1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
31 #define elf_info_to_howto 0
32 #define elf_info_to_howto_rel elf32_arm_info_to_howto
34 #define ARM_ELF_ABI_VERSION 0
35 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
37 static reloc_howto_type * elf32_arm_reloc_type_lookup
38 PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
39 static bfd_boolean elf32_arm_nabi_grok_prstatus
40 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
41 static bfd_boolean elf32_arm_nabi_grok_psinfo
42 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
45 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
48 static reloc_howto_type elf32_arm_howto_table[] =
51 HOWTO (R_ARM_NONE, /* type */
53 0, /* size (0 = byte, 1 = short, 2 = long) */
55 FALSE, /* pc_relative */
57 complain_overflow_dont,/* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_ARM_NONE", /* name */
60 FALSE, /* partial_inplace */
63 FALSE), /* pcrel_offset */
65 HOWTO (R_ARM_PC24, /* type */
67 2, /* size (0 = byte, 1 = short, 2 = long) */
69 TRUE, /* pc_relative */
71 complain_overflow_signed,/* complain_on_overflow */
72 bfd_elf_generic_reloc, /* special_function */
73 "R_ARM_PC24", /* name */
74 FALSE, /* partial_inplace */
75 0x00ffffff, /* src_mask */
76 0x00ffffff, /* dst_mask */
77 TRUE), /* pcrel_offset */
80 HOWTO (R_ARM_ABS32, /* type */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
84 FALSE, /* pc_relative */
86 complain_overflow_bitfield,/* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_ARM_ABS32", /* name */
89 FALSE, /* partial_inplace */
90 0xffffffff, /* src_mask */
91 0xffffffff, /* dst_mask */
92 FALSE), /* pcrel_offset */
94 /* standard 32bit pc-relative reloc */
95 HOWTO (R_ARM_REL32, /* type */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
99 TRUE, /* pc_relative */
101 complain_overflow_bitfield,/* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_ARM_REL32", /* name */
104 FALSE, /* partial_inplace */
105 0xffffffff, /* src_mask */
106 0xffffffff, /* dst_mask */
107 TRUE), /* pcrel_offset */
110 HOWTO (R_ARM_PC13, /* type */
112 0, /* size (0 = byte, 1 = short, 2 = long) */
114 FALSE, /* pc_relative */
116 complain_overflow_bitfield,/* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_ARM_PC13", /* name */
119 FALSE, /* partial_inplace */
120 0x000000ff, /* src_mask */
121 0x000000ff, /* dst_mask */
122 FALSE), /* pcrel_offset */
124 /* 16 bit absolute */
125 HOWTO (R_ARM_ABS16, /* type */
127 1, /* size (0 = byte, 1 = short, 2 = long) */
129 FALSE, /* pc_relative */
131 complain_overflow_bitfield,/* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_ARM_ABS16", /* name */
134 FALSE, /* partial_inplace */
135 0x0000ffff, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 FALSE), /* pcrel_offset */
139 /* 12 bit absolute */
140 HOWTO (R_ARM_ABS12, /* type */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
144 FALSE, /* pc_relative */
146 complain_overflow_bitfield,/* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_ARM_ABS12", /* name */
149 FALSE, /* partial_inplace */
150 0x000008ff, /* src_mask */
151 0x000008ff, /* dst_mask */
152 FALSE), /* pcrel_offset */
154 HOWTO (R_ARM_THM_ABS5, /* 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_THM_ABS5", /* name */
163 FALSE, /* partial_inplace */
164 0x000007e0, /* src_mask */
165 0x000007e0, /* dst_mask */
166 FALSE), /* pcrel_offset */
169 HOWTO (R_ARM_ABS8, /* type */
171 0, /* 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_ABS8", /* name */
178 FALSE, /* partial_inplace */
179 0x000000ff, /* src_mask */
180 0x000000ff, /* dst_mask */
181 FALSE), /* pcrel_offset */
183 HOWTO (R_ARM_SBREL32, /* type */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
187 FALSE, /* pc_relative */
189 complain_overflow_dont,/* complain_on_overflow */
190 bfd_elf_generic_reloc, /* special_function */
191 "R_ARM_SBREL32", /* name */
192 FALSE, /* partial_inplace */
193 0xffffffff, /* src_mask */
194 0xffffffff, /* dst_mask */
195 FALSE), /* pcrel_offset */
197 HOWTO (R_ARM_THM_PC22, /* type */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
201 TRUE, /* pc_relative */
203 complain_overflow_signed,/* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_ARM_THM_PC22", /* name */
206 FALSE, /* partial_inplace */
207 0x07ff07ff, /* src_mask */
208 0x07ff07ff, /* dst_mask */
209 TRUE), /* pcrel_offset */
211 HOWTO (R_ARM_THM_PC8, /* type */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
215 TRUE, /* pc_relative */
217 complain_overflow_signed,/* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_ARM_THM_PC8", /* name */
220 FALSE, /* partial_inplace */
221 0x000000ff, /* src_mask */
222 0x000000ff, /* dst_mask */
223 TRUE), /* pcrel_offset */
225 HOWTO (R_ARM_AMP_VCALL9, /* type */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
229 TRUE, /* pc_relative */
231 complain_overflow_signed,/* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_ARM_AMP_VCALL9", /* name */
234 FALSE, /* partial_inplace */
235 0x000000ff, /* src_mask */
236 0x000000ff, /* dst_mask */
237 TRUE), /* pcrel_offset */
239 HOWTO (R_ARM_SWI24, /* type */
241 0, /* size (0 = byte, 1 = short, 2 = long) */
243 FALSE, /* pc_relative */
245 complain_overflow_signed,/* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_ARM_SWI24", /* name */
248 FALSE, /* partial_inplace */
249 0x00000000, /* src_mask */
250 0x00000000, /* dst_mask */
251 FALSE), /* pcrel_offset */
253 HOWTO (R_ARM_THM_SWI8, /* type */
255 0, /* size (0 = byte, 1 = short, 2 = long) */
257 FALSE, /* pc_relative */
259 complain_overflow_signed,/* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_ARM_SWI8", /* name */
262 FALSE, /* partial_inplace */
263 0x00000000, /* src_mask */
264 0x00000000, /* dst_mask */
265 FALSE), /* pcrel_offset */
267 /* BLX instruction for the ARM. */
268 HOWTO (R_ARM_XPC25, /* type */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
272 TRUE, /* pc_relative */
274 complain_overflow_signed,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_ARM_XPC25", /* name */
277 FALSE, /* partial_inplace */
278 0x00ffffff, /* src_mask */
279 0x00ffffff, /* dst_mask */
280 TRUE), /* pcrel_offset */
282 /* BLX instruction for the Thumb. */
283 HOWTO (R_ARM_THM_XPC22, /* type */
285 2, /* size (0 = byte, 1 = short, 2 = long) */
287 TRUE, /* pc_relative */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_ARM_THM_XPC22", /* name */
292 FALSE, /* partial_inplace */
293 0x07ff07ff, /* src_mask */
294 0x07ff07ff, /* dst_mask */
295 TRUE), /* pcrel_offset */
297 /* Dynamic TLS relocations. */
299 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
303 FALSE, /* pc_relative */
305 complain_overflow_bitfield,/* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_ARM_TLS_DTPMOD32", /* name */
308 TRUE, /* partial_inplace */
309 0xffffffff, /* src_mask */
310 0xffffffff, /* dst_mask */
311 FALSE), /* pcrel_offset */
313 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
317 FALSE, /* pc_relative */
319 complain_overflow_bitfield,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_TLS_DTPOFF32", /* name */
322 TRUE, /* partial_inplace */
323 0xffffffff, /* src_mask */
324 0xffffffff, /* dst_mask */
325 FALSE), /* pcrel_offset */
327 HOWTO (R_ARM_TLS_TPOFF32, /* type */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
331 FALSE, /* pc_relative */
333 complain_overflow_bitfield,/* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_ARM_TLS_TPOFF32", /* name */
336 TRUE, /* partial_inplace */
337 0xffffffff, /* src_mask */
338 0xffffffff, /* dst_mask */
339 FALSE), /* pcrel_offset */
341 /* Relocs used in ARM Linux */
343 HOWTO (R_ARM_COPY, /* type */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
347 FALSE, /* pc_relative */
349 complain_overflow_bitfield,/* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_ARM_COPY", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE), /* pcrel_offset */
357 HOWTO (R_ARM_GLOB_DAT, /* type */
359 2, /* size (0 = byte, 1 = short, 2 = long) */
361 FALSE, /* pc_relative */
363 complain_overflow_bitfield,/* complain_on_overflow */
364 bfd_elf_generic_reloc, /* special_function */
365 "R_ARM_GLOB_DAT", /* name */
366 TRUE, /* partial_inplace */
367 0xffffffff, /* src_mask */
368 0xffffffff, /* dst_mask */
369 FALSE), /* pcrel_offset */
371 HOWTO (R_ARM_JUMP_SLOT, /* type */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
375 FALSE, /* pc_relative */
377 complain_overflow_bitfield,/* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_ARM_JUMP_SLOT", /* name */
380 TRUE, /* partial_inplace */
381 0xffffffff, /* src_mask */
382 0xffffffff, /* dst_mask */
383 FALSE), /* pcrel_offset */
385 HOWTO (R_ARM_RELATIVE, /* type */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
389 FALSE, /* pc_relative */
391 complain_overflow_bitfield,/* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_ARM_RELATIVE", /* name */
394 TRUE, /* partial_inplace */
395 0xffffffff, /* src_mask */
396 0xffffffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
399 HOWTO (R_ARM_GOTOFF, /* type */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
403 FALSE, /* pc_relative */
405 complain_overflow_bitfield,/* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_ARM_GOTOFF", /* name */
408 TRUE, /* partial_inplace */
409 0xffffffff, /* src_mask */
410 0xffffffff, /* dst_mask */
411 FALSE), /* pcrel_offset */
413 HOWTO (R_ARM_GOTPC, /* type */
415 2, /* size (0 = byte, 1 = short, 2 = long) */
417 TRUE, /* pc_relative */
419 complain_overflow_bitfield,/* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_ARM_GOTPC", /* name */
422 TRUE, /* partial_inplace */
423 0xffffffff, /* src_mask */
424 0xffffffff, /* dst_mask */
425 TRUE), /* pcrel_offset */
427 HOWTO (R_ARM_GOT32, /* type */
429 2, /* size (0 = byte, 1 = short, 2 = long) */
431 FALSE, /* pc_relative */
433 complain_overflow_bitfield,/* complain_on_overflow */
434 bfd_elf_generic_reloc, /* special_function */
435 "R_ARM_GOT32", /* name */
436 TRUE, /* partial_inplace */
437 0xffffffff, /* src_mask */
438 0xffffffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
441 HOWTO (R_ARM_PLT32, /* type */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
445 TRUE, /* pc_relative */
447 complain_overflow_bitfield,/* complain_on_overflow */
448 bfd_elf_generic_reloc, /* special_function */
449 "R_ARM_PLT32", /* name */
450 TRUE, /* partial_inplace */
451 0x00ffffff, /* src_mask */
452 0x00ffffff, /* dst_mask */
453 TRUE), /* pcrel_offset */
455 HOWTO (R_ARM_CALL, /* type */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
459 TRUE, /* pc_relative */
461 complain_overflow_signed,/* complain_on_overflow */
462 bfd_elf_generic_reloc, /* special_function */
463 "R_ARM_CALL", /* name */
464 FALSE, /* partial_inplace */
465 0x00ffffff, /* src_mask */
466 0x00ffffff, /* dst_mask */
467 TRUE), /* pcrel_offset */
469 HOWTO (R_ARM_JUMP24, /* type */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 TRUE, /* pc_relative */
475 complain_overflow_signed,/* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_ARM_JUMP24", /* name */
478 FALSE, /* partial_inplace */
479 0x00ffffff, /* src_mask */
480 0x00ffffff, /* dst_mask */
481 TRUE), /* pcrel_offset */
483 HOWTO (R_ARM_NONE, /* type */
485 0, /* size (0 = byte, 1 = short, 2 = long) */
487 FALSE, /* pc_relative */
489 complain_overflow_dont,/* complain_on_overflow */
490 bfd_elf_generic_reloc, /* special_function */
491 "R_ARM_unknown_30", /* name */
492 FALSE, /* partial_inplace */
495 FALSE), /* pcrel_offset */
497 HOWTO (R_ARM_NONE, /* type */
499 0, /* size (0 = byte, 1 = short, 2 = long) */
501 FALSE, /* pc_relative */
503 complain_overflow_dont,/* complain_on_overflow */
504 bfd_elf_generic_reloc, /* special_function */
505 "R_ARM_unknown_31", /* name */
506 FALSE, /* partial_inplace */
509 FALSE), /* pcrel_offset */
511 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
515 TRUE, /* pc_relative */
517 complain_overflow_dont,/* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_ARM_ALU_PCREL_7_0", /* name */
520 FALSE, /* partial_inplace */
521 0x00000fff, /* src_mask */
522 0x00000fff, /* dst_mask */
523 TRUE), /* pcrel_offset */
525 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
529 TRUE, /* pc_relative */
531 complain_overflow_dont,/* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_ARM_ALU_PCREL_15_8",/* name */
534 FALSE, /* partial_inplace */
535 0x00000fff, /* src_mask */
536 0x00000fff, /* dst_mask */
537 TRUE), /* pcrel_offset */
539 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
543 TRUE, /* pc_relative */
545 complain_overflow_dont,/* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_ARM_ALU_PCREL_23_15",/* name */
548 FALSE, /* partial_inplace */
549 0x00000fff, /* src_mask */
550 0x00000fff, /* dst_mask */
551 TRUE), /* pcrel_offset */
553 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
555 2, /* size (0 = byte, 1 = short, 2 = long) */
557 FALSE, /* pc_relative */
559 complain_overflow_dont,/* complain_on_overflow */
560 bfd_elf_generic_reloc, /* special_function */
561 "R_ARM_LDR_SBREL_11_0",/* name */
562 FALSE, /* partial_inplace */
563 0x00000fff, /* src_mask */
564 0x00000fff, /* dst_mask */
565 FALSE), /* pcrel_offset */
567 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
569 2, /* size (0 = byte, 1 = short, 2 = long) */
571 FALSE, /* pc_relative */
573 complain_overflow_dont,/* complain_on_overflow */
574 bfd_elf_generic_reloc, /* special_function */
575 "R_ARM_ALU_SBREL_19_12",/* name */
576 FALSE, /* partial_inplace */
577 0x000ff000, /* src_mask */
578 0x000ff000, /* dst_mask */
579 FALSE), /* pcrel_offset */
581 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
583 2, /* size (0 = byte, 1 = short, 2 = long) */
585 FALSE, /* pc_relative */
587 complain_overflow_dont,/* complain_on_overflow */
588 bfd_elf_generic_reloc, /* special_function */
589 "R_ARM_ALU_SBREL_27_20",/* name */
590 FALSE, /* partial_inplace */
591 0x0ff00000, /* src_mask */
592 0x0ff00000, /* dst_mask */
593 FALSE), /* pcrel_offset */
595 HOWTO (R_ARM_TARGET1, /* type */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
599 FALSE, /* pc_relative */
601 complain_overflow_dont,/* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_ARM_TARGET1", /* name */
604 FALSE, /* partial_inplace */
605 0xffffffff, /* src_mask */
606 0xffffffff, /* dst_mask */
607 FALSE), /* pcrel_offset */
609 HOWTO (R_ARM_ROSEGREL32, /* type */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
613 FALSE, /* pc_relative */
615 complain_overflow_dont,/* complain_on_overflow */
616 bfd_elf_generic_reloc, /* special_function */
617 "R_ARM_ROSEGREL32", /* name */
618 FALSE, /* partial_inplace */
619 0xffffffff, /* src_mask */
620 0xffffffff, /* dst_mask */
621 FALSE), /* pcrel_offset */
623 HOWTO (R_ARM_V4BX, /* type */
625 2, /* size (0 = byte, 1 = short, 2 = long) */
627 FALSE, /* pc_relative */
629 complain_overflow_dont,/* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 "R_ARM_V4BX", /* name */
632 FALSE, /* partial_inplace */
633 0xffffffff, /* src_mask */
634 0xffffffff, /* dst_mask */
635 FALSE), /* pcrel_offset */
637 HOWTO (R_ARM_TARGET2, /* type */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
641 FALSE, /* pc_relative */
643 complain_overflow_signed,/* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_ARM_TARGET2", /* name */
646 FALSE, /* partial_inplace */
647 0xffffffff, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
651 HOWTO (R_ARM_PREL31, /* type */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
655 TRUE, /* pc_relative */
657 complain_overflow_signed,/* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_ARM_PREL31", /* name */
660 FALSE, /* partial_inplace */
661 0x7fffffff, /* src_mask */
662 0x7fffffff, /* dst_mask */
663 TRUE), /* pcrel_offset */
666 static reloc_howto_type elf32_arm_tls_gd32_howto =
667 HOWTO (R_ARM_TLS_GD32, /* type */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE, /* pc_relative */
673 complain_overflow_bitfield,/* complain_on_overflow */
674 NULL, /* special_function */
675 "R_ARM_TLS_GD32", /* name */
676 TRUE, /* partial_inplace */
677 0xffffffff, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE); /* pcrel_offset */
681 static reloc_howto_type elf32_arm_tls_ldo32_howto =
682 HOWTO (R_ARM_TLS_LDO32, /* type */
684 2, /* size (0 = byte, 1 = short, 2 = long) */
686 FALSE, /* pc_relative */
688 complain_overflow_bitfield,/* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_ARM_TLS_LDO32", /* name */
691 TRUE, /* partial_inplace */
692 0xffffffff, /* src_mask */
693 0xffffffff, /* dst_mask */
694 FALSE); /* pcrel_offset */
696 static reloc_howto_type elf32_arm_tls_ldm32_howto =
697 HOWTO (R_ARM_TLS_LDM32, /* type */
699 2, /* size (0 = byte, 1 = short, 2 = long) */
701 FALSE, /* pc_relative */
703 complain_overflow_bitfield,/* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_ARM_TLS_LDM32", /* name */
706 TRUE, /* partial_inplace */
707 0xffffffff, /* src_mask */
708 0xffffffff, /* dst_mask */
709 FALSE); /* pcrel_offset */
711 static reloc_howto_type elf32_arm_tls_le32_howto =
712 HOWTO (R_ARM_TLS_LE32, /* type */
714 2, /* size (0 = byte, 1 = short, 2 = long) */
716 FALSE, /* pc_relative */
718 complain_overflow_bitfield,/* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_ARM_TLS_LE32", /* name */
721 TRUE, /* partial_inplace */
722 0xffffffff, /* src_mask */
723 0xffffffff, /* dst_mask */
724 FALSE); /* pcrel_offset */
726 static reloc_howto_type elf32_arm_tls_ie32_howto =
727 HOWTO (R_ARM_TLS_IE32, /* type */
729 2, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE, /* pc_relative */
733 complain_overflow_bitfield,/* complain_on_overflow */
734 NULL, /* special_function */
735 "R_ARM_TLS_IE32", /* name */
736 TRUE, /* partial_inplace */
737 0xffffffff, /* src_mask */
738 0xffffffff, /* dst_mask */
739 FALSE); /* pcrel_offset */
741 /* GNU extension to record C++ vtable hierarchy */
742 static reloc_howto_type elf32_arm_vtinherit_howto =
743 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE, /* pc_relative */
749 complain_overflow_dont, /* complain_on_overflow */
750 NULL, /* special_function */
751 "R_ARM_GNU_VTINHERIT", /* name */
752 FALSE, /* partial_inplace */
755 FALSE); /* pcrel_offset */
757 /* GNU extension to record C++ vtable member usage */
758 static reloc_howto_type elf32_arm_vtentry_howto =
759 HOWTO (R_ARM_GNU_VTENTRY, /* type */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
763 FALSE, /* pc_relative */
765 complain_overflow_dont, /* complain_on_overflow */
766 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
767 "R_ARM_GNU_VTENTRY", /* name */
768 FALSE, /* partial_inplace */
771 FALSE); /* pcrel_offset */
773 /* 12 bit pc relative */
774 static reloc_howto_type elf32_arm_thm_pc11_howto =
775 HOWTO (R_ARM_THM_PC11, /* type */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
779 TRUE, /* pc_relative */
781 complain_overflow_signed, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_ARM_THM_PC11", /* name */
784 FALSE, /* partial_inplace */
785 0x000007ff, /* src_mask */
786 0x000007ff, /* dst_mask */
787 TRUE); /* pcrel_offset */
789 /* 12 bit pc relative */
790 static reloc_howto_type elf32_arm_thm_pc9_howto =
791 HOWTO (R_ARM_THM_PC9, /* type */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
795 TRUE, /* pc_relative */
797 complain_overflow_signed, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_ARM_THM_PC9", /* name */
800 FALSE, /* partial_inplace */
801 0x000000ff, /* src_mask */
802 0x000000ff, /* dst_mask */
803 TRUE); /* pcrel_offset */
805 /* Place relative GOT-indirect. */
806 static reloc_howto_type elf32_arm_got_prel =
807 HOWTO (R_ARM_GOT_PREL, /* type */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
811 TRUE, /* pc_relative */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_ARM_GOT_PREL", /* name */
816 FALSE, /* partial_inplace */
817 0xffffffff, /* src_mask */
818 0xffffffff, /* dst_mask */
819 TRUE); /* pcrel_offset */
821 /* Currently unused relocations. */
822 static reloc_howto_type elf32_arm_r_howto[4] =
824 HOWTO (R_ARM_RREL32, /* type */
