1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999 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
;
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
;
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
);
741 if (free_relocs
!= NULL
)
743 if (free_contents
!= NULL
)
744 free (free_contents
);
745 if (free_extsyms
!= NULL
)
751 /* The thumb form of a long branch is a bit finicky, because the offset
752 encoding is split over two fields, each in it's own instruction. They
753 can occur in any order. So given a thumb form of long branch, and an
754 offset, insert the offset into the thumb branch and return finished
757 It takes two thumb instructions to encode the target address. Each has
758 11 bits to invest. The upper 11 bits are stored in one (identifed by
759 H-0.. see below), the lower 11 bits are stored in the other (identified
762 Combine together and shifted left by 1 (it's a half word address) and
766 H-0, upper address-0 = 000
768 H-1, lower address-0 = 800
770 They can be ordered either way, but the arm tools I've seen always put
771 the lower one first. It probably doesn't matter. krk@cygnus.com
773 XXX: Actually the order does matter. The second instruction (H-1)
774 moves the computed address into the PC, so it must be the second one
775 in the sequence. The problem, however is that whilst little endian code
776 stores the instructions in HI then LOW order, big endian code does the
777 reverse. nickc@cygnus.com */
779 #define LOW_HI_ORDER 0xF800F000
780 #define HI_LOW_ORDER 0xF000F800
783 insert_thumb_branch (br_insn
, rel_off
)
787 unsigned int low_bits
;
788 unsigned int high_bits
;
791 BFD_ASSERT ((rel_off
& 1) != 1);
793 rel_off
>>= 1; /* half word aligned address */
794 low_bits
= rel_off
& 0x000007FF; /* the bottom 11 bits */
795 high_bits
= (rel_off
>> 11) & 0x000007FF; /* the top 11 bits */
797 if ((br_insn
& LOW_HI_ORDER
) == LOW_HI_ORDER
)
798 br_insn
= LOW_HI_ORDER
| (low_bits
<< 16) | high_bits
;
799 else if ((br_insn
& HI_LOW_ORDER
) == HI_LOW_ORDER
)
800 br_insn
= HI_LOW_ORDER
| (high_bits
<< 16) | low_bits
;
802 abort (); /* error - not a valid branch instruction form */
804 /* FIXME: abort is probably not the right call. krk@cygnus.com */
809 /* Thumb code calling an ARM function */
811 elf32_thumb_to_arm_stub (info
, name
, input_bfd
, output_bfd
, input_section
,
812 hit_data
, sym_sec
, offset
, addend
, val
)
813 struct bfd_link_info
* info
;
817 asection
* input_section
;
821 bfd_signed_vma addend
;
826 unsigned long int tmp
;
828 struct elf_link_hash_entry
* myh
;
829 struct elf32_arm_link_hash_table
* globals
;
831 myh
= find_thumb_glue (info
, name
, input_bfd
);
835 globals
= elf32_arm_hash_table (info
);
837 BFD_ASSERT (globals
!= NULL
);
838 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
840 my_offset
= myh
->root
.u
.def
.value
;
842 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
843 THUMB2ARM_GLUE_SECTION_NAME
);
845 BFD_ASSERT (s
!= NULL
);
846 BFD_ASSERT (s
->contents
!= NULL
);
847 BFD_ASSERT (s
->output_section
!= NULL
);
849 if ((my_offset
& 0x01) == 0x01)
852 && sym_sec
->owner
!= NULL
853 && !INTERWORK_FLAG (sym_sec
->owner
))
856 (_ ("%s(%s): warning: interworking not enabled."),
857 bfd_get_filename (sym_sec
->owner
), name
);
859 (_ (" first occurrence: %s: thumb call to arm"),
860 bfd_get_filename (input_bfd
));
866 myh
->root
.u
.def
.value
= my_offset
;
868 bfd_put_16 (output_bfd
, t2a1_bx_pc_insn
,
869 s
->contents
+ my_offset
);
871 bfd_put_16 (output_bfd
, t2a2_noop_insn
,
872 s
->contents
+ my_offset
+ 2);
875 ((bfd_signed_vma
) val
) /* Address of destination of the stub */
877 (s
->output_offset
/* Offset from the start of the current section to the start of the stubs. */
878 + my_offset
/* Offset of the start of this stub from the start of the stubs. */
879 + s
->output_section
->vma
) /* Address of the start of the current section. */
880 + 4 /* The branch instruction is 4 bytes into the stub. */
881 + 8); /* ARM branches work from the pc of the instruction + 8. */
883 bfd_put_32 (output_bfd
,
884 t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
885 s
->contents
+ my_offset
+ 4);
888 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
890 /* Now go back and fix up the original BL insn to point
895 - (input_section
->output_offset
899 tmp
= bfd_get_32 (input_bfd
, hit_data
900 - input_section
->vma
);
902 bfd_put_32 (output_bfd
,
903 insert_thumb_branch (tmp
, ret_offset
),
904 hit_data
- input_section
->vma
);
909 /* Arm code calling a Thumb function */
911 elf32_arm_to_thumb_stub (info
, name
, input_bfd
, output_bfd
, input_section
,
912 hit_data
, sym_sec
, offset
, addend
, val
)
913 struct bfd_link_info
* info
;
917 asection
* input_section
;
921 bfd_signed_vma addend
;
924 unsigned long int tmp
;
928 struct elf_link_hash_entry
* myh
;
929 struct elf32_arm_link_hash_table
* globals
;
931 myh
= find_arm_glue (info
, name
, input_bfd
);
935 globals
= elf32_arm_hash_table (info
);
937 BFD_ASSERT (globals
!= NULL
);
938 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
940 my_offset
= myh
->root
.u
.def
.value
;
941 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
942 ARM2THUMB_GLUE_SECTION_NAME
);
943 BFD_ASSERT (s
!= NULL
);
944 BFD_ASSERT (s
->contents
!= NULL
);
945 BFD_ASSERT (s
->output_section
!= NULL
);
947 if ((my_offset
& 0x01) == 0x01)
950 && sym_sec
->owner
!= NULL
951 && !INTERWORK_FLAG (sym_sec
->owner
))
954 (_ ("%s(%s): warning: interworking not enabled."),
955 bfd_get_filename (sym_sec
->owner
), name
);
957 (_ (" first occurrence: %s: arm call to thumb"),
958 bfd_get_filename (input_bfd
));
961 myh
->root
.u
.def
.value
= my_offset
;
963 bfd_put_32 (output_bfd
, a2t1_ldr_insn
,
964 s
->contents
+ my_offset
);
966 bfd_put_32 (output_bfd
, a2t2_bx_r12_insn
,
967 s
->contents
+ my_offset
+ 4);
969 /* It's a thumb address. Add the low order bit. */
970 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
971 s
->contents
+ my_offset
+ 8);
974 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
976 tmp
= bfd_get_32 (input_bfd
, hit_data
);
977 tmp
= tmp
& 0xFF000000;
979 /* Somehow these are both 4 too far, so subtract 8. */
980 ret_offset
= s
->output_offset
982 + s
->output_section
->vma
983 - (input_section
->output_offset
984 + input_section
->output_section
->vma
988 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
990 bfd_put_32 (output_bfd
, tmp
, hit_data
991 - input_section
->vma
);
996 /* Perform a relocation as part of a final link. */
997 static bfd_reloc_status_type
998 elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
999 input_section
, contents
, rel
, value
,
1000 info
, sym_sec
, sym_name
, sym_flags
, h
)
1001 reloc_howto_type
* howto
;
1004 asection
* input_section
;
1005 bfd_byte
* contents
;
1006 Elf_Internal_Rela
* rel
;
1008 struct bfd_link_info
* info
;
1010 const char * sym_name
;
1011 unsigned char sym_flags
;
1012 struct elf_link_hash_entry
* h
;
1014 unsigned long r_type
= howto
->type
;
1015 unsigned long r_symndx
;
1016 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
1017 bfd
* dynobj
= NULL
;
1018 Elf_Internal_Shdr
* symtab_hdr
;
1019 struct elf_link_hash_entry
** sym_hashes
;
1020 bfd_vma
* local_got_offsets
;
1021 asection
* sgot
= NULL
;
1022 asection
* splt
= NULL
;
1023 asection
* sreloc
= NULL
;
1025 bfd_signed_vma signed_addend
;
1026 struct elf32_arm_link_hash_table
* globals
;
1028 globals
= elf32_arm_hash_table (info
);
1030 dynobj
= elf_hash_table (info
)->dynobj
;
1033 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1034 splt
= bfd_get_section_by_name (dynobj
, ".plt");
1036 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1037 sym_hashes
= elf_sym_hashes (input_bfd
