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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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;
210 bfd_elf_mkobject (bfd
*abfd
)
212 /* This just does initialization. */
213 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
214 elf_tdata (abfd
) = bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
215 if (elf_tdata (abfd
) == 0)
217 /* Since everything is done at close time, do we need any
224 bfd_elf_mkcorefile (bfd
*abfd
)
226 /* I think this can be done just like an object file. */
227 return bfd_elf_mkobject (abfd
);
231 bfd_elf_get_str_section (bfd
*abfd
, unsigned int shindex
)
233 Elf_Internal_Shdr
**i_shdrp
;
234 bfd_byte
*shstrtab
= NULL
;
236 bfd_size_type shstrtabsize
;
238 i_shdrp
= elf_elfsections (abfd
);
239 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
242 shstrtab
= i_shdrp
[shindex
]->contents
;
243 if (shstrtab
== NULL
)
245 /* No cached one, attempt to read, and cache what we read. */
246 offset
= i_shdrp
[shindex
]->sh_offset
;
247 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
249 /* Allocate and clear an extra byte at the end, to prevent crashes
250 in case the string table is not terminated. */
251 if (shstrtabsize
+ 1 == 0
252 || (shstrtab
= bfd_alloc (abfd
, shstrtabsize
+ 1)) == NULL
253 || bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
255 else if (bfd_bread (shstrtab
, shstrtabsize
, abfd
) != shstrtabsize
)
257 if (bfd_get_error () != bfd_error_system_call
)
258 bfd_set_error (bfd_error_file_truncated
);
262 shstrtab
[shstrtabsize
] = '\0';
263 i_shdrp
[shindex
]->contents
= shstrtab
;
265 return (char *) shstrtab
;
269 bfd_elf_string_from_elf_section (bfd
*abfd
,
270 unsigned int shindex
,
271 unsigned int strindex
)
273 Elf_Internal_Shdr
*hdr
;
278 hdr
= elf_elfsections (abfd
)[shindex
];
280 if (hdr
->contents
== NULL
281 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
284 if (strindex
>= hdr
->sh_size
)
286 unsigned int shstrndx
= elf_elfheader(abfd
)->e_shstrndx
;
287 (*_bfd_error_handler
)
288 (_("%B: invalid string offset %u >= %lu for section `%s'"),
289 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
290 (shindex
== shstrndx
&& strindex
== hdr
->sh_name
292 : bfd_elf_string_from_elf_section (abfd
, shstrndx
, hdr
->sh_name
)));
296 return ((char *) hdr
->contents
) + strindex
;
299 /* Read and convert symbols to internal format.
300 SYMCOUNT specifies the number of symbols to read, starting from
301 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
302 are non-NULL, they are used to store the internal symbols, external
303 symbols, and symbol section index extensions, respectively. */
306 bfd_elf_get_elf_syms (bfd
*ibfd
,
307 Elf_Internal_Shdr
*symtab_hdr
,
310 Elf_Internal_Sym
*intsym_buf
,
312 Elf_External_Sym_Shndx
*extshndx_buf
)
314 Elf_Internal_Shdr
*shndx_hdr
;
316 const bfd_byte
*esym
;
317 Elf_External_Sym_Shndx
*alloc_extshndx
;
318 Elf_External_Sym_Shndx
*shndx
;
319 Elf_Internal_Sym
*isym
;
320 Elf_Internal_Sym
*isymend
;
321 const struct elf_backend_data
*bed
;
329 /* Normal syms might have section extension entries. */
331 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
332 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
334 /* Read the symbols. */
336 alloc_extshndx
= NULL
;
337 bed
= get_elf_backend_data (ibfd
);
338 extsym_size
= bed
->s
->sizeof_sym
;
339 amt
= symcount
* extsym_size
;
340 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
341 if (extsym_buf
== NULL
)
343 alloc_ext
= bfd_malloc2 (symcount
, extsym_size
);
344 extsym_buf
= alloc_ext
;
346 if (extsym_buf
== NULL
347 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
348 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
354 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
358 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
359 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
360 if (extshndx_buf
== NULL
)
362 alloc_extshndx
= bfd_malloc2 (symcount
,
363 sizeof (Elf_External_Sym_Shndx
));
364 extshndx_buf
= alloc_extshndx
;
366 if (extshndx_buf
== NULL
367 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
368 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
375 if (intsym_buf
== NULL
)
377 intsym_buf
= bfd_malloc2 (symcount
, sizeof (Elf_Internal_Sym
));
378 if (intsym_buf
== NULL
)
382 /* Convert the symbols to internal form. */
383 isymend
= intsym_buf
+ symcount
;
384 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
386 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
387 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, shndx
, isym
);
390 if (alloc_ext
!= NULL
)
392 if (alloc_extshndx
!= NULL
)
393 free (alloc_extshndx
);
398 /* Look up a symbol name. */
400 bfd_elf_sym_name (bfd
*abfd
,
401 Elf_Internal_Shdr
*symtab_hdr
,
402 Elf_Internal_Sym
*isym
,
406 unsigned int iname
= isym
->st_name
;
407 unsigned int shindex
= symtab_hdr
->sh_link
;
409 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
410 /* Check for a bogus st_shndx to avoid crashing. */
411 && isym
->st_shndx
< elf_numsections (abfd
)
412 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
414 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
415 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
418 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
421 else if (sym_sec
&& *name
== '\0')
422 name
= bfd_section_name (abfd
, sym_sec
);
427 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
428 sections. The first element is the flags, the rest are section
431 typedef union elf_internal_group
{
432 Elf_Internal_Shdr
*shdr
;
434 } Elf_Internal_Group
;
436 /* Return the name of the group signature symbol. Why isn't the
437 signature just a string? */
440 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
442 Elf_Internal_Shdr
*hdr
;
443 unsigned char esym
[sizeof (Elf64_External_Sym
)];
444 Elf_External_Sym_Shndx eshndx
;
445 Elf_Internal_Sym isym
;
447 /* First we need to ensure the symbol table is available. Make sure
448 that it is a symbol table section. */
449 hdr
= elf_elfsections (abfd
) [ghdr
->sh_link
];
450 if (hdr
->sh_type
!= SHT_SYMTAB
451 || ! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
454 /* Go read the symbol. */
455 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
456 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
457 &isym
, esym
, &eshndx
) == NULL
)
460 return bfd_elf_sym_name (abfd
, hdr
, &isym
, NULL
);
463 /* Set next_in_group list pointer, and group name for NEWSECT. */
466 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
468 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
470 /* If num_group is zero, read in all SHT_GROUP sections. The count
471 is set to -1 if there are no SHT_GROUP sections. */
474 unsigned int i
, shnum
;
476 /* First count the number of groups. If we have a SHT_GROUP
477 section with just a flag word (ie. sh_size is 4), ignore it. */
478 shnum
= elf_numsections (abfd
);
480 for (i
= 0; i
< shnum
; i
++)
482 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
483 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
489 num_group
= (unsigned) -1;
490 elf_tdata (abfd
)->num_group
= num_group
;
494 /* We keep a list of elf section headers for group sections,
495 so we can find them quickly. */
498 elf_tdata (abfd
)->num_group
= num_group
;
499 elf_tdata (abfd
)->group_sect_ptr
500 = bfd_alloc2 (abfd
, num_group
, sizeof (Elf_Internal_Shdr
*));
501 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
505 for (i
= 0; i
< shnum
; i
++)
507 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
508 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
511 Elf_Internal_Group
*dest
;
513 /* Add to list of sections. */
514 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
517 /* Read the raw contents. */
518 BFD_ASSERT (sizeof (*dest
) >= 4);
519 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
520 shdr
->contents
= bfd_alloc2 (abfd
, shdr
->sh_size
,
522 if (shdr
->contents
== NULL
523 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
524 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
528 /* Translate raw contents, a flag word followed by an
529 array of elf section indices all in target byte order,
530 to the flag word followed by an array of elf section
532 src
= shdr
->contents
+ shdr
->sh_size
;
533 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
540 idx
= H_GET_32 (abfd
, src
);
541 if (src
== shdr
->contents
)
544 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
545 shdr
->bfd_section
->flags
546 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
551 ((*_bfd_error_handler
)
552 (_("%B: invalid SHT_GROUP entry"), abfd
));
555 dest
->shdr
= elf_elfsections (abfd
)[idx
];
562 if (num_group
!= (unsigned) -1)
566 for (i
= 0; i
< num_group
; i
++)
568 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
569 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
570 unsigned int n_elt
= shdr
->sh_size
/ 4;
572 /* Look through this group's sections to see if current
573 section is a member. */
575 if ((++idx
)->shdr
== hdr
)
579 /* We are a member of this group. Go looking through
580 other members to see if any others are linked via
582 idx
= (Elf_Internal_Group
*) shdr
->contents
;
583 n_elt
= shdr
->sh_size
/ 4;
585 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
586 && elf_next_in_group (s
) != NULL
)
590 /* Snarf the group name from other member, and
591 insert current section in circular list. */
592 elf_group_name (newsect
) = elf_group_name (s
);
593 elf_next_in_group (newsect
) = elf_next_in_group (s
);
594 elf_next_in_group (s
) = newsect
;
600 gname
= group_signature (abfd
, shdr
);
603 elf_group_name (newsect
) = gname
;
605 /* Start a circular list with one element. */
606 elf_next_in_group (newsect
) = newsect
;
609 /* If the group section has been created, point to the
611 if (shdr
->bfd_section
!= NULL
)
612 elf_next_in_group (shdr
->bfd_section
) = newsect
;
620 if (elf_group_name (newsect
) == NULL
)
622 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
629 _bfd_elf_setup_group_pointers (bfd
*abfd
)
632 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
633 bfd_boolean result
= TRUE
;
635 if (num_group
== (unsigned) -1)
638 for (i
= 0; i
< num_group
; i
++)
640 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
641 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
642 unsigned int n_elt
= shdr
->sh_size
/ 4;
645 if ((++idx
)->shdr
->bfd_section
)
646 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
647 else if (idx
->shdr
->sh_type
== SHT_RELA
648 || idx
->shdr
->sh_type
== SHT_REL
)
649 /* We won't include relocation sections in section groups in
650 output object files. We adjust the group section size here
651 so that relocatable link will work correctly when
652 relocation sections are in section group in input object
654 shdr
->bfd_section
->size
-= 4;
657 /* There are some unknown sections in the group. */
658 (*_bfd_error_handler
)
659 (_("%B: unknown [%d] section `%s' in group [%s]"),
661 (unsigned int) idx
->shdr
->sh_type
,
662 bfd_elf_string_from_elf_section (abfd
,
663 (elf_elfheader (abfd
)
666 shdr
->bfd_section
->name
);
674 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
676 return elf_next_in_group (sec
) != NULL
;
679 /* Make a BFD section from an ELF section. We store a pointer to the
680 BFD section in the bfd_section field of the header. */
683 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
684 Elf_Internal_Shdr
*hdr
,
690 const struct elf_backend_data
*bed
;
692 if (hdr
->bfd_section
!= NULL
)
694 BFD_ASSERT (strcmp (name
,
695 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
699 newsect
= bfd_make_section_anyway (abfd
, name
);
703 hdr
->bfd_section
= newsect
;
704 elf_section_data (newsect
)->this_hdr
= *hdr
;
705 elf_section_data (newsect
)->this_idx
= shindex
;
707 /* Always use the real type/flags. */
708 elf_section_type (newsect
) = hdr
->sh_type
;
709 elf_section_flags (newsect
) = hdr
->sh_flags
;
711 newsect
->filepos
= hdr
->sh_offset
;
713 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
714 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
715 || ! bfd_set_section_alignment (abfd
, newsect
,
716 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
719 flags
= SEC_NO_FLAGS
;
720 if (hdr
->sh_type
!= SHT_NOBITS
)
721 flags
|= SEC_HAS_CONTENTS
;
722 if (hdr
->sh_type
== SHT_GROUP
)
723 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
724 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
727 if (hdr
->sh_type
!= SHT_NOBITS
)
730 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
731 flags
|= SEC_READONLY
;
732 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
734 else if ((flags
& SEC_LOAD
) != 0)
736 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
739 newsect
->entsize
= hdr
->sh_entsize
;
740 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
741 flags
|= SEC_STRINGS
;
743 if (hdr
->sh_flags
& SHF_GROUP
)
744 if (!setup_group (abfd
, hdr
, newsect
))
746 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
747 flags
|= SEC_THREAD_LOCAL
;
749 if ((flags
& SEC_ALLOC
) == 0)
751 /* The debugging sections appear to be recognized only by name,
752 not any sort of flag. Their SEC_ALLOC bits are cleared. */
757 } debug_sections
[] =
759 { "debug", 5 }, /* 'd' */
760 { NULL
, 0 }, /* 'e' */
761 { NULL
, 0 }, /* 'f' */
762 { "gnu.linkonce.wi.", 17 }, /* 'g' */
763 { NULL
, 0 }, /* 'h' */
764 { NULL
, 0 }, /* 'i' */
765 { NULL
, 0 }, /* 'j' */
766 { NULL
, 0 }, /* 'k' */
767 { "line", 4 }, /* 'l' */
768 { NULL
, 0 }, /* 'm' */
769 { NULL
, 0 }, /* 'n' */
770 { NULL
, 0 }, /* 'o' */
771 { NULL
, 0 }, /* 'p' */
772 { NULL
, 0 }, /* 'q' */
773 { NULL
, 0 }, /* 'r' */
774 { "stab", 4 } /* 's' */
779 int i
= name
[1] - 'd';
781 && i
< (int) ARRAY_SIZE (debug_sections
)
782 && debug_sections
[i
].name
!= NULL
783 && strncmp (&name
[1], debug_sections
[i
].name
,
784 debug_sections
[i
].len
) == 0)
785 flags
|= SEC_DEBUGGING
;
789 /* As a GNU extension, if the name begins with .gnu.linkonce, we
790 only link a single copy of the section. This is used to support
791 g++. g++ will emit each template expansion in its own section.
792 The symbols will be defined as weak, so that multiple definitions
793 are permitted. The GNU linker extension is to actually discard
794 all but one of the sections. */
795 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
796 && elf_next_in_group (newsect
) == NULL
)
797 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
799 bed
= get_elf_backend_data (abfd
);
800 if (bed
->elf_backend_section_flags
)
801 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
804 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
807 if ((flags
& SEC_ALLOC
) != 0)
809 Elf_Internal_Phdr
*phdr
;
812 /* Look through the phdrs to see if we need to adjust the lma.
813 If all the p_paddr fields are zero, we ignore them, since
814 some ELF linkers produce such output. */
815 phdr
= elf_tdata (abfd
)->phdr
;
816 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
818 if (phdr
->p_paddr
!= 0)
821 if (i
< elf_elfheader (abfd
)->e_phnum
)
823 phdr
= elf_tdata (abfd
)->phdr
;
824 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
826 /* This section is part of this segment if its file
827 offset plus size lies within the segment's memory
828 span and, if the section is loaded, the extent of the
829 loaded data lies within the extent of the segment.
831 Note - we used to check the p_paddr field as well, and
832 refuse to set the LMA if it was 0. This is wrong
833 though, as a perfectly valid initialised segment can
834 have a p_paddr of zero. Some architectures, eg ARM,
835 place special significance on the address 0 and
836 executables need to be able to have a segment which
837 covers this address. */
838 if (phdr
->p_type
== PT_LOAD
839 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
840 && (hdr
->sh_offset
+ hdr
->sh_size
841 <= phdr
->p_offset
+ phdr
->p_memsz
)
842 && ((flags
& SEC_LOAD
) == 0
843 || (hdr
->sh_offset
+ hdr
->sh_size
844 <= phdr
->p_offset
+ phdr
->p_filesz
)))
846 if ((flags
& SEC_LOAD
) == 0)
847 newsect
->lma
= (phdr
->p_paddr
848 + hdr
->sh_addr
- phdr
->p_vaddr
);
850 /* We used to use the same adjustment for SEC_LOAD
851 sections, but that doesn't work if the segment
852 is packed with code from multiple VMAs.
853 Instead we calculate the section LMA based on
854 the segment LMA. It is assumed that the
855 segment will contain sections with contiguous
856 LMAs, even if the VMAs are not. */
857 newsect
->lma
= (phdr
->p_paddr
858 + hdr
->sh_offset
- phdr
->p_offset
);
860 /* With contiguous segments, we can't tell from file
861 offsets whether a section with zero size should
862 be placed at the end of one segment or the
863 beginning of the next. Decide based on vaddr. */
864 if (hdr
->sh_addr
>= phdr
->p_vaddr
865 && (hdr
->sh_addr
+ hdr
->sh_size
866 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
881 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
884 Helper functions for GDB to locate the string tables.
885 Since BFD hides string tables from callers, GDB needs to use an
886 internal hook to find them. Sun's .stabstr, in particular,
887 isn't even pointed to by the .stab section, so ordinary
888 mechanisms wouldn't work to find it, even if we had some.
891 struct elf_internal_shdr
*
892 bfd_elf_find_section (bfd
*abfd
, char *name
)
894 Elf_Internal_Shdr
**i_shdrp
;
899 i_shdrp
= elf_elfsections (abfd
);
902 shstrtab
= bfd_elf_get_str_section (abfd
,
903 elf_elfheader (abfd
)->e_shstrndx
);
904 if (shstrtab
!= NULL
)
906 max
= elf_numsections (abfd
);
907 for (i
= 1; i
< max
; i
++)
908 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
915 const char *const bfd_elf_section_type_names
[] = {
916 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
917 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
918 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
921 /* ELF relocs are against symbols. If we are producing relocatable
922 output, and the reloc is against an external symbol, and nothing
923 has given us any additional addend, the resulting reloc will also
924 be against the same symbol. In such a case, we don't want to
925 change anything about the way the reloc is handled, since it will
926 all be done at final link time. Rather than put special case code
927 into bfd_perform_relocation, all the reloc types use this howto
928 function. It just short circuits the reloc if producing
929 relocatable output against an external symbol. */
931 bfd_reloc_status_type
932 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
933 arelent
*reloc_entry
,
935 void *data ATTRIBUTE_UNUSED
,
936 asection
*input_section
,
938 char **error_message ATTRIBUTE_UNUSED
)
940 if (output_bfd
!= NULL
941 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
942 && (! reloc_entry
->howto
->partial_inplace
943 || reloc_entry
->addend
== 0))
945 reloc_entry
->address
+= input_section
->output_offset
;
949 return bfd_reloc_continue
;
952 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
955 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
958 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
959 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
962 /* Finish SHF_MERGE section merging. */
965 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
970 if (!is_elf_hash_table (info
->hash
))
973 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
974 if ((ibfd
->flags
& DYNAMIC
) == 0)
975 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
976 if ((sec
->flags
& SEC_MERGE
) != 0
977 && !bfd_is_abs_section (sec
->output_section
))
979 struct bfd_elf_section_data
*secdata
;
981 secdata
= elf_section_data (sec
);
982 if (! _bfd_add_merge_section (abfd
,
983 &elf_hash_table (info
)->merge_info
,
984 sec
, &secdata
->sec_info
))
986 else if (secdata
->sec_info
)
987 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
990 if (elf_hash_table (info
)->merge_info
!= NULL
)
991 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
992 merge_sections_remove_hook
);
997 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
999 sec
->output_section
= bfd_abs_section_ptr
;
1000 sec
->output_offset
= sec
->vma
;
1001 if (!is_elf_hash_table (info
->hash
))
1004 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
1007 /* Copy the program header and other data from one object module to
1011 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
1013 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1014 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1017 BFD_ASSERT (!elf_flags_init (obfd
)
1018 || (elf_elfheader (obfd
)->e_flags
1019 == elf_elfheader (ibfd
)->e_flags
));
1021 elf_gp (obfd
) = elf_gp (ibfd
);
1022 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1023 elf_flags_init (obfd
) = TRUE
;
1027 /* Print out the program headers. */
1030 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1033 Elf_Internal_Phdr
*p
;
1035 bfd_byte
*dynbuf
= NULL
;
1037 p
= elf_tdata (abfd
)->phdr
;
1042 fprintf (f
, _("\nProgram Header:\n"));
1043 c
= elf_elfheader (abfd
)->e_phnum
;
1044 for (i
= 0; i
< c
; i
++, p
++)
1051 case PT_NULL
: pt
= "NULL"; break;
1052 case PT_LOAD
: pt
= "LOAD"; break;
1053 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1054 case PT_INTERP
: pt
= "INTERP"; break;
1055 case PT_NOTE
: pt
= "NOTE"; break;
1056 case PT_SHLIB
: pt
= "SHLIB"; break;
1057 case PT_PHDR
: pt
= "PHDR"; break;
1058 case PT_TLS
: pt
= "TLS"; break;
1059 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1060 case PT_GNU_STACK
: pt
= "STACK"; break;
1061 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1062 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1064 fprintf (f
, "%8s off 0x", pt
);
1065 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1066 fprintf (f
, " vaddr 0x");
1067 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1068 fprintf (f
, " paddr 0x");
1069 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1070 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1071 fprintf (f
, " filesz 0x");
1072 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1073 fprintf (f
, " memsz 0x");
1074 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1075 fprintf (f
, " flags %c%c%c",
1076 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1077 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1078 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1079 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1080 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1085 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1089 unsigned long shlink
;
1090 bfd_byte
*extdyn
, *extdynend
;
1092 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1094 fprintf (f
, _("\nDynamic Section:\n"));
1096 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1099 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1102 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1104 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1105 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1108 extdynend
= extdyn
+ s
->size
;
1109 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1111 Elf_Internal_Dyn dyn
;
1114 bfd_boolean stringp
;
1116 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1118 if (dyn
.d_tag
== DT_NULL
)
1125 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1129 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1130 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1131 case DT_PLTGOT
: name
= "PLTGOT"; break;
1132 case DT_HASH
: name
= "HASH"; break;
1133 case DT_STRTAB
: name
= "STRTAB"; break;
1134 case DT_SYMTAB
: name
= "SYMTAB"; break;
1135 case DT_RELA
: name
= "RELA"; break;
1136 case DT_RELASZ
: name
= "RELASZ"; break;
1137 case DT_RELAENT
: name
= "RELAENT"; break;
1138 case DT_STRSZ
: name
= "STRSZ"; break;
1139 case DT_SYMENT
: name
= "SYMENT"; break;
1140 case DT_INIT
: name
= "INIT"; break;
1141 case DT_FINI
: name
= "FINI"; break;
1142 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1143 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1144 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1145 case DT_REL
: name
= "REL"; break;
1146 case DT_RELSZ
: name
= "RELSZ"; break;
1147 case DT_RELENT
: name
= "RELENT"; break;
1148 case DT_PLTREL
: name
= "PLTREL"; break;
1149 case DT_DEBUG
: name
= "DEBUG"; break;
1150 case DT_TEXTREL
: name
= "TEXTREL"; break;
1151 case DT_JMPREL
: name
= "JMPREL"; break;
1152 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1153 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1154 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1155 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1156 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1157 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1158 case DT_FLAGS
: name
= "FLAGS"; break;
1159 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1160 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1161 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1162 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1163 case DT_MOVEENT
: name
= "MOVEENT"; break;
1164 case DT_MOVESZ
: name
= "MOVESZ"; break;
1165 case DT_FEATURE
: name
= "FEATURE"; break;
1166 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1167 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1168 case DT_SYMINENT
: name
= "SYMINENT"; break;
1169 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1170 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1171 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1172 case DT_PLTPAD
: name
= "PLTPAD"; break;
1173 case DT_MOVETAB
: name
= "MOVETAB"; break;
1174 case DT_SYMINFO
: name
= "SYMINFO"; break;
1175 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1176 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1177 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1178 case DT_VERSYM
: name
= "VERSYM"; break;
1179 case DT_VERDEF
: name
= "VERDEF"; break;
1180 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1181 case DT_VERNEED
: name
= "VERNEED"; break;
1182 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1183 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1184 case DT_USED
: name
= "USED"; break;
1185 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1188 fprintf (f
, " %-11s ", name
);
1190 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1194 unsigned int tagv
= dyn
.d_un
.d_val
;
1196 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1199 fprintf (f
, "%s", string
);
1208 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1209 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1211 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1215 if (elf_dynverdef (abfd
) != 0)
1217 Elf_Internal_Verdef
*t
;
1219 fprintf (f
, _("\nVersion definitions:\n"));
1220 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1222 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1223 t
->vd_flags
, t
->vd_hash
,
1224 t
->vd_nodename
? t
->vd_nodename
: "<corrupt>");
1225 if (t
->vd_auxptr
!= NULL
&& t
->vd_auxptr
->vda_nextptr
!= NULL
)
1227 Elf_Internal_Verdaux
*a
;
1230 for (a
= t
->vd_auxptr
->vda_nextptr
;
1234 a
->vda_nodename
? a
->vda_nodename
: "<corrupt>");
1240 if (elf_dynverref (abfd
) != 0)
1242 Elf_Internal_Verneed
*t
;
1244 fprintf (f
, _("\nVersion References:\n"));
1245 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1247 Elf_Internal_Vernaux
*a
;
1249 fprintf (f
, _(" required from %s:\n"),
1250 t
->vn_filename
? t
->vn_filename
: "<corrupt>");
1251 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1252 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1253 a
->vna_flags
, a
->vna_other
,
1254 a
->vna_nodename
? a
->vna_nodename
: "<corrupt>");
1266 /* Display ELF-specific fields of a symbol. */
1269 bfd_elf_print_symbol (bfd
*abfd
,
1272 bfd_print_symbol_type how
)
1277 case bfd_print_symbol_name
:
1278 fprintf (file
, "%s", symbol
->name
);
1280 case bfd_print_symbol_more
:
1281 fprintf (file
, "elf ");
1282 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1283 fprintf (file
, " %lx", (long) symbol
->flags
);
1285 case bfd_print_symbol_all
:
1287 const char *section_name
;
1288 const char *name
= NULL
;
1289 const struct elf_backend_data
*bed
;
1290 unsigned char st_other
;
1293 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1295 bed
= get_elf_backend_data (abfd
);
1296 if (bed
->elf_backend_print_symbol_all
)
1297 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1301 name
= symbol
->name
;
1302 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1305 fprintf (file
, " %s\t", section_name
);
1306 /* Print the "other" value for a symbol. For common symbols,
1307 we've already printed the size; now print the alignment.
