1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000 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. */
21 typedef unsigned long int insn32;
22 typedef unsigned short int insn16;
24 static boolean elf32_arm_set_private_flags
25 PARAMS ((bfd *, flagword));
26 static boolean elf32_arm_copy_private_bfd_data
27 PARAMS ((bfd *, bfd *));
28 static boolean elf32_arm_merge_private_bfd_data
29 PARAMS ((bfd *, bfd *));
30 static boolean elf32_arm_print_private_bfd_data
31 PARAMS ((bfd *, PTR));
32 static int elf32_arm_get_symbol_type
33 PARAMS (( Elf_Internal_Sym *, int));
34 static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
36 static bfd_reloc_status_type elf32_arm_final_link_relocate
37 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
38 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
39 const char *, unsigned char, struct elf_link_hash_entry *));
41 static insn32 insert_thumb_branch
42 PARAMS ((insn32, int));
43 static struct elf_link_hash_entry *find_thumb_glue
44 PARAMS ((struct bfd_link_info *, CONST char *, bfd *));
45 static struct elf_link_hash_entry *find_arm_glue
46 PARAMS ((struct bfd_link_info *, CONST char *, bfd *));
47 static void record_arm_to_thumb_glue
48 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
49 static void record_thumb_to_arm_glue
50 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
51 static void elf32_arm_post_process_headers
52 PARAMS ((bfd *, struct bfd_link_info *));
53 static int elf32_arm_to_thumb_stub
54 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
55 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
56 static int elf32_thumb_to_arm_stub
57 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
58 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
60 /* The linker script knows the section names for placement.
61 The entry_names are used to do simple name mangling on the stubs.
62 Given a function name, and its type, the stub can be found. The
63 name can be changed. The only requirement is the %s be present.
66 #define INTERWORK_FLAG( abfd ) (elf_elfheader (abfd)->e_flags & EF_INTERWORK)
68 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
69 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
71 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
72 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
74 /* The name of the dynamic interpreter. This is put in the .interp
76 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
78 /* The size in bytes of an entry in the procedure linkage table. */
80 #define PLT_ENTRY_SIZE 16
82 /* The first entry in a procedure linkage table looks like
83 this. It is set up so that any shared library function that is
84 called before the relocation has been set up calls the dynamic
87 static const bfd_byte elf32_arm_plt0_entry [PLT_ENTRY_SIZE] =
89 0x04, 0xe0, 0x2d, 0xe5, /* str lr, [sp, #-4]! */
90 0x10, 0xe0, 0x9f, 0xe5, /* ldr lr, [pc, #16] */
91 0x0e, 0xe0, 0x8f, 0xe0, /* adr lr, pc, lr */
92 0x08, 0xf0, 0xbe, 0xe5 /* ldr pc, [lr, #8]! */
95 /* Subsequent entries in a procedure linkage table look like
98 static const bfd_byte elf32_arm_plt_entry [PLT_ENTRY_SIZE] =
100 0x04, 0xc0, 0x9f, 0xe5, /* ldr ip, [pc, #4] */
101 0x0c, 0xc0, 0x8f, 0xe0, /* add ip, pc, ip */
102 0x00, 0xf0, 0x9c, 0xe5, /* ldr pc, [ip] */
103 0x00, 0x00, 0x00, 0x00 /* offset to symbol in got */
107 /* The ARM linker needs to keep track of the number of relocs that it
108 decides to copy in check_relocs for each symbol. This is so that
109 it can discard PC relative relocs if it doesn't need them when
110 linking with -Bsymbolic. We store the information in a field
111 extending the regular ELF linker hash table. */
113 /* This structure keeps track of the number of PC relative relocs we
114 have copied for a given symbol. */
116 struct elf32_arm_pcrel_relocs_copied
119 struct elf32_arm_pcrel_relocs_copied * next;
120 /* A section in dynobj. */
122 /* Number of relocs copied in this section. */
126 /* Arm ELF linker hash entry. */
128 struct elf32_arm_link_hash_entry
130 struct elf_link_hash_entry root;
132 /* Number of PC relative relocs copied for this symbol. */
133 struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied;
136 /* Declare this now that the above structures are defined. */
138 static boolean elf32_arm_discard_copies
139 PARAMS ((struct elf32_arm_link_hash_entry *, PTR));
141 /* Traverse an arm ELF linker hash table. */
143 #define elf32_arm_link_hash_traverse(table, func, info) \
144 (elf_link_hash_traverse \
146 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
149 /* Get the ARM elf linker hash table from a link_info structure. */
150 #define elf32_arm_hash_table(info) \
151 ((struct elf32_arm_link_hash_table *) ((info)->hash))
153 /* ARM ELF linker hash table */
154 struct elf32_arm_link_hash_table
156 /* The main hash table. */
157 struct elf_link_hash_table root;
159 /* The size in bytes of the section containg the Thumb-to-ARM glue. */
160 long int thumb_glue_size;
162 /* The size in bytes of the section containg the ARM-to-Thumb glue. */
163 long int arm_glue_size;
165 /* An arbitary input BFD chosen to hold the glue sections. */
166 bfd * bfd_of_glue_owner;
168 /* A boolean indicating whether knowledge of the ARM's pipeline
169 length should be applied by the linker. */
170 int no_pipeline_knowledge;
174 /* Create an entry in an ARM ELF linker hash table. */
176 static struct bfd_hash_entry *
177 elf32_arm_link_hash_newfunc (entry, table, string)
178 struct bfd_hash_entry * entry;
179 struct bfd_hash_table * table;
182 struct elf32_arm_link_hash_entry * ret =
183 (struct elf32_arm_link_hash_entry *) entry;
185 /* Allocate the structure if it has not already been allocated by a
187 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
188 ret = ((struct elf32_arm_link_hash_entry *)
189 bfd_hash_allocate (table,
190 sizeof (struct elf32_arm_link_hash_entry)));
191 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
192 return (struct bfd_hash_entry *) ret;
194 /* Call the allocation method of the superclass. */
195 ret = ((struct elf32_arm_link_hash_entry *)
196 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
198 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
199 ret->pcrel_relocs_copied = NULL;
201 return (struct bfd_hash_entry *) ret;
204 /* Create an ARM elf linker hash table */
206 static struct bfd_link_hash_table *
207 elf32_arm_link_hash_table_create (abfd)
210 struct elf32_arm_link_hash_table *ret;
212 ret = ((struct elf32_arm_link_hash_table *)
213 bfd_alloc (abfd, sizeof (struct elf32_arm_link_hash_table)));
214 if (ret == (struct elf32_arm_link_hash_table *) NULL)
217 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
218 elf32_arm_link_hash_newfunc))
220 bfd_release (abfd, ret);
224 ret->thumb_glue_size = 0;
225 ret->arm_glue_size = 0;
226 ret->bfd_of_glue_owner = NULL;
227 ret->no_pipeline_knowledge = 0;
229 return &ret->root.root;
232 static struct elf_link_hash_entry *
233 find_thumb_glue (link_info, name, input_bfd)
234 struct bfd_link_info *link_info;
239 struct elf_link_hash_entry *hash;
240 struct elf32_arm_link_hash_table *hash_table;
242 /* We need a pointer to the armelf specific hash table. */
243 hash_table = elf32_arm_hash_table (link_info);
247 bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1));
249 BFD_ASSERT (tmp_name);
251 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
253 hash = elf_link_hash_lookup
254 (&(hash_table)->root, tmp_name, false, false, true);
257 /* xgettext:c-format */
258 _bfd_error_handler (_ ("%s: unable to find THUMB glue '%s' for `%s'"),
259 bfd_get_filename (input_bfd), tmp_name, name);
266 static struct elf_link_hash_entry *
267 find_arm_glue (link_info, name, input_bfd)
268 struct bfd_link_info *link_info;
273 struct elf_link_hash_entry *myh;
274 struct elf32_arm_link_hash_table *hash_table;
276 /* We need a pointer to the elfarm specific hash table. */
277 hash_table = elf32_arm_hash_table (link_info);
280 bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
282 BFD_ASSERT (tmp_name);
284 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
286 myh = elf_link_hash_lookup
287 (&(hash_table)->root, tmp_name, false, false, true);
290 /* xgettext:c-format */
291 _bfd_error_handler (_ ("%s: unable to find ARM glue '%s' for `%s'"),
292 bfd_get_filename (input_bfd), tmp_name, name);
307 .word func @ behave as if you saw a ARM_32 reloc
310 #define ARM2THUMB_GLUE_SIZE 12
311 static const insn32 a2t1_ldr_insn = 0xe59fc000;
312 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
313 static const insn32 a2t3_func_addr_insn = 0x00000001;
316 Thumb->ARM: Thumb->(non-interworking aware) ARM
320 __func_from_thumb: __func_from_thumb:
322 nop ldr r6, __func_addr
324 __func_change_to_arm: bx r6
326 __func_back_to_thumb:
333 #define THUMB2ARM_GLUE_SIZE 8
334 static const insn16 t2a1_bx_pc_insn = 0x4778;
335 static const insn16 t2a2_noop_insn = 0x46c0;
336 static const insn32 t2a3_b_insn = 0xea000000;
338 static const insn16 t2a1_push_insn = 0xb540;
339 static const insn16 t2a2_ldr_insn = 0x4e03;
340 static const insn16 t2a3_mov_insn = 0x46fe;
341 static const insn16 t2a4_bx_insn = 0x4730;
342 static const insn32 t2a5_pop_insn = 0xe8bd4040;
343 static const insn32 t2a6_bx_insn = 0xe12fff1e;
346 bfd_elf32_arm_allocate_interworking_sections (info)
347 struct bfd_link_info * info;
351 struct elf32_arm_link_hash_table * globals;
353 globals = elf32_arm_hash_table (info);
355 BFD_ASSERT (globals != NULL);
357 if (globals->arm_glue_size != 0)
359 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
361 s = bfd_get_section_by_name
362 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
364 BFD_ASSERT (s != NULL);
