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[deliverable/binutils-gdb.git] / bfd / elf32-arm.h
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252b5132 1/* 32-bit ELF support for ARM
5eefb65f 2 Copyright 1998, 1999, 2000, 2001, 2002 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
51c5503b
NC		 1502 case R_ARM_THM_PC11:
1503 /* Thumb B (branch) instruction). */
1504 {
1505 bfd_vma relocation;
1506 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1507 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1508 bfd_vma check;
1509 bfd_signed_vma signed_check;
1510
1511#ifdef USE_REL
1512 /* Need to refetch addend. */
1513 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1514 /* ??? Need to determine shift amount from operand size. */
1515 addend >>= howto->rightshift;
1516#endif
1517 relocation = value + addend;
1518
1519 relocation -= (input_section->output_section->vma
1520 + input_section->output_offset
1521 + rel->r_offset);
1522
1523 check = relocation >> howto->rightshift;
1524
1525 /* If this is a signed value, the rightshift just
1526 dropped leading 1 bits (assuming twos complement). */
1527 if ((bfd_signed_vma) relocation >= 0)
1528 signed_check = check;
1529 else
1530 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1531
1532 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
1533
1534 bfd_put_16 (input_bfd, relocation, hit_data);
1535
1536 /* Assumes two's complement. */
1537 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1538 return bfd_reloc_overflow;
1539
1540 return bfd_reloc_ok;
1541 }
1542
252b5132
RH		 1543 case R_ARM_GNU_VTINHERIT:
1544 case R_ARM_GNU_VTENTRY:
1545 return bfd_reloc_ok;
1546
1547 case R_ARM_COPY:
1548 return bfd_reloc_notsupported;
1549
1550 case R_ARM_GLOB_DAT:
1551 return bfd_reloc_notsupported;
1552
1553 case R_ARM_JUMP_SLOT:
1554 return bfd_reloc_notsupported;
1555
1556 case R_ARM_RELATIVE:
1557 return bfd_reloc_notsupported;
1558
1559 case R_ARM_GOTOFF:
1560 /* Relocation is relative to the start of the
1561 global offset table. */
1562
1563 BFD_ASSERT (sgot != NULL);
1564 if (sgot == NULL)
1565 return bfd_reloc_notsupported;
9a5aca8c 1566
252b5132
RH		 1567 /* Note that sgot->output_offset is not involved in this
1568 calculation. We always want the start of .got. If we
1569 define _GLOBAL_OFFSET_TABLE in a different way, as is
1570 permitted by the ABI, we might have to change this
9b485d32 1571 calculation. */
252b5132 1572 value -= sgot->output_section->vma;
f21f3fe0 1573 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1574 contents, rel->r_offset, value,
1575 (bfd_vma) 0);
252b5132
RH		 1576
1577 case R_ARM_GOTPC:
a7c10850 1578 /* Use global offset table as symbol value. */
252b5132 1579 BFD_ASSERT (sgot != NULL);
f21f3fe0 1580
252b5132
RH		 1581 if (sgot == NULL)
1582 return bfd_reloc_notsupported;
1583
1584 value = sgot->output_section->vma;
f21f3fe0 1585 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1586 contents, rel->r_offset, value,
1587 (bfd_vma) 0);
f21f3fe0 1588
252b5132
RH		 1589 case R_ARM_GOT32:
1590 /* Relocation is to the entry for this symbol in the
9b485d32 1591 global offset table. */
252b5132
RH		 1592 if (sgot == NULL)
1593 return bfd_reloc_notsupported;
f21f3fe0 1594
252b5132
RH		 1595 if (h != NULL)
1596 {
1597 bfd_vma off;
f21f3fe0 1598
252b5132
RH		 1599 off = h->got.offset;
1600 BFD_ASSERT (off != (bfd_vma) -1);
f21f3fe0 1601
252b5132
RH		 1602 if (!elf_hash_table (info)->dynamic_sections_created ||
1603 (info->shared && (info->symbolic || h->dynindx == -1)
1604 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1605 {
1606 /* This is actually a static link, or it is a -Bsymbolic link
1607 and the symbol is defined locally. We must initialize this
1608 entry in the global offset table. Since the offset must
1609 always be a multiple of 4, we use the least significant bit
1610 to record whether we have initialized it already.
f21f3fe0 1611
252b5132 1612 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1613 entry to initialize the value. This is done in the
9b485d32 1614 finish_dynamic_symbol routine. */
252b5132
RH		 1615 if ((off & 1) != 0)
1616 off &= ~1;
1617 else
1618 {
1619 bfd_put_32 (output_bfd, value, sgot->contents + off);
1620 h->got.offset |= 1;
1621 }
1622 }
f21f3fe0 1623
252b5132
RH		 1624 value = sgot->output_offset + off;
1625 }
1626 else
1627 {
1628 bfd_vma off;
f21f3fe0 1629
252b5132
RH		 1630 BFD_ASSERT (local_got_offsets != NULL &&
1631 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1632
252b5132 1633 off = local_got_offsets[r_symndx];
f21f3fe0 1634
252b5132
RH		 1635 /* The offset must always be a multiple of 4. We use the
1636 least significant bit to record whether we have already
9b485d32 1637 generated the necessary reloc. */
252b5132
RH		 1638 if ((off & 1) != 0)
1639 off &= ~1;
1640 else
1641 {
1642 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1643
252b5132
RH		 1644 if (info->shared)
1645 {
1646 asection * srelgot;
1647 Elf_Internal_Rel outrel;
f21f3fe0 1648
252b5132
RH		 1649 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1650 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1651
252b5132 1652 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1653 + sgot->output_offset
252b5132
RH		 1654 + off);
1655 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1656 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1657 (((Elf32_External_Rel *)
1658 srelgot->contents)
1659 + srelgot->reloc_count));
1660 ++srelgot->reloc_count;
1661 }
f21f3fe0 1662
252b5132
RH		 1663 local_got_offsets[r_symndx] |= 1;
1664 }
f21f3fe0 1665
252b5132
RH		 1666 value = sgot->output_offset + off;
1667 }
9a5aca8c 1668
f21f3fe0 1669 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1670 contents, rel->r_offset, value,
1671 (bfd_vma) 0);
f21f3fe0 1672
252b5132
RH		 1673 case R_ARM_PLT32:
1674 /* Relocation is to the entry for this symbol in the
1675 procedure linkage table. */
1676
1677 /* Resolve a PLT32 reloc against a local symbol directly,
9b485d32 1678 without using the procedure linkage table. */
252b5132
RH		 1679 if (h == NULL)
1680 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1681 contents, rel->r_offset, value,
1682 (bfd_vma) 0);
252b5132
RH		 1683
1684 if (h->plt.offset == (bfd_vma) -1)
1685 /* We didn't make a PLT entry for this symbol. This
1686 happens when statically linking PIC code, or when
1687 using -Bsymbolic. */
1688 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1689 contents, rel->r_offset, value,
1690 (bfd_vma) 0);
1691
1692 BFD_ASSERT(splt != NULL);
1693 if (splt == NULL)
1694 return bfd_reloc_notsupported;
1695
1696 value = (splt->output_section->vma
1697 + splt->output_offset
1698 + h->plt.offset);
1699 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1700 contents, rel->r_offset, value,
1701 (bfd_vma) 0);
f21f3fe0 1702
252b5132
RH		 1703 case R_ARM_SBREL32:
1704 return bfd_reloc_notsupported;
1705
1706 case R_ARM_AMP_VCALL9:
1707 return bfd_reloc_notsupported;
1708
1709 case R_ARM_RSBREL32:
