2004-04-22 Andrew Cagney <cagney@redhat.com>
[deliverable/binutils-gdb.git] / bfd / elf32-arm.h
CommitLineData
252b5132 1/* 32-bit ELF support for ARM
d1f161ea
NC
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
252b5132
RH
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
acf8aed4
AM
21#ifndef USE_REL
22#define USE_REL 0
23#endif
24
252b5132
RH
25typedef unsigned long int insn32;
26typedef unsigned short int insn16;
27
b34976b6 28static bfd_boolean elf32_arm_set_private_flags
252b5132 29 PARAMS ((bfd *, flagword));
b34976b6 30static bfd_boolean elf32_arm_copy_private_bfd_data
252b5132 31 PARAMS ((bfd *, bfd *));
b34976b6 32static bfd_boolean elf32_arm_merge_private_bfd_data
252b5132 33 PARAMS ((bfd *, bfd *));
b34976b6 34static bfd_boolean elf32_arm_print_private_bfd_data
252b5132 35 PARAMS ((bfd *, PTR));
f21f3fe0 36static int elf32_arm_get_symbol_type
252b5132
RH
37 PARAMS (( Elf_Internal_Sym *, int));
38static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
39 PARAMS ((bfd *));
40static bfd_reloc_status_type elf32_arm_final_link_relocate
780a67af
NC
41 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
dc810e39 43 const char *, int, struct elf_link_hash_entry *));
252b5132
RH
44static insn32 insert_thumb_branch
45 PARAMS ((insn32, int));
46static struct elf_link_hash_entry *find_thumb_glue
917583ad 47 PARAMS ((struct bfd_link_info *, const char *, bfd *));
252b5132 48static struct elf_link_hash_entry *find_arm_glue
917583ad 49 PARAMS ((struct bfd_link_info *, const char *, bfd *));
ba96a88f
NC
50static void elf32_arm_post_process_headers
51 PARAMS ((bfd *, struct bfd_link_info *));
bcbdc74c
NC
52static int elf32_arm_to_thumb_stub
53 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
54 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
55static int elf32_thumb_to_arm_stub
56 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
57 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
b34976b6 58static bfd_boolean elf32_arm_relocate_section
917583ad
NC
59 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
60 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
61static asection * elf32_arm_gc_mark_hook
1e2f5b6e 62 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
917583ad 63 struct elf_link_hash_entry *, Elf_Internal_Sym *));
b34976b6 64static bfd_boolean elf32_arm_gc_sweep_hook
917583ad
NC
65 PARAMS ((bfd *, struct bfd_link_info *, asection *,
66 const Elf_Internal_Rela *));
b34976b6 67static bfd_boolean elf32_arm_check_relocs
917583ad
NC
68 PARAMS ((bfd *, struct bfd_link_info *, asection *,
69 const Elf_Internal_Rela *));
b34976b6 70static bfd_boolean elf32_arm_find_nearest_line
917583ad
NC
71 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
72 const char **, unsigned int *));
b34976b6 73static bfd_boolean elf32_arm_adjust_dynamic_symbol
917583ad 74 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
b34976b6 75static bfd_boolean elf32_arm_size_dynamic_sections
917583ad 76 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6 77static bfd_boolean elf32_arm_finish_dynamic_symbol
917583ad
NC
78 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
79 Elf_Internal_Sym *));
b34976b6 80static bfd_boolean elf32_arm_finish_dynamic_sections
917583ad
NC
81 PARAMS ((bfd *, struct bfd_link_info *));
82static struct bfd_hash_entry * elf32_arm_link_hash_newfunc
83 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
acf8aed4 84#if USE_REL
917583ad
NC
85static void arm_add_to_rel
86 PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma));
87#endif
5e681ec4
PB
88static bfd_boolean allocate_dynrelocs
89 PARAMS ((struct elf_link_hash_entry *h, PTR inf));
90static bfd_boolean create_got_section
91 PARAMS ((bfd * dynobj, struct bfd_link_info * info));
92static bfd_boolean elf32_arm_create_dynamic_sections
93 PARAMS ((bfd * dynobj, struct bfd_link_info * info));
7e392df6
NC
94static enum elf_reloc_type_class elf32_arm_reloc_type_class
95 PARAMS ((const Elf_Internal_Rela *));
c178919b
NC
96static bfd_boolean elf32_arm_object_p
97 PARAMS ((bfd *));
252b5132 98
7e392df6
NC
99#ifndef ELFARM_NABI_C_INCLUDED
100static void record_arm_to_thumb_glue
101 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
102static void record_thumb_to_arm_glue
103 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
b34976b6 104bfd_boolean bfd_elf32_arm_allocate_interworking_sections
917583ad 105 PARAMS ((struct bfd_link_info *));
b34976b6 106bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
917583ad 107 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6 108bfd_boolean bfd_elf32_arm_process_before_allocation
e489d0ae 109 PARAMS ((bfd *, struct bfd_link_info *, int, int));
7e392df6
NC
110#endif
111
99e4ae17 112
fd2ec330 113#define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
9b485d32 114
252b5132
RH
115/* The linker script knows the section names for placement.
116 The entry_names are used to do simple name mangling on the stubs.
117 Given a function name, and its type, the stub can be found. The
9b485d32 118 name can be changed. The only requirement is the %s be present. */
252b5132
RH
119#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
120#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
121
122#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
123#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
124
125/* The name of the dynamic interpreter. This is put in the .interp
126 section. */
127#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
128
5e681ec4
PB
129#ifdef FOUR_WORD_PLT
130
131/* The size in bytes of the special first entry in the procedure
132 linkage table. */
133#define PLT_HEADER_SIZE 16
134
252b5132 135/* The size in bytes of an entry in the procedure linkage table. */
24a1ba0f 136#define PLT_ENTRY_SIZE 16
252b5132
RH
137
138/* The first entry in a procedure linkage table looks like
139 this. It is set up so that any shared library function that is
59f2c4e7 140 called before the relocation has been set up calls the dynamic
9b485d32 141 linker first. */
5e681ec4
PB
142static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
143 {
144 0xe52de004, /* str lr, [sp, #-4]! */
145 0xe59fe010, /* ldr lr, [pc, #16] */
146 0xe08fe00e, /* add lr, pc, lr */
147 0xe5bef008, /* ldr pc, [lr, #8]! */
148 };
149
150/* Subsequent entries in a procedure linkage table look like
151 this. */
152static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
153 {
154 0xe28fc600, /* add ip, pc, #NN */
155 0xe28cca00, /* add ip, ip, #NN */
156 0xe5bcf000, /* ldr pc, [ip, #NN]! */
157 0x00000000, /* unused */
158 };
159
160#else
161
162/* The size in bytes of the special first entry in the procedure
163 linkage table. */
164#define PLT_HEADER_SIZE 20
165
166/* The size in bytes of an entry in the procedure linkage table. */
167#define PLT_ENTRY_SIZE 12
168
169/* The first entry in a procedure linkage table looks like
170 this. It is set up so that any shared library function that is
171 called before the relocation has been set up calls the dynamic
172 linker first. */
173static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
917583ad 174 {
5e681ec4
PB
175 0xe52de004, /* str lr, [sp, #-4]! */
176 0xe59fe004, /* ldr lr, [pc, #4] */
177 0xe08fe00e, /* add lr, pc, lr */
178 0xe5bef008, /* ldr pc, [lr, #8]! */
179 0x00000000, /* &GOT[0] - . */
917583ad 180 };
252b5132
RH
181
182/* Subsequent entries in a procedure linkage table look like
183 this. */
24a1ba0f 184static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
5e681ec4
PB
185 {
186 0xe28fc600, /* add ip, pc, #0xNN00000 */
187 0xe28cca00, /* add ip, ip, #0xNN000 */
188 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
189 };
190
191#endif
252b5132 192
e489d0ae
PB
193/* Used to build a map of a section. This is required for mixed-endian
194 code/data. */
195
196typedef struct elf32_elf_section_map
197{
198 bfd_vma vma;
199 char type;
200}
201elf32_arm_section_map;
202
203struct _arm_elf_section_data
204{
205 struct bfd_elf_section_data elf;
206 int mapcount;
207 elf32_arm_section_map *map;
208};
209
210#define elf32_arm_section_data(sec) \
211 ((struct _arm_elf_section_data *) elf_section_data (sec))
212
252b5132
RH
213/* The ARM linker needs to keep track of the number of relocs that it
214 decides to copy in check_relocs for each symbol. This is so that
215 it can discard PC relative relocs if it doesn't need them when
216 linking with -Bsymbolic. We store the information in a field
217 extending the regular ELF linker hash table. */
218
219/* This structure keeps track of the number of PC relative relocs we
220 have copied for a given symbol. */
5e681ec4 221struct elf32_arm_relocs_copied
917583ad
NC
222 {
223 /* Next section. */
5e681ec4 224 struct elf32_arm_relocs_copied * next;
917583ad
NC
225 /* A section in dynobj. */
226 asection * section;
227 /* Number of relocs copied in this section. */
228 bfd_size_type count;
229 };
252b5132 230
ba96a88f 231/* Arm ELF linker hash entry. */
252b5132 232struct elf32_arm_link_hash_entry
917583ad
NC
233 {
234 struct elf_link_hash_entry root;
252b5132 235
917583ad 236 /* Number of PC relative relocs copied for this symbol. */
5e681ec4 237 struct elf32_arm_relocs_copied * relocs_copied;
917583ad 238 };
252b5132 239
252b5132 240/* Traverse an arm ELF linker hash table. */
252b5132
RH
241#define elf32_arm_link_hash_traverse(table, func, info) \
242 (elf_link_hash_traverse \
243 (&(table)->root, \
b34976b6 244 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
252b5132
RH
245 (info)))
246
247/* Get the ARM elf linker hash table from a link_info structure. */
248#define elf32_arm_hash_table(info) \
249 ((struct elf32_arm_link_hash_table *) ((info)->hash))
250
9b485d32 251/* ARM ELF linker hash table. */
252b5132 252struct elf32_arm_link_hash_table
917583ad
NC
253 {
254 /* The main hash table. */
255 struct elf_link_hash_table root;
252b5132 256
4cc11e76 257 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
dc810e39 258 bfd_size_type thumb_glue_size;
252b5132 259
4cc11e76 260 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
dc810e39 261 bfd_size_type arm_glue_size;
252b5132 262
4cc11e76 263 /* An arbitrary input BFD chosen to hold the glue sections. */
917583ad 264 bfd * bfd_of_glue_owner;
ba96a88f 265
917583ad
NC
266 /* A boolean indicating whether knowledge of the ARM's pipeline
267 length should be applied by the linker. */
268 int no_pipeline_knowledge;
5e681ec4 269
e489d0ae
PB
270 /* Nonzero to output a BE8 image. */
271 int byteswap_code;
272
5e681ec4
PB
273 /* Short-cuts to get to dynamic linker sections. */
274 asection *sgot;
275 asection *sgotplt;
276 asection *srelgot;
277 asection *splt;
278 asection *srelplt;
279 asection *sdynbss;
280 asection *srelbss;
281
282 /* Small local sym to section mapping cache. */
283 struct sym_sec_cache sym_sec;
917583ad 284 };
252b5132 285
780a67af
NC
286/* Create an entry in an ARM ELF linker hash table. */
287
288static struct bfd_hash_entry *
289elf32_arm_link_hash_newfunc (entry, table, string)
290 struct bfd_hash_entry * entry;
291 struct bfd_hash_table * table;
292 const char * string;
293{
294 struct elf32_arm_link_hash_entry * ret =
295 (struct elf32_arm_link_hash_entry *) entry;
296
297 /* Allocate the structure if it has not already been allocated by a
298 subclass. */
299 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
300 ret = ((struct elf32_arm_link_hash_entry *)
301 bfd_hash_allocate (table,
302 sizeof (struct elf32_arm_link_hash_entry)));
303 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
304 return (struct bfd_hash_entry *) ret;
305
306 /* Call the allocation method of the superclass. */
307 ret = ((struct elf32_arm_link_hash_entry *)
308 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
309 table, string));
310 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
5e681ec4 311 ret->relocs_copied = NULL;
780a67af
NC
312
313 return (struct bfd_hash_entry *) ret;
314}
315
5e681ec4
PB
316/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
317 shortcuts to them in our hash table. */
318
319static bfd_boolean
320create_got_section (dynobj, info)
321 bfd *dynobj;
322 struct bfd_link_info *info;
323{
324 struct elf32_arm_link_hash_table *htab;
325
326 if (! _bfd_elf_create_got_section (dynobj, info))
327 return FALSE;
328
329 htab = elf32_arm_hash_table (info);
330 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
331 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
332 if (!htab->sgot || !htab->sgotplt)
333 abort ();
334
335 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
336 if (htab->srelgot == NULL
337 || ! bfd_set_section_flags (dynobj, htab->srelgot,
338 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
339 | SEC_IN_MEMORY | SEC_LINKER_CREATED
340 | SEC_READONLY))
341 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
342 return FALSE;
343 return TRUE;
344}
345
346/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
347 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
348 hash table. */
349
350static bfd_boolean
351elf32_arm_create_dynamic_sections (dynobj, info)
352 bfd *dynobj;
353 struct bfd_link_info *info;
354{
355 struct elf32_arm_link_hash_table *htab;
356
357 htab = elf32_arm_hash_table (info);
358 if (!htab->sgot && !create_got_section (dynobj, info))
359 return FALSE;
360
361 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
362 return FALSE;
363
364 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
365 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
366 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
367 if (!info->shared)
368 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
369
370 if (!htab->splt || !htab->srelplt || !htab->sdynbss
371 || (!info->shared && !htab->srelbss))
372 abort ();
373
374 return TRUE;
375}
376
377/* Copy the extra info we tack onto an elf_link_hash_entry. */
378
379static void
380elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
381 struct elf_link_hash_entry *dir,
382 struct elf_link_hash_entry *ind)
383{
384 struct elf32_arm_link_hash_entry *edir, *eind;
385
386 edir = (struct elf32_arm_link_hash_entry *) dir;
387 eind = (struct elf32_arm_link_hash_entry *) ind;
388
389 if (eind->relocs_copied != NULL)
390 {
391 if (edir->relocs_copied != NULL)
392 {
393 struct elf32_arm_relocs_copied **pp;
394 struct elf32_arm_relocs_copied *p;
395
396 if (ind->root.type == bfd_link_hash_indirect)
397 abort ();
398
399 /* Add reloc counts against the weak sym to the strong sym
400 list. Merge any entries against the same section. */
401 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
402 {
403 struct elf32_arm_relocs_copied *q;
404
405 for (q = edir->relocs_copied; q != NULL; q = q->next)
406 if (q->section == p->section)
407 {
5e681ec4
PB
408 q->count += p->count;
409 *pp = p->next;
410 break;
411 }
412 if (q == NULL)
413 pp = &p->next;
414 }
415 *pp = edir->relocs_copied;
416 }
417
418 edir->relocs_copied = eind->relocs_copied;
419 eind->relocs_copied = NULL;
420 }
421
422 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
423}
424
9b485d32 425/* Create an ARM elf linker hash table. */
252b5132
RH
426
427static struct bfd_link_hash_table *
428elf32_arm_link_hash_table_create (abfd)
429 bfd *abfd;
430{
431 struct elf32_arm_link_hash_table *ret;
dc810e39 432 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
252b5132 433
e2d34d7d 434 ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt);
252b5132
RH
435 if (ret == (struct elf32_arm_link_hash_table *) NULL)
436 return NULL;
437
438 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
780a67af 439 elf32_arm_link_hash_newfunc))
252b5132 440 {
e2d34d7d 441 free (ret);
252b5132
RH
442 return NULL;
443 }
444
5e681ec4
PB
445 ret->sgot = NULL;
446 ret->sgotplt = NULL;
447 ret->srelgot = NULL;
448 ret->splt = NULL;
449 ret->srelplt = NULL;
450 ret->sdynbss = NULL;
451 ret->srelbss = NULL;
252b5132
RH
452 ret->thumb_glue_size = 0;
453 ret->arm_glue_size = 0;
454 ret->bfd_of_glue_owner = NULL;
ba96a88f 455 ret->no_pipeline_knowledge = 0;
e489d0ae 456 ret->byteswap_code = 0;
5e681ec4 457 ret->sym_sec.abfd = NULL;
252b5132
RH
458
459 return &ret->root.root;
460}
461
9b485d32
NC
462/* Locate the Thumb encoded calling stub for NAME. */
463
252b5132
RH
464static struct elf_link_hash_entry *
465find_thumb_glue (link_info, name, input_bfd)
466 struct bfd_link_info *link_info;
917583ad 467 const char *name;
252b5132
RH
468 bfd *input_bfd;
469{
470 char *tmp_name;
471 struct elf_link_hash_entry *hash;
472 struct elf32_arm_link_hash_table *hash_table;
473
