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 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2769 struct bfd_link_order
*o
;
2771 this_hdr
->sh_size
= 0;
2772 for (o
= asect
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
2773 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2774 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2775 if (this_hdr
->sh_size
)
2776 this_hdr
->sh_type
= SHT_NOBITS
;
2780 /* Check for processor-specific section types. */
2781 if (bed
->elf_backend_fake_sections
2782 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2785 /* If the section has relocs, set up a section header for the
2786 SHT_REL[A] section. If two relocation sections are required for
2787 this section, it is up to the processor-specific back-end to
2788 create the other. */
2789 if ((asect
->flags
& SEC_RELOC
) != 0
2790 && !_bfd_elf_init_reloc_shdr (abfd
,
2791 &elf_section_data (asect
)->rel_hdr
,
2797 /* Fill in the contents of a SHT_GROUP section. */
2800 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2802 bfd_boolean
*failedptr
= failedptrarg
;
2803 unsigned long symindx
;
2804 asection
*elt
, *first
;
2808 /* Ignore linker created group section. See elfNN_ia64_object_p in
2810 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2815 if (elf_group_id (sec
) != NULL
)
2816 symindx
= elf_group_id (sec
)->udata
.i
;
2820 /* If called from the assembler, swap_out_syms will have set up
2821 elf_section_syms; If called for "ld -r", use target_index. */
2822 if (elf_section_syms (abfd
) != NULL
)
2823 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2825 symindx
= sec
->target_index
;
2827 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2829 /* The contents won't be allocated for "ld -r" or objcopy. */
2831 if (sec
->contents
== NULL
)
2834 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2836 /* Arrange for the section to be written out. */
2837 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2838 if (sec
->contents
== NULL
)
2845 loc
= sec
->contents
+ sec
->size
;
2847 /* Get the pointer to the first section in the group that gas
2848 squirreled away here. objcopy arranges for this to be set to the
2849 start of the input section group. */
2850 first
= elt
= elf_next_in_group (sec
);
2852 /* First element is a flag word. Rest of section is elf section
2853 indices for all the sections of the group. Write them backwards
2854 just to keep the group in the same order as given in .section
2855 directives, not that it matters. */
2864 s
= s
->output_section
;
2867 idx
= elf_section_data (s
)->this_idx
;
2868 H_PUT_32 (abfd
, idx
, loc
);
2869 elt
= elf_next_in_group (elt
);
2874 if ((loc
-= 4) != sec
->contents
)
2877 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2880 /* Assign all ELF section numbers. The dummy first section is handled here
2881 too. The link/info pointers for the standard section types are filled
2882 in here too, while we're at it. */
2885 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2887 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2889 unsigned int section_number
, secn
;
2890 Elf_Internal_Shdr
**i_shdrp
;
2891 struct bfd_elf_section_data
*d
;
2895 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2897 /* SHT_GROUP sections are in relocatable files only. */
2898 if (link_info
== NULL
|| link_info
->relocatable
)
2900 /* Put SHT_GROUP sections first. */
2901 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2903 d
= elf_section_data (sec
);
2905 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2907 if (sec
->flags
& SEC_LINKER_CREATED
)
2909 /* Remove the linker created SHT_GROUP sections. */
2910 bfd_section_list_remove (abfd
, sec
);
2911 abfd
->section_count
--;
2915 if (section_number
== SHN_LORESERVE
)
2916 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2917 d
->this_idx
= section_number
++;
2923 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2925 d
= elf_section_data (sec
);
2927 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2929 if (section_number
== SHN_LORESERVE
)
2930 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2931 d
->this_idx
= section_number
++;
2933 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2934 if ((sec
->flags
& SEC_RELOC
) == 0)
2938 if (section_number
== SHN_LORESERVE
)
2939 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2940 d
->rel_idx
= section_number
++;
2941 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2946 if (section_number
== SHN_LORESERVE
)
2947 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2948 d
->rel_idx2
= section_number
++;
2949 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2955 if (section_number
== SHN_LORESERVE
)
2956 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2957 t
->shstrtab_section
= section_number
++;
2958 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2959 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2961 if (bfd_get_symcount (abfd
) > 0)
2963 if (section_number
== SHN_LORESERVE
)
2964 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2965 t
->symtab_section
= section_number
++;
2966 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2967 if (section_number
> SHN_LORESERVE
- 2)
2969 if (section_number
== SHN_LORESERVE
)
2970 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2971 t
->symtab_shndx_section
= section_number
++;
2972 t
->symtab_shndx_hdr
.sh_name
2973 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2974 ".symtab_shndx", FALSE
);
2975 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2978 if (section_number
== SHN_LORESERVE
)
2979 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2980 t
->strtab_section
= section_number
++;
2981 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2984 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2985 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2987 elf_numsections (abfd
) = section_number
;
2988 elf_elfheader (abfd
)->e_shnum
= section_number
;
2989 if (section_number
> SHN_LORESERVE
)
2990 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2992 /* Set up the list of section header pointers, in agreement with the
2994 i_shdrp
= bfd_zalloc2 (abfd
, section_number
, sizeof (Elf_Internal_Shdr
*));
2995 if (i_shdrp
== NULL
)
2998 i_shdrp
[0] = bfd_zalloc (abfd
, sizeof (Elf_Internal_Shdr
));
2999 if (i_shdrp
[0] == NULL
)
3001 bfd_release (abfd
, i_shdrp
);
3005 elf_elfsections (abfd
) = i_shdrp
;
3007 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
3008 if (bfd_get_symcount (abfd
) > 0)
3010 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
3011 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3013 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
3014 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
3016 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
3017 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
3020 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
3022 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3026 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3027 if (d
->rel_idx
!= 0)
3028 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3029 if (d
->rel_idx2
!= 0)
3030 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3032 /* Fill in the sh_link and sh_info fields while we're at it. */
3034 /* sh_link of a reloc section is the section index of the symbol
3035 table. sh_info is the section index of the section to which
3036 the relocation entries apply. */
3037 if (d
->rel_idx
!= 0)
3039 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3040 d
->rel_hdr
.sh_info
= d
->this_idx
;
3042 if (d
->rel_idx2
!= 0)
3044 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3045 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3048 /* We need to set up sh_link for SHF_LINK_ORDER. */
3049 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3051 s
= elf_linked_to_section (sec
);
3054 if (link_info
!= NULL
)
3056 /* For linker, elf_linked_to_section points to the
3058 if (elf_discarded_section (s
))
3061 (*_bfd_error_handler
)
3062 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3063 abfd
, d
->this_hdr
.bfd_section
,
3065 /* Point to the kept section if it has the same
3066 size as the discarded one. */
3067 kept
= _bfd_elf_check_kept_section (s
);
3070 bfd_set_error (bfd_error_bad_value
);
3075 s
= s
->output_section
;
3076 BFD_ASSERT (s
!= NULL
);
3078 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3083 The Intel C compiler generates SHT_IA_64_UNWIND with
3084 SHF_LINK_ORDER. But it doesn't set the sh_link or
3085 sh_info fields. Hence we could get the situation
3087 const struct elf_backend_data
*bed
3088 = get_elf_backend_data (abfd
);
3089 if (bed
->link_order_error_handler
)
3090 bed
->link_order_error_handler
3091 (_("%B: warning: sh_link not set for section `%A'"),
3096 switch (d
->this_hdr
.sh_type
)
3100 /* A reloc section which we are treating as a normal BFD
3101 section. sh_link is the section index of the symbol
3102 table. sh_info is the section index of the section to
3103 which the relocation entries apply. We assume that an
3104 allocated reloc section uses the dynamic symbol table.
3105 FIXME: How can we be sure? */
3106 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3108 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3110 /* We look up the section the relocs apply to by name. */
3112 if (d
->this_hdr
.sh_type
== SHT_REL
)
3116 s
= bfd_get_section_by_name (abfd
, name
);
3118 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3122 /* We assume that a section named .stab*str is a stabs
3123 string section. We look for a section with the same name
3124 but without the trailing ``str'', and set its sh_link
3125 field to point to this section. */
3126 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3127 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3132 len
= strlen (sec
->name
);
3133 alc
= bfd_malloc (len
- 2);
3136 memcpy (alc
, sec
->name
, len
- 3);
3137 alc
[len
- 3] = '\0';
3138 s
= bfd_get_section_by_name (abfd
, alc
);
3142 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3144 /* This is a .stab section. */
3145 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3146 elf_section_data (s
)->this_hdr
.sh_entsize
3147 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3154 case SHT_GNU_verneed
:
3155 case SHT_GNU_verdef
:
3156 /* sh_link is the section header index of the string table
3157 used for the dynamic entries, or the symbol table, or the
3159 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3161 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3164 case SHT_GNU_LIBLIST
:
3165 /* sh_link is the section header index of the prelink library
3167 used for the dynamic entries, or the symbol table, or the
3169 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3170 ? ".dynstr" : ".gnu.libstr");
3172 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3176 case SHT_GNU_versym
:
3177 /* sh_link is the section header index of the symbol table
3178 this hash table or version table is for. */
3179 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3181 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3185 d
->this_hdr
.sh_link
= t
->symtab_section
;
3189 for (secn
= 1; secn
< section_number
; ++secn
)
3190 if (i_shdrp
[secn
] == NULL
)
3191 i_shdrp
[secn
] = i_shdrp
[0];
3193 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3194 i_shdrp
[secn
]->sh_name
);
3198 /* Map symbol from it's internal number to the external number, moving
3199 all local symbols to be at the head of the list. */
3202 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3204 /* If the backend has a special mapping, use it. */
3205 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3206 if (bed
->elf_backend_sym_is_global
)
3207 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3209 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3210 || bfd_is_und_section (bfd_get_section (sym
))
3211 || bfd_is_com_section (bfd_get_section (sym
)));
3215 elf_map_symbols (bfd
*abfd
)
3217 unsigned int symcount
= bfd_get_symcount (abfd
);
3218 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3219 asymbol
**sect_syms
;
3220 unsigned int num_locals
= 0;
3221 unsigned int num_globals
= 0;
3222 unsigned int num_locals2
= 0;
3223 unsigned int num_globals2
= 0;
3230 fprintf (stderr
, "elf_map_symbols\n");
3234 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3236 if (max_index
< asect
->index
)
3237 max_index
= asect
->index
;
3241 sect_syms
= bfd_zalloc2 (abfd
, max_index
, sizeof (asymbol
*));
3242 if (sect_syms
== NULL
)
3244 elf_section_syms (abfd
) = sect_syms
;
3245 elf_num_section_syms (abfd
) = max_index
;
3247 /* Init sect_syms entries for any section symbols we have already
3248 decided to output. */
3249 for (idx
= 0; idx
< symcount
; idx
++)
3251 asymbol
*sym
= syms
[idx
];
3253 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3260 if (sec
->owner
!= NULL
)
3262 if (sec
->owner
!= abfd
)
3264 if (sec
->output_offset
!= 0)
3267 sec
= sec
->output_section
;
3269 /* Empty sections in the input files may have had a
3270 section symbol created for them. (See the comment
3271 near the end of _bfd_generic_link_output_symbols in
3272 linker.c). If the linker script discards such
3273 sections then we will reach this point. Since we know
3274 that we cannot avoid this case, we detect it and skip
3275 the abort and the assignment to the sect_syms array.