1710 return bfd_reloc_notsupported;
1711
1712 case R_ARM_THM_RPC22:
1713 return bfd_reloc_notsupported;
1714
1715 case R_ARM_RREL32:
1716 return bfd_reloc_notsupported;
1717
1718 case R_ARM_RABS32:
1719 return bfd_reloc_notsupported;
1720
1721 case R_ARM_RPC24:
1722 return bfd_reloc_notsupported;
1723
1724 case R_ARM_RBASE:
1725 return bfd_reloc_notsupported;
1726
1727 default:
1728 return bfd_reloc_notsupported;
1729 }
1730}
1731
98c1d4aa
NC		 1732#ifdef USE_REL
1733/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1734static void
1735arm_add_to_rel (abfd, address, howto, increment)
1736 bfd * abfd;
59f2c4e7 1737 bfd_byte * address;
98c1d4aa
NC		 1738 reloc_howto_type * howto;
1739 bfd_signed_vma increment;
1740{
98c1d4aa
NC		 1741 bfd_signed_vma addend;
1742
9a5aca8c 1743 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 1744 {
9a5aca8c
AM		 1745 int upper_insn, lower_insn;
1746 int upper, lower;
98c1d4aa 1747
9a5aca8c
AM		 1748 upper_insn = bfd_get_16 (abfd, address);
1749 lower_insn = bfd_get_16 (abfd, address + 2);
1750 upper = upper_insn & 0x7ff;
1751 lower = lower_insn & 0x7ff;
1752
1753 addend = (upper << 12) | (lower << 1);
ddda4409 1754 addend += increment;
9a5aca8c 1755 addend >>= 1;
98c1d4aa 1756
9a5aca8c
AM		 1757 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1758 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1759
dc810e39
AM		 1760 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
1761 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM		 1762 }
1763 else
1764 {
1765 bfd_vma contents;
1766
1767 contents = bfd_get_32 (abfd, address);
1768
1769 /* Get the (signed) value from the instruction. */
1770 addend = contents & howto->src_mask;
1771 if (addend & ((howto->src_mask + 1) >> 1))
1772 {
1773 bfd_signed_vma mask;
1774
1775 mask = -1;
1776 mask &= ~ howto->src_mask;
1777 addend |= mask;
1778 }
1779
1780 /* Add in the increment, (which is a byte value). */
1781 switch (howto->type)
1782 {
1783 default:
1784 addend += increment;
1785 break;
1786
1787 case R_ARM_PC24:
1788 addend <<= howto->size;
dc810e39 1789 addend += increment;
9a5aca8c
AM		 1790
1791 /* Should we check for overflow here ? */
1792
1793 /* Drop any undesired bits. */
1794 addend >>= howto->rightshift;
1795 break;
1796 }
1797
1798 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1799
1800 bfd_put_32 (abfd, contents, address);
ddda4409 1801 }
98c1d4aa
NC		 1802}
1803#endif /* USE_REL */
252b5132
RH		 1804
1805/* Relocate an ARM ELF section. */
1806static boolean
1807elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1808 contents, relocs, local_syms, local_sections)
1809 bfd * output_bfd;
1810 struct bfd_link_info * info;
1811 bfd * input_bfd;
1812 asection * input_section;
1813 bfd_byte * contents;
1814 Elf_Internal_Rela * relocs;
1815 Elf_Internal_Sym * local_syms;
1816 asection ** local_sections;
1817{
1818 Elf_Internal_Shdr * symtab_hdr;
1819 struct elf_link_hash_entry ** sym_hashes;
1820 Elf_Internal_Rela * rel;
1821 Elf_Internal_Rela * relend;
1822 const char * name;
1823
1824 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1825 sym_hashes = elf_sym_hashes (input_bfd);
1826
1827 rel = relocs;
1828 relend = relocs + input_section->reloc_count;
1829 for (; rel < relend; rel++)
1830 {
ba96a88f
NC		 1831 int r_type;
1832 reloc_howto_type * howto;
1833 unsigned long r_symndx;
1834 Elf_Internal_Sym * sym;
1835 asection * sec;
252b5132 1836 struct elf_link_hash_entry * h;
ba96a88f
NC		 1837 bfd_vma relocation;
1838 bfd_reloc_status_type r;
1839 arelent bfd_reloc;
f21f3fe0 1840
252b5132 1841 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 1842 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1843
ba96a88f
NC		 1844 if ( r_type == R_ARM_GNU_VTENTRY
1845 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 1846 continue;
1847
dc810e39
AM		 1848#ifdef USE_REL
1849 elf32_arm_info_to_howto (input_bfd, & bfd_reloc,
1850 (Elf_Internal_Rel *) rel);
1851#else
1852 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1853#endif
ba96a88f 1854 howto = bfd_reloc.howto;
252b5132
RH		 1855
1856 if (info->relocateable)
1857 {
1858 /* This is a relocateable link. We don't have to change
1859 anything, unless the reloc is against a section symbol,
1860 in which case we have to adjust according to where the
1861 section symbol winds up in the output section. */
1862 if (r_symndx < symtab_hdr->sh_info)
1863 {
1864 sym = local_syms + r_symndx;
1865 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1866 {
1867 sec = local_sections[r_symndx];
1868#ifdef USE_REL
98c1d4aa 1869 arm_add_to_rel (input_bfd, contents + rel->r_offset,
dc810e39
AM		 1870 howto,
1871 (bfd_signed_vma) (sec->output_offset
1872 + sym->st_value));
252b5132 1873#else
5fb1c3f2 1874 rel->r_addend += (sec->output_offset + sym->st_value);
252b5132
RH		 1875#endif
1876 }
1877 }
1878
1879 continue;
1880 }
1881
1882 /* This is a final link. */
1883 h = NULL;
1884 sym = NULL;
1885 sec = NULL;
9b485d32 1886
252b5132
RH		 1887 if (r_symndx < symtab_hdr->sh_info)
1888 {
1889 sym = local_syms + r_symndx;
1890 sec = local_sections[r_symndx];
f8df10f4 1891#ifdef USE_REL
252b5132
RH		 1892 relocation = (sec->output_section->vma
1893 + sec->output_offset
1894 + sym->st_value);
f8df10f4
JJ		 1895 if ((sec->flags & SEC_MERGE)
1896 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1897 {
1898 asection *msec;
1899 bfd_vma addend, value;
1900
1901 if (howto->rightshift)
1902 {
1903 (*_bfd_error_handler)
1904 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
1905 bfd_archive_filename (input_bfd),
1906 bfd_get_section_name (input_bfd, input_section),
1907 (long) rel->r_offset, howto->name);
1908 return false;
1909 }
1910
1911 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
1912
1913 /* Get the (signed) value from the instruction. */
1914 addend = value & howto->src_mask;
1915 if (addend & ((howto->src_mask + 1) >> 1))
1916 {
1917 bfd_signed_vma mask;
1918
1919 mask = -1;
1920 mask &= ~ howto->src_mask;
1921 addend |= mask;
1922 }
1923 msec = sec;
1924 addend =
c629eae0 1925 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
f8df10f4
JJ		 1926 - relocation;
1927 addend += msec->output_section->vma + msec->output_offset;
1928 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
1929 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
1930 }
1931#else
1932 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1933#endif
252b5132
RH		 1934 }
1935 else
1936 {
1937 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9b485d32
NC		 1938
1939 while ( h->root.type == bfd_link_hash_indirect
252b5132
RH		 1940 || h->root.type == bfd_link_hash_warning)
1941 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9b485d32
NC		 1942
1943 if ( h->root.type == bfd_link_hash_defined
252b5132
RH		 1944 || h->root.type == bfd_link_hash_defweak)
1945 {
780a67af 1946 int relocation_needed = 1;
f21f3fe0 1947
780a67af 1948 sec = h->root.u.def.section;
f21f3fe0 1949
252b5132 1950 /* In these cases, we don't need the relocation value.
