct elf_link_hash_entry
* h
,
16276 Elf_Internal_Sym
* sym
)
16278 struct elf32_arm_link_hash_table
*htab
;
16279 struct elf32_arm_link_hash_entry
*eh
;
16281 htab
= elf32_arm_hash_table (info
);
16285 eh
= (struct elf32_arm_link_hash_entry
*) h
;
16287 if (h
->plt
.offset
!= (bfd_vma
) -1)
16291 BFD_ASSERT (h
->dynindx
!= -1);
16292 if (! elf32_arm_populate_plt_entry (output_bfd
, info
, &h
->plt
, &eh
->plt
,
16297 if (!h
->def_regular
)
16299 /* Mark the symbol as undefined, rather than as defined in
16300 the .plt section. */
16301 sym
->st_shndx
= SHN_UNDEF
;
16302 /* If the symbol is weak we need to clear the value.
16303 Otherwise, the PLT entry would provide a definition for
16304 the symbol even if the symbol wasn't defined anywhere,
16305 and so the symbol would never be NULL. Leave the value if
16306 there were any relocations where pointer equality matters
16307 (this is a clue for the dynamic linker, to make function
16308 pointer comparisons work between an application and shared
16310 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
16313 else if (eh
->is_iplt
&& eh
->plt
.noncall_refcount
!= 0)
16315 /* At least one non-call relocation references this .iplt entry,
16316 so the .iplt entry is the function's canonical address. */
16317 sym
->st_info
= ELF_ST_INFO (ELF_ST_BIND (sym
->st_info
), STT_FUNC
);
16318 ARM_SET_SYM_BRANCH_TYPE (sym
->st_target_internal
, ST_BRANCH_TO_ARM
);
16319 sym
->st_shndx
= (_bfd_elf_section_from_bfd_section
16320 (output_bfd
, htab
->root
.iplt
->output_section
));
16321 sym
->st_value
= (h
->plt
.offset
16322 + htab
->root
.iplt
->output_section
->vma
16323 + htab
->root
.iplt
->output_offset
);
16330 Elf_Internal_Rela rel
;
16332 /* This symbol needs a copy reloc. Set it up. */
16333 BFD_ASSERT (h
->dynindx
!= -1
16334 && (h
->root
.type
== bfd_link_hash_defined
16335 || h
->root
.type
== bfd_link_hash_defweak
));
16338 rel
.r_offset
= (h
->root
.u
.def
.value
16339 + h
->root
.u
.def
.section
->output_section
->vma
16340 + h
->root
.u
.def
.section
->output_offset
);
16341 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
16342 if (h
->root
.u
.def
.section
== htab
->root
.sdynrelro
)
16343 s
= htab
->root
.sreldynrelro
;
16345 s
= htab
->root
.srelbss
;
16346 elf32_arm_add_dynreloc (output_bfd
, info
, s
, &rel
);
16349 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
16350 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
16351 to the ".got" section. */
16352 if (h
== htab
->root
.hdynamic
16353 || (!htab
->vxworks_p
&& h
== htab
->root
.hgot
))
16354 sym
->st_shndx
= SHN_ABS
;
16360 arm_put_trampoline (struct elf32_arm_link_hash_table
*htab
, bfd
*output_bfd
,
16362 const unsigned long *template, unsigned count
)
16366 for (ix
= 0; ix
!= count
; ix
++)
16368 unsigned long insn
= template[ix
];
16370 /* Emit mov pc,rx if bx is not permitted. */
16371 if (htab
->fix_v4bx
== 1 && (insn
& 0x0ffffff0) == 0x012fff10)
16372 insn
= (insn
& 0xf000000f) | 0x01a0f000;
16373 put_arm_insn (htab
, output_bfd
, insn
, (char *)contents
+ ix
*4);
16377 /* Install the special first PLT entry for elf32-arm-nacl. Unlike
16378 other variants, NaCl needs this entry in a static executable's
16379 .iplt too. When we're handling that case, GOT_DISPLACEMENT is
16380 zero. For .iplt really only the last bundle is useful, and .iplt
16381 could have a shorter first entry, with each individual PLT entry's
16382 relative branch calculated differently so it targets the last
16383 bundle instead of the instruction before it (labelled .Lplt_tail
16384 above). But it's simpler to keep the size and layout of PLT0
16385 consistent with the dynamic case, at the cost of some dead code at
16386 the start of .iplt and the one dead store to the stack at the start
16389 arm_nacl_put_plt0 (struct elf32_arm_link_hash_table
*htab
, bfd
*output_bfd
,
16390 asection
*plt
, bfd_vma got_displacement
)
16394 put_arm_insn (htab
, output_bfd
,
16395 elf32_arm_nacl_plt0_entry
[0]
16396 | arm_movw_immediate (got_displacement
),
16397 plt
->contents
+ 0);
16398 put_arm_insn (htab
, output_bfd
,
16399 elf32_arm_nacl_plt0_entry
[1]
16400 | arm_movt_immediate (got_displacement
),
16401 plt
->contents
+ 4);
16403 for (i
= 2; i
< ARRAY_SIZE (elf32_arm_nacl_plt0_entry
); ++i
)
16404 put_arm_insn (htab
, output_bfd
,
16405 elf32_arm_nacl_plt0_entry
[i
],
16406 plt
->contents
+ (i
* 4));
16409 /* Finish up the dynamic sections. */
16412 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
16417 struct elf32_arm_link_hash_table
*htab
;
16419 htab
= elf32_arm_hash_table (info
);
16423 dynobj
= elf_hash_table (info
)->dynobj
;
16425 sgot
= htab
->root
.sgotplt
;
16426 /* A broken linker script might have discarded the dynamic sections.
16427 Catch this here so that we do not seg-fault later on. */
16428 if (sgot
!= NULL
&& bfd_is_abs_section (sgot
->output_section
))
16430 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
16432 if (elf_hash_table (info
)->dynamic_sections_created
)
16435 Elf32_External_Dyn
*dyncon
, *dynconend
;
16437 splt
= htab
->root
.splt
;
16438 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
16439 BFD_ASSERT (htab
->symbian_p
|| sgot
!= NULL
);
16441 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
16442 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
16444 for (; dyncon
< dynconend
; dyncon
++)
16446 Elf_Internal_Dyn dyn
;
16450 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
16457 if (htab
->vxworks_p
16458 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
16459 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16464 goto get_vma_if_bpabi
;
16467 goto get_vma_if_bpabi
;
16470 goto get_vma_if_bpabi
;
16472 name
= ".gnu.version";
16473 goto get_vma_if_bpabi
;
16475 name
= ".gnu.version_d";
16476 goto get_vma_if_bpabi
;
16478 name
= ".gnu.version_r";
16479 goto get_vma_if_bpabi
;
16482 name
= htab
->symbian_p
? ".got" : ".got.plt";
16485 name
= RELOC_SECTION (htab
, ".plt");
16487 s
= bfd_get_linker_section (dynobj
, name
);
16491 (_("could not find section %s"), name
);
16492 bfd_set_error (bfd_error_invalid_operation
);
16495 if (!htab
->symbian_p
)
16496 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
16498 /* In the BPABI, tags in the PT_DYNAMIC section point
16499 at the file offset, not the memory address, for the
16500 convenience of the post linker. */
16501 dyn
.d_un
.d_ptr
= s
->output_section
->filepos
+ s
->output_offset
;
16502 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16506 if (htab
->symbian_p
)
16511 s
= htab
->root
.srelplt
;
16512 BFD_ASSERT (s
!= NULL
);
16513 dyn
.d_un
.d_val
= s
->size
;
16514 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16521 /* In the BPABI, the DT_REL tag must point at the file
16522 offset, not the VMA, of the first relocation
16523 section. So, we use code similar to that in
16524 elflink.c, but do not check for SHF_ALLOC on the
16525 relocation section, since relocation sections are
16526 never allocated under the BPABI. PLT relocs are also
16528 if (htab
->symbian_p
)
16531 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
16532 ? SHT_REL
: SHT_RELA
);
16533 dyn
.d_un
.d_val
= 0;
16534 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
16536 Elf_Internal_Shdr
*hdr
16537 = elf_elfsections (output_bfd
)[i
];
16538 if (hdr
->sh_type
== type
)
16540 if (dyn
.d_tag
== DT_RELSZ
16541 || dyn
.d_tag
== DT_RELASZ
)
16542 dyn
.d_un
.d_val
+= hdr
->sh_size
;
16543 else if ((ufile_ptr
) hdr
->sh_offset
16544 <= dyn
.d_un
.d_val
- 1)
16545 dyn
.d_un
.d_val
= hdr
->sh_offset
;
16548 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16552 case DT_TLSDESC_PLT
:
16553 s
= htab
->root
.splt
;
16554 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
16555 + htab
->dt_tlsdesc_plt
);
16556 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16559 case DT_TLSDESC_GOT
:
16560 s
= htab
->root
.sgot
;
16561 dyn
.d_un
.d_ptr
= (s
->output_section
->vma
+ s
->output_offset
16562 + htab
->dt_tlsdesc_got
);
16563 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16566 /* Set the bottom bit of DT_INIT/FINI if the
16567 corresponding function is Thumb. */
16569 name
= info
->init_function
;
16572 name
= info
->fini_function
;
16574 /* If it wasn't set by elf_bfd_final_link
16575 then there is nothing to adjust. */
16576 if (dyn
.d_un
.d_val
!= 0)
16578 struct elf_link_hash_entry
* eh
;
16580 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
16581 FALSE
, FALSE
, TRUE
);
16583 && ARM_GET_SYM_BRANCH_TYPE (eh
->target_internal
)
16584 == ST_BRANCH_TO_THUMB
)
16586 dyn
.d_un
.d_val
|= 1;
16587 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
16594 /* Fill in the first entry in the procedure linkage table. */
16595 if (splt
->size
> 0 && htab
->plt_header_size
)
16597 const bfd_vma
*plt0_entry
;
16598 bfd_vma got_address
, plt_address
, got_displacement
;
16600 /* Calculate the addresses of the GOT and PLT. */
16601 got_address
= sgot
->output_section
->vma
+ sgot
->output_offset
;
16602 plt_address
= splt
->output_section
->vma
+ splt
->output_offset
;
16604 if (htab
->vxworks_p
)
16606 /* The VxWorks GOT is relocated by the dynamic linker.
16607 Therefore, we must emit relocations rather than simply
16608 computing the values now. */
16609 Elf_Internal_Rela rel
;
16611 plt0_entry
= elf32_arm_vxworks_exec_plt0_entry
;
16612 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
16613 splt
->contents
+ 0);
16614 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
16615 splt
->contents
+ 4);
16616 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
16617 splt
->contents
+ 8);
16618 bfd_put_32 (output_bfd
, got_address
, splt
->contents
+ 12);
16620 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
16621 rel
.r_offset
= plt_address
+ 12;
16622 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
16624 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
,
16625 htab
->srelplt2
->contents
);
16627 else if (htab
->nacl_p
)
16628 arm_nacl_put_plt0 (htab
, output_bfd
, splt
,
16629 got_address
+ 8 - (plt_address
+ 16));
16630 else if (using_thumb_only (htab
))
16632 got_displacement
= got_address
- (plt_address
+ 12);
16634 plt0_entry
= elf32_thumb2_plt0_entry
;
16635 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
16636 splt
->contents
+ 0);
16637 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
16638 splt
->contents
+ 4);
16639 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
16640 splt
->contents
+ 8);
16642 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 12);
16646 got_displacement
= got_address
- (plt_address
+ 16);
16648 plt0_entry
= elf32_arm_plt0_entry
;
16649 put_arm_insn (htab
, output_bfd
, plt0_entry
[0],
16650 splt
->contents
+ 0);
16651 put_arm_insn (htab
, output_bfd
, plt0_entry
[1],
16652 splt
->contents
+ 4);
16653 put_arm_insn (htab
, output_bfd
, plt0_entry
[2],
16654 splt
->contents
+ 8);
16655 put_arm_insn (htab
, output_bfd
, plt0_entry
[3],
16656 splt
->contents
+ 12);
16658 #ifdef FOUR_WORD_PLT
16659 /* The displacement value goes in the otherwise-unused
16660 last word of the second entry. */
16661 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
16663 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
16668 /* UnixWare sets the entsize of .plt to 4, although that doesn't
16669 really seem like the right value. */
16670 if (splt
->output_section
->owner
== output_bfd
)
16671 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
16673 if (htab
->dt_tlsdesc_plt
)
16675 bfd_vma got_address
16676 = sgot
->output_section
->vma
+ sgot
->output_offset
;
16677 bfd_vma gotplt_address
= (htab
->root
.sgot
->output_section
->vma
16678 + htab
->root
.sgot
->output_offset
);
16679 bfd_vma plt_address
16680 = splt
->output_section
->vma
+ splt
->output_offset
;
16682 arm_put_trampoline (htab
, output_bfd
,
16683 splt
->contents
+ htab
->dt_tlsdesc_plt
,
16684 dl_tlsdesc_lazy_trampoline
, 6);
16686 bfd_put_32 (output_bfd
,
16687 gotplt_address
+ htab
->dt_tlsdesc_got
16688 - (plt_address
+ htab
->dt_tlsdesc_plt
)
16689 - dl_tlsdesc_lazy_trampoline
[6],
16690 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24);
16691 bfd_put_32 (output_bfd
,
16692 got_address
- (plt_address
+ htab
->dt_tlsdesc_plt
)
16693 - dl_tlsdesc_lazy_trampoline
[7],
16694 splt
->contents
+ htab
->dt_tlsdesc_plt
+ 24 + 4);
16697 if (htab
->tls_trampoline
)
16699 arm_put_trampoline (htab
, output_bfd
,
16700 splt
->contents
+ htab
->tls_trampoline
,
16701 tls_trampoline
, 3);
16702 #ifdef FOUR_WORD_PLT
16703 bfd_put_32 (output_bfd
, 0x00000000,
16704 splt
->contents
+ htab
->tls_trampoline
+ 12);
16708 if (htab
->vxworks_p
16709 && !bfd_link_pic (info
)
16710 && htab
->root
.splt
->size
> 0)
16712 /* Correct the .rel(a).plt.unloaded relocations. They will have
16713 incorrect symbol indexes. */
16717 num_plts
= ((htab
->root
.splt
->size
- htab
->plt_header_size
)
16718 / htab
->plt_entry_size
);
16719 p
= htab
->srelplt2
->contents
+ RELOC_SIZE (htab
);
16721 for (; num_plts
; num_plts
--)
16723 Elf_Internal_Rela rel
;
16725 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
16726 rel
.r_info
= ELF32_R_INFO (htab
->root
.hgot
->indx
, R_ARM_ABS32
);
16727 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
16728 p
+= RELOC_SIZE (htab
);
16730 SWAP_RELOC_IN (htab
) (output_bfd
, p
, &rel
);
16731 rel
.r_info
= ELF32_R_INFO (htab
->root
.hplt
->indx
, R_ARM_ABS32
);
16732 SWAP_RELOC_OUT (htab
) (output_bfd
, &rel
, p
);
16733 p
+= RELOC_SIZE (htab
);
16738 if (htab
->nacl_p
&& htab
->root
.iplt
!= NULL
&& htab
->root
.iplt
->size
> 0)
16739 /* NaCl uses a special first entry in .iplt too. */
16740 arm_nacl_put_plt0 (htab
, output_bfd
, htab
->root
.iplt
, 0);
16742 /* Fill in the first three entries in the global offset table. */
16745 if (sgot
->size
> 0)
16748 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
16750 bfd_put_32 (output_bfd
,
16751 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
16753 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
16754 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
16757 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
16764 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
16766 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
16767 struct elf32_arm_link_hash_table
*globals
;
16768 struct elf_segment_map
*m
;
16770 i_ehdrp
= elf_elfheader (abfd
);
16772 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_UNKNOWN
)
16773 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_ARM
;
16775 _bfd_elf_post_process_headers (abfd
, link_info
);
16776 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
16780 globals
= elf32_arm_hash_table (link_info
);
16781 if (globals
!= NULL
&& globals
->byteswap_code
)
16782 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
16785 if (EF_ARM_EABI_VERSION (i_ehdrp
->e_flags
) == EF_ARM_EABI_VER5
16786 && ((i_ehdrp
->e_type
== ET_DYN
) || (i_ehdrp
->e_type
== ET_EXEC
)))
16788 int abi
= bfd_elf_get_obj_attr_int (abfd
, OBJ_ATTR_PROC
, Tag_ABI_VFP_args
);
16789 if (abi
== AEABI_VFP_args_vfp
)
16790 i_ehdrp
->e_flags
|= EF_ARM_ABI_FLOAT_HARD
;
16792 i_ehdrp
->e_flags
|= EF_ARM_ABI_FLOAT_SOFT
;
16795 /* Scan segment to set p_flags attribute if it contains only sections with
16796 SHF_ARM_PURECODE flag. */
16797 for (m
= elf_seg_map (abfd
); m
!= NULL
