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
;
2888 BFD_ASSERT (elfsec
!= 0);
2889 s
= elf_shdrp
[elfsec
]->bfd_section
->output_section
;
2890 BFD_ASSERT (s
!= NULL
);
2891 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2898 switch (d
->this_hdr
.sh_type
)
2902 /* A reloc section which we are treating as a normal BFD
2903 section. sh_link is the section index of the symbol
2904 table. sh_info is the section index of the section to
2905 which the relocation entries apply. We assume that an
2906 allocated reloc section uses the dynamic symbol table.
2907 FIXME: How can we be sure? */
2908 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2910 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2912 /* We look up the section the relocs apply to by name. */
2914 if (d
->this_hdr
.sh_type
== SHT_REL
)
2918 s
= bfd_get_section_by_name (abfd
, name
);
2920 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2924 /* We assume that a section named .stab*str is a stabs
2925 string section. We look for a section with the same name
2926 but without the trailing ``str'', and set its sh_link
2927 field to point to this section. */
2928 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2929 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2934 len
= strlen (sec
->name
);
2935 alc
= bfd_malloc (len
- 2);
2938 memcpy (alc
, sec
->name
, len
- 3);
2939 alc
[len
- 3] = '\0';
2940 s
= bfd_get_section_by_name (abfd
, alc
);
2944 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2946 /* This is a .stab section. */
2947 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2948 elf_section_data (s
)->this_hdr
.sh_entsize
2949 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2956 case SHT_GNU_verneed
:
2957 case SHT_GNU_verdef
:
2958 /* sh_link is the section header index of the string table
2959 used for the dynamic entries, or the symbol table, or the
2961 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2963 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2967 case SHT_GNU_versym
:
2968 /* sh_link is the section header index of the symbol table
2969 this hash table or version table is for. */
2970 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2972 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2976 d
->this_hdr
.sh_link
= t
->symtab_section
;
2980 for (secn
= 1; secn
< section_number
; ++secn
)
2981 if (i_shdrp
[secn
] == NULL
)
2982 i_shdrp
[secn
] = i_shdrp
[0];
2984 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2985 i_shdrp
[secn
]->sh_name
);
2989 /* Map symbol from it's internal number to the external number, moving
2990 all local symbols to be at the head of the list. */
2993 sym_is_global (bfd
*abfd
, asymbol
*sym
)
2995 /* If the backend has a special mapping, use it. */
2996 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2997 if (bed
->elf_backend_sym_is_global
)
2998 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3000 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3001 || bfd_is_und_section (bfd_get_section (sym
))
3002 || bfd_is_com_section (bfd_get_section (sym
)));
3006 elf_map_symbols (bfd
*abfd
)
3008 unsigned int symcount
= bfd_get_symcount (abfd
);
3009 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3010 asymbol
**sect_syms
;
3011 unsigned int num_locals
= 0;
3012 unsigned int num_globals
= 0;
3013 unsigned int num_locals2
= 0;
3014 unsigned int num_globals2
= 0;
3022 fprintf (stderr
, "elf_map_symbols\n");
3026 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3028 if (max_index
< asect
->index
)
3029 max_index
= asect
->index
;
3033 amt
= max_index
* sizeof (asymbol
*);
3034 sect_syms
= bfd_zalloc (abfd
, amt
);
3035 if (sect_syms
== NULL
)
3037 elf_section_syms (abfd
) = sect_syms
;
3038 elf_num_section_syms (abfd
) = max_index
;
3040 /* Init sect_syms entries for any section symbols we have already
3041 decided to output. */
3042 for (idx
= 0; idx
< symcount
; idx
++)
3044 asymbol
*sym
= syms
[idx
];
3046 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3053 if (sec
->owner
!= NULL
)
3055 if (sec
->owner
!= abfd
)
3057 if (sec
->output_offset
!= 0)
3060 sec
= sec
->output_section
;
3062 /* Empty sections in the input files may have had a
3063 section symbol created for them. (See the comment
3064 near the end of _bfd_generic_link_output_symbols in
3065 linker.c). If the linker script discards such
3066 sections then we will reach this point. Since we know
3067 that we cannot avoid this case, we detect it and skip
3068 the abort and the assignment to the sect_syms array.
3069 To reproduce this particular case try running the
3070 linker testsuite test ld-scripts/weak.exp for an ELF
3071 port that uses the generic linker. */
3072 if (sec
->owner
== NULL
)
3075 BFD_ASSERT (sec
->owner
== abfd
);
3077 sect_syms
[sec
->index
] = syms
[idx
];
3082 /* Classify all of the symbols. */
3083 for (idx
= 0; idx
< symcount
; idx
++)
3085 if (!sym_is_global (abfd
, syms
[idx
]))
3091 /* We will be adding a section symbol for each BFD section. Most normal
3092 sections will already have a section symbol in outsymbols, but
3093 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3094 at least in that case. */
3095 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3097 if (sect_syms
[asect
->index
] == NULL
)
3099 if (!sym_is_global (abfd
, asect
->symbol
))
3106 /* Now sort the symbols so the local symbols are first. */
3107 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3108 new_syms
= bfd_alloc (abfd
, amt
);
3110 if (new_syms
== NULL
)
3113 for (idx
= 0; idx
< symcount
; idx
++)
3115 asymbol
*sym
= syms
[idx
];
3118 if (!sym_is_global (abfd
, sym
))
3121 i
= num_locals
+ num_globals2
++;
3123 sym
->udata
.i
= i
+ 1;
3125 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3127 if (sect_syms
[asect
->index
] == NULL
)
3129 asymbol
*sym
= asect
->symbol
;
3132 sect_syms
[asect
->index
] = sym
;
3133 if (!sym_is_global (abfd
, sym
))
3136 i
= num_locals
+ num_globals2
++;
3138 sym
->udata
.i
= i
+ 1;
3142 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3144 elf_num_locals (abfd
) = num_locals
;
3145 elf_num_globals (abfd
) = num_globals
;
3149 /* Align to the maximum file alignment that could be required for any
3150 ELF data structure. */
3152 static inline file_ptr
3153 align_file_position (file_ptr off
, int align
)
3155 return (off
+ align
- 1) & ~(align
- 1);
3158 /* Assign a file position to a section, optionally aligning to the
3159 required section alignment. */
3162 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3170 al
= i_shdrp
->sh_addralign
;
3172 offset
= BFD_ALIGN (offset
, al
);
3174 i_shdrp
->sh_offset
= offset
;
3175 if (i_shdrp
->bfd_section
!= NULL
)
3176 i_shdrp
->bfd_section
->filepos
= offset
;
3177 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3178 offset
+= i_shdrp
->sh_size
;
3182 /* Compute the file positions we are going to put the sections at, and
3183 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3184 is not NULL, this is being called by the ELF backend linker. */
3187 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3188 struct bfd_link_info
*link_info
)
3190 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3192 struct bfd_strtab_hash
*strtab
;
3193 Elf_Internal_Shdr
*shstrtab_hdr
;
3195 if (abfd
->output_has_begun
)
3198 /* Do any elf backend specific processing first. */
3199 if (bed
->elf_backend_begin_write_processing
)
3200 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3202 if (! prep_headers (abfd
))
3205 /* Post process the headers if necessary. */
3206 if (bed
->elf_backend_post_process_headers
)
3207 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3210 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3214 if (!assign_section_numbers (abfd
))
3217 /* The backend linker builds symbol table information itself. */
3218 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3220 /* Non-zero if doing a relocatable link. */
3221 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3223 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3227 if (link_info
== NULL
)
3229 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3234 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3235 /* sh_name was set in prep_headers. */
3236 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3237 shstrtab_hdr
->sh_flags
= 0;
3238 shstrtab_hdr
->sh_addr
= 0;
3239 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3240 shstrtab_hdr
->sh_entsize
= 0;
3241 shstrtab_hdr
->sh_link
= 0;
3242 shstrtab_hdr
->sh_info
= 0;
3243 /* sh_offset is set in assign_file_positions_except_relocs. */
3244 shstrtab_hdr
->sh_addralign
= 1;
3246 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3249 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3252 Elf_Internal_Shdr
*hdr
;
3254 off
= elf_tdata (abfd
)->next_file_pos
;
3256 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3257 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3259 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3260 if (hdr
->sh_size
!= 0)
3261 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3263 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3264 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3266 elf_tdata (abfd
)->next_file_pos
= off
;
3268 /* Now that we know where the .strtab section goes, write it
3270 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3271 || ! _bfd_stringtab_emit (abfd
, strtab
))
3273 _bfd_stringtab_free (strtab
);
3276 abfd
->output_has_begun
= TRUE
;
3281 /* Create a mapping from a set of sections to a program segment. */
3283 static struct elf_segment_map
*
3284 make_mapping (bfd
*abfd
,
3285 asection
**sections
,
3290 struct elf_segment_map
*m
;
3295 amt
= sizeof (struct elf_segment_map
);
3296 amt
+= (to
- from
- 1) * sizeof (asection
*);
3297 m
= bfd_zalloc (abfd
, amt
);
3301 m
->p_type
= PT_LOAD
;
3302 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3303 m
->sections
[i
- from
] = *hdrpp
;
3304 m
->count
= to
- from
;
3306 if (from
== 0 && phdr
)
3308 /* Include the headers in the first PT_LOAD segment. */
3309 m
->includes_filehdr
= 1;
3310 m
->includes_phdrs
= 1;
3316 /* Set up a mapping from BFD sections to program segments. */
3319 map_sections_to_segments (bfd
*abfd
)
3321 asection
**sections
= NULL
;
3325 struct elf_segment_map
*mfirst
;
3326 struct elf_segment_map
**pm
;
3327 struct elf_segment_map
*m
;
3330 unsigned int phdr_index
;
3331 bfd_vma maxpagesize
;
3333 bfd_boolean phdr_in_segment
= TRUE
;
3334 bfd_boolean writable
;
3336 asection
*first_tls
= NULL
;
3337 asection
*dynsec
, *eh_frame_hdr
;
3340 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3343 if (bfd_count_sections (abfd
) == 0)
3346 /* Select the allocated sections, and sort them. */
3348 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3349 sections
= bfd_malloc (amt
);
3350 if (sections
== NULL
)
3354 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3356 if ((s
->flags
& SEC_ALLOC
) != 0)
3362 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3365 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3367 /* Build the mapping. */
3372 /* If we have a .interp section, then create a PT_PHDR segment for
3373 the program headers and a PT_INTERP segment for the .interp
3375 s
= bfd_get_section_by_name (abfd
, ".interp");
3376 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3378 amt
= sizeof (struct elf_segment_map
);
3379 m
= bfd_zalloc (abfd
, amt
);
3383 m
->p_type
= PT_PHDR
;
3384 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3385 m
->p_flags
= PF_R
| PF_X
;
3386 m
->p_flags_valid
= 1;
3387 m
->includes_phdrs
= 1;
3392 amt
= sizeof (struct elf_segment_map
);
3393 m
= bfd_zalloc (abfd
, amt
);
3397 m
->p_type
= PT_INTERP
;
3405 /* Look through the sections. We put sections in the same program
3406 segment when the start of the second section can be placed within
3407 a few bytes of the end of the first section. */
3411 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3413 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3415 && (dynsec
->flags
& SEC_LOAD
) == 0)
3418 /* Deal with -Ttext or something similar such that the first section
3419 is not adjacent to the program headers. This is an
3420 approximation, since at this point we don't know exactly how many
3421 program headers we will need. */
3424 bfd_size_type phdr_size
;
3426 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3428 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3429 if ((abfd
->flags
& D_PAGED
) == 0
3430 || sections
[0]->lma
< phdr_size
3431 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3432 phdr_in_segment
= FALSE
;
3435 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3438 bfd_boolean new_segment
;
3442 /* See if this section and the last one will fit in the same
3445 if (last_hdr
== NULL
)
3447 /* If we don't have a segment yet, then we don't need a new
3448 one (we build the last one after this loop). */
3449 new_segment
= FALSE
;
3451 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3453 /* If this section has a different relation between the
3454 virtual address and the load address, then we need a new
3458 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3459 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3461 /* If putting this section in this segment would force us to
3462 skip a page in the segment, then we need a new segment. */
3465 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3466 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3468 /* We don't want to put a loadable section after a
3469 nonloadable section in the same segment.
