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
)
412 unsigned int iname
= isym
->st_name
;
413 unsigned int shindex
= symtab_hdr
->sh_link
;
414 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
415 /* Check for a bogus st_shndx to avoid crashing. */
416 && isym
->st_shndx
< elf_numsections (abfd
)
417 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
419 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
420 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
423 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
426 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
427 sections. The first element is the flags, the rest are section
430 typedef union elf_internal_group
{
431 Elf_Internal_Shdr
*shdr
;
433 } Elf_Internal_Group
;
435 /* Return the name of the group signature symbol. Why isn't the
436 signature just a string? */
439 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
441 Elf_Internal_Shdr
*hdr
;
442 unsigned char esym
[sizeof (Elf64_External_Sym
)];
443 Elf_External_Sym_Shndx eshndx
;
444 Elf_Internal_Sym isym
;
446 /* First we need to ensure the symbol table is available. */
447 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
450 /* Go read the symbol. */
451 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
452 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
453 &isym
, esym
, &eshndx
) == NULL
)
456 return bfd_elf_sym_name (abfd
, hdr
, &isym
);
459 /* Set next_in_group list pointer, and group name for NEWSECT. */
462 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
464 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
466 /* If num_group is zero, read in all SHT_GROUP sections. The count
467 is set to -1 if there are no SHT_GROUP sections. */
470 unsigned int i
, shnum
;
472 /* First count the number of groups. If we have a SHT_GROUP
473 section with just a flag word (ie. sh_size is 4), ignore it. */
474 shnum
= elf_numsections (abfd
);
476 for (i
= 0; i
< shnum
; i
++)
478 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
479 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
484 num_group
= (unsigned) -1;
485 elf_tdata (abfd
)->num_group
= num_group
;
489 /* We keep a list of elf section headers for group sections,
490 so we can find them quickly. */
491 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
492 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
493 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
497 for (i
= 0; i
< shnum
; i
++)
499 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
500 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
503 Elf_Internal_Group
*dest
;
505 /* Add to list of sections. */
506 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
509 /* Read the raw contents. */
510 BFD_ASSERT (sizeof (*dest
) >= 4);
511 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
512 shdr
->contents
= bfd_alloc (abfd
, amt
);
513 if (shdr
->contents
== NULL
514 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
515 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
519 /* Translate raw contents, a flag word followed by an
520 array of elf section indices all in target byte order,
521 to the flag word followed by an array of elf section
523 src
= shdr
->contents
+ shdr
->sh_size
;
524 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
531 idx
= H_GET_32 (abfd
, src
);
532 if (src
== shdr
->contents
)
535 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
536 shdr
->bfd_section
->flags
537 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
542 ((*_bfd_error_handler
)
543 (_("%B: invalid SHT_GROUP entry"), abfd
));
546 dest
->shdr
= elf_elfsections (abfd
)[idx
];
553 if (num_group
!= (unsigned) -1)
557 for (i
= 0; i
< num_group
; i
++)
559 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
560 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
561 unsigned int n_elt
= shdr
->sh_size
/ 4;
563 /* Look through this group's sections to see if current
564 section is a member. */
566 if ((++idx
)->shdr
== hdr
)
570 /* We are a member of this group. Go looking through
571 other members to see if any others are linked via
573 idx
= (Elf_Internal_Group
*) shdr
->contents
;
574 n_elt
= shdr
->sh_size
/ 4;
576 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
577 && elf_next_in_group (s
) != NULL
)
581 /* Snarf the group name from other member, and
582 insert current section in circular list. */
583 elf_group_name (newsect
) = elf_group_name (s
);
584 elf_next_in_group (newsect
) = elf_next_in_group (s
);
585 elf_next_in_group (s
) = newsect
;
591 gname
= group_signature (abfd
, shdr
);
594 elf_group_name (newsect
) = gname
;
596 /* Start a circular list with one element. */
597 elf_next_in_group (newsect
) = newsect
;
600 /* If the group section has been created, point to the
602 if (shdr
->bfd_section
!= NULL
)
603 elf_next_in_group (shdr
->bfd_section
) = newsect
;
611 if (elf_group_name (newsect
) == NULL
)
613 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
620 _bfd_elf_setup_group_pointers (bfd
*abfd
)
623 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
624 bfd_boolean result
= TRUE
;
626 if (num_group
== (unsigned) -1)
629 for (i
= 0; i
< num_group
; i
++)
631 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
632 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
633 unsigned int n_elt
= shdr
->sh_size
/ 4;
636 if ((++idx
)->shdr
->bfd_section
)
637 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
638 else if (idx
->shdr
->sh_type
== SHT_RELA
639 || idx
->shdr
->sh_type
== SHT_REL
)
640 /* We won't include relocation sections in section groups in
641 output object files. We adjust the group section size here
642 so that relocatable link will work correctly when
643 relocation sections are in section group in input object
645 shdr
->bfd_section
->size
-= 4;
648 /* There are some unknown sections in the group. */
649 (*_bfd_error_handler
)
650 (_("%B: unknown [%d] section `%s' in group [%s]"),
652 (unsigned int) idx
->shdr
->sh_type
,
653 bfd_elf_string_from_elf_section (abfd
,
654 (elf_elfheader (abfd
)
657 shdr
->bfd_section
->name
);
665 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
667 return elf_next_in_group (sec
) != NULL
;
670 /* Make a BFD section from an ELF section. We store a pointer to the
671 BFD section in the bfd_section field of the header. */
674 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
675 Elf_Internal_Shdr
*hdr
,
681 const struct elf_backend_data
*bed
;
683 if (hdr
->bfd_section
!= NULL
)
685 BFD_ASSERT (strcmp (name
,
686 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
690 newsect
= bfd_make_section_anyway (abfd
, name
);
694 hdr
->bfd_section
= newsect
;
695 elf_section_data (newsect
)->this_hdr
= *hdr
;
696 elf_section_data (newsect
)->this_idx
= shindex
;
698 /* Always use the real type/flags. */
699 elf_section_type (newsect
) = hdr
->sh_type
;
700 elf_section_flags (newsect
) = hdr
->sh_flags
;
702 newsect
->filepos
= hdr
->sh_offset
;
704 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
705 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
706 || ! bfd_set_section_alignment (abfd
, newsect
,
707 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
710 flags
= SEC_NO_FLAGS
;
711 if (hdr
->sh_type
!= SHT_NOBITS
)
712 flags
|= SEC_HAS_CONTENTS
;
713 if (hdr
->sh_type
== SHT_GROUP
)
714 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
715 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
718 if (hdr
->sh_type
!= SHT_NOBITS
)
721 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
722 flags
|= SEC_READONLY
;
723 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
725 else if ((flags
& SEC_LOAD
) != 0)
727 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
730 newsect
->entsize
= hdr
->sh_entsize
;
731 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
732 flags
|= SEC_STRINGS
;
734 if (hdr
->sh_flags
& SHF_GROUP
)
735 if (!setup_group (abfd
, hdr
, newsect
))
737 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
738 flags
|= SEC_THREAD_LOCAL
;
740 /* The debugging sections appear to be recognized only by name, not
743 static const char *debug_sec_names
[] =
752 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
753 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
757 flags
|= SEC_DEBUGGING
;
760 /* As a GNU extension, if the name begins with .gnu.linkonce, we
761 only link a single copy of the section. This is used to support
762 g++. g++ will emit each template expansion in its own section.
763 The symbols will be defined as weak, so that multiple definitions
764 are permitted. The GNU linker extension is to actually discard
765 all but one of the sections. */
766 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
767 && elf_next_in_group (newsect
) == NULL
)
768 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
770 bed
= get_elf_backend_data (abfd
);
771 if (bed
->elf_backend_section_flags
)
772 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
775 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
778 if ((flags
& SEC_ALLOC
) != 0)
780 Elf_Internal_Phdr
*phdr
;
783 /* Look through the phdrs to see if we need to adjust the lma.
784 If all the p_paddr fields are zero, we ignore them, since
785 some ELF linkers produce such output. */
786 phdr
= elf_tdata (abfd
)->phdr
;
787 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
789 if (phdr
->p_paddr
!= 0)
792 if (i
< elf_elfheader (abfd
)->e_phnum
)
794 phdr
= elf_tdata (abfd
)->phdr
;
795 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
797 /* This section is part of this segment if its file
798 offset plus size lies within the segment's memory
799 span and, if the section is loaded, the extent of the
800 loaded data lies within the extent of the segment.
802 Note - we used to check the p_paddr field as well, and
803 refuse to set the LMA if it was 0. This is wrong
804 though, as a perfectly valid initialised segment can
805 have a p_paddr of zero. Some architectures, eg ARM,
806 place special significance on the address 0 and
807 executables need to be able to have a segment which
808 covers this address. */
809 if (phdr
->p_type
== PT_LOAD
810 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
811 && (hdr
->sh_offset
+ hdr
->sh_size
812 <= phdr
->p_offset
+ phdr
->p_memsz
)
813 && ((flags
& SEC_LOAD
) == 0
814 || (hdr
->sh_offset
+ hdr
->sh_size
815 <= phdr
->p_offset
+ phdr
->p_filesz
)))
817 if ((flags
& SEC_LOAD
) == 0)
818 newsect
->lma
= (phdr
->p_paddr
819 + hdr
->sh_addr
- phdr
->p_vaddr
);
821 /* We used to use the same adjustment for SEC_LOAD
822 sections, but that doesn't work if the segment
823 is packed with code from multiple VMAs.
824 Instead we calculate the section LMA based on
825 the segment LMA. It is assumed that the
826 segment will contain sections with contiguous
827 LMAs, even if the VMAs are not. */
828 newsect
->lma
= (phdr
->p_paddr
829 + hdr
->sh_offset
- phdr
->p_offset
);
831 /* With contiguous segments, we can't tell from file
832 offsets whether a section with zero size should
833 be placed at the end of one segment or the
834 beginning of the next. Decide based on vaddr. */
835 if (hdr
->sh_addr
>= phdr
->p_vaddr
836 && (hdr
->sh_addr
+ hdr
->sh_size
837 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
852 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
855 Helper functions for GDB to locate the string tables.
856 Since BFD hides string tables from callers, GDB needs to use an
857 internal hook to find them. Sun's .stabstr, in particular,
858 isn't even pointed to by the .stab section, so ordinary
859 mechanisms wouldn't work to find it, even if we had some.
862 struct elf_internal_shdr
*
863 bfd_elf_find_section (bfd
*abfd
, char *name
)
865 Elf_Internal_Shdr
**i_shdrp
;
870 i_shdrp
= elf_elfsections (abfd
);
873 shstrtab
= bfd_elf_get_str_section (abfd
,
874 elf_elfheader (abfd
)->e_shstrndx
);
875 if (shstrtab
!= NULL
)
877 max
= elf_numsections (abfd
);
878 for (i
= 1; i
< max
; i
++)
879 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
886 const char *const bfd_elf_section_type_names
[] = {
887 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
888 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
889 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
892 /* ELF relocs are against symbols. If we are producing relocatable
893 output, and the reloc is against an external symbol, and nothing
894 has given us any additional addend, the resulting reloc will also
895 be against the same symbol. In such a case, we don't want to
896 change anything about the way the reloc is handled, since it will
897 all be done at final link time. Rather than put special case code
898 into bfd_perform_relocation, all the reloc types use this howto
899 function. It just short circuits the reloc if producing
900 relocatable output against an external symbol. */
902 bfd_reloc_status_type
903 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
904 arelent
*reloc_entry
,
906 void *data ATTRIBUTE_UNUSED
,
907 asection
*input_section
,
909 char **error_message ATTRIBUTE_UNUSED
)
911 if (output_bfd
!= NULL
912 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
913 && (! reloc_entry
->howto
->partial_inplace
914 || reloc_entry
->addend
== 0))
916 reloc_entry
->address
+= input_section
->output_offset
;
920 return bfd_reloc_continue
;
923 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
926 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
929 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
930 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
933 /* Finish SHF_MERGE section merging. */
936 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
941 if (!is_elf_hash_table (info
->hash
))
944 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
945 if ((ibfd
->flags
& DYNAMIC
) == 0)
946 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
947 if ((sec
->flags
& SEC_MERGE
) != 0
948 && !bfd_is_abs_section (sec
->output_section
))
950 struct bfd_elf_section_data
*secdata
;
952 secdata
= elf_section_data (sec
);
953 if (! _bfd_add_merge_section (abfd
,
954 &elf_hash_table (info
)->merge_info
,
955 sec
, &secdata
->sec_info
))
957 else if (secdata
->sec_info
)
958 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
961 if (elf_hash_table (info
)->merge_info
!= NULL
)
962 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
963 merge_sections_remove_hook
);
968 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
970 sec
->output_section
= bfd_abs_section_ptr
;
971 sec
->output_offset
= sec
->vma
;
972 if (!is_elf_hash_table (info
->hash
))
975 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
978 /* Copy the program header and other data from one object module to
982 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
984 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
985 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
988 BFD_ASSERT (!elf_flags_init (obfd
)
989 || (elf_elfheader (obfd
)->e_flags
990 == elf_elfheader (ibfd
)->e_flags
));
992 elf_gp (obfd
) = elf_gp (ibfd
);
993 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
994 elf_flags_init (obfd
) = TRUE
;
998 /* Print out the program headers. */
1001 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1004 Elf_Internal_Phdr
*p
;
1006 bfd_byte
*dynbuf
= NULL
;
1008 p
= elf_tdata (abfd
)->phdr
;
1013 fprintf (f
, _("\nProgram Header:\n"));
1014 c
= elf_elfheader (abfd
)->e_phnum
;
1015 for (i
= 0; i
< c
; i
++, p
++)
1022 case PT_NULL
: pt
= "NULL"; break;
1023 case PT_LOAD
: pt
= "LOAD"; break;
1024 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1025 case PT_INTERP
: pt
= "INTERP"; break;
1026 case PT_NOTE
: pt
= "NOTE"; break;
1027 case PT_SHLIB
: pt
= "SHLIB"; break;
1028 case PT_PHDR
: pt
= "PHDR"; break;
1029 case PT_TLS
: pt
= "TLS"; break;
1030 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1031 case PT_GNU_STACK
: pt
= "STACK"; break;
1032 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1033 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1035 fprintf (f
, "%8s off 0x", pt
);
1036 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1037 fprintf (f
, " vaddr 0x");
1038 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1039 fprintf (f
, " paddr 0x");
1040 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1041 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1042 fprintf (f
, " filesz 0x");
1043 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1044 fprintf (f
, " memsz 0x");
1045 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1046 fprintf (f
, " flags %c%c%c",
1047 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1048 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1049 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1050 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1051 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1056 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1060 unsigned long shlink
;
1061 bfd_byte
*extdyn
, *extdynend
;
1063 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1065 fprintf (f
, _("\nDynamic Section:\n"));
1067 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1070 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1073 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1075 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1076 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1079 extdynend
= extdyn
+ s
->size
;
1080 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1082 Elf_Internal_Dyn dyn
;
1085 bfd_boolean stringp
;
1087 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1089 if (dyn
.d_tag
== DT_NULL
)
1096 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1100 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1101 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1102 case DT_PLTGOT
: name
= "PLTGOT"; break;
1103 case DT_HASH
: name
= "HASH"; break;
1104 case DT_STRTAB
: name
= "STRTAB"; break;
1105 case DT_SYMTAB
: name
= "SYMTAB"; break;
1106 case DT_RELA
: name
= "RELA"; break;
1107 case DT_RELASZ
: name
= "RELASZ"; break;
1108 case DT_RELAENT
: name
= "RELAENT"; break;
1109 case DT_STRSZ
: name
= "STRSZ"; break;
1110 case DT_SYMENT
: name
= "SYMENT"; break;
1111 case DT_INIT
: name
= "INIT"; break;
1112 case DT_FINI
: name
= "FINI"; break;
1113 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1114 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1115 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1116 case DT_REL
: name
= "REL"; break;
1117 case DT_RELSZ
: name
= "RELSZ"; break;
1118 case DT_RELENT
: name
= "RELENT"; break;
1119 case DT_PLTREL
: name
= "PLTREL"; break;
1120 case DT_DEBUG
: name
= "DEBUG"; break;
1121 case DT_TEXTREL
: name
= "TEXTREL"; break;
1122 case DT_JMPREL
: name
= "JMPREL"; break;
1123 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1124 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1125 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1126 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1127 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1128 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1129 case DT_FLAGS
: name
= "FLAGS"; break;
1130 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1131 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1132 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1133 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1134 case DT_MOVEENT
: name
= "MOVEENT"; break;
1135 case DT_MOVESZ
: name
= "MOVESZ"; break;
1136 case DT_FEATURE
: name
= "FEATURE"; break;
1137 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1138 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1139 case DT_SYMINENT
: name
= "SYMINENT"; break;
1140 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1141 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1142 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1143 case DT_PLTPAD
: name
= "PLTPAD"; break;
1144 case DT_MOVETAB
: name
= "MOVETAB"; break;
1145 case DT_SYMINFO
: name
= "SYMINFO"; break;
1146 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1147 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1148 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1149 case DT_VERSYM
: name
= "VERSYM"; break;
1150 case DT_VERDEF
: name
= "VERDEF"; break;
1151 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1152 case DT_VERNEED
: name
= "VERNEED"; break;
1153 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1154 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1155 case DT_USED
: name
= "USED"; break;
1156 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1159 fprintf (f
, " %-11s ", name
);
1161 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1165 unsigned int tagv
= dyn
.d_un
.d_val
;
1167 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1170 fprintf (f
, "%s", string
);
1179 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1180 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1182 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1186 if (elf_dynverdef (abfd
) != 0)
1188 Elf_Internal_Verdef
*t
;
1190 fprintf (f
, _("\nVersion definitions:\n"));
1191 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1193 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1194 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1195 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1197 Elf_Internal_Verdaux
*a
;
1200 for (a
= t
->vd_auxptr
->vda_nextptr
;
1203 fprintf (f
, "%s ", a
->vda_nodename
);
1209 if (elf_dynverref (abfd
) != 0)
1211 Elf_Internal_Verneed
*t
;
1213 fprintf (f
, _("\nVersion References:\n"));
1214 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1216 Elf_Internal_Vernaux
*a
;
1218 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1219 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1220 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1221 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1233 /* Display ELF-specific fields of a symbol. */
1236 bfd_elf_print_symbol (bfd
*abfd
,
1239 bfd_print_symbol_type how
)
1244 case bfd_print_symbol_name
:
1245 fprintf (file
, "%s", symbol
->name
);
1247 case bfd_print_symbol_more
:
1248 fprintf (file
, "elf ");
1249 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1250 fprintf (file
, " %lx", (long) symbol
->flags
);
1252 case bfd_print_symbol_all
:
1254 const char *section_name
;
1255 const char *name
= NULL
;
1256 const struct elf_backend_data
*bed
;
1257 unsigned char st_other
;
1260 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1262 bed
= get_elf_backend_data (abfd
);
1263 if (bed
->elf_backend_print_symbol_all
)
1264 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1268 name
= symbol
->name
;
1269 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1272 fprintf (file
, " %s\t", section_name
);
1273 /* Print the "other" value for a symbol. For common symbols,
1274 we've already printed the size; now print the alignment.
