1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005 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 bfd_byte
*shstrtab
= NULL
;
258 bfd_size_type shstrtabsize
;
260 i_shdrp
= elf_elfsections (abfd
);
261 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
264 shstrtab
= 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
;
273 return (char *) 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 unsigned int shstrndx
= elf_elfheader(abfd
)->e_shstrndx
;
295 (*_bfd_error_handler
)
296 (_("%B: invalid string offset %u >= %lu for section `%s'"),
297 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
298 (shindex
== shstrndx
&& strindex
== hdr
->sh_name
300 : bfd_elf_string_from_elf_section (abfd
, shstrndx
, 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_sym_name (bfd
*abfd
,
409 Elf_Internal_Shdr
*symtab_hdr
,
410 Elf_Internal_Sym
*isym
,
414 unsigned int iname
= isym
->st_name
;
415 unsigned int shindex
= symtab_hdr
->sh_link
;
417 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
418 /* Check for a bogus st_shndx to avoid crashing. */
419 && isym
->st_shndx
< elf_numsections (abfd
)
420 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
422 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
423 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
426 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
429 else if (sym_sec
&& *name
== '\0')
430 name
= bfd_section_name (abfd
, sym_sec
);
435 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
436 sections. The first element is the flags, the rest are section
439 typedef union elf_internal_group
{
440 Elf_Internal_Shdr
*shdr
;
442 } Elf_Internal_Group
;
444 /* Return the name of the group signature symbol. Why isn't the
445 signature just a string? */
448 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
450 Elf_Internal_Shdr
*hdr
;
451 unsigned char esym
[sizeof (Elf64_External_Sym
)];
452 Elf_External_Sym_Shndx eshndx
;
453 Elf_Internal_Sym isym
;
455 /* First we need to ensure the symbol table is available. */
456 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
459 /* Go read the symbol. */
460 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
461 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
462 &isym
, esym
, &eshndx
) == NULL
)
465 return bfd_elf_sym_name (abfd
, hdr
, &isym
, NULL
);
468 /* Set next_in_group list pointer, and group name for NEWSECT. */
471 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
473 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
475 /* If num_group is zero, read in all SHT_GROUP sections. The count
476 is set to -1 if there are no SHT_GROUP sections. */
479 unsigned int i
, shnum
;
481 /* First count the number of groups. If we have a SHT_GROUP
482 section with just a flag word (ie. sh_size is 4), ignore it. */
483 shnum
= elf_numsections (abfd
);
485 for (i
= 0; i
< shnum
; i
++)
487 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
488 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
494 num_group
= (unsigned) -1;
495 elf_tdata (abfd
)->num_group
= num_group
;
499 /* We keep a list of elf section headers for group sections,
500 so we can find them quickly. */
503 elf_tdata (abfd
)->num_group
= num_group
;
504 amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
505 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
506 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
510 for (i
= 0; i
< shnum
; i
++)
512 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
513 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
516 Elf_Internal_Group
*dest
;
518 /* Add to list of sections. */
519 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
522 /* Read the raw contents. */
523 BFD_ASSERT (sizeof (*dest
) >= 4);
524 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
525 shdr
->contents
= bfd_alloc (abfd
, amt
);
526 if (shdr
->contents
== NULL
527 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
528 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
532 /* Translate raw contents, a flag word followed by an
533 array of elf section indices all in target byte order,
534 to the flag word followed by an array of elf section
536 src
= shdr
->contents
+ shdr
->sh_size
;
537 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
544 idx
= H_GET_32 (abfd
, src
);
545 if (src
== shdr
->contents
)
548 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
549 shdr
->bfd_section
->flags
550 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
555 ((*_bfd_error_handler
)
556 (_("%B: invalid SHT_GROUP entry"), abfd
));
559 dest
->shdr
= elf_elfsections (abfd
)[idx
];
566 if (num_group
!= (unsigned) -1)
570 for (i
= 0; i
< num_group
; i
++)
572 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
573 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
574 unsigned int n_elt
= shdr
->sh_size
/ 4;
576 /* Look through this group's sections to see if current
577 section is a member. */
579 if ((++idx
)->shdr
== hdr
)
583 /* We are a member of this group. Go looking through
584 other members to see if any others are linked via
586 idx
= (Elf_Internal_Group
*) shdr
->contents
;
587 n_elt
= shdr
->sh_size
/ 4;
589 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
590 && elf_next_in_group (s
) != NULL
)
594 /* Snarf the group name from other member, and
595 insert current section in circular list. */
596 elf_group_name (newsect
) = elf_group_name (s
);
597 elf_next_in_group (newsect
) = elf_next_in_group (s
);
598 elf_next_in_group (s
) = newsect
;
604 gname
= group_signature (abfd
, shdr
);
607 elf_group_name (newsect
) = gname
;
609 /* Start a circular list with one element. */
610 elf_next_in_group (newsect
) = newsect
;
613 /* If the group section has been created, point to the
615 if (shdr
->bfd_section
!= NULL
)
616 elf_next_in_group (shdr
->bfd_section
) = newsect
;
624 if (elf_group_name (newsect
) == NULL
)
626 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
633 _bfd_elf_setup_group_pointers (bfd
*abfd
)
636 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
637 bfd_boolean result
= TRUE
;
639 if (num_group
== (unsigned) -1)
642 for (i
= 0; i
< num_group
; i
++)
644 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
645 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
646 unsigned int n_elt
= shdr
->sh_size
/ 4;
649 if ((++idx
)->shdr
->bfd_section
)
650 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
651 else if (idx
->shdr
->sh_type
== SHT_RELA
652 || idx
->shdr
->sh_type
== SHT_REL
)
653 /* We won't include relocation sections in section groups in
654 output object files. We adjust the group section size here
655 so that relocatable link will work correctly when
656 relocation sections are in section group in input object
658 shdr
->bfd_section
->size
-= 4;
661 /* There are some unknown sections in the group. */
662 (*_bfd_error_handler
)
663 (_("%B: unknown [%d] section `%s' in group [%s]"),
665 (unsigned int) idx
->shdr
->sh_type
,
666 bfd_elf_string_from_elf_section (abfd
,
667 (elf_elfheader (abfd
)
670 shdr
->bfd_section
->name
);
678 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
680 return elf_next_in_group (sec
) != NULL
;
683 /* Make a BFD section from an ELF section. We store a pointer to the
684 BFD section in the bfd_section field of the header. */
687 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
688 Elf_Internal_Shdr
*hdr
,
694 const struct elf_backend_data
*bed
;
696 if (hdr
->bfd_section
!= NULL
)
698 BFD_ASSERT (strcmp (name
,
699 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
703 newsect
= bfd_make_section_anyway (abfd
, name
);
707 hdr
->bfd_section
= newsect
;
708 elf_section_data (newsect
)->this_hdr
= *hdr
;
709 elf_section_data (newsect
)->this_idx
= shindex
;
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
, FALSE
))
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
->got
= ret
->plt
= htab
->init_refcount
;
1395 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1396 - offsetof (struct elf_link_hash_entry
, size
)));
1397 /* Assume that we have been called by a non-ELF symbol reader.
1398 This flag is then reset by the code which reads an ELF input
1399 file. This ensures that a symbol created by a non-ELF symbol
1400 reader will have the flag set correctly. */
1407 /* Copy data from an indirect symbol to its direct symbol, hiding the
1408 old indirect symbol. Also used for copying flags to a weakdef. */
1411 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1412 struct elf_link_hash_entry
*dir
,
1413 struct elf_link_hash_entry
*ind
)
1416 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1418 /* Copy down any references that we may have already seen to the
1419 symbol which just became indirect. */
1421 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1422 dir
->ref_regular
|= ind
->ref_regular
;
1423 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1424 dir
->non_got_ref
|= ind
->non_got_ref
;
1425 dir
->needs_plt
|= ind
->needs_plt
;
1426 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1428 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1431 /* Copy over the global and procedure linkage table refcount entries.
1432 These may have been already set up by a check_relocs routine. */
1433 tmp
= dir
->got
.refcount
;
1434 if (tmp
< lowest_valid
)
1436 dir
->got
.refcount
= ind
->got
.refcount
;
1437 ind
->got
.refcount
= tmp
;
1440 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1442 tmp
= dir
->plt
.refcount
;
1443 if (tmp
< lowest_valid
)
1445 dir
->plt
.refcount
= ind
->plt
.refcount
;
1446 ind
->plt
.refcount
= tmp
;
1449 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1451 if (dir
->dynindx
== -1)
1453 dir
->dynindx
= ind
->dynindx
;
1454 dir
->dynstr_index
= ind
->dynstr_index
;
1456 ind
->dynstr_index
= 0;
1459 BFD_ASSERT (ind
->dynindx
== -1);
1463 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1464 struct elf_link_hash_entry
*h
,
1465 bfd_boolean force_local
)
1467 h
->plt
= elf_hash_table (info
)->init_offset
;
1471 h
->forced_local
= 1;
1472 if (h
->dynindx
!= -1)
1475 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1481 /* Initialize an ELF linker hash table. */
1484 _bfd_elf_link_hash_table_init
1485 (struct elf_link_hash_table
*table
,
1487 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1488 struct bfd_hash_table
*,
1493 table
->dynamic_sections_created
= FALSE
;
1494 table
->dynobj
= NULL
;
1495 /* Make sure can_refcount is extended to the width and signedness of
1496 init_refcount before we subtract one from it. */
1497 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1498 table
->init_refcount
.refcount
-= 1;
1499 table
->init_offset
.offset
= -(bfd_vma
) 1;
1500 /* The first dynamic symbol is a dummy. */
1501 table
->dynsymcount
= 1;
1502 table
->dynstr
= NULL
;
1503 table
->bucketcount
= 0;
1504 table
->needed
= NULL
;
1506 table
->merge_info
= NULL
;
1507 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1508 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1509 table
->dynlocal
= NULL
;
1510 table
->runpath
= NULL
;
1511 table
->tls_sec
= NULL
;
1512 table
->tls_size
= 0;
1513 table
->loaded
= NULL
;
1514 table
->is_relocatable_executable
= FALSE
;
1516 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1517 table
->root
.type
= bfd_link_elf_hash_table
;
1522 /* Create an ELF linker hash table. */
1524 struct bfd_link_hash_table
*
1525 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1527 struct elf_link_hash_table
*ret
;
1528 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1530 ret
= bfd_malloc (amt
);
1534 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1543 /* This is a hook for the ELF emulation code in the generic linker to
1544 tell the backend linker what file name to use for the DT_NEEDED
1545 entry for a dynamic object. */
1548 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1550 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1551 && bfd_get_format (abfd
) == bfd_object
)
1552 elf_dt_name (abfd
) = name
;
1556 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1559 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1560 && bfd_get_format (abfd
) == bfd_object
)
1561 lib_class
= elf_dyn_lib_class (abfd
);
1568 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1570 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1571 && bfd_get_format (abfd
) == bfd_object
)
1572 elf_dyn_lib_class (abfd
) = lib_class
;
1575 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1576 the linker ELF emulation code. */
1578 struct bfd_link_needed_list
*
1579 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1580 struct bfd_link_info
*info
)
1582 if (! is_elf_hash_table (info
->hash
))
1584 return elf_hash_table (info
)->needed
;
1587 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1588 hook for the linker ELF emulation code. */
1590 struct bfd_link_needed_list
*
1591 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1592 struct bfd_link_info
*info
)
1594 if (! is_elf_hash_table (info
->hash
))
1596 return elf_hash_table (info
)->runpath
;
1599 /* Get the name actually used for a dynamic object for a link. This
1600 is the SONAME entry if there is one. Otherwise, it is the string
1601 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1604 bfd_elf_get_dt_soname (bfd
*abfd
)
1606 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1607 && bfd_get_format (abfd
) == bfd_object
)
1608 return elf_dt_name (abfd
);
1612 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1613 the ELF linker emulation code. */
1616 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1617 struct bfd_link_needed_list
**pneeded
)
1620 bfd_byte
*dynbuf
= NULL
;
1622 unsigned long shlink
;
1623 bfd_byte
*extdyn
, *extdynend
;
1625 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1629 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1630 || bfd_get_format (abfd
) != bfd_object
)
1633 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1634 if (s
== NULL
|| s
->size
== 0)
1637 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1640 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1644 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1646 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1647 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1650 extdynend
= extdyn
+ s
->size
;
1651 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1653 Elf_Internal_Dyn dyn
;
1655 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1657 if (dyn
.d_tag
== DT_NULL
)
1660 if (dyn
.d_tag
== DT_NEEDED
)
1663 struct bfd_link_needed_list
*l
;
1664 unsigned int tagv
= dyn
.d_un
.d_val
;
1667 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1672 l
= bfd_alloc (abfd
, amt
);
1693 /* Allocate an ELF string table--force the first byte to be zero. */
1695 struct bfd_strtab_hash
*
1696 _bfd_elf_stringtab_init (void)
1698 struct bfd_strtab_hash
*ret
;
1700 ret
= _bfd_stringtab_init ();
1705 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1706 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1707 if (loc
== (bfd_size_type
) -1)
1709 _bfd_stringtab_free (ret
);
1716 /* ELF .o/exec file reading */
1718 /* Create a new bfd section from an ELF section header. */
1721 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1723 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1724 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1725 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1728 name
= bfd_elf_string_from_elf_section (abfd
,
1729 elf_elfheader (abfd
)->e_shstrndx
,
1732 switch (hdr
->sh_type
)
1735 /* Inactive section. Throw it away. */
1738 case SHT_PROGBITS
: /* Normal section with contents. */
1739 case SHT_NOBITS
: /* .bss section. */
1740 case SHT_HASH
: /* .hash section. */
1741 case SHT_NOTE
: /* .note section. */
1742 case SHT_INIT_ARRAY
: /* .init_array section. */
1743 case SHT_FINI_ARRAY
: /* .fini_array section. */
1744 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1745 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1746 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1748 case SHT_DYNAMIC
: /* Dynamic linking information. */
1749 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1751 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1753 Elf_Internal_Shdr
*dynsymhdr
;
1755 /* The shared libraries distributed with hpux11 have a bogus
1756 sh_link field for the ".dynamic" section. Find the
1757 string table for the ".dynsym" section instead. */
1758 if (elf_dynsymtab (abfd
) != 0)
1760 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1761 hdr
->sh_link
= dynsymhdr
->sh_link
;
1765 unsigned int i
, num_sec
;
1767 num_sec
= elf_numsections (abfd
);
1768 for (i
= 1; i
< num_sec
; i
++)
1770 dynsymhdr
= elf_elfsections (abfd
)[i
];
1771 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1773 hdr
->sh_link
= dynsymhdr
->sh_link
;
1781 case SHT_SYMTAB
: /* A symbol table */
1782 if (elf_onesymtab (abfd
) == shindex
)
1785 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1786 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1787 elf_onesymtab (abfd
) = shindex
;
1788 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1789 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1790 abfd
->flags
|= HAS_SYMS
;
1792 /* Sometimes a shared object will map in the symbol table. If
1793 SHF_ALLOC is set, and this is a shared object, then we also
1794 treat this section as a BFD section. We can not base the
1795 decision purely on SHF_ALLOC, because that flag is sometimes
1796 set in a relocatable object file, which would confuse the
1798 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1799 && (abfd
->flags
& DYNAMIC
) != 0
1800 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1804 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1805 can't read symbols without that section loaded as well. It
1806 is most likely specified by the next section header. */
1807 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1809 unsigned int i
, num_sec
;
1811 num_sec
= elf_numsections (abfd
);
1812 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1814 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1815 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1816 && hdr2
->sh_link
== shindex
)
1820 for (i
= 1; i
< shindex
; i
++)
1822 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1823 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1824 && hdr2
->sh_link
== shindex
)
1828 return bfd_section_from_shdr (abfd
, i
);
1832 case SHT_DYNSYM
: /* A dynamic symbol table */
1833 if (elf_dynsymtab (abfd
) == shindex
)
1836 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1837 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1838 elf_dynsymtab (abfd
) = shindex
;
1839 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1840 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1841 abfd
->flags
|= HAS_SYMS
;
1843 /* Besides being a symbol table, we also treat this as a regular
1844 section, so that objcopy can handle it. */
1845 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1847 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1848 if (elf_symtab_shndx (abfd
) == shindex
)
1851 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1852 elf_symtab_shndx (abfd
) = shindex
;
1853 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1854 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1857 case SHT_STRTAB
: /* A string table */
1858 if (hdr
->bfd_section
!= NULL
)
1860 if (ehdr
->e_shstrndx
== shindex
)
1862 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1863 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1866 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1869 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1870 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1873 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1876 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1877 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1878 elf_elfsections (abfd
)[shindex
] = hdr
;
1879 /* We also treat this as a regular section, so that objcopy
1881 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1885 /* If the string table isn't one of the above, then treat it as a
1886 regular section. We need to scan all the headers to be sure,
1887 just in case this strtab section appeared before the above. */
1888 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1890 unsigned int i
, num_sec
;
1892 num_sec
= elf_numsections (abfd
);
1893 for (i
= 1; i
< num_sec
; i
++)
1895 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1896 if (hdr2
->sh_link
== shindex
)
1898 if (! bfd_section_from_shdr (abfd
, i
))
1900 if (elf_onesymtab (abfd
) == i
)
1902 if (elf_dynsymtab (abfd
) == i
)
1903 goto dynsymtab_strtab
;
1907 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1911 /* *These* do a lot of work -- but build no sections! */
1913 asection
*target_sect
;
1914 Elf_Internal_Shdr
*hdr2
;
1915 unsigned int num_sec
= elf_numsections (abfd
);
1917 /* Check for a bogus link to avoid crashing. */
1918 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1919 || hdr
->sh_link
>= num_sec
)
1921 ((*_bfd_error_handler
)
1922 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1923 abfd
, hdr
->sh_link
, name
, shindex
));
1924 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1928 /* For some incomprehensible reason Oracle distributes
1929 libraries for Solaris in which some of the objects have
1930 bogus sh_link fields. It would be nice if we could just
1931 reject them, but, unfortunately, some people need to use
1932 them. We scan through the section headers; if we find only
1933 one suitable symbol table, we clobber the sh_link to point
1934 to it. I hope this doesn't break anything. */
1935 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1936 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1942 for (scan
= 1; scan
< num_sec
; scan
++)
1944 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1945 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1956 hdr
->sh_link
= found
;
1959 /* Get the symbol table. */
1960 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1961 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1962 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1965 /* If this reloc section does not use the main symbol table we
1966 don't treat it as a reloc section. BFD can't adequately
1967 represent such a section, so at least for now, we don't
1968 try. We just present it as a normal section. We also
1969 can't use it as a reloc section if it points to the null
1971 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1972 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1975 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1977 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1978 if (target_sect
== NULL
)
1981 if ((target_sect
->flags
& SEC_RELOC
) == 0
1982 || target_sect
->reloc_count
== 0)
1983 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1987 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1988 amt
= sizeof (*hdr2
);
1989 hdr2
= bfd_alloc (abfd
, amt
);
1990 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1993 elf_elfsections (abfd
)[shindex
] = hdr2
;
1994 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1995 target_sect
->flags
|= SEC_RELOC
;
1996 target_sect
->relocation
= NULL
;
1997 target_sect
->rel_filepos
= hdr
->sh_offset
;
1998 /* In the section to which the relocations apply, mark whether
1999 its relocations are of the REL or RELA variety. */
2000 if (hdr
->sh_size
!= 0)
2001 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2002 abfd
->flags
|= HAS_RELOC
;
2007 case SHT_GNU_verdef
:
2008 elf_dynverdef (abfd
) = shindex
;
2009 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2010 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2013 case SHT_GNU_versym
:
2014 elf_dynversym (abfd
) = shindex
;
2015 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2016 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2019 case SHT_GNU_verneed
:
2020 elf_dynverref (abfd
) = shindex
;
2021 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2022 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2029 /* We need a BFD section for objcopy and relocatable linking,
2030 and it's handy to have the signature available as the section
2032 name
= group_signature (abfd
, hdr
);
2035 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2037 if (hdr
->contents
!= NULL
)
2039 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2040 unsigned int n_elt
= hdr
->sh_size
/ 4;
2043 if (idx
->flags
& GRP_COMDAT
)
2044 hdr
->bfd_section
->flags
2045 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2047 /* We try to keep the same section order as it comes in. */
2049 while (--n_elt
!= 0)
2050 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2051 && elf_next_in_group (s
) != NULL
)
2053 elf_next_in_group (hdr
->bfd_section
) = s
;
2060 /* Check for any processor-specific section types. */
2061 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2068 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2069 Return SEC for sections that have no elf section, and NULL on error. */
2072 bfd_section_from_r_symndx (bfd
*abfd
,
2073 struct sym_sec_cache
*cache
,
2075 unsigned long r_symndx
)
2077 Elf_Internal_Shdr
*symtab_hdr
;
2078 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2079 Elf_External_Sym_Shndx eshndx
;
2080 Elf_Internal_Sym isym
;
2081 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2083 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2084 return cache
->sec
[ent
];
2086 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2087 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2088 &isym
, esym
, &eshndx
) == NULL
)
2091 if (cache
->abfd
!= abfd
)
2093 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2096 cache
->indx
[ent
] = r_symndx
;
2097 cache
->sec
[ent
] = sec
;
2098 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2099 || isym
.st_shndx
> SHN_HIRESERVE
)
2102 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2104 cache
->sec
[ent
] = s
;
2106 return cache
->sec
[ent
];
2109 /* Given an ELF section number, retrieve the corresponding BFD
2113 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2115 if (index
>= elf_numsections (abfd
))
2117 return elf_elfsections (abfd
)[index
]->bfd_section
;
2120 static struct bfd_elf_special_section
const special_sections
[] =
2122 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2123 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2124 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2125 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2126 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2127 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2128 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2129 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2130 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2131 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2132 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2133 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2134 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2135 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2136 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2137 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2138 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2139 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2140 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2141 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2142 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2143 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2144 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2145 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2146 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2147 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2148 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2149 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2150 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2151 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2152 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2153 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2154 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2155 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2156 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2157 { ".note", 5, -1, SHT_NOTE
, 0 },
2158 { ".rela", 5, -1, SHT_RELA
, 0 },
2159 { ".rel", 4, -1, SHT_REL
, 0 },
2160 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2161 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2162 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2163 { NULL
, 0, 0, 0, 0 }
2166 static const struct bfd_elf_special_section
*
2167 get_special_section (const char *name
,
2168 const struct bfd_elf_special_section
*special_sections
,
2172 int len
= strlen (name
);
2174 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2177 int prefix_len
= special_sections
[i
].prefix_length
;
2179 if (len
< prefix_len
)
2181 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2184 suffix_len
= special_sections
[i
].suffix_length
;
2185 if (suffix_len
<= 0)
2187 if (name
[prefix_len
] != 0)
2189 if (suffix_len
== 0)
2191 if (name
[prefix_len
] != '.'
