projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Fix off-by-one error whilst sweeping vtable relocs
[deliverable/binutils-gdb.git] / bfd / elf32-arm.h
CommitLineData
252b5132 1/* 32-bit ELF support for ARM
7898deda 2 Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
252b5132
RH		 3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
252b5132
RH		 20typedef unsigned long int insn32;
21typedef unsigned short int insn16;
22
23static boolean elf32_arm_set_private_flags
24 PARAMS ((bfd *, flagword));
25static boolean elf32_arm_copy_private_bfd_data
26 PARAMS ((bfd *, bfd *));
27static boolean elf32_arm_merge_private_bfd_data
28 PARAMS ((bfd *, bfd *));
29static boolean elf32_arm_print_private_bfd_data
30 PARAMS ((bfd *, PTR));
f21f3fe0 31static int elf32_arm_get_symbol_type
252b5132
RH		 32 PARAMS (( Elf_Internal_Sym *, int));
33static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
34 PARAMS ((bfd *));
35static bfd_reloc_status_type elf32_arm_final_link_relocate
780a67af
NC		 36 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
37 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
38 const char *, unsigned char, struct elf_link_hash_entry *));
252b5132
RH		 39static insn32 insert_thumb_branch
40 PARAMS ((insn32, int));
41static struct elf_link_hash_entry *find_thumb_glue
917583ad 42 PARAMS ((struct bfd_link_info *, const char *, bfd *));
252b5132 43static struct elf_link_hash_entry *find_arm_glue
917583ad 44 PARAMS ((struct bfd_link_info *, const char *, bfd *));
252b5132
RH		 45static void record_arm_to_thumb_glue
46 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
47static void record_thumb_to_arm_glue
48 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
ba96a88f
NC		 49static void elf32_arm_post_process_headers
50 PARAMS ((bfd *, struct bfd_link_info *));
bcbdc74c
NC		 51static int elf32_arm_to_thumb_stub
52 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
53 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
54static int elf32_thumb_to_arm_stub
55 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
56 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
917583ad
NC		 57static boolean elf32_arm_relocate_section
58 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
59 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
60static asection * elf32_arm_gc_mark_hook
61 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
62 struct elf_link_hash_entry *, Elf_Internal_Sym *));
63static boolean elf32_arm_gc_sweep_hook
64 PARAMS ((bfd *, struct bfd_link_info *, asection *,
65 const Elf_Internal_Rela *));
66static boolean elf32_arm_check_relocs
67 PARAMS ((bfd *, struct bfd_link_info *, asection *,
68 const Elf_Internal_Rela *));
69static boolean elf32_arm_find_nearest_line
70 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
71 const char **, unsigned int *));
72static boolean elf32_arm_adjust_dynamic_symbol
73 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
74static boolean elf32_arm_size_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76static boolean elf32_arm_finish_dynamic_symbol
77 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
78 Elf_Internal_Sym *));
79static boolean elf32_arm_finish_dynamic_sections
80 PARAMS ((bfd *, struct bfd_link_info *));
81static struct bfd_hash_entry * elf32_arm_link_hash_newfunc
82 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
83#ifdef USE_REL
84static void arm_add_to_rel
85 PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma));
86#endif
252b5132 87
917583ad
NC		 88boolean bfd_elf32_arm_allocate_interworking_sections
89 PARAMS ((struct bfd_link_info *));
90boolean bfd_elf32_arm_get_bfd_for_interworking
91 PARAMS ((bfd *, struct bfd_link_info *));
92boolean bfd_elf32_arm_process_before_allocation
93 PARAMS ((bfd *, struct bfd_link_info *, int));
99e4ae17
AJ		 94static enum elf_reloc_type_class elf32_arm_reloc_type_class
95 PARAMS ((int));
96
fd2ec330 97#define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
9b485d32 98
252b5132
RH		 99/* The linker script knows the section names for placement.
100 The entry_names are used to do simple name mangling on the stubs.
101 Given a function name, and its type, the stub can be found. The
9b485d32 102 name can be changed. The only requirement is the %s be present. */
252b5132
RH		 103#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
104#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
105
106#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
107#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
108
109/* The name of the dynamic interpreter. This is put in the .interp
110 section. */
111#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
112
113/* The size in bytes of an entry in the procedure linkage table. */
252b5132
RH		 114#define PLT_ENTRY_SIZE 16
115
116/* The first entry in a procedure linkage table looks like
117 this. It is set up so that any shared library function that is
59f2c4e7 118 called before the relocation has been set up calls the dynamic
9b485d32 119 linker first. */
7a25cd3e 120static const unsigned long elf32_arm_plt0_entry [PLT_ENTRY_SIZE / 4] =
917583ad
NC		 121 {
122 0xe52de004, /* str lr, [sp, #-4]! */
123 0xe59fe010, /* ldr lr, [pc, #16] */
124 0xe08fe00e, /* add lr, pc, lr */
125 0xe5bef008 /* ldr pc, [lr, #8]! */
126 };
252b5132
RH		 127
128/* Subsequent entries in a procedure linkage table look like
129 this. */
7a25cd3e 130static const unsigned long elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
99e4ae17 131 {
917583ad
NC		 132 0xe59fc004, /* ldr ip, [pc, #4] */
133 0xe08fc00c, /* add ip, pc, ip */
134 0xe59cf000, /* ldr pc, [ip] */
135 0x00000000 /* offset to symbol in got */
136 };
252b5132 137
252b5132
RH		 138/* The ARM linker needs to keep track of the number of relocs that it
139 decides to copy in check_relocs for each symbol. This is so that
140 it can discard PC relative relocs if it doesn't need them when
141 linking with -Bsymbolic. We store the information in a field
142 extending the regular ELF linker hash table. */
143
144/* This structure keeps track of the number of PC relative relocs we
145 have copied for a given symbol. */
252b5132 146struct elf32_arm_pcrel_relocs_copied
917583ad
NC		 147 {
148 /* Next section. */
149 struct elf32_arm_pcrel_relocs_copied * next;
150 /* A section in dynobj. */
151 asection * section;
152 /* Number of relocs copied in this section. */
153 bfd_size_type count;
154 };
252b5132 155
ba96a88f 156/* Arm ELF linker hash entry. */
252b5132 157struct elf32_arm_link_hash_entry
917583ad
NC		 158 {
159 struct elf_link_hash_entry root;
252b5132 160
917583ad
NC		 161 /* Number of PC relative relocs copied for this symbol. */
162 struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied;
163 };
252b5132
RH		 164
165/* Declare this now that the above structures are defined. */
252b5132
RH		 166static boolean elf32_arm_discard_copies
167 PARAMS ((struct elf32_arm_link_hash_entry *, PTR));
168
169/* Traverse an arm ELF linker hash table. */
252b5132
RH		 170#define elf32_arm_link_hash_traverse(table, func, info) \
171 (elf_link_hash_traverse \
172 (&(table)->root, \
173 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
174 (info)))
175
176/* Get the ARM elf linker hash table from a link_info structure. */
177#define elf32_arm_hash_table(info) \
178 ((struct elf32_arm_link_hash_table *) ((info)->hash))
179
9b485d32 180/* ARM ELF linker hash table. */
252b5132 181struct elf32_arm_link_hash_table
917583ad
NC		 182 {
183 /* The main hash table. */
184 struct elf_link_hash_table root;
252b5132 185
917583ad
NC		 186 /* The size in bytes of the section containg the Thumb-to-ARM glue. */
187 long int thumb_glue_size;
252b5132 188
917583ad
NC		 189 /* The size in bytes of the section containg the ARM-to-Thumb glue. */
190 long int arm_glue_size;
252b5132 191
917583ad
NC		 192 /* An arbitary input BFD chosen to hold the glue sections. */
193 bfd * bfd_of_glue_owner;
ba96a88f 194
917583ad
NC		 195 /* A boolean indicating whether knowledge of the ARM's pipeline
196 length should be applied by the linker. */
197 int no_pipeline_knowledge;
198 };
252b5132 199
780a67af
NC		 200/* Create an entry in an ARM ELF linker hash table. */
201
202static struct bfd_hash_entry *
203elf32_arm_link_hash_newfunc (entry, table, string)
204 struct bfd_hash_entry * entry;
205 struct bfd_hash_table * table;
206 const char * string;
207{
208 struct elf32_arm_link_hash_entry * ret =
209 (struct elf32_arm_link_hash_entry *) entry;
210
211 /* Allocate the structure if it has not already been allocated by a
212 subclass. */
213 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
214 ret = ((struct elf32_arm_link_hash_entry *)
215 bfd_hash_allocate (table,
216 sizeof (struct elf32_arm_link_hash_entry)));
217 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
218 return (struct bfd_hash_entry *) ret;
219
220 /* Call the allocation method of the superclass. */
221 ret = ((struct elf32_arm_link_hash_entry *)
222 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
223 table, string));
224 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
225 ret->pcrel_relocs_copied = NULL;
226
227 return (struct bfd_hash_entry *) ret;
228}
229
9b485d32 230/* Create an ARM elf linker hash table. */
252b5132
RH		 231
232static struct bfd_link_hash_table *
233elf32_arm_link_hash_table_create (abfd)
234 bfd *abfd;
235{
236 struct elf32_arm_link_hash_table *ret;
237
238 ret = ((struct elf32_arm_link_hash_table *)
239 bfd_alloc (abfd, sizeof (struct elf32_arm_link_hash_table)));
240 if (ret == (struct elf32_arm_link_hash_table *) NULL)
241 return NULL;
242
243 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
780a67af 244 elf32_arm_link_hash_newfunc))
252b5132
RH		 245 {
246 bfd_release (abfd, ret);
247 return NULL;
248 }
249
250 ret->thumb_glue_size = 0;
251 ret->arm_glue_size = 0;
252 ret->bfd_of_glue_owner = NULL;
ba96a88f 253 ret->no_pipeline_knowledge = 0;
252b5132
RH		 254
255 return &ret->root.root;
256}
257
9b485d32
NC		 258/* Locate the Thumb encoded calling stub for NAME. */
259
252b5132
RH		 260static struct elf_link_hash_entry *
261find_thumb_glue (link_info, name, input_bfd)
262 struct bfd_link_info *link_info;
917583ad 263 const char *name;
252b5132
RH		 264 bfd *input_bfd;
265{
266 char *tmp_name;
267 struct elf_link_hash_entry *hash;
268 struct elf32_arm_link_hash_table *hash_table;
269
270 /* We need a pointer to the armelf specific hash table. */
271 hash_table = elf32_arm_hash_table (link_info);
272
252b5132
RH		 273 tmp_name = ((char *)
274 bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1));
275
276 BFD_ASSERT (tmp_name);
277
278 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
279
280 hash = elf_link_hash_lookup
281 (&(hash_table)->root, tmp_name, false, false, true);
282
283 if (hash == NULL)
284 /* xgettext:c-format */
9b485d32 285 _bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"),
252b5132
RH		 286 bfd_get_filename (input_bfd), tmp_name, name);
287
288 free (tmp_name);
289
290 return hash;
291}
292
9b485d32
NC		 293/* Locate the ARM encoded calling stub for NAME. */
294
252b5132
RH		 295static struct elf_link_hash_entry *
296find_arm_glue (link_info, name, input_bfd)
297 struct bfd_link_info *link_info;
917583ad 298 const char *name;
252b5132
RH		 299 bfd *input_bfd;
300{
301 char *tmp_name;
302 struct elf_link_hash_entry *myh;
303 struct elf32_arm_link_hash_table *hash_table;
304
305 /* We need a pointer to the elfarm specific hash table. */
306 hash_table = elf32_arm_hash_table (link_info);
307
308 tmp_name = ((char *)
309 bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
310
311 BFD_ASSERT (tmp_name);
312
313 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
314
315 myh = elf_link_hash_lookup
316 (&(hash_table)->root, tmp_name, false, false, true);
317
318 if (myh == NULL)
319 /* xgettext:c-format */
9b485d32 320 _bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"),
252b5132
RH		 321 bfd_get_filename (input_bfd), tmp_name, name);
322
323 free (tmp_name);
324
325 return myh;
326}
327
9b485d32 328/* ARM->Thumb glue:
252b5132
RH		 329
330 .arm
331 __func_from_arm:
332 ldr r12, __func_addr
333 bx r12
334 __func_addr:
9b485d32 335 .word func @ behave as if you saw a ARM_32 reloc. */
252b5132
RH		 336
337#define ARM2THUMB_GLUE_SIZE 12
338static const insn32 a2t1_ldr_insn = 0xe59fc000;
339static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
340static const insn32 a2t3_func_addr_insn = 0x00000001;
341
9b485d32 342/* Thumb->ARM: Thumb->(non-interworking aware) ARM
252b5132
RH		 343
344 .thumb .thumb
345 .align 2 .align 2
346 __func_from_thumb: __func_from_thumb:
347 bx pc push {r6, lr}
348 nop ldr r6, __func_addr
349 .arm mov lr, pc
350 __func_change_to_arm: bx r6
351 b func .arm
352 __func_back_to_thumb:
353 ldmia r13! {r6, lr}
354 bx lr
355 __func_addr:
9b485d32 356 .word func */
252b5132
RH		 357
358#define THUMB2ARM_GLUE_SIZE 8
359static const insn16 t2a1_bx_pc_insn = 0x4778;
360static const insn16 t2a2_noop_insn = 0x46c0;
361static const insn32 t2a3_b_insn = 0xea000000;
362
363static const insn16 t2a1_push_insn = 0xb540;
364static const insn16 t2a2_ldr_insn = 0x4e03;
365static const insn16 t2a3_mov_insn = 0x46fe;
366static const insn16 t2a4_bx_insn = 0x4730;
367static const insn32 t2a5_pop_insn = 0xe8bd4040;
368static const insn32 t2a6_bx_insn = 0xe12fff1e;
369
370boolean
371bfd_elf32_arm_allocate_interworking_sections (info)
372 struct bfd_link_info * info;
373{
374 asection * s;
375 bfd_byte * foo;
376 struct elf32_arm_link_hash_table * globals;
377
378 globals = elf32_arm_hash_table (info);
379
380 BFD_ASSERT (globals != NULL);
381
382 if (globals->arm_glue_size != 0)
383 {
384 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
385
386 s = bfd_get_section_by_name
387 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
388
389 BFD_ASSERT (s != NULL);
390
391 foo = (bfd_byte *) bfd_alloc
392 (globals->bfd_of_glue_owner, globals->arm_glue_size);
393
394 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
395 s->contents = foo;
396 }
397
398 if (globals->thumb_glue_size != 0)
399 {
400 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
401
402 s = bfd_get_section_by_name
403 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
404
405 BFD_ASSERT (s != NULL);
406
407 foo = (bfd_byte *) bfd_alloc
408 (globals->bfd_of_glue_owner, globals->thumb_glue_size);
409
410 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
411 s->contents = foo;
412 }
413
414 return true;
415}
416
417static void
418record_arm_to_thumb_glue (link_info, h)
419 struct bfd_link_info * link_info;
420 struct elf_link_hash_entry * h;
421{
422 const char * name = h->root.root.string;
423 register asection * s;
424 char * tmp_name;
425 struct elf_link_hash_entry * myh;
426 struct elf32_arm_link_hash_table * globals;
427
428 globals = elf32_arm_hash_table (link_info);
429
430 BFD_ASSERT (globals != NULL);
431 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
432
433 s = bfd_get_section_by_name
434 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
435
252b5132
RH		 436 BFD_ASSERT (s != NULL);
437
438 tmp_name = ((char *)
439 bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
440
441 BFD_ASSERT (tmp_name);
442
443 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
444
445 myh = elf_link_hash_lookup
446 (&(globals)->root, tmp_name, false, false, true);
447
448 if (myh != NULL)
449 {
9b485d32 450 /* We've already seen this guy. */
252b5132 451 free (tmp_name);
9b485d32 452 return;
252b5132
RH		 453 }
454
455 /* The only trick here is using hash_table->arm_glue_size as the value. Even
456 though the section isn't allocated yet, this is where we will be putting
457 it. */
252b5132
RH		 458 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, tmp_name,
459 BSF_GLOBAL,
460 s, globals->arm_glue_size + 1,
461 NULL, true, false,
462 (struct bfd_link_hash_entry **) &myh);
463
464 free (tmp_name);
465
466 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
467
468 return;
469}
470
471static void
472record_thumb_to_arm_glue (link_info, h)
473 struct bfd_link_info *link_info;
474 struct elf_link_hash_entry *h;
475{
476 const char *name = h->root.root.string;
477 register asection *s;
478 char *tmp_name;
479 struct elf_link_hash_entry *myh;
480 struct elf32_arm_link_hash_table *hash_table;
481 char bind;
482
483 hash_table = elf32_arm_hash_table (link_info);
484
485 BFD_ASSERT (hash_table != NULL);
486 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
487
488 s = bfd_get_section_by_name
489 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
490
491 BFD_ASSERT (s != NULL);
492
493 tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
494
495 BFD_ASSERT (tmp_name);
496
497 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
498
499 myh = elf_link_hash_lookup
500 (&(hash_table)->root, tmp_name, false, false, true);
501
502 if (myh != NULL)
503 {
9b485d32 504 /* We've already seen this guy. */
252b5132 505 free (tmp_name);
9b485d32 506 return;
252b5132
RH		 507 }
508
509 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name,
510 BSF_GLOBAL, s, hash_table->thumb_glue_size + 1,
511 NULL, true, false,
512 (struct bfd_link_hash_entry **) &myh);
513
9b485d32 514 /* If we mark it 'Thumb', the disassembler will do a better job. */
252b5132
RH		 515 bind = ELF_ST_BIND (myh->type);
516 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
517
518 free (tmp_name);
519
252b5132
RH		 520#define CHANGE_TO_ARM "__%s_change_to_arm"
521#define BACK_FROM_ARM "__%s_back_from_arm"
522
9b485d32 523 /* Allocate another symbol to mark where we switch to Arm mode. */
252b5132
RH		 524 tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1);
525
526 BFD_ASSERT (tmp_name);
527
528 sprintf (tmp_name, CHANGE_TO_ARM, name);
529
530 myh = NULL;
531
532 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name,
533 BSF_LOCAL, s, hash_table->thumb_glue_size + 4,
534 NULL, true, false,
535 (struct bfd_link_hash_entry **) &myh);
536
537 free (tmp_name);
538
539 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
540
541 return;
542}
543
544/* Select a BFD to be used to hold the sections used by the glue code.
