1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
31 haven't bothered yet. */
33 /* For sparc64-cross-sparc32. */
41 #include "libiberty.h"
43 static INLINE
struct elf_segment_map
*make_mapping
44 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, bfd_boolean
));
45 static bfd_boolean map_sections_to_segments
47 static int elf_sort_sections
48 PARAMS ((const PTR
, const PTR
));
49 static bfd_boolean assign_file_positions_for_segments
51 static bfd_boolean assign_file_positions_except_relocs
53 static bfd_boolean prep_headers
55 static bfd_boolean swap_out_syms
56 PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
57 static bfd_boolean copy_private_bfd_data
58 PARAMS ((bfd
*, bfd
*));
60 PARAMS ((bfd
*, file_ptr
, bfd_size_type
));
61 static const char *group_signature
62 PARAMS ((bfd
*, Elf_Internal_Shdr
*));
63 static bfd_boolean setup_group
64 PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*));
65 static void merge_sections_remove_hook
66 PARAMS ((bfd
*, asection
*));
67 static void elf_fake_sections
68 PARAMS ((bfd
*, asection
*, PTR
));
69 static bfd_boolean assign_section_numbers
71 static INLINE
int sym_is_global
72 PARAMS ((bfd
*, asymbol
*));
73 static bfd_boolean elf_map_symbols
75 static bfd_size_type get_program_header_size
77 static bfd_boolean elfcore_read_notes
78 PARAMS ((bfd
*, file_ptr
, bfd_size_type
));
79 static bfd_boolean elf_find_function
80 PARAMS ((bfd
*, asection
*, asymbol
**, bfd_vma
, const char **,
82 static int elfcore_make_pid
84 static bfd_boolean elfcore_maybe_make_sect
85 PARAMS ((bfd
*, char *, asection
*));
86 static bfd_boolean elfcore_make_note_pseudosection
87 PARAMS ((bfd
*, char *, Elf_Internal_Note
*));
88 static bfd_boolean elfcore_grok_prfpreg
89 PARAMS ((bfd
*, Elf_Internal_Note
*));
90 static bfd_boolean elfcore_grok_prxfpreg
91 PARAMS ((bfd
*, Elf_Internal_Note
*));
92 static bfd_boolean elfcore_grok_note
93 PARAMS ((bfd
*, Elf_Internal_Note
*));
94 static bfd_boolean elfcore_netbsd_get_lwpid
95 PARAMS ((Elf_Internal_Note
*, int *));
96 static bfd_boolean elfcore_grok_netbsd_procinfo
97 PARAMS ((bfd
*, Elf_Internal_Note
*));
98 static bfd_boolean elfcore_grok_netbsd_note
99 PARAMS ((bfd
*, Elf_Internal_Note
*));
100 static bfd_boolean elfcore_grok_nto_gregs
101 PARAMS ((bfd
*, Elf_Internal_Note
*, pid_t
));
102 static bfd_boolean elfcore_grok_nto_status
103 PARAMS ((bfd
*, Elf_Internal_Note
*, pid_t
*));
104 static bfd_boolean elfcore_grok_nto_note
105 PARAMS ((bfd
*, Elf_Internal_Note
*));
107 /* Swap version information in and out. The version information is
108 currently size independent. If that ever changes, this code will
109 need to move into elfcode.h. */
111 /* Swap in a Verdef structure. */
114 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
116 const Elf_External_Verdef
*src
;
117 Elf_Internal_Verdef
*dst
;
119 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
120 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
121 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
122 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
123 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
124 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
125 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
128 /* Swap out a Verdef structure. */
131 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
133 const Elf_Internal_Verdef
*src
;
134 Elf_External_Verdef
*dst
;
136 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
137 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
138 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
139 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
140 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
141 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
142 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
145 /* Swap in a Verdaux structure. */
148 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
150 const Elf_External_Verdaux
*src
;
151 Elf_Internal_Verdaux
*dst
;
153 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
154 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
157 /* Swap out a Verdaux structure. */
160 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
162 const Elf_Internal_Verdaux
*src
;
163 Elf_External_Verdaux
*dst
;
165 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
166 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
169 /* Swap in a Verneed structure. */
172 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
174 const Elf_External_Verneed
*src
;
175 Elf_Internal_Verneed
*dst
;
177 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
178 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
179 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
180 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
181 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
184 /* Swap out a Verneed structure. */
187 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
189 const Elf_Internal_Verneed
*src
;
190 Elf_External_Verneed
*dst
;
192 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
193 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
194 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
195 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
196 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
199 /* Swap in a Vernaux structure. */
202 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
204 const Elf_External_Vernaux
*src
;
205 Elf_Internal_Vernaux
*dst
;
207 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
208 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
209 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
210 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
211 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
214 /* Swap out a Vernaux structure. */
217 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
219 const Elf_Internal_Vernaux
*src
;
220 Elf_External_Vernaux
*dst
;
222 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
223 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
224 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
225 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
226 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
229 /* Swap in a Versym structure. */
232 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
234 const Elf_External_Versym
*src
;
235 Elf_Internal_Versym
*dst
;
237 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
240 /* Swap out a Versym structure. */
243 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
245 const Elf_Internal_Versym
*src
;
246 Elf_External_Versym
*dst
;
248 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
251 /* Standard ELF hash function. Do not change this function; you will
252 cause invalid hash tables to be generated. */
255 bfd_elf_hash (namearg
)
258 const unsigned char *name
= (const unsigned char *) namearg
;
263 while ((ch
= *name
++) != '\0')
266 if ((g
= (h
& 0xf0000000)) != 0)
269 /* The ELF ABI says `h &= ~g', but this is equivalent in
270 this case and on some machines one insn instead of two. */
277 /* Read a specified number of bytes at a specified offset in an ELF
278 file, into a newly allocated buffer, and return a pointer to the
282 elf_read (abfd
, offset
, size
)
289 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
291 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
293 if (bfd_bread ((PTR
) buf
, size
, abfd
) != size
)
295 if (bfd_get_error () != bfd_error_system_call
)
296 bfd_set_error (bfd_error_file_truncated
);
303 bfd_elf_mkobject (abfd
)
306 /* This just does initialization. */
307 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
308 bfd_size_type amt
= sizeof (struct elf_obj_tdata
);
309 elf_tdata (abfd
) = (struct elf_obj_tdata
*) bfd_zalloc (abfd
, amt
);
310 if (elf_tdata (abfd
) == 0)
312 /* Since everything is done at close time, do we need any
319 bfd_elf_mkcorefile (abfd
)
322 /* I think this can be done just like an object file. */
323 return bfd_elf_mkobject (abfd
);
327 bfd_elf_get_str_section (abfd
, shindex
)
329 unsigned int shindex
;
331 Elf_Internal_Shdr
**i_shdrp
;
332 char *shstrtab
= NULL
;
334 bfd_size_type shstrtabsize
;
336 i_shdrp
= elf_elfsections (abfd
);
337 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
340 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
341 if (shstrtab
== NULL
)
343 /* No cached one, attempt to read, and cache what we read. */
344 offset
= i_shdrp
[shindex
]->sh_offset
;
345 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
346 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
347 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
353 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
355 unsigned int shindex
;
356 unsigned int strindex
;
358 Elf_Internal_Shdr
*hdr
;
363 hdr
= elf_elfsections (abfd
)[shindex
];
365 if (hdr
->contents
== NULL
366 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
369 if (strindex
>= hdr
->sh_size
)
371 (*_bfd_error_handler
)
372 (_("%s: invalid string offset %u >= %lu for section `%s'"),
373 bfd_archive_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
374 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
375 && strindex
== hdr
->sh_name
)
377 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
381 return ((char *) hdr
->contents
) + strindex
;
384 /* Read and convert symbols to internal format.
385 SYMCOUNT specifies the number of symbols to read, starting from
386 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
387 are non-NULL, they are used to store the internal symbols, external
388 symbols, and symbol section index extensions, respectively. */
391 bfd_elf_get_elf_syms (ibfd
, symtab_hdr
, symcount
, symoffset
,
392 intsym_buf
, extsym_buf
, extshndx_buf
)
394 Elf_Internal_Shdr
*symtab_hdr
;
397 Elf_Internal_Sym
*intsym_buf
;
399 Elf_External_Sym_Shndx
*extshndx_buf
;
401 Elf_Internal_Shdr
*shndx_hdr
;
403 const bfd_byte
*esym
;
404 Elf_External_Sym_Shndx
*alloc_extshndx
;
405 Elf_External_Sym_Shndx
*shndx
;
406 Elf_Internal_Sym
*isym
;
407 Elf_Internal_Sym
*isymend
;
408 struct elf_backend_data
*bed
;
416 /* Normal syms might have section extension entries. */
418 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
419 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
421 /* Read the symbols. */
423 alloc_extshndx
= NULL
;
424 bed
= get_elf_backend_data (ibfd
);
425 extsym_size
= bed
->s
->sizeof_sym
;
426 amt
= symcount
* extsym_size
;
427 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
428 if (extsym_buf
== NULL
)
430 alloc_ext
= bfd_malloc (amt
);
431 extsym_buf
= alloc_ext
;
433 if (extsym_buf
== NULL
434 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
435 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
441 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
445 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
446 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
447 if (extshndx_buf
== NULL
)
449 alloc_extshndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
450 extshndx_buf
= alloc_extshndx
;
452 if (extshndx_buf
== NULL
453 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
454 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
461 if (intsym_buf
== NULL
)
463 bfd_size_type amt
= symcount
* sizeof (Elf_Internal_Sym
);
464 intsym_buf
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
465 if (intsym_buf
== NULL
)
469 /* Convert the symbols to internal form. */
470 isymend
= intsym_buf
+ symcount
;
471 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
473 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
474 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, (const PTR
) shndx
, isym
);
477 if (alloc_ext
!= NULL
)
479 if (alloc_extshndx
!= NULL
)
480 free (alloc_extshndx
);
485 /* Look up a symbol name. */
487 bfd_elf_local_sym_name (abfd
, isym
)
489 Elf_Internal_Sym
*isym
;
491 unsigned int iname
= isym
->st_name
;
492 unsigned int shindex
= elf_tdata (abfd
)->symtab_hdr
.sh_link
;
493 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
495 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
496 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
499 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
502 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
503 sections. The first element is the flags, the rest are section
506 typedef union elf_internal_group
{
507 Elf_Internal_Shdr
*shdr
;
509 } Elf_Internal_Group
;
511 /* Return the name of the group signature symbol. Why isn't the
512 signature just a string? */
515 group_signature (abfd
, ghdr
)
517 Elf_Internal_Shdr
*ghdr
;
519 Elf_Internal_Shdr
*hdr
;
520 unsigned char esym
[sizeof (Elf64_External_Sym
)];
521 Elf_External_Sym_Shndx eshndx
;
522 Elf_Internal_Sym isym
;
524 /* First we need to ensure the symbol table is available. */
525 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
528 /* Go read the symbol. */
529 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
530 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
531 &isym
, esym
, &eshndx
) == NULL
)
534 return bfd_elf_local_sym_name (abfd
, &isym
);
537 /* Set next_in_group list pointer, and group name for NEWSECT. */
540 setup_group (abfd
, hdr
, newsect
)
542 Elf_Internal_Shdr
*hdr
;
545 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
547 /* If num_group is zero, read in all SHT_GROUP sections. The count
548 is set to -1 if there are no SHT_GROUP sections. */
551 unsigned int i
, shnum
;
553 /* First count the number of groups. If we have a SHT_GROUP
554 section with just a flag word (ie. sh_size is 4), ignore it. */
555 shnum
= elf_numsections (abfd
);
557 for (i
= 0; i
< shnum
; i
++)
559 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
560 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
565 num_group
= (unsigned) -1;
566 elf_tdata (abfd
)->num_group
= num_group
;
570 /* We keep a list of elf section headers for group sections,
571 so we can find them quickly. */
572 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
573 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
574 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
578 for (i
= 0; i
< shnum
; i
++)
580 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
581 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
584 Elf_Internal_Group
*dest
;
586 /* Add to list of sections. */
587 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
590 /* Read the raw contents. */
591 BFD_ASSERT (sizeof (*dest
) >= 4);
592 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
593 shdr
->contents
= bfd_alloc (abfd
, amt
);
594 if (shdr
->contents
== NULL
595 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
596 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
600 /* Translate raw contents, a flag word followed by an
601 array of elf section indices all in target byte order,
602 to the flag word followed by an array of elf section
604 src
= shdr
->contents
+ shdr
->sh_size
;
605 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
612 idx
= H_GET_32 (abfd
, src
);
613 if (src
== shdr
->contents
)
616 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
617 shdr
->bfd_section
->flags
618 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
623 ((*_bfd_error_handler
)
624 (_("%s: invalid SHT_GROUP entry"),
625 bfd_archive_filename (abfd
)));
628 dest
->shdr
= elf_elfsections (abfd
)[idx
];
635 if (num_group
!= (unsigned) -1)
639 for (i
= 0; i
< num_group
; i
++)
641 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
642 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
643 unsigned int n_elt
= shdr
->sh_size
/ 4;
645 /* Look through this group's sections to see if current
646 section is a member. */
648 if ((++idx
)->shdr
== hdr
)
652 /* We are a member of this group. Go looking through
653 other members to see if any others are linked via
655 idx
= (Elf_Internal_Group
*) shdr
->contents
;
656 n_elt
= shdr
->sh_size
/ 4;
658 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
659 && elf_next_in_group (s
) != NULL
)
663 /* Snarf the group name from other member, and
664 insert current section in circular list. */
665 elf_group_name (newsect
) = elf_group_name (s
);
666 elf_next_in_group (newsect
) = elf_next_in_group (s
);
667 elf_next_in_group (s
) = newsect
;
673 gname
= group_signature (abfd
, shdr
);
676 elf_group_name (newsect
) = gname
;
678 /* Start a circular list with one element. */
679 elf_next_in_group (newsect
) = newsect
;
682 /* If the group section has been created, point to the
684 if (shdr
->bfd_section
!= NULL
)
685 elf_next_in_group (shdr
->bfd_section
) = newsect
;
693 if (elf_group_name (newsect
) == NULL
)
695 (*_bfd_error_handler
) (_("%s: no group info for section %s"),
696 bfd_archive_filename (abfd
), newsect
->name
);
702 bfd_elf_discard_group (abfd
, group
)
703 bfd
*abfd ATTRIBUTE_UNUSED
;
706 asection
*first
= elf_next_in_group (group
);
711 s
->output_section
= bfd_abs_section_ptr
;
712 s
= elf_next_in_group (s
);
713 /* These lists are circular. */
720 /* Make a BFD section from an ELF section. We store a pointer to the
721 BFD section in the bfd_section field of the header. */
724 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
726 Elf_Internal_Shdr
*hdr
;
731 struct elf_backend_data
*bed
;
733 if (hdr
->bfd_section
!= NULL
)
735 BFD_ASSERT (strcmp (name
,
736 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
740 newsect
= bfd_make_section_anyway (abfd
, name
);
744 newsect
->filepos
= hdr
->sh_offset
;
746 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
747 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
748 || ! bfd_set_section_alignment (abfd
, newsect
,
749 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
752 flags
= SEC_NO_FLAGS
;
753 if (hdr
->sh_type
!= SHT_NOBITS
)
754 flags
|= SEC_HAS_CONTENTS
;
755 if (hdr
->sh_type
== SHT_GROUP
)
756 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
757 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
760 if (hdr
->sh_type
!= SHT_NOBITS
)
763 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
764 flags
|= SEC_READONLY
;
765 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
767 else if ((flags
& SEC_LOAD
) != 0)
769 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
772 newsect
->entsize
= hdr
->sh_entsize
;
773 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
774 flags
|= SEC_STRINGS
;
776 if (hdr
->sh_flags
& SHF_GROUP
)
777 if (!setup_group (abfd
, hdr
, newsect
))
779 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
780 flags
|= SEC_THREAD_LOCAL
;
782 /* The debugging sections appear to be recognized only by name, not
785 static const char *debug_sec_names
[] =
794 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
795 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
799 flags
|= SEC_DEBUGGING
;
802 /* As a GNU extension, if the name begins with .gnu.linkonce, we
803 only link a single copy of the section. This is used to support
804 g++. g++ will emit each template expansion in its own section.
805 The symbols will be defined as weak, so that multiple definitions
806 are permitted. The GNU linker extension is to actually discard
807 all but one of the sections. */
808 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
809 && elf_next_in_group (newsect
) == NULL
)
810 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
812 bed
= get_elf_backend_data (abfd
);
813 if (bed
->elf_backend_section_flags
)
814 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
817 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
820 if ((flags
& SEC_ALLOC
) != 0)
822 Elf_Internal_Phdr
*phdr
;
825 /* Look through the phdrs to see if we need to adjust the lma.
826 If all the p_paddr fields are zero, we ignore them, since
827 some ELF linkers produce such output. */
828 phdr
= elf_tdata (abfd
)->phdr
;
829 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
831 if (phdr
->p_paddr
!= 0)
834 if (i
< elf_elfheader (abfd
)->e_phnum
)
836 phdr
= elf_tdata (abfd
)->phdr
;
837 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
839 /* This section is part of this segment if its file
840 offset plus size lies within the segment's memory
841 span and, if the section is loaded, the extent of the
842 loaded data lies within the extent of the segment.
844 Note - we used to check the p_paddr field as well, and
845 refuse to set the LMA if it was 0. This is wrong
846 though, as a perfectly valid initialised segment can
847 have a p_paddr of zero. Some architectures, eg ARM,
848 place special significance on the address 0 and
849 executables need to be able to have a segment which
850 covers this address. */
851 if (phdr
->p_type
== PT_LOAD
852 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
853 && (hdr
->sh_offset
+ hdr
->sh_size
854 <= phdr
->p_offset
+ phdr
->p_memsz
)
855 && ((flags
& SEC_LOAD
) == 0
856 || (hdr
->sh_offset
+ hdr
->sh_size
857 <= phdr
->p_offset
+ phdr
->p_filesz
)))
859 if ((flags
& SEC_LOAD
) == 0)
860 newsect
->lma
= (phdr
->p_paddr
861 + hdr
->sh_addr
- phdr
->p_vaddr
);
863 /* We used to use the same adjustment for SEC_LOAD
864 sections, but that doesn't work if the segment
865 is packed with code from multiple VMAs.
866 Instead we calculate the section LMA based on
867 the segment LMA. It is assumed that the
868 segment will contain sections with contiguous
869 LMAs, even if the VMAs are not. */
870 newsect
->lma
= (phdr
->p_paddr
871 + hdr
->sh_offset
- phdr
->p_offset
);
873 /* With contiguous segments, we can't tell from file
874 offsets whether a section with zero size should
875 be placed at the end of one segment or the
876 beginning of the next. Decide based on vaddr. */
877 if (hdr
->sh_addr
>= phdr
->p_vaddr
878 && (hdr
->sh_addr
+ hdr
->sh_size
879 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
886 hdr
->bfd_section
= newsect
;
887 elf_section_data (newsect
)->this_hdr
= *hdr
;
897 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
900 Helper functions for GDB to locate the string tables.
901 Since BFD hides string tables from callers, GDB needs to use an
902 internal hook to find them. Sun's .stabstr, in particular,
903 isn't even pointed to by the .stab section, so ordinary
904 mechanisms wouldn't work to find it, even if we had some.