; m
= m
->next
)
16803 for (j
= 0; j
< m
->count
; j
++)
16805 if (!(elf_section_flags (m
->sections
[j
]) & SHF_ARM_PURECODE
))
16811 m
->p_flags_valid
= 1;
16816 static enum elf_reloc_type_class
16817 elf32_arm_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
16818 const asection
*rel_sec ATTRIBUTE_UNUSED
,
16819 const Elf_Internal_Rela
*rela
)
16821 switch ((int) ELF32_R_TYPE (rela
->r_info
))
16823 case R_ARM_RELATIVE
:
16824 return reloc_class_relative
;
16825 case R_ARM_JUMP_SLOT
:
16826 return reloc_class_plt
;
16828 return reloc_class_copy
;
16829 case R_ARM_IRELATIVE
:
16830 return reloc_class_ifunc
;
16832 return reloc_class_normal
;
16837 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
16839 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
16842 /* Return TRUE if this is an unwinding table entry. */
16845 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
16847 return (CONST_STRNEQ (name
, ELF_STRING_ARM_unwind
)
16848 || CONST_STRNEQ (name
, ELF_STRING_ARM_unwind_once
));
16852 /* Set the type and flags for an ARM section. We do this by
16853 the section name, which is a hack, but ought to work. */
16856 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
16860 name
= bfd_get_section_name (abfd
, sec
);
16862 if (is_arm_elf_unwind_section_name (abfd
, name
))
16864 hdr
->sh_type
= SHT_ARM_EXIDX
;
16865 hdr
->sh_flags
|= SHF_LINK_ORDER
;
16868 if (sec
->flags
& SEC_ELF_PURECODE
)
16869 hdr
->sh_flags
|= SHF_ARM_PURECODE
;
16874 /* Handle an ARM specific section when reading an object file. This is
16875 called when bfd_section_from_shdr finds a section with an unknown
16879 elf32_arm_section_from_shdr (bfd
*abfd
,
16880 Elf_Internal_Shdr
* hdr
,
16884 /* There ought to be a place to keep ELF backend specific flags, but
16885 at the moment there isn't one. We just keep track of the
16886 sections by their name, instead. Fortunately, the ABI gives
16887 names for all the ARM specific sections, so we will probably get
16889 switch (hdr
->sh_type
)
16891 case SHT_ARM_EXIDX
:
16892 case SHT_ARM_PREEMPTMAP
:
16893 case SHT_ARM_ATTRIBUTES
:
16900 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
16906 static _arm_elf_section_data
*
16907 get_arm_elf_section_data (asection
* sec
)
16909 if (sec
&& sec
->owner
&& is_arm_elf (sec
->owner
))
16910 return elf32_arm_section_data (sec
);
16918 struct bfd_link_info
*info
;
16921 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
16922 asection
*, struct elf_link_hash_entry
*);
16923 } output_arch_syminfo
;
16925 enum map_symbol_type
16933 /* Output a single mapping symbol. */
16936 elf32_arm_output_map_sym (output_arch_syminfo
*osi
,
16937 enum map_symbol_type type
,
16940 static const char *names
[3] = {"$a", "$t", "$d"};
16941 Elf_Internal_Sym sym
;
16943 sym
.st_value
= osi
->sec
->output_section
->vma
16944 + osi
->sec
->output_offset
16948 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
16949 sym
.st_shndx
= osi
->sec_shndx
;
16950 sym
.st_target_internal
= 0;
16951 elf32_arm_section_map_add (osi
->sec
, names
[type
][1], offset
);
16952 return osi
->func (osi
->flaginfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
16955 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
16956 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
16959 elf32_arm_output_plt_map_1 (output_arch_syminfo
*osi
,
16960 bfd_boolean is_iplt_entry_p
,
16961 union gotplt_union
*root_plt
,
16962 struct arm_plt_info
*arm_plt
)
16964 struct elf32_arm_link_hash_table
*htab
;
16965 bfd_vma addr
, plt_header_size
;
16967 if (root_plt
->offset
== (bfd_vma
) -1)
16970 htab
= elf32_arm_hash_table (osi
->info
);
16974 if (is_iplt_entry_p
)
16976 osi
->sec
= htab
->root
.iplt
;
16977 plt_header_size
= 0;
16981 osi
->sec
= htab
->root
.splt
;
16982 plt_header_size
= htab
->plt_header_size
;
16984 osi
->sec_shndx
= (_bfd_elf_section_from_bfd_section
16985 (osi
->info
->output_bfd
, osi
->sec
->output_section
));
16987 addr
= root_plt
->offset
& -2;
16988 if (htab
->symbian_p
)
16990 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
16992 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 4))
16995 else if (htab
->vxworks_p
)
16997 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
16999 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 8))
17001 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
+ 12))
17003 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 20))
17006 else if (htab
->nacl_p
)
17008 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
17011 else if (using_thumb_only (htab
))
17013 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
))
17018 bfd_boolean thumb_stub_p
;
17020 thumb_stub_p
= elf32_arm_plt_needs_thumb_stub_p (osi
->info
, arm_plt
);
17023 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_THUMB
, addr
- 4))
17026 #ifdef FOUR_WORD_PLT
17027 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
17029 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_DATA
, addr
+ 12))
17032 /* A three-word PLT with no Thumb thunk contains only Arm code,
17033 so only need to output a mapping symbol for the first PLT entry and
17034 entries with thumb thunks. */
17035 if (thumb_stub_p
|| addr
== plt_header_size
)
17037 if (!elf32_arm_output_map_sym (osi
, ARM_MAP_ARM
, addr
))
17046 /* Output mapping symbols for PLT entries associated with H. */
17049 elf32_arm_output_plt_map (struct elf_link_hash_entry
*h
, void *inf
)
17051 output_arch_syminfo
*osi
= (output_arch_syminfo
*) inf
;
17052 struct elf32_arm_link_hash_entry
*eh
;
17054 if (h
->root
.type
== bfd_link_hash_indirect
)
17057 if (h
->root
.type
== bfd_link_hash_warning
)
17058 /* When warning symbols are created, they **replace** the "real"
17059 entry in the hash table, thus we never get to see the real
17060 symbol in a hash traversal. So look at it now. */
17061 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
17063 eh
= (struct elf32_arm_link_hash_entry
*) h
;
17064 return elf32_arm_output_plt_map_1 (osi
, SYMBOL_CALLS_LOCAL (osi
->info
, h
),
17065 &h
->plt
, &eh
->plt
);
17068 /* Bind a veneered symbol to its veneer identified by its hash entry
17069 STUB_ENTRY. The veneered location thus loose its symbol. */
17072 arm_stub_claim_sym (struct elf32_arm_stub_hash_entry
*stub_entry
)
17074 struct elf32_arm_link_hash_entry
*hash
= stub_entry
->h
;
17077 hash
->root
.root
.u
.def
.section
= stub_entry
->stub_sec
;
17078 hash
->root
.root
.u
.def
.value
= stub_entry
->stub_offset
;
17079 hash
->root
.size
= stub_entry
->stub_size
;
17082 /* Output a single local symbol for a generated stub. */
17085 elf32_arm_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
17086 bfd_vma offset
, bfd_vma size
)
17088 Elf_Internal_Sym sym
;
17090 sym
.st_value
= osi
->sec
->output_section
->vma
17091 + osi
->sec
->output_offset
17093 sym
.st_size
= size
;
17095 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
17096 sym
.st_shndx
= osi
->sec_shndx
;
17097 sym
.st_target_internal
= 0;
17098 return osi
->func (osi
->flaginfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
17102 arm_map_one_stub (struct bfd_hash_entry
* gen_entry
,
17105 struct elf32_arm_stub_hash_entry
*stub_entry
;
17106 asection
*stub_sec
;
17109 output_arch_syminfo
*osi
;
17110 const insn_sequence
*template_sequence
;
17111 enum stub_insn_type prev_type
;
17114 enum map_symbol_type sym_type
;
17116 /* Massage our args to the form they really have. */
17117 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
17118 osi
= (output_arch_syminfo
*) in_arg
;
17120 stub_sec
= stub_entry
->stub_sec
;
17122 /* Ensure this stub is attached to the current section being
17124 if (stub_sec
!= osi
->sec
)
17127 addr
= (bfd_vma
) stub_entry
->stub_offset
;
17128 template_sequence
= stub_entry
->stub_template
;
17130 if (arm_stub_sym_claimed (stub_entry
->stub_type
))
17131 arm_stub_claim_sym (stub_entry
);
17134 stub_name
= stub_entry
->output_name
;
17135 switch (template_sequence
[0].type
)
17138 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
,
17139 stub_entry
->stub_size
))
17144 if (!elf32_arm_output_stub_sym (osi
, stub_name
, addr
| 1,
17145 stub_entry
->stub_size
))
17154 prev_type
= DATA_TYPE
;
17156 for (i
= 0; i
< stub_entry
->stub_template_size
; i
++)
17158 switch (template_sequence
[i
].type
)
17161 sym_type
= ARM_MAP_ARM
;
17166 sym_type
= ARM_MAP_THUMB
;
17170 sym_type
= ARM_MAP_DATA
;
17178 if (template_sequence
[i
].type
!= prev_type
)
17180 prev_type
= template_sequence
[i
].type
;
17181 if (!elf32_arm_output_map_sym (osi
, sym_type
, addr
+ size
))
17185 switch (template_sequence
[i
].type
)
17209 /* Output mapping symbols for linker generated sections,
17210 and for those data-only sections that do not have a
17214 elf32_arm_output_arch_local_syms (bfd
*output_bfd
,
17215 struct bfd_link_info
*info
,
17217 int (*func
) (void *, const char *,
17218 Elf_Internal_Sym
*,
17220 struct elf_link_hash_entry
*))
17222 output_arch_syminfo osi
;
17223 struct elf32_arm_link_hash_table
*htab
;
17225 bfd_size_type size
;
17228 htab
= elf32_arm_hash_table (info
);
17232 check_use_blx (htab
);
17234 osi
.flaginfo
= flaginfo
;
17238 /* Add a $d mapping symbol to data-only sections that
17239 don't have any mapping symbol. This may result in (harmless) redundant
17240 mapping symbols. */
17241 for (input_bfd
= info
->input_bfds
;
17243 input_bfd
= input_bfd
->link
.next
)
17245 if ((input_bfd
->flags
& (BFD_LINKER_CREATED
| HAS_SYMS
)) == HAS_SYMS
)
17246 for (osi
.sec
= input_bfd
->sections
;
17248 osi
.sec
= osi
.sec
->next
)
17250 if (osi
.sec
->output_section
!= NULL
17251 && ((osi
.sec
->output_section
->flags
& (SEC_ALLOC
| SEC_CODE
))
17253 && (osi
.sec
->flags
& (SEC_HAS_CONTENTS
| SEC_LINKER_CREATED
))
17254 == SEC_HAS_CONTENTS
17255 && get_arm_elf_section_data (osi
.sec
) != NULL
17256 && get_arm_elf_section_data (osi
.sec
)->mapcount
== 0
17257 && osi
.sec
->size
> 0
17258 && (osi
.sec
->flags
& SEC_EXCLUDE
) == 0)
17260 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
17261 (output_bfd
, osi
.sec
->output_section
);
17262 if (osi
.sec_shndx
!= (int)SHN_BAD
)
17263 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 0);
17268 /* ARM->Thumb glue. */
17269 if (htab
->arm_glue_size
> 0)
17271 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
17272 ARM2THUMB_GLUE_SECTION_NAME
);
17274 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
17275 (output_bfd
, osi
.sec
->output_section
);
17276 if (bfd_link_pic (info
) || htab
->root
.is_relocatable_executable
17277 || htab
->pic_veneer
)
17278 size
= ARM2THUMB_PIC_GLUE_SIZE
;
17279 else if (htab
->use_blx
)
17280 size
= ARM2THUMB_V5_STATIC_GLUE_SIZE
;
17282 size
= ARM2THUMB_STATIC_GLUE_SIZE
;
17284 for (offset
= 0; offset
< htab
->arm_glue_size
; offset
+= size
)
17286 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
);
17287 elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, offset
+ size
- 4);
17291 /* Thumb->ARM glue. */
17292 if (htab
->thumb_glue_size
> 0)
17294 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
17295 THUMB2ARM_GLUE_SECTION_NAME
);
17297 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
17298 (output_bfd
, osi
.sec
->output_section
);
17299 size
= THUMB2ARM_GLUE_SIZE
;
17301 for (offset
= 0; offset
< htab
->thumb_glue_size
; offset
+= size
)
17303 elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, offset
);
17304 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, offset
+ 4);
17308 /* ARMv4 BX veneers. */
17309 if (htab
->bx_glue_size
> 0)
17311 osi
.sec
= bfd_get_linker_section (htab
->bfd_of_glue_owner
,
17312 ARM_BX_GLUE_SECTION_NAME
);
17314 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
17315 (output_bfd
, osi
.sec
->output_section
);
17317 elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0);
17320 /* Long calls stubs. */
17321 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
17323 asection
* stub_sec
;
17325 for (stub_sec
= htab
->stub_bfd
->sections
;
17327 stub_sec
= stub_sec
->next
)
17329 /* Ignore non-stub sections. */
17330 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
17333 osi
.sec
= stub_sec
;
17335 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
17336 (output_bfd
, osi
.sec
->output_section
);
17338 bfd_hash_traverse (&htab
->stub_hash_table
, arm_map_one_stub
, &osi
);
17342 /* Finally, output mapping symbols for the PLT. */
17343 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
17345 osi
.sec
= htab
->root
.splt
;
17346 osi
.sec_shndx
= (_bfd_elf_section_from_bfd_section
17347 (output_bfd
, osi
.sec
->output_section
));
17349 /* Output mapping symbols for the plt header. SymbianOS does not have a
17351 if (htab
->vxworks_p
)
17353 /* VxWorks shared libraries have no PLT header. */
17354 if (!bfd_link_pic (info
))
17356 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
17358 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
17362 else if (htab
->nacl_p
)
17364 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
17367 else if (using_thumb_only (htab
))
17369 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, 0))
17371 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 12))
17373 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_THUMB
, 16))
17376 else if (!htab
->symbian_p
)
17378 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
17380 #ifndef FOUR_WORD_PLT
17381 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
, 16))
17386 if (htab
->nacl_p
&& htab
->root
.iplt
&& htab
->root
.iplt
->size
> 0)
17388 /* NaCl uses a special first entry in .iplt too. */
17389 osi
.sec
= htab
->root
.iplt
;
17390 osi
.sec_shndx
= (_bfd_elf_section_from_bfd_section
17391 (output_bfd
, osi
.sec
->output_section
));
17392 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, 0))
17395 if ((htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
17396 || (htab
->root
.iplt
&& htab
->root
.iplt
->size
> 0))
17398 elf_link_hash_traverse (&htab
->root
, elf32_arm_output_plt_map
, &osi
);
17399 for (input_bfd
= info
->input_bfds
;
17401 input_bfd
= input_bfd
->link
.next
)
17403 struct arm_local_iplt_info
**local_iplt
;
17404 unsigned int i
, num_syms
;
17406 local_iplt
= elf32_arm_local_iplt (input_bfd
);
17407 if (local_iplt
!= NULL
)
17409 num_syms
= elf_symtab_hdr (input_bfd
).sh_info
;
17410 for (i
= 0; i
< num_syms
; i
++)
17411 if (local_iplt
[i
] != NULL
17412 && !elf32_arm_output_plt_map_1 (&osi
, TRUE
,
17413 &local_iplt
[i
]->root
,
17414 &local_iplt
[i
]->arm
))
17419 if (htab
->dt_tlsdesc_plt
!= 0)
17421 /* Mapping symbols for the lazy tls trampoline. */
17422 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->dt_tlsdesc_plt
))
17425 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
17426 htab
->dt_tlsdesc_plt
+ 24))
17429 if (htab
->tls_trampoline
!= 0)
17431 /* Mapping symbols for the tls trampoline. */
17432 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_ARM
, htab
->tls_trampoline
))
17434 #ifdef FOUR_WORD_PLT
17435 if (!elf32_arm_output_map_sym (&osi
, ARM_MAP_DATA
,
17436 htab
->tls_trampoline
+ 12))
17444 /* Filter normal symbols of CMSE entry functions of ABFD to include in
17445 the import library. All SYMCOUNT symbols of ABFD can be examined
17446 from their pointers in SYMS. Pointers of symbols to keep should be
17447 stored continuously at the beginning of that array.