3470 Consider .tbss sections as loadable for this purpose. */
3473 else if ((abfd
->flags
& D_PAGED
) == 0)
3475 /* If the file is not demand paged, which means that we
3476 don't require the sections to be correctly aligned in the
3477 file, then there is no other reason for a new segment. */
3478 new_segment
= FALSE
;
3481 && (hdr
->flags
& SEC_READONLY
) == 0
3482 && (((last_hdr
->lma
+ last_size
- 1)
3483 & ~(maxpagesize
- 1))
3484 != (hdr
->lma
& ~(maxpagesize
- 1))))
3486 /* We don't want to put a writable section in a read only
3487 segment, unless they are on the same page in memory
3488 anyhow. We already know that the last section does not
3489 bring us past the current section on the page, so the
3490 only case in which the new section is not on the same
3491 page as the previous section is when the previous section
3492 ends precisely on a page boundary. */
3497 /* Otherwise, we can use the same segment. */
3498 new_segment
= FALSE
;
3503 if ((hdr
->flags
& SEC_READONLY
) == 0)
3506 /* .tbss sections effectively have zero size. */
3507 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3508 last_size
= hdr
->size
;
3514 /* We need a new program segment. We must create a new program
3515 header holding all the sections from phdr_index until hdr. */
3517 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3524 if ((hdr
->flags
& SEC_READONLY
) == 0)
3530 /* .tbss sections effectively have zero size. */
3531 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3532 last_size
= hdr
->size
;
3536 phdr_in_segment
= FALSE
;
3539 /* Create a final PT_LOAD program segment. */
3540 if (last_hdr
!= NULL
)
3542 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3550 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3553 amt
= sizeof (struct elf_segment_map
);
3554 m
= bfd_zalloc (abfd
, amt
);
3558 m
->p_type
= PT_DYNAMIC
;
3560 m
->sections
[0] = dynsec
;
3566 /* For each loadable .note section, add a PT_NOTE segment. We don't
3567 use bfd_get_section_by_name, because if we link together
3568 nonloadable .note sections and loadable .note sections, we will
3569 generate two .note sections in the output file. FIXME: Using
3570 names for section types is bogus anyhow. */
3571 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3573 if ((s
->flags
& SEC_LOAD
) != 0
3574 && strncmp (s
->name
, ".note", 5) == 0)
3576 amt
= sizeof (struct elf_segment_map
);
3577 m
= bfd_zalloc (abfd
, amt
);
3581 m
->p_type
= PT_NOTE
;
3588 if (s
->flags
& SEC_THREAD_LOCAL
)
3596 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3601 amt
= sizeof (struct elf_segment_map
);
3602 amt
+= (tls_count
- 1) * sizeof (asection
*);
3603 m
= bfd_zalloc (abfd
, amt
);
3608 m
->count
= tls_count
;
3609 /* Mandated PF_R. */
3611 m
->p_flags_valid
= 1;
3612 for (i
= 0; i
< tls_count
; ++i
)
3614 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3615 m
->sections
[i
] = first_tls
;
3616 first_tls
= first_tls
->next
;
3623 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3625 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3626 if (eh_frame_hdr
!= NULL
3627 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3629 amt
= sizeof (struct elf_segment_map
);
3630 m
= bfd_zalloc (abfd
, amt
);
3634 m
->p_type
= PT_GNU_EH_FRAME
;
3636 m
->sections
[0] = eh_frame_hdr
->output_section
;
3642 if (elf_tdata (abfd
)->stack_flags
)
3644 amt
= sizeof (struct elf_segment_map
);
3645 m
= bfd_zalloc (abfd
, amt
);
3649 m
->p_type
= PT_GNU_STACK
;
3650 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3651 m
->p_flags_valid
= 1;
3657 if (elf_tdata (abfd
)->relro
)
3659 amt
= sizeof (struct elf_segment_map
);
3660 m
= bfd_zalloc (abfd
, amt
);
3664 m
->p_type
= PT_GNU_RELRO
;
3666 m
->p_flags_valid
= 1;
3675 elf_tdata (abfd
)->segment_map
= mfirst
;
3679 if (sections
!= NULL
)
3684 /* Sort sections by address. */
3687 elf_sort_sections (const void *arg1
, const void *arg2
)
3689 const asection
*sec1
= *(const asection
**) arg1
;
3690 const asection
*sec2
= *(const asection
**) arg2
;
3691 bfd_size_type size1
, size2
;
3693 /* Sort by LMA first, since this is the address used to
3694 place the section into a segment. */
3695 if (sec1
->lma
< sec2
->lma
)
3697 else if (sec1
->lma
> sec2
->lma
)
3700 /* Then sort by VMA. Normally the LMA and the VMA will be
3701 the same, and this will do nothing. */
3702 if (sec1
->vma
< sec2
->vma
)
3704 else if (sec1
->vma
> sec2
->vma
)
3707 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3709 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3715 /* If the indicies are the same, do not return 0
3716 here, but continue to try the next comparison. */
3717 if (sec1
->target_index
- sec2
->target_index
!= 0)
3718 return sec1
->target_index
- sec2
->target_index
;
3723 else if (TOEND (sec2
))
3728 /* Sort by size, to put zero sized sections
3729 before others at the same address. */
3731 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3732 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3739 return sec1
->target_index
- sec2
->target_index
;
3742 /* Ian Lance Taylor writes:
3744 We shouldn't be using % with a negative signed number. That's just
3745 not good. We have to make sure either that the number is not
3746 negative, or that the number has an unsigned type. When the types
3747 are all the same size they wind up as unsigned. When file_ptr is a
3748 larger signed type, the arithmetic winds up as signed long long,
3751 What we're trying to say here is something like ``increase OFF by
3752 the least amount that will cause it to be equal to the VMA modulo
3754 /* In other words, something like:
3756 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3757 off_offset = off % bed->maxpagesize;
3758 if (vma_offset < off_offset)
3759 adjustment = vma_offset + bed->maxpagesize - off_offset;
3761 adjustment = vma_offset - off_offset;
3763 which can can be collapsed into the expression below. */
3766 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3768 return ((vma
- off
) % maxpagesize
);
3771 /* Assign file positions to the sections based on the mapping from
3772 sections to segments. This function also sets up some fields in
3773 the file header, and writes out the program headers. */
3776 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3778 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3780 struct elf_segment_map
*m
;
3782 Elf_Internal_Phdr
*phdrs
;
3784 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3785 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3786 Elf_Internal_Phdr
*p
;
3789 if (elf_tdata (abfd
)->segment_map
== NULL
)
3791 if (! map_sections_to_segments (abfd
))
3796 /* The placement algorithm assumes that non allocated sections are
3797 not in PT_LOAD segments. We ensure this here by removing such
3798 sections from the segment map. */
3799 for (m
= elf_tdata (abfd
)->segment_map
;
3803 unsigned int new_count
;
3806 if (m
->p_type
!= PT_LOAD
)
3810 for (i
= 0; i
< m
->count
; i
++)
3812 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3815 m
->sections
[new_count
] = m
->sections
[i
];
3821 if (new_count
!= m
->count
)
3822 m
->count
= new_count
;
3826 if (bed
->elf_backend_modify_segment_map
)
3828 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3833 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3836 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3837 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3838 elf_elfheader (abfd
)->e_phnum
= count
;
3843 /* If we already counted the number of program segments, make sure
3844 that we allocated enough space. This happens when SIZEOF_HEADERS
3845 is used in a linker script. */
3846 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3847 if (alloc
!= 0 && count
> alloc
)
3849 ((*_bfd_error_handler
)
3850 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3851 bfd_get_filename (abfd
), alloc
, count
));
3852 bfd_set_error (bfd_error_bad_value
);
3859 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3860 phdrs
= bfd_alloc (abfd
, amt
);
3864 off
= bed
->s
->sizeof_ehdr
;
3865 off
+= alloc
* bed
->s
->sizeof_phdr
;
3872 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3879 /* If elf_segment_map is not from map_sections_to_segments, the
3880 sections may not be correctly ordered. NOTE: sorting should
3881 not be done to the PT_NOTE section of a corefile, which may
3882 contain several pseudo-sections artificially created by bfd.
3883 Sorting these pseudo-sections breaks things badly. */
3885 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3886 && m
->p_type
== PT_NOTE
))
3887 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3890 p
->p_type
= m
->p_type
;
3891 p
->p_flags
= m
->p_flags
;
3893 if (p
->p_type
== PT_LOAD
3895 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3897 if ((abfd
->flags
& D_PAGED
) != 0)
3898 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3902 bfd_size_type align
;
3905 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3907 bfd_size_type secalign
;
3909 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3910 if (secalign
> align
)
3914 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3918 /* Make sure the .dynamic section is the first section in the
3919 PT_DYNAMIC segment. */
3920 else if (p
->p_type
== PT_DYNAMIC
3922 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
3925 (_("%s: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
3926 bfd_get_filename (abfd
));
3927 bfd_set_error (bfd_error_bad_value
);
3934 p
->p_vaddr
= m
->sections
[0]->vma
;
3936 if (m
->p_paddr_valid
)
3937 p
->p_paddr
= m
->p_paddr
;
3938 else if (m
->count
== 0)
3941 p
->p_paddr
= m
->sections
[0]->lma
;
3943 if (p
->p_type
== PT_LOAD
3944 && (abfd
->flags
& D_PAGED
) != 0)
3945 p
->p_align
= bed
->maxpagesize
;
3946 else if (m
->count
== 0)
3947 p
->p_align
= 1 << bed
->s
->log_file_align
;
3955 if (m
->includes_filehdr
)
3957 if (! m
->p_flags_valid
)
3960 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3961 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3964 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3966 if (p
->p_vaddr
< (bfd_vma
) off
)
3968 (*_bfd_error_handler
)
3969 (_("%s: Not enough room for program headers, try linking with -N"),
3970 bfd_get_filename (abfd
));
3971 bfd_set_error (bfd_error_bad_value
);
3976 if (! m
->p_paddr_valid
)
3979 if (p
->p_type
== PT_LOAD
)
3981 filehdr_vaddr
= p
->p_vaddr
;
3982 filehdr_paddr
= p
->p_paddr
;
3986 if (m
->includes_phdrs
)
3988 if (! m
->p_flags_valid
)
3991 if (m
->includes_filehdr
)
3993 if (p
->p_type
== PT_LOAD
)
3995 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3996 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4001 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4005 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4006 p
->p_vaddr
-= off
- p
->p_offset
;
4007 if (! m
->p_paddr_valid
)
4008 p
->p_paddr
-= off
- p
->p_offset
;
4011 if (p
->p_type
== PT_LOAD
)
4013 phdrs_vaddr
= p
->p_vaddr
;
4014 phdrs_paddr
= p
->p_paddr
;
4017 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4020 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4021 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4024 if (p
->p_type
== PT_LOAD
4025 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4027 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4033 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4034 p
->p_filesz
+= adjust
;
4035 p
->p_memsz
+= adjust
;
4041 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4045 bfd_size_type align
;
4049 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4051 /* The section may have artificial alignment forced by a
4052 link script. Notice this case by the gap between the
4053 cumulative phdr lma and the section's lma. */
4054 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
4056 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4058 p
->p_memsz
+= adjust
;
4059 if (p
->p_type
== PT_LOAD
4060 || (p
->p_type
== PT_NOTE
4061 && bfd_get_format (abfd
) == bfd_core
))
4066 if ((flags
& SEC_LOAD
) != 0
4067 || (flags
& SEC_THREAD_LOCAL
) != 0)
4068 p
->p_filesz
+= adjust
;
4071 if (p
->p_type
== PT_LOAD
)
4073 bfd_signed_vma adjust
;
4075 if ((flags
& SEC_LOAD
) != 0)
4077 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4081 else if ((flags
& SEC_ALLOC
) != 0)
4083 /* The section VMA must equal the file position
4084 modulo the page size. FIXME: I'm not sure if
4085 this adjustment is really necessary. We used to
4086 not have the SEC_LOAD case just above, and then
4087 this was necessary, but now I'm not sure. */
4088 if ((abfd
->flags
& D_PAGED
) != 0)
4089 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4092 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4102 (* _bfd_error_handler
) (_("\
4103 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4104 bfd_section_name (abfd
, sec
),
4109 p
->p_memsz
+= adjust
;
4112 if ((flags
& SEC_LOAD
) != 0)
4113 p
->p_filesz
+= adjust
;
4118 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4119 used in a linker script we may have a section with
4120 SEC_LOAD clear but which is supposed to have
4122 if ((flags
& SEC_LOAD
) != 0
4123 || (flags
& SEC_HAS_CONTENTS
) != 0)
4126 if ((flags
& SEC_ALLOC
) != 0
4127 && ((flags
& SEC_LOAD
) != 0
4128 || (flags
& SEC_THREAD_LOCAL
) == 0))
4132 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4134 /* The actual "note" segment has i == 0.
