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 calles 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, #-4] */
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 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
550 sec
= bfd_make_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
);
553 || !bfd_set_section_flags (abfd
, sec
, flags
)
554 || !bfd_set_section_alignment (abfd
, sec
, 2))
558 sec
= bfd_get_section_by_name (abfd
, THUMB2ARM_GLUE_SECTION_NAME
);
562 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
564 sec
= bfd_make_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
);
567 || !bfd_set_section_flags (abfd
, sec
, flags
)
568 || !bfd_set_section_alignment (abfd
, sec
, 2))
572 /* Save the bfd for later use. */
573 globals
->bfd_of_glue_owner
= abfd
;
579 bfd_elf32_arm_process_before_allocation (abfd
, link_info
, no_pipeline_knowledge
)
581 struct bfd_link_info
*link_info
;
582 int no_pipeline_knowledge
;
584 Elf_Internal_Shdr
*symtab_hdr
;
585 Elf_Internal_Rela
*free_relocs
= NULL
;
586 Elf_Internal_Rela
*irel
, *irelend
;
587 bfd_byte
*contents
= NULL
;
588 bfd_byte
*free_contents
= NULL
;
589 Elf32_External_Sym
*extsyms
= NULL
;
590 Elf32_External_Sym
*free_extsyms
= NULL
;
593 struct elf32_arm_link_hash_table
*globals
;
595 /* If we are only performing a partial link do not bother
596 to construct any glue. */
597 if (link_info
->relocateable
)
600 /* Here we have a bfd that is to be included on the link. We have a hook
601 to do reloc rummaging, before section sizes are nailed down. */
603 globals
= elf32_arm_hash_table (link_info
);
605 BFD_ASSERT (globals
!= NULL
);
606 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
608 globals
->no_pipeline_knowledge
= no_pipeline_knowledge
;
610 /* Rummage around all the relocs and map the glue vectors. */
611 sec
= abfd
->sections
;
616 for (; sec
!= NULL
; sec
= sec
->next
)
618 if (sec
->reloc_count
== 0)
621 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
622 /* Load the relocs. */
624 irel
= (_bfd_elf32_link_read_relocs (abfd
, sec
, (PTR
) NULL
,
625 (Elf_Internal_Rela
*) NULL
, false));
627 BFD_ASSERT (irel
!= 0);
629 irelend
= irel
+ sec
->reloc_count
;
630 for (; irel
< irelend
; irel
++)
633 unsigned long r_index
;
635 struct elf_link_hash_entry
*h
;
637 r_type
= ELF32_R_TYPE (irel
->r_info
);
638 r_index
= ELF32_R_SYM (irel
->r_info
);
640 /* These are the only relocation types we care about */
641 if ( r_type
!= R_ARM_PC24
642 && r_type
!= R_ARM_THM_PC22
)
645 /* Get the section contents if we haven't done so already. */
646 if (contents
== NULL
)
648 /* Get cached copy if it exists. */
649 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
650 contents
= elf_section_data (sec
)->this_hdr
.contents
;
653 /* Go get them off disk. */
654 contents
= (bfd_byte
*) bfd_malloc (sec
->_raw_size
);
655 if (contents
== NULL
)
657 free_contents
= contents
;
659 if (!bfd_get_section_contents (abfd
, sec
, contents
,
660 (file_ptr
) 0, sec
->_raw_size
))
665 /* Read this BFD's symbols if we haven't done so already. */
668 /* Get cached copy if it exists. */
669 if (symtab_hdr
->contents
!= NULL
)
670 extsyms
= (Elf32_External_Sym
*) symtab_hdr
->contents
;
673 /* Go get them off disk. */
674 extsyms
= ((Elf32_External_Sym
*)
675 bfd_malloc (symtab_hdr
->sh_size
));
678 free_extsyms
= extsyms
;
679 if (bfd_seek (abfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
680 || (bfd_read (extsyms
, 1, symtab_hdr
->sh_size
, abfd
)
681 != symtab_hdr
->sh_size
))
686 /* If the relocation is not against a symbol it cannot concern us. */
690 /* We don't care about local symbols */
691 if (r_index
< symtab_hdr
->sh_info
)
694 /* This is an external symbol */
695 r_index
-= symtab_hdr
->sh_info
;
696 h
= (struct elf_link_hash_entry
*)
697 elf_sym_hashes (abfd
)[r_index
];
699 /* If the relocation is against a static symbol it must be within
700 the current section and so cannot be a cross ARM/Thumb relocation. */
707 /* This one is a call from arm code. We need to look up
708 the target of the call. If it is a thumb target, we
711 if (ELF_ST_TYPE(h
->type
) == STT_ARM_TFUNC
)
712 record_arm_to_thumb_glue (link_info
, h
);
716 /* This one is a call from thumb code. We look
717 up the target of the call. If it is not a thumb
718 target, we insert glue. */
720 if (ELF_ST_TYPE (h
->type
) != STT_ARM_TFUNC
)
721 record_thumb_to_arm_glue (link_info
, h
);
732 if (free_relocs
!= NULL
)
734 if (free_contents
!= NULL
)
735 free (free_contents
);
736 if (free_extsyms
!= NULL
)
742 /* The thumb form of a long branch is a bit finicky, because the offset
743 encoding is split over two fields, each in it's own instruction. They
744 can occur in any order. So given a thumb form of long branch, and an
745 offset, insert the offset into the thumb branch and return finished
748 It takes two thumb instructions to encode the target address. Each has
749 11 bits to invest. The upper 11 bits are stored in one (identifed by
750 H-0.. see below), the lower 11 bits are stored in the other (identified
753 Combine together and shifted left by 1 (it's a half word address) and
757 H-0, upper address-0 = 000
759 H-1, lower address-0 = 800
761 They can be ordered either way, but the arm tools I've seen always put
762 the lower one first. It probably doesn't matter. krk@cygnus.com
764 XXX: Actually the order does matter. The second instruction (H-1)
765 moves the computed address into the PC, so it must be the second one
766 in the sequence. The problem, however is that whilst little endian code
767 stores the instructions in HI then LOW order, big endian code does the
768 reverse. nickc@cygnus.com */
770 #define LOW_HI_ORDER 0xF800F000
771 #define HI_LOW_ORDER 0xF000F800
774 insert_thumb_branch (br_insn
, rel_off
)
778 unsigned int low_bits
;
779 unsigned int high_bits
;
782 BFD_ASSERT ((rel_off
& 1) != 1);
784 rel_off
>>= 1; /* half word aligned address */
785 low_bits
= rel_off
& 0x000007FF; /* the bottom 11 bits */
786 high_bits
= (rel_off
>> 11) & 0x000007FF; /* the top 11 bits */
788 if ((br_insn
& LOW_HI_ORDER
) == LOW_HI_ORDER
)
789 br_insn
= LOW_HI_ORDER
| (low_bits
<< 16) | high_bits
;
790 else if ((br_insn
& HI_LOW_ORDER
) == HI_LOW_ORDER
)
791 br_insn
= HI_LOW_ORDER
| (high_bits
<< 16) | low_bits
;
793 abort (); /* error - not a valid branch instruction form */
795 /* FIXME: abort is probably not the right call. krk@cygnus.com */
800 /* Thumb code calling an ARM function */
802 elf32_thumb_to_arm_stub (info
, name
, input_bfd
, output_bfd
, input_section
,
803 hit_data
, sym_sec
, offset
, addend
, val
)
804 struct bfd_link_info
* info
;
808 asection
* input_section
;
812 bfd_signed_vma addend
;
817 unsigned long int tmp
;
819 struct elf_link_hash_entry
* myh
;
820 struct elf32_arm_link_hash_table
* globals
;
822 myh
= find_thumb_glue (info
, name
, input_bfd
);
826 globals
= elf32_arm_hash_table (info
);
828 BFD_ASSERT (globals
!= NULL
);
829 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
831 my_offset
= myh
->root
.u
.def
.value
;
833 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
834 THUMB2ARM_GLUE_SECTION_NAME
);
836 BFD_ASSERT (s
!= NULL
);
837 BFD_ASSERT (s
->contents
!= NULL
);
838 BFD_ASSERT (s
->output_section
!= NULL
);
840 if ((my_offset
& 0x01) == 0x01)
843 && sym_sec
->owner
!= NULL
844 && !INTERWORK_FLAG (sym_sec
->owner
))
847 (_ ("%s(%s): warning: interworking not enabled."),
848 bfd_get_filename (sym_sec
->owner
), name
);
850 (_ (" first occurrence: %s: thumb call to arm"),
851 bfd_get_filename (input_bfd
));
857 myh
->root
.u
.def
.value
= my_offset
;
859 bfd_put_16 (output_bfd
, t2a1_bx_pc_insn
,
860 s
->contents
+ my_offset
);