f21f3fe0 1951 We check specially because in some obscure cases
9b485d32 1952 sec->output_section will be NULL. */
252b5132
RH		 1953 switch (r_type)
1954 {
1955 case R_ARM_PC24:
1956 case R_ARM_ABS32:
6a360bf4 1957 case R_ARM_THM_PC22:
252b5132
RH		 1958 if (info->shared
1959 && (
99e4ae17 1960 (!info->symbolic && h->dynindx != -1)
97eaf9de 1961 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132 1962 )
05924f36
PB		 1963 && ((input_section->flags & SEC_ALLOC) != 0
1964 /* DWARF will emit R_ARM_ABS32 relocations in its
1965 sections against symbols defined externally
1966 in shared libraries. We can't do anything
1967 with them here. */
1968 || ((input_section->flags & SEC_DEBUGGING) != 0
1969 && (h->elf_link_hash_flags
1970 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132 1971 )
780a67af 1972 relocation_needed = 0;
252b5132 1973 break;
f21f3fe0 1974
252b5132 1975 case R_ARM_GOTPC:
780a67af 1976 relocation_needed = 0;
252b5132 1977 break;
f21f3fe0 1978
252b5132
RH		 1979 case R_ARM_GOT32:
1980 if (elf_hash_table(info)->dynamic_sections_created
1981 && (!info->shared
1982 || (!info->symbolic && h->dynindx != -1)
1983 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1984 )
1985 )
780a67af 1986 relocation_needed = 0;
252b5132 1987 break;
f21f3fe0 1988
252b5132
RH		 1989 case R_ARM_PLT32:
1990 if (h->plt.offset != (bfd_vma)-1)
780a67af 1991 relocation_needed = 0;
252b5132 1992 break;
f21f3fe0 1993
252b5132
RH		 1994 default:
1995 if (sec->output_section == NULL)
1996 {
1997 (*_bfd_error_handler)
6a360bf4
NC		 1998 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
1999 bfd_archive_filename (input_bfd),
2000 r_type,
2001 h->root.root.string,
252b5132 2002 bfd_get_section_name (input_bfd, input_section));
780a67af 2003 relocation_needed = 0;
252b5132
RH		 2004 }
2005 }
780a67af
NC		 2006
2007 if (relocation_needed)
2008 relocation = h->root.u.def.value
2009 + sec->output_section->vma
2010 + sec->output_offset;
2011 else
2012 relocation = 0;
252b5132
RH		 2013 }
2014 else if (h->root.type == bfd_link_hash_undefweak)
2015 relocation = 0;
3a27a730
L		 2016 else if (info->shared && !info->symbolic
2017 && !info->no_undefined
2018 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
a72747a3 2019 relocation = 0;
252b5132
RH		 2020 else
2021 {
2022 if (!((*info->callbacks->undefined_symbol)
2023 (info, h->root.root.string, input_bfd,
5cc7c785 2024 input_section, rel->r_offset,
3a27a730
L		 2025 (!info->shared || info->no_undefined
2026 || ELF_ST_VISIBILITY (h->other)))))
252b5132
RH		 2027 return false;
2028 relocation = 0;
2029 }
2030 }
2031
2032 if (h != NULL)
2033 name = h->root.root.string;
2034 else
2035 {
2036 name = (bfd_elf_string_from_elf_section
2037 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2038 if (name == NULL || *name == '\0')
2039 name = bfd_section_name (input_bfd, sec);
2040 }
f21f3fe0 2041
252b5132
RH		 2042 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2043 input_section, contents, rel,
2044 relocation, info, sec, name,
2045 (h ? ELF_ST_TYPE (h->type) :
780a67af 2046 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH		 2047
2048 if (r != bfd_reloc_ok)
2049 {
2050 const char * msg = (const char *) 0;
2051
2052 switch (r)
2053 {
2054 case bfd_reloc_overflow:
cf919dfd
PB		 2055 /* If the overflowing reloc was to an undefined symbol,
2056 we have already printed one error message and there
2057 is no point complaining again. */
2058 if ((! h ||
2059 h->root.type != bfd_link_hash_undefined)
2060 && (!((*info->callbacks->reloc_overflow)
2061 (info, name, howto->name, (bfd_vma) 0,
2062 input_bfd, input_section, rel->r_offset))))
2063 return false;
252b5132
RH		 2064 break;
2065
2066 case bfd_reloc_undefined:
2067 if (!((*info->callbacks->undefined_symbol)
2068 (info, name, input_bfd, input_section,
5cc7c785 2069 rel->r_offset, true)))
252b5132
RH		 2070 return false;
2071 break;
2072
2073 case bfd_reloc_outofrange:
9b485d32 2074 msg = _("internal error: out of range error");
252b5132
RH		 2075 goto common_error;
2076
2077 case bfd_reloc_notsupported:
9b485d32 2078 msg = _("internal error: unsupported relocation error");
252b5132
RH		 2079 goto common_error;
2080
2081 case bfd_reloc_dangerous:
9b485d32 2082 msg = _("internal error: dangerous error");
252b5132
RH		 2083 goto common_error;
2084
2085 default:
9b485d32 2086 msg = _("internal error: unknown error");
252b5132
RH		 2087 /* fall through */
2088
2089 common_error:
2090 if (!((*info->callbacks->warning)
2091 (info, msg, name, input_bfd, input_section,
2092 rel->r_offset)))
2093 return false;
2094 break;
2095 }
2096 }
2097 }
2098
2099 return true;
2100}
2101
fc830a83 2102/* Function to keep ARM specific flags in the ELF header. */
252b5132
RH		 2103static boolean
2104elf32_arm_set_private_flags (abfd, flags)
2105 bfd *abfd;
2106 flagword flags;
2107{
2108 if (elf_flags_init (abfd)
2109 && elf_elfheader (abfd)->e_flags != flags)
2110 {
fc830a83
NC		 2111 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2112 {
fd2ec330 2113 if (flags & EF_ARM_INTERWORK)
8f615d07 2114 (*_bfd_error_handler) (_("\
252b5132 2115Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
8f615d07 2116 bfd_archive_filename (abfd));
fc830a83 2117 else
63b0f745 2118 _bfd_error_handler (_("\
252b5132 2119Warning: Clearing the interwork flag of %s due to outside request"),
63b0f745 2120 bfd_archive_filename (abfd));
fc830a83 2121 }
252b5132
RH		 2122 }
2123 else
2124 {
2125 elf_elfheader (abfd)->e_flags = flags;
2126 elf_flags_init (abfd) = true;
2127 }
2128
2129 return true;
2130}
2131
fc830a83 2132/* Copy backend specific data from one object module to another. */
9b485d32 2133
252b5132
RH		 2134static boolean
2135elf32_arm_copy_private_bfd_data (ibfd, obfd)
2136 bfd *ibfd;
2137 bfd *obfd;
2138{
2139 flagword in_flags;
2140 flagword out_flags;
2141
fc830a83 2142 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132
RH		 2143 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2144 return true;
2145
fc830a83 2146 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH		 2147 out_flags = elf_elfheader (obfd)->e_flags;
2148
fc830a83
NC		 2149 if (elf_flags_init (obfd)
2150 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2151 && in_flags != out_flags)
252b5132 2152 {
252b5132 2153 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 2154 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
252b5132
RH		 2155 return false;
2156
2157 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 2158 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
252b5132
RH		 2159 return false;
2160
2161 /* If the src and dest have different interworking flags
2162 then turn off the interworking bit. */
fd2ec330 2163 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 2164 {
fd2ec330 2165 if (out_flags & EF_ARM_INTERWORK)
63b0f745 2166 _bfd_error_handler (_("\
252b5132 2167Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
06317a27 2168 bfd_get_filename (obfd),
63b0f745 2169 bfd_archive_filename (ibfd));
252b5132 2170
fd2ec330 2171 in_flags &= ~EF_ARM_INTERWORK;
252b5132 2172 }
1006ba19
PB		 2173
2174 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB		 2175 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2176 in_flags &= ~EF_ARM_PIC;
252b5132
RH		 2177 }
2178
2179 elf_elfheader (obfd)->e_flags = in_flags;
2180 elf_flags_init (obfd) = true;
2181
2182 return true;
2183}
2184
2185/* Merge backend specific data from an object file to the output
2186 object file when linking. */
9b485d32 2187
252b5132
RH		 2188static boolean
2189elf32_arm_merge_private_bfd_data (ibfd, obfd)
fc830a83
NC		 2190 bfd * ibfd;
2191 bfd * obfd;
252b5132
RH		 2192{
2193 flagword out_flags;
2194 flagword in_flags;
1006ba19 2195 boolean flags_compatible = true;
cf919dfd
PB		 2196 boolean null_input_bfd = true;
2197 asection *sec;
252b5132 2198
9b485d32 2199 /* Check if we have the same endianess. */
1fe494a5
NC		 2200 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2201 return false;
2202
252b5132
RH		 2203 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2204 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2205 return true;
2206
252b5132
RH		 2207 /* The input BFD must have had its flags initialised. */
2208 /* The following seems bogus to me -- The flags are initialized in
2209 the assembler but I don't think an elf_flags_init field is
9b485d32 2210 written into the object. */
252b5132
RH		 2211 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2212
2213 in_flags = elf_elfheader (ibfd)->e_flags;
2214 out_flags = elf_elfheader (obfd)->e_flags;
2215
2216 if (!elf_flags_init (obfd))
2217 {
fe077fa6
NC		 2218 /* If the input is the default architecture and had the default
2219 flags then do not bother setting the flags for the output
2220 architecture, instead allow future merges to do this. If no
2221 future merges ever set these flags then they will retain their
2222 uninitialised values, which surprise surprise, correspond
252b5132 2223 to the default values. */
fe077fa6
NC		 2224 if (bfd_get_arch_info (ibfd)->the_default
2225 && elf_elfheader (ibfd)->e_flags == 0)
252b5132
RH		 2226 return true;
2227
2228 elf_flags_init (obfd) = true;
2229 elf_elfheader (obfd)->e_flags = in_flags;
2230
2231 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2232 && bfd_get_arch_info (obfd)->the_default)
2233 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2234
2235 return true;
2236 }
2237
1006ba19 2238 /* Identical flags must be compatible. */
252b5132
RH		 2239 if (in_flags == out_flags)
2240 return true;
2241
cf919dfd
PB		 2242 /* Check to see if the input BFD actually contains any sections.
