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,
2246 bfd_boolean * unresolved_reloc_p)
2248 unsigned long r_type = howto->type;
2249 unsigned long r_symndx;
2250 bfd_byte * hit_data = contents + rel->r_offset;
2251 bfd * dynobj = NULL;
2252 Elf_Internal_Shdr * symtab_hdr;
2253 struct elf_link_hash_entry ** sym_hashes;
2254 bfd_vma * local_got_offsets;
2255 asection * sgot = NULL;
2256 asection * splt = NULL;
2257 asection * sreloc = NULL;
2259 bfd_signed_vma signed_addend;
2260 struct elf32_arm_link_hash_table * globals;
2262 globals = elf32_arm_hash_table (info);
2265 /* Some relocation type map to different relocations depending on the
2266 target. We pick the right one here. */
2267 r_type = arm_real_reloc_type (globals, r_type);
2268 if (r_type != howto->type)
2269 howto = elf32_arm_howto_from_type (r_type);
2270 #endif /* OLD_ARM_ABI */
2272 /* If the start address has been set, then set the EF_ARM_HASENTRY
2273 flag. Setting this more than once is redundant, but the cost is
2274 not too high, and it keeps the code simple.
2276 The test is done here, rather than somewhere else, because the
2277 start address is only set just before the final link commences.
2279 Note - if the user deliberately sets a start address of 0, the
2280 flag will not be set. */
2281 if (bfd_get_start_address (output_bfd) != 0)
2282 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2284 dynobj = elf_hash_table (info)->dynobj;
2287 sgot = bfd_get_section_by_name (dynobj, ".got");
2288 splt = bfd_get_section_by_name (dynobj, ".plt");
2290 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2291 sym_hashes = elf_sym_hashes (input_bfd);
2292 local_got_offsets = elf_local_got_offsets (input_bfd);
2293 r_symndx = ELF32_R_SYM (rel->r_info);
2295 if (globals->use_rel)
2297 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2299 if (addend & ((howto->src_mask + 1) >> 1))
2302 signed_addend &= ~ howto->src_mask;
2303 signed_addend |= addend;
2306 signed_addend = addend;
2309 addend = signed_addend = rel->r_addend;
2314 return bfd_reloc_ok;
2326 /* r_symndx will be zero only for relocs against symbols
2327 from removed linkonce sections, or sections discarded by
2330 return bfd_reloc_ok;
2332 /* Handle relocations which should use the PLT entry. ABS32/REL32
2333 will use the symbol's value, which may point to a PLT entry, but we
2334 don't need to handle that here. If we created a PLT entry, all
2335 branches in this object should go to it. */
2336 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2339 && h->plt.offset != (bfd_vma) -1)
2341 /* If we've created a .plt section, and assigned a PLT entry to
2342 this function, it should not be known to bind locally. If
2343 it were, we would have cleared the PLT entry. */
2344 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2346 value = (splt->output_section->vma
2347 + splt->output_offset
2349 *unresolved_reloc_p = FALSE;
2350 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2351 contents, rel->r_offset, value,
2355 /* When generating a shared object or relocatable executable, these
2356 relocations are copied into the output file to be resolved at
2358 if ((info->shared || globals->root.is_relocatable_executable)
2359 && (input_section->flags & SEC_ALLOC)
2360 && (r_type != R_ARM_REL32
2361 || !SYMBOL_CALLS_LOCAL (info, h))
2363 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2364 || h->root.type != bfd_link_hash_undefweak)
2365 && r_type != R_ARM_PC24
2367 && r_type != R_ARM_CALL
2368 && r_type != R_ARM_JUMP24
2369 && r_type != R_ARM_PREL31
2371 && r_type != R_ARM_PLT32)
2373 Elf_Internal_Rela outrel;
2375 bfd_boolean skip, relocate;
2377 *unresolved_reloc_p = FALSE;
2383 name = (bfd_elf_string_from_elf_section
2385 elf_elfheader (input_bfd)->e_shstrndx,
2386 elf_section_data (input_section)->rel_hdr.sh_name));
2388 return bfd_reloc_notsupported;
2390 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2391 && strcmp (bfd_get_section_name (input_bfd,
2395 sreloc = bfd_get_section_by_name (dynobj, name);
2396 BFD_ASSERT (sreloc != NULL);
2403 _bfd_elf_section_offset (output_bfd, info, input_section,
2405 if (outrel.r_offset == (bfd_vma) -1)
2407 else if (outrel.r_offset == (bfd_vma) -2)
2408 skip = TRUE, relocate = TRUE;
2409 outrel.r_offset += (input_section->output_section->vma
2410 + input_section->output_offset);
2413 memset (&outrel, 0, sizeof outrel);
2418 || !h->def_regular))
2419 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2424 /* This symbol is local, or marked to become local. */
2426 if (sym_flags == STT_ARM_TFUNC)
2428 if (globals->symbian_p)
2430 /* On Symbian OS, the data segment and text segement
2431 can be relocated independently. Therefore, we
2432 must indicate the segment to which this
2433 relocation is relative. The BPABI allows us to
2434 use any symbol in the right segment; we just use
2435 the section symbol as it is convenient. (We
2436 cannot use the symbol given by "h" directly as it
2437 will not appear in the dynamic symbol table.) */
2438 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2439 BFD_ASSERT (symbol != 0);
2442 /* On SVR4-ish systems, the dynamic loader cannot
2443 relocate the text and data segments independently,
2444 so the symbol does not matter. */
2446 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2449 loc = sreloc->contents;
2450 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2451 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2453 /* If this reloc is against an external symbol, we do not want to
2454 fiddle with the addend. Otherwise, we need to include the symbol
2455 value so that it becomes an addend for the dynamic reloc. */
2457 return bfd_reloc_ok;
2459 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2460 contents, rel->r_offset, value,
2463 else switch (r_type)
2466 case R_ARM_XPC25: /* Arm BLX instruction. */
2470 case R_ARM_PC24: /* Arm B/BL instruction */
2473 if (r_type == R_ARM_XPC25)
2475 /* Check for Arm calling Arm function. */
2476 /* FIXME: Should we translate the instruction into a BL
2477 instruction instead ? */
2478 if (sym_flags != STT_ARM_TFUNC)
2479 (*_bfd_error_handler)
2480 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2482 h ? h->root.root.string : "(local)");
2487 /* Check for Arm calling Thumb function. */
2488 if (sym_flags == STT_ARM_TFUNC)
2490 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2491 output_bfd, input_section,
2492 hit_data, sym_sec, rel->r_offset,
2493 signed_addend, value);
2494 return bfd_reloc_ok;
2498 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2500 S is the address of the symbol in the relocation.
2501 P is address of the instruction being relocated.
2502 A is the addend (extracted from the instruction) in bytes.
2504 S is held in 'value'.
2505 P is the base address of the section containing the
2506 instruction plus the offset of the reloc into that
2508 (input_section->output_section->vma +
2509 input_section->output_offset +
2511 A is the addend, converted into bytes, ie:
2514 Note: None of these operations have knowledge of the pipeline
2515 size of the processor, thus it is up to the assembler to
2516 encode this information into the addend. */
2517 value -= (input_section->output_section->vma
2518 + input_section->output_offset);
2519 value -= rel->r_offset;
2520 if (globals->use_rel)
2521 value += (signed_addend << howto->size);
2523 /* RELA addends do not have to be adjusted by howto->size. */
2524 value += signed_addend;
2526 signed_addend = value;
2527 signed_addend >>= howto->rightshift;
2529 /* It is not an error for an undefined weak reference to be
2530 out of range. Any program that branches to such a symbol
2531 is going to crash anyway, so there is no point worrying
2532 about getting the destination exactly right. */
2533 if (! h || h->root.type != bfd_link_hash_undefweak)
2535 /* Perform a signed range check. */
2536 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2537 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2538 return bfd_reloc_overflow;
2542 /* If necessary set the H bit in the BLX instruction. */
2543 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2544 value = (signed_addend & howto->dst_mask)
2545 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2549 value = (signed_addend & howto->dst_mask)
2550 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2555 if (sym_flags == STT_ARM_TFUNC)
2560 value -= (input_section->output_section->vma
2561 + input_section->output_offset + rel->r_offset);
2567 value -= (input_section->output_section->vma
2568 + input_section->output_offset + rel->r_offset);
2569 value += signed_addend;
2570 if (! h || h->root.type != bfd_link_hash_undefweak)
2572 /* Check for overflow */
2573 if ((value ^ (value >> 1)) & (1 << 30))
2574 return bfd_reloc_overflow;
2576 value &= 0x7fffffff;
2577 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2578 if (sym_flags == STT_ARM_TFUNC)
2584 bfd_put_32 (input_bfd, value, hit_data);
2585 return bfd_reloc_ok;
2589 if ((long) value > 0x7f || (long) value < -0x80)
2590 return bfd_reloc_overflow;
2592 bfd_put_8 (input_bfd, value, hit_data);
2593 return bfd_reloc_ok;
2598 if ((long) value > 0x7fff || (long) value < -0x8000)
2599 return bfd_reloc_overflow;
2601 bfd_put_16 (input_bfd, value, hit_data);
2602 return bfd_reloc_ok;
2605 /* Support ldr and str instruction for the arm */
2606 /* Also thumb b (unconditional branch). ??? Really? */
2609 if ((long) value > 0x7ff || (long) value < -0x800)
2610 return bfd_reloc_overflow;
2612 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2613 bfd_put_32 (input_bfd, value, hit_data);
2614 return bfd_reloc_ok;
2616 case R_ARM_THM_ABS5:
2617 /* Support ldr and str instructions for the thumb. */
2618 if (globals->use_rel)
2620 /* Need to refetch addend. */
2621 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2622 /* ??? Need to determine shift amount from operand size. */
2623 addend >>= howto->rightshift;
2627 /* ??? Isn't value unsigned? */
2628 if ((long) value > 0x1f || (long) value < -0x10)
2629 return bfd_reloc_overflow;
2631 /* ??? Value needs to be properly shifted into place first. */
2632 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2633 bfd_put_16 (input_bfd, value, hit_data);
2634 return bfd_reloc_ok;
2637 case R_ARM_THM_XPC22:
2639 case R_ARM_THM_PC22:
2640 /* Thumb BL (branch long instruction). */
2643 bfd_boolean overflow = FALSE;
2644 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2645 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2646 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2647 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2649 bfd_signed_vma signed_check;
2651 /* Need to refetch the addend and squish the two 11 bit pieces
2653 if (globals->use_rel)
2655 bfd_vma upper = upper_insn & 0x7ff;
2656 bfd_vma lower = lower_insn & 0x7ff;
2657 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2658 addend = (upper << 12) | (lower << 1);
2659 signed_addend = addend;
2662 if (r_type == R_ARM_THM_XPC22)
2664 /* Check for Thumb to Thumb call. */
2665 /* FIXME: Should we translate the instruction into a BL
2666 instruction instead ? */
2667 if (sym_flags == STT_ARM_TFUNC)
2668 (*_bfd_error_handler)
2669 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2671 h ? h->root.root.string : "(local)");
2676 /* If it is not a call to Thumb, assume call to Arm.