862 bfd_put_16 (output_bfd
, t2a2_noop_insn
,
863 s
->contents
+ my_offset
+ 2);
866 ((bfd_signed_vma
) val
) /* Address of destination of the stub */
868 (s
->output_offset
/* Offset from the start of the current section to the start of the stubs. */
869 + my_offset
/* Offset of the start of this stub from the start of the stubs. */
870 + s
->output_section
->vma
) /* Address of the start of the current section. */
871 + 4 /* The branch instruction is 4 bytes into the stub. */
872 + 8); /* ARM branches work from the pc of the instruction + 8. */
874 bfd_put_32 (output_bfd
,
875 t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
876 s
->contents
+ my_offset
+ 4);
879 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
881 /* Now go back and fix up the original BL insn to point
886 - (input_section
->output_offset
890 tmp
= bfd_get_32 (input_bfd
, hit_data
891 - input_section
->vma
);
893 bfd_put_32 (output_bfd
,
894 insert_thumb_branch (tmp
, ret_offset
),
895 hit_data
- input_section
->vma
);
900 /* Arm code calling a Thumb function */
902 elf32_arm_to_thumb_stub (info
, name
, input_bfd
, output_bfd
, input_section
,
903 hit_data
, sym_sec
, offset
, addend
, val
)
904 struct bfd_link_info
* info
;
908 asection
* input_section
;
912 bfd_signed_vma addend
;
915 unsigned long int tmp
;
919 struct elf_link_hash_entry
* myh
;
920 struct elf32_arm_link_hash_table
* globals
;
922 myh
= find_arm_glue (info
, name
, input_bfd
);
926 globals
= elf32_arm_hash_table (info
);
928 BFD_ASSERT (globals
!= NULL
);
929 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
931 my_offset
= myh
->root
.u
.def
.value
;
932 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
933 ARM2THUMB_GLUE_SECTION_NAME
);
934 BFD_ASSERT (s
!= NULL
);
935 BFD_ASSERT (s
->contents
!= NULL
);
936 BFD_ASSERT (s
->output_section
!= NULL
);
938 if ((my_offset
& 0x01) == 0x01)
941 && sym_sec
->owner
!= NULL
942 && !INTERWORK_FLAG (sym_sec
->owner
))
945 (_ ("%s(%s): warning: interworking not enabled."),
946 bfd_get_filename (sym_sec
->owner
), name
);
948 (_ (" first occurrence: %s: arm call to thumb"),
949 bfd_get_filename (input_bfd
));
952 myh
->root
.u
.def
.value
= my_offset
;
954 bfd_put_32 (output_bfd
, a2t1_ldr_insn
,
955 s
->contents
+ my_offset
);
957 bfd_put_32 (output_bfd
, a2t2_bx_r12_insn
,
958 s
->contents
+ my_offset
+ 4);
960 /* It's a thumb address. Add the low order bit. */
961 bfd_put_32 (output_bfd
, val
| a2t3_func_addr_insn
,
962 s
->contents
+ my_offset
+ 8);
965 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
967 tmp
= bfd_get_32 (input_bfd
, hit_data
);
968 tmp
= tmp
& 0xFF000000;
970 /* Somehow these are both 4 too far, so subtract 8. */
971 ret_offset
= s
->output_offset
973 + s
->output_section
->vma
974 - (input_section
->output_offset
975 + input_section
->output_section
->vma
979 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
981 bfd_put_32 (output_bfd
, tmp
, hit_data
982 - input_section
->vma
);
987 /* Perform a relocation as part of a final link. */
988 static bfd_reloc_status_type
989 elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
990 input_section
, contents
, rel
, value
,
991 info
, sym_sec
, sym_name
, sym_flags
, h
)
992 reloc_howto_type
* howto
;
995 asection
* input_section
;
997 Elf_Internal_Rela
* rel
;
999 struct bfd_link_info
* info
;
1001 const char * sym_name
;
1002 unsigned char sym_flags
;
1003 struct elf_link_hash_entry
* h
;
1005 unsigned long r_type
= howto
->type
;
1006 unsigned long r_symndx
;
1007 bfd_byte
* hit_data
= contents
+ rel
->r_offset
;
1008 bfd
* dynobj
= NULL
;
1009 Elf_Internal_Shdr
* symtab_hdr
;
1010 struct elf_link_hash_entry
** sym_hashes
;
1011 bfd_vma
* local_got_offsets
;
1012 asection
* sgot
= NULL
;
1013 asection
* splt
= NULL
;
1014 asection
* sreloc
= NULL
;
1016 bfd_signed_vma signed_addend
;
1017 struct elf32_arm_link_hash_table
* globals
;
1019 globals
= elf32_arm_hash_table (info
);
1021 dynobj
= elf_hash_table (info
)->dynobj
;
1024 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1025 splt
= bfd_get_section_by_name (dynobj
, ".plt");
1027 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1028 sym_hashes
= elf_sym_hashes (input_bfd
);
1029 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1030 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1033 addend
= bfd_get_32 (input_bfd
, hit_data
) & howto
->src_mask
;
1035 if (addend
& ((howto
->src_mask
+ 1) >> 1))
1038 signed_addend
&= ~ howto
->src_mask
;
1039 signed_addend
|= addend
;
1042 signed_addend
= addend
;
1044 addend
= signed_addend
= rel
->r_addend
;
1050 return bfd_reloc_ok
;
1055 /* When generating a shared object, these relocations are copied
1056 into the output file to be resolved at run time. */
1059 && (r_type
!= R_ARM_PC24
1062 && (! info
->symbolic
1063 || (h
->elf_link_hash_flags
1064 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
1066 Elf_Internal_Rel outrel
;
1067 boolean skip
, relocate
;
1073 name
= (bfd_elf_string_from_elf_section
1075 elf_elfheader (input_bfd
)->e_shstrndx
,
1076 elf_section_data (input_section
)->rel_hdr
.sh_name
));
1078 return bfd_reloc_notsupported
;
1080 BFD_ASSERT (strncmp (name
, ".rel", 4) == 0
1081 && strcmp (bfd_get_section_name (input_bfd
,
1085 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1086 BFD_ASSERT (sreloc
!= NULL
);
1091 if (elf_section_data (input_section
)->stab_info
== NULL
)
1092 outrel
.r_offset
= rel
->r_offset
;
1097 off
= (_bfd_stab_section_offset
1098 (output_bfd
, &elf_hash_table (info
)->stab_info
,
1100 & elf_section_data (input_section
)->stab_info
,
1102 if (off
== (bfd_vma
) -1)
1104 outrel
.r_offset
= off
;
1107 outrel
.r_offset
+= (input_section
->output_section
->vma
1108 + input_section
->output_offset
);
1112 memset (&outrel
, 0, sizeof outrel
);
1115 else if (r_type
== R_ARM_PC24
)
1117 BFD_ASSERT (h
!= NULL
&& h
->dynindx
!= -1);
1118 if ((input_section
->flags
& SEC_ALLOC
) != 0)
1122 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_PC24
);
1127 || ((info
->symbolic
|| h
->dynindx
== -1)
1128 && (h
->elf_link_hash_flags
1129 & ELF_LINK_HASH_DEF_REGULAR
) != 0))
1132 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
1136 BFD_ASSERT (h
->dynindx
!= -1);
1137 if ((input_section
->flags
& SEC_ALLOC
) != 0)
1141 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_ABS32
);
1145 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1146 (((Elf32_External_Rel
*)
1148 + sreloc
->reloc_count
));
1149 ++sreloc
->reloc_count
;
1151 /* If this reloc is against an external symbol, we do not want to
1152 fiddle with the addend. Otherwise, we need to include the symbol
1153 value so that it becomes an addend for the dynamic reloc. */
1155 return bfd_reloc_ok
;
1158 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1159 contents
, rel
->r_offset
, value
,
1162 else switch (r_type
)
1165 /* Arm B/BL instruction */
1167 /* Check for arm calling thumb function. */
1168 if (sym_flags
== STT_ARM_TFUNC
)
1170 elf32_arm_to_thumb_stub (info
, sym_name
, input_bfd
, output_bfd
,
1171 input_section
, hit_data
, sym_sec
, rel
->r_offset
,
1172 signed_addend
, value
);
1173 return bfd_reloc_ok
;
1176 if ( strcmp (bfd_get_target (input_bfd
), "elf32-littlearm-oabi") == 0
1177 || strcmp (bfd_get_target (input_bfd
), "elf32-bigarm-oabi") == 0)
1179 /* The old way of doing things. Trearing the addend as a
1180 byte sized field and adding in the pipeline offset. */
1182 value
-= (input_section
->output_section
->vma
1183 + input_section
->output_offset
);
1184 value
-= rel
->r_offset
;
1187 if (! globals
->no_pipeline_knowledge
)
1192 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1194 S is the address of the symbol in the relocation.
