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 (_("%B: invalid string offset %u >= %lu for section `%s'"),
296 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 (_("%B: invalid SHT_GROUP entry"), abfd
));
541 dest
->shdr
= elf_elfsections (abfd
)[idx
];
548 if (num_group
!= (unsigned) -1)
552 for (i
= 0; i
< num_group
; i
++)
554 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
555 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
556 unsigned int n_elt
= shdr
->sh_size
/ 4;
558 /* Look through this group's sections to see if current
559 section is a member. */
561 if ((++idx
)->shdr
== hdr
)
565 /* We are a member of this group. Go looking through
566 other members to see if any others are linked via
568 idx
= (Elf_Internal_Group
*) shdr
->contents
;
569 n_elt
= shdr
->sh_size
/ 4;
571 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
572 && elf_next_in_group (s
) != NULL
)
576 /* Snarf the group name from other member, and
577 insert current section in circular list. */
578 elf_group_name (newsect
) = elf_group_name (s
);
579 elf_next_in_group (newsect
) = elf_next_in_group (s
);
580 elf_next_in_group (s
) = newsect
;
586 gname
= group_signature (abfd
, shdr
);
589 elf_group_name (newsect
) = gname
;
591 /* Start a circular list with one element. */
592 elf_next_in_group (newsect
) = newsect
;
595 /* If the group section has been created, point to the
597 if (shdr
->bfd_section
!= NULL
)
598 elf_next_in_group (shdr
->bfd_section
) = newsect
;
606 if (elf_group_name (newsect
) == NULL
)
608 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
615 _bfd_elf_setup_group_pointers (bfd
*abfd
)
618 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
619 bfd_boolean result
= TRUE
;
621 if (num_group
== (unsigned) -1)
624 for (i
= 0; i
< num_group
; i
++)
626 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
627 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
628 unsigned int n_elt
= shdr
->sh_size
/ 4;
631 if ((++idx
)->shdr
->bfd_section
)
632 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
633 else if (idx
->shdr
->sh_type
== SHT_RELA
634 || idx
->shdr
->sh_type
== SHT_REL
)
635 /* We won't include relocation sections in section groups in
636 output object files. We adjust the group section size here
637 so that relocatable link will work correctly when
638 relocation sections are in section group in input object
640 shdr
->bfd_section
->size
-= 4;
643 /* There are some unknown sections in the group. */
644 (*_bfd_error_handler
)
645 (_("%B: unknown [%d] section `%s' in group [%s]"),
647 (unsigned int) idx
->shdr
->sh_type
,
648 elf_string_from_elf_strtab (abfd
, idx
->shdr
->sh_name
),
649 shdr
->bfd_section
->name
);
657 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
659 return elf_next_in_group (sec
) != NULL
;
663 bfd_elf_discard_group (bfd
*abfd ATTRIBUTE_UNUSED
,
664 asection
*group ATTRIBUTE_UNUSED
)
667 asection
*first
= elf_next_in_group (group
);
672 s
->output_section
= bfd_abs_section_ptr
;
673 s
= elf_next_in_group (s
);
674 /* These lists are circular. */
679 /* FIXME: Never used. Remove it! */
685 /* Make a BFD section from an ELF section. We store a pointer to the
686 BFD section in the bfd_section field of the header. */
689 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
690 Elf_Internal_Shdr
*hdr
,
695 const struct elf_backend_data
*bed
;
697 if (hdr
->bfd_section
!= NULL
)
699 BFD_ASSERT (strcmp (name
,
700 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
704 newsect
= bfd_make_section_anyway (abfd
, name
);
708 hdr
->bfd_section
= newsect
;
709 elf_section_data (newsect
)->this_hdr
= *hdr
;
711 /* Always use the real type/flags. */
712 elf_section_type (newsect
) = hdr
->sh_type
;
713 elf_section_flags (newsect
) = hdr
->sh_flags
;
715 newsect
->filepos
= hdr
->sh_offset
;
717 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
718 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
719 || ! bfd_set_section_alignment (abfd
, newsect
,
720 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
723 flags
= SEC_NO_FLAGS
;
724 if (hdr
->sh_type
!= SHT_NOBITS
)
725 flags
|= SEC_HAS_CONTENTS
;
726 if (hdr
->sh_type
== SHT_GROUP
)
727 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
728 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
731 if (hdr
->sh_type
!= SHT_NOBITS
)
734 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
735 flags
|= SEC_READONLY
;
736 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
738 else if ((flags
& SEC_LOAD
) != 0)
740 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
743 newsect
->entsize
= hdr
->sh_entsize
;
744 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
745 flags
|= SEC_STRINGS
;
747 if (hdr
->sh_flags
& SHF_GROUP
)
748 if (!setup_group (abfd
, hdr
, newsect
))
750 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
751 flags
|= SEC_THREAD_LOCAL
;
753 /* The debugging sections appear to be recognized only by name, not
756 static const char *debug_sec_names
[] =
765 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
766 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
770 flags
|= SEC_DEBUGGING
;
773 /* As a GNU extension, if the name begins with .gnu.linkonce, we
774 only link a single copy of the section. This is used to support
775 g++. g++ will emit each template expansion in its own section.
776 The symbols will be defined as weak, so that multiple definitions
777 are permitted. The GNU linker extension is to actually discard
778 all but one of the sections. */
779 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
780 && elf_next_in_group (newsect
) == NULL
)
781 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
783 bed
= get_elf_backend_data (abfd
);
784 if (bed
->elf_backend_section_flags
)
785 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
788 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
791 if ((flags
& SEC_ALLOC
) != 0)
793 Elf_Internal_Phdr
*phdr
;
796 /* Look through the phdrs to see if we need to adjust the lma.
797 If all the p_paddr fields are zero, we ignore them, since
798 some ELF linkers produce such output. */
799 phdr
= elf_tdata (abfd
)->phdr
;
800 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
802 if (phdr
->p_paddr
!= 0)
805 if (i
< elf_elfheader (abfd
)->e_phnum
)
807 phdr
= elf_tdata (abfd
)->phdr
;
808 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
810 /* This section is part of this segment if its file
811 offset plus size lies within the segment's memory
812 span and, if the section is loaded, the extent of the
813 loaded data lies within the extent of the segment.
815 Note - we used to check the p_paddr field as well, and
816 refuse to set the LMA if it was 0. This is wrong
817 though, as a perfectly valid initialised segment can
818 have a p_paddr of zero. Some architectures, eg ARM,
819 place special significance on the address 0 and
820 executables need to be able to have a segment which
821 covers this address. */
822 if (phdr
->p_type
== PT_LOAD
823 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
824 && (hdr
->sh_offset
+ hdr
->sh_size
825 <= phdr
->p_offset
+ phdr
->p_memsz
)
826 && ((flags
& SEC_LOAD
) == 0
827 || (hdr
->sh_offset
+ hdr
->sh_size
828 <= phdr
->p_offset
+ phdr
->p_filesz
)))
830 if ((flags
& SEC_LOAD
) == 0)
831 newsect
->lma
= (phdr
->p_paddr
832 + hdr
->sh_addr
- phdr
->p_vaddr
);
834 /* We used to use the same adjustment for SEC_LOAD
835 sections, but that doesn't work if the segment
836 is packed with code from multiple VMAs.
837 Instead we calculate the section LMA based on
838 the segment LMA. It is assumed that the
839 segment will contain sections with contiguous
840 LMAs, even if the VMAs are not. */
841 newsect
->lma
= (phdr
->p_paddr
842 + hdr
->sh_offset
- phdr
->p_offset
);
844 /* With contiguous segments, we can't tell from file
845 offsets whether a section with zero size should
846 be placed at the end of one segment or the
847 beginning of the next. Decide based on vaddr. */
848 if (hdr
->sh_addr
>= phdr
->p_vaddr
849 && (hdr
->sh_addr
+ hdr
->sh_size
850 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
865 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
868 Helper functions for GDB to locate the string tables.
869 Since BFD hides string tables from callers, GDB needs to use an
870 internal hook to find them. Sun's .stabstr, in particular,
871 isn't even pointed to by the .stab section, so ordinary
872 mechanisms wouldn't work to find it, even if we had some.
875 struct elf_internal_shdr
*
876 bfd_elf_find_section (bfd
*abfd
, char *name
)
878 Elf_Internal_Shdr
**i_shdrp
;
883 i_shdrp
= elf_elfsections (abfd
);
886 shstrtab
= bfd_elf_get_str_section (abfd
,
887 elf_elfheader (abfd
)->e_shstrndx
);
888 if (shstrtab
!= NULL
)
890 max
= elf_numsections (abfd
);
891 for (i
= 1; i
< max
; i
++)
892 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
899 const char *const bfd_elf_section_type_names
[] = {
900 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
901 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
902 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
905 /* ELF relocs are against symbols. If we are producing relocatable
906 output, and the reloc is against an external symbol, and nothing
907 has given us any additional addend, the resulting reloc will also
908 be against the same symbol. In such a case, we don't want to
909 change anything about the way the reloc is handled, since it will
910 all be done at final link time. Rather than put special case code
911 into bfd_perform_relocation, all the reloc types use this howto
912 function. It just short circuits the reloc if producing
913 relocatable output against an external symbol. */
915 bfd_reloc_status_type
916 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
917 arelent
*reloc_entry
,
919 void *data ATTRIBUTE_UNUSED
,
920 asection
*input_section
,
922 char **error_message ATTRIBUTE_UNUSED
)
924 if (output_bfd
!= NULL
925 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
926 && (! reloc_entry
->howto
->partial_inplace
927 || reloc_entry
->addend
== 0))
929 reloc_entry
->address
+= input_section
->output_offset
;
933 return bfd_reloc_continue
;
936 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
939 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
942 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
943 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
946 /* Finish SHF_MERGE section merging. */
949 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
954 if (!is_elf_hash_table (info
->hash
))
957 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
958 if ((ibfd
->flags
& DYNAMIC
) == 0)
959 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
960 if ((sec
->flags
& SEC_MERGE
) != 0
961 && !bfd_is_abs_section (sec
->output_section
))
963 struct bfd_elf_section_data
*secdata
;
965 secdata
= elf_section_data (sec
);
966 if (! _bfd_add_merge_section (abfd
,
967 &elf_hash_table (info
)->merge_info
,
968 sec
, &secdata
->sec_info
))
970 else if (secdata
->sec_info
)
971 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
974 if (elf_hash_table (info
)->merge_info
!= NULL
)
975 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
976 merge_sections_remove_hook
);
981 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
983 sec
->output_section
= bfd_abs_section_ptr
;
984 sec
->output_offset
= sec
->vma
;
985 if (!is_elf_hash_table (info
->hash
))
988 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
991 /* Copy the program header and other data from one object module to
995 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
997 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
998 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1001 BFD_ASSERT (!elf_flags_init (obfd
)
1002 || (elf_elfheader (obfd
)->e_flags
1003 == elf_elfheader (ibfd
)->e_flags
));
1005 elf_gp (obfd
) = elf_gp (ibfd
);
1006 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1007 elf_flags_init (obfd
) = TRUE
;
1011 /* Print out the program headers. */
1014 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1017 Elf_Internal_Phdr
*p
;
1019 bfd_byte
*dynbuf
= NULL
;
1021 p
= elf_tdata (abfd
)->phdr
;
1026 fprintf (f
, _("\nProgram Header:\n"));
1027 c
= elf_elfheader (abfd
)->e_phnum
;
1028 for (i
= 0; i
< c
; i
++, p
++)
1035 case PT_NULL
: pt
= "NULL"; break;
1036 case PT_LOAD
: pt
= "LOAD"; break;
1037 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1038 case PT_INTERP
: pt
= "INTERP"; break;
1039 case PT_NOTE
: pt
= "NOTE"; break;
1040 case PT_SHLIB
: pt
= "SHLIB"; break;
1041 case PT_PHDR
: pt
= "PHDR"; break;
1042 case PT_TLS
: pt
= "TLS"; break;
1043 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1044 case PT_GNU_STACK
: pt
= "STACK"; break;
1045 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1046 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1048 fprintf (f
, "%8s off 0x", pt
);
1049 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1050 fprintf (f
, " vaddr 0x");
1051 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1052 fprintf (f
, " paddr 0x");
1053 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1054 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1055 fprintf (f
, " filesz 0x");
1056 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1057 fprintf (f
, " memsz 0x");
1058 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1059 fprintf (f
, " flags %c%c%c",
1060 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1061 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1062 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1063 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1064 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1069 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1073 unsigned long shlink
;
1074 bfd_byte
*extdyn
, *extdynend
;
1076 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1078 fprintf (f
, _("\nDynamic Section:\n"));
1080 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1083 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1086 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1088 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1089 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1092 extdynend
= extdyn
+ s
->size
;
1093 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1095 Elf_Internal_Dyn dyn
;
1098 bfd_boolean stringp
;
1100 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1102 if (dyn
.d_tag
== DT_NULL
)
1109 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1113 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1114 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1115 case DT_PLTGOT
: name
= "PLTGOT"; break;
1116 case DT_HASH
: name
= "HASH"; break;
1117 case DT_STRTAB
: name
= "STRTAB"; break;
1118 case DT_SYMTAB
: name
= "SYMTAB"; break;
1119 case DT_RELA
: name
= "RELA"; break;
1120 case DT_RELASZ
: name
= "RELASZ"; break;
1121 case DT_RELAENT
: name
= "RELAENT"; break;
1122 case DT_STRSZ
: name
= "STRSZ"; break;
1123 case DT_SYMENT
: name
= "SYMENT"; break;
1124 case DT_INIT
: name
= "INIT"; break;
1125 case DT_FINI
: name
= "FINI"; break;
1126 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1127 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1128 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1129 case DT_REL
: name
= "REL"; break;
1130 case DT_RELSZ
: name
= "RELSZ"; break;
1131 case DT_RELENT
: name
= "RELENT"; break;
1132 case DT_PLTREL
: name
= "PLTREL"; break;
1133 case DT_DEBUG
: name
= "DEBUG"; break;
1134 case DT_TEXTREL
: name
= "TEXTREL"; break;
1135 case DT_JMPREL
: name
= "JMPREL"; break;
1136 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1137 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1138 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1139 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1140 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1141 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1142 case DT_FLAGS
: name
= "FLAGS"; break;
1143 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1144 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1145 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1146 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1147 case DT_MOVEENT
: name
= "MOVEENT"; break;
1148 case DT_MOVESZ
: name
= "MOVESZ"; break;
1149 case DT_FEATURE
: name
= "FEATURE"; break;
1150 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1151 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1152 case DT_SYMINENT
: name
= "SYMINENT"; break;
1153 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1154 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1155 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1156 case DT_PLTPAD
: name
= "PLTPAD"; break;
1157 case DT_MOVETAB
: name
= "MOVETAB"; break;
1158 case DT_SYMINFO
: name
= "SYMINFO"; break;
1159 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1160 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1161 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1162 case DT_VERSYM
: name
= "VERSYM"; break;
1163 case DT_VERDEF
: name
= "VERDEF"; break;
1164 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1165 case DT_VERNEED
: name
= "VERNEED"; break;
1166 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1167 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1168 case DT_USED
: name
= "USED"; break;
1169 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1172 fprintf (f
, " %-11s ", name
);
1174 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1178 unsigned int tagv
= dyn
.d_un
.d_val
;
1180 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1183 fprintf (f
, "%s", string
);
1192 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1193 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1195 if (! _bfd_elf_slurp_version_tables (abfd
))
1199 if (elf_dynverdef (abfd
) != 0)
1201 Elf_Internal_Verdef
*t
;
1203 fprintf (f
, _("\nVersion definitions:\n"));
1204 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1206 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1207 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1208 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1210 Elf_Internal_Verdaux
*a
;
1213 for (a
= t
->vd_auxptr
->vda_nextptr
;
1216 fprintf (f
, "%s ", a
->vda_nodename
);
1222 if (elf_dynverref (abfd
) != 0)
1224 Elf_Internal_Verneed
*t
;
1226 fprintf (f
, _("\nVersion References:\n"));
1227 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1229 Elf_Internal_Vernaux
*a
;
1231 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1232 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1233 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1234 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1246 /* Display ELF-specific fields of a symbol. */
1249 bfd_elf_print_symbol (bfd
*abfd
,
1252 bfd_print_symbol_type how
)
1257 case bfd_print_symbol_name
:
1258 fprintf (file
, "%s", symbol
->name
);
1260 case bfd_print_symbol_more
:
1261 fprintf (file
, "elf ");
1262 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1263 fprintf (file
, " %lx", (long) symbol
->flags
);
1265 case bfd_print_symbol_all
:
1267 const char *section_name
;
1268 const char *name
= NULL
;
1269 const struct elf_backend_data
*bed
;
1270 unsigned char st_other
;
1273 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1275 bed
= get_elf_backend_data (abfd
);
1276 if (bed
->elf_backend_print_symbol_all
)
1277 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1281 name
= symbol
->name
;
1282 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1285 fprintf (file
, " %s\t", section_name
);
1286 /* Print the "other" value for a symbol. For common symbols,
1287 we've already printed the size; now print the alignment.
1288 For other symbols, we have no specified alignment, and
1289 we've printed the address; now print the size. */
1290 if (bfd_is_com_section (symbol
->section
))
1291 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1293 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1294 bfd_fprintf_vma (abfd
, file
, val
);
1296 /* If we have version information, print it. */
1297 if (elf_tdata (abfd
)->dynversym_section
!= 0
1298 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1299 || elf_tdata (abfd
)->dynverref_section
!= 0))
1301 unsigned int vernum
;
1302 const char *version_string
;
1304 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1307 version_string
= "";
1308 else if (vernum
== 1)
1309 version_string
= "Base";
1310 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1312 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1315 Elf_Internal_Verneed
*t
;
1317 version_string
= "";
1318 for (t
= elf_tdata (abfd
)->verref
;
1322 Elf_Internal_Vernaux
*a
;
1324 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1326 if (a
->vna_other
== vernum
)
1328 version_string
= a
->vna_nodename
;
1335 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1336 fprintf (file
, " %-11s", version_string
);
1341 fprintf (file
, " (%s)", version_string
);
1342 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1347 /* If the st_other field is not zero, print it. */
1348 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1353 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1354 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1355 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1357 /* Some other non-defined flags are also present, so print
1359 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1362 fprintf (file
, " %s", name
);
1368 /* Create an entry in an ELF linker hash table. */
1370 struct bfd_hash_entry
*
1371 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1372 struct bfd_hash_table
*table
,
1375 /* Allocate the structure if it has not already been allocated by a
1379 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1384 /* Call the allocation method of the superclass. */
1385 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1388 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1389 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1391 /* Set local fields. */
1394 ret
->dynstr_index
= 0;
1395 ret
->elf_hash_value
= 0;
1396 ret
->weakdef
= NULL
;
1397 ret
->verinfo
.verdef
= NULL
;
1398 ret
->vtable_entries_size
= 0;
1399 ret
->vtable_entries_used
= NULL
;
1400 ret
->vtable_parent
= NULL
;
1401 ret
->got
= htab
->init_refcount
;
1402 ret
->plt
= htab
->init_refcount
;
1404 ret
->type
= STT_NOTYPE
;
1406 /* Assume that we have been called by a non-ELF symbol reader.