3276 To reproduce this particular case try running the
3277 linker testsuite test ld-scripts/weak.exp for an ELF
3278 port that uses the generic linker. */
3279 if (sec
->owner
== NULL
)
3282 BFD_ASSERT (sec
->owner
== abfd
);
3284 sect_syms
[sec
->index
] = syms
[idx
];
3289 /* Classify all of the symbols. */
3290 for (idx
= 0; idx
< symcount
; idx
++)
3292 if (!sym_is_global (abfd
, syms
[idx
]))
3298 /* We will be adding a section symbol for each BFD section. Most normal
3299 sections will already have a section symbol in outsymbols, but
3300 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3301 at least in that case. */
3302 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3304 if (sect_syms
[asect
->index
] == NULL
)
3306 if (!sym_is_global (abfd
, asect
->symbol
))
3313 /* Now sort the symbols so the local symbols are first. */
3314 new_syms
= bfd_alloc2 (abfd
, num_locals
+ num_globals
, sizeof (asymbol
*));
3316 if (new_syms
== NULL
)
3319 for (idx
= 0; idx
< symcount
; idx
++)
3321 asymbol
*sym
= syms
[idx
];
3324 if (!sym_is_global (abfd
, sym
))
3327 i
= num_locals
+ num_globals2
++;
3329 sym
->udata
.i
= i
+ 1;
3331 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3333 if (sect_syms
[asect
->index
] == NULL
)
3335 asymbol
*sym
= asect
->symbol
;
3338 sect_syms
[asect
->index
] = sym
;
3339 if (!sym_is_global (abfd
, sym
))
3342 i
= num_locals
+ num_globals2
++;
3344 sym
->udata
.i
= i
+ 1;
3348 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3350 elf_num_locals (abfd
) = num_locals
;
3351 elf_num_globals (abfd
) = num_globals
;
3355 /* Align to the maximum file alignment that could be required for any
3356 ELF data structure. */
3358 static inline file_ptr
3359 align_file_position (file_ptr off
, int align
)
3361 return (off
+ align
- 1) & ~(align
- 1);
3364 /* Assign a file position to a section, optionally aligning to the
3365 required section alignment. */
3368 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3376 al
= i_shdrp
->sh_addralign
;
3378 offset
= BFD_ALIGN (offset
, al
);
3380 i_shdrp
->sh_offset
= offset
;
3381 if (i_shdrp
->bfd_section
!= NULL
)
3382 i_shdrp
->bfd_section
->filepos
= offset
;
3383 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3384 offset
+= i_shdrp
->sh_size
;
3388 /* Compute the file positions we are going to put the sections at, and
3389 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3390 is not NULL, this is being called by the ELF backend linker. */
3393 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3394 struct bfd_link_info
*link_info
)
3396 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3398 struct bfd_strtab_hash
*strtab
= NULL
;
3399 Elf_Internal_Shdr
*shstrtab_hdr
;
3401 if (abfd
->output_has_begun
)
3404 /* Do any elf backend specific processing first. */
3405 if (bed
->elf_backend_begin_write_processing
)
3406 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3408 if (! prep_headers (abfd
))
3411 /* Post process the headers if necessary. */
3412 if (bed
->elf_backend_post_process_headers
)
3413 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3416 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3420 if (!assign_section_numbers (abfd
, link_info
))
3423 /* The backend linker builds symbol table information itself. */
3424 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3426 /* Non-zero if doing a relocatable link. */
3427 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3429 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3433 if (link_info
== NULL
)
3435 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3440 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3441 /* sh_name was set in prep_headers. */
3442 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3443 shstrtab_hdr
->sh_flags
= 0;
3444 shstrtab_hdr
->sh_addr
= 0;
3445 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3446 shstrtab_hdr
->sh_entsize
= 0;
3447 shstrtab_hdr
->sh_link
= 0;
3448 shstrtab_hdr
->sh_info
= 0;
3449 /* sh_offset is set in assign_file_positions_except_relocs. */
3450 shstrtab_hdr
->sh_addralign
= 1;
3452 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3455 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3458 Elf_Internal_Shdr
*hdr
;
3460 off
= elf_tdata (abfd
)->next_file_pos
;
3462 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3463 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3465 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3466 if (hdr
->sh_size
!= 0)
3467 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3469 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3470 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3472 elf_tdata (abfd
)->next_file_pos
= off
;
3474 /* Now that we know where the .strtab section goes, write it
3476 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3477 || ! _bfd_stringtab_emit (abfd
, strtab
))
3479 _bfd_stringtab_free (strtab
);
3482 abfd
->output_has_begun
= TRUE
;
3487 /* Create a mapping from a set of sections to a program segment. */
3489 static struct elf_segment_map
*
3490 make_mapping (bfd
*abfd
,
3491 asection
**sections
,
3496 struct elf_segment_map
*m
;
3501 amt
= sizeof (struct elf_segment_map
);
3502 amt
+= (to
- from
- 1) * sizeof (asection
*);
3503 m
= bfd_zalloc (abfd
, amt
);
3507 m
->p_type
= PT_LOAD
;
3508 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3509 m
->sections
[i
- from
] = *hdrpp
;
3510 m
->count
= to
- from
;
3512 if (from
== 0 && phdr
)
3514 /* Include the headers in the first PT_LOAD segment. */
3515 m
->includes_filehdr
= 1;
3516 m
->includes_phdrs
= 1;
3522 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3525 struct elf_segment_map
*
3526 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3528 struct elf_segment_map
*m
;
3530 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3534 m
->p_type
= PT_DYNAMIC
;
3536 m
->sections
[0] = dynsec
;
3541 /* Set up a mapping from BFD sections to program segments. */
3544 map_sections_to_segments (bfd
*abfd
)
3546 asection
**sections
= NULL
;
3550 struct elf_segment_map
*mfirst
;
3551 struct elf_segment_map
**pm
;
3552 struct elf_segment_map
*m
;
3555 unsigned int phdr_index
;
3556 bfd_vma maxpagesize
;
3558 bfd_boolean phdr_in_segment
= TRUE
;
3559 bfd_boolean writable
;
3561 asection
*first_tls
= NULL
;
3562 asection
*dynsec
, *eh_frame_hdr
;
3565 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3568 if (bfd_count_sections (abfd
) == 0)
3571 /* Select the allocated sections, and sort them. */
3573 sections
= bfd_malloc2 (bfd_count_sections (abfd
), sizeof (asection
*));
3574 if (sections
== NULL
)
3578 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3580 if ((s
->flags
& SEC_ALLOC
) != 0)
3586 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3589 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3591 /* Build the mapping. */
3596 /* If we have a .interp section, then create a PT_PHDR segment for
3597 the program headers and a PT_INTERP segment for the .interp
3599 s
= bfd_get_section_by_name (abfd
, ".interp");
3600 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3602 amt
= sizeof (struct elf_segment_map
);
3603 m
= bfd_zalloc (abfd
, amt
);
3607 m
->p_type
= PT_PHDR
;
3608 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3609 m
->p_flags
= PF_R
| PF_X
;
3610 m
->p_flags_valid
= 1;
3611 m
->includes_phdrs
= 1;
3616 amt
= sizeof (struct elf_segment_map
);
3617 m
= bfd_zalloc (abfd
, amt
);
3621 m
->p_type
= PT_INTERP
;
3629 /* Look through the sections. We put sections in the same program
3630 segment when the start of the second section can be placed within
3631 a few bytes of the end of the first section. */
3635 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3637 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3639 && (dynsec
->flags
& SEC_LOAD
) == 0)
3642 /* Deal with -Ttext or something similar such that the first section
3643 is not adjacent to the program headers. This is an
3644 approximation, since at this point we don't know exactly how many
3645 program headers we will need. */
3648 bfd_size_type phdr_size
;
3650 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3652 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3653 if ((abfd
->flags
& D_PAGED
) == 0
3654 || sections
[0]->lma
< phdr_size
3655 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3656 phdr_in_segment
= FALSE
;
3659 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3662 bfd_boolean new_segment
;
3666 /* See if this section and the last one will fit in the same
3669 if (last_hdr
== NULL
)
3671 /* If we don't have a segment yet, then we don't need a new
3672 one (we build the last one after this loop). */
3673 new_segment
= FALSE
;
3675 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3677 /* If this section has a different relation between the
3678 virtual address and the load address, then we need a new
3682 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3683 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3685 /* If putting this section in this segment would force us to
3686 skip a page in the segment, then we need a new segment. */
3689 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3690 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3692 /* We don't want to put a loadable section after a
3693 nonloadable section in the same segment.
3694 Consider .tbss sections as loadable for this purpose. */
3697 else if ((abfd
->flags
& D_PAGED
) == 0)
3699 /* If the file is not demand paged, which means that we
3700 don't require the sections to be correctly aligned in the
3701 file, then there is no other reason for a new segment. */
3702 new_segment
= FALSE
;
3705 && (hdr
->flags
& SEC_READONLY
) == 0
3706 && (((last_hdr
->lma
+ last_size
- 1)
3707 & ~(maxpagesize
- 1))
3708 != (hdr
->lma
& ~(maxpagesize
- 1))))
3710 /* We don't want to put a writable section in a read only
3711 segment, unless they are on the same page in memory
3712 anyhow. We already know that the last section does not
3713 bring us past the current section on the page, so the
3714 only case in which the new section is not on the same
3715 page as the previous section is when the previous section
3716 ends precisely on a page boundary. */
3721 /* Otherwise, we can use the same segment. */
3722 new_segment
= FALSE
;
3727 if ((hdr
->flags
& SEC_READONLY
) == 0)
3730 /* .tbss sections effectively have zero size. */
3731 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3732 last_size
= hdr
->size
;
3738 /* We need a new program segment. We must create a new program
3739 header holding all the sections from phdr_index until hdr. */
3741 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3748 if ((hdr
->flags
& SEC_READONLY
) == 0)
3754 /* .tbss sections effectively have zero size. */
3755 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3756 last_size
= hdr
->size
;
3760 phdr_in_segment
= FALSE
;
3763 /* Create a final PT_LOAD program segment. */
3764 if (last_hdr
!= NULL
)
3766 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3774 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3777 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3784 /* For each loadable .note section, add a PT_NOTE segment. We don't
3785 use bfd_get_section_by_name, because if we link together
3786 nonloadable .note sections and loadable .note sections, we will
3787 generate two .note sections in the output file. FIXME: Using
3788 names for section types is bogus anyhow. */
3789 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3791 if ((s
->flags
& SEC_LOAD
) != 0
3792 && strncmp (s
->name
, ".note", 5) == 0)
3794 amt
= sizeof (struct elf_segment_map
);
3795 m
= bfd_zalloc (abfd
, amt
);
3799 m
->p_type
= PT_NOTE
;
3806 if (s
->flags
& SEC_THREAD_LOCAL
)
3814 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3819 amt
= sizeof (struct elf_segment_map
);
3820 amt
+= (tls_count
- 1) * sizeof (asection
*);
3821 m
= bfd_zalloc (abfd
, amt
);
3826 m
->count
= tls_count
;
3827 /* Mandated PF_R. */
3829 m
->p_flags_valid
= 1;
3830 for (i
= 0; i
< tls_count
; ++i
)
3832 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3833 m
->sections
[i
] = first_tls
;
3834 first_tls
= first_tls
->next
;
3841 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3843 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3844 if (eh_frame_hdr
!= NULL
3845 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3847 amt
= sizeof (struct elf_segment_map
);
3848 m
= bfd_zalloc (abfd
, amt
);
3852 m
->p_type
= PT_GNU_EH_FRAME
;
3854 m
->sections
[0] = eh_frame_hdr
->output_section
;
3860 if (elf_tdata (abfd
)->stack_flags
)
3862 amt
= sizeof (struct elf_segment_map
);
3863 m
= bfd_zalloc (abfd
, amt
);
3867 m
->p_type
= PT_GNU_STACK
;
3868 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3869 m
->p_flags_valid
= 1;
3875 if (elf_tdata (abfd
)->relro
)
3877 amt
= sizeof (struct elf_segment_map
);
3878 m
= bfd_zalloc (abfd
, amt
);
3882 m
->p_type
= PT_GNU_RELRO
;
3884 m
->p_flags_valid
= 1;
3893 elf_tdata (abfd
)->segment_map
= mfirst
;
3897 if (sections
!= NULL
)
3902 /* Sort sections by address. */
3905 elf_sort_sections (const void *arg1
, const void *arg2
)
3907 const asection
*sec1
= *(const asection
**) arg1
;
3908 const asection
*sec2
= *(const asection
**) arg2
;
3909 bfd_size_type size1
, size2
;
3911 /* Sort by LMA first, since this is the address used to
3912 place the section into a segment. */
3913 if (sec1
->lma
< sec2
->lma
)
3915 else if (sec1
->lma
> sec2
->lma
)
3918 /* Then sort by VMA. Normally the LMA and the VMA will be
3919 the same, and this will do nothing. */
3920 if (sec1
->vma
< sec2
->vma
)
3922 else if (sec1
->vma
> sec2
->vma
)
3925 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3927 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3933 /* If the indicies are the same, do not return 0
3934 here, but continue to try the next comparison. */
3935 if (sec1
->target_index
- sec2
->target_index
!= 0)
3936 return sec1
->target_index
- sec2
->target_index
;
3941 else if (TOEND (sec2
))
3946 /* Sort by size, to put zero sized sections
3947 before others at the same address. */
3949 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3950 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3957 return sec1
->target_index
- sec2
->target_index
;
3960 /* Ian Lance Taylor writes:
3962 We shouldn't be using % with a negative signed number. That's just
3963 not good. We have to make sure either that the number is not
3964 negative, or that the number has an unsigned type. When the types
3965 are all the same size they wind up as unsigned. When file_ptr is a
3966 larger signed type, the arithmetic winds up as signed long long,
3969 What we're trying to say here is something like ``increase OFF by
3970 the least amount that will cause it to be equal to the VMA modulo
3972 /* In other words, something like:
3974 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3975 off_offset = off % bed->maxpagesize;
3976 if (vma_offset < off_offset)
3977 adjustment = vma_offset + bed->maxpagesize - off_offset;
3979 adjustment = vma_offset - off_offset;
3981 which can can be collapsed into the expression below. */
3984 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3986 return ((vma
- off
) % maxpagesize
);
3989 /* Assign file positions to the sections based on the mapping from
3990 sections to segments. This function also sets up some fields in
3991 the file header, and writes out the program headers. */
3994 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3996 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3998 struct elf_segment_map
*m
;
4000 Elf_Internal_Phdr
*phdrs
;
4002 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4003 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4004 Elf_Internal_Phdr
*p
;
4006 if (elf_tdata (abfd
)->segment_map
== NULL
)
4008 if (! map_sections_to_segments (abfd
))
4013 /* The placement algorithm assumes that non allocated sections are
4014 not in PT_LOAD segments. We ensure this here by removing such
4015 sections from the segment map. We also remove excluded
4017 for (m
= elf_tdata (abfd
)->segment_map
;
4021 unsigned int new_count
;
4025 for (i
= 0; i
< m
->count
; i
++)
4027 if ((m
->sections
[i
]->flags
& SEC_EXCLUDE
) == 0
4028 && ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0
4029 || m
->p_type
!= PT_LOAD
))
4032 m
->sections
[new_count
] = m
->sections
[i
];
4038 if (new_count
!= m
->count
)
4039 m
->count
= new_count
;
4043 if (bed
->elf_backend_modify_segment_map
)
4045 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4050 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4053 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4054 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4055 elf_elfheader (abfd
)->e_phnum
= count
;
4059 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4063 /* If we already counted the number of program segments, make sure
4064 that we allocated enough space. This happens when SIZEOF_HEADERS
4065 is used in a linker script. */
4066 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4067 if (alloc
!= 0 && count
> alloc
)
4069 ((*_bfd_error_handler
)
4070 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4071 abfd
, alloc
, count
));
4072 bfd_set_error (bfd_error_bad_value
);
4079 phdrs
= bfd_alloc2 (abfd
, alloc
, sizeof (Elf_Internal_Phdr
));
4083 off
= bed
->s
->sizeof_ehdr
;
4084 off
+= alloc
* bed
->s
->sizeof_phdr
;
4091 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4098 /* If elf_segment_map is not from map_sections_to_segments, the
4099 sections may not be correctly ordered. NOTE: sorting should
4100 not be done to the PT_NOTE section of a corefile, which may
4101 contain several pseudo-sections artificially created by bfd.
4102 Sorting these pseudo-sections breaks things badly. */
4104 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4105 && m
->p_type
== PT_NOTE
))
4106 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4109 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4110 number of sections with contents contributing to both p_filesz
4111 and p_memsz, followed by a number of sections with no contents
4112 that just contribute to p_memsz. In this loop, OFF tracks next
4113 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4114 an adjustment we use for segments that have no file contents
4115 but need zero filled memory allocation. */
4117 p
->p_type
= m
->p_type
;
4118 p
->p_flags
= m
->p_flags
;
4120 if (p
->p_type
== PT_LOAD
4123 bfd_size_type align
;
4125 unsigned int align_power
= 0;
4127 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4129 unsigned int secalign
;
4131 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4132 if (secalign
> align_power
)
4133 align_power
= secalign
;
4135 align
= (bfd_size_type
) 1 << align_power
;
4137 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> align
)
4138 align
= bed
->maxpagesize
;
4140 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4143 && !m
->includes_filehdr
4144 && !m
->includes_phdrs
4145 && (ufile_ptr
) off
>= align
)
4147 /* If the first section isn't loadable, the same holds for
4148 any other sections. Since the segment won't need file
4149 space, we can make p_offset overlap some prior segment.