1195 P is address of the instruction being relocated.
1196 A is the addend (extracted from the instruction) in bytes.
1198 S is held in 'value'.
1199 P is the base address of the section containing the instruction
1200 plus the offset of the reloc into that section, ie:
1201 (input_section->output_section->vma +
1202 input_section->output_offset +
1204 A is the addend, converted into bytes, ie:
1207 Note: None of these operations have knowledge of the pipeline
1208 size of the processor, thus it is up to the assembler to encode
1209 this information into the addend. */
1211 value
-= (input_section
->output_section
->vma
1212 + input_section
->output_offset
);
1213 value
-= rel
->r_offset
;
1214 value
+= (signed_addend
<< howto
->size
);
1216 /* Previous versions of this code also used to add in the pipeline
1217 offset here. This is wrong because the linker is not supposed
1218 to know about such things, and one day it might change. In order
1219 to support old binaries that need the old behaviour however, so
1220 we attempt to detect which ABI was used to create the reloc. */
1221 if (! globals
->no_pipeline_knowledge
)
1223 Elf_Internal_Ehdr
* i_ehdrp
; /* Elf file header, internal form */
1225 i_ehdrp
= elf_elfheader (input_bfd
);
1227 if (i_ehdrp
->e_ident
[EI_OSABI
] == 0)
1232 /* Perform a signed range check. */
1233 signed_addend
= value
;
1234 signed_addend
>>= howto
->rightshift
;
1235 if (signed_addend
> ((bfd_signed_vma
)(howto
->dst_mask
>> 1))
1236 || signed_addend
< - ((bfd_signed_vma
) ((howto
->dst_mask
+ 1) >> 1)))
1237 return bfd_reloc_overflow
;
1239 value
= (signed_addend
& howto
->dst_mask
)
1240 | (bfd_get_32 (input_bfd
, hit_data
) & (~ howto
->dst_mask
));
1245 if (sym_flags
== STT_ARM_TFUNC
)
1250 value
-= (input_section
->output_section
->vma
1251 + input_section
->output_offset
);
1256 bfd_put_32 (input_bfd
, value
, hit_data
);
1257 return bfd_reloc_ok
;
1261 if ((long) value
> 0x7f || (long) value
< -0x80)
1262 return bfd_reloc_overflow
;
1264 bfd_put_8 (input_bfd
, value
, hit_data
);
1265 return bfd_reloc_ok
;
1270 if ((long) value
> 0x7fff || (long) value
< -0x8000)
1271 return bfd_reloc_overflow
;
1273 bfd_put_16 (input_bfd
, value
, hit_data
);
1274 return bfd_reloc_ok
;
1277 /* Support ldr and str instruction for the arm */
1278 /* Also thumb b (unconditional branch). ??? Really? */
1281 if ((long) value
> 0x7ff || (long) value
< -0x800)
1282 return bfd_reloc_overflow
;
1284 value
|= (bfd_get_32 (input_bfd
, hit_data
) & 0xfffff000);
1285 bfd_put_32 (input_bfd
, value
, hit_data
);
1286 return bfd_reloc_ok
;
1288 case R_ARM_THM_ABS5
:
1289 /* Support ldr and str instructions for the thumb. */
1291 /* Need to refetch addend. */
1292 addend
= bfd_get_16 (input_bfd
, hit_data
) & howto
->src_mask
;
1293 /* ??? Need to determine shift amount from operand size. */
1294 addend
>>= howto
->rightshift
;
1298 /* ??? Isn't value unsigned? */
1299 if ((long) value
> 0x1f || (long) value
< -0x10)
1300 return bfd_reloc_overflow
;
1302 /* ??? Value needs to be properly shifted into place first. */
1303 value
|= bfd_get_16 (input_bfd
, hit_data
) & 0xf83f;
1304 bfd_put_16 (input_bfd
, value
, hit_data
);
1305 return bfd_reloc_ok
;
1307 case R_ARM_THM_PC22
:
1308 /* Thumb BL (branch long instruction). */
1311 boolean overflow
= false;
1312 bfd_vma upper_insn
= bfd_get_16 (input_bfd
, hit_data
);
1313 bfd_vma lower_insn
= bfd_get_16 (input_bfd
, hit_data
+ 2);
1314 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
1315 bfd_signed_vma reloc_signed_min
= ~ reloc_signed_max
;
1317 bfd_signed_vma signed_check
;
1320 /* Need to refetch the addend and squish the two 11 bit pieces
1323 bfd_vma upper
= upper_insn
& 0x7ff;
1324 bfd_vma lower
= lower_insn
& 0x7ff;
1325 upper
= (upper
^ 0x400) - 0x400; /* sign extend */
1326 addend
= (upper
<< 12) | (lower
<< 1);
1327 signed_addend
= addend
;
1331 /* If it is not a call to thumb, assume call to arm.
1332 If it is a call relative to a section name, then it is not a
1333 function call at all, but rather a long jump. */
1334 if (sym_flags
!= STT_ARM_TFUNC
&& sym_flags
!= STT_SECTION
)
1336 if (elf32_thumb_to_arm_stub
1337 (info
, sym_name
, input_bfd
, output_bfd
, input_section
,
1338 hit_data
, sym_sec
, rel
->r_offset
, signed_addend
, value
))
1339 return bfd_reloc_ok
;
1341 return bfd_reloc_dangerous
;
1344 relocation
= value
+ signed_addend
;
1346 relocation
-= (input_section
->output_section
->vma
1347 + input_section
->output_offset
1350 if (! globals
->no_pipeline_knowledge
)
1352 Elf_Internal_Ehdr
* i_ehdrp
; /* Elf file header, internal form */
1354 i_ehdrp
= elf_elfheader (input_bfd
);
1356 /* Previous versions of this code also used to add in the pipline
1357 offset here. This is wrong because the linker is not supposed
1358 to know about such things, and one day it might change. In order
1359 to support old binaries that need the old behaviour however, so
1360 we attempt to detect which ABI was used to create the reloc. */
1361 if ( strcmp (bfd_get_target (input_bfd
), "elf32-littlearm-oabi") == 0
1362 || strcmp (bfd_get_target (input_bfd
), "elf32-bigarm-oabi") == 0
1363 || i_ehdrp
->e_ident
[EI_OSABI
] == 0)
1367 check
= relocation
>> howto
->rightshift
;
1369 /* If this is a signed value, the rightshift just dropped
1370 leading 1 bits (assuming twos complement). */
1371 if ((bfd_signed_vma
) relocation
>= 0)
1372 signed_check
= check
;
1374 signed_check
= check
| ~((bfd_vma
) -1 >> howto
->rightshift
);
1376 /* Assumes two's complement. */
1377 if (signed_check
> reloc_signed_max
|| signed_check
< reloc_signed_min
)
1380 /* Put RELOCATION back into the insn. */
1381 upper_insn
= (upper_insn
& ~(bfd_vma
) 0x7ff) | ((relocation
>> 12) & 0x7ff);
1382 lower_insn
= (lower_insn
& ~(bfd_vma
) 0x7ff) | ((relocation
>> 1) & 0x7ff);
1384 /* Put the relocated value back in the object file: */
1385 bfd_put_16 (input_bfd
, upper_insn
, hit_data
);
1386 bfd_put_16 (input_bfd
, lower_insn
, hit_data
+ 2);
1388 return (overflow
? bfd_reloc_overflow
: bfd_reloc_ok
);
1392 case R_ARM_GNU_VTINHERIT
:
1393 case R_ARM_GNU_VTENTRY
:
1394 return bfd_reloc_ok
;
1397 return bfd_reloc_notsupported
;
1399 case R_ARM_GLOB_DAT
:
1400 return bfd_reloc_notsupported
;
1402 case R_ARM_JUMP_SLOT
:
1403 return bfd_reloc_notsupported
;
1405 case R_ARM_RELATIVE
:
1406 return bfd_reloc_notsupported
;
1409 /* Relocation is relative to the start of the
1410 global offset table. */
1412 BFD_ASSERT (sgot
!= NULL
);
1414 return bfd_reloc_notsupported
;
1416 /* Note that sgot->output_offset is not involved in this
1417 calculation. We always want the start of .got. If we
1418 define _GLOBAL_OFFSET_TABLE in a different way, as is
1419 permitted by the ABI, we might have to change this
1422 value
-= sgot
->output_section
->vma
;
1423 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1424 contents
, rel
->r_offset
, value
,
1428 /* Use global offset table as symbol value. */
1430 BFD_ASSERT (sgot
!= NULL
);
1433 return bfd_reloc_notsupported
;
1435 value
= sgot
->output_section
->vma
;
1436 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1437 contents
, rel
->r_offset
, value
,
1441 /* Relocation is to the entry for this symbol in the
1442 global offset table. */
1444 return bfd_reloc_notsupported
;
1450 off
= h
->got
.offset
;
1451 BFD_ASSERT (off
!= (bfd_vma
) -1);
1453 if (!elf_hash_table (info
)->dynamic_sections_created
||
1454 (info
->shared
&& (info
->symbolic
|| h
->dynindx
== -1)
1455 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
1457 /* This is actually a static link, or it is a -Bsymbolic link
1458 and the symbol is defined locally. We must initialize this
1459 entry in the global offset table. Since the offset must
1460 always be a multiple of 4, we use the least significant bit
1461 to record whether we have initialized it already.
