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(Free Software): Fix wording of the new section.
[deliverable/binutils-gdb.git] / bfd / elf32-arm.h
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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 *,
dc810e39 38 const char *, int, 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 94static enum elf_reloc_type_class elf32_arm_reloc_type_class
f51e552e 95 PARAMS ((const Elf_Internal_Rela *));
99e4ae17 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. */
dc810e39 120static const bfd_vma 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. */
dc810e39 130static const bfd_vma 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 186 /* The size in bytes of the section containg the Thumb-to-ARM glue. */
dc810e39 187 bfd_size_type thumb_glue_size;
252b5132 188
917583ad 189 /* The size in bytes of the section containg the ARM-to-Thumb glue. */
dc810e39 190 bfd_size_type 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;
dc810e39 237 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
252b5132 238
dc810e39 239 ret = (struct elf32_arm_link_hash_table *) bfd_alloc (abfd, amt);
252b5132
RH		 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
dc810e39
AM		 273 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
274 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 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 */
8f615d07
AM		 285 (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"),
286 bfd_archive_filename (input_bfd), tmp_name, name);
252b5132
RH		 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
dc810e39
AM		 308 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
309 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 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 */
8f615d07
AM		 320 (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"),
321 bfd_archive_filename (input_bfd), tmp_name, name);
252b5132
RH		 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
dc810e39
AM		 386 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
387 ARM2THUMB_GLUE_SECTION_NAME);
252b5132
RH		 388
389 BFD_ASSERT (s != NULL);
390
dc810e39
AM		 391 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
392 globals->arm_glue_size);
252b5132
RH		 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
dc810e39
AM		 407 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
408 globals->thumb_glue_size);
252b5132
RH		 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;
63b0f745 423 asection * s;
252b5132
RH		 424 char * tmp_name;
425 struct elf_link_hash_entry * myh;
426 struct elf32_arm_link_hash_table * globals;
dc810e39 427 bfd_vma val;
252b5132
RH		 428
429 globals = elf32_arm_hash_table (link_info);
430
431 BFD_ASSERT (globals != NULL);
432 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
433
434 s = bfd_get_section_by_name
435 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
436
252b5132
RH		 437 BFD_ASSERT (s != NULL);
438
dc810e39
AM		 439 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
440 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 441
442 BFD_ASSERT (tmp_name);
443
444 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
445
446 myh = elf_link_hash_lookup
447 (&(globals)->root, tmp_name, false, false, true);
448
449 if (myh != NULL)
450 {
9b485d32 451 /* We've already seen this guy. */
252b5132 452 free (tmp_name);
9b485d32 453 return;
252b5132
RH		 454 }
455
456 /* The only trick here is using hash_table->arm_glue_size as the value. Even
457 though the section isn't allocated yet, this is where we will be putting
458 it. */
dc810e39
AM		 459 val = globals->arm_glue_size + 1;
460 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
461 tmp_name, BSF_GLOBAL, s, val,
252b5132
RH		 462 NULL, true, false,
463 (struct bfd_link_hash_entry **) &myh);
464
465 free (tmp_name);
466
467 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
468
469 return;
470}
471
472static void
473record_thumb_to_arm_glue (link_info, h)
474 struct bfd_link_info *link_info;
475 struct elf_link_hash_entry *h;
476{
477 const char *name = h->root.root.string;
63b0f745 478 asection *s;
252b5132
RH		 479 char *tmp_name;
480 struct elf_link_hash_entry *myh;
481 struct elf32_arm_link_hash_table *hash_table;
482 char bind;
dc810e39 483 bfd_vma val;
252b5132
RH		 484
485 hash_table = elf32_arm_hash_table (link_info);
486
487 BFD_ASSERT (hash_table != NULL);
488 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
489
490 s = bfd_get_section_by_name
491 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
492
493 BFD_ASSERT (s != NULL);
494
dc810e39
AM		 495 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
496 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 497
498 BFD_ASSERT (tmp_name);
499
500 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
501
502 myh = elf_link_hash_lookup
503 (&(hash_table)->root, tmp_name, false, false, true);
504
505 if (myh != NULL)
506 {
9b485d32 507 /* We've already seen this guy. */
252b5132 508 free (tmp_name);
9b485d32 509 return;
252b5132
RH		 510 }
511
dc810e39
AM		 512 val = hash_table->thumb_glue_size + 1;
513 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
514 tmp_name, BSF_GLOBAL, s, val,
252b5132
RH		 515 NULL, true, false,
516 (struct bfd_link_hash_entry **) &myh);
517
9b485d32 518 /* If we mark it 'Thumb', the disassembler will do a better job. */
252b5132
RH		 519 bind = ELF_ST_BIND (myh->type);
520 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
521
522 free (tmp_name);
523
252b5132
RH		 524#define CHANGE_TO_ARM "__%s_change_to_arm"
525#define BACK_FROM_ARM "__%s_back_from_arm"
526
9b485d32 527 /* Allocate another symbol to mark where we switch to Arm mode. */
dc810e39
AM		 528 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
529 + strlen (CHANGE_TO_ARM) + 1);
252b5132
RH		 530
531 BFD_ASSERT (tmp_name);
532
533 sprintf (tmp_name, CHANGE_TO_ARM, name);
534
535 myh = NULL;
536
dc810e39
AM		 537 val = hash_table->thumb_glue_size + 4,
538 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
539 tmp_name, BSF_LOCAL, s, val,
252b5132
RH		 540 NULL, true, false,
541 (struct bfd_link_hash_entry **) &myh);
542
543 free (tmp_name);
544
545 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
546
547 return;
548}
549
550/* Select a BFD to be used to hold the sections used by the glue code.
551 This function is called from the linker scripts in ld/emultempl/
552 {armelf/pe}.em */
9b485d32 553
252b5132
RH		 554boolean
555bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
556 bfd *abfd;
557 struct bfd_link_info *info;
558{
559 struct elf32_arm_link_hash_table *globals;
560 flagword flags;
561 asection *sec;
562
563 /* If we are only performing a partial link do not bother
564 getting a bfd to hold the glue. */
565 if (info->relocateable)
566 return true;
567
568 globals = elf32_arm_hash_table (info);
569
570 BFD_ASSERT (globals != NULL);
571
572 if (globals->bfd_of_glue_owner != NULL)
573 return true;
574
575 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
576
577 if (sec == NULL)
578 {
57db232e
NC		 579 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
580 will prevent elf_link_input_bfd() from processing the contents
581 of this section. */
811b4bf6 582 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 583
584 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
585
586 if (sec == NULL
587 || !bfd_set_section_flags (abfd, sec, flags)
588 || !bfd_set_section_alignment (abfd, sec, 2))
589 return false;
9a5aca8c 590
57db232e
NC		 591 /* Set the gc mark to prevent the section from being removed by garbage
592 collection, despite the fact that no relocs refer to this section. */
593 sec->gc_mark = 1;
252b5132
RH		 594 }
595
596 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
597
598 if (sec == NULL)
599 {
811b4bf6 600 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 601
602 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
603
604 if (sec == NULL
605 || !bfd_set_section_flags (abfd, sec, flags)
606 || !bfd_set_section_alignment (abfd, sec, 2))
607 return false;
9a5aca8c 608
57db232e 609 sec->gc_mark = 1;
252b5132
RH		 610 }
611
612 /* Save the bfd for later use. */
613 globals->bfd_of_glue_owner = abfd;
614
615 return true;
616}
617
618boolean
ba96a88f 619bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
252b5132
RH		 620 bfd *abfd;
621 struct bfd_link_info *link_info;
ba96a88f 622 int no_pipeline_knowledge;
252b5132
RH		 623{
624 Elf_Internal_Shdr *symtab_hdr;
625 Elf_Internal_Rela *free_relocs = NULL;
626 Elf_Internal_Rela *irel, *irelend;
627 bfd_byte *contents = NULL;
628 bfd_byte *free_contents = NULL;
629 Elf32_External_Sym *extsyms = NULL;
630 Elf32_External_Sym *free_extsyms = NULL;
631
632 asection *sec;
633 struct elf32_arm_link_hash_table *globals;
634
635 /* If we are only performing a partial link do not bother
636 to construct any glue. */
637 if (link_info->relocateable)
638 return true;
639
640 /* Here we have a bfd that is to be included on the link. We have a hook
641 to do reloc rummaging, before section sizes are nailed down. */
252b5132
RH		 642 globals = elf32_arm_hash_table (link_info);
643
644 BFD_ASSERT (globals != NULL);
645 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
646
ba96a88f 647 globals->no_pipeline_knowledge = no_pipeline_knowledge;
f21f3fe0 648
252b5132
RH		 649 /* Rummage around all the relocs and map the glue vectors. */
650 sec = abfd->sections;
651
652 if (sec == NULL)
653 return true;
654
655 for (; sec != NULL; sec = sec->next)
656 {
657 if (sec->reloc_count == 0)
658 continue;
659
660 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 661
9b485d32 662 /* Load the relocs. */
252b5132 663 irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL,
dc810e39 664 (Elf_Internal_Rela *) NULL, false));
252b5132
RH		 665
666 BFD_ASSERT (irel != 0);
667
668 irelend = irel + sec->reloc_count;
669 for (; irel < irelend; irel++)
670 {
671 long r_type;
672 unsigned long r_index;
252b5132
RH		 673
674 struct elf_link_hash_entry *h;
675
676 r_type = ELF32_R_TYPE (irel->r_info);
677 r_index = ELF32_R_SYM (irel->r_info);
678
9b485d32 679 /* These are the only relocation types we care about. */
ba96a88f 680 if ( r_type != R_ARM_PC24
252b5132
RH		 681 && r_type != R_ARM_THM_PC22)
682 continue;
683
684 /* Get the section contents if we haven't done so already. */
685 if (contents == NULL)
686 {
687 /* Get cached copy if it exists. */
688 if (elf_section_data (sec)->this_hdr.contents != NULL)
689 contents = elf_section_data (sec)->this_hdr.contents;
690 else
691 {
692 /* Go get them off disk. */
693 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
694 if (contents == NULL)
695 goto error_return;
9b485d32 696
252b5132
RH		 697 free_contents = contents;
698
699 if (!bfd_get_section_contents (abfd, sec, contents,
dc810e39 700 (file_ptr) 0, sec->_raw_size))
252b5132
RH		 701 goto error_return;
702 }
703 }
704
705 /* Read this BFD's symbols if we haven't done so already. */
706 if (extsyms == NULL)
707 {
708 /* Get cached copy if it exists. */
709 if (symtab_hdr->contents != NULL)
710 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
711 else
712 {
713 /* Go get them off disk. */
714 extsyms = ((Elf32_External_Sym *)
715 bfd_malloc (symtab_hdr->sh_size));
716 if (extsyms == NULL)
717 goto error_return;
9b485d32 718
252b5132 719 free_extsyms = extsyms;
9b485d32 720
252b5132 721 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
dc810e39 722 || (bfd_bread (extsyms, symtab_hdr->sh_size, abfd)
252b5132
RH		 723 != symtab_hdr->sh_size))
724 goto error_return;
725 }
726 }
727
a7c10850 728 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH		 729 h = NULL;
730
9b485d32 731 /* We don't care about local symbols. */
252b5132
RH		 732 if (r_index < symtab_hdr->sh_info)
733 continue;
734
9b485d32 735 /* This is an external symbol. */
252b5132
RH		 736 r_index -= symtab_hdr->sh_info;
737 h = (struct elf_link_hash_entry *)
738 elf_sym_hashes (abfd)[r_index];
739
740 /* If the relocation is against a static symbol it must be within
741 the current section and so cannot be a cross ARM/Thumb relocation. */
742 if (h == NULL)
743 continue;
744
745 switch (r_type)
746 {
747 case R_ARM_PC24:
748 /* This one is a call from arm code. We need to look up
2f0ca46a 749 the target of the call. If it is a thumb target, we
252b5132 750 insert glue. */
252b5132
RH		 751 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
752 record_arm_to_thumb_glue (link_info, h);
753 break;
754
755 case R_ARM_THM_PC22:
f21f3fe0 756 /* This one is a call from thumb code. We look
2f0ca46a 757 up the target of the call. If it is not a thumb
bcbdc74c 758 target, we insert glue. */
252b5132
RH		 759 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
760 record_thumb_to_arm_glue (link_info, h);
761 break;
762
763 default:
764 break;
765 }
766 }
767 }
768
769 return true;
9a5aca8c 770
252b5132
RH		 771error_return:
772 if (free_relocs != NULL)
773 free (free_relocs);
774 if (free_contents != NULL)
775 free (free_contents);
776 if (free_extsyms != NULL)
777 free (free_extsyms);
9a5aca8c 778
252b5132 779 return false;
252b5132
RH		 780}
781
782/* The thumb form of a long branch is a bit finicky, because the offset
783 encoding is split over two fields, each in it's own instruction. They
f21f3fe0 784 can occur in any order. So given a thumb form of long branch, and an
252b5132 785 offset, insert the offset into the thumb branch and return finished
f21f3fe0 786 instruction.
252b5132 787
f21f3fe0 788 It takes two thumb instructions to encode the target address. Each has
252b5132 789 11 bits to invest. The upper 11 bits are stored in one (identifed by
f21f3fe0
UD		 790 H-0.. see below), the lower 11 bits are stored in the other (identified
791 by H-1).
252b5132 792
f21f3fe0 793 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH		 794 there you have it.