1407 This flag is then reset by the code which reads an ELF input
1408 file. This ensures that a symbol created by a non-ELF symbol
1409 reader will have the flag set correctly. */
1410 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1416 /* Copy data from an indirect symbol to its direct symbol, hiding the
1417 old indirect symbol. Also used for copying flags to a weakdef. */
1420 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1421 struct elf_link_hash_entry
*dir
,
1422 struct elf_link_hash_entry
*ind
)
1425 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1427 /* Copy down any references that we may have already seen to the
1428 symbol which just became indirect. */
1430 dir
->elf_link_hash_flags
1431 |= ind
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_DYNAMIC
1432 | ELF_LINK_HASH_REF_REGULAR
1433 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1434 | ELF_LINK_NON_GOT_REF
1435 | ELF_LINK_HASH_NEEDS_PLT
1436 | ELF_LINK_POINTER_EQUALITY_NEEDED
);
1438 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1441 /* Copy over the global and procedure linkage table refcount entries.
1442 These may have been already set up by a check_relocs routine. */
1443 tmp
= dir
->got
.refcount
;
1444 if (tmp
< lowest_valid
)
1446 dir
->got
.refcount
= ind
->got
.refcount
;
1447 ind
->got
.refcount
= tmp
;
1450 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1452 tmp
= dir
->plt
.refcount
;
1453 if (tmp
< lowest_valid
)
1455 dir
->plt
.refcount
= ind
->plt
.refcount
;
1456 ind
->plt
.refcount
= tmp
;
1459 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1461 if (dir
->dynindx
== -1)
1463 dir
->dynindx
= ind
->dynindx
;
1464 dir
->dynstr_index
= ind
->dynstr_index
;
1466 ind
->dynstr_index
= 0;
1469 BFD_ASSERT (ind
->dynindx
== -1);
1473 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1474 struct elf_link_hash_entry
*h
,
1475 bfd_boolean force_local
)
1477 h
->plt
= elf_hash_table (info
)->init_offset
;
1478 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1481 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1482 if (h
->dynindx
!= -1)
1485 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1491 /* Initialize an ELF linker hash table. */
1494 _bfd_elf_link_hash_table_init
1495 (struct elf_link_hash_table
*table
,
1497 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1498 struct bfd_hash_table
*,
1503 table
->dynamic_sections_created
= FALSE
;
1504 table
->dynobj
= NULL
;
1505 /* Make sure can_refcount is extended to the width and signedness of
1506 init_refcount before we subtract one from it. */
1507 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1508 table
->init_refcount
.refcount
-= 1;
1509 table
->init_offset
.offset
= -(bfd_vma
) 1;
1510 /* The first dynamic symbol is a dummy. */
1511 table
->dynsymcount
= 1;
1512 table
->dynstr
= NULL
;
1513 table
->bucketcount
= 0;
1514 table
->needed
= NULL
;
1516 table
->merge_info
= NULL
;
1517 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1518 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1519 table
->dynlocal
= NULL
;
1520 table
->runpath
= NULL
;
1521 table
->tls_sec
= NULL
;
1522 table
->tls_size
= 0;
1523 table
->loaded
= NULL
;
1525 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1526 table
->root
.type
= bfd_link_elf_hash_table
;
1531 /* Create an ELF linker hash table. */
1533 struct bfd_link_hash_table
*
1534 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1536 struct elf_link_hash_table
*ret
;
1537 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1539 ret
= bfd_malloc (amt
);
1543 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1552 /* This is a hook for the ELF emulation code in the generic linker to
1553 tell the backend linker what file name to use for the DT_NEEDED
1554 entry for a dynamic object. */
1557 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1559 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1560 && bfd_get_format (abfd
) == bfd_object
)
1561 elf_dt_name (abfd
) = name
;
1565 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1568 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1569 && bfd_get_format (abfd
) == bfd_object
)
1570 lib_class
= elf_dyn_lib_class (abfd
);
1577 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1579 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1580 && bfd_get_format (abfd
) == bfd_object
)
1581 elf_dyn_lib_class (abfd
) = lib_class
;
1584 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1585 the linker ELF emulation code. */
1587 struct bfd_link_needed_list
*
1588 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1589 struct bfd_link_info
*info
)
1591 if (! is_elf_hash_table (info
->hash
))
1593 return elf_hash_table (info
)->needed
;
1596 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1597 hook for the linker ELF emulation code. */
1599 struct bfd_link_needed_list
*
1600 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1601 struct bfd_link_info
*info
)
1603 if (! is_elf_hash_table (info
->hash
))
1605 return elf_hash_table (info
)->runpath
;
1608 /* Get the name actually used for a dynamic object for a link. This
1609 is the SONAME entry if there is one. Otherwise, it is the string
1610 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1613 bfd_elf_get_dt_soname (bfd
*abfd
)
1615 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1616 && bfd_get_format (abfd
) == bfd_object
)
1617 return elf_dt_name (abfd
);
1621 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1622 the ELF linker emulation code. */
1625 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1626 struct bfd_link_needed_list
**pneeded
)
1629 bfd_byte
*dynbuf
= NULL
;
1631 unsigned long shlink
;
1632 bfd_byte
*extdyn
, *extdynend
;
1634 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1638 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1639 || bfd_get_format (abfd
) != bfd_object
)
1642 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1643 if (s
== NULL
|| s
->size
== 0)
1646 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1649 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1653 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1655 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1656 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1659 extdynend
= extdyn
+ s
->size
;
1660 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1662 Elf_Internal_Dyn dyn
;
1664 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1666 if (dyn
.d_tag
== DT_NULL
)
1669 if (dyn
.d_tag
== DT_NEEDED
)
1672 struct bfd_link_needed_list
*l
;
1673 unsigned int tagv
= dyn
.d_un
.d_val
;
1676 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1681 l
= bfd_alloc (abfd
, amt
);
1702 /* Allocate an ELF string table--force the first byte to be zero. */
1704 struct bfd_strtab_hash
*
1705 _bfd_elf_stringtab_init (void)
1707 struct bfd_strtab_hash
*ret
;
1709 ret
= _bfd_stringtab_init ();
1714 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1715 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1716 if (loc
== (bfd_size_type
) -1)
1718 _bfd_stringtab_free (ret
);
1725 /* ELF .o/exec file reading */
1727 /* Create a new bfd section from an ELF section header. */
1730 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1732 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1733 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1734 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1737 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1739 switch (hdr
->sh_type
)
1742 /* Inactive section. Throw it away. */
1745 case SHT_PROGBITS
: /* Normal section with contents. */
1746 case SHT_NOBITS
: /* .bss section. */
1747 case SHT_HASH
: /* .hash section. */
1748 case SHT_NOTE
: /* .note section. */
1749 case SHT_INIT_ARRAY
: /* .init_array section. */
1750 case SHT_FINI_ARRAY
: /* .fini_array section. */
1751 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1752 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1754 case SHT_DYNAMIC
: /* Dynamic linking information. */
1755 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1757 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1759 Elf_Internal_Shdr
*dynsymhdr
;
1761 /* The shared libraries distributed with hpux11 have a bogus
1762 sh_link field for the ".dynamic" section. Find the
1763 string table for the ".dynsym" section instead. */
1764 if (elf_dynsymtab (abfd
) != 0)
1766 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1767 hdr
->sh_link
= dynsymhdr
->sh_link
;
1771 unsigned int i
, num_sec
;
1773 num_sec
= elf_numsections (abfd
);
1774 for (i
= 1; i
< num_sec
; i
++)
1776 dynsymhdr
= elf_elfsections (abfd
)[i
];
1777 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1779 hdr
->sh_link
= dynsymhdr
->sh_link
;
1787 case SHT_SYMTAB
: /* A symbol table */
1788 if (elf_onesymtab (abfd
) == shindex
)
1791 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1792 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1793 elf_onesymtab (abfd
) = shindex
;
1794 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1795 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1796 abfd
->flags
|= HAS_SYMS
;
1798 /* Sometimes a shared object will map in the symbol table. If
1799 SHF_ALLOC is set, and this is a shared object, then we also
1800 treat this section as a BFD section. We can not base the
1801 decision purely on SHF_ALLOC, because that flag is sometimes
1802 set in a relocatable object file, which would confuse the
1804 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1805 && (abfd
->flags
& DYNAMIC
) != 0
1806 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1811 case SHT_DYNSYM
: /* A dynamic symbol table */
1812 if (elf_dynsymtab (abfd
) == shindex
)
1815 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1816 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1817 elf_dynsymtab (abfd
) = shindex
;
1818 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1819 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1820 abfd
->flags
|= HAS_SYMS
;
1822 /* Besides being a symbol table, we also treat this as a regular
1823 section, so that objcopy can handle it. */
1824 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1826 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1827 if (elf_symtab_shndx (abfd
) == shindex
)
1830 /* Get the associated symbol table. */
1831 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1832 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1835 elf_symtab_shndx (abfd
) = shindex
;
1836 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1837 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1840 case SHT_STRTAB
: /* A string table */
1841 if (hdr
->bfd_section
!= NULL
)
1843 if (ehdr
->e_shstrndx
== shindex
)
1845 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1846 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1850 unsigned int i
, num_sec
;
1852 num_sec
= elf_numsections (abfd
);
1853 for (i
= 1; i
< num_sec
; i
++)
1855 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1856 if (hdr2
->sh_link
== shindex
)
1858 if (! bfd_section_from_shdr (abfd
, i
))
1860 if (elf_onesymtab (abfd
) == i
)
1862 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1863 elf_elfsections (abfd
)[shindex
] =
1864 &elf_tdata (abfd
)->strtab_hdr
;
1867 if (elf_dynsymtab (abfd
) == i
)
1869 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1870 elf_elfsections (abfd
)[shindex
] = hdr
=
1871 &elf_tdata (abfd
)->dynstrtab_hdr
;
1872 /* We also treat this as a regular section, so
1873 that objcopy can handle it. */
1876 #if 0 /* Not handling other string tables specially right now. */
1877 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1878 /* We have a strtab for some random other section. */
1879 newsect
= (asection
*) hdr2
->bfd_section
;
1882 hdr
->bfd_section
= newsect
;
1883 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1885 elf_elfsections (abfd
)[shindex
] = hdr2
;
1891 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1895 /* *These* do a lot of work -- but build no sections! */
1897 asection
*target_sect
;
1898 Elf_Internal_Shdr
*hdr2
;
1899 unsigned int num_sec
= elf_numsections (abfd
);
1901 /* Check for a bogus link to avoid crashing. */
1902 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1903 || hdr
->sh_link
>= num_sec
)
1905 ((*_bfd_error_handler
)
1906 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1907 abfd
, hdr
->sh_link
, name
, shindex
));
1908 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1911 /* For some incomprehensible reason Oracle distributes
1912 libraries for Solaris in which some of the objects have
1913 bogus sh_link fields. It would be nice if we could just
1914 reject them, but, unfortunately, some people need to use
1915 them. We scan through the section headers; if we find only
1916 one suitable symbol table, we clobber the sh_link to point
1917 to it. I hope this doesn't break anything. */
1918 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1919 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1925 for (scan
= 1; scan
< num_sec
; scan
++)
1927 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1928 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1939 hdr
->sh_link
= found
;
1942 /* Get the symbol table. */
1943 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1944 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1947 /* If this reloc section does not use the main symbol table we
1948 don't treat it as a reloc section. BFD can't adequately
1949 represent such a section, so at least for now, we don't
1950 try. We just present it as a normal section. We also
1951 can't use it as a reloc section if it points to the null
1953 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1954 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1956 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1958 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1959 if (target_sect
== NULL
)
1962 if ((target_sect
->flags
& SEC_RELOC
) == 0
1963 || target_sect
->reloc_count
== 0)
1964 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1968 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1969 amt
= sizeof (*hdr2
);
1970 hdr2
= bfd_alloc (abfd
, amt
);
1971 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1974 elf_elfsections (abfd
)[shindex
] = hdr2
;
1975 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1976 target_sect
->flags
|= SEC_RELOC
;
1977 target_sect
->relocation
= NULL
;
1978 target_sect
->rel_filepos
= hdr
->sh_offset
;
1979 /* In the section to which the relocations apply, mark whether
1980 its relocations are of the REL or RELA variety. */
1981 if (hdr
->sh_size
!= 0)
1982 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1983 abfd
->flags
|= HAS_RELOC
;
1988 case SHT_GNU_verdef
:
1989 elf_dynverdef (abfd
) = shindex
;
1990 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1991 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1994 case SHT_GNU_versym
:
1995 elf_dynversym (abfd
) = shindex
;
1996 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1997 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2000 case SHT_GNU_verneed
:
2001 elf_dynverref (abfd
) = shindex
;
2002 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2003 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2010 /* We need a BFD section for objcopy and relocatable linking,
2011 and it's handy to have the signature available as the section
2013 name
= group_signature (abfd
, hdr
);
2016 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
2018 if (hdr
->contents
!= NULL
)
2020 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2021 unsigned int n_elt
= hdr
->sh_size
/ 4;
2024 if (idx
->flags
& GRP_COMDAT
)
2025 hdr
->bfd_section
->flags
2026 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2028 /* We try to keep the same section order as it comes in. */
2030 while (--n_elt
!= 0)
2031 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2032 && elf_next_in_group (s
) != NULL
)
2034 elf_next_in_group (hdr
->bfd_section
) = s
;
2041 /* Check for any processor-specific section types. */
2043 if (bed
->elf_backend_section_from_shdr
)
2044 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
2052 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2053 Return SEC for sections that have no elf section, and NULL on error. */
2056 bfd_section_from_r_symndx (bfd
*abfd
,
2057 struct sym_sec_cache
*cache
,
2059 unsigned long r_symndx
)
2061 Elf_Internal_Shdr
*symtab_hdr
;
2062 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2063 Elf_External_Sym_Shndx eshndx
;
2064 Elf_Internal_Sym isym
;
2065 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2067 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2068 return cache
->sec
[ent
];
2070 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2071 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2072 &isym
, esym
, &eshndx
) == NULL
)
2075 if (cache
->abfd
!= abfd
)
2077 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2080 cache
->indx
[ent
] = r_symndx
;
2081 cache
->sec
[ent
] = sec
;
2082 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2083 || isym
.st_shndx
> SHN_HIRESERVE
)
2086 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2088 cache
->sec
[ent
] = s
;
2090 return cache
->sec
[ent
];
2093 /* Given an ELF section number, retrieve the corresponding BFD
2097 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2099 if (index
>= elf_numsections (abfd
))
2101 return elf_elfsections (abfd
)[index
]->bfd_section
;
2104 static struct bfd_elf_special_section
const special_sections
[] =
2106 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2107 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2108 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2109 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2110 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2111 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2112 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2113 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2114 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2115 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2116 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2117 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2118 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2119 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2120 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2121 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2122 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2123 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2124 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2125 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2126 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2127 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2128 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2129 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2130 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2131 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2132 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2133 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2134 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2135 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2136 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2137 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2138 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2139 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2140 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2141 { ".note", 5, -1, SHT_NOTE
, 0 },
2142 { ".rela", 5, -1, SHT_RELA
, 0 },
2143 { ".rel", 4, -1, SHT_REL
, 0 },
2144 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2145 { NULL
, 0, 0, 0, 0 }
2148 static const struct bfd_elf_special_section
*
2149 get_special_section (const char *name
,
2150 const struct bfd_elf_special_section
*special_sections
,
2154 int len
= strlen (name
);
2156 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2159 int prefix_len
= special_sections
[i
].prefix_length
;
2161 if (len
< prefix_len
)
2163 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2166 suffix_len
= special_sections
[i
].suffix_length
;
2167 if (suffix_len
<= 0)
2169 if (name
[prefix_len
] != 0)
2171 if (suffix_len
== 0)
2173 if (name
[prefix_len
] != '.'
2174 && (suffix_len
== -2
2175 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2181 if (len
< prefix_len
+ suffix_len
)
2183 if (memcmp (name
+ len
- suffix_len
,
2184 special_sections
[i
].prefix
+ prefix_len
,
2188 return &special_sections
[i
];
2194 const struct bfd_elf_special_section
*
2195 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2197 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2198 const struct bfd_elf_special_section
*ssect
= NULL
;
2200 /* See if this is one of the special sections. */
2203 unsigned int rela
= bed
->default_use_rela_p
;
2205 if (bed
->special_sections
)
2206 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2209 ssect
= get_special_section (name
, special_sections
, rela
);
2216 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2218 struct bfd_elf_section_data
*sdata
;
2219 const struct bfd_elf_special_section
*ssect
;
2221 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2224 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2227 sec
->used_by_bfd
= sdata
;
2230 elf_section_type (sec
) = SHT_NULL
;
2231 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2234 elf_section_type (sec
) = ssect
->type
;
2235 elf_section_flags (sec
) = ssect
->attr
;
2238 /* Indicate whether or not this section should use RELA relocations. */
2239 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2244 /* Create a new bfd section from an ELF program header.
2246 Since program segments have no names, we generate a synthetic name
2247 of the form segment<NUM>, where NUM is generally the index in the
2248 program header table. For segments that are split (see below) we
2249 generate the names segment<NUM>a and segment<NUM>b.
2251 Note that some program segments may have a file size that is different than
2252 (less than) the memory size. All this means is that at execution the
2253 system must allocate the amount of memory specified by the memory size,
2254 but only initialize it with the first "file size" bytes read from the
2255 file. This would occur for example, with program segments consisting
2256 of combined data+bss.
2258 To handle the above situation, this routine generates TWO bfd sections
2259 for the single program segment. The first has the length specified by
2260 the file size of the segment, and the second has the length specified
2261 by the difference between the two sizes. In effect, the segment is split
2262 into it's initialized and uninitialized parts.
2267 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2268 Elf_Internal_Phdr
*hdr
,
2270 const char *typename
)
2278 split
= ((hdr
->p_memsz
> 0)
2279 && (hdr
->p_filesz
> 0)
2280 && (hdr
->p_memsz
> hdr
->p_filesz
));
2281 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2282 len
= strlen (namebuf
) + 1;
2283 name
= bfd_alloc (abfd
, len
);
2286 memcpy (name
, namebuf
, len
);
2287 newsect
= bfd_make_section (abfd
, name
);
2288 if (newsect
== NULL
)
2290 newsect
->vma
= hdr
->p_vaddr
;
2291 newsect
->lma
= hdr
->p_paddr
;
2292 newsect
->size
= hdr
->p_filesz
;
2293 newsect
->filepos
= hdr
->p_offset
;
2294 newsect
->flags
|= SEC_HAS_CONTENTS
;
2295 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2296 if (hdr
->p_type
== PT_LOAD
)
2298 newsect
->flags
|= SEC_ALLOC
;
2299 newsect
->flags
|= SEC_LOAD
;
2300 if (hdr
->p_flags
& PF_X
)
2302 /* FIXME: all we known is that it has execute PERMISSION,
2304 newsect
->flags
|= SEC_CODE
;
2307 if (!(hdr
->p_flags
& PF_W
))
2309 newsect
->flags
|= SEC_READONLY
;
2314 sprintf (namebuf
, "%s%db", typename
, index
);
2315 len
= strlen (namebuf
) + 1;
2316 name
= bfd_alloc (abfd
, len
);
2319 memcpy (name
, namebuf
, len
);
2320 newsect
= bfd_make_section (abfd
, name
);
2321 if (newsect
== NULL
)
2323 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2324 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2325 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2326 if (hdr
->p_type
== PT_LOAD
)
2328 newsect
->flags
|= SEC_ALLOC
;
2329 if (hdr
->p_flags
& PF_X
)
2330 newsect
->flags
|= SEC_CODE
;
2332 if (!(hdr
->p_flags
& PF_W
))
2333 newsect
->flags
|= SEC_READONLY
;
2340 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2342 const struct elf_backend_data
*bed
;
2344 switch (hdr
->p_type
)
2347 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2350 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2353 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2356 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2359 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2361 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2366 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2369 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2371 case PT_GNU_EH_FRAME
:
2372 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2376 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2379 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2382 /* Check for any processor-specific program segment types.