1275 For other symbols, we have no specified alignment, and
1276 we've printed the address; now print the size. */
1277 if (bfd_is_com_section (symbol
->section
))
1278 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1280 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1281 bfd_fprintf_vma (abfd
, file
, val
);
1283 /* If we have version information, print it. */
1284 if (elf_tdata (abfd
)->dynversym_section
!= 0
1285 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1286 || elf_tdata (abfd
)->dynverref_section
!= 0))
1288 unsigned int vernum
;
1289 const char *version_string
;
1291 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1294 version_string
= "";
1295 else if (vernum
== 1)
1296 version_string
= "Base";
1297 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1299 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1302 Elf_Internal_Verneed
*t
;
1304 version_string
= "";
1305 for (t
= elf_tdata (abfd
)->verref
;
1309 Elf_Internal_Vernaux
*a
;
1311 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1313 if (a
->vna_other
== vernum
)
1315 version_string
= a
->vna_nodename
;
1322 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1323 fprintf (file
, " %-11s", version_string
);
1328 fprintf (file
, " (%s)", version_string
);
1329 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1334 /* If the st_other field is not zero, print it. */
1335 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1340 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1341 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1342 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1344 /* Some other non-defined flags are also present, so print
1346 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1349 fprintf (file
, " %s", name
);
1355 /* Create an entry in an ELF linker hash table. */
1357 struct bfd_hash_entry
*
1358 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1359 struct bfd_hash_table
*table
,
1362 /* Allocate the structure if it has not already been allocated by a
1366 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1371 /* Call the allocation method of the superclass. */
1372 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1375 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1376 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1378 /* Set local fields. */
1381 ret
->got
= ret
->plt
= htab
->init_refcount
;
1382 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1383 - offsetof (struct elf_link_hash_entry
, size
)));
1384 /* Assume that we have been called by a non-ELF symbol reader.
1385 This flag is then reset by the code which reads an ELF input
1386 file. This ensures that a symbol created by a non-ELF symbol
1387 reader will have the flag set correctly. */
1394 /* Copy data from an indirect symbol to its direct symbol, hiding the
1395 old indirect symbol. Also used for copying flags to a weakdef. */
1398 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1399 struct elf_link_hash_entry
*dir
,
1400 struct elf_link_hash_entry
*ind
)
1403 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1405 /* Copy down any references that we may have already seen to the
1406 symbol which just became indirect. */
1408 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1409 dir
->ref_regular
|= ind
->ref_regular
;
1410 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1411 dir
->non_got_ref
|= ind
->non_got_ref
;
1412 dir
->needs_plt
|= ind
->needs_plt
;
1413 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1415 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1418 /* Copy over the global and procedure linkage table refcount entries.
1419 These may have been already set up by a check_relocs routine. */
1420 tmp
= dir
->got
.refcount
;
1421 if (tmp
< lowest_valid
)
1423 dir
->got
.refcount
= ind
->got
.refcount
;
1424 ind
->got
.refcount
= tmp
;
1427 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1429 tmp
= dir
->plt
.refcount
;
1430 if (tmp
< lowest_valid
)
1432 dir
->plt
.refcount
= ind
->plt
.refcount
;
1433 ind
->plt
.refcount
= tmp
;
1436 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1438 if (dir
->dynindx
== -1)
1440 dir
->dynindx
= ind
->dynindx
;
1441 dir
->dynstr_index
= ind
->dynstr_index
;
1443 ind
->dynstr_index
= 0;
1446 BFD_ASSERT (ind
->dynindx
== -1);
1450 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1451 struct elf_link_hash_entry
*h
,
1452 bfd_boolean force_local
)
1454 h
->plt
= elf_hash_table (info
)->init_offset
;
1458 h
->forced_local
= 1;
1459 if (h
->dynindx
!= -1)
1462 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1468 /* Initialize an ELF linker hash table. */
1471 _bfd_elf_link_hash_table_init
1472 (struct elf_link_hash_table
*table
,
1474 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1475 struct bfd_hash_table
*,
1480 table
->dynamic_sections_created
= FALSE
;
1481 table
->dynobj
= NULL
;
1482 /* Make sure can_refcount is extended to the width and signedness of
1483 init_refcount before we subtract one from it. */
1484 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1485 table
->init_refcount
.refcount
-= 1;
1486 table
->init_offset
.offset
= -(bfd_vma
) 1;
1487 /* The first dynamic symbol is a dummy. */
1488 table
->dynsymcount
= 1;
1489 table
->dynstr
= NULL
;
1490 table
->bucketcount
= 0;
1491 table
->needed
= NULL
;
1493 table
->merge_info
= NULL
;
1494 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1495 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1496 table
->dynlocal
= NULL
;
1497 table
->runpath
= NULL
;
1498 table
->tls_sec
= NULL
;
1499 table
->tls_size
= 0;
1500 table
->loaded
= NULL
;
1501 table
->is_relocatable_executable
= FALSE
;
1503 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1504 table
->root
.type
= bfd_link_elf_hash_table
;
1509 /* Create an ELF linker hash table. */
1511 struct bfd_link_hash_table
*
1512 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1514 struct elf_link_hash_table
*ret
;
1515 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1517 ret
= bfd_malloc (amt
);
1521 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1530 /* This is a hook for the ELF emulation code in the generic linker to
1531 tell the backend linker what file name to use for the DT_NEEDED
1532 entry for a dynamic object. */
1535 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1537 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1538 && bfd_get_format (abfd
) == bfd_object
)
1539 elf_dt_name (abfd
) = name
;
1543 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1546 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1547 && bfd_get_format (abfd
) == bfd_object
)
1548 lib_class
= elf_dyn_lib_class (abfd
);
1555 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1557 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1558 && bfd_get_format (abfd
) == bfd_object
)
1559 elf_dyn_lib_class (abfd
) = lib_class
;
1562 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1563 the linker ELF emulation code. */
1565 struct bfd_link_needed_list
*
1566 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1567 struct bfd_link_info
*info
)
1569 if (! is_elf_hash_table (info
->hash
))
1571 return elf_hash_table (info
)->needed
;
1574 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1575 hook for the linker ELF emulation code. */
1577 struct bfd_link_needed_list
*
1578 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1579 struct bfd_link_info
*info
)
1581 if (! is_elf_hash_table (info
->hash
))
1583 return elf_hash_table (info
)->runpath
;
1586 /* Get the name actually used for a dynamic object for a link. This
1587 is the SONAME entry if there is one. Otherwise, it is the string
1588 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1591 bfd_elf_get_dt_soname (bfd
*abfd
)
1593 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1594 && bfd_get_format (abfd
) == bfd_object
)
1595 return elf_dt_name (abfd
);
1599 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1600 the ELF linker emulation code. */
1603 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1604 struct bfd_link_needed_list
**pneeded
)
1607 bfd_byte
*dynbuf
= NULL
;
1609 unsigned long shlink
;
1610 bfd_byte
*extdyn
, *extdynend
;
1612 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1616 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1617 || bfd_get_format (abfd
) != bfd_object
)
1620 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1621 if (s
== NULL
|| s
->size
== 0)
1624 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1627 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1631 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1633 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1634 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1637 extdynend
= extdyn
+ s
->size
;
1638 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1640 Elf_Internal_Dyn dyn
;
1642 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1644 if (dyn
.d_tag
== DT_NULL
)
1647 if (dyn
.d_tag
== DT_NEEDED
)
1650 struct bfd_link_needed_list
*l
;
1651 unsigned int tagv
= dyn
.d_un
.d_val
;
1654 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1659 l
= bfd_alloc (abfd
, amt
);
1680 /* Allocate an ELF string table--force the first byte to be zero. */
1682 struct bfd_strtab_hash
*
1683 _bfd_elf_stringtab_init (void)
1685 struct bfd_strtab_hash
*ret
;
1687 ret
= _bfd_stringtab_init ();
1692 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1693 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1694 if (loc
== (bfd_size_type
) -1)
1696 _bfd_stringtab_free (ret
);
1703 /* ELF .o/exec file reading */
1705 /* Create a new bfd section from an ELF section header. */
1708 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1710 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1711 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1712 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1715 name
= bfd_elf_string_from_elf_section (abfd
,
1716 elf_elfheader (abfd
)->e_shstrndx
,
1719 switch (hdr
->sh_type
)
1722 /* Inactive section. Throw it away. */
1725 case SHT_PROGBITS
: /* Normal section with contents. */
1726 case SHT_NOBITS
: /* .bss section. */
1727 case SHT_HASH
: /* .hash section. */
1728 case SHT_NOTE
: /* .note section. */
1729 case SHT_INIT_ARRAY
: /* .init_array section. */
1730 case SHT_FINI_ARRAY
: /* .fini_array section. */
1731 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1732 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1733 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1735 case SHT_DYNAMIC
: /* Dynamic linking information. */
1736 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1738 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1740 Elf_Internal_Shdr
*dynsymhdr
;
1742 /* The shared libraries distributed with hpux11 have a bogus
1743 sh_link field for the ".dynamic" section. Find the
1744 string table for the ".dynsym" section instead. */
1745 if (elf_dynsymtab (abfd
) != 0)
1747 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1748 hdr
->sh_link
= dynsymhdr
->sh_link
;
1752 unsigned int i
, num_sec
;
1754 num_sec
= elf_numsections (abfd
);
1755 for (i
= 1; i
< num_sec
; i
++)
1757 dynsymhdr
= elf_elfsections (abfd
)[i
];
1758 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1760 hdr
->sh_link
= dynsymhdr
->sh_link
;
1768 case SHT_SYMTAB
: /* A symbol table */
1769 if (elf_onesymtab (abfd
) == shindex
)
1772 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1773 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1774 elf_onesymtab (abfd
) = shindex
;
1775 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1776 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1777 abfd
->flags
|= HAS_SYMS
;
1779 /* Sometimes a shared object will map in the symbol table. If
1780 SHF_ALLOC is set, and this is a shared object, then we also
1781 treat this section as a BFD section. We can not base the
1782 decision purely on SHF_ALLOC, because that flag is sometimes
1783 set in a relocatable object file, which would confuse the
1785 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1786 && (abfd
->flags
& DYNAMIC
) != 0
1787 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1791 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1792 can't read symbols without that section loaded as well. It
1793 is most likely specified by the next section header. */
1794 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1796 unsigned int i
, num_sec
;
1798 num_sec
= elf_numsections (abfd
);
1799 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1801 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1802 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1803 && hdr2
->sh_link
== shindex
)
1807 for (i
= 1; i
< shindex
; i
++)
1809 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1810 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1811 && hdr2
->sh_link
== shindex
)
1815 return bfd_section_from_shdr (abfd
, i
);
1819 case SHT_DYNSYM
: /* A dynamic symbol table */
1820 if (elf_dynsymtab (abfd
) == shindex
)
1823 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1824 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1825 elf_dynsymtab (abfd
) = shindex
;
1826 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1827 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1828 abfd
->flags
|= HAS_SYMS
;
1830 /* Besides being a symbol table, we also treat this as a regular
1831 section, so that objcopy can handle it. */
1832 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1834 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1835 if (elf_symtab_shndx (abfd
) == shindex
)
1838 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1839 elf_symtab_shndx (abfd
) = shindex
;
1840 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1841 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1844 case SHT_STRTAB
: /* A string table */
1845 if (hdr
->bfd_section
!= NULL
)
1847 if (ehdr
->e_shstrndx
== shindex
)
1849 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1850 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1853 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1856 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1857 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1860 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1863 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1864 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1865 elf_elfsections (abfd
)[shindex
] = hdr
;
1866 /* We also treat this as a regular section, so that objcopy
1868 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1872 /* If the string table isn't one of the above, then treat it as a
1873 regular section. We need to scan all the headers to be sure,
1874 just in case this strtab section appeared before the above. */
1875 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1877 unsigned int i
, num_sec
;
1879 num_sec
= elf_numsections (abfd
);
1880 for (i
= 1; i
< num_sec
; i
++)
1882 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1883 if (hdr2
->sh_link
== shindex
)
1885 if (! bfd_section_from_shdr (abfd
, i
))
1887 if (elf_onesymtab (abfd
) == i
)
1889 if (elf_dynsymtab (abfd
) == i
)
1890 goto dynsymtab_strtab
;
1894 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1898 /* *These* do a lot of work -- but build no sections! */
1900 asection
*target_sect
;
1901 Elf_Internal_Shdr
*hdr2
;
1902 unsigned int num_sec
= elf_numsections (abfd
);
1904 /* Check for a bogus link to avoid crashing. */
1905 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1906 || hdr
->sh_link
>= num_sec
)
1908 ((*_bfd_error_handler
)
1909 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1910 abfd
, hdr
->sh_link
, name
, shindex
));
1911 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1915 /* For some incomprehensible reason Oracle distributes
1916 libraries for Solaris in which some of the objects have
1917 bogus sh_link fields. It would be nice if we could just
1918 reject them, but, unfortunately, some people need to use
1919 them. We scan through the section headers; if we find only
1920 one suitable symbol table, we clobber the sh_link to point
1921 to it. I hope this doesn't break anything. */
1922 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1923 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1929 for (scan
= 1; scan
< num_sec
; scan
++)
1931 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1932 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1943 hdr
->sh_link
= found
;
1946 /* Get the symbol table. */
1947 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1948 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1949 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1952 /* If this reloc section does not use the main symbol table we
1953 don't treat it as a reloc section. BFD can't adequately
1954 represent such a section, so at least for now, we don't
1955 try. We just present it as a normal section. We also
1956 can't use it as a reloc section if it points to the null
1958 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1959 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1962 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1964 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1965 if (target_sect
== NULL
)
1968 if ((target_sect
->flags
& SEC_RELOC
) == 0
1969 || target_sect
->reloc_count
== 0)
1970 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1974 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1975 amt
= sizeof (*hdr2
);
1976 hdr2
= bfd_alloc (abfd
, amt
);
1977 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1980 elf_elfsections (abfd
)[shindex
] = hdr2
;
1981 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1982 target_sect
->flags
|= SEC_RELOC
;
1983 target_sect
->relocation
= NULL
;
1984 target_sect
->rel_filepos
= hdr
->sh_offset
;
1985 /* In the section to which the relocations apply, mark whether
1986 its relocations are of the REL or RELA variety. */
1987 if (hdr
->sh_size
!= 0)
1988 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1989 abfd
->flags
|= HAS_RELOC
;
1994 case SHT_GNU_verdef
:
1995 elf_dynverdef (abfd
) = shindex
;
1996 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1997 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2000 case SHT_GNU_versym
:
2001 elf_dynversym (abfd
) = shindex
;
2002 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2003 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2006 case SHT_GNU_verneed
:
2007 elf_dynverref (abfd
) = shindex
;
2008 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2009 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2016 /* We need a BFD section for objcopy and relocatable linking,
2017 and it's handy to have the signature available as the section
2019 name
= group_signature (abfd
, hdr
);
2022 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2024 if (hdr
->contents
!= NULL
)
2026 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2027 unsigned int n_elt
= hdr
->sh_size
/ 4;
2030 if (idx
->flags
& GRP_COMDAT
)
2031 hdr
->bfd_section
->flags
2032 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2034 /* We try to keep the same section order as it comes in. */
2036 while (--n_elt
!= 0)
2037 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2038 && elf_next_in_group (s
) != NULL
)
2040 elf_next_in_group (hdr
->bfd_section
) = s
;
2047 /* Check for any processor-specific section types. */
2048 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2055 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2056 Return SEC for sections that have no elf section, and NULL on error. */
2059 bfd_section_from_r_symndx (bfd
*abfd
,
2060 struct sym_sec_cache
*cache
,
2062 unsigned long r_symndx
)
2064 Elf_Internal_Shdr
*symtab_hdr
;
2065 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2066 Elf_External_Sym_Shndx eshndx
;
2067 Elf_Internal_Sym isym
;
2068 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2070 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2071 return cache
->sec
[ent
];
2073 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2074 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2075 &isym
, esym
, &eshndx
) == NULL
)
2078 if (cache
->abfd
!= abfd
)
2080 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2083 cache
->indx
[ent
] = r_symndx
;
2084 cache
->sec
[ent
] = sec
;
2085 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2086 || isym
.st_shndx
> SHN_HIRESERVE
)
2089 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2091 cache
->sec
[ent
] = s
;
2093 return cache
->sec
[ent
];
2096 /* Given an ELF section number, retrieve the corresponding BFD
2100 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2102 if (index
>= elf_numsections (abfd
))
2104 return elf_elfsections (abfd
)[index
]->bfd_section
;
2107 static struct bfd_elf_special_section
const special_sections
[] =
2109 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2110 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2111 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2112 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2113 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2114 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2115 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2116 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2117 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2118 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2119 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2120 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2121 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2122 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2123 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2124 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2125 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2126 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2127 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2128 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2129 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2130 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2131 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2132 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2133 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2134 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2135 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2136 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2137 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2138 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2139 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2140 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2141 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2142 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2143 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2144 { ".note", 5, -1, SHT_NOTE
, 0 },
2145 { ".rela", 5, -1, SHT_RELA
, 0 },
2146 { ".rel", 4, -1, SHT_REL
, 0 },
2147 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2148 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2149 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2150 { NULL
, 0, 0, 0, 0 }
2153 static const struct bfd_elf_special_section
*
2154 get_special_section (const char *name
,
2155 const struct bfd_elf_special_section
*special_sections
,
2159 int len
= strlen (name
);
2161 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2164 int prefix_len
= special_sections
[i
].prefix_length
;
2166 if (len
< prefix_len
)
2168 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2171 suffix_len
= special_sections
[i
].suffix_length
;
2172 if (suffix_len
<= 0)
2174 if (name
[prefix_len
] != 0)
2176 if (suffix_len
== 0)
2178 if (name
[prefix_len
] != '.'
2179 && (suffix_len
== -2
2180 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2186 if (len
< prefix_len
+ suffix_len
)
2188 if (memcmp (name
+ len
- suffix_len
,
2189 special_sections
[i
].prefix
+ prefix_len
,
2193 return &special_sections
[i
];
2199 const struct bfd_elf_special_section
*
2200 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2202 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2203 const struct bfd_elf_special_section
*ssect
= NULL
;
2205 /* See if this is one of the special sections. */
2208 unsigned int rela
= bed
->default_use_rela_p
;
2210 if (bed
->special_sections
)
2211 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2214 ssect
= get_special_section (name
, special_sections
, rela
);
2221 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2223 struct bfd_elf_section_data
*sdata
;
2224 const struct bfd_elf_special_section
*ssect
;
2226 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2229 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2232 sec
->used_by_bfd
= sdata
;
2235 elf_section_type (sec
) = SHT_NULL
;
2236 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2239 elf_section_type (sec
) = ssect
->type
;
2240 elf_section_flags (sec
) = ssect
->attr
;
2243 /* Indicate whether or not this section should use RELA relocations. */
2244 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2249 /* Create a new bfd section from an ELF program header.
2251 Since program segments have no names, we generate a synthetic name
2252 of the form segment<NUM>, where NUM is generally the index in the
2253 program header table. For segments that are split (see below) we
2254 generate the names segment<NUM>a and segment<NUM>b.
2256 Note that some program segments may have a file size that is different than
2257 (less than) the memory size. All this means is that at execution the
2258 system must allocate the amount of memory specified by the memory size,
2259 but only initialize it with the first "file size" bytes read from the
2260 file. This would occur for example, with program segments consisting
2261 of combined data+bss.
2263 To handle the above situation, this routine generates TWO bfd sections
2264 for the single program segment. The first has the length specified by
2265 the file size of the segment, and the second has the length specified
2266 by the difference between the two sizes. In effect, the segment is split
2267 into it's initialized and uninitialized parts.