907 struct elf_internal_shdr
*
908 bfd_elf_find_section (abfd
, name
)
912 Elf_Internal_Shdr
**i_shdrp
;
917 i_shdrp
= elf_elfsections (abfd
);
920 shstrtab
= bfd_elf_get_str_section (abfd
,
921 elf_elfheader (abfd
)->e_shstrndx
);
922 if (shstrtab
!= NULL
)
924 max
= elf_numsections (abfd
);
925 for (i
= 1; i
< max
; i
++)
926 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
933 const char *const bfd_elf_section_type_names
[] = {
934 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
935 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
936 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
939 /* ELF relocs are against symbols. If we are producing relocateable
940 output, and the reloc is against an external symbol, and nothing
941 has given us any additional addend, the resulting reloc will also
942 be against the same symbol. In such a case, we don't want to
943 change anything about the way the reloc is handled, since it will
944 all be done at final link time. Rather than put special case code
945 into bfd_perform_relocation, all the reloc types use this howto
946 function. It just short circuits the reloc if producing
947 relocateable output against an external symbol. */
949 bfd_reloc_status_type
950 bfd_elf_generic_reloc (abfd
,
957 bfd
*abfd ATTRIBUTE_UNUSED
;
958 arelent
*reloc_entry
;
960 PTR data ATTRIBUTE_UNUSED
;
961 asection
*input_section
;
963 char **error_message ATTRIBUTE_UNUSED
;
965 if (output_bfd
!= (bfd
*) NULL
966 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
967 && (! reloc_entry
->howto
->partial_inplace
968 || reloc_entry
->addend
== 0))
970 reloc_entry
->address
+= input_section
->output_offset
;
974 return bfd_reloc_continue
;
977 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
980 merge_sections_remove_hook (abfd
, sec
)
981 bfd
*abfd ATTRIBUTE_UNUSED
;
984 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
985 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
988 /* Finish SHF_MERGE section merging. */
991 _bfd_elf_merge_sections (abfd
, info
)
993 struct bfd_link_info
*info
;
995 if (!is_elf_hash_table (info
))
997 if (elf_hash_table (info
)->merge_info
)
998 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
,
999 merge_sections_remove_hook
);
1004 _bfd_elf_link_just_syms (sec
, info
)
1006 struct bfd_link_info
*info
;
1008 sec
->output_section
= bfd_abs_section_ptr
;
1009 sec
->output_offset
= sec
->vma
;
1010 if (!is_elf_hash_table (info
))
1013 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
1016 /* Copy the program header and other data from one object module to
1020 _bfd_elf_copy_private_bfd_data (ibfd
, obfd
)
1024 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1025 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1028 BFD_ASSERT (!elf_flags_init (obfd
)
1029 || (elf_elfheader (obfd
)->e_flags
1030 == elf_elfheader (ibfd
)->e_flags
));
1032 elf_gp (obfd
) = elf_gp (ibfd
);
1033 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1034 elf_flags_init (obfd
) = TRUE
;
1038 /* Print out the program headers. */
1041 _bfd_elf_print_private_bfd_data (abfd
, farg
)
1045 FILE *f
= (FILE *) farg
;
1046 Elf_Internal_Phdr
*p
;
1048 bfd_byte
*dynbuf
= NULL
;
1050 p
= elf_tdata (abfd
)->phdr
;
1055 fprintf (f
, _("\nProgram Header:\n"));
1056 c
= elf_elfheader (abfd
)->e_phnum
;
1057 for (i
= 0; i
< c
; i
++, p
++)
1064 case PT_NULL
: pt
= "NULL"; break;
1065 case PT_LOAD
: pt
= "LOAD"; break;
1066 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1067 case PT_INTERP
: pt
= "INTERP"; break;
1068 case PT_NOTE
: pt
= "NOTE"; break;
1069 case PT_SHLIB
: pt
= "SHLIB"; break;
1070 case PT_PHDR
: pt
= "PHDR"; break;
1071 case PT_TLS
: pt
= "TLS"; break;
1072 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1073 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1075 fprintf (f
, "%8s off 0x", pt
);
1076 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1077 fprintf (f
, " vaddr 0x");
1078 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1079 fprintf (f
, " paddr 0x");
1080 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1081 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1082 fprintf (f
, " filesz 0x");
1083 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1084 fprintf (f
, " memsz 0x");
1085 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1086 fprintf (f
, " flags %c%c%c",
1087 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1088 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1089 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1090 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1091 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1096 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1100 unsigned long shlink
;
1101 bfd_byte
*extdyn
, *extdynend
;
1103 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1105 fprintf (f
, _("\nDynamic Section:\n"));
1107 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1110 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1114 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1117 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1119 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1120 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1123 extdynend
= extdyn
+ s
->_raw_size
;
1124 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1126 Elf_Internal_Dyn dyn
;
1129 bfd_boolean stringp
;
1131 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1133 if (dyn
.d_tag
== DT_NULL
)
1140 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1144 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1145 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1146 case DT_PLTGOT
: name
= "PLTGOT"; break;
1147 case DT_HASH
: name
= "HASH"; break;
1148 case DT_STRTAB
: name
= "STRTAB"; break;
1149 case DT_SYMTAB
: name
= "SYMTAB"; break;
1150 case DT_RELA
: name
= "RELA"; break;
1151 case DT_RELASZ
: name
= "RELASZ"; break;
1152 case DT_RELAENT
: name
= "RELAENT"; break;
1153 case DT_STRSZ
: name
= "STRSZ"; break;
1154 case DT_SYMENT
: name
= "SYMENT"; break;
1155 case DT_INIT
: name
= "INIT"; break;
1156 case DT_FINI
: name
= "FINI"; break;
1157 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1158 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1159 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1160 case DT_REL
: name
= "REL"; break;
1161 case DT_RELSZ
: name
= "RELSZ"; break;
1162 case DT_RELENT
: name
= "RELENT"; break;
1163 case DT_PLTREL
: name
= "PLTREL"; break;
1164 case DT_DEBUG
: name
= "DEBUG"; break;
1165 case DT_TEXTREL
: name
= "TEXTREL"; break;
1166 case DT_JMPREL
: name
= "JMPREL"; break;
1167 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1168 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1169 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1170 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1171 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1172 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1173 case DT_FLAGS
: name
= "FLAGS"; break;
1174 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1175 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1176 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1177 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1178 case DT_MOVEENT
: name
= "MOVEENT"; break;
1179 case DT_MOVESZ
: name
= "MOVESZ"; break;
1180 case DT_FEATURE
: name
= "FEATURE"; break;
1181 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1182 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1183 case DT_SYMINENT
: name
= "SYMINENT"; break;
1184 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1185 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1186 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1187 case DT_PLTPAD
: name
= "PLTPAD"; break;
1188 case DT_MOVETAB
: name
= "MOVETAB"; break;
1189 case DT_SYMINFO
: name
= "SYMINFO"; break;
1190 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1191 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1192 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1193 case DT_VERSYM
: name
= "VERSYM"; break;
1194 case DT_VERDEF
: name
= "VERDEF"; break;
1195 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1196 case DT_VERNEED
: name
= "VERNEED"; break;
1197 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1198 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1199 case DT_USED
: name
= "USED"; break;
1200 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1203 fprintf (f
, " %-11s ", name
);
1205 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1209 unsigned int tagv
= dyn
.d_un
.d_val
;
1211 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1214 fprintf (f
, "%s", string
);
1223 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1224 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1226 if (! _bfd_elf_slurp_version_tables (abfd
))
1230 if (elf_dynverdef (abfd
) != 0)
1232 Elf_Internal_Verdef
*t
;
1234 fprintf (f
, _("\nVersion definitions:\n"));
1235 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1237 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1238 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1239 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1241 Elf_Internal_Verdaux
*a
;
1244 for (a
= t
->vd_auxptr
->vda_nextptr
;
1247 fprintf (f
, "%s ", a
->vda_nodename
);
1253 if (elf_dynverref (abfd
) != 0)
1255 Elf_Internal_Verneed
*t
;
1257 fprintf (f
, _("\nVersion References:\n"));
1258 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1260 Elf_Internal_Vernaux
*a
;
1262 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1263 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1264 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1265 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1277 /* Display ELF-specific fields of a symbol. */
1280 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
1284 bfd_print_symbol_type how
;
1286 FILE *file
= (FILE *) filep
;
1289 case bfd_print_symbol_name
:
1290 fprintf (file
, "%s", symbol
->name
);
1292 case bfd_print_symbol_more
:
1293 fprintf (file
, "elf ");
1294 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1295 fprintf (file
, " %lx", (long) symbol
->flags
);
1297 case bfd_print_symbol_all
:
1299 const char *section_name
;
1300 const char *name
= NULL
;
1301 struct elf_backend_data
*bed
;
1302 unsigned char st_other
;
1305 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1307 bed
= get_elf_backend_data (abfd
);
1308 if (bed
->elf_backend_print_symbol_all
)
1309 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1313 name
= symbol
->name
;
1314 bfd_print_symbol_vandf (abfd
, (PTR
) file
, symbol
);
1317 fprintf (file
, " %s\t", section_name
);
1318 /* Print the "other" value for a symbol. For common symbols,
1319 we've already printed the size; now print the alignment.
1320 For other symbols, we have no specified alignment, and
1321 we've printed the address; now print the size. */
1322 if (bfd_is_com_section (symbol
->section
))
1323 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1325 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1326 bfd_fprintf_vma (abfd
, file
, val
);
1328 /* If we have version information, print it. */
1329 if (elf_tdata (abfd
)->dynversym_section
!= 0
1330 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1331 || elf_tdata (abfd
)->dynverref_section
!= 0))
1333 unsigned int vernum
;
1334 const char *version_string
;
1336 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1339 version_string
= "";
1340 else if (vernum
== 1)
1341 version_string
= "Base";
1342 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1344 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1347 Elf_Internal_Verneed
*t
;
1349 version_string
= "";
1350 for (t
= elf_tdata (abfd
)->verref
;
1354 Elf_Internal_Vernaux
*a
;
1356 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1358 if (a
->vna_other
== vernum
)
1360 version_string
= a
->vna_nodename
;
1367 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1368 fprintf (file
, " %-11s", version_string
);
1373 fprintf (file
, " (%s)", version_string
);
1374 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1379 /* If the st_other field is not zero, print it. */
1380 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1385 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1386 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1387 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1389 /* Some other non-defined flags are also present, so print
1391 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1394 fprintf (file
, " %s", name
);
1400 /* Create an entry in an ELF linker hash table. */
1402 struct bfd_hash_entry
*
1403 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
1404 struct bfd_hash_entry
*entry
;
1405 struct bfd_hash_table
*table
;
1408 /* Allocate the structure if it has not already been allocated by a
1412 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1417 /* Call the allocation method of the superclass. */
1418 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1421 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1422 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1424 /* Set local fields. */
1427 ret
->dynstr_index
= 0;
1428 ret
->elf_hash_value
= 0;
1429 ret
->weakdef
= NULL
;
1430 ret
->linker_section_pointer
= NULL
;
1431 ret
->verinfo
.verdef
= NULL
;
1432 ret
->vtable_entries_size
= 0;
1433 ret
->vtable_entries_used
= NULL
;
1434 ret
->vtable_parent
= NULL
;
1435 ret
->got
= htab
->init_refcount
;
1436 ret
->plt
= htab
->init_refcount
;
1438 ret
->type
= STT_NOTYPE
;
1440 /* Assume that we have been called by a non-ELF symbol reader.
1441 This flag is then reset by the code which reads an ELF input
1442 file. This ensures that a symbol created by a non-ELF symbol
1443 reader will have the flag set correctly. */
1444 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1450 /* Copy data from an indirect symbol to its direct symbol, hiding the
1451 old indirect symbol. Also used for copying flags to a weakdef. */
1454 _bfd_elf_link_hash_copy_indirect (bed
, dir
, ind
)
1455 struct elf_backend_data
*bed
;
1456 struct elf_link_hash_entry
*dir
, *ind
;
1459 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1461 /* Copy down any references that we may have already seen to the
1462 symbol which just became indirect. */
1464 dir
->elf_link_hash_flags
|=
1465 (ind
->elf_link_hash_flags
1466 & (ELF_LINK_HASH_REF_DYNAMIC
1467 | ELF_LINK_HASH_REF_REGULAR
1468 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1469 | ELF_LINK_NON_GOT_REF
));
1471 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1474 /* Copy over the global and procedure linkage table refcount entries.
1475 These may have been already set up by a check_relocs routine. */
1476 tmp
= dir
->got
.refcount
;
1477 if (tmp
< lowest_valid
)
1479 dir
->got
.refcount
= ind
->got
.refcount
;
1480 ind
->got
.refcount
= tmp
;
1483 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1485 tmp
= dir
->plt
.refcount
;
1486 if (tmp
< lowest_valid
)
1488 dir
->plt
.refcount
= ind
->plt
.refcount
;
1489 ind
->plt
.refcount
= tmp
;
1492 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1494 if (dir
->dynindx
== -1)
1496 dir
->dynindx
= ind
->dynindx
;
1497 dir
->dynstr_index
= ind
->dynstr_index
;
1499 ind
->dynstr_index
= 0;
1502 BFD_ASSERT (ind
->dynindx
== -1);
1506 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
)
1507 struct bfd_link_info
*info
;
1508 struct elf_link_hash_entry
*h
;
1509 bfd_boolean force_local
;
1511 h
->plt
= elf_hash_table (info
)->init_offset
;
1512 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1515 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1516 if (h
->dynindx
!= -1)
1519 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1525 /* Initialize an ELF linker hash table. */
1528 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1529 struct elf_link_hash_table
*table
;
1531 struct bfd_hash_entry
*(*newfunc
)
1532 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*,
1537 table
->dynamic_sections_created
= FALSE
;
1538 table
->dynobj
= NULL
;
1539 /* Make sure can_refcount is extended to the width and signedness of
1540 init_refcount before we subtract one from it. */
1541 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1542 table
->init_refcount
.refcount
-= 1;
1543 table
->init_offset
.offset
= -(bfd_vma
) 1;
1544 /* The first dynamic symbol is a dummy. */
1545 table
->dynsymcount
= 1;
1546 table
->dynstr
= NULL
;
1547 table
->bucketcount
= 0;
1548 table
->needed
= NULL
;
1550 table
->stab_info
= NULL
;
1551 table
->merge_info
= NULL
;
1552 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1553 table
->dynlocal
= NULL
;
1554 table
->runpath
= NULL
;
1555 table
->tls_segment
= NULL
;
1556 table
->loaded
= NULL
;
1558 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1559 table
->root
.type
= bfd_link_elf_hash_table
;
1564 /* Create an ELF linker hash table. */
1566 struct bfd_link_hash_table
*
1567 _bfd_elf_link_hash_table_create (abfd
)
1570 struct elf_link_hash_table
*ret
;
1571 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1573 ret
= (struct elf_link_hash_table
*) bfd_malloc (amt
);
1574 if (ret
== (struct elf_link_hash_table
*) NULL
)
1577 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1586 /* This is a hook for the ELF emulation code in the generic linker to
1587 tell the backend linker what file name to use for the DT_NEEDED
1588 entry for a dynamic object. The generic linker passes name as an
1589 empty string to indicate that no DT_NEEDED entry should be made. */
1592 bfd_elf_set_dt_needed_name (abfd
, name
)
1596 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1597 && bfd_get_format (abfd
) == bfd_object
)
1598 elf_dt_name (abfd
) = name
;
1602 bfd_elf_set_dt_needed_soname (abfd
, name
)
1606 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1607 && bfd_get_format (abfd
) == bfd_object
)
1608 elf_dt_soname (abfd
) = name
;
1611 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1612 the linker ELF emulation code. */
1614 struct bfd_link_needed_list
*
1615 bfd_elf_get_needed_list (abfd
, info
)
1616 bfd
*abfd ATTRIBUTE_UNUSED
;
1617 struct bfd_link_info
*info
;
1619 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1621 return elf_hash_table (info
)->needed
;
1624 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1625 hook for the linker ELF emulation code. */
1627 struct bfd_link_needed_list
*
1628 bfd_elf_get_runpath_list (abfd
, info
)
1629 bfd
*abfd ATTRIBUTE_UNUSED
;
1630 struct bfd_link_info
*info
;
1632 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1634 return elf_hash_table (info
)->runpath
;
1637 /* Get the name actually used for a dynamic object for a link. This
1638 is the SONAME entry if there is one. Otherwise, it is the string
1639 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1642 bfd_elf_get_dt_soname (abfd
)
1645 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1646 && bfd_get_format (abfd
) == bfd_object
)
1647 return elf_dt_name (abfd
);
1651 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1652 the ELF linker emulation code. */
1655 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1657 struct bfd_link_needed_list
**pneeded
;
1660 bfd_byte
*dynbuf
= NULL
;
1662 unsigned long shlink
;
1663 bfd_byte
*extdyn
, *extdynend
;
1665 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1669 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1670 || bfd_get_format (abfd
) != bfd_object
)
1673 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1674 if (s
== NULL
|| s
->_raw_size
== 0)
1677 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1681 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1685 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1689 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1691 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1692 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1695 extdynend
= extdyn
+ s
->_raw_size
;
1696 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1698 Elf_Internal_Dyn dyn
;
1700 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1702 if (dyn
.d_tag
== DT_NULL
)
1705 if (dyn
.d_tag
== DT_NEEDED
)
1708 struct bfd_link_needed_list
*l
;
1709 unsigned int tagv
= dyn
.d_un
.d_val
;
1712 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1717 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1738 /* Allocate an ELF string table--force the first byte to be zero. */
1740 struct bfd_strtab_hash
*
1741 _bfd_elf_stringtab_init ()
1743 struct bfd_strtab_hash
*ret
;
1745 ret
= _bfd_stringtab_init ();
1750 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1751 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1752 if (loc
== (bfd_size_type
) -1)
1754 _bfd_stringtab_free (ret
);
1761 /* ELF .o/exec file reading */
1763 /* Create a new bfd section from an ELF section header. */
1766 bfd_section_from_shdr (abfd
, shindex
)
1768 unsigned int shindex
;
1770 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1771 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1772 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1775 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1777 switch (hdr
->sh_type
)
1780 /* Inactive section. Throw it away. */
1783 case SHT_PROGBITS
: /* Normal section with contents. */
1784 case SHT_NOBITS
: /* .bss section. */
1785 case SHT_HASH
: /* .hash section. */
1786 case SHT_NOTE
: /* .note section. */
1787 case SHT_INIT_ARRAY
: /* .init_array section. */
1788 case SHT_FINI_ARRAY
: /* .fini_array section. */
1789 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1790 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1792 case SHT_DYNAMIC
: /* Dynamic linking information. */
1793 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1795 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1797 Elf_Internal_Shdr
*dynsymhdr
;
1799 /* The shared libraries distributed with hpux11 have a bogus
1800 sh_link field for the ".dynamic" section. Find the
1801 string table for the ".dynsym" section instead. */
1802 if (elf_dynsymtab (abfd
) != 0)
1804 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1805 hdr
->sh_link
= dynsymhdr
->sh_link
;
1809 unsigned int i
, num_sec
;
1811 num_sec
= elf_numsections (abfd
);
1812 for (i
= 1; i
< num_sec
; i
++)
1814 dynsymhdr
= elf_elfsections (abfd
)[i
];
1815 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1817 hdr
->sh_link
= dynsymhdr
->sh_link
;
1825 case SHT_SYMTAB
: /* A symbol table */
1826 if (elf_onesymtab (abfd
) == shindex
)
1829 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1830 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1831 elf_onesymtab (abfd
) = shindex
;
1832 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1833 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1834 abfd
->flags
|= HAS_SYMS
;
1836 /* Sometimes a shared object will map in the symbol table. If
1837 SHF_ALLOC is set, and this is a shared object, then we also
1838 treat this section as a BFD section. We can not base the
1839 decision purely on SHF_ALLOC, because that flag is sometimes
1840 set in a relocateable object file, which would confuse the
1842 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1843 && (abfd
->flags
& DYNAMIC
) != 0
1844 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1849 case SHT_DYNSYM
: /* A dynamic symbol table */
1850 if (elf_dynsymtab (abfd
) == shindex
)
1853 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1854 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1855 elf_dynsymtab (abfd
) = shindex
;
1856 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1857 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1858 abfd
->flags
|= HAS_SYMS
;
1860 /* Besides being a symbol table, we also treat this as a regular
1861 section, so that objcopy can handle it. */
1862 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1864 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1865 if (elf_symtab_shndx (abfd
) == shindex
)
1868 /* Get the associated symbol table. */
1869 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1870 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1873 elf_symtab_shndx (abfd
) = shindex
;
1874 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1875 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1878 case SHT_STRTAB
: /* A string table */
1879 if (hdr
->bfd_section
!= NULL
)
1881 if (ehdr
->e_shstrndx
== shindex
)
1883 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1884 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1888 unsigned int i
, num_sec
;
1890 num_sec
= elf_numsections (abfd
);
1891 for (i
= 1; i
< num_sec
; i
++)
1893 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1894 if (hdr2
->sh_link
== shindex
)
1896 if (! bfd_section_from_shdr (abfd
, i
))
1898 if (elf_onesymtab (abfd
) == i
)
1900 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1901 elf_elfsections (abfd
)[shindex
] =
1902 &elf_tdata (abfd
)->strtab_hdr
;
1905 if (elf_dynsymtab (abfd
) == i
)
1907 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1908 elf_elfsections (abfd
)[shindex
] = hdr
=
1909 &elf_tdata (abfd
)->dynstrtab_hdr
;
1910 /* We also treat this as a regular section, so
1911 that objcopy can handle it. */
1914 #if 0 /* Not handling other string tables specially right now. */
1915 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1916 /* We have a strtab for some random other section. */
1917 newsect
= (asection
*) hdr2
->bfd_section
;
1920 hdr
->bfd_section
= newsect
;
1921 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1923 elf_elfsections (abfd
)[shindex
] = hdr2
;
1929 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1933 /* *These* do a lot of work -- but build no sections! */
1935 asection
*target_sect
;
1936 Elf_Internal_Shdr
*hdr2
;
1937 unsigned int num_sec
= elf_numsections (abfd
);
1939 /* Check for a bogus link to avoid crashing. */
1940 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1941 || hdr
->sh_link
>= num_sec
)
1943 ((*_bfd_error_handler
)
1944 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1945 bfd_archive_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1946 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1949 /* For some incomprehensible reason Oracle distributes
1950 libraries for Solaris in which some of the objects have
1951 bogus sh_link fields. It would be nice if we could just
1952 reject them, but, unfortunately, some people need to use
1953 them. We scan through the section headers; if we find only
1954 one suitable symbol table, we clobber the sh_link to point
1955 to it. I hope this doesn't break anything. */
1956 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1957 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1963 for (scan
= 1; scan
< num_sec
; scan
++)
1965 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1966 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1977 hdr
->sh_link
= found
;
1980 /* Get the symbol table. */
1981 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1982 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1985 /* If this reloc section does not use the main symbol table we
1986 don't treat it as a reloc section. BFD can't adequately
1987 represent such a section, so at least for now, we don't
1988 try. We just present it as a normal section. We also
1989 can't use it as a reloc section if it points to the null
1991 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1992 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1994 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1996 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1997 if (target_sect
== NULL
)
2000 if ((target_sect
->flags
& SEC_RELOC
) == 0
2001 || target_sect
->reloc_count
== 0)
2002 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
2006 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
2007 amt
= sizeof (*hdr2
);
2008 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
2009 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
2012 elf_elfsections (abfd
)[shindex
] = hdr2
;
2013 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
2014 target_sect
->flags
|= SEC_RELOC
;
2015 target_sect
->relocation
= NULL
;
2016 target_sect
->rel_filepos
= hdr
->sh_offset
;
2017 /* In the section to which the relocations apply, mark whether
2018 its relocations are of the REL or RELA variety. */
2019 if (hdr
->sh_size
!= 0)
2020 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2021 abfd
->flags
|= HAS_RELOC
;
2026 case SHT_GNU_verdef
:
2027 elf_dynverdef (abfd
) = shindex
;
2028 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2029 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2032 case SHT_GNU_versym
:
2033 elf_dynversym (abfd
) = shindex
;
2034 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2035 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2038 case SHT_GNU_verneed
:
2039 elf_dynverref (abfd
) = shindex
;
2040 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2041 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2048 /* We need a BFD section for objcopy and relocatable linking,
2049 and it's handy to have the signature available as the section
2051 name
= group_signature (abfd
, hdr
);
2054 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
2056 if (hdr
->contents
!= NULL
)
2058 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2059 unsigned int n_elt
= hdr
->sh_size
/ 4;
2062 if (idx
->flags
& GRP_COMDAT
)
2063 hdr
->bfd_section
->flags
2064 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2066 while (--n_elt
!= 0)
2067 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
2068 && elf_next_in_group (s
) != NULL
)
2070 elf_next_in_group (hdr
->bfd_section
) = s
;
2077 /* Check for any processor-specific section types. */
2079 if (bed
->elf_backend_section_from_shdr
)
2080 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
2088 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2089 Return SEC for sections that have no elf section, and NULL on error. */
2092 bfd_section_from_r_symndx (abfd
, cache
, sec
, r_symndx
)
2094 struct sym_sec_cache
*cache
;
2096 unsigned long r_symndx
;
2098 Elf_Internal_Shdr
*symtab_hdr
;
2099 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2100 Elf_External_Sym_Shndx eshndx
;
2101 Elf_Internal_Sym isym
;
2102 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2104 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2105 return cache
->sec
[ent
];
2107 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2108 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2109 &isym
, esym
, &eshndx
) == NULL
)
2112 if (cache
->abfd
!= abfd
)
2114 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2117 cache
->indx
[ent
] = r_symndx
;
2118 cache
->sec
[ent
] = sec
;
2119 if (isym
.st_shndx
< SHN_LORESERVE
|| isym
.st_shndx
> SHN_HIRESERVE
)
2122 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2124 cache
->sec
[ent
] = s
;
2126 return cache
->sec
[ent
];
2129 /* Given an ELF section number, retrieve the corresponding BFD
2133 bfd_section_from_elf_index (abfd
, index
)
2137 if (index
>= elf_numsections (abfd
))
2139 return elf_elfsections (abfd
)[index
]->bfd_section
;
2143 _bfd_elf_new_section_hook (abfd
, sec
)
2147 struct bfd_elf_section_data
*sdata
;
2149 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2152 bfd_size_type amt
= sizeof (*sdata
);
2153 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, amt
);
2156 sec
->used_by_bfd
= (PTR
) sdata
;
2159 /* Indicate whether or not this section should use RELA relocations. */
2160 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2165 /* Create a new bfd section from an ELF program header.
