1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
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]))
33 #define elf_info_to_howto 0
34 #define elf_info_to_howto_rel elf32_arm_info_to_howto
36 #define ARM_ELF_ABI_VERSION 0
37 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
39 static reloc_howto_type * elf32_arm_reloc_type_lookup
40 PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
41 static bfd_boolean elf32_arm_nabi_grok_prstatus
42 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
43 static bfd_boolean elf32_arm_nabi_grok_psinfo
44 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
46 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
47 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
50 static reloc_howto_type elf32_arm_howto_table[] =
53 HOWTO (R_ARM_NONE, /* type */
55 0, /* size (0 = byte, 1 = short, 2 = long) */
57 FALSE, /* pc_relative */
59 complain_overflow_dont,/* complain_on_overflow */
60 bfd_elf_generic_reloc, /* special_function */
61 "R_ARM_NONE", /* name */
62 FALSE, /* partial_inplace */
65 FALSE), /* pcrel_offset */
67 HOWTO (R_ARM_PC24, /* type */
69 2, /* size (0 = byte, 1 = short, 2 = long) */
71 TRUE, /* pc_relative */
73 complain_overflow_signed,/* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_ARM_PC24", /* name */
76 FALSE, /* partial_inplace */
77 0x00ffffff, /* src_mask */
78 0x00ffffff, /* dst_mask */
79 TRUE), /* pcrel_offset */
82 HOWTO (R_ARM_ABS32, /* type */
84 2, /* size (0 = byte, 1 = short, 2 = long) */
86 FALSE, /* pc_relative */
88 complain_overflow_bitfield,/* complain_on_overflow */
89 bfd_elf_generic_reloc, /* special_function */
90 "R_ARM_ABS32", /* name */
91 FALSE, /* partial_inplace */
92 0xffffffff, /* src_mask */
93 0xffffffff, /* dst_mask */
94 FALSE), /* pcrel_offset */
96 /* standard 32bit pc-relative reloc */
97 HOWTO (R_ARM_REL32, /* type */
99 2, /* size (0 = byte, 1 = short, 2 = long) */
101 TRUE, /* pc_relative */
103 complain_overflow_bitfield,/* complain_on_overflow */
104 bfd_elf_generic_reloc, /* special_function */
105 "R_ARM_REL32", /* name */
106 FALSE, /* partial_inplace */
107 0xffffffff, /* src_mask */
108 0xffffffff, /* dst_mask */
109 TRUE), /* pcrel_offset */
112 HOWTO (R_ARM_PC13, /* type */
114 0, /* size (0 = byte, 1 = short, 2 = long) */
116 FALSE, /* pc_relative */
118 complain_overflow_bitfield,/* complain_on_overflow */
119 bfd_elf_generic_reloc, /* special_function */
120 "R_ARM_PC13", /* name */
121 FALSE, /* partial_inplace */
122 0x000000ff, /* src_mask */
123 0x000000ff, /* dst_mask */
124 FALSE), /* pcrel_offset */
126 /* 16 bit absolute */
127 HOWTO (R_ARM_ABS16, /* type */
129 1, /* size (0 = byte, 1 = short, 2 = long) */
131 FALSE, /* pc_relative */
133 complain_overflow_bitfield,/* complain_on_overflow */
134 bfd_elf_generic_reloc, /* special_function */
135 "R_ARM_ABS16", /* name */
136 FALSE, /* partial_inplace */
137 0x0000ffff, /* src_mask */
138 0x0000ffff, /* dst_mask */
139 FALSE), /* pcrel_offset */
141 /* 12 bit absolute */
142 HOWTO (R_ARM_ABS12, /* type */
144 2, /* size (0 = byte, 1 = short, 2 = long) */
146 FALSE, /* pc_relative */
148 complain_overflow_bitfield,/* complain_on_overflow */
149 bfd_elf_generic_reloc, /* special_function */
150 "R_ARM_ABS12", /* name */
151 FALSE, /* partial_inplace */
152 0x000008ff, /* src_mask */
153 0x000008ff, /* dst_mask */
154 FALSE), /* pcrel_offset */
156 HOWTO (R_ARM_THM_ABS5, /* type */
158 1, /* size (0 = byte, 1 = short, 2 = long) */
160 FALSE, /* pc_relative */
162 complain_overflow_bitfield,/* complain_on_overflow */
163 bfd_elf_generic_reloc, /* special_function */
164 "R_ARM_THM_ABS5", /* name */
165 FALSE, /* partial_inplace */
166 0x000007e0, /* src_mask */
167 0x000007e0, /* dst_mask */
168 FALSE), /* pcrel_offset */
171 HOWTO (R_ARM_ABS8, /* type */
173 0, /* size (0 = byte, 1 = short, 2 = long) */
175 FALSE, /* pc_relative */
177 complain_overflow_bitfield,/* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_ARM_ABS8", /* name */
180 FALSE, /* partial_inplace */
181 0x000000ff, /* src_mask */
182 0x000000ff, /* dst_mask */
183 FALSE), /* pcrel_offset */
185 HOWTO (R_ARM_SBREL32, /* type */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
189 FALSE, /* pc_relative */
191 complain_overflow_dont,/* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_ARM_SBREL32", /* name */
194 FALSE, /* partial_inplace */
195 0xffffffff, /* src_mask */
196 0xffffffff, /* dst_mask */
197 FALSE), /* pcrel_offset */
199 HOWTO (R_ARM_THM_PC22, /* type */
201 2, /* size (0 = byte, 1 = short, 2 = long) */
203 TRUE, /* pc_relative */
205 complain_overflow_signed,/* complain_on_overflow */
206 bfd_elf_generic_reloc, /* special_function */
207 "R_ARM_THM_PC22", /* name */
208 FALSE, /* partial_inplace */
209 0x07ff07ff, /* src_mask */
210 0x07ff07ff, /* dst_mask */
211 TRUE), /* pcrel_offset */
213 HOWTO (R_ARM_THM_PC8, /* type */
215 1, /* size (0 = byte, 1 = short, 2 = long) */
217 TRUE, /* pc_relative */
219 complain_overflow_signed,/* complain_on_overflow */
220 bfd_elf_generic_reloc, /* special_function */
221 "R_ARM_THM_PC8", /* name */
222 FALSE, /* partial_inplace */
223 0x000000ff, /* src_mask */
224 0x000000ff, /* dst_mask */
225 TRUE), /* pcrel_offset */
227 HOWTO (R_ARM_AMP_VCALL9, /* type */
229 1, /* size (0 = byte, 1 = short, 2 = long) */
231 TRUE, /* pc_relative */
233 complain_overflow_signed,/* complain_on_overflow */
234 bfd_elf_generic_reloc, /* special_function */
235 "R_ARM_AMP_VCALL9", /* name */
236 FALSE, /* partial_inplace */
237 0x000000ff, /* src_mask */
238 0x000000ff, /* dst_mask */
239 TRUE), /* pcrel_offset */
241 HOWTO (R_ARM_SWI24, /* type */
243 0, /* size (0 = byte, 1 = short, 2 = long) */
245 FALSE, /* pc_relative */
247 complain_overflow_signed,/* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_ARM_SWI24", /* name */
250 FALSE, /* partial_inplace */
251 0x00000000, /* src_mask */
252 0x00000000, /* dst_mask */
253 FALSE), /* pcrel_offset */
255 HOWTO (R_ARM_THM_SWI8, /* type */
257 0, /* size (0 = byte, 1 = short, 2 = long) */
259 FALSE, /* pc_relative */
261 complain_overflow_signed,/* complain_on_overflow */
262 bfd_elf_generic_reloc, /* special_function */
263 "R_ARM_SWI8", /* name */
264 FALSE, /* partial_inplace */
265 0x00000000, /* src_mask */
266 0x00000000, /* dst_mask */
267 FALSE), /* pcrel_offset */
269 /* BLX instruction for the ARM. */
270 HOWTO (R_ARM_XPC25, /* type */
272 2, /* size (0 = byte, 1 = short, 2 = long) */
274 TRUE, /* pc_relative */
276 complain_overflow_signed,/* complain_on_overflow */
277 bfd_elf_generic_reloc, /* special_function */
278 "R_ARM_XPC25", /* name */
279 FALSE, /* partial_inplace */
280 0x00ffffff, /* src_mask */
281 0x00ffffff, /* dst_mask */
282 TRUE), /* pcrel_offset */
284 /* BLX instruction for the Thumb. */
285 HOWTO (R_ARM_THM_XPC22, /* type */
287 2, /* size (0 = byte, 1 = short, 2 = long) */
289 TRUE, /* pc_relative */
291 complain_overflow_signed,/* complain_on_overflow */
292 bfd_elf_generic_reloc, /* special_function */
293 "R_ARM_THM_XPC22", /* name */
294 FALSE, /* partial_inplace */
295 0x07ff07ff, /* src_mask */
296 0x07ff07ff, /* dst_mask */
297 TRUE), /* pcrel_offset */
299 /* These next three relocs are not defined, but we need to fill the space. */
301 HOWTO (R_ARM_NONE, /* type */
303 0, /* size (0 = byte, 1 = short, 2 = long) */
305 FALSE, /* pc_relative */
307 complain_overflow_dont,/* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_ARM_unknown_17", /* name */
310 FALSE, /* partial_inplace */
313 FALSE), /* pcrel_offset */
315 HOWTO (R_ARM_NONE, /* type */
317 0, /* size (0 = byte, 1 = short, 2 = long) */
319 FALSE, /* pc_relative */
321 complain_overflow_dont,/* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_ARM_unknown_18", /* name */
324 FALSE, /* partial_inplace */
327 FALSE), /* pcrel_offset */
329 HOWTO (R_ARM_NONE, /* type */
331 0, /* size (0 = byte, 1 = short, 2 = long) */
333 FALSE, /* pc_relative */
335 complain_overflow_dont,/* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_ARM_unknown_19", /* name */
338 FALSE, /* partial_inplace */
341 FALSE), /* pcrel_offset */
343 /* Relocs used in ARM Linux */
345 HOWTO (R_ARM_COPY, /* type */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
349 FALSE, /* pc_relative */
351 complain_overflow_bitfield,/* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_ARM_COPY", /* name */
354 TRUE, /* partial_inplace */
355 0xffffffff, /* src_mask */
356 0xffffffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
359 HOWTO (R_ARM_GLOB_DAT, /* type */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
363 FALSE, /* pc_relative */
365 complain_overflow_bitfield,/* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_ARM_GLOB_DAT", /* name */
368 TRUE, /* partial_inplace */
369 0xffffffff, /* src_mask */
370 0xffffffff, /* dst_mask */
371 FALSE), /* pcrel_offset */
373 HOWTO (R_ARM_JUMP_SLOT, /* type */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
377 FALSE, /* pc_relative */
379 complain_overflow_bitfield,/* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 "R_ARM_JUMP_SLOT", /* name */
382 TRUE, /* partial_inplace */
383 0xffffffff, /* src_mask */
384 0xffffffff, /* dst_mask */
385 FALSE), /* pcrel_offset */
387 HOWTO (R_ARM_RELATIVE, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 FALSE, /* pc_relative */
393 complain_overflow_bitfield,/* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_ARM_RELATIVE", /* name */
396 TRUE, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
401 HOWTO (R_ARM_GOTOFF, /* type */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
405 FALSE, /* pc_relative */
407 complain_overflow_bitfield,/* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_ARM_GOTOFF", /* name */
410 TRUE, /* partial_inplace */
411 0xffffffff, /* src_mask */
412 0xffffffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
415 HOWTO (R_ARM_GOTPC, /* type */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
419 TRUE, /* pc_relative */
421 complain_overflow_bitfield,/* complain_on_overflow */
422 bfd_elf_generic_reloc, /* special_function */
423 "R_ARM_GOTPC", /* name */
424 TRUE, /* partial_inplace */
425 0xffffffff, /* src_mask */
426 0xffffffff, /* dst_mask */
427 TRUE), /* pcrel_offset */
429 HOWTO (R_ARM_GOT32, /* type */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
433 FALSE, /* pc_relative */
435 complain_overflow_bitfield,/* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_ARM_GOT32", /* name */
438 TRUE, /* partial_inplace */
439 0xffffffff, /* src_mask */
440 0xffffffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
443 HOWTO (R_ARM_PLT32, /* type */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
447 TRUE, /* pc_relative */
449 complain_overflow_bitfield,/* complain_on_overflow */
450 bfd_elf_generic_reloc, /* special_function */
451 "R_ARM_PLT32", /* name */
452 TRUE, /* partial_inplace */
453 0x00ffffff, /* src_mask */
454 0x00ffffff, /* dst_mask */
455 TRUE), /* pcrel_offset */
457 HOWTO (R_ARM_CALL, /* type */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
461 TRUE, /* pc_relative */
463 complain_overflow_signed,/* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_ARM_CALL", /* name */
466 FALSE, /* partial_inplace */
467 0x00ffffff, /* src_mask */
468 0x00ffffff, /* dst_mask */
469 TRUE), /* pcrel_offset */
471 HOWTO (R_ARM_JUMP24, /* type */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
475 TRUE, /* pc_relative */
477 complain_overflow_signed,/* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 "R_ARM_JUMP24", /* name */
480 FALSE, /* partial_inplace */
481 0x00ffffff, /* src_mask */
482 0x00ffffff, /* dst_mask */
483 TRUE), /* pcrel_offset */
485 HOWTO (R_ARM_NONE, /* type */
487 0, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE, /* pc_relative */
491 complain_overflow_dont,/* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_ARM_unknown_30", /* name */
494 FALSE, /* partial_inplace */
497 FALSE), /* pcrel_offset */
499 HOWTO (R_ARM_NONE, /* type */
501 0, /* size (0 = byte, 1 = short, 2 = long) */
503 FALSE, /* pc_relative */
505 complain_overflow_dont,/* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_ARM_unknown_31", /* name */
508 FALSE, /* partial_inplace */
511 FALSE), /* pcrel_offset */
513 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
515 2, /* size (0 = byte, 1 = short, 2 = long) */
517 TRUE, /* pc_relative */
519 complain_overflow_dont,/* complain_on_overflow */
520 bfd_elf_generic_reloc, /* special_function */
521 "R_ARM_ALU_PCREL_7_0", /* name */
522 FALSE, /* partial_inplace */
523 0x00000fff, /* src_mask */
524 0x00000fff, /* dst_mask */
525 TRUE), /* pcrel_offset */
527 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
531 TRUE, /* pc_relative */
533 complain_overflow_dont,/* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_ARM_ALU_PCREL_15_8",/* name */
536 FALSE, /* partial_inplace */
537 0x00000fff, /* src_mask */
538 0x00000fff, /* dst_mask */
539 TRUE), /* pcrel_offset */
541 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
545 TRUE, /* pc_relative */
547 complain_overflow_dont,/* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_ARM_ALU_PCREL_23_15",/* name */
550 FALSE, /* partial_inplace */
551 0x00000fff, /* src_mask */
552 0x00000fff, /* dst_mask */
553 TRUE), /* pcrel_offset */
555 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
557 2, /* size (0 = byte, 1 = short, 2 = long) */
559 FALSE, /* pc_relative */
561 complain_overflow_dont,/* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_ARM_LDR_SBREL_11_0",/* name */
564 FALSE, /* partial_inplace */
565 0x00000fff, /* src_mask */
566 0x00000fff, /* dst_mask */
567 FALSE), /* pcrel_offset */
569 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
573 FALSE, /* pc_relative */
575 complain_overflow_dont,/* complain_on_overflow */
576 bfd_elf_generic_reloc, /* special_function */
577 "R_ARM_ALU_SBREL_19_12",/* name */
578 FALSE, /* partial_inplace */
579 0x000ff000, /* src_mask */
580 0x000ff000, /* dst_mask */
581 FALSE), /* pcrel_offset */
583 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE, /* pc_relative */
589 complain_overflow_dont,/* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_ARM_ALU_SBREL_27_20",/* name */
592 FALSE, /* partial_inplace */
593 0x0ff00000, /* src_mask */
594 0x0ff00000, /* dst_mask */
595 FALSE), /* pcrel_offset */
597 HOWTO (R_ARM_TARGET1, /* type */
599 2, /* size (0 = byte, 1 = short, 2 = long) */
601 FALSE, /* pc_relative */
603 complain_overflow_dont,/* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 "R_ARM_TARGET1", /* name */
606 FALSE, /* partial_inplace */
607 0xffffffff, /* src_mask */
608 0xffffffff, /* dst_mask */
609 FALSE), /* pcrel_offset */
611 HOWTO (R_ARM_ROSEGREL32, /* type */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
615 FALSE, /* pc_relative */
617 complain_overflow_dont,/* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_ARM_ROSEGREL32", /* name */
620 FALSE, /* partial_inplace */
621 0xffffffff, /* src_mask */
622 0xffffffff, /* dst_mask */
623 FALSE), /* pcrel_offset */
625 HOWTO (R_ARM_V4BX, /* type */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
629 FALSE, /* pc_relative */
631 complain_overflow_dont,/* complain_on_overflow */
632 bfd_elf_generic_reloc, /* special_function */
633 "R_ARM_V4BX", /* name */
634 FALSE, /* partial_inplace */
635 0xffffffff, /* src_mask */
636 0xffffffff, /* dst_mask */
637 FALSE), /* pcrel_offset */
639 HOWTO (R_ARM_TARGET2, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE, /* pc_relative */
645 complain_overflow_signed,/* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_ARM_TARGET2", /* name */
648 FALSE, /* partial_inplace */
649 0xffffffff, /* src_mask */
650 0xffffffff, /* dst_mask */
651 TRUE), /* pcrel_offset */
653 HOWTO (R_ARM_PREL31, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 TRUE, /* pc_relative */
659 complain_overflow_signed,/* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_ARM_PREL31", /* name */
662 FALSE, /* partial_inplace */
663 0x7fffffff, /* src_mask */
664 0x7fffffff, /* dst_mask */
665 TRUE), /* pcrel_offset */
668 /* GNU extension to record C++ vtable hierarchy */
669 static reloc_howto_type elf32_arm_vtinherit_howto =
670 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
674 FALSE, /* pc_relative */
676 complain_overflow_dont, /* complain_on_overflow */
677 NULL, /* special_function */
678 "R_ARM_GNU_VTINHERIT", /* name */
679 FALSE, /* partial_inplace */
682 FALSE); /* pcrel_offset */
684 /* GNU extension to record C++ vtable member usage */
685 static reloc_howto_type elf32_arm_vtentry_howto =
686 HOWTO (R_ARM_GNU_VTENTRY, /* type */
688 2, /* size (0 = byte, 1 = short, 2 = long) */
690 FALSE, /* pc_relative */
692 complain_overflow_dont, /* complain_on_overflow */
693 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
694 "R_ARM_GNU_VTENTRY", /* name */
695 FALSE, /* partial_inplace */
698 FALSE); /* pcrel_offset */
700 /* 12 bit pc relative */
701 static reloc_howto_type elf32_arm_thm_pc11_howto =
702 HOWTO (R_ARM_THM_PC11, /* type */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
706 TRUE, /* pc_relative */
708 complain_overflow_signed, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_ARM_THM_PC11", /* name */
711 FALSE, /* partial_inplace */
712 0x000007ff, /* src_mask */
713 0x000007ff, /* dst_mask */
714 TRUE); /* pcrel_offset */
716 /* 12 bit pc relative */
717 static reloc_howto_type elf32_arm_thm_pc9_howto =
718 HOWTO (R_ARM_THM_PC9, /* type */
720 1, /* size (0 = byte, 1 = short, 2 = long) */
722 TRUE, /* pc_relative */
724 complain_overflow_signed, /* complain_on_overflow */
725 bfd_elf_generic_reloc, /* special_function */
726 "R_ARM_THM_PC9", /* name */
727 FALSE, /* partial_inplace */