2272 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2273 Elf_Internal_Phdr
*hdr
,
2275 const char *typename
)
2283 split
= ((hdr
->p_memsz
> 0)
2284 && (hdr
->p_filesz
> 0)
2285 && (hdr
->p_memsz
> hdr
->p_filesz
));
2286 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2287 len
= strlen (namebuf
) + 1;
2288 name
= bfd_alloc (abfd
, len
);
2291 memcpy (name
, namebuf
, len
);
2292 newsect
= bfd_make_section (abfd
, name
);
2293 if (newsect
== NULL
)
2295 newsect
->vma
= hdr
->p_vaddr
;
2296 newsect
->lma
= hdr
->p_paddr
;
2297 newsect
->size
= hdr
->p_filesz
;
2298 newsect
->filepos
= hdr
->p_offset
;
2299 newsect
->flags
|= SEC_HAS_CONTENTS
;
2300 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2301 if (hdr
->p_type
== PT_LOAD
)
2303 newsect
->flags
|= SEC_ALLOC
;
2304 newsect
->flags
|= SEC_LOAD
;
2305 if (hdr
->p_flags
& PF_X
)
2307 /* FIXME: all we known is that it has execute PERMISSION,
2309 newsect
->flags
|= SEC_CODE
;
2312 if (!(hdr
->p_flags
& PF_W
))
2314 newsect
->flags
|= SEC_READONLY
;
2319 sprintf (namebuf
, "%s%db", typename
, index
);
2320 len
= strlen (namebuf
) + 1;
2321 name
= bfd_alloc (abfd
, len
);
2324 memcpy (name
, namebuf
, len
);
2325 newsect
= bfd_make_section (abfd
, name
);
2326 if (newsect
== NULL
)
2328 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2329 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2330 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2331 if (hdr
->p_type
== PT_LOAD
)
2333 newsect
->flags
|= SEC_ALLOC
;
2334 if (hdr
->p_flags
& PF_X
)
2335 newsect
->flags
|= SEC_CODE
;
2337 if (!(hdr
->p_flags
& PF_W
))
2338 newsect
->flags
|= SEC_READONLY
;
2345 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2347 const struct elf_backend_data
*bed
;
2349 switch (hdr
->p_type
)
2352 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2355 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2358 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2361 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2364 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2366 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2371 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2374 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2376 case PT_GNU_EH_FRAME
:
2377 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2381 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2384 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2387 /* Check for any processor-specific program segment types. */
2388 bed
= get_elf_backend_data (abfd
);
2389 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2393 /* Initialize REL_HDR, the section-header for new section, containing
2394 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2395 relocations; otherwise, we use REL relocations. */
2398 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2399 Elf_Internal_Shdr
*rel_hdr
,
2401 bfd_boolean use_rela_p
)
2404 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2405 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2407 name
= bfd_alloc (abfd
, amt
);
2410 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2412 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2414 if (rel_hdr
->sh_name
== (unsigned int) -1)
2416 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2417 rel_hdr
->sh_entsize
= (use_rela_p
2418 ? bed
->s
->sizeof_rela
2419 : bed
->s
->sizeof_rel
);
2420 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2421 rel_hdr
->sh_flags
= 0;
2422 rel_hdr
->sh_addr
= 0;
2423 rel_hdr
->sh_size
= 0;
2424 rel_hdr
->sh_offset
= 0;
2429 /* Set up an ELF internal section header for a section. */
2432 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2434 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2435 bfd_boolean
*failedptr
= failedptrarg
;
2436 Elf_Internal_Shdr
*this_hdr
;
2440 /* We already failed; just get out of the bfd_map_over_sections
2445 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2447 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2448 asect
->name
, FALSE
);
2449 if (this_hdr
->sh_name
== (unsigned int) -1)
2455 this_hdr
->sh_flags
= 0;
2457 if ((asect
->flags
& SEC_ALLOC
) != 0
2458 || asect
->user_set_vma
)
2459 this_hdr
->sh_addr
= asect
->vma
;
2461 this_hdr
->sh_addr
= 0;
2463 this_hdr
->sh_offset
= 0;
2464 this_hdr
->sh_size
= asect
->size
;
2465 this_hdr
->sh_link
= 0;
2466 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2467 /* The sh_entsize and sh_info fields may have been set already by
2468 copy_private_section_data. */
2470 this_hdr
->bfd_section
= asect
;
2471 this_hdr
->contents
= NULL
;
2473 /* If the section type is unspecified, we set it based on
2475 if (this_hdr
->sh_type
== SHT_NULL
)
2477 if ((asect
->flags
& SEC_GROUP
) != 0)
2479 /* We also need to mark SHF_GROUP here for relocatable
2481 struct bfd_link_order
*l
;
2484 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2485 if (l
->type
== bfd_indirect_link_order
2486 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2489 /* The name is not important. Anything will do. */
2490 elf_group_name (elt
->output_section
) = "G";
2491 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2493 elt
= elf_next_in_group (elt
);
2494 /* During a relocatable link, the lists are
2497 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2499 this_hdr
->sh_type
= SHT_GROUP
;
2501 else if ((asect
->flags
& SEC_ALLOC
) != 0
2502 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2503 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2504 this_hdr
->sh_type
= SHT_NOBITS
;
2506 this_hdr
->sh_type
= SHT_PROGBITS
;
2509 switch (this_hdr
->sh_type
)
2515 case SHT_INIT_ARRAY
:
2516 case SHT_FINI_ARRAY
:
2517 case SHT_PREINIT_ARRAY
:
2524 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2528 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2532 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2536 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2537 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2541 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2542 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2545 case SHT_GNU_versym
:
2546 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2549 case SHT_GNU_verdef
:
2550 this_hdr
->sh_entsize
= 0;
2551 /* objcopy or strip will copy over sh_info, but may not set
2552 cverdefs. The linker will set cverdefs, but sh_info will be
2554 if (this_hdr
->sh_info
== 0)
2555 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2557 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2558 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2561 case SHT_GNU_verneed
:
2562 this_hdr
->sh_entsize
= 0;
2563 /* objcopy or strip will copy over sh_info, but may not set
2564 cverrefs. The linker will set cverrefs, but sh_info will be
2566 if (this_hdr
->sh_info
== 0)
2567 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2569 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2570 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2574 this_hdr
->sh_entsize
= 4;
2578 if ((asect
->flags
& SEC_ALLOC
) != 0)
2579 this_hdr
->sh_flags
|= SHF_ALLOC
;
2580 if ((asect
->flags
& SEC_READONLY
) == 0)
2581 this_hdr
->sh_flags
|= SHF_WRITE
;
2582 if ((asect
->flags
& SEC_CODE
) != 0)
2583 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2584 if ((asect
->flags
& SEC_MERGE
) != 0)
2586 this_hdr
->sh_flags
|= SHF_MERGE
;
2587 this_hdr
->sh_entsize
= asect
->entsize
;
2588 if ((asect
->flags
& SEC_STRINGS
) != 0)
2589 this_hdr
->sh_flags
|= SHF_STRINGS
;
2591 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2592 this_hdr
->sh_flags
|= SHF_GROUP
;
2593 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2595 this_hdr
->sh_flags
|= SHF_TLS
;
2596 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2598 struct bfd_link_order
*o
;
2600 this_hdr
->sh_size
= 0;
2601 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2602 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2603 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2604 if (this_hdr
->sh_size
)
2605 this_hdr
->sh_type
= SHT_NOBITS
;
2609 /* Check for processor-specific section types. */
2610 if (bed
->elf_backend_fake_sections
2611 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2614 /* If the section has relocs, set up a section header for the
2615 SHT_REL[A] section. If two relocation sections are required for
2616 this section, it is up to the processor-specific back-end to
2617 create the other. */
2618 if ((asect
->flags
& SEC_RELOC
) != 0
2619 && !_bfd_elf_init_reloc_shdr (abfd
,
2620 &elf_section_data (asect
)->rel_hdr
,
2626 /* Fill in the contents of a SHT_GROUP section. */
2629 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2631 bfd_boolean
*failedptr
= failedptrarg
;
2632 unsigned long symindx
;
2633 asection
*elt
, *first
;
2635 struct bfd_link_order
*l
;
2638 /* Ignore linker created group section. See elfNN_ia64_object_p in
2640 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2645 if (elf_group_id (sec
) != NULL
)
2646 symindx
= elf_group_id (sec
)->udata
.i
;
2650 /* If called from the assembler, swap_out_syms will have set up
2651 elf_section_syms; If called for "ld -r", use target_index. */
2652 if (elf_section_syms (abfd
) != NULL
)
2653 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2655 symindx
= sec
->target_index
;
2657 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2659 /* The contents won't be allocated for "ld -r" or objcopy. */
2661 if (sec
->contents
== NULL
)
2664 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2666 /* Arrange for the section to be written out. */
2667 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2668 if (sec
->contents
== NULL
)
2675 loc
= sec
->contents
+ sec
->size
;
2677 /* Get the pointer to the first section in the group that gas
2678 squirreled away here. objcopy arranges for this to be set to the
2679 start of the input section group. */
2680 first
= elt
= elf_next_in_group (sec
);
2682 /* First element is a flag word. Rest of section is elf section
2683 indices for all the sections of the group. Write them backwards
2684 just to keep the group in the same order as given in .section
2685 directives, not that it matters. */
2694 s
= s
->output_section
;
2697 idx
= elf_section_data (s
)->this_idx
;
2698 H_PUT_32 (abfd
, idx
, loc
);
2699 elt
= elf_next_in_group (elt
);
2704 /* If this is a relocatable link, then the above did nothing because
2705 SEC is the output section. Look through the input sections
2707 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2708 if (l
->type
== bfd_indirect_link_order
2709 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2714 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2715 elt
= elf_next_in_group (elt
);
2716 /* During a relocatable link, the lists are circular. */
2718 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2720 if ((loc
-= 4) != sec
->contents
)
2723 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2726 /* Assign all ELF section numbers. The dummy first section is handled here
2727 too. The link/info pointers for the standard section types are filled
2728 in here too, while we're at it. */
2731 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2733 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2735 unsigned int section_number
, secn
;
2736 Elf_Internal_Shdr
**i_shdrp
;
2738 struct bfd_elf_section_data
*d
;
2742 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2744 /* SHT_GROUP sections are in relocatable files only. */
2745 if (link_info
== NULL
|| link_info
->relocatable
)
2749 /* Put SHT_GROUP sections first. */
2750 secp
= &abfd
->sections
;
2753 d
= elf_section_data (*secp
);
2755 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2757 if ((*secp
)->flags
& SEC_LINKER_CREATED
)
2759 /* Remove the linker created SHT_GROUP sections. */
2760 bfd_section_list_remove (abfd
, secp
);
2761 abfd
->section_count
--;
2766 if (section_number
== SHN_LORESERVE
)
2767 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2768 d
->this_idx
= section_number
++;
2772 secp
= &(*secp
)->next
;
2776 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2778 d
= elf_section_data (sec
);
2780 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2782 if (section_number
== SHN_LORESERVE
)
2783 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2784 d
->this_idx
= section_number
++;
2786 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2787 if ((sec
->flags
& SEC_RELOC
) == 0)
2791 if (section_number
== SHN_LORESERVE
)
2792 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2793 d
->rel_idx
= section_number
++;
2794 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2799 if (section_number
== SHN_LORESERVE
)
2800 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2801 d
->rel_idx2
= section_number
++;
2802 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2808 if (section_number
== SHN_LORESERVE
)
2809 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2810 t
->shstrtab_section
= section_number
++;
2811 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2812 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2814 if (bfd_get_symcount (abfd
) > 0)
2816 if (section_number
== SHN_LORESERVE
)
2817 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2818 t
->symtab_section
= section_number
++;
2819 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2820 if (section_number
> SHN_LORESERVE
- 2)
2822 if (section_number
== SHN_LORESERVE
)
2823 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2824 t
->symtab_shndx_section
= section_number
++;
2825 t
->symtab_shndx_hdr
.sh_name
2826 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2827 ".symtab_shndx", FALSE
);
2828 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2831 if (section_number
== SHN_LORESERVE
)
2832 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2833 t
->strtab_section
= section_number
++;
2834 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2837 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2838 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2840 elf_numsections (abfd
) = section_number
;
2841 elf_elfheader (abfd
)->e_shnum
= section_number
;
2842 if (section_number
> SHN_LORESERVE
)
2843 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2845 /* Set up the list of section header pointers, in agreement with the
2847 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2848 i_shdrp
= bfd_zalloc (abfd
, amt
);
2849 if (i_shdrp
== NULL
)
2852 amt
= sizeof (Elf_Internal_Shdr
);
2853 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2854 if (i_shdrp
[0] == NULL
)
2856 bfd_release (abfd
, i_shdrp
);
2860 elf_elfsections (abfd
) = i_shdrp
;
2862 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2863 if (bfd_get_symcount (abfd
) > 0)
2865 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2866 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2868 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2869 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2871 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2872 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2875 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2877 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2881 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2882 if (d
->rel_idx
!= 0)
2883 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2884 if (d
->rel_idx2
!= 0)
2885 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2887 /* Fill in the sh_link and sh_info fields while we're at it. */
2889 /* sh_link of a reloc section is the section index of the symbol
2890 table. sh_info is the section index of the section to which
2891 the relocation entries apply. */
2892 if (d
->rel_idx
!= 0)
2894 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2895 d
->rel_hdr
.sh_info
= d
->this_idx
;
2897 if (d
->rel_idx2
!= 0)
2899 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2900 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2903 /* We need to set up sh_link for SHF_LINK_ORDER. */
2904 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2906 s
= elf_linked_to_section (sec
);
2908 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2911 struct bfd_link_order
*p
;
2913 /* Find out what the corresponding section in output
2915 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2917 s
= p
->u
.indirect
.section
;
2918 if (p
->type
== bfd_indirect_link_order
2919 && (bfd_get_flavour (s
->owner
)
2920 == bfd_target_elf_flavour
))
2922 Elf_Internal_Shdr
** const elf_shdrp
2923 = elf_elfsections (s
->owner
);
2925 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2926 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2928 The Intel C compiler generates SHT_IA_64_UNWIND with
2929 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2930 sh_info fields. Hence we could get the situation
2931 where elfsec is 0. */
2934 const struct elf_backend_data
*bed
2935 = get_elf_backend_data (abfd
);
2936 if (bed
->link_order_error_handler
)
2937 bed
->link_order_error_handler
2938 (_("%B: warning: sh_link not set for section `%A'"),
2943 s
= elf_shdrp
[elfsec
]->bfd_section
;
2944 if (elf_discarded_section (s
))
2947 (*_bfd_error_handler
)
2948 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2949 abfd
, d
->this_hdr
.bfd_section
,
2951 /* Point to the kept section if it has
2952 the same size as the discarded
2954 kept
= _bfd_elf_check_kept_section (s
);
2957 bfd_set_error (bfd_error_bad_value
);
2962 s
= s
->output_section
;
2963 BFD_ASSERT (s
!= NULL
);
2964 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2972 switch (d
->this_hdr
.sh_type
)
2976 /* A reloc section which we are treating as a normal BFD
2977 section. sh_link is the section index of the symbol
2978 table. sh_info is the section index of the section to
2979 which the relocation entries apply. We assume that an
2980 allocated reloc section uses the dynamic symbol table.
2981 FIXME: How can we be sure? */
2982 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2984 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2986 /* We look up the section the relocs apply to by name. */
2988 if (d
->this_hdr
.sh_type
== SHT_REL
)
2992 s
= bfd_get_section_by_name (abfd
, name
);
2994 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2998 /* We assume that a section named .stab*str is a stabs
2999 string section. We look for a section with the same name
3000 but without the trailing ``str'', and set its sh_link
3001 field to point to this section. */
3002 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3003 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3008 len
= strlen (sec
->name
);
3009 alc
= bfd_malloc (len
- 2);
3012 memcpy (alc
, sec
->name
, len
- 3);
3013 alc
[len
- 3] = '\0';
3014 s
= bfd_get_section_by_name (abfd
, alc
);
3018 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3020 /* This is a .stab section. */
3021 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3022 elf_section_data (s
)->this_hdr
.sh_entsize
3023 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3030 case SHT_GNU_verneed
:
3031 case SHT_GNU_verdef
:
3032 /* sh_link is the section header index of the string table
3033 used for the dynamic entries, or the symbol table, or the
3035 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3037 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3040 case SHT_GNU_LIBLIST
:
3041 /* sh_link is the section header index of the prelink library
3043 used for the dynamic entries, or the symbol table, or the
3045 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3046 ? ".dynstr" : ".gnu.libstr");
3048 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3052 case SHT_GNU_versym
:
3053 /* sh_link is the section header index of the symbol table
3054 this hash table or version table is for. */
3055 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3057 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3061 d
->this_hdr
.sh_link
= t
->symtab_section
;
3065 for (secn
= 1; secn
< section_number
; ++secn
)
3066 if (i_shdrp
[secn
] == NULL
)
3067 i_shdrp
[secn
] = i_shdrp
[0];
3069 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3070 i_shdrp
[secn
]->sh_name
);
3074 /* Map symbol from it's internal number to the external number, moving
3075 all local symbols to be at the head of the list. */
3078 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3080 /* If the backend has a special mapping, use it. */
3081 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3082 if (bed
->elf_backend_sym_is_global
)
3083 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3085 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3086 || bfd_is_und_section (bfd_get_section (sym
))
3087 || bfd_is_com_section (bfd_get_section (sym
)));
3091 elf_map_symbols (bfd
*abfd
)
3093 unsigned int symcount
= bfd_get_symcount (abfd
);
3094 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3095 asymbol
**sect_syms
;
3096 unsigned int num_locals
= 0;
3097 unsigned int num_globals
= 0;
3098 unsigned int num_locals2
= 0;
3099 unsigned int num_globals2
= 0;
3107 fprintf (stderr
, "elf_map_symbols\n");
3111 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3113 if (max_index
< asect
->index
)
3114 max_index
= asect
->index
;
3118 amt
= max_index
* sizeof (asymbol
*);
3119 sect_syms
= bfd_zalloc (abfd
, amt
);
3120 if (sect_syms
== NULL
)
3122 elf_section_syms (abfd
) = sect_syms
;
3123 elf_num_section_syms (abfd
) = max_index
;
3125 /* Init sect_syms entries for any section symbols we have already
3126 decided to output. */
3127 for (idx
= 0; idx
< symcount
; idx
++)
3129 asymbol
*sym
= syms
[idx
];
3131 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3138 if (sec
->owner
!= NULL
)
3140 if (sec
->owner
!= abfd
)
3142 if (sec
->output_offset
!= 0)
3145 sec
= sec
->output_section
;
3147 /* Empty sections in the input files may have had a
3148 section symbol created for them. (See the comment
3149 near the end of _bfd_generic_link_output_symbols in
3150 linker.c). If the linker script discards such
3151 sections then we will reach this point. Since we know
3152 that we cannot avoid this case, we detect it and skip
3153 the abort and the assignment to the sect_syms array.