2167 Since program segments have no names, we generate a synthetic name
2168 of the form segment<NUM>, where NUM is generally the index in the
2169 program header table. For segments that are split (see below) we
2170 generate the names segment<NUM>a and segment<NUM>b.
2172 Note that some program segments may have a file size that is different than
2173 (less than) the memory size. All this means is that at execution the
2174 system must allocate the amount of memory specified by the memory size,
2175 but only initialize it with the first "file size" bytes read from the
2176 file. This would occur for example, with program segments consisting
2177 of combined data+bss.
2179 To handle the above situation, this routine generates TWO bfd sections
2180 for the single program segment. The first has the length specified by
2181 the file size of the segment, and the second has the length specified
2182 by the difference between the two sizes. In effect, the segment is split
2183 into it's initialized and uninitialized parts.
2188 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
2190 Elf_Internal_Phdr
*hdr
;
2192 const char *typename
;
2200 split
= ((hdr
->p_memsz
> 0)
2201 && (hdr
->p_filesz
> 0)
2202 && (hdr
->p_memsz
> hdr
->p_filesz
));
2203 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2204 len
= strlen (namebuf
) + 1;
2205 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
2208 memcpy (name
, namebuf
, len
);
2209 newsect
= bfd_make_section (abfd
, name
);
2210 if (newsect
== NULL
)
2212 newsect
->vma
= hdr
->p_vaddr
;
2213 newsect
->lma
= hdr
->p_paddr
;
2214 newsect
->_raw_size
= hdr
->p_filesz
;
2215 newsect
->filepos
= hdr
->p_offset
;
2216 newsect
->flags
|= SEC_HAS_CONTENTS
;
2217 if (hdr
->p_type
== PT_LOAD
)
2219 newsect
->flags
|= SEC_ALLOC
;
2220 newsect
->flags
|= SEC_LOAD
;
2221 if (hdr
->p_flags
& PF_X
)
2223 /* FIXME: all we known is that it has execute PERMISSION,
2225 newsect
->flags
|= SEC_CODE
;
2228 if (!(hdr
->p_flags
& PF_W
))
2230 newsect
->flags
|= SEC_READONLY
;
2235 sprintf (namebuf
, "%s%db", typename
, index
);
2236 len
= strlen (namebuf
) + 1;
2237 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
2240 memcpy (name
, namebuf
, len
);
2241 newsect
= bfd_make_section (abfd
, name
);
2242 if (newsect
== NULL
)
2244 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2245 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2246 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
2247 if (hdr
->p_type
== PT_LOAD
)
2249 newsect
->flags
|= SEC_ALLOC
;
2250 if (hdr
->p_flags
& PF_X
)
2251 newsect
->flags
|= SEC_CODE
;
2253 if (!(hdr
->p_flags
& PF_W
))
2254 newsect
->flags
|= SEC_READONLY
;
2261 bfd_section_from_phdr (abfd
, hdr
, index
)
2263 Elf_Internal_Phdr
*hdr
;
2266 struct elf_backend_data
*bed
;
2268 switch (hdr
->p_type
)
2271 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2274 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2277 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2280 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2283 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2285 if (! elfcore_read_notes (abfd
, (file_ptr
) hdr
->p_offset
, hdr
->p_filesz
))
2290 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2293 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2296 /* Check for any processor-specific program segment types.
2297 If no handler for them, default to making "segment" sections. */
2298 bed
= get_elf_backend_data (abfd
);
2299 if (bed
->elf_backend_section_from_phdr
)
2300 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2302 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2306 /* Initialize REL_HDR, the section-header for new section, containing
2307 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2308 relocations; otherwise, we use REL relocations. */
2311 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
2313 Elf_Internal_Shdr
*rel_hdr
;
2315 bfd_boolean use_rela_p
;
2318 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2319 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2321 name
= bfd_alloc (abfd
, amt
);
2324 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2326 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2328 if (rel_hdr
->sh_name
== (unsigned int) -1)
2330 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2331 rel_hdr
->sh_entsize
= (use_rela_p
2332 ? bed
->s
->sizeof_rela
2333 : bed
->s
->sizeof_rel
);
2334 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
2335 rel_hdr
->sh_flags
= 0;
2336 rel_hdr
->sh_addr
= 0;
2337 rel_hdr
->sh_size
= 0;
2338 rel_hdr
->sh_offset
= 0;
2343 /* Set up an ELF internal section header for a section. */
2346 elf_fake_sections (abfd
, asect
, failedptrarg
)
2351 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2352 bfd_boolean
*failedptr
= (bfd_boolean
*) failedptrarg
;
2353 Elf_Internal_Shdr
*this_hdr
;
2357 /* We already failed; just get out of the bfd_map_over_sections
2362 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2364 this_hdr
->sh_name
= (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2365 asect
->name
, FALSE
);
2366 if (this_hdr
->sh_name
== (unsigned long) -1)
2372 this_hdr
->sh_flags
= 0;
2374 if ((asect
->flags
& SEC_ALLOC
) != 0
2375 || asect
->user_set_vma
)
2376 this_hdr
->sh_addr
= asect
->vma
;
2378 this_hdr
->sh_addr
= 0;
2380 this_hdr
->sh_offset
= 0;
2381 this_hdr
->sh_size
= asect
->_raw_size
;
2382 this_hdr
->sh_link
= 0;
2383 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2384 /* The sh_entsize and sh_info fields may have been set already by
2385 copy_private_section_data. */
2387 this_hdr
->bfd_section
= asect
;
2388 this_hdr
->contents
= NULL
;
2390 /* FIXME: This should not be based on section names. */
2391 if (strcmp (asect
->name
, ".dynstr") == 0)
2392 this_hdr
->sh_type
= SHT_STRTAB
;
2393 else if (strcmp (asect
->name
, ".hash") == 0)
2395 this_hdr
->sh_type
= SHT_HASH
;
2396 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2398 else if (strcmp (asect
->name
, ".dynsym") == 0)
2400 this_hdr
->sh_type
= SHT_DYNSYM
;
2401 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2403 else if (strcmp (asect
->name
, ".dynamic") == 0)
2405 this_hdr
->sh_type
= SHT_DYNAMIC
;
2406 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2408 else if (strncmp (asect
->name
, ".rela", 5) == 0
2409 && get_elf_backend_data (abfd
)->may_use_rela_p
)
2411 this_hdr
->sh_type
= SHT_RELA
;
2412 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2414 else if (strncmp (asect
->name
, ".rel", 4) == 0
2415 && get_elf_backend_data (abfd
)->may_use_rel_p
)
2417 this_hdr
->sh_type
= SHT_REL
;
2418 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2420 else if (strcmp (asect
->name
, ".init_array") == 0)
2421 this_hdr
->sh_type
= SHT_INIT_ARRAY
;
2422 else if (strcmp (asect
->name
, ".fini_array") == 0)
2423 this_hdr
->sh_type
= SHT_FINI_ARRAY
;
2424 else if (strcmp (asect
->name
, ".preinit_array") == 0)
2425 this_hdr
->sh_type
= SHT_PREINIT_ARRAY
;
2426 else if (strncmp (asect
->name
, ".note", 5) == 0)
2427 this_hdr
->sh_type
= SHT_NOTE
;
2428 else if (strncmp (asect
->name
, ".stab", 5) == 0
2429 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
2430 this_hdr
->sh_type
= SHT_STRTAB
;
2431 else if (strcmp (asect
->name
, ".gnu.version") == 0)
2433 this_hdr
->sh_type
= SHT_GNU_versym
;
2434 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2436 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
2438 this_hdr
->sh_type
= SHT_GNU_verdef
;
2439 this_hdr
->sh_entsize
= 0;
2440 /* objcopy or strip will copy over sh_info, but may not set
2441 cverdefs. The linker will set cverdefs, but sh_info will be
2443 if (this_hdr
->sh_info
== 0)
2444 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2446 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2447 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2449 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
2451 this_hdr
->sh_type
= SHT_GNU_verneed
;
2452 this_hdr
->sh_entsize
= 0;
2453 /* objcopy or strip will copy over sh_info, but may not set
2454 cverrefs. The linker will set cverrefs, but sh_info will be
2456 if (this_hdr
->sh_info
== 0)
2457 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2459 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2460 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2462 else if ((asect
->flags
& SEC_GROUP
) != 0)
2464 this_hdr
->sh_type
= SHT_GROUP
;
2465 this_hdr
->sh_entsize
= 4;
2467 else if ((asect
->flags
& SEC_ALLOC
) != 0
2468 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2469 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2470 this_hdr
->sh_type
= SHT_NOBITS
;
2472 this_hdr
->sh_type
= SHT_PROGBITS
;
2474 if ((asect
->flags
& SEC_ALLOC
) != 0)
2475 this_hdr
->sh_flags
|= SHF_ALLOC
;
2476 if ((asect
->flags
& SEC_READONLY
) == 0)
2477 this_hdr
->sh_flags
|= SHF_WRITE
;
2478 if ((asect
->flags
& SEC_CODE
) != 0)
2479 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2480 if ((asect
->flags
& SEC_MERGE
) != 0)
2482 this_hdr
->sh_flags
|= SHF_MERGE
;
2483 this_hdr
->sh_entsize
= asect
->entsize
;
2484 if ((asect
->flags
& SEC_STRINGS
) != 0)
2485 this_hdr
->sh_flags
|= SHF_STRINGS
;
2487 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2488 this_hdr
->sh_flags
|= SHF_GROUP
;
2489 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2491 this_hdr
->sh_flags
|= SHF_TLS
;
2492 if (asect
->_raw_size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2494 struct bfd_link_order
*o
;
2496 this_hdr
->sh_size
= 0;
2497 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2498 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2499 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2500 if (this_hdr
->sh_size
)
2501 this_hdr
->sh_type
= SHT_NOBITS
;
2505 /* Check for processor-specific section types. */
2506 if (bed
->elf_backend_fake_sections
2507 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2510 /* If the section has relocs, set up a section header for the
2511 SHT_REL[A] section. If two relocation sections are required for
2512 this section, it is up to the processor-specific back-end to
2513 create the other. */
2514 if ((asect
->flags
& SEC_RELOC
) != 0
2515 && !_bfd_elf_init_reloc_shdr (abfd
,
2516 &elf_section_data (asect
)->rel_hdr
,
2522 /* Fill in the contents of a SHT_GROUP section. */
2525 bfd_elf_set_group_contents (abfd
, sec
, failedptrarg
)
2530 bfd_boolean
*failedptr
= (bfd_boolean
*) failedptrarg
;
2531 unsigned long symindx
;
2532 asection
*elt
, *first
;
2534 struct bfd_link_order
*l
;
2537 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2542 if (elf_group_id (sec
) != NULL
)
2543 symindx
= elf_group_id (sec
)->udata
.i
;
2547 /* If called from the assembler, swap_out_syms will have set up
2548 elf_section_syms; If called for "ld -r", use target_index. */
2549 if (elf_section_syms (abfd
) != NULL
)
2550 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2552 symindx
= sec
->target_index
;
2554 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2556 /* The contents won't be allocated for "ld -r" or objcopy. */
2558 if (sec
->contents
== NULL
)
2561 sec
->contents
= bfd_alloc (abfd
, sec
->_raw_size
);
2563 /* Arrange for the section to be written out. */
2564 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2565 if (sec
->contents
== NULL
)
2572 loc
= sec
->contents
+ sec
->_raw_size
;
2574 /* Get the pointer to the first section in the group that gas
2575 squirreled away here. objcopy arranges for this to be set to the
2576 start of the input section group. */
2577 first
= elt
= elf_next_in_group (sec
);
2579 /* First element is a flag word. Rest of section is elf section
2580 indices for all the sections of the group. Write them backwards
2581 just to keep the group in the same order as given in .section
2582 directives, not that it matters. */
2591 s
= s
->output_section
;
2594 idx
= elf_section_data (s
)->this_idx
;
2595 H_PUT_32 (abfd
, idx
, loc
);
2596 elt
= elf_next_in_group (elt
);
2601 /* If this is a relocatable link, then the above did nothing because
2602 SEC is the output section. Look through the input sections
2604 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2605 if (l
->type
== bfd_indirect_link_order
2606 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2611 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2612 elt
= elf_next_in_group (elt
);
2613 /* During a relocatable link, the lists are circular. */
2615 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2617 /* With ld -r, merging SHT_GROUP sections results in wasted space
2618 due to allowing for the flag word on each input. We may well
2619 duplicate entries too. */
2620 while ((loc
-= 4) > sec
->contents
)
2621 H_PUT_32 (abfd
, 0, loc
);
2623 if (loc
!= sec
->contents
)
2626 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2629 /* Assign all ELF section numbers. The dummy first section is handled here
2630 too. The link/info pointers for the standard section types are filled
2631 in here too, while we're at it. */
2634 assign_section_numbers (abfd
)
2637 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2639 unsigned int section_number
, secn
;
2640 Elf_Internal_Shdr
**i_shdrp
;
2645 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2647 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2649 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2651 if (section_number
== SHN_LORESERVE
)
2652 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2653 d
->this_idx
= section_number
++;
2654 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2655 if ((sec
->flags
& SEC_RELOC
) == 0)
2659 if (section_number
== SHN_LORESERVE
)
2660 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2661 d
->rel_idx
= section_number
++;
2662 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2667 if (section_number
== SHN_LORESERVE
)
2668 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2669 d
->rel_idx2
= section_number
++;
2670 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2676 if (section_number
== SHN_LORESERVE
)
2677 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2678 t
->shstrtab_section
= section_number
++;
2679 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2680 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2682 if (bfd_get_symcount (abfd
) > 0)
2684 if (section_number
== SHN_LORESERVE
)
2685 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2686 t
->symtab_section
= section_number
++;
2687 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2688 if (section_number
> SHN_LORESERVE
- 2)
2690 if (section_number
== SHN_LORESERVE
)
2691 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2692 t
->symtab_shndx_section
= section_number
++;
2693 t
->symtab_shndx_hdr
.sh_name
2694 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2695 ".symtab_shndx", FALSE
);
2696 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2699 if (section_number
== SHN_LORESERVE
)
2700 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2701 t
->strtab_section
= section_number
++;
2702 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2705 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2706 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2708 elf_numsections (abfd
) = section_number
;
2709 elf_elfheader (abfd
)->e_shnum
= section_number
;
2710 if (section_number
> SHN_LORESERVE
)
2711 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2713 /* Set up the list of section header pointers, in agreement with the
2715 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2716 i_shdrp
= (Elf_Internal_Shdr
**) bfd_zalloc (abfd
, amt
);
2717 if (i_shdrp
== NULL
)
2720 amt
= sizeof (Elf_Internal_Shdr
);
2721 i_shdrp
[0] = (Elf_Internal_Shdr
*) bfd_zalloc (abfd
, amt
);
2722 if (i_shdrp
[0] == NULL
)
2724 bfd_release (abfd
, i_shdrp
);
2728 elf_elfsections (abfd
) = i_shdrp
;
2730 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2731 if (bfd_get_symcount (abfd
) > 0)
2733 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2734 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2736 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2737 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2739 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2740 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2742 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2744 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2748 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2749 if (d
->rel_idx
!= 0)
2750 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2751 if (d
->rel_idx2
!= 0)
2752 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2754 /* Fill in the sh_link and sh_info fields while we're at it. */
2756 /* sh_link of a reloc section is the section index of the symbol
2757 table. sh_info is the section index of the section to which
2758 the relocation entries apply. */
2759 if (d
->rel_idx
!= 0)
2761 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2762 d
->rel_hdr
.sh_info
= d
->this_idx
;
2764 if (d
->rel_idx2
!= 0)
2766 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2767 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2770 switch (d
->this_hdr
.sh_type
)
2774 /* A reloc section which we are treating as a normal BFD
2775 section. sh_link is the section index of the symbol
2776 table. sh_info is the section index of the section to
2777 which the relocation entries apply. We assume that an
2778 allocated reloc section uses the dynamic symbol table.
