1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 typedef unsigned long int insn32;
26 typedef unsigned short int insn16;
28 static bfd_boolean elf32_arm_set_private_flags
29 PARAMS ((bfd *, flagword));
30 static bfd_boolean elf32_arm_copy_private_bfd_data
31 PARAMS ((bfd *, bfd *));
32 static bfd_boolean elf32_arm_merge_private_bfd_data
33 PARAMS ((bfd *, bfd *));
34 static bfd_boolean elf32_arm_print_private_bfd_data
35 PARAMS ((bfd *, PTR));
36 static int elf32_arm_get_symbol_type
37 PARAMS (( Elf_Internal_Sym *, int));
38 static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
40 static bfd_reloc_status_type elf32_arm_final_link_relocate
41 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
43 const char *, int, struct elf_link_hash_entry *));
44 static insn32 insert_thumb_branch
45 PARAMS ((insn32, int));
46 static struct elf_link_hash_entry *find_thumb_glue
47 PARAMS ((struct bfd_link_info *, const char *, bfd *));
48 static struct elf_link_hash_entry *find_arm_glue
49 PARAMS ((struct bfd_link_info *, const char *, bfd *));
50 static void elf32_arm_post_process_headers
51 PARAMS ((bfd *, struct bfd_link_info *));
52 static int elf32_arm_to_thumb_stub
53 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
54 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
55 static int elf32_thumb_to_arm_stub
56 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
57 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
58 static bfd_boolean elf32_arm_relocate_section
59 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
60 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
61 static asection * elf32_arm_gc_mark_hook
62 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
63 struct elf_link_hash_entry *, Elf_Internal_Sym *));
64 static bfd_boolean elf32_arm_gc_sweep_hook
65 PARAMS ((bfd *, struct bfd_link_info *, asection *,
66 const Elf_Internal_Rela *));
67 static bfd_boolean elf32_arm_check_relocs
68 PARAMS ((bfd *, struct bfd_link_info *, asection *,
69 const Elf_Internal_Rela *));
70 static bfd_boolean elf32_arm_find_nearest_line
71 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
72 const char **, unsigned int *));
73 static bfd_boolean elf32_arm_adjust_dynamic_symbol
74 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
75 static bfd_boolean elf32_arm_size_dynamic_sections
76 PARAMS ((bfd *, struct bfd_link_info *));
77 static bfd_boolean elf32_arm_finish_dynamic_symbol
78 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
80 static bfd_boolean elf32_arm_finish_dynamic_sections
81 PARAMS ((bfd *, struct bfd_link_info *));
82 static struct bfd_hash_entry * elf32_arm_link_hash_newfunc
83 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
85 static void arm_add_to_rel
86 PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma));
88 static bfd_boolean allocate_dynrelocs
89 PARAMS ((struct elf_link_hash_entry *h, PTR inf));
90 static bfd_boolean create_got_section
91 PARAMS ((bfd * dynobj, struct bfd_link_info * info));
92 static bfd_boolean elf32_arm_create_dynamic_sections
93 PARAMS ((bfd * dynobj, struct bfd_link_info * info));
94 static enum elf_reloc_type_class elf32_arm_reloc_type_class
95 PARAMS ((const Elf_Internal_Rela *));
96 static bfd_boolean elf32_arm_object_p
99 #ifndef ELFARM_NABI_C_INCLUDED
100 static void record_arm_to_thumb_glue
101 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
102 static void record_thumb_to_arm_glue
103 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
104 bfd_boolean bfd_elf32_arm_allocate_interworking_sections
105 PARAMS ((struct bfd_link_info *));
106 bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
107 PARAMS ((bfd *, struct bfd_link_info *));
108 bfd_boolean bfd_elf32_arm_process_before_allocation
109 PARAMS ((bfd *, struct bfd_link_info *, int));
113 #define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
115 /* The linker script knows the section names for placement.
116 The entry_names are used to do simple name mangling on the stubs.
117 Given a function name, and its type, the stub can be found. The
118 name can be changed. The only requirement is the %s be present. */
119 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
120 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
122 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
123 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
125 /* The name of the dynamic interpreter. This is put in the .interp
127 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
131 /* The size in bytes of the special first entry in the procedure
133 #define PLT_HEADER_SIZE 16
135 /* The size in bytes of an entry in the procedure linkage table. */
136 #define PLT_ENTRY_SIZE 16
138 /* The first entry in a procedure linkage table looks like
139 this. It is set up so that any shared library function that is
140 called before the relocation has been set up calls the dynamic
142 static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
144 0xe52de004, /* str lr, [sp, #-4]! */
145 0xe59fe010, /* ldr lr, [pc, #16] */
146 0xe08fe00e, /* add lr, pc, lr */
147 0xe5bef008, /* ldr pc, [lr, #8]! */
150 /* Subsequent entries in a procedure linkage table look like
152 static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
154 0xe28fc600, /* add ip, pc, #NN */
155 0xe28cca00, /* add ip, ip, #NN */
156 0xe5bcf000, /* ldr pc, [ip, #NN]! */
157 0x00000000, /* unused */
162 /* The size in bytes of the special first entry in the procedure
164 #define PLT_HEADER_SIZE 20
166 /* The size in bytes of an entry in the procedure linkage table. */
167 #define PLT_ENTRY_SIZE 12
169 /* The first entry in a procedure linkage table looks like
170 this. It is set up so that any shared library function that is
171 called before the relocation has been set up calls the dynamic
173 static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
175 0xe52de004, /* str lr, [sp, #-4]! */
176 0xe59fe004, /* ldr lr, [pc, #4] */
177 0xe08fe00e, /* add lr, pc, lr */
178 0xe5bef008, /* ldr pc, [lr, #8]! */
179 0x00000000, /* &GOT[0] - . */
182 /* Subsequent entries in a procedure linkage table look like
184 static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
186 0xe28fc600, /* add ip, pc, #0xNN00000 */
187 0xe28cca00, /* add ip, ip, #0xNN000 */
188 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
193 /* The ARM linker needs to keep track of the number of relocs that it
194 decides to copy in check_relocs for each symbol. This is so that
195 it can discard PC relative relocs if it doesn't need them when
196 linking with -Bsymbolic. We store the information in a field
197 extending the regular ELF linker hash table. */
199 /* This structure keeps track of the number of PC relative relocs we
200 have copied for a given symbol. */
201 struct elf32_arm_relocs_copied
204 struct elf32_arm_relocs_copied * next;
205 /* A section in dynobj. */
207 /* Number of relocs copied in this section. */
211 /* Arm ELF linker hash entry. */
212 struct elf32_arm_link_hash_entry
214 struct elf_link_hash_entry root;
216 /* Number of PC relative relocs copied for this symbol. */
217 struct elf32_arm_relocs_copied * relocs_copied;
220 /* Traverse an arm ELF linker hash table. */
221 #define elf32_arm_link_hash_traverse(table, func, info) \
222 (elf_link_hash_traverse \
224 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
227 /* Get the ARM elf linker hash table from a link_info structure. */
228 #define elf32_arm_hash_table(info) \
229 ((struct elf32_arm_link_hash_table *) ((info)->hash))
231 /* ARM ELF linker hash table. */
232 struct elf32_arm_link_hash_table
234 /* The main hash table. */
235 struct elf_link_hash_table root;
237 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
238 bfd_size_type thumb_glue_size;
240 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
241 bfd_size_type arm_glue_size;
243 /* An arbitrary input BFD chosen to hold the glue sections. */
244 bfd * bfd_of_glue_owner;
246 /* A boolean indicating whether knowledge of the ARM's pipeline
247 length should be applied by the linker. */
248 int no_pipeline_knowledge;
250 /* Short-cuts to get to dynamic linker sections. */
259 /* Small local sym to section mapping cache. */
260 struct sym_sec_cache sym_sec;
263 /* Create an entry in an ARM ELF linker hash table. */
265 static struct bfd_hash_entry *
266 elf32_arm_link_hash_newfunc (entry, table, string)
267 struct bfd_hash_entry * entry;
268 struct bfd_hash_table * table;
271 struct elf32_arm_link_hash_entry * ret =
272 (struct elf32_arm_link_hash_entry *) entry;
274 /* Allocate the structure if it has not already been allocated by a
276 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
277 ret = ((struct elf32_arm_link_hash_entry *)
278 bfd_hash_allocate (table,
279 sizeof (struct elf32_arm_link_hash_entry)));
280 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
281 return (struct bfd_hash_entry *) ret;
283 /* Call the allocation method of the superclass. */
284 ret = ((struct elf32_arm_link_hash_entry *)
285 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
287 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
288 ret->relocs_copied = NULL;
290 return (struct bfd_hash_entry *) ret;
293 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
294 shortcuts to them in our hash table. */
297 create_got_section (dynobj, info)
299 struct bfd_link_info *info;
301 struct elf32_arm_link_hash_table *htab;
303 if (! _bfd_elf_create_got_section (dynobj, info))
306 htab = elf32_arm_hash_table (info);
307 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
308 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
309 if (!htab->sgot || !htab->sgotplt)
312 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
313 if (htab->srelgot == NULL
314 || ! bfd_set_section_flags (dynobj, htab->srelgot,
315 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
316 | SEC_IN_MEMORY | SEC_LINKER_CREATED
318 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
323 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
324 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
328 elf32_arm_create_dynamic_sections (dynobj, info)
330 struct bfd_link_info *info;
332 struct elf32_arm_link_hash_table *htab;
334 htab = elf32_arm_hash_table (info);
335 if (!htab->sgot && !create_got_section (dynobj, info))
338 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
341 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
342 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
343 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
345 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
347 if (!htab->splt || !htab->srelplt || !htab->sdynbss
348 || (!info->shared && !htab->srelbss))
354 /* Copy the extra info we tack onto an elf_link_hash_entry. */
357 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
358 struct elf_link_hash_entry *dir,
359 struct elf_link_hash_entry *ind)
361 struct elf32_arm_link_hash_entry *edir, *eind;
363 edir = (struct elf32_arm_link_hash_entry *) dir;
364 eind = (struct elf32_arm_link_hash_entry *) ind;
366 if (eind->relocs_copied != NULL)
368 if (edir->relocs_copied != NULL)
370 struct elf32_arm_relocs_copied **pp;
371 struct elf32_arm_relocs_copied *p;
373 if (ind->root.type == bfd_link_hash_indirect)
376 /* Add reloc counts against the weak sym to the strong sym
377 list. Merge any entries against the same section. */
378 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
380 struct elf32_arm_relocs_copied *q;
382 for (q = edir->relocs_copied; q != NULL; q = q->next)
383 if (q->section == p->section)
385 q->count += p->count;
392 *pp = edir->relocs_copied;
395 edir->relocs_copied = eind->relocs_copied;
396 eind->relocs_copied = NULL;
399 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
402 /* Create an ARM elf linker hash table. */
404 static struct bfd_link_hash_table *
405 elf32_arm_link_hash_table_create (abfd)
408 struct elf32_arm_link_hash_table *ret;
409 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
411 ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt);
412 if (ret == (struct elf32_arm_link_hash_table *) NULL)
415 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
416 elf32_arm_link_hash_newfunc))
429 ret->thumb_glue_size = 0;
430 ret->arm_glue_size = 0;
431 ret->bfd_of_glue_owner = NULL;
432 ret->no_pipeline_knowledge = 0;
433 ret->sym_sec.abfd = NULL;
435 return &ret->root.root;
438 /* Locate the Thumb encoded calling stub for NAME. */
440 static struct elf_link_hash_entry *
441 find_thumb_glue (link_info, name, input_bfd)
442 struct bfd_link_info *link_info;
447 struct elf_link_hash_entry *hash;
448 struct elf32_arm_link_hash_table *hash_table;
450 /* We need a pointer to the armelf specific hash table. */
451 hash_table = elf32_arm_hash_table (link_info);
453 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
454 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
456 BFD_ASSERT (tmp_name);
458 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
460 hash = elf_link_hash_lookup
461 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
464 /* xgettext:c-format */
465 (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"),
466 bfd_archive_filename (input_bfd), tmp_name, name);
473 /* Locate the ARM encoded calling stub for NAME. */
475 static struct elf_link_hash_entry *
476 find_arm_glue (link_info, name, input_bfd)
477 struct bfd_link_info *link_info;
482 struct elf_link_hash_entry *myh;
483 struct elf32_arm_link_hash_table *hash_table;
485 /* We need a pointer to the elfarm specific hash table. */
486 hash_table = elf32_arm_hash_table (link_info);
488 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
489 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
491 BFD_ASSERT (tmp_name);
493 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
