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[deliverable/binutils-gdb.git] / bfd / elf32-arm.h
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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
98c1d4aa
NC		 1584#ifdef USE_REL
1585/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1586static void
1587arm_add_to_rel (abfd, address, howto, increment)
1588 bfd * abfd;
1589 bfd_vma address;
1590 reloc_howto_type * howto;
1591 bfd_signed_vma increment;
1592{
1593 bfd_vma contents;
1594 bfd_signed_vma addend;
1595
1596 contents = bfd_get_32 (abfd, address);
1597
1598 /* Get the (signed) value from the instruction. */
1599 addend = contents & howto->src_mask;
1600 if (addend & ((howto->src_mask + 1) >> 1))
1601 {
1602 bfd_signed_vma mask;
1603
1604 mask = -1;
1605 mask &= ~ howto->src_mask;
1606 addend |= mask;
1607 }
1608
1609 /* Add in the increment, (which is a byte value). */
1610 addend <<= howto->size;
1611 addend += increment;
1612
1613 /* Should we check for overflow here ? */
1614
1615 /* Drop any undesired bits. */
1616 addend >>= howto->rightshift;
1617
1618 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1619
1620 bfd_put_32 (abfd, contents, address);
1621}
1622#endif /* USE_REL */
252b5132
RH		 1623
1624/* Relocate an ARM ELF section. */
1625static boolean
1626elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1627 contents, relocs, local_syms, local_sections)
1628 bfd * output_bfd;
1629 struct bfd_link_info * info;
1630 bfd * input_bfd;
1631 asection * input_section;
1632 bfd_byte * contents;
1633 Elf_Internal_Rela * relocs;
1634 Elf_Internal_Sym * local_syms;
1635 asection ** local_sections;
1636{
1637 Elf_Internal_Shdr * symtab_hdr;
1638 struct elf_link_hash_entry ** sym_hashes;
1639 Elf_Internal_Rela * rel;
1640 Elf_Internal_Rela * relend;
1641 const char * name;
1642
1643 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1644 sym_hashes = elf_sym_hashes (input_bfd);
1645
1646 rel = relocs;
1647 relend = relocs + input_section->reloc_count;
1648 for (; rel < relend; rel++)
1649 {
ba96a88f
NC		 1650 int r_type;
1651 reloc_howto_type * howto;
1652 unsigned long r_symndx;
1653 Elf_Internal_Sym * sym;
1654 asection * sec;
252b5132 1655 struct elf_link_hash_entry * h;
ba96a88f
NC		 1656 bfd_vma relocation;
1657 bfd_reloc_status_type r;
1658 arelent bfd_reloc;
f21f3fe0 1659
252b5132 1660 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 1661 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1662
ba96a88f
NC		 1663 if ( r_type == R_ARM_GNU_VTENTRY
1664 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 1665 continue;
1666
ba96a88f
NC		 1667 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1668 howto = bfd_reloc.howto;
252b5132
RH		 1669
1670 if (info->relocateable)
1671 {
1672 /* This is a relocateable link. We don't have to change
1673 anything, unless the reloc is against a section symbol,
1674 in which case we have to adjust according to where the
1675 section symbol winds up in the output section. */
1676 if (r_symndx < symtab_hdr->sh_info)
1677 {
1678 sym = local_syms + r_symndx;
1679 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1680 {
1681 sec = local_sections[r_symndx];
1682#ifdef USE_REL
98c1d4aa
NC		 1683 arm_add_to_rel (input_bfd, contents + rel->r_offset,
1684 howto, sec->output_offset + sym->st_value);
252b5132
RH		 1685#else
1686 rel->r_addend += (sec->output_offset + sym->st_value)
1687 >> howto->rightshift;
1688#endif
1689 }
1690 }
1691
1692 continue;
1693 }
1694
1695 /* This is a final link. */
1696 h = NULL;
1697 sym = NULL;
1698 sec = NULL;
1699 if (r_symndx < symtab_hdr->sh_info)
1700 {
1701 sym = local_syms + r_symndx;
1702 sec = local_sections[r_symndx];
1703 relocation = (sec->output_section->vma
1704 + sec->output_offset
1705 + sym->st_value);
1706 }
1707 else
1708 {
1709 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1710 while (h->root.type == bfd_link_hash_indirect
1711 || h->root.type == bfd_link_hash_warning)
1712 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1713 if (h->root.type == bfd_link_hash_defined
1714 || h->root.type == bfd_link_hash_defweak)
1715 {
780a67af 1716 int relocation_needed = 1;
f21f3fe0 1717
780a67af 1718 sec = h->root.u.def.section;
f21f3fe0 1719
252b5132 1720 /* In these cases, we don't need the relocation value.