366 foo = (bfd_byte *) bfd_alloc
367 (globals->bfd_of_glue_owner, globals->arm_glue_size);
369 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
373 if (globals->thumb_glue_size != 0)
375 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
377 s = bfd_get_section_by_name
378 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
380 BFD_ASSERT (s != NULL);
382 foo = (bfd_byte *) bfd_alloc
383 (globals->bfd_of_glue_owner, globals->thumb_glue_size);
385 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
393 record_arm_to_thumb_glue (link_info, h)
394 struct bfd_link_info * link_info;
395 struct elf_link_hash_entry * h;
397 const char * name = h->root.root.string;
398 register asection * s;
400 struct elf_link_hash_entry * myh;
401 struct elf32_arm_link_hash_table * globals;
403 globals = elf32_arm_hash_table (link_info);
405 BFD_ASSERT (globals != NULL);
406 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
408 s = bfd_get_section_by_name
409 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
412 BFD_ASSERT (s != NULL);
415 bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
417 BFD_ASSERT (tmp_name);
419 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
421 myh = elf_link_hash_lookup
422 (&(globals)->root, tmp_name, false, false, true);
427 return; /* we've already seen this guy */
430 /* The only trick here is using hash_table->arm_glue_size as the value. Even
431 though the section isn't allocated yet, this is where we will be putting
434 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, tmp_name,
436 s, globals->arm_glue_size + 1,
438 (struct bfd_link_hash_entry **) &myh);
442 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
448 record_thumb_to_arm_glue (link_info, h)
449 struct bfd_link_info *link_info;
450 struct elf_link_hash_entry *h;
452 const char *name = h->root.root.string;
453 register asection *s;
455 struct elf_link_hash_entry *myh;
456 struct elf32_arm_link_hash_table *hash_table;
459 hash_table = elf32_arm_hash_table (link_info);
461 BFD_ASSERT (hash_table != NULL);
462 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
464 s = bfd_get_section_by_name
465 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
467 BFD_ASSERT (s != NULL);
469 tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
471 BFD_ASSERT (tmp_name);
473 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
475 myh = elf_link_hash_lookup
476 (&(hash_table)->root, tmp_name, false, false, true);
481 return; /* we've already seen this guy */
484 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name,
485 BSF_GLOBAL, s, hash_table->thumb_glue_size + 1,
487 (struct bfd_link_hash_entry **) &myh);
489 /* If we mark it 'thumb', the disassembler will do a better job. */
490 bind = ELF_ST_BIND (myh->type);
491 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
495 /* Allocate another symbol to mark where we switch to arm mode. */
497 #define CHANGE_TO_ARM "__%s_change_to_arm"
498 #define BACK_FROM_ARM "__%s_back_from_arm"
500 tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1);
502 BFD_ASSERT (tmp_name);
504 sprintf (tmp_name, CHANGE_TO_ARM, name);
508 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name,
509 BSF_LOCAL, s, hash_table->thumb_glue_size + 4,
511 (struct bfd_link_hash_entry **) &myh);
515 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
520 /* Select a BFD to be used to hold the sections used by the glue code.
521 This function is called from the linker scripts in ld/emultempl/
524 bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
526 struct bfd_link_info *info;
528 struct elf32_arm_link_hash_table *globals;
532 /* If we are only performing a partial link do not bother
533 getting a bfd to hold the glue. */
534 if (info->relocateable)
537 globals = elf32_arm_hash_table (info);
539 BFD_ASSERT (globals != NULL);
541 if (globals->bfd_of_glue_owner != NULL)
544 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
548 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
549 will prevent elf_link_input_bfd() from processing the contents
551 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
553 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
556 || !bfd_set_section_flags (abfd, sec, flags)
557 || !bfd_set_section_alignment (abfd, sec, 2))
560 /* Set the gc mark to prevent the section from being removed by garbage
561 collection, despite the fact that no relocs refer to this section. */
565 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
569 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
571 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
574 || !bfd_set_section_flags (abfd, sec, flags)
575 || !bfd_set_section_alignment (abfd, sec, 2))
581 /* Save the bfd for later use. */
582 globals->bfd_of_glue_owner = abfd;
588 bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
590 struct bfd_link_info *link_info;
591 int no_pipeline_knowledge;
593 Elf_Internal_Shdr *symtab_hdr;
594 Elf_Internal_Rela *free_relocs = NULL;
595 Elf_Internal_Rela *irel, *irelend;
596 bfd_byte *contents = NULL;
597 bfd_byte *free_contents = NULL;
598 Elf32_External_Sym *extsyms = NULL;
599 Elf32_External_Sym *free_extsyms = NULL;
602 struct elf32_arm_link_hash_table *globals;
604 /* If we are only performing a partial link do not bother
605 to construct any glue. */
606 if (link_info->relocateable)
609 /* Here we have a bfd that is to be included on the link. We have a hook
610 to do reloc rummaging, before section sizes are nailed down. */
612 globals = elf32_arm_hash_table (link_info);
614 BFD_ASSERT (globals != NULL);
615 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
617 globals->no_pipeline_knowledge = no_pipeline_knowledge;
619 /* Rummage around all the relocs and map the glue vectors. */
620 sec = abfd->sections;
625 for (; sec != NULL; sec = sec->next)
627 if (sec->reloc_count == 0)
630 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
631 /* Load the relocs. */
633 irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL,
634 (Elf_Internal_Rela *) NULL, false));
636 BFD_ASSERT (irel != 0);
638 irelend = irel + sec->reloc_count;
639 for (; irel < irelend; irel++)
642 unsigned long r_index;
644 struct elf_link_hash_entry *h;
646 r_type = ELF32_R_TYPE (irel->r_info);
647 r_index = ELF32_R_SYM (irel->r_info);
649 /* These are the only relocation types we care about */
650 if ( r_type != R_ARM_PC24
651 && r_type != R_ARM_THM_PC22)
654 /* Get the section contents if we haven't done so already. */
655 if (contents == NULL)
657 /* Get cached copy if it exists. */
658 if (elf_section_data (sec)->this_hdr.contents != NULL)
659 contents = elf_section_data (sec)->this_hdr.contents;
662 /* Go get them off disk. */
663 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
664 if (contents == NULL)
666 free_contents = contents;
668 if (!bfd_get_section_contents (abfd, sec, contents,
669 (file_ptr) 0, sec->_raw_size))
674 /* Read this BFD's symbols if we haven't done so already. */
677 /* Get cached copy if it exists. */
678 if (symtab_hdr->contents != NULL)
679 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
682 /* Go get them off disk. */
683 extsyms = ((Elf32_External_Sym *)
684 bfd_malloc (symtab_hdr->sh_size));
687 free_extsyms = extsyms;
688 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
689 || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
690 != symtab_hdr->sh_size))
695 /* If the relocation is not against a symbol it cannot concern us. */
699 /* We don't care about local symbols */
700 if (r_index < symtab_hdr->sh_info)
703 /* This is an external symbol */
704 r_index -= symtab_hdr->sh_info;
705 h = (struct elf_link_hash_entry *)
706 elf_sym_hashes (abfd)[r_index];
708 /* If the relocation is against a static symbol it must be within
709 the current section and so cannot be a cross ARM/Thumb relocation. */
716 /* This one is a call from arm code. We need to look up
717 the target of the call. If it is a thumb target, we
720 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
721 record_arm_to_thumb_glue (link_info, h);
725 /* This one is a call from thumb code. We look
726 up the target of the call. If it is not a thumb
727 target, we insert glue. */
729 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
730 record_thumb_to_arm_glue (link_info, h);
742 if (free_relocs != NULL)
744 if (free_contents != NULL)
745 free (free_contents);
746 if (free_extsyms != NULL)
752 /* The thumb form of a long branch is a bit finicky, because the offset
753 encoding is split over two fields, each in it's own instruction. They
754 can occur in any order. So given a thumb form of long branch, and an
755 offset, insert the offset into the thumb branch and return finished
758 It takes two thumb instructions to encode the target address. Each has
759 11 bits to invest. The upper 11 bits are stored in one (identifed by
760 H-0.. see below), the lower 11 bits are stored in the other (identified
763 Combine together and shifted left by 1 (it's a half word address) and
767 H-0, upper address-0 = 000
769 H-1, lower address-0 = 800
771 They can be ordered either way, but the arm tools I've seen always put
772 the lower one first. It probably doesn't matter. krk@cygnus.com
774 XXX: Actually the order does matter. The second instruction (H-1)
775 moves the computed address into the PC, so it must be the second one
776 in the sequence. The problem, however is that whilst little endian code
777 stores the instructions in HI then LOW order, big endian code does the
778 reverse. nickc@cygnus.com. */
780 #define LOW_HI_ORDER 0xF800F000
781 #define HI_LOW_ORDER 0xF000F800
784 insert_thumb_branch (br_insn, rel_off)
788 unsigned int low_bits;
