1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
33 #define elf_info_to_howto 0
34 #define elf_info_to_howto_rel elf32_arm_info_to_howto
36 #define ARM_ELF_ABI_VERSION 0
37 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
39 static reloc_howto_type
* elf32_arm_reloc_type_lookup
40 PARAMS ((bfd
* abfd
, bfd_reloc_code_real_type code
));
41 static bfd_boolean elf32_arm_nabi_grok_prstatus
42 PARAMS ((bfd
*abfd
, Elf_Internal_Note
*note
));
43 static bfd_boolean elf32_arm_nabi_grok_psinfo
44 PARAMS ((bfd
*abfd
, Elf_Internal_Note
*note
));
46 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
47 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
50 static reloc_howto_type elf32_arm_howto_table
[] =
53 HOWTO (R_ARM_NONE
, /* type */
55 0, /* size (0 = byte, 1 = short, 2 = long) */
57 FALSE
, /* pc_relative */
59 complain_overflow_dont
,/* complain_on_overflow */
60 bfd_elf_generic_reloc
, /* special_function */
61 "R_ARM_NONE", /* name */
62 FALSE
, /* partial_inplace */
65 FALSE
), /* pcrel_offset */
67 HOWTO (R_ARM_PC24
, /* type */
69 2, /* size (0 = byte, 1 = short, 2 = long) */
71 TRUE
, /* pc_relative */
73 complain_overflow_signed
,/* complain_on_overflow */
74 bfd_elf_generic_reloc
, /* special_function */
75 "R_ARM_PC24", /* name */
76 FALSE
, /* partial_inplace */
77 0x00ffffff, /* src_mask */
78 0x00ffffff, /* dst_mask */
79 TRUE
), /* pcrel_offset */
82 HOWTO (R_ARM_ABS32
, /* type */
84 2, /* size (0 = byte, 1 = short, 2 = long) */
86 FALSE
, /* pc_relative */
88 complain_overflow_bitfield
,/* complain_on_overflow */
89 bfd_elf_generic_reloc
, /* special_function */
90 "R_ARM_ABS32", /* name */
91 FALSE
, /* partial_inplace */
92 0xffffffff, /* src_mask */
93 0xffffffff, /* dst_mask */
94 FALSE
), /* pcrel_offset */
96 /* standard 32bit pc-relative reloc */
97 HOWTO (R_ARM_REL32
, /* type */
99 2, /* size (0 = byte, 1 = short, 2 = long) */
101 TRUE
, /* pc_relative */
103 complain_overflow_bitfield
,/* complain_on_overflow */
104 bfd_elf_generic_reloc
, /* special_function */
105 "R_ARM_REL32", /* name */
106 FALSE
, /* partial_inplace */
107 0xffffffff, /* src_mask */
108 0xffffffff, /* dst_mask */
109 TRUE
), /* pcrel_offset */
112 HOWTO (R_ARM_PC13
, /* type */
114 0, /* size (0 = byte, 1 = short, 2 = long) */
116 FALSE
, /* pc_relative */
118 complain_overflow_bitfield
,/* complain_on_overflow */
119 bfd_elf_generic_reloc
, /* special_function */
120 "R_ARM_PC13", /* name */
121 FALSE
, /* partial_inplace */
122 0x000000ff, /* src_mask */
123 0x000000ff, /* dst_mask */
124 FALSE
), /* pcrel_offset */
126 /* 16 bit absolute */
127 HOWTO (R_ARM_ABS16
, /* type */
129 1, /* size (0 = byte, 1 = short, 2 = long) */
131 FALSE
, /* pc_relative */
133 complain_overflow_bitfield
,/* complain_on_overflow */
134 bfd_elf_generic_reloc
, /* special_function */
135 "R_ARM_ABS16", /* name */
136 FALSE
, /* partial_inplace */
137 0x0000ffff, /* src_mask */
138 0x0000ffff, /* dst_mask */
139 FALSE
), /* pcrel_offset */
141 /* 12 bit absolute */
142 HOWTO (R_ARM_ABS12
, /* type */
144 2, /* size (0 = byte, 1 = short, 2 = long) */
146 FALSE
, /* pc_relative */
148 complain_overflow_bitfield
,/* complain_on_overflow */
149 bfd_elf_generic_reloc
, /* special_function */
150 "R_ARM_ABS12", /* name */
151 FALSE
, /* partial_inplace */
152 0x000008ff, /* src_mask */
153 0x000008ff, /* dst_mask */
154 FALSE
), /* pcrel_offset */
156 HOWTO (R_ARM_THM_ABS5
, /* type */
158 1, /* size (0 = byte, 1 = short, 2 = long) */
160 FALSE
, /* pc_relative */
162 complain_overflow_bitfield
,/* complain_on_overflow */
163 bfd_elf_generic_reloc
, /* special_function */
164 "R_ARM_THM_ABS5", /* name */
165 FALSE
, /* partial_inplace */
166 0x000007e0, /* src_mask */
167 0x000007e0, /* dst_mask */
168 FALSE
), /* pcrel_offset */
171 HOWTO (R_ARM_ABS8
, /* type */
173 0, /* size (0 = byte, 1 = short, 2 = long) */
175 FALSE
, /* pc_relative */
177 complain_overflow_bitfield
,/* complain_on_overflow */
178 bfd_elf_generic_reloc
, /* special_function */
179 "R_ARM_ABS8", /* name */
180 FALSE
, /* partial_inplace */
181 0x000000ff, /* src_mask */
182 0x000000ff, /* dst_mask */
183 FALSE
), /* pcrel_offset */
185 HOWTO (R_ARM_SBREL32
, /* type */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
189 FALSE
, /* pc_relative */
191 complain_overflow_dont
,/* complain_on_overflow */
192 bfd_elf_generic_reloc
, /* special_function */
193 "R_ARM_SBREL32", /* name */
194 FALSE
, /* partial_inplace */
195 0xffffffff, /* src_mask */
196 0xffffffff, /* dst_mask */
197 FALSE
), /* pcrel_offset */
199 HOWTO (R_ARM_THM_PC22
, /* type */
201 2, /* size (0 = byte, 1 = short, 2 = long) */
203 TRUE
, /* pc_relative */
205 complain_overflow_signed
,/* complain_on_overflow */
206 bfd_elf_generic_reloc
, /* special_function */
207 "R_ARM_THM_PC22", /* name */
208 FALSE
, /* partial_inplace */
209 0x07ff07ff, /* src_mask */
210 0x07ff07ff, /* dst_mask */
211 TRUE
), /* pcrel_offset */
213 HOWTO (R_ARM_THM_PC8
, /* type */
215 1, /* size (0 = byte, 1 = short, 2 = long) */
217 TRUE
, /* pc_relative */
219 complain_overflow_signed
,/* complain_on_overflow */
220 bfd_elf_generic_reloc
, /* special_function */
221 "R_ARM_THM_PC8", /* name */
222 FALSE
, /* partial_inplace */
223 0x000000ff, /* src_mask */
224 0x000000ff, /* dst_mask */
225 TRUE
), /* pcrel_offset */
227 HOWTO (R_ARM_AMP_VCALL9
, /* type */
229 1, /* size (0 = byte, 1 = short, 2 = long) */
231 TRUE
, /* pc_relative */
233 complain_overflow_signed
,/* complain_on_overflow */
234 bfd_elf_generic_reloc
, /* special_function */
235 "R_ARM_AMP_VCALL9", /* name */
236 FALSE
, /* partial_inplace */
237 0x000000ff, /* src_mask */
238 0x000000ff, /* dst_mask */
239 TRUE
), /* pcrel_offset */
241 HOWTO (R_ARM_SWI24
, /* type */
243 0, /* size (0 = byte, 1 = short, 2 = long) */
245 FALSE
, /* pc_relative */
247 complain_overflow_signed
,/* complain_on_overflow */
248 bfd_elf_generic_reloc
, /* special_function */
249 "R_ARM_SWI24", /* name */
250 FALSE
, /* partial_inplace */
251 0x00000000, /* src_mask */
252 0x00000000, /* dst_mask */
253 FALSE
), /* pcrel_offset */
255 HOWTO (R_ARM_THM_SWI8
, /* type */
257 0, /* size (0 = byte, 1 = short, 2 = long) */
259 FALSE
, /* pc_relative */
261 complain_overflow_signed
,/* complain_on_overflow */
262 bfd_elf_generic_reloc
, /* special_function */
263 "R_ARM_SWI8", /* name */
264 FALSE
, /* partial_inplace */
265 0x00000000, /* src_mask */
266 0x00000000, /* dst_mask */
267 FALSE
), /* pcrel_offset */
269 /* BLX instruction for the ARM. */
270 HOWTO (R_ARM_XPC25
, /* type */
272 2, /* size (0 = byte, 1 = short, 2 = long) */
274 TRUE
, /* pc_relative */
276 complain_overflow_signed
,/* complain_on_overflow */
277 bfd_elf_generic_reloc
, /* special_function */
278 "R_ARM_XPC25", /* name */
279 FALSE
, /* partial_inplace */
280 0x00ffffff, /* src_mask */
281 0x00ffffff, /* dst_mask */
282 TRUE
), /* pcrel_offset */
284 /* BLX instruction for the Thumb. */
285 HOWTO (R_ARM_THM_XPC22
, /* type */
287 2, /* size (0 = byte, 1 = short, 2 = long) */
289 TRUE
, /* pc_relative */
291 complain_overflow_signed
,/* complain_on_overflow */
292 bfd_elf_generic_reloc
, /* special_function */
293 "R_ARM_THM_XPC22", /* name */
294 FALSE
, /* partial_inplace */
295 0x07ff07ff, /* src_mask */
296 0x07ff07ff, /* dst_mask */
297 TRUE
), /* pcrel_offset */
299 /* These next three relocs are not defined, but we need to fill the space. */
301 HOWTO (R_ARM_NONE
, /* type */
303 0, /* size (0 = byte, 1 = short, 2 = long) */
305 FALSE
, /* pc_relative */
307 complain_overflow_dont
,/* complain_on_overflow */
308 bfd_elf_generic_reloc
, /* special_function */
309 "R_ARM_unknown_17", /* name */
310 FALSE
, /* partial_inplace */
313 FALSE
), /* pcrel_offset */
315 HOWTO (R_ARM_NONE
, /* type */
317 0, /* size (0 = byte, 1 = short, 2 = long) */
319 FALSE
, /* pc_relative */
321 complain_overflow_dont
,/* complain_on_overflow */
322 bfd_elf_generic_reloc
, /* special_function */
323 "R_ARM_unknown_18", /* name */
324 FALSE
, /* partial_inplace */
327 FALSE
), /* pcrel_offset */
329 HOWTO (R_ARM_NONE
, /* type */
331 0, /* size (0 = byte, 1 = short, 2 = long) */
333 FALSE
, /* pc_relative */
335 complain_overflow_dont
,/* complain_on_overflow */
336 bfd_elf_generic_reloc
, /* special_function */
337 "R_ARM_unknown_19", /* name */
338 FALSE
, /* partial_inplace */
341 FALSE
), /* pcrel_offset */
343 /* Relocs used in ARM Linux */
345 HOWTO (R_ARM_COPY
, /* type */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
349 FALSE
, /* pc_relative */
351 complain_overflow_bitfield
,/* complain_on_overflow */
352 bfd_elf_generic_reloc
, /* special_function */
353 "R_ARM_COPY", /* name */
354 TRUE
, /* partial_inplace */
355 0xffffffff, /* src_mask */
356 0xffffffff, /* dst_mask */
357 FALSE
), /* pcrel_offset */
359 HOWTO (R_ARM_GLOB_DAT
, /* type */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
363 FALSE
, /* pc_relative */
365 complain_overflow_bitfield
,/* complain_on_overflow */
366 bfd_elf_generic_reloc
, /* special_function */
367 "R_ARM_GLOB_DAT", /* name */
368 TRUE
, /* partial_inplace */
369 0xffffffff, /* src_mask */
370 0xffffffff, /* dst_mask */
371 FALSE
), /* pcrel_offset */
373 HOWTO (R_ARM_JUMP_SLOT
, /* type */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
377 FALSE
, /* pc_relative */
379 complain_overflow_bitfield
,/* complain_on_overflow */
380 bfd_elf_generic_reloc
, /* special_function */
381 "R_ARM_JUMP_SLOT", /* name */
382 TRUE
, /* partial_inplace */
383 0xffffffff, /* src_mask */
384 0xffffffff, /* dst_mask */
385 FALSE
), /* pcrel_offset */
387 HOWTO (R_ARM_RELATIVE
, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 FALSE
, /* pc_relative */
393 complain_overflow_bitfield
,/* complain_on_overflow */
394 bfd_elf_generic_reloc
, /* special_function */
395 "R_ARM_RELATIVE", /* name */
396 TRUE
, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
399 FALSE
), /* pcrel_offset */
401 HOWTO (R_ARM_GOTOFF
, /* type */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
405 FALSE
, /* pc_relative */
407 complain_overflow_bitfield
,/* complain_on_overflow */
408 bfd_elf_generic_reloc
, /* special_function */
409 "R_ARM_GOTOFF", /* name */
410 TRUE
, /* partial_inplace */
411 0xffffffff, /* src_mask */
412 0xffffffff, /* dst_mask */
413 FALSE
), /* pcrel_offset */
415 HOWTO (R_ARM_GOTPC
, /* type */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
419 TRUE
, /* pc_relative */
421 complain_overflow_bitfield
,/* complain_on_overflow */
422 bfd_elf_generic_reloc
, /* special_function */
423 "R_ARM_GOTPC", /* name */
424 TRUE
, /* partial_inplace */
425 0xffffffff, /* src_mask */
426 0xffffffff, /* dst_mask */
427 TRUE
), /* pcrel_offset */
429 HOWTO (R_ARM_GOT32
, /* type */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
433 FALSE
, /* pc_relative */
435 complain_overflow_bitfield
,/* complain_on_overflow */
436 bfd_elf_generic_reloc
, /* special_function */
437 "R_ARM_GOT32", /* name */
438 TRUE
, /* partial_inplace */
439 0xffffffff, /* src_mask */
440 0xffffffff, /* dst_mask */
441 FALSE
), /* pcrel_offset */
443 HOWTO (R_ARM_PLT32
, /* type */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
447 TRUE
, /* pc_relative */
449 complain_overflow_bitfield
,/* complain_on_overflow */
450 bfd_elf_generic_reloc
, /* special_function */
451 "R_ARM_PLT32", /* name */
452 TRUE
, /* partial_inplace */
453 0x00ffffff, /* src_mask */
454 0x00ffffff, /* dst_mask */
455 TRUE
), /* pcrel_offset */
457 HOWTO (R_ARM_CALL
, /* type */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
461 TRUE
, /* pc_relative */
463 complain_overflow_signed
,/* complain_on_overflow */
464 bfd_elf_generic_reloc
, /* special_function */
465 "R_ARM_CALL", /* name */
466 FALSE
, /* partial_inplace */
467 0x00ffffff, /* src_mask */
468 0x00ffffff, /* dst_mask */
469 TRUE
), /* pcrel_offset */
471 HOWTO (R_ARM_JUMP24
, /* type */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
475 TRUE
, /* pc_relative */
477 complain_overflow_signed
,/* complain_on_overflow */
478 bfd_elf_generic_reloc
, /* special_function */
479 "R_ARM_JUMP24", /* name */
480 FALSE
, /* partial_inplace */
481 0x00ffffff, /* src_mask */
482 0x00ffffff, /* dst_mask */
483 TRUE
), /* pcrel_offset */
485 HOWTO (R_ARM_NONE
, /* type */
487 0, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE
, /* pc_relative */
491 complain_overflow_dont
,/* complain_on_overflow */
492 bfd_elf_generic_reloc
, /* special_function */
493 "R_ARM_unknown_30", /* name */
494 FALSE
, /* partial_inplace */
497 FALSE
), /* pcrel_offset */
499 HOWTO (R_ARM_NONE
, /* type */
501 0, /* size (0 = byte, 1 = short, 2 = long) */
503 FALSE
, /* pc_relative */
505 complain_overflow_dont
,/* complain_on_overflow */
506 bfd_elf_generic_reloc
, /* special_function */
507 "R_ARM_unknown_31", /* name */
508 FALSE
, /* partial_inplace */
511 FALSE
), /* pcrel_offset */
513 HOWTO (R_ARM_ALU_PCREL7_0
, /* type */
515 2, /* size (0 = byte, 1 = short, 2 = long) */
517 TRUE
, /* pc_relative */
519 complain_overflow_dont
,/* complain_on_overflow */
520 bfd_elf_generic_reloc
, /* special_function */
521 "R_ARM_ALU_PCREL_7_0", /* name */
522 FALSE
, /* partial_inplace */
523 0x00000fff, /* src_mask */
524 0x00000fff, /* dst_mask */
525 TRUE
), /* pcrel_offset */
527 HOWTO (R_ARM_ALU_PCREL15_8
, /* type */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
531 TRUE
, /* pc_relative */
533 complain_overflow_dont
,/* complain_on_overflow */
534 bfd_elf_generic_reloc
, /* special_function */
535 "R_ARM_ALU_PCREL_15_8",/* name */
536 FALSE
, /* partial_inplace */
537 0x00000fff, /* src_mask */
538 0x00000fff, /* dst_mask */
539 TRUE
), /* pcrel_offset */
541 HOWTO (R_ARM_ALU_PCREL23_15
, /* type */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
545 TRUE
, /* pc_relative */
547 complain_overflow_dont
,/* complain_on_overflow */
548 bfd_elf_generic_reloc
, /* special_function */
549 "R_ARM_ALU_PCREL_23_15",/* name */
550 FALSE
, /* partial_inplace */
551 0x00000fff, /* src_mask */
552 0x00000fff, /* dst_mask */
553 TRUE
), /* pcrel_offset */
555 HOWTO (R_ARM_LDR_SBREL_11_0
, /* type */
557 2, /* size (0 = byte, 1 = short, 2 = long) */
559 FALSE
, /* pc_relative */
561 complain_overflow_dont
,/* complain_on_overflow */
562 bfd_elf_generic_reloc
, /* special_function */
563 "R_ARM_LDR_SBREL_11_0",/* name */
564 FALSE
, /* partial_inplace */
565 0x00000fff, /* src_mask */
566 0x00000fff, /* dst_mask */
567 FALSE
), /* pcrel_offset */
569 HOWTO (R_ARM_ALU_SBREL_19_12
, /* type */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
573 FALSE
, /* pc_relative */
575 complain_overflow_dont
,/* complain_on_overflow */
576 bfd_elf_generic_reloc
, /* special_function */
577 "R_ARM_ALU_SBREL_19_12",/* name */
578 FALSE
, /* partial_inplace */
579 0x000ff000, /* src_mask */
580 0x000ff000, /* dst_mask */
581 FALSE
), /* pcrel_offset */
583 HOWTO (R_ARM_ALU_SBREL_27_20
, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE
, /* pc_relative */
589 complain_overflow_dont
,/* complain_on_overflow */
590 bfd_elf_generic_reloc
, /* special_function */
591 "R_ARM_ALU_SBREL_27_20",/* name */
592 FALSE
, /* partial_inplace */
593 0x0ff00000, /* src_mask */
594 0x0ff00000, /* dst_mask */
595 FALSE
), /* pcrel_offset */
597 HOWTO (R_ARM_TARGET1
, /* type */
599 2, /* size (0 = byte, 1 = short, 2 = long) */
601 FALSE
, /* pc_relative */
603 complain_overflow_dont
,/* complain_on_overflow */
604 bfd_elf_generic_reloc
, /* special_function */
605 "R_ARM_TARGET1", /* name */
606 FALSE
, /* partial_inplace */
607 0xffffffff, /* src_mask */
608 0xffffffff, /* dst_mask */
609 FALSE
), /* pcrel_offset */
611 HOWTO (R_ARM_ROSEGREL32
, /* type */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
615 FALSE
, /* pc_relative */
617 complain_overflow_dont
,/* complain_on_overflow */
618 bfd_elf_generic_reloc
, /* special_function */
619 "R_ARM_ROSEGREL32", /* name */
620 FALSE
, /* partial_inplace */
621 0xffffffff, /* src_mask */
622 0xffffffff, /* dst_mask */
623 FALSE
), /* pcrel_offset */
625 HOWTO (R_ARM_V4BX
, /* type */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
629 FALSE
, /* pc_relative */
631 complain_overflow_dont
,/* complain_on_overflow */
632 bfd_elf_generic_reloc
, /* special_function */
633 "R_ARM_V4BX", /* name */
634 FALSE
, /* partial_inplace */
635 0xffffffff, /* src_mask */
636 0xffffffff, /* dst_mask */
637 FALSE
), /* pcrel_offset */
639 HOWTO (R_ARM_TARGET2
, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE
, /* pc_relative */
645 complain_overflow_signed
,/* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 "R_ARM_TARGET2", /* name */
648 FALSE
, /* partial_inplace */
649 0xffffffff, /* src_mask */
650 0xffffffff, /* dst_mask */
651 TRUE
