1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean
assign_file_positions_except_relocs (bfd
*, struct bfd_link_info
*);
46 static bfd_boolean
prep_headers (bfd
*);
47 static bfd_boolean
swap_out_syms (bfd
*, struct bfd_strtab_hash
**, int) ;
48 static bfd_boolean
elfcore_read_notes (bfd
*, file_ptr
, bfd_size_type
) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd
*abfd
,
58 const Elf_External_Verdef
*src
,
59 Elf_Internal_Verdef
*dst
)
61 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
62 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
63 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
64 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
65 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
66 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
67 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd
*abfd
,
74 const Elf_Internal_Verdef
*src
,
75 Elf_External_Verdef
*dst
)
77 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
78 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
79 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
80 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
81 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
82 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
83 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd
*abfd
,
90 const Elf_External_Verdaux
*src
,
91 Elf_Internal_Verdaux
*dst
)
93 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
94 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd
*abfd
,
101 const Elf_Internal_Verdaux
*src
,
102 Elf_External_Verdaux
*dst
)
104 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
105 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd
*abfd
,
112 const Elf_External_Verneed
*src
,
113 Elf_Internal_Verneed
*dst
)
115 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
116 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
117 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
118 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
119 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd
*abfd
,
126 const Elf_Internal_Verneed
*src
,
127 Elf_External_Verneed
*dst
)
129 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
130 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
131 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
132 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
133 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd
*abfd
,
140 const Elf_External_Vernaux
*src
,
141 Elf_Internal_Vernaux
*dst
)
143 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
144 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
145 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
146 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
147 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd
*abfd
,
154 const Elf_Internal_Vernaux
*src
,
155 Elf_External_Vernaux
*dst
)
157 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
158 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
159 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
160 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
161 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd
*abfd
,
168 const Elf_External_Versym
*src
,
169 Elf_Internal_Versym
*dst
)
171 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd
*abfd
,
178 const Elf_Internal_Versym
*src
,
179 Elf_External_Versym
*dst
)
181 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg
)
190 const unsigned char *name
= (const unsigned char *) namearg
;
195 while ((ch
= *name
++) != '\0')
198 if ((g
= (h
& 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h
& 0xffffffff;
209 /* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
214 elf_read (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
218 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
220 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
222 if (bfd_bread (buf
, size
, abfd
) != size
)
224 if (bfd_get_error () != bfd_error_system_call
)
225 bfd_set_error (bfd_error_file_truncated
);
232 bfd_elf_mkobject (bfd
*abfd
)
234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
236 elf_tdata (abfd
) = bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
237 if (elf_tdata (abfd
) == 0)
239 /* Since everything is done at close time, do we need any
246 bfd_elf_mkcorefile (bfd
*abfd
)
248 /* I think this can be done just like an object file. */
249 return bfd_elf_mkobject (abfd
);
253 bfd_elf_get_str_section (bfd
*abfd
, unsigned int shindex
)
255 Elf_Internal_Shdr
**i_shdrp
;
256 char *shstrtab
= NULL
;
258 bfd_size_type shstrtabsize
;
260 i_shdrp
= elf_elfsections (abfd
);
261 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
264 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
265 if (shstrtab
== NULL
)
267 /* No cached one, attempt to read, and cache what we read. */
268 offset
= i_shdrp
[shindex
]->sh_offset
;
269 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
270 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
271 i_shdrp
[shindex
]->contents
= shstrtab
;
277 bfd_elf_string_from_elf_section (bfd
*abfd
,
278 unsigned int shindex
,
279 unsigned int strindex
)
281 Elf_Internal_Shdr
*hdr
;
286 hdr
= elf_elfsections (abfd
)[shindex
];
288 if (hdr
->contents
== NULL
289 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
292 if (strindex
>= hdr
->sh_size
)
294 (*_bfd_error_handler
)
295 (_("%s: invalid string offset %u >= %lu for section `%s'"),
296 bfd_archive_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
297 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
298 && strindex
== hdr
->sh_name
)
300 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
304 return ((char *) hdr
->contents
) + strindex
;
307 /* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
314 bfd_elf_get_elf_syms (bfd
*ibfd
,
315 Elf_Internal_Shdr
*symtab_hdr
,
318 Elf_Internal_Sym
*intsym_buf
,
320 Elf_External_Sym_Shndx
*extshndx_buf
)
322 Elf_Internal_Shdr
*shndx_hdr
;
324 const bfd_byte
*esym
;
325 Elf_External_Sym_Shndx
*alloc_extshndx
;
326 Elf_External_Sym_Shndx
*shndx
;
327 Elf_Internal_Sym
*isym
;
328 Elf_Internal_Sym
*isymend
;
329 const struct elf_backend_data
*bed
;
337 /* Normal syms might have section extension entries. */
339 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
340 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
342 /* Read the symbols. */
344 alloc_extshndx
= NULL
;
345 bed
= get_elf_backend_data (ibfd
);
346 extsym_size
= bed
->s
->sizeof_sym
;
347 amt
= symcount
* extsym_size
;
348 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
349 if (extsym_buf
== NULL
)
351 alloc_ext
= bfd_malloc (amt
);
352 extsym_buf
= alloc_ext
;
354 if (extsym_buf
== NULL
355 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
356 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
362 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
366 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
367 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
368 if (extshndx_buf
== NULL
)
370 alloc_extshndx
= bfd_malloc (amt
);
371 extshndx_buf
= alloc_extshndx
;
373 if (extshndx_buf
== NULL
374 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
375 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
382 if (intsym_buf
== NULL
)
384 bfd_size_type amt
= symcount
* sizeof (Elf_Internal_Sym
);
385 intsym_buf
= bfd_malloc (amt
);
386 if (intsym_buf
== NULL
)
390 /* Convert the symbols to internal form. */
391 isymend
= intsym_buf
+ symcount
;
392 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
394 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
395 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, shndx
, isym
);
398 if (alloc_ext
!= NULL
)
400 if (alloc_extshndx
!= NULL
)
401 free (alloc_extshndx
);
406 /* Look up a symbol name. */
408 bfd_elf_local_sym_name (bfd
*abfd
, Elf_Internal_Sym
*isym
)
410 unsigned int iname
= isym
->st_name
;
411 unsigned int shindex
= elf_tdata (abfd
)->symtab_hdr
.sh_link
;
412 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
414 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
415 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
418 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
421 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
422 sections. The first element is the flags, the rest are section
425 typedef union elf_internal_group
{
426 Elf_Internal_Shdr
*shdr
;
428 } Elf_Internal_Group
;
430 /* Return the name of the group signature symbol. Why isn't the
431 signature just a string? */
434 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
436 Elf_Internal_Shdr
*hdr
;
437 unsigned char esym
[sizeof (Elf64_External_Sym
)];
438 Elf_External_Sym_Shndx eshndx
;
439 Elf_Internal_Sym isym
;
441 /* First we need to ensure the symbol table is available. */
442 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
445 /* Go read the symbol. */
446 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
447 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
448 &isym
, esym
, &eshndx
) == NULL
)
451 return bfd_elf_local_sym_name (abfd
, &isym
);
454 /* Set next_in_group list pointer, and group name for NEWSECT. */
457 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
459 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
461 /* If num_group is zero, read in all SHT_GROUP sections. The count
462 is set to -1 if there are no SHT_GROUP sections. */
465 unsigned int i
, shnum
;
467 /* First count the number of groups. If we have a SHT_GROUP
468 section with just a flag word (ie. sh_size is 4), ignore it. */
469 shnum
= elf_numsections (abfd
);
471 for (i
= 0; i
< shnum
; i
++)
473 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
474 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
479 num_group
= (unsigned) -1;
480 elf_tdata (abfd
)->num_group
= num_group
;
484 /* We keep a list of elf section headers for group sections,
485 so we can find them quickly. */
486 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
487 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
488 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
492 for (i
= 0; i
< shnum
; i
++)
494 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
495 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
498 Elf_Internal_Group
*dest
;
500 /* Add to list of sections. */
501 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
504 /* Read the raw contents. */
505 BFD_ASSERT (sizeof (*dest
) >= 4);
506 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
507 shdr
->contents
= bfd_alloc (abfd
, amt
);
508 if (shdr
->contents
== NULL
509 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
510 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
514 /* Translate raw contents, a flag word followed by an
515 array of elf section indices all in target byte order,
516 to the flag word followed by an array of elf section
518 src
= shdr
->contents
+ shdr
->sh_size
;
519 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
526 idx
= H_GET_32 (abfd
, src
);
527 if (src
== shdr
->contents
)
530 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
531 shdr
->bfd_section
->flags
532 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
537 ((*_bfd_error_handler
)
538 (_("%s: invalid SHT_GROUP entry"),
539 bfd_archive_filename (abfd
)));
542 dest
->shdr
= elf_elfsections (abfd
)[idx
];
549 if (num_group
!= (unsigned) -1)
553 for (i
= 0; i
< num_group
; i
++)
555 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
556 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
557 unsigned int n_elt
= shdr
->sh_size
/ 4;
559 /* Look through this group's sections to see if current
560 section is a member. */
562 if ((++idx
)->shdr
== hdr
)
566 /* We are a member of this group. Go looking through
567 other members to see if any others are linked via
569 idx
= (Elf_Internal_Group
*) shdr
->contents
;
570 n_elt
= shdr
->sh_size
/ 4;
572 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
573 && elf_next_in_group (s
) != NULL
)
577 /* Snarf the group name from other member, and
578 insert current section in circular list. */
579 elf_group_name (newsect
) = elf_group_name (s
);
580 elf_next_in_group (newsect
) = elf_next_in_group (s
);
581 elf_next_in_group (s
) = newsect
;
587 gname
= group_signature (abfd
, shdr
);
590 elf_group_name (newsect
) = gname
;
592 /* Start a circular list with one element. */
593 elf_next_in_group (newsect
) = newsect
;
596 /* If the group section has been created, point to the
598 if (shdr
->bfd_section
!= NULL
)
599 elf_next_in_group (shdr
->bfd_section
) = newsect
;
607 if (elf_group_name (newsect
) == NULL
)
609 (*_bfd_error_handler
) (_("%s: no group info for section %s"),
610 bfd_archive_filename (abfd
), newsect
->name
);
616 _bfd_elf_setup_group_pointers (bfd
*abfd
)
619 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
620 bfd_boolean result
= TRUE
;
622 if (num_group
== (unsigned) -1)
625 for (i
= 0; i
< num_group
; i
++)
627 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
628 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
629 unsigned int n_elt
= shdr
->sh_size
/ 4;
632 if ((++idx
)->shdr
->bfd_section
)
633 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
634 else if (idx
->shdr
->sh_type
== SHT_RELA
635 || idx
->shdr
->sh_type
== SHT_REL
)
636 /* We won't include relocation sections in section groups in
637 output object files. We adjust the group section size here
638 so that relocatable link will work correctly when
639 relocation sections are in section group in input object
641 shdr
->bfd_section
->size
-= 4;
644 /* There are some unknown sections in the group. */
645 (*_bfd_error_handler
)
646 (_("%s: unknown [%d] section `%s' in group [%s]"),
647 bfd_archive_filename (abfd
),
648 (unsigned int) idx
->shdr
->sh_type
,
649 elf_string_from_elf_strtab (abfd
, idx
->shdr
->sh_name
),
650 shdr
->bfd_section
->name
);
658 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
660 return elf_next_in_group (sec
) != NULL
;
664 bfd_elf_discard_group (bfd
*abfd ATTRIBUTE_UNUSED
,
665 asection
*group ATTRIBUTE_UNUSED
)
668 asection
*first
= elf_next_in_group (group
);
673 s
->output_section
= bfd_abs_section_ptr
;
674 s
= elf_next_in_group (s
);
675 /* These lists are circular. */
680 /* FIXME: Never used. Remove it! */
686 /* Make a BFD section from an ELF section. We store a pointer to the
687 BFD section in the bfd_section field of the header. */
690 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
691 Elf_Internal_Shdr
*hdr
,
696 const struct elf_backend_data
*bed
;
698 if (hdr
->bfd_section
!= NULL
)
700 BFD_ASSERT (strcmp (name
,
701 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
705 newsect
= bfd_make_section_anyway (abfd
, name
);
709 hdr
->bfd_section
= newsect
;
710 elf_section_data (newsect
)->this_hdr
= *hdr
;
712 /* Always use the real type/flags. */
713 elf_section_type (newsect
) = hdr
->sh_type
;
714 elf_section_flags (newsect
) = hdr
->sh_flags
;
716 newsect
->filepos
= hdr
->sh_offset
;
718 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
719 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
720 || ! bfd_set_section_alignment (abfd
, newsect
,
721 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
724 flags
= SEC_NO_FLAGS
;
725 if (hdr
->sh_type
!= SHT_NOBITS
)
726 flags
|= SEC_HAS_CONTENTS
;
727 if (hdr
->sh_type
== SHT_GROUP
)
728 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
729 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
732 if (hdr
->sh_type
!= SHT_NOBITS
)
735 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
736 flags
|= SEC_READONLY
;
737 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
739 else if ((flags
& SEC_LOAD
) != 0)
741 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
744 newsect
->entsize
= hdr
->sh_entsize
;
745 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
746 flags
|= SEC_STRINGS
;
748 if (hdr
->sh_flags
& SHF_GROUP
)
749 if (!setup_group (abfd
, hdr
, newsect
))
751 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
752 flags
|= SEC_THREAD_LOCAL
;
754 /* The debugging sections appear to be recognized only by name, not
757 static const char *debug_sec_names
[] =
766 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
767 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
771 flags
|= SEC_DEBUGGING
;
774 /* As a GNU extension, if the name begins with .gnu.linkonce, we
775 only link a single copy of the section. This is used to support
776 g++. g++ will emit each template expansion in its own section.
777 The symbols will be defined as weak, so that multiple definitions
778 are permitted. The GNU linker extension is to actually discard
779 all but one of the sections. */
780 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
781 && elf_next_in_group (newsect
) == NULL
)
782 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
784 bed
= get_elf_backend_data (abfd
);
785 if (bed
->elf_backend_section_flags
)
786 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
789 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
792 if ((flags
& SEC_ALLOC
) != 0)
794 Elf_Internal_Phdr
*phdr
;
797 /* Look through the phdrs to see if we need to adjust the lma.
798 If all the p_paddr fields are zero, we ignore them, since
799 some ELF linkers produce such output. */
800 phdr
= elf_tdata (abfd
)->phdr
;
801 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
803 if (phdr
->p_paddr
!= 0)
806 if (i
< elf_elfheader (abfd
)->e_phnum
)
808 phdr
= elf_tdata (abfd
)->phdr
;
809 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
811 /* This section is part of this segment if its file
812 offset plus size lies within the segment's memory
813 span and, if the section is loaded, the extent of the
814 loaded data lies within the extent of the segment.
816 Note - we used to check the p_paddr field as well, and
817 refuse to set the LMA if it was 0. This is wrong
818 though, as a perfectly valid initialised segment can
819 have a p_paddr of zero. Some architectures, eg ARM,
820 place special significance on the address 0 and
821 executables need to be able to have a segment which
822 covers this address. */
823 if (phdr
->p_type
== PT_LOAD
824 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
825 && (hdr
->sh_offset
+ hdr
->sh_size
826 <= phdr
->p_offset
+ phdr
->p_memsz
)
827 && ((flags
& SEC_LOAD
) == 0
828 || (hdr
->sh_offset
+ hdr
->sh_size
829 <= phdr
->p_offset
+ phdr
->p_filesz
)))
831 if ((flags
& SEC_LOAD
) == 0)
832 newsect
->lma
= (phdr
->p_paddr
833 + hdr
->sh_addr
- phdr
->p_vaddr
);
835 /* We used to use the same adjustment for SEC_LOAD
836 sections, but that doesn't work if the segment
837 is packed with code from multiple VMAs.
838 Instead we calculate the section LMA based on
839 the segment LMA. It is assumed that the
840 segment will contain sections with contiguous
841 LMAs, even if the VMAs are not. */
842 newsect
->lma
= (phdr
->p_paddr
843 + hdr
->sh_offset
- phdr
->p_offset
);
845 /* With contiguous segments, we can't tell from file
846 offsets whether a section with zero size should
847 be placed at the end of one segment or the
848 beginning of the next. Decide based on vaddr. */
849 if (hdr
->sh_addr
>= phdr
->p_vaddr
850 && (hdr
->sh_addr
+ hdr
->sh_size
851 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
866 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
869 Helper functions for GDB to locate the string tables.
870 Since BFD hides string tables from callers, GDB needs to use an
871 internal hook to find them. Sun's .stabstr, in particular,
872 isn't even pointed to by the .stab section, so ordinary
873 mechanisms wouldn't work to find it, even if we had some.