3154 To reproduce this particular case try running the
3155 linker testsuite test ld-scripts/weak.exp for an ELF
3156 port that uses the generic linker. */
3157 if (sec
->owner
== NULL
)
3160 BFD_ASSERT (sec
->owner
== abfd
);
3162 sect_syms
[sec
->index
] = syms
[idx
];
3167 /* Classify all of the symbols. */
3168 for (idx
= 0; idx
< symcount
; idx
++)
3170 if (!sym_is_global (abfd
, syms
[idx
]))
3176 /* We will be adding a section symbol for each BFD section. Most normal
3177 sections will already have a section symbol in outsymbols, but
3178 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3179 at least in that case. */
3180 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3182 if (sect_syms
[asect
->index
] == NULL
)
3184 if (!sym_is_global (abfd
, asect
->symbol
))
3191 /* Now sort the symbols so the local symbols are first. */
3192 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3193 new_syms
= bfd_alloc (abfd
, amt
);
3195 if (new_syms
== NULL
)
3198 for (idx
= 0; idx
< symcount
; idx
++)
3200 asymbol
*sym
= syms
[idx
];
3203 if (!sym_is_global (abfd
, sym
))
3206 i
= num_locals
+ num_globals2
++;
3208 sym
->udata
.i
= i
+ 1;
3210 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3212 if (sect_syms
[asect
->index
] == NULL
)
3214 asymbol
*sym
= asect
->symbol
;
3217 sect_syms
[asect
->index
] = sym
;
3218 if (!sym_is_global (abfd
, sym
))
3221 i
= num_locals
+ num_globals2
++;
3223 sym
->udata
.i
= i
+ 1;
3227 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3229 elf_num_locals (abfd
) = num_locals
;
3230 elf_num_globals (abfd
) = num_globals
;
3234 /* Align to the maximum file alignment that could be required for any
3235 ELF data structure. */
3237 static inline file_ptr
3238 align_file_position (file_ptr off
, int align
)
3240 return (off
+ align
- 1) & ~(align
- 1);
3243 /* Assign a file position to a section, optionally aligning to the
3244 required section alignment. */
3247 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3255 al
= i_shdrp
->sh_addralign
;
3257 offset
= BFD_ALIGN (offset
, al
);
3259 i_shdrp
->sh_offset
= offset
;
3260 if (i_shdrp
->bfd_section
!= NULL
)
3261 i_shdrp
->bfd_section
->filepos
= offset
;
3262 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3263 offset
+= i_shdrp
->sh_size
;
3267 /* Compute the file positions we are going to put the sections at, and
3268 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3269 is not NULL, this is being called by the ELF backend linker. */
3272 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3273 struct bfd_link_info
*link_info
)
3275 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3277 struct bfd_strtab_hash
*strtab
= NULL
;
3278 Elf_Internal_Shdr
*shstrtab_hdr
;
3280 if (abfd
->output_has_begun
)
3283 /* Do any elf backend specific processing first. */
3284 if (bed
->elf_backend_begin_write_processing
)
3285 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3287 if (! prep_headers (abfd
))
3290 /* Post process the headers if necessary. */
3291 if (bed
->elf_backend_post_process_headers
)
3292 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3295 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3299 if (!assign_section_numbers (abfd
, link_info
))
3302 /* The backend linker builds symbol table information itself. */
3303 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3305 /* Non-zero if doing a relocatable link. */
3306 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3308 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3312 if (link_info
== NULL
)
3314 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3319 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3320 /* sh_name was set in prep_headers. */
3321 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3322 shstrtab_hdr
->sh_flags
= 0;
3323 shstrtab_hdr
->sh_addr
= 0;
3324 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3325 shstrtab_hdr
->sh_entsize
= 0;
3326 shstrtab_hdr
->sh_link
= 0;
3327 shstrtab_hdr
->sh_info
= 0;
3328 /* sh_offset is set in assign_file_positions_except_relocs. */
3329 shstrtab_hdr
->sh_addralign
= 1;
3331 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3334 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3337 Elf_Internal_Shdr
*hdr
;
3339 off
= elf_tdata (abfd
)->next_file_pos
;
3341 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3342 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3344 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3345 if (hdr
->sh_size
!= 0)
3346 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3348 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3349 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3351 elf_tdata (abfd
)->next_file_pos
= off
;
3353 /* Now that we know where the .strtab section goes, write it
3355 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3356 || ! _bfd_stringtab_emit (abfd
, strtab
))
3358 _bfd_stringtab_free (strtab
);
3361 abfd
->output_has_begun
= TRUE
;
3366 /* Create a mapping from a set of sections to a program segment. */
3368 static struct elf_segment_map
*
3369 make_mapping (bfd
*abfd
,
3370 asection
**sections
,
3375 struct elf_segment_map
*m
;
3380 amt
= sizeof (struct elf_segment_map
);
3381 amt
+= (to
- from
- 1) * sizeof (asection
*);
3382 m
= bfd_zalloc (abfd
, amt
);
3386 m
->p_type
= PT_LOAD
;
3387 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3388 m
->sections
[i
- from
] = *hdrpp
;
3389 m
->count
= to
- from
;
3391 if (from
== 0 && phdr
)
3393 /* Include the headers in the first PT_LOAD segment. */
3394 m
->includes_filehdr
= 1;
3395 m
->includes_phdrs
= 1;
3401 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3404 struct elf_segment_map
*
3405 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3407 struct elf_segment_map
*m
;
3409 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3413 m
->p_type
= PT_DYNAMIC
;
3415 m
->sections
[0] = dynsec
;
3420 /* Set up a mapping from BFD sections to program segments. */
3423 map_sections_to_segments (bfd
*abfd
)
3425 asection
**sections
= NULL
;
3429 struct elf_segment_map
*mfirst
;
3430 struct elf_segment_map
**pm
;
3431 struct elf_segment_map
*m
;
3434 unsigned int phdr_index
;
3435 bfd_vma maxpagesize
;
3437 bfd_boolean phdr_in_segment
= TRUE
;
3438 bfd_boolean writable
;
3440 asection
*first_tls
= NULL
;
3441 asection
*dynsec
, *eh_frame_hdr
;
3444 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3447 if (bfd_count_sections (abfd
) == 0)
3450 /* Select the allocated sections, and sort them. */
3452 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3453 sections
= bfd_malloc (amt
);
3454 if (sections
== NULL
)
3458 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3460 if ((s
->flags
& SEC_ALLOC
) != 0)
3466 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3469 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3471 /* Build the mapping. */
3476 /* If we have a .interp section, then create a PT_PHDR segment for
3477 the program headers and a PT_INTERP segment for the .interp
3479 s
= bfd_get_section_by_name (abfd
, ".interp");
3480 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3482 amt
= sizeof (struct elf_segment_map
);
3483 m
= bfd_zalloc (abfd
, amt
);
3487 m
->p_type
= PT_PHDR
;
3488 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3489 m
->p_flags
= PF_R
| PF_X
;
3490 m
->p_flags_valid
= 1;
3491 m
->includes_phdrs
= 1;
3496 amt
= sizeof (struct elf_segment_map
);
3497 m
= bfd_zalloc (abfd
, amt
);
3501 m
->p_type
= PT_INTERP
;
3509 /* Look through the sections. We put sections in the same program
3510 segment when the start of the second section can be placed within
3511 a few bytes of the end of the first section. */
3515 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3517 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3519 && (dynsec
->flags
& SEC_LOAD
) == 0)
3522 /* Deal with -Ttext or something similar such that the first section
3523 is not adjacent to the program headers. This is an
3524 approximation, since at this point we don't know exactly how many
3525 program headers we will need. */
3528 bfd_size_type phdr_size
;
3530 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3532 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3533 if ((abfd
->flags
& D_PAGED
) == 0
3534 || sections
[0]->lma
< phdr_size
3535 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3536 phdr_in_segment
= FALSE
;
3539 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3542 bfd_boolean new_segment
;
3546 /* See if this section and the last one will fit in the same
3549 if (last_hdr
== NULL
)
3551 /* If we don't have a segment yet, then we don't need a new
3552 one (we build the last one after this loop). */
3553 new_segment
= FALSE
;
3555 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3557 /* If this section has a different relation between the
3558 virtual address and the load address, then we need a new
3562 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3563 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3565 /* If putting this section in this segment would force us to
3566 skip a page in the segment, then we need a new segment. */
3569 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3570 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3572 /* We don't want to put a loadable section after a
3573 nonloadable section in the same segment.
3574 Consider .tbss sections as loadable for this purpose. */
3577 else if ((abfd
->flags
& D_PAGED
) == 0)
3579 /* If the file is not demand paged, which means that we
3580 don't require the sections to be correctly aligned in the
3581 file, then there is no other reason for a new segment. */
3582 new_segment
= FALSE
;
3585 && (hdr
->flags
& SEC_READONLY
) == 0
3586 && (((last_hdr
->lma
+ last_size
- 1)
3587 & ~(maxpagesize
- 1))
3588 != (hdr
->lma
& ~(maxpagesize
- 1))))
3590 /* We don't want to put a writable section in a read only
3591 segment, unless they are on the same page in memory
3592 anyhow. We already know that the last section does not
3593 bring us past the current section on the page, so the
3594 only case in which the new section is not on the same
3595 page as the previous section is when the previous section
3596 ends precisely on a page boundary. */
3601 /* Otherwise, we can use the same segment. */
3602 new_segment
= FALSE
;
3607 if ((hdr
->flags
& SEC_READONLY
) == 0)
3610 /* .tbss sections effectively have zero size. */
3611 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3612 last_size
= hdr
->size
;
3618 /* We need a new program segment. We must create a new program
3619 header holding all the sections from phdr_index until hdr. */
3621 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3628 if ((hdr
->flags
& SEC_READONLY
) == 0)
3634 /* .tbss sections effectively have zero size. */
3635 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3636 last_size
= hdr
->size
;
3640 phdr_in_segment
= FALSE
;
3643 /* Create a final PT_LOAD program segment. */
3644 if (last_hdr
!= NULL
)
3646 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3654 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3657 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3664 /* For each loadable .note section, add a PT_NOTE segment. We don't
3665 use bfd_get_section_by_name, because if we link together
3666 nonloadable .note sections and loadable .note sections, we will
3667 generate two .note sections in the output file. FIXME: Using
3668 names for section types is bogus anyhow. */
3669 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3671 if ((s
->flags
& SEC_LOAD
) != 0
3672 && strncmp (s
->name
, ".note", 5) == 0)
3674 amt
= sizeof (struct elf_segment_map
);
3675 m
= bfd_zalloc (abfd
, amt
);
3679 m
->p_type
= PT_NOTE
;
3686 if (s
->flags
& SEC_THREAD_LOCAL
)
3694 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3699 amt
= sizeof (struct elf_segment_map
);
3700 amt
+= (tls_count
- 1) * sizeof (asection
*);
3701 m
= bfd_zalloc (abfd
, amt
);
3706 m
->count
= tls_count
;
3707 /* Mandated PF_R. */
3709 m
->p_flags_valid
= 1;
3710 for (i
= 0; i
< tls_count
; ++i
)
3712 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3713 m
->sections
[i
] = first_tls
;
3714 first_tls
= first_tls
->next
;
3721 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3723 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3724 if (eh_frame_hdr
!= NULL
3725 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3727 amt
= sizeof (struct elf_segment_map
);
3728 m
= bfd_zalloc (abfd
, amt
);
3732 m
->p_type
= PT_GNU_EH_FRAME
;
3734 m
->sections
[0] = eh_frame_hdr
->output_section
;
3740 if (elf_tdata (abfd
)->stack_flags
)
3742 amt
= sizeof (struct elf_segment_map
);
3743 m
= bfd_zalloc (abfd
, amt
);
3747 m
->p_type
= PT_GNU_STACK
;
3748 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3749 m
->p_flags_valid
= 1;
3755 if (elf_tdata (abfd
)->relro
)
3757 amt
= sizeof (struct elf_segment_map
);
3758 m
= bfd_zalloc (abfd
, amt
);
3762 m
->p_type
= PT_GNU_RELRO
;
3764 m
->p_flags_valid
= 1;
3773 elf_tdata (abfd
)->segment_map
= mfirst
;
3777 if (sections
!= NULL
)
3782 /* Sort sections by address. */
3785 elf_sort_sections (const void *arg1
, const void *arg2
)
3787 const asection
*sec1
= *(const asection
**) arg1
;
3788 const asection
*sec2
= *(const asection
**) arg2
;
3789 bfd_size_type size1
, size2
;
3791 /* Sort by LMA first, since this is the address used to
3792 place the section into a segment. */
3793 if (sec1
->lma
< sec2
->lma
)
3795 else if (sec1
->lma
> sec2
->lma
)
3798 /* Then sort by VMA. Normally the LMA and the VMA will be
3799 the same, and this will do nothing. */
3800 if (sec1
->vma
< sec2
->vma
)
3802 else if (sec1
->vma
> sec2
->vma
)
3805 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3807 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3813 /* If the indicies are the same, do not return 0
3814 here, but continue to try the next comparison. */
3815 if (sec1
->target_index
- sec2
->target_index
!= 0)
3816 return sec1
->target_index
- sec2
->target_index
;
3821 else if (TOEND (sec2
))
3826 /* Sort by size, to put zero sized sections
3827 before others at the same address. */
3829 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3830 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3837 return sec1
->target_index
- sec2
->target_index
;
3840 /* Ian Lance Taylor writes:
3842 We shouldn't be using % with a negative signed number. That's just
3843 not good. We have to make sure either that the number is not
3844 negative, or that the number has an unsigned type. When the types
3845 are all the same size they wind up as unsigned. When file_ptr is a
3846 larger signed type, the arithmetic winds up as signed long long,
3849 What we're trying to say here is something like ``increase OFF by
3850 the least amount that will cause it to be equal to the VMA modulo
3852 /* In other words, something like:
3854 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3855 off_offset = off % bed->maxpagesize;
3856 if (vma_offset < off_offset)
3857 adjustment = vma_offset + bed->maxpagesize - off_offset;
3859 adjustment = vma_offset - off_offset;
3861 which can can be collapsed into the expression below. */
3864 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3866 return ((vma
- off
) % maxpagesize
);
3869 /* Assign file positions to the sections based on the mapping from
3870 sections to segments. This function also sets up some fields in
3871 the file header, and writes out the program headers. */
3874 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3876 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3878 struct elf_segment_map
*m
;
3880 Elf_Internal_Phdr
*phdrs
;
3882 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3883 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3884 Elf_Internal_Phdr
*p
;
3887 if (elf_tdata (abfd
)->segment_map
== NULL
)
3889 if (! map_sections_to_segments (abfd
))
3894 /* The placement algorithm assumes that non allocated sections are
3895 not in PT_LOAD segments. We ensure this here by removing such
3896 sections from the segment map. */
3897 for (m
= elf_tdata (abfd
)->segment_map
;
3901 unsigned int new_count
;
3904 if (m
->p_type
!= PT_LOAD
)
3908 for (i
= 0; i
< m
->count
; i
++)
3910 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3913 m
->sections
[new_count
] = m
->sections
[i
];
3919 if (new_count
!= m
->count
)
3920 m
->count
= new_count
;
3924 if (bed
->elf_backend_modify_segment_map
)
3926 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3931 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3934 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3935 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3936 elf_elfheader (abfd
)->e_phnum
= count
;
3940 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
3944 /* If we already counted the number of program segments, make sure
3945 that we allocated enough space. This happens when SIZEOF_HEADERS
3946 is used in a linker script. */
3947 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3948 if (alloc
!= 0 && count
> alloc
)
3950 ((*_bfd_error_handler
)
3951 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
3952 abfd
, alloc
, count
));
3953 bfd_set_error (bfd_error_bad_value
);
3960 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3961 phdrs
= bfd_alloc (abfd
, amt
);
3965 off
= bed
->s
->sizeof_ehdr
;
3966 off
+= alloc
* bed
->s
->sizeof_phdr
;
3973 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3980 /* If elf_segment_map is not from map_sections_to_segments, the
3981 sections may not be correctly ordered. NOTE: sorting should
3982 not be done to the PT_NOTE section of a corefile, which may
3983 contain several pseudo-sections artificially created by bfd.
3984 Sorting these pseudo-sections breaks things badly. */
3986 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3987 && m
->p_type
== PT_NOTE
))
3988 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3991 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
3992 number of sections with contents contributing to both p_filesz
3993 and p_memsz, followed by a number of sections with no contents
3994 that just contribute to p_memsz. In this loop, OFF tracks next
3995 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
3996 an adjustment we use for segments that have no file contents
3997 but need zero filled memory allocation. */
3999 p
->p_type
= m
->p_type
;
4000 p
->p_flags
= m
->p_flags
;
4002 if (p
->p_type
== PT_LOAD
4005 bfd_size_type align
;
4008 if ((abfd
->flags
& D_PAGED
) != 0)
4009 align
= bed
->maxpagesize
;
4012 unsigned int align_power
= 0;
4013 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4015 unsigned int secalign
;
4017 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4018 if (secalign
> align_power
)
4019 align_power
= secalign
;
4021 align
= (bfd_size_type
) 1 << align_power
;
4024 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4027 && !m
->includes_filehdr
4028 && !m
->includes_phdrs
4029 && (ufile_ptr
) off
>= align
)
4031 /* If the first section isn't loadable, the same holds for
4032 any other sections. Since the segment won't need file
4033 space, we can make p_offset overlap some prior segment.
4034 However, .tbss is special. If a segment starts with
4035 .tbss, we need to look at the next section to decide
4036 whether the segment has any loadable sections. */
4038 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4040 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4044 voff
= adjust
- align
;
4050 /* Make sure the .dynamic section is the first section in the
4051 PT_DYNAMIC segment. */
4052 else if (p
->p_type
== PT_DYNAMIC
4054 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4057 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4059 bfd_set_error (bfd_error_bad_value
);
4066 p
->p_vaddr
= m
->sections
[0]->vma
;
4068 if (m
->p_paddr_valid
)
4069 p
->p_paddr
= m
->p_paddr
;
4070 else if (m
->count
== 0)
4073 p
->p_paddr
= m
->sections
[0]->lma
;
4075 if (p
->p_type
== PT_LOAD
4076 && (abfd
->flags
& D_PAGED
) != 0)
4077 p
->p_align
= bed
->maxpagesize
;
4078 else if (m
->count
== 0)
4079 p
->p_align
= 1 << bed
->s
->log_file_align
;
4087 if (m
->includes_filehdr
)
4089 if (! m
->p_flags_valid
)
4092 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4093 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4096 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4098 if (p
->p_vaddr
< (bfd_vma
) off
)
4100 (*_bfd_error_handler
)
4101 (_("%B: Not enough room for program headers, try linking with -N"),
4103 bfd_set_error (bfd_error_bad_value
);
4108 if (! m
->p_paddr_valid
)
4111 if (p
->p_type
== PT_LOAD
)
4113 filehdr_vaddr
= p
->p_vaddr
;
4114 filehdr_paddr
= p
->p_paddr
;
4118 if (m
->includes_phdrs
)
4120 if (! m
->p_flags_valid
)
4123 if (m
->includes_filehdr
)
4125 if (p
->p_type
== PT_LOAD
)
4127 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4128 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4133 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4137 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4138 p
->p_vaddr
-= off
- p
->p_offset
;
4139 if (! m
->p_paddr_valid
)
4140 p
->p_paddr
-= off
- p
->p_offset
;
4143 if (p
->p_type
== PT_LOAD
)
4145 phdrs_vaddr
= p
->p_vaddr
;
4146 phdrs_paddr
= p
->p_paddr
;
4149 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4152 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4153 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4156 if (p
->p_type
== PT_LOAD
4157 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4159 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4160 p
->p_offset
= off
+ voff
;
4165 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4166 p
->p_filesz
+= adjust
;
4167 p
->p_memsz
+= adjust
;
4171 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4175 bfd_size_type align
;
4179 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4181 if (p
->p_type
== PT_LOAD
4182 || p
->p_type
== PT_TLS
)
4184 bfd_signed_vma adjust
;
4186 if ((flags
& SEC_LOAD
) != 0)
4188 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4191 (*_bfd_error_handler
)
4192 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4193 abfd
, sec
, (unsigned long) sec
->lma
);
4197 p
->p_filesz
+= adjust
;
4198 p
->p_memsz
+= adjust
;
4200 /* .tbss is special. It doesn't contribute to p_memsz of
4202 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4203 || p
->p_type
== PT_TLS
)
4205 /* The section VMA must equal the file position
4206 modulo the page size. */
4207 bfd_size_type page
= align
;
4208 if ((abfd
->flags
& D_PAGED
) != 0)
4209 page
= bed
->maxpagesize
;
4210 adjust
= vma_page_aligned_bias (sec
->vma
,
4211 p
->p_vaddr
+ p
->p_memsz
,
4213 p
->p_memsz
+= adjust
;
4217 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4219 /* The section at i == 0 is the one that actually contains
4225 p
->p_filesz
= sec
->size
;
4231 /* The rest are fake sections that shouldn't be written. */
4240 if (p
->p_type
== PT_LOAD
)
4243 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4244 1997, and the exact reason for it isn't clear. One
4245 plausible explanation is that it is to work around
4246 a problem we have with linker scripts using data
4247 statements in NOLOAD sections. I don't think it
4248 makes a great deal of sense to have such a section
4249 assigned to a PT_LOAD segment, but apparently
4250 people do this. The data statement results in a
4251 bfd_data_link_order being built, and these need
4252 section contents to write into. Eventually, we get
4253 to _bfd_elf_write_object_contents which writes any
4254 section with contents to the output. Make room
4255 here for the write, so that following segments are
4257 if ((flags
& SEC_LOAD
) != 0
4258 || (flags
& SEC_HAS_CONTENTS
) != 0)
4262 if ((flags
& SEC_LOAD
) != 0)
4264 p
->p_filesz
+= sec
->size
;
4265 p
->p_memsz
+= sec
->size
;
4267 /* PR ld/594: Sections in note segments which are not loaded
4268 contribute to the file size but not the in-memory size. */
4269 else if (p
->p_type
== PT_NOTE
4270 && (flags
& SEC_HAS_CONTENTS
) != 0)
4271 p
->p_filesz
+= sec
->size
;
4273 /* .tbss is special. It doesn't contribute to p_memsz of
4275 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4276 || p
->p_type
== PT_TLS
)
4277 p
->p_memsz
+= sec
->size
;
4279 if (p
->p_type
== PT_TLS
4281 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4283 struct bfd_link_order
*o
;
4284 bfd_vma tbss_size
= 0;
4286 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4287 if (tbss_size
< o
->offset
+ o
->size
)
4288 tbss_size
= o
->offset
+ o
->size
;
4290 p
->p_memsz
+= tbss_size
;
4293 if (align
> p
->p_align
4294 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4298 if (! m
->p_flags_valid
)
4301 if ((flags
& SEC_CODE
) != 0)
4303 if ((flags
& SEC_READONLY
) == 0)
4309 /* Now that we have set the section file positions, we can set up
4310 the file positions for the non PT_LOAD segments. */
4311 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4315 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4317 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4318 /* If the section has not yet been assigned a file position,
4319 do so now. The ARM BPABI requires that .dynamic section
4320 not be marked SEC_ALLOC because it is not part of any
4321 PT_LOAD segment, so it will not be processed above. */
4322 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4325 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4328 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4330 off
= (_bfd_elf_assign_file_position_for_section
4331 (i_shdrpp
[i
], off
, TRUE
));
4332 p
->p_filesz
= m
->sections
[0]->size
;
4334 p
->p_offset
= m
->sections
[0]->filepos
;
4338 if (m
->includes_filehdr
)
4340 p
->p_vaddr
= filehdr_vaddr
;
4341 if (! m
->p_paddr_valid
)
4342 p
->p_paddr
= filehdr_paddr
;
4344 else if (m
->includes_phdrs
)
4346 p
->p_vaddr
= phdrs_vaddr
;
4347 if (! m
->p_paddr_valid
)
4348 p
->p_paddr
= phdrs_paddr
;
4350 else if (p
->p_type
== PT_GNU_RELRO
)
4352 Elf_Internal_Phdr
*lp
;
4354 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4356 if (lp
->p_type
== PT_LOAD
4357 && lp
->p_vaddr
<= link_info
->relro_end
4358 && lp
->p_vaddr
>= link_info
->relro_start
4359 && lp
->p_vaddr
+ lp
->p_filesz
4360 >= link_info
->relro_end
)
4364 if (lp
< phdrs
+ count
4365 && link_info
->relro_end
> lp
->p_vaddr
)
4367 p
->p_vaddr
= lp
->p_vaddr
;
4368 p
->p_paddr
= lp
->p_paddr
;
4369 p
->p_offset
= lp
->p_offset
;
4370 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4371 p
->p_memsz
= p
->p_filesz
;
4373 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4377 memset (p
, 0, sizeof *p
);
4378 p
->p_type
= PT_NULL
;
4384 /* Clear out any program headers we allocated but did not use. */
4385 for (; count
< alloc
; count
++, p
++)
4387 memset (p
, 0, sizeof *p
);
4388 p
->p_type
= PT_NULL
;
4391 elf_tdata (abfd
)->phdr
= phdrs
;
4393 elf_tdata (abfd
)->next_file_pos
= off
;
4395 /* Write out the program headers. */
4396 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4397 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4403 /* Get the size of the program header.
