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 /* The number of bytes in the initial entry in the PLT. */
1169 bfd_size_type plt_header_size;
1171 /* The number of bytes in the subsequent PLT etries. */
1172 bfd_size_type plt_entry_size;
1174 /* True if the target system is Symbian OS. */
1177 /* True if the target uses REL relocations. */
1180 /* Short-cuts to get to dynamic linker sections. */
1189 /* Small local sym to section mapping cache. */
1190 struct sym_sec_cache sym_sec;
1192 /* For convenience in allocate_dynrelocs. */
1196 /* Create an entry in an ARM ELF linker hash table. */
1198 static struct bfd_hash_entry *
1199 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1200 struct bfd_hash_table * table,
1201 const char * string)
1203 struct elf32_arm_link_hash_entry * ret =
1204 (struct elf32_arm_link_hash_entry *) entry;
1206 /* Allocate the structure if it has not already been allocated by a
1208 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1209 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1211 return (struct bfd_hash_entry *) ret;
1213 /* Call the allocation method of the superclass. */
1214 ret = ((struct elf32_arm_link_hash_entry *)
1215 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1219 ret->relocs_copied = NULL;
1220 ret->plt_thumb_refcount = 0;
1221 ret->plt_got_offset = -1;
1224 return (struct bfd_hash_entry *) ret;
1227 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1228 shortcuts to them in our hash table. */
1231 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1233 struct elf32_arm_link_hash_table *htab;
1235 htab = elf32_arm_hash_table (info);
1236 /* BPABI objects never have a GOT, or associated sections. */
1237 if (htab->symbian_p)
1240 if (! _bfd_elf_create_got_section (dynobj, info))
1243 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1244 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1245 if (!htab->sgot || !htab->sgotplt)
1248 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1249 if (htab->srelgot == NULL
1250 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1251 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1252 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1254 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1259 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1260 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1264 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1266 struct elf32_arm_link_hash_table *htab;
1268 htab = elf32_arm_hash_table (info);
1269 if (!htab->sgot && !create_got_section (dynobj, info))
1272 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1275 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1276 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1277 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1279 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1284 || (!info->shared && !htab->srelbss))
1290 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1293 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1294 struct elf_link_hash_entry *dir,
1295 struct elf_link_hash_entry *ind)
1297 struct elf32_arm_link_hash_entry *edir, *eind;
1299 edir = (struct elf32_arm_link_hash_entry *) dir;
1300 eind = (struct elf32_arm_link_hash_entry *) ind;
1302 if (eind->relocs_copied != NULL)
1304 if (edir->relocs_copied != NULL)
1306 struct elf32_arm_relocs_copied **pp;
1307 struct elf32_arm_relocs_copied *p;
1309 if (ind->root.type == bfd_link_hash_indirect)
1312 /* Add reloc counts against the weak sym to the strong sym
1313 list. Merge any entries against the same section. */
1314 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1316 struct elf32_arm_relocs_copied *q;
1318 for (q = edir->relocs_copied; q != NULL; q = q->next)
1319 if (q->section == p->section)
1321 q->count += p->count;
1328 *pp = edir->relocs_copied;
1331 edir->relocs_copied = eind->relocs_copied;
1332 eind->relocs_copied = NULL;
1335 /* If the direct symbol already has an associated PLT entry, the
1336 indirect symbol should not. If it doesn't, swap refcount information
1337 from the indirect symbol. */
1338 if (edir->plt_thumb_refcount == 0)
1340 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1341 eind->plt_thumb_refcount = 0;
1344 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1346 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1349 /* Create an ARM elf linker hash table. */
1351 static struct bfd_link_hash_table *
1352 elf32_arm_link_hash_table_create (bfd *abfd)
1354 struct elf32_arm_link_hash_table *ret;
1355 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1357 ret = bfd_malloc (amt);
1361 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1362 elf32_arm_link_hash_newfunc))
1369 ret->sgotplt = NULL;
1370 ret->srelgot = NULL;
1372 ret->srelplt = NULL;
1373 ret->sdynbss = NULL;
1374 ret->srelbss = NULL;
1375 ret->thumb_glue_size = 0;
1376 ret->arm_glue_size = 0;
1377 ret->bfd_of_glue_owner = NULL;
1378 ret->byteswap_code = 0;
1379 ret->target1_is_rel = 0;
1380 ret->target2_reloc = R_ARM_NONE;
1381 #ifdef FOUR_WORD_PLT
1382 ret->plt_header_size = 16;
1383 ret->plt_entry_size = 16;
1385 ret->plt_header_size = 20;
1386 ret->plt_entry_size = 12;
1390 ret->sym_sec.abfd = NULL;
1393 return &ret->root.root;
1396 /* Locate the Thumb encoded calling stub for NAME. */
1398 static struct elf_link_hash_entry *
1399 find_thumb_glue (struct bfd_link_info *link_info,
1404 struct elf_link_hash_entry *hash;
1405 struct elf32_arm_link_hash_table *hash_table;
1407 /* We need a pointer to the armelf specific hash table. */
1408 hash_table = elf32_arm_hash_table (link_info);
1410 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1411 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1413 BFD_ASSERT (tmp_name);
1415 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1417 hash = elf_link_hash_lookup
1418 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1421 /* xgettext:c-format */
1422 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1423 input_bfd, tmp_name, name);
1430 /* Locate the ARM encoded calling stub for NAME. */
1432 static struct elf_link_hash_entry *
1433 find_arm_glue (struct bfd_link_info *link_info,
1438 struct elf_link_hash_entry *myh;
1439 struct elf32_arm_link_hash_table *hash_table;
1441 /* We need a pointer to the elfarm specific hash table. */
1442 hash_table = elf32_arm_hash_table (link_info);
1444 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1445 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1447 BFD_ASSERT (tmp_name);
1449 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1451 myh = elf_link_hash_lookup
1452 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1455 /* xgettext:c-format */
1456 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1457 input_bfd, tmp_name, name);
1468 ldr r12, __func_addr
1471 .word func @ behave as if you saw a ARM_32 reloc. */
1473 #define ARM2THUMB_GLUE_SIZE 12
1474 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1475 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1476 static const insn32 a2t3_func_addr_insn = 0x00000001;
1478 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1482 __func_from_thumb: __func_from_thumb:
1484 nop ldr r6, __func_addr
1486 __func_change_to_arm: bx r6
1488 __func_back_to_thumb:
1494 #define THUMB2ARM_GLUE_SIZE 8
1495 static const insn16 t2a1_bx_pc_insn = 0x4778;
1496 static const insn16 t2a2_noop_insn = 0x46c0;
1497 static const insn32 t2a3_b_insn = 0xea000000;
1499 #ifndef ELFARM_NABI_C_INCLUDED
1501 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
1505 struct elf32_arm_link_hash_table * globals;
1507 globals = elf32_arm_hash_table (info);
1509 BFD_ASSERT (globals != NULL);
1511 if (globals->arm_glue_size != 0)
1513 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1515 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1516 ARM2THUMB_GLUE_SECTION_NAME);
1518 BFD_ASSERT (s != NULL);
1520 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
1522 s->size = globals->arm_glue_size;
1526 if (globals->thumb_glue_size != 0)
1528 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1530 s = bfd_get_section_by_name
1531 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1533 BFD_ASSERT (s != NULL);
1535 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
1537 s->size = globals->thumb_glue_size;
1545 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1546 struct elf_link_hash_entry * h)
1548 const char * name = h->root.root.string;
1551 struct elf_link_hash_entry * myh;
1552 struct bfd_link_hash_entry * bh;
1553 struct elf32_arm_link_hash_table * globals;
1556 globals = elf32_arm_hash_table (link_info);
1558 BFD_ASSERT (globals != NULL);
1559 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1561 s = bfd_get_section_by_name
1562 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1564 BFD_ASSERT (s != NULL);
1566 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1568 BFD_ASSERT (tmp_name);
1570 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1572 myh = elf_link_hash_lookup
1573 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
1577 /* We've already seen this guy. */
1582 /* The only trick here is using hash_table->arm_glue_size as the value.
1583 Even though the section isn't allocated yet, this is where we will be
1586 val = globals->arm_glue_size + 1;
1587 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1588 tmp_name, BSF_GLOBAL, s, val,
1589 NULL, TRUE, FALSE, &bh);
1591 myh = (struct elf_link_hash_entry *) bh;
1592 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1593 myh->forced_local = 1;
1597 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
1603 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1604 struct elf_link_hash_entry *h)
1606 const char *name = h->root.root.string;
1609 struct elf_link_hash_entry *myh;
1610 struct bfd_link_hash_entry *bh;
1611 struct elf32_arm_link_hash_table *hash_table;
1614 hash_table = elf32_arm_hash_table (link_info);
1616 BFD_ASSERT (hash_table != NULL);
1617 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1619 s = bfd_get_section_by_name
1620 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1622 BFD_ASSERT (s != NULL);
1624 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1625 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1627 BFD_ASSERT (tmp_name);
1629 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1631 myh = elf_link_hash_lookup
1632 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1636 /* We've already seen this guy. */
1642 val = hash_table->thumb_glue_size + 1;
1643 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1644 tmp_name, BSF_GLOBAL, s, val,
1645 NULL, TRUE, FALSE, &bh);
1647 /* If we mark it 'Thumb', the disassembler will do a better job. */
1648 myh = (struct elf_link_hash_entry *) bh;
1649 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
1650 myh->forced_local = 1;
1654 #define CHANGE_TO_ARM "__%s_change_to_arm"
1655 #define BACK_FROM_ARM "__%s_back_from_arm"
1657 /* Allocate another symbol to mark where we switch to Arm mode. */
1658 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1659 + strlen (CHANGE_TO_ARM) + 1);
1661 BFD_ASSERT (tmp_name);
1663 sprintf (tmp_name, CHANGE_TO_ARM, name);
1666 val = hash_table->thumb_glue_size + 4,
1667 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1668 tmp_name, BSF_LOCAL, s, val,
1669 NULL, TRUE, FALSE, &bh);
1673 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1678 /* Add the glue sections to ABFD. This function is called from the
1679 linker scripts in ld/emultempl/{armelf}.em. */
1682 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1683 struct bfd_link_info *info)
1688 /* If we are only performing a partial
1689 link do not bother adding the glue. */
1690 if (info->relocatable)
1693 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1697 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1698 will prevent elf_link_input_bfd() from processing the contents
1700 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
1702 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1705 || !bfd_set_section_flags (abfd, sec, flags)
1706 || !bfd_set_section_alignment (abfd, sec, 2))
1709 /* Set the gc mark to prevent the section from being removed by garbage
1710 collection, despite the fact that no relocs refer to this section. */
1714 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1718 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1719 | SEC_CODE | SEC_READONLY;
1721 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1724 || !bfd_set_section_flags (abfd, sec, flags)
1725 || !bfd_set_section_alignment (abfd, sec, 2))
1734 /* Select a BFD to be used to hold the sections used by the glue code.