2192 && (suffix_len
== -2
2193 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2199 if (len
< prefix_len
+ suffix_len
)
2201 if (memcmp (name
+ len
- suffix_len
,
2202 special_sections
[i
].prefix
+ prefix_len
,
2206 return &special_sections
[i
];
2212 const struct bfd_elf_special_section
*
2213 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2215 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2216 const struct bfd_elf_special_section
*ssect
= NULL
;
2218 /* See if this is one of the special sections. */
2221 unsigned int rela
= bed
->default_use_rela_p
;
2223 if (bed
->special_sections
)
2224 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2227 ssect
= get_special_section (name
, special_sections
, rela
);
2234 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2236 struct bfd_elf_section_data
*sdata
;
2237 const struct bfd_elf_special_section
*ssect
;
2239 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2242 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2245 sec
->used_by_bfd
= sdata
;
2248 /* When we read a file, we don't need section type and flags.
2249 They will be overridden in _bfd_elf_make_section_from_shdr
2251 if (abfd
->direction
!= read_direction
)
2253 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2256 elf_section_type (sec
) = ssect
->type
;
2257 elf_section_flags (sec
) = ssect
->attr
;
2261 /* Indicate whether or not this section should use RELA relocations. */
2262 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2267 /* Create a new bfd section from an ELF program header.
2269 Since program segments have no names, we generate a synthetic name
2270 of the form segment<NUM>, where NUM is generally the index in the
2271 program header table. For segments that are split (see below) we
2272 generate the names segment<NUM>a and segment<NUM>b.
2274 Note that some program segments may have a file size that is different than
2275 (less than) the memory size. All this means is that at execution the
2276 system must allocate the amount of memory specified by the memory size,
2277 but only initialize it with the first "file size" bytes read from the
2278 file. This would occur for example, with program segments consisting
2279 of combined data+bss.
2281 To handle the above situation, this routine generates TWO bfd sections
2282 for the single program segment. The first has the length specified by
2283 the file size of the segment, and the second has the length specified
2284 by the difference between the two sizes. In effect, the segment is split
2285 into it's initialized and uninitialized parts.
2290 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2291 Elf_Internal_Phdr
*hdr
,
2293 const char *typename
)
2301 split
= ((hdr
->p_memsz
> 0)
2302 && (hdr
->p_filesz
> 0)
2303 && (hdr
->p_memsz
> hdr
->p_filesz
));
2304 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2305 len
= strlen (namebuf
) + 1;
2306 name
= bfd_alloc (abfd
, len
);
2309 memcpy (name
, namebuf
, len
);
2310 newsect
= bfd_make_section (abfd
, name
);
2311 if (newsect
== NULL
)
2313 newsect
->vma
= hdr
->p_vaddr
;
2314 newsect
->lma
= hdr
->p_paddr
;
2315 newsect
->size
= hdr
->p_filesz
;
2316 newsect
->filepos
= hdr
->p_offset
;
2317 newsect
->flags
|= SEC_HAS_CONTENTS
;
2318 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2319 if (hdr
->p_type
== PT_LOAD
)
2321 newsect
->flags
|= SEC_ALLOC
;
2322 newsect
->flags
|= SEC_LOAD
;
2323 if (hdr
->p_flags
& PF_X
)
2325 /* FIXME: all we known is that it has execute PERMISSION,
2327 newsect
->flags
|= SEC_CODE
;
2330 if (!(hdr
->p_flags
& PF_W
))
2332 newsect
->flags
|= SEC_READONLY
;
2337 sprintf (namebuf
, "%s%db", typename
, index
);
2338 len
= strlen (namebuf
) + 1;
2339 name
= bfd_alloc (abfd
, len
);
2342 memcpy (name
, namebuf
, len
);
2343 newsect
= bfd_make_section (abfd
, name
);
2344 if (newsect
== NULL
)
2346 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2347 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2348 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2349 if (hdr
->p_type
== PT_LOAD
)
2351 newsect
->flags
|= SEC_ALLOC
;
2352 if (hdr
->p_flags
& PF_X
)
2353 newsect
->flags
|= SEC_CODE
;
2355 if (!(hdr
->p_flags
& PF_W
))
2356 newsect
->flags
|= SEC_READONLY
;
2363 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2365 const struct elf_backend_data
*bed
;
2367 switch (hdr
->p_type
)
2370 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2373 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2376 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2379 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2382 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2384 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2389 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2392 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2394 case PT_GNU_EH_FRAME
:
2395 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2399 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2402 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2405 /* Check for any processor-specific program segment types. */
2406 bed
= get_elf_backend_data (abfd
);
2407 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2411 /* Initialize REL_HDR, the section-header for new section, containing
2412 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2413 relocations; otherwise, we use REL relocations. */
2416 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2417 Elf_Internal_Shdr
*rel_hdr
,
2419 bfd_boolean use_rela_p
)
2422 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2423 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2425 name
= bfd_alloc (abfd
, amt
);
2428 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2430 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2432 if (rel_hdr
->sh_name
== (unsigned int) -1)
2434 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2435 rel_hdr
->sh_entsize
= (use_rela_p
2436 ? bed
->s
->sizeof_rela
2437 : bed
->s
->sizeof_rel
);
2438 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2439 rel_hdr
->sh_flags
= 0;
2440 rel_hdr
->sh_addr
= 0;
2441 rel_hdr
->sh_size
= 0;
2442 rel_hdr
->sh_offset
= 0;
2447 /* Set up an ELF internal section header for a section. */
2450 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2452 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2453 bfd_boolean
*failedptr
= failedptrarg
;
2454 Elf_Internal_Shdr
*this_hdr
;
2458 /* We already failed; just get out of the bfd_map_over_sections
2463 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2465 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2466 asect
->name
, FALSE
);
2467 if (this_hdr
->sh_name
== (unsigned int) -1)
2473 this_hdr
->sh_flags
= 0;
2475 if ((asect
->flags
& SEC_ALLOC
) != 0
2476 || asect
->user_set_vma
)
2477 this_hdr
->sh_addr
= asect
->vma
;
2479 this_hdr
->sh_addr
= 0;
2481 this_hdr
->sh_offset
= 0;
2482 this_hdr
->sh_size
= asect
->size
;
2483 this_hdr
->sh_link
= 0;
2484 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2485 /* The sh_entsize and sh_info fields may have been set already by
2486 copy_private_section_data. */
2488 this_hdr
->bfd_section
= asect
;
2489 this_hdr
->contents
= NULL
;
2491 /* If the section type is unspecified, we set it based on
2493 if (this_hdr
->sh_type
== SHT_NULL
)
2495 if ((asect
->flags
& SEC_GROUP
) != 0)
2497 /* We also need to mark SHF_GROUP here for relocatable
2499 struct bfd_link_order
*l
;
2502 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2503 if (l
->type
== bfd_indirect_link_order
2504 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2507 /* The name is not important. Anything will do. */
2508 elf_group_name (elt
->output_section
) = "G";
2509 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2511 elt
= elf_next_in_group (elt
);
2512 /* During a relocatable link, the lists are
2515 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2517 this_hdr
->sh_type
= SHT_GROUP
;
2519 else if ((asect
->flags
& SEC_ALLOC
) != 0
2520 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2521 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2522 this_hdr
->sh_type
= SHT_NOBITS
;
2524 this_hdr
->sh_type
= SHT_PROGBITS
;
2527 switch (this_hdr
->sh_type
)
2533 case SHT_INIT_ARRAY
:
2534 case SHT_FINI_ARRAY
:
2535 case SHT_PREINIT_ARRAY
:
2542 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2546 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2550 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2554 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2555 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2559 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2560 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2563 case SHT_GNU_versym
:
2564 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2567 case SHT_GNU_verdef
:
2568 this_hdr
->sh_entsize
= 0;
2569 /* objcopy or strip will copy over sh_info, but may not set
2570 cverdefs. The linker will set cverdefs, but sh_info will be
2572 if (this_hdr
->sh_info
== 0)
2573 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2575 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2576 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2579 case SHT_GNU_verneed
:
2580 this_hdr
->sh_entsize
= 0;
2581 /* objcopy or strip will copy over sh_info, but may not set
2582 cverrefs. The linker will set cverrefs, but sh_info will be
2584 if (this_hdr
->sh_info
== 0)
2585 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2587 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2588 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2592 this_hdr
->sh_entsize
= 4;
2596 if ((asect
->flags
& SEC_ALLOC
) != 0)
2597 this_hdr
->sh_flags
|= SHF_ALLOC
;
2598 if ((asect
->flags
& SEC_READONLY
) == 0)
2599 this_hdr
->sh_flags
|= SHF_WRITE
;
2600 if ((asect
->flags
& SEC_CODE
) != 0)
2601 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2602 if ((asect
->flags
& SEC_MERGE
) != 0)
2604 this_hdr
->sh_flags
|= SHF_MERGE
;
2605 this_hdr
->sh_entsize
= asect
->entsize
;
2606 if ((asect
->flags
& SEC_STRINGS
) != 0)
2607 this_hdr
->sh_flags
|= SHF_STRINGS
;
2609 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2610 this_hdr
->sh_flags
|= SHF_GROUP
;
2611 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2613 this_hdr
->sh_flags
|= SHF_TLS
;
2614 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2616 struct bfd_link_order
*o
;
2618 this_hdr
->sh_size
= 0;
2619 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2620 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2621 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2622 if (this_hdr
->sh_size
)
2623 this_hdr
->sh_type
= SHT_NOBITS
;
2627 /* Check for processor-specific section types. */
2628 if (bed
->elf_backend_fake_sections
2629 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2632 /* If the section has relocs, set up a section header for the
2633 SHT_REL[A] section. If two relocation sections are required for
2634 this section, it is up to the processor-specific back-end to
2635 create the other. */
2636 if ((asect
->flags
& SEC_RELOC
) != 0
2637 && !_bfd_elf_init_reloc_shdr (abfd
,
2638 &elf_section_data (asect
)->rel_hdr
,
2644 /* Fill in the contents of a SHT_GROUP section. */
2647 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2649 bfd_boolean
*failedptr
= failedptrarg
;
2650 unsigned long symindx
;
2651 asection
*elt
, *first
;
2653 struct bfd_link_order
*l
;
2656 /* Ignore linker created group section. See elfNN_ia64_object_p in
2658 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2663 if (elf_group_id (sec
) != NULL
)
2664 symindx
= elf_group_id (sec
)->udata
.i
;
2668 /* If called from the assembler, swap_out_syms will have set up
2669 elf_section_syms; If called for "ld -r", use target_index. */
2670 if (elf_section_syms (abfd
) != NULL
)
2671 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2673 symindx
= sec
->target_index
;
2675 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2677 /* The contents won't be allocated for "ld -r" or objcopy. */
2679 if (sec
->contents
== NULL
)
2682 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2684 /* Arrange for the section to be written out. */
2685 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2686 if (sec
->contents
== NULL
)
2693 loc
= sec
->contents
+ sec
->size
;
2695 /* Get the pointer to the first section in the group that gas
2696 squirreled away here. objcopy arranges for this to be set to the
2697 start of the input section group. */
2698 first
= elt
= elf_next_in_group (sec
);
2700 /* First element is a flag word. Rest of section is elf section
2701 indices for all the sections of the group. Write them backwards
2702 just to keep the group in the same order as given in .section
2703 directives, not that it matters. */
2712 s
= s
->output_section
;
2715 idx
= elf_section_data (s
)->this_idx
;
2716 H_PUT_32 (abfd
, idx
, loc
);
2717 elt
= elf_next_in_group (elt
);
2722 /* If this is a relocatable link, then the above did nothing because
2723 SEC is the output section. Look through the input sections
2725 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2726 if (l
->type
== bfd_indirect_link_order
2727 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2732 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2733 elt
= elf_next_in_group (elt
);
2734 /* During a relocatable link, the lists are circular. */
2736 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2738 if ((loc
-= 4) != sec
->contents
)
2741 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2744 /* Assign all ELF section numbers. The dummy first section is handled here
2745 too. The link/info pointers for the standard section types are filled
2746 in here too, while we're at it. */
2749 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2751 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2753 unsigned int section_number
, secn
;
2754 Elf_Internal_Shdr
**i_shdrp
;
2756 struct bfd_elf_section_data
*d
;
2760 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2762 /* SHT_GROUP sections are in relocatable files only. */
2763 if (link_info
== NULL
|| link_info
->relocatable
)
2767 /* Put SHT_GROUP sections first. */
2768 for (sec
= abfd
->sections
; sec
; sec
= n
)
2770 d
= elf_section_data (sec
);
2773 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2775 if (sec
->flags
& SEC_LINKER_CREATED
)
2777 /* Remove the linker created SHT_GROUP sections. */
2778 bfd_section_list_remove (abfd
, sec
);
2779 abfd
->section_count
--;
2783 if (section_number
== SHN_LORESERVE
)
2784 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2785 d
->this_idx
= section_number
++;
2791 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2793 d
= elf_section_data (sec
);
2795 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2797 if (section_number
== SHN_LORESERVE
)
2798 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2799 d
->this_idx
= section_number
++;
2801 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2802 if ((sec
->flags
& SEC_RELOC
) == 0)
2806 if (section_number
== SHN_LORESERVE
)
2807 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2808 d
->rel_idx
= section_number
++;
2809 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2814 if (section_number
== SHN_LORESERVE
)
2815 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2816 d
->rel_idx2
= section_number
++;
2817 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2823 if (section_number
== SHN_LORESERVE
)
2824 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2825 t
->shstrtab_section
= section_number
++;
2826 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2827 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2829 if (bfd_get_symcount (abfd
) > 0)
2831 if (section_number
== SHN_LORESERVE
)
2832 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2833 t
->symtab_section
= section_number
++;
2834 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2835 if (section_number
> SHN_LORESERVE
- 2)
2837 if (section_number
== SHN_LORESERVE
)
2838 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2839 t
->symtab_shndx_section
= section_number
++;
2840 t
->symtab_shndx_hdr
.sh_name
2841 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2842 ".symtab_shndx", FALSE
);
2843 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2846 if (section_number
== SHN_LORESERVE
)
2847 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2848 t
->strtab_section
= section_number
++;
2849 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2852 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2853 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2855 elf_numsections (abfd
) = section_number
;
2856 elf_elfheader (abfd
)->e_shnum
= section_number
;
2857 if (section_number
> SHN_LORESERVE
)
2858 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2860 /* Set up the list of section header pointers, in agreement with the
2862 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2863 i_shdrp
= bfd_zalloc (abfd
, amt
);
2864 if (i_shdrp
== NULL
)
2867 amt
= sizeof (Elf_Internal_Shdr
);
2868 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2869 if (i_shdrp
[0] == NULL
)
2871 bfd_release (abfd
, i_shdrp
);
2875 elf_elfsections (abfd
) = i_shdrp
;
2877 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2878 if (bfd_get_symcount (abfd
) > 0)
2880 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2881 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2883 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2884 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2886 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2887 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2890 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2892 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2896 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2897 if (d
->rel_idx
!= 0)
2898 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2899 if (d
->rel_idx2
!= 0)
2900 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2902 /* Fill in the sh_link and sh_info fields while we're at it. */
2904 /* sh_link of a reloc section is the section index of the symbol
2905 table. sh_info is the section index of the section to which
2906 the relocation entries apply. */
2907 if (d
->rel_idx
!= 0)
2909 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2910 d
->rel_hdr
.sh_info
= d
->this_idx
;
2912 if (d
->rel_idx2
!= 0)
2914 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2915 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2918 /* We need to set up sh_link for SHF_LINK_ORDER. */
2919 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2921 s
= elf_linked_to_section (sec
);
2923 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2926 struct bfd_link_order
*p
;
2928 /* Find out what the corresponding section in output
2930 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2932 s
= p
->u
.indirect
.section
;
2933 if (p
->type
== bfd_indirect_link_order
2934 && (bfd_get_flavour (s
->owner
)
2935 == bfd_target_elf_flavour
))
2937 Elf_Internal_Shdr
** const elf_shdrp
2938 = elf_elfsections (s
->owner
);
2940 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2941 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2943 The Intel C compiler generates SHT_IA_64_UNWIND with
2944 SHF_LINK_ORDER. But it doesn't set the sh_link or
2945 sh_info fields. Hence we could get the situation
2946 where elfsec is 0. */
2949 const struct elf_backend_data
*bed
2950 = get_elf_backend_data (abfd
);
2951 if (bed
->link_order_error_handler
)
2952 bed
->link_order_error_handler
2953 (_("%B: warning: sh_link not set for section `%A'"),
2958 s
= elf_shdrp
[elfsec
]->bfd_section
;
2959 if (elf_discarded_section (s
))
2962 (*_bfd_error_handler
)
2963 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2964 abfd
, d
->this_hdr
.bfd_section
,
2966 /* Point to the kept section if it has
2967 the same size as the discarded
2969 kept
= _bfd_elf_check_kept_section (s
);
2972 bfd_set_error (bfd_error_bad_value
);
2977 s
= s
->output_section
;
2978 BFD_ASSERT (s
!= NULL
);
2979 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2987 switch (d
->this_hdr
.sh_type
)
2991 /* A reloc section which we are treating as a normal BFD
2992 section. sh_link is the section index of the symbol
2993 table. sh_info is the section index of the section to
2994 which the relocation entries apply. We assume that an
2995 allocated reloc section uses the dynamic symbol table.