728 0x000000ff, /* src_mask */
729 0x000000ff, /* dst_mask */
730 TRUE); /* pcrel_offset */
732 /* Place relative GOT-indirect. */
733 static reloc_howto_type elf32_arm_got_prel =
734 HOWTO (R_ARM_GOT_PREL, /* type */
736 2, /* size (0 = byte, 1 = short, 2 = long) */
738 TRUE, /* pc_relative */
740 complain_overflow_dont, /* complain_on_overflow */
741 bfd_elf_generic_reloc, /* special_function */
742 "R_ARM_GOT_PREL", /* name */
743 FALSE, /* partial_inplace */
744 0xffffffff, /* src_mask */
745 0xffffffff, /* dst_mask */
746 TRUE); /* pcrel_offset */
748 /* Currently unused relocations. */
749 static reloc_howto_type elf32_arm_r_howto[4] =
751 HOWTO (R_ARM_RREL32, /* type */
753 0, /* size (0 = byte, 1 = short, 2 = long) */
755 FALSE, /* pc_relative */
757 complain_overflow_dont,/* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_ARM_RREL32", /* name */
760 FALSE, /* partial_inplace */
763 FALSE), /* pcrel_offset */
765 HOWTO (R_ARM_RABS32, /* type */
767 0, /* size (0 = byte, 1 = short, 2 = long) */
769 FALSE, /* pc_relative */
771 complain_overflow_dont,/* complain_on_overflow */
772 bfd_elf_generic_reloc, /* special_function */
773 "R_ARM_RABS32", /* name */
774 FALSE, /* partial_inplace */
777 FALSE), /* pcrel_offset */
779 HOWTO (R_ARM_RPC24, /* type */
781 0, /* size (0 = byte, 1 = short, 2 = long) */
783 FALSE, /* pc_relative */
785 complain_overflow_dont,/* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_ARM_RPC24", /* name */
788 FALSE, /* partial_inplace */
791 FALSE), /* pcrel_offset */
793 HOWTO (R_ARM_RBASE, /* type */
795 0, /* size (0 = byte, 1 = short, 2 = long) */
797 FALSE, /* pc_relative */
799 complain_overflow_dont,/* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_ARM_RBASE", /* name */
802 FALSE, /* partial_inplace */
805 FALSE) /* pcrel_offset */
808 static reloc_howto_type *
809 elf32_arm_howto_from_type (unsigned int r_type)
811 if (r_type < NUM_ELEM (elf32_arm_howto_table))
812 return &elf32_arm_howto_table[r_type];
817 return &elf32_arm_got_prel;
819 case R_ARM_GNU_VTINHERIT:
820 return &elf32_arm_vtinherit_howto;
822 case R_ARM_GNU_VTENTRY:
823 return &elf32_arm_vtentry_howto;
826 return &elf32_arm_thm_pc11_howto;
829 return &elf32_arm_thm_pc9_howto;
835 return &elf32_arm_r_howto[r_type - R_ARM_RREL32];
843 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
844 Elf_Internal_Rela * elf_reloc)
848 r_type = ELF32_R_TYPE (elf_reloc->r_info);
849 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
852 struct elf32_arm_reloc_map
854 bfd_reloc_code_real_type bfd_reloc_val;
855 unsigned char elf_reloc_val;
858 /* All entries in this list must also be present in elf32_arm_howto_table. */
859 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
861 {BFD_RELOC_NONE, R_ARM_NONE},
862 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
863 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
864 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
865 {BFD_RELOC_32, R_ARM_ABS32},
866 {BFD_RELOC_32_PCREL, R_ARM_REL32},
867 {BFD_RELOC_8, R_ARM_ABS8},
868 {BFD_RELOC_16, R_ARM_ABS16},
869 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
870 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
871 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22},
872 {BFD_RELOC_ARM_COPY, R_ARM_COPY},
873 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
874 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
875 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
876 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF},
877 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
878 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
879 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
880 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
881 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
882 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
883 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
884 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}
887 static reloc_howto_type *
888 elf32_arm_reloc_type_lookup (abfd, code)
889 bfd *abfd ATTRIBUTE_UNUSED;
890 bfd_reloc_code_real_type code;
896 case BFD_RELOC_VTABLE_INHERIT:
897 return & elf32_arm_vtinherit_howto;
899 case BFD_RELOC_VTABLE_ENTRY:
900 return & elf32_arm_vtentry_howto;
902 case BFD_RELOC_THUMB_PCREL_BRANCH12:
903 return & elf32_arm_thm_pc11_howto;
905 case BFD_RELOC_THUMB_PCREL_BRANCH9:
906 return & elf32_arm_thm_pc9_howto;
909 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
910 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
911 return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
917 /* Support for core dump NOTE sections */
919 elf32_arm_nabi_grok_prstatus (abfd, note)
921 Elf_Internal_Note *note;
926 switch (note->descsz)
931 case 148: /* Linux/ARM 32-bit*/
933 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
936 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
945 /* Make a ".reg/999" section. */
946 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
947 size, note->descpos + offset);
951 elf32_arm_nabi_grok_psinfo (abfd, note)
953 Elf_Internal_Note *note;
955 switch (note->descsz)
960 case 124: /* Linux/ARM elf_prpsinfo */
961 elf_tdata (abfd)->core_program
962 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
963 elf_tdata (abfd)->core_command
964 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
967 /* Note that for some reason, a spurious space is tacked
968 onto the end of the args in some (at least one anyway)
969 implementations, so strip it off if it exists. */
972 char *command = elf_tdata (abfd)->core_command;
973 int n = strlen (command);
975 if (0 < n && command[n - 1] == ' ')
976 command[n - 1] = '\0';
982 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
983 #define TARGET_LITTLE_NAME "elf32-littlearm"
984 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
985 #define TARGET_BIG_NAME "elf32-bigarm"
987 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
988 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
994 typedef unsigned long int insn32;
995 typedef unsigned short int insn16;
997 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
998 #define INTERWORK_FLAG(abfd) \
999 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
1000 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1002 /* The linker script knows the section names for placement.
1003 The entry_names are used to do simple name mangling on the stubs.
1004 Given a function name, and its type, the stub can be found. The
1005 name can be changed. The only requirement is the %s be present. */
1006 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1007 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1009 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1010 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1012 /* The name of the dynamic interpreter. This is put in the .interp
1014 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1016 #ifdef FOUR_WORD_PLT
1018 /* The first entry in a procedure linkage table looks like
1019 this. It is set up so that any shared library function that is
1020 called before the relocation has been set up calls the dynamic
1022 static const bfd_vma elf32_arm_plt0_entry [] =
1024 0xe52de004, /* str lr, [sp, #-4]! */
1025 0xe59fe010, /* ldr lr, [pc, #16] */
1026 0xe08fe00e, /* add lr, pc, lr */
1027 0xe5bef008, /* ldr pc, [lr, #8]! */
1030 /* Subsequent entries in a procedure linkage table look like
1032 static const bfd_vma elf32_arm_plt_entry [] =
1034 0xe28fc600, /* add ip, pc, #NN */
1035 0xe28cca00, /* add ip, ip, #NN */
1036 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1037 0x00000000, /* unused */
1042 /* The first entry in a procedure linkage table looks like
1043 this. It is set up so that any shared library function that is
1044 called before the relocation has been set up calls the dynamic
1046 static const bfd_vma elf32_arm_plt0_entry [] =
1048 0xe52de004, /* str lr, [sp, #-4]! */
1049 0xe59fe004, /* ldr lr, [pc, #4] */
1050 0xe08fe00e, /* add lr, pc, lr */
1051 0xe5bef008, /* ldr pc, [lr, #8]! */
1052 0x00000000, /* &GOT[0] - . */
1055 /* Subsequent entries in a procedure linkage table look like
1057 static const bfd_vma elf32_arm_plt_entry [] =
1059 0xe28fc600, /* add ip, pc, #0xNN00000 */
1060 0xe28cca00, /* add ip, ip, #0xNN000 */
1061 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1066 /* The entries in a PLT when using a DLL-based target with multiple
1068 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1070 0xe51ff004, /* ldr pr, [pc, #-4] */
1071 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1074 /* Used to build a map of a section. This is required for mixed-endian
1077 typedef struct elf32_elf_section_map
1082 elf32_arm_section_map;
1084 struct _arm_elf_section_data
1086 struct bfd_elf_section_data elf;
1088 elf32_arm_section_map *map;
1091 #define elf32_arm_section_data(sec) \
1092 ((struct _arm_elf_section_data *) elf_section_data (sec))
1094 /* The ARM linker needs to keep track of the number of relocs that it
1095 decides to copy in check_relocs for each symbol. This is so that
1096 it can discard PC relative relocs if it doesn't need them when
1097 linking with -Bsymbolic. We store the information in a field
1098 extending the regular ELF linker hash table. */
1100 /* This structure keeps track of the number of PC relative relocs we
1101 have copied for a given symbol. */
1102 struct elf32_arm_relocs_copied
1105 struct elf32_arm_relocs_copied * next;
1106 /* A section in dynobj. */
1108 /* Number of relocs copied in this section. */
1109 bfd_size_type count;
1112 /* Arm ELF linker hash entry. */
1113 struct elf32_arm_link_hash_entry
1115 struct elf_link_hash_entry root;
1117 /* Number of PC relative relocs copied for this symbol. */
1118 struct elf32_arm_relocs_copied * relocs_copied;
1121 /* Traverse an arm ELF linker hash table. */
1122 #define elf32_arm_link_hash_traverse(table, func, info) \
1123 (elf_link_hash_traverse \
1125 (bfd_boolean (*) (struct elf_link_hash_entry *, void *))) (func), \
1128 /* Get the ARM elf linker hash table from a link_info structure. */
1129 #define elf32_arm_hash_table(info) \
1130 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1132 /* ARM ELF linker hash table. */
1133 struct elf32_arm_link_hash_table
1135 /* The main hash table. */
1136 struct elf_link_hash_table root;
1138 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1139 bfd_size_type thumb_glue_size;
1141 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1142 bfd_size_type arm_glue_size;
1144 /* An arbitrary input BFD chosen to hold the glue sections. */
1145 bfd * bfd_of_glue_owner;
1147 /* A boolean indicating whether knowledge of the ARM's pipeline
1148 length should be applied by the linker. */
1149 int no_pipeline_knowledge;
1151 /* Nonzero to output a BE8 image. */
1154 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1155 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1158 /* The relocation to use for R_ARM_TARGET2 relocations. */
1161 /* The number of bytes in the initial entry in the PLT. */
1162 bfd_size_type plt_header_size;
1164 /* The number of bytes in the subsequent PLT etries. */
1165 bfd_size_type plt_entry_size;
1167 /* True if the target system is Symbian OS. */
1170 /* Short-cuts to get to dynamic linker sections. */
1179 /* Small local sym to section mapping cache. */
1180 struct sym_sec_cache sym_sec;
1183 /* Create an entry in an ARM ELF linker hash table. */
1185 static struct bfd_hash_entry *
1186 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1187 struct bfd_hash_table * table,
1188 const char * string)
1190 struct elf32_arm_link_hash_entry * ret =
1191 (struct elf32_arm_link_hash_entry *) entry;
1193 /* Allocate the structure if it has not already been allocated by a
1195 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1196 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1198 return (struct bfd_hash_entry *) ret;
1200 /* Call the allocation method of the superclass. */
1201 ret = ((struct elf32_arm_link_hash_entry *)
1202 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1205 ret->relocs_copied = NULL;
1207 return (struct bfd_hash_entry *) ret;
1210 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1211 shortcuts to them in our hash table. */
1214 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1216 struct elf32_arm_link_hash_table *htab;
1218 htab = elf32_arm_hash_table (info);
1219 /* BPABI objects never have a GOT, or associated sections. */
1220 if (htab->symbian_p)
1223 if (! _bfd_elf_create_got_section (dynobj, info))
1226 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1227 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1228 if (!htab->sgot || !htab->sgotplt)
1231 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1232 if (htab->srelgot == NULL
1233 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1234 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1235 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1237 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1242 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1243 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1247 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1249 struct elf32_arm_link_hash_table *htab;
1251 htab = elf32_arm_hash_table (info);
1252 if (!htab->sgot && !create_got_section (dynobj, info))
1255 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1258 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1259 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1260 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1262 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1267 || (!info->shared && !htab->srelbss))
1273 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1276 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1277 struct elf_link_hash_entry *dir,
1278 struct elf_link_hash_entry *ind)
1280 struct elf32_arm_link_hash_entry *edir, *eind;
1282 edir = (struct elf32_arm_link_hash_entry *) dir;
1283 eind = (struct elf32_arm_link_hash_entry *) ind;
1285 if (eind->relocs_copied != NULL)
1287 if (edir->relocs_copied != NULL)
1289 struct elf32_arm_relocs_copied **pp;
1290 struct elf32_arm_relocs_copied *p;
1292 if (ind->root.type == bfd_link_hash_indirect)
1295 /* Add reloc counts against the weak sym to the strong sym
1296 list. Merge any entries against the same section. */
1297 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1299 struct elf32_arm_relocs_copied *q;
1301 for (q = edir->relocs_copied; q != NULL; q = q->next)
1302 if (q->section == p->section)
1304 q->count += p->count;
1311 *pp = edir->relocs_copied;
1314 edir->relocs_copied = eind->relocs_copied;
1315 eind->relocs_copied = NULL;
1318 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1321 /* Create an ARM elf linker hash table. */
1323 static struct bfd_link_hash_table *
1324 elf32_arm_link_hash_table_create (bfd *abfd)
1326 struct elf32_arm_link_hash_table *ret;
1327 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1329 ret = bfd_malloc (amt);
1333 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1334 elf32_arm_link_hash_newfunc))
1341 ret->sgotplt = NULL;
1342 ret->srelgot = NULL;
1344 ret->srelplt = NULL;
1345 ret->sdynbss = NULL;
1346 ret->srelbss = NULL;
1347 ret->thumb_glue_size = 0;
1348 ret->arm_glue_size = 0;
1349 ret->bfd_of_glue_owner = NULL;
1350 ret->no_pipeline_knowledge = 0;
1351 ret->byteswap_code = 0;
1352 ret->target1_is_rel = 0;
1353 ret->target2_reloc = R_ARM_NONE;
1354 #ifdef FOUR_WORD_PLT
1355 ret->plt_header_size = 16;
1356 ret->plt_entry_size = 16;
1358 ret->plt_header_size = 20;
1359 ret->plt_entry_size = 12;
1362 ret->sym_sec.abfd = NULL;
1364 return &ret->root.root;
1367 /* Locate the Thumb encoded calling stub for NAME. */
1369 static struct elf_link_hash_entry *
1370 find_thumb_glue (struct bfd_link_info *link_info,
1375 struct elf_link_hash_entry *hash;
1376 struct elf32_arm_link_hash_table *hash_table;
1378 /* We need a pointer to the armelf specific hash table. */
1379 hash_table = elf32_arm_hash_table (link_info);
1381 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1382 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1384 BFD_ASSERT (tmp_name);
1386 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1388 hash = elf_link_hash_lookup
1389 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1392 /* xgettext:c-format */
1393 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1394 input_bfd, tmp_name, name);
1401 /* Locate the ARM encoded calling stub for NAME. */
1403 static struct elf_link_hash_entry *
1404 find_arm_glue (struct bfd_link_info *link_info,
1409 struct elf_link_hash_entry *myh;
1410 struct elf32_arm_link_hash_table *hash_table;
1412 /* We need a pointer to the elfarm specific hash table. */
1413 hash_table = elf32_arm_hash_table (link_info);
1415 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1416 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1418 BFD_ASSERT (tmp_name);
1420 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1422 myh = elf_link_hash_lookup
1423 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1426 /* xgettext:c-format */
1427 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1428 input_bfd, tmp_name, name);
1439 ldr r12, __func_addr
1442 .word func @ behave as if you saw a ARM_32 reloc. */
1444 #define ARM2THUMB_GLUE_SIZE 12
1445 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1446 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1447 static const insn32 a2t3_func_addr_insn = 0x00000001;
1449 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1453 __func_from_thumb: __func_from_thumb:
1455 nop ldr r6, __func_addr
1457 __func_change_to_arm: bx r6
1459 __func_back_to_thumb:
1465 #define THUMB2ARM_GLUE_SIZE 8