2779 FIXME: How can we be sure? */
2780 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2782 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2784 /* We look up the section the relocs apply to by name. */
2786 if (d
->this_hdr
.sh_type
== SHT_REL
)
2790 s
= bfd_get_section_by_name (abfd
, name
);
2792 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2796 /* We assume that a section named .stab*str is a stabs
2797 string section. We look for a section with the same name
2798 but without the trailing ``str'', and set its sh_link
2799 field to point to this section. */
2800 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2801 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2806 len
= strlen (sec
->name
);
2807 alc
= (char *) bfd_malloc ((bfd_size_type
) (len
- 2));
2810 memcpy (alc
, sec
->name
, len
- 3);
2811 alc
[len
- 3] = '\0';
2812 s
= bfd_get_section_by_name (abfd
, alc
);
2816 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2818 /* This is a .stab section. */
2819 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2820 elf_section_data (s
)->this_hdr
.sh_entsize
2821 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2828 case SHT_GNU_verneed
:
2829 case SHT_GNU_verdef
:
2830 /* sh_link is the section header index of the string table
2831 used for the dynamic entries, or the symbol table, or the
2833 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2835 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2839 case SHT_GNU_versym
:
2840 /* sh_link is the section header index of the symbol table
2841 this hash table or version table is for. */
2842 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2844 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2848 d
->this_hdr
.sh_link
= t
->symtab_section
;
2852 for (secn
= 1; secn
< section_number
; ++secn
)
2853 if (i_shdrp
[secn
] == NULL
)
2854 i_shdrp
[secn
] = i_shdrp
[0];
2856 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2857 i_shdrp
[secn
]->sh_name
);
2861 /* Map symbol from it's internal number to the external number, moving
2862 all local symbols to be at the head of the list. */
2865 sym_is_global (abfd
, sym
)
2869 /* If the backend has a special mapping, use it. */
2870 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2871 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2874 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2875 || bfd_is_und_section (bfd_get_section (sym
))
2876 || bfd_is_com_section (bfd_get_section (sym
)));
2880 elf_map_symbols (abfd
)
2883 unsigned int symcount
= bfd_get_symcount (abfd
);
2884 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2885 asymbol
**sect_syms
;
2886 unsigned int num_locals
= 0;
2887 unsigned int num_globals
= 0;
2888 unsigned int num_locals2
= 0;
2889 unsigned int num_globals2
= 0;
2897 fprintf (stderr
, "elf_map_symbols\n");
2901 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2903 if (max_index
< asect
->index
)
2904 max_index
= asect
->index
;
2908 amt
= max_index
* sizeof (asymbol
*);
2909 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, amt
);
2910 if (sect_syms
== NULL
)
2912 elf_section_syms (abfd
) = sect_syms
;
2913 elf_num_section_syms (abfd
) = max_index
;
2915 /* Init sect_syms entries for any section symbols we have already
2916 decided to output. */
2917 for (idx
= 0; idx
< symcount
; idx
++)
2919 asymbol
*sym
= syms
[idx
];
2921 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2928 if (sec
->owner
!= NULL
)
2930 if (sec
->owner
!= abfd
)
2932 if (sec
->output_offset
!= 0)
2935 sec
= sec
->output_section
;
2937 /* Empty sections in the input files may have had a
2938 section symbol created for them. (See the comment
2939 near the end of _bfd_generic_link_output_symbols in
2940 linker.c). If the linker script discards such
2941 sections then we will reach this point. Since we know
2942 that we cannot avoid this case, we detect it and skip
2943 the abort and the assignment to the sect_syms array.
2944 To reproduce this particular case try running the
2945 linker testsuite test ld-scripts/weak.exp for an ELF
2946 port that uses the generic linker. */
2947 if (sec
->owner
== NULL
)
2950 BFD_ASSERT (sec
->owner
== abfd
);
2952 sect_syms
[sec
->index
] = syms
[idx
];
2957 /* Classify all of the symbols. */
2958 for (idx
= 0; idx
< symcount
; idx
++)
2960 if (!sym_is_global (abfd
, syms
[idx
]))
2966 /* We will be adding a section symbol for each BFD section. Most normal
2967 sections will already have a section symbol in outsymbols, but
2968 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2969 at least in that case. */
2970 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2972 if (sect_syms
[asect
->index
] == NULL
)
2974 if (!sym_is_global (abfd
, asect
->symbol
))
2981 /* Now sort the symbols so the local symbols are first. */
2982 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
2983 new_syms
= (asymbol
**) bfd_alloc (abfd
, amt
);
2985 if (new_syms
== NULL
)
2988 for (idx
= 0; idx
< symcount
; idx
++)
2990 asymbol
*sym
= syms
[idx
];
2993 if (!sym_is_global (abfd
, sym
))
2996 i
= num_locals
+ num_globals2
++;
2998 sym
->udata
.i
= i
+ 1;
3000 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3002 if (sect_syms
[asect
->index
] == NULL
)
3004 asymbol
*sym
= asect
->symbol
;
3007 sect_syms
[asect
->index
] = sym
;
3008 if (!sym_is_global (abfd
, sym
))
3011 i
= num_locals
+ num_globals2
++;
3013 sym
->udata
.i
= i
+ 1;
3017 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3019 elf_num_locals (abfd
) = num_locals
;
3020 elf_num_globals (abfd
) = num_globals
;
3024 /* Align to the maximum file alignment that could be required for any
3025 ELF data structure. */
3027 static INLINE file_ptr align_file_position
3028 PARAMS ((file_ptr
, int));
3029 static INLINE file_ptr
3030 align_file_position (off
, align
)
3034 return (off
+ align
- 1) & ~(align
- 1);
3037 /* Assign a file position to a section, optionally aligning to the
3038 required section alignment. */
3041 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
3042 Elf_Internal_Shdr
*i_shdrp
;
3050 al
= i_shdrp
->sh_addralign
;
3052 offset
= BFD_ALIGN (offset
, al
);
3054 i_shdrp
->sh_offset
= offset
;
3055 if (i_shdrp
->bfd_section
!= NULL
)
3056 i_shdrp
->bfd_section
->filepos
= offset
;
3057 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3058 offset
+= i_shdrp
->sh_size
;
3062 /* Compute the file positions we are going to put the sections at, and
3063 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3064 is not NULL, this is being called by the ELF backend linker. */
3067 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
3069 struct bfd_link_info
*link_info
;
3071 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3073 struct bfd_strtab_hash
*strtab
;
3074 Elf_Internal_Shdr
*shstrtab_hdr
;
3076 if (abfd
->output_has_begun
)
3079 /* Do any elf backend specific processing first. */
3080 if (bed
->elf_backend_begin_write_processing
)
3081 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3083 if (! prep_headers (abfd
))
3086 /* Post process the headers if necessary. */
3087 if (bed
->elf_backend_post_process_headers
)
3088 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3091 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3095 if (!assign_section_numbers (abfd
))
3098 /* The backend linker builds symbol table information itself. */
3099 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3101 /* Non-zero if doing a relocatable link. */
3102 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3104 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3108 if (link_info
== NULL
)
3110 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3115 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3116 /* sh_name was set in prep_headers. */
3117 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3118 shstrtab_hdr
->sh_flags
= 0;
3119 shstrtab_hdr
->sh_addr
= 0;
3120 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3121 shstrtab_hdr
->sh_entsize
= 0;
3122 shstrtab_hdr
->sh_link
= 0;
3123 shstrtab_hdr
->sh_info
= 0;
3124 /* sh_offset is set in assign_file_positions_except_relocs. */
3125 shstrtab_hdr
->sh_addralign
= 1;
3127 if (!assign_file_positions_except_relocs (abfd
))
3130 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3133 Elf_Internal_Shdr
*hdr
;
3135 off
= elf_tdata (abfd
)->next_file_pos
;
3137 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3138 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3140 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3141 if (hdr
->sh_size
!= 0)
3142 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3144 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3145 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3147 elf_tdata (abfd
)->next_file_pos
= off
;
3149 /* Now that we know where the .strtab section goes, write it
3151 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3152 || ! _bfd_stringtab_emit (abfd
, strtab
))
3154 _bfd_stringtab_free (strtab
);
3157 abfd
->output_has_begun
= TRUE
;
3162 /* Create a mapping from a set of sections to a program segment. */
3164 static INLINE
struct elf_segment_map
*
3165 make_mapping (abfd
, sections
, from
, to
, phdr
)
3167 asection
**sections
;
3172 struct elf_segment_map
*m
;
3177 amt
= sizeof (struct elf_segment_map
);
3178 amt
+= (to
- from
- 1) * sizeof (asection
*);
3179 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3183 m
->p_type
= PT_LOAD
;
3184 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3185 m
->sections
[i
- from
] = *hdrpp
;
3186 m
->count
= to
- from
;
3188 if (from
== 0 && phdr
)
3190 /* Include the headers in the first PT_LOAD segment. */
3191 m
->includes_filehdr
= 1;
3192 m
->includes_phdrs
= 1;
3198 /* Set up a mapping from BFD sections to program segments. */
3201 map_sections_to_segments (abfd
)
3204 asection
**sections
= NULL
;
3208 struct elf_segment_map
*mfirst
;
3209 struct elf_segment_map
**pm
;
3210 struct elf_segment_map
*m
;
3212 unsigned int phdr_index
;
3213 bfd_vma maxpagesize
;
3215 bfd_boolean phdr_in_segment
= TRUE
;
3216 bfd_boolean writable
;
3218 asection
*first_tls
= NULL
;
3219 asection
*dynsec
, *eh_frame_hdr
;
3222 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3225 if (bfd_count_sections (abfd
) == 0)
3228 /* Select the allocated sections, and sort them. */
3230 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3231 sections
= (asection
**) bfd_malloc (amt
);
3232 if (sections
== NULL
)
3236 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3238 if ((s
->flags
& SEC_ALLOC
) != 0)
3244 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3247 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3249 /* Build the mapping. */
3254 /* If we have a .interp section, then create a PT_PHDR segment for
3255 the program headers and a PT_INTERP segment for the .interp
3257 s
= bfd_get_section_by_name (abfd
, ".interp");
3258 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3260 amt
= sizeof (struct elf_segment_map
);
3261 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3265 m
->p_type
= PT_PHDR
;
3266 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3267 m
->p_flags
= PF_R
| PF_X
;
3268 m
->p_flags_valid
= 1;
3269 m
->includes_phdrs
= 1;
3274 amt
= sizeof (struct elf_segment_map
);
3275 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3279 m
->p_type
= PT_INTERP
;
3287 /* Look through the sections. We put sections in the same program
3288 segment when the start of the second section can be placed within
3289 a few bytes of the end of the first section. */
3292 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3294 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3296 && (dynsec
->flags
& SEC_LOAD
) == 0)
3299 /* Deal with -Ttext or something similar such that the first section
3300 is not adjacent to the program headers. This is an
3301 approximation, since at this point we don't know exactly how many
3302 program headers we will need. */
3305 bfd_size_type phdr_size
;
3307 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3309 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3310 if ((abfd
->flags
& D_PAGED
) == 0
3311 || sections
[0]->lma
< phdr_size
3312 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3313 phdr_in_segment
= FALSE
;
3316 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3319 bfd_boolean new_segment
;
3323 /* See if this section and the last one will fit in the same
3326 if (last_hdr
== NULL
)
3328 /* If we don't have a segment yet, then we don't need a new
3329 one (we build the last one after this loop). */
3330 new_segment
= FALSE
;
3332 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3334 /* If this section has a different relation between the
3335 virtual address and the load address, then we need a new
3339 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3340 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3342 /* If putting this section in this segment would force us to
3343 skip a page in the segment, then we need a new segment. */
3346 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
3347 && (hdr
->flags
& SEC_LOAD
) != 0)
3349 /* We don't want to put a loadable section after a
3350 nonloadable section in the same segment. */
3353 else if ((abfd
->flags
& D_PAGED
) == 0)
3355 /* If the file is not demand paged, which means that we
3356 don't require the sections to be correctly aligned in the
3357 file, then there is no other reason for a new segment. */
3358 new_segment
= FALSE
;
3361 && (hdr
->flags
& SEC_READONLY
) == 0
3362 && (((last_hdr
->lma
+ last_hdr
->_raw_size
- 1)
3363 & ~(maxpagesize
- 1))
3364 != (hdr
->lma
& ~(maxpagesize
- 1))))
3366 /* We don't want to put a writable section in a read only
3367 segment, unless they are on the same page in memory
3368 anyhow. We already know that the last section does not
3369 bring us past the current section on the page, so the
3370 only case in which the new section is not on the same
3371 page as the previous section is when the previous section
3372 ends precisely on a page boundary. */
3377 /* Otherwise, we can use the same segment. */
3378 new_segment
= FALSE
;
3383 if ((hdr
->flags
& SEC_READONLY
) == 0)
3389 /* We need a new program segment. We must create a new program
3390 header holding all the sections from phdr_index until hdr. */
3392 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3399 if ((hdr
->flags
& SEC_READONLY
) == 0)
3406 phdr_in_segment
= FALSE
;
3409 /* Create a final PT_LOAD program segment. */
3410 if (last_hdr
!= NULL
)
3412 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3420 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3423 amt
= sizeof (struct elf_segment_map
);
3424 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3428 m
->p_type
= PT_DYNAMIC
;
3430 m
->sections
[0] = dynsec
;
3436 /* For each loadable .note section, add a PT_NOTE segment. We don't
3437 use bfd_get_section_by_name, because if we link together
3438 nonloadable .note sections and loadable .note sections, we will
3439 generate two .note sections in the output file. FIXME: Using
3440 names for section types is bogus anyhow. */
3441 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3443 if ((s
->flags
& SEC_LOAD
) != 0
3444 && strncmp (s
->name
, ".note", 5) == 0)
3446 amt
= sizeof (struct elf_segment_map
);
3447 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3451 m
->p_type
= PT_NOTE
;
3458 if (s
->flags
& SEC_THREAD_LOCAL
)
3466 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3471 amt
= sizeof (struct elf_segment_map
);
3472 amt
+= (tls_count
- 1) * sizeof (asection
*);
3473 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3478 m
->count
= tls_count
;
3479 /* Mandated PF_R. */
3481 m
->p_flags_valid
= 1;
3482 for (i
= 0; i
< tls_count
; ++i
)
3484 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3485 m
->sections
[i
] = first_tls
;
3486 first_tls
= first_tls
->next
;
3493 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3495 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3496 if (eh_frame_hdr
!= NULL
3497 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3499 amt
= sizeof (struct elf_segment_map
);
3500 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3504 m
->p_type
= PT_GNU_EH_FRAME
;
3506 m
->sections
[0] = eh_frame_hdr
->output_section
;
3515 elf_tdata (abfd
)->segment_map
= mfirst
;
3519 if (sections
!= NULL
)
3524 /* Sort sections by address. */
3527 elf_sort_sections (arg1
, arg2
)
3531 const asection
*sec1
= *(const asection
**) arg1
;
3532 const asection
*sec2
= *(const asection
**) arg2
;
3533 bfd_size_type size1
, size2
;
3535 /* Sort by LMA first, since this is the address used to
3536 place the section into a segment. */
3537 if (sec1
->lma
< sec2
->lma
)
3539 else if (sec1
->lma
> sec2
->lma
)
3542 /* Then sort by VMA. Normally the LMA and the VMA will be
3543 the same, and this will do nothing. */
3544 if (sec1
->vma
< sec2
->vma
)
3546 else if (sec1
->vma
> sec2
->vma
)
3549 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3551 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3557 /* If the indicies are the same, do not return 0
3558 here, but continue to try the next comparison. */
3559 if (sec1
->target_index
- sec2
->target_index
!= 0)
3560 return sec1
->target_index
- sec2
->target_index
;
3565 else if (TOEND (sec2
))
3570 /* Sort by size, to put zero sized sections
3571 before others at the same address. */
3573 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->_raw_size
: 0;
3574 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->_raw_size
: 0;
3581 return sec1
->target_index
- sec2
->target_index
;
3584 /* Assign file positions to the sections based on the mapping from
3585 sections to segments. This function also sets up some fields in
3586 the file header, and writes out the program headers. */
3589 assign_file_positions_for_segments (abfd
)
3592 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3594 struct elf_segment_map
*m
;
3596 Elf_Internal_Phdr
*phdrs
;
3598 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3599 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3600 Elf_Internal_Phdr
*p
;
3603 if (elf_tdata (abfd
)->segment_map
== NULL
)
3605 if (! map_sections_to_segments (abfd
))
3610 /* The placement algorithm assumes that non allocated sections are
3611 not in PT_LOAD segments. We ensure this here by removing such
3612 sections from the segment map. */
3613 for (m
= elf_tdata (abfd
)->segment_map
;
3617 unsigned int new_count
;
3620 if (m
->p_type
!= PT_LOAD
)
3624 for (i
= 0; i
< m
->count
; i
++)
3626 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3629 m
->sections
[new_count
] = m
->sections
[i
];
3635 if (new_count
!= m
->count
)
3636 m
->count
= new_count
;
3640 if (bed
->elf_backend_modify_segment_map
)
3642 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
3647 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3650 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3651 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3652 elf_elfheader (abfd
)->e_phnum
= count
;
3657 /* If we already counted the number of program segments, make sure
3658 that we allocated enough space. This happens when SIZEOF_HEADERS
3659 is used in a linker script. */
3660 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3661 if (alloc
!= 0 && count
> alloc
)
3663 ((*_bfd_error_handler
)
3664 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3665 bfd_get_filename (abfd
), alloc
, count
));
3666 bfd_set_error (bfd_error_bad_value
);
3673 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3674 phdrs
= (Elf_Internal_Phdr
*) bfd_alloc (abfd
, amt
);
3678 off
= bed
->s
->sizeof_ehdr
;
3679 off
+= alloc
* bed
->s
->sizeof_phdr
;
3686 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3693 /* If elf_segment_map is not from map_sections_to_segments, the
3694 sections may not be correctly ordered. NOTE: sorting should
3695 not be done to the PT_NOTE section of a corefile, which may
3696 contain several pseudo-sections artificially created by bfd.