f21f3fe0 1721 We check specially because in some obscure cases
252b5132
RH		 1722 sec->output_section will be NULL. */
1723 switch (r_type)
1724 {
1725 case R_ARM_PC24:
1726 case R_ARM_ABS32:
1727 if (info->shared
1728 && (
1729 (!info->symbolic && h->dynindx != -1)
97eaf9de 1730 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132
RH		 1731 )
1732 && ((input_section->flags & SEC_ALLOC) != 0)
1733 )
780a67af 1734 relocation_needed = 0;
252b5132 1735 break;
f21f3fe0 1736
252b5132 1737 case R_ARM_GOTPC:
780a67af 1738 relocation_needed = 0;
252b5132 1739 break;
f21f3fe0 1740
252b5132
RH		 1741 case R_ARM_GOT32:
1742 if (elf_hash_table(info)->dynamic_sections_created
1743 && (!info->shared
1744 || (!info->symbolic && h->dynindx != -1)
1745 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1746 )
1747 )
780a67af 1748 relocation_needed = 0;
252b5132 1749 break;
f21f3fe0 1750
252b5132
RH		 1751 case R_ARM_PLT32:
1752 if (h->plt.offset != (bfd_vma)-1)
780a67af 1753 relocation_needed = 0;
252b5132 1754 break;
f21f3fe0 1755
252b5132
RH		 1756 default:
1757 if (sec->output_section == NULL)
1758 {
1759 (*_bfd_error_handler)
1760 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1761 bfd_get_filename (input_bfd), h->root.root.string,
1762 bfd_get_section_name (input_bfd, input_section));
780a67af 1763 relocation_needed = 0;
252b5132
RH		 1764 }
1765 }
780a67af
NC		 1766
1767 if (relocation_needed)
1768 relocation = h->root.u.def.value
1769 + sec->output_section->vma
1770 + sec->output_offset;
1771 else
1772 relocation = 0;
252b5132
RH		 1773 }
1774 else if (h->root.type == bfd_link_hash_undefweak)
1775 relocation = 0;
a72747a3
NC		 1776 else if (info->shared && !info->symbolic && !info->no_undefined)
1777 relocation = 0;
252b5132
RH		 1778 else
1779 {
1780 if (!((*info->callbacks->undefined_symbol)
1781 (info, h->root.root.string, input_bfd,
1782 input_section, rel->r_offset)))
1783 return false;
1784 relocation = 0;
1785 }
1786 }
1787
1788 if (h != NULL)
1789 name = h->root.root.string;
1790 else
1791 {
1792 name = (bfd_elf_string_from_elf_section
1793 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1794 if (name == NULL || *name == '\0')
1795 name = bfd_section_name (input_bfd, sec);
1796 }
f21f3fe0 1797
252b5132
RH		 1798 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1799 input_section, contents, rel,
1800 relocation, info, sec, name,
1801 (h ? ELF_ST_TYPE (h->type) :
780a67af 1802 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH		 1803
1804 if (r != bfd_reloc_ok)
1805 {
1806 const char * msg = (const char *) 0;
1807
1808 switch (r)
1809 {
1810 case bfd_reloc_overflow:
1811 if (!((*info->callbacks->reloc_overflow)
1812 (info, name, howto->name, (bfd_vma) 0,
1813 input_bfd, input_section, rel->r_offset)))
1814 return false;
1815 break;
1816
1817 case bfd_reloc_undefined:
1818 if (!((*info->callbacks->undefined_symbol)
1819 (info, name, input_bfd, input_section,
1820 rel->r_offset)))
1821 return false;
1822 break;
1823
1824 case bfd_reloc_outofrange:
1825 msg = _ ("internal error: out of range error");
1826 goto common_error;
1827
1828 case bfd_reloc_notsupported:
1829 msg = _ ("internal error: unsupported relocation error");
1830 goto common_error;
1831
1832 case bfd_reloc_dangerous:
1833 msg = _ ("internal error: dangerous error");
1834 goto common_error;
1835
1836 default:
1837 msg = _ ("internal error: unknown error");
1838 /* fall through */
1839
1840 common_error:
1841 if (!((*info->callbacks->warning)
1842 (info, msg, name, input_bfd, input_section,
1843 rel->r_offset)))
1844 return false;
1845 break;
1846 }
1847 }
1848 }
1849
1850 return true;
1851}
1852
1853/* Function to keep ARM specific flags in the ELF header. */
1854static boolean
1855elf32_arm_set_private_flags (abfd, flags)
1856 bfd *abfd;
1857 flagword flags;
1858{
1859 if (elf_flags_init (abfd)
1860 && elf_elfheader (abfd)->e_flags != flags)
1861 {
1862 if (flags & EF_INTERWORK)
1863 _bfd_error_handler (_ ("\
1864Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
1865 bfd_get_filename (abfd));
1866 else
1867 _bfd_error_handler (_ ("\
1868Warning: Clearing the interwork flag of %s due to outside request"),
1869 bfd_get_filename (abfd));
1870 }
1871 else
1872 {
1873 elf_elfheader (abfd)->e_flags = flags;
1874 elf_flags_init (abfd) = true;
1875 }
1876
1877 return true;
1878}
1879
1880/* Copy backend specific data from one object module to another */
1881static boolean
1882elf32_arm_copy_private_bfd_data (ibfd, obfd)
1883 bfd *ibfd;
1884 bfd *obfd;
1885{
1886 flagword in_flags;
1887 flagword out_flags;
1888
1889 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1890 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1891 return true;
1892
1893 in_flags = elf_elfheader (ibfd)->e_flags;
1894 out_flags = elf_elfheader (obfd)->e_flags;
1895
1896 if (elf_flags_init (obfd) && in_flags != out_flags)
1897 {
1898 /* Cannot mix PIC and non-PIC code. */
1899 if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
1900 return false;
1901
1902 /* Cannot mix APCS26 and APCS32 code. */
1903 if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
1904 return false;
1905
1906 /* Cannot mix float APCS and non-float APCS code. */
1907 if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
1908 return false;
1909
1910 /* If the src and dest have different interworking flags
1911 then turn off the interworking bit. */
1912 if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
1913 {
1914 if (out_flags & EF_INTERWORK)
1915 _bfd_error_handler (_ ("\
1916Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
1917 bfd_get_filename (obfd), bfd_get_filename (ibfd));
1918
1919 in_flags &= ~EF_INTERWORK;
1920 }
1921 }
1922
1923 elf_elfheader (obfd)->e_flags = in_flags;
1924 elf_flags_init (obfd) = true;
1925
1926 return true;
1927}
1928
1929/* Merge backend specific data from an object file to the output
1930 object file when linking. */
1931static boolean
1932elf32_arm_merge_private_bfd_data (ibfd, obfd)
1933 bfd *ibfd;
1934 bfd *obfd;
1935{
1936 flagword out_flags;
1937 flagword in_flags;
1938
1939 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1940 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1941 return true;
1942
1943 /* Check if we have the same endianess */
1944 if ( ibfd->xvec->byteorder != obfd->xvec->byteorder
1945 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
1946 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1947 {
1948 (*_bfd_error_handler)
1949 (_("%s: compiled for a %s endian system and target is %s endian"),
1950 bfd_get_filename (ibfd),
1951 bfd_big_endian (ibfd) ? "big" : "little",
1952 bfd_big_endian (obfd) ? "big" : "little");
1953
1954 bfd_set_error (bfd_error_wrong_format);
1955 return false;
1956 }
1957
1958 /* The input BFD must have had its flags initialised. */
1959 /* The following seems bogus to me -- The flags are initialized in