2243 If not, its flags may not have been initialised either, but it cannot
2244 actually cause any incompatibility. */
2245 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2246 {
2247 /* Ignore synthetic glue sections. */
2248 if (strcmp (sec->name, ".glue_7")
2249 && strcmp (sec->name, ".glue_7t"))
2250 {
2251 null_input_bfd = false;
2252 break;
2253 }
2254 }
2255 if (null_input_bfd)
2256 return true;
2257
252b5132 2258 /* Complain about various flag mismatches. */
fc830a83
NC		 2259 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2260 {
63b0f745 2261 _bfd_error_handler (_("\
fc830a83 2262Error: %s compiled for EABI version %d, whereas %s is compiled for version %d"),
63b0f745
NC		 2263 bfd_archive_filename (ibfd),
2264 (in_flags & EF_ARM_EABIMASK) >> 24,
06317a27 2265 bfd_get_filename (obfd),
63b0f745 2266 (out_flags & EF_ARM_EABIMASK) >> 24);
1006ba19 2267 return false;
fc830a83 2268 }
252b5132 2269
1006ba19
PB		 2270 /* Not sure what needs to be checked for EABI versions >= 1. */
2271 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2272 {
fd2ec330 2273 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19 2274 {
63b0f745 2275 _bfd_error_handler (_("\
252b5132 2276Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
63b0f745
NC		 2277 bfd_archive_filename (ibfd),
2278 in_flags & EF_ARM_APCS_26 ? 26 : 32,
06317a27 2279 bfd_get_filename (obfd),
63b0f745 2280 out_flags & EF_ARM_APCS_26 ? 26 : 32);
1006ba19
PB		 2281 flags_compatible = false;
2282 }
252b5132 2283
fd2ec330 2284 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19 2285 {
5eefb65f
NC		 2286 if (in_flags & EF_ARM_APCS_FLOAT)
2287 _bfd_error_handler (_("\
2288Error: %s passes floats in FP registers, whereas %s passes them in integer registers"),
2289 bfd_archive_filename (ibfd),
2290 bfd_get_filename (obfd));
2291 else
2292 _bfd_error_handler (_("\
2293Error: %s passes floats in integer registers, whereas %s passes them in FP registers"),
2294 bfd_archive_filename (ibfd),
2295 bfd_get_filename (obfd));
63b0f745 2296
1006ba19
PB		 2297 flags_compatible = false;
2298 }
252b5132 2299
fd2ec330
PB		 2300#ifdef EF_ARM_SOFT_FLOAT
2301 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
1006ba19 2302 {
5eefb65f
NC		 2303 if (in_flags & EF_ARM_SOFT_FLOAT)
2304 _bfd_error_handler (_ ("\
2305Error: %s uses software FP, whereas %s uses hardware FP"),
2306 bfd_archive_filename (ibfd),
2307 bfd_get_filename (obfd));
2308 else
2309 _bfd_error_handler (_ ("\
2310Error: %s uses hardware FP, whereas %s uses software FP"),
2311 bfd_archive_filename (ibfd),
2312 bfd_get_filename (obfd));
63b0f745 2313
1006ba19
PB		 2314 flags_compatible = false;
2315 }
ee43f35e 2316#endif
252b5132 2317
1006ba19 2318 /* Interworking mismatch is only a warning. */
fd2ec330 2319 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8f615d07 2320 {
e3c8793a
NC		 2321 if (in_flags & EF_ARM_INTERWORK)
2322 {
2323 _bfd_error_handler (_("\
2324Warning: %s supports interworking, whereas %s does not"),
2325 bfd_archive_filename (ibfd),
2326 bfd_get_filename (obfd));
2327 }
2328 else
2329 {
2330 _bfd_error_handler (_("\
2331Warning: %s does not support interworking, whereas %s does"),
2332 bfd_archive_filename (ibfd),
2333 bfd_get_filename (obfd));
2334 }
8f615d07 2335 }
252b5132 2336 }
63b0f745 2337
1006ba19 2338 return flags_compatible;
252b5132
RH		 2339}
2340
9b485d32
NC		 2341/* Display the flags field. */
2342
252b5132
RH		 2343static boolean
2344elf32_arm_print_private_bfd_data (abfd, ptr)
2345 bfd *abfd;
2346 PTR ptr;
2347{
fc830a83
NC		 2348 FILE * file = (FILE *) ptr;
2349 unsigned long flags;
252b5132
RH		 2350
2351 BFD_ASSERT (abfd != NULL && ptr != NULL);
2352
2353 /* Print normal ELF private data. */
2354 _bfd_elf_print_private_bfd_data (abfd, ptr);
2355
fc830a83 2356 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC		 2357 /* Ignore init flag - it may not be set, despite the flags field
2358 containing valid data. */
252b5132
RH		 2359
2360 /* xgettext:c-format */
9b485d32 2361 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 2362
fc830a83
NC		 2363 switch (EF_ARM_EABI_VERSION (flags))
2364 {
2365 case EF_ARM_EABI_UNKNOWN:
2366 /* The following flag bits are GNU extenstions and not part of the
2367 official ARM ELF extended ABI. Hence they are only decoded if
2368 the EABI version is not set. */
fd2ec330 2369 if (flags & EF_ARM_INTERWORK)
9b485d32 2370 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 2371
fd2ec330 2372 if (flags & EF_ARM_APCS_26)
9b485d32 2373 fprintf (file, _(" [APCS-26]"));
fc830a83 2374 else
9b485d32 2375 fprintf (file, _(" [APCS-32]"));
9a5aca8c 2376
fd2ec330 2377 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 2378 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 2379
fd2ec330 2380 if (flags & EF_ARM_PIC)
9b485d32 2381 fprintf (file, _(" [position independent]"));
fc830a83 2382
fd2ec330 2383 if (flags & EF_ARM_NEW_ABI)
9b485d32 2384 fprintf (file, _(" [new ABI]"));
9a5aca8c 2385
fd2ec330 2386 if (flags & EF_ARM_OLD_ABI)
9b485d32 2387 fprintf (file, _(" [old ABI]"));
9a5aca8c 2388
fd2ec330 2389 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 2390 fprintf (file, _(" [software FP]"));
9a5aca8c 2391
fd2ec330
PB		 2392 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT | EF_ARM_PIC
2393 | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | EF_ARM_SOFT_FLOAT);
fc830a83 2394 break;
9a5aca8c 2395
fc830a83 2396 case EF_ARM_EABI_VER1:
9b485d32 2397 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 2398
fc830a83 2399 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 2400 fprintf (file, _(" [sorted symbol table]"));
fc830a83 2401 else
9b485d32 2402 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 2403
fc830a83
NC		 2404 flags &= ~ EF_ARM_SYMSARESORTED;
2405 break;
9a5aca8c 2406
fd2ec330
PB		 2407 case EF_ARM_EABI_VER2:
2408 fprintf (file, _(" [Version2 EABI]"));
2409
2410 if (flags & EF_ARM_SYMSARESORTED)
2411 fprintf (file, _(" [sorted symbol table]"));
2412 else
2413 fprintf (file, _(" [unsorted symbol table]"));
2414
2415 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2416 fprintf (file, _(" [dynamic symbols use segment index]"));
2417
2418 if (flags & EF_ARM_MAPSYMSFIRST)
2419 fprintf (file, _(" [mapping symbols precede others]"));
2420
99e4ae17 2421 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB		 2422 | EF_ARM_MAPSYMSFIRST);
2423 break;
2424
fc830a83 2425 default:
9b485d32 2426 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC		 2427 break;
2428 }
252b5132 2429
fc830a83 2430 flags &= ~ EF_ARM_EABIMASK;
252b5132 2431
fc830a83 2432 if (flags & EF_ARM_RELEXEC)
9b485d32 2433 fprintf (file, _(" [relocatable executable]"));
252b5132 2434
fc830a83 2435 if (flags & EF_ARM_HASENTRY)
9b485d32 2436 fprintf (file, _(" [has entry point]"));
252b5132 2437
fc830a83
NC		 2438 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2439
2440 if (flags)
9b485d32 2441 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 2442
252b5132
RH		 2443 fputc ('\n', file);
2444
2445 return true;
2446}
2447
2448static int
2449elf32_arm_get_symbol_type (elf_sym, type)
2450 Elf_Internal_Sym * elf_sym;
2451 int type;
2452{
2f0ca46a
NC		 2453 switch (ELF_ST_TYPE (elf_sym->st_info))
2454 {
2455 case STT_ARM_TFUNC:
2456 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 2457
2f0ca46a
NC		 2458 case STT_ARM_16BIT:
2459 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2460 This allows us to distinguish between data used by Thumb instructions
2461 and non-data (which is probably code) inside Thumb regions of an
2462 executable. */
2463 if (type != STT_OBJECT)
2464 return ELF_ST_TYPE (elf_sym->st_info);
2465 break;
9a5aca8c 2466
ce855c42
NC		 2467 default:
2468 break;
2f0ca46a
NC		 2469 }
2470
2471 return type;
252b5132 2472}
f21f3fe0 2473
252b5132
RH		 2474static asection *
2475elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2476 bfd *abfd;
5f771d47 2477 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2478 Elf_Internal_Rela *rel;
2479 struct elf_link_hash_entry *h;
2480 Elf_Internal_Sym *sym;
2481{
2482 if (h != NULL)
2483 {
2484 switch (ELF32_R_TYPE (rel->r_info))
2485 {
2486 case R_ARM_GNU_VTINHERIT:
2487 case R_ARM_GNU_VTENTRY:
2488 break;
2489
2490 default:
2491 switch (h->root.type)
2492 {
2493 case bfd_link_hash_defined:
2494 case bfd_link_hash_defweak:
2495 return h->root.u.def.section;
2496
2497 case bfd_link_hash_common:
2498 return h->root.u.c.p->section;
e049a0de
ILT		 2499
2500 default:
2501 break;
252b5132
RH		 2502 }
2503 }
2504 }
2505 else
2506 {
9ad5cbcf
AM		 2507 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2508 }
2509
252b5132
RH		 2510 return NULL;
2511}
2512
780a67af
NC		 2513/* Update the got entry reference counts for the section being removed. */
2514
252b5132
RH		 2515static boolean
2516elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 2517 bfd *abfd ATTRIBUTE_UNUSED;