17449 Returns the number of symbols to keep. */
17451 static unsigned int
17452 elf32_arm_filter_cmse_symbols (bfd
*abfd ATTRIBUTE_UNUSED
,
17453 struct bfd_link_info
*info
,
17454 asymbol
**syms
, long symcount
)
17458 long src_count
, dst_count
= 0;
17459 struct elf32_arm_link_hash_table
*htab
;
17461 htab
= elf32_arm_hash_table (info
);
17462 if (!htab
->stub_bfd
|| !htab
->stub_bfd
->sections
)
17466 cmse_name
= (char *) bfd_malloc (maxnamelen
);
17467 for (src_count
= 0; src_count
< symcount
; src_count
++)
17469 struct elf32_arm_link_hash_entry
*cmse_hash
;
17475 sym
= syms
[src_count
];
17476 flags
= sym
->flags
;
17477 name
= (char *) bfd_asymbol_name (sym
);
17479 if ((flags
& BSF_FUNCTION
) != BSF_FUNCTION
)
17481 if (!(flags
& (BSF_GLOBAL
| BSF_WEAK
)))
17484 namelen
= strlen (name
) + sizeof (CMSE_PREFIX
) + 1;
17485 if (namelen
> maxnamelen
)
17487 cmse_name
= (char *)
17488 bfd_realloc (cmse_name
, namelen
);
17489 maxnamelen
= namelen
;
17491 snprintf (cmse_name
, maxnamelen
, "%s%s", CMSE_PREFIX
, name
);
17492 cmse_hash
= (struct elf32_arm_link_hash_entry
*)
17493 elf_link_hash_lookup (&(htab
)->root
, cmse_name
, FALSE
, FALSE
, TRUE
);
17496 || (cmse_hash
->root
.root
.type
!= bfd_link_hash_defined
17497 && cmse_hash
->root
.root
.type
!= bfd_link_hash_defweak
)
17498 || cmse_hash
->root
.type
!= STT_FUNC
)
17501 if (!ARM_GET_SYM_CMSE_SPCL (cmse_hash
->root
.target_internal
))
17504 syms
[dst_count
++] = sym
;
17508 syms
[dst_count
] = NULL
;
17513 /* Filter symbols of ABFD to include in the import library. All
17514 SYMCOUNT symbols of ABFD can be examined from their pointers in
17515 SYMS. Pointers of symbols to keep should be stored continuously at
17516 the beginning of that array.
17518 Returns the number of symbols to keep. */
17520 static unsigned int
17521 elf32_arm_filter_implib_symbols (bfd
*abfd ATTRIBUTE_UNUSED
,
17522 struct bfd_link_info
*info
,
17523 asymbol
**syms
, long symcount
)
17525 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (info
);
17527 /* Requirement 8 of "ARM v8-M Security Extensions: Requirements on
17528 Development Tools" (ARM-ECM-0359818) mandates Secure Gateway import
17529 library to be a relocatable object file. */
17530 BFD_ASSERT (!(bfd_get_file_flags (info
->out_implib_bfd
) & EXEC_P
));
17531 if (globals
->cmse_implib
)
17532 return elf32_arm_filter_cmse_symbols (abfd
, info
, syms
, symcount
);
17534 return _bfd_elf_filter_global_symbols (abfd
, info
, syms
, symcount
);
17537 /* Allocate target specific section data. */
17540 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
17542 if (!sec
->used_by_bfd
)
17544 _arm_elf_section_data
*sdata
;
17545 bfd_size_type amt
= sizeof (*sdata
);
17547 sdata
= (_arm_elf_section_data
*) bfd_zalloc (abfd
, amt
);
17550 sec
->used_by_bfd
= sdata
;
17553 return _bfd_elf_new_section_hook (abfd
, sec
);
17557 /* Used to order a list of mapping symbols by address. */
17560 elf32_arm_compare_mapping (const void * a
, const void * b
)
17562 const elf32_arm_section_map
*amap
= (const elf32_arm_section_map
*) a
;
17563 const elf32_arm_section_map
*bmap
= (const elf32_arm_section_map
*) b
;
17565 if (amap
->vma
> bmap
->vma
)
17567 else if (amap
->vma
< bmap
->vma
)
17569 else if (amap
->type
> bmap
->type
)
17570 /* Ensure results do not depend on the host qsort for objects with
17571 multiple mapping symbols at the same address by sorting on type
17574 else if (amap
->type
< bmap
->type
)
17580 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
17582 static unsigned long
17583 offset_prel31 (unsigned long addr
, bfd_vma offset
)
17585 return (addr
& ~0x7ffffffful
) | ((addr
+ offset
) & 0x7ffffffful
);
17588 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
17592 copy_exidx_entry (bfd
*output_bfd
, bfd_byte
*to
, bfd_byte
*from
, bfd_vma offset
)
17594 unsigned long first_word
= bfd_get_32 (output_bfd
, from
);
17595 unsigned long second_word
= bfd_get_32 (output_bfd
, from
+ 4);
17597 /* High bit of first word is supposed to be zero. */
17598 if ((first_word
& 0x80000000ul
) == 0)
17599 first_word
= offset_prel31 (first_word
, offset
);
17601 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
17602 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
17603 if ((second_word
!= 0x1) && ((second_word
& 0x80000000ul
) == 0))
17604 second_word
= offset_prel31 (second_word
, offset
);
17606 bfd_put_32 (output_bfd
, first_word
, to
);
17607 bfd_put_32 (output_bfd
, second_word
, to
+ 4);
17610 /* Data for make_branch_to_a8_stub(). */
17612 struct a8_branch_to_stub_data
17614 asection
*writing_section
;
17615 bfd_byte
*contents
;
17619 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
17620 places for a particular section. */
17623 make_branch_to_a8_stub (struct bfd_hash_entry
*gen_entry
,
17626 struct elf32_arm_stub_hash_entry
*stub_entry
;
17627 struct a8_branch_to_stub_data
*data
;
17628 bfd_byte
*contents
;
17629 unsigned long branch_insn
;
17630 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
17631 bfd_signed_vma branch_offset
;
17635 stub_entry
= (struct elf32_arm_stub_hash_entry
*) gen_entry
;
17636 data
= (struct a8_branch_to_stub_data
*) in_arg
;
17638 if (stub_entry
->target_section
!= data
->writing_section
17639 || stub_entry
->stub_type
< arm_stub_a8_veneer_lwm
)
17642 contents
= data
->contents
;
17644 /* We use target_section as Cortex-A8 erratum workaround stubs are only
17645 generated when both source and target are in the same section. */
17646 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
17647 + stub_entry
->target_section
->output_offset
17648 + stub_entry
->source_value
;
17650 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
17651 + stub_entry
->stub_sec
->output_offset
17652 + stub_entry
->stub_offset
;
17654 if (stub_entry
->stub_type
== arm_stub_a8_veneer_blx
)
17655 veneered_insn_loc
&= ~3u;
17657 branch_offset
= veneer_entry_loc
- veneered_insn_loc
- 4;
17659 abfd
= stub_entry
->target_section
->owner
;
17660 loc
= stub_entry
->source_value
;
17662 /* We attempt to avoid this condition by setting stubs_always_after_branch
17663 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
17664 This check is just to be on the safe side... */
17665 if ((veneered_insn_loc
& ~0xfff) == (veneer_entry_loc
& ~0xfff))
17667 _bfd_error_handler (_("%B: error: Cortex-A8 erratum stub is "
17668 "allocated in unsafe location"), abfd
);
17672 switch (stub_entry
->stub_type
)
17674 case arm_stub_a8_veneer_b
:
17675 case arm_stub_a8_veneer_b_cond
:
17676 branch_insn
= 0xf0009000;
17679 case arm_stub_a8_veneer_blx
:
17680 branch_insn
= 0xf000e800;
17683 case arm_stub_a8_veneer_bl
:
17685 unsigned int i1
, j1
, i2
, j2
, s
;
17687 branch_insn
= 0xf000d000;
17690 if (branch_offset
< -16777216 || branch_offset
> 16777214)
17692 /* There's not much we can do apart from complain if this
17694 _bfd_error_handler (_("%B: error: Cortex-A8 erratum stub out "
17695 "of range (input file too large)"), abfd
);
17699 /* i1 = not(j1 eor s), so:
17701 j1 = (not i1) eor s. */
17703 branch_insn
|= (branch_offset
>> 1) & 0x7ff;
17704 branch_insn
|= ((branch_offset
>> 12) & 0x3ff) << 16;
17705 i2
= (branch_offset
>> 22) & 1;
17706 i1
= (branch_offset
>> 23) & 1;
17707 s
= (branch_offset
>> 24) & 1;
17710 branch_insn
|= j2
<< 11;
17711 branch_insn
|= j1
<< 13;
17712 branch_insn
|= s
<< 26;
17721 bfd_put_16 (abfd
, (branch_insn
>> 16) & 0xffff, &contents
[loc
]);
17722 bfd_put_16 (abfd
, branch_insn
& 0xffff, &contents
[loc
+ 2]);
17727 /* Beginning of stm32l4xx work-around. */
17729 /* Functions encoding instructions necessary for the emission of the
17730 fix-stm32l4xx-629360.
