1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 typedef unsigned long int insn32;
25 typedef unsigned short int insn16;
27 static bfd_boolean elf32_arm_set_private_flags
28 PARAMS ((bfd *, flagword));
29 static bfd_boolean elf32_arm_copy_private_bfd_data
30 PARAMS ((bfd *, bfd *));
31 static bfd_boolean elf32_arm_merge_private_bfd_data
32 PARAMS ((bfd *, bfd *));
33 static bfd_boolean elf32_arm_print_private_bfd_data
34 PARAMS ((bfd *, PTR));
35 static int elf32_arm_get_symbol_type
36 PARAMS (( Elf_Internal_Sym *, int));
37 static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
39 static bfd_reloc_status_type elf32_arm_final_link_relocate
40 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
41 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
42 const char *, int, struct elf_link_hash_entry *));
43 static insn32 insert_thumb_branch
44 PARAMS ((insn32, int));
45 static struct elf_link_hash_entry *find_thumb_glue
46 PARAMS ((struct bfd_link_info *, const char *, bfd *));
47 static struct elf_link_hash_entry *find_arm_glue
48 PARAMS ((struct bfd_link_info *, const char *, bfd *));
49 static void elf32_arm_post_process_headers
50 PARAMS ((bfd *, struct bfd_link_info *));
51 static int elf32_arm_to_thumb_stub
52 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
53 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
54 static int elf32_thumb_to_arm_stub
55 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
56 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
57 static bfd_boolean elf32_arm_relocate_section
58 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
59 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
60 static asection * elf32_arm_gc_mark_hook
61 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
62 struct elf_link_hash_entry *, Elf_Internal_Sym *));
63 static bfd_boolean elf32_arm_gc_sweep_hook
64 PARAMS ((bfd *, struct bfd_link_info *, asection *,
65 const Elf_Internal_Rela *));
66 static bfd_boolean elf32_arm_check_relocs
67 PARAMS ((bfd *, struct bfd_link_info *, asection *,
68 const Elf_Internal_Rela *));
69 static bfd_boolean elf32_arm_find_nearest_line
70 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
71 const char **, unsigned int *));
72 static bfd_boolean elf32_arm_adjust_dynamic_symbol
73 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
74 static bfd_boolean elf32_arm_size_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76 static bfd_boolean elf32_arm_finish_dynamic_symbol
77 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
79 static bfd_boolean elf32_arm_finish_dynamic_sections
80 PARAMS ((bfd *, struct bfd_link_info *));
81 static struct bfd_hash_entry * elf32_arm_link_hash_newfunc
82 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
84 static void arm_add_to_rel
85 PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma));
87 static bfd_boolean allocate_dynrelocs
88 PARAMS ((struct elf_link_hash_entry *h, PTR inf));
89 static bfd_boolean create_got_section
90 PARAMS ((bfd * dynobj, struct bfd_link_info * info));
91 static bfd_boolean elf32_arm_create_dynamic_sections
92 PARAMS ((bfd * dynobj, struct bfd_link_info * info));
93 static enum elf_reloc_type_class elf32_arm_reloc_type_class
94 PARAMS ((const Elf_Internal_Rela *));
95 static bfd_boolean elf32_arm_object_p
98 #ifndef ELFARM_NABI_C_INCLUDED
99 static void record_arm_to_thumb_glue
100 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
101 static void record_thumb_to_arm_glue
102 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
103 bfd_boolean bfd_elf32_arm_allocate_interworking_sections
104 PARAMS ((struct bfd_link_info *));
105 bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
106 PARAMS ((bfd *, struct bfd_link_info *));
107 bfd_boolean bfd_elf32_arm_process_before_allocation
108 PARAMS ((bfd *, struct bfd_link_info *, int));
112 #define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
114 /* The linker script knows the section names for placement.
115 The entry_names are used to do simple name mangling on the stubs.
116 Given a function name, and its type, the stub can be found. The
117 name can be changed. The only requirement is the %s be present. */
118 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
119 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
121 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
122 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
124 /* The name of the dynamic interpreter. This is put in the .interp
126 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
130 /* The size in bytes of the special first entry in the procedure
132 #define PLT_HEADER_SIZE 16
134 /* The size in bytes of an entry in the procedure linkage table. */
135 #define PLT_ENTRY_SIZE 16
137 /* The first entry in a procedure linkage table looks like
138 this. It is set up so that any shared library function that is
139 called before the relocation has been set up calls the dynamic
141 static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
143 0xe52de004, /* str lr, [sp, #-4]! */
144 0xe59fe010, /* ldr lr, [pc, #16] */
145 0xe08fe00e, /* add lr, pc, lr */
146 0xe5bef008, /* ldr pc, [lr, #8]! */
149 /* Subsequent entries in a procedure linkage table look like
151 static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
153 0xe28fc600, /* add ip, pc, #NN */
154 0xe28cca00, /* add ip, ip, #NN */
155 0xe5bcf000, /* ldr pc, [ip, #NN]! */
156 0x00000000, /* unused */
161 /* The size in bytes of the special first entry in the procedure
163 #define PLT_HEADER_SIZE 20
165 /* The size in bytes of an entry in the procedure linkage table. */
166 #define PLT_ENTRY_SIZE 12
168 /* The first entry in a procedure linkage table looks like
169 this. It is set up so that any shared library function that is
170 called before the relocation has been set up calls the dynamic
172 static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
174 0xe52de004, /* str lr, [sp, #-4]! */
175 0xe59fe004, /* ldr lr, [pc, #4] */
176 0xe08fe00e, /* add lr, pc, lr */
177 0xe5bef008, /* ldr pc, [lr, #8]! */
178 0x00000000, /* &GOT[0] - . */
181 /* Subsequent entries in a procedure linkage table look like
183 static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
185 0xe28fc600, /* add ip, pc, #0xNN00000 */
186 0xe28cca00, /* add ip, ip, #0xNN000 */
187 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
192 /* The ARM linker needs to keep track of the number of relocs that it
193 decides to copy in check_relocs for each symbol. This is so that
194 it can discard PC relative relocs if it doesn't need them when
195 linking with -Bsymbolic. We store the information in a field
196 extending the regular ELF linker hash table. */
198 /* This structure keeps track of the number of PC relative relocs we
199 have copied for a given symbol. */
200 struct elf32_arm_relocs_copied
203 struct elf32_arm_relocs_copied * next;
204 /* A section in dynobj. */
206 /* Number of relocs copied in this section. */
210 /* Arm ELF linker hash entry. */
211 struct elf32_arm_link_hash_entry
213 struct elf_link_hash_entry root;
215 /* Number of PC relative relocs copied for this symbol. */
216 struct elf32_arm_relocs_copied * relocs_copied;
219 /* Traverse an arm ELF linker hash table. */
220 #define elf32_arm_link_hash_traverse(table, func, info) \
221 (elf_link_hash_traverse \
223 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
226 /* Get the ARM elf linker hash table from a link_info structure. */
227 #define elf32_arm_hash_table(info) \
228 ((struct elf32_arm_link_hash_table *) ((info)->hash))
230 /* ARM ELF linker hash table. */
231 struct elf32_arm_link_hash_table
233 /* The main hash table. */
234 struct elf_link_hash_table root;
236 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
237 bfd_size_type thumb_glue_size;
239 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
240 bfd_size_type arm_glue_size;
242 /* An arbitrary input BFD chosen to hold the glue sections. */
243 bfd * bfd_of_glue_owner;
245 /* A boolean indicating whether knowledge of the ARM's pipeline
246 length should be applied by the linker. */
247 int no_pipeline_knowledge;
249 /* Short-cuts to get to dynamic linker sections. */
258 /* Small local sym to section mapping cache. */
259 struct sym_sec_cache sym_sec;
262 /* Create an entry in an ARM ELF linker hash table. */
264 static struct bfd_hash_entry *
265 elf32_arm_link_hash_newfunc (entry, table, string)
266 struct bfd_hash_entry * entry;
267 struct bfd_hash_table * table;
270 struct elf32_arm_link_hash_entry * ret =
271 (struct elf32_arm_link_hash_entry *) entry;
273 /* Allocate the structure if it has not already been allocated by a
275 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
276 ret = ((struct elf32_arm_link_hash_entry *)
277 bfd_hash_allocate (table,
278 sizeof (struct elf32_arm_link_hash_entry)));
279 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
280 return (struct bfd_hash_entry *) ret;
282 /* Call the allocation method of the superclass. */
283 ret = ((struct elf32_arm_link_hash_entry *)
284 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
286 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
287 ret->relocs_copied = NULL;
289 return (struct bfd_hash_entry *) ret;
292 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
293 shortcuts to them in our hash table. */
296 create_got_section (dynobj, info)
298 struct bfd_link_info *info;
300 struct elf32_arm_link_hash_table *htab;
302 if (! _bfd_elf_create_got_section (dynobj, info))
305 htab = elf32_arm_hash_table (info);
306 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
307 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
308 if (!htab->sgot || !htab->sgotplt)
311 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
312 if (htab->srelgot == NULL
313 || ! bfd_set_section_flags (dynobj, htab->srelgot,
314 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
315 | SEC_IN_MEMORY | SEC_LINKER_CREATED