2677 If it is a call relative to a section name, then it is not a
2678 function call at all, but rather a long jump. Calls through
2679 the PLT do not require stubs. */
2680 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2681 && (h == NULL || splt == NULL
2682 || h->plt.offset == (bfd_vma) -1))
2684 if (elf32_thumb_to_arm_stub
2685 (info, sym_name, input_bfd, output_bfd, input_section,
2686 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2687 return bfd_reloc_ok;
2689 return bfd_reloc_dangerous;
2693 /* Handle calls via the PLT. */
2694 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2696 value = (splt->output_section->vma
2697 + splt->output_offset
2699 /* Target the Thumb stub before the ARM PLT entry. */
2701 *unresolved_reloc_p = FALSE;
2704 relocation = value + signed_addend;
2706 relocation -= (input_section->output_section->vma
2707 + input_section->output_offset
2710 check = relocation >> howto->rightshift;
2712 /* If this is a signed value, the rightshift just dropped
2713 leading 1 bits (assuming twos complement). */
2714 if ((bfd_signed_vma) relocation >= 0)
2715 signed_check = check;
2717 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2719 /* Assumes two's complement. */
2720 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2724 if (r_type == R_ARM_THM_XPC22
2725 && ((lower_insn & 0x1800) == 0x0800))
2726 /* For a BLX instruction, make sure that the relocation is rounded up
2727 to a word boundary. This follows the semantics of the instruction
2728 which specifies that bit 1 of the target address will come from bit
2729 1 of the base address. */
2730 relocation = (relocation + 2) & ~ 3;
2732 /* Put RELOCATION back into the insn. */
2733 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
2734 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
2736 /* Put the relocated value back in the object file: */
2737 bfd_put_16 (input_bfd, upper_insn, hit_data);
2738 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
2740 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
2744 case R_ARM_THM_PC11:
2746 /* Thumb B (branch) instruction). */
2748 bfd_signed_vma relocation;
2749 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
2750 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2751 bfd_signed_vma signed_check;
2753 if (globals->use_rel)
2755 /* Need to refetch addend. */
2756 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2757 if (addend & ((howto->src_mask + 1) >> 1))
2760 signed_addend &= ~ howto->src_mask;
2761 signed_addend |= addend;
2764 signed_addend = addend;
2765 /* The value in the insn has been right shifted. We need to
2766 undo this, so that we can perform the address calculation
2767 in terms of bytes. */
2768 signed_addend <<= howto->rightshift;
2770 relocation = value + signed_addend;
2772 relocation -= (input_section->output_section->vma
2773 + input_section->output_offset
2776 relocation >>= howto->rightshift;
2777 signed_check = relocation;
2778 relocation &= howto->dst_mask;
2779 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
2781 bfd_put_16 (input_bfd, relocation, hit_data);
2783 /* Assumes two's complement. */
2784 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2785 return bfd_reloc_overflow;
2787 return bfd_reloc_ok;
2791 case R_ARM_ALU_PCREL7_0:
2792 case R_ARM_ALU_PCREL15_8:
2793 case R_ARM_ALU_PCREL23_15:
2798 insn = bfd_get_32 (input_bfd, hit_data);
2799 if (globals->use_rel)
2801 /* Extract the addend. */
2802 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
2803 signed_addend = addend;
2805 relocation = value + signed_addend;
2807 relocation -= (input_section->output_section->vma
2808 + input_section->output_offset
2810 insn = (insn & ~0xfff)
2811 | ((howto->bitpos << 7) & 0xf00)
2812 | ((relocation >> howto->bitpos) & 0xff);
2813 bfd_put_32 (input_bfd, value, hit_data);
2815 return bfd_reloc_ok;
2818 case R_ARM_GNU_VTINHERIT:
2819 case R_ARM_GNU_VTENTRY:
2820 return bfd_reloc_ok;
2823 return bfd_reloc_notsupported;
2825 case R_ARM_GLOB_DAT:
2826 return bfd_reloc_notsupported;
2828 case R_ARM_JUMP_SLOT:
2829 return bfd_reloc_notsupported;
2831 case R_ARM_RELATIVE:
2832 return bfd_reloc_notsupported;
2835 /* Relocation is relative to the start of the
2836 global offset table. */
2838 BFD_ASSERT (sgot != NULL);
2840 return bfd_reloc_notsupported;
2842 /* If we are addressing a Thumb function, we need to adjust the
2843 address by one, so that attempts to call the function pointer will
2844 correctly interpret it as Thumb code. */
2845 if (sym_flags == STT_ARM_TFUNC)
2848 /* Note that sgot->output_offset is not involved in this
2849 calculation. We always want the start of .got. If we
2850 define _GLOBAL_OFFSET_TABLE in a different way, as is
2851 permitted by the ABI, we might have to change this
2853 value -= sgot->output_section->vma;
2854 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2855 contents, rel->r_offset, value,
2859 /* Use global offset table as symbol value. */
2860 BFD_ASSERT (sgot != NULL);
2863 return bfd_reloc_notsupported;
2865 *unresolved_reloc_p = FALSE;
2866 value = sgot->output_section->vma;
2867 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2868 contents, rel->r_offset, value,
2873 case R_ARM_GOT_PREL:
2875 /* Relocation is to the entry for this symbol in the
2876 global offset table. */
2878 return bfd_reloc_notsupported;
2885 off = h->got.offset;
2886 BFD_ASSERT (off != (bfd_vma) -1);
2887 dyn = globals->root.dynamic_sections_created;
2889 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2891 && SYMBOL_REFERENCES_LOCAL (info, h))
2892 || (ELF_ST_VISIBILITY (h->other)
2893 && h->root.type == bfd_link_hash_undefweak))
2895 /* This is actually a static link, or it is a -Bsymbolic link
2896 and the symbol is defined locally. We must initialize this
2897 entry in the global offset table. Since the offset must
2898 always be a multiple of 4, we use the least significant bit
2899 to record whether we have initialized it already.
2901 When doing a dynamic link, we create a .rel.got relocation
2902 entry to initialize the value. This is done in the
2903 finish_dynamic_symbol routine. */
2908 /* If we are addressing a Thumb function, we need to
2909 adjust the address by one, so that attempts to
2910 call the function pointer will correctly
2911 interpret it as Thumb code. */
2912 if (sym_flags == STT_ARM_TFUNC)
2915 bfd_put_32 (output_bfd, value, sgot->contents + off);
2920 *unresolved_reloc_p = FALSE;
2922 value = sgot->output_offset + off;
2928 BFD_ASSERT (local_got_offsets != NULL &&
2929 local_got_offsets[r_symndx] != (bfd_vma) -1);
2931 off = local_got_offsets[r_symndx];
2933 /* The offset must always be a multiple of 4. We use the
2934 least significant bit to record whether we have already
2935 generated the necessary reloc. */
2940 /* If we are addressing a Thumb function, we need to
2941 adjust the address by one, so that attempts to
2942 call the function pointer will correctly
2943 interpret it as Thumb code. */
2944 if (sym_flags == STT_ARM_TFUNC)
2947 bfd_put_32 (output_bfd, value, sgot->contents + off);
2952 Elf_Internal_Rela outrel;
2955 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2956 BFD_ASSERT (srelgot != NULL);
2958 outrel.r_offset = (sgot->output_section->vma
2959 + sgot->output_offset
2961 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2962 loc = srelgot->contents;
2963 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2964 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2967 local_got_offsets[r_symndx] |= 1;
2970 value = sgot->output_offset + off;
2972 if (r_type != R_ARM_GOT32)
2973 value += sgot->output_section->vma;
2975 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2976 contents, rel->r_offset, value,
2980 return bfd_reloc_notsupported;
2982 case R_ARM_AMP_VCALL9:
2983 return bfd_reloc_notsupported;
2985 case R_ARM_RSBREL32:
2986 return bfd_reloc_notsupported;
2988 case R_ARM_THM_RPC22:
2989 return bfd_reloc_notsupported;
2992 return bfd_reloc_notsupported;
2995 return bfd_reloc_notsupported;
2998 return bfd_reloc_notsupported;
3001 return bfd_reloc_notsupported;
3004 if (globals->fix_v4bx)
3006 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
3008 /* Ensure that we have a BX instruction. */
3009 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3011 /* Preserve Rm (lowest four bits) and the condition code
3012 (highest four bits). Other bits encode MOV PC,Rm. */
3013 insn = (insn & 0xf000000f) | 0x01a0f000;
3015 bfd_put_32 (input_bfd, insn, hit_data);
3017 return bfd_reloc_ok;
3020 return bfd_reloc_notsupported;
3024 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3026 arm_add_to_rel (bfd * abfd,
3028 reloc_howto_type * howto,
3029 bfd_signed_vma increment)
3031 bfd_signed_vma addend;
3033 if (howto->type == R_ARM_THM_PC22)
3035 int upper_insn, lower_insn;
3038 upper_insn = bfd_get_16 (abfd, address);
3039 lower_insn = bfd_get_16 (abfd, address + 2);
3040 upper = upper_insn & 0x7ff;
3041 lower = lower_insn & 0x7ff;
3043 addend = (upper << 12) | (lower << 1);
3044 addend += increment;
3047 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3048 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3050 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3051 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3057 contents = bfd_get_32 (abfd, address);
3059 /* Get the (signed) value from the instruction. */
3060 addend = contents & howto->src_mask;
3061 if (addend & ((howto->src_mask + 1) >> 1))
3063 bfd_signed_vma mask;
3066 mask &= ~ howto->src_mask;
3070 /* Add in the increment, (which is a byte value). */
3071 switch (howto->type)
3074 addend += increment;
3082 addend <<= howto->size;
3083 addend += increment;
3085 /* Should we check for overflow here ? */
3087 /* Drop any undesired bits. */
3088 addend >>= howto->rightshift;
3092 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3094 bfd_put_32 (abfd, contents, address);
3098 /* Relocate an ARM ELF section. */
3100 elf32_arm_relocate_section (bfd * output_bfd,
3101 struct bfd_link_info * info,
3103 asection * input_section,
3104 bfd_byte * contents,
3105 Elf_Internal_Rela * relocs,
3106 Elf_Internal_Sym * local_syms,
3107 asection ** local_sections)
3109 Elf_Internal_Shdr *symtab_hdr;
3110 struct elf_link_hash_entry **sym_hashes;
3111 Elf_Internal_Rela *rel;
3112 Elf_Internal_Rela *relend;
3114 struct elf32_arm_link_hash_table * globals;
3116 globals = elf32_arm_hash_table (info);
3117 if (info->relocatable && !globals->use_rel)
3120 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3121 sym_hashes = elf_sym_hashes (input_bfd);
3124 relend = relocs + input_section->reloc_count;
3125 for (; rel < relend; rel++)
3128 reloc_howto_type * howto;
3129 unsigned long r_symndx;
3130 Elf_Internal_Sym * sym;
3132 struct elf_link_hash_entry * h;
3134 bfd_reloc_status_type r;
3136 bfd_boolean unresolved_reloc = FALSE;
3138 r_symndx = ELF32_R_SYM (rel->r_info);
3139 r_type = ELF32_R_TYPE (rel->r_info);
3140 r_type = arm_real_reloc_type (globals, r_type);
3142 if ( r_type == R_ARM_GNU_VTENTRY
3143 || r_type == R_ARM_GNU_VTINHERIT)
3146 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3147 howto = bfd_reloc.howto;
3149 if (info->relocatable && globals->use_rel)
3151 /* This is a relocatable link. We don't have to change
3152 anything, unless the reloc is against a section symbol,
3153 in which case we have to adjust according to where the
3154 section symbol winds up in the output section. */