4405 If this is called by the linker before any of the section VMA's are set, it
4406 can't calculate the correct value for a strange memory layout. This only
4407 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4408 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4409 data segment (exclusive of .interp and .dynamic).
4411 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4412 will be two segments. */
4414 static bfd_size_type
4415 get_program_header_size (bfd
*abfd
)
4419 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4421 /* We can't return a different result each time we're called. */
4422 if (elf_tdata (abfd
)->program_header_size
!= 0)
4423 return elf_tdata (abfd
)->program_header_size
;
4425 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4427 struct elf_segment_map
*m
;
4430 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4432 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4433 return elf_tdata (abfd
)->program_header_size
;
4436 /* Assume we will need exactly two PT_LOAD segments: one for text
4437 and one for data. */
4440 s
= bfd_get_section_by_name (abfd
, ".interp");
4441 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4443 /* If we have a loadable interpreter section, we need a
4444 PT_INTERP segment. In this case, assume we also need a
4445 PT_PHDR segment, although that may not be true for all
4450 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4452 /* We need a PT_DYNAMIC segment. */
4456 if (elf_tdata (abfd
)->eh_frame_hdr
)
4458 /* We need a PT_GNU_EH_FRAME segment. */
4462 if (elf_tdata (abfd
)->stack_flags
)
4464 /* We need a PT_GNU_STACK segment. */
4468 if (elf_tdata (abfd
)->relro
)
4470 /* We need a PT_GNU_RELRO segment. */
4474 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4476 if ((s
->flags
& SEC_LOAD
) != 0
4477 && strncmp (s
->name
, ".note", 5) == 0)
4479 /* We need a PT_NOTE segment. */
4484 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4486 if (s
->flags
& SEC_THREAD_LOCAL
)
4488 /* We need a PT_TLS segment. */
4494 /* Let the backend count up any program headers it might need. */
4495 if (bed
->elf_backend_additional_program_headers
)
4499 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4505 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4506 return elf_tdata (abfd
)->program_header_size
;
4509 /* Work out the file positions of all the sections. This is called by
4510 _bfd_elf_compute_section_file_positions. All the section sizes and
4511 VMAs must be known before this is called.
4513 Reloc sections come in two flavours: Those processed specially as
4514 "side-channel" data attached to a section to which they apply, and
4515 those that bfd doesn't process as relocations. The latter sort are
4516 stored in a normal bfd section by bfd_section_from_shdr. We don't
4517 consider the former sort here, unless they form part of the loadable
4518 image. Reloc sections not assigned here will be handled later by
4519 assign_file_positions_for_relocs.
4521 We also don't set the positions of the .symtab and .strtab here. */
4524 assign_file_positions_except_relocs (bfd
*abfd
,
4525 struct bfd_link_info
*link_info
)
4527 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4528 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4529 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4530 unsigned int num_sec
= elf_numsections (abfd
);
4532 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4534 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4535 && bfd_get_format (abfd
) != bfd_core
)
4537 Elf_Internal_Shdr
**hdrpp
;
4540 /* Start after the ELF header. */
4541 off
= i_ehdrp
->e_ehsize
;
4543 /* We are not creating an executable, which means that we are
4544 not creating a program header, and that the actual order of
4545 the sections in the file is unimportant. */
4546 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4548 Elf_Internal_Shdr
*hdr
;
4551 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4552 && hdr
->bfd_section
== NULL
)
4553 || i
== tdata
->symtab_section
4554 || i
== tdata
->symtab_shndx_section
4555 || i
== tdata
->strtab_section
)
4557 hdr
->sh_offset
= -1;
4560 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4562 if (i
== SHN_LORESERVE
- 1)
4564 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4565 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4572 Elf_Internal_Shdr
**hdrpp
;
4574 /* Assign file positions for the loaded sections based on the
4575 assignment of sections to segments. */
4576 if (! assign_file_positions_for_segments (abfd
, link_info
))
4579 /* Assign file positions for the other sections. */
4581 off
= elf_tdata (abfd
)->next_file_pos
;
4582 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4584 Elf_Internal_Shdr
*hdr
;
4587 if (hdr
->bfd_section
!= NULL
4588 && hdr
->bfd_section
->filepos
!= 0)
4589 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4590 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4592 ((*_bfd_error_handler
)
4593 (_("%B: warning: allocated section `%s' not in segment"),
4595 (hdr
->bfd_section
== NULL
4597 : hdr
->bfd_section
->name
)));
4598 if ((abfd
->flags
& D_PAGED
) != 0)
4599 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4602 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4604 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4607 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4608 && hdr
->bfd_section
== NULL
)
4609 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4610 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4611 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4612 hdr
->sh_offset
= -1;
4614 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4616 if (i
== SHN_LORESERVE
- 1)
4618 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4619 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4624 /* Place the section headers. */
4625 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4626 i_ehdrp
->e_shoff
= off
;
4627 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4629 elf_tdata (abfd
)->next_file_pos
= off
;
4635 prep_headers (bfd
*abfd
)
4637 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4638 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4639 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4640 struct elf_strtab_hash
*shstrtab
;
4641 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4643 i_ehdrp
= elf_elfheader (abfd
);
4644 i_shdrp
= elf_elfsections (abfd
);
4646 shstrtab
= _bfd_elf_strtab_init ();
4647 if (shstrtab
== NULL
)
4650 elf_shstrtab (abfd
) = shstrtab
;
4652 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4653 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4654 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4655 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4657 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4658 i_ehdrp
->e_ident
[EI_DATA
] =
4659 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4660 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4662 if ((abfd
->flags
& DYNAMIC
) != 0)
4663 i_ehdrp
->e_type
= ET_DYN
;
4664 else if ((abfd
->flags
& EXEC_P
) != 0)
4665 i_ehdrp
->e_type
= ET_EXEC
;
4666 else if (bfd_get_format (abfd
) == bfd_core
)
4667 i_ehdrp
->e_type
= ET_CORE
;
4669 i_ehdrp
->e_type
= ET_REL
;
4671 switch (bfd_get_arch (abfd
))
4673 case bfd_arch_unknown
:
4674 i_ehdrp
->e_machine
= EM_NONE
;
4677 /* There used to be a long list of cases here, each one setting
4678 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4679 in the corresponding bfd definition. To avoid duplication,
4680 the switch was removed. Machines that need special handling
4681 can generally do it in elf_backend_final_write_processing(),
4682 unless they need the information earlier than the final write.
4683 Such need can generally be supplied by replacing the tests for
4684 e_machine with the conditions used to determine it. */
4686 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4689 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4690 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4692 /* No program header, for now. */
4693 i_ehdrp
->e_phoff
= 0;
4694 i_ehdrp
->e_phentsize
= 0;
4695 i_ehdrp
->e_phnum
= 0;
4697 /* Each bfd section is section header entry. */
4698 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4699 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4701 /* If we're building an executable, we'll need a program header table. */
4702 if (abfd
->flags
& EXEC_P
)
4703 /* It all happens later. */
4707 i_ehdrp
->e_phentsize
= 0;
4709 i_ehdrp
->e_phoff
= 0;
4712 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4713 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4714 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4715 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4716 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4717 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4718 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4719 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4720 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4726 /* Assign file positions for all the reloc sections which are not part
4727 of the loadable file image. */
4730 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4733 unsigned int i
, num_sec
;
4734 Elf_Internal_Shdr
**shdrpp
;
4736 off
= elf_tdata (abfd
)->next_file_pos
;
4738 num_sec
= elf_numsections (abfd
);
4739 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4741 Elf_Internal_Shdr
*shdrp
;
4744 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4745 && shdrp
->sh_offset
== -1)
4746 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4749 elf_tdata (abfd
)->next_file_pos
= off
;
4753 _bfd_elf_write_object_contents (bfd
*abfd
)
4755 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4756 Elf_Internal_Ehdr
*i_ehdrp
;
4757 Elf_Internal_Shdr
**i_shdrp
;
4759 unsigned int count
, num_sec
;
4761 if (! abfd
->output_has_begun
4762 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4765 i_shdrp
= elf_elfsections (abfd
);
4766 i_ehdrp
= elf_elfheader (abfd
);
4769 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4773 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4775 /* After writing the headers, we need to write the sections too... */
4776 num_sec
= elf_numsections (abfd
);
4777 for (count
= 1; count
< num_sec
; count
++)
4779 if (bed
->elf_backend_section_processing
)
4780 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4781 if (i_shdrp
[count
]->contents
)
4783 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4785 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4786 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4789 if (count
== SHN_LORESERVE
- 1)
4790 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4793 /* Write out the section header names. */
4794 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4795 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4798 if (bed
->elf_backend_final_write_processing
)
4799 (*bed
->elf_backend_final_write_processing
) (abfd
,
4800 elf_tdata (abfd
)->linker
);
4802 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4806 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4808 /* Hopefully this can be done just like an object file. */
4809 return _bfd_elf_write_object_contents (abfd
);
4812 /* Given a section, search the header to find them. */
4815 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4817 const struct elf_backend_data
*bed
;
4820 if (elf_section_data (asect
) != NULL
4821 && elf_section_data (asect
)->this_idx
!= 0)
4822 return elf_section_data (asect
)->this_idx
;
4824 if (bfd_is_abs_section (asect
))
4826 else if (bfd_is_com_section (asect
))
4828 else if (bfd_is_und_section (asect
))
4833 bed
= get_elf_backend_data (abfd
);
4834 if (bed
->elf_backend_section_from_bfd_section
)
4838 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4843 bfd_set_error (bfd_error_nonrepresentable_section
);
4848 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4852 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4854 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4856 flagword flags
= asym_ptr
->flags
;
4858 /* When gas creates relocations against local labels, it creates its
4859 own symbol for the section, but does put the symbol into the
4860 symbol chain, so udata is 0. When the linker is generating
4861 relocatable output, this section symbol may be for one of the
4862 input sections rather than the output section. */
4863 if (asym_ptr
->udata
.i
== 0
4864 && (flags
& BSF_SECTION_SYM
)
4865 && asym_ptr
->section
)
4869 if (asym_ptr
->section
->output_section
!= NULL
)
4870 indx
= asym_ptr
->section
->output_section
->index
;
4872 indx
= asym_ptr
->section
->index
;
4873 if (indx
< elf_num_section_syms (abfd
)
4874 && elf_section_syms (abfd
)[indx
] != NULL
)
4875 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4878 idx
= asym_ptr
->udata
.i
;
4882 /* This case can occur when using --strip-symbol on a symbol
4883 which is used in a relocation entry. */
4884 (*_bfd_error_handler
)
4885 (_("%B: symbol `%s' required but not present"),
4886 abfd
, bfd_asymbol_name (asym_ptr
));
4887 bfd_set_error (bfd_error_no_symbols
);
4894 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4895 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4896 elf_symbol_flags (flags
));
4904 /* Copy private BFD data. This copies any program header information. */
4907 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4909 Elf_Internal_Ehdr
*iehdr
;
4910 struct elf_segment_map
*map
;
4911 struct elf_segment_map
*map_first
;
4912 struct elf_segment_map
**pointer_to_map
;
4913 Elf_Internal_Phdr
*segment
;
4916 unsigned int num_segments
;
4917 bfd_boolean phdr_included
= FALSE
;
4918 bfd_vma maxpagesize
;
4919 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4920 unsigned int phdr_adjust_num
= 0;
4921 const struct elf_backend_data
*bed
;
4923 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4924 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4927 if (elf_tdata (ibfd
)->phdr
== NULL
)
4930 bed
= get_elf_backend_data (ibfd
);
4931 iehdr
= elf_elfheader (ibfd
);
4934 pointer_to_map
= &map_first
;
4936 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4937 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4939 /* Returns the end address of the segment + 1. */
4940 #define SEGMENT_END(segment, start) \
4941 (start + (segment->p_memsz > segment->p_filesz \
4942 ? segment->p_memsz : segment->p_filesz))
4944 #define SECTION_SIZE(section, segment) \
4945 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4946 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4947 ? section->size : 0)
4949 /* Returns TRUE if the given section is contained within
4950 the given segment. VMA addresses are compared. */
4951 #define IS_CONTAINED_BY_VMA(section, segment) \
4952 (section->vma >= segment->p_vaddr \
4953 && (section->vma + SECTION_SIZE (section, segment) \
4954 <= (SEGMENT_END (segment, segment->p_vaddr))))
4956 /* Returns TRUE if the given section is contained within
4957 the given segment. LMA addresses are compared. */
4958 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4959 (section->lma >= base \
4960 && (section->lma + SECTION_SIZE (section, segment) \
4961 <= SEGMENT_END (segment, base)))
4963 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4964 #define IS_COREFILE_NOTE(p, s) \
4965 (p->p_type == PT_NOTE \
4966 && bfd_get_format (ibfd) == bfd_core \
4967 && s->vma == 0 && s->lma == 0 \
4968 && (bfd_vma) s->filepos >= p->p_offset \
4969 && ((bfd_vma) s->filepos + s->size \
4970 <= p->p_offset + p->p_filesz))
4972 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4973 linker, which generates a PT_INTERP section with p_vaddr and
4974 p_memsz set to 0. */
4975 #define IS_SOLARIS_PT_INTERP(p, s) \
4977 && p->p_paddr == 0 \
4978 && p->p_memsz == 0 \
4979 && p->p_filesz > 0 \
4980 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4982 && (bfd_vma) s->filepos >= p->p_offset \
4983 && ((bfd_vma) s->filepos + s->size \
4984 <= p->p_offset + p->p_filesz))
4986 /* Decide if the given section should be included in the given segment.
4987 A section will be included if:
4988 1. It is within the address space of the segment -- we use the LMA
4989 if that is set for the segment and the VMA otherwise,
4990 2. It is an allocated segment,
4991 3. There is an output section associated with it,
4992 4. The section has not already been allocated to a previous segment.
4993 5. PT_GNU_STACK segments do not include any sections.
4994 6. PT_TLS segment includes only SHF_TLS sections.
4995 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
4996 8. PT_DYNAMIC should not contain empty sections at the beginning
4997 (with the possible exception of .dynamic). */
4998 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4999 ((((segment->p_paddr \
5000 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5001 : IS_CONTAINED_BY_VMA (section, segment)) \
5002 && (section->flags & SEC_ALLOC) != 0) \
5003 || IS_COREFILE_NOTE (segment, section)) \
5004 && section->output_section != NULL \
5005 && segment->p_type != PT_GNU_STACK \
5006 && (segment->p_type != PT_TLS \
5007 || (section->flags & SEC_THREAD_LOCAL)) \
5008 && (segment->p_type == PT_LOAD \
5009 || segment->p_type == PT_TLS \
5010 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5011 && (segment->p_type != PT_DYNAMIC \
5012 || SECTION_SIZE (section, segment) > 0 \
5013 || (segment->p_paddr \
5014 ? segment->p_paddr != section->lma \
5015 : segment->p_vaddr != section->vma) \
5016 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5018 && ! section->segment_mark)
5020 /* Returns TRUE iff seg1 starts after the end of seg2. */
5021 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5022 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5024 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5025 their VMA address ranges and their LMA address ranges overlap.