1466 static const insn16 t2a1_bx_pc_insn = 0x4778;
1467 static const insn16 t2a2_noop_insn = 0x46c0;
1468 static const insn32 t2a3_b_insn = 0xea000000;
1470 #ifndef ELFARM_NABI_C_INCLUDED
1472 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
1476 struct elf32_arm_link_hash_table * globals;
1478 globals = elf32_arm_hash_table (info);
1480 BFD_ASSERT (globals != NULL);
1482 if (globals->arm_glue_size != 0)
1484 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1486 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1487 ARM2THUMB_GLUE_SECTION_NAME);
1489 BFD_ASSERT (s != NULL);
1491 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
1493 s->size = globals->arm_glue_size;
1497 if (globals->thumb_glue_size != 0)
1499 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1501 s = bfd_get_section_by_name
1502 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1504 BFD_ASSERT (s != NULL);
1506 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
1508 s->size = globals->thumb_glue_size;
1516 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1517 struct elf_link_hash_entry * h)
1519 const char * name = h->root.root.string;
1522 struct elf_link_hash_entry * myh;
1523 struct bfd_link_hash_entry * bh;
1524 struct elf32_arm_link_hash_table * globals;
1527 globals = elf32_arm_hash_table (link_info);
1529 BFD_ASSERT (globals != NULL);
1530 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1532 s = bfd_get_section_by_name
1533 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1535 BFD_ASSERT (s != NULL);
1537 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1539 BFD_ASSERT (tmp_name);
1541 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1543 myh = elf_link_hash_lookup
1544 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
1548 /* We've already seen this guy. */
1553 /* The only trick here is using hash_table->arm_glue_size as the value.
1554 Even though the section isn't allocated yet, this is where we will be
1557 val = globals->arm_glue_size + 1;
1558 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1559 tmp_name, BSF_GLOBAL, s, val,
1560 NULL, TRUE, FALSE, &bh);
1564 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
1570 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1571 struct elf_link_hash_entry *h)
1573 const char *name = h->root.root.string;
1576 struct elf_link_hash_entry *myh;
1577 struct bfd_link_hash_entry *bh;
1578 struct elf32_arm_link_hash_table *hash_table;
1582 hash_table = elf32_arm_hash_table (link_info);
1584 BFD_ASSERT (hash_table != NULL);
1585 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1587 s = bfd_get_section_by_name
1588 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1590 BFD_ASSERT (s != NULL);
1592 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1593 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1595 BFD_ASSERT (tmp_name);
1597 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1599 myh = elf_link_hash_lookup
1600 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1604 /* We've already seen this guy. */
1610 val = hash_table->thumb_glue_size + 1;
1611 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1612 tmp_name, BSF_GLOBAL, s, val,
1613 NULL, TRUE, FALSE, &bh);
1615 /* If we mark it 'Thumb', the disassembler will do a better job. */
1616 myh = (struct elf_link_hash_entry *) bh;
1617 bind = ELF_ST_BIND (myh->type);
1618 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
1622 #define CHANGE_TO_ARM "__%s_change_to_arm"
1623 #define BACK_FROM_ARM "__%s_back_from_arm"
1625 /* Allocate another symbol to mark where we switch to Arm mode. */
1626 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1627 + strlen (CHANGE_TO_ARM) + 1);
1629 BFD_ASSERT (tmp_name);
1631 sprintf (tmp_name, CHANGE_TO_ARM, name);
1634 val = hash_table->thumb_glue_size + 4,
1635 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1636 tmp_name, BSF_LOCAL, s, val,
1637 NULL, TRUE, FALSE, &bh);
1641 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1646 /* Add the glue sections to ABFD. This function is called from the
1647 linker scripts in ld/emultempl/{armelf}.em. */
1650 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1651 struct bfd_link_info *info)
1656 /* If we are only performing a partial
1657 link do not bother adding the glue. */
1658 if (info->relocatable)
1661 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1665 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1666 will prevent elf_link_input_bfd() from processing the contents
1668 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
1670 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1673 || !bfd_set_section_flags (abfd, sec, flags)
1674 || !bfd_set_section_alignment (abfd, sec, 2))
1677 /* Set the gc mark to prevent the section from being removed by garbage
1678 collection, despite the fact that no relocs refer to this section. */
1682 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1686 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1687 | SEC_CODE | SEC_READONLY;
1689 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1692 || !bfd_set_section_flags (abfd, sec, flags)
1693 || !bfd_set_section_alignment (abfd, sec, 2))
1702 /* Select a BFD to be used to hold the sections used by the glue code.
1703 This function is called from the linker scripts in ld/emultempl/
1707 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
1709 struct elf32_arm_link_hash_table *globals;
1711 /* If we are only performing a partial link
1712 do not bother getting a bfd to hold the glue. */
1713 if (info->relocatable)
1716 globals = elf32_arm_hash_table (info);
1718 BFD_ASSERT (globals != NULL);
1720 if (globals->bfd_of_glue_owner != NULL)
1723 /* Save the bfd for later use. */
1724 globals->bfd_of_glue_owner = abfd;
1730 bfd_elf32_arm_process_before_allocation (bfd *abfd,
1731 struct bfd_link_info *link_info,
1732 int no_pipeline_knowledge,
1735 Elf_Internal_Shdr *symtab_hdr;
1736 Elf_Internal_Rela *internal_relocs = NULL;
1737 Elf_Internal_Rela *irel, *irelend;
1738 bfd_byte *contents = NULL;
1741 struct elf32_arm_link_hash_table *globals;
1743 /* If we are only performing a partial link do not bother
1744 to construct any glue. */
1745 if (link_info->relocatable)
1748 /* Here we have a bfd that is to be included on the link. We have a hook
1749 to do reloc rummaging, before section sizes are nailed down. */
1750 globals = elf32_arm_hash_table (link_info);
1752 BFD_ASSERT (globals != NULL);
1753 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1755 globals->no_pipeline_knowledge = no_pipeline_knowledge;
1757 if (byteswap_code && !bfd_big_endian (abfd))
1759 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1763 globals->byteswap_code = byteswap_code;
1765 /* Rummage around all the relocs and map the glue vectors. */
1766 sec = abfd->sections;
1771 for (; sec != NULL; sec = sec->next)
1773 if (sec->reloc_count == 0)
1776 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1778 /* Load the relocs. */
1780 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
1781 (Elf_Internal_Rela *) NULL, FALSE);
1783 if (internal_relocs == NULL)
1786 irelend = internal_relocs + sec->reloc_count;
1787 for (irel = internal_relocs; irel < irelend; irel++)
1790 unsigned long r_index;
1792 struct elf_link_hash_entry *h;
1794 r_type = ELF32_R_TYPE (irel->r_info);
1795 r_index = ELF32_R_SYM (irel->r_info);
1797 /* These are the only relocation types we care about. */
1798 if ( r_type != R_ARM_PC24
1800 && r_type != R_ARM_CALL
1801 && r_type != R_ARM_JUMP24
1803 && r_type != R_ARM_THM_PC22)
1806 /* Get the section contents if we haven't done so already. */
1807 if (contents == NULL)
1809 /* Get cached copy if it exists. */
1810 if (elf_section_data (sec)->this_hdr.contents != NULL)
1811 contents = elf_section_data (sec)->this_hdr.contents;
1814 /* Go get them off disk. */
1815 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
1820 /* If the relocation is not against a symbol it cannot concern us. */
1823 /* We don't care about local symbols. */
1824 if (r_index < symtab_hdr->sh_info)
1827 /* This is an external symbol. */
1828 r_index -= symtab_hdr->sh_info;
1829 h = (struct elf_link_hash_entry *)
1830 elf_sym_hashes (abfd)[r_index];
1832 /* If the relocation is against a static symbol it must be within
1833 the current section and so cannot be a cross ARM/Thumb relocation. */
1844 /* This one is a call from arm code. We need to look up
1845 the target of the call. If it is a thumb target, we
1847 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
1848 record_arm_to_thumb_glue (link_info, h);
1851 case R_ARM_THM_PC22:
1852 /* This one is a call from thumb code. We look
1853 up the target of the call. If it is not a thumb
1854 target, we insert glue. */
1855 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
1856 record_thumb_to_arm_glue (link_info, h);
1864 if (contents != NULL
1865 && elf_section_data (sec)->this_hdr.contents != contents)
1869 if (internal_relocs != NULL
1870 && elf_section_data (sec)->relocs != internal_relocs)
1871 free (internal_relocs);
1872 internal_relocs = NULL;
1878 if (contents != NULL
1879 && elf_section_data (sec)->this_hdr.contents != contents)
1881 if (internal_relocs != NULL
1882 && elf_section_data (sec)->relocs != internal_relocs)
1883 free (internal_relocs);
1891 /* Set target relocation values needed during linking. */
1894 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
1896 char * target2_type)
1898 struct elf32_arm_link_hash_table *globals;
1900 globals = elf32_arm_hash_table (link_info);
1902 globals->target1_is_rel = target1_is_rel;
1903 if (strcmp (target2_type, "rel") == 0)
1904 globals->target2_reloc = R_ARM_REL32;
1905 else if (strcmp (target2_type, "abs") == 0)
1906 globals->target2_reloc = R_ARM_ABS32;
1907 else if (strcmp (target2_type, "got-rel") == 0)
1908 globals->target2_reloc = R_ARM_GOT_PREL;
1911 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
1917 /* The thumb form of a long branch is a bit finicky, because the offset
1918 encoding is split over two fields, each in it's own instruction. They
1919 can occur in any order. So given a thumb form of long branch, and an
1920 offset, insert the offset into the thumb branch and return finished
1923 It takes two thumb instructions to encode the target address. Each has
1924 11 bits to invest. The upper 11 bits are stored in one (identified by
1925 H-0.. see below), the lower 11 bits are stored in the other (identified
1928 Combine together and shifted left by 1 (it's a half word address) and
1932 H-0, upper address-0 = 000
1934 H-1, lower address-0 = 800
1936 They can be ordered either way, but the arm tools I've seen always put
1937 the lower one first. It probably doesn't matter. krk@cygnus.com
1939 XXX: Actually the order does matter. The second instruction (H-1)
1940 moves the computed address into the PC, so it must be the second one
1941 in the sequence. The problem, however is that whilst little endian code
1942 stores the instructions in HI then LOW order, big endian code does the
1943 reverse. nickc@cygnus.com. */
1945 #define LOW_HI_ORDER 0xF800F000
1946 #define HI_LOW_ORDER 0xF000F800
1949 insert_thumb_branch (insn32 br_insn, int rel_off)
1951 unsigned int low_bits;
1952 unsigned int high_bits;
1954 BFD_ASSERT ((rel_off & 1) != 1);
1956 rel_off >>= 1; /* Half word aligned address. */
1957 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
1958 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
1960 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
1961 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
1962 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
1963 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
1965 /* FIXME: abort is probably not the right call. krk@cygnus.com */
1966 abort (); /* Error - not a valid branch instruction form. */
1971 /* Thumb code calling an ARM function. */
1974 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
1978 asection * input_section,
1979 bfd_byte * hit_data,
1982 bfd_signed_vma addend,
1987 unsigned long int tmp;
1988 long int ret_offset;
1989 struct elf_link_hash_entry * myh;
1990 struct elf32_arm_link_hash_table * globals;
1992 myh = find_thumb_glue (info, name, input_bfd);
1996 globals = elf32_arm_hash_table (info);
1998 BFD_ASSERT (globals != NULL);
1999 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2001 my_offset = myh->root.u.def.value;
2003 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2004 THUMB2ARM_GLUE_SECTION_NAME);
2006 BFD_ASSERT (s != NULL);
2007 BFD_ASSERT (s->contents != NULL);
2008 BFD_ASSERT (s->output_section != NULL);
2010 if ((my_offset & 0x01) == 0x01)
2013 && sym_sec->owner != NULL
2014 && !INTERWORK_FLAG (sym_sec->owner))
2016 (*_bfd_error_handler)
2017 (_("%B(%s): warning: interworking not enabled.\n"
2018 " first occurrence: %B: thumb call to arm"),
2019 sym_sec->owner, input_bfd, name);
2025 myh->root.u.def.value = my_offset;
2027 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2028 s->contents + my_offset);
2030 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2031 s->contents + my_offset + 2);
2034 /* Address of destination of the stub. */
2035 ((bfd_signed_vma) val)
2037 /* Offset from the start of the current section
2038 to the start of the stubs. */
2040 /* Offset of the start of this stub from the start of the stubs. */
2042 /* Address of the start of the current section. */
2043 + s->output_section->vma)
2044 /* The branch instruction is 4 bytes into the stub. */
2046 /* ARM branches work from the pc of the instruction + 8. */
2049 bfd_put_32 (output_bfd,
2050 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2051 s->contents + my_offset + 4);
2054 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2056 /* Now go back and fix up the original BL insn to point to here. */
2058 /* Address of where the stub is located. */
2059 (s->output_section->vma + s->output_offset + my_offset)
2060 /* Address of where the BL is located. */
2061 - (input_section->output_section->vma + input_section->output_offset
2063 /* Addend in the relocation. */
2065 /* Biassing for PC-relative addressing. */
2068 tmp = bfd_get_32 (input_bfd, hit_data
2069 - input_section->vma);
2071 bfd_put_32 (output_bfd,
2072 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2073 hit_data - input_section->vma);
2078 /* Arm code calling a Thumb function. */
2081 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2085 asection * input_section,
2086 bfd_byte * hit_data,
2089 bfd_signed_vma addend,
2092 unsigned long int tmp;
2095 long int ret_offset;
2096 struct elf_link_hash_entry * myh;
2097 struct elf32_arm_link_hash_table * globals;
2099 myh = find_arm_glue (info, name, input_bfd);
2103 globals = elf32_arm_hash_table (info);
2105 BFD_ASSERT (globals != NULL);
2106 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2108 my_offset = myh->root.u.def.value;
2109 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2110 ARM2THUMB_GLUE_SECTION_NAME);
2111 BFD_ASSERT (s != NULL);
2112 BFD_ASSERT (s->contents != NULL);
2113 BFD_ASSERT (s->output_section != NULL);
2115 if ((my_offset & 0x01) == 0x01)
2118 && sym_sec->owner != NULL
2119 && !INTERWORK_FLAG (sym_sec->owner))
2121 (*_bfd_error_handler)
2122 (_("%B(%s): warning: interworking not enabled.\n"
2123 " first occurrence: %B: arm call to thumb"),
2124 sym_sec->owner, input_bfd, name);
2128 myh->root.u.def.value = my_offset;
2130 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2131 s->contents + my_offset);
2133 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2134 s->contents + my_offset + 4);
2136 /* It's a thumb address. Add the low order bit. */
2137 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2138 s->contents + my_offset + 8);
2141 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2143 tmp = bfd_get_32 (input_bfd, hit_data);
2144 tmp = tmp & 0xFF000000;
2146 /* Somehow these are both 4 too far, so subtract 8. */
2147 ret_offset = (s->output_offset
2149 + s->output_section->vma
2150 - (input_section->output_offset
2151 + input_section->output_section->vma
2155 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2157 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2164 /* Some relocations map to different relocations depending on the
2165 target. Return the real relocation. */
2167 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2173 if (globals->target1_is_rel)
2179 return globals->target2_reloc;
2185 #endif /* OLD_ARM_ABI */
2188 /* Perform a relocation as part of a final link. */
2190 static bfd_reloc_status_type
2191 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2194 asection * input_section,
2195 bfd_byte * contents,
2196 Elf_Internal_Rela * rel,
2198 struct bfd_link_info * info,
2200 const char * sym_name,
2202 struct elf_link_hash_entry * h)
2204 unsigned long r_type = howto->type;
2205 unsigned long r_symndx;
2206 bfd_byte * hit_data = contents + rel->r_offset;
2207 bfd * dynobj = NULL;
2208 Elf_Internal_Shdr * symtab_hdr;
2209 struct elf_link_hash_entry ** sym_hashes;
2210 bfd_vma * local_got_offsets;
2211 asection * sgot = NULL;
2212 asection * splt = NULL;
2213 asection * sreloc = NULL;
2215 bfd_signed_vma signed_addend;
2216 struct elf32_arm_link_hash_table * globals;
2218 globals = elf32_arm_hash_table (info);
2221 /* Some relocation type map to different relocations depending on the
2222 target. We pick the right one here. */
2223 r_type = arm_real_reloc_type (globals, r_type);
2224 if (r_type != howto->type)
2225 howto = elf32_arm_howto_from_type (r_type);
2226 #endif /* OLD_ARM_ABI */
2228 /* If the start address has been set, then set the EF_ARM_HASENTRY
2229 flag. Setting this more than once is redundant, but the cost is
2230 not too high, and it keeps the code simple.