1308 For other symbols, we have no specified alignment, and
1309 we've printed the address; now print the size. */
1310 if (bfd_is_com_section (symbol
->section
))
1311 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1313 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1314 bfd_fprintf_vma (abfd
, file
, val
);
1316 /* If we have version information, print it. */
1317 if (elf_tdata (abfd
)->dynversym_section
!= 0
1318 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1319 || elf_tdata (abfd
)->dynverref_section
!= 0))
1321 unsigned int vernum
;
1322 const char *version_string
;
1324 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1327 version_string
= "";
1328 else if (vernum
== 1)
1329 version_string
= "Base";
1330 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1332 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1335 Elf_Internal_Verneed
*t
;
1337 version_string
= "";
1338 for (t
= elf_tdata (abfd
)->verref
;
1342 Elf_Internal_Vernaux
*a
;
1344 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1346 if (a
->vna_other
== vernum
)
1348 version_string
= a
->vna_nodename
;
1355 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1356 fprintf (file
, " %-11s", version_string
);
1361 fprintf (file
, " (%s)", version_string
);
1362 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1367 /* If the st_other field is not zero, print it. */
1368 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1373 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1374 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1375 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1377 /* Some other non-defined flags are also present, so print
1379 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1382 fprintf (file
, " %s", name
);
1388 /* Create an entry in an ELF linker hash table. */
1390 struct bfd_hash_entry
*
1391 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1392 struct bfd_hash_table
*table
,
1395 /* Allocate the structure if it has not already been allocated by a
1399 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1404 /* Call the allocation method of the superclass. */
1405 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1408 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1409 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1411 /* Set local fields. */
1414 ret
->got
= htab
->init_got_refcount
;
1415 ret
->plt
= htab
->init_plt_refcount
;
1416 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1417 - offsetof (struct elf_link_hash_entry
, size
)));
1418 /* Assume that we have been called by a non-ELF symbol reader.
1419 This flag is then reset by the code which reads an ELF input
1420 file. This ensures that a symbol created by a non-ELF symbol
1421 reader will have the flag set correctly. */
1428 /* Copy data from an indirect symbol to its direct symbol, hiding the
1429 old indirect symbol. Also used for copying flags to a weakdef. */
1432 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1433 struct elf_link_hash_entry
*dir
,
1434 struct elf_link_hash_entry
*ind
)
1437 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1439 /* Copy down any references that we may have already seen to the
1440 symbol which just became indirect. */
1442 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1443 dir
->ref_regular
|= ind
->ref_regular
;
1444 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1445 dir
->non_got_ref
|= ind
->non_got_ref
;
1446 dir
->needs_plt
|= ind
->needs_plt
;
1447 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1449 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1452 /* Copy over the global and procedure linkage table refcount entries.
1453 These may have been already set up by a check_relocs routine. */
1454 tmp
= dir
->got
.refcount
;
1455 if (tmp
< lowest_valid
)
1457 dir
->got
.refcount
= ind
->got
.refcount
;
1458 ind
->got
.refcount
= tmp
;
1461 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1463 tmp
= dir
->plt
.refcount
;
1464 if (tmp
< lowest_valid
)
1466 dir
->plt
.refcount
= ind
->plt
.refcount
;
1467 ind
->plt
.refcount
= tmp
;
1470 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1472 if (dir
->dynindx
== -1)
1474 dir
->dynindx
= ind
->dynindx
;
1475 dir
->dynstr_index
= ind
->dynstr_index
;
1477 ind
->dynstr_index
= 0;
1480 BFD_ASSERT (ind
->dynindx
== -1);
1484 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1485 struct elf_link_hash_entry
*h
,
1486 bfd_boolean force_local
)
1488 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
1492 h
->forced_local
= 1;
1493 if (h
->dynindx
!= -1)
1496 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1502 /* Initialize an ELF linker hash table. */
1505 _bfd_elf_link_hash_table_init
1506 (struct elf_link_hash_table
*table
,
1508 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1509 struct bfd_hash_table
*,
1513 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1515 table
->dynamic_sections_created
= FALSE
;
1516 table
->dynobj
= NULL
;
1517 table
->init_got_refcount
.refcount
= can_refcount
- 1;
1518 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
1519 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
1520 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
1521 /* The first dynamic symbol is a dummy. */
1522 table
->dynsymcount
= 1;
1523 table
->dynstr
= NULL
;
1524 table
->bucketcount
= 0;
1525 table
->needed
= NULL
;
1527 table
->merge_info
= NULL
;
1528 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1529 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1530 table
->dynlocal
= NULL
;
1531 table
->runpath
= NULL
;
1532 table
->tls_sec
= NULL
;
1533 table
->tls_size
= 0;
1534 table
->loaded
= NULL
;
1535 table
->is_relocatable_executable
= FALSE
;
1537 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1538 table
->root
.type
= bfd_link_elf_hash_table
;
1543 /* Create an ELF linker hash table. */
1545 struct bfd_link_hash_table
*
1546 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1548 struct elf_link_hash_table
*ret
;
1549 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1551 ret
= bfd_malloc (amt
);
1555 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1564 /* This is a hook for the ELF emulation code in the generic linker to
1565 tell the backend linker what file name to use for the DT_NEEDED
1566 entry for a dynamic object. */
1569 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1571 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1572 && bfd_get_format (abfd
) == bfd_object
)
1573 elf_dt_name (abfd
) = name
;
1577 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1580 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1581 && bfd_get_format (abfd
) == bfd_object
)
1582 lib_class
= elf_dyn_lib_class (abfd
);
1589 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1591 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1592 && bfd_get_format (abfd
) == bfd_object
)
1593 elf_dyn_lib_class (abfd
) = lib_class
;
1596 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1597 the linker ELF emulation code. */
1599 struct bfd_link_needed_list
*
1600 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1601 struct bfd_link_info
*info
)
1603 if (! is_elf_hash_table (info
->hash
))
1605 return elf_hash_table (info
)->needed
;
1608 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1609 hook for the linker ELF emulation code. */
1611 struct bfd_link_needed_list
*
1612 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1613 struct bfd_link_info
*info
)
1615 if (! is_elf_hash_table (info
->hash
))
1617 return elf_hash_table (info
)->runpath
;
1620 /* Get the name actually used for a dynamic object for a link. This
1621 is the SONAME entry if there is one. Otherwise, it is the string
1622 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1625 bfd_elf_get_dt_soname (bfd
*abfd
)
1627 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1628 && bfd_get_format (abfd
) == bfd_object
)
1629 return elf_dt_name (abfd
);
1633 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1634 the ELF linker emulation code. */
1637 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1638 struct bfd_link_needed_list
**pneeded
)
1641 bfd_byte
*dynbuf
= NULL
;
1643 unsigned long shlink
;
1644 bfd_byte
*extdyn
, *extdynend
;
1646 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1650 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1651 || bfd_get_format (abfd
) != bfd_object
)
1654 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1655 if (s
== NULL
|| s
->size
== 0)
1658 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1661 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1665 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1667 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1668 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1671 extdynend
= extdyn
+ s
->size
;
1672 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1674 Elf_Internal_Dyn dyn
;
1676 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1678 if (dyn
.d_tag
== DT_NULL
)
1681 if (dyn
.d_tag
== DT_NEEDED
)
1684 struct bfd_link_needed_list
*l
;
1685 unsigned int tagv
= dyn
.d_un
.d_val
;
1688 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1693 l
= bfd_alloc (abfd
, amt
);
1714 /* Allocate an ELF string table--force the first byte to be zero. */
1716 struct bfd_strtab_hash
*
1717 _bfd_elf_stringtab_init (void)
1719 struct bfd_strtab_hash
*ret
;
1721 ret
= _bfd_stringtab_init ();
1726 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1727 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1728 if (loc
== (bfd_size_type
) -1)
1730 _bfd_stringtab_free (ret
);
1737 /* ELF .o/exec file reading */
1739 /* Create a new bfd section from an ELF section header. */
1742 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1744 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1745 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1746 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1749 name
= bfd_elf_string_from_elf_section (abfd
,
1750 elf_elfheader (abfd
)->e_shstrndx
,
1755 switch (hdr
->sh_type
)
1758 /* Inactive section. Throw it away. */
1761 case SHT_PROGBITS
: /* Normal section with contents. */
1762 case SHT_NOBITS
: /* .bss section. */
1763 case SHT_HASH
: /* .hash section. */
1764 case SHT_NOTE
: /* .note section. */
1765 case SHT_INIT_ARRAY
: /* .init_array section. */
1766 case SHT_FINI_ARRAY
: /* .fini_array section. */
1767 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1768 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1769 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1771 case SHT_DYNAMIC
: /* Dynamic linking information. */
1772 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1774 if (hdr
->sh_link
> elf_numsections (abfd
)
1775 || elf_elfsections (abfd
)[hdr
->sh_link
] == NULL
)
1777 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1779 Elf_Internal_Shdr
*dynsymhdr
;
1781 /* The shared libraries distributed with hpux11 have a bogus
1782 sh_link field for the ".dynamic" section. Find the
1783 string table for the ".dynsym" section instead. */
1784 if (elf_dynsymtab (abfd
) != 0)
1786 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1787 hdr
->sh_link
= dynsymhdr
->sh_link
;
1791 unsigned int i
, num_sec
;
1793 num_sec
= elf_numsections (abfd
);
1794 for (i
= 1; i
< num_sec
; i
++)
1796 dynsymhdr
= elf_elfsections (abfd
)[i
];
1797 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1799 hdr
->sh_link
= dynsymhdr
->sh_link
;
1807 case SHT_SYMTAB
: /* A symbol table */
1808 if (elf_onesymtab (abfd
) == shindex
)
1811 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1813 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1814 elf_onesymtab (abfd
) = shindex
;
1815 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1816 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1817 abfd
->flags
|= HAS_SYMS
;
1819 /* Sometimes a shared object will map in the symbol table. If
1820 SHF_ALLOC is set, and this is a shared object, then we also
1821 treat this section as a BFD section. We can not base the
1822 decision purely on SHF_ALLOC, because that flag is sometimes
1823 set in a relocatable object file, which would confuse the
1825 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1826 && (abfd
->flags
& DYNAMIC
) != 0
1827 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1831 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1832 can't read symbols without that section loaded as well. It
1833 is most likely specified by the next section header. */
1834 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1836 unsigned int i
, num_sec
;
1838 num_sec
= elf_numsections (abfd
);
1839 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1841 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1842 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1843 && hdr2
->sh_link
== shindex
)
1847 for (i
= 1; i
< shindex
; i
++)
1849 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1850 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1851 && hdr2
->sh_link
== shindex
)
1855 return bfd_section_from_shdr (abfd
, i
);
1859 case SHT_DYNSYM
: /* A dynamic symbol table */
1860 if (elf_dynsymtab (abfd
) == shindex
)
1863 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1865 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1866 elf_dynsymtab (abfd
) = shindex
;
1867 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1868 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1869 abfd
->flags
|= HAS_SYMS
;
1871 /* Besides being a symbol table, we also treat this as a regular
1872 section, so that objcopy can handle it. */
1873 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1875 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1876 if (elf_symtab_shndx (abfd
) == shindex
)
1879 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1880 elf_symtab_shndx (abfd
) = shindex
;
1881 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1882 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1885 case SHT_STRTAB
: /* A string table */
1886 if (hdr
->bfd_section
!= NULL
)
1888 if (ehdr
->e_shstrndx
== shindex
)
1890 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1891 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1894 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1897 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1898 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1901 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1904 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1905 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1906 elf_elfsections (abfd
)[shindex
] = hdr
;
1907 /* We also treat this as a regular section, so that objcopy
1909 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1913 /* If the string table isn't one of the above, then treat it as a
1914 regular section. We need to scan all the headers to be sure,
1915 just in case this strtab section appeared before the above. */
1916 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1918 unsigned int i
, num_sec
;
1920 num_sec
= elf_numsections (abfd
);
1921 for (i
= 1; i
< num_sec
; i
++)
1923 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1924 if (hdr2
->sh_link
== shindex
)
1926 /* Prevent endless recursion on broken objects. */
1929 if (! bfd_section_from_shdr (abfd
, i
))
1931 if (elf_onesymtab (abfd
) == i
)
1933 if (elf_dynsymtab (abfd
) == i
)
1934 goto dynsymtab_strtab
;
1938 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1942 /* *These* do a lot of work -- but build no sections! */
1944 asection
*target_sect
;
1945 Elf_Internal_Shdr
*hdr2
;
1946 unsigned int num_sec
= elf_numsections (abfd
);
1949 != (bfd_size_type
) (hdr
->sh_type
== SHT_REL
1950 ? bed
->s
->sizeof_rel
: bed
->s
->sizeof_rela
))
1953 /* Check for a bogus link to avoid crashing. */
1954 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1955 || hdr
->sh_link
>= num_sec
)
1957 ((*_bfd_error_handler
)
1958 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1959 abfd
, hdr
->sh_link
, name
, shindex
));
1960 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1964 /* For some incomprehensible reason Oracle distributes
1965 libraries for Solaris in which some of the objects have
1966 bogus sh_link fields. It would be nice if we could just
1967 reject them, but, unfortunately, some people need to use
1968 them. We scan through the section headers; if we find only
1969 one suitable symbol table, we clobber the sh_link to point
1970 to it. I hope this doesn't break anything. */
1971 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1972 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1978 for (scan
= 1; scan
< num_sec
; scan
++)
1980 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1981 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1992 hdr
->sh_link
= found
;
1995 /* Get the symbol table. */
1996 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1997 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1998 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
2001 /* If this reloc section does not use the main symbol table we
2002 don't treat it as a reloc section. BFD can't adequately
2003 represent such a section, so at least for now, we don't
2004 try. We just present it as a normal section. We also
2005 can't use it as a reloc section if it points to the null
2007 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
2008 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
2011 /* Prevent endless recursion on broken objects. */
2012 if (elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_REL
2013 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_RELA
)
2015 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
2017 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
2018 if (target_sect
== NULL
)
2021 if ((target_sect
->flags
& SEC_RELOC
) == 0
2022 || target_sect
->reloc_count
== 0)
2023 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
2027 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
2028 amt
= sizeof (*hdr2
);
2029 hdr2
= bfd_alloc (abfd
, amt
);
2030 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
2033 elf_elfsections (abfd
)[shindex
] = hdr2
;
2034 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
2035 target_sect
->flags
|= SEC_RELOC
;
2036 target_sect
->relocation
= NULL
;
2037 target_sect
->rel_filepos
= hdr
->sh_offset
;
2038 /* In the section to which the relocations apply, mark whether
2039 its relocations are of the REL or RELA variety. */
2040 if (hdr
->sh_size
!= 0)
2041 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2042 abfd
->flags
|= HAS_RELOC
;
2047 case SHT_GNU_verdef
:
2048 elf_dynverdef (abfd
) = shindex
;
2049 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2050 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2053 case SHT_GNU_versym
:
2054 if (hdr
->sh_entsize
!= sizeof (Elf_External_Versym
))
2056 elf_dynversym (abfd
) = shindex
;
2057 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2058 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2061 case SHT_GNU_verneed
:
2062 elf_dynverref (abfd
) = shindex
;
2063 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2064 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2071 /* We need a BFD section for objcopy and relocatable linking,
2072 and it's handy to have the signature available as the section
2074 if (hdr
->sh_entsize
!= GRP_ENTRY_SIZE
)
2076 name
= group_signature (abfd
, hdr
);
2079 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2081 if (hdr
->contents
!= NULL
)
2083 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2084 unsigned int n_elt
= hdr
->sh_size
/ 4;
2087 if (idx
->flags
& GRP_COMDAT
)
2088 hdr
->bfd_section
->flags
2089 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2091 /* We try to keep the same section order as it comes in. */
2093 while (--n_elt
!= 0)
2094 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2095 && elf_next_in_group (s
) != NULL
)
2097 elf_next_in_group (hdr
->bfd_section
) = s
;
2104 /* Check for any processor-specific section types. */
2105 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2112 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2113 Return SEC for sections that have no elf section, and NULL on error. */
2116 bfd_section_from_r_symndx (bfd
*abfd
,
2117 struct sym_sec_cache
*cache
,
2119 unsigned long r_symndx
)
2121 Elf_Internal_Shdr
*symtab_hdr
;
2122 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2123 Elf_External_Sym_Shndx eshndx
;
2124 Elf_Internal_Sym isym
;
2125 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2127 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2128 return cache
->sec
[ent
];
2130 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2131 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2132 &isym
, esym
, &eshndx
) == NULL
)
2135 if (cache
->abfd
!= abfd
)
2137 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2140 cache
->indx
[ent
] = r_symndx
;
2141 cache
->sec
[ent
] = sec
;
2142 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2143 || isym
.st_shndx
> SHN_HIRESERVE
)
2146 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2148 cache
->sec
[ent
] = s
;
2150 return cache
->sec
[ent
];
2153 /* Given an ELF section number, retrieve the corresponding BFD
2157 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2159 if (index
>= elf_numsections (abfd
))
2161 return elf_elfsections (abfd
)[index
]->bfd_section
;
2164 static const struct bfd_elf_special_section special_sections_b
[] =
2166 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2167 { NULL
, 0, 0, 0, 0 }
2170 static const struct bfd_elf_special_section special_sections_c
[] =
2172 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2173 { NULL
, 0, 0, 0, 0 }
2176 static const struct bfd_elf_special_section special_sections_d
[] =
2178 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2179 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2180 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2181 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2182 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2183 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2184 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2185 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2186 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2187 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2188 { NULL
, 0, 0, 0, 0 }
2191 static const struct bfd_elf_special_section special_sections_f
[] =
2193 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2194 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2195 { NULL
, 0, 0, 0, 0 }
2198 static const struct bfd_elf_special_section special_sections_g
[] =
2200 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2201 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2202 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2203 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2204 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2205 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2206 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2207 { NULL
, 0, 0, 0, 0 }
2210 static const struct bfd_elf_special_section special_sections_h
[] =
2212 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2213 { NULL
, 0, 0, 0, 0 }
2216 static const struct bfd_elf_special_section special_sections_i
[] =
2218 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2219 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2220 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2221 { NULL
, 0, 0, 0, 0 }
2224 static const struct bfd_elf_special_section special_sections_l
[] =
2226 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2227 { NULL
, 0, 0, 0, 0 }
2230 static const struct bfd_elf_special_section special_sections_n
[] =
2232 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2233 { ".note", 5, -1, SHT_NOTE
, 0 },
2234 { NULL
, 0, 0, 0, 0 }
2237 static const struct bfd_elf_special_section special_sections_p
[] =
2239 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2240 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2241 { NULL
, 0, 0, 0, 0 }
2244 static const struct bfd_elf_special_section special_sections_r
[] =
2246 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2247 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2248 { ".rela", 5, -1, SHT_RELA
, 0 },
2249 { ".rel", 4, -1, SHT_REL
, 0 },
2250 { NULL
, 0, 0, 0, 0 }
2253 static const struct bfd_elf_special_section special_sections_s
[] =
2255 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2256 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2257 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2258 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2259 { NULL
, 0, 0, 0, 0 }
2262 static const struct bfd_elf_special_section special_sections_t
[] =
2264 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2265 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2266 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2267 { NULL
, 0, 0, 0, 0 }
2270 static const struct bfd_elf_special_section
*special_sections
[] =
2272 special_sections_b
, /* 'b' */
2273 special_sections_c
, /* 'b' */
2274 special_sections_d
, /* 'd' */
2276 special_sections_f
, /* 'f' */
2277 special_sections_g
, /* 'g' */
2278 special_sections_h
, /* 'h' */
2279 special_sections_i
, /* 'i' */
2282 special_sections_l
, /* 'l' */
2284 special_sections_n
, /* 'n' */
2286 special_sections_p
, /* 'p' */
2288 special_sections_r
, /* 'r' */
2289 special_sections_s
, /* 's' */
2290 special_sections_t
, /* 't' */
2293 const struct bfd_elf_special_section
*
2294 _bfd_elf_get_special_section (const char *name
,
2295 const struct bfd_elf_special_section
*spec
,
2301 len
= strlen (name
);
2303 for (i
= 0; spec
[i
].prefix
!= NULL
; i
++)
2306 int prefix_len
= spec
[i
].prefix_length
;
2308 if (len
< prefix_len
)
2310 if (memcmp (name
, spec
[i
].prefix
, prefix_len
) != 0)
2313 suffix_len
= spec
[i
].suffix_length
;
2314 if (suffix_len
<= 0)
2316 if (name
[prefix_len
] != 0)
2318 if (suffix_len
== 0)
2320 if (name
[prefix_len
] != '.'
