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_sections (bfd
*abfd
)
632 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
633 bfd_boolean result
= TRUE
;
636 /* Process SHF_LINK_ORDER. */
637 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
639 Elf_Internal_Shdr
*this_hdr
= &elf_section_data (s
)->this_hdr
;
640 if ((this_hdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
642 unsigned int elfsec
= this_hdr
->sh_link
;
643 /* FIXME: The old Intel compiler and old strip/objcopy may
644 not set the sh_link or sh_info fields. Hence we could
645 get the situation where elfsec is 0. */
648 const struct elf_backend_data
*bed
649 = get_elf_backend_data (abfd
);
650 if (bed
->link_order_error_handler
)
651 bed
->link_order_error_handler
652 (_("%B: warning: sh_link not set for section `%A'"),
657 this_hdr
= elf_elfsections (abfd
)[elfsec
];
658 elf_linked_to_section (s
) = this_hdr
->bfd_section
;
663 /* Process section groups. */
664 if (num_group
== (unsigned) -1)
667 for (i
= 0; i
< num_group
; i
++)
669 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
670 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
671 unsigned int n_elt
= shdr
->sh_size
/ 4;
674 if ((++idx
)->shdr
->bfd_section
)
675 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
676 else if (idx
->shdr
->sh_type
== SHT_RELA
677 || idx
->shdr
->sh_type
== SHT_REL
)
678 /* We won't include relocation sections in section groups in
679 output object files. We adjust the group section size here
680 so that relocatable link will work correctly when
681 relocation sections are in section group in input object
683 shdr
->bfd_section
->size
-= 4;
686 /* There are some unknown sections in the group. */
687 (*_bfd_error_handler
)
688 (_("%B: unknown [%d] section `%s' in group [%s]"),
690 (unsigned int) idx
->shdr
->sh_type
,
691 bfd_elf_string_from_elf_section (abfd
,
692 (elf_elfheader (abfd
)
695 shdr
->bfd_section
->name
);
703 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
705 return elf_next_in_group (sec
) != NULL
;
708 /* Make a BFD section from an ELF section. We store a pointer to the
709 BFD section in the bfd_section field of the header. */
712 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
713 Elf_Internal_Shdr
*hdr
,
719 const struct elf_backend_data
*bed
;
721 if (hdr
->bfd_section
!= NULL
)
723 BFD_ASSERT (strcmp (name
,
724 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
728 newsect
= bfd_make_section_anyway (abfd
, name
);
732 hdr
->bfd_section
= newsect
;
733 elf_section_data (newsect
)->this_hdr
= *hdr
;
734 elf_section_data (newsect
)->this_idx
= shindex
;
736 /* Always use the real type/flags. */
737 elf_section_type (newsect
) = hdr
->sh_type
;
738 elf_section_flags (newsect
) = hdr
->sh_flags
;
740 newsect
->filepos
= hdr
->sh_offset
;
742 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
743 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
744 || ! bfd_set_section_alignment (abfd
, newsect
,
745 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
748 flags
= SEC_NO_FLAGS
;
749 if (hdr
->sh_type
!= SHT_NOBITS
)
750 flags
|= SEC_HAS_CONTENTS
;
751 if (hdr
->sh_type
== SHT_GROUP
)
752 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
753 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
756 if (hdr
->sh_type
!= SHT_NOBITS
)
759 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
760 flags
|= SEC_READONLY
;
761 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
763 else if ((flags
& SEC_LOAD
) != 0)
765 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
768 newsect
->entsize
= hdr
->sh_entsize
;
769 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
770 flags
|= SEC_STRINGS
;
772 if (hdr
->sh_flags
& SHF_GROUP
)
773 if (!setup_group (abfd
, hdr
, newsect
))
775 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
776 flags
|= SEC_THREAD_LOCAL
;
778 if ((flags
& SEC_ALLOC
) == 0)
780 /* The debugging sections appear to be recognized only by name,
781 not any sort of flag. Their SEC_ALLOC bits are cleared. */
786 } debug_sections
[] =
788 { "debug", 5 }, /* 'd' */
789 { NULL
, 0 }, /* 'e' */
790 { NULL
, 0 }, /* 'f' */
791 { "gnu.linkonce.wi.", 17 }, /* 'g' */
792 { NULL
, 0 }, /* 'h' */
793 { NULL
, 0 }, /* 'i' */
794 { NULL
, 0 }, /* 'j' */
795 { NULL
, 0 }, /* 'k' */
796 { "line", 4 }, /* 'l' */
797 { NULL
, 0 }, /* 'm' */
798 { NULL
, 0 }, /* 'n' */
799 { NULL
, 0 }, /* 'o' */
800 { NULL
, 0 }, /* 'p' */
801 { NULL
, 0 }, /* 'q' */
802 { NULL
, 0 }, /* 'r' */
803 { "stab", 4 } /* 's' */
808 int i
= name
[1] - 'd';
810 && i
< (int) ARRAY_SIZE (debug_sections
)
811 && debug_sections
[i
].name
!= NULL
812 && strncmp (&name
[1], debug_sections
[i
].name
,
813 debug_sections
[i
].len
) == 0)
814 flags
|= SEC_DEBUGGING
;
818 /* As a GNU extension, if the name begins with .gnu.linkonce, we
819 only link a single copy of the section. This is used to support
820 g++. g++ will emit each template expansion in its own section.
821 The symbols will be defined as weak, so that multiple definitions
822 are permitted. The GNU linker extension is to actually discard
823 all but one of the sections. */
824 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
825 && elf_next_in_group (newsect
) == NULL
)
826 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
828 bed
= get_elf_backend_data (abfd
);
829 if (bed
->elf_backend_section_flags
)
830 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
833 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
836 if ((flags
& SEC_ALLOC
) != 0)
838 Elf_Internal_Phdr
*phdr
;
841 /* Look through the phdrs to see if we need to adjust the lma.
842 If all the p_paddr fields are zero, we ignore them, since
843 some ELF linkers produce such output. */
844 phdr
= elf_tdata (abfd
)->phdr
;
845 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
847 if (phdr
->p_paddr
!= 0)
850 if (i
< elf_elfheader (abfd
)->e_phnum
)
852 phdr
= elf_tdata (abfd
)->phdr
;
853 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
855 /* This section is part of this segment if its file
856 offset plus size lies within the segment's memory
857 span and, if the section is loaded, the extent of the
858 loaded data lies within the extent of the segment.
860 Note - we used to check the p_paddr field as well, and
861 refuse to set the LMA if it was 0. This is wrong
862 though, as a perfectly valid initialised segment can
863 have a p_paddr of zero. Some architectures, eg ARM,
864 place special significance on the address 0 and
865 executables need to be able to have a segment which
866 covers this address. */
867 if (phdr
->p_type
== PT_LOAD
868 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
869 && (hdr
->sh_offset
+ hdr
->sh_size
870 <= phdr
->p_offset
+ phdr
->p_memsz
)
871 && ((flags
& SEC_LOAD
) == 0
872 || (hdr
->sh_offset
+ hdr
->sh_size
873 <= phdr
->p_offset
+ phdr
->p_filesz
)))
875 if ((flags
& SEC_LOAD
) == 0)
876 newsect
->lma
= (phdr
->p_paddr
877 + hdr
->sh_addr
- phdr
->p_vaddr
);
879 /* We used to use the same adjustment for SEC_LOAD
880 sections, but that doesn't work if the segment
881 is packed with code from multiple VMAs.
882 Instead we calculate the section LMA based on
883 the segment LMA. It is assumed that the
884 segment will contain sections with contiguous
885 LMAs, even if the VMAs are not. */
886 newsect
->lma
= (phdr
->p_paddr
887 + hdr
->sh_offset
- phdr
->p_offset
);
889 /* With contiguous segments, we can't tell from file
890 offsets whether a section with zero size should
891 be placed at the end of one segment or the
892 beginning of the next. Decide based on vaddr. */
893 if (hdr
->sh_addr
>= phdr
->p_vaddr
894 && (hdr
->sh_addr
+ hdr
->sh_size
895 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
910 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
913 Helper functions for GDB to locate the string tables.
914 Since BFD hides string tables from callers, GDB needs to use an
915 internal hook to find them. Sun's .stabstr, in particular,
916 isn't even pointed to by the .stab section, so ordinary
917 mechanisms wouldn't work to find it, even if we had some.
920 struct elf_internal_shdr
*
921 bfd_elf_find_section (bfd
*abfd
, char *name
)
923 Elf_Internal_Shdr
**i_shdrp
;
928 i_shdrp
= elf_elfsections (abfd
);
931 shstrtab
= bfd_elf_get_str_section (abfd
,
932 elf_elfheader (abfd
)->e_shstrndx
);
933 if (shstrtab
!= NULL
)
935 max
= elf_numsections (abfd
);
936 for (i
= 1; i
< max
; i
++)
937 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
944 const char *const bfd_elf_section_type_names
[] = {
945 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
946 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
947 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
950 /* ELF relocs are against symbols. If we are producing relocatable
951 output, and the reloc is against an external symbol, and nothing
952 has given us any additional addend, the resulting reloc will also
953 be against the same symbol. In such a case, we don't want to
954 change anything about the way the reloc is handled, since it will
955 all be done at final link time. Rather than put special case code
956 into bfd_perform_relocation, all the reloc types use this howto
957 function. It just short circuits the reloc if producing
958 relocatable output against an external symbol. */
960 bfd_reloc_status_type
961 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
962 arelent
*reloc_entry
,
964 void *data ATTRIBUTE_UNUSED
,
965 asection
*input_section
,
967 char **error_message ATTRIBUTE_UNUSED
)
969 if (output_bfd
!= NULL
970 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
971 && (! reloc_entry
->howto
->partial_inplace
972 || reloc_entry
->addend
== 0))
974 reloc_entry
->address
+= input_section
->output_offset
;
978 return bfd_reloc_continue
;
981 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
984 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
987 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
988 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
991 /* Finish SHF_MERGE section merging. */
994 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
999 if (!is_elf_hash_table (info
->hash
))
1002 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1003 if ((ibfd
->flags
& DYNAMIC
) == 0)
1004 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1005 if ((sec
->flags
& SEC_MERGE
) != 0
1006 && !bfd_is_abs_section (sec
->output_section
))
1008 struct bfd_elf_section_data
*secdata
;
1010 secdata
= elf_section_data (sec
);
1011 if (! _bfd_add_merge_section (abfd
,
1012 &elf_hash_table (info
)->merge_info
,
1013 sec
, &secdata
->sec_info
))
1015 else if (secdata
->sec_info
)
1016 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
1019 if (elf_hash_table (info
)->merge_info
!= NULL
)
1020 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
1021 merge_sections_remove_hook
);
1026 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
1028 sec
->output_section
= bfd_abs_section_ptr
;
1029 sec
->output_offset
= sec
->vma
;
1030 if (!is_elf_hash_table (info
->hash
))
1033 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
1036 /* Copy the program header and other data from one object module to
1040 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
1042 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1043 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1046 BFD_ASSERT (!elf_flags_init (obfd
)
1047 || (elf_elfheader (obfd
)->e_flags
1048 == elf_elfheader (ibfd
)->e_flags
));
1050 elf_gp (obfd
) = elf_gp (ibfd
);
1051 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1052 elf_flags_init (obfd
) = TRUE
;
1056 /* Print out the program headers. */
1059 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1062 Elf_Internal_Phdr
*p
;
1064 bfd_byte
*dynbuf
= NULL
;
1066 p
= elf_tdata (abfd
)->phdr
;
1071 fprintf (f
, _("\nProgram Header:\n"));
1072 c
= elf_elfheader (abfd
)->e_phnum
;
1073 for (i
= 0; i
< c
; i
++, p
++)
1080 case PT_NULL
: pt
= "NULL"; break;
1081 case PT_LOAD
: pt
= "LOAD"; break;
1082 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1083 case PT_INTERP
: pt
= "INTERP"; break;
1084 case PT_NOTE
: pt
= "NOTE"; break;
1085 case PT_SHLIB
: pt
= "SHLIB"; break;
1086 case PT_PHDR
: pt
= "PHDR"; break;
1087 case PT_TLS
: pt
= "TLS"; break;
1088 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1089 case PT_GNU_STACK
: pt
= "STACK"; break;
1090 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1091 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1093 fprintf (f
, "%8s off 0x", pt
);
1094 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1095 fprintf (f
, " vaddr 0x");
1096 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1097 fprintf (f
, " paddr 0x");
1098 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1099 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1100 fprintf (f
, " filesz 0x");
1101 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1102 fprintf (f
, " memsz 0x");
1103 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1104 fprintf (f
, " flags %c%c%c",
1105 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1106 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1107 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1108 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1109 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1114 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1118 unsigned long shlink
;
1119 bfd_byte
*extdyn
, *extdynend
;
1121 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1123 fprintf (f
, _("\nDynamic Section:\n"));
1125 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1128 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1131 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1133 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1134 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1137 extdynend
= extdyn
+ s
->size
;
1138 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1140 Elf_Internal_Dyn dyn
;
1143 bfd_boolean stringp
;
1145 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1147 if (dyn
.d_tag
== DT_NULL
)
1154 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1158 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1159 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1160 case DT_PLTGOT
: name
= "PLTGOT"; break;
1161 case DT_HASH
: name
= "HASH"; break;
1162 case DT_STRTAB
: name
= "STRTAB"; break;
1163 case DT_SYMTAB
: name
= "SYMTAB"; break;
1164 case DT_RELA
: name
= "RELA"; break;
1165 case DT_RELASZ
: name
= "RELASZ"; break;
1166 case DT_RELAENT
: name
= "RELAENT"; break;
1167 case DT_STRSZ
: name
= "STRSZ"; break;
1168 case DT_SYMENT
: name
= "SYMENT"; break;
1169 case DT_INIT
: name
= "INIT"; break;
1170 case DT_FINI
: name
= "FINI"; break;
1171 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1172 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1173 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1174 case DT_REL
: name
= "REL"; break;
1175 case DT_RELSZ
: name
= "RELSZ"; break;
1176 case DT_RELENT
: name
= "RELENT"; break;
1177 case DT_PLTREL
: name
= "PLTREL"; break;
1178 case DT_DEBUG
: name
= "DEBUG"; break;
1179 case DT_TEXTREL
: name
= "TEXTREL"; break;
1180 case DT_JMPREL
: name
= "JMPREL"; break;
1181 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1182 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1183 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1184 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1185 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1186 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1187 case DT_FLAGS
: name
= "FLAGS"; break;
1188 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1189 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1190 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1191 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1192 case DT_MOVEENT
: name
= "MOVEENT"; break;
1193 case DT_MOVESZ
: name
= "MOVESZ"; break;
1194 case DT_FEATURE
: name
= "FEATURE"; break;
1195 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1196 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1197 case DT_SYMINENT
: name
= "SYMINENT"; break;
1198 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1199 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1200 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1201 case DT_PLTPAD
: name
= "PLTPAD"; break;
1202 case DT_MOVETAB
: name
= "MOVETAB"; break;
1203 case DT_SYMINFO
: name
= "SYMINFO"; break;
1204 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1205 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1206 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1207 case DT_VERSYM
: name
= "VERSYM"; break;
1208 case DT_VERDEF
: name
= "VERDEF"; break;
1209 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1210 case DT_VERNEED
: name
= "VERNEED"; break;
1211 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1212 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1213 case DT_USED
: name
= "USED"; break;
1214 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1217 fprintf (f
, " %-11s ", name
);
1219 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1223 unsigned int tagv
= dyn
.d_un
.d_val
;
1225 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1228 fprintf (f
, "%s", string
);
1237 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1238 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1240 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1244 if (elf_dynverdef (abfd
) != 0)
1246 Elf_Internal_Verdef
*t
;
1248 fprintf (f
, _("\nVersion definitions:\n"));
1249 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1251 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1252 t
->vd_flags
, t
->vd_hash
,
1253 t
->vd_nodename
? t
->vd_nodename
: "<corrupt>");
1254 if (t
->vd_auxptr
!= NULL
&& t
->vd_auxptr
->vda_nextptr
!= NULL
)
1256 Elf_Internal_Verdaux
*a
;
1259 for (a
= t
->vd_auxptr
->vda_nextptr
;
1263 a
->vda_nodename
? a
->vda_nodename
: "<corrupt>");
1269 if (elf_dynverref (abfd
) != 0)
1271 Elf_Internal_Verneed
*t
;
1273 fprintf (f
, _("\nVersion References:\n"));
1274 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1276 Elf_Internal_Vernaux
*a
;
1278 fprintf (f
, _(" required from %s:\n"),
1279 t
->vn_filename
? t
->vn_filename
: "<corrupt>");
1280 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1281 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1282 a
->vna_flags
, a
->vna_other
,
1283 a
->vna_nodename
? a
->vna_nodename
: "<corrupt>");
1295 /* Display ELF-specific fields of a symbol. */
1298 bfd_elf_print_symbol (bfd
*abfd
,
1301 bfd_print_symbol_type how
)
1306 case bfd_print_symbol_name
:
1307 fprintf (file
, "%s", symbol
->name
);
1309 case bfd_print_symbol_more
:
1310 fprintf (file
, "elf ");
1311 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1312 fprintf (file
, " %lx", (long) symbol
->flags
);
1314 case bfd_print_symbol_all
:
1316 const char *section_name
;
1317 const char *name
= NULL
;
1318 const struct elf_backend_data
*bed
;
1319 unsigned char st_other
;
1322 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1324 bed
= get_elf_backend_data (abfd
);
1325 if (bed
->elf_backend_print_symbol_all
)
1326 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1330 name
= symbol
->name
;
1331 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1334 fprintf (file
, " %s\t", section_name
);
1335 /* Print the "other" value for a symbol. For common symbols,
1336 we've already printed the size; now print the alignment.
1337 For other symbols, we have no specified alignment, and
1338 we've printed the address; now print the size. */
1339 if (bfd_is_com_section (symbol
->section
))
1340 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1342 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1343 bfd_fprintf_vma (abfd
, file
, val
);
1345 /* If we have version information, print it. */
1346 if (elf_tdata (abfd
)->dynversym_section
!= 0
1347 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1348 || elf_tdata (abfd
)->dynverref_section
!= 0))
1350 unsigned int vernum
;
1351 const char *version_string
;
1353 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1356 version_string
= "";
1357 else if (vernum
== 1)
1358 version_string
= "Base";
1359 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1361 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1364 Elf_Internal_Verneed
*t
;
1366 version_string
= "";
1367 for (t
= elf_tdata (abfd
)->verref
;
1371 Elf_Internal_Vernaux
*a
;
1373 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1375 if (a
->vna_other
== vernum
)
1377 version_string
= a
->vna_nodename
;
1384 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1385 fprintf (file
, " %-11s", version_string
);
1390 fprintf (file
, " (%s)", version_string
);
1391 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1396 /* If the st_other field is not zero, print it. */
1397 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1402 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1403 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1404 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1406 /* Some other non-defined flags are also present, so print
1408 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1411 fprintf (file
, " %s", name
);
1417 /* Create an entry in an ELF linker hash table. */
1419 struct bfd_hash_entry
*
1420 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1421 struct bfd_hash_table
*table
,
1424 /* Allocate the structure if it has not already been allocated by a
1428 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1433 /* Call the allocation method of the superclass. */
1434 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1437 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1438 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1440 /* Set local fields. */
1443 ret
->got
= htab
->init_got_refcount
;
1444 ret
->plt
= htab
->init_plt_refcount
;
1445 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1446 - offsetof (struct elf_link_hash_entry
, size
)));
1447 /* Assume that we have been called by a non-ELF symbol reader.
1448 This flag is then reset by the code which reads an ELF input
1449 file. This ensures that a symbol created by a non-ELF symbol
1450 reader will have the flag set correctly. */
1457 /* Copy data from an indirect symbol to its direct symbol, hiding the
1458 old indirect symbol. Also used for copying flags to a weakdef. */
1461 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
1462 struct elf_link_hash_entry
*dir
,
1463 struct elf_link_hash_entry
*ind
)
1465 struct elf_link_hash_table
*htab
;
1467 /* Copy down any references that we may have already seen to the
1468 symbol which just became indirect. */
1470 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1471 dir
->ref_regular
|= ind
->ref_regular
;
1472 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1473 dir
->non_got_ref
|= ind
->non_got_ref
;
1474 dir
->needs_plt
|= ind
->needs_plt
;
1475 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1477 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1480 /* Copy over the global and procedure linkage table refcount entries.