1463 When doing a dynamic link, we create a .rel.got relocation
1464 entry to initialize the value. This is done in the
1465 finish_dynamic_symbol routine. */
1471 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
1476 value
= sgot
->output_offset
+ off
;
1482 BFD_ASSERT (local_got_offsets
!= NULL
&&
1483 local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
1485 off
= local_got_offsets
[r_symndx
];
1487 /* The offset must always be a multiple of 4. We use the
1488 least significant bit to record whether we have already
1489 generated the necessary reloc. */
1494 bfd_put_32 (output_bfd
, value
, sgot
->contents
+ off
);
1499 Elf_Internal_Rel outrel
;
1501 srelgot
= bfd_get_section_by_name (dynobj
, ".rel.got");
1502 BFD_ASSERT (srelgot
!= NULL
);
1504 outrel
.r_offset
= (sgot
->output_section
->vma
1505 + sgot
->output_offset
1507 outrel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
1508 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1509 (((Elf32_External_Rel
*)
1511 + srelgot
->reloc_count
));
1512 ++srelgot
->reloc_count
;
1515 local_got_offsets
[r_symndx
] |= 1;
1518 value
= sgot
->output_offset
+ off
;
1521 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1522 contents
, rel
->r_offset
, value
,
1526 /* Relocation is to the entry for this symbol in the
1527 procedure linkage table. */
1529 /* Resolve a PLT32 reloc against a local symbol directly,
1530 without using the procedure linkage table. */
1532 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1533 contents
, rel
->r_offset
, value
,
1536 if (h
->plt
.offset
== (bfd_vma
) -1)
1537 /* We didn't make a PLT entry for this symbol. This
1538 happens when statically linking PIC code, or when
1539 using -Bsymbolic. */
1540 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1541 contents
, rel
->r_offset
, value
,
1544 BFD_ASSERT(splt
!= NULL
);
1546 return bfd_reloc_notsupported
;
1548 value
= (splt
->output_section
->vma
1549 + splt
->output_offset
1551 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1552 contents
, rel
->r_offset
, value
,
1556 return bfd_reloc_notsupported
;
1558 case R_ARM_AMP_VCALL9
:
1559 return bfd_reloc_notsupported
;
1561 case R_ARM_RSBREL32
:
1562 return bfd_reloc_notsupported
;
1564 case R_ARM_THM_RPC22
:
1565 return bfd_reloc_notsupported
;
1568 return bfd_reloc_notsupported
;
1571 return bfd_reloc_notsupported
;
1574 return bfd_reloc_notsupported
;
1577 return bfd_reloc_notsupported
;
1580 return bfd_reloc_notsupported
;
1585 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1587 arm_add_to_rel (abfd
, address
, howto
, increment
)
1590 reloc_howto_type
* howto
;
1591 bfd_signed_vma increment
;
1594 bfd_signed_vma addend
;
1596 contents
= bfd_get_32 (abfd
, address
);
1598 /* Get the (signed) value from the instruction. */
1599 addend
= contents
& howto
->src_mask
;
1600 if (addend
& ((howto
->src_mask
+ 1) >> 1))
1602 bfd_signed_vma mask
;
1605 mask
&= ~ howto
->src_mask
;
1609 /* Add in the increment, (which is a byte value). */
1610 addend
<<= howto
->size
;
1611 addend
+= increment
;
1613 /* Should we check for overflow here ? */
1615 /* Drop any undesired bits. */
1616 addend
>>= howto
->rightshift
;
1618 contents
= (contents
& ~ howto
->dst_mask
) | (addend
& howto
->dst_mask
);
1620 bfd_put_32 (abfd
, contents
, address
);
1622 #endif /* USE_REL */
1624 /* Relocate an ARM ELF section. */
1626 elf32_arm_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
1627 contents
, relocs
, local_syms
, local_sections
)
1629 struct bfd_link_info
* info
;
1631 asection
* input_section
;
1632 bfd_byte
* contents
;
1633 Elf_Internal_Rela
* relocs
;
1634 Elf_Internal_Sym
* local_syms
;
1635 asection
** local_sections
;
1637 Elf_Internal_Shdr
* symtab_hdr
;
1638 struct elf_link_hash_entry
** sym_hashes
;
1639 Elf_Internal_Rela
* rel
;
1640 Elf_Internal_Rela
* relend
;
1643 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1644 sym_hashes
= elf_sym_hashes (input_bfd
);
1647 relend
= relocs
+ input_section
->reloc_count
;
1648 for (; rel
< relend
; rel
++)
1651 reloc_howto_type
* howto
;
1652 unsigned long r_symndx
;
1653 Elf_Internal_Sym
* sym
;
1655 struct elf_link_hash_entry
* h
;
1657 bfd_reloc_status_type r
;
1660 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1661 r_type
= ELF32_R_TYPE (rel
->r_info
);
1663 if ( r_type
== R_ARM_GNU_VTENTRY
1664 || r_type
== R_ARM_GNU_VTINHERIT
)
1667 elf32_arm_info_to_howto (input_bfd
, & bfd_reloc
, rel
);
1668 howto
= bfd_reloc
.howto
;
1670 if (info
->relocateable
)
1672 /* This is a relocateable link. We don't have to change
1673 anything, unless the reloc is against a section symbol,
1674 in which case we have to adjust according to where the
1675 section symbol winds up in the output section. */
1676 if (r_symndx
< symtab_hdr
->sh_info
)
1678 sym
= local_syms
+ r_symndx
;
1679 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
1681 sec
= local_sections
[r_symndx
];
1683 arm_add_to_rel (input_bfd
, contents
+ rel
->r_offset
,
1684 howto
, sec
->output_offset
+ sym
->st_value
);
1686 rel
->r_addend
+= (sec
->output_offset
+ sym
->st_value
)
1687 >> howto
->rightshift
;
1695 /* This is a final link. */
1699 if (r_symndx
< symtab_hdr
->sh_info
)
1701 sym
= local_syms
+ r_symndx
;
1702 sec
= local_sections
[r_symndx
];
1703 relocation
= (sec
->output_section
->vma
1704 + sec
->output_offset
1709 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1710 while (h
->root
.type
== bfd_link_hash_indirect
1711 || h
->root
.type
== bfd_link_hash_warning
)
1712 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1713 if (h
->root
.type
== bfd_link_hash_defined
1714 || h
->root
.type
== bfd_link_hash_defweak
)
1716 int relocation_needed
= 1;
1718 sec
= h
->root
.u
.def
.section
;
1720 /* In these cases, we don't need the relocation value.
1721 We check specially because in some obscure cases
1722 sec->output_section will be NULL. */
1729 (!info
->symbolic
&& h
->dynindx
!= -1)
1730 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
1732 && ((input_section
->flags
& SEC_ALLOC
) != 0)
1734 relocation_needed
= 0;
1738 relocation_needed
= 0;
1742 if (elf_hash_table(info
)->dynamic_sections_created
1744 || (!info
->symbolic
&& h
->dynindx
!= -1)
1745 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
1748 relocation_needed
= 0;
1752 if (h
->plt
.offset
!= (bfd_vma
)-1)
1753 relocation_needed
= 0;
1757 if (sec
->output_section
== NULL
)
1759 (*_bfd_error_handler
)
1760 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1761 bfd_get_filename (input_bfd
), h
->root
.root
.string
,
1762 bfd_get_section_name (input_bfd
, input_section
));
1763 relocation_needed
= 0;
1767 if (relocation_needed
)
1768 relocation
= h
->root
.u
.def
.value
1769 + sec
->output_section
->vma
1770 + sec
->output_offset
;
1774 else if (h
->root
.type
== bfd_link_hash_undefweak
)
1776 else if (info
->shared
&& !info
->symbolic
&& !info
->no_undefined
)
1780 if (!((*info
->callbacks
->undefined_symbol
)
1781 (info
, h
->root
.root
.string
, input_bfd
,
1782 input_section
, rel
->r_offset
)))
1789 name
= h
->root
.root
.string
;
1792 name
= (bfd_elf_string_from_elf_section
1793 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1794 if (name
== NULL
|| *name
== '\0')
1795 name
= bfd_section_name (input_bfd
, sec
);
1798 r
= elf32_arm_final_link_relocate (howto
, input_bfd
, output_bfd
,
1799 input_section
, contents
, rel
,
1800 relocation
, info
, sec
, name
,
1801 (h
? ELF_ST_TYPE (h