474 /* We need a pointer to the armelf specific hash table. */
475 hash_table = elf32_arm_hash_table (link_info);
476
dc810e39
AM
477 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
478 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH
479
480 BFD_ASSERT (tmp_name);
481
482 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
483
484 hash = elf_link_hash_lookup
b34976b6 485 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH
486
487 if (hash == NULL)
488 /* xgettext:c-format */
8f615d07
AM
489 (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"),
490 bfd_archive_filename (input_bfd), tmp_name, name);
252b5132
RH
491
492 free (tmp_name);
493
494 return hash;
495}
496
9b485d32
NC
497/* Locate the ARM encoded calling stub for NAME. */
498
252b5132
RH
499static struct elf_link_hash_entry *
500find_arm_glue (link_info, name, input_bfd)
501 struct bfd_link_info *link_info;
917583ad 502 const char *name;
252b5132
RH
503 bfd *input_bfd;
504{
505 char *tmp_name;
506 struct elf_link_hash_entry *myh;
507 struct elf32_arm_link_hash_table *hash_table;
508
509 /* We need a pointer to the elfarm specific hash table. */
510 hash_table = elf32_arm_hash_table (link_info);
511
dc810e39
AM
512 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
513 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH
514
515 BFD_ASSERT (tmp_name);
516
517 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
518
519 myh = elf_link_hash_lookup
b34976b6 520 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH
521
522 if (myh == NULL)
523 /* xgettext:c-format */
8f615d07
AM
524 (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"),
525 bfd_archive_filename (input_bfd), tmp_name, name);
252b5132
RH
526
527 free (tmp_name);
528
529 return myh;
530}
531
9b485d32 532/* ARM->Thumb glue:
252b5132
RH
533
534 .arm
535 __func_from_arm:
536 ldr r12, __func_addr
537 bx r12
538 __func_addr:
9b485d32 539 .word func @ behave as if you saw a ARM_32 reloc. */
252b5132
RH
540
541#define ARM2THUMB_GLUE_SIZE 12
542static const insn32 a2t1_ldr_insn = 0xe59fc000;
543static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
544static const insn32 a2t3_func_addr_insn = 0x00000001;
545
9b485d32 546/* Thumb->ARM: Thumb->(non-interworking aware) ARM
252b5132
RH
547
548 .thumb .thumb
549 .align 2 .align 2
550 __func_from_thumb: __func_from_thumb:
551 bx pc push {r6, lr}
552 nop ldr r6, __func_addr
553 .arm mov lr, pc
554 __func_change_to_arm: bx r6
555 b func .arm
556 __func_back_to_thumb:
557 ldmia r13! {r6, lr}
558 bx lr
559 __func_addr:
9b485d32 560 .word func */
252b5132
RH
561
562#define THUMB2ARM_GLUE_SIZE 8
563static const insn16 t2a1_bx_pc_insn = 0x4778;
564static const insn16 t2a2_noop_insn = 0x46c0;
565static const insn32 t2a3_b_insn = 0xea000000;
566
7e392df6 567#ifndef ELFARM_NABI_C_INCLUDED
b34976b6 568bfd_boolean
252b5132
RH
569bfd_elf32_arm_allocate_interworking_sections (info)
570 struct bfd_link_info * info;
571{
572 asection * s;
573 bfd_byte * foo;
574 struct elf32_arm_link_hash_table * globals;
575
576 globals = elf32_arm_hash_table (info);
577
578 BFD_ASSERT (globals != NULL);
579
580 if (globals->arm_glue_size != 0)
581 {
582 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
583
dc810e39
AM
584 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
585 ARM2THUMB_GLUE_SECTION_NAME);
252b5132
RH
586
587 BFD_ASSERT (s != NULL);
588
dc810e39
AM
589 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
590 globals->arm_glue_size);
252b5132
RH
591
592 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
593 s->contents = foo;
594 }
595
596 if (globals->thumb_glue_size != 0)
597 {
598 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
599
600 s = bfd_get_section_by_name
601 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
602
603 BFD_ASSERT (s != NULL);
604
dc810e39
AM
605 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
606 globals->thumb_glue_size);
252b5132
RH
607
608 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
609 s->contents = foo;
610 }
611
b34976b6 612 return TRUE;
252b5132
RH
613}
614
615static void
616record_arm_to_thumb_glue (link_info, h)
617 struct bfd_link_info * link_info;
618 struct elf_link_hash_entry * h;
619{
620 const char * name = h->root.root.string;
63b0f745 621 asection * s;
252b5132
RH
622 char * tmp_name;
623 struct elf_link_hash_entry * myh;
14a793b2 624 struct bfd_link_hash_entry * bh;
252b5132 625 struct elf32_arm_link_hash_table * globals;
dc810e39 626 bfd_vma val;
252b5132
RH
627
628 globals = elf32_arm_hash_table (link_info);
629
630 BFD_ASSERT (globals != NULL);
631 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
632
633 s = bfd_get_section_by_name
634 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
635
252b5132
RH
636 BFD_ASSERT (s != NULL);
637
dc810e39
AM
638 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
639 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH
640
641 BFD_ASSERT (tmp_name);
642
643 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
644
645 myh = elf_link_hash_lookup
b34976b6 646 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH
647
648 if (myh != NULL)
649 {
9b485d32 650 /* We've already seen this guy. */
252b5132 651 free (tmp_name);
9b485d32 652 return;
252b5132
RH
653 }
654
655 /* The only trick here is using hash_table->arm_glue_size as the value. Even
656 though the section isn't allocated yet, this is where we will be putting
657 it. */
14a793b2 658 bh = NULL;
dc810e39
AM
659 val = globals->arm_glue_size + 1;
660 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
661 tmp_name, BSF_GLOBAL, s, val,
b34976b6 662 NULL, TRUE, FALSE, &bh);
252b5132
RH
663
664 free (tmp_name);
665
666 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
667
668 return;
669}
670
671static void
672record_thumb_to_arm_glue (link_info, h)
673 struct bfd_link_info *link_info;
674 struct elf_link_hash_entry *h;
675{
676 const char *name = h->root.root.string;
63b0f745 677 asection *s;
252b5132
RH
678 char *tmp_name;
679 struct elf_link_hash_entry *myh;
14a793b2 680 struct bfd_link_hash_entry *bh;
252b5132
RH
681 struct elf32_arm_link_hash_table *hash_table;
682 char bind;
dc810e39 683 bfd_vma val;
252b5132
RH
684
685 hash_table = elf32_arm_hash_table (link_info);
686
687 BFD_ASSERT (hash_table != NULL);
688 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
689
690 s = bfd_get_section_by_name
691 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
692
693 BFD_ASSERT (s != NULL);
694
dc810e39
AM
695 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
696 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH
697
698 BFD_ASSERT (tmp_name);
699
700 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
701
702 myh = elf_link_hash_lookup
b34976b6 703 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH
704
705 if (myh != NULL)
706 {
9b485d32 707 /* We've already seen this guy. */
252b5132 708 free (tmp_name);
9b485d32 709 return;
252b5132
RH
710 }
711
14a793b2 712 bh = NULL;
dc810e39
AM
713 val = hash_table->thumb_glue_size + 1;
714 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
715 tmp_name, BSF_GLOBAL, s, val,
b34976b6 716 NULL, TRUE, FALSE, &bh);
252b5132 717
9b485d32 718 /* If we mark it 'Thumb', the disassembler will do a better job. */
14a793b2 719 myh = (struct elf_link_hash_entry *) bh;
252b5132
RH
720 bind = ELF_ST_BIND (myh->type);
721 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
722
723 free (tmp_name);
724
252b5132
RH
725#define CHANGE_TO_ARM "__%s_change_to_arm"
726#define BACK_FROM_ARM "__%s_back_from_arm"
727
9b485d32 728 /* Allocate another symbol to mark where we switch to Arm mode. */
dc810e39
AM
729 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
730 + strlen (CHANGE_TO_ARM) + 1);
252b5132
RH
731
732 BFD_ASSERT (tmp_name);
733
734 sprintf (tmp_name, CHANGE_TO_ARM, name);
735
14a793b2 736 bh = NULL;
dc810e39
AM
737 val = hash_table->thumb_glue_size + 4,
738 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
739 tmp_name, BSF_LOCAL, s, val,
b34976b6 740 NULL, TRUE, FALSE, &bh);
252b5132
RH
741
742 free (tmp_name);
743
744 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
745
746 return;
747}
748
8afb0e02
NC
749/* Add the glue sections to ABFD. This function is called from the
750 linker scripts in ld/emultempl/{armelf}.em. */
9b485d32 751
b34976b6 752bfd_boolean
8afb0e02 753bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info)
252b5132
RH
754 bfd *abfd;
755 struct bfd_link_info *info;
756{
252b5132
RH
757 flagword flags;
758 asection *sec;
759
8afb0e02
NC
760 /* If we are only performing a partial
761 link do not bother adding the glue. */
1049f94e 762 if (info->relocatable)
b34976b6 763 return TRUE;
252b5132 764
252b5132
RH
765 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
766
767 if (sec == NULL)
768 {
57db232e
NC
769 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
770 will prevent elf_link_input_bfd() from processing the contents
771 of this section. */
811b4bf6 772 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH
773
774 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
775
776 if (sec == NULL
777 || !bfd_set_section_flags (abfd, sec, flags)
778 || !bfd_set_section_alignment (abfd, sec, 2))
b34976b6 779 return FALSE;
9a5aca8c 780
57db232e
NC
781 /* Set the gc mark to prevent the section from being removed by garbage
782 collection, despite the fact that no relocs refer to this section. */
783 sec->gc_mark = 1;
252b5132
RH
784 }
785
786 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
787
788 if (sec == NULL)
789 {
811b4bf6 790 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH
791
792 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
793
794 if (sec == NULL
795 || !bfd_set_section_flags (abfd, sec, flags)
796 || !bfd_set_section_alignment (abfd, sec, 2))
b34976b6 797 return FALSE;
9a5aca8c 798
57db232e 799 sec->gc_mark = 1;
252b5132
RH
800 }
801
b34976b6 802 return TRUE;
8afb0e02
NC
803}
804
805/* Select a BFD to be used to hold the sections used by the glue code.
806 This function is called from the linker scripts in ld/emultempl/
807 {armelf/pe}.em */
808
b34976b6 809bfd_boolean
8afb0e02
NC
810bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
811 bfd *abfd;
812 struct bfd_link_info *info;
813{
814 struct elf32_arm_link_hash_table *globals;
815
816 /* If we are only performing a partial link
817 do not bother getting a bfd to hold the glue. */
1049f94e 818 if (info->relocatable)
b34976b6 819 return TRUE;
8afb0e02
NC
820
821 globals = elf32_arm_hash_table (info);
822
823 BFD_ASSERT (globals != NULL);
824
825 if (globals->bfd_of_glue_owner != NULL)
b34976b6 826 return TRUE;
8afb0e02 827
252b5132
RH
828 /* Save the bfd for later use. */
829 globals->bfd_of_glue_owner = abfd;
cedb70c5 830
b34976b6 831 return TRUE;
252b5132
RH
832}
833
b34976b6 834bfd_boolean
e489d0ae
PB
835bfd_elf32_arm_process_before_allocation (abfd, link_info,
836 no_pipeline_knowledge,
837 byteswap_code)
252b5132
RH
838 bfd *abfd;
839 struct bfd_link_info *link_info;
ba96a88f 840 int no_pipeline_knowledge;
e489d0ae 841 int byteswap_code;
252b5132
RH
842{
843 Elf_Internal_Shdr *symtab_hdr;
6cdc0ccc 844 Elf_Internal_Rela *internal_relocs = NULL;
252b5132
RH
845 Elf_Internal_Rela *irel, *irelend;
846 bfd_byte *contents = NULL;
252b5132
RH
847
848 asection *sec;
849 struct elf32_arm_link_hash_table *globals;
850
851 /* If we are only performing a partial link do not bother
852 to construct any glue. */
1049f94e 853 if (link_info->relocatable)
b34976b6 854 return TRUE;
252b5132
RH
855
856 /* Here we have a bfd that is to be included on the link. We have a hook
857 to do reloc rummaging, before section sizes are nailed down. */
252b5132
RH
858 globals = elf32_arm_hash_table (link_info);
859
860 BFD_ASSERT (globals != NULL);
861 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
862
ba96a88f 863 globals->no_pipeline_knowledge = no_pipeline_knowledge;
e489d0ae
PB
864 if (byteswap_code && !bfd_big_endian (abfd))
865 {
866 _bfd_error_handler (
867 _("%s: BE8 images only valid in big-endian mode."),
868 bfd_archive_filename (abfd));
869 return FALSE;
870 }
871 globals->byteswap_code = byteswap_code;
f21f3fe0 872
252b5132
RH
873 /* Rummage around all the relocs and map the glue vectors. */
874 sec = abfd->sections;
875
876 if (sec == NULL)
b34976b6 877 return TRUE;
252b5132
RH
878
879 for (; sec != NULL; sec = sec->next)
880 {
881 if (sec->reloc_count == 0)
882 continue;
883
884 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 885
9b485d32 886 /* Load the relocs. */
6cdc0ccc 887 internal_relocs
45d6a902
AM
888 = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL,
889 (Elf_Internal_Rela *) NULL, FALSE);
252b5132 890
6cdc0ccc
AM
891 if (internal_relocs == NULL)
892 goto error_return;
252b5132 893
6cdc0ccc
AM
894 irelend = internal_relocs + sec->reloc_count;
895 for (irel = internal_relocs; irel < irelend; irel++)
252b5132
RH
896 {
897 long r_type;
898 unsigned long r_index;
252b5132
RH
899
900 struct elf_link_hash_entry *h;
901
902 r_type = ELF32_R_TYPE (irel->r_info);
903 r_index = ELF32_R_SYM (irel->r_info);
904
9b485d32 905 /* These are the only relocation types we care about. */
ba96a88f 906 if ( r_type != R_ARM_PC24
252b5132
RH
907 && r_type != R_ARM_THM_PC22)
908 continue;
909
910 /* Get the section contents if we haven't done so already. */
911 if (contents == NULL)
912 {
913 /* Get cached copy if it exists. */
914 if (elf_section_data (sec)->this_hdr.contents != NULL)
915 contents = elf_section_data (sec)->this_hdr.contents;
916 else
917 {
918 /* Go get them off disk. */
919 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
920 if (contents == NULL)
921 goto error_return;
9b485d32 922
252b5132 923 if (!bfd_get_section_contents (abfd, sec, contents,
dc810e39 924 (file_ptr) 0, sec->_raw_size))
252b5132
RH
925 goto error_return;
926 }
927 }
928
a7c10850 929 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH
930 h = NULL;
931
9b485d32 932 /* We don't care about local symbols. */
252b5132
RH
933 if (r_index < symtab_hdr->sh_info)
934 continue;
935
9b485d32 936 /* This is an external symbol. */
252b5132
RH
937 r_index -= symtab_hdr->sh_info;
938 h = (struct elf_link_hash_entry *)
939 elf_sym_hashes (abfd)[r_index];
940
941 /* If the relocation is against a static symbol it must be within
942 the current section and so cannot be a cross ARM/Thumb relocation. */
943 if (h == NULL)
944 continue;
945
946 switch (r_type)
947 {
948 case R_ARM_PC24:
949 /* This one is a call from arm code. We need to look up
2f0ca46a 950 the target of the call. If it is a thumb target, we
252b5132 951 insert glue. */
252b5132
RH
952 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
953 record_arm_to_thumb_glue (link_info, h);
954 break;
955
956 case R_ARM_THM_PC22:
f21f3fe0 957 /* This one is a call from thumb code. We look
2f0ca46a 958 up the target of the call. If it is not a thumb
bcbdc74c 959 target, we insert glue. */
252b5132
RH
960 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
961 record_thumb_to_arm_glue (link_info, h);
962 break;
963
964 default:
965 break;
966 }
967 }
6cdc0ccc
AM
968
969 if (contents != NULL
970 && elf_section_data (sec)->this_hdr.contents != contents)
971 free (contents);
972 contents = NULL;
973
974 if (internal_relocs != NULL
975 && elf_section_data (sec)->relocs != internal_relocs)
976 free (internal_relocs);
977 internal_relocs = NULL;
252b5132
RH
978 }
979
b34976b6 980 return TRUE;
9a5aca8c 981
252b5132 982error_return:
6cdc0ccc
AM
983 if (contents != NULL
984 && elf_section_data (sec)->this_hdr.contents != contents)
985 free (contents);
986 if (internal_relocs != NULL
987 && elf_section_data (sec)->relocs != internal_relocs)
988 free (internal_relocs);
9a5aca8c 989
b34976b6 990 return FALSE;
252b5132 991}
7e392df6 992#endif
252b5132
RH
993
994/* The thumb form of a long branch is a bit finicky, because the offset
995 encoding is split over two fields, each in it's own instruction. They
f21f3fe0 996 can occur in any order. So given a thumb form of long branch, and an
252b5132 997 offset, insert the offset into the thumb branch and return finished
f21f3fe0 998 instruction.
252b5132 999
f21f3fe0 1000 It takes two thumb instructions to encode the target address. Each has
4cc11e76 1001 11 bits to invest. The upper 11 bits are stored in one (identified by
f21f3fe0
UD
1002 H-0.. see below), the lower 11 bits are stored in the other (identified
1003 by H-1).
252b5132 1004
f21f3fe0 1005 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH
1006 there you have it.