876 struct elf_internal_shdr
*
877 bfd_elf_find_section (bfd
*abfd
, char *name
)
879 Elf_Internal_Shdr
**i_shdrp
;
884 i_shdrp
= elf_elfsections (abfd
);
887 shstrtab
= bfd_elf_get_str_section (abfd
,
888 elf_elfheader (abfd
)->e_shstrndx
);
889 if (shstrtab
!= NULL
)
891 max
= elf_numsections (abfd
);
892 for (i
= 1; i
< max
; i
++)
893 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
900 const char *const bfd_elf_section_type_names
[] = {
901 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
902 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
903 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
906 /* ELF relocs are against symbols. If we are producing relocatable
907 output, and the reloc is against an external symbol, and nothing
908 has given us any additional addend, the resulting reloc will also
909 be against the same symbol. In such a case, we don't want to
910 change anything about the way the reloc is handled, since it will
911 all be done at final link time. Rather than put special case code
912 into bfd_perform_relocation, all the reloc types use this howto
913 function. It just short circuits the reloc if producing
914 relocatable output against an external symbol. */
916 bfd_reloc_status_type
917 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
918 arelent
*reloc_entry
,
920 void *data ATTRIBUTE_UNUSED
,
921 asection
*input_section
,
923 char **error_message ATTRIBUTE_UNUSED
)
925 if (output_bfd
!= NULL
926 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
927 && (! reloc_entry
->howto
->partial_inplace
928 || reloc_entry
->addend
== 0))
930 reloc_entry
->address
+= input_section
->output_offset
;
934 return bfd_reloc_continue
;
937 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
940 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
943 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
944 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
947 /* Finish SHF_MERGE section merging. */
950 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
955 if (!is_elf_hash_table (info
->hash
))
958 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
959 if ((ibfd
->flags
& DYNAMIC
) == 0)
960 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
961 if ((sec
->flags
& SEC_MERGE
) != 0
962 && !bfd_is_abs_section (sec
->output_section
))
964 struct bfd_elf_section_data
*secdata
;
966 secdata
= elf_section_data (sec
);
967 if (! _bfd_add_merge_section (abfd
,
968 &elf_hash_table (info
)->merge_info
,
969 sec
, &secdata
->sec_info
))
971 else if (secdata
->sec_info
)
972 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
975 if (elf_hash_table (info
)->merge_info
!= NULL
)
976 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
977 merge_sections_remove_hook
);
982 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
984 sec
->output_section
= bfd_abs_section_ptr
;
985 sec
->output_offset
= sec
->vma
;
986 if (!is_elf_hash_table (info
->hash
))
989 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
992 /* Copy the program header and other data from one object module to
996 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
998 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
999 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1002 BFD_ASSERT (!elf_flags_init (obfd
)
1003 || (elf_elfheader (obfd
)->e_flags
1004 == elf_elfheader (ibfd
)->e_flags
));
1006 elf_gp (obfd
) = elf_gp (ibfd
);
1007 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1008 elf_flags_init (obfd
) = TRUE
;
1012 /* Print out the program headers. */
1015 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1018 Elf_Internal_Phdr
*p
;
1020 bfd_byte
*dynbuf
= NULL
;
1022 p
= elf_tdata (abfd
)->phdr
;
1027 fprintf (f
, _("\nProgram Header:\n"));
1028 c
= elf_elfheader (abfd
)->e_phnum
;
1029 for (i
= 0; i
< c
; i
++, p
++)
1036 case PT_NULL
: pt
= "NULL"; break;
1037 case PT_LOAD
: pt
= "LOAD"; break;
1038 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1039 case PT_INTERP
: pt
= "INTERP"; break;
1040 case PT_NOTE
: pt
= "NOTE"; break;
1041 case PT_SHLIB
: pt
= "SHLIB"; break;
1042 case PT_PHDR
: pt
= "PHDR"; break;
1043 case PT_TLS
: pt
= "TLS"; break;
1044 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1045 case PT_GNU_STACK
: pt
= "STACK"; break;
1046 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1047 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1049 fprintf (f
, "%8s off 0x", pt
);
1050 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1051 fprintf (f
, " vaddr 0x");
1052 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1053 fprintf (f
, " paddr 0x");
1054 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1055 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1056 fprintf (f
, " filesz 0x");
1057 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1058 fprintf (f
, " memsz 0x");
1059 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1060 fprintf (f
, " flags %c%c%c",
1061 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1062 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1063 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1064 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1065 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1070 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1074 unsigned long shlink
;
1075 bfd_byte
*extdyn
, *extdynend
;
1077 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1079 fprintf (f
, _("\nDynamic Section:\n"));
1081 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1084 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1087 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1089 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1090 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1093 extdynend
= extdyn
+ s
->size
;
1094 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1096 Elf_Internal_Dyn dyn
;
1099 bfd_boolean stringp
;
1101 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1103 if (dyn
.d_tag
== DT_NULL
)
1110 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1114 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1115 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1116 case DT_PLTGOT
: name
= "PLTGOT"; break;
1117 case DT_HASH
: name
= "HASH"; break;
1118 case DT_STRTAB
: name
= "STRTAB"; break;
1119 case DT_SYMTAB
: name
= "SYMTAB"; break;
1120 case DT_RELA
: name
= "RELA"; break;
1121 case DT_RELASZ
: name
= "RELASZ"; break;
1122 case DT_RELAENT
: name
= "RELAENT"; break;
1123 case DT_STRSZ
: name
= "STRSZ"; break;
1124 case DT_SYMENT
: name
= "SYMENT"; break;
1125 case DT_INIT
: name
= "INIT"; break;
1126 case DT_FINI
: name
= "FINI"; break;
1127 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1128 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1129 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1130 case DT_REL
: name
= "REL"; break;
1131 case DT_RELSZ
: name
= "RELSZ"; break;
1132 case DT_RELENT
: name
= "RELENT"; break;
1133 case DT_PLTREL
: name
= "PLTREL"; break;
1134 case DT_DEBUG
: name
= "DEBUG"; break;
1135 case DT_TEXTREL
: name
= "TEXTREL"; break;
1136 case DT_JMPREL
: name
= "JMPREL"; break;
1137 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1138 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1139 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1140 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1141 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1142 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1143 case DT_FLAGS
: name
= "FLAGS"; break;
1144 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1145 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1146 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1147 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1148 case DT_MOVEENT
: name
= "MOVEENT"; break;
1149 case DT_MOVESZ
: name
= "MOVESZ"; break;
1150 case DT_FEATURE
: name
= "FEATURE"; break;
1151 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1152 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1153 case DT_SYMINENT
: name
= "SYMINENT"; break;
1154 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1155 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1156 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1157 case DT_PLTPAD
: name
= "PLTPAD"; break;
1158 case DT_MOVETAB
: name
= "MOVETAB"; break;
1159 case DT_SYMINFO
: name
= "SYMINFO"; break;
1160 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1161 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1162 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1163 case DT_VERSYM
: name
= "VERSYM"; break;
1164 case DT_VERDEF
: name
= "VERDEF"; break;
1165 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1166 case DT_VERNEED
: name
= "VERNEED"; break;
1167 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1168 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1169 case DT_USED
: name
= "USED"; break;
1170 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1173 fprintf (f
, " %-11s ", name
);
1175 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1179 unsigned int tagv
= dyn
.d_un
.d_val
;
1181 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1184 fprintf (f
, "%s", string
);
1193 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1194 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1196 if (! _bfd_elf_slurp_version_tables (abfd
))
1200 if (elf_dynverdef (abfd
) != 0)
1202 Elf_Internal_Verdef
*t
;
1204 fprintf (f
, _("\nVersion definitions:\n"));
1205 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1207 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1208 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1209 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1211 Elf_Internal_Verdaux
*a
;
1214 for (a
= t
->vd_auxptr
->vda_nextptr
;
1217 fprintf (f
, "%s ", a
->vda_nodename
);
1223 if (elf_dynverref (abfd
) != 0)
1225 Elf_Internal_Verneed
*t
;
1227 fprintf (f
, _("\nVersion References:\n"));
1228 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1230 Elf_Internal_Vernaux
*a
;
1232 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1233 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1234 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1235 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1247 /* Display ELF-specific fields of a symbol. */
1250 bfd_elf_print_symbol (bfd
*abfd
,
1253 bfd_print_symbol_type how
)
1258 case bfd_print_symbol_name
:
1259 fprintf (file
, "%s", symbol
->name
);
1261 case bfd_print_symbol_more
:
1262 fprintf (file
, "elf ");
1263 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1264 fprintf (file
, " %lx", (long) symbol
->flags
);
1266 case bfd_print_symbol_all
:
1268 const char *section_name
;
1269 const char *name
= NULL
;
1270 const struct elf_backend_data
*bed
;
1271 unsigned char st_other
;
1274 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1276 bed
= get_elf_backend_data (abfd
);
1277 if (bed
->elf_backend_print_symbol_all
)
1278 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1282 name
= symbol
->name
;
1283 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1286 fprintf (file
, " %s\t", section_name
);
1287 /* Print the "other" value for a symbol. For common symbols,
1288 we've already printed the size; now print the alignment.
1289 For other symbols, we have no specified alignment, and
1290 we've printed the address; now print the size. */
1291 if (bfd_is_com_section (symbol
->section
))
1292 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1294 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1295 bfd_fprintf_vma (abfd
, file
, val
);
1297 /* If we have version information, print it. */
1298 if (elf_tdata (abfd
)->dynversym_section
!= 0
1299 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1300 || elf_tdata (abfd
)->dynverref_section
!= 0))
1302 unsigned int vernum
;
1303 const char *version_string
;
1305 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1308 version_string
= "";
1309 else if (vernum
== 1)
1310 version_string
= "Base";
1311 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1313 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1316 Elf_Internal_Verneed
*t
;
1318 version_string
= "";
1319 for (t
= elf_tdata (abfd
)->verref
;
1323 Elf_Internal_Vernaux
*a
;
1325 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1327 if (a
->vna_other
== vernum
)
1329 version_string
= a
->vna_nodename
;
1336 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1337 fprintf (file
, " %-11s", version_string
);
1342 fprintf (file
, " (%s)", version_string
);
1343 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1348 /* If the st_other field is not zero, print it. */
1349 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1354 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1355 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1356 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1358 /* Some other non-defined flags are also present, so print
1360 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1363 fprintf (file
, " %s", name
);
1369 /* Create an entry in an ELF linker hash table. */
1371 struct bfd_hash_entry
*
1372 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1373 struct bfd_hash_table
*table
,
1376 /* Allocate the structure if it has not already been allocated by a
1380 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1385 /* Call the allocation method of the superclass. */
1386 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1389 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1390 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1392 /* Set local fields. */
1395 ret
->dynstr_index
= 0;
1396 ret
->elf_hash_value
= 0;
1397 ret
->weakdef
= NULL
;
1398 ret
->verinfo
.verdef
= NULL
;
1399 ret
->vtable_entries_size
= 0;
1400 ret
->vtable_entries_used
= NULL
;
1401 ret
->vtable_parent
= NULL
;
1402 ret
->got
= htab
->init_refcount
;
1403 ret
->plt
= htab
->init_refcount
;
1405 ret
->type
= STT_NOTYPE
;
1407 /* Assume that we have been called by a non-ELF symbol reader.
1408 This flag is then reset by the code which reads an ELF input
1409 file. This ensures that a symbol created by a non-ELF symbol
1410 reader will have the flag set correctly. */
1411 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1417 /* Copy data from an indirect symbol to its direct symbol, hiding the
1418 old indirect symbol. Also used for copying flags to a weakdef. */
1421 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1422 struct elf_link_hash_entry
*dir
,
1423 struct elf_link_hash_entry
*ind
)
1426 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1428 /* Copy down any references that we may have already seen to the
1429 symbol which just became indirect. */
1431 dir
->elf_link_hash_flags
1432 |= ind
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_DYNAMIC
1433 | ELF_LINK_HASH_REF_REGULAR
1434 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1435 | ELF_LINK_NON_GOT_REF
1436 | ELF_LINK_HASH_NEEDS_PLT
1437 | ELF_LINK_POINTER_EQUALITY_NEEDED
);
1439 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1442 /* Copy over the global and procedure linkage table refcount entries.
1443 These may have been already set up by a check_relocs routine. */
1444 tmp
= dir
->got
.refcount
;
1445 if (tmp
< lowest_valid
)
1447 dir
->got
.refcount
= ind
->got
.refcount
;
1448 ind
->got
.refcount
= tmp
;
1451 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1453 tmp
= dir
->plt
.refcount
;
1454 if (tmp
< lowest_valid
)
1456 dir
->plt
.refcount
= ind
->plt
.refcount
;
1457 ind
->plt
.refcount
= tmp
;
1460 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1462 if (dir
->dynindx
== -1)
1464 dir
->dynindx
= ind
->dynindx
;
1465 dir
->dynstr_index
= ind
->dynstr_index
;
1467 ind
->dynstr_index
= 0;
1470 BFD_ASSERT (ind
->dynindx
== -1);
1474 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1475 struct elf_link_hash_entry
*h
,
1476 bfd_boolean force_local
)
1478 h
->plt
= elf_hash_table (info
)->init_offset
;
1479 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1482 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1483 if (h
->dynindx
!= -1)
1486 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1492 /* Initialize an ELF linker hash table. */
1495 _bfd_elf_link_hash_table_init
1496 (struct elf_link_hash_table
*table
,
1498 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1499 struct bfd_hash_table
*,
1504 table
->dynamic_sections_created
= FALSE
;
1505 table
->dynobj
= NULL
;
1506 /* Make sure can_refcount is extended to the width and signedness of
1507 init_refcount before we subtract one from it. */
1508 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1509 table
->init_refcount
.refcount
-= 1;
1510 table
->init_offset
.offset
= -(bfd_vma
) 1;
1511 /* The first dynamic symbol is a dummy. */
1512 table
->dynsymcount
= 1;
1513 table
->dynstr
= NULL
;
1514 table
->bucketcount
= 0;
1515 table
->needed
= NULL
;
1517 table
->merge_info
= NULL
;
1518 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1519 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1520 table
->dynlocal
= NULL
;
1521 table
->runpath
= NULL
;
1522 table
->tls_sec
= NULL
;
1523 table
->tls_size
= 0;
1524 table
->loaded
= NULL
;
1526 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1527 table
->root
.type
= bfd_link_elf_hash_table
;
1532 /* Create an ELF linker hash table. */
1534 struct bfd_link_hash_table
*
1535 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1537 struct elf_link_hash_table
*ret
;
1538 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1540 ret
= bfd_malloc (amt
);
1544 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1553 /* This is a hook for the ELF emulation code in the generic linker to
1554 tell the backend linker what file name to use for the DT_NEEDED
1555 entry for a dynamic object. */
1558 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1560 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1561 && bfd_get_format (abfd
) == bfd_object
)
1562 elf_dt_name (abfd
) = name
;
1566 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1569 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1570 && bfd_get_format (abfd
) == bfd_object
)
1571 lib_class
= elf_dyn_lib_class (abfd
);
1578 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1580 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1581 && bfd_get_format (abfd
) == bfd_object
)
1582 elf_dyn_lib_class (abfd
) = lib_class
;
1585 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1586 the linker ELF emulation code. */
1588 struct bfd_link_needed_list
*
1589 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1590 struct bfd_link_info
*info
)
1592 if (! is_elf_hash_table (info
->hash
))
1594 return elf_hash_table (info
)->needed
;
1597 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1598 hook for the linker ELF emulation code. */
1600 struct bfd_link_needed_list
*
1601 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1602 struct bfd_link_info
*info
)
1604 if (! is_elf_hash_table (info
->hash
))
1606 return elf_hash_table (info
)->runpath
;
1609 /* Get the name actually used for a dynamic object for a link. This
1610 is the SONAME entry if there is one. Otherwise, it is the string
1611 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1614 bfd_elf_get_dt_soname (bfd
*abfd
)
1616 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1617 && bfd_get_format (abfd
) == bfd_object
)
1618 return elf_dt_name (abfd
);
1622 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1623 the ELF linker emulation code. */
1626 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1627 struct bfd_link_needed_list
**pneeded
)
1630 bfd_byte
*dynbuf
= NULL
;
1632 unsigned long shlink
;
1633 bfd_byte
*extdyn
, *extdynend
;
1635 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1639 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1640 || bfd_get_format (abfd
) != bfd_object
)
1643 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1644 if (s
== NULL
|| s
->size
== 0)
1647 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1650 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1654 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1656 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1657 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1660 extdynend
= extdyn
+ s
->size
;
1661 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1663 Elf_Internal_Dyn dyn
;
1665 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1667 if (dyn
.d_tag
== DT_NULL
)
1670 if (dyn
.d_tag
== DT_NEEDED
)
1673 struct bfd_link_needed_list
*l
;
1674 unsigned int tagv
= dyn
.d_un
.d_val
;
1677 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1682 l
= bfd_alloc (abfd
, amt
);
1703 /* Allocate an ELF string table--force the first byte to be zero. */
1705 struct bfd_strtab_hash
*
1706 _bfd_elf_stringtab_init (void)
1708 struct bfd_strtab_hash
*ret
;
1710 ret
= _bfd_stringtab_init ();
1715 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1716 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1717 if (loc
== (bfd_size_type
) -1)
1719 _bfd_stringtab_free (ret
);
1726 /* ELF .o/exec file reading */
1728 /* Create a new bfd section from an ELF section header. */
1731 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1733 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1734 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1735 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1738 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1740 switch (hdr
->sh_type
)
1743 /* Inactive section. Throw it away. */
1746 case SHT_PROGBITS
: /* Normal section with contents. */
1747 case SHT_NOBITS
: /* .bss section. */
1748 case SHT_HASH
: /* .hash section. */
1749 case SHT_NOTE
: /* .note section. */
1750 case SHT_INIT_ARRAY
: /* .init_array section. */
1751 case SHT_FINI_ARRAY
: /* .fini_array section. */
1752 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1753 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1755 case SHT_DYNAMIC
: /* Dynamic linking information. */
1756 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1758 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1760 Elf_Internal_Shdr
*dynsymhdr
;
1762 /* The shared libraries distributed with hpux11 have a bogus
1763 sh_link field for the ".dynamic" section. Find the
1764 string table for the ".dynsym" section instead. */
1765 if (elf_dynsymtab (abfd
) != 0)
1767 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1768 hdr
->sh_link
= dynsymhdr
->sh_link
;
1772 unsigned int i
, num_sec
;
1774 num_sec
= elf_numsections (abfd
);
1775 for (i
= 1; i
< num_sec
; i
++)
1777 dynsymhdr
= elf_elfsections (abfd
)[i
];
1778 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1780 hdr
->sh_link
= dynsymhdr
->sh_link
;
1788 case SHT_SYMTAB
: /* A symbol table */
1789 if (elf_onesymtab (abfd
) == shindex
)
1792 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1793 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1794 elf_onesymtab (abfd
) = shindex
;
1795 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1796 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1797 abfd
->flags
|= HAS_SYMS
;
1799 /* Sometimes a shared object will map in the symbol table. If
1800 SHF_ALLOC is set, and this is a shared object, then we also
1801 treat this section as a BFD section. We can not base the
1802 decision purely on SHF_ALLOC, because that flag is sometimes
1803 set in a relocatable object file, which would confuse the
1805 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1806 && (abfd
->flags
& DYNAMIC
) != 0
1807 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1812 case SHT_DYNSYM
: /* A dynamic symbol table */
1813 if (elf_dynsymtab (abfd
) == shindex
)
1816 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1817 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1818 elf_dynsymtab (abfd
) = shindex
;
1819 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1820 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1821 abfd
->flags
|= HAS_SYMS
;
1823 /* Besides being a symbol table, we also treat this as a regular
1824 section, so that objcopy can handle it. */
1825 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1827 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1828 if (elf_symtab_shndx (abfd
) == shindex
)
1831 /* Get the associated symbol table. */
1832 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1833 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1836 elf_symtab_shndx (abfd
) = shindex
;
1837 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1838 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1841 case SHT_STRTAB
: /* A string table */
1842 if (hdr
->bfd_section
!= NULL
)
1844 if (ehdr
->e_shstrndx
== shindex
)
1846 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1847 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1851 unsigned int i
, num_sec
;
1853 num_sec
= elf_numsections (abfd
);
1854 for (i
= 1; i
< num_sec
; i
++)
1856 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1857 if (hdr2
->sh_link
== shindex
)
1859 if (! bfd_section_from_shdr (abfd
, i
))
1861 if (elf_onesymtab (abfd
) == i
)
1863 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1864 elf_elfsections (abfd
)[shindex
] =
1865 &elf_tdata (abfd
)->strtab_hdr
;
1868 if (elf_dynsymtab (abfd
) == i
)
1870 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1871 elf_elfsections (abfd
)[shindex
] = hdr
=
1872 &elf_tdata (abfd
)->dynstrtab_hdr
;
1873 /* We also treat this as a regular section, so
1874 that objcopy can handle it. */
1877 #if 0 /* Not handling other string tables specially right now. */
1878 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1879 /* We have a strtab for some random other section. */
1880 newsect
= (asection
*) hdr2
->bfd_section
;
1883 hdr
->bfd_section
= newsect
;
1884 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1886 elf_elfsections (abfd
)[shindex
] = hdr2
;
1892 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1896 /* *These* do a lot of work -- but build no sections! */
1898 asection
*target_sect
;
1899 Elf_Internal_Shdr
*hdr2
;
1900 unsigned int num_sec
= elf_numsections (abfd
);
1902 /* Check for a bogus link to avoid crashing. */
1903 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1904 || hdr
->sh_link
>= num_sec
)
1906 ((*_bfd_error_handler
)
1907 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1908 bfd_archive_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1909 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1912 /* For some incomprehensible reason Oracle distributes
1913 libraries for Solaris in which some of the objects have
1914 bogus sh_link fields. It would be nice if we could just
1915 reject them, but, unfortunately, some people need to use
1916 them. We scan through the section headers; if we find only
1917 one suitable symbol table, we clobber the sh_link to point
1918 to it. I hope this doesn't break anything. */
1919 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1920 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1926 for (scan
= 1; scan
< num_sec
; scan
++)
1928 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1929 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1940 hdr
->sh_link
= found
;
1943 /* Get the symbol table. */
1944 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1945 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1948 /* If this reloc section does not use the main symbol table we
1949 don't treat it as a reloc section. BFD can't adequately
1950 represent such a section, so at least for now, we don't
1951 try. We just present it as a normal section. We also
1952 can't use it as a reloc section if it points to the null
1954 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1955 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1957 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1959 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1960 if (target_sect
== NULL
)
1963 if ((target_sect
->flags
& SEC_RELOC
) == 0
1964 || target_sect
->reloc_count
== 0)
1965 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1969 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1970 amt
= sizeof (*hdr2
);
1971 hdr2
= bfd_alloc (abfd
, amt
);
1972 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1975 elf_elfsections (abfd
)[shindex
] = hdr2
;
1976 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1977 target_sect
->flags
|= SEC_RELOC
;
1978 target_sect
->relocation
= NULL
;
1979 target_sect
->rel_filepos
= hdr
->sh_offset
;
1980 /* In the section to which the relocations apply, mark whether
1981 its relocations are of the REL or RELA variety. */
1982 if (hdr
->sh_size
!= 0)
1983 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1984 abfd
->flags
|= HAS_RELOC
;
1989 case SHT_GNU_verdef
:
1990 elf_dynverdef (abfd
) = shindex
;
1991 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1992 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1995 case SHT_GNU_versym
:
1996 elf_dynversym (abfd
) = shindex
;
1997 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1998 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2001 case SHT_GNU_verneed
:
2002 elf_dynverref (abfd
) = shindex
;
2003 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2004 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2011 /* We need a BFD section for objcopy and relocatable linking,
2012 and it's handy to have the signature available as the section
2014 name
= group_signature (abfd
, hdr
);
2017 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
2019 if (hdr
->contents
!= NULL
)
2021 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2022 unsigned int n_elt
= hdr
->sh_size
/ 4;
2025 if (idx
->flags
& GRP_COMDAT
)
2026 hdr
->bfd_section
->flags
2027 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2029 /* We try to keep the same section order as it comes in. */
2031 while (--n_elt
!= 0)
2032 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2033 && elf_next_in_group (s
) != NULL
)
2035 elf_next_in_group (hdr
->bfd_section
) = s
;
2042 /* Check for any processor-specific section types. */
2044 if (bed
->elf_backend_section_from_shdr
)
2045 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
2053 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2054 Return SEC for sections that have no elf section, and NULL on error. */
2057 bfd_section_from_r_symndx (bfd
*abfd
,
2058 struct sym_sec_cache
*cache
,
2060 unsigned long r_symndx
)
2062 Elf_Internal_Shdr
*symtab_hdr
;
2063 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2064 Elf_External_Sym_Shndx eshndx
;
2065 Elf_Internal_Sym isym
;
2066 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2068 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2069 return cache
->sec
[ent
];
2071 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2072 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2073 &isym
, esym
, &eshndx
) == NULL
)
2076 if (cache
->abfd
!= abfd
)
2078 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2081 cache
->indx
[ent
] = r_symndx
;
2082 cache
->sec
[ent
] = sec
;
2083 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2084 || isym
.st_shndx
> SHN_HIRESERVE
)
2087 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2089 cache
->sec
[ent
] = s
;
2091 return cache
->sec
[ent
];
2094 /* Given an ELF section number, retrieve the corresponding BFD
2098 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2100 if (index
>= elf_numsections (abfd
))
2102 return elf_elfsections (abfd
)[index
]->bfd_section
;
2105 static struct bfd_elf_special_section
const special_sections
[] =
2107 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2108 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2109 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2110 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2111 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2112 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2113 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2114 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2115 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2116 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2117 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2118 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2119 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2120 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2121 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2122 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2123 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2124 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2125 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2126 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2127 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2128 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2129 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2130 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2131 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2132 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2133 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2134 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2135 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2136 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2137 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2138 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2139 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2140 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2141 { ".note", 5, -1, SHT_NOTE
, 0 },
2142 { ".rela", 5, -1, SHT_RELA
, 0 },
2143 { ".rel", 4, -1, SHT_REL
, 0 },
2144 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2145 { NULL
, 0, 0, 0, 0 }
2148 static const struct bfd_elf_special_section
*
2149 get_special_section (const char *name
,
2150 const struct bfd_elf_special_section
*special_sections
,
2154 int len
= strlen (name
);
2156 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2159 int prefix_len
= special_sections
[i
].prefix_length
;
2161 if (len
< prefix_len
)
2163 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2166 suffix_len
= special_sections
[i
].suffix_length
;
2167 if (suffix_len
<= 0)
2169 if (name
[prefix_len
] != 0)
2171 if (suffix_len
== 0)
2173 if (name
[prefix_len
] != '.'