1960 the assembler but I don't think an elf_flags_init field is
1961 written into the object */
1962 /* BFD_ASSERT (elf_flags_init (ibfd)); */
1963
1964 in_flags = elf_elfheader (ibfd)->e_flags;
1965 out_flags = elf_elfheader (obfd)->e_flags;
1966
1967 if (!elf_flags_init (obfd))
1968 {
1969 /* If the input is the default architecture then do not
1970 bother setting the flags for the output architecture,
1971 instead allow future merges to do this. If no future
1972 merges ever set these flags then they will retain their
1973 unitialised values, which surprise surprise, correspond
1974 to the default values. */
1975 if (bfd_get_arch_info (ibfd)->the_default)
1976 return true;
1977
1978 elf_flags_init (obfd) = true;
1979 elf_elfheader (obfd)->e_flags = in_flags;
1980
1981 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1982 && bfd_get_arch_info (obfd)->the_default)
1983 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
1984
1985 return true;
1986 }
1987
1988 /* Check flag compatibility. */
1989 if (in_flags == out_flags)
1990 return true;
1991
1992 /* Complain about various flag mismatches. */
1993
1994 if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
1995 _bfd_error_handler (_ ("\
1996Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
1997 bfd_get_filename (ibfd),
1998 in_flags & EF_APCS_26 ? 26 : 32,
1999 bfd_get_filename (obfd),
2000 out_flags & EF_APCS_26 ? 26 : 32);
2001
2002 if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
2003 _bfd_error_handler (_ ("\
2004Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
2005 bfd_get_filename (ibfd),
2006 in_flags & EF_APCS_FLOAT ? _ ("float") : _ ("integer"),
2007 bfd_get_filename (obfd),
2008 out_flags & EF_APCS_26 ? _ ("float") : _ ("integer"));
2009
2010 if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
2011 _bfd_error_handler (_ ("\
2012Error: %s is compiled as position %s code, whereas %s is not"),
2013 bfd_get_filename (ibfd),
2014 in_flags & EF_PIC ? _ ("independent") : _ ("dependent"),
2015 bfd_get_filename (obfd));
2016
2017 /* Interworking mismatch is only a warning. */
2018 if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
2019 {
2020 _bfd_error_handler (_ ("\
2021Warning: %s %s interworking, whereas %s %s"),
2022 bfd_get_filename (ibfd),
2023 in_flags & EF_INTERWORK ? _ ("supports") : _ ("does not support"),
2024 bfd_get_filename (obfd),
2025 out_flags & EF_INTERWORK ? _ ("does not") : _ ("does"));
2026 return true;
2027 }
2028
2029 return false;
2030}
2031
2032/* Display the flags field */
2033static boolean
2034elf32_arm_print_private_bfd_data (abfd, ptr)
2035 bfd *abfd;
2036 PTR ptr;
2037{
2038 FILE *file = (FILE *) ptr;
2039
2040 BFD_ASSERT (abfd != NULL && ptr != NULL);
2041
2042 /* Print normal ELF private data. */
2043 _bfd_elf_print_private_bfd_data (abfd, ptr);
2044
2045 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
2046
2047 /* xgettext:c-format */
2048 fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2049
2050 if (elf_elfheader (abfd)->e_flags & EF_INTERWORK)
2051 fprintf (file, _ (" [interworking enabled]"));
2052 else
2053 fprintf (file, _ (" [interworking not enabled]"));
2054
2055 if (elf_elfheader (abfd)->e_flags & EF_APCS_26)
2056 fprintf (file, _ (" [APCS-26]"));
2057 else
2058 fprintf (file, _ (" [APCS-32]"));
2059
2060 if (elf_elfheader (abfd)->e_flags & EF_APCS_FLOAT)
2061 fprintf (file, _ (" [floats passed in float registers]"));
2062 else
2063 fprintf (file, _ (" [floats passed in integer registers]"));
2064
2065 if (elf_elfheader (abfd)->e_flags & EF_PIC)
2066 fprintf (file, _ (" [position independent]"));
2067 else
2068 fprintf (file, _ (" [absolute position]"));
2069
2070 fputc ('\n', file);
2071
2072 return true;
2073}
2074
2075static int
2076elf32_arm_get_symbol_type (elf_sym, type)
2077 Elf_Internal_Sym * elf_sym;
2078 int type;
2079{
2080 if (ELF_ST_TYPE (elf_sym->st_info) == STT_ARM_TFUNC)
2081 return ELF_ST_TYPE (elf_sym->st_info);
2082 else
2083 return type;
2084}
f21f3fe0 2085
252b5132
RH		 2086static asection *
2087elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2088 bfd *abfd;
5f771d47 2089 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2090 Elf_Internal_Rela *rel;
2091 struct elf_link_hash_entry *h;
2092 Elf_Internal_Sym *sym;
2093{
2094 if (h != NULL)
2095 {
2096 switch (ELF32_R_TYPE (rel->r_info))
2097 {
2098 case R_ARM_GNU_VTINHERIT:
2099 case R_ARM_GNU_VTENTRY:
2100 break;
2101
2102 default:
2103 switch (h->root.type)
2104 {
2105 case bfd_link_hash_defined:
2106 case bfd_link_hash_defweak:
2107 return h->root.u.def.section;
2108
2109 case bfd_link_hash_common:
2110 return h->root.u.c.p->section;
e049a0de
ILT		 2111
2112 default:
2113 break;
252b5132
RH		 2114 }
2115 }
2116 }
2117 else
2118 {
2119 if (!(elf_bad_symtab (abfd)
2120 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
2121 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
2122 && sym->st_shndx != SHN_COMMON))
2123 {
2124 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2125 }
2126 }
2127 return NULL;
2128}
2129
780a67af
NC		 2130/* Update the got entry reference counts for the section being removed. */
2131
252b5132
RH		 2132static boolean
2133elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 2134 bfd *abfd ATTRIBUTE_UNUSED;
2135 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2136 asection *sec ATTRIBUTE_UNUSED;
2137 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2138{
780a67af 2139 /* We don't support garbage collection of GOT and PLT relocs yet. */
252b5132
RH		 2140 return true;
2141}
2142
780a67af
NC		 2143/* Look through the relocs for a section during the first phase. */
2144
252b5132
RH		 2145static boolean
2146elf32_arm_check_relocs (abfd, info, sec, relocs)
2147 bfd * abfd;
2148 struct bfd_link_info * info;
2149 asection * sec;
2150 const Elf_Internal_Rela * relocs;
2151{
2152 Elf_Internal_Shdr * symtab_hdr;
2153 struct elf_link_hash_entry ** sym_hashes;
2154 struct elf_link_hash_entry ** sym_hashes_end;
2155 const Elf_Internal_Rela * rel;
2156 const Elf_Internal_Rela * rel_end;
2157 bfd * dynobj;
2158 asection * sgot, *srelgot, *sreloc;
2159 bfd_vma * local_got_offsets;
dece4658 2160
252b5132
RH		 2161 if (info->relocateable)
2162 return true;
dece4658 2163
252b5132 2164 sgot = srelgot = sreloc = NULL;
dece4658 2165
252b5132
RH		 2166 dynobj = elf_hash_table (info)->dynobj;
2167 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2168
252b5132
RH		 2169 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2170 sym_hashes = elf_sym_hashes (abfd);
2171 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
2172 if (!elf_bad_symtab (abfd))
2173 sym_hashes_end -= symtab_hdr->sh_info;
dece4658 2174
252b5132
RH		 2175 rel_end = relocs + sec->reloc_count;
2176 for (rel = relocs; rel < rel_end; rel++)
2177 {
2178 struct elf_link_hash_entry *h;
2179 unsigned long r_symndx;
dece4658 2180
252b5132