826 0, /* size (0 = byte, 1 = short, 2 = long) */
828 FALSE, /* pc_relative */
830 complain_overflow_dont,/* complain_on_overflow */
831 bfd_elf_generic_reloc, /* special_function */
832 "R_ARM_RREL32", /* name */
833 FALSE, /* partial_inplace */
836 FALSE), /* pcrel_offset */
838 HOWTO (R_ARM_RABS32, /* type */
840 0, /* size (0 = byte, 1 = short, 2 = long) */
842 FALSE, /* pc_relative */
844 complain_overflow_dont,/* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_ARM_RABS32", /* name */
847 FALSE, /* partial_inplace */
850 FALSE), /* pcrel_offset */
852 HOWTO (R_ARM_RPC24, /* type */
854 0, /* size (0 = byte, 1 = short, 2 = long) */
856 FALSE, /* pc_relative */
858 complain_overflow_dont,/* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_ARM_RPC24", /* name */
861 FALSE, /* partial_inplace */
864 FALSE), /* pcrel_offset */
866 HOWTO (R_ARM_RBASE, /* type */
868 0, /* size (0 = byte, 1 = short, 2 = long) */
870 FALSE, /* pc_relative */
872 complain_overflow_dont,/* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_ARM_RBASE", /* name */
875 FALSE, /* partial_inplace */
878 FALSE) /* pcrel_offset */
881 static reloc_howto_type *
882 elf32_arm_howto_from_type (unsigned int r_type)
884 if (r_type < NUM_ELEM (elf32_arm_howto_table))
885 return &elf32_arm_howto_table[r_type];
890 return &elf32_arm_got_prel;
892 case R_ARM_GNU_VTINHERIT:
893 return &elf32_arm_vtinherit_howto;
895 case R_ARM_GNU_VTENTRY:
896 return &elf32_arm_vtentry_howto;
899 return &elf32_arm_thm_pc11_howto;
902 return &elf32_arm_thm_pc9_howto;
905 return &elf32_arm_tls_gd32_howto;
908 case R_ARM_TLS_LDO32:
909 return &elf32_arm_tls_ldo32_howto;
912 case R_ARM_TLS_LDM32:
913 return &elf32_arm_tls_ldm32_howto;
917 return &elf32_arm_tls_ie32_howto;
921 return &elf32_arm_tls_le32_howto;
928 return &elf32_arm_r_howto[r_type - R_ARM_RREL32];
936 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
937 Elf_Internal_Rela * elf_reloc)
941 r_type = ELF32_R_TYPE (elf_reloc->r_info);
942 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
945 struct elf32_arm_reloc_map
947 bfd_reloc_code_real_type bfd_reloc_val;
948 unsigned char elf_reloc_val;
951 /* All entries in this list must also be present in elf32_arm_howto_table. */
952 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
954 {BFD_RELOC_NONE, R_ARM_NONE},
955 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
956 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
957 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
958 {BFD_RELOC_32, R_ARM_ABS32},
959 {BFD_RELOC_32_PCREL, R_ARM_REL32},
960 {BFD_RELOC_8, R_ARM_ABS8},
961 {BFD_RELOC_16, R_ARM_ABS16},
962 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
963 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
964 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22},
965 {BFD_RELOC_ARM_COPY, R_ARM_COPY},
966 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
967 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
968 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
969 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF},
970 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
971 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
972 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
973 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
974 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
975 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
976 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
977 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
978 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
979 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
980 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
981 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
982 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
983 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
984 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
985 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
986 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
989 static reloc_howto_type *
990 elf32_arm_reloc_type_lookup (abfd, code)
991 bfd *abfd ATTRIBUTE_UNUSED;
992 bfd_reloc_code_real_type code;
998 case BFD_RELOC_VTABLE_INHERIT:
999 return & elf32_arm_vtinherit_howto;
1001 case BFD_RELOC_VTABLE_ENTRY:
1002 return & elf32_arm_vtentry_howto;
1004 case BFD_RELOC_THUMB_PCREL_BRANCH12:
1005 return & elf32_arm_thm_pc11_howto;
1007 case BFD_RELOC_THUMB_PCREL_BRANCH9:
1008 return & elf32_arm_thm_pc9_howto;
1010 case BFD_RELOC_ARM_TLS_GD32:
1011 return & elf32_arm_tls_gd32_howto;
1013 case BFD_RELOC_ARM_TLS_LDO32:
1014 return & elf32_arm_tls_ldo32_howto;
1016 case BFD_RELOC_ARM_TLS_LDM32:
1017 return & elf32_arm_tls_ldm32_howto;
1019 case BFD_RELOC_ARM_TLS_IE32:
1020 return & elf32_arm_tls_ie32_howto;
1022 case BFD_RELOC_ARM_TLS_LE32:
1023 return & elf32_arm_tls_le32_howto;
1026 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1027 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1028 return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
1034 /* Support for core dump NOTE sections */
1036 elf32_arm_nabi_grok_prstatus (abfd, note)
1038 Elf_Internal_Note *note;
1043 switch (note->descsz)
1048 case 148: /* Linux/ARM 32-bit*/
1050 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1053 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1062 /* Make a ".reg/999" section. */
1063 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1064 size, note->descpos + offset);
1068 elf32_arm_nabi_grok_psinfo (abfd, note)
1070 Elf_Internal_Note *note;
1072 switch (note->descsz)
1077 case 124: /* Linux/ARM elf_prpsinfo */
1078 elf_tdata (abfd)->core_program
1079 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1080 elf_tdata (abfd)->core_command
1081 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1084 /* Note that for some reason, a spurious space is tacked
1085 onto the end of the args in some (at least one anyway)
1086 implementations, so strip it off if it exists. */
1089 char *command = elf_tdata (abfd)->core_command;
1090 int n = strlen (command);
1092 if (0 < n && command[n - 1] == ' ')
1093 command[n - 1] = '\0';
1099 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1100 #define TARGET_LITTLE_NAME "elf32-littlearm"
1101 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1102 #define TARGET_BIG_NAME "elf32-bigarm"
1104 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1105 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1107 typedef unsigned long int insn32;
1108 typedef unsigned short int insn16;
1110 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
1111 #define INTERWORK_FLAG(abfd) \
1112 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
1113 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1115 /* The linker script knows the section names for placement.
1116 The entry_names are used to do simple name mangling on the stubs.
1117 Given a function name, and its type, the stub can be found. The
1118 name can be changed. The only requirement is the %s be present. */
1119 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1120 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1122 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1123 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1125 /* The name of the dynamic interpreter. This is put in the .interp
1127 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1129 #ifdef FOUR_WORD_PLT
1131 /* The first entry in a procedure linkage table looks like
1132 this. It is set up so that any shared library function that is
1133 called before the relocation has been set up calls the dynamic
1135 static const bfd_vma elf32_arm_plt0_entry [] =
1137 0xe52de004, /* str lr, [sp, #-4]! */
1138 0xe59fe010, /* ldr lr, [pc, #16] */
1139 0xe08fe00e, /* add lr, pc, lr */
1140 0xe5bef008, /* ldr pc, [lr, #8]! */
1143 /* Subsequent entries in a procedure linkage table look like
1145 static const bfd_vma elf32_arm_plt_entry [] =
1147 0xe28fc600, /* add ip, pc, #NN */
1148 0xe28cca00, /* add ip, ip, #NN */
1149 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1150 0x00000000, /* unused */
1155 /* The first entry in a procedure linkage table looks like
1156 this. It is set up so that any shared library function that is
1157 called before the relocation has been set up calls the dynamic
1159 static const bfd_vma elf32_arm_plt0_entry [] =
1161 0xe52de004, /* str lr, [sp, #-4]! */
1162 0xe59fe004, /* ldr lr, [pc, #4] */
1163 0xe08fe00e, /* add lr, pc, lr */
1164 0xe5bef008, /* ldr pc, [lr, #8]! */
1165 0x00000000, /* &GOT[0] - . */
1168 /* Subsequent entries in a procedure linkage table look like
1170 static const bfd_vma elf32_arm_plt_entry [] =
1172 0xe28fc600, /* add ip, pc, #0xNN00000 */
1173 0xe28cca00, /* add ip, ip, #0xNN000 */
1174 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1179 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1180 #define PLT_THUMB_STUB_SIZE 4
1181 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1187 /* The entries in a PLT when using a DLL-based target with multiple
1189 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1191 0xe51ff004, /* ldr pc, [pc, #-4] */
1192 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1195 /* Used to build a map of a section. This is required for mixed-endian
1198 typedef struct elf32_elf_section_map
1203 elf32_arm_section_map;
1205 struct _arm_elf_section_data
1207 struct bfd_elf_section_data elf;
1209 elf32_arm_section_map *map;
1212 #define elf32_arm_section_data(sec) \
1213 ((struct _arm_elf_section_data *) elf_section_data (sec))
1215 /* The size of the thread control block. */
1218 struct elf32_arm_obj_tdata
1220 struct elf_obj_tdata root;
1222 /* tls_type for each local got entry. */
1223 char *local_got_tls_type;
1226 #define elf32_arm_tdata(abfd) \
1227 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
1229 #define elf32_arm_local_got_tls_type(abfd) \
1230 (elf32_arm_tdata (abfd)->local_got_tls_type)
1233 elf32_arm_mkobject (bfd *abfd)
1235 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
1236 abfd->tdata.any = bfd_zalloc (abfd, amt);
1237 if (abfd->tdata.any == NULL)
1242 /* The ARM linker needs to keep track of the number of relocs that it
1243 decides to copy in check_relocs for each symbol. This is so that
1244 it can discard PC relative relocs if it doesn't need them when
1245 linking with -Bsymbolic. We store the information in a field
1246 extending the regular ELF linker hash table. */
1248 /* This structure keeps track of the number of relocs we have copied
1249 for a given symbol. */
1250 struct elf32_arm_relocs_copied
1253 struct elf32_arm_relocs_copied * next;
1254 /* A section in dynobj. */
1256 /* Number of relocs copied in this section. */
1257 bfd_size_type count;
1258 /* Number of PC-relative relocs copied in this section. */
1259 bfd_size_type pc_count;
1262 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
1264 /* Arm ELF linker hash entry. */
1265 struct elf32_arm_link_hash_entry
1267 struct elf_link_hash_entry root;
1269 /* Number of PC relative relocs copied for this symbol. */
1270 struct elf32_arm_relocs_copied * relocs_copied;
1272 /* We reference count Thumb references to a PLT entry separately,
1273 so that we can emit the Thumb trampoline only if needed. */
1274 bfd_signed_vma plt_thumb_refcount;
1276 /* Since PLT entries have variable size if the Thumb prologue is
1277 used, we need to record the index into .got.plt instead of
1278 recomputing it from the PLT offset. */
1279 bfd_signed_vma plt_got_offset;
1281 #define GOT_UNKNOWN 0
1282 #define GOT_NORMAL 1
1283 #define GOT_TLS_GD 2
1284 #define GOT_TLS_IE 4
1285 unsigned char tls_type;
1288 /* Traverse an arm ELF linker hash table. */
1289 #define elf32_arm_link_hash_traverse(table, func, info) \
1290 (elf_link_hash_traverse \
1292 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1295 /* Get the ARM elf linker hash table from a link_info structure. */
1296 #define elf32_arm_hash_table(info) \
1297 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1299 /* ARM ELF linker hash table. */
1300 struct elf32_arm_link_hash_table
1302 /* The main hash table. */
1303 struct elf_link_hash_table root;
1305 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1306 bfd_size_type thumb_glue_size;
1308 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1309 bfd_size_type arm_glue_size;
1311 /* An arbitrary input BFD chosen to hold the glue sections. */
1312 bfd * bfd_of_glue_owner;
1314 /* Nonzero to output a BE8 image. */
1317 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1318 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1321 /* The relocation to use for R_ARM_TARGET2 relocations. */
1324 /* Nonzero to fix BX instructions for ARMv4 targets. */
1327 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
1330 /* The number of bytes in the initial entry in the PLT. */
1331 bfd_size_type plt_header_size;
1333 /* The number of bytes in the subsequent PLT etries. */
1334 bfd_size_type plt_entry_size;
1336 /* True if the target system is Symbian OS. */
1339 /* True if the target uses REL relocations. */
1342 /* Short-cuts to get to dynamic linker sections. */
1351 /* Data for R_ARM_TLS_LDM32 relocations. */
1353 bfd_signed_vma refcount;
1357 /* Small local sym to section mapping cache. */
1358 struct sym_sec_cache sym_sec;
1360 /* For convenience in allocate_dynrelocs. */
1364 /* Create an entry in an ARM ELF linker hash table. */
1366 static struct bfd_hash_entry *
1367 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1368 struct bfd_hash_table * table,
1369 const char * string)
1371 struct elf32_arm_link_hash_entry * ret =
1372 (struct elf32_arm_link_hash_entry *) entry;
1374 /* Allocate the structure if it has not already been allocated by a
1376 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1377 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1379 return (struct bfd_hash_entry *) ret;
1381 /* Call the allocation method of the superclass. */
1382 ret = ((struct elf32_arm_link_hash_entry *)
1383 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1387 ret->relocs_copied = NULL;
1388 ret->tls_type = GOT_UNKNOWN;
1389 ret->plt_thumb_refcount = 0;
1390 ret->plt_got_offset = -1;
1393 return (struct bfd_hash_entry *) ret;
1396 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1397 shortcuts to them in our hash table. */
1400 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1402 struct elf32_arm_link_hash_table *htab;
1404 htab = elf32_arm_hash_table (info);
1405 /* BPABI objects never have a GOT, or associated sections. */
1406 if (htab->symbian_p)
1409 if (! _bfd_elf_create_got_section (dynobj, info))
1412 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1413 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1414 if (!htab->sgot || !htab->sgotplt)
1417 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1418 if (htab->srelgot == NULL
1419 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1420 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1421 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1423 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1428 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1429 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1433 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1435 struct elf32_arm_link_hash_table *htab;
1437 htab = elf32_arm_hash_table (info);
1438 if (!htab->sgot && !create_got_section (dynobj, info))
1441 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1444 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1445 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1446 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1448 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1453 || (!info->shared && !htab->srelbss))
1459 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1462 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1463 struct elf_link_hash_entry *dir,
1464 struct elf_link_hash_entry *ind)
1466 struct elf32_arm_link_hash_entry *edir, *eind;
1468 edir = (struct elf32_arm_link_hash_entry *) dir;
1469 eind = (struct elf32_arm_link_hash_entry *) ind;
1471 if (eind->relocs_copied != NULL)
1473 if (edir->relocs_copied != NULL)
1475 struct elf32_arm_relocs_copied **pp;
1476 struct elf32_arm_relocs_copied *p;
1478 if (ind->root.type == bfd_link_hash_indirect)
1481 /* Add reloc counts against the weak sym to the strong sym
1482 list. Merge any entries against the same section. */
1483 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1485 struct elf32_arm_relocs_copied *q;
1487 for (q = edir->relocs_copied; q != NULL; q = q->next)
1488 if (q->section == p->section)
1490 q->pc_count += p->pc_count;
1491 q->count += p->count;
1498 *pp = edir->relocs_copied;
1501 edir->relocs_copied = eind->relocs_copied;
1502 eind->relocs_copied = NULL;
1505 /* If the direct symbol already has an associated PLT entry, the
1506 indirect symbol should not. If it doesn't, swap refcount information
1507 from the indirect symbol. */
1508 if (edir->plt_thumb_refcount == 0)
1510 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1511 eind->plt_thumb_refcount = 0;
1514 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1516 if (ind->root.type == bfd_link_hash_indirect
1517 && dir->got.refcount <= 0)
1519 edir->tls_type = eind->tls_type;
1520 eind->tls_type = GOT_UNKNOWN;
1523 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1526 /* Create an ARM elf linker hash table. */
1528 static struct bfd_link_hash_table *
1529 elf32_arm_link_hash_table_create (bfd *abfd)
1531 struct elf32_arm_link_hash_table *ret;
1532 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1534 ret = bfd_malloc (amt);
1538 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1539 elf32_arm_link_hash_newfunc))
1546 ret->sgotplt = NULL;
1547 ret->srelgot = NULL;
1549 ret->srelplt = NULL;
1550 ret->sdynbss = NULL;
1551 ret->srelbss = NULL;
1552 ret->thumb_glue_size = 0;
1553 ret->arm_glue_size = 0;
1554 ret->bfd_of_glue_owner = NULL;
1555 ret->byteswap_code = 0;
1556 ret->target1_is_rel = 0;
1557 ret->target2_reloc = R_ARM_NONE;
1558 #ifdef FOUR_WORD_PLT
1559 ret->plt_header_size = 16;
1560 ret->plt_entry_size = 16;
1562 ret->plt_header_size = 20;
1563 ret->plt_entry_size = 12;
1569 ret->sym_sec.abfd = NULL;
1571 ret->tls_ldm_got.refcount = 0;
1573 return &ret->root.root;
1576 /* Locate the Thumb encoded calling stub for NAME. */
1578 static struct elf_link_hash_entry *
1579 find_thumb_glue (struct bfd_link_info *link_info,
1584 struct elf_link_hash_entry *hash;
1585 struct elf32_arm_link_hash_table *hash_table;
1587 /* We need a pointer to the armelf specific hash table. */
1588 hash_table = elf32_arm_hash_table (link_info);
1590 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1591 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1593 BFD_ASSERT (tmp_name);
1595 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1597 hash = elf_link_hash_lookup
1598 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1601 /* xgettext:c-format */
1602 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1603 input_bfd, tmp_name, name);
1610 /* Locate the ARM encoded calling stub for NAME. */
1612 static struct elf_link_hash_entry *
1613 find_arm_glue (struct bfd_link_info *link_info,
1618 struct elf_link_hash_entry *myh;
1619 struct elf32_arm_link_hash_table *hash_table;
1621 /* We need a pointer to the elfarm specific hash table. */
1622 hash_table = elf32_arm_hash_table (link_info);
1624 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1625 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1627 BFD_ASSERT (tmp_name);
1629 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1631 myh = elf_link_hash_lookup
1632 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1635 /* xgettext:c-format */
1636 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1637 input_bfd, tmp_name, name);
1644 /* ARM->Thumb glue (static images):
1648 ldr r12, __func_addr
1651 .word func @ behave as if you saw a ARM_32 reloc.
