1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
31 #define elf_info_to_howto 0
32 #define elf_info_to_howto_rel elf32_arm_info_to_howto
34 #define ARM_ELF_ABI_VERSION 0
35 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
37 static reloc_howto_type * elf32_arm_reloc_type_lookup
38 PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
39 static bfd_boolean elf32_arm_nabi_grok_prstatus
40 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
41 static bfd_boolean elf32_arm_nabi_grok_psinfo
42 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
45 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
48 static reloc_howto_type elf32_arm_howto_table[] =
51 HOWTO (R_ARM_NONE, /* type */
53 0, /* size (0 = byte, 1 = short, 2 = long) */
55 FALSE, /* pc_relative */
57 complain_overflow_dont,/* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_ARM_NONE", /* name */
60 FALSE, /* partial_inplace */
63 FALSE), /* pcrel_offset */
65 HOWTO (R_ARM_PC24, /* type */
67 2, /* size (0 = byte, 1 = short, 2 = long) */
69 TRUE, /* pc_relative */
71 complain_overflow_signed,/* complain_on_overflow */
72 bfd_elf_generic_reloc, /* special_function */
73 "R_ARM_PC24", /* name */
74 FALSE, /* partial_inplace */
75 0x00ffffff, /* src_mask */
76 0x00ffffff, /* dst_mask */
77 TRUE), /* pcrel_offset */
80 HOWTO (R_ARM_ABS32, /* type */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
84 FALSE, /* pc_relative */
86 complain_overflow_bitfield,/* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_ARM_ABS32", /* name */
89 FALSE, /* partial_inplace */
90 0xffffffff, /* src_mask */
91 0xffffffff, /* dst_mask */
92 FALSE), /* pcrel_offset */
94 /* standard 32bit pc-relative reloc */
95 HOWTO (R_ARM_REL32, /* type */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
99 TRUE, /* pc_relative */
101 complain_overflow_bitfield,/* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_ARM_REL32", /* name */
104 FALSE, /* partial_inplace */
105 0xffffffff, /* src_mask */
106 0xffffffff, /* dst_mask */
107 TRUE), /* pcrel_offset */
110 HOWTO (R_ARM_PC13, /* type */
112 0, /* size (0 = byte, 1 = short, 2 = long) */
114 FALSE, /* pc_relative */
116 complain_overflow_bitfield,/* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_ARM_PC13", /* name */
119 FALSE, /* partial_inplace */
120 0x000000ff, /* src_mask */
121 0x000000ff, /* dst_mask */
122 FALSE), /* pcrel_offset */
124 /* 16 bit absolute */
125 HOWTO (R_ARM_ABS16, /* type */
127 1, /* size (0 = byte, 1 = short, 2 = long) */
129 FALSE, /* pc_relative */
131 complain_overflow_bitfield,/* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_ARM_ABS16", /* name */
134 FALSE, /* partial_inplace */
135 0x0000ffff, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 FALSE), /* pcrel_offset */
139 /* 12 bit absolute */
140 HOWTO (R_ARM_ABS12, /* type */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
144 FALSE, /* pc_relative */
146 complain_overflow_bitfield,/* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_ARM_ABS12", /* name */
149 FALSE, /* partial_inplace */
150 0x000008ff, /* src_mask */
151 0x000008ff, /* dst_mask */
152 FALSE), /* pcrel_offset */
154 HOWTO (R_ARM_THM_ABS5, /* type */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
158 FALSE, /* pc_relative */
160 complain_overflow_bitfield,/* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_ARM_THM_ABS5", /* name */
163 FALSE, /* partial_inplace */
164 0x000007e0, /* src_mask */
165 0x000007e0, /* dst_mask */
166 FALSE), /* pcrel_offset */
169 HOWTO (R_ARM_ABS8, /* type */
171 0, /* size (0 = byte, 1 = short, 2 = long) */
173 FALSE, /* pc_relative */
175 complain_overflow_bitfield,/* complain_on_overflow */
176 bfd_elf_generic_reloc, /* special_function */
177 "R_ARM_ABS8", /* name */
178 FALSE, /* partial_inplace */
179 0x000000ff, /* src_mask */
180 0x000000ff, /* dst_mask */
181 FALSE), /* pcrel_offset */
183 HOWTO (R_ARM_SBREL32, /* type */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
187 FALSE, /* pc_relative */
189 complain_overflow_dont,/* complain_on_overflow */
190 bfd_elf_generic_reloc, /* special_function */
191 "R_ARM_SBREL32", /* name */
192 FALSE, /* partial_inplace */
193 0xffffffff, /* src_mask */
194 0xffffffff, /* dst_mask */
195 FALSE), /* pcrel_offset */
197 HOWTO (R_ARM_THM_PC22, /* type */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
201 TRUE, /* pc_relative */
203 complain_overflow_signed,/* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_ARM_THM_PC22", /* name */
206 FALSE, /* partial_inplace */
207 0x07ff07ff, /* src_mask */
208 0x07ff07ff, /* dst_mask */
209 TRUE), /* pcrel_offset */
211 HOWTO (R_ARM_THM_PC8, /* type */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
215 TRUE, /* pc_relative */
217 complain_overflow_signed,/* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_ARM_THM_PC8", /* name */
220 FALSE, /* partial_inplace */
221 0x000000ff, /* src_mask */
222 0x000000ff, /* dst_mask */
223 TRUE), /* pcrel_offset */
225 HOWTO (R_ARM_AMP_VCALL9, /* type */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
229 TRUE, /* pc_relative */
231 complain_overflow_signed,/* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_ARM_AMP_VCALL9", /* name */
234 FALSE, /* partial_inplace */
235 0x000000ff, /* src_mask */
236 0x000000ff, /* dst_mask */
237 TRUE), /* pcrel_offset */
239 HOWTO (R_ARM_SWI24, /* type */
241 0, /* size (0 = byte, 1 = short, 2 = long) */
243 FALSE, /* pc_relative */
245 complain_overflow_signed,/* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_ARM_SWI24", /* name */
248 FALSE, /* partial_inplace */
249 0x00000000, /* src_mask */
250 0x00000000, /* dst_mask */
251 FALSE), /* pcrel_offset */
253 HOWTO (R_ARM_THM_SWI8, /* type */
255 0, /* size (0 = byte, 1 = short, 2 = long) */
257 FALSE, /* pc_relative */
259 complain_overflow_signed,/* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_ARM_SWI8", /* name */
262 FALSE, /* partial_inplace */
263 0x00000000, /* src_mask */
264 0x00000000, /* dst_mask */
265 FALSE), /* pcrel_offset */
267 /* BLX instruction for the ARM. */
268 HOWTO (R_ARM_XPC25, /* type */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
272 TRUE, /* pc_relative */
274 complain_overflow_signed,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_ARM_XPC25", /* name */
277 FALSE, /* partial_inplace */
278 0x00ffffff, /* src_mask */
279 0x00ffffff, /* dst_mask */
280 TRUE), /* pcrel_offset */
282 /* BLX instruction for the Thumb. */
283 HOWTO (R_ARM_THM_XPC22, /* type */
285 2, /* size (0 = byte, 1 = short, 2 = long) */
287 TRUE, /* pc_relative */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_ARM_THM_XPC22", /* name */
292 FALSE, /* partial_inplace */
293 0x07ff07ff, /* src_mask */
294 0x07ff07ff, /* dst_mask */
295 TRUE), /* pcrel_offset */
297 /* These next three relocs are not defined, but we need to fill the space. */
299 HOWTO (R_ARM_NONE, /* type */
301 0, /* size (0 = byte, 1 = short, 2 = long) */
303 FALSE, /* pc_relative */
305 complain_overflow_dont,/* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_ARM_unknown_17", /* name */
308 FALSE, /* partial_inplace */
311 FALSE), /* pcrel_offset */
313 HOWTO (R_ARM_NONE, /* type */
315 0, /* size (0 = byte, 1 = short, 2 = long) */
317 FALSE, /* pc_relative */
319 complain_overflow_dont,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_unknown_18", /* name */
322 FALSE, /* partial_inplace */
325 FALSE), /* pcrel_offset */
327 HOWTO (R_ARM_NONE, /* type */
329 0, /* size (0 = byte, 1 = short, 2 = long) */
331 FALSE, /* pc_relative */
333 complain_overflow_dont,/* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_ARM_unknown_19", /* name */
336 FALSE, /* partial_inplace */
339 FALSE), /* pcrel_offset */
341 /* Relocs used in ARM Linux */
343 HOWTO (R_ARM_COPY, /* type */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
347 FALSE, /* pc_relative */
349 complain_overflow_bitfield,/* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_ARM_COPY", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE), /* pcrel_offset */
357 HOWTO (R_ARM_GLOB_DAT, /* type */
359 2, /* size (0 = byte, 1 = short, 2 = long) */
361 FALSE, /* pc_relative */
363 complain_overflow_bitfield,/* complain_on_overflow */
364 bfd_elf_generic_reloc, /* special_function */
365 "R_ARM_GLOB_DAT", /* name */
366 TRUE, /* partial_inplace */
367 0xffffffff, /* src_mask */
368 0xffffffff, /* dst_mask */
369 FALSE), /* pcrel_offset */
371 HOWTO (R_ARM_JUMP_SLOT, /* type */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
375 FALSE, /* pc_relative */
377 complain_overflow_bitfield,/* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_ARM_JUMP_SLOT", /* name */
380 TRUE, /* partial_inplace */
381 0xffffffff, /* src_mask */
382 0xffffffff, /* dst_mask */
383 FALSE), /* pcrel_offset */
385 HOWTO (R_ARM_RELATIVE, /* type */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
389 FALSE, /* pc_relative */
391 complain_overflow_bitfield,/* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_ARM_RELATIVE", /* name */
394 TRUE, /* partial_inplace */
395 0xffffffff, /* src_mask */
396 0xffffffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
399 HOWTO (R_ARM_GOTOFF, /* type */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
403 FALSE, /* pc_relative */
405 complain_overflow_bitfield,/* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_ARM_GOTOFF", /* name */
408 TRUE, /* partial_inplace */
409 0xffffffff, /* src_mask */
410 0xffffffff, /* dst_mask */
411 FALSE), /* pcrel_offset */
413 HOWTO (R_ARM_GOTPC, /* type */
415 2, /* size (0 = byte, 1 = short, 2 = long) */
417 TRUE, /* pc_relative */
419 complain_overflow_bitfield,/* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_ARM_GOTPC", /* name */
422 TRUE, /* partial_inplace */
423 0xffffffff, /* src_mask */
424 0xffffffff, /* dst_mask */
425 TRUE), /* pcrel_offset */
427 HOWTO (R_ARM_GOT32, /* type */
429 2, /* size (0 = byte, 1 = short, 2 = long) */
431 FALSE, /* pc_relative */
433 complain_overflow_bitfield,/* complain_on_overflow */
434 bfd_elf_generic_reloc, /* special_function */
435 "R_ARM_GOT32", /* name */
436 TRUE, /* partial_inplace */
437 0xffffffff, /* src_mask */
438 0xffffffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
441 HOWTO (R_ARM_PLT32, /* type */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
445 TRUE, /* pc_relative */
447 complain_overflow_bitfield,/* complain_on_overflow */
448 bfd_elf_generic_reloc, /* special_function */
449 "R_ARM_PLT32", /* name */
450 TRUE, /* partial_inplace */
451 0x00ffffff, /* src_mask */
452 0x00ffffff, /* dst_mask */
453 TRUE), /* pcrel_offset */
455 HOWTO (R_ARM_CALL, /* type */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
459 TRUE, /* pc_relative */
461 complain_overflow_signed,/* complain_on_overflow */
462 bfd_elf_generic_reloc, /* special_function */
463 "R_ARM_CALL", /* name */
464 FALSE, /* partial_inplace */
465 0x00ffffff, /* src_mask */
466 0x00ffffff, /* dst_mask */
467 TRUE), /* pcrel_offset */
469 HOWTO (R_ARM_JUMP24, /* type */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 TRUE, /* pc_relative */
475 complain_overflow_signed,/* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_ARM_JUMP24", /* name */
478 FALSE, /* partial_inplace */
479 0x00ffffff, /* src_mask */
480 0x00ffffff, /* dst_mask */
481 TRUE), /* pcrel_offset */
483 HOWTO (R_ARM_NONE, /* type */
485 0, /* size (0 = byte, 1 = short, 2 = long) */
487 FALSE, /* pc_relative */
489 complain_overflow_dont,/* complain_on_overflow */
490 bfd_elf_generic_reloc, /* special_function */
491 "R_ARM_unknown_30", /* name */
492 FALSE, /* partial_inplace */
495 FALSE), /* pcrel_offset */
497 HOWTO (R_ARM_NONE, /* type */
499 0, /* size (0 = byte, 1 = short, 2 = long) */
501 FALSE, /* pc_relative */
503 complain_overflow_dont,/* complain_on_overflow */
504 bfd_elf_generic_reloc, /* special_function */
505 "R_ARM_unknown_31", /* name */
506 FALSE, /* partial_inplace */
509 FALSE), /* pcrel_offset */
511 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
515 TRUE, /* pc_relative */
517 complain_overflow_dont,/* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_ARM_ALU_PCREL_7_0", /* name */
520 FALSE, /* partial_inplace */
521 0x00000fff, /* src_mask */
522 0x00000fff, /* dst_mask */
523 TRUE), /* pcrel_offset */
525 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
529 TRUE, /* pc_relative */
531 complain_overflow_dont,/* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_ARM_ALU_PCREL_15_8",/* name */
534 FALSE, /* partial_inplace */
535 0x00000fff, /* src_mask */
536 0x00000fff, /* dst_mask */
537 TRUE), /* pcrel_offset */
539 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
543 TRUE, /* pc_relative */
545 complain_overflow_dont,/* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_ARM_ALU_PCREL_23_15",/* name */
548 FALSE, /* partial_inplace */
549 0x00000fff, /* src_mask */
550 0x00000fff, /* dst_mask */
551 TRUE), /* pcrel_offset */
553 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
555 2, /* size (0 = byte, 1 = short, 2 = long) */
557 FALSE, /* pc_relative */
559 complain_overflow_dont,/* complain_on_overflow */
560 bfd_elf_generic_reloc, /* special_function */
561 "R_ARM_LDR_SBREL_11_0",/* name */
562 FALSE, /* partial_inplace */
563 0x00000fff, /* src_mask */
564 0x00000fff, /* dst_mask */
565 FALSE), /* pcrel_offset */
567 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
569 2, /* size (0 = byte, 1 = short, 2 = long) */
571 FALSE, /* pc_relative */
573 complain_overflow_dont,/* complain_on_overflow */
574 bfd_elf_generic_reloc, /* special_function */
575 "R_ARM_ALU_SBREL_19_12",/* name */
576 FALSE, /* partial_inplace */
577 0x000ff000, /* src_mask */
578 0x000ff000, /* dst_mask */
579 FALSE), /* pcrel_offset */
581 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
583 2, /* size (0 = byte, 1 = short, 2 = long) */
585 FALSE, /* pc_relative */
587 complain_overflow_dont,/* complain_on_overflow */
588 bfd_elf_generic_reloc, /* special_function */
589 "R_ARM_ALU_SBREL_27_20",/* name */
590 FALSE, /* partial_inplace */
591 0x0ff00000, /* src_mask */
592 0x0ff00000, /* dst_mask */
593 FALSE), /* pcrel_offset */
595 HOWTO (R_ARM_TARGET1, /* type */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
599 FALSE, /* pc_relative */
601 complain_overflow_dont,/* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_ARM_TARGET1", /* name */
604 FALSE, /* partial_inplace */
605 0xffffffff, /* src_mask */
606 0xffffffff, /* dst_mask */
607 FALSE), /* pcrel_offset */
609 HOWTO (R_ARM_ROSEGREL32, /* type */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
613 FALSE, /* pc_relative */
615 complain_overflow_dont,/* complain_on_overflow */
616 bfd_elf_generic_reloc, /* special_function */
617 "R_ARM_ROSEGREL32", /* name */
618 FALSE, /* partial_inplace */
619 0xffffffff, /* src_mask */
620 0xffffffff, /* dst_mask */
621 FALSE), /* pcrel_offset */
623 HOWTO (R_ARM_V4BX, /* type */
625 2, /* size (0 = byte, 1 = short, 2 = long) */
627 FALSE, /* pc_relative */
629 complain_overflow_dont,/* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 "R_ARM_V4BX", /* name */
632 FALSE, /* partial_inplace */
633 0xffffffff, /* src_mask */
634 0xffffffff, /* dst_mask */
635 FALSE), /* pcrel_offset */
637 HOWTO (R_ARM_TARGET2, /* type */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
641 FALSE, /* pc_relative */
643 complain_overflow_signed,/* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_ARM_TARGET2", /* name */
646 FALSE, /* partial_inplace */
647 0xffffffff, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
651 HOWTO (R_ARM_PREL31, /* type */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
655 TRUE, /* pc_relative */
657 complain_overflow_signed,/* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_ARM_PREL31", /* name */
660 FALSE, /* partial_inplace */
661 0x7fffffff, /* src_mask */
662 0x7fffffff, /* dst_mask */
663 TRUE), /* pcrel_offset */
666 /* GNU extension to record C++ vtable hierarchy */
667 static reloc_howto_type elf32_arm_vtinherit_howto =
668 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
670 2, /* size (0 = byte, 1 = short, 2 = long) */
672 FALSE, /* pc_relative */
674 complain_overflow_dont, /* complain_on_overflow */
675 NULL, /* special_function */
676 "R_ARM_GNU_VTINHERIT", /* name */
677 FALSE, /* partial_inplace */
680 FALSE); /* pcrel_offset */
682 /* GNU extension to record C++ vtable member usage */
683 static reloc_howto_type elf32_arm_vtentry_howto =
684 HOWTO (R_ARM_GNU_VTENTRY, /* type */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
688 FALSE, /* pc_relative */
690 complain_overflow_dont, /* complain_on_overflow */
691 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
692 "R_ARM_GNU_VTENTRY", /* name */
693 FALSE, /* partial_inplace */
696 FALSE); /* pcrel_offset */
698 /* 12 bit pc relative */
699 static reloc_howto_type elf32_arm_thm_pc11_howto =
700 HOWTO (R_ARM_THM_PC11, /* type */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
704 TRUE, /* pc_relative */
706 complain_overflow_signed, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 "R_ARM_THM_PC11", /* name */
709 FALSE, /* partial_inplace */
710 0x000007ff, /* src_mask */
711 0x000007ff, /* dst_mask */
712 TRUE); /* pcrel_offset */
714 /* 12 bit pc relative */
715 static reloc_howto_type elf32_arm_thm_pc9_howto =
716 HOWTO (R_ARM_THM_PC9, /* type */
718 1, /* size (0 = byte, 1 = short, 2 = long) */
720 TRUE, /* pc_relative */
722 complain_overflow_signed, /* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_ARM_THM_PC9", /* name */
725 FALSE, /* partial_inplace */
726 0x000000ff, /* src_mask */
727 0x000000ff, /* dst_mask */
728 TRUE); /* pcrel_offset */
730 /* Place relative GOT-indirect. */
731 static reloc_howto_type elf32_arm_got_prel =
732 HOWTO (R_ARM_GOT_PREL, /* type */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
736 TRUE, /* pc_relative */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_ARM_GOT_PREL", /* name */
741 FALSE, /* partial_inplace */
742 0xffffffff, /* src_mask */
743 0xffffffff, /* dst_mask */
744 TRUE); /* pcrel_offset */
746 /* Currently unused relocations. */
747 static reloc_howto_type elf32_arm_r_howto[4] =
749 HOWTO (R_ARM_RREL32, /* type */
751 0, /* size (0 = byte, 1 = short, 2 = long) */
753 FALSE, /* pc_relative */
755 complain_overflow_dont,/* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_ARM_RREL32", /* name */
758 FALSE, /* partial_inplace */
761 FALSE), /* pcrel_offset */
763 HOWTO (R_ARM_RABS32, /* type */
765 0, /* size (0 = byte, 1 = short, 2 = long) */
767 FALSE, /* pc_relative */
769 complain_overflow_dont,/* complain_on_overflow */
770 bfd_elf_generic_reloc, /* special_function */
771 "R_ARM_RABS32", /* name */
772 FALSE, /* partial_inplace */
775 FALSE), /* pcrel_offset */
777 HOWTO (R_ARM_RPC24, /* type */
779 0, /* size (0 = byte, 1 = short, 2 = long) */
781 FALSE, /* pc_relative */
783 complain_overflow_dont,/* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_ARM_RPC24", /* name */
786 FALSE, /* partial_inplace */
789 FALSE), /* pcrel_offset */