RH		 2181 r_symndx = ELF32_R_SYM (rel->r_info);
2182 if (r_symndx < symtab_hdr->sh_info)
2183 h = NULL;
2184 else
2185 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
dece4658 2186
252b5132
RH		 2187 /* Some relocs require a global offset table. */
2188 if (dynobj == NULL)
2189 {
2190 switch (ELF32_R_TYPE (rel->r_info))
2191 {
2192 case R_ARM_GOT32:
2193 case R_ARM_GOTOFF:
2194 case R_ARM_GOTPC:
2195 elf_hash_table (info)->dynobj = dynobj = abfd;
2196 if (! _bfd_elf_create_got_section (dynobj, info))
2197 return false;
2198 break;
2199
2200 default:
2201 break;
2202 }
2203 }
2204
2205 switch (ELF32_R_TYPE (rel->r_info))
2206 {
2207 case R_ARM_GOT32:
2208 /* This symbol requires a global offset table entry. */
2209 if (sgot == NULL)
2210 {
2211 sgot = bfd_get_section_by_name (dynobj, ".got");
2212 BFD_ASSERT (sgot != NULL);
2213 }
2214
2215 /* Get the got relocation section if necessary. */
2216 if (srelgot == NULL
2217 && (h != NULL || info->shared))
2218 {
2219 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
dece4658 2220
252b5132
RH		 2221 /* If no got relocation section, make one and initialize. */
2222 if (srelgot == NULL)
2223 {
2224 srelgot = bfd_make_section (dynobj, ".rel.got");
2225 if (srelgot == NULL
2226 || ! bfd_set_section_flags (dynobj, srelgot,
2227 (SEC_ALLOC
2228 | SEC_LOAD
2229 | SEC_HAS_CONTENTS
2230 | SEC_IN_MEMORY
2231 | SEC_LINKER_CREATED
2232 | SEC_READONLY))
2233 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2234 return false;
2235 }
2236 }
2237
2238 if (h != NULL)
2239 {
2240 if (h->got.offset != (bfd_vma) -1)
2241 /* We have already allocated space in the .got. */
2242 break;
f21f3fe0 2243
252b5132
RH		 2244 h->got.offset = sgot->_raw_size;
2245
2246 /* Make sure this symbol is output as a dynamic symbol. */
2247 if (h->dynindx == -1)
2248 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2249 return false;
2250
2251 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2252 }
2253 else
2254 {
2255 /* This is a global offset table entry for a local
2256 symbol. */
2257 if (local_got_offsets == NULL)
2258 {
2259 size_t size;
2260 register unsigned int i;
2261
2262 size = symtab_hdr->sh_info * sizeof (bfd_vma);
2263 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2264 if (local_got_offsets == NULL)
2265 return false;
2266 elf_local_got_offsets (abfd) = local_got_offsets;
2267 for (i = 0; i < symtab_hdr->sh_info; i++)
2268 local_got_offsets[i] = (bfd_vma) -1;
2269 }
f21f3fe0 2270
252b5132
RH		 2271 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2272 /* We have already allocated space in the .got. */
2273 break;
2274
2275 local_got_offsets[r_symndx] = sgot->_raw_size;
2276
2277 if (info->shared)
2278 /* If we are generating a shared object, we need to
2279 output a R_ARM_RELATIVE reloc so that the dynamic
2280 linker can adjust this GOT entry. */
2281 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2282 }
2283
2284 sgot->_raw_size += 4;
2285 break;
2286
2287 case R_ARM_PLT32:
2288 /* This symbol requires a procedure linkage table entry. We
2289 actually build the entry in adjust_dynamic_symbol,
2290 because this might be a case of linking PIC code which is
2291 never referenced by a dynamic object, in which case we
2292 don't need to generate a procedure linkage table entry
2293 after all. */
2294
2295 /* If this is a local symbol, we resolve it directly without
2296 creating a procedure linkage table entry. */
2297 if (h == NULL)
2298 continue;
2299
2300 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2301 break;
2302
2303 case R_ARM_ABS32:
2304 case R_ARM_REL32:
2305 case R_ARM_PC24:
2306 /* If we are creating a shared library, and this is a reloc
2307 against a global symbol, or a non PC relative reloc
2308 against a local symbol, then we need to copy the reloc
2309 into the shared library. However, if we are linking with
2310 -Bsymbolic, we do not need to copy a reloc against a
2311 global symbol which is defined in an object we are
2312 including in the link (i.e., DEF_REGULAR is set). At
2313 this point we have not seen all the input files, so it is
2314 possible that DEF_REGULAR is not set now but will be set
2315 later (it is never cleared). We account for that
2316 possibility below by storing information in the
2317 pcrel_relocs_copied field of the hash table entry. */
2318 if (info->shared
2319 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2320 || (h != NULL
2321 && (! info->symbolic
2322 || (h->elf_link_hash_flags
2323 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2324 {
2325 /* When creating a shared object, we must copy these
2326 reloc types into the output file. We create a reloc
2327 section in dynobj and make room for this reloc. */
2328 if (sreloc == NULL)
2329 {
2330 const char * name;
2331
2332 name = (bfd_elf_string_from_elf_section
2333 (abfd,
2334 elf_elfheader (abfd)->e_shstrndx,
2335 elf_section_data (sec)->rel_hdr.sh_name));
2336 if (name == NULL)
2337 return false;
2338
2339 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2340 && strcmp (bfd_get_section_name (abfd, sec),
2341 name + 4) == 0);
2342
2343 sreloc = bfd_get_section_by_name (dynobj, name);
2344 if (sreloc == NULL)
2345 {
2346 flagword flags;
2347
2348 sreloc = bfd_make_section (dynobj, name);
2349 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2350 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2351 if ((sec->flags & SEC_ALLOC) != 0)
2352 flags |= SEC_ALLOC | SEC_LOAD;
2353 if (sreloc == NULL
2354 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2355 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2356 return false;
2357 }
2358 }
2359
2360 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2361 /* If we are linking with -Bsymbolic, and this is a
2362 global symbol, we count the number of PC relative
2363 relocations we have entered for this symbol, so that
2364 we can discard them again if the symbol is later
2365 defined by a regular object. Note that this function
2366 is only called if we are using an elf_i386 linker
2367 hash table, which means that h is really a pointer to
2368 an elf_i386_link_hash_entry. */
2369 if (h != NULL && info->symbolic
2370 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2371 {
2372 struct elf32_arm_link_hash_entry * eh;
2373 struct elf32_arm_pcrel_relocs_copied * p;
2374
2375 eh = (struct elf32_arm_link_hash_entry *) h;
2376
2377 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2378 if (p->section == sreloc)
2379 break;
2380
2381 if (p == NULL)
2382 {
2383 p = ((struct elf32_arm_pcrel_relocs_copied *)
2384 bfd_alloc (dynobj, sizeof * p));
f21f3fe0 2385
252b5132
RH		 2386 if (p == NULL)
2387 return false;
2388 p->next = eh->pcrel_relocs_copied;
2389 eh->pcrel_relocs_copied = p;
2390 p->section = sreloc;
2391 p->count = 0;
2392 }
2393
2394 ++p->count;
2395 }
2396 }
2397 break;
2398
2399 /* This relocation describes the C++ object vtable hierarchy.