4135 This is the one that actually contains everything. */
4139 p
->p_filesz
= sec
->size
;
4145 /* Fake sections -- don't need to be written. */
4148 flags
= sec
->flags
= 0;
4155 if ((sec
->flags
& SEC_LOAD
) != 0
4156 || (sec
->flags
& SEC_THREAD_LOCAL
) == 0
4157 || p
->p_type
== PT_TLS
)
4158 p
->p_memsz
+= sec
->size
;
4160 if ((flags
& SEC_LOAD
) != 0)
4161 p
->p_filesz
+= sec
->size
;
4163 if (p
->p_type
== PT_TLS
4165 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4167 struct bfd_link_order
*o
;
4168 bfd_vma tbss_size
= 0;
4170 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4171 if (tbss_size
< o
->offset
+ o
->size
)
4172 tbss_size
= o
->offset
+ o
->size
;
4174 p
->p_memsz
+= tbss_size
;
4177 if (align
> p
->p_align
4178 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4182 if (! m
->p_flags_valid
)
4185 if ((flags
& SEC_CODE
) != 0)
4187 if ((flags
& SEC_READONLY
) == 0)
4193 /* Now that we have set the section file positions, we can set up
4194 the file positions for the non PT_LOAD segments. */
4195 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4199 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4201 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4202 p
->p_offset
= m
->sections
[0]->filepos
;
4206 if (m
->includes_filehdr
)
4208 p
->p_vaddr
= filehdr_vaddr
;
4209 if (! m
->p_paddr_valid
)
4210 p
->p_paddr
= filehdr_paddr
;
4212 else if (m
->includes_phdrs
)
4214 p
->p_vaddr
= phdrs_vaddr
;
4215 if (! m
->p_paddr_valid
)
4216 p
->p_paddr
= phdrs_paddr
;
4218 else if (p
->p_type
== PT_GNU_RELRO
)
4220 Elf_Internal_Phdr
*lp
;
4222 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4224 if (lp
->p_type
== PT_LOAD
4225 && lp
->p_vaddr
<= link_info
->relro_end
4226 && lp
->p_vaddr
>= link_info
->relro_start
4227 && lp
->p_vaddr
+ lp
->p_filesz
4228 >= link_info
->relro_end
)
4232 if (lp
< phdrs
+ count
4233 && link_info
->relro_end
> lp
->p_vaddr
)
4235 p
->p_vaddr
= lp
->p_vaddr
;
4236 p
->p_paddr
= lp
->p_paddr
;
4237 p
->p_offset
= lp
->p_offset
;
4238 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4239 p
->p_memsz
= p
->p_filesz
;
4241 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4245 memset (p
, 0, sizeof *p
);
4246 p
->p_type
= PT_NULL
;
4252 /* Clear out any program headers we allocated but did not use. */
4253 for (; count
< alloc
; count
++, p
++)
4255 memset (p
, 0, sizeof *p
);
4256 p
->p_type
= PT_NULL
;
4259 elf_tdata (abfd
)->phdr
= phdrs
;
4261 elf_tdata (abfd
)->next_file_pos
= off
;
4263 /* Write out the program headers. */
4264 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4265 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4271 /* Get the size of the program header.
4273 If this is called by the linker before any of the section VMA's are set, it
4274 can't calculate the correct value for a strange memory layout. This only
4275 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4276 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4277 data segment (exclusive of .interp and .dynamic).
4279 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4280 will be two segments. */
4282 static bfd_size_type
4283 get_program_header_size (bfd
*abfd
)
4287 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4289 /* We can't return a different result each time we're called. */
4290 if (elf_tdata (abfd
)->program_header_size
!= 0)
4291 return elf_tdata (abfd
)->program_header_size
;
4293 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4295 struct elf_segment_map
*m
;
4298 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4300 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4301 return elf_tdata (abfd
)->program_header_size
;
4304 /* Assume we will need exactly two PT_LOAD segments: one for text
4305 and one for data. */
4308 s
= bfd_get_section_by_name (abfd
, ".interp");
4309 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4311 /* If we have a loadable interpreter section, we need a
4312 PT_INTERP segment. In this case, assume we also need a
4313 PT_PHDR segment, although that may not be true for all
4318 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4320 /* We need a PT_DYNAMIC segment. */
4324 if (elf_tdata (abfd
)->eh_frame_hdr
)
4326 /* We need a PT_GNU_EH_FRAME segment. */
4330 if (elf_tdata (abfd
)->stack_flags
)
4332 /* We need a PT_GNU_STACK segment. */
4336 if (elf_tdata (abfd
)->relro
)
4338 /* We need a PT_GNU_RELRO segment. */
4342 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4344 if ((s
->flags
& SEC_LOAD
) != 0
4345 && strncmp (s
->name
, ".note", 5) == 0)
4347 /* We need a PT_NOTE segment. */
4352 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4354 if (s
->flags
& SEC_THREAD_LOCAL
)
4356 /* We need a PT_TLS segment. */
4362 /* Let the backend count up any program headers it might need. */
4363 if (bed
->elf_backend_additional_program_headers
)
4367 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4373 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4374 return elf_tdata (abfd
)->program_header_size
;
4377 /* Work out the file positions of all the sections. This is called by
4378 _bfd_elf_compute_section_file_positions. All the section sizes and
4379 VMAs must be known before this is called.
4381 We do not consider reloc sections at this point, unless they form
4382 part of the loadable image. Reloc sections are assigned file
4383 positions in assign_file_positions_for_relocs, which is called by
4384 write_object_contents and final_link.
4386 We also don't set the positions of the .symtab and .strtab here. */
4389 assign_file_positions_except_relocs (bfd
*abfd
,
4390 struct bfd_link_info
*link_info
)
4392 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4393 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4394 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4395 unsigned int num_sec
= elf_numsections (abfd
);
4397 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4399 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4400 && bfd_get_format (abfd
) != bfd_core
)
4402 Elf_Internal_Shdr
**hdrpp
;
4405 /* Start after the ELF header. */
4406 off
= i_ehdrp
->e_ehsize
;
4408 /* We are not creating an executable, which means that we are
4409 not creating a program header, and that the actual order of
4410 the sections in the file is unimportant. */
4411 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4413 Elf_Internal_Shdr
*hdr
;
4416 if (hdr
->sh_type
== SHT_REL
4417 || hdr
->sh_type
== SHT_RELA
4418 || i
== tdata
->symtab_section
4419 || i
== tdata
->symtab_shndx_section
4420 || i
== tdata
->strtab_section
)
4422 hdr
->sh_offset
= -1;
4425 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4427 if (i
== SHN_LORESERVE
- 1)
4429 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4430 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4437 Elf_Internal_Shdr
**hdrpp
;
4439 /* Assign file positions for the loaded sections based on the
4440 assignment of sections to segments. */
4441 if (! assign_file_positions_for_segments (abfd
, link_info
))
4444 /* Assign file positions for the other sections. */
4446 off
= elf_tdata (abfd
)->next_file_pos
;
4447 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4449 Elf_Internal_Shdr
*hdr
;
4452 if (hdr
->bfd_section
!= NULL
4453 && hdr
->bfd_section
->filepos
!= 0)
4454 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4455 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4457 ((*_bfd_error_handler
)
4458 (_("%s: warning: allocated section `%s' not in segment"),
4459 bfd_get_filename (abfd
),
4460 (hdr
->bfd_section
== NULL
4462 : hdr
->bfd_section
->name
)));
4463 if ((abfd
->flags
& D_PAGED
) != 0)
4464 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4467 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4469 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4472 else if (hdr
->sh_type
== SHT_REL
4473 || hdr
->sh_type
== SHT_RELA
4474 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4475 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4476 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4477 hdr
->sh_offset
= -1;
4479 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4481 if (i
== SHN_LORESERVE
- 1)
4483 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4484 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4489 /* Place the section headers. */
4490 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4491 i_ehdrp
->e_shoff
= off
;
4492 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4494 elf_tdata (abfd
)->next_file_pos
= off
;
4500 prep_headers (bfd
*abfd
)
4502 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4503 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4504 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4505 struct elf_strtab_hash
*shstrtab
;
4506 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4508 i_ehdrp
= elf_elfheader (abfd
);
4509 i_shdrp
= elf_elfsections (abfd
);
4511 shstrtab
= _bfd_elf_strtab_init ();
4512 if (shstrtab
== NULL
)
4515 elf_shstrtab (abfd
) = shstrtab
;
4517 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4518 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4519 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4520 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4522 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4523 i_ehdrp
->e_ident
[EI_DATA
] =
4524 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4525 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4527 if ((abfd
->flags
& DYNAMIC
) != 0)
4528 i_ehdrp
->e_type
= ET_DYN
;
4529 else if ((abfd
->flags
& EXEC_P
) != 0)
4530 i_ehdrp
->e_type
= ET_EXEC
;
4531 else if (bfd_get_format (abfd
) == bfd_core
)
4532 i_ehdrp
->e_type
= ET_CORE
;
4534 i_ehdrp
->e_type
= ET_REL
;
4536 switch (bfd_get_arch (abfd
))
4538 case bfd_arch_unknown
:
4539 i_ehdrp
->e_machine
= EM_NONE
;
4542 /* There used to be a long list of cases here, each one setting
4543 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4544 in the corresponding bfd definition. To avoid duplication,
4545 the switch was removed. Machines that need special handling
4546 can generally do it in elf_backend_final_write_processing(),
4547 unless they need the information earlier than the final write.
4548 Such need can generally be supplied by replacing the tests for
4549 e_machine with the conditions used to determine it. */
4551 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4554 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4555 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4557 /* No program header, for now. */
4558 i_ehdrp
->e_phoff
= 0;
4559 i_ehdrp
->e_phentsize
= 0;
4560 i_ehdrp
->e_phnum
= 0;
4562 /* Each bfd section is section header entry. */
4563 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4564 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4566 /* If we're building an executable, we'll need a program header table. */
4567 if (abfd
->flags
& EXEC_P
)
4569 /* It all happens later. */
4571 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4573 /* elf_build_phdrs() returns a (NULL-terminated) array of
4574 Elf_Internal_Phdrs. */
4575 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4576 i_ehdrp
->e_phoff
= outbase
;
4577 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4582 i_ehdrp
->e_phentsize
= 0;
4584 i_ehdrp
->e_phoff
= 0;
4587 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4588 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4589 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4590 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4591 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4592 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4593 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4594 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4595 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4601 /* Assign file positions for all the reloc sections which are not part
4602 of the loadable file image. */
4605 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4608 unsigned int i
, num_sec
;
4609 Elf_Internal_Shdr
**shdrpp
;
4611 off
= elf_tdata (abfd
)->next_file_pos
;
4613 num_sec
= elf_numsections (abfd
);
4614 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4616 Elf_Internal_Shdr
*shdrp
;
4619 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4620 && shdrp
->sh_offset
== -1)
4621 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4624 elf_tdata (abfd
)->next_file_pos
= off
;
4628 _bfd_elf_write_object_contents (bfd
*abfd
)
4630 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4631 Elf_Internal_Ehdr
*i_ehdrp
;
4632 Elf_Internal_Shdr
**i_shdrp
;
4634 unsigned int count
, num_sec
;
4636 if (! abfd
->output_has_begun
4637 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4640 i_shdrp
= elf_elfsections (abfd
);
4641 i_ehdrp
= elf_elfheader (abfd
);
4644 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4648 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4650 /* After writing the headers, we need to write the sections too... */
4651 num_sec
= elf_numsections (abfd
);
4652 for (count
= 1; count
< num_sec
; count
++)
4654 if (bed
->elf_backend_section_processing
)
4655 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4656 if (i_shdrp
[count
]->contents
)
4658 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4660 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4661 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4664 if (count
== SHN_LORESERVE
- 1)
4665 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4668 /* Write out the section header names. */
4669 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4670 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4673 if (bed
->elf_backend_final_write_processing
)
4674 (*bed
->elf_backend_final_write_processing
) (abfd
,
4675 elf_tdata (abfd
)->linker
);
4677 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4681 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4683 /* Hopefully this can be done just like an object file. */
4684 return _bfd_elf_write_object_contents (abfd
);
4687 /* Given a section, search the header to find them. */
4690 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4692 const struct elf_backend_data
*bed
;
4695 if (elf_section_data (asect
) != NULL
4696 && elf_section_data (asect
)->this_idx
!= 0)
4697 return elf_section_data (asect
)->this_idx
;
4699 if (bfd_is_abs_section (asect
))
4701 else if (bfd_is_com_section (asect
))
4703 else if (bfd_is_und_section (asect
))
4707 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4708 int maxindex
= elf_numsections (abfd
);
4710 for (index
= 1; index
< maxindex
; index
++)
4712 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4714 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4720 bed
= get_elf_backend_data (abfd
);
4721 if (bed
->elf_backend_section_from_bfd_section
)
4725 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4730 bfd_set_error (bfd_error_nonrepresentable_section
);
4735 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4739 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4741 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4743 flagword flags
= asym_ptr
->flags
;
4745 /* When gas creates relocations against local labels, it creates its
4746 own symbol for the section, but does put the symbol into the
4747 symbol chain, so udata is 0. When the linker is generating
4748 relocatable output, this section symbol may be for one of the
4749 input sections rather than the output section. */
4750 if (asym_ptr
->udata
.i
== 0
4751 && (flags
& BSF_SECTION_SYM
)
4752 && asym_ptr
->section
)
4756 if (asym_ptr
->section
->output_section
!= NULL
)
4757 indx
= asym_ptr
->section
->output_section
->index
;
4759 indx
= asym_ptr
->section
->index
;
4760 if (indx
< elf_num_section_syms (abfd
)
4761 && elf_section_syms (abfd
)[indx
] != NULL
)
4762 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4765 idx
= asym_ptr
->udata
.i
;
4769 /* This case can occur when using --strip-symbol on a symbol
4770 which is used in a relocation entry. */
4771 (*_bfd_error_handler
)
4772 (_("%s: symbol `%s' required but not present"),
4773 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4774 bfd_set_error (bfd_error_no_symbols
);
4781 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4782 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4783 elf_symbol_flags (flags
));
4791 /* Copy private BFD data. This copies any program header information. */
4794 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4796 Elf_Internal_Ehdr
*iehdr
;
4797 struct elf_segment_map
*map
;
4798 struct elf_segment_map
*map_first
;
4799 struct elf_segment_map
**pointer_to_map
;
4800 Elf_Internal_Phdr
*segment
;
4803 unsigned int num_segments
;
4804 bfd_boolean phdr_included
= FALSE
;
4805 bfd_vma maxpagesize
;
4806 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4807 unsigned int phdr_adjust_num
= 0;
4808 const struct elf_backend_data
*bed
;
4810 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4811 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4814 if (elf_tdata (ibfd
)->phdr
== NULL
)
4817 bed
= get_elf_backend_data (ibfd
);
4818 iehdr
= elf_elfheader (ibfd
);
4821 pointer_to_map
= &map_first
;
4823 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4824 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4826 /* Returns the end address of the segment + 1. */
4827 #define SEGMENT_END(segment, start) \
4828 (start + (segment->p_memsz > segment->p_filesz \
4829 ? segment->p_memsz : segment->p_filesz))
4831 #define SECTION_SIZE(section, segment) \
4832 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4833 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4834 ? section->size : 0)
4836 /* Returns TRUE if the given section is contained within
4837 the given segment. VMA addresses are compared. */
4838 #define IS_CONTAINED_BY_VMA(section, segment) \
4839 (section->vma >= segment->p_vaddr \
4840 && (section->vma + SECTION_SIZE (section, segment) \
4841 <= (SEGMENT_END (segment, segment->p_vaddr))))
4843 /* Returns TRUE if the given section is contained within
4844 the given segment. LMA addresses are compared. */
4845 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4846 (section->lma >= base \
4847 && (section->lma + SECTION_SIZE (section, segment) \
4848 <= SEGMENT_END (segment, base)))
4850 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4851 #define IS_COREFILE_NOTE(p, s) \
4852 (p->p_type == PT_NOTE \
4853 && bfd_get_format (ibfd) == bfd_core \
4854 && s->vma == 0 && s->lma == 0 \
4855 && (bfd_vma) s->filepos >= p->p_offset \
4856 && ((bfd_vma) s->filepos + s->size \
4857 <= p->p_offset + p->p_filesz))
4859 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4860 linker, which generates a PT_INTERP section with p_vaddr and
4861 p_memsz set to 0. */
4862 #define IS_SOLARIS_PT_INTERP(p, s) \
4864 && p->p_paddr == 0 \
4865 && p->p_memsz == 0 \
4866 && p->p_filesz > 0 \
4867 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4869 && (bfd_vma) s->filepos >= p->p_offset \
4870 && ((bfd_vma) s->filepos + s->size \
4871 <= p->p_offset + p->p_filesz))
4873 /* Decide if the given section should be included in the given segment.