3697 Sorting these pseudo-sections breaks things badly. */
3699 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3700 && m
->p_type
== PT_NOTE
))
3701 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3704 p
->p_type
= m
->p_type
;
3705 p
->p_flags
= m
->p_flags
;
3707 if (p
->p_type
== PT_LOAD
3709 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3711 if ((abfd
->flags
& D_PAGED
) != 0)
3712 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
3715 bfd_size_type align
;
3718 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3720 bfd_size_type secalign
;
3722 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3723 if (secalign
> align
)
3727 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
3734 p
->p_vaddr
= m
->sections
[0]->vma
;
3736 if (m
->p_paddr_valid
)
3737 p
->p_paddr
= m
->p_paddr
;
3738 else if (m
->count
== 0)
3741 p
->p_paddr
= m
->sections
[0]->lma
;
3743 if (p
->p_type
== PT_LOAD
3744 && (abfd
->flags
& D_PAGED
) != 0)
3745 p
->p_align
= bed
->maxpagesize
;
3746 else if (m
->count
== 0)
3747 p
->p_align
= bed
->s
->file_align
;
3755 if (m
->includes_filehdr
)
3757 if (! m
->p_flags_valid
)
3760 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3761 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3764 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3766 if (p
->p_vaddr
< (bfd_vma
) off
)
3768 (*_bfd_error_handler
)
3769 (_("%s: Not enough room for program headers, try linking with -N"),
3770 bfd_get_filename (abfd
));
3771 bfd_set_error (bfd_error_bad_value
);
3776 if (! m
->p_paddr_valid
)
3779 if (p
->p_type
== PT_LOAD
)
3781 filehdr_vaddr
= p
->p_vaddr
;
3782 filehdr_paddr
= p
->p_paddr
;
3786 if (m
->includes_phdrs
)
3788 if (! m
->p_flags_valid
)
3791 if (m
->includes_filehdr
)
3793 if (p
->p_type
== PT_LOAD
)
3795 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3796 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
3801 p
->p_offset
= bed
->s
->sizeof_ehdr
;
3805 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3806 p
->p_vaddr
-= off
- p
->p_offset
;
3807 if (! m
->p_paddr_valid
)
3808 p
->p_paddr
-= off
- p
->p_offset
;
3811 if (p
->p_type
== PT_LOAD
)
3813 phdrs_vaddr
= p
->p_vaddr
;
3814 phdrs_paddr
= p
->p_paddr
;
3817 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
3820 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
3821 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
3824 if (p
->p_type
== PT_LOAD
3825 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
3827 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
3833 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
3834 p
->p_filesz
+= adjust
;
3835 p
->p_memsz
+= adjust
;
3841 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3845 bfd_size_type align
;
3849 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
3851 /* The section may have artificial alignment forced by a
3852 link script. Notice this case by the gap between the
3853 cumulative phdr lma and the section's lma. */
3854 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
3856 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3858 p
->p_memsz
+= adjust
;
3859 if (p
->p_type
== PT_LOAD
3860 || (p
->p_type
== PT_NOTE
3861 && bfd_get_format (abfd
) == bfd_core
))
3866 if ((flags
& SEC_LOAD
) != 0
3867 || (flags
& SEC_THREAD_LOCAL
) != 0)
3868 p
->p_filesz
+= adjust
;
3871 if (p
->p_type
== PT_LOAD
)
3873 bfd_signed_vma adjust
;
3875 if ((flags
& SEC_LOAD
) != 0)
3877 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3881 else if ((flags
& SEC_ALLOC
) != 0)
3883 /* The section VMA must equal the file position
3884 modulo the page size. FIXME: I'm not sure if
3885 this adjustment is really necessary. We used to
3886 not have the SEC_LOAD case just above, and then
3887 this was necessary, but now I'm not sure. */
3888 if ((abfd
->flags
& D_PAGED
) != 0)
3889 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
3891 adjust
= (sec
->vma
- voff
) % align
;
3900 (* _bfd_error_handler
) (_("\
3901 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3902 bfd_section_name (abfd
, sec
),
3907 p
->p_memsz
+= adjust
;
3910 if ((flags
& SEC_LOAD
) != 0)
3911 p
->p_filesz
+= adjust
;
3916 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3917 used in a linker script we may have a section with
3918 SEC_LOAD clear but which is supposed to have
3920 if ((flags
& SEC_LOAD
) != 0
3921 || (flags
& SEC_HAS_CONTENTS
) != 0)
3922 off
+= sec
->_raw_size
;
3924 if ((flags
& SEC_ALLOC
) != 0
3925 && ((flags
& SEC_LOAD
) != 0
3926 || (flags
& SEC_THREAD_LOCAL
) == 0))
3927 voff
+= sec
->_raw_size
;
3930 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3932 /* The actual "note" segment has i == 0.
3933 This is the one that actually contains everything. */
3937 p
->p_filesz
= sec
->_raw_size
;
3938 off
+= sec
->_raw_size
;
3943 /* Fake sections -- don't need to be written. */
3946 flags
= sec
->flags
= 0;
3953 if ((sec
->flags
& SEC_LOAD
) != 0
3954 || (sec
->flags
& SEC_THREAD_LOCAL
) == 0
3955 || p
->p_type
== PT_TLS
)
3956 p
->p_memsz
+= sec
->_raw_size
;
3958 if ((flags
& SEC_LOAD
) != 0)
3959 p
->p_filesz
+= sec
->_raw_size
;
3961 if (p
->p_type
== PT_TLS
3962 && sec
->_raw_size
== 0
3963 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
3965 struct bfd_link_order
*o
;
3966 bfd_vma tbss_size
= 0;
3968 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
3969 if (tbss_size
< o
->offset
+ o
->size
)
3970 tbss_size
= o
->offset
+ o
->size
;
3972 p
->p_memsz
+= tbss_size
;
3975 if (align
> p
->p_align
3976 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3980 if (! m
->p_flags_valid
)
3983 if ((flags
& SEC_CODE
) != 0)
3985 if ((flags
& SEC_READONLY
) == 0)
3991 /* Now that we have set the section file positions, we can set up
3992 the file positions for the non PT_LOAD segments. */
3993 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3997 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3999 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4000 p
->p_offset
= m
->sections
[0]->filepos
;
4004 if (m
->includes_filehdr
)
4006 p
->p_vaddr
= filehdr_vaddr
;
4007 if (! m
->p_paddr_valid
)
4008 p
->p_paddr
= filehdr_paddr
;
4010 else if (m
->includes_phdrs
)
4012 p
->p_vaddr
= phdrs_vaddr
;
4013 if (! m
->p_paddr_valid
)
4014 p
->p_paddr
= phdrs_paddr
;
4019 /* Clear out any program headers we allocated but did not use. */
4020 for (; count
< alloc
; count
++, p
++)
4022 memset (p
, 0, sizeof *p
);
4023 p
->p_type
= PT_NULL
;
4026 elf_tdata (abfd
)->phdr
= phdrs
;
4028 elf_tdata (abfd
)->next_file_pos
= off
;
4030 /* Write out the program headers. */
4031 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4032 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4038 /* Get the size of the program header.
4040 If this is called by the linker before any of the section VMA's are set, it
4041 can't calculate the correct value for a strange memory layout. This only
4042 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4043 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4044 data segment (exclusive of .interp and .dynamic).
4046 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4047 will be two segments. */
4049 static bfd_size_type
4050 get_program_header_size (abfd
)
4055 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4057 /* We can't return a different result each time we're called. */
4058 if (elf_tdata (abfd
)->program_header_size
!= 0)
4059 return elf_tdata (abfd
)->program_header_size
;
4061 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4063 struct elf_segment_map
*m
;
4066 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4068 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4069 return elf_tdata (abfd
)->program_header_size
;
4072 /* Assume we will need exactly two PT_LOAD segments: one for text
4073 and one for data. */
4076 s
= bfd_get_section_by_name (abfd
, ".interp");
4077 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4079 /* If we have a loadable interpreter section, we need a
4080 PT_INTERP segment. In this case, assume we also need a
4081 PT_PHDR segment, although that may not be true for all
4086 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4088 /* We need a PT_DYNAMIC segment. */
4092 if (elf_tdata (abfd
)->eh_frame_hdr
)
4094 /* We need a PT_GNU_EH_FRAME segment. */
4098 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4100 if ((s
->flags
& SEC_LOAD
) != 0
4101 && strncmp (s
->name
, ".note", 5) == 0)
4103 /* We need a PT_NOTE segment. */
4108 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4110 if (s
->flags
& SEC_THREAD_LOCAL
)
4112 /* We need a PT_TLS segment. */
4118 /* Let the backend count up any program headers it might need. */
4119 if (bed
->elf_backend_additional_program_headers
)
4123 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4129 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4130 return elf_tdata (abfd
)->program_header_size
;
4133 /* Work out the file positions of all the sections. This is called by
4134 _bfd_elf_compute_section_file_positions. All the section sizes and
4135 VMAs must be known before this is called.
4137 We do not consider reloc sections at this point, unless they form
4138 part of the loadable image. Reloc sections are assigned file
4139 positions in assign_file_positions_for_relocs, which is called by
4140 write_object_contents and final_link.
4142 We also don't set the positions of the .symtab and .strtab here. */
4145 assign_file_positions_except_relocs (abfd
)
4148 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4149 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4150 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4151 unsigned int num_sec
= elf_numsections (abfd
);
4153 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4155 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4156 && bfd_get_format (abfd
) != bfd_core
)
4158 Elf_Internal_Shdr
**hdrpp
;
4161 /* Start after the ELF header. */
4162 off
= i_ehdrp
->e_ehsize
;
4164 /* We are not creating an executable, which means that we are
4165 not creating a program header, and that the actual order of
4166 the sections in the file is unimportant. */
4167 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4169 Elf_Internal_Shdr
*hdr
;
4172 if (hdr
->sh_type
== SHT_REL
4173 || hdr
->sh_type
== SHT_RELA
4174 || i
== tdata
->symtab_section
4175 || i
== tdata
->symtab_shndx_section
4176 || i
== tdata
->strtab_section
)
4178 hdr
->sh_offset
= -1;
4181 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4183 if (i
== SHN_LORESERVE
- 1)
4185 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4186 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4193 Elf_Internal_Shdr
**hdrpp
;
4195 /* Assign file positions for the loaded sections based on the
4196 assignment of sections to segments. */
4197 if (! assign_file_positions_for_segments (abfd
))
4200 /* Assign file positions for the other sections. */
4202 off
= elf_tdata (abfd
)->next_file_pos
;
4203 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4205 Elf_Internal_Shdr
*hdr
;
4208 if (hdr
->bfd_section
!= NULL
4209 && hdr
->bfd_section
->filepos
!= 0)
4210 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4211 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4213 ((*_bfd_error_handler
)
4214 (_("%s: warning: allocated section `%s' not in segment"),
4215 bfd_get_filename (abfd
),
4216 (hdr
->bfd_section
== NULL
4218 : hdr
->bfd_section
->name
)));
4219 if ((abfd
->flags
& D_PAGED
) != 0)
4220 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
4222 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
4223 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4226 else if (hdr
->sh_type
== SHT_REL
4227 || hdr
->sh_type
== SHT_RELA
4228 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4229 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4230 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4231 hdr
->sh_offset
= -1;
4233 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4235 if (i
== SHN_LORESERVE
- 1)
4237 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4238 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4243 /* Place the section headers. */
4244 off
= align_file_position (off
, bed
->s
->file_align
);
4245 i_ehdrp
->e_shoff
= off
;
4246 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4248 elf_tdata (abfd
)->next_file_pos
= off
;
4257 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4258 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4259 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4260 struct elf_strtab_hash
*shstrtab
;
4261 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4263 i_ehdrp
= elf_elfheader (abfd
);
4264 i_shdrp
= elf_elfsections (abfd
);
4266 shstrtab
= _bfd_elf_strtab_init ();
4267 if (shstrtab
== NULL
)
4270 elf_shstrtab (abfd
) = shstrtab
;
4272 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4273 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4274 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4275 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4277 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4278 i_ehdrp
->e_ident
[EI_DATA
] =
4279 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4280 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4282 if ((abfd
->flags
& DYNAMIC
) != 0)
4283 i_ehdrp
->e_type
= ET_DYN
;
4284 else if ((abfd
->flags
& EXEC_P
) != 0)
4285 i_ehdrp
->e_type
= ET_EXEC
;
4286 else if (bfd_get_format (abfd
) == bfd_core
)
4287 i_ehdrp
->e_type
= ET_CORE
;
4289 i_ehdrp
->e_type
= ET_REL
;
4291 switch (bfd_get_arch (abfd
))
4293 case bfd_arch_unknown
:
4294 i_ehdrp
->e_machine
= EM_NONE
;
4297 /* There used to be a long list of cases here, each one setting
4298 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4299 in the corresponding bfd definition. To avoid duplication,
4300 the switch was removed. Machines that need special handling
4301 can generally do it in elf_backend_final_write_processing(),
4302 unless they need the information earlier than the final write.
4303 Such need can generally be supplied by replacing the tests for
4304 e_machine with the conditions used to determine it. */
4306 if (get_elf_backend_data (abfd
) != NULL
)
4307 i_ehdrp
->e_machine
= get_elf_backend_data (abfd
)->elf_machine_code
;
4309 i_ehdrp
->e_machine
= EM_NONE
;
4312 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4313 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4315 /* No program header, for now. */
4316 i_ehdrp
->e_phoff
= 0;
4317 i_ehdrp
->e_phentsize
= 0;
4318 i_ehdrp
->e_phnum
= 0;
4320 /* Each bfd section is section header entry. */
4321 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4322 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4324 /* If we're building an executable, we'll need a program header table. */
4325 if (abfd
->flags
& EXEC_P
)
4327 /* It all happens later. */
4329 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4331 /* elf_build_phdrs() returns a (NULL-terminated) array of
4332 Elf_Internal_Phdrs. */
4333 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4334 i_ehdrp
->e_phoff
= outbase
;
4335 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4340 i_ehdrp
->e_phentsize
= 0;
4342 i_ehdrp
->e_phoff
= 0;
4345 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4346 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4347 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4348 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4349 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4350 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4351 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4352 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4353 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4359 /* Assign file positions for all the reloc sections which are not part
4360 of the loadable file image. */
4363 _bfd_elf_assign_file_positions_for_relocs (abfd
)
4367 unsigned int i
, num_sec
;
4368 Elf_Internal_Shdr
**shdrpp
;
4370 off
= elf_tdata (abfd
)->next_file_pos
;
4372 num_sec
= elf_numsections (abfd
);
4373 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4375 Elf_Internal_Shdr
*shdrp
;
4378 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4379 && shdrp
->sh_offset
== -1)
4380 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4383 elf_tdata (abfd
)->next_file_pos
= off
;
4387 _bfd_elf_write_object_contents (abfd
)
4390 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4391 Elf_Internal_Ehdr
*i_ehdrp
;
4392 Elf_Internal_Shdr
**i_shdrp
;
4394 unsigned int count
, num_sec
;
4396 if (! abfd
->output_has_begun
4397 && ! _bfd_elf_compute_section_file_positions
4398 (abfd
, (struct bfd_link_info
*) NULL
))
4401 i_shdrp
= elf_elfsections (abfd
);
4402 i_ehdrp
= elf_elfheader (abfd
);
4405 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4409 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4411 /* After writing the headers, we need to write the sections too... */
4412 num_sec
= elf_numsections (abfd
);
4413 for (count
= 1; count
< num_sec
; count
++)
4415 if (bed
->elf_backend_section_processing
)
4416 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4417 if (i_shdrp
[count
]->contents
)
4419 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4421 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4422 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4425 if (count
== SHN_LORESERVE
- 1)
4426 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4429 /* Write out the section header names. */
4430 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4431 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4434 if (bed
->elf_backend_final_write_processing
)
4435 (*bed
->elf_backend_final_write_processing
) (abfd
,
4436 elf_tdata (abfd
)->linker
);
4438 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4442 _bfd_elf_write_corefile_contents (abfd
)
4445 /* Hopefully this can be done just like an object file. */
4446 return _bfd_elf_write_object_contents (abfd
);
4449 /* Given a section, search the header to find them. */
4452 _bfd_elf_section_from_bfd_section (abfd
, asect
)
4456 struct elf_backend_data
*bed
;
4459 if (elf_section_data (asect
) != NULL
4460 && elf_section_data (asect
)->this_idx
!= 0)
4461 return elf_section_data (asect
)->this_idx
;
4463 if (bfd_is_abs_section (asect
))
4465 else if (bfd_is_com_section (asect
))
4467 else if (bfd_is_und_section (asect
))
4471 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4472 int maxindex
= elf_numsections (abfd
);
4474 for (index
= 1; index
< maxindex
; index
++)
4476 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4478 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4484 bed
= get_elf_backend_data (abfd
);
4485 if (bed
->elf_backend_section_from_bfd_section
)
4489 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4494 bfd_set_error (bfd_error_nonrepresentable_section
);
4499 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4503 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
4505 asymbol
**asym_ptr_ptr
;
4507 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4509 flagword flags
= asym_ptr
->flags
;
4511 /* When gas creates relocations against local labels, it creates its
4512 own symbol for the section, but does put the symbol into the
4513 symbol chain, so udata is 0. When the linker is generating
4514 relocatable output, this section symbol may be for one of the
4515 input sections rather than the output section. */
4516 if (asym_ptr
->udata
.i
== 0
4517 && (flags
& BSF_SECTION_SYM
)
4518 && asym_ptr
->section
)
4522 if (asym_ptr
->section
->output_section
!= NULL
)
4523 indx
= asym_ptr
->section
->output_section
->index
;
4525 indx
= asym_ptr
->section
->index
;
4526 if (indx
< elf_num_section_syms (abfd
)
4527 && elf_section_syms (abfd
)[indx
] != NULL
)
4528 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4531 idx
= asym_ptr
->udata
.i
;
4535 /* This case can occur when using --strip-symbol on a symbol
4536 which is used in a relocation entry. */
4537 (*_bfd_error_handler
)
4538 (_("%s: symbol `%s' required but not present"),
4539 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4540 bfd_set_error (bfd_error_no_symbols
);
4547 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4548 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4549 elf_symbol_flags (flags
));
4557 /* Copy private BFD data. This copies any program header information. */
4560 copy_private_bfd_data (ibfd
, obfd
)
4564 Elf_Internal_Ehdr
*iehdr
;
4565 struct elf_segment_map
*map
;
4566 struct elf_segment_map
*map_first
;
4567 struct elf_segment_map
**pointer_to_map
;
4568 Elf_Internal_Phdr
*segment
;
4571 unsigned int num_segments
;
4572 bfd_boolean phdr_included
= FALSE
;
4573 bfd_vma maxpagesize
;
4574 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4575 unsigned int phdr_adjust_num
= 0;
4576 struct elf_backend_data
*bed
;
4578 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4579 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4582 if (elf_tdata (ibfd
)->phdr
== NULL
)
4585 bed
= get_elf_backend_data (ibfd
);
4586 iehdr
= elf_elfheader (ibfd
);
4589 pointer_to_map
= &map_first
;
4591 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4592 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4594 /* Returns the end address of the segment + 1. */
4595 #define SEGMENT_END(segment, start) \
4596 (start + (segment->p_memsz > segment->p_filesz \
4597 ? segment->p_memsz : segment->p_filesz))
4599 #define SECTION_SIZE(section, segment) \
4600 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4601 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4602 ? section->_raw_size : 0)
4604 /* Returns TRUE if the given section is contained within
4605 the given segment. VMA addresses are compared. */
4606 #define IS_CONTAINED_BY_VMA(section, segment) \
4607 (section->vma >= segment->p_vaddr \
4608 && (section->vma + SECTION_SIZE (section, segment) \
4609 <= (SEGMENT_END (segment, segment->p_vaddr))))
4611 /* Returns TRUE if the given section is contained within
4612 the given segment. LMA addresses are compared. */
4613 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4614 (section->lma >= base \
4615 && (section->lma + SECTION_SIZE (section, segment) \
4616 <= SEGMENT_END (segment, base)))
4618 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4619 #define IS_COREFILE_NOTE(p, s) \
4620 (p->p_type == PT_NOTE \
4621 && bfd_get_format (ibfd) == bfd_core \
4622 && s->vma == 0 && s->lma == 0 \
4623 && (bfd_vma) s->filepos >= p->p_offset \
4624 && ((bfd_vma) s->filepos + s->_raw_size \
4625 <= p->p_offset + p->p_filesz))
4627 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4628 linker, which generates a PT_INTERP section with p_vaddr and
4629 p_memsz set to 0. */
4630 #define IS_SOLARIS_PT_INTERP(p, s) \
4632 && p->p_paddr == 0 \
4633 && p->p_memsz == 0 \
4634 && p->p_filesz > 0 \
4635 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4636 && s->_raw_size > 0 \
4637 && (bfd_vma) s->filepos >= p->p_offset \
4638 && ((bfd_vma) s->filepos + s->_raw_size \
4639 <= p->p_offset + p->p_filesz))
4641 /* Decide if the given section should be included in the given segment.