1481 These may have been already set up by a check_relocs routine. */
1482 htab
= elf_hash_table (info
);
1483 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
1485 if (dir
->got
.refcount
< 0)
1486 dir
->got
.refcount
= 0;
1487 dir
->got
.refcount
+= ind
->got
.refcount
;
1488 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
1491 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
1493 if (dir
->plt
.refcount
< 0)
1494 dir
->plt
.refcount
= 0;
1495 dir
->plt
.refcount
+= ind
->plt
.refcount
;
1496 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
1499 if (ind
->dynindx
!= -1)
1501 if (dir
->dynindx
!= -1)
1502 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
1503 dir
->dynindx
= ind
->dynindx
;
1504 dir
->dynstr_index
= ind
->dynstr_index
;
1506 ind
->dynstr_index
= 0;
1511 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1512 struct elf_link_hash_entry
*h
,
1513 bfd_boolean force_local
)
1515 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
1519 h
->forced_local
= 1;
1520 if (h
->dynindx
!= -1)
1523 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1529 /* Initialize an ELF linker hash table. */
1532 _bfd_elf_link_hash_table_init
1533 (struct elf_link_hash_table
*table
,
1535 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1536 struct bfd_hash_table
*,
1540 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1542 table
->dynamic_sections_created
= FALSE
;
1543 table
->dynobj
= NULL
;
1544 table
->init_got_refcount
.refcount
= can_refcount
- 1;
1545 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
1546 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
1547 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
1548 /* The first dynamic symbol is a dummy. */
1549 table
->dynsymcount
= 1;
1550 table
->dynstr
= NULL
;
1551 table
->bucketcount
= 0;
1552 table
->needed
= NULL
;
1554 table
->merge_info
= NULL
;
1555 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1556 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1557 table
->dynlocal
= NULL
;
1558 table
->runpath
= NULL
;
1559 table
->tls_sec
= NULL
;
1560 table
->tls_size
= 0;
1561 table
->loaded
= NULL
;
1562 table
->is_relocatable_executable
= FALSE
;
1564 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1565 table
->root
.type
= bfd_link_elf_hash_table
;
1570 /* Create an ELF linker hash table. */
1572 struct bfd_link_hash_table
*
1573 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1575 struct elf_link_hash_table
*ret
;
1576 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1578 ret
= bfd_malloc (amt
);
1582 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1591 /* This is a hook for the ELF emulation code in the generic linker to
1592 tell the backend linker what file name to use for the DT_NEEDED
1593 entry for a dynamic object. */
1596 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1598 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1599 && bfd_get_format (abfd
) == bfd_object
)
1600 elf_dt_name (abfd
) = name
;
1604 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1607 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1608 && bfd_get_format (abfd
) == bfd_object
)
1609 lib_class
= elf_dyn_lib_class (abfd
);
1616 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1618 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1619 && bfd_get_format (abfd
) == bfd_object
)
1620 elf_dyn_lib_class (abfd
) = lib_class
;
1623 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1624 the linker ELF emulation code. */
1626 struct bfd_link_needed_list
*
1627 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1628 struct bfd_link_info
*info
)
1630 if (! is_elf_hash_table (info
->hash
))
1632 return elf_hash_table (info
)->needed
;
1635 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1636 hook for the linker ELF emulation code. */
1638 struct bfd_link_needed_list
*
1639 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1640 struct bfd_link_info
*info
)
1642 if (! is_elf_hash_table (info
->hash
))
1644 return elf_hash_table (info
)->runpath
;
1647 /* Get the name actually used for a dynamic object for a link. This
1648 is the SONAME entry if there is one. Otherwise, it is the string
1649 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1652 bfd_elf_get_dt_soname (bfd
*abfd
)
1654 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1655 && bfd_get_format (abfd
) == bfd_object
)
1656 return elf_dt_name (abfd
);
1660 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1661 the ELF linker emulation code. */
1664 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1665 struct bfd_link_needed_list
**pneeded
)
1668 bfd_byte
*dynbuf
= NULL
;
1670 unsigned long shlink
;
1671 bfd_byte
*extdyn
, *extdynend
;
1673 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1677 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1678 || bfd_get_format (abfd
) != bfd_object
)
1681 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1682 if (s
== NULL
|| s
->size
== 0)
1685 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1688 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1692 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1694 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1695 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1698 extdynend
= extdyn
+ s
->size
;
1699 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1701 Elf_Internal_Dyn dyn
;
1703 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1705 if (dyn
.d_tag
== DT_NULL
)
1708 if (dyn
.d_tag
== DT_NEEDED
)
1711 struct bfd_link_needed_list
*l
;
1712 unsigned int tagv
= dyn
.d_un
.d_val
;
1715 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1720 l
= bfd_alloc (abfd
, amt
);
1741 /* Allocate an ELF string table--force the first byte to be zero. */
1743 struct bfd_strtab_hash
*
1744 _bfd_elf_stringtab_init (void)
1746 struct bfd_strtab_hash
*ret
;
1748 ret
= _bfd_stringtab_init ();
1753 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1754 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1755 if (loc
== (bfd_size_type
) -1)
1757 _bfd_stringtab_free (ret
);
1764 /* ELF .o/exec file reading */
1766 /* Create a new bfd section from an ELF section header. */
1769 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1771 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1772 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1773 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1776 name
= bfd_elf_string_from_elf_section (abfd
,
1777 elf_elfheader (abfd
)->e_shstrndx
,
1782 switch (hdr
->sh_type
)
1785 /* Inactive section. Throw it away. */
1788 case SHT_PROGBITS
: /* Normal section with contents. */
1789 case SHT_NOBITS
: /* .bss section. */
1790 case SHT_HASH
: /* .hash section. */
1791 case SHT_NOTE
: /* .note section. */
1792 case SHT_INIT_ARRAY
: /* .init_array section. */
1793 case SHT_FINI_ARRAY
: /* .fini_array section. */
1794 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1795 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1796 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1798 case SHT_DYNAMIC
: /* Dynamic linking information. */
1799 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1801 if (hdr
->sh_link
> elf_numsections (abfd
)
1802 || elf_elfsections (abfd
)[hdr
->sh_link
] == NULL
)
1804 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1806 Elf_Internal_Shdr
*dynsymhdr
;
1808 /* The shared libraries distributed with hpux11 have a bogus
1809 sh_link field for the ".dynamic" section. Find the
1810 string table for the ".dynsym" section instead. */
1811 if (elf_dynsymtab (abfd
) != 0)
1813 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1814 hdr
->sh_link
= dynsymhdr
->sh_link
;
1818 unsigned int i
, num_sec
;
1820 num_sec
= elf_numsections (abfd
);
1821 for (i
= 1; i
< num_sec
; i
++)
1823 dynsymhdr
= elf_elfsections (abfd
)[i
];
1824 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1826 hdr
->sh_link
= dynsymhdr
->sh_link
;
1834 case SHT_SYMTAB
: /* A symbol table */
1835 if (elf_onesymtab (abfd
) == shindex
)
1838 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1840 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1841 elf_onesymtab (abfd
) = shindex
;
1842 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1843 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1844 abfd
->flags
|= HAS_SYMS
;
1846 /* Sometimes a shared object will map in the symbol table. If
1847 SHF_ALLOC is set, and this is a shared object, then we also
1848 treat this section as a BFD section. We can not base the
1849 decision purely on SHF_ALLOC, because that flag is sometimes
1850 set in a relocatable object file, which would confuse the
1852 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1853 && (abfd
->flags
& DYNAMIC
) != 0
1854 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1858 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1859 can't read symbols without that section loaded as well. It
1860 is most likely specified by the next section header. */
1861 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1863 unsigned int i
, num_sec
;
1865 num_sec
= elf_numsections (abfd
);
1866 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1868 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1869 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1870 && hdr2
->sh_link
== shindex
)
1874 for (i
= 1; i
< shindex
; i
++)
1876 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1877 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1878 && hdr2
->sh_link
== shindex
)
1882 return bfd_section_from_shdr (abfd
, i
);
1886 case SHT_DYNSYM
: /* A dynamic symbol table */
1887 if (elf_dynsymtab (abfd
) == shindex
)
1890 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1892 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1893 elf_dynsymtab (abfd
) = shindex
;
1894 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1895 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1896 abfd
->flags
|= HAS_SYMS
;
1898 /* Besides being a symbol table, we also treat this as a regular
1899 section, so that objcopy can handle it. */
1900 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1902 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1903 if (elf_symtab_shndx (abfd
) == shindex
)
1906 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1907 elf_symtab_shndx (abfd
) = shindex
;
1908 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1909 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1912 case SHT_STRTAB
: /* A string table */
1913 if (hdr
->bfd_section
!= NULL
)
1915 if (ehdr
->e_shstrndx
== shindex
)
1917 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1918 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1921 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1924 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1925 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1928 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1931 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1932 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1933 elf_elfsections (abfd
)[shindex
] = hdr
;
1934 /* We also treat this as a regular section, so that objcopy
1936 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1940 /* If the string table isn't one of the above, then treat it as a
1941 regular section. We need to scan all the headers to be sure,
1942 just in case this strtab section appeared before the above. */
1943 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1945 unsigned int i
, num_sec
;
1947 num_sec
= elf_numsections (abfd
);
1948 for (i
= 1; i
< num_sec
; i
++)
1950 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1951 if (hdr2
->sh_link
== shindex
)
1953 /* Prevent endless recursion on broken objects. */
1956 if (! bfd_section_from_shdr (abfd
, i
))
1958 if (elf_onesymtab (abfd
) == i
)
1960 if (elf_dynsymtab (abfd
) == i
)
1961 goto dynsymtab_strtab
;
1965 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1969 /* *These* do a lot of work -- but build no sections! */
1971 asection
*target_sect
;
1972 Elf_Internal_Shdr
*hdr2
;
1973 unsigned int num_sec
= elf_numsections (abfd
);
1976 != (bfd_size_type
) (hdr
->sh_type
== SHT_REL
1977 ? bed
->s
->sizeof_rel
: bed
->s
->sizeof_rela
))
1980 /* Check for a bogus link to avoid crashing. */
1981 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1982 || hdr
->sh_link
>= num_sec
)
1984 ((*_bfd_error_handler
)
1985 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1986 abfd
, hdr
->sh_link
, name
, shindex
));
1987 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1991 /* For some incomprehensible reason Oracle distributes
1992 libraries for Solaris in which some of the objects have
1993 bogus sh_link fields. It would be nice if we could just
1994 reject them, but, unfortunately, some people need to use
1995 them. We scan through the section headers; if we find only
1996 one suitable symbol table, we clobber the sh_link to point
1997 to it. I hope this doesn't break anything. */
1998 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1999 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
2005 for (scan
= 1; scan
< num_sec
; scan
++)
2007 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
2008 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
2019 hdr
->sh_link
= found
;
2022 /* Get the symbol table. */
2023 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
2024 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
2025 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
2028 /* If this reloc section does not use the main symbol table we
2029 don't treat it as a reloc section. BFD can't adequately
2030 represent such a section, so at least for now, we don't
2031 try. We just present it as a normal section. We also
2032 can't use it as a reloc section if it points to the null
2034 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
2035 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
2038 /* Prevent endless recursion on broken objects. */
2039 if (elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_REL
2040 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_RELA
)
2042 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
2044 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
2045 if (target_sect
== NULL
)
2048 if ((target_sect
->flags
& SEC_RELOC
) == 0
2049 || target_sect
->reloc_count
== 0)
2050 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
2054 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
2055 amt
= sizeof (*hdr2
);
2056 hdr2
= bfd_alloc (abfd
, amt
);
2057 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
2060 elf_elfsections (abfd
)[shindex
] = hdr2
;
2061 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
2062 target_sect
->flags
|= SEC_RELOC
;
2063 target_sect
->relocation
= NULL
;
2064 target_sect
->rel_filepos
= hdr
->sh_offset
;
2065 /* In the section to which the relocations apply, mark whether
2066 its relocations are of the REL or RELA variety. */
2067 if (hdr
->sh_size
!= 0)
2068 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2069 abfd
->flags
|= HAS_RELOC
;
2074 case SHT_GNU_verdef
:
2075 elf_dynverdef (abfd
) = shindex
;
2076 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2077 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2080 case SHT_GNU_versym
:
2081 if (hdr
->sh_entsize
!= sizeof (Elf_External_Versym
))
2083 elf_dynversym (abfd
) = shindex
;
2084 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2085 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2088 case SHT_GNU_verneed
:
2089 elf_dynverref (abfd
) = shindex
;
2090 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2091 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2098 /* We need a BFD section for objcopy and relocatable linking,
2099 and it's handy to have the signature available as the section
2101 if (hdr
->sh_entsize
!= GRP_ENTRY_SIZE
)
2103 name
= group_signature (abfd
, hdr
);
2106 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2108 if (hdr
->contents
!= NULL
)
2110 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2111 unsigned int n_elt
= hdr
->sh_size
/ 4;
2114 if (idx
->flags
& GRP_COMDAT
)
2115 hdr
->bfd_section
->flags
2116 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2118 /* We try to keep the same section order as it comes in. */
2120 while (--n_elt
!= 0)
2121 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2122 && elf_next_in_group (s
) != NULL
)
2124 elf_next_in_group (hdr
->bfd_section
) = s
;
2131 /* Check for any processor-specific section types. */
2132 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2139 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2140 Return SEC for sections that have no elf section, and NULL on error. */
2143 bfd_section_from_r_symndx (bfd
*abfd
,
2144 struct sym_sec_cache
*cache
,
2146 unsigned long r_symndx
)
2148 Elf_Internal_Shdr
*symtab_hdr
;
2149 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2150 Elf_External_Sym_Shndx eshndx
;
2151 Elf_Internal_Sym isym
;
2152 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2154 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2155 return cache
->sec
[ent
];
2157 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2158 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2159 &isym
, esym
, &eshndx
) == NULL
)
2162 if (cache
->abfd
!= abfd
)
2164 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2167 cache
->indx
[ent
] = r_symndx
;
2168 cache
->sec
[ent
] = sec
;
2169 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2170 || isym
.st_shndx
> SHN_HIRESERVE
)
2173 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2175 cache
->sec
[ent
] = s
;
2177 return cache
->sec
[ent
];
2180 /* Given an ELF section number, retrieve the corresponding BFD
2184 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2186 if (index
>= elf_numsections (abfd
))
2188 return elf_elfsections (abfd
)[index
]->bfd_section
;
2191 static const struct bfd_elf_special_section special_sections_b
[] =
2193 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2194 { NULL
, 0, 0, 0, 0 }
2197 static const struct bfd_elf_special_section special_sections_c
[] =
2199 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2200 { NULL
, 0, 0, 0, 0 }
2203 static const struct bfd_elf_special_section special_sections_d
[] =
2205 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2206 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2207 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2208 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2209 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2210 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2211 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2212 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2213 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2214 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2215 { NULL
, 0, 0, 0, 0 }
2218 static const struct bfd_elf_special_section special_sections_f
[] =
2220 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2221 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2222 { NULL
, 0, 0, 0, 0 }
2225 static const struct bfd_elf_special_section special_sections_g
[] =
2227 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2228 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2229 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2230 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2231 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2232 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2233 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2234 { NULL
, 0, 0, 0, 0 }
2237 static const struct bfd_elf_special_section special_sections_h
[] =
2239 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2240 { NULL
, 0, 0, 0, 0 }
2243 static const struct bfd_elf_special_section special_sections_i
[] =
2245 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2246 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2247 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2248 { NULL
, 0, 0, 0, 0 }
2251 static const struct bfd_elf_special_section special_sections_l
[] =
2253 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2254 { NULL
, 0, 0, 0, 0 }
2257 static const struct bfd_elf_special_section special_sections_n
[] =
2259 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2260 { ".note", 5, -1, SHT_NOTE
, 0 },
2261 { NULL
, 0, 0, 0, 0 }
2264 static const struct bfd_elf_special_section special_sections_p
[] =
2266 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2267 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2268 { NULL
, 0, 0, 0, 0 }
2271 static const struct bfd_elf_special_section special_sections_r
[] =
2273 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2274 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2275 { ".rela", 5, -1, SHT_RELA
, 0 },
2276 { ".rel", 4, -1, SHT_REL
, 0 },
2277 { NULL
, 0, 0, 0, 0 }
2280 static const struct bfd_elf_special_section special_sections_s
[] =
2282 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2283 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2284 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2285 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2286 { NULL
, 0, 0, 0, 0 }
2289 static const struct bfd_elf_special_section special_sections_t
[] =
2291 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2292 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2293 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2294 { NULL
, 0, 0, 0, 0 }
2297 static const struct bfd_elf_special_section
*special_sections
[] =
2299 special_sections_b
, /* 'b' */
2300 special_sections_c
, /* 'b' */
2301 special_sections_d
, /* 'd' */
2303 special_sections_f
, /* 'f' */
2304 special_sections_g
, /* 'g' */
2305 special_sections_h
, /* 'h' */
2306 special_sections_i
, /* 'i' */
2309 special_sections_l
, /* 'l' */
2311 special_sections_n
, /* 'n' */
2313 special_sections_p
, /* 'p' */
2315 special_sections_r
, /* 'r' */
2316 special_sections_s
, /* 's' */
2317 special_sections_t
, /* 't' */
2320 const struct bfd_elf_special_section
*
2321 _bfd_elf_get_special_section (const char *name
,
2322 const struct bfd_elf_special_section
*spec
,
2328 len
= strlen (name
);
2330 for (i
= 0; spec
[i
].prefix
!= NULL
; i
++)
2333 int prefix_len
= spec
[i
].prefix_length
;
2335 if (len
< prefix_len
)
2337 if (memcmp (name
, spec
[i
].prefix
, prefix_len
) != 0)
2340 suffix_len
= spec
[i
].suffix_length
;
2341 if (suffix_len
<= 0)
2343 if (name
[prefix_len
] != 0)
2345 if (suffix_len
== 0)
2347 if (name
[prefix_len
] != '.'
2348 && (suffix_len
== -2
2349 || (rela
&& spec
[i
].type
== SHT_REL
)))
2355 if (len
< prefix_len
+ suffix_len
)
2357 if (memcmp (name
+ len
- suffix_len
,
2358 spec
[i
].prefix
+ prefix_len
,
2368 const struct bfd_elf_special_section
*
2369 _bfd_elf_get_sec_type_attr (bfd
*abfd
, asection
*sec
)
2372 const struct bfd_elf_special_section
*spec
;
2373 const struct elf_backend_data
*bed
;
2375 /* See if this is one of the special sections. */
2376 if (sec
->name
== NULL
)
2379 bed
= get_elf_backend_data (abfd
);
2380 spec
= bed
->special_sections
;
2383 spec
= _bfd_elf_get_special_section (sec
->name
,
2384 bed
->special_sections
,
2390 if (sec
->name
[0] != '.')
2393 i
= sec
->name
[1] - 'b';
2394 if (i
< 0 || i
> 't' - 'b')
2397 spec
= special_sections
[i
];
2402 return _bfd_elf_get_special_section (sec
->name
, spec
, sec
->use_rela_p
);
2406 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2408 struct bfd_elf_section_data
*sdata
;
2409 const struct elf_backend_data
*bed
;
2410 const struct bfd_elf_special_section
*ssect
;
2412 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2415 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2418 sec
->used_by_bfd
= sdata
;
2421 /* Indicate whether or not this section should use RELA relocations. */
2422 bed
= get_elf_backend_data (abfd
);
2423 sec
->use_rela_p
= bed
->default_use_rela_p
;
2425 /* When we read a file, we don't need section type and flags unless
2426 it is a linker created section. They will be overridden in
2427 _bfd_elf_make_section_from_shdr anyway. */
2428 if (abfd
->direction
!= read_direction
2429 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2431 ssect
= (*bed
->get_sec_type_attr
) (abfd
, sec
);
2434 elf_section_type (sec
) = ssect
->type
;
2435 elf_section_flags (sec
) = ssect
->attr
;
2442 /* Create a new bfd section from an ELF program header.
2444 Since program segments have no names, we generate a synthetic name
2445 of the form segment<NUM>, where NUM is generally the index in the
2446 program header table. For segments that are split (see below) we
2447 generate the names segment<NUM>a and segment<NUM>b.
2449 Note that some program segments may have a file size that is different than
2450 (less than) the memory size. All this means is that at execution the
2451 system must allocate the amount of memory specified by the memory size,
2452 but only initialize it with the first "file size" bytes read from the
2453 file. This would occur for example, with program segments consisting
2454 of combined data+bss.
2456 To handle the above situation, this routine generates TWO bfd sections
2457 for the single program segment. The first has the length specified by
2458 the file size of the segment, and the second has the length specified
2459 by the difference between the two sizes. In effect, the segment is split
2460 into it's initialized and uninitialized parts.