791 HOWTO (R_ARM_RBASE, /* type */
793 0, /* size (0 = byte, 1 = short, 2 = long) */
795 FALSE, /* pc_relative */
797 complain_overflow_dont,/* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_ARM_RBASE", /* name */
800 FALSE, /* partial_inplace */
803 FALSE) /* pcrel_offset */
806 static reloc_howto_type *
807 elf32_arm_howto_from_type (unsigned int r_type)
809 if (r_type < NUM_ELEM (elf32_arm_howto_table))
810 return &elf32_arm_howto_table[r_type];
815 return &elf32_arm_got_prel;
817 case R_ARM_GNU_VTINHERIT:
818 return &elf32_arm_vtinherit_howto;
820 case R_ARM_GNU_VTENTRY:
821 return &elf32_arm_vtentry_howto;
824 return &elf32_arm_thm_pc11_howto;
827 return &elf32_arm_thm_pc9_howto;
833 return &elf32_arm_r_howto[r_type - R_ARM_RREL32];
841 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
842 Elf_Internal_Rela * elf_reloc)
846 r_type = ELF32_R_TYPE (elf_reloc->r_info);
847 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
850 struct elf32_arm_reloc_map
852 bfd_reloc_code_real_type bfd_reloc_val;
853 unsigned char elf_reloc_val;
856 /* All entries in this list must also be present in elf32_arm_howto_table. */
857 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
859 {BFD_RELOC_NONE, R_ARM_NONE},
860 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
861 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
862 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
863 {BFD_RELOC_32, R_ARM_ABS32},
864 {BFD_RELOC_32_PCREL, R_ARM_REL32},
865 {BFD_RELOC_8, R_ARM_ABS8},
866 {BFD_RELOC_16, R_ARM_ABS16},
867 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
868 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
869 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22},
870 {BFD_RELOC_ARM_COPY, R_ARM_COPY},
871 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
872 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
873 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
874 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF},
875 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
876 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
877 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
878 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
879 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
880 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
881 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
882 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}
885 static reloc_howto_type *
886 elf32_arm_reloc_type_lookup (abfd, code)
887 bfd *abfd ATTRIBUTE_UNUSED;
888 bfd_reloc_code_real_type code;
894 case BFD_RELOC_VTABLE_INHERIT:
895 return & elf32_arm_vtinherit_howto;
897 case BFD_RELOC_VTABLE_ENTRY:
898 return & elf32_arm_vtentry_howto;
900 case BFD_RELOC_THUMB_PCREL_BRANCH12:
901 return & elf32_arm_thm_pc11_howto;
903 case BFD_RELOC_THUMB_PCREL_BRANCH9:
904 return & elf32_arm_thm_pc9_howto;
907 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
908 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
909 return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
915 /* Support for core dump NOTE sections */
917 elf32_arm_nabi_grok_prstatus (abfd, note)
919 Elf_Internal_Note *note;
924 switch (note->descsz)
929 case 148: /* Linux/ARM 32-bit*/
931 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
934 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
943 /* Make a ".reg/999" section. */
944 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
945 size, note->descpos + offset);
949 elf32_arm_nabi_grok_psinfo (abfd, note)
951 Elf_Internal_Note *note;
953 switch (note->descsz)
958 case 124: /* Linux/ARM elf_prpsinfo */
959 elf_tdata (abfd)->core_program
960 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
961 elf_tdata (abfd)->core_command
962 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
965 /* Note that for some reason, a spurious space is tacked
966 onto the end of the args in some (at least one anyway)
967 implementations, so strip it off if it exists. */
970 char *command = elf_tdata (abfd)->core_command;
971 int n = strlen (command);
973 if (0 < n && command[n - 1] == ' ')
974 command[n - 1] = '\0';
980 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
981 #define TARGET_LITTLE_NAME "elf32-littlearm"
982 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
983 #define TARGET_BIG_NAME "elf32-bigarm"
985 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
986 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
988 typedef unsigned long int insn32;
989 typedef unsigned short int insn16;
991 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
992 #define INTERWORK_FLAG(abfd) \
993 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
994 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
996 /* The linker script knows the section names for placement.
997 The entry_names are used to do simple name mangling on the stubs.
998 Given a function name, and its type, the stub can be found. The
999 name can be changed. The only requirement is the %s be present. */
1000 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1001 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1003 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1004 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1006 /* The name of the dynamic interpreter. This is put in the .interp
1008 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1010 #ifdef FOUR_WORD_PLT
1012 /* The first entry in a procedure linkage table looks like
1013 this. It is set up so that any shared library function that is
1014 called before the relocation has been set up calls the dynamic
1016 static const bfd_vma elf32_arm_plt0_entry [] =
1018 0xe52de004, /* str lr, [sp, #-4]! */
1019 0xe59fe010, /* ldr lr, [pc, #16] */
1020 0xe08fe00e, /* add lr, pc, lr */
1021 0xe5bef008, /* ldr pc, [lr, #8]! */
1024 /* Subsequent entries in a procedure linkage table look like
1026 static const bfd_vma elf32_arm_plt_entry [] =
1028 0xe28fc600, /* add ip, pc, #NN */
1029 0xe28cca00, /* add ip, ip, #NN */
1030 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1031 0x00000000, /* unused */
1036 /* The first entry in a procedure linkage table looks like
1037 this. It is set up so that any shared library function that is
1038 called before the relocation has been set up calls the dynamic
1040 static const bfd_vma elf32_arm_plt0_entry [] =
1042 0xe52de004, /* str lr, [sp, #-4]! */
1043 0xe59fe004, /* ldr lr, [pc, #4] */
1044 0xe08fe00e, /* add lr, pc, lr */
1045 0xe5bef008, /* ldr pc, [lr, #8]! */
1046 0x00000000, /* &GOT[0] - . */
1049 /* Subsequent entries in a procedure linkage table look like
1051 static const bfd_vma elf32_arm_plt_entry [] =
1053 0xe28fc600, /* add ip, pc, #0xNN00000 */
1054 0xe28cca00, /* add ip, ip, #0xNN000 */
1055 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1060 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1061 #define PLT_THUMB_STUB_SIZE 4
1062 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1068 /* The entries in a PLT when using a DLL-based target with multiple
1070 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1072 0xe51ff004, /* ldr pc, [pc, #-4] */
1073 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1076 /* Used to build a map of a section. This is required for mixed-endian
1079 typedef struct elf32_elf_section_map
1084 elf32_arm_section_map;
1086 struct _arm_elf_section_data
1088 struct bfd_elf_section_data elf;
1090 elf32_arm_section_map *map;
1093 #define elf32_arm_section_data(sec) \
1094 ((struct _arm_elf_section_data *) elf_section_data (sec))
1096 /* The ARM linker needs to keep track of the number of relocs that it
1097 decides to copy in check_relocs for each symbol. This is so that
1098 it can discard PC relative relocs if it doesn't need them when
1099 linking with -Bsymbolic. We store the information in a field
1100 extending the regular ELF linker hash table. */
1102 /* This structure keeps track of the number of PC relative relocs we
1103 have copied for a given symbol. */
1104 struct elf32_arm_relocs_copied
1107 struct elf32_arm_relocs_copied * next;
1108 /* A section in dynobj. */
1110 /* Number of relocs copied in this section. */
1111 bfd_size_type count;
1114 /* Arm ELF linker hash entry. */
1115 struct elf32_arm_link_hash_entry
1117 struct elf_link_hash_entry root;
1119 /* Number of PC relative relocs copied for this symbol. */
1120 struct elf32_arm_relocs_copied * relocs_copied;
1122 /* We reference count Thumb references to a PLT entry separately,
1123 so that we can emit the Thumb trampoline only if needed. */
1124 bfd_signed_vma plt_thumb_refcount;
1126 /* Since PLT entries have variable size if the Thumb prologue is
1127 used, we need to record the index into .got.plt instead of
1128 recomputing it from the PLT offset. */
1129 bfd_signed_vma plt_got_offset;
1132 /* Traverse an arm ELF linker hash table. */
1133 #define elf32_arm_link_hash_traverse(table, func, info) \
1134 (elf_link_hash_traverse \
1136 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1139 /* Get the ARM elf linker hash table from a link_info structure. */
1140 #define elf32_arm_hash_table(info) \
1141 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1143 /* ARM ELF linker hash table. */
1144 struct elf32_arm_link_hash_table
1146 /* The main hash table. */
1147 struct elf_link_hash_table root;
1149 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1150 bfd_size_type thumb_glue_size;
1152 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1153 bfd_size_type arm_glue_size;
1155 /* An arbitrary input BFD chosen to hold the glue sections. */
1156 bfd * bfd_of_glue_owner;
1158 /* Nonzero to output a BE8 image. */
1161 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1162 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1165 /* The relocation to use for R_ARM_TARGET2 relocations. */
1168 /* Nonzero to fix BX instructions for ARMv4 targets. */
1171 /* The number of bytes in the initial entry in the PLT. */
1172 bfd_size_type plt_header_size;
1174 /* The number of bytes in the subsequent PLT etries. */
1175 bfd_size_type plt_entry_size;
1177 /* True if the target system is Symbian OS. */
1180 /* True if the target uses REL relocations. */
1183 /* Short-cuts to get to dynamic linker sections. */
1192 /* Small local sym to section mapping cache. */
1193 struct sym_sec_cache sym_sec;
1195 /* For convenience in allocate_dynrelocs. */
1199 /* Create an entry in an ARM ELF linker hash table. */
1201 static struct bfd_hash_entry *
1202 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1203 struct bfd_hash_table * table,
1204 const char * string)
1206 struct elf32_arm_link_hash_entry * ret =
1207 (struct elf32_arm_link_hash_entry *) entry;
1209 /* Allocate the structure if it has not already been allocated by a
1211 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1212 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1214 return (struct bfd_hash_entry *) ret;
1216 /* Call the allocation method of the superclass. */
1217 ret = ((struct elf32_arm_link_hash_entry *)
1218 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1222 ret->relocs_copied = NULL;
1223 ret->plt_thumb_refcount = 0;
1224 ret->plt_got_offset = -1;
1227 return (struct bfd_hash_entry *) ret;
1230 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1231 shortcuts to them in our hash table. */
1234 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1236 struct elf32_arm_link_hash_table *htab;
1238 htab = elf32_arm_hash_table (info);
1239 /* BPABI objects never have a GOT, or associated sections. */
1240 if (htab->symbian_p)
1243 if (! _bfd_elf_create_got_section (dynobj, info))
1246 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1247 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1248 if (!htab->sgot || !htab->sgotplt)
1251 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1252 if (htab->srelgot == NULL
1253 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1254 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1255 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1257 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1262 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1263 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1267 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1269 struct elf32_arm_link_hash_table *htab;
1271 htab = elf32_arm_hash_table (info);
1272 if (!htab->sgot && !create_got_section (dynobj, info))
1275 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1278 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1279 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1280 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1282 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1287 || (!info->shared && !htab->srelbss))
1293 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1296 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1297 struct elf_link_hash_entry *dir,
1298 struct elf_link_hash_entry *ind)
1300 struct elf32_arm_link_hash_entry *edir, *eind;
1302 edir = (struct elf32_arm_link_hash_entry *) dir;
1303 eind = (struct elf32_arm_link_hash_entry *) ind;
1305 if (eind->relocs_copied != NULL)
1307 if (edir->relocs_copied != NULL)
1309 struct elf32_arm_relocs_copied **pp;
1310 struct elf32_arm_relocs_copied *p;
1312 if (ind->root.type == bfd_link_hash_indirect)
1315 /* Add reloc counts against the weak sym to the strong sym
1316 list. Merge any entries against the same section. */
1317 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1319 struct elf32_arm_relocs_copied *q;
1321 for (q = edir->relocs_copied; q != NULL; q = q->next)
1322 if (q->section == p->section)
1324 q->count += p->count;
1331 *pp = edir->relocs_copied;
1334 edir->relocs_copied = eind->relocs_copied;
1335 eind->relocs_copied = NULL;
1338 /* If the direct symbol already has an associated PLT entry, the
1339 indirect symbol should not. If it doesn't, swap refcount information
1340 from the indirect symbol. */
1341 if (edir->plt_thumb_refcount == 0)
1343 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1344 eind->plt_thumb_refcount = 0;
1347 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1349 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1352 /* Create an ARM elf linker hash table. */
1354 static struct bfd_link_hash_table *
1355 elf32_arm_link_hash_table_create (bfd *abfd)
1357 struct elf32_arm_link_hash_table *ret;
1358 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1360 ret = bfd_malloc (amt);
1364 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1365 elf32_arm_link_hash_newfunc))
1372 ret->sgotplt = NULL;
1373 ret->srelgot = NULL;
1375 ret->srelplt = NULL;
1376 ret->sdynbss = NULL;
1377 ret->srelbss = NULL;
1378 ret->thumb_glue_size = 0;
1379 ret->arm_glue_size = 0;
1380 ret->bfd_of_glue_owner = NULL;
1381 ret->byteswap_code = 0;
1382 ret->target1_is_rel = 0;
1383 ret->target2_reloc = R_ARM_NONE;
1384 #ifdef FOUR_WORD_PLT
1385 ret->plt_header_size = 16;
1386 ret->plt_entry_size = 16;
1388 ret->plt_header_size = 20;
1389 ret->plt_entry_size = 12;
1393 ret->sym_sec.abfd = NULL;
1396 return &ret->root.root;
1399 /* Locate the Thumb encoded calling stub for NAME. */
1401 static struct elf_link_hash_entry *
1402 find_thumb_glue (struct bfd_link_info *link_info,
1407 struct elf_link_hash_entry *hash;
1408 struct elf32_arm_link_hash_table *hash_table;
1410 /* We need a pointer to the armelf specific hash table. */
1411 hash_table = elf32_arm_hash_table (link_info);
1413 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1414 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1416 BFD_ASSERT (tmp_name);
1418 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1420 hash = elf_link_hash_lookup
1421 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1424 /* xgettext:c-format */
1425 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1426 input_bfd, tmp_name, name);
1433 /* Locate the ARM encoded calling stub for NAME. */
1435 static struct elf_link_hash_entry *
1436 find_arm_glue (struct bfd_link_info *link_info,
1441 struct elf_link_hash_entry *myh;
1442 struct elf32_arm_link_hash_table *hash_table;
1444 /* We need a pointer to the elfarm specific hash table. */
1445 hash_table = elf32_arm_hash_table (link_info);
1447 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1448 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1450 BFD_ASSERT (tmp_name);
1452 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1454 myh = elf_link_hash_lookup
1455 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1458 /* xgettext:c-format */
1459 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1460 input_bfd, tmp_name, name);
1471 ldr r12, __func_addr
1474 .word func @ behave as if you saw a ARM_32 reloc. */
1476 #define ARM2THUMB_GLUE_SIZE 12
1477 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1478 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1479 static const insn32 a2t3_func_addr_insn = 0x00000001;
1481 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1485 __func_from_thumb: __func_from_thumb:
1487 nop ldr r6, __func_addr
1489 __func_change_to_arm: bx r6
1491 __func_back_to_thumb:
1497 #define THUMB2ARM_GLUE_SIZE 8
1498 static const insn16 t2a1_bx_pc_insn = 0x4778;
1499 static const insn16 t2a2_noop_insn = 0x46c0;
1500 static const insn32 t2a3_b_insn = 0xea000000;
1502 #ifndef ELFARM_NABI_C_INCLUDED
1504 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
1508 struct elf32_arm_link_hash_table * globals;
1510 globals = elf32_arm_hash_table (info);
1512 BFD_ASSERT (globals != NULL);
1514 if (globals->arm_glue_size != 0)
1516 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1518 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1519 ARM2THUMB_GLUE_SECTION_NAME);
1521 BFD_ASSERT (s != NULL);
1523 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
1525 s->size = globals->arm_glue_size;
1529 if (globals->thumb_glue_size != 0)
1531 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1533 s = bfd_get_section_by_name
1534 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1536 BFD_ASSERT (s != NULL);
1538 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
1540 s->size = globals->thumb_glue_size;
1548 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1549 struct elf_link_hash_entry * h)
1551 const char * name = h->root.root.string;
1554 struct elf_link_hash_entry * myh;
1555 struct bfd_link_hash_entry * bh;
1556 struct elf32_arm_link_hash_table * globals;
1559 globals = elf32_arm_hash_table (link_info);
1561 BFD_ASSERT (globals != NULL);
1562 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1564 s = bfd_get_section_by_name
1565 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1567 BFD_ASSERT (s != NULL);
1569 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1571 BFD_ASSERT (tmp_name);
1573 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1575 myh = elf_link_hash_lookup
1576 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
1580 /* We've already seen this guy. */
1585 /* The only trick here is using hash_table->arm_glue_size as the value.