795
796 Op: 1111 = F,
797 H-0, upper address-0 = 000
798 Op: 1111 = F,
799 H-1, lower address-0 = 800
800
f21f3fe0 801 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH		 802 the lower one first. It probably doesn't matter. krk@cygnus.com
803
804 XXX: Actually the order does matter. The second instruction (H-1)
805 moves the computed address into the PC, so it must be the second one
806 in the sequence. The problem, however is that whilst little endian code
807 stores the instructions in HI then LOW order, big endian code does the
dfc5f959 808 reverse. nickc@cygnus.com. */
252b5132 809
dfc5f959
NC		 810#define LOW_HI_ORDER 0xF800F000
811#define HI_LOW_ORDER 0xF000F800
252b5132
RH		 812
813static insn32
814insert_thumb_branch (br_insn, rel_off)
815 insn32 br_insn;
816 int rel_off;
817{
818 unsigned int low_bits;
819 unsigned int high_bits;
820
252b5132
RH		 821 BFD_ASSERT ((rel_off & 1) != 1);
822
dfc5f959
NC		 823 rel_off >>= 1; /* Half word aligned address. */
824 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
825 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
252b5132
RH		 826
827 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
828 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
829 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
830 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
831 else
9b485d32
NC		 832 /* FIXME: abort is probably not the right call. krk@cygnus.com */
833 abort (); /* error - not a valid branch instruction form. */
252b5132 834
252b5132
RH		 835 return br_insn;
836}
837
9b485d32
NC		 838/* Thumb code calling an ARM function. */
839
252b5132
RH		 840static int
841elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
842 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 843 struct bfd_link_info * info;
844 const char * name;
845 bfd * input_bfd;
846 bfd * output_bfd;
847 asection * input_section;
848 bfd_byte * hit_data;
849 asection * sym_sec;
850 bfd_vma offset;
851 bfd_signed_vma addend;
852 bfd_vma val;
252b5132 853{
bcbdc74c 854 asection * s = 0;
dc810e39 855 bfd_vma my_offset;
252b5132
RH		 856 unsigned long int tmp;
857 long int ret_offset;
bcbdc74c
NC		 858 struct elf_link_hash_entry * myh;
859 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 860
861 myh = find_thumb_glue (info, name, input_bfd);
862 if (myh == NULL)
863 return false;
864
865 globals = elf32_arm_hash_table (info);
866
867 BFD_ASSERT (globals != NULL);
868 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
869
870 my_offset = myh->root.u.def.value;
871
872 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
873 THUMB2ARM_GLUE_SECTION_NAME);
874
875 BFD_ASSERT (s != NULL);
876 BFD_ASSERT (s->contents != NULL);
877 BFD_ASSERT (s->output_section != NULL);
878
879 if ((my_offset & 0x01) == 0x01)
880 {
881 if (sym_sec != NULL
882 && sym_sec->owner != NULL
883 && !INTERWORK_FLAG (sym_sec->owner))
884 {
8f615d07 885 (*_bfd_error_handler)
9b485d32 886 (_("%s(%s): warning: interworking not enabled."),
8f615d07
AM		 887 bfd_archive_filename (sym_sec->owner), name);
888 (*_bfd_error_handler)
9b485d32 889 (_(" first occurrence: %s: thumb call to arm"),
8f615d07 890 bfd_archive_filename (input_bfd));
252b5132
RH		 891
892 return false;
893 }
894
895 --my_offset;
896 myh->root.u.def.value = my_offset;
897
dc810e39 898 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
252b5132
RH		 899 s->contents + my_offset);
900
dc810e39 901 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
252b5132
RH		 902 s->contents + my_offset + 2);
903
904 ret_offset =
9b485d32
NC		 905 /* Address of destination of the stub. */
906 ((bfd_signed_vma) val)
252b5132 907 - ((bfd_signed_vma)
9b485d32
NC		 908 /* Offset from the start of the current section to the start of the stubs. */
909 (s->output_offset
910 /* Offset of the start of this stub from the start of the stubs. */
911 + my_offset
912 /* Address of the start of the current section. */
913 + s->output_section->vma)
914 /* The branch instruction is 4 bytes into the stub. */
915 + 4
916 /* ARM branches work from the pc of the instruction + 8. */
917 + 8);
252b5132
RH		 918
919 bfd_put_32 (output_bfd,
dc810e39 920 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
252b5132
RH		 921 s->contents + my_offset + 4);
922 }
923
924 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
925
926 /* Now go back and fix up the original BL insn to point
927 to here. */
dc810e39
AM		 928 ret_offset = (s->output_offset
929 + my_offset
930 - (input_section->output_offset
931 + offset + addend)
932 - 8);
252b5132
RH		 933
934 tmp = bfd_get_32 (input_bfd, hit_data
935 - input_section->vma);
936
937 bfd_put_32 (output_bfd,
dc810e39 938 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
252b5132
RH		 939 hit_data - input_section->vma);
940
941 return true;
942}
943
9b485d32
NC		 944/* Arm code calling a Thumb function. */
945
252b5132
RH		 946static int
947elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
948 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 949 struct bfd_link_info * info;
950 const char * name;
951 bfd * input_bfd;
952 bfd * output_bfd;
953 asection * input_section;
954 bfd_byte * hit_data;
955 asection * sym_sec;
956 bfd_vma offset;
957 bfd_signed_vma addend;
958 bfd_vma val;
252b5132
RH		 959{
960 unsigned long int tmp;
dc810e39 961 bfd_vma my_offset;
bcbdc74c 962 asection * s;
252b5132 963 long int ret_offset;
bcbdc74c
NC		 964 struct elf_link_hash_entry * myh;
965 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 966
967 myh = find_arm_glue (info, name, input_bfd);
968 if (myh == NULL)
969 return false;
970
971 globals = elf32_arm_hash_table (info);
972
973 BFD_ASSERT (globals != NULL);
974 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
975
976 my_offset = myh->root.u.def.value;
977 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
978 ARM2THUMB_GLUE_SECTION_NAME);
979 BFD_ASSERT (s != NULL);
980 BFD_ASSERT (s->contents != NULL);
981 BFD_ASSERT (s->output_section != NULL);
982
983 if ((my_offset & 0x01) == 0x01)
984 {
985 if (sym_sec != NULL
986 && sym_sec->owner != NULL
987 && !INTERWORK_FLAG (sym_sec->owner))
988 {
8f615d07 989 (*_bfd_error_handler)
9b485d32 990 (_("%s(%s): warning: interworking not enabled."),
8f615d07
AM		 991 bfd_archive_filename (sym_sec->owner), name);
992 (*_bfd_error_handler)
9b485d32 993 (_(" first occurrence: %s: arm call to thumb"),
8f615d07 994 bfd_archive_filename (input_bfd));
252b5132 995 }
9b485d32 996
252b5132
RH		 997 --my_offset;
998 myh->root.u.def.value = my_offset;
999
dc810e39 1000 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
252b5132
RH		 1001 s->contents + my_offset);
1002
dc810e39 1003 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
252b5132
RH		 1004 s->contents + my_offset + 4);
1005
1006 /* It's a thumb address. Add the low order bit. */
1007 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
1008 s->contents + my_offset + 8);
1009 }
1010
1011 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1012
1013 tmp = bfd_get_32 (input_bfd, hit_data);
1014 tmp = tmp & 0xFF000000;
1015
9b485d32 1016 /* Somehow these are both 4 too far, so subtract 8. */
dc810e39
AM		 1017 ret_offset = (s->output_offset
1018 + my_offset
1019 + s->output_section->vma
1020 - (input_section->output_offset
1021 + input_section->output_section->vma
1022 + offset + addend)
1023 - 8);
9a5aca8c 1024
252b5132
RH		 1025 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
1026
dc810e39 1027 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
252b5132 1028
252b5132
RH		 1029 return true;
1030}
1031
1032/* Perform a relocation as part of a final link. */
9b485d32 1033
252b5132
RH		 1034static bfd_reloc_status_type
1035elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1036 input_section, contents, rel, value,
780a67af 1037 info, sym_sec, sym_name, sym_flags, h)
252b5132
RH		 1038 reloc_howto_type * howto;
1039 bfd * input_bfd;
1040 bfd * output_bfd;
1041 asection * input_section;
1042 bfd_byte * contents;
1043 Elf_Internal_Rela * rel;
1044 bfd_vma value;
1045 struct bfd_link_info * info;
1046 asection * sym_sec;
1047 const char * sym_name;
dc810e39 1048 int sym_flags;
780a67af 1049 struct elf_link_hash_entry * h;
252b5132
RH		 1050{
1051 unsigned long r_type = howto->type;
1052 unsigned long r_symndx;
1053 bfd_byte * hit_data = contents + rel->r_offset;
1054 bfd * dynobj = NULL;
1055 Elf_Internal_Shdr * symtab_hdr;
1056 struct elf_link_hash_entry ** sym_hashes;
1057 bfd_vma * local_got_offsets;
1058 asection * sgot = NULL;
1059 asection * splt = NULL;
1060 asection * sreloc = NULL;
252b5132 1061 bfd_vma addend;
ba96a88f
NC		 1062 bfd_signed_vma signed_addend;
1063 struct elf32_arm_link_hash_table * globals;
f21f3fe0 1064
cac15327
NC		 1065 /* If the start address has been set, then set the EF_ARM_HASENTRY
1066 flag. Setting this more than once is redundant, but the cost is
1067 not too high, and it keeps the code simple.
99e4ae17 1068
cac15327
NC		 1069 The test is done here, rather than somewhere else, because the
1070 start address is only set just before the final link commences.
1071
1072 Note - if the user deliberately sets a start address of 0, the
1073 flag will not be set. */
1074 if (bfd_get_start_address (output_bfd) != 0)
1075 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
99e4ae17 1076
ba96a88f 1077 globals = elf32_arm_hash_table (info);
f21f3fe0 1078
252b5132
RH		 1079 dynobj = elf_hash_table (info)->dynobj;
1080 if (dynobj)
1081 {
1082 sgot = bfd_get_section_by_name (dynobj, ".got");
1083 splt = bfd_get_section_by_name (dynobj, ".plt");
1084 }
1085 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1086 sym_hashes = elf_sym_hashes (input_bfd);
1087 local_got_offsets = elf_local_got_offsets (input_bfd);
1088 r_symndx = ELF32_R_SYM (rel->r_info);
1089
1090#ifdef USE_REL
ba96a88f
NC		 1091 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1092
1093 if (addend & ((howto->src_mask + 1) >> 1))
1094 {
1095 signed_addend = -1;
1096 signed_addend &= ~ howto->src_mask;
1097 signed_addend |= addend;
1098 }
1099 else
1100 signed_addend = addend;
252b5132 1101#else
ba96a88f 1102 addend = signed_addend = rel->r_addend;
252b5132 1103#endif
f21f3fe0 1104
252b5132
RH		 1105 switch (r_type)
1106 {
1107 case R_ARM_NONE:
1108 return bfd_reloc_ok;
1109
1110 case R_ARM_PC24:
1111 case R_ARM_ABS32:
1112 case R_ARM_REL32:
dfc5f959
NC		 1113#ifndef OLD_ARM_ABI
1114 case R_ARM_XPC25:
1115#endif
252b5132 1116 /* When generating a shared object, these relocations are copied
9b485d32 1117 into the output file to be resolved at run time. */
252b5132 1118 if (info->shared
ec338859 1119 && r_symndx != 0
252b5132 1120 && (r_type != R_ARM_PC24
99e4ae17 1121 || (h != NULL
252b5132
RH		 1122 && h->dynindx != -1
1123 && (! info->symbolic
1124 || (h->elf_link_hash_flags
1125 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1126 {
1127 Elf_Internal_Rel outrel;
1128 boolean skip, relocate;
f21f3fe0 1129
252b5132
RH		 1130 if (sreloc == NULL)
1131 {
1132 const char * name;
f21f3fe0 1133
252b5132
RH		 1134 name = (bfd_elf_string_from_elf_section
1135 (input_bfd,
1136 elf_elfheader (input_bfd)->e_shstrndx,
1137 elf_section_data (input_section)->rel_hdr.sh_name));
1138 if (name == NULL)
1139 return bfd_reloc_notsupported;
f21f3fe0 1140
252b5132
RH		 1141 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1142 && strcmp (bfd_get_section_name (input_bfd,
1143 input_section),
1144 name + 4) == 0);
f21f3fe0 1145
252b5132
RH		 1146 sreloc = bfd_get_section_by_name (dynobj, name);
1147 BFD_ASSERT (sreloc != NULL);
1148 }
f21f3fe0 1149
252b5132 1150 skip = false;
f21f3fe0 1151
c629eae0
JJ		 1152 outrel.r_offset =
1153 _bfd_elf_section_offset (output_bfd, info, input_section,
1154 rel->r_offset);
1155 if (outrel.r_offset == (bfd_vma) -1)
1156 skip = true;
252b5132
RH		 1157 outrel.r_offset += (input_section->output_section->vma
1158 + input_section->output_offset);
f21f3fe0 1159
252b5132
RH		 1160 if (skip)
1161 {
1162 memset (&outrel, 0, sizeof outrel);
1163 relocate = false;
1164 }
1165 else if (r_type == R_ARM_PC24)
1166 {
1167 BFD_ASSERT (h != NULL && h->dynindx != -1);
1168 if ((input_section->flags & SEC_ALLOC) != 0)
1169 relocate = false;
1170 else
1171 relocate = true;
1172 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24);
1173 }
1174 else
1175 {
1176 if (h == NULL
1177 || ((info->symbolic || h->dynindx == -1)
1178 && (h->elf_link_hash_flags
1179 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1180 {
1181 relocate = true;
1182 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1183 }
1184 else
1185 {
1186 BFD_ASSERT (h->dynindx != -1);
1187 if ((input_section->flags & SEC_ALLOC) != 0)
1188 relocate = false;
1189 else
1190 relocate = true;
1191 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32);
1192 }
1193 }
f21f3fe0 1194
252b5132
RH		 1195 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1196 (((Elf32_External_Rel *)
1197 sreloc->contents)
1198 + sreloc->reloc_count));
1199 ++sreloc->reloc_count;
9a5aca8c 1200
f21f3fe0 1201 /* If this reloc is against an external symbol, we do not want to
252b5132 1202 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 1203 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH		 1204 if (! relocate)
1205 return bfd_reloc_ok;
9a5aca8c 1206
f21f3fe0 1207 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1208 contents, rel->r_offset, value,
1209 (bfd_vma) 0);
1210 }
1211 else switch (r_type)
1212 {
dfc5f959
NC		 1213#ifndef OLD_ARM_ABI
1214 case R_ARM_XPC25: /* Arm BLX instruction. */
1215#endif
1216 case R_ARM_PC24: /* Arm B/BL instruction */
1217#ifndef OLD_ARM_ABI
1218 if (r_type == R_ARM_XPC25)
252b5132 1219 {
dfc5f959
NC		 1220 /* Check for Arm calling Arm function. */
1221 /* FIXME: Should we translate the instruction into a BL
1222 instruction instead ? */
1223 if (sym_flags != STT_ARM_TFUNC)
8f615d07 1224 (*_bfd_error_handler) (_("\
dfc5f959 1225%s: Warning: Arm BLX instruction targets Arm function '%s'."),
8f615d07
AM		 1226 bfd_archive_filename (input_bfd),
1227 h ? h->root.root.string : "(local)");
dfc5f959
NC		 1228 }
1229 else
1230#endif
1231 {
1232 /* Check for Arm calling Thumb function. */
1233 if (sym_flags == STT_ARM_TFUNC)
1234 {
1235 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1236 input_section, hit_data, sym_sec, rel->r_offset,
1237 signed_addend, value);
1238 return bfd_reloc_ok;
1239 }
252b5132 1240 }
ba96a88f
NC		 1241
1242 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1243 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1244 {
1245 /* The old way of doing things. Trearing the addend as a
1246 byte sized field and adding in the pipeline offset. */
ba96a88f
NC		 1247 value -= (input_section->output_section->vma
1248 + input_section->output_offset);
1249 value -= rel->r_offset;
1250 value += addend;
f21f3fe0 1251
ba96a88f
NC		 1252 if (! globals->no_pipeline_knowledge)
1253 value -= 8;
1254 }
1255 else
1256 {
1257 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1258 where:
1259 S is the address of the symbol in the relocation.
1260 P is address of the instruction being relocated.
1261 A is the addend (extracted from the instruction) in bytes.
f21f3fe0 1262
ba96a88f
NC		 1263 S is held in 'value'.
1264 P is the base address of the section containing the instruction
1265 plus the offset of the reloc into that section, ie:
1266 (input_section->output_section->vma +
1267 input_section->output_offset +
1268 rel->r_offset).
1269 A is the addend, converted into bytes, ie:
1270 (signed_addend * 4)
1271
1272 Note: None of these operations have knowledge of the pipeline
1273 size of the processor, thus it is up to the assembler to encode
1274 this information into the addend. */
ba96a88f
NC		 1275 value -= (input_section->output_section->vma
1276 + input_section->output_offset);
1277 value -= rel->r_offset;
1278 value += (signed_addend << howto->size);
f21f3fe0 1279
ba96a88f
NC		 1280 /* Previous versions of this code also used to add in the pipeline
1281 offset here. This is wrong because the linker is not supposed
1282 to know about such things, and one day it might change. In order
1283 to support old binaries that need the old behaviour however, so
1284 we attempt to detect which ABI was used to create the reloc. */
1285 if (! globals->no_pipeline_knowledge)
f21f3fe0 1286 {
ba96a88f 1287 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
f21f3fe0 1288
ba96a88f 1289 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1290
ba96a88f
NC		 1291 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1292 value -= 8;
1293 }
1294 }
23080146 1295
dcb5e6e6
NC		 1296 signed_addend = value;
1297 signed_addend >>= howto->rightshift;
9a5aca8c 1298
59f2c4e7
NC		 1299 /* It is not an error for an undefined weak reference to be
1300 out of range. Any program that branches to such a symbol
9a5aca8c
AM		 1301 is going to crash anyway, so there is no point worrying
1302 about getting the destination exactly right. */
59f2c4e7
NC		 1303 if (! h || h->root.type != bfd_link_hash_undefweak)
1304 {
9b485d32 1305 /* Perform a signed range check. */
dcb5e6e6 1306 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC		 1307 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1308 return bfd_reloc_overflow;
1309 }
9a5aca8c 1310
dcb5e6e6
NC		 1311#ifndef OLD_ARM_ABI
1312 /* If necessary set the H bit in the BLX instruction. */
1313 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1314 value = (signed_addend & howto->dst_mask)
1315 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1316 | (1 << 24);
1317 else
1318#endif
1319 value = (signed_addend & howto->dst_mask)
1320 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 1321 break;
f21f3fe0 1322
252b5132
RH		 1323 case R_ARM_ABS32:
1324 value += addend;
1325 if (sym_flags == STT_ARM_TFUNC)
1326 value |= 1;
1327 break;
f21f3fe0 1328
252b5132
RH		 1329 case R_ARM_REL32:
1330 value -= (input_section->output_section->vma
62efb346 1331 + input_section->output_offset + rel->r_offset);
252b5132
RH		 1332 value += addend;
1333 break;
1334 }
f21f3fe0 1335
252b5132
RH		 1336 bfd_put_32 (input_bfd, value, hit_data);
1337 return bfd_reloc_ok;
1338
1339 case R_ARM_ABS8:
1340 value += addend;
1341 if ((long) value > 0x7f || (long) value < -0x80)
1342 return bfd_reloc_overflow;
1343
1344 bfd_put_8 (input_bfd, value, hit_data);
1345 return bfd_reloc_ok;
1346
1347 case R_ARM_ABS16:
1348 value += addend;
1349
1350 if ((long) value > 0x7fff || (long) value < -0x8000)
1351 return bfd_reloc_overflow;
1352
1353 bfd_put_16 (input_bfd, value, hit_data);
1354 return bfd_reloc_ok;
1355
1356 case R_ARM_ABS12:
1357 /* Support ldr and str instruction for the arm */
1358 /* Also thumb b (unconditional branch). ??? Really? */
1359 value += addend;
1360
1361 if ((long) value > 0x7ff || (long) value < -0x800)
1362 return bfd_reloc_overflow;
1363
1364 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1365 bfd_put_32 (input_bfd, value, hit_data);
1366 return bfd_reloc_ok;
1367
1368 case R_ARM_THM_ABS5:
9b485d32 1369 /* Support ldr and str instructions for the thumb. */
252b5132
RH		 1370#ifdef USE_REL
1371 /* Need to refetch addend. */
1372 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1373 /* ??? Need to determine shift amount from operand size. */
1374 addend >>= howto->rightshift;
1375#endif
1376 value += addend;
1377
1378 /* ??? Isn't value unsigned? */
1379 if ((long) value > 0x1f || (long) value < -0x10)
1380 return bfd_reloc_overflow;
1381
1382 /* ??? Value needs to be properly shifted into place first. */
1383 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1384 bfd_put_16 (input_bfd, value, hit_data);
1385 return bfd_reloc_ok;
1386
dfc5f959
NC		 1387#ifndef OLD_ARM_ABI
1388 case R_ARM_THM_XPC22:
1389#endif
252b5132 1390 case R_ARM_THM_PC22:
dfc5f959 1391 /* Thumb BL (branch long instruction). */
252b5132 1392 {
ba96a88f
NC		 1393 bfd_vma relocation;
1394 boolean overflow = false;
1395 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1396 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
252b5132 1397 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
ba96a88f
NC		 1398 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1399 bfd_vma check;
252b5132 1400 bfd_signed_vma signed_check;
252b5132
RH		 1401
1402#ifdef USE_REL
1403 /* Need to refetch the addend and squish the two 11 bit pieces
1404 together. */
1405 {
ba96a88f
NC		 1406 bfd_vma upper = upper_insn & 0x7ff;
1407 bfd_vma lower = lower_insn & 0x7ff;
9b485d32 1408 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
252b5132 1409 addend = (upper << 12) | (lower << 1);
ba96a88f 1410 signed_addend = addend;
252b5132
RH		 1411 }
1412#endif
dfc5f959
NC		 1413#ifndef OLD_ARM_ABI
1414 if (r_type == R_ARM_THM_XPC22)
1415 {
1416 /* Check for Thumb to Thumb call. */
1417 /* FIXME: Should we translate the instruction into a BL
1418 instruction instead ? */
1419 if (sym_flags == STT_ARM_TFUNC)
8f615d07 1420 (*_bfd_error_handler) (_("\
dfc5f959 1421%s: Warning: Thumb BLX instruction targets thumb function '%s'."),
8f615d07
AM		 1422 bfd_archive_filename (input_bfd),
1423 h ? h->root.root.string : "(local)");
dfc5f959
NC		 1424 }
1425 else
1426#endif
252b5132 1427 {
dfc5f959
NC		 1428 /* If it is not a call to Thumb, assume call to Arm.
1429 If it is a call relative to a section name, then it is not a
1430 function call at all, but rather a long jump. */
1431 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1432 {
1433 if (elf32_thumb_to_arm_stub
1434 (info, sym_name, input_bfd, output_bfd, input_section,
1435 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1436 return bfd_reloc_ok;
1437 else
1438 return bfd_reloc_dangerous;
1439 }
252b5132 1440 }
f21f3fe0 1441
ba96a88f 1442 relocation = value + signed_addend;
f21f3fe0 1443
252b5132 1444 relocation -= (input_section->output_section->vma
ba96a88f
NC		 1445 + input_section->output_offset
1446 + rel->r_offset);
9a5aca8c 1447
ba96a88f
NC		 1448 if (! globals->no_pipeline_knowledge)
1449 {
9b485d32 1450 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
9a5aca8c 1451
ba96a88f 1452 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1453
ba96a88f
NC		 1454 /* Previous versions of this code also used to add in the pipline
1455 offset here. This is wrong because the linker is not supposed
1456 to know about such things, and one day it might change. In order
1457 to support old binaries that need the old behaviour however, so
1458 we attempt to detect which ABI was used to create the reloc. */
1459 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1460 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1461 || i_ehdrp->e_ident[EI_OSABI] == 0)
1462 relocation += 4;
1463 }
f21f3fe0 1464
252b5132
RH		 1465 check = relocation >> howto->rightshift;
1466
1467 /* If this is a signed value, the rightshift just dropped
1468 leading 1 bits (assuming twos complement). */
1469 if ((bfd_signed_vma) relocation >= 0)
1470 signed_check = check;
1471 else
1472 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1473
252b5132 1474 /* Assumes two's complement. */
ba96a88f 1475 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
252b5132
RH		 1476 overflow = true;
1477
1478 /* Put RELOCATION back into the insn. */
1479 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1480 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1481
df425bc0 1482#ifndef OLD_ARM_ABI
4f3c3dbb
NC		 1483 if (r_type == R_ARM_THM_XPC22
1484 && ((lower_insn & 0x1800) == 0x0800))
1485 /* Remove bit zero of the adjusted offset. Bit zero can only be
1486 set if the upper insn is at a half-word boundary, since the
1487 destination address, an ARM instruction, must always be on a
1488 word boundary. The semantics of the BLX (1) instruction, however,
1489 are that bit zero in the offset must always be zero, and the
1490 corresponding bit one in the target address will be set from bit
1491 one of the source address. */
1492 lower_insn &= ~1;
99e4ae17 1493#endif
252b5132
RH		 1494 /* Put the relocated value back in the object file: */
1495 bfd_put_16 (input_bfd, upper_insn, hit_data);
1496 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1497
1498 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1499 }
1500 break;
1501
1502 case R_ARM_GNU_VTINHERIT:
1503 case R_ARM_GNU_VTENTRY:
1504 return bfd_reloc_ok;
1505
1506 case R_ARM_COPY:
1507 return bfd_reloc_notsupported;
1508
1509 case R_ARM_GLOB_DAT:
1510 return bfd_reloc_notsupported;
1511
1512 case R_ARM_JUMP_SLOT:
1513 return bfd_reloc_notsupported;
1514
1515 case R_ARM_RELATIVE:
1516 return bfd_reloc_notsupported;
1517
1518 case R_ARM_GOTOFF:
1519 /* Relocation is relative to the start of the
1520 global offset table. */
1521
1522 BFD_ASSERT (sgot != NULL);
1523 if (sgot == NULL)
1524 return bfd_reloc_notsupported;
9a5aca8c 1525
252b5132
RH		 1526 /* Note that sgot->output_offset is not involved in this
1527 calculation. We always want the start of .got. If we
1528 define _GLOBAL_OFFSET_TABLE in a different way, as is
1529 permitted by the ABI, we might have to change this
9b485d32 1530 calculation. */
252b5132 1531 value -= sgot->output_section->vma;
f21f3fe0 1532 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1533 contents, rel->r_offset, value,
1534 (bfd_vma) 0);
252b5132
RH		 1535
1536 case R_ARM_GOTPC:
a7c10850 1537 /* Use global offset table as symbol value. */
252b5132 1538 BFD_ASSERT (sgot != NULL);
f21f3fe0 1539
252b5132
RH		 1540 if (sgot == NULL)
1541 return bfd_reloc_notsupported;
1542
1543 value = sgot->output_section->vma;
f21f3fe0 1544 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1545 contents, rel->r_offset, value,
1546 (bfd_vma) 0);
f21f3fe0 1547
252b5132
RH		 1548 case R_ARM_GOT32:
1549 /* Relocation is to the entry for this symbol in the
9b485d32 1550 global offset table. */
252b5132
RH		 1551 if (sgot == NULL)
1552 return bfd_reloc_notsupported;
f21f3fe0 1553
252b5132
RH		 1554 if (h != NULL)
1555 {
1556 bfd_vma off;
f21f3fe0 1557
252b5132
RH		 1558 off = h->got.offset;
1559 BFD_ASSERT (off != (bfd_vma) -1);
f21f3fe0 1560
252b5132
RH		 1561 if (!elf_hash_table (info)->dynamic_sections_created ||
1562 (info->shared && (info->symbolic || h->dynindx == -1)
1563 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1564 {
1565 /* This is actually a static link, or it is a -Bsymbolic link
1566 and the symbol is defined locally. We must initialize this
1567 entry in the global offset table. Since the offset must
1568 always be a multiple of 4, we use the least significant bit
1569 to record whether we have initialized it already.