17731 Encoding is extracted from the
17732 ARM (C) Architecture Reference Manual
17733 ARMv7-A and ARMv7-R edition
17734 ARM DDI 0406C.b (ID072512). */
17736 static inline bfd_vma
17737 create_instruction_branch_absolute (int branch_offset
)
17739 /* A8.8.18 B (A8-334)
17740 B target_address (Encoding T4). */
17741 /* 1111 - 0Sii - iiii - iiii - 10J1 - Jiii - iiii - iiii. */
17742 /* jump offset is: S:I1:I2:imm10:imm11:0. */
17743 /* with : I1 = NOT (J1 EOR S) I2 = NOT (J2 EOR S). */
17745 int s
= ((branch_offset
& 0x1000000) >> 24);
17746 int j1
= s
^ !((branch_offset
& 0x800000) >> 23);
17747 int j2
= s
^ !((branch_offset
& 0x400000) >> 22);
17749 if (branch_offset
< -(1 << 24) || branch_offset
>= (1 << 24))
17750 BFD_ASSERT (0 && "Error: branch out of range. Cannot create branch.");
17752 bfd_vma patched_inst
= 0xf0009000
17754 | (((unsigned long) (branch_offset
) >> 12) & 0x3ff) << 16 /* imm10. */
17755 | j1
<< 13 /* J1. */
17756 | j2
<< 11 /* J2. */
17757 | (((unsigned long) (branch_offset
) >> 1) & 0x7ff); /* imm11. */
17759 return patched_inst
;
17762 static inline bfd_vma
17763 create_instruction_ldmia (int base_reg
, int wback
, int reg_mask
)
17765 /* A8.8.57 LDM/LDMIA/LDMFD (A8-396)
17766 LDMIA Rn!, {Ra, Rb, Rc, ...} (Encoding T2). */
17767 bfd_vma patched_inst
= 0xe8900000
17768 | (/*W=*/wback
<< 21)
17770 | (reg_mask
& 0x0000ffff);
17772 return patched_inst
;
17775 static inline bfd_vma
17776 create_instruction_ldmdb (int base_reg
, int wback
, int reg_mask
)
17778 /* A8.8.60 LDMDB/LDMEA (A8-402)
17779 LDMDB Rn!, {Ra, Rb, Rc, ...} (Encoding T1). */
17780 bfd_vma patched_inst
= 0xe9100000
17781 | (/*W=*/wback
<< 21)
17783 | (reg_mask
& 0x0000ffff);
17785 return patched_inst
;
17788 static inline bfd_vma
17789 create_instruction_mov (int target_reg
, int source_reg
)
17791 /* A8.8.103 MOV (register) (A8-486)
17792 MOV Rd, Rm (Encoding T1). */
17793 bfd_vma patched_inst
= 0x4600
17794 | (target_reg
& 0x7)
17795 | ((target_reg
& 0x8) >> 3) << 7
17796 | (source_reg
<< 3);
17798 return patched_inst
;
17801 static inline bfd_vma
17802 create_instruction_sub (int target_reg
, int source_reg
, int value
)
17804 /* A8.8.221 SUB (immediate) (A8-708)
17805 SUB Rd, Rn, #value (Encoding T3). */
17806 bfd_vma patched_inst
= 0xf1a00000
17807 | (target_reg
<< 8)
17808 | (source_reg
<< 16)
17810 | ((value
& 0x800) >> 11) << 26
17811 | ((value
& 0x700) >> 8) << 12
17814 return patched_inst
;
17817 static inline bfd_vma
17818 create_instruction_vldmia (int base_reg
, int is_dp
, int wback
, int num_words
,
17821 /* A8.8.332 VLDM (A8-922)
17822 VLMD{MODE} Rn{!}, {list} (Encoding T1 or T2). */
17823 bfd_vma patched_inst
= (is_dp
? 0xec900b00 : 0xec900a00)
17824 | (/*W=*/wback
<< 21)
17826 | (num_words
& 0x000000ff)
17827 | (((unsigned)first_reg
>> 1) & 0x0000000f) << 12
17828 | (first_reg
& 0x00000001) << 22;
17830 return patched_inst
;
17833 static inline bfd_vma
17834 create_instruction_vldmdb (int base_reg
, int is_dp
, int num_words
,
17837 /* A8.8.332 VLDM (A8-922)
17838 VLMD{MODE} Rn!, {} (Encoding T1 or T2). */
17839 bfd_vma patched_inst
= (is_dp
? 0xed300b00 : 0xed300a00)
17841 | (num_words
& 0x000000ff)
17842 | (((unsigned)first_reg
>>1 ) & 0x0000000f) << 12
17843 | (first_reg
& 0x00000001) << 22;
17845 return patched_inst
;
17848 static inline bfd_vma
17849 create_instruction_udf_w (int value
)
17851 /* A8.8.247 UDF (A8-758)
17852 Undefined (Encoding T2). */
17853 bfd_vma patched_inst
= 0xf7f0a000
17854 | (value
& 0x00000fff)
17855 | (value
& 0x000f0000) << 16;
17857 return patched_inst
;
17860 static inline bfd_vma
17861 create_instruction_udf (int value
)
17863 /* A8.8.247 UDF (A8-758)
17864 Undefined (Encoding T1). */
17865 bfd_vma patched_inst
= 0xde00
17868 return patched_inst
;
17871 /* Functions writing an instruction in memory, returning the next
17872 memory position to write to. */
17874 static inline bfd_byte
*
17875 push_thumb2_insn32 (struct elf32_arm_link_hash_table
* htab
,
17876 bfd
* output_bfd
, bfd_byte
*pt
, insn32 insn
)
17878 put_thumb2_insn (htab
, output_bfd
, insn
, pt
);
17882 static inline bfd_byte
*
17883 push_thumb2_insn16 (struct elf32_arm_link_hash_table
* htab
,
17884 bfd
* output_bfd
, bfd_byte
*pt
, insn32 insn
)
17886 put_thumb_insn (htab
, output_bfd
, insn
, pt
);
17890 /* Function filling up a region in memory with T1 and T2 UDFs taking
17891 care of alignment. */
17894 stm32l4xx_fill_stub_udf (struct elf32_arm_link_hash_table
* htab
,
17896 const bfd_byte
* const base_stub_contents
,
17897 bfd_byte
* const from_stub_contents
,
17898 const bfd_byte
* const end_stub_contents
)
17900 bfd_byte
*current_stub_contents
= from_stub_contents
;
17902 /* Fill the remaining of the stub with deterministic contents : UDF
17904 Check if realignment is needed on modulo 4 frontier using T1, to
17906 if ((current_stub_contents
< end_stub_contents
)
17907 && !((current_stub_contents
- base_stub_contents
) % 2)
17908 && ((current_stub_contents
- base_stub_contents
) % 4))
17909 current_stub_contents
=
17910 push_thumb2_insn16 (htab
, output_bfd
, current_stub_contents
,
17911 create_instruction_udf (0));
17913 for (; current_stub_contents
< end_stub_contents
;)
17914 current_stub_contents
=
17915 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
17916 create_instruction_udf_w (0));
17918 return current_stub_contents
;
17921 /* Functions writing the stream of instructions equivalent to the
17922 derived sequence for ldmia, ldmdb, vldm respectively. */
17925 stm32l4xx_create_replacing_stub_ldmia (struct elf32_arm_link_hash_table
* htab
,
17927 const insn32 initial_insn
,
17928 const bfd_byte
*const initial_insn_addr
,
17929 bfd_byte
*const base_stub_contents
)
17931 int wback
= (initial_insn
& 0x00200000) >> 21;
17932 int ri
, rn
= (initial_insn
& 0x000F0000) >> 16;
17933 int insn_all_registers
= initial_insn
& 0x0000ffff;
17934 int insn_low_registers
, insn_high_registers
;
17935 int usable_register_mask
;
17936 int nb_registers
= elf32_arm_popcount (insn_all_registers
);
17937 int restore_pc
= (insn_all_registers
& (1 << 15)) ? 1 : 0;
17938 int restore_rn
= (insn_all_registers
& (1 << rn
)) ? 1 : 0;
17939 bfd_byte
*current_stub_contents
= base_stub_contents
;
17941 BFD_ASSERT (is_thumb2_ldmia (initial_insn
));
17943 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
17944 smaller than 8 registers load sequences that do not cause the
17946 if (nb_registers
<= 8)
17948 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
17949 current_stub_contents
=
17950 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
17953 /* B initial_insn_addr+4. */
17955 current_stub_contents
=
17956 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
17957 create_instruction_branch_absolute
17958 (initial_insn_addr
- current_stub_contents
));
17960 /* Fill the remaining of the stub with deterministic contents. */
17961 current_stub_contents
=
17962 stm32l4xx_fill_stub_udf (htab
, output_bfd
,
17963 base_stub_contents
, current_stub_contents
,
17964 base_stub_contents
+
17965 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
);
17970 /* - reg_list[13] == 0. */
17971 BFD_ASSERT ((insn_all_registers
& (1 << 13))==0);
17973 /* - reg_list[14] & reg_list[15] != 1. */
17974 BFD_ASSERT ((insn_all_registers
& 0xC000) != 0xC000);
17976 /* - if (wback==1) reg_list[rn] == 0. */
17977 BFD_ASSERT (!wback
|| !restore_rn
);
17979 /* - nb_registers > 8. */
17980 BFD_ASSERT (elf32_arm_popcount (insn_all_registers
) > 8);
17982 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
17984 /* In the following algorithm, we split this wide LDM using 2 LDM insns:
17985 - One with the 7 lowest registers (register mask 0x007F)
17986 This LDM will finally contain between 2 and 7 registers
17987 - One with the 7 highest registers (register mask 0xDF80)
17988 This ldm will finally contain between 2 and 7 registers. */
17989 insn_low_registers
= insn_all_registers
& 0x007F;
17990 insn_high_registers
= insn_all_registers
& 0xDF80;
17992 /* A spare register may be needed during this veneer to temporarily
17993 handle the base register. This register will be restored with the
17994 last LDM operation.
17995 The usable register may be any general purpose register (that
17996 excludes PC, SP, LR : register mask is 0x1FFF). */
17997 usable_register_mask
= 0x1FFF;
17999 /* Generate the stub function. */
18002 /* LDMIA Rn!, {R-low-register-list} : (Encoding T2). */
18003 current_stub_contents
=
18004 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18005 create_instruction_ldmia
18006 (rn
, /*wback=*/1, insn_low_registers
));
18008 /* LDMIA Rn!, {R-high-register-list} : (Encoding T2). */
18009 current_stub_contents
=
18010 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18011 create_instruction_ldmia
18012 (rn
, /*wback=*/1, insn_high_registers
));
18015 /* B initial_insn_addr+4. */
18016 current_stub_contents
=
18017 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18018 create_instruction_branch_absolute
18019 (initial_insn_addr
- current_stub_contents
));
18022 else /* if (!wback). */
18026 /* If Rn is not part of the high-register-list, move it there. */
18027 if (!(insn_high_registers
& (1 << rn
)))
18029 /* Choose a Ri in the high-register-list that will be restored. */
18030 ri
= ctz (insn_high_registers
& usable_register_mask
& ~(1 << rn
));
18033 current_stub_contents
=
18034 push_thumb2_insn16 (htab
, output_bfd
, current_stub_contents
,
18035 create_instruction_mov (ri
, rn
));
18038 /* LDMIA Ri!, {R-low-register-list} : (Encoding T2). */
18039 current_stub_contents
=
18040 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18041 create_instruction_ldmia
18042 (ri
, /*wback=*/1, insn_low_registers
));
18044 /* LDMIA Ri, {R-high-register-list} : (Encoding T2). */
18045 current_stub_contents
=
18046 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18047 create_instruction_ldmia
18048 (ri
, /*wback=*/0, insn_high_registers
));
18052 /* B initial_insn_addr+4. */
18053 current_stub_contents
=
18054 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18055 create_instruction_branch_absolute
18056 (initial_insn_addr
- current_stub_contents
));
18060 /* Fill the remaining of the stub with deterministic contents. */
18061 current_stub_contents
=
18062 stm32l4xx_fill_stub_udf (htab
, output_bfd
,
18063 base_stub_contents
, current_stub_contents
,
18064 base_stub_contents
+
18065 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
);
18069 stm32l4xx_create_replacing_stub_ldmdb (struct elf32_arm_link_hash_table
* htab
,
18071 const insn32 initial_insn
,
18072 const bfd_byte
*const initial_insn_addr
,
18073 bfd_byte
*const base_stub_contents
)
18075 int wback
= (initial_insn
& 0x00200000) >> 21;
18076 int ri
, rn
= (initial_insn
& 0x000f0000) >> 16;
18077 int insn_all_registers
= initial_insn
& 0x0000ffff;
18078 int insn_low_registers
, insn_high_registers
;
18079 int usable_register_mask
;
18080 int restore_pc
= (insn_all_registers
& (1 << 15)) ? 1 : 0;
18081 int restore_rn
= (insn_all_registers
& (1 << rn
)) ? 1 : 0;
18082 int nb_registers
= elf32_arm_popcount (insn_all_registers
);
18083 bfd_byte
*current_stub_contents
= base_stub_contents
;
18085 BFD_ASSERT (is_thumb2_ldmdb (initial_insn
));
18087 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
18088 smaller than 8 registers load sequences that do not cause the
18090 if (nb_registers
<= 8)
18092 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
18093 current_stub_contents
=
18094 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18097 /* B initial_insn_addr+4. */
18098 current_stub_contents
=
18099 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18100 create_instruction_branch_absolute
18101 (initial_insn_addr
- current_stub_contents
));
18103 /* Fill the remaining of the stub with deterministic contents. */
18104 current_stub_contents
=
18105 stm32l4xx_fill_stub_udf (htab
, output_bfd
,
18106 base_stub_contents
, current_stub_contents
,
18107 base_stub_contents
+
18108 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
);
18113 /* - reg_list[13] == 0. */
18114 BFD_ASSERT ((insn_all_registers
& (1 << 13)) == 0);
18116 /* - reg_list[14] & reg_list[15] != 1. */
18117 BFD_ASSERT ((insn_all_registers
& 0xC000) != 0xC000);
18119 /* - if (wback==1) reg_list[rn] == 0. */
18120 BFD_ASSERT (!wback
|| !restore_rn
);
18122 /* - nb_registers > 8. */
18123 BFD_ASSERT (elf32_arm_popcount (insn_all_registers
) > 8);
18125 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
18127 /* In the following algorithm, we split this wide LDM using 2 LDM insn:
18128 - One with the 7 lowest registers (register mask 0x007F)
18129 This LDM will finally contain between 2 and 7 registers
18130 - One with the 7 highest registers (register mask 0xDF80)
18131 This ldm will finally contain between 2 and 7 registers. */
18132 insn_low_registers
= insn_all_registers
& 0x007F;
18133 insn_high_registers
= insn_all_registers
& 0xDF80;
18135 /* A spare register may be needed during this veneer to temporarily
18136 handle the base register. This register will be restored with
18137 the last LDM operation.