1586 Even though the section isn't allocated yet, this is where we will be
1589 val = globals->arm_glue_size + 1;
1590 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1591 tmp_name, BSF_GLOBAL, s, val,
1592 NULL, TRUE, FALSE, &bh);
1594 myh = (struct elf_link_hash_entry *) bh;
1595 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1596 myh->forced_local = 1;
1600 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
1606 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1607 struct elf_link_hash_entry *h)
1609 const char *name = h->root.root.string;
1612 struct elf_link_hash_entry *myh;
1613 struct bfd_link_hash_entry *bh;
1614 struct elf32_arm_link_hash_table *hash_table;
1617 hash_table = elf32_arm_hash_table (link_info);
1619 BFD_ASSERT (hash_table != NULL);
1620 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1622 s = bfd_get_section_by_name
1623 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1625 BFD_ASSERT (s != NULL);
1627 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1628 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1630 BFD_ASSERT (tmp_name);
1632 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1634 myh = elf_link_hash_lookup
1635 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1639 /* We've already seen this guy. */
1645 val = hash_table->thumb_glue_size + 1;
1646 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1647 tmp_name, BSF_GLOBAL, s, val,
1648 NULL, TRUE, FALSE, &bh);
1650 /* If we mark it 'Thumb', the disassembler will do a better job. */
1651 myh = (struct elf_link_hash_entry *) bh;
1652 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
1653 myh->forced_local = 1;
1657 #define CHANGE_TO_ARM "__%s_change_to_arm"
1658 #define BACK_FROM_ARM "__%s_back_from_arm"
1660 /* Allocate another symbol to mark where we switch to Arm mode. */
1661 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1662 + strlen (CHANGE_TO_ARM) + 1);
1664 BFD_ASSERT (tmp_name);
1666 sprintf (tmp_name, CHANGE_TO_ARM, name);
1669 val = hash_table->thumb_glue_size + 4,
1670 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1671 tmp_name, BSF_LOCAL, s, val,
1672 NULL, TRUE, FALSE, &bh);
1676 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1681 /* Add the glue sections to ABFD. This function is called from the
1682 linker scripts in ld/emultempl/{armelf}.em. */
1685 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1686 struct bfd_link_info *info)
1691 /* If we are only performing a partial
1692 link do not bother adding the glue. */
1693 if (info->relocatable)
1696 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1700 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1701 will prevent elf_link_input_bfd() from processing the contents
1703 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
1705 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1708 || !bfd_set_section_flags (abfd, sec, flags)
1709 || !bfd_set_section_alignment (abfd, sec, 2))
1712 /* Set the gc mark to prevent the section from being removed by garbage
1713 collection, despite the fact that no relocs refer to this section. */
1717 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1721 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1722 | SEC_CODE | SEC_READONLY;
1724 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1727 || !bfd_set_section_flags (abfd, sec, flags)
1728 || !bfd_set_section_alignment (abfd, sec, 2))
1737 /* Select a BFD to be used to hold the sections used by the glue code.
1738 This function is called from the linker scripts in ld/emultempl/
1742 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
1744 struct elf32_arm_link_hash_table *globals;
1746 /* If we are only performing a partial link
1747 do not bother getting a bfd to hold the glue. */
1748 if (info->relocatable)
1751 /* Make sure we don't attach the glue sections to a dynamic object. */
1752 BFD_ASSERT (!(abfd->flags & DYNAMIC));
1754 globals = elf32_arm_hash_table (info);
1756 BFD_ASSERT (globals != NULL);
1758 if (globals->bfd_of_glue_owner != NULL)
1761 /* Save the bfd for later use. */
1762 globals->bfd_of_glue_owner = abfd;
1768 bfd_elf32_arm_process_before_allocation (bfd *abfd,
1769 struct bfd_link_info *link_info,
1772 Elf_Internal_Shdr *symtab_hdr;
1773 Elf_Internal_Rela *internal_relocs = NULL;
1774 Elf_Internal_Rela *irel, *irelend;
1775 bfd_byte *contents = NULL;
1778 struct elf32_arm_link_hash_table *globals;
1780 /* If we are only performing a partial link do not bother
1781 to construct any glue. */
1782 if (link_info->relocatable)
1785 /* Here we have a bfd that is to be included on the link. We have a hook
1786 to do reloc rummaging, before section sizes are nailed down. */
1787 globals = elf32_arm_hash_table (link_info);
1789 BFD_ASSERT (globals != NULL);
1790 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1792 if (byteswap_code && !bfd_big_endian (abfd))
1794 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1798 globals->byteswap_code = byteswap_code;
1800 /* Rummage around all the relocs and map the glue vectors. */
1801 sec = abfd->sections;
1806 for (; sec != NULL; sec = sec->next)
1808 if (sec->reloc_count == 0)
1811 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1813 /* Load the relocs. */
1815 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
1816 (Elf_Internal_Rela *) NULL, FALSE);
1818 if (internal_relocs == NULL)
1821 irelend = internal_relocs + sec->reloc_count;
1822 for (irel = internal_relocs; irel < irelend; irel++)
1825 unsigned long r_index;
1827 struct elf_link_hash_entry *h;
1829 r_type = ELF32_R_TYPE (irel->r_info);
1830 r_index = ELF32_R_SYM (irel->r_info);
1832 /* These are the only relocation types we care about. */
1833 if ( r_type != R_ARM_PC24
1834 && r_type != R_ARM_PLT32
1836 && r_type != R_ARM_CALL
1837 && r_type != R_ARM_JUMP24
1839 && r_type != R_ARM_THM_PC22)
1842 /* Get the section contents if we haven't done so already. */
1843 if (contents == NULL)
1845 /* Get cached copy if it exists. */
1846 if (elf_section_data (sec)->this_hdr.contents != NULL)
1847 contents = elf_section_data (sec)->this_hdr.contents;
1850 /* Go get them off disk. */
1851 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
1856 /* If the relocation is not against a symbol it cannot concern us. */
1859 /* We don't care about local symbols. */
1860 if (r_index < symtab_hdr->sh_info)
1863 /* This is an external symbol. */
1864 r_index -= symtab_hdr->sh_info;
1865 h = (struct elf_link_hash_entry *)
1866 elf_sym_hashes (abfd)[r_index];
1868 /* If the relocation is against a static symbol it must be within
1869 the current section and so cannot be a cross ARM/Thumb relocation. */
1873 /* If the call will go through a PLT entry then we do not need
1875 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
1885 /* This one is a call from arm code. We need to look up
1886 the target of the call. If it is a thumb target, we
1888 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
1889 record_arm_to_thumb_glue (link_info, h);
1892 case R_ARM_THM_PC22:
1893 /* This one is a call from thumb code. We look
1894 up the target of the call. If it is not a thumb
1895 target, we insert glue. */
1896 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
1897 record_thumb_to_arm_glue (link_info, h);
1905 if (contents != NULL
1906 && elf_section_data (sec)->this_hdr.contents != contents)
1910 if (internal_relocs != NULL
1911 && elf_section_data (sec)->relocs != internal_relocs)
1912 free (internal_relocs);
1913 internal_relocs = NULL;
1919 if (contents != NULL
1920 && elf_section_data (sec)->this_hdr.contents != contents)
1922 if (internal_relocs != NULL
1923 && elf_section_data (sec)->relocs != internal_relocs)
1924 free (internal_relocs);
1932 /* Set target relocation values needed during linking. */
1935 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
1937 char * target2_type,
1940 struct elf32_arm_link_hash_table *globals;
1942 globals = elf32_arm_hash_table (link_info);
1944 globals->target1_is_rel = target1_is_rel;
1945 if (strcmp (target2_type, "rel") == 0)
1946 globals->target2_reloc = R_ARM_REL32;
1947 else if (strcmp (target2_type, "abs") == 0)
1948 globals->target2_reloc = R_ARM_ABS32;
1949 else if (strcmp (target2_type, "got-rel") == 0)
1950 globals->target2_reloc = R_ARM_GOT_PREL;
1953 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
1956 globals->fix_v4bx = fix_v4bx;
1960 /* The thumb form of a long branch is a bit finicky, because the offset
1961 encoding is split over two fields, each in it's own instruction. They
1962 can occur in any order. So given a thumb form of long branch, and an
1963 offset, insert the offset into the thumb branch and return finished
1966 It takes two thumb instructions to encode the target address. Each has
1967 11 bits to invest. The upper 11 bits are stored in one (identified by
1968 H-0.. see below), the lower 11 bits are stored in the other (identified
1971 Combine together and shifted left by 1 (it's a half word address) and
1975 H-0, upper address-0 = 000
1977 H-1, lower address-0 = 800
1979 They can be ordered either way, but the arm tools I've seen always put
1980 the lower one first. It probably doesn't matter. krk@cygnus.com
1982 XXX: Actually the order does matter. The second instruction (H-1)
1983 moves the computed address into the PC, so it must be the second one
1984 in the sequence. The problem, however is that whilst little endian code
1985 stores the instructions in HI then LOW order, big endian code does the
1986 reverse. nickc@cygnus.com. */
1988 #define LOW_HI_ORDER 0xF800F000
1989 #define HI_LOW_ORDER 0xF000F800
1992 insert_thumb_branch (insn32 br_insn, int rel_off)
1994 unsigned int low_bits;
1995 unsigned int high_bits;
1997 BFD_ASSERT ((rel_off & 1) != 1);
1999 rel_off >>= 1; /* Half word aligned address. */
2000 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2001 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2003 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2004 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2005 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2006 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2008 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2009 abort (); /* Error - not a valid branch instruction form. */
2014 /* Thumb code calling an ARM function. */
2017 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2021 asection * input_section,
2022 bfd_byte * hit_data,
2025 bfd_signed_vma addend,
2030 unsigned long int tmp;
2031 long int ret_offset;
2032 struct elf_link_hash_entry * myh;
2033 struct elf32_arm_link_hash_table * globals;
2035 myh = find_thumb_glue (info, name, input_bfd);
2039 globals = elf32_arm_hash_table (info);
2041 BFD_ASSERT (globals != NULL);
2042 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2044 my_offset = myh->root.u.def.value;
2046 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2047 THUMB2ARM_GLUE_SECTION_NAME);
2049 BFD_ASSERT (s != NULL);
2050 BFD_ASSERT (s->contents != NULL);
2051 BFD_ASSERT (s->output_section != NULL);
2053 if ((my_offset & 0x01) == 0x01)
2056 && sym_sec->owner != NULL
2057 && !INTERWORK_FLAG (sym_sec->owner))
2059 (*_bfd_error_handler)
2060 (_("%B(%s): warning: interworking not enabled.\n"
2061 " first occurrence: %B: thumb call to arm"),
2062 sym_sec->owner, input_bfd, name);
2068 myh->root.u.def.value = my_offset;
2070 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2071 s->contents + my_offset);
2073 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2074 s->contents + my_offset + 2);
2077 /* Address of destination of the stub. */
2078 ((bfd_signed_vma) val)
2080 /* Offset from the start of the current section
2081 to the start of the stubs. */
2083 /* Offset of the start of this stub from the start of the stubs. */
2085 /* Address of the start of the current section. */
2086 + s->output_section->vma)
2087 /* The branch instruction is 4 bytes into the stub. */
2089 /* ARM branches work from the pc of the instruction + 8. */
2092 bfd_put_32 (output_bfd,
2093 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2094 s->contents + my_offset + 4);
2097 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2099 /* Now go back and fix up the original BL insn to point to here. */
2101 /* Address of where the stub is located. */
2102 (s->output_section->vma + s->output_offset + my_offset)
2103 /* Address of where the BL is located. */
2104 - (input_section->output_section->vma + input_section->output_offset
2106 /* Addend in the relocation. */
2108 /* Biassing for PC-relative addressing. */
2111 tmp = bfd_get_32 (input_bfd, hit_data
2112 - input_section->vma);
2114 bfd_put_32 (output_bfd,
2115 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2116 hit_data - input_section->vma);
2121 /* Arm code calling a Thumb function. */
2124 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2128 asection * input_section,
2129 bfd_byte * hit_data,
2132 bfd_signed_vma addend,
2135 unsigned long int tmp;
2138 long int ret_offset;
2139 struct elf_link_hash_entry * myh;
2140 struct elf32_arm_link_hash_table * globals;
2142 myh = find_arm_glue (info, name, input_bfd);
2146 globals = elf32_arm_hash_table (info);
2148 BFD_ASSERT (globals != NULL);
2149 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2151 my_offset = myh->root.u.def.value;
2152 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2153 ARM2THUMB_GLUE_SECTION_NAME);
2154 BFD_ASSERT (s != NULL);
2155 BFD_ASSERT (s->contents != NULL);
2156 BFD_ASSERT (s->output_section != NULL);
2158 if ((my_offset & 0x01) == 0x01)
2161 && sym_sec->owner != NULL
2162 && !INTERWORK_FLAG (sym_sec->owner))
2164 (*_bfd_error_handler)
2165 (_("%B(%s): warning: interworking not enabled.\n"
2166 " first occurrence: %B: arm call to thumb"),
2167 sym_sec->owner, input_bfd, name);
2171 myh->root.u.def.value = my_offset;
2173 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2174 s->contents + my_offset);
2176 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2177 s->contents + my_offset + 4);
2179 /* It's a thumb address. Add the low order bit. */
2180 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2181 s->contents + my_offset + 8);
2184 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2186 tmp = bfd_get_32 (input_bfd, hit_data);
2187 tmp = tmp & 0xFF000000;
2189 /* Somehow these are both 4 too far, so subtract 8. */
2190 ret_offset = (s->output_offset
2192 + s->output_section->vma
2193 - (input_section->output_offset
2194 + input_section->output_section->vma
2198 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2200 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2207 /* Some relocations map to different relocations depending on the
2208 target. Return the real relocation. */
2210 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2216 if (globals->target1_is_rel)
2222 return globals->target2_reloc;
2228 #endif /* OLD_ARM_ABI */
2231 /* Perform a relocation as part of a final link. */
2233 static bfd_reloc_status_type
2234 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2237 asection * input_section,
2238 bfd_byte * contents,
2239 Elf_Internal_Rela * rel,
2241 struct bfd_link_info * info,
2243 const char * sym_name,
2245 struct elf_link_hash_entry * h)
2247 unsigned long r_type = howto->type;
2248 unsigned long r_symndx;
2249 bfd_byte * hit_data = contents + rel->r_offset;
2250 bfd * dynobj = NULL;
2251 Elf_Internal_Shdr * symtab_hdr;
2252 struct elf_link_hash_entry ** sym_hashes;
2253 bfd_vma * local_got_offsets;
2254 asection * sgot = NULL;
2255 asection * splt = NULL;
2256 asection * sreloc = NULL;
2258 bfd_signed_vma signed_addend;
2259 struct elf32_arm_link_hash_table * globals;
2261 globals = elf32_arm_hash_table (info);
2264 /* Some relocation type map to different relocations depending on the
2265 target. We pick the right one here. */
2266 r_type = arm_real_reloc_type (globals, r_type);
2267 if (r_type != howto->type)
2268 howto = elf32_arm_howto_from_type (r_type);
2269 #endif /* OLD_ARM_ABI */
2271 /* If the start address has been set, then set the EF_ARM_HASENTRY
2272 flag. Setting this more than once is redundant, but the cost is
2273 not too high, and it keeps the code simple.