1653 (relocatable images)
1656 ldr r12, __func_offset
1663 #define ARM2THUMB_STATIC_GLUE_SIZE 12
1664 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1665 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1666 static const insn32 a2t3_func_addr_insn = 0x00000001;
1668 #define ARM2THUMB_PIC_GLUE_SIZE 16
1669 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
1670 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
1671 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
1673 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1677 __func_from_thumb: __func_from_thumb:
1679 nop ldr r6, __func_addr
1681 __func_change_to_arm: bx r6
1683 __func_back_to_thumb:
1689 #define THUMB2ARM_GLUE_SIZE 8
1690 static const insn16 t2a1_bx_pc_insn = 0x4778;
1691 static const insn16 t2a2_noop_insn = 0x46c0;
1692 static const insn32 t2a3_b_insn = 0xea000000;
1694 #ifndef ELFARM_NABI_C_INCLUDED
1696 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
1700 struct elf32_arm_link_hash_table * globals;
1702 globals = elf32_arm_hash_table (info);
1704 BFD_ASSERT (globals != NULL);
1706 if (globals->arm_glue_size != 0)
1708 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1710 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1711 ARM2THUMB_GLUE_SECTION_NAME);
1713 BFD_ASSERT (s != NULL);
1715 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
1717 s->size = globals->arm_glue_size;
1721 if (globals->thumb_glue_size != 0)
1723 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1725 s = bfd_get_section_by_name
1726 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1728 BFD_ASSERT (s != NULL);
1730 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
1732 s->size = globals->thumb_glue_size;
1740 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1741 struct elf_link_hash_entry * h)
1743 const char * name = h->root.root.string;
1746 struct elf_link_hash_entry * myh;
1747 struct bfd_link_hash_entry * bh;
1748 struct elf32_arm_link_hash_table * globals;
1751 globals = elf32_arm_hash_table (link_info);
1753 BFD_ASSERT (globals != NULL);
1754 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1756 s = bfd_get_section_by_name
1757 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1759 BFD_ASSERT (s != NULL);
1761 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1763 BFD_ASSERT (tmp_name);
1765 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1767 myh = elf_link_hash_lookup
1768 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
1772 /* We've already seen this guy. */
1777 /* The only trick here is using hash_table->arm_glue_size as the value.
1778 Even though the section isn't allocated yet, this is where we will be
1781 val = globals->arm_glue_size + 1;
1782 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1783 tmp_name, BSF_GLOBAL, s, val,
1784 NULL, TRUE, FALSE, &bh);
1786 myh = (struct elf_link_hash_entry *) bh;
1787 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1788 myh->forced_local = 1;
1792 if ((link_info->shared || globals->root.is_relocatable_executable))
1793 globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE;
1795 globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE;
1801 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1802 struct elf_link_hash_entry *h)
1804 const char *name = h->root.root.string;
1807 struct elf_link_hash_entry *myh;
1808 struct bfd_link_hash_entry *bh;
1809 struct elf32_arm_link_hash_table *hash_table;
1812 hash_table = elf32_arm_hash_table (link_info);
1814 BFD_ASSERT (hash_table != NULL);
1815 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1817 s = bfd_get_section_by_name
1818 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1820 BFD_ASSERT (s != NULL);
1822 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1823 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1825 BFD_ASSERT (tmp_name);
1827 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1829 myh = elf_link_hash_lookup
1830 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1834 /* We've already seen this guy. */
1840 val = hash_table->thumb_glue_size + 1;
1841 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1842 tmp_name, BSF_GLOBAL, s, val,
1843 NULL, TRUE, FALSE, &bh);
1845 /* If we mark it 'Thumb', the disassembler will do a better job. */
1846 myh = (struct elf_link_hash_entry *) bh;
1847 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
1848 myh->forced_local = 1;
1852 #define CHANGE_TO_ARM "__%s_change_to_arm"
1853 #define BACK_FROM_ARM "__%s_back_from_arm"
1855 /* Allocate another symbol to mark where we switch to Arm mode. */
1856 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1857 + strlen (CHANGE_TO_ARM) + 1);
1859 BFD_ASSERT (tmp_name);
1861 sprintf (tmp_name, CHANGE_TO_ARM, name);
1864 val = hash_table->thumb_glue_size + 4,
1865 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1866 tmp_name, BSF_LOCAL, s, val,
1867 NULL, TRUE, FALSE, &bh);
1871 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1876 /* Add the glue sections to ABFD. This function is called from the
1877 linker scripts in ld/emultempl/{armelf}.em. */
1880 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1881 struct bfd_link_info *info)
1886 /* If we are only performing a partial
1887 link do not bother adding the glue. */
1888 if (info->relocatable)
1891 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1895 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1896 will prevent elf_link_input_bfd() from processing the contents
1898 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
1900 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1903 || !bfd_set_section_flags (abfd, sec, flags)
1904 || !bfd_set_section_alignment (abfd, sec, 2))
1907 /* Set the gc mark to prevent the section from being removed by garbage
1908 collection, despite the fact that no relocs refer to this section. */
1912 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1916 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1917 | SEC_CODE | SEC_READONLY;
1919 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1922 || !bfd_set_section_flags (abfd, sec, flags)
1923 || !bfd_set_section_alignment (abfd, sec, 2))
1932 /* Select a BFD to be used to hold the sections used by the glue code.
1933 This function is called from the linker scripts in ld/emultempl/
1937 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
1939 struct elf32_arm_link_hash_table *globals;
1941 /* If we are only performing a partial link
1942 do not bother getting a bfd to hold the glue. */
1943 if (info->relocatable)
1946 /* Make sure we don't attach the glue sections to a dynamic object. */
1947 BFD_ASSERT (!(abfd->flags & DYNAMIC));
1949 globals = elf32_arm_hash_table (info);
1951 BFD_ASSERT (globals != NULL);
1953 if (globals->bfd_of_glue_owner != NULL)
1956 /* Save the bfd for later use. */
1957 globals->bfd_of_glue_owner = abfd;
1963 bfd_elf32_arm_process_before_allocation (bfd *abfd,
1964 struct bfd_link_info *link_info,
1967 Elf_Internal_Shdr *symtab_hdr;
1968 Elf_Internal_Rela *internal_relocs = NULL;
1969 Elf_Internal_Rela *irel, *irelend;
1970 bfd_byte *contents = NULL;
1973 struct elf32_arm_link_hash_table *globals;
1975 /* If we are only performing a partial link do not bother
1976 to construct any glue. */
1977 if (link_info->relocatable)
1980 /* Here we have a bfd that is to be included on the link. We have a hook
1981 to do reloc rummaging, before section sizes are nailed down. */
1982 globals = elf32_arm_hash_table (link_info);
1984 BFD_ASSERT (globals != NULL);
1985 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1987 if (byteswap_code && !bfd_big_endian (abfd))
1989 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1993 globals->byteswap_code = byteswap_code;
1995 /* Rummage around all the relocs and map the glue vectors. */
1996 sec = abfd->sections;
2001 for (; sec != NULL; sec = sec->next)
2003 if (sec->reloc_count == 0)
2006 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2008 /* Load the relocs. */
2010 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
2011 (Elf_Internal_Rela *) NULL, FALSE);
2013 if (internal_relocs == NULL)
2016 irelend = internal_relocs + sec->reloc_count;
2017 for (irel = internal_relocs; irel < irelend; irel++)
2020 unsigned long r_index;
2022 struct elf_link_hash_entry *h;
2024 r_type = ELF32_R_TYPE (irel->r_info);
2025 r_index = ELF32_R_SYM (irel->r_info);
2027 /* These are the only relocation types we care about. */
2028 if ( r_type != R_ARM_PC24
2029 && r_type != R_ARM_PLT32
2031 && r_type != R_ARM_CALL
2032 && r_type != R_ARM_JUMP24
2034 && r_type != R_ARM_THM_PC22)
2037 /* Get the section contents if we haven't done so already. */
2038 if (contents == NULL)
2040 /* Get cached copy if it exists. */
2041 if (elf_section_data (sec)->this_hdr.contents != NULL)
2042 contents = elf_section_data (sec)->this_hdr.contents;
2045 /* Go get them off disk. */
2046 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2051 /* If the relocation is not against a symbol it cannot concern us. */
2054 /* We don't care about local symbols. */
2055 if (r_index < symtab_hdr->sh_info)
2058 /* This is an external symbol. */
2059 r_index -= symtab_hdr->sh_info;
2060 h = (struct elf_link_hash_entry *)
2061 elf_sym_hashes (abfd)[r_index];
2063 /* If the relocation is against a static symbol it must be within
2064 the current section and so cannot be a cross ARM/Thumb relocation. */
2068 /* If the call will go through a PLT entry then we do not need
2070 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
2080 /* This one is a call from arm code. We need to look up
2081 the target of the call. If it is a thumb target, we
2083 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
2084 record_arm_to_thumb_glue (link_info, h);
2087 case R_ARM_THM_PC22:
2088 /* This one is a call from thumb code. We look
2089 up the target of the call. If it is not a thumb
2090 target, we insert glue. */
2091 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
2092 record_thumb_to_arm_glue (link_info, h);
2100 if (contents != NULL
2101 && elf_section_data (sec)->this_hdr.contents != contents)
2105 if (internal_relocs != NULL
2106 && elf_section_data (sec)->relocs != internal_relocs)
2107 free (internal_relocs);
2108 internal_relocs = NULL;
2114 if (contents != NULL
2115 && elf_section_data (sec)->this_hdr.contents != contents)
2117 if (internal_relocs != NULL
2118 && elf_section_data (sec)->relocs != internal_relocs)
2119 free (internal_relocs);
2127 /* Set target relocation values needed during linking. */
2130 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
2132 char * target2_type,
2136 struct elf32_arm_link_hash_table *globals;
2138 globals = elf32_arm_hash_table (link_info);
2140 globals->target1_is_rel = target1_is_rel;
2141 if (strcmp (target2_type, "rel") == 0)
2142 globals->target2_reloc = R_ARM_REL32;
2143 else if (strcmp (target2_type, "abs") == 0)
2144 globals->target2_reloc = R_ARM_ABS32;
2145 else if (strcmp (target2_type, "got-rel") == 0)
2146 globals->target2_reloc = R_ARM_GOT_PREL;
2149 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
2152 globals->fix_v4bx = fix_v4bx;
2153 globals->use_blx |= use_blx;
2157 /* The thumb form of a long branch is a bit finicky, because the offset
2158 encoding is split over two fields, each in it's own instruction. They
2159 can occur in any order. So given a thumb form of long branch, and an
2160 offset, insert the offset into the thumb branch and return finished
2163 It takes two thumb instructions to encode the target address. Each has
2164 11 bits to invest. The upper 11 bits are stored in one (identified by
2165 H-0.. see below), the lower 11 bits are stored in the other (identified
2168 Combine together and shifted left by 1 (it's a half word address) and
2172 H-0, upper address-0 = 000
2174 H-1, lower address-0 = 800
2176 They can be ordered either way, but the arm tools I've seen always put
2179 XXX: Actually the order does matter. The second instruction (H-1)
2180 moves the computed address into the PC, so it must be the second one
2181 in the sequence. The problem, however is that whilst little endian code
2182 stores the instructions in HI then LOW order, big endian code does the
2185 #define LOW_HI_ORDER 0xF800F000
2186 #define HI_LOW_ORDER 0xF000F800
2189 insert_thumb_branch (insn32 br_insn, int rel_off)
2191 unsigned int low_bits;
2192 unsigned int high_bits;
2194 BFD_ASSERT ((rel_off & 1) != 1);
2196 rel_off >>= 1; /* Half word aligned address. */
2197 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2198 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2200 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2201 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2202 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2203 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2206 abort (); /* Error - not a valid branch instruction form. */
2211 /* Thumb code calling an ARM function. */
2214 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2218 asection * input_section,
2219 bfd_byte * hit_data,
2222 bfd_signed_vma addend,
2227 unsigned long int tmp;
2228 long int ret_offset;
2229 struct elf_link_hash_entry * myh;
2230 struct elf32_arm_link_hash_table * globals;
2232 myh = find_thumb_glue (info, name, input_bfd);
2236 globals = elf32_arm_hash_table (info);
2238 BFD_ASSERT (globals != NULL);
2239 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2241 my_offset = myh->root.u.def.value;
2243 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2244 THUMB2ARM_GLUE_SECTION_NAME);
2246 BFD_ASSERT (s != NULL);
2247 BFD_ASSERT (s->contents != NULL);
2248 BFD_ASSERT (s->output_section != NULL);
2250 if ((my_offset & 0x01) == 0x01)
2253 && sym_sec->owner != NULL
2254 && !INTERWORK_FLAG (sym_sec->owner))
2256 (*_bfd_error_handler)
2257 (_("%B(%s): warning: interworking not enabled.\n"
2258 " first occurrence: %B: thumb call to arm"),
2259 sym_sec->owner, input_bfd, name);
2265 myh->root.u.def.value = my_offset;
2267 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2268 s->contents + my_offset);
2270 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2271 s->contents + my_offset + 2);
2274 /* Address of destination of the stub. */
2275 ((bfd_signed_vma) val)
2277 /* Offset from the start of the current section
2278 to the start of the stubs. */
2280 /* Offset of the start of this stub from the start of the stubs. */
2282 /* Address of the start of the current section. */
2283 + s->output_section->vma)
2284 /* The branch instruction is 4 bytes into the stub. */
2286 /* ARM branches work from the pc of the instruction + 8. */
2289 bfd_put_32 (output_bfd,
2290 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2291 s->contents + my_offset + 4);
2294 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2296 /* Now go back and fix up the original BL insn to point to here. */
2298 /* Address of where the stub is located. */
2299 (s->output_section->vma + s->output_offset + my_offset)
2300 /* Address of where the BL is located. */
2301 - (input_section->output_section->vma + input_section->output_offset
2303 /* Addend in the relocation. */
2305 /* Biassing for PC-relative addressing. */
2308 tmp = bfd_get_32 (input_bfd, hit_data
2309 - input_section->vma);
2311 bfd_put_32 (output_bfd,
2312 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2313 hit_data - input_section->vma);
2318 /* Arm code calling a Thumb function. */
2321 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2325 asection * input_section,
2326 bfd_byte * hit_data,
2329 bfd_signed_vma addend,
2332 unsigned long int tmp;
2335 long int ret_offset;
2336 struct elf_link_hash_entry * myh;
2337 struct elf32_arm_link_hash_table * globals;
2339 myh = find_arm_glue (info, name, input_bfd);
2343 globals = elf32_arm_hash_table (info);
2345 BFD_ASSERT (globals != NULL);
2346 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2348 my_offset = myh->root.u.def.value;
2349 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2350 ARM2THUMB_GLUE_SECTION_NAME);
2351 BFD_ASSERT (s != NULL);
2352 BFD_ASSERT (s->contents != NULL);
2353 BFD_ASSERT (s->output_section != NULL);
2355 if ((my_offset & 0x01) == 0x01)
2358 && sym_sec->owner != NULL
2359 && !INTERWORK_FLAG (sym_sec->owner))
2361 (*_bfd_error_handler)
2362 (_("%B(%s): warning: interworking not enabled.\n"
2363 " first occurrence: %B: arm call to thumb"),
2364 sym_sec->owner, input_bfd, name);
2368 myh->root.u.def.value = my_offset;
2370 if ((info->shared || globals->root.is_relocatable_executable))
2372 /* For relocatable objects we can't use absolute addresses,
2373 so construct the address from a relative offset. */
2374 /* TODO: If the offset is small it's probably worth
2375 constructing the address with adds. */
2376 bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn,
2377 s->contents + my_offset);
2378 bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn,
2379 s->contents + my_offset + 4);
2380 bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
2381 s->contents + my_offset + 8);
2382 /* Adjust the offset by 4 for the position of the add,
2383 and 8 for the pipeline offset. */
2384 ret_offset = (val - (s->output_offset
2385 + s->output_section->vma
2388 bfd_put_32 (output_bfd, ret_offset,
2389 s->contents + my_offset + 12);
2393 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2394 s->contents + my_offset);
2396 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2397 s->contents + my_offset + 4);
2399 /* It's a thumb address. Add the low order bit. */
2400 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2401 s->contents + my_offset + 8);
2405 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2407 tmp = bfd_get_32 (input_bfd, hit_data);
2408 tmp = tmp & 0xFF000000;
2410 /* Somehow these are both 4 too far, so subtract 8. */
2411 ret_offset = (s->output_offset
2413 + s->output_section->vma
2414 - (input_section->output_offset
2415 + input_section->output_section->vma
2419 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2421 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2428 /* Some relocations map to different relocations depending on the
2429 target. Return the real relocation. */
2431 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2437 if (globals->target1_is_rel)
2443 return globals->target2_reloc;
2449 #endif /* OLD_ARM_ABI */
2452 /* Return the base VMA address which should be subtracted from real addresses
2453 when resolving @dtpoff relocation.