2465 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2466 Elf_Internal_Phdr
*hdr
,
2468 const char *typename
)
2476 split
= ((hdr
->p_memsz
> 0)
2477 && (hdr
->p_filesz
> 0)
2478 && (hdr
->p_memsz
> hdr
->p_filesz
));
2479 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2480 len
= strlen (namebuf
) + 1;
2481 name
= bfd_alloc (abfd
, len
);
2484 memcpy (name
, namebuf
, len
);
2485 newsect
= bfd_make_section (abfd
, name
);
2486 if (newsect
== NULL
)
2488 newsect
->vma
= hdr
->p_vaddr
;
2489 newsect
->lma
= hdr
->p_paddr
;
2490 newsect
->size
= hdr
->p_filesz
;
2491 newsect
->filepos
= hdr
->p_offset
;
2492 newsect
->flags
|= SEC_HAS_CONTENTS
;
2493 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2494 if (hdr
->p_type
== PT_LOAD
)
2496 newsect
->flags
|= SEC_ALLOC
;
2497 newsect
->flags
|= SEC_LOAD
;
2498 if (hdr
->p_flags
& PF_X
)
2500 /* FIXME: all we known is that it has execute PERMISSION,
2502 newsect
->flags
|= SEC_CODE
;
2505 if (!(hdr
->p_flags
& PF_W
))
2507 newsect
->flags
|= SEC_READONLY
;
2512 sprintf (namebuf
, "%s%db", typename
, index
);
2513 len
= strlen (namebuf
) + 1;
2514 name
= bfd_alloc (abfd
, len
);
2517 memcpy (name
, namebuf
, len
);
2518 newsect
= bfd_make_section (abfd
, name
);
2519 if (newsect
== NULL
)
2521 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2522 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2523 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2524 if (hdr
->p_type
== PT_LOAD
)
2526 newsect
->flags
|= SEC_ALLOC
;
2527 if (hdr
->p_flags
& PF_X
)
2528 newsect
->flags
|= SEC_CODE
;
2530 if (!(hdr
->p_flags
& PF_W
))
2531 newsect
->flags
|= SEC_READONLY
;
2538 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2540 const struct elf_backend_data
*bed
;
2542 switch (hdr
->p_type
)
2545 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2548 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2551 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2554 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2557 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2559 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2564 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2567 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2569 case PT_GNU_EH_FRAME
:
2570 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2574 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2577 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2580 /* Check for any processor-specific program segment types. */
2581 bed
= get_elf_backend_data (abfd
);
2582 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2586 /* Initialize REL_HDR, the section-header for new section, containing
2587 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2588 relocations; otherwise, we use REL relocations. */
2591 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2592 Elf_Internal_Shdr
*rel_hdr
,
2594 bfd_boolean use_rela_p
)
2597 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2598 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2600 name
= bfd_alloc (abfd
, amt
);
2603 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2605 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2607 if (rel_hdr
->sh_name
== (unsigned int) -1)
2609 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2610 rel_hdr
->sh_entsize
= (use_rela_p
2611 ? bed
->s
->sizeof_rela
2612 : bed
->s
->sizeof_rel
);
2613 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2614 rel_hdr
->sh_flags
= 0;
2615 rel_hdr
->sh_addr
= 0;
2616 rel_hdr
->sh_size
= 0;
2617 rel_hdr
->sh_offset
= 0;
2622 /* Set up an ELF internal section header for a section. */
2625 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2627 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2628 bfd_boolean
*failedptr
= failedptrarg
;
2629 Elf_Internal_Shdr
*this_hdr
;
2633 /* We already failed; just get out of the bfd_map_over_sections
2638 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2640 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2641 asect
->name
, FALSE
);
2642 if (this_hdr
->sh_name
== (unsigned int) -1)
2648 /* Don't clear sh_flags. Assembler may set additional bits. */
2650 if ((asect
->flags
& SEC_ALLOC
) != 0
2651 || asect
->user_set_vma
)
2652 this_hdr
->sh_addr
= asect
->vma
;
2654 this_hdr
->sh_addr
= 0;
2656 this_hdr
->sh_offset
= 0;
2657 this_hdr
->sh_size
= asect
->size
;
2658 this_hdr
->sh_link
= 0;
2659 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2660 /* The sh_entsize and sh_info fields may have been set already by
2661 copy_private_section_data. */
2663 this_hdr
->bfd_section
= asect
;
2664 this_hdr
->contents
= NULL
;
2666 /* If the section type is unspecified, we set it based on
2668 if (this_hdr
->sh_type
== SHT_NULL
)
2670 if ((asect
->flags
& SEC_GROUP
) != 0)
2671 this_hdr
->sh_type
= SHT_GROUP
;
2672 else if ((asect
->flags
& SEC_ALLOC
) != 0
2673 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2674 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2675 this_hdr
->sh_type
= SHT_NOBITS
;
2677 this_hdr
->sh_type
= SHT_PROGBITS
;
2680 switch (this_hdr
->sh_type
)
2686 case SHT_INIT_ARRAY
:
2687 case SHT_FINI_ARRAY
:
2688 case SHT_PREINIT_ARRAY
:
2695 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2699 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2703 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2707 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2708 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2712 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2713 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2716 case SHT_GNU_versym
:
2717 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2720 case SHT_GNU_verdef
:
2721 this_hdr
->sh_entsize
= 0;
2722 /* objcopy or strip will copy over sh_info, but may not set
2723 cverdefs. The linker will set cverdefs, but sh_info will be
2725 if (this_hdr
->sh_info
== 0)
2726 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2728 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2729 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2732 case SHT_GNU_verneed
:
2733 this_hdr
->sh_entsize
= 0;
2734 /* objcopy or strip will copy over sh_info, but may not set
2735 cverrefs. The linker will set cverrefs, but sh_info will be
2737 if (this_hdr
->sh_info
== 0)
2738 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2740 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2741 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2745 this_hdr
->sh_entsize
= 4;
2749 if ((asect
->flags
& SEC_ALLOC
) != 0)
2750 this_hdr
->sh_flags
|= SHF_ALLOC
;
2751 if ((asect
->flags
& SEC_READONLY
) == 0)
2752 this_hdr
->sh_flags
|= SHF_WRITE
;
2753 if ((asect
->flags
& SEC_CODE
) != 0)
2754 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2755 if ((asect
->flags
& SEC_MERGE
) != 0)
2757 this_hdr
->sh_flags
|= SHF_MERGE
;
2758 this_hdr
->sh_entsize
= asect
->entsize
;
2759 if ((asect
->flags
& SEC_STRINGS
) != 0)
2760 this_hdr
->sh_flags
|= SHF_STRINGS
;
2762 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2763 this_hdr
->sh_flags
|= SHF_GROUP
;
2764 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2766 this_hdr
->sh_flags
|= SHF_TLS
;
2767 if (asect
->size
== 0
2768 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2770 struct bfd_link_order
*o
= asect
->map_tail
.link_order
;
2772 this_hdr
->sh_size
= 0;
2775 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2776 if (this_hdr
->sh_size
!= 0)
2777 this_hdr
->sh_type
= SHT_NOBITS
;
2782 /* Check for processor-specific section types. */
2783 if (bed
->elf_backend_fake_sections
2784 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2787 /* If the section has relocs, set up a section header for the
2788 SHT_REL[A] section. If two relocation sections are required for
2789 this section, it is up to the processor-specific back-end to
2790 create the other. */
2791 if ((asect
->flags
& SEC_RELOC
) != 0
2792 && !_bfd_elf_init_reloc_shdr (abfd
,
2793 &elf_section_data (asect
)->rel_hdr
,
2799 /* Fill in the contents of a SHT_GROUP section. */
2802 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2804 bfd_boolean
*failedptr
= failedptrarg
;
2805 unsigned long symindx
;
2806 asection
*elt
, *first
;
2810 /* Ignore linker created group section. See elfNN_ia64_object_p in
2812 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2817 if (elf_group_id (sec
) != NULL
)
2818 symindx
= elf_group_id (sec
)->udata
.i
;
2822 /* If called from the assembler, swap_out_syms will have set up
2823 elf_section_syms; If called for "ld -r", use target_index. */
2824 if (elf_section_syms (abfd
) != NULL
)
2825 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2827 symindx
= sec
->target_index
;
2829 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2831 /* The contents won't be allocated for "ld -r" or objcopy. */
2833 if (sec
->contents
== NULL
)
2836 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2838 /* Arrange for the section to be written out. */
2839 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2840 if (sec
->contents
== NULL
)
2847 loc
= sec
->contents
+ sec
->size
;
2849 /* Get the pointer to the first section in the group that gas
2850 squirreled away here. objcopy arranges for this to be set to the
2851 start of the input section group. */
2852 first
= elt
= elf_next_in_group (sec
);
2854 /* First element is a flag word. Rest of section is elf section
2855 indices for all the sections of the group. Write them backwards
2856 just to keep the group in the same order as given in .section
2857 directives, not that it matters. */
2866 s
= s
->output_section
;
2869 idx
= elf_section_data (s
)->this_idx
;
2870 H_PUT_32 (abfd
, idx
, loc
);
2871 elt
= elf_next_in_group (elt
);
2876 if ((loc
-= 4) != sec
->contents
)
2879 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2882 /* Assign all ELF section numbers. The dummy first section is handled here
2883 too. The link/info pointers for the standard section types are filled
2884 in here too, while we're at it. */
2887 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2889 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2891 unsigned int section_number
, secn
;
2892 Elf_Internal_Shdr
**i_shdrp
;
2893 struct bfd_elf_section_data
*d
;
2897 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2899 /* SHT_GROUP sections are in relocatable files only. */
2900 if (link_info
== NULL
|| link_info
->relocatable
)
2902 /* Put SHT_GROUP sections first. */
2903 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2905 d
= elf_section_data (sec
);
2907 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2909 if (sec
->flags
& SEC_LINKER_CREATED
)
2911 /* Remove the linker created SHT_GROUP sections. */
2912 bfd_section_list_remove (abfd
, sec
);
2913 abfd
->section_count
--;
2917 if (section_number
== SHN_LORESERVE
)
2918 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2919 d
->this_idx
= section_number
++;
2925 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2927 d
= elf_section_data (sec
);
2929 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2931 if (section_number
== SHN_LORESERVE
)
2932 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2933 d
->this_idx
= section_number
++;
2935 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2936 if ((sec
->flags
& SEC_RELOC
) == 0)
2940 if (section_number
== SHN_LORESERVE
)
2941 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2942 d
->rel_idx
= section_number
++;
2943 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2948 if (section_number
== SHN_LORESERVE
)
2949 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2950 d
->rel_idx2
= section_number
++;
2951 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2957 if (section_number
== SHN_LORESERVE
)
2958 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2959 t
->shstrtab_section
= section_number
++;
2960 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2961 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2963 if (bfd_get_symcount (abfd
) > 0)
2965 if (section_number
== SHN_LORESERVE
)
2966 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2967 t
->symtab_section
= section_number
++;
2968 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2969 if (section_number
> SHN_LORESERVE
- 2)
2971 if (section_number
== SHN_LORESERVE
)
2972 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2973 t
->symtab_shndx_section
= section_number
++;
2974 t
->symtab_shndx_hdr
.sh_name
2975 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2976 ".symtab_shndx", FALSE
);
2977 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2980 if (section_number
== SHN_LORESERVE
)
2981 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2982 t
->strtab_section
= section_number
++;
2983 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2986 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2987 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2989 elf_numsections (abfd
) = section_number
;
2990 elf_elfheader (abfd
)->e_shnum
= section_number
;
2991 if (section_number
> SHN_LORESERVE
)
2992 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2994 /* Set up the list of section header pointers, in agreement with the
2996 i_shdrp
= bfd_zalloc2 (abfd
, section_number
, sizeof (Elf_Internal_Shdr
*));
2997 if (i_shdrp
== NULL
)
3000 i_shdrp
[0] = bfd_zalloc (abfd
, sizeof (Elf_Internal_Shdr
));
3001 if (i_shdrp
[0] == NULL
)
3003 bfd_release (abfd
, i_shdrp
);
3007 elf_elfsections (abfd
) = i_shdrp
;
3009 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
3010 if (bfd_get_symcount (abfd
) > 0)
3012 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
3013 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3015 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
3016 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
3018 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
3019 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
3022 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
3024 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3028 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3029 if (d
->rel_idx
!= 0)
3030 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3031 if (d
->rel_idx2
!= 0)
3032 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3034 /* Fill in the sh_link and sh_info fields while we're at it. */
3036 /* sh_link of a reloc section is the section index of the symbol
3037 table. sh_info is the section index of the section to which
3038 the relocation entries apply. */
3039 if (d
->rel_idx
!= 0)
3041 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3042 d
->rel_hdr
.sh_info
= d
->this_idx
;
3044 if (d
->rel_idx2
!= 0)
3046 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3047 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3050 /* We need to set up sh_link for SHF_LINK_ORDER. */
3051 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3053 s
= elf_linked_to_section (sec
);
3056 /* elf_linked_to_section points to the input section. */
3057 if (link_info
!= NULL
)
3059 /* Check discarded linkonce section. */
3060 if (elf_discarded_section (s
))
3063 (*_bfd_error_handler
)
3064 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3065 abfd
, d
->this_hdr
.bfd_section
,
3067 /* Point to the kept section if it has the same
3068 size as the discarded one. */
3069 kept
= _bfd_elf_check_kept_section (s
);
3072 bfd_set_error (bfd_error_bad_value
);
3078 if (link_info
!= NULL
)
3080 /* Handle linker. */
3081 s
= s
->output_section
;
3082 BFD_ASSERT (s
!= NULL
);
3086 /* Handle objcopy. */
3087 if (s
->output_section
== NULL
)
3089 (*_bfd_error_handler
)
3090 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3091 abfd
, d
->this_hdr
.bfd_section
, s
, s
->owner
);
3092 bfd_set_error (bfd_error_bad_value
);
3095 s
= s
->output_section
;
3097 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3102 The Intel C compiler generates SHT_IA_64_UNWIND with
3103 SHF_LINK_ORDER. But it doesn't set the sh_link or
3104 sh_info fields. Hence we could get the situation
3106 const struct elf_backend_data
*bed
3107 = get_elf_backend_data (abfd
);
3108 if (bed
->link_order_error_handler
)
3109 bed
->link_order_error_handler
3110 (_("%B: warning: sh_link not set for section `%A'"),
3115 switch (d
->this_hdr
.sh_type
)
3119 /* A reloc section which we are treating as a normal BFD
3120 section. sh_link is the section index of the symbol
3121 table. sh_info is the section index of the section to
3122 which the relocation entries apply. We assume that an
3123 allocated reloc section uses the dynamic symbol table.
3124 FIXME: How can we be sure? */
3125 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3127 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3129 /* We look up the section the relocs apply to by name. */
3131 if (d
->this_hdr
.sh_type
== SHT_REL
)
3135 s
= bfd_get_section_by_name (abfd
, name
);
3137 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3141 /* We assume that a section named .stab*str is a stabs
3142 string section. We look for a section with the same name
3143 but without the trailing ``str'', and set its sh_link
3144 field to point to this section. */
3145 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3146 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3151 len
= strlen (sec
->name
);
3152 alc
= bfd_malloc (len
- 2);
3155 memcpy (alc
, sec
->name
, len
- 3);
3156 alc
[len
- 3] = '\0';
3157 s
= bfd_get_section_by_name (abfd
, alc
);
3161 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3163 /* This is a .stab section. */
3164 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3165 elf_section_data (s
)->this_hdr
.sh_entsize
3166 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3173 case SHT_GNU_verneed
:
3174 case SHT_GNU_verdef
:
3175 /* sh_link is the section header index of the string table
3176 used for the dynamic entries, or the symbol table, or the
3178 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3180 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3183 case SHT_GNU_LIBLIST
:
3184 /* sh_link is the section header index of the prelink library
3186 used for the dynamic entries, or the symbol table, or the
3188 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3189 ? ".dynstr" : ".gnu.libstr");
3191 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3195 case SHT_GNU_versym
:
3196 /* sh_link is the section header index of the symbol table
3197 this hash table or version table is for. */
3198 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3200 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3204 d
->this_hdr
.sh_link
= t
->symtab_section
;
3208 for (secn
= 1; secn
< section_number
; ++secn
)
3209 if (i_shdrp
[secn
] == NULL
)
3210 i_shdrp
[secn
] = i_shdrp
[0];
3212 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3213 i_shdrp
[secn
]->sh_name
);
3217 /* Map symbol from it's internal number to the external number, moving
3218 all local symbols to be at the head of the list. */
3221 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3223 /* If the backend has a special mapping, use it. */
3224 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3225 if (bed
->elf_backend_sym_is_global
)
3226 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3228 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3229 || bfd_is_und_section (bfd_get_section (sym
))
3230 || bfd_is_com_section (bfd_get_section (sym
)));
3234 elf_map_symbols (bfd
*abfd
)
3236 unsigned int symcount
= bfd_get_symcount (abfd
);
3237 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3238 asymbol
**sect_syms
;
3239 unsigned int num_locals
= 0;
3240 unsigned int num_globals
= 0;
3241 unsigned int num_locals2
= 0;
3242 unsigned int num_globals2
= 0;
3249 fprintf (stderr
, "elf_map_symbols\n");
3253 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3255 if (max_index
< asect
->index
)
3256 max_index
= asect
->index
;
3260 sect_syms
= bfd_zalloc2 (abfd
, max_index
, sizeof (asymbol
*));
3261 if (sect_syms
== NULL
)
3263 elf_section_syms (abfd
) = sect_syms
;
3264 elf_num_section_syms (abfd
) = max_index
;
3266 /* Init sect_syms entries for any section symbols we have already
3267 decided to output. */
3268 for (idx
= 0; idx
< symcount
; idx
++)
3270 asymbol
*sym
= syms
[idx
];
3272 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3279 if (sec
->owner
!= NULL
)
3281 if (sec
->owner
!= abfd
)
3283 if (sec
->output_offset
!= 0)
3286 sec
= sec
->output_section
;
3288 /* Empty sections in the input files may have had a
3289 section symbol created for them. (See the comment
3290 near the end of _bfd_generic_link_output_symbols in
3291 linker.c). If the linker script discards such
3292 sections then we will reach this point. Since we know
3293 that we cannot avoid this case, we detect it and skip
3294 the abort and the assignment to the sect_syms array.