3155 if (r_symndx < symtab_hdr->sh_info)
3157 sym = local_syms + r_symndx;
3158 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3160 sec = local_sections[r_symndx];
3161 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3163 (bfd_signed_vma) (sec->output_offset
3171 /* This is a final link. */
3176 if (r_symndx < symtab_hdr->sh_info)
3178 sym = local_syms + r_symndx;
3179 sec = local_sections[r_symndx];
3180 if (globals->use_rel)
3182 relocation = (sec->output_section->vma
3183 + sec->output_offset
3185 if ((sec->flags & SEC_MERGE)
3186 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3189 bfd_vma addend, value;
3191 if (howto->rightshift)
3193 (*_bfd_error_handler)
3194 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3195 input_bfd, input_section,
3196 (long) rel->r_offset, howto->name);
3200 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3202 /* Get the (signed) value from the instruction. */
3203 addend = value & howto->src_mask;
3204 if (addend & ((howto->src_mask + 1) >> 1))
3206 bfd_signed_vma mask;
3209 mask &= ~ howto->src_mask;
3214 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3216 addend += msec->output_section->vma + msec->output_offset;
3217 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3218 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3222 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3228 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3229 r_symndx, symtab_hdr, sym_hashes,
3231 unresolved_reloc, warned);
3235 name = h->root.root.string;
3238 name = (bfd_elf_string_from_elf_section
3239 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3240 if (name == NULL || *name == '\0')
3241 name = bfd_section_name (input_bfd, sec);
3244 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3245 input_section, contents, rel,
3246 relocation, info, sec, name,
3247 (h ? ELF_ST_TYPE (h->type) :
3248 ELF_ST_TYPE (sym->st_info)), h,
3251 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3252 because such sections are not SEC_ALLOC and thus ld.so will
3253 not process them. */
3254 if (unresolved_reloc
3255 && !((input_section->flags & SEC_DEBUGGING) != 0
3258 (*_bfd_error_handler)
3259 (_("%B(%A+0x%lx): warning: unresolvable relocation %d against symbol `%s'"),
3260 input_bfd, input_section, (long) rel->r_offset,
3261 r_type, h->root.root.string);
3265 if (r != bfd_reloc_ok)
3267 const char * msg = (const char *) 0;
3271 case bfd_reloc_overflow:
3272 /* If the overflowing reloc was to an undefined symbol,
3273 we have already printed one error message and there
3274 is no point complaining again. */
3276 h->root.type != bfd_link_hash_undefined)
3277 && (!((*info->callbacks->reloc_overflow)
3278 (info, (h ? &h->root : NULL), name, howto->name,
3279 (bfd_vma) 0, input_bfd, input_section,
3284 case bfd_reloc_undefined:
3285 if (!((*info->callbacks->undefined_symbol)
3286 (info, name, input_bfd, input_section,
3287 rel->r_offset, TRUE)))
3291 case bfd_reloc_outofrange:
3292 msg = _("internal error: out of range error");
3295 case bfd_reloc_notsupported:
3296 msg = _("internal error: unsupported relocation error");
3299 case bfd_reloc_dangerous:
3300 msg = _("internal error: dangerous error");
3304 msg = _("internal error: unknown error");
3308 if (!((*info->callbacks->warning)
3309 (info, msg, name, input_bfd, input_section,
3320 /* Set the right machine number. */
3323 elf32_arm_object_p (bfd *abfd)
3327 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3329 if (mach != bfd_mach_arm_unknown)
3330 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3332 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3333 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3336 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3341 /* Function to keep ARM specific flags in the ELF header. */
3344 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3346 if (elf_flags_init (abfd)
3347 && elf_elfheader (abfd)->e_flags != flags)
3349 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3351 if (flags & EF_ARM_INTERWORK)
3352 (*_bfd_error_handler)
3353 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3357 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3363 elf_elfheader (abfd)->e_flags = flags;
3364 elf_flags_init (abfd) = TRUE;
3370 /* Copy backend specific data from one object module to another. */
3373 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3378 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3379 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3382 in_flags = elf_elfheader (ibfd)->e_flags;
3383 out_flags = elf_elfheader (obfd)->e_flags;
3385 if (elf_flags_init (obfd)
3386 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3387 && in_flags != out_flags)
3389 /* Cannot mix APCS26 and APCS32 code. */
3390 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3393 /* Cannot mix float APCS and non-float APCS code. */
3394 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3397 /* If the src and dest have different interworking flags
3398 then turn off the interworking bit. */
3399 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3401 if (out_flags & EF_ARM_INTERWORK)
3403 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3406 in_flags &= ~EF_ARM_INTERWORK;
3409 /* Likewise for PIC, though don't warn for this case. */
3410 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3411 in_flags &= ~EF_ARM_PIC;
3414 elf_elfheader (obfd)->e_flags = in_flags;
3415 elf_flags_init (obfd) = TRUE;
3417 /* Also copy the EI_OSABI field. */
3418 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3419 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3424 /* Merge backend specific data from an object file to the output
3425 object file when linking. */
3428 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3432 bfd_boolean flags_compatible = TRUE;
3435 /* Check if we have the same endianess. */
3436 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3439 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3440 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3443 /* The input BFD must have had its flags initialised. */
3444 /* The following seems bogus to me -- The flags are initialized in
3445 the assembler but I don't think an elf_flags_init field is
3446 written into the object. */
3447 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3449 in_flags = elf_elfheader (ibfd)->e_flags;
3450 out_flags = elf_elfheader (obfd)->e_flags;
3452 if (!elf_flags_init (obfd))
3454 /* If the input is the default architecture and had the default
3455 flags then do not bother setting the flags for the output
3456 architecture, instead allow future merges to do this. If no
3457 future merges ever set these flags then they will retain their
3458 uninitialised values, which surprise surprise, correspond
3459 to the default values. */
3460 if (bfd_get_arch_info (ibfd)->the_default
3461 && elf_elfheader (ibfd)->e_flags == 0)
3464 elf_flags_init (obfd) = TRUE;
3465 elf_elfheader (obfd)->e_flags = in_flags;
3467 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3468 && bfd_get_arch_info (obfd)->the_default)
3469 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3474 /* Determine what should happen if the input ARM architecture
3475 does not match the output ARM architecture. */
3476 if (! bfd_arm_merge_machines (ibfd, obfd))
3479 /* Identical flags must be compatible. */
3480 if (in_flags == out_flags)
3483 /* Check to see if the input BFD actually contains any sections. If
3484 not, its flags may not have been initialised either, but it
3485 cannot actually cause any incompatibility. Do not short-circuit
3486 dynamic objects; their section list may be emptied by
3487 elf_link_add_object_symbols.
3489 Also check to see if there are no code sections in the input.
3490 In this case there is no need to check for code specific flags.
3491 XXX - do we need to worry about floating-point format compatability
3492 in data sections ? */
3493 if (!(ibfd->flags & DYNAMIC))
3495 bfd_boolean null_input_bfd = TRUE;
3496 bfd_boolean only_data_sections = TRUE;
3498 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3500 /* Ignore synthetic glue sections. */
3501 if (strcmp (sec->name, ".glue_7")
3502 && strcmp (sec->name, ".glue_7t"))
3504 if ((bfd_get_section_flags (ibfd, sec)
3505 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3506 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3507 only_data_sections = FALSE;
3509 null_input_bfd = FALSE;
3514 if (null_input_bfd || only_data_sections)
3518 /* Complain about various flag mismatches. */
3519 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
3522 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
3524 (in_flags & EF_ARM_EABIMASK) >> 24,
3525 (out_flags & EF_ARM_EABIMASK) >> 24);
3529 /* Not sure what needs to be checked for EABI versions >= 1. */
3530 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
3532 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3535 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3537 in_flags & EF_ARM_APCS_26 ? 26 : 32,
3538 out_flags & EF_ARM_APCS_26 ? 26 : 32);
3539 flags_compatible = FALSE;
3542 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3544 if (in_flags & EF_ARM_APCS_FLOAT)
3546 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3550 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3553 flags_compatible = FALSE;
3556 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
3558 if (in_flags & EF_ARM_VFP_FLOAT)
3560 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3564 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3567 flags_compatible = FALSE;
3570 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
3572 if (in_flags & EF_ARM_MAVERICK_FLOAT)
3574 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3578 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3581 flags_compatible = FALSE;
3584 #ifdef EF_ARM_SOFT_FLOAT
3585 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
3587 /* We can allow interworking between code that is VFP format
3588 layout, and uses either soft float or integer regs for
3589 passing floating point arguments and results. We already
3590 know that the APCS_FLOAT flags match; similarly for VFP
3592 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
3593 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
3595 if (in_flags & EF_ARM_SOFT_FLOAT)
3597 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3601 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3604 flags_compatible = FALSE;
3609 /* Interworking mismatch is only a warning. */
3610 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3612 if (in_flags & EF_ARM_INTERWORK)
3615 (_("Warning: %B supports interworking, whereas %B does not"),
3621 (_("Warning: %B does not support interworking, whereas %B does"),
3627 return flags_compatible;
3630 /* Display the flags field. */
3633 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
3635 FILE * file = (FILE *) ptr;
3636 unsigned long flags;
3638 BFD_ASSERT (abfd != NULL && ptr != NULL);
3640 /* Print normal ELF private data. */
3641 _bfd_elf_print_private_bfd_data (abfd, ptr);
3643 flags = elf_elfheader (abfd)->e_flags;
3644 /* Ignore init flag - it may not be set, despite the flags field
3645 containing valid data. */
3647 /* xgettext:c-format */
3648 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3650 switch (EF_ARM_EABI_VERSION (flags))