1007
1008 Op: 1111 = F,
1009 H-0, upper address-0 = 000
1010 Op: 1111 = F,
1011 H-1, lower address-0 = 800
1012
f21f3fe0 1013 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH
1014 the lower one first. It probably doesn't matter. krk@cygnus.com
1015
1016 XXX: Actually the order does matter. The second instruction (H-1)
1017 moves the computed address into the PC, so it must be the second one
1018 in the sequence. The problem, however is that whilst little endian code
1019 stores the instructions in HI then LOW order, big endian code does the
dfc5f959 1020 reverse. nickc@cygnus.com. */
252b5132 1021
dfc5f959
NC
1022#define LOW_HI_ORDER 0xF800F000
1023#define HI_LOW_ORDER 0xF000F800
252b5132
RH
1024
1025static insn32
1026insert_thumb_branch (br_insn, rel_off)
1027 insn32 br_insn;
1028 int rel_off;
1029{
1030 unsigned int low_bits;
1031 unsigned int high_bits;
1032
252b5132
RH
1033 BFD_ASSERT ((rel_off & 1) != 1);
1034
dfc5f959
NC
1035 rel_off >>= 1; /* Half word aligned address. */
1036 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
1037 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
252b5132
RH
1038
1039 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
1040 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
1041 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
1042 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
1043 else
9b485d32
NC
1044 /* FIXME: abort is probably not the right call. krk@cygnus.com */
1045 abort (); /* error - not a valid branch instruction form. */
252b5132 1046
252b5132
RH
1047 return br_insn;
1048}
1049
9b485d32
NC
1050/* Thumb code calling an ARM function. */
1051
252b5132
RH
1052static int
1053elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
1054 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC
1055 struct bfd_link_info * info;
1056 const char * name;
1057 bfd * input_bfd;
1058 bfd * output_bfd;
1059 asection * input_section;
1060 bfd_byte * hit_data;
1061 asection * sym_sec;
1062 bfd_vma offset;
1063 bfd_signed_vma addend;
1064 bfd_vma val;
252b5132 1065{
bcbdc74c 1066 asection * s = 0;
dc810e39 1067 bfd_vma my_offset;
252b5132
RH
1068 unsigned long int tmp;
1069 long int ret_offset;
bcbdc74c
NC
1070 struct elf_link_hash_entry * myh;
1071 struct elf32_arm_link_hash_table * globals;
252b5132
RH
1072
1073 myh = find_thumb_glue (info, name, input_bfd);
1074 if (myh == NULL)
b34976b6 1075 return FALSE;
252b5132
RH
1076
1077 globals = elf32_arm_hash_table (info);
1078
1079 BFD_ASSERT (globals != NULL);
1080 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1081
1082 my_offset = myh->root.u.def.value;
1083
1084 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1085 THUMB2ARM_GLUE_SECTION_NAME);
1086
1087 BFD_ASSERT (s != NULL);
1088 BFD_ASSERT (s->contents != NULL);
1089 BFD_ASSERT (s->output_section != NULL);
1090
1091 if ((my_offset & 0x01) == 0x01)
1092 {
1093 if (sym_sec != NULL
1094 && sym_sec->owner != NULL
1095 && !INTERWORK_FLAG (sym_sec->owner))
1096 {
8f615d07 1097 (*_bfd_error_handler)
9b485d32 1098 (_("%s(%s): warning: interworking not enabled."),
8f615d07
AM
1099 bfd_archive_filename (sym_sec->owner), name);
1100 (*_bfd_error_handler)
9b485d32 1101 (_(" first occurrence: %s: thumb call to arm"),
8f615d07 1102 bfd_archive_filename (input_bfd));
252b5132 1103
b34976b6 1104 return FALSE;
252b5132
RH
1105 }
1106
1107 --my_offset;
1108 myh->root.u.def.value = my_offset;
1109
dc810e39 1110 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
252b5132
RH
1111 s->contents + my_offset);
1112
dc810e39 1113 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
252b5132
RH
1114 s->contents + my_offset + 2);
1115
1116 ret_offset =
9b485d32
NC
1117 /* Address of destination of the stub. */
1118 ((bfd_signed_vma) val)
252b5132 1119 - ((bfd_signed_vma)
9b485d32
NC
1120 /* Offset from the start of the current section to the start of the stubs. */
1121 (s->output_offset
1122 /* Offset of the start of this stub from the start of the stubs. */
1123 + my_offset
1124 /* Address of the start of the current section. */
1125 + s->output_section->vma)
1126 /* The branch instruction is 4 bytes into the stub. */
1127 + 4
1128 /* ARM branches work from the pc of the instruction + 8. */
1129 + 8);
252b5132
RH
1130
1131 bfd_put_32 (output_bfd,
dc810e39 1132 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
252b5132
RH
1133 s->contents + my_offset + 4);
1134 }
1135
1136 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
1137
427bfd90
NC
1138 /* Now go back and fix up the original BL insn to point to here. */
1139 ret_offset =
1140 /* Address of where the stub is located. */
1141 (s->output_section->vma + s->output_offset + my_offset)
1142 /* Address of where the BL is located. */
1143 - (input_section->output_section->vma + input_section->output_offset + offset)
1144 /* Addend in the relocation. */
1145 - addend
1146 /* Biassing for PC-relative addressing. */
1147 - 8;
252b5132
RH
1148
1149 tmp = bfd_get_32 (input_bfd, hit_data
1150 - input_section->vma);
1151
1152 bfd_put_32 (output_bfd,
dc810e39 1153 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
252b5132
RH
1154 hit_data - input_section->vma);
1155
b34976b6 1156 return TRUE;
252b5132
RH
1157}
1158
9b485d32
NC
1159/* Arm code calling a Thumb function. */
1160
252b5132
RH
1161static int
1162elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
1163 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC
1164 struct bfd_link_info * info;
1165 const char * name;
1166 bfd * input_bfd;
1167 bfd * output_bfd;
1168 asection * input_section;
1169 bfd_byte * hit_data;
1170 asection * sym_sec;
1171 bfd_vma offset;
1172 bfd_signed_vma addend;
1173 bfd_vma val;
252b5132
RH
1174{
1175 unsigned long int tmp;
dc810e39 1176 bfd_vma my_offset;
bcbdc74c 1177 asection * s;
252b5132 1178 long int ret_offset;
bcbdc74c
NC
1179 struct elf_link_hash_entry * myh;
1180 struct elf32_arm_link_hash_table * globals;
252b5132
RH
1181
1182 myh = find_arm_glue (info, name, input_bfd);
1183 if (myh == NULL)
b34976b6 1184 return FALSE;
252b5132
RH
1185
1186 globals = elf32_arm_hash_table (info);
1187
1188 BFD_ASSERT (globals != NULL);
1189 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1190
1191 my_offset = myh->root.u.def.value;
1192 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1193 ARM2THUMB_GLUE_SECTION_NAME);
1194 BFD_ASSERT (s != NULL);
1195 BFD_ASSERT (s->contents != NULL);
1196 BFD_ASSERT (s->output_section != NULL);
1197
1198 if ((my_offset & 0x01) == 0x01)
1199 {
1200 if (sym_sec != NULL
1201 && sym_sec->owner != NULL
1202 && !INTERWORK_FLAG (sym_sec->owner))
1203 {
8f615d07 1204 (*_bfd_error_handler)
9b485d32 1205 (_("%s(%s): warning: interworking not enabled."),
8f615d07
AM
1206 bfd_archive_filename (sym_sec->owner), name);
1207 (*_bfd_error_handler)
9b485d32 1208 (_(" first occurrence: %s: arm call to thumb"),
8f615d07 1209 bfd_archive_filename (input_bfd));
252b5132 1210 }
9b485d32 1211
252b5132
RH
1212 --my_offset;
1213 myh->root.u.def.value = my_offset;
1214
dc810e39 1215 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
252b5132
RH
1216 s->contents + my_offset);
1217
dc810e39 1218 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
252b5132
RH
1219 s->contents + my_offset + 4);
1220
1221 /* It's a thumb address. Add the low order bit. */
1222 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
1223 s->contents + my_offset + 8);
1224 }
1225
1226 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1227
1228 tmp = bfd_get_32 (input_bfd, hit_data);
1229 tmp = tmp & 0xFF000000;
1230
9b485d32 1231 /* Somehow these are both 4 too far, so subtract 8. */
dc810e39
AM
1232 ret_offset = (s->output_offset
1233 + my_offset
1234 + s->output_section->vma
1235 - (input_section->output_offset
1236 + input_section->output_section->vma
1237 + offset + addend)
1238 - 8);
9a5aca8c 1239
252b5132
RH
1240 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
1241
dc810e39 1242 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
252b5132 1243
b34976b6 1244 return TRUE;
252b5132
RH
1245}
1246
1247/* Perform a relocation as part of a final link. */
9b485d32 1248
252b5132
RH
1249static bfd_reloc_status_type
1250elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1251 input_section, contents, rel, value,
780a67af 1252 info, sym_sec, sym_name, sym_flags, h)
252b5132
RH
1253 reloc_howto_type * howto;
1254 bfd * input_bfd;
1255 bfd * output_bfd;
1256 asection * input_section;
1257 bfd_byte * contents;
1258 Elf_Internal_Rela * rel;
1259 bfd_vma value;
1260 struct bfd_link_info * info;
1261 asection * sym_sec;
1262 const char * sym_name;
dc810e39 1263 int sym_flags;
780a67af 1264 struct elf_link_hash_entry * h;
252b5132
RH
1265{
1266 unsigned long r_type = howto->type;
1267 unsigned long r_symndx;
1268 bfd_byte * hit_data = contents + rel->r_offset;
1269 bfd * dynobj = NULL;
1270 Elf_Internal_Shdr * symtab_hdr;
1271 struct elf_link_hash_entry ** sym_hashes;
1272 bfd_vma * local_got_offsets;
1273 asection * sgot = NULL;
1274 asection * splt = NULL;
1275 asection * sreloc = NULL;
252b5132 1276 bfd_vma addend;
ba96a88f
NC
1277 bfd_signed_vma signed_addend;
1278 struct elf32_arm_link_hash_table * globals;
f21f3fe0 1279
cac15327
NC
1280 /* If the start address has been set, then set the EF_ARM_HASENTRY
1281 flag. Setting this more than once is redundant, but the cost is
1282 not too high, and it keeps the code simple.
99e4ae17 1283
cac15327
NC
1284 The test is done here, rather than somewhere else, because the
1285 start address is only set just before the final link commences.
1286
1287 Note - if the user deliberately sets a start address of 0, the
1288 flag will not be set. */
1289 if (bfd_get_start_address (output_bfd) != 0)
1290 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
99e4ae17 1291
ba96a88f 1292 globals = elf32_arm_hash_table (info);
f21f3fe0 1293
252b5132
RH
1294 dynobj = elf_hash_table (info)->dynobj;
1295 if (dynobj)
1296 {
1297 sgot = bfd_get_section_by_name (dynobj, ".got");
1298 splt = bfd_get_section_by_name (dynobj, ".plt");
1299 }
1300 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1301 sym_hashes = elf_sym_hashes (input_bfd);
1302 local_got_offsets = elf_local_got_offsets (input_bfd);
1303 r_symndx = ELF32_R_SYM (rel->r_info);
1304
acf8aed4 1305#if USE_REL
ba96a88f
NC
1306 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1307
1308 if (addend & ((howto->src_mask + 1) >> 1))
1309 {
1310 signed_addend = -1;
1311 signed_addend &= ~ howto->src_mask;
1312 signed_addend |= addend;
1313 }
1314 else
1315 signed_addend = addend;
252b5132 1316#else
ba96a88f 1317 addend = signed_addend = rel->r_addend;
252b5132 1318#endif
f21f3fe0 1319
252b5132
RH
1320 switch (r_type)
1321 {
1322 case R_ARM_NONE:
1323 return bfd_reloc_ok;
1324
1325 case R_ARM_PC24:
1326 case R_ARM_ABS32:
1327 case R_ARM_REL32:
dfc5f959
NC
1328#ifndef OLD_ARM_ABI
1329 case R_ARM_XPC25:
1330#endif
7359ea65 1331 case R_ARM_PLT32:
5e681ec4
PB
1332 /* r_symndx will be zero only for relocs against symbols
1333 from removed linkonce sections, or sections discarded by
1334 a linker script. */
1335 if (r_symndx == 0)
1336 return bfd_reloc_ok;
1337
7359ea65
DJ
1338 /* Handle relocations which should use the PLT entry. ABS32/REL32
1339 will use the symbol's value, which may point to a PLT entry, but we
1340 don't need to handle that here. If we created a PLT entry, all
1341 branches in this object should go to it. */
1342 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
1343 && h != NULL
c84cd8ee 1344 && splt != NULL
7359ea65
DJ
1345 && h->plt.offset != (bfd_vma) -1)
1346 {
c84cd8ee
DJ
1347 /* If we've created a .plt section, and assigned a PLT entry to
1348 this function, it should not be known to bind locally. If
1349 it were, we would have cleared the PLT entry. */
7359ea65
DJ
1350 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
1351
1352 value = (splt->output_section->vma
1353 + splt->output_offset
1354 + h->plt.offset);
1355 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1356 contents, rel->r_offset, value,
1357 (bfd_vma) 0);
1358 }
1359
252b5132 1360 /* When generating a shared object, these relocations are copied
9b485d32 1361 into the output file to be resolved at run time. */
7359ea65
DJ
1362 if (info->shared
1363 && (input_section->flags & SEC_ALLOC)
1364 && (h == NULL
1365 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1366 || h->root.type != bfd_link_hash_undefweak)
1367 && r_type != R_ARM_PC24
1368 && r_type != R_ARM_PLT32)
252b5132 1369 {
947216bf
AM
1370 Elf_Internal_Rela outrel;
1371 bfd_byte *loc;
b34976b6 1372 bfd_boolean skip, relocate;
f21f3fe0 1373
252b5132
RH
1374 if (sreloc == NULL)
1375 {
1376 const char * name;
f21f3fe0 1377
252b5132
RH
1378 name = (bfd_elf_string_from_elf_section
1379 (input_bfd,
1380 elf_elfheader (input_bfd)->e_shstrndx,
1381 elf_section_data (input_section)->rel_hdr.sh_name));
1382 if (name == NULL)
1383 return bfd_reloc_notsupported;
f21f3fe0 1384
252b5132
RH
1385 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1386 && strcmp (bfd_get_section_name (input_bfd,
1387 input_section),
1388 name + 4) == 0);
f21f3fe0 1389
252b5132
RH
1390 sreloc = bfd_get_section_by_name (dynobj, name);
1391 BFD_ASSERT (sreloc != NULL);
1392 }
f21f3fe0 1393
b34976b6
AM
1394 skip = FALSE;
1395 relocate = FALSE;
f21f3fe0 1396
c629eae0
JJ
1397 outrel.r_offset =
1398 _bfd_elf_section_offset (output_bfd, info, input_section,
1399 rel->r_offset);
1400 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 1401 skip = TRUE;
0bb2d96a 1402 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 1403 skip = TRUE, relocate = TRUE;
252b5132
RH
1404 outrel.r_offset += (input_section->output_section->vma
1405 + input_section->output_offset);
f21f3fe0 1406
252b5132 1407 if (skip)
0bb2d96a 1408 memset (&outrel, 0, sizeof outrel);
5e681ec4
PB
1409 else if (h != NULL
1410 && h->dynindx != -1
7359ea65 1411 && (!info->shared
5e681ec4
PB
1412 || !info->symbolic
1413 || (h->elf_link_hash_flags
1414 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1415 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH
1416 else
1417 {
5e681ec4
PB
1418 /* This symbol is local, or marked to become local. */
1419 relocate = TRUE;
1420 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
252b5132 1421 }
f21f3fe0 1422
947216bf
AM
1423 loc = sreloc->contents;
1424 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
1425 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
9a5aca8c 1426
f21f3fe0 1427 /* If this reloc is against an external symbol, we do not want to
252b5132 1428 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 1429 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH
1430 if (! relocate)
1431 return bfd_reloc_ok;
9a5aca8c 1432
f21f3fe0 1433 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH
1434 contents, rel->r_offset, value,
1435 (bfd_vma) 0);
1436 }
1437 else switch (r_type)
1438 {
dfc5f959
NC
1439#ifndef OLD_ARM_ABI
1440 case R_ARM_XPC25: /* Arm BLX instruction. */
1441#endif
1442 case R_ARM_PC24: /* Arm B/BL instruction */
7359ea65 1443 case R_ARM_PLT32:
dfc5f959
NC
1444#ifndef OLD_ARM_ABI
1445 if (r_type == R_ARM_XPC25)
252b5132 1446 {
dfc5f959
NC
1447 /* Check for Arm calling Arm function. */
1448 /* FIXME: Should we translate the instruction into a BL
1449 instruction instead ? */
1450 if (sym_flags != STT_ARM_TFUNC)
8f615d07 1451 (*_bfd_error_handler) (_("\
dfc5f959 1452%s: Warning: Arm BLX instruction targets Arm function '%s'."),
8f615d07
AM
1453 bfd_archive_filename (input_bfd),
1454 h ? h->root.root.string : "(local)");
dfc5f959
NC
1455 }
1456 else
1457#endif
1458 {
1459 /* Check for Arm calling Thumb function. */
1460 if (sym_flags == STT_ARM_TFUNC)
1461 {
1462 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1463 input_section, hit_data, sym_sec, rel->r_offset,
1464 signed_addend, value);
1465 return bfd_reloc_ok;
1466 }
252b5132 1467 }
ba96a88f
NC
1468
1469 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1470 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1471 {
1472 /* The old way of doing things. Trearing the addend as a
1473 byte sized field and adding in the pipeline offset. */
ba96a88f
NC
1474 value -= (input_section->output_section->vma
1475 + input_section->output_offset);
1476 value -= rel->r_offset;
1477 value += addend;
f21f3fe0 1478
ba96a88f
NC
1479 if (! globals->no_pipeline_knowledge)
1480 value -= 8;
1481 }
1482 else
1483 {
1484 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1485 where:
1486 S is the address of the symbol in the relocation.
1487 P is address of the instruction being relocated.
1488 A is the addend (extracted from the instruction) in bytes.
f21f3fe0 1489
ba96a88f
NC
1490 S is held in 'value'.
1491 P is the base address of the section containing the instruction
1492 plus the offset of the reloc into that section, ie:
1493 (input_section->output_section->vma +
1494 input_section->output_offset +
1495 rel->r_offset).
1496 A is the addend, converted into bytes, ie:
1497 (signed_addend * 4)
1498
1499 Note: None of these operations have knowledge of the pipeline
1500 size of the processor, thus it is up to the assembler to encode
1501 this information into the addend. */
ba96a88f
NC
1502 value -= (input_section->output_section->vma
1503 + input_section->output_offset);
1504 value -= rel->r_offset;
1505 value += (signed_addend << howto->size);
f21f3fe0 1506
ba96a88f
NC
1507 /* Previous versions of this code also used to add in the pipeline
1508 offset here. This is wrong because the linker is not supposed
1509 to know about such things, and one day it might change. In order
1510 to support old binaries that need the old behaviour however, so
1511 we attempt to detect which ABI was used to create the reloc. */
1512 if (! globals->no_pipeline_knowledge)
f21f3fe0 1513 {
ba96a88f 1514 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
f21f3fe0 1515
ba96a88f 1516 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1517
ba96a88f
NC
1518 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1519 value -= 8;
1520 }
1521 }
23080146 1522
dcb5e6e6
NC
1523 signed_addend = value;
1524 signed_addend >>= howto->rightshift;
9a5aca8c 1525
59f2c4e7
NC
1526 /* It is not an error for an undefined weak reference to be
1527 out of range. Any program that branches to such a symbol
9a5aca8c
AM
1528 is going to crash anyway, so there is no point worrying
1529 about getting the destination exactly right. */
59f2c4e7
NC
1530 if (! h || h->root.type != bfd_link_hash_undefweak)
1531 {
9b485d32 1532 /* Perform a signed range check. */
dcb5e6e6 1533 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC
1534 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1535 return bfd_reloc_overflow;
1536 }
9a5aca8c 1537
dcb5e6e6
NC
1538#ifndef OLD_ARM_ABI
1539 /* If necessary set the H bit in the BLX instruction. */
1540 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1541 value = (signed_addend & howto->dst_mask)
1542 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1543 | (1 << 24);
1544 else
1545#endif
1546 value = (signed_addend & howto->dst_mask)
1547 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 1548 break;
f21f3fe0 1549
252b5132
RH
1550 case R_ARM_ABS32:
1551 value += addend;
1552 if (sym_flags == STT_ARM_TFUNC)
1553 value |= 1;
1554 break;
f21f3fe0 1555
252b5132
RH
1556 case R_ARM_REL32:
1557 value -= (input_section->output_section->vma
62efb346 1558 + input_section->output_offset + rel->r_offset);
252b5132
RH
1559 value += addend;
1560 break;
1561 }
f21f3fe0 1562
252b5132
RH
1563 bfd_put_32 (input_bfd, value, hit_data);
1564 return bfd_reloc_ok;
1565
1566 case R_ARM_ABS8:
1567 value += addend;
1568 if ((long) value > 0x7f || (long) value < -0x80)
1569 return bfd_reloc_overflow;
1570
1571 bfd_put_8 (input_bfd, value, hit_data);
1572 return bfd_reloc_ok;
1573
1574 case R_ARM_ABS16:
1575 value += addend;
1576
1577 if ((long) value > 0x7fff || (long) value < -0x8000)
1578 return bfd_reloc_overflow;
1579
1580 bfd_put_16 (input_bfd, value, hit_data);
1581 return bfd_reloc_ok;
1582
1583 case R_ARM_ABS12:
1584 /* Support ldr and str instruction for the arm */
1585 /* Also thumb b (unconditional branch). ??? Really? */
1586 value += addend;
1587
1588 if ((long) value > 0x7ff || (long) value < -0x800)
1589 return bfd_reloc_overflow;
1590
1591 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1592 bfd_put_32 (input_bfd, value, hit_data);
1593 return bfd_reloc_ok;
1594
1595 case R_ARM_THM_ABS5:
9b485d32 1596 /* Support ldr and str instructions for the thumb. */
acf8aed4 1597#if USE_REL
252b5132
RH
1598 /* Need to refetch addend. */
1599 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1600 /* ??? Need to determine shift amount from operand size. */
1601 addend >>= howto->rightshift;
1602#endif
1603 value += addend;
1604
1605 /* ??? Isn't value unsigned? */
1606 if ((long) value > 0x1f || (long) value < -0x10)
1607 return bfd_reloc_overflow;
1608
1609 /* ??? Value needs to be properly shifted into place first. */
1610 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1611 bfd_put_16 (input_bfd, value, hit_data);
1612 return bfd_reloc_ok;
1613
dfc5f959
NC
1614#ifndef OLD_ARM_ABI
1615 case R_ARM_THM_XPC22:
1616#endif
252b5132 1617 case R_ARM_THM_PC22:
dfc5f959 1618 /* Thumb BL (branch long instruction). */
252b5132 1619 {
b34976b6
AM
1620 bfd_vma relocation;
1621 bfd_boolean overflow = FALSE;
1622 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1623 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
df212a7e 1624 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
ba96a88f 1625 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
b34976b6 1626 bfd_vma check;
252b5132 1627 bfd_signed_vma signed_check;
252b5132 1628
acf8aed4 1629#if USE_REL
252b5132
RH
1630 /* Need to refetch the addend and squish the two 11 bit pieces
1631 together. */
1632 {
ba96a88f
NC
1633 bfd_vma upper = upper_insn & 0x7ff;
1634 bfd_vma lower = lower_insn & 0x7ff;
9b485d32 1635 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
252b5132 1636 addend = (upper << 12) | (lower << 1);
ba96a88f 1637 signed_addend = addend;
252b5132
RH
1638 }
1639#endif
dfc5f959
NC
1640#ifndef OLD_ARM_ABI
1641 if (r_type == R_ARM_THM_XPC22)
1642 {
1643 /* Check for Thumb to Thumb call. */
1644 /* FIXME: Should we translate the instruction into a BL
1645 instruction instead ? */
1646 if (sym_flags == STT_ARM_TFUNC)
8f615d07 1647 (*_bfd_error_handler) (_("\
dfc5f959 1648%s: Warning: Thumb BLX instruction targets thumb function '%s'."),
8f615d07
AM
1649 bfd_archive_filename (input_bfd),
1650 h ? h->root.root.string : "(local)");
dfc5f959
NC
1651 }
1652 else
1653#endif
252b5132 1654 {
dfc5f959
NC
1655 /* If it is not a call to Thumb, assume call to Arm.