317 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
322 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
323 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
327 elf32_arm_create_dynamic_sections (dynobj, info)
329 struct bfd_link_info *info;
331 struct elf32_arm_link_hash_table *htab;
333 htab = elf32_arm_hash_table (info);
334 if (!htab->sgot && !create_got_section (dynobj, info))
337 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
340 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
341 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
342 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
344 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
346 if (!htab->splt || !htab->srelplt || !htab->sdynbss
347 || (!info->shared && !htab->srelbss))
353 /* Copy the extra info we tack onto an elf_link_hash_entry. */
356 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
357 struct elf_link_hash_entry *dir,
358 struct elf_link_hash_entry *ind)
360 struct elf32_arm_link_hash_entry *edir, *eind;
362 edir = (struct elf32_arm_link_hash_entry *) dir;
363 eind = (struct elf32_arm_link_hash_entry *) ind;
365 if (eind->relocs_copied != NULL)
367 if (edir->relocs_copied != NULL)
369 struct elf32_arm_relocs_copied **pp;
370 struct elf32_arm_relocs_copied *p;
372 if (ind->root.type == bfd_link_hash_indirect)
375 /* Add reloc counts against the weak sym to the strong sym
376 list. Merge any entries against the same section. */
377 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
379 struct elf32_arm_relocs_copied *q;
381 for (q = edir->relocs_copied; q != NULL; q = q->next)
382 if (q->section == p->section)
384 q->count += p->count;
391 *pp = edir->relocs_copied;
394 edir->relocs_copied = eind->relocs_copied;
395 eind->relocs_copied = NULL;
398 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
401 /* Create an ARM elf linker hash table. */
403 static struct bfd_link_hash_table *
404 elf32_arm_link_hash_table_create (abfd)
407 struct elf32_arm_link_hash_table *ret;
408 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
410 ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt);
411 if (ret == (struct elf32_arm_link_hash_table *) NULL)
414 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
415 elf32_arm_link_hash_newfunc))
428 ret->thumb_glue_size = 0;
429 ret->arm_glue_size = 0;
430 ret->bfd_of_glue_owner = NULL;
431 ret->no_pipeline_knowledge = 0;
432 ret->sym_sec.abfd = NULL;
434 return &ret->root.root;
437 /* Locate the Thumb encoded calling stub for NAME. */
439 static struct elf_link_hash_entry *
440 find_thumb_glue (link_info, name, input_bfd)
441 struct bfd_link_info *link_info;
446 struct elf_link_hash_entry *hash;
447 struct elf32_arm_link_hash_table *hash_table;
449 /* We need a pointer to the armelf specific hash table. */
450 hash_table = elf32_arm_hash_table (link_info);
452 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
453 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
455 BFD_ASSERT (tmp_name);
457 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
459 hash = elf_link_hash_lookup
460 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
463 /* xgettext:c-format */
464 (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"),
465 bfd_archive_filename (input_bfd), tmp_name, name);
472 /* Locate the ARM encoded calling stub for NAME. */
474 static struct elf_link_hash_entry *
475 find_arm_glue (link_info, name, input_bfd)
476 struct bfd_link_info *link_info;
481 struct elf_link_hash_entry *myh;
482 struct elf32_arm_link_hash_table *hash_table;
484 /* We need a pointer to the elfarm specific hash table. */
485 hash_table = elf32_arm_hash_table (link_info);
487 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
488 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
490 BFD_ASSERT (tmp_name);
492 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
494 myh = elf_link_hash_lookup
495 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
498 /* xgettext:c-format */
499 (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"),
500 bfd_archive_filename (input_bfd), tmp_name, name);
514 .word func @ behave as if you saw a ARM_32 reloc. */
516 #define ARM2THUMB_GLUE_SIZE 12
517 static const insn32 a2t1_ldr_insn = 0xe59fc000;
518 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
519 static const insn32 a2t3_func_addr_insn = 0x00000001;
521 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
525 __func_from_thumb: __func_from_thumb:
527 nop ldr r6, __func_addr
529 __func_change_to_arm: bx r6
531 __func_back_to_thumb:
537 #define THUMB2ARM_GLUE_SIZE 8
538 static const insn16 t2a1_bx_pc_insn = 0x4778;
539 static const insn16 t2a2_noop_insn = 0x46c0;
540 static const insn32 t2a3_b_insn = 0xea000000;
542 #ifndef ELFARM_NABI_C_INCLUDED
544 bfd_elf32_arm_allocate_interworking_sections (info)
545 struct bfd_link_info * info;
549 struct elf32_arm_link_hash_table * globals;
551 globals = elf32_arm_hash_table (info);
553 BFD_ASSERT (globals != NULL);
555 if (globals->arm_glue_size != 0)
557 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
559 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
560 ARM2THUMB_GLUE_SECTION_NAME);
562 BFD_ASSERT (s != NULL);
564 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
565 globals->arm_glue_size);
567 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
571 if (globals->thumb_glue_size != 0)
573 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
575 s = bfd_get_section_by_name
576 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
578 BFD_ASSERT (s != NULL);
580 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
581 globals->thumb_glue_size);
583 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
591 record_arm_to_thumb_glue (link_info, h)
592 struct bfd_link_info * link_info;
593 struct elf_link_hash_entry * h;
595 const char * name = h->root.root.string;
598 struct elf_link_hash_entry * myh;
599 struct bfd_link_hash_entry * bh;
600 struct elf32_arm_link_hash_table * globals;
603 globals = elf32_arm_hash_table (link_info);
605 BFD_ASSERT (globals != NULL);
606 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
608 s = bfd_get_section_by_name
609 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
611 BFD_ASSERT (s != NULL);
613 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
614 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
616 BFD_ASSERT (tmp_name);
618 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
620 myh = elf_link_hash_lookup
621 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
625 /* We've already seen this guy. */
630 /* The only trick here is using hash_table->arm_glue_size as the value. Even
631 though the section isn't allocated yet, this is where we will be putting
634 val = globals->arm_glue_size + 1;
635 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
636 tmp_name, BSF_GLOBAL, s, val,
637 NULL, TRUE, FALSE, &bh);
641 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
647 record_thumb_to_arm_glue (link_info, h)
648 struct bfd_link_info *link_info;
649 struct elf_link_hash_entry *h;
651 const char *name = h->root.root.string;
654 struct elf_link_hash_entry *myh;
655 struct bfd_link_hash_entry *bh;
656 struct elf32_arm_link_hash_table *hash_table;
660 hash_table = elf32_arm_hash_table (link_info);
662 BFD_ASSERT (hash_table != NULL);
663 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
665 s = bfd_get_section_by_name
666 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
668 BFD_ASSERT (s != NULL);
670 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
671 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
673 BFD_ASSERT (tmp_name);
675 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
677 myh = elf_link_hash_lookup
678 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
682 /* We've already seen this guy. */
688 val = hash_table->thumb_glue_size + 1;
689 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
690 tmp_name, BSF_GLOBAL, s, val,
691 NULL, TRUE, FALSE, &bh);
693 /* If we mark it 'Thumb', the disassembler will do a better job. */
694 myh = (struct elf_link_hash_entry *) bh;
695 bind = ELF_ST_BIND (myh->type);
696 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
700 #define CHANGE_TO_ARM "__%s_change_to_arm"
701 #define BACK_FROM_ARM "__%s_back_from_arm"
703 /* Allocate another symbol to mark where we switch to Arm mode. */
704 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
705 + strlen (CHANGE_TO_ARM) + 1);
707 BFD_ASSERT (tmp_name);
709 sprintf (tmp_name, CHANGE_TO_ARM, name);
712 val = hash_table->thumb_glue_size + 4,
713 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
714 tmp_name, BSF_LOCAL, s, val,
715 NULL, TRUE, FALSE, &bh);
719 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
724 /* Add the glue sections to ABFD. This function is called from the
725 linker scripts in ld/emultempl/{armelf}.em. */
728 bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info)
730 struct bfd_link_info *info;
735 /* If we are only performing a partial
736 link do not bother adding the glue. */
737 if (info->relocatable)
740 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
744 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
745 will prevent elf_link_input_bfd() from processing the contents
747 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
749 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
752 || !bfd_set_section_flags (abfd, sec, flags)
753 || !bfd_set_section_alignment (abfd, sec, 2))
756 /* Set the gc mark to prevent the section from being removed by garbage
757 collection, despite the fact that no relocs refer to this section. */
761 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
765 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
767 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
770 || !bfd_set_section_flags (abfd, sec, flags)
771 || !bfd_set_section_alignment (abfd, sec, 2))
780 /* Select a BFD to be used to hold the sections used by the glue code.