2400 Reconstruct it for later use during GC. */
2401 case R_ARM_GNU_VTINHERIT:
2402 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2403 return false;
2404 break;
dece4658 2405
252b5132
RH		 2406 /* This relocation describes which C++ vtable entries are actually
2407 used. Record for later use during GC. */
2408 case R_ARM_GNU_VTENTRY:
d512aa07 2409 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
252b5132
RH		 2410 return false;
2411 break;
2412 }
2413 }
f21f3fe0 2414
252b5132
RH		 2415 return true;
2416}
2417
f21f3fe0 2418
252b5132
RH		 2419/* Find the nearest line to a particular section and offset, for error
2420 reporting. This code is a duplicate of the code in elf.c, except
2421 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
2422
2423static boolean
2424elf32_arm_find_nearest_line
2425 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2426 bfd * abfd;
2427 asection * section;
2428 asymbol ** symbols;
2429 bfd_vma offset;
2430 CONST char ** filename_ptr;
2431 CONST char ** functionname_ptr;
2432 unsigned int * line_ptr;
2433{
2434 boolean found;
2435 const char * filename;
2436 asymbol * func;
2437 bfd_vma low_func;
2438 asymbol ** p;
2439
2440 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 2441 filename_ptr, functionname_ptr,
5e38c3b8 2442 line_ptr, 0))
252b5132
RH		 2443 return true;
2444
2445 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2446 &found, filename_ptr,
2447 functionname_ptr, line_ptr,
2448 &elf_tdata (abfd)->line_info))
2449 return false;
f21f3fe0 2450
252b5132
RH		 2451 if (found)
2452 return true;
2453
2454 if (symbols == NULL)
2455 return false;
2456
2457 filename = NULL;
2458 func = NULL;
2459 low_func = 0;
2460
2461 for (p = symbols; *p != NULL; p++)
2462 {
2463 elf_symbol_type *q;
2464
2465 q = (elf_symbol_type *) *p;
2466
2467 if (bfd_get_section (&q->symbol) != section)
2468 continue;
2469
2470 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2471 {
2472 default:
2473 break;
2474 case STT_FILE:
2475 filename = bfd_asymbol_name (&q->symbol);
2476 break;
2477 case STT_NOTYPE:
2478 case STT_FUNC:
2479 case STT_ARM_TFUNC:
2480 if (q->symbol.section == section
2481 && q->symbol.value >= low_func
2482 && q->symbol.value <= offset)
2483 {
2484 func = (asymbol *) q;
2485 low_func = q->symbol.value;
2486 }
2487 break;
2488 }
2489 }
2490
2491 if (func == NULL)
2492 return false;
2493
2494 *filename_ptr = filename;
2495 *functionname_ptr = bfd_asymbol_name (func);
2496 *line_ptr = 0;
f21f3fe0 2497
252b5132
RH		 2498 return true;
2499}
2500
2501/* Adjust a symbol defined by a dynamic object and referenced by a
2502 regular object. The current definition is in some section of the
2503 dynamic object, but we're not including those sections. We have to
2504 change the definition to something the rest of the link can
2505 understand. */
2506
2507static boolean
2508elf32_arm_adjust_dynamic_symbol (info, h)
2509 struct bfd_link_info * info;
2510 struct elf_link_hash_entry * h;
2511{
2512 bfd * dynobj;
2513 asection * s;
2514 unsigned int power_of_two;
2515
2516 dynobj = elf_hash_table (info)->dynobj;
2517
2518 /* Make sure we know what is going on here. */
2519 BFD_ASSERT (dynobj != NULL
2520 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2521 || h->weakdef != NULL
2522 || ((h->elf_link_hash_flags
2523 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2524 && (h->elf_link_hash_flags
2525 & ELF_LINK_HASH_REF_REGULAR) != 0
2526 && (h->elf_link_hash_flags
2527 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2528
2529 /* If this is a function, put it in the procedure linkage table. We
2530 will fill in the contents of the procedure linkage table later,
2531 when we know the address of the .got section. */
2532 if (h->type == STT_FUNC
2533 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2534 {
2535 if (! info->shared
2536 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2537 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2538 {
2539 /* This case can occur if we saw a PLT32 reloc in an input
2540 file, but the symbol was never referred to by a dynamic
2541 object. In such a case, we don't actually need to build
2542 a procedure linkage table, and we can just do a PC32
2543 reloc instead. */
2544 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2545 return true;
2546 }
2547
2548 /* Make sure this symbol is output as a dynamic symbol. */
2549 if (h->dynindx == -1)
2550 {
2551 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2552 return false;
2553 }
2554
2555 s = bfd_get_section_by_name (dynobj, ".plt");
2556 BFD_ASSERT (s != NULL);
2557
2558 /* If this is the first .plt entry, make room for the special
2559 first entry. */
2560 if (s->_raw_size == 0)
2561 s->_raw_size += PLT_ENTRY_SIZE;
2562
2563 /* If this symbol is not defined in a regular file, and we are
2564 not generating a shared library, then set the symbol to this
2565 location in the .plt. This is required to make function
2566 pointers compare as equal between the normal executable and
2567 the shared library. */
2568 if (! info->shared
2569 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2570 {
2571 h->root.u.def.section = s;
2572 h->root.u.def.value = s->_raw_size;
2573 }
2574
2575 h->plt.offset = s->_raw_size;
2576
2577 /* Make room for this entry. */
2578 s->_raw_size += PLT_ENTRY_SIZE;
2579
2580 /* We also need to make an entry in the .got.plt section, which
2581 will be placed in the .got section by the linker script. */
2582
2583 s = bfd_get_section_by_name (dynobj, ".got.plt");
2584 BFD_ASSERT (s != NULL);
2585 s->_raw_size += 4;
2586
2587 /* We also need to make an entry in the .rel.plt section. */
2588
2589 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2590 BFD_ASSERT (s != NULL);
2591 s->_raw_size += sizeof (Elf32_External_Rel);
2592
2593 return true;
2594 }
2595
2596 /* If this is a weak symbol, and there is a real definition, the
2597 processor independent code will have arranged for us to see the
2598 real definition first, and we can just use the same value. */
2599 if (h->weakdef != NULL)
2600 {
2601 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2602 || h->weakdef->root.type == bfd_link_hash_defweak);
2603 h->root.u.def.section = h->weakdef->root.u.def.section;
2604 h->root.u.def.value = h->weakdef->root.u.def.value;
2605 return true;
2606 }
2607
2608 /* This is a reference to a symbol defined by a dynamic object which
2609 is not a function. */
2610
2611 /* If we are creating a shared library, we must presume that the
2612 only references to the symbol are via the global offset table.
