Patch from David Mosberger-Tang.
[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)
955af222
PB
1364 && (r_type != R_ARM_REL32
1365 || !SYMBOL_CALLS_LOCAL (info, h))
7359ea65
DJ
1366 && (h == NULL
1367 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1368 || h->root.type != bfd_link_hash_undefweak)
1369 && r_type != R_ARM_PC24
1370 && r_type != R_ARM_PLT32)
252b5132 1371 {
947216bf
AM
1372 Elf_Internal_Rela outrel;
1373 bfd_byte *loc;
b34976b6 1374 bfd_boolean skip, relocate;
f21f3fe0 1375
252b5132
RH
1376 if (sreloc == NULL)
1377 {
1378 const char * name;
f21f3fe0 1379
252b5132
RH
1380 name = (bfd_elf_string_from_elf_section
1381 (input_bfd,
1382 elf_elfheader (input_bfd)->e_shstrndx,
1383 elf_section_data (input_section)->rel_hdr.sh_name));
1384 if (name == NULL)
1385 return bfd_reloc_notsupported;
f21f3fe0 1386
252b5132
RH
1387 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1388 && strcmp (bfd_get_section_name (input_bfd,
1389 input_section),
1390 name + 4) == 0);
f21f3fe0 1391
252b5132
RH
1392 sreloc = bfd_get_section_by_name (dynobj, name);
1393 BFD_ASSERT (sreloc != NULL);
1394 }
f21f3fe0 1395
b34976b6
AM
1396 skip = FALSE;
1397 relocate = FALSE;
f21f3fe0 1398
c629eae0
JJ
1399 outrel.r_offset =
1400 _bfd_elf_section_offset (output_bfd, info, input_section,
1401 rel->r_offset);
1402 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 1403 skip = TRUE;
0bb2d96a 1404 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 1405 skip = TRUE, relocate = TRUE;
252b5132
RH
1406 outrel.r_offset += (input_section->output_section->vma
1407 + input_section->output_offset);
f21f3fe0 1408
252b5132 1409 if (skip)
0bb2d96a 1410 memset (&outrel, 0, sizeof outrel);
5e681ec4
PB
1411 else if (h != NULL
1412 && h->dynindx != -1
7359ea65 1413 && (!info->shared
5e681ec4
PB
1414 || !info->symbolic
1415 || (h->elf_link_hash_flags
1416 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1417 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH
1418 else
1419 {
5e681ec4
PB
1420 /* This symbol is local, or marked to become local. */
1421 relocate = TRUE;
1422 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
252b5132 1423 }
f21f3fe0 1424
947216bf
AM
1425 loc = sreloc->contents;
1426 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
1427 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
9a5aca8c 1428
f21f3fe0 1429 /* If this reloc is against an external symbol, we do not want to
252b5132 1430 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 1431 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH
1432 if (! relocate)
1433 return bfd_reloc_ok;
9a5aca8c 1434
f21f3fe0 1435 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH
1436 contents, rel->r_offset, value,
1437 (bfd_vma) 0);
1438 }
1439 else switch (r_type)
1440 {
dfc5f959
NC
1441#ifndef OLD_ARM_ABI
1442 case R_ARM_XPC25: /* Arm BLX instruction. */
1443#endif
1444 case R_ARM_PC24: /* Arm B/BL instruction */
7359ea65 1445 case R_ARM_PLT32:
dfc5f959
NC
1446#ifndef OLD_ARM_ABI
1447 if (r_type == R_ARM_XPC25)
252b5132 1448 {
dfc5f959
NC
1449 /* Check for Arm calling Arm function. */
1450 /* FIXME: Should we translate the instruction into a BL
1451 instruction instead ? */
1452 if (sym_flags != STT_ARM_TFUNC)
8f615d07 1453 (*_bfd_error_handler) (_("\
dfc5f959 1454%s: Warning: Arm BLX instruction targets Arm function '%s'."),
8f615d07
AM
1455 bfd_archive_filename (input_bfd),
1456 h ? h->root.root.string : "(local)");
dfc5f959
NC
1457 }
1458 else
1459#endif
1460 {
1461 /* Check for Arm calling Thumb function. */
1462 if (sym_flags == STT_ARM_TFUNC)
1463 {
1464 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1465 input_section, hit_data, sym_sec, rel->r_offset,
1466 signed_addend, value);
1467 return bfd_reloc_ok;
1468 }
252b5132 1469 }
ba96a88f
NC
1470
1471 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1472 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1473 {
1474 /* The old way of doing things. Trearing the addend as a
1475 byte sized field and adding in the pipeline offset. */
ba96a88f
NC
1476 value -= (input_section->output_section->vma
1477 + input_section->output_offset);
1478 value -= rel->r_offset;
1479 value += addend;
f21f3fe0 1480
ba96a88f
NC
1481 if (! globals->no_pipeline_knowledge)
1482 value -= 8;
1483 }
1484 else
1485 {
1486 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1487 where:
1488 S is the address of the symbol in the relocation.
1489 P is address of the instruction being relocated.
1490 A is the addend (extracted from the instruction) in bytes.
f21f3fe0 1491
ba96a88f
NC
1492 S is held in 'value'.
1493 P is the base address of the section containing the instruction
1494 plus the offset of the reloc into that section, ie:
1495 (input_section->output_section->vma +
1496 input_section->output_offset +
1497 rel->r_offset).
1498 A is the addend, converted into bytes, ie:
1499 (signed_addend * 4)
1500
1501 Note: None of these operations have knowledge of the pipeline
1502 size of the processor, thus it is up to the assembler to encode
1503 this information into the addend. */
ba96a88f
NC
1504 value -= (input_section->output_section->vma
1505 + input_section->output_offset);
1506 value -= rel->r_offset;
1507 value += (signed_addend << howto->size);
f21f3fe0 1508
ba96a88f
NC
1509 /* Previous versions of this code also used to add in the pipeline
1510 offset here. This is wrong because the linker is not supposed
1511 to know about such things, and one day it might change. In order
1512 to support old binaries that need the old behaviour however, so
1513 we attempt to detect which ABI was used to create the reloc. */
1514 if (! globals->no_pipeline_knowledge)
f21f3fe0 1515 {
ba96a88f 1516 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
f21f3fe0 1517
ba96a88f 1518 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1519
ba96a88f
NC
1520 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1521 value -= 8;
1522 }
1523 }
23080146 1524
dcb5e6e6
NC
1525 signed_addend = value;
1526 signed_addend >>= howto->rightshift;
9a5aca8c 1527
59f2c4e7
NC
1528 /* It is not an error for an undefined weak reference to be
1529 out of range. Any program that branches to such a symbol
9a5aca8c
AM
1530 is going to crash anyway, so there is no point worrying
1531 about getting the destination exactly right. */
59f2c4e7
NC
1532 if (! h || h->root.type != bfd_link_hash_undefweak)
1533 {
9b485d32 1534 /* Perform a signed range check. */
dcb5e6e6 1535 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC
1536 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1537 return bfd_reloc_overflow;
1538 }
9a5aca8c 1539
dcb5e6e6
NC
1540#ifndef OLD_ARM_ABI
1541 /* If necessary set the H bit in the BLX instruction. */
1542 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1543 value = (signed_addend & howto->dst_mask)
1544 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1545 | (1 << 24);
1546 else
1547#endif
1548 value = (signed_addend & howto->dst_mask)
1549 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 1550 break;
f21f3fe0 1551
252b5132
RH
1552 case R_ARM_ABS32:
1553 value += addend;
1554 if (sym_flags == STT_ARM_TFUNC)
1555 value |= 1;
1556 break;
f21f3fe0 1557
252b5132
RH
1558 case R_ARM_REL32:
1559 value -= (input_section->output_section->vma
62efb346 1560 + input_section->output_offset + rel->r_offset);
252b5132
RH
1561 value += addend;
1562 break;
1563 }
f21f3fe0 1564
252b5132
RH
1565 bfd_put_32 (input_bfd, value, hit_data);
1566 return bfd_reloc_ok;
1567
1568 case R_ARM_ABS8:
1569 value += addend;
1570 if ((long) value > 0x7f || (long) value < -0x80)
1571 return bfd_reloc_overflow;
1572
1573 bfd_put_8 (input_bfd, value, hit_data);
1574 return bfd_reloc_ok;
1575
1576 case R_ARM_ABS16:
1577 value += addend;
1578
1579 if ((long) value > 0x7fff || (long) value < -0x8000)
1580 return bfd_reloc_overflow;
1581
1582 bfd_put_16 (input_bfd, value, hit_data);
1583 return bfd_reloc_ok;
1584
1585 case R_ARM_ABS12:
1586 /* Support ldr and str instruction for the arm */
1587 /* Also thumb b (unconditional branch). ??? Really? */
1588 value += addend;
1589
1590 if ((long) value > 0x7ff || (long) value < -0x800)
1591 return bfd_reloc_overflow;
1592
1593 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1594 bfd_put_32 (input_bfd, value, hit_data);
1595 return bfd_reloc_ok;
1596
1597 case R_ARM_THM_ABS5:
9b485d32 1598 /* Support ldr and str instructions for the thumb. */
acf8aed4 1599#if USE_REL
252b5132
RH
1600 /* Need to refetch addend. */
1601 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1602 /* ??? Need to determine shift amount from operand size. */
1603 addend >>= howto->rightshift;
1604#endif
1605 value += addend;
1606
1607 /* ??? Isn't value unsigned? */
1608 if ((long) value > 0x1f || (long) value < -0x10)
1609 return bfd_reloc_overflow;
1610
1611 /* ??? Value needs to be properly shifted into place first. */
1612 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1613 bfd_put_16 (input_bfd, value, hit_data);
1614 return bfd_reloc_ok;
1615
dfc5f959
NC
1616#ifndef OLD_ARM_ABI
1617 case R_ARM_THM_XPC22:
1618#endif
252b5132 1619 case R_ARM_THM_PC22:
dfc5f959 1620 /* Thumb BL (branch long instruction). */
252b5132 1621 {
b34976b6
AM
1622 bfd_vma relocation;
1623 bfd_boolean overflow = FALSE;
1624 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1625 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
df212a7e 1626 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
ba96a88f 1627 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
b34976b6 1628 bfd_vma check;
252b5132 1629 bfd_signed_vma signed_check;
252b5132 1630
acf8aed4 1631#if USE_REL
252b5132
RH
1632 /* Need to refetch the addend and squish the two 11 bit pieces
1633 together. */
1634 {
ba96a88f
NC
1635 bfd_vma upper = upper_insn & 0x7ff;
1636 bfd_vma lower = lower_insn & 0x7ff;
9b485d32 1637 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
252b5132 1638 addend = (upper << 12) | (lower << 1);
ba96a88f 1639 signed_addend = addend;
252b5132
RH
1640 }
1641#endif
dfc5f959
NC
1642#ifndef OLD_ARM_ABI
1643 if (r_type == R_ARM_THM_XPC22)
1644 {
1645 /* Check for Thumb to Thumb call. */
1646 /* FIXME: Should we translate the instruction into a BL
1647 instruction instead ? */
1648 if (sym_flags == STT_ARM_TFUNC)
8f615d07 1649 (*_bfd_error_handler) (_("\
dfc5f959 1650%s: Warning: Thumb BLX instruction targets thumb function '%s'."),
8f615d07
AM
1651 bfd_archive_filename (input_bfd),
1652 h ? h->root.root.string : "(local)");
dfc5f959
NC
1653 }
1654 else
1655#endif
252b5132 1656 {
dfc5f959
NC
1657 /* If it is not a call to Thumb, assume call to Arm.