5026 It is possible to have overlapping VMA ranges without overlapping LMA
5027 ranges. RedBoot images for example can have both .data and .bss mapped
5028 to the same VMA range, but with the .data section mapped to a different
5030 #define SEGMENT_OVERLAPS(seg1, seg2) \
5031 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5032 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5033 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5034 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5036 /* Initialise the segment mark field. */
5037 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5038 section
->segment_mark
= FALSE
;
5040 /* Scan through the segments specified in the program header
5041 of the input BFD. For this first scan we look for overlaps
5042 in the loadable segments. These can be created by weird
5043 parameters to objcopy. Also, fix some solaris weirdness. */
5044 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5049 Elf_Internal_Phdr
*segment2
;
5051 if (segment
->p_type
== PT_INTERP
)
5052 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5053 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5055 /* Mininal change so that the normal section to segment
5056 assignment code will work. */
5057 segment
->p_vaddr
= section
->vma
;
5061 if (segment
->p_type
!= PT_LOAD
)
5064 /* Determine if this segment overlaps any previous segments. */
5065 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5067 bfd_signed_vma extra_length
;
5069 if (segment2
->p_type
!= PT_LOAD
5070 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5073 /* Merge the two segments together. */
5074 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5076 /* Extend SEGMENT2 to include SEGMENT and then delete
5079 SEGMENT_END (segment
, segment
->p_vaddr
)
5080 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5082 if (extra_length
> 0)
5084 segment2
->p_memsz
+= extra_length
;
5085 segment2
->p_filesz
+= extra_length
;
5088 segment
->p_type
= PT_NULL
;
5090 /* Since we have deleted P we must restart the outer loop. */
5092 segment
= elf_tdata (ibfd
)->phdr
;
5097 /* Extend SEGMENT to include SEGMENT2 and then delete
5100 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5101 - SEGMENT_END (segment
, segment
->p_vaddr
);
5103 if (extra_length
> 0)
5105 segment
->p_memsz
+= extra_length
;
5106 segment
->p_filesz
+= extra_length
;
5109 segment2
->p_type
= PT_NULL
;
5114 /* The second scan attempts to assign sections to segments. */
5115 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5119 unsigned int section_count
;
5120 asection
** sections
;
5121 asection
* output_section
;
5123 bfd_vma matching_lma
;
5124 bfd_vma suggested_lma
;
5128 if (segment
->p_type
== PT_NULL
)
5131 /* Compute how many sections might be placed into this segment. */
5132 for (section
= ibfd
->sections
, section_count
= 0;
5134 section
= section
->next
)
5135 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5138 /* Allocate a segment map big enough to contain
5139 all of the sections we have selected. */
5140 amt
= sizeof (struct elf_segment_map
);
5141 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5142 map
= bfd_alloc (obfd
, amt
);
5146 /* Initialise the fields of the segment map. Default to
5147 using the physical address of the segment in the input BFD. */
5149 map
->p_type
= segment
->p_type
;
5150 map
->p_flags
= segment
->p_flags
;
5151 map
->p_flags_valid
= 1;
5152 map
->p_paddr
= segment
->p_paddr
;
5153 map
->p_paddr_valid
= 1;
5155 /* Determine if this segment contains the ELF file header
5156 and if it contains the program headers themselves. */
5157 map
->includes_filehdr
= (segment
->p_offset
== 0
5158 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5160 map
->includes_phdrs
= 0;
5162 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5164 map
->includes_phdrs
=
5165 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5166 && (segment
->p_offset
+ segment
->p_filesz
5167 >= ((bfd_vma
) iehdr
->e_phoff
5168 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5170 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5171 phdr_included
= TRUE
;
5174 if (section_count
== 0)
5176 /* Special segments, such as the PT_PHDR segment, may contain
5177 no sections, but ordinary, loadable segments should contain
5178 something. They are allowed by the ELF spec however, so only
5179 a warning is produced. */
5180 if (segment
->p_type
== PT_LOAD
)
5181 (*_bfd_error_handler
)
5182 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5186 *pointer_to_map
= map
;
5187 pointer_to_map
= &map
->next
;
5192 /* Now scan the sections in the input BFD again and attempt
5193 to add their corresponding output sections to the segment map.
5194 The problem here is how to handle an output section which has
5195 been moved (ie had its LMA changed). There are four possibilities:
5197 1. None of the sections have been moved.
5198 In this case we can continue to use the segment LMA from the
5201 2. All of the sections have been moved by the same amount.
5202 In this case we can change the segment's LMA to match the LMA
5203 of the first section.
5205 3. Some of the sections have been moved, others have not.
5206 In this case those sections which have not been moved can be
5207 placed in the current segment which will have to have its size,
5208 and possibly its LMA changed, and a new segment or segments will
5209 have to be created to contain the other sections.
5211 4. The sections have been moved, but not by the same amount.
5212 In this case we can change the segment's LMA to match the LMA
5213 of the first section and we will have to create a new segment
5214 or segments to contain the other sections.
5216 In order to save time, we allocate an array to hold the section
5217 pointers that we are interested in. As these sections get assigned
5218 to a segment, they are removed from this array. */
5220 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5221 to work around this long long bug. */
5222 amt
= section_count
* sizeof (asection
*);
5223 sections
= bfd_malloc (amt
);
5224 if (sections
== NULL
)
5227 /* Step One: Scan for segment vs section LMA conflicts.
5228 Also add the sections to the section array allocated above.
5229 Also add the sections to the current segment. In the common
5230 case, where the sections have not been moved, this means that
5231 we have completely filled the segment, and there is nothing
5237 for (j
= 0, section
= ibfd
->sections
;
5239 section
= section
->next
)
5241 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5243 output_section
= section
->output_section
;
5245 sections
[j
++] = section
;
5247 /* The Solaris native linker always sets p_paddr to 0.
5248 We try to catch that case here, and set it to the
5249 correct value. Note - some backends require that
5250 p_paddr be left as zero. */
5251 if (segment
->p_paddr
== 0
5252 && segment
->p_vaddr
!= 0
5253 && (! bed
->want_p_paddr_set_to_zero
)
5255 && output_section
->lma
!= 0
5256 && (output_section
->vma
== (segment
->p_vaddr
5257 + (map
->includes_filehdr
5260 + (map
->includes_phdrs
5262 * iehdr
->e_phentsize
)
5264 map
->p_paddr
= segment
->p_vaddr
;
5266 /* Match up the physical address of the segment with the
5267 LMA address of the output section. */
5268 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5269 || IS_COREFILE_NOTE (segment
, section
)
5270 || (bed
->want_p_paddr_set_to_zero
&&
5271 IS_CONTAINED_BY_VMA (output_section
, segment
))
5274 if (matching_lma
== 0)
5275 matching_lma
= output_section
->lma
;
5277 /* We assume that if the section fits within the segment
5278 then it does not overlap any other section within that
5280 map
->sections
[isec
++] = output_section
;
5282 else if (suggested_lma
== 0)
5283 suggested_lma
= output_section
->lma
;
5287 BFD_ASSERT (j
== section_count
);
5289 /* Step Two: Adjust the physical address of the current segment,
5291 if (isec
== section_count
)
5293 /* All of the sections fitted within the segment as currently
5294 specified. This is the default case. Add the segment to
5295 the list of built segments and carry on to process the next
5296 program header in the input BFD. */
5297 map
->count
= section_count
;
5298 *pointer_to_map
= map
;
5299 pointer_to_map
= &map
->next
;
5306 if (matching_lma
!= 0)
5308 /* At least one section fits inside the current segment.
5309 Keep it, but modify its physical address to match the
5310 LMA of the first section that fitted. */
5311 map
->p_paddr
= matching_lma
;
5315 /* None of the sections fitted inside the current segment.
5316 Change the current segment's physical address to match
5317 the LMA of the first section. */
5318 map
->p_paddr
= suggested_lma
;
5321 /* Offset the segment physical address from the lma
5322 to allow for space taken up by elf headers. */
5323 if (map
->includes_filehdr
)
5324 map
->p_paddr
-= iehdr
->e_ehsize
;
5326 if (map
->includes_phdrs
)
5328 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5330 /* iehdr->e_phnum is just an estimate of the number
5331 of program headers that we will need. Make a note
5332 here of the number we used and the segment we chose
5333 to hold these headers, so that we can adjust the
5334 offset when we know the correct value. */
5335 phdr_adjust_num
= iehdr
->e_phnum
;
5336 phdr_adjust_seg
= map
;
5340 /* Step Three: Loop over the sections again, this time assigning
5341 those that fit to the current segment and removing them from the
5342 sections array; but making sure not to leave large gaps. Once all
5343 possible sections have been assigned to the current segment it is
5344 added to the list of built segments and if sections still remain
5345 to be assigned, a new segment is constructed before repeating
5353 /* Fill the current segment with sections that fit. */
5354 for (j
= 0; j
< section_count
; j
++)
5356 section
= sections
[j
];
5358 if (section
== NULL
)
5361 output_section
= section
->output_section
;
5363 BFD_ASSERT (output_section
!= NULL
);
5365 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5366 || IS_COREFILE_NOTE (segment
, section
))
5368 if (map
->count
== 0)
5370 /* If the first section in a segment does not start at
5371 the beginning of the segment, then something is
5373 if (output_section
->lma
!=
5375 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5376 + (map
->includes_phdrs
5377 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5383 asection
* prev_sec
;
5385 prev_sec
= map
->sections
[map
->count
- 1];
5387 /* If the gap between the end of the previous section
5388 and the start of this section is more than
5389 maxpagesize then we need to start a new segment. */
5390 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5392 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5393 || ((prev_sec
->lma
+ prev_sec
->size
)
5394 > output_section
->lma
))
5396 if (suggested_lma
== 0)
5397 suggested_lma
= output_section
->lma
;
5403 map
->sections
[map
->count
++] = output_section
;
5406 section
->segment_mark
= TRUE
;
5408 else if (suggested_lma
== 0)
5409 suggested_lma
= output_section
->lma
;
5412 BFD_ASSERT (map
->count
> 0);
5414 /* Add the current segment to the list of built segments. */
5415 *pointer_to_map
= map
;
5416 pointer_to_map
= &map
->next
;
5418 if (isec
< section_count
)
5420 /* We still have not allocated all of the sections to
5421 segments. Create a new segment here, initialise it
5422 and carry on looping. */
5423 amt
= sizeof (struct elf_segment_map
);
5424 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5425 map
= bfd_alloc (obfd
, amt
);
5432 /* Initialise the fields of the segment map. Set the physical
5433 physical address to the LMA of the first section that has
5434 not yet been assigned. */
5436 map
->p_type
= segment
->p_type
;
5437 map
->p_flags
= segment
->p_flags
;
5438 map
->p_flags_valid
= 1;
5439 map
->p_paddr
= suggested_lma
;
5440 map
->p_paddr_valid
= 1;
5441 map
->includes_filehdr
= 0;
5442 map
->includes_phdrs
= 0;
5445 while (isec
< section_count
);
5450 /* The Solaris linker creates program headers in which all the
5451 p_paddr fields are zero. When we try to objcopy or strip such a
5452 file, we get confused. Check for this case, and if we find it
5453 reset the p_paddr_valid fields. */
5454 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5455 if (map
->p_paddr
!= 0)
5458 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5459 map
->p_paddr_valid
= 0;
5461 elf_tdata (obfd
)->segment_map
= map_first
;
5463 /* If we had to estimate the number of program headers that were
5464 going to be needed, then check our estimate now and adjust
5465 the offset if necessary. */
5466 if (phdr_adjust_seg
!= NULL
)
5470 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5473 if (count
> phdr_adjust_num
)
5474 phdr_adjust_seg
->p_paddr
5475 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5480 #undef IS_CONTAINED_BY_VMA
5481 #undef IS_CONTAINED_BY_LMA
5482 #undef IS_COREFILE_NOTE
5483 #undef IS_SOLARIS_PT_INTERP
5484 #undef INCLUDE_SECTION_IN_SEGMENT
5485 #undef SEGMENT_AFTER_SEGMENT
5486 #undef SEGMENT_OVERLAPS
5490 /* Copy private section information. This copies over the entsize
5491 field, and sometimes the info field. */
5494 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5499 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5501 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5502 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5505 ihdr
= &elf_section_data (isec
)->this_hdr
;
5506 ohdr
= &elf_section_data (osec
)->this_hdr
;
5508 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5510 if (ihdr
->sh_type
== SHT_SYMTAB
5511 || ihdr
->sh_type
== SHT_DYNSYM
5512 || ihdr
->sh_type
== SHT_GNU_verneed
5513 || ihdr
->sh_type
== SHT_GNU_verdef
)
5514 ohdr
->sh_info
= ihdr
->sh_info
;
5516 /* Set things up for objcopy. The output SHT_GROUP section will
5517 have its elf_next_in_group pointing back to the input group
5519 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5520 elf_group_name (osec
) = elf_group_name (isec
);
5522 osec
->use_rela_p
= isec
->use_rela_p
;
5527 /* Copy private header information. */
5530 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5532 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5533 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5536 /* Copy over private BFD data if it has not already been copied.
5537 This must be done here, rather than in the copy_private_bfd_data
5538 entry point, because the latter is called after the section
5539 contents have been set, which means that the program headers have
5540 already been worked out. */
5541 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5543 if (! copy_private_bfd_data (ibfd
, obfd
))
5550 /* Copy private symbol information. If this symbol is in a section
5551 which we did not map into a BFD section, try to map the section
5552 index correctly. We use special macro definitions for the mapped
5553 section indices; these definitions are interpreted by the
5554 swap_out_syms function. */
5556 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5557 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5558 #define MAP_STRTAB (SHN_HIOS + 3)
5559 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5560 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5563 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5568 elf_symbol_type
*isym
, *osym
;
5570 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5571 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5574 isym
= elf_symbol_from (ibfd
, isymarg
);
5575 osym
= elf_symbol_from (obfd
, osymarg
);
5579 && bfd_is_abs_section (isym
->symbol
.section
))
5583 shndx
= isym
->internal_elf_sym
.st_shndx
;
5584 if (shndx
== elf_onesymtab (ibfd
))
5585 shndx
= MAP_ONESYMTAB
;
5586 else if (shndx
== elf_dynsymtab (ibfd
))
5587 shndx
= MAP_DYNSYMTAB
;
5588 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5590 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5591 shndx
= MAP_SHSTRTAB
;
5592 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5593 shndx
= MAP_SYM_SHNDX
;
5594 osym
->internal_elf_sym
.st_shndx
= shndx
;
5600 /* Swap out the symbols. */
5603 swap_out_syms (bfd
*abfd
,
5604 struct bfd_strtab_hash
**sttp
,
5607 const struct elf_backend_data
*bed
;
5610 struct bfd_strtab_hash
*stt
;
5611 Elf_Internal_Shdr
*symtab_hdr
;
5612 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5613 Elf_Internal_Shdr
*symstrtab_hdr
;
5614 bfd_byte
*outbound_syms
;
5615 bfd_byte
*outbound_shndx
;
5618 bfd_boolean name_local_sections
;
5620 if (!elf_map_symbols (abfd
))
5623 /* Dump out the symtabs. */
5624 stt
= _bfd_elf_stringtab_init ();
5628 bed
= get_elf_backend_data (abfd
);
5629 symcount
= bfd_get_symcount (abfd
);
5630 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5631 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5632 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5633 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5634 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5635 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5637 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5638 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5640 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5641 outbound_syms
= bfd_alloc (abfd
, amt
);
5642 if (outbound_syms
== NULL
)
5644 _bfd_stringtab_free (stt
);
5647 symtab_hdr
->contents
= outbound_syms
;
5649 outbound_shndx
= NULL
;
5650 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5651 if (symtab_shndx_hdr
->sh_name
!= 0)
5653 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5654 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5655 if (outbound_shndx
== NULL
)
5657 _bfd_stringtab_free (stt
);
5661 symtab_shndx_hdr
->contents
= outbound_shndx
;
5662 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5663 symtab_shndx_hdr
->sh_size
= amt
;
5664 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5665 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5668 /* Now generate the data (for "contents"). */
5670 /* Fill in zeroth symbol and swap it out. */
5671 Elf_Internal_Sym sym
;
5677 sym
.st_shndx
= SHN_UNDEF
;
5678 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5679 outbound_syms
+= bed
->s
->sizeof_sym
;
5680 if (outbound_shndx
!= NULL
)
5681 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5685 = (bed
->elf_backend_name_local_section_symbols
5686 && bed
->elf_backend_name_local_section_symbols (abfd
));
5688 syms
= bfd_get_outsymbols (abfd
);
5689 for (idx
= 0; idx
< symcount
; idx
++)
5691 Elf_Internal_Sym sym
;
5692 bfd_vma value
= syms
[idx
]->value
;
5693 elf_symbol_type
*type_ptr
;
5694 flagword flags
= syms
[idx
]->flags
;
5697 if (!name_local_sections
5698 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5700 /* Local section symbols have no name. */
5705 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5708 if (sym
.st_name
== (unsigned long) -1)
5710 _bfd_stringtab_free (stt
);
5715 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5717 if ((flags
& BSF_SECTION_SYM
) == 0
5718 && bfd_is_com_section (syms
[idx
]->section
))
5720 /* ELF common symbols put the alignment into the `value' field,
5721 and the size into the `size' field. This is backwards from
5722 how BFD handles it, so reverse it here. */
5723 sym
.st_size
= value
;
5724 if (type_ptr
== NULL
5725 || type_ptr
->internal_elf_sym
.st_value
== 0)
5726 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5728 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5729 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5730 (abfd
, syms
[idx
]->section
);
5734 asection
*sec
= syms
[idx
]->section
;
5737 if (sec
->output_section
)
5739 value
+= sec
->output_offset
;
5740 sec
= sec
->output_section
;
5743 /* Don't add in the section vma for relocatable output. */
5744 if (! relocatable_p
)
5746 sym
.st_value
= value
;
5747 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5749 if (bfd_is_abs_section (sec
)
5751 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5753 /* This symbol is in a real ELF section which we did
5754 not create as a BFD section. Undo the mapping done
5755 by copy_private_symbol_data. */
5756 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5760 shndx
= elf_onesymtab (abfd
);
5763 shndx
= elf_dynsymtab (abfd
);
5766 shndx
= elf_tdata (abfd
)->strtab_section
;
5769 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5772 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5780 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5786 /* Writing this would be a hell of a lot easier if
5787 we had some decent documentation on bfd, and
5788 knew what to expect of the library, and what to
5789 demand of applications. For example, it
5790 appears that `objcopy' might not set the
5791 section of a symbol to be a section that is
5792 actually in the output file. */
5793 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5796 _bfd_error_handler (_("\
5797 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5798 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5800 bfd_set_error (bfd_error_invalid_operation
);
5801 _bfd_stringtab_free (stt
);
5805 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5806 BFD_ASSERT (shndx
!= -1);
5810 sym
.st_shndx
= shndx
;
5813 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5815 else if ((flags
& BSF_FUNCTION
) != 0)
5817 else if ((flags
& BSF_OBJECT
) != 0)
5822 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5825 /* Processor-specific types. */
5826 if (type_ptr
!= NULL
5827 && bed
->elf_backend_get_symbol_type
)
5828 type
= ((*bed
->elf_backend_get_symbol_type
)
5829 (&type_ptr
->internal_elf_sym
, type
));
5831 if (flags
& BSF_SECTION_SYM
)
5833 if (flags
& BSF_GLOBAL
)
5834 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5836 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5838 else if (bfd_is_com_section (syms
[idx
]->section
))
5839 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5840 else if (bfd_is_und_section (syms
[idx
]->section
))
5841 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5845 else if (flags
& BSF_FILE
)
5846 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5849 int bind
= STB_LOCAL
;
5851 if (flags
& BSF_LOCAL
)
5853 else if (flags
& BSF_WEAK
)
5855 else if (flags
& BSF_GLOBAL
)
5858 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5861 if (type_ptr
!= NULL
)
5862 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5866 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5867 outbound_syms
+= bed
->s
->sizeof_sym
;
5868 if (outbound_shndx
!= NULL
)
5869 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5873 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5874 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5876 symstrtab_hdr
->sh_flags
= 0;
5877 symstrtab_hdr
->sh_addr
= 0;
5878 symstrtab_hdr
->sh_entsize
= 0;
5879 symstrtab_hdr
->sh_link
= 0;
5880 symstrtab_hdr
->sh_info
= 0;
5881 symstrtab_hdr
->sh_addralign
= 1;
5886 /* Return the number of bytes required to hold the symtab vector.