545 This function is called from the linker scripts in ld/emultempl/
546 {armelf/pe}.em */
9b485d32 547
252b5132
RH		 548boolean
549bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
550 bfd *abfd;
551 struct bfd_link_info *info;
552{
553 struct elf32_arm_link_hash_table *globals;
554 flagword flags;
555 asection *sec;
556
557 /* If we are only performing a partial link do not bother
558 getting a bfd to hold the glue. */
559 if (info->relocateable)
560 return true;
561
562 globals = elf32_arm_hash_table (info);
563
564 BFD_ASSERT (globals != NULL);
565
566 if (globals->bfd_of_glue_owner != NULL)
567 return true;
568
569 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
570
571 if (sec == NULL)
572 {
57db232e
NC		 573 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
574 will prevent elf_link_input_bfd() from processing the contents
575 of this section. */
811b4bf6 576 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 577
578 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
579
580 if (sec == NULL
581 || !bfd_set_section_flags (abfd, sec, flags)
582 || !bfd_set_section_alignment (abfd, sec, 2))
583 return false;
9a5aca8c 584
57db232e
NC		 585 /* Set the gc mark to prevent the section from being removed by garbage
586 collection, despite the fact that no relocs refer to this section. */
587 sec->gc_mark = 1;
252b5132
RH		 588 }
589
590 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
591
592 if (sec == NULL)
593 {
811b4bf6 594 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 595
596 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
597
598 if (sec == NULL
599 || !bfd_set_section_flags (abfd, sec, flags)
600 || !bfd_set_section_alignment (abfd, sec, 2))
601 return false;
9a5aca8c 602
57db232e 603 sec->gc_mark = 1;
252b5132
RH		 604 }
605
606 /* Save the bfd for later use. */
607 globals->bfd_of_glue_owner = abfd;
608
609 return true;
610}
611
612boolean
ba96a88f 613bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
252b5132
RH		 614 bfd *abfd;
615 struct bfd_link_info *link_info;
ba96a88f 616 int no_pipeline_knowledge;
252b5132
RH		 617{
618 Elf_Internal_Shdr *symtab_hdr;
619 Elf_Internal_Rela *free_relocs = NULL;
620 Elf_Internal_Rela *irel, *irelend;
621 bfd_byte *contents = NULL;
622 bfd_byte *free_contents = NULL;
623 Elf32_External_Sym *extsyms = NULL;
624 Elf32_External_Sym *free_extsyms = NULL;
625
626 asection *sec;
627 struct elf32_arm_link_hash_table *globals;
628
629 /* If we are only performing a partial link do not bother
630 to construct any glue. */
631 if (link_info->relocateable)
632 return true;
633
634 /* Here we have a bfd that is to be included on the link. We have a hook
635 to do reloc rummaging, before section sizes are nailed down. */
252b5132
RH		 636 globals = elf32_arm_hash_table (link_info);
637
638 BFD_ASSERT (globals != NULL);
639 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
640
ba96a88f 641 globals->no_pipeline_knowledge = no_pipeline_knowledge;
f21f3fe0 642
252b5132
RH		 643 /* Rummage around all the relocs and map the glue vectors. */
644 sec = abfd->sections;
645
646 if (sec == NULL)
647 return true;
648
649 for (; sec != NULL; sec = sec->next)
650 {
651 if (sec->reloc_count == 0)
652 continue;
653
654 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 655
9b485d32 656 /* Load the relocs. */
252b5132
RH		 657 irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL,
658 (Elf_Internal_Rela *) NULL, false));
659
660 BFD_ASSERT (irel != 0);
661
662 irelend = irel + sec->reloc_count;
663 for (; irel < irelend; irel++)
664 {
665 long r_type;
666 unsigned long r_index;
252b5132
RH		 667
668 struct elf_link_hash_entry *h;
669
670 r_type = ELF32_R_TYPE (irel->r_info);
671 r_index = ELF32_R_SYM (irel->r_info);
672
9b485d32 673 /* These are the only relocation types we care about. */
ba96a88f 674 if ( r_type != R_ARM_PC24
252b5132
RH		 675 && r_type != R_ARM_THM_PC22)
676 continue;
677
678 /* Get the section contents if we haven't done so already. */
679 if (contents == NULL)
680 {
681 /* Get cached copy if it exists. */
682 if (elf_section_data (sec)->this_hdr.contents != NULL)
683 contents = elf_section_data (sec)->this_hdr.contents;
684 else
685 {
686 /* Go get them off disk. */
687 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
688 if (contents == NULL)
689 goto error_return;
9b485d32 690
252b5132
RH		 691 free_contents = contents;
692
693 if (!bfd_get_section_contents (abfd, sec, contents,
694 (file_ptr) 0, sec->_raw_size))
695 goto error_return;
696 }
697 }
698
699 /* Read this BFD's symbols if we haven't done so already. */
700 if (extsyms == NULL)
701 {
702 /* Get cached copy if it exists. */
703 if (symtab_hdr->contents != NULL)
704 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
705 else
706 {
707 /* Go get them off disk. */
708 extsyms = ((Elf32_External_Sym *)
709 bfd_malloc (symtab_hdr->sh_size));
710 if (extsyms == NULL)
711 goto error_return;
9b485d32 712
252b5132 713 free_extsyms = extsyms;
9b485d32 714
252b5132
RH		 715 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
716 || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
717 != symtab_hdr->sh_size))
718 goto error_return;
719 }
720 }
721
a7c10850 722 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH		 723 h = NULL;
724
9b485d32 725 /* We don't care about local symbols. */
252b5132
RH		 726 if (r_index < symtab_hdr->sh_info)
727 continue;
728
9b485d32 729 /* This is an external symbol. */
252b5132
RH		 730 r_index -= symtab_hdr->sh_info;
731 h = (struct elf_link_hash_entry *)
732 elf_sym_hashes (abfd)[r_index];
733
734 /* If the relocation is against a static symbol it must be within
735 the current section and so cannot be a cross ARM/Thumb relocation. */
736 if (h == NULL)
737 continue;
738
739 switch (r_type)
740 {
741 case R_ARM_PC24:
742 /* This one is a call from arm code. We need to look up
2f0ca46a 743 the target of the call. If it is a thumb target, we
252b5132 744 insert glue. */
252b5132
RH		 745 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
746 record_arm_to_thumb_glue (link_info, h);
747 break;
748
749 case R_ARM_THM_PC22:
f21f3fe0 750 /* This one is a call from thumb code. We look
2f0ca46a 751 up the target of the call. If it is not a thumb
bcbdc74c 752 target, we insert glue. */
252b5132
RH		 753 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
754 record_thumb_to_arm_glue (link_info, h);
755 break;
756
757 default:
758 break;
759 }
760 }
761 }
762
763 return true;
9a5aca8c 764
252b5132
RH		 765error_return:
766 if (free_relocs != NULL)
767 free (free_relocs);
768 if (free_contents != NULL)
769 free (free_contents);
770 if (free_extsyms != NULL)
771 free (free_extsyms);
9a5aca8c 772
252b5132 773 return false;
252b5132
RH		 774}
775
776/* The thumb form of a long branch is a bit finicky, because the offset
777 encoding is split over two fields, each in it's own instruction. They
f21f3fe0 778 can occur in any order. So given a thumb form of long branch, and an
252b5132 779 offset, insert the offset into the thumb branch and return finished
f21f3fe0 780 instruction.
252b5132 781
f21f3fe0 782 It takes two thumb instructions to encode the target address. Each has
252b5132 783 11 bits to invest. The upper 11 bits are stored in one (identifed by
f21f3fe0
UD		 784 H-0.. see below), the lower 11 bits are stored in the other (identified
785 by H-1).
252b5132 786
f21f3fe0 787 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH		 788 there you have it.