3295 To reproduce this particular case try running the
3296 linker testsuite test ld-scripts/weak.exp for an ELF
3297 port that uses the generic linker. */
3298 if (sec
->owner
== NULL
)
3301 BFD_ASSERT (sec
->owner
== abfd
);
3303 sect_syms
[sec
->index
] = syms
[idx
];
3308 /* Classify all of the symbols. */
3309 for (idx
= 0; idx
< symcount
; idx
++)
3311 if (!sym_is_global (abfd
, syms
[idx
]))
3317 /* We will be adding a section symbol for each BFD section. Most normal
3318 sections will already have a section symbol in outsymbols, but
3319 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3320 at least in that case. */
3321 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3323 if (sect_syms
[asect
->index
] == NULL
)
3325 if (!sym_is_global (abfd
, asect
->symbol
))
3332 /* Now sort the symbols so the local symbols are first. */
3333 new_syms
= bfd_alloc2 (abfd
, num_locals
+ num_globals
, sizeof (asymbol
*));
3335 if (new_syms
== NULL
)
3338 for (idx
= 0; idx
< symcount
; idx
++)
3340 asymbol
*sym
= syms
[idx
];
3343 if (!sym_is_global (abfd
, sym
))
3346 i
= num_locals
+ num_globals2
++;
3348 sym
->udata
.i
= i
+ 1;
3350 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3352 if (sect_syms
[asect
->index
] == NULL
)
3354 asymbol
*sym
= asect
->symbol
;
3357 sect_syms
[asect
->index
] = sym
;
3358 if (!sym_is_global (abfd
, sym
))
3361 i
= num_locals
+ num_globals2
++;
3363 sym
->udata
.i
= i
+ 1;
3367 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3369 elf_num_locals (abfd
) = num_locals
;
3370 elf_num_globals (abfd
) = num_globals
;
3374 /* Align to the maximum file alignment that could be required for any
3375 ELF data structure. */
3377 static inline file_ptr
3378 align_file_position (file_ptr off
, int align
)
3380 return (off
+ align
- 1) & ~(align
- 1);
3383 /* Assign a file position to a section, optionally aligning to the
3384 required section alignment. */
3387 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3395 al
= i_shdrp
->sh_addralign
;
3397 offset
= BFD_ALIGN (offset
, al
);
3399 i_shdrp
->sh_offset
= offset
;
3400 if (i_shdrp
->bfd_section
!= NULL
)
3401 i_shdrp
->bfd_section
->filepos
= offset
;
3402 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3403 offset
+= i_shdrp
->sh_size
;
3407 /* Compute the file positions we are going to put the sections at, and
3408 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3409 is not NULL, this is being called by the ELF backend linker. */
3412 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3413 struct bfd_link_info
*link_info
)
3415 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3417 struct bfd_strtab_hash
*strtab
= NULL
;
3418 Elf_Internal_Shdr
*shstrtab_hdr
;
3420 if (abfd
->output_has_begun
)
3423 /* Do any elf backend specific processing first. */
3424 if (bed
->elf_backend_begin_write_processing
)
3425 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3427 if (! prep_headers (abfd
))
3430 /* Post process the headers if necessary. */
3431 if (bed
->elf_backend_post_process_headers
)
3432 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3435 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3439 if (!assign_section_numbers (abfd
, link_info
))
3442 /* The backend linker builds symbol table information itself. */
3443 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3445 /* Non-zero if doing a relocatable link. */
3446 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3448 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3452 if (link_info
== NULL
)
3454 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3459 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3460 /* sh_name was set in prep_headers. */
3461 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3462 shstrtab_hdr
->sh_flags
= 0;
3463 shstrtab_hdr
->sh_addr
= 0;
3464 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3465 shstrtab_hdr
->sh_entsize
= 0;
3466 shstrtab_hdr
->sh_link
= 0;
3467 shstrtab_hdr
->sh_info
= 0;
3468 /* sh_offset is set in assign_file_positions_except_relocs. */
3469 shstrtab_hdr
->sh_addralign
= 1;
3471 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3474 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3477 Elf_Internal_Shdr
*hdr
;
3479 off
= elf_tdata (abfd
)->next_file_pos
;
3481 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3482 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3484 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3485 if (hdr
->sh_size
!= 0)
3486 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3488 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3489 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3491 elf_tdata (abfd
)->next_file_pos
= off
;
3493 /* Now that we know where the .strtab section goes, write it
3495 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3496 || ! _bfd_stringtab_emit (abfd
, strtab
))
3498 _bfd_stringtab_free (strtab
);
3501 abfd
->output_has_begun
= TRUE
;
3506 /* Create a mapping from a set of sections to a program segment. */
3508 static struct elf_segment_map
*
3509 make_mapping (bfd
*abfd
,
3510 asection
**sections
,
3515 struct elf_segment_map
*m
;
3520 amt
= sizeof (struct elf_segment_map
);
3521 amt
+= (to
- from
- 1) * sizeof (asection
*);
3522 m
= bfd_zalloc (abfd
, amt
);
3526 m
->p_type
= PT_LOAD
;
3527 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3528 m
->sections
[i
- from
] = *hdrpp
;
3529 m
->count
= to
- from
;
3531 if (from
== 0 && phdr
)
3533 /* Include the headers in the first PT_LOAD segment. */
3534 m
->includes_filehdr
= 1;
3535 m
->includes_phdrs
= 1;
3541 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3544 struct elf_segment_map
*
3545 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3547 struct elf_segment_map
*m
;
3549 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3553 m
->p_type
= PT_DYNAMIC
;
3555 m
->sections
[0] = dynsec
;
3560 /* Set up a mapping from BFD sections to program segments. */
3563 map_sections_to_segments (bfd
*abfd
)
3565 asection
**sections
= NULL
;
3569 struct elf_segment_map
*mfirst
;
3570 struct elf_segment_map
**pm
;
3571 struct elf_segment_map
*m
;
3574 unsigned int phdr_index
;
3575 bfd_vma maxpagesize
;
3577 bfd_boolean phdr_in_segment
= TRUE
;
3578 bfd_boolean writable
;
3580 asection
*first_tls
= NULL
;
3581 asection
*dynsec
, *eh_frame_hdr
;
3584 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3587 if (bfd_count_sections (abfd
) == 0)
3590 /* Select the allocated sections, and sort them. */
3592 sections
= bfd_malloc2 (bfd_count_sections (abfd
), sizeof (asection
*));
3593 if (sections
== NULL
)
3597 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3599 if ((s
->flags
& SEC_ALLOC
) != 0)
3605 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3608 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3610 /* Build the mapping. */
3615 /* If we have a .interp section, then create a PT_PHDR segment for
3616 the program headers and a PT_INTERP segment for the .interp
3618 s
= bfd_get_section_by_name (abfd
, ".interp");
3619 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3621 amt
= sizeof (struct elf_segment_map
);
3622 m
= bfd_zalloc (abfd
, amt
);
3626 m
->p_type
= PT_PHDR
;
3627 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3628 m
->p_flags
= PF_R
| PF_X
;
3629 m
->p_flags_valid
= 1;
3630 m
->includes_phdrs
= 1;
3635 amt
= sizeof (struct elf_segment_map
);
3636 m
= bfd_zalloc (abfd
, amt
);
3640 m
->p_type
= PT_INTERP
;
3648 /* Look through the sections. We put sections in the same program
3649 segment when the start of the second section can be placed within
3650 a few bytes of the end of the first section. */
3654 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3656 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3658 && (dynsec
->flags
& SEC_LOAD
) == 0)
3661 /* Deal with -Ttext or something similar such that the first section
3662 is not adjacent to the program headers. This is an
3663 approximation, since at this point we don't know exactly how many
3664 program headers we will need. */
3667 bfd_size_type phdr_size
;
3669 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3671 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3672 if ((abfd
->flags
& D_PAGED
) == 0
3673 || sections
[0]->lma
< phdr_size
3674 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3675 phdr_in_segment
= FALSE
;
3678 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3681 bfd_boolean new_segment
;
3685 /* See if this section and the last one will fit in the same
3688 if (last_hdr
== NULL
)
3690 /* If we don't have a segment yet, then we don't need a new
3691 one (we build the last one after this loop). */
3692 new_segment
= FALSE
;
3694 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3696 /* If this section has a different relation between the
3697 virtual address and the load address, then we need a new
3701 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3702 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3704 /* If putting this section in this segment would force us to
3705 skip a page in the segment, then we need a new segment. */
3708 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3709 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3711 /* We don't want to put a loadable section after a
3712 nonloadable section in the same segment.
3713 Consider .tbss sections as loadable for this purpose. */
3716 else if ((abfd
->flags
& D_PAGED
) == 0)
3718 /* If the file is not demand paged, which means that we
3719 don't require the sections to be correctly aligned in the
3720 file, then there is no other reason for a new segment. */
3721 new_segment
= FALSE
;
3724 && (hdr
->flags
& SEC_READONLY
) == 0
3725 && (((last_hdr
->lma
+ last_size
- 1)
3726 & ~(maxpagesize
- 1))
3727 != (hdr
->lma
& ~(maxpagesize
- 1))))
3729 /* We don't want to put a writable section in a read only
3730 segment, unless they are on the same page in memory
3731 anyhow. We already know that the last section does not
3732 bring us past the current section on the page, so the
3733 only case in which the new section is not on the same
3734 page as the previous section is when the previous section
3735 ends precisely on a page boundary. */
3740 /* Otherwise, we can use the same segment. */
3741 new_segment
= FALSE
;
3746 if ((hdr
->flags
& SEC_READONLY
) == 0)
3749 /* .tbss sections effectively have zero size. */
3750 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3751 last_size
= hdr
->size
;
3757 /* We need a new program segment. We must create a new program
3758 header holding all the sections from phdr_index until hdr. */
3760 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3767 if ((hdr
->flags
& SEC_READONLY
) == 0)
3773 /* .tbss sections effectively have zero size. */
3774 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3775 last_size
= hdr
->size
;
3779 phdr_in_segment
= FALSE
;
3782 /* Create a final PT_LOAD program segment. */
3783 if (last_hdr
!= NULL
)
3785 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3793 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3796 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3803 /* For each loadable .note section, add a PT_NOTE segment. We don't
3804 use bfd_get_section_by_name, because if we link together
3805 nonloadable .note sections and loadable .note sections, we will
3806 generate two .note sections in the output file. FIXME: Using
3807 names for section types is bogus anyhow. */
3808 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3810 if ((s
->flags
& SEC_LOAD
) != 0
3811 && strncmp (s
->name
, ".note", 5) == 0)
3813 amt
= sizeof (struct elf_segment_map
);
3814 m
= bfd_zalloc (abfd
, amt
);
3818 m
->p_type
= PT_NOTE
;
3825 if (s
->flags
& SEC_THREAD_LOCAL
)
3833 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3838 amt
= sizeof (struct elf_segment_map
);
3839 amt
+= (tls_count
- 1) * sizeof (asection
*);
3840 m
= bfd_zalloc (abfd
, amt
);
3845 m
->count
= tls_count
;
3846 /* Mandated PF_R. */
3848 m
->p_flags_valid
= 1;
3849 for (i
= 0; i
< tls_count
; ++i
)
3851 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3852 m
->sections
[i
] = first_tls
;
3853 first_tls
= first_tls
->next
;
3860 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3862 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3863 if (eh_frame_hdr
!= NULL
3864 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3866 amt
= sizeof (struct elf_segment_map
);
3867 m
= bfd_zalloc (abfd
, amt
);
3871 m
->p_type
= PT_GNU_EH_FRAME
;
3873 m
->sections
[0] = eh_frame_hdr
->output_section
;
3879 if (elf_tdata (abfd
)->stack_flags
)
3881 amt
= sizeof (struct elf_segment_map
);
3882 m
= bfd_zalloc (abfd
, amt
);
3886 m
->p_type
= PT_GNU_STACK
;
3887 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3888 m
->p_flags_valid
= 1;
3894 if (elf_tdata (abfd
)->relro
)
3896 amt
= sizeof (struct elf_segment_map
);
3897 m
= bfd_zalloc (abfd
, amt
);
3901 m
->p_type
= PT_GNU_RELRO
;
3903 m
->p_flags_valid
= 1;
3912 elf_tdata (abfd
)->segment_map
= mfirst
;
3916 if (sections
!= NULL
)
3921 /* Sort sections by address. */
3924 elf_sort_sections (const void *arg1
, const void *arg2
)
3926 const asection
*sec1
= *(const asection
**) arg1
;
3927 const asection
*sec2
= *(const asection
**) arg2
;
3928 bfd_size_type size1
, size2
;
3930 /* Sort by LMA first, since this is the address used to
3931 place the section into a segment. */
3932 if (sec1
->lma
< sec2
->lma
)
3934 else if (sec1
->lma
> sec2
->lma
)
3937 /* Then sort by VMA. Normally the LMA and the VMA will be
3938 the same, and this will do nothing. */
3939 if (sec1
->vma
< sec2
->vma
)
3941 else if (sec1
->vma
> sec2
->vma
)
3944 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3946 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3952 /* If the indicies are the same, do not return 0
3953 here, but continue to try the next comparison. */
3954 if (sec1
->target_index
- sec2
->target_index
!= 0)
3955 return sec1
->target_index
- sec2
->target_index
;
3960 else if (TOEND (sec2
))
3965 /* Sort by size, to put zero sized sections
3966 before others at the same address. */
3968 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3969 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3976 return sec1
->target_index
- sec2
->target_index
;
3979 /* Ian Lance Taylor writes:
3981 We shouldn't be using % with a negative signed number. That's just
3982 not good. We have to make sure either that the number is not
3983 negative, or that the number has an unsigned type. When the types
3984 are all the same size they wind up as unsigned. When file_ptr is a
3985 larger signed type, the arithmetic winds up as signed long long,
3988 What we're trying to say here is something like ``increase OFF by
3989 the least amount that will cause it to be equal to the VMA modulo
3991 /* In other words, something like:
3993 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3994 off_offset = off % bed->maxpagesize;
3995 if (vma_offset < off_offset)
3996 adjustment = vma_offset + bed->maxpagesize - off_offset;
3998 adjustment = vma_offset - off_offset;
4000 which can can be collapsed into the expression below. */
4003 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
4005 return ((vma
- off
) % maxpagesize
);
4008 /* Assign file positions to the sections based on the mapping from
4009 sections to segments. This function also sets up some fields in
4010 the file header, and writes out the program headers. */
4013 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
4015 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4017 struct elf_segment_map
*m
;
4019 Elf_Internal_Phdr
*phdrs
;
4021 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4022 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4023 Elf_Internal_Phdr
*p
;
4025 if (elf_tdata (abfd
)->segment_map
== NULL
)
4027 if (! map_sections_to_segments (abfd
))
4032 /* The placement algorithm assumes that non allocated sections are
4033 not in PT_LOAD segments. We ensure this here by removing such
4034 sections from the segment map. We also remove excluded
4036 for (m
= elf_tdata (abfd
)->segment_map
;
4040 unsigned int new_count
;
4044 for (i
= 0; i
< m
->count
; i
++)
4046 if ((m
->sections
[i
]->flags
& SEC_EXCLUDE
) == 0
4047 && ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0
4048 || m
->p_type
!= PT_LOAD
))
4051 m
->sections
[new_count
] = m
->sections
[i
];
4057 if (new_count
!= m
->count
)
4058 m
->count
= new_count
;
4062 if (bed
->elf_backend_modify_segment_map
)
4064 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4069 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4072 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4073 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4074 elf_elfheader (abfd
)->e_phnum
= count
;
4078 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4082 /* If we already counted the number of program segments, make sure
4083 that we allocated enough space. This happens when SIZEOF_HEADERS
4084 is used in a linker script. */
4085 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4086 if (alloc
!= 0 && count
> alloc
)
4088 ((*_bfd_error_handler
)
4089 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4090 abfd
, alloc
, count
));
4091 bfd_set_error (bfd_error_bad_value
);
4098 phdrs
= bfd_alloc2 (abfd
, alloc
, sizeof (Elf_Internal_Phdr
));
4102 off
= bed
->s
->sizeof_ehdr
;
4103 off
+= alloc
* bed
->s
->sizeof_phdr
;
4110 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4117 /* If elf_segment_map is not from map_sections_to_segments, the
4118 sections may not be correctly ordered. NOTE: sorting should
4119 not be done to the PT_NOTE section of a corefile, which may
4120 contain several pseudo-sections artificially created by bfd.
4121 Sorting these pseudo-sections breaks things badly. */
4123 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4124 && m
->p_type
== PT_NOTE
))
4125 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4128 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4129 number of sections with contents contributing to both p_filesz
4130 and p_memsz, followed by a number of sections with no contents
4131 that just contribute to p_memsz. In this loop, OFF tracks next
4132 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4133 an adjustment we use for segments that have no file contents
4134 but need zero filled memory allocation. */
4136 p
->p_type
= m
->p_type
;
4137 p
->p_flags
= m
->p_flags
;
4139 if (p
->p_type
== PT_LOAD
4142 bfd_size_type align
;
4144 unsigned int align_power
= 0;
4146 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4148 unsigned int secalign
;
4150 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4151 if (secalign
> align_power
)
4152 align_power
= secalign
;
4154 align
= (bfd_size_type
) 1 << align_power
;
4156 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> align
)
4157 align
= bed
->maxpagesize
;
4159 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4162 && !m
->includes_filehdr
4163 && !m
->includes_phdrs
4164 && (ufile_ptr
) off
>= align
)
4166 /* If the first section isn't loadable, the same holds for
4167 any other sections. Since the segment won't need file
4168 space, we can make p_offset overlap some prior segment.
4169 However, .tbss is special. If a segment starts with
4170 .tbss, we need to look at the next section to decide
4171 whether the segment has any loadable sections. */
4173 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4175 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4179 voff
= adjust
- align
;
4185 /* Make sure the .dynamic section is the first section in the
4186 PT_DYNAMIC segment. */
4187 else if (p
->p_type
== PT_DYNAMIC
4189 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4192 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4194 bfd_set_error (bfd_error_bad_value
);
4201 p
->p_vaddr
= m
->sections
[0]->vma
;
4203 if (m
->p_paddr_valid
)
4204 p
->p_paddr
= m
->p_paddr
;
4205 else if (m
->count
== 0)
4208 p
->p_paddr
= m
->sections
[0]->lma
;
4210 if (p
->p_type
== PT_LOAD
4211 && (abfd
->flags
& D_PAGED
) != 0)
4212 p
->p_align
= bed
->maxpagesize
;
4213 else if (m
->count
== 0)
4214 p
->p_align
= 1 << bed
->s
->log_file_align
;
4222 if (m
->includes_filehdr
)
4224 if (! m
->p_flags_valid
)
4227 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4228 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4231 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4233 if (p
->p_vaddr
< (bfd_vma
) off
)
4235 (*_bfd_error_handler
)
4236 (_("%B: Not enough room for program headers, try linking with -N"),
4238 bfd_set_error (bfd_error_bad_value
);
4243 if (! m
->p_paddr_valid
)
4246 if (p
->p_type
== PT_LOAD
)
4248 filehdr_vaddr
= p
->p_vaddr
;
4249 filehdr_paddr
= p
->p_paddr
;
4253 if (m
->includes_phdrs
)
4255 if (! m
->p_flags_valid
)
4258 if (m
->includes_filehdr
)
4260 if (p
->p_type
== PT_LOAD
)
4262 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4263 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4268 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4272 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4273 p
->p_vaddr
-= off
- p
->p_offset
;
4274 if (! m
->p_paddr_valid
)
4275 p
->p_paddr
-= off
- p
->p_offset
;
4278 if (p
->p_type
== PT_LOAD
)
4280 phdrs_vaddr
= p
->p_vaddr
;
4281 phdrs_paddr
= p
->p_paddr
;
4284 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4287 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4288 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4291 if (p
->p_type
== PT_LOAD
4292 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4294 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4295 p
->p_offset
= off
+ voff
;
4300 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4301 p
->p_filesz
+= adjust
;
4302 p
->p_memsz
+= adjust
;
4306 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4310 bfd_size_type align
;
4314 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4316 if (p
->p_type
== PT_LOAD
4317 || p
->p_type
== PT_TLS
)
4319 bfd_signed_vma adjust
;
4321 if ((flags
& SEC_LOAD
) != 0)
4323 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4326 (*_bfd_error_handler
)
4327 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4328 abfd
, sec
, (unsigned long) sec
->lma
);
4332 p
->p_filesz
+= adjust
;
4333 p
->p_memsz
+= adjust
;
4335 /* .tbss is special. It doesn't contribute to p_memsz of
4337 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4338 || p
->p_type
== PT_TLS
)
4340 /* The section VMA must equal the file position
4341 modulo the page size. */
4342 bfd_size_type page
= align
;
4343 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> page
)
4344 page
= bed
->maxpagesize
;
4345 adjust
= vma_page_aligned_bias (sec
->vma
,
4346 p
->p_vaddr
+ p
->p_memsz
,
4348 p
->p_memsz
+= adjust
;
4352 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4354 /* The section at i == 0 is the one that actually contains
4360 p
->p_filesz
= sec
->size
;
4366 /* The rest are fake sections that shouldn't be written. */
4375 if (p
->p_type
== PT_LOAD
)
4378 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4379 1997, and the exact reason for it isn't clear. One
4380 plausible explanation is that it is to work around
4381 a problem we have with linker scripts using data
4382 statements in NOLOAD sections. I don't think it
4383 makes a great deal of sense to have such a section
4384 assigned to a PT_LOAD segment, but apparently
4385 people do this. The data statement results in a
4386 bfd_data_link_order being built, and these need
4387 section contents to write into. Eventually, we get
4388 to _bfd_elf_write_object_contents which writes any
4389 section with contents to the output. Make room
4390 here for the write, so that following segments are
4392 if ((flags
& SEC_LOAD
) != 0
4393 || (flags
& SEC_HAS_CONTENTS
) != 0)
4397 if ((flags
& SEC_LOAD
) != 0)
4399 p
->p_filesz
+= sec
->size
;
4400 p
->p_memsz
+= sec
->size
;
4402 /* PR ld/594: Sections in note segments which are not loaded
4403 contribute to the file size but not the in-memory size. */
4404 else if (p
->p_type
== PT_NOTE
4405 && (flags
& SEC_HAS_CONTENTS
) != 0)
4406 p
->p_filesz
+= sec
->size
;
4408 /* .tbss is special. It doesn't contribute to p_memsz of
4410 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4411 || p
->p_type
== PT_TLS
)
4412 p
->p_memsz
+= sec
->size
;
4414 if (p
->p_type
== PT_TLS
4416 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4418 struct bfd_link_order
*o
= sec
->map_tail
.link_order
;
4420 p
->p_memsz
+= o
->offset
+ o
->size
;
4423 if (align
> p
->p_align
4424 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4428 if (! m
->p_flags_valid
)
4431 if ((flags
& SEC_CODE
) != 0)
4433 if ((flags
& SEC_READONLY
) == 0)
4439 /* Now that we have set the section file positions, we can set up
4440 the file positions for the non PT_LOAD segments. */
4441 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4445 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4447 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4448 /* If the section has not yet been assigned a file position,
4449 do so now. The ARM BPABI requires that .dynamic section
4450 not be marked SEC_ALLOC because it is not part of any
4451 PT_LOAD segment, so it will not be processed above. */
4452 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4455 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4458 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4460 off
= (_bfd_elf_assign_file_position_for_section
4461 (i_shdrpp
[i
], off
, TRUE
));
4462 p
->p_filesz
= m
->sections
[0]->size
;
4464 p
->p_offset
= m
->sections
[0]->filepos
;
4468 if (m
->includes_filehdr
)
4470 p
->p_vaddr
= filehdr_vaddr
;
4471 if (! m
->p_paddr_valid
)
4472 p
->p_paddr
= filehdr_paddr
;
4474 else if (m
->includes_phdrs
)
4476 p
->p_vaddr
= phdrs_vaddr
;
4477 if (! m
->p_paddr_valid
)
4478 p
->p_paddr
= phdrs_paddr
;
4480 else if (p
->p_type
== PT_GNU_RELRO
)
4482 Elf_Internal_Phdr
*lp
;
4484 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4486 if (lp
->p_type
== PT_LOAD
4487 && lp
->p_vaddr
<= link_info
->relro_end
4488 && lp
->p_vaddr
>= link_info
->relro_start
4489 && lp
->p_vaddr
+ lp
->p_filesz
4490 >= link_info
->relro_end
)
4494 if (lp
< phdrs
+ count
4495 && link_info
->relro_end
> lp
->p_vaddr
)
4497 p
->p_vaddr
= lp
->p_vaddr
;
4498 p
->p_paddr
= lp
->p_paddr
;
4499 p
->p_offset
= lp
->p_offset
;
4500 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4501 p
->p_memsz
= p
->p_filesz
;
4503 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4507 memset (p
, 0, sizeof *p
);
4508 p
->p_type
= PT_NULL
;
4514 /* Clear out any program headers we allocated but did not use. */
4515 for (; count
< alloc
; count
++, p
++)
4517 memset (p
, 0, sizeof *p
);
4518 p
->p_type
= PT_NULL
;
4521 elf_tdata (abfd
)->phdr
= phdrs
;
4523 elf_tdata (abfd
)->next_file_pos
= off
;
4525 /* Write out the program headers. */
4526 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4527 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4533 /* Get the size of the program header.