f21f3fe0 1570
252b5132 1571 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1572 entry to initialize the value. This is done in the
9b485d32 1573 finish_dynamic_symbol routine. */
252b5132
RH		 1574 if ((off & 1) != 0)
1575 off &= ~1;
1576 else
1577 {
1578 bfd_put_32 (output_bfd, value, sgot->contents + off);
1579 h->got.offset |= 1;
1580 }
1581 }
f21f3fe0 1582
252b5132
RH		 1583 value = sgot->output_offset + off;
1584 }
1585 else
1586 {
1587 bfd_vma off;
f21f3fe0 1588
252b5132
RH		 1589 BFD_ASSERT (local_got_offsets != NULL &&
1590 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1591
252b5132 1592 off = local_got_offsets[r_symndx];
f21f3fe0 1593
252b5132
RH		 1594 /* The offset must always be a multiple of 4. We use the
1595 least significant bit to record whether we have already
9b485d32 1596 generated the necessary reloc. */
252b5132
RH		 1597 if ((off & 1) != 0)
1598 off &= ~1;
1599 else
1600 {
1601 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1602
252b5132
RH		 1603 if (info->shared)
1604 {
1605 asection * srelgot;
1606 Elf_Internal_Rel outrel;
f21f3fe0 1607
252b5132
RH		 1608 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1609 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1610
252b5132 1611 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1612 + sgot->output_offset
252b5132
RH		 1613 + off);
1614 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1615 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1616 (((Elf32_External_Rel *)
1617 srelgot->contents)
1618 + srelgot->reloc_count));
1619 ++srelgot->reloc_count;
1620 }
f21f3fe0 1621
252b5132
RH		 1622 local_got_offsets[r_symndx] |= 1;
1623 }
f21f3fe0 1624
252b5132
RH		 1625 value = sgot->output_offset + off;
1626 }
9a5aca8c 1627
f21f3fe0 1628 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1629 contents, rel->r_offset, value,
1630 (bfd_vma) 0);
f21f3fe0 1631
252b5132
RH		 1632 case R_ARM_PLT32:
1633 /* Relocation is to the entry for this symbol in the
1634 procedure linkage table. */
1635
1636 /* Resolve a PLT32 reloc against a local symbol directly,
9b485d32 1637 without using the procedure linkage table. */
252b5132
RH		 1638 if (h == NULL)
1639 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1640 contents, rel->r_offset, value,
1641 (bfd_vma) 0);
252b5132
RH		 1642
1643 if (h->plt.offset == (bfd_vma) -1)
1644 /* We didn't make a PLT entry for this symbol. This
1645 happens when statically linking PIC code, or when
1646 using -Bsymbolic. */
1647 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1648 contents, rel->r_offset, value,
1649 (bfd_vma) 0);
1650
1651 BFD_ASSERT(splt != NULL);
1652 if (splt == NULL)
1653 return bfd_reloc_notsupported;
1654
1655 value = (splt->output_section->vma
1656 + splt->output_offset
1657 + h->plt.offset);
1658 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1659 contents, rel->r_offset, value,
1660 (bfd_vma) 0);
f21f3fe0 1661
252b5132
RH		 1662 case R_ARM_SBREL32:
1663 return bfd_reloc_notsupported;
1664
1665 case R_ARM_AMP_VCALL9:
1666 return bfd_reloc_notsupported;
1667
1668 case R_ARM_RSBREL32:
1669 return bfd_reloc_notsupported;
1670
1671 case R_ARM_THM_RPC22:
1672 return bfd_reloc_notsupported;
1673
1674 case R_ARM_RREL32:
1675 return bfd_reloc_notsupported;
1676
1677 case R_ARM_RABS32:
1678 return bfd_reloc_notsupported;
1679
1680 case R_ARM_RPC24:
1681 return bfd_reloc_notsupported;
1682
1683 case R_ARM_RBASE:
1684 return bfd_reloc_notsupported;
1685
1686 default:
1687 return bfd_reloc_notsupported;
1688 }
1689}
1690
98c1d4aa
NC		 1691#ifdef USE_REL
1692/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1693static void
1694arm_add_to_rel (abfd, address, howto, increment)
1695 bfd * abfd;
59f2c4e7 1696 bfd_byte * address;
98c1d4aa
NC		 1697 reloc_howto_type * howto;
1698 bfd_signed_vma increment;
1699{
98c1d4aa
NC		 1700 bfd_signed_vma addend;
1701
9a5aca8c 1702 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 1703 {
9a5aca8c
AM		 1704 int upper_insn, lower_insn;
1705 int upper, lower;
98c1d4aa 1706
9a5aca8c
AM		 1707 upper_insn = bfd_get_16 (abfd, address);
1708 lower_insn = bfd_get_16 (abfd, address + 2);
1709 upper = upper_insn & 0x7ff;
1710 lower = lower_insn & 0x7ff;
1711
1712 addend = (upper << 12) | (lower << 1);
ddda4409 1713 addend += increment;
9a5aca8c 1714 addend >>= 1;
98c1d4aa 1715
9a5aca8c
AM		 1716 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1717 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1718
dc810e39
AM		 1719 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
1720 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM		 1721 }
1722 else
1723 {
1724 bfd_vma contents;
1725
1726 contents = bfd_get_32 (abfd, address);
1727
1728 /* Get the (signed) value from the instruction. */
1729 addend = contents & howto->src_mask;
1730 if (addend & ((howto->src_mask + 1) >> 1))
1731 {
1732 bfd_signed_vma mask;
1733
1734 mask = -1;
1735 mask &= ~ howto->src_mask;
1736 addend |= mask;
1737 }
1738
1739 /* Add in the increment, (which is a byte value). */
1740 switch (howto->type)
1741 {
1742 default:
1743 addend += increment;
1744 break;
1745
1746 case R_ARM_PC24:
1747 addend <<= howto->size;
dc810e39 1748 addend += increment;
9a5aca8c
AM		 1749
1750 /* Should we check for overflow here ? */
1751
1752 /* Drop any undesired bits. */
1753 addend >>= howto->rightshift;
1754 break;
1755 }
1756
1757 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1758
1759 bfd_put_32 (abfd, contents, address);
ddda4409 1760 }
98c1d4aa
NC		 1761}
1762#endif /* USE_REL */
252b5132
RH		 1763
1764/* Relocate an ARM ELF section. */
1765static boolean
1766elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1767 contents, relocs, local_syms, local_sections)
1768 bfd * output_bfd;
1769 struct bfd_link_info * info;
1770 bfd * input_bfd;
1771 asection * input_section;
1772 bfd_byte * contents;
1773 Elf_Internal_Rela * relocs;
1774 Elf_Internal_Sym * local_syms;
1775 asection ** local_sections;
1776{
1777 Elf_Internal_Shdr * symtab_hdr;
1778 struct elf_link_hash_entry ** sym_hashes;
1779 Elf_Internal_Rela * rel;
1780 Elf_Internal_Rela * relend;
1781 const char * name;
1782
1783 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1784 sym_hashes = elf_sym_hashes (input_bfd);
1785
1786 rel = relocs;
1787 relend = relocs + input_section->reloc_count;
1788 for (; rel < relend; rel++)
1789 {
ba96a88f
NC		 1790 int r_type;
1791 reloc_howto_type * howto;
1792 unsigned long r_symndx;
1793 Elf_Internal_Sym * sym;
1794 asection * sec;
252b5132 1795 struct elf_link_hash_entry * h;
ba96a88f
NC		 1796 bfd_vma relocation;
1797 bfd_reloc_status_type r;
1798 arelent bfd_reloc;
f21f3fe0 1799
252b5132 1800 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 1801 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1802
ba96a88f
NC		 1803 if ( r_type == R_ARM_GNU_VTENTRY
1804 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 1805 continue;
1806
dc810e39
AM		 1807#ifdef USE_REL
1808 elf32_arm_info_to_howto (input_bfd, & bfd_reloc,
1809 (Elf_Internal_Rel *) rel);
1810#else
1811 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1812#endif
ba96a88f 1813 howto = bfd_reloc.howto;
252b5132
RH		 1814
1815 if (info->relocateable)
1816 {
1817 /* This is a relocateable link. We don't have to change
1818 anything, unless the reloc is against a section symbol,
1819 in which case we have to adjust according to where the
1820 section symbol winds up in the output section. */
1821 if (r_symndx < symtab_hdr->sh_info)
1822 {
1823 sym = local_syms + r_symndx;
1824 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1825 {
1826 sec = local_sections[r_symndx];
1827#ifdef USE_REL
98c1d4aa 1828 arm_add_to_rel (input_bfd, contents + rel->r_offset,
dc810e39
AM		 1829 howto,
1830 (bfd_signed_vma) (sec->output_offset
1831 + sym->st_value));
252b5132 1832#else
5fb1c3f2 1833 rel->r_addend += (sec->output_offset + sym->st_value);
252b5132
RH		 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];
f8df10f4 1850#ifdef USE_REL
252b5132
RH		 1851 relocation = (sec->output_section->vma
1852 + sec->output_offset
1853 + sym->st_value);
f8df10f4
JJ		 1854 if ((sec->flags & SEC_MERGE)
1855 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1856 {
1857 asection *msec;
1858 bfd_vma addend, value;
1859
1860 if (howto->rightshift)
1861 {
1862 (*_bfd_error_handler)
1863 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
1864 bfd_archive_filename (input_bfd),
1865 bfd_get_section_name (input_bfd, input_section),
1866 (long) rel->r_offset, howto->name);
1867 return false;
1868 }
1869
1870 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
1871
1872 /* Get the (signed) value from the instruction. */
1873 addend = value & howto->src_mask;
1874 if (addend & ((howto->src_mask + 1) >> 1))
1875 {
1876 bfd_signed_vma mask;
1877
1878 mask = -1;
1879 mask &= ~ howto->src_mask;
1880 addend |= mask;
1881 }
1882 msec = sec;
1883 addend =
c629eae0 1884 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
f8df10f4
JJ		 1885 - relocation;
1886 addend += msec->output_section->vma + msec->output_offset;
1887 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
1888 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
1889 }
1890#else
1891 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1892#endif
252b5132
RH		 1893 }
1894 else
1895 {
1896 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9b485d32
NC		 1897
1898 while ( h->root.type == bfd_link_hash_indirect
252b5132
RH		 1899 || h->root.type == bfd_link_hash_warning)
1900 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9b485d32
NC		 1901
1902 if ( h->root.type == bfd_link_hash_defined
252b5132
RH		 1903 || h->root.type == bfd_link_hash_defweak)
1904 {
780a67af 1905 int relocation_needed = 1;
f21f3fe0 1906
780a67af 1907 sec = h->root.u.def.section;
f21f3fe0 1908
252b5132 1909 /* In these cases, we don't need the relocation value.