4642 A section will be included if:
4643 1. It is within the address space of the segment -- we use the LMA
4644 if that is set for the segment and the VMA otherwise,
4645 2. It is an allocated segment,
4646 3. There is an output section associated with it,
4647 4. The section has not already been allocated to a previous segment.
4648 5. PT_TLS segment includes only SHF_TLS sections.
4649 6. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4650 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4651 ((((segment->p_paddr \
4652 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4653 : IS_CONTAINED_BY_VMA (section, segment)) \
4654 && (section->flags & SEC_ALLOC) != 0) \
4655 || IS_COREFILE_NOTE (segment, section)) \
4656 && section->output_section != NULL \
4657 && (segment->p_type != PT_TLS \
4658 || (section->flags & SEC_THREAD_LOCAL)) \
4659 && (segment->p_type == PT_LOAD \
4660 || segment->p_type == PT_TLS \
4661 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4662 && ! section->segment_mark)
4664 /* Returns TRUE iff seg1 starts after the end of seg2. */
4665 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4666 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4668 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4669 their VMA address ranges and their LMA address ranges overlap.
4670 It is possible to have overlapping VMA ranges without overlapping LMA
4671 ranges. RedBoot images for example can have both .data and .bss mapped
4672 to the same VMA range, but with the .data section mapped to a different
4674 #define SEGMENT_OVERLAPS(seg1, seg2) \
4675 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4676 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4677 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4678 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4680 /* Initialise the segment mark field. */
4681 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4682 section
->segment_mark
= FALSE
;
4684 /* Scan through the segments specified in the program header
4685 of the input BFD. For this first scan we look for overlaps
4686 in the loadable segments. These can be created by weird
4687 parameters to objcopy. Also, fix some solaris weirdness. */
4688 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4693 Elf_Internal_Phdr
*segment2
;
4695 if (segment
->p_type
== PT_INTERP
)
4696 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4697 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4699 /* Mininal change so that the normal section to segment
4700 assigment code will work. */
4701 segment
->p_vaddr
= section
->vma
;
4705 if (segment
->p_type
!= PT_LOAD
)
4708 /* Determine if this segment overlaps any previous segments. */
4709 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4711 bfd_signed_vma extra_length
;
4713 if (segment2
->p_type
!= PT_LOAD
4714 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4717 /* Merge the two segments together. */
4718 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4720 /* Extend SEGMENT2 to include SEGMENT and then delete
4723 SEGMENT_END (segment
, segment
->p_vaddr
)
4724 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4726 if (extra_length
> 0)
4728 segment2
->p_memsz
+= extra_length
;
4729 segment2
->p_filesz
+= extra_length
;
4732 segment
->p_type
= PT_NULL
;
4734 /* Since we have deleted P we must restart the outer loop. */
4736 segment
= elf_tdata (ibfd
)->phdr
;
4741 /* Extend SEGMENT to include SEGMENT2 and then delete
4744 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4745 - SEGMENT_END (segment
, segment
->p_vaddr
);
4747 if (extra_length
> 0)
4749 segment
->p_memsz
+= extra_length
;
4750 segment
->p_filesz
+= extra_length
;
4753 segment2
->p_type
= PT_NULL
;
4758 /* The second scan attempts to assign sections to segments. */
4759 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4763 unsigned int section_count
;
4764 asection
** sections
;
4765 asection
* output_section
;
4767 bfd_vma matching_lma
;
4768 bfd_vma suggested_lma
;
4772 if (segment
->p_type
== PT_NULL
)
4775 /* Compute how many sections might be placed into this segment. */
4776 for (section
= ibfd
->sections
, section_count
= 0;
4778 section
= section
->next
)
4779 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4782 /* Allocate a segment map big enough to contain
4783 all of the sections we have selected. */
4784 amt
= sizeof (struct elf_segment_map
);
4785 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4786 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4790 /* Initialise the fields of the segment map. Default to
4791 using the physical address of the segment in the input BFD. */
4793 map
->p_type
= segment
->p_type
;
4794 map
->p_flags
= segment
->p_flags
;
4795 map
->p_flags_valid
= 1;
4796 map
->p_paddr
= segment
->p_paddr
;
4797 map
->p_paddr_valid
= 1;
4799 /* Determine if this segment contains the ELF file header
4800 and if it contains the program headers themselves. */
4801 map
->includes_filehdr
= (segment
->p_offset
== 0
4802 && segment
->p_filesz
>= iehdr
->e_ehsize
);
4804 map
->includes_phdrs
= 0;
4806 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
4808 map
->includes_phdrs
=
4809 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
4810 && (segment
->p_offset
+ segment
->p_filesz
4811 >= ((bfd_vma
) iehdr
->e_phoff
4812 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
4814 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
4815 phdr_included
= TRUE
;
4818 if (section_count
== 0)
4820 /* Special segments, such as the PT_PHDR segment, may contain
4821 no sections, but ordinary, loadable segments should contain
4822 something. They are allowed by the ELF spec however, so only
4823 a warning is produced. */
4824 if (segment
->p_type
== PT_LOAD
)
4825 (*_bfd_error_handler
)
4826 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4827 bfd_archive_filename (ibfd
));
4830 *pointer_to_map
= map
;
4831 pointer_to_map
= &map
->next
;
4836 /* Now scan the sections in the input BFD again and attempt
4837 to add their corresponding output sections to the segment map.
4838 The problem here is how to handle an output section which has
4839 been moved (ie had its LMA changed). There are four possibilities:
4841 1. None of the sections have been moved.
4842 In this case we can continue to use the segment LMA from the
4845 2. All of the sections have been moved by the same amount.
4846 In this case we can change the segment's LMA to match the LMA
4847 of the first section.
4849 3. Some of the sections have been moved, others have not.
4850 In this case those sections which have not been moved can be
4851 placed in the current segment which will have to have its size,
4852 and possibly its LMA changed, and a new segment or segments will
4853 have to be created to contain the other sections.
4855 4. The sections have been moved, but not by the same amount.
4856 In this case we can change the segment's LMA to match the LMA
4857 of the first section and we will have to create a new segment
4858 or segments to contain the other sections.
4860 In order to save time, we allocate an array to hold the section
4861 pointers that we are interested in. As these sections get assigned
4862 to a segment, they are removed from this array. */
4864 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4865 to work around this long long bug. */
4866 amt
= section_count
* sizeof (asection
*);
4867 sections
= (asection
**) bfd_malloc (amt
);
4868 if (sections
== NULL
)
4871 /* Step One: Scan for segment vs section LMA conflicts.
4872 Also add the sections to the section array allocated above.
4873 Also add the sections to the current segment. In the common
4874 case, where the sections have not been moved, this means that
4875 we have completely filled the segment, and there is nothing
4881 for (j
= 0, section
= ibfd
->sections
;
4883 section
= section
->next
)
4885 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4887 output_section
= section
->output_section
;
4889 sections
[j
++] = section
;
4891 /* The Solaris native linker always sets p_paddr to 0.
4892 We try to catch that case here, and set it to the
4893 correct value. Note - some backends require that
4894 p_paddr be left as zero. */
4895 if (segment
->p_paddr
== 0
4896 && segment
->p_vaddr
!= 0
4897 && (! bed
->want_p_paddr_set_to_zero
)
4899 && output_section
->lma
!= 0
4900 && (output_section
->vma
== (segment
->p_vaddr
4901 + (map
->includes_filehdr
4904 + (map
->includes_phdrs
4906 * iehdr
->e_phentsize
)
4908 map
->p_paddr
= segment
->p_vaddr
;
4910 /* Match up the physical address of the segment with the
4911 LMA address of the output section. */
4912 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4913 || IS_COREFILE_NOTE (segment
, section
)
4914 || (bed
->want_p_paddr_set_to_zero
&&
4915 IS_CONTAINED_BY_VMA (output_section
, segment
))
4918 if (matching_lma
== 0)
4919 matching_lma
= output_section
->lma
;
4921 /* We assume that if the section fits within the segment
4922 then it does not overlap any other section within that
4924 map
->sections
[isec
++] = output_section
;
4926 else if (suggested_lma
== 0)
4927 suggested_lma
= output_section
->lma
;
4931 BFD_ASSERT (j
== section_count
);
4933 /* Step Two: Adjust the physical address of the current segment,
4935 if (isec
== section_count
)
4937 /* All of the sections fitted within the segment as currently
4938 specified. This is the default case. Add the segment to
4939 the list of built segments and carry on to process the next
4940 program header in the input BFD. */
4941 map
->count
= section_count
;
4942 *pointer_to_map
= map
;
4943 pointer_to_map
= &map
->next
;
4950 if (matching_lma
!= 0)
4952 /* At least one section fits inside the current segment.
4953 Keep it, but modify its physical address to match the
4954 LMA of the first section that fitted. */
4955 map
->p_paddr
= matching_lma
;
4959 /* None of the sections fitted inside the current segment.
4960 Change the current segment's physical address to match
4961 the LMA of the first section. */
4962 map
->p_paddr
= suggested_lma
;
4965 /* Offset the segment physical address from the lma
4966 to allow for space taken up by elf headers. */
4967 if (map
->includes_filehdr
)
4968 map
->p_paddr
-= iehdr
->e_ehsize
;
4970 if (map
->includes_phdrs
)
4972 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4974 /* iehdr->e_phnum is just an estimate of the number
4975 of program headers that we will need. Make a note
4976 here of the number we used and the segment we chose
4977 to hold these headers, so that we can adjust the
4978 offset when we know the correct value. */
4979 phdr_adjust_num
= iehdr
->e_phnum
;
4980 phdr_adjust_seg
= map
;
4984 /* Step Three: Loop over the sections again, this time assigning
4985 those that fit to the current segment and removing them from the
4986 sections array; but making sure not to leave large gaps. Once all
4987 possible sections have been assigned to the current segment it is
4988 added to the list of built segments and if sections still remain
4989 to be assigned, a new segment is constructed before repeating
4997 /* Fill the current segment with sections that fit. */
4998 for (j
= 0; j
< section_count
; j
++)
5000 section
= sections
[j
];
5002 if (section
== NULL
)
5005 output_section
= section
->output_section
;
5007 BFD_ASSERT (output_section
!= NULL
);
5009 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5010 || IS_COREFILE_NOTE (segment
, section
))
5012 if (map
->count
== 0)
5014 /* If the first section in a segment does not start at
5015 the beginning of the segment, then something is
5017 if (output_section
->lma
!=
5019 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5020 + (map
->includes_phdrs
5021 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5027 asection
* prev_sec
;
5029 prev_sec
= map
->sections
[map
->count
- 1];
5031 /* If the gap between the end of the previous section
5032 and the start of this section is more than
5033 maxpagesize then we need to start a new segment. */
5034 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
,
5036 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5037 || ((prev_sec
->lma
+ prev_sec
->_raw_size
)
5038 > output_section
->lma
))
5040 if (suggested_lma
== 0)
5041 suggested_lma
= output_section
->lma
;
5047 map
->sections
[map
->count
++] = output_section
;
5050 section
->segment_mark
= TRUE
;
5052 else if (suggested_lma
== 0)
5053 suggested_lma
= output_section
->lma
;
5056 BFD_ASSERT (map
->count
> 0);
5058 /* Add the current segment to the list of built segments. */
5059 *pointer_to_map
= map
;
5060 pointer_to_map
= &map
->next
;
5062 if (isec
< section_count
)
5064 /* We still have not allocated all of the sections to
5065 segments. Create a new segment here, initialise it
5066 and carry on looping. */
5067 amt
= sizeof (struct elf_segment_map
);
5068 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5069 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
5073 /* Initialise the fields of the segment map. Set the physical
5074 physical address to the LMA of the first section that has
5075 not yet been assigned. */
5077 map
->p_type
= segment
->p_type
;
5078 map
->p_flags
= segment
->p_flags
;
5079 map
->p_flags_valid
= 1;
5080 map
->p_paddr
= suggested_lma
;
5081 map
->p_paddr_valid
= 1;
5082 map
->includes_filehdr
= 0;
5083 map
->includes_phdrs
= 0;
5086 while (isec
< section_count
);
5091 /* The Solaris linker creates program headers in which all the
5092 p_paddr fields are zero. When we try to objcopy or strip such a
5093 file, we get confused. Check for this case, and if we find it
5094 reset the p_paddr_valid fields. */
5095 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5096 if (map
->p_paddr
!= 0)
5099 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5100 map
->p_paddr_valid
= 0;
5102 elf_tdata (obfd
)->segment_map
= map_first
;
5104 /* If we had to estimate the number of program headers that were
5105 going to be needed, then check our estimate now and adjust
5106 the offset if necessary. */
5107 if (phdr_adjust_seg
!= NULL
)
5111 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5114 if (count
> phdr_adjust_num
)
5115 phdr_adjust_seg
->p_paddr
5116 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5120 /* Final Step: Sort the segments into ascending order of physical
5122 if (map_first
!= NULL
)
5124 struct elf_segment_map
*prev
;
5127 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5129 /* Yes I know - its a bubble sort.... */
5130 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5132 /* Swap map and map->next. */
5133 prev
->next
= map
->next
;
5134 map
->next
= map
->next
->next
;
5135 prev
->next
->next
= map
;
5146 #undef IS_CONTAINED_BY_VMA
5147 #undef IS_CONTAINED_BY_LMA
5148 #undef IS_COREFILE_NOTE
5149 #undef IS_SOLARIS_PT_INTERP
5150 #undef INCLUDE_SECTION_IN_SEGMENT
5151 #undef SEGMENT_AFTER_SEGMENT
5152 #undef SEGMENT_OVERLAPS
5156 /* Copy private section information. This copies over the entsize
5157 field, and sometimes the info field. */
5160 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
5166 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5168 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5169 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5172 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5176 /* Only set up the segments if there are no more SEC_ALLOC
5177 sections. FIXME: This won't do the right thing if objcopy is
5178 used to remove the last SEC_ALLOC section, since objcopy
5179 won't call this routine in that case. */
5180 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
5181 if ((s
->flags
& SEC_ALLOC
) != 0)
5185 if (! copy_private_bfd_data (ibfd
, obfd
))
5190 ihdr
= &elf_section_data (isec
)->this_hdr
;
5191 ohdr
= &elf_section_data (osec
)->this_hdr
;
5193 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5195 if (ihdr
->sh_type
== SHT_SYMTAB
5196 || ihdr
->sh_type
== SHT_DYNSYM
5197 || ihdr
->sh_type
== SHT_GNU_verneed
5198 || ihdr
->sh_type
== SHT_GNU_verdef
)
5199 ohdr
->sh_info
= ihdr
->sh_info
;
5201 /* Set things up for objcopy. The output SHT_GROUP section will
5202 have its elf_next_in_group pointing back to the input group
5204 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5205 elf_group_name (osec
) = elf_group_name (isec
);
5207 osec
->use_rela_p
= isec
->use_rela_p
;
5212 /* Copy private symbol information. If this symbol is in a section
5213 which we did not map into a BFD section, try to map the section
5214 index correctly. We use special macro definitions for the mapped
5215 section indices; these definitions are interpreted by the
5216 swap_out_syms function. */
5218 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5219 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5220 #define MAP_STRTAB (SHN_HIOS + 3)
5221 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5222 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5225 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
5231 elf_symbol_type
*isym
, *osym
;
5233 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5234 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5237 isym
= elf_symbol_from (ibfd
, isymarg
);
5238 osym
= elf_symbol_from (obfd
, osymarg
);
5242 && bfd_is_abs_section (isym
->symbol
.section
))
5246 shndx
= isym
->internal_elf_sym
.st_shndx
;
5247 if (shndx
== elf_onesymtab (ibfd
))
5248 shndx
= MAP_ONESYMTAB
;
5249 else if (shndx
== elf_dynsymtab (ibfd
))
5250 shndx
= MAP_DYNSYMTAB
;
5251 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5253 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5254 shndx
= MAP_SHSTRTAB
;
5255 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5256 shndx
= MAP_SYM_SHNDX
;
5257 osym
->internal_elf_sym
.st_shndx
= shndx
;
5263 /* Swap out the symbols. */
5266 swap_out_syms (abfd
, sttp
, relocatable_p
)
5268 struct bfd_strtab_hash
**sttp
;
5271 struct elf_backend_data
*bed
;
5274 struct bfd_strtab_hash
*stt
;
5275 Elf_Internal_Shdr
*symtab_hdr
;
5276 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5277 Elf_Internal_Shdr
*symstrtab_hdr
;
5278 char *outbound_syms
;
5279 char *outbound_shndx
;
5283 if (!elf_map_symbols (abfd
))
5286 /* Dump out the symtabs. */
5287 stt
= _bfd_elf_stringtab_init ();
5291 bed
= get_elf_backend_data (abfd
);
5292 symcount
= bfd_get_symcount (abfd
);
5293 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5294 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5295 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5296 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5297 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5298 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
5300 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5301 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5303 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5304 outbound_syms
= bfd_alloc (abfd
, amt
);
5305 if (outbound_syms
== NULL
)
5307 symtab_hdr
->contents
= (PTR
) outbound_syms
;
5309 outbound_shndx
= NULL
;
5310 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5311 if (symtab_shndx_hdr
->sh_name
!= 0)
5313 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5314 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5315 if (outbound_shndx
== NULL
)
5317 symtab_shndx_hdr
->contents
= outbound_shndx
;
5318 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5319 symtab_shndx_hdr
->sh_size
= amt
;
5320 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5321 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5324 /* Now generate the data (for "contents"). */
5326 /* Fill in zeroth symbol and swap it out. */
5327 Elf_Internal_Sym sym
;
5333 sym
.st_shndx
= SHN_UNDEF
;
5334 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5335 outbound_syms
+= bed
->s
->sizeof_sym
;
5336 if (outbound_shndx
!= NULL
)
5337 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5340 syms
= bfd_get_outsymbols (abfd
);
5341 for (idx
= 0; idx
< symcount
; idx
++)
5343 Elf_Internal_Sym sym
;
5344 bfd_vma value
= syms
[idx
]->value
;
5345 elf_symbol_type
*type_ptr
;
5346 flagword flags
= syms
[idx
]->flags
;
5349 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5351 /* Local section symbols have no name. */
5356 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5359 if (sym
.st_name
== (unsigned long) -1)
5363 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5365 if ((flags
& BSF_SECTION_SYM
) == 0
5366 && bfd_is_com_section (syms
[idx
]->section
))
5368 /* ELF common symbols put the alignment into the `value' field,
5369 and the size into the `size' field. This is backwards from
5370 how BFD handles it, so reverse it here. */
5371 sym
.st_size
= value
;
5372 if (type_ptr
== NULL
5373 || type_ptr
->internal_elf_sym
.st_value
== 0)
5374 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5376 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5377 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5378 (abfd
, syms
[idx
]->section
);
5382 asection
*sec
= syms
[idx
]->section
;
5385 if (sec
->output_section
)
5387 value
+= sec
->output_offset
;
5388 sec
= sec
->output_section
;
5391 /* Don't add in the section vma for relocatable output. */
5392 if (! relocatable_p
)
5394 sym
.st_value
= value
;
5395 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5397 if (bfd_is_abs_section (sec
)
5399 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5401 /* This symbol is in a real ELF section which we did
5402 not create as a BFD section. Undo the mapping done
5403 by copy_private_symbol_data. */
5404 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5408 shndx
= elf_onesymtab (abfd
);
5411 shndx
= elf_dynsymtab (abfd
);
5414 shndx
= elf_tdata (abfd
)->strtab_section
;
5417 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5420 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5428 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5434 /* Writing this would be a hell of a lot easier if
5435 we had some decent documentation on bfd, and
5436 knew what to expect of the library, and what to
5437 demand of applications. For example, it
5438 appears that `objcopy' might not set the
5439 section of a symbol to be a section that is
5440 actually in the output file. */
5441 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5444 _bfd_error_handler (_("\
5445 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5446 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5448 bfd_set_error (bfd_error_invalid_operation
);
5452 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5453 BFD_ASSERT (shndx
!= -1);
5457 sym
.st_shndx
= shndx
;
5460 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5462 else if ((flags
& BSF_FUNCTION
) != 0)
5464 else if ((flags
& BSF_OBJECT
) != 0)
5469 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5472 /* Processor-specific types. */
5473 if (type_ptr
!= NULL
5474 && bed
->elf_backend_get_symbol_type
)
5475 type
= ((*bed
->elf_backend_get_symbol_type
)
5476 (&type_ptr
->internal_elf_sym
, type
));
5478 if (flags
& BSF_SECTION_SYM
)
5480 if (flags
& BSF_GLOBAL
)
5481 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5483 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5485 else if (bfd_is_com_section (syms
[idx
]->section
))
5486 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5487 else if (bfd_is_und_section (syms
[idx
]->section
))
5488 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5492 else if (flags
& BSF_FILE
)
5493 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5496 int bind
= STB_LOCAL
;
5498 if (flags
& BSF_LOCAL
)
5500 else if (flags
& BSF_WEAK
)
5502 else if (flags
& BSF_GLOBAL
)
5505 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5508 if (type_ptr
!= NULL
)
5509 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5513 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5514 outbound_syms
+= bed
->s
->sizeof_sym
;
5515 if (outbound_shndx
!= NULL
)
5516 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5520 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5521 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5523 symstrtab_hdr
->sh_flags
= 0;
5524 symstrtab_hdr
->sh_addr
= 0;
5525 symstrtab_hdr
->sh_entsize
= 0;
5526 symstrtab_hdr
->sh_link
= 0;
5527 symstrtab_hdr
->sh_info
= 0;
5528 symstrtab_hdr
->sh_addralign
= 1;
5533 /* Return the number of bytes required to hold the symtab vector.