2174 && (suffix_len
== -2
2175 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2181 if (len
< prefix_len
+ suffix_len
)
2183 if (memcmp (name
+ len
- suffix_len
,
2184 special_sections
[i
].prefix
+ prefix_len
,
2188 return &special_sections
[i
];
2194 const struct bfd_elf_special_section
*
2195 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2197 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2198 const struct bfd_elf_special_section
*ssect
= NULL
;
2200 /* See if this is one of the special sections. */
2203 unsigned int rela
= bed
->default_use_rela_p
;
2205 if (bed
->special_sections
)
2206 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2209 ssect
= get_special_section (name
, special_sections
, rela
);
2216 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2218 struct bfd_elf_section_data
*sdata
;
2219 const struct bfd_elf_special_section
*ssect
;
2221 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2224 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2227 sec
->used_by_bfd
= sdata
;
2230 elf_section_type (sec
) = SHT_NULL
;
2231 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2234 elf_section_type (sec
) = ssect
->type
;
2235 elf_section_flags (sec
) = ssect
->attr
;
2238 /* Indicate whether or not this section should use RELA relocations. */
2239 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2244 /* Create a new bfd section from an ELF program header.
2246 Since program segments have no names, we generate a synthetic name
2247 of the form segment<NUM>, where NUM is generally the index in the
2248 program header table. For segments that are split (see below) we
2249 generate the names segment<NUM>a and segment<NUM>b.
2251 Note that some program segments may have a file size that is different than
2252 (less than) the memory size. All this means is that at execution the
2253 system must allocate the amount of memory specified by the memory size,
2254 but only initialize it with the first "file size" bytes read from the
2255 file. This would occur for example, with program segments consisting
2256 of combined data+bss.
2258 To handle the above situation, this routine generates TWO bfd sections
2259 for the single program segment. The first has the length specified by
2260 the file size of the segment, and the second has the length specified
2261 by the difference between the two sizes. In effect, the segment is split
2262 into it's initialized and uninitialized parts.
2267 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2268 Elf_Internal_Phdr
*hdr
,
2270 const char *typename
)
2278 split
= ((hdr
->p_memsz
> 0)
2279 && (hdr
->p_filesz
> 0)
2280 && (hdr
->p_memsz
> hdr
->p_filesz
));
2281 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2282 len
= strlen (namebuf
) + 1;
2283 name
= bfd_alloc (abfd
, len
);
2286 memcpy (name
, namebuf
, len
);
2287 newsect
= bfd_make_section (abfd
, name
);
2288 if (newsect
== NULL
)
2290 newsect
->vma
= hdr
->p_vaddr
;
2291 newsect
->lma
= hdr
->p_paddr
;
2292 newsect
->size
= hdr
->p_filesz
;
2293 newsect
->filepos
= hdr
->p_offset
;
2294 newsect
->flags
|= SEC_HAS_CONTENTS
;
2295 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2296 if (hdr
->p_type
== PT_LOAD
)
2298 newsect
->flags
|= SEC_ALLOC
;
2299 newsect
->flags
|= SEC_LOAD
;
2300 if (hdr
->p_flags
& PF_X
)
2302 /* FIXME: all we known is that it has execute PERMISSION,
2304 newsect
->flags
|= SEC_CODE
;
2307 if (!(hdr
->p_flags
& PF_W
))
2309 newsect
->flags
|= SEC_READONLY
;
2314 sprintf (namebuf
, "%s%db", typename
, index
);
2315 len
= strlen (namebuf
) + 1;
2316 name
= bfd_alloc (abfd
, len
);
2319 memcpy (name
, namebuf
, len
);
2320 newsect
= bfd_make_section (abfd
, name
);
2321 if (newsect
== NULL
)
2323 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2324 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2325 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2326 if (hdr
->p_type
== PT_LOAD
)
2328 newsect
->flags
|= SEC_ALLOC
;
2329 if (hdr
->p_flags
& PF_X
)
2330 newsect
->flags
|= SEC_CODE
;
2332 if (!(hdr
->p_flags
& PF_W
))
2333 newsect
->flags
|= SEC_READONLY
;
2340 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2342 const struct elf_backend_data
*bed
;
2344 switch (hdr
->p_type
)
2347 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2350 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2353 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2356 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2359 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2361 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2366 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2369 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2371 case PT_GNU_EH_FRAME
:
2372 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2376 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2379 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2382 /* Check for any processor-specific program segment types.
2383 If no handler for them, default to making "segment" sections. */
2384 bed
= get_elf_backend_data (abfd
);
2385 if (bed
->elf_backend_section_from_phdr
)
2386 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2388 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2392 /* Initialize REL_HDR, the section-header for new section, containing
2393 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2394 relocations; otherwise, we use REL relocations. */
2397 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2398 Elf_Internal_Shdr
*rel_hdr
,
2400 bfd_boolean use_rela_p
)
2403 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2404 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2406 name
= bfd_alloc (abfd
, amt
);
2409 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2411 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2413 if (rel_hdr
->sh_name
== (unsigned int) -1)
2415 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2416 rel_hdr
->sh_entsize
= (use_rela_p
2417 ? bed
->s
->sizeof_rela
2418 : bed
->s
->sizeof_rel
);
2419 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2420 rel_hdr
->sh_flags
= 0;
2421 rel_hdr
->sh_addr
= 0;
2422 rel_hdr
->sh_size
= 0;
2423 rel_hdr
->sh_offset
= 0;
2428 /* Set up an ELF internal section header for a section. */
2431 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2433 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2434 bfd_boolean
*failedptr
= failedptrarg
;
2435 Elf_Internal_Shdr
*this_hdr
;
2439 /* We already failed; just get out of the bfd_map_over_sections
2444 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2446 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2447 asect
->name
, FALSE
);
2448 if (this_hdr
->sh_name
== (unsigned int) -1)
2454 this_hdr
->sh_flags
= 0;
2456 if ((asect
->flags
& SEC_ALLOC
) != 0
2457 || asect
->user_set_vma
)
2458 this_hdr
->sh_addr
= asect
->vma
;
2460 this_hdr
->sh_addr
= 0;
2462 this_hdr
->sh_offset
= 0;
2463 this_hdr
->sh_size
= asect
->size
;
2464 this_hdr
->sh_link
= 0;
2465 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2466 /* The sh_entsize and sh_info fields may have been set already by
2467 copy_private_section_data. */
2469 this_hdr
->bfd_section
= asect
;
2470 this_hdr
->contents
= NULL
;
2472 /* If the section type is unspecified, we set it based on
2474 if (this_hdr
->sh_type
== SHT_NULL
)
2476 if ((asect
->flags
& SEC_GROUP
) != 0)
2478 /* We also need to mark SHF_GROUP here for relocatable
2480 struct bfd_link_order
*l
;
2483 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2484 if (l
->type
== bfd_indirect_link_order
2485 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2488 /* The name is not important. Anything will do. */
2489 elf_group_name (elt
->output_section
) = "G";
2490 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2492 elt
= elf_next_in_group (elt
);
2493 /* During a relocatable link, the lists are
2496 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2498 this_hdr
->sh_type
= SHT_GROUP
;
2500 else if ((asect
->flags
& SEC_ALLOC
) != 0
2501 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2502 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2503 this_hdr
->sh_type
= SHT_NOBITS
;
2505 this_hdr
->sh_type
= SHT_PROGBITS
;
2508 switch (this_hdr
->sh_type
)
2514 case SHT_INIT_ARRAY
:
2515 case SHT_FINI_ARRAY
:
2516 case SHT_PREINIT_ARRAY
:
2523 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2527 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2531 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2535 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2536 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2540 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2541 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2544 case SHT_GNU_versym
:
2545 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2548 case SHT_GNU_verdef
:
2549 this_hdr
->sh_entsize
= 0;
2550 /* objcopy or strip will copy over sh_info, but may not set
2551 cverdefs. The linker will set cverdefs, but sh_info will be
2553 if (this_hdr
->sh_info
== 0)
2554 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2556 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2557 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2560 case SHT_GNU_verneed
:
2561 this_hdr
->sh_entsize
= 0;
2562 /* objcopy or strip will copy over sh_info, but may not set
2563 cverrefs. The linker will set cverrefs, but sh_info will be
2565 if (this_hdr
->sh_info
== 0)
2566 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2568 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2569 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2573 this_hdr
->sh_entsize
= 4;
2577 if ((asect
->flags
& SEC_ALLOC
) != 0)
2578 this_hdr
->sh_flags
|= SHF_ALLOC
;
2579 if ((asect
->flags
& SEC_READONLY
) == 0)
2580 this_hdr
->sh_flags
|= SHF_WRITE
;
2581 if ((asect
->flags
& SEC_CODE
) != 0)
2582 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2583 if ((asect
->flags
& SEC_MERGE
) != 0)
2585 this_hdr
->sh_flags
|= SHF_MERGE
;
2586 this_hdr
->sh_entsize
= asect
->entsize
;
2587 if ((asect
->flags
& SEC_STRINGS
) != 0)
2588 this_hdr
->sh_flags
|= SHF_STRINGS
;
2590 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2591 this_hdr
->sh_flags
|= SHF_GROUP
;
2592 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2594 this_hdr
->sh_flags
|= SHF_TLS
;
2595 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2597 struct bfd_link_order
*o
;
2599 this_hdr
->sh_size
= 0;
2600 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2601 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2602 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2603 if (this_hdr
->sh_size
)
2604 this_hdr
->sh_type
= SHT_NOBITS
;
2608 /* Check for processor-specific section types. */
2609 if (bed
->elf_backend_fake_sections
2610 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2613 /* If the section has relocs, set up a section header for the
2614 SHT_REL[A] section. If two relocation sections are required for
2615 this section, it is up to the processor-specific back-end to
2616 create the other. */
2617 if ((asect
->flags
& SEC_RELOC
) != 0
2618 && !_bfd_elf_init_reloc_shdr (abfd
,
2619 &elf_section_data (asect
)->rel_hdr
,
2625 /* Fill in the contents of a SHT_GROUP section. */
2628 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2630 bfd_boolean
*failedptr
= failedptrarg
;
2631 unsigned long symindx
;
2632 asection
*elt
, *first
;
2634 struct bfd_link_order
*l
;
2637 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2642 if (elf_group_id (sec
) != NULL
)
2643 symindx
= elf_group_id (sec
)->udata
.i
;
2647 /* If called from the assembler, swap_out_syms will have set up
2648 elf_section_syms; If called for "ld -r", use target_index. */
2649 if (elf_section_syms (abfd
) != NULL
)
2650 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2652 symindx
= sec
->target_index
;
2654 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2656 /* The contents won't be allocated for "ld -r" or objcopy. */
2658 if (sec
->contents
== NULL
)
2661 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2663 /* Arrange for the section to be written out. */
2664 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2665 if (sec
->contents
== NULL
)
2672 loc
= sec
->contents
+ sec
->size
;
2674 /* Get the pointer to the first section in the group that gas
2675 squirreled away here. objcopy arranges for this to be set to the
2676 start of the input section group. */
2677 first
= elt
= elf_next_in_group (sec
);
2679 /* First element is a flag word. Rest of section is elf section
2680 indices for all the sections of the group. Write them backwards
2681 just to keep the group in the same order as given in .section
2682 directives, not that it matters. */
2691 s
= s
->output_section
;
2694 idx
= elf_section_data (s
)->this_idx
;
2695 H_PUT_32 (abfd
, idx
, loc
);
2696 elt
= elf_next_in_group (elt
);
2701 /* If this is a relocatable link, then the above did nothing because
2702 SEC is the output section. Look through the input sections
2704 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2705 if (l
->type
== bfd_indirect_link_order
2706 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2711 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2712 elt
= elf_next_in_group (elt
);
2713 /* During a relocatable link, the lists are circular. */
2715 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2717 if ((loc
-= 4) != sec
->contents
)
2720 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2723 /* Assign all ELF section numbers. The dummy first section is handled here
2724 too. The link/info pointers for the standard section types are filled
2725 in here too, while we're at it. */
2728 assign_section_numbers (bfd
*abfd
)
2730 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2732 unsigned int section_number
, secn
;
2733 Elf_Internal_Shdr
**i_shdrp
;
2738 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2740 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2742 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2744 if (section_number
== SHN_LORESERVE
)
2745 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2746 d
->this_idx
= section_number
++;
2747 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2748 if ((sec
->flags
& SEC_RELOC
) == 0)
2752 if (section_number
== SHN_LORESERVE
)
2753 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2754 d
->rel_idx
= section_number
++;
2755 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2760 if (section_number
== SHN_LORESERVE
)
2761 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2762 d
->rel_idx2
= section_number
++;
2763 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2769 if (section_number
== SHN_LORESERVE
)
2770 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2771 t
->shstrtab_section
= section_number
++;
2772 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2773 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2775 if (bfd_get_symcount (abfd
) > 0)
2777 if (section_number
== SHN_LORESERVE
)
2778 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2779 t
->symtab_section
= section_number
++;
2780 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2781 if (section_number
> SHN_LORESERVE
- 2)
2783 if (section_number
== SHN_LORESERVE
)
2784 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2785 t
->symtab_shndx_section
= section_number
++;
2786 t
->symtab_shndx_hdr
.sh_name
2787 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2788 ".symtab_shndx", FALSE
);
2789 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2792 if (section_number
== SHN_LORESERVE
)
2793 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2794 t
->strtab_section
= section_number
++;
2795 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2798 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2799 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2801 elf_numsections (abfd
) = section_number
;
2802 elf_elfheader (abfd
)->e_shnum
= section_number
;
2803 if (section_number
> SHN_LORESERVE
)
2804 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2806 /* Set up the list of section header pointers, in agreement with the
2808 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2809 i_shdrp
= bfd_zalloc (abfd
, amt
);
2810 if (i_shdrp
== NULL
)
2813 amt
= sizeof (Elf_Internal_Shdr
);
2814 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2815 if (i_shdrp
[0] == NULL
)
2817 bfd_release (abfd
, i_shdrp
);
2821 elf_elfsections (abfd
) = i_shdrp
;
2823 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2824 if (bfd_get_symcount (abfd
) > 0)
2826 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2827 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2829 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2830 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2832 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2833 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2836 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2838 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2842 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2843 if (d
->rel_idx
!= 0)
2844 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2845 if (d
->rel_idx2
!= 0)
2846 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2848 /* Fill in the sh_link and sh_info fields while we're at it. */
2850 /* sh_link of a reloc section is the section index of the symbol
2851 table. sh_info is the section index of the section to which
2852 the relocation entries apply. */
2853 if (d
->rel_idx
!= 0)
2855 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2856 d
->rel_hdr
.sh_info
= d
->this_idx
;
2858 if (d
->rel_idx2
!= 0)
2860 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2861 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2864 /* We need to set up sh_link for SHF_LINK_ORDER. */
2865 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2867 s
= elf_linked_to_section (sec
);
2869 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2872 struct bfd_link_order
*p
;
2874 /* Find out what the corresponding section in output
2876 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2878 s
= p
->u
.indirect
.section
;
2879 if (p
->type
== bfd_indirect_link_order
2880 && (bfd_get_flavour (s
->owner
)
2881 == bfd_target_elf_flavour
))
2883 Elf_Internal_Shdr
** const elf_shdrp
2884 = elf_elfsections (s
->owner
);
2886 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2887 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2889 The Intel C compiler generates SHT_IA_64_UNWIND with
2890 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2891 sh_info fields. Hence we could get the situation
2892 where elfsec is 0. */
2895 const struct elf_backend_data
*bed
2896 = get_elf_backend_data (abfd
);
2897 if (bed
->link_order_error_handler
)
2899 char *name
= bfd_get_section_ident (s
);
2900 bed
->link_order_error_handler
2901 (_("%s: warning: sh_link not set for section `%s'"),
2902 bfd_archive_filename (abfd
),
2903 name
? name
: s
->name
);
2910 s
= elf_shdrp
[elfsec
]->bfd_section
->output_section
;
2911 BFD_ASSERT (s
!= NULL
);
2912 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2920 switch (d
->this_hdr
.sh_type
)
2924 /* A reloc section which we are treating as a normal BFD
2925 section. sh_link is the section index of the symbol
2926 table. sh_info is the section index of the section to
2927 which the relocation entries apply. We assume that an
2928 allocated reloc section uses the dynamic symbol table.