);
1038 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1039 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1042 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
1044 if (addend
& ((howto
->src_mask
+ 1) >> 1))
1047 signed_addend
&= ~ howto
->src_mask
;
1048 signed_addend
|= addend
;
1051 signed_addend
= addend
;
1053 addend
= signed_addend
= rel
->r_addend
;
1059 return bfd_reloc_ok
;
1064 /* When generating a shared object, these relocations are copied
1065 into the output file to be resolved at run time. */
1068 && (r_type
!= R_ARM_PC24
1071 && (! info
->symbolic
1072 || (h
->elf_link_hash_flags
1073 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
1075 Elf_Internal_Rel outrel
;
1076 boolean skip
, relocate
;
1082 name
= (bfd_elf_string_from_elf_section
1084 elf_elfheader (input_bfd
)->e_shstrndx
,
1085 elf_section_data (input_section
)->rel_hdr
.sh_name
));
1087 return bfd_reloc_notsupported
;
1089 BFD_ASSERT (strncmp (name
, ".rel", 4) == 0
1090 && strcmp (bfd_get_section_name (input_bfd
,
1094 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1095 BFD_ASSERT (sreloc
!= NULL
);
1100 if (elf_section_data (input_section
)->stab_info
== NULL
)
1101 outrel
.r_offset
= rel
->r_offset
;
1106 off
= (_bfd_stab_section_offset
1107 (output_bfd
, &elf_hash_table (info
)->stab_info
,
1109 & elf_section_data (input_section
)->stab_info
,
1111 if (off
== (bfd_vma
) -1)
1113 outrel
.r_offset
= off
;
1116 outrel
.r_offset
+= (input_section
->output_section
->vma
1117 + input_section
->output_offset
);
1121 memset (&outrel
, 0, sizeof outrel
);
1124 else if (r_type
== R_ARM_PC24
)
1126 BFD_ASSERT (h
!= NULL
&& h
->dynindx
!= -1);
1127 if ((input_section
->flags
& SEC_ALLOC
) != 0)
1131 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_PC24
);
1136 || ((info
->symbolic
|| h
->dynindx
== -1)
1137 && (h
->elf_link_hash_flags
1138 & ELF_LINK_HASH_DEF_REGULAR
) != 0))
1141 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
1145 BFD_ASSERT (h
->dynindx
!= -1);
1146 if ((input_section
->flags
& SEC_ALLOC
) != 0)
1150 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_ABS32
);
1154 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1155 (((Elf32_External_Rel
*)
1157 + sreloc
->reloc_count
));
1158 ++sreloc
->reloc_count
;
1160 /* If this reloc is against an external symbol, we do not want to
1161 fiddle with the addend. Otherwise, we need to include the symbol
1162 value so that it becomes an addend for the dynamic reloc. */
1164 return bfd_reloc_ok
;
1167 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1168 contents
, rel
->r_offset
, value
,
1171 else switch (r_type
)
1174 /* Arm B/BL instruction */
1176 /* Check for arm calling thumb function. */
1177 if (sym_flags
== STT_ARM_TFUNC
)
1179 elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
, output_bfd
,
1180 input_section
, hit_data
, sym_sec
, rel
->r_offset
,
1181 signed_addend
, value
);
1182 return bfd_reloc_ok
;
1185 if ( strcmp (bfd_get_target (input_bfd
), "elf32-littlearm-oabi") == 0
1186 || strcmp (bfd_get_target (input_bfd
), "elf32-bigarm-oabi") == 0)
1188 /* The old way of doing things. Trearing the addend as a
1189 byte sized field and adding in the pipeline offset. */
1191 value
-= (input_section
->output_section
->vma
1192 + input_section
->output_offset
);
1193 value
-= rel
->r_offset
;
1196 if (! globals
->no_pipeline_knowledge
)
1201 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1203 S is the address of the symbol in the relocation.
1204 P is address of the instruction being relocated.
1205 A is the addend (extracted from the instruction) in bytes.
1207 S is held in 'value'.
1208 P is the base address of the section containing the instruction
1209 plus the offset of the reloc into that section, ie:
1210 (input_section->output_section->vma +
1211 input_section->output_offset +
1213 A is the addend, converted into bytes, ie:
1216 Note: None of these operations have knowledge of the pipeline
1217 size of the processor, thus it is up to the assembler to encode
1218 this information into the addend. */
1220 value
-= (input_section
->output_section
->vma
1221 + input_section
->output_offset
);
1222 value
-= rel
->r_offset
;
1223 value
+= (signed_addend
<< howto
->size
);
1225 /* Previous versions of this code also used to add in the pipeline
1226 offset here. This is wrong because the linker is not supposed
1227 to know about such things, and one day it might change. In order
1228 to support old binaries that need the old behaviour however, so
1229 we attempt to detect which ABI was used to create the reloc. */
1230 if (! globals
->no_pipeline_knowledge
)
1232 Elf_Internal_Ehdr
* i_ehdrp
; /* Elf file header, internal form */
1234 i_ehdrp
= elf_elfheader (input_bfd
);
1236 if (i_ehdrp
->e_ident
[EI_OSABI
] == 0)
1241 /* It is not an error for an undefined weak reference to be
1242 out of range. Any program that branches to such a symbol
1243 is going to crash anyway, so there is no point worrying
1244 about getting the destination exactly right. */
1245 if (! h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
1247 /* Perform a signed range check. */
1248 signed_addend
= value
;
1249 signed_addend
>>= howto
->rightshift
;
1250 if (signed_addend
> ((bfd_signed_vma
)(howto
->dst_mask
>> 1))
1251 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
1252 return bfd_reloc_overflow
;
1255 value
= (signed_addend
& howto
->dst_mask
)
1256 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
1261 if (sym_flags
== STT_ARM_TFUNC
)
1266 value
-= (input_section
->output_section
->vma
1267 + input_section
->output_offset
);
1272 bfd_put_32 (input_bfd
, value
, hit_data
);
1273 return bfd_reloc_ok
;
1277 if ((long) value
> 0x7f || (long) value
< -0x80)
1278 return bfd_reloc_overflow
;
1280 bfd_put_8 (input_bfd
, value
, hit_data
);
1281 return bfd_reloc_ok
;
1286 if ((long) value
> 0x7fff || (long) value
< -0x8000)
1287 return bfd_reloc_overflow
;
1289 bfd_put_16 (input_bfd
, value
, hit_data
);
1290 return bfd_reloc_ok
;
1293 /* Support ldr and str instruction for the arm */
1294 /* Also thumb b (unconditional branch). ??? Really? */
1297 if ((long) value
> 0x7ff || (long) value
< -0x800)
1298 return bfd_reloc_overflow
;
1300 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0xfffff000);
1301 bfd_put_32 (input_bfd
, value
, hit_data
);
1302 return bfd_reloc_ok
;
1304 case R_ARM_THM_ABS5
:
1305 /* Support ldr and str instructions for the thumb. */
1307 /* Need to refetch addend. */
1308 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
1309 /* ??? Need to determine shift amount from operand size. */
1310 addend
>>= howto
->rightshift
;
1314 /* ??? Isn't value unsigned? */
1315 if ((long) value
> 0x1f || (long) value
< -0x10)
1316 return bfd_reloc_overflow
;
1318 /* ??? Value needs to be properly shifted into place first. */
1319 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
1320 bfd_put_16 (input_bfd
, value
, hit_data
);
1321 return bfd_reloc_ok
;
1323 case R_ARM_THM_PC22
:
1324 /* Thumb BL (branch long instruction). */
1327 boolean overflow
= false;
1328 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
1329 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
1330 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
1331 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
1333 bfd_signed_vma signed_check
;
1336 /* Need to refetch the addend and squish the two 11 bit pieces
1339 bfd_vma upper
= upper_insn
& 0x7ff;
1340 bfd_vma lower
= lower_insn
& 0x7ff;
1341 upper
= (upper
^ 0x400) - 0x400; /* sign extend */
1342 addend
= (upper
<< 12) | (lower
<< 1);
1343 signed_addend
= addend
;
1347 /* If it is not a call to thumb, assume call to arm.