1656 If it is a call relative to a section name, then it is not a
1657 function call at all, but rather a long jump. */
1658 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1659 {
1660 if (elf32_thumb_to_arm_stub
1661 (info, sym_name, input_bfd, output_bfd, input_section,
1662 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1663 return bfd_reloc_ok;
1664 else
1665 return bfd_reloc_dangerous;
1666 }
252b5132 1667 }
f21f3fe0 1668
ba96a88f 1669 relocation = value + signed_addend;
f21f3fe0 1670
252b5132 1671 relocation -= (input_section->output_section->vma
ba96a88f
NC
1672 + input_section->output_offset
1673 + rel->r_offset);
9a5aca8c 1674
ba96a88f
NC
1675 if (! globals->no_pipeline_knowledge)
1676 {
9b485d32 1677 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
9a5aca8c 1678
ba96a88f 1679 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1680
ba96a88f
NC
1681 /* Previous versions of this code also used to add in the pipline
1682 offset here. This is wrong because the linker is not supposed
1683 to know about such things, and one day it might change. In order
1684 to support old binaries that need the old behaviour however, so
1685 we attempt to detect which ABI was used to create the reloc. */
1686 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1687 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1688 || i_ehdrp->e_ident[EI_OSABI] == 0)
1689 relocation += 4;
1690 }
f21f3fe0 1691
252b5132
RH
1692 check = relocation >> howto->rightshift;
1693
1694 /* If this is a signed value, the rightshift just dropped
1695 leading 1 bits (assuming twos complement). */
1696 if ((bfd_signed_vma) relocation >= 0)
1697 signed_check = check;
1698 else
1699 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1700
252b5132 1701 /* Assumes two's complement. */
ba96a88f 1702 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
b34976b6 1703 overflow = TRUE;
252b5132 1704
df425bc0 1705#ifndef OLD_ARM_ABI
4f3c3dbb
NC
1706 if (r_type == R_ARM_THM_XPC22
1707 && ((lower_insn & 0x1800) == 0x0800))
c62e1cc3
NC
1708 /* For a BLX instruction, make sure that the relocation is rounded up
1709 to a word boundary. This follows the semantics of the instruction
1710 which specifies that bit 1 of the target address will come from bit
1711 1 of the base address. */
1712 relocation = (relocation + 2) & ~ 3;
99e4ae17 1713#endif
c62e1cc3
NC
1714 /* Put RELOCATION back into the insn. */
1715 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1716 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1717
252b5132
RH
1718 /* Put the relocated value back in the object file: */
1719 bfd_put_16 (input_bfd, upper_insn, hit_data);
1720 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1721
1722 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1723 }
1724 break;
1725
51c5503b
NC
1726 case R_ARM_THM_PC11:
1727 /* Thumb B (branch) instruction). */
1728 {
6cf9e9fe 1729 bfd_signed_vma relocation;
51c5503b
NC
1730 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1731 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
51c5503b
NC
1732 bfd_signed_vma signed_check;
1733
acf8aed4 1734#if USE_REL
51c5503b
NC
1735 /* Need to refetch addend. */
1736 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6cf9e9fe
NC
1737 if (addend & ((howto->src_mask + 1) >> 1))
1738 {
1739 signed_addend = -1;
1740 signed_addend &= ~ howto->src_mask;
1741 signed_addend |= addend;
1742 }
1743 else
1744 signed_addend = addend;
1745 /* The value in the insn has been right shifted. We need to
1746 undo this, so that we can perform the address calculation
1747 in terms of bytes. */
1748 signed_addend <<= howto->rightshift;
51c5503b 1749#endif
6cf9e9fe 1750 relocation = value + signed_addend;
51c5503b
NC
1751
1752 relocation -= (input_section->output_section->vma
1753 + input_section->output_offset
1754 + rel->r_offset);
1755
6cf9e9fe
NC
1756 relocation >>= howto->rightshift;
1757 signed_check = relocation;
1758 relocation &= howto->dst_mask;
51c5503b 1759 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
cedb70c5 1760
51c5503b
NC
1761 bfd_put_16 (input_bfd, relocation, hit_data);
1762
1763 /* Assumes two's complement. */
1764 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1765 return bfd_reloc_overflow;
1766
1767 return bfd_reloc_ok;
1768 }
cedb70c5 1769
1f433d93 1770#ifndef OLD_ARM_ABI
8375c36b
PB
1771 case R_ARM_ALU_PCREL7_0:
1772 case R_ARM_ALU_PCREL15_8:
1773 case R_ARM_ALU_PCREL23_15:
1774 {
1775 bfd_vma insn;
1776 bfd_vma relocation;
1777
1778 insn = bfd_get_32 (input_bfd, hit_data);
1779#if USE_REL
1780 /* Extract the addend. */
1781 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
1782 signed_addend = addend;
1783#endif
1784 relocation = value + signed_addend;
1785
1786 relocation -= (input_section->output_section->vma
1787 + input_section->output_offset
1788 + rel->r_offset);
1789 insn = (insn & ~0xfff)
1790 | ((howto->bitpos << 7) & 0xf00)
1791 | ((relocation >> howto->bitpos) & 0xff);
1792 bfd_put_32 (input_bfd, value, hit_data);
1793 }
1794 return bfd_reloc_ok;
1f433d93 1795#endif
8375c36b 1796
252b5132
RH
1797 case R_ARM_GNU_VTINHERIT:
1798 case R_ARM_GNU_VTENTRY:
1799 return bfd_reloc_ok;
1800
1801 case R_ARM_COPY:
1802 return bfd_reloc_notsupported;
1803
1804 case R_ARM_GLOB_DAT:
1805 return bfd_reloc_notsupported;
1806
1807 case R_ARM_JUMP_SLOT:
1808 return bfd_reloc_notsupported;
1809
1810 case R_ARM_RELATIVE:
1811 return bfd_reloc_notsupported;
1812
1813 case R_ARM_GOTOFF:
1814 /* Relocation is relative to the start of the
1815 global offset table. */
1816
1817 BFD_ASSERT (sgot != NULL);
1818 if (sgot == NULL)
1819 return bfd_reloc_notsupported;
9a5aca8c 1820
cedb70c5 1821 /* If we are addressing a Thumb function, we need to adjust the
ee29b9fb
RE
1822 address by one, so that attempts to call the function pointer will
1823 correctly interpret it as Thumb code. */
1824 if (sym_flags == STT_ARM_TFUNC)
1825 value += 1;
1826
252b5132
RH
1827 /* Note that sgot->output_offset is not involved in this
1828 calculation. We always want the start of .got. If we
1829 define _GLOBAL_OFFSET_TABLE in a different way, as is
1830 permitted by the ABI, we might have to change this
9b485d32 1831 calculation. */
252b5132 1832 value -= sgot->output_section->vma;
f21f3fe0 1833 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ
1834 contents, rel->r_offset, value,
1835 (bfd_vma) 0);
252b5132
RH
1836
1837 case R_ARM_GOTPC:
a7c10850 1838 /* Use global offset table as symbol value. */
252b5132 1839 BFD_ASSERT (sgot != NULL);
f21f3fe0 1840
252b5132
RH
1841 if (sgot == NULL)
1842 return bfd_reloc_notsupported;
1843
1844 value = sgot->output_section->vma;
f21f3fe0 1845 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ
1846 contents, rel->r_offset, value,
1847 (bfd_vma) 0);
f21f3fe0 1848
252b5132
RH
1849 case R_ARM_GOT32:
1850 /* Relocation is to the entry for this symbol in the
9b485d32 1851 global offset table. */
252b5132
RH
1852 if (sgot == NULL)
1853 return bfd_reloc_notsupported;
f21f3fe0 1854
252b5132
RH
1855 if (h != NULL)
1856 {
1857 bfd_vma off;
5e681ec4 1858 bfd_boolean dyn;
f21f3fe0 1859
252b5132
RH
1860 off = h->got.offset;
1861 BFD_ASSERT (off != (bfd_vma) -1);
5e681ec4 1862 dyn = globals->root.dynamic_sections_created;
f21f3fe0 1863
5e681ec4 1864 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
50d6c878 1865 || (info->shared
5e681ec4
PB
1866 && SYMBOL_REFERENCES_LOCAL (info, h))
1867 || (ELF_ST_VISIBILITY (h->other)
1868 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH
1869 {
1870 /* This is actually a static link, or it is a -Bsymbolic link
1871 and the symbol is defined locally. We must initialize this
1872 entry in the global offset table. Since the offset must
1873 always be a multiple of 4, we use the least significant bit
1874 to record whether we have initialized it already.
f21f3fe0 1875
252b5132 1876 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1877 entry to initialize the value. This is done in the
9b485d32 1878 finish_dynamic_symbol routine. */
252b5132
RH
1879 if ((off & 1) != 0)
1880 off &= ~1;
1881 else
1882 {
ee29b9fb
RE
1883 /* If we are addressing a Thumb function, we need to
1884 adjust the address by one, so that attempts to
1885 call the function pointer will correctly
1886 interpret it as Thumb code. */
1887 if (sym_flags == STT_ARM_TFUNC)
1888 value |= 1;
1889
252b5132
RH
1890 bfd_put_32 (output_bfd, value, sgot->contents + off);
1891 h->got.offset |= 1;
1892 }
1893 }
f21f3fe0 1894
252b5132
RH
1895 value = sgot->output_offset + off;
1896 }
1897 else
1898 {
1899 bfd_vma off;
f21f3fe0 1900
252b5132
RH
1901 BFD_ASSERT (local_got_offsets != NULL &&
1902 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1903
252b5132 1904 off = local_got_offsets[r_symndx];
f21f3fe0 1905
252b5132
RH
1906 /* The offset must always be a multiple of 4. We use the
1907 least significant bit to record whether we have already
9b485d32 1908 generated the necessary reloc. */
252b5132
RH
1909 if ((off & 1) != 0)
1910 off &= ~1;
1911 else
1912 {
1913 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1914
252b5132
RH
1915 if (info->shared)
1916 {
1917 asection * srelgot;
947216bf
AM
1918 Elf_Internal_Rela outrel;
1919 bfd_byte *loc;
f21f3fe0 1920
252b5132
RH
1921 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1922 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1923
252b5132 1924 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1925 + sgot->output_offset
252b5132
RH
1926 + off);
1927 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
947216bf
AM
1928 loc = srelgot->contents;
1929 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
1930 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132 1931 }
f21f3fe0 1932
252b5132
RH
1933 local_got_offsets[r_symndx] |= 1;
1934 }
f21f3fe0 1935
252b5132
RH
1936 value = sgot->output_offset + off;
1937 }
9a5aca8c 1938
f21f3fe0 1939 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ
1940 contents, rel->r_offset, value,
1941 (bfd_vma) 0);
f21f3fe0 1942
252b5132
RH
1943 case R_ARM_SBREL32:
1944 return bfd_reloc_notsupported;
1945
1946 case R_ARM_AMP_VCALL9:
1947 return bfd_reloc_notsupported;
1948
1949 case R_ARM_RSBREL32:
1950 return bfd_reloc_notsupported;
1951
1952 case R_ARM_THM_RPC22:
1953 return bfd_reloc_notsupported;
1954
1955 case R_ARM_RREL32:
1956 return bfd_reloc_notsupported;
1957
1958 case R_ARM_RABS32:
1959 return bfd_reloc_notsupported;
1960
1961 case R_ARM_RPC24:
1962 return bfd_reloc_notsupported;
1963
1964 case R_ARM_RBASE:
1965 return bfd_reloc_notsupported;
1966
1967 default:
1968 return bfd_reloc_notsupported;
1969 }
1970}
1971
acf8aed4 1972#if USE_REL
98c1d4aa
NC
1973/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1974static void
1975arm_add_to_rel (abfd, address, howto, increment)
1976 bfd * abfd;
59f2c4e7 1977 bfd_byte * address;
98c1d4aa
NC
1978 reloc_howto_type * howto;
1979 bfd_signed_vma increment;
1980{
98c1d4aa
NC
1981 bfd_signed_vma addend;
1982
9a5aca8c 1983 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 1984 {
9a5aca8c
AM
1985 int upper_insn, lower_insn;
1986 int upper, lower;
98c1d4aa 1987
9a5aca8c
AM
1988 upper_insn = bfd_get_16 (abfd, address);
1989 lower_insn = bfd_get_16 (abfd, address + 2);
1990 upper = upper_insn & 0x7ff;
1991 lower = lower_insn & 0x7ff;
1992
1993 addend = (upper << 12) | (lower << 1);
ddda4409 1994 addend += increment;
9a5aca8c 1995 addend >>= 1;
98c1d4aa 1996
9a5aca8c
AM
1997 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1998 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1999
dc810e39
AM
2000 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
2001 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM
2002 }
2003 else
2004 {
2005 bfd_vma contents;
2006
2007 contents = bfd_get_32 (abfd, address);
2008
2009 /* Get the (signed) value from the instruction. */
2010 addend = contents & howto->src_mask;
2011 if (addend & ((howto->src_mask + 1) >> 1))
2012 {
2013 bfd_signed_vma mask;
2014
2015 mask = -1;
2016 mask &= ~ howto->src_mask;
2017 addend |= mask;
2018 }
2019
2020 /* Add in the increment, (which is a byte value). */
2021 switch (howto->type)
2022 {
2023 default:
2024 addend += increment;
2025 break;
2026
2027 case R_ARM_PC24:
2028 addend <<= howto->size;
dc810e39 2029 addend += increment;
9a5aca8c
AM
2030
2031 /* Should we check for overflow here ? */
2032
2033 /* Drop any undesired bits. */
2034 addend >>= howto->rightshift;
2035 break;
2036 }
2037
2038 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
2039
2040 bfd_put_32 (abfd, contents, address);
ddda4409 2041 }
98c1d4aa
NC
2042}
2043#endif /* USE_REL */
252b5132
RH
2044
2045/* Relocate an ARM ELF section. */
b34976b6 2046static bfd_boolean
252b5132
RH
2047elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
2048 contents, relocs, local_syms, local_sections)
b34976b6
AM
2049 bfd *output_bfd;
2050 struct bfd_link_info *info;
2051 bfd *input_bfd;
2052 asection *input_section;
2053 bfd_byte *contents;
2054 Elf_Internal_Rela *relocs;
2055 Elf_Internal_Sym *local_syms;
2056 asection **local_sections;
252b5132 2057{
b34976b6
AM
2058 Elf_Internal_Shdr *symtab_hdr;
2059 struct elf_link_hash_entry **sym_hashes;
2060 Elf_Internal_Rela *rel;
2061 Elf_Internal_Rela *relend;
2062 const char *name;
252b5132 2063
acf8aed4 2064#if !USE_REL
1049f94e 2065 if (info->relocatable)
b34976b6 2066 return TRUE;
b491616a
AM
2067#endif
2068
252b5132
RH
2069 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2070 sym_hashes = elf_sym_hashes (input_bfd);
2071
2072 rel = relocs;
2073 relend = relocs + input_section->reloc_count;
2074 for (; rel < relend; rel++)
2075 {
ba96a88f
NC
2076 int r_type;
2077 reloc_howto_type * howto;
2078 unsigned long r_symndx;
2079 Elf_Internal_Sym * sym;
2080 asection * sec;
252b5132 2081 struct elf_link_hash_entry * h;
ba96a88f
NC
2082 bfd_vma relocation;
2083 bfd_reloc_status_type r;
2084 arelent bfd_reloc;
f21f3fe0 2085
252b5132 2086 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 2087 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 2088
ba96a88f
NC
2089 if ( r_type == R_ARM_GNU_VTENTRY
2090 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH
2091 continue;
2092
dc810e39 2093 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
ba96a88f 2094 howto = bfd_reloc.howto;
252b5132 2095
acf8aed4 2096#if USE_REL
1049f94e 2097 if (info->relocatable)
252b5132 2098 {
1049f94e 2099 /* This is a relocatable link. We don't have to change
252b5132
RH
2100 anything, unless the reloc is against a section symbol,
2101 in which case we have to adjust according to where the
2102 section symbol winds up in the output section. */
2103 if (r_symndx < symtab_hdr->sh_info)
2104 {
2105 sym = local_syms + r_symndx;
2106 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2107 {
2108 sec = local_sections[r_symndx];
98c1d4aa 2109 arm_add_to_rel (input_bfd, contents + rel->r_offset,
dc810e39
AM
2110 howto,
2111 (bfd_signed_vma) (sec->output_offset
2112 + sym->st_value));
252b5132
RH
2113 }
2114 }
2115
2116 continue;
2117 }
b491616a 2118#endif
252b5132
RH
2119
2120 /* This is a final link. */
2121 h = NULL;
2122 sym = NULL;
2123 sec = NULL;
9b485d32 2124
252b5132
RH
2125 if (r_symndx < symtab_hdr->sh_info)
2126 {
2127 sym = local_syms + r_symndx;
2128 sec = local_sections[r_symndx];
acf8aed4 2129#if USE_REL
252b5132
RH
2130 relocation = (sec->output_section->vma
2131 + sec->output_offset
2132 + sym->st_value);
f8df10f4
JJ
2133 if ((sec->flags & SEC_MERGE)
2134 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2135 {
2136 asection *msec;
2137 bfd_vma addend, value;
2138
2139 if (howto->rightshift)
2140 {
2141 (*_bfd_error_handler)
2142 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
2143 bfd_archive_filename (input_bfd),
2144 bfd_get_section_name (input_bfd, input_section),
2145 (long) rel->r_offset, howto->name);
b34976b6 2146 return FALSE;
f8df10f4
JJ
2147 }
2148
2149 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2150
2151 /* Get the (signed) value from the instruction. */
2152 addend = value & howto->src_mask;
2153 if (addend & ((howto->src_mask + 1) >> 1))
2154 {
2155 bfd_signed_vma mask;
2156
2157 mask = -1;
2158 mask &= ~ howto->src_mask;
2159 addend |= mask;
2160 }
2161 msec = sec;
2162 addend =
c629eae0 2163 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
f8df10f4
JJ
2164 - relocation;
2165 addend += msec->output_section->vma + msec->output_offset;
2166 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
2167 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2168 }
2169#else
8517fae7 2170 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
f8df10f4 2171#endif
252b5132
RH
2172 }
2173 else
2174 {
560e09e9
NC
2175 bfd_boolean warned;
2176 bfd_boolean unresolved_reloc;
2177
b2a8e766
AM
2178 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2179 r_symndx, symtab_hdr, sym_hashes,
2180 h, sec, relocation,
2181 unresolved_reloc, warned);
560e09e9
NC
2182
2183 if (unresolved_reloc || relocation != 0)
252b5132 2184 {
252b5132 2185 /* In these cases, we don't need the relocation value.