2996 FIXME: How can we be sure? */
2997 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2999 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3001 /* We look up the section the relocs apply to by name. */
3003 if (d
->this_hdr
.sh_type
== SHT_REL
)
3007 s
= bfd_get_section_by_name (abfd
, name
);
3009 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3013 /* We assume that a section named .stab*str is a stabs
3014 string section. We look for a section with the same name
3015 but without the trailing ``str'', and set its sh_link
3016 field to point to this section. */
3017 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3018 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3023 len
= strlen (sec
->name
);
3024 alc
= bfd_malloc (len
- 2);
3027 memcpy (alc
, sec
->name
, len
- 3);
3028 alc
[len
- 3] = '\0';
3029 s
= bfd_get_section_by_name (abfd
, alc
);
3033 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3035 /* This is a .stab section. */
3036 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3037 elf_section_data (s
)->this_hdr
.sh_entsize
3038 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3045 case SHT_GNU_verneed
:
3046 case SHT_GNU_verdef
:
3047 /* sh_link is the section header index of the string table
3048 used for the dynamic entries, or the symbol table, or the
3050 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3052 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3055 case SHT_GNU_LIBLIST
:
3056 /* sh_link is the section header index of the prelink library
3058 used for the dynamic entries, or the symbol table, or the
3060 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3061 ? ".dynstr" : ".gnu.libstr");
3063 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3067 case SHT_GNU_versym
:
3068 /* sh_link is the section header index of the symbol table
3069 this hash table or version table is for. */
3070 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3072 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3076 d
->this_hdr
.sh_link
= t
->symtab_section
;
3080 for (secn
= 1; secn
< section_number
; ++secn
)
3081 if (i_shdrp
[secn
] == NULL
)
3082 i_shdrp
[secn
] = i_shdrp
[0];
3084 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3085 i_shdrp
[secn
]->sh_name
);
3089 /* Map symbol from it's internal number to the external number, moving
3090 all local symbols to be at the head of the list. */
3093 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3095 /* If the backend has a special mapping, use it. */
3096 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3097 if (bed
->elf_backend_sym_is_global
)
3098 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3100 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3101 || bfd_is_und_section (bfd_get_section (sym
))
3102 || bfd_is_com_section (bfd_get_section (sym
)));
3106 elf_map_symbols (bfd
*abfd
)
3108 unsigned int symcount
= bfd_get_symcount (abfd
);
3109 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3110 asymbol
**sect_syms
;
3111 unsigned int num_locals
= 0;
3112 unsigned int num_globals
= 0;
3113 unsigned int num_locals2
= 0;
3114 unsigned int num_globals2
= 0;
3122 fprintf (stderr
, "elf_map_symbols\n");
3126 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3128 if (max_index
< asect
->index
)
3129 max_index
= asect
->index
;
3133 amt
= max_index
* sizeof (asymbol
*);
3134 sect_syms
= bfd_zalloc (abfd
, amt
);
3135 if (sect_syms
== NULL
)
3137 elf_section_syms (abfd
) = sect_syms
;
3138 elf_num_section_syms (abfd
) = max_index
;
3140 /* Init sect_syms entries for any section symbols we have already
3141 decided to output. */
3142 for (idx
= 0; idx
< symcount
; idx
++)
3144 asymbol
*sym
= syms
[idx
];
3146 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3153 if (sec
->owner
!= NULL
)
3155 if (sec
->owner
!= abfd
)
3157 if (sec
->output_offset
!= 0)
3160 sec
= sec
->output_section
;
3162 /* Empty sections in the input files may have had a
3163 section symbol created for them. (See the comment
3164 near the end of _bfd_generic_link_output_symbols in
3165 linker.c). If the linker script discards such
3166 sections then we will reach this point. Since we know
3167 that we cannot avoid this case, we detect it and skip
3168 the abort and the assignment to the sect_syms array.
3169 To reproduce this particular case try running the
3170 linker testsuite test ld-scripts/weak.exp for an ELF
3171 port that uses the generic linker. */
3172 if (sec
->owner
== NULL
)
3175 BFD_ASSERT (sec
->owner
== abfd
);
3177 sect_syms
[sec
->index
] = syms
[idx
];
3182 /* Classify all of the symbols. */
3183 for (idx
= 0; idx
< symcount
; idx
++)
3185 if (!sym_is_global (abfd
, syms
[idx
]))
3191 /* We will be adding a section symbol for each BFD section. Most normal
3192 sections will already have a section symbol in outsymbols, but
3193 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3194 at least in that case. */
3195 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3197 if (sect_syms
[asect
->index
] == NULL
)
3199 if (!sym_is_global (abfd
, asect
->symbol
))
3206 /* Now sort the symbols so the local symbols are first. */
3207 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3208 new_syms
= bfd_alloc (abfd
, amt
);
3210 if (new_syms
== NULL
)
3213 for (idx
= 0; idx
< symcount
; idx
++)
3215 asymbol
*sym
= syms
[idx
];
3218 if (!sym_is_global (abfd
, sym
))
3221 i
= num_locals
+ num_globals2
++;
3223 sym
->udata
.i
= i
+ 1;
3225 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3227 if (sect_syms
[asect
->index
] == NULL
)
3229 asymbol
*sym
= asect
->symbol
;
3232 sect_syms
[asect
->index
] = sym
;
3233 if (!sym_is_global (abfd
, sym
))
3236 i
= num_locals
+ num_globals2
++;
3238 sym
->udata
.i
= i
+ 1;
3242 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3244 elf_num_locals (abfd
) = num_locals
;
3245 elf_num_globals (abfd
) = num_globals
;
3249 /* Align to the maximum file alignment that could be required for any
3250 ELF data structure. */
3252 static inline file_ptr
3253 align_file_position (file_ptr off
, int align
)
3255 return (off
+ align
- 1) & ~(align
- 1);
3258 /* Assign a file position to a section, optionally aligning to the
3259 required section alignment. */
3262 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3270 al
= i_shdrp
->sh_addralign
;
3272 offset
= BFD_ALIGN (offset
, al
);
3274 i_shdrp
->sh_offset
= offset
;
3275 if (i_shdrp
->bfd_section
!= NULL
)
3276 i_shdrp
->bfd_section
->filepos
= offset
;
3277 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3278 offset
+= i_shdrp
->sh_size
;
3282 /* Compute the file positions we are going to put the sections at, and
3283 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3284 is not NULL, this is being called by the ELF backend linker. */
3287 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3288 struct bfd_link_info
*link_info
)
3290 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3292 struct bfd_strtab_hash
*strtab
= NULL
;
3293 Elf_Internal_Shdr
*shstrtab_hdr
;
3295 if (abfd
->output_has_begun
)
3298 /* Do any elf backend specific processing first. */
3299 if (bed
->elf_backend_begin_write_processing
)
3300 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3302 if (! prep_headers (abfd
))
3305 /* Post process the headers if necessary. */
3306 if (bed
->elf_backend_post_process_headers
)
3307 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3310 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3314 if (!assign_section_numbers (abfd
, link_info
))
3317 /* The backend linker builds symbol table information itself. */
3318 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3320 /* Non-zero if doing a relocatable link. */
3321 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3323 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3327 if (link_info
== NULL
)
3329 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3334 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3335 /* sh_name was set in prep_headers. */
3336 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3337 shstrtab_hdr
->sh_flags
= 0;
3338 shstrtab_hdr
->sh_addr
= 0;
3339 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3340 shstrtab_hdr
->sh_entsize
= 0;
3341 shstrtab_hdr
->sh_link
= 0;
3342 shstrtab_hdr
->sh_info
= 0;
3343 /* sh_offset is set in assign_file_positions_except_relocs. */
3344 shstrtab_hdr
->sh_addralign
= 1;
3346 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3349 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3352 Elf_Internal_Shdr
*hdr
;
3354 off
= elf_tdata (abfd
)->next_file_pos
;
3356 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3357 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3359 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3360 if (hdr
->sh_size
!= 0)
3361 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3363 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3364 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3366 elf_tdata (abfd
)->next_file_pos
= off
;
3368 /* Now that we know where the .strtab section goes, write it
3370 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3371 || ! _bfd_stringtab_emit (abfd
, strtab
))
3373 _bfd_stringtab_free (strtab
);
3376 abfd
->output_has_begun
= TRUE
;
3381 /* Create a mapping from a set of sections to a program segment. */
3383 static struct elf_segment_map
*
3384 make_mapping (bfd
*abfd
,
3385 asection
**sections
,
3390 struct elf_segment_map
*m
;
3395 amt
= sizeof (struct elf_segment_map
);
3396 amt
+= (to
- from
- 1) * sizeof (asection
*);
3397 m
= bfd_zalloc (abfd
, amt
);
3401 m
->p_type
= PT_LOAD
;
3402 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3403 m
->sections
[i
- from
] = *hdrpp
;
3404 m
->count
= to
- from
;
3406 if (from
== 0 && phdr
)
3408 /* Include the headers in the first PT_LOAD segment. */
3409 m
->includes_filehdr
= 1;
3410 m
->includes_phdrs
= 1;
3416 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3419 struct elf_segment_map
*
3420 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3422 struct elf_segment_map
*m
;
3424 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3428 m
->p_type
= PT_DYNAMIC
;
3430 m
->sections
[0] = dynsec
;
3435 /* Set up a mapping from BFD sections to program segments. */
3438 map_sections_to_segments (bfd
*abfd
)
3440 asection
**sections
= NULL
;
3444 struct elf_segment_map
*mfirst
;
3445 struct elf_segment_map
**pm
;
3446 struct elf_segment_map
*m
;
3449 unsigned int phdr_index
;
3450 bfd_vma maxpagesize
;
3452 bfd_boolean phdr_in_segment
= TRUE
;
3453 bfd_boolean writable
;
3455 asection
*first_tls
= NULL
;
3456 asection
*dynsec
, *eh_frame_hdr
;
3459 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3462 if (bfd_count_sections (abfd
) == 0)
3465 /* Select the allocated sections, and sort them. */
3467 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3468 sections
= bfd_malloc (amt
);
3469 if (sections
== NULL
)
3473 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3475 if ((s
->flags
& SEC_ALLOC
) != 0)
3481 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3484 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3486 /* Build the mapping. */
3491 /* If we have a .interp section, then create a PT_PHDR segment for
3492 the program headers and a PT_INTERP segment for the .interp
3494 s
= bfd_get_section_by_name (abfd
, ".interp");
3495 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3497 amt
= sizeof (struct elf_segment_map
);
3498 m
= bfd_zalloc (abfd
, amt
);
3502 m
->p_type
= PT_PHDR
;
3503 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3504 m
->p_flags
= PF_R
| PF_X
;
3505 m
->p_flags_valid
= 1;
3506 m
->includes_phdrs
= 1;
3511 amt
= sizeof (struct elf_segment_map
);
3512 m
= bfd_zalloc (abfd
, amt
);
3516 m
->p_type
= PT_INTERP
;
3524 /* Look through the sections. We put sections in the same program
3525 segment when the start of the second section can be placed within
3526 a few bytes of the end of the first section. */
3530 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3532 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3534 && (dynsec
->flags
& SEC_LOAD
) == 0)
3537 /* Deal with -Ttext or something similar such that the first section
3538 is not adjacent to the program headers. This is an
3539 approximation, since at this point we don't know exactly how many
3540 program headers we will need. */
3543 bfd_size_type phdr_size
;
3545 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3547 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3548 if ((abfd
->flags
& D_PAGED
) == 0
3549 || sections
[0]->lma
< phdr_size
3550 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3551 phdr_in_segment
= FALSE
;
3554 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3557 bfd_boolean new_segment
;
3561 /* See if this section and the last one will fit in the same
3564 if (last_hdr
== NULL
)
3566 /* If we don't have a segment yet, then we don't need a new
3567 one (we build the last one after this loop). */
3568 new_segment
= FALSE
;
3570 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3572 /* If this section has a different relation between the
3573 virtual address and the load address, then we need a new
3577 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3578 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3580 /* If putting this section in this segment would force us to
3581 skip a page in the segment, then we need a new segment. */
3584 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3585 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3587 /* We don't want to put a loadable section after a
3588 nonloadable section in the same segment.