5888 Note that we base it on the count plus 1, since we will null terminate
5889 the vector allocated based on this size. However, the ELF symbol table
5890 always has a dummy entry as symbol #0, so it ends up even. */
5893 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5897 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5899 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5900 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5902 symtab_size
-= sizeof (asymbol
*);
5908 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5912 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5914 if (elf_dynsymtab (abfd
) == 0)
5916 bfd_set_error (bfd_error_invalid_operation
);
5920 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5921 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5923 symtab_size
-= sizeof (asymbol
*);
5929 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5932 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5935 /* Canonicalize the relocs. */
5938 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5945 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5947 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5950 tblptr
= section
->relocation
;
5951 for (i
= 0; i
< section
->reloc_count
; i
++)
5952 *relptr
++ = tblptr
++;
5956 return section
->reloc_count
;
5960 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5962 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5963 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5966 bfd_get_symcount (abfd
) = symcount
;
5971 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5972 asymbol
**allocation
)
5974 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5975 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5978 bfd_get_dynamic_symcount (abfd
) = symcount
;
5982 /* Return the size required for the dynamic reloc entries. Any loadable
5983 section that was actually installed in the BFD, and has type SHT_REL
5984 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
5985 dynamic reloc section. */
5988 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5993 if (elf_dynsymtab (abfd
) == 0)
5995 bfd_set_error (bfd_error_invalid_operation
);
5999 ret
= sizeof (arelent
*);
6000 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6001 if ((s
->flags
& SEC_LOAD
) != 0
6002 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6003 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6004 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6005 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6006 * sizeof (arelent
*));
6011 /* Canonicalize the dynamic relocation entries. Note that we return the
6012 dynamic relocations as a single block, although they are actually
6013 associated with particular sections; the interface, which was
6014 designed for SunOS style shared libraries, expects that there is only
6015 one set of dynamic relocs. Any loadable section that was actually
6016 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6017 dynamic symbol table, is considered to be a dynamic reloc section. */
6020 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6024 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6028 if (elf_dynsymtab (abfd
) == 0)
6030 bfd_set_error (bfd_error_invalid_operation
);
6034 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6036 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6038 if ((s
->flags
& SEC_LOAD
) != 0
6039 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6040 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6041 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6046 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6048 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6050 for (i
= 0; i
< count
; i
++)
6061 /* Read in the version information. */
6064 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6066 bfd_byte
*contents
= NULL
;
6068 unsigned int freeidx
= 0;
6070 if (elf_dynverref (abfd
) != 0)
6072 Elf_Internal_Shdr
*hdr
;
6073 Elf_External_Verneed
*everneed
;
6074 Elf_Internal_Verneed
*iverneed
;
6077 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6079 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6080 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6081 if (elf_tdata (abfd
)->verref
== NULL
)
6084 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6086 contents
= bfd_malloc (hdr
->sh_size
);
6087 if (contents
== NULL
)
6089 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6090 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6093 everneed
= (Elf_External_Verneed
*) contents
;
6094 iverneed
= elf_tdata (abfd
)->verref
;
6095 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6097 Elf_External_Vernaux
*evernaux
;
6098 Elf_Internal_Vernaux
*ivernaux
;
6101 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6103 iverneed
->vn_bfd
= abfd
;
6105 iverneed
->vn_filename
=
6106 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6108 if (iverneed
->vn_filename
== NULL
)
6111 amt
= iverneed
->vn_cnt
;
6112 amt
*= sizeof (Elf_Internal_Vernaux
);
6113 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6115 evernaux
= ((Elf_External_Vernaux
*)
6116 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6117 ivernaux
= iverneed
->vn_auxptr
;
6118 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6120 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6122 ivernaux
->vna_nodename
=
6123 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6124 ivernaux
->vna_name
);
6125 if (ivernaux
->vna_nodename
== NULL
)
6128 if (j
+ 1 < iverneed
->vn_cnt
)
6129 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6131 ivernaux
->vna_nextptr
= NULL
;
6133 evernaux
= ((Elf_External_Vernaux
*)
6134 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6136 if (ivernaux
->vna_other
> freeidx
)
6137 freeidx
= ivernaux
->vna_other
;
6140 if (i
+ 1 < hdr
->sh_info
)
6141 iverneed
->vn_nextref
= iverneed
+ 1;
6143 iverneed
->vn_nextref
= NULL
;
6145 everneed
= ((Elf_External_Verneed
*)
6146 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6153 if (elf_dynverdef (abfd
) != 0)
6155 Elf_Internal_Shdr
*hdr
;
6156 Elf_External_Verdef
*everdef
;
6157 Elf_Internal_Verdef
*iverdef
;
6158 Elf_Internal_Verdef
*iverdefarr
;
6159 Elf_Internal_Verdef iverdefmem
;
6161 unsigned int maxidx
;
6163 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6165 contents
= bfd_malloc (hdr
->sh_size
);
6166 if (contents
== NULL
)
6168 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6169 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6172 /* We know the number of entries in the section but not the maximum
6173 index. Therefore we have to run through all entries and find
6175 everdef
= (Elf_External_Verdef
*) contents
;
6177 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6179 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6181 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6182 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6184 everdef
= ((Elf_External_Verdef
*)
6185 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6188 if (default_imported_symver
)
6190 if (freeidx
> maxidx
)
6195 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6196 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6197 if (elf_tdata (abfd
)->verdef
== NULL
)
6200 elf_tdata (abfd
)->cverdefs
= maxidx
;
6202 everdef
= (Elf_External_Verdef
*) contents
;
6203 iverdefarr
= elf_tdata (abfd
)->verdef
;
6204 for (i
= 0; i
< hdr
->sh_info
; i
++)
6206 Elf_External_Verdaux
*everdaux
;
6207 Elf_Internal_Verdaux
*iverdaux
;
6210 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6212 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6213 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6215 iverdef
->vd_bfd
= abfd
;
6217 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6218 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6219 if (iverdef
->vd_auxptr
== NULL
)
6222 everdaux
= ((Elf_External_Verdaux
*)
6223 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6224 iverdaux
= iverdef
->vd_auxptr
;
6225 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6227 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6229 iverdaux
->vda_nodename
=
6230 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6231 iverdaux
->vda_name
);
6232 if (iverdaux
->vda_nodename
== NULL
)
6235 if (j
+ 1 < iverdef
->vd_cnt
)
6236 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6238 iverdaux
->vda_nextptr
= NULL
;
6240 everdaux
= ((Elf_External_Verdaux
*)
6241 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6244 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6246 if (i
+ 1 < hdr
->sh_info
)
6247 iverdef
->vd_nextdef
= iverdef
+ 1;
6249 iverdef
->vd_nextdef
= NULL
;
6251 everdef
= ((Elf_External_Verdef
*)
6252 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6258 else if (default_imported_symver
)
6265 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6266 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6267 if (elf_tdata (abfd
)->verdef
== NULL
)
6270 elf_tdata (abfd
)->cverdefs
= freeidx
;
6273 /* Create a default version based on the soname. */
6274 if (default_imported_symver
)
6276 Elf_Internal_Verdef
*iverdef
;
6277 Elf_Internal_Verdaux
*iverdaux
;
6279 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6281 iverdef
->vd_version
= VER_DEF_CURRENT
;
6282 iverdef
->vd_flags
= 0;
6283 iverdef
->vd_ndx
= freeidx
;
6284 iverdef
->vd_cnt
= 1;
6286 iverdef
->vd_bfd
= abfd
;
6288 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6289 if (iverdef
->vd_nodename
== NULL
)
6291 iverdef
->vd_nextdef
= NULL
;
6292 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6293 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6295 iverdaux
= iverdef
->vd_auxptr
;
6296 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6297 iverdaux
->vda_nextptr
= NULL
;
6303 if (contents
!= NULL
)
6309 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6311 elf_symbol_type
*newsym
;
6312 bfd_size_type amt
= sizeof (elf_symbol_type
);
6314 newsym
= bfd_zalloc (abfd
, amt
);
6319 newsym
->symbol
.the_bfd
= abfd
;
6320 return &newsym
->symbol
;
6325 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6329 bfd_symbol_info (symbol
, ret
);
6332 /* Return whether a symbol name implies a local symbol. Most targets
6333 use this function for the is_local_label_name entry point, but some
6337 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6340 /* Normal local symbols start with ``.L''. */
6341 if (name
[0] == '.' && name
[1] == 'L')
6344 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6345 DWARF debugging symbols starting with ``..''. */
6346 if (name
[0] == '.' && name
[1] == '.')
6349 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6350 emitting DWARF debugging output. I suspect this is actually a
6351 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6352 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6353 underscore to be emitted on some ELF targets). For ease of use,
6354 we treat such symbols as local. */
6355 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6362 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6363 asymbol
*symbol ATTRIBUTE_UNUSED
)
6370 _bfd_elf_set_arch_mach (bfd
*abfd
,
6371 enum bfd_architecture arch
,
6372 unsigned long machine
)
6374 /* If this isn't the right architecture for this backend, and this
6375 isn't the generic backend, fail. */
6376 if (arch
!= get_elf_backend_data (abfd
)->arch
6377 && arch
!= bfd_arch_unknown
6378 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6381 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6384 /* Find the function to a particular section and offset,
6385 for error reporting. */
6388 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6392 const char **filename_ptr
,
6393 const char **functionname_ptr
)
6395 const char *filename
;
6396 asymbol
*func
, *file
;
6399 /* ??? Given multiple file symbols, it is impossible to reliably
6400 choose the right file name for global symbols. File symbols are
6401 local symbols, and thus all file symbols must sort before any
6402 global symbols. The ELF spec may be interpreted to say that a
6403 file symbol must sort before other local symbols, but currently
6404 ld -r doesn't do this. So, for ld -r output, it is possible to
6405 make a better choice of file name for local symbols by ignoring
6406 file symbols appearing after a given local symbol. */
6407 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6413 state
= nothing_seen
;
6415 for (p
= symbols
; *p
!= NULL
; p
++)
6419 q
= (elf_symbol_type
*) *p
;
6421 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6427 if (state
== symbol_seen
)
6428 state
= file_after_symbol_seen
;
6434 if (bfd_get_section (&q
->symbol
) == section
6435 && q
->symbol
.value
>= low_func
6436 && q
->symbol
.value
<= offset
)
6438 func
= (asymbol
*) q
;
6439 low_func
= q
->symbol
.value
;
6442 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6443 && state
== file_after_symbol_seen
)
6446 filename
= bfd_asymbol_name (file
);
6450 if (state
== nothing_seen
)
6451 state
= symbol_seen
;
6458 *filename_ptr
= filename
;
6459 if (functionname_ptr
)
6460 *functionname_ptr
= bfd_asymbol_name (func
);
6465 /* Find the nearest line to a particular section and offset,
6466 for error reporting. */
6469 _bfd_elf_find_nearest_line (bfd
*abfd
,
6473 const char **filename_ptr
,
6474 const char **functionname_ptr
,
6475 unsigned int *line_ptr
)
6479 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6480 filename_ptr
, functionname_ptr
,
6483 if (!*functionname_ptr
)
6484 elf_find_function (abfd
, section
, symbols
, offset
,
6485 *filename_ptr
? NULL
: filename_ptr
,
6491 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6492 filename_ptr
, functionname_ptr
,
6494 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6496 if (!*functionname_ptr
)
6497 elf_find_function (abfd
, section
, symbols
, offset
,
6498 *filename_ptr
? NULL
: filename_ptr
,
6504 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6505 &found
, filename_ptr
,
6506 functionname_ptr
, line_ptr
,
6507 &elf_tdata (abfd
)->line_info
))
6509 if (found
&& (*functionname_ptr
|| *line_ptr
))
6512 if (symbols
== NULL
)
6515 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6516 filename_ptr
, functionname_ptr
))
6524 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6528 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6530 ret
+= get_program_header_size (abfd
);
6535 _bfd_elf_set_section_contents (bfd
*abfd
,
6537 const void *location
,
6539 bfd_size_type count
)
6541 Elf_Internal_Shdr
*hdr
;
6544 if (! abfd
->output_has_begun
6545 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6548 hdr
= &elf_section_data (section
)->this_hdr
;
6549 pos
= hdr
->sh_offset
+ offset
;
6550 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6551 || bfd_bwrite (location
, count
, abfd
) != count
)
6558 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6559 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6560 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6565 /* Try to convert a non-ELF reloc into an ELF one. */
6568 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6570 /* Check whether we really have an ELF howto. */
6572 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6574 bfd_reloc_code_real_type code
;
6575 reloc_howto_type
*howto
;
6577 /* Alien reloc: Try to determine its type to replace it with an
6578 equivalent ELF reloc. */
6580 if (areloc
->howto
->pc_relative
)
6582 switch (areloc
->howto
->bitsize
)
6585 code
= BFD_RELOC_8_PCREL
;
6588 code
= BFD_RELOC_12_PCREL
;
6591 code
= BFD_RELOC_16_PCREL
;
6594 code
= BFD_RELOC_24_PCREL
;
6597 code
= BFD_RELOC_32_PCREL
;
6600 code
= BFD_RELOC_64_PCREL
;
6606 howto
= bfd_reloc_type_lookup (abfd
, code
);
6608 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6610 if (howto
->pcrel_offset
)
6611 areloc
->addend
+= areloc
->address
;
6613 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6618 switch (areloc
->howto
->bitsize
)
6624 code
= BFD_RELOC_14
;
6627 code
= BFD_RELOC_16
;
6630 code
= BFD_RELOC_26
;
6633 code
= BFD_RELOC_32
;
6636 code
= BFD_RELOC_64
;
6642 howto
= bfd_reloc_type_lookup (abfd
, code
);
6646 areloc
->howto
= howto
;
6654 (*_bfd_error_handler
)
6655 (_("%B: unsupported relocation type %s"),
6656 abfd
, areloc
->howto
->name
);
6657 bfd_set_error (bfd_error_bad_value
);
6662 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6664 if (bfd_get_format (abfd
) == bfd_object
)
6666 if (elf_shstrtab (abfd
) != NULL
)
6667 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6670 return _bfd_generic_close_and_cleanup (abfd
);
6673 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6674 in the relocation's offset. Thus we cannot allow any sort of sanity
6675 range-checking to interfere. There is nothing else to do in processing
6678 bfd_reloc_status_type
6679 _bfd_elf_rel_vtable_reloc_fn
6680 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6681 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6682 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6683 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6685 return bfd_reloc_ok
;
6688 /* Elf core file support. Much of this only works on native
6689 toolchains, since we rely on knowing the
6690 machine-dependent procfs structure in order to pick
6691 out details about the corefile. */
6693 #ifdef HAVE_SYS_PROCFS_H
6694 # include <sys/procfs.h>
6697 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6700 elfcore_make_pid (bfd
*abfd
)
6702 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6703 + (elf_tdata (abfd
)->core_pid
));
6706 /* If there isn't a section called NAME, make one, using
6707 data from SECT. Note, this function will generate a
6708 reference to NAME, so you shouldn't deallocate or
6712 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6716 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6719 sect2
= bfd_make_section (abfd
, name
);
6723 sect2
->size
= sect
->size
;
6724 sect2
->filepos
= sect
->filepos
;
6725 sect2
->flags
= sect
->flags
;
6726 sect2
->alignment_power
= sect
->alignment_power
;
6730 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6731 actually creates up to two pseudosections:
6732 - For the single-threaded case, a section named NAME, unless
6733 such a section already exists.
6734 - For the multi-threaded case, a section named "NAME/PID", where
6735 PID is elfcore_make_pid (abfd).
6736 Both pseudosections have identical contents. */
6738 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6744 char *threaded_name
;
6748 /* Build the section name. */
6750 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6751 len
= strlen (buf
) + 1;
6752 threaded_name
= bfd_alloc (abfd
, len
);
6753 if (threaded_name
== NULL
)
6755 memcpy (threaded_name
, buf
, len
);
6757 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6761 sect
->filepos
= filepos
;
6762 sect
->flags
= SEC_HAS_CONTENTS
;
6763 sect
->alignment_power
= 2;
6765 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6768 /* prstatus_t exists on:
6770 linux 2.[01] + glibc
6774 #if defined (HAVE_PRSTATUS_T)
6777 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6782 if (note
->descsz
== sizeof (prstatus_t
))
6786 size
= sizeof (prstat
.pr_reg
);
6787 offset
= offsetof (prstatus_t
, pr_reg
);
6788 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6790 /* Do not overwrite the core signal if it
6791 has already been set by another thread. */
6792 if (elf_tdata (abfd
)->core_signal
== 0)
6793 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6794 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6796 /* pr_who exists on:
6799 pr_who doesn't exist on:
6802 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6803 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6806 #if defined (HAVE_PRSTATUS32_T)
6807 else if (note
->descsz
== sizeof (prstatus32_t
))
6809 /* 64-bit host, 32-bit corefile */
6810 prstatus32_t prstat
;
6812 size
= sizeof (prstat
.pr_reg
);
6813 offset
= offsetof (prstatus32_t
, pr_reg
);
6814 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6816 /* Do not overwrite the core signal if it
6817 has already been set by another thread. */
6818 if (elf_tdata (abfd
)->core_signal
== 0)
6819 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6820 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6822 /* pr_who exists on:
6825 pr_who doesn't exist on:
6828 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6829 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6832 #endif /* HAVE_PRSTATUS32_T */
6835 /* Fail - we don't know how to handle any other
6836 note size (ie. data object type). */
6840 /* Make a ".reg/999" section and a ".reg" section. */
6841 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6842 size
, note
->descpos
+ offset
);
6844 #endif /* defined (HAVE_PRSTATUS_T) */
6846 /* Create a pseudosection containing the exact contents of NOTE. */
6848 elfcore_make_note_pseudosection (bfd
*abfd
,
6850 Elf_Internal_Note
*note
)
6852 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6853 note
->descsz
, note
->descpos
);
6856 /* There isn't a consistent prfpregset_t across platforms,
6857 but it doesn't matter, because we don't have to pick this
6858 data structure apart. */
6861 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6863 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6866 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6867 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6871 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6873 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6876 #if defined (HAVE_PRPSINFO_T)
6877 typedef prpsinfo_t elfcore_psinfo_t
;
6878 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6879 typedef prpsinfo32_t elfcore_psinfo32_t
;
6883 #if defined (HAVE_PSINFO_T)
6884 typedef psinfo_t elfcore_psinfo_t
;
6885 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6886 typedef psinfo32_t elfcore_psinfo32_t
;
6890 /* return a malloc'ed copy of a string at START which is at
6891 most MAX bytes long, possibly without a terminating '\0'.