18138 The usable register may be any general purpose register (that excludes
18139 PC, SP, LR : register mask is 0x1FFF). */
18140 usable_register_mask
= 0x1FFF;
18142 /* Generate the stub function. */
18143 if (!wback
&& !restore_pc
&& !restore_rn
)
18145 /* Choose a Ri in the low-register-list that will be restored. */
18146 ri
= ctz (insn_low_registers
& usable_register_mask
& ~(1 << rn
));
18149 current_stub_contents
=
18150 push_thumb2_insn16 (htab
, output_bfd
, current_stub_contents
,
18151 create_instruction_mov (ri
, rn
));
18153 /* LDMDB Ri!, {R-high-register-list}. */
18154 current_stub_contents
=
18155 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18156 create_instruction_ldmdb
18157 (ri
, /*wback=*/1, insn_high_registers
));
18159 /* LDMDB Ri, {R-low-register-list}. */
18160 current_stub_contents
=
18161 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18162 create_instruction_ldmdb
18163 (ri
, /*wback=*/0, insn_low_registers
));
18165 /* B initial_insn_addr+4. */
18166 current_stub_contents
=
18167 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18168 create_instruction_branch_absolute
18169 (initial_insn_addr
- current_stub_contents
));
18171 else if (wback
&& !restore_pc
&& !restore_rn
)
18173 /* LDMDB Rn!, {R-high-register-list}. */
18174 current_stub_contents
=
18175 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18176 create_instruction_ldmdb
18177 (rn
, /*wback=*/1, insn_high_registers
));
18179 /* LDMDB Rn!, {R-low-register-list}. */
18180 current_stub_contents
=
18181 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18182 create_instruction_ldmdb
18183 (rn
, /*wback=*/1, insn_low_registers
));
18185 /* B initial_insn_addr+4. */
18186 current_stub_contents
=
18187 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18188 create_instruction_branch_absolute
18189 (initial_insn_addr
- current_stub_contents
));
18191 else if (!wback
&& restore_pc
&& !restore_rn
)
18193 /* Choose a Ri in the high-register-list that will be restored. */
18194 ri
= ctz (insn_high_registers
& usable_register_mask
& ~(1 << rn
));
18196 /* SUB Ri, Rn, #(4*nb_registers). */
18197 current_stub_contents
=
18198 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18199 create_instruction_sub (ri
, rn
, (4 * nb_registers
)));
18201 /* LDMIA Ri!, {R-low-register-list}. */
18202 current_stub_contents
=
18203 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18204 create_instruction_ldmia
18205 (ri
, /*wback=*/1, insn_low_registers
));
18207 /* LDMIA Ri, {R-high-register-list}. */
18208 current_stub_contents
=
18209 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18210 create_instruction_ldmia
18211 (ri
, /*wback=*/0, insn_high_registers
));
18213 else if (wback
&& restore_pc
&& !restore_rn
)
18215 /* Choose a Ri in the high-register-list that will be restored. */
18216 ri
= ctz (insn_high_registers
& usable_register_mask
& ~(1 << rn
));
18218 /* SUB Rn, Rn, #(4*nb_registers) */
18219 current_stub_contents
=
18220 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18221 create_instruction_sub (rn
, rn
, (4 * nb_registers
)));
18224 current_stub_contents
=
18225 push_thumb2_insn16 (htab
, output_bfd
, current_stub_contents
,
18226 create_instruction_mov (ri
, rn
));
18228 /* LDMIA Ri!, {R-low-register-list}. */
18229 current_stub_contents
=
18230 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18231 create_instruction_ldmia
18232 (ri
, /*wback=*/1, insn_low_registers
));
18234 /* LDMIA Ri, {R-high-register-list}. */
18235 current_stub_contents
=
18236 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18237 create_instruction_ldmia
18238 (ri
, /*wback=*/0, insn_high_registers
));
18240 else if (!wback
&& !restore_pc
&& restore_rn
)
18243 if (!(insn_low_registers
& (1 << rn
)))
18245 /* Choose a Ri in the low-register-list that will be restored. */
18246 ri
= ctz (insn_low_registers
& usable_register_mask
& ~(1 << rn
));
18249 current_stub_contents
=
18250 push_thumb2_insn16 (htab
, output_bfd
, current_stub_contents
,
18251 create_instruction_mov (ri
, rn
));
18254 /* LDMDB Ri!, {R-high-register-list}. */
18255 current_stub_contents
=
18256 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18257 create_instruction_ldmdb
18258 (ri
, /*wback=*/1, insn_high_registers
));
18260 /* LDMDB Ri, {R-low-register-list}. */
18261 current_stub_contents
=
18262 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18263 create_instruction_ldmdb
18264 (ri
, /*wback=*/0, insn_low_registers
));
18266 /* B initial_insn_addr+4. */
18267 current_stub_contents
=
18268 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18269 create_instruction_branch_absolute
18270 (initial_insn_addr
- current_stub_contents
));
18272 else if (!wback
&& restore_pc
&& restore_rn
)
18275 if (!(insn_high_registers
& (1 << rn
)))
18277 /* Choose a Ri in the high-register-list that will be restored. */
18278 ri
= ctz (insn_high_registers
& usable_register_mask
& ~(1 << rn
));
18281 /* SUB Ri, Rn, #(4*nb_registers). */
18282 current_stub_contents
=
18283 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18284 create_instruction_sub (ri
, rn
, (4 * nb_registers
)));
18286 /* LDMIA Ri!, {R-low-register-list}. */
18287 current_stub_contents
=
18288 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18289 create_instruction_ldmia
18290 (ri
, /*wback=*/1, insn_low_registers
));
18292 /* LDMIA Ri, {R-high-register-list}. */
18293 current_stub_contents
=
18294 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18295 create_instruction_ldmia
18296 (ri
, /*wback=*/0, insn_high_registers
));
18298 else if (wback
&& restore_rn
)
18300 /* The assembler should not have accepted to encode this. */
18301 BFD_ASSERT (0 && "Cannot patch an instruction that has an "
18302 "undefined behavior.\n");
18305 /* Fill the remaining of the stub with deterministic contents. */
18306 current_stub_contents
=
18307 stm32l4xx_fill_stub_udf (htab
, output_bfd
,
18308 base_stub_contents
, current_stub_contents
,
18309 base_stub_contents
+
18310 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
);
18315 stm32l4xx_create_replacing_stub_vldm (struct elf32_arm_link_hash_table
* htab
,
18317 const insn32 initial_insn
,
18318 const bfd_byte
*const initial_insn_addr
,
18319 bfd_byte
*const base_stub_contents
)
18321 int num_words
= ((unsigned int) initial_insn
<< 24) >> 24;
18322 bfd_byte
*current_stub_contents
= base_stub_contents
;
18324 BFD_ASSERT (is_thumb2_vldm (initial_insn
));
18326 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
18327 smaller than 8 words load sequences that do not cause the
18329 if (num_words
<= 8)
18331 /* Untouched instruction. */
18332 current_stub_contents
=
18333 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18336 /* B initial_insn_addr+4. */
18337 current_stub_contents
=
18338 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18339 create_instruction_branch_absolute
18340 (initial_insn_addr
- current_stub_contents
));
18344 bfd_boolean is_dp
= /* DP encoding. */
18345 (initial_insn
& 0xfe100f00) == 0xec100b00;
18346 bfd_boolean is_ia_nobang
= /* (IA without !). */
18347 (((initial_insn
<< 7) >> 28) & 0xd) == 0x4;
18348 bfd_boolean is_ia_bang
= /* (IA with !) - includes VPOP. */
18349 (((initial_insn
<< 7) >> 28) & 0xd) == 0x5;
18350 bfd_boolean is_db_bang
= /* (DB with !). */
18351 (((initial_insn
<< 7) >> 28) & 0xd) == 0x9;
18352 int base_reg
= ((unsigned int) initial_insn
<< 12) >> 28;
18353 /* d = UInt (Vd:D);. */
18354 int first_reg
= ((((unsigned int) initial_insn
<< 16) >> 28) << 1)
18355 | (((unsigned int)initial_insn
<< 9) >> 31);
18357 /* Compute the number of 8-words chunks needed to split. */
18358 int chunks
= (num_words
% 8) ? (num_words
/ 8 + 1) : (num_words
/ 8);
18361 /* The test coverage has been done assuming the following
18362 hypothesis that exactly one of the previous is_ predicates is
18364 BFD_ASSERT ( (is_ia_nobang
^ is_ia_bang
^ is_db_bang
)
18365 && !(is_ia_nobang
& is_ia_bang
& is_db_bang
));
18367 /* We treat the cutting of the words in one pass for all
18368 cases, then we emit the adjustments:
18371 -> vldm rx!, {8_words_or_less} for each needed 8_word
18372 -> sub rx, rx, #size (list)
18375 -> vldm rx!, {8_words_or_less} for each needed 8_word
18376 This also handles vpop instruction (when rx is sp)
18379 -> vldmb rx!, {8_words_or_less} for each needed 8_word. */
18380 for (chunk
= 0; chunk
< chunks
; ++chunk
)
18382 bfd_vma new_insn
= 0;
18384 if (is_ia_nobang
|| is_ia_bang
)
18386 new_insn
= create_instruction_vldmia
18390 chunks
- (chunk
+ 1) ?
18391 8 : num_words
- chunk
* 8,
18392 first_reg
+ chunk
* 8);
18394 else if (is_db_bang
)
18396 new_insn
= create_instruction_vldmdb
18399 chunks
- (chunk
+ 1) ?
18400 8 : num_words
- chunk
* 8,
18401 first_reg
+ chunk
* 8);
18405 current_stub_contents
=
18406 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18410 /* Only this case requires the base register compensation
18414 current_stub_contents
=
18415 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18416 create_instruction_sub
18417 (base_reg
, base_reg
, 4*num_words
));
18420 /* B initial_insn_addr+4. */
18421 current_stub_contents
=
18422 push_thumb2_insn32 (htab
, output_bfd
, current_stub_contents
,
18423 create_instruction_branch_absolute
18424 (initial_insn_addr
- current_stub_contents
));
18427 /* Fill the remaining of the stub with deterministic contents. */
18428 current_stub_contents
=
18429 stm32l4xx_fill_stub_udf (htab
, output_bfd
,
18430 base_stub_contents
, current_stub_contents
,
18431 base_stub_contents
+
18432 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE
);
18436 stm32l4xx_create_replacing_stub (struct elf32_arm_link_hash_table
* htab
,
18438 const insn32 wrong_insn
,
18439 const bfd_byte
*const wrong_insn_addr
,
18440 bfd_byte
*const stub_contents
)
18442 if (is_thumb2_ldmia (wrong_insn
))
18443 stm32l4xx_create_replacing_stub_ldmia (htab
, output_bfd
,
18444 wrong_insn
, wrong_insn_addr
,
18446 else if (is_thumb2_ldmdb (wrong_insn
))
18447 stm32l4xx_create_replacing_stub_ldmdb (htab
, output_bfd
,
18448 wrong_insn
, wrong_insn_addr
,
18450 else if (is_thumb2_vldm (wrong_insn
))
18451 stm32l4xx_create_replacing_stub_vldm (htab
, output_bfd
,
18452 wrong_insn
, wrong_insn_addr
,
18456 /* End of stm32l4xx work-around. */
18459 /* Do code byteswapping. Return FALSE afterwards so that the section is
18460 written out as normal. */
18463 elf32_arm_write_section (bfd
*output_bfd
,
18464 struct bfd_link_info
*link_info
,
18466 bfd_byte
*contents
)
18468 unsigned int mapcount
, errcount
;
18469 _arm_elf_section_data
*arm_data
;
18470 struct elf32_arm_link_hash_table
*globals
= elf32_arm_hash_table (link_info
);
18471 elf32_arm_section_map
*map
;
18472 elf32_vfp11_erratum_list
*errnode
;
18473 elf32_stm32l4xx_erratum_list
*stm32l4xx_errnode
;
18476 bfd_vma offset
= sec
->output_section
->vma
+ sec
->output_offset
;
18480 if (globals
== NULL
)
18483 /* If this section has not been allocated an _arm_elf_section_data
18484 structure then we cannot record anything. */
18485 arm_data
= get_arm_elf_section_data (sec
);
18486 if (arm_data
== NULL
)
18489 mapcount
= arm_data
->mapcount
;
18490 map
= arm_data
->map
;
18491 errcount
= arm_data
->erratumcount
;
18495 unsigned int endianflip
= bfd_big_endian (output_bfd
) ? 3 : 0;
18497 for (errnode
= arm_data
->erratumlist
; errnode
!= 0;
18498 errnode
= errnode
->next
)
18500 bfd_vma target
= errnode
->vma
- offset
;
18502 switch (errnode
->type
)
18504 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER
:
18506 bfd_vma branch_to_veneer
;
18507 /* Original condition code of instruction, plus bit mask for
18508 ARM B instruction. */
18509 unsigned int insn
= (errnode
->u
.b
.vfp_insn
& 0xf0000000)
18512 /* The instruction is before the label. */
18515 /* Above offset included in -4 below. */
18516 branch_to_veneer
= errnode
->u
.b
.veneer
->vma
18517 - errnode
->vma
- 4;
18519 if ((signed) branch_to_veneer
< -(1 << 25)
18520 || (signed) branch_to_veneer
>= (1 << 25))
18521 _bfd_error_handler (_("%B: error: VFP11 veneer out of "
18522 "range"), output_bfd
);
18524 insn
|= (branch_to_veneer
>> 2) & 0xffffff;
18525 contents
[endianflip
^ target
] = insn
& 0xff;
18526 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
18527 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
18528 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
18532 case VFP11_ERRATUM_ARM_VENEER
:
18534 bfd_vma branch_from_veneer
;
18537 /* Take size of veneer into account. */
18538 branch_from_veneer
= errnode
->u
.v
.branch
->vma
18539 - errnode
->vma
- 12;
18541 if ((signed) branch_from_veneer
< -(1 << 25)
18542 || (signed) branch_from_veneer
>= (1 << 25))
18543 _bfd_error_handler (_("%B: error: VFP11 veneer out of "
18544 "range"), output_bfd
);
18546 /* Original instruction. */
18547 insn
= errnode
->u
.v
.branch
->u
.b
.vfp_insn
;
18548 contents
[endianflip
^ target
] = insn
& 0xff;
18549 contents
[endianflip
^ (target
+ 1)] = (insn
>> 8) & 0xff;
18550 contents
[endianflip
^ (target
+ 2)] = (insn
>> 16) & 0xff;
18551 contents
[endianflip
^ (target
+ 3)] = (insn
>> 24) & 0xff;
18553 /* Branch back to insn after original insn. */
18554 insn
= 0xea000000 | ((branch_from_veneer
>> 2) & 0xffffff);
18555 contents
[endianflip
^ (target
+ 4)] = insn
& 0xff;
18556 contents
[endianflip
^ (target
+ 5)] = (insn
>> 8) & 0xff;
18557 contents
[endianflip
^ (target
+ 6)] = (insn
>> 16) & 0xff;
18558 contents
[endianflip
^ (target
+ 7)] = (insn
>> 24) & 0xff;
18568 if (arm_data
->stm32l4xx_erratumcount
!= 0)
18570 for (stm32l4xx_errnode
= arm_data
->stm32l4xx_erratumlist
;
18571 stm32l4xx_errnode
!= 0;
18572 stm32l4xx_errnode
= stm32l4xx_errnode
->next
)
18574 bfd_vma target
= stm32l4xx_errnode
->vma
- offset
;
18576 switch (stm32l4xx_errnode
->type
)
18578 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER
:
18581 bfd_vma branch_to_veneer
=
18582 stm32l4xx_errnode
->u
.b
.veneer
->vma
- stm32l4xx_errnode
->vma
;
18584 if ((signed) branch_to_veneer
< -(1 << 24)
18585 || (signed) branch_to_veneer
>= (1 << 24))
18587 bfd_vma out_of_range
=
18588 ((signed) branch_to_veneer
< -(1 << 24)) ?
18589 - branch_to_veneer
- (1 << 24) :
18590 ((signed) branch_to_veneer
>= (1 << 24)) ?