3652 case EF_ARM_EABI_UNKNOWN:
3653 /* The following flag bits are GNU extensions and not part of the
3654 official ARM ELF extended ABI. Hence they are only decoded if
3655 the EABI version is not set. */
3656 if (flags & EF_ARM_INTERWORK)
3657 fprintf (file, _(" [interworking enabled]"));
3659 if (flags & EF_ARM_APCS_26)
3660 fprintf (file, " [APCS-26]");
3662 fprintf (file, " [APCS-32]");
3664 if (flags & EF_ARM_VFP_FLOAT)
3665 fprintf (file, _(" [VFP float format]"));
3666 else if (flags & EF_ARM_MAVERICK_FLOAT)
3667 fprintf (file, _(" [Maverick float format]"));
3669 fprintf (file, _(" [FPA float format]"));
3671 if (flags & EF_ARM_APCS_FLOAT)
3672 fprintf (file, _(" [floats passed in float registers]"));
3674 if (flags & EF_ARM_PIC)
3675 fprintf (file, _(" [position independent]"));
3677 if (flags & EF_ARM_NEW_ABI)
3678 fprintf (file, _(" [new ABI]"));
3680 if (flags & EF_ARM_OLD_ABI)
3681 fprintf (file, _(" [old ABI]"));
3683 if (flags & EF_ARM_SOFT_FLOAT)
3684 fprintf (file, _(" [software FP]"));
3686 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
3687 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
3688 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
3689 | EF_ARM_MAVERICK_FLOAT);
3692 case EF_ARM_EABI_VER1:
3693 fprintf (file, _(" [Version1 EABI]"));
3695 if (flags & EF_ARM_SYMSARESORTED)
3696 fprintf (file, _(" [sorted symbol table]"));
3698 fprintf (file, _(" [unsorted symbol table]"));
3700 flags &= ~ EF_ARM_SYMSARESORTED;
3703 case EF_ARM_EABI_VER2:
3704 fprintf (file, _(" [Version2 EABI]"));
3706 if (flags & EF_ARM_SYMSARESORTED)
3707 fprintf (file, _(" [sorted symbol table]"));
3709 fprintf (file, _(" [unsorted symbol table]"));
3711 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
3712 fprintf (file, _(" [dynamic symbols use segment index]"));
3714 if (flags & EF_ARM_MAPSYMSFIRST)
3715 fprintf (file, _(" [mapping symbols precede others]"));
3717 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
3718 | EF_ARM_MAPSYMSFIRST);
3721 case EF_ARM_EABI_VER3:
3722 fprintf (file, _(" [Version3 EABI]"));
3725 case EF_ARM_EABI_VER4:
3726 fprintf (file, _(" [Version4 EABI]"));
3728 if (flags & EF_ARM_BE8)
3729 fprintf (file, _(" [BE8]"));
3731 if (flags & EF_ARM_LE8)
3732 fprintf (file, _(" [LE8]"));
3734 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
3738 fprintf (file, _(" <EABI version unrecognised>"));
3742 flags &= ~ EF_ARM_EABIMASK;
3744 if (flags & EF_ARM_RELEXEC)
3745 fprintf (file, _(" [relocatable executable]"));
3747 if (flags & EF_ARM_HASENTRY)
3748 fprintf (file, _(" [has entry point]"));
3750 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
3753 fprintf (file, _("<Unrecognised flag bits set>"));
3761 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
3763 switch (ELF_ST_TYPE (elf_sym->st_info))
3766 return ELF_ST_TYPE (elf_sym->st_info);
3769 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3770 This allows us to distinguish between data used by Thumb instructions
3771 and non-data (which is probably code) inside Thumb regions of an
3773 if (type != STT_OBJECT)
3774 return ELF_ST_TYPE (elf_sym->st_info);
3785 elf32_arm_gc_mark_hook (asection * sec,
3786 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3787 Elf_Internal_Rela * rel,
3788 struct elf_link_hash_entry * h,
3789 Elf_Internal_Sym * sym)
3793 switch (ELF32_R_TYPE (rel->r_info))
3795 case R_ARM_GNU_VTINHERIT:
3796 case R_ARM_GNU_VTENTRY:
3800 switch (h->root.type)
3802 case bfd_link_hash_defined:
3803 case bfd_link_hash_defweak:
3804 return h->root.u.def.section;
3806 case bfd_link_hash_common:
3807 return h->root.u.c.p->section;
3815 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3820 /* Update the got entry reference counts for the section being removed. */
3823 elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
3824 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3825 asection * sec ATTRIBUTE_UNUSED,
3826 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
3828 Elf_Internal_Shdr *symtab_hdr;
3829 struct elf_link_hash_entry **sym_hashes;
3830 bfd_signed_vma *local_got_refcounts;
3831 const Elf_Internal_Rela *rel, *relend;
3832 struct elf32_arm_link_hash_table * globals;
3834 globals = elf32_arm_hash_table (info);
3836 elf_section_data (sec)->local_dynrel = NULL;
3838 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3839 sym_hashes = elf_sym_hashes (abfd);
3840 local_got_refcounts = elf_local_got_refcounts (abfd);
3842 relend = relocs + sec->reloc_count;
3843 for (rel = relocs; rel < relend; rel++)
3845 unsigned long r_symndx;
3846 struct elf_link_hash_entry *h = NULL;
3849 r_symndx = ELF32_R_SYM (rel->r_info);
3850 if (r_symndx >= symtab_hdr->sh_info)
3852 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3853 while (h->root.type == bfd_link_hash_indirect
3854 || h->root.type == bfd_link_hash_warning)
3855 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3858 r_type = ELF32_R_TYPE (rel->r_info);
3860 r_type = arm_real_reloc_type (globals, r_type);
3866 case R_ARM_GOT_PREL:
3870 if (h->got.refcount > 0)
3871 h->got.refcount -= 1;
3873 else if (local_got_refcounts != NULL)
3875 if (local_got_refcounts[r_symndx] > 0)
3876 local_got_refcounts[r_symndx] -= 1;
3889 case R_ARM_THM_PC22:
3890 /* Should the interworking branches be here also? */
3894 struct elf32_arm_link_hash_entry *eh;
3895 struct elf32_arm_relocs_copied **pp;
3896 struct elf32_arm_relocs_copied *p;
3898 eh = (struct elf32_arm_link_hash_entry *) h;
3900 if (h->plt.refcount > 0)
3902 h->plt.refcount -= 1;
3903 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
3904 eh->plt_thumb_refcount--;
3907 if (r_type == R_ARM_ABS32
3908 || r_type == R_ARM_REL32)
3910 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
3912 if (p->section == sec)
3931 /* Look through the relocs for a section during the first phase. */
3934 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
3935 asection *sec, const Elf_Internal_Rela *relocs)
3937 Elf_Internal_Shdr *symtab_hdr;
3938 struct elf_link_hash_entry **sym_hashes;
3939 struct elf_link_hash_entry **sym_hashes_end;
3940 const Elf_Internal_Rela *rel;
3941 const Elf_Internal_Rela *rel_end;
3944 bfd_vma *local_got_offsets;
3945 struct elf32_arm_link_hash_table *htab;
3947 if (info->relocatable)
3950 htab = elf32_arm_hash_table (info);
3953 /* Create dynamic sections for relocatable executables so that we can
3954 copy relocations. */
3955 if (htab->root.is_relocatable_executable
3956 && ! htab->root.dynamic_sections_created)
3958 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
3962 dynobj = elf_hash_table (info)->dynobj;
3963 local_got_offsets = elf_local_got_offsets (abfd);
3965 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3966 sym_hashes = elf_sym_hashes (abfd);
3967 sym_hashes_end = sym_hashes
3968 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
3970 if (!elf_bad_symtab (abfd))
3971 sym_hashes_end -= symtab_hdr->sh_info;
3973 rel_end = relocs + sec->reloc_count;
3974 for (rel = relocs; rel < rel_end; rel++)
3976 struct elf_link_hash_entry *h;
3977 struct elf32_arm_link_hash_entry *eh;
3978 unsigned long r_symndx;
3981 r_symndx = ELF32_R_SYM (rel->r_info);
3982 r_type = ELF32_R_TYPE (rel->r_info);
3984 r_type = arm_real_reloc_type (htab, r_type);
3986 if (r_symndx < symtab_hdr->sh_info)
3989 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3991 eh = (struct elf32_arm_link_hash_entry *) h;
3997 case R_ARM_GOT_PREL:
3999 /* This symbol requires a global offset table entry. */
4006 bfd_signed_vma *local_got_refcounts;
4008 /* This is a global offset table entry for a local symbol. */
4009 local_got_refcounts = elf_local_got_refcounts (abfd);
4010 if (local_got_refcounts == NULL)
4014 size = symtab_hdr->sh_info;
4015 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4016 local_got_refcounts = bfd_zalloc (abfd, size);
4017 if (local_got_refcounts == NULL)
4019 elf_local_got_refcounts (abfd) = local_got_refcounts;
4021 local_got_refcounts[r_symndx] += 1;
4023 if (r_type == R_ARM_GOT32)
4029 if (htab->sgot == NULL)
4031 if (htab->root.dynobj == NULL)
4032 htab->root.dynobj = abfd;
4033 if (!create_got_section (htab->root.dynobj, info))
4047 case R_ARM_THM_PC22:
4048 /* Should the interworking branches be listed here? */
4051 /* If this reloc is in a read-only section, we might
4052 need a copy reloc. We can't check reliably at this
4053 stage whether the section is read-only, as input
4054 sections have not yet been mapped to output sections.
4055 Tentatively set the flag for now, and correct in
4056 adjust_dynamic_symbol. */
4060 /* We may need a .plt entry if the function this reloc
4061 refers to is in a different object. We can't tell for
4062 sure yet, because something later might force the
4064 if (r_type == R_ARM_PC24
4066 || r_type == R_ARM_CALL
4067 || r_type == R_ARM_JUMP24
4068 || r_type == R_ARM_PREL31
4070 || r_type == R_ARM_PLT32
4071 || r_type == R_ARM_THM_PC22)
4074 /* If we create a PLT entry, this relocation will reference
4075 it, even if it's an ABS32 relocation. */
4076 h->plt.refcount += 1;
4078 if (r_type == R_ARM_THM_PC22)
4079 eh->plt_thumb_refcount += 1;
4082 /* If we are creating a shared library or relocatable executable,
4083 and this is a reloc against a global symbol, or a non PC
4084 relative reloc against a local symbol, then we need to copy
4085 the reloc into the shared library. However, if we are linking
4086 with -Bsymbolic, we do not need to copy a reloc against a
4087 global symbol which is defined in an object we are
4088 including in the link (i.e., DEF_REGULAR is set). At
4089 this point we have not seen all the input files, so it is
4090 possible that DEF_REGULAR is not set now but will be set
4091 later (it is never cleared). We account for that
4092 possibility below by storing information in the
4093 relocs_copied field of the hash table entry. */
4094 if ((info->shared || htab->root.is_relocatable_executable)
4095 && (sec->flags & SEC_ALLOC) != 0
4096 && ((r_type != R_ARM_PC24
4097 && r_type != R_ARM_PLT32
4099 && r_type != R_ARM_CALL
4100 && r_type != R_ARM_JUMP24
4101 && r_type != R_ARM_PREL31
4103 && r_type != R_ARM_REL32
4104 && r_type != R_ARM_THM_PC22)
4106 && (! info->symbolic
4107 || !h->def_regular))))
4109 struct elf32_arm_relocs_copied *p, **head;
4111 /* When creating a shared object, we must copy these
4112 reloc types into the output file. We create a reloc
4113 section in dynobj and make room for this reloc. */
4118 name = (bfd_elf_string_from_elf_section
4120 elf_elfheader (abfd)->e_shstrndx,
4121 elf_section_data (sec)->rel_hdr.sh_name));
4125 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
4126 && strcmp (bfd_get_section_name (abfd, sec),
4129 sreloc = bfd_get_section_by_name (dynobj, name);
4134 sreloc = bfd_make_section (dynobj, name);
4135 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4136 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4137 if ((sec->flags & SEC_ALLOC) != 0
4138 /* BPABI objects never have dynamic
4139 relocations mapped. */
4140 && !htab->symbian_p)
4141 flags |= SEC_ALLOC | SEC_LOAD;
4143 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4144 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
4148 elf_section_data (sec)->sreloc = sreloc;
4151 /* If this is a global symbol, we count the number of
4152 relocations we need for this symbol. */
4155 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4159 /* Track dynamic relocs needed for local syms too.