2454 This is PT_TLS segment p_vaddr. */
2457 dtpoff_base (struct bfd_link_info *info)
2459 /* If tls_sec is NULL, we should have signalled an error already. */
2460 if (elf_hash_table (info)->tls_sec == NULL)
2462 return elf_hash_table (info)->tls_sec->vma;
2465 /* Return the relocation value for @tpoff relocation
2466 if STT_TLS virtual address is ADDRESS. */
2469 tpoff (struct bfd_link_info *info, bfd_vma address)
2471 struct elf_link_hash_table *htab = elf_hash_table (info);
2474 /* If tls_sec is NULL, we should have signalled an error already. */
2475 if (htab->tls_sec == NULL)
2477 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
2478 return address - htab->tls_sec->vma + base;
2481 /* Perform a relocation as part of a final link. */
2483 static bfd_reloc_status_type
2484 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2487 asection * input_section,
2488 bfd_byte * contents,
2489 Elf_Internal_Rela * rel,
2491 struct bfd_link_info * info,
2493 const char * sym_name,
2495 struct elf_link_hash_entry * h,
2496 bfd_boolean * unresolved_reloc_p)
2498 unsigned long r_type = howto->type;
2499 unsigned long r_symndx;
2500 bfd_byte * hit_data = contents + rel->r_offset;
2501 bfd * dynobj = NULL;
2502 Elf_Internal_Shdr * symtab_hdr;
2503 struct elf_link_hash_entry ** sym_hashes;
2504 bfd_vma * local_got_offsets;
2505 asection * sgot = NULL;
2506 asection * splt = NULL;
2507 asection * sreloc = NULL;
2509 bfd_signed_vma signed_addend;
2510 struct elf32_arm_link_hash_table * globals;
2512 globals = elf32_arm_hash_table (info);
2515 /* Some relocation type map to different relocations depending on the
2516 target. We pick the right one here. */
2517 r_type = arm_real_reloc_type (globals, r_type);
2518 if (r_type != howto->type)
2519 howto = elf32_arm_howto_from_type (r_type);
2520 #endif /* OLD_ARM_ABI */
2522 /* If the start address has been set, then set the EF_ARM_HASENTRY
2523 flag. Setting this more than once is redundant, but the cost is
2524 not too high, and it keeps the code simple.
2526 The test is done here, rather than somewhere else, because the
2527 start address is only set just before the final link commences.
2529 Note - if the user deliberately sets a start address of 0, the
2530 flag will not be set. */
2531 if (bfd_get_start_address (output_bfd) != 0)
2532 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2534 dynobj = elf_hash_table (info)->dynobj;
2537 sgot = bfd_get_section_by_name (dynobj, ".got");
2538 splt = bfd_get_section_by_name (dynobj, ".plt");
2540 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2541 sym_hashes = elf_sym_hashes (input_bfd);
2542 local_got_offsets = elf_local_got_offsets (input_bfd);
2543 r_symndx = ELF32_R_SYM (rel->r_info);
2545 if (globals->use_rel)
2547 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2549 if (addend & ((howto->src_mask + 1) >> 1))
2552 signed_addend &= ~ howto->src_mask;
2553 signed_addend |= addend;
2556 signed_addend = addend;
2559 addend = signed_addend = rel->r_addend;
2564 /* We don't need to find a value for this symbol. It's just a
2566 *unresolved_reloc_p = FALSE;
2567 return bfd_reloc_ok;
2579 /* r_symndx will be zero only for relocs against symbols
2580 from removed linkonce sections, or sections discarded by
2583 return bfd_reloc_ok;
2585 /* Handle relocations which should use the PLT entry. ABS32/REL32
2586 will use the symbol's value, which may point to a PLT entry, but we
2587 don't need to handle that here. If we created a PLT entry, all
2588 branches in this object should go to it. */
2589 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2592 && h->plt.offset != (bfd_vma) -1)
2594 /* If we've created a .plt section, and assigned a PLT entry to
2595 this function, it should not be known to bind locally. If
2596 it were, we would have cleared the PLT entry. */
2597 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2599 value = (splt->output_section->vma
2600 + splt->output_offset
2602 *unresolved_reloc_p = FALSE;
2603 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2604 contents, rel->r_offset, value,
2608 /* When generating a shared object or relocatable executable, these
2609 relocations are copied into the output file to be resolved at
2611 if ((info->shared || globals->root.is_relocatable_executable)
2612 && (input_section->flags & SEC_ALLOC)
2613 && (r_type != R_ARM_REL32
2614 || !SYMBOL_CALLS_LOCAL (info, h))
2616 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2617 || h->root.type != bfd_link_hash_undefweak)
2618 && r_type != R_ARM_PC24
2620 && r_type != R_ARM_CALL
2621 && r_type != R_ARM_JUMP24
2622 && r_type != R_ARM_PREL31
2624 && r_type != R_ARM_PLT32)
2626 Elf_Internal_Rela outrel;
2628 bfd_boolean skip, relocate;
2630 *unresolved_reloc_p = FALSE;
2636 name = (bfd_elf_string_from_elf_section
2638 elf_elfheader (input_bfd)->e_shstrndx,
2639 elf_section_data (input_section)->rel_hdr.sh_name));
2641 return bfd_reloc_notsupported;
2643 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2644 && strcmp (bfd_get_section_name (input_bfd,
2648 sreloc = bfd_get_section_by_name (dynobj, name);
2649 BFD_ASSERT (sreloc != NULL);
2656 _bfd_elf_section_offset (output_bfd, info, input_section,
2658 if (outrel.r_offset == (bfd_vma) -1)
2660 else if (outrel.r_offset == (bfd_vma) -2)
2661 skip = TRUE, relocate = TRUE;
2662 outrel.r_offset += (input_section->output_section->vma
2663 + input_section->output_offset);
2666 memset (&outrel, 0, sizeof outrel);
2671 || !h->def_regular))
2672 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2677 /* This symbol is local, or marked to become local. */
2679 if (sym_flags == STT_ARM_TFUNC)
2681 if (globals->symbian_p)
2683 /* On Symbian OS, the data segment and text segement
2684 can be relocated independently. Therefore, we
2685 must indicate the segment to which this
2686 relocation is relative. The BPABI allows us to
2687 use any symbol in the right segment; we just use
2688 the section symbol as it is convenient. (We
2689 cannot use the symbol given by "h" directly as it
2690 will not appear in the dynamic symbol table.) */
2691 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2692 BFD_ASSERT (symbol != 0);
2695 /* On SVR4-ish systems, the dynamic loader cannot
2696 relocate the text and data segments independently,
2697 so the symbol does not matter. */
2699 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2702 loc = sreloc->contents;
2703 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2704 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2706 /* If this reloc is against an external symbol, we do not want to
2707 fiddle with the addend. Otherwise, we need to include the symbol
2708 value so that it becomes an addend for the dynamic reloc. */
2710 return bfd_reloc_ok;
2712 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2713 contents, rel->r_offset, value,
2716 else switch (r_type)
2719 case R_ARM_XPC25: /* Arm BLX instruction. */
2723 case R_ARM_PC24: /* Arm B/BL instruction */
2726 if (r_type == R_ARM_XPC25)
2728 /* Check for Arm calling Arm function. */
2729 /* FIXME: Should we translate the instruction into a BL
2730 instruction instead ? */
2731 if (sym_flags != STT_ARM_TFUNC)
2732 (*_bfd_error_handler)
2733 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2735 h ? h->root.root.string : "(local)");
2740 /* Check for Arm calling Thumb function. */
2741 if (sym_flags == STT_ARM_TFUNC)
2743 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2744 output_bfd, input_section,
2745 hit_data, sym_sec, rel->r_offset,
2746 signed_addend, value);
2747 return bfd_reloc_ok;
2751 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2753 S is the address of the symbol in the relocation.
2754 P is address of the instruction being relocated.
2755 A is the addend (extracted from the instruction) in bytes.
2757 S is held in 'value'.
2758 P is the base address of the section containing the
2759 instruction plus the offset of the reloc into that
2761 (input_section->output_section->vma +
2762 input_section->output_offset +
2764 A is the addend, converted into bytes, ie:
2767 Note: None of these operations have knowledge of the pipeline
2768 size of the processor, thus it is up to the assembler to
2769 encode this information into the addend. */
2770 value -= (input_section->output_section->vma
2771 + input_section->output_offset);
2772 value -= rel->r_offset;
2773 if (globals->use_rel)
2774 value += (signed_addend << howto->size);
2776 /* RELA addends do not have to be adjusted by howto->size. */
2777 value += signed_addend;
2779 signed_addend = value;
2780 signed_addend >>= howto->rightshift;
2782 /* It is not an error for an undefined weak reference to be
2783 out of range. Any program that branches to such a symbol
2784 is going to crash anyway, so there is no point worrying
2785 about getting the destination exactly right. */
2786 if (! h || h->root.type != bfd_link_hash_undefweak)
2788 /* Perform a signed range check. */
2789 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2790 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2791 return bfd_reloc_overflow;
2795 /* If necessary set the H bit in the BLX instruction. */
2796 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2797 value = (signed_addend & howto->dst_mask)
2798 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2802 value = (signed_addend & howto->dst_mask)
2803 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2808 if (sym_flags == STT_ARM_TFUNC)
2813 value -= (input_section->output_section->vma
2814 + input_section->output_offset + rel->r_offset);
2820 value -= (input_section->output_section->vma
2821 + input_section->output_offset + rel->r_offset);
2822 value += signed_addend;
2823 if (! h || h->root.type != bfd_link_hash_undefweak)
2825 /* Check for overflow */
2826 if ((value ^ (value >> 1)) & (1 << 30))
2827 return bfd_reloc_overflow;
2829 value &= 0x7fffffff;
2830 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2831 if (sym_flags == STT_ARM_TFUNC)
2837 bfd_put_32 (input_bfd, value, hit_data);
2838 return bfd_reloc_ok;
2842 if ((long) value > 0x7f || (long) value < -0x80)
2843 return bfd_reloc_overflow;
2845 bfd_put_8 (input_bfd, value, hit_data);
2846 return bfd_reloc_ok;
2851 if ((long) value > 0x7fff || (long) value < -0x8000)
2852 return bfd_reloc_overflow;
2854 bfd_put_16 (input_bfd, value, hit_data);
2855 return bfd_reloc_ok;
2858 /* Support ldr and str instruction for the arm */
2859 /* Also thumb b (unconditional branch). ??? Really? */
2862 if ((long) value > 0x7ff || (long) value < -0x800)
2863 return bfd_reloc_overflow;
2865 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2866 bfd_put_32 (input_bfd, value, hit_data);
2867 return bfd_reloc_ok;
2869 case R_ARM_THM_ABS5:
2870 /* Support ldr and str instructions for the thumb. */
2871 if (globals->use_rel)
2873 /* Need to refetch addend. */
2874 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2875 /* ??? Need to determine shift amount from operand size. */
2876 addend >>= howto->rightshift;
2880 /* ??? Isn't value unsigned? */
2881 if ((long) value > 0x1f || (long) value < -0x10)
2882 return bfd_reloc_overflow;
2884 /* ??? Value needs to be properly shifted into place first. */
2885 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2886 bfd_put_16 (input_bfd, value, hit_data);
2887 return bfd_reloc_ok;
2890 case R_ARM_THM_XPC22:
2892 case R_ARM_THM_PC22:
2893 /* Thumb BL (branch long instruction). */
2896 bfd_boolean overflow = FALSE;
2897 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2898 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2899 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2900 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2902 bfd_signed_vma signed_check;
2903 bfd_boolean thumb_plt_call = FALSE;
2905 /* Need to refetch the addend and squish the two 11 bit pieces
2907 if (globals->use_rel)
2909 bfd_vma upper = upper_insn & 0x7ff;
2910 bfd_vma lower = lower_insn & 0x7ff;
2911 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2912 addend = (upper << 12) | (lower << 1);
2913 signed_addend = addend;
2916 if (r_type == R_ARM_THM_XPC22)
2918 /* Check for Thumb to Thumb call. */
2919 /* FIXME: Should we translate the instruction into a BL
2920 instruction instead ? */
2921 if (sym_flags == STT_ARM_TFUNC)
2922 (*_bfd_error_handler)
2923 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2925 h ? h->root.root.string : "(local)");
2930 /* If it is not a call to Thumb, assume call to Arm.
2931 If it is a call relative to a section name, then it is not a
2932 function call at all, but rather a long jump. Calls through
2933 the PLT do not require stubs. */
2934 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2935 && (h == NULL || splt == NULL
2936 || h->plt.offset == (bfd_vma) -1))
2938 if (elf32_thumb_to_arm_stub
2939 (info, sym_name, input_bfd, output_bfd, input_section,
2940 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2941 return bfd_reloc_ok;
2943 return bfd_reloc_dangerous;
2947 /* Handle calls via the PLT. */
2948 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2950 value = (splt->output_section->vma
2951 + splt->output_offset
2953 if (globals->use_blx)
2955 /* If the Thumb BLX instruction is available, convert the
2956 BL to a BLX instruction to call the ARM-mode PLT entry. */
2957 if ((lower_insn & (0x3 << 11)) == 0x3 << 11)
2959 lower_insn = (lower_insn & ~(0x3 << 11)) | 0x1 << 11;
2960 thumb_plt_call = TRUE;
2964 /* Target the Thumb stub before the ARM PLT entry. */
2965 value -= PLT_THUMB_STUB_SIZE;
2966 *unresolved_reloc_p = FALSE;
2969 relocation = value + signed_addend;
2971 relocation -= (input_section->output_section->vma
2972 + input_section->output_offset
2975 check = relocation >> howto->rightshift;
2977 /* If this is a signed value, the rightshift just dropped
2978 leading 1 bits (assuming twos complement). */
2979 if ((bfd_signed_vma) relocation >= 0)
2980 signed_check = check;
2982 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2984 /* Assumes two's complement. */
2985 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2989 if ((r_type == R_ARM_THM_XPC22
2990 && ((lower_insn & 0x1800) == 0x0800))
2992 /* For a BLX instruction, make sure that the relocation is rounded up
2993 to a word boundary. This follows the semantics of the instruction
2994 which specifies that bit 1 of the target address will come from bit
2995 1 of the base address. */
2996 relocation = (relocation + 2) & ~ 3;
2998 /* Put RELOCATION back into the insn. */
2999 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
3000 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
3002 /* Put the relocated value back in the object file: */
3003 bfd_put_16 (input_bfd, upper_insn, hit_data);
3004 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3006 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3010 case R_ARM_THM_PC11:
3012 /* Thumb B (branch) instruction). */
3014 bfd_signed_vma relocation;
3015 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
3016 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3017 bfd_signed_vma signed_check;
3019 if (globals->use_rel)
3021 /* Need to refetch addend. */
3022 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3023 if (addend & ((howto->src_mask + 1) >> 1))
3026 signed_addend &= ~ howto->src_mask;
3027 signed_addend |= addend;
3030 signed_addend = addend;
3031 /* The value in the insn has been right shifted. We need to
3032 undo this, so that we can perform the address calculation
3033 in terms of bytes. */
3034 signed_addend <<= howto->rightshift;
3036 relocation = value + signed_addend;
3038 relocation -= (input_section->output_section->vma
3039 + input_section->output_offset
3042 relocation >>= howto->rightshift;
3043 signed_check = relocation;
3044 relocation &= howto->dst_mask;
3045 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
3047 bfd_put_16 (input_bfd, relocation, hit_data);
3049 /* Assumes two's complement. */
3050 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3051 return bfd_reloc_overflow;
3053 return bfd_reloc_ok;
3057 case R_ARM_ALU_PCREL7_0:
3058 case R_ARM_ALU_PCREL15_8:
3059 case R_ARM_ALU_PCREL23_15:
3064 insn = bfd_get_32 (input_bfd, hit_data);
3065 if (globals->use_rel)
3067 /* Extract the addend. */
3068 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
3069 signed_addend = addend;
3071 relocation = value + signed_addend;
3073 relocation -= (input_section->output_section->vma
3074 + input_section->output_offset
3076 insn = (insn & ~0xfff)
3077 | ((howto->bitpos << 7) & 0xf00)
3078 | ((relocation >> howto->bitpos) & 0xff);
3079 bfd_put_32 (input_bfd, value, hit_data);
3081 return bfd_reloc_ok;
3084 case R_ARM_GNU_VTINHERIT:
3085 case R_ARM_GNU_VTENTRY:
3086 return bfd_reloc_ok;
3089 return bfd_reloc_notsupported;
3091 case R_ARM_GLOB_DAT:
3092 return bfd_reloc_notsupported;
3094 case R_ARM_JUMP_SLOT:
3095 return bfd_reloc_notsupported;
3097 case R_ARM_RELATIVE:
3098 return bfd_reloc_notsupported;
3101 /* Relocation is relative to the start of the
3102 global offset table. */
3104 BFD_ASSERT (sgot != NULL);
3106 return bfd_reloc_notsupported;
3108 /* If we are addressing a Thumb function, we need to adjust the
3109 address by one, so that attempts to call the function pointer will
3110 correctly interpret it as Thumb code. */
3111 if (sym_flags == STT_ARM_TFUNC)
3114 /* Note that sgot->output_offset is not involved in this
3115 calculation. We always want the start of .got. If we
3116 define _GLOBAL_OFFSET_TABLE in a different way, as is
3117 permitted by the ABI, we might have to change this
3119 value -= sgot->output_section->vma;
3120 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3121 contents, rel->r_offset, value,
3125 /* Use global offset table as symbol value. */
3126 BFD_ASSERT (sgot != NULL);
3129 return bfd_reloc_notsupported;
3131 *unresolved_reloc_p = FALSE;
3132 value = sgot->output_section->vma;
3133 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3134 contents, rel->r_offset, value,
3139 case R_ARM_GOT_PREL:
3141 /* Relocation is to the entry for this symbol in the
3142 global offset table. */
3144 return bfd_reloc_notsupported;
3151 off = h->got.offset;
3152 BFD_ASSERT (off != (bfd_vma) -1);
3153 dyn = globals->root.dynamic_sections_created;
3155 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3157 && SYMBOL_REFERENCES_LOCAL (info, h))
3158 || (ELF_ST_VISIBILITY (h->other)
3159 && h->root.type == bfd_link_hash_undefweak))
3161 /* This is actually a static link, or it is a -Bsymbolic link
3162 and the symbol is defined locally. We must initialize this
3163 entry in the global offset table. Since the offset must
3164 always be a multiple of 4, we use the least significant bit
3165 to record whether we have initialized it already.