3589 Consider .tbss sections as loadable for this purpose. */
3592 else if ((abfd
->flags
& D_PAGED
) == 0)
3594 /* If the file is not demand paged, which means that we
3595 don't require the sections to be correctly aligned in the
3596 file, then there is no other reason for a new segment. */
3597 new_segment
= FALSE
;
3600 && (hdr
->flags
& SEC_READONLY
) == 0
3601 && (((last_hdr
->lma
+ last_size
- 1)
3602 & ~(maxpagesize
- 1))
3603 != (hdr
->lma
& ~(maxpagesize
- 1))))
3605 /* We don't want to put a writable section in a read only
3606 segment, unless they are on the same page in memory
3607 anyhow. We already know that the last section does not
3608 bring us past the current section on the page, so the
3609 only case in which the new section is not on the same
3610 page as the previous section is when the previous section
3611 ends precisely on a page boundary. */
3616 /* Otherwise, we can use the same segment. */
3617 new_segment
= FALSE
;
3622 if ((hdr
->flags
& SEC_READONLY
) == 0)
3625 /* .tbss sections effectively have zero size. */
3626 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3627 last_size
= hdr
->size
;
3633 /* We need a new program segment. We must create a new program
3634 header holding all the sections from phdr_index until hdr. */
3636 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3643 if ((hdr
->flags
& SEC_READONLY
) == 0)
3649 /* .tbss sections effectively have zero size. */
3650 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3651 last_size
= hdr
->size
;
3655 phdr_in_segment
= FALSE
;
3658 /* Create a final PT_LOAD program segment. */
3659 if (last_hdr
!= NULL
)
3661 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3669 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3672 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3679 /* For each loadable .note section, add a PT_NOTE segment. We don't
3680 use bfd_get_section_by_name, because if we link together
3681 nonloadable .note sections and loadable .note sections, we will
3682 generate two .note sections in the output file. FIXME: Using
3683 names for section types is bogus anyhow. */
3684 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3686 if ((s
->flags
& SEC_LOAD
) != 0
3687 && strncmp (s
->name
, ".note", 5) == 0)
3689 amt
= sizeof (struct elf_segment_map
);
3690 m
= bfd_zalloc (abfd
, amt
);
3694 m
->p_type
= PT_NOTE
;
3701 if (s
->flags
& SEC_THREAD_LOCAL
)
3709 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3714 amt
= sizeof (struct elf_segment_map
);
3715 amt
+= (tls_count
- 1) * sizeof (asection
*);
3716 m
= bfd_zalloc (abfd
, amt
);
3721 m
->count
= tls_count
;
3722 /* Mandated PF_R. */
3724 m
->p_flags_valid
= 1;
3725 for (i
= 0; i
< tls_count
; ++i
)
3727 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3728 m
->sections
[i
] = first_tls
;
3729 first_tls
= first_tls
->next
;
3736 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3738 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3739 if (eh_frame_hdr
!= NULL
3740 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3742 amt
= sizeof (struct elf_segment_map
);
3743 m
= bfd_zalloc (abfd
, amt
);
3747 m
->p_type
= PT_GNU_EH_FRAME
;
3749 m
->sections
[0] = eh_frame_hdr
->output_section
;
3755 if (elf_tdata (abfd
)->stack_flags
)
3757 amt
= sizeof (struct elf_segment_map
);
3758 m
= bfd_zalloc (abfd
, amt
);
3762 m
->p_type
= PT_GNU_STACK
;
3763 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3764 m
->p_flags_valid
= 1;
3770 if (elf_tdata (abfd
)->relro
)
3772 amt
= sizeof (struct elf_segment_map
);
3773 m
= bfd_zalloc (abfd
, amt
);
3777 m
->p_type
= PT_GNU_RELRO
;
3779 m
->p_flags_valid
= 1;
3788 elf_tdata (abfd
)->segment_map
= mfirst
;
3792 if (sections
!= NULL
)
3797 /* Sort sections by address. */
3800 elf_sort_sections (const void *arg1
, const void *arg2
)
3802 const asection
*sec1
= *(const asection
**) arg1
;
3803 const asection
*sec2
= *(const asection
**) arg2
;
3804 bfd_size_type size1
, size2
;
3806 /* Sort by LMA first, since this is the address used to
3807 place the section into a segment. */
3808 if (sec1
->lma
< sec2
->lma
)
3810 else if (sec1
->lma
> sec2
->lma
)
3813 /* Then sort by VMA. Normally the LMA and the VMA will be
3814 the same, and this will do nothing. */
3815 if (sec1
->vma
< sec2
->vma
)
3817 else if (sec1
->vma
> sec2
->vma
)
3820 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3822 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3828 /* If the indicies are the same, do not return 0
3829 here, but continue to try the next comparison. */
3830 if (sec1
->target_index
- sec2
->target_index
!= 0)
3831 return sec1
->target_index
- sec2
->target_index
;
3836 else if (TOEND (sec2
))
3841 /* Sort by size, to put zero sized sections
3842 before others at the same address. */
3844 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3845 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3852 return sec1
->target_index
- sec2
->target_index
;
3855 /* Ian Lance Taylor writes:
3857 We shouldn't be using % with a negative signed number. That's just
3858 not good. We have to make sure either that the number is not
3859 negative, or that the number has an unsigned type. When the types
3860 are all the same size they wind up as unsigned. When file_ptr is a
3861 larger signed type, the arithmetic winds up as signed long long,
3864 What we're trying to say here is something like ``increase OFF by
3865 the least amount that will cause it to be equal to the VMA modulo
3867 /* In other words, something like:
3869 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3870 off_offset = off % bed->maxpagesize;
3871 if (vma_offset < off_offset)
3872 adjustment = vma_offset + bed->maxpagesize - off_offset;
3874 adjustment = vma_offset - off_offset;
3876 which can can be collapsed into the expression below. */
3879 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3881 return ((vma
- off
) % maxpagesize
);
3884 /* Assign file positions to the sections based on the mapping from
3885 sections to segments. This function also sets up some fields in
3886 the file header, and writes out the program headers. */
3889 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3891 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3893 struct elf_segment_map
*m
;
3895 Elf_Internal_Phdr
*phdrs
;
3897 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3898 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3899 Elf_Internal_Phdr
*p
;
3902 if (elf_tdata (abfd
)->segment_map
== NULL
)
3904 if (! map_sections_to_segments (abfd
))
3909 /* The placement algorithm assumes that non allocated sections are
3910 not in PT_LOAD segments. We ensure this here by removing such
3911 sections from the segment map. */
3912 for (m
= elf_tdata (abfd
)->segment_map
;
3916 unsigned int new_count
;
3919 if (m
->p_type
!= PT_LOAD
)
3923 for (i
= 0; i
< m
->count
; i
++)
3925 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3928 m
->sections
[new_count
] = m
->sections
[i
];
3934 if (new_count
!= m
->count
)
3935 m
->count
= new_count
;
3939 if (bed
->elf_backend_modify_segment_map
)
3941 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3946 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3949 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3950 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3951 elf_elfheader (abfd
)->e_phnum
= count
;
3955 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
3959 /* If we already counted the number of program segments, make sure
3960 that we allocated enough space. This happens when SIZEOF_HEADERS
3961 is used in a linker script. */
3962 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3963 if (alloc
!= 0 && count
> alloc
)
3965 ((*_bfd_error_handler
)
3966 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
3967 abfd
, alloc
, count
));
3968 bfd_set_error (bfd_error_bad_value
);
3975 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3976 phdrs
= bfd_alloc (abfd
, amt
);
3980 off
= bed
->s
->sizeof_ehdr
;
3981 off
+= alloc
* bed
->s
->sizeof_phdr
;
3988 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3995 /* If elf_segment_map is not from map_sections_to_segments, the
3996 sections may not be correctly ordered. NOTE: sorting should
3997 not be done to the PT_NOTE section of a corefile, which may
3998 contain several pseudo-sections artificially created by bfd.
3999 Sorting these pseudo-sections breaks things badly. */
4001 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4002 && m
->p_type
== PT_NOTE
))
4003 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4006 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4007 number of sections with contents contributing to both p_filesz
4008 and p_memsz, followed by a number of sections with no contents
4009 that just contribute to p_memsz. In this loop, OFF tracks next
4010 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4011 an adjustment we use for segments that have no file contents
4012 but need zero filled memory allocation. */
4014 p
->p_type
= m
->p_type
;
4015 p
->p_flags
= m
->p_flags
;
4017 if (p
->p_type
== PT_LOAD
4020 bfd_size_type align
;
4023 if ((abfd
->flags
& D_PAGED
) != 0)
4024 align
= bed
->maxpagesize
;
4027 unsigned int align_power
= 0;
4028 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4030 unsigned int secalign
;
4032 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4033 if (secalign
> align_power
)
4034 align_power
= secalign
;
4036 align
= (bfd_size_type
) 1 << align_power
;
4039 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4042 && !m
->includes_filehdr
4043 && !m
->includes_phdrs
4044 && (ufile_ptr
) off
>= align
)
4046 /* If the first section isn't loadable, the same holds for
4047 any other sections. Since the segment won't need file
4048 space, we can make p_offset overlap some prior segment.
4049 However, .tbss is special. If a segment starts with
4050 .tbss, we need to look at the next section to decide
4051 whether the segment has any loadable sections. */
4053 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4055 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4059 voff
= adjust
- align
;
4065 /* Make sure the .dynamic section is the first section in the
4066 PT_DYNAMIC segment. */
4067 else if (p
->p_type
== PT_DYNAMIC
4069 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4072 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4074 bfd_set_error (bfd_error_bad_value
);
4081 p
->p_vaddr
= m
->sections
[0]->vma
;
4083 if (m
->p_paddr_valid
)
4084 p
->p_paddr
= m
->p_paddr
;
4085 else if (m
->count
== 0)
4088 p
->p_paddr
= m
->sections
[0]->lma
;
4090 if (p
->p_type
== PT_LOAD
4091 && (abfd
->flags
& D_PAGED
) != 0)
4092 p
->p_align
= bed
->maxpagesize
;
4093 else if (m
->count
== 0)
4094 p
->p_align
= 1 << bed
->s
->log_file_align
;
4102 if (m
->includes_filehdr
)
4104 if (! m
->p_flags_valid
)
4107 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4108 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4111 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4113 if (p
->p_vaddr
< (bfd_vma
) off
)
4115 (*_bfd_error_handler
)
4116 (_("%B: Not enough room for program headers, try linking with -N"),
4118 bfd_set_error (bfd_error_bad_value
);
4123 if (! m
->p_paddr_valid
)
4126 if (p
->p_type
== PT_LOAD
)
4128 filehdr_vaddr
= p
->p_vaddr
;
4129 filehdr_paddr
= p
->p_paddr
;
4133 if (m
->includes_phdrs
)
4135 if (! m
->p_flags_valid
)
4138 if (m
->includes_filehdr
)
4140 if (p
->p_type
== PT_LOAD
)
4142 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4143 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4148 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4152 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4153 p
->p_vaddr
-= off
- p
->p_offset
;
4154 if (! m
->p_paddr_valid
)
4155 p
->p_paddr
-= off
- p
->p_offset
;
4158 if (p
->p_type
== PT_LOAD
)
4160 phdrs_vaddr
= p
->p_vaddr
;
4161 phdrs_paddr
= p
->p_paddr
;
4164 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4167 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4168 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4171 if (p
->p_type
== PT_LOAD
4172 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4174 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4175 p
->p_offset
= off
+ voff
;
4180 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4181 p
->p_filesz
+= adjust
;
4182 p
->p_memsz
+= adjust
;
4186 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4190 bfd_size_type align
;
4194 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4196 if (p
->p_type
== PT_LOAD
4197 || p
->p_type
== PT_TLS
)
4199 bfd_signed_vma adjust
;
4201 if ((flags
& SEC_LOAD
) != 0)
4203 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4206 (*_bfd_error_handler
)
4207 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4208 abfd
, sec
, (unsigned long) sec
->lma
);
4212 p
->p_filesz
+= adjust
;
4213 p
->p_memsz
+= adjust
;
4215 /* .tbss is special. It doesn't contribute to p_memsz of
4217 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4218 || p
->p_type
== PT_TLS
)
4220 /* The section VMA must equal the file position
4221 modulo the page size. */
4222 bfd_size_type page
= align
;
4223 if ((abfd
->flags
& D_PAGED
) != 0)
4224 page
= bed
->maxpagesize
;
4225 adjust
= vma_page_aligned_bias (sec
->vma
,
4226 p
->p_vaddr
+ p
->p_memsz
,
4228 p
->p_memsz
+= adjust
;
4232 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4234 /* The section at i == 0 is the one that actually contains
4240 p
->p_filesz
= sec
->size
;
4246 /* The rest are fake sections that shouldn't be written. */
4255 if (p
->p_type
== PT_LOAD
)
4258 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4259 1997, and the exact reason for it isn't clear. One
4260 plausible explanation is that it is to work around
4261 a problem we have with linker scripts using data
4262 statements in NOLOAD sections. I don't think it
4263 makes a great deal of sense to have such a section
4264 assigned to a PT_LOAD segment, but apparently
4265 people do this. The data statement results in a
4266 bfd_data_link_order being built, and these need
4267 section contents to write into. Eventually, we get
4268 to _bfd_elf_write_object_contents which writes any
4269 section with contents to the output. Make room
4270 here for the write, so that following segments are
4272 if ((flags
& SEC_LOAD
) != 0
4273 || (flags
& SEC_HAS_CONTENTS
) != 0)
4277 if ((flags
& SEC_LOAD
) != 0)
4279 p
->p_filesz
+= sec
->size
;
4280 p
->p_memsz
+= sec
->size
;
4282 /* PR ld/594: Sections in note segments which are not loaded
4283 contribute to the file size but not the in-memory size. */
4284 else if (p
->p_type
== PT_NOTE
4285 && (flags
& SEC_HAS_CONTENTS
) != 0)
4286 p
->p_filesz
+= sec
->size
;
4288 /* .tbss is special. It doesn't contribute to p_memsz of
4290 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4291 || p
->p_type
== PT_TLS
)
4292 p
->p_memsz
+= sec
->size
;
4294 if (p
->p_type
== PT_TLS
4296 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4298 struct bfd_link_order
*o
;
4299 bfd_vma tbss_size
= 0;
4301 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4302 if (tbss_size
< o
->offset
+ o
->size
)
4303 tbss_size
= o
->offset
+ o
->size
;
4305 p
->p_memsz
+= tbss_size
;
4308 if (align
> p
->p_align
4309 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4313 if (! m
->p_flags_valid
)
4316 if ((flags
& SEC_CODE
) != 0)
4318 if ((flags
& SEC_READONLY
) == 0)
4324 /* Now that we have set the section file positions, we can set up
4325 the file positions for the non PT_LOAD segments. */
4326 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4330 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4332 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4333 /* If the section has not yet been assigned a file position,
4334 do so now. The ARM BPABI requires that .dynamic section
4335 not be marked SEC_ALLOC because it is not part of any
4336 PT_LOAD segment, so it will not be processed above. */
4337 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4340 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4343 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4345 off
= (_bfd_elf_assign_file_position_for_section
4346 (i_shdrpp
[i
], off
, TRUE
));
4347 p
->p_filesz
= m
->sections
[0]->size
;
4349 p
->p_offset
= m
->sections
[0]->filepos
;
4353 if (m
->includes_filehdr
)
4355 p
->p_vaddr
= filehdr_vaddr
;
4356 if (! m
->p_paddr_valid
)
4357 p
->p_paddr
= filehdr_paddr
;
4359 else if (m
->includes_phdrs
)
4361 p
->p_vaddr
= phdrs_vaddr
;
4362 if (! m
->p_paddr_valid
)
4363 p
->p_paddr
= phdrs_paddr
;
4365 else if (p
->p_type
== PT_GNU_RELRO
)
4367 Elf_Internal_Phdr
*lp
;
4369 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4371 if (lp
->p_type
== PT_LOAD
4372 && lp
->p_vaddr
<= link_info
->relro_end
4373 && lp
->p_vaddr
>= link_info
->relro_start
4374 && lp
->p_vaddr
+ lp
->p_filesz
4375 >= link_info
->relro_end
)
4379 if (lp
< phdrs
+ count
4380 && link_info
->relro_end
> lp
->p_vaddr
)
4382 p
->p_vaddr
= lp
->p_vaddr
;
4383 p
->p_paddr
= lp
->p_paddr
;
4384 p
->p_offset
= lp
->p_offset
;
4385 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4386 p
->p_memsz
= p
->p_filesz
;
4388 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4392 memset (p
, 0, sizeof *p
);
4393 p
->p_type
= PT_NULL
;
4399 /* Clear out any program headers we allocated but did not use. */
4400 for (; count
< alloc
; count
++, p
++)
4402 memset (p
, 0, sizeof *p
);
4403 p
->p_type
= PT_NULL
;
4406 elf_tdata (abfd
)->phdr
= phdrs
;
4408 elf_tdata (abfd
)->next_file_pos
= off
;
4410 /* Write out the program headers. */
4411 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4412 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4418 /* Get the size of the program header.
4420 If this is called by the linker before any of the section VMA's are set, it
4421 can't calculate the correct value for a strange memory layout. This only
4422 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4423 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4424 data segment (exclusive of .interp and .dynamic).
4426 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4427 will be two segments. */
4429 static bfd_size_type
4430 get_program_header_size (bfd
*abfd
)
4434 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4436 /* We can't return a different result each time we're called. */
4437 if (elf_tdata (abfd
)->program_header_size
!= 0)
4438 return elf_tdata (abfd
)->program_header_size
;
4440 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4442 struct elf_segment_map
*m
;
4445 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4447 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4448 return elf_tdata (abfd
)->program_header_size
;
4451 /* Assume we will need exactly two PT_LOAD segments: one for text
4452 and one for data. */
4455 s
= bfd_get_section_by_name (abfd
, ".interp");
4456 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4458 /* If we have a loadable interpreter section, we need a
4459 PT_INTERP segment. In this case, assume we also need a
4460 PT_PHDR segment, although that may not be true for all
4465 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4467 /* We need a PT_DYNAMIC segment. */
4471 if (elf_tdata (abfd
)->eh_frame_hdr
)
4473 /* We need a PT_GNU_EH_FRAME segment. */
4477 if (elf_tdata (abfd
)->stack_flags
)
4479 /* We need a PT_GNU_STACK segment. */
4483 if (elf_tdata (abfd
)->relro
)
4485 /* We need a PT_GNU_RELRO segment. */
4489 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4491 if ((s
->flags
& SEC_LOAD
) != 0
4492 && strncmp (s
->name
, ".note", 5) == 0)
4494 /* We need a PT_NOTE segment. */
4499 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4501 if (s
->flags
& SEC_THREAD_LOCAL
)
4503 /* We need a PT_TLS segment. */
4509 /* Let the backend count up any program headers it might need. */
4510 if (bed
->elf_backend_additional_program_headers
)
4514 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4520 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4521 return elf_tdata (abfd
)->program_header_size
;
4524 /* Work out the file positions of all the sections. This is called by
4525 _bfd_elf_compute_section_file_positions. All the section sizes and
4526 VMAs must be known before this is called.
4528 Reloc sections come in two flavours: Those processed specially as
4529 "side-channel" data attached to a section to which they apply, and
4530 those that bfd doesn't process as relocations. The latter sort are
4531 stored in a normal bfd section by bfd_section_from_shdr. We don't
4532 consider the former sort here, unless they form part of the loadable
4533 image. Reloc sections not assigned here will be handled later by
4534 assign_file_positions_for_relocs.