2275 The test is done here, rather than somewhere else, because the
2276 start address is only set just before the final link commences.
2278 Note - if the user deliberately sets a start address of 0, the
2279 flag will not be set. */
2280 if (bfd_get_start_address (output_bfd) != 0)
2281 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2283 dynobj = elf_hash_table (info)->dynobj;
2286 sgot = bfd_get_section_by_name (dynobj, ".got");
2287 splt = bfd_get_section_by_name (dynobj, ".plt");
2289 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2290 sym_hashes = elf_sym_hashes (input_bfd);
2291 local_got_offsets = elf_local_got_offsets (input_bfd);
2292 r_symndx = ELF32_R_SYM (rel->r_info);
2294 if (globals->use_rel)
2296 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2298 if (addend & ((howto->src_mask + 1) >> 1))
2301 signed_addend &= ~ howto->src_mask;
2302 signed_addend |= addend;
2305 signed_addend = addend;
2308 addend = signed_addend = rel->r_addend;
2313 return bfd_reloc_ok;
2325 /* r_symndx will be zero only for relocs against symbols
2326 from removed linkonce sections, or sections discarded by
2329 return bfd_reloc_ok;
2331 /* Handle relocations which should use the PLT entry. ABS32/REL32
2332 will use the symbol's value, which may point to a PLT entry, but we
2333 don't need to handle that here. If we created a PLT entry, all
2334 branches in this object should go to it. */
2335 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2338 && h->plt.offset != (bfd_vma) -1)
2340 /* If we've created a .plt section, and assigned a PLT entry to
2341 this function, it should not be known to bind locally. If
2342 it were, we would have cleared the PLT entry. */
2343 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2345 value = (splt->output_section->vma
2346 + splt->output_offset
2348 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2349 contents, rel->r_offset, value,
2353 /* When generating a shared object or relocatable executable, these
2354 relocations are copied into the output file to be resolved at
2356 if ((info->shared || globals->root.is_relocatable_executable)
2357 && (input_section->flags & SEC_ALLOC)
2358 && (r_type != R_ARM_REL32
2359 || !SYMBOL_CALLS_LOCAL (info, h))
2361 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2362 || h->root.type != bfd_link_hash_undefweak)
2363 && r_type != R_ARM_PC24
2365 && r_type != R_ARM_CALL
2366 && r_type != R_ARM_JUMP24
2367 && r_type != R_ARM_PREL31
2369 && r_type != R_ARM_PLT32)
2371 Elf_Internal_Rela outrel;
2373 bfd_boolean skip, relocate;
2379 name = (bfd_elf_string_from_elf_section
2381 elf_elfheader (input_bfd)->e_shstrndx,
2382 elf_section_data (input_section)->rel_hdr.sh_name));
2384 return bfd_reloc_notsupported;
2386 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2387 && strcmp (bfd_get_section_name (input_bfd,
2391 sreloc = bfd_get_section_by_name (dynobj, name);
2392 BFD_ASSERT (sreloc != NULL);
2399 _bfd_elf_section_offset (output_bfd, info, input_section,
2401 if (outrel.r_offset == (bfd_vma) -1)
2403 else if (outrel.r_offset == (bfd_vma) -2)
2404 skip = TRUE, relocate = TRUE;
2405 outrel.r_offset += (input_section->output_section->vma
2406 + input_section->output_offset);
2409 memset (&outrel, 0, sizeof outrel);
2414 || !h->def_regular))
2415 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2420 /* This symbol is local, or marked to become local. */
2422 if (sym_flags == STT_ARM_TFUNC)
2424 if (globals->symbian_p)
2426 /* On Symbian OS, the data segment and text segement
2427 can be relocated independently. Therefore, we
2428 must indicate the segment to which this
2429 relocation is relative. The BPABI allows us to
2430 use any symbol in the right segment; we just use
2431 the section symbol as it is convenient. (We
2432 cannot use the symbol given by "h" directly as it
2433 will not appear in the dynamic symbol table.) */
2434 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2435 BFD_ASSERT (symbol != 0);
2438 /* On SVR4-ish systems, the dynamic loader cannot
2439 relocate the text and data segments independently,
2440 so the symbol does not matter. */
2442 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2445 loc = sreloc->contents;
2446 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2447 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2449 /* If this reloc is against an external symbol, we do not want to
2450 fiddle with the addend. Otherwise, we need to include the symbol
2451 value so that it becomes an addend for the dynamic reloc. */
2453 return bfd_reloc_ok;
2455 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2456 contents, rel->r_offset, value,
2459 else switch (r_type)
2462 case R_ARM_XPC25: /* Arm BLX instruction. */
2466 case R_ARM_PC24: /* Arm B/BL instruction */
2469 if (r_type == R_ARM_XPC25)
2471 /* Check for Arm calling Arm function. */
2472 /* FIXME: Should we translate the instruction into a BL
2473 instruction instead ? */
2474 if (sym_flags != STT_ARM_TFUNC)
2475 (*_bfd_error_handler)
2476 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2478 h ? h->root.root.string : "(local)");
2483 /* Check for Arm calling Thumb function. */
2484 if (sym_flags == STT_ARM_TFUNC)
2486 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2487 output_bfd, input_section,
2488 hit_data, sym_sec, rel->r_offset,
2489 signed_addend, value);
2490 return bfd_reloc_ok;
2494 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2496 S is the address of the symbol in the relocation.
2497 P is address of the instruction being relocated.
2498 A is the addend (extracted from the instruction) in bytes.
2500 S is held in 'value'.
2501 P is the base address of the section containing the
2502 instruction plus the offset of the reloc into that
2504 (input_section->output_section->vma +
2505 input_section->output_offset +
2507 A is the addend, converted into bytes, ie:
2510 Note: None of these operations have knowledge of the pipeline
2511 size of the processor, thus it is up to the assembler to
2512 encode this information into the addend. */
2513 value -= (input_section->output_section->vma
2514 + input_section->output_offset);
2515 value -= rel->r_offset;
2516 if (globals->use_rel)
2517 value += (signed_addend << howto->size);
2519 /* RELA addends do not have to be adjusted by howto->size. */
2520 value += signed_addend;
2522 signed_addend = value;
2523 signed_addend >>= howto->rightshift;
2525 /* It is not an error for an undefined weak reference to be
2526 out of range. Any program that branches to such a symbol
2527 is going to crash anyway, so there is no point worrying
2528 about getting the destination exactly right. */
2529 if (! h || h->root.type != bfd_link_hash_undefweak)
2531 /* Perform a signed range check. */
2532 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2533 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2534 return bfd_reloc_overflow;
2538 /* If necessary set the H bit in the BLX instruction. */
2539 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2540 value = (signed_addend & howto->dst_mask)
2541 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2545 value = (signed_addend & howto->dst_mask)
2546 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2551 if (sym_flags == STT_ARM_TFUNC)
2556 value -= (input_section->output_section->vma
2557 + input_section->output_offset + rel->r_offset);
2563 value -= (input_section->output_section->vma
2564 + input_section->output_offset + rel->r_offset);
2565 value += signed_addend;
2566 if (! h || h->root.type != bfd_link_hash_undefweak)
2568 /* Check for overflow */
2569 if ((value ^ (value >> 1)) & (1 << 30))
2570 return bfd_reloc_overflow;
2572 value &= 0x7fffffff;
2573 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2574 if (sym_flags == STT_ARM_TFUNC)
2580 bfd_put_32 (input_bfd, value, hit_data);
2581 return bfd_reloc_ok;
2585 if ((long) value > 0x7f || (long) value < -0x80)
2586 return bfd_reloc_overflow;
2588 bfd_put_8 (input_bfd, value, hit_data);
2589 return bfd_reloc_ok;
2594 if ((long) value > 0x7fff || (long) value < -0x8000)
2595 return bfd_reloc_overflow;
2597 bfd_put_16 (input_bfd, value, hit_data);
2598 return bfd_reloc_ok;
2601 /* Support ldr and str instruction for the arm */
2602 /* Also thumb b (unconditional branch). ??? Really? */
2605 if ((long) value > 0x7ff || (long) value < -0x800)
2606 return bfd_reloc_overflow;
2608 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2609 bfd_put_32 (input_bfd, value, hit_data);
2610 return bfd_reloc_ok;
2612 case R_ARM_THM_ABS5:
2613 /* Support ldr and str instructions for the thumb. */
2614 if (globals->use_rel)
2616 /* Need to refetch addend. */
2617 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2618 /* ??? Need to determine shift amount from operand size. */
2619 addend >>= howto->rightshift;
2623 /* ??? Isn't value unsigned? */
2624 if ((long) value > 0x1f || (long) value < -0x10)
2625 return bfd_reloc_overflow;
2627 /* ??? Value needs to be properly shifted into place first. */
2628 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2629 bfd_put_16 (input_bfd, value, hit_data);
2630 return bfd_reloc_ok;
2633 case R_ARM_THM_XPC22:
2635 case R_ARM_THM_PC22:
2636 /* Thumb BL (branch long instruction). */
2639 bfd_boolean overflow = FALSE;
2640 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2641 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2642 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2643 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2645 bfd_signed_vma signed_check;
2647 /* Need to refetch the addend and squish the two 11 bit pieces
2649 if (globals->use_rel)
2651 bfd_vma upper = upper_insn & 0x7ff;
2652 bfd_vma lower = lower_insn & 0x7ff;
2653 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2654 addend = (upper << 12) | (lower << 1);
2655 signed_addend = addend;
2658 if (r_type == R_ARM_THM_XPC22)
2660 /* Check for Thumb to Thumb call. */
2661 /* FIXME: Should we translate the instruction into a BL
2662 instruction instead ? */
2663 if (sym_flags == STT_ARM_TFUNC)
2664 (*_bfd_error_handler)
2665 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2667 h ? h->root.root.string : "(local)");
2672 /* If it is not a call to Thumb, assume call to Arm.
2673 If it is a call relative to a section name, then it is not a
2674 function call at all, but rather a long jump. Calls through
2675 the PLT do not require stubs. */
2676 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2677 && (h == NULL || splt == NULL
2678 || h->plt.offset == (bfd_vma) -1))
2680 if (elf32_thumb_to_arm_stub
2681 (info, sym_name, input_bfd, output_bfd, input_section,
2682 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2683 return bfd_reloc_ok;
2685 return bfd_reloc_dangerous;
2689 /* Handle calls via the PLT. */
2690 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2692 value = (splt->output_section->vma
2693 + splt->output_offset
2695 /* Target the Thumb stub before the ARM PLT entry. */
2699 relocation = value + signed_addend;
2701 relocation -= (input_section->output_section->vma
2702 + input_section->output_offset
2705 check = relocation >> howto->rightshift;
2707 /* If this is a signed value, the rightshift just dropped
2708 leading 1 bits (assuming twos complement). */
2709 if ((bfd_signed_vma) relocation >= 0)
2710 signed_check = check;
2712 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2714 /* Assumes two's complement. */
2715 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2719 if (r_type == R_ARM_THM_XPC22
2720 && ((lower_insn & 0x1800) == 0x0800))
2721 /* For a BLX instruction, make sure that the relocation is rounded up
2722 to a word boundary. This follows the semantics of the instruction
2723 which specifies that bit 1 of the target address will come from bit
2724 1 of the base address. */
2725 relocation = (relocation + 2) & ~ 3;
2727 /* Put RELOCATION back into the insn. */
2728 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
2729 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
2731 /* Put the relocated value back in the object file: */
2732 bfd_put_16 (input_bfd, upper_insn, hit_data);
2733 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
2735 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
2739 case R_ARM_THM_PC11:
2741 /* Thumb B (branch) instruction). */
2743 bfd_signed_vma relocation;
2744 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
2745 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2746 bfd_signed_vma signed_check;
2748 if (globals->use_rel)
2750 /* Need to refetch addend. */
2751 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2752 if (addend & ((howto->src_mask + 1) >> 1))
2755 signed_addend &= ~ howto->src_mask;
2756 signed_addend |= addend;
2759 signed_addend = addend;
2760 /* The value in the insn has been right shifted. We need to
2761 undo this, so that we can perform the address calculation
2762 in terms of bytes. */
2763 signed_addend <<= howto->rightshift;
2765 relocation = value + signed_addend;
2767 relocation -= (input_section->output_section->vma
2768 + input_section->output_offset
2771 relocation >>= howto->rightshift;
2772 signed_check = relocation;
2773 relocation &= howto->dst_mask;
2774 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
2776 bfd_put_16 (input_bfd, relocation, hit_data);
2778 /* Assumes two's complement. */
2779 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2780 return bfd_reloc_overflow;
2782 return bfd_reloc_ok;
2786 case R_ARM_ALU_PCREL7_0:
2787 case R_ARM_ALU_PCREL15_8:
2788 case R_ARM_ALU_PCREL23_15:
2793 insn = bfd_get_32 (input_bfd, hit_data);
2794 if (globals->use_rel)
2796 /* Extract the addend. */
2797 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
2798 signed_addend = addend;
2800 relocation = value + signed_addend;
2802 relocation -= (input_section->output_section->vma
2803 + input_section->output_offset
2805 insn = (insn & ~0xfff)
2806 | ((howto->bitpos << 7) & 0xf00)
2807 | ((relocation >> howto->bitpos) & 0xff);
2808 bfd_put_32 (input_bfd, value, hit_data);
2810 return bfd_reloc_ok;
2813 case R_ARM_GNU_VTINHERIT:
2814 case R_ARM_GNU_VTENTRY:
2815 return bfd_reloc_ok;
2818 return bfd_reloc_notsupported;
2820 case R_ARM_GLOB_DAT:
2821 return bfd_reloc_notsupported;
2823 case R_ARM_JUMP_SLOT:
2824 return bfd_reloc_notsupported;
2826 case R_ARM_RELATIVE:
2827 return bfd_reloc_notsupported;
2830 /* Relocation is relative to the start of the
2831 global offset table. */
2833 BFD_ASSERT (sgot != NULL);
2835 return bfd_reloc_notsupported;
2837 /* If we are addressing a Thumb function, we need to adjust the
2838 address by one, so that attempts to call the function pointer will
2839 correctly interpret it as Thumb code. */
2840 if (sym_flags == STT_ARM_TFUNC)
2843 /* Note that sgot->output_offset is not involved in this
2844 calculation. We always want the start of .got. If we
2845 define _GLOBAL_OFFSET_TABLE in a different way, as is
2846 permitted by the ABI, we might have to change this
2848 value -= sgot->output_section->vma;
2849 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2850 contents, rel->r_offset, value,
2854 /* Use global offset table as symbol value. */
2855 BFD_ASSERT (sgot != NULL);
2858 return bfd_reloc_notsupported;
2860 value = sgot->output_section->vma;
2861 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2862 contents, rel->r_offset, value,
2867 case R_ARM_GOT_PREL:
2869 /* Relocation is to the entry for this symbol in the
2870 global offset table. */
2872 return bfd_reloc_notsupported;
2879 off = h->got.offset;
2880 BFD_ASSERT (off != (bfd_vma) -1);
2881 dyn = globals->root.dynamic_sections_created;
2883 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2885 && SYMBOL_REFERENCES_LOCAL (info, h))
2886 || (ELF_ST_VISIBILITY (h->other)
2887 && h->root.type == bfd_link_hash_undefweak))
2889 /* This is actually a static link, or it is a -Bsymbolic link
2890 and the symbol is defined locally. We must initialize this
2891 entry in the global offset table. Since the offset must
2892 always be a multiple of 4, we use the least significant bit
2893 to record whether we have initialized it already.