1658 If it is a call relative to a section name, then it is not a
1659 function call at all, but rather a long jump. */
1660 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1661 {
1662 if (elf32_thumb_to_arm_stub
1663 (info, sym_name, input_bfd, output_bfd, input_section,
1664 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1665 return bfd_reloc_ok;
1666 else
1667 return bfd_reloc_dangerous;
1668 }
252b5132 1669 }
f21f3fe0 1670
ba96a88f 1671 relocation = value + signed_addend;
f21f3fe0 1672
252b5132 1673 relocation -= (input_section->output_section->vma
ba96a88f
NC
1674 + input_section->output_offset
1675 + rel->r_offset);
9a5aca8c 1676
ba96a88f
NC
1677 if (! globals->no_pipeline_knowledge)
1678 {
9b485d32 1679 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
9a5aca8c 1680
ba96a88f 1681 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1682
ba96a88f
NC
1683 /* Previous versions of this code also used to add in the pipline
1684 offset here. This is wrong because the linker is not supposed
1685 to know about such things, and one day it might change. In order
1686 to support old binaries that need the old behaviour however, so
1687 we attempt to detect which ABI was used to create the reloc. */
1688 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1689 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1690 || i_ehdrp->e_ident[EI_OSABI] == 0)
1691 relocation += 4;
1692 }
f21f3fe0 1693
252b5132
RH
1694 check = relocation >> howto->rightshift;
1695
1696 /* If this is a signed value, the rightshift just dropped
1697 leading 1 bits (assuming twos complement). */
1698 if ((bfd_signed_vma) relocation >= 0)
1699 signed_check = check;
1700 else
1701 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1702
252b5132 1703 /* Assumes two's complement. */
ba96a88f 1704 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
b34976b6 1705 overflow = TRUE;
252b5132 1706
df425bc0 1707#ifndef OLD_ARM_ABI
4f3c3dbb
NC
1708 if (r_type == R_ARM_THM_XPC22
1709 && ((lower_insn & 0x1800) == 0x0800))
c62e1cc3
NC
1710 /* For a BLX instruction, make sure that the relocation is rounded up
1711 to a word boundary. This follows the semantics of the instruction
1712 which specifies that bit 1 of the target address will come from bit
1713 1 of the base address. */
1714 relocation = (relocation + 2) & ~ 3;
99e4ae17 1715#endif
c62e1cc3
NC
1716 /* Put RELOCATION back into the insn. */
1717 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1718 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1719
252b5132
RH
1720 /* Put the relocated value back in the object file: */
1721 bfd_put_16 (input_bfd, upper_insn, hit_data);
1722 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1723
1724 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1725 }
1726 break;
1727
51c5503b
NC
1728 case R_ARM_THM_PC11:
1729 /* Thumb B (branch) instruction). */
1730 {
6cf9e9fe 1731 bfd_signed_vma relocation;
51c5503b
NC
1732 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1733 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
51c5503b
NC
1734 bfd_signed_vma signed_check;
1735
acf8aed4 1736#if USE_REL
51c5503b
NC
1737 /* Need to refetch addend. */
1738 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6cf9e9fe
NC
1739 if (addend & ((howto->src_mask + 1) >> 1))
1740 {
1741 signed_addend = -1;
1742 signed_addend &= ~ howto->src_mask;
1743 signed_addend |= addend;
1744 }
1745 else
1746 signed_addend = addend;
1747 /* The value in the insn has been right shifted. We need to
1748 undo this, so that we can perform the address calculation
1749 in terms of bytes. */
1750 signed_addend <<= howto->rightshift;
51c5503b 1751#endif
6cf9e9fe 1752 relocation = value + signed_addend;
51c5503b
NC
1753
1754 relocation -= (input_section->output_section->vma
1755 + input_section->output_offset
1756 + rel->r_offset);
1757
6cf9e9fe
NC
1758 relocation >>= howto->rightshift;
1759 signed_check = relocation;
1760 relocation &= howto->dst_mask;
51c5503b 1761 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
cedb70c5 1762
51c5503b
NC
1763 bfd_put_16 (input_bfd, relocation, hit_data);
1764
1765 /* Assumes two's complement. */
1766 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1767 return bfd_reloc_overflow;
1768
1769 return bfd_reloc_ok;
1770 }
cedb70c5 1771
1f433d93 1772#ifndef OLD_ARM_ABI
8375c36b
PB
1773 case R_ARM_ALU_PCREL7_0:
1774 case R_ARM_ALU_PCREL15_8:
1775 case R_ARM_ALU_PCREL23_15:
1776 {
1777 bfd_vma insn;
1778 bfd_vma relocation;
1779
1780 insn = bfd_get_32 (input_bfd, hit_data);
1781#if USE_REL
1782 /* Extract the addend. */
1783 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
1784 signed_addend = addend;
1785#endif
1786 relocation = value + signed_addend;
1787
1788 relocation -= (input_section->output_section->vma
1789 + input_section->output_offset
1790 + rel->r_offset);
1791 insn = (insn & ~0xfff)
1792 | ((howto->bitpos << 7) & 0xf00)
1793 | ((relocation >> howto->bitpos) & 0xff);
1794 bfd_put_32 (input_bfd, value, hit_data);
1795 }
1796 return bfd_reloc_ok;
1f433d93 1797#endif
8375c36b 1798
252b5132
RH
1799 case R_ARM_GNU_VTINHERIT:
1800 case R_ARM_GNU_VTENTRY:
1801 return bfd_reloc_ok;
1802
1803 case R_ARM_COPY:
1804 return bfd_reloc_notsupported;
1805
1806 case R_ARM_GLOB_DAT:
1807 return bfd_reloc_notsupported;
1808
1809 case R_ARM_JUMP_SLOT:
1810 return bfd_reloc_notsupported;
1811
1812 case R_ARM_RELATIVE:
1813 return bfd_reloc_notsupported;
1814
1815 case R_ARM_GOTOFF:
1816 /* Relocation is relative to the start of the
1817 global offset table. */
1818
1819 BFD_ASSERT (sgot != NULL);
1820 if (sgot == NULL)
1821 return bfd_reloc_notsupported;
9a5aca8c 1822
cedb70c5 1823 /* If we are addressing a Thumb function, we need to adjust the
ee29b9fb
RE
1824 address by one, so that attempts to call the function pointer will
1825 correctly interpret it as Thumb code. */
1826 if (sym_flags == STT_ARM_TFUNC)
1827 value += 1;
1828
252b5132
RH
1829 /* Note that sgot->output_offset is not involved in this
1830 calculation. We always want the start of .got. If we
1831 define _GLOBAL_OFFSET_TABLE in a different way, as is
1832 permitted by the ABI, we might have to change this
9b485d32 1833 calculation. */
252b5132 1834 value -= sgot->output_section->vma;
f21f3fe0 1835 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ
1836 contents, rel->r_offset, value,
1837 (bfd_vma) 0);
252b5132
RH
1838
1839 case R_ARM_GOTPC:
a7c10850 1840 /* Use global offset table as symbol value. */
252b5132 1841 BFD_ASSERT (sgot != NULL);
f21f3fe0 1842
252b5132
RH
1843 if (sgot == NULL)
1844 return bfd_reloc_notsupported;
1845
1846 value = sgot->output_section->vma;
f21f3fe0 1847 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ
1848 contents, rel->r_offset, value,
1849 (bfd_vma) 0);
f21f3fe0 1850
252b5132
RH
1851 case R_ARM_GOT32:
1852 /* Relocation is to the entry for this symbol in the
9b485d32 1853 global offset table. */
252b5132
RH
1854 if (sgot == NULL)
1855 return bfd_reloc_notsupported;
f21f3fe0 1856
252b5132
RH
1857 if (h != NULL)
1858 {
1859 bfd_vma off;
5e681ec4 1860 bfd_boolean dyn;
f21f3fe0 1861
252b5132
RH
1862 off = h->got.offset;
1863 BFD_ASSERT (off != (bfd_vma) -1);
5e681ec4 1864 dyn = globals->root.dynamic_sections_created;
f21f3fe0 1865
5e681ec4 1866 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
50d6c878 1867 || (info->shared
5e681ec4
PB
1868 && SYMBOL_REFERENCES_LOCAL (info, h))
1869 || (ELF_ST_VISIBILITY (h->other)
1870 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH
1871 {
1872 /* This is actually a static link, or it is a -Bsymbolic link
1873 and the symbol is defined locally. We must initialize this
1874 entry in the global offset table. Since the offset must
1875 always be a multiple of 4, we use the least significant bit
1876 to record whether we have initialized it already.
f21f3fe0 1877
252b5132 1878 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1879 entry to initialize the value. This is done in the
9b485d32 1880 finish_dynamic_symbol routine. */
252b5132
RH
1881 if ((off & 1) != 0)
1882 off &= ~1;
1883 else
1884 {
ee29b9fb
RE
1885 /* If we are addressing a Thumb function, we need to
1886 adjust the address by one, so that attempts to
1887 call the function pointer will correctly
1888 interpret it as Thumb code. */
1889 if (sym_flags == STT_ARM_TFUNC)
1890 value |= 1;
1891
252b5132
RH
1892 bfd_put_32 (output_bfd, value, sgot->contents + off);
1893 h->got.offset |= 1;
1894 }
1895 }
f21f3fe0 1896
252b5132
RH
1897 value = sgot->output_offset + off;
1898 }
1899 else
1900 {
1901 bfd_vma off;
f21f3fe0 1902
252b5132
RH
1903 BFD_ASSERT (local_got_offsets != NULL &&
1904 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1905
252b5132 1906 off = local_got_offsets[r_symndx];
f21f3fe0 1907
252b5132
RH
1908 /* The offset must always be a multiple of 4. We use the
1909 least significant bit to record whether we have already
9b485d32 1910 generated the necessary reloc. */
252b5132
RH
1911 if ((off & 1) != 0)
1912 off &= ~1;
1913 else
1914 {
1915 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1916
252b5132
RH
1917 if (info->shared)
1918 {
1919 asection * srelgot;
947216bf
AM
1920 Elf_Internal_Rela outrel;
1921 bfd_byte *loc;
f21f3fe0 1922
252b5132
RH
1923 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1924 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1925
252b5132 1926 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1927 + sgot->output_offset
252b5132
RH
1928 + off);
1929 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
947216bf
AM
1930 loc = srelgot->contents;
1931 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
1932 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132 1933 }
f21f3fe0 1934
252b5132
RH
1935 local_got_offsets[r_symndx] |= 1;
1936 }
f21f3fe0 1937
252b5132
RH
1938 value = sgot->output_offset + off;
1939 }
9a5aca8c 1940
f21f3fe0 1941 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ
1942 contents, rel->r_offset, value,
1943 (bfd_vma) 0);
f21f3fe0 1944
252b5132
RH
1945 case R_ARM_SBREL32:
1946 return bfd_reloc_notsupported;
1947
1948 case R_ARM_AMP_VCALL9:
1949 return bfd_reloc_notsupported;
1950
1951 case R_ARM_RSBREL32:
1952 return bfd_reloc_notsupported;
1953
1954 case R_ARM_THM_RPC22:
1955 return bfd_reloc_notsupported;
1956
1957 case R_ARM_RREL32:
1958 return bfd_reloc_notsupported;
1959
1960 case R_ARM_RABS32:
1961 return bfd_reloc_notsupported;
1962
1963 case R_ARM_RPC24:
1964 return bfd_reloc_notsupported;
1965
1966 case R_ARM_RBASE:
1967 return bfd_reloc_notsupported;
1968
1969 default:
1970 return bfd_reloc_notsupported;
1971 }
1972}
1973
acf8aed4 1974#if USE_REL
98c1d4aa
NC
1975/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1976static void
1977arm_add_to_rel (abfd, address, howto, increment)
1978 bfd * abfd;
59f2c4e7 1979 bfd_byte * address;
98c1d4aa
NC
1980 reloc_howto_type * howto;
1981 bfd_signed_vma increment;
1982{
98c1d4aa
NC
1983 bfd_signed_vma addend;
1984
9a5aca8c 1985 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 1986 {
9a5aca8c
AM
1987 int upper_insn, lower_insn;
1988 int upper, lower;
98c1d4aa 1989
9a5aca8c
AM
1990 upper_insn = bfd_get_16 (abfd, address);
1991 lower_insn = bfd_get_16 (abfd, address + 2);
1992 upper = upper_insn & 0x7ff;
1993 lower = lower_insn & 0x7ff;
1994
1995 addend = (upper << 12) | (lower << 1);
ddda4409 1996 addend += increment;
9a5aca8c 1997 addend >>= 1;
98c1d4aa 1998
9a5aca8c
AM
1999 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
2000 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
2001
dc810e39
AM
2002 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
2003 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM
2004 }
2005 else
2006 {
2007 bfd_vma contents;
2008
2009 contents = bfd_get_32 (abfd, address);
2010
2011 /* Get the (signed) value from the instruction. */
2012 addend = contents & howto->src_mask;
2013 if (addend & ((howto->src_mask + 1) >> 1))
2014 {
2015 bfd_signed_vma mask;
2016
2017 mask = -1;
2018 mask &= ~ howto->src_mask;
2019 addend |= mask;
2020 }
2021
2022 /* Add in the increment, (which is a byte value). */
2023 switch (howto->type)
2024 {
2025 default:
2026 addend += increment;
2027 break;
2028
2029 case R_ARM_PC24:
2030 addend <<= howto->size;
dc810e39 2031 addend += increment;
9a5aca8c
AM
2032
2033 /* Should we check for overflow here ? */
2034
2035 /* Drop any undesired bits. */
2036 addend >>= howto->rightshift;
2037 break;
2038 }
2039
2040 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
2041
2042 bfd_put_32 (abfd, contents, address);
ddda4409 2043 }
98c1d4aa
NC
2044}
2045#endif /* USE_REL */
252b5132
RH
2046
2047/* Relocate an ARM ELF section. */
b34976b6 2048static bfd_boolean
252b5132
RH
2049elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
2050 contents, relocs, local_syms, local_sections)
b34976b6
AM
2051 bfd *output_bfd;
2052 struct bfd_link_info *info;
2053 bfd *input_bfd;
2054 asection *input_section;
2055 bfd_byte *contents;
2056 Elf_Internal_Rela *relocs;
2057 Elf_Internal_Sym *local_syms;
2058 asection **local_sections;
252b5132 2059{
b34976b6
AM
2060 Elf_Internal_Shdr *symtab_hdr;
2061 struct elf_link_hash_entry **sym_hashes;
2062 Elf_Internal_Rela *rel;
2063 Elf_Internal_Rela *relend;
2064 const char *name;
252b5132 2065
acf8aed4 2066#if !USE_REL
1049f94e 2067 if (info->relocatable)
b34976b6 2068 return TRUE;
b491616a
AM
2069#endif
2070
252b5132
RH
2071 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2072 sym_hashes = elf_sym_hashes (input_bfd);
2073
2074 rel = relocs;
2075 relend = relocs + input_section->reloc_count;
2076 for (; rel < relend; rel++)
2077 {
ba96a88f
NC
2078 int r_type;
2079 reloc_howto_type * howto;
2080 unsigned long r_symndx;
2081 Elf_Internal_Sym * sym;
2082 asection * sec;
252b5132 2083 struct elf_link_hash_entry * h;
ba96a88f
NC
2084 bfd_vma relocation;
2085 bfd_reloc_status_type r;
2086 arelent bfd_reloc;
f21f3fe0 2087
252b5132 2088 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 2089 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 2090
ba96a88f
NC
2091 if ( r_type == R_ARM_GNU_VTENTRY
2092 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH
2093 continue;
2094
dc810e39 2095 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
ba96a88f 2096 howto = bfd_reloc.howto;
252b5132 2097
acf8aed4 2098#if USE_REL
1049f94e 2099 if (info->relocatable)
252b5132 2100 {
1049f94e 2101 /* This is a relocatable link. We don't have to change
252b5132
RH
2102 anything, unless the reloc is against a section symbol,
2103 in which case we have to adjust according to where the
2104 section symbol winds up in the output section. */
2105 if (r_symndx < symtab_hdr->sh_info)
2106 {
2107 sym = local_syms + r_symndx;
2108 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2109 {
2110 sec = local_sections[r_symndx];
98c1d4aa 2111 arm_add_to_rel (input_bfd, contents + rel->r_offset,
dc810e39
AM
2112 howto,
2113 (bfd_signed_vma) (sec->output_offset
2114 + sym->st_value));
252b5132
RH
2115 }
2116 }
2117
2118 continue;
2119 }
b491616a 2120#endif
252b5132
RH
2121
2122 /* This is a final link. */
2123 h = NULL;
2124 sym = NULL;
2125 sec = NULL;
9b485d32 2126
252b5132
RH
2127 if (r_symndx < symtab_hdr->sh_info)
2128 {
2129 sym = local_syms + r_symndx;
2130 sec = local_sections[r_symndx];
acf8aed4 2131#if USE_REL
252b5132
RH
2132 relocation = (sec->output_section->vma
2133 + sec->output_offset
2134 + sym->st_value);
f8df10f4
JJ
2135 if ((sec->flags & SEC_MERGE)
2136 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2137 {
2138 asection *msec;
2139 bfd_vma addend, value;
2140
2141 if (howto->rightshift)
2142 {
2143 (*_bfd_error_handler)
2144 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
2145 bfd_archive_filename (input_bfd),
2146 bfd_get_section_name (input_bfd, input_section),
2147 (long) rel->r_offset, howto->name);
b34976b6 2148 return FALSE;
f8df10f4
JJ
2149 }
2150
2151 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2152
2153 /* Get the (signed) value from the instruction. */
2154 addend = value & howto->src_mask;
2155 if (addend & ((howto->src_mask + 1) >> 1))
2156 {
2157 bfd_signed_vma mask;
2158
2159 mask = -1;
2160 mask &= ~ howto->src_mask;
2161 addend |= mask;
2162 }
2163 msec = sec;
2164 addend =
c629eae0 2165 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
f8df10f4
JJ
2166 - relocation;
2167 addend += msec->output_section->vma + msec->output_offset;
2168 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
2169 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2170 }
2171#else
8517fae7 2172 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
f8df10f4 2173#endif
252b5132
RH
2174 }
2175 else
2176 {
560e09e9
NC
2177 bfd_boolean warned;
2178 bfd_boolean unresolved_reloc;
2179
b2a8e766
AM
2180 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2181 r_symndx, symtab_hdr, sym_hashes,
2182 h, sec, relocation,
2183 unresolved_reloc, warned);
560e09e9
NC
2184
2185 if (unresolved_reloc || relocation != 0)
252b5132 2186 {
252b5132 2187 /* In these cases, we don't need the relocation value.