2929 FIXME: How can we be sure? */
2930 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2932 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2934 /* We look up the section the relocs apply to by name. */
2936 if (d
->this_hdr
.sh_type
== SHT_REL
)
2940 s
= bfd_get_section_by_name (abfd
, name
);
2942 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2946 /* We assume that a section named .stab*str is a stabs
2947 string section. We look for a section with the same name
2948 but without the trailing ``str'', and set its sh_link
2949 field to point to this section. */
2950 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2951 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2956 len
= strlen (sec
->name
);
2957 alc
= bfd_malloc (len
- 2);
2960 memcpy (alc
, sec
->name
, len
- 3);
2961 alc
[len
- 3] = '\0';
2962 s
= bfd_get_section_by_name (abfd
, alc
);
2966 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2968 /* This is a .stab section. */
2969 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2970 elf_section_data (s
)->this_hdr
.sh_entsize
2971 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2978 case SHT_GNU_verneed
:
2979 case SHT_GNU_verdef
:
2980 /* sh_link is the section header index of the string table
2981 used for the dynamic entries, or the symbol table, or the
2983 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2985 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2989 case SHT_GNU_versym
:
2990 /* sh_link is the section header index of the symbol table
2991 this hash table or version table is for. */
2992 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2994 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2998 d
->this_hdr
.sh_link
= t
->symtab_section
;
3002 for (secn
= 1; secn
< section_number
; ++secn
)
3003 if (i_shdrp
[secn
] == NULL
)
3004 i_shdrp
[secn
] = i_shdrp
[0];
3006 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3007 i_shdrp
[secn
]->sh_name
);
3011 /* Map symbol from it's internal number to the external number, moving
3012 all local symbols to be at the head of the list. */
3015 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3017 /* If the backend has a special mapping, use it. */
3018 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3019 if (bed
->elf_backend_sym_is_global
)
3020 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3022 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3023 || bfd_is_und_section (bfd_get_section (sym
))
3024 || bfd_is_com_section (bfd_get_section (sym
)));
3028 elf_map_symbols (bfd
*abfd
)
3030 unsigned int symcount
= bfd_get_symcount (abfd
);
3031 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3032 asymbol
**sect_syms
;
3033 unsigned int num_locals
= 0;
3034 unsigned int num_globals
= 0;
3035 unsigned int num_locals2
= 0;
3036 unsigned int num_globals2
= 0;
3044 fprintf (stderr
, "elf_map_symbols\n");
3048 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3050 if (max_index
< asect
->index
)
3051 max_index
= asect
->index
;
3055 amt
= max_index
* sizeof (asymbol
*);
3056 sect_syms
= bfd_zalloc (abfd
, amt
);
3057 if (sect_syms
== NULL
)
3059 elf_section_syms (abfd
) = sect_syms
;
3060 elf_num_section_syms (abfd
) = max_index
;
3062 /* Init sect_syms entries for any section symbols we have already
3063 decided to output. */
3064 for (idx
= 0; idx
< symcount
; idx
++)
3066 asymbol
*sym
= syms
[idx
];
3068 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3075 if (sec
->owner
!= NULL
)
3077 if (sec
->owner
!= abfd
)
3079 if (sec
->output_offset
!= 0)
3082 sec
= sec
->output_section
;
3084 /* Empty sections in the input files may have had a
3085 section symbol created for them. (See the comment
3086 near the end of _bfd_generic_link_output_symbols in
3087 linker.c). If the linker script discards such
3088 sections then we will reach this point. Since we know
3089 that we cannot avoid this case, we detect it and skip
3090 the abort and the assignment to the sect_syms array.
3091 To reproduce this particular case try running the
3092 linker testsuite test ld-scripts/weak.exp for an ELF
3093 port that uses the generic linker. */
3094 if (sec
->owner
== NULL
)
3097 BFD_ASSERT (sec
->owner
== abfd
);
3099 sect_syms
[sec
->index
] = syms
[idx
];
3104 /* Classify all of the symbols. */
3105 for (idx
= 0; idx
< symcount
; idx
++)
3107 if (!sym_is_global (abfd
, syms
[idx
]))
3113 /* We will be adding a section symbol for each BFD section. Most normal
3114 sections will already have a section symbol in outsymbols, but
3115 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3116 at least in that case. */
3117 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3119 if (sect_syms
[asect
->index
] == NULL
)
3121 if (!sym_is_global (abfd
, asect
->symbol
))
3128 /* Now sort the symbols so the local symbols are first. */
3129 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3130 new_syms
= bfd_alloc (abfd
, amt
);
3132 if (new_syms
== NULL
)
3135 for (idx
= 0; idx
< symcount
; idx
++)
3137 asymbol
*sym
= syms
[idx
];
3140 if (!sym_is_global (abfd
, sym
))
3143 i
= num_locals
+ num_globals2
++;
3145 sym
->udata
.i
= i
+ 1;
3147 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3149 if (sect_syms
[asect
->index
] == NULL
)
3151 asymbol
*sym
= asect
->symbol
;
3154 sect_syms
[asect
->index
] = sym
;
3155 if (!sym_is_global (abfd
, sym
))
3158 i
= num_locals
+ num_globals2
++;
3160 sym
->udata
.i
= i
+ 1;
3164 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3166 elf_num_locals (abfd
) = num_locals
;
3167 elf_num_globals (abfd
) = num_globals
;
3171 /* Align to the maximum file alignment that could be required for any
3172 ELF data structure. */
3174 static inline file_ptr
3175 align_file_position (file_ptr off
, int align
)
3177 return (off
+ align
- 1) & ~(align
- 1);
3180 /* Assign a file position to a section, optionally aligning to the
3181 required section alignment. */
3184 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3192 al
= i_shdrp
->sh_addralign
;
3194 offset
= BFD_ALIGN (offset
, al
);
3196 i_shdrp
->sh_offset
= offset
;
3197 if (i_shdrp
->bfd_section
!= NULL
)
3198 i_shdrp
->bfd_section
->filepos
= offset
;
3199 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3200 offset
+= i_shdrp
->sh_size
;
3204 /* Compute the file positions we are going to put the sections at, and
3205 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3206 is not NULL, this is being called by the ELF backend linker. */
3209 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3210 struct bfd_link_info
*link_info
)
3212 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3214 struct bfd_strtab_hash
*strtab
;
3215 Elf_Internal_Shdr
*shstrtab_hdr
;
3217 if (abfd
->output_has_begun
)
3220 /* Do any elf backend specific processing first. */
3221 if (bed
->elf_backend_begin_write_processing
)
3222 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3224 if (! prep_headers (abfd
))
3227 /* Post process the headers if necessary. */
3228 if (bed
->elf_backend_post_process_headers
)
3229 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3232 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3236 if (!assign_section_numbers (abfd
))
3239 /* The backend linker builds symbol table information itself. */
3240 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3242 /* Non-zero if doing a relocatable link. */
3243 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3245 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3249 if (link_info
== NULL
)
3251 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3256 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3257 /* sh_name was set in prep_headers. */
3258 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3259 shstrtab_hdr
->sh_flags
= 0;
3260 shstrtab_hdr
->sh_addr
= 0;
3261 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3262 shstrtab_hdr
->sh_entsize
= 0;
3263 shstrtab_hdr
->sh_link
= 0;
3264 shstrtab_hdr
->sh_info
= 0;
3265 /* sh_offset is set in assign_file_positions_except_relocs. */
3266 shstrtab_hdr
->sh_addralign
= 1;
3268 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3271 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3274 Elf_Internal_Shdr
*hdr
;
3276 off
= elf_tdata (abfd
)->next_file_pos
;
3278 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3279 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3281 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3282 if (hdr
->sh_size
!= 0)
3283 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3285 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3286 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3288 elf_tdata (abfd
)->next_file_pos
= off
;
3290 /* Now that we know where the .strtab section goes, write it
3292 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3293 || ! _bfd_stringtab_emit (abfd
, strtab
))
3295 _bfd_stringtab_free (strtab
);
3298 abfd
->output_has_begun
= TRUE
;
3303 /* Create a mapping from a set of sections to a program segment. */
3305 static struct elf_segment_map
*
3306 make_mapping (bfd
*abfd
,
3307 asection
**sections
,
3312 struct elf_segment_map
*m
;
3317 amt
= sizeof (struct elf_segment_map
);
3318 amt
+= (to
- from
- 1) * sizeof (asection
*);
3319 m
= bfd_zalloc (abfd
, amt
);
3323 m
->p_type
= PT_LOAD
;
3324 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3325 m
->sections
[i
- from
] = *hdrpp
;
3326 m
->count
= to
- from
;
3328 if (from
== 0 && phdr
)
3330 /* Include the headers in the first PT_LOAD segment. */
3331 m
->includes_filehdr
= 1;
3332 m
->includes_phdrs
= 1;
3338 /* Set up a mapping from BFD sections to program segments. */
3341 map_sections_to_segments (bfd
*abfd
)
3343 asection
**sections
= NULL
;
3347 struct elf_segment_map
*mfirst
;
3348 struct elf_segment_map
**pm
;
3349 struct elf_segment_map
*m
;
3352 unsigned int phdr_index
;
3353 bfd_vma maxpagesize
;
3355 bfd_boolean phdr_in_segment
= TRUE
;
3356 bfd_boolean writable
;
3358 asection
*first_tls
= NULL
;
3359 asection
*dynsec
, *eh_frame_hdr
;
3362 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3365 if (bfd_count_sections (abfd
) == 0)
3368 /* Select the allocated sections, and sort them. */
3370 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3371 sections
= bfd_malloc (amt
);
3372 if (sections
== NULL
)
3376 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3378 if ((s
->flags
& SEC_ALLOC
) != 0)
3384 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3387 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3389 /* Build the mapping. */
3394 /* If we have a .interp section, then create a PT_PHDR segment for
3395 the program headers and a PT_INTERP segment for the .interp
3397 s
= bfd_get_section_by_name (abfd
, ".interp");
3398 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3400 amt
= sizeof (struct elf_segment_map
);
3401 m
= bfd_zalloc (abfd
, amt
);
3405 m
->p_type
= PT_PHDR
;
3406 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3407 m
->p_flags
= PF_R
| PF_X
;
3408 m
->p_flags_valid
= 1;
3409 m
->includes_phdrs
= 1;
3414 amt
= sizeof (struct elf_segment_map
);
3415 m
= bfd_zalloc (abfd
, amt
);
3419 m
->p_type
= PT_INTERP
;
3427 /* Look through the sections. We put sections in the same program
3428 segment when the start of the second section can be placed within
3429 a few bytes of the end of the first section. */
3433 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3435 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3437 && (dynsec
->flags
& SEC_LOAD
) == 0)
3440 /* Deal with -Ttext or something similar such that the first section
3441 is not adjacent to the program headers. This is an
3442 approximation, since at this point we don't know exactly how many
3443 program headers we will need. */
3446 bfd_size_type phdr_size
;
3448 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3450 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3451 if ((abfd
->flags
& D_PAGED
) == 0
3452 || sections
[0]->lma
< phdr_size
3453 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3454 phdr_in_segment
= FALSE
;
3457 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3460 bfd_boolean new_segment
;
3464 /* See if this section and the last one will fit in the same
3467 if (last_hdr
== NULL
)
3469 /* If we don't have a segment yet, then we don't need a new
3470 one (we build the last one after this loop). */
3471 new_segment
= FALSE
;
3473 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3475 /* If this section has a different relation between the
3476 virtual address and the load address, then we need a new
3480 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3481 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3483 /* If putting this section in this segment would force us to
3484 skip a page in the segment, then we need a new segment. */
3487 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3488 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3490 /* We don't want to put a loadable section after a
3491 nonloadable section in the same segment.
3492 Consider .tbss sections as loadable for this purpose. */
3495 else if ((abfd
->flags
& D_PAGED
) == 0)
3497 /* If the file is not demand paged, which means that we
3498 don't require the sections to be correctly aligned in the
3499 file, then there is no other reason for a new segment. */
3500 new_segment
= FALSE
;
3503 && (hdr
->flags
& SEC_READONLY
) == 0
3504 && (((last_hdr
->lma
+ last_size
- 1)
3505 & ~(maxpagesize
- 1))
3506 != (hdr
->lma
& ~(maxpagesize
- 1))))
3508 /* We don't want to put a writable section in a read only
3509 segment, unless they are on the same page in memory
3510 anyhow. We already know that the last section does not
3511 bring us past the current section on the page, so the
3512 only case in which the new section is not on the same
3513 page as the previous section is when the previous section
3514 ends precisely on a page boundary. */
3519 /* Otherwise, we can use the same segment. */
3520 new_segment
= FALSE
;
3525 if ((hdr
->flags
& SEC_READONLY
) == 0)
3528 /* .tbss sections effectively have zero size. */
3529 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3530 last_size
= hdr
->size
;
3536 /* We need a new program segment. We must create a new program
3537 header holding all the sections from phdr_index until hdr. */
3539 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3546 if ((hdr
->flags
& SEC_READONLY
) == 0)
3552 /* .tbss sections effectively have zero size. */
3553 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3554 last_size
= hdr
->size
;
3558 phdr_in_segment
= FALSE
;
3561 /* Create a final PT_LOAD program segment. */
3562 if (last_hdr
!= NULL
)
3564 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3572 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3575 amt
= sizeof (struct elf_segment_map
);
3576 m
= bfd_zalloc (abfd
, amt
);
3580 m
->p_type
= PT_DYNAMIC
;
3582 m
->sections
[0] = dynsec
;
3588 /* For each loadable .note section, add a PT_NOTE segment. We don't
3589 use bfd_get_section_by_name, because if we link together
3590 nonloadable .note sections and loadable .note sections, we will
3591 generate two .note sections in the output file. FIXME: Using
3592 names for section types is bogus anyhow. */
3593 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3595 if ((s
->flags
& SEC_LOAD
) != 0
3596 && strncmp (s
->name
, ".note", 5) == 0)
3598 amt
= sizeof (struct elf_segment_map
);
3599 m
= bfd_zalloc (abfd
, amt
);
3603 m
->p_type
= PT_NOTE
;
3610 if (s
->flags
& SEC_THREAD_LOCAL
)
3618 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3623 amt
= sizeof (struct elf_segment_map
);
3624 amt
+= (tls_count
- 1) * sizeof (asection
*);
3625 m
= bfd_zalloc (abfd
, amt
);
3630 m
->count
= tls_count
;
3631 /* Mandated PF_R. */
3633 m
->p_flags_valid
= 1;
3634 for (i
= 0; i
< tls_count
; ++i
)
3636 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3637 m
->sections
[i
] = first_tls
;
3638 first_tls
= first_tls
->next
;
3645 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3647 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3648 if (eh_frame_hdr
!= NULL
3649 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3651 amt
= sizeof (struct elf_segment_map
);
3652 m
= bfd_zalloc (abfd
, amt
);
3656 m
->p_type
= PT_GNU_EH_FRAME
;
3658 m
->sections
[0] = eh_frame_hdr
->output_section
;
3664 if (elf_tdata (abfd
)->stack_flags
)
3666 amt
= sizeof (struct elf_segment_map
);
3667 m
= bfd_zalloc (abfd
, amt
);
3671 m
->p_type
= PT_GNU_STACK
;
3672 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3673 m
->p_flags_valid
= 1;
3679 if (elf_tdata (abfd
)->relro
)
3681 amt
= sizeof (struct elf_segment_map
);
3682 m
= bfd_zalloc (abfd
, amt
);
3686 m
->p_type
= PT_GNU_RELRO
;
3688 m
->p_flags_valid
= 1;
3697 elf_tdata (abfd
)->segment_map
= mfirst
;
3701 if (sections
!= NULL
)
3706 /* Sort sections by address. */
3709 elf_sort_sections (const void *arg1
, const void *arg2
)
3711 const asection
*sec1
= *(const asection
**) arg1
;
3712 const asection
*sec2
= *(const asection
**) arg2
;
3713 bfd_size_type size1
, size2
;
3715 /* Sort by LMA first, since this is the address used to
3716 place the section into a segment. */
3717 if (sec1
->lma
< sec2
->lma
)
3719 else if (sec1
->lma
> sec2
->lma
)
3722 /* Then sort by VMA. Normally the LMA and the VMA will be
3723 the same, and this will do nothing. */
3724 if (sec1
->vma
< sec2
->vma
)
3726 else if (sec1
->vma
> sec2
->vma
)
3729 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3731 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3737 /* If the indicies are the same, do not return 0
3738 here, but continue to try the next comparison. */
3739 if (sec1
->target_index
- sec2
->target_index
!= 0)
3740 return sec1
->target_index
- sec2
->target_index
;
3745 else if (TOEND (sec2
))
3750 /* Sort by size, to put zero sized sections
3751 before others at the same address. */
3753 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3754 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3761 return sec1
->target_index
- sec2
->target_index
;
3764 /* Ian Lance Taylor writes:
3766 We shouldn't be using % with a negative signed number. That's just
3767 not good. We have to make sure either that the number is not
3768 negative, or that the number has an unsigned type. When the types
3769 are all the same size they wind up as unsigned. When file_ptr is a
3770 larger signed type, the arithmetic winds up as signed long long,
3773 What we're trying to say here is something like ``increase OFF by
3774 the least amount that will cause it to be equal to the VMA modulo
3776 /* In other words, something like:
3778 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3779 off_offset = off % bed->maxpagesize;
3780 if (vma_offset < off_offset)
3781 adjustment = vma_offset + bed->maxpagesize - off_offset;
3783 adjustment = vma_offset - off_offset;
3785 which can can be collapsed into the expression below. */
3788 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3790 return ((vma
- off
) % maxpagesize
);
3793 /* Assign file positions to the sections based on the mapping from
3794 sections to segments. This function also sets up some fields in
3795 the file header, and writes out the program headers. */
3798 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3800 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3802 struct elf_segment_map
*m
;
3804 Elf_Internal_Phdr
*phdrs
;
3806 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3807 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3808 Elf_Internal_Phdr
*p
;
3811 if (elf_tdata (abfd
)->segment_map
== NULL
)
3813 if (! map_sections_to_segments (abfd
))
3818 /* The placement algorithm assumes that non allocated sections are
3819 not in PT_LOAD segments. We ensure this here by removing such
3820 sections from the segment map. */
3821 for (m
= elf_tdata (abfd
)->segment_map
;
3825 unsigned int new_count
;
3828 if (m
->p_type
!= PT_LOAD
)
3832 for (i
= 0; i
< m
->count
; i
++)
3834 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3837 m
->sections
[new_count
] = m
->sections
[i
];
3843 if (new_count
!= m
->count
)
3844 m
->count
= new_count
;
3848 if (bed
->elf_backend_modify_segment_map
)
3850 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3855 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3858 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3859 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3860 elf_elfheader (abfd
)->e_phnum
= count
;
3865 /* If we already counted the number of program segments, make sure
3866 that we allocated enough space. This happens when SIZEOF_HEADERS
3867 is used in a linker script. */
3868 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3869 if (alloc
!= 0 && count
> alloc
)
3871 ((*_bfd_error_handler
)
3872 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3873 bfd_get_filename (abfd
), alloc
, count
));
3874 bfd_set_error (bfd_error_bad_value
);
3881 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3882 phdrs
= bfd_alloc (abfd
, amt
);
3886 off
= bed
->s
->sizeof_ehdr
;
3887 off
+= alloc
* bed
->s
->sizeof_phdr
;
3894 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3901 /* If elf_segment_map is not from map_sections_to_segments, the
3902 sections may not be correctly ordered. NOTE: sorting should
3903 not be done to the PT_NOTE section of a corefile, which may
3904 contain several pseudo-sections artificially created by bfd.