2383 If no handler for them, default to making "segment" sections. */
2384 bed
= get_elf_backend_data (abfd
);
2385 if (bed
->elf_backend_section_from_phdr
)
2386 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2388 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2392 /* Initialize REL_HDR, the section-header for new section, containing
2393 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2394 relocations; otherwise, we use REL relocations. */
2397 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2398 Elf_Internal_Shdr
*rel_hdr
,
2400 bfd_boolean use_rela_p
)
2403 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2404 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2406 name
= bfd_alloc (abfd
, amt
);
2409 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2411 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2413 if (rel_hdr
->sh_name
== (unsigned int) -1)
2415 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2416 rel_hdr
->sh_entsize
= (use_rela_p
2417 ? bed
->s
->sizeof_rela
2418 : bed
->s
->sizeof_rel
);
2419 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2420 rel_hdr
->sh_flags
= 0;
2421 rel_hdr
->sh_addr
= 0;
2422 rel_hdr
->sh_size
= 0;
2423 rel_hdr
->sh_offset
= 0;
2428 /* Set up an ELF internal section header for a section. */
2431 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2433 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2434 bfd_boolean
*failedptr
= failedptrarg
;
2435 Elf_Internal_Shdr
*this_hdr
;
2439 /* We already failed; just get out of the bfd_map_over_sections
2444 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2446 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2447 asect
->name
, FALSE
);
2448 if (this_hdr
->sh_name
== (unsigned int) -1)
2454 this_hdr
->sh_flags
= 0;
2456 if ((asect
->flags
& SEC_ALLOC
) != 0
2457 || asect
->user_set_vma
)
2458 this_hdr
->sh_addr
= asect
->vma
;
2460 this_hdr
->sh_addr
= 0;
2462 this_hdr
->sh_offset
= 0;
2463 this_hdr
->sh_size
= asect
->size
;
2464 this_hdr
->sh_link
= 0;
2465 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2466 /* The sh_entsize and sh_info fields may have been set already by
2467 copy_private_section_data. */
2469 this_hdr
->bfd_section
= asect
;
2470 this_hdr
->contents
= NULL
;
2472 /* If the section type is unspecified, we set it based on
2474 if (this_hdr
->sh_type
== SHT_NULL
)
2476 if ((asect
->flags
& SEC_GROUP
) != 0)
2478 /* We also need to mark SHF_GROUP here for relocatable
2480 struct bfd_link_order
*l
;
2483 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2484 if (l
->type
== bfd_indirect_link_order
2485 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2488 /* The name is not important. Anything will do. */
2489 elf_group_name (elt
->output_section
) = "G";
2490 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2492 elt
= elf_next_in_group (elt
);
2493 /* During a relocatable link, the lists are
2496 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2498 this_hdr
->sh_type
= SHT_GROUP
;
2500 else if ((asect
->flags
& SEC_ALLOC
) != 0
2501 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2502 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2503 this_hdr
->sh_type
= SHT_NOBITS
;
2505 this_hdr
->sh_type
= SHT_PROGBITS
;
2508 switch (this_hdr
->sh_type
)
2514 case SHT_INIT_ARRAY
:
2515 case SHT_FINI_ARRAY
:
2516 case SHT_PREINIT_ARRAY
:
2523 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2527 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2531 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2535 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2536 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2540 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2541 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2544 case SHT_GNU_versym
:
2545 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2548 case SHT_GNU_verdef
:
2549 this_hdr
->sh_entsize
= 0;
2550 /* objcopy or strip will copy over sh_info, but may not set
2551 cverdefs. The linker will set cverdefs, but sh_info will be
2553 if (this_hdr
->sh_info
== 0)
2554 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2556 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2557 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2560 case SHT_GNU_verneed
:
2561 this_hdr
->sh_entsize
= 0;
2562 /* objcopy or strip will copy over sh_info, but may not set
2563 cverrefs. The linker will set cverrefs, but sh_info will be
2565 if (this_hdr
->sh_info
== 0)
2566 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2568 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2569 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2573 this_hdr
->sh_entsize
= 4;
2577 if ((asect
->flags
& SEC_ALLOC
) != 0)
2578 this_hdr
->sh_flags
|= SHF_ALLOC
;
2579 if ((asect
->flags
& SEC_READONLY
) == 0)
2580 this_hdr
->sh_flags
|= SHF_WRITE
;
2581 if ((asect
->flags
& SEC_CODE
) != 0)
2582 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2583 if ((asect
->flags
& SEC_MERGE
) != 0)
2585 this_hdr
->sh_flags
|= SHF_MERGE
;
2586 this_hdr
->sh_entsize
= asect
->entsize
;
2587 if ((asect
->flags
& SEC_STRINGS
) != 0)
2588 this_hdr
->sh_flags
|= SHF_STRINGS
;
2590 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2591 this_hdr
->sh_flags
|= SHF_GROUP
;
2592 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2594 this_hdr
->sh_flags
|= SHF_TLS
;
2595 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2597 struct bfd_link_order
*o
;
2599 this_hdr
->sh_size
= 0;
2600 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2601 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2602 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2603 if (this_hdr
->sh_size
)
2604 this_hdr
->sh_type
= SHT_NOBITS
;
2608 /* Check for processor-specific section types. */
2609 if (bed
->elf_backend_fake_sections
2610 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2613 /* If the section has relocs, set up a section header for the
2614 SHT_REL[A] section. If two relocation sections are required for
2615 this section, it is up to the processor-specific back-end to
2616 create the other. */
2617 if ((asect
->flags
& SEC_RELOC
) != 0
2618 && !_bfd_elf_init_reloc_shdr (abfd
,
2619 &elf_section_data (asect
)->rel_hdr
,
2625 /* Fill in the contents of a SHT_GROUP section. */
2628 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2630 bfd_boolean
*failedptr
= failedptrarg
;
2631 unsigned long symindx
;
2632 asection
*elt
, *first
;
2634 struct bfd_link_order
*l
;
2637 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2642 if (elf_group_id (sec
) != NULL
)
2643 symindx
= elf_group_id (sec
)->udata
.i
;
2647 /* If called from the assembler, swap_out_syms will have set up
2648 elf_section_syms; If called for "ld -r", use target_index. */
2649 if (elf_section_syms (abfd
) != NULL
)
2650 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2652 symindx
= sec
->target_index
;
2654 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2656 /* The contents won't be allocated for "ld -r" or objcopy. */
2658 if (sec
->contents
== NULL
)
2661 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2663 /* Arrange for the section to be written out. */
2664 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2665 if (sec
->contents
== NULL
)
2672 loc
= sec
->contents
+ sec
->size
;
2674 /* Get the pointer to the first section in the group that gas
2675 squirreled away here. objcopy arranges for this to be set to the
2676 start of the input section group. */
2677 first
= elt
= elf_next_in_group (sec
);
2679 /* First element is a flag word. Rest of section is elf section
2680 indices for all the sections of the group. Write them backwards
2681 just to keep the group in the same order as given in .section
2682 directives, not that it matters. */
2691 s
= s
->output_section
;
2694 idx
= elf_section_data (s
)->this_idx
;
2695 H_PUT_32 (abfd
, idx
, loc
);
2696 elt
= elf_next_in_group (elt
);
2701 /* If this is a relocatable link, then the above did nothing because
2702 SEC is the output section. Look through the input sections
2704 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2705 if (l
->type
== bfd_indirect_link_order
2706 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2711 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2712 elt
= elf_next_in_group (elt
);
2713 /* During a relocatable link, the lists are circular. */
2715 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2717 if ((loc
-= 4) != sec
->contents
)
2720 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2723 /* Assign all ELF section numbers. The dummy first section is handled here
2724 too. The link/info pointers for the standard section types are filled
2725 in here too, while we're at it. */
2728 assign_section_numbers (bfd
*abfd
)
2730 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2732 unsigned int section_number
, secn
;
2733 Elf_Internal_Shdr
**i_shdrp
;
2738 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2740 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2742 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2744 if (section_number
== SHN_LORESERVE
)
2745 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2746 d
->this_idx
= section_number
++;
2747 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2748 if ((sec
->flags
& SEC_RELOC
) == 0)
2752 if (section_number
== SHN_LORESERVE
)
2753 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2754 d
->rel_idx
= section_number
++;
2755 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2760 if (section_number
== SHN_LORESERVE
)
2761 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2762 d
->rel_idx2
= section_number
++;
2763 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2769 if (section_number
== SHN_LORESERVE
)
2770 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2771 t
->shstrtab_section
= section_number
++;
2772 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2773 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2775 if (bfd_get_symcount (abfd
) > 0)
2777 if (section_number
== SHN_LORESERVE
)
2778 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2779 t
->symtab_section
= section_number
++;
2780 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2781 if (section_number
> SHN_LORESERVE
- 2)
2783 if (section_number
== SHN_LORESERVE
)
2784 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2785 t
->symtab_shndx_section
= section_number
++;
2786 t
->symtab_shndx_hdr
.sh_name
2787 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2788 ".symtab_shndx", FALSE
);
2789 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2792 if (section_number
== SHN_LORESERVE
)
2793 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2794 t
->strtab_section
= section_number
++;
2795 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2798 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2799 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2801 elf_numsections (abfd
) = section_number
;
2802 elf_elfheader (abfd
)->e_shnum
= section_number
;
2803 if (section_number
> SHN_LORESERVE
)
2804 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2806 /* Set up the list of section header pointers, in agreement with the
2808 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2809 i_shdrp
= bfd_zalloc (abfd
, amt
);
2810 if (i_shdrp
== NULL
)
2813 amt
= sizeof (Elf_Internal_Shdr
);
2814 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2815 if (i_shdrp
[0] == NULL
)
2817 bfd_release (abfd
, i_shdrp
);
2821 elf_elfsections (abfd
) = i_shdrp
;
2823 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2824 if (bfd_get_symcount (abfd
) > 0)
2826 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2827 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2829 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2830 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2832 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2833 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2836 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2838 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2842 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2843 if (d
->rel_idx
!= 0)
2844 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2845 if (d
->rel_idx2
!= 0)
2846 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2848 /* Fill in the sh_link and sh_info fields while we're at it. */
2850 /* sh_link of a reloc section is the section index of the symbol
2851 table. sh_info is the section index of the section to which
2852 the relocation entries apply. */
2853 if (d
->rel_idx
!= 0)
2855 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2856 d
->rel_hdr
.sh_info
= d
->this_idx
;
2858 if (d
->rel_idx2
!= 0)
2860 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2861 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2864 /* We need to set up sh_link for SHF_LINK_ORDER. */
2865 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2867 s
= elf_linked_to_section (sec
);
2869 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2872 struct bfd_link_order
*p
;
2874 /* Find out what the corresponding section in output
2876 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2878 s
= p
->u
.indirect
.section
;
2879 if (p
->type
== bfd_indirect_link_order
2880 && (bfd_get_flavour (s
->owner
)
2881 == bfd_target_elf_flavour
))
2883 Elf_Internal_Shdr
** const elf_shdrp
2884 = elf_elfsections (s
->owner
);
2886 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2887 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2889 The Intel C compiler generates SHT_IA_64_UNWIND with
2890 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2891 sh_info fields. Hence we could get the situation
2892 where elfsec is 0. */
2895 const struct elf_backend_data
*bed
2896 = get_elf_backend_data (abfd
);
2897 if (bed
->link_order_error_handler
)
2898 bed
->link_order_error_handler
2899 (_("%B: warning: sh_link not set for section `%S'"),
2904 s
= elf_shdrp
[elfsec
]->bfd_section
->output_section
;
2905 BFD_ASSERT (s
!= NULL
);
2906 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2914 switch (d
->this_hdr
.sh_type
)
2918 /* A reloc section which we are treating as a normal BFD
2919 section. sh_link is the section index of the symbol
2920 table. sh_info is the section index of the section to
2921 which the relocation entries apply. We assume that an
2922 allocated reloc section uses the dynamic symbol table.
2923 FIXME: How can we be sure? */
2924 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2926 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2928 /* We look up the section the relocs apply to by name. */
2930 if (d
->this_hdr
.sh_type
== SHT_REL
)
2934 s
= bfd_get_section_by_name (abfd
, name
);
2936 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2940 /* We assume that a section named .stab*str is a stabs
2941 string section. We look for a section with the same name
2942 but without the trailing ``str'', and set its sh_link
2943 field to point to this section. */
2944 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2945 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2950 len
= strlen (sec
->name
);
2951 alc
= bfd_malloc (len
- 2);
2954 memcpy (alc
, sec
->name
, len
- 3);
2955 alc
[len
- 3] = '\0';
2956 s
= bfd_get_section_by_name (abfd
, alc
);
2960 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2962 /* This is a .stab section. */
2963 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2964 elf_section_data (s
)->this_hdr
.sh_entsize
2965 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2972 case SHT_GNU_verneed
:
2973 case SHT_GNU_verdef
:
2974 /* sh_link is the section header index of the string table
2975 used for the dynamic entries, or the symbol table, or the
2977 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2979 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2983 case SHT_GNU_versym
:
2984 /* sh_link is the section header index of the symbol table
2985 this hash table or version table is for. */
2986 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2988 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2992 d
->this_hdr
.sh_link
= t
->symtab_section
;
2996 for (secn
= 1; secn
< section_number
; ++secn
)
2997 if (i_shdrp
[secn
] == NULL
)
2998 i_shdrp
[secn
] = i_shdrp
[0];
3000 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3001 i_shdrp
[secn
]->sh_name
);
3005 /* Map symbol from it's internal number to the external number, moving
3006 all local symbols to be at the head of the list. */
3009 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3011 /* If the backend has a special mapping, use it. */
3012 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3013 if (bed
->elf_backend_sym_is_global
)
3014 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3016 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3017 || bfd_is_und_section (bfd_get_section (sym
))
3018 || bfd_is_com_section (bfd_get_section (sym
)));
3022 elf_map_symbols (bfd
*abfd
)
3024 unsigned int symcount
= bfd_get_symcount (abfd
);
3025 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3026 asymbol
**sect_syms
;
3027 unsigned int num_locals
= 0;
3028 unsigned int num_globals
= 0;
3029 unsigned int num_locals2
= 0;
3030 unsigned int num_globals2
= 0;
3038 fprintf (stderr
, "elf_map_symbols\n");
3042 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3044 if (max_index
< asect
->index
)
3045 max_index
= asect
->index
;
3049 amt
= max_index
* sizeof (asymbol
*);
3050 sect_syms
= bfd_zalloc (abfd
, amt
);
3051 if (sect_syms
== NULL
)
3053 elf_section_syms (abfd
) = sect_syms
;
3054 elf_num_section_syms (abfd
) = max_index
;
3056 /* Init sect_syms entries for any section symbols we have already
3057 decided to output. */
3058 for (idx
= 0; idx
< symcount
; idx
++)
3060 asymbol
*sym
= syms
[idx
];
3062 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3069 if (sec
->owner
!= NULL
)
3071 if (sec
->owner
!= abfd
)
3073 if (sec
->output_offset
!= 0)
3076 sec
= sec
->output_section
;
3078 /* Empty sections in the input files may have had a
3079 section symbol created for them. (See the comment
3080 near the end of _bfd_generic_link_output_symbols in
3081 linker.c). If the linker script discards such
3082 sections then we will reach this point. Since we know
3083 that we cannot avoid this case, we detect it and skip
3084 the abort and the assignment to the sect_syms array.