2321 && (suffix_len
== -2
2322 || (rela
&& spec
[i
].type
== SHT_REL
)))
2328 if (len
< prefix_len
+ suffix_len
)
2330 if (memcmp (name
+ len
- suffix_len
,
2331 spec
[i
].prefix
+ prefix_len
,
2341 const struct bfd_elf_special_section
*
2342 _bfd_elf_get_sec_type_attr (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*sec
)
2345 const struct bfd_elf_special_section
*spec
;
2347 /* See if this is one of the special sections. */
2348 if (sec
->name
== NULL
)
2351 if (sec
->name
[0] != '.')
2354 i
= sec
->name
[1] - 'b';
2355 if (i
< 0 || i
> 't' - 'b')
2358 spec
= special_sections
[i
];
2363 return _bfd_elf_get_special_section (sec
->name
, spec
, sec
->use_rela_p
);
2367 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2369 struct bfd_elf_section_data
*sdata
;
2370 const struct elf_backend_data
*bed
;
2371 const struct bfd_elf_special_section
*ssect
;
2373 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2376 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2379 sec
->used_by_bfd
= sdata
;
2382 /* Indicate whether or not this section should use RELA relocations. */
2383 bed
= get_elf_backend_data (abfd
);
2384 sec
->use_rela_p
= bed
->default_use_rela_p
;
2386 /* When we read a file, we don't need section type and flags unless
2387 it is a linker created section. They will be overridden in
2388 _bfd_elf_make_section_from_shdr anyway. */
2389 if (abfd
->direction
!= read_direction
2390 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2392 ssect
= (*bed
->get_sec_type_attr
) (abfd
, sec
);
2395 elf_section_type (sec
) = ssect
->type
;
2396 elf_section_flags (sec
) = ssect
->attr
;
2403 /* Create a new bfd section from an ELF program header.
2405 Since program segments have no names, we generate a synthetic name
2406 of the form segment<NUM>, where NUM is generally the index in the
2407 program header table. For segments that are split (see below) we
2408 generate the names segment<NUM>a and segment<NUM>b.
2410 Note that some program segments may have a file size that is different than
2411 (less than) the memory size. All this means is that at execution the
2412 system must allocate the amount of memory specified by the memory size,
2413 but only initialize it with the first "file size" bytes read from the
2414 file. This would occur for example, with program segments consisting
2415 of combined data+bss.
2417 To handle the above situation, this routine generates TWO bfd sections
2418 for the single program segment. The first has the length specified by
2419 the file size of the segment, and the second has the length specified
2420 by the difference between the two sizes. In effect, the segment is split
2421 into it's initialized and uninitialized parts.
2426 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2427 Elf_Internal_Phdr
*hdr
,
2429 const char *typename
)
2437 split
= ((hdr
->p_memsz
> 0)
2438 && (hdr
->p_filesz
> 0)
2439 && (hdr
->p_memsz
> hdr
->p_filesz
));
2440 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2441 len
= strlen (namebuf
) + 1;
2442 name
= bfd_alloc (abfd
, len
);
2445 memcpy (name
, namebuf
, len
);
2446 newsect
= bfd_make_section (abfd
, name
);
2447 if (newsect
== NULL
)
2449 newsect
->vma
= hdr
->p_vaddr
;
2450 newsect
->lma
= hdr
->p_paddr
;
2451 newsect
->size
= hdr
->p_filesz
;
2452 newsect
->filepos
= hdr
->p_offset
;
2453 newsect
->flags
|= SEC_HAS_CONTENTS
;
2454 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2455 if (hdr
->p_type
== PT_LOAD
)
2457 newsect
->flags
|= SEC_ALLOC
;
2458 newsect
->flags
|= SEC_LOAD
;
2459 if (hdr
->p_flags
& PF_X
)
2461 /* FIXME: all we known is that it has execute PERMISSION,
2463 newsect
->flags
|= SEC_CODE
;
2466 if (!(hdr
->p_flags
& PF_W
))
2468 newsect
->flags
|= SEC_READONLY
;
2473 sprintf (namebuf
, "%s%db", typename
, index
);
2474 len
= strlen (namebuf
) + 1;
2475 name
= bfd_alloc (abfd
, len
);
2478 memcpy (name
, namebuf
, len
);
2479 newsect
= bfd_make_section (abfd
, name
);
2480 if (newsect
== NULL
)
2482 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2483 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2484 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2485 if (hdr
->p_type
== PT_LOAD
)
2487 newsect
->flags
|= SEC_ALLOC
;
2488 if (hdr
->p_flags
& PF_X
)
2489 newsect
->flags
|= SEC_CODE
;
2491 if (!(hdr
->p_flags
& PF_W
))
2492 newsect
->flags
|= SEC_READONLY
;
2499 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2501 const struct elf_backend_data
*bed
;
2503 switch (hdr
->p_type
)
2506 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2509 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2512 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2515 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2518 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2520 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2525 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2528 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2530 case PT_GNU_EH_FRAME
:
2531 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2535 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2538 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2541 /* Check for any processor-specific program segment types. */
2542 bed
= get_elf_backend_data (abfd
);
2543 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2547 /* Initialize REL_HDR, the section-header for new section, containing
2548 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2549 relocations; otherwise, we use REL relocations. */
2552 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2553 Elf_Internal_Shdr
*rel_hdr
,
2555 bfd_boolean use_rela_p
)
2558 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2559 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2561 name
= bfd_alloc (abfd
, amt
);
2564 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2566 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2568 if (rel_hdr
->sh_name
== (unsigned int) -1)
2570 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2571 rel_hdr
->sh_entsize
= (use_rela_p
2572 ? bed
->s
->sizeof_rela
2573 : bed
->s
->sizeof_rel
);
2574 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2575 rel_hdr
->sh_flags
= 0;
2576 rel_hdr
->sh_addr
= 0;
2577 rel_hdr
->sh_size
= 0;
2578 rel_hdr
->sh_offset
= 0;
2583 /* Set up an ELF internal section header for a section. */
2586 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2588 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2589 bfd_boolean
*failedptr
= failedptrarg
;
2590 Elf_Internal_Shdr
*this_hdr
;
2594 /* We already failed; just get out of the bfd_map_over_sections
2599 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2601 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2602 asect
->name
, FALSE
);
2603 if (this_hdr
->sh_name
== (unsigned int) -1)
2609 this_hdr
->sh_flags
= 0;
2611 if ((asect
->flags
& SEC_ALLOC
) != 0
2612 || asect
->user_set_vma
)
2613 this_hdr
->sh_addr
= asect
->vma
;
2615 this_hdr
->sh_addr
= 0;
2617 this_hdr
->sh_offset
= 0;
2618 this_hdr
->sh_size
= asect
->size
;
2619 this_hdr
->sh_link
= 0;
2620 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2621 /* The sh_entsize and sh_info fields may have been set already by
2622 copy_private_section_data. */
2624 this_hdr
->bfd_section
= asect
;
2625 this_hdr
->contents
= NULL
;
2627 /* If the section type is unspecified, we set it based on
2629 if (this_hdr
->sh_type
== SHT_NULL
)
2631 if ((asect
->flags
& SEC_GROUP
) != 0)
2633 /* We also need to mark SHF_GROUP here for relocatable
2635 struct bfd_link_order
*l
;
2638 for (l
= asect
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2639 if (l
->type
== bfd_indirect_link_order
2640 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2643 /* The name is not important. Anything will do. */
2644 elf_group_name (elt
->output_section
) = "G";
2645 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2647 elt
= elf_next_in_group (elt
);
2648 /* During a relocatable link, the lists are
2651 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2653 this_hdr
->sh_type
= SHT_GROUP
;
2655 else if ((asect
->flags
& SEC_ALLOC
) != 0
2656 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2657 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2658 this_hdr
->sh_type
= SHT_NOBITS
;
2660 this_hdr
->sh_type
= SHT_PROGBITS
;
2663 switch (this_hdr
->sh_type
)
2669 case SHT_INIT_ARRAY
:
2670 case SHT_FINI_ARRAY
:
2671 case SHT_PREINIT_ARRAY
:
2678 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2682 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2686 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2690 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2691 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2695 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2696 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2699 case SHT_GNU_versym
:
2700 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2703 case SHT_GNU_verdef
:
2704 this_hdr
->sh_entsize
= 0;
2705 /* objcopy or strip will copy over sh_info, but may not set
2706 cverdefs. The linker will set cverdefs, but sh_info will be
2708 if (this_hdr
->sh_info
== 0)
2709 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2711 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2712 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2715 case SHT_GNU_verneed
:
2716 this_hdr
->sh_entsize
= 0;
2717 /* objcopy or strip will copy over sh_info, but may not set
2718 cverrefs. The linker will set cverrefs, but sh_info will be
2720 if (this_hdr
->sh_info
== 0)
2721 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2723 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2724 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2728 this_hdr
->sh_entsize
= 4;
2732 if ((asect
->flags
& SEC_ALLOC
) != 0)
2733 this_hdr
->sh_flags
|= SHF_ALLOC
;
2734 if ((asect
->flags
& SEC_READONLY
) == 0)
2735 this_hdr
->sh_flags
|= SHF_WRITE
;
2736 if ((asect
->flags
& SEC_CODE
) != 0)
2737 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2738 if ((asect
->flags
& SEC_MERGE
) != 0)
2740 this_hdr
->sh_flags
|= SHF_MERGE
;
2741 this_hdr
->sh_entsize
= asect
->entsize
;
2742 if ((asect
->flags
& SEC_STRINGS
) != 0)
2743 this_hdr
->sh_flags
|= SHF_STRINGS
;
2745 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2746 this_hdr
->sh_flags
|= SHF_GROUP
;
2747 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2749 this_hdr
->sh_flags
|= SHF_TLS
;
2750 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2752 struct bfd_link_order
*o
;
2754 this_hdr
->sh_size
= 0;
2755 for (o
= asect
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
2756 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2757 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2758 if (this_hdr
->sh_size
)
2759 this_hdr
->sh_type
= SHT_NOBITS
;
2763 /* Check for processor-specific section types. */
2764 if (bed
->elf_backend_fake_sections
2765 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2768 /* If the section has relocs, set up a section header for the
2769 SHT_REL[A] section. If two relocation sections are required for
2770 this section, it is up to the processor-specific back-end to
2771 create the other. */
2772 if ((asect
->flags
& SEC_RELOC
) != 0
2773 && !_bfd_elf_init_reloc_shdr (abfd
,
2774 &elf_section_data (asect
)->rel_hdr
,
2780 /* Fill in the contents of a SHT_GROUP section. */
2783 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2785 bfd_boolean
*failedptr
= failedptrarg
;
2786 unsigned long symindx
;
2787 asection
*elt
, *first
;
2789 struct bfd_link_order
*l
;
2792 /* Ignore linker created group section. See elfNN_ia64_object_p in
2794 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2799 if (elf_group_id (sec
) != NULL
)
2800 symindx
= elf_group_id (sec
)->udata
.i
;
2804 /* If called from the assembler, swap_out_syms will have set up
2805 elf_section_syms; If called for "ld -r", use target_index. */
2806 if (elf_section_syms (abfd
) != NULL
)
2807 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2809 symindx
= sec
->target_index
;
2811 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2813 /* The contents won't be allocated for "ld -r" or objcopy. */
2815 if (sec
->contents
== NULL
)
2818 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2820 /* Arrange for the section to be written out. */
2821 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2822 if (sec
->contents
== NULL
)
2829 loc
= sec
->contents
+ sec
->size
;
2831 /* Get the pointer to the first section in the group that gas
2832 squirreled away here. objcopy arranges for this to be set to the
2833 start of the input section group. */
2834 first
= elt
= elf_next_in_group (sec
);
2836 /* First element is a flag word. Rest of section is elf section
2837 indices for all the sections of the group. Write them backwards
2838 just to keep the group in the same order as given in .section
2839 directives, not that it matters. */
2848 s
= s
->output_section
;
2851 idx
= elf_section_data (s
)->this_idx
;
2852 H_PUT_32 (abfd
, idx
, loc
);
2853 elt
= elf_next_in_group (elt
);
2858 /* If this is a relocatable link, then the above did nothing because
2859 SEC is the output section. Look through the input sections
2861 for (l
= sec
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2862 if (l
->type
== bfd_indirect_link_order
2863 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2868 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2869 elt
= elf_next_in_group (elt
);
2870 /* During a relocatable link, the lists are circular. */
2872 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2874 if ((loc
-= 4) != sec
->contents
)
2877 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2880 /* Assign all ELF section numbers. The dummy first section is handled here
2881 too. The link/info pointers for the standard section types are filled
2882 in here too, while we're at it. */
2885 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2887 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2889 unsigned int section_number
, secn
;
2890 Elf_Internal_Shdr
**i_shdrp
;
2891 struct bfd_elf_section_data
*d
;
2895 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2897 /* SHT_GROUP sections are in relocatable files only. */
2898 if (link_info
== NULL
|| link_info
->relocatable
)
2900 /* Put SHT_GROUP sections first. */
2901 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2903 d
= elf_section_data (sec
);
2905 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2907 if (sec
->flags
& SEC_LINKER_CREATED
)
2909 /* Remove the linker created SHT_GROUP sections. */
2910 bfd_section_list_remove (abfd
, sec
);
2911 abfd
->section_count
--;
2915 if (section_number
== SHN_LORESERVE
)
2916 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2917 d
->this_idx
= section_number
++;
2923 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2925 d
= elf_section_data (sec
);
2927 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2929 if (section_number
== SHN_LORESERVE
)
2930 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2931 d
->this_idx
= section_number
++;
2933 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2934 if ((sec
->flags
& SEC_RELOC
) == 0)
2938 if (section_number
== SHN_LORESERVE
)
2939 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2940 d
->rel_idx
= section_number
++;
2941 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2946 if (section_number
== SHN_LORESERVE
)
2947 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2948 d
->rel_idx2
= section_number
++;
2949 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2955 if (section_number
== SHN_LORESERVE
)
2956 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2957 t
->shstrtab_section
= section_number
++;
2958 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2959 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2961 if (bfd_get_symcount (abfd
) > 0)
2963 if (section_number
== SHN_LORESERVE
)
2964 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2965 t
->symtab_section
= section_number
++;
2966 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2967 if (section_number
> SHN_LORESERVE
- 2)
2969 if (section_number
== SHN_LORESERVE
)
2970 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2971 t
->symtab_shndx_section
= section_number
++;
2972 t
->symtab_shndx_hdr
.sh_name
2973 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2974 ".symtab_shndx", FALSE
);
2975 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2978 if (section_number
== SHN_LORESERVE
)
2979 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2980 t
->strtab_section
= section_number
++;
2981 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2984 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2985 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2987 elf_numsections (abfd
) = section_number
;
2988 elf_elfheader (abfd
)->e_shnum
= section_number
;
2989 if (section_number
> SHN_LORESERVE
)
2990 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2992 /* Set up the list of section header pointers, in agreement with the
2994 i_shdrp
= bfd_zalloc2 (abfd
, section_number
, sizeof (Elf_Internal_Shdr
*));
2995 if (i_shdrp
== NULL
)
2998 i_shdrp
[0] = bfd_zalloc (abfd
, sizeof (Elf_Internal_Shdr
));
2999 if (i_shdrp
[0] == NULL
)
3001 bfd_release (abfd
, i_shdrp
);
3005 elf_elfsections (abfd
) = i_shdrp
;
3007 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
3008 if (bfd_get_symcount (abfd
) > 0)
3010 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
3011 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3013 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
3014 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
3016 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
3017 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
3020 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
3022 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3026 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3027 if (d
->rel_idx
!= 0)
3028 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3029 if (d
->rel_idx2
!= 0)
3030 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3032 /* Fill in the sh_link and sh_info fields while we're at it. */
3034 /* sh_link of a reloc section is the section index of the symbol
3035 table. sh_info is the section index of the section to which
3036 the relocation entries apply. */
3037 if (d
->rel_idx
!= 0)
3039 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3040 d
->rel_hdr
.sh_info
= d
->this_idx
;
3042 if (d
->rel_idx2
!= 0)
3044 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3045 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3048 /* We need to set up sh_link for SHF_LINK_ORDER. */
3049 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3051 s
= elf_linked_to_section (sec
);
3053 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3056 struct bfd_link_order
*p
;
3058 /* Find out what the corresponding section in output
3060 for (p
= sec
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
3062 s
= p
->u
.indirect
.section
;
3063 if (p
->type
== bfd_indirect_link_order
3064 && (bfd_get_flavour (s
->owner
)
3065 == bfd_target_elf_flavour
))
3067 Elf_Internal_Shdr
** const elf_shdrp
3068 = elf_elfsections (s
->owner
);
3070 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
3071 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
3073 The Intel C compiler generates SHT_IA_64_UNWIND with
3074 SHF_LINK_ORDER. But it doesn't set the sh_link or
3075 sh_info fields. Hence we could get the situation
3076 where elfsec is 0. */
3079 const struct elf_backend_data
*bed
3080 = get_elf_backend_data (abfd
);
3081 if (bed
->link_order_error_handler
)
3082 bed
->link_order_error_handler
3083 (_("%B: warning: sh_link not set for section `%A'"),
3088 s
= elf_shdrp
[elfsec
]->bfd_section
;
3089 if (elf_discarded_section (s
))
3092 (*_bfd_error_handler
)
3093 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3094 abfd
, d
->this_hdr
.bfd_section
,
3096 /* Point to the kept section if it has
3097 the same size as the discarded
3099 kept
= _bfd_elf_check_kept_section (s
);
3102 bfd_set_error (bfd_error_bad_value
);
3107 s
= s
->output_section
;
3108 BFD_ASSERT (s
!= NULL
);
3109 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3117 switch (d
->this_hdr
.sh_type
)
3121 /* A reloc section which we are treating as a normal BFD
3122 section. sh_link is the section index of the symbol
3123 table. sh_info is the section index of the section to
3124 which the relocation entries apply. We assume that an
3125 allocated reloc section uses the dynamic symbol table.