3905 Sorting these pseudo-sections breaks things badly. */
3907 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3908 && m
->p_type
== PT_NOTE
))
3909 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3912 p
->p_type
= m
->p_type
;
3913 p
->p_flags
= m
->p_flags
;
3915 if (p
->p_type
== PT_LOAD
3917 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3919 if ((abfd
->flags
& D_PAGED
) != 0)
3920 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3924 bfd_size_type align
;
3927 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3929 bfd_size_type secalign
;
3931 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3932 if (secalign
> align
)
3936 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3940 /* Make sure the .dynamic section is the first section in the
3941 PT_DYNAMIC segment. */
3942 else if (p
->p_type
== PT_DYNAMIC
3944 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
3947 (_("%s: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
3948 bfd_get_filename (abfd
));
3949 bfd_set_error (bfd_error_bad_value
);
3956 p
->p_vaddr
= m
->sections
[0]->vma
;
3958 if (m
->p_paddr_valid
)
3959 p
->p_paddr
= m
->p_paddr
;
3960 else if (m
->count
== 0)
3963 p
->p_paddr
= m
->sections
[0]->lma
;
3965 if (p
->p_type
== PT_LOAD
3966 && (abfd
->flags
& D_PAGED
) != 0)
3967 p
->p_align
= bed
->maxpagesize
;
3968 else if (m
->count
== 0)
3969 p
->p_align
= 1 << bed
->s
->log_file_align
;
3977 if (m
->includes_filehdr
)
3979 if (! m
->p_flags_valid
)
3982 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3983 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3986 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3988 if (p
->p_vaddr
< (bfd_vma
) off
)
3990 (*_bfd_error_handler
)
3991 (_("%s: Not enough room for program headers, try linking with -N"),
3992 bfd_get_filename (abfd
));
3993 bfd_set_error (bfd_error_bad_value
);
3998 if (! m
->p_paddr_valid
)
4001 if (p
->p_type
== PT_LOAD
)
4003 filehdr_vaddr
= p
->p_vaddr
;
4004 filehdr_paddr
= p
->p_paddr
;
4008 if (m
->includes_phdrs
)
4010 if (! m
->p_flags_valid
)
4013 if (m
->includes_filehdr
)
4015 if (p
->p_type
== PT_LOAD
)
4017 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4018 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4023 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4027 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4028 p
->p_vaddr
-= off
- p
->p_offset
;
4029 if (! m
->p_paddr_valid
)
4030 p
->p_paddr
-= off
- p
->p_offset
;
4033 if (p
->p_type
== PT_LOAD
)
4035 phdrs_vaddr
= p
->p_vaddr
;
4036 phdrs_paddr
= p
->p_paddr
;
4039 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4042 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4043 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4046 if (p
->p_type
== PT_LOAD
4047 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4049 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4055 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4056 p
->p_filesz
+= adjust
;
4057 p
->p_memsz
+= adjust
;
4063 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4067 bfd_size_type align
;
4071 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4073 /* The section may have artificial alignment forced by a
4074 link script. Notice this case by the gap between the
4075 cumulative phdr lma and the section's lma. */
4076 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
4078 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4080 p
->p_memsz
+= adjust
;
4081 if (p
->p_type
== PT_LOAD
4082 || (p
->p_type
== PT_NOTE
4083 && bfd_get_format (abfd
) == bfd_core
))
4088 if ((flags
& SEC_LOAD
) != 0
4089 || (flags
& SEC_THREAD_LOCAL
) != 0)
4090 p
->p_filesz
+= adjust
;
4093 if (p
->p_type
== PT_LOAD
)
4095 bfd_signed_vma adjust
;
4097 if ((flags
& SEC_LOAD
) != 0)
4099 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4103 else if ((flags
& SEC_ALLOC
) != 0)
4105 /* The section VMA must equal the file position
4106 modulo the page size. FIXME: I'm not sure if
4107 this adjustment is really necessary. We used to
4108 not have the SEC_LOAD case just above, and then
4109 this was necessary, but now I'm not sure. */
4110 if ((abfd
->flags
& D_PAGED
) != 0)
4111 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4114 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4124 (* _bfd_error_handler
) (_("\
4125 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4126 bfd_section_name (abfd
, sec
),
4131 p
->p_memsz
+= adjust
;
4134 if ((flags
& SEC_LOAD
) != 0)
4135 p
->p_filesz
+= adjust
;
4140 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4141 used in a linker script we may have a section with
4142 SEC_LOAD clear but which is supposed to have
4144 if ((flags
& SEC_LOAD
) != 0
4145 || (flags
& SEC_HAS_CONTENTS
) != 0)
4148 if ((flags
& SEC_ALLOC
) != 0
4149 && ((flags
& SEC_LOAD
) != 0
4150 || (flags
& SEC_THREAD_LOCAL
) == 0))
4154 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4156 /* The actual "note" segment has i == 0.
4157 This is the one that actually contains everything. */
4161 p
->p_filesz
= sec
->size
;
4167 /* Fake sections -- don't need to be written. */
4170 flags
= sec
->flags
= 0;
4177 if ((sec
->flags
& SEC_LOAD
) != 0
4178 || (sec
->flags
& SEC_THREAD_LOCAL
) == 0
4179 || p
->p_type
== PT_TLS
)
4180 p
->p_memsz
+= sec
->size
;
4182 if ((flags
& SEC_LOAD
) != 0)
4183 p
->p_filesz
+= sec
->size
;
4185 if (p
->p_type
== PT_TLS
4187 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4189 struct bfd_link_order
*o
;
4190 bfd_vma tbss_size
= 0;
4192 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4193 if (tbss_size
< o
->offset
+ o
->size
)
4194 tbss_size
= o
->offset
+ o
->size
;
4196 p
->p_memsz
+= tbss_size
;
4199 if (align
> p
->p_align
4200 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4204 if (! m
->p_flags_valid
)
4207 if ((flags
& SEC_CODE
) != 0)
4209 if ((flags
& SEC_READONLY
) == 0)
4215 /* Now that we have set the section file positions, we can set up
4216 the file positions for the non PT_LOAD segments. */
4217 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4221 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4223 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4224 p
->p_offset
= m
->sections
[0]->filepos
;
4228 if (m
->includes_filehdr
)
4230 p
->p_vaddr
= filehdr_vaddr
;
4231 if (! m
->p_paddr_valid
)
4232 p
->p_paddr
= filehdr_paddr
;
4234 else if (m
->includes_phdrs
)
4236 p
->p_vaddr
= phdrs_vaddr
;
4237 if (! m
->p_paddr_valid
)
4238 p
->p_paddr
= phdrs_paddr
;
4240 else if (p
->p_type
== PT_GNU_RELRO
)
4242 Elf_Internal_Phdr
*lp
;
4244 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4246 if (lp
->p_type
== PT_LOAD
4247 && lp
->p_vaddr
<= link_info
->relro_end
4248 && lp
->p_vaddr
>= link_info
->relro_start
4249 && lp
->p_vaddr
+ lp
->p_filesz
4250 >= link_info
->relro_end
)
4254 if (lp
< phdrs
+ count
4255 && link_info
->relro_end
> lp
->p_vaddr
)
4257 p
->p_vaddr
= lp
->p_vaddr
;
4258 p
->p_paddr
= lp
->p_paddr
;
4259 p
->p_offset
= lp
->p_offset
;
4260 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4261 p
->p_memsz
= p
->p_filesz
;
4263 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4267 memset (p
, 0, sizeof *p
);
4268 p
->p_type
= PT_NULL
;
4274 /* Clear out any program headers we allocated but did not use. */
4275 for (; count
< alloc
; count
++, p
++)
4277 memset (p
, 0, sizeof *p
);
4278 p
->p_type
= PT_NULL
;
4281 elf_tdata (abfd
)->phdr
= phdrs
;
4283 elf_tdata (abfd
)->next_file_pos
= off
;
4285 /* Write out the program headers. */
4286 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4287 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4293 /* Get the size of the program header.
4295 If this is called by the linker before any of the section VMA's are set, it
4296 can't calculate the correct value for a strange memory layout. This only
4297 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4298 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4299 data segment (exclusive of .interp and .dynamic).
4301 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4302 will be two segments. */
4304 static bfd_size_type
4305 get_program_header_size (bfd
*abfd
)
4309 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4311 /* We can't return a different result each time we're called. */
4312 if (elf_tdata (abfd
)->program_header_size
!= 0)
4313 return elf_tdata (abfd
)->program_header_size
;
4315 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4317 struct elf_segment_map
*m
;
4320 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4322 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4323 return elf_tdata (abfd
)->program_header_size
;
4326 /* Assume we will need exactly two PT_LOAD segments: one for text
4327 and one for data. */
4330 s
= bfd_get_section_by_name (abfd
, ".interp");
4331 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4333 /* If we have a loadable interpreter section, we need a
4334 PT_INTERP segment. In this case, assume we also need a
4335 PT_PHDR segment, although that may not be true for all
4340 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4342 /* We need a PT_DYNAMIC segment. */
4346 if (elf_tdata (abfd
)->eh_frame_hdr
)
4348 /* We need a PT_GNU_EH_FRAME segment. */
4352 if (elf_tdata (abfd
)->stack_flags
)
4354 /* We need a PT_GNU_STACK segment. */
4358 if (elf_tdata (abfd
)->relro
)
4360 /* We need a PT_GNU_RELRO segment. */
4364 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4366 if ((s
->flags
& SEC_LOAD
) != 0
4367 && strncmp (s
->name
, ".note", 5) == 0)
4369 /* We need a PT_NOTE segment. */
4374 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4376 if (s
->flags
& SEC_THREAD_LOCAL
)
4378 /* We need a PT_TLS segment. */
4384 /* Let the backend count up any program headers it might need. */
4385 if (bed
->elf_backend_additional_program_headers
)
4389 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4395 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4396 return elf_tdata (abfd
)->program_header_size
;
4399 /* Work out the file positions of all the sections. This is called by
4400 _bfd_elf_compute_section_file_positions. All the section sizes and
4401 VMAs must be known before this is called.
4403 We do not consider reloc sections at this point, unless they form
4404 part of the loadable image. Reloc sections are assigned file
4405 positions in assign_file_positions_for_relocs, which is called by
4406 write_object_contents and final_link.
4408 We also don't set the positions of the .symtab and .strtab here. */
4411 assign_file_positions_except_relocs (bfd
*abfd
,
4412 struct bfd_link_info
*link_info
)
4414 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4415 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4416 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4417 unsigned int num_sec
= elf_numsections (abfd
);
4419 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4421 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4422 && bfd_get_format (abfd
) != bfd_core
)
4424 Elf_Internal_Shdr
**hdrpp
;
4427 /* Start after the ELF header. */
4428 off
= i_ehdrp
->e_ehsize
;
4430 /* We are not creating an executable, which means that we are
4431 not creating a program header, and that the actual order of
4432 the sections in the file is unimportant. */
4433 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4435 Elf_Internal_Shdr
*hdr
;
4438 if (hdr
->sh_type
== SHT_REL
4439 || hdr
->sh_type
== SHT_RELA
4440 || i
== tdata
->symtab_section
4441 || i
== tdata
->symtab_shndx_section
4442 || i
== tdata
->strtab_section
)
4444 hdr
->sh_offset
= -1;
4447 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4449 if (i
== SHN_LORESERVE
- 1)
4451 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4452 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4459 Elf_Internal_Shdr
**hdrpp
;
4461 /* Assign file positions for the loaded sections based on the
4462 assignment of sections to segments. */
4463 if (! assign_file_positions_for_segments (abfd
, link_info
))
4466 /* Assign file positions for the other sections. */
4468 off
= elf_tdata (abfd
)->next_file_pos
;
4469 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4471 Elf_Internal_Shdr
*hdr
;
4474 if (hdr
->bfd_section
!= NULL
4475 && hdr
->bfd_section
->filepos
!= 0)
4476 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4477 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4479 ((*_bfd_error_handler
)
4480 (_("%s: warning: allocated section `%s' not in segment"),
4481 bfd_get_filename (abfd
),
4482 (hdr
->bfd_section
== NULL
4484 : hdr
->bfd_section
->name
)));
4485 if ((abfd
->flags
& D_PAGED
) != 0)
4486 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4489 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4491 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4494 else if (hdr
->sh_type
== SHT_REL
4495 || hdr
->sh_type
== SHT_RELA
4496 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4497 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4498 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4499 hdr
->sh_offset
= -1;
4501 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4503 if (i
== SHN_LORESERVE
- 1)
4505 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4506 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4511 /* Place the section headers. */
4512 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4513 i_ehdrp
->e_shoff
= off
;
4514 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4516 elf_tdata (abfd
)->next_file_pos
= off
;
4522 prep_headers (bfd
*abfd
)
4524 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4525 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4526 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4527 struct elf_strtab_hash
*shstrtab
;
4528 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4530 i_ehdrp
= elf_elfheader (abfd
);
4531 i_shdrp
= elf_elfsections (abfd
);
4533 shstrtab
= _bfd_elf_strtab_init ();
4534 if (shstrtab
== NULL
)
4537 elf_shstrtab (abfd
) = shstrtab
;
4539 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4540 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4541 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4542 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4544 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4545 i_ehdrp
->e_ident
[EI_DATA
] =
4546 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4547 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4549 if ((abfd
->flags
& DYNAMIC
) != 0)
4550 i_ehdrp
->e_type
= ET_DYN
;
4551 else if ((abfd
->flags
& EXEC_P
) != 0)
4552 i_ehdrp
->e_type
= ET_EXEC
;
4553 else if (bfd_get_format (abfd
) == bfd_core
)
4554 i_ehdrp
->e_type
= ET_CORE
;
4556 i_ehdrp
->e_type
= ET_REL
;
4558 switch (bfd_get_arch (abfd
))
4560 case bfd_arch_unknown
:
4561 i_ehdrp
->e_machine
= EM_NONE
;
4564 /* There used to be a long list of cases here, each one setting
4565 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4566 in the corresponding bfd definition. To avoid duplication,
4567 the switch was removed. Machines that need special handling
4568 can generally do it in elf_backend_final_write_processing(),
4569 unless they need the information earlier than the final write.
4570 Such need can generally be supplied by replacing the tests for
4571 e_machine with the conditions used to determine it. */
4573 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4576 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4577 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4579 /* No program header, for now. */
4580 i_ehdrp
->e_phoff
= 0;
4581 i_ehdrp
->e_phentsize
= 0;
4582 i_ehdrp
->e_phnum
= 0;
4584 /* Each bfd section is section header entry. */
4585 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4586 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4588 /* If we're building an executable, we'll need a program header table. */
4589 if (abfd
->flags
& EXEC_P
)
4591 /* It all happens later. */
4593 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4595 /* elf_build_phdrs() returns a (NULL-terminated) array of
4596 Elf_Internal_Phdrs. */
4597 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4598 i_ehdrp
->e_phoff
= outbase
;
4599 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4604 i_ehdrp
->e_phentsize
= 0;
4606 i_ehdrp
->e_phoff
= 0;
4609 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4610 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4611 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4612 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4613 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4614 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4615 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4616 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4617 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4623 /* Assign file positions for all the reloc sections which are not part
4624 of the loadable file image. */
4627 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4630 unsigned int i
, num_sec
;
4631 Elf_Internal_Shdr
**shdrpp
;
4633 off
= elf_tdata (abfd
)->next_file_pos
;
4635 num_sec
= elf_numsections (abfd
);
4636 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4638 Elf_Internal_Shdr
*shdrp
;
4641 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4642 && shdrp
->sh_offset
== -1)
4643 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4646 elf_tdata (abfd
)->next_file_pos
= off
;
4650 _bfd_elf_write_object_contents (bfd
*abfd
)
4652 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4653 Elf_Internal_Ehdr
*i_ehdrp
;
4654 Elf_Internal_Shdr
**i_shdrp
;
4656 unsigned int count
, num_sec
;
4658 if (! abfd
->output_has_begun
4659 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4662 i_shdrp
= elf_elfsections (abfd
);
4663 i_ehdrp
= elf_elfheader (abfd
);
4666 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4670 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4672 /* After writing the headers, we need to write the sections too... */
4673 num_sec
= elf_numsections (abfd
);
4674 for (count
= 1; count
< num_sec
; count
++)
4676 if (bed
->elf_backend_section_processing
)
4677 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4678 if (i_shdrp
[count
]->contents
)
4680 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4682 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4683 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4686 if (count
== SHN_LORESERVE
- 1)
4687 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4690 /* Write out the section header names. */
4691 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4692 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4695 if (bed
->elf_backend_final_write_processing
)
4696 (*bed
->elf_backend_final_write_processing
) (abfd
,
4697 elf_tdata (abfd
)->linker
);
4699 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4703 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4705 /* Hopefully this can be done just like an object file. */
4706 return _bfd_elf_write_object_contents (abfd
);
4709 /* Given a section, search the header to find them. */
4712 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4714 const struct elf_backend_data
*bed
;
4717 if (elf_section_data (asect
) != NULL
4718 && elf_section_data (asect
)->this_idx
!= 0)
4719 return elf_section_data (asect
)->this_idx
;
4721 if (bfd_is_abs_section (asect
))
4723 else if (bfd_is_com_section (asect
))
4725 else if (bfd_is_und_section (asect
))
4729 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4730 int maxindex
= elf_numsections (abfd
);
4732 for (index
= 1; index
< maxindex
; index
++)
4734 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4736 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4742 bed
= get_elf_backend_data (abfd
);
4743 if (bed
->elf_backend_section_from_bfd_section
)
4747 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4752 bfd_set_error (bfd_error_nonrepresentable_section
);
4757 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4761 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4763 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4765 flagword flags
= asym_ptr
->flags
;
4767 /* When gas creates relocations against local labels, it creates its
4768 own symbol for the section, but does put the symbol into the
4769 symbol chain, so udata is 0. When the linker is generating
4770 relocatable output, this section symbol may be for one of the
4771 input sections rather than the output section. */
4772 if (asym_ptr
->udata
.i
== 0
4773 && (flags
& BSF_SECTION_SYM
)
4774 && asym_ptr
->section
)
4778 if (asym_ptr
->section
->output_section
!= NULL
)
4779 indx
= asym_ptr
->section
->output_section
->index
;
4781 indx
= asym_ptr
->section
->index
;
4782 if (indx
< elf_num_section_syms (abfd
)
4783 && elf_section_syms (abfd
)[indx
] != NULL
)
4784 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4787 idx
= asym_ptr
->udata
.i
;
4791 /* This case can occur when using --strip-symbol on a symbol
4792 which is used in a relocation entry. */
4793 (*_bfd_error_handler
)
4794 (_("%s: symbol `%s' required but not present"),
4795 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4796 bfd_set_error (bfd_error_no_symbols
);
4803 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4804 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4805 elf_symbol_flags (flags
));
4813 /* Copy private BFD data. This copies any program header information. */
4816 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4818 Elf_Internal_Ehdr
*iehdr
;
4819 struct elf_segment_map
*map
;
4820 struct elf_segment_map
*map_first
;
4821 struct elf_segment_map
**pointer_to_map
;
4822 Elf_Internal_Phdr
*segment
;
4825 unsigned int num_segments
;
4826 bfd_boolean phdr_included
= FALSE
;
4827 bfd_vma maxpagesize
;
4828 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4829 unsigned int phdr_adjust_num
= 0;
4830 const struct elf_backend_data
*bed
;
4832 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4833 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4836 if (elf_tdata (ibfd
)->phdr
== NULL
)
4839 bed
= get_elf_backend_data (ibfd
);
4840 iehdr
= elf_elfheader (ibfd
);
4843 pointer_to_map
= &map_first
;
4845 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4846 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4848 /* Returns the end address of the segment + 1. */
4849 #define SEGMENT_END(segment, start) \
4850 (start + (segment->p_memsz > segment->p_filesz \
4851 ? segment->p_memsz : segment->p_filesz))
4853 #define SECTION_SIZE(section, segment) \
4854 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4855 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4856 ? section->size : 0)
4858 /* Returns TRUE if the given section is contained within
4859 the given segment. VMA addresses are compared. */
4860 #define IS_CONTAINED_BY_VMA(section, segment) \
4861 (section->vma >= segment->p_vaddr \
4862 && (section->vma + SECTION_SIZE (section, segment) \
4863 <= (SEGMENT_END (segment, segment->p_vaddr))))
4865 /* Returns TRUE if the given section is contained within
4866 the given segment. LMA addresses are compared. */
4867 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4868 (section->lma >= base \
4869 && (section->lma + SECTION_SIZE (section, segment) \
4870 <= SEGMENT_END (segment, base)))
4872 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4873 #define IS_COREFILE_NOTE(p, s) \
4874 (p->p_type == PT_NOTE \
4875 && bfd_get_format (ibfd) == bfd_core \
4876 && s->vma == 0 && s->lma == 0 \
4877 && (bfd_vma) s->filepos >= p->p_offset \
4878 && ((bfd_vma) s->filepos + s->size \
4879 <= p->p_offset + p->p_filesz))
4881 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4882 linker, which generates a PT_INTERP section with p_vaddr and
4883 p_memsz set to 0. */
4884 #define IS_SOLARIS_PT_INTERP(p, s) \
4886 && p->p_paddr == 0 \
4887 && p->p_memsz == 0 \
4888 && p->p_filesz > 0 \
4889 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4891 && (bfd_vma) s->filepos >= p->p_offset \
4892 && ((bfd_vma) s->filepos + s->size \
4893 <= p->p_offset + p->p_filesz))
4895 /* Decide if the given section should be included in the given segment.
4896 A section will be included if:
4897 1. It is within the address space of the segment -- we use the LMA
4898 if that is set for the segment and the VMA otherwise,
4899 2. It is an allocated segment,
4900 3. There is an output section associated with it,
4901 4. The section has not already been allocated to a previous segment.
4902 5. PT_GNU_STACK segments do not include any sections.
4903 6. PT_TLS segment includes only SHF_TLS sections.