789 unsigned int high_bits;
792 BFD_ASSERT ((rel_off & 1) != 1);
794 rel_off >>= 1; /* Half word aligned address. */
795 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
796 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
798 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
799 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
800 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
801 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
803 abort (); /* error - not a valid branch instruction form */
805 /* FIXME: abort is probably not the right call. krk@cygnus.com */
810 /* Thumb code calling an ARM function */
812 elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
813 hit_data, sym_sec, offset, addend, val)
814 struct bfd_link_info * info;
818 asection * input_section;
822 bfd_signed_vma addend;
827 unsigned long int tmp;
829 struct elf_link_hash_entry * myh;
830 struct elf32_arm_link_hash_table * globals;
832 myh = find_thumb_glue (info, name, input_bfd);
836 globals = elf32_arm_hash_table (info);
838 BFD_ASSERT (globals != NULL);
839 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
841 my_offset = myh->root.u.def.value;
843 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
844 THUMB2ARM_GLUE_SECTION_NAME);
846 BFD_ASSERT (s != NULL);
847 BFD_ASSERT (s->contents != NULL);
848 BFD_ASSERT (s->output_section != NULL);
850 if ((my_offset & 0x01) == 0x01)
853 && sym_sec->owner != NULL
854 && !INTERWORK_FLAG (sym_sec->owner))
857 (_ ("%s(%s): warning: interworking not enabled."),
858 bfd_get_filename (sym_sec->owner), name);
860 (_ (" first occurrence: %s: thumb call to arm"),
861 bfd_get_filename (input_bfd));
867 myh->root.u.def.value = my_offset;
869 bfd_put_16 (output_bfd, t2a1_bx_pc_insn,
870 s->contents + my_offset);
872 bfd_put_16 (output_bfd, t2a2_noop_insn,
873 s->contents + my_offset + 2);
876 ((bfd_signed_vma) val) /* Address of destination of the stub */
878 (s->output_offset /* Offset from the start of the current section to the start of the stubs. */
879 + my_offset /* Offset of the start of this stub from the start of the stubs. */
880 + s->output_section->vma) /* Address of the start of the current section. */
881 + 4 /* The branch instruction is 4 bytes into the stub. */
882 + 8); /* ARM branches work from the pc of the instruction + 8. */
884 bfd_put_32 (output_bfd,
885 t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
886 s->contents + my_offset + 4);
889 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
891 /* Now go back and fix up the original BL insn to point
896 - (input_section->output_offset
900 tmp = bfd_get_32 (input_bfd, hit_data
901 - input_section->vma);
903 bfd_put_32 (output_bfd,
904 insert_thumb_branch (tmp, ret_offset),
905 hit_data - input_section->vma);
910 /* Arm code calling a Thumb function */
912 elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
913 hit_data, sym_sec, offset, addend, val)
914 struct bfd_link_info * info;
918 asection * input_section;
922 bfd_signed_vma addend;
925 unsigned long int tmp;
929 struct elf_link_hash_entry * myh;
930 struct elf32_arm_link_hash_table * globals;
932 myh = find_arm_glue (info, name, input_bfd);
936 globals = elf32_arm_hash_table (info);
938 BFD_ASSERT (globals != NULL);
939 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
941 my_offset = myh->root.u.def.value;
942 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
943 ARM2THUMB_GLUE_SECTION_NAME);
944 BFD_ASSERT (s != NULL);
945 BFD_ASSERT (s->contents != NULL);
946 BFD_ASSERT (s->output_section != NULL);
948 if ((my_offset & 0x01) == 0x01)
951 && sym_sec->owner != NULL
952 && !INTERWORK_FLAG (sym_sec->owner))
955 (_ ("%s(%s): warning: interworking not enabled."),
956 bfd_get_filename (sym_sec->owner), name);
958 (_ (" first occurrence: %s: arm call to thumb"),
959 bfd_get_filename (input_bfd));
962 myh->root.u.def.value = my_offset;
964 bfd_put_32 (output_bfd, a2t1_ldr_insn,
965 s->contents + my_offset);
967 bfd_put_32 (output_bfd, a2t2_bx_r12_insn,
968 s->contents + my_offset + 4);
970 /* It's a thumb address. Add the low order bit. */
971 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
972 s->contents + my_offset + 8);
975 BFD_ASSERT (my_offset <= globals->arm_glue_size);
977 tmp = bfd_get_32 (input_bfd, hit_data);
978 tmp = tmp & 0xFF000000;
980 /* Somehow these are both 4 too far, so subtract 8. */
981 ret_offset = s->output_offset
983 + s->output_section->vma
984 - (input_section->output_offset
985 + input_section->output_section->vma
989 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
991 bfd_put_32 (output_bfd, tmp, hit_data
992 - input_section->vma);
997 /* Perform a relocation as part of a final link. */
998 static bfd_reloc_status_type
999 elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1000 input_section, contents, rel, value,
1001 info, sym_sec, sym_name, sym_flags, h)
1002 reloc_howto_type * howto;
1005 asection * input_section;
1006 bfd_byte * contents;
1007 Elf_Internal_Rela * rel;
1009 struct bfd_link_info * info;
1011 const char * sym_name;
1012 unsigned char sym_flags;
1013 struct elf_link_hash_entry * h;
1015 unsigned long r_type = howto->type;
1016 unsigned long r_symndx;
1017 bfd_byte * hit_data = contents + rel->r_offset;
1018 bfd * dynobj = NULL;
1019 Elf_Internal_Shdr * symtab_hdr;
1020 struct elf_link_hash_entry ** sym_hashes;
1021 bfd_vma * local_got_offsets;
1022 asection * sgot = NULL;
1023 asection * splt = NULL;
1024 asection * sreloc = NULL;
1026 bfd_signed_vma signed_addend;
1027 struct elf32_arm_link_hash_table * globals;
1029 globals = elf32_arm_hash_table (info);
1031 dynobj = elf_hash_table (info)->dynobj;
1034 sgot = bfd_get_section_by_name (dynobj, ".got");
1035 splt = bfd_get_section_by_name (dynobj, ".plt");
1037 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1038 sym_hashes = elf_sym_hashes (input_bfd);
1039 local_got_offsets = elf_local_got_offsets (input_bfd);
1040 r_symndx = ELF32_R_SYM (rel->r_info);
1043 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1045 if (addend & ((howto->src_mask + 1) >> 1))
1048 signed_addend &= ~ howto->src_mask;
1049 signed_addend |= addend;
1052 signed_addend = addend;
1054 addend = signed_addend = rel->r_addend;
1060 return bfd_reloc_ok;
1068 /* When generating a shared object, these relocations are copied
1069 into the output file to be resolved at run time. */
1072 && (r_type != R_ARM_PC24
1075 && (! info->symbolic
1076 || (h->elf_link_hash_flags
1077 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1079 Elf_Internal_Rel outrel;
1080 boolean skip, relocate;
1086 name = (bfd_elf_string_from_elf_section
1088 elf_elfheader (input_bfd)->e_shstrndx,
1089 elf_section_data (input_section)->rel_hdr.sh_name));
1091 return bfd_reloc_notsupported;
1093 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1094 && strcmp (bfd_get_section_name (input_bfd,
1098 sreloc = bfd_get_section_by_name (dynobj, name);
1099 BFD_ASSERT (sreloc != NULL);
1104 if (elf_section_data (input_section)->stab_info == NULL)
1105 outrel.r_offset = rel->r_offset;
1110 off = (_bfd_stab_section_offset
1111 (output_bfd, &elf_hash_table (info)->stab_info,
1113 & elf_section_data (input_section)->stab_info,
1115 if (off == (bfd_vma) -1)
1117 outrel.r_offset = off;
1120 outrel.r_offset += (input_section->output_section->vma
1121 + input_section->output_offset);
1125 memset (&outrel, 0, sizeof outrel);
1128 else if (r_type == R_ARM_PC24)
1130 BFD_ASSERT (h != NULL && h->dynindx != -1);
1131 if ((input_section->flags & SEC_ALLOC) != 0)
1135 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24);
1140 || ((info->symbolic || h->dynindx == -1)
1141 && (h->elf_link_hash_flags
1142 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1145 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1149 BFD_ASSERT (h->dynindx != -1);
1150 if ((input_section->flags & SEC_ALLOC) != 0)
1154 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32);
1158 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1159 (((Elf32_External_Rel *)
1161 + sreloc->reloc_count));
1162 ++sreloc->reloc_count;
1164 /* If this reloc is against an external symbol, we do not want to
1165 fiddle with the addend. Otherwise, we need to include the symbol
1166 value so that it becomes an addend for the dynamic reloc. */
1168 return bfd_reloc_ok;
1171 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1172 contents, rel->r_offset, value,
1175 else switch (r_type)
1178 case R_ARM_XPC25: /* Arm BLX instruction. */
1180 case R_ARM_PC24: /* Arm B/BL instruction */
1182 if (r_type == R_ARM_XPC25)
1184 /* Check for Arm calling Arm function. */
1185 /* FIXME: Should we translate the instruction into a BL
1186 instruction instead ? */
1187 if (sym_flags != STT_ARM_TFUNC)
1188 _bfd_error_handler (_("\
1189 %s: Warning: Arm BLX instruction targets Arm function '%s'."),
1190 bfd_get_filename (input_bfd),
1191 h ? h->root.root.string : "(local)");
1196 /* Check for Arm calling Thumb function. */
1197 if (sym_flags == STT_ARM_TFUNC)
1199 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1200 input_section, hit_data, sym_sec, rel->r_offset,
1201 signed_addend, value);
1202 return bfd_reloc_ok;
1206 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1207 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1209 /* The old way of doing things. Trearing the addend as a
1210 byte sized field and adding in the pipeline offset. */
1212 value -= (input_section->output_section->vma
1213 + input_section->output_offset);
1214 value -= rel->r_offset;
1217 if (! globals->no_pipeline_knowledge)
1222 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1224 S is the address of the symbol in the relocation.