3126 FIXME: How can we be sure? */
3127 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3129 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3131 /* We look up the section the relocs apply to by name. */
3133 if (d
->this_hdr
.sh_type
== SHT_REL
)
3137 s
= bfd_get_section_by_name (abfd
, name
);
3139 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3143 /* We assume that a section named .stab*str is a stabs
3144 string section. We look for a section with the same name
3145 but without the trailing ``str'', and set its sh_link
3146 field to point to this section. */
3147 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3148 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3153 len
= strlen (sec
->name
);
3154 alc
= bfd_malloc (len
- 2);
3157 memcpy (alc
, sec
->name
, len
- 3);
3158 alc
[len
- 3] = '\0';
3159 s
= bfd_get_section_by_name (abfd
, alc
);
3163 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3165 /* This is a .stab section. */
3166 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3167 elf_section_data (s
)->this_hdr
.sh_entsize
3168 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3175 case SHT_GNU_verneed
:
3176 case SHT_GNU_verdef
:
3177 /* sh_link is the section header index of the string table
3178 used for the dynamic entries, or the symbol table, or the
3180 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3182 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3185 case SHT_GNU_LIBLIST
:
3186 /* sh_link is the section header index of the prelink library
3188 used for the dynamic entries, or the symbol table, or the
3190 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3191 ? ".dynstr" : ".gnu.libstr");
3193 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3197 case SHT_GNU_versym
:
3198 /* sh_link is the section header index of the symbol table
3199 this hash table or version table is for. */
3200 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3202 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3206 d
->this_hdr
.sh_link
= t
->symtab_section
;
3210 for (secn
= 1; secn
< section_number
; ++secn
)
3211 if (i_shdrp
[secn
] == NULL
)
3212 i_shdrp
[secn
] = i_shdrp
[0];
3214 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3215 i_shdrp
[secn
]->sh_name
);
3219 /* Map symbol from it's internal number to the external number, moving
3220 all local symbols to be at the head of the list. */
3223 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3225 /* If the backend has a special mapping, use it. */
3226 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3227 if (bed
->elf_backend_sym_is_global
)
3228 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3230 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3231 || bfd_is_und_section (bfd_get_section (sym
))
3232 || bfd_is_com_section (bfd_get_section (sym
)));
3236 elf_map_symbols (bfd
*abfd
)
3238 unsigned int symcount
= bfd_get_symcount (abfd
);
3239 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3240 asymbol
**sect_syms
;
3241 unsigned int num_locals
= 0;
3242 unsigned int num_globals
= 0;
3243 unsigned int num_locals2
= 0;
3244 unsigned int num_globals2
= 0;
3251 fprintf (stderr
, "elf_map_symbols\n");
3255 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3257 if (max_index
< asect
->index
)
3258 max_index
= asect
->index
;
3262 sect_syms
= bfd_zalloc2 (abfd
, max_index
, sizeof (asymbol
*));
3263 if (sect_syms
== NULL
)
3265 elf_section_syms (abfd
) = sect_syms
;
3266 elf_num_section_syms (abfd
) = max_index
;
3268 /* Init sect_syms entries for any section symbols we have already
3269 decided to output. */
3270 for (idx
= 0; idx
< symcount
; idx
++)
3272 asymbol
*sym
= syms
[idx
];
3274 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3281 if (sec
->owner
!= NULL
)
3283 if (sec
->owner
!= abfd
)
3285 if (sec
->output_offset
!= 0)
3288 sec
= sec
->output_section
;
3290 /* Empty sections in the input files may have had a
3291 section symbol created for them. (See the comment
3292 near the end of _bfd_generic_link_output_symbols in
3293 linker.c). If the linker script discards such
3294 sections then we will reach this point. Since we know
3295 that we cannot avoid this case, we detect it and skip
3296 the abort and the assignment to the sect_syms array.
3297 To reproduce this particular case try running the
3298 linker testsuite test ld-scripts/weak.exp for an ELF
3299 port that uses the generic linker. */
3300 if (sec
->owner
== NULL
)
3303 BFD_ASSERT (sec
->owner
== abfd
);
3305 sect_syms
[sec
->index
] = syms
[idx
];
3310 /* Classify all of the symbols. */
3311 for (idx
= 0; idx
< symcount
; idx
++)
3313 if (!sym_is_global (abfd
, syms
[idx
]))
3319 /* We will be adding a section symbol for each BFD section. Most normal
3320 sections will already have a section symbol in outsymbols, but
3321 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3322 at least in that case. */
3323 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3325 if (sect_syms
[asect
->index
] == NULL
)
3327 if (!sym_is_global (abfd
, asect
->symbol
))
3334 /* Now sort the symbols so the local symbols are first. */
3335 new_syms
= bfd_alloc2 (abfd
, num_locals
+ num_globals
, sizeof (asymbol
*));
3337 if (new_syms
== NULL
)
3340 for (idx
= 0; idx
< symcount
; idx
++)
3342 asymbol
*sym
= syms
[idx
];
3345 if (!sym_is_global (abfd
, sym
))
3348 i
= num_locals
+ num_globals2
++;
3350 sym
->udata
.i
= i
+ 1;
3352 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3354 if (sect_syms
[asect
->index
] == NULL
)
3356 asymbol
*sym
= asect
->symbol
;
3359 sect_syms
[asect
->index
] = sym
;
3360 if (!sym_is_global (abfd
, sym
))
3363 i
= num_locals
+ num_globals2
++;
3365 sym
->udata
.i
= i
+ 1;
3369 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3371 elf_num_locals (abfd
) = num_locals
;
3372 elf_num_globals (abfd
) = num_globals
;
3376 /* Align to the maximum file alignment that could be required for any
3377 ELF data structure. */
3379 static inline file_ptr
3380 align_file_position (file_ptr off
, int align
)
3382 return (off
+ align
- 1) & ~(align
- 1);
3385 /* Assign a file position to a section, optionally aligning to the
3386 required section alignment. */
3389 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3397 al
= i_shdrp
->sh_addralign
;
3399 offset
= BFD_ALIGN (offset
, al
);
3401 i_shdrp
->sh_offset
= offset
;
3402 if (i_shdrp
->bfd_section
!= NULL
)
3403 i_shdrp
->bfd_section
->filepos
= offset
;
3404 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3405 offset
+= i_shdrp
->sh_size
;
3409 /* Compute the file positions we are going to put the sections at, and
3410 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3411 is not NULL, this is being called by the ELF backend linker. */
3414 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3415 struct bfd_link_info
*link_info
)
3417 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3419 struct bfd_strtab_hash
*strtab
= NULL
;
3420 Elf_Internal_Shdr
*shstrtab_hdr
;
3422 if (abfd
->output_has_begun
)
3425 /* Do any elf backend specific processing first. */
3426 if (bed
->elf_backend_begin_write_processing
)
3427 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3429 if (! prep_headers (abfd
))
3432 /* Post process the headers if necessary. */
3433 if (bed
->elf_backend_post_process_headers
)
3434 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3437 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3441 if (!assign_section_numbers (abfd
, link_info
))
3444 /* The backend linker builds symbol table information itself. */
3445 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3447 /* Non-zero if doing a relocatable link. */
3448 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3450 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3454 if (link_info
== NULL
)
3456 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3461 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3462 /* sh_name was set in prep_headers. */
3463 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3464 shstrtab_hdr
->sh_flags
= 0;
3465 shstrtab_hdr
->sh_addr
= 0;
3466 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3467 shstrtab_hdr
->sh_entsize
= 0;
3468 shstrtab_hdr
->sh_link
= 0;
3469 shstrtab_hdr
->sh_info
= 0;
3470 /* sh_offset is set in assign_file_positions_except_relocs. */
3471 shstrtab_hdr
->sh_addralign
= 1;
3473 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3476 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3479 Elf_Internal_Shdr
*hdr
;
3481 off
= elf_tdata (abfd
)->next_file_pos
;
3483 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3484 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3486 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3487 if (hdr
->sh_size
!= 0)
3488 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3490 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3491 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3493 elf_tdata (abfd
)->next_file_pos
= off
;
3495 /* Now that we know where the .strtab section goes, write it
3497 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3498 || ! _bfd_stringtab_emit (abfd
, strtab
))
3500 _bfd_stringtab_free (strtab
);
3503 abfd
->output_has_begun
= TRUE
;
3508 /* Create a mapping from a set of sections to a program segment. */
3510 static struct elf_segment_map
*
3511 make_mapping (bfd
*abfd
,
3512 asection
**sections
,
3517 struct elf_segment_map
*m
;
3522 amt
= sizeof (struct elf_segment_map
);
3523 amt
+= (to
- from
- 1) * sizeof (asection
*);
3524 m
= bfd_zalloc (abfd
, amt
);
3528 m
->p_type
= PT_LOAD
;
3529 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3530 m
->sections
[i
- from
] = *hdrpp
;
3531 m
->count
= to
- from
;
3533 if (from
== 0 && phdr
)
3535 /* Include the headers in the first PT_LOAD segment. */
3536 m
->includes_filehdr
= 1;
3537 m
->includes_phdrs
= 1;
3543 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3546 struct elf_segment_map
*
3547 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3549 struct elf_segment_map
*m
;
3551 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3555 m
->p_type
= PT_DYNAMIC
;
3557 m
->sections
[0] = dynsec
;
3562 /* Set up a mapping from BFD sections to program segments. */
3565 map_sections_to_segments (bfd
*abfd
)
3567 asection
**sections
= NULL
;
3571 struct elf_segment_map
*mfirst
;
3572 struct elf_segment_map
**pm
;
3573 struct elf_segment_map
*m
;
3576 unsigned int phdr_index
;
3577 bfd_vma maxpagesize
;
3579 bfd_boolean phdr_in_segment
= TRUE
;
3580 bfd_boolean writable
;
3582 asection
*first_tls
= NULL
;
3583 asection
*dynsec
, *eh_frame_hdr
;
3586 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3589 if (bfd_count_sections (abfd
) == 0)
3592 /* Select the allocated sections, and sort them. */
3594 sections
= bfd_malloc2 (bfd_count_sections (abfd
), sizeof (asection
*));
3595 if (sections
== NULL
)
3599 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3601 if ((s
->flags
& SEC_ALLOC
) != 0)
3607 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3610 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3612 /* Build the mapping. */
3617 /* If we have a .interp section, then create a PT_PHDR segment for
3618 the program headers and a PT_INTERP segment for the .interp
3620 s
= bfd_get_section_by_name (abfd
, ".interp");
3621 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3623 amt
= sizeof (struct elf_segment_map
);
3624 m
= bfd_zalloc (abfd
, amt
);
3628 m
->p_type
= PT_PHDR
;
3629 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3630 m
->p_flags
= PF_R
| PF_X
;
3631 m
->p_flags_valid
= 1;
3632 m
->includes_phdrs
= 1;
3637 amt
= sizeof (struct elf_segment_map
);
3638 m
= bfd_zalloc (abfd
, amt
);
3642 m
->p_type
= PT_INTERP
;
3650 /* Look through the sections. We put sections in the same program
3651 segment when the start of the second section can be placed within
3652 a few bytes of the end of the first section. */
3656 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3658 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3660 && (dynsec
->flags
& SEC_LOAD
) == 0)
3663 /* Deal with -Ttext or something similar such that the first section
3664 is not adjacent to the program headers. This is an
3665 approximation, since at this point we don't know exactly how many
3666 program headers we will need. */
3669 bfd_size_type phdr_size
;
3671 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3673 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3674 if ((abfd
->flags
& D_PAGED
) == 0
3675 || sections
[0]->lma
< phdr_size
3676 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3677 phdr_in_segment
= FALSE
;
3680 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3683 bfd_boolean new_segment
;
3687 /* See if this section and the last one will fit in the same
3690 if (last_hdr
== NULL
)
3692 /* If we don't have a segment yet, then we don't need a new
3693 one (we build the last one after this loop). */
3694 new_segment
= FALSE
;
3696 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3698 /* If this section has a different relation between the
3699 virtual address and the load address, then we need a new
3703 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3704 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3706 /* If putting this section in this segment would force us to
3707 skip a page in the segment, then we need a new segment. */
3710 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3711 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3713 /* We don't want to put a loadable section after a
3714 nonloadable section in the same segment.
3715 Consider .tbss sections as loadable for this purpose. */
3718 else if ((abfd
->flags
& D_PAGED
) == 0)
3720 /* If the file is not demand paged, which means that we
3721 don't require the sections to be correctly aligned in the
3722 file, then there is no other reason for a new segment. */
3723 new_segment
= FALSE
;
3726 && (hdr
->flags
& SEC_READONLY
) == 0
3727 && (((last_hdr
->lma
+ last_size
- 1)
3728 & ~(maxpagesize
- 1))
3729 != (hdr
->lma
& ~(maxpagesize
- 1))))
3731 /* We don't want to put a writable section in a read only
3732 segment, unless they are on the same page in memory
3733 anyhow. We already know that the last section does not
3734 bring us past the current section on the page, so the
3735 only case in which the new section is not on the same
3736 page as the previous section is when the previous section
3737 ends precisely on a page boundary. */
3742 /* Otherwise, we can use the same segment. */
3743 new_segment
= FALSE
;
3748 if ((hdr
->flags
& SEC_READONLY
) == 0)
3751 /* .tbss sections effectively have zero size. */
3752 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3753 last_size
= hdr
->size
;
3759 /* We need a new program segment. We must create a new program
3760 header holding all the sections from phdr_index until hdr. */
3762 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3769 if ((hdr
->flags
& SEC_READONLY
) == 0)
3775 /* .tbss sections effectively have zero size. */
3776 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3777 last_size
= hdr
->size
;
3781 phdr_in_segment
= FALSE
;
3784 /* Create a final PT_LOAD program segment. */
3785 if (last_hdr
!= NULL
)
3787 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3795 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3798 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3805 /* For each loadable .note section, add a PT_NOTE segment. We don't
3806 use bfd_get_section_by_name, because if we link together
3807 nonloadable .note sections and loadable .note sections, we will
3808 generate two .note sections in the output file. FIXME: Using
3809 names for section types is bogus anyhow. */
3810 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3812 if ((s
->flags
& SEC_LOAD
) != 0
3813 && strncmp (s
->name
, ".note", 5) == 0)
3815 amt
= sizeof (struct elf_segment_map
);
3816 m
= bfd_zalloc (abfd
, amt
);
3820 m
->p_type
= PT_NOTE
;
3827 if (s
->flags
& SEC_THREAD_LOCAL
)
3835 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3840 amt
= sizeof (struct elf_segment_map
);
3841 amt
+= (tls_count
- 1) * sizeof (asection
*);
3842 m
= bfd_zalloc (abfd
, amt
);
3847 m
->count
= tls_count
;
3848 /* Mandated PF_R. */
3850 m
->p_flags_valid
= 1;
3851 for (i
= 0; i
< tls_count
; ++i
)
3853 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3854 m
->sections
[i
] = first_tls
;
3855 first_tls
= first_tls
->next
;
3862 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3864 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3865 if (eh_frame_hdr
!= NULL
3866 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3868 amt
= sizeof (struct elf_segment_map
);
3869 m
= bfd_zalloc (abfd
, amt
);
3873 m
->p_type
= PT_GNU_EH_FRAME
;
3875 m
->sections
[0] = eh_frame_hdr
->output_section
;
3881 if (elf_tdata (abfd
)->stack_flags
)
3883 amt
= sizeof (struct elf_segment_map
);
3884 m
= bfd_zalloc (abfd
, amt
);
3888 m
->p_type
= PT_GNU_STACK
;
3889 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3890 m
->p_flags_valid
= 1;
3896 if (elf_tdata (abfd
)->relro
)
3898 amt
= sizeof (struct elf_segment_map
);
3899 m
= bfd_zalloc (abfd
, amt
);
3903 m
->p_type
= PT_GNU_RELRO
;
3905 m
->p_flags_valid
= 1;
3914 elf_tdata (abfd
)->segment_map
= mfirst
;
3918 if (sections
!= NULL
)
3923 /* Sort sections by address. */
3926 elf_sort_sections (const void *arg1
, const void *arg2
)
3928 const asection
*sec1
= *(const asection
**) arg1
;
3929 const asection
*sec2
= *(const asection
**) arg2
;
3930 bfd_size_type size1
, size2
;
3932 /* Sort by LMA first, since this is the address used to
3933 place the section into a segment. */
3934 if (sec1
->lma
< sec2
->lma
)
3936 else if (sec1
->lma
> sec2
->lma
)
3939 /* Then sort by VMA. Normally the LMA and the VMA will be
3940 the same, and this will do nothing. */
3941 if (sec1
->vma
< sec2
->vma
)
3943 else if (sec1
->vma
> sec2
->vma
)
3946 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3948 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3954 /* If the indicies are the same, do not return 0
3955 here, but continue to try the next comparison. */
3956 if (sec1
->target_index
- sec2
->target_index
!= 0)
3957 return sec1
->target_index
- sec2
->target_index
;
3962 else if (TOEND (sec2
))
3967 /* Sort by size, to put zero sized sections
3968 before others at the same address. */
3970 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3971 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3978 return sec1
->target_index
- sec2
->target_index
;
3981 /* Ian Lance Taylor writes:
3983 We shouldn't be using % with a negative signed number. That's just
3984 not good. We have to make sure either that the number is not
3985 negative, or that the number has an unsigned type. When the types
3986 are all the same size they wind up as unsigned. When file_ptr is a
3987 larger signed type, the arithmetic winds up as signed long long,
3990 What we're trying to say here is something like ``increase OFF by
3991 the least amount that will cause it to be equal to the VMA modulo
3993 /* In other words, something like:
3995 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3996 off_offset = off % bed->maxpagesize;
3997 if (vma_offset < off_offset)
3998 adjustment = vma_offset + bed->maxpagesize - off_offset;
4000 adjustment = vma_offset - off_offset;
4002 which can can be collapsed into the expression below. */
4005 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
4007 return ((vma
- off
) % maxpagesize
);
4010 /* Assign file positions to the sections based on the mapping from
4011 sections to segments. This function also sets up some fields in
4012 the file header, and writes out the program headers. */
4015 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
4017 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4019 struct elf_segment_map
*m
;
4021 Elf_Internal_Phdr
*phdrs
;
4023 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4024 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4025 Elf_Internal_Phdr
*p
;
4027 if (elf_tdata (abfd
)->segment_map
== NULL
)
4029 if (! map_sections_to_segments (abfd
))
4034 /* The placement algorithm assumes that non allocated sections are
4035 not in PT_LOAD segments. We ensure this here by removing such
4036 sections from the segment map. We also remove excluded
4038 for (m
= elf_tdata (abfd
)->segment_map
;
4042 unsigned int new_count
;
4046 for (i
= 0; i
< m
->count
; i
++)
4048 if ((m
->sections
[i
]->flags
& SEC_EXCLUDE
) == 0
4049 && ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0
4050 || m
->p_type
!= PT_LOAD
))
4053 m
->sections
[new_count
] = m
->sections
[i
];
4059 if (new_count
!= m
->count
)
4060 m
->count
= new_count
;
4064 if (bed
->elf_backend_modify_segment_map
)
4066 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4071 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4074 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4075 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4076 elf_elfheader (abfd
)->e_phnum
= count
;
4080 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4084 /* If we already counted the number of program segments, make sure
4085 that we allocated enough space. This happens when SIZEOF_HEADERS
4086 is used in a linker script. */
4087 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4088 if (alloc
!= 0 && count
> alloc
)
4090 ((*_bfd_error_handler
)
4091 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4092 abfd
, alloc
, count
));
4093 bfd_set_error (bfd_error_bad_value
);
4100 phdrs
= bfd_alloc2 (abfd
, alloc
, sizeof (Elf_Internal_Phdr
));
4104 off
= bed
->s
->sizeof_ehdr
;
4105 off
+= alloc
* bed
->s
->sizeof_phdr
;
4112 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4119 /* If elf_segment_map is not from map_sections_to_segments, the
4120 sections may not be correctly ordered. NOTE: sorting should
4121 not be done to the PT_NOTE section of a corefile, which may
4122 contain several pseudo-sections artificially created by bfd.
4123 Sorting these pseudo-sections breaks things badly. */
4125 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4126 && m
->p_type
== PT_NOTE
))
4127 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4130 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4131 number of sections with contents contributing to both p_filesz
4132 and p_memsz, followed by a number of sections with no contents
4133 that just contribute to p_memsz. In this loop, OFF tracks next
4134 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4135 an adjustment we use for segments that have no file contents
4136 but need zero filled memory allocation. */
4138 p
->p_type
= m
->p_type
;
4139 p
->p_flags
= m
->p_flags
;
4141 if (p
->p_type
== PT_LOAD
4144 bfd_size_type align
;
4146 unsigned int align_power
= 0;
4148 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4150 unsigned int secalign
;
4152 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4153 if (secalign
> align_power
)
4154 align_power
= secalign
;
4156 align
= (bfd_size_type
) 1 << align_power
;
4158 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> align
)
4159 align
= bed
->maxpagesize
;
4161 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4164 && !m
->includes_filehdr
4165 && !m
->includes_phdrs
4166 && (ufile_ptr
) off
>= align
)
4168 /* If the first section isn't loadable, the same holds for
4169 any other sections. Since the segment won't need file
4170 space, we can make p_offset overlap some prior segment.