4160 We really need local syms available to do this
4164 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4169 head = ((struct elf32_arm_relocs_copied **)
4170 &elf_section_data (s)->local_dynrel);
4174 if (p == NULL || p->section != sec)
4176 bfd_size_type amt = sizeof *p;
4178 p = bfd_alloc (htab->root.dynobj, amt);
4187 if (r_type == R_ARM_ABS32
4188 || r_type == R_ARM_REL32)
4193 /* This relocation describes the C++ object vtable hierarchy.
4194 Reconstruct it for later use during GC. */
4195 case R_ARM_GNU_VTINHERIT:
4196 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4200 /* This relocation describes which C++ vtable entries are actually
4201 used. Record for later use during GC. */
4202 case R_ARM_GNU_VTENTRY:
4203 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
4213 is_arm_mapping_symbol_name (const char * name)
4215 return (name != NULL)
4217 && ((name[1] == 'a') || (name[1] == 't') || (name[1] == 'd'))
4221 /* Treat mapping symbols as special target symbols. */
4224 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4226 return is_arm_mapping_symbol_name (sym->name);
4229 /* This is a copy of elf_find_function() from elf.c except that
4230 ARM mapping symbols are ignored when looking for function names
4231 and STT_ARM_TFUNC is considered to a function type. */
4234 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4238 const char ** filename_ptr,
4239 const char ** functionname_ptr)
4241 const char * filename = NULL;
4242 asymbol * func = NULL;
4243 bfd_vma low_func = 0;
4246 for (p = symbols; *p != NULL; p++)
4250 q = (elf_symbol_type *) *p;
4252 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4257 filename = bfd_asymbol_name (&q->symbol);
4261 /* Skip $a and $t symbols. */
4262 if ((q->symbol.flags & BSF_LOCAL)
4263 && is_arm_mapping_symbol_name (q->symbol.name))
4267 if (bfd_get_section (&q->symbol) == section
4268 && q->symbol.value >= low_func
4269 && q->symbol.value <= offset)
4271 func = (asymbol *) q;
4272 low_func = q->symbol.value;
4282 *filename_ptr = filename;
4283 if (functionname_ptr)
4284 *functionname_ptr = bfd_asymbol_name (func);
4290 /* Find the nearest line to a particular section and offset, for error
4291 reporting. This code is a duplicate of the code in elf.c, except
4292 that it uses arm_elf_find_function. */
4295 elf32_arm_find_nearest_line (bfd * abfd,
4299 const char ** filename_ptr,
4300 const char ** functionname_ptr,
4301 unsigned int * line_ptr)
4303 bfd_boolean found = FALSE;
4305 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4307 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4308 filename_ptr, functionname_ptr,
4310 & elf_tdata (abfd)->dwarf2_find_line_info))
4312 if (!*functionname_ptr)
4313 arm_elf_find_function (abfd, section, symbols, offset,
4314 *filename_ptr ? NULL : filename_ptr,
4320 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4321 & found, filename_ptr,
4322 functionname_ptr, line_ptr,
4323 & elf_tdata (abfd)->line_info))
4326 if (found && (*functionname_ptr || *line_ptr))
4329 if (symbols == NULL)
4332 if (! arm_elf_find_function (abfd, section, symbols, offset,
4333 filename_ptr, functionname_ptr))
4340 /* Adjust a symbol defined by a dynamic object and referenced by a
4341 regular object. The current definition is in some section of the
4342 dynamic object, but we're not including those sections. We have to
4343 change the definition to something the rest of the link can
4347 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4348 struct elf_link_hash_entry * h)
4352 unsigned int power_of_two;
4353 struct elf32_arm_link_hash_entry * eh;
4354 struct elf32_arm_link_hash_table *globals;
4356 globals = elf32_arm_hash_table (info);
4357 dynobj = elf_hash_table (info)->dynobj;
4359 /* Make sure we know what is going on here. */
4360 BFD_ASSERT (dynobj != NULL
4362 || h->u.weakdef != NULL
4365 && !h->def_regular)));
4367 eh = (struct elf32_arm_link_hash_entry *) h;
4369 /* If this is a function, put it in the procedure linkage table. We
4370 will fill in the contents of the procedure linkage table later,
4371 when we know the address of the .got section. */
4372 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
4375 if (h->plt.refcount <= 0
4376 || SYMBOL_CALLS_LOCAL (info, h)
4377 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4378 && h->root.type == bfd_link_hash_undefweak))
4380 /* This case can occur if we saw a PLT32 reloc in an input
4381 file, but the symbol was never referred to by a dynamic
4382 object, or if all references were garbage collected. In
4383 such a case, we don't actually need to build a procedure
4384 linkage table, and we can just do a PC24 reloc instead. */
4385 h->plt.offset = (bfd_vma) -1;
4386 eh->plt_thumb_refcount = 0;
4394 /* It's possible that we incorrectly decided a .plt reloc was
4395 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4396 in check_relocs. We can't decide accurately between function
4397 and non-function syms in check-relocs; Objects loaded later in
4398 the link may change h->type. So fix it now. */
4399 h->plt.offset = (bfd_vma) -1;
4400 eh->plt_thumb_refcount = 0;
4403 /* If this is a weak symbol, and there is a real definition, the
4404 processor independent code will have arranged for us to see the
4405 real definition first, and we can just use the same value. */
4406 if (h->u.weakdef != NULL)
4408 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4409 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4410 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4411 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4415 /* This is a reference to a symbol defined by a dynamic object which
4416 is not a function. */
4418 /* If we are creating a shared library, we must presume that the
4419 only references to the symbol are via the global offset table.
4420 For such cases we need not do anything here; the relocations will
4421 be handled correctly by relocate_section. Relocatable executables
4422 can reference data in shared objects directly, so we don't need to
4423 do anything here. */
4424 if (info->shared || globals->root.is_relocatable_executable)
4427 /* We must allocate the symbol in our .dynbss section, which will
4428 become part of the .bss section of the executable. There will be
4429 an entry for this symbol in the .dynsym section. The dynamic
4430 object will contain position independent code, so all references
4431 from the dynamic object to this symbol will go through the global
4432 offset table. The dynamic linker will use the .dynsym entry to
4433 determine the address it must put in the global offset table, so
4434 both the dynamic object and the regular object will refer to the
4435 same memory location for the variable. */
4436 s = bfd_get_section_by_name (dynobj, ".dynbss");
4437 BFD_ASSERT (s != NULL);
4439 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4440 copy the initial value out of the dynamic object and into the
4441 runtime process image. We need to remember the offset into the
4442 .rel.bss section we are going to use. */
4443 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4447 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
4448 BFD_ASSERT (srel != NULL);
4449 srel->size += sizeof (Elf32_External_Rel);
4453 /* We need to figure out the alignment required for this symbol. I
4454 have no idea how ELF linkers handle this. */
4455 power_of_two = bfd_log2 (h->size);
4456 if (power_of_two > 3)
4459 /* Apply the required alignment. */
4460 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4461 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4463 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4467 /* Define the symbol as being at this point in the section. */
4468 h->root.u.def.section = s;
4469 h->root.u.def.value = s->size;
4471 /* Increment the section size to make room for the symbol. */
4477 /* Allocate space in .plt, .got and associated reloc sections for
4481 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
4483 struct bfd_link_info *info;
4484 struct elf32_arm_link_hash_table *htab;
4485 struct elf32_arm_link_hash_entry *eh;
4486 struct elf32_arm_relocs_copied *p;
4488 eh = (struct elf32_arm_link_hash_entry *) h;
4490 if (h->root.type == bfd_link_hash_indirect)
4493 if (h->root.type == bfd_link_hash_warning)
4494 /* When warning symbols are created, they **replace** the "real"
4495 entry in the hash table, thus we never get to see the real
4496 symbol in a hash traversal. So look at it now. */
4497 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4499 info = (struct bfd_link_info *) inf;
4500 htab = elf32_arm_hash_table (info);
4502 if (htab->root.dynamic_sections_created
4503 && h->plt.refcount > 0)
4505 /* Make sure this symbol is output as a dynamic symbol.
4506 Undefined weak syms won't yet be marked as dynamic. */
4507 if (h->dynindx == -1
4508 && !h->forced_local)
4510 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4515 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4517 asection *s = htab->splt;
4519 /* If this is the first .plt entry, make room for the special
4522 s->size += htab->plt_header_size;
4524 h->plt.offset = s->size;
4526 /* If we will insert a Thumb trampoline before this PLT, leave room
4528 if (!htab->symbian_p && eh->plt_thumb_refcount > 0)
4530 h->plt.offset += PLT_THUMB_STUB_SIZE;
4531 s->size += PLT_THUMB_STUB_SIZE;
4534 /* If this symbol is not defined in a regular file, and we are
4535 not generating a shared library, then set the symbol to this
4536 location in the .plt. This is required to make function
4537 pointers compare as equal between the normal executable and
4538 the shared library. */
4542 h->root.u.def.section = s;
4543 h->root.u.def.value = h->plt.offset;
4545 /* Make sure the function is not marked as Thumb, in case
4546 it is the target of an ABS32 relocation, which will
4547 point to the PLT entry. */
4548 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
4549 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
4552 /* Make room for this entry. */
4553 s->size += htab->plt_entry_size;
4555 if (!htab->symbian_p)
4557 /* We also need to make an entry in the .got.plt section, which
4558 will be placed in the .got section by the linker script. */
4559 eh->plt_got_offset = htab->sgotplt->size;
4560 htab->sgotplt->size += 4;
4563 /* We also need to make an entry in the .rel.plt section. */
4564 htab->srelplt->size += sizeof (Elf32_External_Rel);
4568 h->plt.offset = (bfd_vma) -1;
4574 h->plt.offset = (bfd_vma) -1;
4578 if (h->got.refcount > 0)
4583 /* Make sure this symbol is output as a dynamic symbol.