3167 When doing a dynamic link, we create a .rel.got relocation
3168 entry to initialize the value. This is done in the
3169 finish_dynamic_symbol routine. */
3174 /* If we are addressing a Thumb function, we need to
3175 adjust the address by one, so that attempts to
3176 call the function pointer will correctly
3177 interpret it as Thumb code. */
3178 if (sym_flags == STT_ARM_TFUNC)
3181 bfd_put_32 (output_bfd, value, sgot->contents + off);
3186 *unresolved_reloc_p = FALSE;
3188 value = sgot->output_offset + off;
3194 BFD_ASSERT (local_got_offsets != NULL &&
3195 local_got_offsets[r_symndx] != (bfd_vma) -1);
3197 off = local_got_offsets[r_symndx];
3199 /* The offset must always be a multiple of 4. We use the
3200 least significant bit to record whether we have already
3201 generated the necessary reloc. */
3206 /* If we are addressing a Thumb function, we need to
3207 adjust the address by one, so that attempts to
3208 call the function pointer will correctly
3209 interpret it as Thumb code. */
3210 if (sym_flags == STT_ARM_TFUNC)
3213 bfd_put_32 (output_bfd, value, sgot->contents + off);
3218 Elf_Internal_Rela outrel;
3221 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
3222 BFD_ASSERT (srelgot != NULL);
3224 outrel.r_offset = (sgot->output_section->vma
3225 + sgot->output_offset
3227 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3228 loc = srelgot->contents;
3229 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3230 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3233 local_got_offsets[r_symndx] |= 1;
3236 value = sgot->output_offset + off;
3238 if (r_type != R_ARM_GOT32)
3239 value += sgot->output_section->vma;
3241 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3242 contents, rel->r_offset, value,
3245 case R_ARM_TLS_LDO32:
3246 value = value - dtpoff_base (info);
3248 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3249 contents, rel->r_offset, value, (bfd_vma) 0);
3251 case R_ARM_TLS_LDM32:
3255 if (globals->sgot == NULL)
3258 off = globals->tls_ldm_got.offset;
3264 /* If we don't know the module number, create a relocation
3268 Elf_Internal_Rela outrel;
3271 if (globals->srelgot == NULL)
3274 outrel.r_offset = (globals->sgot->output_section->vma
3275 + globals->sgot->output_offset + off);
3276 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
3278 bfd_put_32 (output_bfd, 0, globals->sgot->contents + off);
3280 loc = globals->srelgot->contents;
3281 loc += globals->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3282 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3285 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
3287 globals->tls_ldm_got.offset |= 1;
3290 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3291 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3293 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3294 contents, rel->r_offset, value,
3298 case R_ARM_TLS_GD32:
3299 case R_ARM_TLS_IE32:
3305 if (globals->sgot == NULL)
3312 dyn = globals->root.dynamic_sections_created;
3313 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3315 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3317 *unresolved_reloc_p = FALSE;
3320 off = h->got.offset;
3321 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
3325 if (local_got_offsets == NULL)
3327 off = local_got_offsets[r_symndx];
3328 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
3331 if (tls_type == GOT_UNKNOWN)
3338 bfd_boolean need_relocs = FALSE;
3339 Elf_Internal_Rela outrel;
3340 bfd_byte *loc = NULL;
3343 /* The GOT entries have not been initialized yet. Do it
3344 now, and emit any relocations. If both an IE GOT and a
3345 GD GOT are necessary, we emit the GD first. */
3347 if ((info->shared || indx != 0)
3349 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3350 || h->root.type != bfd_link_hash_undefweak))
3353 if (globals->srelgot == NULL)
3355 loc = globals->srelgot->contents;
3356 loc += globals->srelgot->reloc_count * sizeof (Elf32_External_Rel);
3359 if (tls_type & GOT_TLS_GD)
3363 outrel.r_offset = (globals->sgot->output_section->vma
3364 + globals->sgot->output_offset + cur_off);
3365 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
3366 bfd_put_32 (output_bfd, 0, globals->sgot->contents + cur_off);
3368 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3369 globals->srelgot->reloc_count++;
3370 loc += sizeof (Elf32_External_Rel);
3373 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3374 globals->sgot->contents + cur_off + 4);
3377 bfd_put_32 (output_bfd, 0,
3378 globals->sgot->contents + cur_off + 4);
3380 outrel.r_info = ELF32_R_INFO (indx,
3381 R_ARM_TLS_DTPOFF32);
3382 outrel.r_offset += 4;
3383 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3384 globals->srelgot->reloc_count++;
3385 loc += sizeof (Elf32_External_Rel);
3390 /* If we are not emitting relocations for a
3391 general dynamic reference, then we must be in a
3392 static link or an executable link with the
3393 symbol binding locally. Mark it as belonging
3394 to module 1, the executable. */
3395 bfd_put_32 (output_bfd, 1,
3396 globals->sgot->contents + cur_off);
3397 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3398 globals->sgot->contents + cur_off + 4);
3404 if (tls_type & GOT_TLS_IE)
3408 outrel.r_offset = (globals->sgot->output_section->vma
3409 + globals->sgot->output_offset
3411 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
3414 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3415 globals->sgot->contents + cur_off);
3417 bfd_put_32 (output_bfd, 0,
3418 globals->sgot->contents + cur_off);
3420 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3421 globals->srelgot->reloc_count++;
3422 loc += sizeof (Elf32_External_Rel);
3425 bfd_put_32 (output_bfd, tpoff (info, value),
3426 globals->sgot->contents + cur_off);
3433 local_got_offsets[r_symndx] |= 1;
3436 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
3438 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3439 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3441 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3442 contents, rel->r_offset, value,
3446 case R_ARM_TLS_LE32:
3449 (*_bfd_error_handler)
3450 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
3451 input_bfd, input_section,
3452 (long) rel->r_offset, howto->name);
3456 value = tpoff (info, value);
3458 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3459 contents, rel->r_offset, value, (bfd_vma) 0);
3462 return bfd_reloc_notsupported;
3464 case R_ARM_AMP_VCALL9:
3465 return bfd_reloc_notsupported;
3467 case R_ARM_RSBREL32:
3468 return bfd_reloc_notsupported;
3470 case R_ARM_THM_RPC22:
3471 return bfd_reloc_notsupported;
3474 return bfd_reloc_notsupported;
3477 return bfd_reloc_notsupported;
3480 return bfd_reloc_notsupported;
3483 return bfd_reloc_notsupported;
3486 if (globals->fix_v4bx)
3488 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
3490 /* Ensure that we have a BX instruction. */
3491 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3493 /* Preserve Rm (lowest four bits) and the condition code
3494 (highest four bits). Other bits encode MOV PC,Rm. */
3495 insn = (insn & 0xf000000f) | 0x01a0f000;
3497 bfd_put_32 (input_bfd, insn, hit_data);
3499 return bfd_reloc_ok;
3502 return bfd_reloc_notsupported;
3506 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3508 arm_add_to_rel (bfd * abfd,
3510 reloc_howto_type * howto,
3511 bfd_signed_vma increment)
3513 bfd_signed_vma addend;
3515 if (howto->type == R_ARM_THM_PC22)
3517 int upper_insn, lower_insn;
3520 upper_insn = bfd_get_16 (abfd, address);
3521 lower_insn = bfd_get_16 (abfd, address + 2);
3522 upper = upper_insn & 0x7ff;
3523 lower = lower_insn & 0x7ff;
3525 addend = (upper << 12) | (lower << 1);
3526 addend += increment;
3529 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3530 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3532 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3533 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3539 contents = bfd_get_32 (abfd, address);
3541 /* Get the (signed) value from the instruction. */
3542 addend = contents & howto->src_mask;
3543 if (addend & ((howto->src_mask + 1) >> 1))
3545 bfd_signed_vma mask;
3548 mask &= ~ howto->src_mask;
3552 /* Add in the increment, (which is a byte value). */
3553 switch (howto->type)
3556 addend += increment;
3564 addend <<= howto->size;
3565 addend += increment;
3567 /* Should we check for overflow here ? */
3569 /* Drop any undesired bits. */
3570 addend >>= howto->rightshift;
3574 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3576 bfd_put_32 (abfd, contents, address);
3580 #define IS_ARM_TLS_RELOC(R_TYPE) \
3581 ((R_TYPE) == R_ARM_TLS_GD32 \
3582 || (R_TYPE) == R_ARM_TLS_LDO32 \
3583 || (R_TYPE) == R_ARM_TLS_LDM32 \
3584 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
3585 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
3586 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
3587 || (R_TYPE) == R_ARM_TLS_LE32 \
3588 || (R_TYPE) == R_ARM_TLS_IE32)
3590 /* Relocate an ARM ELF section. */
3592 elf32_arm_relocate_section (bfd * output_bfd,
3593 struct bfd_link_info * info,
3595 asection * input_section,
3596 bfd_byte * contents,
3597 Elf_Internal_Rela * relocs,
3598 Elf_Internal_Sym * local_syms,
3599 asection ** local_sections)
3601 Elf_Internal_Shdr *symtab_hdr;
3602 struct elf_link_hash_entry **sym_hashes;
3603 Elf_Internal_Rela *rel;
3604 Elf_Internal_Rela *relend;
3606 struct elf32_arm_link_hash_table * globals;
3608 globals = elf32_arm_hash_table (info);
3609 if (info->relocatable && !globals->use_rel)
3612 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3613 sym_hashes = elf_sym_hashes (input_bfd);
3616 relend = relocs + input_section->reloc_count;
3617 for (; rel < relend; rel++)
3620 reloc_howto_type * howto;
3621 unsigned long r_symndx;
3622 Elf_Internal_Sym * sym;
3624 struct elf_link_hash_entry * h;
3626 bfd_reloc_status_type r;
3629 bfd_boolean unresolved_reloc = FALSE;
3631 r_symndx = ELF32_R_SYM (rel->r_info);
3632 r_type = ELF32_R_TYPE (rel->r_info);
3633 r_type = arm_real_reloc_type (globals, r_type);
3635 if ( r_type == R_ARM_GNU_VTENTRY
3636 || r_type == R_ARM_GNU_VTINHERIT)
3639 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3640 howto = bfd_reloc.howto;
3642 if (info->relocatable && globals->use_rel)
3644 /* This is a relocatable link. We don't have to change
3645 anything, unless the reloc is against a section symbol,
3646 in which case we have to adjust according to where the
3647 section symbol winds up in the output section. */
3648 if (r_symndx < symtab_hdr->sh_info)
3650 sym = local_syms + r_symndx;
3651 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3653 sec = local_sections[r_symndx];
3654 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3656 (bfd_signed_vma) (sec->output_offset
3664 /* This is a final link. */
3669 if (r_symndx < symtab_hdr->sh_info)
3671 sym = local_syms + r_symndx;
3672 sym_type = ELF32_ST_TYPE (sym->st_info);
3673 sec = local_sections[r_symndx];
3674 if (globals->use_rel)
3676 relocation = (sec->output_section->vma
3677 + sec->output_offset
3679 if ((sec->flags & SEC_MERGE)
3680 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3683 bfd_vma addend, value;
3685 if (howto->rightshift)
3687 (*_bfd_error_handler)
3688 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3689 input_bfd, input_section,
3690 (long) rel->r_offset, howto->name);
3694 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3696 /* Get the (signed) value from the instruction. */
3697 addend = value & howto->src_mask;
3698 if (addend & ((howto->src_mask + 1) >> 1))
3700 bfd_signed_vma mask;
3703 mask &= ~ howto->src_mask;
3708 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3710 addend += msec->output_section->vma + msec->output_offset;
3711 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3712 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3716 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3722 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3723 r_symndx, symtab_hdr, sym_hashes,
3725 unresolved_reloc, warned);
3731 name = h->root.root.string;
3734 name = (bfd_elf_string_from_elf_section
3735 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3736 if (name == NULL || *name == '\0')
3737 name = bfd_section_name (input_bfd, sec);
3741 && r_type != R_ARM_NONE
3743 || h->root.type == bfd_link_hash_defined
3744 || h->root.type == bfd_link_hash_defweak)
3745 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
3747 (*_bfd_error_handler)
3748 ((sym_type == STT_TLS
3749 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
3750 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
3753 (long) rel->r_offset,
3758 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3759 input_section, contents, rel,
3760 relocation, info, sec, name,
3761 (h ? ELF_ST_TYPE (h->type) :
3762 ELF_ST_TYPE (sym->st_info)), h,
3765 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3766 because such sections are not SEC_ALLOC and thus ld.so will
3767 not process them. */
3768 if (unresolved_reloc
3769 && !((input_section->flags & SEC_DEBUGGING) != 0
3772 (*_bfd_error_handler)
3773 (_("%B(%A+0x%lx): warning: unresolvable relocation %d against symbol `%s'"),
3774 input_bfd, input_section, (long) rel->r_offset,
3775 r_type, h->root.root.string);
3779 if (r != bfd_reloc_ok)
3781 const char * msg = (const char *) 0;
3785 case bfd_reloc_overflow:
3786 /* If the overflowing reloc was to an undefined symbol,
3787 we have already printed one error message and there
3788 is no point complaining again. */
3790 h->root.type != bfd_link_hash_undefined)
3791 && (!((*info->callbacks->reloc_overflow)
3792 (info, (h ? &h->root : NULL), name, howto->name,
3793 (bfd_vma) 0, input_bfd, input_section,
3798 case bfd_reloc_undefined:
3799 if (!((*info->callbacks->undefined_symbol)
3800 (info, name, input_bfd, input_section,
3801 rel->r_offset, TRUE)))
3805 case bfd_reloc_outofrange:
3806 msg = _("internal error: out of range error");
3809 case bfd_reloc_notsupported:
3810 msg = _("internal error: unsupported relocation error");
3813 case bfd_reloc_dangerous:
3814 msg = _("internal error: dangerous error");
3818 msg = _("internal error: unknown error");
3822 if (!((*info->callbacks->warning)
3823 (info, msg, name, input_bfd, input_section,
3834 /* Set the right machine number. */
3837 elf32_arm_object_p (bfd *abfd)
3841 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3843 if (mach != bfd_mach_arm_unknown)
3844 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3846 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3847 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3850 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3855 /* Function to keep ARM specific flags in the ELF header. */
3858 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3860 if (elf_flags_init (abfd)
3861 && elf_elfheader (abfd)->e_flags != flags)
3863 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3865 if (flags & EF_ARM_INTERWORK)
3866 (*_bfd_error_handler)
3867 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3871 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3877 elf_elfheader (abfd)->e_flags = flags;
3878 elf_flags_init (abfd) = TRUE;
3884 /* Copy backend specific data from one object module to another. */
3887 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3892 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3893 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3896 in_flags = elf_elfheader (ibfd)->e_flags;
3897 out_flags = elf_elfheader (obfd)->e_flags;
3899 if (elf_flags_init (obfd)
3900 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3901 && in_flags != out_flags)
3903 /* Cannot mix APCS26 and APCS32 code. */
3904 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3907 /* Cannot mix float APCS and non-float APCS code. */
3908 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3911 /* If the src and dest have different interworking flags
3912 then turn off the interworking bit. */
3913 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3915 if (out_flags & EF_ARM_INTERWORK)
3917 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3920 in_flags &= ~EF_ARM_INTERWORK;
3923 /* Likewise for PIC, though don't warn for this case. */
3924 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3925 in_flags &= ~EF_ARM_PIC;
3928 elf_elfheader (obfd)->e_flags = in_flags;
3929 elf_flags_init (obfd) = TRUE;
3931 /* Also copy the EI_OSABI field. */
3932 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3933 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3938 /* Merge backend specific data from an object file to the output
3939 object file when linking. */
3942 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3946 bfd_boolean flags_compatible = TRUE;
3949 /* Check if we have the same endianess. */
3950 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3953 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3954 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3957 /* The input BFD must have had its flags initialised. */
3958 /* The following seems bogus to me -- The flags are initialized in
3959 the assembler but I don't think an elf_flags_init field is
3960 written into the object. */
3961 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3963 in_flags = elf_elfheader (ibfd)->e_flags;
3964 out_flags = elf_elfheader (obfd)->e_flags;
3966 if (!elf_flags_init (obfd))
3968 /* If the input is the default architecture and had the default
3969 flags then do not bother setting the flags for the output
3970 architecture, instead allow future merges to do this. If no
3971 future merges ever set these flags then they will retain their
3972 uninitialised values, which surprise surprise, correspond
3973 to the default values. */
3974 if (bfd_get_arch_info (ibfd)->the_default
3975 && elf_elfheader (ibfd)->e_flags == 0)
3978 elf_flags_init (obfd) = TRUE;
3979 elf_elfheader (obfd)->e_flags = in_flags;
3981 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3982 && bfd_get_arch_info (obfd)->the_default)
3983 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3988 /* Determine what should happen if the input ARM architecture
3989 does not match the output ARM architecture. */
3990 if (! bfd_arm_merge_machines (ibfd, obfd))
3993 /* Identical flags must be compatible. */
3994 if (in_flags == out_flags)
3997 /* Check to see if the input BFD actually contains any sections. If
3998 not, its flags may not have been initialised either, but it
3999 cannot actually cause any incompatibility. Do not short-circuit
4000 dynamic objects; their section list may be emptied by
4001 elf_link_add_object_symbols.