495 myh = elf_link_hash_lookup
496 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
499 /* xgettext:c-format */
500 (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"),
501 bfd_archive_filename (input_bfd), tmp_name, name);
515 .word func @ behave as if you saw a ARM_32 reloc. */
517 #define ARM2THUMB_GLUE_SIZE 12
518 static const insn32 a2t1_ldr_insn = 0xe59fc000;
519 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
520 static const insn32 a2t3_func_addr_insn = 0x00000001;
522 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
526 __func_from_thumb: __func_from_thumb:
528 nop ldr r6, __func_addr
530 __func_change_to_arm: bx r6
532 __func_back_to_thumb:
538 #define THUMB2ARM_GLUE_SIZE 8
539 static const insn16 t2a1_bx_pc_insn = 0x4778;
540 static const insn16 t2a2_noop_insn = 0x46c0;
541 static const insn32 t2a3_b_insn = 0xea000000;
543 #ifndef ELFARM_NABI_C_INCLUDED
545 bfd_elf32_arm_allocate_interworking_sections (info)
546 struct bfd_link_info * info;
550 struct elf32_arm_link_hash_table * globals;
552 globals = elf32_arm_hash_table (info);
554 BFD_ASSERT (globals != NULL);
556 if (globals->arm_glue_size != 0)
558 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
560 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
561 ARM2THUMB_GLUE_SECTION_NAME);
563 BFD_ASSERT (s != NULL);
565 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
566 globals->arm_glue_size);
568 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
572 if (globals->thumb_glue_size != 0)
574 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
576 s = bfd_get_section_by_name
577 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
579 BFD_ASSERT (s != NULL);
581 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
582 globals->thumb_glue_size);
584 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
592 record_arm_to_thumb_glue (link_info, h)
593 struct bfd_link_info * link_info;
594 struct elf_link_hash_entry * h;
596 const char * name = h->root.root.string;
599 struct elf_link_hash_entry * myh;
600 struct bfd_link_hash_entry * bh;
601 struct elf32_arm_link_hash_table * globals;
604 globals = elf32_arm_hash_table (link_info);
606 BFD_ASSERT (globals != NULL);
607 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
609 s = bfd_get_section_by_name
610 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
612 BFD_ASSERT (s != NULL);
614 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
615 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
617 BFD_ASSERT (tmp_name);
619 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
621 myh = elf_link_hash_lookup
622 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
626 /* We've already seen this guy. */
631 /* The only trick here is using hash_table->arm_glue_size as the value. Even
632 though the section isn't allocated yet, this is where we will be putting
635 val = globals->arm_glue_size + 1;
636 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
637 tmp_name, BSF_GLOBAL, s, val,
638 NULL, TRUE, FALSE, &bh);
642 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
648 record_thumb_to_arm_glue (link_info, h)
649 struct bfd_link_info *link_info;
650 struct elf_link_hash_entry *h;
652 const char *name = h->root.root.string;
655 struct elf_link_hash_entry *myh;
656 struct bfd_link_hash_entry *bh;
657 struct elf32_arm_link_hash_table *hash_table;
661 hash_table = elf32_arm_hash_table (link_info);
663 BFD_ASSERT (hash_table != NULL);
664 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
666 s = bfd_get_section_by_name
667 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
669 BFD_ASSERT (s != NULL);
671 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
672 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
674 BFD_ASSERT (tmp_name);
676 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
678 myh = elf_link_hash_lookup
679 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
683 /* We've already seen this guy. */
689 val = hash_table->thumb_glue_size + 1;
690 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
691 tmp_name, BSF_GLOBAL, s, val,
692 NULL, TRUE, FALSE, &bh);
694 /* If we mark it 'Thumb', the disassembler will do a better job. */
695 myh = (struct elf_link_hash_entry *) bh;
696 bind = ELF_ST_BIND (myh->type);
697 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
701 #define CHANGE_TO_ARM "__%s_change_to_arm"
702 #define BACK_FROM_ARM "__%s_back_from_arm"
704 /* Allocate another symbol to mark where we switch to Arm mode. */
705 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
706 + strlen (CHANGE_TO_ARM) + 1);
708 BFD_ASSERT (tmp_name);
710 sprintf (tmp_name, CHANGE_TO_ARM, name);
713 val = hash_table->thumb_glue_size + 4,
714 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
715 tmp_name, BSF_LOCAL, s, val,
716 NULL, TRUE, FALSE, &bh);
720 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
725 /* Add the glue sections to ABFD. This function is called from the
726 linker scripts in ld/emultempl/{armelf}.em. */
729 bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info)
731 struct bfd_link_info *info;
736 /* If we are only performing a partial
737 link do not bother adding the glue. */
738 if (info->relocatable)
741 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
745 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
746 will prevent elf_link_input_bfd() from processing the contents
748 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
750 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
753 || !bfd_set_section_flags (abfd, sec, flags)
754 || !bfd_set_section_alignment (abfd, sec, 2))
757 /* Set the gc mark to prevent the section from being removed by garbage
758 collection, despite the fact that no relocs refer to this section. */
762 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
766 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
768 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
771 || !bfd_set_section_flags (abfd, sec, flags)
772 || !bfd_set_section_alignment (abfd, sec, 2))
781 /* Select a BFD to be used to hold the sections used by the glue code.
782 This function is called from the linker scripts in ld/emultempl/
786 bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
788 struct bfd_link_info *info;
790 struct elf32_arm_link_hash_table *globals;
792 /* If we are only performing a partial link
793 do not bother getting a bfd to hold the glue. */
794 if (info->relocatable)
797 globals = elf32_arm_hash_table (info);
799 BFD_ASSERT (globals != NULL);
801 if (globals->bfd_of_glue_owner != NULL)
804 /* Save the bfd for later use. */
805 globals->bfd_of_glue_owner = abfd;
811 bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
813 struct bfd_link_info *link_info;
814 int no_pipeline_knowledge;
816 Elf_Internal_Shdr *symtab_hdr;
817 Elf_Internal_Rela *internal_relocs = NULL;
818 Elf_Internal_Rela *irel, *irelend;
819 bfd_byte *contents = NULL;
822 struct elf32_arm_link_hash_table *globals;
824 /* If we are only performing a partial link do not bother
825 to construct any glue. */
826 if (link_info->relocatable)
829 /* Here we have a bfd that is to be included on the link. We have a hook
830 to do reloc rummaging, before section sizes are nailed down. */
831 globals = elf32_arm_hash_table (link_info);
833 BFD_ASSERT (globals != NULL);
834 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
836 globals->no_pipeline_knowledge = no_pipeline_knowledge;
838 /* Rummage around all the relocs and map the glue vectors. */
839 sec = abfd->sections;
844 for (; sec != NULL; sec = sec->next)
846 if (sec->reloc_count == 0)
849 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
851 /* Load the relocs. */
853 = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL,
854 (Elf_Internal_Rela *) NULL, FALSE);
856 if (internal_relocs == NULL)
859 irelend = internal_relocs + sec->reloc_count;
860 for (irel = internal_relocs; irel < irelend; irel++)
863 unsigned long r_index;
865 struct elf_link_hash_entry *h;
867 r_type = ELF32_R_TYPE (irel->r_info);
868 r_index = ELF32_R_SYM (irel->r_info);
870 /* These are the only relocation types we care about. */
871 if ( r_type != R_ARM_PC24
872 && r_type != R_ARM_THM_PC22)
875 /* Get the section contents if we haven't done so already. */
876 if (contents == NULL)
878 /* Get cached copy if it exists. */
879 if (elf_section_data (sec)->this_hdr.contents != NULL)
880 contents = elf_section_data (sec)->this_hdr.contents;
883 /* Go get them off disk. */
884 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
885 if (contents == NULL)
888 if (!bfd_get_section_contents (abfd, sec, contents,
889 (file_ptr) 0, sec->_raw_size))
894 /* If the relocation is not against a symbol it cannot concern us. */
897 /* We don't care about local symbols. */
898 if (r_index < symtab_hdr->sh_info)
901 /* This is an external symbol. */
902 r_index -= symtab_hdr->sh_info;
903 h = (struct elf_link_hash_entry *)
904 elf_sym_hashes (abfd)[r_index];
906 /* If the relocation is against a static symbol it must be within
907 the current section and so cannot be a cross ARM/Thumb relocation. */
914 /* This one is a call from arm code. We need to look up
915 the target of the call. If it is a thumb target, we
917 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
918 record_arm_to_thumb_glue (link_info, h);
922 /* This one is a call from thumb code. We look
923 up the target of the call. If it is not a thumb
924 target, we insert glue. */
925 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
926 record_thumb_to_arm_glue (link_info, h);
935 && elf_section_data (sec)->this_hdr.contents != contents)
939 if (internal_relocs != NULL
940 && elf_section_data (sec)->relocs != internal_relocs)
941 free (internal_relocs);
942 internal_relocs = NULL;
949 && elf_section_data (sec)->this_hdr.contents != contents)
951 if (internal_relocs != NULL
952 && elf_section_data (sec)->relocs != internal_relocs)
953 free (internal_relocs);
959 /* The thumb form of a long branch is a bit finicky, because the offset
960 encoding is split over two fields, each in it's own instruction. They
961 can occur in any order. So given a thumb form of long branch, and an
962 offset, insert the offset into the thumb branch and return finished
965 It takes two thumb instructions to encode the target address. Each has
966 11 bits to invest. The upper 11 bits are stored in one (identified by
967 H-0.. see below), the lower 11 bits are stored in the other (identified
970 Combine together and shifted left by 1 (it's a half word address) and
974 H-0, upper address-0 = 000
976 H-1, lower address-0 = 800
978 They can be ordered either way, but the arm tools I've seen always put
979 the lower one first. It probably doesn't matter. krk@cygnus.com
981 XXX: Actually the order does matter. The second instruction (H-1)
982 moves the computed address into the PC, so it must be the second one
983 in the sequence. The problem, however is that whilst little endian code
984 stores the instructions in HI then LOW order, big endian code does the
985 reverse. nickc@cygnus.com. */
987 #define LOW_HI_ORDER 0xF800F000
988 #define HI_LOW_ORDER 0xF000F800
991 insert_thumb_branch (br_insn, rel_off)
995 unsigned int low_bits;
996 unsigned int high_bits;
998 BFD_ASSERT ((rel_off & 1) != 1);
1000 rel_off >>= 1; /* Half word aligned address. */
1001 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
1002 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
1004 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
1005 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
1006 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
1007 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
1009 /* FIXME: abort is probably not the right call. krk@cygnus.com */
1010 abort (); /* error - not a valid branch instruction form. */
1015 /* Thumb code calling an ARM function. */
1018 elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
1019 hit_data, sym_sec, offset, addend, val)
1020 struct bfd_link_info * info;
1024 asection * input_section;
1025 bfd_byte * hit_data;
1028 bfd_signed_vma addend;
1033 unsigned long int tmp;
1034 long int ret_offset;
1035 struct elf_link_hash_entry * myh;
1036 struct elf32_arm_link_hash_table * globals;
1038 myh = find_thumb_glue (info, name, input_bfd);
1042 globals = elf32_arm_hash_table (info);
1044 BFD_ASSERT (globals != NULL);
1045 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1047 my_offset = myh->root.u.def.value;
1049 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1050 THUMB2ARM_GLUE_SECTION_NAME);
1052 BFD_ASSERT (s != NULL);
1053 BFD_ASSERT (s->contents != NULL);
1054 BFD_ASSERT (s->output_section != NULL);
1056 if ((my_offset & 0x01) == 0x01)
1059 && sym_sec->owner != NULL
1060 && !INTERWORK_FLAG (sym_sec->owner))
1062 (*_bfd_error_handler)
1063 (_("%s(%s): warning: interworking not enabled."),
1064 bfd_archive_filename (sym_sec->owner), name);
1065 (*_bfd_error_handler)
1066 (_(" first occurrence: %s: thumb call to arm"),
1067 bfd_archive_filename (input_bfd));
1073 myh->root.u.def.value = my_offset;
1075 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
1076 s->contents + my_offset);
1078 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
1079 s->contents + my_offset + 2);
1082 /* Address of destination of the stub. */
1083 ((bfd_signed_vma) val)
1085 /* Offset from the start of the current section to the start of the stubs. */
1087 /* Offset of the start of this stub from the start of the stubs. */
1089 /* Address of the start of the current section. */
1090 + s->output_section->vma)
1091 /* The branch instruction is 4 bytes into the stub. */
1093 /* ARM branches work from the pc of the instruction + 8. */
1096 bfd_put_32 (output_bfd,