5535 Note that we base it on the count plus 1, since we will null terminate
5536 the vector allocated based on this size. However, the ELF symbol table
5537 always has a dummy entry as symbol #0, so it ends up even. */
5540 _bfd_elf_get_symtab_upper_bound (abfd
)
5545 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5547 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5548 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5550 symtab_size
-= sizeof (asymbol
*);
5556 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
5561 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5563 if (elf_dynsymtab (abfd
) == 0)
5565 bfd_set_error (bfd_error_invalid_operation
);
5569 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5570 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5572 symtab_size
-= sizeof (asymbol
*);
5578 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
5579 bfd
*abfd ATTRIBUTE_UNUSED
;
5582 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5585 /* Canonicalize the relocs. */
5588 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
5596 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5598 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5601 tblptr
= section
->relocation
;
5602 for (i
= 0; i
< section
->reloc_count
; i
++)
5603 *relptr
++ = tblptr
++;
5607 return section
->reloc_count
;
5611 _bfd_elf_get_symtab (abfd
, alocation
)
5613 asymbol
**alocation
;
5615 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5616 long symcount
= bed
->s
->slurp_symbol_table (abfd
, alocation
, FALSE
);
5619 bfd_get_symcount (abfd
) = symcount
;
5624 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
5626 asymbol
**alocation
;
5628 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5629 long symcount
= bed
->s
->slurp_symbol_table (abfd
, alocation
, TRUE
);
5632 bfd_get_dynamic_symcount (abfd
) = symcount
;
5636 /* Return the size required for the dynamic reloc entries. Any
5637 section that was actually installed in the BFD, and has type
5638 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5639 considered to be a dynamic reloc section. */
5642 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
5648 if (elf_dynsymtab (abfd
) == 0)
5650 bfd_set_error (bfd_error_invalid_operation
);
5654 ret
= sizeof (arelent
*);
5655 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5656 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5657 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5658 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5659 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5660 * sizeof (arelent
*));
5665 /* Canonicalize the dynamic relocation entries. Note that we return
5666 the dynamic relocations as a single block, although they are
5667 actually associated with particular sections; the interface, which
5668 was designed for SunOS style shared libraries, expects that there
5669 is only one set of dynamic relocs. Any section that was actually
5670 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5671 the dynamic symbol table, is considered to be a dynamic reloc
5675 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
5680 bfd_boolean (*slurp_relocs
)
5681 PARAMS ((bfd
*, asection
*, asymbol
**, bfd_boolean
));
5685 if (elf_dynsymtab (abfd
) == 0)
5687 bfd_set_error (bfd_error_invalid_operation
);
5691 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5693 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5695 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5696 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5697 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5702 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
5704 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5706 for (i
= 0; i
< count
; i
++)
5717 /* Read in the version information. */
5720 _bfd_elf_slurp_version_tables (abfd
)
5723 bfd_byte
*contents
= NULL
;
5726 if (elf_dynverdef (abfd
) != 0)
5728 Elf_Internal_Shdr
*hdr
;
5729 Elf_External_Verdef
*everdef
;
5730 Elf_Internal_Verdef
*iverdef
;
5731 Elf_Internal_Verdef
*iverdefarr
;
5732 Elf_Internal_Verdef iverdefmem
;
5734 unsigned int maxidx
;
5736 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5738 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5739 if (contents
== NULL
)
5741 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5742 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5745 /* We know the number of entries in the section but not the maximum
5746 index. Therefore we have to run through all entries and find
5748 everdef
= (Elf_External_Verdef
*) contents
;
5750 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5752 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5754 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
5755 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
5757 everdef
= ((Elf_External_Verdef
*)
5758 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
5761 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
5762 elf_tdata (abfd
)->verdef
= (Elf_Internal_Verdef
*) bfd_zalloc (abfd
, amt
);
5763 if (elf_tdata (abfd
)->verdef
== NULL
)
5766 elf_tdata (abfd
)->cverdefs
= maxidx
;
5768 everdef
= (Elf_External_Verdef
*) contents
;
5769 iverdefarr
= elf_tdata (abfd
)->verdef
;
5770 for (i
= 0; i
< hdr
->sh_info
; i
++)
5772 Elf_External_Verdaux
*everdaux
;
5773 Elf_Internal_Verdaux
*iverdaux
;
5776 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5778 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
5779 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
5781 iverdef
->vd_bfd
= abfd
;
5783 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
5784 iverdef
->vd_auxptr
= (Elf_Internal_Verdaux
*) bfd_alloc (abfd
, amt
);
5785 if (iverdef
->vd_auxptr
== NULL
)
5788 everdaux
= ((Elf_External_Verdaux
*)
5789 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
5790 iverdaux
= iverdef
->vd_auxptr
;
5791 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
5793 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
5795 iverdaux
->vda_nodename
=
5796 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5797 iverdaux
->vda_name
);
5798 if (iverdaux
->vda_nodename
== NULL
)
5801 if (j
+ 1 < iverdef
->vd_cnt
)
5802 iverdaux
->vda_nextptr
= iverdaux
+ 1;
5804 iverdaux
->vda_nextptr
= NULL
;
5806 everdaux
= ((Elf_External_Verdaux
*)
5807 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
5810 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
5812 if (i
+ 1 < hdr
->sh_info
)
5813 iverdef
->vd_nextdef
= iverdef
+ 1;
5815 iverdef
->vd_nextdef
= NULL
;
5817 everdef
= ((Elf_External_Verdef
*)
5818 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
5825 if (elf_dynverref (abfd
) != 0)
5827 Elf_Internal_Shdr
*hdr
;
5828 Elf_External_Verneed
*everneed
;
5829 Elf_Internal_Verneed
*iverneed
;
5832 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
5834 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
5835 elf_tdata (abfd
)->verref
=
5836 (Elf_Internal_Verneed
*) bfd_zalloc (abfd
, amt
);
5837 if (elf_tdata (abfd
)->verref
== NULL
)
5840 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
5842 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5843 if (contents
== NULL
)
5845 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5846 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5849 everneed
= (Elf_External_Verneed
*) contents
;
5850 iverneed
= elf_tdata (abfd
)->verref
;
5851 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
5853 Elf_External_Vernaux
*evernaux
;
5854 Elf_Internal_Vernaux
*ivernaux
;
5857 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
5859 iverneed
->vn_bfd
= abfd
;
5861 iverneed
->vn_filename
=
5862 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5864 if (iverneed
->vn_filename
== NULL
)
5867 amt
= iverneed
->vn_cnt
;
5868 amt
*= sizeof (Elf_Internal_Vernaux
);
5869 iverneed
->vn_auxptr
= (Elf_Internal_Vernaux
*) bfd_alloc (abfd
, amt
);
5871 evernaux
= ((Elf_External_Vernaux
*)
5872 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
5873 ivernaux
= iverneed
->vn_auxptr
;
5874 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
5876 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
5878 ivernaux
->vna_nodename
=
5879 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5880 ivernaux
->vna_name
);
5881 if (ivernaux
->vna_nodename
== NULL
)
5884 if (j
+ 1 < iverneed
->vn_cnt
)
5885 ivernaux
->vna_nextptr
= ivernaux
+ 1;
5887 ivernaux
->vna_nextptr
= NULL
;
5889 evernaux
= ((Elf_External_Vernaux
*)
5890 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
5893 if (i
+ 1 < hdr
->sh_info
)
5894 iverneed
->vn_nextref
= iverneed
+ 1;
5896 iverneed
->vn_nextref
= NULL
;
5898 everneed
= ((Elf_External_Verneed
*)
5899 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
5909 if (contents
== NULL
)
5915 _bfd_elf_make_empty_symbol (abfd
)
5918 elf_symbol_type
*newsym
;
5919 bfd_size_type amt
= sizeof (elf_symbol_type
);
5921 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, amt
);
5926 newsym
->symbol
.the_bfd
= abfd
;
5927 return &newsym
->symbol
;
5932 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
5933 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5937 bfd_symbol_info (symbol
, ret
);
5940 /* Return whether a symbol name implies a local symbol. Most targets
5941 use this function for the is_local_label_name entry point, but some
5945 _bfd_elf_is_local_label_name (abfd
, name
)
5946 bfd
*abfd ATTRIBUTE_UNUSED
;
5949 /* Normal local symbols start with ``.L''. */
5950 if (name
[0] == '.' && name
[1] == 'L')
5953 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5954 DWARF debugging symbols starting with ``..''. */
5955 if (name
[0] == '.' && name
[1] == '.')
5958 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5959 emitting DWARF debugging output. I suspect this is actually a
5960 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5961 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5962 underscore to be emitted on some ELF targets). For ease of use,
5963 we treat such symbols as local. */
5964 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5971 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5972 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5973 asymbol
*symbol ATTRIBUTE_UNUSED
;
5980 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5982 enum bfd_architecture arch
;
5983 unsigned long machine
;
5985 /* If this isn't the right architecture for this backend, and this
5986 isn't the generic backend, fail. */
5987 if (arch
!= get_elf_backend_data (abfd
)->arch
5988 && arch
!= bfd_arch_unknown
5989 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5992 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5995 /* Find the function to a particular section and offset,
5996 for error reporting. */
5999 elf_find_function (abfd
, section
, symbols
, offset
,
6000 filename_ptr
, functionname_ptr
)
6001 bfd
*abfd ATTRIBUTE_UNUSED
;
6005 const char **filename_ptr
;
6006 const char **functionname_ptr
;
6008 const char *filename
;
6017 for (p
= symbols
; *p
!= NULL
; p
++)
6021 q
= (elf_symbol_type
*) *p
;
6023 if (bfd_get_section (&q
->symbol
) != section
)
6026 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6031 filename
= bfd_asymbol_name (&q
->symbol
);
6035 if (q
->symbol
.section
== section
6036 && q
->symbol
.value
>= low_func
6037 && q
->symbol
.value
<= offset
)
6039 func
= (asymbol
*) q
;
6040 low_func
= q
->symbol
.value
;
6050 *filename_ptr
= filename
;
6051 if (functionname_ptr
)
6052 *functionname_ptr
= bfd_asymbol_name (func
);
6057 /* Find the nearest line to a particular section and offset,
6058 for error reporting. */
6061 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
6062 filename_ptr
, functionname_ptr
, line_ptr
)
6067 const char **filename_ptr
;
6068 const char **functionname_ptr
;
6069 unsigned int *line_ptr
;
6073 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6074 filename_ptr
, functionname_ptr
,
6077 if (!*functionname_ptr
)
6078 elf_find_function (abfd
, section
, symbols
, offset
,
6079 *filename_ptr
? NULL
: filename_ptr
,
6085 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6086 filename_ptr
, functionname_ptr
,
6088 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6090 if (!*functionname_ptr
)
6091 elf_find_function (abfd
, section
, symbols
, offset
,
6092 *filename_ptr
? NULL
: filename_ptr
,
6098 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6099 &found
, filename_ptr
,
6100 functionname_ptr
, line_ptr
,
6101 &elf_tdata (abfd
)->line_info
))
6103 if (found
&& (*functionname_ptr
|| *line_ptr
))
6106 if (symbols
== NULL
)
6109 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6110 filename_ptr
, functionname_ptr
))
6118 _bfd_elf_sizeof_headers (abfd
, reloc
)
6124 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6126 ret
+= get_program_header_size (abfd
);
6131 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
6136 bfd_size_type count
;
6138 Elf_Internal_Shdr
*hdr
;
6141 if (! abfd
->output_has_begun
6142 && ! (_bfd_elf_compute_section_file_positions
6143 (abfd
, (struct bfd_link_info
*) NULL
)))
6146 hdr
= &elf_section_data (section
)->this_hdr
;
6147 pos
= hdr
->sh_offset
+ offset
;
6148 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6149 || bfd_bwrite (location
, count
, abfd
) != count
)
6156 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
6157 bfd
*abfd ATTRIBUTE_UNUSED
;
6158 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
6159 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
6164 /* Try to convert a non-ELF reloc into an ELF one. */
6167 _bfd_elf_validate_reloc (abfd
, areloc
)
6171 /* Check whether we really have an ELF howto. */
6173 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6175 bfd_reloc_code_real_type code
;
6176 reloc_howto_type
*howto
;
6178 /* Alien reloc: Try to determine its type to replace it with an
6179 equivalent ELF reloc. */
6181 if (areloc
->howto
->pc_relative
)
6183 switch (areloc
->howto
->bitsize
)
6186 code
= BFD_RELOC_8_PCREL
;
6189 code
= BFD_RELOC_12_PCREL
;
6192 code
= BFD_RELOC_16_PCREL
;
6195 code
= BFD_RELOC_24_PCREL
;
6198 code
= BFD_RELOC_32_PCREL
;
6201 code
= BFD_RELOC_64_PCREL
;
6207 howto
= bfd_reloc_type_lookup (abfd
, code
);
6209 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6211 if (howto
->pcrel_offset
)
6212 areloc
->addend
+= areloc
->address
;
6214 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6219 switch (areloc
->howto
->bitsize
)
6225 code
= BFD_RELOC_14
;
6228 code
= BFD_RELOC_16
;
6231 code
= BFD_RELOC_26
;
6234 code
= BFD_RELOC_32
;
6237 code
= BFD_RELOC_64
;
6243 howto
= bfd_reloc_type_lookup (abfd
, code
);
6247 areloc
->howto
= howto
;
6255 (*_bfd_error_handler
)
6256 (_("%s: unsupported relocation type %s"),
6257 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6258 bfd_set_error (bfd_error_bad_value
);
6263 _bfd_elf_close_and_cleanup (abfd
)
6266 if (bfd_get_format (abfd
) == bfd_object
)
6268 if (elf_shstrtab (abfd
) != NULL
)
6269 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6272 return _bfd_generic_close_and_cleanup (abfd
);
6275 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6276 in the relocation's offset. Thus we cannot allow any sort of sanity
6277 range-checking to interfere. There is nothing else to do in processing
6280 bfd_reloc_status_type
6281 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
6282 bfd
*abfd ATTRIBUTE_UNUSED
;
6283 arelent
*re ATTRIBUTE_UNUSED
;
6284 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
6285 PTR data ATTRIBUTE_UNUSED
;
6286 asection
*is ATTRIBUTE_UNUSED
;
6287 bfd
*obfd ATTRIBUTE_UNUSED
;
6288 char **errmsg ATTRIBUTE_UNUSED
;
6290 return bfd_reloc_ok
;
6293 /* Elf core file support. Much of this only works on native
6294 toolchains, since we rely on knowing the
6295 machine-dependent procfs structure in order to pick
6296 out details about the corefile. */
6298 #ifdef HAVE_SYS_PROCFS_H
6299 # include <sys/procfs.h>
6302 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6305 elfcore_make_pid (abfd
)
6308 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6309 + (elf_tdata (abfd
)->core_pid
));
6312 /* If there isn't a section called NAME, make one, using
6313 data from SECT. Note, this function will generate a
6314 reference to NAME, so you shouldn't deallocate or
6318 elfcore_maybe_make_sect (abfd
, name
, sect
)
6325 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6328 sect2
= bfd_make_section (abfd
, name
);
6332 sect2
->_raw_size
= sect
->_raw_size
;
6333 sect2
->filepos
= sect
->filepos
;
6334 sect2
->flags
= sect
->flags
;
6335 sect2
->alignment_power
= sect
->alignment_power
;
6339 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6340 actually creates up to two pseudosections:
6341 - For the single-threaded case, a section named NAME, unless
6342 such a section already exists.
6343 - For the multi-threaded case, a section named "NAME/PID", where
6344 PID is elfcore_make_pid (abfd).
6345 Both pseudosections have identical contents. */
6347 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
6354 char *threaded_name
;
6358 /* Build the section name. */
6360 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6361 len
= strlen (buf
) + 1;
6362 threaded_name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6363 if (threaded_name
== NULL
)
6365 memcpy (threaded_name
, buf
, len
);
6367 sect
= bfd_make_section (abfd
, threaded_name
);
6370 sect
->_raw_size
= size
;
6371 sect
->filepos
= filepos
;
6372 sect
->flags
= SEC_HAS_CONTENTS
;
6373 sect
->alignment_power
= 2;
6375 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6378 /* prstatus_t exists on:
6380 linux 2.[01] + glibc
6384 #if defined (HAVE_PRSTATUS_T)
6385 static bfd_boolean elfcore_grok_prstatus
6386 PARAMS ((bfd
*, Elf_Internal_Note
*));
6389 elfcore_grok_prstatus (abfd
, note
)
6391 Elf_Internal_Note
*note
;
6396 if (note
->descsz
== sizeof (prstatus_t
))
6400 raw_size
= sizeof (prstat
.pr_reg
);
6401 offset
= offsetof (prstatus_t
, pr_reg
);
6402 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6404 /* Do not overwrite the core signal if it
6405 has already been set by another thread. */
6406 if (elf_tdata (abfd
)->core_signal
== 0)
6407 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6408 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6410 /* pr_who exists on:
6413 pr_who doesn't exist on:
6416 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6417 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6420 #if defined (HAVE_PRSTATUS32_T)
6421 else if (note
->descsz
== sizeof (prstatus32_t
))
6423 /* 64-bit host, 32-bit corefile */
6424 prstatus32_t prstat
;
6426 raw_size
= sizeof (prstat
.pr_reg
);
6427 offset
= offsetof (prstatus32_t
, pr_reg
);
6428 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6430 /* Do not overwrite the core signal if it
6431 has already been set by another thread. */
6432 if (elf_tdata (abfd
)->core_signal
== 0)
6433 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6434 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6436 /* pr_who exists on:
6439 pr_who doesn't exist on:
6442 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6443 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6446 #endif /* HAVE_PRSTATUS32_T */
6449 /* Fail - we don't know how to handle any other
6450 note size (ie. data object type). */
6454 /* Make a ".reg/999" section and a ".reg" section. */
6455 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6456 raw_size
, note
->descpos
+ offset
);
6458 #endif /* defined (HAVE_PRSTATUS_T) */
6460 /* Create a pseudosection containing the exact contents of NOTE. */
6462 elfcore_make_note_pseudosection (abfd
, name
, note
)
6465 Elf_Internal_Note
*note
;
6467 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6468 note
->descsz
, note
->descpos
);
6471 /* There isn't a consistent prfpregset_t across platforms,
6472 but it doesn't matter, because we don't have to pick this
6473 data structure apart. */
6476 elfcore_grok_prfpreg (abfd
, note
)
6478 Elf_Internal_Note
*note
;
6480 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6483 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6484 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6488 elfcore_grok_prxfpreg (abfd
, note
)
6490 Elf_Internal_Note
*note
;
6492 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6495 #if defined (HAVE_PRPSINFO_T)
6496 typedef prpsinfo_t elfcore_psinfo_t
;
6497 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6498 typedef prpsinfo32_t elfcore_psinfo32_t
;
6502 #if defined (HAVE_PSINFO_T)
6503 typedef psinfo_t elfcore_psinfo_t
;
6504 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6505 typedef psinfo32_t elfcore_psinfo32_t
;
6509 /* return a malloc'ed copy of a string at START which is at
6510 most MAX bytes long, possibly without a terminating '\0'.