4171 However, .tbss is special. If a segment starts with
4172 .tbss, we need to look at the next section to decide
4173 whether the segment has any loadable sections. */
4175 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4177 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4181 voff
= adjust
- align
;
4187 /* Make sure the .dynamic section is the first section in the
4188 PT_DYNAMIC segment. */
4189 else if (p
->p_type
== PT_DYNAMIC
4191 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4194 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4196 bfd_set_error (bfd_error_bad_value
);
4203 p
->p_vaddr
= m
->sections
[0]->vma
;
4205 if (m
->p_paddr_valid
)
4206 p
->p_paddr
= m
->p_paddr
;
4207 else if (m
->count
== 0)
4210 p
->p_paddr
= m
->sections
[0]->lma
;
4212 if (p
->p_type
== PT_LOAD
4213 && (abfd
->flags
& D_PAGED
) != 0)
4214 p
->p_align
= bed
->maxpagesize
;
4215 else if (m
->count
== 0)
4216 p
->p_align
= 1 << bed
->s
->log_file_align
;
4224 if (m
->includes_filehdr
)
4226 if (! m
->p_flags_valid
)
4229 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4230 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4233 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4235 if (p
->p_vaddr
< (bfd_vma
) off
)
4237 (*_bfd_error_handler
)
4238 (_("%B: Not enough room for program headers, try linking with -N"),
4240 bfd_set_error (bfd_error_bad_value
);
4245 if (! m
->p_paddr_valid
)
4248 if (p
->p_type
== PT_LOAD
)
4250 filehdr_vaddr
= p
->p_vaddr
;
4251 filehdr_paddr
= p
->p_paddr
;
4255 if (m
->includes_phdrs
)
4257 if (! m
->p_flags_valid
)
4260 if (m
->includes_filehdr
)
4262 if (p
->p_type
== PT_LOAD
)
4264 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4265 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4270 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4274 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4275 p
->p_vaddr
-= off
- p
->p_offset
;
4276 if (! m
->p_paddr_valid
)
4277 p
->p_paddr
-= off
- p
->p_offset
;
4280 if (p
->p_type
== PT_LOAD
)
4282 phdrs_vaddr
= p
->p_vaddr
;
4283 phdrs_paddr
= p
->p_paddr
;
4286 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4289 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4290 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4293 if (p
->p_type
== PT_LOAD
4294 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4296 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4297 p
->p_offset
= off
+ voff
;
4302 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4303 p
->p_filesz
+= adjust
;
4304 p
->p_memsz
+= adjust
;
4308 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4312 bfd_size_type align
;
4316 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4318 if (p
->p_type
== PT_LOAD
4319 || p
->p_type
== PT_TLS
)
4321 bfd_signed_vma adjust
;
4323 if ((flags
& SEC_LOAD
) != 0)
4325 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4328 (*_bfd_error_handler
)
4329 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4330 abfd
, sec
, (unsigned long) sec
->lma
);
4334 p
->p_filesz
+= adjust
;
4335 p
->p_memsz
+= adjust
;
4337 /* .tbss is special. It doesn't contribute to p_memsz of
4339 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4340 || p
->p_type
== PT_TLS
)
4342 /* The section VMA must equal the file position
4343 modulo the page size. */
4344 bfd_size_type page
= align
;
4345 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> page
)
4346 page
= bed
->maxpagesize
;
4347 adjust
= vma_page_aligned_bias (sec
->vma
,
4348 p
->p_vaddr
+ p
->p_memsz
,
4350 p
->p_memsz
+= adjust
;
4354 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4356 /* The section at i == 0 is the one that actually contains
4362 p
->p_filesz
= sec
->size
;
4368 /* The rest are fake sections that shouldn't be written. */
4377 if (p
->p_type
== PT_LOAD
)
4380 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4381 1997, and the exact reason for it isn't clear. One
4382 plausible explanation is that it is to work around
4383 a problem we have with linker scripts using data
4384 statements in NOLOAD sections. I don't think it
4385 makes a great deal of sense to have such a section
4386 assigned to a PT_LOAD segment, but apparently
4387 people do this. The data statement results in a
4388 bfd_data_link_order being built, and these need
4389 section contents to write into. Eventually, we get
4390 to _bfd_elf_write_object_contents which writes any
4391 section with contents to the output. Make room
4392 here for the write, so that following segments are
4394 if ((flags
& SEC_LOAD
) != 0
4395 || (flags
& SEC_HAS_CONTENTS
) != 0)
4399 if ((flags
& SEC_LOAD
) != 0)
4401 p
->p_filesz
+= sec
->size
;
4402 p
->p_memsz
+= sec
->size
;
4404 /* PR ld/594: Sections in note segments which are not loaded
4405 contribute to the file size but not the in-memory size. */
4406 else if (p
->p_type
== PT_NOTE
4407 && (flags
& SEC_HAS_CONTENTS
) != 0)
4408 p
->p_filesz
+= sec
->size
;
4410 /* .tbss is special. It doesn't contribute to p_memsz of
4412 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4413 || p
->p_type
== PT_TLS
)
4414 p
->p_memsz
+= sec
->size
;
4416 if (p
->p_type
== PT_TLS
4418 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4420 struct bfd_link_order
*o
;
4421 bfd_vma tbss_size
= 0;
4423 for (o
= sec
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
4424 if (tbss_size
< o
->offset
+ o
->size
)
4425 tbss_size
= o
->offset
+ o
->size
;
4427 p
->p_memsz
+= tbss_size
;
4430 if (align
> p
->p_align
4431 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4435 if (! m
->p_flags_valid
)
4438 if ((flags
& SEC_CODE
) != 0)
4440 if ((flags
& SEC_READONLY
) == 0)
4446 /* Now that we have set the section file positions, we can set up
4447 the file positions for the non PT_LOAD segments. */
4448 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4452 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4454 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4455 /* If the section has not yet been assigned a file position,
4456 do so now. The ARM BPABI requires that .dynamic section
4457 not be marked SEC_ALLOC because it is not part of any
4458 PT_LOAD segment, so it will not be processed above. */
4459 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4462 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4465 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4467 off
= (_bfd_elf_assign_file_position_for_section
4468 (i_shdrpp
[i
], off
, TRUE
));
4469 p
->p_filesz
= m
->sections
[0]->size
;
4471 p
->p_offset
= m
->sections
[0]->filepos
;
4475 if (m
->includes_filehdr
)
4477 p
->p_vaddr
= filehdr_vaddr
;
4478 if (! m
->p_paddr_valid
)
4479 p
->p_paddr
= filehdr_paddr
;
4481 else if (m
->includes_phdrs
)
4483 p
->p_vaddr
= phdrs_vaddr
;
4484 if (! m
->p_paddr_valid
)
4485 p
->p_paddr
= phdrs_paddr
;
4487 else if (p
->p_type
== PT_GNU_RELRO
)
4489 Elf_Internal_Phdr
*lp
;
4491 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4493 if (lp
->p_type
== PT_LOAD
4494 && lp
->p_vaddr
<= link_info
->relro_end
4495 && lp
->p_vaddr
>= link_info
->relro_start
4496 && lp
->p_vaddr
+ lp
->p_filesz
4497 >= link_info
->relro_end
)
4501 if (lp
< phdrs
+ count
4502 && link_info
->relro_end
> lp
->p_vaddr
)
4504 p
->p_vaddr
= lp
->p_vaddr
;
4505 p
->p_paddr
= lp
->p_paddr
;
4506 p
->p_offset
= lp
->p_offset
;
4507 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4508 p
->p_memsz
= p
->p_filesz
;
4510 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4514 memset (p
, 0, sizeof *p
);
4515 p
->p_type
= PT_NULL
;
4521 /* Clear out any program headers we allocated but did not use. */
4522 for (; count
< alloc
; count
++, p
++)
4524 memset (p
, 0, sizeof *p
);
4525 p
->p_type
= PT_NULL
;
4528 elf_tdata (abfd
)->phdr
= phdrs
;
4530 elf_tdata (abfd
)->next_file_pos
= off
;
4532 /* Write out the program headers. */
4533 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4534 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4540 /* Get the size of the program header.
4542 If this is called by the linker before any of the section VMA's are set, it
4543 can't calculate the correct value for a strange memory layout. This only
4544 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4545 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4546 data segment (exclusive of .interp and .dynamic).
4548 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4549 will be two segments. */
4551 static bfd_size_type
4552 get_program_header_size (bfd
*abfd
)
4556 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4558 /* We can't return a different result each time we're called. */
4559 if (elf_tdata (abfd
)->program_header_size
!= 0)
4560 return elf_tdata (abfd
)->program_header_size
;
4562 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4564 struct elf_segment_map
*m
;
4567 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4569 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4570 return elf_tdata (abfd
)->program_header_size
;
4573 /* Assume we will need exactly two PT_LOAD segments: one for text
4574 and one for data. */
4577 s
= bfd_get_section_by_name (abfd
, ".interp");
4578 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4580 /* If we have a loadable interpreter section, we need a
4581 PT_INTERP segment. In this case, assume we also need a
4582 PT_PHDR segment, although that may not be true for all
4587 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4589 /* We need a PT_DYNAMIC segment. */
4593 if (elf_tdata (abfd
)->eh_frame_hdr
)
4595 /* We need a PT_GNU_EH_FRAME segment. */
4599 if (elf_tdata (abfd
)->stack_flags
)
4601 /* We need a PT_GNU_STACK segment. */
4605 if (elf_tdata (abfd
)->relro
)
4607 /* We need a PT_GNU_RELRO segment. */
4611 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4613 if ((s
->flags
& SEC_LOAD
) != 0
4614 && strncmp (s
->name
, ".note", 5) == 0)
4616 /* We need a PT_NOTE segment. */
4621 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4623 if (s
->flags
& SEC_THREAD_LOCAL
)
4625 /* We need a PT_TLS segment. */
4631 /* Let the backend count up any program headers it might need. */
4632 if (bed
->elf_backend_additional_program_headers
)
4636 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4642 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4643 return elf_tdata (abfd
)->program_header_size
;
4646 /* Work out the file positions of all the sections. This is called by
4647 _bfd_elf_compute_section_file_positions. All the section sizes and
4648 VMAs must be known before this is called.
4650 Reloc sections come in two flavours: Those processed specially as
4651 "side-channel" data attached to a section to which they apply, and
4652 those that bfd doesn't process as relocations. The latter sort are
4653 stored in a normal bfd section by bfd_section_from_shdr. We don't
4654 consider the former sort here, unless they form part of the loadable
4655 image. Reloc sections not assigned here will be handled later by
4656 assign_file_positions_for_relocs.
4658 We also don't set the positions of the .symtab and .strtab here. */
4661 assign_file_positions_except_relocs (bfd
*abfd
,
4662 struct bfd_link_info
*link_info
)
4664 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4665 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4666 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4667 unsigned int num_sec
= elf_numsections (abfd
);
4669 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4671 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4672 && bfd_get_format (abfd
) != bfd_core
)
4674 Elf_Internal_Shdr
**hdrpp
;
4677 /* Start after the ELF header. */
4678 off
= i_ehdrp
->e_ehsize
;
4680 /* We are not creating an executable, which means that we are
4681 not creating a program header, and that the actual order of
4682 the sections in the file is unimportant. */
4683 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4685 Elf_Internal_Shdr
*hdr
;
4688 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4689 && hdr
->bfd_section
== NULL
)
4690 || i
== tdata
->symtab_section
4691 || i
== tdata
->symtab_shndx_section
4692 || i
== tdata
->strtab_section
)
4694 hdr
->sh_offset
= -1;
4697 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4699 if (i
== SHN_LORESERVE
- 1)
4701 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4702 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4709 Elf_Internal_Shdr
**hdrpp
;
4711 /* Assign file positions for the loaded sections based on the
4712 assignment of sections to segments. */
4713 if (! assign_file_positions_for_segments (abfd
, link_info
))
4716 /* Assign file positions for the other sections. */
4718 off
= elf_tdata (abfd
)->next_file_pos
;
4719 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4721 Elf_Internal_Shdr
*hdr
;
4724 if (hdr
->bfd_section
!= NULL
4725 && hdr
->bfd_section
->filepos
!= 0)
4726 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4727 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4729 ((*_bfd_error_handler
)
4730 (_("%B: warning: allocated section `%s' not in segment"),
4732 (hdr
->bfd_section
== NULL
4734 : hdr
->bfd_section
->name
)));
4735 if ((abfd
->flags
& D_PAGED
) != 0)
4736 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4739 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4741 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4744 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4745 && hdr
->bfd_section
== NULL
)
4746 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4747 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4748 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4749 hdr
->sh_offset
= -1;
4751 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4753 if (i
== SHN_LORESERVE
- 1)
4755 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4756 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4761 /* Place the section headers. */
4762 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4763 i_ehdrp
->e_shoff
= off
;
4764 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4766 elf_tdata (abfd
)->next_file_pos
= off
;
4772 prep_headers (bfd
*abfd
)
4774 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4775 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4776 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4777 struct elf_strtab_hash
*shstrtab
;
4778 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4780 i_ehdrp
= elf_elfheader (abfd
);
4781 i_shdrp
= elf_elfsections (abfd
);
4783 shstrtab
= _bfd_elf_strtab_init ();
4784 if (shstrtab
== NULL
)
4787 elf_shstrtab (abfd
) = shstrtab
;
4789 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4790 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4791 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4792 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4794 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4795 i_ehdrp
->e_ident
[EI_DATA
] =
4796 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4797 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4799 if ((abfd
->flags
& DYNAMIC
) != 0)
4800 i_ehdrp
->e_type
= ET_DYN
;
4801 else if ((abfd
->flags
& EXEC_P
) != 0)
4802 i_ehdrp
->e_type
= ET_EXEC
;
4803 else if (bfd_get_format (abfd
) == bfd_core
)
4804 i_ehdrp
->e_type
= ET_CORE
;
4806 i_ehdrp
->e_type
= ET_REL
;
4808 switch (bfd_get_arch (abfd
))
4810 case bfd_arch_unknown
:
4811 i_ehdrp
->e_machine
= EM_NONE
;
4814 /* There used to be a long list of cases here, each one setting
4815 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4816 in the corresponding bfd definition. To avoid duplication,
4817 the switch was removed. Machines that need special handling
4818 can generally do it in elf_backend_final_write_processing(),
4819 unless they need the information earlier than the final write.
4820 Such need can generally be supplied by replacing the tests for
4821 e_machine with the conditions used to determine it. */
4823 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4826 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4827 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4829 /* No program header, for now. */
4830 i_ehdrp
->e_phoff
= 0;
4831 i_ehdrp
->e_phentsize
= 0;
4832 i_ehdrp
->e_phnum
= 0;
4834 /* Each bfd section is section header entry. */
4835 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4836 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4838 /* If we're building an executable, we'll need a program header table. */
4839 if (abfd
->flags
& EXEC_P
)
4840 /* It all happens later. */
4844 i_ehdrp
->e_phentsize
= 0;
4846 i_ehdrp
->e_phoff
= 0;
4849 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4850 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4851 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4852 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4853 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4854 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4855 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4856 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4857 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4863 /* Assign file positions for all the reloc sections which are not part
4864 of the loadable file image. */
4867 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4870 unsigned int i
, num_sec
;
4871 Elf_Internal_Shdr
**shdrpp
;
4873 off
= elf_tdata (abfd
)->next_file_pos
;
4875 num_sec
= elf_numsections (abfd
);
4876 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4878 Elf_Internal_Shdr
*shdrp
;
4881 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4882 && shdrp
->sh_offset
== -1)
4883 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4886 elf_tdata (abfd
)->next_file_pos
= off
;
4890 _bfd_elf_write_object_contents (bfd
*abfd
)
4892 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4893 Elf_Internal_Ehdr
*i_ehdrp
;
4894 Elf_Internal_Shdr
**i_shdrp
;
4896 unsigned int count
, num_sec
;
4898 if (! abfd
->output_has_begun
4899 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4902 i_shdrp
= elf_elfsections (abfd
);
4903 i_ehdrp
= elf_elfheader (abfd
);
4906 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4910 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4912 /* After writing the headers, we need to write the sections too... */
4913 num_sec
= elf_numsections (abfd
);
4914 for (count
= 1; count
< num_sec
; count
++)
4916 if (bed
->elf_backend_section_processing
)
4917 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4918 if (i_shdrp
[count
]->contents
)
4920 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4922 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4923 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4926 if (count
== SHN_LORESERVE
- 1)
4927 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4930 /* Write out the section header names. */
4931 if (elf_shstrtab (abfd
) != NULL
4932 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4933 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4936 if (bed
->elf_backend_final_write_processing
)
4937 (*bed
->elf_backend_final_write_processing
) (abfd
,
4938 elf_tdata (abfd
)->linker
);
4940 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4944 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4946 /* Hopefully this can be done just like an object file. */
4947 return _bfd_elf_write_object_contents (abfd
);
4950 /* Given a section, search the header to find them. */
4953 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4955 const struct elf_backend_data
*bed
;
4958 if (elf_section_data (asect
) != NULL
4959 && elf_section_data (asect
)->this_idx
!= 0)
4960 return elf_section_data (asect
)->this_idx
;
4962 if (bfd_is_abs_section (asect
))
4964 else if (bfd_is_com_section (asect
))
4966 else if (bfd_is_und_section (asect
))
4971 bed
= get_elf_backend_data (abfd
);
4972 if (bed
->elf_backend_section_from_bfd_section
)
4976 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4981 bfd_set_error (bfd_error_nonrepresentable_section
);
4986 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4990 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4992 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4994 flagword flags
= asym_ptr
->flags
;
4996 /* When gas creates relocations against local labels, it creates its
4997 own symbol for the section, but does put the symbol into the
4998 symbol chain, so udata is 0. When the linker is generating
4999 relocatable output, this section symbol may be for one of the
5000 input sections rather than the output section. */
5001 if (asym_ptr
->udata
.i
== 0
5002 && (flags
& BSF_SECTION_SYM
)
5003 && asym_ptr
->section
)
5007 if (asym_ptr
->section
->output_section
!= NULL
)
5008 indx
= asym_ptr
->section
->output_section
->index
;
5010 indx
= asym_ptr
->section
->index
;
5011 if (indx
< elf_num_section_syms (abfd
)
5012 && elf_section_syms (abfd
)[indx
] != NULL
)
5013 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
5016 idx
= asym_ptr
->udata
.i
;
5020 /* This case can occur when using --strip-symbol on a symbol
5021 which is used in a relocation entry. */
5022 (*_bfd_error_handler
)
5023 (_("%B: symbol `%s' required but not present"),
5024 abfd
, bfd_asymbol_name (asym_ptr
));
5025 bfd_set_error (bfd_error_no_symbols
);
5032 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5033 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5034 elf_symbol_flags (flags
));
5042 /* Copy private BFD data. This copies any program header information. */
5045 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5047 Elf_Internal_Ehdr
*iehdr
;
5048 struct elf_segment_map
*map
;
5049 struct elf_segment_map
*map_first
;
5050 struct elf_segment_map
**pointer_to_map
;
5051 Elf_Internal_Phdr
*segment
;
5054 unsigned int num_segments
;
5055 bfd_boolean phdr_included
= FALSE
;
5056 bfd_vma maxpagesize
;
5057 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5058 unsigned int phdr_adjust_num
= 0;
5059 const struct elf_backend_data
*bed
;
5061 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5062 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5065 if (elf_tdata (ibfd
)->phdr
== NULL
)
5068 bed
= get_elf_backend_data (ibfd
);
5069 iehdr
= elf_elfheader (ibfd
);
5072 pointer_to_map
= &map_first
;
5074 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5075 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5077 /* Returns the end address of the segment + 1. */
5078 #define SEGMENT_END(segment, start) \
5079 (start + (segment->p_memsz > segment->p_filesz \
5080 ? segment->p_memsz : segment->p_filesz))
5082 #define SECTION_SIZE(section, segment) \
5083 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5084 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5085 ? section->size : 0)
5087 /* Returns TRUE if the given section is contained within
5088 the given segment. VMA addresses are compared. */
5089 #define IS_CONTAINED_BY_VMA(section, segment) \
5090 (section->vma >= segment->p_vaddr \
5091 && (section->vma + SECTION_SIZE (section, segment) \
5092 <= (SEGMENT_END (segment, segment->p_vaddr))))
5094 /* Returns TRUE if the given section is contained within
5095 the given segment. LMA addresses are compared. */
5096 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5097 (section->lma >= base \
5098 && (section->lma + SECTION_SIZE (section, segment) \
5099 <= SEGMENT_END (segment, base)))
5101 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5102 #define IS_COREFILE_NOTE(p, s) \
5103 (p->p_type == PT_NOTE \
5104 && bfd_get_format (ibfd) == bfd_core \
5105 && s->vma == 0 && s->lma == 0 \
5106 && (bfd_vma) s->filepos >= p->p_offset \
5107 && ((bfd_vma) s->filepos + s->size \
5108 <= p->p_offset + p->p_filesz))
5110 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5111 linker, which generates a PT_INTERP section with p_vaddr and
5112 p_memsz set to 0. */
5113 #define IS_SOLARIS_PT_INTERP(p, s) \
5115 && p->p_paddr == 0 \
5116 && p->p_memsz == 0 \
5117 && p->p_filesz > 0 \
5118 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5120 && (bfd_vma) s->filepos >= p->p_offset \
5121 && ((bfd_vma) s->filepos + s->size \
5122 <= p->p_offset + p->p_filesz))
5124 /* Decide if the given section should be included in the given segment.
5125 A section will be included if:
5126 1. It is within the address space of the segment -- we use the LMA
5127 if that is set for the segment and the VMA otherwise,
5128 2. It is an allocated segment,
5129 3. There is an output section associated with it,
5130 4. The section has not already been allocated to a previous segment.
5131 5. PT_GNU_STACK segments do not include any sections.
5132 6. PT_TLS segment includes only SHF_TLS sections.
5133 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5134 8. PT_DYNAMIC should not contain empty sections at the beginning
5135 (with the possible exception of .dynamic). */
5136 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5137 ((((segment->p_paddr \
5138 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5139 : IS_CONTAINED_BY_VMA (section, segment)) \
5140 && (section->flags & SEC_ALLOC) != 0) \
5141 || IS_COREFILE_NOTE (segment, section)) \
5142 && section->output_section != NULL \
5143 && segment->p_type != PT_GNU_STACK \
5144 && (segment->p_type != PT_TLS \
5145 || (section->flags & SEC_THREAD_LOCAL)) \
5146 && (segment->p_type == PT_LOAD \
5147 || segment->p_type == PT_TLS \
5148 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5149 && (segment->p_type != PT_DYNAMIC \
5150 || SECTION_SIZE (section, segment) > 0 \
5151 || (segment->p_paddr \
5152 ? segment->p_paddr != section->lma \
5153 : segment->p_vaddr != section->vma) \
5154 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5156 && ! section->segment_mark)
5158 /* Returns TRUE iff seg1 starts after the end of seg2. */
5159 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5160 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5162 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5163 their VMA address ranges and their LMA address ranges overlap.