1348 If it is a call relative to a section name, then it is not a
1349 function call at all, but rather a long jump. */
1350 if (sym_flags
!= STT_ARM_TFUNC
&& sym_flags
!= STT_SECTION
)
1352 if (elf32_thumb_to_arm_stub
1353 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
1354 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
))
1355 return bfd_reloc_ok
;
1357 return bfd_reloc_dangerous
;
1360 relocation
= value
+ signed_addend
;
1362 relocation
-= (input_section
->output_section
->vma
1363 + input_section
->output_offset
1366 if (! globals
->no_pipeline_knowledge
)
1368 Elf_Internal_Ehdr
* i_ehdrp
; /* Elf file header, internal form */
1370 i_ehdrp
= elf_elfheader (input_bfd
);
1372 /* Previous versions of this code also used to add in the pipline
1373 offset here. This is wrong because the linker is not supposed
1374 to know about such things, and one day it might change. In order
1375 to support old binaries that need the old behaviour however, so
1376 we attempt to detect which ABI was used to create the reloc. */
1377 if ( strcmp (bfd_get_target (input_bfd
), "elf32-littlearm-oabi") == 0
1378 || strcmp (bfd_get_target (input_bfd
), "elf32-bigarm-oabi") == 0
1379 || i_ehdrp
->e_ident
[EI_OSABI
] == 0)
1383 check
= relocation
>> howto
->rightshift
;
1385 /* If this is a signed value, the rightshift just dropped
1386 leading 1 bits (assuming twos complement). */
1387 if ((bfd_signed_vma
) relocation
>= 0)
1388 signed_check
= check
;
1390 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
1392 /* Assumes two's complement. */
1393 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
1396 /* Put RELOCATION back into the insn. */
1397 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff) | ((relocation
>> 12) & 0x7ff);
1398 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x7ff) | ((relocation
>> 1) & 0x7ff);
1400 /* Put the relocated value back in the object file: */
1401 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
1402 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
1404 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
1408 case R_ARM_GNU_VTINHERIT
:
1409 case R_ARM_GNU_VTENTRY
:
1410 return bfd_reloc_ok
;
1413 return bfd_reloc_notsupported
;
1415 case R_ARM_GLOB_DAT
:
1416 return bfd_reloc_notsupported
;
1418 case R_ARM_JUMP_SLOT
:
1419 return bfd_reloc_notsupported
;
1421 case R_ARM_RELATIVE
:
1422 return bfd_reloc_notsupported
;
1425 /* Relocation is relative to the start of the
1426 global offset table. */
1428 BFD_ASSERT (sgot
!= NULL
);
1430 return bfd_reloc_notsupported
;
1432 /* Note that sgot->output_offset is not involved in this
1433 calculation. We always want the start of .got. If we
1434 define _GLOBAL_OFFSET_TABLE in a different way, as is
1435 permitted by the ABI, we might have to change this
1438 value
-= sgot
->output_section
->vma
;
1439 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1440 contents
, rel
->r_offset
, value
,
1444 /* Use global offset table as symbol value. */
1446 BFD_ASSERT (sgot
!= NULL
);
1449 return bfd_reloc_notsupported
;
1451 value
= sgot
->output_section
->vma
;
1452 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1453 contents
, rel
->r_offset
, value
,
1457 /* Relocation is to the entry for this symbol in the
1458 global offset table. */
1460 return bfd_reloc_notsupported
;
1466 off
= h
->got
.offset
;
1467 BFD_ASSERT (off
!= (bfd_vma
) -1);
1469 if (!elf_hash_table (info
)->dynamic_sections_created
||
1470 (info
->shared
&& (info
->symbolic
|| h
->dynindx
== -1)
1471 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
1473 /* This is actually a static link, or it is a -Bsymbolic link
1474 and the symbol is defined locally. We must initialize this
1475 entry in the global offset table. Since the offset must
1476 always be a multiple of 4, we use the least significant bit
1477 to record whether we have initialized it already.
1479 When doing a dynamic link, we create a .rel.got relocation
1480 entry to initialize the value. This is done in the
1481 finish_dynamic_symbol routine. */
1487 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
1492 value
= sgot
->output_offset
+ off
;
1498 BFD_ASSERT (local_got_offsets
!= NULL
&&
1499 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
1501 off
= local_got_offsets
[r_symndx
];
1503 /* The offset must always be a multiple of 4. We use the
1504 least significant bit to record whether we have already
1505 generated the necessary reloc. */
1510 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
1515 Elf_Internal_Rel outrel
;
1517 srelgot
= bfd_get_section_by_name (dynobj
, ".rel.got");
1518 BFD_ASSERT (srelgot
!= NULL
);
1520 outrel
.r_offset
= (sgot
->output_section
->vma
1521 + sgot
->output_offset
1523 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
1524 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1525 (((Elf32_External_Rel
*)
1527 + srelgot
->reloc_count
));
1528 ++srelgot
->reloc_count
;
1531 local_got_offsets
[r_symndx
] |= 1;
1534 value
= sgot
->output_offset
+ off
;
1537 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1538 contents
, rel
->r_offset
, value
,
1542 /* Relocation is to the entry for this symbol in the
1543 procedure linkage table. */
1545 /* Resolve a PLT32 reloc against a local symbol directly,
1546 without using the procedure linkage table. */
1548 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1549 contents
, rel
->r_offset
, value
,
1552 if (h
->plt
.offset
== (bfd_vma
) -1)
1553 /* We didn't make a PLT entry for this symbol. This
1554 happens when statically linking PIC code, or when
1555 using -Bsymbolic. */
1556 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1557 contents
, rel
->r_offset
, value
,
1560 BFD_ASSERT(splt
!= NULL
);
1562 return bfd_reloc_notsupported
;
1564 value
= (splt
->output_section
->vma
1565 + splt
->output_offset
1567 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1568 contents
, rel
->r_offset
, value
,
1572 return bfd_reloc_notsupported
;
1574 case R_ARM_AMP_VCALL9
:
1575 return bfd_reloc_notsupported
;
1577 case R_ARM_RSBREL32
:
1578 return bfd_reloc_notsupported
;
1580 case R_ARM_THM_RPC22
:
1581 return bfd_reloc_notsupported
;
1584 return bfd_reloc_notsupported
;
1587 return bfd_reloc_notsupported
;
1590 return bfd_reloc_notsupported
;
1593 return bfd_reloc_notsupported
;
1596 return bfd_reloc_notsupported
;
1601 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1603 arm_add_to_rel (abfd
, address
, howto
, increment
)
1606 reloc_howto_type
* howto
;
1607 bfd_signed_vma increment
;
1610 bfd_signed_vma addend
;
1612 contents
= bfd_get_32 (abfd
, address
);
1614 /* Get the (signed) value from the instruction. */
1615 addend
= contents
& howto
->src_mask
;
1616 if (addend
& ((howto
->src_mask
+ 1) >> 1))
1618 bfd_signed_vma mask
;
1621 mask
&= ~ howto
->src_mask
;
1625 /* Add in the increment, (which is a byte value). */
1626 switch (howto
->type
)
1628 case R_ARM_THM_PC22
:
1630 addend
+= increment
;
1634 addend
<<= howto
->size
;
1635 addend
+= increment
;
1637 /* Should we check for overflow here ? */
1639 /* Drop any undesired bits. */
1640 addend
>>= howto
->rightshift
;
1644 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
1646 bfd_put_32 (abfd
, contents
, address
);
1648 #endif /* USE_REL */
1650 /* Relocate an ARM ELF section. */
1652 elf32_arm_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
1653 contents
, relocs
, local_syms
, local_sections
)
1655 struct bfd_link_info
* info
;
1657 asection
* input_section
;
1658 bfd_byte
* contents
;
1659 Elf_Internal_Rela
* relocs
;
1660 Elf_Internal_Sym
* local_syms
;
1661 asection
** local_sections
;
1663 Elf_Internal_Shdr
* symtab_hdr
;
1664 struct elf_link_hash_entry
** sym_hashes
;
1665 Elf_Internal_Rela
* rel
;
1666 Elf_Internal_Rela
* relend
;
1669 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1670 sym_hashes
= elf_sym_hashes (input_bfd
);