2232 The test is done here, rather than somewhere else, because the
2233 start address is only set just before the final link commences.
2235 Note - if the user deliberately sets a start address of 0, the
2236 flag will not be set. */
2237 if (bfd_get_start_address (output_bfd) != 0)
2238 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2240 dynobj = elf_hash_table (info)->dynobj;
2243 sgot = bfd_get_section_by_name (dynobj, ".got");
2244 splt = bfd_get_section_by_name (dynobj, ".plt");
2246 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2247 sym_hashes = elf_sym_hashes (input_bfd);
2248 local_got_offsets = elf_local_got_offsets (input_bfd);
2249 r_symndx = ELF32_R_SYM (rel->r_info);
2252 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2254 if (addend & ((howto->src_mask + 1) >> 1))
2257 signed_addend &= ~ howto->src_mask;
2258 signed_addend |= addend;
2261 signed_addend = addend;
2263 addend = signed_addend = rel->r_addend;
2269 return bfd_reloc_ok;
2281 /* r_symndx will be zero only for relocs against symbols
2282 from removed linkonce sections, or sections discarded by
2285 return bfd_reloc_ok;
2287 /* Handle relocations which should use the PLT entry. ABS32/REL32
2288 will use the symbol's value, which may point to a PLT entry, but we
2289 don't need to handle that here. If we created a PLT entry, all
2290 branches in this object should go to it. */
2291 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2294 && h->plt.offset != (bfd_vma) -1)
2296 /* If we've created a .plt section, and assigned a PLT entry to
2297 this function, it should not be known to bind locally. If
2298 it were, we would have cleared the PLT entry. */
2299 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2301 value = (splt->output_section->vma
2302 + splt->output_offset
2304 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2305 contents, rel->r_offset, value,
2309 /* When generating a shared object, these relocations are copied
2310 into the output file to be resolved at run time. */
2312 && (input_section->flags & SEC_ALLOC)
2313 && (r_type != R_ARM_REL32
2314 || !SYMBOL_CALLS_LOCAL (info, h))
2316 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2317 || h->root.type != bfd_link_hash_undefweak)
2318 && r_type != R_ARM_PC24
2320 && r_type != R_ARM_CALL
2321 && r_type != R_ARM_JUMP24
2322 && r_type != R_ARM_PREL31
2324 && r_type != R_ARM_PLT32)
2326 Elf_Internal_Rela outrel;
2328 bfd_boolean skip, relocate;
2334 name = (bfd_elf_string_from_elf_section
2336 elf_elfheader (input_bfd)->e_shstrndx,
2337 elf_section_data (input_section)->rel_hdr.sh_name));
2339 return bfd_reloc_notsupported;
2341 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2342 && strcmp (bfd_get_section_name (input_bfd,
2346 sreloc = bfd_get_section_by_name (dynobj, name);
2347 BFD_ASSERT (sreloc != NULL);
2354 _bfd_elf_section_offset (output_bfd, info, input_section,
2356 if (outrel.r_offset == (bfd_vma) -1)
2358 else if (outrel.r_offset == (bfd_vma) -2)
2359 skip = TRUE, relocate = TRUE;
2360 outrel.r_offset += (input_section->output_section->vma
2361 + input_section->output_offset);
2364 memset (&outrel, 0, sizeof outrel);
2369 || !h->def_regular))
2370 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2375 /* This symbol is local, or marked to become local. */
2377 if (globals->symbian_p)
2379 /* On Symbian OS, the data segment and text segement
2380 can be relocated independently. Therefore, we
2381 must indicate the segment to which this
2382 relocation is relative. The BPABI allows us to
2383 use any symbol in the right segment; we just use
2384 the section symbol as it is convenient. (We
2385 cannot use the symbol given by "h" directly as it
2386 will not appear in the dynamic symbol table.) */
2387 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2388 BFD_ASSERT (symbol != 0);
2391 /* On SVR4-ish systems, the dynamic loader cannot
2392 relocate the text and data segments independently,
2393 so the symbol does not matter. */
2395 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2398 loc = sreloc->contents;
2399 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2400 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2402 /* If this reloc is against an external symbol, we do not want to
2403 fiddle with the addend. Otherwise, we need to include the symbol
2404 value so that it becomes an addend for the dynamic reloc. */
2406 return bfd_reloc_ok;
2408 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2409 contents, rel->r_offset, value,
2412 else switch (r_type)
2415 case R_ARM_XPC25: /* Arm BLX instruction. */
2419 case R_ARM_PC24: /* Arm B/BL instruction */
2422 if (r_type == R_ARM_XPC25)
2424 /* Check for Arm calling Arm function. */
2425 /* FIXME: Should we translate the instruction into a BL
2426 instruction instead ? */
2427 if (sym_flags != STT_ARM_TFUNC)
2428 (*_bfd_error_handler)
2429 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2431 h ? h->root.root.string : "(local)");
2436 /* Check for Arm calling Thumb function. */
2437 if (sym_flags == STT_ARM_TFUNC)
2439 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2440 output_bfd, input_section,
2441 hit_data, sym_sec, rel->r_offset,
2442 signed_addend, value);
2443 return bfd_reloc_ok;
2447 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
2448 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
2450 /* The old way of doing things. Trearing the addend as a
2451 byte sized field and adding in the pipeline offset. */
2452 value -= (input_section->output_section->vma
2453 + input_section->output_offset);
2454 value -= rel->r_offset;
2457 if (! globals->no_pipeline_knowledge)
2462 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2464 S is the address of the symbol in the relocation.
2465 P is address of the instruction being relocated.
2466 A is the addend (extracted from the instruction) in bytes.
2468 S is held in 'value'.
2469 P is the base address of the section containing the
2470 instruction plus the offset of the reloc into that
2472 (input_section->output_section->vma +
2473 input_section->output_offset +
2475 A is the addend, converted into bytes, ie:
2478 Note: None of these operations have knowledge of the pipeline
2479 size of the processor, thus it is up to the assembler to
2480 encode this information into the addend. */
2481 value -= (input_section->output_section->vma
2482 + input_section->output_offset);
2483 value -= rel->r_offset;
2484 value += (signed_addend << howto->size);
2486 /* Previous versions of this code also used to add in the
2487 pipeline offset here. This is wrong because the linker is
2488 not supposed to know about such things, and one day it might
2489 change. In order to support old binaries that need the old
2490 behaviour however, so we attempt to detect which ABI was
2491 used to create the reloc. */
2492 if (! globals->no_pipeline_knowledge)
2494 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
2496 i_ehdrp = elf_elfheader (input_bfd);
2498 if (i_ehdrp->e_ident[EI_OSABI] == 0)
2503 signed_addend = value;
2504 signed_addend >>= howto->rightshift;
2506 /* It is not an error for an undefined weak reference to be
2507 out of range. Any program that branches to such a symbol
2508 is going to crash anyway, so there is no point worrying
2509 about getting the destination exactly right. */
2510 if (! h || h->root.type != bfd_link_hash_undefweak)
2512 /* Perform a signed range check. */
2513 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2514 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2515 return bfd_reloc_overflow;
2519 /* If necessary set the H bit in the BLX instruction. */
2520 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2521 value = (signed_addend & howto->dst_mask)
2522 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2526 value = (signed_addend & howto->dst_mask)
2527 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2532 if (sym_flags == STT_ARM_TFUNC)
2537 value -= (input_section->output_section->vma
2538 + input_section->output_offset + rel->r_offset);
2544 value -= (input_section->output_section->vma
2545 + input_section->output_offset + rel->r_offset);
2546 value += signed_addend;
2547 if (! h || h->root.type != bfd_link_hash_undefweak)
2549 /* Check for overflow */
2550 if ((value ^ (value >> 1)) & (1 << 30))
2551 return bfd_reloc_overflow;
2553 value &= 0x7fffffff;
2554 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2555 if (sym_flags == STT_ARM_TFUNC)
2561 bfd_put_32 (input_bfd, value, hit_data);
2562 return bfd_reloc_ok;
2566 if ((long) value > 0x7f || (long) value < -0x80)
2567 return bfd_reloc_overflow;
2569 bfd_put_8 (input_bfd, value, hit_data);
2570 return bfd_reloc_ok;
2575 if ((long) value > 0x7fff || (long) value < -0x8000)
2576 return bfd_reloc_overflow;
2578 bfd_put_16 (input_bfd, value, hit_data);
2579 return bfd_reloc_ok;
2582 /* Support ldr and str instruction for the arm */
2583 /* Also thumb b (unconditional branch). ??? Really? */
2586 if ((long) value > 0x7ff || (long) value < -0x800)
2587 return bfd_reloc_overflow;
2589 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2590 bfd_put_32 (input_bfd, value, hit_data);
2591 return bfd_reloc_ok;
2593 case R_ARM_THM_ABS5:
2594 /* Support ldr and str instructions for the thumb. */
2596 /* Need to refetch addend. */
2597 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2598 /* ??? Need to determine shift amount from operand size. */
2599 addend >>= howto->rightshift;
2603 /* ??? Isn't value unsigned? */
2604 if ((long) value > 0x1f || (long) value < -0x10)
2605 return bfd_reloc_overflow;
2607 /* ??? Value needs to be properly shifted into place first. */
2608 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2609 bfd_put_16 (input_bfd, value, hit_data);
2610 return bfd_reloc_ok;
2613 case R_ARM_THM_XPC22:
2615 case R_ARM_THM_PC22:
2616 /* Thumb BL (branch long instruction). */
2619 bfd_boolean overflow = FALSE;
2620 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2621 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2622 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2623 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2625 bfd_signed_vma signed_check;
2628 /* Need to refetch the addend and squish the two 11 bit pieces
2631 bfd_vma upper = upper_insn & 0x7ff;
2632 bfd_vma lower = lower_insn & 0x7ff;
2633 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2634 addend = (upper << 12) | (lower << 1);
2635 signed_addend = addend;
2639 if (r_type == R_ARM_THM_XPC22)
2641 /* Check for Thumb to Thumb call. */
2642 /* FIXME: Should we translate the instruction into a BL
2643 instruction instead ? */
2644 if (sym_flags == STT_ARM_TFUNC)
2645 (*_bfd_error_handler)
2646 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2648 h ? h->root.root.string : "(local)");
2653 /* If it is not a call to Thumb, assume call to Arm.