f21f3fe0 2186 We check specially because in some obscure cases
9b485d32 2187 sec->output_section will be NULL. */
252b5132
RH
2188 switch (r_type)
2189 {
2190 case R_ARM_PC24:
2191 case R_ARM_ABS32:
6a360bf4 2192 case R_ARM_THM_PC22:
252b5132
RH
2193 if (info->shared
2194 && (
5e681ec4 2195 (!info->symbolic && h->dynindx != -1)
97eaf9de 2196 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132 2197 )
5e681ec4 2198 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
05924f36
PB
2199 && ((input_section->flags & SEC_ALLOC) != 0
2200 /* DWARF will emit R_ARM_ABS32 relocations in its
2201 sections against symbols defined externally
2202 in shared libraries. We can't do anything
2203 with them here. */
2204 || ((input_section->flags & SEC_DEBUGGING) != 0
2205 && (h->elf_link_hash_flags
2206 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132 2207 )
560e09e9 2208 relocation = 0;
252b5132 2209 break;
f21f3fe0 2210
252b5132 2211 case R_ARM_GOTPC:
560e09e9 2212 relocation = 0;
252b5132 2213 break;
f21f3fe0 2214
252b5132 2215 case R_ARM_GOT32:
50d6c878 2216 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
560e09e9 2217 (elf_hash_table (info)->dynamic_sections_created,
50d6c878
DJ
2218 info->shared, h))
2219 && (!info->shared
252b5132 2220 || (!info->symbolic && h->dynindx != -1)
50d6c878
DJ
2221 || (h->elf_link_hash_flags
2222 & ELF_LINK_HASH_DEF_REGULAR) == 0))
560e09e9 2223 relocation = 0;
252b5132 2224 break;
f21f3fe0 2225
252b5132
RH
2226 case R_ARM_PLT32:
2227 if (h->plt.offset != (bfd_vma)-1)
560e09e9 2228 relocation = 0;
252b5132 2229 break;
f21f3fe0 2230
252b5132 2231 default:
560e09e9
NC
2232 if (unresolved_reloc)
2233 _bfd_error_handler
2234 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
2235 bfd_archive_filename (input_bfd),
2236 r_type,
2237 h->root.root.string,
2238 bfd_get_section_name (input_bfd, input_section));
2239 break;
252b5132 2240 }
252b5132
RH
2241 }
2242 }
2243
2244 if (h != NULL)
2245 name = h->root.root.string;
2246 else
2247 {
2248 name = (bfd_elf_string_from_elf_section
2249 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2250 if (name == NULL || *name == '\0')
2251 name = bfd_section_name (input_bfd, sec);
2252 }
f21f3fe0 2253
252b5132
RH
2254 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2255 input_section, contents, rel,
2256 relocation, info, sec, name,
2257 (h ? ELF_ST_TYPE (h->type) :
780a67af 2258 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH
2259
2260 if (r != bfd_reloc_ok)
2261 {
2262 const char * msg = (const char *) 0;
2263
2264 switch (r)
2265 {
2266 case bfd_reloc_overflow:
cf919dfd
PB
2267 /* If the overflowing reloc was to an undefined symbol,
2268 we have already printed one error message and there
2269 is no point complaining again. */
2270 if ((! h ||
2271 h->root.type != bfd_link_hash_undefined)
2272 && (!((*info->callbacks->reloc_overflow)
2273 (info, name, howto->name, (bfd_vma) 0,
2274 input_bfd, input_section, rel->r_offset))))
b34976b6 2275 return FALSE;
252b5132
RH
2276 break;
2277
2278 case bfd_reloc_undefined:
2279 if (!((*info->callbacks->undefined_symbol)
2280 (info, name, input_bfd, input_section,
b34976b6
AM
2281 rel->r_offset, TRUE)))
2282 return FALSE;
252b5132
RH
2283 break;
2284
2285 case bfd_reloc_outofrange:
9b485d32 2286 msg = _("internal error: out of range error");
252b5132
RH
2287 goto common_error;
2288
2289 case bfd_reloc_notsupported:
9b485d32 2290 msg = _("internal error: unsupported relocation error");
252b5132
RH
2291 goto common_error;
2292
2293 case bfd_reloc_dangerous:
9b485d32 2294 msg = _("internal error: dangerous error");
252b5132
RH
2295 goto common_error;
2296
2297 default:
9b485d32 2298 msg = _("internal error: unknown error");
252b5132
RH
2299 /* fall through */
2300
2301 common_error:
2302 if (!((*info->callbacks->warning)
2303 (info, msg, name, input_bfd, input_section,
2304 rel->r_offset)))
b34976b6 2305 return FALSE;
252b5132
RH
2306 break;
2307 }
2308 }
2309 }
2310
b34976b6 2311 return TRUE;
252b5132
RH
2312}
2313
c178919b
NC
2314/* Set the right machine number. */
2315
2316static bfd_boolean
2317elf32_arm_object_p (abfd)
2318 bfd *abfd;
2319{
5a6c6817
NC
2320 unsigned int mach;
2321
2322 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
c178919b 2323
5a6c6817
NC
2324 if (mach != bfd_mach_arm_unknown)
2325 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
2326
2327 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
2328 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
e16bb312 2329
e16bb312 2330 else
5a6c6817 2331 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
c178919b
NC
2332
2333 return TRUE;
2334}
2335
fc830a83 2336/* Function to keep ARM specific flags in the ELF header. */
b34976b6 2337static bfd_boolean
252b5132
RH
2338elf32_arm_set_private_flags (abfd, flags)
2339 bfd *abfd;
2340 flagword flags;
2341{
2342 if (elf_flags_init (abfd)
2343 && elf_elfheader (abfd)->e_flags != flags)
2344 {
fc830a83
NC
2345 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2346 {
fd2ec330 2347 if (flags & EF_ARM_INTERWORK)
8f615d07 2348 (*_bfd_error_handler) (_("\
ae1a89b7 2349Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
8f615d07 2350 bfd_archive_filename (abfd));
fc830a83 2351 else
63b0f745 2352 _bfd_error_handler (_("\
ae1a89b7 2353Warning: Clearing the interworking flag of %s due to outside request"),
63b0f745 2354 bfd_archive_filename (abfd));
fc830a83 2355 }
252b5132
RH
2356 }
2357 else
2358 {
2359 elf_elfheader (abfd)->e_flags = flags;
b34976b6 2360 elf_flags_init (abfd) = TRUE;
252b5132
RH
2361 }
2362
b34976b6 2363 return TRUE;
252b5132
RH
2364}
2365
fc830a83 2366/* Copy backend specific data from one object module to another. */
9b485d32 2367
b34976b6 2368static bfd_boolean
252b5132
RH
2369elf32_arm_copy_private_bfd_data (ibfd, obfd)
2370 bfd *ibfd;
2371 bfd *obfd;
2372{
2373 flagword in_flags;
2374 flagword out_flags;
2375
fc830a83 2376 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132 2377 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 2378 return TRUE;
252b5132 2379
fc830a83 2380 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH
2381 out_flags = elf_elfheader (obfd)->e_flags;
2382
fc830a83
NC
2383 if (elf_flags_init (obfd)
2384 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2385 && in_flags != out_flags)
252b5132 2386 {
252b5132 2387 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 2388 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
b34976b6 2389 return FALSE;
252b5132
RH
2390
2391 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 2392 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
b34976b6 2393 return FALSE;
252b5132
RH
2394
2395 /* If the src and dest have different interworking flags
2396 then turn off the interworking bit. */
fd2ec330 2397 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 2398 {
fd2ec330 2399 if (out_flags & EF_ARM_INTERWORK)
63b0f745 2400 _bfd_error_handler (_("\
ae1a89b7 2401Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
06317a27 2402 bfd_get_filename (obfd),
63b0f745 2403 bfd_archive_filename (ibfd));
252b5132 2404
fd2ec330 2405 in_flags &= ~EF_ARM_INTERWORK;
252b5132 2406 }
1006ba19
PB
2407
2408 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB
2409 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2410 in_flags &= ~EF_ARM_PIC;
252b5132
RH
2411 }
2412
2413 elf_elfheader (obfd)->e_flags = in_flags;
b34976b6 2414 elf_flags_init (obfd) = TRUE;
252b5132 2415
b34976b6 2416 return TRUE;
252b5132
RH
2417}
2418
2419/* Merge backend specific data from an object file to the output
2420 object file when linking. */
9b485d32 2421
b34976b6 2422static bfd_boolean
252b5132 2423elf32_arm_merge_private_bfd_data (ibfd, obfd)
fc830a83
NC
2424 bfd * ibfd;
2425 bfd * obfd;
252b5132
RH
2426{
2427 flagword out_flags;
2428 flagword in_flags;
b34976b6 2429 bfd_boolean flags_compatible = TRUE;
cf919dfd 2430 asection *sec;
252b5132 2431
9b485d32 2432 /* Check if we have the same endianess. */
82e51918 2433 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
b34976b6 2434 return FALSE;
1fe494a5 2435
252b5132
RH
2436 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2437 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 2438 return TRUE;
252b5132 2439
252b5132
RH
2440 /* The input BFD must have had its flags initialised. */
2441 /* The following seems bogus to me -- The flags are initialized in
2442 the assembler but I don't think an elf_flags_init field is
9b485d32 2443 written into the object. */
252b5132
RH
2444 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2445
2446 in_flags = elf_elfheader (ibfd)->e_flags;
2447 out_flags = elf_elfheader (obfd)->e_flags;
2448
2449 if (!elf_flags_init (obfd))
2450 {
fe077fa6
NC
2451 /* If the input is the default architecture and had the default
2452 flags then do not bother setting the flags for the output
2453 architecture, instead allow future merges to do this. If no
2454 future merges ever set these flags then they will retain their
2455 uninitialised values, which surprise surprise, correspond
252b5132 2456 to the default values. */
fe077fa6
NC
2457 if (bfd_get_arch_info (ibfd)->the_default
2458 && elf_elfheader (ibfd)->e_flags == 0)
b34976b6 2459 return TRUE;
252b5132 2460
b34976b6 2461 elf_flags_init (obfd) = TRUE;
252b5132
RH
2462 elf_elfheader (obfd)->e_flags = in_flags;
2463
2464 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2465 && bfd_get_arch_info (obfd)->the_default)
2466 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2467
b34976b6 2468 return TRUE;
252b5132
RH
2469 }
2470
5a6c6817
NC
2471 /* Determine what should happen if the input ARM architecture
2472 does not match the output ARM architecture. */
2473 if (! bfd_arm_merge_machines (ibfd, obfd))
2474 return FALSE;
e16bb312 2475
1006ba19 2476 /* Identical flags must be compatible. */
252b5132 2477 if (in_flags == out_flags)
b34976b6 2478 return TRUE;
252b5132 2479
35a0f415
DJ
2480 /* Check to see if the input BFD actually contains any sections. If
2481 not, its flags may not have been initialised either, but it
2482 cannot actually cause any incompatibility. Do not short-circuit
2483 dynamic objects; their section list may be emptied by
d1f161ea 2484 elf_link_add_object_symbols.
35a0f415 2485
d1f161ea
NC
2486 Also check to see if there are no code sections in the input.
2487 In this case there is no need to check for code specific flags.
2488 XXX - do we need to worry about floating-point format compatability
2489 in data sections ? */
35a0f415 2490 if (!(ibfd->flags & DYNAMIC))
cf919dfd 2491 {
35a0f415 2492 bfd_boolean null_input_bfd = TRUE;
d1f161ea 2493 bfd_boolean only_data_sections = TRUE;
35a0f415
DJ
2494
2495 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
cf919dfd 2496 {
35a0f415
DJ
2497 /* Ignore synthetic glue sections. */
2498 if (strcmp (sec->name, ".glue_7")
2499 && strcmp (sec->name, ".glue_7t"))
2500 {
d1f161ea
NC
2501 if ((bfd_get_section_flags (ibfd, sec)
2502 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
2503 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
2504 only_data_sections = FALSE;
2505
35a0f415
DJ
2506 null_input_bfd = FALSE;
2507 break;
2508 }
cf919dfd 2509 }
d1f161ea
NC
2510
2511 if (null_input_bfd || only_data_sections)
35a0f415 2512 return TRUE;
cf919dfd 2513 }
cf919dfd 2514
252b5132 2515 /* Complain about various flag mismatches. */
fc830a83
NC
2516 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2517 {
63b0f745 2518 _bfd_error_handler (_("\
6c571f00 2519ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"),
63b0f745
NC
2520 bfd_archive_filename (ibfd),
2521 (in_flags & EF_ARM_EABIMASK) >> 24,
06317a27 2522 bfd_get_filename (obfd),
63b0f745 2523 (out_flags & EF_ARM_EABIMASK) >> 24);
b34976b6 2524 return FALSE;
fc830a83 2525 }
252b5132 2526
1006ba19
PB
2527 /* Not sure what needs to be checked for EABI versions >= 1. */
2528 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2529 {
fd2ec330 2530 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19 2531 {
63b0f745 2532 _bfd_error_handler (_("\
6c571f00 2533ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"),
63b0f745
NC
2534 bfd_archive_filename (ibfd),
2535 in_flags & EF_ARM_APCS_26 ? 26 : 32,
06317a27 2536 bfd_get_filename (obfd),
63b0f745 2537 out_flags & EF_ARM_APCS_26 ? 26 : 32);
b34976b6 2538 flags_compatible = FALSE;
1006ba19 2539 }
252b5132 2540
fd2ec330 2541 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19 2542 {
5eefb65f
NC
2543 if (in_flags & EF_ARM_APCS_FLOAT)
2544 _bfd_error_handler (_("\
6c571f00 2545ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"),
5eefb65f
NC
2546 bfd_archive_filename (ibfd),
2547 bfd_get_filename (obfd));
2548 else
2549 _bfd_error_handler (_("\
6c571f00 2550ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"),
5eefb65f
NC
2551 bfd_archive_filename (ibfd),
2552 bfd_get_filename (obfd));
63b0f745 2553
b34976b6 2554 flags_compatible = FALSE;
1006ba19 2555 }
252b5132 2556
96a846ea 2557 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
1006ba19 2558 {
96a846ea
RE
2559 if (in_flags & EF_ARM_VFP_FLOAT)
2560 _bfd_error_handler (_("\
fde78edd 2561ERROR: %s uses VFP instructions, whereas %s does not"),
5eefb65f
NC
2562 bfd_archive_filename (ibfd),
2563 bfd_get_filename (obfd));
2564 else
96a846ea 2565 _bfd_error_handler (_("\
fde78edd
NC
2566ERROR: %s uses FPA instructions, whereas %s does not"),
2567 bfd_archive_filename (ibfd),
2568 bfd_get_filename (obfd));
2569
2570 flags_compatible = FALSE;
2571 }
2572
2573 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
2574 {
2575 if (in_flags & EF_ARM_MAVERICK_FLOAT)
2576 _bfd_error_handler (_("\
2577ERROR: %s uses Maverick instructions, whereas %s does not"),
2578 bfd_archive_filename (ibfd),
2579 bfd_get_filename (obfd));
2580 else
2581 _bfd_error_handler (_("\
5a21e886 2582ERROR: %s does not use Maverick instructions, whereas %s does"),
5eefb65f
NC
2583 bfd_archive_filename (ibfd),
2584 bfd_get_filename (obfd));
63b0f745 2585
b34976b6 2586 flags_compatible = FALSE;
1006ba19 2587 }
96a846ea
RE
2588
2589#ifdef EF_ARM_SOFT_FLOAT
2590 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
2591 {
2592 /* We can allow interworking between code that is VFP format
2593 layout, and uses either soft float or integer regs for
2594 passing floating point arguments and results. We already
2595 know that the APCS_FLOAT flags match; similarly for VFP
2596 flags. */
2597 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
2598 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
2599 {
2600 if (in_flags & EF_ARM_SOFT_FLOAT)
517662d4 2601 _bfd_error_handler (_("\
6c571f00 2602ERROR: %s uses software FP, whereas %s uses hardware FP"),
96a846ea
RE
2603 bfd_archive_filename (ibfd),
2604 bfd_get_filename (obfd));
2605 else
517662d4 2606 _bfd_error_handler (_("\
6c571f00 2607ERROR: %s uses hardware FP, whereas %s uses software FP"),
96a846ea
RE
2608 bfd_archive_filename (ibfd),
2609 bfd_get_filename (obfd));
2610
b34976b6 2611 flags_compatible = FALSE;
96a846ea
RE
2612 }
2613 }
ee43f35e 2614#endif
252b5132 2615
1006ba19 2616 /* Interworking mismatch is only a warning. */
fd2ec330 2617 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8f615d07 2618 {
e3c8793a
NC
2619 if (in_flags & EF_ARM_INTERWORK)
2620 {
2621 _bfd_error_handler (_("\
2622Warning: %s supports interworking, whereas %s does not"),
2623 bfd_archive_filename (ibfd),
cedb70c5 2624 bfd_get_filename (obfd));
e3c8793a
NC
2625 }
2626 else
2627 {
2628 _bfd_error_handler (_("\
2629Warning: %s does not support interworking, whereas %s does"),
2630 bfd_archive_filename (ibfd),
2631 bfd_get_filename (obfd));
2632 }
8f615d07 2633 }
252b5132 2634 }
63b0f745 2635
1006ba19 2636 return flags_compatible;
252b5132
RH
2637}
2638
9b485d32
NC
2639/* Display the flags field. */
2640
b34976b6 2641static bfd_boolean
252b5132
RH
2642elf32_arm_print_private_bfd_data (abfd, ptr)
2643 bfd *abfd;