f21f3fe0 2188 We check specially because in some obscure cases
9b485d32 2189 sec->output_section will be NULL. */
252b5132
RH
2190 switch (r_type)
2191 {
2192 case R_ARM_PC24:
2193 case R_ARM_ABS32:
6a360bf4 2194 case R_ARM_THM_PC22:
252b5132
RH
2195 if (info->shared
2196 && (
5e681ec4 2197 (!info->symbolic && h->dynindx != -1)
97eaf9de 2198 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132 2199 )
5e681ec4 2200 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
05924f36
PB
2201 && ((input_section->flags & SEC_ALLOC) != 0
2202 /* DWARF will emit R_ARM_ABS32 relocations in its
2203 sections against symbols defined externally
2204 in shared libraries. We can't do anything
2205 with them here. */
2206 || ((input_section->flags & SEC_DEBUGGING) != 0
2207 && (h->elf_link_hash_flags
2208 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132 2209 )
560e09e9 2210 relocation = 0;
252b5132 2211 break;
f21f3fe0 2212
252b5132 2213 case R_ARM_GOTPC:
560e09e9 2214 relocation = 0;
252b5132 2215 break;
f21f3fe0 2216
252b5132 2217 case R_ARM_GOT32:
50d6c878 2218 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
560e09e9 2219 (elf_hash_table (info)->dynamic_sections_created,
50d6c878
DJ
2220 info->shared, h))
2221 && (!info->shared
252b5132 2222 || (!info->symbolic && h->dynindx != -1)
50d6c878
DJ
2223 || (h->elf_link_hash_flags
2224 & ELF_LINK_HASH_DEF_REGULAR) == 0))
560e09e9 2225 relocation = 0;
252b5132 2226 break;
f21f3fe0 2227
252b5132
RH
2228 case R_ARM_PLT32:
2229 if (h->plt.offset != (bfd_vma)-1)
560e09e9 2230 relocation = 0;
252b5132 2231 break;
f21f3fe0 2232
252b5132 2233 default:
560e09e9
NC
2234 if (unresolved_reloc)
2235 _bfd_error_handler
2236 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
2237 bfd_archive_filename (input_bfd),
2238 r_type,
2239 h->root.root.string,
2240 bfd_get_section_name (input_bfd, input_section));
2241 break;
252b5132 2242 }
252b5132
RH
2243 }
2244 }
2245
2246 if (h != NULL)
2247 name = h->root.root.string;
2248 else
2249 {
2250 name = (bfd_elf_string_from_elf_section
2251 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2252 if (name == NULL || *name == '\0')
2253 name = bfd_section_name (input_bfd, sec);
2254 }
f21f3fe0 2255
252b5132
RH
2256 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2257 input_section, contents, rel,
2258 relocation, info, sec, name,
2259 (h ? ELF_ST_TYPE (h->type) :
780a67af 2260 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH
2261
2262 if (r != bfd_reloc_ok)
2263 {
2264 const char * msg = (const char *) 0;
2265
2266 switch (r)
2267 {
2268 case bfd_reloc_overflow:
cf919dfd
PB
2269 /* If the overflowing reloc was to an undefined symbol,
2270 we have already printed one error message and there
2271 is no point complaining again. */
2272 if ((! h ||
2273 h->root.type != bfd_link_hash_undefined)
2274 && (!((*info->callbacks->reloc_overflow)
2275 (info, name, howto->name, (bfd_vma) 0,
2276 input_bfd, input_section, rel->r_offset))))
b34976b6 2277 return FALSE;
252b5132
RH
2278 break;
2279
2280 case bfd_reloc_undefined:
2281 if (!((*info->callbacks->undefined_symbol)
2282 (info, name, input_bfd, input_section,
b34976b6
AM
2283 rel->r_offset, TRUE)))
2284 return FALSE;
252b5132
RH
2285 break;
2286
2287 case bfd_reloc_outofrange:
9b485d32 2288 msg = _("internal error: out of range error");
252b5132
RH
2289 goto common_error;
2290
2291 case bfd_reloc_notsupported:
9b485d32 2292 msg = _("internal error: unsupported relocation error");
252b5132
RH
2293 goto common_error;
2294
2295 case bfd_reloc_dangerous:
9b485d32 2296 msg = _("internal error: dangerous error");
252b5132
RH
2297 goto common_error;
2298
2299 default:
9b485d32 2300 msg = _("internal error: unknown error");
252b5132
RH
2301 /* fall through */
2302
2303 common_error:
2304 if (!((*info->callbacks->warning)
2305 (info, msg, name, input_bfd, input_section,
2306 rel->r_offset)))
b34976b6 2307 return FALSE;
252b5132
RH
2308 break;
2309 }
2310 }
2311 }
2312
b34976b6 2313 return TRUE;
252b5132
RH
2314}
2315
c178919b
NC
2316/* Set the right machine number. */
2317
2318static bfd_boolean
2319elf32_arm_object_p (abfd)
2320 bfd *abfd;
2321{
5a6c6817
NC
2322 unsigned int mach;
2323
2324 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
c178919b 2325
5a6c6817
NC
2326 if (mach != bfd_mach_arm_unknown)
2327 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
2328
2329 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
2330 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
e16bb312 2331
e16bb312 2332 else
5a6c6817 2333 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
c178919b
NC
2334
2335 return TRUE;
2336}
2337
fc830a83 2338/* Function to keep ARM specific flags in the ELF header. */
b34976b6 2339static bfd_boolean
252b5132
RH
2340elf32_arm_set_private_flags (abfd, flags)
2341 bfd *abfd;
2342 flagword flags;
2343{
2344 if (elf_flags_init (abfd)
2345 && elf_elfheader (abfd)->e_flags != flags)
2346 {
fc830a83
NC
2347 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2348 {
fd2ec330 2349 if (flags & EF_ARM_INTERWORK)
8f615d07 2350 (*_bfd_error_handler) (_("\
ae1a89b7 2351Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
8f615d07 2352 bfd_archive_filename (abfd));
fc830a83 2353 else
63b0f745 2354 _bfd_error_handler (_("\
ae1a89b7 2355Warning: Clearing the interworking flag of %s due to outside request"),
63b0f745 2356 bfd_archive_filename (abfd));
fc830a83 2357 }
252b5132
RH
2358 }
2359 else
2360 {
2361 elf_elfheader (abfd)->e_flags = flags;
b34976b6 2362 elf_flags_init (abfd) = TRUE;
252b5132
RH
2363 }
2364
b34976b6 2365 return TRUE;
252b5132
RH
2366}
2367
fc830a83 2368/* Copy backend specific data from one object module to another. */
9b485d32 2369
b34976b6 2370static bfd_boolean
252b5132
RH
2371elf32_arm_copy_private_bfd_data (ibfd, obfd)
2372 bfd *ibfd;
2373 bfd *obfd;
2374{
2375 flagword in_flags;
2376 flagword out_flags;
2377
fc830a83 2378 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132 2379 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 2380 return TRUE;
252b5132 2381
fc830a83 2382 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH
2383 out_flags = elf_elfheader (obfd)->e_flags;
2384
fc830a83
NC
2385 if (elf_flags_init (obfd)
2386 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2387 && in_flags != out_flags)
252b5132 2388 {
252b5132 2389 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 2390 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
b34976b6 2391 return FALSE;
252b5132
RH
2392
2393 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 2394 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
b34976b6 2395 return FALSE;
252b5132
RH
2396
2397 /* If the src and dest have different interworking flags
2398 then turn off the interworking bit. */
fd2ec330 2399 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 2400 {
fd2ec330 2401 if (out_flags & EF_ARM_INTERWORK)
63b0f745 2402 _bfd_error_handler (_("\
ae1a89b7 2403Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
06317a27 2404 bfd_get_filename (obfd),
63b0f745 2405 bfd_archive_filename (ibfd));
252b5132 2406
fd2ec330 2407 in_flags &= ~EF_ARM_INTERWORK;
252b5132 2408 }
1006ba19
PB
2409
2410 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB
2411 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2412 in_flags &= ~EF_ARM_PIC;
252b5132
RH
2413 }
2414
2415 elf_elfheader (obfd)->e_flags = in_flags;
b34976b6 2416 elf_flags_init (obfd) = TRUE;
252b5132 2417
b34976b6 2418 return TRUE;
252b5132
RH
2419}
2420
2421/* Merge backend specific data from an object file to the output
2422 object file when linking. */
9b485d32 2423
b34976b6 2424static bfd_boolean
252b5132 2425elf32_arm_merge_private_bfd_data (ibfd, obfd)
fc830a83
NC
2426 bfd * ibfd;
2427 bfd * obfd;
252b5132
RH
2428{
2429 flagword out_flags;
2430 flagword in_flags;
b34976b6 2431 bfd_boolean flags_compatible = TRUE;
cf919dfd 2432 asection *sec;
252b5132 2433
9b485d32 2434 /* Check if we have the same endianess. */
82e51918 2435 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
b34976b6 2436 return FALSE;
1fe494a5 2437
252b5132
RH
2438 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2439 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 2440 return TRUE;
252b5132 2441
252b5132
RH
2442 /* The input BFD must have had its flags initialised. */
2443 /* The following seems bogus to me -- The flags are initialized in
2444 the assembler but I don't think an elf_flags_init field is
9b485d32 2445 written into the object. */
252b5132
RH
2446 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2447
2448 in_flags = elf_elfheader (ibfd)->e_flags;
2449 out_flags = elf_elfheader (obfd)->e_flags;
2450
2451 if (!elf_flags_init (obfd))
2452 {
fe077fa6
NC
2453 /* If the input is the default architecture and had the default
2454 flags then do not bother setting the flags for the output
2455 architecture, instead allow future merges to do this. If no
2456 future merges ever set these flags then they will retain their
2457 uninitialised values, which surprise surprise, correspond
252b5132 2458 to the default values. */
fe077fa6
NC
2459 if (bfd_get_arch_info (ibfd)->the_default
2460 && elf_elfheader (ibfd)->e_flags == 0)
b34976b6 2461 return TRUE;
252b5132 2462
b34976b6 2463 elf_flags_init (obfd) = TRUE;
252b5132
RH
2464 elf_elfheader (obfd)->e_flags = in_flags;
2465
2466 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2467 && bfd_get_arch_info (obfd)->the_default)
2468 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2469
b34976b6 2470 return TRUE;
252b5132
RH
2471 }
2472
5a6c6817
NC
2473 /* Determine what should happen if the input ARM architecture
2474 does not match the output ARM architecture. */
2475 if (! bfd_arm_merge_machines (ibfd, obfd))
2476 return FALSE;
e16bb312 2477
1006ba19 2478 /* Identical flags must be compatible. */
252b5132 2479 if (in_flags == out_flags)
b34976b6 2480 return TRUE;
252b5132 2481
35a0f415
DJ
2482 /* Check to see if the input BFD actually contains any sections. If
2483 not, its flags may not have been initialised either, but it
2484 cannot actually cause any incompatibility. Do not short-circuit
2485 dynamic objects; their section list may be emptied by
d1f161ea 2486 elf_link_add_object_symbols.