2613 For such cases we need not do anything here; the relocations will
2614 be handled correctly by relocate_section. */
2615 if (info->shared)
2616 return true;
2617
2618 /* We must allocate the symbol in our .dynbss section, which will
2619 become part of the .bss section of the executable. There will be
2620 an entry for this symbol in the .dynsym section. The dynamic
2621 object will contain position independent code, so all references
2622 from the dynamic object to this symbol will go through the global
2623 offset table. The dynamic linker will use the .dynsym entry to
2624 determine the address it must put in the global offset table, so
2625 both the dynamic object and the regular object will refer to the
2626 same memory location for the variable. */
2627
2628 s = bfd_get_section_by_name (dynobj, ".dynbss");
2629 BFD_ASSERT (s != NULL);
2630
2631 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2632 copy the initial value out of the dynamic object and into the
2633 runtime process image. We need to remember the offset into the
2634 .rel.bss section we are going to use. */
2635 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2636 {
2637 asection *srel;
2638
2639 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
2640 BFD_ASSERT (srel != NULL);
2641 srel->_raw_size += sizeof (Elf32_External_Rel);
2642 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2643 }
2644
2645 /* We need to figure out the alignment required for this symbol. I
2646 have no idea how ELF linkers handle this. */
2647 power_of_two = bfd_log2 (h->size);
2648 if (power_of_two > 3)
2649 power_of_two = 3;
2650
2651 /* Apply the required alignment. */
2652 s->_raw_size = BFD_ALIGN (s->_raw_size,
2653 (bfd_size_type) (1 << power_of_two));
2654 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2655 {
2656 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2657 return false;
2658 }
2659
2660 /* Define the symbol as being at this point in the section. */
2661 h->root.u.def.section = s;
2662 h->root.u.def.value = s->_raw_size;
2663
2664 /* Increment the section size to make room for the symbol. */
2665 s->_raw_size += h->size;
2666
2667 return true;
2668}
2669
2670/* Set the sizes of the dynamic sections. */
2671
2672static boolean
2673elf32_arm_size_dynamic_sections (output_bfd, info)
2674 bfd * output_bfd;
2675 struct bfd_link_info * info;
2676{
2677 bfd * dynobj;
2678 asection * s;
2679 boolean plt;
2680 boolean relocs;
2681 boolean reltext;
2682
2683 dynobj = elf_hash_table (info)->dynobj;
2684 BFD_ASSERT (dynobj != NULL);
2685
2686 if (elf_hash_table (info)->dynamic_sections_created)
2687 {
2688 /* Set the contents of the .interp section to the interpreter. */
2689 if (! info->shared)
2690 {
2691 s = bfd_get_section_by_name (dynobj, ".interp");
2692 BFD_ASSERT (s != NULL);
2693 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2694 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2695 }
2696 }
2697 else
2698 {
2699 /* We may have created entries in the .rel.got section.
2700 However, if we are not creating the dynamic sections, we will
2701 not actually use these entries. Reset the size of .rel.got,
2702 which will cause it to get stripped from the output file
2703 below. */
2704 s = bfd_get_section_by_name (dynobj, ".rel.got");
2705 if (s != NULL)
2706 s->_raw_size = 0;