2518 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2519 asection *sec ATTRIBUTE_UNUSED;
2520 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2521{
780a67af 2522 /* We don't support garbage collection of GOT and PLT relocs yet. */
252b5132
RH		 2523 return true;
2524}
2525
780a67af
NC		 2526/* Look through the relocs for a section during the first phase. */
2527
252b5132
RH		 2528static boolean
2529elf32_arm_check_relocs (abfd, info, sec, relocs)
2530 bfd * abfd;
2531 struct bfd_link_info * info;
2532 asection * sec;
2533 const Elf_Internal_Rela * relocs;
2534{
2535 Elf_Internal_Shdr * symtab_hdr;
2536 struct elf_link_hash_entry ** sym_hashes;
2537 struct elf_link_hash_entry ** sym_hashes_end;
2538 const Elf_Internal_Rela * rel;
2539 const Elf_Internal_Rela * rel_end;
2540 bfd * dynobj;
2541 asection * sgot, *srelgot, *sreloc;
2542 bfd_vma * local_got_offsets;
9a5aca8c 2543
252b5132
RH		 2544 if (info->relocateable)
2545 return true;
9a5aca8c 2546
252b5132 2547 sgot = srelgot = sreloc = NULL;
9a5aca8c 2548
252b5132
RH		 2549 dynobj = elf_hash_table (info)->dynobj;
2550 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2551
252b5132
RH		 2552 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2553 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC		 2554 sym_hashes_end = sym_hashes
2555 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2556
252b5132
RH		 2557 if (!elf_bad_symtab (abfd))
2558 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 2559
252b5132
RH		 2560 rel_end = relocs + sec->reloc_count;
2561 for (rel = relocs; rel < rel_end; rel++)
2562 {
2563 struct elf_link_hash_entry *h;
2564 unsigned long r_symndx;
9a5aca8c 2565
252b5132
RH		 2566 r_symndx = ELF32_R_SYM (rel->r_info);
2567 if (r_symndx < symtab_hdr->sh_info)
2568 h = NULL;
2569 else
2570 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 2571
252b5132
RH		 2572 /* Some relocs require a global offset table. */
2573 if (dynobj == NULL)
2574 {
2575 switch (ELF32_R_TYPE (rel->r_info))
2576 {
2577 case R_ARM_GOT32:
2578 case R_ARM_GOTOFF:
2579 case R_ARM_GOTPC:
2580 elf_hash_table (info)->dynobj = dynobj = abfd;
2581 if (! _bfd_elf_create_got_section (dynobj, info))
2582 return false;
2583 break;
2584
2585 default:
2586 break;
2587 }
2588 }
2589
2590 switch (ELF32_R_TYPE (rel->r_info))
2591 {
2592 case R_ARM_GOT32:
2593 /* This symbol requires a global offset table entry. */
2594 if (sgot == NULL)
2595 {
2596 sgot = bfd_get_section_by_name (dynobj, ".got");
2597 BFD_ASSERT (sgot != NULL);
2598 }
2599
2600 /* Get the got relocation section if necessary. */
2601 if (srelgot == NULL
2602 && (h != NULL || info->shared))
2603 {
2604 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
9a5aca8c 2605
252b5132
RH		 2606 /* If no got relocation section, make one and initialize. */
2607 if (srelgot == NULL)
2608 {
2609 srelgot = bfd_make_section (dynobj, ".rel.got");
2610 if (srelgot == NULL
2611 || ! bfd_set_section_flags (dynobj, srelgot,
99e4ae17 2612 (SEC_ALLOC
252b5132
RH		 2613 | SEC_LOAD
2614 | SEC_HAS_CONTENTS
2615 | SEC_IN_MEMORY
2616 | SEC_LINKER_CREATED
2617 | SEC_READONLY))
2618 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2619 return false;
2620 }
2621 }
2622
2623 if (h != NULL)
2624 {
2625 if (h->got.offset != (bfd_vma) -1)
2626 /* We have already allocated space in the .got. */
2627 break;
f21f3fe0 2628
252b5132
RH		 2629 h->got.offset = sgot->_raw_size;
2630
2631 /* Make sure this symbol is output as a dynamic symbol. */
2632 if (h->dynindx == -1)
2633 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2634 return false;
2635
2636 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2637 }
2638 else
2639 {
99e4ae17 2640 /* This is a global offset table entry for a local
252b5132
RH		 2641 symbol. */
2642 if (local_got_offsets == NULL)
2643 {
dc810e39 2644 bfd_size_type size;
63b0f745 2645 unsigned int i;
252b5132 2646
dc810e39
AM		 2647 size = symtab_hdr->sh_info;
2648 size *= sizeof (bfd_vma);
252b5132
RH		 2649 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2650 if (local_got_offsets == NULL)
2651 return false;
2652 elf_local_got_offsets (abfd) = local_got_offsets;
2653 for (i = 0; i < symtab_hdr->sh_info; i++)
2654 local_got_offsets[i] = (bfd_vma) -1;
2655 }
f21f3fe0 2656
252b5132
RH		 2657 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2658 /* We have already allocated space in the .got. */
2659 break;
2660
2661 local_got_offsets[r_symndx] = sgot->_raw_size;
2662
2663 if (info->shared)
2664 /* If we are generating a shared object, we need to
2665 output a R_ARM_RELATIVE reloc so that the dynamic
2666 linker can adjust this GOT entry. */
2667 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2668 }
2669
2670 sgot->_raw_size += 4;
2671 break;
2672
99e4ae17 2673 case R_ARM_PLT32:
252b5132
RH		 2674 /* This symbol requires a procedure linkage table entry. We
2675 actually build the entry in adjust_dynamic_symbol,
2676 because this might be a case of linking PIC code which is
2677 never referenced by a dynamic object, in which case we
2678 don't need to generate a procedure linkage table entry
2679 after all. */
2680
2681 /* If this is a local symbol, we resolve it directly without
2682 creating a procedure linkage table entry. */
2683 if (h == NULL)
2684 continue;
2685
2686 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2687 break;
2688
2689 case R_ARM_ABS32:
2690 case R_ARM_REL32:
2691 case R_ARM_PC24:
2692 /* If we are creating a shared library, and this is a reloc
2693 against a global symbol, or a non PC relative reloc
2694 against a local symbol, then we need to copy the reloc
2695 into the shared library. However, if we are linking with
2696 -Bsymbolic, we do not need to copy a reloc against a
2697 global symbol which is defined in an object we are
2698 including in the link (i.e., DEF_REGULAR is set). At
2699 this point we have not seen all the input files, so it is
2700 possible that DEF_REGULAR is not set now but will be set
2701 later (it is never cleared). We account for that
2702 possibility below by storing information in the
2703 pcrel_relocs_copied field of the hash table entry. */
2704 if (info->shared
2705 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2706 || (h != NULL
2707 && (! info->symbolic
2708 || (h->elf_link_hash_flags
2709 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2710 {
2711 /* When creating a shared object, we must copy these
2712 reloc types into the output file. We create a reloc
2713 section in dynobj and make room for this reloc. */
2714 if (sreloc == NULL)
2715 {
2716 const char * name;
2717
2718 name = (bfd_elf_string_from_elf_section
2719 (abfd,
2720 elf_elfheader (abfd)->e_shstrndx,
2721 elf_section_data (sec)->rel_hdr.sh_name));
2722 if (name == NULL)
2723 return false;
2724
2725 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 2726 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH		 2727 name + 4) == 0);
2728
2729 sreloc = bfd_get_section_by_name (dynobj, name);
2730 if (sreloc == NULL)
2731 {
2732 flagword flags;
2733
2734 sreloc = bfd_make_section (dynobj, name);
2735 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2736 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2737 if ((sec->flags & SEC_ALLOC) != 0)
2738 flags |= SEC_ALLOC | SEC_LOAD;
2739 if (sreloc == NULL
2740 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2741 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2742 return false;
2743 }
99e4ae17
AJ		 2744 if (sec->flags & SEC_READONLY)
2745 info->flags |= DF_TEXTREL;
252b5132
RH		 2746 }
2747
2748 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2749 /* If we are linking with -Bsymbolic, and this is a
2750 global symbol, we count the number of PC relative
2751 relocations we have entered for this symbol, so that
2752 we can discard them again if the symbol is later
2753 defined by a regular object. Note that this function
2754 is only called if we are using an elf_i386 linker
2755 hash table, which means that h is really a pointer to
2756 an elf_i386_link_hash_entry. */
2757 if (h != NULL && info->symbolic
2758 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2759 {
2760 struct elf32_arm_link_hash_entry * eh;
2761 struct elf32_arm_pcrel_relocs_copied * p;
2762
2763 eh = (struct elf32_arm_link_hash_entry *) h;
2764
2765 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2766 if (p->section == sreloc)
2767 break;
2768
2769 if (p == NULL)
2770 {
2771 p = ((struct elf32_arm_pcrel_relocs_copied *)
dc810e39 2772 bfd_alloc (dynobj, (bfd_size_type) sizeof * p));
252b5132
RH		 2773 if (p == NULL)
2774 return false;
2775 p->next = eh->pcrel_relocs_copied;
2776 eh->pcrel_relocs_copied = p;
2777 p->section = sreloc;
2778 p->count = 0;
2779 }
2780
2781 ++p->count;
2782 }
2783 }
2784 break;
2785
2786 /* This relocation describes the C++ object vtable hierarchy.