), /* pcrel_offset */
653 HOWTO (R_ARM_PREL31
, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 TRUE
, /* pc_relative */
659 complain_overflow_signed
,/* complain_on_overflow */
660 bfd_elf_generic_reloc
, /* special_function */
661 "R_ARM_PREL31", /* name */
662 FALSE
, /* partial_inplace */
663 0x7fffffff, /* src_mask */
664 0x7fffffff, /* dst_mask */
665 TRUE
), /* pcrel_offset */
668 /* GNU extension to record C++ vtable hierarchy */
669 static reloc_howto_type elf32_arm_vtinherit_howto
=
670 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
674 FALSE
, /* pc_relative */
676 complain_overflow_dont
, /* complain_on_overflow */
677 NULL
, /* special_function */
678 "R_ARM_GNU_VTINHERIT", /* name */
679 FALSE
, /* partial_inplace */
682 FALSE
); /* pcrel_offset */
684 /* GNU extension to record C++ vtable member usage */
685 static reloc_howto_type elf32_arm_vtentry_howto
=
686 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
688 2, /* size (0 = byte, 1 = short, 2 = long) */
690 FALSE
, /* pc_relative */
692 complain_overflow_dont
, /* complain_on_overflow */
693 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
694 "R_ARM_GNU_VTENTRY", /* name */
695 FALSE
, /* partial_inplace */
698 FALSE
); /* pcrel_offset */
700 /* 12 bit pc relative */
701 static reloc_howto_type elf32_arm_thm_pc11_howto
=
702 HOWTO (R_ARM_THM_PC11
, /* type */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
706 TRUE
, /* pc_relative */
708 complain_overflow_signed
, /* complain_on_overflow */
709 bfd_elf_generic_reloc
, /* special_function */
710 "R_ARM_THM_PC11", /* name */
711 FALSE
, /* partial_inplace */
712 0x000007ff, /* src_mask */
713 0x000007ff, /* dst_mask */
714 TRUE
); /* pcrel_offset */
716 /* 12 bit pc relative */
717 static reloc_howto_type elf32_arm_thm_pc9_howto
=
718 HOWTO (R_ARM_THM_PC9
, /* type */
720 1, /* size (0 = byte, 1 = short, 2 = long) */
722 TRUE
, /* pc_relative */
724 complain_overflow_signed
, /* complain_on_overflow */
725 bfd_elf_generic_reloc
, /* special_function */
726 "R_ARM_THM_PC9", /* name */
727 FALSE
, /* partial_inplace */
728 0x000000ff, /* src_mask */
729 0x000000ff, /* dst_mask */
730 TRUE
); /* pcrel_offset */
732 /* Place relative GOT-indirect. */
733 static reloc_howto_type elf32_arm_got_prel
=
734 HOWTO (R_ARM_GOT_PREL
, /* type */
736 2, /* size (0 = byte, 1 = short, 2 = long) */
738 TRUE
, /* pc_relative */
740 complain_overflow_dont
, /* complain_on_overflow */
741 bfd_elf_generic_reloc
, /* special_function */
742 "R_ARM_GOT_PREL", /* name */
743 FALSE
, /* partial_inplace */
744 0xffffffff, /* src_mask */
745 0xffffffff, /* dst_mask */
746 TRUE
); /* pcrel_offset */
748 /* Currently unused relocations. */
749 static reloc_howto_type elf32_arm_r_howto
[4] =
751 HOWTO (R_ARM_RREL32
, /* type */
753 0, /* size (0 = byte, 1 = short, 2 = long) */
755 FALSE
, /* pc_relative */
757 complain_overflow_dont
,/* complain_on_overflow */
758 bfd_elf_generic_reloc
, /* special_function */
759 "R_ARM_RREL32", /* name */
760 FALSE
, /* partial_inplace */
763 FALSE
), /* pcrel_offset */
765 HOWTO (R_ARM_RABS32
, /* type */
767 0, /* size (0 = byte, 1 = short, 2 = long) */
769 FALSE
, /* pc_relative */
771 complain_overflow_dont
,/* complain_on_overflow */
772 bfd_elf_generic_reloc
, /* special_function */
773 "R_ARM_RABS32", /* name */
774 FALSE
, /* partial_inplace */
777 FALSE
), /* pcrel_offset */
779 HOWTO (R_ARM_RPC24
, /* type */
781 0, /* size (0 = byte, 1 = short, 2 = long) */
783 FALSE
, /* pc_relative */
785 complain_overflow_dont
,/* complain_on_overflow */
786 bfd_elf_generic_reloc
, /* special_function */
787 "R_ARM_RPC24", /* name */
788 FALSE
, /* partial_inplace */
791 FALSE
), /* pcrel_offset */
793 HOWTO (R_ARM_RBASE
, /* type */
795 0, /* size (0 = byte, 1 = short, 2 = long) */
797 FALSE
, /* pc_relative */
799 complain_overflow_dont
,/* complain_on_overflow */
800 bfd_elf_generic_reloc
, /* special_function */
801 "R_ARM_RBASE", /* name */
802 FALSE
, /* partial_inplace */
805 FALSE
) /* pcrel_offset */
808 static reloc_howto_type
*
809 elf32_arm_howto_from_type (unsigned int r_type
)
811 if (r_type
< NUM_ELEM (elf32_arm_howto_table
))
812 return &elf32_arm_howto_table
[r_type
];
817 return &elf32_arm_got_prel
;
819 case R_ARM_GNU_VTINHERIT
:
820 return &elf32_arm_vtinherit_howto
;
822 case R_ARM_GNU_VTENTRY
:
823 return &elf32_arm_vtentry_howto
;
826 return &elf32_arm_thm_pc11_howto
;
829 return &elf32_arm_thm_pc9_howto
;
835 return &elf32_arm_r_howto
[r_type
- R_ARM_RREL32
];
843 elf32_arm_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
, arelent
* bfd_reloc
,
844 Elf_Internal_Rela
* elf_reloc
)
848 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
849 bfd_reloc
->howto
= elf32_arm_howto_from_type (r_type
);
852 struct elf32_arm_reloc_map
854 bfd_reloc_code_real_type bfd_reloc_val
;
855 unsigned char elf_reloc_val
;
858 /* All entries in this list must also be present in elf32_arm_howto_table. */
859 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
861 {BFD_RELOC_NONE
, R_ARM_NONE
},
862 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
863 {BFD_RELOC_ARM_PCREL_BLX
, R_ARM_XPC25
},
864 {BFD_RELOC_THUMB_PCREL_BLX
, R_ARM_THM_XPC22
},
865 {BFD_RELOC_32
, R_ARM_ABS32
},
866 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
867 {BFD_RELOC_8
, R_ARM_ABS8
},
868 {BFD_RELOC_16
, R_ARM_ABS16
},
869 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
870 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
871 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_PC22
},
872 {BFD_RELOC_ARM_COPY
, R_ARM_COPY
},
873 {BFD_RELOC_ARM_GLOB_DAT
, R_ARM_GLOB_DAT
},
874 {BFD_RELOC_ARM_JUMP_SLOT
, R_ARM_JUMP_SLOT
},
875 {BFD_RELOC_ARM_RELATIVE
, R_ARM_RELATIVE
},
876 {BFD_RELOC_ARM_GOTOFF
, R_ARM_GOTOFF
},
877 {BFD_RELOC_ARM_GOTPC
, R_ARM_GOTPC
},
878 {BFD_RELOC_ARM_GOT32
, R_ARM_GOT32
},
879 {BFD_RELOC_ARM_PLT32
, R_ARM_PLT32
},
880 {BFD_RELOC_ARM_TARGET1
, R_ARM_TARGET1
},
881 {BFD_RELOC_ARM_ROSEGREL32
, R_ARM_ROSEGREL32
},
882 {BFD_RELOC_ARM_SBREL32
, R_ARM_SBREL32
},
883 {BFD_RELOC_ARM_PREL31
, R_ARM_PREL31
},
884 {BFD_RELOC_ARM_TARGET2
, R_ARM_TARGET2
}
887 static reloc_howto_type
*
888 elf32_arm_reloc_type_lookup (abfd
, code
)
889 bfd
*abfd ATTRIBUTE_UNUSED
;
890 bfd_reloc_code_real_type code
;
896 case BFD_RELOC_VTABLE_INHERIT
:
897 return & elf32_arm_vtinherit_howto
;
899 case BFD_RELOC_VTABLE_ENTRY
:
900 return & elf32_arm_vtentry_howto
;
902 case BFD_RELOC_THUMB_PCREL_BRANCH12
:
903 return & elf32_arm_thm_pc11_howto
;
905 case BFD_RELOC_THUMB_PCREL_BRANCH9
:
906 return & elf32_arm_thm_pc9_howto
;
909 for (i
= 0; i
< NUM_ELEM (elf32_arm_reloc_map
); i
++)
910 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
911 return & elf32_arm_howto_table
[elf32_arm_reloc_map
[i
].elf_reloc_val
];
917 /* Support for core dump NOTE sections */
919 elf32_arm_nabi_grok_prstatus (abfd
, note
)
921 Elf_Internal_Note
*note
;
926 switch (note
->descsz
)
931 case 148: /* Linux/ARM 32-bit*/
933 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
936 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
945 /* Make a ".reg/999" section. */
946 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
947 size
, note
->descpos
+ offset
);
951 elf32_arm_nabi_grok_psinfo (abfd
, note
)
953 Elf_Internal_Note
*note
;
955 switch (note
->descsz
)
960 case 124: /* Linux/ARM elf_prpsinfo */
961 elf_tdata (abfd
)->core_program
962 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
963 elf_tdata (abfd
)->core_command
964 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
967 /* Note that for some reason, a spurious space is tacked
968 onto the end of the args in some (at least one anyway)
969 implementations, so strip it off if it exists. */
972 char *command
= elf_tdata (abfd
)->core_command
;
973 int n
= strlen (command
);
975 if (0 < n
&& command
[n
- 1] == ' ')
976 command
[n
- 1] = '\0';
982 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
983 #define TARGET_LITTLE_NAME "elf32-littlearm"
984 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
985 #define TARGET_BIG_NAME "elf32-bigarm"
987 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
988 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
994 typedef unsigned long int insn32
;
995 typedef unsigned short int insn16
;
997 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
998 #define INTERWORK_FLAG(abfd) \
999 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
1000 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1002 /* The linker script knows the section names for placement.
1003 The entry_names are used to do simple name mangling on the stubs.
1004 Given a function name, and its type, the stub can be found. The
1005 name can be changed. The only requirement is the %s be present. */
1006 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1007 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1009 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1010 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1012 /* The name of the dynamic interpreter. This is put in the .interp
1014 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1016 #ifdef FOUR_WORD_PLT
1018 /* The first entry in a procedure linkage table looks like
1019 this. It is set up so that any shared library function that is
1020 called before the relocation has been set up calls the dynamic
1022 static const bfd_vma elf32_arm_plt0_entry
[] =
1024 0xe52de004, /* str lr, [sp, #-4]! */
1025 0xe59fe010, /* ldr lr, [pc, #16] */
1026 0xe08fe00e, /* add lr, pc, lr */
1027 0xe5bef008, /* ldr pc, [lr, #8]! */
1030 /* Subsequent entries in a procedure linkage table look like
1032 static const bfd_vma elf32_arm_plt_entry
[] =
1034 0xe28fc600, /* add ip, pc, #NN */
1035 0xe28cca00, /* add ip, ip, #NN */
1036 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1037 0x00000000, /* unused */
1042 /* The first entry in a procedure linkage table looks like
1043 this. It is set up so that any shared library function that is
1044 called before the relocation has been set up calls the dynamic
1046 static const bfd_vma elf32_arm_plt0_entry
[] =
1048 0xe52de004, /* str lr, [sp, #-4]! */
1049 0xe59fe004, /* ldr lr, [pc, #4] */
1050 0xe08fe00e, /* add lr, pc, lr */
1051 0xe5bef008, /* ldr pc, [lr, #8]! */
1052 0x00000000, /* &GOT[0] - . */
1055 /* Subsequent entries in a procedure linkage table look like
1057 static const bfd_vma elf32_arm_plt_entry
[] =
1059 0xe28fc600, /* add ip, pc, #0xNN00000 */
1060 0xe28cca00, /* add ip, ip, #0xNN000 */
1061 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1066 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1067 #define PLT_THUMB_STUB_SIZE 4
1068 static const bfd_vma elf32_arm_plt_thumb_stub
[] =
1074 /* The entries in a PLT when using a DLL-based target with multiple
1076 static const bfd_vma elf32_arm_symbian_plt_entry
[] =
1078 0xe51ff004, /* ldr pr, [pc, #-4] */
1079 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1082 /* Used to build a map of a section. This is required for mixed-endian
1085 typedef struct elf32_elf_section_map
1090 elf32_arm_section_map
;
1092 struct _arm_elf_section_data
1094 struct bfd_elf_section_data elf
;
1096 elf32_arm_section_map
*map
;
1099 #define elf32_arm_section_data(sec) \
1100 ((struct _arm_elf_section_data *) elf_section_data (sec))
1102 /* The ARM linker needs to keep track of the number of relocs that it
1103 decides to copy in check_relocs for each symbol. This is so that
1104 it can discard PC relative relocs if it doesn't need them when
1105 linking with -Bsymbolic. We store the information in a field
1106 extending the regular ELF linker hash table. */
1108 /* This structure keeps track of the number of PC relative relocs we
1109 have copied for a given symbol. */
1110 struct elf32_arm_relocs_copied
1113 struct elf32_arm_relocs_copied
* next
;
1114 /* A section in dynobj. */
1116 /* Number of relocs copied in this section. */
1117 bfd_size_type count
;
1120 /* Arm ELF linker hash entry. */
1121 struct elf32_arm_link_hash_entry
1123 struct elf_link_hash_entry root
;
1125 /* Number of PC relative relocs copied for this symbol. */
1126 struct elf32_arm_relocs_copied
* relocs_copied
;
1128 /* We reference count Thumb references to a PLT entry separately,
1129 so that we can emit the Thumb trampoline only if needed. */
1130 bfd_signed_vma plt_thumb_refcount
;
1132 /* Since PLT entries have variable size if the Thumb prologue is
1133 used, we need to record the index into .got.plt instead of
1134 recomputing it from the PLT offset. */
1135 bfd_signed_vma plt_got_offset
;
1138 /* Traverse an arm ELF linker hash table. */
1139 #define elf32_arm_link_hash_traverse(table, func, info) \
1140 (elf_link_hash_traverse \
1142 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1145 /* Get the ARM elf linker hash table from a link_info structure. */
1146 #define elf32_arm_hash_table(info) \
1147 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1149 /* ARM ELF linker hash table. */
1150 struct elf32_arm_link_hash_table
1152 /* The main hash table. */
1153 struct elf_link_hash_table root
;
1155 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1156 bfd_size_type thumb_glue_size
;
1158 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1159 bfd_size_type arm_glue_size
;
1161 /* An arbitrary input BFD chosen to hold the glue sections. */
1162 bfd
* bfd_of_glue_owner
;
1164 /* Nonzero to output a BE8 image. */
1167 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1168 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1171 /* The relocation to use for R_ARM_TARGET2 relocations. */
1174 /* The number of bytes in the initial entry in the PLT. */
1175 bfd_size_type plt_header_size
;
1177 /* The number of bytes in the subsequent PLT etries. */
1178 bfd_size_type plt_entry_size
;
1180 /* True if the target system is Symbian OS. */
1183 /* Short-cuts to get to dynamic linker sections. */
1192 /* Small local sym to section mapping cache. */
1193 struct sym_sec_cache sym_sec
;
1195 /* For convenience in allocate_dynrelocs. */
1199 /* Create an entry in an ARM ELF linker hash table. */
1201 static struct bfd_hash_entry
*
1202 elf32_arm_link_hash_newfunc (struct bfd_hash_entry
* entry
,
1203 struct bfd_hash_table
* table
,
1204 const char * string
)
1206 struct elf32_arm_link_hash_entry
* ret
=
1207 (struct elf32_arm_link_hash_entry
*) entry
;
1209 /* Allocate the structure if it has not already been allocated by a
1211 if (ret
== (struct elf32_arm_link_hash_entry
*) NULL
)
1212 ret
= bfd_hash_allocate (table
, sizeof (struct elf32_arm_link_hash_entry
));
1214 return (struct bfd_hash_entry
*) ret
;
1216 /* Call the allocation method of the superclass. */
1217 ret
= ((struct elf32_arm_link_hash_entry
*)
1218 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
1222 ret
->relocs_copied
= NULL
;
1223 ret
->plt_thumb_refcount
= 0;
1224 ret
->plt_got_offset
= -1;
1227 return (struct bfd_hash_entry
*) ret
;
1230 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1231 shortcuts to them in our hash table. */
1234 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
1236 struct elf32_arm_link_hash_table
*htab
;
1238 htab
= elf32_arm_hash_table (info
);
1239 /* BPABI objects never have a GOT, or associated sections. */
1240 if (htab
->symbian_p
)
1243 if (! _bfd_elf_create_got_section (dynobj
, info
))
1246 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
1247 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
1248 if (!htab
->sgot
|| !htab
->sgotplt
)
1251 htab
->srelgot
= bfd_make_section (dynobj
, ".rel.got");
1252 if (htab
->srelgot
== NULL
1253 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
,
1254 (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1255 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
1257 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
1262 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1263 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1267 elf32_arm_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1269 struct elf32_arm_link_hash_table
*htab
;
1271 htab
= elf32_arm_hash_table (info
);
1272 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
1275 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1278 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
1279 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
1280 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
1282 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
1287 || (!info
->shared
&& !htab
->srelbss
))
1293 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1296 elf32_arm_copy_indirect_symbol (const struct elf_backend_data
*bed
,
1297 struct elf_link_hash_entry
*dir
,
1298 struct elf_link_hash_entry
*ind
)
1300 struct elf32_arm_link_hash_entry