2644 PTR ptr;
2645{
fc830a83
NC
2646 FILE * file = (FILE *) ptr;
2647 unsigned long flags;
252b5132
RH
2648
2649 BFD_ASSERT (abfd != NULL && ptr != NULL);
2650
2651 /* Print normal ELF private data. */
2652 _bfd_elf_print_private_bfd_data (abfd, ptr);
2653
fc830a83 2654 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC
2655 /* Ignore init flag - it may not be set, despite the flags field
2656 containing valid data. */
252b5132
RH
2657
2658 /* xgettext:c-format */
9b485d32 2659 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 2660
fc830a83
NC
2661 switch (EF_ARM_EABI_VERSION (flags))
2662 {
2663 case EF_ARM_EABI_UNKNOWN:
4cc11e76 2664 /* The following flag bits are GNU extensions and not part of the
fc830a83
NC
2665 official ARM ELF extended ABI. Hence they are only decoded if
2666 the EABI version is not set. */
fd2ec330 2667 if (flags & EF_ARM_INTERWORK)
9b485d32 2668 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 2669
fd2ec330 2670 if (flags & EF_ARM_APCS_26)
6c571f00 2671 fprintf (file, " [APCS-26]");
fc830a83 2672 else
6c571f00 2673 fprintf (file, " [APCS-32]");
9a5aca8c 2674
96a846ea
RE
2675 if (flags & EF_ARM_VFP_FLOAT)
2676 fprintf (file, _(" [VFP float format]"));
fde78edd
NC
2677 else if (flags & EF_ARM_MAVERICK_FLOAT)
2678 fprintf (file, _(" [Maverick float format]"));
96a846ea
RE
2679 else
2680 fprintf (file, _(" [FPA float format]"));
2681
fd2ec330 2682 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 2683 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 2684
fd2ec330 2685 if (flags & EF_ARM_PIC)
9b485d32 2686 fprintf (file, _(" [position independent]"));
fc830a83 2687
fd2ec330 2688 if (flags & EF_ARM_NEW_ABI)
9b485d32 2689 fprintf (file, _(" [new ABI]"));
9a5aca8c 2690
fd2ec330 2691 if (flags & EF_ARM_OLD_ABI)
9b485d32 2692 fprintf (file, _(" [old ABI]"));
9a5aca8c 2693
fd2ec330 2694 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 2695 fprintf (file, _(" [software FP]"));
9a5aca8c 2696
96a846ea
RE
2697 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
2698 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
fde78edd
NC
2699 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
2700 | EF_ARM_MAVERICK_FLOAT);
fc830a83 2701 break;
9a5aca8c 2702
fc830a83 2703 case EF_ARM_EABI_VER1:
9b485d32 2704 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 2705
fc830a83 2706 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 2707 fprintf (file, _(" [sorted symbol table]"));
fc830a83 2708 else
9b485d32 2709 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 2710
fc830a83
NC
2711 flags &= ~ EF_ARM_SYMSARESORTED;
2712 break;
9a5aca8c 2713
fd2ec330
PB
2714 case EF_ARM_EABI_VER2:
2715 fprintf (file, _(" [Version2 EABI]"));
2716
2717 if (flags & EF_ARM_SYMSARESORTED)
2718 fprintf (file, _(" [sorted symbol table]"));
2719 else
2720 fprintf (file, _(" [unsorted symbol table]"));
2721
2722 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2723 fprintf (file, _(" [dynamic symbols use segment index]"));
2724
2725 if (flags & EF_ARM_MAPSYMSFIRST)
2726 fprintf (file, _(" [mapping symbols precede others]"));
2727
99e4ae17 2728 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB
2729 | EF_ARM_MAPSYMSFIRST);
2730 break;
2731
d507cf36
PB
2732 case EF_ARM_EABI_VER3:
2733 fprintf (file, _(" [Version3 EABI]"));
2734
2735 if (flags & EF_ARM_BE8)
2736 fprintf (file, _(" [BE8]"));
2737
2738 if (flags & EF_ARM_LE8)
2739 fprintf (file, _(" [LE8]"));
2740
2741 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
2742 break;
2743
fc830a83 2744 default:
9b485d32 2745 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC
2746 break;
2747 }
252b5132 2748
fc830a83 2749 flags &= ~ EF_ARM_EABIMASK;
252b5132 2750
fc830a83 2751 if (flags & EF_ARM_RELEXEC)
9b485d32 2752 fprintf (file, _(" [relocatable executable]"));
252b5132 2753
fc830a83 2754 if (flags & EF_ARM_HASENTRY)
9b485d32 2755 fprintf (file, _(" [has entry point]"));
252b5132 2756
fc830a83
NC
2757 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2758
2759 if (flags)
9b485d32 2760 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 2761
252b5132
RH
2762 fputc ('\n', file);
2763
b34976b6 2764 return TRUE;
252b5132
RH
2765}
2766
2767static int
2768elf32_arm_get_symbol_type (elf_sym, type)
2769 Elf_Internal_Sym * elf_sym;
2770 int type;
2771{
2f0ca46a
NC
2772 switch (ELF_ST_TYPE (elf_sym->st_info))
2773 {
2774 case STT_ARM_TFUNC:
2775 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 2776
2f0ca46a
NC
2777 case STT_ARM_16BIT:
2778 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2779 This allows us to distinguish between data used by Thumb instructions
2780 and non-data (which is probably code) inside Thumb regions of an
2781 executable. */
2782 if (type != STT_OBJECT)
2783 return ELF_ST_TYPE (elf_sym->st_info);
2784 break;
9a5aca8c 2785
ce855c42
NC
2786 default:
2787 break;
2f0ca46a
NC
2788 }
2789
2790 return type;
252b5132 2791}
f21f3fe0 2792
252b5132 2793static asection *
1e2f5b6e
AM
2794elf32_arm_gc_mark_hook (sec, info, rel, h, sym)
2795 asection *sec;
5f771d47 2796 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH
2797 Elf_Internal_Rela *rel;
2798 struct elf_link_hash_entry *h;
2799 Elf_Internal_Sym *sym;
2800{
2801 if (h != NULL)
2802 {
2803 switch (ELF32_R_TYPE (rel->r_info))
2804 {
2805 case R_ARM_GNU_VTINHERIT:
2806 case R_ARM_GNU_VTENTRY:
2807 break;
2808
2809 default:
2810 switch (h->root.type)
2811 {
2812 case bfd_link_hash_defined:
2813 case bfd_link_hash_defweak:
2814 return h->root.u.def.section;
2815
2816 case bfd_link_hash_common:
2817 return h->root.u.c.p->section;
e049a0de
ILT
2818
2819 default:
2820 break;
252b5132
RH
2821 }
2822 }
2823 }
2824 else
1e2f5b6e 2825 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
9ad5cbcf 2826
252b5132
RH
2827 return NULL;
2828}
2829
780a67af
NC
2830/* Update the got entry reference counts for the section being removed. */
2831
b34976b6 2832static bfd_boolean
252b5132 2833elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT
2834 bfd *abfd ATTRIBUTE_UNUSED;
2835 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2836 asection *sec ATTRIBUTE_UNUSED;
2837 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2838{
5e681ec4
PB
2839 Elf_Internal_Shdr *symtab_hdr;
2840 struct elf_link_hash_entry **sym_hashes;
2841 bfd_signed_vma *local_got_refcounts;
2842 const Elf_Internal_Rela *rel, *relend;
2843 unsigned long r_symndx;
2844 struct elf_link_hash_entry *h;
2845
2846 elf_section_data (sec)->local_dynrel = NULL;
2847
2848 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2849 sym_hashes = elf_sym_hashes (abfd);
2850 local_got_refcounts = elf_local_got_refcounts (abfd);
2851
2852 relend = relocs + sec->reloc_count;
2853 for (rel = relocs; rel < relend; rel++)
2854 switch (ELF32_R_TYPE (rel->r_info))
2855 {
2856 case R_ARM_GOT32:
2857 r_symndx = ELF32_R_SYM (rel->r_info);
2858 if (r_symndx >= symtab_hdr->sh_info)
2859 {
2860 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2861 if (h->got.refcount > 0)
2862 h->got.refcount -= 1;
2863 }
2864 else if (local_got_refcounts != NULL)
2865 {
2866 if (local_got_refcounts[r_symndx] > 0)
2867 local_got_refcounts[r_symndx] -= 1;
2868 }
2869 break;
2870
2871 case R_ARM_ABS32:
2872 case R_ARM_REL32:
2873 case R_ARM_PC24:
7359ea65 2874 case R_ARM_PLT32:
5e681ec4
PB
2875 r_symndx = ELF32_R_SYM (rel->r_info);
2876 if (r_symndx >= symtab_hdr->sh_info)
2877 {
2878 struct elf32_arm_link_hash_entry *eh;
2879 struct elf32_arm_relocs_copied **pp;
2880 struct elf32_arm_relocs_copied *p;
2881
2882 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2883
7359ea65 2884 if (h->plt.refcount > 0)
5e681ec4
PB
2885 h->plt.refcount -= 1;
2886
7359ea65
DJ
2887 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
2888 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
2889 {
2890 eh = (struct elf32_arm_link_hash_entry *) h;
5e681ec4 2891
7359ea65
DJ
2892 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
2893 pp = &p->next)
2894 if (p->section == sec)
2895 {
2896 p->count -= 1;
2897 if (p->count == 0)
2898 *pp = p->next;
2899 break;
2900 }
2901 }
5e681ec4
PB
2902 }
2903 break;
2904
2905 default:
2906 break;
2907 }
2908
b34976b6 2909 return TRUE;
252b5132
RH
2910}
2911
780a67af
NC
2912/* Look through the relocs for a section during the first phase. */
2913
b34976b6 2914static bfd_boolean
252b5132 2915elf32_arm_check_relocs (abfd, info, sec, relocs)
b34976b6
AM
2916 bfd *abfd;
2917 struct bfd_link_info *info;
2918 asection *sec;
2919 const Elf_Internal_Rela *relocs;
252b5132 2920{
b34976b6
AM
2921 Elf_Internal_Shdr *symtab_hdr;
2922 struct elf_link_hash_entry **sym_hashes;
2923 struct elf_link_hash_entry **sym_hashes_end;
2924 const Elf_Internal_Rela *rel;
2925 const Elf_Internal_Rela *rel_end;
2926 bfd *dynobj;
5e681ec4 2927 asection *sreloc;
b34976b6 2928 bfd_vma *local_got_offsets;
5e681ec4 2929 struct elf32_arm_link_hash_table *htab;
9a5aca8c 2930
1049f94e 2931 if (info->relocatable)
b34976b6 2932 return TRUE;
9a5aca8c 2933
5e681ec4
PB
2934 htab = elf32_arm_hash_table (info);
2935 sreloc = NULL;
9a5aca8c 2936
252b5132
RH
2937 dynobj = elf_hash_table (info)->dynobj;
2938 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2939
252b5132
RH
2940 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2941 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC
2942 sym_hashes_end = sym_hashes
2943 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2944
252b5132
RH
2945 if (!elf_bad_symtab (abfd))
2946 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 2947
252b5132
RH
2948 rel_end = relocs + sec->reloc_count;
2949 for (rel = relocs; rel < rel_end; rel++)
2950 {
2951 struct elf_link_hash_entry *h;
2952 unsigned long r_symndx;
9a5aca8c 2953
252b5132
RH
2954 r_symndx = ELF32_R_SYM (rel->r_info);
2955 if (r_symndx < symtab_hdr->sh_info)
2956 h = NULL;
2957 else
2958 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 2959
252b5132
RH
2960 switch (ELF32_R_TYPE (rel->r_info))
2961 {
5e681ec4
PB
2962 case R_ARM_GOT32:
2963 /* This symbol requires a global offset table entry. */
252b5132
RH
2964 if (h != NULL)
2965 {
5e681ec4 2966 h->got.refcount++;
252b5132
RH
2967 }
2968 else
2969 {
5e681ec4
PB
2970 bfd_signed_vma *local_got_refcounts;
2971
2972 /* This is a global offset table entry for a local symbol. */
2973 local_got_refcounts = elf_local_got_refcounts (abfd);
2974 if (local_got_refcounts == NULL)
252b5132 2975 {
dc810e39 2976 bfd_size_type size;
252b5132 2977
dc810e39 2978 size = symtab_hdr->sh_info;
5e681ec4
PB
2979 size *= (sizeof (bfd_signed_vma) + sizeof(char));
2980 local_got_refcounts = ((bfd_signed_vma *)
2981 bfd_zalloc (abfd, size));
2982 if (local_got_refcounts == NULL)
b34976b6 2983 return FALSE;
5e681ec4 2984 elf_local_got_refcounts (abfd) = local_got_refcounts;
252b5132 2985 }
5e681ec4 2986 local_got_refcounts[r_symndx] += 1;
252b5132 2987 }
252b5132
RH
2988 break;
2989
5e681ec4
PB
2990 case R_ARM_GOTOFF:
2991 case R_ARM_GOTPC:
2992 if (htab->sgot == NULL)
2993 {
2994 if (htab->root.dynobj == NULL)
2995 htab->root.dynobj = abfd;
2996 if (!create_got_section (htab->root.dynobj, info))
2997 return FALSE;
2998 }
252b5132
RH
2999 break;
3000
3001 case R_ARM_ABS32:
3002 case R_ARM_REL32:
3003 case R_ARM_PC24:
7359ea65
DJ
3004 case R_ARM_PLT32:
3005 if (h != NULL)
5e681ec4
PB
3006 {
3007 /* If this reloc is in a read-only section, we might
3008 need a copy reloc. We can't check reliably at this
3009 stage whether the section is read-only, as input
3010 sections have not yet been mapped to output sections.
3011 Tentatively set the flag for now, and correct in
3012 adjust_dynamic_symbol. */
7359ea65
DJ
3013 if (!info->shared)
3014 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3015
5e681ec4 3016 /* We may need a .plt entry if the function this reloc
c84cd8ee
DJ
3017 refers to is in a different object. We can't tell for
3018 sure yet, because something later might force the
3019 symbol local. */
7359ea65
DJ
3020 if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24
3021 || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32)
4f199be3
DJ
3022 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3023
3024 /* If we create a PLT entry, this relocation will reference
3025 it, even if it's an ABS32 relocation. */
3026 h->plt.refcount += 1;
5e681ec4
PB
3027 }
3028
252b5132
RH
3029 /* If we are creating a shared library, and this is a reloc
3030 against a global symbol, or a non PC relative reloc
3031 against a local symbol, then we need to copy the reloc
3032 into the shared library. However, if we are linking with
3033 -Bsymbolic, we do not need to copy a reloc against a
3034 global symbol which is defined in an object we are
3035 including in the link (i.e., DEF_REGULAR is set). At
3036 this point we have not seen all the input files, so it is
3037 possible that DEF_REGULAR is not set now but will be set
3038 later (it is never cleared). We account for that
3039 possibility below by storing information in the
5e681ec4 3040 relocs_copied field of the hash table entry. */
252b5132 3041 if (info->shared
5e681ec4 3042 && (sec->flags & SEC_ALLOC) != 0
7359ea65
DJ
3043 && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
3044 && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32)
5e681ec4
PB
3045 || (h != NULL
3046 && (! info->symbolic
3047 || (h->elf_link_hash_flags
3048 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
252b5132 3049 {
5e681ec4
PB
3050 struct elf32_arm_relocs_copied *p, **head;
3051
252b5132
RH
3052 /* When creating a shared object, we must copy these
3053 reloc types into the output file. We create a reloc
3054 section in dynobj and make room for this reloc. */
3055 if (sreloc == NULL)
3056 {
3057 const char * name;
3058
3059 name = (bfd_elf_string_from_elf_section
3060 (abfd,
3061 elf_elfheader (abfd)->e_shstrndx,
3062 elf_section_data (sec)->rel_hdr.sh_name));
3063 if (name == NULL)
b34976b6 3064 return FALSE;
252b5132
RH
3065
3066 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 3067 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH
3068 name + 4) == 0);
3069
3070 sreloc = bfd_get_section_by_name (dynobj, name);
3071 if (sreloc == NULL)
3072 {
3073 flagword flags;
3074
3075 sreloc = bfd_make_section (dynobj, name);
3076 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3077 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3078 if ((sec->flags & SEC_ALLOC) != 0)
3079 flags |= SEC_ALLOC | SEC_LOAD;
3080 if (sreloc == NULL
3081 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3082 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 3083 return FALSE;
252b5132 3084 }
5e681ec4
PB
3085
3086 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH
3087 }
3088
5e681ec4
PB
3089 /* If this is a global symbol, we count the number of
3090 relocations we need for this symbol. */
3091 if (h != NULL)
252b5132 3092 {
5e681ec4
PB
3093 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
3094 }
3095 else
3096 {
3097 /* Track dynamic relocs needed for local syms too.
3098 We really need local syms available to do this
3099 easily. Oh well. */
3100
3101 asection *s;
3102 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3103 sec, r_symndx);
3104 if (s == NULL)
3105 return FALSE;
3106
3107 head = ((struct elf32_arm_relocs_copied **)
3108 &elf_section_data (s)->local_dynrel);
3109 }
3110
3111 p = *head;
3112 if (p == NULL || p->section != sec)
3113 {
3114 bfd_size_type amt = sizeof *p;
3115 p = bfd_alloc (htab->root.dynobj, amt);
252b5132 3116 if (p == NULL)
5e681ec4
PB
3117 return FALSE;
3118 p->next = *head;
3119 *head = p;
3120 p->section = sec;
3121 p->count = 0;
252b5132 3122 }
5e681ec4 3123
7359ea65
DJ
3124 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
3125 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
3126 p->count += 1;
252b5132
RH
3127 }
3128 break;
3129
3130 /* This relocation describes the C++ object vtable hierarchy.