1735 This function is called from the linker scripts in ld/emultempl/
1739 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
1741 struct elf32_arm_link_hash_table *globals;
1743 /* If we are only performing a partial link
1744 do not bother getting a bfd to hold the glue. */
1745 if (info->relocatable)
1748 /* Make sure we don't attach the glue sections to a dynamic object. */
1749 BFD_ASSERT (!(abfd->flags & DYNAMIC));
1751 globals = elf32_arm_hash_table (info);
1753 BFD_ASSERT (globals != NULL);
1755 if (globals->bfd_of_glue_owner != NULL)
1758 /* Save the bfd for later use. */
1759 globals->bfd_of_glue_owner = abfd;
1765 bfd_elf32_arm_process_before_allocation (bfd *abfd,
1766 struct bfd_link_info *link_info,
1769 Elf_Internal_Shdr *symtab_hdr;
1770 Elf_Internal_Rela *internal_relocs = NULL;
1771 Elf_Internal_Rela *irel, *irelend;
1772 bfd_byte *contents = NULL;
1775 struct elf32_arm_link_hash_table *globals;
1777 /* If we are only performing a partial link do not bother
1778 to construct any glue. */
1779 if (link_info->relocatable)
1782 /* Here we have a bfd that is to be included on the link. We have a hook
1783 to do reloc rummaging, before section sizes are nailed down. */
1784 globals = elf32_arm_hash_table (link_info);
1786 BFD_ASSERT (globals != NULL);
1787 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1789 if (byteswap_code && !bfd_big_endian (abfd))
1791 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1795 globals->byteswap_code = byteswap_code;
1797 /* Rummage around all the relocs and map the glue vectors. */
1798 sec = abfd->sections;
1803 for (; sec != NULL; sec = sec->next)
1805 if (sec->reloc_count == 0)
1808 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1810 /* Load the relocs. */
1812 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
1813 (Elf_Internal_Rela *) NULL, FALSE);
1815 if (internal_relocs == NULL)
1818 irelend = internal_relocs + sec->reloc_count;
1819 for (irel = internal_relocs; irel < irelend; irel++)
1822 unsigned long r_index;
1824 struct elf_link_hash_entry *h;
1826 r_type = ELF32_R_TYPE (irel->r_info);
1827 r_index = ELF32_R_SYM (irel->r_info);
1829 /* These are the only relocation types we care about. */
1830 if ( r_type != R_ARM_PC24
1831 && r_type != R_ARM_PLT32
1833 && r_type != R_ARM_CALL
1834 && r_type != R_ARM_JUMP24
1836 && r_type != R_ARM_THM_PC22)
1839 /* Get the section contents if we haven't done so already. */
1840 if (contents == NULL)
1842 /* Get cached copy if it exists. */
1843 if (elf_section_data (sec)->this_hdr.contents != NULL)
1844 contents = elf_section_data (sec)->this_hdr.contents;
1847 /* Go get them off disk. */
1848 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
1853 /* If the relocation is not against a symbol it cannot concern us. */
1856 /* We don't care about local symbols. */
1857 if (r_index < symtab_hdr->sh_info)
1860 /* This is an external symbol. */
1861 r_index -= symtab_hdr->sh_info;
1862 h = (struct elf_link_hash_entry *)
1863 elf_sym_hashes (abfd)[r_index];
1865 /* If the relocation is against a static symbol it must be within
1866 the current section and so cannot be a cross ARM/Thumb relocation. */
1870 /* If the call will go through a PLT entry then we do not need
1872 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
1882 /* This one is a call from arm code. We need to look up
1883 the target of the call. If it is a thumb target, we
1885 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
1886 record_arm_to_thumb_glue (link_info, h);
1889 case R_ARM_THM_PC22:
1890 /* This one is a call from thumb code. We look
1891 up the target of the call. If it is not a thumb
1892 target, we insert glue. */
1893 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
1894 record_thumb_to_arm_glue (link_info, h);
1902 if (contents != NULL
1903 && elf_section_data (sec)->this_hdr.contents != contents)
1907 if (internal_relocs != NULL
1908 && elf_section_data (sec)->relocs != internal_relocs)
1909 free (internal_relocs);
1910 internal_relocs = NULL;
1916 if (contents != NULL
1917 && elf_section_data (sec)->this_hdr.contents != contents)
1919 if (internal_relocs != NULL
1920 && elf_section_data (sec)->relocs != internal_relocs)
1921 free (internal_relocs);
1929 /* Set target relocation values needed during linking. */
1932 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
1934 char * target2_type)
1936 struct elf32_arm_link_hash_table *globals;
1938 globals = elf32_arm_hash_table (link_info);
1940 globals->target1_is_rel = target1_is_rel;
1941 if (strcmp (target2_type, "rel") == 0)
1942 globals->target2_reloc = R_ARM_REL32;
1943 else if (strcmp (target2_type, "abs") == 0)
1944 globals->target2_reloc = R_ARM_ABS32;
1945 else if (strcmp (target2_type, "got-rel") == 0)
1946 globals->target2_reloc = R_ARM_GOT_PREL;
1949 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
1955 /* The thumb form of a long branch is a bit finicky, because the offset
1956 encoding is split over two fields, each in it's own instruction. They
1957 can occur in any order. So given a thumb form of long branch, and an
1958 offset, insert the offset into the thumb branch and return finished
1961 It takes two thumb instructions to encode the target address. Each has
1962 11 bits to invest. The upper 11 bits are stored in one (identified by
1963 H-0.. see below), the lower 11 bits are stored in the other (identified
1966 Combine together and shifted left by 1 (it's a half word address) and
1970 H-0, upper address-0 = 000
1972 H-1, lower address-0 = 800
1974 They can be ordered either way, but the arm tools I've seen always put
1975 the lower one first. It probably doesn't matter. krk@cygnus.com
1977 XXX: Actually the order does matter. The second instruction (H-1)
1978 moves the computed address into the PC, so it must be the second one
1979 in the sequence. The problem, however is that whilst little endian code
1980 stores the instructions in HI then LOW order, big endian code does the
1981 reverse. nickc@cygnus.com. */
1983 #define LOW_HI_ORDER 0xF800F000
1984 #define HI_LOW_ORDER 0xF000F800
1987 insert_thumb_branch (insn32 br_insn, int rel_off)
1989 unsigned int low_bits;
1990 unsigned int high_bits;
1992 BFD_ASSERT ((rel_off & 1) != 1);
1994 rel_off >>= 1; /* Half word aligned address. */
1995 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
1996 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
1998 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
1999 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2000 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2001 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2003 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2004 abort (); /* Error - not a valid branch instruction form. */
2009 /* Thumb code calling an ARM function. */
2012 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2016 asection * input_section,
2017 bfd_byte * hit_data,
2020 bfd_signed_vma addend,
2025 unsigned long int tmp;
2026 long int ret_offset;
2027 struct elf_link_hash_entry * myh;
2028 struct elf32_arm_link_hash_table * globals;
2030 myh = find_thumb_glue (info, name, input_bfd);
2034 globals = elf32_arm_hash_table (info);
2036 BFD_ASSERT (globals != NULL);
2037 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2039 my_offset = myh->root.u.def.value;
2041 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2042 THUMB2ARM_GLUE_SECTION_NAME);
2044 BFD_ASSERT (s != NULL);
2045 BFD_ASSERT (s->contents != NULL);
2046 BFD_ASSERT (s->output_section != NULL);
2048 if ((my_offset & 0x01) == 0x01)
2051 && sym_sec->owner != NULL
2052 && !INTERWORK_FLAG (sym_sec->owner))
2054 (*_bfd_error_handler)
2055 (_("%B(%s): warning: interworking not enabled.\n"
2056 " first occurrence: %B: thumb call to arm"),
2057 sym_sec->owner, input_bfd, name);
2063 myh->root.u.def.value = my_offset;
2065 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2066 s->contents + my_offset);
2068 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2069 s->contents + my_offset + 2);
2072 /* Address of destination of the stub. */
2073 ((bfd_signed_vma) val)
2075 /* Offset from the start of the current section
2076 to the start of the stubs. */
2078 /* Offset of the start of this stub from the start of the stubs. */
2080 /* Address of the start of the current section. */
2081 + s->output_section->vma)
2082 /* The branch instruction is 4 bytes into the stub. */
2084 /* ARM branches work from the pc of the instruction + 8. */
2087 bfd_put_32 (output_bfd,
2088 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2089 s->contents + my_offset + 4);
2092 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2094 /* Now go back and fix up the original BL insn to point to here. */
2096 /* Address of where the stub is located. */
2097 (s->output_section->vma + s->output_offset + my_offset)
2098 /* Address of where the BL is located. */
2099 - (input_section->output_section->vma + input_section->output_offset
2101 /* Addend in the relocation. */
2103 /* Biassing for PC-relative addressing. */
2106 tmp = bfd_get_32 (input_bfd, hit_data
2107 - input_section->vma);
2109 bfd_put_32 (output_bfd,
2110 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2111 hit_data - input_section->vma);
2116 /* Arm code calling a Thumb function. */
2119 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2123 asection * input_section,
2124 bfd_byte * hit_data,
2127 bfd_signed_vma addend,
2130 unsigned long int tmp;
2133 long int ret_offset;
2134 struct elf_link_hash_entry * myh;
2135 struct elf32_arm_link_hash_table * globals;
2137 myh = find_arm_glue (info, name, input_bfd);
2141 globals = elf32_arm_hash_table (info);
2143 BFD_ASSERT (globals != NULL);
2144 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2146 my_offset = myh->root.u.def.value;
2147 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2148 ARM2THUMB_GLUE_SECTION_NAME);
2149 BFD_ASSERT (s != NULL);
2150 BFD_ASSERT (s->contents != NULL);
2151 BFD_ASSERT (s->output_section != NULL);
2153 if ((my_offset & 0x01) == 0x01)
2156 && sym_sec->owner != NULL
2157 && !INTERWORK_FLAG (sym_sec->owner))
2159 (*_bfd_error_handler)
2160 (_("%B(%s): warning: interworking not enabled.\n"
2161 " first occurrence: %B: arm call to thumb"),
2162 sym_sec->owner, input_bfd, name);
2166 myh->root.u.def.value = my_offset;
2168 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2169 s->contents + my_offset);
2171 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2172 s->contents + my_offset + 4);
2174 /* It's a thumb address. Add the low order bit. */
2175 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2176 s->contents + my_offset + 8);
2179 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2181 tmp = bfd_get_32 (input_bfd, hit_data);
2182 tmp = tmp & 0xFF000000;
2184 /* Somehow these are both 4 too far, so subtract 8. */
2185 ret_offset = (s->output_offset
2187 + s->output_section->vma
2188 - (input_section->output_offset
2189 + input_section->output_section->vma
2193 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2195 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2202 /* Some relocations map to different relocations depending on the
2203 target. Return the real relocation. */
2205 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2211 if (globals->target1_is_rel)
2217 return globals->target2_reloc;
2223 #endif /* OLD_ARM_ABI */
2226 /* Perform a relocation as part of a final link. */
2228 static bfd_reloc_status_type
2229 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2232 asection * input_section,
2233 bfd_byte * contents,
2234 Elf_Internal_Rela * rel,
2236 struct bfd_link_info * info,
2238 const char * sym_name,
2240 struct elf_link_hash_entry * h)
2242 unsigned long r_type = howto->type;
2243 unsigned long r_symndx;
2244 bfd_byte * hit_data = contents + rel->r_offset;
2245 bfd * dynobj = NULL;
2246 Elf_Internal_Shdr * symtab_hdr;
2247 struct elf_link_hash_entry ** sym_hashes;
2248 bfd_vma * local_got_offsets;
2249 asection * sgot = NULL;
2250 asection * splt = NULL;
2251 asection * sreloc = NULL;
2253 bfd_signed_vma signed_addend;
2254 struct elf32_arm_link_hash_table * globals;
2256 globals = elf32_arm_hash_table (info);
2259 /* Some relocation type map to different relocations depending on the
2260 target. We pick the right one here. */
2261 r_type = arm_real_reloc_type (globals, r_type);
2262 if (r_type != howto->type)
2263 howto = elf32_arm_howto_from_type (r_type);
2264 #endif /* OLD_ARM_ABI */
2266 /* If the start address has been set, then set the EF_ARM_HASENTRY
2267 flag. Setting this more than once is redundant, but the cost is
2268 not too high, and it keeps the code simple.
2270 The test is done here, rather than somewhere else, because the
2271 start address is only set just before the final link commences.