2895 When doing a dynamic link, we create a .rel.got relocation
2896 entry to initialize the value. This is done in the
2897 finish_dynamic_symbol routine. */
2902 /* If we are addressing a Thumb function, we need to
2903 adjust the address by one, so that attempts to
2904 call the function pointer will correctly
2905 interpret it as Thumb code. */
2906 if (sym_flags == STT_ARM_TFUNC)
2909 bfd_put_32 (output_bfd, value, sgot->contents + off);
2914 value = sgot->output_offset + off;
2920 BFD_ASSERT (local_got_offsets != NULL &&
2921 local_got_offsets[r_symndx] != (bfd_vma) -1);
2923 off = local_got_offsets[r_symndx];
2925 /* The offset must always be a multiple of 4. We use the
2926 least significant bit to record whether we have already
2927 generated the necessary reloc. */
2932 /* If we are addressing a Thumb function, we need to
2933 adjust the address by one, so that attempts to
2934 call the function pointer will correctly
2935 interpret it as Thumb code. */
2936 if (sym_flags == STT_ARM_TFUNC)
2939 bfd_put_32 (output_bfd, value, sgot->contents + off);
2944 Elf_Internal_Rela outrel;
2947 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2948 BFD_ASSERT (srelgot != NULL);
2950 outrel.r_offset = (sgot->output_section->vma
2951 + sgot->output_offset
2953 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2954 loc = srelgot->contents;
2955 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2956 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2959 local_got_offsets[r_symndx] |= 1;
2962 value = sgot->output_offset + off;
2964 if (r_type != R_ARM_GOT32)
2965 value += sgot->output_section->vma;
2967 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2968 contents, rel->r_offset, value,
2972 return bfd_reloc_notsupported;
2974 case R_ARM_AMP_VCALL9:
2975 return bfd_reloc_notsupported;
2977 case R_ARM_RSBREL32:
2978 return bfd_reloc_notsupported;
2980 case R_ARM_THM_RPC22:
2981 return bfd_reloc_notsupported;
2984 return bfd_reloc_notsupported;
2987 return bfd_reloc_notsupported;
2990 return bfd_reloc_notsupported;
2993 return bfd_reloc_notsupported;
2996 if (globals->fix_v4bx)
2998 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
3000 /* Ensure that we have a BX instruction. */
3001 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3003 /* Preserve Rm (lowest four bits) and the condition code
3004 (highest four bits). Other bits encode MOV PC,Rm. */
3005 insn = (insn & 0xf000000f) | 0x01a0f000;
3007 bfd_put_32 (input_bfd, insn, hit_data);
3009 return bfd_reloc_ok;
3012 return bfd_reloc_notsupported;
3016 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3018 arm_add_to_rel (bfd * abfd,
3020 reloc_howto_type * howto,
3021 bfd_signed_vma increment)
3023 bfd_signed_vma addend;
3025 if (howto->type == R_ARM_THM_PC22)
3027 int upper_insn, lower_insn;
3030 upper_insn = bfd_get_16 (abfd, address);
3031 lower_insn = bfd_get_16 (abfd, address + 2);
3032 upper = upper_insn & 0x7ff;
3033 lower = lower_insn & 0x7ff;
3035 addend = (upper << 12) | (lower << 1);
3036 addend += increment;
3039 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3040 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3042 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3043 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3049 contents = bfd_get_32 (abfd, address);
3051 /* Get the (signed) value from the instruction. */
3052 addend = contents & howto->src_mask;
3053 if (addend & ((howto->src_mask + 1) >> 1))
3055 bfd_signed_vma mask;
3058 mask &= ~ howto->src_mask;
3062 /* Add in the increment, (which is a byte value). */
3063 switch (howto->type)
3066 addend += increment;
3074 addend <<= howto->size;
3075 addend += increment;
3077 /* Should we check for overflow here ? */
3079 /* Drop any undesired bits. */
3080 addend >>= howto->rightshift;
3084 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3086 bfd_put_32 (abfd, contents, address);
3090 /* Relocate an ARM ELF section. */
3092 elf32_arm_relocate_section (bfd * output_bfd,
3093 struct bfd_link_info * info,
3095 asection * input_section,
3096 bfd_byte * contents,
3097 Elf_Internal_Rela * relocs,
3098 Elf_Internal_Sym * local_syms,
3099 asection ** local_sections)
3101 Elf_Internal_Shdr *symtab_hdr;
3102 struct elf_link_hash_entry **sym_hashes;
3103 Elf_Internal_Rela *rel;
3104 Elf_Internal_Rela *relend;
3106 struct elf32_arm_link_hash_table * globals;
3108 globals = elf32_arm_hash_table (info);
3109 if (info->relocatable && !globals->use_rel)
3112 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3113 sym_hashes = elf_sym_hashes (input_bfd);
3116 relend = relocs + input_section->reloc_count;
3117 for (; rel < relend; rel++)
3120 reloc_howto_type * howto;
3121 unsigned long r_symndx;
3122 Elf_Internal_Sym * sym;
3124 struct elf_link_hash_entry * h;
3126 bfd_reloc_status_type r;
3129 r_symndx = ELF32_R_SYM (rel->r_info);
3130 r_type = ELF32_R_TYPE (rel->r_info);
3131 r_type = arm_real_reloc_type (globals, r_type);
3133 if ( r_type == R_ARM_GNU_VTENTRY
3134 || r_type == R_ARM_GNU_VTINHERIT)
3137 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3138 howto = bfd_reloc.howto;
3140 if (info->relocatable && globals->use_rel)
3142 /* This is a relocatable link. We don't have to change
3143 anything, unless the reloc is against a section symbol,
3144 in which case we have to adjust according to where the
3145 section symbol winds up in the output section. */
3146 if (r_symndx < symtab_hdr->sh_info)
3148 sym = local_syms + r_symndx;
3149 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3151 sec = local_sections[r_symndx];
3152 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3154 (bfd_signed_vma) (sec->output_offset
3162 /* This is a final link. */
3167 if (r_symndx < symtab_hdr->sh_info)
3169 sym = local_syms + r_symndx;
3170 sec = local_sections[r_symndx];
3171 if (globals->use_rel)
3173 relocation = (sec->output_section->vma
3174 + sec->output_offset
3176 if ((sec->flags & SEC_MERGE)
3177 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3180 bfd_vma addend, value;
3182 if (howto->rightshift)
3184 (*_bfd_error_handler)
3185 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3186 input_bfd, input_section,
3187 (long) rel->r_offset, howto->name);
3191 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3193 /* Get the (signed) value from the instruction. */
3194 addend = value & howto->src_mask;
3195 if (addend & ((howto->src_mask + 1) >> 1))
3197 bfd_signed_vma mask;
3200 mask &= ~ howto->src_mask;
3205 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3207 addend += msec->output_section->vma + msec->output_offset;
3208 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3209 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3213 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3218 bfd_boolean unresolved_reloc;
3220 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3221 r_symndx, symtab_hdr, sym_hashes,
3223 unresolved_reloc, warned);
3225 if (unresolved_reloc || relocation != 0)
3227 /* In these cases, we don't need the relocation value.
3228 We check specially because in some obscure cases
3229 sec->output_section will be NULL. */
3239 case R_ARM_THM_PC22:
3243 && ((!info->symbolic && h->dynindx != -1)
3245 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3246 && ((input_section->flags & SEC_ALLOC) != 0
3247 /* DWARF will emit R_ARM_ABS32 relocations in its
3248 sections against symbols defined externally
3249 in shared libraries. We can't do anything
3251 || ((input_section->flags & SEC_DEBUGGING) != 0
3263 case R_ARM_GOT_PREL:
3265 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
3266 (elf_hash_table (info)->dynamic_sections_created,
3269 || (!info->symbolic && h->dynindx != -1)
3270 || !h->def_regular))
3275 if (unresolved_reloc)
3277 (_("%B(%A): warning: unresolvable relocation %d against symbol `%s'"),
3278 input_bfd, input_section,
3280 h->root.root.string);
3287 name = h->root.root.string;
3290 name = (bfd_elf_string_from_elf_section
3291 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3292 if (name == NULL || *name == '\0')
3293 name = bfd_section_name (input_bfd, sec);
3296 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3297 input_section, contents, rel,
3298 relocation, info, sec, name,
3299 (h ? ELF_ST_TYPE (h->type) :
3300 ELF_ST_TYPE (sym->st_info)), h);
3302 if (r != bfd_reloc_ok)
3304 const char * msg = (const char *) 0;
3308 case bfd_reloc_overflow:
3309 /* If the overflowing reloc was to an undefined symbol,
3310 we have already printed one error message and there
3311 is no point complaining again. */
3313 h->root.type != bfd_link_hash_undefined)
3314 && (!((*info->callbacks->reloc_overflow)
3315 (info, (h ? &h->root : NULL), name, howto->name,
3316 (bfd_vma) 0, input_bfd, input_section,
3321 case bfd_reloc_undefined:
3322 if (!((*info->callbacks->undefined_symbol)
3323 (info, name, input_bfd, input_section,
3324 rel->r_offset, TRUE)))
3328 case bfd_reloc_outofrange:
3329 msg = _("internal error: out of range error");
3332 case bfd_reloc_notsupported:
3333 msg = _("internal error: unsupported relocation error");
3336 case bfd_reloc_dangerous:
3337 msg = _("internal error: dangerous error");
3341 msg = _("internal error: unknown error");
3345 if (!((*info->callbacks->warning)
3346 (info, msg, name, input_bfd, input_section,
3357 /* Set the right machine number. */
3360 elf32_arm_object_p (bfd *abfd)
3364 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3366 if (mach != bfd_mach_arm_unknown)
3367 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3369 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3370 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3373 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3378 /* Function to keep ARM specific flags in the ELF header. */
3381 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3383 if (elf_flags_init (abfd)
3384 && elf_elfheader (abfd)->e_flags != flags)
3386 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3388 if (flags & EF_ARM_INTERWORK)
3389 (*_bfd_error_handler)
3390 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3394 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3400 elf_elfheader (abfd)->e_flags = flags;
3401 elf_flags_init (abfd) = TRUE;
3407 /* Copy backend specific data from one object module to another. */
3410 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3415 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3416 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3419 in_flags = elf_elfheader (ibfd)->e_flags;
3420 out_flags = elf_elfheader (obfd)->e_flags;
3422 if (elf_flags_init (obfd)
3423 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3424 && in_flags != out_flags)
3426 /* Cannot mix APCS26 and APCS32 code. */
3427 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3430 /* Cannot mix float APCS and non-float APCS code. */
3431 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3434 /* If the src and dest have different interworking flags
3435 then turn off the interworking bit. */
3436 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3438 if (out_flags & EF_ARM_INTERWORK)
3440 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3443 in_flags &= ~EF_ARM_INTERWORK;
3446 /* Likewise for PIC, though don't warn for this case. */
3447 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3448 in_flags &= ~EF_ARM_PIC;
3451 elf_elfheader (obfd)->e_flags = in_flags;
3452 elf_flags_init (obfd) = TRUE;
3454 /* Also copy the EI_OSABI field. */
3455 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3456 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3461 /* Merge backend specific data from an object file to the output
3462 object file when linking. */
3465 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3469 bfd_boolean flags_compatible = TRUE;
3472 /* Check if we have the same endianess. */
3473 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3476 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3477 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3480 /* The input BFD must have had its flags initialised. */
3481 /* The following seems bogus to me -- The flags are initialized in
3482 the assembler but I don't think an elf_flags_init field is
3483 written into the object. */
3484 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3486 in_flags = elf_elfheader (ibfd)->e_flags;
3487 out_flags = elf_elfheader (obfd)->e_flags;
3489 if (!elf_flags_init (obfd))
3491 /* If the input is the default architecture and had the default
3492 flags then do not bother setting the flags for the output
3493 architecture, instead allow future merges to do this. If no
3494 future merges ever set these flags then they will retain their
3495 uninitialised values, which surprise surprise, correspond
3496 to the default values. */
3497 if (bfd_get_arch_info (ibfd)->the_default
3498 && elf_elfheader (ibfd)->e_flags == 0)
3501 elf_flags_init (obfd) = TRUE;
3502 elf_elfheader (obfd)->e_flags = in_flags;
3504 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3505 && bfd_get_arch_info (obfd)->the_default)
3506 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3511 /* Determine what should happen if the input ARM architecture
3512 does not match the output ARM architecture. */
3513 if (! bfd_arm_merge_machines (ibfd, obfd))
3516 /* Identical flags must be compatible. */
3517 if (in_flags == out_flags)
3520 /* Check to see if the input BFD actually contains any sections. If
3521 not, its flags may not have been initialised either, but it
3522 cannot actually cause any incompatibility. Do not short-circuit
3523 dynamic objects; their section list may be emptied by
3524 elf_link_add_object_symbols.
3526 Also check to see if there are no code sections in the input.
3527 In this case there is no need to check for code specific flags.
3528 XXX - do we need to worry about floating-point format compatability
3529 in data sections ? */
3530 if (!(ibfd->flags & DYNAMIC))
3532 bfd_boolean null_input_bfd = TRUE;
3533 bfd_boolean only_data_sections = TRUE;
3535 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3537 /* Ignore synthetic glue sections. */
3538 if (strcmp (sec->name, ".glue_7")
3539 && strcmp (sec->name, ".glue_7t"))
3541 if ((bfd_get_section_flags (ibfd, sec)
3542 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3543 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3544 only_data_sections = FALSE;
3546 null_input_bfd = FALSE;
3551 if (null_input_bfd || only_data_sections)
3555 /* Complain about various flag mismatches. */
3556 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
3559 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
3561 (in_flags & EF_ARM_EABIMASK) >> 24,
3562 (out_flags & EF_ARM_EABIMASK) >> 24);
3566 /* Not sure what needs to be checked for EABI versions >= 1. */
3567 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
3569 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3572 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3574 in_flags & EF_ARM_APCS_26 ? 26 : 32,
3575 out_flags & EF_ARM_APCS_26 ? 26 : 32);
3576 flags_compatible = FALSE;
3579 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3581 if (in_flags & EF_ARM_APCS_FLOAT)
3583 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3587 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3590 flags_compatible = FALSE;
3593 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
3595 if (in_flags & EF_ARM_VFP_FLOAT)
3597 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3601 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3604 flags_compatible = FALSE;
3607 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
3609 if (in_flags & EF_ARM_MAVERICK_FLOAT)
3611 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3615 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3618 flags_compatible = FALSE;
3621 #ifdef EF_ARM_SOFT_FLOAT
3622 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
3624 /* We can allow interworking between code that is VFP format
3625 layout, and uses either soft float or integer regs for
3626 passing floating point arguments and results. We already
3627 know that the APCS_FLOAT flags match; similarly for VFP
3629 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
3630 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
3632 if (in_flags & EF_ARM_SOFT_FLOAT)
3634 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3638 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3641 flags_compatible = FALSE;
3646 /* Interworking mismatch is only a warning. */
3647 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3649 if (in_flags & EF_ARM_INTERWORK)
3652 (_("Warning: %B supports interworking, whereas %B does not"),
3658 (_("Warning: %B does not support interworking, whereas %B does"),
3664 return flags_compatible;
3667 /* Display the flags field. */
3670 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
3672 FILE * file = (FILE *) ptr;
3673 unsigned long flags;
3675 BFD_ASSERT (abfd != NULL && ptr != NULL);
3677 /* Print normal ELF private data. */
3678 _bfd_elf_print_private_bfd_data (abfd, ptr);
3680 flags = elf_elfheader (abfd)->e_flags;
3681 /* Ignore init flag - it may not be set, despite the flags field
3682 containing valid data. */
3684 /* xgettext:c-format */
3685 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3687 switch (EF_ARM_EABI_VERSION (flags))
3689 case EF_ARM_EABI_UNKNOWN:
3690 /* The following flag bits are GNU extensions and not part of the
3691 official ARM ELF extended ABI. Hence they are only decoded if
3692 the EABI version is not set. */
3693 if (flags & EF_ARM_INTERWORK)
3694 fprintf (file, _(" [interworking enabled]"));
3696 if (flags & EF_ARM_APCS_26)
3697 fprintf (file, " [APCS-26]");
3699 fprintf (file, " [APCS-32]");
3701 if (flags & EF_ARM_VFP_FLOAT)
3702 fprintf (file, _(" [VFP float format]"));
3703 else if (flags & EF_ARM_MAVERICK_FLOAT)
3704 fprintf (file, _(" [Maverick float format]"));
3706 fprintf (file, _(" [FPA float format]"));
3708 if (flags & EF_ARM_APCS_FLOAT)
3709 fprintf (file, _(" [floats passed in float registers]"));
3711 if (flags & EF_ARM_PIC)
3712 fprintf (file, _(" [position independent]"));
3714 if (flags & EF_ARM_NEW_ABI)
3715 fprintf (file, _(" [new ABI]"));
3717 if (flags & EF_ARM_OLD_ABI)
3718 fprintf (file, _(" [old ABI]"));
3720 if (flags & EF_ARM_SOFT_FLOAT)
3721 fprintf (file, _(" [software FP]"));
3723 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
3724 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
3725 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
3726 | EF_ARM_MAVERICK_FLOAT);
3729 case EF_ARM_EABI_VER1:
3730 fprintf (file, _(" [Version1 EABI]"));
3732 if (flags & EF_ARM_SYMSARESORTED)
3733 fprintf (file, _(" [sorted symbol table]"));
3735 fprintf (file, _(" [unsorted symbol table]"));