3085 To reproduce this particular case try running the
3086 linker testsuite test ld-scripts/weak.exp for an ELF
3087 port that uses the generic linker. */
3088 if (sec
->owner
== NULL
)
3091 BFD_ASSERT (sec
->owner
== abfd
);
3093 sect_syms
[sec
->index
] = syms
[idx
];
3098 /* Classify all of the symbols. */
3099 for (idx
= 0; idx
< symcount
; idx
++)
3101 if (!sym_is_global (abfd
, syms
[idx
]))
3107 /* We will be adding a section symbol for each BFD section. Most normal
3108 sections will already have a section symbol in outsymbols, but
3109 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3110 at least in that case. */
3111 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3113 if (sect_syms
[asect
->index
] == NULL
)
3115 if (!sym_is_global (abfd
, asect
->symbol
))
3122 /* Now sort the symbols so the local symbols are first. */
3123 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3124 new_syms
= bfd_alloc (abfd
, amt
);
3126 if (new_syms
== NULL
)
3129 for (idx
= 0; idx
< symcount
; idx
++)
3131 asymbol
*sym
= syms
[idx
];
3134 if (!sym_is_global (abfd
, sym
))
3137 i
= num_locals
+ num_globals2
++;
3139 sym
->udata
.i
= i
+ 1;
3141 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3143 if (sect_syms
[asect
->index
] == NULL
)
3145 asymbol
*sym
= asect
->symbol
;
3148 sect_syms
[asect
->index
] = sym
;
3149 if (!sym_is_global (abfd
, sym
))
3152 i
= num_locals
+ num_globals2
++;
3154 sym
->udata
.i
= i
+ 1;
3158 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3160 elf_num_locals (abfd
) = num_locals
;
3161 elf_num_globals (abfd
) = num_globals
;
3165 /* Align to the maximum file alignment that could be required for any
3166 ELF data structure. */
3168 static inline file_ptr
3169 align_file_position (file_ptr off
, int align
)
3171 return (off
+ align
- 1) & ~(align
- 1);
3174 /* Assign a file position to a section, optionally aligning to the
3175 required section alignment. */
3178 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3186 al
= i_shdrp
->sh_addralign
;
3188 offset
= BFD_ALIGN (offset
, al
);
3190 i_shdrp
->sh_offset
= offset
;
3191 if (i_shdrp
->bfd_section
!= NULL
)
3192 i_shdrp
->bfd_section
->filepos
= offset
;
3193 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3194 offset
+= i_shdrp
->sh_size
;
3198 /* Compute the file positions we are going to put the sections at, and
3199 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3200 is not NULL, this is being called by the ELF backend linker. */
3203 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3204 struct bfd_link_info
*link_info
)
3206 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3208 struct bfd_strtab_hash
*strtab
;
3209 Elf_Internal_Shdr
*shstrtab_hdr
;
3211 if (abfd
->output_has_begun
)
3214 /* Do any elf backend specific processing first. */
3215 if (bed
->elf_backend_begin_write_processing
)
3216 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3218 if (! prep_headers (abfd
))
3221 /* Post process the headers if necessary. */
3222 if (bed
->elf_backend_post_process_headers
)
3223 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3226 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3230 if (!assign_section_numbers (abfd
))
3233 /* The backend linker builds symbol table information itself. */
3234 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3236 /* Non-zero if doing a relocatable link. */
3237 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3239 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3243 if (link_info
== NULL
)
3245 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3250 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3251 /* sh_name was set in prep_headers. */
3252 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3253 shstrtab_hdr
->sh_flags
= 0;
3254 shstrtab_hdr
->sh_addr
= 0;
3255 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3256 shstrtab_hdr
->sh_entsize
= 0;
3257 shstrtab_hdr
->sh_link
= 0;
3258 shstrtab_hdr
->sh_info
= 0;
3259 /* sh_offset is set in assign_file_positions_except_relocs. */
3260 shstrtab_hdr
->sh_addralign
= 1;
3262 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3265 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3268 Elf_Internal_Shdr
*hdr
;
3270 off
= elf_tdata (abfd
)->next_file_pos
;
3272 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3273 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3275 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3276 if (hdr
->sh_size
!= 0)
3277 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3279 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3280 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3282 elf_tdata (abfd
)->next_file_pos
= off
;
3284 /* Now that we know where the .strtab section goes, write it
3286 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3287 || ! _bfd_stringtab_emit (abfd
, strtab
))
3289 _bfd_stringtab_free (strtab
);
3292 abfd
->output_has_begun
= TRUE
;
3297 /* Create a mapping from a set of sections to a program segment. */
3299 static struct elf_segment_map
*
3300 make_mapping (bfd
*abfd
,
3301 asection
**sections
,
3306 struct elf_segment_map
*m
;
3311 amt
= sizeof (struct elf_segment_map
);
3312 amt
+= (to
- from
- 1) * sizeof (asection
*);
3313 m
= bfd_zalloc (abfd
, amt
);
3317 m
->p_type
= PT_LOAD
;
3318 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3319 m
->sections
[i
- from
] = *hdrpp
;
3320 m
->count
= to
- from
;
3322 if (from
== 0 && phdr
)
3324 /* Include the headers in the first PT_LOAD segment. */
3325 m
->includes_filehdr
= 1;
3326 m
->includes_phdrs
= 1;
3332 /* Set up a mapping from BFD sections to program segments. */
3335 map_sections_to_segments (bfd
*abfd
)
3337 asection
**sections
= NULL
;
3341 struct elf_segment_map
*mfirst
;
3342 struct elf_segment_map
**pm
;
3343 struct elf_segment_map
*m
;
3346 unsigned int phdr_index
;
3347 bfd_vma maxpagesize
;
3349 bfd_boolean phdr_in_segment
= TRUE
;
3350 bfd_boolean writable
;
3352 asection
*first_tls
= NULL
;
3353 asection
*dynsec
, *eh_frame_hdr
;
3356 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3359 if (bfd_count_sections (abfd
) == 0)
3362 /* Select the allocated sections, and sort them. */
3364 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3365 sections
= bfd_malloc (amt
);
3366 if (sections
== NULL
)
3370 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3372 if ((s
->flags
& SEC_ALLOC
) != 0)
3378 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3381 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3383 /* Build the mapping. */
3388 /* If we have a .interp section, then create a PT_PHDR segment for
3389 the program headers and a PT_INTERP segment for the .interp
3391 s
= bfd_get_section_by_name (abfd
, ".interp");
3392 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3394 amt
= sizeof (struct elf_segment_map
);
3395 m
= bfd_zalloc (abfd
, amt
);
3399 m
->p_type
= PT_PHDR
;
3400 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3401 m
->p_flags
= PF_R
| PF_X
;
3402 m
->p_flags_valid
= 1;
3403 m
->includes_phdrs
= 1;
3408 amt
= sizeof (struct elf_segment_map
);
3409 m
= bfd_zalloc (abfd
, amt
);
3413 m
->p_type
= PT_INTERP
;
3421 /* Look through the sections. We put sections in the same program
3422 segment when the start of the second section can be placed within
3423 a few bytes of the end of the first section. */
3427 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3429 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3431 && (dynsec
->flags
& SEC_LOAD
) == 0)
3434 /* Deal with -Ttext or something similar such that the first section
3435 is not adjacent to the program headers. This is an
3436 approximation, since at this point we don't know exactly how many
3437 program headers we will need. */
3440 bfd_size_type phdr_size
;
3442 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3444 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3445 if ((abfd
->flags
& D_PAGED
) == 0
3446 || sections
[0]->lma
< phdr_size
3447 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3448 phdr_in_segment
= FALSE
;
3451 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3454 bfd_boolean new_segment
;
3458 /* See if this section and the last one will fit in the same
3461 if (last_hdr
== NULL
)
3463 /* If we don't have a segment yet, then we don't need a new
3464 one (we build the last one after this loop). */
3465 new_segment
= FALSE
;
3467 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3469 /* If this section has a different relation between the
3470 virtual address and the load address, then we need a new
3474 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3475 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3477 /* If putting this section in this segment would force us to
3478 skip a page in the segment, then we need a new segment. */
3481 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3482 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3484 /* We don't want to put a loadable section after a
3485 nonloadable section in the same segment.
3486 Consider .tbss sections as loadable for this purpose. */
3489 else if ((abfd
->flags
& D_PAGED
) == 0)
3491 /* If the file is not demand paged, which means that we
3492 don't require the sections to be correctly aligned in the
3493 file, then there is no other reason for a new segment. */
3494 new_segment
= FALSE
;
3497 && (hdr
->flags
& SEC_READONLY
) == 0
3498 && (((last_hdr
->lma
+ last_size
- 1)
3499 & ~(maxpagesize
- 1))
3500 != (hdr
->lma
& ~(maxpagesize
- 1))))
3502 /* We don't want to put a writable section in a read only
3503 segment, unless they are on the same page in memory
3504 anyhow. We already know that the last section does not
3505 bring us past the current section on the page, so the
3506 only case in which the new section is not on the same
3507 page as the previous section is when the previous section
3508 ends precisely on a page boundary. */
3513 /* Otherwise, we can use the same segment. */
3514 new_segment
= FALSE
;
3519 if ((hdr
->flags
& SEC_READONLY
) == 0)
3522 /* .tbss sections effectively have zero size. */
3523 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3524 last_size
= hdr
->size
;
3530 /* We need a new program segment. We must create a new program
3531 header holding all the sections from phdr_index until hdr. */
3533 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3540 if ((hdr
->flags
& SEC_READONLY
) == 0)
3546 /* .tbss sections effectively have zero size. */
3547 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3548 last_size
= hdr
->size
;
3552 phdr_in_segment
= FALSE
;
3555 /* Create a final PT_LOAD program segment. */
3556 if (last_hdr
!= NULL
)
3558 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3566 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3569 amt
= sizeof (struct elf_segment_map
);
3570 m
= bfd_zalloc (abfd
, amt
);
3574 m
->p_type
= PT_DYNAMIC
;
3576 m
->sections
[0] = dynsec
;
3582 /* For each loadable .note section, add a PT_NOTE segment. We don't
3583 use bfd_get_section_by_name, because if we link together
3584 nonloadable .note sections and loadable .note sections, we will
3585 generate two .note sections in the output file. FIXME: Using
3586 names for section types is bogus anyhow. */
3587 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3589 if ((s
->flags
& SEC_LOAD
) != 0
3590 && strncmp (s
->name
, ".note", 5) == 0)
3592 amt
= sizeof (struct elf_segment_map
);
3593 m
= bfd_zalloc (abfd
, amt
);
3597 m
->p_type
= PT_NOTE
;
3604 if (s
->flags
& SEC_THREAD_LOCAL
)
3612 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3617 amt
= sizeof (struct elf_segment_map
);
3618 amt
+= (tls_count
- 1) * sizeof (asection
*);
3619 m
= bfd_zalloc (abfd
, amt
);
3624 m
->count
= tls_count
;
3625 /* Mandated PF_R. */
3627 m
->p_flags_valid
= 1;
3628 for (i
= 0; i
< tls_count
; ++i
)
3630 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3631 m
->sections
[i
] = first_tls
;
3632 first_tls
= first_tls
->next
;
3639 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3641 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3642 if (eh_frame_hdr
!= NULL
3643 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3645 amt
= sizeof (struct elf_segment_map
);
3646 m
= bfd_zalloc (abfd
, amt
);
3650 m
->p_type
= PT_GNU_EH_FRAME
;
3652 m
->sections
[0] = eh_frame_hdr
->output_section
;
3658 if (elf_tdata (abfd
)->stack_flags
)
3660 amt
= sizeof (struct elf_segment_map
);
3661 m
= bfd_zalloc (abfd
, amt
);
3665 m
->p_type
= PT_GNU_STACK
;
3666 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3667 m
->p_flags_valid
= 1;
3673 if (elf_tdata (abfd
)->relro
)
3675 amt
= sizeof (struct elf_segment_map
);
3676 m
= bfd_zalloc (abfd
, amt
);
3680 m
->p_type
= PT_GNU_RELRO
;
3682 m
->p_flags_valid
= 1;
3691 elf_tdata (abfd
)->segment_map
= mfirst
;
3695 if (sections
!= NULL
)
3700 /* Sort sections by address. */
3703 elf_sort_sections (const void *arg1
, const void *arg2
)
3705 const asection
*sec1
= *(const asection
**) arg1
;
3706 const asection
*sec2
= *(const asection
**) arg2
;
3707 bfd_size_type size1
, size2
;
3709 /* Sort by LMA first, since this is the address used to
3710 place the section into a segment. */
3711 if (sec1
->lma
< sec2
->lma
)
3713 else if (sec1
->lma
> sec2
->lma
)
3716 /* Then sort by VMA. Normally the LMA and the VMA will be
3717 the same, and this will do nothing. */
3718 if (sec1
->vma
< sec2
->vma
)
3720 else if (sec1
->vma
> sec2
->vma
)
3723 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3725 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3731 /* If the indicies are the same, do not return 0
3732 here, but continue to try the next comparison. */
3733 if (sec1
->target_index
- sec2
->target_index
!= 0)
3734 return sec1
->target_index
- sec2
->target_index
;
3739 else if (TOEND (sec2
))
3744 /* Sort by size, to put zero sized sections
3745 before others at the same address. */
3747 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3748 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3755 return sec1
->target_index
- sec2
->target_index
;
3758 /* Ian Lance Taylor writes:
3760 We shouldn't be using % with a negative signed number. That's just
3761 not good. We have to make sure either that the number is not
3762 negative, or that the number has an unsigned type. When the types
3763 are all the same size they wind up as unsigned. When file_ptr is a
3764 larger signed type, the arithmetic winds up as signed long long,
3767 What we're trying to say here is something like ``increase OFF by
3768 the least amount that will cause it to be equal to the VMA modulo
3770 /* In other words, something like:
3772 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3773 off_offset = off % bed->maxpagesize;
3774 if (vma_offset < off_offset)
3775 adjustment = vma_offset + bed->maxpagesize - off_offset;
3777 adjustment = vma_offset - off_offset;
3779 which can can be collapsed into the expression below. */
3782 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3784 return ((vma
- off
) % maxpagesize
);
3787 /* Assign file positions to the sections based on the mapping from
3788 sections to segments. This function also sets up some fields in
3789 the file header, and writes out the program headers. */
3792 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3794 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3796 struct elf_segment_map
*m
;
3798 Elf_Internal_Phdr
*phdrs
;
3800 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3801 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3802 Elf_Internal_Phdr
*p
;
3805 if (elf_tdata (abfd
)->segment_map
== NULL
)
3807 if (! map_sections_to_segments (abfd
))
3812 /* The placement algorithm assumes that non allocated sections are
3813 not in PT_LOAD segments. We ensure this here by removing such
3814 sections from the segment map. */
3815 for (m
= elf_tdata (abfd
)->segment_map
;
3819 unsigned int new_count
;
3822 if (m
->p_type
!= PT_LOAD
)
3826 for (i
= 0; i
< m
->count
; i
++)
3828 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3831 m
->sections
[new_count
] = m
->sections
[i
];
3837 if (new_count
!= m
->count
)
3838 m
->count
= new_count
;
3842 if (bed
->elf_backend_modify_segment_map
)
3844 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3849 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3852 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3853 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3854 elf_elfheader (abfd
)->e_phnum
= count
;
3859 /* If we already counted the number of program segments, make sure
3860 that we allocated enough space. This happens when SIZEOF_HEADERS
3861 is used in a linker script. */
3862 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3863 if (alloc
!= 0 && count
> alloc
)
3865 ((*_bfd_error_handler
)
3866 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3867 bfd_get_filename (abfd
), alloc
, count
));
3868 bfd_set_error (bfd_error_bad_value
);
3875 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3876 phdrs
= bfd_alloc (abfd
, amt
);
3880 off
= bed
->s
->sizeof_ehdr
;
3881 off
+= alloc
* bed
->s
->sizeof_phdr
;
3888 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3895 /* If elf_segment_map is not from map_sections_to_segments, the
3896 sections may not be correctly ordered. NOTE: sorting should
3897 not be done to the PT_NOTE section of a corefile, which may
3898 contain several pseudo-sections artificially created by bfd.
3899 Sorting these pseudo-sections breaks things badly. */
3901 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3902 && m
->p_type
== PT_NOTE
))
3903 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3906 p
->p_type
= m
->p_type
;
3907 p
->p_flags
= m
->p_flags
;
3909 if (p
->p_type
== PT_LOAD
3911 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3913 if ((abfd
->flags
& D_PAGED
) != 0)
3914 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3918 bfd_size_type align
;
3921 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3923 bfd_size_type secalign
;
3925 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3926 if (secalign
> align
)
3930 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3934 /* Make sure the .dynamic section is the first section in the
3935 PT_DYNAMIC segment. */
3936 else if (p
->p_type
== PT_DYNAMIC
3938 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
3941 (_("%s: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
3942 bfd_get_filename (abfd
));
3943 bfd_set_error (bfd_error_bad_value
);
3950 p
->p_vaddr
= m
->sections
[0]->vma
;
3952 if (m
->p_paddr_valid
)
3953 p
->p_paddr
= m
->p_paddr
;
3954 else if (m
->count
== 0)
3957 p
->p_paddr
= m
->sections
[0]->lma
;
3959 if (p
->p_type
== PT_LOAD
3960 && (abfd
->flags
& D_PAGED
) != 0)
3961 p
->p_align
= bed
->maxpagesize
;
3962 else if (m
->count
== 0)
3963 p
->p_align
= 1 << bed
->s
->log_file_align
;
3971 if (m
->includes_filehdr
)
3973 if (! m
->p_flags_valid
)
3976 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3977 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3980 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3982 if (p
->p_vaddr
< (bfd_vma
) off
)
3984 (*_bfd_error_handler
)
3985 (_("%s: Not enough room for program headers, try linking with -N"),
3986 bfd_get_filename (abfd
));
3987 bfd_set_error (bfd_error_bad_value
);
3992 if (! m
->p_paddr_valid
)
3995 if (p
->p_type
== PT_LOAD
)
3997 filehdr_vaddr
= p
->p_vaddr
;
3998 filehdr_paddr
= p
->p_paddr
;
4002 if (m
->includes_phdrs
)
4004 if (! m
->p_flags_valid
)
4007 if (m
->includes_filehdr
)
4009 if (p
->p_type
== PT_LOAD
)
4011 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4012 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4017 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4021 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4022 p
->p_vaddr
-= off
- p
->p_offset
;
4023 if (! m
->p_paddr_valid
)
4024 p
->p_paddr
-= off
- p
->p_offset
;
4027 if (p
->p_type
== PT_LOAD
)
4029 phdrs_vaddr
= p
->p_vaddr
;
4030 phdrs_paddr
= p
->p_paddr
;
4033 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4036 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4037 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4040 if (p
->p_type
== PT_LOAD
4041 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4043 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4049 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4050 p
->p_filesz
+= adjust
;
4051 p
->p_memsz
+= adjust
;
4057 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4061 bfd_size_type align
;
4065 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4067 /* The section may have artificial alignment forced by a
4068 link script. Notice this case by the gap between the
4069 cumulative phdr lma and the section's lma. */
4070 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
4072 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4074 p
->p_memsz
+= adjust
;
4075 if (p
->p_type
== PT_LOAD
4076 || (p
->p_type
== PT_NOTE
4077 && bfd_get_format (abfd
) == bfd_core
))
4082 if ((flags
& SEC_LOAD
) != 0
4083 || (flags
& SEC_THREAD_LOCAL
) != 0)
4084 p
->p_filesz
+= adjust
;
4087 if (p
->p_type
== PT_LOAD
)
4089 bfd_signed_vma adjust
;
4091 if ((flags
& SEC_LOAD
) != 0)
4093 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4097 else if ((flags
& SEC_ALLOC
) != 0)
4099 /* The section VMA must equal the file position
4100 modulo the page size. FIXME: I'm not sure if
4101 this adjustment is really necessary. We used to
4102 not have the SEC_LOAD case just above, and then
4103 this was necessary, but now I'm not sure. */
4104 if ((abfd
->flags
& D_PAGED
) != 0)
4105 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4108 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4118 (* _bfd_error_handler
) (_("\
4119 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4120 bfd_section_name (abfd
, sec
),
4125 p
->p_memsz
+= adjust
;
4128 if ((flags
& SEC_LOAD
) != 0)
4129 p
->p_filesz
+= adjust
;
4134 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4135 used in a linker script we may have a section with
4136 SEC_LOAD clear but which is supposed to have
4138 if ((flags
& SEC_LOAD
) != 0
4139 || (flags
& SEC_HAS_CONTENTS
) != 0)
4142 if ((flags
& SEC_ALLOC
) != 0
4143 && ((flags
& SEC_LOAD
) != 0
4144 || (flags
& SEC_THREAD_LOCAL
) == 0))
4148 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4150 /* The actual "note" segment has i == 0.