2273 Note - if the user deliberately sets a start address of 0, the
2274 flag will not be set. */
2275 if (bfd_get_start_address (output_bfd) != 0)
2276 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2278 dynobj = elf_hash_table (info)->dynobj;
2281 sgot = bfd_get_section_by_name (dynobj, ".got");
2282 splt = bfd_get_section_by_name (dynobj, ".plt");
2284 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2285 sym_hashes = elf_sym_hashes (input_bfd);
2286 local_got_offsets = elf_local_got_offsets (input_bfd);
2287 r_symndx = ELF32_R_SYM (rel->r_info);
2289 if (globals->use_rel)
2291 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2293 if (addend & ((howto->src_mask + 1) >> 1))
2296 signed_addend &= ~ howto->src_mask;
2297 signed_addend |= addend;
2300 signed_addend = addend;
2303 addend = signed_addend = rel->r_addend;
2308 return bfd_reloc_ok;
2320 /* r_symndx will be zero only for relocs against symbols
2321 from removed linkonce sections, or sections discarded by
2324 return bfd_reloc_ok;
2326 /* Handle relocations which should use the PLT entry. ABS32/REL32
2327 will use the symbol's value, which may point to a PLT entry, but we
2328 don't need to handle that here. If we created a PLT entry, all
2329 branches in this object should go to it. */
2330 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2333 && h->plt.offset != (bfd_vma) -1)
2335 /* If we've created a .plt section, and assigned a PLT entry to
2336 this function, it should not be known to bind locally. If
2337 it were, we would have cleared the PLT entry. */
2338 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2340 value = (splt->output_section->vma
2341 + splt->output_offset
2343 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2344 contents, rel->r_offset, value,
2348 /* When generating a shared object, these relocations are copied
2349 into the output file to be resolved at run time. */
2351 && (input_section->flags & SEC_ALLOC)
2352 && (r_type != R_ARM_REL32
2353 || !SYMBOL_CALLS_LOCAL (info, h))
2355 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2356 || h->root.type != bfd_link_hash_undefweak)
2357 && r_type != R_ARM_PC24
2359 && r_type != R_ARM_CALL
2360 && r_type != R_ARM_JUMP24
2361 && r_type != R_ARM_PREL31
2363 && r_type != R_ARM_PLT32)
2365 Elf_Internal_Rela outrel;
2367 bfd_boolean skip, relocate;
2373 name = (bfd_elf_string_from_elf_section
2375 elf_elfheader (input_bfd)->e_shstrndx,
2376 elf_section_data (input_section)->rel_hdr.sh_name));
2378 return bfd_reloc_notsupported;
2380 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2381 && strcmp (bfd_get_section_name (input_bfd,
2385 sreloc = bfd_get_section_by_name (dynobj, name);
2386 BFD_ASSERT (sreloc != NULL);
2393 _bfd_elf_section_offset (output_bfd, info, input_section,
2395 if (outrel.r_offset == (bfd_vma) -1)
2397 else if (outrel.r_offset == (bfd_vma) -2)
2398 skip = TRUE, relocate = TRUE;
2399 outrel.r_offset += (input_section->output_section->vma
2400 + input_section->output_offset);
2403 memset (&outrel, 0, sizeof outrel);
2408 || !h->def_regular))
2409 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2414 /* This symbol is local, or marked to become local. */
2416 if (sym_flags == STT_ARM_TFUNC)
2418 if (globals->symbian_p)
2420 /* On Symbian OS, the data segment and text segement
2421 can be relocated independently. Therefore, we
2422 must indicate the segment to which this
2423 relocation is relative. The BPABI allows us to
2424 use any symbol in the right segment; we just use
2425 the section symbol as it is convenient. (We
2426 cannot use the symbol given by "h" directly as it
2427 will not appear in the dynamic symbol table.) */
2428 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2429 BFD_ASSERT (symbol != 0);
2432 /* On SVR4-ish systems, the dynamic loader cannot
2433 relocate the text and data segments independently,
2434 so the symbol does not matter. */
2436 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2439 loc = sreloc->contents;
2440 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2441 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2443 /* If this reloc is against an external symbol, we do not want to
2444 fiddle with the addend. Otherwise, we need to include the symbol
2445 value so that it becomes an addend for the dynamic reloc. */
2447 return bfd_reloc_ok;
2449 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2450 contents, rel->r_offset, value,
2453 else switch (r_type)
2456 case R_ARM_XPC25: /* Arm BLX instruction. */
2460 case R_ARM_PC24: /* Arm B/BL instruction */
2463 if (r_type == R_ARM_XPC25)
2465 /* Check for Arm calling Arm function. */
2466 /* FIXME: Should we translate the instruction into a BL
2467 instruction instead ? */
2468 if (sym_flags != STT_ARM_TFUNC)
2469 (*_bfd_error_handler)
2470 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2472 h ? h->root.root.string : "(local)");
2477 /* Check for Arm calling Thumb function. */
2478 if (sym_flags == STT_ARM_TFUNC)
2480 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2481 output_bfd, input_section,
2482 hit_data, sym_sec, rel->r_offset,
2483 signed_addend, value);
2484 return bfd_reloc_ok;
2488 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2490 S is the address of the symbol in the relocation.
2491 P is address of the instruction being relocated.
2492 A is the addend (extracted from the instruction) in bytes.
2494 S is held in 'value'.
2495 P is the base address of the section containing the
2496 instruction plus the offset of the reloc into that
2498 (input_section->output_section->vma +
2499 input_section->output_offset +
2501 A is the addend, converted into bytes, ie:
2504 Note: None of these operations have knowledge of the pipeline
2505 size of the processor, thus it is up to the assembler to
2506 encode this information into the addend. */
2507 value -= (input_section->output_section->vma
2508 + input_section->output_offset);
2509 value -= rel->r_offset;
2510 if (globals->use_rel)
2511 value += (signed_addend << howto->size);
2513 /* RELA addends do not have to be adjusted by howto->size. */
2514 value += signed_addend;
2516 signed_addend = value;
2517 signed_addend >>= howto->rightshift;
2519 /* It is not an error for an undefined weak reference to be
2520 out of range. Any program that branches to such a symbol
2521 is going to crash anyway, so there is no point worrying
2522 about getting the destination exactly right. */
2523 if (! h || h->root.type != bfd_link_hash_undefweak)
2525 /* Perform a signed range check. */
2526 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2527 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2528 return bfd_reloc_overflow;
2532 /* If necessary set the H bit in the BLX instruction. */
2533 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2534 value = (signed_addend & howto->dst_mask)
2535 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2539 value = (signed_addend & howto->dst_mask)
2540 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2545 if (sym_flags == STT_ARM_TFUNC)
2550 value -= (input_section->output_section->vma
2551 + input_section->output_offset + rel->r_offset);
2557 value -= (input_section->output_section->vma
2558 + input_section->output_offset + rel->r_offset);
2559 value += signed_addend;
2560 if (! h || h->root.type != bfd_link_hash_undefweak)
2562 /* Check for overflow */
2563 if ((value ^ (value >> 1)) & (1 << 30))
2564 return bfd_reloc_overflow;
2566 value &= 0x7fffffff;
2567 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2568 if (sym_flags == STT_ARM_TFUNC)
2574 bfd_put_32 (input_bfd, value, hit_data);
2575 return bfd_reloc_ok;
2579 if ((long) value > 0x7f || (long) value < -0x80)
2580 return bfd_reloc_overflow;
2582 bfd_put_8 (input_bfd, value, hit_data);
2583 return bfd_reloc_ok;
2588 if ((long) value > 0x7fff || (long) value < -0x8000)
2589 return bfd_reloc_overflow;
2591 bfd_put_16 (input_bfd, value, hit_data);
2592 return bfd_reloc_ok;
2595 /* Support ldr and str instruction for the arm */
2596 /* Also thumb b (unconditional branch). ??? Really? */
2599 if ((long) value > 0x7ff || (long) value < -0x800)
2600 return bfd_reloc_overflow;
2602 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2603 bfd_put_32 (input_bfd, value, hit_data);
2604 return bfd_reloc_ok;
2606 case R_ARM_THM_ABS5:
2607 /* Support ldr and str instructions for the thumb. */
2608 if (globals->use_rel)
2610 /* Need to refetch addend. */
2611 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2612 /* ??? Need to determine shift amount from operand size. */
2613 addend >>= howto->rightshift;
2617 /* ??? Isn't value unsigned? */
2618 if ((long) value > 0x1f || (long) value < -0x10)
2619 return bfd_reloc_overflow;
2621 /* ??? Value needs to be properly shifted into place first. */
2622 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2623 bfd_put_16 (input_bfd, value, hit_data);
2624 return bfd_reloc_ok;
2627 case R_ARM_THM_XPC22:
2629 case R_ARM_THM_PC22:
2630 /* Thumb BL (branch long instruction). */
2633 bfd_boolean overflow = FALSE;
2634 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2635 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2636 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2637 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2639 bfd_signed_vma signed_check;
2641 /* Need to refetch the addend and squish the two 11 bit pieces
2643 if (globals->use_rel)
2645 bfd_vma upper = upper_insn & 0x7ff;
2646 bfd_vma lower = lower_insn & 0x7ff;
2647 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2648 addend = (upper << 12) | (lower << 1);
2649 signed_addend = addend;
2652 if (r_type == R_ARM_THM_XPC22)
2654 /* Check for Thumb to Thumb call. */
2655 /* FIXME: Should we translate the instruction into a BL
2656 instruction instead ? */
2657 if (sym_flags == STT_ARM_TFUNC)
2658 (*_bfd_error_handler)
2659 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2661 h ? h->root.root.string : "(local)");
2666 /* If it is not a call to Thumb, assume call to Arm.
2667 If it is a call relative to a section name, then it is not a
2668 function call at all, but rather a long jump. Calls through
2669 the PLT do not require stubs. */
2670 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2671 && (h == NULL || splt == NULL
2672 || h->plt.offset == (bfd_vma) -1))
2674 if (elf32_thumb_to_arm_stub
2675 (info, sym_name, input_bfd, output_bfd, input_section,
2676 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2677 return bfd_reloc_ok;
2679 return bfd_reloc_dangerous;
2683 /* Handle calls via the PLT. */
2684 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2686 value = (splt->output_section->vma
2687 + splt->output_offset
2689 /* Target the Thumb stub before the ARM PLT entry. */
2693 relocation = value + signed_addend;
2695 relocation -= (input_section->output_section->vma
2696 + input_section->output_offset
2699 check = relocation >> howto->rightshift;
2701 /* If this is a signed value, the rightshift just dropped
2702 leading 1 bits (assuming twos complement). */
2703 if ((bfd_signed_vma) relocation >= 0)
2704 signed_check = check;
2706 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2708 /* Assumes two's complement. */
2709 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2713 if (r_type == R_ARM_THM_XPC22
2714 && ((lower_insn & 0x1800) == 0x0800))
2715 /* For a BLX instruction, make sure that the relocation is rounded up
2716 to a word boundary. This follows the semantics of the instruction
2717 which specifies that bit 1 of the target address will come from bit
2718 1 of the base address. */
2719 relocation = (relocation + 2) & ~ 3;
2721 /* Put RELOCATION back into the insn. */
2722 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
2723 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
2725 /* Put the relocated value back in the object file: */
2726 bfd_put_16 (input_bfd, upper_insn, hit_data);
2727 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
2729 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
2733 case R_ARM_THM_PC11:
2734 /* Thumb B (branch) instruction). */
2736 bfd_signed_vma relocation;
2737 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
2738 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2739 bfd_signed_vma signed_check;
2741 if (globals->use_rel)
2743 /* Need to refetch addend. */
2744 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2745 if (addend & ((howto->src_mask + 1) >> 1))
2748 signed_addend &= ~ howto->src_mask;
2749 signed_addend |= addend;
2752 signed_addend = addend;
2753 /* The value in the insn has been right shifted. We need to
2754 undo this, so that we can perform the address calculation
2755 in terms of bytes. */
2756 signed_addend <<= howto->rightshift;
2758 relocation = value + signed_addend;
2760 relocation -= (input_section->output_section->vma
2761 + input_section->output_offset
2764 relocation >>= howto->rightshift;
2765 signed_check = relocation;
2766 relocation &= howto->dst_mask;
2767 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
2769 bfd_put_16 (input_bfd, relocation, hit_data);
2771 /* Assumes two's complement. */
2772 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2773 return bfd_reloc_overflow;
2775 return bfd_reloc_ok;
2779 case R_ARM_ALU_PCREL7_0:
2780 case R_ARM_ALU_PCREL15_8:
2781 case R_ARM_ALU_PCREL23_15:
2786 insn = bfd_get_32 (input_bfd, hit_data);
2787 if (globals->use_rel)
2789 /* Extract the addend. */
2790 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
2791 signed_addend = addend;
2793 relocation = value + signed_addend;
2795 relocation -= (input_section->output_section->vma
2796 + input_section->output_offset
2798 insn = (insn & ~0xfff)
2799 | ((howto->bitpos << 7) & 0xf00)
2800 | ((relocation >> howto->bitpos) & 0xff);
2801 bfd_put_32 (input_bfd, value, hit_data);
2803 return bfd_reloc_ok;
2806 case R_ARM_GNU_VTINHERIT:
2807 case R_ARM_GNU_VTENTRY:
2808 return bfd_reloc_ok;
2811 return bfd_reloc_notsupported;
2813 case R_ARM_GLOB_DAT:
2814 return bfd_reloc_notsupported;
2816 case R_ARM_JUMP_SLOT:
2817 return bfd_reloc_notsupported;
2819 case R_ARM_RELATIVE:
2820 return bfd_reloc_notsupported;
2823 /* Relocation is relative to the start of the
2824 global offset table. */
2826 BFD_ASSERT (sgot != NULL);
2828 return bfd_reloc_notsupported;
2830 /* If we are addressing a Thumb function, we need to adjust the
2831 address by one, so that attempts to call the function pointer will
2832 correctly interpret it as Thumb code. */
2833 if (sym_flags == STT_ARM_TFUNC)
2836 /* Note that sgot->output_offset is not involved in this
2837 calculation. We always want the start of .got. If we
2838 define _GLOBAL_OFFSET_TABLE in a different way, as is
2839 permitted by the ABI, we might have to change this
2841 value -= sgot->output_section->vma;
2842 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2843 contents, rel->r_offset, value,
2847 /* Use global offset table as symbol value. */
2848 BFD_ASSERT (sgot != NULL);
2851 return bfd_reloc_notsupported;
2853 value = sgot->output_section->vma;
2854 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2855 contents, rel->r_offset, value,
2860 case R_ARM_GOT_PREL:
2862 /* Relocation is to the entry for this symbol in the
2863 global offset table. */
2865 return bfd_reloc_notsupported;
2872 off = h->got.offset;
2873 BFD_ASSERT (off != (bfd_vma) -1);
2874 dyn = globals->root.dynamic_sections_created;
2876 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2878 && SYMBOL_REFERENCES_LOCAL (info, h))
2879 || (ELF_ST_VISIBILITY (h->other)
2880 && h->root.type == bfd_link_hash_undefweak))
2882 /* This is actually a static link, or it is a -Bsymbolic link
2883 and the symbol is defined locally. We must initialize this
2884 entry in the global offset table. Since the offset must
2885 always be a multiple of 4, we use the least significant bit
2886 to record whether we have initialized it already.