781 This function is called from the linker scripts in ld/emultempl/
785 bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
787 struct bfd_link_info *info;
789 struct elf32_arm_link_hash_table *globals;
791 /* If we are only performing a partial link
792 do not bother getting a bfd to hold the glue. */
793 if (info->relocatable)
796 globals = elf32_arm_hash_table (info);
798 BFD_ASSERT (globals != NULL);
800 if (globals->bfd_of_glue_owner != NULL)
803 /* Save the bfd for later use. */
804 globals->bfd_of_glue_owner = abfd;
810 bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
812 struct bfd_link_info *link_info;
813 int no_pipeline_knowledge;
815 Elf_Internal_Shdr *symtab_hdr;
816 Elf_Internal_Rela *internal_relocs = NULL;
817 Elf_Internal_Rela *irel, *irelend;
818 bfd_byte *contents = NULL;
821 struct elf32_arm_link_hash_table *globals;
823 /* If we are only performing a partial link do not bother
824 to construct any glue. */
825 if (link_info->relocatable)
828 /* Here we have a bfd that is to be included on the link. We have a hook
829 to do reloc rummaging, before section sizes are nailed down. */
830 globals = elf32_arm_hash_table (link_info);
832 BFD_ASSERT (globals != NULL);
833 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
835 globals->no_pipeline_knowledge = no_pipeline_knowledge;
837 /* Rummage around all the relocs and map the glue vectors. */
838 sec = abfd->sections;
843 for (; sec != NULL; sec = sec->next)
845 if (sec->reloc_count == 0)
848 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
850 /* Load the relocs. */
852 = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL,
853 (Elf_Internal_Rela *) NULL, FALSE);
855 if (internal_relocs == NULL)
858 irelend = internal_relocs + sec->reloc_count;
859 for (irel = internal_relocs; irel < irelend; irel++)
862 unsigned long r_index;
864 struct elf_link_hash_entry *h;
866 r_type = ELF32_R_TYPE (irel->r_info);
867 r_index = ELF32_R_SYM (irel->r_info);
869 /* These are the only relocation types we care about. */
870 if ( r_type != R_ARM_PC24
871 && r_type != R_ARM_THM_PC22)
874 /* Get the section contents if we haven't done so already. */
875 if (contents == NULL)
877 /* Get cached copy if it exists. */
878 if (elf_section_data (sec)->this_hdr.contents != NULL)
879 contents = elf_section_data (sec)->this_hdr.contents;
882 /* Go get them off disk. */
883 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
884 if (contents == NULL)
887 if (!bfd_get_section_contents (abfd, sec, contents,
888 (file_ptr) 0, sec->_raw_size))
893 /* If the relocation is not against a symbol it cannot concern us. */
896 /* We don't care about local symbols. */
897 if (r_index < symtab_hdr->sh_info)
900 /* This is an external symbol. */
901 r_index -= symtab_hdr->sh_info;
902 h = (struct elf_link_hash_entry *)
903 elf_sym_hashes (abfd)[r_index];
905 /* If the relocation is against a static symbol it must be within
906 the current section and so cannot be a cross ARM/Thumb relocation. */
913 /* This one is a call from arm code. We need to look up
914 the target of the call. If it is a thumb target, we
916 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
917 record_arm_to_thumb_glue (link_info, h);
921 /* This one is a call from thumb code. We look
922 up the target of the call. If it is not a thumb
923 target, we insert glue. */
924 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
925 record_thumb_to_arm_glue (link_info, h);
934 && elf_section_data (sec)->this_hdr.contents != contents)
938 if (internal_relocs != NULL
939 && elf_section_data (sec)->relocs != internal_relocs)
940 free (internal_relocs);
941 internal_relocs = NULL;
948 && elf_section_data (sec)->this_hdr.contents != contents)
950 if (internal_relocs != NULL
951 && elf_section_data (sec)->relocs != internal_relocs)
952 free (internal_relocs);
958 /* The thumb form of a long branch is a bit finicky, because the offset
959 encoding is split over two fields, each in it's own instruction. They
960 can occur in any order. So given a thumb form of long branch, and an
961 offset, insert the offset into the thumb branch and return finished
964 It takes two thumb instructions to encode the target address. Each has
965 11 bits to invest. The upper 11 bits are stored in one (identified by
966 H-0.. see below), the lower 11 bits are stored in the other (identified
969 Combine together and shifted left by 1 (it's a half word address) and
973 H-0, upper address-0 = 000
975 H-1, lower address-0 = 800
977 They can be ordered either way, but the arm tools I've seen always put
978 the lower one first. It probably doesn't matter. krk@cygnus.com
980 XXX: Actually the order does matter. The second instruction (H-1)
981 moves the computed address into the PC, so it must be the second one
982 in the sequence. The problem, however is that whilst little endian code
983 stores the instructions in HI then LOW order, big endian code does the
984 reverse. nickc@cygnus.com. */
986 #define LOW_HI_ORDER 0xF800F000
987 #define HI_LOW_ORDER 0xF000F800
990 insert_thumb_branch (br_insn, rel_off)
994 unsigned int low_bits;
995 unsigned int high_bits;
997 BFD_ASSERT ((rel_off & 1) != 1);
999 rel_off >>= 1; /* Half word aligned address. */
1000 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
1001 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
1003 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
1004 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
1005 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
1006 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
1008 /* FIXME: abort is probably not the right call. krk@cygnus.com */
1009 abort (); /* error - not a valid branch instruction form. */
1014 /* Thumb code calling an ARM function. */
1017 elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
1018 hit_data, sym_sec, offset, addend, val)
1019 struct bfd_link_info * info;
1023 asection * input_section;
1024 bfd_byte * hit_data;
1027 bfd_signed_vma addend;
1032 unsigned long int tmp;
1033 long int ret_offset;
1034 struct elf_link_hash_entry * myh;
1035 struct elf32_arm_link_hash_table * globals;
1037 myh = find_thumb_glue (info, name, input_bfd);
1041 globals = elf32_arm_hash_table (info);
1043 BFD_ASSERT (globals != NULL);
1044 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1046 my_offset = myh->root.u.def.value;
1048 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1049 THUMB2ARM_GLUE_SECTION_NAME);
1051 BFD_ASSERT (s != NULL);
1052 BFD_ASSERT (s->contents != NULL);
1053 BFD_ASSERT (s->output_section != NULL);
1055 if ((my_offset & 0x01) == 0x01)
1058 && sym_sec->owner != NULL
1059 && !INTERWORK_FLAG (sym_sec->owner))
1061 (*_bfd_error_handler)
1062 (_("%s(%s): warning: interworking not enabled."),
1063 bfd_archive_filename (sym_sec->owner), name);
1064 (*_bfd_error_handler)
1065 (_(" first occurrence: %s: thumb call to arm"),
1066 bfd_archive_filename (input_bfd));
1072 myh->root.u.def.value = my_offset;
1074 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
1075 s->contents + my_offset);
1077 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
1078 s->contents + my_offset + 2);
1081 /* Address of destination of the stub. */
1082 ((bfd_signed_vma) val)
1084 /* Offset from the start of the current section to the start of the stubs. */
1086 /* Offset of the start of this stub from the start of the stubs. */
1088 /* Address of the start of the current section. */
1089 + s->output_section->vma)
1090 /* The branch instruction is 4 bytes into the stub. */
1092 /* ARM branches work from the pc of the instruction + 8. */
1095 bfd_put_32 (output_bfd,
1096 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
1097 s->contents + my_offset + 4);
1100 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
1102 /* Now go back and fix up the original BL insn to point to here. */
1104 /* Address of where the stub is located. */
1105 (s->output_section->vma + s->output_offset + my_offset)
1106 /* Address of where the BL is located. */
1107 - (input_section->output_section->vma + input_section->output_offset + offset)
1108 /* Addend in the relocation. */
1110 /* Biassing for PC-relative addressing. */
1113 tmp = bfd_get_32 (input_bfd, hit_data
1114 - input_section->vma);
1116 bfd_put_32 (output_bfd,
1117 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
1118 hit_data - input_section->vma);
1123 /* Arm code calling a Thumb function. */
1126 elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
1127 hit_data, sym_sec, offset, addend, val)
1128 struct bfd_link_info * info;