5164 It is possible to have overlapping VMA ranges without overlapping LMA
5165 ranges. RedBoot images for example can have both .data and .bss mapped
5166 to the same VMA range, but with the .data section mapped to a different
5168 #define SEGMENT_OVERLAPS(seg1, seg2) \
5169 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5170 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5171 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5172 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5174 /* Initialise the segment mark field. */
5175 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5176 section
->segment_mark
= FALSE
;
5178 /* Scan through the segments specified in the program header
5179 of the input BFD. For this first scan we look for overlaps
5180 in the loadable segments. These can be created by weird
5181 parameters to objcopy. Also, fix some solaris weirdness. */
5182 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5187 Elf_Internal_Phdr
*segment2
;
5189 if (segment
->p_type
== PT_INTERP
)
5190 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5191 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5193 /* Mininal change so that the normal section to segment
5194 assignment code will work. */
5195 segment
->p_vaddr
= section
->vma
;
5199 if (segment
->p_type
!= PT_LOAD
)
5202 /* Determine if this segment overlaps any previous segments. */
5203 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5205 bfd_signed_vma extra_length
;
5207 if (segment2
->p_type
!= PT_LOAD
5208 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5211 /* Merge the two segments together. */
5212 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5214 /* Extend SEGMENT2 to include SEGMENT and then delete
5217 SEGMENT_END (segment
, segment
->p_vaddr
)
5218 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5220 if (extra_length
> 0)
5222 segment2
->p_memsz
+= extra_length
;
5223 segment2
->p_filesz
+= extra_length
;
5226 segment
->p_type
= PT_NULL
;
5228 /* Since we have deleted P we must restart the outer loop. */
5230 segment
= elf_tdata (ibfd
)->phdr
;
5235 /* Extend SEGMENT to include SEGMENT2 and then delete
5238 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5239 - SEGMENT_END (segment
, segment
->p_vaddr
);
5241 if (extra_length
> 0)
5243 segment
->p_memsz
+= extra_length
;
5244 segment
->p_filesz
+= extra_length
;
5247 segment2
->p_type
= PT_NULL
;
5252 /* The second scan attempts to assign sections to segments. */
5253 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5257 unsigned int section_count
;
5258 asection
** sections
;
5259 asection
* output_section
;
5261 bfd_vma matching_lma
;
5262 bfd_vma suggested_lma
;
5266 if (segment
->p_type
== PT_NULL
)
5269 /* Compute how many sections might be placed into this segment. */
5270 for (section
= ibfd
->sections
, section_count
= 0;
5272 section
= section
->next
)
5273 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5276 /* Allocate a segment map big enough to contain
5277 all of the sections we have selected. */
5278 amt
= sizeof (struct elf_segment_map
);
5279 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5280 map
= bfd_alloc (obfd
, amt
);
5284 /* Initialise the fields of the segment map. Default to
5285 using the physical address of the segment in the input BFD. */
5287 map
->p_type
= segment
->p_type
;
5288 map
->p_flags
= segment
->p_flags
;
5289 map
->p_flags_valid
= 1;
5290 map
->p_paddr
= segment
->p_paddr
;
5291 map
->p_paddr_valid
= 1;
5293 /* Determine if this segment contains the ELF file header
5294 and if it contains the program headers themselves. */
5295 map
->includes_filehdr
= (segment
->p_offset
== 0
5296 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5298 map
->includes_phdrs
= 0;
5300 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5302 map
->includes_phdrs
=
5303 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5304 && (segment
->p_offset
+ segment
->p_filesz
5305 >= ((bfd_vma
) iehdr
->e_phoff
5306 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5308 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5309 phdr_included
= TRUE
;
5312 if (section_count
== 0)
5314 /* Special segments, such as the PT_PHDR segment, may contain
5315 no sections, but ordinary, loadable segments should contain
5316 something. They are allowed by the ELF spec however, so only
5317 a warning is produced. */
5318 if (segment
->p_type
== PT_LOAD
)
5319 (*_bfd_error_handler
)
5320 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5324 *pointer_to_map
= map
;
5325 pointer_to_map
= &map
->next
;
5330 /* Now scan the sections in the input BFD again and attempt
5331 to add their corresponding output sections to the segment map.
5332 The problem here is how to handle an output section which has
5333 been moved (ie had its LMA changed). There are four possibilities:
5335 1. None of the sections have been moved.
5336 In this case we can continue to use the segment LMA from the
5339 2. All of the sections have been moved by the same amount.
5340 In this case we can change the segment's LMA to match the LMA
5341 of the first section.
5343 3. Some of the sections have been moved, others have not.
5344 In this case those sections which have not been moved can be
5345 placed in the current segment which will have to have its size,
5346 and possibly its LMA changed, and a new segment or segments will
5347 have to be created to contain the other sections.
5349 4. The sections have been moved, but not by the same amount.
5350 In this case we can change the segment's LMA to match the LMA
5351 of the first section and we will have to create a new segment
5352 or segments to contain the other sections.
5354 In order to save time, we allocate an array to hold the section
5355 pointers that we are interested in. As these sections get assigned
5356 to a segment, they are removed from this array. */
5358 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5359 to work around this long long bug. */
5360 sections
= bfd_malloc2 (section_count
, sizeof (asection
*));
5361 if (sections
== NULL
)
5364 /* Step One: Scan for segment vs section LMA conflicts.
5365 Also add the sections to the section array allocated above.
5366 Also add the sections to the current segment. In the common
5367 case, where the sections have not been moved, this means that
5368 we have completely filled the segment, and there is nothing
5374 for (j
= 0, section
= ibfd
->sections
;
5376 section
= section
->next
)
5378 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5380 output_section
= section
->output_section
;
5382 sections
[j
++] = section
;
5384 /* The Solaris native linker always sets p_paddr to 0.
5385 We try to catch that case here, and set it to the
5386 correct value. Note - some backends require that
5387 p_paddr be left as zero. */
5388 if (segment
->p_paddr
== 0
5389 && segment
->p_vaddr
!= 0
5390 && (! bed
->want_p_paddr_set_to_zero
)
5392 && output_section
->lma
!= 0
5393 && (output_section
->vma
== (segment
->p_vaddr
5394 + (map
->includes_filehdr
5397 + (map
->includes_phdrs
5399 * iehdr
->e_phentsize
)
5401 map
->p_paddr
= segment
->p_vaddr
;
5403 /* Match up the physical address of the segment with the
5404 LMA address of the output section. */
5405 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5406 || IS_COREFILE_NOTE (segment
, section
)
5407 || (bed
->want_p_paddr_set_to_zero
&&
5408 IS_CONTAINED_BY_VMA (output_section
, segment
))
5411 if (matching_lma
== 0)
5412 matching_lma
= output_section
->lma
;
5414 /* We assume that if the section fits within the segment
5415 then it does not overlap any other section within that
5417 map
->sections
[isec
++] = output_section
;
5419 else if (suggested_lma
== 0)
5420 suggested_lma
= output_section
->lma
;
5424 BFD_ASSERT (j
== section_count
);
5426 /* Step Two: Adjust the physical address of the current segment,
5428 if (isec
== section_count
)
5430 /* All of the sections fitted within the segment as currently
5431 specified. This is the default case. Add the segment to
5432 the list of built segments and carry on to process the next
5433 program header in the input BFD. */
5434 map
->count
= section_count
;
5435 *pointer_to_map
= map
;
5436 pointer_to_map
= &map
->next
;
5443 if (matching_lma
!= 0)
5445 /* At least one section fits inside the current segment.
5446 Keep it, but modify its physical address to match the
5447 LMA of the first section that fitted. */
5448 map
->p_paddr
= matching_lma
;
5452 /* None of the sections fitted inside the current segment.
5453 Change the current segment's physical address to match
5454 the LMA of the first section. */
5455 map
->p_paddr
= suggested_lma
;
5458 /* Offset the segment physical address from the lma
5459 to allow for space taken up by elf headers. */
5460 if (map
->includes_filehdr
)
5461 map
->p_paddr
-= iehdr
->e_ehsize
;
5463 if (map
->includes_phdrs
)
5465 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5467 /* iehdr->e_phnum is just an estimate of the number
5468 of program headers that we will need. Make a note
5469 here of the number we used and the segment we chose
5470 to hold these headers, so that we can adjust the
5471 offset when we know the correct value. */
5472 phdr_adjust_num
= iehdr
->e_phnum
;
5473 phdr_adjust_seg
= map
;
5477 /* Step Three: Loop over the sections again, this time assigning
5478 those that fit to the current segment and removing them from the
5479 sections array; but making sure not to leave large gaps. Once all
5480 possible sections have been assigned to the current segment it is
5481 added to the list of built segments and if sections still remain
5482 to be assigned, a new segment is constructed before repeating
5490 /* Fill the current segment with sections that fit. */
5491 for (j
= 0; j
< section_count
; j
++)
5493 section
= sections
[j
];
5495 if (section
== NULL
)
5498 output_section
= section
->output_section
;
5500 BFD_ASSERT (output_section
!= NULL
);
5502 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5503 || IS_COREFILE_NOTE (segment
, section
))
5505 if (map
->count
== 0)
5507 /* If the first section in a segment does not start at
5508 the beginning of the segment, then something is
5510 if (output_section
->lma
!=
5512 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5513 + (map
->includes_phdrs
5514 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5520 asection
* prev_sec
;
5522 prev_sec
= map
->sections
[map
->count
- 1];
5524 /* If the gap between the end of the previous section
5525 and the start of this section is more than
5526 maxpagesize then we need to start a new segment. */
5527 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5529 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5530 || ((prev_sec
->lma
+ prev_sec
->size
)
5531 > output_section
->lma
))
5533 if (suggested_lma
== 0)
5534 suggested_lma
= output_section
->lma
;
5540 map
->sections
[map
->count
++] = output_section
;
5543 section
->segment_mark
= TRUE
;
5545 else if (suggested_lma
== 0)
5546 suggested_lma
= output_section
->lma
;
5549 BFD_ASSERT (map
->count
> 0);
5551 /* Add the current segment to the list of built segments. */
5552 *pointer_to_map
= map
;
5553 pointer_to_map
= &map
->next
;
5555 if (isec
< section_count
)
5557 /* We still have not allocated all of the sections to
5558 segments. Create a new segment here, initialise it
5559 and carry on looping. */
5560 amt
= sizeof (struct elf_segment_map
);
5561 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5562 map
= bfd_alloc (obfd
, amt
);
5569 /* Initialise the fields of the segment map. Set the physical
5570 physical address to the LMA of the first section that has
5571 not yet been assigned. */
5573 map
->p_type
= segment
->p_type
;
5574 map
->p_flags
= segment
->p_flags
;
5575 map
->p_flags_valid
= 1;
5576 map
->p_paddr
= suggested_lma
;
5577 map
->p_paddr_valid
= 1;
5578 map
->includes_filehdr
= 0;
5579 map
->includes_phdrs
= 0;
5582 while (isec
< section_count
);
5587 /* The Solaris linker creates program headers in which all the
5588 p_paddr fields are zero. When we try to objcopy or strip such a
5589 file, we get confused. Check for this case, and if we find it
5590 reset the p_paddr_valid fields. */
5591 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5592 if (map
->p_paddr
!= 0)
5595 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5596 map
->p_paddr_valid
= 0;
5598 elf_tdata (obfd
)->segment_map
= map_first
;
5600 /* If we had to estimate the number of program headers that were
5601 going to be needed, then check our estimate now and adjust
5602 the offset if necessary. */
5603 if (phdr_adjust_seg
!= NULL
)
5607 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5610 if (count
> phdr_adjust_num
)
5611 phdr_adjust_seg
->p_paddr
5612 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5617 #undef IS_CONTAINED_BY_VMA
5618 #undef IS_CONTAINED_BY_LMA
5619 #undef IS_COREFILE_NOTE
5620 #undef IS_SOLARIS_PT_INTERP
5621 #undef INCLUDE_SECTION_IN_SEGMENT
5622 #undef SEGMENT_AFTER_SEGMENT
5623 #undef SEGMENT_OVERLAPS
5627 /* Copy private section information. This copies over the entsize
5628 field, and sometimes the info field. */
5631 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5636 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5638 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5639 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5642 ihdr
= &elf_section_data (isec
)->this_hdr
;
5643 ohdr
= &elf_section_data (osec
)->this_hdr
;
5645 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5647 if (ihdr
->sh_type
== SHT_SYMTAB
5648 || ihdr
->sh_type
== SHT_DYNSYM
5649 || ihdr
->sh_type
== SHT_GNU_verneed
5650 || ihdr
->sh_type
== SHT_GNU_verdef
)
5651 ohdr
->sh_info
= ihdr
->sh_info
;
5653 /* Set things up for objcopy. The output SHT_GROUP section will
5654 have its elf_next_in_group pointing back to the input group
5655 members. Ignore linker created group section. See
5656 elfNN_ia64_object_p in elfxx-ia64.c. */
5657 if (elf_sec_group (isec
) == NULL
5658 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5660 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5661 elf_group_name (osec
) = elf_group_name (isec
);
5664 osec
->use_rela_p
= isec
->use_rela_p
;
5669 /* Copy private header information. */
5672 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5674 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5675 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5678 /* Copy over private BFD data if it has not already been copied.
5679 This must be done here, rather than in the copy_private_bfd_data
5680 entry point, because the latter is called after the section
5681 contents have been set, which means that the program headers have
5682 already been worked out. */
5683 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5685 if (! copy_private_bfd_data (ibfd
, obfd
))
5692 /* Copy private symbol information. If this symbol is in a section
5693 which we did not map into a BFD section, try to map the section
5694 index correctly. We use special macro definitions for the mapped
5695 section indices; these definitions are interpreted by the
5696 swap_out_syms function. */
5698 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5699 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5700 #define MAP_STRTAB (SHN_HIOS + 3)
5701 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5702 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5705 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5710 elf_symbol_type
*isym
, *osym
;
5712 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5713 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5716 isym
= elf_symbol_from (ibfd
, isymarg
);
5717 osym
= elf_symbol_from (obfd
, osymarg
);
5721 && bfd_is_abs_section (isym
->symbol
.section
))
5725 shndx
= isym
->internal_elf_sym
.st_shndx
;
5726 if (shndx
== elf_onesymtab (ibfd
))
5727 shndx
= MAP_ONESYMTAB
;
5728 else if (shndx
== elf_dynsymtab (ibfd
))
5729 shndx
= MAP_DYNSYMTAB
;
5730 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5732 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5733 shndx
= MAP_SHSTRTAB
;
5734 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5735 shndx
= MAP_SYM_SHNDX
;
5736 osym
->internal_elf_sym
.st_shndx
= shndx
;
5742 /* Swap out the symbols. */
5745 swap_out_syms (bfd
*abfd
,
5746 struct bfd_strtab_hash
**sttp
,
5749 const struct elf_backend_data
*bed
;
5752 struct bfd_strtab_hash
*stt
;
5753 Elf_Internal_Shdr
*symtab_hdr
;
5754 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5755 Elf_Internal_Shdr
*symstrtab_hdr
;
5756 bfd_byte
*outbound_syms
;
5757 bfd_byte
*outbound_shndx
;
5760 bfd_boolean name_local_sections
;
5762 if (!elf_map_symbols (abfd
))
5765 /* Dump out the symtabs. */
5766 stt
= _bfd_elf_stringtab_init ();
5770 bed
= get_elf_backend_data (abfd
);
5771 symcount
= bfd_get_symcount (abfd
);
5772 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5773 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5774 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5775 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5776 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5777 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5779 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5780 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5782 outbound_syms
= bfd_alloc2 (abfd
, 1 + symcount
, bed
->s
->sizeof_sym
);
5783 if (outbound_syms
== NULL
)
5785 _bfd_stringtab_free (stt
);
5788 symtab_hdr
->contents
= outbound_syms
;
5790 outbound_shndx
= NULL
;
5791 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5792 if (symtab_shndx_hdr
->sh_name
!= 0)
5794 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5795 outbound_shndx
= bfd_zalloc2 (abfd
, 1 + symcount
,
5796 sizeof (Elf_External_Sym_Shndx
));
5797 if (outbound_shndx
== NULL
)
5799 _bfd_stringtab_free (stt
);
5803 symtab_shndx_hdr
->contents
= outbound_shndx
;
5804 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5805 symtab_shndx_hdr
->sh_size
= amt
;
5806 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5807 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5810 /* Now generate the data (for "contents"). */
5812 /* Fill in zeroth symbol and swap it out. */
5813 Elf_Internal_Sym sym
;
5819 sym
.st_shndx
= SHN_UNDEF
;
5820 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5821 outbound_syms
+= bed
->s
->sizeof_sym
;
5822 if (outbound_shndx
!= NULL
)
5823 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5827 = (bed
->elf_backend_name_local_section_symbols
5828 && bed
->elf_backend_name_local_section_symbols (abfd
));
5830 syms
= bfd_get_outsymbols (abfd
);
5831 for (idx
= 0; idx
< symcount
; idx
++)
5833 Elf_Internal_Sym sym
;
5834 bfd_vma value
= syms
[idx
]->value
;
5835 elf_symbol_type
*type_ptr
;
5836 flagword flags
= syms
[idx
]->flags
;
5839 if (!name_local_sections
5840 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5842 /* Local section symbols have no name. */
5847 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5850 if (sym
.st_name
== (unsigned long) -1)
5852 _bfd_stringtab_free (stt
);
5857 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5859 if ((flags
& BSF_SECTION_SYM
) == 0
5860 && bfd_is_com_section (syms
[idx
]->section
))
5862 /* ELF common symbols put the alignment into the `value' field,
5863 and the size into the `size' field. This is backwards from
5864 how BFD handles it, so reverse it here. */
5865 sym
.st_size
= value
;
5866 if (type_ptr
== NULL
5867 || type_ptr
->internal_elf_sym
.st_value
== 0)
5868 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5870 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5871 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5872 (abfd
, syms
[idx
]->section
);
5876 asection
*sec
= syms
[idx
]->section
;
5879 if (sec
->output_section
)
5881 value
+= sec
->output_offset
;
5882 sec
= sec
->output_section
;
5885 /* Don't add in the section vma for relocatable output. */
5886 if (! relocatable_p
)
5888 sym
.st_value
= value
;
5889 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5891 if (bfd_is_abs_section (sec
)
5893 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5895 /* This symbol is in a real ELF section which we did
5896 not create as a BFD section. Undo the mapping done
5897 by copy_private_symbol_data. */
5898 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5902 shndx
= elf_onesymtab (abfd
);
5905 shndx
= elf_dynsymtab (abfd
);
5908 shndx
= elf_tdata (abfd
)->strtab_section
;
5911 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5914 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5922 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5928 /* Writing this would be a hell of a lot easier if
5929 we had some decent documentation on bfd, and
5930 knew what to expect of the library, and what to
5931 demand of applications. For example, it
5932 appears that `objcopy' might not set the
5933 section of a symbol to be a section that is
5934 actually in the output file. */
5935 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5938 _bfd_error_handler (_("\
5939 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5940 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5942 bfd_set_error (bfd_error_invalid_operation
);
5943 _bfd_stringtab_free (stt
);
5947 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5948 BFD_ASSERT (shndx
!= -1);
5952 sym
.st_shndx
= shndx
;
5955 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5957 else if ((flags
& BSF_FUNCTION
) != 0)
5959 else if ((flags
& BSF_OBJECT
) != 0)
5964 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5967 /* Processor-specific types. */
5968 if (type_ptr
!= NULL
5969 && bed
->elf_backend_get_symbol_type
)
5970 type
= ((*bed
->elf_backend_get_symbol_type
)
5971 (&type_ptr
->internal_elf_sym
, type
));
5973 if (flags
& BSF_SECTION_SYM
)
5975 if (flags
& BSF_GLOBAL
)
5976 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5978 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5980 else if (bfd_is_com_section (syms
[idx
]->section
))
5981 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5982 else if (bfd_is_und_section (syms
[idx
]->section
))
5983 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5987 else if (flags
& BSF_FILE
)
5988 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5991 int bind
= STB_LOCAL
;
5993 if (flags
& BSF_LOCAL
)
5995 else if (flags
& BSF_WEAK
)
5997 else if (flags
& BSF_GLOBAL
)
6000 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6003 if (type_ptr
!= NULL
)
6004 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6008 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6009 outbound_syms
+= bed
->s
->sizeof_sym
;
6010 if (outbound_shndx
!= NULL
)
6011 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6015 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6016 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6018 symstrtab_hdr
->sh_flags
= 0;
6019 symstrtab_hdr
->sh_addr
= 0;
6020 symstrtab_hdr
->sh_entsize
= 0;
6021 symstrtab_hdr
->sh_link
= 0;
6022 symstrtab_hdr
->sh_info
= 0;
6023 symstrtab_hdr
->sh_addralign
= 1;
6028 /* Return the number of bytes required to hold the symtab vector.
