]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blame - bfd/elf32-arm.h
projects / thirdparty / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
* configure.host: Use ${CC} instead of gcc for finding compiler
[thirdparty/binutils-gdb.git] / bfd / elf32-arm.h
CommitLineData
252b5132
RH		 1/* 32-bit ELF support for ARM
2 Copyright 1998, 1999 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20
21typedef unsigned long int insn32;
22typedef unsigned short int insn16;
23
24static boolean elf32_arm_set_private_flags
25 PARAMS ((bfd *, flagword));
26static boolean elf32_arm_copy_private_bfd_data
27 PARAMS ((bfd *, bfd *));
28static boolean elf32_arm_merge_private_bfd_data
29 PARAMS ((bfd *, bfd *));
30static boolean elf32_arm_print_private_bfd_data
31 PARAMS ((bfd *, PTR));
f21f3fe0 32static int elf32_arm_get_symbol_type
252b5132
RH		 33 PARAMS (( Elf_Internal_Sym *, int));
34static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
35 PARAMS ((bfd *));
36static bfd_reloc_status_type elf32_arm_final_link_relocate
780a67af
NC		 37 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
38 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
39 const char *, unsigned char, struct elf_link_hash_entry *));
252b5132
RH		 40
41static insn32 insert_thumb_branch
42 PARAMS ((insn32, int));
43static struct elf_link_hash_entry *find_thumb_glue
44 PARAMS ((struct bfd_link_info *, CONST char *, bfd *));
45static struct elf_link_hash_entry *find_arm_glue
46 PARAMS ((struct bfd_link_info *, CONST char *, bfd *));
47static void record_arm_to_thumb_glue
48 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
49static void record_thumb_to_arm_glue
50 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
ba96a88f
NC		 51static void elf32_arm_post_process_headers
52 PARAMS ((bfd *, struct bfd_link_info *));
bcbdc74c
NC		 53static int elf32_arm_to_thumb_stub
54 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
55 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
56static int elf32_thumb_to_arm_stub
57 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
58 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
252b5132
RH		 59
60/* The linker script knows the section names for placement.
61 The entry_names are used to do simple name mangling on the stubs.
62 Given a function name, and its type, the stub can be found. The
63 name can be changed. The only requirement is the %s be present.
64 */
65
66#define INTERWORK_FLAG( abfd ) (elf_elfheader (abfd)->e_flags & EF_INTERWORK)
67
68#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
69#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
70
71#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
72#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
73
74/* The name of the dynamic interpreter. This is put in the .interp
75 section. */
76#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
77
78/* The size in bytes of an entry in the procedure linkage table. */
79
80#define PLT_ENTRY_SIZE 16
81
82/* The first entry in a procedure linkage table looks like
83 this. It is set up so that any shared library function that is
84 called before the relocation has been set up calles the dynamic
85 linker first */
86
87static const bfd_byte elf32_arm_plt0_entry [PLT_ENTRY_SIZE] =
88{
89 0x04, 0xe0, 0x2d, 0xe5, /* str lr, [sp, #-4]! */
90 0x10, 0xe0, 0x9f, 0xe5, /* ldr lr, [pc, #16] */
91 0x0e, 0xe0, 0x8f, 0xe0, /* adr lr, pc, lr */
92 0x08, 0xf0, 0xbe, 0xe5 /* ldr pc, [lr, #-4] */
93};
94
95/* Subsequent entries in a procedure linkage table look like
96 this. */
97
98static const bfd_byte elf32_arm_plt_entry [PLT_ENTRY_SIZE] =
99{
100 0x04, 0xc0, 0x9f, 0xe5, /* ldr ip, [pc, #4] */
101 0x0c, 0xc0, 0x8f, 0xe0, /* add ip, pc, ip */
102 0x00, 0xf0, 0x9c, 0xe5, /* ldr pc, [ip] */
103 0x00, 0x00, 0x00, 0x00 /* offset to symbol in got */
104};
105
106
107/* The ARM linker needs to keep track of the number of relocs that it
108 decides to copy in check_relocs for each symbol. This is so that
109 it can discard PC relative relocs if it doesn't need them when
110 linking with -Bsymbolic. We store the information in a field
111 extending the regular ELF linker hash table. */
112
113/* This structure keeps track of the number of PC relative relocs we
114 have copied for a given symbol. */
115
116struct elf32_arm_pcrel_relocs_copied
117{
118 /* Next section. */
119 struct elf32_arm_pcrel_relocs_copied * next;
120 /* A section in dynobj. */
121 asection * section;
122 /* Number of relocs copied in this section. */
123 bfd_size_type count;
124};
125
ba96a88f 126/* Arm ELF linker hash entry. */
252b5132
RH		 127
128struct elf32_arm_link_hash_entry
129{
130 struct elf_link_hash_entry root;
131
132 /* Number of PC relative relocs copied for this symbol. */
133 struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied;
134};
135
136/* Declare this now that the above structures are defined. */
137
138static boolean elf32_arm_discard_copies
139 PARAMS ((struct elf32_arm_link_hash_entry *, PTR));
140
141/* Traverse an arm ELF linker hash table. */
142
143#define elf32_arm_link_hash_traverse(table, func, info) \
144 (elf_link_hash_traverse \
145 (&(table)->root, \
146 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
147 (info)))
148
149/* Get the ARM elf linker hash table from a link_info structure. */
150#define elf32_arm_hash_table(info) \
151 ((struct elf32_arm_link_hash_table *) ((info)->hash))
152
153/* ARM ELF linker hash table */
154struct elf32_arm_link_hash_table
155 {
156 /* The main hash table. */
157 struct elf_link_hash_table root;
158
159 /* The size in bytes of the section containg the Thumb-to-ARM glue. */
160 long int thumb_glue_size;
161
162 /* The size in bytes of the section containg the ARM-to-Thumb glue. */
163 long int arm_glue_size;
164
165 /* An arbitary input BFD chosen to hold the glue sections. */
166 bfd * bfd_of_glue_owner;
ba96a88f
NC		 167
168 /* A boolean indicating whether knowledge of the ARM's pipeline
169 length should be applied by the linker. */
170 int no_pipeline_knowledge;
252b5132
RH		 171 };
172
173
780a67af
NC		 174/* Create an entry in an ARM ELF linker hash table. */
175
176static struct bfd_hash_entry *
177elf32_arm_link_hash_newfunc (entry, table, string)
178 struct bfd_hash_entry * entry;
179 struct bfd_hash_table * table;
180 const char * string;
181{
182 struct elf32_arm_link_hash_entry * ret =
183 (struct elf32_arm_link_hash_entry *) entry;
184
185 /* Allocate the structure if it has not already been allocated by a
186 subclass. */
187 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
188 ret = ((struct elf32_arm_link_hash_entry *)
189 bfd_hash_allocate (table,
190 sizeof (struct elf32_arm_link_hash_entry)));
191 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
192 return (struct bfd_hash_entry *) ret;
193
194 /* Call the allocation method of the superclass. */
195 ret = ((struct elf32_arm_link_hash_entry *)
196 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
197 table, string));
198 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
199 ret->pcrel_relocs_copied = NULL;
200
201 return (struct bfd_hash_entry *) ret;
202}
203
252b5132
RH		 204/* Create an ARM elf linker hash table */
205
206static struct bfd_link_hash_table *
207elf32_arm_link_hash_table_create (abfd)
208 bfd *abfd;
209{
210 struct elf32_arm_link_hash_table *ret;
211
212 ret = ((struct elf32_arm_link_hash_table *)
213 bfd_alloc (abfd, sizeof (struct elf32_arm_link_hash_table)));
214 if (ret == (struct elf32_arm_link_hash_table *) NULL)
215 return NULL;
216
217 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
780a67af 218 elf32_arm_link_hash_newfunc))
252b5132
RH		 219 {
220 bfd_release (abfd, ret);
221 return NULL;
222 }
223
224 ret->thumb_glue_size = 0;
225 ret->arm_glue_size = 0;
226 ret->bfd_of_glue_owner = NULL;
ba96a88f 227 ret->no_pipeline_knowledge = 0;
252b5132
RH		 228
229 return &ret->root.root;
230}
231
232static struct elf_link_hash_entry *
233find_thumb_glue (link_info, name, input_bfd)
234 struct bfd_link_info *link_info;
235 CONST char *name;
236 bfd *input_bfd;
237{
238 char *tmp_name;
239 struct elf_link_hash_entry *hash;
240 struct elf32_arm_link_hash_table *hash_table;
241
242 /* We need a pointer to the armelf specific hash table. */
243 hash_table = elf32_arm_hash_table (link_info);
244
245
246 tmp_name = ((char *)
247 bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1));
248
249 BFD_ASSERT (tmp_name);
250
251 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
252
253 hash = elf_link_hash_lookup
254 (&(hash_table)->root, tmp_name, false, false, true);
255
256 if (hash == NULL)
257 /* xgettext:c-format */
258 _bfd_error_handler (_ ("%s: unable to find THUMB glue '%s' for `%s'"),
259 bfd_get_filename (input_bfd), tmp_name, name);
260
261 free (tmp_name);
262
263 return hash;
264}
265
266static struct elf_link_hash_entry *
267find_arm_glue (link_info, name, input_bfd)
268 struct bfd_link_info *link_info;
269 CONST char *name;
270 bfd *input_bfd;
271{
272 char *tmp_name;
273 struct elf_link_hash_entry *myh;
274 struct elf32_arm_link_hash_table *hash_table;
275
276 /* We need a pointer to the elfarm specific hash table. */
277 hash_table = elf32_arm_hash_table (link_info);
278
279 tmp_name = ((char *)
280 bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
281
282 BFD_ASSERT (tmp_name);
283
284 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
285
286 myh = elf_link_hash_lookup
287 (&(hash_table)->root, tmp_name, false, false, true);
288
289 if (myh == NULL)
290 /* xgettext:c-format */
291 _bfd_error_handler (_ ("%s: unable to find ARM glue '%s' for `%s'"),
292 bfd_get_filename (input_bfd), tmp_name, name);
293
294 free (tmp_name);
295
296 return myh;
297}
298
299/*
300 ARM->Thumb glue:
301
302 .arm
303 __func_from_arm:
304 ldr r12, __func_addr
305 bx r12
306 __func_addr:
307 .word func @ behave as if you saw a ARM_32 reloc
308 */
309
310#define ARM2THUMB_GLUE_SIZE 12
311static const insn32 a2t1_ldr_insn = 0xe59fc000;
312static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
313static const insn32 a2t3_func_addr_insn = 0x00000001;
314
315/*
316 Thumb->ARM: Thumb->(non-interworking aware) ARM
317
318 .thumb .thumb
319 .align 2 .align 2
320 __func_from_thumb: __func_from_thumb:
321 bx pc push {r6, lr}
322 nop ldr r6, __func_addr
323 .arm mov lr, pc
324 __func_change_to_arm: bx r6
325 b func .arm
326 __func_back_to_thumb:
327 ldmia r13! {r6, lr}
328 bx lr
329 __func_addr:
f21f3fe0 330 .word func
252b5132
RH		 331 */
332
333#define THUMB2ARM_GLUE_SIZE 8
334static const insn16 t2a1_bx_pc_insn = 0x4778;
335static const insn16 t2a2_noop_insn = 0x46c0;
336static const insn32 t2a3_b_insn = 0xea000000;
337
338static const insn16 t2a1_push_insn = 0xb540;
339static const insn16 t2a2_ldr_insn = 0x4e03;
340static const insn16 t2a3_mov_insn = 0x46fe;
341static const insn16 t2a4_bx_insn = 0x4730;
342static const insn32 t2a5_pop_insn = 0xe8bd4040;
343static const insn32 t2a6_bx_insn = 0xe12fff1e;
344
345boolean
346bfd_elf32_arm_allocate_interworking_sections (info)
347 struct bfd_link_info * info;
348{
349 asection * s;
350 bfd_byte * foo;
351 struct elf32_arm_link_hash_table * globals;
352
353 globals = elf32_arm_hash_table (info);
354
355 BFD_ASSERT (globals != NULL);
356
357 if (globals->arm_glue_size != 0)
358 {
359 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
360
361 s = bfd_get_section_by_name
362 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
363
364 BFD_ASSERT (s != NULL);
365
366 foo = (bfd_byte *) bfd_alloc
367 (globals->bfd_of_glue_owner, globals->arm_glue_size);
368
369 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
370 s->contents = foo;
371 }
372
373 if (globals->thumb_glue_size != 0)
374 {
375 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
376
377 s = bfd_get_section_by_name
378 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
379
380 BFD_ASSERT (s != NULL);
381
382 foo = (bfd_byte *) bfd_alloc
383 (globals->bfd_of_glue_owner, globals->thumb_glue_size);
384
385 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
386 s->contents = foo;
387 }
388
389 return true;
390}
391
392static void
393record_arm_to_thumb_glue (link_info, h)
394 struct bfd_link_info * link_info;
395 struct elf_link_hash_entry * h;
396{
397 const char * name = h->root.root.string;
398 register asection * s;
399 char * tmp_name;
400 struct elf_link_hash_entry * myh;
401 struct elf32_arm_link_hash_table * globals;
402
403 globals = elf32_arm_hash_table (link_info);
404
405 BFD_ASSERT (globals != NULL);
406 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
407
408 s = bfd_get_section_by_name
409 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
410
411
412 BFD_ASSERT (s != NULL);
413
414 tmp_name = ((char *)
415 bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
416
417 BFD_ASSERT (tmp_name);
418
419 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
420
421 myh = elf_link_hash_lookup
422 (&(globals)->root, tmp_name, false, false, true);
423
424 if (myh != NULL)
425 {
426 free (tmp_name);
427 return; /* we've already seen this guy */
428 }
429
430 /* The only trick here is using hash_table->arm_glue_size as the value. Even
431 though the section isn't allocated yet, this is where we will be putting
432 it. */
433
434 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, tmp_name,
435 BSF_GLOBAL,
436 s, globals->arm_glue_size + 1,
437 NULL, true, false,
438 (struct bfd_link_hash_entry **) &myh);
439
440 free (tmp_name);
441
442 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
443
444 return;
445}
446
447static void
448record_thumb_to_arm_glue (link_info, h)
449 struct bfd_link_info *link_info;
450 struct elf_link_hash_entry *h;
451{
452 const char *name = h->root.root.string;
453 register asection *s;
454 char *tmp_name;
455 struct elf_link_hash_entry *myh;
456 struct elf32_arm_link_hash_table *hash_table;
457 char bind;
458
459 hash_table = elf32_arm_hash_table (link_info);
460
461 BFD_ASSERT (hash_table != NULL);
462 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
463
464 s = bfd_get_section_by_name
465 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
466
467 BFD_ASSERT (s != NULL);
468
469 tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
470
471 BFD_ASSERT (tmp_name);
472
473 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
474
475 myh = elf_link_hash_lookup
476 (&(hash_table)->root, tmp_name, false, false, true);
477
478 if (myh != NULL)
479 {
480 free (tmp_name);
481 return; /* we've already seen this guy */
482 }
483
484 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name,
485 BSF_GLOBAL, s, hash_table->thumb_glue_size + 1,
486 NULL, true, false,
487 (struct bfd_link_hash_entry **) &myh);
488
489 /* If we mark it 'thumb', the disassembler will do a better job. */
490 bind = ELF_ST_BIND (myh->type);
491 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
492
493 free (tmp_name);
494
495 /* Allocate another symbol to mark where we switch to arm mode. */
496
497#define CHANGE_TO_ARM "__%s_change_to_arm"
498#define BACK_FROM_ARM "__%s_back_from_arm"
499
500 tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1);
501
502 BFD_ASSERT (tmp_name);
503
504 sprintf (tmp_name, CHANGE_TO_ARM, name);
505
506 myh = NULL;
507
508 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name,
509 BSF_LOCAL, s, hash_table->thumb_glue_size + 4,
510 NULL, true, false,
511 (struct bfd_link_hash_entry **) &myh);
512
513 free (tmp_name);
514
515 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
516
517 return;
518}
519
520/* Select a BFD to be used to hold the sections used by the glue code.