4874 A section will be included if:
4875 1. It is within the address space of the segment -- we use the LMA
4876 if that is set for the segment and the VMA otherwise,
4877 2. It is an allocated segment,
4878 3. There is an output section associated with it,
4879 4. The section has not already been allocated to a previous segment.
4880 5. PT_GNU_STACK segments do not include any sections.
4881 6. PT_TLS segment includes only SHF_TLS sections.
4882 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4883 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4884 ((((segment->p_paddr \
4885 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4886 : IS_CONTAINED_BY_VMA (section, segment)) \
4887 && (section->flags & SEC_ALLOC) != 0) \
4888 || IS_COREFILE_NOTE (segment, section)) \
4889 && section->output_section != NULL \
4890 && segment->p_type != PT_GNU_STACK \
4891 && (segment->p_type != PT_TLS \
4892 || (section->flags & SEC_THREAD_LOCAL)) \
4893 && (segment->p_type == PT_LOAD \
4894 || segment->p_type == PT_TLS \
4895 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4896 && ! section->segment_mark)
4898 /* Returns TRUE iff seg1 starts after the end of seg2. */
4899 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4900 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4902 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4903 their VMA address ranges and their LMA address ranges overlap.
4904 It is possible to have overlapping VMA ranges without overlapping LMA
4905 ranges. RedBoot images for example can have both .data and .bss mapped
4906 to the same VMA range, but with the .data section mapped to a different
4908 #define SEGMENT_OVERLAPS(seg1, seg2) \
4909 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4910 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4911 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4912 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4914 /* Initialise the segment mark field. */
4915 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4916 section
->segment_mark
= FALSE
;
4918 /* Scan through the segments specified in the program header
4919 of the input BFD. For this first scan we look for overlaps
4920 in the loadable segments. These can be created by weird
4921 parameters to objcopy. Also, fix some solaris weirdness. */
4922 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4927 Elf_Internal_Phdr
*segment2
;
4929 if (segment
->p_type
== PT_INTERP
)
4930 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4931 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4933 /* Mininal change so that the normal section to segment
4934 assignment code will work. */
4935 segment
->p_vaddr
= section
->vma
;
4939 if (segment
->p_type
!= PT_LOAD
)
4942 /* Determine if this segment overlaps any previous segments. */
4943 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4945 bfd_signed_vma extra_length
;
4947 if (segment2
->p_type
!= PT_LOAD
4948 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4951 /* Merge the two segments together. */
4952 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4954 /* Extend SEGMENT2 to include SEGMENT and then delete
4957 SEGMENT_END (segment
, segment
->p_vaddr
)
4958 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4960 if (extra_length
> 0)
4962 segment2
->p_memsz
+= extra_length
;
4963 segment2
->p_filesz
+= extra_length
;
4966 segment
->p_type
= PT_NULL
;
4968 /* Since we have deleted P we must restart the outer loop. */
4970 segment
= elf_tdata (ibfd
)->phdr
;
4975 /* Extend SEGMENT to include SEGMENT2 and then delete
4978 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4979 - SEGMENT_END (segment
, segment
->p_vaddr
);
4981 if (extra_length
> 0)
4983 segment
->p_memsz
+= extra_length
;
4984 segment
->p_filesz
+= extra_length
;
4987 segment2
->p_type
= PT_NULL
;
4992 /* The second scan attempts to assign sections to segments. */
4993 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4997 unsigned int section_count
;
4998 asection
** sections
;
4999 asection
* output_section
;
5001 bfd_vma matching_lma
;
5002 bfd_vma suggested_lma
;
5006 if (segment
->p_type
== PT_NULL
)
5009 /* Compute how many sections might be placed into this segment. */
5010 for (section
= ibfd
->sections
, section_count
= 0;
5012 section
= section
->next
)
5013 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5016 /* Allocate a segment map big enough to contain
5017 all of the sections we have selected. */
5018 amt
= sizeof (struct elf_segment_map
);
5019 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5020 map
= bfd_alloc (obfd
, amt
);
5024 /* Initialise the fields of the segment map. Default to
5025 using the physical address of the segment in the input BFD. */
5027 map
->p_type
= segment
->p_type
;
5028 map
->p_flags
= segment
->p_flags
;
5029 map
->p_flags_valid
= 1;
5030 map
->p_paddr
= segment
->p_paddr
;
5031 map
->p_paddr_valid
= 1;
5033 /* Determine if this segment contains the ELF file header
5034 and if it contains the program headers themselves. */
5035 map
->includes_filehdr
= (segment
->p_offset
== 0
5036 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5038 map
->includes_phdrs
= 0;
5040 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5042 map
->includes_phdrs
=
5043 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5044 && (segment
->p_offset
+ segment
->p_filesz
5045 >= ((bfd_vma
) iehdr
->e_phoff
5046 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5048 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5049 phdr_included
= TRUE
;
5052 if (section_count
== 0)
5054 /* Special segments, such as the PT_PHDR segment, may contain
5055 no sections, but ordinary, loadable segments should contain
5056 something. They are allowed by the ELF spec however, so only
5057 a warning is produced. */
5058 if (segment
->p_type
== PT_LOAD
)
5059 (*_bfd_error_handler
)
5060 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
5061 bfd_archive_filename (ibfd
));
5064 *pointer_to_map
= map
;
5065 pointer_to_map
= &map
->next
;
5070 /* Now scan the sections in the input BFD again and attempt
5071 to add their corresponding output sections to the segment map.
5072 The problem here is how to handle an output section which has
5073 been moved (ie had its LMA changed). There are four possibilities:
5075 1. None of the sections have been moved.
5076 In this case we can continue to use the segment LMA from the
5079 2. All of the sections have been moved by the same amount.
5080 In this case we can change the segment's LMA to match the LMA
5081 of the first section.
5083 3. Some of the sections have been moved, others have not.
5084 In this case those sections which have not been moved can be
5085 placed in the current segment which will have to have its size,
5086 and possibly its LMA changed, and a new segment or segments will
5087 have to be created to contain the other sections.
5089 4. The sections have been moved, but not by the same amount.
5090 In this case we can change the segment's LMA to match the LMA
5091 of the first section and we will have to create a new segment
5092 or segments to contain the other sections.
5094 In order to save time, we allocate an array to hold the section
5095 pointers that we are interested in. As these sections get assigned
5096 to a segment, they are removed from this array. */
5098 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5099 to work around this long long bug. */
5100 amt
= section_count
* sizeof (asection
*);
5101 sections
= bfd_malloc (amt
);
5102 if (sections
== NULL
)
5105 /* Step One: Scan for segment vs section LMA conflicts.
5106 Also add the sections to the section array allocated above.
5107 Also add the sections to the current segment. In the common
5108 case, where the sections have not been moved, this means that
5109 we have completely filled the segment, and there is nothing
5115 for (j
= 0, section
= ibfd
->sections
;
5117 section
= section
->next
)
5119 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5121 output_section
= section
->output_section
;
5123 sections
[j
++] = section
;
5125 /* The Solaris native linker always sets p_paddr to 0.
5126 We try to catch that case here, and set it to the
5127 correct value. Note - some backends require that
5128 p_paddr be left as zero. */
5129 if (segment
->p_paddr
== 0
5130 && segment
->p_vaddr
!= 0
5131 && (! bed
->want_p_paddr_set_to_zero
)
5133 && output_section
->lma
!= 0
5134 && (output_section
->vma
== (segment
->p_vaddr
5135 + (map
->includes_filehdr
5138 + (map
->includes_phdrs
5140 * iehdr
->e_phentsize
)
5142 map
->p_paddr
= segment
->p_vaddr
;
5144 /* Match up the physical address of the segment with the
5145 LMA address of the output section. */
5146 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5147 || IS_COREFILE_NOTE (segment
, section
)
5148 || (bed
->want_p_paddr_set_to_zero
&&
5149 IS_CONTAINED_BY_VMA (output_section
, segment
))
5152 if (matching_lma
== 0)
5153 matching_lma
= output_section
->lma
;
5155 /* We assume that if the section fits within the segment
5156 then it does not overlap any other section within that
5158 map
->sections
[isec
++] = output_section
;
5160 else if (suggested_lma
== 0)
5161 suggested_lma
= output_section
->lma
;
5165 BFD_ASSERT (j
== section_count
);
5167 /* Step Two: Adjust the physical address of the current segment,
5169 if (isec
== section_count
)
5171 /* All of the sections fitted within the segment as currently
5172 specified. This is the default case. Add the segment to
5173 the list of built segments and carry on to process the next
5174 program header in the input BFD. */
5175 map
->count
= section_count
;
5176 *pointer_to_map
= map
;
5177 pointer_to_map
= &map
->next
;
5184 if (matching_lma
!= 0)
5186 /* At least one section fits inside the current segment.
5187 Keep it, but modify its physical address to match the
5188 LMA of the first section that fitted. */
5189 map
->p_paddr
= matching_lma
;
5193 /* None of the sections fitted inside the current segment.