1097 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
1098 s->contents + my_offset + 4);
1101 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
1103 /* Now go back and fix up the original BL insn to point to here. */
1105 /* Address of where the stub is located. */
1106 (s->output_section->vma + s->output_offset + my_offset)
1107 /* Address of where the BL is located. */
1108 - (input_section->output_section->vma + input_section->output_offset + offset)
1109 /* Addend in the relocation. */
1111 /* Biassing for PC-relative addressing. */
1114 tmp = bfd_get_32 (input_bfd, hit_data
1115 - input_section->vma);
1117 bfd_put_32 (output_bfd,
1118 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
1119 hit_data - input_section->vma);
1124 /* Arm code calling a Thumb function. */
1127 elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
1128 hit_data, sym_sec, offset, addend, val)
1129 struct bfd_link_info * info;
1133 asection * input_section;
1134 bfd_byte * hit_data;
1137 bfd_signed_vma addend;
1140 unsigned long int tmp;
1143 long int ret_offset;
1144 struct elf_link_hash_entry * myh;
1145 struct elf32_arm_link_hash_table * globals;
1147 myh = find_arm_glue (info, name, input_bfd);
1151 globals = elf32_arm_hash_table (info);
1153 BFD_ASSERT (globals != NULL);
1154 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1156 my_offset = myh->root.u.def.value;
1157 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1158 ARM2THUMB_GLUE_SECTION_NAME);
1159 BFD_ASSERT (s != NULL);
1160 BFD_ASSERT (s->contents != NULL);
1161 BFD_ASSERT (s->output_section != NULL);
1163 if ((my_offset & 0x01) == 0x01)
1166 && sym_sec->owner != NULL
1167 && !INTERWORK_FLAG (sym_sec->owner))
1169 (*_bfd_error_handler)
1170 (_("%s(%s): warning: interworking not enabled."),
1171 bfd_archive_filename (sym_sec->owner), name);
1172 (*_bfd_error_handler)
1173 (_(" first occurrence: %s: arm call to thumb"),
1174 bfd_archive_filename (input_bfd));
1178 myh->root.u.def.value = my_offset;
1180 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
1181 s->contents + my_offset);
1183 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
1184 s->contents + my_offset + 4);
1186 /* It's a thumb address. Add the low order bit. */
1187 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
1188 s->contents + my_offset + 8);
1191 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1193 tmp = bfd_get_32 (input_bfd, hit_data);
1194 tmp = tmp & 0xFF000000;
1196 /* Somehow these are both 4 too far, so subtract 8. */
1197 ret_offset = (s->output_offset
1199 + s->output_section->vma
1200 - (input_section->output_offset
1201 + input_section->output_section->vma
1205 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
1207 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
1212 /* Perform a relocation as part of a final link. */
1214 static bfd_reloc_status_type
1215 elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1216 input_section, contents, rel, value,
1217 info, sym_sec, sym_name, sym_flags, h)
1218 reloc_howto_type * howto;
1221 asection * input_section;
1222 bfd_byte * contents;
1223 Elf_Internal_Rela * rel;
1225 struct bfd_link_info * info;
1227 const char * sym_name;
1229 struct elf_link_hash_entry * h;
1231 unsigned long r_type = howto->type;
1232 unsigned long r_symndx;
1233 bfd_byte * hit_data = contents + rel->r_offset;
1234 bfd * dynobj = NULL;
1235 Elf_Internal_Shdr * symtab_hdr;
1236 struct elf_link_hash_entry ** sym_hashes;
1237 bfd_vma * local_got_offsets;
1238 asection * sgot = NULL;
1239 asection * splt = NULL;
1240 asection * sreloc = NULL;
1242 bfd_signed_vma signed_addend;
1243 struct elf32_arm_link_hash_table * globals;
1245 /* If the start address has been set, then set the EF_ARM_HASENTRY
1246 flag. Setting this more than once is redundant, but the cost is
1247 not too high, and it keeps the code simple.
1249 The test is done here, rather than somewhere else, because the
1250 start address is only set just before the final link commences.
1252 Note - if the user deliberately sets a start address of 0, the
1253 flag will not be set. */
1254 if (bfd_get_start_address (output_bfd) != 0)
1255 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
1257 globals = elf32_arm_hash_table (info);
1259 dynobj = elf_hash_table (info)->dynobj;
1262 sgot = bfd_get_section_by_name (dynobj, ".got");
1263 splt = bfd_get_section_by_name (dynobj, ".plt");
1265 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1266 sym_hashes = elf_sym_hashes (input_bfd);
1267 local_got_offsets = elf_local_got_offsets (input_bfd);
1268 r_symndx = ELF32_R_SYM (rel->r_info);
1271 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1273 if (addend & ((howto->src_mask + 1) >> 1))
1276 signed_addend &= ~ howto->src_mask;
1277 signed_addend |= addend;
1280 signed_addend = addend;
1282 addend = signed_addend = rel->r_addend;
1288 return bfd_reloc_ok;
1297 /* r_symndx will be zero only for relocs against symbols
1298 from removed linkonce sections, or sections discarded by
1301 return bfd_reloc_ok;
1303 /* Handle relocations which should use the PLT entry. ABS32/REL32
1304 will use the symbol's value, which may point to a PLT entry, but we
1305 don't need to handle that here. If we created a PLT entry, all
1306 branches in this object should go to it. */
1307 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
1310 && h->plt.offset != (bfd_vma) -1)
1312 /* If we've created a .plt section, and assigned a PLT entry to
1313 this function, it should not be known to bind locally. If
1314 it were, we would have cleared the PLT entry. */
1315 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
1317 value = (splt->output_section->vma
1318 + splt->output_offset
1320 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1321 contents, rel->r_offset, value,
1325 /* When generating a shared object, these relocations are copied
1326 into the output file to be resolved at run time. */
1328 && (input_section->flags & SEC_ALLOC)
1329 && (r_type != R_ARM_REL32
1330 || !SYMBOL_CALLS_LOCAL (info, h))
1332 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1333 || h->root.type != bfd_link_hash_undefweak)
1334 && r_type != R_ARM_PC24
1335 && r_type != R_ARM_PLT32)
1337 Elf_Internal_Rela outrel;
1339 bfd_boolean skip, relocate;
1345 name = (bfd_elf_string_from_elf_section
1347 elf_elfheader (input_bfd)->e_shstrndx,
1348 elf_section_data (input_section)->rel_hdr.sh_name));
1350 return bfd_reloc_notsupported;
1352 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1353 && strcmp (bfd_get_section_name (input_bfd,
1357 sreloc = bfd_get_section_by_name (dynobj, name);
1358 BFD_ASSERT (sreloc != NULL);
1365 _bfd_elf_section_offset (output_bfd, info, input_section,
1367 if (outrel.r_offset == (bfd_vma) -1)
1369 else if (outrel.r_offset == (bfd_vma) -2)
1370 skip = TRUE, relocate = TRUE;
1371 outrel.r_offset += (input_section->output_section->vma
1372 + input_section->output_offset);
1375 memset (&outrel, 0, sizeof outrel);
1380 || (h->elf_link_hash_flags
1381 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1382 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1385 /* This symbol is local, or marked to become local. */
1387 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1390 loc = sreloc->contents;
1391 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
1392 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
1394 /* If this reloc is against an external symbol, we do not want to
1395 fiddle with the addend. Otherwise, we need to include the symbol
1396 value so that it becomes an addend for the dynamic reloc. */
1398 return bfd_reloc_ok;
1400 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1401 contents, rel->r_offset, value,
1404 else switch (r_type)
1407 case R_ARM_XPC25: /* Arm BLX instruction. */
1409 case R_ARM_PC24: /* Arm B/BL instruction */
1412 if (r_type == R_ARM_XPC25)
1414 /* Check for Arm calling Arm function. */
1415 /* FIXME: Should we translate the instruction into a BL
1416 instruction instead ? */
1417 if (sym_flags != STT_ARM_TFUNC)
1418 (*_bfd_error_handler) (_("\
1419 %s: Warning: Arm BLX instruction targets Arm function '%s'."),
1420 bfd_archive_filename (input_bfd),
1421 h ? h->root.root.string : "(local)");
1426 /* Check for Arm calling Thumb function. */
1427 if (sym_flags == STT_ARM_TFUNC)
1429 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1430 input_section, hit_data, sym_sec, rel->r_offset,
1431 signed_addend, value);
1432 return bfd_reloc_ok;
1436 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1437 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1439 /* The old way of doing things. Trearing the addend as a
1440 byte sized field and adding in the pipeline offset. */
1441 value -= (input_section->output_section->vma
1442 + input_section->output_offset);
1443 value -= rel->r_offset;
1446 if (! globals->no_pipeline_knowledge)
1451 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1453 S is the address of the symbol in the relocation.
1454 P is address of the instruction being relocated.
1455 A is the addend (extracted from the instruction) in bytes.
1457 S is held in 'value'.
1458 P is the base address of the section containing the instruction
1459 plus the offset of the reloc into that section, ie:
1460 (input_section->output_section->vma +
1461 input_section->output_offset +
1463 A is the addend, converted into bytes, ie:
1466 Note: None of these operations have knowledge of the pipeline
1467 size of the processor, thus it is up to the assembler to encode
1468 this information into the addend. */
1469 value -= (input_section->output_section->vma
1470 + input_section->output_offset);
1471 value -= rel->r_offset;
1472 value += (signed_addend << howto->size);
1474 /* Previous versions of this code also used to add in the pipeline
1475 offset here. This is wrong because the linker is not supposed
1476 to know about such things, and one day it might change. In order
1477 to support old binaries that need the old behaviour however, so
1478 we attempt to detect which ABI was used to create the reloc. */
1479 if (! globals->no_pipeline_knowledge)
1481 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
1483 i_ehdrp = elf_elfheader (input_bfd);
1485 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1490 signed_addend = value;
1491 signed_addend >>= howto->rightshift;
1493 /* It is not an error for an undefined weak reference to be
1494 out of range. Any program that branches to such a symbol
1495 is going to crash anyway, so there is no point worrying
1496 about getting the destination exactly right. */
1497 if (! h || h->root.type != bfd_link_hash_undefweak)
1499 /* Perform a signed range check. */
1500 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
1501 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1502 return bfd_reloc_overflow;
1506 /* If necessary set the H bit in the BLX instruction. */
1507 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1508 value = (signed_addend & howto->dst_mask)
1509 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1513 value = (signed_addend & howto->dst_mask)
1514 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
1519 if (sym_flags == STT_ARM_TFUNC)
1524 value -= (input_section->output_section->vma
1525 + input_section->output_offset + rel->r_offset);
1530 bfd_put_32 (input_bfd, value, hit_data);
1531 return bfd_reloc_ok;
1535 if ((long) value > 0x7f || (long) value < -0x80)
1536 return bfd_reloc_overflow;
1538 bfd_put_8 (input_bfd, value, hit_data);
1539 return bfd_reloc_ok;
1544 if ((long) value > 0x7fff || (long) value < -0x8000)
1545 return bfd_reloc_overflow;
1547 bfd_put_16 (input_bfd, value, hit_data);
1548 return bfd_reloc_ok;
1551 /* Support ldr and str instruction for the arm */
1552 /* Also thumb b (unconditional branch). ??? Really? */
1555 if ((long) value > 0x7ff || (long) value < -0x800)
1556 return bfd_reloc_overflow;
1558 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1559 bfd_put_32 (input_bfd, value, hit_data);
1560 return bfd_reloc_ok;
1562 case R_ARM_THM_ABS5:
1563 /* Support ldr and str instructions for the thumb. */
1565 /* Need to refetch addend. */
1566 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1567 /* ??? Need to determine shift amount from operand size. */
1568 addend >>= howto->rightshift;
1572 /* ??? Isn't value unsigned? */
1573 if ((long) value > 0x1f || (long) value < -0x10)
1574 return bfd_reloc_overflow;
1576 /* ??? Value needs to be properly shifted into place first. */
1577 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1578 bfd_put_16 (input_bfd, value, hit_data);
1579 return bfd_reloc_ok;
1582 case R_ARM_THM_XPC22:
1584 case R_ARM_THM_PC22:
1585 /* Thumb BL (branch long instruction). */
1588 bfd_boolean overflow = FALSE;
1589 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1590 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
1591 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
1592 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1594 bfd_signed_vma signed_check;
1597 /* Need to refetch the addend and squish the two 11 bit pieces
1600 bfd_vma upper = upper_insn & 0x7ff;
1601 bfd_vma lower = lower_insn & 0x7ff;
1602 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
1603 addend = (upper << 12) | (lower << 1);
1604 signed_addend = addend;
1608 if (r_type == R_ARM_THM_XPC22)
1610 /* Check for Thumb to Thumb call. */
1611 /* FIXME: Should we translate the instruction into a BL
1612 instruction instead ? */
1613 if (sym_flags == STT_ARM_TFUNC)
1614 (*_bfd_error_handler) (_("\
1615 %s: Warning: Thumb BLX instruction targets thumb function '%s'."),
1616 bfd_archive_filename (input_bfd),
1617 h ? h->root.root.string : "(local)");
1622 /* If it is not a call to Thumb, assume call to Arm.