2787 Reconstruct it for later use during GC. */
2788 case R_ARM_GNU_VTINHERIT:
2789 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2790 return false;
2791 break;
9a5aca8c 2792
252b5132
RH		 2793 /* This relocation describes which C++ vtable entries are actually
2794 used. Record for later use during GC. */
2795 case R_ARM_GNU_VTENTRY:
d512aa07 2796 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
252b5132
RH		 2797 return false;
2798 break;
2799 }
2800 }
f21f3fe0 2801
252b5132
RH		 2802 return true;
2803}
2804
252b5132
RH		 2805/* Find the nearest line to a particular section and offset, for error
2806 reporting. This code is a duplicate of the code in elf.c, except
9b485d32 2807 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
252b5132
RH		 2808
2809static boolean
2810elf32_arm_find_nearest_line
2811 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2812 bfd * abfd;
2813 asection * section;
2814 asymbol ** symbols;
2815 bfd_vma offset;
917583ad
NC		 2816 const char ** filename_ptr;
2817 const char ** functionname_ptr;
252b5132
RH		 2818 unsigned int * line_ptr;
2819{
2820 boolean found;
2821 const char * filename;
2822 asymbol * func;
2823 bfd_vma low_func;
2824 asymbol ** p;
2825
2826 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 2827 filename_ptr, functionname_ptr,
857ec808
NC		 2828 line_ptr, 0,
2829 &elf_tdata (abfd)->dwarf2_find_line_info))
252b5132
RH		 2830 return true;
2831
2832 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2833 &found, filename_ptr,
2834 functionname_ptr, line_ptr,
2835 &elf_tdata (abfd)->line_info))
2836 return false;
f21f3fe0 2837
252b5132
RH		 2838 if (found)
2839 return true;
2840
2841 if (symbols == NULL)
2842 return false;
2843
2844 filename = NULL;
2845 func = NULL;
2846 low_func = 0;
2847
2848 for (p = symbols; *p != NULL; p++)
2849 {
2850 elf_symbol_type *q;
2851
2852 q = (elf_symbol_type *) *p;
2853
2854 if (bfd_get_section (&q->symbol) != section)
2855 continue;
2856
2857 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2858 {
2859 default:
2860 break;
2861 case STT_FILE:
2862 filename = bfd_asymbol_name (&q->symbol);
2863 break;
2864 case STT_NOTYPE:
2865 case STT_FUNC:
2866 case STT_ARM_TFUNC:
2867 if (q->symbol.section == section
2868 && q->symbol.value >= low_func
2869 && q->symbol.value <= offset)
2870 {
2871 func = (asymbol *) q;
2872 low_func = q->symbol.value;
2873 }
2874 break;
2875 }
2876 }
2877
2878 if (func == NULL)
2879 return false;
2880
2881 *filename_ptr = filename;
2882 *functionname_ptr = bfd_asymbol_name (func);
2883 *line_ptr = 0;
f21f3fe0 2884
252b5132
RH		 2885 return true;
2886}
2887
2888/* Adjust a symbol defined by a dynamic object and referenced by a
2889 regular object. The current definition is in some section of the
2890 dynamic object, but we're not including those sections. We have to
2891 change the definition to something the rest of the link can
2892 understand. */
2893
2894static boolean
2895elf32_arm_adjust_dynamic_symbol (info, h)
2896 struct bfd_link_info * info;
2897 struct elf_link_hash_entry * h;
2898{
2899 bfd * dynobj;
2900 asection * s;
2901 unsigned int power_of_two;
2902
2903 dynobj = elf_hash_table (info)->dynobj;
2904
2905 /* Make sure we know what is going on here. */
2906 BFD_ASSERT (dynobj != NULL
2907 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2908 || h->weakdef != NULL
2909 || ((h->elf_link_hash_flags
2910 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2911 && (h->elf_link_hash_flags
2912 & ELF_LINK_HASH_REF_REGULAR) != 0
2913 && (h->elf_link_hash_flags
2914 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2915
2916 /* If this is a function, put it in the procedure linkage table. We
2917 will fill in the contents of the procedure linkage table later,
2918 when we know the address of the .got section. */
2919 if (h->type == STT_FUNC
2920 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2921 {
2922 if (! info->shared
2923 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2924 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2925 {
2926 /* This case can occur if we saw a PLT32 reloc in an input
2927 file, but the symbol was never referred to by a dynamic
2928 object. In such a case, we don't actually need to build
2929 a procedure linkage table, and we can just do a PC32
2930 reloc instead. */
2931 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2932 return true;
2933 }
2934
2935 /* Make sure this symbol is output as a dynamic symbol. */
2936 if (h->dynindx == -1)
2937 {
2938 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2939 return false;
2940 }
2941
2942 s = bfd_get_section_by_name (dynobj, ".plt");
2943 BFD_ASSERT (s != NULL);
2944
2945 /* If this is the first .plt entry, make room for the special
2946 first entry. */
2947 if (s->_raw_size == 0)
2948 s->_raw_size += PLT_ENTRY_SIZE;
2949
2950 /* If this symbol is not defined in a regular file, and we are
2951 not generating a shared library, then set the symbol to this
2952 location in the .plt. This is required to make function
2953 pointers compare as equal between the normal executable and
2954 the shared library. */
2955 if (! info->shared
2956 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2957 {
2958 h->root.u.def.section = s;
2959 h->root.u.def.value = s->_raw_size;
2960 }
2961
2962 h->plt.offset = s->_raw_size;
2963
2964 /* Make room for this entry. */
2965 s->_raw_size += PLT_ENTRY_SIZE;
2966
2967 /* We also need to make an entry in the .got.plt section, which
2968 will be placed in the .got section by the linker script. */
252b5132
RH		 2969 s = bfd_get_section_by_name (dynobj, ".got.plt");
2970 BFD_ASSERT (s != NULL);
2971 s->_raw_size += 4;
2972
2973 /* We also need to make an entry in the .rel.plt section. */
2974
2975 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2976 BFD_ASSERT (s != NULL);
2977 s->_raw_size += sizeof (Elf32_External_Rel);
2978
2979 return true;
2980 }
2981
2982 /* If this is a weak symbol, and there is a real definition, the
2983 processor independent code will have arranged for us to see the
2984 real definition first, and we can just use the same value. */
2985 if (h->weakdef != NULL)
2986 {
2987 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2988 || h->weakdef->root.type == bfd_link_hash_defweak);
2989 h->root.u.def.section = h->weakdef->root.u.def.section;
2990 h->root.u.def.value = h->weakdef->root.u.def.value;
2991 return true;
2992 }
2993
2994 /* This is a reference to a symbol defined by a dynamic object which
2995 is not a function. */
2996
2997 /* If we are creating a shared library, we must presume that the
2998 only references to the symbol are via the global offset table.