521 This function is called from the linker scripts in ld/emultempl/
522 {armelf/pe}.em */
523boolean
524bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
525 bfd *abfd;
526 struct bfd_link_info *info;
527{
528 struct elf32_arm_link_hash_table *globals;
529 flagword flags;
530 asection *sec;
531
532 /* If we are only performing a partial link do not bother
533 getting a bfd to hold the glue. */
534 if (info->relocateable)
535 return true;
536
537 globals = elf32_arm_hash_table (info);
538
539 BFD_ASSERT (globals != NULL);
540
541 if (globals->bfd_of_glue_owner != NULL)
542 return true;
543
544 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
545
546 if (sec == NULL)
547 {
548 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
549
550 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
551
552 if (sec == NULL
553 || !bfd_set_section_flags (abfd, sec, flags)
554 || !bfd_set_section_alignment (abfd, sec, 2))
555 return false;
556 }
557
558 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
559
560 if (sec == NULL)
561 {
562 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
563
564 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
565
566 if (sec == NULL
567 || !bfd_set_section_flags (abfd, sec, flags)
568 || !bfd_set_section_alignment (abfd, sec, 2))
569 return false;
570 }
571
572 /* Save the bfd for later use. */
573 globals->bfd_of_glue_owner = abfd;
574
575 return true;
576}
577
578boolean
ba96a88f 579bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
252b5132
RH		 580 bfd *abfd;
581 struct bfd_link_info *link_info;
ba96a88f 582 int no_pipeline_knowledge;
252b5132
RH		 583{
584 Elf_Internal_Shdr *symtab_hdr;
585 Elf_Internal_Rela *free_relocs = NULL;
586 Elf_Internal_Rela *irel, *irelend;
587 bfd_byte *contents = NULL;
588 bfd_byte *free_contents = NULL;
589 Elf32_External_Sym *extsyms = NULL;
590 Elf32_External_Sym *free_extsyms = NULL;
591
592 asection *sec;
593 struct elf32_arm_link_hash_table *globals;
594
595 /* If we are only performing a partial link do not bother
596 to construct any glue. */
597 if (link_info->relocateable)
598 return true;
599
600 /* Here we have a bfd that is to be included on the link. We have a hook
601 to do reloc rummaging, before section sizes are nailed down. */
602
603 globals = elf32_arm_hash_table (link_info);
604
605 BFD_ASSERT (globals != NULL);
606 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
607
ba96a88f 608 globals->no_pipeline_knowledge = no_pipeline_knowledge;
f21f3fe0 609
252b5132
RH		 610 /* Rummage around all the relocs and map the glue vectors. */
611 sec = abfd->sections;
612
613 if (sec == NULL)
614 return true;
615
616 for (; sec != NULL; sec = sec->next)
617 {
618 if (sec->reloc_count == 0)
619 continue;
620
621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
622 /* Load the relocs. */
623
624 irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL,
625 (Elf_Internal_Rela *) NULL, false));
626
627 BFD_ASSERT (irel != 0);
628
629 irelend = irel + sec->reloc_count;
630 for (; irel < irelend; irel++)
631 {
632 long r_type;
633 unsigned long r_index;
252b5132
RH		 634
635 struct elf_link_hash_entry *h;
636
637 r_type = ELF32_R_TYPE (irel->r_info);
638 r_index = ELF32_R_SYM (irel->r_info);
639
640 /* These are the only relocation types we care about */
ba96a88f 641 if ( r_type != R_ARM_PC24
252b5132
RH		 642 && r_type != R_ARM_THM_PC22)
643 continue;
644
645 /* Get the section contents if we haven't done so already. */
646 if (contents == NULL)
647 {
648 /* Get cached copy if it exists. */
649 if (elf_section_data (sec)->this_hdr.contents != NULL)
650 contents = elf_section_data (sec)->this_hdr.contents;
651 else
652 {
653 /* Go get them off disk. */
654 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
655 if (contents == NULL)
656 goto error_return;
657 free_contents = contents;
658
659 if (!bfd_get_section_contents (abfd, sec, contents,
660 (file_ptr) 0, sec->_raw_size))
661 goto error_return;
662 }
663 }
664
665 /* Read this BFD's symbols if we haven't done so already. */
666 if (extsyms == NULL)
667 {
668 /* Get cached copy if it exists. */
669 if (symtab_hdr->contents != NULL)
670 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
671 else
672 {
673 /* Go get them off disk. */
674 extsyms = ((Elf32_External_Sym *)
675 bfd_malloc (symtab_hdr->sh_size));
676 if (extsyms == NULL)
677 goto error_return;
678 free_extsyms = extsyms;
679 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
680 || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
681 != symtab_hdr->sh_size))
682 goto error_return;
683 }
684 }
685
686 /* If the relocation is not against a symbol it cannot concern us. */
687
688 h = NULL;
689
690 /* We don't care about local symbols */
691 if (r_index < symtab_hdr->sh_info)
692 continue;
693
694 /* This is an external symbol */
695 r_index -= symtab_hdr->sh_info;
696 h = (struct elf_link_hash_entry *)
697 elf_sym_hashes (abfd)[r_index];
698
699 /* If the relocation is against a static symbol it must be within
700 the current section and so cannot be a cross ARM/Thumb relocation. */
701 if (h == NULL)
702 continue;
703
704 switch (r_type)
705 {
706 case R_ARM_PC24:
707 /* This one is a call from arm code. We need to look up
708 the target of the call. If it is a thumb target, we
709 insert glue. */
710
711 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
712 record_arm_to_thumb_glue (link_info, h);
713 break;
714
715 case R_ARM_THM_PC22:
f21f3fe0 716 /* This one is a call from thumb code. We look
252b5132 717 up the target of the call. If it is not a thumb
bcbdc74c 718 target, we insert glue. */
252b5132
RH		 719
720 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
721 record_thumb_to_arm_glue (link_info, h);
722 break;
723
724 default:
725 break;
726 }
727 }
728 }
729
730 return true;
731error_return:
732 if (free_relocs != NULL)
733 free (free_relocs);
734 if (free_contents != NULL)
735 free (free_contents);
736 if (free_extsyms != NULL)
737 free (free_extsyms);
738 return false;
739
740}
741
742/* The thumb form of a long branch is a bit finicky, because the offset
743 encoding is split over two fields, each in it's own instruction. They
f21f3fe0 744 can occur in any order. So given a thumb form of long branch, and an
252b5132 745 offset, insert the offset into the thumb branch and return finished
f21f3fe0 746 instruction.
252b5132 747
f21f3fe0 748 It takes two thumb instructions to encode the target address. Each has
252b5132 749 11 bits to invest. The upper 11 bits are stored in one (identifed by
f21f3fe0
UD		 750 H-0.. see below), the lower 11 bits are stored in the other (identified
751 by H-1).
252b5132 752
f21f3fe0 753 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH		 754 there you have it.