1623 If it is a call relative to a section name, then it is not a
1624 function call at all, but rather a long jump. */
1625 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1627 if (elf32_thumb_to_arm_stub
1628 (info, sym_name, input_bfd, output_bfd, input_section,
1629 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1630 return bfd_reloc_ok;
1632 return bfd_reloc_dangerous;
1636 relocation = value + signed_addend;
1638 relocation -= (input_section->output_section->vma
1639 + input_section->output_offset
1642 if (! globals->no_pipeline_knowledge)
1644 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
1646 i_ehdrp = elf_elfheader (input_bfd);
1648 /* Previous versions of this code also used to add in the pipline
1649 offset here. This is wrong because the linker is not supposed
1650 to know about such things, and one day it might change. In order
1651 to support old binaries that need the old behaviour however, so
1652 we attempt to detect which ABI was used to create the reloc. */
1653 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1654 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1655 || i_ehdrp->e_ident[EI_OSABI] == 0)
1659 check = relocation >> howto->rightshift;
1661 /* If this is a signed value, the rightshift just dropped
1662 leading 1 bits (assuming twos complement). */
1663 if ((bfd_signed_vma) relocation >= 0)
1664 signed_check = check;
1666 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1668 /* Assumes two's complement. */
1669 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1673 if (r_type == R_ARM_THM_XPC22
1674 && ((lower_insn & 0x1800) == 0x0800))
1675 /* For a BLX instruction, make sure that the relocation is rounded up
1676 to a word boundary. This follows the semantics of the instruction
1677 which specifies that bit 1 of the target address will come from bit
1678 1 of the base address. */
1679 relocation = (relocation + 2) & ~ 3;
1681 /* Put RELOCATION back into the insn. */
1682 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1683 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1685 /* Put the relocated value back in the object file: */
1686 bfd_put_16 (input_bfd, upper_insn, hit_data);
1687 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1689 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1693 case R_ARM_THM_PC11:
1694 /* Thumb B (branch) instruction). */
1696 bfd_signed_vma relocation;
1697 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1698 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1699 bfd_signed_vma signed_check;
1702 /* Need to refetch addend. */
1703 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1704 if (addend & ((howto->src_mask + 1) >> 1))
1707 signed_addend &= ~ howto->src_mask;
1708 signed_addend |= addend;
1711 signed_addend = addend;
1712 /* The value in the insn has been right shifted. We need to
1713 undo this, so that we can perform the address calculation
1714 in terms of bytes. */
1715 signed_addend <<= howto->rightshift;
1717 relocation = value + signed_addend;
1719 relocation -= (input_section->output_section->vma
1720 + input_section->output_offset
1723 relocation >>= howto->rightshift;
1724 signed_check = relocation;
1725 relocation &= howto->dst_mask;
1726 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
1728 bfd_put_16 (input_bfd, relocation, hit_data);
1730 /* Assumes two's complement. */
1731 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1732 return bfd_reloc_overflow;
1734 return bfd_reloc_ok;
1737 case R_ARM_GNU_VTINHERIT:
1738 case R_ARM_GNU_VTENTRY:
1739 return bfd_reloc_ok;
1742 return bfd_reloc_notsupported;
1744 case R_ARM_GLOB_DAT:
1745 return bfd_reloc_notsupported;
1747 case R_ARM_JUMP_SLOT:
1748 return bfd_reloc_notsupported;
1750 case R_ARM_RELATIVE:
1751 return bfd_reloc_notsupported;
1754 /* Relocation is relative to the start of the
1755 global offset table. */
1757 BFD_ASSERT (sgot != NULL);
1759 return bfd_reloc_notsupported;
1761 /* If we are addressing a Thumb function, we need to adjust the
1762 address by one, so that attempts to call the function pointer will
1763 correctly interpret it as Thumb code. */
1764 if (sym_flags == STT_ARM_TFUNC)
1767 /* Note that sgot->output_offset is not involved in this
1768 calculation. We always want the start of .got. If we
1769 define _GLOBAL_OFFSET_TABLE in a different way, as is
1770 permitted by the ABI, we might have to change this
1772 value -= sgot->output_section->vma;
1773 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1774 contents, rel->r_offset, value,
1778 /* Use global offset table as symbol value. */
1779 BFD_ASSERT (sgot != NULL);
1782 return bfd_reloc_notsupported;
1784 value = sgot->output_section->vma;
1785 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1786 contents, rel->r_offset, value,
1790 /* Relocation is to the entry for this symbol in the
1791 global offset table. */
1793 return bfd_reloc_notsupported;
1800 off = h->got.offset;
1801 BFD_ASSERT (off != (bfd_vma) -1);
1802 dyn = globals->root.dynamic_sections_created;
1804 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1806 && SYMBOL_REFERENCES_LOCAL (info, h))
1807 || (ELF_ST_VISIBILITY (h->other)
1808 && h->root.type == bfd_link_hash_undefweak))
1810 /* This is actually a static link, or it is a -Bsymbolic link
1811 and the symbol is defined locally. We must initialize this
1812 entry in the global offset table. Since the offset must
1813 always be a multiple of 4, we use the least significant bit
1814 to record whether we have initialized it already.
1816 When doing a dynamic link, we create a .rel.got relocation
1817 entry to initialize the value. This is done in the
1818 finish_dynamic_symbol routine. */
1823 /* If we are addressing a Thumb function, we need to
1824 adjust the address by one, so that attempts to
1825 call the function pointer will correctly
1826 interpret it as Thumb code. */
1827 if (sym_flags == STT_ARM_TFUNC)
1830 bfd_put_32 (output_bfd, value, sgot->contents + off);
1835 value = sgot->output_offset + off;
1841 BFD_ASSERT (local_got_offsets != NULL &&
1842 local_got_offsets[r_symndx] != (bfd_vma) -1);
1844 off = local_got_offsets[r_symndx];
1846 /* The offset must always be a multiple of 4. We use the
1847 least significant bit to record whether we have already
1848 generated the necessary reloc. */
1853 bfd_put_32 (output_bfd, value, sgot->contents + off);
1858 Elf_Internal_Rela outrel;
1861 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1862 BFD_ASSERT (srelgot != NULL);
1864 outrel.r_offset = (sgot->output_section->vma
1865 + sgot->output_offset
1867 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1868 loc = srelgot->contents;
1869 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
1870 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
1873 local_got_offsets[r_symndx] |= 1;
1876 value = sgot->output_offset + off;
1879 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1880 contents, rel->r_offset, value,
1884 return bfd_reloc_notsupported;
1886 case R_ARM_AMP_VCALL9:
1887 return bfd_reloc_notsupported;
1889 case R_ARM_RSBREL32:
1890 return bfd_reloc_notsupported;
1892 case R_ARM_THM_RPC22:
1893 return bfd_reloc_notsupported;
1896 return bfd_reloc_notsupported;
1899 return bfd_reloc_notsupported;
1902 return bfd_reloc_notsupported;
1905 return bfd_reloc_notsupported;
1908 return bfd_reloc_notsupported;
1913 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1915 arm_add_to_rel (abfd, address, howto, increment)
1918 reloc_howto_type * howto;
1919 bfd_signed_vma increment;
1921 bfd_signed_vma addend;
1923 if (howto->type == R_ARM_THM_PC22)
1925 int upper_insn, lower_insn;
1928 upper_insn = bfd_get_16 (abfd, address);
1929 lower_insn = bfd_get_16 (abfd, address + 2);
1930 upper = upper_insn & 0x7ff;
1931 lower = lower_insn & 0x7ff;
1933 addend = (upper << 12) | (lower << 1);
1934 addend += increment;
1937 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1938 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1940 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
1941 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
1947 contents = bfd_get_32 (abfd, address);
1949 /* Get the (signed) value from the instruction. */
1950 addend = contents & howto->src_mask;
1951 if (addend & ((howto->src_mask + 1) >> 1))
1953 bfd_signed_vma mask;
1956 mask &= ~ howto->src_mask;
1960 /* Add in the increment, (which is a byte value). */
1961 switch (howto->type)
1964 addend += increment;
1968 addend <<= howto->size;
1969 addend += increment;
1971 /* Should we check for overflow here ? */
1973 /* Drop any undesired bits. */
1974 addend >>= howto->rightshift;
1978 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1980 bfd_put_32 (abfd, contents, address);
1983 #endif /* USE_REL */
1985 /* Relocate an ARM ELF section. */
1987 elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1988 contents, relocs, local_syms, local_sections)
1990 struct bfd_link_info *info;
1992 asection *input_section;
1994 Elf_Internal_Rela *relocs;
1995 Elf_Internal_Sym *local_syms;
1996 asection **local_sections;
1998 Elf_Internal_Shdr *symtab_hdr;
1999 struct elf_link_hash_entry **sym_hashes;
2000 Elf_Internal_Rela *rel;
2001 Elf_Internal_Rela *relend;
2005 if (info->relocatable)
2009 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2010 sym_hashes = elf_sym_hashes (input_bfd);
2013 relend = relocs + input_section->reloc_count;
2014 for (; rel < relend; rel++)
2017 reloc_howto_type * howto;
2018 unsigned long r_symndx;
2019 Elf_Internal_Sym * sym;
2021 struct elf_link_hash_entry * h;
2023 bfd_reloc_status_type r;
2026 r_symndx = ELF32_R_SYM (rel->r_info);
2027 r_type = ELF32_R_TYPE (rel->r_info);
2029 if ( r_type == R_ARM_GNU_VTENTRY
2030 || r_type == R_ARM_GNU_VTINHERIT)
2033 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
2034 howto = bfd_reloc.howto;
2037 if (info->relocatable)
2039 /* This is a relocatable link. We don't have to change
2040 anything, unless the reloc is against a section symbol,
2041 in which case we have to adjust according to where the
2042 section symbol winds up in the output section. */
2043 if (r_symndx < symtab_hdr->sh_info)
2045 sym = local_syms + r_symndx;
2046 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2048 sec = local_sections[r_symndx];
2049 arm_add_to_rel (input_bfd, contents + rel->r_offset,
2051 (bfd_signed_vma) (sec->output_offset
2060 /* This is a final link. */
2065 if (r_symndx < symtab_hdr->sh_info)
2067 sym = local_syms + r_symndx;
2068 sec = local_sections[r_symndx];
2070 relocation = (sec->output_section->vma
2071 + sec->output_offset
2073 if ((sec->flags & SEC_MERGE)
2074 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2077 bfd_vma addend, value;
2079 if (howto->rightshift)
2081 (*_bfd_error_handler)
2082 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
2083 bfd_archive_filename (input_bfd),
2084 bfd_get_section_name (input_bfd, input_section),
2085 (long) rel->r_offset, howto->name);
2089 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2091 /* Get the (signed) value from the instruction. */
2092 addend = value & howto->src_mask;
2093 if (addend & ((howto->src_mask + 1) >> 1))
2095 bfd_signed_vma mask;
2098 mask &= ~ howto->src_mask;
2103 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
2105 addend += msec->output_section->vma + msec->output_offset;
2106 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
2107 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2110 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2116 bfd_boolean unresolved_reloc;
2118 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2119 r_symndx, symtab_hdr, sym_hashes,
2121 unresolved_reloc, warned);
2123 if (unresolved_reloc || relocation != 0)
2125 /* In these cases, we don't need the relocation value.