5194 Change the current segment's physical address to match
5195 the LMA of the first section. */
5196 map
->p_paddr
= suggested_lma
;
5199 /* Offset the segment physical address from the lma
5200 to allow for space taken up by elf headers. */
5201 if (map
->includes_filehdr
)
5202 map
->p_paddr
-= iehdr
->e_ehsize
;
5204 if (map
->includes_phdrs
)
5206 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5208 /* iehdr->e_phnum is just an estimate of the number
5209 of program headers that we will need. Make a note
5210 here of the number we used and the segment we chose
5211 to hold these headers, so that we can adjust the
5212 offset when we know the correct value. */
5213 phdr_adjust_num
= iehdr
->e_phnum
;
5214 phdr_adjust_seg
= map
;
5218 /* Step Three: Loop over the sections again, this time assigning
5219 those that fit to the current segment and removing them from the
5220 sections array; but making sure not to leave large gaps. Once all
5221 possible sections have been assigned to the current segment it is
5222 added to the list of built segments and if sections still remain
5223 to be assigned, a new segment is constructed before repeating
5231 /* Fill the current segment with sections that fit. */
5232 for (j
= 0; j
< section_count
; j
++)
5234 section
= sections
[j
];
5236 if (section
== NULL
)
5239 output_section
= section
->output_section
;
5241 BFD_ASSERT (output_section
!= NULL
);
5243 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5244 || IS_COREFILE_NOTE (segment
, section
))
5246 if (map
->count
== 0)
5248 /* If the first section in a segment does not start at
5249 the beginning of the segment, then something is
5251 if (output_section
->lma
!=
5253 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5254 + (map
->includes_phdrs
5255 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5261 asection
* prev_sec
;
5263 prev_sec
= map
->sections
[map
->count
- 1];
5265 /* If the gap between the end of the previous section
5266 and the start of this section is more than
5267 maxpagesize then we need to start a new segment. */
5268 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5270 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5271 || ((prev_sec
->lma
+ prev_sec
->size
)
5272 > output_section
->lma
))
5274 if (suggested_lma
== 0)
5275 suggested_lma
= output_section
->lma
;
5281 map
->sections
[map
->count
++] = output_section
;
5284 section
->segment_mark
= TRUE
;
5286 else if (suggested_lma
== 0)
5287 suggested_lma
= output_section
->lma
;
5290 BFD_ASSERT (map
->count
> 0);
5292 /* Add the current segment to the list of built segments. */
5293 *pointer_to_map
= map
;
5294 pointer_to_map
= &map
->next
;
5296 if (isec
< section_count
)
5298 /* We still have not allocated all of the sections to
5299 segments. Create a new segment here, initialise it
5300 and carry on looping. */
5301 amt
= sizeof (struct elf_segment_map
);
5302 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5303 map
= bfd_alloc (obfd
, amt
);
5310 /* Initialise the fields of the segment map. Set the physical
5311 physical address to the LMA of the first section that has
5312 not yet been assigned. */
5314 map
->p_type
= segment
->p_type
;
5315 map
->p_flags
= segment
->p_flags
;
5316 map
->p_flags_valid
= 1;
5317 map
->p_paddr
= suggested_lma
;
5318 map
->p_paddr_valid
= 1;
5319 map
->includes_filehdr
= 0;
5320 map
->includes_phdrs
= 0;
5323 while (isec
< section_count
);
5328 /* The Solaris linker creates program headers in which all the
5329 p_paddr fields are zero. When we try to objcopy or strip such a
5330 file, we get confused. Check for this case, and if we find it
5331 reset the p_paddr_valid fields. */
5332 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5333 if (map
->p_paddr
!= 0)
5336 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5337 map
->p_paddr_valid
= 0;
5339 elf_tdata (obfd
)->segment_map
= map_first
;
5341 /* If we had to estimate the number of program headers that were
5342 going to be needed, then check our estimate now and adjust
5343 the offset if necessary. */
5344 if (phdr_adjust_seg
!= NULL
)
5348 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5351 if (count
> phdr_adjust_num
)
5352 phdr_adjust_seg
->p_paddr
5353 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5357 /* Final Step: Sort the segments into ascending order of physical
5359 if (map_first
!= NULL
)
5361 struct elf_segment_map
*prev
;
5364 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5366 /* Yes I know - its a bubble sort.... */
5367 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5369 /* Swap map and map->next. */
5370 prev
->next
= map
->next
;
5371 map
->next
= map
->next
->next
;
5372 prev
->next
->next
= map
;
5383 #undef IS_CONTAINED_BY_VMA
5384 #undef IS_CONTAINED_BY_LMA
5385 #undef IS_COREFILE_NOTE
5386 #undef IS_SOLARIS_PT_INTERP
5387 #undef INCLUDE_SECTION_IN_SEGMENT
5388 #undef SEGMENT_AFTER_SEGMENT
5389 #undef SEGMENT_OVERLAPS
5393 /* Copy private section information. This copies over the entsize
5394 field, and sometimes the info field. */
5397 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5402 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5404 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5405 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5408 ihdr
= &elf_section_data (isec
)->this_hdr
;
5409 ohdr
= &elf_section_data (osec
)->this_hdr
;
5411 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5413 if (ihdr
->sh_type
== SHT_SYMTAB
5414 || ihdr
->sh_type
== SHT_DYNSYM
5415 || ihdr
->sh_type
== SHT_GNU_verneed
5416 || ihdr
->sh_type
== SHT_GNU_verdef
)
5417 ohdr
->sh_info
= ihdr
->sh_info
;
5419 /* Set things up for objcopy. The output SHT_GROUP section will
5420 have its elf_next_in_group pointing back to the input group
5422 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5423 elf_group_name (osec
) = elf_group_name (isec
);
5425 osec
->use_rela_p
= isec
->use_rela_p
;
5430 /* Copy private header information. */
5433 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5435 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5436 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5439 /* Copy over private BFD data if it has not already been copied.
5440 This must be done here, rather than in the copy_private_bfd_data
5441 entry point, because the latter is called after the section
5442 contents have been set, which means that the program headers have
5443 already been worked out. */
5444 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5446 if (! copy_private_bfd_data (ibfd
, obfd
))
5453 /* Copy private symbol information. If this symbol is in a section
5454 which we did not map into a BFD section, try to map the section
5455 index correctly. We use special macro definitions for the mapped
5456 section indices; these definitions are interpreted by the
5457 swap_out_syms function. */
5459 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5460 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5461 #define MAP_STRTAB (SHN_HIOS + 3)
5462 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5463 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5466 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5471 elf_symbol_type
*isym
, *osym
;
5473 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5474 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5477 isym
= elf_symbol_from (ibfd
, isymarg
);
5478 osym
= elf_symbol_from (obfd
, osymarg
);
5482 && bfd_is_abs_section (isym
->symbol
.section
))
5486 shndx
= isym
->internal_elf_sym
.st_shndx
;
5487 if (shndx
== elf_onesymtab (ibfd
))
5488 shndx
= MAP_ONESYMTAB
;
5489 else if (shndx
== elf_dynsymtab (ibfd
))
5490 shndx
= MAP_DYNSYMTAB
;
5491 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5493 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5494 shndx
= MAP_SHSTRTAB
;
5495 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5496 shndx
= MAP_SYM_SHNDX
;
5497 osym
->internal_elf_sym
.st_shndx
= shndx
;
5503 /* Swap out the symbols. */
5506 swap_out_syms (bfd
*abfd
,
5507 struct bfd_strtab_hash
**sttp
,
5510 const struct elf_backend_data
*bed
;
5513 struct bfd_strtab_hash
*stt
;
5514 Elf_Internal_Shdr
*symtab_hdr
;
5515 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5516 Elf_Internal_Shdr
*symstrtab_hdr
;
5517 char *outbound_syms
;
5518 char *outbound_shndx
;
5521 bfd_boolean name_local_sections
;
5523 if (!elf_map_symbols (abfd
))
5526 /* Dump out the symtabs. */
5527 stt
= _bfd_elf_stringtab_init ();
5531 bed
= get_elf_backend_data (abfd
);
5532 symcount
= bfd_get_symcount (abfd
);
5533 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5534 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5535 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5536 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5537 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5538 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5540 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5541 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5543 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5544 outbound_syms
= bfd_alloc (abfd
, amt
);
5545 if (outbound_syms
== NULL
)
5547 _bfd_stringtab_free (stt
);
5550 symtab_hdr
->contents
= outbound_syms
;
5552 outbound_shndx
= NULL
;
5553 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5554 if (symtab_shndx_hdr
->sh_name
!= 0)
5556 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5557 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5558 if (outbound_shndx
== NULL
)
5560 _bfd_stringtab_free (stt
);
5564 symtab_shndx_hdr
->contents
= outbound_shndx
;
5565 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5566 symtab_shndx_hdr
->sh_size
= amt
;
5567 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5568 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5571 /* Now generate the data (for "contents"). */
5573 /* Fill in zeroth symbol and swap it out. */
5574 Elf_Internal_Sym sym
;
5580 sym
.st_shndx
= SHN_UNDEF
;
5581 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5582 outbound_syms
+= bed
->s
->sizeof_sym
;
5583 if (outbound_shndx
!= NULL
)
5584 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5588 = (bed
->elf_backend_name_local_section_symbols
5589 && bed
->elf_backend_name_local_section_symbols (abfd
));
5591 syms
= bfd_get_outsymbols (abfd
);
5592 for (idx
= 0; idx
< symcount
; idx
++)
5594 Elf_Internal_Sym sym
;
5595 bfd_vma value
= syms
[idx
]->value
;
5596 elf_symbol_type
*type_ptr
;
5597 flagword flags
= syms
[idx
]->flags
;
5600 if (!name_local_sections
5601 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5603 /* Local section symbols have no name. */
5608 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5611 if (sym
.st_name
== (unsigned long) -1)
5613 _bfd_stringtab_free (stt
);
5618 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5620 if ((flags
& BSF_SECTION_SYM
) == 0
5621 && bfd_is_com_section (syms
[idx
]->section
))
5623 /* ELF common symbols put the alignment into the `value' field,
5624 and the size into the `size' field. This is backwards from
5625 how BFD handles it, so reverse it here. */
5626 sym
.st_size
= value
;
5627 if (type_ptr
== NULL
5628 || type_ptr
->internal_elf_sym
.st_value
== 0)
5629 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5631 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5632 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5633 (abfd
, syms
[idx
]->section
);
5637 asection
*sec
= syms
[idx
]->section
;
5640 if (sec
->output_section
)
5642 value
+= sec
->output_offset
;
5643 sec
= sec
->output_section
;
5646 /* Don't add in the section vma for relocatable output. */
5647 if (! relocatable_p
)
5649 sym
.st_value
= value
;
5650 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5652 if (bfd_is_abs_section (sec
)
5654 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5656 /* This symbol is in a real ELF section which we did
5657 not create as a BFD section. Undo the mapping done
5658 by copy_private_symbol_data. */
5659 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5663 shndx
= elf_onesymtab (abfd
);
5666 shndx
= elf_dynsymtab (abfd
);
5669 shndx
= elf_tdata (abfd
)->strtab_section
;
5672 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5675 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5683 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5689 /* Writing this would be a hell of a lot easier if
5690 we had some decent documentation on bfd, and
5691 knew what to expect of the library, and what to
5692 demand of applications. For example, it
5693 appears that `objcopy' might not set the
5694 section of a symbol to be a section that is
5695 actually in the output file. */
5696 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5699 _bfd_error_handler (_("\
5700 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5701 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5703 bfd_set_error (bfd_error_invalid_operation
);
5704 _bfd_stringtab_free (stt
);
5708 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5709 BFD_ASSERT (shndx
!= -1);
5713 sym
.st_shndx
= shndx
;
5716 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5718 else if ((flags
& BSF_FUNCTION
) != 0)
5720 else if ((flags
& BSF_OBJECT
) != 0)
5725 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5728 /* Processor-specific types. */
5729 if (type_ptr
!= NULL
5730 && bed
->elf_backend_get_symbol_type
)
5731 type
= ((*bed
->elf_backend_get_symbol_type
)
5732 (&type_ptr
->internal_elf_sym
, type
));
5734 if (flags
& BSF_SECTION_SYM
)
5736 if (flags
& BSF_GLOBAL
)
5737 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5739 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5741 else if (bfd_is_com_section (syms
[idx
]->section
))
5742 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5743 else if (bfd_is_und_section (syms
[idx
]->section
))
5744 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5748 else if (flags
& BSF_FILE
)
5749 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5752 int bind
= STB_LOCAL
;
5754 if (flags
& BSF_LOCAL
)
5756 else if (flags
& BSF_WEAK
)
5758 else if (flags
& BSF_GLOBAL
)
5761 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5764 if (type_ptr
!= NULL
)
5765 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5769 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5770 outbound_syms
+= bed
->s
->sizeof_sym
;
5771 if (outbound_shndx
!= NULL
)
5772 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5776 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5777 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5779 symstrtab_hdr
->sh_flags
= 0;
5780 symstrtab_hdr
->sh_addr
= 0;
5781 symstrtab_hdr
->sh_entsize
= 0;
5782 symstrtab_hdr
->sh_link
= 0;
5783 symstrtab_hdr
->sh_info
= 0;
5784 symstrtab_hdr
->sh_addralign
= 1;
5789 /* Return the number of bytes required to hold the symtab vector.