->type
) :
1802 ELF_ST_TYPE (sym
->st_info
)), h
);
1804 if (r
!= bfd_reloc_ok
)
1806 const char * msg
= (const char *) 0;
1810 case bfd_reloc_overflow
:
1811 if (!((*info
->callbacks
->reloc_overflow
)
1812 (info
, name
, howto
->name
, (bfd_vma
) 0,
1813 input_bfd
, input_section
, rel
->r_offset
)))
1817 case bfd_reloc_undefined
:
1818 if (!((*info
->callbacks
->undefined_symbol
)
1819 (info
, name
, input_bfd
, input_section
,
1824 case bfd_reloc_outofrange
:
1825 msg
= _ ("internal error: out of range error");
1828 case bfd_reloc_notsupported
:
1829 msg
= _ ("internal error: unsupported relocation error");
1832 case bfd_reloc_dangerous
:
1833 msg
= _ ("internal error: dangerous error");
1837 msg
= _ ("internal error: unknown error");
1841 if (!((*info
->callbacks
->warning
)
1842 (info
, msg
, name
, input_bfd
, input_section
,
1853 /* Function to keep ARM specific flags in the ELF header. */
1855 elf32_arm_set_private_flags (abfd
, flags
)
1859 if (elf_flags_init (abfd
)
1860 && elf_elfheader (abfd
)->e_flags
!= flags
)
1862 if (flags
& EF_INTERWORK
)
1863 _bfd_error_handler (_ ("\
1864 Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
1865 bfd_get_filename (abfd
));
1867 _bfd_error_handler (_ ("\
1868 Warning: Clearing the interwork flag of %s due to outside request"),
1869 bfd_get_filename (abfd
));
1873 elf_elfheader (abfd
)->e_flags
= flags
;
1874 elf_flags_init (abfd
) = true;
1880 /* Copy backend specific data from one object module to another */
1882 elf32_arm_copy_private_bfd_data (ibfd
, obfd
)
1889 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1890 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1893 in_flags
= elf_elfheader (ibfd
)->e_flags
;
1894 out_flags
= elf_elfheader (obfd
)->e_flags
;
1896 if (elf_flags_init (obfd
) && in_flags
!= out_flags
)
1898 /* Cannot mix PIC and non-PIC code. */
1899 if ((in_flags
& EF_PIC
) != (out_flags
& EF_PIC
))
1902 /* Cannot mix APCS26 and APCS32 code. */
1903 if ((in_flags
& EF_APCS_26
) != (out_flags
& EF_APCS_26
))
1906 /* Cannot mix float APCS and non-float APCS code. */
1907 if ((in_flags
& EF_APCS_FLOAT
) != (out_flags
& EF_APCS_FLOAT
))
1910 /* If the src and dest have different interworking flags
1911 then turn off the interworking bit. */
1912 if ((in_flags
& EF_INTERWORK
) != (out_flags
& EF_INTERWORK
))
1914 if (out_flags
& EF_INTERWORK
)
1915 _bfd_error_handler (_ ("\
1916 Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
1917 bfd_get_filename (obfd
), bfd_get_filename (ibfd
));
1919 in_flags
&= ~EF_INTERWORK
;
1923 elf_elfheader (obfd
)->e_flags
= in_flags
;
1924 elf_flags_init (obfd
) = true;
1929 /* Merge backend specific data from an object file to the output
1930 object file when linking. */
1932 elf32_arm_merge_private_bfd_data (ibfd
, obfd
)
1939 if ( bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1940 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1943 /* Check if we have the same endianess */
1944 if ( ibfd
->xvec
->byteorder
!= obfd
->xvec
->byteorder
1945 && obfd
->xvec
->byteorder
!= BFD_ENDIAN_UNKNOWN
1946 && ibfd
->xvec
->byteorder
!= BFD_ENDIAN_UNKNOWN
)
1948 (*_bfd_error_handler
)
1949 (_("%s: compiled for a %s endian system and target is %s endian"),
1950 bfd_get_filename (ibfd
),
1951 bfd_big_endian (ibfd
) ? "big" : "little",
1952 bfd_big_endian (obfd
) ? "big" : "little");
1954 bfd_set_error (bfd_error_wrong_format
);
1958 /* The input BFD must have had its flags initialised. */
1959 /* The following seems bogus to me -- The flags are initialized in
1960 the assembler but I don't think an elf_flags_init field is
1961 written into the object */
1962 /* BFD_ASSERT (elf_flags_init (ibfd)); */
1964 in_flags
= elf_elfheader (ibfd
)->e_flags
;
1965 out_flags
= elf_elfheader (obfd
)->e_flags
;
1967 if (!elf_flags_init (obfd
))
1969 /* If the input is the default architecture then do not
1970 bother setting the flags for the output architecture,
1971 instead allow future merges to do this. If no future
1972 merges ever set these flags then they will retain their
1973 unitialised values, which surprise surprise, correspond
1974 to the default values. */
1975 if (bfd_get_arch_info (ibfd
)->the_default
)
1978 elf_flags_init (obfd
) = true;
1979 elf_elfheader (obfd
)->e_flags
= in_flags
;
1981 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
1982 && bfd_get_arch_info (obfd
)->the_default
)
1983 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
1988 /* Check flag compatibility. */
1989 if (in_flags
== out_flags
)
1992 /* Complain about various flag mismatches. */
1994 if ((in_flags
& EF_APCS_26
) != (out_flags
& EF_APCS_26
))
1995 _bfd_error_handler (_ ("\
1996 Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
1997 bfd_get_filename (ibfd
),
1998 in_flags
& EF_APCS_26
? 26 : 32,
1999 bfd_get_filename (obfd
),
2000 out_flags
& EF_APCS_26
? 26 : 32);
2002 if ((in_flags
& EF_APCS_FLOAT
) != (out_flags
& EF_APCS_FLOAT
))
2003 _bfd_error_handler (_ ("\
2004 Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
2005 bfd_get_filename (ibfd
),
2006 in_flags
& EF_APCS_FLOAT
? _ ("float") : _ ("integer"),
2007 bfd_get_filename (obfd
),
2008 out_flags
& EF_APCS_26
? _ ("float") : _ ("integer"));
2010 if ((in_flags
& EF_PIC
) != (out_flags
& EF_PIC
))
2011 _bfd_error_handler (_ ("\
2012 Error: %s is compiled as position %s code, whereas %s is not"),
2013 bfd_get_filename (ibfd
),
2014 in_flags
& EF_PIC
? _ ("independent") : _ ("dependent"),
2015 bfd_get_filename (obfd
));
2017 /* Interworking mismatch is only a warning. */
2018 if ((in_flags
& EF_INTERWORK
) != (out_flags
& EF_INTERWORK
))
2020 _bfd_error_handler (_ ("\
2021 Warning: %s %s interworking, whereas %s %s"),
2022 bfd_get_filename (ibfd
),
2023 in_flags
& EF_INTERWORK
? _ ("supports") : _ ("does not support"),
2024 bfd_get_filename (obfd
),
2025 out_flags
& EF_INTERWORK
? _ ("does not") : _ ("does"));
2032 /* Display the flags field */
2034 elf32_arm_print_private_bfd_data (abfd
, ptr
)
2038 FILE *file
= (FILE *) ptr
;
2040 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
2042 /* Print normal ELF private data. */
2043 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
2045 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
2047 /* xgettext:c-format */
2048 fprintf (file
, _ ("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
2050 if (elf_elfheader (abfd
)->e_flags
& EF_INTERWORK
)
2051 fprintf (file
, _ (" [interworking enabled]"));
2053 fprintf (file
, _ (" [interworking not enabled]"));
2055 if (elf_elfheader (abfd
)->e_flags
& EF_APCS_26
)
2056 fprintf (file
, _ (" [APCS-26]"));
2058 fprintf (file
, _ (" [APCS-32]"));
2060 if (elf_elfheader (abfd
)->e_flags
& EF_APCS_FLOAT
)
2061 fprintf (file
, _ (" [floats passed in float registers]"));
2063 fprintf (file
, _ (" [floats passed in integer registers]"));
2065 if (elf_elfheader (abfd
)->e_flags
& EF_PIC
)
2066 fprintf (file
, _ (" [position independent]"));
2068 fprintf (file
, _ (" [absolute position]"));
2076 elf32_arm_get_symbol_type (elf_sym
, type
)
2077 Elf_Internal_Sym
* elf_sym
;
2080 if (ELF_ST_TYPE (elf_sym
->st_info
) == STT_ARM_TFUNC
)
2081 return ELF_ST_TYPE (elf_sym
->st_info
);
2087 elf32_arm_gc_mark_hook (abfd
, info
, rel
, h
, sym
)
2089 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2090 Elf_Internal_Rela
*rel
;
2091 struct elf_link_hash_entry
*h
;
2092 Elf_Internal_Sym
*sym
;
2096 switch (ELF32_R_TYPE (rel
->r_info
))
2098 case R_ARM_GNU_VTINHERIT
:
2099 case R_ARM_GNU_VTENTRY
:
2103 switch (h
->root
.type
)
2105 case bfd_link_hash_defined
:
2106 case bfd_link_hash_defweak
:
2107 return h
->root
.u
.def
.section
;
2109 case bfd_link_hash_common
:
2110 return h
->root
.u
.c
.p
->section
;
2119 if (!(elf_bad_symtab (abfd
)
2120 && ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
2121 && ! ((sym
->st_shndx
<= 0 || sym
->st_shndx
>= SHN_LORESERVE
)
2122 && sym
->st_shndx
!= SHN_COMMON
))
2124 return bfd_section_from_elf_index (abfd
, sym
->st_shndx
);
2130 /* Update the got entry reference counts for the section being removed. */
2133 elf32_arm_gc_sweep_hook (abfd
, info
, sec
, relocs
)
2134 bfd
*abfd ATTRIBUTE_UNUSED
;
2135 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2136 asection
*sec ATTRIBUTE_UNUSED
;
2137 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
;
2139 /* We don't support garbage collection of GOT and PLT relocs yet. */
2143 /* Look through the relocs for a section during the first phase. */
2146 elf32_arm_check_relocs (abfd
, info
, sec
, relocs
)
2148 struct bfd_link_info
* info
;
2150 const Elf_Internal_Rela
* relocs
;
2152 Elf_Internal_Shdr
* symtab_hdr
;
2153 struct elf_link_hash_entry
** sym_hashes
;
2154 struct elf_link_hash_entry
** sym_hashes_end
;
2155 const Elf_Internal_Rela
* rel
;
2156 const Elf_Internal_Rela
* rel_end
;
2158 asection
* sgot
, *srelgot
, *sreloc
;
2159 bfd_vma
* local_got_offsets
;
2161 if (info
->relocateable
)
2164 sgot
= srelgot
= sreloc
= NULL
;
2166 dynobj
= elf_hash_table (info
)->dynobj
;
2167 local_got_offsets
= elf_local_got_offsets (abfd
);
2169 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2170 sym_hashes
= elf_sym_hashes (abfd
);
2171 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
2172 if (!elf_bad_symtab (abfd
))
2173 sym_hashes_end
-= symtab_hdr
->sh_info
;
2175 rel_end
= relocs
+ sec
->reloc_count
;
2176 for (rel
= relocs
; rel
< rel_end
; rel
++)
2178 struct elf_link_hash_entry
*h
;
2179 unsigned long r_symndx
;
2181 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2182 if (r_symndx
< symtab_hdr
->sh_info
)
2185 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2187 /* Some relocs require a global offset table. */
2190 switch (ELF32_R_TYPE (rel
->r_info
))
2195 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2196 if (! _bfd_elf_create_got_section (dynobj
, info
))
2205 switch (ELF32_R_TYPE (rel
->r_info
))
2208 /* This symbol requires a global offset table entry. */
2211 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2212 BFD_ASSERT (sgot
!= NULL
);
2215 /* Get the got relocation section if necessary. */
2217 && (h
!= NULL
|| info
->shared
))
2219 srelgot
= bfd_get_section_by_name (dynobj
, ".rel.got");
2221 /* If no got relocation section, make one and initialize. */
2222 if (srelgot
== NULL
)
2224 srelgot
= bfd_make_section (dynobj
, ".rel.got");
2226 || ! bfd_set_section_flags (dynobj
, srelgot
,
2231 | SEC_LINKER_CREATED
2233 || ! bfd_set_section_alignment (dynobj
, srelgot
, 2))
2240 if (h
->got
.offset
!= (bfd_vma
) -1)
2241 /* We have already allocated space in the .got. */
2244 h
->got
.offset
= sgot
->_raw_size
;
2246 /* Make sure this symbol is output as a dynamic symbol. */
2247 if (h
->dynindx
== -1)
2248 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2251 srelgot
->_raw_size
+= sizeof (Elf32_External_Rel
);
2255 /* This is a global offset table entry for a local
2257 if (local_got_offsets
== NULL
)
2260 register unsigned int i
;
2262 size
= symtab_hdr
->sh_info
* sizeof (bfd_vma
);
2263 local_got_offsets
= (bfd_vma
*) bfd_alloc (abfd
, size
);
2264 if (local_got_offsets
== NULL
)
2266 elf_local_got_offsets (abfd
) = local_got_offsets
;
2267 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
2268 local_got_offsets
[i
] = (bfd_vma
) -1;
2271 if (local_got_offsets
[r_symndx
] != (bfd_vma
) -1)
2272 /* We have already allocated space in the .got. */
2275 local_got_offsets
[r_symndx
] = sgot
->_raw_size
;
2278 /* If we are generating a shared object, we need to
2279 output a R_ARM_RELATIVE reloc so that the dynamic
2280 linker can adjust this GOT entry. */
2281 srelgot
->_raw_size
+= sizeof (Elf32_External_Rel
);
2284 sgot
->_raw_size
+= 4;
2288 /* This symbol requires a procedure linkage table entry. We
2289 actually build the entry in adjust_dynamic_symbol,
2290 because this might be a case of linking PIC code which is
2291 never referenced by a dynamic object, in which case we
2292 don't need to generate a procedure linkage table entry
2295 /* If this is a local symbol, we resolve it directly without
2296 creating a procedure linkage table entry. */
2300 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2306 /* If we are creating a shared library, and this is a reloc
2307 against a global symbol, or a non PC relative reloc
2308 against a local symbol, then we need to copy the reloc
2309 into the shared library. However, if we are linking with
2310 -Bsymbolic, we do not need to copy a reloc against a
2311 global symbol which is defined in an object we are
2312 including in the link (i.e., DEF_REGULAR is set). At
2313 this point we have not seen all the input files, so it is
2314 possible that DEF_REGULAR is not set now but will be set
2315 later (it is never cleared). We account for that
2316 possibility below by storing information in the
2317 pcrel_relocs_copied field of the hash table entry. */
2319 && (ELF32_R_TYPE (rel
->r_info
) != R_ARM_PC24
2321 && (! info
->symbolic
2322 || (h
->elf_link_hash_flags
2323 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
2325 /* When creating a shared object, we must copy these
2326 reloc types into the output file. We create a reloc
2327 section in dynobj and make room for this reloc. */
2332 name
= (bfd_elf_string_from_elf_section
2334 elf_elfheader (abfd
)->e_shstrndx
,
2335 elf_section_data (sec
)->rel_hdr
.sh_name
));
2339 BFD_ASSERT (strncmp (name
, ".rel", 4) == 0
2340 && strcmp (bfd_get_section_name (abfd
, sec
),
2343 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2348 sreloc
= bfd_make_section (dynobj
, name
);
2349 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
2350 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2351 if ((sec
->flags
& SEC_ALLOC
) != 0)
2352 flags
|= SEC_ALLOC
| SEC_LOAD
;
2354 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
2355 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
2360 sreloc
->_raw_size
+= sizeof (Elf32_External_Rel
);
2361 /* If we are linking with -Bsymbolic, and this is a
2362 global symbol, we count the number of PC relative
2363 relocations we have entered for this symbol, so that
2364 we can discard them again if the symbol is later
2365 defined by a regular object. Note that this function
2366 is only called if we are using an elf_i386 linker
2367 hash table, which means that h is really a pointer to
2368 an elf_i386_link_hash_entry. */
2369 if (h
!= NULL
&& info
->symbolic
2370 && ELF32_R_TYPE (rel
->r_info
) == R_ARM_PC24
)
2372 struct elf32_arm_link_hash_entry
* eh
;
2373 struct elf32_arm_pcrel_relocs_copied
* p
;
2375 eh
= (struct elf32_arm_link_hash_entry
*) h
;
2377 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
2378 if (p
->section
== sreloc
)
2383 p
= ((struct elf32_arm_pcrel_relocs_copied
*)
2384 bfd_alloc (dynobj
, sizeof * p
));
2388 p
->next
= eh
->pcrel_relocs_copied
;
2389 eh
->pcrel_relocs_copied
= p
;
2390 p
->section
= sreloc
;
2399 /* This relocation describes the C++ object vtable hierarchy.