1673 relend
= relocs
+ input_section
->reloc_count
;
1674 for (; rel
< relend
; rel
++)
1677 reloc_howto_type
* howto
;
1678 unsigned long r_symndx
;
1679 Elf_Internal_Sym
* sym
;
1681 struct elf_link_hash_entry
* h
;
1683 bfd_reloc_status_type r
;
1686 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1687 r_type
= ELF32_R_TYPE (rel
->r_info
);
1689 if ( r_type
== R_ARM_GNU_VTENTRY
1690 || r_type
== R_ARM_GNU_VTINHERIT
)
1693 elf32_arm_info_to_howto (input_bfd
, & bfd_reloc
, rel
);
1694 howto
= bfd_reloc
.howto
;
1696 if (info
->relocateable
)
1698 /* This is a relocateable link. We don't have to change
1699 anything, unless the reloc is against a section symbol,
1700 in which case we have to adjust according to where the
1701 section symbol winds up in the output section. */
1702 if (r_symndx
< symtab_hdr
->sh_info
)
1704 sym
= local_syms
+ r_symndx
;
1705 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
1707 sec
= local_sections
[r_symndx
];
1709 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
1710 howto
, sec
->output_offset
+ sym
->st_value
);
1712 rel
->r_addend
+= (sec
->output_offset
+ sym
->st_value
)
1713 >> howto
->rightshift
;
1721 /* This is a final link. */
1725 if (r_symndx
< symtab_hdr
->sh_info
)
1727 sym
= local_syms
+ r_symndx
;
1728 sec
= local_sections
[r_symndx
];
1729 relocation
= (sec
->output_section
->vma
1730 + sec
->output_offset
1735 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1736 while (h
->root
.type
== bfd_link_hash_indirect
1737 || h
->root
.type
== bfd_link_hash_warning
)
1738 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1739 if (h
->root
.type
== bfd_link_hash_defined
1740 || h
->root
.type
== bfd_link_hash_defweak
)
1742 int relocation_needed
= 1;
1744 sec
= h
->root
.u
.def
.section
;
1746 /* In these cases, we don't need the relocation value.
1747 We check specially because in some obscure cases
1748 sec->output_section will be NULL. */
1755 (!info
->symbolic
&& h
->dynindx
!= -1)
1756 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
1758 && ((input_section
->flags
& SEC_ALLOC
) != 0)
1760 relocation_needed
= 0;
1764 relocation_needed
= 0;
1768 if (elf_hash_table(info
)->dynamic_sections_created
1770 || (!info
->symbolic
&& h
->dynindx
!= -1)
1771 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
1774 relocation_needed
= 0;
1778 if (h
->plt
.offset
!= (bfd_vma
)-1)
1779 relocation_needed
= 0;
1783 if (sec
->output_section
== NULL
)
1785 (*_bfd_error_handler
)
1786 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1787 bfd_get_filename (input_bfd
), h
->root
.root
.string
,
1788 bfd_get_section_name (input_bfd
, input_section
));
1789 relocation_needed
= 0;
1793 if (relocation_needed
)
1794 relocation
= h
->root
.u
.def
.value
1795 + sec
->output_section
->vma
1796 + sec
->output_offset
;
1800 else if (h
->root
.type
== bfd_link_hash_undefweak
)
1802 else if (info
->shared
&& !info
->symbolic
&& !info
->no_undefined
)
1806 if (!((*info
->callbacks
->undefined_symbol
)
1807 (info
, h
->root
.root
.string
, input_bfd
,
1808 input_section
, rel
->r_offset
)))
1815 name
= h
->root
.root
.string
;
1818 name
= (bfd_elf_string_from_elf_section
1819 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1820 if (name
== NULL
|| *name
== '\0')
1821 name
= bfd_section_name (input_bfd
, sec
);
1824 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
1825 input_section
, contents
, rel
,
1826 relocation
, info
, sec
, name
,
1827 (h
? ELF_ST_TYPE (h
->type
) :
1828 ELF_ST_TYPE (sym
->st_info
)), h
);
1830 if (r
!= bfd_reloc_ok
)
1832 const char * msg
= (const char *) 0;
1836 case bfd_reloc_overflow
:
1837 if (!((*info
->callbacks
->reloc_overflow
)
1838 (info
, name
, howto
->name
, (bfd_vma
) 0,
1839 input_bfd
, input_section
, rel
->r_offset
)))
1843 case bfd_reloc_undefined
:
1844 if (!((*info
->callbacks
->undefined_symbol
)
1845 (info
, name
, input_bfd
, input_section
,
1850 case bfd_reloc_outofrange
:
1851 msg
= _ ("internal error: out of range error");
1854 case bfd_reloc_notsupported
:
1855 msg
= _ ("internal error: unsupported relocation error");
1858 case bfd_reloc_dangerous
:
1859 msg
= _ ("internal error: dangerous error");
1863 msg
= _ ("internal error: unknown error");
1867 if (!((*info
->callbacks
->warning
)
1868 (info
, msg
, name
, input_bfd
, input_section
,
1879 /* Function to keep ARM specific flags in the ELF header. */
1881 elf32_arm_set_private_flags (abfd
, flags
)
1885 if (elf_flags_init (abfd
)
1886 && elf_elfheader (abfd
)->e_flags
!= flags
)
1888 if (flags
& EF_INTERWORK
)
1889 _bfd_error_handler (_ ("\
1890 Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
1891 bfd_get_filename (abfd
));
1893 _bfd_error_handler (_ ("\
1894 Warning: Clearing the interwork flag of %s due to outside request"),
1895 bfd_get_filename (abfd
));
1899 elf_elfheader (abfd
)->e_flags
= flags
;
1900 elf_flags_init (abfd
) = true;
1906 /* Copy backend specific data from one object module to another */
1908 elf32_arm_copy_private_bfd_data (ibfd
, obfd
)
1915 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1916 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1919 in_flags
= elf_elfheader (ibfd
)->e_flags
;
1920 out_flags
= elf_elfheader (obfd
)->e_flags
;
1922 if (elf_flags_init (obfd
) && in_flags
!= out_flags
)
1924 /* Cannot mix PIC and non-PIC code. */
1925 if ((in_flags
& EF_PIC
) != (out_flags
& EF_PIC
))
1928 /* Cannot mix APCS26 and APCS32 code. */
1929 if ((in_flags
& EF_APCS_26
) != (out_flags
& EF_APCS_26
))
1932 /* Cannot mix float APCS and non-float APCS code. */
1933 if ((in_flags
& EF_APCS_FLOAT
) != (out_flags
& EF_APCS_FLOAT
))
1936 /* If the src and dest have different interworking flags
1937 then turn off the interworking bit. */
1938 if ((in_flags
& EF_INTERWORK
) != (out_flags
& EF_INTERWORK
))
1940 if (out_flags
& EF_INTERWORK
)
1941 _bfd_error_handler (_ ("\
1942 Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
1943 bfd_get_filename (obfd
), bfd_get_filename (ibfd
));
1945 in_flags
&= ~EF_INTERWORK
;
1949 elf_elfheader (obfd
)->e_flags
= in_flags
;
1950 elf_flags_init (obfd
) = true;
1955 /* Merge backend specific data from an object file to the output
1956 object file when linking. */
1958 elf32_arm_merge_private_bfd_data (ibfd
, obfd
)
1965 if ( bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1966 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1969 /* Check if we have the same endianess */
1970 if ( ibfd
->xvec
->byteorder
!= obfd
->xvec
->byteorder
1971 && obfd
->xvec
->byteorder
!= BFD_ENDIAN_UNKNOWN
1972 && ibfd
->xvec
->byteorder
!= BFD_ENDIAN_UNKNOWN
)
1974 (*_bfd_error_handler
)
1975 (_("%s: compiled for a %s endian system and target is %s endian"),
1976 bfd_get_filename (ibfd
),
1977 bfd_big_endian (ibfd
) ? "big" : "little",
1978 bfd_big_endian (obfd
) ? "big" : "little");
1980 bfd_set_error (bfd_error_wrong_format
);
1984 /* The input BFD must have had its flags initialised. */
1985 /* The following seems bogus to me -- The flags are initialized in
1986 the assembler but I don't think an elf_flags_init field is
1987 written into the object */
1988 /* BFD_ASSERT (elf_flags_init (ibfd)); */
1990 in_flags
= elf_elfheader (ibfd
)->e_flags
;
1991 out_flags
= elf_elfheader (obfd
)->e_flags
;
1993 if (!elf_flags_init (obfd
))
1995 /* If the input is the default architecture then do not
1996 bother setting the flags for the output architecture,
1997 instead allow future merges to do this. If no future
1998 merges ever set these flags then they will retain their
1999 unitialised values, which surprise surprise, correspond
2000 to the default values. */
2001 if (bfd_get_arch_info (ibfd
)->the_default
)
2004 elf_flags_init (obfd
) = true;
2005 elf_elfheader (obfd
)->e_flags
= in_flags
;
2007 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
2008 && bfd_get_arch_info (obfd
)->the_default
)
2009 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