2126 We check specially because in some obscure cases
2127 sec->output_section will be NULL. */
2132 case R_ARM_THM_PC22:
2137 (!info->symbolic && h->dynindx != -1)
2138 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
2140 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2141 && ((input_section->flags & SEC_ALLOC) != 0
2142 /* DWARF will emit R_ARM_ABS32 relocations in its
2143 sections against symbols defined externally
2144 in shared libraries. We can't do anything
2146 || ((input_section->flags & SEC_DEBUGGING) != 0
2147 && (h->elf_link_hash_flags
2148 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2158 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
2159 (elf_hash_table (info)->dynamic_sections_created,
2162 || (!info->symbolic && h->dynindx != -1)
2163 || (h->elf_link_hash_flags
2164 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2169 if (unresolved_reloc)
2171 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
2172 bfd_archive_filename (input_bfd),
2174 h->root.root.string,
2175 bfd_get_section_name (input_bfd, input_section));
2182 name = h->root.root.string;
2185 name = (bfd_elf_string_from_elf_section
2186 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2187 if (name == NULL || *name == '\0')
2188 name = bfd_section_name (input_bfd, sec);
2191 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2192 input_section, contents, rel,
2193 relocation, info, sec, name,
2194 (h ? ELF_ST_TYPE (h->type) :
2195 ELF_ST_TYPE (sym->st_info)), h);
2197 if (r != bfd_reloc_ok)
2199 const char * msg = (const char *) 0;
2203 case bfd_reloc_overflow:
2204 /* If the overflowing reloc was to an undefined symbol,
2205 we have already printed one error message and there
2206 is no point complaining again. */
2208 h->root.type != bfd_link_hash_undefined)
2209 && (!((*info->callbacks->reloc_overflow)
2210 (info, name, howto->name, (bfd_vma) 0,
2211 input_bfd, input_section, rel->r_offset))))
2215 case bfd_reloc_undefined:
2216 if (!((*info->callbacks->undefined_symbol)
2217 (info, name, input_bfd, input_section,
2218 rel->r_offset, TRUE)))
2222 case bfd_reloc_outofrange:
2223 msg = _("internal error: out of range error");
2226 case bfd_reloc_notsupported:
2227 msg = _("internal error: unsupported relocation error");
2230 case bfd_reloc_dangerous:
2231 msg = _("internal error: dangerous error");
2235 msg = _("internal error: unknown error");
2239 if (!((*info->callbacks->warning)
2240 (info, msg, name, input_bfd, input_section,
2251 /* Set the right machine number. */
2254 elf32_arm_object_p (abfd)
2259 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
2261 if (mach != bfd_mach_arm_unknown)
2262 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
2264 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
2265 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
2268 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
2273 /* Function to keep ARM specific flags in the ELF header. */
2275 elf32_arm_set_private_flags (abfd, flags)
2279 if (elf_flags_init (abfd)
2280 && elf_elfheader (abfd)->e_flags != flags)
2282 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2284 if (flags & EF_ARM_INTERWORK)
2285 (*_bfd_error_handler) (_("\
2286 Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
2287 bfd_archive_filename (abfd));
2289 _bfd_error_handler (_("\
2290 Warning: Clearing the interworking flag of %s due to outside request"),
2291 bfd_archive_filename (abfd));
2296 elf_elfheader (abfd)->e_flags = flags;
2297 elf_flags_init (abfd) = TRUE;
2303 /* Copy backend specific data from one object module to another. */
2306 elf32_arm_copy_private_bfd_data (ibfd, obfd)
2313 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2314 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2317 in_flags = elf_elfheader (ibfd)->e_flags;
2318 out_flags = elf_elfheader (obfd)->e_flags;
2320 if (elf_flags_init (obfd)
2321 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2322 && in_flags != out_flags)
2324 /* Cannot mix APCS26 and APCS32 code. */
2325 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
2328 /* Cannot mix float APCS and non-float APCS code. */
2329 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
2332 /* If the src and dest have different interworking flags
2333 then turn off the interworking bit. */
2334 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
2336 if (out_flags & EF_ARM_INTERWORK)
2337 _bfd_error_handler (_("\
2338 Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
2339 bfd_get_filename (obfd),
2340 bfd_archive_filename (ibfd));
2342 in_flags &= ~EF_ARM_INTERWORK;
2345 /* Likewise for PIC, though don't warn for this case. */
2346 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2347 in_flags &= ~EF_ARM_PIC;
2350 elf_elfheader (obfd)->e_flags = in_flags;
2351 elf_flags_init (obfd) = TRUE;
2356 /* Merge backend specific data from an object file to the output
2357 object file when linking. */
2360 elf32_arm_merge_private_bfd_data (ibfd, obfd)
2366 bfd_boolean flags_compatible = TRUE;
2369 /* Check if we have the same endianess. */
2370 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2373 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2374 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2377 /* The input BFD must have had its flags initialised. */
2378 /* The following seems bogus to me -- The flags are initialized in
2379 the assembler but I don't think an elf_flags_init field is
2380 written into the object. */
2381 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2383 in_flags = elf_elfheader (ibfd)->e_flags;
2384 out_flags = elf_elfheader (obfd)->e_flags;
2386 if (!elf_flags_init (obfd))
2388 /* If the input is the default architecture and had the default
2389 flags then do not bother setting the flags for the output
2390 architecture, instead allow future merges to do this. If no
2391 future merges ever set these flags then they will retain their
2392 uninitialised values, which surprise surprise, correspond
2393 to the default values. */
2394 if (bfd_get_arch_info (ibfd)->the_default
2395 && elf_elfheader (ibfd)->e_flags == 0)
2398 elf_flags_init (obfd) = TRUE;
2399 elf_elfheader (obfd)->e_flags = in_flags;
2401 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2402 && bfd_get_arch_info (obfd)->the_default)
2403 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2408 /* Determine what should happen if the input ARM architecture
2409 does not match the output ARM architecture. */
2410 if (! bfd_arm_merge_machines (ibfd, obfd))
2413 /* Identical flags must be compatible. */
2414 if (in_flags == out_flags)
2417 /* Check to see if the input BFD actually contains any sections. If
2418 not, its flags may not have been initialised either, but it
2419 cannot actually cause any incompatibility. Do not short-circuit
2420 dynamic objects; their section list may be emptied by
2421 elf_link_add_object_symbols.
2423 Also check to see if there are no code sections in the input.
2424 In this case there is no need to check for code specific flags.
2425 XXX - do we need to worry about floating-point format compatability
2426 in data sections ? */
2427 if (!(ibfd->flags & DYNAMIC))
2429 bfd_boolean null_input_bfd = TRUE;
2430 bfd_boolean only_data_sections = TRUE;
2432 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2434 /* Ignore synthetic glue sections. */
2435 if (strcmp (sec->name, ".glue_7")
2436 && strcmp (sec->name, ".glue_7t"))
2438 if ((bfd_get_section_flags (ibfd, sec)
2439 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
2440 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
2441 only_data_sections = FALSE;
2443 null_input_bfd = FALSE;
2448 if (null_input_bfd || only_data_sections)
2452 /* Complain about various flag mismatches. */
2453 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2455 _bfd_error_handler (_("\
2456 ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"),
2457 bfd_archive_filename (ibfd),
2458 (in_flags & EF_ARM_EABIMASK) >> 24,
2459 bfd_get_filename (obfd),
2460 (out_flags & EF_ARM_EABIMASK) >> 24);
2464 /* Not sure what needs to be checked for EABI versions >= 1. */
2465 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2467 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
2469 _bfd_error_handler (_("\
2470 ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"),
2471 bfd_archive_filename (ibfd),
2472 in_flags & EF_ARM_APCS_26 ? 26 : 32,
2473 bfd_get_filename (obfd),
2474 out_flags & EF_ARM_APCS_26 ? 26 : 32);
2475 flags_compatible = FALSE;
2478 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
2480 if (in_flags & EF_ARM_APCS_FLOAT)
2481 _bfd_error_handler (_("\
2482 ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"),
2483 bfd_archive_filename (ibfd),
2484 bfd_get_filename (obfd));
2486 _bfd_error_handler (_("\
2487 ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"),
2488 bfd_archive_filename (ibfd),
2489 bfd_get_filename (obfd));
2491 flags_compatible = FALSE;
2494 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
2496 if (in_flags & EF_ARM_VFP_FLOAT)
2497 _bfd_error_handler (_("\
2498 ERROR: %s uses VFP instructions, whereas %s does not"),
2499 bfd_archive_filename (ibfd),
2500 bfd_get_filename (obfd));
2502 _bfd_error_handler (_("\
2503 ERROR: %s uses FPA instructions, whereas %s does not"),
2504 bfd_archive_filename (ibfd),
2505 bfd_get_filename (obfd));
2507 flags_compatible = FALSE;
2510 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
2512 if (in_flags & EF_ARM_MAVERICK_FLOAT)
2513 _bfd_error_handler (_("\
2514 ERROR: %s uses Maverick instructions, whereas %s does not"),
2515 bfd_archive_filename (ibfd),
2516 bfd_get_filename (obfd));
2518 _bfd_error_handler (_("\
2519 ERROR: %s does not use Maverick instructions, whereas %s does"),
2520 bfd_archive_filename (ibfd),
2521 bfd_get_filename (obfd));
2523 flags_compatible = FALSE;
2526 #ifdef EF_ARM_SOFT_FLOAT
2527 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
2529 /* We can allow interworking between code that is VFP format
2530 layout, and uses either soft float or integer regs for
2531 passing floating point arguments and results. We already
2532 know that the APCS_FLOAT flags match; similarly for VFP
2534 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
2535 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
2537 if (in_flags & EF_ARM_SOFT_FLOAT)
2538 _bfd_error_handler (_("\
2539 ERROR: %s uses software FP, whereas %s uses hardware FP"),
2540 bfd_archive_filename (ibfd),
2541 bfd_get_filename (obfd));
2543 _bfd_error_handler (_("\
2544 ERROR: %s uses hardware FP, whereas %s uses software FP"),
2545 bfd_archive_filename (ibfd),
2546 bfd_get_filename (obfd));
2548 flags_compatible = FALSE;
2553 /* Interworking mismatch is only a warning. */
2554 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
2556 if (in_flags & EF_ARM_INTERWORK)
2558 _bfd_error_handler (_("\
2559 Warning: %s supports interworking, whereas %s does not"),
2560 bfd_archive_filename (ibfd),
2561 bfd_get_filename (obfd));
2565 _bfd_error_handler (_("\
2566 Warning: %s does not support interworking, whereas %s does"),
2567 bfd_archive_filename (ibfd),
2568 bfd_get_filename (obfd));
2573 return flags_compatible;
2576 /* Display the flags field. */