1132 asection * input_section;
1133 bfd_byte * hit_data;
1136 bfd_signed_vma addend;
1139 unsigned long int tmp;
1142 long int ret_offset;
1143 struct elf_link_hash_entry * myh;
1144 struct elf32_arm_link_hash_table * globals;
1146 myh = find_arm_glue (info, name, input_bfd);
1150 globals = elf32_arm_hash_table (info);
1152 BFD_ASSERT (globals != NULL);
1153 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1155 my_offset = myh->root.u.def.value;
1156 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1157 ARM2THUMB_GLUE_SECTION_NAME);
1158 BFD_ASSERT (s != NULL);
1159 BFD_ASSERT (s->contents != NULL);
1160 BFD_ASSERT (s->output_section != NULL);
1162 if ((my_offset & 0x01) == 0x01)
1165 && sym_sec->owner != NULL
1166 && !INTERWORK_FLAG (sym_sec->owner))
1168 (*_bfd_error_handler)
1169 (_("%s(%s): warning: interworking not enabled."),
1170 bfd_archive_filename (sym_sec->owner), name);
1171 (*_bfd_error_handler)
1172 (_(" first occurrence: %s: arm call to thumb"),
1173 bfd_archive_filename (input_bfd));
1177 myh->root.u.def.value = my_offset;
1179 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
1180 s->contents + my_offset);
1182 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
1183 s->contents + my_offset + 4);
1185 /* It's a thumb address. Add the low order bit. */
1186 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
1187 s->contents + my_offset + 8);
1190 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1192 tmp = bfd_get_32 (input_bfd, hit_data);
1193 tmp = tmp & 0xFF000000;
1195 /* Somehow these are both 4 too far, so subtract 8. */
1196 ret_offset = (s->output_offset
1198 + s->output_section->vma
1199 - (input_section->output_offset
1200 + input_section->output_section->vma
1204 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
1206 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
1211 /* This is the condition under which elf32_arm_finish_dynamic_symbol
1212 will be called from elflink.h. If elflink.h doesn't call our
1213 finish_dynamic_symbol routine, we'll need to do something about
1214 initializing any .plt and .got entries in elf32_arm_relocate_section
1215 and elf32_arm_final_link_relocate. */
1216 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1219 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1220 && ((H)->dynindx != -1 \
1221 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1223 /* Perform a relocation as part of a final link. */
1225 static bfd_reloc_status_type
1226 elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1227 input_section, contents, rel, value,
1228 info, sym_sec, sym_name, sym_flags, h)
1229 reloc_howto_type * howto;
1232 asection * input_section;
1233 bfd_byte * contents;
1234 Elf_Internal_Rela * rel;
1236 struct bfd_link_info * info;
1238 const char * sym_name;
1240 struct elf_link_hash_entry * h;
1242 unsigned long r_type = howto->type;
1243 unsigned long r_symndx;
1244 bfd_byte * hit_data = contents + rel->r_offset;
1245 bfd * dynobj = NULL;
1246 Elf_Internal_Shdr * symtab_hdr;
1247 struct elf_link_hash_entry ** sym_hashes;
1248 bfd_vma * local_got_offsets;
1249 asection * sgot = NULL;
1250 asection * splt = NULL;
1251 asection * sreloc = NULL;
1253 bfd_signed_vma signed_addend;
1254 struct elf32_arm_link_hash_table * globals;
1256 /* If the start address has been set, then set the EF_ARM_HASENTRY
1257 flag. Setting this more than once is redundant, but the cost is
1258 not too high, and it keeps the code simple.
1260 The test is done here, rather than somewhere else, because the
1261 start address is only set just before the final link commences.
1263 Note - if the user deliberately sets a start address of 0, the
1264 flag will not be set. */
1265 if (bfd_get_start_address (output_bfd) != 0)
1266 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
1268 globals = elf32_arm_hash_table (info);
1270 dynobj = elf_hash_table (info)->dynobj;
1273 sgot = bfd_get_section_by_name (dynobj, ".got");
1274 splt = bfd_get_section_by_name (dynobj, ".plt");
1276 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1277 sym_hashes = elf_sym_hashes (input_bfd);
1278 local_got_offsets = elf_local_got_offsets (input_bfd);
1279 r_symndx = ELF32_R_SYM (rel->r_info);
1282 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1284 if (addend & ((howto->src_mask + 1) >> 1))
1287 signed_addend &= ~ howto->src_mask;
1288 signed_addend |= addend;
1291 signed_addend = addend;
1293 addend = signed_addend = rel->r_addend;
1299 return bfd_reloc_ok;
1308 /* r_symndx will be zero only for relocs against symbols
1309 from removed linkonce sections, or sections discarded by
1312 return bfd_reloc_ok;
1314 /* Handle relocations which should use the PLT entry. ABS32/REL32
1315 will use the symbol's value, which may point to a PLT entry, but we
1316 don't need to handle that here. If we created a PLT entry, all
1317 branches in this object should go to it. */
1318 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
1321 && h->plt.offset != (bfd_vma) -1)
1323 /* If we've created a .plt section, and assigned a PLT entry to
1324 this function, it should not be known to bind locally. If
1325 it were, we would have cleared the PLT entry. */
1326 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
1328 value = (splt->output_section->vma
1329 + splt->output_offset
1331 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1332 contents, rel->r_offset, value,
1336 /* When generating a shared object, these relocations are copied
1337 into the output file to be resolved at run time. */
1339 && (input_section->flags & SEC_ALLOC)
1341 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1342 || h->root.type != bfd_link_hash_undefweak)
1343 && r_type != R_ARM_PC24
1344 && r_type != R_ARM_PLT32)
1346 Elf_Internal_Rela outrel;
1348 bfd_boolean skip, relocate;
1354 name = (bfd_elf_string_from_elf_section
1356 elf_elfheader (input_bfd)->e_shstrndx,
1357 elf_section_data (input_section)->rel_hdr.sh_name));
1359 return bfd_reloc_notsupported;
1361 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1362 && strcmp (bfd_get_section_name (input_bfd,
1366 sreloc = bfd_get_section_by_name (dynobj, name);
1367 BFD_ASSERT (sreloc != NULL);
1374 _bfd_elf_section_offset (output_bfd, info, input_section,
1376 if (outrel.r_offset == (bfd_vma) -1)
1378 else if (outrel.r_offset == (bfd_vma) -2)
1379 skip = TRUE, relocate = TRUE;
1380 outrel.r_offset += (input_section->output_section->vma
1381 + input_section->output_offset);
1384 memset (&outrel, 0, sizeof outrel);
1389 || (h->elf_link_hash_flags
1390 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1391 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1394 /* This symbol is local, or marked to become local. */
1396 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1399 loc = sreloc->contents;
1400 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
1401 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
1403 /* If this reloc is against an external symbol, we do not want to
1404 fiddle with the addend. Otherwise, we need to include the symbol
1405 value so that it becomes an addend for the dynamic reloc. */
1407 return bfd_reloc_ok;
1409 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1410 contents, rel->r_offset, value,
1413 else switch (r_type)
1416 case R_ARM_XPC25: /* Arm BLX instruction. */
1418 case R_ARM_PC24: /* Arm B/BL instruction */
1421 if (r_type == R_ARM_XPC25)
1423 /* Check for Arm calling Arm function. */
1424 /* FIXME: Should we translate the instruction into a BL
1425 instruction instead ? */
1426 if (sym_flags != STT_ARM_TFUNC)
1427 (*_bfd_error_handler) (_("\
1428 %s: Warning: Arm BLX instruction targets Arm function '%s'."),
1429 bfd_archive_filename (input_bfd),
1430 h ? h->root.root.string : "(local)");
1435 /* Check for Arm calling Thumb function. */
1436 if (sym_flags == STT_ARM_TFUNC)
1438 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1439 input_section, hit_data, sym_sec, rel->r_offset,
1440 signed_addend, value);
1441 return bfd_reloc_ok;
1445 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1446 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1448 /* The old way of doing things. Trearing the addend as a
1449 byte sized field and adding in the pipeline offset. */
1450 value -= (input_section->output_section->vma
1451 + input_section->output_offset);
1452 value -= rel->r_offset;
1455 if (! globals->no_pipeline_knowledge)
1460 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1462 S is the address of the symbol in the relocation.