2014 /* Check flag compatibility. */
2015 if (in_flags
== out_flags
)
2018 /* Complain about various flag mismatches. */
2020 if ((in_flags
& EF_APCS_26
) != (out_flags
& EF_APCS_26
))
2021 _bfd_error_handler (_ ("\
2022 Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
2023 bfd_get_filename (ibfd
),
2024 in_flags
& EF_APCS_26
? 26 : 32,
2025 bfd_get_filename (obfd
),
2026 out_flags
& EF_APCS_26
? 26 : 32);
2028 if ((in_flags
& EF_APCS_FLOAT
) != (out_flags
& EF_APCS_FLOAT
))
2029 _bfd_error_handler (_ ("\
2030 Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
2031 bfd_get_filename (ibfd
),
2032 in_flags
& EF_APCS_FLOAT
? _ ("float") : _ ("integer"),
2033 bfd_get_filename (obfd
),
2034 out_flags
& EF_APCS_26
? _ ("float") : _ ("integer"));
2036 if ((in_flags
& EF_PIC
) != (out_flags
& EF_PIC
))
2037 _bfd_error_handler (_ ("\
2038 Error: %s is compiled as position %s code, whereas %s is not"),
2039 bfd_get_filename (ibfd
),
2040 in_flags
& EF_PIC
? _ ("independent") : _ ("dependent"),
2041 bfd_get_filename (obfd
));
2043 /* Interworking mismatch is only a warning. */
2044 if ((in_flags
& EF_INTERWORK
) != (out_flags
& EF_INTERWORK
))
2046 _bfd_error_handler (_ ("\
2047 Warning: %s %s interworking, whereas %s %s"),
2048 bfd_get_filename (ibfd
),
2049 in_flags
& EF_INTERWORK
? _ ("supports") : _ ("does not support"),
2050 bfd_get_filename (obfd
),
2051 out_flags
& EF_INTERWORK
? _ ("does not") : _ ("does"));
2058 /* Display the flags field */
2060 elf32_arm_print_private_bfd_data (abfd
, ptr
)
2064 FILE *file
= (FILE *) ptr
;
2066 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
2068 /* Print normal ELF private data. */
2069 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
2071 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
2073 /* xgettext:c-format */
2074 fprintf (file
, _ ("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
2076 if (elf_elfheader (abfd
)->e_flags
& EF_INTERWORK
)
2077 fprintf (file
, _ (" [interworking enabled]"));
2079 fprintf (file
, _ (" [interworking not enabled]"));
2081 if (elf_elfheader (abfd
)->e_flags
& EF_APCS_26
)
2082 fprintf (file
, _ (" [APCS-26]"));
2084 fprintf (file
, _ (" [APCS-32]"));
2086 if (elf_elfheader (abfd
)->e_flags
& EF_APCS_FLOAT
)
2087 fprintf (file
, _ (" [floats passed in float registers]"));
2089 fprintf (file
, _ (" [floats passed in integer registers]"));
2091 if (elf_elfheader (abfd
)->e_flags
& EF_PIC
)
2092 fprintf (file
, _ (" [position independent]"));
2094 fprintf (file
, _ (" [absolute position]"));
2102 elf32_arm_get_symbol_type (elf_sym
, type
)
2103 Elf_Internal_Sym
* elf_sym
;
2106 if (ELF_ST_TYPE (elf_sym
->st_info
) == STT_ARM_TFUNC
)
2107 return ELF_ST_TYPE (elf_sym
->st_info
);
2113 elf32_arm_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2115 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2116 Elf_Internal_Rela
*rel
;
2117 struct elf_link_hash_entry
*h
;
2118 Elf_Internal_Sym
*sym
;
2122 switch (ELF32_R_TYPE (rel
->r_info
))
2124 case R_ARM_GNU_VTINHERIT
:
2125 case R_ARM_GNU_VTENTRY
:
2129 switch (h
->root
.type
)
2131 case bfd_link_hash_defined
:
2132 case bfd_link_hash_defweak
:
2133 return h
->root
.u
.def
.section
;
2135 case bfd_link_hash_common
:
2136 return h
->root
.u
.c
.p
->section
;
2145 if (!(elf_bad_symtab (abfd
)
2146 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
2147 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
2148 && sym
->st_shndx
!= SHN_COMMON
))
2150 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2156 /* Update the got entry reference counts for the section being removed. */
2159 elf32_arm_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2160 bfd
*abfd ATTRIBUTE_UNUSED
;
2161 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2162 asection
*sec ATTRIBUTE_UNUSED
;
2163 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
;
2165 /* We don't support garbage collection of GOT and PLT relocs yet. */
2169 /* Look through the relocs for a section during the first phase. */
2172 elf32_arm_check_relocs (abfd
, info
, sec
, relocs
)
2174 struct bfd_link_info
* info
;
2176 const Elf_Internal_Rela
* relocs
;
2178 Elf_Internal_Shdr
* symtab_hdr
;
2179 struct elf_link_hash_entry
** sym_hashes
;
2180 struct elf_link_hash_entry
** sym_hashes_end
;
2181 const Elf_Internal_Rela
* rel
;
2182 const Elf_Internal_Rela
* rel_end
;
2184 asection
* sgot
, *srelgot
, *sreloc
;
2185 bfd_vma
* local_got_offsets
;
2187 if (info
->relocateable
)
2190 sgot
= srelgot
= sreloc
= NULL
;
2192 dynobj
= elf_hash_table (info
)->dynobj
;
2193 local_got_offsets
= elf_local_got_offsets (abfd
);
2195 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2196 sym_hashes
= elf_sym_hashes (abfd
);
2197 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
2198 if (!elf_bad_symtab (abfd
))
2199 sym_hashes_end
-= symtab_hdr
->sh_info
;
2201 rel_end
= relocs
+ sec
->reloc_count
;
2202 for (rel
= relocs
; rel
< rel_end
; rel
++)
2204 struct elf_link_hash_entry
*h
;
2205 unsigned long r_symndx
;
2207 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2208 if (r_symndx
< symtab_hdr
->sh_info
)
2211 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2213 /* Some relocs require a global offset table. */
2216 switch (ELF32_R_TYPE (rel
->r_info
))
2221 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2222 if (! _bfd_elf_create_got_section (dynobj
, info
))
2231 switch (ELF32_R_TYPE (rel
->r_info
))
2234 /* This symbol requires a global offset table entry. */
2237 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2238 BFD_ASSERT (sgot
!= NULL
);
2241 /* Get the got relocation section if necessary. */
2243 && (h
!= NULL
|| info
->shared
))
2245 srelgot
= bfd_get_section_by_name (dynobj
, ".rel.got");
2247 /* If no got relocation section, make one and initialize. */
2248 if (srelgot
== NULL
)
2250 srelgot
= bfd_make_section (dynobj
, ".rel.got");
2252 || ! bfd_set_section_flags (dynobj
, srelgot
,
2257 | SEC_LINKER_CREATED
2259 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2266 if (h
->got
.offset
!= (bfd_vma
) -1)
2267 /* We have already allocated space in the .got. */
2270 h
->got
.offset
= sgot
->_raw_size
;
2272 /* Make sure this symbol is output as a dynamic symbol. */
2273 if (h
->dynindx
== -1)
2274 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2277 srelgot
->_raw_size
+= sizeof (Elf32_External_Rel
);
2281 /* This is a global offset table entry for a local
2283 if (local_got_offsets
== NULL
)
2286 register unsigned int i
;
2288 size
= symtab_hdr
->sh_info
* sizeof (bfd_vma
);
2289 local_got_offsets
= (bfd_vma
*) bfd_alloc (abfd
, size
);
2290 if (local_got_offsets
== NULL
)
2292 elf_local_got_offsets (abfd
) = local_got_offsets
;
2293 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
2294 local_got_offsets
[i
] = (bfd_vma
) -1;
2297 if (local_got_offsets
[r_symndx
] != (bfd_vma
) -1)
2298 /* We have already allocated space in the .got. */
2301 local_got_offsets
[r_symndx
] = sgot
->_raw_size
;
2304 /* If we are generating a shared object, we need to
2305 output a R_ARM_RELATIVE reloc so that the dynamic
2306 linker can adjust this GOT entry. */
2307 srelgot
->_raw_size
+= sizeof (Elf32_External_Rel
);
2310 sgot
->_raw_size
+= 4;
2314 /* This symbol requires a procedure linkage table entry. We
2315 actually build the entry in adjust_dynamic_symbol,
2316 because this might be a case of linking PIC code which is
2317 never referenced by a dynamic object, in which case we
2318 don't need to generate a procedure linkage table entry
2321 /* If this is a local symbol, we resolve it directly without
2322 creating a procedure linkage table entry. */
2326 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2332 /* If we are creating a shared library, and this is a reloc
2333 against a global symbol, or a non PC relative reloc
2334 against a local symbol, then we need to copy the reloc