*edir
, *eind
;
1302 edir
= (struct elf32_arm_link_hash_entry
*) dir
;
1303 eind
= (struct elf32_arm_link_hash_entry
*) ind
;
1305 if (eind
->relocs_copied
!= NULL
)
1307 if (edir
->relocs_copied
!= NULL
)
1309 struct elf32_arm_relocs_copied
**pp
;
1310 struct elf32_arm_relocs_copied
*p
;
1312 if (ind
->root
.type
== bfd_link_hash_indirect
)
1315 /* Add reloc counts against the weak sym to the strong sym
1316 list. Merge any entries against the same section. */
1317 for (pp
= &eind
->relocs_copied
; (p
= *pp
) != NULL
; )
1319 struct elf32_arm_relocs_copied
*q
;
1321 for (q
= edir
->relocs_copied
; q
!= NULL
; q
= q
->next
)
1322 if (q
->section
== p
->section
)
1324 q
->count
+= p
->count
;
1331 *pp
= edir
->relocs_copied
;
1334 edir
->relocs_copied
= eind
->relocs_copied
;
1335 eind
->relocs_copied
= NULL
;
1338 /* If the direct symbol already has an associated PLT entry, the
1339 indirect symbol should not. If it doesn't, swap refcount information
1340 from the indirect symbol. */
1341 if (edir
->plt_thumb_refcount
== 0)
1343 edir
->plt_thumb_refcount
= eind
->plt_thumb_refcount
;
1344 eind
->plt_thumb_refcount
= 0;
1347 BFD_ASSERT (eind
->plt_thumb_refcount
== 0);
1349 _bfd_elf_link_hash_copy_indirect (bed
, dir
, ind
);
1352 /* Create an ARM elf linker hash table. */
1354 static struct bfd_link_hash_table
*
1355 elf32_arm_link_hash_table_create (bfd
*abfd
)
1357 struct elf32_arm_link_hash_table
*ret
;
1358 bfd_size_type amt
= sizeof (struct elf32_arm_link_hash_table
);
1360 ret
= bfd_malloc (amt
);
1364 if (!_bfd_elf_link_hash_table_init (& ret
->root
, abfd
,
1365 elf32_arm_link_hash_newfunc
))
1372 ret
->sgotplt
= NULL
;
1373 ret
->srelgot
= NULL
;
1375 ret
->srelplt
= NULL
;
1376 ret
->sdynbss
= NULL
;
1377 ret
->srelbss
= NULL
;
1378 ret
->thumb_glue_size
= 0;
1379 ret
->arm_glue_size
= 0;
1380 ret
->bfd_of_glue_owner
= NULL
;
1381 ret
->byteswap_code
= 0;
1382 ret
->target1_is_rel
= 0;
1383 ret
->target2_reloc
= R_ARM_NONE
;
1384 #ifdef FOUR_WORD_PLT
1385 ret
->plt_header_size
= 16;
1386 ret
->plt_entry_size
= 16;
1388 ret
->plt_header_size
= 20;
1389 ret
->plt_entry_size
= 12;
1392 ret
->sym_sec
.abfd
= NULL
;
1395 return &ret
->root
.root
;
1398 /* Locate the Thumb encoded calling stub for NAME. */
1400 static struct elf_link_hash_entry
*
1401 find_thumb_glue (struct bfd_link_info
*link_info
,
1406 struct elf_link_hash_entry
*hash
;
1407 struct elf32_arm_link_hash_table
*hash_table
;
1409 /* We need a pointer to the armelf specific hash table. */
1410 hash_table
= elf32_arm_hash_table (link_info
);
1412 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
)
1413 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
1415 BFD_ASSERT (tmp_name
);
1417 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
1419 hash
= elf_link_hash_lookup
1420 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
1423 /* xgettext:c-format */
1424 (*_bfd_error_handler
) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1425 input_bfd
, tmp_name
, name
);
1432 /* Locate the ARM encoded calling stub for NAME. */
1434 static struct elf_link_hash_entry
*
1435 find_arm_glue (struct bfd_link_info
*link_info
,
1440 struct elf_link_hash_entry
*myh
;
1441 struct elf32_arm_link_hash_table
*hash_table
;
1443 /* We need a pointer to the elfarm specific hash table. */
1444 hash_table
= elf32_arm_hash_table (link_info
);
1446 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
)
1447 + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
1449 BFD_ASSERT (tmp_name
);
1451 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
1453 myh
= elf_link_hash_lookup
1454 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
1457 /* xgettext:c-format */
1458 (*_bfd_error_handler
) (_("%B: unable to find ARM glue '%s' for `%s'"),
1459 input_bfd
, tmp_name
, name
);
1470 ldr r12, __func_addr
1473 .word func @ behave as if you saw a ARM_32 reloc. */
1475 #define ARM2THUMB_GLUE_SIZE 12
1476 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
1477 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
1478 static const insn32 a2t3_func_addr_insn
= 0x00000001;
1480 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1484 __func_from_thumb: __func_from_thumb:
1486 nop ldr r6, __func_addr
1488 __func_change_to_arm: bx r6
1490 __func_back_to_thumb:
1496 #define THUMB2ARM_GLUE_SIZE 8
1497 static const insn16 t2a1_bx_pc_insn
= 0x4778;
1498 static const insn16 t2a2_noop_insn
= 0x46c0;
1499 static const insn32 t2a3_b_insn
= 0xea000000;
1501 #ifndef ELFARM_NABI_C_INCLUDED
1503 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info
* info
)
1507 struct elf32_arm_link_hash_table
* globals
;
1509 globals
= elf32_arm_hash_table (info
);
1511 BFD_ASSERT (globals
!= NULL
);
1513 if (globals
->arm_glue_size
!= 0)
1515 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1517 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
1518 ARM2THUMB_GLUE_SECTION_NAME
);
1520 BFD_ASSERT (s
!= NULL
);
1522 foo
= bfd_alloc (globals
->bfd_of_glue_owner
, globals
->arm_glue_size
);
1524 s
->size
= globals
->arm_glue_size
;
1528 if (globals
->thumb_glue_size
!= 0)
1530 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1532 s
= bfd_get_section_by_name
1533 (globals
->bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
1535 BFD_ASSERT (s
!= NULL
);
1537 foo
= bfd_alloc (globals
->bfd_of_glue_owner
, globals
->thumb_glue_size
);
1539 s
->size
= globals
->thumb_glue_size
;
1547 record_arm_to_thumb_glue (struct bfd_link_info
* link_info
,
1548 struct elf_link_hash_entry
* h
)
1550 const char * name
= h
->root
.root
.string
;
1553 struct elf_link_hash_entry
* myh
;
1554 struct bfd_link_hash_entry
* bh
;
1555 struct elf32_arm_link_hash_table
* globals
;
1558 globals
= elf32_arm_hash_table (link_info
);
1560 BFD_ASSERT (globals
!= NULL
);
1561 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1563 s
= bfd_get_section_by_name
1564 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
1566 BFD_ASSERT (s
!= NULL
);
1568 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
) + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1);
1570 BFD_ASSERT (tmp_name
);
1572 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
1574 myh
= elf_link_hash_lookup
1575 (&(globals
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
1579 /* We've already seen this guy. */
1584 /* The only trick here is using hash_table->arm_glue_size as the value.
1585 Even though the section isn't allocated yet, this is where we will be
1588 val
= globals
->arm_glue_size
+ 1;
1589 _bfd_generic_link_add_one_symbol (link_info
, globals
->bfd_of_glue_owner
,
1590 tmp_name
, BSF_GLOBAL
, s
, val
,
1591 NULL
, TRUE
, FALSE
, &bh
);
1593 myh
= (struct elf_link_hash_entry
*) bh
;
1594 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
1595 myh
->forced_local
= 1;
1599 globals
->arm_glue_size
+= ARM2THUMB_GLUE_SIZE
;
1605 record_thumb_to_arm_glue (struct bfd_link_info
*link_info
,
1606 struct elf_link_hash_entry
*h
)
1608 const char *name
= h
->root
.root
.string
;
1611 struct elf_link_hash_entry
*myh
;
1612 struct bfd_link_hash_entry
*bh
;
1613 struct elf32_arm_link_hash_table
*hash_table
;
1616 hash_table
= elf32_arm_hash_table (link_info
);
1618 BFD_ASSERT (hash_table
!= NULL
);
1619 BFD_ASSERT (hash_table
->bfd_of_glue_owner
!= NULL
);
1621 s
= bfd_get_section_by_name
1622 (hash_table
->bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
1624 BFD_ASSERT (s
!= NULL
);
1626 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
)
1627 + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1);
1629 BFD_ASSERT (tmp_name
);
1631 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
1633 myh
= elf_link_hash_lookup
1634 (&(hash_table
)->root
, tmp_name
, FALSE
, FALSE
, TRUE
);
1638 /* We've already seen this guy. */
1644 val
= hash_table
->thumb_glue_size
+ 1;
1645 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
1646 tmp_name
, BSF_GLOBAL
, s
, val
,
1647 NULL
, TRUE
, FALSE
, &bh
);
1649 /* If we mark it 'Thumb', the disassembler will do a better job. */
1650 myh
= (struct elf_link_hash_entry
*) bh
;
1651 myh
->type
= ELF_ST_INFO (STB_LOCAL
, STT_ARM_TFUNC
);
1652 myh
->forced_local
= 1;
1656 #define CHANGE_TO_ARM "__%s_change_to_arm"
1657 #define BACK_FROM_ARM "__%s_back_from_arm"
1659 /* Allocate another symbol to mark where we switch to Arm mode. */
1660 tmp_name
= bfd_malloc ((bfd_size_type
) strlen (name
)
1661 + strlen (CHANGE_TO_ARM
) + 1);
1663 BFD_ASSERT (tmp_name
);
1665 sprintf (tmp_name
, CHANGE_TO_ARM
, name
);
1668 val
= hash_table
->thumb_glue_size
+ 4,
1669 _bfd_generic_link_add_one_symbol (link_info
, hash_table
->bfd_of_glue_owner
,
1670 tmp_name
, BSF_LOCAL
, s
, val
,
1671 NULL
, TRUE
, FALSE
, &bh
);
1675 hash_table
->thumb_glue_size
+= THUMB2ARM_GLUE_SIZE
;
1680 /* Add the glue sections to ABFD. This function is called from the
1681 linker scripts in ld/emultempl/{armelf}.em. */
1684 bfd_elf32_arm_add_glue_sections_to_bfd (bfd
*abfd
,
1685 struct bfd_link_info
*info
)
1690 /* If we are only performing a partial
1691 link do not bother adding the glue. */
1692 if (info
->relocatable
)
1695 sec
= bfd_get_section_by_name (abfd
, ARM2THUMB_GLUE_SECTION_NAME
);
1699 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1700 will prevent elf_link_input_bfd() from processing the contents
1702 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_CODE
| SEC_READONLY
;
1704 sec
= bfd_make_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
);
1707 || !bfd_set_section_flags (abfd
, sec
, flags
)
1708 || !bfd_set_section_alignment (abfd
, sec
, 2))
1711 /* Set the gc mark to prevent the section from being removed by garbage
1712 collection, despite the fact that no relocs refer to this section. */
1716 sec
= bfd_get_section_by_name (abfd
, THUMB2ARM_GLUE_SECTION_NAME
);
1720 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1721 | SEC_CODE
| SEC_READONLY
;
1723 sec
= bfd_make_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
);
1726 || !bfd_set_section_flags (abfd
, sec
, flags
)
1727 || !bfd_set_section_alignment (abfd
, sec
, 2))
1736 /* Select a BFD to be used to hold the sections used by the glue code.
1737 This function is called from the linker scripts in ld/emultempl/
1741 bfd_elf32_arm_get_bfd_for_interworking (bfd
*abfd
, struct bfd_link_info
*info
)
1743 struct elf32_arm_link_hash_table
*globals
;
1745 /* If we are only performing a partial link
1746 do not bother getting a bfd to hold the glue. */
1747 if (info
->relocatable
)
1750 /* Make sure we don't attach the glue sections to a dynamic object. */
1751 BFD_ASSERT (!(abfd
->flags
& DYNAMIC
));
1753 globals
= elf32_arm_hash_table (info
);
1755 BFD_ASSERT (globals
!= NULL
);
1757 if (globals
->bfd_of_glue_owner
!= NULL
)
1760 /* Save the bfd for later use. */
1761 globals
->bfd_of_glue_owner
= abfd
;
1767 bfd_elf32_arm_process_before_allocation (bfd
*abfd
,
1768 struct bfd_link_info
*link_info
,
1771 Elf_Internal_Shdr
*symtab_hdr
;
1772 Elf_Internal_Rela
*internal_relocs
= NULL
;
1773 Elf_Internal_Rela
*irel
, *irelend
;
1774 bfd_byte
*contents
= NULL
;
1777 struct elf32_arm_link_hash_table
*globals
;
1779 /* If we are only performing a partial link do not bother
1780 to construct any glue. */
1781 if (link_info
->relocatable
)
1784 /* Here we have a bfd that is to be included on the link. We have a hook
1785 to do reloc rummaging, before section sizes are nailed down. */
1786 globals
= elf32_arm_hash_table (link_info
);
1788 BFD_ASSERT (globals
!= NULL
);
1789 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1791 if (byteswap_code
&& !bfd_big_endian (abfd
))
1793 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1797 globals
->byteswap_code
= byteswap_code
;
1799 /* Rummage around all the relocs and map the glue vectors. */
1800 sec
= abfd
->sections
;
1805 for (; sec
!= NULL
; sec
= sec
->next
)
1807 if (sec
->reloc_count
== 0)
1810 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1812 /* Load the relocs. */
1814 = _bfd_elf_link_read_relocs (abfd
, sec
, (void *) NULL
,
1815 (Elf_Internal_Rela
*) NULL
, FALSE
);
1817 if (internal_relocs
== NULL
)
1820 irelend
= internal_relocs
+ sec
->reloc_count
;
1821 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
1824 unsigned long r_index
;
1826 struct elf_link_hash_entry
*h
;
1828 r_type
= ELF32_R_TYPE (irel
->r_info
);
1829 r_index
= ELF32_R_SYM (irel
->r_info
);
1831 /* These are the only relocation types we care about. */
1832 if ( r_type
!= R_ARM_PC24
1833 && r_type
!= R_ARM_PLT32
1835 && r_type
!= R_ARM_CALL
1836 && r_type
!= R_ARM_JUMP24
1838 && r_type
!= R_ARM_THM_PC22
)
1841 /* Get the section contents if we haven't done so already. */
1842 if (contents
== NULL
)
1844 /* Get cached copy if it exists. */
1845 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1846 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1849 /* Go get them off disk. */
1850 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1855 /* If the relocation is not against a symbol it cannot concern us. */
1858 /* We don't care about local symbols. */
1859 if (r_index
< symtab_hdr
->sh_info
)
1862 /* This is an external symbol. */
1863 r_index
-= symtab_hdr
->sh_info
;
1864 h
= (struct elf_link_hash_entry
*)
1865 elf_sym_hashes (abfd
)[r_index
];
1867 /* If the relocation is against a static symbol it must be within
1868 the current section and so cannot be a cross ARM/Thumb relocation. */
1872 /* If the call will go through a PLT entry then we do not need
1874 if (globals
->splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
1884 /* This one is a call from arm code. We need to look up
1885 the target of the call. If it is a thumb target, we
1887 if (ELF_ST_TYPE(h
->type
) == STT_ARM_TFUNC
)
1888 record_arm_to_thumb_glue (link_info
, h
);
1891 case R_ARM_THM_PC22
:
1892 /* This one is a call from thumb code. We look
1893 up the target of the call. If it is not a thumb
1894 target, we insert glue. */
1895 if (ELF_ST_TYPE (h
->type
) != STT_ARM_TFUNC
)
1896 record_thumb_to_arm_glue (link_info
, h
);
1904 if (contents
!= NULL
1905 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1909 if (internal_relocs
!= NULL
1910 && elf_section_data (sec
)->relocs
!= internal_relocs
)
1911 free (internal_relocs
);
1912 internal_relocs
= NULL
;
1918 if (contents
!= NULL
1919 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1921 if (internal_relocs
!= NULL
1922 && elf_section_data (sec
)->relocs
!= internal_relocs
)
1923 free (internal_relocs
);
1931 /* Set target relocation values needed during linking. */
1934 bfd_elf32_arm_set_target_relocs (struct bfd_link_info
*link_info
,
1936 char * target2_type
)
1938 struct elf32_arm_link_hash_table
*globals
;
1940 globals
= elf32_arm_hash_table (link_info
);
1942 globals
->target1_is_rel
= target1_is_rel
;
1943 if (strcmp (target2_type
, "rel") == 0)
1944 globals
->target2_reloc
= R_ARM_REL32
;
1945 else if (strcmp (target2_type
, "abs") == 0)
1946 globals
->target2_reloc
= R_ARM_ABS32
;
1947 else if (strcmp (target2_type
, "got-rel") == 0)
1948 globals
->target2_reloc
= R_ARM_GOT_PREL
;
1951 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
1957 /* The thumb form of a long branch is a bit finicky, because the offset
1958 encoding is split over two fields, each in it's own instruction. They
1959 can occur in any order. So given a thumb form of long branch, and an
1960 offset, insert the offset into the thumb branch and return finished
1963 It takes two thumb instructions to encode the target address. Each has
1964 11 bits to invest. The upper 11 bits are stored in one (identified by
1965 H-0.. see below), the lower 11 bits are stored in the other (identified
1968 Combine together and shifted left by 1 (it's a half word address) and
1972 H-0, upper address-0 = 000
1974 H-1, lower address-0 = 800
1976 They can be ordered either way, but the arm tools I've seen always put
1977 the lower one first. It probably doesn't matter. krk@cygnus.com
1979 XXX: Actually the order does matter. The second instruction (H-1)
1980 moves the computed address into the PC, so it must be the second one
1981 in the sequence. The problem, however is that whilst little endian code
1982 stores the instructions in HI then LOW order, big endian code does the
1983 reverse. nickc@cygnus.com. */
1985 #define LOW_HI_ORDER 0xF800F000
1986 #define HI_LOW_ORDER 0xF000F800
1989 insert_thumb_branch (insn32 br_insn
, int rel_off
)
1991 unsigned int low_bits
;
1992 unsigned int high_bits
;
1994 BFD_ASSERT ((rel_off
& 1) != 1);
1996 rel_off
>>= 1; /* Half word aligned address. */
1997 low_bits
= rel_off
& 0x000007FF; /* The bottom 11 bits. */
1998 high_bits
= (rel_off
>> 11) & 0x000007FF; /* The top 11 bits. */
2000 if ((br_insn
& LOW_HI_ORDER
) == LOW_HI_ORDER
)
2001 br_insn