1225 P is address of the instruction being relocated.
1226 A is the addend (extracted from the instruction) in bytes.
1228 S is held in 'value'.
1229 P is the base address of the section containing the instruction
1230 plus the offset of the reloc into that section, ie:
1231 (input_section->output_section->vma +
1232 input_section->output_offset +
1234 A is the addend, converted into bytes, ie:
1237 Note: None of these operations have knowledge of the pipeline
1238 size of the processor, thus it is up to the assembler to encode
1239 this information into the addend. */
1241 value -= (input_section->output_section->vma
1242 + input_section->output_offset);
1243 value -= rel->r_offset;
1244 value += (signed_addend << howto->size);
1246 /* Previous versions of this code also used to add in the pipeline
1247 offset here. This is wrong because the linker is not supposed
1248 to know about such things, and one day it might change. In order
1249 to support old binaries that need the old behaviour however, so
1250 we attempt to detect which ABI was used to create the reloc. */
1251 if (! globals->no_pipeline_knowledge)
1253 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
1255 i_ehdrp = elf_elfheader (input_bfd);
1257 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1262 /* Perform a signed range check. */
1263 signed_addend = value;
1264 signed_addend >>= howto->rightshift;
1266 /* It is not an error for an undefined weak reference to be
1267 out of range. Any program that branches to such a symbol
1268 is going to crash anyway, so there is no point worrying
1269 about getting the destination exactly right. */
1270 if (! h || h->root.type != bfd_link_hash_undefweak)
1272 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
1273 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1274 return bfd_reloc_overflow;
1278 /* If necessary set the H bit in the BLX instruction. */
1279 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1280 value = (signed_addend & howto->dst_mask)
1281 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1285 value = (signed_addend & howto->dst_mask)
1286 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
1291 if (sym_flags == STT_ARM_TFUNC)
1296 value -= (input_section->output_section->vma
1297 + input_section->output_offset);
1302 bfd_put_32 (input_bfd, value, hit_data);
1303 return bfd_reloc_ok;
1307 if ((long) value > 0x7f || (long) value < -0x80)
1308 return bfd_reloc_overflow;
1310 bfd_put_8 (input_bfd, value, hit_data);
1311 return bfd_reloc_ok;
1316 if ((long) value > 0x7fff || (long) value < -0x8000)
1317 return bfd_reloc_overflow;
1319 bfd_put_16 (input_bfd, value, hit_data);
1320 return bfd_reloc_ok;
1323 /* Support ldr and str instruction for the arm */
1324 /* Also thumb b (unconditional branch). ??? Really? */
1327 if ((long) value > 0x7ff || (long) value < -0x800)
1328 return bfd_reloc_overflow;
1330 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1331 bfd_put_32 (input_bfd, value, hit_data);
1332 return bfd_reloc_ok;
1334 case R_ARM_THM_ABS5:
1335 /* Support ldr and str instructions for the thumb. */
1337 /* Need to refetch addend. */
1338 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1339 /* ??? Need to determine shift amount from operand size. */
1340 addend >>= howto->rightshift;
1344 /* ??? Isn't value unsigned? */
1345 if ((long) value > 0x1f || (long) value < -0x10)
1346 return bfd_reloc_overflow;
1348 /* ??? Value needs to be properly shifted into place first. */
1349 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1350 bfd_put_16 (input_bfd, value, hit_data);
1351 return bfd_reloc_ok;
1354 case R_ARM_THM_XPC22:
1356 case R_ARM_THM_PC22:
1357 /* Thumb BL (branch long instruction). */
1360 boolean overflow = false;
1361 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1362 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
1363 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1364 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1366 bfd_signed_vma signed_check;
1369 /* Need to refetch the addend and squish the two 11 bit pieces
1372 bfd_vma upper = upper_insn & 0x7ff;
1373 bfd_vma lower = lower_insn & 0x7ff;
1374 upper = (upper ^ 0x400) - 0x400; /* sign extend */
1375 addend = (upper << 12) | (lower << 1);
1376 signed_addend = addend;
1380 if (r_type == R_ARM_THM_XPC22)
1382 /* Check for Thumb to Thumb call. */
1383 /* FIXME: Should we translate the instruction into a BL
1384 instruction instead ? */
1385 if (sym_flags == STT_ARM_TFUNC)
1386 _bfd_error_handler (_("\
1387 %s: Warning: Thumb BLX instruction targets thumb function '%s'."),
1388 bfd_get_filename (input_bfd),
1389 h ? h->root.root.string : "(local)");
1394 /* If it is not a call to Thumb, assume call to Arm.
1395 If it is a call relative to a section name, then it is not a
1396 function call at all, but rather a long jump. */
1397 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1399 if (elf32_thumb_to_arm_stub
1400 (info, sym_name, input_bfd, output_bfd, input_section,
1401 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1402 return bfd_reloc_ok;
1404 return bfd_reloc_dangerous;
1408 relocation = value + signed_addend;
1410 relocation -= (input_section->output_section->vma
1411 + input_section->output_offset
1414 if (! globals->no_pipeline_knowledge)
1416 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
1418 i_ehdrp = elf_elfheader (input_bfd);
1420 /* Previous versions of this code also used to add in the pipline
1421 offset here. This is wrong because the linker is not supposed
1422 to know about such things, and one day it might change. In order
1423 to support old binaries that need the old behaviour however, so
1424 we attempt to detect which ABI was used to create the reloc. */
1425 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1426 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1427 || i_ehdrp->e_ident[EI_OSABI] == 0)
1431 check = relocation >> howto->rightshift;
1433 /* If this is a signed value, the rightshift just dropped
1434 leading 1 bits (assuming twos complement). */
1435 if ((bfd_signed_vma) relocation >= 0)
1436 signed_check = check;
1438 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1440 /* Assumes two's complement. */
1441 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
1444 /* Put RELOCATION back into the insn. */
1445 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1446 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1448 /* Put the relocated value back in the object file: */
1449 bfd_put_16 (input_bfd, upper_insn, hit_data);
1450 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1452 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1456 case R_ARM_GNU_VTINHERIT:
1457 case R_ARM_GNU_VTENTRY:
1458 return bfd_reloc_ok;
1461 return bfd_reloc_notsupported;
1463 case R_ARM_GLOB_DAT:
1464 return bfd_reloc_notsupported;
1466 case R_ARM_JUMP_SLOT:
1467 return bfd_reloc_notsupported;
1469 case R_ARM_RELATIVE:
1470 return bfd_reloc_notsupported;
1473 /* Relocation is relative to the start of the
1474 global offset table. */
1476 BFD_ASSERT (sgot != NULL);
1478 return bfd_reloc_notsupported;
1480 /* Note that sgot->output_offset is not involved in this
1481 calculation. We always want the start of .got. If we
1482 define _GLOBAL_OFFSET_TABLE in a different way, as is
1483 permitted by the ABI, we might have to change this
1486 value -= sgot->output_section->vma;
1487 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1488 contents, rel->r_offset, value,
1492 /* Use global offset table as symbol value. */
1494 BFD_ASSERT (sgot != NULL);
1497 return bfd_reloc_notsupported;
1499 value = sgot->output_section->vma;
1500 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1501 contents, rel->r_offset, value,
1505 /* Relocation is to the entry for this symbol in the
1506 global offset table. */
1508 return bfd_reloc_notsupported;
1514 off = h->got.offset;
1515 BFD_ASSERT (off != (bfd_vma) -1);
1517 if (!elf_hash_table (info)->dynamic_sections_created ||
1518 (info->shared && (info->symbolic || h->dynindx == -1)
1519 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1521 /* This is actually a static link, or it is a -Bsymbolic link
1522 and the symbol is defined locally. We must initialize this
1523 entry in the global offset table. Since the offset must
1524 always be a multiple of 4, we use the least significant bit
1525 to record whether we have initialized it already.