4151 This is the one that actually contains everything. */
4155 p
->p_filesz
= sec
->size
;
4161 /* Fake sections -- don't need to be written. */
4164 flags
= sec
->flags
= 0;
4171 if ((sec
->flags
& SEC_LOAD
) != 0
4172 || (sec
->flags
& SEC_THREAD_LOCAL
) == 0
4173 || p
->p_type
== PT_TLS
)
4174 p
->p_memsz
+= sec
->size
;
4176 if ((flags
& SEC_LOAD
) != 0)
4177 p
->p_filesz
+= sec
->size
;
4179 if (p
->p_type
== PT_TLS
4181 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4183 struct bfd_link_order
*o
;
4184 bfd_vma tbss_size
= 0;
4186 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4187 if (tbss_size
< o
->offset
+ o
->size
)
4188 tbss_size
= o
->offset
+ o
->size
;
4190 p
->p_memsz
+= tbss_size
;
4193 if (align
> p
->p_align
4194 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4198 if (! m
->p_flags_valid
)
4201 if ((flags
& SEC_CODE
) != 0)
4203 if ((flags
& SEC_READONLY
) == 0)
4209 /* Now that we have set the section file positions, we can set up
4210 the file positions for the non PT_LOAD segments. */
4211 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4215 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4217 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4218 p
->p_offset
= m
->sections
[0]->filepos
;
4222 if (m
->includes_filehdr
)
4224 p
->p_vaddr
= filehdr_vaddr
;
4225 if (! m
->p_paddr_valid
)
4226 p
->p_paddr
= filehdr_paddr
;
4228 else if (m
->includes_phdrs
)
4230 p
->p_vaddr
= phdrs_vaddr
;
4231 if (! m
->p_paddr_valid
)
4232 p
->p_paddr
= phdrs_paddr
;
4234 else if (p
->p_type
== PT_GNU_RELRO
)
4236 Elf_Internal_Phdr
*lp
;
4238 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4240 if (lp
->p_type
== PT_LOAD
4241 && lp
->p_vaddr
<= link_info
->relro_end
4242 && lp
->p_vaddr
>= link_info
->relro_start
4243 && lp
->p_vaddr
+ lp
->p_filesz
4244 >= link_info
->relro_end
)
4248 if (lp
< phdrs
+ count
4249 && link_info
->relro_end
> lp
->p_vaddr
)
4251 p
->p_vaddr
= lp
->p_vaddr
;
4252 p
->p_paddr
= lp
->p_paddr
;
4253 p
->p_offset
= lp
->p_offset
;
4254 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4255 p
->p_memsz
= p
->p_filesz
;
4257 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4261 memset (p
, 0, sizeof *p
);
4262 p
->p_type
= PT_NULL
;
4268 /* Clear out any program headers we allocated but did not use. */
4269 for (; count
< alloc
; count
++, p
++)
4271 memset (p
, 0, sizeof *p
);
4272 p
->p_type
= PT_NULL
;
4275 elf_tdata (abfd
)->phdr
= phdrs
;
4277 elf_tdata (abfd
)->next_file_pos
= off
;
4279 /* Write out the program headers. */
4280 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4281 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4287 /* Get the size of the program header.
4289 If this is called by the linker before any of the section VMA's are set, it
4290 can't calculate the correct value for a strange memory layout. This only
4291 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4292 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4293 data segment (exclusive of .interp and .dynamic).
4295 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4296 will be two segments. */
4298 static bfd_size_type
4299 get_program_header_size (bfd
*abfd
)
4303 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4305 /* We can't return a different result each time we're called. */
4306 if (elf_tdata (abfd
)->program_header_size
!= 0)
4307 return elf_tdata (abfd
)->program_header_size
;
4309 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4311 struct elf_segment_map
*m
;
4314 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4316 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4317 return elf_tdata (abfd
)->program_header_size
;
4320 /* Assume we will need exactly two PT_LOAD segments: one for text
4321 and one for data. */
4324 s
= bfd_get_section_by_name (abfd
, ".interp");
4325 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4327 /* If we have a loadable interpreter section, we need a
4328 PT_INTERP segment. In this case, assume we also need a
4329 PT_PHDR segment, although that may not be true for all
4334 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4336 /* We need a PT_DYNAMIC segment. */
4340 if (elf_tdata (abfd
)->eh_frame_hdr
)
4342 /* We need a PT_GNU_EH_FRAME segment. */
4346 if (elf_tdata (abfd
)->stack_flags
)
4348 /* We need a PT_GNU_STACK segment. */
4352 if (elf_tdata (abfd
)->relro
)
4354 /* We need a PT_GNU_RELRO segment. */
4358 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4360 if ((s
->flags
& SEC_LOAD
) != 0
4361 && strncmp (s
->name
, ".note", 5) == 0)
4363 /* We need a PT_NOTE segment. */
4368 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4370 if (s
->flags
& SEC_THREAD_LOCAL
)
4372 /* We need a PT_TLS segment. */
4378 /* Let the backend count up any program headers it might need. */
4379 if (bed
->elf_backend_additional_program_headers
)
4383 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4389 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4390 return elf_tdata (abfd
)->program_header_size
;
4393 /* Work out the file positions of all the sections. This is called by
4394 _bfd_elf_compute_section_file_positions. All the section sizes and
4395 VMAs must be known before this is called.
4397 We do not consider reloc sections at this point, unless they form
4398 part of the loadable image. Reloc sections are assigned file
4399 positions in assign_file_positions_for_relocs, which is called by
4400 write_object_contents and final_link.
4402 We also don't set the positions of the .symtab and .strtab here. */
4405 assign_file_positions_except_relocs (bfd
*abfd
,
4406 struct bfd_link_info
*link_info
)
4408 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4409 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4410 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4411 unsigned int num_sec
= elf_numsections (abfd
);
4413 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4415 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4416 && bfd_get_format (abfd
) != bfd_core
)
4418 Elf_Internal_Shdr
**hdrpp
;
4421 /* Start after the ELF header. */
4422 off
= i_ehdrp
->e_ehsize
;
4424 /* We are not creating an executable, which means that we are
4425 not creating a program header, and that the actual order of
4426 the sections in the file is unimportant. */
4427 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4429 Elf_Internal_Shdr
*hdr
;
4432 if (hdr
->sh_type
== SHT_REL
4433 || hdr
->sh_type
== SHT_RELA
4434 || i
== tdata
->symtab_section
4435 || i
== tdata
->symtab_shndx_section
4436 || i
== tdata
->strtab_section
)
4438 hdr
->sh_offset
= -1;
4441 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4443 if (i
== SHN_LORESERVE
- 1)
4445 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4446 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4453 Elf_Internal_Shdr
**hdrpp
;
4455 /* Assign file positions for the loaded sections based on the
4456 assignment of sections to segments. */
4457 if (! assign_file_positions_for_segments (abfd
, link_info
))
4460 /* Assign file positions for the other sections. */
4462 off
= elf_tdata (abfd
)->next_file_pos
;
4463 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4465 Elf_Internal_Shdr
*hdr
;
4468 if (hdr
->bfd_section
!= NULL
4469 && hdr
->bfd_section
->filepos
!= 0)
4470 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4471 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4473 ((*_bfd_error_handler
)
4474 (_("%s: warning: allocated section `%s' not in segment"),
4475 bfd_get_filename (abfd
),
4476 (hdr
->bfd_section
== NULL
4478 : hdr
->bfd_section
->name
)));
4479 if ((abfd
->flags
& D_PAGED
) != 0)
4480 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4483 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4485 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4488 else if (hdr
->sh_type
== SHT_REL
4489 || hdr
->sh_type
== SHT_RELA
4490 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4491 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4492 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4493 hdr
->sh_offset
= -1;
4495 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4497 if (i
== SHN_LORESERVE
- 1)
4499 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4500 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4505 /* Place the section headers. */
4506 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4507 i_ehdrp
->e_shoff
= off
;
4508 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4510 elf_tdata (abfd
)->next_file_pos
= off
;
4516 prep_headers (bfd
*abfd
)
4518 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4519 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4520 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4521 struct elf_strtab_hash
*shstrtab
;
4522 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4524 i_ehdrp
= elf_elfheader (abfd
);
4525 i_shdrp
= elf_elfsections (abfd
);
4527 shstrtab
= _bfd_elf_strtab_init ();
4528 if (shstrtab
== NULL
)
4531 elf_shstrtab (abfd
) = shstrtab
;
4533 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4534 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4535 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4536 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4538 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4539 i_ehdrp
->e_ident
[EI_DATA
] =
4540 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4541 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4543 if ((abfd
->flags
& DYNAMIC
) != 0)
4544 i_ehdrp
->e_type
= ET_DYN
;
4545 else if ((abfd
->flags
& EXEC_P
) != 0)
4546 i_ehdrp
->e_type
= ET_EXEC
;
4547 else if (bfd_get_format (abfd
) == bfd_core
)
4548 i_ehdrp
->e_type
= ET_CORE
;
4550 i_ehdrp
->e_type
= ET_REL
;
4552 switch (bfd_get_arch (abfd
))
4554 case bfd_arch_unknown
:
4555 i_ehdrp
->e_machine
= EM_NONE
;
4558 /* There used to be a long list of cases here, each one setting
4559 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4560 in the corresponding bfd definition. To avoid duplication,
4561 the switch was removed. Machines that need special handling
4562 can generally do it in elf_backend_final_write_processing(),
4563 unless they need the information earlier than the final write.
4564 Such need can generally be supplied by replacing the tests for
4565 e_machine with the conditions used to determine it. */
4567 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4570 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4571 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4573 /* No program header, for now. */
4574 i_ehdrp
->e_phoff
= 0;
4575 i_ehdrp
->e_phentsize
= 0;
4576 i_ehdrp
->e_phnum
= 0;
4578 /* Each bfd section is section header entry. */
4579 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4580 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4582 /* If we're building an executable, we'll need a program header table. */
4583 if (abfd
->flags
& EXEC_P
)
4585 /* It all happens later. */
4587 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4589 /* elf_build_phdrs() returns a (NULL-terminated) array of
4590 Elf_Internal_Phdrs. */
4591 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4592 i_ehdrp
->e_phoff
= outbase
;
4593 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4598 i_ehdrp
->e_phentsize
= 0;
4600 i_ehdrp
->e_phoff
= 0;
4603 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4604 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4605 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4606 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4607 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4608 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4609 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4610 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4611 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4617 /* Assign file positions for all the reloc sections which are not part
4618 of the loadable file image. */
4621 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4624 unsigned int i
, num_sec
;
4625 Elf_Internal_Shdr
**shdrpp
;
4627 off
= elf_tdata (abfd
)->next_file_pos
;
4629 num_sec
= elf_numsections (abfd
);
4630 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4632 Elf_Internal_Shdr
*shdrp
;
4635 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4636 && shdrp
->sh_offset
== -1)
4637 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4640 elf_tdata (abfd
)->next_file_pos
= off
;
4644 _bfd_elf_write_object_contents (bfd
*abfd
)
4646 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4647 Elf_Internal_Ehdr
*i_ehdrp
;
4648 Elf_Internal_Shdr
**i_shdrp
;
4650 unsigned int count
, num_sec
;
4652 if (! abfd
->output_has_begun
4653 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4656 i_shdrp
= elf_elfsections (abfd
);
4657 i_ehdrp
= elf_elfheader (abfd
);
4660 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4664 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4666 /* After writing the headers, we need to write the sections too... */
4667 num_sec
= elf_numsections (abfd
);
4668 for (count
= 1; count
< num_sec
; count
++)
4670 if (bed
->elf_backend_section_processing
)
4671 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4672 if (i_shdrp
[count
]->contents
)
4674 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4676 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4677 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4680 if (count
== SHN_LORESERVE
- 1)
4681 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4684 /* Write out the section header names. */
4685 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4686 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4689 if (bed
->elf_backend_final_write_processing
)
4690 (*bed
->elf_backend_final_write_processing
) (abfd
,
4691 elf_tdata (abfd
)->linker
);
4693 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4697 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4699 /* Hopefully this can be done just like an object file. */
4700 return _bfd_elf_write_object_contents (abfd
);
4703 /* Given a section, search the header to find them. */
4706 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4708 const struct elf_backend_data
*bed
;
4711 if (elf_section_data (asect
) != NULL
4712 && elf_section_data (asect
)->this_idx
!= 0)
4713 return elf_section_data (asect
)->this_idx
;
4715 if (bfd_is_abs_section (asect
))
4717 else if (bfd_is_com_section (asect
))
4719 else if (bfd_is_und_section (asect
))
4723 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4724 int maxindex
= elf_numsections (abfd
);
4726 for (index
= 1; index
< maxindex
; index
++)
4728 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4730 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4736 bed
= get_elf_backend_data (abfd
);
4737 if (bed
->elf_backend_section_from_bfd_section
)
4741 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4746 bfd_set_error (bfd_error_nonrepresentable_section
);
4751 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4755 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4757 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4759 flagword flags
= asym_ptr
->flags
;
4761 /* When gas creates relocations against local labels, it creates its
4762 own symbol for the section, but does put the symbol into the
4763 symbol chain, so udata is 0. When the linker is generating
4764 relocatable output, this section symbol may be for one of the
4765 input sections rather than the output section. */
4766 if (asym_ptr
->udata
.i
== 0
4767 && (flags
& BSF_SECTION_SYM
)
4768 && asym_ptr
->section
)
4772 if (asym_ptr
->section
->output_section
!= NULL
)
4773 indx
= asym_ptr
->section
->output_section
->index
;
4775 indx
= asym_ptr
->section
->index
;
4776 if (indx
< elf_num_section_syms (abfd
)
4777 && elf_section_syms (abfd
)[indx
] != NULL
)
4778 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4781 idx
= asym_ptr
->udata
.i
;
4785 /* This case can occur when using --strip-symbol on a symbol
4786 which is used in a relocation entry. */
4787 (*_bfd_error_handler
)
4788 (_("%B: symbol `%s' required but not present"),
4789 abfd
, bfd_asymbol_name (asym_ptr
));
4790 bfd_set_error (bfd_error_no_symbols
);
4797 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4798 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4799 elf_symbol_flags (flags
));
4807 /* Copy private BFD data. This copies any program header information. */
4810 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4812 Elf_Internal_Ehdr
*iehdr
;
4813 struct elf_segment_map
*map
;
4814 struct elf_segment_map
*map_first
;
4815 struct elf_segment_map
**pointer_to_map
;
4816 Elf_Internal_Phdr
*segment
;
4819 unsigned int num_segments
;
4820 bfd_boolean phdr_included
= FALSE
;
4821 bfd_vma maxpagesize
;
4822 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4823 unsigned int phdr_adjust_num
= 0;
4824 const struct elf_backend_data
*bed
;
4826 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4827 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4830 if (elf_tdata (ibfd
)->phdr
== NULL
)
4833 bed
= get_elf_backend_data (ibfd
);
4834 iehdr
= elf_elfheader (ibfd
);
4837 pointer_to_map
= &map_first
;
4839 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4840 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4842 /* Returns the end address of the segment + 1. */
4843 #define SEGMENT_END(segment, start) \
4844 (start + (segment->p_memsz > segment->p_filesz \
4845 ? segment->p_memsz : segment->p_filesz))
4847 #define SECTION_SIZE(section, segment) \
4848 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4849 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4850 ? section->size : 0)
4852 /* Returns TRUE if the given section is contained within
4853 the given segment. VMA addresses are compared. */
4854 #define IS_CONTAINED_BY_VMA(section, segment) \
4855 (section->vma >= segment->p_vaddr \
4856 && (section->vma + SECTION_SIZE (section, segment) \
4857 <= (SEGMENT_END (segment, segment->p_vaddr))))
4859 /* Returns TRUE if the given section is contained within
4860 the given segment. LMA addresses are compared. */
4861 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4862 (section->lma >= base \
4863 && (section->lma + SECTION_SIZE (section, segment) \
4864 <= SEGMENT_END (segment, base)))
4866 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4867 #define IS_COREFILE_NOTE(p, s) \
4868 (p->p_type == PT_NOTE \
4869 && bfd_get_format (ibfd) == bfd_core \
4870 && s->vma == 0 && s->lma == 0 \
4871 && (bfd_vma) s->filepos >= p->p_offset \
4872 && ((bfd_vma) s->filepos + s->size \
4873 <= p->p_offset + p->p_filesz))
4875 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4876 linker, which generates a PT_INTERP section with p_vaddr and
4877 p_memsz set to 0. */
4878 #define IS_SOLARIS_PT_INTERP(p, s) \
4880 && p->p_paddr == 0 \
4881 && p->p_memsz == 0 \
4882 && p->p_filesz > 0 \
4883 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4885 && (bfd_vma) s->filepos >= p->p_offset \
4886 && ((bfd_vma) s->filepos + s->size \
4887 <= p->p_offset + p->p_filesz))
4889 /* Decide if the given section should be included in the given segment.
4890 A section will be included if:
4891 1. It is within the address space of the segment -- we use the LMA
4892 if that is set for the segment and the VMA otherwise,
4893 2. It is an allocated segment,
4894 3. There is an output section associated with it,
4895 4. The section has not already been allocated to a previous segment.
4896 5. PT_GNU_STACK segments do not include any sections.
4897 6. PT_TLS segment includes only SHF_TLS sections.
4898 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4899 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4900 ((((segment->p_paddr \
4901 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4902 : IS_CONTAINED_BY_VMA (section, segment)) \
4903 && (section->flags & SEC_ALLOC) != 0) \
4904 || IS_COREFILE_NOTE (segment, section)) \
4905 && section->output_section != NULL \
4906 && segment->p_type != PT_GNU_STACK \
4907 && (segment->p_type != PT_TLS \
4908 || (section->flags & SEC_THREAD_LOCAL)) \
4909 && (segment->p_type == PT_LOAD \
4910 || segment->p_type == PT_TLS \
4911 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4912 && ! section->segment_mark)
4914 /* Returns TRUE iff seg1 starts after the end of seg2. */
4915 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4916 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4918 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4919 their VMA address ranges and their LMA address ranges overlap.
4920 It is possible to have overlapping VMA ranges without overlapping LMA
4921 ranges. RedBoot images for example can have both .data and .bss mapped
4922 to the same VMA range, but with the .data section mapped to a different
4924 #define SEGMENT_OVERLAPS(seg1, seg2) \
4925 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4926 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4927 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4928 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4930 /* Initialise the segment mark field. */
4931 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4932 section
->segment_mark
= FALSE
;
4934 /* Scan through the segments specified in the program header
4935 of the input BFD. For this first scan we look for overlaps
4936 in the loadable segments. These can be created by weird
4937 parameters to objcopy. Also, fix some solaris weirdness. */
4938 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4943 Elf_Internal_Phdr
*segment2
;
4945 if (segment
->p_type
== PT_INTERP
)
4946 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4947 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4949 /* Mininal change so that the normal section to segment
4950 assignment code will work. */
4951 segment
->p_vaddr
= section
->vma
;
4955 if (segment
->p_type
!= PT_LOAD
)
4958 /* Determine if this segment overlaps any previous segments. */
4959 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4961 bfd_signed_vma extra_length
;
4963 if (segment2
->p_type
!= PT_LOAD
4964 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4967 /* Merge the two segments together. */
4968 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4970 /* Extend SEGMENT2 to include SEGMENT and then delete
4973 SEGMENT_END (segment
, segment
->p_vaddr
)
4974 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4976 if (extra_length
> 0)
4978 segment2
->p_memsz
+= extra_length
;
4979 segment2
->p_filesz
+= extra_length
;
4982 segment
->p_type
= PT_NULL
;
4984 /* Since we have deleted P we must restart the outer loop. */
4986 segment
= elf_tdata (ibfd
)->phdr
;
4991 /* Extend SEGMENT to include SEGMENT2 and then delete
4994 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4995 - SEGMENT_END (segment
, segment
->p_vaddr
);
4997 if (extra_length
> 0)
4999 segment
->p_memsz
+= extra_length
;
5000 segment
->p_filesz
+= extra_length
;
5003 segment2
->p_type
= PT_NULL
;
5008 /* The second scan attempts to assign sections to segments. */
5009 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5013 unsigned int section_count
;
5014 asection
** sections
;
5015 asection
* output_section
;
5017 bfd_vma matching_lma
;
5018 bfd_vma suggested_lma
;
5022 if (segment
->p_type
== PT_NULL
)
5025 /* Compute how many sections might be placed into this segment. */
5026 for (section
= ibfd
->sections
, section_count
= 0;
5028 section
= section
->next
)
5029 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5032 /* Allocate a segment map big enough to contain
5033 all of the sections we have selected. */
5034 amt
= sizeof (struct elf_segment_map
);
5035 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5036 map
= bfd_alloc (obfd
, amt
);
5040 /* Initialise the fields of the segment map. Default to
5041 using the physical address of the segment in the input BFD. */
5043 map
->p_type
= segment
->p_type
;
5044 map
->p_flags
= segment
->p_flags
;
5045 map
->p_flags_valid
= 1;
5046 map
->p_paddr
= segment
->p_paddr
;
5047 map
->p_paddr_valid
= 1;
5049 /* Determine if this segment contains the ELF file header
5050 and if it contains the program headers themselves. */
5051 map
->includes_filehdr
= (segment
->p_offset
== 0
5052 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5054 map
->includes_phdrs
= 0;
5056 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5058 map
->includes_phdrs
=
5059 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5060 && (segment
->p_offset
+ segment
->p_filesz
5061 >= ((bfd_vma
) iehdr
->e_phoff
5062 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5064 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5065 phdr_included
= TRUE
;
5068 if (section_count
== 0)
5070 /* Special segments, such as the PT_PHDR segment, may contain
5071 no sections, but ordinary, loadable segments should contain
5072 something. They are allowed by the ELF spec however, so only
5073 a warning is produced. */
5074 if (segment
->p_type
== PT_LOAD
)
5075 (*_bfd_error_handler
)
5076 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5080 *pointer_to_map
= map
;
5081 pointer_to_map
= &map
->next
;
5086 /* Now scan the sections in the input BFD again and attempt
5087 to add their corresponding output sections to the segment map.