35a0f415 2487
d1f161ea
NC
2488 Also check to see if there are no code sections in the input.
2489 In this case there is no need to check for code specific flags.
2490 XXX - do we need to worry about floating-point format compatability
2491 in data sections ? */
35a0f415 2492 if (!(ibfd->flags & DYNAMIC))
cf919dfd 2493 {
35a0f415 2494 bfd_boolean null_input_bfd = TRUE;
d1f161ea 2495 bfd_boolean only_data_sections = TRUE;
35a0f415
DJ
2496
2497 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
cf919dfd 2498 {
35a0f415
DJ
2499 /* Ignore synthetic glue sections. */
2500 if (strcmp (sec->name, ".glue_7")
2501 && strcmp (sec->name, ".glue_7t"))
2502 {
d1f161ea
NC
2503 if ((bfd_get_section_flags (ibfd, sec)
2504 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
2505 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
2506 only_data_sections = FALSE;
2507
35a0f415
DJ
2508 null_input_bfd = FALSE;
2509 break;
2510 }
cf919dfd 2511 }
d1f161ea
NC
2512
2513 if (null_input_bfd || only_data_sections)
35a0f415 2514 return TRUE;
cf919dfd 2515 }
cf919dfd 2516
252b5132 2517 /* Complain about various flag mismatches. */
fc830a83
NC
2518 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2519 {
63b0f745 2520 _bfd_error_handler (_("\
6c571f00 2521ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"),
63b0f745
NC
2522 bfd_archive_filename (ibfd),
2523 (in_flags & EF_ARM_EABIMASK) >> 24,
06317a27 2524 bfd_get_filename (obfd),
63b0f745 2525 (out_flags & EF_ARM_EABIMASK) >> 24);
b34976b6 2526 return FALSE;
fc830a83 2527 }
252b5132 2528
1006ba19
PB
2529 /* Not sure what needs to be checked for EABI versions >= 1. */
2530 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2531 {
fd2ec330 2532 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19 2533 {
63b0f745 2534 _bfd_error_handler (_("\
6c571f00 2535ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"),
63b0f745
NC
2536 bfd_archive_filename (ibfd),
2537 in_flags & EF_ARM_APCS_26 ? 26 : 32,
06317a27 2538 bfd_get_filename (obfd),
63b0f745 2539 out_flags & EF_ARM_APCS_26 ? 26 : 32);
b34976b6 2540 flags_compatible = FALSE;
1006ba19 2541 }
252b5132 2542
fd2ec330 2543 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19 2544 {
5eefb65f
NC
2545 if (in_flags & EF_ARM_APCS_FLOAT)
2546 _bfd_error_handler (_("\
6c571f00 2547ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"),
5eefb65f
NC
2548 bfd_archive_filename (ibfd),
2549 bfd_get_filename (obfd));
2550 else
2551 _bfd_error_handler (_("\
6c571f00 2552ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"),
5eefb65f
NC
2553 bfd_archive_filename (ibfd),
2554 bfd_get_filename (obfd));
63b0f745 2555
b34976b6 2556 flags_compatible = FALSE;
1006ba19 2557 }
252b5132 2558
96a846ea 2559 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
1006ba19 2560 {
96a846ea
RE
2561 if (in_flags & EF_ARM_VFP_FLOAT)
2562 _bfd_error_handler (_("\
fde78edd 2563ERROR: %s uses VFP instructions, whereas %s does not"),
5eefb65f
NC
2564 bfd_archive_filename (ibfd),
2565 bfd_get_filename (obfd));
2566 else
96a846ea 2567 _bfd_error_handler (_("\
fde78edd
NC
2568ERROR: %s uses FPA instructions, whereas %s does not"),
2569 bfd_archive_filename (ibfd),
2570 bfd_get_filename (obfd));
2571
2572 flags_compatible = FALSE;
2573 }
2574
2575 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
2576 {
2577 if (in_flags & EF_ARM_MAVERICK_FLOAT)
2578 _bfd_error_handler (_("\
2579ERROR: %s uses Maverick instructions, whereas %s does not"),
2580 bfd_archive_filename (ibfd),
2581 bfd_get_filename (obfd));
2582 else
2583 _bfd_error_handler (_("\
5a21e886 2584ERROR: %s does not use Maverick instructions, whereas %s does"),
5eefb65f
NC
2585 bfd_archive_filename (ibfd),
2586 bfd_get_filename (obfd));
63b0f745 2587
b34976b6 2588 flags_compatible = FALSE;
1006ba19 2589 }
96a846ea
RE
2590
2591#ifdef EF_ARM_SOFT_FLOAT
2592 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
2593 {
2594 /* We can allow interworking between code that is VFP format
2595 layout, and uses either soft float or integer regs for
2596 passing floating point arguments and results. We already
2597 know that the APCS_FLOAT flags match; similarly for VFP
2598 flags. */
2599 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
2600 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
2601 {
2602 if (in_flags & EF_ARM_SOFT_FLOAT)
517662d4 2603 _bfd_error_handler (_("\
6c571f00 2604ERROR: %s uses software FP, whereas %s uses hardware FP"),
96a846ea
RE
2605 bfd_archive_filename (ibfd),
2606 bfd_get_filename (obfd));
2607 else
517662d4 2608 _bfd_error_handler (_("\
6c571f00 2609ERROR: %s uses hardware FP, whereas %s uses software FP"),
96a846ea
RE
2610 bfd_archive_filename (ibfd),
2611 bfd_get_filename (obfd));
2612
b34976b6 2613 flags_compatible = FALSE;
96a846ea
RE
2614 }
2615 }
ee43f35e 2616#endif
252b5132 2617
1006ba19 2618 /* Interworking mismatch is only a warning. */
fd2ec330 2619 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8f615d07 2620 {
e3c8793a
NC
2621 if (in_flags & EF_ARM_INTERWORK)
2622 {
2623 _bfd_error_handler (_("\
2624Warning: %s supports interworking, whereas %s does not"),
2625 bfd_archive_filename (ibfd),
cedb70c5 2626 bfd_get_filename (obfd));
e3c8793a
NC
2627 }
2628 else
2629 {
2630 _bfd_error_handler (_("\
2631Warning: %s does not support interworking, whereas %s does"),
2632 bfd_archive_filename (ibfd),
2633 bfd_get_filename (obfd));
2634 }
8f615d07 2635 }
252b5132 2636 }
63b0f745 2637
1006ba19 2638 return flags_compatible;
252b5132
RH
2639}
2640
9b485d32
NC
2641/* Display the flags field. */
2642
b34976b6 2643static bfd_boolean
252b5132
RH
2644elf32_arm_print_private_bfd_data (abfd, ptr)
2645 bfd *abfd;
2646 PTR ptr;
2647{
fc830a83
NC
2648 FILE * file = (FILE *) ptr;
2649 unsigned long flags;
252b5132
RH
2650
2651 BFD_ASSERT (abfd != NULL && ptr != NULL);
2652
2653 /* Print normal ELF private data. */
2654 _bfd_elf_print_private_bfd_data (abfd, ptr);
2655
fc830a83 2656 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC
2657 /* Ignore init flag - it may not be set, despite the flags field
2658 containing valid data. */
252b5132
RH
2659
2660 /* xgettext:c-format */
9b485d32 2661 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 2662
fc830a83
NC
2663 switch (EF_ARM_EABI_VERSION (flags))
2664 {
2665 case EF_ARM_EABI_UNKNOWN:
4cc11e76 2666 /* The following flag bits are GNU extensions and not part of the
fc830a83
NC
2667 official ARM ELF extended ABI. Hence they are only decoded if
2668 the EABI version is not set. */
fd2ec330 2669 if (flags & EF_ARM_INTERWORK)
9b485d32 2670 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 2671
fd2ec330 2672 if (flags & EF_ARM_APCS_26)
6c571f00 2673 fprintf (file, " [APCS-26]");
fc830a83 2674 else
6c571f00 2675 fprintf (file, " [APCS-32]");
9a5aca8c 2676
96a846ea
RE
2677 if (flags & EF_ARM_VFP_FLOAT)
2678 fprintf (file, _(" [VFP float format]"));
fde78edd
NC
2679 else if (flags & EF_ARM_MAVERICK_FLOAT)
2680 fprintf (file, _(" [Maverick float format]"));
96a846ea
RE
2681 else
2682 fprintf (file, _(" [FPA float format]"));
2683
fd2ec330 2684 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 2685 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 2686
fd2ec330 2687 if (flags & EF_ARM_PIC)
9b485d32 2688 fprintf (file, _(" [position independent]"));
fc830a83 2689
fd2ec330 2690 if (flags & EF_ARM_NEW_ABI)
9b485d32 2691 fprintf (file, _(" [new ABI]"));
9a5aca8c 2692
fd2ec330 2693 if (flags & EF_ARM_OLD_ABI)
9b485d32 2694 fprintf (file, _(" [old ABI]"));
9a5aca8c 2695
fd2ec330 2696 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 2697 fprintf (file, _(" [software FP]"));
9a5aca8c 2698
96a846ea
RE
2699 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
2700 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
fde78edd
NC
2701 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
2702 | EF_ARM_MAVERICK_FLOAT);
fc830a83 2703 break;
9a5aca8c 2704
fc830a83 2705 case EF_ARM_EABI_VER1:
9b485d32 2706 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 2707
fc830a83 2708 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 2709 fprintf (file, _(" [sorted symbol table]"));
fc830a83 2710 else
9b485d32 2711 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 2712
fc830a83
NC
2713 flags &= ~ EF_ARM_SYMSARESORTED;
2714 break;
9a5aca8c 2715
fd2ec330
PB
2716 case EF_ARM_EABI_VER2:
2717 fprintf (file, _(" [Version2 EABI]"));
2718
2719 if (flags & EF_ARM_SYMSARESORTED)
2720 fprintf (file, _(" [sorted symbol table]"));
2721 else
2722 fprintf (file, _(" [unsorted symbol table]"));
2723
2724 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2725 fprintf (file, _(" [dynamic symbols use segment index]"));
2726
2727 if (flags & EF_ARM_MAPSYMSFIRST)
2728 fprintf (file, _(" [mapping symbols precede others]"));
2729
99e4ae17 2730 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB
2731 | EF_ARM_MAPSYMSFIRST);
2732 break;
2733
d507cf36
PB
2734 case EF_ARM_EABI_VER3:
2735 fprintf (file, _(" [Version3 EABI]"));
2736
2737 if (flags & EF_ARM_BE8)
2738 fprintf (file, _(" [BE8]"));
2739
2740 if (flags & EF_ARM_LE8)
2741 fprintf (file, _(" [LE8]"));
2742
2743 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
2744 break;
2745
fc830a83 2746 default:
9b485d32 2747 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC
2748 break;
2749 }
252b5132 2750
fc830a83 2751 flags &= ~ EF_ARM_EABIMASK;
252b5132 2752
fc830a83 2753 if (flags & EF_ARM_RELEXEC)
9b485d32 2754 fprintf (file, _(" [relocatable executable]"));
252b5132 2755
fc830a83 2756 if (flags & EF_ARM_HASENTRY)
9b485d32 2757 fprintf (file, _(" [has entry point]"));
252b5132 2758
fc830a83
NC
2759 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2760
2761 if (flags)
9b485d32 2762 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 2763
252b5132
RH
2764 fputc ('\n', file);
2765
b34976b6 2766 return TRUE;
252b5132
RH
2767}
2768
2769static int
2770elf32_arm_get_symbol_type (elf_sym, type)
2771 Elf_Internal_Sym * elf_sym;
2772 int type;
2773{
2f0ca46a
NC
2774 switch (ELF_ST_TYPE (elf_sym->st_info))
2775 {
2776 case STT_ARM_TFUNC:
2777 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 2778
2f0ca46a
NC
2779 case STT_ARM_16BIT:
2780 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2781 This allows us to distinguish between data used by Thumb instructions
2782 and non-data (which is probably code) inside Thumb regions of an
2783 executable. */
2784 if (type != STT_OBJECT)
2785 return ELF_ST_TYPE (elf_sym->st_info);
2786 break;
9a5aca8c 2787
ce855c42
NC
2788 default:
2789 break;
2f0ca46a
NC
2790 }
2791
2792 return type;
252b5132 2793}
f21f3fe0 2794
252b5132 2795static asection *
1e2f5b6e
AM
2796elf32_arm_gc_mark_hook (sec, info, rel, h, sym)
2797 asection *sec;
5f771d47 2798 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH
2799 Elf_Internal_Rela *rel;