2707 }
2708
2709 /* If this is a -Bsymbolic shared link, then we need to discard all
2710 PC relative relocs against symbols defined in a regular object.
2711 We allocated space for them in the check_relocs routine, but we
2712 will not fill them in in the relocate_section routine. */
2713 if (info->shared && info->symbolic)
2714 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
2715 elf32_arm_discard_copies,
2716 (PTR) NULL);
2717
2718 /* The check_relocs and adjust_dynamic_symbol entry points have
2719 determined the sizes of the various dynamic sections. Allocate
2720 memory for them. */
2721 plt = false;
2722 relocs = false;
2723 reltext = false;
2724 for (s = dynobj->sections; s != NULL; s = s->next)
2725 {
2726 const char * name;
2727 boolean strip;
2728
2729 if ((s->flags & SEC_LINKER_CREATED) == 0)
2730 continue;
2731
2732 /* It's OK to base decisions on the section name, because none
2733 of the dynobj section names depend upon the input files. */
2734 name = bfd_get_section_name (dynobj, s);
2735
2736 strip = false;
2737
2738 if (strcmp (name, ".plt") == 0)
2739 {
2740 if (s->_raw_size == 0)
2741 {
2742 /* Strip this section if we don't need it; see the
2743 comment below. */
2744 strip = true;
2745 }
2746 else
2747 {
2748 /* Remember whether there is a PLT. */
2749 plt = true;
2750 }
2751 }
2752 else if (strncmp (name, ".rel", 4) == 0)
2753 {
2754 if (s->_raw_size == 0)
2755 {
2756 /* If we don't need this section, strip it from the
2757 output file. This is mostly to handle .rel.bss and
2758 .rel.plt. We must create both sections in
2759 create_dynamic_sections, because they must be created
2760 before the linker maps input sections to output
2761 sections. The linker does that before
2762 adjust_dynamic_symbol is called, and it is that
2763 function which decides whether anything needs to go
2764 into these sections. */
2765 strip = true;
2766 }
2767 else
2768 {
2769 asection * target;
2770
2771 /* Remember whether there are any reloc sections other
2772 than .rel.plt. */
2773 if (strcmp (name, ".rel.plt") != 0)
2774 {
2775 const char *outname;
2776
2777 relocs = true;
2778
2779 /* If this relocation section applies to a read only
2780 section, then we probably need a DT_TEXTREL
2781 entry. The entries in the .rel.plt section
2782 really apply to the .got section, which we
2783 created ourselves and so know is not readonly. */
2784 outname = bfd_get_section_name (output_bfd,
2785 s->output_section);
2786 target = bfd_get_section_by_name (output_bfd, outname + 4);
2787 if (target != NULL
2788 && (target->flags & SEC_READONLY) != 0
2789 && (target->flags & SEC_ALLOC) != 0)
2790 reltext = true;
2791 }
2792
2793 /* We use the reloc_count field as a counter if we need
2794 to copy relocs into the output file. */
2795 s->reloc_count = 0;
2796 }
2797 }
2798 else if (strncmp (name, ".got", 4) != 0)
2799 {
2800 /* It's not one of our sections, so don't allocate space. */
2801 continue;
2802 }
2803
2804 if (strip)
2805 {
2806 asection ** spp;
2807
2808 for (spp = &s->output_section->owner->sections;
2809 *spp != s->output_section;
2810 spp = &(*spp)->next)
2811 ;
2812 *spp = s->output_section->next;
2813 --s->output_section->owner->section_count;
2814
2815 continue;
2816 }
2817
2818 /* Allocate memory for the section contents. */
2819 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2820 if (s->contents == NULL && s->_raw_size != 0)
2821 return false;
2822 }
2823
2824 if (elf_hash_table (info)->dynamic_sections_created)
2825 {
2826 /* Add some entries to the .dynamic section. We fill in the
2827 values later, in elf32_arm_finish_dynamic_sections, but we
2828 must add the entries now so that we get the correct size for
2829 the .dynamic section. The DT_DEBUG entry is filled in by the
2830 dynamic linker and used by the debugger. */
2831 if (! info->shared)
2832 {
2833 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
2834 return false;
2835 }
2836
2837 if (plt)
2838 {
2839 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
2840 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2841 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL)
2842 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
2843 return false;
2844 }
2845
2846 if (relocs)
2847 {
2848 if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
2849 || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
2850 || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
2851 sizeof (Elf32_External_Rel)))
2852 return false;
2853 }
2854
2855 if (reltext)
2856 {
2857 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
2858 return false;
2859 }
2860 }
2861
2862 return true;
2863}
2864
2865/* This function is called via elf32_arm_link_hash_traverse if we are
2866 creating a shared object with -Bsymbolic. It discards the space
2867 allocated to copy PC relative relocs against symbols which are
2868 defined in regular objects. We allocated space for them in the
2869 check_relocs routine, but we won't fill them in in the
2870 relocate_section routine. */
2871
2872static boolean
2873elf32_arm_discard_copies (h, ignore)
2874 struct elf32_arm_link_hash_entry * h;
5f771d47 2875 PTR ignore ATTRIBUTE_UNUSED;
252b5132
RH		 2876{
2877 struct elf32_arm_pcrel_relocs_copied * s;
2878
2879 /* We only discard relocs for symbols defined in a regular object. */
2880 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2881 return true;
2882
2883 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
2884 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
2885
2886 return true;
2887}
2888
2889/* Finish up dynamic symbol handling. We set the contents of various
2890 dynamic sections here. */
2891
2892static boolean
2893elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
2894 bfd * output_bfd;
2895 struct bfd_link_info * info;
2896 struct elf_link_hash_entry * h;
2897 Elf_Internal_Sym * sym;
2898{
2899 bfd * dynobj;
2900
2901 dynobj = elf_hash_table (info)->dynobj;
2902
2903 if (h->plt.offset != (bfd_vma) -1)
2904 {
2905 asection * splt;
2906 asection * sgot;
2907 asection * srel;
2908 bfd_vma plt_index;
2909 bfd_vma got_offset;
2910 Elf_Internal_Rel rel;
2911
2912 /* This symbol has an entry in the procedure linkage table. Set
2913 it up. */
2914
2915 BFD_ASSERT (h->dynindx != -1);
2916
2917 splt = bfd_get_section_by_name (dynobj, ".plt");
2918 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2919 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
2920 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
2921
2922 /* Get the index in the procedure linkage table which
2923 corresponds to this symbol. This is the index of this symbol
2924 in all the symbols for which we are making plt entries. The
2925 first entry in the procedure linkage table is reserved. */
2926 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2927
2928 /* Get the offset into the .got table of the entry that
2929 corresponds to this function. Each .got entry is 4 bytes.