789
790 Op: 1111 = F,
791 H-0, upper address-0 = 000
792 Op: 1111 = F,
793 H-1, lower address-0 = 800
794
f21f3fe0 795 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH		 796 the lower one first. It probably doesn't matter. krk@cygnus.com
797
798 XXX: Actually the order does matter. The second instruction (H-1)
799 moves the computed address into the PC, so it must be the second one
800 in the sequence. The problem, however is that whilst little endian code
801 stores the instructions in HI then LOW order, big endian code does the
dfc5f959 802 reverse. nickc@cygnus.com. */
252b5132 803
dfc5f959
NC		 804#define LOW_HI_ORDER 0xF800F000
805#define HI_LOW_ORDER 0xF000F800
252b5132
RH		 806
807static insn32
808insert_thumb_branch (br_insn, rel_off)
809 insn32 br_insn;
810 int rel_off;
811{
812 unsigned int low_bits;
813 unsigned int high_bits;
814
252b5132
RH		 815 BFD_ASSERT ((rel_off & 1) != 1);
816
dfc5f959
NC		 817 rel_off >>= 1; /* Half word aligned address. */
818 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
819 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
252b5132
RH		 820
821 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
822 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
823 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
824 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
825 else
9b485d32
NC		 826 /* FIXME: abort is probably not the right call. krk@cygnus.com */
827 abort (); /* error - not a valid branch instruction form. */
252b5132 828
252b5132
RH		 829 return br_insn;
830}
831
9b485d32
NC		 832/* Thumb code calling an ARM function. */
833
252b5132
RH		 834static int
835elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
836 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 837 struct bfd_link_info * info;
838 const char * name;
839 bfd * input_bfd;
840 bfd * output_bfd;
841 asection * input_section;
842 bfd_byte * hit_data;
843 asection * sym_sec;
844 bfd_vma offset;
845 bfd_signed_vma addend;
846 bfd_vma val;
252b5132 847{
bcbdc74c 848 asection * s = 0;
252b5132
RH		 849 long int my_offset;
850 unsigned long int tmp;
851 long int ret_offset;
bcbdc74c
NC		 852 struct elf_link_hash_entry * myh;
853 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 854
855 myh = find_thumb_glue (info, name, input_bfd);
856 if (myh == NULL)
857 return false;
858
859 globals = elf32_arm_hash_table (info);
860
861 BFD_ASSERT (globals != NULL);
862 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
863
864 my_offset = myh->root.u.def.value;
865
866 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
867 THUMB2ARM_GLUE_SECTION_NAME);
868
869 BFD_ASSERT (s != NULL);
870 BFD_ASSERT (s->contents != NULL);
871 BFD_ASSERT (s->output_section != NULL);
872
873 if ((my_offset & 0x01) == 0x01)
874 {
875 if (sym_sec != NULL
876 && sym_sec->owner != NULL
877 && !INTERWORK_FLAG (sym_sec->owner))
878 {
879 _bfd_error_handler
9b485d32 880 (_("%s(%s): warning: interworking not enabled."),
252b5132
RH		 881 bfd_get_filename (sym_sec->owner), name);
882 _bfd_error_handler
9b485d32 883 (_(" first occurrence: %s: thumb call to arm"),
252b5132
RH		 884 bfd_get_filename (input_bfd));
885
886 return false;
887 }
888
889 --my_offset;
890 myh->root.u.def.value = my_offset;
891
892 bfd_put_16 (output_bfd, t2a1_bx_pc_insn,
893 s->contents + my_offset);
894
895 bfd_put_16 (output_bfd, t2a2_noop_insn,
896 s->contents + my_offset + 2);
897
898 ret_offset =
9b485d32
NC		 899 /* Address of destination of the stub. */
900 ((bfd_signed_vma) val)
252b5132 901 - ((bfd_signed_vma)
9b485d32
NC		 902 /* Offset from the start of the current section to the start of the stubs. */
903 (s->output_offset
904 /* Offset of the start of this stub from the start of the stubs. */
905 + my_offset
906 /* Address of the start of the current section. */
907 + s->output_section->vma)
908 /* The branch instruction is 4 bytes into the stub. */
909 + 4
910 /* ARM branches work from the pc of the instruction + 8. */
911 + 8);
252b5132
RH		 912
913 bfd_put_32 (output_bfd,
914 t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
915 s->contents + my_offset + 4);
916 }
917
918 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
919
920 /* Now go back and fix up the original BL insn to point
921 to here. */
922 ret_offset =
923 s->output_offset
924 + my_offset
925 - (input_section->output_offset
926 + offset + addend)
756fa1b9 927 - 8;
252b5132
RH		 928
929 tmp = bfd_get_32 (input_bfd, hit_data
930 - input_section->vma);
931
932 bfd_put_32 (output_bfd,
933 insert_thumb_branch (tmp, ret_offset),
934 hit_data - input_section->vma);
935
936 return true;
937}
938
9b485d32
NC		 939/* Arm code calling a Thumb function. */
940
252b5132
RH		 941static int
942elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
943 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 944 struct bfd_link_info * info;
945 const char * name;
946 bfd * input_bfd;
947 bfd * output_bfd;
948 asection * input_section;
949 bfd_byte * hit_data;
950 asection * sym_sec;
951 bfd_vma offset;
952 bfd_signed_vma addend;
953 bfd_vma val;
252b5132
RH		 954{
955 unsigned long int tmp;
956 long int my_offset;
bcbdc74c 957 asection * s;
252b5132 958 long int ret_offset;
bcbdc74c
NC		 959 struct elf_link_hash_entry * myh;
960 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 961
962 myh = find_arm_glue (info, name, input_bfd);
963 if (myh == NULL)
964 return false;
965
966 globals = elf32_arm_hash_table (info);
967
968 BFD_ASSERT (globals != NULL);
969 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
970
971 my_offset = myh->root.u.def.value;
972 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
973 ARM2THUMB_GLUE_SECTION_NAME);
974 BFD_ASSERT (s != NULL);
975 BFD_ASSERT (s->contents != NULL);
976 BFD_ASSERT (s->output_section != NULL);
977
978 if ((my_offset & 0x01) == 0x01)
979 {
980 if (sym_sec != NULL
981 && sym_sec->owner != NULL
982 && !INTERWORK_FLAG (sym_sec->owner))
983 {
984 _bfd_error_handler
9b485d32 985 (_("%s(%s): warning: interworking not enabled."),
252b5132
RH		 986 bfd_get_filename (sym_sec->owner), name);
987 _bfd_error_handler
9b485d32 988 (_(" first occurrence: %s: arm call to thumb"),
252b5132
RH		 989 bfd_get_filename (input_bfd));
990 }
9b485d32 991
252b5132
RH		 992 --my_offset;
993 myh->root.u.def.value = my_offset;
994
995 bfd_put_32 (output_bfd, a2t1_ldr_insn,
996 s->contents + my_offset);
997
998 bfd_put_32 (output_bfd, a2t2_bx_r12_insn,
999 s->contents + my_offset + 4);
1000
1001 /* It's a thumb address. Add the low order bit. */
1002 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
1003 s->contents + my_offset + 8);
1004 }
1005
1006 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1007
1008 tmp = bfd_get_32 (input_bfd, hit_data);
1009 tmp = tmp & 0xFF000000;
1010
9b485d32 1011 /* Somehow these are both 4 too far, so subtract 8. */
252b5132
RH		 1012 ret_offset = s->output_offset
1013 + my_offset
1014 + s->output_section->vma
1015 - (input_section->output_offset
1016 + input_section->output_section->vma
1017 + offset + addend)
1018 - 8;
9a5aca8c 1019
252b5132
RH		 1020 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
1021
1022 bfd_put_32 (output_bfd, tmp, hit_data
1023 - input_section->vma);
1024
252b5132
RH		 1025 return true;
1026}
1027
1028/* Perform a relocation as part of a final link. */
9b485d32 1029
252b5132
RH		 1030static bfd_reloc_status_type
1031elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1032 input_section, contents, rel, value,
780a67af 1033 info, sym_sec, sym_name, sym_flags, h)
252b5132
RH		 1034 reloc_howto_type * howto;
1035 bfd * input_bfd;
1036 bfd * output_bfd;
1037 asection * input_section;
1038 bfd_byte * contents;
1039 Elf_Internal_Rela * rel;
1040 bfd_vma value;
1041 struct bfd_link_info * info;
1042 asection * sym_sec;
1043 const char * sym_name;
1044 unsigned char sym_flags;
780a67af 1045 struct elf_link_hash_entry * h;
252b5132
RH		 1046{
1047 unsigned long r_type = howto->type;
1048 unsigned long r_symndx;
1049 bfd_byte * hit_data = contents + rel->r_offset;
1050 bfd * dynobj = NULL;
1051 Elf_Internal_Shdr * symtab_hdr;
1052 struct elf_link_hash_entry ** sym_hashes;
1053 bfd_vma * local_got_offsets;
1054 asection * sgot = NULL;
1055 asection * splt = NULL;
1056 asection * sreloc = NULL;
252b5132 1057 bfd_vma addend;
ba96a88f
NC		 1058 bfd_signed_vma signed_addend;
1059 struct elf32_arm_link_hash_table * globals;
f21f3fe0 1060
cac15327
NC		 1061 /* If the start address has been set, then set the EF_ARM_HASENTRY
1062 flag. Setting this more than once is redundant, but the cost is
1063 not too high, and it keeps the code simple.
99e4ae17 1064
cac15327
NC		 1065 The test is done here, rather than somewhere else, because the
1066 start address is only set just before the final link commences.
1067
1068 Note - if the user deliberately sets a start address of 0, the
1069 flag will not be set. */
1070 if (bfd_get_start_address (output_bfd) != 0)
1071 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
99e4ae17 1072
ba96a88f 1073 globals = elf32_arm_hash_table (info);
f21f3fe0 1074
252b5132
RH		 1075 dynobj = elf_hash_table (info)->dynobj;
1076 if (dynobj)
1077 {
1078 sgot = bfd_get_section_by_name (dynobj, ".got");
1079 splt = bfd_get_section_by_name (dynobj, ".plt");
1080 }
1081 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1082 sym_hashes = elf_sym_hashes (input_bfd);
1083 local_got_offsets = elf_local_got_offsets (input_bfd);
1084 r_symndx = ELF32_R_SYM (rel->r_info);
1085
1086#ifdef USE_REL
ba96a88f
NC		 1087 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1088
1089 if (addend & ((howto->src_mask + 1) >> 1))
1090 {
1091 signed_addend = -1;
1092 signed_addend &= ~ howto->src_mask;
1093 signed_addend |= addend;
1094 }
1095 else
1096 signed_addend = addend;
252b5132 1097#else
ba96a88f 1098 addend = signed_addend = rel->r_addend;
252b5132 1099#endif
f21f3fe0 1100
252b5132
RH		 1101 switch (r_type)
1102 {
1103 case R_ARM_NONE:
1104 return bfd_reloc_ok;
1105
1106 case R_ARM_PC24:
1107 case R_ARM_ABS32:
1108 case R_ARM_REL32:
dfc5f959
NC		 1109#ifndef OLD_ARM_ABI
1110 case R_ARM_XPC25:
1111#endif
252b5132 1112 /* When generating a shared object, these relocations are copied
9b485d32 1113 into the output file to be resolved at run time. */
252b5132
RH		 1114 if (info->shared
1115 && (r_type != R_ARM_PC24
99e4ae17 1116 || (h != NULL
252b5132
RH		 1117 && h->dynindx != -1
1118 && (! info->symbolic
1119 || (h->elf_link_hash_flags
1120 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1121 {
1122 Elf_Internal_Rel outrel;
1123 boolean skip, relocate;
f21f3fe0 1124
252b5132
RH		 1125 if (sreloc == NULL)
1126 {
1127 const char * name;
f21f3fe0 1128
252b5132
RH		 1129 name = (bfd_elf_string_from_elf_section
1130 (input_bfd,
1131 elf_elfheader (input_bfd)->e_shstrndx,
1132 elf_section_data (input_section)->rel_hdr.sh_name));
1133 if (name == NULL)
1134 return bfd_reloc_notsupported;
f21f3fe0 1135
252b5132
RH		 1136 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1137 && strcmp (bfd_get_section_name (input_bfd,
1138 input_section),
1139 name + 4) == 0);
f21f3fe0 1140
252b5132
RH		 1141 sreloc = bfd_get_section_by_name (dynobj, name);
1142 BFD_ASSERT (sreloc != NULL);
1143 }
f21f3fe0 1144
252b5132 1145 skip = false;
f21f3fe0 1146
252b5132
RH		 1147 if (elf_section_data (input_section)->stab_info == NULL)
1148 outrel.r_offset = rel->r_offset;
1149 else
1150 {
1151 bfd_vma off;
f21f3fe0 1152
252b5132
RH		 1153 off = (_bfd_stab_section_offset
1154 (output_bfd, &elf_hash_table (info)->stab_info,
1155 input_section,
1156 & elf_section_data (input_section)->stab_info,
1157 rel->r_offset));
1158 if (off == (bfd_vma) -1)
1159 skip = true;
1160 outrel.r_offset = off;
1161 }
f21f3fe0 1162
252b5132
RH		 1163 outrel.r_offset += (input_section->output_section->vma
1164 + input_section->output_offset);
f21f3fe0 1165
252b5132
RH		 1166 if (skip)
1167 {
1168 memset (&outrel, 0, sizeof outrel);
1169 relocate = false;
1170 }
1171 else if (r_type == R_ARM_PC24)
1172 {
1173 BFD_ASSERT (h != NULL && h->dynindx != -1);
1174 if ((input_section->flags & SEC_ALLOC) != 0)
1175 relocate = false;
1176 else
1177 relocate = true;
1178 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24);
1179 }
1180 else
1181 {
1182 if (h == NULL
1183 || ((info->symbolic || h->dynindx == -1)
1184 && (h->elf_link_hash_flags
1185 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1186 {
1187 relocate = true;
1188 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1189 }
1190 else
1191 {
1192 BFD_ASSERT (h->dynindx != -1);
1193 if ((input_section->flags & SEC_ALLOC) != 0)
1194 relocate = false;
1195 else
1196 relocate = true;
1197 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32);
1198 }
1199 }
f21f3fe0 1200
252b5132
RH		 1201 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1202 (((Elf32_External_Rel *)
1203 sreloc->contents)
1204 + sreloc->reloc_count));
1205 ++sreloc->reloc_count;
9a5aca8c 1206
f21f3fe0 1207 /* If this reloc is against an external symbol, we do not want to
252b5132 1208 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 1209 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH		 1210 if (! relocate)
1211 return bfd_reloc_ok;
9a5aca8c 1212
f21f3fe0 1213 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1214 contents, rel->r_offset, value,
1215 (bfd_vma) 0);
1216 }
1217 else switch (r_type)
1218 {
dfc5f959
NC		 1219#ifndef OLD_ARM_ABI
1220 case R_ARM_XPC25: /* Arm BLX instruction. */
1221#endif
1222 case R_ARM_PC24: /* Arm B/BL instruction */
1223#ifndef OLD_ARM_ABI
1224 if (r_type == R_ARM_XPC25)
252b5132 1225 {
dfc5f959
NC		 1226 /* Check for Arm calling Arm function. */
1227 /* FIXME: Should we translate the instruction into a BL
1228 instruction instead ? */
1229 if (sym_flags != STT_ARM_TFUNC)
1230 _bfd_error_handler (_("\
1231%s: Warning: Arm BLX instruction targets Arm function '%s'."),
1232 bfd_get_filename (input_bfd),
b1bcb49f 1233 h ? h->root.root.string : "(local)");
dfc5f959
NC		 1234 }
1235 else
1236#endif
1237 {
1238 /* Check for Arm calling Thumb function. */
1239 if (sym_flags == STT_ARM_TFUNC)
1240 {
1241 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1242 input_section, hit_data, sym_sec, rel->r_offset,
1243 signed_addend, value);
1244 return bfd_reloc_ok;
1245 }
252b5132 1246 }
ba96a88f
NC		 1247
1248 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1249 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1250 {
1251 /* The old way of doing things. Trearing the addend as a
1252 byte sized field and adding in the pipeline offset. */
ba96a88f
NC		 1253 value -= (input_section->output_section->vma
1254 + input_section->output_offset);
1255 value -= rel->r_offset;
1256 value += addend;
f21f3fe0 1257
ba96a88f
NC		 1258 if (! globals->no_pipeline_knowledge)
1259 value -= 8;
1260 }
1261 else
1262 {
1263 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1264 where:
1265 S is the address of the symbol in the relocation.
1266 P is address of the instruction being relocated.
1267 A is the addend (extracted from the instruction) in bytes.
f21f3fe0 1268
ba96a88f
NC		 1269 S is held in 'value'.
1270 P is the base address of the section containing the instruction
1271 plus the offset of the reloc into that section, ie:
1272 (input_section->output_section->vma +
1273 input_section->output_offset +
1274 rel->r_offset).