1527 When doing a dynamic link, we create a .rel.got relocation
1528 entry to initialize the value. This is done in the
1529 finish_dynamic_symbol routine. */
1535 bfd_put_32 (output_bfd, value, sgot->contents + off);
1540 value = sgot->output_offset + off;
1546 BFD_ASSERT (local_got_offsets != NULL &&
1547 local_got_offsets[r_symndx] != (bfd_vma) -1);
1549 off = local_got_offsets[r_symndx];
1551 /* The offset must always be a multiple of 4. We use the
1552 least significant bit to record whether we have already
1553 generated the necessary reloc. */
1558 bfd_put_32 (output_bfd, value, sgot->contents + off);
1563 Elf_Internal_Rel outrel;
1565 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1566 BFD_ASSERT (srelgot != NULL);
1568 outrel.r_offset = (sgot->output_section->vma
1569 + sgot->output_offset
1571 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1572 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1573 (((Elf32_External_Rel *)
1575 + srelgot->reloc_count));
1576 ++srelgot->reloc_count;
1579 local_got_offsets[r_symndx] |= 1;
1582 value = sgot->output_offset + off;
1585 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1586 contents, rel->r_offset, value,
1590 /* Relocation is to the entry for this symbol in the
1591 procedure linkage table. */
1593 /* Resolve a PLT32 reloc against a local symbol directly,
1594 without using the procedure linkage table. */
1596 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1597 contents, rel->r_offset, value,
1600 if (h->plt.offset == (bfd_vma) -1)
1601 /* We didn't make a PLT entry for this symbol. This
1602 happens when statically linking PIC code, or when
1603 using -Bsymbolic. */
1604 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1605 contents, rel->r_offset, value,
1608 BFD_ASSERT(splt != NULL);
1610 return bfd_reloc_notsupported;
1612 value = (splt->output_section->vma
1613 + splt->output_offset
1615 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1616 contents, rel->r_offset, value,
1620 return bfd_reloc_notsupported;
1622 case R_ARM_AMP_VCALL9:
1623 return bfd_reloc_notsupported;
1625 case R_ARM_RSBREL32:
1626 return bfd_reloc_notsupported;
1628 case R_ARM_THM_RPC22:
1629 return bfd_reloc_notsupported;
1632 return bfd_reloc_notsupported;
1635 return bfd_reloc_notsupported;
1638 return bfd_reloc_notsupported;
1641 return bfd_reloc_notsupported;
1644 return bfd_reloc_notsupported;
1649 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1651 arm_add_to_rel (abfd, address, howto, increment)
1654 reloc_howto_type * howto;
1655 bfd_signed_vma increment;
1658 bfd_signed_vma addend;
1660 contents = bfd_get_32 (abfd, address);
1662 /* Get the (signed) value from the instruction. */
1663 addend = contents & howto->src_mask;
1664 if (addend & ((howto->src_mask + 1) >> 1))
1666 bfd_signed_vma mask;
1669 mask &= ~ howto->src_mask;
1673 /* Add in the increment, (which is a byte value). */
1674 switch (howto->type)
1676 case R_ARM_THM_PC22:
1678 addend += increment;
1682 addend <<= howto->size;
1683 addend += increment;
1685 /* Should we check for overflow here ? */
1687 /* Drop any undesired bits. */
1688 addend >>= howto->rightshift;
1692 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1694 bfd_put_32 (abfd, contents, address);
1696 #endif /* USE_REL */
1698 /* Relocate an ARM ELF section. */
1700 elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1701 contents, relocs, local_syms, local_sections)
1703 struct bfd_link_info * info;
1705 asection * input_section;
1706 bfd_byte * contents;
1707 Elf_Internal_Rela * relocs;
1708 Elf_Internal_Sym * local_syms;
1709 asection ** local_sections;
1711 Elf_Internal_Shdr * symtab_hdr;
1712 struct elf_link_hash_entry ** sym_hashes;
1713 Elf_Internal_Rela * rel;
1714 Elf_Internal_Rela * relend;
1717 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1718 sym_hashes = elf_sym_hashes (input_bfd);
1721 relend = relocs + input_section->reloc_count;
1722 for (; rel < relend; rel++)
1725 reloc_howto_type * howto;
1726 unsigned long r_symndx;
1727 Elf_Internal_Sym * sym;
1729 struct elf_link_hash_entry * h;
1731 bfd_reloc_status_type r;
1734 r_symndx = ELF32_R_SYM (rel->r_info);
1735 r_type = ELF32_R_TYPE (rel->r_info);
1737 if ( r_type == R_ARM_GNU_VTENTRY
1738 || r_type == R_ARM_GNU_VTINHERIT)
1741 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1742 howto = bfd_reloc.howto;
1744 if (info->relocateable)
1746 /* This is a relocateable link. We don't have to change
1747 anything, unless the reloc is against a section symbol,
1748 in which case we have to adjust according to where the
1749 section symbol winds up in the output section. */
1750 if (r_symndx < symtab_hdr->sh_info)
1752 sym = local_syms + r_symndx;
1753 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1755 sec = local_sections[r_symndx];
1757 arm_add_to_rel (input_bfd, contents + rel->r_offset,
1758 howto, sec->output_offset + sym->st_value);
1760 rel->r_addend += (sec->output_offset + sym->st_value)
1761 >> howto->rightshift;
1769 /* This is a final link. */
1773 if (r_symndx < symtab_hdr->sh_info)
1775 sym = local_syms + r_symndx;
1776 sec = local_sections[r_symndx];
1777 relocation = (sec->output_section->vma
1778 + sec->output_offset
1783 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1784 while (h->root.type == bfd_link_hash_indirect
1785 || h->root.type == bfd_link_hash_warning)
1786 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1787 if (h->root.type == bfd_link_hash_defined
1788 || h->root.type == bfd_link_hash_defweak)
1790 int relocation_needed = 1;
1792 sec = h->root.u.def.section;
1794 /* In these cases, we don't need the relocation value.
1795 We check specially because in some obscure cases
1796 sec->output_section will be NULL. */
1803 (!info->symbolic && h->dynindx != -1)
1804 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1806 && ((input_section->flags & SEC_ALLOC) != 0)
1808 relocation_needed = 0;
1812 relocation_needed = 0;
1816 if (elf_hash_table(info)->dynamic_sections_created
1818 || (!info->symbolic && h->dynindx != -1)
1819 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1822 relocation_needed = 0;
1826 if (h->plt.offset != (bfd_vma)-1)
1827 relocation_needed = 0;
1831 if (sec->output_section == NULL)
1833 (*_bfd_error_handler)
1834 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1835 bfd_get_filename (input_bfd), h->root.root.string,
1836 bfd_get_section_name (input_bfd, input_section));
1837 relocation_needed = 0;
1841 if (relocation_needed)
1842 relocation = h->root.u.def.value
1843 + sec->output_section->vma
1844 + sec->output_offset;
1848 else if (h->root.type == bfd_link_hash_undefweak)
1850 else if (info->shared && !info->symbolic
1851 && !info->no_undefined
1852 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1856 if (!((*info->callbacks->undefined_symbol)
1857 (info, h->root.root.string, input_bfd,
1858 input_section, rel->r_offset,
1859 (!info->shared || info->no_undefined
1860 || ELF_ST_VISIBILITY (h->other)))))
1867 name = h->root.root.string;
1870 name = (bfd_elf_string_from_elf_section
1871 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1872 if (name == NULL || *name == '\0')
1873 name = bfd_section_name (input_bfd, sec);
1876 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1877 input_section, contents, rel,
1878 relocation, info, sec, name,
1879 (h ? ELF_ST_TYPE (h->type) :
1880 ELF_ST_TYPE (sym->st_info)), h);
1882 if (r != bfd_reloc_ok)
1884 const char * msg = (const char *) 0;
1888 case bfd_reloc_overflow:
1889 if (!((*info->callbacks->reloc_overflow)
1890 (info, name, howto->name, (bfd_vma) 0,
1891 input_bfd, input_section, rel->r_offset)))
1895 case bfd_reloc_undefined:
1896 if (!((*info->callbacks->undefined_symbol)
1897 (info, name, input_bfd, input_section,
1898 rel->r_offset, true)))
1902 case bfd_reloc_outofrange:
1903 msg = _ ("internal error: out of range error");
1906 case bfd_reloc_notsupported:
1907 msg = _ ("internal error: unsupported relocation error");
1910 case bfd_reloc_dangerous:
1911 msg = _ ("internal error: dangerous error");
1915 msg = _ ("internal error: unknown error");
1919 if (!((*info->callbacks->warning)
1920 (info, msg, name, input_bfd, input_section,
1931 /* Function to keep ARM specific flags in the ELF header. */
1933 elf32_arm_set_private_flags (abfd, flags)
1937 if (elf_flags_init (abfd)
1938 && elf_elfheader (abfd)->e_flags != flags)
1940 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
1942 if (flags & EF_INTERWORK)
1943 _bfd_error_handler (_ ("\
1944 Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
1945 bfd_get_filename (abfd));
1947 _bfd_error_handler (_ ("\
1948 Warning: Clearing the interwork flag of %s due to outside request"),
1949 bfd_get_filename (abfd));
1954 elf_elfheader (abfd)->e_flags = flags;
1955 elf_flags_init (abfd) = true;
1961 /* Copy backend specific data from one object module to another. */
1963 elf32_arm_copy_private_bfd_data (ibfd, obfd)
1970 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1971 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1974 in_flags = elf_elfheader (ibfd)->e_flags;
1975 out_flags = elf_elfheader (obfd)->e_flags;
1977 if (elf_flags_init (obfd)
1978 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
1979 && in_flags != out_flags)
1981 /* Cannot mix PIC and non-PIC code. */
1982 if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
1985 /* Cannot mix APCS26 and APCS32 code. */
1986 if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
1989 /* Cannot mix float APCS and non-float APCS code. */
1990 if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
1993 /* If the src and dest have different interworking flags
1994 then turn off the interworking bit. */
1995 if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
1997 if (out_flags & EF_INTERWORK)
1998 _bfd_error_handler (_ ("\
1999 Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
2000 bfd_get_filename (obfd), bfd_get_filename (ibfd));
2002 in_flags &= ~EF_INTERWORK;
2006 elf_elfheader (obfd)->e_flags = in_flags;
2007 elf_flags_init (obfd) = true;
2012 /* Merge backend specific data from an object file to the output
2013 object file when linking. */
2015 elf32_arm_merge_private_bfd_data (ibfd, obfd)
2022 /* Check if we have the same endianess */
2023 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2026 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2027 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2030 /* The input BFD must have had its flags initialised. */
2031 /* The following seems bogus to me -- The flags are initialized in
2032 the assembler but I don't think an elf_flags_init field is
2033 written into the object */
2034 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2036 in_flags = elf_elfheader (ibfd)->e_flags;
2037 out_flags = elf_elfheader (obfd)->e_flags;
2039 if (!elf_flags_init (obfd))
2041 /* If the input is the default architecture then do not
2042 bother setting the flags for the output architecture,
2043 instead allow future merges to do this. If no future
2044 merges ever set these flags then they will retain their
2045 unitialised values, which surprise surprise, correspond
2046 to the default values. */
2047 if (bfd_get_arch_info (ibfd)->the_default)
2050 elf_flags_init (obfd) = true;
2051 elf_elfheader (obfd)->e_flags = in_flags;
2053 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2054 && bfd_get_arch_info (obfd)->the_default)
2055 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2060 /* Check flag compatibility. */
2061 if (in_flags == out_flags)
2064 /* Complain about various flag mismatches. */
2065 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2067 _bfd_error_handler (_("\