755
756 Op: 1111 = F,
757 H-0, upper address-0 = 000
758 Op: 1111 = F,
759 H-1, lower address-0 = 800
760
f21f3fe0 761 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH		 762 the lower one first. It probably doesn't matter. krk@cygnus.com
763
764 XXX: Actually the order does matter. The second instruction (H-1)
765 moves the computed address into the PC, so it must be the second one
766 in the sequence. The problem, however is that whilst little endian code
767 stores the instructions in HI then LOW order, big endian code does the
768 reverse. nickc@cygnus.com */
769
770#define LOW_HI_ORDER 0xF800F000
771#define HI_LOW_ORDER 0xF000F800
772
773static insn32
774insert_thumb_branch (br_insn, rel_off)
775 insn32 br_insn;
776 int rel_off;
777{
778 unsigned int low_bits;
779 unsigned int high_bits;
780
781
782 BFD_ASSERT ((rel_off & 1) != 1);
783
784 rel_off >>= 1; /* half word aligned address */
785 low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */
786 high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */
787
788 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
789 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
790 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
791 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
792 else
793 abort (); /* error - not a valid branch instruction form */
794
795 /* FIXME: abort is probably not the right call. krk@cygnus.com */
796
797 return br_insn;
798}
799
800/* Thumb code calling an ARM function */
801static int
802elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
803 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 804 struct bfd_link_info * info;
805 const char * name;
806 bfd * input_bfd;
807 bfd * output_bfd;
808 asection * input_section;
809 bfd_byte * hit_data;
810 asection * sym_sec;
811 bfd_vma offset;
812 bfd_signed_vma addend;
813 bfd_vma val;
252b5132 814{
bcbdc74c 815 asection * s = 0;
252b5132
RH		 816 long int my_offset;
817 unsigned long int tmp;
818 long int ret_offset;
bcbdc74c
NC		 819 struct elf_link_hash_entry * myh;
820 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 821
822 myh = find_thumb_glue (info, name, input_bfd);
823 if (myh == NULL)
824 return false;
825
826 globals = elf32_arm_hash_table (info);
827
828 BFD_ASSERT (globals != NULL);
829 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
830
831 my_offset = myh->root.u.def.value;
832
833 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
834 THUMB2ARM_GLUE_SECTION_NAME);
835
836 BFD_ASSERT (s != NULL);
837 BFD_ASSERT (s->contents != NULL);
838 BFD_ASSERT (s->output_section != NULL);
839
840 if ((my_offset & 0x01) == 0x01)
841 {
842 if (sym_sec != NULL
843 && sym_sec->owner != NULL
844 && !INTERWORK_FLAG (sym_sec->owner))
845 {
846 _bfd_error_handler
847 (_ ("%s(%s): warning: interworking not enabled."),
848 bfd_get_filename (sym_sec->owner), name);
849 _bfd_error_handler
850 (_ (" first occurrence: %s: thumb call to arm"),
851 bfd_get_filename (input_bfd));
852
853 return false;
854 }
855
856 --my_offset;
857 myh->root.u.def.value = my_offset;
858
859 bfd_put_16 (output_bfd, t2a1_bx_pc_insn,
860 s->contents + my_offset);
861
862 bfd_put_16 (output_bfd, t2a2_noop_insn,
863 s->contents + my_offset + 2);
864
865 ret_offset =
866 ((bfd_signed_vma) val) /* Address of destination of the stub */
867 - ((bfd_signed_vma)
868 (s->output_offset /* Offset from the start of the current section to the start of the stubs. */
869 + my_offset /* Offset of the start of this stub from the start of the stubs. */
870 + s->output_section->vma) /* Address of the start of the current section. */
871 + 4 /* The branch instruction is 4 bytes into the stub. */
872 + 8); /* ARM branches work from the pc of the instruction + 8. */
873
874 bfd_put_32 (output_bfd,
875 t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
876 s->contents + my_offset + 4);
877 }
878
879 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
880
881 /* Now go back and fix up the original BL insn to point
882 to here. */
883 ret_offset =
884 s->output_offset
885 + my_offset
886 - (input_section->output_offset
887 + offset + addend)
888 - 4;
889
890 tmp = bfd_get_32 (input_bfd, hit_data
891 - input_section->vma);
892
893 bfd_put_32 (output_bfd,
894 insert_thumb_branch (tmp, ret_offset),
895 hit_data - input_section->vma);
896
897 return true;
898}
899
900/* Arm code calling a Thumb function */
901static int
902elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
903 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 904 struct bfd_link_info * info;
905 const char * name;
906 bfd * input_bfd;
907 bfd * output_bfd;
908 asection * input_section;
909 bfd_byte * hit_data;
910 asection * sym_sec;
911 bfd_vma offset;
912 bfd_signed_vma addend;
913 bfd_vma val;
252b5132
RH		 914{
915 unsigned long int tmp;
916 long int my_offset;
bcbdc74c 917 asection * s;
252b5132 918 long int ret_offset;
bcbdc74c
NC		 919 struct elf_link_hash_entry * myh;
920 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 921
922 myh = find_arm_glue (info, name, input_bfd);
923 if (myh == NULL)
924 return false;
925
926 globals = elf32_arm_hash_table (info);
927
928 BFD_ASSERT (globals != NULL);
929 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
930
931 my_offset = myh->root.u.def.value;
932 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
933 ARM2THUMB_GLUE_SECTION_NAME);
934 BFD_ASSERT (s != NULL);
935 BFD_ASSERT (s->contents != NULL);
936 BFD_ASSERT (s->output_section != NULL);
937
938 if ((my_offset & 0x01) == 0x01)
939 {
940 if (sym_sec != NULL
941 && sym_sec->owner != NULL
942 && !INTERWORK_FLAG (sym_sec->owner))
943 {
944 _bfd_error_handler
945 (_ ("%s(%s): warning: interworking not enabled."),
946 bfd_get_filename (sym_sec->owner), name);
947 _bfd_error_handler
948 (_ (" first occurrence: %s: arm call to thumb"),
949 bfd_get_filename (input_bfd));
950 }
951 --my_offset;
952 myh->root.u.def.value = my_offset;
953
954 bfd_put_32 (output_bfd, a2t1_ldr_insn,
955 s->contents + my_offset);
956
957 bfd_put_32 (output_bfd, a2t2_bx_r12_insn,
958 s->contents + my_offset + 4);
959
960 /* It's a thumb address. Add the low order bit. */
961 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
962 s->contents + my_offset + 8);
963 }
964
965 BFD_ASSERT (my_offset <= globals->arm_glue_size);
966
967 tmp = bfd_get_32 (input_bfd, hit_data);
968 tmp = tmp & 0xFF000000;
969
970 /* Somehow these are both 4 too far, so subtract 8. */
971 ret_offset = s->output_offset
972 + my_offset
973 + s->output_section->vma
974 - (input_section->output_offset
975 + input_section->output_section->vma
976 + offset + addend)
977 - 8;
bcbdc74c 978
252b5132
RH		 979 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
980
981 bfd_put_32 (output_bfd, tmp, hit_data
982 - input_section->vma);
983
252b5132
RH		 984 return true;
985}
986
987/* Perform a relocation as part of a final link. */
988static bfd_reloc_status_type
989elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
990 input_section, contents, rel, value,
780a67af 991 info, sym_sec, sym_name, sym_flags, h)
252b5132
RH		 992 reloc_howto_type * howto;
993 bfd * input_bfd;
994 bfd * output_bfd;
995 asection * input_section;
996 bfd_byte * contents;
997 Elf_Internal_Rela * rel;
998 bfd_vma value;
999 struct bfd_link_info * info;
1000 asection * sym_sec;
1001 const char * sym_name;
1002 unsigned char sym_flags;
780a67af 1003 struct elf_link_hash_entry * h;
252b5132
RH		 1004{
1005 unsigned long r_type = howto->type;
1006 unsigned long r_symndx;
1007 bfd_byte * hit_data = contents + rel->r_offset;
1008 bfd * dynobj = NULL;
1009 Elf_Internal_Shdr * symtab_hdr;
1010 struct elf_link_hash_entry ** sym_hashes;
1011 bfd_vma * local_got_offsets;
1012 asection * sgot = NULL;
1013 asection * splt = NULL;
1014 asection * sreloc = NULL;
252b5132 1015 bfd_vma addend;
ba96a88f
NC		 1016 bfd_signed_vma signed_addend;
1017 struct elf32_arm_link_hash_table * globals;
f21f3fe0 1018
ba96a88f 1019 globals = elf32_arm_hash_table (info);
f21f3fe0 1020
252b5132
RH		 1021 dynobj = elf_hash_table (info)->dynobj;
1022 if (dynobj)
1023 {
1024 sgot = bfd_get_section_by_name (dynobj, ".got");
1025 splt = bfd_get_section_by_name (dynobj, ".plt");
1026 }
1027 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1028 sym_hashes = elf_sym_hashes (input_bfd);
1029 local_got_offsets = elf_local_got_offsets (input_bfd);
1030 r_symndx = ELF32_R_SYM (rel->r_info);
1031
1032#ifdef USE_REL
ba96a88f
NC		 1033 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1034
1035 if (addend & ((howto->src_mask + 1) >> 1))
1036 {
1037 signed_addend = -1;
1038 signed_addend &= ~ howto->src_mask;
1039 signed_addend |= addend;
1040 }
1041 else
1042 signed_addend = addend;
252b5132 1043#else
ba96a88f 1044 addend = signed_addend = rel->r_addend;
252b5132 1045#endif
f21f3fe0 1046
252b5132
RH		 1047 switch (r_type)
1048 {
1049 case R_ARM_NONE:
1050 return bfd_reloc_ok;
1051
1052 case R_ARM_PC24:
1053 case R_ARM_ABS32:
1054 case R_ARM_REL32:
1055 /* When generating a shared object, these relocations are copied
1056 into the output file to be resolved at run time. */
f21f3fe0 1057
252b5132
RH		 1058 if (info->shared
1059 && (r_type != R_ARM_PC24
1060 || (h != NULL
1061 && h->dynindx != -1
1062 && (! info->symbolic
1063 || (h->elf_link_hash_flags
1064 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1065 {
1066 Elf_Internal_Rel outrel;
1067 boolean skip, relocate;
f21f3fe0 1068
252b5132
RH		 1069 if (sreloc == NULL)
1070 {
1071 const char * name;
f21f3fe0 1072
252b5132
RH		 1073 name = (bfd_elf_string_from_elf_section
1074 (input_bfd,
1075 elf_elfheader (input_bfd)->e_shstrndx,
1076 elf_section_data (input_section)->rel_hdr.sh_name));
1077 if (name == NULL)
1078 return bfd_reloc_notsupported;
f21f3fe0 1079
252b5132
RH		 1080 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1081 && strcmp (bfd_get_section_name (input_bfd,
1082 input_section),
1083 name + 4) == 0);
f21f3fe0 1084
252b5132
RH		 1085 sreloc = bfd_get_section_by_name (dynobj, name);
1086 BFD_ASSERT (sreloc != NULL);
1087 }
f21f3fe0 1088
252b5132 1089 skip = false;
f21f3fe0 1090
252b5132
RH		 1091 if (elf_section_data (input_section)->stab_info == NULL)
1092 outrel.r_offset = rel->r_offset;
1093 else
1094 {
1095 bfd_vma off;
f21f3fe0 1096
252b5132
RH		 1097 off = (_bfd_stab_section_offset
1098 (output_bfd, &elf_hash_table (info)->stab_info,
1099 input_section,
1100 & elf_section_data (input_section)->stab_info,
1101 rel->r_offset));
1102 if (off == (bfd_vma) -1)
1103 skip = true;
1104 outrel.r_offset = off;
1105 }
f21f3fe0 1106
252b5132
RH		 1107 outrel.r_offset += (input_section->output_section->vma
1108 + input_section->output_offset);
f21f3fe0 1109
252b5132
RH		 1110 if (skip)
1111 {
1112 memset (&outrel, 0, sizeof outrel);
1113 relocate = false;
1114 }
1115 else if (r_type == R_ARM_PC24)
1116 {
1117 BFD_ASSERT (h != NULL && h->dynindx != -1);
1118 if ((input_section->flags & SEC_ALLOC) != 0)
1119 relocate = false;
1120 else
1121 relocate = true;
1122 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24);
1123 }
1124 else
1125 {
1126 if (h == NULL
1127 || ((info->symbolic || h->dynindx == -1)
1128 && (h->elf_link_hash_flags
1129 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1130 {
1131 relocate = true;
1132 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1133 }
1134 else
1135 {
1136 BFD_ASSERT (h->dynindx != -1);
1137 if ((input_section->flags & SEC_ALLOC) != 0)
1138 relocate = false;
1139 else
1140 relocate = true;
1141 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32);
1142 }
1143 }
f21f3fe0 1144
252b5132
RH		 1145 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1146 (((Elf32_External_Rel *)
1147 sreloc->contents)
1148 + sreloc->reloc_count));
1149 ++sreloc->reloc_count;
dece4658 1150
f21f3fe0 1151 /* If this reloc is against an external symbol, we do not want to
252b5132
RH		 1152 fiddle with the addend. Otherwise, we need to include the symbol
1153 value so that it becomes an addend for the dynamic reloc. */
1154 if (! relocate)
1155 return bfd_reloc_ok;
f21f3fe0 1156
dece4658 1157
f21f3fe0 1158 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1159 contents, rel->r_offset, value,
1160 (bfd_vma) 0);
1161 }
1162 else switch (r_type)
1163 {
1164 case R_ARM_PC24:
1165 /* Arm B/BL instruction */
f21f3fe0 1166
252b5132
RH		 1167 /* Check for arm calling thumb function. */
1168 if (sym_flags == STT_ARM_TFUNC)
1169 {
1170 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
bcbdc74c
NC		 1171 input_section, hit_data, sym_sec, rel->r_offset,
1172 signed_addend, value);
252b5132
RH		 1173 return bfd_reloc_ok;
1174 }
ba96a88f
NC		 1175
1176 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1177 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1178 {
1179 /* The old way of doing things. Trearing the addend as a
1180 byte sized field and adding in the pipeline offset. */
f21f3fe0 1181
ba96a88f
NC		 1182 value -= (input_section->output_section->vma
1183 + input_section->output_offset);
1184 value -= rel->r_offset;
1185 value += addend;
f21f3fe0 1186
ba96a88f
NC		 1187 if (! globals->no_pipeline_knowledge)
1188 value -= 8;
1189 }
1190 else
1191 {
1192 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1193 where:
1194 S is the address of the symbol in the relocation.
1195 P is address of the instruction being relocated.
1196 A is the addend (extracted from the instruction) in bytes.
f21f3fe0 1197
ba96a88f
NC		 1198 S is held in 'value'.
1199 P is the base address of the section containing the instruction
1200 plus the offset of the reloc into that section, ie:
1201 (input_section->output_section->vma +
1202 input_section->output_offset +
1203 rel->r_offset).