2888 When doing a dynamic link, we create a .rel.got relocation
2889 entry to initialize the value. This is done in the
2890 finish_dynamic_symbol routine. */
2895 /* If we are addressing a Thumb function, we need to
2896 adjust the address by one, so that attempts to
2897 call the function pointer will correctly
2898 interpret it as Thumb code. */
2899 if (sym_flags == STT_ARM_TFUNC)
2902 bfd_put_32 (output_bfd, value, sgot->contents + off);
2907 value = sgot->output_offset + off;
2913 BFD_ASSERT (local_got_offsets != NULL &&
2914 local_got_offsets[r_symndx] != (bfd_vma) -1);
2916 off = local_got_offsets[r_symndx];
2918 /* The offset must always be a multiple of 4. We use the
2919 least significant bit to record whether we have already
2920 generated the necessary reloc. */
2925 /* If we are addressing a Thumb function, we need to
2926 adjust the address by one, so that attempts to
2927 call the function pointer will correctly
2928 interpret it as Thumb code. */
2929 if (sym_flags == STT_ARM_TFUNC)
2932 bfd_put_32 (output_bfd, value, sgot->contents + off);
2937 Elf_Internal_Rela outrel;
2940 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2941 BFD_ASSERT (srelgot != NULL);
2943 outrel.r_offset = (sgot->output_section->vma
2944 + sgot->output_offset
2946 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2947 loc = srelgot->contents;
2948 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2949 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2952 local_got_offsets[r_symndx] |= 1;
2955 value = sgot->output_offset + off;
2957 if (r_type != R_ARM_GOT32)
2958 value += sgot->output_section->vma;
2960 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2961 contents, rel->r_offset, value,
2965 return bfd_reloc_notsupported;
2967 case R_ARM_AMP_VCALL9:
2968 return bfd_reloc_notsupported;
2970 case R_ARM_RSBREL32:
2971 return bfd_reloc_notsupported;
2973 case R_ARM_THM_RPC22:
2974 return bfd_reloc_notsupported;
2977 return bfd_reloc_notsupported;
2980 return bfd_reloc_notsupported;
2983 return bfd_reloc_notsupported;
2986 return bfd_reloc_notsupported;
2989 return bfd_reloc_notsupported;
2993 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
2995 arm_add_to_rel (bfd * abfd,
2997 reloc_howto_type * howto,
2998 bfd_signed_vma increment)
3000 bfd_signed_vma addend;
3002 if (howto->type == R_ARM_THM_PC22)
3004 int upper_insn, lower_insn;
3007 upper_insn = bfd_get_16 (abfd, address);
3008 lower_insn = bfd_get_16 (abfd, address + 2);
3009 upper = upper_insn & 0x7ff;
3010 lower = lower_insn & 0x7ff;
3012 addend = (upper << 12) | (lower << 1);
3013 addend += increment;
3016 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3017 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3019 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3020 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3026 contents = bfd_get_32 (abfd, address);
3028 /* Get the (signed) value from the instruction. */
3029 addend = contents & howto->src_mask;
3030 if (addend & ((howto->src_mask + 1) >> 1))
3032 bfd_signed_vma mask;
3035 mask &= ~ howto->src_mask;
3039 /* Add in the increment, (which is a byte value). */
3040 switch (howto->type)
3043 addend += increment;
3051 addend <<= howto->size;
3052 addend += increment;
3054 /* Should we check for overflow here ? */
3056 /* Drop any undesired bits. */
3057 addend >>= howto->rightshift;
3061 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3063 bfd_put_32 (abfd, contents, address);
3067 /* Relocate an ARM ELF section. */
3069 elf32_arm_relocate_section (bfd * output_bfd,
3070 struct bfd_link_info * info,
3072 asection * input_section,
3073 bfd_byte * contents,
3074 Elf_Internal_Rela * relocs,
3075 Elf_Internal_Sym * local_syms,
3076 asection ** local_sections)
3078 Elf_Internal_Shdr *symtab_hdr;
3079 struct elf_link_hash_entry **sym_hashes;
3080 Elf_Internal_Rela *rel;
3081 Elf_Internal_Rela *relend;
3083 struct elf32_arm_link_hash_table * globals;
3085 globals = elf32_arm_hash_table (info);
3086 if (info->relocatable && !globals->use_rel)
3089 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3090 sym_hashes = elf_sym_hashes (input_bfd);
3093 relend = relocs + input_section->reloc_count;
3094 for (; rel < relend; rel++)
3097 reloc_howto_type * howto;
3098 unsigned long r_symndx;
3099 Elf_Internal_Sym * sym;
3101 struct elf_link_hash_entry * h;
3103 bfd_reloc_status_type r;
3106 r_symndx = ELF32_R_SYM (rel->r_info);
3107 r_type = ELF32_R_TYPE (rel->r_info);
3108 r_type = arm_real_reloc_type (globals, r_type);
3110 if ( r_type == R_ARM_GNU_VTENTRY
3111 || r_type == R_ARM_GNU_VTINHERIT)
3114 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3115 howto = bfd_reloc.howto;
3117 if (info->relocatable && globals->use_rel)
3119 /* This is a relocatable link. We don't have to change
3120 anything, unless the reloc is against a section symbol,
3121 in which case we have to adjust according to where the
3122 section symbol winds up in the output section. */
3123 if (r_symndx < symtab_hdr->sh_info)
3125 sym = local_syms + r_symndx;
3126 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3128 sec = local_sections[r_symndx];
3129 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3131 (bfd_signed_vma) (sec->output_offset
3139 /* This is a final link. */
3144 if (r_symndx < symtab_hdr->sh_info)
3146 sym = local_syms + r_symndx;
3147 sec = local_sections[r_symndx];
3148 if (globals->use_rel)
3150 relocation = (sec->output_section->vma
3151 + sec->output_offset
3153 if ((sec->flags & SEC_MERGE)
3154 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3157 bfd_vma addend, value;
3159 if (howto->rightshift)
3161 (*_bfd_error_handler)
3162 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3163 input_bfd, input_section,
3164 (long) rel->r_offset, howto->name);
3168 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3170 /* Get the (signed) value from the instruction. */
3171 addend = value & howto->src_mask;
3172 if (addend & ((howto->src_mask + 1) >> 1))
3174 bfd_signed_vma mask;
3177 mask &= ~ howto->src_mask;
3182 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3184 addend += msec->output_section->vma + msec->output_offset;
3185 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3186 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3190 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3195 bfd_boolean unresolved_reloc;
3197 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3198 r_symndx, symtab_hdr, sym_hashes,
3200 unresolved_reloc, warned);
3202 if (unresolved_reloc || relocation != 0)
3204 /* In these cases, we don't need the relocation value.
3205 We check specially because in some obscure cases
3206 sec->output_section will be NULL. */
3216 case R_ARM_THM_PC22:
3220 && ((!info->symbolic && h->dynindx != -1)
3222 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3223 && ((input_section->flags & SEC_ALLOC) != 0
3224 /* DWARF will emit R_ARM_ABS32 relocations in its
3225 sections against symbols defined externally
3226 in shared libraries. We can't do anything
3228 || ((input_section->flags & SEC_DEBUGGING) != 0
3240 case R_ARM_GOT_PREL:
3242 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
3243 (elf_hash_table (info)->dynamic_sections_created,
3246 || (!info->symbolic && h->dynindx != -1)
3247 || !h->def_regular))
3252 if (unresolved_reloc)
3254 (_("%B(%A): warning: unresolvable relocation %d against symbol `%s'"),
3255 input_bfd, input_section,
3257 h->root.root.string);
3264 name = h->root.root.string;
3267 name = (bfd_elf_string_from_elf_section
3268 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3269 if (name == NULL || *name == '\0')
3270 name = bfd_section_name (input_bfd, sec);
3273 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3274 input_section, contents, rel,
3275 relocation, info, sec, name,
3276 (h ? ELF_ST_TYPE (h->type) :
3277 ELF_ST_TYPE (sym->st_info)), h);
3279 if (r != bfd_reloc_ok)
3281 const char * msg = (const char *) 0;
3285 case bfd_reloc_overflow:
3286 /* If the overflowing reloc was to an undefined symbol,
3287 we have already printed one error message and there
3288 is no point complaining again. */
3290 h->root.type != bfd_link_hash_undefined)
3291 && (!((*info->callbacks->reloc_overflow)
3292 (info, (h ? &h->root : NULL), name, howto->name,
3293 (bfd_vma) 0, input_bfd, input_section,
3298 case bfd_reloc_undefined:
3299 if (!((*info->callbacks->undefined_symbol)
3300 (info, name, input_bfd, input_section,
3301 rel->r_offset, TRUE)))
3305 case bfd_reloc_outofrange:
3306 msg = _("internal error: out of range error");
3309 case bfd_reloc_notsupported:
3310 msg = _("internal error: unsupported relocation error");
3313 case bfd_reloc_dangerous:
3314 msg = _("internal error: dangerous error");
3318 msg = _("internal error: unknown error");
3322 if (!((*info->callbacks->warning)
3323 (info, msg, name, input_bfd, input_section,
3334 /* Set the right machine number. */
3337 elf32_arm_object_p (bfd *abfd)
3341 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3343 if (mach != bfd_mach_arm_unknown)
3344 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3346 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3347 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3350 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3355 /* Function to keep ARM specific flags in the ELF header. */
3358 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3360 if (elf_flags_init (abfd)
3361 && elf_elfheader (abfd)->e_flags != flags)
3363 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3365 if (flags & EF_ARM_INTERWORK)
3366 (*_bfd_error_handler)
3367 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3371 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3377 elf_elfheader (abfd)->e_flags = flags;
3378 elf_flags_init (abfd) = TRUE;
3384 /* Copy backend specific data from one object module to another. */
3387 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3392 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3393 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3396 in_flags = elf_elfheader (ibfd)->e_flags;
3397 out_flags = elf_elfheader (obfd)->e_flags;
3399 if (elf_flags_init (obfd)
3400 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3401 && in_flags != out_flags)
3403 /* Cannot mix APCS26 and APCS32 code. */
3404 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3407 /* Cannot mix float APCS and non-float APCS code. */
3408 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3411 /* If the src and dest have different interworking flags
3412 then turn off the interworking bit. */
3413 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3415 if (out_flags & EF_ARM_INTERWORK)
3417 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3420 in_flags &= ~EF_ARM_INTERWORK;
3423 /* Likewise for PIC, though don't warn for this case. */
3424 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3425 in_flags &= ~EF_ARM_PIC;
3428 elf_elfheader (obfd)->e_flags = in_flags;
3429 elf_flags_init (obfd) = TRUE;
3431 /* Also copy the EI_OSABI field. */
3432 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3433 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3438 /* Merge backend specific data from an object file to the output
3439 object file when linking. */
3442 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3446 bfd_boolean flags_compatible = TRUE;
3449 /* Check if we have the same endianess. */
3450 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3453 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3454 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3457 /* The input BFD must have had its flags initialised. */
3458 /* The following seems bogus to me -- The flags are initialized in
3459 the assembler but I don't think an elf_flags_init field is
3460 written into the object. */
3461 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3463 in_flags = elf_elfheader (ibfd)->e_flags;
3464 out_flags = elf_elfheader (obfd)->e_flags;
3466 if (!elf_flags_init (obfd))
3468 /* If the input is the default architecture and had the default
3469 flags then do not bother setting the flags for the output
3470 architecture, instead allow future merges to do this. If no
3471 future merges ever set these flags then they will retain their
3472 uninitialised values, which surprise surprise, correspond
3473 to the default values. */
3474 if (bfd_get_arch_info (ibfd)->the_default
3475 && elf_elfheader (ibfd)->e_flags == 0)
3478 elf_flags_init (obfd) = TRUE;
3479 elf_elfheader (obfd)->e_flags = in_flags;
3481 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3482 && bfd_get_arch_info (obfd)->the_default)
3483 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3488 /* Determine what should happen if the input ARM architecture
3489 does not match the output ARM architecture. */
3490 if (! bfd_arm_merge_machines (ibfd, obfd))
3493 /* Identical flags must be compatible. */
3494 if (in_flags == out_flags)
3497 /* Check to see if the input BFD actually contains any sections. If
3498 not, its flags may not have been initialised either, but it
3499 cannot actually cause any incompatibility. Do not short-circuit
3500 dynamic objects; their section list may be emptied by
3501 elf_link_add_object_symbols.