2800 struct elf_link_hash_entry *h;
2801 Elf_Internal_Sym *sym;
2802{
2803 if (h != NULL)
2804 {
2805 switch (ELF32_R_TYPE (rel->r_info))
2806 {
2807 case R_ARM_GNU_VTINHERIT:
2808 case R_ARM_GNU_VTENTRY:
2809 break;
2810
2811 default:
2812 switch (h->root.type)
2813 {
2814 case bfd_link_hash_defined:
2815 case bfd_link_hash_defweak:
2816 return h->root.u.def.section;
2817
2818 case bfd_link_hash_common:
2819 return h->root.u.c.p->section;
e049a0de
ILT
2820
2821 default:
2822 break;
252b5132
RH
2823 }
2824 }
2825 }
2826 else
1e2f5b6e 2827 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
9ad5cbcf 2828
252b5132
RH
2829 return NULL;
2830}
2831
780a67af
NC
2832/* Update the got entry reference counts for the section being removed. */
2833
b34976b6 2834static bfd_boolean
252b5132 2835elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT
2836 bfd *abfd ATTRIBUTE_UNUSED;
2837 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2838 asection *sec ATTRIBUTE_UNUSED;
2839 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2840{
5e681ec4
PB
2841 Elf_Internal_Shdr *symtab_hdr;
2842 struct elf_link_hash_entry **sym_hashes;
2843 bfd_signed_vma *local_got_refcounts;
2844 const Elf_Internal_Rela *rel, *relend;
2845 unsigned long r_symndx;
2846 struct elf_link_hash_entry *h;
2847
2848 elf_section_data (sec)->local_dynrel = NULL;
2849
2850 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2851 sym_hashes = elf_sym_hashes (abfd);
2852 local_got_refcounts = elf_local_got_refcounts (abfd);
2853
2854 relend = relocs + sec->reloc_count;
2855 for (rel = relocs; rel < relend; rel++)
2856 switch (ELF32_R_TYPE (rel->r_info))
2857 {
2858 case R_ARM_GOT32:
2859 r_symndx = ELF32_R_SYM (rel->r_info);
2860 if (r_symndx >= symtab_hdr->sh_info)
2861 {
2862 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2863 if (h->got.refcount > 0)
2864 h->got.refcount -= 1;
2865 }
2866 else if (local_got_refcounts != NULL)
2867 {
2868 if (local_got_refcounts[r_symndx] > 0)
2869 local_got_refcounts[r_symndx] -= 1;
2870 }
2871 break;
2872
2873 case R_ARM_ABS32:
2874 case R_ARM_REL32:
2875 case R_ARM_PC24:
7359ea65 2876 case R_ARM_PLT32:
5e681ec4
PB
2877 r_symndx = ELF32_R_SYM (rel->r_info);
2878 if (r_symndx >= symtab_hdr->sh_info)
2879 {
2880 struct elf32_arm_link_hash_entry *eh;
2881 struct elf32_arm_relocs_copied **pp;
2882 struct elf32_arm_relocs_copied *p;
2883
2884 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2885
7359ea65 2886 if (h->plt.refcount > 0)
5e681ec4
PB
2887 h->plt.refcount -= 1;
2888
7359ea65
DJ
2889 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
2890 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
2891 {
2892 eh = (struct elf32_arm_link_hash_entry *) h;
5e681ec4 2893
7359ea65
DJ
2894 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
2895 pp = &p->next)
2896 if (p->section == sec)
2897 {
2898 p->count -= 1;
2899 if (p->count == 0)
2900 *pp = p->next;
2901 break;
2902 }
2903 }
5e681ec4
PB
2904 }
2905 break;
2906
2907 default:
2908 break;
2909 }
2910
b34976b6 2911 return TRUE;
252b5132
RH
2912}
2913
780a67af
NC
2914/* Look through the relocs for a section during the first phase. */
2915
b34976b6 2916static bfd_boolean
252b5132 2917elf32_arm_check_relocs (abfd, info, sec, relocs)
b34976b6
AM
2918 bfd *abfd;
2919 struct bfd_link_info *info;
2920 asection *sec;
2921 const Elf_Internal_Rela *relocs;
252b5132 2922{
b34976b6
AM
2923 Elf_Internal_Shdr *symtab_hdr;
2924 struct elf_link_hash_entry **sym_hashes;
2925 struct elf_link_hash_entry **sym_hashes_end;
2926 const Elf_Internal_Rela *rel;
2927 const Elf_Internal_Rela *rel_end;
2928 bfd *dynobj;
5e681ec4 2929 asection *sreloc;
b34976b6 2930 bfd_vma *local_got_offsets;
5e681ec4 2931 struct elf32_arm_link_hash_table *htab;
9a5aca8c 2932
1049f94e 2933 if (info->relocatable)
b34976b6 2934 return TRUE;
9a5aca8c 2935
5e681ec4
PB
2936 htab = elf32_arm_hash_table (info);
2937 sreloc = NULL;
9a5aca8c 2938
252b5132
RH
2939 dynobj = elf_hash_table (info)->dynobj;
2940 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2941
252b5132
RH
2942 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2943 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC
2944 sym_hashes_end = sym_hashes
2945 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2946
252b5132
RH
2947 if (!elf_bad_symtab (abfd))
2948 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 2949
252b5132
RH
2950 rel_end = relocs + sec->reloc_count;
2951 for (rel = relocs; rel < rel_end; rel++)
2952 {
2953 struct elf_link_hash_entry *h;
2954 unsigned long r_symndx;
9a5aca8c 2955
252b5132
RH
2956 r_symndx = ELF32_R_SYM (rel->r_info);
2957 if (r_symndx < symtab_hdr->sh_info)
2958 h = NULL;
2959 else
2960 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 2961
252b5132
RH
2962 switch (ELF32_R_TYPE (rel->r_info))
2963 {
5e681ec4
PB
2964 case R_ARM_GOT32:
2965 /* This symbol requires a global offset table entry. */
252b5132
RH
2966 if (h != NULL)
2967 {
5e681ec4 2968 h->got.refcount++;
252b5132
RH
2969 }
2970 else
2971 {
5e681ec4
PB
2972 bfd_signed_vma *local_got_refcounts;
2973
2974 /* This is a global offset table entry for a local symbol. */
2975 local_got_refcounts = elf_local_got_refcounts (abfd);
2976 if (local_got_refcounts == NULL)
252b5132 2977 {
dc810e39 2978 bfd_size_type size;
252b5132 2979
dc810e39 2980 size = symtab_hdr->sh_info;
5e681ec4
PB
2981 size *= (sizeof (bfd_signed_vma) + sizeof(char));
2982 local_got_refcounts = ((bfd_signed_vma *)
2983 bfd_zalloc (abfd, size));
2984 if (local_got_refcounts == NULL)
b34976b6 2985 return FALSE;
5e681ec4 2986 elf_local_got_refcounts (abfd) = local_got_refcounts;
252b5132 2987 }
5e681ec4 2988 local_got_refcounts[r_symndx] += 1;
252b5132 2989 }
252b5132
RH
2990 break;
2991
5e681ec4
PB
2992 case R_ARM_GOTOFF:
2993 case R_ARM_GOTPC:
2994 if (htab->sgot == NULL)
2995 {
2996 if (htab->root.dynobj == NULL)
2997 htab->root.dynobj = abfd;
2998 if (!create_got_section (htab->root.dynobj, info))
2999 return FALSE;
3000 }
252b5132
RH
3001 break;
3002
3003 case R_ARM_ABS32:
3004 case R_ARM_REL32:
3005 case R_ARM_PC24:
7359ea65
DJ
3006 case R_ARM_PLT32:
3007 if (h != NULL)
5e681ec4
PB
3008 {
3009 /* If this reloc is in a read-only section, we might
3010 need a copy reloc. We can't check reliably at this
3011 stage whether the section is read-only, as input
3012 sections have not yet been mapped to output sections.
3013 Tentatively set the flag for now, and correct in
3014 adjust_dynamic_symbol. */
7359ea65
DJ
3015 if (!info->shared)
3016 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3017
5e681ec4 3018 /* We may need a .plt entry if the function this reloc
c84cd8ee
DJ
3019 refers to is in a different object. We can't tell for
3020 sure yet, because something later might force the
3021 symbol local. */
7359ea65
DJ
3022 if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24
3023 || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32)
4f199be3
DJ
3024 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3025
3026 /* If we create a PLT entry, this relocation will reference
3027 it, even if it's an ABS32 relocation. */
3028 h->plt.refcount += 1;
5e681ec4
PB
3029 }
3030
252b5132
RH
3031 /* If we are creating a shared library, and this is a reloc
3032 against a global symbol, or a non PC relative reloc
3033 against a local symbol, then we need to copy the reloc
3034 into the shared library. However, if we are linking with
3035 -Bsymbolic, we do not need to copy a reloc against a
3036 global symbol which is defined in an object we are
3037 including in the link (i.e., DEF_REGULAR is set). At
3038 this point we have not seen all the input files, so it is
3039 possible that DEF_REGULAR is not set now but will be set
3040 later (it is never cleared). We account for that
3041 possibility below by storing information in the
5e681ec4 3042 relocs_copied field of the hash table entry. */
252b5132 3043 if (info->shared
5e681ec4 3044 && (sec->flags & SEC_ALLOC) != 0
7359ea65 3045 && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
955af222
PB
3046 && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32
3047 && ELF32_R_TYPE (rel->r_info) != R_ARM_REL32)
5e681ec4
PB
3048 || (h != NULL
3049 && (! info->symbolic
3050 || (h->elf_link_hash_flags
3051 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
252b5132 3052 {
5e681ec4
PB
3053 struct elf32_arm_relocs_copied *p, **head;
3054
252b5132
RH
3055 /* When creating a shared object, we must copy these
3056 reloc types into the output file. We create a reloc
3057 section in dynobj and make room for this reloc. */
3058 if (sreloc == NULL)
3059 {
3060 const char * name;
3061
3062 name = (bfd_elf_string_from_elf_section
3063 (abfd,
3064 elf_elfheader (abfd)->e_shstrndx,
3065 elf_section_data (sec)->rel_hdr.sh_name));
3066 if (name == NULL)
b34976b6 3067 return FALSE;
252b5132
RH
3068
3069 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 3070 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH
3071 name + 4) == 0);
3072
3073 sreloc = bfd_get_section_by_name (dynobj, name);
3074 if (sreloc == NULL)
3075 {
3076 flagword flags;
3077
3078 sreloc = bfd_make_section (dynobj, name);
3079 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3080 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3081 if ((sec->flags & SEC_ALLOC) != 0)
3082 flags |= SEC_ALLOC | SEC_LOAD;
3083 if (sreloc == NULL
3084 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3085 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 3086 return FALSE;
252b5132 3087 }
5e681ec4
PB
3088
3089 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH
3090 }
3091
5e681ec4
PB
3092 /* If this is a global symbol, we count the number of
3093 relocations we need for this symbol. */
3094 if (h != NULL)
252b5132 3095 {
5e681ec4
PB
3096 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
3097 }
3098 else
3099 {
3100 /* Track dynamic relocs needed for local syms too.
3101 We really need local syms available to do this
3102 easily. Oh well. */
3103
3104 asection *s;
3105 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3106 sec, r_symndx);
3107 if (s == NULL)
3108 return FALSE;
3109
3110 head = ((struct elf32_arm_relocs_copied **)
3111 &elf_section_data (s)->local_dynrel);
3112 }
3113
3114 p = *head;
3115 if (p == NULL || p->section != sec)
3116 {
3117 bfd_size_type amt = sizeof *p;
3118 p = bfd_alloc (htab->root.dynobj, amt);
252b5132 3119 if (p == NULL)
5e681ec4
PB
3120 return FALSE;
3121 p->next = *head;
3122 *head = p;
3123 p->section = sec;
3124 p->count = 0;
252b5132 3125 }
5e681ec4 3126
7359ea65
DJ
3127 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
3128 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
3129 p->count += 1;
252b5132
RH
3130 }
3131 break;
3132
3133 /* This relocation describes the C++ object vtable hierarchy.