5088 The problem here is how to handle an output section which has
5089 been moved (ie had its LMA changed). There are four possibilities:
5091 1. None of the sections have been moved.
5092 In this case we can continue to use the segment LMA from the
5095 2. All of the sections have been moved by the same amount.
5096 In this case we can change the segment's LMA to match the LMA
5097 of the first section.
5099 3. Some of the sections have been moved, others have not.
5100 In this case those sections which have not been moved can be
5101 placed in the current segment which will have to have its size,
5102 and possibly its LMA changed, and a new segment or segments will
5103 have to be created to contain the other sections.
5105 4. The sections have been moved, but not by the same amount.
5106 In this case we can change the segment's LMA to match the LMA
5107 of the first section and we will have to create a new segment
5108 or segments to contain the other sections.
5110 In order to save time, we allocate an array to hold the section
5111 pointers that we are interested in. As these sections get assigned
5112 to a segment, they are removed from this array. */
5114 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5115 to work around this long long bug. */
5116 amt
= section_count
* sizeof (asection
*);
5117 sections
= bfd_malloc (amt
);
5118 if (sections
== NULL
)
5121 /* Step One: Scan for segment vs section LMA conflicts.
5122 Also add the sections to the section array allocated above.
5123 Also add the sections to the current segment. In the common
5124 case, where the sections have not been moved, this means that
5125 we have completely filled the segment, and there is nothing
5131 for (j
= 0, section
= ibfd
->sections
;
5133 section
= section
->next
)
5135 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5137 output_section
= section
->output_section
;
5139 sections
[j
++] = section
;
5141 /* The Solaris native linker always sets p_paddr to 0.
5142 We try to catch that case here, and set it to the
5143 correct value. Note - some backends require that
5144 p_paddr be left as zero. */
5145 if (segment
->p_paddr
== 0
5146 && segment
->p_vaddr
!= 0
5147 && (! bed
->want_p_paddr_set_to_zero
)
5149 && output_section
->lma
!= 0
5150 && (output_section
->vma
== (segment
->p_vaddr
5151 + (map
->includes_filehdr
5154 + (map
->includes_phdrs
5156 * iehdr
->e_phentsize
)
5158 map
->p_paddr
= segment
->p_vaddr
;
5160 /* Match up the physical address of the segment with the
5161 LMA address of the output section. */
5162 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5163 || IS_COREFILE_NOTE (segment
, section
)
5164 || (bed
->want_p_paddr_set_to_zero
&&
5165 IS_CONTAINED_BY_VMA (output_section
, segment
))
5168 if (matching_lma
== 0)
5169 matching_lma
= output_section
->lma
;
5171 /* We assume that if the section fits within the segment
5172 then it does not overlap any other section within that
5174 map
->sections
[isec
++] = output_section
;
5176 else if (suggested_lma
== 0)
5177 suggested_lma
= output_section
->lma
;
5181 BFD_ASSERT (j
== section_count
);
5183 /* Step Two: Adjust the physical address of the current segment,
5185 if (isec
== section_count
)
5187 /* All of the sections fitted within the segment as currently
5188 specified. This is the default case. Add the segment to
5189 the list of built segments and carry on to process the next
5190 program header in the input BFD. */
5191 map
->count
= section_count
;
5192 *pointer_to_map
= map
;
5193 pointer_to_map
= &map
->next
;
5200 if (matching_lma
!= 0)
5202 /* At least one section fits inside the current segment.
5203 Keep it, but modify its physical address to match the
5204 LMA of the first section that fitted. */
5205 map
->p_paddr
= matching_lma
;
5209 /* None of the sections fitted inside the current segment.
5210 Change the current segment's physical address to match
5211 the LMA of the first section. */
5212 map
->p_paddr
= suggested_lma
;
5215 /* Offset the segment physical address from the lma
5216 to allow for space taken up by elf headers. */
5217 if (map
->includes_filehdr
)
5218 map
->p_paddr
-= iehdr
->e_ehsize
;
5220 if (map
->includes_phdrs
)
5222 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5224 /* iehdr->e_phnum is just an estimate of the number
5225 of program headers that we will need. Make a note
5226 here of the number we used and the segment we chose
5227 to hold these headers, so that we can adjust the
5228 offset when we know the correct value. */
5229 phdr_adjust_num
= iehdr
->e_phnum
;
5230 phdr_adjust_seg
= map
;
5234 /* Step Three: Loop over the sections again, this time assigning
5235 those that fit to the current segment and removing them from the
5236 sections array; but making sure not to leave large gaps. Once all
5237 possible sections have been assigned to the current segment it is
5238 added to the list of built segments and if sections still remain
5239 to be assigned, a new segment is constructed before repeating
5247 /* Fill the current segment with sections that fit. */
5248 for (j
= 0; j
< section_count
; j
++)
5250 section
= sections
[j
];
5252 if (section
== NULL
)
5255 output_section
= section
->output_section
;
5257 BFD_ASSERT (output_section
!= NULL
);
5259 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5260 || IS_COREFILE_NOTE (segment
, section
))
5262 if (map
->count
== 0)
5264 /* If the first section in a segment does not start at
5265 the beginning of the segment, then something is
5267 if (output_section
->lma
!=
5269 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5270 + (map
->includes_phdrs
5271 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5277 asection
* prev_sec
;
5279 prev_sec
= map
->sections
[map
->count
- 1];
5281 /* If the gap between the end of the previous section
5282 and the start of this section is more than
5283 maxpagesize then we need to start a new segment. */
5284 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5286 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5287 || ((prev_sec
->lma
+ prev_sec
->size
)
5288 > output_section
->lma
))
5290 if (suggested_lma
== 0)
5291 suggested_lma
= output_section
->lma
;
5297 map
->sections
[map
->count
++] = output_section
;
5300 section
->segment_mark
= TRUE
;
5302 else if (suggested_lma
== 0)
5303 suggested_lma
= output_section
->lma
;
5306 BFD_ASSERT (map
->count
> 0);
5308 /* Add the current segment to the list of built segments. */
5309 *pointer_to_map
= map
;
5310 pointer_to_map
= &map
->next
;
5312 if (isec
< section_count
)
5314 /* We still have not allocated all of the sections to
5315 segments. Create a new segment here, initialise it
5316 and carry on looping. */
5317 amt
= sizeof (struct elf_segment_map
);
5318 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5319 map
= bfd_alloc (obfd
, amt
);
5326 /* Initialise the fields of the segment map. Set the physical
5327 physical address to the LMA of the first section that has
5328 not yet been assigned. */
5330 map
->p_type
= segment
->p_type
;
5331 map
->p_flags
= segment
->p_flags
;
5332 map
->p_flags_valid
= 1;
5333 map
->p_paddr
= suggested_lma
;
5334 map
->p_paddr_valid
= 1;
5335 map
->includes_filehdr
= 0;
5336 map
->includes_phdrs
= 0;
5339 while (isec
< section_count
);
5344 /* The Solaris linker creates program headers in which all the
5345 p_paddr fields are zero. When we try to objcopy or strip such a
5346 file, we get confused. Check for this case, and if we find it
5347 reset the p_paddr_valid fields. */
5348 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5349 if (map
->p_paddr
!= 0)
5352 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5353 map
->p_paddr_valid
= 0;
5355 elf_tdata (obfd
)->segment_map
= map_first
;
5357 /* If we had to estimate the number of program headers that were
5358 going to be needed, then check our estimate now and adjust
5359 the offset if necessary. */
5360 if (phdr_adjust_seg
!= NULL
)
5364 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5367 if (count
> phdr_adjust_num
)
5368 phdr_adjust_seg
->p_paddr
5369 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5373 /* Final Step: Sort the segments into ascending order of physical
5375 if (map_first
!= NULL
)
5377 struct elf_segment_map
*prev
;
5380 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5382 /* Yes I know - its a bubble sort.... */
5383 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5385 /* Swap map and map->next. */
5386 prev
->next
= map
->next
;
5387 map
->next
= map
->next
->next
;
5388 prev
->next
->next
= map
;
5399 #undef IS_CONTAINED_BY_VMA
5400 #undef IS_CONTAINED_BY_LMA
5401 #undef IS_COREFILE_NOTE
5402 #undef IS_SOLARIS_PT_INTERP
5403 #undef INCLUDE_SECTION_IN_SEGMENT
5404 #undef SEGMENT_AFTER_SEGMENT
5405 #undef SEGMENT_OVERLAPS
5409 /* Copy private section information. This copies over the entsize
5410 field, and sometimes the info field. */
5413 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5418 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5420 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5421 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5424 ihdr
= &elf_section_data (isec
)->this_hdr
;
5425 ohdr
= &elf_section_data (osec
)->this_hdr
;
5427 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5429 if (ihdr
->sh_type
== SHT_SYMTAB
5430 || ihdr
->sh_type
== SHT_DYNSYM
5431 || ihdr
->sh_type
== SHT_GNU_verneed
5432 || ihdr
->sh_type
== SHT_GNU_verdef
)
5433 ohdr
->sh_info
= ihdr
->sh_info
;
5435 /* Set things up for objcopy. The output SHT_GROUP section will
5436 have its elf_next_in_group pointing back to the input group
5438 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5439 elf_group_name (osec
) = elf_group_name (isec
);
5441 osec
->use_rela_p
= isec
->use_rela_p
;
5446 /* Copy private header information. */
5449 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5451 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5452 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5455 /* Copy over private BFD data if it has not already been copied.
5456 This must be done here, rather than in the copy_private_bfd_data
5457 entry point, because the latter is called after the section
5458 contents have been set, which means that the program headers have
5459 already been worked out. */
5460 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5462 if (! copy_private_bfd_data (ibfd
, obfd
))
5469 /* Copy private symbol information. If this symbol is in a section
5470 which we did not map into a BFD section, try to map the section
5471 index correctly. We use special macro definitions for the mapped
5472 section indices; these definitions are interpreted by the
5473 swap_out_syms function. */
5475 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5476 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5477 #define MAP_STRTAB (SHN_HIOS + 3)
5478 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5479 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5482 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5487 elf_symbol_type
*isym
, *osym
;
5489 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5490 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5493 isym
= elf_symbol_from (ibfd
, isymarg
);
5494 osym
= elf_symbol_from (obfd
, osymarg
);
5498 && bfd_is_abs_section (isym
->symbol
.section
))
5502 shndx
= isym
->internal_elf_sym
.st_shndx
;
5503 if (shndx
== elf_onesymtab (ibfd
))
5504 shndx
= MAP_ONESYMTAB
;
5505 else if (shndx
== elf_dynsymtab (ibfd
))
5506 shndx
= MAP_DYNSYMTAB
;
5507 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5509 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5510 shndx
= MAP_SHSTRTAB
;
5511 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5512 shndx
= MAP_SYM_SHNDX
;
5513 osym
->internal_elf_sym
.st_shndx
= shndx
;
5519 /* Swap out the symbols. */
5522 swap_out_syms (bfd
*abfd
,
5523 struct bfd_strtab_hash
**sttp
,
5526 const struct elf_backend_data
*bed
;
5529 struct bfd_strtab_hash
*stt
;
5530 Elf_Internal_Shdr
*symtab_hdr
;
5531 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5532 Elf_Internal_Shdr
*symstrtab_hdr
;
5533 char *outbound_syms
;
5534 char *outbound_shndx
;
5537 bfd_boolean name_local_sections
;
5539 if (!elf_map_symbols (abfd
))
5542 /* Dump out the symtabs. */
5543 stt
= _bfd_elf_stringtab_init ();
5547 bed
= get_elf_backend_data (abfd
);
5548 symcount
= bfd_get_symcount (abfd
);
5549 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5550 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5551 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5552 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5553 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5554 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5556 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5557 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5559 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5560 outbound_syms
= bfd_alloc (abfd
, amt
);
5561 if (outbound_syms
== NULL
)
5563 _bfd_stringtab_free (stt
);
5566 symtab_hdr
->contents
= outbound_syms
;
5568 outbound_shndx
= NULL
;
5569 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5570 if (symtab_shndx_hdr
->sh_name
!= 0)
5572 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5573 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5574 if (outbound_shndx
== NULL
)
5576 _bfd_stringtab_free (stt
);
5580 symtab_shndx_hdr
->contents
= outbound_shndx
;
5581 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5582 symtab_shndx_hdr
->sh_size
= amt
;
5583 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5584 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5587 /* Now generate the data (for "contents"). */
5589 /* Fill in zeroth symbol and swap it out. */
5590 Elf_Internal_Sym sym
;
5596 sym
.st_shndx
= SHN_UNDEF
;
5597 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5598 outbound_syms
+= bed
->s
->sizeof_sym
;
5599 if (outbound_shndx
!= NULL
)
5600 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5604 = (bed
->elf_backend_name_local_section_symbols
5605 && bed
->elf_backend_name_local_section_symbols (abfd
));
5607 syms
= bfd_get_outsymbols (abfd
);
5608 for (idx
= 0; idx
< symcount
; idx
++)
5610 Elf_Internal_Sym sym
;
5611 bfd_vma value
= syms
[idx
]->value
;
5612 elf_symbol_type
*type_ptr
;
5613 flagword flags
= syms
[idx
]->flags
;
5616 if (!name_local_sections
5617 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5619 /* Local section symbols have no name. */
5624 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5627 if (sym
.st_name
== (unsigned long) -1)
5629 _bfd_stringtab_free (stt
);
5634 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5636 if ((flags
& BSF_SECTION_SYM
) == 0
5637 && bfd_is_com_section (syms
[idx
]->section
))
5639 /* ELF common symbols put the alignment into the `value' field,
5640 and the size into the `size' field. This is backwards from
5641 how BFD handles it, so reverse it here. */
5642 sym
.st_size
= value
;
5643 if (type_ptr
== NULL
5644 || type_ptr
->internal_elf_sym
.st_value
== 0)
5645 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5647 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5648 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5649 (abfd
, syms
[idx
]->section
);
5653 asection
*sec
= syms
[idx
]->section
;
5656 if (sec
->output_section
)
5658 value
+= sec
->output_offset
;
5659 sec
= sec
->output_section
;
5662 /* Don't add in the section vma for relocatable output. */
5663 if (! relocatable_p
)
5665 sym
.st_value
= value
;
5666 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5668 if (bfd_is_abs_section (sec
)
5670 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5672 /* This symbol is in a real ELF section which we did
5673 not create as a BFD section. Undo the mapping done
5674 by copy_private_symbol_data. */
5675 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5679 shndx
= elf_onesymtab (abfd
);
5682 shndx
= elf_dynsymtab (abfd
);
5685 shndx
= elf_tdata (abfd
)->strtab_section
;
5688 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5691 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5699 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5705 /* Writing this would be a hell of a lot easier if
5706 we had some decent documentation on bfd, and
5707 knew what to expect of the library, and what to
5708 demand of applications. For example, it
5709 appears that `objcopy' might not set the
5710 section of a symbol to be a section that is
5711 actually in the output file. */
5712 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5715 _bfd_error_handler (_("\
5716 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5717 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5719 bfd_set_error (bfd_error_invalid_operation
);
5720 _bfd_stringtab_free (stt
);
5724 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5725 BFD_ASSERT (shndx
!= -1);
5729 sym
.st_shndx
= shndx
;
5732 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5734 else if ((flags
& BSF_FUNCTION
) != 0)
5736 else if ((flags
& BSF_OBJECT
) != 0)
5741 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5744 /* Processor-specific types. */
5745 if (type_ptr
!= NULL
5746 && bed
->elf_backend_get_symbol_type
)
5747 type
= ((*bed
->elf_backend_get_symbol_type
)
5748 (&type_ptr
->internal_elf_sym
, type
));
5750 if (flags
& BSF_SECTION_SYM
)
5752 if (flags
& BSF_GLOBAL
)
5753 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5755 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5757 else if (bfd_is_com_section (syms
[idx
]->section
))
5758 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5759 else if (bfd_is_und_section (syms
[idx
]->section
))
5760 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5764 else if (flags
& BSF_FILE
)
5765 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5768 int bind
= STB_LOCAL
;
5770 if (flags
& BSF_LOCAL
)
5772 else if (flags
& BSF_WEAK
)
5774 else if (flags
& BSF_GLOBAL
)
5777 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5780 if (type_ptr
!= NULL
)
5781 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5785 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5786 outbound_syms
+= bed
->s
->sizeof_sym
;
5787 if (outbound_shndx
!= NULL
)
5788 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5792 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5793 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5795 symstrtab_hdr
->sh_flags
= 0;
5796 symstrtab_hdr
->sh_addr
= 0;
5797 symstrtab_hdr
->sh_entsize
= 0;
5798 symstrtab_hdr
->sh_link
= 0;
5799 symstrtab_hdr
->sh_info
= 0;
5800 symstrtab_hdr
->sh_addralign
= 1;
5805 /* Return the number of bytes required to hold the symtab vector.