3737 flags &= ~ EF_ARM_SYMSARESORTED;
3740 case EF_ARM_EABI_VER2:
3741 fprintf (file, _(" [Version2 EABI]"));
3743 if (flags & EF_ARM_SYMSARESORTED)
3744 fprintf (file, _(" [sorted symbol table]"));
3746 fprintf (file, _(" [unsorted symbol table]"));
3748 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
3749 fprintf (file, _(" [dynamic symbols use segment index]"));
3751 if (flags & EF_ARM_MAPSYMSFIRST)
3752 fprintf (file, _(" [mapping symbols precede others]"));
3754 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
3755 | EF_ARM_MAPSYMSFIRST);
3758 case EF_ARM_EABI_VER3:
3759 fprintf (file, _(" [Version3 EABI]"));
3762 case EF_ARM_EABI_VER4:
3763 fprintf (file, _(" [Version4 EABI]"));
3765 if (flags & EF_ARM_BE8)
3766 fprintf (file, _(" [BE8]"));
3768 if (flags & EF_ARM_LE8)
3769 fprintf (file, _(" [LE8]"));
3771 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
3775 fprintf (file, _(" <EABI version unrecognised>"));
3779 flags &= ~ EF_ARM_EABIMASK;
3781 if (flags & EF_ARM_RELEXEC)
3782 fprintf (file, _(" [relocatable executable]"));
3784 if (flags & EF_ARM_HASENTRY)
3785 fprintf (file, _(" [has entry point]"));
3787 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
3790 fprintf (file, _("<Unrecognised flag bits set>"));
3798 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
3800 switch (ELF_ST_TYPE (elf_sym->st_info))
3803 return ELF_ST_TYPE (elf_sym->st_info);
3806 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3807 This allows us to distinguish between data used by Thumb instructions
3808 and non-data (which is probably code) inside Thumb regions of an
3810 if (type != STT_OBJECT)
3811 return ELF_ST_TYPE (elf_sym->st_info);
3822 elf32_arm_gc_mark_hook (asection * sec,
3823 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3824 Elf_Internal_Rela * rel,
3825 struct elf_link_hash_entry * h,
3826 Elf_Internal_Sym * sym)
3830 switch (ELF32_R_TYPE (rel->r_info))
3832 case R_ARM_GNU_VTINHERIT:
3833 case R_ARM_GNU_VTENTRY:
3837 switch (h->root.type)
3839 case bfd_link_hash_defined:
3840 case bfd_link_hash_defweak:
3841 return h->root.u.def.section;
3843 case bfd_link_hash_common:
3844 return h->root.u.c.p->section;
3852 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3857 /* Update the got entry reference counts for the section being removed. */
3860 elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
3861 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3862 asection * sec ATTRIBUTE_UNUSED,
3863 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
3865 Elf_Internal_Shdr *symtab_hdr;
3866 struct elf_link_hash_entry **sym_hashes;
3867 bfd_signed_vma *local_got_refcounts;
3868 const Elf_Internal_Rela *rel, *relend;
3869 struct elf32_arm_link_hash_table * globals;
3871 globals = elf32_arm_hash_table (info);
3873 elf_section_data (sec)->local_dynrel = NULL;
3875 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3876 sym_hashes = elf_sym_hashes (abfd);
3877 local_got_refcounts = elf_local_got_refcounts (abfd);
3879 relend = relocs + sec->reloc_count;
3880 for (rel = relocs; rel < relend; rel++)
3882 unsigned long r_symndx;
3883 struct elf_link_hash_entry *h = NULL;
3886 r_symndx = ELF32_R_SYM (rel->r_info);
3887 if (r_symndx >= symtab_hdr->sh_info)
3889 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3890 while (h->root.type == bfd_link_hash_indirect
3891 || h->root.type == bfd_link_hash_warning)
3892 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3895 r_type = ELF32_R_TYPE (rel->r_info);
3897 r_type = arm_real_reloc_type (globals, r_type);
3903 case R_ARM_GOT_PREL:
3907 if (h->got.refcount > 0)
3908 h->got.refcount -= 1;
3910 else if (local_got_refcounts != NULL)
3912 if (local_got_refcounts[r_symndx] > 0)
3913 local_got_refcounts[r_symndx] -= 1;
3926 case R_ARM_THM_PC22:
3927 /* Should the interworking branches be here also? */
3931 struct elf32_arm_link_hash_entry *eh;
3932 struct elf32_arm_relocs_copied **pp;
3933 struct elf32_arm_relocs_copied *p;
3935 eh = (struct elf32_arm_link_hash_entry *) h;
3937 if (h->plt.refcount > 0)
3939 h->plt.refcount -= 1;
3940 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
3941 eh->plt_thumb_refcount--;
3944 if (r_type == R_ARM_ABS32
3945 || r_type == R_ARM_REL32)
3947 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
3949 if (p->section == sec)
3968 /* Look through the relocs for a section during the first phase. */
3971 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
3972 asection *sec, const Elf_Internal_Rela *relocs)
3974 Elf_Internal_Shdr *symtab_hdr;
3975 struct elf_link_hash_entry **sym_hashes;
3976 struct elf_link_hash_entry **sym_hashes_end;
3977 const Elf_Internal_Rela *rel;
3978 const Elf_Internal_Rela *rel_end;
3981 bfd_vma *local_got_offsets;
3982 struct elf32_arm_link_hash_table *htab;
3984 if (info->relocatable)
3987 htab = elf32_arm_hash_table (info);
3990 /* Create dynamic sections for relocatable executables so that we can
3991 copy relocations. */
3992 if (htab->root.is_relocatable_executable
3993 && ! htab->root.dynamic_sections_created)
3995 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
3999 dynobj = elf_hash_table (info)->dynobj;
4000 local_got_offsets = elf_local_got_offsets (abfd);
4002 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4003 sym_hashes = elf_sym_hashes (abfd);
4004 sym_hashes_end = sym_hashes
4005 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
4007 if (!elf_bad_symtab (abfd))
4008 sym_hashes_end -= symtab_hdr->sh_info;
4010 rel_end = relocs + sec->reloc_count;
4011 for (rel = relocs; rel < rel_end; rel++)
4013 struct elf_link_hash_entry *h;
4014 struct elf32_arm_link_hash_entry *eh;
4015 unsigned long r_symndx;
4018 r_symndx = ELF32_R_SYM (rel->r_info);
4019 r_type = ELF32_R_TYPE (rel->r_info);
4021 r_type = arm_real_reloc_type (htab, r_type);
4023 if (r_symndx < symtab_hdr->sh_info)
4026 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4028 eh = (struct elf32_arm_link_hash_entry *) h;
4034 case R_ARM_GOT_PREL:
4036 /* This symbol requires a global offset table entry. */
4043 bfd_signed_vma *local_got_refcounts;
4045 /* This is a global offset table entry for a local symbol. */
4046 local_got_refcounts = elf_local_got_refcounts (abfd);
4047 if (local_got_refcounts == NULL)
4051 size = symtab_hdr->sh_info;
4052 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4053 local_got_refcounts = bfd_zalloc (abfd, size);
4054 if (local_got_refcounts == NULL)
4056 elf_local_got_refcounts (abfd) = local_got_refcounts;
4058 local_got_refcounts[r_symndx] += 1;
4060 if (r_type == R_ARM_GOT32)
4066 if (htab->sgot == NULL)
4068 if (htab->root.dynobj == NULL)
4069 htab->root.dynobj = abfd;
4070 if (!create_got_section (htab->root.dynobj, info))
4084 case R_ARM_THM_PC22:
4085 /* Should the interworking branches be listed here? */
4088 /* If this reloc is in a read-only section, we might
4089 need a copy reloc. We can't check reliably at this
4090 stage whether the section is read-only, as input
4091 sections have not yet been mapped to output sections.
4092 Tentatively set the flag for now, and correct in
4093 adjust_dynamic_symbol. */
4097 /* We may need a .plt entry if the function this reloc
4098 refers to is in a different object. We can't tell for
4099 sure yet, because something later might force the
4101 if (r_type == R_ARM_PC24
4103 || r_type == R_ARM_CALL
4104 || r_type == R_ARM_JUMP24
4105 || r_type == R_ARM_PREL31
4107 || r_type == R_ARM_PLT32
4108 || r_type == R_ARM_THM_PC22)
4111 /* If we create a PLT entry, this relocation will reference
4112 it, even if it's an ABS32 relocation. */
4113 h->plt.refcount += 1;
4115 if (r_type == R_ARM_THM_PC22)
4116 eh->plt_thumb_refcount += 1;
4119 /* If we are creating a shared library or relocatable executable,
4120 and this is a reloc against a global symbol, or a non PC
4121 relative reloc against a local symbol, then we need to copy
4122 the reloc into the shared library. However, if we are linking
4123 with -Bsymbolic, we do not need to copy a reloc against a
4124 global symbol which is defined in an object we are
4125 including in the link (i.e., DEF_REGULAR is set). At
4126 this point we have not seen all the input files, so it is
4127 possible that DEF_REGULAR is not set now but will be set
4128 later (it is never cleared). We account for that
4129 possibility below by storing information in the
4130 relocs_copied field of the hash table entry. */
4131 if ((info->shared || htab->root.is_relocatable_executable)
4132 && (sec->flags & SEC_ALLOC) != 0
4133 && ((r_type != R_ARM_PC24
4134 && r_type != R_ARM_PLT32
4136 && r_type != R_ARM_CALL
4137 && r_type != R_ARM_JUMP24
4138 && r_type != R_ARM_PREL31
4140 && r_type != R_ARM_REL32
4141 && r_type != R_ARM_THM_PC22)
4143 && (! info->symbolic
4144 || !h->def_regular))))
4146 struct elf32_arm_relocs_copied *p, **head;
4148 /* When creating a shared object, we must copy these
4149 reloc types into the output file. We create a reloc
4150 section in dynobj and make room for this reloc. */
4155 name = (bfd_elf_string_from_elf_section
4157 elf_elfheader (abfd)->e_shstrndx,
4158 elf_section_data (sec)->rel_hdr.sh_name));
4162 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
4163 && strcmp (bfd_get_section_name (abfd, sec),
4166 sreloc = bfd_get_section_by_name (dynobj, name);
4171 sreloc = bfd_make_section (dynobj, name);
4172 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4173 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4174 if ((sec->flags & SEC_ALLOC) != 0
4175 /* BPABI objects never have dynamic
4176 relocations mapped. */
4177 && !htab->symbian_p)
4178 flags |= SEC_ALLOC | SEC_LOAD;
4180 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4181 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
4185 elf_section_data (sec)->sreloc = sreloc;
4188 /* If this is a global symbol, we count the number of
4189 relocations we need for this symbol. */
4192 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4196 /* Track dynamic relocs needed for local syms too.
4197 We really need local syms available to do this
4201 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4206 head = ((struct elf32_arm_relocs_copied **)
4207 &elf_section_data (s)->local_dynrel);
4211 if (p == NULL || p->section != sec)
4213 bfd_size_type amt = sizeof *p;
4215 p = bfd_alloc (htab->root.dynobj, amt);
4224 if (r_type == R_ARM_ABS32
4225 || r_type == R_ARM_REL32)
4230 /* This relocation describes the C++ object vtable hierarchy.
4231 Reconstruct it for later use during GC. */
4232 case R_ARM_GNU_VTINHERIT:
4233 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4237 /* This relocation describes which C++ vtable entries are actually
4238 used. Record for later use during GC. */
4239 case R_ARM_GNU_VTENTRY:
4240 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
4250 is_arm_mapping_symbol_name (const char * name)
4252 return (name != NULL)
4254 && ((name[1] == 'a') || (name[1] == 't') || (name[1] == 'd'))
4258 /* Treat mapping symbols as special target symbols. */
4261 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4263 return is_arm_mapping_symbol_name (sym->name);
4266 /* This is a copy of elf_find_function() from elf.c except that
4267 ARM mapping symbols are ignored when looking for function names
4268 and STT_ARM_TFUNC is considered to a function type. */
4271 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4275 const char ** filename_ptr,
4276 const char ** functionname_ptr)
4278 const char * filename = NULL;
4279 asymbol * func = NULL;
4280 bfd_vma low_func = 0;
4283 for (p = symbols; *p != NULL; p++)
4287 q = (elf_symbol_type *) *p;
4289 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4294 filename = bfd_asymbol_name (&q->symbol);
4298 /* Skip $a and $t symbols. */
4299 if ((q->symbol.flags & BSF_LOCAL)
4300 && is_arm_mapping_symbol_name (q->symbol.name))
4304 if (bfd_get_section (&q->symbol) == section
4305 && q->symbol.value >= low_func
4306 && q->symbol.value <= offset)
4308 func = (asymbol *) q;
4309 low_func = q->symbol.value;
4319 *filename_ptr = filename;
4320 if (functionname_ptr)
4321 *functionname_ptr = bfd_asymbol_name (func);
4327 /* Find the nearest line to a particular section and offset, for error
4328 reporting. This code is a duplicate of the code in elf.c, except
4329 that it uses arm_elf_find_function. */
4332 elf32_arm_find_nearest_line (bfd * abfd,
4336 const char ** filename_ptr,
4337 const char ** functionname_ptr,
4338 unsigned int * line_ptr)
4340 bfd_boolean found = FALSE;
4342 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4344 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4345 filename_ptr, functionname_ptr,
4347 & elf_tdata (abfd)->dwarf2_find_line_info))
4349 if (!*functionname_ptr)
4350 arm_elf_find_function (abfd, section, symbols, offset,
4351 *filename_ptr ? NULL : filename_ptr,
4357 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4358 & found, filename_ptr,
4359 functionname_ptr, line_ptr,
4360 & elf_tdata (abfd)->line_info))
4363 if (found && (*functionname_ptr || *line_ptr))
4366 if (symbols == NULL)
4369 if (! arm_elf_find_function (abfd, section, symbols, offset,
4370 filename_ptr, functionname_ptr))
4377 /* Adjust a symbol defined by a dynamic object and referenced by a
4378 regular object. The current definition is in some section of the
4379 dynamic object, but we're not including those sections. We have to
4380 change the definition to something the rest of the link can
4384 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4385 struct elf_link_hash_entry * h)
4389 unsigned int power_of_two;
4390 struct elf32_arm_link_hash_entry * eh;
4391 struct elf32_arm_link_hash_table *globals;
4393 globals = elf32_arm_hash_table (info);
4394 dynobj = elf_hash_table (info)->dynobj;
4396 /* Make sure we know what is going on here. */
4397 BFD_ASSERT (dynobj != NULL
4399 || h->u.weakdef != NULL
4402 && !h->def_regular)));
4404 eh = (struct elf32_arm_link_hash_entry *) h;
4406 /* If this is a function, put it in the procedure linkage table. We
4407 will fill in the contents of the procedure linkage table later,
4408 when we know the address of the .got section. */
4409 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
4412 if (h->plt.refcount <= 0
4413 || SYMBOL_CALLS_LOCAL (info, h)
4414 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4415 && h->root.type == bfd_link_hash_undefweak))
4417 /* This case can occur if we saw a PLT32 reloc in an input
4418 file, but the symbol was never referred to by a dynamic
4419 object, or if all references were garbage collected. In
4420 such a case, we don't actually need to build a procedure
4421 linkage table, and we can just do a PC24 reloc instead. */
4422 h->plt.offset = (bfd_vma) -1;
4423 eh->plt_thumb_refcount = 0;
4431 /* It's possible that we incorrectly decided a .plt reloc was
4432 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4433 in check_relocs. We can't decide accurately between function
4434 and non-function syms in check-relocs; Objects loaded later in
4435 the link may change h->type. So fix it now. */
4436 h->plt.offset = (bfd_vma) -1;
4437 eh->plt_thumb_refcount = 0;
4440 /* If this is a weak symbol, and there is a real definition, the
4441 processor independent code will have arranged for us to see the
4442 real definition first, and we can just use the same value. */
4443 if (h->u.weakdef != NULL)
4445 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4446 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4447 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4448 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4452 /* This is a reference to a symbol defined by a dynamic object which
4453 is not a function. */
4455 /* If we are creating a shared library, we must presume that the
4456 only references to the symbol are via the global offset table.
4457 For such cases we need not do anything here; the relocations will
4458 be handled correctly by relocate_section. Relocatable executables
4459 can reference data in shared objects directly, so we don't need to
4460 do anything here. */
4461 if (info->shared || globals->root.is_relocatable_executable)
4464 /* We must allocate the symbol in our .dynbss section, which will
4465 become part of the .bss section of the executable. There will be
4466 an entry for this symbol in the .dynsym section. The dynamic
4467 object will contain position independent code, so all references
4468 from the dynamic object to this symbol will go through the global
4469 offset table. The dynamic linker will use the .dynsym entry to
4470 determine the address it must put in the global offset table, so
4471 both the dynamic object and the regular object will refer to the
4472 same memory location for the variable. */
4473 s = bfd_get_section_by_name (dynobj, ".dynbss");
4474 BFD_ASSERT (s != NULL);
4476 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4477 copy the initial value out of the dynamic object and into the
4478 runtime process image. We need to remember the offset into the
4479 .rel.bss section we are going to use. */
4480 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4484 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
4485 BFD_ASSERT (srel != NULL);
4486 srel->size += sizeof (Elf32_External_Rel);
4490 /* We need to figure out the alignment required for this symbol. I
4491 have no idea how ELF linkers handle this. */
4492 power_of_two = bfd_log2 (h->size);
4493 if (power_of_two > 3)
4496 /* Apply the required alignment. */
4497 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4498 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4500 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4504 /* Define the symbol as being at this point in the section. */
4505 h->root.u.def.section = s;
4506 h->root.u.def.value = s->size;
4508 /* Increment the section size to make room for the symbol. */
4514 /* Allocate space in .plt, .got and associated reloc sections for
4518 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
4520 struct bfd_link_info *info;
4521 struct elf32_arm_link_hash_table *htab;
4522 struct elf32_arm_link_hash_entry *eh;
4523 struct elf32_arm_relocs_copied *p;
4525 eh = (struct elf32_arm_link_hash_entry *) h;
4527 if (h->root.type == bfd_link_hash_indirect)
4530 if (h->root.type == bfd_link_hash_warning)
4531 /* When warning symbols are created, they **replace** the "real"
4532 entry in the hash table, thus we never get to see the real
4533 symbol in a hash traversal. So look at it now. */
4534 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4536 info = (struct bfd_link_info *) inf;
4537 htab = elf32_arm_hash_table (info);
4539 if (htab->root.dynamic_sections_created
4540 && h->plt.refcount > 0)
4542 /* Make sure this symbol is output as a dynamic symbol.