2654 If it is a call relative to a section name, then it is not a
2655 function call at all, but rather a long jump. */
2656 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
2658 if (elf32_thumb_to_arm_stub
2659 (info, sym_name, input_bfd, output_bfd, input_section,
2660 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2661 return bfd_reloc_ok;
2663 return bfd_reloc_dangerous;
2667 relocation = value + signed_addend;
2669 relocation -= (input_section->output_section->vma
2670 + input_section->output_offset
2673 if (! globals->no_pipeline_knowledge)
2675 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
2677 i_ehdrp = elf_elfheader (input_bfd);
2679 /* Previous versions of this code also used to add in the pipline
2680 offset here. This is wrong because the linker is not supposed
2681 to know about such things, and one day it might change. In order
2682 to support old binaries that need the old behaviour however, so
2683 we attempt to detect which ABI was used to create the reloc. */
2684 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
2685 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
2686 || i_ehdrp->e_ident[EI_OSABI] == 0)
2690 check = relocation >> howto->rightshift;
2692 /* If this is a signed value, the rightshift just dropped
2693 leading 1 bits (assuming twos complement). */
2694 if ((bfd_signed_vma) relocation >= 0)
2695 signed_check = check;
2697 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2699 /* Assumes two's complement. */
2700 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2704 if (r_type == R_ARM_THM_XPC22
2705 && ((lower_insn & 0x1800) == 0x0800))
2706 /* For a BLX instruction, make sure that the relocation is rounded up
2707 to a word boundary. This follows the semantics of the instruction
2708 which specifies that bit 1 of the target address will come from bit
2709 1 of the base address. */
2710 relocation = (relocation + 2) & ~ 3;
2712 /* Put RELOCATION back into the insn. */
2713 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
2714 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
2716 /* Put the relocated value back in the object file: */
2717 bfd_put_16 (input_bfd, upper_insn, hit_data);
2718 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
2720 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
2724 case R_ARM_THM_PC11:
2725 /* Thumb B (branch) instruction). */
2727 bfd_signed_vma relocation;
2728 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
2729 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2730 bfd_signed_vma signed_check;
2733 /* Need to refetch addend. */
2734 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2735 if (addend & ((howto->src_mask + 1) >> 1))
2738 signed_addend &= ~ howto->src_mask;
2739 signed_addend |= addend;
2742 signed_addend = addend;
2743 /* The value in the insn has been right shifted. We need to
2744 undo this, so that we can perform the address calculation
2745 in terms of bytes. */
2746 signed_addend <<= howto->rightshift;
2748 relocation = value + signed_addend;
2750 relocation -= (input_section->output_section->vma
2751 + input_section->output_offset
2754 relocation >>= howto->rightshift;
2755 signed_check = relocation;
2756 relocation &= howto->dst_mask;
2757 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
2759 bfd_put_16 (input_bfd, relocation, hit_data);
2761 /* Assumes two's complement. */
2762 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2763 return bfd_reloc_overflow;
2765 return bfd_reloc_ok;
2769 case R_ARM_ALU_PCREL7_0:
2770 case R_ARM_ALU_PCREL15_8:
2771 case R_ARM_ALU_PCREL23_15:
2776 insn = bfd_get_32 (input_bfd, hit_data);
2778 /* Extract the addend. */
2779 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
2780 signed_addend = addend;
2782 relocation = value + signed_addend;
2784 relocation -= (input_section->output_section->vma
2785 + input_section->output_offset
2787 insn = (insn & ~0xfff)
2788 | ((howto->bitpos << 7) & 0xf00)
2789 | ((relocation >> howto->bitpos) & 0xff);
2790 bfd_put_32 (input_bfd, value, hit_data);
2792 return bfd_reloc_ok;
2795 case R_ARM_GNU_VTINHERIT:
2796 case R_ARM_GNU_VTENTRY:
2797 return bfd_reloc_ok;
2800 return bfd_reloc_notsupported;
2802 case R_ARM_GLOB_DAT:
2803 return bfd_reloc_notsupported;
2805 case R_ARM_JUMP_SLOT:
2806 return bfd_reloc_notsupported;
2808 case R_ARM_RELATIVE:
2809 return bfd_reloc_notsupported;
2812 /* Relocation is relative to the start of the
2813 global offset table. */
2815 BFD_ASSERT (sgot != NULL);
2817 return bfd_reloc_notsupported;
2819 /* If we are addressing a Thumb function, we need to adjust the
2820 address by one, so that attempts to call the function pointer will
2821 correctly interpret it as Thumb code. */
2822 if (sym_flags == STT_ARM_TFUNC)
2825 /* Note that sgot->output_offset is not involved in this
2826 calculation. We always want the start of .got. If we
2827 define _GLOBAL_OFFSET_TABLE in a different way, as is
2828 permitted by the ABI, we might have to change this
2830 value -= sgot->output_section->vma;
2831 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2832 contents, rel->r_offset, value,
2836 /* Use global offset table as symbol value. */
2837 BFD_ASSERT (sgot != NULL);
2840 return bfd_reloc_notsupported;
2842 value = sgot->output_section->vma;
2843 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2844 contents, rel->r_offset, value,
2849 case R_ARM_GOT_PREL:
2851 /* Relocation is to the entry for this symbol in the
2852 global offset table. */
2854 return bfd_reloc_notsupported;
2861 off = h->got.offset;
2862 BFD_ASSERT (off != (bfd_vma) -1);
2863 dyn = globals->root.dynamic_sections_created;
2865 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2867 && SYMBOL_REFERENCES_LOCAL (info, h))
2868 || (ELF_ST_VISIBILITY (h->other)
2869 && h->root.type == bfd_link_hash_undefweak))
2871 /* This is actually a static link, or it is a -Bsymbolic link
2872 and the symbol is defined locally. We must initialize this
2873 entry in the global offset table. Since the offset must
2874 always be a multiple of 4, we use the least significant bit
2875 to record whether we have initialized it already.
2877 When doing a dynamic link, we create a .rel.got relocation
2878 entry to initialize the value. This is done in the
2879 finish_dynamic_symbol routine. */
2884 /* If we are addressing a Thumb function, we need to
2885 adjust the address by one, so that attempts to
2886 call the function pointer will correctly
2887 interpret it as Thumb code. */
2888 if (sym_flags == STT_ARM_TFUNC)
2891 bfd_put_32 (output_bfd, value, sgot->contents + off);
2896 value = sgot->output_offset + off;
2902 BFD_ASSERT (local_got_offsets != NULL &&
2903 local_got_offsets[r_symndx] != (bfd_vma) -1);
2905 off = local_got_offsets[r_symndx];
2907 /* The offset must always be a multiple of 4. We use the
2908 least significant bit to record whether we have already
2909 generated the necessary reloc. */
2914 bfd_put_32 (output_bfd, value, sgot->contents + off);
2919 Elf_Internal_Rela outrel;
2922 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2923 BFD_ASSERT (srelgot != NULL);
2925 outrel.r_offset = (sgot->output_section->vma
2926 + sgot->output_offset
2928 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2929 loc = srelgot->contents;
2930 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2931 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2934 local_got_offsets[r_symndx] |= 1;
2937 value = sgot->output_offset + off;
2939 if (r_type != R_ARM_GOT32)
2940 value += sgot->output_section->vma;
2942 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2943 contents, rel->r_offset, value,
2947 return bfd_reloc_notsupported;
2949 case R_ARM_AMP_VCALL9:
2950 return bfd_reloc_notsupported;
2952 case R_ARM_RSBREL32:
2953 return bfd_reloc_notsupported;
2955 case R_ARM_THM_RPC22:
2956 return bfd_reloc_notsupported;
2959 return bfd_reloc_notsupported;
2962 return bfd_reloc_notsupported;
2965 return bfd_reloc_notsupported;
2968 return bfd_reloc_notsupported;
2971 return bfd_reloc_notsupported;
2976 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
2978 arm_add_to_rel (bfd * abfd,
2980 reloc_howto_type * howto,
2981 bfd_signed_vma increment)
2983 bfd_signed_vma addend;
2985 if (howto->type == R_ARM_THM_PC22)
2987 int upper_insn, lower_insn;
2990 upper_insn = bfd_get_16 (abfd, address);
2991 lower_insn = bfd_get_16 (abfd, address + 2);
2992 upper = upper_insn & 0x7ff;
2993 lower = lower_insn & 0x7ff;
2995 addend = (upper << 12) | (lower << 1);
2996 addend += increment;
2999 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3000 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3002 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3003 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3009 contents = bfd_get_32 (abfd, address);
3011 /* Get the (signed) value from the instruction. */
3012 addend = contents & howto->src_mask;
3013 if (addend & ((howto->src_mask + 1) >> 1))
3015 bfd_signed_vma mask;
3018 mask &= ~ howto->src_mask;
3022 /* Add in the increment, (which is a byte value). */
3023 switch (howto->type)
3026 addend += increment;
3034 addend <<= howto->size;
3035 addend += increment;
3037 /* Should we check for overflow here ? */
3039 /* Drop any undesired bits. */
3040 addend >>= howto->rightshift;
3044 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3046 bfd_put_32 (abfd, contents, address);
3049 #endif /* USE_REL */
3051 /* Relocate an ARM ELF section. */
3053 elf32_arm_relocate_section (bfd * output_bfd,
3054 struct bfd_link_info * info,
3056 asection * input_section,
3057 bfd_byte * contents,
3058 Elf_Internal_Rela * relocs,
3059 Elf_Internal_Sym * local_syms,
3060 asection ** local_sections)
3062 Elf_Internal_Shdr *symtab_hdr;
3063 struct elf_link_hash_entry **sym_hashes;
3064 Elf_Internal_Rela *rel;
3065 Elf_Internal_Rela *relend;
3067 struct elf32_arm_link_hash_table * globals;
3070 if (info->relocatable)
3074 globals = elf32_arm_hash_table (info);
3075 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3076 sym_hashes = elf_sym_hashes (input_bfd);
3079 relend = relocs + input_section->reloc_count;
3080 for (; rel < relend; rel++)
3083 reloc_howto_type * howto;
3084 unsigned long r_symndx;
3085 Elf_Internal_Sym * sym;
3087 struct elf_link_hash_entry * h;
3089 bfd_reloc_status_type r;
3092 r_symndx = ELF32_R_SYM (rel->r_info);
3093 r_type = ELF32_R_TYPE (rel->r_info);
3094 r_type = arm_real_reloc_type (globals, r_type);
3096 if ( r_type == R_ARM_GNU_VTENTRY
3097 || r_type == R_ARM_GNU_VTINHERIT)
3100 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3101 howto = bfd_reloc.howto;
3104 if (info->relocatable)
3106 /* This is a relocatable link. We don't have to change
3107 anything, unless the reloc is against a section symbol,
3108 in which case we have to adjust according to where the
3109 section symbol winds up in the output section. */
3110 if (r_symndx < symtab_hdr->sh_info)
3112 sym = local_syms + r_symndx;
3113 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3115 sec = local_sections[r_symndx];
3116 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3118 (bfd_signed_vma) (sec->output_offset
3127 /* This is a final link. */
3132 if (r_symndx < symtab_hdr->sh_info)
3134 sym = local_syms + r_symndx;
3135 sec = local_sections[r_symndx];
3137 relocation = (sec->output_section->vma
3138 + sec->output_offset
3140 if ((sec->flags & SEC_MERGE)
3141 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3144 bfd_vma addend, value;
3146 if (howto->rightshift)
3148 (*_bfd_error_handler)
3149 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3150 input_bfd, input_section,
3151 (long) rel->r_offset, howto->name);
3155 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3157 /* Get the (signed) value from the instruction. */
3158 addend = value & howto->src_mask;
3159 if (addend & ((howto->src_mask + 1) >> 1))
3161 bfd_signed_vma mask;
3164 mask &= ~ howto->src_mask;
3169 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3171 addend += msec->output_section->vma + msec->output_offset;
3172 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3173 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3176 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3182 bfd_boolean unresolved_reloc;
3184 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3185 r_symndx, symtab_hdr, sym_hashes,
3187 unresolved_reloc, warned);
3189 if (unresolved_reloc || relocation != 0)
3191 /* In these cases, we don't need the relocation value.
3192 We check specially because in some obscure cases
3193 sec->output_section will be NULL. */
3203 case R_ARM_THM_PC22:
3207 && ((!info->symbolic && h->dynindx != -1)
3209 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3210 && ((input_section->flags & SEC_ALLOC) != 0
3211 /* DWARF will emit R_ARM_ABS32 relocations in its
3212 sections against symbols defined externally
3213 in shared libraries. We can't do anything
3215 || ((input_section->flags & SEC_DEBUGGING) != 0
3227 case R_ARM_GOT_PREL:
3229 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
3230 (elf_hash_table (info)->dynamic_sections_created,
3233 || (!info->symbolic && h->dynindx != -1)
3234 || !h->def_regular))
3239 if (unresolved_reloc)
3241 (_("%B(%A): warning: unresolvable relocation %d against symbol `%s'"),
3242 input_bfd, input_section,
3244 h->root.root.string);
3251 name = h->root.root.string;
3254 name = (bfd_elf_string_from_elf_section
3255 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3256 if (name == NULL || *name == '\0')
3257 name = bfd_section_name (input_bfd, sec);
3260 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3261 input_section, contents, rel,
3262 relocation, info, sec, name,
3263 (h ? ELF_ST_TYPE (h->type) :
3264 ELF_ST_TYPE (sym->st_info)), h);
3266 if (r != bfd_reloc_ok)
3268 const char * msg = (const char *) 0;
3272 case bfd_reloc_overflow:
3273 /* If the overflowing reloc was to an undefined symbol,
3274 we have already printed one error message and there
3275 is no point complaining again. */
3277 h->root.type != bfd_link_hash_undefined)
3278 && (!((*info->callbacks->reloc_overflow)
3279 (info, (h ? &h->root : NULL), name, howto->name,
3280 (bfd_vma) 0, input_bfd, input_section,
3285 case bfd_reloc_undefined:
3286 if (!((*info->callbacks->undefined_symbol)
3287 (info, name, input_bfd, input_section,
3288 rel->r_offset, TRUE)))
3292 case bfd_reloc_outofrange:
3293 msg = _("internal error: out of range error");
3296 case bfd_reloc_notsupported:
3297 msg = _("internal error: unsupported relocation error");
3300 case bfd_reloc_dangerous:
3301 msg = _("internal error: dangerous error");
3305 msg = _("internal error: unknown error");
3309 if (!((*info->callbacks->warning)
3310 (info, msg, name, input_bfd, input_section,
3321 /* Set the right machine number. */
3324 elf32_arm_object_p (bfd *abfd)
3328 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3330 if (mach != bfd_mach_arm_unknown)
3331 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3333 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3334 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3337 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3342 /* Function to keep ARM specific flags in the ELF header. */
3345 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3347 if (elf_flags_init (abfd)
3348 && elf_elfheader (abfd)->e_flags != flags)
3350 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3352 if (flags & EF_ARM_INTERWORK)
3353 (*_bfd_error_handler)
3354 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3358 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3364 elf_elfheader (abfd)->e_flags = flags;
3365 elf_flags_init (abfd) = TRUE;
3371 /* Copy backend specific data from one object module to another. */
3374 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3379 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3380 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3383 in_flags = elf_elfheader (ibfd)->e_flags;
3384 out_flags = elf_elfheader (obfd)->e_flags;
3386 if (elf_flags_init (obfd)
3387 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3388 && in_flags != out_flags)
3390 /* Cannot mix APCS26 and APCS32 code. */
3391 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3394 /* Cannot mix float APCS and non-float APCS code. */
3395 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3398 /* If the src and dest have different interworking flags
3399 then turn off the interworking bit. */
3400 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3402 if (out_flags & EF_ARM_INTERWORK)
3404 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3407 in_flags &= ~EF_ARM_INTERWORK;
3410 /* Likewise for PIC, though don't warn for this case. */
3411 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3412 in_flags &= ~EF_ARM_PIC;
3415 elf_elfheader (obfd)->e_flags = in_flags;
3416 elf_flags_init (obfd) = TRUE;
3421 /* Merge backend specific data from an object file to the output
3422 object file when linking. */
3425 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3429 bfd_boolean flags_compatible = TRUE;
3432 /* Check if we have the same endianess. */
3433 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3436 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3437 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3440 /* The input BFD must have had its flags initialised. */
3441 /* The following seems bogus to me -- The flags are initialized in
3442 the assembler but I don't think an elf_flags_init field is
3443 written into the object. */
3444 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3446 in_flags = elf_elfheader (ibfd)->e_flags;
3447 out_flags = elf_elfheader (obfd)->e_flags;
3449 if (!elf_flags_init (obfd))
3451 /* If the input is the default architecture and had the default
3452 flags then do not bother setting the flags for the output
3453 architecture, instead allow future merges to do this. If no
3454 future merges ever set these flags then they will retain their
3455 uninitialised values, which surprise surprise, correspond
3456 to the default values. */
3457 if (bfd_get_arch_info (ibfd)->the_default
3458 && elf_elfheader (ibfd)->e_flags == 0)
3461 elf_flags_init (obfd) = TRUE;
3462 elf_elfheader (obfd)->e_flags = in_flags;
3464 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3465 && bfd_get_arch_info (obfd)->the_default)
3466 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3471 /* Determine what should happen if the input ARM architecture
3472 does not match the output ARM architecture. */
3473 if (! bfd_arm_merge_machines (ibfd, obfd))
3476 /* Identical flags must be compatible. */
3477 if (in_flags == out_flags)
3480 /* Check to see if the input BFD actually contains any sections. If
3481 not, its flags may not have been initialised either, but it
3482 cannot actually cause any incompatibility. Do not short-circuit
3483 dynamic objects; their section list may be emptied by
3484 elf_link_add_object_symbols.