2999 For such cases we need not do anything here; the relocations will
3000 be handled correctly by relocate_section. */
3001 if (info->shared)
3002 return true;
3003
3004 /* We must allocate the symbol in our .dynbss section, which will
3005 become part of the .bss section of the executable. There will be
3006 an entry for this symbol in the .dynsym section. The dynamic
3007 object will contain position independent code, so all references
3008 from the dynamic object to this symbol will go through the global
3009 offset table. The dynamic linker will use the .dynsym entry to
3010 determine the address it must put in the global offset table, so
3011 both the dynamic object and the regular object will refer to the
3012 same memory location for the variable. */
252b5132
RH		 3013 s = bfd_get_section_by_name (dynobj, ".dynbss");
3014 BFD_ASSERT (s != NULL);
3015
3016 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
3017 copy the initial value out of the dynamic object and into the
3018 runtime process image. We need to remember the offset into the
3019 .rel.bss section we are going to use. */
3020 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3021 {
3022 asection *srel;
3023
3024 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
3025 BFD_ASSERT (srel != NULL);
3026 srel->_raw_size += sizeof (Elf32_External_Rel);
3027 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3028 }
3029
3030 /* We need to figure out the alignment required for this symbol. I
3031 have no idea how ELF linkers handle this. */
3032 power_of_two = bfd_log2 (h->size);
3033 if (power_of_two > 3)
3034 power_of_two = 3;
3035
3036 /* Apply the required alignment. */
3037 s->_raw_size = BFD_ALIGN (s->_raw_size,
3038 (bfd_size_type) (1 << power_of_two));
3039 if (power_of_two > bfd_get_section_alignment (dynobj, s))
3040 {
3041 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
3042 return false;
3043 }
3044
3045 /* Define the symbol as being at this point in the section. */
3046 h->root.u.def.section = s;
3047 h->root.u.def.value = s->_raw_size;
3048
3049 /* Increment the section size to make room for the symbol. */
3050 s->_raw_size += h->size;
3051
3052 return true;
3053}
3054
3055/* Set the sizes of the dynamic sections. */
3056
3057static boolean
3058elf32_arm_size_dynamic_sections (output_bfd, info)
99e4ae17 3059 bfd * output_bfd ATTRIBUTE_UNUSED;
252b5132
RH		 3060 struct bfd_link_info * info;
3061{
3062 bfd * dynobj;
3063 asection * s;
3064 boolean plt;
3065 boolean relocs;
252b5132
RH		 3066
3067 dynobj = elf_hash_table (info)->dynobj;
3068 BFD_ASSERT (dynobj != NULL);
3069
3070 if (elf_hash_table (info)->dynamic_sections_created)
3071 {
3072 /* Set the contents of the .interp section to the interpreter. */
3073 if (! info->shared)
3074 {
3075 s = bfd_get_section_by_name (dynobj, ".interp");
3076 BFD_ASSERT (s != NULL);
3077 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3078 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3079 }
3080 }
3081 else
3082 {
3083 /* We may have created entries in the .rel.got section.
3084 However, if we are not creating the dynamic sections, we will
3085 not actually use these entries. Reset the size of .rel.got,
3086 which will cause it to get stripped from the output file
3087 below. */
3088 s = bfd_get_section_by_name (dynobj, ".rel.got");
3089 if (s != NULL)
3090 s->_raw_size = 0;
3091 }
3092
3093 /* If this is a -Bsymbolic shared link, then we need to discard all
3094 PC relative relocs against symbols defined in a regular object.
3095 We allocated space for them in the check_relocs routine, but we
3096 will not fill them in in the relocate_section routine. */
3097 if (info->shared && info->symbolic)
3098 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
3099 elf32_arm_discard_copies,
3100 (PTR) NULL);
3101
3102 /* The check_relocs and adjust_dynamic_symbol entry points have
3103 determined the sizes of the various dynamic sections. Allocate
3104 memory for them. */
3105 plt = false;
3106 relocs = false;
252b5132
RH		 3107 for (s = dynobj->sections; s != NULL; s = s->next)
3108 {
3109 const char * name;
3110 boolean strip;
3111
3112 if ((s->flags & SEC_LINKER_CREATED) == 0)
3113 continue;
3114
3115 /* It's OK to base decisions on the section name, because none
3116 of the dynobj section names depend upon the input files. */
3117 name = bfd_get_section_name (dynobj, s);
3118
3119 strip = false;
3120
3121 if (strcmp (name, ".plt") == 0)
3122 {
3123 if (s->_raw_size == 0)
3124 {
3125 /* Strip this section if we don't need it; see the
3126 comment below. */
3127 strip = true;
3128 }
3129 else
3130 {
3131 /* Remember whether there is a PLT. */
3132 plt = true;
3133 }
3134 }
3135 else if (strncmp (name, ".rel", 4) == 0)
3136 {
3137 if (s->_raw_size == 0)
3138 {
3139 /* If we don't need this section, strip it from the
3140 output file. This is mostly to handle .rel.bss and
3141 .rel.plt. We must create both sections in
3142 create_dynamic_sections, because they must be created
3143 before the linker maps input sections to output
3144 sections. The linker does that before
3145 adjust_dynamic_symbol is called, and it is that
3146 function which decides whether anything needs to go
3147 into these sections. */
3148 strip = true;
3149 }
3150 else
3151 {
252b5132
RH		 3152 /* Remember whether there are any reloc sections other
3153 than .rel.plt. */
3154 if (strcmp (name, ".rel.plt") != 0)
99e4ae17 3155 relocs = true;
252b5132
RH		 3156
3157 /* We use the reloc_count field as a counter if we need
3158 to copy relocs into the output file. */
3159 s->reloc_count = 0;
3160 }
3161 }
3162 else if (strncmp (name, ".got", 4) != 0)
3163 {
3164 /* It's not one of our sections, so don't allocate space. */
3165 continue;
3166 }
3167
3168 if (strip)
3169 {
3170 asection ** spp;
3171
3172 for (spp = &s->output_section->owner->sections;
3173 *spp != s->output_section;
3174 spp = &(*spp)->next)
3175 ;
3176 *spp = s->output_section->next;
3177 --s->output_section->owner->section_count;
3178
3179 continue;
3180 }
3181
3182 /* Allocate memory for the section contents. */
3183 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3184 if (s->contents == NULL && s->_raw_size != 0)
3185 return false;
3186 }
3187
3188 if (elf_hash_table (info)->dynamic_sections_created)
3189 {
3190 /* Add some entries to the .dynamic section. We fill in the
3191 values later, in elf32_arm_finish_dynamic_sections, but we
3192 must add the entries now so that we get the correct size for
3193 the .dynamic section. The DT_DEBUG entry is filled in by the
3194 dynamic linker and used by the debugger. */
dc810e39
AM		 3195#define add_dynamic_entry(TAG, VAL) \
3196 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3197
3198 if (!info->shared)
252b5132 3199 {
dc810e39 3200 if (!add_dynamic_entry (DT_DEBUG, 0))
252b5132
RH		 3201 return false;
3202 }
3203
3204 if (plt)
3205 {
dc810e39
AM		 3206 if ( !add_dynamic_entry (DT_PLTGOT, 0)
3207 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3208 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3209 || !add_dynamic_entry (DT_JMPREL, 0))
252b5132
RH		 3210 return false;
3211 }
3212
3213 if (relocs)
3214 {
dc810e39
AM		 3215 if ( !add_dynamic_entry (DT_REL, 0)
3216 || !add_dynamic_entry (DT_RELSZ, 0)
3217 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
252b5132
RH		 3218 return false;
3219 }
3220
99e4ae17 3221 if ((info->flags & DF_TEXTREL) != 0)
252b5132 3222 {
dc810e39 3223 if (!add_dynamic_entry (DT_TEXTREL, 0))
252b5132 3224 return false;
d6cf2879 3225 info->flags |= DF_TEXTREL;
252b5132
RH		 3226 }
3227 }
dc810e39 3228#undef add_synamic_entry
252b5132
RH		 3229
3230 return true;
3231}
3232
3233/* This function is called via elf32_arm_link_hash_traverse if we are
3234 creating a shared object with -Bsymbolic. It discards the space
3235 allocated to copy PC relative relocs against symbols which are
3236 defined in regular objects. We allocated space for them in the
3237 check_relocs routine, but we won't fill them in in the
3238 relocate_section routine. */
3239
3240static boolean
3241elf32_arm_discard_copies (h, ignore)
3242 struct elf32_arm_link_hash_entry * h;
5f771d47 3243 PTR ignore ATTRIBUTE_UNUSED;
252b5132
RH		 3244{
3245 struct elf32_arm_pcrel_relocs_copied * s;
3246
3247 /* We only discard relocs for symbols defined in a regular object. */
3248 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3249 return true;
3250
3251 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3252 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
3253
3254 return true;
3255}
3256
3257/* Finish up dynamic symbol handling. We set the contents of various
3258 dynamic sections here. */
3259
3260static boolean
3261elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3262 bfd * output_bfd;
3263 struct bfd_link_info * info;
3264 struct elf_link_hash_entry * h;
3265 Elf_Internal_Sym * sym;
3266{
3267 bfd * dynobj;
3268
3269 dynobj = elf_hash_table (info)->dynobj;
3270
3271 if (h->plt.offset != (bfd_vma) -1)
3272 {
3273 asection * splt;
3274 asection * sgot;
3275 asection * srel;
3276 bfd_vma plt_index;
3277 bfd_vma got_offset;
3278 Elf_Internal_Rel rel;
3279
3280 /* This symbol has an entry in the procedure linkage table. Set
3281 it up. */
3282
3283 BFD_ASSERT (h->dynindx != -1);
3284
3285 splt = bfd_get_section_by_name (dynobj, ".plt");
3286 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3287 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
3288 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
3289
3290 /* Get the index in the procedure linkage table which
3291 corresponds to this symbol. This is the index of this symbol
3292 in all the symbols for which we are making plt entries. The
3293 first entry in the procedure linkage table is reserved. */
3294 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3295
3296 /* Get the offset into the .got table of the entry that
3297 corresponds to this function. Each .got entry is 4 bytes.