2068 Error: %s compiled for EABI version %d, whereas %s is compiled for version %d"),
2069 bfd_get_filename (ibfd),
2070 (in_flags & EF_ARM_EABIMASK) >> 24,
2071 bfd_get_filename (obfd),
2072 (out_flags & EF_ARM_EABIMASK) >> 24);
2074 else if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_UNKNOWN)
2075 /* Not sure what needs to be checked for EABI versions >= 1. */
2078 if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
2079 _bfd_error_handler (_ ("\
2080 Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
2081 bfd_get_filename (ibfd),
2082 in_flags & EF_APCS_26 ? 26 : 32,
2083 bfd_get_filename (obfd),
2084 out_flags & EF_APCS_26 ? 26 : 32);
2086 if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
2087 _bfd_error_handler (_ ("\
2088 Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
2089 bfd_get_filename (ibfd),
2090 in_flags & EF_APCS_FLOAT ? _ ("float") : _ ("integer"),
2091 bfd_get_filename (obfd),
2092 out_flags & EF_APCS_26 ? _ ("float") : _ ("integer"));
2094 if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
2095 _bfd_error_handler (_ ("\
2096 Error: %s is compiled as position %s code, whereas %s is not"),
2097 bfd_get_filename (ibfd),
2098 in_flags & EF_PIC ? _ ("independent") : _ ("dependent"),
2099 bfd_get_filename (obfd));
2101 /* Interworking mismatch is only a warning. */
2102 if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
2104 _bfd_error_handler (_ ("\
2105 Warning: %s %s interworking, whereas %s %s"),
2106 bfd_get_filename (ibfd),
2107 in_flags & EF_INTERWORK ? _ ("supports") : _ ("does not support"),
2108 bfd_get_filename (obfd),
2109 out_flags & EF_INTERWORK ? _ ("does not") : _ ("does"));
2116 /* Display the flags field */
2118 elf32_arm_print_private_bfd_data (abfd, ptr)
2122 FILE * file = (FILE *) ptr;
2123 unsigned long flags;
2125 BFD_ASSERT (abfd != NULL && ptr != NULL);
2127 /* Print normal ELF private data. */
2128 _bfd_elf_print_private_bfd_data (abfd, ptr);
2130 flags = elf_elfheader (abfd)->e_flags;
2131 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
2133 /* xgettext:c-format */
2134 fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2136 switch (EF_ARM_EABI_VERSION (flags))
2138 case EF_ARM_EABI_UNKNOWN:
2139 /* The following flag bits are GNU extenstions and not part of the
2140 official ARM ELF extended ABI. Hence they are only decoded if
2141 the EABI version is not set. */
2142 if (flags & EF_INTERWORK)
2143 fprintf (file, _ (" [interworking enabled]"));
2145 if (flags & EF_APCS_26)
2146 fprintf (file, _ (" [APCS-26]"));
2148 fprintf (file, _ (" [APCS-32]"));
2150 if (flags & EF_APCS_FLOAT)
2151 fprintf (file, _ (" [floats passed in float registers]"));
2154 fprintf (file, _ (" [position independent]"));
2156 if (flags & EF_NEW_ABI)
2157 fprintf (file, _ (" [new ABI]"));
2159 if (flags & EF_OLD_ABI)
2160 fprintf (file, _ (" [old ABI]"));
2162 if (flags & EF_SOFT_FLOAT)
2163 fprintf (file, _ (" [software FP]"));
2165 flags &= ~(EF_INTERWORK | EF_APCS_26 | EF_APCS_FLOAT | EF_PIC
2166 | EF_NEW_ABI | EF_OLD_ABI | EF_SOFT_FLOAT);
2169 case EF_ARM_EABI_VER1:
2170 fprintf (file, _ (" [Version1 EABI]"));
2172 if (flags & EF_ARM_SYMSARESORTED)
2173 fprintf (file, _ (" [sorted symbol table]"));
2175 fprintf (file, _ (" [unsorted symbol table]"));
2177 flags &= ~ EF_ARM_SYMSARESORTED;
2181 fprintf (file, _ (" <EABI version unrecognised>"));
2185 flags &= ~ EF_ARM_EABIMASK;
2187 if (flags & EF_ARM_RELEXEC)
2188 fprintf (file, _ (" [relocatable executable]"));
2190 if (flags & EF_ARM_HASENTRY)
2191 fprintf (file, _ (" [has entry point]"));
2193 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2196 fprintf (file, _ ("<Unrecognised flag bits set>"));
2204 elf32_arm_get_symbol_type (elf_sym, type)
2205 Elf_Internal_Sym * elf_sym;
2208 switch (ELF_ST_TYPE (elf_sym->st_info))
2211 return ELF_ST_TYPE (elf_sym->st_info);
2214 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2215 This allows us to distinguish between data used by Thumb instructions
2216 and non-data (which is probably code) inside Thumb regions of an
2218 if (type != STT_OBJECT)
2219 return ELF_ST_TYPE (elf_sym->st_info);
2230 elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2232 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2233 Elf_Internal_Rela *rel;
2234 struct elf_link_hash_entry *h;
2235 Elf_Internal_Sym *sym;
2239 switch (ELF32_R_TYPE (rel->r_info))
2241 case R_ARM_GNU_VTINHERIT:
2242 case R_ARM_GNU_VTENTRY:
2246 switch (h->root.type)
2248 case bfd_link_hash_defined:
2249 case bfd_link_hash_defweak:
2250 return h->root.u.def.section;
2252 case bfd_link_hash_common:
2253 return h->root.u.c.p->section;
2262 if (!(elf_bad_symtab (abfd)
2263 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
2264 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
2265 && sym->st_shndx != SHN_COMMON))
2267 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2273 /* Update the got entry reference counts for the section being removed. */
2276 elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
2277 bfd *abfd ATTRIBUTE_UNUSED;
2278 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2279 asection *sec ATTRIBUTE_UNUSED;
2280 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
2282 /* We don't support garbage collection of GOT and PLT relocs yet. */
2286 /* Look through the relocs for a section during the first phase. */
2289 elf32_arm_check_relocs (abfd, info, sec, relocs)
2291 struct bfd_link_info * info;
2293 const Elf_Internal_Rela * relocs;
2295 Elf_Internal_Shdr * symtab_hdr;
2296 struct elf_link_hash_entry ** sym_hashes;
2297 struct elf_link_hash_entry ** sym_hashes_end;
2298 const Elf_Internal_Rela * rel;
2299 const Elf_Internal_Rela * rel_end;
2301 asection * sgot, *srelgot, *sreloc;
2302 bfd_vma * local_got_offsets;
2304 if (info->relocateable)
2307 sgot = srelgot = sreloc = NULL;
2309 dynobj = elf_hash_table (info)->dynobj;
2310 local_got_offsets = elf_local_got_offsets (abfd);
2312 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2313 sym_hashes = elf_sym_hashes (abfd);
2314 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
2315 if (!elf_bad_symtab (abfd))
2316 sym_hashes_end -= symtab_hdr->sh_info;
2318 rel_end = relocs + sec->reloc_count;
2319 for (rel = relocs; rel < rel_end; rel++)
2321 struct elf_link_hash_entry *h;
2322 unsigned long r_symndx;
2324 r_symndx = ELF32_R_SYM (rel->r_info);
2325 if (r_symndx < symtab_hdr->sh_info)
2328 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2330 /* Some relocs require a global offset table. */
2333 switch (ELF32_R_TYPE (rel->r_info))
2338 elf_hash_table (info)->dynobj = dynobj = abfd;
2339 if (! _bfd_elf_create_got_section (dynobj, info))
2348 switch (ELF32_R_TYPE (rel->r_info))
2351 /* This symbol requires a global offset table entry. */
2354 sgot = bfd_get_section_by_name (dynobj, ".got");
2355 BFD_ASSERT (sgot != NULL);
2358 /* Get the got relocation section if necessary. */
2360 && (h != NULL || info->shared))
2362 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2364 /* If no got relocation section, make one and initialize. */
2365 if (srelgot == NULL)
2367 srelgot = bfd_make_section (dynobj, ".rel.got");
2369 || ! bfd_set_section_flags (dynobj, srelgot,
2374 | SEC_LINKER_CREATED
2376 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2383 if (h->got.offset != (bfd_vma) -1)
2384 /* We have already allocated space in the .got. */
2387 h->got.offset = sgot->_raw_size;
2389 /* Make sure this symbol is output as a dynamic symbol. */
2390 if (h->dynindx == -1)
2391 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2394 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2398 /* This is a global offset table entry for a local
2400 if (local_got_offsets == NULL)
2403 register unsigned int i;
2405 size = symtab_hdr->sh_info * sizeof (bfd_vma);
2406 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2407 if (local_got_offsets == NULL)
2409 elf_local_got_offsets (abfd) = local_got_offsets;
2410 for (i = 0; i < symtab_hdr->sh_info; i++)
2411 local_got_offsets[i] = (bfd_vma) -1;
2414 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2415 /* We have already allocated space in the .got. */
2418 local_got_offsets[r_symndx] = sgot->_raw_size;
2421 /* If we are generating a shared object, we need to
2422 output a R_ARM_RELATIVE reloc so that the dynamic
2423 linker can adjust this GOT entry. */
2424 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2427 sgot->_raw_size += 4;
2431 /* This symbol requires a procedure linkage table entry. We
2432 actually build the entry in adjust_dynamic_symbol,
2433 because this might be a case of linking PIC code which is
2434 never referenced by a dynamic object, in which case we
2435 don't need to generate a procedure linkage table entry
2438 /* If this is a local symbol, we resolve it directly without
2439 creating a procedure linkage table entry. */
2443 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2449 /* If we are creating a shared library, and this is a reloc
2450 against a global symbol, or a non PC relative reloc
2451 against a local symbol, then we need to copy the reloc
2452 into the shared library. However, if we are linking with
2453 -Bsymbolic, we do not need to copy a reloc against a
2454 global symbol which is defined in an object we are
2455 including in the link (i.e., DEF_REGULAR is set). At
2456 this point we have not seen all the input files, so it is
2457 possible that DEF_REGULAR is not set now but will be set
2458 later (it is never cleared). We account for that
2459 possibility below by storing information in the
2460 pcrel_relocs_copied field of the hash table entry. */
2462 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2464 && (! info->symbolic
2465 || (h->elf_link_hash_flags
2466 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2468 /* When creating a shared object, we must copy these
2469 reloc types into the output file. We create a reloc
2470 section in dynobj and make room for this reloc. */
2475 name = (bfd_elf_string_from_elf_section
2477 elf_elfheader (abfd)->e_shstrndx,
2478 elf_section_data (sec)->rel_hdr.sh_name));
2482 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2483 && strcmp (bfd_get_section_name (abfd, sec),
2486 sreloc = bfd_get_section_by_name (dynobj, name);
2491 sreloc = bfd_make_section (dynobj, name);
2492 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2493 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2494 if ((sec->flags & SEC_ALLOC) != 0)
2495 flags |= SEC_ALLOC | SEC_LOAD;
2497 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2498 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2503 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2504 /* If we are linking with -Bsymbolic, and this is a
2505 global symbol, we count the number of PC relative
2506 relocations we have entered for this symbol, so that
2507 we can discard them again if the symbol is later
2508 defined by a regular object. Note that this function
2509 is only called if we are using an elf_i386 linker
2510 hash table, which means that h is really a pointer to
2511 an elf_i386_link_hash_entry. */
2512 if (h != NULL && info->symbolic
2513 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2515 struct elf32_arm_link_hash_entry * eh;
2516 struct elf32_arm_pcrel_relocs_copied * p;
2518 eh = (struct elf32_arm_link_hash_entry *) h;
2520 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2521 if (p->section == sreloc)
2526 p = ((struct elf32_arm_pcrel_relocs_copied *)
2527 bfd_alloc (dynobj, sizeof * p));
2531 p->next = eh->pcrel_relocs_copied;
2532 eh->pcrel_relocs_copied = p;
2533 p->section = sreloc;
2542 /* This relocation describes the C++ object vtable hierarchy.