4584 Undefined weak syms won't yet be marked as dynamic. */
4585 if (h->dynindx == -1
4586 && !h->forced_local)
4588 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4592 if (!htab->symbian_p)
4595 h->got.offset = s->size;
4597 dyn = htab->root.dynamic_sections_created;
4598 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4599 || h->root.type != bfd_link_hash_undefweak)
4601 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
4602 htab->srelgot->size += sizeof (Elf32_External_Rel);
4606 h->got.offset = (bfd_vma) -1;
4608 if (eh->relocs_copied == NULL)
4611 /* In the shared -Bsymbolic case, discard space allocated for
4612 dynamic pc-relative relocs against symbols which turn out to be
4613 defined in regular objects. For the normal shared case, discard
4614 space for pc-relative relocs that have become local due to symbol
4615 visibility changes. */
4617 if (info->shared || htab->root.is_relocatable_executable)
4619 /* Discard relocs on undefined weak syms with non-default
4621 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4622 && h->root.type == bfd_link_hash_undefweak)
4623 eh->relocs_copied = NULL;
4624 else if (htab->root.is_relocatable_executable && h->dynindx == -1
4625 && h->root.type == bfd_link_hash_new)
4627 /* Output absolute symbols so that we can create relocations
4628 against them. For normal symbols we output a relocation
4629 against the section that contains them. */
4630 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4637 /* For the non-shared case, discard space for relocs against
4638 symbols which turn out to need copy relocs or are not
4644 || (htab->root.dynamic_sections_created
4645 && (h->root.type == bfd_link_hash_undefweak
4646 || h->root.type == bfd_link_hash_undefined))))
4648 /* Make sure this symbol is output as a dynamic symbol.
4649 Undefined weak syms won't yet be marked as dynamic. */
4650 if (h->dynindx == -1
4651 && !h->forced_local)
4653 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4657 /* If that succeeded, we know we'll be keeping all the
4659 if (h->dynindx != -1)
4663 eh->relocs_copied = NULL;
4668 /* Finally, allocate space. */
4669 for (p = eh->relocs_copied; p != NULL; p = p->next)
4671 asection *sreloc = elf_section_data (p->section)->sreloc;
4672 sreloc->size += p->count * sizeof (Elf32_External_Rel);
4678 /* Find any dynamic relocs that apply to read-only sections. */
4681 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
4683 struct elf32_arm_link_hash_entry *eh;
4684 struct elf32_arm_relocs_copied *p;
4686 if (h->root.type == bfd_link_hash_warning)
4687 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4689 eh = (struct elf32_arm_link_hash_entry *) h;
4690 for (p = eh->relocs_copied; p != NULL; p = p->next)
4692 asection *s = p->section;
4694 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4696 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4698 info->flags |= DF_TEXTREL;
4700 /* Not an error, just cut short the traversal. */
4707 /* Set the sizes of the dynamic sections. */
4710 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4711 struct bfd_link_info * info)
4718 struct elf32_arm_link_hash_table *htab;
4720 htab = elf32_arm_hash_table (info);
4721 dynobj = elf_hash_table (info)->dynobj;
4722 BFD_ASSERT (dynobj != NULL);
4724 if (elf_hash_table (info)->dynamic_sections_created)
4726 /* Set the contents of the .interp section to the interpreter. */
4727 if (info->executable)
4729 s = bfd_get_section_by_name (dynobj, ".interp");
4730 BFD_ASSERT (s != NULL);
4731 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4732 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4736 /* Set up .got offsets for local syms, and space for local dynamic
4738 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4740 bfd_signed_vma *local_got;
4741 bfd_signed_vma *end_local_got;
4742 char *local_tls_type;
4743 bfd_size_type locsymcount;
4744 Elf_Internal_Shdr *symtab_hdr;
4747 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4750 for (s = ibfd->sections; s != NULL; s = s->next)
4752 struct elf32_arm_relocs_copied *p;
4754 for (p = *((struct elf32_arm_relocs_copied **)
4755 &elf_section_data (s)->local_dynrel);
4759 if (!bfd_is_abs_section (p->section)
4760 && bfd_is_abs_section (p->section->output_section))
4762 /* Input section has been discarded, either because
4763 it is a copy of a linkonce section or due to
4764 linker script /DISCARD/, so we'll be discarding
4767 else if (p->count != 0)
4769 srel = elf_section_data (p->section)->sreloc;
4770 srel->size += p->count * sizeof (Elf32_External_Rel);
4771 if ((p->section->output_section->flags & SEC_READONLY) != 0)
4772 info->flags |= DF_TEXTREL;
4777 local_got = elf_local_got_refcounts (ibfd);
4781 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4782 locsymcount = symtab_hdr->sh_info;
4783 end_local_got = local_got + locsymcount;
4785 srel = htab->srelgot;
4786 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
4790 *local_got = s->size;
4793 srel->size += sizeof (Elf32_External_Rel);
4796 *local_got = (bfd_vma) -1;
4800 /* Allocate global sym .plt and .got entries, and space for global
4801 sym dynamic relocs. */
4802 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
4804 /* The check_relocs and adjust_dynamic_symbol entry points have
4805 determined the sizes of the various dynamic sections. Allocate
4809 for (s = dynobj->sections; s != NULL; s = s->next)
4814 if ((s->flags & SEC_LINKER_CREATED) == 0)
4817 /* It's OK to base decisions on the section name, because none
4818 of the dynobj section names depend upon the input files. */
4819 name = bfd_get_section_name (dynobj, s);
4823 if (strcmp (name, ".plt") == 0)
4827 /* Strip this section if we don't need it; see the
4833 /* Remember whether there is a PLT. */
4837 else if (strncmp (name, ".rel", 4) == 0)
4841 /* If we don't need this section, strip it from the
4842 output file. This is mostly to handle .rel.bss and
4843 .rel.plt. We must create both sections in
4844 create_dynamic_sections, because they must be created
4845 before the linker maps input sections to output
4846 sections. The linker does that before
4847 adjust_dynamic_symbol is called, and it is that
4848 function which decides whether anything needs to go
4849 into these sections. */
4854 /* Remember whether there are any reloc sections other
4856 if (strcmp (name, ".rel.plt") != 0)
4859 /* We use the reloc_count field as a counter if we need
4860 to copy relocs into the output file. */
4864 else if (strncmp (name, ".got", 4) != 0)
4866 /* It's not one of our sections, so don't allocate space. */
4872 _bfd_strip_section_from_output (info, s);
4876 /* Allocate memory for the section contents. */
4877 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4878 if (s->contents == NULL && s->size != 0)
4882 if (elf_hash_table (info)->dynamic_sections_created)
4884 /* Add some entries to the .dynamic section. We fill in the
4885 values later, in elf32_arm_finish_dynamic_sections, but we
4886 must add the entries now so that we get the correct size for
4887 the .dynamic section. The DT_DEBUG entry is filled in by the
4888 dynamic linker and used by the debugger. */
4889 #define add_dynamic_entry(TAG, VAL) \
4890 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4894 if (!add_dynamic_entry (DT_DEBUG, 0))
4900 if ( !add_dynamic_entry (DT_PLTGOT, 0)
4901 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4902 || !add_dynamic_entry (DT_PLTREL, DT_REL)
4903 || !add_dynamic_entry (DT_JMPREL, 0))
4909 if ( !add_dynamic_entry (DT_REL, 0)
4910 || !add_dynamic_entry (DT_RELSZ, 0)
4911 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
4915 /* If any dynamic relocs apply to a read-only section,
4916 then we need a DT_TEXTREL entry. */
4917 if ((info->flags & DF_TEXTREL) == 0)
4918 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
4921 if ((info->flags & DF_TEXTREL) != 0)
4923 if (!add_dynamic_entry (DT_TEXTREL, 0))
4925 info->flags |= DF_TEXTREL;
4928 #undef add_synamic_entry
4933 /* Finish up dynamic symbol handling. We set the contents of various
4934 dynamic sections here. */
4937 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
4938 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
4941 struct elf32_arm_link_hash_table *htab;
4942 struct elf32_arm_link_hash_entry *eh;
4944 dynobj = elf_hash_table (info)->dynobj;
4945 htab = elf32_arm_hash_table (info);
4946 eh = (struct elf32_arm_link_hash_entry *) h;
4948 if (h->plt.offset != (bfd_vma) -1)
4954 Elf_Internal_Rela rel;
4956 /* This symbol has an entry in the procedure linkage table. Set
4959 BFD_ASSERT (h->dynindx != -1);
4961 splt = bfd_get_section_by_name (dynobj, ".plt");
4962 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
4963 BFD_ASSERT (splt != NULL && srel != NULL);
4965 /* Fill in the entry in the procedure linkage table. */
4966 if (htab->symbian_p)
4969 for (i = 0; i < htab->plt_entry_size / 4; ++i)
4970 bfd_put_32 (output_bfd,
4971 elf32_arm_symbian_plt_entry[i],
4972 splt->contents + h->plt.offset + 4 * i);
4974 /* Fill in the entry in the .rel.plt section. */
4975 rel.r_offset = (splt->output_section->vma
4976 + splt->output_offset
4977 + h->plt.offset + 4 * (i - 1));
4978 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
4980 /* Get the index in the procedure linkage table which
4981 corresponds to this symbol. This is the index of this symbol
4982 in all the symbols for which we are making plt entries. The
4983 first entry in the procedure linkage table is reserved. */
4984 plt_index = ((h->plt.offset - htab->plt_header_size)
4985 / htab->plt_entry_size);
4990 bfd_vma got_displacement;
4993 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4994 BFD_ASSERT (sgot != NULL);
4996 /* Get the offset into the .got.plt table of the entry that
4997 corresponds to this function. */
4998 got_offset = eh->plt_got_offset;
5000 /* Get the index in the procedure linkage table which
5001 corresponds to this symbol. This is the index of this symbol
5002 in all the symbols for which we are making plt entries. The
5003 first three entries in .got.plt are reserved; after that
5004 symbols appear in the same order as in .plt. */
5005 plt_index = (got_offset - 12) / 4;
5007 /* Calculate the displacement between the PLT slot and the
5008 entry in the GOT. The eight-byte offset accounts for the
5009 value produced by adding to pc in the first instruction
5011 got_displacement = (sgot->output_section->vma
5012 + sgot->output_offset
5014 - splt->output_section->vma
5015 - splt->output_offset
5019 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5021 if (eh->plt_thumb_refcount > 0)
5023 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5024 splt->contents + h->plt.offset - 4);
5025 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5026 splt->contents + h->plt.offset - 2);
5029 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5030 splt->contents + h->plt.offset + 0);
5031 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5032 splt->contents + h->plt.offset + 4);
5033 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5034 splt->contents + h->plt.offset + 8);
5035 #ifdef FOUR_WORD_PLT
5036 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5037 splt->contents + h->plt.offset + 12);
5040 /* Fill in the entry in the global offset table. */
5041 bfd_put_32 (output_bfd,
5042 (splt->output_section->vma
5043 + splt->output_offset),
5044 sgot->contents + got_offset);
5046 /* Fill in the entry in the .rel.plt section. */
5047 rel.r_offset = (sgot->output_section->vma
5048 + sgot->output_offset
5050 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5053 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5054 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5056 if (!h->def_regular)
5058 /* Mark the symbol as undefined, rather than as defined in
5059 the .plt section. Leave the value alone. */
5060 sym->st_shndx = SHN_UNDEF;
5061 /* If the symbol is weak, we do need to clear the value.