1463 P is address of the instruction being relocated.
1464 A is the addend (extracted from the instruction) in bytes.
1466 S is held in 'value'.
1467 P is the base address of the section containing the instruction
1468 plus the offset of the reloc into that section, ie:
1469 (input_section->output_section->vma +
1470 input_section->output_offset +
1472 A is the addend, converted into bytes, ie:
1475 Note: None of these operations have knowledge of the pipeline
1476 size of the processor, thus it is up to the assembler to encode
1477 this information into the addend. */
1478 value -= (input_section->output_section->vma
1479 + input_section->output_offset);
1480 value -= rel->r_offset;
1481 value += (signed_addend << howto->size);
1483 /* Previous versions of this code also used to add in the pipeline
1484 offset here. This is wrong because the linker is not supposed
1485 to know about such things, and one day it might change. In order
1486 to support old binaries that need the old behaviour however, so
1487 we attempt to detect which ABI was used to create the reloc. */
1488 if (! globals->no_pipeline_knowledge)
1490 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
1492 i_ehdrp = elf_elfheader (input_bfd);
1494 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1499 signed_addend = value;
1500 signed_addend >>= howto->rightshift;
1502 /* It is not an error for an undefined weak reference to be
1503 out of range. Any program that branches to such a symbol
1504 is going to crash anyway, so there is no point worrying
1505 about getting the destination exactly right. */
1506 if (! h || h->root.type != bfd_link_hash_undefweak)
1508 /* Perform a signed range check. */
1509 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
1510 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1511 return bfd_reloc_overflow;
1515 /* If necessary set the H bit in the BLX instruction. */
1516 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1517 value = (signed_addend & howto->dst_mask)
1518 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1522 value = (signed_addend & howto->dst_mask)
1523 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
1528 if (sym_flags == STT_ARM_TFUNC)
1533 value -= (input_section->output_section->vma
1534 + input_section->output_offset + rel->r_offset);
1539 bfd_put_32 (input_bfd, value, hit_data);
1540 return bfd_reloc_ok;
1544 if ((long) value > 0x7f || (long) value < -0x80)
1545 return bfd_reloc_overflow;
1547 bfd_put_8 (input_bfd, value, hit_data);
1548 return bfd_reloc_ok;
1553 if ((long) value > 0x7fff || (long) value < -0x8000)
1554 return bfd_reloc_overflow;
1556 bfd_put_16 (input_bfd, value, hit_data);
1557 return bfd_reloc_ok;
1560 /* Support ldr and str instruction for the arm */
1561 /* Also thumb b (unconditional branch). ??? Really? */
1564 if ((long) value > 0x7ff || (long) value < -0x800)
1565 return bfd_reloc_overflow;
1567 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1568 bfd_put_32 (input_bfd, value, hit_data);
1569 return bfd_reloc_ok;
1571 case R_ARM_THM_ABS5:
1572 /* Support ldr and str instructions for the thumb. */
1574 /* Need to refetch addend. */
1575 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1576 /* ??? Need to determine shift amount from operand size. */
1577 addend >>= howto->rightshift;
1581 /* ??? Isn't value unsigned? */
1582 if ((long) value > 0x1f || (long) value < -0x10)
1583 return bfd_reloc_overflow;
1585 /* ??? Value needs to be properly shifted into place first. */
1586 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1587 bfd_put_16 (input_bfd, value, hit_data);
1588 return bfd_reloc_ok;
1591 case R_ARM_THM_XPC22:
1593 case R_ARM_THM_PC22:
1594 /* Thumb BL (branch long instruction). */
1597 bfd_boolean overflow = FALSE;
1598 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1599 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
1600 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
1601 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1603 bfd_signed_vma signed_check;
1606 /* Need to refetch the addend and squish the two 11 bit pieces
1609 bfd_vma upper = upper_insn & 0x7ff;
1610 bfd_vma lower = lower_insn & 0x7ff;
1611 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
1612 addend = (upper << 12) | (lower << 1);
1613 signed_addend = addend;
1617 if (r_type == R_ARM_THM_XPC22)
1619 /* Check for Thumb to Thumb call. */
1620 /* FIXME: Should we translate the instruction into a BL
1621 instruction instead ? */
1622 if (sym_flags == STT_ARM_TFUNC)
1623 (*_bfd_error_handler) (_("\
1624 %s: Warning: Thumb BLX instruction targets thumb function '%s'."),
1625 bfd_archive_filename (input_bfd),
1626 h ? h->root.root.string : "(local)");
1631 /* If it is not a call to Thumb, assume call to Arm.
1632 If it is a call relative to a section name, then it is not a
1633 function call at all, but rather a long jump. */
1634 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1636 if (elf32_thumb_to_arm_stub
1637 (info, sym_name, input_bfd, output_bfd, input_section,
1638 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1639 return bfd_reloc_ok;
1641 return bfd_reloc_dangerous;
1645 relocation = value + signed_addend;
1647 relocation -= (input_section->output_section->vma
1648 + input_section->output_offset
1651 if (! globals->no_pipeline_knowledge)
1653 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
1655 i_ehdrp = elf_elfheader (input_bfd);
1657 /* Previous versions of this code also used to add in the pipline
1658 offset here. This is wrong because the linker is not supposed
1659 to know about such things, and one day it might change. In order
1660 to support old binaries that need the old behaviour however, so
1661 we attempt to detect which ABI was used to create the reloc. */
1662 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1663 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1664 || i_ehdrp->e_ident[EI_OSABI] == 0)
1668 check = relocation >> howto->rightshift;
1670 /* If this is a signed value, the rightshift just dropped
1671 leading 1 bits (assuming twos complement). */
1672 if ((bfd_signed_vma) relocation >= 0)
1673 signed_check = check;
1675 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1677 /* Assumes two's complement. */
1678 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1682 if (r_type == R_ARM_THM_XPC22
1683 && ((lower_insn & 0x1800) == 0x0800))
1684 /* For a BLX instruction, make sure that the relocation is rounded up
1685 to a word boundary. This follows the semantics of the instruction
1686 which specifies that bit 1 of the target address will come from bit
1687 1 of the base address. */
1688 relocation = (relocation + 2) & ~ 3;
1690 /* Put RELOCATION back into the insn. */
1691 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1692 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1694 /* Put the relocated value back in the object file: */
1695 bfd_put_16 (input_bfd, upper_insn, hit_data);
1696 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1698 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1702 case R_ARM_THM_PC11:
1703 /* Thumb B (branch) instruction). */
1705 bfd_signed_vma relocation;
1706 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1707 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1708 bfd_signed_vma signed_check;
1711 /* Need to refetch addend. */
1712 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1713 if (addend & ((howto->src_mask + 1) >> 1))
1716 signed_addend &= ~ howto->src_mask;
1717 signed_addend |= addend;
1720 signed_addend = addend;
1721 /* The value in the insn has been right shifted. We need to
1722 undo this, so that we can perform the address calculation
1723 in terms of bytes. */
1724 signed_addend <<= howto->rightshift;
1726 relocation = value + signed_addend;
1728 relocation -= (input_section->output_section->vma
1729 + input_section->output_offset
1732 relocation >>= howto->rightshift;
1733 signed_check = relocation;
1734 relocation &= howto->dst_mask;
1735 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
1737 bfd_put_16 (input_bfd, relocation, hit_data);
1739 /* Assumes two's complement. */
1740 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1741 return bfd_reloc_overflow;
1743 return bfd_reloc_ok;
1746 case R_ARM_GNU_VTINHERIT:
1747 case R_ARM_GNU_VTENTRY:
1748 return bfd_reloc_ok;
1751 return bfd_reloc_notsupported;
1753 case R_ARM_GLOB_DAT:
1754 return bfd_reloc_notsupported;
1756 case R_ARM_JUMP_SLOT:
1757 return bfd_reloc_notsupported;
1759 case R_ARM_RELATIVE:
1760 return bfd_reloc_notsupported;
1763 /* Relocation is relative to the start of the
1764 global offset table. */
1766 BFD_ASSERT (sgot != NULL);
1768 return bfd_reloc_notsupported;
1770 /* If we are addressing a Thumb function, we need to adjust the
1771 address by one, so that attempts to call the function pointer will
1772 correctly interpret it as Thumb code. */
1773 if (sym_flags == STT_ARM_TFUNC)
1776 /* Note that sgot->output_offset is not involved in this
1777 calculation. We always want the start of .got. If we
1778 define _GLOBAL_OFFSET_TABLE in a different way, as is
1779 permitted by the ABI, we might have to change this
1781 value -= sgot->output_section->vma;
1782 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1783 contents, rel->r_offset, value,
1787 /* Use global offset table as symbol value. */
1788 BFD_ASSERT (sgot != NULL);
1791 return bfd_reloc_notsupported;
1793 value = sgot->output_section->vma;
1794 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1795 contents, rel->r_offset, value,
1799 /* Relocation is to the entry for this symbol in the
1800 global offset table. */
1802 return bfd_reloc_notsupported;
1809 off = h->got.offset;
1810 BFD_ASSERT (off != (bfd_vma) -1);
1811 dyn = globals->root.dynamic_sections_created;
1813 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1815 && SYMBOL_REFERENCES_LOCAL (info, h))
1816 || (ELF_ST_VISIBILITY (h->other)
1817 && h->root.type == bfd_link_hash_undefweak))
1819 /* This is actually a static link, or it is a -Bsymbolic link
1820 and the symbol is defined locally. We must initialize this
1821 entry in the global offset table. Since the offset must
1822 always be a multiple of 4, we use the least significant bit
1823 to record whether we have initialized it already.