3486 Also check to see if there are no code sections in the input.
3487 In this case there is no need to check for code specific flags.
3488 XXX - do we need to worry about floating-point format compatability
3489 in data sections ? */
3490 if (!(ibfd->flags & DYNAMIC))
3492 bfd_boolean null_input_bfd = TRUE;
3493 bfd_boolean only_data_sections = TRUE;
3495 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3497 /* Ignore synthetic glue sections. */
3498 if (strcmp (sec->name, ".glue_7")
3499 && strcmp (sec->name, ".glue_7t"))
3501 if ((bfd_get_section_flags (ibfd, sec)
3502 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3503 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3504 only_data_sections = FALSE;
3506 null_input_bfd = FALSE;
3511 if (null_input_bfd || only_data_sections)
3515 /* Complain about various flag mismatches. */
3516 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
3519 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
3521 (in_flags & EF_ARM_EABIMASK) >> 24,
3522 (out_flags & EF_ARM_EABIMASK) >> 24);
3526 /* Not sure what needs to be checked for EABI versions >= 1. */
3527 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
3529 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3532 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3534 in_flags & EF_ARM_APCS_26 ? 26 : 32,
3535 out_flags & EF_ARM_APCS_26 ? 26 : 32);
3536 flags_compatible = FALSE;
3539 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3541 if (in_flags & EF_ARM_APCS_FLOAT)
3543 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3547 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3550 flags_compatible = FALSE;
3553 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
3555 if (in_flags & EF_ARM_VFP_FLOAT)
3557 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3561 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3564 flags_compatible = FALSE;
3567 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
3569 if (in_flags & EF_ARM_MAVERICK_FLOAT)
3571 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3575 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3578 flags_compatible = FALSE;
3581 #ifdef EF_ARM_SOFT_FLOAT
3582 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
3584 /* We can allow interworking between code that is VFP format
3585 layout, and uses either soft float or integer regs for
3586 passing floating point arguments and results. We already
3587 know that the APCS_FLOAT flags match; similarly for VFP
3589 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
3590 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
3592 if (in_flags & EF_ARM_SOFT_FLOAT)
3594 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3598 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3601 flags_compatible = FALSE;
3606 /* Interworking mismatch is only a warning. */
3607 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3609 if (in_flags & EF_ARM_INTERWORK)
3612 (_("Warning: %B supports interworking, whereas %B does not"),
3618 (_("Warning: %B does not support interworking, whereas %B does"),
3624 return flags_compatible;
3627 /* Display the flags field. */
3630 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
3632 FILE * file = (FILE *) ptr;
3633 unsigned long flags;
3635 BFD_ASSERT (abfd != NULL && ptr != NULL);
3637 /* Print normal ELF private data. */
3638 _bfd_elf_print_private_bfd_data (abfd, ptr);
3640 flags = elf_elfheader (abfd)->e_flags;
3641 /* Ignore init flag - it may not be set, despite the flags field
3642 containing valid data. */
3644 /* xgettext:c-format */
3645 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3647 switch (EF_ARM_EABI_VERSION (flags))
3649 case EF_ARM_EABI_UNKNOWN:
3650 /* The following flag bits are GNU extensions and not part of the
3651 official ARM ELF extended ABI. Hence they are only decoded if
3652 the EABI version is not set. */
3653 if (flags & EF_ARM_INTERWORK)
3654 fprintf (file, _(" [interworking enabled]"));
3656 if (flags & EF_ARM_APCS_26)
3657 fprintf (file, " [APCS-26]");
3659 fprintf (file, " [APCS-32]");
3661 if (flags & EF_ARM_VFP_FLOAT)
3662 fprintf (file, _(" [VFP float format]"));
3663 else if (flags & EF_ARM_MAVERICK_FLOAT)
3664 fprintf (file, _(" [Maverick float format]"));
3666 fprintf (file, _(" [FPA float format]"));
3668 if (flags & EF_ARM_APCS_FLOAT)
3669 fprintf (file, _(" [floats passed in float registers]"));
3671 if (flags & EF_ARM_PIC)
3672 fprintf (file, _(" [position independent]"));
3674 if (flags & EF_ARM_NEW_ABI)
3675 fprintf (file, _(" [new ABI]"));
3677 if (flags & EF_ARM_OLD_ABI)
3678 fprintf (file, _(" [old ABI]"));
3680 if (flags & EF_ARM_SOFT_FLOAT)
3681 fprintf (file, _(" [software FP]"));
3683 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
3684 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
3685 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
3686 | EF_ARM_MAVERICK_FLOAT);
3689 case EF_ARM_EABI_VER1:
3690 fprintf (file, _(" [Version1 EABI]"));
3692 if (flags & EF_ARM_SYMSARESORTED)
3693 fprintf (file, _(" [sorted symbol table]"));
3695 fprintf (file, _(" [unsorted symbol table]"));
3697 flags &= ~ EF_ARM_SYMSARESORTED;
3700 case EF_ARM_EABI_VER2:
3701 fprintf (file, _(" [Version2 EABI]"));
3703 if (flags & EF_ARM_SYMSARESORTED)
3704 fprintf (file, _(" [sorted symbol table]"));
3706 fprintf (file, _(" [unsorted symbol table]"));
3708 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
3709 fprintf (file, _(" [dynamic symbols use segment index]"));
3711 if (flags & EF_ARM_MAPSYMSFIRST)
3712 fprintf (file, _(" [mapping symbols precede others]"));
3714 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
3715 | EF_ARM_MAPSYMSFIRST);
3718 case EF_ARM_EABI_VER3:
3719 fprintf (file, _(" [Version3 EABI]"));
3722 case EF_ARM_EABI_VER4:
3723 fprintf (file, _(" [Version4 EABI]"));
3725 if (flags & EF_ARM_BE8)
3726 fprintf (file, _(" [BE8]"));
3728 if (flags & EF_ARM_LE8)
3729 fprintf (file, _(" [LE8]"));
3731 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
3735 fprintf (file, _(" <EABI version unrecognised>"));
3739 flags &= ~ EF_ARM_EABIMASK;
3741 if (flags & EF_ARM_RELEXEC)
3742 fprintf (file, _(" [relocatable executable]"));
3744 if (flags & EF_ARM_HASENTRY)
3745 fprintf (file, _(" [has entry point]"));
3747 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
3750 fprintf (file, _("<Unrecognised flag bits set>"));
3758 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
3760 switch (ELF_ST_TYPE (elf_sym->st_info))
3763 return ELF_ST_TYPE (elf_sym->st_info);
3766 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3767 This allows us to distinguish between data used by Thumb instructions
3768 and non-data (which is probably code) inside Thumb regions of an
3770 if (type != STT_OBJECT)
3771 return ELF_ST_TYPE (elf_sym->st_info);
3782 elf32_arm_gc_mark_hook (asection * sec,
3783 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3784 Elf_Internal_Rela * rel,
3785 struct elf_link_hash_entry * h,
3786 Elf_Internal_Sym * sym)
3790 switch (ELF32_R_TYPE (rel->r_info))
3792 case R_ARM_GNU_VTINHERIT:
3793 case R_ARM_GNU_VTENTRY:
3797 switch (h->root.type)
3799 case bfd_link_hash_defined:
3800 case bfd_link_hash_defweak:
3801 return h->root.u.def.section;
3803 case bfd_link_hash_common:
3804 return h->root.u.c.p->section;
3812 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3817 /* Update the got entry reference counts for the section being removed. */
3820 elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
3821 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3822 asection * sec ATTRIBUTE_UNUSED,
3823 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
3825 Elf_Internal_Shdr *symtab_hdr;
3826 struct elf_link_hash_entry **sym_hashes;
3827 bfd_signed_vma *local_got_refcounts;
3828 const Elf_Internal_Rela *rel, *relend;
3829 unsigned long r_symndx;
3830 struct elf_link_hash_entry *h;
3831 struct elf32_arm_link_hash_table * globals;
3833 globals = elf32_arm_hash_table (info);
3835 elf_section_data (sec)->local_dynrel = NULL;
3837 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3838 sym_hashes = elf_sym_hashes (abfd);
3839 local_got_refcounts = elf_local_got_refcounts (abfd);
3841 relend = relocs + sec->reloc_count;
3842 for (rel = relocs; rel < relend; rel++)
3846 r_type = ELF32_R_TYPE (rel->r_info);
3848 r_type = arm_real_reloc_type (globals, r_type);
3854 case R_ARM_GOT_PREL:
3856 r_symndx = ELF32_R_SYM (rel->r_info);
3857 if (r_symndx >= symtab_hdr->sh_info)
3859 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3860 if (h->got.refcount > 0)
3861 h->got.refcount -= 1;
3863 else if (local_got_refcounts != NULL)
3865 if (local_got_refcounts[r_symndx] > 0)
3866 local_got_refcounts[r_symndx] -= 1;
3879 r_symndx = ELF32_R_SYM (rel->r_info);
3880 if (r_symndx >= symtab_hdr->sh_info)
3882 struct elf32_arm_link_hash_entry *eh;
3883 struct elf32_arm_relocs_copied **pp;
3884 struct elf32_arm_relocs_copied *p;
3886 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3888 if (h->plt.refcount > 0)
3889 h->plt.refcount -= 1;
3891 if (r_type == R_ARM_ABS32
3892 || r_type == R_ARM_REL32)
3894 eh = (struct elf32_arm_link_hash_entry *) h;
3896 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
3898 if (p->section == sec)
3917 /* Look through the relocs for a section during the first phase. */
3920 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
3921 asection *sec, const Elf_Internal_Rela *relocs)
3923 Elf_Internal_Shdr *symtab_hdr;
3924 struct elf_link_hash_entry **sym_hashes;
3925 struct elf_link_hash_entry **sym_hashes_end;
3926 const Elf_Internal_Rela *rel;
3927 const Elf_Internal_Rela *rel_end;
3930 bfd_vma *local_got_offsets;
3931 struct elf32_arm_link_hash_table *htab;
3933 if (info->relocatable)
3936 htab = elf32_arm_hash_table (info);
3939 dynobj = elf_hash_table (info)->dynobj;
3940 local_got_offsets = elf_local_got_offsets (abfd);
3942 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3943 sym_hashes = elf_sym_hashes (abfd);
3944 sym_hashes_end = sym_hashes
3945 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
3947 if (!elf_bad_symtab (abfd))
3948 sym_hashes_end -= symtab_hdr->sh_info;
3950 rel_end = relocs + sec->reloc_count;
3951 for (rel = relocs; rel < rel_end; rel++)
3953 struct elf_link_hash_entry *h;
3954 unsigned long r_symndx;
3957 r_symndx = ELF32_R_SYM (rel->r_info);
3958 r_type = ELF32_R_TYPE (rel->r_info);
3960 r_type = arm_real_reloc_type (htab, r_type);
3962 if (r_symndx < symtab_hdr->sh_info)
3965 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3971 case R_ARM_GOT_PREL:
3973 /* This symbol requires a global offset table entry. */
3980 bfd_signed_vma *local_got_refcounts;
3982 /* This is a global offset table entry for a local symbol. */
3983 local_got_refcounts = elf_local_got_refcounts (abfd);
3984 if (local_got_refcounts == NULL)
3988 size = symtab_hdr->sh_info;
3989 size *= (sizeof (bfd_signed_vma) + sizeof (char));
3990 local_got_refcounts = bfd_zalloc (abfd, size);
3991 if (local_got_refcounts == NULL)
3993 elf_local_got_refcounts (abfd) = local_got_refcounts;
3995 local_got_refcounts[r_symndx] += 1;
3997 if (r_type == R_ARM_GOT32)
4003 if (htab->sgot == NULL)
4005 if (htab->root.dynobj == NULL)
4006 htab->root.dynobj = abfd;
4007 if (!create_got_section (htab->root.dynobj, info))
4023 /* If this reloc is in a read-only section, we might
4024 need a copy reloc. We can't check reliably at this
4025 stage whether the section is read-only, as input
4026 sections have not yet been mapped to output sections.
4027 Tentatively set the flag for now, and correct in
4028 adjust_dynamic_symbol. */
4032 /* We may need a .plt entry if the function this reloc
4033 refers to is in a different object. We can't tell for
4034 sure yet, because something later might force the
4036 if (r_type == R_ARM_PC24
4038 || r_type == R_ARM_CALL
4039 || r_type == R_ARM_JUMP24
4040 || r_type == R_ARM_PREL31
4042 || r_type == R_ARM_PLT32)
4045 /* If we create a PLT entry, this relocation will reference
4046 it, even if it's an ABS32 relocation. */
4047 h->plt.refcount += 1;
4050 /* If we are creating a shared library, and this is a reloc
4051 against a global symbol, or a non PC relative reloc
4052 against a local symbol, then we need to copy the reloc
4053 into the shared library. However, if we are linking with
4054 -Bsymbolic, we do not need to copy a reloc against a
4055 global symbol which is defined in an object we are
4056 including in the link (i.e., DEF_REGULAR is set). At
4057 this point we have not seen all the input files, so it is
4058 possible that DEF_REGULAR is not set now but will be set
4059 later (it is never cleared). We account for that
4060 possibility below by storing information in the
4061 relocs_copied field of the hash table entry. */
4063 && (sec->flags & SEC_ALLOC) != 0
4064 && ((r_type != R_ARM_PC24
4065 && r_type != R_ARM_PLT32
4067 && r_type != R_ARM_CALL
4068 && r_type != R_ARM_JUMP24
4069 && r_type != R_ARM_PREL31
4071 && r_type != R_ARM_REL32)
4073 && (! info->symbolic
4074 || !h->def_regular))))
4076 struct elf32_arm_relocs_copied *p, **head;
4078 /* When creating a shared object, we must copy these
4079 reloc types into the output file. We create a reloc
4080 section in dynobj and make room for this reloc. */
4085 name = (bfd_elf_string_from_elf_section
4087 elf_elfheader (abfd)->e_shstrndx,
4088 elf_section_data (sec)->rel_hdr.sh_name));
4092 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
4093 && strcmp (bfd_get_section_name (abfd, sec),
4096 sreloc = bfd_get_section_by_name (dynobj, name);
4101 sreloc = bfd_make_section (dynobj, name);
4102 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4103 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4104 if ((sec->flags & SEC_ALLOC) != 0
4105 /* BPABI objects never have dynamic
4106 relocations mapped. */
4107 && !htab->symbian_p)
4108 flags |= SEC_ALLOC | SEC_LOAD;
4110 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4111 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
4115 elf_section_data (sec)->sreloc = sreloc;
4118 /* If this is a global symbol, we count the number of
4119 relocations we need for this symbol. */
4122 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4126 /* Track dynamic relocs needed for local syms too.
4127 We really need local syms available to do this
4131 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4136 head = ((struct elf32_arm_relocs_copied **)
4137 &elf_section_data (s)->local_dynrel);
4141 if (p == NULL || p->section != sec)
4143 bfd_size_type amt = sizeof *p;
4145 p = bfd_alloc (htab->root.dynobj, amt);
4154 if (r_type == R_ARM_ABS32
4155 || r_type == R_ARM_REL32)
4160 /* This relocation describes the C++ object vtable hierarchy.