3503 Also check to see if there are no code sections in the input.
3504 In this case there is no need to check for code specific flags.
3505 XXX - do we need to worry about floating-point format compatability
3506 in data sections ? */
3507 if (!(ibfd->flags & DYNAMIC))
3509 bfd_boolean null_input_bfd = TRUE;
3510 bfd_boolean only_data_sections = TRUE;
3512 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3514 /* Ignore synthetic glue sections. */
3515 if (strcmp (sec->name, ".glue_7")
3516 && strcmp (sec->name, ".glue_7t"))
3518 if ((bfd_get_section_flags (ibfd, sec)
3519 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3520 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3521 only_data_sections = FALSE;
3523 null_input_bfd = FALSE;
3528 if (null_input_bfd || only_data_sections)
3532 /* Complain about various flag mismatches. */
3533 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
3536 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
3538 (in_flags & EF_ARM_EABIMASK) >> 24,
3539 (out_flags & EF_ARM_EABIMASK) >> 24);
3543 /* Not sure what needs to be checked for EABI versions >= 1. */
3544 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
3546 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3549 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3551 in_flags & EF_ARM_APCS_26 ? 26 : 32,
3552 out_flags & EF_ARM_APCS_26 ? 26 : 32);
3553 flags_compatible = FALSE;
3556 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3558 if (in_flags & EF_ARM_APCS_FLOAT)
3560 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3564 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3567 flags_compatible = FALSE;
3570 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
3572 if (in_flags & EF_ARM_VFP_FLOAT)
3574 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3578 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3581 flags_compatible = FALSE;
3584 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
3586 if (in_flags & EF_ARM_MAVERICK_FLOAT)
3588 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3592 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3595 flags_compatible = FALSE;
3598 #ifdef EF_ARM_SOFT_FLOAT
3599 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
3601 /* We can allow interworking between code that is VFP format
3602 layout, and uses either soft float or integer regs for
3603 passing floating point arguments and results. We already
3604 know that the APCS_FLOAT flags match; similarly for VFP
3606 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
3607 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
3609 if (in_flags & EF_ARM_SOFT_FLOAT)
3611 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3615 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3618 flags_compatible = FALSE;
3623 /* Interworking mismatch is only a warning. */
3624 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3626 if (in_flags & EF_ARM_INTERWORK)
3629 (_("Warning: %B supports interworking, whereas %B does not"),
3635 (_("Warning: %B does not support interworking, whereas %B does"),
3641 return flags_compatible;
3644 /* Display the flags field. */
3647 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
3649 FILE * file = (FILE *) ptr;
3650 unsigned long flags;
3652 BFD_ASSERT (abfd != NULL && ptr != NULL);
3654 /* Print normal ELF private data. */
3655 _bfd_elf_print_private_bfd_data (abfd, ptr);
3657 flags = elf_elfheader (abfd)->e_flags;
3658 /* Ignore init flag - it may not be set, despite the flags field
3659 containing valid data. */
3661 /* xgettext:c-format */
3662 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3664 switch (EF_ARM_EABI_VERSION (flags))
3666 case EF_ARM_EABI_UNKNOWN:
3667 /* The following flag bits are GNU extensions and not part of the
3668 official ARM ELF extended ABI. Hence they are only decoded if
3669 the EABI version is not set. */
3670 if (flags & EF_ARM_INTERWORK)
3671 fprintf (file, _(" [interworking enabled]"));
3673 if (flags & EF_ARM_APCS_26)
3674 fprintf (file, " [APCS-26]");
3676 fprintf (file, " [APCS-32]");
3678 if (flags & EF_ARM_VFP_FLOAT)
3679 fprintf (file, _(" [VFP float format]"));
3680 else if (flags & EF_ARM_MAVERICK_FLOAT)
3681 fprintf (file, _(" [Maverick float format]"));
3683 fprintf (file, _(" [FPA float format]"));
3685 if (flags & EF_ARM_APCS_FLOAT)
3686 fprintf (file, _(" [floats passed in float registers]"));
3688 if (flags & EF_ARM_PIC)
3689 fprintf (file, _(" [position independent]"));
3691 if (flags & EF_ARM_NEW_ABI)
3692 fprintf (file, _(" [new ABI]"));
3694 if (flags & EF_ARM_OLD_ABI)
3695 fprintf (file, _(" [old ABI]"));
3697 if (flags & EF_ARM_SOFT_FLOAT)
3698 fprintf (file, _(" [software FP]"));
3700 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
3701 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
3702 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
3703 | EF_ARM_MAVERICK_FLOAT);
3706 case EF_ARM_EABI_VER1:
3707 fprintf (file, _(" [Version1 EABI]"));
3709 if (flags & EF_ARM_SYMSARESORTED)
3710 fprintf (file, _(" [sorted symbol table]"));
3712 fprintf (file, _(" [unsorted symbol table]"));
3714 flags &= ~ EF_ARM_SYMSARESORTED;
3717 case EF_ARM_EABI_VER2:
3718 fprintf (file, _(" [Version2 EABI]"));
3720 if (flags & EF_ARM_SYMSARESORTED)
3721 fprintf (file, _(" [sorted symbol table]"));
3723 fprintf (file, _(" [unsorted symbol table]"));
3725 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
3726 fprintf (file, _(" [dynamic symbols use segment index]"));
3728 if (flags & EF_ARM_MAPSYMSFIRST)
3729 fprintf (file, _(" [mapping symbols precede others]"));
3731 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
3732 | EF_ARM_MAPSYMSFIRST);
3735 case EF_ARM_EABI_VER3:
3736 fprintf (file, _(" [Version3 EABI]"));
3739 case EF_ARM_EABI_VER4:
3740 fprintf (file, _(" [Version4 EABI]"));
3742 if (flags & EF_ARM_BE8)
3743 fprintf (file, _(" [BE8]"));
3745 if (flags & EF_ARM_LE8)
3746 fprintf (file, _(" [LE8]"));
3748 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
3752 fprintf (file, _(" <EABI version unrecognised>"));
3756 flags &= ~ EF_ARM_EABIMASK;
3758 if (flags & EF_ARM_RELEXEC)
3759 fprintf (file, _(" [relocatable executable]"));
3761 if (flags & EF_ARM_HASENTRY)
3762 fprintf (file, _(" [has entry point]"));
3764 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
3767 fprintf (file, _("<Unrecognised flag bits set>"));
3775 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
3777 switch (ELF_ST_TYPE (elf_sym->st_info))
3780 return ELF_ST_TYPE (elf_sym->st_info);
3783 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3784 This allows us to distinguish between data used by Thumb instructions
3785 and non-data (which is probably code) inside Thumb regions of an
3787 if (type != STT_OBJECT)
3788 return ELF_ST_TYPE (elf_sym->st_info);
3799 elf32_arm_gc_mark_hook (asection * sec,
3800 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3801 Elf_Internal_Rela * rel,
3802 struct elf_link_hash_entry * h,
3803 Elf_Internal_Sym * sym)
3807 switch (ELF32_R_TYPE (rel->r_info))
3809 case R_ARM_GNU_VTINHERIT:
3810 case R_ARM_GNU_VTENTRY:
3814 switch (h->root.type)
3816 case bfd_link_hash_defined:
3817 case bfd_link_hash_defweak:
3818 return h->root.u.def.section;
3820 case bfd_link_hash_common:
3821 return h->root.u.c.p->section;
3829 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3834 /* Update the got entry reference counts for the section being removed. */
3837 elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
3838 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3839 asection * sec ATTRIBUTE_UNUSED,
3840 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
3842 Elf_Internal_Shdr *symtab_hdr;
3843 struct elf_link_hash_entry **sym_hashes;
3844 bfd_signed_vma *local_got_refcounts;
3845 const Elf_Internal_Rela *rel, *relend;
3846 unsigned long r_symndx;
3847 struct elf_link_hash_entry *h;
3848 struct elf32_arm_link_hash_table * globals;
3850 globals = elf32_arm_hash_table (info);
3852 elf_section_data (sec)->local_dynrel = NULL;
3854 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3855 sym_hashes = elf_sym_hashes (abfd);
3856 local_got_refcounts = elf_local_got_refcounts (abfd);
3858 relend = relocs + sec->reloc_count;
3859 for (rel = relocs; rel < relend; rel++)
3863 r_type = ELF32_R_TYPE (rel->r_info);
3865 r_type = arm_real_reloc_type (globals, r_type);
3871 case R_ARM_GOT_PREL:
3873 r_symndx = ELF32_R_SYM (rel->r_info);
3874 if (r_symndx >= symtab_hdr->sh_info)
3876 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3877 if (h->got.refcount > 0)
3878 h->got.refcount -= 1;
3880 else if (local_got_refcounts != NULL)
3882 if (local_got_refcounts[r_symndx] > 0)
3883 local_got_refcounts[r_symndx] -= 1;
3896 case R_ARM_THM_PC22:
3897 /* Should the interworking branches be here also? */
3899 r_symndx = ELF32_R_SYM (rel->r_info);
3900 if (r_symndx >= symtab_hdr->sh_info)
3902 struct elf32_arm_link_hash_entry *eh;
3903 struct elf32_arm_relocs_copied **pp;
3904 struct elf32_arm_relocs_copied *p;
3906 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3907 eh = (struct elf32_arm_link_hash_entry *) h;
3909 if (h->plt.refcount > 0)
3911 h->plt.refcount -= 1;
3912 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
3913 eh->plt_thumb_refcount--;
3916 if (r_type == R_ARM_ABS32
3917 || r_type == R_ARM_REL32)
3919 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
3921 if (p->section == sec)
3940 /* Look through the relocs for a section during the first phase. */
3943 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
3944 asection *sec, const Elf_Internal_Rela *relocs)
3946 Elf_Internal_Shdr *symtab_hdr;
3947 struct elf_link_hash_entry **sym_hashes;
3948 struct elf_link_hash_entry **sym_hashes_end;
3949 const Elf_Internal_Rela *rel;
3950 const Elf_Internal_Rela *rel_end;
3953 bfd_vma *local_got_offsets;
3954 struct elf32_arm_link_hash_table *htab;
3956 if (info->relocatable)
3959 htab = elf32_arm_hash_table (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, and this is a reloc
4083 against a global symbol, or a non PC relative reloc
4084 against a local symbol, then we need to copy the reloc
4085 into the shared library. However, if we are linking with
4086 -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. */
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;
4355 dynobj = elf_hash_table (info)->dynobj;
4357 /* Make sure we know what is going on here. */
4358 BFD_ASSERT (dynobj != NULL
4360 || h->u.weakdef != NULL
4363 && !h->def_regular)));
4365 eh = (struct elf32_arm_link_hash_entry *) h;
4367 /* If this is a function, put it in the procedure linkage table. We
4368 will fill in the contents of the procedure linkage table later,
4369 when we know the address of the .got section. */
4370 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
4373 if (h->plt.refcount <= 0
4374 || SYMBOL_CALLS_LOCAL (info, h)
4375 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4376 && h->root.type == bfd_link_hash_undefweak))
4378 /* This case can occur if we saw a PLT32 reloc in an input
4379 file, but the symbol was never referred to by a dynamic
4380 object, or if all references were garbage collected. In
4381 such a case, we don't actually need to build a procedure
4382 linkage table, and we can just do a PC24 reloc instead. */
4383 h->plt.offset = (bfd_vma) -1;
4384 eh->plt_thumb_refcount = 0;
4392 /* It's possible that we incorrectly decided a .plt reloc was
4393 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4394 in check_relocs. We can't decide accurately between function
4395 and non-function syms in check-relocs; Objects loaded later in
4396 the link may change h->type. So fix it now. */
4397 h->plt.offset = (bfd_vma) -1;
4398 eh->plt_thumb_refcount = 0;
4401 /* If this is a weak symbol, and there is a real definition, the
4402 processor independent code will have arranged for us to see the
4403 real definition first, and we can just use the same value. */
4404 if (h->u.weakdef != NULL)
4406 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4407 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4408 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4409 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4413 /* This is a reference to a symbol defined by a dynamic object which
4414 is not a function. */
4416 /* If we are creating a shared library, we must presume that the
4417 only references to the symbol are via the global offset table.