6030 Note that we base it on the count plus 1, since we will null terminate
6031 the vector allocated based on this size. However, the ELF symbol table
6032 always has a dummy entry as symbol #0, so it ends up even. */
6035 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6039 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6041 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6042 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6044 symtab_size
-= sizeof (asymbol
*);
6050 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6054 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6056 if (elf_dynsymtab (abfd
) == 0)
6058 bfd_set_error (bfd_error_invalid_operation
);
6062 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6063 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6065 symtab_size
-= sizeof (asymbol
*);
6071 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6074 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6077 /* Canonicalize the relocs. */
6080 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6087 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6089 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6092 tblptr
= section
->relocation
;
6093 for (i
= 0; i
< section
->reloc_count
; i
++)
6094 *relptr
++ = tblptr
++;
6098 return section
->reloc_count
;
6102 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6104 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6105 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6108 bfd_get_symcount (abfd
) = symcount
;
6113 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6114 asymbol
**allocation
)
6116 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6117 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6120 bfd_get_dynamic_symcount (abfd
) = symcount
;
6124 /* Return the size required for the dynamic reloc entries. Any loadable
6125 section that was actually installed in the BFD, and has type SHT_REL
6126 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6127 dynamic reloc section. */
6130 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6135 if (elf_dynsymtab (abfd
) == 0)
6137 bfd_set_error (bfd_error_invalid_operation
);
6141 ret
= sizeof (arelent
*);
6142 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6143 if ((s
->flags
& SEC_LOAD
) != 0
6144 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6145 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6146 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6147 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6148 * sizeof (arelent
*));
6153 /* Canonicalize the dynamic relocation entries. Note that we return the
6154 dynamic relocations as a single block, although they are actually
6155 associated with particular sections; the interface, which was
6156 designed for SunOS style shared libraries, expects that there is only
6157 one set of dynamic relocs. Any loadable section that was actually
6158 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6159 dynamic symbol table, is considered to be a dynamic reloc section. */
6162 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6166 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6170 if (elf_dynsymtab (abfd
) == 0)
6172 bfd_set_error (bfd_error_invalid_operation
);
6176 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6178 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6180 if ((s
->flags
& SEC_LOAD
) != 0
6181 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6182 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6183 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6188 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6190 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6192 for (i
= 0; i
< count
; i
++)
6203 /* Read in the version information. */
6206 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6208 bfd_byte
*contents
= NULL
;
6209 unsigned int freeidx
= 0;
6211 if (elf_dynverref (abfd
) != 0)
6213 Elf_Internal_Shdr
*hdr
;
6214 Elf_External_Verneed
*everneed
;
6215 Elf_Internal_Verneed
*iverneed
;
6217 bfd_byte
*contents_end
;
6219 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6221 elf_tdata (abfd
)->verref
= bfd_zalloc2 (abfd
, hdr
->sh_info
,
6222 sizeof (Elf_Internal_Verneed
));
6223 if (elf_tdata (abfd
)->verref
== NULL
)
6226 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6228 contents
= bfd_malloc (hdr
->sh_size
);
6229 if (contents
== NULL
)
6231 error_return_verref
:
6232 elf_tdata (abfd
)->verref
= NULL
;
6233 elf_tdata (abfd
)->cverrefs
= 0;
6236 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6237 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6238 goto error_return_verref
;
6240 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verneed
))
6241 goto error_return_verref
;
6243 BFD_ASSERT (sizeof (Elf_External_Verneed
)
6244 == sizeof (Elf_External_Vernaux
));
6245 contents_end
= contents
+ hdr
->sh_size
- sizeof (Elf_External_Verneed
);
6246 everneed
= (Elf_External_Verneed
*) contents
;
6247 iverneed
= elf_tdata (abfd
)->verref
;
6248 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6250 Elf_External_Vernaux
*evernaux
;
6251 Elf_Internal_Vernaux
*ivernaux
;
6254 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6256 iverneed
->vn_bfd
= abfd
;
6258 iverneed
->vn_filename
=
6259 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6261 if (iverneed
->vn_filename
== NULL
)
6262 goto error_return_verref
;
6264 if (iverneed
->vn_cnt
== 0)
6265 iverneed
->vn_auxptr
= NULL
;
6268 iverneed
->vn_auxptr
= bfd_alloc2 (abfd
, iverneed
->vn_cnt
,
6269 sizeof (Elf_Internal_Vernaux
));
6270 if (iverneed
->vn_auxptr
== NULL
)
6271 goto error_return_verref
;
6274 if (iverneed
->vn_aux
6275 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6276 goto error_return_verref
;
6278 evernaux
= ((Elf_External_Vernaux
*)
6279 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6280 ivernaux
= iverneed
->vn_auxptr
;
6281 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6283 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6285 ivernaux
->vna_nodename
=
6286 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6287 ivernaux
->vna_name
);
6288 if (ivernaux
->vna_nodename
== NULL
)
6289 goto error_return_verref
;
6291 if (j
+ 1 < iverneed
->vn_cnt
)
6292 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6294 ivernaux
->vna_nextptr
= NULL
;
6296 if (ivernaux
->vna_next
6297 > (size_t) (contents_end
- (bfd_byte
*) evernaux
))
6298 goto error_return_verref
;
6300 evernaux
= ((Elf_External_Vernaux
*)
6301 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6303 if (ivernaux
->vna_other
> freeidx
)
6304 freeidx
= ivernaux
->vna_other
;
6307 if (i
+ 1 < hdr
->sh_info
)
6308 iverneed
->vn_nextref
= iverneed
+ 1;
6310 iverneed
->vn_nextref
= NULL
;
6312 if (iverneed
->vn_next
6313 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6314 goto error_return_verref
;
6316 everneed
= ((Elf_External_Verneed
*)
6317 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6324 if (elf_dynverdef (abfd
) != 0)
6326 Elf_Internal_Shdr
*hdr
;
6327 Elf_External_Verdef
*everdef
;
6328 Elf_Internal_Verdef
*iverdef
;
6329 Elf_Internal_Verdef
*iverdefarr
;
6330 Elf_Internal_Verdef iverdefmem
;
6332 unsigned int maxidx
;
6333 bfd_byte
*contents_end_def
, *contents_end_aux
;
6335 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6337 contents
= bfd_malloc (hdr
->sh_size
);
6338 if (contents
== NULL
)
6340 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6341 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6344 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verdef
))
6347 BFD_ASSERT (sizeof (Elf_External_Verdef
)
6348 >= sizeof (Elf_External_Verdaux
));
6349 contents_end_def
= contents
+ hdr
->sh_size
6350 - sizeof (Elf_External_Verdef
);
6351 contents_end_aux
= contents
+ hdr
->sh_size
6352 - sizeof (Elf_External_Verdaux
);
6354 /* We know the number of entries in the section but not the maximum
6355 index. Therefore we have to run through all entries and find
6357 everdef
= (Elf_External_Verdef
*) contents
;
6359 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6361 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6363 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6364 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6366 if (iverdefmem
.vd_next
6367 > (size_t) (contents_end_def
- (bfd_byte
*) everdef
))
6370 everdef
= ((Elf_External_Verdef
*)
6371 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6374 if (default_imported_symver
)
6376 if (freeidx
> maxidx
)
6381 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, maxidx
,
6382 sizeof (Elf_Internal_Verdef
));
6383 if (elf_tdata (abfd
)->verdef
== NULL
)
6386 elf_tdata (abfd
)->cverdefs
= maxidx
;
6388 everdef
= (Elf_External_Verdef
*) contents
;
6389 iverdefarr
= elf_tdata (abfd
)->verdef
;
6390 for (i
= 0; i
< hdr
->sh_info
; i
++)
6392 Elf_External_Verdaux
*everdaux
;
6393 Elf_Internal_Verdaux
*iverdaux
;
6396 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6398 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) == 0)
6400 error_return_verdef
:
6401 elf_tdata (abfd
)->verdef
= NULL
;
6402 elf_tdata (abfd
)->cverdefs
= 0;
6406 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6407 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6409 iverdef
->vd_bfd
= abfd
;
6411 if (iverdef
->vd_cnt
== 0)
6412 iverdef
->vd_auxptr
= NULL
;
6415 iverdef
->vd_auxptr
= bfd_alloc2 (abfd
, iverdef
->vd_cnt
,
6416 sizeof (Elf_Internal_Verdaux
));
6417 if (iverdef
->vd_auxptr
== NULL
)
6418 goto error_return_verdef
;
6422 > (size_t) (contents_end_aux
- (bfd_byte
*) everdef
))
6423 goto error_return_verdef
;
6425 everdaux
= ((Elf_External_Verdaux
*)
6426 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6427 iverdaux
= iverdef
->vd_auxptr
;
6428 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6430 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6432 iverdaux
->vda_nodename
=
6433 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6434 iverdaux
->vda_name
);
6435 if (iverdaux
->vda_nodename
== NULL
)
6436 goto error_return_verdef
;
6438 if (j
+ 1 < iverdef
->vd_cnt
)
6439 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6441 iverdaux
->vda_nextptr
= NULL
;
6443 if (iverdaux
->vda_next
6444 > (size_t) (contents_end_aux
- (bfd_byte
*) everdaux
))
6445 goto error_return_verdef
;
6447 everdaux
= ((Elf_External_Verdaux
*)
6448 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6451 if (iverdef
->vd_cnt
)
6452 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6454 if ((size_t) (iverdef
- iverdefarr
) + 1 < maxidx
)
6455 iverdef
->vd_nextdef
= iverdef
+ 1;
6457 iverdef
->vd_nextdef
= NULL
;
6459 everdef
= ((Elf_External_Verdef
*)
6460 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6466 else if (default_imported_symver
)
6473 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, freeidx
,
6474 sizeof (Elf_Internal_Verdef
));
6475 if (elf_tdata (abfd
)->verdef
== NULL
)
6478 elf_tdata (abfd
)->cverdefs
= freeidx
;
6481 /* Create a default version based on the soname. */
6482 if (default_imported_symver
)
6484 Elf_Internal_Verdef
*iverdef
;
6485 Elf_Internal_Verdaux
*iverdaux
;
6487 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6489 iverdef
->vd_version
= VER_DEF_CURRENT
;
6490 iverdef
->vd_flags
= 0;
6491 iverdef
->vd_ndx
= freeidx
;
6492 iverdef
->vd_cnt
= 1;
6494 iverdef
->vd_bfd
= abfd
;
6496 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6497 if (iverdef
->vd_nodename
== NULL
)
6498 goto error_return_verdef
;
6499 iverdef
->vd_nextdef
= NULL
;
6500 iverdef
->vd_auxptr
= bfd_alloc (abfd
, sizeof (Elf_Internal_Verdaux
));
6501 if (iverdef
->vd_auxptr
== NULL
)
6502 goto error_return_verdef
;
6504 iverdaux
= iverdef
->vd_auxptr
;
6505 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6506 iverdaux
->vda_nextptr
= NULL
;
6512 if (contents
!= NULL
)
6518 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6520 elf_symbol_type
*newsym
;
6521 bfd_size_type amt
= sizeof (elf_symbol_type
);
6523 newsym
= bfd_zalloc (abfd
, amt
);
6528 newsym
->symbol
.the_bfd
= abfd
;
6529 return &newsym
->symbol
;
6534 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6538 bfd_symbol_info (symbol
, ret
);
6541 /* Return whether a symbol name implies a local symbol. Most targets
6542 use this function for the is_local_label_name entry point, but some
6546 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6549 /* Normal local symbols start with ``.L''. */
6550 if (name
[0] == '.' && name
[1] == 'L')
6553 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6554 DWARF debugging symbols starting with ``..''. */
6555 if (name
[0] == '.' && name
[1] == '.')
6558 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6559 emitting DWARF debugging output. I suspect this is actually a
6560 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6561 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6562 underscore to be emitted on some ELF targets). For ease of use,
6563 we treat such symbols as local. */
6564 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6571 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6572 asymbol
*symbol ATTRIBUTE_UNUSED
)
6579 _bfd_elf_set_arch_mach (bfd
*abfd
,
6580 enum bfd_architecture arch
,
6581 unsigned long machine
)
6583 /* If this isn't the right architecture for this backend, and this
6584 isn't the generic backend, fail. */
6585 if (arch
!= get_elf_backend_data (abfd
)->arch
6586 && arch
!= bfd_arch_unknown
6587 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6590 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6593 /* Find the function to a particular section and offset,
6594 for error reporting. */
6597 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6601 const char **filename_ptr
,
6602 const char **functionname_ptr
)
6604 const char *filename
;
6605 asymbol
*func
, *file
;
6608 /* ??? Given multiple file symbols, it is impossible to reliably
6609 choose the right file name for global symbols. File symbols are
6610 local symbols, and thus all file symbols must sort before any
6611 global symbols. The ELF spec may be interpreted to say that a
6612 file symbol must sort before other local symbols, but currently
6613 ld -r doesn't do this. So, for ld -r output, it is possible to
6614 make a better choice of file name for local symbols by ignoring
6615 file symbols appearing after a given local symbol. */
6616 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6622 state
= nothing_seen
;
6624 for (p
= symbols
; *p
!= NULL
; p
++)
6628 q
= (elf_symbol_type
*) *p
;
6630 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6636 if (state
== symbol_seen
)
6637 state
= file_after_symbol_seen
;
6643 if (bfd_get_section (&q
->symbol
) == section
6644 && q
->symbol
.value
>= low_func
6645 && q
->symbol
.value
<= offset
)
6647 func
= (asymbol
*) q
;
6648 low_func
= q
->symbol
.value
;
6651 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6652 && state
== file_after_symbol_seen
)
6655 filename
= bfd_asymbol_name (file
);
6659 if (state
== nothing_seen
)
6660 state
= symbol_seen
;
6667 *filename_ptr
= filename
;
6668 if (functionname_ptr
)
6669 *functionname_ptr
= bfd_asymbol_name (func
);
6674 /* Find the nearest line to a particular section and offset,
6675 for error reporting. */
6678 _bfd_elf_find_nearest_line (bfd
*abfd
,
6682 const char **filename_ptr
,
6683 const char **functionname_ptr
,
6684 unsigned int *line_ptr
)
6688 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6689 filename_ptr
, functionname_ptr
,
6692 if (!*functionname_ptr
)
6693 elf_find_function (abfd
, section
, symbols
, offset
,
6694 *filename_ptr
? NULL
: filename_ptr
,
6700 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6701 filename_ptr
, functionname_ptr
,
6703 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6705 if (!*functionname_ptr
)
6706 elf_find_function (abfd
, section
, symbols
, offset
,
6707 *filename_ptr
? NULL
: filename_ptr
,
6713 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6714 &found
, filename_ptr
,
6715 functionname_ptr
, line_ptr
,
6716 &elf_tdata (abfd
)->line_info
))
6718 if (found
&& (*functionname_ptr
|| *line_ptr
))
6721 if (symbols
== NULL
)
6724 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6725 filename_ptr
, functionname_ptr
))
6732 /* Find the line for a symbol. */
6735 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6736 const char **filename_ptr
, unsigned int *line_ptr
)
6738 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6739 filename_ptr
, line_ptr
, 0,
6740 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6743 /* After a call to bfd_find_nearest_line, successive calls to
6744 bfd_find_inliner_info can be used to get source information about
6745 each level of function inlining that terminated at the address
6746 passed to bfd_find_nearest_line. Currently this is only supported
6747 for DWARF2 with appropriate DWARF3 extensions. */
6750 _bfd_elf_find_inliner_info (bfd
*abfd
,
6751 const char **filename_ptr
,
6752 const char **functionname_ptr
,
6753 unsigned int *line_ptr
)
6756 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6757 functionname_ptr
, line_ptr
,
6758 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6763 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6767 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6769 ret
+= get_program_header_size (abfd
);
6774 _bfd_elf_set_section_contents (bfd
*abfd
,
6776 const void *location
,
6778 bfd_size_type count
)
6780 Elf_Internal_Shdr
*hdr
;
6783 if (! abfd
->output_has_begun
6784 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6787 hdr
= &elf_section_data (section
)->this_hdr
;
6788 pos
= hdr
->sh_offset
+ offset
;
6789 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6790 || bfd_bwrite (location
, count
, abfd
) != count
)
6797 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6798 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6799 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6804 /* Try to convert a non-ELF reloc into an ELF one. */
6807 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6809 /* Check whether we really have an ELF howto. */
6811 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6813 bfd_reloc_code_real_type code
;
6814 reloc_howto_type
*howto
;
6816 /* Alien reloc: Try to determine its type to replace it with an
6817 equivalent ELF reloc. */
6819 if (areloc
->howto
->pc_relative
)
6821 switch (areloc
->howto
->bitsize
)
6824 code
= BFD_RELOC_8_PCREL
;
6827 code
= BFD_RELOC_12_PCREL
;
6830 code
= BFD_RELOC_16_PCREL
;
6833 code
= BFD_RELOC_24_PCREL
;
6836 code
= BFD_RELOC_32_PCREL
;
6839 code
= BFD_RELOC_64_PCREL
;
6845 howto
= bfd_reloc_type_lookup (abfd
, code
);
6847 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6849 if (howto
->pcrel_offset
)
6850 areloc
->addend
+= areloc
->address
;
6852 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6857 switch (areloc
->howto
->bitsize
)
6863 code
= BFD_RELOC_14
;
6866 code
= BFD_RELOC_16
;
6869 code
= BFD_RELOC_26
;
6872 code
= BFD_RELOC_32
;
6875 code
= BFD_RELOC_64
;
6881 howto
= bfd_reloc_type_lookup (abfd
, code
);
6885 areloc
->howto
= howto
;
6893 (*_bfd_error_handler
)
6894 (_("%B: unsupported relocation type %s"),
6895 abfd
, areloc
->howto
->name
);
6896 bfd_set_error (bfd_error_bad_value
);
6901 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6903 if (bfd_get_format (abfd
) == bfd_object
)
6905 if (elf_shstrtab (abfd
) != NULL
)
6906 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6907 _bfd_dwarf2_cleanup_debug_info (abfd
);
6910 return _bfd_generic_close_and_cleanup (abfd
);
6913 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6914 in the relocation's offset. Thus we cannot allow any sort of sanity
6915 range-checking to interfere. There is nothing else to do in processing
6918 bfd_reloc_status_type
6919 _bfd_elf_rel_vtable_reloc_fn
6920 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6921 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6922 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6923 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6925 return bfd_reloc_ok
;
6928 /* Elf core file support. Much of this only works on native
6929 toolchains, since we rely on knowing the
6930 machine-dependent procfs structure in order to pick
6931 out details about the corefile. */
6933 #ifdef HAVE_SYS_PROCFS_H
6934 # include <sys/procfs.h>
6937 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6940 elfcore_make_pid (bfd
*abfd
)
6942 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6943 + (elf_tdata (abfd
)->core_pid
));
6946 /* If there isn't a section called NAME, make one, using
6947 data from SECT. Note, this function will generate a
6948 reference to NAME, so you shouldn't deallocate or
6952 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6956 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6959 sect2
= bfd_make_section (abfd
, name
);
6963 sect2
->size
= sect
->size
;
6964 sect2
->filepos
= sect
->filepos
;
6965 sect2
->flags
= sect
->flags
;
6966 sect2
->alignment_power
= sect
->alignment_power
;
6970 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6971 actually creates up to two pseudosections:
6972 - For the single-threaded case, a section named NAME, unless
6973 such a section already exists.
6974 - For the multi-threaded case, a section named "NAME/PID", where
6975 PID is elfcore_make_pid (abfd).
6976 Both pseudosections have identical contents. */
6978 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6984 char *threaded_name
;
6988 /* Build the section name. */
6990 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6991 len
= strlen (buf
) + 1;
6992 threaded_name
= bfd_alloc (abfd
, len
);
6993 if (threaded_name
== NULL
)
6995 memcpy (threaded_name
, buf
, len
);
6997 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
7001 sect
->filepos
= filepos
;
7002 sect
->flags
= SEC_HAS_CONTENTS
;
7003 sect
->alignment_power
= 2;
7005 return elfcore_maybe_make_sect (abfd
, name
, sect
);
7008 /* prstatus_t exists on:
7010 linux 2.[01] + glibc
7014 #if defined (HAVE_PRSTATUS_T)
7017 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7022 if (note
->descsz
== sizeof (prstatus_t
))
7026 size
= sizeof (prstat
.pr_reg
);
7027 offset
= offsetof (prstatus_t
, pr_reg
);
7028 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7030 /* Do not overwrite the core signal if it
7031 has already been set by another thread. */
7032 if (elf_tdata (abfd
)->core_signal
== 0)
7033 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7034 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7036 /* pr_who exists on:
7039 pr_who doesn't exist on:
7042 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7043 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7046 #if defined (HAVE_PRSTATUS32_T)
7047 else if (note
->descsz
== sizeof (prstatus32_t
))
7049 /* 64-bit host, 32-bit corefile */
7050 prstatus32_t prstat
;
7052 size
= sizeof (prstat
.pr_reg
);
7053 offset
= offsetof (prstatus32_t
, pr_reg
);
7054 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7056 /* Do not overwrite the core signal if it
7057 has already been set by another thread. */
7058 if (elf_tdata (abfd
)->core_signal
== 0)
7059 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7060 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7062 /* pr_who exists on:
7065 pr_who doesn't exist on:
7068 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7069 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7072 #endif /* HAVE_PRSTATUS32_T */
7075 /* Fail - we don't know how to handle any other
7076 note size (ie. data object type). */
7080 /* Make a ".reg/999" section and a ".reg" section. */
7081 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7082 size
, note
->descpos
+ offset
);
7084 #endif /* defined (HAVE_PRSTATUS_T) */
7086 /* Create a pseudosection containing the exact contents of NOTE. */
7088 elfcore_make_note_pseudosection (bfd
*abfd
,
7090 Elf_Internal_Note
*note
)
7092 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7093 note
->descsz
, note
->descpos
);
7096 /* There isn't a consistent prfpregset_t across platforms,
7097 but it doesn't matter, because we don't have to pick this
7098 data structure apart. */
7101 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7103 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7106 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7107 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7111 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7113 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7116 #if defined (HAVE_PRPSINFO_T)
7117 typedef prpsinfo_t elfcore_psinfo_t
;
7118 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7119 typedef prpsinfo32_t elfcore_psinfo32_t
;
7123 #if defined (HAVE_PSINFO_T)
7124 typedef psinfo_t elfcore_psinfo_t
;
7125 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7126 typedef psinfo32_t elfcore_psinfo32_t
;
7130 /* return a malloc'ed copy of a string at START which is at
7131 most MAX bytes long, possibly without a terminating '\0'.