2543 Reconstruct it for later use during GC. */
2544 case R_ARM_GNU_VTINHERIT:
2545 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2549 /* This relocation describes which C++ vtable entries are actually
2550 used. Record for later use during GC. */
2551 case R_ARM_GNU_VTENTRY:
2552 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2562 /* Find the nearest line to a particular section and offset, for error
2563 reporting. This code is a duplicate of the code in elf.c, except
2564 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
2567 elf32_arm_find_nearest_line
2568 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2573 CONST char ** filename_ptr;
2574 CONST char ** functionname_ptr;
2575 unsigned int * line_ptr;
2578 const char * filename;
2583 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
2584 filename_ptr, functionname_ptr,
2588 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2589 &found, filename_ptr,
2590 functionname_ptr, line_ptr,
2591 &elf_tdata (abfd)->line_info))
2597 if (symbols == NULL)
2604 for (p = symbols; *p != NULL; p++)
2608 q = (elf_symbol_type *) *p;
2610 if (bfd_get_section (&q->symbol) != section)
2613 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2618 filename = bfd_asymbol_name (&q->symbol);
2623 if (q->symbol.section == section
2624 && q->symbol.value >= low_func
2625 && q->symbol.value <= offset)
2627 func = (asymbol *) q;
2628 low_func = q->symbol.value;
2637 *filename_ptr = filename;
2638 *functionname_ptr = bfd_asymbol_name (func);
2644 /* Adjust a symbol defined by a dynamic object and referenced by a
2645 regular object. The current definition is in some section of the
2646 dynamic object, but we're not including those sections. We have to
2647 change the definition to something the rest of the link can
2651 elf32_arm_adjust_dynamic_symbol (info, h)
2652 struct bfd_link_info * info;
2653 struct elf_link_hash_entry * h;
2657 unsigned int power_of_two;
2659 dynobj = elf_hash_table (info)->dynobj;
2661 /* Make sure we know what is going on here. */
2662 BFD_ASSERT (dynobj != NULL
2663 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2664 || h->weakdef != NULL
2665 || ((h->elf_link_hash_flags
2666 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2667 && (h->elf_link_hash_flags
2668 & ELF_LINK_HASH_REF_REGULAR) != 0
2669 && (h->elf_link_hash_flags
2670 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2672 /* If this is a function, put it in the procedure linkage table. We
2673 will fill in the contents of the procedure linkage table later,
2674 when we know the address of the .got section. */
2675 if (h->type == STT_FUNC
2676 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2679 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2680 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2682 /* This case can occur if we saw a PLT32 reloc in an input
2683 file, but the symbol was never referred to by a dynamic
2684 object. In such a case, we don't actually need to build
2685 a procedure linkage table, and we can just do a PC32
2687 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2691 /* Make sure this symbol is output as a dynamic symbol. */
2692 if (h->dynindx == -1)
2694 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2698 s = bfd_get_section_by_name (dynobj, ".plt");
2699 BFD_ASSERT (s != NULL);
2701 /* If this is the first .plt entry, make room for the special
2703 if (s->_raw_size == 0)
2704 s->_raw_size += PLT_ENTRY_SIZE;
2706 /* If this symbol is not defined in a regular file, and we are
2707 not generating a shared library, then set the symbol to this
2708 location in the .plt. This is required to make function
2709 pointers compare as equal between the normal executable and
2710 the shared library. */
2712 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2714 h->root.u.def.section = s;
2715 h->root.u.def.value = s->_raw_size;
2718 h->plt.offset = s->_raw_size;
2720 /* Make room for this entry. */
2721 s->_raw_size += PLT_ENTRY_SIZE;
2723 /* We also need to make an entry in the .got.plt section, which
2724 will be placed in the .got section by the linker script. */
2726 s = bfd_get_section_by_name (dynobj, ".got.plt");
2727 BFD_ASSERT (s != NULL);
2730 /* We also need to make an entry in the .rel.plt section. */
2732 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2733 BFD_ASSERT (s != NULL);
2734 s->_raw_size += sizeof (Elf32_External_Rel);
2739 /* If this is a weak symbol, and there is a real definition, the
2740 processor independent code will have arranged for us to see the
2741 real definition first, and we can just use the same value. */
2742 if (h->weakdef != NULL)
2744 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2745 || h->weakdef->root.type == bfd_link_hash_defweak);
2746 h->root.u.def.section = h->weakdef->root.u.def.section;
2747 h->root.u.def.value = h->weakdef->root.u.def.value;
2751 /* This is a reference to a symbol defined by a dynamic object which
2752 is not a function. */
2754 /* If we are creating a shared library, we must presume that the
2755 only references to the symbol are via the global offset table.
2756 For such cases we need not do anything here; the relocations will
2757 be handled correctly by relocate_section. */
2761 /* We must allocate the symbol in our .dynbss section, which will
2762 become part of the .bss section of the executable. There will be
2763 an entry for this symbol in the .dynsym section. The dynamic
2764 object will contain position independent code, so all references
2765 from the dynamic object to this symbol will go through the global
2766 offset table. The dynamic linker will use the .dynsym entry to
2767 determine the address it must put in the global offset table, so
2768 both the dynamic object and the regular object will refer to the
2769 same memory location for the variable. */
2771 s = bfd_get_section_by_name (dynobj, ".dynbss");
2772 BFD_ASSERT (s != NULL);
2774 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2775 copy the initial value out of the dynamic object and into the
2776 runtime process image. We need to remember the offset into the
2777 .rel.bss section we are going to use. */
2778 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2782 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
2783 BFD_ASSERT (srel != NULL);
2784 srel->_raw_size += sizeof (Elf32_External_Rel);
2785 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2788 /* We need to figure out the alignment required for this symbol. I
2789 have no idea how ELF linkers handle this. */
2790 power_of_two = bfd_log2 (h->size);
2791 if (power_of_two > 3)
2794 /* Apply the required alignment. */
2795 s->_raw_size = BFD_ALIGN (s->_raw_size,
2796 (bfd_size_type) (1 << power_of_two));
2797 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2799 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2803 /* Define the symbol as being at this point in the section. */
2804 h->root.u.def.section = s;
2805 h->root.u.def.value = s->_raw_size;
2807 /* Increment the section size to make room for the symbol. */
2808 s->_raw_size += h->size;
2813 /* Set the sizes of the dynamic sections. */
2816 elf32_arm_size_dynamic_sections (output_bfd, info)
2818 struct bfd_link_info * info;
2826 dynobj = elf_hash_table (info)->dynobj;
2827 BFD_ASSERT (dynobj != NULL);
2829 if (elf_hash_table (info)->dynamic_sections_created)
2831 /* Set the contents of the .interp section to the interpreter. */
2834 s = bfd_get_section_by_name (dynobj, ".interp");
2835 BFD_ASSERT (s != NULL);
2836 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2837 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2842 /* We may have created entries in the .rel.got section.