4150 However, .tbss is special. If a segment starts with
4151 .tbss, we need to look at the next section to decide
4152 whether the segment has any loadable sections. */
4154 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4156 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4160 voff
= adjust
- align
;
4166 /* Make sure the .dynamic section is the first section in the
4167 PT_DYNAMIC segment. */
4168 else if (p
->p_type
== PT_DYNAMIC
4170 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4173 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4175 bfd_set_error (bfd_error_bad_value
);
4182 p
->p_vaddr
= m
->sections
[0]->vma
;
4184 if (m
->p_paddr_valid
)
4185 p
->p_paddr
= m
->p_paddr
;
4186 else if (m
->count
== 0)
4189 p
->p_paddr
= m
->sections
[0]->lma
;
4191 if (p
->p_type
== PT_LOAD
4192 && (abfd
->flags
& D_PAGED
) != 0)
4193 p
->p_align
= bed
->maxpagesize
;
4194 else if (m
->count
== 0)
4195 p
->p_align
= 1 << bed
->s
->log_file_align
;
4203 if (m
->includes_filehdr
)
4205 if (! m
->p_flags_valid
)
4208 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4209 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4212 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4214 if (p
->p_vaddr
< (bfd_vma
) off
)
4216 (*_bfd_error_handler
)
4217 (_("%B: Not enough room for program headers, try linking with -N"),
4219 bfd_set_error (bfd_error_bad_value
);
4224 if (! m
->p_paddr_valid
)
4227 if (p
->p_type
== PT_LOAD
)
4229 filehdr_vaddr
= p
->p_vaddr
;
4230 filehdr_paddr
= p
->p_paddr
;
4234 if (m
->includes_phdrs
)
4236 if (! m
->p_flags_valid
)
4239 if (m
->includes_filehdr
)
4241 if (p
->p_type
== PT_LOAD
)
4243 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4244 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4249 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4253 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4254 p
->p_vaddr
-= off
- p
->p_offset
;
4255 if (! m
->p_paddr_valid
)
4256 p
->p_paddr
-= off
- p
->p_offset
;
4259 if (p
->p_type
== PT_LOAD
)
4261 phdrs_vaddr
= p
->p_vaddr
;
4262 phdrs_paddr
= p
->p_paddr
;
4265 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4268 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4269 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4272 if (p
->p_type
== PT_LOAD
4273 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4275 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4276 p
->p_offset
= off
+ voff
;
4281 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4282 p
->p_filesz
+= adjust
;
4283 p
->p_memsz
+= adjust
;
4287 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4291 bfd_size_type align
;
4295 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4297 if (p
->p_type
== PT_LOAD
4298 || p
->p_type
== PT_TLS
)
4300 bfd_signed_vma adjust
;
4302 if ((flags
& SEC_LOAD
) != 0)
4304 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4307 (*_bfd_error_handler
)
4308 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4309 abfd
, sec
, (unsigned long) sec
->lma
);
4313 p
->p_filesz
+= adjust
;
4314 p
->p_memsz
+= adjust
;
4316 /* .tbss is special. It doesn't contribute to p_memsz of
4318 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4319 || p
->p_type
== PT_TLS
)
4321 /* The section VMA must equal the file position
4322 modulo the page size. */
4323 bfd_size_type page
= align
;
4324 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> page
)
4325 page
= bed
->maxpagesize
;
4326 adjust
= vma_page_aligned_bias (sec
->vma
,
4327 p
->p_vaddr
+ p
->p_memsz
,
4329 p
->p_memsz
+= adjust
;
4333 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4335 /* The section at i == 0 is the one that actually contains
4341 p
->p_filesz
= sec
->size
;
4347 /* The rest are fake sections that shouldn't be written. */
4356 if (p
->p_type
== PT_LOAD
)
4359 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4360 1997, and the exact reason for it isn't clear. One
4361 plausible explanation is that it is to work around
4362 a problem we have with linker scripts using data
4363 statements in NOLOAD sections. I don't think it
4364 makes a great deal of sense to have such a section
4365 assigned to a PT_LOAD segment, but apparently
4366 people do this. The data statement results in a
4367 bfd_data_link_order being built, and these need
4368 section contents to write into. Eventually, we get
4369 to _bfd_elf_write_object_contents which writes any
4370 section with contents to the output. Make room
4371 here for the write, so that following segments are
4373 if ((flags
& SEC_LOAD
) != 0
4374 || (flags
& SEC_HAS_CONTENTS
) != 0)
4378 if ((flags
& SEC_LOAD
) != 0)
4380 p
->p_filesz
+= sec
->size
;
4381 p
->p_memsz
+= sec
->size
;
4383 /* PR ld/594: Sections in note segments which are not loaded
4384 contribute to the file size but not the in-memory size. */
4385 else if (p
->p_type
== PT_NOTE
4386 && (flags
& SEC_HAS_CONTENTS
) != 0)
4387 p
->p_filesz
+= sec
->size
;
4389 /* .tbss is special. It doesn't contribute to p_memsz of
4391 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4392 || p
->p_type
== PT_TLS
)
4393 p
->p_memsz
+= sec
->size
;
4395 if (p
->p_type
== PT_TLS
4397 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4399 struct bfd_link_order
*o
;
4400 bfd_vma tbss_size
= 0;
4402 for (o
= sec
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
4403 if (tbss_size
< o
->offset
+ o
->size
)
4404 tbss_size
= o
->offset
+ o
->size
;
4406 p
->p_memsz
+= tbss_size
;
4409 if (align
> p
->p_align
4410 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4414 if (! m
->p_flags_valid
)
4417 if ((flags
& SEC_CODE
) != 0)
4419 if ((flags
& SEC_READONLY
) == 0)
4425 /* Now that we have set the section file positions, we can set up
4426 the file positions for the non PT_LOAD segments. */
4427 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4431 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4433 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4434 /* If the section has not yet been assigned a file position,
4435 do so now. The ARM BPABI requires that .dynamic section
4436 not be marked SEC_ALLOC because it is not part of any
4437 PT_LOAD segment, so it will not be processed above. */
4438 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4441 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4444 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4446 off
= (_bfd_elf_assign_file_position_for_section
4447 (i_shdrpp
[i
], off
, TRUE
));
4448 p
->p_filesz
= m
->sections
[0]->size
;
4450 p
->p_offset
= m
->sections
[0]->filepos
;
4454 if (m
->includes_filehdr
)
4456 p
->p_vaddr
= filehdr_vaddr
;
4457 if (! m
->p_paddr_valid
)
4458 p
->p_paddr
= filehdr_paddr
;
4460 else if (m
->includes_phdrs
)
4462 p
->p_vaddr
= phdrs_vaddr
;
4463 if (! m
->p_paddr_valid
)
4464 p
->p_paddr
= phdrs_paddr
;
4466 else if (p
->p_type
== PT_GNU_RELRO
)
4468 Elf_Internal_Phdr
*lp
;
4470 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4472 if (lp
->p_type
== PT_LOAD
4473 && lp
->p_vaddr
<= link_info
->relro_end
4474 && lp
->p_vaddr
>= link_info
->relro_start
4475 && lp
->p_vaddr
+ lp
->p_filesz
4476 >= link_info
->relro_end
)
4480 if (lp
< phdrs
+ count
4481 && link_info
->relro_end
> lp
->p_vaddr
)
4483 p
->p_vaddr
= lp
->p_vaddr
;
4484 p
->p_paddr
= lp
->p_paddr
;
4485 p
->p_offset
= lp
->p_offset
;
4486 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4487 p
->p_memsz
= p
->p_filesz
;
4489 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4493 memset (p
, 0, sizeof *p
);
4494 p
->p_type
= PT_NULL
;
4500 /* Clear out any program headers we allocated but did not use. */
4501 for (; count
< alloc
; count
++, p
++)
4503 memset (p
, 0, sizeof *p
);
4504 p
->p_type
= PT_NULL
;
4507 elf_tdata (abfd
)->phdr
= phdrs
;
4509 elf_tdata (abfd
)->next_file_pos
= off
;
4511 /* Write out the program headers. */
4512 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4513 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4519 /* Get the size of the program header.
4521 If this is called by the linker before any of the section VMA's are set, it
4522 can't calculate the correct value for a strange memory layout. This only
4523 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4524 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4525 data segment (exclusive of .interp and .dynamic).
4527 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4528 will be two segments. */
4530 static bfd_size_type
4531 get_program_header_size (bfd
*abfd
)
4535 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4537 /* We can't return a different result each time we're called. */
4538 if (elf_tdata (abfd
)->program_header_size
!= 0)
4539 return elf_tdata (abfd
)->program_header_size
;
4541 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4543 struct elf_segment_map
*m
;
4546 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4548 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4549 return elf_tdata (abfd
)->program_header_size
;
4552 /* Assume we will need exactly two PT_LOAD segments: one for text
4553 and one for data. */
4556 s
= bfd_get_section_by_name (abfd
, ".interp");
4557 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4559 /* If we have a loadable interpreter section, we need a
4560 PT_INTERP segment. In this case, assume we also need a
4561 PT_PHDR segment, although that may not be true for all
4566 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4568 /* We need a PT_DYNAMIC segment. */
4572 if (elf_tdata (abfd
)->eh_frame_hdr
)
4574 /* We need a PT_GNU_EH_FRAME segment. */
4578 if (elf_tdata (abfd
)->stack_flags
)
4580 /* We need a PT_GNU_STACK segment. */
4584 if (elf_tdata (abfd
)->relro
)
4586 /* We need a PT_GNU_RELRO segment. */
4590 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4592 if ((s
->flags
& SEC_LOAD
) != 0
4593 && strncmp (s
->name
, ".note", 5) == 0)
4595 /* We need a PT_NOTE segment. */
4600 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4602 if (s
->flags
& SEC_THREAD_LOCAL
)
4604 /* We need a PT_TLS segment. */
4610 /* Let the backend count up any program headers it might need. */
4611 if (bed
->elf_backend_additional_program_headers
)
4615 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4621 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4622 return elf_tdata (abfd
)->program_header_size
;
4625 /* Work out the file positions of all the sections. This is called by
4626 _bfd_elf_compute_section_file_positions. All the section sizes and
4627 VMAs must be known before this is called.
4629 Reloc sections come in two flavours: Those processed specially as
4630 "side-channel" data attached to a section to which they apply, and
4631 those that bfd doesn't process as relocations. The latter sort are
4632 stored in a normal bfd section by bfd_section_from_shdr. We don't
4633 consider the former sort here, unless they form part of the loadable
4634 image. Reloc sections not assigned here will be handled later by
4635 assign_file_positions_for_relocs.
4637 We also don't set the positions of the .symtab and .strtab here. */
4640 assign_file_positions_except_relocs (bfd
*abfd
,
4641 struct bfd_link_info
*link_info
)
4643 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4644 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4645 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4646 unsigned int num_sec
= elf_numsections (abfd
);
4648 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4650 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4651 && bfd_get_format (abfd
) != bfd_core
)
4653 Elf_Internal_Shdr
**hdrpp
;
4656 /* Start after the ELF header. */
4657 off
= i_ehdrp
->e_ehsize
;
4659 /* We are not creating an executable, which means that we are
4660 not creating a program header, and that the actual order of
4661 the sections in the file is unimportant. */
4662 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4664 Elf_Internal_Shdr
*hdr
;
4667 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4668 && hdr
->bfd_section
== NULL
)
4669 || i
== tdata
->symtab_section
4670 || i
== tdata
->symtab_shndx_section
4671 || i
== tdata
->strtab_section
)
4673 hdr
->sh_offset
= -1;
4676 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4678 if (i
== SHN_LORESERVE
- 1)
4680 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4681 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4688 Elf_Internal_Shdr
**hdrpp
;
4690 /* Assign file positions for the loaded sections based on the
4691 assignment of sections to segments. */
4692 if (! assign_file_positions_for_segments (abfd
, link_info
))
4695 /* Assign file positions for the other sections. */
4697 off
= elf_tdata (abfd
)->next_file_pos
;
4698 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4700 Elf_Internal_Shdr
*hdr
;
4703 if (hdr
->bfd_section
!= NULL
4704 && hdr
->bfd_section
->filepos
!= 0)
4705 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4706 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4708 ((*_bfd_error_handler
)
4709 (_("%B: warning: allocated section `%s' not in segment"),
4711 (hdr
->bfd_section
== NULL
4713 : hdr
->bfd_section
->name
)));
4714 if ((abfd
->flags
& D_PAGED
) != 0)
4715 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4718 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4720 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4723 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4724 && hdr
->bfd_section
== NULL
)
4725 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4726 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4727 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4728 hdr
->sh_offset
= -1;
4730 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4732 if (i
== SHN_LORESERVE
- 1)
4734 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4735 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4740 /* Place the section headers. */
4741 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4742 i_ehdrp
->e_shoff
= off
;
4743 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4745 elf_tdata (abfd
)->next_file_pos
= off
;
4751 prep_headers (bfd
*abfd
)
4753 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4754 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4755 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4756 struct elf_strtab_hash
*shstrtab
;
4757 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4759 i_ehdrp
= elf_elfheader (abfd
);
4760 i_shdrp
= elf_elfsections (abfd
);
4762 shstrtab
= _bfd_elf_strtab_init ();
4763 if (shstrtab
== NULL
)
4766 elf_shstrtab (abfd
) = shstrtab
;
4768 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4769 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4770 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4771 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4773 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4774 i_ehdrp
->e_ident
[EI_DATA
] =
4775 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4776 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4778 if ((abfd
->flags
& DYNAMIC
) != 0)
4779 i_ehdrp
->e_type
= ET_DYN
;
4780 else if ((abfd
->flags
& EXEC_P
) != 0)
4781 i_ehdrp
->e_type
= ET_EXEC
;
4782 else if (bfd_get_format (abfd
) == bfd_core
)
4783 i_ehdrp
->e_type
= ET_CORE
;
4785 i_ehdrp
->e_type
= ET_REL
;
4787 switch (bfd_get_arch (abfd
))
4789 case bfd_arch_unknown
:
4790 i_ehdrp
->e_machine
= EM_NONE
;
4793 /* There used to be a long list of cases here, each one setting
4794 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4795 in the corresponding bfd definition. To avoid duplication,
4796 the switch was removed. Machines that need special handling
4797 can generally do it in elf_backend_final_write_processing(),
4798 unless they need the information earlier than the final write.