7132 the copy will always have a terminating '\0'. */
7135 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7138 char *end
= memchr (start
, '\0', max
);
7146 dups
= bfd_alloc (abfd
, len
+ 1);
7150 memcpy (dups
, start
, len
);
7156 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7158 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7160 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7162 elfcore_psinfo_t psinfo
;
7164 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7166 elf_tdata (abfd
)->core_program
7167 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7168 sizeof (psinfo
.pr_fname
));
7170 elf_tdata (abfd
)->core_command
7171 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7172 sizeof (psinfo
.pr_psargs
));
7174 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7175 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7177 /* 64-bit host, 32-bit corefile */
7178 elfcore_psinfo32_t psinfo
;
7180 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7182 elf_tdata (abfd
)->core_program
7183 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7184 sizeof (psinfo
.pr_fname
));
7186 elf_tdata (abfd
)->core_command
7187 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7188 sizeof (psinfo
.pr_psargs
));
7194 /* Fail - we don't know how to handle any other
7195 note size (ie. data object type). */
7199 /* Note that for some reason, a spurious space is tacked
7200 onto the end of the args in some (at least one anyway)
7201 implementations, so strip it off if it exists. */
7204 char *command
= elf_tdata (abfd
)->core_command
;
7205 int n
= strlen (command
);
7207 if (0 < n
&& command
[n
- 1] == ' ')
7208 command
[n
- 1] = '\0';
7213 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7215 #if defined (HAVE_PSTATUS_T)
7217 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7219 if (note
->descsz
== sizeof (pstatus_t
)
7220 #if defined (HAVE_PXSTATUS_T)
7221 || note
->descsz
== sizeof (pxstatus_t
)
7227 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7229 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7231 #if defined (HAVE_PSTATUS32_T)
7232 else if (note
->descsz
== sizeof (pstatus32_t
))
7234 /* 64-bit host, 32-bit corefile */
7237 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7239 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7242 /* Could grab some more details from the "representative"
7243 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7244 NT_LWPSTATUS note, presumably. */
7248 #endif /* defined (HAVE_PSTATUS_T) */
7250 #if defined (HAVE_LWPSTATUS_T)
7252 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7254 lwpstatus_t lwpstat
;
7260 if (note
->descsz
!= sizeof (lwpstat
)
7261 #if defined (HAVE_LWPXSTATUS_T)
7262 && note
->descsz
!= sizeof (lwpxstatus_t
)
7267 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7269 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7270 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7272 /* Make a ".reg/999" section. */
7274 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7275 len
= strlen (buf
) + 1;
7276 name
= bfd_alloc (abfd
, len
);
7279 memcpy (name
, buf
, len
);
7281 sect
= bfd_make_section_anyway (abfd
, name
);
7285 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7286 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7287 sect
->filepos
= note
->descpos
7288 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7291 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7292 sect
->size
= sizeof (lwpstat
.pr_reg
);
7293 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7296 sect
->flags
= SEC_HAS_CONTENTS
;
7297 sect
->alignment_power
= 2;
7299 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7302 /* Make a ".reg2/999" section */
7304 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7305 len
= strlen (buf
) + 1;
7306 name
= bfd_alloc (abfd
, len
);
7309 memcpy (name
, buf
, len
);
7311 sect
= bfd_make_section_anyway (abfd
, name
);
7315 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7316 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7317 sect
->filepos
= note
->descpos
7318 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7321 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7322 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7323 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7326 sect
->flags
= SEC_HAS_CONTENTS
;
7327 sect
->alignment_power
= 2;
7329 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7331 #endif /* defined (HAVE_LWPSTATUS_T) */
7333 #if defined (HAVE_WIN32_PSTATUS_T)
7335 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7341 win32_pstatus_t pstatus
;
7343 if (note
->descsz
< sizeof (pstatus
))
7346 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7348 switch (pstatus
.data_type
)
7350 case NOTE_INFO_PROCESS
:
7351 /* FIXME: need to add ->core_command. */
7352 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7353 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7356 case NOTE_INFO_THREAD
:
7357 /* Make a ".reg/999" section. */
7358 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7360 len
= strlen (buf
) + 1;
7361 name
= bfd_alloc (abfd
, len
);
7365 memcpy (name
, buf
, len
);
7367 sect
= bfd_make_section_anyway (abfd
, name
);
7371 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7372 sect
->filepos
= (note
->descpos
7373 + offsetof (struct win32_pstatus
,
7374 data
.thread_info
.thread_context
));
7375 sect
->flags
= SEC_HAS_CONTENTS
;
7376 sect
->alignment_power
= 2;
7378 if (pstatus
.data
.thread_info
.is_active_thread
)
7379 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7383 case NOTE_INFO_MODULE
:
7384 /* Make a ".module/xxxxxxxx" section. */
7385 sprintf (buf
, ".module/%08lx",
7386 (long) pstatus
.data
.module_info
.base_address
);
7388 len
= strlen (buf
) + 1;
7389 name
= bfd_alloc (abfd
, len
);
7393 memcpy (name
, buf
, len
);
7395 sect
= bfd_make_section_anyway (abfd
, name
);
7400 sect
->size
= note
->descsz
;
7401 sect
->filepos
= note
->descpos
;
7402 sect
->flags
= SEC_HAS_CONTENTS
;
7403 sect
->alignment_power
= 2;
7412 #endif /* HAVE_WIN32_PSTATUS_T */
7415 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7417 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7425 if (bed
->elf_backend_grok_prstatus
)
7426 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7428 #if defined (HAVE_PRSTATUS_T)
7429 return elfcore_grok_prstatus (abfd
, note
);
7434 #if defined (HAVE_PSTATUS_T)
7436 return elfcore_grok_pstatus (abfd
, note
);
7439 #if defined (HAVE_LWPSTATUS_T)
7441 return elfcore_grok_lwpstatus (abfd
, note
);
7444 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7445 return elfcore_grok_prfpreg (abfd
, note
);
7447 #if defined (HAVE_WIN32_PSTATUS_T)
7448 case NT_WIN32PSTATUS
:
7449 return elfcore_grok_win32pstatus (abfd
, note
);
7452 case NT_PRXFPREG
: /* Linux SSE extension */
7453 if (note
->namesz
== 6
7454 && strcmp (note
->namedata
, "LINUX") == 0)
7455 return elfcore_grok_prxfpreg (abfd
, note
);
7461 if (bed
->elf_backend_grok_psinfo
)
7462 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7464 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7465 return elfcore_grok_psinfo (abfd
, note
);
7472 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7476 sect
->size
= note
->descsz
;
7477 sect
->filepos
= note
->descpos
;
7478 sect
->flags
= SEC_HAS_CONTENTS
;
7479 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7487 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7491 cp
= strchr (note
->namedata
, '@');
7494 *lwpidp
= atoi(cp
+ 1);
7501 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7504 /* Signal number at offset 0x08. */
7505 elf_tdata (abfd
)->core_signal
7506 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7508 /* Process ID at offset 0x50. */
7509 elf_tdata (abfd
)->core_pid
7510 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7512 /* Command name at 0x7c (max 32 bytes, including nul). */
7513 elf_tdata (abfd
)->core_command
7514 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7516 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7521 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7525 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7526 elf_tdata (abfd
)->core_lwpid
= lwp
;
7528 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7530 /* NetBSD-specific core "procinfo". Note that we expect to
7531 find this note before any of the others, which is fine,
7532 since the kernel writes this note out first when it
7533 creates a core file. */
7535 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7538 /* As of Jan 2002 there are no other machine-independent notes
7539 defined for NetBSD core files. If the note type is less
7540 than the start of the machine-dependent note types, we don't
7543 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7547 switch (bfd_get_arch (abfd
))
7549 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7550 PT_GETFPREGS == mach+2. */
7552 case bfd_arch_alpha
:
7553 case bfd_arch_sparc
:
7556 case NT_NETBSDCORE_FIRSTMACH
+0:
7557 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7559 case NT_NETBSDCORE_FIRSTMACH
+2:
7560 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7566 /* On all other arch's, PT_GETREGS == mach+1 and
7567 PT_GETFPREGS == mach+3. */
7572 case NT_NETBSDCORE_FIRSTMACH
+1:
7573 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7575 case NT_NETBSDCORE_FIRSTMACH
+3:
7576 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7586 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7588 void *ddata
= note
->descdata
;
7595 /* nto_procfs_status 'pid' field is at offset 0. */
7596 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7598 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7599 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7601 /* nto_procfs_status 'flags' field is at offset 8. */
7602 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7604 /* nto_procfs_status 'what' field is at offset 14. */
7605 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7607 elf_tdata (abfd
)->core_signal
= sig
;
7608 elf_tdata (abfd
)->core_lwpid
= *tid
;
7611 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7612 do not come from signals so we make sure we set the current
7613 thread just in case. */
7614 if (flags
& 0x00000080)
7615 elf_tdata (abfd
)->core_lwpid
= *tid
;
7617 /* Make a ".qnx_core_status/%d" section. */
7618 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7620 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7625 sect
= bfd_make_section_anyway (abfd
, name
);
7629 sect
->size
= note
->descsz
;
7630 sect
->filepos
= note
->descpos
;
7631 sect
->flags
= SEC_HAS_CONTENTS
;
7632 sect
->alignment_power
= 2;
7634 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7638 elfcore_grok_nto_regs (bfd
*abfd
,
7639 Elf_Internal_Note
*note
,
7647 /* Make a "(base)/%d" section. */
7648 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7650 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7655 sect
= bfd_make_section_anyway (abfd
, name
);
7659 sect
->size
= note
->descsz
;
7660 sect
->filepos
= note
->descpos
;
7661 sect
->flags
= SEC_HAS_CONTENTS
;
7662 sect
->alignment_power
= 2;
7664 /* This is the current thread. */
7665 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7666 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7671 #define BFD_QNT_CORE_INFO 7
7672 #define BFD_QNT_CORE_STATUS 8
7673 #define BFD_QNT_CORE_GREG 9
7674 #define BFD_QNT_CORE_FPREG 10
7677 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7679 /* Every GREG section has a STATUS section before it. Store the
7680 tid from the previous call to pass down to the next gregs
7682 static pid_t tid
= 1;
7686 case BFD_QNT_CORE_INFO
:
7687 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7688 case BFD_QNT_CORE_STATUS
:
7689 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7690 case BFD_QNT_CORE_GREG
:
7691 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7692 case BFD_QNT_CORE_FPREG
:
7693 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7699 /* Function: elfcore_write_note
7706 size of data for note
7709 End of buffer containing note. */
7712 elfcore_write_note (bfd
*abfd
,
7720 Elf_External_Note
*xnp
;
7730 const struct elf_backend_data
*bed
;
7732 namesz
= strlen (name
) + 1;
7733 bed
= get_elf_backend_data (abfd
);
7734 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7737 newspace
= 12 + namesz
+ pad
+ size
;
7739 p
= realloc (buf
, *bufsiz
+ newspace
);
7741 *bufsiz
+= newspace
;
7742 xnp
= (Elf_External_Note
*) dest
;
7743 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7744 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7745 H_PUT_32 (abfd
, type
, xnp
->type
);
7749 memcpy (dest
, name
, namesz
);
7757 memcpy (dest
, input
, size
);
7761 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7763 elfcore_write_prpsinfo (bfd
*abfd
,
7770 char *note_name
= "CORE";
7772 #if defined (HAVE_PSINFO_T)
7774 note_type
= NT_PSINFO
;
7777 note_type
= NT_PRPSINFO
;
7780 memset (&data
, 0, sizeof (data
));
7781 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7782 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7783 return elfcore_write_note (abfd
, buf
, bufsiz
,
7784 note_name
, note_type
, &data
, sizeof (data
));
7786 #endif /* PSINFO_T or PRPSINFO_T */
7788 #if defined (HAVE_PRSTATUS_T)
7790 elfcore_write_prstatus (bfd
*abfd
,
7798 char *note_name
= "CORE";
7800 memset (&prstat
, 0, sizeof (prstat
));
7801 prstat
.pr_pid
= pid
;
7802 prstat
.pr_cursig
= cursig
;
7803 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7804 return elfcore_write_note (abfd
, buf
, bufsiz
,
7805 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7807 #endif /* HAVE_PRSTATUS_T */
7809 #if defined (HAVE_LWPSTATUS_T)
7811 elfcore_write_lwpstatus (bfd
*abfd
,
7818 lwpstatus_t lwpstat
;
7819 char *note_name
= "CORE";
7821 memset (&lwpstat
, 0, sizeof (lwpstat
));
7822 lwpstat
.pr_lwpid
= pid
>> 16;
7823 lwpstat
.pr_cursig
= cursig
;
7824 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7825 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7826 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7828 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7829 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7831 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7832 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7835 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7836 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7838 #endif /* HAVE_LWPSTATUS_T */
7840 #if defined (HAVE_PSTATUS_T)
7842 elfcore_write_pstatus (bfd
*abfd
,
7850 char *note_name
= "CORE";
7852 memset (&pstat
, 0, sizeof (pstat
));
7853 pstat
.pr_pid
= pid
& 0xffff;
7854 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7855 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7858 #endif /* HAVE_PSTATUS_T */
7861 elfcore_write_prfpreg (bfd
*abfd
,
7867 char *note_name
= "CORE";
7868 return elfcore_write_note (abfd
, buf
, bufsiz
,
7869 note_name
, NT_FPREGSET
, fpregs
, size
);
7873 elfcore_write_prxfpreg (bfd
*abfd
,
7876 const void *xfpregs
,
7879 char *note_name
= "LINUX";
7880 return elfcore_write_note (abfd
, buf
, bufsiz
,
7881 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7885 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7893 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7896 buf
= bfd_malloc (size
);
7900 if (bfd_bread (buf
, size
, abfd
) != size
)
7908 while (p
< buf
+ size
)
7910 /* FIXME: bad alignment assumption. */
7911 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7912 Elf_Internal_Note in
;
7914 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7916 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7917 in
.namedata
= xnp
->name
;
7919 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7920 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7921 in
.descpos
= offset
+ (in
.descdata
- buf
);
7923 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7925 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7928 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7930 if (! elfcore_grok_nto_note (abfd
, &in
))
7935 if (! elfcore_grok_note (abfd
, &in
))
7939 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7946 /* Providing external access to the ELF program header table. */
7948 /* Return an upper bound on the number of bytes required to store a
7949 copy of ABFD's program header table entries. Return -1 if an error
7950 occurs; bfd_get_error will return an appropriate code. */
7953 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7955 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7957 bfd_set_error (bfd_error_wrong_format
);
7961 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7964 /* Copy ABFD's program header table entries to *PHDRS. The entries
7965 will be stored as an array of Elf_Internal_Phdr structures, as
7966 defined in include/elf/internal.h. To find out how large the
7967 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7969 Return the number of program header table entries read, or -1 if an
7970 error occurs; bfd_get_error will return an appropriate code. */
7973 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7977 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7979 bfd_set_error (bfd_error_wrong_format
);
7983 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7984 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7985 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7991 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7994 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7996 i_ehdrp
= elf_elfheader (abfd
);
7997 if (i_ehdrp
== NULL
)
7998 sprintf_vma (buf
, value
);
8001 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8003 #if BFD_HOST_64BIT_LONG
8004 sprintf (buf
, "%016lx", value
);
8006 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
8007 _bfd_int64_low (value
));
8011 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
8014 sprintf_vma (buf
, value
);
8019 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
8022 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8024 i_ehdrp
= elf_elfheader (abfd
);
8025 if (i_ehdrp
== NULL
)
8026 fprintf_vma ((FILE *) stream
, value
);
8029 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8031 #if BFD_HOST_64BIT_LONG
8032 fprintf ((FILE *) stream
, "%016lx", value
);
8034 fprintf ((FILE *) stream
, "%08lx%08lx",
8035 _bfd_int64_high (value
), _bfd_int64_low (value
));
8039 fprintf ((FILE *) stream
, "%08lx",
8040 (unsigned long) (value
& 0xffffffff));
8043 fprintf_vma ((FILE *) stream
, value
);
8047 enum elf_reloc_type_class
8048 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8050 return reloc_class_normal
;
8053 /* For RELA architectures, return the relocation value for a
8054 relocation against a local symbol. */
8057 _bfd_elf_rela_local_sym (bfd
*abfd
,
8058 Elf_Internal_Sym
*sym
,
8060 Elf_Internal_Rela
*rel
)
8062 asection
*sec
= *psec
;
8065 relocation
= (sec
->output_section
->vma
8066 + sec
->output_offset
8068 if ((sec
->flags
& SEC_MERGE
)
8069 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8070 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8073 _bfd_merged_section_offset (abfd
, psec
,
8074 elf_section_data (sec
)->sec_info
,
8075 sym
->st_value
+ rel
->r_addend
);
8078 /* If we have changed the section, and our original section is
8079 marked with SEC_EXCLUDE, it means that the original
8080 SEC_MERGE section has been completely subsumed in some
8081 other SEC_MERGE section. In this case, we need to leave
8082 some info around for --emit-relocs. */
8083 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8084 sec
->kept_section
= *psec
;
8087 rel
->r_addend
-= relocation
;
8088 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8094 _bfd_elf_rel_local_sym (bfd
*abfd
,
8095 Elf_Internal_Sym
*sym
,
8099 asection
*sec
= *psec
;
8101 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8102 return sym
->st_value
+ addend
;
8104 return _bfd_merged_section_offset (abfd
, psec
,
8105 elf_section_data (sec
)->sec_info
,
8106 sym
->st_value
+ addend
);
8110 _bfd_elf_section_offset (bfd
*abfd
,
8111 struct bfd_link_info
*info
,
8115 switch (sec
->sec_info_type
)
8117 case ELF_INFO_TYPE_STABS
:
8118 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8120 case ELF_INFO_TYPE_EH_FRAME
:
8121 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8127 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8128 reconstruct an ELF file by reading the segments out of remote memory
8129 based on the ELF file header at EHDR_VMA and the ELF program headers it
8130 points to. If not null, *LOADBASEP is filled in with the difference
8131 between the VMAs from which the segments were read, and the VMAs the
8132 file headers (and hence BFD's idea of each section's VMA) put them at.
8134 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8135 remote memory at target address VMA into the local buffer at MYADDR; it
8136 should return zero on success or an `errno' code on failure. TEMPL must
8137 be a BFD for an ELF target with the word size and byte order found in
8138 the remote memory. */
8141 bfd_elf_bfd_from_remote_memory
8145 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8147 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8148 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8152 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8153 long symcount ATTRIBUTE_UNUSED
,
8154 asymbol
**syms ATTRIBUTE_UNUSED
,
8159 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8162 const char *relplt_name
;
8163 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8167 Elf_Internal_Shdr
*hdr
;
8173 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8176 if (dynsymcount
<= 0)
8179 if (!bed
->plt_sym_val
)
8182 relplt_name
= bed
->relplt_name
;
8183 if (relplt_name
== NULL
)
8184 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8185 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8189 hdr
= &elf_section_data (relplt
)->this_hdr
;
8190 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8191 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8194 plt
= bfd_get_section_by_name (abfd
, ".plt");
8198 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8199 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8202 count
= relplt
->size
/ hdr
->sh_entsize
;
8203 size
= count
* sizeof (asymbol
);
8204 p
= relplt
->relocation
;
8205 for (i
= 0; i
< count
; i
++, s
++, p
++)
8206 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8208 s
= *ret
= bfd_malloc (size
);
8212 names
= (char *) (s
+ count
);
8213 p
= relplt
->relocation
;
8215 for (i
= 0; i
< count
; i
++, s
++, p
++)
8220 addr
= bed
->plt_sym_val (i
, plt
, p
);
8221 if (addr
== (bfd_vma
) -1)
8224 *s
= **p
->sym_ptr_ptr
;
8226 s
->value
= addr
- plt
->vma
;
8228 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8229 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8231 memcpy (names
, "@plt", sizeof ("@plt"));
8232 names
+= sizeof ("@plt");
8239 /* Sort symbol by binding and section. We want to put definitions
8240 sorted by section at the beginning. */
8243 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8245 const Elf_Internal_Sym
*s1
;
8246 const Elf_Internal_Sym
*s2
;
8249 /* Make sure that undefined symbols are at the end. */
8250 s1
= (const Elf_Internal_Sym
*) arg1
;
8251 if (s1
->st_shndx
== SHN_UNDEF
)
8253 s2
= (const Elf_Internal_Sym
*) arg2
;
8254 if (s2
->st_shndx
== SHN_UNDEF
)
8257 /* Sorted by section index. */
8258 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8262 /* Sorted by binding. */
8263 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8268 Elf_Internal_Sym
*sym
;
8273 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8275 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8276 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8277 return strcmp (s1
->name
, s2
->name
);
8280 /* Check if 2 sections define the same set of local and global
8284 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8287 const struct elf_backend_data
*bed1
, *bed2
;
8288 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8289 bfd_size_type symcount1
, symcount2
;
8290 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8291 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8292 Elf_Internal_Sym
*isymend
;
8293 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8294 bfd_size_type count1
, count2
, i
;
8301 /* If both are .gnu.linkonce sections, they have to have the same
8303 if (strncmp (sec1
->name
, ".gnu.linkonce",
8304 sizeof ".gnu.linkonce" - 1) == 0
8305 && strncmp (sec2
->name
, ".gnu.linkonce",
8306 sizeof ".gnu.linkonce" - 1) == 0)
8307 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8308 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8310 /* Both sections have to be in ELF. */
8311 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8312 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8315 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8318 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8319 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8321 /* If both are members of section groups, they have to have the
8323 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8327 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8328 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8329 if (shndx1
== -1 || shndx2
== -1)
8332 bed1
= get_elf_backend_data (bfd1
);
8333 bed2
= get_elf_backend_data (bfd2
);
8334 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8335 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8336 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8337 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8339 if (symcount1
== 0 || symcount2
== 0)
8342 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8344 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8348 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8351 /* Sort symbols by binding and section. Global definitions are at
8353 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8354 elf_sort_elf_symbol
);
8355 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8356 elf_sort_elf_symbol
);
8358 /* Count definitions in the section. */
8360 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8361 isym
< isymend
; isym
++)
8363 if (isym
->st_shndx
== (unsigned int) shndx1
)
8370 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8375 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8376 isym
< isymend
; isym
++)
8378 if (isym
->st_shndx
== (unsigned int) shndx2
)
8385 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8389 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8392 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8393 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8395 if (symtable1
== NULL
|| symtable2
== NULL
)
8399 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8400 isym
< isymend
; isym
++)
8403 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8410 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8411 isym
< isymend
; isym
++)
8414 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8420 /* Sort symbol by name. */
8421 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8422 elf_sym_name_compare
);
8423 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8424 elf_sym_name_compare
);
8426 for (i
= 0; i
< count1
; i
++)
8427 /* Two symbols must have the same binding, type and name. */
8428 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8429 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8430 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)