1204 A is the addend, converted into bytes, ie:
1205 (signed_addend * 4)
1206
1207 Note: None of these operations have knowledge of the pipeline
1208 size of the processor, thus it is up to the assembler to encode
1209 this information into the addend. */
1210
1211 value -= (input_section->output_section->vma
1212 + input_section->output_offset);
1213 value -= rel->r_offset;
1214 value += (signed_addend << howto->size);
f21f3fe0 1215
ba96a88f
NC		 1216 /* Previous versions of this code also used to add in the pipeline
1217 offset here. This is wrong because the linker is not supposed
1218 to know about such things, and one day it might change. In order
1219 to support old binaries that need the old behaviour however, so
1220 we attempt to detect which ABI was used to create the reloc. */
1221 if (! globals->no_pipeline_knowledge)
f21f3fe0 1222 {
ba96a88f 1223 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
f21f3fe0 1224
ba96a88f 1225 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1226
ba96a88f
NC		 1227 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1228 value -= 8;
1229 }
1230 }
23080146
NC		 1231
1232 /* Perform a signed range check. */
1233 signed_addend = value;
1234 signed_addend >>= howto->rightshift;
1235 if (signed_addend > ((bfd_signed_vma)(howto->dst_mask >> 1))
1236 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1237 return bfd_reloc_overflow;
dece4658 1238
23080146
NC		 1239 value = (signed_addend & howto->dst_mask)
1240 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 1241 break;
f21f3fe0 1242
252b5132
RH		 1243 case R_ARM_ABS32:
1244 value += addend;
1245 if (sym_flags == STT_ARM_TFUNC)
1246 value |= 1;
1247 break;
f21f3fe0 1248
252b5132
RH		 1249 case R_ARM_REL32:
1250 value -= (input_section->output_section->vma
1251 + input_section->output_offset);
1252 value += addend;
1253 break;
1254 }
f21f3fe0 1255
252b5132
RH		 1256 bfd_put_32 (input_bfd, value, hit_data);
1257 return bfd_reloc_ok;
1258
1259 case R_ARM_ABS8:
1260 value += addend;
1261 if ((long) value > 0x7f || (long) value < -0x80)
1262 return bfd_reloc_overflow;
1263
1264 bfd_put_8 (input_bfd, value, hit_data);
1265 return bfd_reloc_ok;
1266
1267 case R_ARM_ABS16:
1268 value += addend;
1269
1270 if ((long) value > 0x7fff || (long) value < -0x8000)
1271 return bfd_reloc_overflow;
1272
1273 bfd_put_16 (input_bfd, value, hit_data);
1274 return bfd_reloc_ok;
1275
1276 case R_ARM_ABS12:
1277 /* Support ldr and str instruction for the arm */
1278 /* Also thumb b (unconditional branch). ??? Really? */
1279 value += addend;
1280
1281 if ((long) value > 0x7ff || (long) value < -0x800)
1282 return bfd_reloc_overflow;
1283
1284 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1285 bfd_put_32 (input_bfd, value, hit_data);
1286 return bfd_reloc_ok;
1287
1288 case R_ARM_THM_ABS5:
1289 /* Support ldr and str instructions for the thumb. */
1290#ifdef USE_REL
1291 /* Need to refetch addend. */
1292 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1293 /* ??? Need to determine shift amount from operand size. */
1294 addend >>= howto->rightshift;
1295#endif
1296 value += addend;
1297
1298 /* ??? Isn't value unsigned? */
1299 if ((long) value > 0x1f || (long) value < -0x10)
1300 return bfd_reloc_overflow;
1301
1302 /* ??? Value needs to be properly shifted into place first. */
1303 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1304 bfd_put_16 (input_bfd, value, hit_data);
1305 return bfd_reloc_ok;
1306
1307 case R_ARM_THM_PC22:
1308 /* Thumb BL (branch long instruction). */
1309 {
ba96a88f
NC		 1310 bfd_vma relocation;
1311 boolean overflow = false;
1312 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1313 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
252b5132 1314 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
ba96a88f
NC		 1315 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1316 bfd_vma check;
252b5132 1317 bfd_signed_vma signed_check;
252b5132
RH		 1318
1319#ifdef USE_REL
1320 /* Need to refetch the addend and squish the two 11 bit pieces
1321 together. */
1322 {
ba96a88f
NC		 1323 bfd_vma upper = upper_insn & 0x7ff;
1324 bfd_vma lower = lower_insn & 0x7ff;
252b5132
RH		 1325 upper = (upper ^ 0x400) - 0x400; /* sign extend */
1326 addend = (upper << 12) | (lower << 1);
ba96a88f 1327 signed_addend = addend;
252b5132
RH		 1328 }
1329#endif
1330
bcbdc74c
NC		 1331 /* If it is not a call to thumb, assume call to arm.
1332 If it is a call relative to a section name, then it is not a
1333 function call at all, but rather a long jump. */
1334 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
252b5132
RH		 1335 {
1336 if (elf32_thumb_to_arm_stub
1337 (info, sym_name, input_bfd, output_bfd, input_section,
bcbdc74c 1338 hit_data, sym_sec, rel->r_offset, signed_addend, value))
252b5132
RH		 1339 return bfd_reloc_ok;
1340 else
1341 return bfd_reloc_dangerous;
1342 }
f21f3fe0 1343
ba96a88f 1344 relocation = value + signed_addend;
f21f3fe0 1345
252b5132 1346 relocation -= (input_section->output_section->vma
ba96a88f
NC		 1347 + input_section->output_offset
1348 + rel->r_offset);
dece4658 1349
ba96a88f
NC		 1350 if (! globals->no_pipeline_knowledge)
1351 {
1352 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
dece4658 1353
ba96a88f 1354 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1355
ba96a88f
NC		 1356 /* Previous versions of this code also used to add in the pipline
1357 offset here. This is wrong because the linker is not supposed
1358 to know about such things, and one day it might change. In order
1359 to support old binaries that need the old behaviour however, so
1360 we attempt to detect which ABI was used to create the reloc. */
1361 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1362 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1363 || i_ehdrp->e_ident[EI_OSABI] == 0)
1364 relocation += 4;
1365 }
f21f3fe0 1366
252b5132
RH		 1367 check = relocation >> howto->rightshift;
1368
1369 /* If this is a signed value, the rightshift just dropped
1370 leading 1 bits (assuming twos complement). */
1371 if ((bfd_signed_vma) relocation >= 0)
1372 signed_check = check;
1373 else
1374 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1375
252b5132 1376 /* Assumes two's complement. */
ba96a88f 1377 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
252b5132
RH		 1378 overflow = true;
1379
1380 /* Put RELOCATION back into the insn. */
1381 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1382 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1383
1384 /* Put the relocated value back in the object file: */
1385 bfd_put_16 (input_bfd, upper_insn, hit_data);
1386 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1387
1388 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1389 }
1390 break;
1391
1392 case R_ARM_GNU_VTINHERIT:
1393 case R_ARM_GNU_VTENTRY:
1394 return bfd_reloc_ok;
1395
1396 case R_ARM_COPY:
1397 return bfd_reloc_notsupported;
1398
1399 case R_ARM_GLOB_DAT:
1400 return bfd_reloc_notsupported;
1401
1402 case R_ARM_JUMP_SLOT:
1403 return bfd_reloc_notsupported;
1404
1405 case R_ARM_RELATIVE:
1406 return bfd_reloc_notsupported;
1407
1408 case R_ARM_GOTOFF:
1409 /* Relocation is relative to the start of the
1410 global offset table. */
1411
1412 BFD_ASSERT (sgot != NULL);
1413 if (sgot == NULL)
1414 return bfd_reloc_notsupported;
dece4658 1415
252b5132
RH		 1416 /* Note that sgot->output_offset is not involved in this
1417 calculation. We always want the start of .got. If we
1418 define _GLOBAL_OFFSET_TABLE in a different way, as is
1419 permitted by the ABI, we might have to change this
1420 calculation. */
f21f3fe0 1421
252b5132 1422 value -= sgot->output_section->vma;
f21f3fe0 1423 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1424 contents, rel->r_offset, value,
1425 (bfd_vma) 0);
1426
1427 case R_ARM_GOTPC:
1428 /* Use global offset table as symbol value. */
1429
1430 BFD_ASSERT (sgot != NULL);
f21f3fe0 1431
252b5132
RH		 1432 if (sgot == NULL)
1433 return bfd_reloc_notsupported;
1434
1435 value = sgot->output_section->vma;
f21f3fe0 1436 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1437 contents, rel->r_offset, value,
1438 (bfd_vma) 0);
f21f3fe0 1439
252b5132
RH		 1440 case R_ARM_GOT32:
1441 /* Relocation is to the entry for this symbol in the
1442 global offset table. */
1443 if (sgot == NULL)
1444 return bfd_reloc_notsupported;
f21f3fe0 1445
252b5132
RH		 1446 if (h != NULL)
1447 {
1448 bfd_vma off;
f21f3fe0 1449
252b5132
RH		 1450 off = h->got.offset;
1451 BFD_ASSERT (off != (bfd_vma) -1);
f21f3fe0 1452
252b5132
RH		 1453 if (!elf_hash_table (info)->dynamic_sections_created ||
1454 (info->shared && (info->symbolic || h->dynindx == -1)
1455 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1456 {
1457 /* This is actually a static link, or it is a -Bsymbolic link
1458 and the symbol is defined locally. We must initialize this
1459 entry in the global offset table. Since the offset must
1460 always be a multiple of 4, we use the least significant bit
1461 to record whether we have initialized it already.