1825 When doing a dynamic link, we create a .rel.got relocation
1826 entry to initialize the value. This is done in the
1827 finish_dynamic_symbol routine. */
1832 /* If we are addressing a Thumb function, we need to
1833 adjust the address by one, so that attempts to
1834 call the function pointer will correctly
1835 interpret it as Thumb code. */
1836 if (sym_flags == STT_ARM_TFUNC)
1839 bfd_put_32 (output_bfd, value, sgot->contents + off);
1844 value = sgot->output_offset + off;
1850 BFD_ASSERT (local_got_offsets != NULL &&
1851 local_got_offsets[r_symndx] != (bfd_vma) -1);
1853 off = local_got_offsets[r_symndx];
1855 /* The offset must always be a multiple of 4. We use the
1856 least significant bit to record whether we have already
1857 generated the necessary reloc. */
1862 bfd_put_32 (output_bfd, value, sgot->contents + off);
1867 Elf_Internal_Rela outrel;
1870 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1871 BFD_ASSERT (srelgot != NULL);
1873 outrel.r_offset = (sgot->output_section->vma
1874 + sgot->output_offset
1876 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1877 loc = srelgot->contents;
1878 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
1879 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
1882 local_got_offsets[r_symndx] |= 1;
1885 value = sgot->output_offset + off;
1888 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1889 contents, rel->r_offset, value,
1893 return bfd_reloc_notsupported;
1895 case R_ARM_AMP_VCALL9:
1896 return bfd_reloc_notsupported;
1898 case R_ARM_RSBREL32:
1899 return bfd_reloc_notsupported;
1901 case R_ARM_THM_RPC22:
1902 return bfd_reloc_notsupported;
1905 return bfd_reloc_notsupported;
1908 return bfd_reloc_notsupported;
1911 return bfd_reloc_notsupported;
1914 return bfd_reloc_notsupported;
1917 return bfd_reloc_notsupported;
1922 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1924 arm_add_to_rel (abfd, address, howto, increment)
1927 reloc_howto_type * howto;
1928 bfd_signed_vma increment;
1930 bfd_signed_vma addend;
1932 if (howto->type == R_ARM_THM_PC22)
1934 int upper_insn, lower_insn;
1937 upper_insn = bfd_get_16 (abfd, address);
1938 lower_insn = bfd_get_16 (abfd, address + 2);
1939 upper = upper_insn & 0x7ff;
1940 lower = lower_insn & 0x7ff;
1942 addend = (upper << 12) | (lower << 1);
1943 addend += increment;
1946 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1947 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1949 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
1950 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
1956 contents = bfd_get_32 (abfd, address);
1958 /* Get the (signed) value from the instruction. */
1959 addend = contents & howto->src_mask;
1960 if (addend & ((howto->src_mask + 1) >> 1))
1962 bfd_signed_vma mask;
1965 mask &= ~ howto->src_mask;
1969 /* Add in the increment, (which is a byte value). */
1970 switch (howto->type)
1973 addend += increment;
1977 addend <<= howto->size;
1978 addend += increment;
1980 /* Should we check for overflow here ? */
1982 /* Drop any undesired bits. */
1983 addend >>= howto->rightshift;
1987 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1989 bfd_put_32 (abfd, contents, address);
1992 #endif /* USE_REL */
1994 /* Relocate an ARM ELF section. */
1996 elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1997 contents, relocs, local_syms, local_sections)
1999 struct bfd_link_info *info;
2001 asection *input_section;
2003 Elf_Internal_Rela *relocs;
2004 Elf_Internal_Sym *local_syms;
2005 asection **local_sections;
2007 Elf_Internal_Shdr *symtab_hdr;
2008 struct elf_link_hash_entry **sym_hashes;
2009 Elf_Internal_Rela *rel;
2010 Elf_Internal_Rela *relend;
2014 if (info->relocatable)
2018 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2019 sym_hashes = elf_sym_hashes (input_bfd);
2022 relend = relocs + input_section->reloc_count;
2023 for (; rel < relend; rel++)
2026 reloc_howto_type * howto;
2027 unsigned long r_symndx;
2028 Elf_Internal_Sym * sym;
2030 struct elf_link_hash_entry * h;
2032 bfd_reloc_status_type r;
2035 r_symndx = ELF32_R_SYM (rel->r_info);
2036 r_type = ELF32_R_TYPE (rel->r_info);
2038 if ( r_type == R_ARM_GNU_VTENTRY
2039 || r_type == R_ARM_GNU_VTINHERIT)
2042 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
2043 howto = bfd_reloc.howto;
2046 if (info->relocatable)
2048 /* This is a relocatable link. We don't have to change
2049 anything, unless the reloc is against a section symbol,
2050 in which case we have to adjust according to where the
2051 section symbol winds up in the output section. */
2052 if (r_symndx < symtab_hdr->sh_info)
2054 sym = local_syms + r_symndx;
2055 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2057 sec = local_sections[r_symndx];
2058 arm_add_to_rel (input_bfd, contents + rel->r_offset,
2060 (bfd_signed_vma) (sec->output_offset
2069 /* This is a final link. */
2074 if (r_symndx < symtab_hdr->sh_info)
2076 sym = local_syms + r_symndx;
2077 sec = local_sections[r_symndx];
2079 relocation = (sec->output_section->vma
2080 + sec->output_offset
2082 if ((sec->flags & SEC_MERGE)
2083 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2086 bfd_vma addend, value;
2088 if (howto->rightshift)
2090 (*_bfd_error_handler)
2091 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
2092 bfd_archive_filename (input_bfd),
2093 bfd_get_section_name (input_bfd, input_section),
2094 (long) rel->r_offset, howto->name);
2098 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2100 /* Get the (signed) value from the instruction. */
2101 addend = value & howto->src_mask;
2102 if (addend & ((howto->src_mask + 1) >> 1))
2104 bfd_signed_vma mask;
2107 mask &= ~ howto->src_mask;
2112 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
2114 addend += msec->output_section->vma + msec->output_offset;
2115 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
2116 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2119 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2125 bfd_boolean unresolved_reloc;
2127 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
2128 symtab_hdr, relocation,
2129 sec, unresolved_reloc, info,
2132 if (unresolved_reloc || relocation != 0)
2134 /* In these cases, we don't need the relocation value.
2135 We check specially because in some obscure cases
2136 sec->output_section will be NULL. */
2141 case R_ARM_THM_PC22:
2144 (!info->symbolic && h->dynindx != -1)
2145 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
2147 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2148 && ((input_section->flags & SEC_ALLOC) != 0
2149 /* DWARF will emit R_ARM_ABS32 relocations in its
2150 sections against symbols defined externally
2151 in shared libraries. We can't do anything
2153 || ((input_section->flags & SEC_DEBUGGING) != 0
2154 && (h->elf_link_hash_flags
2155 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2165 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
2166 (elf_hash_table (info)->dynamic_sections_created,
2169 || (!info->symbolic && h->dynindx != -1)
2170 || (h->elf_link_hash_flags
2171 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2176 if (h->plt.offset != (bfd_vma)-1)
2181 if (unresolved_reloc)
2183 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
2184 bfd_archive_filename (input_bfd),
2186 h->root.root.string,
2187 bfd_get_section_name (input_bfd, input_section));
2194 name = h->root.root.string;
2197 name = (bfd_elf_string_from_elf_section
2198 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2199 if (name == NULL || *name == '\0')
2200 name = bfd_section_name (input_bfd, sec);
2203 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2204 input_section, contents, rel,
2205 relocation, info, sec, name,
2206 (h ? ELF_ST_TYPE (h->type) :
2207 ELF_ST_TYPE (sym->st_info)), h);
2209 if (r != bfd_reloc_ok)
2211 const char * msg = (const char *) 0;
2215 case bfd_reloc_overflow:
2216 /* If the overflowing reloc was to an undefined symbol,
2217 we have already printed one error message and there
2218 is no point complaining again. */
2220 h->root.type != bfd_link_hash_undefined)
2221 && (!((*info->callbacks->reloc_overflow)
2222 (info, name, howto->name, (bfd_vma) 0,
2223 input_bfd, input_section, rel->r_offset))))
2227 case bfd_reloc_undefined:
2228 if (!((*info->callbacks->undefined_symbol)
2229 (info, name, input_bfd, input_section,
2230 rel->r_offset, TRUE)))
2234 case bfd_reloc_outofrange:
2235 msg = _("internal error: out of range error");
2238 case bfd_reloc_notsupported:
2239 msg = _("internal error: unsupported relocation error");
2242 case bfd_reloc_dangerous:
2243 msg = _("internal error: dangerous error");
2247 msg = _("internal error: unknown error");
2251 if (!((*info->callbacks->warning)
2252 (info, msg, name, input_bfd, input_section,
2263 /* Set the right machine number. */
2266 elf32_arm_object_p (abfd)
2271 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
2273 if (mach != bfd_mach_arm_unknown)