1275 A is the addend, converted into bytes, ie:
1276 (signed_addend * 4)
1277
1278 Note: None of these operations have knowledge of the pipeline
1279 size of the processor, thus it is up to the assembler to encode
1280 this information into the addend. */
ba96a88f
NC		 1281 value -= (input_section->output_section->vma
1282 + input_section->output_offset);
1283 value -= rel->r_offset;
1284 value += (signed_addend << howto->size);
f21f3fe0 1285
ba96a88f
NC		 1286 /* Previous versions of this code also used to add in the pipeline
1287 offset here. This is wrong because the linker is not supposed
1288 to know about such things, and one day it might change. In order
1289 to support old binaries that need the old behaviour however, so
1290 we attempt to detect which ABI was used to create the reloc. */
1291 if (! globals->no_pipeline_knowledge)
f21f3fe0 1292 {
ba96a88f 1293 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
f21f3fe0 1294
ba96a88f 1295 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1296
ba96a88f
NC		 1297 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1298 value -= 8;
1299 }
1300 }
23080146 1301
dcb5e6e6
NC		 1302 signed_addend = value;
1303 signed_addend >>= howto->rightshift;
9a5aca8c 1304
59f2c4e7
NC		 1305 /* It is not an error for an undefined weak reference to be
1306 out of range. Any program that branches to such a symbol
9a5aca8c
AM		 1307 is going to crash anyway, so there is no point worrying
1308 about getting the destination exactly right. */
59f2c4e7
NC		 1309 if (! h || h->root.type != bfd_link_hash_undefweak)
1310 {
9b485d32 1311 /* Perform a signed range check. */
dcb5e6e6 1312 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC		 1313 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1314 return bfd_reloc_overflow;
1315 }
9a5aca8c 1316
dcb5e6e6
NC		 1317#ifndef OLD_ARM_ABI
1318 /* If necessary set the H bit in the BLX instruction. */
1319 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1320 value = (signed_addend & howto->dst_mask)
1321 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1322 | (1 << 24);
1323 else
1324#endif
1325 value = (signed_addend & howto->dst_mask)
1326 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 1327 break;
f21f3fe0 1328
252b5132
RH		 1329 case R_ARM_ABS32:
1330 value += addend;
1331 if (sym_flags == STT_ARM_TFUNC)
1332 value |= 1;
1333 break;
f21f3fe0 1334
252b5132
RH		 1335 case R_ARM_REL32:
1336 value -= (input_section->output_section->vma
62efb346 1337 + input_section->output_offset + rel->r_offset);
252b5132
RH		 1338 value += addend;
1339 break;
1340 }
f21f3fe0 1341
252b5132
RH		 1342 bfd_put_32 (input_bfd, value, hit_data);
1343 return bfd_reloc_ok;
1344
1345 case R_ARM_ABS8:
1346 value += addend;
1347 if ((long) value > 0x7f || (long) value < -0x80)
1348 return bfd_reloc_overflow;
1349
1350 bfd_put_8 (input_bfd, value, hit_data);
1351 return bfd_reloc_ok;
1352
1353 case R_ARM_ABS16:
1354 value += addend;
1355
1356 if ((long) value > 0x7fff || (long) value < -0x8000)
1357 return bfd_reloc_overflow;
1358
1359 bfd_put_16 (input_bfd, value, hit_data);
1360 return bfd_reloc_ok;
1361
1362 case R_ARM_ABS12:
1363 /* Support ldr and str instruction for the arm */
1364 /* Also thumb b (unconditional branch). ??? Really? */
1365 value += addend;
1366
1367 if ((long) value > 0x7ff || (long) value < -0x800)
1368 return bfd_reloc_overflow;
1369
1370 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1371 bfd_put_32 (input_bfd, value, hit_data);
1372 return bfd_reloc_ok;
1373
1374 case R_ARM_THM_ABS5:
9b485d32 1375 /* Support ldr and str instructions for the thumb. */
252b5132
RH		 1376#ifdef USE_REL
1377 /* Need to refetch addend. */
1378 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1379 /* ??? Need to determine shift amount from operand size. */
1380 addend >>= howto->rightshift;
1381#endif
1382 value += addend;
1383
1384 /* ??? Isn't value unsigned? */
1385 if ((long) value > 0x1f || (long) value < -0x10)
1386 return bfd_reloc_overflow;
1387
1388 /* ??? Value needs to be properly shifted into place first. */
1389 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1390 bfd_put_16 (input_bfd, value, hit_data);
1391 return bfd_reloc_ok;
1392
dfc5f959
NC		 1393#ifndef OLD_ARM_ABI
1394 case R_ARM_THM_XPC22:
1395#endif
252b5132 1396 case R_ARM_THM_PC22:
dfc5f959 1397 /* Thumb BL (branch long instruction). */
252b5132 1398 {
ba96a88f
NC		 1399 bfd_vma relocation;
1400 boolean overflow = false;
1401 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1402 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
252b5132 1403 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
ba96a88f
NC		 1404 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1405 bfd_vma check;
252b5132 1406 bfd_signed_vma signed_check;
252b5132
RH		 1407
1408#ifdef USE_REL
1409 /* Need to refetch the addend and squish the two 11 bit pieces
1410 together. */
1411 {
ba96a88f
NC		 1412 bfd_vma upper = upper_insn & 0x7ff;
1413 bfd_vma lower = lower_insn & 0x7ff;
9b485d32 1414 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
252b5132 1415 addend = (upper << 12) | (lower << 1);
ba96a88f 1416 signed_addend = addend;
252b5132
RH		 1417 }
1418#endif
dfc5f959
NC		 1419#ifndef OLD_ARM_ABI
1420 if (r_type == R_ARM_THM_XPC22)
1421 {
1422 /* Check for Thumb to Thumb call. */
1423 /* FIXME: Should we translate the instruction into a BL
1424 instruction instead ? */
1425 if (sym_flags == STT_ARM_TFUNC)
1426 _bfd_error_handler (_("\
1427%s: Warning: Thumb BLX instruction targets thumb function '%s'."),
1428 bfd_get_filename (input_bfd),
b1bcb49f 1429 h ? h->root.root.string : "(local)");
dfc5f959
NC		 1430 }
1431 else
1432#endif
252b5132 1433 {
dfc5f959
NC		 1434 /* If it is not a call to Thumb, assume call to Arm.
1435 If it is a call relative to a section name, then it is not a
1436 function call at all, but rather a long jump. */
1437 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1438 {
1439 if (elf32_thumb_to_arm_stub
1440 (info, sym_name, input_bfd, output_bfd, input_section,
1441 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1442 return bfd_reloc_ok;
1443 else
1444 return bfd_reloc_dangerous;
1445 }
252b5132 1446 }
f21f3fe0 1447
ba96a88f 1448 relocation = value + signed_addend;
f21f3fe0 1449
252b5132 1450 relocation -= (input_section->output_section->vma
ba96a88f
NC		 1451 + input_section->output_offset
1452 + rel->r_offset);
9a5aca8c 1453
ba96a88f
NC		 1454 if (! globals->no_pipeline_knowledge)
1455 {
9b485d32 1456 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
9a5aca8c 1457
ba96a88f 1458 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1459
ba96a88f
NC		 1460 /* Previous versions of this code also used to add in the pipline
1461 offset here. This is wrong because the linker is not supposed
1462 to know about such things, and one day it might change. In order
1463 to support old binaries that need the old behaviour however, so
1464 we attempt to detect which ABI was used to create the reloc. */
1465 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1466 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1467 || i_ehdrp->e_ident[EI_OSABI] == 0)
1468 relocation += 4;
1469 }
f21f3fe0 1470
252b5132
RH		 1471 check = relocation >> howto->rightshift;
1472
1473 /* If this is a signed value, the rightshift just dropped
1474 leading 1 bits (assuming twos complement). */
1475 if ((bfd_signed_vma) relocation >= 0)
1476 signed_check = check;
1477 else
1478 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1479
252b5132 1480 /* Assumes two's complement. */
ba96a88f 1481 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
252b5132
RH		 1482 overflow = true;
1483
1484 /* Put RELOCATION back into the insn. */
1485 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1486 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1487
df425bc0 1488#ifndef OLD_ARM_ABI
4f3c3dbb
NC		 1489 if (r_type == R_ARM_THM_XPC22
1490 && ((lower_insn & 0x1800) == 0x0800))
1491 /* Remove bit zero of the adjusted offset. Bit zero can only be
1492 set if the upper insn is at a half-word boundary, since the
1493 destination address, an ARM instruction, must always be on a
1494 word boundary. The semantics of the BLX (1) instruction, however,
1495 are that bit zero in the offset must always be zero, and the
1496 corresponding bit one in the target address will be set from bit
1497 one of the source address. */
1498 lower_insn &= ~1;
99e4ae17 1499#endif
252b5132
RH		 1500 /* Put the relocated value back in the object file: */
1501 bfd_put_16 (input_bfd, upper_insn, hit_data);
1502 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1503
1504 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1505 }
1506 break;
1507
1508 case R_ARM_GNU_VTINHERIT:
1509 case R_ARM_GNU_VTENTRY:
1510 return bfd_reloc_ok;
1511
1512 case R_ARM_COPY:
1513 return bfd_reloc_notsupported;
1514
1515 case R_ARM_GLOB_DAT:
1516 return bfd_reloc_notsupported;
1517
1518 case R_ARM_JUMP_SLOT:
1519 return bfd_reloc_notsupported;
1520
1521 case R_ARM_RELATIVE:
1522 return bfd_reloc_notsupported;
1523
1524 case R_ARM_GOTOFF:
1525 /* Relocation is relative to the start of the
1526 global offset table. */
1527
1528 BFD_ASSERT (sgot != NULL);
1529 if (sgot == NULL)
1530 return bfd_reloc_notsupported;
9a5aca8c 1531
252b5132
RH		 1532 /* Note that sgot->output_offset is not involved in this
1533 calculation. We always want the start of .got. If we
1534 define _GLOBAL_OFFSET_TABLE in a different way, as is
1535 permitted by the ABI, we might have to change this
9b485d32 1536 calculation. */
252b5132 1537 value -= sgot->output_section->vma;
f21f3fe0 1538 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1539 contents, rel->r_offset, value,
1540 (bfd_vma) 0);
252b5132
RH		 1541
1542 case R_ARM_GOTPC:
a7c10850 1543 /* Use global offset table as symbol value. */
252b5132 1544 BFD_ASSERT (sgot != NULL);
f21f3fe0 1545
252b5132
RH		 1546 if (sgot == NULL)
1547 return bfd_reloc_notsupported;
1548
1549 value = sgot->output_section->vma;
f21f3fe0 1550 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1551 contents, rel->r_offset, value,
1552 (bfd_vma) 0);
f21f3fe0 1553
252b5132
RH		 1554 case R_ARM_GOT32:
1555 /* Relocation is to the entry for this symbol in the
9b485d32 1556 global offset table. */
252b5132
RH		 1557 if (sgot == NULL)
1558 return bfd_reloc_notsupported;
f21f3fe0 1559
252b5132
RH		 1560 if (h != NULL)
1561 {
1562 bfd_vma off;
f21f3fe0 1563
252b5132
RH		 1564 off = h->got.offset;
1565 BFD_ASSERT (off != (bfd_vma) -1);
f21f3fe0 1566
252b5132
RH		 1567 if (!elf_hash_table (info)->dynamic_sections_created ||
1568 (info->shared && (info->symbolic || h->dynindx == -1)
1569 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1570 {
1571 /* This is actually a static link, or it is a -Bsymbolic link
1572 and the symbol is defined locally. We must initialize this
1573 entry in the global offset table. Since the offset must
1574 always be a multiple of 4, we use the least significant bit
1575 to record whether we have initialized it already.
f21f3fe0 1576
252b5132 1577 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1578 entry to initialize the value. This is done in the
9b485d32 1579 finish_dynamic_symbol routine. */
252b5132
RH		 1580 if ((off & 1) != 0)
1581 off &= ~1;
1582 else
1583 {
1584 bfd_put_32 (output_bfd, value, sgot->contents + off);
1585 h->got.offset |= 1;
1586 }
1587 }
f21f3fe0 1588
252b5132
RH		 1589 value = sgot->output_offset + off;
1590 }
1591 else
1592 {
1593 bfd_vma off;
f21f3fe0 1594
252b5132
RH		 1595 BFD_ASSERT (local_got_offsets != NULL &&
1596 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1597
252b5132 1598 off = local_got_offsets[r_symndx];
f21f3fe0 1599
252b5132
RH		 1600 /* The offset must always be a multiple of 4. We use the
1601 least significant bit to record whether we have already
9b485d32 1602 generated the necessary reloc. */
252b5132
RH		 1603 if ((off & 1) != 0)
1604 off &= ~1;
1605 else
1606 {
1607 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1608
252b5132
RH		 1609 if (info->shared)
1610 {
1611 asection * srelgot;
1612 Elf_Internal_Rel outrel;
f21f3fe0 1613
252b5132
RH		 1614 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1615 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1616
252b5132 1617 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1618 + sgot->output_offset
252b5132
RH		 1619 + off);
1620 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1621 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1622 (((Elf32_External_Rel *)
1623 srelgot->contents)
1624 + srelgot->reloc_count));
1625 ++srelgot->reloc_count;
1626 }
f21f3fe0 1627
252b5132
RH		 1628 local_got_offsets[r_symndx] |= 1;
1629 }
f21f3fe0 1630
252b5132
RH		 1631 value = sgot->output_offset + off;
1632 }
9a5aca8c 1633
f21f3fe0 1634 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1635 contents, rel->r_offset, value,
1636 (bfd_vma) 0);
f21f3fe0 1637
252b5132
RH		 1638 case R_ARM_PLT32:
1639 /* Relocation is to the entry for this symbol in the
1640 procedure linkage table. */
1641
1642 /* Resolve a PLT32 reloc against a local symbol directly,
9b485d32 1643 without using the procedure linkage table. */
252b5132
RH		 1644 if (h == NULL)
1645 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1646 contents, rel->r_offset, value,
1647 (bfd_vma) 0);
252b5132
RH		 1648
1649 if (h->plt.offset == (bfd_vma) -1)
1650 /* We didn't make a PLT entry for this symbol. This
1651 happens when statically linking PIC code, or when
1652 using -Bsymbolic. */
1653 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1654 contents, rel->r_offset, value,
1655 (bfd_vma) 0);
1656
1657 BFD_ASSERT(splt != NULL);
1658 if (splt == NULL)
1659 return bfd_reloc_notsupported;
1660
1661 value = (splt->output_section->vma
1662 + splt->output_offset
1663 + h->plt.offset);
1664 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1665 contents, rel->r_offset, value,
1666 (bfd_vma) 0);
f21f3fe0 1667
252b5132
RH		 1668 case R_ARM_SBREL32:
1669 return bfd_reloc_notsupported;
1670
1671 case R_ARM_AMP_VCALL9:
1672 return bfd_reloc_notsupported;
1673
1674 case R_ARM_RSBREL32:
1675 return bfd_reloc_notsupported;
1676
1677 case R_ARM_THM_RPC22:
1678 return bfd_reloc_notsupported;
1679
1680 case R_ARM_RREL32:
1681 return bfd_reloc_notsupported;
1682
1683 case R_ARM_RABS32:
1684 return bfd_reloc_notsupported;
1685
1686 case R_ARM_RPC24:
1687 return bfd_reloc_notsupported;
1688
1689 case R_ARM_RBASE:
1690 return bfd_reloc_notsupported;
1691
1692 default:
1693 return bfd_reloc_notsupported;
1694 }
1695}
1696