3134 Reconstruct it for later use during GC. */
3135 case R_ARM_GNU_VTINHERIT:
c152c796 3136 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 3137 return FALSE;
252b5132 3138 break;
9a5aca8c 3139
252b5132
RH
3140 /* This relocation describes which C++ vtable entries are actually
3141 used. Record for later use during GC. */
3142 case R_ARM_GNU_VTENTRY:
c152c796 3143 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 3144 return FALSE;
252b5132
RH
3145 break;
3146 }
3147 }
f21f3fe0 3148
b34976b6 3149 return TRUE;
252b5132
RH
3150}
3151
252b5132
RH
3152/* Find the nearest line to a particular section and offset, for error
3153 reporting. This code is a duplicate of the code in elf.c, except
9b485d32 3154 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
252b5132 3155
b34976b6 3156static bfd_boolean
252b5132
RH
3157elf32_arm_find_nearest_line
3158 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
b34976b6
AM
3159 bfd *abfd;
3160 asection *section;
3161 asymbol **symbols;
3162 bfd_vma offset;
3163 const char **filename_ptr;
3164 const char **functionname_ptr;
3165 unsigned int *line_ptr;
252b5132 3166{
b34976b6
AM
3167 bfd_boolean found;
3168 const char *filename;
3169 asymbol *func;
3170 bfd_vma low_func;
3171 asymbol **p;
252b5132
RH
3172
3173 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 3174 filename_ptr, functionname_ptr,
857ec808
NC
3175 line_ptr, 0,
3176 &elf_tdata (abfd)->dwarf2_find_line_info))
b34976b6 3177 return TRUE;
252b5132
RH
3178
3179 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
3180 &found, filename_ptr,
3181 functionname_ptr, line_ptr,
3182 &elf_tdata (abfd)->line_info))
b34976b6 3183 return FALSE;
f21f3fe0 3184
252b5132 3185 if (found)
b34976b6 3186 return TRUE;
252b5132
RH
3187
3188 if (symbols == NULL)
b34976b6 3189 return FALSE;
252b5132
RH
3190
3191 filename = NULL;
3192 func = NULL;
3193 low_func = 0;
3194
3195 for (p = symbols; *p != NULL; p++)
3196 {
3197 elf_symbol_type *q;
3198
3199 q = (elf_symbol_type *) *p;
3200
3201 if (bfd_get_section (&q->symbol) != section)
3202 continue;
3203
3204 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
3205 {
3206 default:
3207 break;
3208 case STT_FILE:
3209 filename = bfd_asymbol_name (&q->symbol);
3210 break;
3211 case STT_NOTYPE:
3212 case STT_FUNC:
3213 case STT_ARM_TFUNC:
3214 if (q->symbol.section == section
3215 && q->symbol.value >= low_func
3216 && q->symbol.value <= offset)
3217 {
3218 func = (asymbol *) q;
3219 low_func = q->symbol.value;
3220 }
3221 break;
3222 }
3223 }
3224
3225 if (func == NULL)
b34976b6 3226 return FALSE;
252b5132
RH
3227
3228 *filename_ptr = filename;
3229 *functionname_ptr = bfd_asymbol_name (func);
3230 *line_ptr = 0;
f21f3fe0 3231
b34976b6 3232 return TRUE;
252b5132
RH
3233}
3234
3235/* Adjust a symbol defined by a dynamic object and referenced by a
3236 regular object. The current definition is in some section of the
3237 dynamic object, but we're not including those sections. We have to
3238 change the definition to something the rest of the link can
3239 understand. */
3240
b34976b6 3241static bfd_boolean
252b5132
RH
3242elf32_arm_adjust_dynamic_symbol (info, h)
3243 struct bfd_link_info * info;
3244 struct elf_link_hash_entry * h;
3245{
3246 bfd * dynobj;
3247 asection * s;
3248 unsigned int power_of_two;
3249
3250 dynobj = elf_hash_table (info)->dynobj;
3251
3252 /* Make sure we know what is going on here. */
3253 BFD_ASSERT (dynobj != NULL
3254 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
3255 || h->weakdef != NULL
3256 || ((h->elf_link_hash_flags
3257 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3258 && (h->elf_link_hash_flags
3259 & ELF_LINK_HASH_REF_REGULAR) != 0
3260 && (h->elf_link_hash_flags
3261 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
3262
3263 /* If this is a function, put it in the procedure linkage table. We
3264 will fill in the contents of the procedure linkage table later,
3265 when we know the address of the .got section. */
24a1ba0f 3266 if (h->type == STT_FUNC
252b5132
RH
3267 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3268 {
5e681ec4
PB
3269 if (h->plt.refcount <= 0
3270 || SYMBOL_CALLS_LOCAL (info, h)
3271 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3272 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH
3273 {
3274 /* This case can occur if we saw a PLT32 reloc in an input
5e681ec4
PB
3275 file, but the symbol was never referred to by a dynamic
3276 object, or if all references were garbage collected. In
3277 such a case, we don't actually need to build a procedure
3278 linkage table, and we can just do a PC24 reloc instead. */
3279 h->plt.offset = (bfd_vma) -1;
9d7404b7 3280 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
252b5132
RH
3281 }
3282
b34976b6 3283 return TRUE;
252b5132 3284 }
5e681ec4
PB
3285 else
3286 /* It's possible that we incorrectly decided a .plt reloc was
3287 needed for an R_ARM_PC24 reloc to a non-function sym in
3288 check_relocs. We can't decide accurately between function and
3289 non-function syms in check-relocs; Objects loaded later in
3290 the link may change h->type. So fix it now. */
3291 h->plt.offset = (bfd_vma) -1;
252b5132
RH
3292
3293 /* If this is a weak symbol, and there is a real definition, the
3294 processor independent code will have arranged for us to see the
3295 real definition first, and we can just use the same value. */
3296 if (h->weakdef != NULL)
3297 {
3298 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3299 || h->weakdef->root.type == bfd_link_hash_defweak);
3300 h->root.u.def.section = h->weakdef->root.u.def.section;
3301 h->root.u.def.value = h->weakdef->root.u.def.value;
b34976b6 3302 return TRUE;
252b5132
RH
3303 }
3304
3305 /* This is a reference to a symbol defined by a dynamic object which
3306 is not a function. */
3307
3308 /* If we are creating a shared library, we must presume that the
3309 only references to the symbol are via the global offset table.
3310 For such cases we need not do anything here; the relocations will
3311 be handled correctly by relocate_section. */
3312 if (info->shared)
b34976b6 3313 return TRUE;
252b5132
RH
3314
3315 /* We must allocate the symbol in our .dynbss section, which will
3316 become part of the .bss section of the executable. There will be
3317 an entry for this symbol in the .dynsym section. The dynamic
3318 object will contain position independent code, so all references
3319 from the dynamic object to this symbol will go through the global
3320 offset table. The dynamic linker will use the .dynsym entry to
3321 determine the address it must put in the global offset table, so
3322 both the dynamic object and the regular object will refer to the
3323 same memory location for the variable. */
252b5132
RH
3324 s = bfd_get_section_by_name (dynobj, ".dynbss");
3325 BFD_ASSERT (s != NULL);
3326
3327 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
3328 copy the initial value out of the dynamic object and into the
3329 runtime process image. We need to remember the offset into the
3330 .rel.bss section we are going to use. */
3331 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3332 {
3333 asection *srel;
3334
3335 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
3336 BFD_ASSERT (srel != NULL);
3337 srel->_raw_size += sizeof (Elf32_External_Rel);
3338 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3339 }
3340
3341 /* We need to figure out the alignment required for this symbol. I
3342 have no idea how ELF linkers handle this. */
3343 power_of_two = bfd_log2 (h->size);
3344 if (power_of_two > 3)
3345 power_of_two = 3;
3346
3347 /* Apply the required alignment. */
3348 s->_raw_size = BFD_ALIGN (s->_raw_size,
3349 (bfd_size_type) (1 << power_of_two));
3350 if (power_of_two > bfd_get_section_alignment (dynobj, s))
3351 {
3352 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
b34976b6 3353 return FALSE;
252b5132
RH
3354 }
3355
3356 /* Define the symbol as being at this point in the section. */
3357 h->root.u.def.section = s;
3358 h->root.u.def.value = s->_raw_size;
3359
3360 /* Increment the section size to make room for the symbol. */
3361 s->_raw_size += h->size;
3362
b34976b6 3363 return TRUE;
252b5132
RH
3364}
3365
5e681ec4
PB
3366/* Allocate space in .plt, .got and associated reloc sections for
3367 dynamic relocs. */
3368
3369static bfd_boolean
3370allocate_dynrelocs (h, inf)
3371 struct elf_link_hash_entry *h;
3372 PTR inf;
3373{
3374 struct bfd_link_info *info;
3375 struct elf32_arm_link_hash_table *htab;
3376 struct elf32_arm_link_hash_entry *eh;
3377 struct elf32_arm_relocs_copied *p;
3378
3379 if (h->root.type == bfd_link_hash_indirect)
3380 return TRUE;
3381
3382 if (h->root.type == bfd_link_hash_warning)
3383 /* When warning symbols are created, they **replace** the "real"
3384 entry in the hash table, thus we never get to see the real
3385 symbol in a hash traversal. So look at it now. */
3386 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3387
3388 info = (struct bfd_link_info *) inf;
3389 htab = elf32_arm_hash_table (info);
3390
3391 if (htab->root.dynamic_sections_created
3392 && h->plt.refcount > 0)
3393 {
3394 /* Make sure this symbol is output as a dynamic symbol.
3395 Undefined weak syms won't yet be marked as dynamic. */
3396 if (h->dynindx == -1
3397 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3398 {
c152c796 3399 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB
3400 return FALSE;
3401 }
3402
3403 if (info->shared
7359ea65 3404 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5e681ec4
PB
3405 {
3406 asection *s = htab->splt;
3407
3408 /* If this is the first .plt entry, make room for the special
3409 first entry. */
3410 if (s->_raw_size == 0)
3411 s->_raw_size += PLT_HEADER_SIZE;
3412
3413 h->plt.offset = s->_raw_size;
3414
3415 /* If this symbol is not defined in a regular file, and we are
3416 not generating a shared library, then set the symbol to this
3417 location in the .plt. This is required to make function
3418 pointers compare as equal between the normal executable and
3419 the shared library. */
3420 if (! info->shared
3421 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3422 {
3423 h->root.u.def.section = s;
3424 h->root.u.def.value = h->plt.offset;
3425 }
3426
3427 /* Make room for this entry. */
3428 s->_raw_size += PLT_ENTRY_SIZE;
3429
3430 /* We also need to make an entry in the .got.plt section, which
3431 will be placed in the .got section by the linker script. */
3432 htab->sgotplt->_raw_size += 4;
3433
3434 /* We also need to make an entry in the .rel.plt section. */
3435 htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
3436 }
3437 else
3438 {
3439 h->plt.offset = (bfd_vma) -1;
3440 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3441 }
3442 }
3443 else
3444 {
3445 h->plt.offset = (bfd_vma) -1;
3446 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3447 }
3448
3449 if (h->got.refcount > 0)
3450 {
3451 asection *s;
3452 bfd_boolean dyn;
3453
3454 /* Make sure this symbol is output as a dynamic symbol.
3455 Undefined weak syms won't yet be marked as dynamic. */
3456 if (h->dynindx == -1
3457 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3458 {
c152c796 3459 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB
3460 return FALSE;
3461 }
3462
3463 s = htab->sgot;
3464 h->got.offset = s->_raw_size;
3465 s->_raw_size += 4;
3466 dyn = htab->root.dynamic_sections_created;
3467 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3468 || h->root.type != bfd_link_hash_undefweak)
3469 && (info->shared
3470 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3471 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
3472 }
3473 else
3474 h->got.offset = (bfd_vma) -1;
3475
3476 eh = (struct elf32_arm_link_hash_entry *) h;
3477 if (eh->relocs_copied == NULL)
3478 return TRUE;
3479
3480 /* In the shared -Bsymbolic case, discard space allocated for
3481 dynamic pc-relative relocs against symbols which turn out to be
3482 defined in regular objects. For the normal shared case, discard
3483 space for pc-relative relocs that have become local due to symbol
3484 visibility changes. */
3485
3486 if (info->shared)
3487 {
7359ea65
DJ
3488 /* Discard relocs on undefined weak syms with non-default
3489 visibility. */
5e681ec4
PB
3490 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3491 && h->root.type == bfd_link_hash_undefweak)
3492 eh->relocs_copied = NULL;
3493 }
3494 else
3495 {
3496 /* For the non-shared case, discard space for relocs against
3497 symbols which turn out to need copy relocs or are not
3498 dynamic. */
3499
3500 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3501 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3502 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3503 || (htab->root.dynamic_sections_created
3504 && (h->root.type == bfd_link_hash_undefweak
3505 || h->root.type == bfd_link_hash_undefined))))
3506 {
3507 /* Make sure this symbol is output as a dynamic symbol.