2274 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
2276 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
2277 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
2280 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
2285 /* Function to keep ARM specific flags in the ELF header. */
2287 elf32_arm_set_private_flags (abfd, flags)
2291 if (elf_flags_init (abfd)
2292 && elf_elfheader (abfd)->e_flags != flags)
2294 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2296 if (flags & EF_ARM_INTERWORK)
2297 (*_bfd_error_handler) (_("\
2298 Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
2299 bfd_archive_filename (abfd));
2301 _bfd_error_handler (_("\
2302 Warning: Clearing the interworking flag of %s due to outside request"),
2303 bfd_archive_filename (abfd));
2308 elf_elfheader (abfd)->e_flags = flags;
2309 elf_flags_init (abfd) = TRUE;
2315 /* Copy backend specific data from one object module to another. */
2318 elf32_arm_copy_private_bfd_data (ibfd, obfd)
2325 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2326 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2329 in_flags = elf_elfheader (ibfd)->e_flags;
2330 out_flags = elf_elfheader (obfd)->e_flags;
2332 if (elf_flags_init (obfd)
2333 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2334 && in_flags != out_flags)
2336 /* Cannot mix APCS26 and APCS32 code. */
2337 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
2340 /* Cannot mix float APCS and non-float APCS code. */
2341 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
2344 /* If the src and dest have different interworking flags
2345 then turn off the interworking bit. */
2346 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
2348 if (out_flags & EF_ARM_INTERWORK)
2349 _bfd_error_handler (_("\
2350 Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
2351 bfd_get_filename (obfd),
2352 bfd_archive_filename (ibfd));
2354 in_flags &= ~EF_ARM_INTERWORK;
2357 /* Likewise for PIC, though don't warn for this case. */
2358 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2359 in_flags &= ~EF_ARM_PIC;
2362 elf_elfheader (obfd)->e_flags = in_flags;
2363 elf_flags_init (obfd) = TRUE;
2368 /* Merge backend specific data from an object file to the output
2369 object file when linking. */
2372 elf32_arm_merge_private_bfd_data (ibfd, obfd)
2378 bfd_boolean flags_compatible = TRUE;
2381 /* Check if we have the same endianess. */
2382 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2385 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2386 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2389 /* The input BFD must have had its flags initialised. */
2390 /* The following seems bogus to me -- The flags are initialized in
2391 the assembler but I don't think an elf_flags_init field is
2392 written into the object. */
2393 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2395 in_flags = elf_elfheader (ibfd)->e_flags;
2396 out_flags = elf_elfheader (obfd)->e_flags;
2398 if (!elf_flags_init (obfd))
2400 /* If the input is the default architecture and had the default
2401 flags then do not bother setting the flags for the output
2402 architecture, instead allow future merges to do this. If no
2403 future merges ever set these flags then they will retain their
2404 uninitialised values, which surprise surprise, correspond
2405 to the default values. */
2406 if (bfd_get_arch_info (ibfd)->the_default
2407 && elf_elfheader (ibfd)->e_flags == 0)
2410 elf_flags_init (obfd) = TRUE;
2411 elf_elfheader (obfd)->e_flags = in_flags;
2413 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2414 && bfd_get_arch_info (obfd)->the_default)
2415 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2420 /* Determine what should happen if the input ARM architecture
2421 does not match the output ARM architecture. */
2422 if (! bfd_arm_merge_machines (ibfd, obfd))
2425 /* Identical flags must be compatible. */
2426 if (in_flags == out_flags)
2429 /* Check to see if the input BFD actually contains any sections. If
2430 not, its flags may not have been initialised either, but it
2431 cannot actually cause any incompatibility. Do not short-circuit
2432 dynamic objects; their section list may be emptied by
2433 elf_link_add_object_symbols. */
2435 if (!(ibfd->flags & DYNAMIC))
2437 bfd_boolean null_input_bfd = TRUE;
2439 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2441 /* Ignore synthetic glue sections. */
2442 if (strcmp (sec->name, ".glue_7")
2443 && strcmp (sec->name, ".glue_7t"))
2445 null_input_bfd = FALSE;
2453 /* Complain about various flag mismatches. */
2454 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2456 _bfd_error_handler (_("\
2457 ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"),
2458 bfd_archive_filename (ibfd),
2459 (in_flags & EF_ARM_EABIMASK) >> 24,
2460 bfd_get_filename (obfd),
2461 (out_flags & EF_ARM_EABIMASK) >> 24);
2465 /* Not sure what needs to be checked for EABI versions >= 1. */
2466 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2468 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
2470 _bfd_error_handler (_("\
2471 ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"),
2472 bfd_archive_filename (ibfd),
2473 in_flags & EF_ARM_APCS_26 ? 26 : 32,
2474 bfd_get_filename (obfd),
2475 out_flags & EF_ARM_APCS_26 ? 26 : 32);
2476 flags_compatible = FALSE;
2479 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
2481 if (in_flags & EF_ARM_APCS_FLOAT)
2482 _bfd_error_handler (_("\
2483 ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"),
2484 bfd_archive_filename (ibfd),
2485 bfd_get_filename (obfd));
2487 _bfd_error_handler (_("\
2488 ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"),
2489 bfd_archive_filename (ibfd),
2490 bfd_get_filename (obfd));
2492 flags_compatible = FALSE;
2495 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
2497 if (in_flags & EF_ARM_VFP_FLOAT)
2498 _bfd_error_handler (_("\
2499 ERROR: %s uses VFP instructions, whereas %s does not"),
2500 bfd_archive_filename (ibfd),
2501 bfd_get_filename (obfd));
2503 _bfd_error_handler (_("\
2504 ERROR: %s uses FPA instructions, whereas %s does not"),
2505 bfd_archive_filename (ibfd),
2506 bfd_get_filename (obfd));
2508 flags_compatible = FALSE;
2511 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
2513 if (in_flags & EF_ARM_MAVERICK_FLOAT)
2514 _bfd_error_handler (_("\
2515 ERROR: %s uses Maverick instructions, whereas %s does not"),
2516 bfd_archive_filename (ibfd),
2517 bfd_get_filename (obfd));
2519 _bfd_error_handler (_("\
2520 ERROR: %s does not use Maverick instructions, whereas %s does"),
2521 bfd_archive_filename (ibfd),
2522 bfd_get_filename (obfd));
2524 flags_compatible = FALSE;
2527 #ifdef EF_ARM_SOFT_FLOAT
2528 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
2530 /* We can allow interworking between code that is VFP format
2531 layout, and uses either soft float or integer regs for
2532 passing floating point arguments and results. We already
2533 know that the APCS_FLOAT flags match; similarly for VFP
2535 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
2536 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
2538 if (in_flags & EF_ARM_SOFT_FLOAT)
2539 _bfd_error_handler (_("\
2540 ERROR: %s uses software FP, whereas %s uses hardware FP"),
2541 bfd_archive_filename (ibfd),
2542 bfd_get_filename (obfd));
2544 _bfd_error_handler (_("\
2545 ERROR: %s uses hardware FP, whereas %s uses software FP"),
2546 bfd_archive_filename (ibfd),
2547 bfd_get_filename (obfd));
2549 flags_compatible = FALSE;
2554 /* Interworking mismatch is only a warning. */
2555 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
2557 if (in_flags & EF_ARM_INTERWORK)
2559 _bfd_error_handler (_("\
2560 Warning: %s supports interworking, whereas %s does not"),
2561 bfd_archive_filename (ibfd),
2562 bfd_get_filename (obfd));
2566 _bfd_error_handler (_("\
2567 Warning: %s does not support interworking, whereas %s does"),
2568 bfd_archive_filename (ibfd),
2569 bfd_get_filename (obfd));
2574 return flags_compatible;
2577 /* Display the flags field. */
2580 elf32_arm_print_private_bfd_data (abfd, ptr)
2584 FILE * file = (FILE *) ptr;
2585 unsigned long flags;
2587 BFD_ASSERT (abfd != NULL && ptr != NULL);
2589 /* Print normal ELF private data. */
2590 _bfd_elf_print_private_bfd_data (abfd, ptr);
2592 flags = elf_elfheader (abfd)->e_flags;
2593 /* Ignore init flag - it may not be set, despite the flags field
2594 containing valid data. */
2596 /* xgettext:c-format */
2597 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2599 switch (EF_ARM_EABI_VERSION (flags))
2601 case EF_ARM_EABI_UNKNOWN:
2602 /* The following flag bits are GNU extensions and not part of the
2603 official ARM ELF extended ABI. Hence they are only decoded if
2604 the EABI version is not set. */
2605 if (flags & EF_ARM_INTERWORK)
2606 fprintf (file, _(" [interworking enabled]"));
2608 if (flags & EF_ARM_APCS_26)
2609 fprintf (file, " [APCS-26]");
2611 fprintf (file, " [APCS-32]");