4418 For such cases we need not do anything here; the relocations will
4419 be handled correctly by relocate_section. */
4423 /* We must allocate the symbol in our .dynbss section, which will
4424 become part of the .bss section of the executable. There will be
4425 an entry for this symbol in the .dynsym section. The dynamic
4426 object will contain position independent code, so all references
4427 from the dynamic object to this symbol will go through the global
4428 offset table. The dynamic linker will use the .dynsym entry to
4429 determine the address it must put in the global offset table, so
4430 both the dynamic object and the regular object will refer to the
4431 same memory location for the variable. */
4432 s = bfd_get_section_by_name (dynobj, ".dynbss");
4433 BFD_ASSERT (s != NULL);
4435 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4436 copy the initial value out of the dynamic object and into the
4437 runtime process image. We need to remember the offset into the
4438 .rel.bss section we are going to use. */
4439 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4443 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
4444 BFD_ASSERT (srel != NULL);
4445 srel->size += sizeof (Elf32_External_Rel);
4449 /* We need to figure out the alignment required for this symbol. I
4450 have no idea how ELF linkers handle this. */
4451 power_of_two = bfd_log2 (h->size);
4452 if (power_of_two > 3)
4455 /* Apply the required alignment. */
4456 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4457 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4459 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4463 /* Define the symbol as being at this point in the section. */
4464 h->root.u.def.section = s;
4465 h->root.u.def.value = s->size;
4467 /* Increment the section size to make room for the symbol. */
4473 /* Allocate space in .plt, .got and associated reloc sections for
4477 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
4479 struct bfd_link_info *info;
4480 struct elf32_arm_link_hash_table *htab;
4481 struct elf32_arm_link_hash_entry *eh;
4482 struct elf32_arm_relocs_copied *p;
4484 eh = (struct elf32_arm_link_hash_entry *) h;
4486 if (h->root.type == bfd_link_hash_indirect)
4489 if (h->root.type == bfd_link_hash_warning)
4490 /* When warning symbols are created, they **replace** the "real"
4491 entry in the hash table, thus we never get to see the real
4492 symbol in a hash traversal. So look at it now. */
4493 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4495 info = (struct bfd_link_info *) inf;
4496 htab = elf32_arm_hash_table (info);
4498 if (htab->root.dynamic_sections_created
4499 && h->plt.refcount > 0)
4501 /* Make sure this symbol is output as a dynamic symbol.
4502 Undefined weak syms won't yet be marked as dynamic. */
4503 if (h->dynindx == -1
4504 && !h->forced_local)
4506 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4511 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4513 asection *s = htab->splt;
4515 /* If this is the first .plt entry, make room for the special
4518 s->size += htab->plt_header_size;
4520 h->plt.offset = s->size;
4522 /* If we will insert a Thumb trampoline before this PLT, leave room
4524 if (!htab->symbian_p && eh->plt_thumb_refcount > 0)
4526 h->plt.offset += PLT_THUMB_STUB_SIZE;
4527 s->size += PLT_THUMB_STUB_SIZE;
4530 /* If this symbol is not defined in a regular file, and we are
4531 not generating a shared library, then set the symbol to this
4532 location in the .plt. This is required to make function
4533 pointers compare as equal between the normal executable and
4534 the shared library. */
4538 h->root.u.def.section = s;
4539 h->root.u.def.value = h->plt.offset;
4541 /* Make sure the function is not marked as Thumb, in case
4542 it is the target of an ABS32 relocation, which will
4543 point to the PLT entry. */
4544 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
4545 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
4548 /* Make room for this entry. */
4549 s->size += htab->plt_entry_size;
4551 if (!htab->symbian_p)
4553 /* We also need to make an entry in the .got.plt section, which
4554 will be placed in the .got section by the linker script. */
4555 eh->plt_got_offset = htab->sgotplt->size;
4556 htab->sgotplt->size += 4;
4559 /* We also need to make an entry in the .rel.plt section. */
4560 htab->srelplt->size += sizeof (Elf32_External_Rel);
4564 h->plt.offset = (bfd_vma) -1;
4570 h->plt.offset = (bfd_vma) -1;
4574 if (h->got.refcount > 0)
4579 /* Make sure this symbol is output as a dynamic symbol.
4580 Undefined weak syms won't yet be marked as dynamic. */
4581 if (h->dynindx == -1
4582 && !h->forced_local)
4584 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4588 if (!htab->symbian_p)
4591 h->got.offset = s->size;
4593 dyn = htab->root.dynamic_sections_created;
4594 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4595 || h->root.type != bfd_link_hash_undefweak)
4597 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
4598 htab->srelgot->size += sizeof (Elf32_External_Rel);
4602 h->got.offset = (bfd_vma) -1;
4604 if (eh->relocs_copied == NULL)
4607 /* In the shared -Bsymbolic case, discard space allocated for
4608 dynamic pc-relative relocs against symbols which turn out to be
4609 defined in regular objects. For the normal shared case, discard
4610 space for pc-relative relocs that have become local due to symbol
4611 visibility changes. */
4615 /* Discard relocs on undefined weak syms with non-default
4617 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4618 && h->root.type == bfd_link_hash_undefweak)
4619 eh->relocs_copied = NULL;
4623 /* For the non-shared case, discard space for relocs against
4624 symbols which turn out to need copy relocs or are not
4630 || (htab->root.dynamic_sections_created
4631 && (h->root.type == bfd_link_hash_undefweak
4632 || h->root.type == bfd_link_hash_undefined))))
4634 /* Make sure this symbol is output as a dynamic symbol.
4635 Undefined weak syms won't yet be marked as dynamic. */
4636 if (h->dynindx == -1
4637 && !h->forced_local)
4639 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4643 /* If that succeeded, we know we'll be keeping all the
4645 if (h->dynindx != -1)
4649 eh->relocs_copied = NULL;
4654 /* Finally, allocate space. */
4655 for (p = eh->relocs_copied; p != NULL; p = p->next)
4657 asection *sreloc = elf_section_data (p->section)->sreloc;
4658 sreloc->size += p->count * sizeof (Elf32_External_Rel);
4664 /* Find any dynamic relocs that apply to read-only sections. */
4667 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
4669 struct elf32_arm_link_hash_entry *eh;
4670 struct elf32_arm_relocs_copied *p;
4672 if (h->root.type == bfd_link_hash_warning)
4673 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4675 eh = (struct elf32_arm_link_hash_entry *) h;
4676 for (p = eh->relocs_copied; p != NULL; p = p->next)
4678 asection *s = p->section;
4680 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4682 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4684 info->flags |= DF_TEXTREL;
4686 /* Not an error, just cut short the traversal. */
4693 /* Set the sizes of the dynamic sections. */
4696 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4697 struct bfd_link_info * info)
4704 struct elf32_arm_link_hash_table *htab;
4706 htab = elf32_arm_hash_table (info);
4707 dynobj = elf_hash_table (info)->dynobj;
4708 BFD_ASSERT (dynobj != NULL);
4710 if (elf_hash_table (info)->dynamic_sections_created)
4712 /* Set the contents of the .interp section to the interpreter. */
4713 if (info->executable)
4715 s = bfd_get_section_by_name (dynobj, ".interp");
4716 BFD_ASSERT (s != NULL);
4717 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4718 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4722 /* Set up .got offsets for local syms, and space for local dynamic
4724 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4726 bfd_signed_vma *local_got;
4727 bfd_signed_vma *end_local_got;
4728 char *local_tls_type;
4729 bfd_size_type locsymcount;
4730 Elf_Internal_Shdr *symtab_hdr;
4733 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4736 for (s = ibfd->sections; s != NULL; s = s->next)
4738 struct elf32_arm_relocs_copied *p;
4740 for (p = *((struct elf32_arm_relocs_copied **)
4741 &elf_section_data (s)->local_dynrel);
4745 if (!bfd_is_abs_section (p->section)
4746 && bfd_is_abs_section (p->section->output_section))
4748 /* Input section has been discarded, either because
4749 it is a copy of a linkonce section or due to
4750 linker script /DISCARD/, so we'll be discarding
4753 else if (p->count != 0)
4755 srel = elf_section_data (p->section)->sreloc;
4756 srel->size += p->count * sizeof (Elf32_External_Rel);
4757 if ((p->section->output_section->flags & SEC_READONLY) != 0)
4758 info->flags |= DF_TEXTREL;
4763 local_got = elf_local_got_refcounts (ibfd);
4767 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4768 locsymcount = symtab_hdr->sh_info;
4769 end_local_got = local_got + locsymcount;
4771 srel = htab->srelgot;
4772 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
4776 *local_got = s->size;
4779 srel->size += sizeof (Elf32_External_Rel);
4782 *local_got = (bfd_vma) -1;
4786 /* Allocate global sym .plt and .got entries, and space for global
4787 sym dynamic relocs. */
4788 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
4790 /* The check_relocs and adjust_dynamic_symbol entry points have
4791 determined the sizes of the various dynamic sections. Allocate
4795 for (s = dynobj->sections; s != NULL; s = s->next)
4800 if ((s->flags & SEC_LINKER_CREATED) == 0)
4803 /* It's OK to base decisions on the section name, because none
4804 of the dynobj section names depend upon the input files. */
4805 name = bfd_get_section_name (dynobj, s);
4809 if (strcmp (name, ".plt") == 0)
4813 /* Strip this section if we don't need it; see the
4819 /* Remember whether there is a PLT. */
4823 else if (strncmp (name, ".rel", 4) == 0)
4827 /* If we don't need this section, strip it from the
4828 output file. This is mostly to handle .rel.bss and
4829 .rel.plt. We must create both sections in
4830 create_dynamic_sections, because they must be created
4831 before the linker maps input sections to output
4832 sections. The linker does that before
4833 adjust_dynamic_symbol is called, and it is that
4834 function which decides whether anything needs to go
4835 into these sections. */
4840 /* Remember whether there are any reloc sections other
4842 if (strcmp (name, ".rel.plt") != 0)
4845 /* We use the reloc_count field as a counter if we need
4846 to copy relocs into the output file. */
4850 else if (strncmp (name, ".got", 4) != 0)
4852 /* It's not one of our sections, so don't allocate space. */
4858 _bfd_strip_section_from_output (info, s);
4862 /* Allocate memory for the section contents. */
4863 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4864 if (s->contents == NULL && s->size != 0)
4868 if (elf_hash_table (info)->dynamic_sections_created)
4870 /* Add some entries to the .dynamic section. We fill in the
4871 values later, in elf32_arm_finish_dynamic_sections, but we
4872 must add the entries now so that we get the correct size for
4873 the .dynamic section. The DT_DEBUG entry is filled in by the
4874 dynamic linker and used by the debugger. */
4875 #define add_dynamic_entry(TAG, VAL) \
4876 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4880 if (!add_dynamic_entry (DT_DEBUG, 0))
4886 if ( !add_dynamic_entry (DT_PLTGOT, 0)
4887 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4888 || !add_dynamic_entry (DT_PLTREL, DT_REL)
4889 || !add_dynamic_entry (DT_JMPREL, 0))
4895 if ( !add_dynamic_entry (DT_REL, 0)
4896 || !add_dynamic_entry (DT_RELSZ, 0)
4897 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
4901 /* If any dynamic relocs apply to a read-only section,
4902 then we need a DT_TEXTREL entry. */
4903 if ((info->flags & DF_TEXTREL) == 0)
4904 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
4907 if ((info->flags & DF_TEXTREL) != 0)
4909 if (!add_dynamic_entry (DT_TEXTREL, 0))
4911 info->flags |= DF_TEXTREL;
4914 #undef add_synamic_entry
4919 /* Finish up dynamic symbol handling. We set the contents of various
4920 dynamic sections here. */
4923 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
4924 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
4927 struct elf32_arm_link_hash_table *htab;
4928 struct elf32_arm_link_hash_entry *eh;
4930 dynobj = elf_hash_table (info)->dynobj;
4931 htab = elf32_arm_hash_table (info);
4932 eh = (struct elf32_arm_link_hash_entry *) h;
4934 if (h->plt.offset != (bfd_vma) -1)
4940 Elf_Internal_Rela rel;
4942 /* This symbol has an entry in the procedure linkage table. Set
4945 BFD_ASSERT (h->dynindx != -1);
4947 splt = bfd_get_section_by_name (dynobj, ".plt");
4948 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
4949 BFD_ASSERT (splt != NULL && srel != NULL);
4951 /* Fill in the entry in the procedure linkage table. */
4952 if (htab->symbian_p)