18591 branch_to_veneer
- (1 << 24) : 0;
18594 (_("%B(%#Lx): error: Cannot create STM32L4XX veneer. "
18595 "Jump out of range by %Ld bytes. "
18596 "Cannot encode branch instruction. "),
18598 stm32l4xx_errnode
->vma
- 4,
18603 insn
= create_instruction_branch_absolute
18604 (stm32l4xx_errnode
->u
.b
.veneer
->vma
- stm32l4xx_errnode
->vma
);
18606 /* The instruction is before the label. */
18609 put_thumb2_insn (globals
, output_bfd
,
18610 (bfd_vma
) insn
, contents
+ target
);
18614 case STM32L4XX_ERRATUM_VENEER
:
18617 bfd_byte
* veneer_r
;
18620 veneer
= contents
+ target
;
18622 + stm32l4xx_errnode
->u
.b
.veneer
->vma
18623 - stm32l4xx_errnode
->vma
- 4;
18625 if ((signed) (veneer_r
- veneer
-
18626 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE
>
18627 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
?
18628 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE
:
18629 STM32L4XX_ERRATUM_LDM_VENEER_SIZE
) < -(1 << 24)
18630 || (signed) (veneer_r
- veneer
) >= (1 << 24))
18632 _bfd_error_handler (_("%B: error: Cannot create STM32L4XX "
18633 "veneer."), output_bfd
);
18637 /* Original instruction. */
18638 insn
= stm32l4xx_errnode
->u
.v
.branch
->u
.b
.insn
;
18640 stm32l4xx_create_replacing_stub
18641 (globals
, output_bfd
, insn
, (void*)veneer_r
, (void*)veneer
);
18651 if (arm_data
->elf
.this_hdr
.sh_type
== SHT_ARM_EXIDX
)
18653 arm_unwind_table_edit
*edit_node
18654 = arm_data
->u
.exidx
.unwind_edit_list
;
18655 /* Now, sec->size is the size of the section we will write. The original
18656 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
18657 markers) was sec->rawsize. (This isn't the case if we perform no
18658 edits, then rawsize will be zero and we should use size). */
18659 bfd_byte
*edited_contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
18660 unsigned int input_size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
18661 unsigned int in_index
, out_index
;
18662 bfd_vma add_to_offsets
= 0;
18664 for (in_index
= 0, out_index
= 0; in_index
* 8 < input_size
|| edit_node
;)
18668 unsigned int edit_index
= edit_node
->index
;
18670 if (in_index
< edit_index
&& in_index
* 8 < input_size
)
18672 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
18673 contents
+ in_index
* 8, add_to_offsets
);
18677 else if (in_index
== edit_index
18678 || (in_index
* 8 >= input_size
18679 && edit_index
== UINT_MAX
))
18681 switch (edit_node
->type
)
18683 case DELETE_EXIDX_ENTRY
:
18685 add_to_offsets
+= 8;
18688 case INSERT_EXIDX_CANTUNWIND_AT_END
:
18690 asection
*text_sec
= edit_node
->linked_section
;
18691 bfd_vma text_offset
= text_sec
->output_section
->vma
18692 + text_sec
->output_offset
18694 bfd_vma exidx_offset
= offset
+ out_index
* 8;
18695 unsigned long prel31_offset
;
18697 /* Note: this is meant to be equivalent to an
18698 R_ARM_PREL31 relocation. These synthetic
18699 EXIDX_CANTUNWIND markers are not relocated by the
18700 usual BFD method. */
18701 prel31_offset
= (text_offset
- exidx_offset
)
18703 if (bfd_link_relocatable (link_info
))
18705 /* Here relocation for new EXIDX_CANTUNWIND is
18706 created, so there is no need to
18707 adjust offset by hand. */
18708 prel31_offset
= text_sec
->output_offset
18712 /* First address we can't unwind. */
18713 bfd_put_32 (output_bfd
, prel31_offset
,
18714 &edited_contents
[out_index
* 8]);
18716 /* Code for EXIDX_CANTUNWIND. */
18717 bfd_put_32 (output_bfd
, 0x1,
18718 &edited_contents
[out_index
* 8 + 4]);
18721 add_to_offsets
-= 8;
18726 edit_node
= edit_node
->next
;
18731 /* No more edits, copy remaining entries verbatim. */
18732 copy_exidx_entry (output_bfd
, edited_contents
+ out_index
* 8,
18733 contents
+ in_index
* 8, add_to_offsets
);
18739 if (!(sec
->flags
& SEC_EXCLUDE
) && !(sec
->flags
& SEC_NEVER_LOAD
))
18740 bfd_set_section_contents (output_bfd
, sec
->output_section
,
18742 (file_ptr
) sec
->output_offset
, sec
->size
);
18747 /* Fix code to point to Cortex-A8 erratum stubs. */
18748 if (globals
->fix_cortex_a8
)
18750 struct a8_branch_to_stub_data data
;
18752 data
.writing_section
= sec
;
18753 data
.contents
= contents
;
18755 bfd_hash_traverse (& globals
->stub_hash_table
, make_branch_to_a8_stub
,
18762 if (globals
->byteswap_code
)
18764 qsort (map
, mapcount
, sizeof (* map
), elf32_arm_compare_mapping
);
18767 for (i
= 0; i
< mapcount
; i
++)
18769 if (i
== mapcount
- 1)
18772 end
= map
[i
+ 1].vma
;
18774 switch (map
[i
].type
)
18777 /* Byte swap code words. */
18778 while (ptr
+ 3 < end
)
18780 tmp
= contents
[ptr
];
18781 contents
[ptr
] = contents
[ptr
+ 3];
18782 contents
[ptr
+ 3] = tmp
;
18783 tmp
= contents
[ptr
+ 1];
18784 contents
[ptr
+ 1] = contents
[ptr
+ 2];
18785 contents
[ptr
+ 2] = tmp
;
18791 /* Byte swap code halfwords. */
18792 while (ptr
+ 1 < end
)
18794 tmp
= contents
[ptr
];
18795 contents
[ptr
] = contents
[ptr
+ 1];
18796 contents
[ptr
+ 1] = tmp
;
18802 /* Leave data alone. */
18810 arm_data
->mapcount
= -1;
18811 arm_data
->mapsize
= 0;
18812 arm_data
->map
= NULL
;
18817 /* Mangle thumb function symbols as we read them in. */
18820 elf32_arm_swap_symbol_in (bfd
* abfd
,
18823 Elf_Internal_Sym
*dst
)
18825 Elf_Internal_Shdr
*symtab_hdr
;
18826 const char *name
= NULL
;
18828 if (!bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
))
18830 dst
->st_target_internal
= 0;
18832 /* New EABI objects mark thumb function symbols by setting the low bit of
18834 if (ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
18835 || ELF_ST_TYPE (dst
->st_info
) == STT_GNU_IFUNC
)
18837 if (dst
->st_value
& 1)
18839 dst
->st_value
&= ~(bfd_vma
) 1;
18840 ARM_SET_SYM_BRANCH_TYPE (dst
->st_target_internal
,
18841 ST_BRANCH_TO_THUMB
);
18844 ARM_SET_SYM_BRANCH_TYPE (dst
->st_target_internal
, ST_BRANCH_TO_ARM
);
18846 else if (ELF_ST_TYPE (dst
->st_info
) == STT_ARM_TFUNC
)
18848 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_FUNC
);
18849 ARM_SET_SYM_BRANCH_TYPE (dst
->st_target_internal
, ST_BRANCH_TO_THUMB
);
18851 else if (ELF_ST_TYPE (dst
->st_info
) == STT_SECTION
)
18852 ARM_SET_SYM_BRANCH_TYPE (dst
->st_target_internal
, ST_BRANCH_LONG
);
18854 ARM_SET_SYM_BRANCH_TYPE (dst
->st_target_internal
, ST_BRANCH_UNKNOWN
);
18856 /* Mark CMSE special symbols. */
18857 symtab_hdr
= & elf_symtab_hdr (abfd
);
18858 if (symtab_hdr
->sh_size
)
18859 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, dst
, NULL
);
18860 if (name
&& CONST_STRNEQ (name
, CMSE_PREFIX
))
18861 ARM_SET_SYM_CMSE_SPCL (dst
->st_target_internal
);
18867 /* Mangle thumb function symbols as we write them out. */
18870 elf32_arm_swap_symbol_out (bfd
*abfd
,
18871 const Elf_Internal_Sym
*src
,
18875 Elf_Internal_Sym newsym
;
18877 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
18878 of the address set, as per the new EABI. We do this unconditionally
18879 because objcopy does not set the elf header flags until after
18880 it writes out the symbol table. */
18881 if (ARM_GET_SYM_BRANCH_TYPE (src
->st_target_internal
) == ST_BRANCH_TO_THUMB
)
18884 if (ELF_ST_TYPE (src
->st_info
) != STT_GNU_IFUNC
)
18885 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
18886 if (newsym
.st_shndx
!= SHN_UNDEF
)
18888 /* Do this only for defined symbols. At link type, the static
18889 linker will simulate the work of dynamic linker of resolving
18890 symbols and will carry over the thumbness of found symbols to
18891 the output symbol table. It's not clear how it happens, but
18892 the thumbness of undefined symbols can well be different at
18893 runtime, and writing '1' for them will be confusing for users
18894 and possibly for dynamic linker itself.
18896 newsym
.st_value
|= 1;
18901 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
18904 /* Add the PT_ARM_EXIDX program header. */
18907 elf32_arm_modify_segment_map (bfd
*abfd
,
18908 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
18910 struct elf_segment_map
*m
;
18913 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
18914 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
18916 /* If there is already a PT_ARM_EXIDX header, then we do not
18917 want to add another one. This situation arises when running
18918 "strip"; the input binary already has the header. */
18919 m
= elf_seg_map (abfd
);
18920 while (m
&& m
->p_type
!= PT_ARM_EXIDX
)
18924 m
= (struct elf_segment_map
*)
18925 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
18928 m
->p_type
= PT_ARM_EXIDX
;
18930 m
->sections
[0] = sec
;
18932 m
->next
= elf_seg_map (abfd
);
18933 elf_seg_map (abfd
) = m
;
18940 /* We may add a PT_ARM_EXIDX program header. */
18943 elf32_arm_additional_program_headers (bfd
*abfd
,
18944 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
18948 sec
= bfd_get_section_by_name (abfd
, ".ARM.exidx");
18949 if (sec
!= NULL
&& (sec
->flags
& SEC_LOAD
) != 0)
18955 /* Hook called by the linker routine which adds symbols from an object
18959 elf32_arm_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
18960 Elf_Internal_Sym
*sym
, const char **namep
,
18961 flagword
*flagsp
, asection
**secp
, bfd_vma
*valp
)
18963 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
18964 && (abfd
->flags
& DYNAMIC
) == 0
18965 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
18966 elf_tdata (info
->output_bfd
)->has_gnu_symbols
|= elf_gnu_symbol_ifunc
;
18968 if (elf32_arm_hash_table (info
) == NULL
)
18971 if (elf32_arm_hash_table (info
)->vxworks_p
18972 && !elf_vxworks_add_symbol_hook (abfd
, info
, sym
, namep
,
18973 flagsp
, secp
, valp
))
18979 /* We use this to override swap_symbol_in and swap_symbol_out. */
18980 const struct elf_size_info elf32_arm_size_info
=
18982 sizeof (Elf32_External_Ehdr
),
18983 sizeof (Elf32_External_Phdr
),
18984 sizeof (Elf32_External_Shdr
),
18985 sizeof (Elf32_External_Rel
),
18986 sizeof (Elf32_External_Rela
),
18987 sizeof (Elf32_External_Sym
),
18988 sizeof (Elf32_External_Dyn
),
18989 sizeof (Elf_External_Note
),
18993 ELFCLASS32
, EV_CURRENT
,
18994 bfd_elf32_write_out_phdrs
,
18995 bfd_elf32_write_shdrs_and_ehdr
,
18996 bfd_elf32_checksum_contents
,
18997 bfd_elf32_write_relocs
,
18998 elf32_arm_swap_symbol_in
,
18999 elf32_arm_swap_symbol_out
,
19000 bfd_elf32_slurp_reloc_table
,
19001 bfd_elf32_slurp_symbol_table
,
19002 bfd_elf32_swap_dyn_in
,
19003 bfd_elf32_swap_dyn_out
,
19004 bfd_elf32_swap_reloc_in
,
19005 bfd_elf32_swap_reloc_out
,
19006 bfd_elf32_swap_reloca_in
,
19007 bfd_elf32_swap_reloca_out
19011 read_code32 (const bfd
*abfd
, const bfd_byte
*addr
)
19013 /* V7 BE8 code is always little endian. */
19014 if ((elf_elfheader (abfd
)->e_flags
& EF_ARM_BE8
) != 0)
19015 return bfd_getl32 (addr
);
19017 return bfd_get_32 (abfd
, addr
);
19021 read_code16 (const bfd
*abfd
, const bfd_byte
*addr
)
19023 /* V7 BE8 code is always little endian. */
19024 if ((elf_elfheader (abfd
)->e_flags
& EF_ARM_BE8
) != 0)
19025 return bfd_getl16 (addr
);
19027 return bfd_get_16 (abfd
, addr
);
19030 /* Return size of plt0 entry starting at ADDR
19031 or (bfd_vma) -1 if size can not be determined. */
19034 elf32_arm_plt0_size (const bfd
*abfd
, const bfd_byte
*addr
)
19036 bfd_vma first_word
;
19039 first_word
= read_code32 (abfd
, addr
);
19041 if (first_word
== elf32_arm_plt0_entry
[0])
19042 plt0_size
= 4 * ARRAY_SIZE (elf32_arm_plt0_entry
);
19043 else if (first_word
== elf32_thumb2_plt0_entry
[0])
19044 plt0_size
= 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry
);
19046 /* We don't yet handle this PLT format. */
19047 return (bfd_vma
) -1;
19052 /* Return size of plt entry starting at offset OFFSET
19053 of plt section located at address START
19054 or (bfd_vma) -1 if size can not be determined. */
19057 elf32_arm_plt_size (const bfd
*abfd
, const bfd_byte
*start
, bfd_vma offset
)
19059 bfd_vma first_insn
;
19060 bfd_vma plt_size
= 0;
19061 const bfd_byte
*addr
= start
+ offset
;
19063 /* PLT entry size if fixed on Thumb-only platforms. */
19064 if (read_code32 (abfd
, start
) == elf32_thumb2_plt0_entry
[0])
19065 return 4 * ARRAY_SIZE (elf32_thumb2_plt_entry
);
19067 /* Respect Thumb stub if necessary. */
19068 if (read_code16 (abfd
, addr
) == elf32_arm_plt_thumb_stub
[0])
19070 plt_size
+= 2 * ARRAY_SIZE(elf32_arm_plt_thumb_stub
);
19073 /* Strip immediate from first add. */
19074 first_insn
= read_code32 (abfd
, addr
+ plt_size
) & 0xffffff00;
19076 #ifdef FOUR_WORD_PLT
19077 if (first_insn
== elf32_arm_plt_entry
[0])
19078 plt_size
+= 4 * ARRAY_SIZE (elf32_arm_plt_entry
);
19080 if (first_insn
== elf32_arm_plt_entry_long
[0])
19081 plt_size
+= 4 * ARRAY_SIZE (elf32_arm_plt_entry_long
);
19082 else if (first_insn
== elf32_arm_plt_entry_short
[0])
19083 plt_size
+= 4 * ARRAY_SIZE (elf32_arm_plt_entry_short
);
19086 /* We don't yet handle this PLT format. */
19087 return (bfd_vma
) -1;
19092 /* Implementation is shamelessly borrowed from _bfd_elf_get_synthetic_symtab. */
19095 elf32_arm_get_synthetic_symtab (bfd
*abfd
,
19096 long symcount ATTRIBUTE_UNUSED
,
19097 asymbol
**syms ATTRIBUTE_UNUSED
,
19107 Elf_Internal_Shdr
*hdr
;
19115 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
19118 if (dynsymcount
<= 0)
19121 relplt
= bfd_get_section_by_name (abfd
, ".rel.plt");
19122 if (relplt
== NULL
)
19125 hdr
= &elf_section_data (relplt
)->this_hdr
;
19126 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
19127 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
19130 plt
= bfd_get_section_by_name (abfd
, ".plt");
19134 if (!elf32_arm_size_info
.slurp_reloc_table (abfd
, relplt
, dynsyms
, TRUE
))
19137 data
= plt
->contents
;
19140 if (!bfd_get_full_section_contents(abfd
, (asection
*) plt
, &data
) || data
== NULL
)
19142 bfd_cache_section_contents((asection
*) plt
, data
);
19145 count
= relplt
->size
/ hdr
->sh_entsize
;
19146 size
= count
* sizeof (asymbol
);
19147 p
= relplt
->relocation
;
19148 for (i
= 0; i
< count
; i
++, p
+= elf32_arm_size_info