3298 The first three are reserved. */
3299 got_offset = (plt_index + 3) * 4;
3300
3301 /* Fill in the entry in the procedure linkage table. */
f7a74f8c
NC		 3302 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0],
3303 splt->contents + h->plt.offset + 0);
3304 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1],
3305 splt->contents + h->plt.offset + 4);
3306 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2],
3307 splt->contents + h->plt.offset + 8);
252b5132
RH		 3308 bfd_put_32 (output_bfd,
3309 (sgot->output_section->vma
3310 + sgot->output_offset
f21f3fe0 3311 + got_offset
252b5132
RH		 3312 - splt->output_section->vma
3313 - splt->output_offset
3314 - h->plt.offset - 12),
3315 splt->contents + h->plt.offset + 12);
3316
3317 /* Fill in the entry in the global offset table. */
3318 bfd_put_32 (output_bfd,
3319 (splt->output_section->vma
3320 + splt->output_offset),
3321 sgot->contents + got_offset);
3322
3323 /* Fill in the entry in the .rel.plt section. */
3324 rel.r_offset = (sgot->output_section->vma
3325 + sgot->output_offset
3326 + got_offset);
3327 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
3328 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3329 ((Elf32_External_Rel *) srel->contents
3330 + plt_index));
3331
3332 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3333 {
3334 /* Mark the symbol as undefined, rather than as defined in
3335 the .plt section. Leave the value alone. */
3336 sym->st_shndx = SHN_UNDEF;
d982ba73
PB		 3337 /* If the symbol is weak, we do need to clear the value.
3338 Otherwise, the PLT entry would provide a definition for
3339 the symbol even if the symbol wasn't defined anywhere,
3340 and so the symbol would never be NULL. */
3341 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3342 == 0)
3343 sym->st_value = 0;
252b5132
RH		 3344 }
3345 }
3346
3347 if (h->got.offset != (bfd_vma) -1)
3348 {
3349 asection * sgot;
3350 asection * srel;
3351 Elf_Internal_Rel rel;
3352
3353 /* This symbol has an entry in the global offset table. Set it
3354 up. */
252b5132
RH		 3355 sgot = bfd_get_section_by_name (dynobj, ".got");
3356 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3357 BFD_ASSERT (sgot != NULL && srel != NULL);
3358
3359 rel.r_offset = (sgot->output_section->vma
3360 + sgot->output_offset
dc810e39 3361 + (h->got.offset &~ (bfd_vma) 1));
252b5132
RH		 3362
3363 /* If this is a -Bsymbolic link, and the symbol is defined
3364 locally, we just want to emit a RELATIVE reloc. The entry in
3365 the global offset table will already have been initialized in
3366 the relocate_section function. */
3367 if (info->shared
3368 && (info->symbolic || h->dynindx == -1)
3369 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3370 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3371 else
3372 {
3373 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3374 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3375 }
3376
3377 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3378 ((Elf32_External_Rel *) srel->contents
3379 + srel->reloc_count));
3380 ++srel->reloc_count;
3381 }
3382
3383 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3384 {
3385 asection * s;
3386 Elf_Internal_Rel rel;
3387
3388 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH		 3389 BFD_ASSERT (h->dynindx != -1
3390 && (h->root.type == bfd_link_hash_defined
3391 || h->root.type == bfd_link_hash_defweak));
3392
3393 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3394 ".rel.bss");
3395 BFD_ASSERT (s != NULL);
3396
3397 rel.r_offset = (h->root.u.def.value
3398 + h->root.u.def.section->output_section->vma
3399 + h->root.u.def.section->output_offset);
3400 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3401 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3402 ((Elf32_External_Rel *) s->contents
3403 + s->reloc_count));
3404 ++s->reloc_count;
3405 }
3406
3407 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3408 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3409 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3410 sym->st_shndx = SHN_ABS;
3411
3412 return true;
3413}
3414
3415/* Finish up the dynamic sections. */
3416
3417static boolean
3418elf32_arm_finish_dynamic_sections (output_bfd, info)
3419 bfd * output_bfd;
3420 struct bfd_link_info * info;
3421{
3422 bfd * dynobj;
3423 asection * sgot;
3424 asection * sdyn;
3425
3426 dynobj = elf_hash_table (info)->dynobj;
3427
3428 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3429 BFD_ASSERT (sgot != NULL);
3430 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3431
3432 if (elf_hash_table (info)->dynamic_sections_created)
3433 {
3434 asection *splt;
3435 Elf32_External_Dyn *dyncon, *dynconend;
3436
3437 splt = bfd_get_section_by_name (dynobj, ".plt");
3438 BFD_ASSERT (splt != NULL && sdyn != NULL);
3439
3440 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3441 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
9b485d32 3442
252b5132
RH		 3443 for (; dyncon < dynconend; dyncon++)
3444 {
3445 Elf_Internal_Dyn dyn;
3446 const char * name;
3447 asection * s;
3448
3449 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3450
3451 switch (dyn.d_tag)
3452 {
3453 default:
3454 break;
3455
3456 case DT_PLTGOT:
3457 name = ".got";
3458 goto get_vma;
3459 case DT_JMPREL:
3460 name = ".rel.plt";
3461 get_vma:
3462 s = bfd_get_section_by_name (output_bfd, name);
3463 BFD_ASSERT (s != NULL);
3464 dyn.d_un.d_ptr = s->vma;
3465 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3466 break;
3467
3468 case DT_PLTRELSZ:
3469 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3470 BFD_ASSERT (s != NULL);
3471 if (s->_cooked_size != 0)
3472 dyn.d_un.d_val = s->_cooked_size;
3473 else
3474 dyn.d_un.d_val = s->_raw_size;
3475 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3476 break;
3477
3478 case DT_RELSZ:
3479 /* My reading of the SVR4 ABI indicates that the
3480 procedure linkage table relocs (DT_JMPREL) should be
3481 included in the overall relocs (DT_REL). This is
3482 what Solaris does. However, UnixWare can not handle
3483 that case. Therefore, we override the DT_RELSZ entry
3484 here to make it not include the JMPREL relocs. Since
3485 the linker script arranges for .rel.plt to follow all
3486 other relocation sections, we don't have to worry
3487 about changing the DT_REL entry. */
3488 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3489 if (s != NULL)
3490 {
3491 if (s->_cooked_size != 0)
3492 dyn.d_un.d_val -= s->_cooked_size;
3493 else
3494 dyn.d_un.d_val -= s->_raw_size;
3495 }
3496 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3497 break;
3498 }
3499 }
3500
3501 /* Fill in the first entry in the procedure linkage table. */
3502 if (splt->_raw_size > 0)
f7a74f8c
NC		 3503 {
3504 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
3505 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
3506 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
3507 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
3508 }
252b5132
RH		 3509
3510 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3511 really seem like the right value. */
3512 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3513 }
3514
3515 /* Fill in the first three entries in the global offset table. */
3516 if (sgot->_raw_size > 0)
3517 {
3518 if (sdyn == NULL)
3519 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3520 else
3521 bfd_put_32 (output_bfd,
3522 sdyn->output_section->vma + sdyn->output_offset,
3523 sgot->contents);
3524 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3525 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3526 }
3527
3528 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3529
3530 return true;
3531}
3532
ba96a88f
NC		 3533static void
3534elf32_arm_post_process_headers (abfd, link_info)
3535 bfd * abfd;
5f771d47 3536 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f 3537{
9b485d32 3538 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
ba96a88f
NC		 3539
3540 i_ehdrp = elf_elfheader (abfd);
3541
3542 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3543 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3544}
3545
99e4ae17 3546static enum elf_reloc_type_class
f51e552e
AM		 3547elf32_arm_reloc_type_class (rela)
3548 const Elf_Internal_Rela *rela;
99e4ae17 3549{
f51e552e 3550 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ		 3551 {
3552 case R_ARM_RELATIVE:
3553 return reloc_class_relative;
3554 case R_ARM_JUMP_SLOT:
3555 return reloc_class_plt;
3556 case R_ARM_COPY:
3557 return reloc_class_copy;
3558 default:
3559 return reloc_class_normal;
3560 }
3561}
3562
3563
252b5132
RH		 3564#define ELF_ARCH bfd_arch_arm
3565#define ELF_MACHINE_CODE EM_ARM
f21f3fe0 3566#define ELF_MAXPAGESIZE 0x8000
252b5132 3567
99e4ae17
AJ		 3568#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3569#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH		 3570#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3571#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3572#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 3573#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132
RH		 3574#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3575
3576#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3577#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3578#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3579#define elf_backend_check_relocs elf32_arm_check_relocs
dc810e39 3580#define elf_backend_relocate_section elf32_arm_relocate_section
252b5132
RH		 3581#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3582#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3583#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3584#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3585#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 3586#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 3587#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
252b5132
RH		 3588
3589#define elf_backend_can_gc_sections 1
3590#define elf_backend_plt_readonly 1
3591#define elf_backend_want_got_plt 1
3592#define elf_backend_want_plt_sym 0
3593
04f7c78d
NC		 3594#define elf_backend_got_header_size 12
3595#define elf_backend_plt_header_size PLT_ENTRY_SIZE
3596
252b5132 3597#include "elf32-target.h"
GDB Binutils - Deliverables
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