4904 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4905 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4906 ((((segment->p_paddr \
4907 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4908 : IS_CONTAINED_BY_VMA (section, segment)) \
4909 && (section->flags & SEC_ALLOC) != 0) \
4910 || IS_COREFILE_NOTE (segment, section)) \
4911 && section->output_section != NULL \
4912 && segment->p_type != PT_GNU_STACK \
4913 && (segment->p_type != PT_TLS \
4914 || (section->flags & SEC_THREAD_LOCAL)) \
4915 && (segment->p_type == PT_LOAD \
4916 || segment->p_type == PT_TLS \
4917 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4918 && ! section->segment_mark)
4920 /* Returns TRUE iff seg1 starts after the end of seg2. */
4921 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4922 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4924 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4925 their VMA address ranges and their LMA address ranges overlap.
4926 It is possible to have overlapping VMA ranges without overlapping LMA
4927 ranges. RedBoot images for example can have both .data and .bss mapped
4928 to the same VMA range, but with the .data section mapped to a different
4930 #define SEGMENT_OVERLAPS(seg1, seg2) \
4931 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4932 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4933 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4934 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4936 /* Initialise the segment mark field. */
4937 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4938 section
->segment_mark
= FALSE
;
4940 /* Scan through the segments specified in the program header
4941 of the input BFD. For this first scan we look for overlaps
4942 in the loadable segments. These can be created by weird
4943 parameters to objcopy. Also, fix some solaris weirdness. */
4944 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4949 Elf_Internal_Phdr
*segment2
;
4951 if (segment
->p_type
== PT_INTERP
)
4952 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4953 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4955 /* Mininal change so that the normal section to segment
4956 assignment code will work. */
4957 segment
->p_vaddr
= section
->vma
;
4961 if (segment
->p_type
!= PT_LOAD
)
4964 /* Determine if this segment overlaps any previous segments. */
4965 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4967 bfd_signed_vma extra_length
;
4969 if (segment2
->p_type
!= PT_LOAD
4970 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4973 /* Merge the two segments together. */
4974 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4976 /* Extend SEGMENT2 to include SEGMENT and then delete
4979 SEGMENT_END (segment
, segment
->p_vaddr
)
4980 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4982 if (extra_length
> 0)
4984 segment2
->p_memsz
+= extra_length
;
4985 segment2
->p_filesz
+= extra_length
;
4988 segment
->p_type
= PT_NULL
;
4990 /* Since we have deleted P we must restart the outer loop. */
4992 segment
= elf_tdata (ibfd
)->phdr
;
4997 /* Extend SEGMENT to include SEGMENT2 and then delete
5000 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5001 - SEGMENT_END (segment
, segment
->p_vaddr
);
5003 if (extra_length
> 0)
5005 segment
->p_memsz
+= extra_length
;
5006 segment
->p_filesz
+= extra_length
;
5009 segment2
->p_type
= PT_NULL
;
5014 /* The second scan attempts to assign sections to segments. */
5015 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5019 unsigned int section_count
;
5020 asection
** sections
;
5021 asection
* output_section
;
5023 bfd_vma matching_lma
;
5024 bfd_vma suggested_lma
;
5028 if (segment
->p_type
== PT_NULL
)
5031 /* Compute how many sections might be placed into this segment. */
5032 for (section
= ibfd
->sections
, section_count
= 0;
5034 section
= section
->next
)
5035 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5038 /* Allocate a segment map big enough to contain
5039 all of the sections we have selected. */
5040 amt
= sizeof (struct elf_segment_map
);
5041 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5042 map
= bfd_alloc (obfd
, amt
);
5046 /* Initialise the fields of the segment map. Default to
5047 using the physical address of the segment in the input BFD. */
5049 map
->p_type
= segment
->p_type
;
5050 map
->p_flags
= segment
->p_flags
;
5051 map
->p_flags_valid
= 1;
5052 map
->p_paddr
= segment
->p_paddr
;
5053 map
->p_paddr_valid
= 1;
5055 /* Determine if this segment contains the ELF file header
5056 and if it contains the program headers themselves. */
5057 map
->includes_filehdr
= (segment
->p_offset
== 0
5058 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5060 map
->includes_phdrs
= 0;
5062 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5064 map
->includes_phdrs
=
5065 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5066 && (segment
->p_offset
+ segment
->p_filesz
5067 >= ((bfd_vma
) iehdr
->e_phoff
5068 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5070 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5071 phdr_included
= TRUE
;
5074 if (section_count
== 0)
5076 /* Special segments, such as the PT_PHDR segment, may contain
5077 no sections, but ordinary, loadable segments should contain
5078 something. They are allowed by the ELF spec however, so only
5079 a warning is produced. */
5080 if (segment
->p_type
== PT_LOAD
)
5081 (*_bfd_error_handler
)
5082 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
5083 bfd_archive_filename (ibfd
));
5086 *pointer_to_map
= map
;
5087 pointer_to_map
= &map
->next
;
5092 /* Now scan the sections in the input BFD again and attempt
5093 to add their corresponding output sections to the segment map.
5094 The problem here is how to handle an output section which has
5095 been moved (ie had its LMA changed). There are four possibilities:
5097 1. None of the sections have been moved.
5098 In this case we can continue to use the segment LMA from the
5101 2. All of the sections have been moved by the same amount.
5102 In this case we can change the segment's LMA to match the LMA
5103 of the first section.
5105 3. Some of the sections have been moved, others have not.
5106 In this case those sections which have not been moved can be
5107 placed in the current segment which will have to have its size,
5108 and possibly its LMA changed, and a new segment or segments will
5109 have to be created to contain the other sections.
5111 4. The sections have been moved, but not by the same amount.
5112 In this case we can change the segment's LMA to match the LMA
5113 of the first section and we will have to create a new segment
5114 or segments to contain the other sections.
5116 In order to save time, we allocate an array to hold the section
5117 pointers that we are interested in. As these sections get assigned
5118 to a segment, they are removed from this array. */
5120 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5121 to work around this long long bug. */
5122 amt
= section_count
* sizeof (asection
*);
5123 sections
= bfd_malloc (amt
);
5124 if (sections
== NULL
)
5127 /* Step One: Scan for segment vs section LMA conflicts.
5128 Also add the sections to the section array allocated above.
5129 Also add the sections to the current segment. In the common
5130 case, where the sections have not been moved, this means that
5131 we have completely filled the segment, and there is nothing
5137 for (j
= 0, section
= ibfd
->sections
;
5139 section
= section
->next
)
5141 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5143 output_section
= section
->output_section
;
5145 sections
[j
++] = section
;
5147 /* The Solaris native linker always sets p_paddr to 0.
5148 We try to catch that case here, and set it to the
5149 correct value. Note - some backends require that
5150 p_paddr be left as zero. */
5151 if (segment
->p_paddr
== 0
5152 && segment
->p_vaddr
!= 0
5153 && (! bed
->want_p_paddr_set_to_zero
)
5155 && output_section
->lma
!= 0
5156 && (output_section
->vma
== (segment
->p_vaddr
5157 + (map
->includes_filehdr
5160 + (map
->includes_phdrs
5162 * iehdr
->e_phentsize
)
5164 map
->p_paddr
= segment
->p_vaddr
;
5166 /* Match up the physical address of the segment with the
5167 LMA address of the output section. */
5168 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5169 || IS_COREFILE_NOTE (segment
, section
)
5170 || (bed
->want_p_paddr_set_to_zero
&&
5171 IS_CONTAINED_BY_VMA (output_section
, segment
))
5174 if (matching_lma
== 0)
5175 matching_lma
= output_section
->lma
;
5177 /* We assume that if the section fits within the segment
5178 then it does not overlap any other section within that
5180 map
->sections
[isec
++] = output_section
;
5182 else if (suggested_lma
== 0)
5183 suggested_lma
= output_section
->lma
;
5187 BFD_ASSERT (j
== section_count
);
5189 /* Step Two: Adjust the physical address of the current segment,
5191 if (isec
== section_count
)
5193 /* All of the sections fitted within the segment as currently
5194 specified. This is the default case. Add the segment to
5195 the list of built segments and carry on to process the next
5196 program header in the input BFD. */
5197 map
->count
= section_count
;
5198 *pointer_to_map
= map
;
5199 pointer_to_map
= &map
->next
;
5206 if (matching_lma
!= 0)
5208 /* At least one section fits inside the current segment.
5209 Keep it, but modify its physical address to match the
5210 LMA of the first section that fitted. */
5211 map
->p_paddr
= matching_lma
;
5215 /* None of the sections fitted inside the current segment.
5216 Change the current segment's physical address to match
5217 the LMA of the first section. */
5218 map
->p_paddr
= suggested_lma
;
5221 /* Offset the segment physical address from the lma
5222 to allow for space taken up by elf headers. */
5223 if (map
->includes_filehdr
)
5224 map
->p_paddr
-= iehdr
->e_ehsize
;
5226 if (map
->includes_phdrs
)
5228 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5230 /* iehdr->e_phnum is just an estimate of the number
5231 of program headers that we will need. Make a note
5232 here of the number we used and the segment we chose
5233 to hold these headers, so that we can adjust the
5234 offset when we know the correct value. */
5235 phdr_adjust_num
= iehdr
->e_phnum
;
5236 phdr_adjust_seg
= map
;
5240 /* Step Three: Loop over the sections again, this time assigning
5241 those that fit to the current segment and removing them from the
5242 sections array; but making sure not to leave large gaps. Once all
5243 possible sections have been assigned to the current segment it is
5244 added to the list of built segments and if sections still remain
5245 to be assigned, a new segment is constructed before repeating
5253 /* Fill the current segment with sections that fit. */
5254 for (j
= 0; j
< section_count
; j
++)
5256 section
= sections
[j
];
5258 if (section
== NULL
)
5261 output_section
= section
->output_section
;
5263 BFD_ASSERT (output_section
!= NULL
);
5265 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5266 || IS_COREFILE_NOTE (segment
, section
))
5268 if (map
->count
== 0)
5270 /* If the first section in a segment does not start at
5271 the beginning of the segment, then something is
5273 if (output_section
->lma
!=
5275 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5276 + (map
->includes_phdrs
5277 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5283 asection
* prev_sec
;
5285 prev_sec
= map
->sections
[map
->count
- 1];
5287 /* If the gap between the end of the previous section
5288 and the start of this section is more than
5289 maxpagesize then we need to start a new segment. */
5290 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5292 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5293 || ((prev_sec
->lma
+ prev_sec
->size
)
5294 > output_section
->lma
))
5296 if (suggested_lma
== 0)
5297 suggested_lma
= output_section
->lma
;
5303 map
->sections
[map
->count
++] = output_section
;
5306 section
->segment_mark
= TRUE
;
5308 else if (suggested_lma
== 0)
5309 suggested_lma
= output_section
->lma
;
5312 BFD_ASSERT (map
->count
> 0);
5314 /* Add the current segment to the list of built segments. */
5315 *pointer_to_map
= map
;
5316 pointer_to_map
= &map
->next
;
5318 if (isec
< section_count
)
5320 /* We still have not allocated all of the sections to
5321 segments. Create a new segment here, initialise it
5322 and carry on looping. */
5323 amt
= sizeof (struct elf_segment_map
);
5324 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5325 map
= bfd_alloc (obfd
, amt
);
5332 /* Initialise the fields of the segment map. Set the physical
5333 physical address to the LMA of the first section that has
5334 not yet been assigned. */
5336 map
->p_type
= segment
->p_type
;
5337 map
->p_flags
= segment
->p_flags
;
5338 map
->p_flags_valid
= 1;
5339 map
->p_paddr
= suggested_lma
;
5340 map
->p_paddr_valid
= 1;
5341 map
->includes_filehdr
= 0;
5342 map
->includes_phdrs
= 0;
5345 while (isec
< section_count
);
5350 /* The Solaris linker creates program headers in which all the
5351 p_paddr fields are zero. When we try to objcopy or strip such a
5352 file, we get confused. Check for this case, and if we find it
5353 reset the p_paddr_valid fields. */
5354 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5355 if (map
->p_paddr
!= 0)
5358 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5359 map
->p_paddr_valid
= 0;
5361 elf_tdata (obfd
)->segment_map
= map_first
;
5363 /* If we had to estimate the number of program headers that were
5364 going to be needed, then check our estimate now and adjust
5365 the offset if necessary. */
5366 if (phdr_adjust_seg
!= NULL
)
5370 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5373 if (count
> phdr_adjust_num
)
5374 phdr_adjust_seg
->p_paddr
5375 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5379 /* Final Step: Sort the segments into ascending order of physical
5381 if (map_first
!= NULL
)
5383 struct elf_segment_map
*prev
;
5386 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5388 /* Yes I know - its a bubble sort.... */
5389 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5391 /* Swap map and map->next. */
5392 prev
->next
= map
->next
;
5393 map
->next
= map
->next
->next
;
5394 prev
->next
->next
= map
;
5405 #undef IS_CONTAINED_BY_VMA
5406 #undef IS_CONTAINED_BY_LMA
5407 #undef IS_COREFILE_NOTE
5408 #undef IS_SOLARIS_PT_INTERP
5409 #undef INCLUDE_SECTION_IN_SEGMENT
5410 #undef SEGMENT_AFTER_SEGMENT
5411 #undef SEGMENT_OVERLAPS
5415 /* Copy private section information. This copies over the entsize
5416 field, and sometimes the info field. */
5419 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5424 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5426 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5427 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5430 ihdr
= &elf_section_data (isec
)->this_hdr
;
5431 ohdr
= &elf_section_data (osec
)->this_hdr
;
5433 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5435 if (ihdr
->sh_type
== SHT_SYMTAB
5436 || ihdr
->sh_type
== SHT_DYNSYM
5437 || ihdr
->sh_type
== SHT_GNU_verneed
5438 || ihdr
->sh_type
== SHT_GNU_verdef
)
5439 ohdr
->sh_info
= ihdr
->sh_info
;
5441 /* Set things up for objcopy. The output SHT_GROUP section will
5442 have its elf_next_in_group pointing back to the input group
5444 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5445 elf_group_name (osec
) = elf_group_name (isec
);
5447 osec
->use_rela_p
= isec
->use_rela_p
;
5452 /* Copy private header information. */
5455 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5457 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5458 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5461 /* Copy over private BFD data if it has not already been copied.
5462 This must be done here, rather than in the copy_private_bfd_data
5463 entry point, because the latter is called after the section
5464 contents have been set, which means that the program headers have
5465 already been worked out. */
5466 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5468 if (! copy_private_bfd_data (ibfd
, obfd
))
5475 /* Copy private symbol information. If this symbol is in a section
5476 which we did not map into a BFD section, try to map the section
5477 index correctly. We use special macro definitions for the mapped
5478 section indices; these definitions are interpreted by the
5479 swap_out_syms function. */
5481 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5482 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5483 #define MAP_STRTAB (SHN_HIOS + 3)
5484 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5485 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5488 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5493 elf_symbol_type
*isym
, *osym
;
5495 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5496 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5499 isym
= elf_symbol_from (ibfd
, isymarg
);
5500 osym
= elf_symbol_from (obfd
, osymarg
);
5504 && bfd_is_abs_section (isym
->symbol
.section
))
5508 shndx
= isym
->internal_elf_sym
.st_shndx
;
5509 if (shndx
== elf_onesymtab (ibfd
))
5510 shndx
= MAP_ONESYMTAB
;
5511 else if (shndx
== elf_dynsymtab (ibfd
))
5512 shndx
= MAP_DYNSYMTAB
;
5513 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5515 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5516 shndx
= MAP_SHSTRTAB
;
5517 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5518 shndx
= MAP_SYM_SHNDX
;
5519 osym
->internal_elf_sym
.st_shndx
= shndx
;
5525 /* Swap out the symbols. */
5528 swap_out_syms (bfd
*abfd
,
5529 struct bfd_strtab_hash
**sttp
,
5532 const struct elf_backend_data
*bed
;
5535 struct bfd_strtab_hash
*stt
;
5536 Elf_Internal_Shdr
*symtab_hdr
;
5537 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5538 Elf_Internal_Shdr
*symstrtab_hdr
;
5539 char *outbound_syms
;
5540 char *outbound_shndx
;
5543 bfd_boolean name_local_sections
;
5545 if (!elf_map_symbols (abfd
))
5548 /* Dump out the symtabs. */
5549 stt
= _bfd_elf_stringtab_init ();
5553 bed
= get_elf_backend_data (abfd
);
5554 symcount
= bfd_get_symcount (abfd
);
5555 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5556 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5557 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5558 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5559 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5560 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5562 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5563 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5565 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5566 outbound_syms
= bfd_alloc (abfd
, amt
);
5567 if (outbound_syms
== NULL
)
5569 _bfd_stringtab_free (stt
);
5572 symtab_hdr
->contents
= outbound_syms
;
5574 outbound_shndx
= NULL
;
5575 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5576 if (symtab_shndx_hdr
->sh_name
!= 0)
5578 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5579 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5580 if (outbound_shndx
== NULL
)
5582 _bfd_stringtab_free (stt
);
5586 symtab_shndx_hdr
->contents
= outbound_shndx
;
5587 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5588 symtab_shndx_hdr
->sh_size
= amt
;
5589 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5590 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5593 /* Now generate the data (for "contents"). */
5595 /* Fill in zeroth symbol and swap it out. */
5596 Elf_Internal_Sym sym
;
5602 sym
.st_shndx
= SHN_UNDEF
;
5603 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5604 outbound_syms
+= bed
->s
->sizeof_sym
;
5605 if (outbound_shndx
!= NULL
)
5606 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5610 = (bed
->elf_backend_name_local_section_symbols
5611 && bed
->elf_backend_name_local_section_symbols (abfd
));
5613 syms
= bfd_get_outsymbols (abfd
);
5614 for (idx
= 0; idx
< symcount
; idx
++)
5616 Elf_Internal_Sym sym
;
5617 bfd_vma value
= syms
[idx
]->value
;
5618 elf_symbol_type
*type_ptr
;
5619 flagword flags
= syms
[idx
]->flags
;
5622 if (!name_local_sections
5623 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5625 /* Local section symbols have no name. */
5630 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5633 if (sym
.st_name
== (unsigned long) -1)
5635 _bfd_stringtab_free (stt
);
5640 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5642 if ((flags
& BSF_SECTION_SYM
) == 0
5643 && bfd_is_com_section (syms
[idx
]->section
))
5645 /* ELF common symbols put the alignment into the `value' field,
5646 and the size into the `size' field. This is backwards from
5647 how BFD handles it, so reverse it here. */
5648 sym
.st_size
= value
;
5649 if (type_ptr
== NULL
5650 || type_ptr
->internal_elf_sym
.st_value
== 0)
5651 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5653 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5654 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5655 (abfd
, syms
[idx
]->section
);
5659 asection
*sec
= syms
[idx
]->section
;
5662 if (sec
->output_section
)
5664 value
+= sec
->output_offset
;
5665 sec
= sec
->output_section
;
5668 /* Don't add in the section vma for relocatable output. */
5669 if (! relocatable_p
)
5671 sym
.st_value
= value
;
5672 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5674 if (bfd_is_abs_section (sec
)
5676 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5678 /* This symbol is in a real ELF section which we did
5679 not create as a BFD section. Undo the mapping done
5680 by copy_private_symbol_data. */
5681 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5685 shndx
= elf_onesymtab (abfd
);
5688 shndx
= elf_dynsymtab (abfd
);
5691 shndx
= elf_tdata (abfd
)->strtab_section
;
5694 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5697 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5705 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5711 /* Writing this would be a hell of a lot easier if
5712 we had some decent documentation on bfd, and
5713 knew what to expect of the library, and what to
5714 demand of applications. For example, it
5715 appears that `objcopy' might not set the
5716 section of a symbol to be a section that is
5717 actually in the output file. */
5718 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5721 _bfd_error_handler (_("\
5722 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5723 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5725 bfd_set_error (bfd_error_invalid_operation
);
5726 _bfd_stringtab_free (stt
);
5730 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5731 BFD_ASSERT (shndx
!= -1);
5735 sym
.st_shndx
= shndx
;
5738 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5740 else if ((flags
& BSF_FUNCTION
) != 0)
5742 else if ((flags
& BSF_OBJECT
) != 0)
5747 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5750 /* Processor-specific types. */
5751 if (type_ptr
!= NULL
5752 && bed
->elf_backend_get_symbol_type
)
5753 type
= ((*bed
->elf_backend_get_symbol_type
)
5754 (&type_ptr
->internal_elf_sym
, type
));
5756 if (flags
& BSF_SECTION_SYM
)
5758 if (flags
& BSF_GLOBAL
)
5759 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5761 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5763 else if (bfd_is_com_section (syms
[idx
]->section
))
5764 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5765 else if (bfd_is_und_section (syms
[idx
]->section
))
5766 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5770 else if (flags
& BSF_FILE
)
5771 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5774 int bind
= STB_LOCAL
;
5776 if (flags
& BSF_LOCAL
)
5778 else if (flags
& BSF_WEAK
)
5780 else if (flags
& BSF_GLOBAL
)
5783 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5786 if (type_ptr
!= NULL
)
5787 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5791 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5792 outbound_syms
+= bed
->s
->sizeof_sym
;
5793 if (outbound_shndx
!= NULL
)
5794 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5798 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5799 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5801 symstrtab_hdr
->sh_flags
= 0;
5802 symstrtab_hdr
->sh_addr
= 0;
5803 symstrtab_hdr
->sh_entsize
= 0;
5804 symstrtab_hdr
->sh_link
= 0;
5805 symstrtab_hdr
->sh_info
= 0;
5806 symstrtab_hdr
->sh_addralign
= 1;
5811 /* Return the number of bytes required to hold the symtab vector.