= LOW_HI_ORDER
| (low_bits
<< 16) | high_bits
;
2002 else if ((br_insn
& HI_LOW_ORDER
) == HI_LOW_ORDER
)
2003 br_insn
= HI_LOW_ORDER
| (high_bits
<< 16) | low_bits
;
2005 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2006 abort (); /* Error - not a valid branch instruction form. */
2011 /* Thumb code calling an ARM function. */
2014 elf32_thumb_to_arm_stub (struct bfd_link_info
* info
,
2018 asection
* input_section
,
2019 bfd_byte
* hit_data
,
2022 bfd_signed_vma addend
,
2027 unsigned long int tmp
;
2028 long int ret_offset
;
2029 struct elf_link_hash_entry
* myh
;
2030 struct elf32_arm_link_hash_table
* globals
;
2032 myh
= find_thumb_glue (info
, name
, input_bfd
);
2036 globals
= elf32_arm_hash_table (info
);
2038 BFD_ASSERT (globals
!= NULL
);
2039 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
2041 my_offset
= myh
->root
.u
.def
.value
;
2043 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
2044 THUMB2ARM_GLUE_SECTION_NAME
);
2046 BFD_ASSERT (s
!= NULL
);
2047 BFD_ASSERT (s
->contents
!= NULL
);
2048 BFD_ASSERT (s
->output_section
!= NULL
);
2050 if ((my_offset
& 0x01) == 0x01)
2053 && sym_sec
->owner
!= NULL
2054 && !INTERWORK_FLAG (sym_sec
->owner
))
2056 (*_bfd_error_handler
)
2057 (_("%B(%s): warning: interworking not enabled.\n"
2058 " first occurrence: %B: thumb call to arm"),
2059 sym_sec
->owner
, input_bfd
, name
);
2065 myh
->root
.u
.def
.value
= my_offset
;
2067 bfd_put_16 (output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
2068 s
->contents
+ my_offset
);
2070 bfd_put_16 (output_bfd
, (bfd_vma
) t2a2_noop_insn
,
2071 s
->contents
+ my_offset
+ 2);
2074 /* Address of destination of the stub. */
2075 ((bfd_signed_vma
) val
)
2077 /* Offset from the start of the current section
2078 to the start of the stubs. */
2080 /* Offset of the start of this stub from the start of the stubs. */
2082 /* Address of the start of the current section. */
2083 + s
->output_section
->vma
)
2084 /* The branch instruction is 4 bytes into the stub. */
2086 /* ARM branches work from the pc of the instruction + 8. */
2089 bfd_put_32 (output_bfd
,
2090 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
2091 s
->contents
+ my_offset
+ 4);
2094 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
2096 /* Now go back and fix up the original BL insn to point to here. */
2098 /* Address of where the stub is located. */
2099 (s
->output_section
->vma
+ s
->output_offset
+ my_offset
)
2100 /* Address of where the BL is located. */
2101 - (input_section
->output_section
->vma
+ input_section
->output_offset
2103 /* Addend in the relocation. */
2105 /* Biassing for PC-relative addressing. */
2108 tmp
= bfd_get_32 (input_bfd
, hit_data
2109 - input_section
->vma
);
2111 bfd_put_32 (output_bfd
,
2112 (bfd_vma
) insert_thumb_branch (tmp
, ret_offset
),
2113 hit_data
- input_section
->vma
);
2118 /* Arm code calling a Thumb function. */
2121 elf32_arm_to_thumb_stub (struct bfd_link_info
* info
,
2125 asection
* input_section
,
2126 bfd_byte
* hit_data
,
2129 bfd_signed_vma addend
,
2132 unsigned long int tmp
;
2135 long int ret_offset
;
2136 struct elf_link_hash_entry
* myh
;
2137 struct elf32_arm_link_hash_table
* globals
;
2139 myh
= find_arm_glue (info
, name
, input_bfd
);
2143 globals
= elf32_arm_hash_table (info
);
2145 BFD_ASSERT (globals
!= NULL
);
2146 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
2148 my_offset
= myh
->root
.u
.def
.value
;
2149 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
2150 ARM2THUMB_GLUE_SECTION_NAME
);
2151 BFD_ASSERT (s
!= NULL
);
2152 BFD_ASSERT (s
->contents
!= NULL
);
2153 BFD_ASSERT (s
->output_section
!= NULL
);
2155 if ((my_offset
& 0x01) == 0x01)
2158 && sym_sec
->owner
!= NULL
2159 && !INTERWORK_FLAG (sym_sec
->owner
))
2161 (*_bfd_error_handler
)
2162 (_("%B(%s): warning: interworking not enabled.\n"
2163 " first occurrence: %B: arm call to thumb"),
2164 sym_sec
->owner
, input_bfd
, name
);
2168 myh
->root
.u
.def
.value
= my_offset
;
2170 bfd_put_32 (output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
2171 s
->contents
+ my_offset
);
2173 bfd_put_32 (output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
2174 s
->contents
+ my_offset
+ 4);
2176 /* It's a thumb address. Add the low order bit. */
2177 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
2178 s
->contents
+ my_offset
+ 8);
2181 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
2183 tmp
= bfd_get_32 (input_bfd
, hit_data
);
2184 tmp
= tmp
& 0xFF000000;
2186 /* Somehow these are both 4 too far, so subtract 8. */
2187 ret_offset
= (s
->output_offset
2189 + s
->output_section
->vma
2190 - (input_section
->output_offset
2191 + input_section
->output_section
->vma
2195 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
2197 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
, hit_data
- input_section
->vma
);
2204 /* Some relocations map to different relocations depending on the
2205 target. Return the real relocation. */
2207 arm_real_reloc_type (struct elf32_arm_link_hash_table
* globals
,
2213 if (globals
->target1_is_rel
)
2219 return globals
->target2_reloc
;
2225 #endif /* OLD_ARM_ABI */
2228 /* Perform a relocation as part of a final link. */
2230 static bfd_reloc_status_type
2231 elf32_arm_final_link_relocate (reloc_howto_type
* howto
,
2234 asection
* input_section
,
2235 bfd_byte
* contents
,
2236 Elf_Internal_Rela
* rel
,
2238 struct bfd_link_info
* info
,
2240 const char * sym_name
,
2242 struct elf_link_hash_entry
* h
)
2244 unsigned long r_type
= howto
->type
;
2245 unsigned long r_symndx
;
2246 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
2247 bfd
* dynobj
= NULL
;
2248 Elf_Internal_Shdr
* symtab_hdr
;
2249 struct elf_link_hash_entry
** sym_hashes
;
2250 bfd_vma
* local_got_offsets
;
2251 asection
* sgot
= NULL
;
2252 asection
* splt
= NULL
;
2253 asection
* sreloc
= NULL
;
2255 bfd_signed_vma signed_addend
;
2256 struct elf32_arm_link_hash_table
* globals
;
2258 globals
= elf32_arm_hash_table (info
);
2261 /* Some relocation type map to different relocations depending on the
2262 target. We pick the right one here. */
2263 r_type
= arm_real_reloc_type (globals
, r_type
);
2264 if (r_type
!= howto
->type
)
2265 howto
= elf32_arm_howto_from_type (r_type
);
2266 #endif /* OLD_ARM_ABI */
2268 /* If the start address has been set, then set the EF_ARM_HASENTRY
2269 flag. Setting this more than once is redundant, but the cost is
2270 not too high, and it keeps the code simple.
2272 The test is done here, rather than somewhere else, because the
2273 start address is only set just before the final link commences.
2275 Note - if the user deliberately sets a start address of 0, the
2276 flag will not be set. */
2277 if (bfd_get_start_address (output_bfd
) != 0)
2278 elf_elfheader (output_bfd
)->e_flags
|= EF_ARM_HASENTRY
;
2280 dynobj
= elf_hash_table (info
)->dynobj
;
2283 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2284 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2286 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2287 sym_hashes
= elf_sym_hashes (input_bfd
);
2288 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2289 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2292 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
2294 if (addend
& ((howto
->src_mask
+ 1) >> 1))
2297 signed_addend
&= ~ howto
->src_mask
;
2298 signed_addend
|= addend
;
2301 signed_addend
= addend
;
2303 addend
= signed_addend
= rel
->r_addend
;
2309 return bfd_reloc_ok
;
2321 /* r_symndx will be zero only for relocs against symbols
2322 from removed linkonce sections, or sections discarded by
2325 return bfd_reloc_ok
;
2327 /* Handle relocations which should use the PLT entry. ABS32/REL32
2328 will use the symbol's value, which may point to a PLT entry, but we
2329 don't need to handle that here. If we created a PLT entry, all
2330 branches in this object should go to it. */
2331 if ((r_type
!= R_ARM_ABS32
&& r_type
!= R_ARM_REL32
)
2334 && h
->plt
.offset
!= (bfd_vma
) -1)
2336 /* If we've created a .plt section, and assigned a PLT entry to
2337 this function, it should not be known to bind locally. If
2338 it were, we would have cleared the PLT entry. */
2339 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info
, h
));
2341 value
= (splt
->output_section
->vma
2342 + splt
->output_offset
2344 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2345 contents
, rel
->r_offset
, value
,
2349 /* When generating a shared object, these relocations are copied
2350 into the output file to be resolved at run time. */
2352 && (input_section
->flags
& SEC_ALLOC
)
2353 && (r_type
!= R_ARM_REL32
2354 || !SYMBOL_CALLS_LOCAL (info
, h
))
2356 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2357 || h
->root
.type
!= bfd_link_hash_undefweak
)
2358 && r_type
!= R_ARM_PC24
2360 && r_type
!= R_ARM_CALL
2361 && r_type
!= R_ARM_JUMP24
2362 && r_type
!= R_ARM_PREL31
2364 && r_type
!= R_ARM_PLT32
)
2366 Elf_Internal_Rela outrel
;
2368 bfd_boolean skip
, relocate
;
2374 name
= (bfd_elf_string_from_elf_section
2376 elf_elfheader (input_bfd
)->e_shstrndx
,
2377 elf_section_data (input_section
)->rel_hdr
.sh_name
));
2379 return bfd_reloc_notsupported
;
2381 BFD_ASSERT (strncmp (name
, ".rel", 4) == 0
2382 && strcmp (bfd_get_section_name (input_bfd
,
2386 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2387 BFD_ASSERT (sreloc
!= NULL
);
2394 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2396 if (outrel
.r_offset
== (bfd_vma
) -1)
2398 else if (outrel
.r_offset
== (bfd_vma
) -2)
2399 skip
= TRUE
, relocate
= TRUE
;
2400 outrel
.r_offset
+= (input_section
->output_section
->vma
2401 + input_section
->output_offset
);
2404 memset (&outrel
, 0, sizeof outrel
);
2409 || !h
->def_regular
))
2410 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2415 /* This symbol is local, or marked to become local. */
2417 if (sym_flags
== STT_ARM_TFUNC
)
2419 if (globals
->symbian_p
)
2421 /* On Symbian OS, the data segment and text segement
2422 can be relocated independently. Therefore, we
2423 must indicate the segment to which this
2424 relocation is relative. The BPABI allows us to
2425 use any symbol in the right segment; we just use
2426 the section symbol as it is convenient. (We
2427 cannot use the symbol given by "h" directly as it
2428 will not appear in the dynamic symbol table.) */
2429 symbol
= elf_section_data (sym_sec
->output_section
)->dynindx
;
2430 BFD_ASSERT (symbol
!= 0);
2433 /* On SVR4-ish systems, the dynamic loader cannot
2434 relocate the text and data segments independently,
2435 so the symbol does not matter. */
2437 outrel
.r_info
= ELF32_R_INFO (symbol
, R_ARM_RELATIVE
);
2440 loc
= sreloc
->contents
;
2441 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2442 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2444 /* If this reloc is against an external symbol, we do not want to
2445 fiddle with the addend. Otherwise, we need to include the symbol
2446 value so that it becomes an addend for the dynamic reloc. */
2448 return bfd_reloc_ok
;
2450 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2451 contents
, rel
->r_offset
, value
,
2454 else switch (r_type
)
2457 case R_ARM_XPC25
: /* Arm BLX instruction. */
2461 case R_ARM_PC24
: /* Arm B/BL instruction */
2464 if (r_type
== R_ARM_XPC25
)
2466 /* Check for Arm calling Arm function. */
2467 /* FIXME: Should we translate the instruction into a BL
2468 instruction instead ? */
2469 if (sym_flags
!= STT_ARM_TFUNC
)
2470 (*_bfd_error_handler
)
2471 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2473 h
? h
->root
.root
.string
: "(local)");
2478 /* Check for Arm calling Thumb function. */
2479 if (sym_flags
== STT_ARM_TFUNC
)
2481 elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
,
2482 output_bfd
, input_section
,
2483 hit_data
, sym_sec
, rel
->r_offset
,
2484 signed_addend
, value
);
2485 return bfd_reloc_ok
;
2489 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2491 S is the address of the symbol in the relocation.
2492 P is address of the instruction being relocated.
2493 A is the addend (extracted from the instruction) in bytes.
2495 S is held in 'value'.
2496 P is the base address of the section containing the
2497 instruction plus the offset of the reloc into that
2499 (input_section->output_section->vma +
2500 input_section->output_offset +
2502 A is the addend, converted into bytes, ie:
2505 Note: None of these operations have knowledge of the pipeline
2506 size of the processor, thus it is up to the assembler to
2507 encode this information into the addend. */
2508 value
-= (input_section
->output_section
->vma
2509 + input_section
->output_offset
);
2510 value
-= rel
->r_offset
;
2511 value
+= (signed_addend
<< howto
->size
);
2513 signed_addend
= value
;
2514 signed_addend
>>= howto
->rightshift
;
2516 /* It is not an error for an undefined weak reference to be
2517 out of range. Any program that branches to such a symbol
2518 is going to crash anyway, so there is no point worrying
2519 about getting the destination exactly right. */
2520 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2522 /* Perform a signed range check. */
2523 if ( signed_addend
> ((bfd_signed_vma
) (howto
->dst_mask
>> 1))
2524 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
2525 return bfd_reloc_overflow
;
2529 /* If necessary set the H bit in the BLX instruction. */
2530 if (r_type
== R_ARM_XPC25
&& ((value
& 2) == 2))
2531 value
= (signed_addend
& howto
->dst_mask
)
2532 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
))
2536 value
= (signed_addend
& howto
->dst_mask
)
2537 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
2542 if (sym_flags
== STT_ARM_TFUNC
)
2547 value
-= (input_section
->output_section
->vma
2548 + input_section
->output_offset
+ rel
->r_offset
);
2554 value
-= (input_section
->output_section
->vma
2555 + input_section
->output_offset
+ rel
->r_offset
);
2556 value
+= signed_addend
;
2557 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2559 /* Check for overflow */
2560 if ((value
^ (value
>> 1)) & (1 << 30))
2561 return bfd_reloc_overflow
;
2563 value
&= 0x7fffffff;
2564 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0x80000000);
2565 if (sym_flags
== STT_ARM_TFUNC
)
2571 bfd_put_32 (input_bfd
, value
, hit_data
);
2572 return bfd_reloc_ok
;
2576 if ((long) value
> 0x7f || (long) value
< -0x80)
2577 return bfd_reloc_overflow
;
2579 bfd_put_8 (input_bfd
, value
, hit_data
);
2580 return bfd_reloc_ok
;
2585 if ((long) value
> 0x7fff || (long) value
< -0x8000)
2586 return bfd_reloc_overflow
;
2588 bfd_put_16 (input_bfd
, value
, hit_data
);
2589 return bfd_reloc_ok
;
2592 /* Support ldr and str instruction for the arm */
2593 /* Also thumb b (unconditional branch). ??? Really? */
2596 if ((long) value
> 0x7ff || (long) value
< -0x800)
2597 return bfd_reloc_overflow
;
2599 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0xfffff000);
2600 bfd_put_32 (input_bfd
, value
, hit_data
);
2601 return bfd_reloc_ok
;
2603 case R_ARM_THM_ABS5
:
2604 /* Support ldr and str instructions for the thumb. */
2606 /* Need to refetch addend. */
2607 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
2608 /* ??? Need to determine shift amount from operand size. */
2609 addend
>>= howto
->rightshift
;
2613 /* ??? Isn't value unsigned? */
2614 if ((long) value
> 0x1f || (long) value
< -0x10)
2615 return bfd_reloc_overflow
;
2617 /* ??? Value needs to be properly shifted into place first. */
2618 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
2619 bfd_put_16 (input_bfd
, value
, hit_data
);
2620 return bfd_reloc_ok
;
2623 case R_ARM_THM_XPC22
:
2625 case R_ARM_THM_PC22
:
2626 /* Thumb BL (branch long instruction). */
2629 bfd_boolean overflow
= FALSE
;
2630 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
2631 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
2632 bfd_signed_vma reloc_signed_max
= ((1 << (howto
->bitsize
- 1)) - 1) >> howto
->rightshift
;
2633 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
2635 bfd_signed_vma signed_check
;
2638 /* Need to refetch the addend and squish the two 11 bit pieces
2641 bfd_vma upper
= upper_insn
& 0x7ff;
2642 bfd_vma lower
= lower_insn
& 0x7ff;
2643 upper
= (upper
^ 0x400) - 0x400; /* Sign extend. */
2644 addend
= (upper
<< 12) | (lower
<< 1);
2645 signed_addend
= addend
;
2649 if (r_type
== R_ARM_THM_XPC22
)
2651 /* Check for Thumb to Thumb call. */
2652 /* FIXME: Should we translate the instruction into a BL
2653 instruction instead ? */
2654 if (sym_flags
== STT_ARM_TFUNC
)
2655 (*_bfd_error_handler
)
2656 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2658 h
? h
->root
.root
.string
: "(local)");
2663 /* If it is not a call to Thumb, assume call to Arm.