2335 into the shared library. However, if we are linking with
2336 -Bsymbolic, we do not need to copy a reloc against a
2337 global symbol which is defined in an object we are
2338 including in the link (i.e., DEF_REGULAR is set). At
2339 this point we have not seen all the input files, so it is
2340 possible that DEF_REGULAR is not set now but will be set
2341 later (it is never cleared). We account for that
2342 possibility below by storing information in the
2343 pcrel_relocs_copied field of the hash table entry. */
2345 && (ELF32_R_TYPE (rel
->r_info
) != R_ARM_PC24
2347 && (! info
->symbolic
2348 || (h
->elf_link_hash_flags
2349 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
2351 /* When creating a shared object, we must copy these
2352 reloc types into the output file. We create a reloc
2353 section in dynobj and make room for this reloc. */
2358 name
= (bfd_elf_string_from_elf_section
2360 elf_elfheader (abfd
)->e_shstrndx
,
2361 elf_section_data (sec
)->rel_hdr
.sh_name
));
2365 BFD_ASSERT (strncmp (name
, ".rel", 4) == 0
2366 && strcmp (bfd_get_section_name (abfd
, sec
),
2369 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2374 sreloc
= bfd_make_section (dynobj
, name
);
2375 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2376 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2377 if ((sec
->flags
& SEC_ALLOC
) != 0)
2378 flags
|= SEC_ALLOC
| SEC_LOAD
;
2380 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2381 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
2386 sreloc
->_raw_size
+= sizeof (Elf32_External_Rel
);
2387 /* If we are linking with -Bsymbolic, and this is a
2388 global symbol, we count the number of PC relative
2389 relocations we have entered for this symbol, so that
2390 we can discard them again if the symbol is later
2391 defined by a regular object. Note that this function
2392 is only called if we are using an elf_i386 linker
2393 hash table, which means that h is really a pointer to
2394 an elf_i386_link_hash_entry. */
2395 if (h
!= NULL
&& info
->symbolic
2396 && ELF32_R_TYPE (rel
->r_info
) == R_ARM_PC24
)
2398 struct elf32_arm_link_hash_entry
* eh
;
2399 struct elf32_arm_pcrel_relocs_copied
* p
;
2401 eh
= (struct elf32_arm_link_hash_entry
*) h
;
2403 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
2404 if (p
->section
== sreloc
)
2409 p
= ((struct elf32_arm_pcrel_relocs_copied
*)
2410 bfd_alloc (dynobj
, sizeof * p
));
2414 p
->next
= eh
->pcrel_relocs_copied
;
2415 eh
->pcrel_relocs_copied
= p
;
2416 p
->section
= sreloc
;
2425 /* This relocation describes the C++ object vtable hierarchy.
2426 Reconstruct it for later use during GC. */
2427 case R_ARM_GNU_VTINHERIT
:
2428 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2432 /* This relocation describes which C++ vtable entries are actually
2433 used. Record for later use during GC. */
2434 case R_ARM_GNU_VTENTRY
:
2435 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2445 /* Find the nearest line to a particular section and offset, for error
2446 reporting. This code is a duplicate of the code in elf.c, except
2447 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
2450 elf32_arm_find_nearest_line
2451 (abfd
, section
, symbols
, offset
, filename_ptr
, functionname_ptr
, line_ptr
)
2456 CONST
char ** filename_ptr
;
2457 CONST
char ** functionname_ptr
;
2458 unsigned int * line_ptr
;
2461 const char * filename
;
2466 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
2467 filename_ptr
, functionname_ptr
,
2471 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
2472 &found
, filename_ptr
,
2473 functionname_ptr
, line_ptr
,
2474 &elf_tdata (abfd
)->line_info
))
2480 if (symbols
== NULL
)
2487 for (p
= symbols
; *p
!= NULL
; p
++)
2491 q
= (elf_symbol_type
*) *p
;
2493 if (bfd_get_section (&q
->symbol
) != section
)
2496 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
2501 filename
= bfd_asymbol_name (&q
->symbol
);
2506 if (q
->symbol
.section
== section
2507 && q
->symbol
.value
>= low_func
2508 && q
->symbol
.value
<= offset
)
2510 func
= (asymbol
*) q
;
2511 low_func
= q
->symbol
.value
;
2520 *filename_ptr
= filename
;
2521 *functionname_ptr
= bfd_asymbol_name (func
);
2527 /* Adjust a symbol defined by a dynamic object and referenced by a
2528 regular object. The current definition is in some section of the
2529 dynamic object, but we're not including those sections. We have to
2530 change the definition to something the rest of the link can
2534 elf32_arm_adjust_dynamic_symbol (info
, h
)
2535 struct bfd_link_info
* info
;
2536 struct elf_link_hash_entry
* h
;
2540 unsigned int power_of_two
;
2542 dynobj
= elf_hash_table (info
)->dynobj
;
2544 /* Make sure we know what is going on here. */
2545 BFD_ASSERT (dynobj
!= NULL
2546 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
2547 || h
->weakdef
!= NULL
2548 || ((h
->elf_link_hash_flags
2549 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2550 && (h
->elf_link_hash_flags
2551 & ELF_LINK_HASH_REF_REGULAR
) != 0
2552 && (h
->elf_link_hash_flags
2553 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
2555 /* If this is a function, put it in the procedure linkage table. We
2556 will fill in the contents of the procedure linkage table later,
2557 when we know the address of the .got section. */
2558 if (h
->type
== STT_FUNC
2559 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
2562 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
2563 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0)
2565 /* This case can occur if we saw a PLT32 reloc in an input
2566 file, but the symbol was never referred to by a dynamic
2567 object. In such a case, we don't actually need to build
2568 a procedure linkage table, and we can just do a PC32
2570 BFD_ASSERT ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0);
2574 /* Make sure this symbol is output as a dynamic symbol. */
2575 if (h
->dynindx
== -1)
2577 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2581 s
= bfd_get_section_by_name (dynobj
, ".plt");
2582 BFD_ASSERT (s
!= NULL
);
2584 /* If this is the first .plt entry, make room for the special
2586 if (s
->_raw_size
== 0)
2587 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2589 /* If this symbol is not defined in a regular file, and we are
2590 not generating a shared library, then set the symbol to this
2591 location in the .plt. This is required to make function
2592 pointers compare as equal between the normal executable and
2593 the shared library. */
2595 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2597 h
->root
.u
.def
.section
= s
;
2598 h
->root
.u
.def
.value
= s
->_raw_size
;
2601 h
->plt
.offset
= s
->_raw_size
;
2603 /* Make room for this entry. */
2604 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2606 /* We also need to make an entry in the .got.plt section, which
2607 will be placed in the .got section by the linker script. */
2609 s
= bfd_get_section_by_name (dynobj
, ".got.plt");
2610 BFD_ASSERT (s
!= NULL
);
2613 /* We also need to make an entry in the .rel.plt section. */
2615 s
= bfd_get_section_by_name (dynobj
, ".rel.plt");
2616 BFD_ASSERT (s
!= NULL
);
2617 s
->_raw_size
+= sizeof (Elf32_External_Rel
);
2622 /* If this is a weak symbol, and there is a real definition, the
2623 processor independent code will have arranged for us to see the
2624 real definition first, and we can just use the same value. */
2625 if (h
->weakdef
!= NULL
)
2627 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
2628 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
2629 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
2630 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
2634 /* This is a reference to a symbol defined by a dynamic object which
2635 is not a function. */
2637 /* If we are creating a shared library, we must presume that the
2638 only references to the symbol are via the global offset table.