4799 Such need can generally be supplied by replacing the tests for
4800 e_machine with the conditions used to determine it. */
4802 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4805 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4806 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4808 /* No program header, for now. */
4809 i_ehdrp
->e_phoff
= 0;
4810 i_ehdrp
->e_phentsize
= 0;
4811 i_ehdrp
->e_phnum
= 0;
4813 /* Each bfd section is section header entry. */
4814 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4815 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4817 /* If we're building an executable, we'll need a program header table. */
4818 if (abfd
->flags
& EXEC_P
)
4819 /* It all happens later. */
4823 i_ehdrp
->e_phentsize
= 0;
4825 i_ehdrp
->e_phoff
= 0;
4828 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4829 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4830 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4831 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4832 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4833 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4834 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4835 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4836 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4842 /* Assign file positions for all the reloc sections which are not part
4843 of the loadable file image. */
4846 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4849 unsigned int i
, num_sec
;
4850 Elf_Internal_Shdr
**shdrpp
;
4852 off
= elf_tdata (abfd
)->next_file_pos
;
4854 num_sec
= elf_numsections (abfd
);
4855 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4857 Elf_Internal_Shdr
*shdrp
;
4860 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4861 && shdrp
->sh_offset
== -1)
4862 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4865 elf_tdata (abfd
)->next_file_pos
= off
;
4869 _bfd_elf_write_object_contents (bfd
*abfd
)
4871 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4872 Elf_Internal_Ehdr
*i_ehdrp
;
4873 Elf_Internal_Shdr
**i_shdrp
;
4875 unsigned int count
, num_sec
;
4877 if (! abfd
->output_has_begun
4878 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4881 i_shdrp
= elf_elfsections (abfd
);
4882 i_ehdrp
= elf_elfheader (abfd
);
4885 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4889 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4891 /* After writing the headers, we need to write the sections too... */
4892 num_sec
= elf_numsections (abfd
);
4893 for (count
= 1; count
< num_sec
; count
++)
4895 if (bed
->elf_backend_section_processing
)
4896 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4897 if (i_shdrp
[count
]->contents
)
4899 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4901 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4902 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4905 if (count
== SHN_LORESERVE
- 1)
4906 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4909 /* Write out the section header names. */
4910 if (elf_shstrtab (abfd
) != NULL
4911 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4912 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4915 if (bed
->elf_backend_final_write_processing
)
4916 (*bed
->elf_backend_final_write_processing
) (abfd
,
4917 elf_tdata (abfd
)->linker
);
4919 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4923 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4925 /* Hopefully this can be done just like an object file. */
4926 return _bfd_elf_write_object_contents (abfd
);
4929 /* Given a section, search the header to find them. */
4932 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4934 const struct elf_backend_data
*bed
;
4937 if (elf_section_data (asect
) != NULL
4938 && elf_section_data (asect
)->this_idx
!= 0)
4939 return elf_section_data (asect
)->this_idx
;
4941 if (bfd_is_abs_section (asect
))
4943 else if (bfd_is_com_section (asect
))
4945 else if (bfd_is_und_section (asect
))
4950 bed
= get_elf_backend_data (abfd
);
4951 if (bed
->elf_backend_section_from_bfd_section
)
4955 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4960 bfd_set_error (bfd_error_nonrepresentable_section
);
4965 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4969 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4971 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4973 flagword flags
= asym_ptr
->flags
;
4975 /* When gas creates relocations against local labels, it creates its
4976 own symbol for the section, but does put the symbol into the
4977 symbol chain, so udata is 0. When the linker is generating
4978 relocatable output, this section symbol may be for one of the
4979 input sections rather than the output section. */
4980 if (asym_ptr
->udata
.i
== 0
4981 && (flags
& BSF_SECTION_SYM
)
4982 && asym_ptr
->section
)
4986 if (asym_ptr
->section
->output_section
!= NULL
)
4987 indx
= asym_ptr
->section
->output_section
->index
;
4989 indx
= asym_ptr
->section
->index
;
4990 if (indx
< elf_num_section_syms (abfd
)
4991 && elf_section_syms (abfd
)[indx
] != NULL
)
4992 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4995 idx
= asym_ptr
->udata
.i
;
4999 /* This case can occur when using --strip-symbol on a symbol
5000 which is used in a relocation entry. */
5001 (*_bfd_error_handler
)
5002 (_("%B: symbol `%s' required but not present"),
5003 abfd
, bfd_asymbol_name (asym_ptr
));
5004 bfd_set_error (bfd_error_no_symbols
);
5011 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5012 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5013 elf_symbol_flags (flags
));
5021 /* Copy private BFD data. This copies any program header information. */
5024 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5026 Elf_Internal_Ehdr
*iehdr
;
5027 struct elf_segment_map
*map
;
5028 struct elf_segment_map
*map_first
;
5029 struct elf_segment_map
**pointer_to_map
;
5030 Elf_Internal_Phdr
*segment
;
5033 unsigned int num_segments
;
5034 bfd_boolean phdr_included
= FALSE
;
5035 bfd_vma maxpagesize
;
5036 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5037 unsigned int phdr_adjust_num
= 0;
5038 const struct elf_backend_data
*bed
;
5040 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5041 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5044 if (elf_tdata (ibfd
)->phdr
== NULL
)
5047 bed
= get_elf_backend_data (ibfd
);
5048 iehdr
= elf_elfheader (ibfd
);
5051 pointer_to_map
= &map_first
;
5053 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5054 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5056 /* Returns the end address of the segment + 1. */
5057 #define SEGMENT_END(segment, start) \
5058 (start + (segment->p_memsz > segment->p_filesz \
5059 ? segment->p_memsz : segment->p_filesz))
5061 #define SECTION_SIZE(section, segment) \
5062 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5063 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5064 ? section->size : 0)
5066 /* Returns TRUE if the given section is contained within
5067 the given segment. VMA addresses are compared. */
5068 #define IS_CONTAINED_BY_VMA(section, segment) \
5069 (section->vma >= segment->p_vaddr \
5070 && (section->vma + SECTION_SIZE (section, segment) \
5071 <= (SEGMENT_END (segment, segment->p_vaddr))))
5073 /* Returns TRUE if the given section is contained within
5074 the given segment. LMA addresses are compared. */
5075 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5076 (section->lma >= base \
5077 && (section->lma + SECTION_SIZE (section, segment) \
5078 <= SEGMENT_END (segment, base)))
5080 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5081 #define IS_COREFILE_NOTE(p, s) \
5082 (p->p_type == PT_NOTE \
5083 && bfd_get_format (ibfd) == bfd_core \
5084 && s->vma == 0 && s->lma == 0 \
5085 && (bfd_vma) s->filepos >= p->p_offset \
5086 && ((bfd_vma) s->filepos + s->size \
5087 <= p->p_offset + p->p_filesz))
5089 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5090 linker, which generates a PT_INTERP section with p_vaddr and
5091 p_memsz set to 0. */
5092 #define IS_SOLARIS_PT_INTERP(p, s) \
5094 && p->p_paddr == 0 \
5095 && p->p_memsz == 0 \
5096 && p->p_filesz > 0 \
5097 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5099 && (bfd_vma) s->filepos >= p->p_offset \
5100 && ((bfd_vma) s->filepos + s->size \
5101 <= p->p_offset + p->p_filesz))
5103 /* Decide if the given section should be included in the given segment.
5104 A section will be included if:
5105 1. It is within the address space of the segment -- we use the LMA
5106 if that is set for the segment and the VMA otherwise,
5107 2. It is an allocated segment,
5108 3. There is an output section associated with it,
5109 4. The section has not already been allocated to a previous segment.
5110 5. PT_GNU_STACK segments do not include any sections.
5111 6. PT_TLS segment includes only SHF_TLS sections.
5112 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5113 8. PT_DYNAMIC should not contain empty sections at the beginning
5114 (with the possible exception of .dynamic). */
5115 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5116 ((((segment->p_paddr \
5117 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5118 : IS_CONTAINED_BY_VMA (section, segment)) \
5119 && (section->flags & SEC_ALLOC) != 0) \
5120 || IS_COREFILE_NOTE (segment, section)) \
5121 && section->output_section != NULL \
5122 && segment->p_type != PT_GNU_STACK \
5123 && (segment->p_type != PT_TLS \
5124 || (section->flags & SEC_THREAD_LOCAL)) \
5125 && (segment->p_type == PT_LOAD \
5126 || segment->p_type == PT_TLS \
5127 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5128 && (segment->p_type != PT_DYNAMIC \
5129 || SECTION_SIZE (section, segment) > 0 \
5130 || (segment->p_paddr \
5131 ? segment->p_paddr != section->lma \
5132 : segment->p_vaddr != section->vma) \
5133 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5135 && ! section->segment_mark)
5137 /* Returns TRUE iff seg1 starts after the end of seg2. */
5138 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5139 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5141 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5142 their VMA address ranges and their LMA address ranges overlap.
5143 It is possible to have overlapping VMA ranges without overlapping LMA
5144 ranges. RedBoot images for example can have both .data and .bss mapped
5145 to the same VMA range, but with the .data section mapped to a different
5147 #define SEGMENT_OVERLAPS(seg1, seg2) \
5148 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5149 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5150 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5151 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5153 /* Initialise the segment mark field. */
5154 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5155 section
->segment_mark
= FALSE
;
5157 /* Scan through the segments specified in the program header
5158 of the input BFD. For this first scan we look for overlaps
5159 in the loadable segments. These can be created by weird
5160 parameters to objcopy. Also, fix some solaris weirdness. */
5161 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5166 Elf_Internal_Phdr
*segment2
;
5168 if (segment
->p_type
== PT_INTERP
)
5169 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5170 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5172 /* Mininal change so that the normal section to segment
5173 assignment code will work. */
5174 segment
->p_vaddr
= section
->vma
;
5178 if (segment
->p_type
!= PT_LOAD
)
5181 /* Determine if this segment overlaps any previous segments. */
5182 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5184 bfd_signed_vma extra_length
;
5186 if (segment2
->p_type
!= PT_LOAD
5187 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5190 /* Merge the two segments together. */
5191 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5193 /* Extend SEGMENT2 to include SEGMENT and then delete
5196 SEGMENT_END (segment
, segment
->p_vaddr
)
5197 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5199 if (extra_length
> 0)
5201 segment2
->p_memsz
+= extra_length
;
5202 segment2
->p_filesz
+= extra_length
;
5205 segment
->p_type
= PT_NULL
;
5207 /* Since we have deleted P we must restart the outer loop. */
5209 segment
= elf_tdata (ibfd
)->phdr
;
5214 /* Extend SEGMENT to include SEGMENT2 and then delete
5217 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5218 - SEGMENT_END (segment
, segment
->p_vaddr
);
5220 if (extra_length
> 0)
5222 segment
->p_memsz
+= extra_length
;
5223 segment
->p_filesz
+= extra_length
;
5226 segment2
->p_type
= PT_NULL
;
5231 /* The second scan attempts to assign sections to segments. */
5232 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5236 unsigned int section_count
;
5237 asection
** sections
;
5238 asection
* output_section
;
5240 bfd_vma matching_lma
;
5241 bfd_vma suggested_lma
;
5245 if (segment
->p_type
== PT_NULL
)
5248 /* Compute how many sections might be placed into this segment. */
5249 for (section
= ibfd
->sections
, section_count
= 0;
5251 section
= section
->next
)
5252 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5255 /* Allocate a segment map big enough to contain
5256 all of the sections we have selected. */
5257 amt
= sizeof (struct elf_segment_map
);
5258 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5259 map
= bfd_alloc (obfd
, amt
);
5263 /* Initialise the fields of the segment map. Default to
5264 using the physical address of the segment in the input BFD. */
5266 map
->p_type
= segment
->p_type
;
5267 map
->p_flags
= segment
->p_flags
;
5268 map
->p_flags_valid
= 1;
5269 map
->p_paddr
= segment
->p_paddr
;
5270 map
->p_paddr_valid
= 1;
5272 /* Determine if this segment contains the ELF file header
5273 and if it contains the program headers themselves. */
5274 map
->includes_filehdr
= (segment
->p_offset
== 0
5275 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5277 map
->includes_phdrs
= 0;
5279 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5281 map
->includes_phdrs
=
5282 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5283 && (segment
->p_offset
+ segment
->p_filesz
5284 >= ((bfd_vma
) iehdr
->e_phoff
5285 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5287 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5288 phdr_included
= TRUE
;
5291 if (section_count
== 0)
5293 /* Special segments, such as the PT_PHDR segment, may contain
5294 no sections, but ordinary, loadable segments should contain
5295 something. They are allowed by the ELF spec however, so only
5296 a warning is produced. */
5297 if (segment
->p_type
== PT_LOAD
)
5298 (*_bfd_error_handler
)
5299 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5303 *pointer_to_map
= map
;
5304 pointer_to_map
= &map
->next
;
5309 /* Now scan the sections in the input BFD again and attempt
5310 to add their corresponding output sections to the segment map.
5311 The problem here is how to handle an output section which has
5312 been moved (ie had its LMA changed). There are four possibilities:
5314 1. None of the sections have been moved.
5315 In this case we can continue to use the segment LMA from the
5318 2. All of the sections have been moved by the same amount.
5319 In this case we can change the segment's LMA to match the LMA
5320 of the first section.
5322 3. Some of the sections have been moved, others have not.
5323 In this case those sections which have not been moved can be
5324 placed in the current segment which will have to have its size,
5325 and possibly its LMA changed, and a new segment or segments will
5326 have to be created to contain the other sections.
5328 4. The sections have been moved, but not by the same amount.
5329 In this case we can change the segment's LMA to match the LMA
5330 of the first section and we will have to create a new segment
5331 or segments to contain the other sections.
5333 In order to save time, we allocate an array to hold the section
5334 pointers that we are interested in. As these sections get assigned
5335 to a segment, they are removed from this array. */
5337 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5338 to work around this long long bug. */
5339 sections
= bfd_malloc2 (section_count
, sizeof (asection
*));
5340 if (sections
== NULL
)
5343 /* Step One: Scan for segment vs section LMA conflicts.
5344 Also add the sections to the section array allocated above.
5345 Also add the sections to the current segment. In the common
5346 case, where the sections have not been moved, this means that
5347 we have completely filled the segment, and there is nothing
5353 for (j
= 0, section
= ibfd
->sections
;
5355 section
= section
->next
)
5357 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5359 output_section
= section
->output_section
;
5361 sections
[j
++] = section
;
5363 /* The Solaris native linker always sets p_paddr to 0.
5364 We try to catch that case here, and set it to the
5365 correct value. Note - some backends require that
5366 p_paddr be left as zero. */
5367 if (segment
->p_paddr
== 0
5368 && segment
->p_vaddr
!= 0
5369 && (! bed
->want_p_paddr_set_to_zero
)
5371 && output_section
->lma
!= 0
5372 && (output_section
->vma
== (segment
->p_vaddr
5373 + (map
->includes_filehdr
5376 + (map
->includes_phdrs
5378 * iehdr
->e_phentsize
)
5380 map
->p_paddr
= segment
->p_vaddr
;
5382 /* Match up the physical address of the segment with the
5383 LMA address of the output section. */
5384 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5385 || IS_COREFILE_NOTE (segment
, section
)
5386 || (bed
->want_p_paddr_set_to_zero
&&
5387 IS_CONTAINED_BY_VMA (output_section
, segment
))
5390 if (matching_lma
== 0)
5391 matching_lma
= output_section
->lma
;
5393 /* We assume that if the section fits within the segment
5394 then it does not overlap any other section within that
5396 map
->sections
[isec
++] = output_section
;
5398 else if (suggested_lma
== 0)
5399 suggested_lma
= output_section
->lma
;
5403 BFD_ASSERT (j
== section_count
);
5405 /* Step Two: Adjust the physical address of the current segment,
5407 if (isec
== section_count
)
5409 /* All of the sections fitted within the segment as currently
5410 specified. This is the default case. Add the segment to
5411 the list of built segments and carry on to process the next
5412 program header in the input BFD. */
5413 map
->count
= section_count
;
5414 *pointer_to_map
= map
;
5415 pointer_to_map
= &map
->next
;
5422 if (matching_lma
!= 0)
5424 /* At least one section fits inside the current segment.
5425 Keep it, but modify its physical address to match the
5426 LMA of the first section that fitted. */
5427 map
->p_paddr
= matching_lma
;
5431 /* None of the sections fitted inside the current segment.