98c1d4aa
NC		 1697#ifdef USE_REL
1698/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1699static void
1700arm_add_to_rel (abfd, address, howto, increment)
1701 bfd * abfd;
59f2c4e7 1702 bfd_byte * address;
98c1d4aa
NC		 1703 reloc_howto_type * howto;
1704 bfd_signed_vma increment;
1705{
98c1d4aa
NC		 1706 bfd_signed_vma addend;
1707
9a5aca8c 1708 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 1709 {
9a5aca8c
AM		 1710 int upper_insn, lower_insn;
1711 int upper, lower;
98c1d4aa 1712
9a5aca8c
AM		 1713 upper_insn = bfd_get_16 (abfd, address);
1714 lower_insn = bfd_get_16 (abfd, address + 2);
1715 upper = upper_insn & 0x7ff;
1716 lower = lower_insn & 0x7ff;
1717
1718 addend = (upper << 12) | (lower << 1);
ddda4409 1719 addend += increment;
9a5aca8c 1720 addend >>= 1;
98c1d4aa 1721
9a5aca8c
AM		 1722 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1723 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1724
1725 bfd_put_16 (abfd, upper_insn, address);
1726 bfd_put_16 (abfd, lower_insn, address + 2);
1727 }
1728 else
1729 {
1730 bfd_vma contents;
1731
1732 contents = bfd_get_32 (abfd, address);
1733
1734 /* Get the (signed) value from the instruction. */
1735 addend = contents & howto->src_mask;
1736 if (addend & ((howto->src_mask + 1) >> 1))
1737 {
1738 bfd_signed_vma mask;
1739
1740 mask = -1;
1741 mask &= ~ howto->src_mask;
1742 addend |= mask;
1743 }
1744
1745 /* Add in the increment, (which is a byte value). */
1746 switch (howto->type)
1747 {
1748 default:
1749 addend += increment;
1750 break;
1751
1752 case R_ARM_PC24:
1753 addend <<= howto->size;
1754 addend += increment;
1755
1756 /* Should we check for overflow here ? */
1757
1758 /* Drop any undesired bits. */
1759 addend >>= howto->rightshift;
1760 break;
1761 }
1762
1763 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1764
1765 bfd_put_32 (abfd, contents, address);
ddda4409 1766 }
98c1d4aa
NC		 1767}
1768#endif /* USE_REL */
252b5132
RH		 1769
1770/* Relocate an ARM ELF section. */
1771static boolean
1772elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1773 contents, relocs, local_syms, local_sections)
1774 bfd * output_bfd;
1775 struct bfd_link_info * info;
1776 bfd * input_bfd;
1777 asection * input_section;
1778 bfd_byte * contents;
1779 Elf_Internal_Rela * relocs;
1780 Elf_Internal_Sym * local_syms;
1781 asection ** local_sections;
1782{
1783 Elf_Internal_Shdr * symtab_hdr;
1784 struct elf_link_hash_entry ** sym_hashes;
1785 Elf_Internal_Rela * rel;
1786 Elf_Internal_Rela * relend;
1787 const char * name;
1788
1789 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1790 sym_hashes = elf_sym_hashes (input_bfd);
1791
1792 rel = relocs;
1793 relend = relocs + input_section->reloc_count;
1794 for (; rel < relend; rel++)
1795 {
ba96a88f
NC		 1796 int r_type;
1797 reloc_howto_type * howto;
1798 unsigned long r_symndx;
1799 Elf_Internal_Sym * sym;
1800 asection * sec;
252b5132 1801 struct elf_link_hash_entry * h;
ba96a88f
NC		 1802 bfd_vma relocation;
1803 bfd_reloc_status_type r;
1804 arelent bfd_reloc;
f21f3fe0 1805
252b5132 1806 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 1807 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1808
ba96a88f
NC		 1809 if ( r_type == R_ARM_GNU_VTENTRY
1810 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 1811 continue;
1812
ba96a88f
NC		 1813 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1814 howto = bfd_reloc.howto;
252b5132
RH		 1815
1816 if (info->relocateable)
1817 {
1818 /* This is a relocateable link. We don't have to change
1819 anything, unless the reloc is against a section symbol,
1820 in which case we have to adjust according to where the
1821 section symbol winds up in the output section. */
1822 if (r_symndx < symtab_hdr->sh_info)
1823 {
1824 sym = local_syms + r_symndx;
1825 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1826 {
1827 sec = local_sections[r_symndx];
1828#ifdef USE_REL
98c1d4aa
NC		 1829 arm_add_to_rel (input_bfd, contents + rel->r_offset,
1830 howto, sec->output_offset + sym->st_value);
252b5132
RH		 1831#else
1832 rel->r_addend += (sec->output_offset + sym->st_value)
1833 >> howto->rightshift;
1834#endif
1835 }
1836 }
1837
1838 continue;
1839 }
1840
1841 /* This is a final link. */
1842 h = NULL;
1843 sym = NULL;
1844 sec = NULL;
9b485d32 1845
252b5132
RH		 1846 if (r_symndx < symtab_hdr->sh_info)
1847 {
1848 sym = local_syms + r_symndx;
1849 sec = local_sections[r_symndx];
1850 relocation = (sec->output_section->vma
1851 + sec->output_offset
1852 + sym->st_value);
1853 }
1854 else
1855 {
1856 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9b485d32
NC		 1857
1858 while ( h->root.type == bfd_link_hash_indirect
252b5132
RH		 1859 || h->root.type == bfd_link_hash_warning)
1860 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9b485d32
NC		 1861
1862 if ( h->root.type == bfd_link_hash_defined
252b5132
RH		 1863 || h->root.type == bfd_link_hash_defweak)
1864 {
780a67af 1865 int relocation_needed = 1;
f21f3fe0 1866
780a67af 1867 sec = h->root.u.def.section;
f21f3fe0 1868
252b5132 1869 /* In these cases, we don't need the relocation value.
f21f3fe0 1870 We check specially because in some obscure cases
9b485d32 1871 sec->output_section will be NULL. */
252b5132
RH		 1872 switch (r_type)
1873 {
1874 case R_ARM_PC24:
1875 case R_ARM_ABS32:
1876 if (info->shared
1877 && (
99e4ae17 1878 (!info->symbolic && h->dynindx != -1)
97eaf9de 1879 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132 1880 )
05924f36
PB		 1881 && ((input_section->flags & SEC_ALLOC) != 0
1882 /* DWARF will emit R_ARM_ABS32 relocations in its
1883 sections against symbols defined externally
1884 in shared libraries. We can't do anything
1885 with them here. */
1886 || ((input_section->flags & SEC_DEBUGGING) != 0
1887 && (h->elf_link_hash_flags
1888 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132 1889 )
780a67af 1890 relocation_needed = 0;
252b5132 1891 break;
f21f3fe0 1892
252b5132 1893 case R_ARM_GOTPC:
780a67af 1894 relocation_needed = 0;
252b5132 1895 break;
f21f3fe0 1896
252b5132
RH		 1897 case R_ARM_GOT32:
1898 if (elf_hash_table(info)->dynamic_sections_created
1899 && (!info->shared
1900 || (!info->symbolic && h->dynindx != -1)
1901 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1902 )
1903 )
780a67af 1904 relocation_needed = 0;
252b5132 1905 break;
f21f3fe0 1906
252b5132
RH		 1907 case R_ARM_PLT32:
1908 if (h->plt.offset != (bfd_vma)-1)
780a67af 1909 relocation_needed = 0;
252b5132 1910 break;
f21f3fe0 1911
252b5132
RH		 1912 default:
1913 if (sec->output_section == NULL)
1914 {
1915 (*_bfd_error_handler)
1916 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1917 bfd_get_filename (input_bfd), h->root.root.string,
1918 bfd_get_section_name (input_bfd, input_section));
780a67af 1919 relocation_needed = 0;
252b5132
RH		 1920 }
1921 }
780a67af
NC		 1922
1923 if (relocation_needed)
1924 relocation = h->root.u.def.value
1925 + sec->output_section->vma
1926 + sec->output_offset;
1927 else
1928 relocation = 0;
252b5132
RH		 1929 }
1930 else if (h->root.type == bfd_link_hash_undefweak)
1931 relocation = 0;
3a27a730
L		 1932 else if (info->shared && !info->symbolic
1933 && !info->no_undefined
1934 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
a72747a3 1935 relocation = 0;
252b5132
RH		 1936 else
1937 {
1938 if (!((*info->callbacks->undefined_symbol)
1939 (info, h->root.root.string, input_bfd,
5cc7c785 1940 input_section, rel->r_offset,
3a27a730
L		 1941 (!info->shared || info->no_undefined
1942 || ELF_ST_VISIBILITY (h->other)))))
252b5132
RH		 1943 return false;
1944 relocation = 0;
1945 }
1946 }
1947
1948 if (h != NULL)
1949 name = h->root.root.string;
1950 else
1951 {
1952 name = (bfd_elf_string_from_elf_section
1953 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1954 if (name == NULL || *name == '\0')
1955 name = bfd_section_name (input_bfd, sec);
1956 }
f21f3fe0 1957
252b5132
RH		 1958 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1959 input_section, contents, rel,
1960 relocation, info, sec, name,
1961 (h ? ELF_ST_TYPE (h->type) :
780a67af 1962 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH		 1963
1964 if (r != bfd_reloc_ok)
1965 {
1966 const char * msg = (const char *) 0;
1967
1968 switch (r)
1969 {
1970 case bfd_reloc_overflow:
cf919dfd
PB		 1971 /* If the overflowing reloc was to an undefined symbol,
1972 we have already printed one error message and there
1973 is no point complaining again. */
1974 if ((! h ||
1975 h->root.type != bfd_link_hash_undefined)
1976 && (!((*info->callbacks->reloc_overflow)
1977 (info, name, howto->name, (bfd_vma) 0,
1978 input_bfd, input_section, rel->r_offset))))
1979 return false;
252b5132
RH		 1980 break;
1981
1982 case bfd_reloc_undefined:
1983 if (!((*info->callbacks->undefined_symbol)
1984 (info, name, input_bfd, input_section,
5cc7c785 1985 rel->r_offset, true)))
252b5132
RH		 1986 return false;
1987 break;
1988
1989 case bfd_reloc_outofrange:
9b485d32 1990 msg = _("internal error: out of range error");
252b5132
RH		 1991 goto common_error;
1992
1993 case bfd_reloc_notsupported:
9b485d32 1994 msg = _("internal error: unsupported relocation error");
252b5132
RH		 1995 goto common_error;
1996
1997 case bfd_reloc_dangerous:
9b485d32 1998 msg = _("internal error: dangerous error");
252b5132
RH		 1999 goto common_error;
2000
2001 default:
9b485d32 2002 msg = _("internal error: unknown error");
252b5132
RH		 2003 /* fall through */
2004
2005 common_error:
2006 if (!((*info->callbacks->warning)
2007 (info, msg, name, input_bfd, input_section,
2008 rel->r_offset)))
2009 return false;
2010 break;
2011 }
2012 }
2013 }
2014
2015 return true;
2016}
2017
fc830a83 2018/* Function to keep ARM specific flags in the ELF header. */
252b5132
RH		 2019static boolean
2020elf32_arm_set_private_flags (abfd, flags)
2021 bfd *abfd;
2022 flagword flags;
2023{
2024 if (elf_flags_init (abfd)
2025 && elf_elfheader (abfd)->e_flags != flags)
2026 {
fc830a83
NC		 2027 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2028 {
fd2ec330 2029 if (flags & EF_ARM_INTERWORK)
9b485d32 2030 _bfd_error_handler (_("\
252b5132 2031Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
fc830a83
NC		 2032 bfd_get_filename (abfd));
2033 else
9b485d32 2034 _bfd_error_handler (_("\
252b5132 2035Warning: Clearing the interwork flag of %s due to outside request"),
fc830a83
NC		 2036 bfd_get_filename (abfd));
2037 }
252b5132
RH		 2038 }
2039 else
2040 {
2041 elf_elfheader (abfd)->e_flags = flags;
2042 elf_flags_init (abfd) = true;
2043 }
2044
2045 return true;
2046}
2047
fc830a83 2048/* Copy backend specific data from one object module to another. */
9b485d32 2049
252b5132
RH		 2050static boolean
2051elf32_arm_copy_private_bfd_data (ibfd, obfd)
2052 bfd *ibfd;
2053 bfd *obfd;
2054{
2055 flagword in_flags;
2056 flagword out_flags;
2057
fc830a83 2058 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132
RH		 2059 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2060 return true;
2061
fc830a83 2062 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH		 2063 out_flags = elf_elfheader (obfd)->e_flags;
2064
fc830a83
NC		 2065 if (elf_flags_init (obfd)
2066 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2067 && in_flags != out_flags)
252b5132 2068 {
252b5132 2069 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 2070 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
252b5132
RH		 2071 return false;
2072
2073 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 2074 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
252b5132
RH		 2075 return false;
2076
2077 /* If the src and dest have different interworking flags
2078 then turn off the interworking bit. */
fd2ec330 2079 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 2080 {
fd2ec330 2081 if (out_flags & EF_ARM_INTERWORK)
9b485d32 2082 _bfd_error_handler (_("\
252b5132
RH		 2083Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
2084 bfd_get_filename (obfd), bfd_get_filename (ibfd));
2085
fd2ec330 2086 in_flags &= ~EF_ARM_INTERWORK;
252b5132 2087 }
1006ba19
PB		 2088
2089 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB		 2090 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2091 in_flags &= ~EF_ARM_PIC;
252b5132
RH		 2092 }
2093
2094 elf_elfheader (obfd)->e_flags = in_flags;
2095 elf_flags_init (obfd) = true;
2096
2097 return true;
2098}
2099
2100/* Merge backend specific data from an object file to the output
2101 object file when linking. */
9b485d32 2102
252b5132
RH		 2103static boolean
2104elf32_arm_merge_private_bfd_data (ibfd, obfd)
fc830a83
NC		 2105 bfd * ibfd;
2106 bfd * obfd;
252b5132
RH		 2107{
2108 flagword out_flags;
2109 flagword in_flags;
1006ba19 2110 boolean flags_compatible = true;
cf919dfd
PB		 2111 boolean null_input_bfd = true;
2112 asection *sec;
252b5132 2113
9b485d32 2114 /* Check if we have the same endianess. */
1fe494a5
NC		 2115 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2116 return false;
2117
252b5132
RH		 2118 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2119 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2120 return true;
2121
252b5132
RH		 2122 /* The input BFD must have had its flags initialised. */
2123 /* The following seems bogus to me -- The flags are initialized in
2124 the assembler but I don't think an elf_flags_init field is
9b485d32 2125 written into the object. */
252b5132
RH		 2126 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2127
2128 in_flags = elf_elfheader (ibfd)->e_flags;
2129 out_flags = elf_elfheader (obfd)->e_flags;
2130
2131 if (!elf_flags_init (obfd))
2132 {
fe077fa6
NC		 2133 /* If the input is the default architecture and had the default
2134 flags then do not bother setting the flags for the output
2135 architecture, instead allow future merges to do this. If no
2136 future merges ever set these flags then they will retain their
2137 uninitialised values, which surprise surprise, correspond
252b5132 2138 to the default values. */
fe077fa6
NC		 2139 if (bfd_get_arch_info (ibfd)->the_default
2140 && elf_elfheader (ibfd)->e_flags == 0)
252b5132
RH		 2141 return true;
2142
2143 elf_flags_init (obfd) = true;
2144 elf_elfheader (obfd)->e_flags = in_flags;
2145
2146 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2147 && bfd_get_arch_info (obfd)->the_default)
2148 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2149
2150 return true;
2151 }
2152
1006ba19 2153 /* Identical flags must be compatible. */
252b5132
RH		 2154 if (in_flags == out_flags)
2155 return true;
2156
cf919dfd
PB		 2157 /* Check to see if the input BFD actually contains any sections.