.int_rels_per_ext_rel
)
19150 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
19151 if (p
->addend
!= 0)
19152 size
+= sizeof ("+0x") - 1 + 8;
19155 s
= *ret
= (asymbol
*) bfd_malloc (size
);
19159 offset
= elf32_arm_plt0_size (abfd
, data
);
19160 if (offset
== (bfd_vma
) -1)
19163 names
= (char *) (s
+ count
);
19164 p
= relplt
->relocation
;
19166 for (i
= 0; i
< count
; i
++, p
+= elf32_arm_size_info
.int_rels_per_ext_rel
)
19170 bfd_vma plt_size
= elf32_arm_plt_size (abfd
, data
, offset
);
19171 if (plt_size
== (bfd_vma
) -1)
19174 *s
= **p
->sym_ptr_ptr
;
19175 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
19176 we are defining a symbol, ensure one of them is set. */
19177 if ((s
->flags
& BSF_LOCAL
) == 0)
19178 s
->flags
|= BSF_GLOBAL
;
19179 s
->flags
|= BSF_SYNTHETIC
;
19184 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
19185 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
19187 if (p
->addend
!= 0)
19191 memcpy (names
, "+0x", sizeof ("+0x") - 1);
19192 names
+= sizeof ("+0x") - 1;
19193 bfd_sprintf_vma (abfd
, buf
, p
->addend
);
19194 for (a
= buf
; *a
== '0'; ++a
)
19197 memcpy (names
, a
, len
);
19200 memcpy (names
, "@plt", sizeof ("@plt"));
19201 names
+= sizeof ("@plt");
19203 offset
+= plt_size
;
19210 elf32_arm_section_flags (flagword
*flags
, const Elf_Internal_Shdr
* hdr
)
19212 if (hdr
->sh_flags
& SHF_ARM_PURECODE
)
19213 *flags
|= SEC_ELF_PURECODE
;
19218 elf32_arm_lookup_section_flags (char *flag_name
)
19220 if (!strcmp (flag_name
, "SHF_ARM_PURECODE"))
19221 return SHF_ARM_PURECODE
;
19223 return SEC_NO_FLAGS
;
19226 static unsigned int
19227 elf32_arm_count_additional_relocs (asection
*sec
)
19229 struct _arm_elf_section_data
*arm_data
;
19230 arm_data
= get_arm_elf_section_data (sec
);
19232 return arm_data
== NULL
? 0 : arm_data
->additional_reloc_count
;
19235 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
19236 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
19237 FALSE otherwise. ISECTION is the best guess matching section from the
19238 input bfd IBFD, but it might be NULL. */
19241 elf32_arm_copy_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
19242 bfd
*obfd ATTRIBUTE_UNUSED
,
19243 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
19244 Elf_Internal_Shdr
*osection
)
19246 switch (osection
->sh_type
)
19248 case SHT_ARM_EXIDX
:
19250 Elf_Internal_Shdr
**oheaders
= elf_elfsections (obfd
);
19251 Elf_Internal_Shdr
**iheaders
= elf_elfsections (ibfd
);
19254 osection
->sh_flags
= SHF_ALLOC
| SHF_LINK_ORDER
;
19255 osection
->sh_info
= 0;
19257 /* The sh_link field must be set to the text section associated with
19258 this index section. Unfortunately the ARM EHABI does not specify
19259 exactly how to determine this association. Our caller does try
19260 to match up OSECTION with its corresponding input section however
19261 so that is a good first guess. */
19262 if (isection
!= NULL
19263 && osection
->bfd_section
!= NULL
19264 && isection
->bfd_section
!= NULL
19265 && isection
->bfd_section
->output_section
!= NULL
19266 && isection
->bfd_section
->output_section
== osection
->bfd_section
19267 && iheaders
!= NULL
19268 && isection
->sh_link
> 0
19269 && isection
->sh_link
< elf_numsections (ibfd
)
19270 && iheaders
[isection
->sh_link
]->bfd_section
!= NULL
19271 && iheaders
[isection
->sh_link
]->bfd_section
->output_section
!= NULL
19274 for (i
= elf_numsections (obfd
); i
-- > 0;)
19275 if (oheaders
[i
]->bfd_section
19276 == iheaders
[isection
->sh_link
]->bfd_section
->output_section
)
19282 /* Failing that we have to find a matching section ourselves. If
19283 we had the output section name available we could compare that
19284 with input section names. Unfortunately we don't. So instead
19285 we use a simple heuristic and look for the nearest executable
19286 section before this one. */
19287 for (i
= elf_numsections (obfd
); i
-- > 0;)
19288 if (oheaders
[i
] == osection
)
19294 if (oheaders
[i
]->sh_type
== SHT_PROGBITS
19295 && (oheaders
[i
]->sh_flags
& (SHF_ALLOC
| SHF_EXECINSTR
))
19296 == (SHF_ALLOC
| SHF_EXECINSTR
))
19302 osection
->sh_link
= i
;
19303 /* If the text section was part of a group
19304 then the index section should be too. */
19305 if (oheaders
[i
]->sh_flags
& SHF_GROUP
)
19306 osection
->sh_flags
|= SHF_GROUP
;
19312 case SHT_ARM_PREEMPTMAP
:
19313 osection
->sh_flags
= SHF_ALLOC
;
19316 case SHT_ARM_ATTRIBUTES
:
19317 case SHT_ARM_DEBUGOVERLAY
:
19318 case SHT_ARM_OVERLAYSECTION
:
19326 /* Returns TRUE if NAME is an ARM mapping symbol.
19327 Traditionally the symbols $a, $d and $t have been used.
19328 The ARM ELF standard also defines $x (for A64 code). It also allows a
19329 period initiated suffix to be added to the symbol: "$[adtx]\.[:sym_char]+".
19330 Other tools might also produce $b (Thumb BL), $f, $p, $m and $v, but we do
19331 not support them here. $t.x indicates the start of ThumbEE instructions. */
19334 is_arm_mapping_symbol (const char * name
)
19336 return name
!= NULL
/* Paranoia. */
19337 && name
[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
19338 the mapping symbols could have acquired a prefix.
19339 We do not support this here, since such symbols no
19340 longer conform to the ARM ELF ABI. */
19341 && (name
[1] == 'a' || name
[1] == 'd' || name
[1] == 't' || name
[1] == 'x')
19342 && (name
[2] == 0 || name
[2] == '.');
19343 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
19344 any characters that follow the period are legal characters for the body
19345 of a symbol's name. For now we just assume that this is the case. */
19348 /* Make sure that mapping symbols in object files are not removed via the
19349 "strip --strip-unneeded" tool. These symbols are needed in order to
19350 correctly generate interworking veneers, and for byte swapping code
19351 regions. Once an object file has been linked, it is safe to remove the
19352 symbols as they will no longer be needed. */
19355 elf32_arm_backend_symbol_processing (bfd
*abfd
, asymbol
*sym
)
19357 if (((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0)
19358 && sym
->section
!= bfd_abs_section_ptr
19359 && is_arm_mapping_symbol (sym
->name
))
19360 sym
->flags
|= BSF_KEEP
;
19363 #undef elf_backend_copy_special_section_fields
19364 #define elf_backend_copy_special_section_fields elf32_arm_copy_special_section_fields
19366 #define ELF_ARCH bfd_arch_arm
19367 #define ELF_TARGET_ID ARM_ELF_DATA
19368 #define ELF_MACHINE_CODE EM_ARM
19369 #ifdef __QNXTARGET__
19370 #define ELF_MAXPAGESIZE 0x1000
19372 #define ELF_MAXPAGESIZE 0x10000
19374 #define ELF_MINPAGESIZE 0x1000
19375 #define ELF_COMMONPAGESIZE 0x1000
19377 #define bfd_elf32_mkobject elf32_arm_mkobject
19379 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
19380 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
19381 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
19382 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
19383 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
19384 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
19385 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
19386 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
19387 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
19388 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
19389 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
19390 #define bfd_elf32_bfd_final_link elf32_arm_final_link
19391 #define bfd_elf32_get_synthetic_symtab elf32_arm_get_synthetic_symtab
19393 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
19394 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
19395 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
19396 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
19397 #define elf_backend_check_relocs elf32_arm_check_relocs
19398 #define elf_backend_update_relocs elf32_arm_update_relocs
19399 #define elf_backend_relocate_section elf32_arm_relocate_section
19400 #define elf_backend_write_section elf32_arm_write_section
19401 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
19402 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
19403 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
19404 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
19405 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
19406 #define elf_backend_always_size_sections elf32_arm_always_size_sections
19407 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
19408 #define elf_backend_post_process_headers elf32_arm_post_process_headers
19409 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
19410 #define elf_backend_object_p elf32_arm_object_p
19411 #define elf_backend_fake_sections elf32_arm_fake_sections
19412 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
19413 #define elf_backend_final_write_processing elf32_arm_final_write_processing
19414 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
19415 #define elf_backend_size_info elf32_arm_size_info
19416 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
19417 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
19418 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
19419 #define elf_backend_filter_implib_symbols elf32_arm_filter_implib_symbols
19420 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
19421 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
19422 #define elf_backend_count_additional_relocs elf32_arm_count_additional_relocs
19423 #define elf_backend_symbol_processing elf32_arm_backend_symbol_processing
19425 #define elf_backend_can_refcount 1
19426 #define elf_backend_can_gc_sections 1
19427 #define elf_backend_plt_readonly 1
19428 #define elf_backend_want_got_plt 1
19429 #define elf_backend_want_plt_sym 0
19430 #define elf_backend_want_dynrelro 1
19431 #define elf_backend_may_use_rel_p 1
19432 #define elf_backend_may_use_rela_p 0
19433 #define elf_backend_default_use_rela_p 0
19434 #define elf_backend_dtrel_excludes_plt 1
19436 #define elf_backend_got_header_size 12
19437 #define elf_backend_extern_protected_data 1
19439 #undef elf_backend_obj_attrs_vendor
19440 #define elf_backend_obj_attrs_vendor "aeabi"
19441 #undef elf_backend_obj_attrs_section
19442 #define elf_backend_obj_attrs_section ".ARM.attributes"
19443 #undef elf_backend_obj_attrs_arg_type
19444 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
19445 #undef elf_backend_obj_attrs_section_type
19446 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
19447 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
19448 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
19450 #undef elf_backend_section_flags
19451 #define elf_backend_section_flags elf32_arm_section_flags
19452 #undef elf_backend_lookup_section_flags_hook
19453 #define elf_backend_lookup_section_flags_hook elf32_arm_lookup_section_flags
19455 #include "elf32-target.h"
19457 /* Native Client targets. */
19459 #undef TARGET_LITTLE_SYM
19460 #define TARGET_LITTLE_SYM arm_elf32_nacl_le_vec
19461 #undef TARGET_LITTLE_NAME
19462 #define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
19463 #undef TARGET_BIG_SYM
19464 #define TARGET_BIG_SYM arm_elf32_nacl_be_vec
19465 #undef TARGET_BIG_NAME
19466 #define TARGET_BIG_NAME "elf32-bigarm-nacl"
19468 /* Like elf32_arm_link_hash_table_create -- but overrides
19469 appropriately for NaCl. */
19471 static struct bfd_link_hash_table
*
19472 elf32_arm_nacl_link_hash_table_create (bfd
*abfd
)
19474 struct bfd_link_hash_table
*ret
;
19476 ret
= elf32_arm_link_hash_table_create (abfd
);
19479 struct elf32_arm_link_hash_table
*htab
19480 = (struct elf32_arm_link_hash_table
*) ret
;
19484 htab
->plt_header_size
= 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry
);
19485 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry
);
19490 /* Since NaCl doesn't use the ARM-specific unwind format, we don't
19491 really need to use elf32_arm_modify_segment_map. But we do it
19492 anyway just to reduce gratuitous differences with the stock ARM backend. */
19495 elf32_arm_nacl_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
19497 return (elf32_arm_modify_segment_map (abfd
, info
)
19498 && nacl_modify_segment_map (abfd
, info
));
19502 elf32_arm_nacl_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
19504 elf32_arm_final_write_processing (abfd
, linker
);
19505 nacl_final_write_processing (abfd
, linker
);
19509 elf32_arm_nacl_plt_sym_val (bfd_vma i
, const asection
*plt
,
19510 const arelent
*rel ATTRIBUTE_UNUSED
)
19513 + 4 * (ARRAY_SIZE (elf32_arm_nacl_plt0_entry
) +
19514 i
* ARRAY_SIZE (elf32_arm_nacl_plt_entry
));
19518 #define elf32_bed elf32_arm_nacl_bed
19519 #undef bfd_elf32_bfd_link_hash_table_create
19520 #define bfd_elf32_bfd_link_hash_table_create \
19521 elf32_arm_nacl_link_hash_table_create
19522 #undef elf_backend_plt_alignment
19523 #define elf_backend_plt_alignment 4
19524 #undef elf_backend_modify_segment_map
19525 #define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
19526 #undef elf_backend_modify_program_headers
19527 #define elf_backend_modify_program_headers nacl_modify_program_headers
19528 #undef elf_backend_final_write_processing
19529 #define elf_backend_final_write_processing elf32_arm_nacl_final_write_processing
19530 #undef bfd_elf32_get_synthetic_symtab
19531 #undef elf_backend_plt_sym_val
19532 #define elf_backend_plt_sym_val elf32_arm_nacl_plt_sym_val
19533 #undef elf_backend_copy_special_section_fields
19535 #undef ELF_MINPAGESIZE
19536 #undef ELF_COMMONPAGESIZE
19539 #include "elf32-target.h"
19541 /* Reset to defaults. */
19542 #undef elf_backend_plt_alignment
19543 #undef elf_backend_modify_segment_map
19544 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
19545 #undef elf_backend_modify_program_headers
19546 #undef elf_backend_final_write_processing
19547 #define elf_backend_final_write_processing elf32_arm_final_write_processing