5813 Note that we base it on the count plus 1, since we will null terminate
5814 the vector allocated based on this size. However, the ELF symbol table
5815 always has a dummy entry as symbol #0, so it ends up even. */
5818 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5822 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5824 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5825 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5827 symtab_size
-= sizeof (asymbol
*);
5833 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5837 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5839 if (elf_dynsymtab (abfd
) == 0)
5841 bfd_set_error (bfd_error_invalid_operation
);
5845 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5846 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5848 symtab_size
-= sizeof (asymbol
*);
5854 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5857 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5860 /* Canonicalize the relocs. */
5863 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5870 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5872 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5875 tblptr
= section
->relocation
;
5876 for (i
= 0; i
< section
->reloc_count
; i
++)
5877 *relptr
++ = tblptr
++;
5881 return section
->reloc_count
;
5885 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5887 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5888 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5891 bfd_get_symcount (abfd
) = symcount
;
5896 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5897 asymbol
**allocation
)
5899 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5900 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5903 bfd_get_dynamic_symcount (abfd
) = symcount
;
5907 /* Return the size required for the dynamic reloc entries. Any
5908 section that was actually installed in the BFD, and has type
5909 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5910 considered to be a dynamic reloc section. */
5913 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5918 if (elf_dynsymtab (abfd
) == 0)
5920 bfd_set_error (bfd_error_invalid_operation
);
5924 ret
= sizeof (arelent
*);
5925 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5926 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5927 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5928 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5929 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5930 * sizeof (arelent
*));
5935 /* Canonicalize the dynamic relocation entries. Note that we return
5936 the dynamic relocations as a single block, although they are
5937 actually associated with particular sections; the interface, which
5938 was designed for SunOS style shared libraries, expects that there
5939 is only one set of dynamic relocs. Any section that was actually
5940 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5941 the dynamic symbol table, is considered to be a dynamic reloc
5945 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
5949 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5953 if (elf_dynsymtab (abfd
) == 0)
5955 bfd_set_error (bfd_error_invalid_operation
);
5959 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5961 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5963 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5964 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5965 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5970 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
5972 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5974 for (i
= 0; i
< count
; i
++)
5985 /* Read in the version information. */
5988 _bfd_elf_slurp_version_tables (bfd
*abfd
)
5990 bfd_byte
*contents
= NULL
;
5993 if (elf_dynverdef (abfd
) != 0)
5995 Elf_Internal_Shdr
*hdr
;
5996 Elf_External_Verdef
*everdef
;
5997 Elf_Internal_Verdef
*iverdef
;
5998 Elf_Internal_Verdef
*iverdefarr
;
5999 Elf_Internal_Verdef iverdefmem
;
6001 unsigned int maxidx
;
6003 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6005 contents
= bfd_malloc (hdr
->sh_size
);
6006 if (contents
== NULL
)
6008 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6009 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6012 /* We know the number of entries in the section but not the maximum
6013 index. Therefore we have to run through all entries and find
6015 everdef
= (Elf_External_Verdef
*) contents
;
6017 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6019 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6021 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6022 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6024 everdef
= ((Elf_External_Verdef
*)
6025 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6028 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6029 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6030 if (elf_tdata (abfd
)->verdef
== NULL
)
6033 elf_tdata (abfd
)->cverdefs
= maxidx
;
6035 everdef
= (Elf_External_Verdef
*) contents
;
6036 iverdefarr
= elf_tdata (abfd
)->verdef
;
6037 for (i
= 0; i
< hdr
->sh_info
; i
++)
6039 Elf_External_Verdaux
*everdaux
;
6040 Elf_Internal_Verdaux
*iverdaux
;
6043 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6045 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6046 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6048 iverdef
->vd_bfd
= abfd
;
6050 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6051 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6052 if (iverdef
->vd_auxptr
== NULL
)
6055 everdaux
= ((Elf_External_Verdaux
*)
6056 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6057 iverdaux
= iverdef
->vd_auxptr
;
6058 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6060 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6062 iverdaux
->vda_nodename
=
6063 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6064 iverdaux
->vda_name
);
6065 if (iverdaux
->vda_nodename
== NULL
)
6068 if (j
+ 1 < iverdef
->vd_cnt
)
6069 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6071 iverdaux
->vda_nextptr
= NULL
;
6073 everdaux
= ((Elf_External_Verdaux
*)
6074 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6077 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6079 if (i
+ 1 < hdr
->sh_info
)
6080 iverdef
->vd_nextdef
= iverdef
+ 1;
6082 iverdef
->vd_nextdef
= NULL
;
6084 everdef
= ((Elf_External_Verdef
*)
6085 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6092 if (elf_dynverref (abfd
) != 0)
6094 Elf_Internal_Shdr
*hdr
;
6095 Elf_External_Verneed
*everneed
;
6096 Elf_Internal_Verneed
*iverneed
;
6099 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6101 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6102 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6103 if (elf_tdata (abfd
)->verref
== NULL
)
6106 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6108 contents
= bfd_malloc (hdr
->sh_size
);
6109 if (contents
== NULL
)
6111 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6112 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6115 everneed
= (Elf_External_Verneed
*) contents
;
6116 iverneed
= elf_tdata (abfd
)->verref
;
6117 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6119 Elf_External_Vernaux
*evernaux
;
6120 Elf_Internal_Vernaux
*ivernaux
;
6123 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6125 iverneed
->vn_bfd
= abfd
;
6127 iverneed
->vn_filename
=
6128 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6130 if (iverneed
->vn_filename
== NULL
)
6133 amt
= iverneed
->vn_cnt
;
6134 amt
*= sizeof (Elf_Internal_Vernaux
);
6135 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6137 evernaux
= ((Elf_External_Vernaux
*)
6138 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6139 ivernaux
= iverneed
->vn_auxptr
;
6140 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6142 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6144 ivernaux
->vna_nodename
=
6145 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6146 ivernaux
->vna_name
);
6147 if (ivernaux
->vna_nodename
== NULL
)
6150 if (j
+ 1 < iverneed
->vn_cnt
)
6151 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6153 ivernaux
->vna_nextptr
= NULL
;
6155 evernaux
= ((Elf_External_Vernaux
*)
6156 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6159 if (i
+ 1 < hdr
->sh_info
)
6160 iverneed
->vn_nextref
= iverneed
+ 1;
6162 iverneed
->vn_nextref
= NULL
;
6164 everneed
= ((Elf_External_Verneed
*)
6165 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6175 if (contents
!= NULL
)
6181 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6183 elf_symbol_type
*newsym
;
6184 bfd_size_type amt
= sizeof (elf_symbol_type
);
6186 newsym
= bfd_zalloc (abfd
, amt
);
6191 newsym
->symbol
.the_bfd
= abfd
;
6192 return &newsym
->symbol
;
6197 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6201 bfd_symbol_info (symbol
, ret
);
6204 /* Return whether a symbol name implies a local symbol. Most targets
6205 use this function for the is_local_label_name entry point, but some
6209 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6212 /* Normal local symbols start with ``.L''. */
6213 if (name
[0] == '.' && name
[1] == 'L')
6216 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6217 DWARF debugging symbols starting with ``..''. */
6218 if (name
[0] == '.' && name
[1] == '.')
6221 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6222 emitting DWARF debugging output. I suspect this is actually a
6223 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6224 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6225 underscore to be emitted on some ELF targets). For ease of use,
6226 we treat such symbols as local. */
6227 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6234 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6235 asymbol
*symbol ATTRIBUTE_UNUSED
)
6242 _bfd_elf_set_arch_mach (bfd
*abfd
,
6243 enum bfd_architecture arch
,
6244 unsigned long machine
)
6246 /* If this isn't the right architecture for this backend, and this
6247 isn't the generic backend, fail. */
6248 if (arch
!= get_elf_backend_data (abfd
)->arch
6249 && arch
!= bfd_arch_unknown
6250 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6253 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6256 /* Find the function to a particular section and offset,
6257 for error reporting. */
6260 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6264 const char **filename_ptr
,
6265 const char **functionname_ptr
)
6267 const char *filename
;
6276 for (p
= symbols
; *p
!= NULL
; p
++)
6280 q
= (elf_symbol_type
*) *p
;
6282 if (bfd_get_section (&q
->symbol
) != section
)
6285 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6290 filename
= bfd_asymbol_name (&q
->symbol
);
6294 if (q
->symbol
.section
== section
6295 && q
->symbol
.value
>= low_func
6296 && q
->symbol
.value
<= offset
)
6298 func
= (asymbol
*) q
;
6299 low_func
= q
->symbol
.value
;
6309 *filename_ptr
= filename
;
6310 if (functionname_ptr
)
6311 *functionname_ptr
= bfd_asymbol_name (func
);
6316 /* Find the nearest line to a particular section and offset,
6317 for error reporting. */
6320 _bfd_elf_find_nearest_line (bfd
*abfd
,
6324 const char **filename_ptr
,
6325 const char **functionname_ptr
,
6326 unsigned int *line_ptr
)
6330 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6331 filename_ptr
, functionname_ptr
,
6334 if (!*functionname_ptr
)
6335 elf_find_function (abfd
, section
, symbols
, offset
,
6336 *filename_ptr
? NULL
: filename_ptr
,
6342 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6343 filename_ptr
, functionname_ptr
,
6345 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6347 if (!*functionname_ptr
)
6348 elf_find_function (abfd
, section
, symbols
, offset
,
6349 *filename_ptr
? NULL
: filename_ptr
,
6355 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6356 &found
, filename_ptr
,
6357 functionname_ptr
, line_ptr
,
6358 &elf_tdata (abfd
)->line_info
))
6360 if (found
&& (*functionname_ptr
|| *line_ptr
))
6363 if (symbols
== NULL
)
6366 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6367 filename_ptr
, functionname_ptr
))
6375 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6379 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6381 ret
+= get_program_header_size (abfd
);
6386 _bfd_elf_set_section_contents (bfd
*abfd
,
6388 const void *location
,
6390 bfd_size_type count
)
6392 Elf_Internal_Shdr
*hdr
;
6395 if (! abfd
->output_has_begun
6396 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6399 hdr
= &elf_section_data (section
)->this_hdr
;
6400 pos
= hdr
->sh_offset
+ offset
;
6401 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6402 || bfd_bwrite (location
, count
, abfd
) != count
)
6409 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6410 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6411 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6416 /* Try to convert a non-ELF reloc into an ELF one. */
6419 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6421 /* Check whether we really have an ELF howto. */
6423 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6425 bfd_reloc_code_real_type code
;
6426 reloc_howto_type
*howto
;
6428 /* Alien reloc: Try to determine its type to replace it with an
6429 equivalent ELF reloc. */
6431 if (areloc
->howto
->pc_relative
)
6433 switch (areloc
->howto
->bitsize
)
6436 code
= BFD_RELOC_8_PCREL
;
6439 code
= BFD_RELOC_12_PCREL
;
6442 code
= BFD_RELOC_16_PCREL
;
6445 code
= BFD_RELOC_24_PCREL
;
6448 code
= BFD_RELOC_32_PCREL
;
6451 code
= BFD_RELOC_64_PCREL
;
6457 howto
= bfd_reloc_type_lookup (abfd
, code
);
6459 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6461 if (howto
->pcrel_offset
)
6462 areloc
->addend
+= areloc
->address
;
6464 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6469 switch (areloc
->howto
->bitsize
)
6475 code
= BFD_RELOC_14
;
6478 code
= BFD_RELOC_16
;
6481 code
= BFD_RELOC_26
;
6484 code
= BFD_RELOC_32
;
6487 code
= BFD_RELOC_64
;
6493 howto
= bfd_reloc_type_lookup (abfd
, code
);
6497 areloc
->howto
= howto
;
6505 (*_bfd_error_handler
)
6506 (_("%s: unsupported relocation type %s"),
6507 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6508 bfd_set_error (bfd_error_bad_value
);
6513 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6515 if (bfd_get_format (abfd
) == bfd_object
)
6517 if (elf_shstrtab (abfd
) != NULL
)
6518 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6521 return _bfd_generic_close_and_cleanup (abfd
);
6524 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6525 in the relocation's offset. Thus we cannot allow any sort of sanity
6526 range-checking to interfere. There is nothing else to do in processing
6529 bfd_reloc_status_type
6530 _bfd_elf_rel_vtable_reloc_fn
6531 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6532 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6533 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6534 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6536 return bfd_reloc_ok
;
6539 /* Elf core file support. Much of this only works on native
6540 toolchains, since we rely on knowing the
6541 machine-dependent procfs structure in order to pick
6542 out details about the corefile. */
6544 #ifdef HAVE_SYS_PROCFS_H
6545 # include <sys/procfs.h>
6548 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6551 elfcore_make_pid (bfd
*abfd
)
6553 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6554 + (elf_tdata (abfd
)->core_pid
));
6557 /* If there isn't a section called NAME, make one, using
6558 data from SECT. Note, this function will generate a
6559 reference to NAME, so you shouldn't deallocate or
6563 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6567 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6570 sect2
= bfd_make_section (abfd
, name
);
6574 sect2
->size
= sect
->size
;
6575 sect2
->filepos
= sect
->filepos
;
6576 sect2
->flags
= sect
->flags
;
6577 sect2
->alignment_power
= sect
->alignment_power
;
6581 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6582 actually creates up to two pseudosections:
6583 - For the single-threaded case, a section named NAME, unless
6584 such a section already exists.
6585 - For the multi-threaded case, a section named "NAME/PID", where
6586 PID is elfcore_make_pid (abfd).
6587 Both pseudosections have identical contents. */
6589 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6595 char *threaded_name
;
6599 /* Build the section name. */
6601 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6602 len
= strlen (buf
) + 1;
6603 threaded_name
= bfd_alloc (abfd
, len
);
6604 if (threaded_name
== NULL
)
6606 memcpy (threaded_name
, buf
, len
);
6608 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6612 sect
->filepos
= filepos
;
6613 sect
->flags
= SEC_HAS_CONTENTS
;
6614 sect
->alignment_power
= 2;
6616 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6619 /* prstatus_t exists on:
6621 linux 2.[01] + glibc
6625 #if defined (HAVE_PRSTATUS_T)
6628 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6633 if (note
->descsz
== sizeof (prstatus_t
))
6637 size
= sizeof (prstat
.pr_reg
);
6638 offset
= offsetof (prstatus_t
, pr_reg
);
6639 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6641 /* Do not overwrite the core signal if it
6642 has already been set by another thread. */
6643 if (elf_tdata (abfd
)->core_signal
== 0)
6644 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6645 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6647 /* pr_who exists on:
6650 pr_who doesn't exist on:
6653 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6654 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6657 #if defined (HAVE_PRSTATUS32_T)
6658 else if (note
->descsz
== sizeof (prstatus32_t
))
6660 /* 64-bit host, 32-bit corefile */
6661 prstatus32_t prstat
;
6663 size
= sizeof (prstat
.pr_reg
);
6664 offset
= offsetof (prstatus32_t
, pr_reg
);
6665 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6667 /* Do not overwrite the core signal if it
6668 has already been set by another thread. */
6669 if (elf_tdata (abfd
)->core_signal
== 0)
6670 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6671 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6673 /* pr_who exists on:
6676 pr_who doesn't exist on:
6679 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6680 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6683 #endif /* HAVE_PRSTATUS32_T */
6686 /* Fail - we don't know how to handle any other
6687 note size (ie. data object type). */
6691 /* Make a ".reg/999" section and a ".reg" section. */
6692 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6693 size
, note
->descpos
+ offset
);
6695 #endif /* defined (HAVE_PRSTATUS_T) */
6697 /* Create a pseudosection containing the exact contents of NOTE. */
6699 elfcore_make_note_pseudosection (bfd
*abfd
,
6701 Elf_Internal_Note
*note
)
6703 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6704 note
->descsz
, note
->descpos
);
6707 /* There isn't a consistent prfpregset_t across platforms,
6708 but it doesn't matter, because we don't have to pick this
6709 data structure apart. */
6712 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6714 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6717 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6718 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6722 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6724 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6727 #if defined (HAVE_PRPSINFO_T)
6728 typedef prpsinfo_t elfcore_psinfo_t
;
6729 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6730 typedef prpsinfo32_t elfcore_psinfo32_t
;
6734 #if defined (HAVE_PSINFO_T)
6735 typedef psinfo_t elfcore_psinfo_t
;
6736 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6737 typedef psinfo32_t elfcore_psinfo32_t
;
6741 /* return a malloc'ed copy of a string at START which is at
6742 most MAX bytes long, possibly without a terminating '\0'.