3508 Undefined weak syms won't yet be marked as dynamic. */
3509 if (h->dynindx == -1
3510 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3511 {
c152c796 3512 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB
3513 return FALSE;
3514 }
3515
3516 /* If that succeeded, we know we'll be keeping all the
3517 relocs. */
3518 if (h->dynindx != -1)
3519 goto keep;
3520 }
3521
3522 eh->relocs_copied = NULL;
3523
3524 keep: ;
3525 }
3526
3527 /* Finally, allocate space. */
3528 for (p = eh->relocs_copied; p != NULL; p = p->next)
3529 {
3530 asection *sreloc = elf_section_data (p->section)->sreloc;
3531 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
3532 }
3533
3534 return TRUE;
3535}
3536
252b5132
RH
3537/* Set the sizes of the dynamic sections. */
3538
b34976b6 3539static bfd_boolean
252b5132 3540elf32_arm_size_dynamic_sections (output_bfd, info)
99e4ae17 3541 bfd * output_bfd ATTRIBUTE_UNUSED;
252b5132
RH
3542 struct bfd_link_info * info;
3543{
3544 bfd * dynobj;
3545 asection * s;
b34976b6
AM
3546 bfd_boolean plt;
3547 bfd_boolean relocs;
5e681ec4
PB
3548 bfd *ibfd;
3549 struct elf32_arm_link_hash_table *htab;
252b5132 3550
5e681ec4 3551 htab = elf32_arm_hash_table (info);
252b5132
RH
3552 dynobj = elf_hash_table (info)->dynobj;
3553 BFD_ASSERT (dynobj != NULL);
3554
3555 if (elf_hash_table (info)->dynamic_sections_created)
3556 {
3557 /* Set the contents of the .interp section to the interpreter. */
893c4fe2 3558 if (info->executable)
252b5132
RH
3559 {
3560 s = bfd_get_section_by_name (dynobj, ".interp");
3561 BFD_ASSERT (s != NULL);
3562 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3563 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3564 }
3565 }
5e681ec4
PB
3566
3567 /* Set up .got offsets for local syms, and space for local dynamic
3568 relocs. */
3569 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
252b5132 3570 {
5e681ec4
PB
3571 bfd_signed_vma *local_got;
3572 bfd_signed_vma *end_local_got;
3573 char *local_tls_type;
3574 bfd_size_type locsymcount;
3575 Elf_Internal_Shdr *symtab_hdr;
3576 asection *srel;
3577
3578 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3579 continue;
3580
3581 for (s = ibfd->sections; s != NULL; s = s->next)
3582 {
3583 struct elf32_arm_relocs_copied *p;
3584
3585 for (p = *((struct elf32_arm_relocs_copied **)
3586 &elf_section_data (s)->local_dynrel);
3587 p != NULL;
3588 p = p->next)
3589 {
3590 if (!bfd_is_abs_section (p->section)
3591 && bfd_is_abs_section (p->section->output_section))
3592 {
3593 /* Input section has been discarded, either because
3594 it is a copy of a linkonce section or due to
3595 linker script /DISCARD/, so we'll be discarding
3596 the relocs too. */
3597 }
3598 else if (p->count != 0)
3599 {
3600 srel = elf_section_data (p->section)->sreloc;
3601 srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
3602 if ((p->section->output_section->flags & SEC_READONLY) != 0)
3603 info->flags |= DF_TEXTREL;
3604 }
3605 }
3606 }
3607
3608 local_got = elf_local_got_refcounts (ibfd);
3609 if (!local_got)
3610 continue;
3611
3612 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3613 locsymcount = symtab_hdr->sh_info;
3614 end_local_got = local_got + locsymcount;
3615 s = htab->sgot;
3616 srel = htab->srelgot;
3617 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
3618 {
3619 if (*local_got > 0)
3620 {
3621 *local_got = s->_raw_size;
3622 s->_raw_size += 4;
3623 if (info->shared)
3624 srel->_raw_size += sizeof (Elf32_External_Rel);
3625 }
3626 else
3627 *local_got = (bfd_vma) -1;
3628 }
252b5132
RH
3629 }
3630
5e681ec4
PB
3631 /* Allocate global sym .plt and .got entries, and space for global
3632 sym dynamic relocs. */
3633 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (PTR) info);
252b5132
RH
3634
3635 /* The check_relocs and adjust_dynamic_symbol entry points have
3636 determined the sizes of the various dynamic sections. Allocate
3637 memory for them. */
b34976b6
AM
3638 plt = FALSE;
3639 relocs = FALSE;
252b5132
RH
3640 for (s = dynobj->sections; s != NULL; s = s->next)
3641 {
3642 const char * name;
b34976b6 3643 bfd_boolean strip;
252b5132
RH
3644
3645 if ((s->flags & SEC_LINKER_CREATED) == 0)
3646 continue;
3647
3648 /* It's OK to base decisions on the section name, because none
3649 of the dynobj section names depend upon the input files. */
3650 name = bfd_get_section_name (dynobj, s);
3651
b34976b6 3652 strip = FALSE;
252b5132 3653
24a1ba0f 3654 if (strcmp (name, ".plt") == 0)
252b5132
RH
3655 {
3656 if (s->_raw_size == 0)
3657 {
3658 /* Strip this section if we don't need it; see the
3659 comment below. */
b34976b6 3660 strip = TRUE;
252b5132
RH
3661 }
3662 else
3663 {
3664 /* Remember whether there is a PLT. */
b34976b6 3665 plt = TRUE;
252b5132
RH
3666 }
3667 }
3668 else if (strncmp (name, ".rel", 4) == 0)
3669 {
3670 if (s->_raw_size == 0)
3671 {
3672 /* If we don't need this section, strip it from the
3673 output file. This is mostly to handle .rel.bss and
3674 .rel.plt. We must create both sections in
3675 create_dynamic_sections, because they must be created
3676 before the linker maps input sections to output
3677 sections. The linker does that before
3678 adjust_dynamic_symbol is called, and it is that
3679 function which decides whether anything needs to go
3680 into these sections. */
b34976b6 3681 strip = TRUE;
252b5132
RH
3682 }
3683 else
3684 {
252b5132
RH
3685 /* Remember whether there are any reloc sections other
3686 than .rel.plt. */
3687 if (strcmp (name, ".rel.plt") != 0)
b34976b6 3688 relocs = TRUE;
252b5132
RH
3689
3690 /* We use the reloc_count field as a counter if we need
3691 to copy relocs into the output file. */
3692 s->reloc_count = 0;
3693 }
3694 }
3695 else if (strncmp (name, ".got", 4) != 0)
3696 {
3697 /* It's not one of our sections, so don't allocate space. */
3698 continue;
3699 }
3700
3701 if (strip)
3702 {
52585bb8 3703 _bfd_strip_section_from_output (info, s);
252b5132
RH
3704 continue;
3705 }
3706
3707 /* Allocate memory for the section contents. */
3708 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3709 if (s->contents == NULL && s->_raw_size != 0)
b34976b6 3710 return FALSE;
252b5132
RH
3711 }
3712
3713 if (elf_hash_table (info)->dynamic_sections_created)
3714 {
3715 /* Add some entries to the .dynamic section. We fill in the
3716 values later, in elf32_arm_finish_dynamic_sections, but we
3717 must add the entries now so that we get the correct size for
3718 the .dynamic section. The DT_DEBUG entry is filled in by the
3719 dynamic linker and used by the debugger. */
dc810e39 3720#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3721 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39
AM
3722
3723 if (!info->shared)
252b5132 3724 {
dc810e39 3725 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3726 return FALSE;
252b5132
RH
3727 }
3728
3729 if (plt)
3730 {
dc810e39
AM
3731 if ( !add_dynamic_entry (DT_PLTGOT, 0)
3732 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3733 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3734 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3735 return FALSE;
252b5132
RH
3736 }
3737
3738 if (relocs)
3739 {
dc810e39
AM
3740 if ( !add_dynamic_entry (DT_REL, 0)
3741 || !add_dynamic_entry (DT_RELSZ, 0)
3742 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 3743 return FALSE;
252b5132
RH
3744 }
3745
99e4ae17 3746 if ((info->flags & DF_TEXTREL) != 0)
252b5132 3747 {
dc810e39 3748 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3749 return FALSE;
d6cf2879 3750 info->flags |= DF_TEXTREL;
252b5132
RH
3751 }
3752 }
dc810e39 3753#undef add_synamic_entry
252b5132 3754
b34976b6 3755 return TRUE;
252b5132
RH
3756}
3757
252b5132
RH
3758/* Finish up dynamic symbol handling. We set the contents of various
3759 dynamic sections here. */
3760
b34976b6 3761static bfd_boolean
252b5132
RH
3762elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3763 bfd * output_bfd;
3764 struct bfd_link_info * info;
3765 struct elf_link_hash_entry * h;
3766 Elf_Internal_Sym * sym;
3767{
3768 bfd * dynobj;
3769
3770 dynobj = elf_hash_table (info)->dynobj;
3771
3772 if (h->plt.offset != (bfd_vma) -1)
3773 {
3774 asection * splt;
3775 asection * sgot;
3776 asection * srel;
24a1ba0f
NC
3777 bfd_vma plt_index;
3778 bfd_vma got_offset;
947216bf
AM
3779 Elf_Internal_Rela rel;
3780 bfd_byte *loc;
5e681ec4 3781 bfd_vma got_displacement;
252b5132
RH
3782
3783 /* This symbol has an entry in the procedure linkage table. Set
3784 it up. */
3785
3786 BFD_ASSERT (h->dynindx != -1);
3787
3788 splt = bfd_get_section_by_name (dynobj, ".plt");
3789 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3790 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
24a1ba0f 3791 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
252b5132 3792
24a1ba0f
NC
3793 /* Get the index in the procedure linkage table which
3794 corresponds to this symbol. This is the index of this symbol
3795 in all the symbols for which we are making plt entries. The
3796 first entry in the procedure linkage table is reserved. */
5e681ec4 3797 plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
252b5132 3798
24a1ba0f
NC
3799 /* Get the offset into the .got table of the entry that
3800 corresponds to this function. Each .got entry is 4 bytes.
3801 The first three are reserved. */
3802 got_offset = (plt_index + 3) * 4;
252b5132 3803
5e681ec4
PB
3804 /* Calculate the displacement between the PLT slot and the
3805 entry in the GOT. */
3806 got_displacement = (sgot->output_section->vma
3807 + sgot->output_offset
3808 + got_offset
3809 - splt->output_section->vma
3810 - splt->output_offset
3811 - h->plt.offset
3812 - 8);
3813
3814 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
3815
252b5132 3816 /* Fill in the entry in the procedure linkage table. */
5e681ec4 3817 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
24a1ba0f 3818 splt->contents + h->plt.offset + 0);
5e681ec4 3819 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
24a1ba0f 3820 splt->contents + h->plt.offset + 4);
5e681ec4 3821 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
24a1ba0f 3822 splt->contents + h->plt.offset + 8);
5e681ec4
PB
3823#ifdef FOUR_WORD_PLT
3824 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
3825 splt->contents + h->plt.offset + 12);
3826#endif
252b5132 3827
24a1ba0f
NC
3828 /* Fill in the entry in the global offset table. */
3829 bfd_put_32 (output_bfd,
3830 (splt->output_section->vma
3831 + splt->output_offset),
3832 sgot->contents + got_offset);
5e681ec4 3833
252b5132
RH
3834 /* Fill in the entry in the .rel.plt section. */
3835 rel.r_offset = (sgot->output_section->vma
3836 + sgot->output_offset
24a1ba0f 3837 + got_offset);
252b5132 3838 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
947216bf
AM
3839 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
3840 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH
3841
3842 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3843 {
3844 /* Mark the symbol as undefined, rather than as defined in
3845 the .plt section. Leave the value alone. */
3846 sym->st_shndx = SHN_UNDEF;
d982ba73
PB
3847 /* If the symbol is weak, we do need to clear the value.
3848 Otherwise, the PLT entry would provide a definition for
3849 the symbol even if the symbol wasn't defined anywhere,
3850 and so the symbol would never be NULL. */
3851 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3852 == 0)
3853 sym->st_value = 0;
252b5132
RH
3854 }
3855 }
3856
3857 if (h->got.offset != (bfd_vma) -1)
3858 {
3859 asection * sgot;
3860 asection * srel;
947216bf
AM
3861 Elf_Internal_Rela rel;
3862 bfd_byte *loc;
252b5132
RH
3863
3864 /* This symbol has an entry in the global offset table. Set it
3865 up. */
252b5132
RH
3866 sgot = bfd_get_section_by_name (dynobj, ".got");
3867 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3868 BFD_ASSERT (sgot != NULL && srel != NULL);
3869
3870 rel.r_offset = (sgot->output_section->vma
3871 + sgot->output_offset
dc810e39 3872 + (h->got.offset &~ (bfd_vma) 1));
252b5132 3873
5e681ec4
PB
3874 /* If this is a static link, or it is a -Bsymbolic link and the
3875 symbol is defined locally or was forced to be local because
3876 of a version file, we just want to emit a RELATIVE reloc.