2664 If it is a call relative to a section name, then it is not a
2665 function call at all, but rather a long jump. Calls through
2666 the PLT do not require stubs. */
2667 if (sym_flags
!= STT_ARM_TFUNC
&& sym_flags
!= STT_SECTION
2668 && (h
== NULL
|| splt
== NULL
2669 || h
->plt
.offset
== (bfd_vma
) -1))
2671 if (elf32_thumb_to_arm_stub
2672 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
2673 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
))
2674 return bfd_reloc_ok
;
2676 return bfd_reloc_dangerous
;
2680 /* Handle calls via the PLT. */
2681 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2683 value
= (splt
->output_section
->vma
2684 + splt
->output_offset
2686 /* Target the Thumb stub before the ARM PLT entry. */
2690 relocation
= value
+ signed_addend
;
2692 relocation
-= (input_section
->output_section
->vma
2693 + input_section
->output_offset
2696 check
= relocation
>> howto
->rightshift
;
2698 /* If this is a signed value, the rightshift just dropped
2699 leading 1 bits (assuming twos complement). */
2700 if ((bfd_signed_vma
) relocation
>= 0)
2701 signed_check
= check
;
2703 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
2705 /* Assumes two's complement. */
2706 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
2710 if (r_type
== R_ARM_THM_XPC22
2711 && ((lower_insn
& 0x1800) == 0x0800))
2712 /* For a BLX instruction, make sure that the relocation is rounded up
2713 to a word boundary. This follows the semantics of the instruction
2714 which specifies that bit 1 of the target address will come from bit
2715 1 of the base address. */
2716 relocation
= (relocation
+ 2) & ~ 3;
2718 /* Put RELOCATION back into the insn. */
2719 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff) | ((relocation
>> 12) & 0x7ff);
2720 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x7ff) | ((relocation
>> 1) & 0x7ff);
2722 /* Put the relocated value back in the object file: */
2723 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
2724 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
2726 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
2730 case R_ARM_THM_PC11
:
2731 /* Thumb B (branch) instruction). */
2733 bfd_signed_vma relocation
;
2734 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
2735 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
2736 bfd_signed_vma signed_check
;
2739 /* Need to refetch addend. */
2740 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
2741 if (addend
& ((howto
->src_mask
+ 1) >> 1))
2744 signed_addend
&= ~ howto
->src_mask
;
2745 signed_addend
|= addend
;
2748 signed_addend
= addend
;
2749 /* The value in the insn has been right shifted. We need to
2750 undo this, so that we can perform the address calculation
2751 in terms of bytes. */
2752 signed_addend
<<= howto
->rightshift
;
2754 relocation
= value
+ signed_addend
;
2756 relocation
-= (input_section
->output_section
->vma
2757 + input_section
->output_offset
2760 relocation
>>= howto
->rightshift
;
2761 signed_check
= relocation
;
2762 relocation
&= howto
->dst_mask
;
2763 relocation
|= (bfd_get_16 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
2765 bfd_put_16 (input_bfd
, relocation
, hit_data
);
2767 /* Assumes two's complement. */
2768 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
2769 return bfd_reloc_overflow
;
2771 return bfd_reloc_ok
;
2775 case R_ARM_ALU_PCREL7_0
:
2776 case R_ARM_ALU_PCREL15_8
:
2777 case R_ARM_ALU_PCREL23_15
:
2782 insn
= bfd_get_32 (input_bfd
, hit_data
);
2784 /* Extract the addend. */
2785 addend
= (insn
& 0xff) << ((insn
& 0xf00) >> 7);
2786 signed_addend
= addend
;
2788 relocation
= value
+ signed_addend
;
2790 relocation
-= (input_section
->output_section
->vma
2791 + input_section
->output_offset
2793 insn
= (insn
& ~0xfff)
2794 | ((howto
->bitpos
<< 7) & 0xf00)
2795 | ((relocation
>> howto
->bitpos
) & 0xff);
2796 bfd_put_32 (input_bfd
, value
, hit_data
);
2798 return bfd_reloc_ok
;
2801 case R_ARM_GNU_VTINHERIT
:
2802 case R_ARM_GNU_VTENTRY
:
2803 return bfd_reloc_ok
;
2806 return bfd_reloc_notsupported
;
2808 case R_ARM_GLOB_DAT
:
2809 return bfd_reloc_notsupported
;
2811 case R_ARM_JUMP_SLOT
:
2812 return bfd_reloc_notsupported
;
2814 case R_ARM_RELATIVE
:
2815 return bfd_reloc_notsupported
;
2818 /* Relocation is relative to the start of the
2819 global offset table. */
2821 BFD_ASSERT (sgot
!= NULL
);
2823 return bfd_reloc_notsupported
;
2825 /* If we are addressing a Thumb function, we need to adjust the
2826 address by one, so that attempts to call the function pointer will
2827 correctly interpret it as Thumb code. */
2828 if (sym_flags
== STT_ARM_TFUNC
)
2831 /* Note that sgot->output_offset is not involved in this
2832 calculation. We always want the start of .got. If we
2833 define _GLOBAL_OFFSET_TABLE in a different way, as is
2834 permitted by the ABI, we might have to change this
2836 value
-= sgot
->output_section
->vma
;
2837 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2838 contents
, rel
->r_offset
, value
,
2842 /* Use global offset table as symbol value. */
2843 BFD_ASSERT (sgot
!= NULL
);
2846 return bfd_reloc_notsupported
;
2848 value
= sgot
->output_section
->vma
;
2849 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2850 contents
, rel
->r_offset
, value
,
2855 case R_ARM_GOT_PREL
:
2857 /* Relocation is to the entry for this symbol in the
2858 global offset table. */
2860 return bfd_reloc_notsupported
;
2867 off
= h
->got
.offset
;
2868 BFD_ASSERT (off
!= (bfd_vma
) -1);
2869 dyn
= globals
->root
.dynamic_sections_created
;
2871 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2873 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2874 || (ELF_ST_VISIBILITY (h
->other
)
2875 && h
->root
.type
== bfd_link_hash_undefweak
))
2877 /* This is actually a static link, or it is a -Bsymbolic link
2878 and the symbol is defined locally. We must initialize this
2879 entry in the global offset table. Since the offset must
2880 always be a multiple of 4, we use the least significant bit
2881 to record whether we have initialized it already.
2883 When doing a dynamic link, we create a .rel.got relocation
2884 entry to initialize the value. This is done in the
2885 finish_dynamic_symbol routine. */
2890 /* If we are addressing a Thumb function, we need to
2891 adjust the address by one, so that attempts to
2892 call the function pointer will correctly
2893 interpret it as Thumb code. */
2894 if (sym_flags
== STT_ARM_TFUNC
)
2897 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
2902 value
= sgot
->output_offset
+ off
;
2908 BFD_ASSERT (local_got_offsets
!= NULL
&&
2909 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
2911 off
= local_got_offsets
[r_symndx
];
2913 /* The offset must always be a multiple of 4. We use the
2914 least significant bit to record whether we have already
2915 generated the necessary reloc. */
2920 /* If we are addressing a Thumb function, we need to
2921 adjust the address by one, so that attempts to
2922 call the function pointer will correctly
2923 interpret it as Thumb code. */
2924 if (sym_flags
== STT_ARM_TFUNC
)
2927 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
2932 Elf_Internal_Rela outrel
;
2935 srelgot
= bfd_get_section_by_name (dynobj
, ".rel.got");
2936 BFD_ASSERT (srelgot
!= NULL
);
2938 outrel
.r_offset
= (sgot
->output_section
->vma
2939 + sgot
->output_offset
2941 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
2942 loc
= srelgot
->contents
;
2943 loc
+= srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2944 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2947 local_got_offsets
[r_symndx
] |= 1;
2950 value
= sgot
->output_offset
+ off
;
2952 if (r_type
!= R_ARM_GOT32
)
2953 value
+= sgot
->output_section
->vma
;
2955 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2956 contents
, rel
->r_offset
, value
,
2960 return bfd_reloc_notsupported
;
2962 case R_ARM_AMP_VCALL9
:
2963 return bfd_reloc_notsupported
;
2965 case R_ARM_RSBREL32
:
2966 return bfd_reloc_notsupported
;
2968 case R_ARM_THM_RPC22
:
2969 return bfd_reloc_notsupported
;
2972 return bfd_reloc_notsupported
;
2975 return bfd_reloc_notsupported
;
2978 return bfd_reloc_notsupported
;
2981 return bfd_reloc_notsupported
;
2984 return bfd_reloc_notsupported
;
2989 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
2991 arm_add_to_rel (bfd
* abfd
,
2993 reloc_howto_type
* howto
,
2994 bfd_signed_vma increment
)
2996 bfd_signed_vma addend
;
2998 if (howto
->type
== R_ARM_THM_PC22
)
3000 int upper_insn
, lower_insn
;
3003 upper_insn
= bfd_get_16 (abfd
, address
);
3004 lower_insn
= bfd_get_16 (abfd
, address
+ 2);
3005 upper
= upper_insn
& 0x7ff;
3006 lower
= lower_insn
& 0x7ff;
3008 addend
= (upper
<< 12) | (lower
<< 1);
3009 addend
+= increment
;
3012 upper_insn
= (upper_insn
& 0xf800) | ((addend
>> 11) & 0x7ff);
3013 lower_insn
= (lower_insn
& 0xf800) | (addend
& 0x7ff);
3015 bfd_put_16 (abfd
, (bfd_vma
) upper_insn
, address
);
3016 bfd_put_16 (abfd
, (bfd_vma
) lower_insn
, address
+ 2);
3022 contents
= bfd_get_32 (abfd
, address
);
3024 /* Get the (signed) value from the instruction. */
3025 addend
= contents
& howto
->src_mask
;
3026 if (addend
& ((howto
->src_mask
+ 1) >> 1))
3028 bfd_signed_vma mask
;
3031 mask
&= ~ howto
->src_mask
;
3035 /* Add in the increment, (which is a byte value). */
3036 switch (howto
->type
)
3039 addend
+= increment
;
3047 addend
<<= howto
->size
;
3048 addend
+= increment
;
3050 /* Should we check for overflow here ? */
3052 /* Drop any undesired bits. */
3053 addend
>>= howto
->rightshift
;
3057 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
3059 bfd_put_32 (abfd
, contents
, address
);
3062 #endif /* USE_REL */
3064 /* Relocate an ARM ELF section. */
3066 elf32_arm_relocate_section (bfd
* output_bfd
,
3067 struct bfd_link_info
* info
,
3069 asection
* input_section
,
3070 bfd_byte
* contents
,
3071 Elf_Internal_Rela
* relocs
,
3072 Elf_Internal_Sym
* local_syms
,
3073 asection
** local_sections
)
3075 Elf_Internal_Shdr
*symtab_hdr
;
3076 struct elf_link_hash_entry
**sym_hashes
;
3077 Elf_Internal_Rela
*rel
;
3078 Elf_Internal_Rela
*relend
;
3080 struct elf32_arm_link_hash_table
* globals
;
3083 if (info
->relocatable
)
3087 globals
= elf32_arm_hash_table (info
);
3088 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
3089 sym_hashes
= elf_sym_hashes (input_bfd
);
3092 relend
= relocs
+ input_section
->reloc_count
;
3093 for (; rel
< relend
; rel
++)
3096 reloc_howto_type
* howto
;
3097 unsigned long r_symndx
;
3098 Elf_Internal_Sym
* sym
;
3100 struct elf_link_hash_entry
* h
;
3102 bfd_reloc_status_type r
;
3105 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3106 r_type
= ELF32_R_TYPE (rel
->r_info
);
3107 r_type
= arm_real_reloc_type (globals
, r_type
);
3109 if ( r_type
== R_ARM_GNU_VTENTRY
3110 || r_type
== R_ARM_GNU_VTINHERIT
)
3113 bfd_reloc
.howto
= elf32_arm_howto_from_type (r_type
);
3114 howto
= bfd_reloc
.howto
;
3117 if (info
->relocatable
)
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
3140 /* This is a final link. */
3145 if (r_symndx
< symtab_hdr
->sh_info
)
3147 sym
= local_syms
+ r_symndx
;
3148 sec
= local_sections
[r_symndx
];
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
);
3189 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
;
3434 /* Merge backend specific data from an object file to the output
3435 object file when linking. */
3438 elf32_arm_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
3442 bfd_boolean flags_compatible
= TRUE
;
3445 /* Check if we have the same endianess. */
3446 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
3449 if ( bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3450 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3453 /* The input BFD must have had its flags initialised. */
3454 /* The following seems bogus to me -- The flags are initialized in
3455 the assembler but I don't think an elf_flags_init field is
3456 written into the object. */
3457 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3459 in_flags
= elf_elfheader (ibfd
)->e_flags
;
3460 out_flags
= elf_elfheader (obfd
)->e_flags
;
3462 if (!elf_flags_init (obfd
))
3464 /* If the input is the default architecture and had the default
3465 flags then do not bother setting the flags for the output
3466 architecture, instead allow future merges to do this. If no
3467 future merges ever set these flags then they will retain their
3468 uninitialised values, which surprise surprise, correspond
3469 to the default values. */
3470 if (bfd_get_arch_info (ibfd
)->the_default
3471 && elf_elfheader (ibfd
)->e_flags
== 0)
3474 elf_flags_init (obfd
) = TRUE
;
3475 elf_elfheader (obfd
)->e_flags
= in_flags
;
3477 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
3478 && bfd_get_arch_info (obfd
)->the_default
)
3479 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
3484 /* Determine what should happen if the input ARM architecture
3485 does not match the output ARM architecture. */
3486 if (! bfd_arm_merge_machines (ibfd
, obfd
))
3489 /* Identical flags must be compatible. */
3490 if (in_flags
== out_flags
)
3493 /* Check to see if the input BFD actually contains any sections. If
3494 not, its flags may not have been initialised either, but it
3495 cannot actually cause any incompatibility. Do not short-circuit
3496 dynamic objects; their section list may be emptied by
3497 elf_link_add_object_symbols.
3499 Also check to see if there are no code sections in the input.
3500 In this case there is no need to check for code specific flags.
3501 XXX - do we need to worry about floating-point format compatability
3502 in data sections ? */
3503 if (!(ibfd
->flags
& DYNAMIC
))
3505 bfd_boolean null_input_bfd
= TRUE
;
3506 bfd_boolean only_data_sections
= TRUE
;
3508 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3510 /* Ignore synthetic glue sections. */
3511 if (strcmp (sec
->name
, ".glue_7")
3512 && strcmp (sec
->name
, ".glue_7t"))
3514 if ((bfd_get_section_flags (ibfd
, sec
)
3515 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
3516 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
3517 only_data_sections
= FALSE
;
3519 null_input_bfd
= FALSE
;
3524 if (null_input_bfd
|| only_data_sections
)
3528 /* Complain about various flag mismatches. */
3529 if (EF_ARM_EABI_VERSION (in_flags
) != EF_ARM_EABI_VERSION (out_flags
))
3532 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
3534 (in_flags
& EF_ARM_EABIMASK
) >> 24,
3535 (out_flags
& EF_ARM_EABIMASK
) >> 24);
3539 /* Not sure what needs to be checked for EABI versions >= 1. */
3540 if (EF_ARM_EABI_VERSION (in_flags
) == EF_ARM_EABI_UNKNOWN
)
3542 if ((in_flags
& EF_ARM_APCS_26
) != (out_flags
& EF_ARM_APCS_26
))
3545 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3547 in_flags
& EF_ARM_APCS_26
? 26 : 32,
3548 out_flags
& EF_ARM_APCS_26
? 26 : 32);
3549 flags_compatible
= FALSE
;
3552 if ((in_flags
& EF_ARM_APCS_FLOAT
) != (out_flags
& EF_ARM_APCS_FLOAT
))
3554 if (in_flags
& EF_ARM_APCS_FLOAT
)
3556 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3560 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3563 flags_compatible
= FALSE
;
3566 if ((in_flags
& EF_ARM_VFP_FLOAT
) != (out_flags
& EF_ARM_VFP_FLOAT
))
3568 if (in_flags
& EF_ARM_VFP_FLOAT
)
3570 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3574 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3577 flags_compatible
= FALSE
;
3580 if ((in_flags
& EF_ARM_MAVERICK_FLOAT
) != (out_flags
& EF_ARM_MAVERICK_FLOAT
))
3582 if (in_flags
& EF_ARM_MAVERICK_FLOAT
)
3584 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3588 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3591 flags_compatible
= FALSE
;
3594 #ifdef EF_ARM_SOFT_FLOAT
3595 if ((in_flags
& EF_ARM_SOFT_FLOAT
) != (out_flags
& EF_ARM_SOFT_FLOAT
))
3597 /* We can allow interworking between code that is VFP format
3598 layout, and uses either soft float or integer regs for
3599 passing floating point arguments and results. We already
3600 know that the APCS_FLOAT flags match; similarly for VFP
3602 if ((in_flags
& EF_ARM_APCS_FLOAT
) != 0
3603 || (in_flags
& EF_ARM_VFP_FLOAT
) == 0)
3605 if (in_flags
& EF_ARM_SOFT_FLOAT
)
3607 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3611 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3614 flags_compatible
= FALSE
;
3619 /* Interworking mismatch is only a warning. */
3620 if ((in_flags
& EF_ARM_INTERWORK
) != (out_flags
& EF_ARM_INTERWORK
))
3622 if (in_flags
& EF_ARM_INTERWORK
)
3625 (_("Warning: %B supports interworking, whereas %B does not"),
3631 (_("Warning: %B does not support interworking, whereas %B does"),
3637 return flags_compatible
;
3640 /* Display the flags field. */
3643 elf32_arm_print_private_bfd_data (bfd
*abfd
, void * ptr
)
3645 FILE * file
= (FILE *) ptr
;
3646 unsigned long flags
;
3648 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
3650 /* Print normal ELF private data. */
3651 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
3653 flags
= elf_elfheader (abfd
)->e_flags
;
3654 /* Ignore init flag - it may not be set, despite the flags field
3655 containing valid data. */
3657 /* xgettext:c-format */
3658 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
3660 switch (EF_ARM_EABI_VERSION (flags
))
3662 case EF_ARM_EABI_UNKNOWN
:
3663 /* The following flag bits are GNU extensions and not part of the
3664 official ARM ELF extended ABI. Hence they are only decoded if
3665 the EABI version is not set. */
3666 if (flags
& EF_ARM_INTERWORK
)
3667 fprintf (file
, _(" [interworking enabled]"));
3669 if (flags
& EF_ARM_APCS_26
)
3670 fprintf (file
, " [APCS-26]");
3672 fprintf (file
, " [APCS-32]");
3674 if (flags
& EF_ARM_VFP_FLOAT
)
3675 fprintf (file
, _(" [VFP float format]"));
3676 else if (flags
& EF_ARM_MAVERICK_FLOAT
)
3677 fprintf (file
, _(" [Maverick float format]"));
3679 fprintf (file
, _(" [FPA float format]"));
3681 if (flags
& EF_ARM_APCS_FLOAT
)
3682 fprintf (file
, _(" [floats passed in float registers]"));
3684 if (flags
& EF_ARM_PIC
)
3685 fprintf (file
, _(" [position independent]"));
3687 if (flags
& EF_ARM_NEW_ABI
)
3688 fprintf (file
, _(" [new ABI]"));
3690 if (flags
& EF_ARM_OLD_ABI
)
3691 fprintf (file
, _(" [old ABI]"));
3693 if (flags
& EF_ARM_SOFT_FLOAT
)
3694 fprintf (file
, _(" [software FP]"));
3696 flags
&= ~(EF_ARM_INTERWORK
| EF_ARM_APCS_26
| EF_ARM_APCS_FLOAT
3697 | EF_ARM_PIC
| EF_ARM_NEW_ABI
| EF_ARM_OLD_ABI
3698 | EF_ARM_SOFT_FLOAT
| EF_ARM_VFP_FLOAT
3699 | EF_ARM_MAVERICK_FLOAT
);
3702 case EF_ARM_EABI_VER1
:
3703 fprintf (file
, _(" [Version1 EABI]"));
3705 if (flags
& EF_ARM_SYMSARESORTED
)
3706 fprintf (file
, _(" [sorted symbol table]"));