f21f3fe0 1910 We check specially because in some obscure cases
9b485d32 1911 sec->output_section will be NULL. */
252b5132
RH		 1912 switch (r_type)
1913 {
1914 case R_ARM_PC24:
1915 case R_ARM_ABS32:
6a360bf4 1916 case R_ARM_THM_PC22:
252b5132
RH		 1917 if (info->shared
1918 && (
99e4ae17 1919 (!info->symbolic && h->dynindx != -1)
97eaf9de 1920 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132 1921 )
05924f36
PB		 1922 && ((input_section->flags & SEC_ALLOC) != 0
1923 /* DWARF will emit R_ARM_ABS32 relocations in its
1924 sections against symbols defined externally
1925 in shared libraries. We can't do anything
1926 with them here. */
1927 || ((input_section->flags & SEC_DEBUGGING) != 0
1928 && (h->elf_link_hash_flags
1929 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132 1930 )
780a67af 1931 relocation_needed = 0;
252b5132 1932 break;
f21f3fe0 1933
252b5132 1934 case R_ARM_GOTPC:
780a67af 1935 relocation_needed = 0;
252b5132 1936 break;
f21f3fe0 1937
252b5132
RH		 1938 case R_ARM_GOT32:
1939 if (elf_hash_table(info)->dynamic_sections_created
1940 && (!info->shared
1941 || (!info->symbolic && h->dynindx != -1)
1942 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1943 )
1944 )
780a67af 1945 relocation_needed = 0;
252b5132 1946 break;
f21f3fe0 1947
252b5132
RH		 1948 case R_ARM_PLT32:
1949 if (h->plt.offset != (bfd_vma)-1)
780a67af 1950 relocation_needed = 0;
252b5132 1951 break;
f21f3fe0 1952
252b5132
RH		 1953 default:
1954 if (sec->output_section == NULL)
1955 {
1956 (*_bfd_error_handler)
6a360bf4
NC		 1957 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
1958 bfd_archive_filename (input_bfd),
1959 r_type,
1960 h->root.root.string,
252b5132 1961 bfd_get_section_name (input_bfd, input_section));
780a67af 1962 relocation_needed = 0;
252b5132
RH		 1963 }
1964 }
780a67af
NC		 1965
1966 if (relocation_needed)
1967 relocation = h->root.u.def.value
1968 + sec->output_section->vma
1969 + sec->output_offset;
1970 else
1971 relocation = 0;
252b5132
RH		 1972 }
1973 else if (h->root.type == bfd_link_hash_undefweak)
1974 relocation = 0;
3a27a730
L		 1975 else if (info->shared && !info->symbolic
1976 && !info->no_undefined
1977 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
a72747a3 1978 relocation = 0;
252b5132
RH		 1979 else
1980 {
1981 if (!((*info->callbacks->undefined_symbol)
1982 (info, h->root.root.string, input_bfd,
5cc7c785 1983 input_section, rel->r_offset,
3a27a730
L		 1984 (!info->shared || info->no_undefined
1985 || ELF_ST_VISIBILITY (h->other)))))
252b5132
RH		 1986 return false;
1987 relocation = 0;
1988 }
1989 }
1990
1991 if (h != NULL)
1992 name = h->root.root.string;
1993 else
1994 {
1995 name = (bfd_elf_string_from_elf_section
1996 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1997 if (name == NULL || *name == '\0')
1998 name = bfd_section_name (input_bfd, sec);
1999 }
f21f3fe0 2000
252b5132
RH		 2001 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2002 input_section, contents, rel,
2003 relocation, info, sec, name,
2004 (h ? ELF_ST_TYPE (h->type) :
780a67af 2005 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH		 2006
2007 if (r != bfd_reloc_ok)
2008 {
2009 const char * msg = (const char *) 0;
2010
2011 switch (r)
2012 {
2013 case bfd_reloc_overflow:
cf919dfd
PB		 2014 /* If the overflowing reloc was to an undefined symbol,
2015 we have already printed one error message and there
2016 is no point complaining again. */
2017 if ((! h ||
2018 h->root.type != bfd_link_hash_undefined)
2019 && (!((*info->callbacks->reloc_overflow)
2020 (info, name, howto->name, (bfd_vma) 0,
2021 input_bfd, input_section, rel->r_offset))))
2022 return false;
252b5132
RH		 2023 break;
2024
2025 case bfd_reloc_undefined:
2026 if (!((*info->callbacks->undefined_symbol)
2027 (info, name, input_bfd, input_section,
5cc7c785 2028 rel->r_offset, true)))
252b5132
RH		 2029 return false;
2030 break;
2031
2032 case bfd_reloc_outofrange:
9b485d32 2033 msg = _("internal error: out of range error");
252b5132
RH		 2034 goto common_error;
2035
2036 case bfd_reloc_notsupported:
9b485d32 2037 msg = _("internal error: unsupported relocation error");
252b5132
RH		 2038 goto common_error;
2039
2040 case bfd_reloc_dangerous:
9b485d32 2041 msg = _("internal error: dangerous error");
252b5132
RH		 2042 goto common_error;
2043
2044 default:
9b485d32 2045 msg = _("internal error: unknown error");
252b5132
RH		 2046 /* fall through */
2047
2048 common_error:
2049 if (!((*info->callbacks->warning)
2050 (info, msg, name, input_bfd, input_section,
2051 rel->r_offset)))
2052 return false;
2053 break;
2054 }
2055 }
2056 }
2057
2058 return true;
2059}
2060
fc830a83 2061/* Function to keep ARM specific flags in the ELF header. */
252b5132
RH		 2062static boolean
2063elf32_arm_set_private_flags (abfd, flags)
2064 bfd *abfd;
2065 flagword flags;
2066{
2067 if (elf_flags_init (abfd)
2068 && elf_elfheader (abfd)->e_flags != flags)
2069 {
fc830a83
NC		 2070 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2071 {
fd2ec330 2072 if (flags & EF_ARM_INTERWORK)
8f615d07 2073 (*_bfd_error_handler) (_("\
252b5132 2074Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
8f615d07 2075 bfd_archive_filename (abfd));
fc830a83 2076 else
63b0f745 2077 _bfd_error_handler (_("\
252b5132 2078Warning: Clearing the interwork flag of %s due to outside request"),
63b0f745 2079 bfd_archive_filename (abfd));
fc830a83 2080 }
252b5132
RH		 2081 }
2082 else
2083 {
2084 elf_elfheader (abfd)->e_flags = flags;
2085 elf_flags_init (abfd) = true;
2086 }
2087
2088 return true;
2089}
2090
fc830a83 2091/* Copy backend specific data from one object module to another. */
9b485d32 2092
252b5132
RH		 2093static boolean
2094elf32_arm_copy_private_bfd_data (ibfd, obfd)
2095 bfd *ibfd;
2096 bfd *obfd;
2097{
2098 flagword in_flags;
2099 flagword out_flags;
2100
fc830a83 2101 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132
RH		 2102 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2103 return true;
2104
fc830a83 2105 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH		 2106 out_flags = elf_elfheader (obfd)->e_flags;
2107
fc830a83
NC		 2108 if (elf_flags_init (obfd)
2109 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2110 && in_flags != out_flags)
252b5132 2111 {
252b5132 2112 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 2113 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
252b5132
RH		 2114 return false;
2115
2116 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 2117 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
252b5132
RH		 2118 return false;
2119
2120 /* If the src and dest have different interworking flags
2121 then turn off the interworking bit. */
fd2ec330 2122 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 2123 {
fd2ec330 2124 if (out_flags & EF_ARM_INTERWORK)
63b0f745 2125 _bfd_error_handler (_("\
252b5132 2126Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
06317a27 2127 bfd_get_filename (obfd),
63b0f745 2128 bfd_archive_filename (ibfd));
252b5132 2129
fd2ec330 2130 in_flags &= ~EF_ARM_INTERWORK;
252b5132 2131 }
1006ba19
PB		 2132
2133 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB		 2134 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2135 in_flags &= ~EF_ARM_PIC;
252b5132
RH		 2136 }
2137
2138 elf_elfheader (obfd)->e_flags = in_flags;
2139 elf_flags_init (obfd) = true;
2140
2141 return true;
2142}
2143
2144/* Merge backend specific data from an object file to the output
2145 object file when linking. */
9b485d32 2146
252b5132
RH		 2147static boolean
2148elf32_arm_merge_private_bfd_data (ibfd, obfd)
fc830a83
NC		 2149 bfd * ibfd;
2150 bfd * obfd;
252b5132
RH		 2151{
2152 flagword out_flags;
2153 flagword in_flags;
1006ba19 2154 boolean flags_compatible = true;
cf919dfd
PB		 2155 boolean null_input_bfd = true;
2156 asection *sec;
252b5132 2157
9b485d32 2158 /* Check if we have the same endianess. */
1fe494a5
NC		 2159 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2160 return false;
2161
252b5132
RH		 2162 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2163 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2164 return true;
2165
252b5132
RH		 2166 /* The input BFD must have had its flags initialised. */
2167 /* The following seems bogus to me -- The flags are initialized in
2168 the assembler but I don't think an elf_flags_init field is
9b485d32 2169 written into the object. */
252b5132
RH		 2170 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2171
2172 in_flags = elf_elfheader (ibfd)->e_flags;
2173 out_flags = elf_elfheader (obfd)->e_flags;
2174
2175 if (!elf_flags_init (obfd))
2176 {
fe077fa6
NC		 2177 /* If the input is the default architecture and had the default
2178 flags then do not bother setting the flags for the output
2179 architecture, instead allow future merges to do this. If no
2180 future merges ever set these flags then they will retain their
2181 uninitialised values, which surprise surprise, correspond
252b5132 2182 to the default values. */
fe077fa6
NC		 2183 if (bfd_get_arch_info (ibfd)->the_default
2184 && elf_elfheader (ibfd)->e_flags == 0)
252b5132
RH		 2185 return true;
2186
2187 elf_flags_init (obfd) = true;
2188 elf_elfheader (obfd)->e_flags = in_flags;
2189
2190 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2191 && bfd_get_arch_info (obfd)->the_default)
2192 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2193
2194 return true;
2195 }
2196
1006ba19 2197 /* Identical flags must be compatible. */
252b5132
RH		 2198 if (in_flags == out_flags)
2199 return true;
2200
cf919dfd
PB		 2201 /* Check to see if the input BFD actually contains any sections.
2202 If not, its flags may not have been initialised either, but it cannot
2203 actually cause any incompatibility. */
2204 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2205 {
2206 /* Ignore synthetic glue sections. */
2207 if (strcmp (sec->name, ".glue_7")
2208 && strcmp (sec->name, ".glue_7t"))
2209 {
2210 null_input_bfd = false;
2211 break;
2212 }
2213 }
2214 if (null_input_bfd)
2215 return true;
2216
252b5132 2217 /* Complain about various flag mismatches. */
fc830a83
NC		 2218 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2219 {
63b0f745 2220 _bfd_error_handler (_("\
fc830a83 2221Error: %s compiled for EABI version %d, whereas %s is compiled for version %d"),
63b0f745
NC		 2222 bfd_archive_filename (ibfd),
2223 (in_flags & EF_ARM_EABIMASK) >> 24,
06317a27 2224 bfd_get_filename (obfd),
63b0f745 2225 (out_flags & EF_ARM_EABIMASK) >> 24);
1006ba19 2226 return false;
fc830a83 2227 }
252b5132 2228
1006ba19
PB		 2229 /* Not sure what needs to be checked for EABI versions >= 1. */
2230 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2231 {
fd2ec330 2232 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19 2233 {
63b0f745 2234 _bfd_error_handler (_("\
252b5132 2235Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
63b0f745
NC		 2236 bfd_archive_filename (ibfd),
2237 in_flags & EF_ARM_APCS_26 ? 26 : 32,
06317a27 2238 bfd_get_filename (obfd),
63b0f745 2239 out_flags & EF_ARM_APCS_26 ? 26 : 32);
1006ba19
PB		 2240 flags_compatible = false;
2241 }
252b5132 2242
fd2ec330 2243 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19 2244 {
63b0f745
NC		 2245 char *s1 = in_flags & EF_ARM_APCS_FLOAT ? _("float") : _("integer");
2246 char *s2 = out_flags & EF_ARM_APCS_FLOAT ? _("float") : _("integer");
2247
2248 _bfd_error_handler (_("\
252b5132 2249Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
63b0f745 2250 bfd_archive_filename (ibfd), s1,
06317a27 2251 bfd_get_filename (obfd), s2);
1006ba19
PB		 2252 flags_compatible = false;
2253 }
252b5132 2254
fd2ec330
PB		 2255#ifdef EF_ARM_SOFT_FLOAT
2256 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
1006ba19 2257 {
63b0f745 2258 char *s1 = in_flags & EF_ARM_SOFT_FLOAT ? _("soft") : _("hard");
8f615d07 2259 char *s2 = out_flags & EF_ARM_SOFT_FLOAT ? _("soft") : _("hard");
63b0f745
NC		 2260
2261 _bfd_error_handler (_ ("\
1006ba19 2262Error: %s uses %s floating point, whereas %s uses %s floating point"),
63b0f745 2263 bfd_archive_filename (ibfd), s1,
06317a27 2264 bfd_get_filename (obfd), s2);
1006ba19
PB		 2265 flags_compatible = false;
2266 }
ee43f35e 2267#endif
252b5132 2268
1006ba19 2269 /* Interworking mismatch is only a warning. */
fd2ec330 2270 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8f615d07 2271 {
e3c8793a
NC		 2272 if (in_flags & EF_ARM_INTERWORK)
2273 {
2274 _bfd_error_handler (_("\
2275Warning: %s supports interworking, whereas %s does not"),
2276 bfd_archive_filename (ibfd),
2277 bfd_get_filename (obfd));
2278 }
2279 else
2280 {
2281 _bfd_error_handler (_("\
2282Warning: %s does not support interworking, whereas %s does"),
2283 bfd_archive_filename (ibfd),
2284 bfd_get_filename (obfd));
2285 }
8f615d07 2286 }
252b5132 2287 }
63b0f745 2288
1006ba19 2289 return flags_compatible;
252b5132
RH		 2290}
2291
9b485d32
NC		 2292/* Display the flags field. */
2293
252b5132
RH		 2294static boolean
2295elf32_arm_print_private_bfd_data (abfd, ptr)
2296 bfd *abfd;
2297 PTR ptr;
2298{
fc830a83
NC		 2299 FILE * file = (FILE *) ptr;
2300 unsigned long flags;
252b5132
RH		 2301
2302 BFD_ASSERT (abfd != NULL && ptr != NULL);
2303
2304 /* Print normal ELF private data. */
2305 _bfd_elf_print_private_bfd_data (abfd, ptr);
2306
fc830a83 2307 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC		 2308 /* Ignore init flag - it may not be set, despite the flags field
2309 containing valid data. */
252b5132
RH		 2310
2311 /* xgettext:c-format */
9b485d32 2312 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 2313
fc830a83
NC		 2314 switch (EF_ARM_EABI_VERSION (flags))