4161 Reconstruct it for later use during GC. */
4162 case R_ARM_GNU_VTINHERIT:
4163 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4167 /* This relocation describes which C++ vtable entries are actually
4168 used. Record for later use during GC. */
4169 case R_ARM_GNU_VTENTRY:
4170 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
4180 is_arm_mapping_symbol_name (const char * name)
4182 return (name != NULL)
4184 && ((name[1] == 'a') || (name[1] == 't') || (name[1] == 'd'))
4188 /* Treat mapping symbols as special target symbols. */
4191 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4193 return is_arm_mapping_symbol_name (sym->name);
4196 /* This is a copy of elf_find_function() from elf.c except that
4197 ARM mapping symbols are ignored when looking for function names
4198 and STT_ARM_TFUNC is considered to a function type. */
4201 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4205 const char ** filename_ptr,
4206 const char ** functionname_ptr)
4208 const char * filename = NULL;
4209 asymbol * func = NULL;
4210 bfd_vma low_func = 0;
4213 for (p = symbols; *p != NULL; p++)
4217 q = (elf_symbol_type *) *p;
4219 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4224 filename = bfd_asymbol_name (&q->symbol);
4228 /* Skip $a and $t symbols. */
4229 if ((q->symbol.flags & BSF_LOCAL)
4230 && is_arm_mapping_symbol_name (q->symbol.name))
4234 if (bfd_get_section (&q->symbol) == section
4235 && q->symbol.value >= low_func
4236 && q->symbol.value <= offset)
4238 func = (asymbol *) q;
4239 low_func = q->symbol.value;
4249 *filename_ptr = filename;
4250 if (functionname_ptr)
4251 *functionname_ptr = bfd_asymbol_name (func);
4257 /* Find the nearest line to a particular section and offset, for error
4258 reporting. This code is a duplicate of the code in elf.c, except
4259 that it uses arm_elf_find_function. */
4262 elf32_arm_find_nearest_line (bfd * abfd,
4266 const char ** filename_ptr,
4267 const char ** functionname_ptr,
4268 unsigned int * line_ptr)
4270 bfd_boolean found = FALSE;
4272 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4274 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4275 filename_ptr, functionname_ptr,
4277 & elf_tdata (abfd)->dwarf2_find_line_info))
4279 if (!*functionname_ptr)
4280 arm_elf_find_function (abfd, section, symbols, offset,
4281 *filename_ptr ? NULL : filename_ptr,
4287 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4288 & found, filename_ptr,
4289 functionname_ptr, line_ptr,
4290 & elf_tdata (abfd)->line_info))
4293 if (found && (*functionname_ptr || *line_ptr))
4296 if (symbols == NULL)
4299 if (! arm_elf_find_function (abfd, section, symbols, offset,
4300 filename_ptr, functionname_ptr))
4307 /* Adjust a symbol defined by a dynamic object and referenced by a
4308 regular object. The current definition is in some section of the
4309 dynamic object, but we're not including those sections. We have to
4310 change the definition to something the rest of the link can
4314 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4315 struct elf_link_hash_entry * h)
4319 unsigned int power_of_two;
4321 dynobj = elf_hash_table (info)->dynobj;
4323 /* Make sure we know what is going on here. */
4324 BFD_ASSERT (dynobj != NULL
4326 || h->u.weakdef != NULL
4329 && !h->def_regular)));
4331 /* If this is a function, put it in the procedure linkage table. We
4332 will fill in the contents of the procedure linkage table later,
4333 when we know the address of the .got section. */
4334 if (h->type == STT_FUNC
4337 if (h->plt.refcount <= 0
4338 || SYMBOL_CALLS_LOCAL (info, h)
4339 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4340 && h->root.type == bfd_link_hash_undefweak))
4342 /* This case can occur if we saw a PLT32 reloc in an input
4343 file, but the symbol was never referred to by a dynamic
4344 object, or if all references were garbage collected. In
4345 such a case, we don't actually need to build a procedure
4346 linkage table, and we can just do a PC24 reloc instead. */
4347 h->plt.offset = (bfd_vma) -1;
4354 /* It's possible that we incorrectly decided a .plt reloc was
4355 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4356 in check_relocs. We can't decide accurately between function
4357 and non-function syms in check-relocs; Objects loaded later in
4358 the link may change h->type. So fix it now. */
4359 h->plt.offset = (bfd_vma) -1;
4361 /* If this is a weak symbol, and there is a real definition, the
4362 processor independent code will have arranged for us to see the
4363 real definition first, and we can just use the same value. */
4364 if (h->u.weakdef != NULL)
4366 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4367 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4368 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4369 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4373 /* This is a reference to a symbol defined by a dynamic object which
4374 is not a function. */
4376 /* If we are creating a shared library, we must presume that the
4377 only references to the symbol are via the global offset table.
4378 For such cases we need not do anything here; the relocations will
4379 be handled correctly by relocate_section. */
4383 /* We must allocate the symbol in our .dynbss section, which will
4384 become part of the .bss section of the executable. There will be
4385 an entry for this symbol in the .dynsym section. The dynamic
4386 object will contain position independent code, so all references
4387 from the dynamic object to this symbol will go through the global
4388 offset table. The dynamic linker will use the .dynsym entry to
4389 determine the address it must put in the global offset table, so
4390 both the dynamic object and the regular object will refer to the
4391 same memory location for the variable. */
4392 s = bfd_get_section_by_name (dynobj, ".dynbss");
4393 BFD_ASSERT (s != NULL);
4395 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4396 copy the initial value out of the dynamic object and into the
4397 runtime process image. We need to remember the offset into the
4398 .rel.bss section we are going to use. */
4399 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4403 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
4404 BFD_ASSERT (srel != NULL);
4405 srel->size += sizeof (Elf32_External_Rel);
4409 /* We need to figure out the alignment required for this symbol. I
4410 have no idea how ELF linkers handle this. */
4411 power_of_two = bfd_log2 (h->size);
4412 if (power_of_two > 3)
4415 /* Apply the required alignment. */
4416 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4417 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4419 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4423 /* Define the symbol as being at this point in the section. */
4424 h->root.u.def.section = s;
4425 h->root.u.def.value = s->size;
4427 /* Increment the section size to make room for the symbol. */
4433 /* Allocate space in .plt, .got and associated reloc sections for
4437 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
4439 struct bfd_link_info *info;
4440 struct elf32_arm_link_hash_table *htab;
4441 struct elf32_arm_link_hash_entry *eh;
4442 struct elf32_arm_relocs_copied *p;
4444 if (h->root.type == bfd_link_hash_indirect)
4447 if (h->root.type == bfd_link_hash_warning)
4448 /* When warning symbols are created, they **replace** the "real"
4449 entry in the hash table, thus we never get to see the real
4450 symbol in a hash traversal. So look at it now. */
4451 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4453 info = (struct bfd_link_info *) inf;
4454 htab = elf32_arm_hash_table (info);
4456 if (htab->root.dynamic_sections_created
4457 && h->plt.refcount > 0)
4459 /* Make sure this symbol is output as a dynamic symbol.
4460 Undefined weak syms won't yet be marked as dynamic. */
4461 if (h->dynindx == -1
4462 && !h->forced_local)
4464 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4469 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4471 asection *s = htab->splt;
4473 /* If this is the first .plt entry, make room for the special
4476 s->size += htab->plt_header_size;
4478 h->plt.offset = s->size;
4480 /* If this symbol is not defined in a regular file, and we are
4481 not generating a shared library, then set the symbol to this
4482 location in the .plt. This is required to make function
4483 pointers compare as equal between the normal executable and
4484 the shared library. */
4488 h->root.u.def.section = s;
4489 h->root.u.def.value = h->plt.offset;
4492 /* Make room for this entry. */
4493 s->size += htab->plt_entry_size;
4495 if (!htab->symbian_p)
4496 /* We also need to make an entry in the .got.plt section, which
4497 will be placed in the .got section by the linker script. */
4498 htab->sgotplt->size += 4;
4500 /* We also need to make an entry in the .rel.plt section. */
4501 htab->srelplt->size += sizeof (Elf32_External_Rel);
4505 h->plt.offset = (bfd_vma) -1;
4511 h->plt.offset = (bfd_vma) -1;
4515 if (h->got.refcount > 0)
4520 /* Make sure this symbol is output as a dynamic symbol.
4521 Undefined weak syms won't yet be marked as dynamic. */
4522 if (h->dynindx == -1
4523 && !h->forced_local)
4525 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4529 if (!htab->symbian_p)
4532 h->got.offset = s->size;
4534 dyn = htab->root.dynamic_sections_created;
4535 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4536 || h->root.type != bfd_link_hash_undefweak)
4538 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
4539 htab->srelgot->size += sizeof (Elf32_External_Rel);
4543 h->got.offset = (bfd_vma) -1;
4545 eh = (struct elf32_arm_link_hash_entry *) h;
4546 if (eh->relocs_copied == NULL)
4549 /* In the shared -Bsymbolic case, discard space allocated for
4550 dynamic pc-relative relocs against symbols which turn out to be
4551 defined in regular objects. For the normal shared case, discard
4552 space for pc-relative relocs that have become local due to symbol
4553 visibility changes. */
4557 /* Discard relocs on undefined weak syms with non-default
4559 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4560 && h->root.type == bfd_link_hash_undefweak)
4561 eh->relocs_copied = NULL;
4565 /* For the non-shared case, discard space for relocs against
4566 symbols which turn out to need copy relocs or are not
4572 || (htab->root.dynamic_sections_created
4573 && (h->root.type == bfd_link_hash_undefweak
4574 || h->root.type == bfd_link_hash_undefined))))
4576 /* Make sure this symbol is output as a dynamic symbol.
4577 Undefined weak syms won't yet be marked as dynamic. */
4578 if (h->dynindx == -1
4579 && !h->forced_local)
4581 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4585 /* If that succeeded, we know we'll be keeping all the
4587 if (h->dynindx != -1)
4591 eh->relocs_copied = NULL;
4596 /* Finally, allocate space. */
4597 for (p = eh->relocs_copied; p != NULL; p = p->next)
4599 asection *sreloc = elf_section_data (p->section)->sreloc;
4600 sreloc->size += p->count * sizeof (Elf32_External_Rel);
4606 /* Find any dynamic relocs that apply to read-only sections. */
4609 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
4611 struct elf32_arm_link_hash_entry *eh;
4612 struct elf32_arm_relocs_copied *p;
4614 if (h->root.type == bfd_link_hash_warning)
4615 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4617 eh = (struct elf32_arm_link_hash_entry *) h;
4618 for (p = eh->relocs_copied; p != NULL; p = p->next)
4620 asection *s = p->section;
4622 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4624 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4626 info->flags |= DF_TEXTREL;
4628 /* Not an error, just cut short the traversal. */
4635 /* Set the sizes of the dynamic sections. */
4638 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4639 struct bfd_link_info * info)
4646 struct elf32_arm_link_hash_table *htab;
4648 htab = elf32_arm_hash_table (info);
4649 dynobj = elf_hash_table (info)->dynobj;
4650 BFD_ASSERT (dynobj != NULL);
4652 if (elf_hash_table (info)->dynamic_sections_created)
4654 /* Set the contents of the .interp section to the interpreter. */
4655 if (info->executable)
4657 s = bfd_get_section_by_name (dynobj, ".interp");
4658 BFD_ASSERT (s != NULL);
4659 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4660 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4664 /* Set up .got offsets for local syms, and space for local dynamic
4666 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4668 bfd_signed_vma *local_got;
4669 bfd_signed_vma *end_local_got;
4670 char *local_tls_type;
4671 bfd_size_type locsymcount;
4672 Elf_Internal_Shdr *symtab_hdr;
4675 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4678 for (s = ibfd->sections; s != NULL; s = s->next)
4680 struct elf32_arm_relocs_copied *p;
4682 for (p = *((struct elf32_arm_relocs_copied **)
4683 &elf_section_data (s)->local_dynrel);
4687 if (!bfd_is_abs_section (p->section)
4688 && bfd_is_abs_section (p->section->output_section))
4690 /* Input section has been discarded, either because
4691 it is a copy of a linkonce section or due to
4692 linker script /DISCARD/, so we'll be discarding
4695 else if (p->count != 0)
4697 srel = elf_section_data (p->section)->sreloc;
4698 srel->size += p->count * sizeof (Elf32_External_Rel);
4699 if ((p->section->output_section->flags & SEC_READONLY) != 0)
4700 info->flags |= DF_TEXTREL;
4705 local_got = elf_local_got_refcounts (ibfd);
4709 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4710 locsymcount = symtab_hdr->sh_info;
4711 end_local_got = local_got + locsymcount;
4713 srel = htab->srelgot;
4714 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
4718 *local_got = s->size;
4721 srel->size += sizeof (Elf32_External_Rel);
4724 *local_got = (bfd_vma) -1;
4728 /* Allocate global sym .plt and .got entries, and space for global
4729 sym dynamic relocs. */
4730 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
4732 /* The check_relocs and adjust_dynamic_symbol entry points have
4733 determined the sizes of the various dynamic sections. Allocate
4737 for (s = dynobj->sections; s != NULL; s = s->next)
4742 if ((s->flags & SEC_LINKER_CREATED) == 0)
4745 /* It's OK to base decisions on the section name, because none
4746 of the dynobj section names depend upon the input files. */
4747 name = bfd_get_section_name (dynobj, s);
4751 if (strcmp (name, ".plt") == 0)
4755 /* Strip this section if we don't need it; see the
4761 /* Remember whether there is a PLT. */
4765 else if (strncmp (name, ".rel", 4) == 0)
4769 /* If we don't need this section, strip it from the
4770 output file. This is mostly to handle .rel.bss and
4771 .rel.plt. We must create both sections in
4772 create_dynamic_sections, because they must be created
4773 before the linker maps input sections to output
4774 sections. The linker does that before
4775 adjust_dynamic_symbol is called, and it is that
4776 function which decides whether anything needs to go
4777 into these sections. */
4782 /* Remember whether there are any reloc sections other
4784 if (strcmp (name, ".rel.plt") != 0)
4787 /* We use the reloc_count field as a counter if we need
4788 to copy relocs into the output file. */
4792 else if (strncmp (name, ".got", 4) != 0)
4794 /* It's not one of our sections, so don't allocate space. */
4800 _bfd_strip_section_from_output (info, s);
4804 /* Allocate memory for the section contents. */
4805 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4806 if (s->contents == NULL && s->size != 0)
4810 if (elf_hash_table (info)->dynamic_sections_created)
4812 /* Add some entries to the .dynamic section. We fill in the
4813 values later, in elf32_arm_finish_dynamic_sections, but we
4814 must add the entries now so that we get the correct size for
4815 the .dynamic section. The DT_DEBUG entry is filled in by the
4816 dynamic linker and used by the debugger. */
4817 #define add_dynamic_entry(TAG, VAL) \
4818 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4822 if (!add_dynamic_entry (DT_DEBUG, 0))
4828 if ( !add_dynamic_entry (DT_PLTGOT, 0)
4829 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4830 || !add_dynamic_entry (DT_PLTREL, DT_REL)
4831 || !add_dynamic_entry (DT_JMPREL, 0))
4837 if ( !add_dynamic_entry (DT_REL, 0)
4838 || !add_dynamic_entry (DT_RELSZ, 0)
4839 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
4843 /* If any dynamic relocs apply to a read-only section,
4844 then we need a DT_TEXTREL entry. */
4845 if ((info->flags & DF_TEXTREL) == 0)
4846 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
4849 if ((info->flags & DF_TEXTREL) != 0)
4851 if (!add_dynamic_entry (DT_TEXTREL, 0))
4853 info->flags |= DF_TEXTREL;
4856 #undef add_synamic_entry
4861 /* Finish up dynamic symbol handling. We set the contents of various
4862 dynamic sections here. */
4865 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
4866 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
4869 struct elf32_arm_link_hash_table *htab;
4871 dynobj = elf_hash_table (info)->dynobj;
4872 htab = elf32_arm_hash_table (info);
4874 if (h->plt.offset != (bfd_vma) -1)
4880 Elf_Internal_Rela rel;
4882 /* This symbol has an entry in the procedure linkage table. Set
4885 BFD_ASSERT (h->dynindx != -1);
4887 splt = bfd_get_section_by_name (dynobj, ".plt");
4888 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
4889 BFD_ASSERT (splt != NULL && srel != NULL);
4891 /* Get the index in the procedure linkage table which
4892 corresponds to this symbol. This is the index of this symbol
4893 in all the symbols for which we are making plt entries. The
4894 first entry in the procedure linkage table is reserved. */
4895 plt_index = ((h->plt.offset - htab->plt_header_size)
4896 / htab->plt_entry_size);
4898 /* Fill in the entry in the procedure linkage table. */
4899 if (htab->symbian_p)
4902 for (i = 0; i < htab->plt_entry_size / 4; ++i)
4903 bfd_put_32 (output_bfd,
4904 elf32_arm_symbian_plt_entry[i],
4905 splt->contents + h->plt.offset + 4 * i);
4907 /* Fill in the entry in the .rel.plt section. */
4908 rel.r_offset = (splt->output_section->vma
4909 + splt->output_offset
4910 + h->plt.offset + 4 * (i - 1));
4911 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
4916 bfd_vma got_displacement;
4919 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4920 BFD_ASSERT (sgot != NULL);
4922 /* Get the offset into the .got table of the entry that
4923 corresponds to this function. Each .got entry is 4 bytes.
4924 The first three are reserved. */
4925 got_offset = (plt_index + 3) * 4;
4927 /* Calculate the displacement between the PLT slot and the
4928 entry in the GOT. */
4929 got_displacement = (sgot->output_section->vma
4930 + sgot->output_offset
4932 - splt->output_section->vma
4933 - splt->output_offset
4937 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
4939 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
4940 splt->contents + h->plt.offset + 0);
4941 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
4942 splt->contents + h->plt.offset + 4);
4943 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
4944 splt->contents + h->plt.offset + 8);
4945 #ifdef FOUR_WORD_PLT
4946 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
4947 splt->contents + h->plt.offset + 12);
4950 /* Fill in the entry in the global offset table. */
4951 bfd_put_32 (output_bfd,
4952 (splt->output_section->vma
4953 + splt->output_offset),
4954 sgot->contents + got_offset);
4956 /* Fill in the entry in the .rel.plt section. */
4957 rel.r_offset = (sgot->output_section->vma
4958 + sgot->output_offset
4960 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
4963 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
4964 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4966 if (!h->def_regular)
4968 /* Mark the symbol as undefined, rather than as defined in
4969 the .plt section. Leave the value alone. */
4970 sym->st_shndx = SHN_UNDEF;
4971 /* If the symbol is weak, we do need to clear the value.