4003 Also check to see if there are no code sections in the input.
4004 In this case there is no need to check for code specific flags.
4005 XXX - do we need to worry about floating-point format compatability
4006 in data sections ? */
4007 if (!(ibfd->flags & DYNAMIC))
4009 bfd_boolean null_input_bfd = TRUE;
4010 bfd_boolean only_data_sections = TRUE;
4012 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4014 /* Ignore synthetic glue sections. */
4015 if (strcmp (sec->name, ".glue_7")
4016 && strcmp (sec->name, ".glue_7t"))
4018 if ((bfd_get_section_flags (ibfd, sec)
4019 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4020 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4021 only_data_sections = FALSE;
4023 null_input_bfd = FALSE;
4028 if (null_input_bfd || only_data_sections)
4032 /* Complain about various flag mismatches. */
4033 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
4036 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
4038 (in_flags & EF_ARM_EABIMASK) >> 24,
4039 (out_flags & EF_ARM_EABIMASK) >> 24);
4043 /* Not sure what needs to be checked for EABI versions >= 1. */
4044 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
4046 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
4049 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
4051 in_flags & EF_ARM_APCS_26 ? 26 : 32,
4052 out_flags & EF_ARM_APCS_26 ? 26 : 32);
4053 flags_compatible = FALSE;
4056 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
4058 if (in_flags & EF_ARM_APCS_FLOAT)
4060 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
4064 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
4067 flags_compatible = FALSE;
4070 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
4072 if (in_flags & EF_ARM_VFP_FLOAT)
4074 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
4078 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
4081 flags_compatible = FALSE;
4084 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
4086 if (in_flags & EF_ARM_MAVERICK_FLOAT)
4088 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
4092 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
4095 flags_compatible = FALSE;
4098 #ifdef EF_ARM_SOFT_FLOAT
4099 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
4101 /* We can allow interworking between code that is VFP format
4102 layout, and uses either soft float or integer regs for
4103 passing floating point arguments and results. We already
4104 know that the APCS_FLOAT flags match; similarly for VFP
4106 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
4107 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
4109 if (in_flags & EF_ARM_SOFT_FLOAT)
4111 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
4115 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
4118 flags_compatible = FALSE;
4123 /* Interworking mismatch is only a warning. */
4124 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
4126 if (in_flags & EF_ARM_INTERWORK)
4129 (_("Warning: %B supports interworking, whereas %B does not"),
4135 (_("Warning: %B does not support interworking, whereas %B does"),
4141 return flags_compatible;
4144 /* Display the flags field. */
4147 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
4149 FILE * file = (FILE *) ptr;
4150 unsigned long flags;
4152 BFD_ASSERT (abfd != NULL && ptr != NULL);
4154 /* Print normal ELF private data. */
4155 _bfd_elf_print_private_bfd_data (abfd, ptr);
4157 flags = elf_elfheader (abfd)->e_flags;
4158 /* Ignore init flag - it may not be set, despite the flags field
4159 containing valid data. */
4161 /* xgettext:c-format */
4162 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4164 switch (EF_ARM_EABI_VERSION (flags))
4166 case EF_ARM_EABI_UNKNOWN:
4167 /* The following flag bits are GNU extensions and not part of the
4168 official ARM ELF extended ABI. Hence they are only decoded if
4169 the EABI version is not set. */
4170 if (flags & EF_ARM_INTERWORK)
4171 fprintf (file, _(" [interworking enabled]"));
4173 if (flags & EF_ARM_APCS_26)
4174 fprintf (file, " [APCS-26]");
4176 fprintf (file, " [APCS-32]");
4178 if (flags & EF_ARM_VFP_FLOAT)
4179 fprintf (file, _(" [VFP float format]"));
4180 else if (flags & EF_ARM_MAVERICK_FLOAT)
4181 fprintf (file, _(" [Maverick float format]"));
4183 fprintf (file, _(" [FPA float format]"));
4185 if (flags & EF_ARM_APCS_FLOAT)
4186 fprintf (file, _(" [floats passed in float registers]"));
4188 if (flags & EF_ARM_PIC)
4189 fprintf (file, _(" [position independent]"));
4191 if (flags & EF_ARM_NEW_ABI)
4192 fprintf (file, _(" [new ABI]"));
4194 if (flags & EF_ARM_OLD_ABI)
4195 fprintf (file, _(" [old ABI]"));
4197 if (flags & EF_ARM_SOFT_FLOAT)
4198 fprintf (file, _(" [software FP]"));
4200 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
4201 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
4202 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
4203 | EF_ARM_MAVERICK_FLOAT);
4206 case EF_ARM_EABI_VER1:
4207 fprintf (file, _(" [Version1 EABI]"));
4209 if (flags & EF_ARM_SYMSARESORTED)
4210 fprintf (file, _(" [sorted symbol table]"));
4212 fprintf (file, _(" [unsorted symbol table]"));
4214 flags &= ~ EF_ARM_SYMSARESORTED;
4217 case EF_ARM_EABI_VER2:
4218 fprintf (file, _(" [Version2 EABI]"));
4220 if (flags & EF_ARM_SYMSARESORTED)
4221 fprintf (file, _(" [sorted symbol table]"));
4223 fprintf (file, _(" [unsorted symbol table]"));
4225 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
4226 fprintf (file, _(" [dynamic symbols use segment index]"));
4228 if (flags & EF_ARM_MAPSYMSFIRST)
4229 fprintf (file, _(" [mapping symbols precede others]"));
4231 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
4232 | EF_ARM_MAPSYMSFIRST);
4235 case EF_ARM_EABI_VER3:
4236 fprintf (file, _(" [Version3 EABI]"));
4239 case EF_ARM_EABI_VER4:
4240 fprintf (file, _(" [Version4 EABI]"));
4242 if (flags & EF_ARM_BE8)
4243 fprintf (file, _(" [BE8]"));
4245 if (flags & EF_ARM_LE8)
4246 fprintf (file, _(" [LE8]"));
4248 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
4252 fprintf (file, _(" <EABI version unrecognised>"));
4256 flags &= ~ EF_ARM_EABIMASK;
4258 if (flags & EF_ARM_RELEXEC)
4259 fprintf (file, _(" [relocatable executable]"));
4261 if (flags & EF_ARM_HASENTRY)
4262 fprintf (file, _(" [has entry point]"));
4264 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
4267 fprintf (file, _("<Unrecognised flag bits set>"));
4275 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
4277 switch (ELF_ST_TYPE (elf_sym->st_info))
4280 return ELF_ST_TYPE (elf_sym->st_info);
4283 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
4284 This allows us to distinguish between data used by Thumb instructions
4285 and non-data (which is probably code) inside Thumb regions of an
4287 if (type != STT_OBJECT)
4288 return ELF_ST_TYPE (elf_sym->st_info);
4299 elf32_arm_gc_mark_hook (asection * sec,
4300 struct bfd_link_info * info ATTRIBUTE_UNUSED,
4301 Elf_Internal_Rela * rel,
4302 struct elf_link_hash_entry * h,
4303 Elf_Internal_Sym * sym)
4307 switch (ELF32_R_TYPE (rel->r_info))
4309 case R_ARM_GNU_VTINHERIT:
4310 case R_ARM_GNU_VTENTRY:
4314 switch (h->root.type)
4316 case bfd_link_hash_defined:
4317 case bfd_link_hash_defweak:
4318 return h->root.u.def.section;
4320 case bfd_link_hash_common:
4321 return h->root.u.c.p->section;
4329 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4334 /* Update the got entry reference counts for the section being removed. */
4337 elf32_arm_gc_sweep_hook (bfd * abfd,
4338 struct bfd_link_info * info,
4340 const Elf_Internal_Rela * relocs)
4342 Elf_Internal_Shdr *symtab_hdr;
4343 struct elf_link_hash_entry **sym_hashes;
4344 bfd_signed_vma *local_got_refcounts;
4345 const Elf_Internal_Rela *rel, *relend;
4346 struct elf32_arm_link_hash_table * globals;
4348 globals = elf32_arm_hash_table (info);
4350 elf_section_data (sec)->local_dynrel = NULL;
4352 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4353 sym_hashes = elf_sym_hashes (abfd);
4354 local_got_refcounts = elf_local_got_refcounts (abfd);
4356 relend = relocs + sec->reloc_count;
4357 for (rel = relocs; rel < relend; rel++)
4359 unsigned long r_symndx;
4360 struct elf_link_hash_entry *h = NULL;
4363 r_symndx = ELF32_R_SYM (rel->r_info);
4364 if (r_symndx >= symtab_hdr->sh_info)
4366 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4367 while (h->root.type == bfd_link_hash_indirect
4368 || h->root.type == bfd_link_hash_warning)
4369 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4372 r_type = ELF32_R_TYPE (rel->r_info);
4374 r_type = arm_real_reloc_type (globals, r_type);
4380 case R_ARM_GOT_PREL:
4382 case R_ARM_TLS_GD32:
4383 case R_ARM_TLS_IE32:
4386 if (h->got.refcount > 0)
4387 h->got.refcount -= 1;
4389 else if (local_got_refcounts != NULL)
4391 if (local_got_refcounts[r_symndx] > 0)
4392 local_got_refcounts[r_symndx] -= 1;
4396 case R_ARM_TLS_LDM32:
4397 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
4409 case R_ARM_THM_PC22:
4410 /* Should the interworking branches be here also? */
4414 struct elf32_arm_link_hash_entry *eh;
4415 struct elf32_arm_relocs_copied **pp;
4416 struct elf32_arm_relocs_copied *p;
4418 eh = (struct elf32_arm_link_hash_entry *) h;
4420 if (h->plt.refcount > 0)
4422 h->plt.refcount -= 1;
4423 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
4424 eh->plt_thumb_refcount--;
4427 if (r_type == R_ARM_ABS32
4428 || r_type == R_ARM_REL32)
4430 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
4432 if (p->section == sec)
4435 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
4453 /* Look through the relocs for a section during the first phase. */
4456 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
4457 asection *sec, const Elf_Internal_Rela *relocs)
4459 Elf_Internal_Shdr *symtab_hdr;
4460 struct elf_link_hash_entry **sym_hashes;
4461 struct elf_link_hash_entry **sym_hashes_end;
4462 const Elf_Internal_Rela *rel;
4463 const Elf_Internal_Rela *rel_end;
4466 bfd_vma *local_got_offsets;
4467 struct elf32_arm_link_hash_table *htab;
4469 if (info->relocatable)
4472 htab = elf32_arm_hash_table (info);
4475 /* Create dynamic sections for relocatable executables so that we can
4476 copy relocations. */
4477 if (htab->root.is_relocatable_executable
4478 && ! htab->root.dynamic_sections_created)
4480 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
4484 dynobj = elf_hash_table (info)->dynobj;
4485 local_got_offsets = elf_local_got_offsets (abfd);
4487 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4488 sym_hashes = elf_sym_hashes (abfd);
4489 sym_hashes_end = sym_hashes
4490 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
4492 if (!elf_bad_symtab (abfd))
4493 sym_hashes_end -= symtab_hdr->sh_info;
4495 rel_end = relocs + sec->reloc_count;
4496 for (rel = relocs; rel < rel_end; rel++)
4498 struct elf_link_hash_entry *h;
4499 struct elf32_arm_link_hash_entry *eh;
4500 unsigned long r_symndx;
4503 r_symndx = ELF32_R_SYM (rel->r_info);
4504 r_type = ELF32_R_TYPE (rel->r_info);
4506 r_type = arm_real_reloc_type (htab, r_type);
4509 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
4511 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
4516 if (r_symndx < symtab_hdr->sh_info)
4519 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4521 eh = (struct elf32_arm_link_hash_entry *) h;
4527 case R_ARM_GOT_PREL:
4529 case R_ARM_TLS_GD32:
4530 case R_ARM_TLS_IE32:
4531 /* This symbol requires a global offset table entry. */
4533 int tls_type, old_tls_type;
4537 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
4538 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
4539 default: tls_type = GOT_NORMAL; break;
4545 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
4549 bfd_signed_vma *local_got_refcounts;
4551 /* This is a global offset table entry for a local symbol. */
4552 local_got_refcounts = elf_local_got_refcounts (abfd);
4553 if (local_got_refcounts == NULL)
4557 size = symtab_hdr->sh_info;
4558 size *= (sizeof (bfd_signed_vma) + sizeof(char));
4559 local_got_refcounts = bfd_zalloc (abfd, size);
4560 if (local_got_refcounts == NULL)
4562 elf_local_got_refcounts (abfd) = local_got_refcounts;
4563 elf32_arm_local_got_tls_type (abfd)
4564 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4566 local_got_refcounts[r_symndx] += 1;
4567 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
4570 /* We will already have issued an error message if there is a
4571 TLS / non-TLS mismatch, based on the symbol type. We don't
4572 support any linker relaxations. So just combine any TLS
4574 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4575 && tls_type != GOT_NORMAL)
4576 tls_type |= old_tls_type;
4578 if (old_tls_type != tls_type)
4581 elf32_arm_hash_entry (h)->tls_type = tls_type;
4583 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
4588 case R_ARM_TLS_LDM32:
4589 if (r_type == R_ARM_TLS_LDM32)
4590 htab->tls_ldm_got.refcount++;
4595 if (htab->sgot == NULL)
4597 if (htab->root.dynobj == NULL)
4598 htab->root.dynobj = abfd;
4599 if (!create_got_section (htab->root.dynobj, info))
4613 case R_ARM_THM_PC22:
4614 /* Should the interworking branches be listed here? */
4617 /* If this reloc is in a read-only section, we might
4618 need a copy reloc. We can't check reliably at this
4619 stage whether the section is read-only, as input
4620 sections have not yet been mapped to output sections.
4621 Tentatively set the flag for now, and correct in
4622 adjust_dynamic_symbol. */
4626 /* We may need a .plt entry if the function this reloc
4627 refers to is in a different object. We can't tell for
4628 sure yet, because something later might force the
4630 if (r_type == R_ARM_PC24
4632 || r_type == R_ARM_CALL
4633 || r_type == R_ARM_JUMP24
4634 || r_type == R_ARM_PREL31
4636 || r_type == R_ARM_PLT32
4637 || r_type == R_ARM_THM_PC22)
4640 /* If we create a PLT entry, this relocation will reference
4641 it, even if it's an ABS32 relocation. */
4642 h->plt.refcount += 1;
4644 if (r_type == R_ARM_THM_PC22)
4645 eh->plt_thumb_refcount += 1;
4648 /* If we are creating a shared library or relocatable executable,
4649 and this is a reloc against a global symbol, or a non PC
4650 relative reloc against a local symbol, then we need to copy
4651 the reloc into the shared library. However, if we are linking
4652 with -Bsymbolic, we do not need to copy a reloc against a
4653 global symbol which is defined in an object we are
4654 including in the link (i.e., DEF_REGULAR is set). At
4655 this point we have not seen all the input files, so it is
4656 possible that DEF_REGULAR is not set now but will be set
4657 later (it is never cleared). We account for that
4658 possibility below by storing information in the
4659 relocs_copied field of the hash table entry. */
4660 if ((info->shared || htab->root.is_relocatable_executable)
4661 && (sec->flags & SEC_ALLOC) != 0
4662 && (r_type == R_ARM_ABS32
4663 || (h != NULL && ! h->needs_plt
4664 && (! info->symbolic || ! h->def_regular))))
4666 struct elf32_arm_relocs_copied *p, **head;
4668 /* When creating a shared object, we must copy these
4669 reloc types into the output file. We create a reloc
4670 section in dynobj and make room for this reloc. */
4675 name = (bfd_elf_string_from_elf_section
4677 elf_elfheader (abfd)->e_shstrndx,
4678 elf_section_data (sec)->rel_hdr.sh_name));
4682 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
4683 && strcmp (bfd_get_section_name (abfd, sec),
4686 sreloc = bfd_get_section_by_name (dynobj, name);
4691 sreloc = bfd_make_section (dynobj, name);
4692 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4693 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4694 if ((sec->flags & SEC_ALLOC) != 0
4695 /* BPABI objects never have dynamic
4696 relocations mapped. */
4697 && !htab->symbian_p)
4698 flags |= SEC_ALLOC | SEC_LOAD;
4700 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4701 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
4705 elf_section_data (sec)->sreloc = sreloc;
4708 /* If this is a global symbol, we count the number of
4709 relocations we need for this symbol. */
4712 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4716 /* Track dynamic relocs needed for local syms too.
4717 We really need local syms available to do this
4721 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4726 head = ((struct elf32_arm_relocs_copied **)
4727 &elf_section_data (s)->local_dynrel);
4731 if (p == NULL || p->section != sec)
4733 bfd_size_type amt = sizeof *p;
4735 p = bfd_alloc (htab->root.dynobj, amt);
4745 if (r_type == R_ARM_REL32)
4751 /* This relocation describes the C++ object vtable hierarchy.
4752 Reconstruct it for later use during GC. */
4753 case R_ARM_GNU_VTINHERIT:
4754 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4758 /* This relocation describes which C++ vtable entries are actually
4759 used. Record for later use during GC. */
4760 case R_ARM_GNU_VTENTRY:
4761 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
4770 /* Treat mapping symbols as special target symbols. */
4773 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4775 return bfd_is_arm_mapping_symbol_name (sym->name);
4778 /* This is a copy of elf_find_function() from elf.c except that
4779 ARM mapping symbols are ignored when looking for function names
4780 and STT_ARM_TFUNC is considered to a function type. */
4783 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4787 const char ** filename_ptr,
4788 const char ** functionname_ptr)
4790 const char * filename = NULL;
4791 asymbol * func = NULL;
4792 bfd_vma low_func = 0;
4795 for (p = symbols; *p != NULL; p++)
4799 q = (elf_symbol_type *) *p;
4801 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4806 filename = bfd_asymbol_name (&q->symbol);
4811 /* Skip $a and $t symbols. */
4812 if ((q->symbol.flags & BSF_LOCAL)
4813 && bfd_is_arm_mapping_symbol_name (q->symbol.name))
4816 if (bfd_get_section (&q->symbol) == section
4817 && q->symbol.value >= low_func
4818 && q->symbol.value <= offset)
4820 func = (asymbol *) q;
4821 low_func = q->symbol.value;
4831 *filename_ptr = filename;
4832 if (functionname_ptr)
4833 *functionname_ptr = bfd_asymbol_name (func);
4839 /* Find the nearest line to a particular section and offset, for error
4840 reporting. This code is a duplicate of the code in elf.c, except
4841 that it uses arm_elf_find_function. */
4844 elf32_arm_find_nearest_line (bfd * abfd,
4848 const char ** filename_ptr,
4849 const char ** functionname_ptr,
4850 unsigned int * line_ptr)
4852 bfd_boolean found = FALSE;
4854 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4856 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4857 filename_ptr, functionname_ptr,
4859 & elf_tdata (abfd)->dwarf2_find_line_info))
4861 if (!*functionname_ptr)
4862 arm_elf_find_function (abfd, section, symbols, offset,
4863 *filename_ptr ? NULL : filename_ptr,
4869 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4870 & found, filename_ptr,
4871 functionname_ptr, line_ptr,
4872 & elf_tdata (abfd)->line_info))
4875 if (found && (*functionname_ptr || *line_ptr))
4878 if (symbols == NULL)
4881 if (! arm_elf_find_function (abfd, section, symbols, offset,
4882 filename_ptr, functionname_ptr))
4889 /* Adjust a symbol defined by a dynamic object and referenced by a
4890 regular object. The current definition is in some section of the
4891 dynamic object, but we're not including those sections. We have to
4892 change the definition to something the rest of the link can
4896 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4897 struct elf_link_hash_entry * h)
4901 unsigned int power_of_two;
4902 struct elf32_arm_link_hash_entry * eh;
4903 struct elf32_arm_link_hash_table *globals;
4905 globals = elf32_arm_hash_table (info);
4906 dynobj = elf_hash_table (info)->dynobj;
4908 /* Make sure we know what is going on here. */
4909 BFD_ASSERT (dynobj != NULL
4911 || h->u.weakdef != NULL
4914 && !h->def_regular)));
4916 eh = (struct elf32_arm_link_hash_entry *) h;
4918 /* If this is a function, put it in the procedure linkage table. We
4919 will fill in the contents of the procedure linkage table later,
4920 when we know the address of the .got section. */
4921 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
4924 if (h->plt.refcount <= 0
4925 || SYMBOL_CALLS_LOCAL (info, h)
4926 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4927 && h->root.type == bfd_link_hash_undefweak))
4929 /* This case can occur if we saw a PLT32 reloc in an input
4930 file, but the symbol was never referred to by a dynamic
4931 object, or if all references were garbage collected. In
4932 such a case, we don't actually need to build a procedure
4933 linkage table, and we can just do a PC24 reloc instead. */
4934 h->plt.offset = (bfd_vma) -1;
4935 eh->plt_thumb_refcount = 0;
4943 /* It's possible that we incorrectly decided a .plt reloc was
4944 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4945 in check_relocs. We can't decide accurately between function
4946 and non-function syms in check-relocs; Objects loaded later in
4947 the link may change h->type. So fix it now. */
4948 h->plt.offset = (bfd_vma) -1;
4949 eh->plt_thumb_refcount = 0;
4952 /* If this is a weak symbol, and there is a real definition, the
4953 processor independent code will have arranged for us to see the
4954 real definition first, and we can just use the same value. */
4955 if (h->u.weakdef != NULL)
4957 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4958 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4959 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4960 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4964 /* If there are no non-GOT references, we do not need a copy
4966 if (!h->non_got_ref)
4969 /* This is a reference to a symbol defined by a dynamic object which
4970 is not a function. */
4972 /* If we are creating a shared library, we must presume that the
4973 only references to the symbol are via the global offset table.
4974 For such cases we need not do anything here; the relocations will
4975 be handled correctly by relocate_section. Relocatable executables
4976 can reference data in shared objects directly, so we don't need to
4977 do anything here. */
4978 if (info->shared || globals->root.is_relocatable_executable)
4981 /* We must allocate the symbol in our .dynbss section, which will
4982 become part of the .bss section of the executable. There will be
4983 an entry for this symbol in the .dynsym section. The dynamic
4984 object will contain position independent code, so all references
4985 from the dynamic object to this symbol will go through the global
4986 offset table. The dynamic linker will use the .dynsym entry to
4987 determine the address it must put in the global offset table, so
4988 both the dynamic object and the regular object will refer to the
4989 same memory location for the variable. */
4990 s = bfd_get_section_by_name (dynobj, ".dynbss");
4991 BFD_ASSERT (s != NULL);
4993 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4994 copy the initial value out of the dynamic object and into the
4995 runtime process image. We need to remember the offset into the
4996 .rel.bss section we are going to use. */
4997 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5001 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
5002 BFD_ASSERT (srel != NULL);
5003 srel->size += sizeof (Elf32_External_Rel);
5007 /* We need to figure out the alignment required for this symbol. I
5008 have no idea how ELF linkers handle this. */
5009 power_of_two = bfd_log2 (h->size);
5010 if (power_of_two > 3)
5013 /* Apply the required alignment. */
5014 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5015 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5017 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
5021 /* Define the symbol as being at this point in the section. */
5022 h->root.u.def.section = s;
5023 h->root.u.def.value = s->size;
5025 /* Increment the section size to make room for the symbol. */
5031 /* Allocate space in .plt, .got and associated reloc sections for
5035 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
5037 struct bfd_link_info *info;
5038 struct elf32_arm_link_hash_table *htab;
5039 struct elf32_arm_link_hash_entry *eh;
5040 struct elf32_arm_relocs_copied *p;
5042 eh = (struct elf32_arm_link_hash_entry *) h;
5044 if (h->root.type == bfd_link_hash_indirect)
5047 if (h->root.type == bfd_link_hash_warning)
5048 /* When warning symbols are created, they **replace** the "real"
5049 entry in the hash table, thus we never get to see the real
5050 symbol in a hash traversal. So look at it now. */
5051 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5053 info = (struct bfd_link_info *) inf;
5054 htab = elf32_arm_hash_table (info);
5056 if (htab->root.dynamic_sections_created
5057 && h->plt.refcount > 0)
5059 /* Make sure this symbol is output as a dynamic symbol.