4536 We also don't set the positions of the .symtab and .strtab here. */
4539 assign_file_positions_except_relocs (bfd
*abfd
,
4540 struct bfd_link_info
*link_info
)
4542 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4543 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4544 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4545 unsigned int num_sec
= elf_numsections (abfd
);
4547 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4549 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4550 && bfd_get_format (abfd
) != bfd_core
)
4552 Elf_Internal_Shdr
**hdrpp
;
4555 /* Start after the ELF header. */
4556 off
= i_ehdrp
->e_ehsize
;
4558 /* We are not creating an executable, which means that we are
4559 not creating a program header, and that the actual order of
4560 the sections in the file is unimportant. */
4561 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4563 Elf_Internal_Shdr
*hdr
;
4566 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4567 && hdr
->bfd_section
== NULL
)
4568 || i
== tdata
->symtab_section
4569 || i
== tdata
->symtab_shndx_section
4570 || i
== tdata
->strtab_section
)
4572 hdr
->sh_offset
= -1;
4575 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4577 if (i
== SHN_LORESERVE
- 1)
4579 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4580 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4587 Elf_Internal_Shdr
**hdrpp
;
4589 /* Assign file positions for the loaded sections based on the
4590 assignment of sections to segments. */
4591 if (! assign_file_positions_for_segments (abfd
, link_info
))
4594 /* Assign file positions for the other sections. */
4596 off
= elf_tdata (abfd
)->next_file_pos
;
4597 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4599 Elf_Internal_Shdr
*hdr
;
4602 if (hdr
->bfd_section
!= NULL
4603 && hdr
->bfd_section
->filepos
!= 0)
4604 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4605 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4607 ((*_bfd_error_handler
)
4608 (_("%B: warning: allocated section `%s' not in segment"),
4610 (hdr
->bfd_section
== NULL
4612 : hdr
->bfd_section
->name
)));
4613 if ((abfd
->flags
& D_PAGED
) != 0)
4614 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4617 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4619 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4622 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4623 && hdr
->bfd_section
== NULL
)
4624 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4625 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4626 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4627 hdr
->sh_offset
= -1;
4629 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4631 if (i
== SHN_LORESERVE
- 1)
4633 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4634 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4639 /* Place the section headers. */
4640 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4641 i_ehdrp
->e_shoff
= off
;
4642 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4644 elf_tdata (abfd
)->next_file_pos
= off
;
4650 prep_headers (bfd
*abfd
)
4652 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4653 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4654 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4655 struct elf_strtab_hash
*shstrtab
;
4656 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4658 i_ehdrp
= elf_elfheader (abfd
);
4659 i_shdrp
= elf_elfsections (abfd
);
4661 shstrtab
= _bfd_elf_strtab_init ();
4662 if (shstrtab
== NULL
)
4665 elf_shstrtab (abfd
) = shstrtab
;
4667 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4668 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4669 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4670 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4672 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4673 i_ehdrp
->e_ident
[EI_DATA
] =
4674 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4675 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4677 if ((abfd
->flags
& DYNAMIC
) != 0)
4678 i_ehdrp
->e_type
= ET_DYN
;
4679 else if ((abfd
->flags
& EXEC_P
) != 0)
4680 i_ehdrp
->e_type
= ET_EXEC
;
4681 else if (bfd_get_format (abfd
) == bfd_core
)
4682 i_ehdrp
->e_type
= ET_CORE
;
4684 i_ehdrp
->e_type
= ET_REL
;
4686 switch (bfd_get_arch (abfd
))
4688 case bfd_arch_unknown
:
4689 i_ehdrp
->e_machine
= EM_NONE
;
4692 /* There used to be a long list of cases here, each one setting
4693 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4694 in the corresponding bfd definition. To avoid duplication,
4695 the switch was removed. Machines that need special handling
4696 can generally do it in elf_backend_final_write_processing(),
4697 unless they need the information earlier than the final write.
4698 Such need can generally be supplied by replacing the tests for
4699 e_machine with the conditions used to determine it. */
4701 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4704 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4705 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4707 /* No program header, for now. */
4708 i_ehdrp
->e_phoff
= 0;
4709 i_ehdrp
->e_phentsize
= 0;
4710 i_ehdrp
->e_phnum
= 0;
4712 /* Each bfd section is section header entry. */
4713 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4714 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4716 /* If we're building an executable, we'll need a program header table. */
4717 if (abfd
->flags
& EXEC_P
)
4718 /* It all happens later. */
4722 i_ehdrp
->e_phentsize
= 0;
4724 i_ehdrp
->e_phoff
= 0;
4727 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4728 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4729 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4730 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4731 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4732 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4733 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4734 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4735 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4741 /* Assign file positions for all the reloc sections which are not part
4742 of the loadable file image. */
4745 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4748 unsigned int i
, num_sec
;
4749 Elf_Internal_Shdr
**shdrpp
;
4751 off
= elf_tdata (abfd
)->next_file_pos
;
4753 num_sec
= elf_numsections (abfd
);
4754 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4756 Elf_Internal_Shdr
*shdrp
;
4759 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4760 && shdrp
->sh_offset
== -1)
4761 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4764 elf_tdata (abfd
)->next_file_pos
= off
;
4768 _bfd_elf_write_object_contents (bfd
*abfd
)
4770 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4771 Elf_Internal_Ehdr
*i_ehdrp
;
4772 Elf_Internal_Shdr
**i_shdrp
;
4774 unsigned int count
, num_sec
;
4776 if (! abfd
->output_has_begun
4777 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4780 i_shdrp
= elf_elfsections (abfd
);
4781 i_ehdrp
= elf_elfheader (abfd
);
4784 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4788 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4790 /* After writing the headers, we need to write the sections too... */
4791 num_sec
= elf_numsections (abfd
);
4792 for (count
= 1; count
< num_sec
; count
++)
4794 if (bed
->elf_backend_section_processing
)
4795 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4796 if (i_shdrp
[count
]->contents
)
4798 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4800 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4801 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4804 if (count
== SHN_LORESERVE
- 1)
4805 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4808 /* Write out the section header names. */
4809 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4810 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4813 if (bed
->elf_backend_final_write_processing
)
4814 (*bed
->elf_backend_final_write_processing
) (abfd
,
4815 elf_tdata (abfd
)->linker
);
4817 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4821 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4823 /* Hopefully this can be done just like an object file. */
4824 return _bfd_elf_write_object_contents (abfd
);
4827 /* Given a section, search the header to find them. */
4830 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4832 const struct elf_backend_data
*bed
;
4835 if (elf_section_data (asect
) != NULL
4836 && elf_section_data (asect
)->this_idx
!= 0)
4837 return elf_section_data (asect
)->this_idx
;
4839 if (bfd_is_abs_section (asect
))
4841 else if (bfd_is_com_section (asect
))
4843 else if (bfd_is_und_section (asect
))
4848 bed
= get_elf_backend_data (abfd
);
4849 if (bed
->elf_backend_section_from_bfd_section
)
4853 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4858 bfd_set_error (bfd_error_nonrepresentable_section
);
4863 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4867 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4869 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4871 flagword flags
= asym_ptr
->flags
;
4873 /* When gas creates relocations against local labels, it creates its
4874 own symbol for the section, but does put the symbol into the
4875 symbol chain, so udata is 0. When the linker is generating
4876 relocatable output, this section symbol may be for one of the
4877 input sections rather than the output section. */
4878 if (asym_ptr
->udata
.i
== 0
4879 && (flags
& BSF_SECTION_SYM
)
4880 && asym_ptr
->section
)
4884 if (asym_ptr
->section
->output_section
!= NULL
)
4885 indx
= asym_ptr
->section
->output_section
->index
;
4887 indx
= asym_ptr
->section
->index
;
4888 if (indx
< elf_num_section_syms (abfd
)
4889 && elf_section_syms (abfd
)[indx
] != NULL
)
4890 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4893 idx
= asym_ptr
->udata
.i
;
4897 /* This case can occur when using --strip-symbol on a symbol
4898 which is used in a relocation entry. */
4899 (*_bfd_error_handler
)
4900 (_("%B: symbol `%s' required but not present"),
4901 abfd
, bfd_asymbol_name (asym_ptr
));
4902 bfd_set_error (bfd_error_no_symbols
);
4909 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4910 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4911 elf_symbol_flags (flags
));
4919 /* Copy private BFD data. This copies any program header information. */
4922 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4924 Elf_Internal_Ehdr
*iehdr
;
4925 struct elf_segment_map
*map
;
4926 struct elf_segment_map
*map_first
;
4927 struct elf_segment_map
**pointer_to_map
;
4928 Elf_Internal_Phdr
*segment
;
4931 unsigned int num_segments
;
4932 bfd_boolean phdr_included
= FALSE
;
4933 bfd_vma maxpagesize
;
4934 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4935 unsigned int phdr_adjust_num
= 0;
4936 const struct elf_backend_data
*bed
;
4938 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4939 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4942 if (elf_tdata (ibfd
)->phdr
== NULL
)
4945 bed
= get_elf_backend_data (ibfd
);
4946 iehdr
= elf_elfheader (ibfd
);
4949 pointer_to_map
= &map_first
;
4951 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4952 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4954 /* Returns the end address of the segment + 1. */
4955 #define SEGMENT_END(segment, start) \
4956 (start + (segment->p_memsz > segment->p_filesz \
4957 ? segment->p_memsz : segment->p_filesz))
4959 #define SECTION_SIZE(section, segment) \
4960 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4961 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4962 ? section->size : 0)
4964 /* Returns TRUE if the given section is contained within
4965 the given segment. VMA addresses are compared. */
4966 #define IS_CONTAINED_BY_VMA(section, segment) \
4967 (section->vma >= segment->p_vaddr \
4968 && (section->vma + SECTION_SIZE (section, segment) \
4969 <= (SEGMENT_END (segment, segment->p_vaddr))))
4971 /* Returns TRUE if the given section is contained within
4972 the given segment. LMA addresses are compared. */
4973 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4974 (section->lma >= base \
4975 && (section->lma + SECTION_SIZE (section, segment) \
4976 <= SEGMENT_END (segment, base)))
4978 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4979 #define IS_COREFILE_NOTE(p, s) \
4980 (p->p_type == PT_NOTE \
4981 && bfd_get_format (ibfd) == bfd_core \
4982 && s->vma == 0 && s->lma == 0 \
4983 && (bfd_vma) s->filepos >= p->p_offset \
4984 && ((bfd_vma) s->filepos + s->size \
4985 <= p->p_offset + p->p_filesz))
4987 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4988 linker, which generates a PT_INTERP section with p_vaddr and
4989 p_memsz set to 0. */
4990 #define IS_SOLARIS_PT_INTERP(p, s) \
4992 && p->p_paddr == 0 \
4993 && p->p_memsz == 0 \
4994 && p->p_filesz > 0 \
4995 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4997 && (bfd_vma) s->filepos >= p->p_offset \
4998 && ((bfd_vma) s->filepos + s->size \
4999 <= p->p_offset + p->p_filesz))
5001 /* Decide if the given section should be included in the given segment.
5002 A section will be included if:
5003 1. It is within the address space of the segment -- we use the LMA
5004 if that is set for the segment and the VMA otherwise,
5005 2. It is an allocated segment,
5006 3. There is an output section associated with it,
5007 4. The section has not already been allocated to a previous segment.
5008 5. PT_GNU_STACK segments do not include any sections.
5009 6. PT_TLS segment includes only SHF_TLS sections.
5010 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5011 8. PT_DYNAMIC should not contain empty sections at the beginning
5012 (with the possible exception of .dynamic). */
5013 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5014 ((((segment->p_paddr \
5015 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5016 : IS_CONTAINED_BY_VMA (section, segment)) \
5017 && (section->flags & SEC_ALLOC) != 0) \
5018 || IS_COREFILE_NOTE (segment, section)) \
5019 && section->output_section != NULL \
5020 && segment->p_type != PT_GNU_STACK \
5021 && (segment->p_type != PT_TLS \
5022 || (section->flags & SEC_THREAD_LOCAL)) \
5023 && (segment->p_type == PT_LOAD \
5024 || segment->p_type == PT_TLS \
5025 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5026 && (segment->p_type != PT_DYNAMIC \
5027 || SECTION_SIZE (section, segment) > 0 \
5028 || (segment->p_paddr \
5029 ? segment->p_paddr != section->lma \
5030 : segment->p_vaddr != section->vma) \
5031 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5033 && ! section->segment_mark)
5035 /* Returns TRUE iff seg1 starts after the end of seg2. */
5036 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5037 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5039 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5040 their VMA address ranges and their LMA address ranges overlap.
5041 It is possible to have overlapping VMA ranges without overlapping LMA
5042 ranges. RedBoot images for example can have both .data and .bss mapped
5043 to the same VMA range, but with the .data section mapped to a different
5045 #define SEGMENT_OVERLAPS(seg1, seg2) \
5046 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5047 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5048 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5049 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5051 /* Initialise the segment mark field. */
5052 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5053 section
->segment_mark
= FALSE
;
5055 /* Scan through the segments specified in the program header
5056 of the input BFD. For this first scan we look for overlaps
5057 in the loadable segments. These can be created by weird
5058 parameters to objcopy. Also, fix some solaris weirdness. */
5059 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5064 Elf_Internal_Phdr
*segment2
;
5066 if (segment
->p_type
== PT_INTERP
)
5067 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5068 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5070 /* Mininal change so that the normal section to segment
5071 assignment code will work. */
5072 segment
->p_vaddr
= section
->vma
;
5076 if (segment
->p_type
!= PT_LOAD
)
5079 /* Determine if this segment overlaps any previous segments. */
5080 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5082 bfd_signed_vma extra_length
;
5084 if (segment2
->p_type
!= PT_LOAD
5085 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5088 /* Merge the two segments together. */
5089 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5091 /* Extend SEGMENT2 to include SEGMENT and then delete
5094 SEGMENT_END (segment
, segment
->p_vaddr
)
5095 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5097 if (extra_length
> 0)
5099 segment2
->p_memsz
+= extra_length
;
5100 segment2
->p_filesz
+= extra_length
;
5103 segment
->p_type
= PT_NULL
;
5105 /* Since we have deleted P we must restart the outer loop. */
5107 segment
= elf_tdata (ibfd
)->phdr
;
5112 /* Extend SEGMENT to include SEGMENT2 and then delete
5115 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5116 - SEGMENT_END (segment
, segment
->p_vaddr
);
5118 if (extra_length
> 0)
5120 segment
->p_memsz
+= extra_length
;
5121 segment
->p_filesz
+= extra_length
;
5124 segment2
->p_type
= PT_NULL
;
5129 /* The second scan attempts to assign sections to segments. */
5130 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5134 unsigned int section_count
;
5135 asection
** sections
;
5136 asection
* output_section
;
5138 bfd_vma matching_lma
;
5139 bfd_vma suggested_lma
;
5143 if (segment
->p_type
== PT_NULL
)
5146 /* Compute how many sections might be placed into this segment. */
5147 for (section
= ibfd
->sections
, section_count
= 0;
5149 section
= section
->next
)
5150 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5153 /* Allocate a segment map big enough to contain
5154 all of the sections we have selected. */
5155 amt
= sizeof (struct elf_segment_map
);
5156 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5157 map
= bfd_alloc (obfd
, amt
);
5161 /* Initialise the fields of the segment map. Default to
5162 using the physical address of the segment in the input BFD. */
5164 map
->p_type
= segment
->p_type
;
5165 map
->p_flags
= segment
->p_flags
;
5166 map
->p_flags_valid
= 1;
5167 map
->p_paddr
= segment
->p_paddr
;
5168 map
->p_paddr_valid
= 1;
5170 /* Determine if this segment contains the ELF file header
5171 and if it contains the program headers themselves. */
5172 map
->includes_filehdr
= (segment
->p_offset
== 0
5173 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5175 map
->includes_phdrs
= 0;
5177 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5179 map
->includes_phdrs
=
5180 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5181 && (segment
->p_offset
+ segment
->p_filesz
5182 >= ((bfd_vma
) iehdr
->e_phoff
5183 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5185 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5186 phdr_included
= TRUE
;
5189 if (section_count
== 0)
5191 /* Special segments, such as the PT_PHDR segment, may contain
5192 no sections, but ordinary, loadable segments should contain
5193 something. They are allowed by the ELF spec however, so only
5194 a warning is produced. */
5195 if (segment
->p_type
== PT_LOAD
)
5196 (*_bfd_error_handler
)
5197 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5201 *pointer_to_map
= map
;
5202 pointer_to_map
= &map
->next
;
5207 /* Now scan the sections in the input BFD again and attempt
5208 to add their corresponding output sections to the segment map.
5209 The problem here is how to handle an output section which has
5210 been moved (ie had its LMA changed). There are four possibilities:
5212 1. None of the sections have been moved.
5213 In this case we can continue to use the segment LMA from the
5216 2. All of the sections have been moved by the same amount.
5217 In this case we can change the segment's LMA to match the LMA
5218 of the first section.
5220 3. Some of the sections have been moved, others have not.
5221 In this case those sections which have not been moved can be
5222 placed in the current segment which will have to have its size,
5223 and possibly its LMA changed, and a new segment or segments will
5224 have to be created to contain the other sections.
5226 4. The sections have been moved, but not by the same amount.
5227 In this case we can change the segment's LMA to match the LMA
5228 of the first section and we will have to create a new segment
5229 or segments to contain the other sections.
5231 In order to save time, we allocate an array to hold the section
5232 pointers that we are interested in. As these sections get assigned
5233 to a segment, they are removed from this array. */
5235 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5236 to work around this long long bug. */
5237 amt
= section_count
* sizeof (asection
*);
5238 sections
= bfd_malloc (amt
);
5239 if (sections
== NULL
)
5242 /* Step One: Scan for segment vs section LMA conflicts.
5243 Also add the sections to the section array allocated above.
5244 Also add the sections to the current segment. In the common
5245 case, where the sections have not been moved, this means that
5246 we have completely filled the segment, and there is nothing
5252 for (j
= 0, section
= ibfd
->sections
;
5254 section
= section
->next
)
5256 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5258 output_section
= section
->output_section
;
5260 sections
[j
++] = section
;
5262 /* The Solaris native linker always sets p_paddr to 0.
5263 We try to catch that case here, and set it to the
5264 correct value. Note - some backends require that
5265 p_paddr be left as zero. */
5266 if (segment
->p_paddr
== 0
5267 && segment
->p_vaddr
!= 0
5268 && (! bed
->want_p_paddr_set_to_zero
)
5270 && output_section
->lma
!= 0
5271 && (output_section
->vma
== (segment
->p_vaddr
5272 + (map
->includes_filehdr
5275 + (map
->includes_phdrs
5277 * iehdr
->e_phentsize
)
5279 map
->p_paddr
= segment
->p_vaddr
;
5281 /* Match up the physical address of the segment with the
5282 LMA address of the output section. */
5283 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5284 || IS_COREFILE_NOTE (segment
, section
)
5285 || (bed
->want_p_paddr_set_to_zero
&&
5286 IS_CONTAINED_BY_VMA (output_section
, segment
))
5289 if (matching_lma
== 0)
5290 matching_lma
= output_section
->lma
;
5292 /* We assume that if the section fits within the segment
5293 then it does not overlap any other section within that
5295 map
->sections
[isec
++] = output_section
;
5297 else if (suggested_lma
== 0)
5298 suggested_lma
= output_section
->lma
;
5302 BFD_ASSERT (j
== section_count
);
5304 /* Step Two: Adjust the physical address of the current segment,
5306 if (isec
== section_count
)
5308 /* All of the sections fitted within the segment as currently
5309 specified. This is the default case. Add the segment to
5310 the list of built segments and carry on to process the next
5311 program header in the input BFD. */
5312 map
->count
= section_count
;
5313 *pointer_to_map
= map
;
5314 pointer_to_map
= &map
->next
;
5321 if (matching_lma
!= 0)
5323 /* At least one section fits inside the current segment.