2315 {
2316 case EF_ARM_EABI_UNKNOWN:
2317 /* The following flag bits are GNU extenstions and not part of the
2318 official ARM ELF extended ABI. Hence they are only decoded if
2319 the EABI version is not set. */
fd2ec330 2320 if (flags & EF_ARM_INTERWORK)
9b485d32 2321 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 2322
fd2ec330 2323 if (flags & EF_ARM_APCS_26)
9b485d32 2324 fprintf (file, _(" [APCS-26]"));
fc830a83 2325 else
9b485d32 2326 fprintf (file, _(" [APCS-32]"));
9a5aca8c 2327
fd2ec330 2328 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 2329 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 2330
fd2ec330 2331 if (flags & EF_ARM_PIC)
9b485d32 2332 fprintf (file, _(" [position independent]"));
fc830a83 2333
fd2ec330 2334 if (flags & EF_ARM_NEW_ABI)
9b485d32 2335 fprintf (file, _(" [new ABI]"));
9a5aca8c 2336
fd2ec330 2337 if (flags & EF_ARM_OLD_ABI)
9b485d32 2338 fprintf (file, _(" [old ABI]"));
9a5aca8c 2339
fd2ec330 2340 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 2341 fprintf (file, _(" [software FP]"));
9a5aca8c 2342
fd2ec330
PB		 2343 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT | EF_ARM_PIC
2344 | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | EF_ARM_SOFT_FLOAT);
fc830a83 2345 break;
9a5aca8c 2346
fc830a83 2347 case EF_ARM_EABI_VER1:
9b485d32 2348 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 2349
fc830a83 2350 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 2351 fprintf (file, _(" [sorted symbol table]"));
fc830a83 2352 else
9b485d32 2353 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 2354
fc830a83
NC		 2355 flags &= ~ EF_ARM_SYMSARESORTED;
2356 break;
9a5aca8c 2357
fd2ec330
PB		 2358 case EF_ARM_EABI_VER2:
2359 fprintf (file, _(" [Version2 EABI]"));
2360
2361 if (flags & EF_ARM_SYMSARESORTED)
2362 fprintf (file, _(" [sorted symbol table]"));
2363 else
2364 fprintf (file, _(" [unsorted symbol table]"));
2365
2366 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2367 fprintf (file, _(" [dynamic symbols use segment index]"));
2368
2369 if (flags & EF_ARM_MAPSYMSFIRST)
2370 fprintf (file, _(" [mapping symbols precede others]"));
2371
99e4ae17 2372 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB		 2373 | EF_ARM_MAPSYMSFIRST);
2374 break;
2375
fc830a83 2376 default:
9b485d32 2377 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC		 2378 break;
2379 }
252b5132 2380
fc830a83 2381 flags &= ~ EF_ARM_EABIMASK;
252b5132 2382
fc830a83 2383 if (flags & EF_ARM_RELEXEC)
9b485d32 2384 fprintf (file, _(" [relocatable executable]"));
252b5132 2385
fc830a83 2386 if (flags & EF_ARM_HASENTRY)
9b485d32 2387 fprintf (file, _(" [has entry point]"));
252b5132 2388
fc830a83
NC		 2389 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2390
2391 if (flags)
9b485d32 2392 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 2393
252b5132
RH		 2394 fputc ('\n', file);
2395
2396 return true;
2397}
2398
2399static int
2400elf32_arm_get_symbol_type (elf_sym, type)
2401 Elf_Internal_Sym * elf_sym;
2402 int type;
2403{
2f0ca46a
NC		 2404 switch (ELF_ST_TYPE (elf_sym->st_info))
2405 {
2406 case STT_ARM_TFUNC:
2407 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 2408
2f0ca46a
NC		 2409 case STT_ARM_16BIT:
2410 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2411 This allows us to distinguish between data used by Thumb instructions
2412 and non-data (which is probably code) inside Thumb regions of an
2413 executable. */
2414 if (type != STT_OBJECT)
2415 return ELF_ST_TYPE (elf_sym->st_info);
2416 break;
9a5aca8c 2417
ce855c42
NC		 2418 default:
2419 break;
2f0ca46a
NC		 2420 }
2421
2422 return type;
252b5132 2423}
f21f3fe0 2424
252b5132
RH		 2425static asection *
2426elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2427 bfd *abfd;
5f771d47 2428 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2429 Elf_Internal_Rela *rel;
2430 struct elf_link_hash_entry *h;
2431 Elf_Internal_Sym *sym;
2432{
2433 if (h != NULL)
2434 {
2435 switch (ELF32_R_TYPE (rel->r_info))
2436 {
2437 case R_ARM_GNU_VTINHERIT:
2438 case R_ARM_GNU_VTENTRY:
2439 break;
2440
2441 default:
2442 switch (h->root.type)
2443 {
2444 case bfd_link_hash_defined:
2445 case bfd_link_hash_defweak:
2446 return h->root.u.def.section;
2447
2448 case bfd_link_hash_common:
2449 return h->root.u.c.p->section;
e049a0de
ILT		 2450
2451 default:
2452 break;
252b5132
RH		 2453 }
2454 }
2455 }
2456 else
2457 {
9ad5cbcf
AM		 2458 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2459 }
2460
252b5132
RH		 2461 return NULL;
2462}
2463
780a67af
NC		 2464/* Update the got entry reference counts for the section being removed. */
2465
252b5132
RH		 2466static boolean
2467elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 2468 bfd *abfd ATTRIBUTE_UNUSED;
2469 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2470 asection *sec ATTRIBUTE_UNUSED;
2471 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2472{
780a67af 2473 /* We don't support garbage collection of GOT and PLT relocs yet. */
252b5132
RH		 2474 return true;
2475}
2476
780a67af
NC		 2477/* Look through the relocs for a section during the first phase. */
2478
252b5132
RH		 2479static boolean
2480elf32_arm_check_relocs (abfd, info, sec, relocs)
2481 bfd * abfd;
2482 struct bfd_link_info * info;
2483 asection * sec;
2484 const Elf_Internal_Rela * relocs;
2485{
2486 Elf_Internal_Shdr * symtab_hdr;
2487 struct elf_link_hash_entry ** sym_hashes;
2488 struct elf_link_hash_entry ** sym_hashes_end;
2489 const Elf_Internal_Rela * rel;
2490 const Elf_Internal_Rela * rel_end;
2491 bfd * dynobj;
2492 asection * sgot, *srelgot, *sreloc;
2493 bfd_vma * local_got_offsets;
9a5aca8c 2494
252b5132
RH		 2495 if (info->relocateable)
2496 return true;
9a5aca8c 2497
252b5132 2498 sgot = srelgot = sreloc = NULL;
9a5aca8c 2499
252b5132
RH		 2500 dynobj = elf_hash_table (info)->dynobj;
2501 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2502
252b5132
RH		 2503 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2504 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC		 2505 sym_hashes_end = sym_hashes
2506 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2507
252b5132
RH		 2508 if (!elf_bad_symtab (abfd))
2509 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 2510
252b5132
RH		 2511 rel_end = relocs + sec->reloc_count;
2512 for (rel = relocs; rel < rel_end; rel++)
2513 {
2514 struct elf_link_hash_entry *h;
2515 unsigned long r_symndx;
9a5aca8c 2516
252b5132
RH		 2517 r_symndx = ELF32_R_SYM (rel->r_info);
2518 if (r_symndx < symtab_hdr->sh_info)
2519 h = NULL;
2520 else
2521 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 2522
252b5132
RH		 2523 /* Some relocs require a global offset table. */
2524 if (dynobj == NULL)
2525 {
2526 switch (ELF32_R_TYPE (rel->r_info))
2527 {
2528 case R_ARM_GOT32:
2529 case R_ARM_GOTOFF:
2530 case R_ARM_GOTPC:
2531 elf_hash_table (info)->dynobj = dynobj = abfd;
2532 if (! _bfd_elf_create_got_section (dynobj, info))
2533 return false;
2534 break;
2535
2536 default:
2537 break;
2538 }
2539 }
2540
2541 switch (ELF32_R_TYPE (rel->r_info))
2542 {
2543 case R_ARM_GOT32:
2544 /* This symbol requires a global offset table entry. */
2545 if (sgot == NULL)
2546 {
2547 sgot = bfd_get_section_by_name (dynobj, ".got");
2548 BFD_ASSERT (sgot != NULL);
2549 }
2550
2551 /* Get the got relocation section if necessary. */
2552 if (srelgot == NULL
2553 && (h != NULL || info->shared))
2554 {
2555 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
9a5aca8c 2556
252b5132
RH		 2557 /* If no got relocation section, make one and initialize. */
2558 if (srelgot == NULL)
2559 {
2560 srelgot = bfd_make_section (dynobj, ".rel.got");
2561 if (srelgot == NULL
2562 || ! bfd_set_section_flags (dynobj, srelgot,
99e4ae17 2563 (SEC_ALLOC
252b5132
RH		 2564 | SEC_LOAD
2565 | SEC_HAS_CONTENTS
2566 | SEC_IN_MEMORY
2567 | SEC_LINKER_CREATED
2568 | SEC_READONLY))
2569 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2570 return false;
2571 }
2572 }
2573
2574 if (h != NULL)
2575 {
2576 if (h->got.offset != (bfd_vma) -1)
2577 /* We have already allocated space in the .got. */
2578 break;
f21f3fe0 2579
252b5132
RH		 2580 h->got.offset = sgot->_raw_size;
2581
2582 /* Make sure this symbol is output as a dynamic symbol. */
2583 if (h->dynindx == -1)
2584 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2585 return false;
2586
2587 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2588 }
2589 else
2590 {
99e4ae17 2591 /* This is a global offset table entry for a local
252b5132
RH		 2592 symbol. */
2593 if (local_got_offsets == NULL)
2594 {
dc810e39 2595 bfd_size_type size;
63b0f745 2596 unsigned int i;
252b5132 2597
dc810e39
AM		 2598 size = symtab_hdr->sh_info;
2599 size *= sizeof (bfd_vma);
252b5132
RH		 2600 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2601 if (local_got_offsets == NULL)
2602 return false;
2603 elf_local_got_offsets (abfd) = local_got_offsets;
2604 for (i = 0; i < symtab_hdr->sh_info; i++)
2605 local_got_offsets[i] = (bfd_vma) -1;
2606 }
f21f3fe0 2607
252b5132
RH		 2608 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2609 /* We have already allocated space in the .got. */
2610 break;
2611
2612 local_got_offsets[r_symndx] = sgot->_raw_size;
2613
2614 if (info->shared)
2615 /* If we are generating a shared object, we need to
2616 output a R_ARM_RELATIVE reloc so that the dynamic
2617 linker can adjust this GOT entry. */
2618 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2619 }
2620
2621 sgot->_raw_size += 4;
2622 break;
2623
99e4ae17 2624 case R_ARM_PLT32:
252b5132
RH		 2625 /* This symbol requires a procedure linkage table entry. We
2626 actually build the entry in adjust_dynamic_symbol,
2627 because this might be a case of linking PIC code which is
2628 never referenced by a dynamic object, in which case we
2629 don't need to generate a procedure linkage table entry
2630 after all. */
2631
2632 /* If this is a local symbol, we resolve it directly without
2633 creating a procedure linkage table entry. */
2634 if (h == NULL)
2635 continue;
2636
2637 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2638 break;
2639
2640 case R_ARM_ABS32:
2641 case R_ARM_REL32:
2642 case R_ARM_PC24:
2643 /* If we are creating a shared library, and this is a reloc
2644 against a global symbol, or a non PC relative reloc
2645 against a local symbol, then we need to copy the reloc
2646 into the shared library. However, if we are linking with
2647 -Bsymbolic, we do not need to copy a reloc against a
2648 global symbol which is defined in an object we are
2649 including in the link (i.e., DEF_REGULAR is set). At
2650 this point we have not seen all the input files, so it is
2651 possible that DEF_REGULAR is not set now but will be set
2652 later (it is never cleared). We account for that
2653 possibility below by storing information in the
2654 pcrel_relocs_copied field of the hash table entry. */
2655 if (info->shared
2656 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2657 || (h != NULL
2658 && (! info->symbolic
2659 || (h->elf_link_hash_flags
2660 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2661 {
2662 /* When creating a shared object, we must copy these
2663 reloc types into the output file. We create a reloc
2664 section in dynobj and make room for this reloc. */
2665 if (sreloc == NULL)
2666 {
2667 const char * name;
2668
2669 name = (bfd_elf_string_from_elf_section
2670 (abfd,
2671 elf_elfheader (abfd)->e_shstrndx,
2672 elf_section_data (sec)->rel_hdr.sh_name));
2673 if (name == NULL)
2674 return false;
2675
2676 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 2677 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH		 2678 name + 4) == 0);
2679
2680 sreloc = bfd_get_section_by_name (dynobj, name);
2681 if (sreloc == NULL)
2682 {
2683 flagword flags;
2684
2685 sreloc = bfd_make_section (dynobj, name);
2686 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2687 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2688 if ((sec->flags & SEC_ALLOC) != 0)
2689 flags |= SEC_ALLOC | SEC_LOAD;
2690 if (sreloc == NULL
2691 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2692 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2693 return false;
2694 }
99e4ae17
AJ		 2695 if (sec->flags & SEC_READONLY)
2696 info->flags |= DF_TEXTREL;
252b5132
RH		 2697 }
2698
2699 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2700 /* If we are linking with -Bsymbolic, and this is a
2701 global symbol, we count the number of PC relative
2702 relocations we have entered for this symbol, so that
2703 we can discard them again if the symbol is later
2704 defined by a regular object. Note that this function
2705 is only called if we are using an elf_i386 linker
2706 hash table, which means that h is really a pointer to
2707 an elf_i386_link_hash_entry. */
2708 if (h != NULL && info->symbolic
2709 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2710 {
2711 struct elf32_arm_link_hash_entry * eh;
2712 struct elf32_arm_pcrel_relocs_copied * p;
2713
2714 eh = (struct elf32_arm_link_hash_entry *) h;
2715
2716 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2717 if (p->section == sreloc)
2718 break;
2719
2720 if (p == NULL)
2721 {
2722 p = ((struct elf32_arm_pcrel_relocs_copied *)
dc810e39 2723 bfd_alloc (dynobj, (bfd_size_type) sizeof * p));
252b5132
RH		 2724 if (p == NULL)
2725 return false;
2726 p->next = eh->pcrel_relocs_copied;
2727 eh->pcrel_relocs_copied = p;
2728 p->section = sreloc;
2729 p->count = 0;
2730 }
2731
2732 ++p->count;
2733 }
2734 }
2735 break;
2736
2737 /* This relocation describes the C++ object vtable hierarchy.