2930 The first three are reserved. */
2931 got_offset = (plt_index + 3) * 4;
2932
2933 /* Fill in the entry in the procedure linkage table. */
2934 memcpy (splt->contents + h->plt.offset,
2935 elf32_arm_plt_entry,
2936 PLT_ENTRY_SIZE);
2937 bfd_put_32 (output_bfd,
2938 (sgot->output_section->vma
2939 + sgot->output_offset
f21f3fe0 2940 + got_offset
252b5132
RH		 2941 - splt->output_section->vma
2942 - splt->output_offset
2943 - h->plt.offset - 12),
2944 splt->contents + h->plt.offset + 12);
2945
2946 /* Fill in the entry in the global offset table. */
2947 bfd_put_32 (output_bfd,
2948 (splt->output_section->vma
2949 + splt->output_offset),
2950 sgot->contents + got_offset);
2951
2952 /* Fill in the entry in the .rel.plt section. */
2953 rel.r_offset = (sgot->output_section->vma
2954 + sgot->output_offset
2955 + got_offset);
2956 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
2957 bfd_elf32_swap_reloc_out (output_bfd, &rel,
2958 ((Elf32_External_Rel *) srel->contents
2959 + plt_index));
2960
2961 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2962 {
2963 /* Mark the symbol as undefined, rather than as defined in
2964 the .plt section. Leave the value alone. */
2965 sym->st_shndx = SHN_UNDEF;
2966 }
2967 }
2968
2969 if (h->got.offset != (bfd_vma) -1)
2970 {
2971 asection * sgot;
2972 asection * srel;
2973 Elf_Internal_Rel rel;
2974
2975 /* This symbol has an entry in the global offset table. Set it
2976 up. */
f21f3fe0 2977
252b5132
RH		 2978 sgot = bfd_get_section_by_name (dynobj, ".got");
2979 srel = bfd_get_section_by_name (dynobj, ".rel.got");
2980 BFD_ASSERT (sgot != NULL && srel != NULL);
2981
2982 rel.r_offset = (sgot->output_section->vma
2983 + sgot->output_offset
2984 + (h->got.offset &~ 1));
2985
2986 /* If this is a -Bsymbolic link, and the symbol is defined
2987 locally, we just want to emit a RELATIVE reloc. The entry in
2988 the global offset table will already have been initialized in
2989 the relocate_section function. */
2990 if (info->shared
2991 && (info->symbolic || h->dynindx == -1)
2992 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2993 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2994 else
2995 {
2996 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2997 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
2998 }
2999
3000 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3001 ((Elf32_External_Rel *) srel->contents
3002 + srel->reloc_count));
3003 ++srel->reloc_count;
3004 }
3005
3006 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3007 {
3008 asection * s;
3009 Elf_Internal_Rel rel;
3010
3011 /* This symbol needs a copy reloc. Set it up. */
3012
3013 BFD_ASSERT (h->dynindx != -1
3014 && (h->root.type == bfd_link_hash_defined
3015 || h->root.type == bfd_link_hash_defweak));
3016
3017 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3018 ".rel.bss");
3019 BFD_ASSERT (s != NULL);
3020
3021 rel.r_offset = (h->root.u.def.value
3022 + h->root.u.def.section->output_section->vma
3023 + h->root.u.def.section->output_offset);
3024 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3025 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3026 ((Elf32_External_Rel *) s->contents
3027 + s->reloc_count));
3028 ++s->reloc_count;
3029 }
3030
3031 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3032 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3033 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3034 sym->st_shndx = SHN_ABS;
3035
3036 return true;
3037}
3038
3039/* Finish up the dynamic sections. */
3040
3041static boolean
3042elf32_arm_finish_dynamic_sections (output_bfd, info)
3043 bfd * output_bfd;
3044 struct bfd_link_info * info;
3045{
3046 bfd * dynobj;
3047 asection * sgot;
3048 asection * sdyn;
3049
3050 dynobj = elf_hash_table (info)->dynobj;
3051
3052 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3053 BFD_ASSERT (sgot != NULL);
3054 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3055
3056 if (elf_hash_table (info)->dynamic_sections_created)
3057 {
3058 asection *splt;
3059 Elf32_External_Dyn *dyncon, *dynconend;
3060
3061 splt = bfd_get_section_by_name (dynobj, ".plt");
3062 BFD_ASSERT (splt != NULL && sdyn != NULL);
3063
3064 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3065 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3066 for (; dyncon < dynconend; dyncon++)
3067 {
3068 Elf_Internal_Dyn dyn;
3069 const char * name;
3070 asection * s;
3071
3072 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3073
3074 switch (dyn.d_tag)
3075 {
3076 default:
3077 break;
3078
3079 case DT_PLTGOT:
3080 name = ".got";
3081 goto get_vma;
3082 case DT_JMPREL:
3083 name = ".rel.plt";
3084 get_vma:
3085 s = bfd_get_section_by_name (output_bfd, name);
3086 BFD_ASSERT (s != NULL);
3087 dyn.d_un.d_ptr = s->vma;
3088 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3089 break;
3090
3091 case DT_PLTRELSZ:
3092 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3093 BFD_ASSERT (s != NULL);
3094 if (s->_cooked_size != 0)
3095 dyn.d_un.d_val = s->_cooked_size;
3096 else
3097 dyn.d_un.d_val = s->_raw_size;
3098 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3099 break;
3100
3101 case DT_RELSZ:
3102 /* My reading of the SVR4 ABI indicates that the
3103 procedure linkage table relocs (DT_JMPREL) should be
3104 included in the overall relocs (DT_REL). This is
3105 what Solaris does. However, UnixWare can not handle
3106 that case. Therefore, we override the DT_RELSZ entry
3107 here to make it not include the JMPREL relocs. Since
3108 the linker script arranges for .rel.plt to follow all
3109 other relocation sections, we don't have to worry
3110 about changing the DT_REL entry. */
3111 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3112 if (s != NULL)
3113 {
3114 if (s->_cooked_size != 0)
3115 dyn.d_un.d_val -= s->_cooked_size;
3116 else
3117 dyn.d_un.d_val -= s->_raw_size;
3118 }
3119 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3120 break;
3121 }
3122 }
3123
3124 /* Fill in the first entry in the procedure linkage table. */
3125 if (splt->_raw_size > 0)
3126 memcpy (splt->contents, elf32_arm_plt0_entry, PLT_ENTRY_SIZE);
3127
3128 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3129 really seem like the right value. */
3130 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3131 }
3132
3133 /* Fill in the first three entries in the global offset table. */
3134 if (sgot->_raw_size > 0)
3135 {
3136 if (sdyn == NULL)
3137 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3138 else
3139 bfd_put_32 (output_bfd,
3140 sdyn->output_section->vma + sdyn->output_offset,
3141 sgot->contents);
3142 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3143 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3144 }
3145
3146 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3147
3148 return true;
3149}
3150
ba96a88f
NC		 3151static void
3152elf32_arm_post_process_headers (abfd, link_info)
3153 bfd * abfd;
5f771d47 3154 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f
NC		 3155{
3156 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
3157
3158 i_ehdrp = elf_elfheader (abfd);
3159
3160 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3161 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3162}
3163
3164
252b5132
RH		 3165#define ELF_ARCH bfd_arch_arm
3166#define ELF_MACHINE_CODE EM_ARM
f21f3fe0 3167#define ELF_MAXPAGESIZE 0x8000
252b5132
RH		 3168
3169
3170#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3171#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
3172#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3173#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3174#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
3175#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
3176#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3177
3178#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3179#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3180#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3181#define elf_backend_check_relocs elf32_arm_check_relocs
3182#define elf_backend_relocate_section elf32_arm_relocate_section
3183#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3184#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3185#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3186#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3187#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 3188#define elf_backend_post_process_headers elf32_arm_post_process_headers
252b5132
RH		 3189
3190#define elf_backend_can_gc_sections 1
3191#define elf_backend_plt_readonly 1
3192#define elf_backend_want_got_plt 1
3193#define elf_backend_want_plt_sym 0
3194
04f7c78d
NC		 3195#define elf_backend_got_header_size 12
3196#define elf_backend_plt_header_size PLT_ENTRY_SIZE
3197
252b5132 3198#include "elf32-target.h"
GDB Binutils - Deliverables
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