6743 the copy will always have a terminating '\0'. */
6746 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6749 char *end
= memchr (start
, '\0', max
);
6757 dups
= bfd_alloc (abfd
, len
+ 1);
6761 memcpy (dups
, start
, len
);
6767 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6769 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6771 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6773 elfcore_psinfo_t psinfo
;
6775 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6777 elf_tdata (abfd
)->core_program
6778 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6779 sizeof (psinfo
.pr_fname
));
6781 elf_tdata (abfd
)->core_command
6782 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6783 sizeof (psinfo
.pr_psargs
));
6785 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6786 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6788 /* 64-bit host, 32-bit corefile */
6789 elfcore_psinfo32_t psinfo
;
6791 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6793 elf_tdata (abfd
)->core_program
6794 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6795 sizeof (psinfo
.pr_fname
));
6797 elf_tdata (abfd
)->core_command
6798 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6799 sizeof (psinfo
.pr_psargs
));
6805 /* Fail - we don't know how to handle any other
6806 note size (ie. data object type). */
6810 /* Note that for some reason, a spurious space is tacked
6811 onto the end of the args in some (at least one anyway)
6812 implementations, so strip it off if it exists. */
6815 char *command
= elf_tdata (abfd
)->core_command
;
6816 int n
= strlen (command
);
6818 if (0 < n
&& command
[n
- 1] == ' ')
6819 command
[n
- 1] = '\0';
6824 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6826 #if defined (HAVE_PSTATUS_T)
6828 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6830 if (note
->descsz
== sizeof (pstatus_t
)
6831 #if defined (HAVE_PXSTATUS_T)
6832 || note
->descsz
== sizeof (pxstatus_t
)
6838 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6840 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6842 #if defined (HAVE_PSTATUS32_T)
6843 else if (note
->descsz
== sizeof (pstatus32_t
))
6845 /* 64-bit host, 32-bit corefile */
6848 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6850 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6853 /* Could grab some more details from the "representative"
6854 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6855 NT_LWPSTATUS note, presumably. */
6859 #endif /* defined (HAVE_PSTATUS_T) */
6861 #if defined (HAVE_LWPSTATUS_T)
6863 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6865 lwpstatus_t lwpstat
;
6871 if (note
->descsz
!= sizeof (lwpstat
)
6872 #if defined (HAVE_LWPXSTATUS_T)
6873 && note
->descsz
!= sizeof (lwpxstatus_t
)
6878 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6880 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6881 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6883 /* Make a ".reg/999" section. */
6885 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6886 len
= strlen (buf
) + 1;
6887 name
= bfd_alloc (abfd
, len
);
6890 memcpy (name
, buf
, len
);
6892 sect
= bfd_make_section_anyway (abfd
, name
);
6896 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6897 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6898 sect
->filepos
= note
->descpos
6899 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6902 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6903 sect
->size
= sizeof (lwpstat
.pr_reg
);
6904 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6907 sect
->flags
= SEC_HAS_CONTENTS
;
6908 sect
->alignment_power
= 2;
6910 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6913 /* Make a ".reg2/999" section */
6915 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6916 len
= strlen (buf
) + 1;
6917 name
= bfd_alloc (abfd
, len
);
6920 memcpy (name
, buf
, len
);
6922 sect
= bfd_make_section_anyway (abfd
, name
);
6926 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6927 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6928 sect
->filepos
= note
->descpos
6929 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6932 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6933 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
6934 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6937 sect
->flags
= SEC_HAS_CONTENTS
;
6938 sect
->alignment_power
= 2;
6940 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6942 #endif /* defined (HAVE_LWPSTATUS_T) */
6944 #if defined (HAVE_WIN32_PSTATUS_T)
6946 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6952 win32_pstatus_t pstatus
;
6954 if (note
->descsz
< sizeof (pstatus
))
6957 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6959 switch (pstatus
.data_type
)
6961 case NOTE_INFO_PROCESS
:
6962 /* FIXME: need to add ->core_command. */
6963 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6964 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6967 case NOTE_INFO_THREAD
:
6968 /* Make a ".reg/999" section. */
6969 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6971 len
= strlen (buf
) + 1;
6972 name
= bfd_alloc (abfd
, len
);
6976 memcpy (name
, buf
, len
);
6978 sect
= bfd_make_section_anyway (abfd
, name
);
6982 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6983 sect
->filepos
= (note
->descpos
6984 + offsetof (struct win32_pstatus
,
6985 data
.thread_info
.thread_context
));
6986 sect
->flags
= SEC_HAS_CONTENTS
;
6987 sect
->alignment_power
= 2;
6989 if (pstatus
.data
.thread_info
.is_active_thread
)
6990 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6994 case NOTE_INFO_MODULE
:
6995 /* Make a ".module/xxxxxxxx" section. */
6996 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6998 len
= strlen (buf
) + 1;
6999 name
= bfd_alloc (abfd
, len
);
7003 memcpy (name
, buf
, len
);
7005 sect
= bfd_make_section_anyway (abfd
, name
);
7010 sect
->size
= note
->descsz
;
7011 sect
->filepos
= note
->descpos
;
7012 sect
->flags
= SEC_HAS_CONTENTS
;
7013 sect
->alignment_power
= 2;
7022 #endif /* HAVE_WIN32_PSTATUS_T */
7025 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7027 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7035 if (bed
->elf_backend_grok_prstatus
)
7036 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7038 #if defined (HAVE_PRSTATUS_T)
7039 return elfcore_grok_prstatus (abfd
, note
);
7044 #if defined (HAVE_PSTATUS_T)
7046 return elfcore_grok_pstatus (abfd
, note
);
7049 #if defined (HAVE_LWPSTATUS_T)
7051 return elfcore_grok_lwpstatus (abfd
, note
);
7054 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7055 return elfcore_grok_prfpreg (abfd
, note
);
7057 #if defined (HAVE_WIN32_PSTATUS_T)
7058 case NT_WIN32PSTATUS
:
7059 return elfcore_grok_win32pstatus (abfd
, note
);
7062 case NT_PRXFPREG
: /* Linux SSE extension */
7063 if (note
->namesz
== 6
7064 && strcmp (note
->namedata
, "LINUX") == 0)
7065 return elfcore_grok_prxfpreg (abfd
, note
);
7071 if (bed
->elf_backend_grok_psinfo
)
7072 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7074 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7075 return elfcore_grok_psinfo (abfd
, note
);
7082 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7086 sect
->size
= note
->descsz
;
7087 sect
->filepos
= note
->descpos
;
7088 sect
->flags
= SEC_HAS_CONTENTS
;
7089 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7097 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7101 cp
= strchr (note
->namedata
, '@');
7104 *lwpidp
= atoi(cp
+ 1);
7111 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7114 /* Signal number at offset 0x08. */
7115 elf_tdata (abfd
)->core_signal
7116 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7118 /* Process ID at offset 0x50. */
7119 elf_tdata (abfd
)->core_pid
7120 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7122 /* Command name at 0x7c (max 32 bytes, including nul). */
7123 elf_tdata (abfd
)->core_command
7124 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7126 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7131 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7135 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7136 elf_tdata (abfd
)->core_lwpid
= lwp
;
7138 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7140 /* NetBSD-specific core "procinfo". Note that we expect to
7141 find this note before any of the others, which is fine,
7142 since the kernel writes this note out first when it
7143 creates a core file. */
7145 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7148 /* As of Jan 2002 there are no other machine-independent notes
7149 defined for NetBSD core files. If the note type is less
7150 than the start of the machine-dependent note types, we don't
7153 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7157 switch (bfd_get_arch (abfd
))
7159 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7160 PT_GETFPREGS == mach+2. */
7162 case bfd_arch_alpha
:
7163 case bfd_arch_sparc
:
7166 case NT_NETBSDCORE_FIRSTMACH
+0:
7167 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7169 case NT_NETBSDCORE_FIRSTMACH
+2:
7170 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7176 /* On all other arch's, PT_GETREGS == mach+1 and
7177 PT_GETFPREGS == mach+3. */
7182 case NT_NETBSDCORE_FIRSTMACH
+1:
7183 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7185 case NT_NETBSDCORE_FIRSTMACH
+3:
7186 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7196 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7198 void *ddata
= note
->descdata
;
7205 /* nto_procfs_status 'pid' field is at offset 0. */
7206 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7208 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7209 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7211 /* nto_procfs_status 'flags' field is at offset 8. */
7212 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7214 /* nto_procfs_status 'what' field is at offset 14. */
7215 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7217 elf_tdata (abfd
)->core_signal
= sig
;
7218 elf_tdata (abfd
)->core_lwpid
= *tid
;
7221 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7222 do not come from signals so we make sure we set the current
7223 thread just in case. */
7224 if (flags
& 0x00000080)
7225 elf_tdata (abfd
)->core_lwpid
= *tid
;
7227 /* Make a ".qnx_core_status/%d" section. */
7228 sprintf (buf
, ".qnx_core_status/%d", *tid
);
7230 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7235 sect
= bfd_make_section_anyway (abfd
, name
);
7239 sect
->size
= note
->descsz
;
7240 sect
->filepos
= note
->descpos
;
7241 sect
->flags
= SEC_HAS_CONTENTS
;
7242 sect
->alignment_power
= 2;
7244 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7248 elfcore_grok_nto_gregs (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t tid
)
7254 /* Make a ".reg/%d" section. */
7255 sprintf (buf
, ".reg/%d", tid
);
7257 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7262 sect
= bfd_make_section_anyway (abfd
, name
);
7266 sect
->size
= note
->descsz
;
7267 sect
->filepos
= note
->descpos
;
7268 sect
->flags
= SEC_HAS_CONTENTS
;
7269 sect
->alignment_power
= 2;
7271 /* This is the current thread. */
7272 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7273 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7278 #define BFD_QNT_CORE_INFO 7
7279 #define BFD_QNT_CORE_STATUS 8
7280 #define BFD_QNT_CORE_GREG 9
7281 #define BFD_QNT_CORE_FPREG 10
7284 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7286 /* Every GREG section has a STATUS section before it. Store the
7287 tid from the previous call to pass down to the next gregs
7289 static pid_t tid
= 1;
7293 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7294 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7295 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7296 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7297 default: return TRUE
;
7301 /* Function: elfcore_write_note
7308 size of data for note
7311 End of buffer containing note. */
7314 elfcore_write_note (bfd
*abfd
,
7322 Elf_External_Note
*xnp
;
7332 const struct elf_backend_data
*bed
;
7334 namesz
= strlen (name
) + 1;
7335 bed
= get_elf_backend_data (abfd
);
7336 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7339 newspace
= 12 + namesz
+ pad
+ size
;
7341 p
= realloc (buf
, *bufsiz
+ newspace
);
7343 *bufsiz
+= newspace
;
7344 xnp
= (Elf_External_Note
*) dest
;
7345 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7346 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7347 H_PUT_32 (abfd
, type
, xnp
->type
);
7351 memcpy (dest
, name
, namesz
);
7359 memcpy (dest
, input
, size
);
7363 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7365 elfcore_write_prpsinfo (bfd
*abfd
,
7372 char *note_name
= "CORE";
7374 #if defined (HAVE_PSINFO_T)
7376 note_type
= NT_PSINFO
;
7379 note_type
= NT_PRPSINFO
;
7382 memset (&data
, 0, sizeof (data
));
7383 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7384 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7385 return elfcore_write_note (abfd
, buf
, bufsiz
,
7386 note_name
, note_type
, &data
, sizeof (data
));
7388 #endif /* PSINFO_T or PRPSINFO_T */
7390 #if defined (HAVE_PRSTATUS_T)
7392 elfcore_write_prstatus (bfd
*abfd
,
7400 char *note_name
= "CORE";
7402 memset (&prstat
, 0, sizeof (prstat
));
7403 prstat
.pr_pid
= pid
;
7404 prstat
.pr_cursig
= cursig
;
7405 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7406 return elfcore_write_note (abfd
, buf
, bufsiz
,
7407 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7409 #endif /* HAVE_PRSTATUS_T */
7411 #if defined (HAVE_LWPSTATUS_T)
7413 elfcore_write_lwpstatus (bfd
*abfd
,
7420 lwpstatus_t lwpstat
;
7421 char *note_name
= "CORE";
7423 memset (&lwpstat
, 0, sizeof (lwpstat
));
7424 lwpstat
.pr_lwpid
= pid
>> 16;
7425 lwpstat
.pr_cursig
= cursig
;
7426 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7427 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7428 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7430 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7431 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7433 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7434 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7437 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7438 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7440 #endif /* HAVE_LWPSTATUS_T */
7442 #if defined (HAVE_PSTATUS_T)
7444 elfcore_write_pstatus (bfd
*abfd
,
7452 char *note_name
= "CORE";
7454 memset (&pstat
, 0, sizeof (pstat
));
7455 pstat
.pr_pid
= pid
& 0xffff;
7456 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7457 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7460 #endif /* HAVE_PSTATUS_T */
7463 elfcore_write_prfpreg (bfd
*abfd
,
7469 char *note_name
= "CORE";
7470 return elfcore_write_note (abfd
, buf
, bufsiz
,
7471 note_name
, NT_FPREGSET
, fpregs
, size
);
7475 elfcore_write_prxfpreg (bfd
*abfd
,
7478 const void *xfpregs
,
7481 char *note_name
= "LINUX";
7482 return elfcore_write_note (abfd
, buf
, bufsiz
,
7483 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7487 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7495 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7498 buf
= bfd_malloc (size
);
7502 if (bfd_bread (buf
, size
, abfd
) != size
)
7510 while (p
< buf
+ size
)
7512 /* FIXME: bad alignment assumption. */
7513 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7514 Elf_Internal_Note in
;
7516 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7518 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7519 in
.namedata
= xnp
->name
;
7521 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7522 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7523 in
.descpos
= offset
+ (in
.descdata
- buf
);
7525 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7527 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7530 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7532 if (! elfcore_grok_nto_note (abfd
, &in
))
7537 if (! elfcore_grok_note (abfd
, &in
))
7541 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7548 /* Providing external access to the ELF program header table. */
7550 /* Return an upper bound on the number of bytes required to store a
7551 copy of ABFD's program header table entries. Return -1 if an error
7552 occurs; bfd_get_error will return an appropriate code. */
7555 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7557 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7559 bfd_set_error (bfd_error_wrong_format
);
7563 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7566 /* Copy ABFD's program header table entries to *PHDRS. The entries
7567 will be stored as an array of Elf_Internal_Phdr structures, as
7568 defined in include/elf/internal.h. To find out how large the
7569 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7571 Return the number of program header table entries read, or -1 if an
7572 error occurs; bfd_get_error will return an appropriate code. */
7575 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7579 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7581 bfd_set_error (bfd_error_wrong_format
);
7585 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7586 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7587 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7593 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7596 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7598 i_ehdrp
= elf_elfheader (abfd
);
7599 if (i_ehdrp
== NULL
)
7600 sprintf_vma (buf
, value
);
7603 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7605 #if BFD_HOST_64BIT_LONG
7606 sprintf (buf
, "%016lx", value
);
7608 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7609 _bfd_int64_low (value
));
7613 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7616 sprintf_vma (buf
, value
);
7621 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7624 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7626 i_ehdrp
= elf_elfheader (abfd
);
7627 if (i_ehdrp
== NULL
)
7628 fprintf_vma ((FILE *) stream
, value
);
7631 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7633 #if BFD_HOST_64BIT_LONG
7634 fprintf ((FILE *) stream
, "%016lx", value
);
7636 fprintf ((FILE *) stream
, "%08lx%08lx",
7637 _bfd_int64_high (value
), _bfd_int64_low (value
));
7641 fprintf ((FILE *) stream
, "%08lx",
7642 (unsigned long) (value
& 0xffffffff));
7645 fprintf_vma ((FILE *) stream
, value
);
7649 enum elf_reloc_type_class
7650 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7652 return reloc_class_normal
;
7655 /* For RELA architectures, return the relocation value for a
7656 relocation against a local symbol. */
7659 _bfd_elf_rela_local_sym (bfd
*abfd
,
7660 Elf_Internal_Sym
*sym
,
7662 Elf_Internal_Rela
*rel
)
7664 asection
*sec
= *psec
;
7667 relocation
= (sec
->output_section
->vma
7668 + sec
->output_offset
7670 if ((sec
->flags
& SEC_MERGE
)
7671 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7672 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7675 _bfd_merged_section_offset (abfd
, psec
,
7676 elf_section_data (sec
)->sec_info
,
7677 sym
->st_value
+ rel
->r_addend
);
7680 /* If we have changed the section, and our original section is
7681 marked with SEC_EXCLUDE, it means that the original
7682 SEC_MERGE section has been completely subsumed in some
7683 other SEC_MERGE section. In this case, we need to leave
7684 some info around for --emit-relocs. */
7685 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7686 sec
->kept_section
= *psec
;
7689 rel
->r_addend
-= relocation
;
7690 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7696 _bfd_elf_rel_local_sym (bfd
*abfd
,
7697 Elf_Internal_Sym
*sym
,
7701 asection
*sec
= *psec
;
7703 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7704 return sym
->st_value
+ addend
;
7706 return _bfd_merged_section_offset (abfd
, psec
,
7707 elf_section_data (sec
)->sec_info
,
7708 sym
->st_value
+ addend
);
7712 _bfd_elf_section_offset (bfd
*abfd
,
7713 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7717 switch (sec
->sec_info_type
)
7719 case ELF_INFO_TYPE_STABS
:
7720 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7722 case ELF_INFO_TYPE_EH_FRAME
:
7723 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);
7729 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7730 reconstruct an ELF file by reading the segments out of remote memory
7731 based on the ELF file header at EHDR_VMA and the ELF program headers it
7732 points to. If not null, *LOADBASEP is filled in with the difference
7733 between the VMAs from which the segments were read, and the VMAs the
7734 file headers (and hence BFD's idea of each section's VMA) put them at.
7736 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7737 remote memory at target address VMA into the local buffer at MYADDR; it
7738 should return zero on success or an `errno' code on failure. TEMPL must
7739 be a BFD for an ELF target with the word size and byte order found in
7740 the remote memory. */
7743 bfd_elf_bfd_from_remote_memory
7747 int (*target_read_memory
) (bfd_vma
, char *, int))
7749 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7750 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7754 _bfd_elf_get_synthetic_symtab (bfd
*abfd
, asymbol
**dynsyms
, asymbol
**ret
)
7756 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7759 const char *relplt_name
;
7760 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7764 Elf_Internal_Shdr
*hdr
;
7769 if (!bed
->plt_sym_val
)
7772 relplt_name
= bed
->relplt_name
;
7773 if (relplt_name
== NULL
)
7774 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7775 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7779 hdr
= &elf_section_data (relplt
)->this_hdr
;
7780 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7781 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7784 plt
= bfd_get_section_by_name (abfd
, ".plt");
7788 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7789 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7792 count
= relplt
->size
/ hdr
->sh_entsize
;
7793 size
= count
* sizeof (asymbol
);
7794 p
= relplt
->relocation
;
7795 for (i
= 0; i
< count
; i
++, s
++, p
++)
7796 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7798 s
= *ret
= bfd_malloc (size
);
7802 names
= (char *) (s
+ count
);
7803 p
= relplt
->relocation
;
7805 for (i
= 0; i
< count
; i
++, s
++, p
++)
7810 addr
= bed
->plt_sym_val (i
, plt
, p
);
7811 if (addr
== (bfd_vma
) -1)
7814 *s
= **p
->sym_ptr_ptr
;
7816 s
->value
= addr
- plt
->vma
;
7818 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7819 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7821 memcpy (names
, "@plt", sizeof ("@plt"));
7822 names
+= sizeof ("@plt");
7829 /* Sort symbol by binding and section. We want to put definitions
7830 sorted by section at the beginning. */
7833 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7835 const Elf_Internal_Sym
*s1
;
7836 const Elf_Internal_Sym
*s2
;
7839 /* Make sure that undefined symbols are at the end. */
7840 s1
= (const Elf_Internal_Sym
*) arg1
;
7841 if (s1
->st_shndx
== SHN_UNDEF
)
7843 s2
= (const Elf_Internal_Sym
*) arg2
;
7844 if (s2
->st_shndx
== SHN_UNDEF
)
7847 /* Sorted by section index. */
7848 shndx
= s1
->st_shndx
- s2
->st_shndx
;
7852 /* Sorted by binding. */
7853 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
7858 Elf_Internal_Sym
*sym
;
7863 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7865 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7866 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7867 return strcmp (s1
->name
, s2
->name
);
7870 /* Check if 2 sections define the same set of local and global
7874 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
7877 const struct elf_backend_data
*bed1
, *bed2
;
7878 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7879 bfd_size_type symcount1
, symcount2
;
7880 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7881 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
7882 Elf_Internal_Sym
*isymend
;
7883 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
7884 bfd_size_type count1
, count2
, i
;
7891 /* If both are .gnu.linkonce sections, they have to have the same
7893 if (strncmp (sec1
->name
, ".gnu.linkonce",
7894 sizeof ".gnu.linkonce" - 1) == 0
7895 && strncmp (sec2
->name
, ".gnu.linkonce",
7896 sizeof ".gnu.linkonce" - 1) == 0)
7897 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
7898 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
7900 /* Both sections have to be in ELF. */
7901 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7902 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7905 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7908 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
7909 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
7911 /* If both are members of section groups, they have to have the
7913 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
7917 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7918 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7919 if (shndx1
== -1 || shndx2
== -1)
7922 bed1
= get_elf_backend_data (bfd1
);
7923 bed2
= get_elf_backend_data (bfd2
);
7924 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7925 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7926 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7927 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7929 if (symcount1
== 0 || symcount2
== 0)
7932 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7934 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7938 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
7941 /* Sort symbols by binding and section. Global definitions are at
7943 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
7944 elf_sort_elf_symbol
);
7945 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
7946 elf_sort_elf_symbol
);
7948 /* Count definitions in the section. */
7950 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
7951 isym
< isymend
; isym
++)
7953 if (isym
->st_shndx
== (unsigned int) shndx1
)
7960 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
7965 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
7966 isym
< isymend
; isym
++)
7968 if (isym
->st_shndx
== (unsigned int) shndx2
)
7975 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
7979 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7982 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
7983 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
7985 if (symtable1
== NULL
|| symtable2
== NULL
)
7989 for (isym
= isymstart1
, isymend
= isym
+ count1
;
7990 isym
< isymend
; isym
++)
7993 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8000 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8001 isym
< isymend
; isym
++)
8004 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8010 /* Sort symbol by name. */
8011 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8012 elf_sym_name_compare
);
8013 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8014 elf_sym_name_compare
);
8016 for (i
= 0; i
< count1
; i
++)
8017 /* Two symbols must have the same binding, type and name. */
8018 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8019 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8020 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)