2579 elf32_arm_print_private_bfd_data (abfd, ptr)
2583 FILE * file = (FILE *) ptr;
2584 unsigned long flags;
2586 BFD_ASSERT (abfd != NULL && ptr != NULL);
2588 /* Print normal ELF private data. */
2589 _bfd_elf_print_private_bfd_data (abfd, ptr);
2591 flags = elf_elfheader (abfd)->e_flags;
2592 /* Ignore init flag - it may not be set, despite the flags field
2593 containing valid data. */
2595 /* xgettext:c-format */
2596 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2598 switch (EF_ARM_EABI_VERSION (flags))
2600 case EF_ARM_EABI_UNKNOWN:
2601 /* The following flag bits are GNU extensions and not part of the
2602 official ARM ELF extended ABI. Hence they are only decoded if
2603 the EABI version is not set. */
2604 if (flags & EF_ARM_INTERWORK)
2605 fprintf (file, _(" [interworking enabled]"));
2607 if (flags & EF_ARM_APCS_26)
2608 fprintf (file, " [APCS-26]");
2610 fprintf (file, " [APCS-32]");
2612 if (flags & EF_ARM_VFP_FLOAT)
2613 fprintf (file, _(" [VFP float format]"));
2614 else if (flags & EF_ARM_MAVERICK_FLOAT)
2615 fprintf (file, _(" [Maverick float format]"));
2617 fprintf (file, _(" [FPA float format]"));
2619 if (flags & EF_ARM_APCS_FLOAT)
2620 fprintf (file, _(" [floats passed in float registers]"));
2622 if (flags & EF_ARM_PIC)
2623 fprintf (file, _(" [position independent]"));
2625 if (flags & EF_ARM_NEW_ABI)
2626 fprintf (file, _(" [new ABI]"));
2628 if (flags & EF_ARM_OLD_ABI)
2629 fprintf (file, _(" [old ABI]"));
2631 if (flags & EF_ARM_SOFT_FLOAT)
2632 fprintf (file, _(" [software FP]"));
2634 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
2635 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
2636 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
2637 | EF_ARM_MAVERICK_FLOAT);
2640 case EF_ARM_EABI_VER1:
2641 fprintf (file, _(" [Version1 EABI]"));
2643 if (flags & EF_ARM_SYMSARESORTED)
2644 fprintf (file, _(" [sorted symbol table]"));
2646 fprintf (file, _(" [unsorted symbol table]"));
2648 flags &= ~ EF_ARM_SYMSARESORTED;
2651 case EF_ARM_EABI_VER2:
2652 fprintf (file, _(" [Version2 EABI]"));
2654 if (flags & EF_ARM_SYMSARESORTED)
2655 fprintf (file, _(" [sorted symbol table]"));
2657 fprintf (file, _(" [unsorted symbol table]"));
2659 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2660 fprintf (file, _(" [dynamic symbols use segment index]"));
2662 if (flags & EF_ARM_MAPSYMSFIRST)
2663 fprintf (file, _(" [mapping symbols precede others]"));
2665 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
2666 | EF_ARM_MAPSYMSFIRST);
2670 fprintf (file, _(" <EABI version unrecognised>"));
2674 flags &= ~ EF_ARM_EABIMASK;
2676 if (flags & EF_ARM_RELEXEC)
2677 fprintf (file, _(" [relocatable executable]"));
2679 if (flags & EF_ARM_HASENTRY)
2680 fprintf (file, _(" [has entry point]"));
2682 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2685 fprintf (file, _("<Unrecognised flag bits set>"));
2693 elf32_arm_get_symbol_type (elf_sym, type)
2694 Elf_Internal_Sym * elf_sym;
2697 switch (ELF_ST_TYPE (elf_sym->st_info))
2700 return ELF_ST_TYPE (elf_sym->st_info);
2703 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2704 This allows us to distinguish between data used by Thumb instructions
2705 and non-data (which is probably code) inside Thumb regions of an
2707 if (type != STT_OBJECT)
2708 return ELF_ST_TYPE (elf_sym->st_info);
2719 elf32_arm_gc_mark_hook (sec, info, rel, h, sym)
2721 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2722 Elf_Internal_Rela *rel;
2723 struct elf_link_hash_entry *h;
2724 Elf_Internal_Sym *sym;
2728 switch (ELF32_R_TYPE (rel->r_info))
2730 case R_ARM_GNU_VTINHERIT:
2731 case R_ARM_GNU_VTENTRY:
2735 switch (h->root.type)
2737 case bfd_link_hash_defined:
2738 case bfd_link_hash_defweak:
2739 return h->root.u.def.section;
2741 case bfd_link_hash_common:
2742 return h->root.u.c.p->section;
2750 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
2755 /* Update the got entry reference counts for the section being removed. */
2758 elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
2759 bfd *abfd ATTRIBUTE_UNUSED;
2760 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2761 asection *sec ATTRIBUTE_UNUSED;
2762 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
2764 Elf_Internal_Shdr *symtab_hdr;
2765 struct elf_link_hash_entry **sym_hashes;
2766 bfd_signed_vma *local_got_refcounts;
2767 const Elf_Internal_Rela *rel, *relend;
2768 unsigned long r_symndx;
2769 struct elf_link_hash_entry *h;
2771 elf_section_data (sec)->local_dynrel = NULL;
2773 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2774 sym_hashes = elf_sym_hashes (abfd);
2775 local_got_refcounts = elf_local_got_refcounts (abfd);
2777 relend = relocs + sec->reloc_count;
2778 for (rel = relocs; rel < relend; rel++)
2779 switch (ELF32_R_TYPE (rel->r_info))
2782 r_symndx = ELF32_R_SYM (rel->r_info);
2783 if (r_symndx >= symtab_hdr->sh_info)
2785 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2786 if (h->got.refcount > 0)
2787 h->got.refcount -= 1;
2789 else if (local_got_refcounts != NULL)
2791 if (local_got_refcounts[r_symndx] > 0)
2792 local_got_refcounts[r_symndx] -= 1;
2800 r_symndx = ELF32_R_SYM (rel->r_info);
2801 if (r_symndx >= symtab_hdr->sh_info)
2803 struct elf32_arm_link_hash_entry *eh;
2804 struct elf32_arm_relocs_copied **pp;
2805 struct elf32_arm_relocs_copied *p;
2807 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2809 if (h->plt.refcount > 0)
2810 h->plt.refcount -= 1;
2812 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
2813 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
2815 eh = (struct elf32_arm_link_hash_entry *) h;
2817 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
2819 if (p->section == sec)
2837 /* Look through the relocs for a section during the first phase. */
2840 elf32_arm_check_relocs (abfd, info, sec, relocs)
2842 struct bfd_link_info *info;
2844 const Elf_Internal_Rela *relocs;
2846 Elf_Internal_Shdr *symtab_hdr;
2847 struct elf_link_hash_entry **sym_hashes;
2848 struct elf_link_hash_entry **sym_hashes_end;
2849 const Elf_Internal_Rela *rel;
2850 const Elf_Internal_Rela *rel_end;
2853 bfd_vma *local_got_offsets;
2854 struct elf32_arm_link_hash_table *htab;
2856 if (info->relocatable)
2859 htab = elf32_arm_hash_table (info);
2862 dynobj = elf_hash_table (info)->dynobj;
2863 local_got_offsets = elf_local_got_offsets (abfd);
2865 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2866 sym_hashes = elf_sym_hashes (abfd);
2867 sym_hashes_end = sym_hashes
2868 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2870 if (!elf_bad_symtab (abfd))
2871 sym_hashes_end -= symtab_hdr->sh_info;
2873 rel_end = relocs + sec->reloc_count;
2874 for (rel = relocs; rel < rel_end; rel++)
2876 struct elf_link_hash_entry *h;
2877 unsigned long r_symndx;
2879 r_symndx = ELF32_R_SYM (rel->r_info);
2880 if (r_symndx < symtab_hdr->sh_info)
2883 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2885 switch (ELF32_R_TYPE (rel->r_info))
2888 /* This symbol requires a global offset table entry. */
2895 bfd_signed_vma *local_got_refcounts;
2897 /* This is a global offset table entry for a local symbol. */
2898 local_got_refcounts = elf_local_got_refcounts (abfd);
2899 if (local_got_refcounts == NULL)
2903 size = symtab_hdr->sh_info;
2904 size *= (sizeof (bfd_signed_vma) + sizeof(char));
2905 local_got_refcounts = ((bfd_signed_vma *)
2906 bfd_zalloc (abfd, size));
2907 if (local_got_refcounts == NULL)
2909 elf_local_got_refcounts (abfd) = local_got_refcounts;
2911 local_got_refcounts[r_symndx] += 1;
2917 if (htab->sgot == NULL)
2919 if (htab->root.dynobj == NULL)
2920 htab->root.dynobj = abfd;
2921 if (!create_got_section (htab->root.dynobj, info))
2932 /* If this reloc is in a read-only section, we might
2933 need a copy reloc. We can't check reliably at this
2934 stage whether the section is read-only, as input
2935 sections have not yet been mapped to output sections.
2936 Tentatively set the flag for now, and correct in
2937 adjust_dynamic_symbol. */
2939 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
2941 /* We may need a .plt entry if the function this reloc
2942 refers to is in a different object. We can't tell for
2943 sure yet, because something later might force the
2945 if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24
2946 || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32)
2947 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2949 /* If we create a PLT entry, this relocation will reference
2950 it, even if it's an ABS32 relocation. */
2951 h->plt.refcount += 1;
2954 /* If we are creating a shared library, and this is a reloc
2955 against a global symbol, or a non PC relative reloc
2956 against a local symbol, then we need to copy the reloc
2957 into the shared library. However, if we are linking with
2958 -Bsymbolic, we do not need to copy a reloc against a
2959 global symbol which is defined in an object we are
2960 including in the link (i.e., DEF_REGULAR is set). At
2961 this point we have not seen all the input files, so it is
2962 possible that DEF_REGULAR is not set now but will be set
2963 later (it is never cleared). We account for that
2964 possibility below by storing information in the
2965 relocs_copied field of the hash table entry. */
2967 && (sec->flags & SEC_ALLOC) != 0
2968 && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2969 && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32
2970 && ELF32_R_TYPE (rel->r_info) != R_ARM_REL32)
2972 && (! info->symbolic
2973 || (h->elf_link_hash_flags
2974 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2976 struct elf32_arm_relocs_copied *p, **head;
2978 /* When creating a shared object, we must copy these
2979 reloc types into the output file. We create a reloc
2980 section in dynobj and make room for this reloc. */
2985 name = (bfd_elf_string_from_elf_section
2987 elf_elfheader (abfd)->e_shstrndx,
2988 elf_section_data (sec)->rel_hdr.sh_name));
2992 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2993 && strcmp (bfd_get_section_name (abfd, sec),
2996 sreloc = bfd_get_section_by_name (dynobj, name);
3001 sreloc = bfd_make_section (dynobj, name);
3002 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3003 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3004 if ((sec->flags & SEC_ALLOC) != 0)
3005 flags |= SEC_ALLOC | SEC_LOAD;
3007 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3008 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
3012 elf_section_data (sec)->sreloc = sreloc;
3015 /* If this is a global symbol, we count the number of
3016 relocations we need for this symbol. */
3019 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
3023 /* Track dynamic relocs needed for local syms too.
3024 We really need local syms available to do this
3028 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3033 head = ((struct elf32_arm_relocs_copied **)
3034 &elf_section_data (s)->local_dynrel);
3038 if (p == NULL || p->section != sec)
3040 bfd_size_type amt = sizeof *p;
3041 p = bfd_alloc (htab->root.dynobj, amt);
3050 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
3051 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
3056 /* This relocation describes the C++ object vtable hierarchy.