5324 Keep it, but modify its physical address to match the
5325 LMA of the first section that fitted. */
5326 map
->p_paddr
= matching_lma
;
5330 /* None of the sections fitted inside the current segment.
5331 Change the current segment's physical address to match
5332 the LMA of the first section. */
5333 map
->p_paddr
= suggested_lma
;
5336 /* Offset the segment physical address from the lma
5337 to allow for space taken up by elf headers. */
5338 if (map
->includes_filehdr
)
5339 map
->p_paddr
-= iehdr
->e_ehsize
;
5341 if (map
->includes_phdrs
)
5343 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5345 /* iehdr->e_phnum is just an estimate of the number
5346 of program headers that we will need. Make a note
5347 here of the number we used and the segment we chose
5348 to hold these headers, so that we can adjust the
5349 offset when we know the correct value. */
5350 phdr_adjust_num
= iehdr
->e_phnum
;
5351 phdr_adjust_seg
= map
;
5355 /* Step Three: Loop over the sections again, this time assigning
5356 those that fit to the current segment and removing them from the
5357 sections array; but making sure not to leave large gaps. Once all
5358 possible sections have been assigned to the current segment it is
5359 added to the list of built segments and if sections still remain
5360 to be assigned, a new segment is constructed before repeating
5368 /* Fill the current segment with sections that fit. */
5369 for (j
= 0; j
< section_count
; j
++)
5371 section
= sections
[j
];
5373 if (section
== NULL
)
5376 output_section
= section
->output_section
;
5378 BFD_ASSERT (output_section
!= NULL
);
5380 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5381 || IS_COREFILE_NOTE (segment
, section
))
5383 if (map
->count
== 0)
5385 /* If the first section in a segment does not start at
5386 the beginning of the segment, then something is
5388 if (output_section
->lma
!=
5390 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5391 + (map
->includes_phdrs
5392 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5398 asection
* prev_sec
;
5400 prev_sec
= map
->sections
[map
->count
- 1];
5402 /* If the gap between the end of the previous section
5403 and the start of this section is more than
5404 maxpagesize then we need to start a new segment. */
5405 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5407 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5408 || ((prev_sec
->lma
+ prev_sec
->size
)
5409 > output_section
->lma
))
5411 if (suggested_lma
== 0)
5412 suggested_lma
= output_section
->lma
;
5418 map
->sections
[map
->count
++] = output_section
;
5421 section
->segment_mark
= TRUE
;
5423 else if (suggested_lma
== 0)
5424 suggested_lma
= output_section
->lma
;
5427 BFD_ASSERT (map
->count
> 0);
5429 /* Add the current segment to the list of built segments. */
5430 *pointer_to_map
= map
;
5431 pointer_to_map
= &map
->next
;
5433 if (isec
< section_count
)
5435 /* We still have not allocated all of the sections to
5436 segments. Create a new segment here, initialise it
5437 and carry on looping. */
5438 amt
= sizeof (struct elf_segment_map
);
5439 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5440 map
= bfd_alloc (obfd
, amt
);
5447 /* Initialise the fields of the segment map. Set the physical
5448 physical address to the LMA of the first section that has
5449 not yet been assigned. */
5451 map
->p_type
= segment
->p_type
;
5452 map
->p_flags
= segment
->p_flags
;
5453 map
->p_flags_valid
= 1;
5454 map
->p_paddr
= suggested_lma
;
5455 map
->p_paddr_valid
= 1;
5456 map
->includes_filehdr
= 0;
5457 map
->includes_phdrs
= 0;
5460 while (isec
< section_count
);
5465 /* The Solaris linker creates program headers in which all the
5466 p_paddr fields are zero. When we try to objcopy or strip such a
5467 file, we get confused. Check for this case, and if we find it
5468 reset the p_paddr_valid fields. */
5469 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5470 if (map
->p_paddr
!= 0)
5473 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5474 map
->p_paddr_valid
= 0;
5476 elf_tdata (obfd
)->segment_map
= map_first
;
5478 /* If we had to estimate the number of program headers that were
5479 going to be needed, then check our estimate now and adjust
5480 the offset if necessary. */
5481 if (phdr_adjust_seg
!= NULL
)
5485 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5488 if (count
> phdr_adjust_num
)
5489 phdr_adjust_seg
->p_paddr
5490 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5495 #undef IS_CONTAINED_BY_VMA
5496 #undef IS_CONTAINED_BY_LMA
5497 #undef IS_COREFILE_NOTE
5498 #undef IS_SOLARIS_PT_INTERP
5499 #undef INCLUDE_SECTION_IN_SEGMENT
5500 #undef SEGMENT_AFTER_SEGMENT
5501 #undef SEGMENT_OVERLAPS
5505 /* Copy private section information. This copies over the entsize
5506 field, and sometimes the info field. */
5509 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5514 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5516 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5517 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5520 ihdr
= &elf_section_data (isec
)->this_hdr
;
5521 ohdr
= &elf_section_data (osec
)->this_hdr
;
5523 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5525 if (ihdr
->sh_type
== SHT_SYMTAB
5526 || ihdr
->sh_type
== SHT_DYNSYM
5527 || ihdr
->sh_type
== SHT_GNU_verneed
5528 || ihdr
->sh_type
== SHT_GNU_verdef
)
5529 ohdr
->sh_info
= ihdr
->sh_info
;
5531 /* Set things up for objcopy. The output SHT_GROUP section will
5532 have its elf_next_in_group pointing back to the input group
5533 members. Ignore linker created group section. See
5534 elfNN_ia64_object_p in elfxx-ia64.c. */
5535 if (elf_sec_group (isec
) == NULL
5536 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5538 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5539 elf_group_name (osec
) = elf_group_name (isec
);
5542 osec
->use_rela_p
= isec
->use_rela_p
;
5547 /* Copy private header information. */
5550 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5552 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5553 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5556 /* Copy over private BFD data if it has not already been copied.
5557 This must be done here, rather than in the copy_private_bfd_data
5558 entry point, because the latter is called after the section
5559 contents have been set, which means that the program headers have
5560 already been worked out. */
5561 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5563 if (! copy_private_bfd_data (ibfd
, obfd
))
5570 /* Copy private symbol information. If this symbol is in a section
5571 which we did not map into a BFD section, try to map the section
5572 index correctly. We use special macro definitions for the mapped
5573 section indices; these definitions are interpreted by the
5574 swap_out_syms function. */
5576 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5577 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5578 #define MAP_STRTAB (SHN_HIOS + 3)
5579 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5580 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5583 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5588 elf_symbol_type
*isym
, *osym
;
5590 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5591 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5594 isym
= elf_symbol_from (ibfd
, isymarg
);
5595 osym
= elf_symbol_from (obfd
, osymarg
);
5599 && bfd_is_abs_section (isym
->symbol
.section
))
5603 shndx
= isym
->internal_elf_sym
.st_shndx
;
5604 if (shndx
== elf_onesymtab (ibfd
))
5605 shndx
= MAP_ONESYMTAB
;
5606 else if (shndx
== elf_dynsymtab (ibfd
))
5607 shndx
= MAP_DYNSYMTAB
;
5608 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5610 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5611 shndx
= MAP_SHSTRTAB
;
5612 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5613 shndx
= MAP_SYM_SHNDX
;
5614 osym
->internal_elf_sym
.st_shndx
= shndx
;
5620 /* Swap out the symbols. */
5623 swap_out_syms (bfd
*abfd
,
5624 struct bfd_strtab_hash
**sttp
,
5627 const struct elf_backend_data
*bed
;
5630 struct bfd_strtab_hash
*stt
;
5631 Elf_Internal_Shdr
*symtab_hdr
;
5632 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5633 Elf_Internal_Shdr
*symstrtab_hdr
;
5634 bfd_byte
*outbound_syms
;
5635 bfd_byte
*outbound_shndx
;
5638 bfd_boolean name_local_sections
;
5640 if (!elf_map_symbols (abfd
))
5643 /* Dump out the symtabs. */
5644 stt
= _bfd_elf_stringtab_init ();
5648 bed
= get_elf_backend_data (abfd
);
5649 symcount
= bfd_get_symcount (abfd
);
5650 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5651 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5652 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5653 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5654 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5655 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5657 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5658 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5660 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5661 outbound_syms
= bfd_alloc (abfd
, amt
);
5662 if (outbound_syms
== NULL
)
5664 _bfd_stringtab_free (stt
);
5667 symtab_hdr
->contents
= outbound_syms
;
5669 outbound_shndx
= NULL
;
5670 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5671 if (symtab_shndx_hdr
->sh_name
!= 0)
5673 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5674 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5675 if (outbound_shndx
== NULL
)
5677 _bfd_stringtab_free (stt
);
5681 symtab_shndx_hdr
->contents
= outbound_shndx
;
5682 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5683 symtab_shndx_hdr
->sh_size
= amt
;
5684 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5685 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5688 /* Now generate the data (for "contents"). */
5690 /* Fill in zeroth symbol and swap it out. */
5691 Elf_Internal_Sym sym
;
5697 sym
.st_shndx
= SHN_UNDEF
;
5698 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5699 outbound_syms
+= bed
->s
->sizeof_sym
;
5700 if (outbound_shndx
!= NULL
)
5701 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5705 = (bed
->elf_backend_name_local_section_symbols
5706 && bed
->elf_backend_name_local_section_symbols (abfd
));
5708 syms
= bfd_get_outsymbols (abfd
);
5709 for (idx
= 0; idx
< symcount
; idx
++)
5711 Elf_Internal_Sym sym
;
5712 bfd_vma value
= syms
[idx
]->value
;
5713 elf_symbol_type
*type_ptr
;
5714 flagword flags
= syms
[idx
]->flags
;
5717 if (!name_local_sections
5718 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5720 /* Local section symbols have no name. */
5725 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5728 if (sym
.st_name
== (unsigned long) -1)
5730 _bfd_stringtab_free (stt
);
5735 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5737 if ((flags
& BSF_SECTION_SYM
) == 0
5738 && bfd_is_com_section (syms
[idx
]->section
))
5740 /* ELF common symbols put the alignment into the `value' field,
5741 and the size into the `size' field. This is backwards from
5742 how BFD handles it, so reverse it here. */
5743 sym
.st_size
= value
;
5744 if (type_ptr
== NULL
5745 || type_ptr
->internal_elf_sym
.st_value
== 0)
5746 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5748 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5749 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5750 (abfd
, syms
[idx
]->section
);
5754 asection
*sec
= syms
[idx
]->section
;
5757 if (sec
->output_section
)
5759 value
+= sec
->output_offset
;
5760 sec
= sec
->output_section
;
5763 /* Don't add in the section vma for relocatable output. */
5764 if (! relocatable_p
)
5766 sym
.st_value
= value
;
5767 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5769 if (bfd_is_abs_section (sec
)
5771 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5773 /* This symbol is in a real ELF section which we did
5774 not create as a BFD section. Undo the mapping done
5775 by copy_private_symbol_data. */
5776 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5780 shndx
= elf_onesymtab (abfd
);
5783 shndx
= elf_dynsymtab (abfd
);
5786 shndx
= elf_tdata (abfd
)->strtab_section
;
5789 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5792 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5800 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5806 /* Writing this would be a hell of a lot easier if
5807 we had some decent documentation on bfd, and
5808 knew what to expect of the library, and what to
5809 demand of applications. For example, it
5810 appears that `objcopy' might not set the
5811 section of a symbol to be a section that is
5812 actually in the output file. */
5813 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5816 _bfd_error_handler (_("\
5817 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5818 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5820 bfd_set_error (bfd_error_invalid_operation
);
5821 _bfd_stringtab_free (stt
);
5825 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5826 BFD_ASSERT (shndx
!= -1);
5830 sym
.st_shndx
= shndx
;
5833 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5835 else if ((flags
& BSF_FUNCTION
) != 0)
5837 else if ((flags
& BSF_OBJECT
) != 0)
5842 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5845 /* Processor-specific types. */
5846 if (type_ptr
!= NULL
5847 && bed
->elf_backend_get_symbol_type
)
5848 type
= ((*bed
->elf_backend_get_symbol_type
)
5849 (&type_ptr
->internal_elf_sym
, type
));
5851 if (flags
& BSF_SECTION_SYM
)
5853 if (flags
& BSF_GLOBAL
)
5854 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5856 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5858 else if (bfd_is_com_section (syms
[idx
]->section
))
5859 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5860 else if (bfd_is_und_section (syms
[idx
]->section
))
5861 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5865 else if (flags
& BSF_FILE
)
5866 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5869 int bind
= STB_LOCAL
;
5871 if (flags
& BSF_LOCAL
)
5873 else if (flags
& BSF_WEAK
)
5875 else if (flags
& BSF_GLOBAL
)
5878 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5881 if (type_ptr
!= NULL
)
5882 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5886 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5887 outbound_syms
+= bed
->s
->sizeof_sym
;
5888 if (outbound_shndx
!= NULL
)
5889 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5893 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5894 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5896 symstrtab_hdr
->sh_flags
= 0;
5897 symstrtab_hdr
->sh_addr
= 0;
5898 symstrtab_hdr
->sh_entsize
= 0;
5899 symstrtab_hdr
->sh_link
= 0;
5900 symstrtab_hdr
->sh_info
= 0;
5901 symstrtab_hdr
->sh_addralign
= 1;
5906 /* Return the number of bytes required to hold the symtab vector.
5908 Note that we base it on the count plus 1, since we will null terminate
5909 the vector allocated based on this size. However, the ELF symbol table
5910 always has a dummy entry as symbol #0, so it ends up even. */
5913 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5917 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5919 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5920 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5922 symtab_size
-= sizeof (asymbol
*);
5928 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5932 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5934 if (elf_dynsymtab (abfd
) == 0)
5936 bfd_set_error (bfd_error_invalid_operation
);
5940 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5941 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5943 symtab_size
-= sizeof (asymbol
*);
5949 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5952 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5955 /* Canonicalize the relocs. */
5958 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5965 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5967 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5970 tblptr
= section
->relocation
;
5971 for (i
= 0; i
< section
->reloc_count
; i
++)
5972 *relptr
++ = tblptr
++;
5976 return section
->reloc_count
;
5980 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5982 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5983 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5986 bfd_get_symcount (abfd
) = symcount
;
5991 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5992 asymbol
**allocation
)
5994 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5995 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5998 bfd_get_dynamic_symcount (abfd
) = symcount
;
6002 /* Return the size required for the dynamic reloc entries. Any loadable
6003 section that was actually installed in the BFD, and has type SHT_REL
6004 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6005 dynamic reloc section. */
6008 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6013 if (elf_dynsymtab (abfd
) == 0)
6015 bfd_set_error (bfd_error_invalid_operation
);
6019 ret
= sizeof (arelent
*);
6020 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6021 if ((s
->flags
& SEC_LOAD
) != 0
6022 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6023 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6024 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6025 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6026 * sizeof (arelent
*));
6031 /* Canonicalize the dynamic relocation entries. Note that we return the
6032 dynamic relocations as a single block, although they are actually
6033 associated with particular sections; the interface, which was
6034 designed for SunOS style shared libraries, expects that there is only
6035 one set of dynamic relocs. Any loadable section that was actually
6036 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6037 dynamic symbol table, is considered to be a dynamic reloc section. */
6040 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6044 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6048 if (elf_dynsymtab (abfd
) == 0)
6050 bfd_set_error (bfd_error_invalid_operation
);
6054 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6056 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6058 if ((s
->flags
& SEC_LOAD
) != 0
6059 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6060 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6061 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6066 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6068 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6070 for (i
= 0; i
< count
; i
++)
6081 /* Read in the version information. */
6084 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6086 bfd_byte
*contents
= NULL
;
6088 unsigned int freeidx
= 0;
6090 if (elf_dynverref (abfd
) != 0)
6092 Elf_Internal_Shdr
*hdr
;
6093 Elf_External_Verneed
*everneed
;
6094 Elf_Internal_Verneed
*iverneed
;
6097 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6099 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6100 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6101 if (elf_tdata (abfd
)->verref
== NULL
)
6104 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6106 contents
= bfd_malloc (hdr
->sh_size
);
6107 if (contents
== NULL
)
6109 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6110 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6113 everneed
= (Elf_External_Verneed
*) contents
;
6114 iverneed
= elf_tdata (abfd
)->verref
;
6115 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6117 Elf_External_Vernaux
*evernaux
;
6118 Elf_Internal_Vernaux
*ivernaux
;
6121 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6123 iverneed
->vn_bfd
= abfd
;
6125 iverneed
->vn_filename
=
6126 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6128 if (iverneed
->vn_filename
== NULL
)
6131 amt
= iverneed
->vn_cnt
;
6132 amt
*= sizeof (Elf_Internal_Vernaux
);
6133 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6135 evernaux
= ((Elf_External_Vernaux
*)
6136 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6137 ivernaux
= iverneed
->vn_auxptr
;
6138 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6140 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6142 ivernaux
->vna_nodename
=
6143 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6144 ivernaux
->vna_name
);
6145 if (ivernaux
->vna_nodename
== NULL
)
6148 if (j
+ 1 < iverneed
->vn_cnt
)
6149 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6151 ivernaux
->vna_nextptr
= NULL
;
6153 evernaux
= ((Elf_External_Vernaux
*)
6154 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6156 if (ivernaux
->vna_other
> freeidx
)
6157 freeidx
= ivernaux
->vna_other
;
6160 if (i
+ 1 < hdr
->sh_info
)
6161 iverneed
->vn_nextref
= iverneed
+ 1;
6163 iverneed
->vn_nextref
= NULL
;
6165 everneed
= ((Elf_External_Verneed
*)
6166 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6173 if (elf_dynverdef (abfd
) != 0)
6175 Elf_Internal_Shdr
*hdr
;
6176 Elf_External_Verdef
*everdef
;
6177 Elf_Internal_Verdef
*iverdef
;
6178 Elf_Internal_Verdef
*iverdefarr
;
6179 Elf_Internal_Verdef iverdefmem
;
6181 unsigned int maxidx
;
6183 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6185 contents
= bfd_malloc (hdr
->sh_size
);
6186 if (contents
== NULL
)
6188 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6189 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6192 /* We know the number of entries in the section but not the maximum
6193 index. Therefore we have to run through all entries and find
6195 everdef
= (Elf_External_Verdef
*) contents
;
6197 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6199 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6201 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6202 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6204 everdef
= ((Elf_External_Verdef
*)
6205 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6208 if (default_imported_symver
)
6210 if (freeidx
> maxidx
)
6215 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6216 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6217 if (elf_tdata (abfd
)->verdef
== NULL
)
6220 elf_tdata (abfd
)->cverdefs
= maxidx
;
6222 everdef
= (Elf_External_Verdef
*) contents
;
6223 iverdefarr
= elf_tdata (abfd
)->verdef
;
6224 for (i
= 0; i
< hdr
->sh_info
; i
++)
6226 Elf_External_Verdaux
*everdaux
;
6227 Elf_Internal_Verdaux
*iverdaux
;
6230 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6232 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6233 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6235 iverdef
->vd_bfd
= abfd
;
6237 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6238 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6239 if (iverdef
->vd_auxptr
== NULL
)
6242 everdaux
= ((Elf_External_Verdaux
*)
6243 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6244 iverdaux
= iverdef
->vd_auxptr
;
6245 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6247 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6249 iverdaux
->vda_nodename
=
6250 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6251 iverdaux
->vda_name
);
6252 if (iverdaux
->vda_nodename
== NULL
)
6255 if (j
+ 1 < iverdef
->vd_cnt
)
6256 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6258 iverdaux
->vda_nextptr
= NULL
;
6260 everdaux
= ((Elf_External_Verdaux
*)
6261 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6264 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6266 if (i
+ 1 < hdr
->sh_info
)
6267 iverdef
->vd_nextdef
= iverdef
+ 1;
6269 iverdef
->vd_nextdef
= NULL
;
6271 everdef
= ((Elf_External_Verdef
*)
6272 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6278 else if (default_imported_symver
)
6285 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6286 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6287 if (elf_tdata (abfd
)->verdef
== NULL
)
6290 elf_tdata (abfd
)->cverdefs
= freeidx
;
6293 /* Create a default version based on the soname. */
6294 if (default_imported_symver
)
6296 Elf_Internal_Verdef
*iverdef
;
6297 Elf_Internal_Verdaux
*iverdaux
;
6299 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6301 iverdef
->vd_version
= VER_DEF_CURRENT
;
6302 iverdef
->vd_flags
= 0;
6303 iverdef
->vd_ndx
= freeidx
;
6304 iverdef
->vd_cnt
= 1;
6306 iverdef
->vd_bfd
= abfd
;
6308 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6309 if (iverdef
->vd_nodename
== NULL
)
6311 iverdef
->vd_nextdef
= NULL
;
6312 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6313 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6315 iverdaux
= iverdef
->vd_auxptr
;
6316 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6317 iverdaux
->vda_nextptr
= NULL
;
6323 if (contents
!= NULL
)
6329 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6331 elf_symbol_type
*newsym
;
6332 bfd_size_type amt
= sizeof (elf_symbol_type
);
6334 newsym
= bfd_zalloc (abfd
, amt
);
6339 newsym
->symbol
.the_bfd
= abfd
;
6340 return &newsym
->symbol
;
6345 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6349 bfd_symbol_info (symbol
, ret
);
6352 /* Return whether a symbol name implies a local symbol. Most targets
6353 use this function for the is_local_label_name entry point, but some
6357 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6360 /* Normal local symbols start with ``.L''. */
6361 if (name
[0] == '.' && name
[1] == 'L')
6364 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6365 DWARF debugging symbols starting with ``..''. */
6366 if (name
[0] == '.' && name
[1] == '.')