3708 fprintf (file
, _(" [unsorted symbol table]"));
3710 flags
&= ~ EF_ARM_SYMSARESORTED
;
3713 case EF_ARM_EABI_VER2
:
3714 fprintf (file
, _(" [Version2 EABI]"));
3716 if (flags
& EF_ARM_SYMSARESORTED
)
3717 fprintf (file
, _(" [sorted symbol table]"));
3719 fprintf (file
, _(" [unsorted symbol table]"));
3721 if (flags
& EF_ARM_DYNSYMSUSESEGIDX
)
3722 fprintf (file
, _(" [dynamic symbols use segment index]"));
3724 if (flags
& EF_ARM_MAPSYMSFIRST
)
3725 fprintf (file
, _(" [mapping symbols precede others]"));
3727 flags
&= ~(EF_ARM_SYMSARESORTED
| EF_ARM_DYNSYMSUSESEGIDX
3728 | EF_ARM_MAPSYMSFIRST
);
3731 case EF_ARM_EABI_VER3
:
3732 fprintf (file
, _(" [Version3 EABI]"));
3735 case EF_ARM_EABI_VER4
:
3736 fprintf (file
, _(" [Version4 EABI]"));
3738 if (flags
& EF_ARM_BE8
)
3739 fprintf (file
, _(" [BE8]"));
3741 if (flags
& EF_ARM_LE8
)
3742 fprintf (file
, _(" [LE8]"));
3744 flags
&= ~(EF_ARM_LE8
| EF_ARM_BE8
);
3748 fprintf (file
, _(" <EABI version unrecognised>"));
3752 flags
&= ~ EF_ARM_EABIMASK
;
3754 if (flags
& EF_ARM_RELEXEC
)
3755 fprintf (file
, _(" [relocatable executable]"));
3757 if (flags
& EF_ARM_HASENTRY
)
3758 fprintf (file
, _(" [has entry point]"));
3760 flags
&= ~ (EF_ARM_RELEXEC
| EF_ARM_HASENTRY
);
3763 fprintf (file
, _("<Unrecognised flag bits set>"));
3771 elf32_arm_get_symbol_type (Elf_Internal_Sym
* elf_sym
, int type
)
3773 switch (ELF_ST_TYPE (elf_sym
->st_info
))
3776 return ELF_ST_TYPE (elf_sym
->st_info
);
3779 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3780 This allows us to distinguish between data used by Thumb instructions
3781 and non-data (which is probably code) inside Thumb regions of an
3783 if (type
!= STT_OBJECT
)
3784 return ELF_ST_TYPE (elf_sym
->st_info
);
3795 elf32_arm_gc_mark_hook (asection
* sec
,
3796 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
3797 Elf_Internal_Rela
* rel
,
3798 struct elf_link_hash_entry
* h
,
3799 Elf_Internal_Sym
* sym
)
3803 switch (ELF32_R_TYPE (rel
->r_info
))
3805 case R_ARM_GNU_VTINHERIT
:
3806 case R_ARM_GNU_VTENTRY
:
3810 switch (h
->root
.type
)
3812 case bfd_link_hash_defined
:
3813 case bfd_link_hash_defweak
:
3814 return h
->root
.u
.def
.section
;
3816 case bfd_link_hash_common
:
3817 return h
->root
.u
.c
.p
->section
;
3825 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
3830 /* Update the got entry reference counts for the section being removed. */
3833 elf32_arm_gc_sweep_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
3834 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
3835 asection
* sec ATTRIBUTE_UNUSED
,
3836 const Elf_Internal_Rela
* relocs ATTRIBUTE_UNUSED
)
3838 Elf_Internal_Shdr
*symtab_hdr
;
3839 struct elf_link_hash_entry
**sym_hashes
;
3840 bfd_signed_vma
*local_got_refcounts
;
3841 const Elf_Internal_Rela
*rel
, *relend
;
3842 unsigned long r_symndx
;
3843 struct elf_link_hash_entry
*h
;
3844 struct elf32_arm_link_hash_table
* globals
;
3846 globals
= elf32_arm_hash_table (info
);
3848 elf_section_data (sec
)->local_dynrel
= NULL
;
3850 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3851 sym_hashes
= elf_sym_hashes (abfd
);
3852 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3854 relend
= relocs
+ sec
->reloc_count
;
3855 for (rel
= relocs
; rel
< relend
; rel
++)
3859 r_type
= ELF32_R_TYPE (rel
->r_info
);
3861 r_type
= arm_real_reloc_type (globals
, r_type
);
3867 case R_ARM_GOT_PREL
:
3869 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3870 if (r_symndx
>= symtab_hdr
->sh_info
)
3872 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3873 if (h
->got
.refcount
> 0)
3874 h
->got
.refcount
-= 1;
3876 else if (local_got_refcounts
!= NULL
)
3878 if (local_got_refcounts
[r_symndx
] > 0)
3879 local_got_refcounts
[r_symndx
] -= 1;
3892 case R_ARM_THM_PC22
:
3893 /* Should the interworking branches be here also? */
3895 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3896 if (r_symndx
>= symtab_hdr
->sh_info
)
3898 struct elf32_arm_link_hash_entry
*eh
;
3899 struct elf32_arm_relocs_copied
**pp
;
3900 struct elf32_arm_relocs_copied
*p
;
3902 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3903 eh
= (struct elf32_arm_link_hash_entry
*) h
;
3905 if (h
->plt
.refcount
> 0)
3907 h
->plt
.refcount
-= 1;
3908 if (ELF32_R_TYPE (rel
->r_info
) == R_ARM_THM_PC22
)
3909 eh
->plt_thumb_refcount
--;
3912 if (r_type
== R_ARM_ABS32
3913 || r_type
== R_ARM_REL32
)
3915 for (pp
= &eh
->relocs_copied
; (p
= *pp
) != NULL
;
3917 if (p
->section
== sec
)
3936 /* Look through the relocs for a section during the first phase. */
3939 elf32_arm_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
3940 asection
*sec
, const Elf_Internal_Rela
*relocs
)
3942 Elf_Internal_Shdr
*symtab_hdr
;
3943 struct elf_link_hash_entry
**sym_hashes
;
3944 struct elf_link_hash_entry
**sym_hashes_end
;
3945 const Elf_Internal_Rela
*rel
;
3946 const Elf_Internal_Rela
*rel_end
;
3949 bfd_vma
*local_got_offsets
;
3950 struct elf32_arm_link_hash_table
*htab
;
3952 if (info
->relocatable
)
3955 htab
= elf32_arm_hash_table (info
);
3958 dynobj
= elf_hash_table (info
)->dynobj
;
3959 local_got_offsets
= elf_local_got_offsets (abfd
);
3961 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3962 sym_hashes
= elf_sym_hashes (abfd
);
3963 sym_hashes_end
= sym_hashes
3964 + symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
3966 if (!elf_bad_symtab (abfd
))
3967 sym_hashes_end
-= symtab_hdr
->sh_info
;
3969 rel_end
= relocs
+ sec
->reloc_count
;
3970 for (rel
= relocs
; rel
< rel_end
; rel
++)
3972 struct elf_link_hash_entry
*h
;
3973 struct elf32_arm_link_hash_entry
*eh
;
3974 unsigned long r_symndx
;
3977 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3978 r_type
= ELF32_R_TYPE (rel
->r_info
);
3980 r_type
= arm_real_reloc_type (htab
, r_type
);
3982 if (r_symndx
< symtab_hdr
->sh_info
)
3985 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3987 eh
= (struct elf32_arm_link_hash_entry
*) h
;
3993 case R_ARM_GOT_PREL
:
3995 /* This symbol requires a global offset table entry. */
4002 bfd_signed_vma
*local_got_refcounts
;
4004 /* This is a global offset table entry for a local symbol. */
4005 local_got_refcounts
= elf_local_got_refcounts (abfd
);
4006 if (local_got_refcounts
== NULL
)
4010 size
= symtab_hdr
->sh_info
;
4011 size
*= (sizeof (bfd_signed_vma
) + sizeof (char));
4012 local_got_refcounts
= bfd_zalloc (abfd
, size
);
4013 if (local_got_refcounts
== NULL
)
4015 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
4017 local_got_refcounts
[r_symndx
] += 1;
4019 if (r_type
== R_ARM_GOT32
)
4025 if (htab
->sgot
== NULL
)
4027 if (htab
->root
.dynobj
== NULL
)
4028 htab
->root
.dynobj
= abfd
;
4029 if (!create_got_section (htab
->root
.dynobj
, info
))
4043 case R_ARM_THM_PC22
:
4044 /* Should the interworking branches be listed here? */
4047 /* If this reloc is in a read-only section, we might
4048 need a copy reloc. We can't check reliably at this
4049 stage whether the section is read-only, as input
4050 sections have not yet been mapped to output sections.
4051 Tentatively set the flag for now, and correct in
4052 adjust_dynamic_symbol. */
4056 /* We may need a .plt entry if the function this reloc
4057 refers to is in a different object. We can't tell for
4058 sure yet, because something later might force the
4060 if (r_type
== R_ARM_PC24
4062 || r_type
== R_ARM_CALL
4063 || r_type
== R_ARM_JUMP24
4064 || r_type
== R_ARM_PREL31
4066 || r_type
== R_ARM_PLT32
4067 || r_type
== R_ARM_THM_PC22
)
4070 /* If we create a PLT entry, this relocation will reference
4071 it, even if it's an ABS32 relocation. */
4072 h
->plt
.refcount
+= 1;
4074 if (r_type
== R_ARM_THM_PC22
)
4075 eh
->plt_thumb_refcount
+= 1;
4078 /* If we are creating a shared library, and this is a reloc
4079 against a global symbol, or a non PC relative reloc
4080 against a local symbol, then we need to copy the reloc
4081 into the shared library. However, if we are linking with
4082 -Bsymbolic, we do not need to copy a reloc against a
4083 global symbol which is defined in an object we are
4084 including in the link (i.e., DEF_REGULAR is set). At
4085 this point we have not seen all the input files, so it is
4086 possible that DEF_REGULAR is not set now but will be set
4087 later (it is never cleared). We account for that
4088 possibility below by storing information in the
4089 relocs_copied field of the hash table entry. */
4091 && (sec
->flags
& SEC_ALLOC
) != 0
4092 && ((r_type
!= R_ARM_PC24
4093 && r_type
!= R_ARM_PLT32
4095 && r_type
!= R_ARM_CALL
4096 && r_type
!= R_ARM_JUMP24
4097 && r_type
!= R_ARM_PREL31
4099 && r_type
!= R_ARM_REL32
4100 && r_type
!= R_ARM_THM_PC22
)
4102 && (! info
->symbolic
4103 || !h
->def_regular
))))
4105 struct elf32_arm_relocs_copied
*p
, **head
;
4107 /* When creating a shared object, we must copy these
4108 reloc types into the output file. We create a reloc
4109 section in dynobj and make room for this reloc. */
4114 name
= (bfd_elf_string_from_elf_section
4116 elf_elfheader (abfd
)->e_shstrndx
,
4117 elf_section_data (sec
)->rel_hdr
.sh_name
));
4121 BFD_ASSERT (strncmp (name
, ".rel", 4) == 0
4122 && strcmp (bfd_get_section_name (abfd
, sec
),
4125 sreloc
= bfd_get_section_by_name (dynobj
, name
);
4130 sreloc
= bfd_make_section (dynobj
, name
);
4131 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
4132 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
4133 if ((sec
->flags
& SEC_ALLOC
) != 0
4134 /* BPABI objects never have dynamic
4135 relocations mapped. */
4136 && !htab
->symbian_p
)
4137 flags
|= SEC_ALLOC
| SEC_LOAD
;
4139 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
4140 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
4144 elf_section_data (sec
)->sreloc
= sreloc
;
4147 /* If this is a global symbol, we count the number of
4148 relocations we need for this symbol. */
4151 head
= &((struct elf32_arm_link_hash_entry
*) h
)->relocs_copied
;
4155 /* Track dynamic relocs needed for local syms too.
4156 We really need local syms available to do this
4160 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
4165 head
= ((struct elf32_arm_relocs_copied
**)
4166 &elf_section_data (s
)->local_dynrel
);
4170 if (p
== NULL
|| p
->section
!= sec
)
4172 bfd_size_type amt
= sizeof *p
;
4174 p
= bfd_alloc (htab
->root
.dynobj
, amt
);
4183 if (r_type
== R_ARM_ABS32
4184 || r_type
== R_ARM_REL32
)
4189 /* This relocation describes the C++ object vtable hierarchy.
4190 Reconstruct it for later use during GC. */
4191 case R_ARM_GNU_VTINHERIT
:
4192 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4196 /* This relocation describes which C++ vtable entries are actually
4197 used. Record for later use during GC. */
4198 case R_ARM_GNU_VTENTRY
:
4199 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
4209 is_arm_mapping_symbol_name (const char * name
)
4211 return (name
!= NULL
)
4213 && ((name
[1] == 'a') || (name
[1] == 't') || (name
[1] == 'd'))
4217 /* Treat mapping symbols as special target symbols. */
4220 elf32_arm_is_target_special_symbol (bfd
* abfd ATTRIBUTE_UNUSED
, asymbol
* sym
)
4222 return is_arm_mapping_symbol_name (sym
->name
);
4225 /* This is a copy of elf_find_function() from elf.c except that
4226 ARM mapping symbols are ignored when looking for function names
4227 and STT_ARM_TFUNC is considered to a function type. */
4230 arm_elf_find_function (bfd
* abfd ATTRIBUTE_UNUSED
,
4234 const char ** filename_ptr
,
4235 const char ** functionname_ptr
)
4237 const char * filename
= NULL
;
4238 asymbol
* func
= NULL
;
4239 bfd_vma low_func
= 0;
4242 for (p
= symbols
; *p
!= NULL
; p
++)
4246 q
= (elf_symbol_type
*) *p
;
4248 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
4253 filename
= bfd_asymbol_name (&q
->symbol
);
4257 /* Skip $a and $t symbols. */
4258 if ((q
->symbol
.flags
& BSF_LOCAL
)
4259 && is_arm_mapping_symbol_name (q
->symbol
.name
))
4263 if (bfd_get_section (&q
->symbol
) == section
4264 && q
->symbol
.value
>= low_func
4265 && q
->symbol
.value
<= offset
)
4267 func
= (asymbol
*) q
;
4268 low_func
= q
->symbol
.value
;
4278 *filename_ptr
= filename
;
4279 if (functionname_ptr
)
4280 *functionname_ptr
= bfd_asymbol_name (func
);
4286 /* Find the nearest line to a particular section and offset, for error
4287 reporting. This code is a duplicate of the code in elf.c, except
4288 that it uses arm_elf_find_function. */
4291 elf32_arm_find_nearest_line (bfd
* abfd
,
4295 const char ** filename_ptr
,
4296 const char ** functionname_ptr
,
4297 unsigned int * line_ptr
)
4299 bfd_boolean found
= FALSE
;
4301 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4303 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
4304 filename_ptr
, functionname_ptr
,
4306 & elf_tdata (abfd
)->dwarf2_find_line_info
))
4308 if (!*functionname_ptr
)
4309 arm_elf_find_function (abfd
, section
, symbols
, offset
,
4310 *filename_ptr
? NULL
: filename_ptr
,
4316 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
4317 & found
, filename_ptr
,
4318 functionname_ptr
, line_ptr
,
4319 & elf_tdata (abfd
)->line_info
))
4322 if (found
&& (*functionname_ptr
|| *line_ptr
))
4325 if (symbols
== NULL
)
4328 if (! arm_elf_find_function (abfd
, section
, symbols
, offset
,
4329 filename_ptr
, functionname_ptr
))
4336 /* Adjust a symbol defined by a dynamic object and referenced by a
4337 regular object. The current definition is in some section of the
4338 dynamic object, but we're not including those sections. We have to
4339 change the definition to something the rest of the link can
4343 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info
* info
,
4344 struct elf_link_hash_entry
* h
)
4348 unsigned int power_of_two
;
4349 struct elf32_arm_link_hash_entry
* eh
;
4351 dynobj
= elf_hash_table (info
)->dynobj
;
4353 /* Make sure we know what is going on here. */
4354 BFD_ASSERT (dynobj
!= NULL
4356 || h
->u
.weakdef
!= NULL
4359 && !h
->def_regular
)));
4361 eh
= (struct elf32_arm_link_hash_entry
*) h
;
4363 /* If this is a function, put it in the procedure linkage table. We
4364 will fill in the contents of the procedure linkage table later,
4365 when we know the address of the .got section. */
4366 if (h
->type
== STT_FUNC
|| h
->type
== STT_ARM_TFUNC
4369 if (h
->plt
.refcount
<= 0
4370 || SYMBOL_CALLS_LOCAL (info
, h
)
4371 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
4372 && h
->root
.type
== bfd_link_hash_undefweak
))
4374 /* This case can occur if we saw a PLT32 reloc in an input
4375 file, but the symbol was never referred to by a dynamic
4376 object, or if all references were garbage collected. In
4377 such a case, we don't actually need to build a procedure
4378 linkage table, and we can just do a PC24 reloc instead. */
4379 h
->plt
.offset
= (bfd_vma
) -1;
4380 eh
->plt_thumb_refcount
= 0;
4388 /* It's possible that we incorrectly decided a .plt reloc was
4389 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4390 in check_relocs. We can't decide accurately between function
4391 and non-function syms in check-relocs; Objects loaded later in
4392 the link may change h->type. So fix it now. */
4393 h
->plt
.offset
= (bfd_vma
) -1;
4394 eh
->plt_thumb_refcount
= 0;
4397 /* If this is a weak symbol, and there is a real definition, the
4398 processor independent code will have arranged for us to see the
4399 real definition first, and we can just use the same value. */
4400 if (h
->u
.weakdef
!= NULL
)
4402 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
4403 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
4404 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
4405 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
4409 /* This is a reference to a symbol defined by a dynamic object which
4410 is not a function. */
4412 /* If we are creating a shared library, we must presume that the
4413 only references to the symbol are via the global offset table.
4414 For such cases we need not do anything here; the relocations will
4415 be handled correctly by relocate_section. */
4419 /* We must allocate the symbol in our .dynbss section, which will
4420 become part of the .bss section of the executable. There will be
4421 an entry for this symbol in the .dynsym section. The dynamic
4422 object will contain position independent code, so all references
4423 from the dynamic object to this symbol will go through the global
4424 offset table. The dynamic linker will use the .dynsym entry to
4425 determine the address it must put in the global offset table, so
4426 both the dynamic object and the regular object will refer to the
4427 same memory location for the variable. */
4428 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
4429 BFD_ASSERT (s
!= NULL
);
4431 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4432 copy the initial value out of the dynamic object and into the
4433 runtime process image. We need to remember the offset into the
4434 .rel.bss section we are going to use. */
4435 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
4439 srel
= bfd_get_section_by_name (dynobj
, ".rel.bss");
4440 BFD_ASSERT (srel
!= NULL
);
4441 srel
->size
+= sizeof (Elf32_External_Rel
);
4445 /* We need to figure out the alignment required for this symbol. I
4446 have no idea how ELF linkers handle this. */
4447 power_of_two
= bfd_log2 (h
->size
);
4448 if (power_of_two
> 3)
4451 /* Apply the required alignment. */
4452 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
4453 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
4455 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
4459 /* Define the symbol as being at this point in the section. */
4460 h
->root
.u
.def
.section
= s
;
4461 h
->root
.u
.def
.value
= s
->size
;
4463 /* Increment the section size to make room for the symbol. */
4469 /* Allocate space in .plt, .got and associated reloc sections for
4473 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
4475 struct bfd_link_info
*info
;
4476 struct elf32_arm_link_hash_table
*htab
;
4477 struct elf32_arm_link_hash_entry
*eh
;
4478 struct elf32_arm_relocs_copied
*p
;
4480 eh
= (struct elf32_arm_link_hash_entry
*) h
;
4482 if (h
->root
.type
== bfd_link_hash_indirect
)
4485 if (h
->root
.type
== bfd_link_hash_warning
)
4486 /* When warning symbols are created, they **replace** the "real"
4487 entry in the hash table, thus we never get to see the real
4488 symbol in a hash traversal. So look at it now. */
4489 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4491 info
= (struct bfd_link_info
*) inf
;
4492 htab
= elf32_arm_hash_table (info
);
4494 if (htab
->root
.dynamic_sections_created
4495 && h
->plt
.refcount
> 0)
4497 /* Make sure this symbol is output as a dynamic symbol.