2738 Reconstruct it for later use during GC. */
2739 case R_ARM_GNU_VTINHERIT:
2740 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2741 return false;
2742 break;
9a5aca8c 2743
252b5132
RH		 2744 /* This relocation describes which C++ vtable entries are actually
2745 used. Record for later use during GC. */
2746 case R_ARM_GNU_VTENTRY:
d512aa07 2747 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
252b5132
RH		 2748 return false;
2749 break;
2750 }
2751 }
f21f3fe0 2752
252b5132
RH		 2753 return true;
2754}
2755
252b5132
RH		 2756/* Find the nearest line to a particular section and offset, for error
2757 reporting. This code is a duplicate of the code in elf.c, except
9b485d32 2758 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
252b5132
RH		 2759
2760static boolean
2761elf32_arm_find_nearest_line
2762 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2763 bfd * abfd;
2764 asection * section;
2765 asymbol ** symbols;
2766 bfd_vma offset;
917583ad
NC		 2767 const char ** filename_ptr;
2768 const char ** functionname_ptr;
252b5132
RH		 2769 unsigned int * line_ptr;
2770{
2771 boolean found;
2772 const char * filename;
2773 asymbol * func;
2774 bfd_vma low_func;
2775 asymbol ** p;
2776
2777 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 2778 filename_ptr, functionname_ptr,
857ec808
NC		 2779 line_ptr, 0,
2780 &elf_tdata (abfd)->dwarf2_find_line_info))
252b5132
RH		 2781 return true;
2782
2783 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2784 &found, filename_ptr,
2785 functionname_ptr, line_ptr,
2786 &elf_tdata (abfd)->line_info))
2787 return false;
f21f3fe0 2788
252b5132
RH		 2789 if (found)
2790 return true;
2791
2792 if (symbols == NULL)
2793 return false;
2794
2795 filename = NULL;
2796 func = NULL;
2797 low_func = 0;
2798
2799 for (p = symbols; *p != NULL; p++)
2800 {
2801 elf_symbol_type *q;
2802
2803 q = (elf_symbol_type *) *p;
2804
2805 if (bfd_get_section (&q->symbol) != section)
2806 continue;
2807
2808 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2809 {
2810 default:
2811 break;
2812 case STT_FILE:
2813 filename = bfd_asymbol_name (&q->symbol);
2814 break;
2815 case STT_NOTYPE:
2816 case STT_FUNC:
2817 case STT_ARM_TFUNC:
2818 if (q->symbol.section == section
2819 && q->symbol.value >= low_func
2820 && q->symbol.value <= offset)
2821 {
2822 func = (asymbol *) q;
2823 low_func = q->symbol.value;
2824 }
2825 break;
2826 }
2827 }
2828
2829 if (func == NULL)
2830 return false;
2831
2832 *filename_ptr = filename;
2833 *functionname_ptr = bfd_asymbol_name (func);
2834 *line_ptr = 0;
f21f3fe0 2835
252b5132
RH		 2836 return true;
2837}
2838
2839/* Adjust a symbol defined by a dynamic object and referenced by a
2840 regular object. The current definition is in some section of the
2841 dynamic object, but we're not including those sections. We have to
2842 change the definition to something the rest of the link can
2843 understand. */
2844
2845static boolean
2846elf32_arm_adjust_dynamic_symbol (info, h)
2847 struct bfd_link_info * info;
2848 struct elf_link_hash_entry * h;
2849{
2850 bfd * dynobj;
2851 asection * s;
2852 unsigned int power_of_two;
2853
2854 dynobj = elf_hash_table (info)->dynobj;
2855
2856 /* Make sure we know what is going on here. */
2857 BFD_ASSERT (dynobj != NULL
2858 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2859 || h->weakdef != NULL
2860 || ((h->elf_link_hash_flags
2861 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2862 && (h->elf_link_hash_flags
2863 & ELF_LINK_HASH_REF_REGULAR) != 0
2864 && (h->elf_link_hash_flags
2865 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2866
2867 /* If this is a function, put it in the procedure linkage table. We
2868 will fill in the contents of the procedure linkage table later,
2869 when we know the address of the .got section. */
2870 if (h->type == STT_FUNC
2871 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2872 {
2873 if (! info->shared
2874 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2875 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2876 {
2877 /* This case can occur if we saw a PLT32 reloc in an input
2878 file, but the symbol was never referred to by a dynamic
2879 object. In such a case, we don't actually need to build
2880 a procedure linkage table, and we can just do a PC32
2881 reloc instead. */
2882 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2883 return true;
2884 }
2885
2886 /* Make sure this symbol is output as a dynamic symbol. */
2887 if (h->dynindx == -1)
2888 {
2889 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2890 return false;
2891 }
2892
2893 s = bfd_get_section_by_name (dynobj, ".plt");
2894 BFD_ASSERT (s != NULL);
2895
2896 /* If this is the first .plt entry, make room for the special
2897 first entry. */
2898 if (s->_raw_size == 0)
2899 s->_raw_size += PLT_ENTRY_SIZE;
2900
2901 /* If this symbol is not defined in a regular file, and we are
2902 not generating a shared library, then set the symbol to this
2903 location in the .plt. This is required to make function
2904 pointers compare as equal between the normal executable and
2905 the shared library. */
2906 if (! info->shared
2907 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2908 {
2909 h->root.u.def.section = s;
2910 h->root.u.def.value = s->_raw_size;
2911 }
2912
2913 h->plt.offset = s->_raw_size;
2914
2915 /* Make room for this entry. */
2916 s->_raw_size += PLT_ENTRY_SIZE;
2917
2918 /* We also need to make an entry in the .got.plt section, which
2919 will be placed in the .got section by the linker script. */
252b5132
RH		 2920 s = bfd_get_section_by_name (dynobj, ".got.plt");
2921 BFD_ASSERT (s != NULL);
2922 s->_raw_size += 4;
2923
2924 /* We also need to make an entry in the .rel.plt section. */
2925
2926 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2927 BFD_ASSERT (s != NULL);
2928 s->_raw_size += sizeof (Elf32_External_Rel);
2929
2930 return true;
2931 }
2932
2933 /* If this is a weak symbol, and there is a real definition, the
2934 processor independent code will have arranged for us to see the
2935 real definition first, and we can just use the same value. */
2936 if (h->weakdef != NULL)
2937 {
2938 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2939 || h->weakdef->root.type == bfd_link_hash_defweak);
2940 h->root.u.def.section = h->weakdef->root.u.def.section;
2941 h->root.u.def.value = h->weakdef->root.u.def.value;
2942 return true;
2943 }
2944
2945 /* This is a reference to a symbol defined by a dynamic object which
2946 is not a function. */
2947
2948 /* If we are creating a shared library, we must presume that the
2949 only references to the symbol are via the global offset table.
2950 For such cases we need not do anything here; the relocations will
2951 be handled correctly by relocate_section. */
2952 if (info->shared)
2953 return true;
2954
2955 /* We must allocate the symbol in our .dynbss section, which will
2956 become part of the .bss section of the executable. There will be
2957 an entry for this symbol in the .dynsym section. The dynamic
2958 object will contain position independent code, so all references
2959 from the dynamic object to this symbol will go through the global
2960 offset table. The dynamic linker will use the .dynsym entry to
2961 determine the address it must put in the global offset table, so
2962 both the dynamic object and the regular object will refer to the
2963 same memory location for the variable. */
252b5132
RH		 2964 s = bfd_get_section_by_name (dynobj, ".dynbss");
2965 BFD_ASSERT (s != NULL);
2966
2967 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2968 copy the initial value out of the dynamic object and into the
2969 runtime process image. We need to remember the offset into the
2970 .rel.bss section we are going to use. */
2971 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2972 {
2973 asection *srel;
2974
2975 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
2976 BFD_ASSERT (srel != NULL);
2977 srel->_raw_size += sizeof (Elf32_External_Rel);
2978 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2979 }
2980
2981 /* We need to figure out the alignment required for this symbol. I
2982 have no idea how ELF linkers handle this. */
2983 power_of_two = bfd_log2 (h->size);
2984 if (power_of_two > 3)
2985 power_of_two = 3;
2986
2987 /* Apply the required alignment. */
2988 s->_raw_size = BFD_ALIGN (s->_raw_size,
2989 (bfd_size_type) (1 << power_of_two));
2990 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2991 {
2992 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2993 return false;
2994 }
2995
2996 /* Define the symbol as being at this point in the section. */
2997 h->root.u.def.section = s;
2998 h->root.u.def.value = s->_raw_size;
2999
3000 /* Increment the section size to make room for the symbol. */
3001 s->_raw_size += h->size;
3002
3003 return true;
3004}
3005
3006/* Set the sizes of the dynamic sections. */
3007
3008static boolean
3009elf32_arm_size_dynamic_sections (output_bfd, info)
99e4ae17 3010 bfd * output_bfd ATTRIBUTE_UNUSED;
252b5132
RH		 3011 struct bfd_link_info * info;
3012{
3013 bfd * dynobj;
3014 asection * s;
3015 boolean plt;
3016 boolean relocs;
252b5132
RH		 3017
3018 dynobj = elf_hash_table (info)->dynobj;
3019 BFD_ASSERT (dynobj != NULL);
3020
3021 if (elf_hash_table (info)->dynamic_sections_created)
3022 {
3023 /* Set the contents of the .interp section to the interpreter. */
3024 if (! info->shared)
3025 {
3026 s = bfd_get_section_by_name (dynobj, ".interp");
3027 BFD_ASSERT (s != NULL);
3028 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3029 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3030 }
3031 }
3032 else
3033 {
3034 /* We may have created entries in the .rel.got section.
3035 However, if we are not creating the dynamic sections, we will
3036 not actually use these entries. Reset the size of .rel.got,
3037 which will cause it to get stripped from the output file
3038 below. */
3039 s = bfd_get_section_by_name (dynobj, ".rel.got");
3040 if (s != NULL)
3041 s->_raw_size = 0;