3131 Reconstruct it for later use during GC. */
3132 case R_ARM_GNU_VTINHERIT:
c152c796 3133 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 3134 return FALSE;
252b5132 3135 break;
9a5aca8c 3136
252b5132
RH
3137 /* This relocation describes which C++ vtable entries are actually
3138 used. Record for later use during GC. */
3139 case R_ARM_GNU_VTENTRY:
c152c796 3140 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 3141 return FALSE;
252b5132
RH
3142 break;
3143 }
3144 }
f21f3fe0 3145
b34976b6 3146 return TRUE;
252b5132
RH
3147}
3148
252b5132
RH
3149/* Find the nearest line to a particular section and offset, for error
3150 reporting. This code is a duplicate of the code in elf.c, except
9b485d32 3151 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
252b5132 3152
b34976b6 3153static bfd_boolean
252b5132
RH
3154elf32_arm_find_nearest_line
3155 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
b34976b6
AM
3156 bfd *abfd;
3157 asection *section;
3158 asymbol **symbols;
3159 bfd_vma offset;
3160 const char **filename_ptr;
3161 const char **functionname_ptr;
3162 unsigned int *line_ptr;
252b5132 3163{
b34976b6
AM
3164 bfd_boolean found;
3165 const char *filename;
3166 asymbol *func;
3167 bfd_vma low_func;
3168 asymbol **p;
252b5132
RH
3169
3170 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 3171 filename_ptr, functionname_ptr,
857ec808
NC
3172 line_ptr, 0,
3173 &elf_tdata (abfd)->dwarf2_find_line_info))
b34976b6 3174 return TRUE;
252b5132
RH
3175
3176 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
3177 &found, filename_ptr,
3178 functionname_ptr, line_ptr,
3179 &elf_tdata (abfd)->line_info))
b34976b6 3180 return FALSE;
f21f3fe0 3181
252b5132 3182 if (found)
b34976b6 3183 return TRUE;
252b5132
RH
3184
3185 if (symbols == NULL)
b34976b6 3186 return FALSE;
252b5132
RH
3187
3188 filename = NULL;
3189 func = NULL;
3190 low_func = 0;
3191
3192 for (p = symbols; *p != NULL; p++)
3193 {
3194 elf_symbol_type *q;
3195
3196 q = (elf_symbol_type *) *p;
3197
3198 if (bfd_get_section (&q->symbol) != section)
3199 continue;
3200
3201 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
3202 {
3203 default:
3204 break;
3205 case STT_FILE:
3206 filename = bfd_asymbol_name (&q->symbol);
3207 break;
3208 case STT_NOTYPE:
3209 case STT_FUNC:
3210 case STT_ARM_TFUNC:
3211 if (q->symbol.section == section
3212 && q->symbol.value >= low_func
3213 && q->symbol.value <= offset)
3214 {
3215 func = (asymbol *) q;
3216 low_func = q->symbol.value;
3217 }
3218 break;
3219 }
3220 }
3221
3222 if (func == NULL)
b34976b6 3223 return FALSE;
252b5132
RH
3224
3225 *filename_ptr = filename;
3226 *functionname_ptr = bfd_asymbol_name (func);
3227 *line_ptr = 0;
f21f3fe0 3228
b34976b6 3229 return TRUE;
252b5132
RH
3230}
3231
3232/* Adjust a symbol defined by a dynamic object and referenced by a
3233 regular object. The current definition is in some section of the
3234 dynamic object, but we're not including those sections. We have to
3235 change the definition to something the rest of the link can
3236 understand. */
3237
b34976b6 3238static bfd_boolean
252b5132
RH
3239elf32_arm_adjust_dynamic_symbol (info, h)
3240 struct bfd_link_info * info;
3241 struct elf_link_hash_entry * h;
3242{
3243 bfd * dynobj;
3244 asection * s;
3245 unsigned int power_of_two;
3246
3247 dynobj = elf_hash_table (info)->dynobj;
3248
3249 /* Make sure we know what is going on here. */
3250 BFD_ASSERT (dynobj != NULL
3251 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
3252 || h->weakdef != NULL
3253 || ((h->elf_link_hash_flags
3254 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3255 && (h->elf_link_hash_flags
3256 & ELF_LINK_HASH_REF_REGULAR) != 0
3257 && (h->elf_link_hash_flags
3258 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
3259
3260 /* If this is a function, put it in the procedure linkage table. We
3261 will fill in the contents of the procedure linkage table later,
3262 when we know the address of the .got section. */
24a1ba0f 3263 if (h->type == STT_FUNC
252b5132
RH
3264 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3265 {
5e681ec4
PB
3266 if (h->plt.refcount <= 0
3267 || SYMBOL_CALLS_LOCAL (info, h)
3268 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3269 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH
3270 {
3271 /* This case can occur if we saw a PLT32 reloc in an input
5e681ec4
PB
3272 file, but the symbol was never referred to by a dynamic
3273 object, or if all references were garbage collected. In
3274 such a case, we don't actually need to build a procedure
3275 linkage table, and we can just do a PC24 reloc instead. */
3276 h->plt.offset = (bfd_vma) -1;
9d7404b7 3277 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
252b5132
RH
3278 }
3279
b34976b6 3280 return TRUE;
252b5132 3281 }
5e681ec4
PB
3282 else
3283 /* It's possible that we incorrectly decided a .plt reloc was
3284 needed for an R_ARM_PC24 reloc to a non-function sym in
3285 check_relocs. We can't decide accurately between function and
3286 non-function syms in check-relocs; Objects loaded later in
3287 the link may change h->type. So fix it now. */
3288 h->plt.offset = (bfd_vma) -1;
252b5132
RH
3289
3290 /* If this is a weak symbol, and there is a real definition, the
3291 processor independent code will have arranged for us to see the
3292 real definition first, and we can just use the same value. */
3293 if (h->weakdef != NULL)
3294 {
3295 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3296 || h->weakdef->root.type == bfd_link_hash_defweak);
3297 h->root.u.def.section = h->weakdef->root.u.def.section;
3298 h->root.u.def.value = h->weakdef->root.u.def.value;
b34976b6 3299 return TRUE;
252b5132
RH
3300 }
3301
3302 /* This is a reference to a symbol defined by a dynamic object which
3303 is not a function. */
3304
3305 /* If we are creating a shared library, we must presume that the
3306 only references to the symbol are via the global offset table.
3307 For such cases we need not do anything here; the relocations will
3308 be handled correctly by relocate_section. */
3309 if (info->shared)
b34976b6 3310 return TRUE;
252b5132
RH
3311
3312 /* We must allocate the symbol in our .dynbss section, which will
3313 become part of the .bss section of the executable. There will be
3314 an entry for this symbol in the .dynsym section. The dynamic
3315 object will contain position independent code, so all references
3316 from the dynamic object to this symbol will go through the global
3317 offset table. The dynamic linker will use the .dynsym entry to
3318 determine the address it must put in the global offset table, so
3319 both the dynamic object and the regular object will refer to the
3320 same memory location for the variable. */
252b5132
RH
3321 s = bfd_get_section_by_name (dynobj, ".dynbss");
3322 BFD_ASSERT (s != NULL);
3323
3324 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
3325 copy the initial value out of the dynamic object and into the
3326 runtime process image. We need to remember the offset into the
3327 .rel.bss section we are going to use. */
3328 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3329 {
3330 asection *srel;
3331
3332 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
3333 BFD_ASSERT (srel != NULL);
3334 srel->_raw_size += sizeof (Elf32_External_Rel);
3335 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3336 }
3337
3338 /* We need to figure out the alignment required for this symbol. I
3339 have no idea how ELF linkers handle this. */
3340 power_of_two = bfd_log2 (h->size);
3341 if (power_of_two > 3)
3342 power_of_two = 3;
3343
3344 /* Apply the required alignment. */
3345 s->_raw_size = BFD_ALIGN (s->_raw_size,
3346 (bfd_size_type) (1 << power_of_two));
3347 if (power_of_two > bfd_get_section_alignment (dynobj, s))
3348 {
3349 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
b34976b6 3350 return FALSE;
252b5132
RH
3351 }
3352
3353 /* Define the symbol as being at this point in the section. */
3354 h->root.u.def.section = s;
3355 h->root.u.def.value = s->_raw_size;
3356
3357 /* Increment the section size to make room for the symbol. */
3358 s->_raw_size += h->size;
3359
b34976b6 3360 return TRUE;
252b5132
RH
3361}
3362
5e681ec4
PB
3363/* Allocate space in .plt, .got and associated reloc sections for
3364 dynamic relocs. */
3365
3366static bfd_boolean
3367allocate_dynrelocs (h, inf)
3368 struct elf_link_hash_entry *h;
3369 PTR inf;
3370{
3371 struct bfd_link_info *info;
3372 struct elf32_arm_link_hash_table *htab;
3373 struct elf32_arm_link_hash_entry *eh;
3374 struct elf32_arm_relocs_copied *p;
3375
3376 if (h->root.type == bfd_link_hash_indirect)
3377 return TRUE;
3378
3379 if (h->root.type == bfd_link_hash_warning)
3380 /* When warning symbols are created, they **replace** the "real"
3381 entry in the hash table, thus we never get to see the real
3382 symbol in a hash traversal. So look at it now. */
3383 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3384
3385 info = (struct bfd_link_info *) inf;
3386 htab = elf32_arm_hash_table (info);
3387
3388 if (htab->root.dynamic_sections_created
3389 && h->plt.refcount > 0)
3390 {
3391 /* Make sure this symbol is output as a dynamic symbol.
3392 Undefined weak syms won't yet be marked as dynamic. */
3393 if (h->dynindx == -1
3394 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3395 {
c152c796 3396 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB
3397 return FALSE;
3398 }
3399
3400 if (info->shared
7359ea65 3401 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5e681ec4
PB
3402 {
3403 asection *s = htab->splt;
3404
3405 /* If this is the first .plt entry, make room for the special
3406 first entry. */
3407 if (s->_raw_size == 0)
3408 s->_raw_size += PLT_HEADER_SIZE;
3409
3410 h->plt.offset = s->_raw_size;
3411
3412 /* If this symbol is not defined in a regular file, and we are
3413 not generating a shared library, then set the symbol to this
3414 location in the .plt. This is required to make function
3415 pointers compare as equal between the normal executable and
3416 the shared library. */
3417 if (! info->shared
3418 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3419 {
3420 h->root.u.def.section = s;
3421 h->root.u.def.value = h->plt.offset;
3422 }
3423
3424 /* Make room for this entry. */
3425 s->_raw_size += PLT_ENTRY_SIZE;
3426
3427 /* We also need to make an entry in the .got.plt section, which
3428 will be placed in the .got section by the linker script. */
3429 htab->sgotplt->_raw_size += 4;
3430
3431 /* We also need to make an entry in the .rel.plt section. */
3432 htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
3433 }
3434 else
3435 {
3436 h->plt.offset = (bfd_vma) -1;
3437 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3438 }
3439 }
3440 else
3441 {
3442 h->plt.offset = (bfd_vma) -1;
3443 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3444 }
3445
3446 if (h->got.refcount > 0)
3447 {
3448 asection *s;
3449 bfd_boolean dyn;
3450
3451 /* Make sure this symbol is output as a dynamic symbol.
3452 Undefined weak syms won't yet be marked as dynamic. */
3453 if (h->dynindx == -1
3454 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3455 {
c152c796 3456 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB
3457 return FALSE;
3458 }
3459
3460 s = htab->sgot;
3461 h->got.offset = s->_raw_size;
3462 s->_raw_size += 4;
3463 dyn = htab->root.dynamic_sections_created;
3464 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3465 || h->root.type != bfd_link_hash_undefweak)
3466 && (info->shared
3467 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3468 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
3469 }
3470 else
3471 h->got.offset = (bfd_vma) -1;
3472
3473 eh = (struct elf32_arm_link_hash_entry *) h;
3474 if (eh->relocs_copied == NULL)
3475 return TRUE;
3476
3477 /* In the shared -Bsymbolic case, discard space allocated for
3478 dynamic pc-relative relocs against symbols which turn out to be
3479 defined in regular objects. For the normal shared case, discard
3480 space for pc-relative relocs that have become local due to symbol
3481 visibility changes. */
3482
3483 if (info->shared)
3484 {
7359ea65
DJ
3485 /* Discard relocs on undefined weak syms with non-default
3486 visibility. */
5e681ec4
PB
3487 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3488 && h->root.type == bfd_link_hash_undefweak)
3489 eh->relocs_copied = NULL;
3490 }
3491 else
3492 {
3493 /* For the non-shared case, discard space for relocs against
3494 symbols which turn out to need copy relocs or are not
3495 dynamic. */
3496
3497 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3498 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3499 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3500 || (htab->root.dynamic_sections_created
3501 && (h->root.type == bfd_link_hash_undefweak
3502 || h->root.type == bfd_link_hash_undefined))))
3503 {
3504 /* Make sure this symbol is output as a dynamic symbol.
3505 Undefined weak syms won't yet be marked as dynamic. */
3506 if (h->dynindx == -1
3507 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3508 {
c152c796 3509 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB
3510 return FALSE;
3511 }
3512
3513 /* If that succeeded, we know we'll be keeping all the
3514 relocs. */
3515 if (h->dynindx != -1)
3516 goto keep;
3517 }
3518
3519 eh->relocs_copied = NULL;
3520
3521 keep: ;
3522 }
3523
3524 /* Finally, allocate space. */
3525 for (p = eh->relocs_copied; p != NULL; p = p->next)
3526 {
3527 asection *sreloc = elf_section_data (p->section)->sreloc;
3528 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
3529 }
3530
3531 return TRUE;
3532}
3533
252b5132
RH
3534/* Set the sizes of the dynamic sections. */
3535
b34976b6 3536static bfd_boolean
252b5132 3537elf32_arm_size_dynamic_sections (output_bfd, info)
99e4ae17 3538 bfd * output_bfd ATTRIBUTE_UNUSED;
252b5132
RH
3539 struct bfd_link_info * info;
3540{
3541 bfd * dynobj;
3542 asection * s;
b34976b6
AM
3543 bfd_boolean plt;
3544 bfd_boolean relocs;
5e681ec4
PB
3545 bfd *ibfd;
3546 struct elf32_arm_link_hash_table *htab;
252b5132 3547
5e681ec4 3548 htab = elf32_arm_hash_table (info);
252b5132
RH
3549 dynobj = elf_hash_table (info)->dynobj;
3550 BFD_ASSERT (dynobj != NULL);
3551
3552 if (elf_hash_table (info)->dynamic_sections_created)
3553 {
3554 /* Set the contents of the .interp section to the interpreter. */
893c4fe2 3555 if (info->executable)
252b5132
RH
3556 {
3557 s = bfd_get_section_by_name (dynobj, ".interp");
3558 BFD_ASSERT (s != NULL);
3559 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3560 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3561 }
3562 }
5e681ec4
PB
3563
3564 /* Set up .got offsets for local syms, and space for local dynamic
3565 relocs. */
3566 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
252b5132 3567 {
5e681ec4
PB
3568 bfd_signed_vma *local_got;
3569 bfd_signed_vma *end_local_got;
3570 char *local_tls_type;
3571 bfd_size_type locsymcount;
3572 Elf_Internal_Shdr *symtab_hdr;
3573 asection *srel;
3574
3575 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3576 continue;
3577
3578 for (s = ibfd->sections; s != NULL; s = s->next)
3579 {
3580 struct elf32_arm_relocs_copied *p;
3581
3582 for (p = *((struct elf32_arm_relocs_copied **)
3583 &elf_section_data (s)->local_dynrel);
3584 p != NULL;
3585 p = p->next)
3586 {
3587 if (!bfd_is_abs_section (p->section)
3588 && bfd_is_abs_section (p->section->output_section))
3589 {
3590 /* Input section has been discarded, either because
3591 it is a copy of a linkonce section or due to
3592 linker script /DISCARD/, so we'll be discarding
3593 the relocs too. */
3594 }
3595 else if (p->count != 0)
3596 {
3597 srel = elf_section_data (p->section)->sreloc;
3598 srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
3599 if ((p->section->output_section->flags & SEC_READONLY) != 0)
3600 info->flags |= DF_TEXTREL;
3601 }
3602 }
3603 }
3604
3605 local_got = elf_local_got_refcounts (ibfd);
3606 if (!local_got)
3607 continue;
3608
3609 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3610 locsymcount = symtab_hdr->sh_info;
3611 end_local_got = local_got + locsymcount;
3612 s = htab->sgot;
3613 srel = htab->srelgot;
3614 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
3615 {
3616 if (*local_got > 0)
3617 {
3618 *local_got = s->_raw_size;
3619 s->_raw_size += 4;
3620 if (info->shared)
3621 srel->_raw_size += sizeof (Elf32_External_Rel);
3622 }
3623 else
3624 *local_got = (bfd_vma) -1;
3625 }
252b5132
RH
3626 }
3627
5e681ec4
PB
3628 /* Allocate global sym .plt and .got entries, and space for global
3629 sym dynamic relocs. */
3630 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (PTR) info);
252b5132
RH
3631
3632 /* The check_relocs and adjust_dynamic_symbol entry points have
3633 determined the sizes of the various dynamic sections. Allocate
3634 memory for them. */
b34976b6
AM
3635 plt = FALSE;
3636 relocs = FALSE;
252b5132
RH
3637 for (s = dynobj->sections; s != NULL; s = s->next)
3638 {
3639 const char * name;
b34976b6 3640 bfd_boolean strip;
252b5132
RH
3641
3642 if ((s->flags & SEC_LINKER_CREATED) == 0)
3643 continue;
3644
3645 /* It's OK to base decisions on the section name, because none
3646 of the dynobj section names depend upon the input files. */
3647 name = bfd_get_section_name (dynobj, s);
3648
b34976b6 3649 strip = FALSE;
252b5132 3650
24a1ba0f 3651 if (strcmp (name, ".plt") == 0)
252b5132
RH
3652 {
3653 if (s->_raw_size == 0)
3654 {
3655 /* Strip this section if we don't need it; see the
3656 comment below. */
b34976b6 3657 strip = TRUE;
252b5132
RH
3658 }
3659 else
3660 {
3661 /* Remember whether there is a PLT. */
b34976b6 3662 plt = TRUE;
252b5132
RH
3663 }
3664 }
3665 else if (strncmp (name, ".rel", 4) == 0)
3666 {
3667 if (s->_raw_size == 0)
3668 {
3669 /* If we don't need this section, strip it from the
3670 output file. This is mostly to handle .rel.bss and
3671 .rel.plt. We must create both sections in
3672 create_dynamic_sections, because they must be created
3673 before the linker maps input sections to output
3674 sections. The linker does that before
3675 adjust_dynamic_symbol is called, and it is that
3676 function which decides whether anything needs to go
3677 into these sections. */
b34976b6 3678 strip = TRUE;
252b5132
RH
3679 }
3680 else
3681 {
252b5132
RH
3682 /* Remember whether there are any reloc sections other
3683 than .rel.plt. */
3684 if (strcmp (name, ".rel.plt") != 0)
b34976b6 3685 relocs = TRUE;
252b5132
RH
3686
3687 /* We use the reloc_count field as a counter if we need
3688 to copy relocs into the output file. */
3689 s->reloc_count = 0;
3690 }
3691 }
3692 else if (strncmp (name, ".got", 4) != 0)
3693 {
3694 /* It's not one of our sections, so don't allocate space. */
3695 continue;
3696 }
3697
3698 if (strip)
3699 {
52585bb8 3700 _bfd_strip_section_from_output (info, s);
252b5132
RH
3701 continue;
3702 }
3703
3704 /* Allocate memory for the section contents. */
3705 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3706 if (s->contents == NULL && s->_raw_size != 0)
b34976b6 3707 return FALSE;
252b5132
RH
3708 }
3709
3710 if (elf_hash_table (info)->dynamic_sections_created)
3711 {
3712 /* Add some entries to the .dynamic section. We fill in the
3713 values later, in elf32_arm_finish_dynamic_sections, but we
3714 must add the entries now so that we get the correct size for
3715 the .dynamic section. The DT_DEBUG entry is filled in by the
3716 dynamic linker and used by the debugger. */
dc810e39 3717#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3718 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39
AM
3719
3720 if (!info->shared)
252b5132 3721 {
dc810e39 3722 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3723 return FALSE;
252b5132
RH
3724 }
3725
3726 if (plt)
3727 {
dc810e39
AM
3728 if ( !add_dynamic_entry (DT_PLTGOT, 0)
3729 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3730 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3731 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3732 return FALSE;
252b5132
RH
3733 }
3734
3735 if (relocs)
3736 {
dc810e39
AM
3737 if ( !add_dynamic_entry (DT_REL, 0)
3738 || !add_dynamic_entry (DT_RELSZ, 0)
3739 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 3740 return FALSE;
252b5132
RH
3741 }
3742
99e4ae17 3743 if ((info->flags & DF_TEXTREL) != 0)
252b5132 3744 {
dc810e39 3745 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3746 return FALSE;
d6cf2879 3747 info->flags |= DF_TEXTREL;
252b5132
RH
3748 }
3749 }
dc810e39 3750#undef add_synamic_entry
252b5132 3751
b34976b6 3752 return TRUE;
252b5132
RH
3753}
3754
252b5132
RH
3755/* Finish up dynamic symbol handling. We set the contents of various
3756 dynamic sections here. */
3757
b34976b6 3758static bfd_boolean
252b5132
RH
3759elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3760 bfd * output_bfd;
3761 struct bfd_link_info * info;
3762 struct elf_link_hash_entry * h;
3763 Elf_Internal_Sym * sym;
3764{
3765 bfd * dynobj;
3766
3767 dynobj = elf_hash_table (info)->dynobj;
3768
3769 if (h->plt.offset != (bfd_vma) -1)
3770 {
3771 asection * splt;
3772 asection * sgot;
3773 asection * srel;
24a1ba0f
NC
3774 bfd_vma plt_index;
3775 bfd_vma got_offset;
947216bf
AM
3776 Elf_Internal_Rela rel;
3777 bfd_byte *loc;
5e681ec4 3778 bfd_vma got_displacement;
252b5132
RH
3779
3780 /* This symbol has an entry in the procedure linkage table. Set
3781 it up. */
3782
3783 BFD_ASSERT (h->dynindx != -1);
3784
3785 splt = bfd_get_section_by_name (dynobj, ".plt");
3786 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3787 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
24a1ba0f 3788 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
252b5132 3789
24a1ba0f
NC
3790 /* Get the index in the procedure linkage table which
3791 corresponds to this symbol. This is the index of this symbol
3792 in all the symbols for which we are making plt entries. The
3793 first entry in the procedure linkage table is reserved. */
5e681ec4 3794 plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
252b5132 3795
24a1ba0f
NC
3796 /* Get the offset into the .got table of the entry that
3797 corresponds to this function. Each .got entry is 4 bytes.