4535 If this is called by the linker before any of the section VMA's are set, it
4536 can't calculate the correct value for a strange memory layout. This only
4537 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4538 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4539 data segment (exclusive of .interp and .dynamic).
4541 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4542 will be two segments. */
4544 static bfd_size_type
4545 get_program_header_size (bfd
*abfd
)
4549 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4551 /* We can't return a different result each time we're called. */
4552 if (elf_tdata (abfd
)->program_header_size
!= 0)
4553 return elf_tdata (abfd
)->program_header_size
;
4555 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4557 struct elf_segment_map
*m
;
4560 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4562 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4563 return elf_tdata (abfd
)->program_header_size
;
4566 /* Assume we will need exactly two PT_LOAD segments: one for text
4567 and one for data. */
4570 s
= bfd_get_section_by_name (abfd
, ".interp");
4571 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4573 /* If we have a loadable interpreter section, we need a
4574 PT_INTERP segment. In this case, assume we also need a
4575 PT_PHDR segment, although that may not be true for all
4580 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4582 /* We need a PT_DYNAMIC segment. */
4586 if (elf_tdata (abfd
)->eh_frame_hdr
)
4588 /* We need a PT_GNU_EH_FRAME segment. */
4592 if (elf_tdata (abfd
)->stack_flags
)
4594 /* We need a PT_GNU_STACK segment. */
4598 if (elf_tdata (abfd
)->relro
)
4600 /* We need a PT_GNU_RELRO segment. */
4604 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4606 if ((s
->flags
& SEC_LOAD
) != 0
4607 && strncmp (s
->name
, ".note", 5) == 0)
4609 /* We need a PT_NOTE segment. */
4614 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4616 if (s
->flags
& SEC_THREAD_LOCAL
)
4618 /* We need a PT_TLS segment. */
4624 /* Let the backend count up any program headers it might need. */
4625 if (bed
->elf_backend_additional_program_headers
)
4629 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4635 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4636 return elf_tdata (abfd
)->program_header_size
;
4639 /* Work out the file positions of all the sections. This is called by
4640 _bfd_elf_compute_section_file_positions. All the section sizes and
4641 VMAs must be known before this is called.
4643 Reloc sections come in two flavours: Those processed specially as
4644 "side-channel" data attached to a section to which they apply, and
4645 those that bfd doesn't process as relocations. The latter sort are
4646 stored in a normal bfd section by bfd_section_from_shdr. We don't
4647 consider the former sort here, unless they form part of the loadable
4648 image. Reloc sections not assigned here will be handled later by
4649 assign_file_positions_for_relocs.
4651 We also don't set the positions of the .symtab and .strtab here. */
4654 assign_file_positions_except_relocs (bfd
*abfd
,
4655 struct bfd_link_info
*link_info
)
4657 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4658 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4659 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4660 unsigned int num_sec
= elf_numsections (abfd
);
4662 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4664 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4665 && bfd_get_format (abfd
) != bfd_core
)
4667 Elf_Internal_Shdr
**hdrpp
;
4670 /* Start after the ELF header. */
4671 off
= i_ehdrp
->e_ehsize
;
4673 /* We are not creating an executable, which means that we are
4674 not creating a program header, and that the actual order of
4675 the sections in the file is unimportant. */
4676 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4678 Elf_Internal_Shdr
*hdr
;
4681 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4682 && hdr
->bfd_section
== NULL
)
4683 || i
== tdata
->symtab_section
4684 || i
== tdata
->symtab_shndx_section
4685 || i
== tdata
->strtab_section
)
4687 hdr
->sh_offset
= -1;
4690 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4692 if (i
== SHN_LORESERVE
- 1)
4694 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4695 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4702 Elf_Internal_Shdr
**hdrpp
;
4704 /* Assign file positions for the loaded sections based on the
4705 assignment of sections to segments. */
4706 if (! assign_file_positions_for_segments (abfd
, link_info
))
4709 /* Assign file positions for the other sections. */
4711 off
= elf_tdata (abfd
)->next_file_pos
;
4712 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4714 Elf_Internal_Shdr
*hdr
;
4717 if (hdr
->bfd_section
!= NULL
4718 && hdr
->bfd_section
->filepos
!= 0)
4719 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4720 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4722 ((*_bfd_error_handler
)
4723 (_("%B: warning: allocated section `%s' not in segment"),
4725 (hdr
->bfd_section
== NULL
4727 : hdr
->bfd_section
->name
)));
4728 if ((abfd
->flags
& D_PAGED
) != 0)
4729 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4732 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4734 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4737 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4738 && hdr
->bfd_section
== NULL
)
4739 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4740 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4741 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4742 hdr
->sh_offset
= -1;
4744 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4746 if (i
== SHN_LORESERVE
- 1)
4748 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4749 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4754 /* Place the section headers. */
4755 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4756 i_ehdrp
->e_shoff
= off
;
4757 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4759 elf_tdata (abfd
)->next_file_pos
= off
;
4765 prep_headers (bfd
*abfd
)
4767 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4768 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4769 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4770 struct elf_strtab_hash
*shstrtab
;
4771 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4773 i_ehdrp
= elf_elfheader (abfd
);
4774 i_shdrp
= elf_elfsections (abfd
);
4776 shstrtab
= _bfd_elf_strtab_init ();
4777 if (shstrtab
== NULL
)
4780 elf_shstrtab (abfd
) = shstrtab
;
4782 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4783 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4784 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4785 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4787 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4788 i_ehdrp
->e_ident
[EI_DATA
] =
4789 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4790 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4792 if ((abfd
->flags
& DYNAMIC
) != 0)
4793 i_ehdrp
->e_type
= ET_DYN
;
4794 else if ((abfd
->flags
& EXEC_P
) != 0)
4795 i_ehdrp
->e_type
= ET_EXEC
;
4796 else if (bfd_get_format (abfd
) == bfd_core
)
4797 i_ehdrp
->e_type
= ET_CORE
;
4799 i_ehdrp
->e_type
= ET_REL
;
4801 switch (bfd_get_arch (abfd
))
4803 case bfd_arch_unknown
:
4804 i_ehdrp
->e_machine
= EM_NONE
;
4807 /* There used to be a long list of cases here, each one setting
4808 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4809 in the corresponding bfd definition. To avoid duplication,
4810 the switch was removed. Machines that need special handling
4811 can generally do it in elf_backend_final_write_processing(),
4812 unless they need the information earlier than the final write.
4813 Such need can generally be supplied by replacing the tests for
4814 e_machine with the conditions used to determine it. */
4816 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4819 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4820 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4822 /* No program header, for now. */
4823 i_ehdrp
->e_phoff
= 0;
4824 i_ehdrp
->e_phentsize
= 0;
4825 i_ehdrp
->e_phnum
= 0;
4827 /* Each bfd section is section header entry. */
4828 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4829 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4831 /* If we're building an executable, we'll need a program header table. */
4832 if (abfd
->flags
& EXEC_P
)
4833 /* It all happens later. */
4837 i_ehdrp
->e_phentsize
= 0;
4839 i_ehdrp
->e_phoff
= 0;
4842 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4843 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4844 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4845 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4846 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4847 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4848 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4849 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4850 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4856 /* Assign file positions for all the reloc sections which are not part
4857 of the loadable file image. */
4860 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4863 unsigned int i
, num_sec
;
4864 Elf_Internal_Shdr
**shdrpp
;
4866 off
= elf_tdata (abfd
)->next_file_pos
;
4868 num_sec
= elf_numsections (abfd
);
4869 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4871 Elf_Internal_Shdr
*shdrp
;
4874 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4875 && shdrp
->sh_offset
== -1)
4876 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4879 elf_tdata (abfd
)->next_file_pos
= off
;
4883 _bfd_elf_write_object_contents (bfd
*abfd
)
4885 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4886 Elf_Internal_Ehdr
*i_ehdrp
;
4887 Elf_Internal_Shdr
**i_shdrp
;
4889 unsigned int count
, num_sec
;
4891 if (! abfd
->output_has_begun
4892 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4895 i_shdrp
= elf_elfsections (abfd
);
4896 i_ehdrp
= elf_elfheader (abfd
);
4899 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4903 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4905 /* After writing the headers, we need to write the sections too... */
4906 num_sec
= elf_numsections (abfd
);
4907 for (count
= 1; count
< num_sec
; count
++)
4909 if (bed
->elf_backend_section_processing
)
4910 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4911 if (i_shdrp
[count
]->contents
)
4913 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4915 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4916 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4919 if (count
== SHN_LORESERVE
- 1)
4920 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4923 /* Write out the section header names. */
4924 if (elf_shstrtab (abfd
) != NULL
4925 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4926 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4929 if (bed
->elf_backend_final_write_processing
)
4930 (*bed
->elf_backend_final_write_processing
) (abfd
,
4931 elf_tdata (abfd
)->linker
);
4933 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4937 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4939 /* Hopefully this can be done just like an object file. */
4940 return _bfd_elf_write_object_contents (abfd
);
4943 /* Given a section, search the header to find them. */
4946 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4948 const struct elf_backend_data
*bed
;
4951 if (elf_section_data (asect
) != NULL
4952 && elf_section_data (asect
)->this_idx
!= 0)
4953 return elf_section_data (asect
)->this_idx
;
4955 if (bfd_is_abs_section (asect
))
4957 else if (bfd_is_com_section (asect
))
4959 else if (bfd_is_und_section (asect
))
4964 bed
= get_elf_backend_data (abfd
);
4965 if (bed
->elf_backend_section_from_bfd_section
)
4969 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4974 bfd_set_error (bfd_error_nonrepresentable_section
);
4979 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4983 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4985 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4987 flagword flags
= asym_ptr
->flags
;
4989 /* When gas creates relocations against local labels, it creates its
4990 own symbol for the section, but does put the symbol into the
4991 symbol chain, so udata is 0. When the linker is generating
4992 relocatable output, this section symbol may be for one of the
4993 input sections rather than the output section. */
4994 if (asym_ptr
->udata
.i
== 0
4995 && (flags
& BSF_SECTION_SYM
)
4996 && asym_ptr
->section
)
5000 if (asym_ptr
->section
->output_section
!= NULL
)
5001 indx
= asym_ptr
->section
->output_section
->index
;
5003 indx
= asym_ptr
->section
->index
;
5004 if (indx
< elf_num_section_syms (abfd
)
5005 && elf_section_syms (abfd
)[indx
] != NULL
)
5006 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
5009 idx
= asym_ptr
->udata
.i
;
5013 /* This case can occur when using --strip-symbol on a symbol
5014 which is used in a relocation entry. */
5015 (*_bfd_error_handler
)
5016 (_("%B: symbol `%s' required but not present"),
5017 abfd
, bfd_asymbol_name (asym_ptr
));
5018 bfd_set_error (bfd_error_no_symbols
);
5025 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5026 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5027 elf_symbol_flags (flags
));
5035 /* Copy private BFD data. This copies any program header information. */
5038 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5040 Elf_Internal_Ehdr
*iehdr
;
5041 struct elf_segment_map
*map
;
5042 struct elf_segment_map
*map_first
;
5043 struct elf_segment_map
**pointer_to_map
;
5044 Elf_Internal_Phdr
*segment
;
5047 unsigned int num_segments
;
5048 bfd_boolean phdr_included
= FALSE
;
5049 bfd_vma maxpagesize
;
5050 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5051 unsigned int phdr_adjust_num
= 0;
5052 const struct elf_backend_data
*bed
;
5054 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5055 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5058 if (elf_tdata (ibfd
)->phdr
== NULL
)
5061 bed
= get_elf_backend_data (ibfd
);
5062 iehdr
= elf_elfheader (ibfd
);
5065 pointer_to_map
= &map_first
;
5067 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5068 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5070 /* Returns the end address of the segment + 1. */
5071 #define SEGMENT_END(segment, start) \
5072 (start + (segment->p_memsz > segment->p_filesz \
5073 ? segment->p_memsz : segment->p_filesz))
5075 #define SECTION_SIZE(section, segment) \
5076 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5077 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5078 ? section->size : 0)
5080 /* Returns TRUE if the given section is contained within
5081 the given segment. VMA addresses are compared. */
5082 #define IS_CONTAINED_BY_VMA(section, segment) \
5083 (section->vma >= segment->p_vaddr \
5084 && (section->vma + SECTION_SIZE (section, segment) \
5085 <= (SEGMENT_END (segment, segment->p_vaddr))))
5087 /* Returns TRUE if the given section is contained within
5088 the given segment. LMA addresses are compared. */
5089 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5090 (section->lma >= base \
5091 && (section->lma + SECTION_SIZE (section, segment) \
5092 <= SEGMENT_END (segment, base)))
5094 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5095 #define IS_COREFILE_NOTE(p, s) \
5096 (p->p_type == PT_NOTE \
5097 && bfd_get_format (ibfd) == bfd_core \
5098 && s->vma == 0 && s->lma == 0 \
5099 && (bfd_vma) s->filepos >= p->p_offset \
5100 && ((bfd_vma) s->filepos + s->size \
5101 <= p->p_offset + p->p_filesz))
5103 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5104 linker, which generates a PT_INTERP section with p_vaddr and
5105 p_memsz set to 0. */
5106 #define IS_SOLARIS_PT_INTERP(p, s) \
5108 && p->p_paddr == 0 \
5109 && p->p_memsz == 0 \
5110 && p->p_filesz > 0 \
5111 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5113 && (bfd_vma) s->filepos >= p->p_offset \
5114 && ((bfd_vma) s->filepos + s->size \
5115 <= p->p_offset + p->p_filesz))
5117 /* Decide if the given section should be included in the given segment.
5118 A section will be included if:
5119 1. It is within the address space of the segment -- we use the LMA
5120 if that is set for the segment and the VMA otherwise,
5121 2. It is an allocated segment,
5122 3. There is an output section associated with it,
5123 4. The section has not already been allocated to a previous segment.
5124 5. PT_GNU_STACK segments do not include any sections.
5125 6. PT_TLS segment includes only SHF_TLS sections.
5126 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5127 8. PT_DYNAMIC should not contain empty sections at the beginning
5128 (with the possible exception of .dynamic). */
5129 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5130 ((((segment->p_paddr \
5131 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5132 : IS_CONTAINED_BY_VMA (section, segment)) \
5133 && (section->flags & SEC_ALLOC) != 0) \
5134 || IS_COREFILE_NOTE (segment, section)) \
5135 && section->output_section != NULL \
5136 && segment->p_type != PT_GNU_STACK \
5137 && (segment->p_type != PT_TLS \
5138 || (section->flags & SEC_THREAD_LOCAL)) \
5139 && (segment->p_type == PT_LOAD \
5140 || segment->p_type == PT_TLS \
5141 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5142 && (segment->p_type != PT_DYNAMIC \
5143 || SECTION_SIZE (section, segment) > 0 \
5144 || (segment->p_paddr \
5145 ? segment->p_paddr != section->lma \
5146 : segment->p_vaddr != section->vma) \
5147 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5149 && ! section->segment_mark)
5151 /* Returns TRUE iff seg1 starts after the end of seg2. */
5152 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5153 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5155 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5156 their VMA address ranges and their LMA address ranges overlap.
5157 It is possible to have overlapping VMA ranges without overlapping LMA
5158 ranges. RedBoot images for example can have both .data and .bss mapped
5159 to the same VMA range, but with the .data section mapped to a different
5161 #define SEGMENT_OVERLAPS(seg1, seg2) \
5162 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5163 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5164 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5165 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5167 /* Initialise the segment mark field. */
5168 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5169 section
->segment_mark
= FALSE
;
5171 /* Scan through the segments specified in the program header
5172 of the input BFD. For this first scan we look for overlaps
5173 in the loadable segments. These can be created by weird
5174 parameters to objcopy. Also, fix some solaris weirdness. */
5175 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5180 Elf_Internal_Phdr
*segment2
;
5182 if (segment
->p_type
== PT_INTERP
)
5183 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5184 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5186 /* Mininal change so that the normal section to segment
5187 assignment code will work. */
5188 segment
->p_vaddr
= section
->vma
;
5192 if (segment
->p_type
!= PT_LOAD
)
5195 /* Determine if this segment overlaps any previous segments. */
5196 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5198 bfd_signed_vma extra_length
;
5200 if (segment2
->p_type
!= PT_LOAD
5201 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5204 /* Merge the two segments together. */
5205 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5207 /* Extend SEGMENT2 to include SEGMENT and then delete
5210 SEGMENT_END (segment
, segment
->p_vaddr
)
5211 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5213 if (extra_length
> 0)
5215 segment2
->p_memsz
+= extra_length
;
5216 segment2
->p_filesz
+= extra_length
;
5219 segment
->p_type
= PT_NULL
;
5221 /* Since we have deleted P we must restart the outer loop. */
5223 segment
= elf_tdata (ibfd
)->phdr
;
5228 /* Extend SEGMENT to include SEGMENT2 and then delete
5231 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5232 - SEGMENT_END (segment
, segment
->p_vaddr
);
5234 if (extra_length
> 0)
5236 segment
->p_memsz
+= extra_length
;
5237 segment
->p_filesz
+= extra_length
;
5240 segment2
->p_type
= PT_NULL
;
5245 /* The second scan attempts to assign sections to segments. */
5246 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5250 unsigned int section_count
;
5251 asection
** sections
;
5252 asection
* output_section
;
5254 bfd_vma matching_lma
;
5255 bfd_vma suggested_lma
;
5259 if (segment
->p_type
== PT_NULL
)
5262 /* Compute how many sections might be placed into this segment. */
5263 for (section
= ibfd
->sections
, section_count
= 0;
5265 section
= section
->next
)
5266 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5269 /* Allocate a segment map big enough to contain
5270 all of the sections we have selected. */
5271 amt
= sizeof (struct elf_segment_map
);
5272 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5273 map
= bfd_alloc (obfd
, amt
);
5277 /* Initialise the fields of the segment map. Default to
5278 using the physical address of the segment in the input BFD. */
5280 map
->p_type
= segment
->p_type
;
5281 map
->p_flags
= segment
->p_flags
;
5282 map
->p_flags_valid
= 1;
5283 map
->p_paddr
= segment
->p_paddr
;
5284 map
->p_paddr_valid
= 1;
5286 /* Determine if this segment contains the ELF file header
5287 and if it contains the program headers themselves. */
5288 map
->includes_filehdr
= (segment
->p_offset
== 0
5289 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5291 map
->includes_phdrs
= 0;
5293 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5295 map
->includes_phdrs
=
5296 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5297 && (segment
->p_offset
+ segment
->p_filesz
5298 >= ((bfd_vma
) iehdr
->e_phoff
5299 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5301 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5302 phdr_included
= TRUE
;
5305 if (section_count
== 0)
5307 /* Special segments, such as the PT_PHDR segment, may contain
5308 no sections, but ordinary, loadable segments should contain
5309 something. They are allowed by the ELF spec however, so only
5310 a warning is produced. */
5311 if (segment
->p_type
== PT_LOAD
)
5312 (*_bfd_error_handler
)
5313 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5317 *pointer_to_map
= map
;
5318 pointer_to_map
= &map
->next
;
5323 /* Now scan the sections in the input BFD again and attempt
5324 to add their corresponding output sections to the segment map.
5325 The problem here is how to handle an output section which has
5326 been moved (ie had its LMA changed). There are four possibilities:
5328 1. None of the sections have been moved.
5329 In this case we can continue to use the segment LMA from the
5332 2. All of the sections have been moved by the same amount.
5333 In this case we can change the segment's LMA to match the LMA
5334 of the first section.
5336 3. Some of the sections have been moved, others have not.
5337 In this case those sections which have not been moved can be
5338 placed in the current segment which will have to have its size,
5339 and possibly its LMA changed, and a new segment or segments will
5340 have to be created to contain the other sections.
5342 4. The sections have been moved, but not by the same amount.
5343 In this case we can change the segment's LMA to match the LMA
5344 of the first section and we will have to create a new segment
5345 or segments to contain the other sections.
5347 In order to save time, we allocate an array to hold the section
5348 pointers that we are interested in. As these sections get assigned
5349 to a segment, they are removed from this array. */
5351 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5352 to work around this long long bug. */
5353 sections
= bfd_malloc2 (section_count
, sizeof (asection
*));
5354 if (sections
== NULL
)
5357 /* Step One: Scan for segment vs section LMA conflicts.