3057 Reconstruct it for later use during GC. */
3058 case R_ARM_GNU_VTINHERIT:
3059 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3063 /* This relocation describes which C++ vtable entries are actually
3064 used. Record for later use during GC. */
3065 case R_ARM_GNU_VTENTRY:
3066 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
3075 /* Find the nearest line to a particular section and offset, for error
3076 reporting. This code is a duplicate of the code in elf.c, except
3077 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
3080 elf32_arm_find_nearest_line
3081 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
3086 const char **filename_ptr;
3087 const char **functionname_ptr;
3088 unsigned int *line_ptr;
3091 const char *filename;
3096 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
3097 filename_ptr, functionname_ptr,
3099 &elf_tdata (abfd)->dwarf2_find_line_info))
3102 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
3103 &found, filename_ptr,
3104 functionname_ptr, line_ptr,
3105 &elf_tdata (abfd)->line_info))
3111 if (symbols == NULL)
3118 for (p = symbols; *p != NULL; p++)
3122 q = (elf_symbol_type *) *p;
3124 if (bfd_get_section (&q->symbol) != section)
3127 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
3132 filename = bfd_asymbol_name (&q->symbol);
3137 if (q->symbol.section == section
3138 && q->symbol.value >= low_func
3139 && q->symbol.value <= offset)
3141 func = (asymbol *) q;
3142 low_func = q->symbol.value;
3151 *filename_ptr = filename;
3152 *functionname_ptr = bfd_asymbol_name (func);
3158 /* Adjust a symbol defined by a dynamic object and referenced by a
3159 regular object. The current definition is in some section of the
3160 dynamic object, but we're not including those sections. We have to
3161 change the definition to something the rest of the link can
3165 elf32_arm_adjust_dynamic_symbol (info, h)
3166 struct bfd_link_info * info;
3167 struct elf_link_hash_entry * h;
3171 unsigned int power_of_two;
3173 dynobj = elf_hash_table (info)->dynobj;
3175 /* Make sure we know what is going on here. */
3176 BFD_ASSERT (dynobj != NULL
3177 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
3178 || h->weakdef != NULL
3179 || ((h->elf_link_hash_flags
3180 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3181 && (h->elf_link_hash_flags
3182 & ELF_LINK_HASH_REF_REGULAR) != 0
3183 && (h->elf_link_hash_flags
3184 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
3186 /* If this is a function, put it in the procedure linkage table. We
3187 will fill in the contents of the procedure linkage table later,
3188 when we know the address of the .got section. */
3189 if (h->type == STT_FUNC
3190 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
3192 if (h->plt.refcount <= 0
3193 || SYMBOL_CALLS_LOCAL (info, h)
3194 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3195 && h->root.type == bfd_link_hash_undefweak))
3197 /* This case can occur if we saw a PLT32 reloc in an input
3198 file, but the symbol was never referred to by a dynamic
3199 object, or if all references were garbage collected. In
3200 such a case, we don't actually need to build a procedure
3201 linkage table, and we can just do a PC24 reloc instead. */
3202 h->plt.offset = (bfd_vma) -1;
3203 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3209 /* It's possible that we incorrectly decided a .plt reloc was
3210 needed for an R_ARM_PC24 reloc to a non-function sym in
3211 check_relocs. We can't decide accurately between function and
3212 non-function syms in check-relocs; Objects loaded later in
3213 the link may change h->type. So fix it now. */
3214 h->plt.offset = (bfd_vma) -1;
3216 /* If this is a weak symbol, and there is a real definition, the
3217 processor independent code will have arranged for us to see the
3218 real definition first, and we can just use the same value. */
3219 if (h->weakdef != NULL)
3221 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3222 || h->weakdef->root.type == bfd_link_hash_defweak);
3223 h->root.u.def.section = h->weakdef->root.u.def.section;
3224 h->root.u.def.value = h->weakdef->root.u.def.value;
3228 /* This is a reference to a symbol defined by a dynamic object which
3229 is not a function. */
3231 /* If we are creating a shared library, we must presume that the
3232 only references to the symbol are via the global offset table.
3233 For such cases we need not do anything here; the relocations will
3234 be handled correctly by relocate_section. */
3238 /* We must allocate the symbol in our .dynbss section, which will
3239 become part of the .bss section of the executable. There will be
3240 an entry for this symbol in the .dynsym section. The dynamic
3241 object will contain position independent code, so all references
3242 from the dynamic object to this symbol will go through the global
3243 offset table. The dynamic linker will use the .dynsym entry to
3244 determine the address it must put in the global offset table, so
3245 both the dynamic object and the regular object will refer to the
3246 same memory location for the variable. */
3247 s = bfd_get_section_by_name (dynobj, ".dynbss");
3248 BFD_ASSERT (s != NULL);
3250 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
3251 copy the initial value out of the dynamic object and into the
3252 runtime process image. We need to remember the offset into the
3253 .rel.bss section we are going to use. */
3254 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3258 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
3259 BFD_ASSERT (srel != NULL);
3260 srel->_raw_size += sizeof (Elf32_External_Rel);
3261 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
3264 /* We need to figure out the alignment required for this symbol. I
3265 have no idea how ELF linkers handle this. */
3266 power_of_two = bfd_log2 (h->size);
3267 if (power_of_two > 3)
3270 /* Apply the required alignment. */
3271 s->_raw_size = BFD_ALIGN (s->_raw_size,
3272 (bfd_size_type) (1 << power_of_two));
3273 if (power_of_two > bfd_get_section_alignment (dynobj, s))
3275 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
3279 /* Define the symbol as being at this point in the section. */
3280 h->root.u.def.section = s;
3281 h->root.u.def.value = s->_raw_size;
3283 /* Increment the section size to make room for the symbol. */
3284 s->_raw_size += h->size;
3289 /* Allocate space in .plt, .got and associated reloc sections for
3293 allocate_dynrelocs (h, inf)
3294 struct elf_link_hash_entry *h;
3297 struct bfd_link_info *info;
3298 struct elf32_arm_link_hash_table *htab;
3299 struct elf32_arm_link_hash_entry *eh;
3300 struct elf32_arm_relocs_copied *p;
3302 if (h->root.type == bfd_link_hash_indirect)
3305 if (h->root.type == bfd_link_hash_warning)
3306 /* When warning symbols are created, they **replace** the "real"
3307 entry in the hash table, thus we never get to see the real
3308 symbol in a hash traversal. So look at it now. */
3309 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3311 info = (struct bfd_link_info *) inf;
3312 htab = elf32_arm_hash_table (info);
3314 if (htab->root.dynamic_sections_created
3315 && h->plt.refcount > 0)
3317 /* Make sure this symbol is output as a dynamic symbol.
3318 Undefined weak syms won't yet be marked as dynamic. */
3319 if (h->dynindx == -1
3320 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3322 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3327 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3329 asection *s = htab->splt;
3331 /* If this is the first .plt entry, make room for the special
3333 if (s->_raw_size == 0)
3334 s->_raw_size += PLT_HEADER_SIZE;
3336 h->plt.offset = s->_raw_size;
3338 /* If this symbol is not defined in a regular file, and we are
3339 not generating a shared library, then set the symbol to this
3340 location in the .plt. This is required to make function
3341 pointers compare as equal between the normal executable and
3342 the shared library. */
3344 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3346 h->root.u.def.section = s;
3347 h->root.u.def.value = h->plt.offset;
3350 /* Make room for this entry. */
3351 s->_raw_size += PLT_ENTRY_SIZE;
3353 /* We also need to make an entry in the .got.plt section, which
3354 will be placed in the .got section by the linker script. */
3355 htab->sgotplt->_raw_size += 4;
3357 /* We also need to make an entry in the .rel.plt section. */
3358 htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
3362 h->plt.offset = (bfd_vma) -1;
3363 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3368 h->plt.offset = (bfd_vma) -1;
3369 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3372 if (h->got.refcount > 0)
3377 /* Make sure this symbol is output as a dynamic symbol.
3378 Undefined weak syms won't yet be marked as dynamic. */
3379 if (h->dynindx == -1
3380 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3382 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3387 h->got.offset = s->_raw_size;
3389 dyn = htab->root.dynamic_sections_created;
3390 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3391 || h->root.type != bfd_link_hash_undefweak)
3393 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3394 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
3397 h->got.offset = (bfd_vma) -1;
3399 eh = (struct elf32_arm_link_hash_entry *) h;
3400 if (eh->relocs_copied == NULL)
3403 /* In the shared -Bsymbolic case, discard space allocated for
3404 dynamic pc-relative relocs against symbols which turn out to be
3405 defined in regular objects. For the normal shared case, discard
3406 space for pc-relative relocs that have become local due to symbol
3407 visibility changes. */
3411 /* Discard relocs on undefined weak syms with non-default
3413 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3414 && h->root.type == bfd_link_hash_undefweak)
3415 eh->relocs_copied = NULL;
3419 /* For the non-shared case, discard space for relocs against
3420 symbols which turn out to need copy relocs or are not
3423 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3424 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3425 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3426 || (htab->root.dynamic_sections_created
3427 && (h->root.type == bfd_link_hash_undefweak
3428 || h->root.type == bfd_link_hash_undefined))))
3430 /* Make sure this symbol is output as a dynamic symbol.