6511 the copy will always have a terminating '\0'. */
6514 _bfd_elfcore_strndup (abfd
, start
, max
)
6520 char *end
= memchr (start
, '\0', max
);
6528 dups
= bfd_alloc (abfd
, (bfd_size_type
) len
+ 1);
6532 memcpy (dups
, start
, len
);
6538 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6539 static bfd_boolean elfcore_grok_psinfo
6540 PARAMS ((bfd
*, Elf_Internal_Note
*));
6543 elfcore_grok_psinfo (abfd
, note
)
6545 Elf_Internal_Note
*note
;
6547 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6549 elfcore_psinfo_t psinfo
;
6551 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6553 elf_tdata (abfd
)->core_program
6554 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6555 sizeof (psinfo
.pr_fname
));
6557 elf_tdata (abfd
)->core_command
6558 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6559 sizeof (psinfo
.pr_psargs
));
6561 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6562 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6564 /* 64-bit host, 32-bit corefile */
6565 elfcore_psinfo32_t psinfo
;
6567 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6569 elf_tdata (abfd
)->core_program
6570 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6571 sizeof (psinfo
.pr_fname
));
6573 elf_tdata (abfd
)->core_command
6574 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6575 sizeof (psinfo
.pr_psargs
));
6581 /* Fail - we don't know how to handle any other
6582 note size (ie. data object type). */
6586 /* Note that for some reason, a spurious space is tacked
6587 onto the end of the args in some (at least one anyway)
6588 implementations, so strip it off if it exists. */
6591 char *command
= elf_tdata (abfd
)->core_command
;
6592 int n
= strlen (command
);
6594 if (0 < n
&& command
[n
- 1] == ' ')
6595 command
[n
- 1] = '\0';
6600 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6602 #if defined (HAVE_PSTATUS_T)
6603 static bfd_boolean elfcore_grok_pstatus
6604 PARAMS ((bfd
*, Elf_Internal_Note
*));
6607 elfcore_grok_pstatus (abfd
, note
)
6609 Elf_Internal_Note
*note
;
6611 if (note
->descsz
== sizeof (pstatus_t
)
6612 #if defined (HAVE_PXSTATUS_T)
6613 || note
->descsz
== sizeof (pxstatus_t
)
6619 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6621 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6623 #if defined (HAVE_PSTATUS32_T)
6624 else if (note
->descsz
== sizeof (pstatus32_t
))
6626 /* 64-bit host, 32-bit corefile */
6629 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6631 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6634 /* Could grab some more details from the "representative"
6635 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6636 NT_LWPSTATUS note, presumably. */
6640 #endif /* defined (HAVE_PSTATUS_T) */
6642 #if defined (HAVE_LWPSTATUS_T)
6643 static bfd_boolean elfcore_grok_lwpstatus
6644 PARAMS ((bfd
*, Elf_Internal_Note
*));
6647 elfcore_grok_lwpstatus (abfd
, note
)
6649 Elf_Internal_Note
*note
;
6651 lwpstatus_t lwpstat
;
6657 if (note
->descsz
!= sizeof (lwpstat
)
6658 #if defined (HAVE_LWPXSTATUS_T)
6659 && note
->descsz
!= sizeof (lwpxstatus_t
)
6664 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6666 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6667 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6669 /* Make a ".reg/999" section. */
6671 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6672 len
= strlen (buf
) + 1;
6673 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6676 memcpy (name
, buf
, len
);
6678 sect
= bfd_make_section (abfd
, name
);
6682 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6683 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6684 sect
->filepos
= note
->descpos
6685 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6688 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6689 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
6690 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6693 sect
->flags
= SEC_HAS_CONTENTS
;
6694 sect
->alignment_power
= 2;
6696 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6699 /* Make a ".reg2/999" section */
6701 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6702 len
= strlen (buf
) + 1;
6703 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6706 memcpy (name
, buf
, len
);
6708 sect
= bfd_make_section (abfd
, name
);
6712 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6713 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6714 sect
->filepos
= note
->descpos
6715 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6718 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6719 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
6720 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6723 sect
->flags
= SEC_HAS_CONTENTS
;
6724 sect
->alignment_power
= 2;
6726 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6728 #endif /* defined (HAVE_LWPSTATUS_T) */
6730 #if defined (HAVE_WIN32_PSTATUS_T)
6732 elfcore_grok_win32pstatus (abfd
, note
)
6734 Elf_Internal_Note
*note
;
6740 win32_pstatus_t pstatus
;
6742 if (note
->descsz
< sizeof (pstatus
))
6745 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6747 switch (pstatus
.data_type
)
6749 case NOTE_INFO_PROCESS
:
6750 /* FIXME: need to add ->core_command. */
6751 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6752 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6755 case NOTE_INFO_THREAD
:
6756 /* Make a ".reg/999" section. */
6757 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6759 len
= strlen (buf
) + 1;
6760 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6764 memcpy (name
, buf
, len
);
6766 sect
= bfd_make_section (abfd
, name
);
6770 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6771 sect
->filepos
= (note
->descpos
6772 + offsetof (struct win32_pstatus
,
6773 data
.thread_info
.thread_context
));
6774 sect
->flags
= SEC_HAS_CONTENTS
;
6775 sect
->alignment_power
= 2;
6777 if (pstatus
.data
.thread_info
.is_active_thread
)
6778 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6782 case NOTE_INFO_MODULE
:
6783 /* Make a ".module/xxxxxxxx" section. */
6784 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6786 len
= strlen (buf
) + 1;
6787 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6791 memcpy (name
, buf
, len
);
6793 sect
= bfd_make_section (abfd
, name
);
6798 sect
->_raw_size
= note
->descsz
;
6799 sect
->filepos
= note
->descpos
;
6800 sect
->flags
= SEC_HAS_CONTENTS
;
6801 sect
->alignment_power
= 2;
6810 #endif /* HAVE_WIN32_PSTATUS_T */
6813 elfcore_grok_note (abfd
, note
)
6815 Elf_Internal_Note
*note
;
6817 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6825 if (bed
->elf_backend_grok_prstatus
)
6826 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
6828 #if defined (HAVE_PRSTATUS_T)
6829 return elfcore_grok_prstatus (abfd
, note
);
6834 #if defined (HAVE_PSTATUS_T)
6836 return elfcore_grok_pstatus (abfd
, note
);
6839 #if defined (HAVE_LWPSTATUS_T)
6841 return elfcore_grok_lwpstatus (abfd
, note
);
6844 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
6845 return elfcore_grok_prfpreg (abfd
, note
);
6847 #if defined (HAVE_WIN32_PSTATUS_T)
6848 case NT_WIN32PSTATUS
:
6849 return elfcore_grok_win32pstatus (abfd
, note
);
6852 case NT_PRXFPREG
: /* Linux SSE extension */
6853 if (note
->namesz
== 6
6854 && strcmp (note
->namedata
, "LINUX") == 0)
6855 return elfcore_grok_prxfpreg (abfd
, note
);
6861 if (bed
->elf_backend_grok_psinfo
)
6862 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
6864 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6865 return elfcore_grok_psinfo (abfd
, note
);
6873 elfcore_netbsd_get_lwpid (note
, lwpidp
)
6874 Elf_Internal_Note
*note
;
6879 cp
= strchr (note
->namedata
, '@');
6882 *lwpidp
= atoi(cp
+ 1);
6889 elfcore_grok_netbsd_procinfo (abfd
, note
)
6891 Elf_Internal_Note
*note
;
6894 /* Signal number at offset 0x08. */
6895 elf_tdata (abfd
)->core_signal
6896 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
6898 /* Process ID at offset 0x50. */
6899 elf_tdata (abfd
)->core_pid
6900 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
6902 /* Command name at 0x7c (max 32 bytes, including nul). */
6903 elf_tdata (abfd
)->core_command
6904 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
6910 elfcore_grok_netbsd_note (abfd
, note
)
6912 Elf_Internal_Note
*note
;
6916 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
6917 elf_tdata (abfd
)->core_lwpid
= lwp
;
6919 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
6921 /* NetBSD-specific core "procinfo". Note that we expect to
6922 find this note before any of the others, which is fine,
6923 since the kernel writes this note out first when it
6924 creates a core file. */
6926 return elfcore_grok_netbsd_procinfo (abfd
, note
);
6929 /* As of Jan 2002 there are no other machine-independent notes
6930 defined for NetBSD core files. If the note type is less
6931 than the start of the machine-dependent note types, we don't
6934 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
6938 switch (bfd_get_arch (abfd
))
6940 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6941 PT_GETFPREGS == mach+2. */
6943 case bfd_arch_alpha
:
6944 case bfd_arch_sparc
:
6947 case NT_NETBSDCORE_FIRSTMACH
+0:
6948 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6950 case NT_NETBSDCORE_FIRSTMACH
+2:
6951 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6957 /* On all other arch's, PT_GETREGS == mach+1 and
6958 PT_GETFPREGS == mach+3. */
6963 case NT_NETBSDCORE_FIRSTMACH
+1:
6964 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6966 case NT_NETBSDCORE_FIRSTMACH
+3:
6967 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6977 elfcore_grok_nto_status (abfd
, note
, tid
)
6979 Elf_Internal_Note
*note
;
6982 void *ddata
= note
->descdata
;
6987 /* nto_procfs_status 'pid' field is at offset 0. */
6988 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
6990 /* nto_procfs_status 'tid' field is at offset 4. */
6991 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
6993 /* nto_procfs_status 'what' field is at offset 14. */
6994 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14);
6996 /* Pass tid back. */
6997 *tid
= elf_tdata (abfd
)->core_lwpid
;
6999 /* Make a ".qnx_core_status/%d" section. */
7000 sprintf (buf
, ".qnx_core_status/%d", *tid
);
7002 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
7007 sect
= bfd_make_section (abfd
, name
);
7011 sect
->_raw_size
= note
->descsz
;
7012 sect
->filepos
= note
->descpos
;
7013 sect
->flags
= SEC_HAS_CONTENTS
;
7014 sect
->alignment_power
= 2;
7016 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7020 elfcore_grok_nto_gregs (abfd
, note
, tid
)
7022 Elf_Internal_Note
*note
;
7029 /* Make a ".reg/%d" section. */
7030 sprintf (buf
, ".reg/%d", tid
);
7032 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
7037 sect
= bfd_make_section (abfd
, name
);
7041 sect
->_raw_size
= note
->descsz
;
7042 sect
->filepos
= note
->descpos
;
7043 sect
->flags
= SEC_HAS_CONTENTS
;
7044 sect
->alignment_power
= 2;
7046 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7049 #define BFD_QNT_CORE_INFO 7
7050 #define BFD_QNT_CORE_STATUS 8
7051 #define BFD_QNT_CORE_GREG 9
7052 #define BFD_QNT_CORE_FPREG 10
7055 elfcore_grok_nto_note (abfd
, note
)
7057 Elf_Internal_Note
*note
;
7059 /* Every GREG section has a STATUS section before it. Store the
7060 tid from the previous call to pass down to the next gregs
7062 static pid_t tid
= 1;
7066 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7067 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7068 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7069 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7070 default: return TRUE
;
7074 /* Function: elfcore_write_note
7081 size of data for note
7084 End of buffer containing note. */
7087 elfcore_write_note (abfd
, buf
, bufsiz
, name
, type
, input
, size
)
7096 Elf_External_Note
*xnp
;
7106 struct elf_backend_data
*bed
;
7108 namesz
= strlen (name
) + 1;
7109 bed
= get_elf_backend_data (abfd
);
7110 pad
= -namesz
& (bed
->s
->file_align
- 1);
7113 newspace
= sizeof (Elf_External_Note
) - 1 + namesz
+ pad
+ size
;
7115 p
= realloc (buf
, *bufsiz
+ newspace
);
7117 *bufsiz
+= newspace
;
7118 xnp
= (Elf_External_Note
*) dest
;
7119 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7120 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7121 H_PUT_32 (abfd
, type
, xnp
->type
);
7125 memcpy (dest
, name
, namesz
);
7133 memcpy (dest
, input
, size
);
7137 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7139 elfcore_write_prpsinfo (abfd
, buf
, bufsiz
, fname
, psargs
)
7147 char *note_name
= "CORE";
7149 #if defined (HAVE_PSINFO_T)
7151 note_type
= NT_PSINFO
;
7154 note_type
= NT_PRPSINFO
;
7157 memset (&data
, 0, sizeof (data
));
7158 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7159 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7160 return elfcore_write_note (abfd
, buf
, bufsiz
,
7161 note_name
, note_type
, &data
, sizeof (data
));
7163 #endif /* PSINFO_T or PRPSINFO_T */
7165 #if defined (HAVE_PRSTATUS_T)
7167 elfcore_write_prstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
7176 char *note_name
= "CORE";
7178 memset (&prstat
, 0, sizeof (prstat
));
7179 prstat
.pr_pid
= pid
;
7180 prstat
.pr_cursig
= cursig
;
7181 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7182 return elfcore_write_note (abfd
, buf
, bufsiz
,
7183 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7185 #endif /* HAVE_PRSTATUS_T */
7187 #if defined (HAVE_LWPSTATUS_T)
7189 elfcore_write_lwpstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
7197 lwpstatus_t lwpstat
;
7198 char *note_name
= "CORE";
7200 memset (&lwpstat
, 0, sizeof (lwpstat
));
7201 lwpstat
.pr_lwpid
= pid
>> 16;
7202 lwpstat
.pr_cursig
= cursig
;
7203 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7204 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7205 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7207 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7208 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7210 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7211 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7214 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7215 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7217 #endif /* HAVE_LWPSTATUS_T */
7219 #if defined (HAVE_PSTATUS_T)
7221 elfcore_write_pstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
7230 char *note_name
= "CORE";
7232 memset (&pstat
, 0, sizeof (pstat
));
7233 pstat
.pr_pid
= pid
& 0xffff;
7234 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7235 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7238 #endif /* HAVE_PSTATUS_T */
7241 elfcore_write_prfpreg (abfd
, buf
, bufsiz
, fpregs
, size
)
7248 char *note_name
= "CORE";
7249 return elfcore_write_note (abfd
, buf
, bufsiz
,
7250 note_name
, NT_FPREGSET
, fpregs
, size
);
7254 elfcore_write_prxfpreg (abfd
, buf
, bufsiz
, xfpregs
, size
)
7261 char *note_name
= "LINUX";
7262 return elfcore_write_note (abfd
, buf
, bufsiz
,
7263 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7267 elfcore_read_notes (abfd
, offset
, size
)
7278 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7281 buf
= bfd_malloc (size
);
7285 if (bfd_bread (buf
, size
, abfd
) != size
)
7293 while (p
< buf
+ size
)
7295 /* FIXME: bad alignment assumption. */
7296 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7297 Elf_Internal_Note in
;
7299 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7301 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7302 in
.namedata
= xnp
->name
;
7304 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7305 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7306 in
.descpos
= offset
+ (in
.descdata
- buf
);
7308 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7310 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7313 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7315 if (! elfcore_grok_nto_note (abfd
, &in
))
7320 if (! elfcore_grok_note (abfd
, &in
))
7324 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7331 /* Providing external access to the ELF program header table. */
7333 /* Return an upper bound on the number of bytes required to store a
7334 copy of ABFD's program header table entries. Return -1 if an error
7335 occurs; bfd_get_error will return an appropriate code. */
7338 bfd_get_elf_phdr_upper_bound (abfd
)
7341 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7343 bfd_set_error (bfd_error_wrong_format
);
7347 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7350 /* Copy ABFD's program header table entries to *PHDRS. The entries
7351 will be stored as an array of Elf_Internal_Phdr structures, as
7352 defined in include/elf/internal.h. To find out how large the
7353 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7355 Return the number of program header table entries read, or -1 if an
7356 error occurs; bfd_get_error will return an appropriate code. */
7359 bfd_get_elf_phdrs (abfd
, phdrs
)
7365 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7367 bfd_set_error (bfd_error_wrong_format
);
7371 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7372 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7373 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7379 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
7380 bfd
*abfd ATTRIBUTE_UNUSED
;
7385 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7387 i_ehdrp
= elf_elfheader (abfd
);
7388 if (i_ehdrp
== NULL
)
7389 sprintf_vma (buf
, value
);
7392 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7394 #if BFD_HOST_64BIT_LONG
7395 sprintf (buf
, "%016lx", value
);
7397 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7398 _bfd_int64_low (value
));
7402 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7405 sprintf_vma (buf
, value
);
7410 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
7411 bfd
*abfd ATTRIBUTE_UNUSED
;
7416 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7418 i_ehdrp
= elf_elfheader (abfd
);
7419 if (i_ehdrp
== NULL
)
7420 fprintf_vma ((FILE *) stream
, value
);
7423 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7425 #if BFD_HOST_64BIT_LONG
7426 fprintf ((FILE *) stream
, "%016lx", value
);
7428 fprintf ((FILE *) stream
, "%08lx%08lx",
7429 _bfd_int64_high (value
), _bfd_int64_low (value
));
7433 fprintf ((FILE *) stream
, "%08lx",
7434 (unsigned long) (value
& 0xffffffff));
7437 fprintf_vma ((FILE *) stream
, value
);
7441 enum elf_reloc_type_class
7442 _bfd_elf_reloc_type_class (rela
)
7443 const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
;
7445 return reloc_class_normal
;
7448 /* For RELA architectures, return the relocation value for a
7449 relocation against a local symbol. */
7452 _bfd_elf_rela_local_sym (abfd
, sym
, sec
, rel
)
7454 Elf_Internal_Sym
*sym
;
7456 Elf_Internal_Rela
*rel
;
7460 relocation
= (sec
->output_section
->vma
7461 + sec
->output_offset
7463 if ((sec
->flags
& SEC_MERGE
)
7464 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7465 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7471 _bfd_merged_section_offset (abfd
, &msec
,
7472 elf_section_data (sec
)->sec_info
,
7473 sym
->st_value
+ rel
->r_addend
,
7476 rel
->r_addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
7482 _bfd_elf_rel_local_sym (abfd
, sym
, psec
, addend
)
7484 Elf_Internal_Sym
*sym
;
7488 asection
*sec
= *psec
;
7490 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7491 return sym
->st_value
+ addend
;
7493 return _bfd_merged_section_offset (abfd
, psec
,
7494 elf_section_data (sec
)->sec_info
,
7495 sym
->st_value
+ addend
, (bfd_vma
) 0);
7499 _bfd_elf_section_offset (abfd
, info
, sec
, offset
)
7501 struct bfd_link_info
*info
;
7505 struct bfd_elf_section_data
*sec_data
;
7507 sec_data
= elf_section_data (sec
);
7508 switch (sec
->sec_info_type
)
7510 case ELF_INFO_TYPE_STABS
:
7511 return _bfd_stab_section_offset (abfd
,
7512 &elf_hash_table (info
)->merge_info
,
7513 sec
, &sec_data
->sec_info
, offset
);
7514 case ELF_INFO_TYPE_EH_FRAME
:
7515 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);