6369 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6370 emitting DWARF debugging output. I suspect this is actually a
6371 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6372 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6373 underscore to be emitted on some ELF targets). For ease of use,
6374 we treat such symbols as local. */
6375 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6382 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6383 asymbol
*symbol ATTRIBUTE_UNUSED
)
6390 _bfd_elf_set_arch_mach (bfd
*abfd
,
6391 enum bfd_architecture arch
,
6392 unsigned long machine
)
6394 /* If this isn't the right architecture for this backend, and this
6395 isn't the generic backend, fail. */
6396 if (arch
!= get_elf_backend_data (abfd
)->arch
6397 && arch
!= bfd_arch_unknown
6398 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6401 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6404 /* Find the function to a particular section and offset,
6405 for error reporting. */
6408 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6412 const char **filename_ptr
,
6413 const char **functionname_ptr
)
6415 const char *filename
;
6416 asymbol
*func
, *file
;
6419 /* ??? Given multiple file symbols, it is impossible to reliably
6420 choose the right file name for global symbols. File symbols are
6421 local symbols, and thus all file symbols must sort before any
6422 global symbols. The ELF spec may be interpreted to say that a
6423 file symbol must sort before other local symbols, but currently
6424 ld -r doesn't do this. So, for ld -r output, it is possible to
6425 make a better choice of file name for local symbols by ignoring
6426 file symbols appearing after a given local symbol. */
6427 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6433 state
= nothing_seen
;
6435 for (p
= symbols
; *p
!= NULL
; p
++)
6439 q
= (elf_symbol_type
*) *p
;
6441 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6447 if (state
== symbol_seen
)
6448 state
= file_after_symbol_seen
;
6454 if (bfd_get_section (&q
->symbol
) == section
6455 && q
->symbol
.value
>= low_func
6456 && q
->symbol
.value
<= offset
)
6458 func
= (asymbol
*) q
;
6459 low_func
= q
->symbol
.value
;
6462 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6463 && state
== file_after_symbol_seen
)
6466 filename
= bfd_asymbol_name (file
);
6470 if (state
== nothing_seen
)
6471 state
= symbol_seen
;
6478 *filename_ptr
= filename
;
6479 if (functionname_ptr
)
6480 *functionname_ptr
= bfd_asymbol_name (func
);
6485 /* Find the nearest line to a particular section and offset,
6486 for error reporting. */
6489 _bfd_elf_find_nearest_line (bfd
*abfd
,
6493 const char **filename_ptr
,
6494 const char **functionname_ptr
,
6495 unsigned int *line_ptr
)
6499 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6500 filename_ptr
, functionname_ptr
,
6503 if (!*functionname_ptr
)
6504 elf_find_function (abfd
, section
, symbols
, offset
,
6505 *filename_ptr
? NULL
: filename_ptr
,
6511 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6512 filename_ptr
, functionname_ptr
,
6514 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6516 if (!*functionname_ptr
)
6517 elf_find_function (abfd
, section
, symbols
, offset
,
6518 *filename_ptr
? NULL
: filename_ptr
,
6524 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6525 &found
, filename_ptr
,
6526 functionname_ptr
, line_ptr
,
6527 &elf_tdata (abfd
)->line_info
))
6529 if (found
&& (*functionname_ptr
|| *line_ptr
))
6532 if (symbols
== NULL
)
6535 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6536 filename_ptr
, functionname_ptr
))
6544 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6548 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6550 ret
+= get_program_header_size (abfd
);
6555 _bfd_elf_set_section_contents (bfd
*abfd
,
6557 const void *location
,
6559 bfd_size_type count
)
6561 Elf_Internal_Shdr
*hdr
;
6564 if (! abfd
->output_has_begun
6565 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6568 hdr
= &elf_section_data (section
)->this_hdr
;
6569 pos
= hdr
->sh_offset
+ offset
;
6570 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6571 || bfd_bwrite (location
, count
, abfd
) != count
)
6578 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6579 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6580 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6585 /* Try to convert a non-ELF reloc into an ELF one. */
6588 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6590 /* Check whether we really have an ELF howto. */
6592 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6594 bfd_reloc_code_real_type code
;
6595 reloc_howto_type
*howto
;
6597 /* Alien reloc: Try to determine its type to replace it with an
6598 equivalent ELF reloc. */
6600 if (areloc
->howto
->pc_relative
)
6602 switch (areloc
->howto
->bitsize
)
6605 code
= BFD_RELOC_8_PCREL
;
6608 code
= BFD_RELOC_12_PCREL
;
6611 code
= BFD_RELOC_16_PCREL
;
6614 code
= BFD_RELOC_24_PCREL
;
6617 code
= BFD_RELOC_32_PCREL
;
6620 code
= BFD_RELOC_64_PCREL
;
6626 howto
= bfd_reloc_type_lookup (abfd
, code
);
6628 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6630 if (howto
->pcrel_offset
)
6631 areloc
->addend
+= areloc
->address
;
6633 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6638 switch (areloc
->howto
->bitsize
)
6644 code
= BFD_RELOC_14
;
6647 code
= BFD_RELOC_16
;
6650 code
= BFD_RELOC_26
;
6653 code
= BFD_RELOC_32
;
6656 code
= BFD_RELOC_64
;
6662 howto
= bfd_reloc_type_lookup (abfd
, code
);
6666 areloc
->howto
= howto
;
6674 (*_bfd_error_handler
)
6675 (_("%B: unsupported relocation type %s"),
6676 abfd
, areloc
->howto
->name
);
6677 bfd_set_error (bfd_error_bad_value
);
6682 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6684 if (bfd_get_format (abfd
) == bfd_object
)
6686 if (elf_shstrtab (abfd
) != NULL
)
6687 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6690 return _bfd_generic_close_and_cleanup (abfd
);
6693 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6694 in the relocation's offset. Thus we cannot allow any sort of sanity
6695 range-checking to interfere. There is nothing else to do in processing
6698 bfd_reloc_status_type
6699 _bfd_elf_rel_vtable_reloc_fn
6700 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6701 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6702 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6703 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6705 return bfd_reloc_ok
;
6708 /* Elf core file support. Much of this only works on native
6709 toolchains, since we rely on knowing the
6710 machine-dependent procfs structure in order to pick
6711 out details about the corefile. */
6713 #ifdef HAVE_SYS_PROCFS_H
6714 # include <sys/procfs.h>
6717 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6720 elfcore_make_pid (bfd
*abfd
)
6722 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6723 + (elf_tdata (abfd
)->core_pid
));
6726 /* If there isn't a section called NAME, make one, using
6727 data from SECT. Note, this function will generate a
6728 reference to NAME, so you shouldn't deallocate or
6732 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6736 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6739 sect2
= bfd_make_section (abfd
, name
);
6743 sect2
->size
= sect
->size
;
6744 sect2
->filepos
= sect
->filepos
;
6745 sect2
->flags
= sect
->flags
;
6746 sect2
->alignment_power
= sect
->alignment_power
;
6750 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6751 actually creates up to two pseudosections:
6752 - For the single-threaded case, a section named NAME, unless
6753 such a section already exists.
6754 - For the multi-threaded case, a section named "NAME/PID", where
6755 PID is elfcore_make_pid (abfd).
6756 Both pseudosections have identical contents. */
6758 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6764 char *threaded_name
;
6768 /* Build the section name. */
6770 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6771 len
= strlen (buf
) + 1;
6772 threaded_name
= bfd_alloc (abfd
, len
);
6773 if (threaded_name
== NULL
)
6775 memcpy (threaded_name
, buf
, len
);
6777 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6781 sect
->filepos
= filepos
;
6782 sect
->flags
= SEC_HAS_CONTENTS
;
6783 sect
->alignment_power
= 2;
6785 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6788 /* prstatus_t exists on:
6790 linux 2.[01] + glibc
6794 #if defined (HAVE_PRSTATUS_T)
6797 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6802 if (note
->descsz
== sizeof (prstatus_t
))
6806 size
= sizeof (prstat
.pr_reg
);
6807 offset
= offsetof (prstatus_t
, pr_reg
);
6808 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6810 /* Do not overwrite the core signal if it
6811 has already been set by another thread. */
6812 if (elf_tdata (abfd
)->core_signal
== 0)
6813 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6814 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6816 /* pr_who exists on:
6819 pr_who doesn't exist on:
6822 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6823 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6826 #if defined (HAVE_PRSTATUS32_T)
6827 else if (note
->descsz
== sizeof (prstatus32_t
))
6829 /* 64-bit host, 32-bit corefile */
6830 prstatus32_t prstat
;
6832 size
= sizeof (prstat
.pr_reg
);
6833 offset
= offsetof (prstatus32_t
, pr_reg
);
6834 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6836 /* Do not overwrite the core signal if it
6837 has already been set by another thread. */
6838 if (elf_tdata (abfd
)->core_signal
== 0)
6839 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6840 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6842 /* pr_who exists on:
6845 pr_who doesn't exist on:
6848 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6849 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6852 #endif /* HAVE_PRSTATUS32_T */
6855 /* Fail - we don't know how to handle any other
6856 note size (ie. data object type). */
6860 /* Make a ".reg/999" section and a ".reg" section. */
6861 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6862 size
, note
->descpos
+ offset
);
6864 #endif /* defined (HAVE_PRSTATUS_T) */
6866 /* Create a pseudosection containing the exact contents of NOTE. */
6868 elfcore_make_note_pseudosection (bfd
*abfd
,
6870 Elf_Internal_Note
*note
)
6872 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6873 note
->descsz
, note
->descpos
);
6876 /* There isn't a consistent prfpregset_t across platforms,
6877 but it doesn't matter, because we don't have to pick this
6878 data structure apart. */
6881 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6883 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6886 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6887 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6891 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6893 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6896 #if defined (HAVE_PRPSINFO_T)
6897 typedef prpsinfo_t elfcore_psinfo_t
;
6898 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6899 typedef prpsinfo32_t elfcore_psinfo32_t
;
6903 #if defined (HAVE_PSINFO_T)
6904 typedef psinfo_t elfcore_psinfo_t
;
6905 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6906 typedef psinfo32_t elfcore_psinfo32_t
;
6910 /* return a malloc'ed copy of a string at START which is at
6911 most MAX bytes long, possibly without a terminating '\0'.