4955 for (i = 0; i < htab->plt_entry_size / 4; ++i)
4956 bfd_put_32 (output_bfd,
4957 elf32_arm_symbian_plt_entry[i],
4958 splt->contents + h->plt.offset + 4 * i);
4960 /* Fill in the entry in the .rel.plt section. */
4961 rel.r_offset = (splt->output_section->vma
4962 + splt->output_offset
4963 + h->plt.offset + 4 * (i - 1));
4964 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
4966 /* Get the index in the procedure linkage table which
4967 corresponds to this symbol. This is the index of this symbol
4968 in all the symbols for which we are making plt entries. The
4969 first entry in the procedure linkage table is reserved. */
4970 plt_index = ((h->plt.offset - htab->plt_header_size)
4971 / htab->plt_entry_size);
4976 bfd_vma got_displacement;
4979 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4980 BFD_ASSERT (sgot != NULL);
4982 /* Get the offset into the .got.plt table of the entry that
4983 corresponds to this function. */
4984 got_offset = eh->plt_got_offset;
4986 /* Get the index in the procedure linkage table which
4987 corresponds to this symbol. This is the index of this symbol
4988 in all the symbols for which we are making plt entries. The
4989 first three entries in .got.plt are reserved; after that
4990 symbols appear in the same order as in .plt. */
4991 plt_index = (got_offset - 12) / 4;
4993 /* Calculate the displacement between the PLT slot and the
4994 entry in the GOT. The eight-byte offset accounts for the
4995 value produced by adding to pc in the first instruction
4997 got_displacement = (sgot->output_section->vma
4998 + sgot->output_offset
5000 - splt->output_section->vma
5001 - splt->output_offset
5005 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5007 if (eh->plt_thumb_refcount > 0)
5009 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5010 splt->contents + h->plt.offset - 4);
5011 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5012 splt->contents + h->plt.offset - 2);
5015 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5016 splt->contents + h->plt.offset + 0);
5017 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5018 splt->contents + h->plt.offset + 4);
5019 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5020 splt->contents + h->plt.offset + 8);
5021 #ifdef FOUR_WORD_PLT
5022 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5023 splt->contents + h->plt.offset + 12);
5026 /* Fill in the entry in the global offset table. */
5027 bfd_put_32 (output_bfd,
5028 (splt->output_section->vma
5029 + splt->output_offset),
5030 sgot->contents + got_offset);
5032 /* Fill in the entry in the .rel.plt section. */
5033 rel.r_offset = (sgot->output_section->vma
5034 + sgot->output_offset
5036 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5039 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5040 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5042 if (!h->def_regular)
5044 /* Mark the symbol as undefined, rather than as defined in
5045 the .plt section. Leave the value alone. */
5046 sym->st_shndx = SHN_UNDEF;
5047 /* If the symbol is weak, we do need to clear the value.
5048 Otherwise, the PLT entry would provide a definition for
5049 the symbol even if the symbol wasn't defined anywhere,
5050 and so the symbol would never be NULL. */
5051 if (!h->ref_regular_nonweak)
5056 if (h->got.offset != (bfd_vma) -1)
5060 Elf_Internal_Rela rel;
5063 /* This symbol has an entry in the global offset table. Set it
5065 sgot = bfd_get_section_by_name (dynobj, ".got");
5066 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5067 BFD_ASSERT (sgot != NULL && srel != NULL);
5069 rel.r_offset = (sgot->output_section->vma
5070 + sgot->output_offset
5071 + (h->got.offset &~ (bfd_vma) 1));
5073 /* If this is a static link, or it is a -Bsymbolic link and the
5074 symbol is defined locally or was forced to be local because
5075 of a version file, we just want to emit a RELATIVE reloc.
5076 The entry in the global offset table will already have been
5077 initialized in the relocate_section function. */
5079 && SYMBOL_REFERENCES_LOCAL (info, h))
5081 BFD_ASSERT((h->got.offset & 1) != 0);
5082 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5086 BFD_ASSERT((h->got.offset & 1) == 0);
5087 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5088 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5091 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5092 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5098 Elf_Internal_Rela rel;
5101 /* This symbol needs a copy reloc. Set it up. */
5102 BFD_ASSERT (h->dynindx != -1
5103 && (h->root.type == bfd_link_hash_defined
5104 || h->root.type == bfd_link_hash_defweak));
5106 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5108 BFD_ASSERT (s != NULL);
5110 rel.r_offset = (h->root.u.def.value
5111 + h->root.u.def.section->output_section->vma
5112 + h->root.u.def.section->output_offset);
5113 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5114 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5115 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5118 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5119 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5120 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5121 sym->st_shndx = SHN_ABS;
5126 /* Finish up the dynamic sections. */
5129 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5135 dynobj = elf_hash_table (info)->dynobj;
5137 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5138 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5139 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5141 if (elf_hash_table (info)->dynamic_sections_created)
5144 Elf32_External_Dyn *dyncon, *dynconend;
5145 struct elf32_arm_link_hash_table *htab;
5147 htab = elf32_arm_hash_table (info);
5148 splt = bfd_get_section_by_name (dynobj, ".plt");
5149 BFD_ASSERT (splt != NULL && sdyn != NULL);
5151 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5152 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5154 for (; dyncon < dynconend; dyncon++)
5156 Elf_Internal_Dyn dyn;
5160 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5171 goto get_vma_if_bpabi;
5174 goto get_vma_if_bpabi;
5177 goto get_vma_if_bpabi;
5179 name = ".gnu.version";
5180 goto get_vma_if_bpabi;
5182 name = ".gnu.version_d";
5183 goto get_vma_if_bpabi;
5185 name = ".gnu.version_r";
5186 goto get_vma_if_bpabi;
5194 s = bfd_get_section_by_name (output_bfd, name);
5195 BFD_ASSERT (s != NULL);
5196 if (!htab->symbian_p)
5197 dyn.d_un.d_ptr = s->vma;
5199 /* In the BPABI, tags in the PT_DYNAMIC section point
5200 at the file offset, not the memory address, for the
5201 convenience of the post linker. */
5202 dyn.d_un.d_ptr = s->filepos;
5203 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5207 if (htab->symbian_p)
5212 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5213 BFD_ASSERT (s != NULL);
5214 dyn.d_un.d_val = s->size;
5215 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5219 if (!htab->symbian_p)
5221 /* My reading of the SVR4 ABI indicates that the
5222 procedure linkage table relocs (DT_JMPREL) should be
5223 included in the overall relocs (DT_REL). This is
5224 what Solaris does. However, UnixWare can not handle
5225 that case. Therefore, we override the DT_RELSZ entry
5226 here to make it not include the JMPREL relocs. Since
5227 the linker script arranges for .rel.plt to follow all
5228 other relocation sections, we don't have to worry
5229 about changing the DT_REL entry. */
5230 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5232 dyn.d_un.d_val -= s->size;
5233 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5241 /* In the BPABI, the DT_REL tag must point at the file
5242 offset, not the VMA, of the first relocation
5243 section. So, we use code similar to that in
5244 elflink.c, but do not check for SHF_ALLOC on the
5245 relcoation section, since relocations sections are
5246 never allocated under the BPABI. The comments above
5247 about Unixware notwithstanding, we include all of the
5248 relocations here. */
5249 if (htab->symbian_p)
5252 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5253 ? SHT_REL : SHT_RELA);
5255 for (i = 1; i < elf_numsections (output_bfd); i++)
5257 Elf_Internal_Shdr *hdr
5258 = elf_elfsections (output_bfd)[i];
5259 if (hdr->sh_type == type)
5261 if (dyn.d_tag == DT_RELSZ
5262 || dyn.d_tag == DT_RELASZ)
5263 dyn.d_un.d_val += hdr->sh_size;
5264 else if ((ufile_ptr) hdr->sh_offset
5265 <= dyn.d_un.d_val - 1)
5266 dyn.d_un.d_val = hdr->sh_offset;
5269 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5273 /* Set the bottom bit of DT_INIT/FINI if the
5274 corresponding function is Thumb. */
5276 name = info->init_function;
5279 name = info->fini_function;
5281 /* If it wasn't set by elf_bfd_final_link
5282 then there is nothing to adjust. */
5283 if (dyn.d_un.d_val != 0)
5285 struct elf_link_hash_entry * eh;
5287 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5288 FALSE, FALSE, TRUE);
5289 if (eh != (struct elf_link_hash_entry *) NULL
5290 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5292 dyn.d_un.d_val |= 1;
5293 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5300 /* Fill in the first entry in the procedure linkage table. */
5301 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5303 bfd_vma got_displacement;
5305 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5306 got_displacement = (sgot->output_section->vma
5307 + sgot->output_offset
5308 - splt->output_section->vma
5309 - splt->output_offset
5312 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5313 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5314 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5315 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5316 #ifdef FOUR_WORD_PLT
5317 /* The displacement value goes in the otherwise-unused last word of
5318 the second entry. */
5319 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5321 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5325 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5326 really seem like the right value. */
5327 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5330 /* Fill in the first three entries in the global offset table. */
5336 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5338 bfd_put_32 (output_bfd,
5339 sdyn->output_section->vma + sdyn->output_offset,
5341 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5342 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5345 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5352 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5354 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5355 struct elf32_arm_link_hash_table *globals;
5357 i_ehdrp = elf_elfheader (abfd);
5359 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
5360 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
5362 i_ehdrp->e_ident[EI_OSABI] = 0;
5363 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
5367 globals = elf32_arm_hash_table (link_info);
5368 if (globals->byteswap_code)
5369 i_ehdrp->e_flags |= EF_ARM_BE8;
5373 static enum elf_reloc_type_class
5374 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
5376 switch ((int) ELF32_R_TYPE (rela->r_info))
5378 case R_ARM_RELATIVE:
5379 return reloc_class_relative;
5380 case R_ARM_JUMP_SLOT:
5381 return reloc_class_plt;
5383 return reloc_class_copy;
5385 return reloc_class_normal;
5389 /* Set the right machine number for an Arm ELF file. */
5392 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
5394 if (hdr->sh_type == SHT_NOTE)
5395 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5401 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
5403 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
5406 /* Return TRUE if this is an unwinding table entry. */
5409 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
5413 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
5414 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
5415 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
5416 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
5420 /* Set the type and flags for an ARM section. We do this by
5421 the section name, which is a hack, but ought to work. */
5424 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
5428 name = bfd_get_section_name (abfd, sec);
5430 if (is_arm_elf_unwind_section_name (abfd, name))
5432 hdr->sh_type = SHT_ARM_EXIDX;
5433 hdr->sh_flags |= SHF_LINK_ORDER;
5438 /* Handle an ARM specific section when reading an object file.
5439 This is called when elf.c finds a section with an unknown type. */
5442 elf32_arm_section_from_shdr (bfd *abfd,
5443 Elf_Internal_Shdr * hdr,
5446 /* There ought to be a place to keep ELF backend specific flags, but
5447 at the moment there isn't one. We just keep track of the
5448 sections by their name, instead. Fortunately, the ABI gives
5449 names for all the ARM specific sections, so we will probably get
5451 switch (hdr->sh_type)
5460 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
5466 /* Called for each symbol. Builds a section map based on mapping symbols.