4543 Undefined weak syms won't yet be marked as dynamic. */
4544 if (h->dynindx == -1
4545 && !h->forced_local)
4547 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4552 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4554 asection *s = htab->splt;
4556 /* If this is the first .plt entry, make room for the special
4559 s->size += htab->plt_header_size;
4561 h->plt.offset = s->size;
4563 /* If we will insert a Thumb trampoline before this PLT, leave room
4565 if (!htab->symbian_p && eh->plt_thumb_refcount > 0)
4567 h->plt.offset += PLT_THUMB_STUB_SIZE;
4568 s->size += PLT_THUMB_STUB_SIZE;
4571 /* If this symbol is not defined in a regular file, and we are
4572 not generating a shared library, then set the symbol to this
4573 location in the .plt. This is required to make function
4574 pointers compare as equal between the normal executable and
4575 the shared library. */
4579 h->root.u.def.section = s;
4580 h->root.u.def.value = h->plt.offset;
4582 /* Make sure the function is not marked as Thumb, in case
4583 it is the target of an ABS32 relocation, which will
4584 point to the PLT entry. */
4585 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
4586 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
4589 /* Make room for this entry. */
4590 s->size += htab->plt_entry_size;
4592 if (!htab->symbian_p)
4594 /* We also need to make an entry in the .got.plt section, which
4595 will be placed in the .got section by the linker script. */
4596 eh->plt_got_offset = htab->sgotplt->size;
4597 htab->sgotplt->size += 4;
4600 /* We also need to make an entry in the .rel.plt section. */
4601 htab->srelplt->size += sizeof (Elf32_External_Rel);
4605 h->plt.offset = (bfd_vma) -1;
4611 h->plt.offset = (bfd_vma) -1;
4615 if (h->got.refcount > 0)
4620 /* Make sure this symbol is output as a dynamic symbol.
4621 Undefined weak syms won't yet be marked as dynamic. */
4622 if (h->dynindx == -1
4623 && !h->forced_local)
4625 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4629 if (!htab->symbian_p)
4632 h->got.offset = s->size;
4634 dyn = htab->root.dynamic_sections_created;
4635 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4636 || h->root.type != bfd_link_hash_undefweak)
4638 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
4639 htab->srelgot->size += sizeof (Elf32_External_Rel);
4643 h->got.offset = (bfd_vma) -1;
4645 if (eh->relocs_copied == NULL)
4648 /* In the shared -Bsymbolic case, discard space allocated for
4649 dynamic pc-relative relocs against symbols which turn out to be
4650 defined in regular objects. For the normal shared case, discard
4651 space for pc-relative relocs that have become local due to symbol
4652 visibility changes. */
4654 if (info->shared || htab->root.is_relocatable_executable)
4656 /* Discard relocs on undefined weak syms with non-default
4658 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4659 && h->root.type == bfd_link_hash_undefweak)
4660 eh->relocs_copied = NULL;
4661 else if (htab->root.is_relocatable_executable && h->dynindx == -1
4662 && h->root.type == bfd_link_hash_new)
4664 /* Output absolute symbols so that we can create relocations
4665 against them. For normal symbols we output a relocation
4666 against the section that contains them. */
4667 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4674 /* For the non-shared case, discard space for relocs against
4675 symbols which turn out to need copy relocs or are not
4681 || (htab->root.dynamic_sections_created
4682 && (h->root.type == bfd_link_hash_undefweak
4683 || h->root.type == bfd_link_hash_undefined))))
4685 /* Make sure this symbol is output as a dynamic symbol.
4686 Undefined weak syms won't yet be marked as dynamic. */
4687 if (h->dynindx == -1
4688 && !h->forced_local)
4690 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4694 /* If that succeeded, we know we'll be keeping all the
4696 if (h->dynindx != -1)
4700 eh->relocs_copied = NULL;
4705 /* Finally, allocate space. */
4706 for (p = eh->relocs_copied; p != NULL; p = p->next)
4708 asection *sreloc = elf_section_data (p->section)->sreloc;
4709 sreloc->size += p->count * sizeof (Elf32_External_Rel);
4715 /* Find any dynamic relocs that apply to read-only sections. */
4718 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
4720 struct elf32_arm_link_hash_entry *eh;
4721 struct elf32_arm_relocs_copied *p;
4723 if (h->root.type == bfd_link_hash_warning)
4724 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4726 eh = (struct elf32_arm_link_hash_entry *) h;
4727 for (p = eh->relocs_copied; p != NULL; p = p->next)
4729 asection *s = p->section;
4731 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4733 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4735 info->flags |= DF_TEXTREL;
4737 /* Not an error, just cut short the traversal. */
4744 /* Set the sizes of the dynamic sections. */
4747 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4748 struct bfd_link_info * info)
4755 struct elf32_arm_link_hash_table *htab;
4757 htab = elf32_arm_hash_table (info);
4758 dynobj = elf_hash_table (info)->dynobj;
4759 BFD_ASSERT (dynobj != NULL);
4761 if (elf_hash_table (info)->dynamic_sections_created)
4763 /* Set the contents of the .interp section to the interpreter. */
4764 if (info->executable)
4766 s = bfd_get_section_by_name (dynobj, ".interp");
4767 BFD_ASSERT (s != NULL);
4768 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4769 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4773 /* Set up .got offsets for local syms, and space for local dynamic
4775 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4777 bfd_signed_vma *local_got;
4778 bfd_signed_vma *end_local_got;
4779 char *local_tls_type;
4780 bfd_size_type locsymcount;
4781 Elf_Internal_Shdr *symtab_hdr;
4784 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4787 for (s = ibfd->sections; s != NULL; s = s->next)
4789 struct elf32_arm_relocs_copied *p;
4791 for (p = *((struct elf32_arm_relocs_copied **)
4792 &elf_section_data (s)->local_dynrel);
4796 if (!bfd_is_abs_section (p->section)
4797 && bfd_is_abs_section (p->section->output_section))
4799 /* Input section has been discarded, either because
4800 it is a copy of a linkonce section or due to
4801 linker script /DISCARD/, so we'll be discarding
4804 else if (p->count != 0)
4806 srel = elf_section_data (p->section)->sreloc;
4807 srel->size += p->count * sizeof (Elf32_External_Rel);
4808 if ((p->section->output_section->flags & SEC_READONLY) != 0)
4809 info->flags |= DF_TEXTREL;
4814 local_got = elf_local_got_refcounts (ibfd);
4818 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4819 locsymcount = symtab_hdr->sh_info;
4820 end_local_got = local_got + locsymcount;
4822 srel = htab->srelgot;
4823 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
4827 *local_got = s->size;
4830 srel->size += sizeof (Elf32_External_Rel);
4833 *local_got = (bfd_vma) -1;
4837 /* Allocate global sym .plt and .got entries, and space for global
4838 sym dynamic relocs. */
4839 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
4841 /* The check_relocs and adjust_dynamic_symbol entry points have
4842 determined the sizes of the various dynamic sections. Allocate
4846 for (s = dynobj->sections; s != NULL; s = s->next)
4851 if ((s->flags & SEC_LINKER_CREATED) == 0)
4854 /* It's OK to base decisions on the section name, because none
4855 of the dynobj section names depend upon the input files. */
4856 name = bfd_get_section_name (dynobj, s);
4860 if (strcmp (name, ".plt") == 0)
4864 /* Strip this section if we don't need it; see the
4870 /* Remember whether there is a PLT. */
4874 else if (strncmp (name, ".rel", 4) == 0)
4878 /* If we don't need this section, strip it from the
4879 output file. This is mostly to handle .rel.bss and
4880 .rel.plt. We must create both sections in
4881 create_dynamic_sections, because they must be created
4882 before the linker maps input sections to output
4883 sections. The linker does that before
4884 adjust_dynamic_symbol is called, and it is that
4885 function which decides whether anything needs to go
4886 into these sections. */
4891 /* Remember whether there are any reloc sections other
4893 if (strcmp (name, ".rel.plt") != 0)
4896 /* We use the reloc_count field as a counter if we need
4897 to copy relocs into the output file. */
4901 else if (strncmp (name, ".got", 4) != 0)
4903 /* It's not one of our sections, so don't allocate space. */
4909 _bfd_strip_section_from_output (info, s);
4913 /* Allocate memory for the section contents. */
4914 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4915 if (s->contents == NULL && s->size != 0)
4919 if (elf_hash_table (info)->dynamic_sections_created)
4921 /* Add some entries to the .dynamic section. We fill in the
4922 values later, in elf32_arm_finish_dynamic_sections, but we
4923 must add the entries now so that we get the correct size for
4924 the .dynamic section. The DT_DEBUG entry is filled in by the
4925 dynamic linker and used by the debugger. */
4926 #define add_dynamic_entry(TAG, VAL) \
4927 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4931 if (!add_dynamic_entry (DT_DEBUG, 0))
4937 if ( !add_dynamic_entry (DT_PLTGOT, 0)
4938 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4939 || !add_dynamic_entry (DT_PLTREL, DT_REL)
4940 || !add_dynamic_entry (DT_JMPREL, 0))
4946 if ( !add_dynamic_entry (DT_REL, 0)
4947 || !add_dynamic_entry (DT_RELSZ, 0)
4948 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
4952 /* If any dynamic relocs apply to a read-only section,
4953 then we need a DT_TEXTREL entry. */
4954 if ((info->flags & DF_TEXTREL) == 0)
4955 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
4958 if ((info->flags & DF_TEXTREL) != 0)
4960 if (!add_dynamic_entry (DT_TEXTREL, 0))
4962 info->flags |= DF_TEXTREL;
4965 #undef add_synamic_entry
4970 /* Finish up dynamic symbol handling. We set the contents of various
4971 dynamic sections here. */
4974 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
4975 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
4978 struct elf32_arm_link_hash_table *htab;
4979 struct elf32_arm_link_hash_entry *eh;
4981 dynobj = elf_hash_table (info)->dynobj;
4982 htab = elf32_arm_hash_table (info);
4983 eh = (struct elf32_arm_link_hash_entry *) h;
4985 if (h->plt.offset != (bfd_vma) -1)
4991 Elf_Internal_Rela rel;
4993 /* This symbol has an entry in the procedure linkage table. Set
4996 BFD_ASSERT (h->dynindx != -1);
4998 splt = bfd_get_section_by_name (dynobj, ".plt");
4999 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
5000 BFD_ASSERT (splt != NULL && srel != NULL);
5002 /* Fill in the entry in the procedure linkage table. */
5003 if (htab->symbian_p)
5006 for (i = 0; i < htab->plt_entry_size / 4; ++i)
5007 bfd_put_32 (output_bfd,
5008 elf32_arm_symbian_plt_entry[i],
5009 splt->contents + h->plt.offset + 4 * i);
5011 /* Fill in the entry in the .rel.plt section. */
5012 rel.r_offset = (splt->output_section->vma
5013 + splt->output_offset
5014 + h->plt.offset + 4 * (i - 1));
5015 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5017 /* Get the index in the procedure linkage table which
5018 corresponds to this symbol. This is the index of this symbol
5019 in all the symbols for which we are making plt entries. The
5020 first entry in the procedure linkage table is reserved. */
5021 plt_index = ((h->plt.offset - htab->plt_header_size)
5022 / htab->plt_entry_size);
5027 bfd_vma got_displacement;
5030 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5031 BFD_ASSERT (sgot != NULL);
5033 /* Get the offset into the .got.plt table of the entry that
5034 corresponds to this function. */
5035 got_offset = eh->plt_got_offset;
5037 /* Get the index in the procedure linkage table which
5038 corresponds to this symbol. This is the index of this symbol
5039 in all the symbols for which we are making plt entries. The
5040 first three entries in .got.plt are reserved; after that
5041 symbols appear in the same order as in .plt. */
5042 plt_index = (got_offset - 12) / 4;
5044 /* Calculate the displacement between the PLT slot and the
5045 entry in the GOT. The eight-byte offset accounts for the
5046 value produced by adding to pc in the first instruction
5048 got_displacement = (sgot->output_section->vma
5049 + sgot->output_offset
5051 - splt->output_section->vma
5052 - splt->output_offset
5056 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5058 if (eh->plt_thumb_refcount > 0)
5060 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5061 splt->contents + h->plt.offset - 4);
5062 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5063 splt->contents + h->plt.offset - 2);
5066 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5067 splt->contents + h->plt.offset + 0);
5068 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5069 splt->contents + h->plt.offset + 4);
5070 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5071 splt->contents + h->plt.offset + 8);
5072 #ifdef FOUR_WORD_PLT
5073 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5074 splt->contents + h->plt.offset + 12);
5077 /* Fill in the entry in the global offset table. */
5078 bfd_put_32 (output_bfd,
5079 (splt->output_section->vma
5080 + splt->output_offset),
5081 sgot->contents + got_offset);
5083 /* Fill in the entry in the .rel.plt section. */
5084 rel.r_offset = (sgot->output_section->vma
5085 + sgot->output_offset
5087 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5090 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5091 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5093 if (!h->def_regular)
5095 /* Mark the symbol as undefined, rather than as defined in
5096 the .plt section. Leave the value alone. */
5097 sym->st_shndx = SHN_UNDEF;
5098 /* If the symbol is weak, we do need to clear the value.
5099 Otherwise, the PLT entry would provide a definition for
5100 the symbol even if the symbol wasn't defined anywhere,
5101 and so the symbol would never be NULL. */
5102 if (!h->ref_regular_nonweak)
5107 if (h->got.offset != (bfd_vma) -1)
5111 Elf_Internal_Rela rel;
5114 /* This symbol has an entry in the global offset table. Set it
5116 sgot = bfd_get_section_by_name (dynobj, ".got");
5117 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5118 BFD_ASSERT (sgot != NULL && srel != NULL);
5120 rel.r_offset = (sgot->output_section->vma
5121 + sgot->output_offset
5122 + (h->got.offset &~ (bfd_vma) 1));
5124 /* If this is a static link, or it is a -Bsymbolic link and the
5125 symbol is defined locally or was forced to be local because
5126 of a version file, we just want to emit a RELATIVE reloc.