3042 }
3043
3044 /* If this is a -Bsymbolic shared link, then we need to discard all
3045 PC relative relocs against symbols defined in a regular object.
3046 We allocated space for them in the check_relocs routine, but we
3047 will not fill them in in the relocate_section routine. */
3048 if (info->shared && info->symbolic)
3049 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
3050 elf32_arm_discard_copies,
3051 (PTR) NULL);
3052
3053 /* The check_relocs and adjust_dynamic_symbol entry points have
3054 determined the sizes of the various dynamic sections. Allocate
3055 memory for them. */
3056 plt = false;
3057 relocs = false;
252b5132
RH		 3058 for (s = dynobj->sections; s != NULL; s = s->next)
3059 {
3060 const char * name;
3061 boolean strip;
3062
3063 if ((s->flags & SEC_LINKER_CREATED) == 0)
3064 continue;
3065
3066 /* It's OK to base decisions on the section name, because none
3067 of the dynobj section names depend upon the input files. */
3068 name = bfd_get_section_name (dynobj, s);
3069
3070 strip = false;
3071
3072 if (strcmp (name, ".plt") == 0)
3073 {
3074 if (s->_raw_size == 0)
3075 {
3076 /* Strip this section if we don't need it; see the
3077 comment below. */
3078 strip = true;
3079 }
3080 else
3081 {
3082 /* Remember whether there is a PLT. */
3083 plt = true;
3084 }
3085 }
3086 else if (strncmp (name, ".rel", 4) == 0)
3087 {
3088 if (s->_raw_size == 0)
3089 {
3090 /* If we don't need this section, strip it from the
3091 output file. This is mostly to handle .rel.bss and
3092 .rel.plt. We must create both sections in
3093 create_dynamic_sections, because they must be created
3094 before the linker maps input sections to output
3095 sections. The linker does that before
3096 adjust_dynamic_symbol is called, and it is that
3097 function which decides whether anything needs to go
3098 into these sections. */
3099 strip = true;
3100 }
3101 else
3102 {
252b5132
RH		 3103 /* Remember whether there are any reloc sections other
3104 than .rel.plt. */
3105 if (strcmp (name, ".rel.plt") != 0)
99e4ae17 3106 relocs = true;
252b5132
RH		 3107
3108 /* We use the reloc_count field as a counter if we need
3109 to copy relocs into the output file. */
3110 s->reloc_count = 0;
3111 }
3112 }
3113 else if (strncmp (name, ".got", 4) != 0)
3114 {
3115 /* It's not one of our sections, so don't allocate space. */
3116 continue;
3117 }
3118
3119 if (strip)
3120 {
3121 asection ** spp;
3122
3123 for (spp = &s->output_section->owner->sections;
3124 *spp != s->output_section;
3125 spp = &(*spp)->next)
3126 ;
3127 *spp = s->output_section->next;
3128 --s->output_section->owner->section_count;
3129
3130 continue;
3131 }
3132
3133 /* Allocate memory for the section contents. */
3134 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3135 if (s->contents == NULL && s->_raw_size != 0)
3136 return false;
3137 }
3138
3139 if (elf_hash_table (info)->dynamic_sections_created)
3140 {
3141 /* Add some entries to the .dynamic section. We fill in the
3142 values later, in elf32_arm_finish_dynamic_sections, but we
3143 must add the entries now so that we get the correct size for
3144 the .dynamic section. The DT_DEBUG entry is filled in by the
3145 dynamic linker and used by the debugger. */
dc810e39
AM		 3146#define add_dynamic_entry(TAG, VAL) \
3147 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3148
3149 if (!info->shared)
252b5132 3150 {
dc810e39 3151 if (!add_dynamic_entry (DT_DEBUG, 0))
252b5132
RH		 3152 return false;
3153 }
3154
3155 if (plt)
3156 {
dc810e39
AM		 3157 if ( !add_dynamic_entry (DT_PLTGOT, 0)
3158 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3159 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3160 || !add_dynamic_entry (DT_JMPREL, 0))
252b5132
RH		 3161 return false;
3162 }
3163
3164 if (relocs)
3165 {
dc810e39
AM		 3166 if ( !add_dynamic_entry (DT_REL, 0)
3167 || !add_dynamic_entry (DT_RELSZ, 0)
3168 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
252b5132
RH		 3169 return false;
3170 }
3171
99e4ae17 3172 if ((info->flags & DF_TEXTREL) != 0)
252b5132 3173 {
dc810e39 3174 if (!add_dynamic_entry (DT_TEXTREL, 0))
252b5132 3175 return false;
d6cf2879 3176 info->flags |= DF_TEXTREL;
252b5132
RH		 3177 }
3178 }
dc810e39 3179#undef add_synamic_entry
252b5132
RH		 3180
3181 return true;
3182}
3183
3184/* This function is called via elf32_arm_link_hash_traverse if we are
3185 creating a shared object with -Bsymbolic. It discards the space
3186 allocated to copy PC relative relocs against symbols which are
3187 defined in regular objects. We allocated space for them in the
3188 check_relocs routine, but we won't fill them in in the
3189 relocate_section routine. */
3190
3191static boolean
3192elf32_arm_discard_copies (h, ignore)
3193 struct elf32_arm_link_hash_entry * h;
5f771d47 3194 PTR ignore ATTRIBUTE_UNUSED;
252b5132
RH		 3195{
3196 struct elf32_arm_pcrel_relocs_copied * s;
3197
3198 /* We only discard relocs for symbols defined in a regular object. */
3199 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3200 return true;
3201
3202 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3203 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
3204
3205 return true;
3206}
3207
3208/* Finish up dynamic symbol handling. We set the contents of various
3209 dynamic sections here. */
3210
3211static boolean
3212elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3213 bfd * output_bfd;
3214 struct bfd_link_info * info;
3215 struct elf_link_hash_entry * h;
3216 Elf_Internal_Sym * sym;
3217{
3218 bfd * dynobj;
3219
3220 dynobj = elf_hash_table (info)->dynobj;
3221
3222 if (h->plt.offset != (bfd_vma) -1)
3223 {
3224 asection * splt;
3225 asection * sgot;
3226 asection * srel;
3227 bfd_vma plt_index;
3228 bfd_vma got_offset;
3229 Elf_Internal_Rel rel;
3230
3231 /* This symbol has an entry in the procedure linkage table. Set
3232 it up. */
3233
3234 BFD_ASSERT (h->dynindx != -1);
3235
3236 splt = bfd_get_section_by_name (dynobj, ".plt");
3237 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3238 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
3239 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
3240
3241 /* Get the index in the procedure linkage table which
3242 corresponds to this symbol. This is the index of this symbol
3243 in all the symbols for which we are making plt entries. The
3244 first entry in the procedure linkage table is reserved. */
3245 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3246
3247 /* Get the offset into the .got table of the entry that
3248 corresponds to this function. Each .got entry is 4 bytes.
3249 The first three are reserved. */
3250 got_offset = (plt_index + 3) * 4;
3251
3252 /* Fill in the entry in the procedure linkage table. */
f7a74f8c
NC		 3253 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0],
3254 splt->contents + h->plt.offset + 0);
3255 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1],
3256 splt->contents + h->plt.offset + 4);
3257 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2],
3258 splt->contents + h->plt.offset + 8);
252b5132
RH		 3259 bfd_put_32 (output_bfd,
3260 (sgot->output_section->vma
3261 + sgot->output_offset
f21f3fe0 3262 + got_offset
252b5132
RH		 3263 - splt->output_section->vma
3264 - splt->output_offset
3265 - h->plt.offset - 12),
3266 splt->contents + h->plt.offset + 12);
3267
3268 /* Fill in the entry in the global offset table. */
3269 bfd_put_32 (output_bfd,
3270 (splt->output_section->vma
3271 + splt->output_offset),
3272 sgot->contents + got_offset);
3273
3274 /* Fill in the entry in the .rel.plt section. */
3275 rel.r_offset = (sgot->output_section->vma
3276 + sgot->output_offset
3277 + got_offset);
3278 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
3279 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3280 ((Elf32_External_Rel *) srel->contents
3281 + plt_index));
3282
3283 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3284 {
3285 /* Mark the symbol as undefined, rather than as defined in
3286 the .plt section. Leave the value alone. */
3287 sym->st_shndx = SHN_UNDEF;
d982ba73
PB		 3288 /* If the symbol is weak, we do need to clear the value.
3289 Otherwise, the PLT entry would provide a definition for
3290 the symbol even if the symbol wasn't defined anywhere,
3291 and so the symbol would never be NULL. */
3292 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3293 == 0)
3294 sym->st_value = 0;
252b5132
RH		 3295 }
3296 }
3297
3298 if (h->got.offset != (bfd_vma) -1)
3299 {
3300 asection * sgot;
3301 asection * srel;
3302 Elf_Internal_Rel rel;
3303
3304 /* This symbol has an entry in the global offset table. Set it
3305 up. */
252b5132
RH		 3306 sgot = bfd_get_section_by_name (dynobj, ".got");
3307 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3308 BFD_ASSERT (sgot != NULL && srel != NULL);
3309
3310 rel.r_offset = (sgot->output_section->vma
3311 + sgot->output_offset
dc810e39 3312 + (h->got.offset &~ (bfd_vma) 1));
252b5132
RH		 3313
3314 /* If this is a -Bsymbolic link, and the symbol is defined
3315 locally, we just want to emit a RELATIVE reloc. The entry in
3316 the global offset table will already have been initialized in
3317 the relocate_section function. */
3318 if (info->shared
3319 && (info->symbolic || h->dynindx == -1)
3320 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3321 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3322 else
3323 {
3324 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3325 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3326 }
3327
3328 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3329 ((Elf32_External_Rel *) srel->contents
3330 + srel->reloc_count));
3331 ++srel->reloc_count;
3332 }
3333
3334 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3335 {
3336 asection * s;
3337 Elf_Internal_Rel rel;
3338
3339 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH		 3340 BFD_ASSERT (h->dynindx != -1
3341 && (h->root.type == bfd_link_hash_defined
3342 || h->root.type == bfd_link_hash_defweak));
3343
3344 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3345 ".rel.bss");
3346 BFD_ASSERT (s != NULL);
3347
3348 rel.r_offset = (h->root.u.def.value
3349 + h->root.u.def.section->output_section->vma
3350 + h->root.u.def.section->output_offset);
3351 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3352 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3353 ((Elf32_External_Rel *) s->contents
3354 + s->reloc_count));
3355 ++s->reloc_count;
3356 }
3357
3358 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3359 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3360 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3361 sym->st_shndx = SHN_ABS;
3362
3363 return true;
3364}
3365
3366/* Finish up the dynamic sections. */
3367
3368static boolean
3369elf32_arm_finish_dynamic_sections (output_bfd, info)
3370 bfd * output_bfd;
3371 struct bfd_link_info * info;
3372{
3373 bfd * dynobj;
3374 asection * sgot;
3375 asection * sdyn;
3376
3377 dynobj = elf_hash_table (info)->dynobj;
3378
3379 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3380 BFD_ASSERT (sgot != NULL);
3381 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3382
3383 if (elf_hash_table (info)->dynamic_sections_created)
3384 {
3385 asection *splt;
3386 Elf32_External_Dyn *dyncon, *dynconend;
3387
3388 splt = bfd_get_section_by_name (dynobj, ".plt");
3389 BFD_ASSERT (splt != NULL && sdyn != NULL);
3390
3391 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3392 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
9b485d32 3393
252b5132
RH		 3394 for (; dyncon < dynconend; dyncon++)
3395 {
3396 Elf_Internal_Dyn dyn;
3397 const char * name;
3398 asection * s;
3399
3400 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3401
3402 switch (dyn.d_tag)
3403 {
3404 default:
3405 break;
3406
3407 case DT_PLTGOT:
3408 name = ".got";
3409 goto get_vma;
3410 case DT_JMPREL:
3411 name = ".rel.plt";
3412 get_vma:
3413 s = bfd_get_section_by_name (output_bfd, name);
3414 BFD_ASSERT (s != NULL);
3415 dyn.d_un.d_ptr = s->vma;
3416 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3417 break;
3418
3419 case DT_PLTRELSZ:
3420 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3421 BFD_ASSERT (s != NULL);
3422 if (s->_cooked_size != 0)
3423 dyn.d_un.d_val = s->_cooked_size;
3424 else
3425 dyn.d_un.d_val = s->_raw_size;
3426 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3427 break;
3428
3429 case DT_RELSZ:
3430 /* My reading of the SVR4 ABI indicates that the
3431 procedure linkage table relocs (DT_JMPREL) should be
3432 included in the overall relocs (DT_REL). This is
3433 what Solaris does. However, UnixWare can not handle
3434 that case. Therefore, we override the DT_RELSZ entry
3435 here to make it not include the JMPREL relocs. Since
3436 the linker script arranges for .rel.plt to follow all
3437 other relocation sections, we don't have to worry
3438 about changing the DT_REL entry. */
3439 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3440 if (s != NULL)
3441 {
3442 if (s->_cooked_size != 0)
3443 dyn.d_un.d_val -= s->_cooked_size;
3444 else
3445 dyn.d_un.d_val -= s->_raw_size;
3446 }
3447 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3448 break;
3449 }
3450 }
3451
3452 /* Fill in the first entry in the procedure linkage table. */
3453 if (splt->_raw_size > 0)
f7a74f8c
NC		 3454 {
3455 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
3456 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
3457 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
3458 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
3459 }
252b5132
RH		 3460
3461 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3462 really seem like the right value. */
3463 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3464 }
3465
3466 /* Fill in the first three entries in the global offset table. */
3467 if (sgot->_raw_size > 0)
3468 {
3469 if (sdyn == NULL)
3470 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3471 else
3472 bfd_put_32 (output_bfd,
3473 sdyn->output_section->vma + sdyn->output_offset,
3474 sgot->contents);
3475 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3476 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3477 }
3478
3479 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3480
3481 return true;
3482}
3483
ba96a88f
NC		 3484static void
3485elf32_arm_post_process_headers (abfd, link_info)
3486 bfd * abfd;
5f771d47 3487 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f 3488{
9b485d32 3489 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
ba96a88f
NC		 3490
3491 i_ehdrp = elf_elfheader (abfd);
3492
3493 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3494 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3495}
3496
99e4ae17 3497static enum elf_reloc_type_class
f51e552e
AM		 3498elf32_arm_reloc_type_class (rela)
3499 const Elf_Internal_Rela *rela;
99e4ae17 3500{
f51e552e 3501 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ		 3502 {
3503 case R_ARM_RELATIVE:
3504 return reloc_class_relative;
3505 case R_ARM_JUMP_SLOT:
3506 return reloc_class_plt;
3507 case R_ARM_COPY:
3508 return reloc_class_copy;
3509 default:
3510 return reloc_class_normal;
3511 }
3512}
3513
3514
252b5132
RH		 3515#define ELF_ARCH bfd_arch_arm
3516#define ELF_MACHINE_CODE EM_ARM
f21f3fe0 3517#define ELF_MAXPAGESIZE 0x8000
252b5132 3518
99e4ae17
AJ		 3519#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3520#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH		 3521#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3522#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3523#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 3524#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132
RH		 3525#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3526
3527#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3528#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3529#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3530#define elf_backend_check_relocs elf32_arm_check_relocs
dc810e39 3531#define elf_backend_relocate_section elf32_arm_relocate_section
252b5132
RH		 3532#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3533#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3534#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3535#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3536#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 3537#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 3538#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
252b5132
RH		 3539
3540#define elf_backend_can_gc_sections 1
3541#define elf_backend_plt_readonly 1
3542#define elf_backend_want_got_plt 1
3543#define elf_backend_want_plt_sym 0
3544
04f7c78d
NC		 3545#define elf_backend_got_header_size 12
3546#define elf_backend_plt_header_size PLT_ENTRY_SIZE
3547
252b5132 3548#include "elf32-target.h"
GDB Binutils - Deliverables
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