19548 #undef ELF_MINPAGESIZE
19549 #define ELF_MINPAGESIZE 0x1000
19550 #undef ELF_COMMONPAGESIZE
19551 #define ELF_COMMONPAGESIZE 0x1000
19554 /* VxWorks Targets. */
19556 #undef TARGET_LITTLE_SYM
19557 #define TARGET_LITTLE_SYM arm_elf32_vxworks_le_vec
19558 #undef TARGET_LITTLE_NAME
19559 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
19560 #undef TARGET_BIG_SYM
19561 #define TARGET_BIG_SYM arm_elf32_vxworks_be_vec
19562 #undef TARGET_BIG_NAME
19563 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
19565 /* Like elf32_arm_link_hash_table_create -- but overrides
19566 appropriately for VxWorks. */
19568 static struct bfd_link_hash_table
*
19569 elf32_arm_vxworks_link_hash_table_create (bfd
*abfd
)
19571 struct bfd_link_hash_table
*ret
;
19573 ret
= elf32_arm_link_hash_table_create (abfd
);
19576 struct elf32_arm_link_hash_table
*htab
19577 = (struct elf32_arm_link_hash_table
*) ret
;
19579 htab
->vxworks_p
= 1;
19585 elf32_arm_vxworks_final_write_processing (bfd
*abfd
, bfd_boolean linker
)
19587 elf32_arm_final_write_processing (abfd
, linker
);
19588 elf_vxworks_final_write_processing (abfd
, linker
);
19592 #define elf32_bed elf32_arm_vxworks_bed
19594 #undef bfd_elf32_bfd_link_hash_table_create
19595 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
19596 #undef elf_backend_final_write_processing
19597 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
19598 #undef elf_backend_emit_relocs
19599 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
19601 #undef elf_backend_may_use_rel_p
19602 #define elf_backend_may_use_rel_p 0
19603 #undef elf_backend_may_use_rela_p
19604 #define elf_backend_may_use_rela_p 1
19605 #undef elf_backend_default_use_rela_p
19606 #define elf_backend_default_use_rela_p 1
19607 #undef elf_backend_want_plt_sym
19608 #define elf_backend_want_plt_sym 1
19609 #undef ELF_MAXPAGESIZE
19610 #define ELF_MAXPAGESIZE 0x1000
19612 #include "elf32-target.h"
19615 /* Merge backend specific data from an object file to the output
19616 object file when linking. */
19619 elf32_arm_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
19621 bfd
*obfd
= info
->output_bfd
;
19622 flagword out_flags
;
19624 bfd_boolean flags_compatible
= TRUE
;
19627 /* Check if we have the same endianness. */
19628 if (! _bfd_generic_verify_endian_match (ibfd
, info
))
19631 if (! is_arm_elf (ibfd
) || ! is_arm_elf (obfd
))
19634 if (!elf32_arm_merge_eabi_attributes (ibfd
, info
))
19637 /* The input BFD must have had its flags initialised. */
19638 /* The following seems bogus to me -- The flags are initialized in
19639 the assembler but I don't think an elf_flags_init field is
19640 written into the object. */
19641 /* BFD_ASSERT (elf_flags_init (ibfd)); */
19643 in_flags
= elf_elfheader (ibfd
)->e_flags
;
19644 out_flags
= elf_elfheader (obfd
)->e_flags
;
19646 /* In theory there is no reason why we couldn't handle this. However
19647 in practice it isn't even close to working and there is no real
19648 reason to want it. */
19649 if (EF_ARM_EABI_VERSION (in_flags
) >= EF_ARM_EABI_VER4
19650 && !(ibfd
->flags
& DYNAMIC
)
19651 && (in_flags
& EF_ARM_BE8
))
19653 _bfd_error_handler (_("error: %B is already in final BE8 format"),
19658 if (!elf_flags_init (obfd
))
19660 /* If the input is the default architecture and had the default
19661 flags then do not bother setting the flags for the output
19662 architecture, instead allow future merges to do this. If no
19663 future merges ever set these flags then they will retain their
19664 uninitialised values, which surprise surprise, correspond
19665 to the default values. */
19666 if (bfd_get_arch_info (ibfd
)->the_default
19667 && elf_elfheader (ibfd
)->e_flags
== 0)
19670 elf_flags_init (obfd
) = TRUE
;
19671 elf_elfheader (obfd
)->e_flags
= in_flags
;
19673 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
19674 && bfd_get_arch_info (obfd
)->the_default
)
19675 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
19680 /* Determine what should happen if the input ARM architecture
19681 does not match the output ARM architecture. */
19682 if (! bfd_arm_merge_machines (ibfd
, obfd
))
19685 /* Identical flags must be compatible. */
19686 if (in_flags
== out_flags
)
19689 /* Check to see if the input BFD actually contains any sections. If
19690 not, its flags may not have been initialised either, but it
19691 cannot actually cause any incompatiblity. Do not short-circuit
19692 dynamic objects; their section list may be emptied by
19693 elf_link_add_object_symbols.
19695 Also check to see if there are no code sections in the input.
19696 In this case there is no need to check for code specific flags.
19697 XXX - do we need to worry about floating-point format compatability
19698 in data sections ? */
19699 if (!(ibfd
->flags
& DYNAMIC
))
19701 bfd_boolean null_input_bfd
= TRUE
;
19702 bfd_boolean only_data_sections
= TRUE
;
19704 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
19706 /* Ignore synthetic glue sections. */
19707 if (strcmp (sec
->name
, ".glue_7")
19708 && strcmp (sec
->name
, ".glue_7t"))
19710 if ((bfd_get_section_flags (ibfd
, sec
)
19711 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
19712 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
19713 only_data_sections
= FALSE
;
19715 null_input_bfd
= FALSE
;
19720 if (null_input_bfd
|| only_data_sections
)
19724 /* Complain about various flag mismatches. */
19725 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags
),
19726 EF_ARM_EABI_VERSION (out_flags
)))
19729 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
19730 ibfd
, (in_flags
& EF_ARM_EABIMASK
) >> 24,
19731 obfd
, (out_flags
& EF_ARM_EABIMASK
) >> 24);
19735 /* Not sure what needs to be checked for EABI versions >= 1. */
19736 /* VxWorks libraries do not use these flags. */
19737 if (get_elf_backend_data (obfd
) != &elf32_arm_vxworks_bed
19738 && get_elf_backend_data (ibfd
) != &elf32_arm_vxworks_bed
19739 && EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
19741 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
19744 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
19745 ibfd
, in_flags
& EF_ARM_APCS_26
? 26 : 32,
19746 obfd
, out_flags
& EF_ARM_APCS_26
? 26 : 32);
19747 flags_compatible
= FALSE
;
19750 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
19752 if (in_flags
& EF_ARM_APCS_FLOAT
)
19754 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
19758 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
19761 flags_compatible
= FALSE
;
19764 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
19766 if (in_flags
& EF_ARM_VFP_FLOAT
)
19768 (_("error: %B uses VFP instructions, whereas %B does not"),
19772 (_("error: %B uses FPA instructions, whereas %B does not"),
19775 flags_compatible
= FALSE
;
19778 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
19780 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
19782 (_("error: %B uses Maverick instructions, whereas %B does not"),
19786 (_("error: %B does not use Maverick instructions, whereas %B does"),
19789 flags_compatible
= FALSE
;
19792 #ifdef EF_ARM_SOFT_FLOAT
19793 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
19795 /* We can allow interworking between code that is VFP format
19796 layout, and uses either soft float or integer regs for
19797 passing floating point arguments and results. We already
19798 know that the APCS_FLOAT flags match; similarly for VFP
19800 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
19801 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
19803 if (in_flags
& EF_ARM_SOFT_FLOAT
)
19805 (_("error: %B uses software FP, whereas %B uses hardware FP"),
19809 (_("error: %B uses hardware FP, whereas %B uses software FP"),
19812 flags_compatible
= FALSE
;
19817 /* Interworking mismatch is only a warning. */
19818 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
19820 if (in_flags
& EF_ARM_INTERWORK
)
19823 (_("Warning: %B supports interworking, whereas %B does not"),
19829 (_("Warning: %B does not support interworking, whereas %B does"),
19835 return flags_compatible
;
19839 /* Symbian OS Targets. */
19841 #undef TARGET_LITTLE_SYM
19842 #define TARGET_LITTLE_SYM arm_elf32_symbian_le_vec
19843 #undef TARGET_LITTLE_NAME
19844 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
19845 #undef TARGET_BIG_SYM
19846 #define TARGET_BIG_SYM arm_elf32_symbian_be_vec
19847 #undef TARGET_BIG_NAME
19848 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
19850 /* Like elf32_arm_link_hash_table_create -- but overrides
19851 appropriately for Symbian OS. */
19853 static struct bfd_link_hash_table
*
19854 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
19856 struct bfd_link_hash_table
*ret
;
19858 ret
= elf32_arm_link_hash_table_create (abfd
);
19861 struct elf32_arm_link_hash_table
*htab
19862 = (struct elf32_arm_link_hash_table
*)ret
;
19863 /* There is no PLT header for Symbian OS. */
19864 htab
->plt_header_size
= 0;
19865 /* The PLT entries are each one instruction and one word. */
19866 htab
->plt_entry_size
= 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
);
19867 htab
->symbian_p
= 1;
19868 /* Symbian uses armv5t or above, so use_blx is always true. */
19870 htab
->root
.is_relocatable_executable
= 1;
19875 static const struct bfd_elf_special_section
19876 elf32_arm_symbian_special_sections
[] =
19878 /* In a BPABI executable, the dynamic linking sections do not go in
19879 the loadable read-only segment. The post-linker may wish to
19880 refer to these sections, but they are not part of the final
19882 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, 0 },
19883 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, 0 },
19884 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, 0 },
19885 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, 0 },
19886 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, 0 },
19887 /* These sections do not need to be writable as the SymbianOS
19888 postlinker will arrange things so that no dynamic relocation is
19890 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
},
19891 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
},
19892 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
},
19893 { NULL
, 0, 0, 0, 0 }
19897 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
19898 struct bfd_link_info
*link_info
)
19900 /* BPABI objects are never loaded directly by an OS kernel; they are
19901 processed by a postlinker first, into an OS-specific format. If
19902 the D_PAGED bit is set on the file, BFD will align segments on
19903 page boundaries, so that an OS can directly map the file. With
19904 BPABI objects, that just results in wasted space. In addition,
19905 because we clear the D_PAGED bit, map_sections_to_segments will
19906 recognize that the program headers should not be mapped into any
19907 loadable segment. */
19908 abfd
->flags
&= ~D_PAGED
;
19909 elf32_arm_begin_write_processing (abfd
, link_info
);
19913 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
19914 struct bfd_link_info
*info
)
19916 struct elf_segment_map
*m
;
19919 /* BPABI shared libraries and executables should have a PT_DYNAMIC
19920 segment. However, because the .dynamic section is not marked
19921 with SEC_LOAD, the generic ELF code will not create such a
19923 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
19926 for (m
= elf_seg_map (abfd
); m
!= NULL
; m
= m
->next
)
19927 if (m
->p_type
== PT_DYNAMIC
)
19932 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
19933 m
->next
= elf_seg_map (abfd
);
19934 elf_seg_map (abfd
) = m
;
19938 /* Also call the generic arm routine. */
19939 return elf32_arm_modify_segment_map (abfd
, info
);
19942 /* Return address for Ith PLT stub in section PLT, for relocation REL
19943 or (bfd_vma) -1 if it should not be included. */
19946 elf32_arm_symbian_plt_sym_val (bfd_vma i
, const asection
*plt
,
19947 const arelent
*rel ATTRIBUTE_UNUSED
)
19949 return plt
->vma
+ 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry
) * i
;
19953 #define elf32_bed elf32_arm_symbian_bed
19955 /* The dynamic sections are not allocated on SymbianOS; the postlinker
19956 will process them and then discard them. */
19957 #undef ELF_DYNAMIC_SEC_FLAGS
19958 #define ELF_DYNAMIC_SEC_FLAGS \
19959 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
19961 #undef elf_backend_emit_relocs
19963 #undef bfd_elf32_bfd_link_hash_table_create
19964 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
19965 #undef elf_backend_special_sections
19966 #define elf_backend_special_sections elf32_arm_symbian_special_sections
19967 #undef elf_backend_begin_write_processing
19968 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
19969 #undef elf_backend_final_write_processing
19970 #define elf_backend_final_write_processing elf32_arm_final_write_processing
19972 #undef elf_backend_modify_segment_map
19973 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
19975 /* There is no .got section for BPABI objects, and hence no header. */
19976 #undef elf_backend_got_header_size
19977 #define elf_backend_got_header_size 0
19979 /* Similarly, there is no .got.plt section. */
19980 #undef elf_backend_want_got_plt
19981 #define elf_backend_want_got_plt 0
19983 #undef elf_backend_plt_sym_val
19984 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
19986 #undef elf_backend_may_use_rel_p
19987 #define elf_backend_may_use_rel_p 1
19988 #undef elf_backend_may_use_rela_p
19989 #define elf_backend_may_use_rela_p 0
19990 #undef elf_backend_default_use_rela_p
19991 #define elf_backend_default_use_rela_p 0
19992 #undef elf_backend_want_plt_sym
19993 #define elf_backend_want_plt_sym 0
19994 #undef elf_backend_dtrel_excludes_plt
19995 #define elf_backend_dtrel_excludes_plt 0
19996 #undef ELF_MAXPAGESIZE
19997 #define ELF_MAXPAGESIZE 0x8000
19999 #include "elf32-target.h"