5807 Note that we base it on the count plus 1, since we will null terminate
5808 the vector allocated based on this size. However, the ELF symbol table
5809 always has a dummy entry as symbol #0, so it ends up even. */
5812 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5816 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5818 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5819 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5821 symtab_size
-= sizeof (asymbol
*);
5827 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5831 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5833 if (elf_dynsymtab (abfd
) == 0)
5835 bfd_set_error (bfd_error_invalid_operation
);
5839 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5840 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5842 symtab_size
-= sizeof (asymbol
*);
5848 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5851 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5854 /* Canonicalize the relocs. */
5857 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5864 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5866 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5869 tblptr
= section
->relocation
;
5870 for (i
= 0; i
< section
->reloc_count
; i
++)
5871 *relptr
++ = tblptr
++;
5875 return section
->reloc_count
;
5879 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5881 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5882 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5885 bfd_get_symcount (abfd
) = symcount
;
5890 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5891 asymbol
**allocation
)
5893 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5894 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5897 bfd_get_dynamic_symcount (abfd
) = symcount
;
5901 /* Return the size required for the dynamic reloc entries. Any
5902 section that was actually installed in the BFD, and has type
5903 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5904 considered to be a dynamic reloc section. */
5907 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5912 if (elf_dynsymtab (abfd
) == 0)
5914 bfd_set_error (bfd_error_invalid_operation
);
5918 ret
= sizeof (arelent
*);
5919 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5920 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5921 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5922 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5923 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5924 * sizeof (arelent
*));
5929 /* Canonicalize the dynamic relocation entries. Note that we return
5930 the dynamic relocations as a single block, although they are
5931 actually associated with particular sections; the interface, which
5932 was designed for SunOS style shared libraries, expects that there
5933 is only one set of dynamic relocs. Any section that was actually
5934 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5935 the dynamic symbol table, is considered to be a dynamic reloc
5939 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
5943 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5947 if (elf_dynsymtab (abfd
) == 0)
5949 bfd_set_error (bfd_error_invalid_operation
);
5953 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5955 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5957 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5958 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5959 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5964 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
5966 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5968 for (i
= 0; i
< count
; i
++)
5979 /* Read in the version information. */
5982 _bfd_elf_slurp_version_tables (bfd
*abfd
)
5984 bfd_byte
*contents
= NULL
;
5987 if (elf_dynverdef (abfd
) != 0)
5989 Elf_Internal_Shdr
*hdr
;
5990 Elf_External_Verdef
*everdef
;
5991 Elf_Internal_Verdef
*iverdef
;
5992 Elf_Internal_Verdef
*iverdefarr
;
5993 Elf_Internal_Verdef iverdefmem
;
5995 unsigned int maxidx
;
5997 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5999 contents
= bfd_malloc (hdr
->sh_size
);
6000 if (contents
== NULL
)
6002 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6003 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6006 /* We know the number of entries in the section but not the maximum
6007 index. Therefore we have to run through all entries and find
6009 everdef
= (Elf_External_Verdef
*) contents
;
6011 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6013 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6015 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6016 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6018 everdef
= ((Elf_External_Verdef
*)
6019 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6022 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6023 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6024 if (elf_tdata (abfd
)->verdef
== NULL
)
6027 elf_tdata (abfd
)->cverdefs
= maxidx
;
6029 everdef
= (Elf_External_Verdef
*) contents
;
6030 iverdefarr
= elf_tdata (abfd
)->verdef
;
6031 for (i
= 0; i
< hdr
->sh_info
; i
++)
6033 Elf_External_Verdaux
*everdaux
;
6034 Elf_Internal_Verdaux
*iverdaux
;
6037 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6039 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6040 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6042 iverdef
->vd_bfd
= abfd
;
6044 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6045 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6046 if (iverdef
->vd_auxptr
== NULL
)
6049 everdaux
= ((Elf_External_Verdaux
*)
6050 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6051 iverdaux
= iverdef
->vd_auxptr
;
6052 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6054 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6056 iverdaux
->vda_nodename
=
6057 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6058 iverdaux
->vda_name
);
6059 if (iverdaux
->vda_nodename
== NULL
)
6062 if (j
+ 1 < iverdef
->vd_cnt
)
6063 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6065 iverdaux
->vda_nextptr
= NULL
;
6067 everdaux
= ((Elf_External_Verdaux
*)
6068 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6071 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6073 if (i
+ 1 < hdr
->sh_info
)
6074 iverdef
->vd_nextdef
= iverdef
+ 1;
6076 iverdef
->vd_nextdef
= NULL
;
6078 everdef
= ((Elf_External_Verdef
*)
6079 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6086 if (elf_dynverref (abfd
) != 0)
6088 Elf_Internal_Shdr
*hdr
;
6089 Elf_External_Verneed
*everneed
;
6090 Elf_Internal_Verneed
*iverneed
;
6093 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6095 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6096 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6097 if (elf_tdata (abfd
)->verref
== NULL
)
6100 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6102 contents
= bfd_malloc (hdr
->sh_size
);
6103 if (contents
== NULL
)
6105 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6106 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6109 everneed
= (Elf_External_Verneed
*) contents
;
6110 iverneed
= elf_tdata (abfd
)->verref
;
6111 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6113 Elf_External_Vernaux
*evernaux
;
6114 Elf_Internal_Vernaux
*ivernaux
;
6117 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6119 iverneed
->vn_bfd
= abfd
;
6121 iverneed
->vn_filename
=
6122 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6124 if (iverneed
->vn_filename
== NULL
)
6127 amt
= iverneed
->vn_cnt
;
6128 amt
*= sizeof (Elf_Internal_Vernaux
);
6129 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6131 evernaux
= ((Elf_External_Vernaux
*)
6132 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6133 ivernaux
= iverneed
->vn_auxptr
;
6134 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6136 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6138 ivernaux
->vna_nodename
=
6139 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6140 ivernaux
->vna_name
);
6141 if (ivernaux
->vna_nodename
== NULL
)
6144 if (j
+ 1 < iverneed
->vn_cnt
)
6145 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6147 ivernaux
->vna_nextptr
= NULL
;
6149 evernaux
= ((Elf_External_Vernaux
*)
6150 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6153 if (i
+ 1 < hdr
->sh_info
)
6154 iverneed
->vn_nextref
= iverneed
+ 1;
6156 iverneed
->vn_nextref
= NULL
;
6158 everneed
= ((Elf_External_Verneed
*)
6159 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6169 if (contents
!= NULL
)
6175 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6177 elf_symbol_type
*newsym
;
6178 bfd_size_type amt
= sizeof (elf_symbol_type
);
6180 newsym
= bfd_zalloc (abfd
, amt
);
6185 newsym
->symbol
.the_bfd
= abfd
;
6186 return &newsym
->symbol
;
6191 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6195 bfd_symbol_info (symbol
, ret
);
6198 /* Return whether a symbol name implies a local symbol. Most targets
6199 use this function for the is_local_label_name entry point, but some
6203 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6206 /* Normal local symbols start with ``.L''. */
6207 if (name
[0] == '.' && name
[1] == 'L')
6210 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6211 DWARF debugging symbols starting with ``..''. */
6212 if (name
[0] == '.' && name
[1] == '.')
6215 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6216 emitting DWARF debugging output. I suspect this is actually a
6217 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6218 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6219 underscore to be emitted on some ELF targets). For ease of use,
6220 we treat such symbols as local. */
6221 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6228 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6229 asymbol
*symbol ATTRIBUTE_UNUSED
)
6236 _bfd_elf_set_arch_mach (bfd
*abfd
,
6237 enum bfd_architecture arch
,
6238 unsigned long machine
)
6240 /* If this isn't the right architecture for this backend, and this
6241 isn't the generic backend, fail. */
6242 if (arch
!= get_elf_backend_data (abfd
)->arch
6243 && arch
!= bfd_arch_unknown
6244 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6247 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6250 /* Find the function to a particular section and offset,
6251 for error reporting. */
6254 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6258 const char **filename_ptr
,
6259 const char **functionname_ptr
)
6261 const char *filename
;
6270 for (p
= symbols
; *p
!= NULL
; p
++)
6274 q
= (elf_symbol_type
*) *p
;
6276 if (bfd_get_section (&q
->symbol
) != section
)
6279 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6284 filename
= bfd_asymbol_name (&q
->symbol
);
6288 if (q
->symbol
.section
== section
6289 && q
->symbol
.value
>= low_func
6290 && q
->symbol
.value
<= offset
)
6292 func
= (asymbol
*) q
;
6293 low_func
= q
->symbol
.value
;
6303 *filename_ptr
= filename
;
6304 if (functionname_ptr
)
6305 *functionname_ptr
= bfd_asymbol_name (func
);
6310 /* Find the nearest line to a particular section and offset,
6311 for error reporting. */
6314 _bfd_elf_find_nearest_line (bfd
*abfd
,
6318 const char **filename_ptr
,
6319 const char **functionname_ptr
,
6320 unsigned int *line_ptr
)
6324 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6325 filename_ptr
, functionname_ptr
,
6328 if (!*functionname_ptr
)
6329 elf_find_function (abfd
, section
, symbols
, offset
,
6330 *filename_ptr
? NULL
: filename_ptr
,
6336 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6337 filename_ptr
, functionname_ptr
,
6339 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6341 if (!*functionname_ptr
)
6342 elf_find_function (abfd
, section
, symbols
, offset
,
6343 *filename_ptr
? NULL
: filename_ptr
,
6349 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6350 &found
, filename_ptr
,
6351 functionname_ptr
, line_ptr
,
6352 &elf_tdata (abfd
)->line_info
))
6354 if (found
&& (*functionname_ptr
|| *line_ptr
))
6357 if (symbols
== NULL
)
6360 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6361 filename_ptr
, functionname_ptr
))
6369 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6373 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6375 ret
+= get_program_header_size (abfd
);
6380 _bfd_elf_set_section_contents (bfd
*abfd
,
6382 const void *location
,
6384 bfd_size_type count
)
6386 Elf_Internal_Shdr
*hdr
;
6389 if (! abfd
->output_has_begun
6390 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6393 hdr
= &elf_section_data (section
)->this_hdr
;
6394 pos
= hdr
->sh_offset
+ offset
;
6395 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6396 || bfd_bwrite (location
, count
, abfd
) != count
)
6403 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6404 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6405 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6410 /* Try to convert a non-ELF reloc into an ELF one. */
6413 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6415 /* Check whether we really have an ELF howto. */
6417 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6419 bfd_reloc_code_real_type code
;
6420 reloc_howto_type
*howto
;
6422 /* Alien reloc: Try to determine its type to replace it with an
6423 equivalent ELF reloc. */
6425 if (areloc
->howto
->pc_relative
)
6427 switch (areloc
->howto
->bitsize
)
6430 code
= BFD_RELOC_8_PCREL
;
6433 code
= BFD_RELOC_12_PCREL
;
6436 code
= BFD_RELOC_16_PCREL
;
6439 code
= BFD_RELOC_24_PCREL
;
6442 code
= BFD_RELOC_32_PCREL
;
6445 code
= BFD_RELOC_64_PCREL
;
6451 howto
= bfd_reloc_type_lookup (abfd
, code
);
6453 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6455 if (howto
->pcrel_offset
)
6456 areloc
->addend
+= areloc
->address
;
6458 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6463 switch (areloc
->howto
->bitsize
)
6469 code
= BFD_RELOC_14
;
6472 code
= BFD_RELOC_16
;
6475 code
= BFD_RELOC_26
;
6478 code
= BFD_RELOC_32
;
6481 code
= BFD_RELOC_64
;
6487 howto
= bfd_reloc_type_lookup (abfd
, code
);
6491 areloc
->howto
= howto
;
6499 (*_bfd_error_handler
)
6500 (_("%B: unsupported relocation type %s"),
6501 abfd
, areloc
->howto
->name
);
6502 bfd_set_error (bfd_error_bad_value
);
6507 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6509 if (bfd_get_format (abfd
) == bfd_object
)
6511 if (elf_shstrtab (abfd
) != NULL
)
6512 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6515 return _bfd_generic_close_and_cleanup (abfd
);
6518 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6519 in the relocation's offset. Thus we cannot allow any sort of sanity
6520 range-checking to interfere. There is nothing else to do in processing
6523 bfd_reloc_status_type
6524 _bfd_elf_rel_vtable_reloc_fn
6525 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6526 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6527 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6528 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6530 return bfd_reloc_ok
;
6533 /* Elf core file support. Much of this only works on native
6534 toolchains, since we rely on knowing the
6535 machine-dependent procfs structure in order to pick
6536 out details about the corefile. */
6538 #ifdef HAVE_SYS_PROCFS_H
6539 # include <sys/procfs.h>
6542 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6545 elfcore_make_pid (bfd
*abfd
)
6547 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6548 + (elf_tdata (abfd
)->core_pid
));
6551 /* If there isn't a section called NAME, make one, using
6552 data from SECT. Note, this function will generate a
6553 reference to NAME, so you shouldn't deallocate or
6557 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6561 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6564 sect2
= bfd_make_section (abfd
, name
);
6568 sect2
->size
= sect
->size
;
6569 sect2
->filepos
= sect
->filepos
;
6570 sect2
->flags
= sect
->flags
;
6571 sect2
->alignment_power
= sect
->alignment_power
;
6575 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6576 actually creates up to two pseudosections:
6577 - For the single-threaded case, a section named NAME, unless
6578 such a section already exists.
6579 - For the multi-threaded case, a section named "NAME/PID", where
6580 PID is elfcore_make_pid (abfd).
6581 Both pseudosections have identical contents. */
6583 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6589 char *threaded_name
;
6593 /* Build the section name. */
6595 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6596 len
= strlen (buf
) + 1;
6597 threaded_name
= bfd_alloc (abfd
, len
);
6598 if (threaded_name
== NULL
)
6600 memcpy (threaded_name
, buf
, len
);
6602 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6606 sect
->filepos
= filepos
;
6607 sect
->flags
= SEC_HAS_CONTENTS
;
6608 sect
->alignment_power
= 2;
6610 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6613 /* prstatus_t exists on:
6615 linux 2.[01] + glibc
6619 #if defined (HAVE_PRSTATUS_T)
6622 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6627 if (note
->descsz
== sizeof (prstatus_t
))
6631 size
= sizeof (prstat
.pr_reg
);
6632 offset
= offsetof (prstatus_t
, pr_reg
);
6633 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6635 /* Do not overwrite the core signal if it
6636 has already been set by another thread. */
6637 if (elf_tdata (abfd
)->core_signal
== 0)
6638 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6639 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6641 /* pr_who exists on:
6644 pr_who doesn't exist on:
6647 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6648 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6651 #if defined (HAVE_PRSTATUS32_T)
6652 else if (note
->descsz
== sizeof (prstatus32_t
))
6654 /* 64-bit host, 32-bit corefile */
6655 prstatus32_t prstat
;
6657 size
= sizeof (prstat
.pr_reg
);
6658 offset
= offsetof (prstatus32_t
, pr_reg
);
6659 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6661 /* Do not overwrite the core signal if it
6662 has already been set by another thread. */
6663 if (elf_tdata (abfd
)->core_signal
== 0)
6664 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6665 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6667 /* pr_who exists on:
6670 pr_who doesn't exist on:
6673 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6674 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6677 #endif /* HAVE_PRSTATUS32_T */
6680 /* Fail - we don't know how to handle any other
6681 note size (ie. data object type). */
6685 /* Make a ".reg/999" section and a ".reg" section. */
6686 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6687 size
, note
->descpos
+ offset
);
6689 #endif /* defined (HAVE_PRSTATUS_T) */
6691 /* Create a pseudosection containing the exact contents of NOTE. */
6693 elfcore_make_note_pseudosection (bfd
*abfd
,
6695 Elf_Internal_Note
*note
)
6697 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6698 note
->descsz
, note
->descpos
);
6701 /* There isn't a consistent prfpregset_t across platforms,
6702 but it doesn't matter, because we don't have to pick this
6703 data structure apart. */
6706 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6708 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6711 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6712 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6716 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6718 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6721 #if defined (HAVE_PRPSINFO_T)
6722 typedef prpsinfo_t elfcore_psinfo_t
;
6723 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6724 typedef prpsinfo32_t elfcore_psinfo32_t
;
6728 #if defined (HAVE_PSINFO_T)
6729 typedef psinfo_t elfcore_psinfo_t
;
6730 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6731 typedef psinfo32_t elfcore_psinfo32_t
;
6735 /* return a malloc'ed copy of a string at START which is at
6736 most MAX bytes long, possibly without a terminating '\0'.