3798 The first three are reserved. */
3799 got_offset = (plt_index + 3) * 4;
252b5132 3800
5e681ec4
PB
3801 /* Calculate the displacement between the PLT slot and the
3802 entry in the GOT. */
3803 got_displacement = (sgot->output_section->vma
3804 + sgot->output_offset
3805 + got_offset
3806 - splt->output_section->vma
3807 - splt->output_offset
3808 - h->plt.offset
3809 - 8);
3810
3811 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
3812
252b5132 3813 /* Fill in the entry in the procedure linkage table. */
5e681ec4 3814 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
24a1ba0f 3815 splt->contents + h->plt.offset + 0);
5e681ec4 3816 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
24a1ba0f 3817 splt->contents + h->plt.offset + 4);
5e681ec4 3818 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
24a1ba0f 3819 splt->contents + h->plt.offset + 8);
5e681ec4
PB
3820#ifdef FOUR_WORD_PLT
3821 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
3822 splt->contents + h->plt.offset + 12);
3823#endif
252b5132 3824
24a1ba0f
NC
3825 /* Fill in the entry in the global offset table. */
3826 bfd_put_32 (output_bfd,
3827 (splt->output_section->vma
3828 + splt->output_offset),
3829 sgot->contents + got_offset);
5e681ec4 3830
252b5132
RH
3831 /* Fill in the entry in the .rel.plt section. */
3832 rel.r_offset = (sgot->output_section->vma
3833 + sgot->output_offset
24a1ba0f 3834 + got_offset);
252b5132 3835 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
947216bf
AM
3836 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
3837 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH
3838
3839 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3840 {
3841 /* Mark the symbol as undefined, rather than as defined in
3842 the .plt section. Leave the value alone. */
3843 sym->st_shndx = SHN_UNDEF;
d982ba73
PB
3844 /* If the symbol is weak, we do need to clear the value.
3845 Otherwise, the PLT entry would provide a definition for
3846 the symbol even if the symbol wasn't defined anywhere,
3847 and so the symbol would never be NULL. */
3848 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3849 == 0)
3850 sym->st_value = 0;
252b5132
RH
3851 }
3852 }
3853
3854 if (h->got.offset != (bfd_vma) -1)
3855 {
3856 asection * sgot;
3857 asection * srel;
947216bf
AM
3858 Elf_Internal_Rela rel;
3859 bfd_byte *loc;
252b5132
RH
3860
3861 /* This symbol has an entry in the global offset table. Set it
3862 up. */
252b5132
RH
3863 sgot = bfd_get_section_by_name (dynobj, ".got");
3864 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3865 BFD_ASSERT (sgot != NULL && srel != NULL);
3866
3867 rel.r_offset = (sgot->output_section->vma
3868 + sgot->output_offset
dc810e39 3869 + (h->got.offset &~ (bfd_vma) 1));
252b5132 3870
5e681ec4
PB
3871 /* If this is a static link, or it is a -Bsymbolic link and the
3872 symbol is defined locally or was forced to be local because
3873 of a version file, we just want to emit a RELATIVE reloc.
3874 The entry in the global offset table will already have been
3875 initialized in the relocate_section function. */
252b5132 3876 if (info->shared
5e681ec4
PB
3877 && SYMBOL_REFERENCES_LOCAL (info, h))
3878 {
3879 BFD_ASSERT((h->got.offset & 1) != 0);
3880 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3881 }
252b5132
RH
3882 else
3883 {
5e681ec4 3884 BFD_ASSERT((h->got.offset & 1) == 0);
252b5132
RH
3885 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3886 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3887 }
3888
947216bf
AM
3889 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
3890 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH
3891 }
3892
3893 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3894 {
3895 asection * s;
947216bf
AM
3896 Elf_Internal_Rela rel;
3897 bfd_byte *loc;
252b5132
RH
3898
3899 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH
3900 BFD_ASSERT (h->dynindx != -1
3901 && (h->root.type == bfd_link_hash_defined
3902 || h->root.type == bfd_link_hash_defweak));
3903
3904 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3905 ".rel.bss");
3906 BFD_ASSERT (s != NULL);
3907
3908 rel.r_offset = (h->root.u.def.value
3909 + h->root.u.def.section->output_section->vma
3910 + h->root.u.def.section->output_offset);
3911 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
947216bf
AM
3912 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
3913 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH
3914 }
3915
3916 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3917 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3918 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3919 sym->st_shndx = SHN_ABS;
3920
b34976b6 3921 return TRUE;
252b5132
RH
3922}
3923
3924/* Finish up the dynamic sections. */
3925
b34976b6 3926static bfd_boolean
252b5132
RH
3927elf32_arm_finish_dynamic_sections (output_bfd, info)
3928 bfd * output_bfd;
3929 struct bfd_link_info * info;
3930{
3931 bfd * dynobj;
3932 asection * sgot;
3933 asection * sdyn;
3934
3935 dynobj = elf_hash_table (info)->dynobj;
3936
3937 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3938 BFD_ASSERT (sgot != NULL);
3939 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3940
3941 if (elf_hash_table (info)->dynamic_sections_created)
3942 {
3943 asection *splt;
3944 Elf32_External_Dyn *dyncon, *dynconend;
3945
3946 splt = bfd_get_section_by_name (dynobj, ".plt");
24a1ba0f 3947 BFD_ASSERT (splt != NULL && sdyn != NULL);
252b5132
RH
3948
3949 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3950 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
9b485d32 3951
252b5132
RH
3952 for (; dyncon < dynconend; dyncon++)
3953 {
3954 Elf_Internal_Dyn dyn;
3955 const char * name;
3956 asection * s;
3957
3958 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3959
3960 switch (dyn.d_tag)
3961 {
3962 default:
3963 break;
3964
3965 case DT_PLTGOT:
3966 name = ".got";
3967 goto get_vma;
3968 case DT_JMPREL:
3969 name = ".rel.plt";
3970 get_vma:
3971 s = bfd_get_section_by_name (output_bfd, name);
3972 BFD_ASSERT (s != NULL);
3973 dyn.d_un.d_ptr = s->vma;
3974 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3975 break;
3976
3977 case DT_PLTRELSZ:
3978 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3979 BFD_ASSERT (s != NULL);
3980 if (s->_cooked_size != 0)
3981 dyn.d_un.d_val = s->_cooked_size;
3982 else
3983 dyn.d_un.d_val = s->_raw_size;
3984 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3985 break;
3986
3987 case DT_RELSZ:
3988 /* My reading of the SVR4 ABI indicates that the
3989 procedure linkage table relocs (DT_JMPREL) should be
3990 included in the overall relocs (DT_REL). This is
3991 what Solaris does. However, UnixWare can not handle
3992 that case. Therefore, we override the DT_RELSZ entry
3993 here to make it not include the JMPREL relocs. Since
3994 the linker script arranges for .rel.plt to follow all
3995 other relocation sections, we don't have to worry
3996 about changing the DT_REL entry. */
3997 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3998 if (s != NULL)
3999 {
4000 if (s->_cooked_size != 0)
4001 dyn.d_un.d_val -= s->_cooked_size;
4002 else
4003 dyn.d_un.d_val -= s->_raw_size;
4004 }
4005 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4006 break;
88f7bcd5
NC
4007
4008 /* Set the bottom bit of DT_INIT/FINI if the
4009 corresponding function is Thumb. */
4010 case DT_INIT:
4011 name = info->init_function;
4012 goto get_sym;
4013 case DT_FINI:
4014 name = info->fini_function;
4015 get_sym:
4016 /* If it wasn't set by elf_bfd_final_link
4cc11e76 4017 then there is nothing to adjust. */
88f7bcd5
NC
4018 if (dyn.d_un.d_val != 0)
4019 {
4020 struct elf_link_hash_entry * eh;
4021
4022 eh = elf_link_hash_lookup (elf_hash_table (info), name,
b34976b6 4023 FALSE, FALSE, TRUE);
88f7bcd5
NC
4024 if (eh != (struct elf_link_hash_entry *) NULL
4025 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
4026 {
4027 dyn.d_un.d_val |= 1;
b34976b6 4028 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
88f7bcd5
NC
4029 }
4030 }
4031 break;
252b5132
RH
4032 }
4033 }
4034
24a1ba0f 4035 /* Fill in the first entry in the procedure linkage table. */
252b5132 4036 if (splt->_raw_size > 0)
f7a74f8c 4037 {
5e681ec4
PB
4038 bfd_vma got_displacement;
4039
4040 /* Calculate the displacement between the PLT slot and &GOT[0]. */
4041 got_displacement = (sgot->output_section->vma
4042 + sgot->output_offset
4043 - splt->output_section->vma
4044 - splt->output_offset
4045 - 16);
4046
f7a74f8c
NC
4047 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
4048 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
4049 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
4050 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5e681ec4
PB
4051#ifdef FOUR_WORD_PLT
4052 /* The displacement value goes in the otherwise-unused last word of
4053 the second entry. */
4054 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
4055#else
4056 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
4057#endif
f7a74f8c 4058 }
252b5132
RH
4059
4060 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4061 really seem like the right value. */
4062 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4063 }
4064
4065 /* Fill in the first three entries in the global offset table. */
4066 if (sgot->_raw_size > 0)
4067 {
4068 if (sdyn == NULL)
4069 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4070 else
4071 bfd_put_32 (output_bfd,
4072 sdyn->output_section->vma + sdyn->output_offset,
4073 sgot->contents);
4074 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4075 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4076 }
4077
4078 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4079
b34976b6 4080 return TRUE;
252b5132
RH
4081}
4082
ba96a88f
NC
4083static void
4084elf32_arm_post_process_headers (abfd, link_info)
4085 bfd * abfd;
5f771d47 4086 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f 4087{
9b485d32 4088 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
e489d0ae 4089 struct elf32_arm_link_hash_table *globals;
ba96a88f
NC
4090
4091 i_ehdrp = elf_elfheader (abfd);
4092
4093 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
4094 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
e489d0ae 4095
93204d3a
PB
4096 if (link_info)
4097 {
4098 globals = elf32_arm_hash_table (link_info);
4099 if (globals->byteswap_code)
4100 i_ehdrp->e_flags |= EF_ARM_BE8;
4101 }
ba96a88f
NC
4102}
4103
99e4ae17 4104static enum elf_reloc_type_class
f51e552e
AM
4105elf32_arm_reloc_type_class (rela)
4106 const Elf_Internal_Rela *rela;
99e4ae17 4107{
f51e552e 4108 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ
4109 {
4110 case R_ARM_RELATIVE:
4111 return reloc_class_relative;
4112 case R_ARM_JUMP_SLOT:
4113 return reloc_class_plt;
4114 case R_ARM_COPY:
4115 return reloc_class_copy;
4116 default:
4117 return reloc_class_normal;
4118 }
4119}
4120
e16bb312
NC
4121static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, Elf_Internal_Shdr *));
4122static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean));
4123
4124/* Set the right machine number for an Arm ELF file. */
4125
4126static bfd_boolean
4127elf32_arm_section_flags (flags, hdr)
4128 flagword *flags;
4129 Elf_Internal_Shdr *hdr;
4130{
4131 if (hdr->sh_type == SHT_NOTE)
4132 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
4133
4134 return TRUE;
4135}
4136
e489d0ae 4137static void
e16bb312
NC
4138elf32_arm_final_write_processing (abfd, linker)
4139 bfd *abfd;
4140 bfd_boolean linker ATTRIBUTE_UNUSED;
4141{
5a6c6817 4142 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
e16bb312
NC
4143}
4144
e489d0ae
PB
4145
4146/* Called for each symbol. Builds a section map based on mapping symbols.
4147 Does not alter any of the symbols. */
4148
4149static bfd_boolean
4150elf32_arm_output_symbol_hook (struct bfd_link_info *info,
4151 const char *name,
4152 Elf_Internal_Sym *elfsym,
4153 asection *input_sec,
4154 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
4155{
4156 int mapcount;
4157 elf32_arm_section_map *map;
4158 struct elf32_arm_link_hash_table *globals;
4159
4160 /* Only do this on final link. */
4161 if (info->relocatable)
4162 return TRUE;
4163
4164 /* Only build a map if we need to byteswap code. */
4165 globals = elf32_arm_hash_table (info);
4166 if (!globals->byteswap_code)
4167 return TRUE;
4168
4169 /* We only want mapping symbols. */
4170 if (name == NULL
4171 || name[0] != '$'
4172 || (name[1] != 'a'
4173 && name[1] != 't'
4174 && name[1] != 'd'))
4175 return TRUE;
4176
4177 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
4178 map = elf32_arm_section_data (input_sec)->map;
4179 /* TODO: This may be inefficient, but we probably don't usually have many
4180 mapping symbols per section. */
4181 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
4182 elf32_arm_section_data (input_sec)->map = map;
4183
4184 map[mapcount - 1].vma = elfsym->st_value;
4185 map[mapcount - 1].type = name[1];
4186 return TRUE;
4187}
4188
4189
4190/* Allocate target specific section data. */
4191
4192static bfd_boolean
4193elf32_arm_new_section_hook (bfd *abfd, asection *sec)
4194{
4195 struct _arm_elf_section_data *sdata;
4196 bfd_size_type amt = sizeof (*sdata);
4197
4198 sdata = bfd_zalloc (abfd, amt);
4199 if (sdata == NULL)
4200 return FALSE;
4201 sec->used_by_bfd = sdata;
4202
4203 return _bfd_elf_new_section_hook (abfd, sec);
4204}
4205
4206
4207/* Used to order a list of mapping symbols by address. */
4208
4209static int
4210elf32_arm_compare_mapping (const void * a, const void * b)
4211{
4212 return ((const elf32_arm_section_map *) a)->vma
4213 > ((const elf32_arm_section_map *) b)->vma;
4214}
4215
4216
4217/* Do code byteswapping. Return FALSE afterwards so that the section is
4218 written out as normal. */
4219
4220static bfd_boolean
4221elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
4222 bfd_byte *contents)
4223{
4224 int mapcount;
4225 elf32_arm_section_map *map;
4226 bfd_vma ptr;
4227 bfd_vma end;
4228 bfd_vma offset;
4229 bfd_byte tmp;
4230 int i;
4231
4232 mapcount = elf32_arm_section_data (sec)->mapcount;
4233 map = elf32_arm_section_data (sec)->map;
4234
4235 if (mapcount == 0)
4236 return FALSE;
4237
4238 qsort (map, mapcount, sizeof (elf32_arm_section_map),
4239 elf32_arm_compare_mapping);
4240
4241 offset = sec->output_section->vma + sec->output_offset;
4242 ptr = map[0].vma - offset;
4243 for (i = 0; i < mapcount; i++)
4244 {
4245 if (i == mapcount - 1)
4246 end = bfd_section_size (output_bfd, sec);
4247 else
4248 end = map[i + 1].vma - offset;
4249
4250 switch (map[i].type)
4251 {
4252 case 'a':
4253 /* Byte swap code words. */
4254 while (ptr + 3 < end)
4255 {
4256 tmp = contents[ptr];
4257 contents[ptr] = contents[ptr + 3];
4258 contents[ptr + 3] = tmp;
4259 tmp = contents[ptr + 1];
4260 contents[ptr + 1] = contents[ptr + 2];
4261 contents[ptr + 2] = tmp;
4262 ptr += 4;
4263 }
4264 break;
4265
4266 case 't':
4267 /* Byte swap code halfwords. */
4268 while (ptr + 1 < end)
4269 {
4270 tmp = contents[ptr];
4271 contents[ptr] = contents[ptr + 1];
4272 contents[ptr + 1] = tmp;
4273 ptr += 2;
4274 }
4275 break;
4276
4277 case 'd':
4278 /* Leave data alone. */
4279 break;
4280 }
4281 ptr = end;
4282 }
93204d3a 4283 free (map);
e489d0ae
PB
4284 return FALSE;
4285}
4286
252b5132
RH
4287#define ELF_ARCH bfd_arch_arm
4288#define ELF_MACHINE_CODE EM_ARM
d0facd1b
NC
4289#ifdef __QNXTARGET__
4290#define ELF_MAXPAGESIZE 0x1000
4291#else
f21f3fe0 4292#define ELF_MAXPAGESIZE 0x8000
d0facd1b 4293#endif
252b5132 4294
99e4ae17
AJ
4295#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
4296#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH
4297#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
4298#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
4299#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 4300#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132 4301#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
e489d0ae 4302#define bfd_elf32_new_section_hook elf32_arm_new_section_hook
252b5132
RH
4303
4304#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
4305#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
4306#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
4307#define elf_backend_check_relocs elf32_arm_check_relocs
dc810e39 4308#define elf_backend_relocate_section elf32_arm_relocate_section
e489d0ae 4309#define elf_backend_write_section elf32_arm_write_section
252b5132 4310#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5e681ec4 4311#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
252b5132
RH
4312#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
4313#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
e489d0ae 4314#define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
252b5132 4315#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 4316#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 4317#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
c178919b 4318#define elf_backend_object_p elf32_arm_object_p
e16bb312
NC
4319#define elf_backend_section_flags elf32_arm_section_flags
4320#define elf_backend_final_write_processing elf32_arm_final_write_processing
5e681ec4 4321#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
252b5132 4322
5e681ec4 4323#define elf_backend_can_refcount 1
252b5132
RH
4324#define elf_backend_can_gc_sections 1
4325#define elf_backend_plt_readonly 1
4326#define elf_backend_want_got_plt 1
4327#define elf_backend_want_plt_sym 0
acf8aed4 4328#if !USE_REL
b491616a
AM
4329#define elf_backend_rela_normal 1
4330#endif
252b5132 4331
04f7c78d 4332#define elf_backend_got_header_size 12
04f7c78d 4333
252b5132 4334#include "elf32-target.h"
7e392df6 4335
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