5432 Change the current segment's physical address to match
5433 the LMA of the first section. */
5434 map
->p_paddr
= suggested_lma
;
5437 /* Offset the segment physical address from the lma
5438 to allow for space taken up by elf headers. */
5439 if (map
->includes_filehdr
)
5440 map
->p_paddr
-= iehdr
->e_ehsize
;
5442 if (map
->includes_phdrs
)
5444 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5446 /* iehdr->e_phnum is just an estimate of the number
5447 of program headers that we will need. Make a note
5448 here of the number we used and the segment we chose
5449 to hold these headers, so that we can adjust the
5450 offset when we know the correct value. */
5451 phdr_adjust_num
= iehdr
->e_phnum
;
5452 phdr_adjust_seg
= map
;
5456 /* Step Three: Loop over the sections again, this time assigning
5457 those that fit to the current segment and removing them from the
5458 sections array; but making sure not to leave large gaps. Once all
5459 possible sections have been assigned to the current segment it is
5460 added to the list of built segments and if sections still remain
5461 to be assigned, a new segment is constructed before repeating
5469 /* Fill the current segment with sections that fit. */
5470 for (j
= 0; j
< section_count
; j
++)
5472 section
= sections
[j
];
5474 if (section
== NULL
)
5477 output_section
= section
->output_section
;
5479 BFD_ASSERT (output_section
!= NULL
);
5481 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5482 || IS_COREFILE_NOTE (segment
, section
))
5484 if (map
->count
== 0)
5486 /* If the first section in a segment does not start at
5487 the beginning of the segment, then something is
5489 if (output_section
->lma
!=
5491 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5492 + (map
->includes_phdrs
5493 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5499 asection
* prev_sec
;
5501 prev_sec
= map
->sections
[map
->count
- 1];
5503 /* If the gap between the end of the previous section
5504 and the start of this section is more than
5505 maxpagesize then we need to start a new segment. */
5506 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5508 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5509 || ((prev_sec
->lma
+ prev_sec
->size
)
5510 > output_section
->lma
))
5512 if (suggested_lma
== 0)
5513 suggested_lma
= output_section
->lma
;
5519 map
->sections
[map
->count
++] = output_section
;
5522 section
->segment_mark
= TRUE
;
5524 else if (suggested_lma
== 0)
5525 suggested_lma
= output_section
->lma
;
5528 BFD_ASSERT (map
->count
> 0);
5530 /* Add the current segment to the list of built segments. */
5531 *pointer_to_map
= map
;
5532 pointer_to_map
= &map
->next
;
5534 if (isec
< section_count
)
5536 /* We still have not allocated all of the sections to
5537 segments. Create a new segment here, initialise it
5538 and carry on looping. */
5539 amt
= sizeof (struct elf_segment_map
);
5540 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5541 map
= bfd_alloc (obfd
, amt
);
5548 /* Initialise the fields of the segment map. Set the physical
5549 physical address to the LMA of the first section that has
5550 not yet been assigned. */
5552 map
->p_type
= segment
->p_type
;
5553 map
->p_flags
= segment
->p_flags
;
5554 map
->p_flags_valid
= 1;
5555 map
->p_paddr
= suggested_lma
;
5556 map
->p_paddr_valid
= 1;
5557 map
->includes_filehdr
= 0;
5558 map
->includes_phdrs
= 0;
5561 while (isec
< section_count
);
5566 /* The Solaris linker creates program headers in which all the
5567 p_paddr fields are zero. When we try to objcopy or strip such a
5568 file, we get confused. Check for this case, and if we find it
5569 reset the p_paddr_valid fields. */
5570 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5571 if (map
->p_paddr
!= 0)
5574 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5575 map
->p_paddr_valid
= 0;
5577 elf_tdata (obfd
)->segment_map
= map_first
;
5579 /* If we had to estimate the number of program headers that were
5580 going to be needed, then check our estimate now and adjust
5581 the offset if necessary. */
5582 if (phdr_adjust_seg
!= NULL
)
5586 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5589 if (count
> phdr_adjust_num
)
5590 phdr_adjust_seg
->p_paddr
5591 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5596 #undef IS_CONTAINED_BY_VMA
5597 #undef IS_CONTAINED_BY_LMA
5598 #undef IS_COREFILE_NOTE
5599 #undef IS_SOLARIS_PT_INTERP
5600 #undef INCLUDE_SECTION_IN_SEGMENT
5601 #undef SEGMENT_AFTER_SEGMENT
5602 #undef SEGMENT_OVERLAPS
5606 /* Initialize private output section information from input section. */
5609 _bfd_elf_init_private_section_data (bfd
*ibfd
,
5613 struct bfd_link_info
*link_info
)
5616 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5617 bfd_boolean need_group
= link_info
== NULL
|| link_info
->relocatable
;
5619 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5620 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5623 /* FIXME: What if the output ELF section type has been set to
5624 something different? */
5625 if (elf_section_type (osec
) == SHT_NULL
)
5626 elf_section_type (osec
) = elf_section_type (isec
);
5628 /* Set things up for objcopy and relocatable link. The output
5629 SHT_GROUP section will have its elf_next_in_group pointing back
5630 to the input group members. Ignore linker created group section.
5631 See elfNN_ia64_object_p in elfxx-ia64.c. */
5635 if (elf_sec_group (isec
) == NULL
5636 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5638 if (elf_section_flags (isec
) & SHF_GROUP
)
5639 elf_section_flags (osec
) |= SHF_GROUP
;
5640 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5641 elf_group_name (osec
) = elf_group_name (isec
);
5645 ihdr
= &elf_section_data (isec
)->this_hdr
;
5647 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5648 don't use the output section of the linked-to section since it
5649 may be NULL at this point. */
5650 if ((ihdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
5652 ohdr
= &elf_section_data (osec
)->this_hdr
;
5653 ohdr
->sh_flags
|= SHF_LINK_ORDER
;
5654 elf_linked_to_section (osec
) = elf_linked_to_section (isec
);
5657 osec
->use_rela_p
= isec
->use_rela_p
;
5662 /* Copy private section information. This copies over the entsize
5663 field, and sometimes the info field. */
5666 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5671 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5673 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5674 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5677 ihdr
= &elf_section_data (isec
)->this_hdr
;
5678 ohdr
= &elf_section_data (osec
)->this_hdr
;
5680 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5682 if (ihdr
->sh_type
== SHT_SYMTAB
5683 || ihdr
->sh_type
== SHT_DYNSYM
5684 || ihdr
->sh_type
== SHT_GNU_verneed
5685 || ihdr
->sh_type
== SHT_GNU_verdef
)
5686 ohdr
->sh_info
= ihdr
->sh_info
;
5688 return _bfd_elf_init_private_section_data (ibfd
, isec
, obfd
, osec
,
5692 /* Copy private header information. */
5695 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5697 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5698 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5701 /* Copy over private BFD data if it has not already been copied.
5702 This must be done here, rather than in the copy_private_bfd_data
5703 entry point, because the latter is called after the section
5704 contents have been set, which means that the program headers have
5705 already been worked out. */
5706 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5708 if (! copy_private_bfd_data (ibfd
, obfd
))
5715 /* Copy private symbol information. If this symbol is in a section
5716 which we did not map into a BFD section, try to map the section
5717 index correctly. We use special macro definitions for the mapped
5718 section indices; these definitions are interpreted by the
5719 swap_out_syms function. */
5721 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5722 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5723 #define MAP_STRTAB (SHN_HIOS + 3)
5724 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5725 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5728 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5733 elf_symbol_type
*isym
, *osym
;
5735 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5736 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5739 isym
= elf_symbol_from (ibfd
, isymarg
);
5740 osym
= elf_symbol_from (obfd
, osymarg
);
5744 && bfd_is_abs_section (isym
->symbol
.section
))
5748 shndx
= isym
->internal_elf_sym
.st_shndx
;
5749 if (shndx
== elf_onesymtab (ibfd
))
5750 shndx
= MAP_ONESYMTAB
;
5751 else if (shndx
== elf_dynsymtab (ibfd
))
5752 shndx
= MAP_DYNSYMTAB
;
5753 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5755 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5756 shndx
= MAP_SHSTRTAB
;
5757 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5758 shndx
= MAP_SYM_SHNDX
;
5759 osym
->internal_elf_sym
.st_shndx
= shndx
;
5765 /* Swap out the symbols. */
5768 swap_out_syms (bfd
*abfd
,
5769 struct bfd_strtab_hash
**sttp
,
5772 const struct elf_backend_data
*bed
;
5775 struct bfd_strtab_hash
*stt
;
5776 Elf_Internal_Shdr
*symtab_hdr
;
5777 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5778 Elf_Internal_Shdr
*symstrtab_hdr
;
5779 bfd_byte
*outbound_syms
;
5780 bfd_byte
*outbound_shndx
;
5783 bfd_boolean name_local_sections
;
5785 if (!elf_map_symbols (abfd
))
5788 /* Dump out the symtabs. */
5789 stt
= _bfd_elf_stringtab_init ();
5793 bed
= get_elf_backend_data (abfd
);
5794 symcount
= bfd_get_symcount (abfd
);
5795 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5796 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5797 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5798 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5799 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5800 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5802 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5803 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5805 outbound_syms
= bfd_alloc2 (abfd
, 1 + symcount
, bed
->s
->sizeof_sym
);
5806 if (outbound_syms
== NULL
)
5808 _bfd_stringtab_free (stt
);
5811 symtab_hdr
->contents
= outbound_syms
;
5813 outbound_shndx
= NULL
;
5814 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5815 if (symtab_shndx_hdr
->sh_name
!= 0)
5817 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5818 outbound_shndx
= bfd_zalloc2 (abfd
, 1 + symcount
,
5819 sizeof (Elf_External_Sym_Shndx
));
5820 if (outbound_shndx
== NULL
)
5822 _bfd_stringtab_free (stt
);
5826 symtab_shndx_hdr
->contents
= outbound_shndx
;
5827 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5828 symtab_shndx_hdr
->sh_size
= amt
;
5829 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5830 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5833 /* Now generate the data (for "contents"). */
5835 /* Fill in zeroth symbol and swap it out. */
5836 Elf_Internal_Sym sym
;
5842 sym
.st_shndx
= SHN_UNDEF
;
5843 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5844 outbound_syms
+= bed
->s
->sizeof_sym
;
5845 if (outbound_shndx
!= NULL
)
5846 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5850 = (bed
->elf_backend_name_local_section_symbols
5851 && bed
->elf_backend_name_local_section_symbols (abfd
));
5853 syms
= bfd_get_outsymbols (abfd
);
5854 for (idx
= 0; idx
< symcount
; idx
++)
5856 Elf_Internal_Sym sym
;
5857 bfd_vma value
= syms
[idx
]->value
;
5858 elf_symbol_type
*type_ptr
;
5859 flagword flags
= syms
[idx
]->flags
;
5862 if (!name_local_sections
5863 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5865 /* Local section symbols have no name. */
5870 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5873 if (sym
.st_name
== (unsigned long) -1)
5875 _bfd_stringtab_free (stt
);
5880 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5882 if ((flags
& BSF_SECTION_SYM
) == 0
5883 && bfd_is_com_section (syms
[idx
]->section
))
5885 /* ELF common symbols put the alignment into the `value' field,
5886 and the size into the `size' field. This is backwards from
5887 how BFD handles it, so reverse it here. */
5888 sym
.st_size
= value
;
5889 if (type_ptr
== NULL
5890 || type_ptr
->internal_elf_sym
.st_value
== 0)
5891 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5893 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5894 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5895 (abfd
, syms
[idx
]->section
);
5899 asection
*sec
= syms
[idx
]->section
;
5902 if (sec
->output_section
)
5904 value
+= sec
->output_offset
;
5905 sec
= sec
->output_section
;
5908 /* Don't add in the section vma for relocatable output. */
5909 if (! relocatable_p
)
5911 sym
.st_value
= value
;
5912 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5914 if (bfd_is_abs_section (sec
)
5916 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5918 /* This symbol is in a real ELF section which we did
5919 not create as a BFD section. Undo the mapping done
5920 by copy_private_symbol_data. */
5921 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5925 shndx
= elf_onesymtab (abfd
);
5928 shndx
= elf_dynsymtab (abfd
);
5931 shndx
= elf_tdata (abfd
)->strtab_section
;
5934 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5937 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5945 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5951 /* Writing this would be a hell of a lot easier if
5952 we had some decent documentation on bfd, and
5953 knew what to expect of the library, and what to
5954 demand of applications. For example, it
5955 appears that `objcopy' might not set the
5956 section of a symbol to be a section that is
5957 actually in the output file. */
5958 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5961 _bfd_error_handler (_("\
5962 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5963 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5965 bfd_set_error (bfd_error_invalid_operation
);
5966 _bfd_stringtab_free (stt
);
5970 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5971 BFD_ASSERT (shndx
!= -1);
5975 sym
.st_shndx
= shndx
;
5978 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5980 else if ((flags
& BSF_FUNCTION
) != 0)
5982 else if ((flags
& BSF_OBJECT
) != 0)
5987 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5990 /* Processor-specific types. */
5991 if (type_ptr
!= NULL
5992 && bed
->elf_backend_get_symbol_type
)
5993 type
= ((*bed
->elf_backend_get_symbol_type
)
5994 (&type_ptr
->internal_elf_sym
, type
));
5996 if (flags
& BSF_SECTION_SYM
)
5998 if (flags
& BSF_GLOBAL
)
5999 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
6001 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
6003 else if (bfd_is_com_section (syms
[idx
]->section
))
6004 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6005 else if (bfd_is_und_section (syms
[idx
]->section
))
6006 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6010 else if (flags
& BSF_FILE
)
6011 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6014 int bind
= STB_LOCAL
;
6016 if (flags
& BSF_LOCAL
)
6018 else if (flags
& BSF_WEAK
)
6020 else if (flags
& BSF_GLOBAL
)
6023 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6026 if (type_ptr
!= NULL
)
6027 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6031 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6032 outbound_syms
+= bed
->s
->sizeof_sym
;
6033 if (outbound_shndx
!= NULL
)
6034 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6038 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6039 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6041 symstrtab_hdr
->sh_flags
= 0;
6042 symstrtab_hdr
->sh_addr
= 0;
6043 symstrtab_hdr
->sh_entsize
= 0;
6044 symstrtab_hdr
->sh_link
= 0;
6045 symstrtab_hdr
->sh_info
= 0;
6046 symstrtab_hdr
->sh_addralign
= 1;
6051 /* Return the number of bytes required to hold the symtab vector.