5062 Otherwise, the PLT entry would provide a definition for
5063 the symbol even if the symbol wasn't defined anywhere,
5064 and so the symbol would never be NULL. */
5065 if (!h->ref_regular_nonweak)
5070 if (h->got.offset != (bfd_vma) -1)
5074 Elf_Internal_Rela rel;
5077 /* This symbol has an entry in the global offset table. Set it
5079 sgot = bfd_get_section_by_name (dynobj, ".got");
5080 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5081 BFD_ASSERT (sgot != NULL && srel != NULL);
5083 rel.r_offset = (sgot->output_section->vma
5084 + sgot->output_offset
5085 + (h->got.offset &~ (bfd_vma) 1));
5087 /* If this is a static link, or it is a -Bsymbolic link and the
5088 symbol is defined locally or was forced to be local because
5089 of a version file, we just want to emit a RELATIVE reloc.
5090 The entry in the global offset table will already have been
5091 initialized in the relocate_section function. */
5093 && SYMBOL_REFERENCES_LOCAL (info, h))
5095 BFD_ASSERT((h->got.offset & 1) != 0);
5096 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5100 BFD_ASSERT((h->got.offset & 1) == 0);
5101 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5102 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5105 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5106 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5112 Elf_Internal_Rela rel;
5115 /* This symbol needs a copy reloc. Set it up. */
5116 BFD_ASSERT (h->dynindx != -1
5117 && (h->root.type == bfd_link_hash_defined
5118 || h->root.type == bfd_link_hash_defweak));
5120 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5122 BFD_ASSERT (s != NULL);
5124 rel.r_offset = (h->root.u.def.value
5125 + h->root.u.def.section->output_section->vma
5126 + h->root.u.def.section->output_offset);
5127 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5128 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5129 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5132 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5133 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5134 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5135 sym->st_shndx = SHN_ABS;
5140 /* Finish up the dynamic sections. */
5143 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5149 dynobj = elf_hash_table (info)->dynobj;
5151 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5152 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5153 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5155 if (elf_hash_table (info)->dynamic_sections_created)
5158 Elf32_External_Dyn *dyncon, *dynconend;
5159 struct elf32_arm_link_hash_table *htab;
5161 htab = elf32_arm_hash_table (info);
5162 splt = bfd_get_section_by_name (dynobj, ".plt");
5163 BFD_ASSERT (splt != NULL && sdyn != NULL);
5165 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5166 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5168 for (; dyncon < dynconend; dyncon++)
5170 Elf_Internal_Dyn dyn;
5174 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5185 goto get_vma_if_bpabi;
5188 goto get_vma_if_bpabi;
5191 goto get_vma_if_bpabi;
5193 name = ".gnu.version";
5194 goto get_vma_if_bpabi;
5196 name = ".gnu.version_d";
5197 goto get_vma_if_bpabi;
5199 name = ".gnu.version_r";
5200 goto get_vma_if_bpabi;
5208 s = bfd_get_section_by_name (output_bfd, name);
5209 BFD_ASSERT (s != NULL);
5210 if (!htab->symbian_p)
5211 dyn.d_un.d_ptr = s->vma;
5213 /* In the BPABI, tags in the PT_DYNAMIC section point
5214 at the file offset, not the memory address, for the
5215 convenience of the post linker. */
5216 dyn.d_un.d_ptr = s->filepos;
5217 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5221 if (htab->symbian_p)
5226 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5227 BFD_ASSERT (s != NULL);
5228 dyn.d_un.d_val = s->size;
5229 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5233 if (!htab->symbian_p)
5235 /* My reading of the SVR4 ABI indicates that the
5236 procedure linkage table relocs (DT_JMPREL) should be
5237 included in the overall relocs (DT_REL). This is
5238 what Solaris does. However, UnixWare can not handle
5239 that case. Therefore, we override the DT_RELSZ entry
5240 here to make it not include the JMPREL relocs. Since
5241 the linker script arranges for .rel.plt to follow all
5242 other relocation sections, we don't have to worry
5243 about changing the DT_REL entry. */
5244 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5246 dyn.d_un.d_val -= s->size;
5247 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5255 /* In the BPABI, the DT_REL tag must point at the file
5256 offset, not the VMA, of the first relocation
5257 section. So, we use code similar to that in
5258 elflink.c, but do not check for SHF_ALLOC on the
5259 relcoation section, since relocations sections are
5260 never allocated under the BPABI. The comments above
5261 about Unixware notwithstanding, we include all of the
5262 relocations here. */
5263 if (htab->symbian_p)
5266 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5267 ? SHT_REL : SHT_RELA);
5269 for (i = 1; i < elf_numsections (output_bfd); i++)
5271 Elf_Internal_Shdr *hdr
5272 = elf_elfsections (output_bfd)[i];
5273 if (hdr->sh_type == type)
5275 if (dyn.d_tag == DT_RELSZ
5276 || dyn.d_tag == DT_RELASZ)
5277 dyn.d_un.d_val += hdr->sh_size;
5278 else if ((ufile_ptr) hdr->sh_offset
5279 <= dyn.d_un.d_val - 1)
5280 dyn.d_un.d_val = hdr->sh_offset;
5283 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5287 /* Set the bottom bit of DT_INIT/FINI if the
5288 corresponding function is Thumb. */
5290 name = info->init_function;
5293 name = info->fini_function;
5295 /* If it wasn't set by elf_bfd_final_link
5296 then there is nothing to adjust. */
5297 if (dyn.d_un.d_val != 0)
5299 struct elf_link_hash_entry * eh;
5301 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5302 FALSE, FALSE, TRUE);
5303 if (eh != (struct elf_link_hash_entry *) NULL
5304 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5306 dyn.d_un.d_val |= 1;
5307 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5314 /* Fill in the first entry in the procedure linkage table. */
5315 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5317 bfd_vma got_displacement;
5319 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5320 got_displacement = (sgot->output_section->vma
5321 + sgot->output_offset
5322 - splt->output_section->vma
5323 - splt->output_offset
5326 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5327 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5328 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5329 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5330 #ifdef FOUR_WORD_PLT
5331 /* The displacement value goes in the otherwise-unused last word of
5332 the second entry. */
5333 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5335 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5339 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5340 really seem like the right value. */
5341 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5344 /* Fill in the first three entries in the global offset table. */
5350 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5352 bfd_put_32 (output_bfd,
5353 sdyn->output_section->vma + sdyn->output_offset,
5355 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5356 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5359 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5366 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5368 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5369 struct elf32_arm_link_hash_table *globals;
5371 i_ehdrp = elf_elfheader (abfd);
5373 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
5374 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
5376 i_ehdrp->e_ident[EI_OSABI] = 0;
5377 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
5381 globals = elf32_arm_hash_table (link_info);
5382 if (globals->byteswap_code)
5383 i_ehdrp->e_flags |= EF_ARM_BE8;
5387 static enum elf_reloc_type_class
5388 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
5390 switch ((int) ELF32_R_TYPE (rela->r_info))
5392 case R_ARM_RELATIVE:
5393 return reloc_class_relative;
5394 case R_ARM_JUMP_SLOT:
5395 return reloc_class_plt;
5397 return reloc_class_copy;
5399 return reloc_class_normal;
5403 /* Set the right machine number for an Arm ELF file. */
5406 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
5408 if (hdr->sh_type == SHT_NOTE)
5409 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5415 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
5417 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
5420 /* Return TRUE if this is an unwinding table entry. */
5423 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
5427 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
5428 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
5429 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
5430 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
5434 /* Set the type and flags for an ARM section. We do this by
5435 the section name, which is a hack, but ought to work. */
5438 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
5442 name = bfd_get_section_name (abfd, sec);
5444 if (is_arm_elf_unwind_section_name (abfd, name))
5446 hdr->sh_type = SHT_ARM_EXIDX;
5447 hdr->sh_flags |= SHF_LINK_ORDER;
5452 /* Handle an ARM specific section when reading an object file. This is
5453 called when bfd_section_from_shdr finds a section with an unknown
5457 elf32_arm_section_from_shdr (bfd *abfd,
5458 Elf_Internal_Shdr * hdr,
5462 /* There ought to be a place to keep ELF backend specific flags, but
5463 at the moment there isn't one. We just keep track of the
5464 sections by their name, instead. Fortunately, the ABI gives
5465 names for all the ARM specific sections, so we will probably get
5467 switch (hdr->sh_type)
5476 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5482 /* Called for each symbol. Builds a section map based on mapping symbols.