2400 Reconstruct it for later use during GC. */
2401 case R_ARM_GNU_VTINHERIT
:
2402 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2406 /* This relocation describes which C++ vtable entries are actually
2407 used. Record for later use during GC. */
2408 case R_ARM_GNU_VTENTRY
:
2409 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2419 /* Find the nearest line to a particular section and offset, for error
2420 reporting. This code is a duplicate of the code in elf.c, except
2421 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
2424 elf32_arm_find_nearest_line
2425 (abfd
, section
, symbols
, offset
, filename_ptr
, functionname_ptr
, line_ptr
)
2430 CONST
char ** filename_ptr
;
2431 CONST
char ** functionname_ptr
;
2432 unsigned int * line_ptr
;
2435 const char * filename
;
2440 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
2441 filename_ptr
, functionname_ptr
,
2445 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
2446 &found
, filename_ptr
,
2447 functionname_ptr
, line_ptr
,
2448 &elf_tdata (abfd
)->line_info
))
2454 if (symbols
== NULL
)
2461 for (p
= symbols
; *p
!= NULL
; p
++)
2465 q
= (elf_symbol_type
*) *p
;
2467 if (bfd_get_section (&q
->symbol
) != section
)
2470 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
2475 filename
= bfd_asymbol_name (&q
->symbol
);
2480 if (q
->symbol
.section
== section
2481 && q
->symbol
.value
>= low_func
2482 && q
->symbol
.value
<= offset
)
2484 func
= (asymbol
*) q
;
2485 low_func
= q
->symbol
.value
;
2494 *filename_ptr
= filename
;
2495 *functionname_ptr
= bfd_asymbol_name (func
);
2501 /* Adjust a symbol defined by a dynamic object and referenced by a
2502 regular object. The current definition is in some section of the
2503 dynamic object, but we're not including those sections. We have to
2504 change the definition to something the rest of the link can
2508 elf32_arm_adjust_dynamic_symbol (info
, h
)
2509 struct bfd_link_info
* info
;
2510 struct elf_link_hash_entry
* h
;
2514 unsigned int power_of_two
;
2516 dynobj
= elf_hash_table (info
)->dynobj
;
2518 /* Make sure we know what is going on here. */
2519 BFD_ASSERT (dynobj
!= NULL
2520 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
2521 || h
->weakdef
!= NULL
2522 || ((h
->elf_link_hash_flags
2523 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2524 && (h
->elf_link_hash_flags
2525 & ELF_LINK_HASH_REF_REGULAR
) != 0
2526 && (h
->elf_link_hash_flags
2527 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
2529 /* If this is a function, put it in the procedure linkage table. We
2530 will fill in the contents of the procedure linkage table later,
2531 when we know the address of the .got section. */
2532 if (h
->type
== STT_FUNC
2533 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
2536 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
2537 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0)
2539 /* This case can occur if we saw a PLT32 reloc in an input
2540 file, but the symbol was never referred to by a dynamic
2541 object. In such a case, we don't actually need to build
2542 a procedure linkage table, and we can just do a PC32
2544 BFD_ASSERT ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0);
2548 /* Make sure this symbol is output as a dynamic symbol. */
2549 if (h
->dynindx
== -1)
2551 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2555 s
= bfd_get_section_by_name (dynobj
, ".plt");
2556 BFD_ASSERT (s
!= NULL
);
2558 /* If this is the first .plt entry, make room for the special
2560 if (s
->_raw_size
== 0)
2561 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2563 /* If this symbol is not defined in a regular file, and we are
2564 not generating a shared library, then set the symbol to this
2565 location in the .plt. This is required to make function
2566 pointers compare as equal between the normal executable and
2567 the shared library. */
2569 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2571 h
->root
.u
.def
.section
= s
;
2572 h
->root
.u
.def
.value
= s
->_raw_size
;
2575 h
->plt
.offset
= s
->_raw_size
;
2577 /* Make room for this entry. */
2578 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2580 /* We also need to make an entry in the .got.plt section, which
2581 will be placed in the .got section by the linker script. */
2583 s
= bfd_get_section_by_name (dynobj
, ".got.plt");
2584 BFD_ASSERT (s
!= NULL
);
2587 /* We also need to make an entry in the .rel.plt section. */
2589 s
= bfd_get_section_by_name (dynobj
, ".rel.plt");
2590 BFD_ASSERT (s
!= NULL
);
2591 s
->_raw_size
+= sizeof (Elf32_External_Rel
);
2596 /* If this is a weak symbol, and there is a real definition, the
2597 processor independent code will have arranged for us to see the
2598 real definition first, and we can just use the same value. */
2599 if (h
->weakdef
!= NULL
)
2601 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
2602 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
2603 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
2604 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
2608 /* This is a reference to a symbol defined by a dynamic object which
2609 is not a function. */
2611 /* If we are creating a shared library, we must presume that the
2612 only references to the symbol are via the global offset table.
2613 For such cases we need not do anything here; the relocations will
2614 be handled correctly by relocate_section. */
2618 /* We must allocate the symbol in our .dynbss section, which will
2619 become part of the .bss section of the executable. There will be
2620 an entry for this symbol in the .dynsym section. The dynamic
2621 object will contain position independent code, so all references
2622 from the dynamic object to this symbol will go through the global
2623 offset table. The dynamic linker will use the .dynsym entry to
2624 determine the address it must put in the global offset table, so
2625 both the dynamic object and the regular object will refer to the
2626 same memory location for the variable. */
2628 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
2629 BFD_ASSERT (s
!= NULL
);
2631 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2632 copy the initial value out of the dynamic object and into the
2633 runtime process image. We need to remember the offset into the
2634 .rel.bss section we are going to use. */
2635 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2639 srel
= bfd_get_section_by_name (dynobj
, ".rel.bss");
2640 BFD_ASSERT (srel
!= NULL
);
2641 srel
->_raw_size
+= sizeof (Elf32_External_Rel
);
2642 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
2645 /* We need to figure out the alignment required for this symbol. I
2646 have no idea how ELF linkers handle this. */
2647 power_of_two
= bfd_log2 (h
->size
);
2648 if (power_of_two
> 3)
2651 /* Apply the required alignment. */
2652 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
2653 (bfd_size_type
) (1 << power_of_two
));
2654 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
2656 if (! bfd_set_section_alignment (dynobj
, s
, power_of_two
))
2660 /* Define the symbol as being at this point in the section. */
2661 h
->root
.u
.def
.section
= s
;
2662 h
->root
.u
.def
.value
= s
->_raw_size
;
2664 /* Increment the section size to make room for the symbol. */
2665 s
->_raw_size
+= h
->size
;
2670 /* Set the sizes of the dynamic sections. */
2673 elf32_arm_size_dynamic_sections (output_bfd
, info
)
2675 struct bfd_link_info
* info
;
2683 dynobj
= elf_hash_table (info
)->dynobj
;
2684 BFD_ASSERT (dynobj
!= NULL
);
2686 if (elf_hash_table (info
)->dynamic_sections_created
)
2688 /* Set the contents of the .interp section to the interpreter. */
2691 s
= bfd_get_section_by_name (dynobj
, ".interp");
2692 BFD_ASSERT (s
!= NULL
);
2693 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2694 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2699 /* We may have created entries in the .rel.got section.
2700 However, if we are not creating the dynamic sections, we will
2701 not actually use these entries. Reset the size of .rel.got,
2702 which will cause it to get stripped from the output file
2704 s
= bfd_get_section_by_name (dynobj
, ".rel.got");
2709 /* If this is a -Bsymbolic shared link, then we need to discard all
2710 PC relative relocs against symbols defined in a regular object.
2711 We allocated space for them in the check_relocs routine, but we
2712 will not fill them in in the relocate_section routine. */
2713 if (info
->shared
&& info
->symbolic
)
2714 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info
),
2715 elf32_arm_discard_copies
,
2718 /* The check_relocs and adjust_dynamic_symbol entry points have
2719 determined the sizes of the various dynamic sections. Allocate
2724 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2729 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2732 /* It's OK to base decisions on the section name, because none
2733 of the dynobj section names depend upon the input files. */
2734 name
= bfd_get_section_name (dynobj
, s
);
2738 if (strcmp (name
, ".plt") == 0)
2740 if (s
->_raw_size
== 0)
2742 /* Strip this section if we don't need it; see the
2748 /* Remember whether there is a PLT. */
2752 else if (strncmp (name
, ".rel", 4) == 0)
2754 if (s
->_raw_size
== 0)
2756 /* If we don't need this section, strip it from the
2757 output file. This is mostly to handle .rel.bss and
2758 .rel.plt. We must create both sections in
2759 create_dynamic_sections, because they must be created
2760 before the linker maps input sections to output
2761 sections. The linker does that before
2762 adjust_dynamic_symbol is called, and it is that
2763 function which decides whether anything needs to go
2764 into these sections. */
2771 /* Remember whether there are any reloc sections other
2773 if (strcmp (name
, ".rel.plt") != 0)
2775 const char *outname
;
2779 /* If this relocation section applies to a read only
2780 section, then we probably need a DT_TEXTREL
2781 entry. The entries in the .rel.plt section
2782 really apply to the .got section, which we
2783 created ourselves and so know is not readonly. */
2784 outname
= bfd_get_section_name (output_bfd
,
2786 target
= bfd_get_section_by_name (output_bfd
, outname
+ 4);
2788 && (target
->flags
& SEC_READONLY
) != 0
2789 && (target
->flags
& SEC_ALLOC
) != 0)
2793 /* We use the reloc_count field as a counter if we need
2794 to copy relocs into the output file. */
2798 else if (strncmp (name
, ".got", 4) != 0)
2800 /* It's not one of our sections, so don't allocate space. */
2808 for (spp
= &s
->output_section
->owner
->sections
;
2809 *spp
!= s
->output_section
;
2810 spp
= &(*spp
)->next
)
2812 *spp
= s
->output_section
->next
;
2813 --s
->output_section
->owner
->section_count
;
2818 /* Allocate memory for the section contents. */
2819 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2820 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2824 if (elf_hash_table (info
)->dynamic_sections_created
)
2826 /* Add some entries to the .dynamic section. We fill in the
2827 values later, in elf32_arm_finish_dynamic_sections, but we
2828 must add the entries now so that we get the correct size for
2829 the .dynamic section. The DT_DEBUG entry is filled in by the
2830 dynamic linker and used by the debugger. */
2833 if (! bfd_elf32_add_dynamic_entry (info
, DT_DEBUG
, 0))
2839 if (! bfd_elf32_add_dynamic_entry (info
, DT_PLTGOT
, 0)
2840 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
2841 || ! bfd_elf32_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
2842 || ! bfd_elf32_add_dynamic_entry (info
, DT_JMPREL
, 0))
2848 if (! bfd_elf32_add_dynamic_entry (info
, DT_REL
, 0)
2849 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELSZ
, 0)
2850 || ! bfd_elf32_add_dynamic_entry (info
, DT_RELENT
,
2851 sizeof (Elf32_External_Rel
)))
2857 if (! bfd_elf32_add_dynamic_entry (info
, DT_TEXTREL
, 0))
2865 /* This function is called via elf32_arm_link_hash_traverse if we are
2866 creating a shared object with -Bsymbolic. It discards the space
2867 allocated to copy PC relative relocs against symbols which are
2868 defined in regular objects. We allocated space for them in the
2869 check_relocs routine, but we won't fill them in in the
2870 relocate_section routine. */
2873 elf32_arm_discard_copies (h
, ignore
)
2874 struct elf32_arm_link_hash_entry
* h
;
2875 PTR ignore ATTRIBUTE_UNUSED
;
2877 struct elf32_arm_pcrel_relocs_copied
* s
;
2879 /* We only discard relocs for symbols defined in a regular object. */
2880 if ((h
->root
.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2883 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
2884 s
->section
->_raw_size
-= s
->count
* sizeof (Elf32_External_Rel
);
2889 /* Finish up dynamic symbol handling. We set the contents of various
2890 dynamic sections here. */
2893 elf32_arm_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2895 struct bfd_link_info
* info
;
2896 struct elf_link_hash_entry
* h
;
2897 Elf_Internal_Sym
* sym
;
2901 dynobj
= elf_hash_table (info
)->dynobj
;
2903 if (h
->plt
.offset
!= (bfd_vma
) -1)
2910 Elf_Internal_Rel rel
;
2912 /* This symbol has an entry in the procedure linkage table. Set
2915 BFD_ASSERT (h
->dynindx
!= -1);
2917 splt
= bfd_get_section_by_name (dynobj
, ".plt");
2918 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
2919 srel
= bfd_get_section_by_name (dynobj
, ".rel.plt");
2920 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srel
!= NULL
);
2922 /* Get the index in the procedure linkage table which
2923 corresponds to this symbol. This is the index of this symbol
2924 in all the symbols for which we are making plt entries. The
2925 first entry in the procedure linkage table is reserved. */
2926 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2928 /* Get the offset into the .got table of the entry that
2929 corresponds to this function. Each .got entry is 4 bytes.