5358 Also add the sections to the section array allocated above.
5359 Also add the sections to the current segment. In the common
5360 case, where the sections have not been moved, this means that
5361 we have completely filled the segment, and there is nothing
5367 for (j
= 0, section
= ibfd
->sections
;
5369 section
= section
->next
)
5371 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5373 output_section
= section
->output_section
;
5375 sections
[j
++] = section
;
5377 /* The Solaris native linker always sets p_paddr to 0.
5378 We try to catch that case here, and set it to the
5379 correct value. Note - some backends require that
5380 p_paddr be left as zero. */
5381 if (segment
->p_paddr
== 0
5382 && segment
->p_vaddr
!= 0
5383 && (! bed
->want_p_paddr_set_to_zero
)
5385 && output_section
->lma
!= 0
5386 && (output_section
->vma
== (segment
->p_vaddr
5387 + (map
->includes_filehdr
5390 + (map
->includes_phdrs
5392 * iehdr
->e_phentsize
)
5394 map
->p_paddr
= segment
->p_vaddr
;
5396 /* Match up the physical address of the segment with the
5397 LMA address of the output section. */
5398 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5399 || IS_COREFILE_NOTE (segment
, section
)
5400 || (bed
->want_p_paddr_set_to_zero
&&
5401 IS_CONTAINED_BY_VMA (output_section
, segment
))
5404 if (matching_lma
== 0)
5405 matching_lma
= output_section
->lma
;
5407 /* We assume that if the section fits within the segment
5408 then it does not overlap any other section within that
5410 map
->sections
[isec
++] = output_section
;
5412 else if (suggested_lma
== 0)
5413 suggested_lma
= output_section
->lma
;
5417 BFD_ASSERT (j
== section_count
);
5419 /* Step Two: Adjust the physical address of the current segment,
5421 if (isec
== section_count
)
5423 /* All of the sections fitted within the segment as currently
5424 specified. This is the default case. Add the segment to
5425 the list of built segments and carry on to process the next
5426 program header in the input BFD. */
5427 map
->count
= section_count
;
5428 *pointer_to_map
= map
;
5429 pointer_to_map
= &map
->next
;
5436 if (matching_lma
!= 0)
5438 /* At least one section fits inside the current segment.
5439 Keep it, but modify its physical address to match the
5440 LMA of the first section that fitted. */
5441 map
->p_paddr
= matching_lma
;
5445 /* None of the sections fitted inside the current segment.
5446 Change the current segment's physical address to match
5447 the LMA of the first section. */
5448 map
->p_paddr
= suggested_lma
;
5451 /* Offset the segment physical address from the lma
5452 to allow for space taken up by elf headers. */
5453 if (map
->includes_filehdr
)
5454 map
->p_paddr
-= iehdr
->e_ehsize
;
5456 if (map
->includes_phdrs
)
5458 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5460 /* iehdr->e_phnum is just an estimate of the number
5461 of program headers that we will need. Make a note
5462 here of the number we used and the segment we chose
5463 to hold these headers, so that we can adjust the
5464 offset when we know the correct value. */
5465 phdr_adjust_num
= iehdr
->e_phnum
;
5466 phdr_adjust_seg
= map
;
5470 /* Step Three: Loop over the sections again, this time assigning
5471 those that fit to the current segment and removing them from the
5472 sections array; but making sure not to leave large gaps. Once all
5473 possible sections have been assigned to the current segment it is
5474 added to the list of built segments and if sections still remain
5475 to be assigned, a new segment is constructed before repeating
5483 /* Fill the current segment with sections that fit. */
5484 for (j
= 0; j
< section_count
; j
++)
5486 section
= sections
[j
];
5488 if (section
== NULL
)
5491 output_section
= section
->output_section
;
5493 BFD_ASSERT (output_section
!= NULL
);
5495 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5496 || IS_COREFILE_NOTE (segment
, section
))
5498 if (map
->count
== 0)
5500 /* If the first section in a segment does not start at
5501 the beginning of the segment, then something is
5503 if (output_section
->lma
!=
5505 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5506 + (map
->includes_phdrs
5507 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5513 asection
* prev_sec
;
5515 prev_sec
= map
->sections
[map
->count
- 1];
5517 /* If the gap between the end of the previous section
5518 and the start of this section is more than
5519 maxpagesize then we need to start a new segment. */
5520 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5522 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5523 || ((prev_sec
->lma
+ prev_sec
->size
)
5524 > output_section
->lma
))
5526 if (suggested_lma
== 0)
5527 suggested_lma
= output_section
->lma
;
5533 map
->sections
[map
->count
++] = output_section
;
5536 section
->segment_mark
= TRUE
;
5538 else if (suggested_lma
== 0)
5539 suggested_lma
= output_section
->lma
;
5542 BFD_ASSERT (map
->count
> 0);
5544 /* Add the current segment to the list of built segments. */
5545 *pointer_to_map
= map
;
5546 pointer_to_map
= &map
->next
;
5548 if (isec
< section_count
)
5550 /* We still have not allocated all of the sections to
5551 segments. Create a new segment here, initialise it
5552 and carry on looping. */
5553 amt
= sizeof (struct elf_segment_map
);
5554 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5555 map
= bfd_alloc (obfd
, amt
);
5562 /* Initialise the fields of the segment map. Set the physical
5563 physical address to the LMA of the first section that has
5564 not yet been assigned. */
5566 map
->p_type
= segment
->p_type
;
5567 map
->p_flags
= segment
->p_flags
;
5568 map
->p_flags_valid
= 1;
5569 map
->p_paddr
= suggested_lma
;
5570 map
->p_paddr_valid
= 1;
5571 map
->includes_filehdr
= 0;
5572 map
->includes_phdrs
= 0;
5575 while (isec
< section_count
);
5580 /* The Solaris linker creates program headers in which all the
5581 p_paddr fields are zero. When we try to objcopy or strip such a
5582 file, we get confused. Check for this case, and if we find it
5583 reset the p_paddr_valid fields. */
5584 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5585 if (map
->p_paddr
!= 0)
5588 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5589 map
->p_paddr_valid
= 0;
5591 elf_tdata (obfd
)->segment_map
= map_first
;
5593 /* If we had to estimate the number of program headers that were
5594 going to be needed, then check our estimate now and adjust
5595 the offset if necessary. */
5596 if (phdr_adjust_seg
!= NULL
)
5600 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5603 if (count
> phdr_adjust_num
)
5604 phdr_adjust_seg
->p_paddr
5605 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5610 #undef IS_CONTAINED_BY_VMA
5611 #undef IS_CONTAINED_BY_LMA
5612 #undef IS_COREFILE_NOTE
5613 #undef IS_SOLARIS_PT_INTERP
5614 #undef INCLUDE_SECTION_IN_SEGMENT
5615 #undef SEGMENT_AFTER_SEGMENT
5616 #undef SEGMENT_OVERLAPS
5620 /* Initialize private output section information from input section. */
5623 _bfd_elf_init_private_section_data (bfd
*ibfd
,
5627 struct bfd_link_info
*link_info
)
5630 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5631 bfd_boolean need_group
= link_info
== NULL
|| link_info
->relocatable
;
5633 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5634 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5637 /* FIXME: What if the output ELF section type has been set to
5638 something different? */
5639 if (elf_section_type (osec
) == SHT_NULL
)
5640 elf_section_type (osec
) = elf_section_type (isec
);
5642 /* Set things up for objcopy and relocatable link. The output
5643 SHT_GROUP section will have its elf_next_in_group pointing back
5644 to the input group members. Ignore linker created group section.
5645 See elfNN_ia64_object_p in elfxx-ia64.c. */
5649 if (elf_sec_group (isec
) == NULL
5650 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5652 if (elf_section_flags (isec
) & SHF_GROUP
)
5653 elf_section_flags (osec
) |= SHF_GROUP
;
5654 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5655 elf_group_name (osec
) = elf_group_name (isec
);
5659 ihdr
= &elf_section_data (isec
)->this_hdr
;
5661 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5662 don't use the output section of the linked-to section since it
5663 may be NULL at this point. */
5664 if ((ihdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
5666 ohdr
= &elf_section_data (osec
)->this_hdr
;
5667 ohdr
->sh_flags
|= SHF_LINK_ORDER
;
5668 elf_linked_to_section (osec
) = elf_linked_to_section (isec
);
5671 osec
->use_rela_p
= isec
->use_rela_p
;
5676 /* Copy private section information. This copies over the entsize
5677 field, and sometimes the info field. */
5680 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5685 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5687 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5688 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5691 ihdr
= &elf_section_data (isec
)->this_hdr
;
5692 ohdr
= &elf_section_data (osec
)->this_hdr
;
5694 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5696 if (ihdr
->sh_type
== SHT_SYMTAB
5697 || ihdr
->sh_type
== SHT_DYNSYM
5698 || ihdr
->sh_type
== SHT_GNU_verneed
5699 || ihdr
->sh_type
== SHT_GNU_verdef
)
5700 ohdr
->sh_info
= ihdr
->sh_info
;
5702 return _bfd_elf_init_private_section_data (ibfd
, isec
, obfd
, osec
,
5706 /* Copy private header information. */
5709 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5711 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5712 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5715 /* Copy over private BFD data if it has not already been copied.
5716 This must be done here, rather than in the copy_private_bfd_data
5717 entry point, because the latter is called after the section
5718 contents have been set, which means that the program headers have
5719 already been worked out. */
5720 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5722 if (! copy_private_bfd_data (ibfd
, obfd
))
5729 /* Copy private symbol information. If this symbol is in a section
5730 which we did not map into a BFD section, try to map the section
5731 index correctly. We use special macro definitions for the mapped
5732 section indices; these definitions are interpreted by the
5733 swap_out_syms function. */
5735 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5736 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5737 #define MAP_STRTAB (SHN_HIOS + 3)
5738 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5739 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5742 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5747 elf_symbol_type
*isym
, *osym
;
5749 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5750 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5753 isym
= elf_symbol_from (ibfd
, isymarg
);
5754 osym
= elf_symbol_from (obfd
, osymarg
);
5758 && bfd_is_abs_section (isym
->symbol
.section
))
5762 shndx
= isym
->internal_elf_sym
.st_shndx
;
5763 if (shndx
== elf_onesymtab (ibfd
))
5764 shndx
= MAP_ONESYMTAB
;
5765 else if (shndx
== elf_dynsymtab (ibfd
))
5766 shndx
= MAP_DYNSYMTAB
;
5767 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5769 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5770 shndx
= MAP_SHSTRTAB
;
5771 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5772 shndx
= MAP_SYM_SHNDX
;
5773 osym
->internal_elf_sym
.st_shndx
= shndx
;
5779 /* Swap out the symbols. */
5782 swap_out_syms (bfd
*abfd
,
5783 struct bfd_strtab_hash
**sttp
,
5786 const struct elf_backend_data
*bed
;
5789 struct bfd_strtab_hash
*stt
;
5790 Elf_Internal_Shdr
*symtab_hdr
;
5791 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5792 Elf_Internal_Shdr
*symstrtab_hdr
;
5793 bfd_byte
*outbound_syms
;
5794 bfd_byte
*outbound_shndx
;
5797 bfd_boolean name_local_sections
;
5799 if (!elf_map_symbols (abfd
))
5802 /* Dump out the symtabs. */
5803 stt
= _bfd_elf_stringtab_init ();
5807 bed
= get_elf_backend_data (abfd
);
5808 symcount
= bfd_get_symcount (abfd
);
5809 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5810 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5811 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5812 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5813 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5814 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5816 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5817 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5819 outbound_syms
= bfd_alloc2 (abfd
, 1 + symcount
, bed
->s
->sizeof_sym
);
5820 if (outbound_syms
== NULL
)
5822 _bfd_stringtab_free (stt
);
5825 symtab_hdr
->contents
= outbound_syms
;
5827 outbound_shndx
= NULL
;
5828 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5829 if (symtab_shndx_hdr
->sh_name
!= 0)
5831 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5832 outbound_shndx
= bfd_zalloc2 (abfd
, 1 + symcount
,
5833 sizeof (Elf_External_Sym_Shndx
));
5834 if (outbound_shndx
== NULL
)
5836 _bfd_stringtab_free (stt
);
5840 symtab_shndx_hdr
->contents
= outbound_shndx
;
5841 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5842 symtab_shndx_hdr
->sh_size
= amt
;
5843 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5844 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5847 /* Now generate the data (for "contents"). */
5849 /* Fill in zeroth symbol and swap it out. */
5850 Elf_Internal_Sym sym
;
5856 sym
.st_shndx
= SHN_UNDEF
;
5857 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5858 outbound_syms
+= bed
->s
->sizeof_sym
;
5859 if (outbound_shndx
!= NULL
)
5860 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5864 = (bed
->elf_backend_name_local_section_symbols
5865 && bed
->elf_backend_name_local_section_symbols (abfd
));
5867 syms
= bfd_get_outsymbols (abfd
);
5868 for (idx
= 0; idx
< symcount
; idx
++)
5870 Elf_Internal_Sym sym
;
5871 bfd_vma value
= syms
[idx
]->value
;
5872 elf_symbol_type
*type_ptr
;
5873 flagword flags
= syms
[idx
]->flags
;
5876 if (!name_local_sections
5877 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5879 /* Local section symbols have no name. */
5884 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5887 if (sym
.st_name
== (unsigned long) -1)
5889 _bfd_stringtab_free (stt
);
5894 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5896 if ((flags
& BSF_SECTION_SYM
) == 0
5897 && bfd_is_com_section (syms
[idx
]->section
))
5899 /* ELF common symbols put the alignment into the `value' field,
5900 and the size into the `size' field. This is backwards from
5901 how BFD handles it, so reverse it here. */
5902 sym
.st_size
= value
;
5903 if (type_ptr
== NULL
5904 || type_ptr
->internal_elf_sym
.st_value
== 0)
5905 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5907 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5908 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5909 (abfd
, syms
[idx
]->section
);
5913 asection
*sec
= syms
[idx
]->section
;
5916 if (sec
->output_section
)
5918 value
+= sec
->output_offset
;
5919 sec
= sec
->output_section
;
5922 /* Don't add in the section vma for relocatable output. */
5923 if (! relocatable_p
)
5925 sym
.st_value
= value
;
5926 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5928 if (bfd_is_abs_section (sec
)
5930 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5932 /* This symbol is in a real ELF section which we did
5933 not create as a BFD section. Undo the mapping done
5934 by copy_private_symbol_data. */
5935 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5939 shndx
= elf_onesymtab (abfd
);
5942 shndx
= elf_dynsymtab (abfd
);
5945 shndx
= elf_tdata (abfd
)->strtab_section
;
5948 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5951 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5959 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5965 /* Writing this would be a hell of a lot easier if
5966 we had some decent documentation on bfd, and
5967 knew what to expect of the library, and what to
5968 demand of applications. For example, it
5969 appears that `objcopy' might not set the
5970 section of a symbol to be a section that is
5971 actually in the output file. */
5972 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5975 _bfd_error_handler (_("\
5976 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5977 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5979 bfd_set_error (bfd_error_invalid_operation
);
5980 _bfd_stringtab_free (stt
);
5984 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5985 BFD_ASSERT (shndx
!= -1);
5989 sym
.st_shndx
= shndx
;
5992 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5994 else if ((flags
& BSF_FUNCTION
) != 0)
5996 else if ((flags
& BSF_OBJECT
) != 0)
6001 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
6004 /* Processor-specific types. */
6005 if (type_ptr
!= NULL
6006 && bed
->elf_backend_get_symbol_type
)
6007 type
= ((*bed
->elf_backend_get_symbol_type
)
6008 (&type_ptr
->internal_elf_sym
, type
));
6010 if (flags
& BSF_SECTION_SYM
)
6012 if (flags
& BSF_GLOBAL
)
6013 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
6015 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
6017 else if (bfd_is_com_section (syms
[idx
]->section
))
6018 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6019 else if (bfd_is_und_section (syms
[idx
]->section
))
6020 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6024 else if (flags
& BSF_FILE
)
6025 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6028 int bind
= STB_LOCAL
;
6030 if (flags
& BSF_LOCAL
)
6032 else if (flags
& BSF_WEAK
)
6034 else if (flags
& BSF_GLOBAL
)
6037 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6040 if (type_ptr
!= NULL
)
6041 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6045 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6046 outbound_syms
+= bed
->s
->sizeof_sym
;
6047 if (outbound_shndx
!= NULL
)
6048 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6052 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6053 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6055 symstrtab_hdr
->sh_flags
= 0;
6056 symstrtab_hdr
->sh_addr
= 0;
6057 symstrtab_hdr
->sh_entsize
= 0;
6058 symstrtab_hdr
->sh_link
= 0;
6059 symstrtab_hdr
->sh_info
= 0;
6060 symstrtab_hdr
->sh_addralign
= 1;
6065 /* Return the number of bytes required to hold the symtab vector.