5483 Does not alter any of the symbols. */
5486 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
5488 Elf_Internal_Sym *elfsym,
5489 asection *input_sec,
5490 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
5493 elf32_arm_section_map *map;
5494 struct elf32_arm_link_hash_table *globals;
5496 /* Only do this on final link. */
5497 if (info->relocatable)
5500 /* Only build a map if we need to byteswap code. */
5501 globals = elf32_arm_hash_table (info);
5502 if (!globals->byteswap_code)
5505 /* We only want mapping symbols. */
5506 if (! is_arm_mapping_symbol_name (name))
5509 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
5510 map = elf32_arm_section_data (input_sec)->map;
5511 /* TODO: This may be inefficient, but we probably don't usually have many
5512 mapping symbols per section. */
5513 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
5514 elf32_arm_section_data (input_sec)->map = map;
5516 map[mapcount - 1].vma = elfsym->st_value;
5517 map[mapcount - 1].type = name[1];
5522 /* Allocate target specific section data. */
5525 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
5527 struct _arm_elf_section_data *sdata;
5528 bfd_size_type amt = sizeof (*sdata);
5530 sdata = bfd_zalloc (abfd, amt);
5533 sec->used_by_bfd = sdata;
5535 return _bfd_elf_new_section_hook (abfd, sec);
5539 /* Used to order a list of mapping symbols by address. */
5542 elf32_arm_compare_mapping (const void * a, const void * b)
5544 return ((const elf32_arm_section_map *) a)->vma
5545 > ((const elf32_arm_section_map *) b)->vma;
5549 /* Do code byteswapping. Return FALSE afterwards so that the section is
5550 written out as normal. */
5553 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
5557 elf32_arm_section_map *map;
5564 mapcount = elf32_arm_section_data (sec)->mapcount;
5565 map = elf32_arm_section_data (sec)->map;
5570 qsort (map, mapcount, sizeof (elf32_arm_section_map),
5571 elf32_arm_compare_mapping);
5573 offset = sec->output_section->vma + sec->output_offset;
5574 ptr = map[0].vma - offset;
5575 for (i = 0; i < mapcount; i++)
5577 if (i == mapcount - 1)
5580 end = map[i + 1].vma - offset;
5582 switch (map[i].type)
5585 /* Byte swap code words. */
5586 while (ptr + 3 < end)
5588 tmp = contents[ptr];
5589 contents[ptr] = contents[ptr + 3];
5590 contents[ptr + 3] = tmp;
5591 tmp = contents[ptr + 1];
5592 contents[ptr + 1] = contents[ptr + 2];
5593 contents[ptr + 2] = tmp;
5599 /* Byte swap code halfwords. */
5600 while (ptr + 1 < end)
5602 tmp = contents[ptr];
5603 contents[ptr] = contents[ptr + 1];
5604 contents[ptr + 1] = tmp;
5610 /* Leave data alone. */
5619 /* Display STT_ARM_TFUNC symbols as functions. */
5622 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5625 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5627 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
5628 elfsym->symbol.flags |= BSF_FUNCTION;
5632 /* Mangle thumb function symbols as we read them in. */
5635 elf32_arm_swap_symbol_in (bfd * abfd,
5638 Elf_Internal_Sym *dst)
5640 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
5642 /* New EABI objects mark thumb function symbols by setting the low bit of
5643 the address. Turn these into STT_ARM_TFUNC. */
5644 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
5645 && (dst->st_value & 1))
5647 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
5648 dst->st_value &= ~(bfd_vma) 1;
5653 /* Mangle thumb function symbols as we write them out. */
5656 elf32_arm_swap_symbol_out (bfd *abfd,
5657 const Elf_Internal_Sym *src,
5661 Elf_Internal_Sym newsym;
5663 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
5664 of the address set, as per the new EABI. We do this unconditionally
5665 because objcopy does not set the elf header flags until after
5666 it writes out the symbol table. */
5667 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
5670 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
5671 newsym.st_value |= 1;
5675 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
5678 /* Add the PT_ARM_EXIDX program header. */
5681 elf32_arm_modify_segment_map (bfd *abfd,
5682 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5684 struct elf_segment_map *m;
5687 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
5688 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5690 /* If there is already a PT_ARM_EXIDX header, then we do not
5691 want to add another one. This situation arises when running
5692 "strip"; the input binary already has the header. */
5693 m = elf_tdata (abfd)->segment_map;
5694 while (m && m->p_type != PT_ARM_EXIDX)
5698 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
5701 m->p_type = PT_ARM_EXIDX;
5703 m->sections[0] = sec;
5705 m->next = elf_tdata (abfd)->segment_map;
5706 elf_tdata (abfd)->segment_map = m;
5713 /* We may add a PT_ARM_EXIDX program header. */
5716 elf32_arm_additional_program_headers (bfd *abfd)
5720 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
5721 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5727 /* We use this to override swap_symbol_in and swap_symbol_out. */
5728 const struct elf_size_info elf32_arm_size_info = {
5729 sizeof (Elf32_External_Ehdr),
5730 sizeof (Elf32_External_Phdr),
5731 sizeof (Elf32_External_Shdr),
5732 sizeof (Elf32_External_Rel),
5733 sizeof (Elf32_External_Rela),
5734 sizeof (Elf32_External_Sym),
5735 sizeof (Elf32_External_Dyn),
5736 sizeof (Elf_External_Note),
5740 ELFCLASS32, EV_CURRENT,
5741 bfd_elf32_write_out_phdrs,
5742 bfd_elf32_write_shdrs_and_ehdr,
5743 bfd_elf32_write_relocs,
5744 elf32_arm_swap_symbol_in,
5745 elf32_arm_swap_symbol_out,
5746 bfd_elf32_slurp_reloc_table,
5747 bfd_elf32_slurp_symbol_table,
5748 bfd_elf32_swap_dyn_in,
5749 bfd_elf32_swap_dyn_out,
5750 bfd_elf32_swap_reloc_in,
5751 bfd_elf32_swap_reloc_out,
5752 bfd_elf32_swap_reloca_in,
5753 bfd_elf32_swap_reloca_out
5756 #define ELF_ARCH bfd_arch_arm
5757 #define ELF_MACHINE_CODE EM_ARM
5758 #ifdef __QNXTARGET__
5759 #define ELF_MAXPAGESIZE 0x1000
5761 #define ELF_MAXPAGESIZE 0x8000
5763 #define ELF_MINPAGESIZE 0x1000
5765 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5766 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
5767 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5768 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5769 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
5770 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
5771 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
5772 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
5773 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
5775 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5776 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5777 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5778 #define elf_backend_check_relocs elf32_arm_check_relocs
5779 #define elf_backend_relocate_section elf32_arm_relocate_section
5780 #define elf_backend_write_section elf32_arm_write_section
5781 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5782 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
5783 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5784 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
5785 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
5786 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
5787 #define elf_backend_post_process_headers elf32_arm_post_process_headers
5788 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
5789 #define elf_backend_object_p elf32_arm_object_p
5790 #define elf_backend_section_flags elf32_arm_section_flags
5791 #define elf_backend_fake_sections elf32_arm_fake_sections
5792 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
5793 #define elf_backend_final_write_processing elf32_arm_final_write_processing
5794 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
5795 #define elf_backend_symbol_processing elf32_arm_symbol_processing
5796 #define elf_backend_size_info elf32_arm_size_info
5797 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
5798 #define elf_backend_additional_program_headers \
5799 elf32_arm_additional_program_headers
5801 #define elf_backend_can_refcount 1
5802 #define elf_backend_can_gc_sections 1
5803 #define elf_backend_plt_readonly 1
5804 #define elf_backend_want_got_plt 1
5805 #define elf_backend_want_plt_sym 0
5806 #define elf_backend_may_use_rel_p 1
5807 #define elf_backend_may_use_rela_p 0
5808 #define elf_backend_default_use_rela_p 0
5809 #define elf_backend_rela_normal 0
5811 #define elf_backend_got_header_size 12
5813 #include "elf32-target.h"
5815 /* VxWorks Targets */
5817 #undef TARGET_LITTLE_SYM
5818 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
5819 #undef TARGET_LITTLE_NAME
5820 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
5821 #undef TARGET_BIG_SYM
5822 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
5823 #undef TARGET_BIG_NAME
5824 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
5826 /* Like elf32_arm_link_hash_table_create -- but overrides
5827 appropriately for VxWorks. */
5828 static struct bfd_link_hash_table *
5829 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
5831 struct bfd_link_hash_table *ret;
5833 ret = elf32_arm_link_hash_table_create (abfd);
5836 struct elf32_arm_link_hash_table *htab
5837 = (struct elf32_arm_link_hash_table *)ret;
5844 #define elf32_bed elf32_arm_vxworks_bed
5846 #undef bfd_elf32_bfd_link_hash_table_create
5847 #define bfd_elf32_bfd_link_hash_table_create \
5848 elf32_arm_vxworks_link_hash_table_create
5850 #undef elf_backend_may_use_rel_p
5851 #define elf_backend_may_use_rel_p 0
5852 #undef elf_backend_may_use_rela_p
5853 #define elf_backend_may_use_rela_p 1
5854 #undef elf_backend_default_use_rela_p
5855 #define elf_backend_default_use_rela_p 1
5856 #undef elf_backend_rela_normal
5857 #define elf_backend_rela_normal 1
5859 #include "elf32-target.h"
5862 /* Symbian OS Targets */
5864 #undef TARGET_LITTLE_SYM
5865 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5866 #undef TARGET_LITTLE_NAME
5867 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5868 #undef TARGET_BIG_SYM
5869 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5870 #undef TARGET_BIG_NAME
5871 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
5873 /* Like elf32_arm_link_hash_table_create -- but overrides
5874 appropriately for Symbian OS. */
5875 static struct bfd_link_hash_table *
5876 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
5878 struct bfd_link_hash_table *ret;
5880 ret = elf32_arm_link_hash_table_create (abfd);
5883 struct elf32_arm_link_hash_table *htab
5884 = (struct elf32_arm_link_hash_table *)ret;
5885 /* There is no PLT header for Symbian OS. */
5886 htab->plt_header_size = 0;
5887 /* The PLT entries are each three instructions. */
5888 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
5889 htab->symbian_p = 1;
5890 htab->root.is_relocatable_executable = 1;
5895 static struct bfd_elf_special_section const
5896 elf32_arm_symbian_special_sections[]=
5898 /* In a BPABI executable, the dynamic linking sections do not go in
5899 the loadable read-only segment. The post-linker may wish to
5900 refer to these sections, but they are not part of the final
5902 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
5903 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
5904 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
5905 { ".got", 4, 0, SHT_PROGBITS, 0 },
5906 { ".hash", 5, 0, SHT_HASH, 0 },
5907 /* These sections do not need to be writable as the SymbianOS
5908 postlinker will arrange things so that no dynamic relocation is
5910 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
5911 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
5912 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
5913 { NULL, 0, 0, 0, 0 }
5917 elf32_arm_symbian_begin_write_processing (bfd *abfd,
5918 struct bfd_link_info *link_info
5921 /* BPABI objects are never loaded directly by an OS kernel; they are
5922 processed by a postlinker first, into an OS-specific format. If
5923 the D_PAGED bit is set on the file, BFD will align segments on
5924 page boundaries, so that an OS can directly map the file. With
5925 BPABI objects, that just results in wasted space. In addition,
5926 because we clear the D_PAGED bit, map_sections_to_segments will
5927 recognize that the program headers should not be mapped into any
5928 loadable segment. */
5929 abfd->flags &= ~D_PAGED;
5933 elf32_arm_symbian_modify_segment_map (bfd *abfd,
5934 struct bfd_link_info *info)
5936 struct elf_segment_map *m;
5939 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5940 segment. However, because the .dynamic section is not marked
5941 with SEC_LOAD, the generic ELF code will not create such a
5943 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
5946 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
5947 m->next = elf_tdata (abfd)->segment_map;
5948 elf_tdata (abfd)->segment_map = m;
5951 /* Also call the generic arm routine. */
5952 return elf32_arm_modify_segment_map (abfd, info);
5956 #define elf32_bed elf32_arm_symbian_bed
5958 /* The dynamic sections are not allocated on SymbianOS; the postlinker
5959 will process them and then discard them. */
5960 #undef ELF_DYNAMIC_SEC_FLAGS
5961 #define ELF_DYNAMIC_SEC_FLAGS \
5962 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
5964 #undef bfd_elf32_bfd_link_hash_table_create
5965 #define bfd_elf32_bfd_link_hash_table_create \
5966 elf32_arm_symbian_link_hash_table_create
5968 #undef elf_backend_special_sections
5969 #define elf_backend_special_sections elf32_arm_symbian_special_sections
5971 #undef elf_backend_begin_write_processing
5972 #define elf_backend_begin_write_processing \
5973 elf32_arm_symbian_begin_write_processing
5975 #undef elf_backend_modify_segment_map
5976 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
5978 /* There is no .got section for BPABI objects, and hence no header. */
5979 #undef elf_backend_got_header_size
5980 #define elf_backend_got_header_size 0
5982 /* Similarly, there is no .got.plt section. */
5983 #undef elf_backend_want_got_plt
5984 #define elf_backend_want_got_plt 0
5986 #undef elf_backend_may_use_rel_p
5987 #define elf_backend_may_use_rel_p 1
5988 #undef elf_backend_may_use_rela_p
5989 #define elf_backend_may_use_rela_p 0
5990 #undef elf_backend_default_use_rela_p
5991 #define elf_backend_default_use_rela_p 0
5992 #undef elf_backend_rela_normal
5993 #define elf_backend_rela_normal 0
5995 #include "elf32-target.h"