2158 If not, its flags may not have been initialised either, but it cannot
2159 actually cause any incompatibility. */
2160 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2161 {
2162 /* Ignore synthetic glue sections. */
2163 if (strcmp (sec->name, ".glue_7")
2164 && strcmp (sec->name, ".glue_7t"))
2165 {
2166 null_input_bfd = false;
2167 break;
2168 }
2169 }
2170 if (null_input_bfd)
2171 return true;
2172
252b5132 2173 /* Complain about various flag mismatches. */
fc830a83
NC		 2174 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2175 {
2176 _bfd_error_handler (_("\
2177Error: %s compiled for EABI version %d, whereas %s is compiled for version %d"),
2178 bfd_get_filename (ibfd),
2179 (in_flags & EF_ARM_EABIMASK) >> 24,
2180 bfd_get_filename (obfd),
2181 (out_flags & EF_ARM_EABIMASK) >> 24);
1006ba19 2182 return false;
fc830a83 2183 }
252b5132 2184
1006ba19
PB		 2185 /* Not sure what needs to be checked for EABI versions >= 1. */
2186 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2187 {
fd2ec330 2188 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19
PB		 2189 {
2190 _bfd_error_handler (_("\
252b5132
RH		 2191Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
2192 bfd_get_filename (ibfd),
fd2ec330 2193 in_flags & EF_ARM_APCS_26 ? 26 : 32,
252b5132 2194 bfd_get_filename (obfd),
fd2ec330 2195 out_flags & EF_ARM_APCS_26 ? 26 : 32);
1006ba19
PB		 2196 flags_compatible = false;
2197 }
252b5132 2198
fd2ec330 2199 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19
PB		 2200 {
2201 _bfd_error_handler (_("\
252b5132
RH		 2202Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
2203 bfd_get_filename (ibfd),
fd2ec330 2204 in_flags & EF_ARM_APCS_FLOAT ? _("float") : _("integer"),
252b5132 2205 bfd_get_filename (obfd),
fd2ec330 2206 out_flags & EF_ARM_APCS_26 ? _("float") : _("integer"));
1006ba19
PB		 2207 flags_compatible = false;
2208 }
252b5132 2209
fd2ec330
PB		 2210#ifdef EF_ARM_SOFT_FLOAT
2211 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
1006ba19
PB		 2212 {
2213 _bfd_error_handler (_ ("\
2214Error: %s uses %s floating point, whereas %s uses %s floating point"),
2215 bfd_get_filename (ibfd),
fd2ec330 2216 in_flags & EF_ARM_SOFT_FLOAT ? _("soft") : _("hard"),
1006ba19 2217 bfd_get_filename (obfd),
fd2ec330 2218 out_flags & EF_ARM_SOFT_FLOAT ? _("soft") : _("hard"));
1006ba19
PB		 2219 flags_compatible = false;
2220 }
ee43f35e 2221#endif
252b5132 2222
1006ba19 2223 /* Interworking mismatch is only a warning. */
fd2ec330 2224 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
1006ba19 2225 _bfd_error_handler (_("\
252b5132 2226Warning: %s %s interworking, whereas %s %s"),
d1659392
NC		 2227 bfd_get_filename (ibfd),
2228 in_flags & EF_ARM_INTERWORK ? _("supports") : _("does not support"),
2229 bfd_get_filename (obfd),
2230 out_flags & EF_ARM_INTERWORK ? _("does") : _("does not"));
252b5132
RH		 2231 }
2232
1006ba19 2233 return flags_compatible;
252b5132
RH		 2234}
2235
9b485d32
NC		 2236/* Display the flags field. */
2237
252b5132
RH		 2238static boolean
2239elf32_arm_print_private_bfd_data (abfd, ptr)
2240 bfd *abfd;
2241 PTR ptr;
2242{
fc830a83
NC		 2243 FILE * file = (FILE *) ptr;
2244 unsigned long flags;
252b5132
RH		 2245
2246 BFD_ASSERT (abfd != NULL && ptr != NULL);
2247
2248 /* Print normal ELF private data. */
2249 _bfd_elf_print_private_bfd_data (abfd, ptr);
2250
fc830a83 2251 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC		 2252 /* Ignore init flag - it may not be set, despite the flags field
2253 containing valid data. */
252b5132
RH		 2254
2255 /* xgettext:c-format */
9b485d32 2256 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 2257
fc830a83
NC		 2258 switch (EF_ARM_EABI_VERSION (flags))
2259 {
2260 case EF_ARM_EABI_UNKNOWN:
2261 /* The following flag bits are GNU extenstions and not part of the
2262 official ARM ELF extended ABI. Hence they are only decoded if
2263 the EABI version is not set. */
fd2ec330 2264 if (flags & EF_ARM_INTERWORK)
9b485d32 2265 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 2266
fd2ec330 2267 if (flags & EF_ARM_APCS_26)
9b485d32 2268 fprintf (file, _(" [APCS-26]"));
fc830a83 2269 else
9b485d32 2270 fprintf (file, _(" [APCS-32]"));
9a5aca8c 2271
fd2ec330 2272 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 2273 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 2274
fd2ec330 2275 if (flags & EF_ARM_PIC)
9b485d32 2276 fprintf (file, _(" [position independent]"));
fc830a83 2277
fd2ec330 2278 if (flags & EF_ARM_NEW_ABI)
9b485d32 2279 fprintf (file, _(" [new ABI]"));
9a5aca8c 2280
fd2ec330 2281 if (flags & EF_ARM_OLD_ABI)
9b485d32 2282 fprintf (file, _(" [old ABI]"));
9a5aca8c 2283
fd2ec330 2284 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 2285 fprintf (file, _(" [software FP]"));
9a5aca8c 2286
fd2ec330
PB		 2287 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT | EF_ARM_PIC
2288 | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | EF_ARM_SOFT_FLOAT);
fc830a83 2289 break;
9a5aca8c 2290
fc830a83 2291 case EF_ARM_EABI_VER1:
9b485d32 2292 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 2293
fc830a83 2294 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 2295 fprintf (file, _(" [sorted symbol table]"));
fc830a83 2296 else
9b485d32 2297 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 2298
fc830a83
NC		 2299 flags &= ~ EF_ARM_SYMSARESORTED;
2300 break;
9a5aca8c 2301
fd2ec330
PB		 2302 case EF_ARM_EABI_VER2:
2303 fprintf (file, _(" [Version2 EABI]"));
2304
2305 if (flags & EF_ARM_SYMSARESORTED)
2306 fprintf (file, _(" [sorted symbol table]"));
2307 else
2308 fprintf (file, _(" [unsorted symbol table]"));
2309
2310 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2311 fprintf (file, _(" [dynamic symbols use segment index]"));
2312
2313 if (flags & EF_ARM_MAPSYMSFIRST)
2314 fprintf (file, _(" [mapping symbols precede others]"));
2315
99e4ae17 2316 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB		 2317 | EF_ARM_MAPSYMSFIRST);
2318 break;
2319
fc830a83 2320 default:
9b485d32 2321 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC		 2322 break;
2323 }
252b5132 2324
fc830a83 2325 flags &= ~ EF_ARM_EABIMASK;
252b5132 2326
fc830a83 2327 if (flags & EF_ARM_RELEXEC)
9b485d32 2328 fprintf (file, _(" [relocatable executable]"));
252b5132 2329
fc830a83 2330 if (flags & EF_ARM_HASENTRY)
9b485d32 2331 fprintf (file, _(" [has entry point]"));
252b5132 2332
fc830a83
NC		 2333 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2334
2335 if (flags)
9b485d32 2336 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 2337
252b5132
RH		 2338 fputc ('\n', file);
2339
2340 return true;
2341}
2342
2343static int
2344elf32_arm_get_symbol_type (elf_sym, type)
2345 Elf_Internal_Sym * elf_sym;
2346 int type;
2347{
2f0ca46a
NC		 2348 switch (ELF_ST_TYPE (elf_sym->st_info))
2349 {
2350 case STT_ARM_TFUNC:
2351 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 2352
2f0ca46a
NC		 2353 case STT_ARM_16BIT:
2354 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2355 This allows us to distinguish between data used by Thumb instructions
2356 and non-data (which is probably code) inside Thumb regions of an
2357 executable. */
2358 if (type != STT_OBJECT)
2359 return ELF_ST_TYPE (elf_sym->st_info);
2360 break;
9a5aca8c 2361
ce855c42
NC		 2362 default:
2363 break;
2f0ca46a
NC		 2364 }
2365
2366 return type;
252b5132 2367}
f21f3fe0 2368
252b5132
RH		 2369static asection *
2370elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2371 bfd *abfd;
5f771d47 2372 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2373 Elf_Internal_Rela *rel;
2374 struct elf_link_hash_entry *h;
2375 Elf_Internal_Sym *sym;
2376{
2377 if (h != NULL)
2378 {
2379 switch (ELF32_R_TYPE (rel->r_info))
2380 {
2381 case R_ARM_GNU_VTINHERIT:
2382 case R_ARM_GNU_VTENTRY:
2383 break;
2384
2385 default:
2386 switch (h->root.type)
2387 {
2388 case bfd_link_hash_defined:
2389 case bfd_link_hash_defweak:
2390 return h->root.u.def.section;
2391
2392 case bfd_link_hash_common:
2393 return h->root.u.c.p->section;
e049a0de
ILT		 2394
2395 default:
2396 break;
252b5132
RH		 2397 }
2398 }
2399 }
2400 else
2401 {
2402 if (!(elf_bad_symtab (abfd)
2403 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
2404 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
2405 && sym->st_shndx != SHN_COMMON))
2406 {
2407 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2408 }
2409 }
2410 return NULL;
2411}
2412
780a67af
NC		 2413/* Update the got entry reference counts for the section being removed. */
2414
252b5132
RH		 2415static boolean
2416elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 2417 bfd *abfd ATTRIBUTE_UNUSED;
2418 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2419 asection *sec ATTRIBUTE_UNUSED;
2420 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2421{
780a67af 2422 /* We don't support garbage collection of GOT and PLT relocs yet. */
252b5132
RH		 2423 return true;
2424}
2425
780a67af
NC		 2426/* Look through the relocs for a section during the first phase. */
2427
252b5132
RH		 2428static boolean
2429elf32_arm_check_relocs (abfd, info, sec, relocs)
2430 bfd * abfd;
2431 struct bfd_link_info * info;
2432 asection * sec;
2433 const Elf_Internal_Rela * relocs;
2434{
2435 Elf_Internal_Shdr * symtab_hdr;
2436 struct elf_link_hash_entry ** sym_hashes;
2437 struct elf_link_hash_entry ** sym_hashes_end;
2438 const Elf_Internal_Rela * rel;
2439 const Elf_Internal_Rela * rel_end;
2440 bfd * dynobj;
2441 asection * sgot, *srelgot, *sreloc;
2442 bfd_vma * local_got_offsets;
9a5aca8c 2443
252b5132
RH		 2444 if (info->relocateable)
2445 return true;
9a5aca8c 2446
252b5132 2447 sgot = srelgot = sreloc = NULL;
9a5aca8c 2448
252b5132
RH		 2449 dynobj = elf_hash_table (info)->dynobj;
2450 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2451
252b5132
RH		 2452 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2453 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC		 2454 sym_hashes_end = sym_hashes
2455 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2456
252b5132
RH		 2457 if (!elf_bad_symtab (abfd))
2458 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 2459
252b5132
RH		 2460 rel_end = relocs + sec->reloc_count;
2461 for (rel = relocs; rel < rel_end; rel++)
2462 {
2463 struct elf_link_hash_entry *h;
2464 unsigned long r_symndx;
9a5aca8c 2465
252b5132
RH		 2466 r_symndx = ELF32_R_SYM (rel->r_info);
2467 if (r_symndx < symtab_hdr->sh_info)
2468 h = NULL;
2469 else
2470 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 2471
252b5132
RH		 2472 /* Some relocs require a global offset table. */
2473 if (dynobj == NULL)
2474 {
2475 switch (ELF32_R_TYPE (rel->r_info))
2476 {
2477 case R_ARM_GOT32:
2478 case R_ARM_GOTOFF:
2479 case R_ARM_GOTPC:
2480 elf_hash_table (info)->dynobj = dynobj = abfd;
2481 if (! _bfd_elf_create_got_section (dynobj, info))
2482 return false;
2483 break;
2484
2485 default:
2486 break;
2487 }
2488 }
2489
2490 switch (ELF32_R_TYPE (rel->r_info))
2491 {
2492 case R_ARM_GOT32:
2493 /* This symbol requires a global offset table entry. */
2494 if (sgot == NULL)
2495 {
2496 sgot = bfd_get_section_by_name (dynobj, ".got");
2497 BFD_ASSERT (sgot != NULL);
2498 }
2499
2500 /* Get the got relocation section if necessary. */
2501 if (srelgot == NULL
2502 && (h != NULL || info->shared))
2503 {
2504 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
9a5aca8c 2505
252b5132
RH		 2506 /* If no got relocation section, make one and initialize. */
2507 if (srelgot == NULL)
2508 {
2509 srelgot = bfd_make_section (dynobj, ".rel.got");
2510 if (srelgot == NULL
2511 || ! bfd_set_section_flags (dynobj, srelgot,
99e4ae17 2512 (SEC_ALLOC
252b5132
RH		 2513 | SEC_LOAD
2514 | SEC_HAS_CONTENTS
2515 | SEC_IN_MEMORY
2516 | SEC_LINKER_CREATED
2517 | SEC_READONLY))
2518 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2519 return false;
2520 }
2521 }
2522
2523 if (h != NULL)
2524 {
2525 if (h->got.offset != (bfd_vma) -1)
2526 /* We have already allocated space in the .got. */
2527 break;
f21f3fe0 2528
252b5132
RH		 2529 h->got.offset = sgot->_raw_size;
2530
2531 /* Make sure this symbol is output as a dynamic symbol. */
2532 if (h->dynindx == -1)
2533 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2534 return false;
2535
2536 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2537 }
2538 else
2539 {
99e4ae17 2540 /* This is a global offset table entry for a local
252b5132
RH		 2541 symbol. */
2542 if (local_got_offsets == NULL)
2543 {
2544 size_t size;
2545 register unsigned int i;
2546
2547 size = symtab_hdr->sh_info * sizeof (bfd_vma);
2548 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2549 if (local_got_offsets == NULL)
2550 return false;
2551 elf_local_got_offsets (abfd) = local_got_offsets;
2552 for (i = 0; i < symtab_hdr->sh_info; i++)
2553 local_got_offsets[i] = (bfd_vma) -1;
2554 }
f21f3fe0 2555
252b5132
RH		 2556 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2557 /* We have already allocated space in the .got. */
2558 break;
2559
2560 local_got_offsets[r_symndx] = sgot->_raw_size;
2561
2562 if (info->shared)
2563 /* If we are generating a shared object, we need to
2564 output a R_ARM_RELATIVE reloc so that the dynamic
2565 linker can adjust this GOT entry. */
2566 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2567 }
2568
2569 sgot->_raw_size += 4;
2570 break;
2571
99e4ae17 2572 case R_ARM_PLT32:
252b5132
RH		 2573 /* This symbol requires a procedure linkage table entry. We
2574 actually build the entry in adjust_dynamic_symbol,
2575 because this might be a case of linking PIC code which is