6067 Note that we base it on the count plus 1, since we will null terminate
6068 the vector allocated based on this size. However, the ELF symbol table
6069 always has a dummy entry as symbol #0, so it ends up even. */
6072 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6076 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6078 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6079 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6081 symtab_size
-= sizeof (asymbol
*);
6087 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6091 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6093 if (elf_dynsymtab (abfd
) == 0)
6095 bfd_set_error (bfd_error_invalid_operation
);
6099 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6100 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6102 symtab_size
-= sizeof (asymbol
*);
6108 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6111 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6114 /* Canonicalize the relocs. */
6117 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6124 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6126 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6129 tblptr
= section
->relocation
;
6130 for (i
= 0; i
< section
->reloc_count
; i
++)
6131 *relptr
++ = tblptr
++;
6135 return section
->reloc_count
;
6139 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6141 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6142 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6145 bfd_get_symcount (abfd
) = symcount
;
6150 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6151 asymbol
**allocation
)
6153 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6154 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6157 bfd_get_dynamic_symcount (abfd
) = symcount
;
6161 /* Return the size required for the dynamic reloc entries. Any loadable
6162 section that was actually installed in the BFD, and has type SHT_REL
6163 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6164 dynamic reloc section. */
6167 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6172 if (elf_dynsymtab (abfd
) == 0)
6174 bfd_set_error (bfd_error_invalid_operation
);
6178 ret
= sizeof (arelent
*);
6179 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
))
6184 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6185 * sizeof (arelent
*));
6190 /* Canonicalize the dynamic relocation entries. Note that we return the
6191 dynamic relocations as a single block, although they are actually
6192 associated with particular sections; the interface, which was
6193 designed for SunOS style shared libraries, expects that there is only
6194 one set of dynamic relocs. Any loadable section that was actually
6195 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6196 dynamic symbol table, is considered to be a dynamic reloc section. */
6199 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6203 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6207 if (elf_dynsymtab (abfd
) == 0)
6209 bfd_set_error (bfd_error_invalid_operation
);
6213 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6215 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6217 if ((s
->flags
& SEC_LOAD
) != 0
6218 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6219 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6220 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6225 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6227 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6229 for (i
= 0; i
< count
; i
++)
6240 /* Read in the version information. */
6243 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6245 bfd_byte
*contents
= NULL
;
6246 unsigned int freeidx
= 0;
6248 if (elf_dynverref (abfd
) != 0)
6250 Elf_Internal_Shdr
*hdr
;
6251 Elf_External_Verneed
*everneed
;
6252 Elf_Internal_Verneed
*iverneed
;
6254 bfd_byte
*contents_end
;
6256 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6258 elf_tdata (abfd
)->verref
= bfd_zalloc2 (abfd
, hdr
->sh_info
,
6259 sizeof (Elf_Internal_Verneed
));
6260 if (elf_tdata (abfd
)->verref
== NULL
)
6263 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6265 contents
= bfd_malloc (hdr
->sh_size
);
6266 if (contents
== NULL
)
6268 error_return_verref
:
6269 elf_tdata (abfd
)->verref
= NULL
;
6270 elf_tdata (abfd
)->cverrefs
= 0;
6273 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6274 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6275 goto error_return_verref
;
6277 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verneed
))
6278 goto error_return_verref
;
6280 BFD_ASSERT (sizeof (Elf_External_Verneed
)
6281 == sizeof (Elf_External_Vernaux
));
6282 contents_end
= contents
+ hdr
->sh_size
- sizeof (Elf_External_Verneed
);
6283 everneed
= (Elf_External_Verneed
*) contents
;
6284 iverneed
= elf_tdata (abfd
)->verref
;
6285 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6287 Elf_External_Vernaux
*evernaux
;
6288 Elf_Internal_Vernaux
*ivernaux
;
6291 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6293 iverneed
->vn_bfd
= abfd
;
6295 iverneed
->vn_filename
=
6296 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6298 if (iverneed
->vn_filename
== NULL
)
6299 goto error_return_verref
;
6301 if (iverneed
->vn_cnt
== 0)
6302 iverneed
->vn_auxptr
= NULL
;
6305 iverneed
->vn_auxptr
= bfd_alloc2 (abfd
, iverneed
->vn_cnt
,
6306 sizeof (Elf_Internal_Vernaux
));
6307 if (iverneed
->vn_auxptr
== NULL
)
6308 goto error_return_verref
;
6311 if (iverneed
->vn_aux
6312 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6313 goto error_return_verref
;
6315 evernaux
= ((Elf_External_Vernaux
*)
6316 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6317 ivernaux
= iverneed
->vn_auxptr
;
6318 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6320 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6322 ivernaux
->vna_nodename
=
6323 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6324 ivernaux
->vna_name
);
6325 if (ivernaux
->vna_nodename
== NULL
)
6326 goto error_return_verref
;
6328 if (j
+ 1 < iverneed
->vn_cnt
)
6329 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6331 ivernaux
->vna_nextptr
= NULL
;
6333 if (ivernaux
->vna_next
6334 > (size_t) (contents_end
- (bfd_byte
*) evernaux
))
6335 goto error_return_verref
;
6337 evernaux
= ((Elf_External_Vernaux
*)
6338 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6340 if (ivernaux
->vna_other
> freeidx
)
6341 freeidx
= ivernaux
->vna_other
;
6344 if (i
+ 1 < hdr
->sh_info
)
6345 iverneed
->vn_nextref
= iverneed
+ 1;
6347 iverneed
->vn_nextref
= NULL
;
6349 if (iverneed
->vn_next
6350 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6351 goto error_return_verref
;
6353 everneed
= ((Elf_External_Verneed
*)
6354 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6361 if (elf_dynverdef (abfd
) != 0)
6363 Elf_Internal_Shdr
*hdr
;
6364 Elf_External_Verdef
*everdef
;
6365 Elf_Internal_Verdef
*iverdef
;
6366 Elf_Internal_Verdef
*iverdefarr
;
6367 Elf_Internal_Verdef iverdefmem
;
6369 unsigned int maxidx
;
6370 bfd_byte
*contents_end_def
, *contents_end_aux
;
6372 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6374 contents
= bfd_malloc (hdr
->sh_size
);
6375 if (contents
== NULL
)
6377 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6378 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6381 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verdef
))
6384 BFD_ASSERT (sizeof (Elf_External_Verdef
)
6385 >= sizeof (Elf_External_Verdaux
));
6386 contents_end_def
= contents
+ hdr
->sh_size
6387 - sizeof (Elf_External_Verdef
);
6388 contents_end_aux
= contents
+ hdr
->sh_size
6389 - sizeof (Elf_External_Verdaux
);
6391 /* We know the number of entries in the section but not the maximum
6392 index. Therefore we have to run through all entries and find
6394 everdef
= (Elf_External_Verdef
*) contents
;
6396 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6398 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6400 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6401 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6403 if (iverdefmem
.vd_next
6404 > (size_t) (contents_end_def
- (bfd_byte
*) everdef
))
6407 everdef
= ((Elf_External_Verdef
*)
6408 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6411 if (default_imported_symver
)
6413 if (freeidx
> maxidx
)
6418 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, maxidx
,
6419 sizeof (Elf_Internal_Verdef
));
6420 if (elf_tdata (abfd
)->verdef
== NULL
)
6423 elf_tdata (abfd
)->cverdefs
= maxidx
;
6425 everdef
= (Elf_External_Verdef
*) contents
;
6426 iverdefarr
= elf_tdata (abfd
)->verdef
;
6427 for (i
= 0; i
< hdr
->sh_info
; i
++)
6429 Elf_External_Verdaux
*everdaux
;
6430 Elf_Internal_Verdaux
*iverdaux
;
6433 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6435 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) == 0)
6437 error_return_verdef
:
6438 elf_tdata (abfd
)->verdef
= NULL
;
6439 elf_tdata (abfd
)->cverdefs
= 0;
6443 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6444 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6446 iverdef
->vd_bfd
= abfd
;
6448 if (iverdef
->vd_cnt
== 0)
6449 iverdef
->vd_auxptr
= NULL
;
6452 iverdef
->vd_auxptr
= bfd_alloc2 (abfd
, iverdef
->vd_cnt
,
6453 sizeof (Elf_Internal_Verdaux
));
6454 if (iverdef
->vd_auxptr
== NULL
)
6455 goto error_return_verdef
;
6459 > (size_t) (contents_end_aux
- (bfd_byte
*) everdef
))
6460 goto error_return_verdef
;
6462 everdaux
= ((Elf_External_Verdaux
*)
6463 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6464 iverdaux
= iverdef
->vd_auxptr
;
6465 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6467 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6469 iverdaux
->vda_nodename
=
6470 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6471 iverdaux
->vda_name
);
6472 if (iverdaux
->vda_nodename
== NULL
)
6473 goto error_return_verdef
;
6475 if (j
+ 1 < iverdef
->vd_cnt
)
6476 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6478 iverdaux
->vda_nextptr
= NULL
;
6480 if (iverdaux
->vda_next
6481 > (size_t) (contents_end_aux
- (bfd_byte
*) everdaux
))
6482 goto error_return_verdef
;
6484 everdaux
= ((Elf_External_Verdaux
*)
6485 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6488 if (iverdef
->vd_cnt
)
6489 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6491 if ((size_t) (iverdef
- iverdefarr
) + 1 < maxidx
)
6492 iverdef
->vd_nextdef
= iverdef
+ 1;
6494 iverdef
->vd_nextdef
= NULL
;
6496 everdef
= ((Elf_External_Verdef
*)
6497 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6503 else if (default_imported_symver
)
6510 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, freeidx
,
6511 sizeof (Elf_Internal_Verdef
));
6512 if (elf_tdata (abfd
)->verdef
== NULL
)
6515 elf_tdata (abfd
)->cverdefs
= freeidx
;
6518 /* Create a default version based on the soname. */
6519 if (default_imported_symver
)
6521 Elf_Internal_Verdef
*iverdef
;
6522 Elf_Internal_Verdaux
*iverdaux
;
6524 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6526 iverdef
->vd_version
= VER_DEF_CURRENT
;
6527 iverdef
->vd_flags
= 0;
6528 iverdef
->vd_ndx
= freeidx
;
6529 iverdef
->vd_cnt
= 1;
6531 iverdef
->vd_bfd
= abfd
;
6533 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6534 if (iverdef
->vd_nodename
== NULL
)
6535 goto error_return_verdef
;
6536 iverdef
->vd_nextdef
= NULL
;
6537 iverdef
->vd_auxptr
= bfd_alloc (abfd
, sizeof (Elf_Internal_Verdaux
));
6538 if (iverdef
->vd_auxptr
== NULL
)
6539 goto error_return_verdef
;
6541 iverdaux
= iverdef
->vd_auxptr
;
6542 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6543 iverdaux
->vda_nextptr
= NULL
;
6549 if (contents
!= NULL
)
6555 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6557 elf_symbol_type
*newsym
;
6558 bfd_size_type amt
= sizeof (elf_symbol_type
);
6560 newsym
= bfd_zalloc (abfd
, amt
);
6565 newsym
->symbol
.the_bfd
= abfd
;
6566 return &newsym
->symbol
;
6571 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6575 bfd_symbol_info (symbol
, ret
);
6578 /* Return whether a symbol name implies a local symbol. Most targets
6579 use this function for the is_local_label_name entry point, but some
6583 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6586 /* Normal local symbols start with ``.L''. */
6587 if (name
[0] == '.' && name
[1] == 'L')
6590 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6591 DWARF debugging symbols starting with ``..''. */
6592 if (name
[0] == '.' && name
[1] == '.')
6595 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6596 emitting DWARF debugging output. I suspect this is actually a
6597 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6598 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6599 underscore to be emitted on some ELF targets). For ease of use,
6600 we treat such symbols as local. */
6601 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6608 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6609 asymbol
*symbol ATTRIBUTE_UNUSED
)
6616 _bfd_elf_set_arch_mach (bfd
*abfd
,
6617 enum bfd_architecture arch
,
6618 unsigned long machine
)
6620 /* If this isn't the right architecture for this backend, and this
6621 isn't the generic backend, fail. */
6622 if (arch
!= get_elf_backend_data (abfd
)->arch
6623 && arch
!= bfd_arch_unknown
6624 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6627 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6630 /* Find the function to a particular section and offset,
6631 for error reporting. */
6634 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6638 const char **filename_ptr
,
6639 const char **functionname_ptr
)
6641 const char *filename
;
6642 asymbol
*func
, *file
;
6645 /* ??? Given multiple file symbols, it is impossible to reliably
6646 choose the right file name for global symbols. File symbols are
6647 local symbols, and thus all file symbols must sort before any
6648 global symbols. The ELF spec may be interpreted to say that a
6649 file symbol must sort before other local symbols, but currently
6650 ld -r doesn't do this. So, for ld -r output, it is possible to
6651 make a better choice of file name for local symbols by ignoring
6652 file symbols appearing after a given local symbol. */
6653 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6659 state
= nothing_seen
;
6661 for (p
= symbols
; *p
!= NULL
; p
++)
6665 q
= (elf_symbol_type
*) *p
;
6667 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6673 if (state
== symbol_seen
)
6674 state
= file_after_symbol_seen
;
6680 if (bfd_get_section (&q
->symbol
) == section
6681 && q
->symbol
.value
>= low_func
6682 && q
->symbol
.value
<= offset
)
6684 func
= (asymbol
*) q
;
6685 low_func
= q
->symbol
.value
;
6688 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6689 && state
== file_after_symbol_seen
)
6692 filename
= bfd_asymbol_name (file
);
6696 if (state
== nothing_seen
)
6697 state
= symbol_seen
;
6704 *filename_ptr
= filename
;
6705 if (functionname_ptr
)
6706 *functionname_ptr
= bfd_asymbol_name (func
);
6711 /* Find the nearest line to a particular section and offset,
6712 for error reporting. */
6715 _bfd_elf_find_nearest_line (bfd
*abfd
,
6719 const char **filename_ptr
,
6720 const char **functionname_ptr
,
6721 unsigned int *line_ptr
)
6725 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6726 filename_ptr
, functionname_ptr
,
6729 if (!*functionname_ptr
)
6730 elf_find_function (abfd
, section
, symbols
, offset
,
6731 *filename_ptr
? NULL
: filename_ptr
,
6737 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6738 filename_ptr
, functionname_ptr
,
6740 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6742 if (!*functionname_ptr
)
6743 elf_find_function (abfd
, section
, symbols
, offset
,
6744 *filename_ptr
? NULL
: filename_ptr
,
6750 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6751 &found
, filename_ptr
,
6752 functionname_ptr
, line_ptr
,
6753 &elf_tdata (abfd
)->line_info
))
6755 if (found
&& (*functionname_ptr
|| *line_ptr
))
6758 if (symbols
== NULL
)
6761 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6762 filename_ptr
, functionname_ptr
))
6769 /* Find the line for a symbol. */
6772 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6773 const char **filename_ptr
, unsigned int *line_ptr
)
6775 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6776 filename_ptr
, line_ptr
, 0,
6777 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6780 /* After a call to bfd_find_nearest_line, successive calls to
6781 bfd_find_inliner_info can be used to get source information about
6782 each level of function inlining that terminated at the address
6783 passed to bfd_find_nearest_line. Currently this is only supported
6784 for DWARF2 with appropriate DWARF3 extensions. */
6787 _bfd_elf_find_inliner_info (bfd
*abfd
,
6788 const char **filename_ptr
,
6789 const char **functionname_ptr
,
6790 unsigned int *line_ptr
)
6793 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6794 functionname_ptr
, line_ptr
,
6795 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6800 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6804 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6806 ret
+= get_program_header_size (abfd
);
6811 _bfd_elf_set_section_contents (bfd
*abfd
,
6813 const void *location
,
6815 bfd_size_type count
)
6817 Elf_Internal_Shdr
*hdr
;
6820 if (! abfd
->output_has_begun
6821 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6824 hdr
= &elf_section_data (section
)->this_hdr
;
6825 pos
= hdr
->sh_offset
+ offset
;
6826 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6827 || bfd_bwrite (location
, count
, abfd
) != count
)
6834 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6835 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6836 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6841 /* Try to convert a non-ELF reloc into an ELF one. */
6844 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6846 /* Check whether we really have an ELF howto. */
6848 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6850 bfd_reloc_code_real_type code
;
6851 reloc_howto_type
*howto
;
6853 /* Alien reloc: Try to determine its type to replace it with an
6854 equivalent ELF reloc. */
6856 if (areloc
->howto
->pc_relative
)
6858 switch (areloc
->howto
->bitsize
)
6861 code
= BFD_RELOC_8_PCREL
;
6864 code
= BFD_RELOC_12_PCREL
;
6867 code
= BFD_RELOC_16_PCREL
;
6870 code
= BFD_RELOC_24_PCREL
;
6873 code
= BFD_RELOC_32_PCREL
;
6876 code
= BFD_RELOC_64_PCREL
;
6882 howto
= bfd_reloc_type_lookup (abfd
, code
);
6884 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6886 if (howto
->pcrel_offset
)
6887 areloc
->addend
+= areloc
->address
;
6889 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6894 switch (areloc
->howto
->bitsize
)
6900 code
= BFD_RELOC_14
;
6903 code
= BFD_RELOC_16
;
6906 code
= BFD_RELOC_26
;
6909 code
= BFD_RELOC_32
;
6912 code
= BFD_RELOC_64
;
6918 howto
= bfd_reloc_type_lookup (abfd
, code
);
6922 areloc
->howto
= howto
;
6930 (*_bfd_error_handler
)
6931 (_("%B: unsupported relocation type %s"),
6932 abfd
, areloc
->howto
->name
);
6933 bfd_set_error (bfd_error_bad_value
);
6938 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6940 if (bfd_get_format (abfd
) == bfd_object
)
6942 if (elf_shstrtab (abfd
) != NULL
)
6943 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6944 _bfd_dwarf2_cleanup_debug_info (abfd
);
6947 return _bfd_generic_close_and_cleanup (abfd
);
6950 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6951 in the relocation's offset. Thus we cannot allow any sort of sanity
6952 range-checking to interfere. There is nothing else to do in processing
6955 bfd_reloc_status_type
6956 _bfd_elf_rel_vtable_reloc_fn
6957 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6958 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6959 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6960 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6962 return bfd_reloc_ok
;
6965 /* Elf core file support. Much of this only works on native
6966 toolchains, since we rely on knowing the
6967 machine-dependent procfs structure in order to pick
6968 out details about the corefile. */
6970 #ifdef HAVE_SYS_PROCFS_H
6971 # include <sys/procfs.h>
6974 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6977 elfcore_make_pid (bfd
*abfd
)
6979 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6980 + (elf_tdata (abfd
)->core_pid
));
6983 /* If there isn't a section called NAME, make one, using
6984 data from SECT. Note, this function will generate a
6985 reference to NAME, so you shouldn't deallocate or
6989 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6993 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6996 sect2
= bfd_make_section (abfd
, name
);
7000 sect2
->size
= sect
->size
;
7001 sect2
->filepos
= sect
->filepos
;
7002 sect2
->flags
= sect
->flags
;
7003 sect2
->alignment_power
= sect
->alignment_power
;
7007 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7008 actually creates up to two pseudosections:
7009 - For the single-threaded case, a section named NAME, unless
7010 such a section already exists.
7011 - For the multi-threaded case, a section named "NAME/PID", where
7012 PID is elfcore_make_pid (abfd).
7013 Both pseudosections have identical contents. */
7015 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
7021 char *threaded_name
;
7025 /* Build the section name. */
7027 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
7028 len
= strlen (buf
) + 1;
7029 threaded_name
= bfd_alloc (abfd
, len
);
7030 if (threaded_name
== NULL
)
7032 memcpy (threaded_name
, buf
, len
);
7034 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
7038 sect
->filepos
= filepos
;
7039 sect
->flags
= SEC_HAS_CONTENTS
;
7040 sect
->alignment_power
= 2;
7042 return elfcore_maybe_make_sect (abfd
, name
, sect
);
7045 /* prstatus_t exists on:
7047 linux 2.[01] + glibc
7051 #if defined (HAVE_PRSTATUS_T)
7054 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7059 if (note
->descsz
== sizeof (prstatus_t
))
7063 size
= sizeof (prstat
.pr_reg
);
7064 offset
= offsetof (prstatus_t
, pr_reg
);
7065 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7067 /* Do not overwrite the core signal if it
7068 has already been set by another thread. */
7069 if (elf_tdata (abfd
)->core_signal
== 0)
7070 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7071 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7073 /* pr_who exists on:
7076 pr_who doesn't exist on:
7079 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7080 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7083 #if defined (HAVE_PRSTATUS32_T)
7084 else if (note
->descsz
== sizeof (prstatus32_t
))
7086 /* 64-bit host, 32-bit corefile */
7087 prstatus32_t prstat
;
7089 size
= sizeof (prstat
.pr_reg
);
7090 offset
= offsetof (prstatus32_t
, pr_reg
);
7091 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7093 /* Do not overwrite the core signal if it
7094 has already been set by another thread. */
7095 if (elf_tdata (abfd
)->core_signal
== 0)
7096 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7097 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7099 /* pr_who exists on:
7102 pr_who doesn't exist on:
7105 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7106 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7109 #endif /* HAVE_PRSTATUS32_T */
7112 /* Fail - we don't know how to handle any other
7113 note size (ie. data object type). */
7117 /* Make a ".reg/999" section and a ".reg" section. */
7118 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7119 size
, note
->descpos
+ offset
);
7121 #endif /* defined (HAVE_PRSTATUS_T) */
7123 /* Create a pseudosection containing the exact contents of NOTE. */
7125 elfcore_make_note_pseudosection (bfd
*abfd
,
7127 Elf_Internal_Note
*note
)
7129 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7130 note
->descsz
, note
->descpos
);
7133 /* There isn't a consistent prfpregset_t across platforms,
7134 but it doesn't matter, because we don't have to pick this
7135 data structure apart. */
7138 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7140 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7143 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7144 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7148 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7150 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7153 #if defined (HAVE_PRPSINFO_T)
7154 typedef prpsinfo_t elfcore_psinfo_t
;
7155 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7156 typedef prpsinfo32_t elfcore_psinfo32_t
;
7160 #if defined (HAVE_PSINFO_T)
7161 typedef psinfo_t elfcore_psinfo_t
;
7162 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7163 typedef psinfo32_t elfcore_psinfo32_t
;
7167 /* return a malloc'ed copy of a string at START which is at
7168 most MAX bytes long, possibly without a terminating '\0'.