2639 For such cases we need not do anything here; the relocations will
2640 be handled correctly by relocate_section. */
2644 /* We must allocate the symbol in our .dynbss section, which will
2645 become part of the .bss section of the executable. There will be
2646 an entry for this symbol in the .dynsym section. The dynamic
2647 object will contain position independent code, so all references
2648 from the dynamic object to this symbol will go through the global
2649 offset table. The dynamic linker will use the .dynsym entry to
2650 determine the address it must put in the global offset table, so
2651 both the dynamic object and the regular object will refer to the
2652 same memory location for the variable. */
2654 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
2655 BFD_ASSERT (s
!= NULL
);
2657 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2658 copy the initial value out of the dynamic object and into the
2659 runtime process image. We need to remember the offset into the
2660 .rel.bss section we are going to use. */
2661 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2665 srel
= bfd_get_section_by_name (dynobj
, ".rel.bss");
2666 BFD_ASSERT (srel
!= NULL
);
2667 srel
->_raw_size
+= sizeof (Elf32_External_Rel
);
2668 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
2671 /* We need to figure out the alignment required for this symbol. I
2672 have no idea how ELF linkers handle this. */
2673 power_of_two
= bfd_log2 (h
->size
);
2674 if (power_of_two
> 3)
2677 /* Apply the required alignment. */
2678 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
2679 (bfd_size_type
) (1 << power_of_two
));
2680 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
2682 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
2686 /* Define the symbol as being at this point in the section. */
2687 h
->root
.u
.def
.section
= s
;
2688 h
->root
.u
.def
.value
= s
->_raw_size
;
2690 /* Increment the section size to make room for the symbol. */
2691 s
->_raw_size
+= h
->size
;
2696 /* Set the sizes of the dynamic sections. */
2699 elf32_arm_size_dynamic_sections (output_bfd
, info
)
2701 struct bfd_link_info
* info
;
2709 dynobj
= elf_hash_table (info
)->dynobj
;
2710 BFD_ASSERT (dynobj
!= NULL
);
2712 if (elf_hash_table (info
)->dynamic_sections_created
)
2714 /* Set the contents of the .interp section to the interpreter. */
2717 s
= bfd_get_section_by_name (dynobj
, ".interp");
2718 BFD_ASSERT (s
!= NULL
);
2719 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2720 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2725 /* We may have created entries in the .rel.got section.
2726 However, if we are not creating the dynamic sections, we will
2727 not actually use these entries. Reset the size of .rel.got,
2728 which will cause it to get stripped from the output file
2730 s
= bfd_get_section_by_name (dynobj
, ".rel.got");
2735 /* If this is a -Bsymbolic shared link, then we need to discard all
2736 PC relative relocs against symbols defined in a regular object.
2737 We allocated space for them in the check_relocs routine, but we
2738 will not fill them in in the relocate_section routine. */
2739 if (info
->shared
&& info
->symbolic
)
2740 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info
),
2741 elf32_arm_discard_copies
,
2744 /* The check_relocs and adjust_dynamic_symbol entry points have
2745 determined the sizes of the various dynamic sections. Allocate
2750 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2755 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2758 /* It's OK to base decisions on the section name, because none
2759 of the dynobj section names depend upon the input files. */
2760 name
= bfd_get_section_name (dynobj
, s
);
2764 if (strcmp (name
, ".plt") == 0)
2766 if (s
->_raw_size
== 0)
2768 /* Strip this section if we don't need it; see the
2774 /* Remember whether there is a PLT. */
2778 else if (strncmp (name
, ".rel", 4) == 0)
2780 if (s
->_raw_size
== 0)
2782 /* If we don't need this section, strip it from the
2783 output file. This is mostly to handle .rel.bss and
2784 .rel.plt. We must create both sections in
2785 create_dynamic_sections, because they must be created
2786 before the linker maps input sections to output
2787 sections. The linker does that before
2788 adjust_dynamic_symbol is called, and it is that
2789 function which decides whether anything needs to go
2790 into these sections. */
2797 /* Remember whether there are any reloc sections other
2799 if (strcmp (name
, ".rel.plt") != 0)
2801 const char *outname
;
2805 /* If this relocation section applies to a read only
2806 section, then we probably need a DT_TEXTREL
2807 entry. The entries in the .rel.plt section
2808 really apply to the .got section, which we
2809 created ourselves and so know is not readonly. */
2810 outname
= bfd_get_section_name (output_bfd
,
2812 target
= bfd_get_section_by_name (output_bfd
, outname
+ 4);
2814 && (target
->flags
& SEC_READONLY
) != 0
2815 && (target
->flags
& SEC_ALLOC
) != 0)
2819 /* We use the reloc_count field as a counter if we need
2820 to copy relocs into the output file. */
2824 else if (strncmp (name
, ".got", 4) != 0)
2826 /* It's not one of our sections, so don't allocate space. */
2834 for (spp
= &s
->output_section
->owner
->sections
;
2835 *spp
!= s
->output_section
;
2836 spp
= &(*spp
)->next
)
2838 *spp
= s
->output_section
->next
;
2839 --s
->output_section
->owner
->section_count
;
2844 /* Allocate memory for the section contents. */
2845 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2846 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2850 if (elf_hash_table (info
)->dynamic_sections_created
)
2852 /* Add some entries to the .dynamic section. We fill in the
2853 values later, in elf32_arm_finish_dynamic_sections, but we
2854 must add the entries now so that we get the correct size for
2855 the .dynamic section. The DT_DEBUG entry is filled in by the
2856 dynamic linker and used by the debugger. */
2859 if (! bfd_elf32_add_dynamic_entry (info
, DT_DEBUG
, 0))
2865 if (! bfd_elf32_add_dynamic_entry (info
, DT_PLTGOT
, 0)
2866 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
2867 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
2868 || ! bfd_elf32_add_dynamic_entry (info
, DT_JMPREL
, 0))
2874 if (! bfd_elf32_add_dynamic_entry (info
, DT_REL
, 0)
2875 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELSZ
, 0)
2876 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELENT
,
2877 sizeof (Elf32_External_Rel
)))
2883 if (! bfd_elf32_add_dynamic_entry (info
, DT_TEXTREL
, 0))
2891 /* This function is called via elf32_arm_link_hash_traverse if we are
2892 creating a shared object with -Bsymbolic. It discards the space
2893 allocated to copy PC relative relocs against symbols which are
2894 defined in regular objects. We allocated space for them in the
2895 check_relocs routine, but we won't fill them in in the
2896 relocate_section routine. */
2899 elf32_arm_discard_copies (h
, ignore
)
2900 struct elf32_arm_link_hash_entry
* h
;
2901 PTR ignore ATTRIBUTE_UNUSED
;
2903 struct elf32_arm_pcrel_relocs_copied
* s
;
2905 /* We only discard relocs for symbols defined in a regular object. */
2906 if ((h
->root
.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2909 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
2910 s
->section
->_raw_size
-= s
->count
* sizeof (Elf32_External_Rel
);
2915 /* Finish up dynamic symbol handling. We set the contents of various
2916 dynamic sections here. */
2919 elf32_arm_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2921 struct bfd_link_info
* info
;
2922 struct elf_link_hash_entry
* h
;
2923 Elf_Internal_Sym
* sym
;
2927 dynobj
= elf_hash_table (info
)->dynobj
;
2929 if (h
->plt
.offset
!= (bfd_vma
) -1)
2936 Elf_Internal_Rel rel
;
2938 /* This symbol has an entry in the procedure linkage table. Set
2941 BFD_ASSERT (h
->dynindx
!= -1);
2943 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2944 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
2945 srel
= bfd_get_section_by_name (dynobj
, ".rel.plt");
2946 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srel
!= NULL
);
2948 /* Get the index in the procedure linkage table which
2949 corresponds to this symbol. This is the index of this symbol
2950 in all the symbols for which we are making plt entries. The
2951 first entry in the procedure linkage table is reserved. */
2952 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2954 /* Get the offset into the .got table of the entry that
2955 corresponds to this function. Each .got entry is 4 bytes.