2843 However, if we are not creating the dynamic sections, we will
2844 not actually use these entries. Reset the size of .rel.got,
2845 which will cause it to get stripped from the output file
2847 s = bfd_get_section_by_name (dynobj, ".rel.got");
2852 /* If this is a -Bsymbolic shared link, then we need to discard all
2853 PC relative relocs against symbols defined in a regular object.
2854 We allocated space for them in the check_relocs routine, but we
2855 will not fill them in in the relocate_section routine. */
2856 if (info->shared && info->symbolic)
2857 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
2858 elf32_arm_discard_copies,
2861 /* The check_relocs and adjust_dynamic_symbol entry points have
2862 determined the sizes of the various dynamic sections. Allocate
2867 for (s = dynobj->sections; s != NULL; s = s->next)
2872 if ((s->flags & SEC_LINKER_CREATED) == 0)
2875 /* It's OK to base decisions on the section name, because none
2876 of the dynobj section names depend upon the input files. */
2877 name = bfd_get_section_name (dynobj, s);
2881 if (strcmp (name, ".plt") == 0)
2883 if (s->_raw_size == 0)
2885 /* Strip this section if we don't need it; see the
2891 /* Remember whether there is a PLT. */
2895 else if (strncmp (name, ".rel", 4) == 0)
2897 if (s->_raw_size == 0)
2899 /* If we don't need this section, strip it from the
2900 output file. This is mostly to handle .rel.bss and
2901 .rel.plt. We must create both sections in
2902 create_dynamic_sections, because they must be created
2903 before the linker maps input sections to output
2904 sections. The linker does that before
2905 adjust_dynamic_symbol is called, and it is that
2906 function which decides whether anything needs to go
2907 into these sections. */
2914 /* Remember whether there are any reloc sections other
2916 if (strcmp (name, ".rel.plt") != 0)
2918 const char *outname;
2922 /* If this relocation section applies to a read only
2923 section, then we probably need a DT_TEXTREL
2924 entry. The entries in the .rel.plt section
2925 really apply to the .got section, which we
2926 created ourselves and so know is not readonly. */
2927 outname = bfd_get_section_name (output_bfd,
2929 target = bfd_get_section_by_name (output_bfd, outname + 4);
2932 && (target->flags & SEC_READONLY) != 0
2933 && (target->flags & SEC_ALLOC) != 0)
2937 /* We use the reloc_count field as a counter if we need
2938 to copy relocs into the output file. */
2942 else if (strncmp (name, ".got", 4) != 0)
2944 /* It's not one of our sections, so don't allocate space. */
2952 for (spp = &s->output_section->owner->sections;
2953 *spp != s->output_section;
2954 spp = &(*spp)->next)
2956 *spp = s->output_section->next;
2957 --s->output_section->owner->section_count;
2962 /* Allocate memory for the section contents. */
2963 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2964 if (s->contents == NULL && s->_raw_size != 0)
2968 if (elf_hash_table (info)->dynamic_sections_created)
2970 /* Add some entries to the .dynamic section. We fill in the
2971 values later, in elf32_arm_finish_dynamic_sections, but we
2972 must add the entries now so that we get the correct size for
2973 the .dynamic section. The DT_DEBUG entry is filled in by the
2974 dynamic linker and used by the debugger. */
2977 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
2983 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
2984 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2985 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL)
2986 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
2992 if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
2993 || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
2994 || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
2995 sizeof (Elf32_External_Rel)))
3001 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
3003 info->flags |= DF_TEXTREL;
3010 /* This function is called via elf32_arm_link_hash_traverse if we are
3011 creating a shared object with -Bsymbolic. It discards the space
3012 allocated to copy PC relative relocs against symbols which are
3013 defined in regular objects. We allocated space for them in the
3014 check_relocs routine, but we won't fill them in in the
3015 relocate_section routine. */
3018 elf32_arm_discard_copies (h, ignore)
3019 struct elf32_arm_link_hash_entry * h;
3020 PTR ignore ATTRIBUTE_UNUSED;
3022 struct elf32_arm_pcrel_relocs_copied * s;
3024 /* We only discard relocs for symbols defined in a regular object. */
3025 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3028 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3029 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
3034 /* Finish up dynamic symbol handling. We set the contents of various
3035 dynamic sections here. */
3038 elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3040 struct bfd_link_info * info;
3041 struct elf_link_hash_entry * h;
3042 Elf_Internal_Sym * sym;
3046 dynobj = elf_hash_table (info)->dynobj;
3048 if (h->plt.offset != (bfd_vma) -1)
3055 Elf_Internal_Rel rel;
3057 /* This symbol has an entry in the procedure linkage table. Set
3060 BFD_ASSERT (h->dynindx != -1);
3062 splt = bfd_get_section_by_name (dynobj, ".plt");
3063 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3064 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
3065 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
3067 /* Get the index in the procedure linkage table which
3068 corresponds to this symbol. This is the index of this symbol
3069 in all the symbols for which we are making plt entries. The
3070 first entry in the procedure linkage table is reserved. */
3071 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3073 /* Get the offset into the .got table of the entry that
3074 corresponds to this function. Each .got entry is 4 bytes.
3075 The first three are reserved. */
3076 got_offset = (plt_index + 3) * 4;
3078 /* Fill in the entry in the procedure linkage table. */
3079 memcpy (splt->contents + h->plt.offset,
3080 elf32_arm_plt_entry,
3082 bfd_put_32 (output_bfd,
3083 (sgot->output_section->vma
3084 + sgot->output_offset
3086 - splt->output_section->vma
3087 - splt->output_offset
3088 - h->plt.offset - 12),
3089 splt->contents + h->plt.offset + 12);
3091 /* Fill in the entry in the global offset table. */
3092 bfd_put_32 (output_bfd,
3093 (splt->output_section->vma
3094 + splt->output_offset),
3095 sgot->contents + got_offset);
3097 /* Fill in the entry in the .rel.plt section. */
3098 rel.r_offset = (sgot->output_section->vma
3099 + sgot->output_offset
3101 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
3102 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3103 ((Elf32_External_Rel *) srel->contents
3106 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3108 /* Mark the symbol as undefined, rather than as defined in
3109 the .plt section. Leave the value alone. */
3110 sym->st_shndx = SHN_UNDEF;
3114 if (h->got.offset != (bfd_vma) -1)
3118 Elf_Internal_Rel rel;
3120 /* This symbol has an entry in the global offset table. Set it
3123 sgot = bfd_get_section_by_name (dynobj, ".got");
3124 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3125 BFD_ASSERT (sgot != NULL && srel != NULL);
3127 rel.r_offset = (sgot->output_section->vma
3128 + sgot->output_offset
3129 + (h->got.offset &~ 1));
3131 /* If this is a -Bsymbolic link, and the symbol is defined
3132 locally, we just want to emit a RELATIVE reloc. The entry in
3133 the global offset table will already have been initialized in
3134 the relocate_section function. */
3136 && (info->symbolic || h->dynindx == -1)
3137 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3138 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3141 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3142 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3145 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3146 ((Elf32_External_Rel *) srel->contents
3147 + srel->reloc_count));
3148 ++srel->reloc_count;
3151 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3154 Elf_Internal_Rel rel;
3156 /* This symbol needs a copy reloc. Set it up. */
3158 BFD_ASSERT (h->dynindx != -1
3159 && (h->root.type == bfd_link_hash_defined
3160 || h->root.type == bfd_link_hash_defweak));
3162 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3164 BFD_ASSERT (s != NULL);
3166 rel.r_offset = (h->root.u.def.value
3167 + h->root.u.def.section->output_section->vma
3168 + h->root.u.def.section->output_offset);
3169 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3170 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3171 ((Elf32_External_Rel *) s->contents
3176 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3177 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3178 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3179 sym->st_shndx = SHN_ABS;
3184 /* Finish up the dynamic sections. */
3187 elf32_arm_finish_dynamic_sections (output_bfd, info)
3189 struct bfd_link_info * info;
3195 dynobj = elf_hash_table (info)->dynobj;
3197 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3198 BFD_ASSERT (sgot != NULL);
3199 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3201 if (elf_hash_table (info)->dynamic_sections_created)
3204 Elf32_External_Dyn *dyncon, *dynconend;
3206 splt = bfd_get_section_by_name (dynobj, ".plt");
3207 BFD_ASSERT (splt != NULL && sdyn != NULL);
3209 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3210 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3211 for (; dyncon < dynconend; dyncon++)
3213 Elf_Internal_Dyn dyn;
3217 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3230 s = bfd_get_section_by_name (output_bfd, name);
3231 BFD_ASSERT (s != NULL);
3232 dyn.d_un.d_ptr = s->vma;
3233 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3237 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3238 BFD_ASSERT (s != NULL);
3239 if (s->_cooked_size != 0)
3240 dyn.d_un.d_val = s->_cooked_size;
3242 dyn.d_un.d_val = s->_raw_size;
3243 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3247 /* My reading of the SVR4 ABI indicates that the
3248 procedure linkage table relocs (DT_JMPREL) should be
3249 included in the overall relocs (DT_REL). This is
3250 what Solaris does. However, UnixWare can not handle
3251 that case. Therefore, we override the DT_RELSZ entry
3252 here to make it not include the JMPREL relocs. Since
3253 the linker script arranges for .rel.plt to follow all
3254 other relocation sections, we don't have to worry
3255 about changing the DT_REL entry. */
3256 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3259 if (s->_cooked_size != 0)
3260 dyn.d_un.d_val -= s->_cooked_size;
3262 dyn.d_un.d_val -= s->_raw_size;
3264 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3269 /* Fill in the first entry in the procedure linkage table. */
3270 if (splt->_raw_size > 0)
3271 memcpy (splt->contents, elf32_arm_plt0_entry, PLT_ENTRY_SIZE);
3273 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3274 really seem like the right value. */
3275 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3278 /* Fill in the first three entries in the global offset table. */
3279 if (sgot->_raw_size > 0)
3282 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3284 bfd_put_32 (output_bfd,
3285 sdyn->output_section->vma + sdyn->output_offset,
3287 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3288 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3291 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3297 elf32_arm_post_process_headers (abfd, link_info)
3299 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
3301 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
3303 i_ehdrp = elf_elfheader (abfd);
3305 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3306 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3310 #define ELF_ARCH bfd_arch_arm
3311 #define ELF_MACHINE_CODE EM_ARM
3312 #define ELF_MAXPAGESIZE 0x8000
3315 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3316 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
3317 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3318 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3319 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
3320 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
3321 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3323 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3324 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3325 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3326 #define elf_backend_check_relocs elf32_arm_check_relocs
3327 #define elf_backend_relocate_section elf32_arm_relocate_section
3328 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3329 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3330 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3331 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3332 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
3333 #define elf_backend_post_process_headers elf32_arm_post_process_headers
3335 #define elf_backend_can_gc_sections 1
3336 #define elf_backend_plt_readonly 1
3337 #define elf_backend_want_got_plt 1
3338 #define elf_backend_want_plt_sym 0
3340 #define elf_backend_got_header_size 12
3341 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
3343 #include "elf32-target.h"