7169 the copy will always have a terminating '\0'. */
7172 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7175 char *end
= memchr (start
, '\0', max
);
7183 dups
= bfd_alloc (abfd
, len
+ 1);
7187 memcpy (dups
, start
, len
);
7193 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7195 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7197 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7199 elfcore_psinfo_t psinfo
;
7201 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7203 elf_tdata (abfd
)->core_program
7204 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7205 sizeof (psinfo
.pr_fname
));
7207 elf_tdata (abfd
)->core_command
7208 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7209 sizeof (psinfo
.pr_psargs
));
7211 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7212 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7214 /* 64-bit host, 32-bit corefile */
7215 elfcore_psinfo32_t psinfo
;
7217 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7219 elf_tdata (abfd
)->core_program
7220 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7221 sizeof (psinfo
.pr_fname
));
7223 elf_tdata (abfd
)->core_command
7224 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7225 sizeof (psinfo
.pr_psargs
));
7231 /* Fail - we don't know how to handle any other
7232 note size (ie. data object type). */
7236 /* Note that for some reason, a spurious space is tacked
7237 onto the end of the args in some (at least one anyway)
7238 implementations, so strip it off if it exists. */
7241 char *command
= elf_tdata (abfd
)->core_command
;
7242 int n
= strlen (command
);
7244 if (0 < n
&& command
[n
- 1] == ' ')
7245 command
[n
- 1] = '\0';
7250 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7252 #if defined (HAVE_PSTATUS_T)
7254 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7256 if (note
->descsz
== sizeof (pstatus_t
)
7257 #if defined (HAVE_PXSTATUS_T)
7258 || note
->descsz
== sizeof (pxstatus_t
)
7264 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7266 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7268 #if defined (HAVE_PSTATUS32_T)
7269 else if (note
->descsz
== sizeof (pstatus32_t
))
7271 /* 64-bit host, 32-bit corefile */
7274 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7276 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7279 /* Could grab some more details from the "representative"
7280 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7281 NT_LWPSTATUS note, presumably. */
7285 #endif /* defined (HAVE_PSTATUS_T) */
7287 #if defined (HAVE_LWPSTATUS_T)
7289 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7291 lwpstatus_t lwpstat
;
7297 if (note
->descsz
!= sizeof (lwpstat
)
7298 #if defined (HAVE_LWPXSTATUS_T)
7299 && note
->descsz
!= sizeof (lwpxstatus_t
)
7304 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7306 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7307 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7309 /* Make a ".reg/999" section. */
7311 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7312 len
= strlen (buf
) + 1;
7313 name
= bfd_alloc (abfd
, len
);
7316 memcpy (name
, buf
, len
);
7318 sect
= bfd_make_section_anyway (abfd
, name
);
7322 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7323 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7324 sect
->filepos
= note
->descpos
7325 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7328 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7329 sect
->size
= sizeof (lwpstat
.pr_reg
);
7330 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7333 sect
->flags
= SEC_HAS_CONTENTS
;
7334 sect
->alignment_power
= 2;
7336 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7339 /* Make a ".reg2/999" section */
7341 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7342 len
= strlen (buf
) + 1;
7343 name
= bfd_alloc (abfd
, len
);
7346 memcpy (name
, buf
, len
);
7348 sect
= bfd_make_section_anyway (abfd
, name
);
7352 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7353 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7354 sect
->filepos
= note
->descpos
7355 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7358 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7359 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7360 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7363 sect
->flags
= SEC_HAS_CONTENTS
;
7364 sect
->alignment_power
= 2;
7366 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7368 #endif /* defined (HAVE_LWPSTATUS_T) */
7370 #if defined (HAVE_WIN32_PSTATUS_T)
7372 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7378 win32_pstatus_t pstatus
;
7380 if (note
->descsz
< sizeof (pstatus
))
7383 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7385 switch (pstatus
.data_type
)
7387 case NOTE_INFO_PROCESS
:
7388 /* FIXME: need to add ->core_command. */
7389 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7390 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7393 case NOTE_INFO_THREAD
:
7394 /* Make a ".reg/999" section. */
7395 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7397 len
= strlen (buf
) + 1;
7398 name
= bfd_alloc (abfd
, len
);
7402 memcpy (name
, buf
, len
);
7404 sect
= bfd_make_section_anyway (abfd
, name
);
7408 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7409 sect
->filepos
= (note
->descpos
7410 + offsetof (struct win32_pstatus
,
7411 data
.thread_info
.thread_context
));
7412 sect
->flags
= SEC_HAS_CONTENTS
;
7413 sect
->alignment_power
= 2;
7415 if (pstatus
.data
.thread_info
.is_active_thread
)
7416 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7420 case NOTE_INFO_MODULE
:
7421 /* Make a ".module/xxxxxxxx" section. */
7422 sprintf (buf
, ".module/%08lx",
7423 (long) pstatus
.data
.module_info
.base_address
);
7425 len
= strlen (buf
) + 1;
7426 name
= bfd_alloc (abfd
, len
);
7430 memcpy (name
, buf
, len
);
7432 sect
= bfd_make_section_anyway (abfd
, name
);
7437 sect
->size
= note
->descsz
;
7438 sect
->filepos
= note
->descpos
;
7439 sect
->flags
= SEC_HAS_CONTENTS
;
7440 sect
->alignment_power
= 2;
7449 #endif /* HAVE_WIN32_PSTATUS_T */
7452 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7454 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7462 if (bed
->elf_backend_grok_prstatus
)
7463 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7465 #if defined (HAVE_PRSTATUS_T)
7466 return elfcore_grok_prstatus (abfd
, note
);
7471 #if defined (HAVE_PSTATUS_T)
7473 return elfcore_grok_pstatus (abfd
, note
);
7476 #if defined (HAVE_LWPSTATUS_T)
7478 return elfcore_grok_lwpstatus (abfd
, note
);
7481 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7482 return elfcore_grok_prfpreg (abfd
, note
);
7484 #if defined (HAVE_WIN32_PSTATUS_T)
7485 case NT_WIN32PSTATUS
:
7486 return elfcore_grok_win32pstatus (abfd
, note
);
7489 case NT_PRXFPREG
: /* Linux SSE extension */
7490 if (note
->namesz
== 6
7491 && strcmp (note
->namedata
, "LINUX") == 0)
7492 return elfcore_grok_prxfpreg (abfd
, note
);
7498 if (bed
->elf_backend_grok_psinfo
)
7499 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7501 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7502 return elfcore_grok_psinfo (abfd
, note
);
7509 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7513 sect
->size
= note
->descsz
;
7514 sect
->filepos
= note
->descpos
;
7515 sect
->flags
= SEC_HAS_CONTENTS
;
7516 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7524 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7528 cp
= strchr (note
->namedata
, '@');
7531 *lwpidp
= atoi(cp
+ 1);
7538 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7541 /* Signal number at offset 0x08. */
7542 elf_tdata (abfd
)->core_signal
7543 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7545 /* Process ID at offset 0x50. */
7546 elf_tdata (abfd
)->core_pid
7547 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7549 /* Command name at 0x7c (max 32 bytes, including nul). */
7550 elf_tdata (abfd
)->core_command
7551 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7553 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7558 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7562 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7563 elf_tdata (abfd
)->core_lwpid
= lwp
;
7565 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7567 /* NetBSD-specific core "procinfo". Note that we expect to
7568 find this note before any of the others, which is fine,
7569 since the kernel writes this note out first when it
7570 creates a core file. */
7572 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7575 /* As of Jan 2002 there are no other machine-independent notes
7576 defined for NetBSD core files. If the note type is less
7577 than the start of the machine-dependent note types, we don't
7580 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7584 switch (bfd_get_arch (abfd
))
7586 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7587 PT_GETFPREGS == mach+2. */
7589 case bfd_arch_alpha
:
7590 case bfd_arch_sparc
:
7593 case NT_NETBSDCORE_FIRSTMACH
+0:
7594 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7596 case NT_NETBSDCORE_FIRSTMACH
+2:
7597 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7603 /* On all other arch's, PT_GETREGS == mach+1 and
7604 PT_GETFPREGS == mach+3. */
7609 case NT_NETBSDCORE_FIRSTMACH
+1:
7610 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7612 case NT_NETBSDCORE_FIRSTMACH
+3:
7613 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7623 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7625 void *ddata
= note
->descdata
;
7632 /* nto_procfs_status 'pid' field is at offset 0. */
7633 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7635 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7636 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7638 /* nto_procfs_status 'flags' field is at offset 8. */
7639 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7641 /* nto_procfs_status 'what' field is at offset 14. */
7642 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7644 elf_tdata (abfd
)->core_signal
= sig
;
7645 elf_tdata (abfd
)->core_lwpid
= *tid
;
7648 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7649 do not come from signals so we make sure we set the current
7650 thread just in case. */
7651 if (flags
& 0x00000080)
7652 elf_tdata (abfd
)->core_lwpid
= *tid
;
7654 /* Make a ".qnx_core_status/%d" section. */
7655 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7657 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7662 sect
= bfd_make_section_anyway (abfd
, name
);
7666 sect
->size
= note
->descsz
;
7667 sect
->filepos
= note
->descpos
;
7668 sect
->flags
= SEC_HAS_CONTENTS
;
7669 sect
->alignment_power
= 2;
7671 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7675 elfcore_grok_nto_regs (bfd
*abfd
,
7676 Elf_Internal_Note
*note
,
7684 /* Make a "(base)/%d" section. */
7685 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7687 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7692 sect
= bfd_make_section_anyway (abfd
, name
);
7696 sect
->size
= note
->descsz
;
7697 sect
->filepos
= note
->descpos
;
7698 sect
->flags
= SEC_HAS_CONTENTS
;
7699 sect
->alignment_power
= 2;
7701 /* This is the current thread. */
7702 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7703 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7708 #define BFD_QNT_CORE_INFO 7
7709 #define BFD_QNT_CORE_STATUS 8
7710 #define BFD_QNT_CORE_GREG 9
7711 #define BFD_QNT_CORE_FPREG 10
7714 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7716 /* Every GREG section has a STATUS section before it. Store the
7717 tid from the previous call to pass down to the next gregs
7719 static pid_t tid
= 1;
7723 case BFD_QNT_CORE_INFO
:
7724 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7725 case BFD_QNT_CORE_STATUS
:
7726 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7727 case BFD_QNT_CORE_GREG
:
7728 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7729 case BFD_QNT_CORE_FPREG
:
7730 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7736 /* Function: elfcore_write_note
7743 size of data for note
7746 End of buffer containing note. */
7749 elfcore_write_note (bfd
*abfd
,
7757 Elf_External_Note
*xnp
;
7767 const struct elf_backend_data
*bed
;
7769 namesz
= strlen (name
) + 1;
7770 bed
= get_elf_backend_data (abfd
);
7771 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7774 newspace
= 12 + namesz
+ pad
+ size
;
7776 p
= realloc (buf
, *bufsiz
+ newspace
);
7778 *bufsiz
+= newspace
;
7779 xnp
= (Elf_External_Note
*) dest
;
7780 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7781 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7782 H_PUT_32 (abfd
, type
, xnp
->type
);
7786 memcpy (dest
, name
, namesz
);
7794 memcpy (dest
, input
, size
);
7798 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7800 elfcore_write_prpsinfo (bfd
*abfd
,
7807 char *note_name
= "CORE";
7809 #if defined (HAVE_PSINFO_T)
7811 note_type
= NT_PSINFO
;
7814 note_type
= NT_PRPSINFO
;
7817 memset (&data
, 0, sizeof (data
));
7818 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7819 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7820 return elfcore_write_note (abfd
, buf
, bufsiz
,
7821 note_name
, note_type
, &data
, sizeof (data
));
7823 #endif /* PSINFO_T or PRPSINFO_T */
7825 #if defined (HAVE_PRSTATUS_T)
7827 elfcore_write_prstatus (bfd
*abfd
,
7835 char *note_name
= "CORE";
7837 memset (&prstat
, 0, sizeof (prstat
));
7838 prstat
.pr_pid
= pid
;
7839 prstat
.pr_cursig
= cursig
;
7840 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7841 return elfcore_write_note (abfd
, buf
, bufsiz
,
7842 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7844 #endif /* HAVE_PRSTATUS_T */
7846 #if defined (HAVE_LWPSTATUS_T)
7848 elfcore_write_lwpstatus (bfd
*abfd
,
7855 lwpstatus_t lwpstat
;
7856 char *note_name
= "CORE";
7858 memset (&lwpstat
, 0, sizeof (lwpstat
));
7859 lwpstat
.pr_lwpid
= pid
>> 16;
7860 lwpstat
.pr_cursig
= cursig
;
7861 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7862 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7863 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7865 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7866 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7868 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7869 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7872 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7873 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7875 #endif /* HAVE_LWPSTATUS_T */
7877 #if defined (HAVE_PSTATUS_T)
7879 elfcore_write_pstatus (bfd
*abfd
,
7887 char *note_name
= "CORE";
7889 memset (&pstat
, 0, sizeof (pstat
));
7890 pstat
.pr_pid
= pid
& 0xffff;
7891 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7892 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7895 #endif /* HAVE_PSTATUS_T */
7898 elfcore_write_prfpreg (bfd
*abfd
,
7904 char *note_name
= "CORE";
7905 return elfcore_write_note (abfd
, buf
, bufsiz
,
7906 note_name
, NT_FPREGSET
, fpregs
, size
);
7910 elfcore_write_prxfpreg (bfd
*abfd
,
7913 const void *xfpregs
,
7916 char *note_name
= "LINUX";
7917 return elfcore_write_note (abfd
, buf
, bufsiz
,
7918 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7922 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7930 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7933 buf
= bfd_malloc (size
);
7937 if (bfd_bread (buf
, size
, abfd
) != size
)
7945 while (p
< buf
+ size
)
7947 /* FIXME: bad alignment assumption. */
7948 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7949 Elf_Internal_Note in
;
7951 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7953 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7954 in
.namedata
= xnp
->name
;
7956 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7957 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7958 in
.descpos
= offset
+ (in
.descdata
- buf
);
7960 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7962 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7965 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7967 if (! elfcore_grok_nto_note (abfd
, &in
))
7972 if (! elfcore_grok_note (abfd
, &in
))
7976 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7983 /* Providing external access to the ELF program header table. */
7985 /* Return an upper bound on the number of bytes required to store a
7986 copy of ABFD's program header table entries. Return -1 if an error
7987 occurs; bfd_get_error will return an appropriate code. */
7990 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7992 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7994 bfd_set_error (bfd_error_wrong_format
);
7998 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
8001 /* Copy ABFD's program header table entries to *PHDRS. The entries
8002 will be stored as an array of Elf_Internal_Phdr structures, as
8003 defined in include/elf/internal.h. To find out how large the
8004 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8006 Return the number of program header table entries read, or -1 if an
8007 error occurs; bfd_get_error will return an appropriate code. */
8010 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
8014 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8016 bfd_set_error (bfd_error_wrong_format
);
8020 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
8021 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
8022 num_phdrs
* sizeof (Elf_Internal_Phdr
));
8028 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
8031 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8033 i_ehdrp
= elf_elfheader (abfd
);
8034 if (i_ehdrp
== NULL
)
8035 sprintf_vma (buf
, value
);
8038 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8040 #if BFD_HOST_64BIT_LONG
8041 sprintf (buf
, "%016lx", value
);
8043 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
8044 _bfd_int64_low (value
));
8048 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
8051 sprintf_vma (buf
, value
);
8056 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
8059 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8061 i_ehdrp
= elf_elfheader (abfd
);
8062 if (i_ehdrp
== NULL
)
8063 fprintf_vma ((FILE *) stream
, value
);
8066 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8068 #if BFD_HOST_64BIT_LONG
8069 fprintf ((FILE *) stream
, "%016lx", value
);
8071 fprintf ((FILE *) stream
, "%08lx%08lx",
8072 _bfd_int64_high (value
), _bfd_int64_low (value
));
8076 fprintf ((FILE *) stream
, "%08lx",
8077 (unsigned long) (value
& 0xffffffff));
8080 fprintf_vma ((FILE *) stream
, value
);
8084 enum elf_reloc_type_class
8085 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8087 return reloc_class_normal
;
8090 /* For RELA architectures, return the relocation value for a
8091 relocation against a local symbol. */
8094 _bfd_elf_rela_local_sym (bfd
*abfd
,
8095 Elf_Internal_Sym
*sym
,
8097 Elf_Internal_Rela
*rel
)
8099 asection
*sec
= *psec
;
8102 relocation
= (sec
->output_section
->vma
8103 + sec
->output_offset
8105 if ((sec
->flags
& SEC_MERGE
)
8106 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8107 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8110 _bfd_merged_section_offset (abfd
, psec
,
8111 elf_section_data (sec
)->sec_info
,
8112 sym
->st_value
+ rel
->r_addend
);
8115 /* If we have changed the section, and our original section is
8116 marked with SEC_EXCLUDE, it means that the original
8117 SEC_MERGE section has been completely subsumed in some
8118 other SEC_MERGE section. In this case, we need to leave
8119 some info around for --emit-relocs. */
8120 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8121 sec
->kept_section
= *psec
;
8124 rel
->r_addend
-= relocation
;
8125 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8131 _bfd_elf_rel_local_sym (bfd
*abfd
,
8132 Elf_Internal_Sym
*sym
,
8136 asection
*sec
= *psec
;
8138 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8139 return sym
->st_value
+ addend
;
8141 return _bfd_merged_section_offset (abfd
, psec
,
8142 elf_section_data (sec
)->sec_info
,
8143 sym
->st_value
+ addend
);
8147 _bfd_elf_section_offset (bfd
*abfd
,
8148 struct bfd_link_info
*info
,
8152 switch (sec
->sec_info_type
)
8154 case ELF_INFO_TYPE_STABS
:
8155 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8157 case ELF_INFO_TYPE_EH_FRAME
:
8158 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8164 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8165 reconstruct an ELF file by reading the segments out of remote memory
8166 based on the ELF file header at EHDR_VMA and the ELF program headers it
8167 points to. If not null, *LOADBASEP is filled in with the difference
8168 between the VMAs from which the segments were read, and the VMAs the
8169 file headers (and hence BFD's idea of each section's VMA) put them at.
8171 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8172 remote memory at target address VMA into the local buffer at MYADDR; it
8173 should return zero on success or an `errno' code on failure. TEMPL must
8174 be a BFD for an ELF target with the word size and byte order found in
8175 the remote memory. */
8178 bfd_elf_bfd_from_remote_memory
8182 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8184 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8185 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8189 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8190 long symcount ATTRIBUTE_UNUSED
,
8191 asymbol
**syms ATTRIBUTE_UNUSED
,
8196 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8199 const char *relplt_name
;
8200 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8204 Elf_Internal_Shdr
*hdr
;
8210 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8213 if (dynsymcount
<= 0)
8216 if (!bed
->plt_sym_val
)
8219 relplt_name
= bed
->relplt_name
;
8220 if (relplt_name
== NULL
)
8221 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8222 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8226 hdr
= &elf_section_data (relplt
)->this_hdr
;
8227 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8228 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8231 plt
= bfd_get_section_by_name (abfd
, ".plt");
8235 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8236 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8239 count
= relplt
->size
/ hdr
->sh_entsize
;
8240 size
= count
* sizeof (asymbol
);
8241 p
= relplt
->relocation
;
8242 for (i
= 0; i
< count
; i
++, s
++, p
++)
8243 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8245 s
= *ret
= bfd_malloc (size
);
8249 names
= (char *) (s
+ count
);
8250 p
= relplt
->relocation
;
8252 for (i
= 0; i
< count
; i
++, s
++, p
++)
8257 addr
= bed
->plt_sym_val (i
, plt
, p
);
8258 if (addr
== (bfd_vma
) -1)
8261 *s
= **p
->sym_ptr_ptr
;
8262 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8263 we are defining a symbol, ensure one of them is set. */
8264 if ((s
->flags
& BSF_LOCAL
) == 0)
8265 s
->flags
|= BSF_GLOBAL
;
8267 s
->value
= addr
- plt
->vma
;
8269 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8270 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8272 memcpy (names
, "@plt", sizeof ("@plt"));
8273 names
+= sizeof ("@plt");
8280 /* Sort symbol by binding and section. We want to put definitions
8281 sorted by section at the beginning. */
8284 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8286 const Elf_Internal_Sym
*s1
;
8287 const Elf_Internal_Sym
*s2
;
8290 /* Make sure that undefined symbols are at the end. */
8291 s1
= (const Elf_Internal_Sym
*) arg1
;
8292 if (s1
->st_shndx
== SHN_UNDEF
)
8294 s2
= (const Elf_Internal_Sym
*) arg2
;
8295 if (s2
->st_shndx
== SHN_UNDEF
)
8298 /* Sorted by section index. */
8299 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8303 /* Sorted by binding. */
8304 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8309 Elf_Internal_Sym
*sym
;
8314 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8316 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8317 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8318 return strcmp (s1
->name
, s2
->name
);
8321 /* Check if 2 sections define the same set of local and global
8325 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8328 const struct elf_backend_data
*bed1
, *bed2
;
8329 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8330 bfd_size_type symcount1
, symcount2
;
8331 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8332 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8333 Elf_Internal_Sym
*isymend
;
8334 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8335 bfd_size_type count1
, count2
, i
;
8342 /* If both are .gnu.linkonce sections, they have to have the same
8344 if (strncmp (sec1
->name
, ".gnu.linkonce",
8345 sizeof ".gnu.linkonce" - 1) == 0
8346 && strncmp (sec2
->name
, ".gnu.linkonce",
8347 sizeof ".gnu.linkonce" - 1) == 0)
8348 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8349 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8351 /* Both sections have to be in ELF. */
8352 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8353 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8356 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8359 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8360 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8362 /* If both are members of section groups, they have to have the
8364 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8368 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8369 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8370 if (shndx1
== -1 || shndx2
== -1)
8373 bed1
= get_elf_backend_data (bfd1
);
8374 bed2
= get_elf_backend_data (bfd2
);
8375 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8376 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8377 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8378 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8380 if (symcount1
== 0 || symcount2
== 0)
8383 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8385 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8389 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8392 /* Sort symbols by binding and section. Global definitions are at
8394 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8395 elf_sort_elf_symbol
);
8396 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8397 elf_sort_elf_symbol
);
8399 /* Count definitions in the section. */
8401 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8402 isym
< isymend
; isym
++)
8404 if (isym
->st_shndx
== (unsigned int) shndx1
)
8411 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8416 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8417 isym
< isymend
; isym
++)
8419 if (isym
->st_shndx
== (unsigned int) shndx2
)
8426 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8430 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8433 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8434 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8436 if (symtable1
== NULL
|| symtable2
== NULL
)
8440 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8441 isym
< isymend
; isym
++)
8444 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8451 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8452 isym
< isymend
; isym
++)
8455 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8461 /* Sort symbol by name. */
8462 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8463 elf_sym_name_compare
);
8464 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8465 elf_sym_name_compare
);
8467 for (i
= 0; i
< count1
; i
++)
8468 /* Two symbols must have the same binding, type and name. */
8469 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8470 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8471 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8489 /* It is only used by x86-64 so far. */
8490 asection _bfd_elf_large_com_section
8491 = BFD_FAKE_SECTION (_bfd_elf_large_com_section
,
8492 SEC_IS_COMMON
, NULL
, NULL
, "LARGE_COMMON",
8495 /* Return TRUE if 2 section types are compatible. */
8498 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
8499 bfd
*bbfd
, const asection
*bsec
)
8503 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
8504 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8507 return elf_section_type (asec
) == elf_section_type (bsec
);