3431 Undefined weak syms won't yet be marked as dynamic. */
3432 if (h->dynindx == -1
3433 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3435 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3439 /* If that succeeded, we know we'll be keeping all the
3441 if (h->dynindx != -1)
3445 eh->relocs_copied = NULL;
3450 /* Finally, allocate space. */
3451 for (p = eh->relocs_copied; p != NULL; p = p->next)
3453 asection *sreloc = elf_section_data (p->section)->sreloc;
3454 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
3460 /* Set the sizes of the dynamic sections. */
3463 elf32_arm_size_dynamic_sections (output_bfd, info)
3464 bfd * output_bfd ATTRIBUTE_UNUSED;
3465 struct bfd_link_info * info;
3472 struct elf32_arm_link_hash_table *htab;
3474 htab = elf32_arm_hash_table (info);
3475 dynobj = elf_hash_table (info)->dynobj;
3476 BFD_ASSERT (dynobj != NULL);
3478 if (elf_hash_table (info)->dynamic_sections_created)
3480 /* Set the contents of the .interp section to the interpreter. */
3481 if (info->executable)
3483 s = bfd_get_section_by_name (dynobj, ".interp");
3484 BFD_ASSERT (s != NULL);
3485 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3486 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3490 /* Set up .got offsets for local syms, and space for local dynamic
3492 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3494 bfd_signed_vma *local_got;
3495 bfd_signed_vma *end_local_got;
3496 char *local_tls_type;
3497 bfd_size_type locsymcount;
3498 Elf_Internal_Shdr *symtab_hdr;
3501 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3504 for (s = ibfd->sections; s != NULL; s = s->next)
3506 struct elf32_arm_relocs_copied *p;
3508 for (p = *((struct elf32_arm_relocs_copied **)
3509 &elf_section_data (s)->local_dynrel);
3513 if (!bfd_is_abs_section (p->section)
3514 && bfd_is_abs_section (p->section->output_section))
3516 /* Input section has been discarded, either because
3517 it is a copy of a linkonce section or due to
3518 linker script /DISCARD/, so we'll be discarding
3521 else if (p->count != 0)
3523 srel = elf_section_data (p->section)->sreloc;
3524 srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
3525 if ((p->section->output_section->flags & SEC_READONLY) != 0)
3526 info->flags |= DF_TEXTREL;
3531 local_got = elf_local_got_refcounts (ibfd);
3535 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3536 locsymcount = symtab_hdr->sh_info;
3537 end_local_got = local_got + locsymcount;
3539 srel = htab->srelgot;
3540 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
3544 *local_got = s->_raw_size;
3547 srel->_raw_size += sizeof (Elf32_External_Rel);
3550 *local_got = (bfd_vma) -1;
3554 /* Allocate global sym .plt and .got entries, and space for global
3555 sym dynamic relocs. */
3556 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (PTR) info);
3558 /* The check_relocs and adjust_dynamic_symbol entry points have
3559 determined the sizes of the various dynamic sections. Allocate
3563 for (s = dynobj->sections; s != NULL; s = s->next)
3568 if ((s->flags & SEC_LINKER_CREATED) == 0)
3571 /* It's OK to base decisions on the section name, because none
3572 of the dynobj section names depend upon the input files. */
3573 name = bfd_get_section_name (dynobj, s);
3577 if (strcmp (name, ".plt") == 0)
3579 if (s->_raw_size == 0)
3581 /* Strip this section if we don't need it; see the
3587 /* Remember whether there is a PLT. */
3591 else if (strncmp (name, ".rel", 4) == 0)
3593 if (s->_raw_size == 0)
3595 /* If we don't need this section, strip it from the
3596 output file. This is mostly to handle .rel.bss and
3597 .rel.plt. We must create both sections in
3598 create_dynamic_sections, because they must be created
3599 before the linker maps input sections to output
3600 sections. The linker does that before
3601 adjust_dynamic_symbol is called, and it is that
3602 function which decides whether anything needs to go
3603 into these sections. */
3608 /* Remember whether there are any reloc sections other
3610 if (strcmp (name, ".rel.plt") != 0)
3613 /* We use the reloc_count field as a counter if we need
3614 to copy relocs into the output file. */
3618 else if (strncmp (name, ".got", 4) != 0)
3620 /* It's not one of our sections, so don't allocate space. */
3626 _bfd_strip_section_from_output (info, s);
3630 /* Allocate memory for the section contents. */
3631 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3632 if (s->contents == NULL && s->_raw_size != 0)
3636 if (elf_hash_table (info)->dynamic_sections_created)
3638 /* Add some entries to the .dynamic section. We fill in the
3639 values later, in elf32_arm_finish_dynamic_sections, but we
3640 must add the entries now so that we get the correct size for
3641 the .dynamic section. The DT_DEBUG entry is filled in by the
3642 dynamic linker and used by the debugger. */
3643 #define add_dynamic_entry(TAG, VAL) \
3644 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3648 if (!add_dynamic_entry (DT_DEBUG, 0))
3654 if ( !add_dynamic_entry (DT_PLTGOT, 0)
3655 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3656 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3657 || !add_dynamic_entry (DT_JMPREL, 0))
3663 if ( !add_dynamic_entry (DT_REL, 0)
3664 || !add_dynamic_entry (DT_RELSZ, 0)
3665 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3669 if ((info->flags & DF_TEXTREL) != 0)
3671 if (!add_dynamic_entry (DT_TEXTREL, 0))
3673 info->flags |= DF_TEXTREL;
3676 #undef add_synamic_entry
3681 /* Finish up dynamic symbol handling. We set the contents of various
3682 dynamic sections here. */
3685 elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3687 struct bfd_link_info * info;
3688 struct elf_link_hash_entry * h;
3689 Elf_Internal_Sym * sym;
3693 dynobj = elf_hash_table (info)->dynobj;
3695 if (h->plt.offset != (bfd_vma) -1)
3702 Elf_Internal_Rela rel;
3704 bfd_vma got_displacement;
3706 /* This symbol has an entry in the procedure linkage table. Set
3709 BFD_ASSERT (h->dynindx != -1);
3711 splt = bfd_get_section_by_name (dynobj, ".plt");
3712 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3713 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
3714 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
3716 /* Get the index in the procedure linkage table which
3717 corresponds to this symbol. This is the index of this symbol
3718 in all the symbols for which we are making plt entries. The
3719 first entry in the procedure linkage table is reserved. */
3720 plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
3722 /* Get the offset into the .got table of the entry that
3723 corresponds to this function. Each .got entry is 4 bytes.
3724 The first three are reserved. */
3725 got_offset = (plt_index + 3) * 4;
3727 /* Calculate the displacement between the PLT slot and the
3728 entry in the GOT. */
3729 got_displacement = (sgot->output_section->vma
3730 + sgot->output_offset
3732 - splt->output_section->vma
3733 - splt->output_offset
3737 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
3739 /* Fill in the entry in the procedure linkage table. */
3740 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
3741 splt->contents + h->plt.offset + 0);
3742 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
3743 splt->contents + h->plt.offset + 4);
3744 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
3745 splt->contents + h->plt.offset + 8);
3746 #ifdef FOUR_WORD_PLT
3747 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
3748 splt->contents + h->plt.offset + 12);
3751 /* Fill in the entry in the global offset table. */
3752 bfd_put_32 (output_bfd,
3753 (splt->output_section->vma
3754 + splt->output_offset),
3755 sgot->contents + got_offset);
3757 /* Fill in the entry in the .rel.plt section. */
3758 rel.r_offset = (sgot->output_section->vma
3759 + sgot->output_offset
3761 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
3762 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
3763 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3765 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3767 /* Mark the symbol as undefined, rather than as defined in
3768 the .plt section. Leave the value alone. */
3769 sym->st_shndx = SHN_UNDEF;
3770 /* If the symbol is weak, we do need to clear the value.
3771 Otherwise, the PLT entry would provide a definition for
3772 the symbol even if the symbol wasn't defined anywhere,
3773 and so the symbol would never be NULL. */
3774 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3780 if (h->got.offset != (bfd_vma) -1)
3784 Elf_Internal_Rela rel;
3787 /* This symbol has an entry in the global offset table. Set it
3789 sgot = bfd_get_section_by_name (dynobj, ".got");
3790 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3791 BFD_ASSERT (sgot != NULL && srel != NULL);
3793 rel.r_offset = (sgot->output_section->vma
3794 + sgot->output_offset
3795 + (h->got.offset &~ (bfd_vma) 1));
3797 /* If this is a static link, or it is a -Bsymbolic link and the
3798 symbol is defined locally or was forced to be local because
3799 of a version file, we just want to emit a RELATIVE reloc.
3800 The entry in the global offset table will already have been
3801 initialized in the relocate_section function. */
3803 && SYMBOL_REFERENCES_LOCAL (info, h))
3805 BFD_ASSERT((h->got.offset & 1) != 0);
3806 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3810 BFD_ASSERT((h->got.offset & 1) == 0);
3811 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3812 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3815 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
3816 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3819 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3822 Elf_Internal_Rela rel;
3825 /* This symbol needs a copy reloc. Set it up. */
3826 BFD_ASSERT (h->dynindx != -1
3827 && (h->root.type == bfd_link_hash_defined
3828 || h->root.type == bfd_link_hash_defweak));
3830 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3832 BFD_ASSERT (s != NULL);
3834 rel.r_offset = (h->root.u.def.value
3835 + h->root.u.def.section->output_section->vma
3836 + h->root.u.def.section->output_offset);
3837 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3838 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
3839 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3842 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3843 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3844 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3845 sym->st_shndx = SHN_ABS;
3850 /* Finish up the dynamic sections. */
3853 elf32_arm_finish_dynamic_sections (output_bfd, info)
3855 struct bfd_link_info * info;
3861 dynobj = elf_hash_table (info)->dynobj;
3863 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3864 BFD_ASSERT (sgot != NULL);
3865 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3867 if (elf_hash_table (info)->dynamic_sections_created)
3870 Elf32_External_Dyn *dyncon, *dynconend;
3872 splt = bfd_get_section_by_name (dynobj, ".plt");
3873 BFD_ASSERT (splt != NULL && sdyn != NULL);
3875 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3876 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3878 for (; dyncon < dynconend; dyncon++)
3880 Elf_Internal_Dyn dyn;
3884 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3897 s = bfd_get_section_by_name (output_bfd, name);
3898 BFD_ASSERT (s != NULL);
3899 dyn.d_un.d_ptr = s->vma;
3900 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3904 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3905 BFD_ASSERT (s != NULL);
3906 if (s->_cooked_size != 0)
3907 dyn.d_un.d_val = s->_cooked_size;
3909 dyn.d_un.d_val = s->_raw_size;
3910 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3914 /* My reading of the SVR4 ABI indicates that the
3915 procedure linkage table relocs (DT_JMPREL) should be
3916 included in the overall relocs (DT_REL). This is
3917 what Solaris does. However, UnixWare can not handle
3918 that case. Therefore, we override the DT_RELSZ entry
3919 here to make it not include the JMPREL relocs. Since
3920 the linker script arranges for .rel.plt to follow all
3921 other relocation sections, we don't have to worry
3922 about changing the DT_REL entry. */
3923 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3926 if (s->_cooked_size != 0)
3927 dyn.d_un.d_val -= s->_cooked_size;
3929 dyn.d_un.d_val -= s->_raw_size;
3931 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3934 /* Set the bottom bit of DT_INIT/FINI if the
3935 corresponding function is Thumb. */
3937 name = info->init_function;
3940 name = info->fini_function;
3942 /* If it wasn't set by elf_bfd_final_link
3943 then there is nothing to adjust. */
3944 if (dyn.d_un.d_val != 0)
3946 struct elf_link_hash_entry * eh;
3948 eh = elf_link_hash_lookup (elf_hash_table (info), name,
3949 FALSE, FALSE, TRUE);
3950 if (eh != (struct elf_link_hash_entry *) NULL
3951 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
3953 dyn.d_un.d_val |= 1;
3954 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3961 /* Fill in the first entry in the procedure linkage table. */
3962 if (splt->_raw_size > 0)
3964 bfd_vma got_displacement;
3966 /* Calculate the displacement between the PLT slot and &GOT[0]. */
3967 got_displacement = (sgot->output_section->vma
3968 + sgot->output_offset
3969 - splt->output_section->vma
3970 - splt->output_offset
3973 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
3974 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
3975 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
3976 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
3977 #ifdef FOUR_WORD_PLT
3978 /* The displacement value goes in the otherwise-unused last word of
3979 the second entry. */
3980 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
3982 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
3986 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3987 really seem like the right value. */
3988 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3991 /* Fill in the first three entries in the global offset table. */
3992 if (sgot->_raw_size > 0)
3995 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3997 bfd_put_32 (output_bfd,
3998 sdyn->output_section->vma + sdyn->output_offset,
4000 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4001 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4004 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4010 elf32_arm_post_process_headers (abfd, link_info)
4012 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
4014 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
4016 i_ehdrp = elf_elfheader (abfd);
4018 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
4019 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
4022 static enum elf_reloc_type_class
4023 elf32_arm_reloc_type_class (rela)
4024 const Elf_Internal_Rela *rela;
4026 switch ((int) ELF32_R_TYPE (rela->r_info))
4028 case R_ARM_RELATIVE:
4029 return reloc_class_relative;
4030 case R_ARM_JUMP_SLOT:
4031 return reloc_class_plt;
4033 return reloc_class_copy;
4035 return reloc_class_normal;
4039 static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, Elf_Internal_Shdr *));
4040 static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean));
4042 /* Set the right machine number for an Arm ELF file. */
4045 elf32_arm_section_flags (flags, hdr)
4047 Elf_Internal_Shdr *hdr;
4049 if (hdr->sh_type == SHT_NOTE)
4050 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
4056 elf32_arm_final_write_processing (abfd, linker)
4058 bfd_boolean linker ATTRIBUTE_UNUSED;
4060 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
4063 #define ELF_ARCH bfd_arch_arm
4064 #define ELF_MACHINE_CODE EM_ARM
4065 #ifdef __QNXTARGET__
4066 #define ELF_MAXPAGESIZE 0x1000
4068 #define ELF_MAXPAGESIZE 0x8000
4071 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
4072 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
4073 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
4074 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
4075 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
4076 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
4077 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
4079 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
4080 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
4081 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
4082 #define elf_backend_check_relocs elf32_arm_check_relocs
4083 #define elf_backend_relocate_section elf32_arm_relocate_section
4084 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
4085 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
4086 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
4087 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
4088 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
4089 #define elf_backend_post_process_headers elf32_arm_post_process_headers
4090 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
4091 #define elf_backend_object_p elf32_arm_object_p
4092 #define elf_backend_section_flags elf32_arm_section_flags
4093 #define elf_backend_final_write_processing elf32_arm_final_write_processing
4094 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
4096 #define elf_backend_can_refcount 1
4097 #define elf_backend_can_gc_sections 1
4098 #define elf_backend_plt_readonly 1
4099 #define elf_backend_want_got_plt 1
4100 #define elf_backend_want_plt_sym 0
4102 #define elf_backend_rela_normal 1
4105 #define elf_backend_got_header_size 12
4107 #include "elf32-target.h"