6912 the copy will always have a terminating '\0'. */
6915 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6918 char *end
= memchr (start
, '\0', max
);
6926 dups
= bfd_alloc (abfd
, len
+ 1);
6930 memcpy (dups
, start
, len
);
6936 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6938 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6940 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6942 elfcore_psinfo_t psinfo
;
6944 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6946 elf_tdata (abfd
)->core_program
6947 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6948 sizeof (psinfo
.pr_fname
));
6950 elf_tdata (abfd
)->core_command
6951 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6952 sizeof (psinfo
.pr_psargs
));
6954 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6955 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6957 /* 64-bit host, 32-bit corefile */
6958 elfcore_psinfo32_t psinfo
;
6960 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6962 elf_tdata (abfd
)->core_program
6963 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6964 sizeof (psinfo
.pr_fname
));
6966 elf_tdata (abfd
)->core_command
6967 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6968 sizeof (psinfo
.pr_psargs
));
6974 /* Fail - we don't know how to handle any other
6975 note size (ie. data object type). */
6979 /* Note that for some reason, a spurious space is tacked
6980 onto the end of the args in some (at least one anyway)
6981 implementations, so strip it off if it exists. */
6984 char *command
= elf_tdata (abfd
)->core_command
;
6985 int n
= strlen (command
);
6987 if (0 < n
&& command
[n
- 1] == ' ')
6988 command
[n
- 1] = '\0';
6993 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6995 #if defined (HAVE_PSTATUS_T)
6997 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6999 if (note
->descsz
== sizeof (pstatus_t
)
7000 #if defined (HAVE_PXSTATUS_T)
7001 || note
->descsz
== sizeof (pxstatus_t
)
7007 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7009 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7011 #if defined (HAVE_PSTATUS32_T)
7012 else if (note
->descsz
== sizeof (pstatus32_t
))
7014 /* 64-bit host, 32-bit corefile */
7017 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7019 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7022 /* Could grab some more details from the "representative"
7023 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7024 NT_LWPSTATUS note, presumably. */
7028 #endif /* defined (HAVE_PSTATUS_T) */
7030 #if defined (HAVE_LWPSTATUS_T)
7032 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7034 lwpstatus_t lwpstat
;
7040 if (note
->descsz
!= sizeof (lwpstat
)
7041 #if defined (HAVE_LWPXSTATUS_T)
7042 && note
->descsz
!= sizeof (lwpxstatus_t
)
7047 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7049 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7050 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7052 /* Make a ".reg/999" section. */
7054 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7055 len
= strlen (buf
) + 1;
7056 name
= bfd_alloc (abfd
, len
);
7059 memcpy (name
, buf
, len
);
7061 sect
= bfd_make_section_anyway (abfd
, name
);
7065 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7066 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7067 sect
->filepos
= note
->descpos
7068 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7071 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7072 sect
->size
= sizeof (lwpstat
.pr_reg
);
7073 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7076 sect
->flags
= SEC_HAS_CONTENTS
;
7077 sect
->alignment_power
= 2;
7079 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7082 /* Make a ".reg2/999" section */
7084 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7085 len
= strlen (buf
) + 1;
7086 name
= bfd_alloc (abfd
, len
);
7089 memcpy (name
, buf
, len
);
7091 sect
= bfd_make_section_anyway (abfd
, name
);
7095 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7096 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7097 sect
->filepos
= note
->descpos
7098 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7101 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7102 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7103 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7106 sect
->flags
= SEC_HAS_CONTENTS
;
7107 sect
->alignment_power
= 2;
7109 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7111 #endif /* defined (HAVE_LWPSTATUS_T) */
7113 #if defined (HAVE_WIN32_PSTATUS_T)
7115 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7121 win32_pstatus_t pstatus
;
7123 if (note
->descsz
< sizeof (pstatus
))
7126 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7128 switch (pstatus
.data_type
)
7130 case NOTE_INFO_PROCESS
:
7131 /* FIXME: need to add ->core_command. */
7132 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7133 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7136 case NOTE_INFO_THREAD
:
7137 /* Make a ".reg/999" section. */
7138 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7140 len
= strlen (buf
) + 1;
7141 name
= bfd_alloc (abfd
, len
);
7145 memcpy (name
, buf
, len
);
7147 sect
= bfd_make_section_anyway (abfd
, name
);
7151 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7152 sect
->filepos
= (note
->descpos
7153 + offsetof (struct win32_pstatus
,
7154 data
.thread_info
.thread_context
));
7155 sect
->flags
= SEC_HAS_CONTENTS
;
7156 sect
->alignment_power
= 2;
7158 if (pstatus
.data
.thread_info
.is_active_thread
)
7159 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7163 case NOTE_INFO_MODULE
:
7164 /* Make a ".module/xxxxxxxx" section. */
7165 sprintf (buf
, ".module/%08lx",
7166 (long) pstatus
.data
.module_info
.base_address
);
7168 len
= strlen (buf
) + 1;
7169 name
= bfd_alloc (abfd
, len
);
7173 memcpy (name
, buf
, len
);
7175 sect
= bfd_make_section_anyway (abfd
, name
);
7180 sect
->size
= note
->descsz
;
7181 sect
->filepos
= note
->descpos
;
7182 sect
->flags
= SEC_HAS_CONTENTS
;
7183 sect
->alignment_power
= 2;
7192 #endif /* HAVE_WIN32_PSTATUS_T */
7195 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7197 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7205 if (bed
->elf_backend_grok_prstatus
)
7206 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7208 #if defined (HAVE_PRSTATUS_T)
7209 return elfcore_grok_prstatus (abfd
, note
);
7214 #if defined (HAVE_PSTATUS_T)
7216 return elfcore_grok_pstatus (abfd
, note
);
7219 #if defined (HAVE_LWPSTATUS_T)
7221 return elfcore_grok_lwpstatus (abfd
, note
);
7224 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7225 return elfcore_grok_prfpreg (abfd
, note
);
7227 #if defined (HAVE_WIN32_PSTATUS_T)
7228 case NT_WIN32PSTATUS
:
7229 return elfcore_grok_win32pstatus (abfd
, note
);
7232 case NT_PRXFPREG
: /* Linux SSE extension */
7233 if (note
->namesz
== 6
7234 && strcmp (note
->namedata
, "LINUX") == 0)
7235 return elfcore_grok_prxfpreg (abfd
, note
);
7241 if (bed
->elf_backend_grok_psinfo
)
7242 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7244 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7245 return elfcore_grok_psinfo (abfd
, note
);
7252 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7256 sect
->size
= note
->descsz
;
7257 sect
->filepos
= note
->descpos
;
7258 sect
->flags
= SEC_HAS_CONTENTS
;
7259 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7267 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7271 cp
= strchr (note
->namedata
, '@');
7274 *lwpidp
= atoi(cp
+ 1);
7281 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7284 /* Signal number at offset 0x08. */
7285 elf_tdata (abfd
)->core_signal
7286 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7288 /* Process ID at offset 0x50. */
7289 elf_tdata (abfd
)->core_pid
7290 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7292 /* Command name at 0x7c (max 32 bytes, including nul). */
7293 elf_tdata (abfd
)->core_command
7294 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7296 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7301 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7305 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7306 elf_tdata (abfd
)->core_lwpid
= lwp
;
7308 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7310 /* NetBSD-specific core "procinfo". Note that we expect to
7311 find this note before any of the others, which is fine,
7312 since the kernel writes this note out first when it
7313 creates a core file. */
7315 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7318 /* As of Jan 2002 there are no other machine-independent notes
7319 defined for NetBSD core files. If the note type is less
7320 than the start of the machine-dependent note types, we don't
7323 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7327 switch (bfd_get_arch (abfd
))
7329 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7330 PT_GETFPREGS == mach+2. */
7332 case bfd_arch_alpha
:
7333 case bfd_arch_sparc
:
7336 case NT_NETBSDCORE_FIRSTMACH
+0:
7337 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7339 case NT_NETBSDCORE_FIRSTMACH
+2:
7340 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7346 /* On all other arch's, PT_GETREGS == mach+1 and
7347 PT_GETFPREGS == mach+3. */
7352 case NT_NETBSDCORE_FIRSTMACH
+1:
7353 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7355 case NT_NETBSDCORE_FIRSTMACH
+3:
7356 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7366 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7368 void *ddata
= note
->descdata
;
7375 /* nto_procfs_status 'pid' field is at offset 0. */
7376 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7378 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7379 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7381 /* nto_procfs_status 'flags' field is at offset 8. */
7382 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7384 /* nto_procfs_status 'what' field is at offset 14. */
7385 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7387 elf_tdata (abfd
)->core_signal
= sig
;
7388 elf_tdata (abfd
)->core_lwpid
= *tid
;
7391 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7392 do not come from signals so we make sure we set the current
7393 thread just in case. */
7394 if (flags
& 0x00000080)
7395 elf_tdata (abfd
)->core_lwpid
= *tid
;
7397 /* Make a ".qnx_core_status/%d" section. */
7398 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7400 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7405 sect
= bfd_make_section_anyway (abfd
, name
);
7409 sect
->size
= note
->descsz
;
7410 sect
->filepos
= note
->descpos
;
7411 sect
->flags
= SEC_HAS_CONTENTS
;
7412 sect
->alignment_power
= 2;
7414 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7418 elfcore_grok_nto_regs (bfd
*abfd
,
7419 Elf_Internal_Note
*note
,
7427 /* Make a "(base)/%d" section. */
7428 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7430 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7435 sect
= bfd_make_section_anyway (abfd
, name
);
7439 sect
->size
= note
->descsz
;
7440 sect
->filepos
= note
->descpos
;
7441 sect
->flags
= SEC_HAS_CONTENTS
;
7442 sect
->alignment_power
= 2;
7444 /* This is the current thread. */
7445 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7446 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7451 #define BFD_QNT_CORE_INFO 7
7452 #define BFD_QNT_CORE_STATUS 8
7453 #define BFD_QNT_CORE_GREG 9
7454 #define BFD_QNT_CORE_FPREG 10
7457 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7459 /* Every GREG section has a STATUS section before it. Store the
7460 tid from the previous call to pass down to the next gregs
7462 static pid_t tid
= 1;
7466 case BFD_QNT_CORE_INFO
:
7467 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7468 case BFD_QNT_CORE_STATUS
:
7469 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7470 case BFD_QNT_CORE_GREG
:
7471 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7472 case BFD_QNT_CORE_FPREG
:
7473 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7479 /* Function: elfcore_write_note
7486 size of data for note
7489 End of buffer containing note. */
7492 elfcore_write_note (bfd
*abfd
,
7500 Elf_External_Note
*xnp
;
7510 const struct elf_backend_data
*bed
;
7512 namesz
= strlen (name
) + 1;
7513 bed
= get_elf_backend_data (abfd
);
7514 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7517 newspace
= 12 + namesz
+ pad
+ size
;
7519 p
= realloc (buf
, *bufsiz
+ newspace
);
7521 *bufsiz
+= newspace
;
7522 xnp
= (Elf_External_Note
*) dest
;
7523 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7524 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7525 H_PUT_32 (abfd
, type
, xnp
->type
);
7529 memcpy (dest
, name
, namesz
);
7537 memcpy (dest
, input
, size
);
7541 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7543 elfcore_write_prpsinfo (bfd
*abfd
,
7550 char *note_name
= "CORE";
7552 #if defined (HAVE_PSINFO_T)
7554 note_type
= NT_PSINFO
;
7557 note_type
= NT_PRPSINFO
;
7560 memset (&data
, 0, sizeof (data
));
7561 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7562 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7563 return elfcore_write_note (abfd
, buf
, bufsiz
,
7564 note_name
, note_type
, &data
, sizeof (data
));
7566 #endif /* PSINFO_T or PRPSINFO_T */
7568 #if defined (HAVE_PRSTATUS_T)
7570 elfcore_write_prstatus (bfd
*abfd
,
7578 char *note_name
= "CORE";
7580 memset (&prstat
, 0, sizeof (prstat
));
7581 prstat
.pr_pid
= pid
;
7582 prstat
.pr_cursig
= cursig
;
7583 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7584 return elfcore_write_note (abfd
, buf
, bufsiz
,
7585 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7587 #endif /* HAVE_PRSTATUS_T */
7589 #if defined (HAVE_LWPSTATUS_T)
7591 elfcore_write_lwpstatus (bfd
*abfd
,
7598 lwpstatus_t lwpstat
;
7599 char *note_name
= "CORE";
7601 memset (&lwpstat
, 0, sizeof (lwpstat
));
7602 lwpstat
.pr_lwpid
= pid
>> 16;
7603 lwpstat
.pr_cursig
= cursig
;
7604 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7605 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7606 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7608 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7609 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7611 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7612 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7615 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7616 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7618 #endif /* HAVE_LWPSTATUS_T */
7620 #if defined (HAVE_PSTATUS_T)
7622 elfcore_write_pstatus (bfd
*abfd
,
7630 char *note_name
= "CORE";
7632 memset (&pstat
, 0, sizeof (pstat
));
7633 pstat
.pr_pid
= pid
& 0xffff;
7634 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7635 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7638 #endif /* HAVE_PSTATUS_T */
7641 elfcore_write_prfpreg (bfd
*abfd
,
7647 char *note_name
= "CORE";
7648 return elfcore_write_note (abfd
, buf
, bufsiz
,
7649 note_name
, NT_FPREGSET
, fpregs
, size
);
7653 elfcore_write_prxfpreg (bfd
*abfd
,
7656 const void *xfpregs
,
7659 char *note_name
= "LINUX";
7660 return elfcore_write_note (abfd
, buf
, bufsiz
,
7661 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7665 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7673 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7676 buf
= bfd_malloc (size
);
7680 if (bfd_bread (buf
, size
, abfd
) != size
)
7688 while (p
< buf
+ size
)
7690 /* FIXME: bad alignment assumption. */
7691 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7692 Elf_Internal_Note in
;
7694 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7696 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7697 in
.namedata
= xnp
->name
;
7699 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7700 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7701 in
.descpos
= offset
+ (in
.descdata
- buf
);
7703 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7705 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7708 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7710 if (! elfcore_grok_nto_note (abfd
, &in
))
7715 if (! elfcore_grok_note (abfd
, &in
))
7719 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7726 /* Providing external access to the ELF program header table. */
7728 /* Return an upper bound on the number of bytes required to store a
7729 copy of ABFD's program header table entries. Return -1 if an error
7730 occurs; bfd_get_error will return an appropriate code. */
7733 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7735 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7737 bfd_set_error (bfd_error_wrong_format
);
7741 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7744 /* Copy ABFD's program header table entries to *PHDRS. The entries
7745 will be stored as an array of Elf_Internal_Phdr structures, as
7746 defined in include/elf/internal.h. To find out how large the
7747 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7749 Return the number of program header table entries read, or -1 if an
7750 error occurs; bfd_get_error will return an appropriate code. */
7753 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7757 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7759 bfd_set_error (bfd_error_wrong_format
);
7763 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7764 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7765 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7771 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7774 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7776 i_ehdrp
= elf_elfheader (abfd
);
7777 if (i_ehdrp
== NULL
)
7778 sprintf_vma (buf
, value
);
7781 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7783 #if BFD_HOST_64BIT_LONG
7784 sprintf (buf
, "%016lx", value
);
7786 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7787 _bfd_int64_low (value
));
7791 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7794 sprintf_vma (buf
, value
);
7799 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7802 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7804 i_ehdrp
= elf_elfheader (abfd
);
7805 if (i_ehdrp
== NULL
)
7806 fprintf_vma ((FILE *) stream
, value
);
7809 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7811 #if BFD_HOST_64BIT_LONG
7812 fprintf ((FILE *) stream
, "%016lx", value
);
7814 fprintf ((FILE *) stream
, "%08lx%08lx",
7815 _bfd_int64_high (value
), _bfd_int64_low (value
));
7819 fprintf ((FILE *) stream
, "%08lx",
7820 (unsigned long) (value
& 0xffffffff));
7823 fprintf_vma ((FILE *) stream
, value
);
7827 enum elf_reloc_type_class
7828 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7830 return reloc_class_normal
;
7833 /* For RELA architectures, return the relocation value for a
7834 relocation against a local symbol. */
7837 _bfd_elf_rela_local_sym (bfd
*abfd
,
7838 Elf_Internal_Sym
*sym
,
7840 Elf_Internal_Rela
*rel
)
7842 asection
*sec
= *psec
;
7845 relocation
= (sec
->output_section
->vma
7846 + sec
->output_offset
7848 if ((sec
->flags
& SEC_MERGE
)
7849 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7850 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7853 _bfd_merged_section_offset (abfd
, psec
,
7854 elf_section_data (sec
)->sec_info
,
7855 sym
->st_value
+ rel
->r_addend
);
7858 /* If we have changed the section, and our original section is
7859 marked with SEC_EXCLUDE, it means that the original
7860 SEC_MERGE section has been completely subsumed in some
7861 other SEC_MERGE section. In this case, we need to leave
7862 some info around for --emit-relocs. */
7863 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7864 sec
->kept_section
= *psec
;
7867 rel
->r_addend
-= relocation
;
7868 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7874 _bfd_elf_rel_local_sym (bfd
*abfd
,
7875 Elf_Internal_Sym
*sym
,
7879 asection
*sec
= *psec
;
7881 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7882 return sym
->st_value
+ addend
;
7884 return _bfd_merged_section_offset (abfd
, psec
,
7885 elf_section_data (sec
)->sec_info
,
7886 sym
->st_value
+ addend
);
7890 _bfd_elf_section_offset (bfd
*abfd
,
7891 struct bfd_link_info
*info
,
7895 switch (sec
->sec_info_type
)
7897 case ELF_INFO_TYPE_STABS
:
7898 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7900 case ELF_INFO_TYPE_EH_FRAME
:
7901 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
7907 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7908 reconstruct an ELF file by reading the segments out of remote memory
7909 based on the ELF file header at EHDR_VMA and the ELF program headers it
7910 points to. If not null, *LOADBASEP is filled in with the difference
7911 between the VMAs from which the segments were read, and the VMAs the
7912 file headers (and hence BFD's idea of each section's VMA) put them at.
7914 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7915 remote memory at target address VMA into the local buffer at MYADDR; it
7916 should return zero on success or an `errno' code on failure. TEMPL must
7917 be a BFD for an ELF target with the word size and byte order found in
7918 the remote memory. */
7921 bfd_elf_bfd_from_remote_memory
7925 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
7927 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7928 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7932 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
7933 long symcount ATTRIBUTE_UNUSED
,
7934 asymbol
**syms ATTRIBUTE_UNUSED
,
7939 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7942 const char *relplt_name
;
7943 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7947 Elf_Internal_Shdr
*hdr
;
7953 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
7956 if (dynsymcount
<= 0)
7959 if (!bed
->plt_sym_val
)
7962 relplt_name
= bed
->relplt_name
;
7963 if (relplt_name
== NULL
)
7964 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7965 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7969 hdr
= &elf_section_data (relplt
)->this_hdr
;
7970 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7971 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7974 plt
= bfd_get_section_by_name (abfd
, ".plt");
7978 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7979 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7982 count
= relplt
->size
/ hdr
->sh_entsize
;
7983 size
= count
* sizeof (asymbol
);
7984 p
= relplt
->relocation
;
7985 for (i
= 0; i
< count
; i
++, s
++, p
++)
7986 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7988 s
= *ret
= bfd_malloc (size
);
7992 names
= (char *) (s
+ count
);
7993 p
= relplt
->relocation
;
7995 for (i
= 0; i
< count
; i
++, s
++, p
++)
8000 addr
= bed
->plt_sym_val (i
, plt
, p
);
8001 if (addr
== (bfd_vma
) -1)
8004 *s
= **p
->sym_ptr_ptr
;
8006 s
->value
= addr
- plt
->vma
;
8008 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8009 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8011 memcpy (names
, "@plt", sizeof ("@plt"));
8012 names
+= sizeof ("@plt");
8019 /* Sort symbol by binding and section. We want to put definitions
8020 sorted by section at the beginning. */
8023 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8025 const Elf_Internal_Sym
*s1
;
8026 const Elf_Internal_Sym
*s2
;
8029 /* Make sure that undefined symbols are at the end. */
8030 s1
= (const Elf_Internal_Sym
*) arg1
;
8031 if (s1
->st_shndx
== SHN_UNDEF
)
8033 s2
= (const Elf_Internal_Sym
*) arg2
;
8034 if (s2
->st_shndx
== SHN_UNDEF
)
8037 /* Sorted by section index. */
8038 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8042 /* Sorted by binding. */
8043 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8048 Elf_Internal_Sym
*sym
;
8053 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8055 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8056 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8057 return strcmp (s1
->name
, s2
->name
);
8060 /* Check if 2 sections define the same set of local and global
8064 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8067 const struct elf_backend_data
*bed1
, *bed2
;
8068 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8069 bfd_size_type symcount1
, symcount2
;
8070 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8071 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8072 Elf_Internal_Sym
*isymend
;
8073 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8074 bfd_size_type count1
, count2
, i
;
8081 /* If both are .gnu.linkonce sections, they have to have the same
8083 if (strncmp (sec1
->name
, ".gnu.linkonce",
8084 sizeof ".gnu.linkonce" - 1) == 0
8085 && strncmp (sec2
->name
, ".gnu.linkonce",
8086 sizeof ".gnu.linkonce" - 1) == 0)
8087 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8088 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8090 /* Both sections have to be in ELF. */
8091 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8092 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8095 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8098 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8099 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8101 /* If both are members of section groups, they have to have the
8103 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8107 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8108 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8109 if (shndx1
== -1 || shndx2
== -1)
8112 bed1
= get_elf_backend_data (bfd1
);
8113 bed2
= get_elf_backend_data (bfd2
);
8114 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8115 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8116 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8117 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8119 if (symcount1
== 0 || symcount2
== 0)
8122 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8124 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8128 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8131 /* Sort symbols by binding and section. Global definitions are at
8133 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8134 elf_sort_elf_symbol
);
8135 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8136 elf_sort_elf_symbol
);
8138 /* Count definitions in the section. */
8140 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8141 isym
< isymend
; isym
++)
8143 if (isym
->st_shndx
== (unsigned int) shndx1
)
8150 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8155 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8156 isym
< isymend
; isym
++)
8158 if (isym
->st_shndx
== (unsigned int) shndx2
)
8165 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8169 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8172 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8173 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8175 if (symtable1
== NULL
|| symtable2
== NULL
)
8179 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8180 isym
< isymend
; isym
++)
8183 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8190 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8191 isym
< isymend
; isym
++)
8194 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8200 /* Sort symbol by name. */
8201 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8202 elf_sym_name_compare
);
8203 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8204 elf_sym_name_compare
);
8206 for (i
= 0; i
< count1
; i
++)
8207 /* Two symbols must have the same binding, type and name. */
8208 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8209 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8210 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)