5060 Undefined weak syms won't yet be marked as dynamic. */
5061 if (h->dynindx == -1
5062 && !h->forced_local)
5064 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5069 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5071 asection *s = htab->splt;
5073 /* If this is the first .plt entry, make room for the special
5076 s->size += htab->plt_header_size;
5078 h->plt.offset = s->size;
5080 /* If we will insert a Thumb trampoline before this PLT, leave room
5082 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
5084 h->plt.offset += PLT_THUMB_STUB_SIZE;
5085 s->size += PLT_THUMB_STUB_SIZE;
5088 /* If this symbol is not defined in a regular file, and we are
5089 not generating a shared library, then set the symbol to this
5090 location in the .plt. This is required to make function
5091 pointers compare as equal between the normal executable and
5092 the shared library. */
5096 h->root.u.def.section = s;
5097 h->root.u.def.value = h->plt.offset;
5099 /* Make sure the function is not marked as Thumb, in case
5100 it is the target of an ABS32 relocation, which will
5101 point to the PLT entry. */
5102 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
5103 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
5106 /* Make room for this entry. */
5107 s->size += htab->plt_entry_size;
5109 if (!htab->symbian_p)
5111 /* We also need to make an entry in the .got.plt section, which
5112 will be placed in the .got section by the linker script. */
5113 eh->plt_got_offset = htab->sgotplt->size;
5114 htab->sgotplt->size += 4;
5117 /* We also need to make an entry in the .rel.plt section. */
5118 htab->srelplt->size += sizeof (Elf32_External_Rel);
5122 h->plt.offset = (bfd_vma) -1;
5128 h->plt.offset = (bfd_vma) -1;
5132 if (h->got.refcount > 0)
5136 int tls_type = elf32_arm_hash_entry (h)->tls_type;
5139 /* Make sure this symbol is output as a dynamic symbol.
5140 Undefined weak syms won't yet be marked as dynamic. */
5141 if (h->dynindx == -1
5142 && !h->forced_local)
5144 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5148 if (!htab->symbian_p)
5151 h->got.offset = s->size;
5153 if (tls_type == GOT_UNKNOWN)
5156 if (tls_type == GOT_NORMAL)
5157 /* Non-TLS symbols need one GOT slot. */
5161 if (tls_type & GOT_TLS_GD)
5162 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
5164 if (tls_type & GOT_TLS_IE)
5165 /* R_ARM_TLS_IE32 needs one GOT slot. */
5169 dyn = htab->root.dynamic_sections_created;
5172 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5174 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5177 if (tls_type != GOT_NORMAL
5178 && (info->shared || indx != 0)
5179 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5180 || h->root.type != bfd_link_hash_undefweak))
5182 if (tls_type & GOT_TLS_IE)
5183 htab->srelgot->size += sizeof (Elf32_External_Rel);
5185 if (tls_type & GOT_TLS_GD)
5186 htab->srelgot->size += sizeof (Elf32_External_Rel);
5188 if ((tls_type & GOT_TLS_GD) && indx != 0)
5189 htab->srelgot->size += sizeof (Elf32_External_Rel);
5191 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5192 || h->root.type != bfd_link_hash_undefweak)
5194 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5195 htab->srelgot->size += sizeof (Elf32_External_Rel);
5199 h->got.offset = (bfd_vma) -1;
5201 if (eh->relocs_copied == NULL)
5204 /* In the shared -Bsymbolic case, discard space allocated for
5205 dynamic pc-relative relocs against symbols which turn out to be
5206 defined in regular objects. For the normal shared case, discard
5207 space for pc-relative relocs that have become local due to symbol
5208 visibility changes. */
5210 if (info->shared || htab->root.is_relocatable_executable)
5212 /* The only reloc that uses pc_count is R_ARM_REL32, which will
5213 appear on something like ".long foo - .". We want calls to
5214 protected symbols to resolve directly to the function rather
5215 than going via the plt. If people want function pointer
5216 comparisons to work as expected then they should avoid
5217 writing assembly like ".long foo - .". */
5218 if (SYMBOL_CALLS_LOCAL (info, h))
5220 struct elf32_arm_relocs_copied **pp;
5222 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
5224 p->count -= p->pc_count;
5233 /* Also discard relocs on undefined weak syms with non-default
5235 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5236 && h->root.type == bfd_link_hash_undefweak)
5237 eh->relocs_copied = NULL;
5238 else if (htab->root.is_relocatable_executable && h->dynindx == -1
5239 && h->root.type == bfd_link_hash_new)
5241 /* Output absolute symbols so that we can create relocations
5242 against them. For normal symbols we output a relocation
5243 against the section that contains them. */
5244 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5251 /* For the non-shared case, discard space for relocs against
5252 symbols which turn out to need copy relocs or are not
5258 || (htab->root.dynamic_sections_created
5259 && (h->root.type == bfd_link_hash_undefweak
5260 || h->root.type == bfd_link_hash_undefined))))
5262 /* Make sure this symbol is output as a dynamic symbol.
5263 Undefined weak syms won't yet be marked as dynamic. */
5264 if (h->dynindx == -1
5265 && !h->forced_local)
5267 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5271 /* If that succeeded, we know we'll be keeping all the
5273 if (h->dynindx != -1)
5277 eh->relocs_copied = NULL;
5282 /* Finally, allocate space. */
5283 for (p = eh->relocs_copied; p != NULL; p = p->next)
5285 asection *sreloc = elf_section_data (p->section)->sreloc;
5286 sreloc->size += p->count * sizeof (Elf32_External_Rel);
5292 /* Find any dynamic relocs that apply to read-only sections. */
5295 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5297 struct elf32_arm_link_hash_entry *eh;
5298 struct elf32_arm_relocs_copied *p;
5300 if (h->root.type == bfd_link_hash_warning)
5301 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5303 eh = (struct elf32_arm_link_hash_entry *) h;
5304 for (p = eh->relocs_copied; p != NULL; p = p->next)
5306 asection *s = p->section;
5308 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5310 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5312 info->flags |= DF_TEXTREL;
5314 /* Not an error, just cut short the traversal. */
5321 /* Set the sizes of the dynamic sections. */
5324 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5325 struct bfd_link_info * info)
5332 struct elf32_arm_link_hash_table *htab;
5334 htab = elf32_arm_hash_table (info);
5335 dynobj = elf_hash_table (info)->dynobj;
5336 BFD_ASSERT (dynobj != NULL);
5338 if (elf_hash_table (info)->dynamic_sections_created)
5340 /* Set the contents of the .interp section to the interpreter. */
5341 if (info->executable)
5343 s = bfd_get_section_by_name (dynobj, ".interp");
5344 BFD_ASSERT (s != NULL);
5345 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5346 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5350 /* Set up .got offsets for local syms, and space for local dynamic
5352 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5354 bfd_signed_vma *local_got;
5355 bfd_signed_vma *end_local_got;
5356 char *local_tls_type;
5357 bfd_size_type locsymcount;
5358 Elf_Internal_Shdr *symtab_hdr;
5361 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5364 for (s = ibfd->sections; s != NULL; s = s->next)
5366 struct elf32_arm_relocs_copied *p;
5368 for (p = *((struct elf32_arm_relocs_copied **)
5369 &elf_section_data (s)->local_dynrel);
5373 if (!bfd_is_abs_section (p->section)
5374 && bfd_is_abs_section (p->section->output_section))
5376 /* Input section has been discarded, either because
5377 it is a copy of a linkonce section or due to
5378 linker script /DISCARD/, so we'll be discarding
5381 else if (p->count != 0)
5383 srel = elf_section_data (p->section)->sreloc;
5384 srel->size += p->count * sizeof (Elf32_External_Rel);
5385 if ((p->section->output_section->flags & SEC_READONLY) != 0)
5386 info->flags |= DF_TEXTREL;
5391 local_got = elf_local_got_refcounts (ibfd);
5395 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5396 locsymcount = symtab_hdr->sh_info;
5397 end_local_got = local_got + locsymcount;
5398 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
5400 srel = htab->srelgot;
5401 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5405 *local_got = s->size;
5406 if (*local_tls_type & GOT_TLS_GD)
5407 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5409 if (*local_tls_type & GOT_TLS_IE)
5411 if (*local_tls_type == GOT_NORMAL)
5414 if (info->shared || *local_tls_type == GOT_TLS_GD)
5415 srel->size += sizeof (Elf32_External_Rel);
5418 *local_got = (bfd_vma) -1;
5422 if (htab->tls_ldm_got.refcount > 0)
5424 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5425 for R_ARM_TLS_LDM32 relocations. */
5426 htab->tls_ldm_got.offset = htab->sgot->size;
5427 htab->sgot->size += 8;
5429 htab->srelgot->size += sizeof (Elf32_External_Rel);
5432 htab->tls_ldm_got.offset = -1;
5434 /* Allocate global sym .plt and .got entries, and space for global
5435 sym dynamic relocs. */
5436 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5438 /* The check_relocs and adjust_dynamic_symbol entry points have
5439 determined the sizes of the various dynamic sections. Allocate
5443 for (s = dynobj->sections; s != NULL; s = s->next)
5448 if ((s->flags & SEC_LINKER_CREATED) == 0)
5451 /* It's OK to base decisions on the section name, because none
5452 of the dynobj section names depend upon the input files. */
5453 name = bfd_get_section_name (dynobj, s);
5457 if (strcmp (name, ".plt") == 0)
5461 /* Strip this section if we don't need it; see the
5467 /* Remember whether there is a PLT. */
5471 else if (strncmp (name, ".rel", 4) == 0)
5475 /* If we don't need this section, strip it from the
5476 output file. This is mostly to handle .rel.bss and
5477 .rel.plt. We must create both sections in
5478 create_dynamic_sections, because they must be created
5479 before the linker maps input sections to output
5480 sections. The linker does that before
5481 adjust_dynamic_symbol is called, and it is that
5482 function which decides whether anything needs to go
5483 into these sections. */
5488 /* Remember whether there are any reloc sections other
5490 if (strcmp (name, ".rel.plt") != 0)
5493 /* We use the reloc_count field as a counter if we need
5494 to copy relocs into the output file. */
5498 else if (strncmp (name, ".got", 4) != 0)
5500 /* It's not one of our sections, so don't allocate space. */
5506 _bfd_strip_section_from_output (info, s);
5510 /* Allocate memory for the section contents. */
5511 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5512 if (s->contents == NULL && s->size != 0)
5516 if (elf_hash_table (info)->dynamic_sections_created)
5518 /* Add some entries to the .dynamic section. We fill in the
5519 values later, in elf32_arm_finish_dynamic_sections, but we
5520 must add the entries now so that we get the correct size for
5521 the .dynamic section. The DT_DEBUG entry is filled in by the
5522 dynamic linker and used by the debugger. */
5523 #define add_dynamic_entry(TAG, VAL) \
5524 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5528 if (!add_dynamic_entry (DT_DEBUG, 0))
5534 if ( !add_dynamic_entry (DT_PLTGOT, 0)
5535 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5536 || !add_dynamic_entry (DT_PLTREL, DT_REL)
5537 || !add_dynamic_entry (DT_JMPREL, 0))
5543 if ( !add_dynamic_entry (DT_REL, 0)
5544 || !add_dynamic_entry (DT_RELSZ, 0)
5545 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
5549 /* If any dynamic relocs apply to a read-only section,
5550 then we need a DT_TEXTREL entry. */
5551 if ((info->flags & DF_TEXTREL) == 0)
5552 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
5555 if ((info->flags & DF_TEXTREL) != 0)
5557 if (!add_dynamic_entry (DT_TEXTREL, 0))
5559 info->flags |= DF_TEXTREL;
5562 #undef add_synamic_entry
5567 /* Finish up dynamic symbol handling. We set the contents of various
5568 dynamic sections here. */
5571 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
5572 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
5575 struct elf32_arm_link_hash_table *htab;
5576 struct elf32_arm_link_hash_entry *eh;
5578 dynobj = elf_hash_table (info)->dynobj;
5579 htab = elf32_arm_hash_table (info);
5580 eh = (struct elf32_arm_link_hash_entry *) h;
5582 if (h->plt.offset != (bfd_vma) -1)
5588 Elf_Internal_Rela rel;
5590 /* This symbol has an entry in the procedure linkage table. Set
5593 BFD_ASSERT (h->dynindx != -1);
5595 splt = bfd_get_section_by_name (dynobj, ".plt");
5596 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
5597 BFD_ASSERT (splt != NULL && srel != NULL);
5599 /* Fill in the entry in the procedure linkage table. */
5600 if (htab->symbian_p)
5603 for (i = 0; i < htab->plt_entry_size / 4; ++i)
5604 bfd_put_32 (output_bfd,
5605 elf32_arm_symbian_plt_entry[i],
5606 splt->contents + h->plt.offset + 4 * i);
5608 /* Fill in the entry in the .rel.plt section. */
5609 rel.r_offset = (splt->output_section->vma
5610 + splt->output_offset
5611 + h->plt.offset + 4 * (i - 1));
5612 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5614 /* Get the index in the procedure linkage table which
5615 corresponds to this symbol. This is the index of this symbol
5616 in all the symbols for which we are making plt entries. The
5617 first entry in the procedure linkage table is reserved. */
5618 plt_index = ((h->plt.offset - htab->plt_header_size)
5619 / htab->plt_entry_size);
5624 bfd_vma got_displacement;
5627 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5628 BFD_ASSERT (sgot != NULL);
5630 /* Get the offset into the .got.plt table of the entry that
5631 corresponds to this function. */
5632 got_offset = eh->plt_got_offset;
5634 /* Get the index in the procedure linkage table which
5635 corresponds to this symbol. This is the index of this symbol
5636 in all the symbols for which we are making plt entries. The
5637 first three entries in .got.plt are reserved; after that
5638 symbols appear in the same order as in .plt. */
5639 plt_index = (got_offset - 12) / 4;
5641 /* Calculate the displacement between the PLT slot and the
5642 entry in the GOT. The eight-byte offset accounts for the
5643 value produced by adding to pc in the first instruction
5645 got_displacement = (sgot->output_section->vma
5646 + sgot->output_offset
5648 - splt->output_section->vma
5649 - splt->output_offset
5653 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5655 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
5657 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5658 splt->contents + h->plt.offset - 4);
5659 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5660 splt->contents + h->plt.offset - 2);
5663 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5664 splt->contents + h->plt.offset + 0);
5665 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5666 splt->contents + h->plt.offset + 4);
5667 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5668 splt->contents + h->plt.offset + 8);
5669 #ifdef FOUR_WORD_PLT
5670 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5671 splt->contents + h->plt.offset + 12);
5674 /* Fill in the entry in the global offset table. */
5675 bfd_put_32 (output_bfd,
5676 (splt->output_section->vma
5677 + splt->output_offset),
5678 sgot->contents + got_offset);
5680 /* Fill in the entry in the .rel.plt section. */
5681 rel.r_offset = (sgot->output_section->vma
5682 + sgot->output_offset
5684 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5687 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5688 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5690 if (!h->def_regular)
5692 /* Mark the symbol as undefined, rather than as defined in
5693 the .plt section. Leave the value alone. */
5694 sym->st_shndx = SHN_UNDEF;
5695 /* If the symbol is weak, we do need to clear the value.
5696 Otherwise, the PLT entry would provide a definition for
5697 the symbol even if the symbol wasn't defined anywhere,
5698 and so the symbol would never be NULL. */
5699 if (!h->ref_regular_nonweak)
5704 if (h->got.offset != (bfd_vma) -1
5705 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
5706 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
5710 Elf_Internal_Rela rel;
5713 /* This symbol has an entry in the global offset table. Set it
5715 sgot = bfd_get_section_by_name (dynobj, ".got");
5716 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5717 BFD_ASSERT (sgot != NULL && srel != NULL);
5719 rel.r_offset = (sgot->output_section->vma
5720 + sgot->output_offset
5721 + (h->got.offset &~ (bfd_vma) 1));
5723 /* If this is a static link, or it is a -Bsymbolic link and the
5724 symbol is defined locally or was forced to be local because
5725 of a version file, we just want to emit a RELATIVE reloc.