2930 The first three are reserved. */
2931 got_offset
= (plt_index
+ 3) * 4;
2933 /* Fill in the entry in the procedure linkage table. */
2934 memcpy (splt
->contents
+ h
->plt
.offset
,
2935 elf32_arm_plt_entry
,
2937 bfd_put_32 (output_bfd
,
2938 (sgot
->output_section
->vma
2939 + sgot
->output_offset
2941 - splt
->output_section
->vma
2942 - splt
->output_offset
2943 - h
->plt
.offset
- 12),
2944 splt
->contents
+ h
->plt
.offset
+ 12);
2946 /* Fill in the entry in the global offset table. */
2947 bfd_put_32 (output_bfd
,
2948 (splt
->output_section
->vma
2949 + splt
->output_offset
),
2950 sgot
->contents
+ got_offset
);
2952 /* Fill in the entry in the .rel.plt section. */
2953 rel
.r_offset
= (sgot
->output_section
->vma
2954 + sgot
->output_offset
2956 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_JUMP_SLOT
);
2957 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
2958 ((Elf32_External_Rel
*) srel
->contents
2961 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2963 /* Mark the symbol as undefined, rather than as defined in
2964 the .plt section. Leave the value alone. */
2965 sym
->st_shndx
= SHN_UNDEF
;
2969 if (h
->got
.offset
!= (bfd_vma
) -1)
2973 Elf_Internal_Rel rel
;
2975 /* This symbol has an entry in the global offset table. Set it
2978 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2979 srel
= bfd_get_section_by_name (dynobj
, ".rel.got");
2980 BFD_ASSERT (sgot
!= NULL
&& srel
!= NULL
);
2982 rel
.r_offset
= (sgot
->output_section
->vma
2983 + sgot
->output_offset
2984 + (h
->got
.offset
&~ 1));
2986 /* If this is a -Bsymbolic link, and the symbol is defined
2987 locally, we just want to emit a RELATIVE reloc. The entry in
2988 the global offset table will already have been initialized in
2989 the relocate_section function. */
2991 && (info
->symbolic
|| h
->dynindx
== -1)
2992 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
2993 rel
.r_info
= ELF32_R_INFO (0, R_ARM_RELATIVE
);
2996 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
2997 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_GLOB_DAT
);
3000 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3001 ((Elf32_External_Rel
*) srel
->contents
3002 + srel
->reloc_count
));
3003 ++srel
->reloc_count
;
3006 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
3009 Elf_Internal_Rel rel
;
3011 /* This symbol needs a copy reloc. Set it up. */
3013 BFD_ASSERT (h
->dynindx
!= -1
3014 && (h
->root
.type
== bfd_link_hash_defined
3015 || h
->root
.type
== bfd_link_hash_defweak
));
3017 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
3019 BFD_ASSERT (s
!= NULL
);
3021 rel
.r_offset
= (h
->root
.u
.def
.value
3022 + h
->root
.u
.def
.section
->output_section
->vma
3023 + h
->root
.u
.def
.section
->output_offset
);
3024 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_ARM_COPY
);
3025 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3026 ((Elf32_External_Rel
*) s
->contents
3031 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3032 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3033 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
3034 sym
->st_shndx
= SHN_ABS
;
3039 /* Finish up the dynamic sections. */
3042 elf32_arm_finish_dynamic_sections (output_bfd
, info
)
3044 struct bfd_link_info
* info
;
3050 dynobj
= elf_hash_table (info
)->dynobj
;
3052 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
3053 BFD_ASSERT (sgot
!= NULL
);
3054 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3056 if (elf_hash_table (info
)->dynamic_sections_created
)
3059 Elf32_External_Dyn
*dyncon
, *dynconend
;
3061 splt
= bfd_get_section_by_name (dynobj
, ".plt");
3062 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3064 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3065 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
3066 for (; dyncon
< dynconend
; dyncon
++)
3068 Elf_Internal_Dyn dyn
;
3072 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3085 s
= bfd_get_section_by_name (output_bfd
, name
);
3086 BFD_ASSERT (s
!= NULL
);
3087 dyn
.d_un
.d_ptr
= s
->vma
;
3088 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3092 s
= bfd_get_section_by_name (output_bfd
, ".rel.plt");
3093 BFD_ASSERT (s
!= NULL
);
3094 if (s
->_cooked_size
!= 0)
3095 dyn
.d_un
.d_val
= s
->_cooked_size
;
3097 dyn
.d_un
.d_val
= s
->_raw_size
;
3098 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3102 /* My reading of the SVR4 ABI indicates that the
3103 procedure linkage table relocs (DT_JMPREL) should be
3104 included in the overall relocs (DT_REL). This is
3105 what Solaris does. However, UnixWare can not handle
3106 that case. Therefore, we override the DT_RELSZ entry
3107 here to make it not include the JMPREL relocs. Since
3108 the linker script arranges for .rel.plt to follow all
3109 other relocation sections, we don't have to worry
3110 about changing the DT_REL entry. */
3111 s
= bfd_get_section_by_name (output_bfd
, ".rel.plt");
3114 if (s
->_cooked_size
!= 0)
3115 dyn
.d_un
.d_val
-= s
->_cooked_size
;
3117 dyn
.d_un
.d_val
-= s
->_raw_size
;
3119 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3124 /* Fill in the first entry in the procedure linkage table. */
3125 if (splt
->_raw_size
> 0)
3126 memcpy (splt
->contents
, elf32_arm_plt0_entry
, PLT_ENTRY_SIZE
);
3128 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3129 really seem like the right value. */
3130 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3133 /* Fill in the first three entries in the global offset table. */
3134 if (sgot
->_raw_size
> 0)
3137 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3139 bfd_put_32 (output_bfd
,
3140 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3142 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
3143 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
3146 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3152 elf32_arm_post_process_headers (abfd
, link_info
)
3154 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
;
3156 Elf_Internal_Ehdr
* i_ehdrp
; /* Elf file header, internal form */
3158 i_ehdrp
= elf_elfheader (abfd
);
3160 i_ehdrp
->e_ident
[EI_OSABI
] = ARM_ELF_OS_ABI_VERSION
;
3161 i_ehdrp
->e_ident
[EI_ABIVERSION
] = ARM_ELF_ABI_VERSION
;
3165 #define ELF_ARCH bfd_arch_arm
3166 #define ELF_MACHINE_CODE EM_ARM
3167 #define ELF_MAXPAGESIZE 0x8000
3170 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3171 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
3172 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3173 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3174 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
3175 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
3176 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3178 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3179 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3180 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3181 #define elf_backend_check_relocs elf32_arm_check_relocs
3182 #define elf_backend_relocate_section elf32_arm_relocate_section
3183 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3184 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3185 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3186 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3187 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
3188 #define elf_backend_post_process_headers elf32_arm_post_process_headers
3190 #define elf_backend_can_gc_sections 1
3191 #define elf_backend_plt_readonly 1
3192 #define elf_backend_want_got_plt 1
3193 #define elf_backend_want_plt_sym 0
3195 #define elf_backend_got_header_size 12
3196 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
3198 #include "elf32-target.h"