3877 The entry in the global offset table will already have been
3878 initialized in the relocate_section function. */
252b5132 3879 if (info->shared
5e681ec4
PB
3880 && SYMBOL_REFERENCES_LOCAL (info, h))
3881 {
3882 BFD_ASSERT((h->got.offset & 1) != 0);
3883 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3884 }
252b5132
RH
3885 else
3886 {
5e681ec4 3887 BFD_ASSERT((h->got.offset & 1) == 0);
252b5132
RH
3888 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3889 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3890 }
3891
947216bf
AM
3892 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
3893 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH
3894 }
3895
3896 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3897 {
3898 asection * s;
947216bf
AM
3899 Elf_Internal_Rela rel;
3900 bfd_byte *loc;
252b5132
RH
3901
3902 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH
3903 BFD_ASSERT (h->dynindx != -1
3904 && (h->root.type == bfd_link_hash_defined
3905 || h->root.type == bfd_link_hash_defweak));
3906
3907 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3908 ".rel.bss");
3909 BFD_ASSERT (s != NULL);
3910
3911 rel.r_offset = (h->root.u.def.value
3912 + h->root.u.def.section->output_section->vma
3913 + h->root.u.def.section->output_offset);
3914 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
947216bf
AM
3915 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
3916 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH
3917 }
3918
3919 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3920 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3921 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3922 sym->st_shndx = SHN_ABS;
3923
b34976b6 3924 return TRUE;
252b5132
RH
3925}
3926
3927/* Finish up the dynamic sections. */
3928
b34976b6 3929static bfd_boolean
252b5132
RH
3930elf32_arm_finish_dynamic_sections (output_bfd, info)
3931 bfd * output_bfd;
3932 struct bfd_link_info * info;
3933{
3934 bfd * dynobj;
3935 asection * sgot;
3936 asection * sdyn;
3937
3938 dynobj = elf_hash_table (info)->dynobj;
3939
3940 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3941 BFD_ASSERT (sgot != NULL);
3942 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3943
3944 if (elf_hash_table (info)->dynamic_sections_created)
3945 {
3946 asection *splt;
3947 Elf32_External_Dyn *dyncon, *dynconend;
3948
3949 splt = bfd_get_section_by_name (dynobj, ".plt");
24a1ba0f 3950 BFD_ASSERT (splt != NULL && sdyn != NULL);
252b5132
RH
3951
3952 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3953 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
9b485d32 3954
252b5132
RH
3955 for (; dyncon < dynconend; dyncon++)
3956 {
3957 Elf_Internal_Dyn dyn;
3958 const char * name;
3959 asection * s;
3960
3961 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3962
3963 switch (dyn.d_tag)
3964 {
3965 default:
3966 break;
3967
3968 case DT_PLTGOT:
3969 name = ".got";
3970 goto get_vma;
3971 case DT_JMPREL:
3972 name = ".rel.plt";
3973 get_vma:
3974 s = bfd_get_section_by_name (output_bfd, name);
3975 BFD_ASSERT (s != NULL);
3976 dyn.d_un.d_ptr = s->vma;
3977 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3978 break;
3979
3980 case DT_PLTRELSZ:
3981 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3982 BFD_ASSERT (s != NULL);
3983 if (s->_cooked_size != 0)
3984 dyn.d_un.d_val = s->_cooked_size;
3985 else
3986 dyn.d_un.d_val = s->_raw_size;
3987 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3988 break;
3989
3990 case DT_RELSZ:
3991 /* My reading of the SVR4 ABI indicates that the
3992 procedure linkage table relocs (DT_JMPREL) should be
3993 included in the overall relocs (DT_REL). This is
3994 what Solaris does. However, UnixWare can not handle
3995 that case. Therefore, we override the DT_RELSZ entry
3996 here to make it not include the JMPREL relocs. Since
3997 the linker script arranges for .rel.plt to follow all
3998 other relocation sections, we don't have to worry
3999 about changing the DT_REL entry. */
4000 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
4001 if (s != NULL)
4002 {
4003 if (s->_cooked_size != 0)
4004 dyn.d_un.d_val -= s->_cooked_size;
4005 else
4006 dyn.d_un.d_val -= s->_raw_size;
4007 }
4008 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4009 break;
88f7bcd5
NC
4010
4011 /* Set the bottom bit of DT_INIT/FINI if the
4012 corresponding function is Thumb. */
4013 case DT_INIT:
4014 name = info->init_function;
4015 goto get_sym;
4016 case DT_FINI:
4017 name = info->fini_function;
4018 get_sym:
4019 /* If it wasn't set by elf_bfd_final_link
4cc11e76 4020 then there is nothing to adjust. */
88f7bcd5
NC
4021 if (dyn.d_un.d_val != 0)
4022 {
4023 struct elf_link_hash_entry * eh;
4024
4025 eh = elf_link_hash_lookup (elf_hash_table (info), name,
b34976b6 4026 FALSE, FALSE, TRUE);
88f7bcd5
NC
4027 if (eh != (struct elf_link_hash_entry *) NULL
4028 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
4029 {
4030 dyn.d_un.d_val |= 1;
b34976b6 4031 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
88f7bcd5
NC
4032 }
4033 }
4034 break;
252b5132
RH
4035 }
4036 }
4037
24a1ba0f 4038 /* Fill in the first entry in the procedure linkage table. */
252b5132 4039 if (splt->_raw_size > 0)
f7a74f8c 4040 {
5e681ec4
PB
4041 bfd_vma got_displacement;
4042
4043 /* Calculate the displacement between the PLT slot and &GOT[0]. */
4044 got_displacement = (sgot->output_section->vma
4045 + sgot->output_offset
4046 - splt->output_section->vma
4047 - splt->output_offset
4048 - 16);
4049
f7a74f8c
NC
4050 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
4051 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
4052 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
4053 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5e681ec4
PB
4054#ifdef FOUR_WORD_PLT
4055 /* The displacement value goes in the otherwise-unused last word of
4056 the second entry. */
4057 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
4058#else
4059 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
4060#endif
f7a74f8c 4061 }
252b5132
RH
4062
4063 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4064 really seem like the right value. */
4065 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4066 }
4067
4068 /* Fill in the first three entries in the global offset table. */
4069 if (sgot->_raw_size > 0)
4070 {
4071 if (sdyn == NULL)
4072 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4073 else
4074 bfd_put_32 (output_bfd,
4075 sdyn->output_section->vma + sdyn->output_offset,
4076 sgot->contents);
4077 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4078 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4079 }
4080
4081 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4082
b34976b6 4083 return TRUE;
252b5132
RH
4084}
4085
ba96a88f
NC
4086static void
4087elf32_arm_post_process_headers (abfd, link_info)
4088 bfd * abfd;
5f771d47 4089 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f 4090{
9b485d32 4091 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
e489d0ae 4092 struct elf32_arm_link_hash_table *globals;
ba96a88f
NC
4093
4094 i_ehdrp = elf_elfheader (abfd);
4095
4096 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
4097 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
e489d0ae 4098
93204d3a
PB
4099 if (link_info)
4100 {
4101 globals = elf32_arm_hash_table (link_info);
4102 if (globals->byteswap_code)
4103 i_ehdrp->e_flags |= EF_ARM_BE8;
4104 }
ba96a88f
NC
4105}
4106
99e4ae17 4107static enum elf_reloc_type_class
f51e552e
AM
4108elf32_arm_reloc_type_class (rela)
4109 const Elf_Internal_Rela *rela;
99e4ae17 4110{
f51e552e 4111 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ
4112 {
4113 case R_ARM_RELATIVE:
4114 return reloc_class_relative;
4115 case R_ARM_JUMP_SLOT:
4116 return reloc_class_plt;
4117 case R_ARM_COPY:
4118 return reloc_class_copy;
4119 default:
4120 return reloc_class_normal;
4121 }
4122}
4123
1829f4b2 4124static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, const Elf_Internal_Shdr *));
e16bb312
NC
4125static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean));
4126
4127/* Set the right machine number for an Arm ELF file. */
4128
4129static bfd_boolean
4130elf32_arm_section_flags (flags, hdr)
4131 flagword *flags;
1829f4b2 4132 const Elf_Internal_Shdr *hdr;
e16bb312
NC
4133{
4134 if (hdr->sh_type == SHT_NOTE)
4135 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
4136
4137 return TRUE;
4138}
4139
e489d0ae 4140static void
e16bb312
NC
4141elf32_arm_final_write_processing (abfd, linker)
4142 bfd *abfd;
4143 bfd_boolean linker ATTRIBUTE_UNUSED;
4144{
5a6c6817 4145 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
e16bb312
NC
4146}
4147
e489d0ae
PB
4148
4149/* Called for each symbol. Builds a section map based on mapping symbols.
4150 Does not alter any of the symbols. */
4151
4152static bfd_boolean
4153elf32_arm_output_symbol_hook (struct bfd_link_info *info,
4154 const char *name,
4155 Elf_Internal_Sym *elfsym,
4156 asection *input_sec,
4157 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
4158{
4159 int mapcount;
4160 elf32_arm_section_map *map;
4161 struct elf32_arm_link_hash_table *globals;
4162
4163 /* Only do this on final link. */
4164 if (info->relocatable)
4165 return TRUE;
4166
4167 /* Only build a map if we need to byteswap code. */
4168 globals = elf32_arm_hash_table (info);
4169 if (!globals->byteswap_code)
4170 return TRUE;
4171
4172 /* We only want mapping symbols. */
4173 if (name == NULL
4174 || name[0] != '$'
4175 || (name[1] != 'a'
4176 && name[1] != 't'
4177 && name[1] != 'd'))
4178 return TRUE;
4179
4180 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
4181 map = elf32_arm_section_data (input_sec)->map;
4182 /* TODO: This may be inefficient, but we probably don't usually have many
4183 mapping symbols per section. */
4184 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
4185 elf32_arm_section_data (input_sec)->map = map;
4186
4187 map[mapcount - 1].vma = elfsym->st_value;
4188 map[mapcount - 1].type = name[1];
4189 return TRUE;
4190}
4191
4192
4193/* Allocate target specific section data. */
4194
4195static bfd_boolean
4196elf32_arm_new_section_hook (bfd *abfd, asection *sec)
4197{
4198 struct _arm_elf_section_data *sdata;
4199 bfd_size_type amt = sizeof (*sdata);
4200
4201 sdata = bfd_zalloc (abfd, amt);
4202 if (sdata == NULL)
4203 return FALSE;
4204 sec->used_by_bfd = sdata;
4205
4206 return _bfd_elf_new_section_hook (abfd, sec);
4207}
4208
4209
4210/* Used to order a list of mapping symbols by address. */
4211
4212static int
4213elf32_arm_compare_mapping (const void * a, const void * b)
4214{
4215 return ((const elf32_arm_section_map *) a)->vma
4216 > ((const elf32_arm_section_map *) b)->vma;
4217}
4218
4219
4220/* Do code byteswapping. Return FALSE afterwards so that the section is
4221 written out as normal. */
4222
4223static bfd_boolean
4224elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
4225 bfd_byte *contents)
4226{
4227 int mapcount;
4228 elf32_arm_section_map *map;
4229 bfd_vma ptr;
4230 bfd_vma end;
4231 bfd_vma offset;
4232 bfd_byte tmp;
4233 int i;
4234
4235 mapcount = elf32_arm_section_data (sec)->mapcount;
4236 map = elf32_arm_section_data (sec)->map;
4237
4238 if (mapcount == 0)
4239 return FALSE;
4240
4241 qsort (map, mapcount, sizeof (elf32_arm_section_map),
4242 elf32_arm_compare_mapping);
4243
4244 offset = sec->output_section->vma + sec->output_offset;
4245 ptr = map[0].vma - offset;
4246 for (i = 0; i < mapcount; i++)
4247 {
4248 if (i == mapcount - 1)
4249 end = bfd_section_size (output_bfd, sec);
4250 else
4251 end = map[i + 1].vma - offset;
4252
4253 switch (map[i].type)
4254 {
4255 case 'a':
4256 /* Byte swap code words. */
4257 while (ptr + 3 < end)
4258 {
4259 tmp = contents[ptr];
4260 contents[ptr] = contents[ptr + 3];
4261 contents[ptr + 3] = tmp;
4262 tmp = contents[ptr + 1];
4263 contents[ptr + 1] = contents[ptr + 2];
4264 contents[ptr + 2] = tmp;
4265 ptr += 4;
4266 }
4267 break;
4268
4269 case 't':
4270 /* Byte swap code halfwords. */
4271 while (ptr + 1 < end)
4272 {
4273 tmp = contents[ptr];
4274 contents[ptr] = contents[ptr + 1];
4275 contents[ptr + 1] = tmp;
4276 ptr += 2;
4277 }
4278 break;
4279
4280 case 'd':
4281 /* Leave data alone. */
4282 break;
4283 }
4284 ptr = end;
4285 }
93204d3a 4286 free (map);
e489d0ae
PB
4287 return FALSE;
4288}
4289
252b5132
RH
4290#define ELF_ARCH bfd_arch_arm
4291#define ELF_MACHINE_CODE EM_ARM
d0facd1b
NC
4292#ifdef __QNXTARGET__
4293#define ELF_MAXPAGESIZE 0x1000
4294#else
f21f3fe0 4295#define ELF_MAXPAGESIZE 0x8000
d0facd1b 4296#endif
252b5132 4297
99e4ae17
AJ
4298#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
4299#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH
4300#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
4301#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
4302#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 4303#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132 4304#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
e489d0ae 4305#define bfd_elf32_new_section_hook elf32_arm_new_section_hook
252b5132
RH
4306
4307#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
4308#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
4309#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
4310#define elf_backend_check_relocs elf32_arm_check_relocs
dc810e39 4311#define elf_backend_relocate_section elf32_arm_relocate_section
e489d0ae 4312#define elf_backend_write_section elf32_arm_write_section
252b5132 4313#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5e681ec4 4314#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
252b5132
RH
4315#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
4316#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
e489d0ae 4317#define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
252b5132 4318#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 4319#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 4320#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
c178919b 4321#define elf_backend_object_p elf32_arm_object_p
e16bb312
NC
4322#define elf_backend_section_flags elf32_arm_section_flags
4323#define elf_backend_final_write_processing elf32_arm_final_write_processing
5e681ec4 4324#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
252b5132 4325
5e681ec4 4326#define elf_backend_can_refcount 1
252b5132
RH
4327#define elf_backend_can_gc_sections 1
4328#define elf_backend_plt_readonly 1
4329#define elf_backend_want_got_plt 1
4330#define elf_backend_want_plt_sym 0
acf8aed4 4331#if !USE_REL
b491616a
AM
4332#define elf_backend_rela_normal 1
4333#endif
252b5132 4334
04f7c78d 4335#define elf_backend_got_header_size 12
04f7c78d 4336
252b5132 4337#include "elf32-target.h"
7e392df6 4338
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