4498 Undefined weak syms won't yet be marked as dynamic. */
4499 if (h
->dynindx
== -1
4500 && !h
->forced_local
)
4502 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4507 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
4509 asection
*s
= htab
->splt
;
4511 /* If this is the first .plt entry, make room for the special
4514 s
->size
+= htab
->plt_header_size
;
4516 h
->plt
.offset
= s
->size
;
4518 /* If we will insert a Thumb trampoline before this PLT, leave room
4520 if (!htab
->symbian_p
&& eh
->plt_thumb_refcount
> 0)
4522 h
->plt
.offset
+= PLT_THUMB_STUB_SIZE
;
4523 s
->size
+= PLT_THUMB_STUB_SIZE
;
4526 /* If this symbol is not defined in a regular file, and we are
4527 not generating a shared library, then set the symbol to this
4528 location in the .plt. This is required to make function
4529 pointers compare as equal between the normal executable and
4530 the shared library. */
4534 h
->root
.u
.def
.section
= s
;
4535 h
->root
.u
.def
.value
= h
->plt
.offset
;
4537 /* Make sure the function is not marked as Thumb, in case
4538 it is the target of an ABS32 relocation, which will
4539 point to the PLT entry. */
4540 if (ELF_ST_TYPE (h
->type
) == STT_ARM_TFUNC
)
4541 h
->type
= ELF_ST_INFO (ELF_ST_BIND (h
->type
), STT_FUNC
);
4544 /* Make room for this entry. */
4545 s
->size
+= htab
->plt_entry_size
;
4547 if (!htab
->symbian_p
)
4549 /* We also need to make an entry in the .got.plt section, which
4550 will be placed in the .got section by the linker script. */
4551 eh
->plt_got_offset
= htab
->sgotplt
->size
;
4552 htab
->sgotplt
->size
+= 4;
4555 /* We also need to make an entry in the .rel.plt section. */
4556 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
4560 h
->plt
.offset
= (bfd_vma
) -1;
4566 h
->plt
.offset
= (bfd_vma
) -1;
4570 if (h
->got
.refcount
> 0)
4575 /* Make sure this symbol is output as a dynamic symbol.
4576 Undefined weak syms won't yet be marked as dynamic. */
4577 if (h
->dynindx
== -1
4578 && !h
->forced_local
)
4580 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4584 if (!htab
->symbian_p
)
4587 h
->got
.offset
= s
->size
;
4589 dyn
= htab
->root
.dynamic_sections_created
;
4590 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4591 || h
->root
.type
!= bfd_link_hash_undefweak
)
4593 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
4594 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
4598 h
->got
.offset
= (bfd_vma
) -1;
4600 if (eh
->relocs_copied
== NULL
)
4603 /* In the shared -Bsymbolic case, discard space allocated for
4604 dynamic pc-relative relocs against symbols which turn out to be
4605 defined in regular objects. For the normal shared case, discard
4606 space for pc-relative relocs that have become local due to symbol
4607 visibility changes. */
4611 /* Discard relocs on undefined weak syms with non-default
4613 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
4614 && h
->root
.type
== bfd_link_hash_undefweak
)
4615 eh
->relocs_copied
= NULL
;
4619 /* For the non-shared case, discard space for relocs against
4620 symbols which turn out to need copy relocs or are not
4626 || (htab
->root
.dynamic_sections_created
4627 && (h
->root
.type
== bfd_link_hash_undefweak
4628 || h
->root
.type
== bfd_link_hash_undefined
))))
4630 /* Make sure this symbol is output as a dynamic symbol.
4631 Undefined weak syms won't yet be marked as dynamic. */
4632 if (h
->dynindx
== -1
4633 && !h
->forced_local
)
4635 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4639 /* If that succeeded, we know we'll be keeping all the
4641 if (h
->dynindx
!= -1)
4645 eh
->relocs_copied
= NULL
;
4650 /* Finally, allocate space. */
4651 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
4653 asection
*sreloc
= elf_section_data (p
->section
)->sreloc
;
4654 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
4660 /* Find any dynamic relocs that apply to read-only sections. */
4663 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry
*h
, PTR inf
)
4665 struct elf32_arm_link_hash_entry
*eh
;
4666 struct elf32_arm_relocs_copied
*p
;
4668 if (h
->root
.type
== bfd_link_hash_warning
)
4669 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4671 eh
= (struct elf32_arm_link_hash_entry
*) h
;
4672 for (p
= eh
->relocs_copied
; p
!= NULL
; p
= p
->next
)
4674 asection
*s
= p
->section
;
4676 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
4678 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4680 info
->flags
|= DF_TEXTREL
;
4682 /* Not an error, just cut short the traversal. */
4689 /* Set the sizes of the dynamic sections. */
4692 elf32_arm_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4693 struct bfd_link_info
* info
)
4700 struct elf32_arm_link_hash_table
*htab
;
4702 htab
= elf32_arm_hash_table (info
);
4703 dynobj
= elf_hash_table (info
)->dynobj
;
4704 BFD_ASSERT (dynobj
!= NULL
);
4706 if (elf_hash_table (info
)->dynamic_sections_created
)
4708 /* Set the contents of the .interp section to the interpreter. */
4709 if (info
->executable
)
4711 s
= bfd_get_section_by_name (dynobj
, ".interp");
4712 BFD_ASSERT (s
!= NULL
);
4713 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
4714 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
4718 /* Set up .got offsets for local syms, and space for local dynamic
4720 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
4722 bfd_signed_vma
*local_got
;
4723 bfd_signed_vma
*end_local_got
;
4724 char *local_tls_type
;
4725 bfd_size_type locsymcount
;
4726 Elf_Internal_Shdr
*symtab_hdr
;
4729 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
4732 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
4734 struct elf32_arm_relocs_copied
*p
;
4736 for (p
= *((struct elf32_arm_relocs_copied
**)
4737 &elf_section_data (s
)->local_dynrel
);
4741 if (!bfd_is_abs_section (p
->section
)
4742 && bfd_is_abs_section (p
->section
->output_section
))
4744 /* Input section has been discarded, either because
4745 it is a copy of a linkonce section or due to
4746 linker script /DISCARD/, so we'll be discarding
4749 else if (p
->count
!= 0)
4751 srel
= elf_section_data (p
->section
)->sreloc
;
4752 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
4753 if ((p
->section
->output_section
->flags
& SEC_READONLY
) != 0)
4754 info
->flags
|= DF_TEXTREL
;
4759 local_got
= elf_local_got_refcounts (ibfd
);
4763 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
4764 locsymcount
= symtab_hdr
->sh_info
;
4765 end_local_got
= local_got
+ locsymcount
;
4767 srel
= htab
->srelgot
;
4768 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
4772 *local_got
= s
->size
;
4775 srel
->size
+= sizeof (Elf32_External_Rel
);
4778 *local_got
= (bfd_vma
) -1;
4782 /* Allocate global sym .plt and .got entries, and space for global
4783 sym dynamic relocs. */
4784 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs
, info
);
4786 /* The check_relocs and adjust_dynamic_symbol entry points have
4787 determined the sizes of the various dynamic sections. Allocate
4791 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
4796 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
4799 /* It's OK to base decisions on the section name, because none
4800 of the dynobj section names depend upon the input files. */
4801 name
= bfd_get_section_name (dynobj
, s
);
4805 if (strcmp (name
, ".plt") == 0)
4809 /* Strip this section if we don't need it; see the
4815 /* Remember whether there is a PLT. */
4819 else if (strncmp (name
, ".rel", 4) == 0)
4823 /* If we don't need this section, strip it from the
4824 output file. This is mostly to handle .rel.bss and
4825 .rel.plt. We must create both sections in
4826 create_dynamic_sections, because they must be created
4827 before the linker maps input sections to output
4828 sections. The linker does that before
4829 adjust_dynamic_symbol is called, and it is that
4830 function which decides whether anything needs to go
4831 into these sections. */
4836 /* Remember whether there are any reloc sections other
4838 if (strcmp (name
, ".rel.plt") != 0)
4841 /* We use the reloc_count field as a counter if we need
4842 to copy relocs into the output file. */
4846 else if (strncmp (name
, ".got", 4) != 0)
4848 /* It's not one of our sections, so don't allocate space. */
4854 _bfd_strip_section_from_output (info
, s
);
4858 /* Allocate memory for the section contents. */
4859 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
4860 if (s
->contents
== NULL
&& s
->size
!= 0)
4864 if (elf_hash_table (info
)->dynamic_sections_created
)
4866 /* Add some entries to the .dynamic section. We fill in the
4867 values later, in elf32_arm_finish_dynamic_sections, but we
4868 must add the entries now so that we get the correct size for
4869 the .dynamic section. The DT_DEBUG entry is filled in by the
4870 dynamic linker and used by the debugger. */
4871 #define add_dynamic_entry(TAG, VAL) \
4872 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4876 if (!add_dynamic_entry (DT_DEBUG
, 0))
4882 if ( !add_dynamic_entry (DT_PLTGOT
, 0)
4883 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
4884 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
4885 || !add_dynamic_entry (DT_JMPREL
, 0))
4891 if ( !add_dynamic_entry (DT_REL
, 0)
4892 || !add_dynamic_entry (DT_RELSZ
, 0)
4893 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
4897 /* If any dynamic relocs apply to a read-only section,
4898 then we need a DT_TEXTREL entry. */
4899 if ((info
->flags
& DF_TEXTREL
) == 0)
4900 elf_link_hash_traverse (&htab
->root
, elf32_arm_readonly_dynrelocs
,
4903 if ((info
->flags
& DF_TEXTREL
) != 0)
4905 if (!add_dynamic_entry (DT_TEXTREL
, 0))
4907 info
->flags
|= DF_TEXTREL
;
4910 #undef add_synamic_entry
4915 /* Finish up dynamic symbol handling. We set the contents of various
4916 dynamic sections here. */
4919 elf32_arm_finish_dynamic_symbol (bfd
* output_bfd
, struct bfd_link_info
* info
,
4920 struct elf_link_hash_entry
* h
, Elf_Internal_Sym
* sym
)
4923 struct elf32_arm_link_hash_table
*htab
;
4924 struct elf32_arm_link_hash_entry
*eh
;
4926 dynobj
= elf_hash_table (info
)->dynobj
;
4927 htab
= elf32_arm_hash_table (info
);
4928 eh
= (struct elf32_arm_link_hash_entry
*) h
;
4930 if (h
->plt
.offset
!= (bfd_vma
) -1)
4936 Elf_Internal_Rela rel
;
4938 /* This symbol has an entry in the procedure linkage table. Set
4941 BFD_ASSERT (h
->dynindx
!= -1);
4943 splt
= bfd_get_section_by_name (dynobj
, ".plt");
4944 srel
= bfd_get_section_by_name (dynobj
, ".rel.plt");
4945 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
4947 /* Fill in the entry in the procedure linkage table. */
4948 if (htab
->symbian_p
)
4951 for (i
= 0; i
< htab
->plt_entry_size
/ 4; ++i
)
4952 bfd_put_32 (output_bfd
,
4953 elf32_arm_symbian_plt_entry
[i
],
4954 splt
->contents
+ h
->plt
.offset
+ 4 * i
);
4956 /* Fill in the entry in the .rel.plt section. */
4957 rel
.r_offset
= (splt
->output_section
->vma
4958 + splt
->output_offset
4959 + h
->plt
.offset
+ 4 * (i
- 1));
4960 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
4962 /* Get the index in the procedure linkage table which
4963 corresponds to this symbol. This is the index of this symbol
4964 in all the symbols for which we are making plt entries. The
4965 first entry in the procedure linkage table is reserved. */
4966 plt_index
= ((h
->plt
.offset
- htab
->plt_header_size
)
4967 / htab
->plt_entry_size
);
4972 bfd_vma got_displacement
;
4975 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
4976 BFD_ASSERT (sgot
!= NULL
);
4978 /* Get the offset into the .got.plt table of the entry that
4979 corresponds to this function. */
4980 got_offset
= eh
->plt_got_offset
;
4982 /* Get the index in the procedure linkage table which
4983 corresponds to this symbol. This is the index of this symbol
4984 in all the symbols for which we are making plt entries. The
4985 first three entries in .got.plt are reserved; after that
4986 symbols appear in the same order as in .plt. */
4987 plt_index
= (got_offset
- 12) / 4;
4989 /* Calculate the displacement between the PLT slot and the
4990 entry in the GOT. The eight-byte offset accounts for the
4991 value produced by adding to pc in the first instruction
4993 got_displacement
= (sgot
->output_section
->vma
4994 + sgot
->output_offset
4996 - splt
->output_section
->vma
4997 - splt
->output_offset
5001 BFD_ASSERT ((got_displacement
& 0xf0000000) == 0);
5003 if (eh
->plt_thumb_refcount
> 0)
5005 bfd_put_16 (output_bfd
, elf32_arm_plt_thumb_stub
[0],
5006 splt
->contents
+ h
->plt
.offset
- 4);
5007 bfd_put_16 (output_bfd
, elf32_arm_plt_thumb_stub
[1],
5008 splt
->contents
+ h
->plt
.offset
- 2);
5011 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[0] | ((got_displacement
& 0x0ff00000) >> 20),
5012 splt
->contents
+ h
->plt
.offset
+ 0);
5013 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[1] | ((got_displacement
& 0x000ff000) >> 12),
5014 splt
->contents
+ h
->plt
.offset
+ 4);
5015 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[2] | (got_displacement
& 0x00000fff),
5016 splt
->contents
+ h
->plt
.offset
+ 8);
5017 #ifdef FOUR_WORD_PLT
5018 bfd_put_32 (output_bfd
, elf32_arm_plt_entry
[3],
5019 splt
->contents
+ h
->plt
.offset
+ 12);
5022 /* Fill in the entry in the global offset table. */
5023 bfd_put_32 (output_bfd
,
5024 (splt
->output_section
->vma
5025 + splt
->output_offset
),
5026 sgot
->contents
+ got_offset
);
5028 /* Fill in the entry in the .rel.plt section. */
5029 rel
.r_offset
= (sgot
->output_section
->vma
5030 + sgot
->output_offset
5032 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_JUMP_SLOT
);
5035 loc
= srel
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5036 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5038 if (!h
->def_regular
)
5040 /* Mark the symbol as undefined, rather than as defined in
5041 the .plt section. Leave the value alone. */
5042 sym
->st_shndx
= SHN_UNDEF
;
5043 /* If the symbol is weak, we do need to clear the value.
5044 Otherwise, the PLT entry would provide a definition for
5045 the symbol even if the symbol wasn't defined anywhere,
5046 and so the symbol would never be NULL. */
5047 if (!h
->ref_regular_nonweak
)
5052 if (h
->got
.offset
!= (bfd_vma
) -1)
5056 Elf_Internal_Rela rel
;
5059 /* This symbol has an entry in the global offset table. Set it
5061 sgot
= bfd_get_section_by_name (dynobj
, ".got");
5062 srel
= bfd_get_section_by_name (dynobj
, ".rel.got");
5063 BFD_ASSERT (sgot
!= NULL
&& srel
!= NULL
);
5065 rel
.r_offset
= (sgot
->output_section
->vma
5066 + sgot
->output_offset
5067 + (h
->got
.offset
&~ (bfd_vma
) 1));
5069 /* If this is a static link, or it is a -Bsymbolic link and the
5070 symbol is defined locally or was forced to be local because
5071 of a version file, we just want to emit a RELATIVE reloc.