f21f3fe0 1462
252b5132 1463 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1464 entry to initialize the value. This is done in the
252b5132 1465 finish_dynamic_symbol routine. */
f21f3fe0 1466
252b5132
RH		 1467 if ((off & 1) != 0)
1468 off &= ~1;
1469 else
1470 {
1471 bfd_put_32 (output_bfd, value, sgot->contents + off);
1472 h->got.offset |= 1;
1473 }
1474 }
f21f3fe0 1475
252b5132
RH		 1476 value = sgot->output_offset + off;
1477 }
1478 else
1479 {
1480 bfd_vma off;
f21f3fe0 1481
252b5132
RH		 1482 BFD_ASSERT (local_got_offsets != NULL &&
1483 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1484
252b5132 1485 off = local_got_offsets[r_symndx];
f21f3fe0 1486
252b5132
RH		 1487 /* The offset must always be a multiple of 4. We use the
1488 least significant bit to record whether we have already
1489 generated the necessary reloc. */
1490 if ((off & 1) != 0)
1491 off &= ~1;
1492 else
1493 {
1494 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1495
252b5132
RH		 1496 if (info->shared)
1497 {
1498 asection * srelgot;
1499 Elf_Internal_Rel outrel;
f21f3fe0 1500
252b5132
RH		 1501 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1502 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1503
252b5132 1504 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1505 + sgot->output_offset
252b5132
RH		 1506 + off);
1507 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1508 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1509 (((Elf32_External_Rel *)
1510 srelgot->contents)
1511 + srelgot->reloc_count));
1512 ++srelgot->reloc_count;
1513 }
f21f3fe0 1514
252b5132
RH		 1515 local_got_offsets[r_symndx] |= 1;
1516 }
f21f3fe0 1517
252b5132
RH		 1518 value = sgot->output_offset + off;
1519 }
dece4658 1520
f21f3fe0 1521 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1522 contents, rel->r_offset, value,
1523 (bfd_vma) 0);
f21f3fe0 1524
252b5132
RH		 1525 case R_ARM_PLT32:
1526 /* Relocation is to the entry for this symbol in the
1527 procedure linkage table. */
1528
1529 /* Resolve a PLT32 reloc against a local symbol directly,
1530 without using the procedure linkage table. */
1531 if (h == NULL)
1532 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1533 contents, rel->r_offset, value,
1534 (bfd_vma) 0);
1535
1536 if (h->plt.offset == (bfd_vma) -1)
1537 /* We didn't make a PLT entry for this symbol. This
1538 happens when statically linking PIC code, or when
1539 using -Bsymbolic. */
1540 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1541 contents, rel->r_offset, value,
1542 (bfd_vma) 0);
1543
1544 BFD_ASSERT(splt != NULL);
1545 if (splt == NULL)
1546 return bfd_reloc_notsupported;
1547
1548 value = (splt->output_section->vma
1549 + splt->output_offset
1550 + h->plt.offset);
1551 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1552 contents, rel->r_offset, value,
1553 (bfd_vma) 0);
f21f3fe0 1554
252b5132
RH		 1555 case R_ARM_SBREL32:
1556 return bfd_reloc_notsupported;
1557
1558 case R_ARM_AMP_VCALL9:
1559 return bfd_reloc_notsupported;
1560
1561 case R_ARM_RSBREL32:
1562 return bfd_reloc_notsupported;
1563
1564 case R_ARM_THM_RPC22:
1565 return bfd_reloc_notsupported;
1566
1567 case R_ARM_RREL32:
1568 return bfd_reloc_notsupported;
1569
1570 case R_ARM_RABS32:
1571 return bfd_reloc_notsupported;
1572
1573 case R_ARM_RPC24:
1574 return bfd_reloc_notsupported;
1575
1576 case R_ARM_RBASE:
1577 return bfd_reloc_notsupported;
1578
1579 default:
1580 return bfd_reloc_notsupported;
1581 }
1582}
1583
1584
1585/* Relocate an ARM ELF section. */
1586static boolean
1587elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1588 contents, relocs, local_syms, local_sections)
1589 bfd * output_bfd;
1590 struct bfd_link_info * info;
1591 bfd * input_bfd;
1592 asection * input_section;
1593 bfd_byte * contents;
1594 Elf_Internal_Rela * relocs;
1595 Elf_Internal_Sym * local_syms;
1596 asection ** local_sections;
1597{
1598 Elf_Internal_Shdr * symtab_hdr;
1599 struct elf_link_hash_entry ** sym_hashes;
1600 Elf_Internal_Rela * rel;
1601 Elf_Internal_Rela * relend;
1602 const char * name;
1603
1604 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1605 sym_hashes = elf_sym_hashes (input_bfd);
1606
1607 rel = relocs;
1608 relend = relocs + input_section->reloc_count;
1609 for (; rel < relend; rel++)
1610 {
ba96a88f
NC		 1611 int r_type;
1612 reloc_howto_type * howto;
1613 unsigned long r_symndx;
1614 Elf_Internal_Sym * sym;
1615 asection * sec;
252b5132 1616 struct elf_link_hash_entry * h;
ba96a88f
NC		 1617 bfd_vma relocation;
1618 bfd_reloc_status_type r;
1619 arelent bfd_reloc;
f21f3fe0 1620
252b5132 1621 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 1622 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1623
ba96a88f
NC		 1624 if ( r_type == R_ARM_GNU_VTENTRY
1625 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 1626 continue;
1627
ba96a88f
NC		 1628 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1629 howto = bfd_reloc.howto;
252b5132
RH		 1630
1631 if (info->relocateable)
1632 {
1633 /* This is a relocateable link. We don't have to change
1634 anything, unless the reloc is against a section symbol,
1635 in which case we have to adjust according to where the
1636 section symbol winds up in the output section. */
1637 if (r_symndx < symtab_hdr->sh_info)
1638 {
1639 sym = local_syms + r_symndx;
1640 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1641 {
1642 sec = local_sections[r_symndx];
1643#ifdef USE_REL
1644 {
1645 bfd_vma val;
2ef994e0 1646 bfd_vma insn;
f21f3fe0 1647
2ef994e0 1648 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
f21f3fe0 1649 val = insn + ((sec->output_offset + sym->st_value)
2ef994e0
NC		 1650 >> howto->rightshift);
1651 val &= howto->dst_mask;
1652 val |= insn & ~(howto->dst_mask);
f21f3fe0 1653
252b5132
RH		 1654 bfd_put_32 (input_bfd, val, contents + rel->r_offset);
1655 }
1656#else
1657 rel->r_addend += (sec->output_offset + sym->st_value)
1658 >> howto->rightshift;
1659#endif
1660 }
1661 }
1662
1663 continue;
1664 }
1665
1666 /* This is a final link. */
1667 h = NULL;
1668 sym = NULL;
1669 sec = NULL;
1670 if (r_symndx < symtab_hdr->sh_info)
1671 {
1672 sym = local_syms + r_symndx;
1673 sec = local_sections[r_symndx];
1674 relocation = (sec->output_section->vma
1675 + sec->output_offset
1676 + sym->st_value);
1677 }
1678 else
1679 {
1680 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1681 while (h->root.type == bfd_link_hash_indirect
1682 || h->root.type == bfd_link_hash_warning)
1683 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1684 if (h->root.type == bfd_link_hash_defined
1685 || h->root.type == bfd_link_hash_defweak)
1686 {
780a67af 1687 int relocation_needed = 1;
f21f3fe0 1688
780a67af 1689 sec = h->root.u.def.section;
f21f3fe0 1690
252b5132 1691 /* In these cases, we don't need the relocation value.
f21f3fe0 1692 We check specially because in some obscure cases
252b5132
RH		 1693 sec->output_section will be NULL. */
1694 switch (r_type)
1695 {
1696 case R_ARM_PC24:
1697 case R_ARM_ABS32:
1698 if (info->shared
1699 && (
1700 (!info->symbolic && h->dynindx != -1)
97eaf9de 1701 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132
RH		 1702 )
1703 && ((input_section->flags & SEC_ALLOC) != 0)
1704 )
780a67af 1705 relocation_needed = 0;
252b5132 1706 break;
f21f3fe0 1707
252b5132 1708 case R_ARM_GOTPC:
780a67af 1709 relocation_needed = 0;
252b5132 1710 break;
f21f3fe0 1711
252b5132
RH		 1712 case R_ARM_GOT32:
1713 if (elf_hash_table(info)->dynamic_sections_created
1714 && (!info->shared
1715 || (!info->symbolic && h->dynindx != -1)
1716 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1717 )
1718 )
780a67af 1719 relocation_needed = 0;
252b5132 1720 break;
f21f3fe0 1721
252b5132
RH		 1722 case R_ARM_PLT32:
1723 if (h->plt.offset != (bfd_vma)-1)
780a67af 1724 relocation_needed = 0;
252b5132 1725 break;
f21f3fe0 1726
252b5132
RH		 1727 default:
1728 if (sec->output_section == NULL)
1729 {
1730 (*_bfd_error_handler)
1731 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1732 bfd_get_filename (input_bfd), h->root.root.string,
1733 bfd_get_section_name (input_bfd, input_section));
780a67af 1734 relocation_needed = 0;
252b5132
RH		 1735 }
1736 }
780a67af
NC		 1737
1738 if (relocation_needed)
1739 relocation = h->root.u.def.value
1740 + sec->output_section->vma
1741 + sec->output_offset;
1742 else
1743 relocation = 0;
252b5132
RH		 1744 }
1745 else if (h->root.type == bfd_link_hash_undefweak)
1746 relocation = 0;
a72747a3
NC		 1747 else if (info->shared && !info->symbolic && !info->no_undefined)
1748 relocation = 0;
252b5132
RH		 1749 else
1750 {
1751 if (!((*info->callbacks->undefined_symbol)
1752 (info, h->root.root.string, input_bfd,
1753 input_section, rel->r_offset)))
1754 return false;
1755 relocation = 0;
1756 }
1757 }
1758
1759 if (h != NULL)
1760 name = h->root.root.string;
1761 else
1762 {
1763 name = (bfd_elf_string_from_elf_section
1764 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1765 if (name == NULL || *name == '\0')
1766 name = bfd_section_name (input_bfd, sec);
1767 }
f21f3fe0 1768
252b5132
RH		 1769 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1770 input_section, contents, rel,
1771 relocation, info, sec, name,
1772 (h ? ELF_ST_TYPE (h->type) :
780a67af 1773 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH		 1774
1775 if (r != bfd_reloc_ok)
1776 {
1777 const char * msg = (const char *) 0;
1778
1779 switch (r)
1780 {
1781 case bfd_reloc_overflow:
1782 if (!((*info->callbacks->reloc_overflow)
1783 (info, name, howto->name, (bfd_vma) 0,
1784 input_bfd, input_section, rel->r_offset)))
1785 return false;
1786 break;
1787
1788 case bfd_reloc_undefined:
1789 if (!((*info->callbacks->undefined_symbol)
1790 (info, name, input_bfd, input_section,
1791 rel->r_offset)))
1792 return false;
1793 break;
1794
1795 case bfd_reloc_outofrange:
1796 msg = _ ("internal error: out of range error");
1797 goto common_error;
1798
1799 case bfd_reloc_notsupported:
1800 msg = _ ("internal error: unsupported relocation error");
1801 goto common_error;
1802
1803 case bfd_reloc_dangerous:
1804 msg = _ ("internal error: dangerous error");
1805 goto common_error;
1806
1807 default:
1808 msg = _ ("internal error: unknown error");
1809 /* fall through */
1810
1811 common_error:
1812 if (!((*info->callbacks->warning)
1813 (info, msg, name, input_bfd, input_section,
1814 rel->r_offset)))
1815 return false;
1816 break;
1817 }
1818 }
1819 }
1820
1821 return true;
1822}
1823
1824/* Function to keep ARM specific flags in the ELF header. */
1825static boolean
1826elf32_arm_set_private_flags (abfd, flags)
1827 bfd *abfd;
1828 flagword flags;
1829{
1830 if (elf_flags_init (abfd)
1831 && elf_elfheader (abfd)->e_flags != flags)
1832 {
1833 if (flags & EF_INTERWORK)
1834 _bfd_error_handler (_ ("\
1835Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
1836 bfd_get_filename (abfd));
1837 else
1838 _bfd_error_handler (_ ("\
1839Warning: Clearing the interwork flag of %s due to outside request"),
1840 bfd_get_filename (abfd));
1841 }
1842 else
1843 {
1844 elf_elfheader (abfd)->e_flags = flags;
1845 elf_flags_init (abfd) = true;
1846 }
1847
1848 return true;
1849}
1850
1851/* Copy backend specific data from one object module to another */
1852static boolean
1853elf32_arm_copy_private_bfd_data (ibfd, obfd)
1854 bfd *ibfd;
1855 bfd *obfd;
1856{
1857 flagword in_flags;
1858 flagword out_flags;
1859
1860 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1861 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1862 return true;
1863
1864 in_flags = elf_elfheader (ibfd)->e_flags;
1865 out_flags = elf_elfheader (obfd)->e_flags;
1866
1867 if (elf_flags_init (obfd) && in_flags != out_flags)
1868 {
1869 /* Cannot mix PIC and non-PIC code. */
1870 if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
1871 return false;
1872
1873 /* Cannot mix APCS26 and APCS32 code. */
1874 if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
1875 return false;
1876
1877 /* Cannot mix float APCS and non-float APCS code. */
1878 if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
1879 return false;
1880
1881 /* If the src and dest have different interworking flags
1882 then turn off the interworking bit. */
1883 if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
1884 {
1885 if (out_flags & EF_INTERWORK)
1886 _bfd_error_handler (_ ("\
1887Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
1888 bfd_get_filename (obfd), bfd_get_filename (ibfd));
1889
1890 in_flags &= ~EF_INTERWORK;
1891 }
1892 }
1893
1894 elf_elfheader (obfd)->e_flags = in_flags;
1895 elf_flags_init (obfd) = true;
1896
1897 return true;
1898}
1899
1900/* Merge backend specific data from an object file to the output
1901 object file when linking. */
1902static boolean
1903elf32_arm_merge_private_bfd_data (ibfd, obfd)
1904 bfd *ibfd;
1905 bfd *obfd;
1906{
1907 flagword out_flags;
1908 flagword in_flags;
1909
1910 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1911 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1912 return true;
1913
1914 /* Check if we have the same endianess */
1915 if ( ibfd->xvec->byteorder != obfd->xvec->byteorder
1916 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
1917 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1918 {
1919 (*_bfd_error_handler)
1920 (_("%s: compiled for a %s endian system and target is %s endian"),
1921 bfd_get_filename (ibfd),
1922 bfd_big_endian (ibfd) ? "big" : "little",
1923 bfd_big_endian (obfd) ? "big" : "little");
1924
1925 bfd_set_error (bfd_error_wrong_format);
1926 return false;
1927 }
1928
1929 /* The input BFD must have had its flags initialised. */
1930 /* The following seems bogus to me -- The flags are initialized in
1931 the assembler but I don't think an elf_flags_init field is