2576 never referenced by a dynamic object, in which case we
2577 don't need to generate a procedure linkage table entry
2578 after all. */
2579
2580 /* If this is a local symbol, we resolve it directly without
2581 creating a procedure linkage table entry. */
2582 if (h == NULL)
2583 continue;
2584
2585 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2586 break;
2587
2588 case R_ARM_ABS32:
2589 case R_ARM_REL32:
2590 case R_ARM_PC24:
2591 /* If we are creating a shared library, and this is a reloc
2592 against a global symbol, or a non PC relative reloc
2593 against a local symbol, then we need to copy the reloc
2594 into the shared library. However, if we are linking with
2595 -Bsymbolic, we do not need to copy a reloc against a
2596 global symbol which is defined in an object we are
2597 including in the link (i.e., DEF_REGULAR is set). At
2598 this point we have not seen all the input files, so it is
2599 possible that DEF_REGULAR is not set now but will be set
2600 later (it is never cleared). We account for that
2601 possibility below by storing information in the
2602 pcrel_relocs_copied field of the hash table entry. */
2603 if (info->shared
2604 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2605 || (h != NULL
2606 && (! info->symbolic
2607 || (h->elf_link_hash_flags
2608 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2609 {
2610 /* When creating a shared object, we must copy these
2611 reloc types into the output file. We create a reloc
2612 section in dynobj and make room for this reloc. */
2613 if (sreloc == NULL)
2614 {
2615 const char * name;
2616
2617 name = (bfd_elf_string_from_elf_section
2618 (abfd,
2619 elf_elfheader (abfd)->e_shstrndx,
2620 elf_section_data (sec)->rel_hdr.sh_name));
2621 if (name == NULL)
2622 return false;
2623
2624 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 2625 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH		 2626 name + 4) == 0);
2627
2628 sreloc = bfd_get_section_by_name (dynobj, name);
2629 if (sreloc == NULL)
2630 {
2631 flagword flags;
2632
2633 sreloc = bfd_make_section (dynobj, name);
2634 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2635 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2636 if ((sec->flags & SEC_ALLOC) != 0)
2637 flags |= SEC_ALLOC | SEC_LOAD;
2638 if (sreloc == NULL
2639 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2640 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2641 return false;
2642 }
99e4ae17
AJ		 2643 if (sec->flags & SEC_READONLY)
2644 info->flags |= DF_TEXTREL;
252b5132
RH		 2645 }
2646
2647 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2648 /* If we are linking with -Bsymbolic, and this is a
2649 global symbol, we count the number of PC relative
2650 relocations we have entered for this symbol, so that
2651 we can discard them again if the symbol is later
2652 defined by a regular object. Note that this function
2653 is only called if we are using an elf_i386 linker
2654 hash table, which means that h is really a pointer to
2655 an elf_i386_link_hash_entry. */
2656 if (h != NULL && info->symbolic
2657 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2658 {
2659 struct elf32_arm_link_hash_entry * eh;
2660 struct elf32_arm_pcrel_relocs_copied * p;
2661
2662 eh = (struct elf32_arm_link_hash_entry *) h;
2663
2664 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2665 if (p->section == sreloc)
2666 break;
2667
2668 if (p == NULL)
2669 {
2670 p = ((struct elf32_arm_pcrel_relocs_copied *)
2671 bfd_alloc (dynobj, sizeof * p));
f21f3fe0 2672
252b5132
RH		 2673 if (p == NULL)
2674 return false;
2675 p->next = eh->pcrel_relocs_copied;
2676 eh->pcrel_relocs_copied = p;
2677 p->section = sreloc;
2678 p->count = 0;
2679 }
2680
2681 ++p->count;
2682 }
2683 }
2684 break;
2685
2686 /* This relocation describes the C++ object vtable hierarchy.
2687 Reconstruct it for later use during GC. */
2688 case R_ARM_GNU_VTINHERIT:
2689 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2690 return false;
2691 break;
9a5aca8c 2692
252b5132
RH		 2693 /* This relocation describes which C++ vtable entries are actually
2694 used. Record for later use during GC. */
2695 case R_ARM_GNU_VTENTRY:
d512aa07 2696 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
252b5132
RH		 2697 return false;
2698 break;
2699 }
2700 }
f21f3fe0 2701
252b5132
RH		 2702 return true;
2703}
2704
252b5132
RH		 2705/* Find the nearest line to a particular section and offset, for error
2706 reporting. This code is a duplicate of the code in elf.c, except
9b485d32 2707 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
252b5132
RH		 2708
2709static boolean
2710elf32_arm_find_nearest_line
2711 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2712 bfd * abfd;
2713 asection * section;
2714 asymbol ** symbols;
2715 bfd_vma offset;
917583ad
NC		 2716 const char ** filename_ptr;
2717 const char ** functionname_ptr;
252b5132
RH		 2718 unsigned int * line_ptr;
2719{
2720 boolean found;
2721 const char * filename;
2722 asymbol * func;
2723 bfd_vma low_func;
2724 asymbol ** p;
2725
2726 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 2727 filename_ptr, functionname_ptr,
857ec808
NC		 2728 line_ptr, 0,
2729 &elf_tdata (abfd)->dwarf2_find_line_info))
252b5132
RH		 2730 return true;
2731
2732 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2733 &found, filename_ptr,
2734 functionname_ptr, line_ptr,
2735 &elf_tdata (abfd)->line_info))
2736 return false;
f21f3fe0 2737
252b5132
RH		 2738 if (found)
2739 return true;
2740
2741 if (symbols == NULL)
2742 return false;
2743
2744 filename = NULL;
2745 func = NULL;
2746 low_func = 0;
2747
2748 for (p = symbols; *p != NULL; p++)
2749 {
2750 elf_symbol_type *q;
2751
2752 q = (elf_symbol_type *) *p;
2753
2754 if (bfd_get_section (&q->symbol) != section)
2755 continue;
2756
2757 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2758 {
2759 default:
2760 break;
2761 case STT_FILE:
2762 filename = bfd_asymbol_name (&q->symbol);
2763 break;
2764 case STT_NOTYPE:
2765 case STT_FUNC:
2766 case STT_ARM_TFUNC:
2767 if (q->symbol.section == section
2768 && q->symbol.value >= low_func
2769 && q->symbol.value <= offset)
2770 {
2771 func = (asymbol *) q;
2772 low_func = q->symbol.value;
2773 }
2774 break;
2775 }
2776 }
2777
2778 if (func == NULL)
2779 return false;
2780
2781 *filename_ptr = filename;
2782 *functionname_ptr = bfd_asymbol_name (func);
2783 *line_ptr = 0;
f21f3fe0 2784
252b5132
RH		 2785 return true;
2786}
2787
2788/* Adjust a symbol defined by a dynamic object and referenced by a
2789 regular object. The current definition is in some section of the
2790 dynamic object, but we're not including those sections. We have to
2791 change the definition to something the rest of the link can
2792 understand. */
2793
2794static boolean
2795elf32_arm_adjust_dynamic_symbol (info, h)
2796 struct bfd_link_info * info;
2797 struct elf_link_hash_entry * h;
2798{
2799 bfd * dynobj;
2800 asection * s;
2801 unsigned int power_of_two;
2802
2803 dynobj = elf_hash_table (info)->dynobj;
2804
2805 /* Make sure we know what is going on here. */
2806 BFD_ASSERT (dynobj != NULL
2807 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2808 || h->weakdef != NULL
2809 || ((h->elf_link_hash_flags
2810 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2811 && (h->elf_link_hash_flags
2812 & ELF_LINK_HASH_REF_REGULAR) != 0
2813 && (h->elf_link_hash_flags
2814 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2815
2816 /* If this is a function, put it in the procedure linkage table. We
2817 will fill in the contents of the procedure linkage table later,
2818 when we know the address of the .got section. */
2819 if (h->type == STT_FUNC
2820 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2821 {
2822 if (! info->shared
2823 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2824 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2825 {
2826 /* This case can occur if we saw a PLT32 reloc in an input
2827 file, but the symbol was never referred to by a dynamic
2828 object. In such a case, we don't actually need to build
2829 a procedure linkage table, and we can just do a PC32
2830 reloc instead. */
2831 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2832 return true;
2833 }
2834
2835 /* Make sure this symbol is output as a dynamic symbol. */
2836 if (h->dynindx == -1)
2837 {
2838 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2839 return false;
2840 }
2841
2842 s = bfd_get_section_by_name (dynobj, ".plt");
2843 BFD_ASSERT (s != NULL);
2844
2845 /* If this is the first .plt entry, make room for the special
2846 first entry. */
2847 if (s->_raw_size == 0)
2848 s->_raw_size += PLT_ENTRY_SIZE;
2849
2850 /* If this symbol is not defined in a regular file, and we are
2851 not generating a shared library, then set the symbol to this
2852 location in the .plt. This is required to make function
2853 pointers compare as equal between the normal executable and
2854 the shared library. */
2855 if (! info->shared
2856 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2857 {
2858 h->root.u.def.section = s;
2859 h->root.u.def.value = s->_raw_size;
2860 }
2861
2862 h->plt.offset = s->_raw_size;
2863
2864 /* Make room for this entry. */
2865 s->_raw_size += PLT_ENTRY_SIZE;
2866
2867 /* We also need to make an entry in the .got.plt section, which
2868 will be placed in the .got section by the linker script. */
252b5132
RH		 2869 s = bfd_get_section_by_name (dynobj, ".got.plt");
2870 BFD_ASSERT (s != NULL);
2871 s->_raw_size += 4;
2872
2873 /* We also need to make an entry in the .rel.plt section. */
2874
2875 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2876 BFD_ASSERT (s != NULL);
2877 s->_raw_size += sizeof (Elf32_External_Rel);
2878
2879 return true;
2880 }
2881
2882 /* If this is a weak symbol, and there is a real definition, the
2883 processor independent code will have arranged for us to see the
2884 real definition first, and we can just use the same value. */
2885 if (h->weakdef != NULL)
2886 {
2887 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2888 || h->weakdef->root.type == bfd_link_hash_defweak);
2889 h->root.u.def.section = h->weakdef->root.u.def.section;
2890 h->root.u.def.value = h->weakdef->root.u.def.value;
2891 return true;
2892 }
2893
2894 /* This is a reference to a symbol defined by a dynamic object which
2895 is not a function. */
2896
2897 /* If we are creating a shared library, we must presume that the
2898 only references to the symbol are via the global offset table.
2899 For such cases we need not do anything here; the relocations will
2900 be handled correctly by relocate_section. */
2901 if (info->shared)
2902 return true;
2903
2904 /* We must allocate the symbol in our .dynbss section, which will
2905 become part of the .bss section of the executable. There will be
2906 an entry for this symbol in the .dynsym section. The dynamic
2907 object will contain position independent code, so all references
2908 from the dynamic object to this symbol will go through the global
2909 offset table. The dynamic linker will use the .dynsym entry to
2910 determine the address it must put in the global offset table, so
2911 both the dynamic object and the regular object will refer to the
2912 same memory location for the variable. */
252b5132
RH		 2913 s = bfd_get_section_by_name (dynobj, ".dynbss");
2914 BFD_ASSERT (s != NULL);
2915
2916 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2917 copy the initial value out of the dynamic object and into the
2918 runtime process image. We need to remember the offset into the
2919 .rel.bss section we are going to use. */
2920 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2921 {
2922 asection *srel;
2923
2924 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
2925 BFD_ASSERT (srel != NULL);
2926 srel->_raw_size += sizeof (Elf32_External_Rel);
2927 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2928 }
2929
2930 /* We need to figure out the alignment required for this symbol. I
2931 have no idea how ELF linkers handle this. */
2932 power_of_two = bfd_log2 (h->size);
2933 if (power_of_two > 3)
2934 power_of_two = 3;
2935
2936 /* Apply the required alignment. */
2937 s->_raw_size = BFD_ALIGN (s->_raw_size,
2938 (bfd_size_type) (1 << power_of_two));
2939 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2940 {
2941 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2942 return false;
2943 }
2944
2945 /* Define the symbol as being at this point in the section. */
2946 h->root.u.def.section = s;
2947 h->root.u.def.value = s->_raw_size;
2948
2949 /* Increment the section size to make room for the symbol. */
2950 s->_raw_size += h->size;
2951
2952 return true;
2953}
2954
2955/* Set the sizes of the dynamic sections. */
2956
2957static boolean
2958elf32_arm_size_dynamic_sections (output_bfd, info)
99e4ae17 2959 bfd * output_bfd ATTRIBUTE_UNUSED;
252b5132
RH		 2960 struct bfd_link_info * info;
2961{
2962 bfd * dynobj;
2963 asection * s;
2964 boolean plt;
2965 boolean relocs;
252b5132
RH		 2966
2967 dynobj = elf_hash_table (info)->dynobj;
2968 BFD_ASSERT (dynobj != NULL);
2969
2970 if (elf_hash_table (info)->dynamic_sections_created)
2971 {
2972 /* Set the contents of the .interp section to the interpreter. */
2973 if (! info->shared)
2974 {
2975 s = bfd_get_section_by_name (dynobj, ".interp");
2976 BFD_ASSERT (s != NULL);
2977 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2978 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2979 }
2980 }
2981 else
2982 {
2983 /* We may have created entries in the .rel.got section.