5791 Note that we base it on the count plus 1, since we will null terminate
5792 the vector allocated based on this size. However, the ELF symbol table
5793 always has a dummy entry as symbol #0, so it ends up even. */
5796 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5800 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5802 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5803 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5805 symtab_size
-= sizeof (asymbol
*);
5811 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5815 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5817 if (elf_dynsymtab (abfd
) == 0)
5819 bfd_set_error (bfd_error_invalid_operation
);
5823 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5824 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5826 symtab_size
-= sizeof (asymbol
*);
5832 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5835 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5838 /* Canonicalize the relocs. */
5841 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5848 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5850 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5853 tblptr
= section
->relocation
;
5854 for (i
= 0; i
< section
->reloc_count
; i
++)
5855 *relptr
++ = tblptr
++;
5859 return section
->reloc_count
;
5863 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5865 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5866 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5869 bfd_get_symcount (abfd
) = symcount
;
5874 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5875 asymbol
**allocation
)
5877 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5878 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5881 bfd_get_dynamic_symcount (abfd
) = symcount
;
5885 /* Return the size required for the dynamic reloc entries. Any
5886 section that was actually installed in the BFD, and has type
5887 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5888 considered to be a dynamic reloc section. */
5891 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5896 if (elf_dynsymtab (abfd
) == 0)
5898 bfd_set_error (bfd_error_invalid_operation
);
5902 ret
= sizeof (arelent
*);
5903 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5904 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5905 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5906 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5907 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5908 * sizeof (arelent
*));
5913 /* Canonicalize the dynamic relocation entries. Note that we return
5914 the dynamic relocations as a single block, although they are
5915 actually associated with particular sections; the interface, which
5916 was designed for SunOS style shared libraries, expects that there
5917 is only one set of dynamic relocs. Any section that was actually
5918 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5919 the dynamic symbol table, is considered to be a dynamic reloc
5923 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
5927 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5931 if (elf_dynsymtab (abfd
) == 0)
5933 bfd_set_error (bfd_error_invalid_operation
);
5937 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5939 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5941 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5942 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5943 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5948 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
5950 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5952 for (i
= 0; i
< count
; i
++)
5963 /* Read in the version information. */
5966 _bfd_elf_slurp_version_tables (bfd
*abfd
)
5968 bfd_byte
*contents
= NULL
;
5971 if (elf_dynverdef (abfd
) != 0)
5973 Elf_Internal_Shdr
*hdr
;
5974 Elf_External_Verdef
*everdef
;
5975 Elf_Internal_Verdef
*iverdef
;
5976 Elf_Internal_Verdef
*iverdefarr
;
5977 Elf_Internal_Verdef iverdefmem
;
5979 unsigned int maxidx
;
5981 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5983 contents
= bfd_malloc (hdr
->sh_size
);
5984 if (contents
== NULL
)
5986 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5987 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5990 /* We know the number of entries in the section but not the maximum
5991 index. Therefore we have to run through all entries and find
5993 everdef
= (Elf_External_Verdef
*) contents
;
5995 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5997 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5999 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6000 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6002 everdef
= ((Elf_External_Verdef
*)
6003 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6006 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6007 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6008 if (elf_tdata (abfd
)->verdef
== NULL
)
6011 elf_tdata (abfd
)->cverdefs
= maxidx
;
6013 everdef
= (Elf_External_Verdef
*) contents
;
6014 iverdefarr
= elf_tdata (abfd
)->verdef
;
6015 for (i
= 0; i
< hdr
->sh_info
; i
++)
6017 Elf_External_Verdaux
*everdaux
;
6018 Elf_Internal_Verdaux
*iverdaux
;
6021 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6023 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6024 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6026 iverdef
->vd_bfd
= abfd
;
6028 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6029 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6030 if (iverdef
->vd_auxptr
== NULL
)
6033 everdaux
= ((Elf_External_Verdaux
*)
6034 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6035 iverdaux
= iverdef
->vd_auxptr
;
6036 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6038 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6040 iverdaux
->vda_nodename
=
6041 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6042 iverdaux
->vda_name
);
6043 if (iverdaux
->vda_nodename
== NULL
)
6046 if (j
+ 1 < iverdef
->vd_cnt
)
6047 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6049 iverdaux
->vda_nextptr
= NULL
;
6051 everdaux
= ((Elf_External_Verdaux
*)
6052 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6055 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6057 if (i
+ 1 < hdr
->sh_info
)
6058 iverdef
->vd_nextdef
= iverdef
+ 1;
6060 iverdef
->vd_nextdef
= NULL
;
6062 everdef
= ((Elf_External_Verdef
*)
6063 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6070 if (elf_dynverref (abfd
) != 0)
6072 Elf_Internal_Shdr
*hdr
;
6073 Elf_External_Verneed
*everneed
;
6074 Elf_Internal_Verneed
*iverneed
;
6077 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6079 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6080 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6081 if (elf_tdata (abfd
)->verref
== NULL
)
6084 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6086 contents
= bfd_malloc (hdr
->sh_size
);
6087 if (contents
== NULL
)
6089 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6090 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6093 everneed
= (Elf_External_Verneed
*) contents
;
6094 iverneed
= elf_tdata (abfd
)->verref
;
6095 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6097 Elf_External_Vernaux
*evernaux
;
6098 Elf_Internal_Vernaux
*ivernaux
;
6101 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6103 iverneed
->vn_bfd
= abfd
;
6105 iverneed
->vn_filename
=
6106 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6108 if (iverneed
->vn_filename
== NULL
)
6111 amt
= iverneed
->vn_cnt
;
6112 amt
*= sizeof (Elf_Internal_Vernaux
);
6113 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6115 evernaux
= ((Elf_External_Vernaux
*)
6116 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6117 ivernaux
= iverneed
->vn_auxptr
;
6118 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6120 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6122 ivernaux
->vna_nodename
=
6123 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6124 ivernaux
->vna_name
);
6125 if (ivernaux
->vna_nodename
== NULL
)
6128 if (j
+ 1 < iverneed
->vn_cnt
)
6129 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6131 ivernaux
->vna_nextptr
= NULL
;
6133 evernaux
= ((Elf_External_Vernaux
*)
6134 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6137 if (i
+ 1 < hdr
->sh_info
)
6138 iverneed
->vn_nextref
= iverneed
+ 1;
6140 iverneed
->vn_nextref
= NULL
;
6142 everneed
= ((Elf_External_Verneed
*)
6143 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6153 if (contents
!= NULL
)
6159 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6161 elf_symbol_type
*newsym
;
6162 bfd_size_type amt
= sizeof (elf_symbol_type
);
6164 newsym
= bfd_zalloc (abfd
, amt
);
6169 newsym
->symbol
.the_bfd
= abfd
;
6170 return &newsym
->symbol
;
6175 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6179 bfd_symbol_info (symbol
, ret
);
6182 /* Return whether a symbol name implies a local symbol. Most targets
6183 use this function for the is_local_label_name entry point, but some
6187 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6190 /* Normal local symbols start with ``.L''. */
6191 if (name
[0] == '.' && name
[1] == 'L')
6194 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6195 DWARF debugging symbols starting with ``..''. */
6196 if (name
[0] == '.' && name
[1] == '.')
6199 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6200 emitting DWARF debugging output. I suspect this is actually a
6201 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6202 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6203 underscore to be emitted on some ELF targets). For ease of use,
6204 we treat such symbols as local. */
6205 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6212 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6213 asymbol
*symbol ATTRIBUTE_UNUSED
)
6220 _bfd_elf_set_arch_mach (bfd
*abfd
,
6221 enum bfd_architecture arch
,
6222 unsigned long machine
)
6224 /* If this isn't the right architecture for this backend, and this
6225 isn't the generic backend, fail. */
6226 if (arch
!= get_elf_backend_data (abfd
)->arch
6227 && arch
!= bfd_arch_unknown
6228 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6231 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6234 /* Find the function to a particular section and offset,
6235 for error reporting. */
6238 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6242 const char **filename_ptr
,
6243 const char **functionname_ptr
)
6245 const char *filename
;
6254 for (p
= symbols
; *p
!= NULL
; p
++)
6258 q
= (elf_symbol_type
*) *p
;
6260 if (bfd_get_section (&q
->symbol
) != section
)
6263 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6268 filename
= bfd_asymbol_name (&q
->symbol
);
6272 if (q
->symbol
.section
== section
6273 && q
->symbol
.value
>= low_func
6274 && q
->symbol
.value
<= offset
)
6276 func
= (asymbol
*) q
;
6277 low_func
= q
->symbol
.value
;
6287 *filename_ptr
= filename
;
6288 if (functionname_ptr
)
6289 *functionname_ptr
= bfd_asymbol_name (func
);
6294 /* Find the nearest line to a particular section and offset,
6295 for error reporting. */
6298 _bfd_elf_find_nearest_line (bfd
*abfd
,
6302 const char **filename_ptr
,
6303 const char **functionname_ptr
,
6304 unsigned int *line_ptr
)
6308 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6309 filename_ptr
, functionname_ptr
,
6312 if (!*functionname_ptr
)
6313 elf_find_function (abfd
, section
, symbols
, offset
,
6314 *filename_ptr
? NULL
: filename_ptr
,
6320 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6321 filename_ptr
, functionname_ptr
,
6323 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6325 if (!*functionname_ptr
)
6326 elf_find_function (abfd
, section
, symbols
, offset
,
6327 *filename_ptr
? NULL
: filename_ptr
,
6333 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6334 &found
, filename_ptr
,
6335 functionname_ptr
, line_ptr
,
6336 &elf_tdata (abfd
)->line_info
))
6338 if (found
&& (*functionname_ptr
|| *line_ptr
))
6341 if (symbols
== NULL
)
6344 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6345 filename_ptr
, functionname_ptr
))
6353 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6357 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6359 ret
+= get_program_header_size (abfd
);
6364 _bfd_elf_set_section_contents (bfd
*abfd
,
6366 const void *location
,
6368 bfd_size_type count
)
6370 Elf_Internal_Shdr
*hdr
;
6373 if (! abfd
->output_has_begun
6374 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6377 hdr
= &elf_section_data (section
)->this_hdr
;
6378 pos
= hdr
->sh_offset
+ offset
;
6379 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6380 || bfd_bwrite (location
, count
, abfd
) != count
)
6387 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6388 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6389 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6394 /* Try to convert a non-ELF reloc into an ELF one. */
6397 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6399 /* Check whether we really have an ELF howto. */
6401 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6403 bfd_reloc_code_real_type code
;
6404 reloc_howto_type
*howto
;
6406 /* Alien reloc: Try to determine its type to replace it with an
6407 equivalent ELF reloc. */
6409 if (areloc
->howto
->pc_relative
)
6411 switch (areloc
->howto
->bitsize
)
6414 code
= BFD_RELOC_8_PCREL
;
6417 code
= BFD_RELOC_12_PCREL
;
6420 code
= BFD_RELOC_16_PCREL
;
6423 code
= BFD_RELOC_24_PCREL
;
6426 code
= BFD_RELOC_32_PCREL
;
6429 code
= BFD_RELOC_64_PCREL
;
6435 howto
= bfd_reloc_type_lookup (abfd
, code
);
6437 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6439 if (howto
->pcrel_offset
)
6440 areloc
->addend
+= areloc
->address
;
6442 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6447 switch (areloc
->howto
->bitsize
)
6453 code
= BFD_RELOC_14
;
6456 code
= BFD_RELOC_16
;
6459 code
= BFD_RELOC_26
;
6462 code
= BFD_RELOC_32
;
6465 code
= BFD_RELOC_64
;
6471 howto
= bfd_reloc_type_lookup (abfd
, code
);
6475 areloc
->howto
= howto
;
6483 (*_bfd_error_handler
)
6484 (_("%s: unsupported relocation type %s"),
6485 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6486 bfd_set_error (bfd_error_bad_value
);
6491 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6493 if (bfd_get_format (abfd
) == bfd_object
)
6495 if (elf_shstrtab (abfd
) != NULL
)
6496 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6499 return _bfd_generic_close_and_cleanup (abfd
);
6502 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6503 in the relocation's offset. Thus we cannot allow any sort of sanity
6504 range-checking to interfere. There is nothing else to do in processing
6507 bfd_reloc_status_type
6508 _bfd_elf_rel_vtable_reloc_fn
6509 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6510 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6511 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6512 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6514 return bfd_reloc_ok
;
6517 /* Elf core file support. Much of this only works on native
6518 toolchains, since we rely on knowing the
6519 machine-dependent procfs structure in order to pick
6520 out details about the corefile. */
6522 #ifdef HAVE_SYS_PROCFS_H
6523 # include <sys/procfs.h>
6526 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6529 elfcore_make_pid (bfd
*abfd
)
6531 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6532 + (elf_tdata (abfd
)->core_pid
));
6535 /* If there isn't a section called NAME, make one, using
6536 data from SECT. Note, this function will generate a
6537 reference to NAME, so you shouldn't deallocate or
6541 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6545 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6548 sect2
= bfd_make_section (abfd
, name
);
6552 sect2
->size
= sect
->size
;
6553 sect2
->filepos
= sect
->filepos
;
6554 sect2
->flags
= sect
->flags
;
6555 sect2
->alignment_power
= sect
->alignment_power
;
6559 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6560 actually creates up to two pseudosections:
6561 - For the single-threaded case, a section named NAME, unless
6562 such a section already exists.