2956 The first three are reserved. */
2957 got_offset
= (plt_index
+ 3) * 4;
2959 /* Fill in the entry in the procedure linkage table. */
2960 memcpy (splt
->contents
+ h
->plt
.offset
,
2961 elf32_arm_plt_entry
,
2963 bfd_put_32 (output_bfd
,
2964 (sgot
->output_section
->vma
2965 + sgot
->output_offset
2967 - splt
->output_section
->vma
2968 - splt
->output_offset
2969 - h
->plt
.offset
- 12),
2970 splt
->contents
+ h
->plt
.offset
+ 12);
2972 /* Fill in the entry in the global offset table. */
2973 bfd_put_32 (output_bfd
,
2974 (splt
->output_section
->vma
2975 + splt
->output_offset
),
2976 sgot
->contents
+ got_offset
);
2978 /* Fill in the entry in the .rel.plt section. */
2979 rel
.r_offset
= (sgot
->output_section
->vma
2980 + sgot
->output_offset
2982 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_JUMP_SLOT
);
2983 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
2984 ((Elf32_External_Rel
*) srel
->contents
2987 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2989 /* Mark the symbol as undefined, rather than as defined in
2990 the .plt section. Leave the value alone. */
2991 sym
->st_shndx
= SHN_UNDEF
;
2995 if (h
->got
.offset
!= (bfd_vma
) -1)
2999 Elf_Internal_Rel rel
;
3001 /* This symbol has an entry in the global offset table. Set it
3004 sgot
= bfd_get_section_by_name (dynobj
, ".got");
3005 srel
= bfd_get_section_by_name (dynobj
, ".rel.got");
3006 BFD_ASSERT (sgot
!= NULL
&& srel
!= NULL
);
3008 rel
.r_offset
= (sgot
->output_section
->vma
3009 + sgot
->output_offset
3010 + (h
->got
.offset
&~ 1));
3012 /* If this is a -Bsymbolic link, and the symbol is defined
3013 locally, we just want to emit a RELATIVE reloc. The entry in
3014 the global offset table will already have been initialized in
3015 the relocate_section function. */
3017 && (info
->symbolic
|| h
->dynindx
== -1)
3018 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
3019 rel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
3022 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
3023 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
3026 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3027 ((Elf32_External_Rel
*) srel
->contents
3028 + srel
->reloc_count
));
3029 ++srel
->reloc_count
;
3032 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
3035 Elf_Internal_Rel rel
;
3037 /* This symbol needs a copy reloc. Set it up. */
3039 BFD_ASSERT (h
->dynindx
!= -1
3040 && (h
->root
.type
== bfd_link_hash_defined
3041 || h
->root
.type
== bfd_link_hash_defweak
));
3043 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
3045 BFD_ASSERT (s
!= NULL
);
3047 rel
.r_offset
= (h
->root
.u
.def
.value
3048 + h
->root
.u
.def
.section
->output_section
->vma
3049 + h
->root
.u
.def
.section
->output_offset
);
3050 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
3051 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3052 ((Elf32_External_Rel
*) s
->contents
3057 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3058 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3059 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
3060 sym
->st_shndx
= SHN_ABS
;
3065 /* Finish up the dynamic sections. */
3068 elf32_arm_finish_dynamic_sections (output_bfd
, info
)
3070 struct bfd_link_info
* info
;
3076 dynobj
= elf_hash_table (info
)->dynobj
;
3078 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
3079 BFD_ASSERT (sgot
!= NULL
);
3080 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3082 if (elf_hash_table (info
)->dynamic_sections_created
)
3085 Elf32_External_Dyn
*dyncon
, *dynconend
;
3087 splt
= bfd_get_section_by_name (dynobj
, ".plt");
3088 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3090 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3091 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
3092 for (; dyncon
< dynconend
; dyncon
++)
3094 Elf_Internal_Dyn dyn
;
3098 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3111 s
= bfd_get_section_by_name (output_bfd
, name
);
3112 BFD_ASSERT (s
!= NULL
);
3113 dyn
.d_un
.d_ptr
= s
->vma
;
3114 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3118 s
= bfd_get_section_by_name (output_bfd
, ".rel.plt");
3119 BFD_ASSERT (s
!= NULL
);
3120 if (s
->_cooked_size
!= 0)
3121 dyn
.d_un
.d_val
= s
->_cooked_size
;
3123 dyn
.d_un
.d_val
= s
->_raw_size
;
3124 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3128 /* My reading of the SVR4 ABI indicates that the
3129 procedure linkage table relocs (DT_JMPREL) should be
3130 included in the overall relocs (DT_REL). This is
3131 what Solaris does. However, UnixWare can not handle
3132 that case. Therefore, we override the DT_RELSZ entry
3133 here to make it not include the JMPREL relocs. Since
3134 the linker script arranges for .rel.plt to follow all
3135 other relocation sections, we don't have to worry
3136 about changing the DT_REL entry. */
3137 s
= bfd_get_section_by_name (output_bfd
, ".rel.plt");
3140 if (s
->_cooked_size
!= 0)
3141 dyn
.d_un
.d_val
-= s
->_cooked_size
;
3143 dyn
.d_un
.d_val
-= s
->_raw_size
;
3145 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3150 /* Fill in the first entry in the procedure linkage table. */
3151 if (splt
->_raw_size
> 0)
3152 memcpy (splt
->contents
, elf32_arm_plt0_entry
, PLT_ENTRY_SIZE
);
3154 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3155 really seem like the right value. */
3156 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3159 /* Fill in the first three entries in the global offset table. */
3160 if (sgot
->_raw_size
> 0)
3163 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3165 bfd_put_32 (output_bfd
,
3166 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3168 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
3169 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
3172 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3178 elf32_arm_post_process_headers (abfd
, link_info
)
3180 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
;
3182 Elf_Internal_Ehdr
* i_ehdrp
; /* Elf file header, internal form */
3184 i_ehdrp
= elf_elfheader (abfd
);
3186 i_ehdrp
->e_ident
[EI_OSABI
] = ARM_ELF_OS_ABI_VERSION
;
3187 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
3191 #define ELF_ARCH bfd_arch_arm
3192 #define ELF_MACHINE_CODE EM_ARM
3193 #define ELF_MAXPAGESIZE 0x8000
3196 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3197 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
3198 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3199 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3200 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
3201 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
3202 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3204 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3205 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3206 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3207 #define elf_backend_check_relocs elf32_arm_check_relocs
3208 #define elf_backend_relocate_section elf32_arm_relocate_section
3209 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3210 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3211 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3212 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3213 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
3214 #define elf_backend_post_process_headers elf32_arm_post_process_headers
3216 #define elf_backend_can_gc_sections 1
3217 #define elf_backend_plt_readonly 1
3218 #define elf_backend_want_got_plt 1
3219 #define elf_backend_want_plt_sym 0
3221 #define elf_backend_got_header_size 12
3222 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
3224 #include "elf32-target.h"