5072 The entry in the global offset table will already have been
5073 initialized in the relocate_section function. */
5075 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5077 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5078 rel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
5082 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5083 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
5084 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
5087 loc
= srel
->contents
+ srel
->reloc_count
++ * sizeof (Elf32_External_Rel
);
5088 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5094 Elf_Internal_Rela rel
;
5097 /* This symbol needs a copy reloc. Set it up. */
5098 BFD_ASSERT (h
->dynindx
!= -1
5099 && (h
->root
.type
== bfd_link_hash_defined
5100 || h
->root
.type
== bfd_link_hash_defweak
));
5102 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
5104 BFD_ASSERT (s
!= NULL
);
5106 rel
.r_offset
= (h
->root
.u
.def
.value
5107 + h
->root
.u
.def
.section
->output_section
->vma
5108 + h
->root
.u
.def
.section
->output_offset
);
5109 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
5110 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
5111 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5114 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5115 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
5116 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
5117 sym
->st_shndx
= SHN_ABS
;
5122 /* Finish up the dynamic sections. */
5125 elf32_arm_finish_dynamic_sections (bfd
* output_bfd
, struct bfd_link_info
* info
)
5131 dynobj
= elf_hash_table (info
)->dynobj
;
5133 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
5134 BFD_ASSERT (elf32_arm_hash_table (info
)->symbian_p
|| sgot
!= NULL
);
5135 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
5137 if (elf_hash_table (info
)->dynamic_sections_created
)
5140 Elf32_External_Dyn
*dyncon
, *dynconend
;
5141 struct elf32_arm_link_hash_table
*htab
;
5143 htab
= elf32_arm_hash_table (info
);
5144 splt
= bfd_get_section_by_name (dynobj
, ".plt");
5145 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
5147 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5148 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5150 for (; dyncon
< dynconend
; dyncon
++)
5152 Elf_Internal_Dyn dyn
;
5156 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5167 goto get_vma_if_bpabi
;
5170 goto get_vma_if_bpabi
;
5173 goto get_vma_if_bpabi
;
5175 name
= ".gnu.version";
5176 goto get_vma_if_bpabi
;
5178 name
= ".gnu.version_d";
5179 goto get_vma_if_bpabi
;
5181 name
= ".gnu.version_r";
5182 goto get_vma_if_bpabi
;
5190 s
= bfd_get_section_by_name (output_bfd
, name
);
5191 BFD_ASSERT (s
!= NULL
);
5192 if (!htab
->symbian_p
)
5193 dyn
.d_un
.d_ptr
= s
->vma
;
5195 /* In the BPABI, tags in the PT_DYNAMIC section point
5196 at the file offset, not the memory address, for the
5197 convenience of the post linker. */
5198 dyn
.d_un
.d_ptr
= s
->filepos
;
5199 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5203 if (htab
->symbian_p
)
5208 s
= bfd_get_section_by_name (output_bfd
, ".rel.plt");
5209 BFD_ASSERT (s
!= NULL
);
5210 dyn
.d_un
.d_val
= s
->size
;
5211 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5215 if (!htab
->symbian_p
)
5217 /* My reading of the SVR4 ABI indicates that the
5218 procedure linkage table relocs (DT_JMPREL) should be
5219 included in the overall relocs (DT_REL). This is
5220 what Solaris does. However, UnixWare can not handle
5221 that case. Therefore, we override the DT_RELSZ entry
5222 here to make it not include the JMPREL relocs. Since
5223 the linker script arranges for .rel.plt to follow all
5224 other relocation sections, we don't have to worry
5225 about changing the DT_REL entry. */
5226 s
= bfd_get_section_by_name (output_bfd
, ".rel.plt");
5228 dyn
.d_un
.d_val
-= s
->size
;
5229 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5237 /* In the BPABI, the DT_REL tag must point at the file
5238 offset, not the VMA, of the first relocation
5239 section. So, we use code similar to that in
5240 elflink.c, but do not check for SHF_ALLOC on the
5241 relcoation section, since relocations sections are
5242 never allocated under the BPABI. The comments above
5243 about Unixware notwithstanding, we include all of the
5244 relocations here. */
5245 if (htab
->symbian_p
)
5248 type
= ((dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
5249 ? SHT_REL
: SHT_RELA
);
5251 for (i
= 1; i
< elf_numsections (output_bfd
); i
++)
5253 Elf_Internal_Shdr
*hdr
5254 = elf_elfsections (output_bfd
)[i
];
5255 if (hdr
->sh_type
== type
)
5257 if (dyn
.d_tag
== DT_RELSZ
5258 || dyn
.d_tag
== DT_RELASZ
)
5259 dyn
.d_un
.d_val
+= hdr
->sh_size
;
5260 else if ((ufile_ptr
) hdr
->sh_offset
5261 <= dyn
.d_un
.d_val
- 1)
5262 dyn
.d_un
.d_val
= hdr
->sh_offset
;
5265 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5269 /* Set the bottom bit of DT_INIT/FINI if the
5270 corresponding function is Thumb. */
5272 name
= info
->init_function
;
5275 name
= info
->fini_function
;
5277 /* If it wasn't set by elf_bfd_final_link
5278 then there is nothing to adjust. */
5279 if (dyn
.d_un
.d_val
!= 0)
5281 struct elf_link_hash_entry
* eh
;
5283 eh
= elf_link_hash_lookup (elf_hash_table (info
), name
,
5284 FALSE
, FALSE
, TRUE
);
5285 if (eh
!= (struct elf_link_hash_entry
*) NULL
5286 && ELF_ST_TYPE (eh
->type
) == STT_ARM_TFUNC
)
5288 dyn
.d_un
.d_val
|= 1;
5289 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5296 /* Fill in the first entry in the procedure linkage table. */
5297 if (splt
->size
> 0 && elf32_arm_hash_table (info
)->plt_header_size
)
5299 bfd_vma got_displacement
;
5301 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5302 got_displacement
= (sgot
->output_section
->vma
5303 + sgot
->output_offset
5304 - splt
->output_section
->vma
5305 - splt
->output_offset
5308 bfd_put_32 (output_bfd
, elf32_arm_plt0_entry
[0], splt
->contents
+ 0);
5309 bfd_put_32 (output_bfd
, elf32_arm_plt0_entry
[1], splt
->contents
+ 4);
5310 bfd_put_32 (output_bfd
, elf32_arm_plt0_entry
[2], splt
->contents
+ 8);
5311 bfd_put_32 (output_bfd
, elf32_arm_plt0_entry
[3], splt
->contents
+ 12);
5312 #ifdef FOUR_WORD_PLT
5313 /* The displacement value goes in the otherwise-unused last word of
5314 the second entry. */
5315 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 28);
5317 bfd_put_32 (output_bfd
, got_displacement
, splt
->contents
+ 16);
5321 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5322 really seem like the right value. */
5323 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
5326 /* Fill in the first three entries in the global offset table. */
5332 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
5334 bfd_put_32 (output_bfd
,
5335 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5337 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
5338 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
5341 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5348 elf32_arm_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
5350 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5351 struct elf32_arm_link_hash_table
*globals
;
5353 i_ehdrp
= elf_elfheader (abfd
);
5355 i_ehdrp
->e_ident
[EI_OSABI
] = ARM_ELF_OS_ABI_VERSION
;
5356 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
5360 globals
= elf32_arm_hash_table (link_info
);
5361 if (globals
->byteswap_code
)
5362 i_ehdrp
->e_flags
|= EF_ARM_BE8
;
5366 static enum elf_reloc_type_class
5367 elf32_arm_reloc_type_class (const Elf_Internal_Rela
*rela
)
5369 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5371 case R_ARM_RELATIVE
:
5372 return reloc_class_relative
;
5373 case R_ARM_JUMP_SLOT
:
5374 return reloc_class_plt
;
5376 return reloc_class_copy
;
5378 return reloc_class_normal
;
5382 /* Set the right machine number for an Arm ELF file. */
5385 elf32_arm_section_flags (flagword
*flags
, const Elf_Internal_Shdr
*hdr
)
5387 if (hdr
->sh_type
== SHT_NOTE
)
5388 *flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_SAME_CONTENTS
;
5394 elf32_arm_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
5396 bfd_arm_update_notes (abfd
, ARM_NOTE_SECTION
);
5399 /* Return TRUE if this is an unwinding table entry. */
5402 is_arm_elf_unwind_section_name (bfd
* abfd ATTRIBUTE_UNUSED
, const char * name
)
5406 len1
= sizeof (ELF_STRING_ARM_unwind
) - 1;
5407 len2
= sizeof (ELF_STRING_ARM_unwind_once
) - 1;
5408 return (strncmp (name
, ELF_STRING_ARM_unwind
, len1
) == 0
5409 || strncmp (name
, ELF_STRING_ARM_unwind_once
, len2
) == 0);
5413 /* Set the type and flags for an ARM section. We do this by
5414 the section name, which is a hack, but ought to work. */
5417 elf32_arm_fake_sections (bfd
* abfd
, Elf_Internal_Shdr
* hdr
, asection
* sec
)
5421 name
= bfd_get_section_name (abfd
, sec
);
5423 if (is_arm_elf_unwind_section_name (abfd
, name
))
5425 hdr
->sh_type
= SHT_ARM_EXIDX
;
5426 hdr
->sh_flags
|= SHF_LINK_ORDER
;
5431 /* Handle an ARM specific section when reading an object file.
5432 This is called when elf.c finds a section with an unknown type. */
5435 elf32_arm_section_from_shdr (bfd
*abfd
,
5436 Elf_Internal_Shdr
* hdr
,
5439 /* There ought to be a place to keep ELF backend specific flags, but
5440 at the moment there isn't one. We just keep track of the
5441 sections by their name, instead. Fortunately, the ABI gives
5442 names for all the ARM specific sections, so we will probably get
5444 switch (hdr
->sh_type
)
5453 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
5459 /* Called for each symbol. Builds a section map based on mapping symbols.
5460 Does not alter any of the symbols. */
5463 elf32_arm_output_symbol_hook (struct bfd_link_info
*info
,
5465 Elf_Internal_Sym
*elfsym
,
5466 asection
*input_sec
,
5467 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
)
5470 elf32_arm_section_map
*map
;
5471 struct elf32_arm_link_hash_table
*globals
;
5473 /* Only do this on final link. */
5474 if (info
->relocatable
)
5477 /* Only build a map if we need to byteswap code. */
5478 globals
= elf32_arm_hash_table (info
);
5479 if (!globals
->byteswap_code
)
5482 /* We only want mapping symbols. */
5483 if (! is_arm_mapping_symbol_name (name
))
5486 mapcount
= ++(elf32_arm_section_data (input_sec
)->mapcount
);
5487 map
= elf32_arm_section_data (input_sec
)->map
;
5488 /* TODO: This may be inefficient, but we probably don't usually have many
5489 mapping symbols per section. */
5490 map
= bfd_realloc (map
, mapcount
* sizeof (elf32_arm_section_map
));
5491 elf32_arm_section_data (input_sec
)->map
= map
;
5493 map
[mapcount
- 1].vma
= elfsym
->st_value
;
5494 map
[mapcount
- 1].type
= name
[1];
5499 /* Allocate target specific section data. */
5502 elf32_arm_new_section_hook (bfd
*abfd
, asection
*sec
)
5504 struct _arm_elf_section_data
*sdata
;
5505 bfd_size_type amt
= sizeof (*sdata
);
5507 sdata
= bfd_zalloc (abfd
, amt
);
5510 sec
->used_by_bfd
= sdata
;
5512 return _bfd_elf_new_section_hook (abfd
, sec
);
5516 /* Used to order a list of mapping symbols by address. */
5519 elf32_arm_compare_mapping (const void * a
, const void * b
)
5521 return ((const elf32_arm_section_map
*) a
)->vma
5522 > ((const elf32_arm_section_map
*) b
)->vma
;
5526 /* Do code byteswapping. Return FALSE afterwards so that the section is
5527 written out as normal. */
5530 elf32_arm_write_section (bfd
*output_bfd ATTRIBUTE_UNUSED
, asection
*sec
,
5534 elf32_arm_section_map
*map
;
5541 mapcount
= elf32_arm_section_data (sec
)->mapcount
;
5542 map
= elf32_arm_section_data (sec
)->map
;
5547 qsort (map
, mapcount
, sizeof (elf32_arm_section_map
),
5548 elf32_arm_compare_mapping
);
5550 offset
= sec
->output_section
->vma
+ sec
->output_offset
;
5551 ptr
= map
[0].vma
- offset
;
5552 for (i
= 0; i
< mapcount
; i
++)
5554 if (i
== mapcount
- 1)
5557 end
= map
[i
+ 1].vma
- offset
;
5559 switch (map
[i
].type
)
5562 /* Byte swap code words. */
5563 while (ptr
+ 3 < end
)
5565 tmp
= contents
[ptr
];
5566 contents
[ptr
] = contents
[ptr
+ 3];
5567 contents
[ptr
+ 3] = tmp
;
5568 tmp
= contents
[ptr
+ 1];
5569 contents
[ptr
+ 1] = contents
[ptr
+ 2];
5570 contents
[ptr
+ 2] = tmp
;
5576 /* Byte swap code halfwords. */
5577 while (ptr
+ 1 < end
)
5579 tmp
= contents
[ptr
];
5580 contents
[ptr
] = contents
[ptr
+ 1];
5581 contents
[ptr
+ 1] = tmp
;
5587 /* Leave data alone. */
5596 /* Display STT_ARM_TFUNC symbols as functions. */
5599 elf32_arm_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5602 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5604 if (ELF_ST_TYPE (elfsym
->internal_elf_sym
.st_info
) == STT_ARM_TFUNC
)
5605 elfsym
->symbol
.flags
|= BSF_FUNCTION
;
5609 /* Mangle thumb function symbols as we read them in. */
5612 elf32_arm_swap_symbol_in (bfd
* abfd
,
5615 Elf_Internal_Sym
*dst
)
5617 bfd_elf32_swap_symbol_in (abfd
, psrc
, pshn
, dst
);
5619 /* New EABI objects mark thumb function symbols by setting the low bit of
5620 the address. Turn these into STT_ARM_TFUNC. */
5621 if (ELF_ST_TYPE (dst
->st_info
) == STT_FUNC
5622 && (dst
->st_value
& 1))
5624 dst
->st_info
= ELF_ST_INFO (ELF_ST_BIND (dst
->st_info
), STT_ARM_TFUNC
);
5625 dst
->st_value
&= ~(bfd_vma
) 1;
5630 /* Mangle thumb function symbols as we write them out. */
5633 elf32_arm_swap_symbol_out (bfd
*abfd
,
5634 const Elf_Internal_Sym
*src
,
5638 Elf_Internal_Sym newsym
;
5640 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
5641 of the address set, as per the new EABI. We do this unconditionally
5642 because objcopy does not set the elf header flags until after
5643 it writes out the symbol table. */
5644 if (ELF_ST_TYPE (src
->st_info
) == STT_ARM_TFUNC
)
5647 newsym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (src
->st_info
), STT_FUNC
);
5648 newsym
.st_value
|= 1;
5652 bfd_elf32_swap_symbol_out (abfd
, src
, cdst
, shndx
);
5655 /* We use this to override swap_symbol_in and swap_symbol_out. */
5656 const struct elf_size_info elf32_arm_size_info
= {
5657 sizeof (Elf32_External_Ehdr
),
5658 sizeof (Elf32_External_Phdr
),
5659 sizeof (Elf32_External_Shdr
),
5660 sizeof (Elf32_External_Rel
),
5661 sizeof (Elf32_External_Rela
),
5662 sizeof (Elf32_External_Sym
),
5663 sizeof (Elf32_External_Dyn
),
5664 sizeof (Elf_External_Note
),
5668 ELFCLASS32
, EV_CURRENT
,
5669 bfd_elf32_write_out_phdrs
,
5670 bfd_elf32_write_shdrs_and_ehdr
,
5671 bfd_elf32_write_relocs
,
5672 elf32_arm_swap_symbol_in
,
5673 elf32_arm_swap_symbol_out
,
5674 bfd_elf32_slurp_reloc_table
,
5675 bfd_elf32_slurp_symbol_table
,
5676 bfd_elf32_swap_dyn_in
,
5677 bfd_elf32_swap_dyn_out
,
5678 bfd_elf32_swap_reloc_in
,
5679 bfd_elf32_swap_reloc_out
,
5680 bfd_elf32_swap_reloca_in
,
5681 bfd_elf32_swap_reloca_out
5684 #define ELF_ARCH bfd_arch_arm
5685 #define ELF_MACHINE_CODE EM_ARM
5686 #ifdef __QNXTARGET__
5687 #define ELF_MAXPAGESIZE 0x1000
5689 #define ELF_MAXPAGESIZE 0x8000
5692 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5693 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
5694 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5695 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5696 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
5697 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
5698 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
5699 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
5700 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
5702 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5703 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5704 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5705 #define elf_backend_check_relocs elf32_arm_check_relocs
5706 #define elf_backend_relocate_section elf32_arm_relocate_section
5707 #define elf_backend_write_section elf32_arm_write_section
5708 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5709 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
5710 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5711 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
5712 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
5713 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
5714 #define elf_backend_post_process_headers elf32_arm_post_process_headers
5715 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
5716 #define elf_backend_object_p elf32_arm_object_p
5717 #define elf_backend_section_flags elf32_arm_section_flags
5718 #define elf_backend_fake_sections elf32_arm_fake_sections
5719 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
5720 #define elf_backend_final_write_processing elf32_arm_final_write_processing
5721 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
5722 #define elf_backend_symbol_processing elf32_arm_symbol_processing
5723 #define elf_backend_size_info elf32_arm_size_info
5725 #define elf_backend_can_refcount 1
5726 #define elf_backend_can_gc_sections 1
5727 #define elf_backend_plt_readonly 1
5728 #define elf_backend_want_got_plt 1
5729 #define elf_backend_want_plt_sym 0
5731 #define elf_backend_rela_normal 1
5734 #define elf_backend_got_header_size 12
5736 #include "elf32-target.h"
5738 /* Symbian OS Targets */
5740 #undef TARGET_LITTLE_SYM
5741 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5742 #undef TARGET_LITTLE_NAME
5743 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5744 #undef TARGET_BIG_SYM
5745 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5746 #undef TARGET_BIG_NAME
5747 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
5749 /* Like elf32_arm_link_hash_table_create -- but overrides
5750 appropriately for Symbian OS. */
5751 static struct bfd_link_hash_table
*
5752 elf32_arm_symbian_link_hash_table_create (bfd
*abfd
)
5754 struct bfd_link_hash_table
*ret
;
5756 ret
= elf32_arm_link_hash_table_create (abfd
);
5759 struct elf32_arm_link_hash_table
*htab
5760 = (struct elf32_arm_link_hash_table
*)ret
;
5761 /* There is no PLT header for Symbian OS. */
5762 htab
->plt_header_size
= 0;
5763 /* The PLT entries are each three instructions. */
5764 htab
->plt_entry_size
= 4 * NUM_ELEM (elf32_arm_symbian_plt_entry
);
5765 htab
->symbian_p
= 1;
5770 /* In a BPABI executable, the dynamic linking sections do not go in
5771 the loadable read-only segment. The post-linker may wish to refer
5772 to these sections, but they are not part of the final program
5774 static struct bfd_elf_special_section
const
5775 elf32_arm_symbian_special_sections
[]=
5777 { ".dynamic", 8, 0, SHT_DYNAMIC
, 0 },
5778 { ".dynstr", 7, 0, SHT_STRTAB
, 0 },
5779 { ".dynsym", 7, 0, SHT_DYNSYM
, 0 },
5780 { ".got", 4, 0, SHT_PROGBITS
, 0 },
5781 { ".hash", 5, 0, SHT_HASH
, 0 },
5782 { NULL
, 0, 0, 0, 0 }
5786 elf32_arm_symbian_begin_write_processing (bfd
*abfd
,
5787 struct bfd_link_info
*link_info
5790 /* BPABI objects are never loaded directly by an OS kernel; they are
5791 processed by a postlinker first, into an OS-specific format. If
5792 the D_PAGED bit is set on the file, BFD will align segments on
5793 page boundaries, so that an OS can directly map the file. With
5794 BPABI objects, that just results in wasted space. In addition,
5795 because we clear the D_PAGED bit, map_sections_to_segments will
5796 recognize that the program headers should not be mapped into any
5797 loadable segment. */
5798 abfd
->flags
&= ~D_PAGED
;
5802 elf32_arm_symbian_modify_segment_map (bfd
*abfd
,
5803 struct bfd_link_info
*info
5806 struct elf_segment_map
*m
;
5809 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5810 segment. However, because the .dynamic section is not marked
5811 with SEC_LOAD, the generic ELF code will not create such a
5813 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
5816 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
5817 m
->next
= elf_tdata (abfd
)->segment_map
;
5818 elf_tdata (abfd
)->segment_map
= m
;
5825 #define elf32_bed elf32_arm_symbian_bed
5827 /* The dynamic sections are not allocated on SymbianOS; the postlinker
5828 will process them and then discard them. */
5829 #undef ELF_DYNAMIC_SEC_FLAGS
5830 #define ELF_DYNAMIC_SEC_FLAGS \
5831 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
5833 #undef bfd_elf32_bfd_link_hash_table_create
5834 #define bfd_elf32_bfd_link_hash_table_create \
5835 elf32_arm_symbian_link_hash_table_create
5837 #undef elf_backend_special_sections
5838 #define elf_backend_special_sections elf32_arm_symbian_special_sections
5840 #undef elf_backend_begin_write_processing
5841 #define elf_backend_begin_write_processing \
5842 elf32_arm_symbian_begin_write_processing
5844 #undef elf_backend_modify_segment_map
5845 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
5847 /* There is no .got section for BPABI objects, and hence no header. */
5848 #undef elf_backend_got_header_size
5849 #define elf_backend_got_header_size 0
5851 /* Similarly, there is no .got.plt section. */
5852 #undef elf_backend_want_got_plt
5853 #define elf_backend_want_got_plt 0
5855 #include "elf32-target.h"