6563 - For the multi-threaded case, a section named "NAME/PID", where
6564 PID is elfcore_make_pid (abfd).
6565 Both pseudosections have identical contents. */
6567 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6573 char *threaded_name
;
6577 /* Build the section name. */
6579 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6580 len
= strlen (buf
) + 1;
6581 threaded_name
= bfd_alloc (abfd
, len
);
6582 if (threaded_name
== NULL
)
6584 memcpy (threaded_name
, buf
, len
);
6586 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6590 sect
->filepos
= filepos
;
6591 sect
->flags
= SEC_HAS_CONTENTS
;
6592 sect
->alignment_power
= 2;
6594 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6597 /* prstatus_t exists on:
6599 linux 2.[01] + glibc
6603 #if defined (HAVE_PRSTATUS_T)
6606 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6611 if (note
->descsz
== sizeof (prstatus_t
))
6615 size
= sizeof (prstat
.pr_reg
);
6616 offset
= offsetof (prstatus_t
, pr_reg
);
6617 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6619 /* Do not overwrite the core signal if it
6620 has already been set by another thread. */
6621 if (elf_tdata (abfd
)->core_signal
== 0)
6622 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6623 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6625 /* pr_who exists on:
6628 pr_who doesn't exist on:
6631 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6632 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6635 #if defined (HAVE_PRSTATUS32_T)
6636 else if (note
->descsz
== sizeof (prstatus32_t
))
6638 /* 64-bit host, 32-bit corefile */
6639 prstatus32_t prstat
;
6641 size
= sizeof (prstat
.pr_reg
);
6642 offset
= offsetof (prstatus32_t
, pr_reg
);
6643 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6645 /* Do not overwrite the core signal if it
6646 has already been set by another thread. */
6647 if (elf_tdata (abfd
)->core_signal
== 0)
6648 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6649 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6651 /* pr_who exists on:
6654 pr_who doesn't exist on:
6657 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6658 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6661 #endif /* HAVE_PRSTATUS32_T */
6664 /* Fail - we don't know how to handle any other
6665 note size (ie. data object type). */
6669 /* Make a ".reg/999" section and a ".reg" section. */
6670 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6671 size
, note
->descpos
+ offset
);
6673 #endif /* defined (HAVE_PRSTATUS_T) */
6675 /* Create a pseudosection containing the exact contents of NOTE. */
6677 elfcore_make_note_pseudosection (bfd
*abfd
,
6679 Elf_Internal_Note
*note
)
6681 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6682 note
->descsz
, note
->descpos
);
6685 /* There isn't a consistent prfpregset_t across platforms,
6686 but it doesn't matter, because we don't have to pick this
6687 data structure apart. */
6690 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6692 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6695 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6696 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6700 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6702 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6705 #if defined (HAVE_PRPSINFO_T)
6706 typedef prpsinfo_t elfcore_psinfo_t
;
6707 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6708 typedef prpsinfo32_t elfcore_psinfo32_t
;
6712 #if defined (HAVE_PSINFO_T)
6713 typedef psinfo_t elfcore_psinfo_t
;
6714 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6715 typedef psinfo32_t elfcore_psinfo32_t
;
6719 /* return a malloc'ed copy of a string at START which is at
6720 most MAX bytes long, possibly without a terminating '\0'.
6721 the copy will always have a terminating '\0'. */
6724 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6727 char *end
= memchr (start
, '\0', max
);
6735 dups
= bfd_alloc (abfd
, len
+ 1);
6739 memcpy (dups
, start
, len
);
6745 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6747 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6749 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6751 elfcore_psinfo_t psinfo
;
6753 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6755 elf_tdata (abfd
)->core_program
6756 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6757 sizeof (psinfo
.pr_fname
));
6759 elf_tdata (abfd
)->core_command
6760 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6761 sizeof (psinfo
.pr_psargs
));
6763 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6764 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6766 /* 64-bit host, 32-bit corefile */
6767 elfcore_psinfo32_t psinfo
;
6769 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6771 elf_tdata (abfd
)->core_program
6772 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6773 sizeof (psinfo
.pr_fname
));
6775 elf_tdata (abfd
)->core_command
6776 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6777 sizeof (psinfo
.pr_psargs
));
6783 /* Fail - we don't know how to handle any other
6784 note size (ie. data object type). */
6788 /* Note that for some reason, a spurious space is tacked
6789 onto the end of the args in some (at least one anyway)
6790 implementations, so strip it off if it exists. */
6793 char *command
= elf_tdata (abfd
)->core_command
;
6794 int n
= strlen (command
);
6796 if (0 < n
&& command
[n
- 1] == ' ')
6797 command
[n
- 1] = '\0';
6802 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6804 #if defined (HAVE_PSTATUS_T)
6806 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6808 if (note
->descsz
== sizeof (pstatus_t
)
6809 #if defined (HAVE_PXSTATUS_T)
6810 || note
->descsz
== sizeof (pxstatus_t
)
6816 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6818 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6820 #if defined (HAVE_PSTATUS32_T)
6821 else if (note
->descsz
== sizeof (pstatus32_t
))
6823 /* 64-bit host, 32-bit corefile */
6826 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6828 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6831 /* Could grab some more details from the "representative"
6832 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6833 NT_LWPSTATUS note, presumably. */
6837 #endif /* defined (HAVE_PSTATUS_T) */
6839 #if defined (HAVE_LWPSTATUS_T)
6841 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6843 lwpstatus_t lwpstat
;
6849 if (note
->descsz
!= sizeof (lwpstat
)
6850 #if defined (HAVE_LWPXSTATUS_T)
6851 && note
->descsz
!= sizeof (lwpxstatus_t
)
6856 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6858 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6859 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6861 /* Make a ".reg/999" section. */
6863 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6864 len
= strlen (buf
) + 1;
6865 name
= bfd_alloc (abfd
, len
);
6868 memcpy (name
, buf
, len
);
6870 sect
= bfd_make_section_anyway (abfd
, name
);
6874 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6875 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6876 sect
->filepos
= note
->descpos
6877 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6880 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6881 sect
->size
= sizeof (lwpstat
.pr_reg
);
6882 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6885 sect
->flags
= SEC_HAS_CONTENTS
;
6886 sect
->alignment_power
= 2;
6888 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6891 /* Make a ".reg2/999" section */
6893 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6894 len
= strlen (buf
) + 1;
6895 name
= bfd_alloc (abfd
, len
);
6898 memcpy (name
, buf
, len
);
6900 sect
= bfd_make_section_anyway (abfd
, name
);
6904 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6905 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6906 sect
->filepos
= note
->descpos
6907 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6910 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6911 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
6912 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6915 sect
->flags
= SEC_HAS_CONTENTS
;
6916 sect
->alignment_power
= 2;
6918 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6920 #endif /* defined (HAVE_LWPSTATUS_T) */
6922 #if defined (HAVE_WIN32_PSTATUS_T)
6924 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6930 win32_pstatus_t pstatus
;
6932 if (note
->descsz
< sizeof (pstatus
))
6935 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6937 switch (pstatus
.data_type
)
6939 case NOTE_INFO_PROCESS
:
6940 /* FIXME: need to add ->core_command. */
6941 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6942 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6945 case NOTE_INFO_THREAD
:
6946 /* Make a ".reg/999" section. */
6947 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6949 len
= strlen (buf
) + 1;
6950 name
= bfd_alloc (abfd
, len
);
6954 memcpy (name
, buf
, len
);
6956 sect
= bfd_make_section_anyway (abfd
, name
);
6960 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6961 sect
->filepos
= (note
->descpos
6962 + offsetof (struct win32_pstatus
,
6963 data
.thread_info
.thread_context
));
6964 sect
->flags
= SEC_HAS_CONTENTS
;
6965 sect
->alignment_power
= 2;
6967 if (pstatus
.data
.thread_info
.is_active_thread
)
6968 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6972 case NOTE_INFO_MODULE
:
6973 /* Make a ".module/xxxxxxxx" section. */
6974 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6976 len
= strlen (buf
) + 1;
6977 name
= bfd_alloc (abfd
, len
);
6981 memcpy (name
, buf
, len
);
6983 sect
= bfd_make_section_anyway (abfd
, name
);
6988 sect
->size
= note
->descsz
;
6989 sect
->filepos
= note
->descpos
;
6990 sect
->flags
= SEC_HAS_CONTENTS
;
6991 sect
->alignment_power
= 2;
7000 #endif /* HAVE_WIN32_PSTATUS_T */
7003 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7005 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7013 if (bed
->elf_backend_grok_prstatus
)
7014 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7016 #if defined (HAVE_PRSTATUS_T)
7017 return elfcore_grok_prstatus (abfd
, note
);
7022 #if defined (HAVE_PSTATUS_T)
7024 return elfcore_grok_pstatus (abfd
, note
);
7027 #if defined (HAVE_LWPSTATUS_T)
7029 return elfcore_grok_lwpstatus (abfd
, note
);
7032 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7033 return elfcore_grok_prfpreg (abfd
, note
);
7035 #if defined (HAVE_WIN32_PSTATUS_T)
7036 case NT_WIN32PSTATUS
:
7037 return elfcore_grok_win32pstatus (abfd
, note
);
7040 case NT_PRXFPREG
: /* Linux SSE extension */
7041 if (note
->namesz
== 6
7042 && strcmp (note
->namedata
, "LINUX") == 0)
7043 return elfcore_grok_prxfpreg (abfd
, note
);
7049 if (bed
->elf_backend_grok_psinfo
)
7050 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7052 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7053 return elfcore_grok_psinfo (abfd
, note
);
7060 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7064 sect
->size
= note
->descsz
;
7065 sect
->filepos
= note
->descpos
;
7066 sect
->flags
= SEC_HAS_CONTENTS
;
7067 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7075 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7079 cp
= strchr (note
->namedata
, '@');
7082 *lwpidp
= atoi(cp
+ 1);
7089 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7092 /* Signal number at offset 0x08. */
7093 elf_tdata (abfd
)->core_signal
7094 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7096 /* Process ID at offset 0x50. */
7097 elf_tdata (abfd
)->core_pid
7098 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7100 /* Command name at 0x7c (max 32 bytes, including nul). */
7101 elf_tdata (abfd
)->core_command
7102 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7104 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7109 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7113 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7114 elf_tdata (abfd
)->core_lwpid
= lwp
;
7116 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7118 /* NetBSD-specific core "procinfo". Note that we expect to
7119 find this note before any of the others, which is fine,
7120 since the kernel writes this note out first when it
7121 creates a core file. */
7123 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7126 /* As of Jan 2002 there are no other machine-independent notes
7127 defined for NetBSD core files. If the note type is less
7128 than the start of the machine-dependent note types, we don't
7131 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7135 switch (bfd_get_arch (abfd
))
7137 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7138 PT_GETFPREGS == mach+2. */
7140 case bfd_arch_alpha
:
7141 case bfd_arch_sparc
:
7144 case NT_NETBSDCORE_FIRSTMACH
+0:
7145 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7147 case NT_NETBSDCORE_FIRSTMACH
+2:
7148 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7154 /* On all other arch's, PT_GETREGS == mach+1 and
7155 PT_GETFPREGS == mach+3. */
7160 case NT_NETBSDCORE_FIRSTMACH
+1:
7161 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7163 case NT_NETBSDCORE_FIRSTMACH
+3:
7164 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7174 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7176 void *ddata
= note
->descdata
;
7183 /* nto_procfs_status 'pid' field is at offset 0. */
7184 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7186 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7187 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7189 /* nto_procfs_status 'flags' field is at offset 8. */
7190 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7192 /* nto_procfs_status 'what' field is at offset 14. */
7193 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7195 elf_tdata (abfd
)->core_signal
= sig
;
7196 elf_tdata (abfd
)->core_lwpid
= *tid
;
7199 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7200 do not come from signals so we make sure we set the current
7201 thread just in case. */
7202 if (flags
& 0x00000080)
7203 elf_tdata (abfd
)->core_lwpid
= *tid
;
7205 /* Make a ".qnx_core_status/%d" section. */
7206 sprintf (buf
, ".qnx_core_status/%d", *tid
);
7208 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7213 sect
= bfd_make_section_anyway (abfd
, name
);
7217 sect
->size
= note
->descsz
;
7218 sect
->filepos
= note
->descpos
;
7219 sect
->flags
= SEC_HAS_CONTENTS
;
7220 sect
->alignment_power
= 2;
7222 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7226 elfcore_grok_nto_gregs (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t tid
)
7232 /* Make a ".reg/%d" section. */
7233 sprintf (buf
, ".reg/%d", tid
);
7235 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7240 sect
= bfd_make_section_anyway (abfd
, name
);
7244 sect
->size
= note
->descsz
;
7245 sect
->filepos
= note
->descpos
;
7246 sect
->flags
= SEC_HAS_CONTENTS
;
7247 sect
->alignment_power
= 2;
7249 /* This is the current thread. */
7250 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7251 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7256 #define BFD_QNT_CORE_INFO 7
7257 #define BFD_QNT_CORE_STATUS 8
7258 #define BFD_QNT_CORE_GREG 9
7259 #define BFD_QNT_CORE_FPREG 10
7262 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7264 /* Every GREG section has a STATUS section before it. Store the
7265 tid from the previous call to pass down to the next gregs
7267 static pid_t tid
= 1;
7271 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7272 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7273 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7274 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7275 default: return TRUE