1932 written into the object */
1933 /* BFD_ASSERT (elf_flags_init (ibfd)); */
1934
1935 in_flags = elf_elfheader (ibfd)->e_flags;
1936 out_flags = elf_elfheader (obfd)->e_flags;
1937
1938 if (!elf_flags_init (obfd))
1939 {
1940 /* If the input is the default architecture then do not
1941 bother setting the flags for the output architecture,
1942 instead allow future merges to do this. If no future
1943 merges ever set these flags then they will retain their
1944 unitialised values, which surprise surprise, correspond
1945 to the default values. */
1946 if (bfd_get_arch_info (ibfd)->the_default)
1947 return true;
1948
1949 elf_flags_init (obfd) = true;
1950 elf_elfheader (obfd)->e_flags = in_flags;
1951
1952 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1953 && bfd_get_arch_info (obfd)->the_default)
1954 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
1955
1956 return true;
1957 }
1958
1959 /* Check flag compatibility. */
1960 if (in_flags == out_flags)
1961 return true;
1962
1963 /* Complain about various flag mismatches. */
1964
1965 if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
1966 _bfd_error_handler (_ ("\
1967Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
1968 bfd_get_filename (ibfd),
1969 in_flags & EF_APCS_26 ? 26 : 32,
1970 bfd_get_filename (obfd),
1971 out_flags & EF_APCS_26 ? 26 : 32);
1972
1973 if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
1974 _bfd_error_handler (_ ("\
1975Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
1976 bfd_get_filename (ibfd),
1977 in_flags & EF_APCS_FLOAT ? _ ("float") : _ ("integer"),
1978 bfd_get_filename (obfd),
1979 out_flags & EF_APCS_26 ? _ ("float") : _ ("integer"));
1980
1981 if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
1982 _bfd_error_handler (_ ("\
1983Error: %s is compiled as position %s code, whereas %s is not"),
1984 bfd_get_filename (ibfd),
1985 in_flags & EF_PIC ? _ ("independent") : _ ("dependent"),
1986 bfd_get_filename (obfd));
1987
1988 /* Interworking mismatch is only a warning. */
1989 if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
1990 {
1991 _bfd_error_handler (_ ("\
1992Warning: %s %s interworking, whereas %s %s"),
1993 bfd_get_filename (ibfd),
1994 in_flags & EF_INTERWORK ? _ ("supports") : _ ("does not support"),
1995 bfd_get_filename (obfd),
1996 out_flags & EF_INTERWORK ? _ ("does not") : _ ("does"));
1997 return true;
1998 }
1999
2000 return false;
2001}
2002
2003/* Display the flags field */
2004static boolean
2005elf32_arm_print_private_bfd_data (abfd, ptr)
2006 bfd *abfd;
2007 PTR ptr;
2008{
2009 FILE *file = (FILE *) ptr;
2010
2011 BFD_ASSERT (abfd != NULL && ptr != NULL);
2012
2013 /* Print normal ELF private data. */
2014 _bfd_elf_print_private_bfd_data (abfd, ptr);
2015
2016 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
2017
2018 /* xgettext:c-format */
2019 fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2020
2021 if (elf_elfheader (abfd)->e_flags & EF_INTERWORK)
2022 fprintf (file, _ (" [interworking enabled]"));
2023 else
2024 fprintf (file, _ (" [interworking not enabled]"));
2025
2026 if (elf_elfheader (abfd)->e_flags & EF_APCS_26)
2027 fprintf (file, _ (" [APCS-26]"));
2028 else
2029 fprintf (file, _ (" [APCS-32]"));
2030
2031 if (elf_elfheader (abfd)->e_flags & EF_APCS_FLOAT)
2032 fprintf (file, _ (" [floats passed in float registers]"));
2033 else
2034 fprintf (file, _ (" [floats passed in integer registers]"));
2035
2036 if (elf_elfheader (abfd)->e_flags & EF_PIC)
2037 fprintf (file, _ (" [position independent]"));
2038 else
2039 fprintf (file, _ (" [absolute position]"));
2040
2041 fputc ('\n', file);
2042
2043 return true;
2044}
2045
2046static int
2047elf32_arm_get_symbol_type (elf_sym, type)
2048 Elf_Internal_Sym * elf_sym;
2049 int type;
2050{
2051 if (ELF_ST_TYPE (elf_sym->st_info) == STT_ARM_TFUNC)
2052 return ELF_ST_TYPE (elf_sym->st_info);
2053 else
2054 return type;
2055}
f21f3fe0 2056
252b5132
RH		 2057static asection *
2058elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2059 bfd *abfd;
5f771d47 2060 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2061 Elf_Internal_Rela *rel;
2062 struct elf_link_hash_entry *h;
2063 Elf_Internal_Sym *sym;
2064{
2065 if (h != NULL)
2066 {
2067 switch (ELF32_R_TYPE (rel->r_info))
2068 {
2069 case R_ARM_GNU_VTINHERIT:
2070 case R_ARM_GNU_VTENTRY:
2071 break;
2072
2073 default:
2074 switch (h->root.type)
2075 {
2076 case bfd_link_hash_defined:
2077 case bfd_link_hash_defweak:
2078 return h->root.u.def.section;
2079
2080 case bfd_link_hash_common:
2081 return h->root.u.c.p->section;
e049a0de
ILT		 2082
2083 default:
2084 break;
252b5132
RH		 2085 }
2086 }
2087 }
2088 else
2089 {
2090 if (!(elf_bad_symtab (abfd)
2091 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
2092 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
2093 && sym->st_shndx != SHN_COMMON))
2094 {
2095 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2096 }
2097 }
2098 return NULL;
2099}
2100
780a67af
NC		 2101/* Update the got entry reference counts for the section being removed. */
2102
252b5132
RH		 2103static boolean
2104elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 2105 bfd *abfd ATTRIBUTE_UNUSED;
2106 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2107 asection *sec ATTRIBUTE_UNUSED;
2108 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2109{
780a67af 2110 /* We don't support garbage collection of GOT and PLT relocs yet. */
252b5132
RH		 2111 return true;
2112}
2113
780a67af
NC		 2114/* Look through the relocs for a section during the first phase. */
2115
252b5132
RH		 2116static boolean
2117elf32_arm_check_relocs (abfd, info, sec, relocs)
2118 bfd * abfd;
2119 struct bfd_link_info * info;
2120 asection * sec;
2121 const Elf_Internal_Rela * relocs;
2122{
2123 Elf_Internal_Shdr * symtab_hdr;
2124 struct elf_link_hash_entry ** sym_hashes;
2125 struct elf_link_hash_entry ** sym_hashes_end;
2126 const Elf_Internal_Rela * rel;
2127 const Elf_Internal_Rela * rel_end;
2128 bfd * dynobj;
2129 asection * sgot, *srelgot, *sreloc;
2130 bfd_vma * local_got_offsets;
dece4658 2131
252b5132
RH		 2132 if (info->relocateable)
2133 return true;
dece4658 2134
252b5132 2135 sgot = srelgot = sreloc = NULL;
dece4658 2136
252b5132
RH		 2137 dynobj = elf_hash_table (info)->dynobj;
2138 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2139
252b5132
RH		 2140 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2141 sym_hashes = elf_sym_hashes (abfd);
2142 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
2143 if (!elf_bad_symtab (abfd))
2144 sym_hashes_end -= symtab_hdr->sh_info;
dece4658 2145
252b5132
RH		 2146 rel_end = relocs + sec->reloc_count;
2147 for (rel = relocs; rel < rel_end; rel++)
2148 {
2149 struct elf_link_hash_entry *h;
2150 unsigned long r_symndx;
dece4658 2151
252b5132
RH		 2152 r_symndx = ELF32_R_SYM (rel->r_info);
2153 if (r_symndx < symtab_hdr->sh_info)
2154 h = NULL;
2155 else
2156 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
dece4658 2157
252b5132
RH		 2158 /* Some relocs require a global offset table. */
2159 if (dynobj == NULL)
2160 {
2161 switch (ELF32_R_TYPE (rel->r_info))
2162 {
2163 case R_ARM_GOT32:
2164 case R_ARM_GOTOFF:
2165 case R_ARM_GOTPC:
2166 elf_hash_table (info)->dynobj = dynobj = abfd;
2167 if (! _bfd_elf_create_got_section (dynobj, info))
2168 return false;
2169 break;
2170
2171 default:
2172 break;
2173 }
2174 }
2175
2176 switch (ELF32_R_TYPE (rel->r_info))
2177 {
2178 case R_ARM_GOT32:
2179 /* This symbol requires a global offset table entry. */
2180 if (sgot == NULL)
2181 {
2182 sgot = bfd_get_section_by_name (dynobj, ".got");
2183 BFD_ASSERT (sgot != NULL);
2184 }
2185
2186 /* Get the got relocation section if necessary. */
2187 if (srelgot == NULL
2188 && (h != NULL || info->shared))
2189 {
2190 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
dece4658 2191
252b5132
RH		 2192 /* If no got relocation section, make one and initialize. */
2193 if (srelgot == NULL)
2194 {
2195 srelgot = bfd_make_section (dynobj, ".rel.got");
2196 if (srelgot == NULL
2197 || ! bfd_set_section_flags (dynobj, srelgot,
2198 (SEC_ALLOC
2199 | SEC_LOAD
2200 | SEC_HAS_CONTENTS
2201 | SEC_IN_MEMORY
2202 | SEC_LINKER_CREATED
2203 | SEC_READONLY))
2204 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2205 return false;
2206 }
2207 }
2208
2209 if (h != NULL)
2210 {
2211 if (h->got.offset != (bfd_vma) -1)
2212 /* We have already allocated space in the .got. */
2213 break;
f21f3fe0 2214
252b5132
RH		 2215 h->got.offset = sgot->_raw_size;
2216
2217 /* Make sure this symbol is output as a dynamic symbol. */
2218 if (h->dynindx == -1)
2219 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2220 return false;
2221
2222 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2223 }
2224 else
2225 {
2226 /* This is a global offset table entry for a local
2227 symbol. */
2228 if (local_got_offsets == NULL)
2229 {
2230 size_t size;
2231 register unsigned int i;
2232
2233 size = symtab_hdr->sh_info * sizeof (bfd_vma);
2234 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2235 if (local_got_offsets == NULL)
2236 return false;
2237 elf_local_got_offsets (abfd) = local_got_offsets;
2238 for (i = 0; i < symtab_hdr->sh_info; i++)
2239 local_got_offsets[i] = (bfd_vma) -1;
2240 }
f21f3fe0 2241
252b5132
RH		 2242 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2243 /* We have already allocated space in the .got. */
2244 break;
2245
2246 local_got_offsets[r_symndx] = sgot->_raw_size;
2247
2248 if (info->shared)
2249 /* If we are generating a shared object, we need to
2250 output a R_ARM_RELATIVE reloc so that the dynamic
2251 linker can adjust this GOT entry. */
2252 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2253 }
2254
2255 sgot->_raw_size += 4;
2256 break;
2257
2258 case R_ARM_PLT32:
2259 /* This symbol requires a procedure linkage table entry. We
2260 actually build the entry in adjust_dynamic_symbol,
2261 because this might be a case of linking PIC code which is
2262 never referenced by a dynamic object, in which case we
2263 don't need to generate a procedure linkage table entry
2264 after all. */
2265
2266 /* If this is a local symbol, we resolve it directly without
2267 creating a procedure linkage table entry. */
2268 if (h == NULL)
2269 continue;
2270
2271 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2272 break;
2273
2274 case R_ARM_ABS32:
2275 case R_ARM_REL32:
2276 case R_ARM_PC24:
2277 /* If we are creating a shared library, and this is a reloc
2278 against a global symbol, or a non PC relative reloc
2279 against a local symbol, then we need to copy the reloc
2280 into the shared library. However, if we are linking with
2281 -Bsymbolic, we do not need to copy a reloc against a
2282 global symbol which is defined in an object we are
2283 including in the link (i.e., DEF_REGULAR is set). At
2284 this point we have not seen all the input files, so it is
2285 possible that DEF_REGULAR is not set now but will be set
2286 later (it is never cleared). We account for that
2287 possibility below by storing information in the
2288 pcrel_relocs_copied field of the hash table entry. */
2289 if (info->shared
2290 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2291 || (h != NULL
2292 && (! info->symbolic
2293 || (h->elf_link_hash_flags
2294 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2295 {
2296 /* When creating a shared object, we must copy these
2297 reloc types into the output file. We create a reloc
2298 section in dynobj and make room for this reloc. */
2299 if (sreloc == NULL)
2300 {
2301 const char * name;
2302
2303 name = (bfd_elf_string_from_elf_section
2304 (abfd,
2305 elf_elfheader (abfd)->e_shstrndx,
2306 elf_section_data (sec)->rel_hdr.sh_name));
2307 if (name == NULL)
2308 return false;
2309
2310 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2311 && strcmp (bfd_get_section_name (abfd, sec),
2312 name + 4) == 0);
2313
2314 sreloc = bfd_get_section_by_name (dynobj, name);
2315 if (sreloc == NULL)
2316 {
2317 flagword flags;
2318
2319 sreloc = bfd_make_section (dynobj, name);
2320 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2321 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2322 if ((sec->flags & SEC_ALLOC) != 0)
2323 flags |= SEC_ALLOC | SEC_LOAD;
2324 if (sreloc == NULL
2325 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2326 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2327 return false;
2328 }
2329 }
2330
2331 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2332 /* If we are linking with -Bsymbolic, and this is a
2333 global symbol, we count the number of PC relative
2334 relocations we have entered for this symbol, so that
2335 we can discard them again if the symbol is later
2336 defined by a regular object. Note that this function
2337 is only called if we are using an elf_i386 linker
2338 hash table, which means that h is really a pointer to
2339 an elf_i386_link_hash_entry. */
2340 if (h != NULL && info->symbolic
2341 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2342 {
2343 struct elf32_arm_link_hash_entry * eh;
2344 struct elf32_arm_pcrel_relocs_copied * p;
2345
2346 eh = (struct elf32_arm_link_hash_entry *) h;
2347
2348 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2349 if (p->section == sreloc)
2350 break;
2351
2352 if (p == NULL)
2353 {
2354 p = ((struct elf32_arm_pcrel_relocs_copied *)
2355 bfd_alloc (dynobj, sizeof * p));
f21f3fe0 2356
252b5132
RH		 2357 if (p == NULL)
2358 return false;
2359 p->next = eh->pcrel_relocs_copied;
2360 eh->pcrel_relocs_copied = p;
2361 p->section = sreloc;
2362 p->count = 0;
2363 }
2364
2365 ++p->count;
2366 }
2367 }
2368 break;
2369
2370 /* This relocation describes the C++ object vtable hierarchy.