5726 The entry in the global offset table will already have been
5727 initialized in the relocate_section function. */
5729 && SYMBOL_REFERENCES_LOCAL (info, h))
5731 BFD_ASSERT((h->got.offset & 1) != 0);
5732 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5736 BFD_ASSERT((h->got.offset & 1) == 0);
5737 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5738 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5741 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5742 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5748 Elf_Internal_Rela rel;
5751 /* This symbol needs a copy reloc. Set it up. */
5752 BFD_ASSERT (h->dynindx != -1
5753 && (h->root.type == bfd_link_hash_defined
5754 || h->root.type == bfd_link_hash_defweak));
5756 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5758 BFD_ASSERT (s != NULL);
5760 rel.r_offset = (h->root.u.def.value
5761 + h->root.u.def.section->output_section->vma
5762 + h->root.u.def.section->output_offset);
5763 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5764 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5765 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5768 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5769 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5770 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5771 sym->st_shndx = SHN_ABS;
5776 /* Finish up the dynamic sections. */
5779 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5785 dynobj = elf_hash_table (info)->dynobj;
5787 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5788 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5789 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5791 if (elf_hash_table (info)->dynamic_sections_created)
5794 Elf32_External_Dyn *dyncon, *dynconend;
5795 struct elf32_arm_link_hash_table *htab;
5797 htab = elf32_arm_hash_table (info);
5798 splt = bfd_get_section_by_name (dynobj, ".plt");
5799 BFD_ASSERT (splt != NULL && sdyn != NULL);
5801 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5802 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5804 for (; dyncon < dynconend; dyncon++)
5806 Elf_Internal_Dyn dyn;
5810 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5821 goto get_vma_if_bpabi;
5824 goto get_vma_if_bpabi;
5827 goto get_vma_if_bpabi;
5829 name = ".gnu.version";
5830 goto get_vma_if_bpabi;
5832 name = ".gnu.version_d";
5833 goto get_vma_if_bpabi;
5835 name = ".gnu.version_r";
5836 goto get_vma_if_bpabi;
5844 s = bfd_get_section_by_name (output_bfd, name);
5845 BFD_ASSERT (s != NULL);
5846 if (!htab->symbian_p)
5847 dyn.d_un.d_ptr = s->vma;
5849 /* In the BPABI, tags in the PT_DYNAMIC section point
5850 at the file offset, not the memory address, for the
5851 convenience of the post linker. */
5852 dyn.d_un.d_ptr = s->filepos;
5853 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5857 if (htab->symbian_p)
5862 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5863 BFD_ASSERT (s != NULL);
5864 dyn.d_un.d_val = s->size;
5865 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5869 if (!htab->symbian_p)
5871 /* My reading of the SVR4 ABI indicates that the
5872 procedure linkage table relocs (DT_JMPREL) should be
5873 included in the overall relocs (DT_REL). This is
5874 what Solaris does. However, UnixWare can not handle
5875 that case. Therefore, we override the DT_RELSZ entry
5876 here to make it not include the JMPREL relocs. Since
5877 the linker script arranges for .rel.plt to follow all
5878 other relocation sections, we don't have to worry
5879 about changing the DT_REL entry. */
5880 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5882 dyn.d_un.d_val -= s->size;
5883 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5891 /* In the BPABI, the DT_REL tag must point at the file
5892 offset, not the VMA, of the first relocation
5893 section. So, we use code similar to that in
5894 elflink.c, but do not check for SHF_ALLOC on the
5895 relcoation section, since relocations sections are
5896 never allocated under the BPABI. The comments above
5897 about Unixware notwithstanding, we include all of the
5898 relocations here. */
5899 if (htab->symbian_p)
5902 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5903 ? SHT_REL : SHT_RELA);
5905 for (i = 1; i < elf_numsections (output_bfd); i++)
5907 Elf_Internal_Shdr *hdr
5908 = elf_elfsections (output_bfd)[i];
5909 if (hdr->sh_type == type)
5911 if (dyn.d_tag == DT_RELSZ
5912 || dyn.d_tag == DT_RELASZ)
5913 dyn.d_un.d_val += hdr->sh_size;
5914 else if ((ufile_ptr) hdr->sh_offset
5915 <= dyn.d_un.d_val - 1)
5916 dyn.d_un.d_val = hdr->sh_offset;
5919 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5923 /* Set the bottom bit of DT_INIT/FINI if the
5924 corresponding function is Thumb. */
5926 name = info->init_function;
5929 name = info->fini_function;
5931 /* If it wasn't set by elf_bfd_final_link
5932 then there is nothing to adjust. */
5933 if (dyn.d_un.d_val != 0)
5935 struct elf_link_hash_entry * eh;
5937 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5938 FALSE, FALSE, TRUE);
5939 if (eh != (struct elf_link_hash_entry *) NULL
5940 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5942 dyn.d_un.d_val |= 1;
5943 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5950 /* Fill in the first entry in the procedure linkage table. */
5951 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5953 bfd_vma got_displacement;
5955 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5956 got_displacement = (sgot->output_section->vma
5957 + sgot->output_offset
5958 - splt->output_section->vma
5959 - splt->output_offset
5962 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5963 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5964 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5965 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5966 #ifdef FOUR_WORD_PLT
5967 /* The displacement value goes in the otherwise-unused last word of
5968 the second entry. */
5969 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5971 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5975 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5976 really seem like the right value. */
5977 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5980 /* Fill in the first three entries in the global offset table. */
5986 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5988 bfd_put_32 (output_bfd,
5989 sdyn->output_section->vma + sdyn->output_offset,
5991 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5992 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5995 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
6002 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
6004 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
6005 struct elf32_arm_link_hash_table *globals;
6007 i_ehdrp = elf_elfheader (abfd);
6009 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
6010 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
6012 i_ehdrp->e_ident[EI_OSABI] = 0;
6013 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
6017 globals = elf32_arm_hash_table (link_info);
6018 if (globals->byteswap_code)
6019 i_ehdrp->e_flags |= EF_ARM_BE8;
6023 static enum elf_reloc_type_class
6024 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
6026 switch ((int) ELF32_R_TYPE (rela->r_info))
6028 case R_ARM_RELATIVE:
6029 return reloc_class_relative;
6030 case R_ARM_JUMP_SLOT:
6031 return reloc_class_plt;
6033 return reloc_class_copy;
6035 return reloc_class_normal;
6039 /* Set the right machine number for an Arm ELF file. */
6042 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
6044 if (hdr->sh_type == SHT_NOTE)
6045 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
6051 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6053 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
6056 /* Return TRUE if this is an unwinding table entry. */
6059 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
6063 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
6064 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
6065 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
6066 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
6070 /* Set the type and flags for an ARM section. We do this by
6071 the section name, which is a hack, but ought to work. */
6074 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
6078 name = bfd_get_section_name (abfd, sec);
6080 if (is_arm_elf_unwind_section_name (abfd, name))
6082 hdr->sh_type = SHT_ARM_EXIDX;
6083 hdr->sh_flags |= SHF_LINK_ORDER;
6088 /* Handle an ARM specific section when reading an object file. This is
6089 called when bfd_section_from_shdr finds a section with an unknown
6093 elf32_arm_section_from_shdr (bfd *abfd,
6094 Elf_Internal_Shdr * hdr,
6098 /* There ought to be a place to keep ELF backend specific flags, but
6099 at the moment there isn't one. We just keep track of the
6100 sections by their name, instead. Fortunately, the ABI gives
6101 names for all the ARM specific sections, so we will probably get
6103 switch (hdr->sh_type)
6112 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6118 /* Called for each symbol. Builds a section map based on mapping symbols.
6119 Does not alter any of the symbols. */
6122 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
6124 Elf_Internal_Sym *elfsym,
6125 asection *input_sec,
6126 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
6129 elf32_arm_section_map *map;
6130 struct elf32_arm_link_hash_table *globals;
6132 /* Only do this on final link. */
6133 if (info->relocatable)
6136 /* Only build a map if we need to byteswap code. */
6137 globals = elf32_arm_hash_table (info);
6138 if (!globals->byteswap_code)
6141 /* We only want mapping symbols. */
6142 if (! bfd_is_arm_mapping_symbol_name (name))
6145 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
6146 map = elf32_arm_section_data (input_sec)->map;
6147 /* TODO: This may be inefficient, but we probably don't usually have many
6148 mapping symbols per section. */
6149 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
6150 elf32_arm_section_data (input_sec)->map = map;
6152 map[mapcount - 1].vma = elfsym->st_value;
6153 map[mapcount - 1].type = name[1];
6158 /* Allocate target specific section data. */
6161 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
6163 struct _arm_elf_section_data *sdata;
6164 bfd_size_type amt = sizeof (*sdata);
6166 sdata = bfd_zalloc (abfd, amt);
6169 sec->used_by_bfd = sdata;
6171 return _bfd_elf_new_section_hook (abfd, sec);
6175 /* Used to order a list of mapping symbols by address. */
6178 elf32_arm_compare_mapping (const void * a, const void * b)
6180 return ((const elf32_arm_section_map *) a)->vma
6181 > ((const elf32_arm_section_map *) b)->vma;
6185 /* Do code byteswapping. Return FALSE afterwards so that the section is
6186 written out as normal. */
6189 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
6193 elf32_arm_section_map *map;
6200 mapcount = elf32_arm_section_data (sec)->mapcount;
6201 map = elf32_arm_section_data (sec)->map;
6206 qsort (map, mapcount, sizeof (elf32_arm_section_map),
6207 elf32_arm_compare_mapping);
6209 offset = sec->output_section->vma + sec->output_offset;
6210 ptr = map[0].vma - offset;
6211 for (i = 0; i < mapcount; i++)
6213 if (i == mapcount - 1)
6216 end = map[i + 1].vma - offset;
6218 switch (map[i].type)
6221 /* Byte swap code words. */
6222 while (ptr + 3 < end)
6224 tmp = contents[ptr];
6225 contents[ptr] = contents[ptr + 3];
6226 contents[ptr + 3] = tmp;
6227 tmp = contents[ptr + 1];
6228 contents[ptr + 1] = contents[ptr + 2];
6229 contents[ptr + 2] = tmp;
6235 /* Byte swap code halfwords. */
6236 while (ptr + 1 < end)
6238 tmp = contents[ptr];
6239 contents[ptr] = contents[ptr + 1];
6240 contents[ptr + 1] = tmp;
6246 /* Leave data alone. */
6255 /* Display STT_ARM_TFUNC symbols as functions. */
6258 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6261 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6263 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
6264 elfsym->symbol.flags |= BSF_FUNCTION;
6268 /* Mangle thumb function symbols as we read them in. */
6271 elf32_arm_swap_symbol_in (bfd * abfd,
6274 Elf_Internal_Sym *dst)
6276 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
6278 /* New EABI objects mark thumb function symbols by setting the low bit of
6279 the address. Turn these into STT_ARM_TFUNC. */
6280 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
6281 && (dst->st_value & 1))
6283 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
6284 dst->st_value &= ~(bfd_vma) 1;
6289 /* Mangle thumb function symbols as we write them out. */
6292 elf32_arm_swap_symbol_out (bfd *abfd,
6293 const Elf_Internal_Sym *src,
6297 Elf_Internal_Sym newsym;
6299 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
6300 of the address set, as per the new EABI. We do this unconditionally
6301 because objcopy does not set the elf header flags until after
6302 it writes out the symbol table. */
6303 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
6306 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
6307 newsym.st_value |= 1;
6311 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
6314 /* Add the PT_ARM_EXIDX program header. */
6317 elf32_arm_modify_segment_map (bfd *abfd,
6318 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6320 struct elf_segment_map *m;
6323 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6324 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6326 /* If there is already a PT_ARM_EXIDX header, then we do not
6327 want to add another one. This situation arises when running
6328 "strip"; the input binary already has the header. */
6329 m = elf_tdata (abfd)->segment_map;
6330 while (m && m->p_type != PT_ARM_EXIDX)
6334 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
6337 m->p_type = PT_ARM_EXIDX;
6339 m->sections[0] = sec;
6341 m->next = elf_tdata (abfd)->segment_map;
6342 elf_tdata (abfd)->segment_map = m;
6349 /* We may add a PT_ARM_EXIDX program header. */
6352 elf32_arm_additional_program_headers (bfd *abfd)
6356 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6357 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6363 /* We use this to override swap_symbol_in and swap_symbol_out. */
6364 const struct elf_size_info elf32_arm_size_info = {
6365 sizeof (Elf32_External_Ehdr),
6366 sizeof (Elf32_External_Phdr),
6367 sizeof (Elf32_External_Shdr),
6368 sizeof (Elf32_External_Rel),
6369 sizeof (Elf32_External_Rela),
6370 sizeof (Elf32_External_Sym),
6371 sizeof (Elf32_External_Dyn),
6372 sizeof (Elf_External_Note),
6376 ELFCLASS32, EV_CURRENT,
6377 bfd_elf32_write_out_phdrs,
6378 bfd_elf32_write_shdrs_and_ehdr,
6379 bfd_elf32_write_relocs,
6380 elf32_arm_swap_symbol_in,
6381 elf32_arm_swap_symbol_out,
6382 bfd_elf32_slurp_reloc_table,
6383 bfd_elf32_slurp_symbol_table,
6384 bfd_elf32_swap_dyn_in,
6385 bfd_elf32_swap_dyn_out,
6386 bfd_elf32_swap_reloc_in,
6387 bfd_elf32_swap_reloc_out,
6388 bfd_elf32_swap_reloca_in,
6389 bfd_elf32_swap_reloca_out
6392 #define ELF_ARCH bfd_arch_arm
6393 #define ELF_MACHINE_CODE EM_ARM
6394 #ifdef __QNXTARGET__
6395 #define ELF_MAXPAGESIZE 0x1000
6397 #define ELF_MAXPAGESIZE 0x8000
6399 #define ELF_MINPAGESIZE 0x1000
6401 #define bfd_elf32_mkobject elf32_arm_mkobject
6403 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
6404 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
6405 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
6406 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
6407 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
6408 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
6409 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
6410 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
6411 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
6413 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
6414 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
6415 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
6416 #define elf_backend_check_relocs elf32_arm_check_relocs
6417 #define elf_backend_relocate_section elf32_arm_relocate_section
6418 #define elf_backend_write_section elf32_arm_write_section
6419 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
6420 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
6421 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
6422 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
6423 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
6424 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
6425 #define elf_backend_post_process_headers elf32_arm_post_process_headers
6426 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
6427 #define elf_backend_object_p elf32_arm_object_p
6428 #define elf_backend_section_flags elf32_arm_section_flags
6429 #define elf_backend_fake_sections elf32_arm_fake_sections
6430 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
6431 #define elf_backend_final_write_processing elf32_arm_final_write_processing
6432 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
6433 #define elf_backend_symbol_processing elf32_arm_symbol_processing
6434 #define elf_backend_size_info elf32_arm_size_info
6435 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
6436 #define elf_backend_additional_program_headers \
6437 elf32_arm_additional_program_headers
6439 #define elf_backend_can_refcount 1
6440 #define elf_backend_can_gc_sections 1
6441 #define elf_backend_plt_readonly 1
6442 #define elf_backend_want_got_plt 1
6443 #define elf_backend_want_plt_sym 0
6444 #define elf_backend_may_use_rel_p 1
6445 #define elf_backend_may_use_rela_p 0
6446 #define elf_backend_default_use_rela_p 0
6447 #define elf_backend_rela_normal 0
6449 #define elf_backend_got_header_size 12
6451 #include "elf32-target.h"
6453 /* VxWorks Targets */
6455 #undef TARGET_LITTLE_SYM
6456 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
6457 #undef TARGET_LITTLE_NAME
6458 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
6459 #undef TARGET_BIG_SYM
6460 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
6461 #undef TARGET_BIG_NAME
6462 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
6464 /* Like elf32_arm_link_hash_table_create -- but overrides
6465 appropriately for VxWorks. */
6466 static struct bfd_link_hash_table *
6467 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
6469 struct bfd_link_hash_table *ret;
6471 ret = elf32_arm_link_hash_table_create (abfd);
6474 struct elf32_arm_link_hash_table *htab
6475 = (struct elf32_arm_link_hash_table *)ret;
6482 #define elf32_bed elf32_arm_vxworks_bed
6484 #undef bfd_elf32_bfd_link_hash_table_create
6485 #define bfd_elf32_bfd_link_hash_table_create \
6486 elf32_arm_vxworks_link_hash_table_create
6488 #undef elf_backend_may_use_rel_p
6489 #define elf_backend_may_use_rel_p 0
6490 #undef elf_backend_may_use_rela_p
6491 #define elf_backend_may_use_rela_p 1
6492 #undef elf_backend_default_use_rela_p
6493 #define elf_backend_default_use_rela_p 1
6494 #undef elf_backend_rela_normal
6495 #define elf_backend_rela_normal 1
6497 #include "elf32-target.h"
6500 /* Symbian OS Targets */
6502 #undef TARGET_LITTLE_SYM
6503 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
6504 #undef TARGET_LITTLE_NAME
6505 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
6506 #undef TARGET_BIG_SYM
6507 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
6508 #undef TARGET_BIG_NAME
6509 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
6511 /* Like elf32_arm_link_hash_table_create -- but overrides
6512 appropriately for Symbian OS. */
6513 static struct bfd_link_hash_table *
6514 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
6516 struct bfd_link_hash_table *ret;
6518 ret = elf32_arm_link_hash_table_create (abfd);
6521 struct elf32_arm_link_hash_table *htab
6522 = (struct elf32_arm_link_hash_table *)ret;
6523 /* There is no PLT header for Symbian OS. */
6524 htab->plt_header_size = 0;
6525 /* The PLT entries are each three instructions. */
6526 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
6527 htab->symbian_p = 1;
6528 /* Symbian uses armv5t or above, so use_blx is always true. */
6530 htab->root.is_relocatable_executable = 1;
6535 static struct bfd_elf_special_section const
6536 elf32_arm_symbian_special_sections[]=
6538 /* In a BPABI executable, the dynamic linking sections do not go in
6539 the loadable read-only segment. The post-linker may wish to
6540 refer to these sections, but they are not part of the final
6542 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
6543 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
6544 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
6545 { ".got", 4, 0, SHT_PROGBITS, 0 },
6546 { ".hash", 5, 0, SHT_HASH, 0 },
6547 /* These sections do not need to be writable as the SymbianOS
6548 postlinker will arrange things so that no dynamic relocation is
6550 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
6551 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
6552 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
6553 { NULL, 0, 0, 0, 0 }
6557 elf32_arm_symbian_begin_write_processing (bfd *abfd,
6558 struct bfd_link_info *link_info
6561 /* BPABI objects are never loaded directly by an OS kernel; they are
6562 processed by a postlinker first, into an OS-specific format. If
6563 the D_PAGED bit is set on the file, BFD will align segments on
6564 page boundaries, so that an OS can directly map the file. With
6565 BPABI objects, that just results in wasted space. In addition,
6566 because we clear the D_PAGED bit, map_sections_to_segments will
6567 recognize that the program headers should not be mapped into any
6568 loadable segment. */
6569 abfd->flags &= ~D_PAGED;
6573 elf32_arm_symbian_modify_segment_map (bfd *abfd,
6574 struct bfd_link_info *info)
6576 struct elf_segment_map *m;
6579 /* BPABI shared libraries and executables should have a PT_DYNAMIC
6580 segment. However, because the .dynamic section is not marked
6581 with SEC_LOAD, the generic ELF code will not create such a
6583 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
6586 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
6587 m->next = elf_tdata (abfd)->segment_map;
6588 elf_tdata (abfd)->segment_map = m;
6591 /* Also call the generic arm routine. */
6592 return elf32_arm_modify_segment_map (abfd, info);
6596 #define elf32_bed elf32_arm_symbian_bed
6598 /* The dynamic sections are not allocated on SymbianOS; the postlinker
6599 will process them and then discard them. */
6600 #undef ELF_DYNAMIC_SEC_FLAGS
6601 #define ELF_DYNAMIC_SEC_FLAGS \
6602 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
6604 #undef bfd_elf32_bfd_link_hash_table_create
6605 #define bfd_elf32_bfd_link_hash_table_create \
6606 elf32_arm_symbian_link_hash_table_create
6608 #undef elf_backend_special_sections
6609 #define elf_backend_special_sections elf32_arm_symbian_special_sections
6611 #undef elf_backend_begin_write_processing
6612 #define elf_backend_begin_write_processing \
6613 elf32_arm_symbian_begin_write_processing
6615 #undef elf_backend_modify_segment_map
6616 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
6618 /* There is no .got section for BPABI objects, and hence no header. */
6619 #undef elf_backend_got_header_size
6620 #define elf_backend_got_header_size 0
6622 /* Similarly, there is no .got.plt section. */
6623 #undef elf_backend_want_got_plt
6624 #define elf_backend_want_got_plt 0
6626 #undef elf_backend_may_use_rel_p
6627 #define elf_backend_may_use_rel_p 1
6628 #undef elf_backend_may_use_rela_p
6629 #define elf_backend_may_use_rela_p 0
6630 #undef elf_backend_default_use_rela_p
6631 #define elf_backend_default_use_rela_p 0
6632 #undef elf_backend_rela_normal
6633 #define elf_backend_rela_normal 0
6635 #include "elf32-target.h"
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