;
7279 /* Function: elfcore_write_note
7286 size of data for note
7289 End of buffer containing note. */
7292 elfcore_write_note (bfd
*abfd
,
7300 Elf_External_Note
*xnp
;
7310 const struct elf_backend_data
*bed
;
7312 namesz
= strlen (name
) + 1;
7313 bed
= get_elf_backend_data (abfd
);
7314 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7317 newspace
= 12 + namesz
+ pad
+ size
;
7319 p
= realloc (buf
, *bufsiz
+ newspace
);
7321 *bufsiz
+= newspace
;
7322 xnp
= (Elf_External_Note
*) dest
;
7323 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7324 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7325 H_PUT_32 (abfd
, type
, xnp
->type
);
7329 memcpy (dest
, name
, namesz
);
7337 memcpy (dest
, input
, size
);
7341 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7343 elfcore_write_prpsinfo (bfd
*abfd
,
7350 char *note_name
= "CORE";
7352 #if defined (HAVE_PSINFO_T)
7354 note_type
= NT_PSINFO
;
7357 note_type
= NT_PRPSINFO
;
7360 memset (&data
, 0, sizeof (data
));
7361 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7362 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7363 return elfcore_write_note (abfd
, buf
, bufsiz
,
7364 note_name
, note_type
, &data
, sizeof (data
));
7366 #endif /* PSINFO_T or PRPSINFO_T */
7368 #if defined (HAVE_PRSTATUS_T)
7370 elfcore_write_prstatus (bfd
*abfd
,
7378 char *note_name
= "CORE";
7380 memset (&prstat
, 0, sizeof (prstat
));
7381 prstat
.pr_pid
= pid
;
7382 prstat
.pr_cursig
= cursig
;
7383 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7384 return elfcore_write_note (abfd
, buf
, bufsiz
,
7385 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7387 #endif /* HAVE_PRSTATUS_T */
7389 #if defined (HAVE_LWPSTATUS_T)
7391 elfcore_write_lwpstatus (bfd
*abfd
,
7398 lwpstatus_t lwpstat
;
7399 char *note_name
= "CORE";
7401 memset (&lwpstat
, 0, sizeof (lwpstat
));
7402 lwpstat
.pr_lwpid
= pid
>> 16;
7403 lwpstat
.pr_cursig
= cursig
;
7404 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7405 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7406 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7408 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7409 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7411 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7412 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7415 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7416 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7418 #endif /* HAVE_LWPSTATUS_T */
7420 #if defined (HAVE_PSTATUS_T)
7422 elfcore_write_pstatus (bfd
*abfd
,
7430 char *note_name
= "CORE";
7432 memset (&pstat
, 0, sizeof (pstat
));
7433 pstat
.pr_pid
= pid
& 0xffff;
7434 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7435 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7438 #endif /* HAVE_PSTATUS_T */
7441 elfcore_write_prfpreg (bfd
*abfd
,
7447 char *note_name
= "CORE";
7448 return elfcore_write_note (abfd
, buf
, bufsiz
,
7449 note_name
, NT_FPREGSET
, fpregs
, size
);
7453 elfcore_write_prxfpreg (bfd
*abfd
,
7456 const void *xfpregs
,
7459 char *note_name
= "LINUX";
7460 return elfcore_write_note (abfd
, buf
, bufsiz
,
7461 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7465 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7473 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7476 buf
= bfd_malloc (size
);
7480 if (bfd_bread (buf
, size
, abfd
) != size
)
7488 while (p
< buf
+ size
)
7490 /* FIXME: bad alignment assumption. */
7491 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7492 Elf_Internal_Note in
;
7494 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7496 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7497 in
.namedata
= xnp
->name
;
7499 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7500 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7501 in
.descpos
= offset
+ (in
.descdata
- buf
);
7503 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7505 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7508 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7510 if (! elfcore_grok_nto_note (abfd
, &in
))
7515 if (! elfcore_grok_note (abfd
, &in
))
7519 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7526 /* Providing external access to the ELF program header table. */
7528 /* Return an upper bound on the number of bytes required to store a
7529 copy of ABFD's program header table entries. Return -1 if an error
7530 occurs; bfd_get_error will return an appropriate code. */
7533 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7535 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7537 bfd_set_error (bfd_error_wrong_format
);
7541 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7544 /* Copy ABFD's program header table entries to *PHDRS. The entries
7545 will be stored as an array of Elf_Internal_Phdr structures, as
7546 defined in include/elf/internal.h. To find out how large the
7547 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7549 Return the number of program header table entries read, or -1 if an
7550 error occurs; bfd_get_error will return an appropriate code. */
7553 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7557 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7559 bfd_set_error (bfd_error_wrong_format
);
7563 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7564 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7565 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7571 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7574 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7576 i_ehdrp
= elf_elfheader (abfd
);
7577 if (i_ehdrp
== NULL
)
7578 sprintf_vma (buf
, value
);
7581 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7583 #if BFD_HOST_64BIT_LONG
7584 sprintf (buf
, "%016lx", value
);
7586 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7587 _bfd_int64_low (value
));
7591 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7594 sprintf_vma (buf
, value
);
7599 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7602 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7604 i_ehdrp
= elf_elfheader (abfd
);
7605 if (i_ehdrp
== NULL
)
7606 fprintf_vma ((FILE *) stream
, value
);
7609 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7611 #if BFD_HOST_64BIT_LONG
7612 fprintf ((FILE *) stream
, "%016lx", value
);
7614 fprintf ((FILE *) stream
, "%08lx%08lx",
7615 _bfd_int64_high (value
), _bfd_int64_low (value
));
7619 fprintf ((FILE *) stream
, "%08lx",
7620 (unsigned long) (value
& 0xffffffff));
7623 fprintf_vma ((FILE *) stream
, value
);
7627 enum elf_reloc_type_class
7628 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7630 return reloc_class_normal
;
7633 /* For RELA architectures, return the relocation value for a
7634 relocation against a local symbol. */
7637 _bfd_elf_rela_local_sym (bfd
*abfd
,
7638 Elf_Internal_Sym
*sym
,
7640 Elf_Internal_Rela
*rel
)
7642 asection
*sec
= *psec
;
7645 relocation
= (sec
->output_section
->vma
7646 + sec
->output_offset
7648 if ((sec
->flags
& SEC_MERGE
)
7649 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7650 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7653 _bfd_merged_section_offset (abfd
, psec
,
7654 elf_section_data (sec
)->sec_info
,
7655 sym
->st_value
+ rel
->r_addend
);
7658 /* If we have changed the section, and our original section is
7659 marked with SEC_EXCLUDE, it means that the original
7660 SEC_MERGE section has been completely subsumed in some
7661 other SEC_MERGE section. In this case, we need to leave
7662 some info around for --emit-relocs. */
7663 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7664 sec
->kept_section
= *psec
;
7667 rel
->r_addend
-= relocation
;
7668 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7674 _bfd_elf_rel_local_sym (bfd
*abfd
,
7675 Elf_Internal_Sym
*sym
,
7679 asection
*sec
= *psec
;
7681 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7682 return sym
->st_value
+ addend
;
7684 return _bfd_merged_section_offset (abfd
, psec
,
7685 elf_section_data (sec
)->sec_info
,
7686 sym
->st_value
+ addend
);
7690 _bfd_elf_section_offset (bfd
*abfd
,
7691 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7695 switch (sec
->sec_info_type
)
7697 case ELF_INFO_TYPE_STABS
:
7698 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7700 case ELF_INFO_TYPE_EH_FRAME
:
7701 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);
7707 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7708 reconstruct an ELF file by reading the segments out of remote memory
7709 based on the ELF file header at EHDR_VMA and the ELF program headers it
7710 points to. If not null, *LOADBASEP is filled in with the difference
7711 between the VMAs from which the segments were read, and the VMAs the
7712 file headers (and hence BFD's idea of each section's VMA) put them at.
7714 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7715 remote memory at target address VMA into the local buffer at MYADDR; it
7716 should return zero on success or an `errno' code on failure. TEMPL must
7717 be a BFD for an ELF target with the word size and byte order found in
7718 the remote memory. */
7721 bfd_elf_bfd_from_remote_memory
7725 int (*target_read_memory
) (bfd_vma
, char *, int))
7727 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7728 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7732 _bfd_elf_get_synthetic_symtab (bfd
*abfd
, asymbol
**dynsyms
, asymbol
**ret
)
7734 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7737 const char *relplt_name
;
7738 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7742 Elf_Internal_Shdr
*hdr
;
7747 if (!bed
->plt_sym_val
)
7750 relplt_name
= bed
->relplt_name
;
7751 if (relplt_name
== NULL
)
7752 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7753 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7757 hdr
= &elf_section_data (relplt
)->this_hdr
;
7758 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7759 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7762 plt
= bfd_get_section_by_name (abfd
, ".plt");
7766 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7767 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7770 count
= relplt
->size
/ hdr
->sh_entsize
;
7771 size
= count
* sizeof (asymbol
);
7772 p
= relplt
->relocation
;
7773 for (i
= 0; i
< count
; i
++, s
++, p
++)
7774 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7776 s
= *ret
= bfd_malloc (size
);
7780 names
= (char *) (s
+ count
);
7781 p
= relplt
->relocation
;
7783 for (i
= 0; i
< count
; i
++, s
++, p
++)
7788 addr
= bed
->plt_sym_val (i
, plt
, p
);
7789 if (addr
== (bfd_vma
) -1)
7792 *s
= **p
->sym_ptr_ptr
;
7794 s
->value
= addr
- plt
->vma
;
7796 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7797 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7799 memcpy (names
, "@plt", sizeof ("@plt"));
7800 names
+= sizeof ("@plt");
7807 /* Sort symbol by binding and section. We want to put definitions
7808 sorted by section at the beginning. */
7811 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7813 const Elf_Internal_Sym
*s1
;
7814 const Elf_Internal_Sym
*s2
;
7817 /* Make sure that undefined symbols are at the end. */
7818 s1
= (const Elf_Internal_Sym
*) arg1
;
7819 if (s1
->st_shndx
== SHN_UNDEF
)
7821 s2
= (const Elf_Internal_Sym
*) arg2
;
7822 if (s2
->st_shndx
== SHN_UNDEF
)
7825 /* Sorted by section index. */
7826 shndx
= s1
->st_shndx
- s2
->st_shndx
;
7830 /* Sorted by binding. */
7831 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
7836 Elf_Internal_Sym
*sym
;
7841 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7843 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7844 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7845 return strcmp (s1
->name
, s2
->name
);
7848 /* Check if 2 sections define the same set of local and global
7852 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
7855 const struct elf_backend_data
*bed1
, *bed2
;
7856 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7857 bfd_size_type symcount1
, symcount2
;
7858 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7859 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
7860 Elf_Internal_Sym
*isymend
;
7861 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
7862 bfd_size_type count1
, count2
, i
;
7869 /* If both are .gnu.linkonce sections, they have to have the same
7871 if (strncmp (sec1
->name
, ".gnu.linkonce",
7872 sizeof ".gnu.linkonce" - 1) == 0
7873 && strncmp (sec2
->name
, ".gnu.linkonce",
7874 sizeof ".gnu.linkonce" - 1) == 0)
7875 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
7876 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
7878 /* Both sections have to be in ELF. */
7879 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7880 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7883 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7886 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
7887 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
7889 /* If both are members of section groups, they have to have the
7891 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
7895 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7896 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7897 if (shndx1
== -1 || shndx2
== -1)
7900 bed1
= get_elf_backend_data (bfd1
);
7901 bed2
= get_elf_backend_data (bfd2
);
7902 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7903 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7904 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7905 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7907 if (symcount1
== 0 || symcount2
== 0)
7910 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7912 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7916 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
7919 /* Sort symbols by binding and section. Global definitions are at
7921 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
7922 elf_sort_elf_symbol
);
7923 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
7924 elf_sort_elf_symbol
);
7926 /* Count definitions in the section. */
7928 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
7929 isym
< isymend
; isym
++)
7931 if (isym
->st_shndx
== (unsigned int) shndx1
)
7938 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
7943 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
7944 isym
< isymend
; isym
++)
7946 if (isym
->st_shndx
== (unsigned int) shndx2
)
7953 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
7957 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7960 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
7961 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
7963 if (symtable1
== NULL
|| symtable2
== NULL
)
7967 for (isym
= isymstart1
, isymend
= isym
+ count1
;
7968 isym
< isymend
; isym
++)
7971 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
7978 for (isym
= isymstart2
, isymend
= isym
+ count1
;
7979 isym
< isymend
; isym
++)
7982 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
7988 /* Sort symbol by name. */
7989 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7990 elf_sym_name_compare
);
7991 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7992 elf_sym_name_compare
);
7994 for (i
= 0; i
< count1
; i
++)
7995 /* Two symbols must have the same binding, type and name. */
7996 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
7997 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
7998 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)