5127 The entry in the global offset table will already have been
5128 initialized in the relocate_section function. */
5130 && SYMBOL_REFERENCES_LOCAL (info, h))
5132 BFD_ASSERT((h->got.offset & 1) != 0);
5133 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5137 BFD_ASSERT((h->got.offset & 1) == 0);
5138 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5139 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5142 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5143 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5149 Elf_Internal_Rela rel;
5152 /* This symbol needs a copy reloc. Set it up. */
5153 BFD_ASSERT (h->dynindx != -1
5154 && (h->root.type == bfd_link_hash_defined
5155 || h->root.type == bfd_link_hash_defweak));
5157 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5159 BFD_ASSERT (s != NULL);
5161 rel.r_offset = (h->root.u.def.value
5162 + h->root.u.def.section->output_section->vma
5163 + h->root.u.def.section->output_offset);
5164 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5165 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5166 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5169 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5170 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5171 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5172 sym->st_shndx = SHN_ABS;
5177 /* Finish up the dynamic sections. */
5180 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5186 dynobj = elf_hash_table (info)->dynobj;
5188 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5189 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5190 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5192 if (elf_hash_table (info)->dynamic_sections_created)
5195 Elf32_External_Dyn *dyncon, *dynconend;
5196 struct elf32_arm_link_hash_table *htab;
5198 htab = elf32_arm_hash_table (info);
5199 splt = bfd_get_section_by_name (dynobj, ".plt");
5200 BFD_ASSERT (splt != NULL && sdyn != NULL);
5202 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5203 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5205 for (; dyncon < dynconend; dyncon++)
5207 Elf_Internal_Dyn dyn;
5211 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5222 goto get_vma_if_bpabi;
5225 goto get_vma_if_bpabi;
5228 goto get_vma_if_bpabi;
5230 name = ".gnu.version";
5231 goto get_vma_if_bpabi;
5233 name = ".gnu.version_d";
5234 goto get_vma_if_bpabi;
5236 name = ".gnu.version_r";
5237 goto get_vma_if_bpabi;
5245 s = bfd_get_section_by_name (output_bfd, name);
5246 BFD_ASSERT (s != NULL);
5247 if (!htab->symbian_p)
5248 dyn.d_un.d_ptr = s->vma;
5250 /* In the BPABI, tags in the PT_DYNAMIC section point
5251 at the file offset, not the memory address, for the
5252 convenience of the post linker. */
5253 dyn.d_un.d_ptr = s->filepos;
5254 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5258 if (htab->symbian_p)
5263 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5264 BFD_ASSERT (s != NULL);
5265 dyn.d_un.d_val = s->size;
5266 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5270 if (!htab->symbian_p)
5272 /* My reading of the SVR4 ABI indicates that the
5273 procedure linkage table relocs (DT_JMPREL) should be
5274 included in the overall relocs (DT_REL). This is
5275 what Solaris does. However, UnixWare can not handle
5276 that case. Therefore, we override the DT_RELSZ entry
5277 here to make it not include the JMPREL relocs. Since
5278 the linker script arranges for .rel.plt to follow all
5279 other relocation sections, we don't have to worry
5280 about changing the DT_REL entry. */
5281 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5283 dyn.d_un.d_val -= s->size;
5284 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5292 /* In the BPABI, the DT_REL tag must point at the file
5293 offset, not the VMA, of the first relocation
5294 section. So, we use code similar to that in
5295 elflink.c, but do not check for SHF_ALLOC on the
5296 relcoation section, since relocations sections are
5297 never allocated under the BPABI. The comments above
5298 about Unixware notwithstanding, we include all of the
5299 relocations here. */
5300 if (htab->symbian_p)
5303 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5304 ? SHT_REL : SHT_RELA);
5306 for (i = 1; i < elf_numsections (output_bfd); i++)
5308 Elf_Internal_Shdr *hdr
5309 = elf_elfsections (output_bfd)[i];
5310 if (hdr->sh_type == type)
5312 if (dyn.d_tag == DT_RELSZ
5313 || dyn.d_tag == DT_RELASZ)
5314 dyn.d_un.d_val += hdr->sh_size;
5315 else if ((ufile_ptr) hdr->sh_offset
5316 <= dyn.d_un.d_val - 1)
5317 dyn.d_un.d_val = hdr->sh_offset;
5320 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5324 /* Set the bottom bit of DT_INIT/FINI if the
5325 corresponding function is Thumb. */
5327 name = info->init_function;
5330 name = info->fini_function;
5332 /* If it wasn't set by elf_bfd_final_link
5333 then there is nothing to adjust. */
5334 if (dyn.d_un.d_val != 0)
5336 struct elf_link_hash_entry * eh;
5338 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5339 FALSE, FALSE, TRUE);
5340 if (eh != (struct elf_link_hash_entry *) NULL
5341 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5343 dyn.d_un.d_val |= 1;
5344 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5351 /* Fill in the first entry in the procedure linkage table. */
5352 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5354 bfd_vma got_displacement;
5356 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5357 got_displacement = (sgot->output_section->vma
5358 + sgot->output_offset
5359 - splt->output_section->vma
5360 - splt->output_offset
5363 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5364 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5365 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5366 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5367 #ifdef FOUR_WORD_PLT
5368 /* The displacement value goes in the otherwise-unused last word of
5369 the second entry. */
5370 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5372 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5376 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5377 really seem like the right value. */
5378 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5381 /* Fill in the first three entries in the global offset table. */
5387 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5389 bfd_put_32 (output_bfd,
5390 sdyn->output_section->vma + sdyn->output_offset,
5392 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5393 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5396 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5403 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5405 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5406 struct elf32_arm_link_hash_table *globals;
5408 i_ehdrp = elf_elfheader (abfd);
5410 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
5411 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
5413 i_ehdrp->e_ident[EI_OSABI] = 0;
5414 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
5418 globals = elf32_arm_hash_table (link_info);
5419 if (globals->byteswap_code)
5420 i_ehdrp->e_flags |= EF_ARM_BE8;
5424 static enum elf_reloc_type_class
5425 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
5427 switch ((int) ELF32_R_TYPE (rela->r_info))
5429 case R_ARM_RELATIVE:
5430 return reloc_class_relative;
5431 case R_ARM_JUMP_SLOT:
5432 return reloc_class_plt;
5434 return reloc_class_copy;
5436 return reloc_class_normal;
5440 /* Set the right machine number for an Arm ELF file. */
5443 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
5445 if (hdr->sh_type == SHT_NOTE)
5446 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5452 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
5454 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
5457 /* Return TRUE if this is an unwinding table entry. */
5460 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
5464 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
5465 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
5466 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
5467 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
5471 /* Set the type and flags for an ARM section. We do this by
5472 the section name, which is a hack, but ought to work. */
5475 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
5479 name = bfd_get_section_name (abfd, sec);
5481 if (is_arm_elf_unwind_section_name (abfd, name))
5483 hdr->sh_type = SHT_ARM_EXIDX;
5484 hdr->sh_flags |= SHF_LINK_ORDER;
5489 /* Handle an ARM specific section when reading an object file. This is
5490 called when bfd_section_from_shdr finds a section with an unknown
5494 elf32_arm_section_from_shdr (bfd *abfd,
5495 Elf_Internal_Shdr * hdr,
5499 /* There ought to be a place to keep ELF backend specific flags, but
5500 at the moment there isn't one. We just keep track of the
5501 sections by their name, instead. Fortunately, the ABI gives
5502 names for all the ARM specific sections, so we will probably get
5504 switch (hdr->sh_type)
5513 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5519 /* Called for each symbol. Builds a section map based on mapping symbols.
5520 Does not alter any of the symbols. */
5523 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
5525 Elf_Internal_Sym *elfsym,
5526 asection *input_sec,
5527 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
5530 elf32_arm_section_map *map;
5531 struct elf32_arm_link_hash_table *globals;
5533 /* Only do this on final link. */
5534 if (info->relocatable)
5537 /* Only build a map if we need to byteswap code. */
5538 globals = elf32_arm_hash_table (info);
5539 if (!globals->byteswap_code)
5542 /* We only want mapping symbols. */
5543 if (! is_arm_mapping_symbol_name (name))
5546 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
5547 map = elf32_arm_section_data (input_sec)->map;
5548 /* TODO: This may be inefficient, but we probably don't usually have many
5549 mapping symbols per section. */
5550 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
5551 elf32_arm_section_data (input_sec)->map = map;
5553 map[mapcount - 1].vma = elfsym->st_value;
5554 map[mapcount - 1].type = name[1];
5559 /* Allocate target specific section data. */
5562 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
5564 struct _arm_elf_section_data *sdata;
5565 bfd_size_type amt = sizeof (*sdata);
5567 sdata = bfd_zalloc (abfd, amt);
5570 sec->used_by_bfd = sdata;
5572 return _bfd_elf_new_section_hook (abfd, sec);
5576 /* Used to order a list of mapping symbols by address. */
5579 elf32_arm_compare_mapping (const void * a, const void * b)
5581 return ((const elf32_arm_section_map *) a)->vma
5582 > ((const elf32_arm_section_map *) b)->vma;
5586 /* Do code byteswapping. Return FALSE afterwards so that the section is
5587 written out as normal. */
5590 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
5594 elf32_arm_section_map *map;
5601 mapcount = elf32_arm_section_data (sec)->mapcount;
5602 map = elf32_arm_section_data (sec)->map;
5607 qsort (map, mapcount, sizeof (elf32_arm_section_map),
5608 elf32_arm_compare_mapping);
5610 offset = sec->output_section->vma + sec->output_offset;
5611 ptr = map[0].vma - offset;
5612 for (i = 0; i < mapcount; i++)
5614 if (i == mapcount - 1)
5617 end = map[i + 1].vma - offset;
5619 switch (map[i].type)
5622 /* Byte swap code words. */
5623 while (ptr + 3 < end)
5625 tmp = contents[ptr];
5626 contents[ptr] = contents[ptr + 3];
5627 contents[ptr + 3] = tmp;
5628 tmp = contents[ptr + 1];
5629 contents[ptr + 1] = contents[ptr + 2];
5630 contents[ptr + 2] = tmp;
5636 /* Byte swap code halfwords. */
5637 while (ptr + 1 < end)
5639 tmp = contents[ptr];
5640 contents[ptr] = contents[ptr + 1];
5641 contents[ptr + 1] = tmp;
5647 /* Leave data alone. */
5656 /* Display STT_ARM_TFUNC symbols as functions. */
5659 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5662 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5664 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
5665 elfsym->symbol.flags |= BSF_FUNCTION;
5669 /* Mangle thumb function symbols as we read them in. */
5672 elf32_arm_swap_symbol_in (bfd * abfd,
5675 Elf_Internal_Sym *dst)
5677 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
5679 /* New EABI objects mark thumb function symbols by setting the low bit of
5680 the address. Turn these into STT_ARM_TFUNC. */
5681 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
5682 && (dst->st_value & 1))
5684 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
5685 dst->st_value &= ~(bfd_vma) 1;
5690 /* Mangle thumb function symbols as we write them out. */
5693 elf32_arm_swap_symbol_out (bfd *abfd,
5694 const Elf_Internal_Sym *src,
5698 Elf_Internal_Sym newsym;
5700 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
5701 of the address set, as per the new EABI. We do this unconditionally
5702 because objcopy does not set the elf header flags until after
5703 it writes out the symbol table. */
5704 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
5707 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
5708 newsym.st_value |= 1;
5712 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
5715 /* Add the PT_ARM_EXIDX program header. */
5718 elf32_arm_modify_segment_map (bfd *abfd,
5719 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5721 struct elf_segment_map *m;
5724 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
5725 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5727 /* If there is already a PT_ARM_EXIDX header, then we do not
5728 want to add another one. This situation arises when running
5729 "strip"; the input binary already has the header. */
5730 m = elf_tdata (abfd)->segment_map;
5731 while (m && m->p_type != PT_ARM_EXIDX)
5735 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
5738 m->p_type = PT_ARM_EXIDX;
5740 m->sections[0] = sec;
5742 m->next = elf_tdata (abfd)->segment_map;
5743 elf_tdata (abfd)->segment_map = m;
5750 /* We may add a PT_ARM_EXIDX program header. */
5753 elf32_arm_additional_program_headers (bfd *abfd)
5757 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
5758 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5764 /* We use this to override swap_symbol_in and swap_symbol_out. */
5765 const struct elf_size_info elf32_arm_size_info = {
5766 sizeof (Elf32_External_Ehdr),
5767 sizeof (Elf32_External_Phdr),
5768 sizeof (Elf32_External_Shdr),
5769 sizeof (Elf32_External_Rel),
5770 sizeof (Elf32_External_Rela),
5771 sizeof (Elf32_External_Sym),
5772 sizeof (Elf32_External_Dyn),
5773 sizeof (Elf_External_Note),
5777 ELFCLASS32, EV_CURRENT,
5778 bfd_elf32_write_out_phdrs,
5779 bfd_elf32_write_shdrs_and_ehdr,
5780 bfd_elf32_write_relocs,
5781 elf32_arm_swap_symbol_in,
5782 elf32_arm_swap_symbol_out,
5783 bfd_elf32_slurp_reloc_table,
5784 bfd_elf32_slurp_symbol_table,
5785 bfd_elf32_swap_dyn_in,
5786 bfd_elf32_swap_dyn_out,
5787 bfd_elf32_swap_reloc_in,
5788 bfd_elf32_swap_reloc_out,
5789 bfd_elf32_swap_reloca_in,
5790 bfd_elf32_swap_reloca_out
5793 #define ELF_ARCH bfd_arch_arm
5794 #define ELF_MACHINE_CODE EM_ARM
5795 #ifdef __QNXTARGET__
5796 #define ELF_MAXPAGESIZE 0x1000
5798 #define ELF_MAXPAGESIZE 0x8000
5800 #define ELF_MINPAGESIZE 0x1000
5802 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5803 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
5804 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5805 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5806 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
5807 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
5808 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
5809 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
5810 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
5812 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5813 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5814 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5815 #define elf_backend_check_relocs elf32_arm_check_relocs
5816 #define elf_backend_relocate_section elf32_arm_relocate_section
5817 #define elf_backend_write_section elf32_arm_write_section
5818 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5819 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
5820 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5821 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
5822 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
5823 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
5824 #define elf_backend_post_process_headers elf32_arm_post_process_headers
5825 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
5826 #define elf_backend_object_p elf32_arm_object_p
5827 #define elf_backend_section_flags elf32_arm_section_flags
5828 #define elf_backend_fake_sections elf32_arm_fake_sections
5829 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
5830 #define elf_backend_final_write_processing elf32_arm_final_write_processing
5831 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
5832 #define elf_backend_symbol_processing elf32_arm_symbol_processing
5833 #define elf_backend_size_info elf32_arm_size_info
5834 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
5835 #define elf_backend_additional_program_headers \
5836 elf32_arm_additional_program_headers
5838 #define elf_backend_can_refcount 1
5839 #define elf_backend_can_gc_sections 1
5840 #define elf_backend_plt_readonly 1
5841 #define elf_backend_want_got_plt 1
5842 #define elf_backend_want_plt_sym 0
5843 #define elf_backend_may_use_rel_p 1
5844 #define elf_backend_may_use_rela_p 0
5845 #define elf_backend_default_use_rela_p 0
5846 #define elf_backend_rela_normal 0
5848 #define elf_backend_got_header_size 12
5850 #include "elf32-target.h"
5852 /* VxWorks Targets */
5854 #undef TARGET_LITTLE_SYM
5855 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
5856 #undef TARGET_LITTLE_NAME
5857 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
5858 #undef TARGET_BIG_SYM
5859 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
5860 #undef TARGET_BIG_NAME
5861 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
5863 /* Like elf32_arm_link_hash_table_create -- but overrides
5864 appropriately for VxWorks. */
5865 static struct bfd_link_hash_table *
5866 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
5868 struct bfd_link_hash_table *ret;
5870 ret = elf32_arm_link_hash_table_create (abfd);
5873 struct elf32_arm_link_hash_table *htab
5874 = (struct elf32_arm_link_hash_table *)ret;
5881 #define elf32_bed elf32_arm_vxworks_bed
5883 #undef bfd_elf32_bfd_link_hash_table_create
5884 #define bfd_elf32_bfd_link_hash_table_create \
5885 elf32_arm_vxworks_link_hash_table_create
5887 #undef elf_backend_may_use_rel_p
5888 #define elf_backend_may_use_rel_p 0
5889 #undef elf_backend_may_use_rela_p
5890 #define elf_backend_may_use_rela_p 1
5891 #undef elf_backend_default_use_rela_p
5892 #define elf_backend_default_use_rela_p 1
5893 #undef elf_backend_rela_normal
5894 #define elf_backend_rela_normal 1
5896 #include "elf32-target.h"
5899 /* Symbian OS Targets */
5901 #undef TARGET_LITTLE_SYM
5902 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5903 #undef TARGET_LITTLE_NAME
5904 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5905 #undef TARGET_BIG_SYM
5906 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5907 #undef TARGET_BIG_NAME
5908 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
5910 /* Like elf32_arm_link_hash_table_create -- but overrides
5911 appropriately for Symbian OS. */
5912 static struct bfd_link_hash_table *
5913 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
5915 struct bfd_link_hash_table *ret;
5917 ret = elf32_arm_link_hash_table_create (abfd);
5920 struct elf32_arm_link_hash_table *htab
5921 = (struct elf32_arm_link_hash_table *)ret;
5922 /* There is no PLT header for Symbian OS. */
5923 htab->plt_header_size = 0;
5924 /* The PLT entries are each three instructions. */
5925 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
5926 htab->symbian_p = 1;
5927 htab->root.is_relocatable_executable = 1;
5932 static struct bfd_elf_special_section const
5933 elf32_arm_symbian_special_sections[]=
5935 /* In a BPABI executable, the dynamic linking sections do not go in
5936 the loadable read-only segment. The post-linker may wish to
5937 refer to these sections, but they are not part of the final
5939 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
5940 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
5941 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
5942 { ".got", 4, 0, SHT_PROGBITS, 0 },
5943 { ".hash", 5, 0, SHT_HASH, 0 },
5944 /* These sections do not need to be writable as the SymbianOS
5945 postlinker will arrange things so that no dynamic relocation is
5947 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
5948 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
5949 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
5950 { NULL, 0, 0, 0, 0 }
5954 elf32_arm_symbian_begin_write_processing (bfd *abfd,
5955 struct bfd_link_info *link_info
5958 /* BPABI objects are never loaded directly by an OS kernel; they are
5959 processed by a postlinker first, into an OS-specific format. If
5960 the D_PAGED bit is set on the file, BFD will align segments on
5961 page boundaries, so that an OS can directly map the file. With
5962 BPABI objects, that just results in wasted space. In addition,
5963 because we clear the D_PAGED bit, map_sections_to_segments will
5964 recognize that the program headers should not be mapped into any
5965 loadable segment. */
5966 abfd->flags &= ~D_PAGED;
5970 elf32_arm_symbian_modify_segment_map (bfd *abfd,
5971 struct bfd_link_info *info)
5973 struct elf_segment_map *m;
5976 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5977 segment. However, because the .dynamic section is not marked
5978 with SEC_LOAD, the generic ELF code will not create such a
5980 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
5983 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
5984 m->next = elf_tdata (abfd)->segment_map;
5985 elf_tdata (abfd)->segment_map = m;
5988 /* Also call the generic arm routine. */
5989 return elf32_arm_modify_segment_map (abfd, info);
5993 #define elf32_bed elf32_arm_symbian_bed
5995 /* The dynamic sections are not allocated on SymbianOS; the postlinker
5996 will process them and then discard them. */
5997 #undef ELF_DYNAMIC_SEC_FLAGS
5998 #define ELF_DYNAMIC_SEC_FLAGS \
5999 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
6001 #undef bfd_elf32_bfd_link_hash_table_create
6002 #define bfd_elf32_bfd_link_hash_table_create \
6003 elf32_arm_symbian_link_hash_table_create
6005 #undef elf_backend_special_sections
6006 #define elf_backend_special_sections elf32_arm_symbian_special_sections
6008 #undef elf_backend_begin_write_processing
6009 #define elf_backend_begin_write_processing \
6010 elf32_arm_symbian_begin_write_processing
6012 #undef elf_backend_modify_segment_map
6013 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
6015 /* There is no .got section for BPABI objects, and hence no header. */
6016 #undef elf_backend_got_header_size
6017 #define elf_backend_got_header_size 0
6019 /* Similarly, there is no .got.plt section. */
6020 #undef elf_backend_want_got_plt
6021 #define elf_backend_want_got_plt 0
6023 #undef elf_backend_may_use_rel_p
6024 #define elf_backend_may_use_rel_p 1
6025 #undef elf_backend_may_use_rela_p
6026 #define elf_backend_may_use_rela_p 0
6027 #undef elf_backend_default_use_rela_p
6028 #define elf_backend_default_use_rela_p 0
6029 #undef elf_backend_rela_normal
6030 #define elf_backend_rela_normal 0
6032 #include "elf32-target.h"