2371 Reconstruct it for later use during GC. */
2372 case R_ARM_GNU_VTINHERIT:
2373 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2374 return false;
2375 break;
dece4658 2376
252b5132
RH		 2377 /* This relocation describes which C++ vtable entries are actually
2378 used. Record for later use during GC. */
2379 case R_ARM_GNU_VTENTRY:
d512aa07 2380 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
252b5132
RH		 2381 return false;
2382 break;
2383 }
2384 }
f21f3fe0 2385
252b5132
RH		 2386 return true;
2387}
2388
f21f3fe0 2389
252b5132
RH		 2390/* Find the nearest line to a particular section and offset, for error
2391 reporting. This code is a duplicate of the code in elf.c, except
2392 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
2393
2394static boolean
2395elf32_arm_find_nearest_line
2396 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2397 bfd * abfd;
2398 asection * section;
2399 asymbol ** symbols;
2400 bfd_vma offset;
2401 CONST char ** filename_ptr;
2402 CONST char ** functionname_ptr;
2403 unsigned int * line_ptr;
2404{
2405 boolean found;
2406 const char * filename;
2407 asymbol * func;
2408 bfd_vma low_func;
2409 asymbol ** p;
2410
2411 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 2412 filename_ptr, functionname_ptr,
5e38c3b8 2413 line_ptr, 0))
252b5132
RH		 2414 return true;
2415
2416 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2417 &found, filename_ptr,
2418 functionname_ptr, line_ptr,
2419 &elf_tdata (abfd)->line_info))
2420 return false;
f21f3fe0 2421
252b5132
RH		 2422 if (found)
2423 return true;
2424
2425 if (symbols == NULL)
2426 return false;
2427
2428 filename = NULL;
2429 func = NULL;
2430 low_func = 0;
2431
2432 for (p = symbols; *p != NULL; p++)
2433 {
2434 elf_symbol_type *q;
2435
2436 q = (elf_symbol_type *) *p;
2437
2438 if (bfd_get_section (&q->symbol) != section)
2439 continue;
2440
2441 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2442 {
2443 default:
2444 break;
2445 case STT_FILE:
2446 filename = bfd_asymbol_name (&q->symbol);
2447 break;
2448 case STT_NOTYPE:
2449 case STT_FUNC:
2450 case STT_ARM_TFUNC:
2451 if (q->symbol.section == section
2452 && q->symbol.value >= low_func
2453 && q->symbol.value <= offset)
2454 {
2455 func = (asymbol *) q;
2456 low_func = q->symbol.value;
2457 }
2458 break;
2459 }
2460 }
2461
2462 if (func == NULL)
2463 return false;
2464
2465 *filename_ptr = filename;
2466 *functionname_ptr = bfd_asymbol_name (func);
2467 *line_ptr = 0;
f21f3fe0 2468
252b5132
RH		 2469 return true;
2470}
2471
2472/* Adjust a symbol defined by a dynamic object and referenced by a
2473 regular object. The current definition is in some section of the
2474 dynamic object, but we're not including those sections. We have to
2475 change the definition to something the rest of the link can
2476 understand. */
2477
2478static boolean
2479elf32_arm_adjust_dynamic_symbol (info, h)
2480 struct bfd_link_info * info;
2481 struct elf_link_hash_entry * h;
2482{
2483 bfd * dynobj;
2484 asection * s;
2485 unsigned int power_of_two;
2486
2487 dynobj = elf_hash_table (info)->dynobj;
2488
2489 /* Make sure we know what is going on here. */
2490 BFD_ASSERT (dynobj != NULL
2491 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2492 || h->weakdef != NULL
2493 || ((h->elf_link_hash_flags
2494 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2495 && (h->elf_link_hash_flags
2496 & ELF_LINK_HASH_REF_REGULAR) != 0
2497 && (h->elf_link_hash_flags
2498 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2499
2500 /* If this is a function, put it in the procedure linkage table. We
2501 will fill in the contents of the procedure linkage table later,
2502 when we know the address of the .got section. */
2503 if (h->type == STT_FUNC
2504 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2505 {
2506 if (! info->shared
2507 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2508 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2509 {
2510 /* This case can occur if we saw a PLT32 reloc in an input
2511 file, but the symbol was never referred to by a dynamic
2512 object. In such a case, we don't actually need to build
2513 a procedure linkage table, and we can just do a PC32
2514 reloc instead. */
2515 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2516 return true;
2517 }
2518
2519 /* Make sure this symbol is output as a dynamic symbol. */
2520 if (h->dynindx == -1)
2521 {
2522 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2523 return false;
2524 }
2525
2526 s = bfd_get_section_by_name (dynobj, ".plt");
2527 BFD_ASSERT (s != NULL);
2528
2529 /* If this is the first .plt entry, make room for the special
2530 first entry. */
2531 if (s->_raw_size == 0)
2532 s->_raw_size += PLT_ENTRY_SIZE;
2533
2534 /* If this symbol is not defined in a regular file, and we are
2535 not generating a shared library, then set the symbol to this
2536 location in the .plt. This is required to make function
2537 pointers compare as equal between the normal executable and
2538 the shared library. */
2539 if (! info->shared
2540 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2541 {
2542 h->root.u.def.section = s;
2543 h->root.u.def.value = s->_raw_size;
2544 }
2545
2546 h->plt.offset = s->_raw_size;
2547
2548 /* Make room for this entry. */
2549 s->_raw_size += PLT_ENTRY_SIZE;
2550
2551 /* We also need to make an entry in the .got.plt section, which
2552 will be placed in the .got section by the linker script. */
2553
2554 s = bfd_get_section_by_name (dynobj, ".got.plt");
2555 BFD_ASSERT (s != NULL);
2556 s->_raw_size += 4;
2557
2558 /* We also need to make an entry in the .rel.plt section. */
2559
2560 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2561 BFD_ASSERT (s != NULL);
2562 s->_raw_size += sizeof (Elf32_External_Rel);
2563
2564 return true;
2565 }
2566
2567 /* If this is a weak symbol, and there is a real definition, the
2568 processor independent code will have arranged for us to see the
2569 real definition first, and we can just use the same value. */
2570 if (h->weakdef != NULL)
2571 {
2572 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2573 || h->weakdef->root.type == bfd_link_hash_defweak);
2574 h->root.u.def.section = h->weakdef->root.u.def.section;
2575 h->root.u.def.value = h->weakdef->root.u.def.value;
2576 return true;
2577 }
2578
2579 /* This is a reference to a symbol defined by a dynamic object which
2580 is not a function. */
2581
2582 /* If we are creating a shared library, we must presume that the
2583 only references to the symbol are via the global offset table.
2584 For such cases we need not do anything here; the relocations will
2585 be handled correctly by relocate_section. */
2586 if (info->shared)
2587 return true;
2588
2589 /* We must allocate the symbol in our .dynbss section, which will
2590 become part of the .bss section of the executable. There will be
2591 an entry for this symbol in the .dynsym section. The dynamic
2592 object will contain position independent code, so all references
2593 from the dynamic object to this symbol will go through the global
2594 offset table. The dynamic linker will use the .dynsym entry to
2595 determine the address it must put in the global offset table, so
2596 both the dynamic object and the regular object will refer to the
2597 same memory location for the variable. */
2598
2599 s = bfd_get_section_by_name (dynobj, ".dynbss");
2600 BFD_ASSERT (s != NULL);
2601
2602 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2603 copy the initial value out of the dynamic object and into the
2604 runtime process image. We need to remember the offset into the
2605 .rel.bss section we are going to use. */
2606 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2607 {
2608 asection *srel;
2609
2610 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
2611 BFD_ASSERT (srel != NULL);
2612 srel->_raw_size += sizeof (Elf32_External_Rel);
2613 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2614 }
2615
2616 /* We need to figure out the alignment required for this symbol. I
2617 have no idea how ELF linkers handle this. */
2618 power_of_two = bfd_log2 (h->size);
2619 if (power_of_two > 3)
2620 power_of_two = 3;
2621
2622 /* Apply the required alignment. */
2623 s->_raw_size = BFD_ALIGN (s->_raw_size,
2624 (bfd_size_type) (1 << power_of_two));
2625 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2626 {
2627 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2628 return false;
2629 }
2630
2631 /* Define the symbol as being at this point in the section. */
2632 h->root.u.def.section = s;
2633 h->root.u.def.value = s->_raw_size;
2634
2635 /* Increment the section size to make room for the symbol. */
2636 s->_raw_size += h->size;
2637
2638 return true;
2639}
2640
2641/* Set the sizes of the dynamic sections. */
2642
2643static boolean
2644elf32_arm_size_dynamic_sections (output_bfd, info)
2645 bfd * output_bfd;
2646 struct bfd_link_info * info;
2647{
2648 bfd * dynobj;
2649 asection * s;
2650 boolean plt;
2651 boolean relocs;
2652 boolean reltext;
2653
2654 dynobj = elf_hash_table (info)->dynobj;
2655 BFD_ASSERT (dynobj != NULL);
2656
2657 if (elf_hash_table (info)->dynamic_sections_created)
2658 {
2659 /* Set the contents of the .interp section to the interpreter. */
2660 if (! info->shared)
2661 {
2662 s = bfd_get_section_by_name (dynobj, ".interp");
2663 BFD_ASSERT (s != NULL);
2664 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2665 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2666 }
2667 }
2668 else
2669 {
2670 /* We may have created entries in the .rel.got section.
2671 However, if we are not creating the dynamic sections, we will
2672 not actually use these entries. Reset the size of .rel.got,
2673 which will cause it to get stripped from the output file
2674 below. */
2675 s = bfd_get_section_by_name (dynobj, ".rel.got");
2676 if (s != NULL)
2677 s->_raw_size = 0;