6053 Note that we base it on the count plus 1, since we will null terminate
6054 the vector allocated based on this size. However, the ELF symbol table
6055 always has a dummy entry as symbol #0, so it ends up even. */
6058 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6062 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6064 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6065 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6067 symtab_size
-= sizeof (asymbol
*);
6073 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6077 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6079 if (elf_dynsymtab (abfd
) == 0)
6081 bfd_set_error (bfd_error_invalid_operation
);
6085 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6086 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6088 symtab_size
-= sizeof (asymbol
*);
6094 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6097 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6100 /* Canonicalize the relocs. */
6103 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6110 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6112 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6115 tblptr
= section
->relocation
;
6116 for (i
= 0; i
< section
->reloc_count
; i
++)
6117 *relptr
++ = tblptr
++;
6121 return section
->reloc_count
;
6125 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6127 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6128 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6131 bfd_get_symcount (abfd
) = symcount
;
6136 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6137 asymbol
**allocation
)
6139 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6140 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6143 bfd_get_dynamic_symcount (abfd
) = symcount
;
6147 /* Return the size required for the dynamic reloc entries. Any loadable
6148 section that was actually installed in the BFD, and has type SHT_REL
6149 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6150 dynamic reloc section. */
6153 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6158 if (elf_dynsymtab (abfd
) == 0)
6160 bfd_set_error (bfd_error_invalid_operation
);
6164 ret
= sizeof (arelent
*);
6165 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6166 if ((s
->flags
& SEC_LOAD
) != 0
6167 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6168 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6169 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6170 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6171 * sizeof (arelent
*));
6176 /* Canonicalize the dynamic relocation entries. Note that we return the
6177 dynamic relocations as a single block, although they are actually
6178 associated with particular sections; the interface, which was
6179 designed for SunOS style shared libraries, expects that there is only
6180 one set of dynamic relocs. Any loadable section that was actually
6181 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6182 dynamic symbol table, is considered to be a dynamic reloc section. */
6185 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6189 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6193 if (elf_dynsymtab (abfd
) == 0)
6195 bfd_set_error (bfd_error_invalid_operation
);
6199 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6201 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6203 if ((s
->flags
& SEC_LOAD
) != 0
6204 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6205 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6206 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6211 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6213 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6215 for (i
= 0; i
< count
; i
++)
6226 /* Read in the version information. */
6229 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6231 bfd_byte
*contents
= NULL
;
6232 unsigned int freeidx
= 0;
6234 if (elf_dynverref (abfd
) != 0)
6236 Elf_Internal_Shdr
*hdr
;
6237 Elf_External_Verneed
*everneed
;
6238 Elf_Internal_Verneed
*iverneed
;
6240 bfd_byte
*contents_end
;
6242 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6244 elf_tdata (abfd
)->verref
= bfd_zalloc2 (abfd
, hdr
->sh_info
,
6245 sizeof (Elf_Internal_Verneed
));
6246 if (elf_tdata (abfd
)->verref
== NULL
)
6249 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6251 contents
= bfd_malloc (hdr
->sh_size
);
6252 if (contents
== NULL
)
6254 error_return_verref
:
6255 elf_tdata (abfd
)->verref
= NULL
;
6256 elf_tdata (abfd
)->cverrefs
= 0;
6259 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6260 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6261 goto error_return_verref
;
6263 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verneed
))
6264 goto error_return_verref
;
6266 BFD_ASSERT (sizeof (Elf_External_Verneed
)
6267 == sizeof (Elf_External_Vernaux
));
6268 contents_end
= contents
+ hdr
->sh_size
- sizeof (Elf_External_Verneed
);
6269 everneed
= (Elf_External_Verneed
*) contents
;
6270 iverneed
= elf_tdata (abfd
)->verref
;
6271 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6273 Elf_External_Vernaux
*evernaux
;
6274 Elf_Internal_Vernaux
*ivernaux
;
6277 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6279 iverneed
->vn_bfd
= abfd
;
6281 iverneed
->vn_filename
=
6282 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6284 if (iverneed
->vn_filename
== NULL
)
6285 goto error_return_verref
;
6287 if (iverneed
->vn_cnt
== 0)
6288 iverneed
->vn_auxptr
= NULL
;
6291 iverneed
->vn_auxptr
= bfd_alloc2 (abfd
, iverneed
->vn_cnt
,
6292 sizeof (Elf_Internal_Vernaux
));
6293 if (iverneed
->vn_auxptr
== NULL
)
6294 goto error_return_verref
;
6297 if (iverneed
->vn_aux
6298 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6299 goto error_return_verref
;
6301 evernaux
= ((Elf_External_Vernaux
*)
6302 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6303 ivernaux
= iverneed
->vn_auxptr
;
6304 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6306 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6308 ivernaux
->vna_nodename
=
6309 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6310 ivernaux
->vna_name
);
6311 if (ivernaux
->vna_nodename
== NULL
)
6312 goto error_return_verref
;
6314 if (j
+ 1 < iverneed
->vn_cnt
)
6315 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6317 ivernaux
->vna_nextptr
= NULL
;
6319 if (ivernaux
->vna_next
6320 > (size_t) (contents_end
- (bfd_byte
*) evernaux
))
6321 goto error_return_verref
;
6323 evernaux
= ((Elf_External_Vernaux
*)
6324 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6326 if (ivernaux
->vna_other
> freeidx
)
6327 freeidx
= ivernaux
->vna_other
;
6330 if (i
+ 1 < hdr
->sh_info
)
6331 iverneed
->vn_nextref
= iverneed
+ 1;
6333 iverneed
->vn_nextref
= NULL
;
6335 if (iverneed
->vn_next
6336 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6337 goto error_return_verref
;
6339 everneed
= ((Elf_External_Verneed
*)
6340 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6347 if (elf_dynverdef (abfd
) != 0)
6349 Elf_Internal_Shdr
*hdr
;
6350 Elf_External_Verdef
*everdef
;
6351 Elf_Internal_Verdef
*iverdef
;
6352 Elf_Internal_Verdef
*iverdefarr
;
6353 Elf_Internal_Verdef iverdefmem
;
6355 unsigned int maxidx
;
6356 bfd_byte
*contents_end_def
, *contents_end_aux
;
6358 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6360 contents
= bfd_malloc (hdr
->sh_size
);
6361 if (contents
== NULL
)
6363 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6364 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6367 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verdef
))
6370 BFD_ASSERT (sizeof (Elf_External_Verdef
)
6371 >= sizeof (Elf_External_Verdaux
));
6372 contents_end_def
= contents
+ hdr
->sh_size
6373 - sizeof (Elf_External_Verdef
);
6374 contents_end_aux
= contents
+ hdr
->sh_size
6375 - sizeof (Elf_External_Verdaux
);
6377 /* We know the number of entries in the section but not the maximum
6378 index. Therefore we have to run through all entries and find
6380 everdef
= (Elf_External_Verdef
*) contents
;
6382 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6384 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6386 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6387 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6389 if (iverdefmem
.vd_next
6390 > (size_t) (contents_end_def
- (bfd_byte
*) everdef
))
6393 everdef
= ((Elf_External_Verdef
*)
6394 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6397 if (default_imported_symver
)
6399 if (freeidx
> maxidx
)
6404 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, maxidx
,
6405 sizeof (Elf_Internal_Verdef
));
6406 if (elf_tdata (abfd
)->verdef
== NULL
)
6409 elf_tdata (abfd
)->cverdefs
= maxidx
;
6411 everdef
= (Elf_External_Verdef
*) contents
;
6412 iverdefarr
= elf_tdata (abfd
)->verdef
;
6413 for (i
= 0; i
< hdr
->sh_info
; i
++)
6415 Elf_External_Verdaux
*everdaux
;
6416 Elf_Internal_Verdaux
*iverdaux
;
6419 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6421 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) == 0)
6423 error_return_verdef
:
6424 elf_tdata (abfd
)->verdef
= NULL
;
6425 elf_tdata (abfd
)->cverdefs
= 0;
6429 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6430 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6432 iverdef
->vd_bfd
= abfd
;
6434 if (iverdef
->vd_cnt
== 0)
6435 iverdef
->vd_auxptr
= NULL
;
6438 iverdef
->vd_auxptr
= bfd_alloc2 (abfd
, iverdef
->vd_cnt
,
6439 sizeof (Elf_Internal_Verdaux
));
6440 if (iverdef
->vd_auxptr
== NULL
)
6441 goto error_return_verdef
;
6445 > (size_t) (contents_end_aux
- (bfd_byte
*) everdef
))
6446 goto error_return_verdef
;
6448 everdaux
= ((Elf_External_Verdaux
*)
6449 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6450 iverdaux
= iverdef
->vd_auxptr
;
6451 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6453 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6455 iverdaux
->vda_nodename
=
6456 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6457 iverdaux
->vda_name
);
6458 if (iverdaux
->vda_nodename
== NULL
)
6459 goto error_return_verdef
;
6461 if (j
+ 1 < iverdef
->vd_cnt
)
6462 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6464 iverdaux
->vda_nextptr
= NULL
;
6466 if (iverdaux
->vda_next
6467 > (size_t) (contents_end_aux
- (bfd_byte
*) everdaux
))
6468 goto error_return_verdef
;
6470 everdaux
= ((Elf_External_Verdaux
*)
6471 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6474 if (iverdef
->vd_cnt
)
6475 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6477 if ((size_t) (iverdef
- iverdefarr
) + 1 < maxidx
)
6478 iverdef
->vd_nextdef
= iverdef
+ 1;
6480 iverdef
->vd_nextdef
= NULL
;
6482 everdef
= ((Elf_External_Verdef
*)
6483 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6489 else if (default_imported_symver
)
6496 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, freeidx
,
6497 sizeof (Elf_Internal_Verdef
));
6498 if (elf_tdata (abfd
)->verdef
== NULL
)
6501 elf_tdata (abfd
)->cverdefs
= freeidx
;
6504 /* Create a default version based on the soname. */
6505 if (default_imported_symver
)
6507 Elf_Internal_Verdef
*iverdef
;
6508 Elf_Internal_Verdaux
*iverdaux
;
6510 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6512 iverdef
->vd_version
= VER_DEF_CURRENT
;
6513 iverdef
->vd_flags
= 0;
6514 iverdef
->vd_ndx
= freeidx
;
6515 iverdef
->vd_cnt
= 1;
6517 iverdef
->vd_bfd
= abfd
;
6519 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6520 if (iverdef
->vd_nodename
== NULL
)
6521 goto error_return_verdef
;
6522 iverdef
->vd_nextdef
= NULL
;
6523 iverdef
->vd_auxptr
= bfd_alloc (abfd
, sizeof (Elf_Internal_Verdaux
));
6524 if (iverdef
->vd_auxptr
== NULL
)
6525 goto error_return_verdef
;
6527 iverdaux
= iverdef
->vd_auxptr
;
6528 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6529 iverdaux
->vda_nextptr
= NULL
;
6535 if (contents
!= NULL
)
6541 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6543 elf_symbol_type
*newsym
;
6544 bfd_size_type amt
= sizeof (elf_symbol_type
);
6546 newsym
= bfd_zalloc (abfd
, amt
);
6551 newsym
->symbol
.the_bfd
= abfd
;
6552 return &newsym
->symbol
;
6557 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6561 bfd_symbol_info (symbol
, ret
);
6564 /* Return whether a symbol name implies a local symbol. Most targets
6565 use this function for the is_local_label_name entry point, but some
6569 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6572 /* Normal local symbols start with ``.L''. */
6573 if (name
[0] == '.' && name
[1] == 'L')
6576 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6577 DWARF debugging symbols starting with ``..''. */
6578 if (name
[0] == '.' && name
[1] == '.')
6581 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6582 emitting DWARF debugging output. I suspect this is actually a
6583 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6584 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6585 underscore to be emitted on some ELF targets). For ease of use,
6586 we treat such symbols as local. */
6587 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6594 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6595 asymbol
*symbol ATTRIBUTE_UNUSED
)
6602 _bfd_elf_set_arch_mach (bfd
*abfd
,
6603 enum bfd_architecture arch
,
6604 unsigned long machine
)
6606 /* If this isn't the right architecture for this backend, and this
6607 isn't the generic backend, fail. */
6608 if (arch
!= get_elf_backend_data (abfd
)->arch
6609 && arch
!= bfd_arch_unknown
6610 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6613 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6616 /* Find the function to a particular section and offset,
6617 for error reporting. */
6620 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6624 const char **filename_ptr
,
6625 const char **functionname_ptr
)
6627 const char *filename
;
6628 asymbol
*func
, *file
;
6631 /* ??? Given multiple file symbols, it is impossible to reliably
6632 choose the right file name for global symbols. File symbols are
6633 local symbols, and thus all file symbols must sort before any
6634 global symbols. The ELF spec may be interpreted to say that a
6635 file symbol must sort before other local symbols, but currently
6636 ld -r doesn't do this. So, for ld -r output, it is possible to
6637 make a better choice of file name for local symbols by ignoring
6638 file symbols appearing after a given local symbol. */
6639 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6645 state
= nothing_seen
;
6647 for (p
= symbols
; *p
!= NULL
; p
++)
6651 q
= (elf_symbol_type
*) *p
;
6653 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6659 if (state
== symbol_seen
)
6660 state
= file_after_symbol_seen
;
6666 if (bfd_get_section (&q
->symbol
) == section
6667 && q
->symbol
.value
>= low_func
6668 && q
->symbol
.value
<= offset
)
6670 func
= (asymbol
*) q
;
6671 low_func
= q
->symbol
.value
;
6674 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6675 && state
== file_after_symbol_seen
)
6678 filename
= bfd_asymbol_name (file
);
6682 if (state
== nothing_seen
)
6683 state
= symbol_seen
;
6690 *filename_ptr
= filename
;
6691 if (functionname_ptr
)
6692 *functionname_ptr
= bfd_asymbol_name (func
);
6697 /* Find the nearest line to a particular section and offset,
6698 for error reporting. */
6701 _bfd_elf_find_nearest_line (bfd
*abfd
,
6705 const char **filename_ptr
,
6706 const char **functionname_ptr
,
6707 unsigned int *line_ptr
)
6711 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6712 filename_ptr
, functionname_ptr
,
6715 if (!*functionname_ptr
)
6716 elf_find_function (abfd
, section
, symbols
, offset
,
6717 *filename_ptr
? NULL
: filename_ptr
,
6723 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6724 filename_ptr
, functionname_ptr
,
6726 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6728 if (!*functionname_ptr
)
6729 elf_find_function (abfd
, section
, symbols
, offset
,
6730 *filename_ptr
? NULL
: filename_ptr
,
6736 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6737 &found
, filename_ptr
,
6738 functionname_ptr
, line_ptr
,
6739 &elf_tdata (abfd
)->line_info
))
6741 if (found
&& (*functionname_ptr
|| *line_ptr
))
6744 if (symbols
== NULL
)
6747 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6748 filename_ptr
, functionname_ptr
))
6755 /* Find the line for a symbol. */
6758 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6759 const char **filename_ptr
, unsigned int *line_ptr
)
6761 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6762 filename_ptr
, line_ptr
, 0,
6763 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6766 /* After a call to bfd_find_nearest_line, successive calls to
6767 bfd_find_inliner_info can be used to get source information about
6768 each level of function inlining that terminated at the address
6769 passed to bfd_find_nearest_line. Currently this is only supported
6770 for DWARF2 with appropriate DWARF3 extensions. */
6773 _bfd_elf_find_inliner_info (bfd
*abfd
,
6774 const char **filename_ptr
,
6775 const char **functionname_ptr
,
6776 unsigned int *line_ptr
)
6779 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6780 functionname_ptr
, line_ptr
,
6781 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6786 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6790 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6792 ret
+= get_program_header_size (abfd
);
6797 _bfd_elf_set_section_contents (bfd
*abfd
,
6799 const void *location
,
6801 bfd_size_type count
)
6803 Elf_Internal_Shdr
*hdr
;
6806 if (! abfd
->output_has_begun
6807 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6810 hdr
= &elf_section_data (section
)->this_hdr
;
6811 pos
= hdr
->sh_offset
+ offset
;
6812 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6813 || bfd_bwrite (location
, count
, abfd
) != count
)
6820 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6821 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6822 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6827 /* Try to convert a non-ELF reloc into an ELF one. */
6830 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6832 /* Check whether we really have an ELF howto. */
6834 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6836 bfd_reloc_code_real_type code
;
6837 reloc_howto_type
*howto
;
6839 /* Alien reloc: Try to determine its type to replace it with an
6840 equivalent ELF reloc. */
6842 if (areloc
->howto
->pc_relative
)
6844 switch (areloc
->howto
->bitsize
)
6847 code
= BFD_RELOC_8_PCREL
;
6850 code
= BFD_RELOC_12_PCREL
;
6853 code
= BFD_RELOC_16_PCREL
;
6856 code
= BFD_RELOC_24_PCREL
;
6859 code
= BFD_RELOC_32_PCREL
;
6862 code
= BFD_RELOC_64_PCREL
;
6868 howto
= bfd_reloc_type_lookup (abfd
, code
);
6870 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6872 if (howto
->pcrel_offset
)
6873 areloc
->addend
+= areloc
->address
;
6875 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6880 switch (areloc
->howto
->bitsize
)
6886 code
= BFD_RELOC_14
;
6889 code
= BFD_RELOC_16
;
6892 code
= BFD_RELOC_26
;
6895 code
= BFD_RELOC_32
;
6898 code
= BFD_RELOC_64
;
6904 howto
= bfd_reloc_type_lookup (abfd
, code
);
6908 areloc
->howto
= howto
;
6916 (*_bfd_error_handler
)
6917 (_("%B: unsupported relocation type %s"),
6918 abfd
, areloc
->howto
->name
);
6919 bfd_set_error (bfd_error_bad_value
);
6924 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6926 if (bfd_get_format (abfd
) == bfd_object
)
6928 if (elf_shstrtab (abfd
) != NULL
)
6929 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6930 _bfd_dwarf2_cleanup_debug_info (abfd
);
6933 return _bfd_generic_close_and_cleanup (abfd
);
6936 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6937 in the relocation's offset. Thus we cannot allow any sort of sanity
6938 range-checking to interfere. There is nothing else to do in processing
6941 bfd_reloc_status_type
6942 _bfd_elf_rel_vtable_reloc_fn
6943 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6944 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6945 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6946 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6948 return bfd_reloc_ok
;
6951 /* Elf core file support. Much of this only works on native
6952 toolchains, since we rely on knowing the
6953 machine-dependent procfs structure in order to pick
6954 out details about the corefile. */
6956 #ifdef HAVE_SYS_PROCFS_H
6957 # include <sys/procfs.h>
6960 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6963 elfcore_make_pid (bfd
*abfd
)
6965 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6966 + (elf_tdata (abfd
)->core_pid
));
6969 /* If there isn't a section called NAME, make one, using
6970 data from SECT. Note, this function will generate a
6971 reference to NAME, so you shouldn't deallocate or
6975 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6979 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6982 sect2
= bfd_make_section (abfd
, name
);
6986 sect2
->size
= sect
->size
;
6987 sect2
->filepos
= sect
->filepos
;
6988 sect2
->flags
= sect
->flags
;
6989 sect2
->alignment_power
= sect
->alignment_power
;
6993 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6994 actually creates up to two pseudosections:
6995 - For the single-threaded case, a section named NAME, unless
6996 such a section already exists.