5467 Does not alter any of the symbols. */
5470 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
5472 Elf_Internal_Sym *elfsym,
5473 asection *input_sec,
5474 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
5477 elf32_arm_section_map *map;
5478 struct elf32_arm_link_hash_table *globals;
5480 /* Only do this on final link. */
5481 if (info->relocatable)
5484 /* Only build a map if we need to byteswap code. */
5485 globals = elf32_arm_hash_table (info);
5486 if (!globals->byteswap_code)
5489 /* We only want mapping symbols. */
5490 if (! is_arm_mapping_symbol_name (name))
5493 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
5494 map = elf32_arm_section_data (input_sec)->map;
5495 /* TODO: This may be inefficient, but we probably don't usually have many
5496 mapping symbols per section. */
5497 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
5498 elf32_arm_section_data (input_sec)->map = map;
5500 map[mapcount - 1].vma = elfsym->st_value;
5501 map[mapcount - 1].type = name[1];
5506 /* Allocate target specific section data. */
5509 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
5511 struct _arm_elf_section_data *sdata;
5512 bfd_size_type amt = sizeof (*sdata);
5514 sdata = bfd_zalloc (abfd, amt);
5517 sec->used_by_bfd = sdata;
5519 return _bfd_elf_new_section_hook (abfd, sec);
5523 /* Used to order a list of mapping symbols by address. */
5526 elf32_arm_compare_mapping (const void * a, const void * b)
5528 return ((const elf32_arm_section_map *) a)->vma
5529 > ((const elf32_arm_section_map *) b)->vma;
5533 /* Do code byteswapping. Return FALSE afterwards so that the section is
5534 written out as normal. */
5537 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
5541 elf32_arm_section_map *map;
5548 mapcount = elf32_arm_section_data (sec)->mapcount;
5549 map = elf32_arm_section_data (sec)->map;
5554 qsort (map, mapcount, sizeof (elf32_arm_section_map),
5555 elf32_arm_compare_mapping);
5557 offset = sec->output_section->vma + sec->output_offset;
5558 ptr = map[0].vma - offset;
5559 for (i = 0; i < mapcount; i++)
5561 if (i == mapcount - 1)
5564 end = map[i + 1].vma - offset;
5566 switch (map[i].type)
5569 /* Byte swap code words. */
5570 while (ptr + 3 < end)
5572 tmp = contents[ptr];
5573 contents[ptr] = contents[ptr + 3];
5574 contents[ptr + 3] = tmp;
5575 tmp = contents[ptr + 1];
5576 contents[ptr + 1] = contents[ptr + 2];
5577 contents[ptr + 2] = tmp;
5583 /* Byte swap code halfwords. */
5584 while (ptr + 1 < end)
5586 tmp = contents[ptr];
5587 contents[ptr] = contents[ptr + 1];
5588 contents[ptr + 1] = tmp;
5594 /* Leave data alone. */
5603 /* Display STT_ARM_TFUNC symbols as functions. */
5606 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5609 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5611 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
5612 elfsym->symbol.flags |= BSF_FUNCTION;
5616 /* Mangle thumb function symbols as we read them in. */
5619 elf32_arm_swap_symbol_in (bfd * abfd,
5622 Elf_Internal_Sym *dst)
5624 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
5626 /* New EABI objects mark thumb function symbols by setting the low bit of
5627 the address. Turn these into STT_ARM_TFUNC. */
5628 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
5629 && (dst->st_value & 1))
5631 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
5632 dst->st_value &= ~(bfd_vma) 1;
5637 /* Mangle thumb function symbols as we write them out. */
5640 elf32_arm_swap_symbol_out (bfd *abfd,
5641 const Elf_Internal_Sym *src,
5645 Elf_Internal_Sym newsym;
5647 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
5648 of the address set, as per the new EABI. We do this unconditionally
5649 because objcopy does not set the elf header flags until after
5650 it writes out the symbol table. */
5651 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
5654 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
5655 newsym.st_value |= 1;
5659 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
5662 /* We use this to override swap_symbol_in and swap_symbol_out. */
5663 const struct elf_size_info elf32_arm_size_info = {
5664 sizeof (Elf32_External_Ehdr),
5665 sizeof (Elf32_External_Phdr),
5666 sizeof (Elf32_External_Shdr),
5667 sizeof (Elf32_External_Rel),
5668 sizeof (Elf32_External_Rela),
5669 sizeof (Elf32_External_Sym),
5670 sizeof (Elf32_External_Dyn),
5671 sizeof (Elf_External_Note),
5675 ELFCLASS32, EV_CURRENT,
5676 bfd_elf32_write_out_phdrs,
5677 bfd_elf32_write_shdrs_and_ehdr,
5678 bfd_elf32_write_relocs,
5679 elf32_arm_swap_symbol_in,
5680 elf32_arm_swap_symbol_out,
5681 bfd_elf32_slurp_reloc_table,
5682 bfd_elf32_slurp_symbol_table,
5683 bfd_elf32_swap_dyn_in,
5684 bfd_elf32_swap_dyn_out,
5685 bfd_elf32_swap_reloc_in,
5686 bfd_elf32_swap_reloc_out,
5687 bfd_elf32_swap_reloca_in,
5688 bfd_elf32_swap_reloca_out
5691 #define ELF_ARCH bfd_arch_arm
5692 #define ELF_MACHINE_CODE EM_ARM
5693 #ifdef __QNXTARGET__
5694 #define ELF_MAXPAGESIZE 0x1000
5696 #define ELF_MAXPAGESIZE 0x8000
5699 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5700 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
5701 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5702 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5703 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
5704 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
5705 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
5706 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
5707 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
5709 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5710 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5711 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5712 #define elf_backend_check_relocs elf32_arm_check_relocs
5713 #define elf_backend_relocate_section elf32_arm_relocate_section
5714 #define elf_backend_write_section elf32_arm_write_section
5715 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5716 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
5717 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5718 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
5719 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
5720 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
5721 #define elf_backend_post_process_headers elf32_arm_post_process_headers
5722 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
5723 #define elf_backend_object_p elf32_arm_object_p
5724 #define elf_backend_section_flags elf32_arm_section_flags
5725 #define elf_backend_fake_sections elf32_arm_fake_sections
5726 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
5727 #define elf_backend_final_write_processing elf32_arm_final_write_processing
5728 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
5729 #define elf_backend_symbol_processing elf32_arm_symbol_processing
5730 #define elf_backend_size_info elf32_arm_size_info
5732 #define elf_backend_can_refcount 1
5733 #define elf_backend_can_gc_sections 1
5734 #define elf_backend_plt_readonly 1
5735 #define elf_backend_want_got_plt 1
5736 #define elf_backend_want_plt_sym 0
5737 #define elf_backend_may_use_rel_p 1
5738 #define elf_backend_may_use_rela_p 0
5739 #define elf_backend_default_use_rela_p 0
5740 #define elf_backend_rela_normal 0
5742 #define elf_backend_got_header_size 12
5744 #include "elf32-target.h"
5746 /* VxWorks Targets */
5748 #undef TARGET_LITTLE_SYM
5749 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
5750 #undef TARGET_LITTLE_NAME
5751 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
5752 #undef TARGET_BIG_SYM
5753 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
5754 #undef TARGET_BIG_NAME
5755 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
5757 /* Like elf32_arm_link_hash_table_create -- but overrides
5758 appropriately for VxWorks. */
5759 static struct bfd_link_hash_table *
5760 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
5762 struct bfd_link_hash_table *ret;
5764 ret = elf32_arm_link_hash_table_create (abfd);
5767 struct elf32_arm_link_hash_table *htab
5768 = (struct elf32_arm_link_hash_table *)ret;
5775 #define elf32_bed elf32_arm_vxworks_bed
5777 #undef bfd_elf32_bfd_link_hash_table_create
5778 #define bfd_elf32_bfd_link_hash_table_create \
5779 elf32_arm_vxworks_link_hash_table_create
5781 #undef elf_backend_may_use_rel_p
5782 #define elf_backend_may_use_rel_p 0
5783 #undef elf_backend_may_use_rela_p
5784 #define elf_backend_may_use_rela_p 1
5785 #undef elf_backend_default_use_rela_p
5786 #define elf_backend_default_use_rela_p 1
5787 #undef elf_backend_rela_normal
5788 #define elf_backend_rela_normal 1
5790 #include "elf32-target.h"
5793 /* Symbian OS Targets */
5795 #undef TARGET_LITTLE_SYM
5796 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5797 #undef TARGET_LITTLE_NAME
5798 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5799 #undef TARGET_BIG_SYM
5800 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5801 #undef TARGET_BIG_NAME
5802 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
5804 /* Like elf32_arm_link_hash_table_create -- but overrides
5805 appropriately for Symbian OS. */
5806 static struct bfd_link_hash_table *
5807 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
5809 struct bfd_link_hash_table *ret;
5811 ret = elf32_arm_link_hash_table_create (abfd);
5814 struct elf32_arm_link_hash_table *htab
5815 = (struct elf32_arm_link_hash_table *)ret;
5816 /* There is no PLT header for Symbian OS. */
5817 htab->plt_header_size = 0;
5818 /* The PLT entries are each three instructions. */
5819 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
5820 htab->symbian_p = 1;
5825 /* In a BPABI executable, the dynamic linking sections do not go in
5826 the loadable read-only segment. The post-linker may wish to refer
5827 to these sections, but they are not part of the final program
5829 static struct bfd_elf_special_section const
5830 elf32_arm_symbian_special_sections[]=
5832 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
5833 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
5834 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
5835 { ".got", 4, 0, SHT_PROGBITS, 0 },
5836 { ".hash", 5, 0, SHT_HASH, 0 },
5837 { NULL, 0, 0, 0, 0 }
5841 elf32_arm_symbian_begin_write_processing (bfd *abfd,
5842 struct bfd_link_info *link_info
5845 /* BPABI objects are never loaded directly by an OS kernel; they are
5846 processed by a postlinker first, into an OS-specific format. If
5847 the D_PAGED bit is set on the file, BFD will align segments on
5848 page boundaries, so that an OS can directly map the file. With
5849 BPABI objects, that just results in wasted space. In addition,
5850 because we clear the D_PAGED bit, map_sections_to_segments will
5851 recognize that the program headers should not be mapped into any
5852 loadable segment. */
5853 abfd->flags &= ~D_PAGED;
5857 elf32_arm_symbian_modify_segment_map (bfd *abfd,
5858 struct bfd_link_info *info
5861 struct elf_segment_map *m;
5864 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5865 segment. However, because the .dynamic section is not marked
5866 with SEC_LOAD, the generic ELF code will not create such a
5868 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
5871 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
5872 m->next = elf_tdata (abfd)->segment_map;
5873 elf_tdata (abfd)->segment_map = m;
5880 #define elf32_bed elf32_arm_symbian_bed
5882 /* The dynamic sections are not allocated on SymbianOS; the postlinker
5883 will process them and then discard them. */
5884 #undef ELF_DYNAMIC_SEC_FLAGS
5885 #define ELF_DYNAMIC_SEC_FLAGS \
5886 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
5888 #undef bfd_elf32_bfd_link_hash_table_create
5889 #define bfd_elf32_bfd_link_hash_table_create \
5890 elf32_arm_symbian_link_hash_table_create
5892 #undef elf_backend_special_sections
5893 #define elf_backend_special_sections elf32_arm_symbian_special_sections
5895 #undef elf_backend_begin_write_processing
5896 #define elf_backend_begin_write_processing \
5897 elf32_arm_symbian_begin_write_processing
5899 #undef elf_backend_modify_segment_map
5900 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
5902 /* There is no .got section for BPABI objects, and hence no header. */
5903 #undef elf_backend_got_header_size
5904 #define elf_backend_got_header_size 0
5906 /* Similarly, there is no .got.plt section. */
5907 #undef elf_backend_want_got_plt
5908 #define elf_backend_want_got_plt 0
5910 #undef elf_backend_may_use_rel_p
5911 #define elf_backend_may_use_rel_p 1
5912 #undef elf_backend_may_use_rela_p
5913 #define elf_backend_may_use_rela_p 0
5914 #undef elf_backend_default_use_rela_p
5915 #define elf_backend_default_use_rela_p 1
5916 #undef elf_backend_rela_normal
5917 #define elf_backend_rela_normal 0
5919 #include "elf32-target.h"