6737 the copy will always have a terminating '\0'. */
6740 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6743 char *end
= memchr (start
, '\0', max
);
6751 dups
= bfd_alloc (abfd
, len
+ 1);
6755 memcpy (dups
, start
, len
);
6761 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6763 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6765 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6767 elfcore_psinfo_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
));
6779 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6780 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6782 /* 64-bit host, 32-bit corefile */
6783 elfcore_psinfo32_t psinfo
;
6785 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6787 elf_tdata (abfd
)->core_program
6788 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6789 sizeof (psinfo
.pr_fname
));
6791 elf_tdata (abfd
)->core_command
6792 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6793 sizeof (psinfo
.pr_psargs
));
6799 /* Fail - we don't know how to handle any other
6800 note size (ie. data object type). */
6804 /* Note that for some reason, a spurious space is tacked
6805 onto the end of the args in some (at least one anyway)
6806 implementations, so strip it off if it exists. */
6809 char *command
= elf_tdata (abfd
)->core_command
;
6810 int n
= strlen (command
);
6812 if (0 < n
&& command
[n
- 1] == ' ')
6813 command
[n
- 1] = '\0';
6818 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6820 #if defined (HAVE_PSTATUS_T)
6822 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6824 if (note
->descsz
== sizeof (pstatus_t
)
6825 #if defined (HAVE_PXSTATUS_T)
6826 || note
->descsz
== sizeof (pxstatus_t
)
6832 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6834 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6836 #if defined (HAVE_PSTATUS32_T)
6837 else if (note
->descsz
== sizeof (pstatus32_t
))
6839 /* 64-bit host, 32-bit corefile */
6842 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6844 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6847 /* Could grab some more details from the "representative"
6848 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6849 NT_LWPSTATUS note, presumably. */
6853 #endif /* defined (HAVE_PSTATUS_T) */
6855 #if defined (HAVE_LWPSTATUS_T)
6857 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6859 lwpstatus_t lwpstat
;
6865 if (note
->descsz
!= sizeof (lwpstat
)
6866 #if defined (HAVE_LWPXSTATUS_T)
6867 && note
->descsz
!= sizeof (lwpxstatus_t
)
6872 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6874 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6875 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6877 /* Make a ".reg/999" section. */
6879 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6880 len
= strlen (buf
) + 1;
6881 name
= bfd_alloc (abfd
, len
);
6884 memcpy (name
, buf
, len
);
6886 sect
= bfd_make_section_anyway (abfd
, name
);
6890 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6891 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6892 sect
->filepos
= note
->descpos
6893 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6896 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6897 sect
->size
= sizeof (lwpstat
.pr_reg
);
6898 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6901 sect
->flags
= SEC_HAS_CONTENTS
;
6902 sect
->alignment_power
= 2;
6904 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6907 /* Make a ".reg2/999" section */
6909 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6910 len
= strlen (buf
) + 1;
6911 name
= bfd_alloc (abfd
, len
);
6914 memcpy (name
, buf
, len
);
6916 sect
= bfd_make_section_anyway (abfd
, name
);
6920 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6921 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6922 sect
->filepos
= note
->descpos
6923 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6926 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6927 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
6928 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6931 sect
->flags
= SEC_HAS_CONTENTS
;
6932 sect
->alignment_power
= 2;
6934 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6936 #endif /* defined (HAVE_LWPSTATUS_T) */
6938 #if defined (HAVE_WIN32_PSTATUS_T)
6940 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6946 win32_pstatus_t pstatus
;
6948 if (note
->descsz
< sizeof (pstatus
))
6951 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6953 switch (pstatus
.data_type
)
6955 case NOTE_INFO_PROCESS
:
6956 /* FIXME: need to add ->core_command. */
6957 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6958 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6961 case NOTE_INFO_THREAD
:
6962 /* Make a ".reg/999" section. */
6963 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6965 len
= strlen (buf
) + 1;
6966 name
= bfd_alloc (abfd
, len
);
6970 memcpy (name
, buf
, len
);
6972 sect
= bfd_make_section_anyway (abfd
, name
);
6976 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6977 sect
->filepos
= (note
->descpos
6978 + offsetof (struct win32_pstatus
,
6979 data
.thread_info
.thread_context
));
6980 sect
->flags
= SEC_HAS_CONTENTS
;
6981 sect
->alignment_power
= 2;
6983 if (pstatus
.data
.thread_info
.is_active_thread
)
6984 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6988 case NOTE_INFO_MODULE
:
6989 /* Make a ".module/xxxxxxxx" section. */
6990 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6992 len
= strlen (buf
) + 1;
6993 name
= bfd_alloc (abfd
, len
);
6997 memcpy (name
, buf
, len
);
6999 sect
= bfd_make_section_anyway (abfd
, name
);
7004 sect
->size
= note
->descsz
;
7005 sect
->filepos
= note
->descpos
;
7006 sect
->flags
= SEC_HAS_CONTENTS
;
7007 sect
->alignment_power
= 2;
7016 #endif /* HAVE_WIN32_PSTATUS_T */
7019 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7021 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7029 if (bed
->elf_backend_grok_prstatus
)
7030 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7032 #if defined (HAVE_PRSTATUS_T)
7033 return elfcore_grok_prstatus (abfd
, note
);
7038 #if defined (HAVE_PSTATUS_T)
7040 return elfcore_grok_pstatus (abfd
, note
);
7043 #if defined (HAVE_LWPSTATUS_T)
7045 return elfcore_grok_lwpstatus (abfd
, note
);
7048 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7049 return elfcore_grok_prfpreg (abfd
, note
);
7051 #if defined (HAVE_WIN32_PSTATUS_T)
7052 case NT_WIN32PSTATUS
:
7053 return elfcore_grok_win32pstatus (abfd
, note
);
7056 case NT_PRXFPREG
: /* Linux SSE extension */
7057 if (note
->namesz
== 6
7058 && strcmp (note
->namedata
, "LINUX") == 0)
7059 return elfcore_grok_prxfpreg (abfd
, note
);
7065 if (bed
->elf_backend_grok_psinfo
)
7066 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7068 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7069 return elfcore_grok_psinfo (abfd
, note
);
7076 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7080 sect
->size
= note
->descsz
;
7081 sect
->filepos
= note
->descpos
;
7082 sect
->flags
= SEC_HAS_CONTENTS
;
7083 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7091 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7095 cp
= strchr (note
->namedata
, '@');
7098 *lwpidp
= atoi(cp
+ 1);
7105 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7108 /* Signal number at offset 0x08. */
7109 elf_tdata (abfd
)->core_signal
7110 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7112 /* Process ID at offset 0x50. */
7113 elf_tdata (abfd
)->core_pid
7114 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7116 /* Command name at 0x7c (max 32 bytes, including nul). */
7117 elf_tdata (abfd
)->core_command
7118 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7120 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7125 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7129 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7130 elf_tdata (abfd
)->core_lwpid
= lwp
;
7132 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7134 /* NetBSD-specific core "procinfo". Note that we expect to
7135 find this note before any of the others, which is fine,
7136 since the kernel writes this note out first when it
7137 creates a core file. */
7139 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7142 /* As of Jan 2002 there are no other machine-independent notes
7143 defined for NetBSD core files. If the note type is less
7144 than the start of the machine-dependent note types, we don't
7147 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7151 switch (bfd_get_arch (abfd
))
7153 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7154 PT_GETFPREGS == mach+2. */
7156 case bfd_arch_alpha
:
7157 case bfd_arch_sparc
:
7160 case NT_NETBSDCORE_FIRSTMACH
+0:
7161 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7163 case NT_NETBSDCORE_FIRSTMACH
+2:
7164 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7170 /* On all other arch's, PT_GETREGS == mach+1 and
7171 PT_GETFPREGS == mach+3. */
7176 case NT_NETBSDCORE_FIRSTMACH
+1:
7177 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7179 case NT_NETBSDCORE_FIRSTMACH
+3:
7180 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7190 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7192 void *ddata
= note
->descdata
;
7199 /* nto_procfs_status 'pid' field is at offset 0. */
7200 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7202 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7203 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7205 /* nto_procfs_status 'flags' field is at offset 8. */
7206 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7208 /* nto_procfs_status 'what' field is at offset 14. */
7209 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7211 elf_tdata (abfd
)->core_signal
= sig
;
7212 elf_tdata (abfd
)->core_lwpid
= *tid
;
7215 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7216 do not come from signals so we make sure we set the current
7217 thread just in case. */
7218 if (flags
& 0x00000080)
7219 elf_tdata (abfd
)->core_lwpid
= *tid
;
7221 /* Make a ".qnx_core_status/%d" section. */
7222 sprintf (buf
, ".qnx_core_status/%d", *tid
);
7224 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7229 sect
= bfd_make_section_anyway (abfd
, name
);
7233 sect
->size
= note
->descsz
;
7234 sect
->filepos
= note
->descpos
;
7235 sect
->flags
= SEC_HAS_CONTENTS
;
7236 sect
->alignment_power
= 2;
7238 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7242 elfcore_grok_nto_gregs (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t tid
)
7248 /* Make a ".reg/%d" section. */
7249 sprintf (buf
, ".reg/%d", tid
);
7251 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7256 sect
= bfd_make_section_anyway (abfd
, name
);
7260 sect
->size
= note
->descsz
;
7261 sect
->filepos
= note
->descpos
;
7262 sect
->flags
= SEC_HAS_CONTENTS
;
7263 sect
->alignment_power
= 2;
7265 /* This is the current thread. */
7266 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7267 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7272 #define BFD_QNT_CORE_INFO 7
7273 #define BFD_QNT_CORE_STATUS 8
7274 #define BFD_QNT_CORE_GREG 9
7275 #define BFD_QNT_CORE_FPREG 10
7278 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7280 /* Every GREG section has a STATUS section before it. Store the
7281 tid from the previous call to pass down to the next gregs
7283 static pid_t tid
= 1;
7287 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7288 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7289 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7290 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7291 default: return TRUE
;
7295 /* Function: elfcore_write_note
7302 size of data for note
7305 End of buffer containing note. */
7308 elfcore_write_note (bfd
*abfd
,
7316 Elf_External_Note
*xnp
;
7326 const struct elf_backend_data
*bed
;
7328 namesz
= strlen (name
) + 1;
7329 bed
= get_elf_backend_data (abfd
);
7330 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7333 newspace
= 12 + namesz
+ pad
+ size
;
7335 p
= realloc (buf
, *bufsiz
+ newspace
);
7337 *bufsiz
+= newspace
;
7338 xnp
= (Elf_External_Note
*) dest
;
7339 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7340 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7341 H_PUT_32 (abfd
, type
, xnp
->type
);
7345 memcpy (dest
, name
, namesz
);
7353 memcpy (dest
, input
, size
);
7357 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7359 elfcore_write_prpsinfo (bfd
*abfd
,
7366 char *note_name
= "CORE";
7368 #if defined (HAVE_PSINFO_T)
7370 note_type
= NT_PSINFO
;
7373 note_type
= NT_PRPSINFO
;
7376 memset (&data
, 0, sizeof (data
));
7377 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7378 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7379 return elfcore_write_note (abfd
, buf
, bufsiz
,
7380 note_name
, note_type
, &data
, sizeof (data
));
7382 #endif /* PSINFO_T or PRPSINFO_T */
7384 #if defined (HAVE_PRSTATUS_T)
7386 elfcore_write_prstatus (bfd
*abfd
,
7394 char *note_name
= "CORE";
7396 memset (&prstat
, 0, sizeof (prstat
));
7397 prstat
.pr_pid
= pid
;
7398 prstat
.pr_cursig
= cursig
;
7399 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7400 return elfcore_write_note (abfd
, buf
, bufsiz
,
7401 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7403 #endif /* HAVE_PRSTATUS_T */
7405 #if defined (HAVE_LWPSTATUS_T)
7407 elfcore_write_lwpstatus (bfd
*abfd
,
7414 lwpstatus_t lwpstat
;
7415 char *note_name
= "CORE";
7417 memset (&lwpstat
, 0, sizeof (lwpstat
));
7418 lwpstat
.pr_lwpid
= pid
>> 16;
7419 lwpstat
.pr_cursig
= cursig
;
7420 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7421 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7422 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7424 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7425 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7427 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7428 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7431 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7432 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7434 #endif /* HAVE_LWPSTATUS_T */
7436 #if defined (HAVE_PSTATUS_T)
7438 elfcore_write_pstatus (bfd
*abfd
,
7446 char *note_name
= "CORE";
7448 memset (&pstat
, 0, sizeof (pstat
));
7449 pstat
.pr_pid
= pid
& 0xffff;
7450 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7451 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7454 #endif /* HAVE_PSTATUS_T */
7457 elfcore_write_prfpreg (bfd
*abfd
,
7463 char *note_name
= "CORE";
7464 return elfcore_write_note (abfd
, buf
, bufsiz
,
7465 note_name
, NT_FPREGSET
, fpregs
, size
);
7469 elfcore_write_prxfpreg (bfd
*abfd
,
7472 const void *xfpregs
,
7475 char *note_name
= "LINUX";
7476 return elfcore_write_note (abfd
, buf
, bufsiz
,
7477 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7481 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7489 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7492 buf
= bfd_malloc (size
);
7496 if (bfd_bread (buf
, size
, abfd
) != size
)
7504 while (p
< buf
+ size
)
7506 /* FIXME: bad alignment assumption. */
7507 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7508 Elf_Internal_Note in
;
7510 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7512 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7513 in
.namedata
= xnp
->name
;
7515 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7516 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7517 in
.descpos
= offset
+ (in
.descdata
- buf
);
7519 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7521 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7524 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7526 if (! elfcore_grok_nto_note (abfd
, &in
))
7531 if (! elfcore_grok_note (abfd
, &in
))
7535 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7542 /* Providing external access to the ELF program header table. */
7544 /* Return an upper bound on the number of bytes required to store a
7545 copy of ABFD's program header table entries. Return -1 if an error
7546 occurs; bfd_get_error will return an appropriate code. */
7549 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7551 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7553 bfd_set_error (bfd_error_wrong_format
);
7557 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7560 /* Copy ABFD's program header table entries to *PHDRS. The entries
7561 will be stored as an array of Elf_Internal_Phdr structures, as
7562 defined in include/elf/internal.h. To find out how large the
7563 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7565 Return the number of program header table entries read, or -1 if an
7566 error occurs; bfd_get_error will return an appropriate code. */
7569 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7573 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7575 bfd_set_error (bfd_error_wrong_format
);
7579 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7580 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7581 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7587 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7590 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7592 i_ehdrp
= elf_elfheader (abfd
);
7593 if (i_ehdrp
== NULL
)
7594 sprintf_vma (buf
, value
);
7597 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7599 #if BFD_HOST_64BIT_LONG
7600 sprintf (buf
, "%016lx", value
);
7602 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7603 _bfd_int64_low (value
));
7607 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7610 sprintf_vma (buf
, value
);
7615 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7618 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7620 i_ehdrp
= elf_elfheader (abfd
);
7621 if (i_ehdrp
== NULL
)
7622 fprintf_vma ((FILE *) stream
, value
);
7625 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7627 #if BFD_HOST_64BIT_LONG
7628 fprintf ((FILE *) stream
, "%016lx", value
);
7630 fprintf ((FILE *) stream
, "%08lx%08lx",
7631 _bfd_int64_high (value
), _bfd_int64_low (value
));
7635 fprintf ((FILE *) stream
, "%08lx",
7636 (unsigned long) (value
& 0xffffffff));
7639 fprintf_vma ((FILE *) stream
, value
);
7643 enum elf_reloc_type_class
7644 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7646 return reloc_class_normal
;
7649 /* For RELA architectures, return the relocation value for a
7650 relocation against a local symbol. */
7653 _bfd_elf_rela_local_sym (bfd
*abfd
,
7654 Elf_Internal_Sym
*sym
,
7656 Elf_Internal_Rela
*rel
)
7658 asection
*sec
= *psec
;
7661 relocation
= (sec
->output_section
->vma
7662 + sec
->output_offset
7664 if ((sec
->flags
& SEC_MERGE
)
7665 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7666 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7669 _bfd_merged_section_offset (abfd
, psec
,
7670 elf_section_data (sec
)->sec_info
,
7671 sym
->st_value
+ rel
->r_addend
);
7674 /* If we have changed the section, and our original section is
7675 marked with SEC_EXCLUDE, it means that the original
7676 SEC_MERGE section has been completely subsumed in some
7677 other SEC_MERGE section. In this case, we need to leave
7678 some info around for --emit-relocs. */
7679 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7680 sec
->kept_section
= *psec
;
7683 rel
->r_addend
-= relocation
;
7684 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7690 _bfd_elf_rel_local_sym (bfd
*abfd
,
7691 Elf_Internal_Sym
*sym
,
7695 asection
*sec
= *psec
;
7697 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7698 return sym
->st_value
+ addend
;
7700 return _bfd_merged_section_offset (abfd
, psec
,
7701 elf_section_data (sec
)->sec_info
,
7702 sym
->st_value
+ addend
);
7706 _bfd_elf_section_offset (bfd
*abfd
,
7707 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7711 switch (sec
->sec_info_type
)
7713 case ELF_INFO_TYPE_STABS
:
7714 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7716 case ELF_INFO_TYPE_EH_FRAME
:
7717 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);
7723 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7724 reconstruct an ELF file by reading the segments out of remote memory
7725 based on the ELF file header at EHDR_VMA and the ELF program headers it
7726 points to. If not null, *LOADBASEP is filled in with the difference
7727 between the VMAs from which the segments were read, and the VMAs the
7728 file headers (and hence BFD's idea of each section's VMA) put them at.
7730 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7731 remote memory at target address VMA into the local buffer at MYADDR; it
7732 should return zero on success or an `errno' code on failure. TEMPL must
7733 be a BFD for an ELF target with the word size and byte order found in
7734 the remote memory. */
7737 bfd_elf_bfd_from_remote_memory
7741 int (*target_read_memory
) (bfd_vma
, char *, int))
7743 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7744 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7748 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
7749 long symcount ATTRIBUTE_UNUSED
,
7750 asymbol
**syms ATTRIBUTE_UNUSED
,
7751 long dynsymcount ATTRIBUTE_UNUSED
,
7755 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7758 const char *relplt_name
;
7759 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7763 Elf_Internal_Shdr
*hdr
;
7767 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
7771 if (!bed
->plt_sym_val
)
7774 relplt_name
= bed
->relplt_name
;
7775 if (relplt_name
== NULL
)
7776 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7777 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7781 hdr
= &elf_section_data (relplt
)->this_hdr
;
7782 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7783 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7786 plt
= bfd_get_section_by_name (abfd
, ".plt");
7790 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7791 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7794 count
= relplt
->size
/ hdr
->sh_entsize
;
7795 size
= count
* sizeof (asymbol
);
7796 p
= relplt
->relocation
;
7797 for (i
= 0; i
< count
; i
++, s
++, p
++)
7798 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7800 s
= *ret
= bfd_malloc (size
);
7804 names
= (char *) (s
+ count
);
7805 p
= relplt
->relocation
;
7807 for (i
= 0; i
< count
; i
++, s
++, p
++)
7812 addr
= bed
->plt_sym_val (i
, plt
, p
);
7813 if (addr
== (bfd_vma
) -1)
7816 *s
= **p
->sym_ptr_ptr
;
7818 s
->value
= addr
- plt
->vma
;
7820 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7821 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7823 memcpy (names
, "@plt", sizeof ("@plt"));
7824 names
+= sizeof ("@plt");
7831 /* Sort symbol by binding and section. We want to put definitions
7832 sorted by section at the beginning. */
7835 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7837 const Elf_Internal_Sym
*s1
;
7838 const Elf_Internal_Sym
*s2
;
7841 /* Make sure that undefined symbols are at the end. */
7842 s1
= (const Elf_Internal_Sym
*) arg1
;
7843 if (s1
->st_shndx
== SHN_UNDEF
)
7845 s2
= (const Elf_Internal_Sym
*) arg2
;
7846 if (s2
->st_shndx
== SHN_UNDEF
)
7849 /* Sorted by section index. */
7850 shndx
= s1
->st_shndx
- s2
->st_shndx
;
7854 /* Sorted by binding. */
7855 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
7860 Elf_Internal_Sym
*sym
;
7865 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7867 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7868 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7869 return strcmp (s1
->name
, s2
->name
);
7872 /* Check if 2 sections define the same set of local and global
7876 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
7879 const struct elf_backend_data
*bed1
, *bed2
;
7880 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7881 bfd_size_type symcount1
, symcount2
;
7882 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7883 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
7884 Elf_Internal_Sym
*isymend
;
7885 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
7886 bfd_size_type count1
, count2
, i
;
7893 /* If both are .gnu.linkonce sections, they have to have the same
7895 if (strncmp (sec1
->name
, ".gnu.linkonce",
7896 sizeof ".gnu.linkonce" - 1) == 0
7897 && strncmp (sec2
->name
, ".gnu.linkonce",
7898 sizeof ".gnu.linkonce" - 1) == 0)
7899 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
7900 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
7902 /* Both sections have to be in ELF. */
7903 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7904 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7907 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7910 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
7911 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
7913 /* If both are members of section groups, they have to have the
7915 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
7919 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7920 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7921 if (shndx1
== -1 || shndx2
== -1)
7924 bed1
= get_elf_backend_data (bfd1
);
7925 bed2
= get_elf_backend_data (bfd2
);
7926 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7927 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7928 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7929 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7931 if (symcount1
== 0 || symcount2
== 0)
7934 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7936 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7940 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
7943 /* Sort symbols by binding and section. Global definitions are at
7945 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
7946 elf_sort_elf_symbol
);
7947 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
7948 elf_sort_elf_symbol
);
7950 /* Count definitions in the section. */
7952 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
7953 isym
< isymend
; isym
++)
7955 if (isym
->st_shndx
== (unsigned int) shndx1
)
7962 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
7967 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
7968 isym
< isymend
; isym
++)
7970 if (isym
->st_shndx
== (unsigned int) shndx2
)
7977 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
7981 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7984 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
7985 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
7987 if (symtable1
== NULL
|| symtable2
== NULL
)
7991 for (isym
= isymstart1
, isymend
= isym
+ count1
;
7992 isym
< isymend
; isym
++)
7995 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8002 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8003 isym
< isymend
; isym
++)
8006 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8012 /* Sort symbol by name. */
8013 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8014 elf_sym_name_compare
);
8015 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8016 elf_sym_name_compare
);
8018 for (i
= 0; i
< count1
; i
++)
8019 /* Two symbols must have the same binding, type and name. */
8020 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8021 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8022 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)