6892 the copy will always have a terminating '\0'. */
6895 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6898 char *end
= memchr (start
, '\0', max
);
6906 dups
= bfd_alloc (abfd
, len
+ 1);
6910 memcpy (dups
, start
, len
);
6916 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6918 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6920 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6922 elfcore_psinfo_t psinfo
;
6924 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6926 elf_tdata (abfd
)->core_program
6927 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6928 sizeof (psinfo
.pr_fname
));
6930 elf_tdata (abfd
)->core_command
6931 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6932 sizeof (psinfo
.pr_psargs
));
6934 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6935 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6937 /* 64-bit host, 32-bit corefile */
6938 elfcore_psinfo32_t psinfo
;
6940 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6942 elf_tdata (abfd
)->core_program
6943 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6944 sizeof (psinfo
.pr_fname
));
6946 elf_tdata (abfd
)->core_command
6947 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6948 sizeof (psinfo
.pr_psargs
));
6954 /* Fail - we don't know how to handle any other
6955 note size (ie. data object type). */
6959 /* Note that for some reason, a spurious space is tacked
6960 onto the end of the args in some (at least one anyway)
6961 implementations, so strip it off if it exists. */
6964 char *command
= elf_tdata (abfd
)->core_command
;
6965 int n
= strlen (command
);
6967 if (0 < n
&& command
[n
- 1] == ' ')
6968 command
[n
- 1] = '\0';
6973 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6975 #if defined (HAVE_PSTATUS_T)
6977 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6979 if (note
->descsz
== sizeof (pstatus_t
)
6980 #if defined (HAVE_PXSTATUS_T)
6981 || note
->descsz
== sizeof (pxstatus_t
)
6987 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6989 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6991 #if defined (HAVE_PSTATUS32_T)
6992 else if (note
->descsz
== sizeof (pstatus32_t
))
6994 /* 64-bit host, 32-bit corefile */
6997 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6999 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7002 /* Could grab some more details from the "representative"
7003 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7004 NT_LWPSTATUS note, presumably. */
7008 #endif /* defined (HAVE_PSTATUS_T) */
7010 #if defined (HAVE_LWPSTATUS_T)
7012 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7014 lwpstatus_t lwpstat
;
7020 if (note
->descsz
!= sizeof (lwpstat
)
7021 #if defined (HAVE_LWPXSTATUS_T)
7022 && note
->descsz
!= sizeof (lwpxstatus_t
)
7027 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7029 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7030 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7032 /* Make a ".reg/999" section. */
7034 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7035 len
= strlen (buf
) + 1;
7036 name
= bfd_alloc (abfd
, len
);
7039 memcpy (name
, buf
, len
);
7041 sect
= bfd_make_section_anyway (abfd
, name
);
7045 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7046 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7047 sect
->filepos
= note
->descpos
7048 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7051 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7052 sect
->size
= sizeof (lwpstat
.pr_reg
);
7053 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7056 sect
->flags
= SEC_HAS_CONTENTS
;
7057 sect
->alignment_power
= 2;
7059 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7062 /* Make a ".reg2/999" section */
7064 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7065 len
= strlen (buf
) + 1;
7066 name
= bfd_alloc (abfd
, len
);
7069 memcpy (name
, buf
, len
);
7071 sect
= bfd_make_section_anyway (abfd
, name
);
7075 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7076 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7077 sect
->filepos
= note
->descpos
7078 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7081 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7082 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7083 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7086 sect
->flags
= SEC_HAS_CONTENTS
;
7087 sect
->alignment_power
= 2;
7089 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7091 #endif /* defined (HAVE_LWPSTATUS_T) */
7093 #if defined (HAVE_WIN32_PSTATUS_T)
7095 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7101 win32_pstatus_t pstatus
;
7103 if (note
->descsz
< sizeof (pstatus
))
7106 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7108 switch (pstatus
.data_type
)
7110 case NOTE_INFO_PROCESS
:
7111 /* FIXME: need to add ->core_command. */
7112 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7113 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7116 case NOTE_INFO_THREAD
:
7117 /* Make a ".reg/999" section. */
7118 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7120 len
= strlen (buf
) + 1;
7121 name
= bfd_alloc (abfd
, len
);
7125 memcpy (name
, buf
, len
);
7127 sect
= bfd_make_section_anyway (abfd
, name
);
7131 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7132 sect
->filepos
= (note
->descpos
7133 + offsetof (struct win32_pstatus
,
7134 data
.thread_info
.thread_context
));
7135 sect
->flags
= SEC_HAS_CONTENTS
;
7136 sect
->alignment_power
= 2;
7138 if (pstatus
.data
.thread_info
.is_active_thread
)
7139 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7143 case NOTE_INFO_MODULE
:
7144 /* Make a ".module/xxxxxxxx" section. */
7145 sprintf (buf
, ".module/%08lx",
7146 (long) pstatus
.data
.module_info
.base_address
);
7148 len
= strlen (buf
) + 1;
7149 name
= bfd_alloc (abfd
, len
);
7153 memcpy (name
, buf
, len
);
7155 sect
= bfd_make_section_anyway (abfd
, name
);
7160 sect
->size
= note
->descsz
;
7161 sect
->filepos
= note
->descpos
;
7162 sect
->flags
= SEC_HAS_CONTENTS
;
7163 sect
->alignment_power
= 2;
7172 #endif /* HAVE_WIN32_PSTATUS_T */
7175 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7177 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7185 if (bed
->elf_backend_grok_prstatus
)
7186 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7188 #if defined (HAVE_PRSTATUS_T)
7189 return elfcore_grok_prstatus (abfd
, note
);
7194 #if defined (HAVE_PSTATUS_T)
7196 return elfcore_grok_pstatus (abfd
, note
);
7199 #if defined (HAVE_LWPSTATUS_T)
7201 return elfcore_grok_lwpstatus (abfd
, note
);
7204 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7205 return elfcore_grok_prfpreg (abfd
, note
);
7207 #if defined (HAVE_WIN32_PSTATUS_T)
7208 case NT_WIN32PSTATUS
:
7209 return elfcore_grok_win32pstatus (abfd
, note
);
7212 case NT_PRXFPREG
: /* Linux SSE extension */
7213 if (note
->namesz
== 6
7214 && strcmp (note
->namedata
, "LINUX") == 0)
7215 return elfcore_grok_prxfpreg (abfd
, note
);
7221 if (bed
->elf_backend_grok_psinfo
)
7222 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7224 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7225 return elfcore_grok_psinfo (abfd
, note
);
7232 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7236 sect
->size
= note
->descsz
;
7237 sect
->filepos
= note
->descpos
;
7238 sect
->flags
= SEC_HAS_CONTENTS
;
7239 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7247 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7251 cp
= strchr (note
->namedata
, '@');
7254 *lwpidp
= atoi(cp
+ 1);
7261 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7264 /* Signal number at offset 0x08. */
7265 elf_tdata (abfd
)->core_signal
7266 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7268 /* Process ID at offset 0x50. */
7269 elf_tdata (abfd
)->core_pid
7270 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7272 /* Command name at 0x7c (max 32 bytes, including nul). */
7273 elf_tdata (abfd
)->core_command
7274 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7276 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7281 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7285 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7286 elf_tdata (abfd
)->core_lwpid
= lwp
;
7288 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7290 /* NetBSD-specific core "procinfo". Note that we expect to
7291 find this note before any of the others, which is fine,
7292 since the kernel writes this note out first when it
7293 creates a core file. */
7295 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7298 /* As of Jan 2002 there are no other machine-independent notes
7299 defined for NetBSD core files. If the note type is less
7300 than the start of the machine-dependent note types, we don't
7303 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7307 switch (bfd_get_arch (abfd
))
7309 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7310 PT_GETFPREGS == mach+2. */
7312 case bfd_arch_alpha
:
7313 case bfd_arch_sparc
:
7316 case NT_NETBSDCORE_FIRSTMACH
+0:
7317 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7319 case NT_NETBSDCORE_FIRSTMACH
+2:
7320 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7326 /* On all other arch's, PT_GETREGS == mach+1 and
7327 PT_GETFPREGS == mach+3. */
7332 case NT_NETBSDCORE_FIRSTMACH
+1:
7333 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7335 case NT_NETBSDCORE_FIRSTMACH
+3:
7336 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7346 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7348 void *ddata
= note
->descdata
;
7355 /* nto_procfs_status 'pid' field is at offset 0. */
7356 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7358 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7359 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7361 /* nto_procfs_status 'flags' field is at offset 8. */
7362 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7364 /* nto_procfs_status 'what' field is at offset 14. */
7365 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7367 elf_tdata (abfd
)->core_signal
= sig
;
7368 elf_tdata (abfd
)->core_lwpid
= *tid
;
7371 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7372 do not come from signals so we make sure we set the current
7373 thread just in case. */
7374 if (flags
& 0x00000080)
7375 elf_tdata (abfd
)->core_lwpid
= *tid
;
7377 /* Make a ".qnx_core_status/%d" section. */
7378 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7380 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7385 sect
= bfd_make_section_anyway (abfd
, name
);
7389 sect
->size
= note
->descsz
;
7390 sect
->filepos
= note
->descpos
;
7391 sect
->flags
= SEC_HAS_CONTENTS
;
7392 sect
->alignment_power
= 2;
7394 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7398 elfcore_grok_nto_regs (bfd
*abfd
,
7399 Elf_Internal_Note
*note
,
7407 /* Make a "(base)/%d" section. */
7408 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7410 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7415 sect
= bfd_make_section_anyway (abfd
, name
);
7419 sect
->size
= note
->descsz
;
7420 sect
->filepos
= note
->descpos
;
7421 sect
->flags
= SEC_HAS_CONTENTS
;
7422 sect
->alignment_power
= 2;
7424 /* This is the current thread. */
7425 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7426 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7431 #define BFD_QNT_CORE_INFO 7
7432 #define BFD_QNT_CORE_STATUS 8
7433 #define BFD_QNT_CORE_GREG 9
7434 #define BFD_QNT_CORE_FPREG 10
7437 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7439 /* Every GREG section has a STATUS section before it. Store the
7440 tid from the previous call to pass down to the next gregs
7442 static pid_t tid
= 1;
7446 case BFD_QNT_CORE_INFO
:
7447 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7448 case BFD_QNT_CORE_STATUS
:
7449 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7450 case BFD_QNT_CORE_GREG
:
7451 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7452 case BFD_QNT_CORE_FPREG
:
7453 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7459 /* Function: elfcore_write_note
7466 size of data for note
7469 End of buffer containing note. */
7472 elfcore_write_note (bfd
*abfd
,
7480 Elf_External_Note
*xnp
;
7490 const struct elf_backend_data
*bed
;
7492 namesz
= strlen (name
) + 1;
7493 bed
= get_elf_backend_data (abfd
);
7494 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7497 newspace
= 12 + namesz
+ pad
+ size
;
7499 p
= realloc (buf
, *bufsiz
+ newspace
);
7501 *bufsiz
+= newspace
;
7502 xnp
= (Elf_External_Note
*) dest
;
7503 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7504 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7505 H_PUT_32 (abfd
, type
, xnp
->type
);
7509 memcpy (dest
, name
, namesz
);
7517 memcpy (dest
, input
, size
);
7521 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7523 elfcore_write_prpsinfo (bfd
*abfd
,
7530 char *note_name
= "CORE";
7532 #if defined (HAVE_PSINFO_T)
7534 note_type
= NT_PSINFO
;
7537 note_type
= NT_PRPSINFO
;
7540 memset (&data
, 0, sizeof (data
));
7541 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7542 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7543 return elfcore_write_note (abfd
, buf
, bufsiz
,
7544 note_name
, note_type
, &data
, sizeof (data
));
7546 #endif /* PSINFO_T or PRPSINFO_T */
7548 #if defined (HAVE_PRSTATUS_T)
7550 elfcore_write_prstatus (bfd
*abfd
,
7558 char *note_name
= "CORE";
7560 memset (&prstat
, 0, sizeof (prstat
));
7561 prstat
.pr_pid
= pid
;
7562 prstat
.pr_cursig
= cursig
;
7563 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7564 return elfcore_write_note (abfd
, buf
, bufsiz
,
7565 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7567 #endif /* HAVE_PRSTATUS_T */
7569 #if defined (HAVE_LWPSTATUS_T)
7571 elfcore_write_lwpstatus (bfd
*abfd
,
7578 lwpstatus_t lwpstat
;
7579 char *note_name
= "CORE";
7581 memset (&lwpstat
, 0, sizeof (lwpstat
));
7582 lwpstat
.pr_lwpid
= pid
>> 16;
7583 lwpstat
.pr_cursig
= cursig
;
7584 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7585 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7586 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7588 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7589 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7591 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7592 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7595 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7596 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7598 #endif /* HAVE_LWPSTATUS_T */
7600 #if defined (HAVE_PSTATUS_T)
7602 elfcore_write_pstatus (bfd
*abfd
,
7610 char *note_name
= "CORE";
7612 memset (&pstat
, 0, sizeof (pstat
));
7613 pstat
.pr_pid
= pid
& 0xffff;
7614 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7615 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7618 #endif /* HAVE_PSTATUS_T */
7621 elfcore_write_prfpreg (bfd
*abfd
,
7627 char *note_name
= "CORE";
7628 return elfcore_write_note (abfd
, buf
, bufsiz
,
7629 note_name
, NT_FPREGSET
, fpregs
, size
);
7633 elfcore_write_prxfpreg (bfd
*abfd
,
7636 const void *xfpregs
,
7639 char *note_name
= "LINUX";
7640 return elfcore_write_note (abfd
, buf
, bufsiz
,
7641 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7645 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7653 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7656 buf
= bfd_malloc (size
);
7660 if (bfd_bread (buf
, size
, abfd
) != size
)
7668 while (p
< buf
+ size
)
7670 /* FIXME: bad alignment assumption. */
7671 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7672 Elf_Internal_Note in
;
7674 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7676 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7677 in
.namedata
= xnp
->name
;
7679 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7680 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7681 in
.descpos
= offset
+ (in
.descdata
- buf
);
7683 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7685 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7688 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7690 if (! elfcore_grok_nto_note (abfd
, &in
))
7695 if (! elfcore_grok_note (abfd
, &in
))
7699 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7706 /* Providing external access to the ELF program header table. */
7708 /* Return an upper bound on the number of bytes required to store a
7709 copy of ABFD's program header table entries. Return -1 if an error
7710 occurs; bfd_get_error will return an appropriate code. */
7713 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7715 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7717 bfd_set_error (bfd_error_wrong_format
);
7721 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7724 /* Copy ABFD's program header table entries to *PHDRS. The entries
7725 will be stored as an array of Elf_Internal_Phdr structures, as
7726 defined in include/elf/internal.h. To find out how large the
7727 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7729 Return the number of program header table entries read, or -1 if an
7730 error occurs; bfd_get_error will return an appropriate code. */
7733 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7737 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7739 bfd_set_error (bfd_error_wrong_format
);
7743 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7744 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7745 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7751 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7754 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7756 i_ehdrp
= elf_elfheader (abfd
);
7757 if (i_ehdrp
== NULL
)
7758 sprintf_vma (buf
, value
);
7761 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7763 #if BFD_HOST_64BIT_LONG
7764 sprintf (buf
, "%016lx", value
);
7766 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7767 _bfd_int64_low (value
));
7771 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7774 sprintf_vma (buf
, value
);
7779 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7782 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7784 i_ehdrp
= elf_elfheader (abfd
);
7785 if (i_ehdrp
== NULL
)
7786 fprintf_vma ((FILE *) stream
, value
);
7789 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7791 #if BFD_HOST_64BIT_LONG
7792 fprintf ((FILE *) stream
, "%016lx", value
);
7794 fprintf ((FILE *) stream
, "%08lx%08lx",
7795 _bfd_int64_high (value
), _bfd_int64_low (value
));
7799 fprintf ((FILE *) stream
, "%08lx",
7800 (unsigned long) (value
& 0xffffffff));
7803 fprintf_vma ((FILE *) stream
, value
);
7807 enum elf_reloc_type_class
7808 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7810 return reloc_class_normal
;
7813 /* For RELA architectures, return the relocation value for a
7814 relocation against a local symbol. */
7817 _bfd_elf_rela_local_sym (bfd
*abfd
,
7818 Elf_Internal_Sym
*sym
,
7820 Elf_Internal_Rela
*rel
)
7822 asection
*sec
= *psec
;
7825 relocation
= (sec
->output_section
->vma
7826 + sec
->output_offset
7828 if ((sec
->flags
& SEC_MERGE
)
7829 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7830 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7833 _bfd_merged_section_offset (abfd
, psec
,
7834 elf_section_data (sec
)->sec_info
,
7835 sym
->st_value
+ rel
->r_addend
);
7838 /* If we have changed the section, and our original section is
7839 marked with SEC_EXCLUDE, it means that the original
7840 SEC_MERGE section has been completely subsumed in some
7841 other SEC_MERGE section. In this case, we need to leave
7842 some info around for --emit-relocs. */
7843 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7844 sec
->kept_section
= *psec
;
7847 rel
->r_addend
-= relocation
;
7848 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7854 _bfd_elf_rel_local_sym (bfd
*abfd
,
7855 Elf_Internal_Sym
*sym
,
7859 asection
*sec
= *psec
;
7861 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7862 return sym
->st_value
+ addend
;
7864 return _bfd_merged_section_offset (abfd
, psec
,
7865 elf_section_data (sec
)->sec_info
,
7866 sym
->st_value
+ addend
);
7870 _bfd_elf_section_offset (bfd
*abfd
,
7871 struct bfd_link_info
*info
,
7875 switch (sec
->sec_info_type
)
7877 case ELF_INFO_TYPE_STABS
:
7878 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7880 case ELF_INFO_TYPE_EH_FRAME
:
7881 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
7887 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7888 reconstruct an ELF file by reading the segments out of remote memory
7889 based on the ELF file header at EHDR_VMA and the ELF program headers it
7890 points to. If not null, *LOADBASEP is filled in with the difference
7891 between the VMAs from which the segments were read, and the VMAs the
7892 file headers (and hence BFD's idea of each section's VMA) put them at.
7894 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7895 remote memory at target address VMA into the local buffer at MYADDR; it
7896 should return zero on success or an `errno' code on failure. TEMPL must
7897 be a BFD for an ELF target with the word size and byte order found in
7898 the remote memory. */
7901 bfd_elf_bfd_from_remote_memory
7905 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
7907 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7908 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7912 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
7913 long symcount ATTRIBUTE_UNUSED
,
7914 asymbol
**syms ATTRIBUTE_UNUSED
,
7919 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7922 const char *relplt_name
;
7923 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7927 Elf_Internal_Shdr
*hdr
;
7933 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
7936 if (dynsymcount
<= 0)
7939 if (!bed
->plt_sym_val
)
7942 relplt_name
= bed
->relplt_name
;
7943 if (relplt_name
== NULL
)
7944 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7945 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7949 hdr
= &elf_section_data (relplt
)->this_hdr
;
7950 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7951 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7954 plt
= bfd_get_section_by_name (abfd
, ".plt");
7958 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7959 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7962 count
= relplt
->size
/ hdr
->sh_entsize
;
7963 size
= count
* sizeof (asymbol
);
7964 p
= relplt
->relocation
;
7965 for (i
= 0; i
< count
; i
++, s
++, p
++)
7966 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7968 s
= *ret
= bfd_malloc (size
);
7972 names
= (char *) (s
+ count
);
7973 p
= relplt
->relocation
;
7975 for (i
= 0; i
< count
; i
++, s
++, p
++)
7980 addr
= bed
->plt_sym_val (i
, plt
, p
);
7981 if (addr
== (bfd_vma
) -1)
7984 *s
= **p
->sym_ptr_ptr
;
7986 s
->value
= addr
- plt
->vma
;
7988 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7989 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7991 memcpy (names
, "@plt", sizeof ("@plt"));
7992 names
+= sizeof ("@plt");
7999 /* Sort symbol by binding and section. We want to put definitions
8000 sorted by section at the beginning. */
8003 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8005 const Elf_Internal_Sym
*s1
;
8006 const Elf_Internal_Sym
*s2
;
8009 /* Make sure that undefined symbols are at the end. */
8010 s1
= (const Elf_Internal_Sym
*) arg1
;
8011 if (s1
->st_shndx
== SHN_UNDEF
)
8013 s2
= (const Elf_Internal_Sym
*) arg2
;
8014 if (s2
->st_shndx
== SHN_UNDEF
)
8017 /* Sorted by section index. */
8018 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8022 /* Sorted by binding. */
8023 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8028 Elf_Internal_Sym
*sym
;
8033 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8035 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8036 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8037 return strcmp (s1
->name
, s2
->name
);
8040 /* Check if 2 sections define the same set of local and global
8044 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8047 const struct elf_backend_data
*bed1
, *bed2
;
8048 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8049 bfd_size_type symcount1
, symcount2
;
8050 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8051 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8052 Elf_Internal_Sym
*isymend
;
8053 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8054 bfd_size_type count1
, count2
, i
;
8061 /* If both are .gnu.linkonce sections, they have to have the same
8063 if (strncmp (sec1
->name
, ".gnu.linkonce",
8064 sizeof ".gnu.linkonce" - 1) == 0
8065 && strncmp (sec2
->name
, ".gnu.linkonce",
8066 sizeof ".gnu.linkonce" - 1) == 0)
8067 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8068 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8070 /* Both sections have to be in ELF. */
8071 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8072 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8075 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8078 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8079 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8081 /* If both are members of section groups, they have to have the
8083 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8087 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8088 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8089 if (shndx1
== -1 || shndx2
== -1)
8092 bed1
= get_elf_backend_data (bfd1
);
8093 bed2
= get_elf_backend_data (bfd2
);
8094 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8095 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8096 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8097 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8099 if (symcount1
== 0 || symcount2
== 0)
8102 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8104 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8108 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8111 /* Sort symbols by binding and section. Global definitions are at
8113 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8114 elf_sort_elf_symbol
);
8115 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8116 elf_sort_elf_symbol
);
8118 /* Count definitions in the section. */
8120 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8121 isym
< isymend
; isym
++)
8123 if (isym
->st_shndx
== (unsigned int) shndx1
)
8130 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8135 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8136 isym
< isymend
; isym
++)
8138 if (isym
->st_shndx
== (unsigned int) shndx2
)
8145 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8149 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8152 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8153 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8155 if (symtable1
== NULL
|| symtable2
== NULL
)
8159 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8160 isym
< isymend
; isym
++)
8163 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8170 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8171 isym
< isymend
; isym
++)
8174 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8180 /* Sort symbol by name. */
8181 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8182 elf_sym_name_compare
);
8183 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8184 elf_sym_name_compare
);
8186 for (i
= 0; i
< count1
; i
++)
8187 /* Two symbols must have the same binding, type and name. */
8188 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8189 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8190 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)