6997 - For the multi-threaded case, a section named "NAME/PID", where
6998 PID is elfcore_make_pid (abfd).
6999 Both pseudosections have identical contents. */
7001 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
7007 char *threaded_name
;
7011 /* Build the section name. */
7013 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
7014 len
= strlen (buf
) + 1;
7015 threaded_name
= bfd_alloc (abfd
, len
);
7016 if (threaded_name
== NULL
)
7018 memcpy (threaded_name
, buf
, len
);
7020 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
7024 sect
->filepos
= filepos
;
7025 sect
->flags
= SEC_HAS_CONTENTS
;
7026 sect
->alignment_power
= 2;
7028 return elfcore_maybe_make_sect (abfd
, name
, sect
);
7031 /* prstatus_t exists on:
7033 linux 2.[01] + glibc
7037 #if defined (HAVE_PRSTATUS_T)
7040 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7045 if (note
->descsz
== sizeof (prstatus_t
))
7049 size
= sizeof (prstat
.pr_reg
);
7050 offset
= offsetof (prstatus_t
, pr_reg
);
7051 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7053 /* Do not overwrite the core signal if it
7054 has already been set by another thread. */
7055 if (elf_tdata (abfd
)->core_signal
== 0)
7056 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7057 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7059 /* pr_who exists on:
7062 pr_who doesn't exist on:
7065 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7066 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7069 #if defined (HAVE_PRSTATUS32_T)
7070 else if (note
->descsz
== sizeof (prstatus32_t
))
7072 /* 64-bit host, 32-bit corefile */
7073 prstatus32_t prstat
;
7075 size
= sizeof (prstat
.pr_reg
);
7076 offset
= offsetof (prstatus32_t
, pr_reg
);
7077 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7079 /* Do not overwrite the core signal if it
7080 has already been set by another thread. */
7081 if (elf_tdata (abfd
)->core_signal
== 0)
7082 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7083 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7085 /* pr_who exists on:
7088 pr_who doesn't exist on:
7091 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7092 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7095 #endif /* HAVE_PRSTATUS32_T */
7098 /* Fail - we don't know how to handle any other
7099 note size (ie. data object type). */
7103 /* Make a ".reg/999" section and a ".reg" section. */
7104 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7105 size
, note
->descpos
+ offset
);
7107 #endif /* defined (HAVE_PRSTATUS_T) */
7109 /* Create a pseudosection containing the exact contents of NOTE. */
7111 elfcore_make_note_pseudosection (bfd
*abfd
,
7113 Elf_Internal_Note
*note
)
7115 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7116 note
->descsz
, note
->descpos
);
7119 /* There isn't a consistent prfpregset_t across platforms,
7120 but it doesn't matter, because we don't have to pick this
7121 data structure apart. */
7124 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7126 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7129 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7130 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7134 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7136 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7139 #if defined (HAVE_PRPSINFO_T)
7140 typedef prpsinfo_t elfcore_psinfo_t
;
7141 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7142 typedef prpsinfo32_t elfcore_psinfo32_t
;
7146 #if defined (HAVE_PSINFO_T)
7147 typedef psinfo_t elfcore_psinfo_t
;
7148 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7149 typedef psinfo32_t elfcore_psinfo32_t
;
7153 /* return a malloc'ed copy of a string at START which is at
7154 most MAX bytes long, possibly without a terminating '\0'.
7155 the copy will always have a terminating '\0'. */
7158 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7161 char *end
= memchr (start
, '\0', max
);
7169 dups
= bfd_alloc (abfd
, len
+ 1);
7173 memcpy (dups
, start
, len
);
7179 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7181 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7183 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7185 elfcore_psinfo_t psinfo
;
7187 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7189 elf_tdata (abfd
)->core_program
7190 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7191 sizeof (psinfo
.pr_fname
));
7193 elf_tdata (abfd
)->core_command
7194 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7195 sizeof (psinfo
.pr_psargs
));
7197 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7198 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7200 /* 64-bit host, 32-bit corefile */
7201 elfcore_psinfo32_t psinfo
;
7203 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7205 elf_tdata (abfd
)->core_program
7206 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7207 sizeof (psinfo
.pr_fname
));
7209 elf_tdata (abfd
)->core_command
7210 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7211 sizeof (psinfo
.pr_psargs
));
7217 /* Fail - we don't know how to handle any other
7218 note size (ie. data object type). */
7222 /* Note that for some reason, a spurious space is tacked
7223 onto the end of the args in some (at least one anyway)
7224 implementations, so strip it off if it exists. */
7227 char *command
= elf_tdata (abfd
)->core_command
;
7228 int n
= strlen (command
);
7230 if (0 < n
&& command
[n
- 1] == ' ')
7231 command
[n
- 1] = '\0';
7236 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7238 #if defined (HAVE_PSTATUS_T)
7240 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7242 if (note
->descsz
== sizeof (pstatus_t
)
7243 #if defined (HAVE_PXSTATUS_T)
7244 || note
->descsz
== sizeof (pxstatus_t
)
7250 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7252 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7254 #if defined (HAVE_PSTATUS32_T)
7255 else if (note
->descsz
== sizeof (pstatus32_t
))
7257 /* 64-bit host, 32-bit corefile */
7260 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7262 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7265 /* Could grab some more details from the "representative"
7266 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7267 NT_LWPSTATUS note, presumably. */
7271 #endif /* defined (HAVE_PSTATUS_T) */
7273 #if defined (HAVE_LWPSTATUS_T)
7275 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7277 lwpstatus_t lwpstat
;
7283 if (note
->descsz
!= sizeof (lwpstat
)
7284 #if defined (HAVE_LWPXSTATUS_T)
7285 && note
->descsz
!= sizeof (lwpxstatus_t
)
7290 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7292 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7293 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7295 /* Make a ".reg/999" section. */
7297 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7298 len
= strlen (buf
) + 1;
7299 name
= bfd_alloc (abfd
, len
);
7302 memcpy (name
, buf
, len
);
7304 sect
= bfd_make_section_anyway (abfd
, name
);
7308 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7309 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7310 sect
->filepos
= note
->descpos
7311 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7314 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7315 sect
->size
= sizeof (lwpstat
.pr_reg
);
7316 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7319 sect
->flags
= SEC_HAS_CONTENTS
;
7320 sect
->alignment_power
= 2;
7322 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7325 /* Make a ".reg2/999" section */
7327 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7328 len
= strlen (buf
) + 1;
7329 name
= bfd_alloc (abfd
, len
);
7332 memcpy (name
, buf
, len
);
7334 sect
= bfd_make_section_anyway (abfd
, name
);
7338 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7339 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7340 sect
->filepos
= note
->descpos
7341 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7344 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7345 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7346 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7349 sect
->flags
= SEC_HAS_CONTENTS
;
7350 sect
->alignment_power
= 2;
7352 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7354 #endif /* defined (HAVE_LWPSTATUS_T) */
7356 #if defined (HAVE_WIN32_PSTATUS_T)
7358 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7364 win32_pstatus_t pstatus
;
7366 if (note
->descsz
< sizeof (pstatus
))
7369 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7371 switch (pstatus
.data_type
)
7373 case NOTE_INFO_PROCESS
:
7374 /* FIXME: need to add ->core_command. */
7375 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7376 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7379 case NOTE_INFO_THREAD
:
7380 /* Make a ".reg/999" section. */
7381 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7383 len
= strlen (buf
) + 1;
7384 name
= bfd_alloc (abfd
, len
);
7388 memcpy (name
, buf
, len
);
7390 sect
= bfd_make_section_anyway (abfd
, name
);
7394 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7395 sect
->filepos
= (note
->descpos
7396 + offsetof (struct win32_pstatus
,
7397 data
.thread_info
.thread_context
));
7398 sect
->flags
= SEC_HAS_CONTENTS
;
7399 sect
->alignment_power
= 2;
7401 if (pstatus
.data
.thread_info
.is_active_thread
)
7402 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7406 case NOTE_INFO_MODULE
:
7407 /* Make a ".module/xxxxxxxx" section. */
7408 sprintf (buf
, ".module/%08lx",
7409 (long) pstatus
.data
.module_info
.base_address
);
7411 len
= strlen (buf
) + 1;
7412 name
= bfd_alloc (abfd
, len
);
7416 memcpy (name
, buf
, len
);
7418 sect
= bfd_make_section_anyway (abfd
, name
);
7423 sect
->size
= note
->descsz
;
7424 sect
->filepos
= note
->descpos
;
7425 sect
->flags
= SEC_HAS_CONTENTS
;
7426 sect
->alignment_power
= 2;
7435 #endif /* HAVE_WIN32_PSTATUS_T */
7438 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7440 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7448 if (bed
->elf_backend_grok_prstatus
)
7449 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7451 #if defined (HAVE_PRSTATUS_T)
7452 return elfcore_grok_prstatus (abfd
, note
);
7457 #if defined (HAVE_PSTATUS_T)
7459 return elfcore_grok_pstatus (abfd
, note
);
7462 #if defined (HAVE_LWPSTATUS_T)
7464 return elfcore_grok_lwpstatus (abfd
, note
);
7467 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7468 return elfcore_grok_prfpreg (abfd
, note
);
7470 #if defined (HAVE_WIN32_PSTATUS_T)
7471 case NT_WIN32PSTATUS
:
7472 return elfcore_grok_win32pstatus (abfd
, note
);
7475 case NT_PRXFPREG
: /* Linux SSE extension */
7476 if (note
->namesz
== 6
7477 && strcmp (note
->namedata
, "LINUX") == 0)
7478 return elfcore_grok_prxfpreg (abfd
, note
);
7484 if (bed
->elf_backend_grok_psinfo
)
7485 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7487 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7488 return elfcore_grok_psinfo (abfd
, note
);
7495 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7499 sect
->size
= note
->descsz
;
7500 sect
->filepos
= note
->descpos
;
7501 sect
->flags
= SEC_HAS_CONTENTS
;
7502 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7510 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7514 cp
= strchr (note
->namedata
, '@');
7517 *lwpidp
= atoi(cp
+ 1);
7524 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7527 /* Signal number at offset 0x08. */
7528 elf_tdata (abfd
)->core_signal
7529 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7531 /* Process ID at offset 0x50. */
7532 elf_tdata (abfd
)->core_pid
7533 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7535 /* Command name at 0x7c (max 32 bytes, including nul). */
7536 elf_tdata (abfd
)->core_command
7537 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7539 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7544 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7548 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7549 elf_tdata (abfd
)->core_lwpid
= lwp
;
7551 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7553 /* NetBSD-specific core "procinfo". Note that we expect to
7554 find this note before any of the others, which is fine,
7555 since the kernel writes this note out first when it
7556 creates a core file. */
7558 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7561 /* As of Jan 2002 there are no other machine-independent notes
7562 defined for NetBSD core files. If the note type is less
7563 than the start of the machine-dependent note types, we don't
7566 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7570 switch (bfd_get_arch (abfd
))
7572 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7573 PT_GETFPREGS == mach+2. */
7575 case bfd_arch_alpha
:
7576 case bfd_arch_sparc
:
7579 case NT_NETBSDCORE_FIRSTMACH
+0:
7580 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7582 case NT_NETBSDCORE_FIRSTMACH
+2:
7583 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7589 /* On all other arch's, PT_GETREGS == mach+1 and
7590 PT_GETFPREGS == mach+3. */
7595 case NT_NETBSDCORE_FIRSTMACH
+1:
7596 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7598 case NT_NETBSDCORE_FIRSTMACH
+3:
7599 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7609 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7611 void *ddata
= note
->descdata
;
7618 /* nto_procfs_status 'pid' field is at offset 0. */
7619 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7621 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7622 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7624 /* nto_procfs_status 'flags' field is at offset 8. */
7625 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7627 /* nto_procfs_status 'what' field is at offset 14. */
7628 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7630 elf_tdata (abfd
)->core_signal
= sig
;
7631 elf_tdata (abfd
)->core_lwpid
= *tid
;
7634 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7635 do not come from signals so we make sure we set the current
7636 thread just in case. */
7637 if (flags
& 0x00000080)
7638 elf_tdata (abfd
)->core_lwpid
= *tid
;
7640 /* Make a ".qnx_core_status/%d" section. */
7641 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7643 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7648 sect
= bfd_make_section_anyway (abfd
, name
);
7652 sect
->size
= note
->descsz
;
7653 sect
->filepos
= note
->descpos
;
7654 sect
->flags
= SEC_HAS_CONTENTS
;
7655 sect
->alignment_power
= 2;
7657 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7661 elfcore_grok_nto_regs (bfd
*abfd
,
7662 Elf_Internal_Note
*note
,
7670 /* Make a "(base)/%d" section. */
7671 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7673 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7678 sect
= bfd_make_section_anyway (abfd
, name
);
7682 sect
->size
= note
->descsz
;
7683 sect
->filepos
= note
->descpos
;
7684 sect
->flags
= SEC_HAS_CONTENTS
;
7685 sect
->alignment_power
= 2;
7687 /* This is the current thread. */
7688 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7689 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7694 #define BFD_QNT_CORE_INFO 7
7695 #define BFD_QNT_CORE_STATUS 8
7696 #define BFD_QNT_CORE_GREG 9
7697 #define BFD_QNT_CORE_FPREG 10
7700 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7702 /* Every GREG section has a STATUS section before it. Store the
7703 tid from the previous call to pass down to the next gregs
7705 static pid_t tid
= 1;
7709 case BFD_QNT_CORE_INFO
:
7710 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7711 case BFD_QNT_CORE_STATUS
:
7712 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7713 case BFD_QNT_CORE_GREG
:
7714 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7715 case BFD_QNT_CORE_FPREG
:
7716 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7722 /* Function: elfcore_write_note
7729 size of data for note
7732 End of buffer containing note. */
7735 elfcore_write_note (bfd
*abfd
,
7743 Elf_External_Note
*xnp
;
7753 const struct elf_backend_data
*bed
;
7755 namesz