2613 if (flags & EF_ARM_VFP_FLOAT)
2614 fprintf (file, _(" [VFP float format]"));
2615 else if (flags & EF_ARM_MAVERICK_FLOAT)
2616 fprintf (file, _(" [Maverick float format]"));
2618 fprintf (file, _(" [FPA float format]"));
2620 if (flags & EF_ARM_APCS_FLOAT)
2621 fprintf (file, _(" [floats passed in float registers]"));
2623 if (flags & EF_ARM_PIC)
2624 fprintf (file, _(" [position independent]"));
2626 if (flags & EF_ARM_NEW_ABI)
2627 fprintf (file, _(" [new ABI]"));
2629 if (flags & EF_ARM_OLD_ABI)
2630 fprintf (file, _(" [old ABI]"));
2632 if (flags & EF_ARM_SOFT_FLOAT)
2633 fprintf (file, _(" [software FP]"));
2635 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
2636 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
2637 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
2638 | EF_ARM_MAVERICK_FLOAT);
2641 case EF_ARM_EABI_VER1:
2642 fprintf (file, _(" [Version1 EABI]"));
2644 if (flags & EF_ARM_SYMSARESORTED)
2645 fprintf (file, _(" [sorted symbol table]"));
2647 fprintf (file, _(" [unsorted symbol table]"));
2649 flags &= ~ EF_ARM_SYMSARESORTED;
2652 case EF_ARM_EABI_VER2:
2653 fprintf (file, _(" [Version2 EABI]"));
2655 if (flags & EF_ARM_SYMSARESORTED)
2656 fprintf (file, _(" [sorted symbol table]"));
2658 fprintf (file, _(" [unsorted symbol table]"));
2660 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2661 fprintf (file, _(" [dynamic symbols use segment index]"));
2663 if (flags & EF_ARM_MAPSYMSFIRST)
2664 fprintf (file, _(" [mapping symbols precede others]"));
2666 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
2667 | EF_ARM_MAPSYMSFIRST);
2671 fprintf (file, _(" <EABI version unrecognised>"));
2675 flags &= ~ EF_ARM_EABIMASK;
2677 if (flags & EF_ARM_RELEXEC)
2678 fprintf (file, _(" [relocatable executable]"));
2680 if (flags & EF_ARM_HASENTRY)
2681 fprintf (file, _(" [has entry point]"));
2683 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2686 fprintf (file, _("<Unrecognised flag bits set>"));
2694 elf32_arm_get_symbol_type (elf_sym, type)
2695 Elf_Internal_Sym * elf_sym;
2698 switch (ELF_ST_TYPE (elf_sym->st_info))
2701 return ELF_ST_TYPE (elf_sym->st_info);
2704 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2705 This allows us to distinguish between data used by Thumb instructions
2706 and non-data (which is probably code) inside Thumb regions of an
2708 if (type != STT_OBJECT)
2709 return ELF_ST_TYPE (elf_sym->st_info);
2720 elf32_arm_gc_mark_hook (sec, info, rel, h, sym)
2722 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2723 Elf_Internal_Rela *rel;
2724 struct elf_link_hash_entry *h;
2725 Elf_Internal_Sym *sym;
2729 switch (ELF32_R_TYPE (rel->r_info))
2731 case R_ARM_GNU_VTINHERIT:
2732 case R_ARM_GNU_VTENTRY:
2736 switch (h->root.type)
2738 case bfd_link_hash_defined:
2739 case bfd_link_hash_defweak:
2740 return h->root.u.def.section;
2742 case bfd_link_hash_common:
2743 return h->root.u.c.p->section;
2751 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
2756 /* Update the got entry reference counts for the section being removed. */
2759 elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
2760 bfd *abfd ATTRIBUTE_UNUSED;
2761 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2762 asection *sec ATTRIBUTE_UNUSED;
2763 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
2765 Elf_Internal_Shdr *symtab_hdr;
2766 struct elf_link_hash_entry **sym_hashes;
2767 bfd_signed_vma *local_got_refcounts;
2768 const Elf_Internal_Rela *rel, *relend;
2769 unsigned long r_symndx;
2770 struct elf_link_hash_entry *h;
2772 elf_section_data (sec)->local_dynrel = NULL;
2774 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2775 sym_hashes = elf_sym_hashes (abfd);
2776 local_got_refcounts = elf_local_got_refcounts (abfd);
2778 relend = relocs + sec->reloc_count;
2779 for (rel = relocs; rel < relend; rel++)
2780 switch (ELF32_R_TYPE (rel->r_info))
2783 r_symndx = ELF32_R_SYM (rel->r_info);
2784 if (r_symndx >= symtab_hdr->sh_info)
2786 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2787 if (h->got.refcount > 0)
2788 h->got.refcount -= 1;
2790 else if (local_got_refcounts != NULL)
2792 if (local_got_refcounts[r_symndx] > 0)
2793 local_got_refcounts[r_symndx] -= 1;
2801 r_symndx = ELF32_R_SYM (rel->r_info);
2802 if (r_symndx >= symtab_hdr->sh_info)
2804 struct elf32_arm_link_hash_entry *eh;
2805 struct elf32_arm_relocs_copied **pp;
2806 struct elf32_arm_relocs_copied *p;
2808 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2810 if (h->plt.refcount > 0)
2811 h->plt.refcount -= 1;
2813 if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
2814 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
2816 eh = (struct elf32_arm_link_hash_entry *) h;
2818 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
2820 if (p->section == sec)
2838 /* Look through the relocs for a section during the first phase. */
2841 elf32_arm_check_relocs (abfd, info, sec, relocs)
2843 struct bfd_link_info *info;
2845 const Elf_Internal_Rela *relocs;
2847 Elf_Internal_Shdr *symtab_hdr;
2848 struct elf_link_hash_entry **sym_hashes;
2849 struct elf_link_hash_entry **sym_hashes_end;
2850 const Elf_Internal_Rela *rel;
2851 const Elf_Internal_Rela *rel_end;
2854 bfd_vma *local_got_offsets;
2855 struct elf32_arm_link_hash_table *htab;
2857 if (info->relocatable)
2860 htab = elf32_arm_hash_table (info);
2863 dynobj = elf_hash_table (info)->dynobj;
2864 local_got_offsets = elf_local_got_offsets (abfd);
2866 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2867 sym_hashes = elf_sym_hashes (abfd);
2868 sym_hashes_end = sym_hashes
2869 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2871 if (!elf_bad_symtab (abfd))
2872 sym_hashes_end -= symtab_hdr->sh_info;
2874 rel_end = relocs + sec->reloc_count;
2875 for (rel = relocs; rel < rel_end; rel++)
2877 struct elf_link_hash_entry *h;
2878 unsigned long r_symndx;
2880 r_symndx = ELF32_R_SYM (rel->r_info);
2881 if (r_symndx < symtab_hdr->sh_info)
2884 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2886 switch (ELF32_R_TYPE (rel->r_info))
2889 /* This symbol requires a global offset table entry. */
2896 bfd_signed_vma *local_got_refcounts;
2898 /* This is a global offset table entry for a local symbol. */
2899 local_got_refcounts = elf_local_got_refcounts (abfd);
2900 if (local_got_refcounts == NULL)
2904 size = symtab_hdr->sh_info;
2905 size *= (sizeof (bfd_signed_vma) + sizeof(char));
2906 local_got_refcounts = ((bfd_signed_vma *)
2907 bfd_zalloc (abfd, size));
2908 if (local_got_refcounts == NULL)
2910 elf_local_got_refcounts (abfd) = local_got_refcounts;
2912 local_got_refcounts[r_symndx] += 1;
2918 if (htab->sgot == NULL)
2920 if (htab->root.dynobj == NULL)
2921 htab->root.dynobj = abfd;
2922 if (!create_got_section (htab->root.dynobj, info))
2933 /* If this reloc is in a read-only section, we might
2934 need a copy reloc. We can't check reliably at this
2935 stage whether the section is read-only, as input
2936 sections have not yet been mapped to output sections.
2937 Tentatively set the flag for now, and correct in
2938 adjust_dynamic_symbol. */
2940 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
2942 /* We may need a .plt entry if the function this reloc
2943 refers to is in a different object. We can't tell for
2944 sure yet, because something later might force the
2946 if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24
2947 || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32)
2948 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2950 /* If we create a PLT entry, this relocation will reference
2951 it, even if it's an ABS32 relocation. */
2952 h->plt.refcount += 1;
2955 /* If we are creating a shared library, and this is a reloc
2956 against a global symbol, or a non PC relative reloc
2957 against a local symbol, then we need to copy the reloc
2958 into the shared library. However, if we are linking with
2959 -Bsymbolic, we do not need to copy a reloc against a
2960 global symbol which is defined in an object we are
2961 including in the link (i.e., DEF_REGULAR is set). At
2962 this point we have not seen all the input files, so it is
2963 possible that DEF_REGULAR is not set now but will be set
2964 later (it is never cleared). We account for that
2965 possibility below by storing information in the
2966 relocs_copied field of the hash table entry. */
2968 && (sec->flags & SEC_ALLOC) != 0
2969 && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2970 && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32)
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_elf32_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_elf32_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_elf32_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_elf32_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_elf32_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_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (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"