2678 }
2679
2680 /* If this is a -Bsymbolic shared link, then we need to discard all
2681 PC relative relocs against symbols defined in a regular object.
2682 We allocated space for them in the check_relocs routine, but we
2683 will not fill them in in the relocate_section routine. */
2684 if (info->shared && info->symbolic)
2685 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
2686 elf32_arm_discard_copies,
2687 (PTR) NULL);
2688
2689 /* The check_relocs and adjust_dynamic_symbol entry points have
2690 determined the sizes of the various dynamic sections. Allocate
2691 memory for them. */
2692 plt = false;
2693 relocs = false;
2694 reltext = false;
2695 for (s = dynobj->sections; s != NULL; s = s->next)
2696 {
2697 const char * name;
2698 boolean strip;
2699
2700 if ((s->flags & SEC_LINKER_CREATED) == 0)
2701 continue;
2702
2703 /* It's OK to base decisions on the section name, because none
2704 of the dynobj section names depend upon the input files. */
2705 name = bfd_get_section_name (dynobj, s);
2706
2707 strip = false;
2708
2709 if (strcmp (name, ".plt") == 0)
2710 {
2711 if (s->_raw_size == 0)
2712 {
2713 /* Strip this section if we don't need it; see the
2714 comment below. */
2715 strip = true;
2716 }
2717 else
2718 {
2719 /* Remember whether there is a PLT. */
2720 plt = true;
2721 }
2722 }
2723 else if (strncmp (name, ".rel", 4) == 0)
2724 {
2725 if (s->_raw_size == 0)
2726 {
2727 /* If we don't need this section, strip it from the
2728 output file. This is mostly to handle .rel.bss and
2729 .rel.plt. We must create both sections in
2730 create_dynamic_sections, because they must be created
2731 before the linker maps input sections to output
2732 sections. The linker does that before
2733 adjust_dynamic_symbol is called, and it is that
2734 function which decides whether anything needs to go
2735 into these sections. */
2736 strip = true;
2737 }
2738 else
2739 {
2740 asection * target;
2741
2742 /* Remember whether there are any reloc sections other
2743 than .rel.plt. */
2744 if (strcmp (name, ".rel.plt") != 0)
2745 {
2746 const char *outname;
2747
2748 relocs = true;
2749
2750 /* If this relocation section applies to a read only
2751 section, then we probably need a DT_TEXTREL
2752 entry. The entries in the .rel.plt section
2753 really apply to the .got section, which we
2754 created ourselves and so know is not readonly. */
2755 outname = bfd_get_section_name (output_bfd,
2756 s->output_section);
2757 target = bfd_get_section_by_name (output_bfd, outname + 4);
2758 if (target != NULL
2759 && (target->flags & SEC_READONLY) != 0
2760 && (target->flags & SEC_ALLOC) != 0)
2761 reltext = true;
2762 }
2763
2764 /* We use the reloc_count field as a counter if we need
2765 to copy relocs into the output file. */
2766 s->reloc_count = 0;
2767 }
2768 }
2769 else if (strncmp (name, ".got", 4) != 0)
2770 {
2771 /* It's not one of our sections, so don't allocate space. */
2772 continue;
2773 }
2774
2775 if (strip)
2776 {
2777 asection ** spp;
2778
2779 for (spp = &s->output_section->owner->sections;
2780 *spp != s->output_section;
2781 spp = &(*spp)->next)
2782 ;
2783 *spp = s->output_section->next;
2784 --s->output_section->owner->section_count;
2785
2786 continue;
2787 }
2788
2789 /* Allocate memory for the section contents. */
2790 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2791 if (s->contents == NULL && s->_raw_size != 0)
2792 return false;
2793 }
2794
2795 if (elf_hash_table (info)->dynamic_sections_created)
2796 {
2797 /* Add some entries to the .dynamic section. We fill in the
2798 values later, in elf32_arm_finish_dynamic_sections, but we
2799 must add the entries now so that we get the correct size for
2800 the .dynamic section. The DT_DEBUG entry is filled in by the
2801 dynamic linker and used by the debugger. */
2802 if (! info->shared)
2803 {
2804 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
2805 return false;
2806 }
2807
2808 if (plt)
2809 {
2810 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
2811 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2812 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL)
2813 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
2814 return false;
2815 }
2816
2817 if (relocs)
2818 {
2819 if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
2820 || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
2821 || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
2822 sizeof (Elf32_External_Rel)))
2823 return false;
2824 }
2825
2826 if (reltext)
2827 {
2828 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
2829 return false;
2830 }
2831 }
2832
2833 return true;
2834}
2835
2836/* This function is called via elf32_arm_link_hash_traverse if we are
2837 creating a shared object with -Bsymbolic. It discards the space
2838 allocated to copy PC relative relocs against symbols which are
2839 defined in regular objects. We allocated space for them in the
2840 check_relocs routine, but we won't fill them in in the
2841 relocate_section routine. */
2842
2843static boolean
2844elf32_arm_discard_copies (h, ignore)
2845 struct elf32_arm_link_hash_entry * h;
5f771d47 2846 PTR ignore ATTRIBUTE_UNUSED;
252b5132
RH		 2847{
2848 struct elf32_arm_pcrel_relocs_copied * s;
2849
2850 /* We only discard relocs for symbols defined in a regular object. */
2851 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2852 return true;
2853
2854 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
2855 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
2856
2857 return true;
2858}
2859
2860/* Finish up dynamic symbol handling. We set the contents of various
2861 dynamic sections here. */
2862
2863static boolean
2864elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
2865 bfd * output_bfd;
2866 struct bfd_link_info * info;
2867 struct elf_link_hash_entry * h;
2868 Elf_Internal_Sym * sym;
2869{
2870 bfd * dynobj;
2871
2872 dynobj = elf_hash_table (info)->dynobj;
2873
2874 if (h->plt.offset != (bfd_vma) -1)
2875 {
2876 asection * splt;
2877 asection * sgot;
2878 asection * srel;
2879 bfd_vma plt_index;
2880 bfd_vma got_offset;
2881 Elf_Internal_Rel rel;
2882
2883 /* This symbol has an entry in the procedure linkage table. Set
2884 it up. */
2885
2886 BFD_ASSERT (h->dynindx != -1);
2887
2888 splt = bfd_get_section_by_name (dynobj, ".plt");
2889 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2890 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
2891 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
2892
2893 /* Get the index in the procedure linkage table which
2894 corresponds to this symbol. This is the index of this symbol
2895 in all the symbols for which we are making plt entries. The
2896 first entry in the procedure linkage table is reserved. */
2897 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2898
2899 /* Get the offset into the .got table of the entry that
2900 corresponds to this function. Each .got entry is 4 bytes.
2901 The first three are reserved. */
2902 got_offset = (plt_index + 3) * 4;
2903
2904 /* Fill in the entry in the procedure linkage table. */
2905 memcpy (splt->contents + h->plt.offset,
2906 elf32_arm_plt_entry,
2907 PLT_ENTRY_SIZE);
2908 bfd_put_32 (output_bfd,
2909 (sgot->output_section->vma
2910 + sgot->output_offset
f21f3fe0 2911 + got_offset
252b5132
RH		 2912 - splt->output_section->vma
2913 - splt->output_offset
2914 - h->plt.offset - 12),
2915 splt->contents + h->plt.offset + 12);
2916
2917 /* Fill in the entry in the global offset table. */
2918 bfd_put_32 (output_bfd,
2919 (splt->output_section->vma
2920 + splt->output_offset),
2921 sgot->contents + got_offset);
2922
2923 /* Fill in the entry in the .rel.plt section. */
2924 rel.r_offset = (sgot->output_section->vma
2925 + sgot->output_offset
2926 + got_offset);
2927 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
2928 bfd_elf32_swap_reloc_out (output_bfd, &rel,
2929 ((Elf32_External_Rel *) srel->contents
2930 + plt_index));
2931
2932 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2933 {
2934 /* Mark the symbol as undefined, rather than as defined in
2935 the .plt section. Leave the value alone. */
2936 sym->st_shndx = SHN_UNDEF;
2937 }
2938 }
2939
2940 if (h->got.offset != (bfd_vma) -1)
2941 {
2942 asection * sgot;
2943 asection * srel;
2944 Elf_Internal_Rel rel;
2945
2946 /* This symbol has an entry in the global offset table. Set it
2947 up. */
f21f3fe0 2948
252b5132
RH		 2949 sgot = bfd_get_section_by_name (dynobj, ".got");
2950 srel = bfd_get_section_by_name (dynobj, ".rel.got");
2951 BFD_ASSERT (sgot != NULL && srel != NULL);
2952
2953 rel.r_offset = (sgot->output_section->vma
2954 + sgot->output_offset
2955 + (h->got.offset &~ 1));
2956
2957 /* If this is a -Bsymbolic link, and the symbol is defined
2958 locally, we just want to emit a RELATIVE reloc. The entry in
2959 the global offset table will already have been initialized in
2960 the relocate_section function. */
2961 if (info->shared
2962 && (info->symbolic || h->dynindx == -1)
2963 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2964 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2965 else
2966 {
2967 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2968 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
2969 }
2970
2971 bfd_elf32_swap_reloc_out (output_bfd, &rel,
2972 ((Elf32_External_Rel *) srel->contents
2973 + srel->reloc_count));
2974 ++srel->reloc_count;
2975 }
2976
2977 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2978 {
2979 asection * s;
2980 Elf_Internal_Rel rel;
2981
2982 /* This symbol needs a copy reloc. Set it up. */
2983
2984 BFD_ASSERT (h->dynindx != -1
2985 && (h->root.type == bfd_link_hash_defined
2986 || h->root.type == bfd_link_hash_defweak));
2987
2988 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2989 ".rel.bss");
2990 BFD_ASSERT (s != NULL);
2991
2992 rel.r_offset = (h->root.u.def.value
2993 + h->root.u.def.section->output_section->vma
2994 + h->root.u.def.section->output_offset);
2995 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
2996 bfd_elf32_swap_reloc_out (output_bfd, &rel,
2997 ((Elf32_External_Rel *) s->contents
2998 + s->reloc_count));
2999 ++s->reloc_count;
3000 }
3001
3002 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3003 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3004 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3005 sym->st_shndx = SHN_ABS;
3006
3007 return true;
3008}
3009
3010/* Finish up the dynamic sections. */
3011
3012static boolean
3013elf32_arm_finish_dynamic_sections (output_bfd, info)
3014 bfd * output_bfd;
3015 struct bfd_link_info * info;
3016{
3017 bfd * dynobj;
3018 asection * sgot;
3019 asection * sdyn;
3020
3021 dynobj = elf_hash_table (info)->dynobj;
3022
3023 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3024 BFD_ASSERT (sgot != NULL);
3025 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3026
3027 if (elf_hash_table (info)->dynamic_sections_created)
3028 {
3029 asection *splt;
3030 Elf32_External_Dyn *dyncon, *dynconend;
3031
3032 splt = bfd_get_section_by_name (dynobj, ".plt");
3033 BFD_ASSERT (splt != NULL && sdyn != NULL);
3034
3035 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3036 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3037 for (; dyncon < dynconend; dyncon++)
3038 {
3039 Elf_Internal_Dyn dyn;
3040 const char * name;
3041 asection * s;
3042
3043 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3044
3045 switch (dyn.d_tag)
3046 {
3047 default:
3048 break;
3049
3050 case DT_PLTGOT:
3051 name = ".got";
3052 goto get_vma;
3053 case DT_JMPREL:
3054 name = ".rel.plt";
3055 get_vma:
3056 s = bfd_get_section_by_name (output_bfd, name);
3057 BFD_ASSERT (s != NULL);
3058 dyn.d_un.d_ptr = s->vma;
3059 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3060 break;
3061
3062 case DT_PLTRELSZ:
3063 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3064 BFD_ASSERT (s != NULL);
3065 if (s->_cooked_size != 0)
3066 dyn.d_un.d_val = s->_cooked_size;
3067 else
3068 dyn.d_un.d_val = s->_raw_size;
3069 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3070 break;
3071
3072 case DT_RELSZ:
3073 /* My reading of the SVR4 ABI indicates that the
3074 procedure linkage table relocs (DT_JMPREL) should be
3075 included in the overall relocs (DT_REL). This is
3076 what Solaris does. However, UnixWare can not handle
3077 that case. Therefore, we override the DT_RELSZ entry
3078 here to make it not include the JMPREL relocs. Since
3079 the linker script arranges for .rel.plt to follow all
3080 other relocation sections, we don't have to worry
3081 about changing the DT_REL entry. */
3082 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3083 if (s != NULL)
3084 {
3085 if (s->_cooked_size != 0)
3086 dyn.d_un.d_val -= s->_cooked_size;
3087 else
3088 dyn.d_un.d_val -= s->_raw_size;
3089 }
3090 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3091 break;
3092 }
3093 }
3094
3095 /* Fill in the first entry in the procedure linkage table. */
3096 if (splt->_raw_size > 0)
3097 memcpy (splt->contents, elf32_arm_plt0_entry, PLT_ENTRY_SIZE);
3098
3099 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3100 really seem like the right value. */
3101 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3102 }
3103
3104 /* Fill in the first three entries in the global offset table. */
3105 if (sgot->_raw_size > 0)
3106 {
3107 if (sdyn == NULL)
3108 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3109 else
3110 bfd_put_32 (output_bfd,
3111 sdyn->output_section->vma + sdyn->output_offset,
3112 sgot->contents);
3113 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3114 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3115 }
3116
3117 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3118
3119 return true;
3120}
3121
ba96a88f
NC		 3122static void
3123elf32_arm_post_process_headers (abfd, link_info)
3124 bfd * abfd;
5f771d47 3125 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f
NC		 3126{
3127 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
3128
3129 i_ehdrp = elf_elfheader (abfd);
3130
3131 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3132 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3133}
3134
3135
252b5132
RH		 3136#define ELF_ARCH bfd_arch_arm
3137#define ELF_MACHINE_CODE EM_ARM
f21f3fe0 3138#define ELF_MAXPAGESIZE 0x8000
252b5132
RH		 3139
3140
3141#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3142#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
3143#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3144#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3145#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
3146#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
3147#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3148
3149#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3150#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3151#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3152#define elf_backend_check_relocs elf32_arm_check_relocs
3153#define elf_backend_relocate_section elf32_arm_relocate_section
3154#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3155#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3156#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3157#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3158#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 3159#define elf_backend_post_process_headers elf32_arm_post_process_headers
252b5132
RH		 3160
3161#define elf_backend_can_gc_sections 1
3162#define elf_backend_plt_readonly 1
3163#define elf_backend_want_got_plt 1
3164#define elf_backend_want_plt_sym 0
3165
04f7c78d
NC		 3166#define elf_backend_got_header_size 12
3167#define elf_backend_plt_header_size PLT_ENTRY_SIZE
3168
252b5132 3169#include "elf32-target.h"
A mirror of the official binutils-gdb repository