4972 Otherwise, the PLT entry would provide a definition for
4973 the symbol even if the symbol wasn't defined anywhere,
4974 and so the symbol would never be NULL. */
4975 if (!h->ref_regular_nonweak)
4980 if (h->got.offset != (bfd_vma) -1)
4984 Elf_Internal_Rela rel;
4987 /* This symbol has an entry in the global offset table. Set it
4989 sgot = bfd_get_section_by_name (dynobj, ".got");
4990 srel = bfd_get_section_by_name (dynobj, ".rel.got");
4991 BFD_ASSERT (sgot != NULL && srel != NULL);
4993 rel.r_offset = (sgot->output_section->vma
4994 + sgot->output_offset
4995 + (h->got.offset &~ (bfd_vma) 1));
4997 /* If this is a static link, or it is a -Bsymbolic link and the
4998 symbol is defined locally or was forced to be local because
4999 of a version file, we just want to emit a RELATIVE reloc.
5000 The entry in the global offset table will already have been
5001 initialized in the relocate_section function. */
5003 && SYMBOL_REFERENCES_LOCAL (info, h))
5005 BFD_ASSERT((h->got.offset & 1) != 0);
5006 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5010 BFD_ASSERT((h->got.offset & 1) == 0);
5011 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5012 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5015 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5016 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5022 Elf_Internal_Rela rel;
5025 /* This symbol needs a copy reloc. Set it up. */
5026 BFD_ASSERT (h->dynindx != -1
5027 && (h->root.type == bfd_link_hash_defined
5028 || h->root.type == bfd_link_hash_defweak));
5030 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5032 BFD_ASSERT (s != NULL);
5034 rel.r_offset = (h->root.u.def.value
5035 + h->root.u.def.section->output_section->vma
5036 + h->root.u.def.section->output_offset);
5037 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5038 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5039 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5042 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5043 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5044 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5045 sym->st_shndx = SHN_ABS;
5050 /* Finish up the dynamic sections. */
5053 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5059 dynobj = elf_hash_table (info)->dynobj;
5061 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5062 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5063 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5065 if (elf_hash_table (info)->dynamic_sections_created)
5068 Elf32_External_Dyn *dyncon, *dynconend;
5069 struct elf32_arm_link_hash_table *htab;
5071 htab = elf32_arm_hash_table (info);
5072 splt = bfd_get_section_by_name (dynobj, ".plt");
5073 BFD_ASSERT (splt != NULL && sdyn != NULL);
5075 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5076 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5078 for (; dyncon < dynconend; dyncon++)
5080 Elf_Internal_Dyn dyn;
5084 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5095 goto get_vma_if_bpabi;
5098 goto get_vma_if_bpabi;
5101 goto get_vma_if_bpabi;
5103 name = ".gnu.version";
5104 goto get_vma_if_bpabi;
5106 name = ".gnu.version_d";
5107 goto get_vma_if_bpabi;
5109 name = ".gnu.version_r";
5110 goto get_vma_if_bpabi;
5118 s = bfd_get_section_by_name (output_bfd, name);
5119 BFD_ASSERT (s != NULL);
5120 if (!htab->symbian_p)
5121 dyn.d_un.d_ptr = s->vma;
5123 /* In the BPABI, tags in the PT_DYNAMIC section point
5124 at the file offset, not the memory address, for the
5125 convenience of the post linker. */
5126 dyn.d_un.d_ptr = s->filepos;
5127 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5131 if (htab->symbian_p)
5136 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5137 BFD_ASSERT (s != NULL);
5138 dyn.d_un.d_val = s->size;
5139 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5143 if (!htab->symbian_p)
5145 /* My reading of the SVR4 ABI indicates that the
5146 procedure linkage table relocs (DT_JMPREL) should be
5147 included in the overall relocs (DT_REL). This is
5148 what Solaris does. However, UnixWare can not handle
5149 that case. Therefore, we override the DT_RELSZ entry
5150 here to make it not include the JMPREL relocs. Since
5151 the linker script arranges for .rel.plt to follow all
5152 other relocation sections, we don't have to worry
5153 about changing the DT_REL entry. */
5154 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5156 dyn.d_un.d_val -= s->size;
5157 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5165 /* In the BPABI, the DT_REL tag must point at the file
5166 offset, not the VMA, of the first relocation
5167 section. So, we use code similar to that in
5168 elflink.c, but do not check for SHF_ALLOC on the
5169 relcoation section, since relocations sections are
5170 never allocated under the BPABI. The comments above
5171 about Unixware notwithstanding, we include all of the
5172 relocations here. */
5173 if (htab->symbian_p)
5176 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5177 ? SHT_REL : SHT_RELA);
5179 for (i = 1; i < elf_numsections (output_bfd); i++)
5181 Elf_Internal_Shdr *hdr
5182 = elf_elfsections (output_bfd)[i];
5183 if (hdr->sh_type == type)
5185 if (dyn.d_tag == DT_RELSZ
5186 || dyn.d_tag == DT_RELASZ)
5187 dyn.d_un.d_val += hdr->sh_size;
5188 else if (dyn.d_un.d_val == 0
5189 || hdr->sh_offset < dyn.d_un.d_val)
5190 dyn.d_un.d_val = hdr->sh_offset;
5193 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5197 /* Set the bottom bit of DT_INIT/FINI if the
5198 corresponding function is Thumb. */
5200 name = info->init_function;
5203 name = info->fini_function;
5205 /* If it wasn't set by elf_bfd_final_link
5206 then there is nothing to adjust. */
5207 if (dyn.d_un.d_val != 0)
5209 struct elf_link_hash_entry * eh;
5211 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5212 FALSE, FALSE, TRUE);
5213 if (eh != (struct elf_link_hash_entry *) NULL
5214 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5216 dyn.d_un.d_val |= 1;
5217 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5224 /* Fill in the first entry in the procedure linkage table. */
5225 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5227 bfd_vma got_displacement;
5229 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5230 got_displacement = (sgot->output_section->vma
5231 + sgot->output_offset
5232 - splt->output_section->vma
5233 - splt->output_offset
5236 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5237 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5238 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5239 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5240 #ifdef FOUR_WORD_PLT
5241 /* The displacement value goes in the otherwise-unused last word of
5242 the second entry. */
5243 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5245 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5249 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5250 really seem like the right value. */
5251 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5254 /* Fill in the first three entries in the global offset table. */
5260 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5262 bfd_put_32 (output_bfd,
5263 sdyn->output_section->vma + sdyn->output_offset,
5265 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5266 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5269 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5276 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5278 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5279 struct elf32_arm_link_hash_table *globals;
5281 i_ehdrp = elf_elfheader (abfd);
5283 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
5284 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
5288 globals = elf32_arm_hash_table (link_info);
5289 if (globals->byteswap_code)
5290 i_ehdrp->e_flags |= EF_ARM_BE8;
5294 static enum elf_reloc_type_class
5295 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
5297 switch ((int) ELF32_R_TYPE (rela->r_info))
5299 case R_ARM_RELATIVE:
5300 return reloc_class_relative;
5301 case R_ARM_JUMP_SLOT:
5302 return reloc_class_plt;
5304 return reloc_class_copy;
5306 return reloc_class_normal;
5310 /* Set the right machine number for an Arm ELF file. */
5313 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
5315 if (hdr->sh_type == SHT_NOTE)
5316 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5322 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
5324 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
5327 /* Return TRUE if this is an unwinding table entry. */
5330 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
5334 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
5335 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
5336 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
5337 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
5341 /* Set the type and flags for an ARM section. We do this by
5342 the section name, which is a hack, but ought to work. */
5345 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
5349 name = bfd_get_section_name (abfd, sec);
5351 if (is_arm_elf_unwind_section_name (abfd, name))
5353 hdr->sh_type = SHT_ARM_EXIDX;
5354 hdr->sh_flags |= SHF_LINK_ORDER;
5359 /* Handle an ARM specific section when reading an object file.
5360 This is called when elf.c finds a section with an unknown type. */
5363 elf32_arm_section_from_shdr (bfd *abfd,
5364 Elf_Internal_Shdr * hdr,
5367 /* There ought to be a place to keep ELF backend specific flags, but
5368 at the moment there isn't one. We just keep track of the
5369 sections by their name, instead. Fortunately, the ABI gives
5370 names for all the ARM specific sections, so we will probably get
5372 switch (hdr->sh_type)
5381 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
5387 /* Called for each symbol. Builds a section map based on mapping symbols.
5388 Does not alter any of the symbols. */
5391 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
5393 Elf_Internal_Sym *elfsym,
5394 asection *input_sec,
5395 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
5398 elf32_arm_section_map *map;
5399 struct elf32_arm_link_hash_table *globals;
5401 /* Only do this on final link. */
5402 if (info->relocatable)
5405 /* Only build a map if we need to byteswap code. */
5406 globals = elf32_arm_hash_table (info);
5407 if (!globals->byteswap_code)
5410 /* We only want mapping symbols. */
5411 if (! is_arm_mapping_symbol_name (name))
5414 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
5415 map = elf32_arm_section_data (input_sec)->map;
5416 /* TODO: This may be inefficient, but we probably don't usually have many
5417 mapping symbols per section. */
5418 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
5419 elf32_arm_section_data (input_sec)->map = map;
5421 map[mapcount - 1].vma = elfsym->st_value;
5422 map[mapcount - 1].type = name[1];
5427 /* Allocate target specific section data. */
5430 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
5432 struct _arm_elf_section_data *sdata;
5433 bfd_size_type amt = sizeof (*sdata);
5435 sdata = bfd_zalloc (abfd, amt);
5438 sec->used_by_bfd = sdata;
5440 return _bfd_elf_new_section_hook (abfd, sec);
5444 /* Used to order a list of mapping symbols by address. */
5447 elf32_arm_compare_mapping (const void * a, const void * b)
5449 return ((const elf32_arm_section_map *) a)->vma
5450 > ((const elf32_arm_section_map *) b)->vma;
5454 /* Do code byteswapping. Return FALSE afterwards so that the section is
5455 written out as normal. */
5458 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
5462 elf32_arm_section_map *map;
5469 mapcount = elf32_arm_section_data (sec)->mapcount;
5470 map = elf32_arm_section_data (sec)->map;
5475 qsort (map, mapcount, sizeof (elf32_arm_section_map),
5476 elf32_arm_compare_mapping);
5478 offset = sec->output_section->vma + sec->output_offset;
5479 ptr = map[0].vma - offset;
5480 for (i = 0; i < mapcount; i++)
5482 if (i == mapcount - 1)
5485 end = map[i + 1].vma - offset;
5487 switch (map[i].type)
5490 /* Byte swap code words. */
5491 while (ptr + 3 < end)
5493 tmp = contents[ptr];
5494 contents[ptr] = contents[ptr + 3];
5495 contents[ptr + 3] = tmp;
5496 tmp = contents[ptr + 1];
5497 contents[ptr + 1] = contents[ptr + 2];
5498 contents[ptr + 2] = tmp;
5504 /* Byte swap code halfwords. */
5505 while (ptr + 1 < end)
5507 tmp = contents[ptr];
5508 contents[ptr] = contents[ptr + 1];
5509 contents[ptr + 1] = tmp;
5515 /* Leave data alone. */
5524 #define ELF_ARCH bfd_arch_arm
5525 #define ELF_MACHINE_CODE EM_ARM
5526 #ifdef __QNXTARGET__
5527 #define ELF_MAXPAGESIZE 0x1000
5529 #define ELF_MAXPAGESIZE 0x8000
5532 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5533 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
5534 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5535 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5536 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
5537 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
5538 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
5539 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
5540 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
5542 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5543 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5544 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5545 #define elf_backend_check_relocs elf32_arm_check_relocs
5546 #define elf_backend_relocate_section elf32_arm_relocate_section
5547 #define elf_backend_write_section elf32_arm_write_section
5548 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5549 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
5550 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5551 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
5552 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
5553 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
5554 #define elf_backend_post_process_headers elf32_arm_post_process_headers
5555 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
5556 #define elf_backend_object_p elf32_arm_object_p
5557 #define elf_backend_section_flags elf32_arm_section_flags
5558 #define elf_backend_fake_sections elf32_arm_fake_sections
5559 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
5560 #define elf_backend_final_write_processing elf32_arm_final_write_processing
5561 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
5563 #define elf_backend_can_refcount 1
5564 #define elf_backend_can_gc_sections 1
5565 #define elf_backend_plt_readonly 1
5566 #define elf_backend_want_got_plt 1
5567 #define elf_backend_want_plt_sym 0
5569 #define elf_backend_rela_normal 1
5572 #define elf_backend_got_header_size 12
5574 #include "elf32-target.h"
5576 /* Symbian OS Targets */
5578 #undef TARGET_LITTLE_SYM
5579 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5580 #undef TARGET_LITTLE_NAME
5581 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5582 #undef TARGET_BIG_SYM
5583 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5584 #undef TARGET_BIG_NAME
5585 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
5587 /* Like elf32_arm_link_hash_table_create -- but overrides
5588 appropriately for Symbian OS. */
5589 static struct bfd_link_hash_table *
5590 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
5592 struct bfd_link_hash_table *ret;
5594 ret = elf32_arm_link_hash_table_create (abfd);
5597 struct elf32_arm_link_hash_table *htab
5598 = (struct elf32_arm_link_hash_table *)ret;
5599 /* There is no PLT header for Symbian OS. */
5600 htab->plt_header_size = 0;
5601 /* The PLT entries are each three instructions. */
5602 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
5603 htab->symbian_p = 1;
5608 /* In a BPABI executable, the dynamic linking sections do not go in
5609 the loadable read-only segment. The post-linker may wish to refer
5610 to these sections, but they are not part of the final program
5612 static struct bfd_elf_special_section const
5613 elf32_arm_symbian_special_sections[]=
5615 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
5616 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
5617 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
5618 { ".got", 4, 0, SHT_PROGBITS, 0 },
5619 { ".hash", 5, 0, SHT_HASH, 0 },
5620 { NULL, 0, 0, 0, 0 }
5624 elf32_arm_symbian_begin_write_processing (bfd *abfd,
5625 struct bfd_link_info *link_info
5628 /* BPABI objects are never loaded directly by an OS kernel; they are
5629 processed by a postlinker first, into an OS-specific format. If
5630 the D_PAGED bit is set on the file, BFD will align segments on
5631 page boundaries, so that an OS can directly map the file. With
5632 BPABI objects, that just results in wasted space. In addition,
5633 because we clear the D_PAGED bit, map_sections_to_segments will
5634 recognize that the program headers should not be mapped into any
5635 loadable segment. */
5636 abfd->flags &= ~D_PAGED;
5640 elf32_arm_symbian_modify_segment_map (bfd *abfd,
5641 struct bfd_link_info *info
5644 struct elf_segment_map *m;
5647 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5648 segment. However, because the .dynamic section is not marked
5649 with SEC_LOAD, the generic ELF code will not create such a
5651 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
5654 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
5655 m->next = elf_tdata (abfd)->segment_map;
5656 elf_tdata (abfd)->segment_map = m;
5663 #define elf32_bed elf32_arm_symbian_bed
5665 /* The dynamic sections are not allocated on SymbianOS; the postlinker
5666 will process them and then discard them. */
5667 #undef ELF_DYNAMIC_SEC_FLAGS
5668 #define ELF_DYNAMIC_SEC_FLAGS \
5669 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
5671 #undef bfd_elf32_bfd_link_hash_table_create
5672 #define bfd_elf32_bfd_link_hash_table_create \
5673 elf32_arm_symbian_link_hash_table_create
5675 #undef elf_backend_special_sections
5676 #define elf_backend_special_sections elf32_arm_symbian_special_sections
5678 #undef elf_backend_begin_write_processing
5679 #define elf_backend_begin_write_processing \
5680 elf32_arm_symbian_begin_write_processing
5682 #undef elf_backend_modify_segment_map
5683 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
5685 /* There is no .got section for BPABI objects, and hence no header. */
5686 #undef elf_backend_got_header_size
5687 #define elf_backend_got_header_size 0
5689 /* Similarly, there is no .got.plt section. */
5690 #undef elf_backend_want_got_plt
5691 #define elf_backend_want_got_plt 0
5693 #include "elf32-target.h"