2984 However, if we are not creating the dynamic sections, we will
2985 not actually use these entries. Reset the size of .rel.got,
2986 which will cause it to get stripped from the output file
2987 below. */
2988 s = bfd_get_section_by_name (dynobj, ".rel.got");
2989 if (s != NULL)
2990 s->_raw_size = 0;
2991 }
2992
2993 /* If this is a -Bsymbolic shared link, then we need to discard all
2994 PC relative relocs against symbols defined in a regular object.
2995 We allocated space for them in the check_relocs routine, but we
2996 will not fill them in in the relocate_section routine. */
2997 if (info->shared && info->symbolic)
2998 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
2999 elf32_arm_discard_copies,
3000 (PTR) NULL);
3001
3002 /* The check_relocs and adjust_dynamic_symbol entry points have
3003 determined the sizes of the various dynamic sections. Allocate
3004 memory for them. */
3005 plt = false;
3006 relocs = false;
252b5132
RH		 3007 for (s = dynobj->sections; s != NULL; s = s->next)
3008 {
3009 const char * name;
3010 boolean strip;
3011
3012 if ((s->flags & SEC_LINKER_CREATED) == 0)
3013 continue;
3014
3015 /* It's OK to base decisions on the section name, because none
3016 of the dynobj section names depend upon the input files. */
3017 name = bfd_get_section_name (dynobj, s);
3018
3019 strip = false;
3020
3021 if (strcmp (name, ".plt") == 0)
3022 {
3023 if (s->_raw_size == 0)
3024 {
3025 /* Strip this section if we don't need it; see the
3026 comment below. */
3027 strip = true;
3028 }
3029 else
3030 {
3031 /* Remember whether there is a PLT. */
3032 plt = true;
3033 }
3034 }
3035 else if (strncmp (name, ".rel", 4) == 0)
3036 {
3037 if (s->_raw_size == 0)
3038 {
3039 /* If we don't need this section, strip it from the
3040 output file. This is mostly to handle .rel.bss and
3041 .rel.plt. We must create both sections in
3042 create_dynamic_sections, because they must be created
3043 before the linker maps input sections to output
3044 sections. The linker does that before
3045 adjust_dynamic_symbol is called, and it is that
3046 function which decides whether anything needs to go
3047 into these sections. */
3048 strip = true;
3049 }
3050 else
3051 {
252b5132
RH		 3052 /* Remember whether there are any reloc sections other
3053 than .rel.plt. */
3054 if (strcmp (name, ".rel.plt") != 0)
99e4ae17 3055 relocs = true;
252b5132
RH		 3056
3057 /* We use the reloc_count field as a counter if we need
3058 to copy relocs into the output file. */
3059 s->reloc_count = 0;
3060 }
3061 }
3062 else if (strncmp (name, ".got", 4) != 0)
3063 {
3064 /* It's not one of our sections, so don't allocate space. */
3065 continue;
3066 }
3067
3068 if (strip)
3069 {
3070 asection ** spp;
3071
3072 for (spp = &s->output_section->owner->sections;
3073 *spp != s->output_section;
3074 spp = &(*spp)->next)
3075 ;
3076 *spp = s->output_section->next;
3077 --s->output_section->owner->section_count;
3078
3079 continue;
3080 }
3081
3082 /* Allocate memory for the section contents. */
3083 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3084 if (s->contents == NULL && s->_raw_size != 0)
3085 return false;
3086 }
3087
3088 if (elf_hash_table (info)->dynamic_sections_created)
3089 {
3090 /* Add some entries to the .dynamic section. We fill in the
3091 values later, in elf32_arm_finish_dynamic_sections, but we
3092 must add the entries now so that we get the correct size for
3093 the .dynamic section. The DT_DEBUG entry is filled in by the
3094 dynamic linker and used by the debugger. */
3095 if (! info->shared)
3096 {
3097 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
3098 return false;
3099 }
3100
3101 if (plt)
3102 {
9b485d32 3103 if ( ! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
252b5132
RH		 3104 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
3105 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL)
3106 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
3107 return false;
3108 }
3109
3110 if (relocs)
3111 {
9b485d32 3112 if ( ! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
252b5132
RH		 3113 || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
3114 || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
3115 sizeof (Elf32_External_Rel)))
3116 return false;
3117 }
3118
99e4ae17 3119 if ((info->flags & DF_TEXTREL) != 0)
252b5132
RH		 3120 {
3121 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
3122 return false;
d6cf2879 3123 info->flags |= DF_TEXTREL;
252b5132
RH		 3124 }
3125 }
3126
3127 return true;
3128}
3129
3130/* This function is called via elf32_arm_link_hash_traverse if we are
3131 creating a shared object with -Bsymbolic. It discards the space
3132 allocated to copy PC relative relocs against symbols which are
3133 defined in regular objects. We allocated space for them in the
3134 check_relocs routine, but we won't fill them in in the
3135 relocate_section routine. */
3136
3137static boolean
3138elf32_arm_discard_copies (h, ignore)
3139 struct elf32_arm_link_hash_entry * h;
5f771d47 3140 PTR ignore ATTRIBUTE_UNUSED;
252b5132
RH		 3141{
3142 struct elf32_arm_pcrel_relocs_copied * s;
3143
3144 /* We only discard relocs for symbols defined in a regular object. */
3145 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3146 return true;
3147
3148 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3149 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
3150
3151 return true;
3152}
3153
3154/* Finish up dynamic symbol handling. We set the contents of various
3155 dynamic sections here. */
3156
3157static boolean
3158elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3159 bfd * output_bfd;
3160 struct bfd_link_info * info;
3161 struct elf_link_hash_entry * h;
3162 Elf_Internal_Sym * sym;
3163{
3164 bfd * dynobj;
3165
3166 dynobj = elf_hash_table (info)->dynobj;
3167
3168 if (h->plt.offset != (bfd_vma) -1)
3169 {
3170 asection * splt;
3171 asection * sgot;
3172 asection * srel;
3173 bfd_vma plt_index;
3174 bfd_vma got_offset;
3175 Elf_Internal_Rel rel;
3176
3177 /* This symbol has an entry in the procedure linkage table. Set
3178 it up. */
3179
3180 BFD_ASSERT (h->dynindx != -1);
3181
3182 splt = bfd_get_section_by_name (dynobj, ".plt");
3183 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3184 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
3185 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
3186
3187 /* Get the index in the procedure linkage table which
3188 corresponds to this symbol. This is the index of this symbol
3189 in all the symbols for which we are making plt entries. The
3190 first entry in the procedure linkage table is reserved. */
3191 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3192
3193 /* Get the offset into the .got table of the entry that
3194 corresponds to this function. Each .got entry is 4 bytes.
3195 The first three are reserved. */
3196 got_offset = (plt_index + 3) * 4;
3197
3198 /* Fill in the entry in the procedure linkage table. */
f7a74f8c
NC		 3199 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0],
3200 splt->contents + h->plt.offset + 0);
3201 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1],
3202 splt->contents + h->plt.offset + 4);
3203 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2],
3204 splt->contents + h->plt.offset + 8);
252b5132
RH		 3205 bfd_put_32 (output_bfd,
3206 (sgot->output_section->vma
3207 + sgot->output_offset
f21f3fe0 3208 + got_offset
252b5132
RH		 3209 - splt->output_section->vma
3210 - splt->output_offset
3211 - h->plt.offset - 12),
3212 splt->contents + h->plt.offset + 12);
3213
3214 /* Fill in the entry in the global offset table. */
3215 bfd_put_32 (output_bfd,
3216 (splt->output_section->vma
3217 + splt->output_offset),
3218 sgot->contents + got_offset);
3219
3220 /* Fill in the entry in the .rel.plt section. */
3221 rel.r_offset = (sgot->output_section->vma
3222 + sgot->output_offset
3223 + got_offset);
3224 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
3225 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3226 ((Elf32_External_Rel *) srel->contents
3227 + plt_index));
3228
3229 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3230 {
3231 /* Mark the symbol as undefined, rather than as defined in
3232 the .plt section. Leave the value alone. */
3233 sym->st_shndx = SHN_UNDEF;
d982ba73
PB		 3234 /* If the symbol is weak, we do need to clear the value.
3235 Otherwise, the PLT entry would provide a definition for
3236 the symbol even if the symbol wasn't defined anywhere,
3237 and so the symbol would never be NULL. */
3238 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3239 == 0)
3240 sym->st_value = 0;
252b5132
RH		 3241 }
3242 }
3243
3244 if (h->got.offset != (bfd_vma) -1)
3245 {
3246 asection * sgot;
3247 asection * srel;
3248 Elf_Internal_Rel rel;
3249
3250 /* This symbol has an entry in the global offset table. Set it
3251 up. */
252b5132
RH		 3252 sgot = bfd_get_section_by_name (dynobj, ".got");
3253 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3254 BFD_ASSERT (sgot != NULL && srel != NULL);
3255
3256 rel.r_offset = (sgot->output_section->vma
3257 + sgot->output_offset
3258 + (h->got.offset &~ 1));
3259
3260 /* If this is a -Bsymbolic link, and the symbol is defined
3261 locally, we just want to emit a RELATIVE reloc. The entry in
3262 the global offset table will already have been initialized in
3263 the relocate_section function. */
3264 if (info->shared
3265 && (info->symbolic || h->dynindx == -1)
3266 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3267 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3268 else
3269 {
3270 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3271 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3272 }
3273
3274 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3275 ((Elf32_External_Rel *) srel->contents
3276 + srel->reloc_count));
3277 ++srel->reloc_count;
3278 }
3279
3280 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3281 {
3282 asection * s;
3283 Elf_Internal_Rel rel;
3284
3285 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH		 3286 BFD_ASSERT (h->dynindx != -1
3287 && (h->root.type == bfd_link_hash_defined
3288 || h->root.type == bfd_link_hash_defweak));
3289
3290 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3291 ".rel.bss");
3292 BFD_ASSERT (s != NULL);
3293
3294 rel.r_offset = (h->root.u.def.value
3295 + h->root.u.def.section->output_section->vma
3296 + h->root.u.def.section->output_offset);
3297 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3298 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3299 ((Elf32_External_Rel *) s->contents
3300 + s->reloc_count));
3301 ++s->reloc_count;
3302 }
3303
3304 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3305 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3306 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3307 sym->st_shndx = SHN_ABS;
3308
3309 return true;
3310}
3311
3312/* Finish up the dynamic sections. */
3313
3314static boolean
3315elf32_arm_finish_dynamic_sections (output_bfd, info)
3316 bfd * output_bfd;
3317 struct bfd_link_info * info;
3318{
3319 bfd * dynobj;
3320 asection * sgot;
3321 asection * sdyn;
3322
3323 dynobj = elf_hash_table (info)->dynobj;
3324
3325 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3326 BFD_ASSERT (sgot != NULL);
3327 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3328
3329 if (elf_hash_table (info)->dynamic_sections_created)
3330 {
3331 asection *splt;
3332 Elf32_External_Dyn *dyncon, *dynconend;
3333
3334 splt = bfd_get_section_by_name (dynobj, ".plt");
3335 BFD_ASSERT (splt != NULL && sdyn != NULL);
3336
3337 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3338 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
9b485d32 3339
252b5132
RH		 3340 for (; dyncon < dynconend; dyncon++)
3341 {
3342 Elf_Internal_Dyn dyn;
3343 const char * name;
3344 asection * s;
3345
3346 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3347
3348 switch (dyn.d_tag)
3349 {
3350 default:
3351 break;
3352
3353 case DT_PLTGOT:
3354 name = ".got";
3355 goto get_vma;
3356 case DT_JMPREL:
3357 name = ".rel.plt";
3358 get_vma:
3359 s = bfd_get_section_by_name (output_bfd, name);
3360 BFD_ASSERT (s != NULL);
3361 dyn.d_un.d_ptr = s->vma;
3362 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3363 break;
3364
3365 case DT_PLTRELSZ:
3366 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3367 BFD_ASSERT (s != NULL);
3368 if (s->_cooked_size != 0)
3369 dyn.d_un.d_val = s->_cooked_size;
3370 else
3371 dyn.d_un.d_val = s->_raw_size;
3372 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3373 break;
3374
3375 case DT_RELSZ:
3376 /* My reading of the SVR4 ABI indicates that the
3377 procedure linkage table relocs (DT_JMPREL) should be
3378 included in the overall relocs (DT_REL). This is
3379 what Solaris does. However, UnixWare can not handle
3380 that case. Therefore, we override the DT_RELSZ entry
3381 here to make it not include the JMPREL relocs. Since
3382 the linker script arranges for .rel.plt to follow all
3383 other relocation sections, we don't have to worry
3384 about changing the DT_REL entry. */
3385 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3386 if (s != NULL)
3387 {
3388 if (s->_cooked_size != 0)
3389 dyn.d_un.d_val -= s->_cooked_size;
3390 else
3391 dyn.d_un.d_val -= s->_raw_size;
3392 }
3393 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3394 break;
3395 }
3396 }
3397
3398 /* Fill in the first entry in the procedure linkage table. */
3399 if (splt->_raw_size > 0)
f7a74f8c
NC		 3400 {
3401 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
3402 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
3403 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
3404 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
3405 }
252b5132
RH		 3406
3407 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3408 really seem like the right value. */
3409 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3410 }
3411
3412 /* Fill in the first three entries in the global offset table. */
3413 if (sgot->_raw_size > 0)
3414 {
3415 if (sdyn == NULL)
3416 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3417 else
3418 bfd_put_32 (output_bfd,
3419 sdyn->output_section->vma + sdyn->output_offset,
3420 sgot->contents);
3421 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3422 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3423 }
3424
3425 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3426
3427 return true;
3428}
3429
ba96a88f
NC		 3430static void
3431elf32_arm_post_process_headers (abfd, link_info)
3432 bfd * abfd;
5f771d47 3433 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f 3434{
9b485d32 3435 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
ba96a88f
NC		 3436
3437 i_ehdrp = elf_elfheader (abfd);
3438
3439 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3440 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3441}
3442
99e4ae17
AJ		 3443static enum elf_reloc_type_class
3444elf32_arm_reloc_type_class (type)
3445 int type;
3446{
3447 switch (type)
3448 {
3449 case R_ARM_RELATIVE:
3450 return reloc_class_relative;
3451 case R_ARM_JUMP_SLOT:
3452 return reloc_class_plt;
3453 case R_ARM_COPY:
3454 return reloc_class_copy;
3455 default:
3456 return reloc_class_normal;
3457 }
3458}
3459
3460
252b5132
RH		 3461#define ELF_ARCH bfd_arch_arm
3462#define ELF_MACHINE_CODE EM_ARM
f21f3fe0 3463#define ELF_MAXPAGESIZE 0x8000
252b5132 3464
99e4ae17
AJ		 3465#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3466#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH		 3467#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3468#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3469#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
99e4ae17 3470#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132
RH		 3471#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3472
3473#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3474#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3475#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3476#define elf_backend_check_relocs elf32_arm_check_relocs
99e4ae17 3477#define elf_backend_relocate_section elf32_arm_relocate_section
252b5132
RH		 3478#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3479#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3480#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3481#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3482#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 3483#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 3484#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
252b5132
RH		 3485
3486#define elf_backend_can_gc_sections 1
3487#define elf_backend_plt_readonly 1
3488#define elf_backend_want_got_plt 1
3489#define elf_backend_want_plt_sym 0
3490
04f7c78d
NC		 3491#define elf_backend_got_header_size 12
3492#define elf_backend_plt_header_size PLT_ENTRY_SIZE
3493
252b5132 3494#include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.255388 seconds and 4 git commands to generate.