= strlen (name
) + 1;
7756 bed
= get_elf_backend_data (abfd
);
7757 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7760 newspace
= 12 + namesz
+ pad
+ size
;
7762 p
= realloc (buf
, *bufsiz
+ newspace
);
7764 *bufsiz
+= newspace
;
7765 xnp
= (Elf_External_Note
*) dest
;
7766 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7767 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7768 H_PUT_32 (abfd
, type
, xnp
->type
);
7772 memcpy (dest
, name
, namesz
);
7780 memcpy (dest
, input
, size
);
7784 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7786 elfcore_write_prpsinfo (bfd
*abfd
,
7793 char *note_name
= "CORE";
7795 #if defined (HAVE_PSINFO_T)
7797 note_type
= NT_PSINFO
;
7800 note_type
= NT_PRPSINFO
;
7803 memset (&data
, 0, sizeof (data
));
7804 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7805 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7806 return elfcore_write_note (abfd
, buf
, bufsiz
,
7807 note_name
, note_type
, &data
, sizeof (data
));
7809 #endif /* PSINFO_T or PRPSINFO_T */
7811 #if defined (HAVE_PRSTATUS_T)
7813 elfcore_write_prstatus (bfd
*abfd
,
7821 char *note_name
= "CORE";
7823 memset (&prstat
, 0, sizeof (prstat
));
7824 prstat
.pr_pid
= pid
;
7825 prstat
.pr_cursig
= cursig
;
7826 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7827 return elfcore_write_note (abfd
, buf
, bufsiz
,
7828 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7830 #endif /* HAVE_PRSTATUS_T */
7832 #if defined (HAVE_LWPSTATUS_T)
7834 elfcore_write_lwpstatus (bfd
*abfd
,
7841 lwpstatus_t lwpstat
;
7842 char *note_name
= "CORE";
7844 memset (&lwpstat
, 0, sizeof (lwpstat
));
7845 lwpstat
.pr_lwpid
= pid
>> 16;
7846 lwpstat
.pr_cursig
= cursig
;
7847 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7848 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7849 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7851 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7852 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7854 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7855 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7858 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7859 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7861 #endif /* HAVE_LWPSTATUS_T */
7863 #if defined (HAVE_PSTATUS_T)
7865 elfcore_write_pstatus (bfd
*abfd
,
7873 char *note_name
= "CORE";
7875 memset (&pstat
, 0, sizeof (pstat
));
7876 pstat
.pr_pid
= pid
& 0xffff;
7877 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7878 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7881 #endif /* HAVE_PSTATUS_T */
7884 elfcore_write_prfpreg (bfd
*abfd
,
7890 char *note_name
= "CORE";
7891 return elfcore_write_note (abfd
, buf
, bufsiz
,
7892 note_name
, NT_FPREGSET
, fpregs
, size
);
7896 elfcore_write_prxfpreg (bfd
*abfd
,
7899 const void *xfpregs
,
7902 char *note_name
= "LINUX";
7903 return elfcore_write_note (abfd
, buf
, bufsiz
,
7904 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7908 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7916 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7919 buf
= bfd_malloc (size
);
7923 if (bfd_bread (buf
, size
, abfd
) != size
)
7931 while (p
< buf
+ size
)
7933 /* FIXME: bad alignment assumption. */
7934 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7935 Elf_Internal_Note in
;
7937 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7939 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7940 in
.namedata
= xnp
->name
;
7942 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7943 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7944 in
.descpos
= offset
+ (in
.descdata
- buf
);
7946 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7948 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7951 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7953 if (! elfcore_grok_nto_note (abfd
, &in
))
7958 if (! elfcore_grok_note (abfd
, &in
))
7962 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7969 /* Providing external access to the ELF program header table. */
7971 /* Return an upper bound on the number of bytes required to store a
7972 copy of ABFD's program header table entries. Return -1 if an error
7973 occurs; bfd_get_error will return an appropriate code. */
7976 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7978 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7980 bfd_set_error (bfd_error_wrong_format
);
7984 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7987 /* Copy ABFD's program header table entries to *PHDRS. The entries
7988 will be stored as an array of Elf_Internal_Phdr structures, as
7989 defined in include/elf/internal.h. To find out how large the
7990 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7992 Return the number of program header table entries read, or -1 if an
7993 error occurs; bfd_get_error will return an appropriate code. */
7996 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
8000 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8002 bfd_set_error (bfd_error_wrong_format
);
8006 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
8007 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
8008 num_phdrs
* sizeof (Elf_Internal_Phdr
));
8014 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
8017 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8019 i_ehdrp
= elf_elfheader (abfd
);
8020 if (i_ehdrp
== NULL
)
8021 sprintf_vma (buf
, value
);
8024 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8026 #if BFD_HOST_64BIT_LONG
8027 sprintf (buf
, "%016lx", value
);
8029 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
8030 _bfd_int64_low (value
));
8034 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
8037 sprintf_vma (buf
, value
);
8042 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
8045 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8047 i_ehdrp
= elf_elfheader (abfd
);
8048 if (i_ehdrp
== NULL
)
8049 fprintf_vma ((FILE *) stream
, value
);
8052 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8054 #if BFD_HOST_64BIT_LONG
8055 fprintf ((FILE *) stream
, "%016lx", value
);
8057 fprintf ((FILE *) stream
, "%08lx%08lx",
8058 _bfd_int64_high (value
), _bfd_int64_low (value
));
8062 fprintf ((FILE *) stream
, "%08lx",
8063 (unsigned long) (value
& 0xffffffff));
8066 fprintf_vma ((FILE *) stream
, value
);
8070 enum elf_reloc_type_class
8071 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8073 return reloc_class_normal
;
8076 /* For RELA architectures, return the relocation value for a
8077 relocation against a local symbol. */
8080 _bfd_elf_rela_local_sym (bfd
*abfd
,
8081 Elf_Internal_Sym
*sym
,
8083 Elf_Internal_Rela
*rel
)
8085 asection
*sec
= *psec
;
8088 relocation
= (sec
->output_section
->vma
8089 + sec
->output_offset
8091 if ((sec
->flags
& SEC_MERGE
)
8092 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8093 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8096 _bfd_merged_section_offset (abfd
, psec
,
8097 elf_section_data (sec
)->sec_info
,
8098 sym
->st_value
+ rel
->r_addend
);
8101 /* If we have changed the section, and our original section is
8102 marked with SEC_EXCLUDE, it means that the original
8103 SEC_MERGE section has been completely subsumed in some
8104 other SEC_MERGE section. In this case, we need to leave
8105 some info around for --emit-relocs. */
8106 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8107 sec
->kept_section
= *psec
;
8110 rel
->r_addend
-= relocation
;
8111 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8117 _bfd_elf_rel_local_sym (bfd
*abfd
,
8118 Elf_Internal_Sym
*sym
,
8122 asection
*sec
= *psec
;
8124 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8125 return sym
->st_value
+ addend
;
8127 return _bfd_merged_section_offset (abfd
, psec
,
8128 elf_section_data (sec
)->sec_info
,
8129 sym
->st_value
+ addend
);
8133 _bfd_elf_section_offset (bfd
*abfd
,
8134 struct bfd_link_info
*info
,
8138 switch (sec
->sec_info_type
)
8140 case ELF_INFO_TYPE_STABS
:
8141 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8143 case ELF_INFO_TYPE_EH_FRAME
:
8144 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8150 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8151 reconstruct an ELF file by reading the segments out of remote memory
8152 based on the ELF file header at EHDR_VMA and the ELF program headers it
8153 points to. If not null, *LOADBASEP is filled in with the difference
8154 between the VMAs from which the segments were read, and the VMAs the
8155 file headers (and hence BFD's idea of each section's VMA) put them at.
8157 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8158 remote memory at target address VMA into the local buffer at MYADDR; it
8159 should return zero on success or an `errno' code on failure. TEMPL must
8160 be a BFD for an ELF target with the word size and byte order found in
8161 the remote memory. */
8164 bfd_elf_bfd_from_remote_memory
8168 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8170 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8171 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8175 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8176 long symcount ATTRIBUTE_UNUSED
,
8177 asymbol
**syms ATTRIBUTE_UNUSED
,
8182 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8185 const char *relplt_name
;
8186 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8190 Elf_Internal_Shdr
*hdr
;
8196 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8199 if (dynsymcount
<= 0)
8202 if (!bed
->plt_sym_val
)
8205 relplt_name
= bed
->relplt_name
;
8206 if (relplt_name
== NULL
)
8207 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8208 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8212 hdr
= &elf_section_data (relplt
)->this_hdr
;
8213 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8214 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8217 plt
= bfd_get_section_by_name (abfd
, ".plt");
8221 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8222 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8225 count
= relplt
->size
/ hdr
->sh_entsize
;
8226 size
= count
* sizeof (asymbol
);
8227 p
= relplt
->relocation
;
8228 for (i
= 0; i
< count
; i
++, s
++, p
++)
8229 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8231 s
= *ret
= bfd_malloc (size
);
8235 names
= (char *) (s
+ count
);
8236 p
= relplt
->relocation
;
8238 for (i
= 0; i
< count
; i
++, s
++, p
++)
8243 addr
= bed
->plt_sym_val (i
, plt
, p
);
8244 if (addr
== (bfd_vma
) -1)
8247 *s
= **p
->sym_ptr_ptr
;
8248 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8249 we are defining a symbol, ensure one of them is set. */
8250 if ((s
->flags
& BSF_LOCAL
) == 0)
8251 s
->flags
|= BSF_GLOBAL
;
8253 s
->value
= addr
- plt
->vma
;
8255 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8256 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8258 memcpy (names
, "@plt", sizeof ("@plt"));
8259 names
+= sizeof ("@plt");
8266 /* Sort symbol by binding and section. We want to put definitions
8267 sorted by section at the beginning. */
8270 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8272 const Elf_Internal_Sym
*s1
;
8273 const Elf_Internal_Sym
*s2
;
8276 /* Make sure that undefined symbols are at the end. */
8277 s1
= (const Elf_Internal_Sym
*) arg1
;
8278 if (s1
->st_shndx
== SHN_UNDEF
)
8280 s2
= (const Elf_Internal_Sym
*) arg2
;
8281 if (s2
->st_shndx
== SHN_UNDEF
)
8284 /* Sorted by section index. */
8285 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8289 /* Sorted by binding. */
8290 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8295 Elf_Internal_Sym
*sym
;
8300 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8302 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8303 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8304 return strcmp (s1
->name
, s2
->name
);
8307 /* Check if 2 sections define the same set of local and global
8311 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8314 const struct elf_backend_data
*bed1
, *bed2
;
8315 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8316 bfd_size_type symcount1
, symcount2
;
8317 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8318 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8319 Elf_Internal_Sym
*isymend
;
8320 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8321 bfd_size_type count1
, count2
, i
;
8328 /* If both are .gnu.linkonce sections, they have to have the same
8330 if (strncmp (sec1
->name
, ".gnu.linkonce",
8331 sizeof ".gnu.linkonce" - 1) == 0
8332 && strncmp (sec2
->name
, ".gnu.linkonce",
8333 sizeof ".gnu.linkonce" - 1) == 0)
8334 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8335 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8337 /* Both sections have to be in ELF. */
8338 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8339 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8342 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8345 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8346 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8348 /* If both are members of section groups, they have to have the
8350 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8354 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8355 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8356 if (shndx1
== -1 || shndx2
== -1)
8359 bed1
= get_elf_backend_data (bfd1
);
8360 bed2
= get_elf_backend_data (bfd2
);
8361 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8362 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8363 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8364 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8366 if (symcount1
== 0 || symcount2
== 0)
8369 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8371 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8375 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8378 /* Sort symbols by binding and section. Global definitions are at
8380 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8381 elf_sort_elf_symbol
);
8382 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8383 elf_sort_elf_symbol
);
8385 /* Count definitions in the section. */
8387 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8388 isym
< isymend
; isym
++)
8390 if (isym
->st_shndx
== (unsigned int) shndx1
)
8397 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8402 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8403 isym
< isymend
; isym
++)
8405 if (isym
->st_shndx
== (unsigned int) shndx2
)
8412 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8416 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8419 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8420 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8422 if (symtable1
== NULL
|| symtable2
== NULL
)
8426 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8427 isym
< isymend
; isym
++)
8430 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8437 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8438 isym
< isymend
; isym
++)
8441 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8447 /* Sort symbol by name. */
8448 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8449 elf_sym_name_compare
);
8450 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8451 elf_sym_name_compare
);
8453 for (i
= 0; i
< count1
; i
++)
8454 /* Two symbols must have the same binding, type and name. */
8455 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8456 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8457 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8475 /* It is only used by x86-64 so far. */
8476 asection _bfd_elf_large_com_section
8477 = BFD_FAKE_SECTION (_bfd_elf_large_com_section
,
8478 SEC_IS_COMMON
, NULL
, NULL
, "LARGE_COMMON",
8481 /* Return TRUE if 2 section types are compatible. */
8484 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
8485 bfd
*bbfd
, const asection
*bsec
)
8489 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
8490 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8493 return elf_section_type (asec
) == elf_section_type (bsec
);