1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
35 /* For sparc64-cross-sparc32. */
44 static INLINE
struct elf_segment_map
*make_mapping
45 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
46 static boolean map_sections_to_segments
PARAMS ((bfd
*));
47 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
48 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
49 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
50 static boolean prep_headers
PARAMS ((bfd
*));
51 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
52 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
53 static char *elf_read
PARAMS ((bfd
*, long, unsigned int));
54 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
55 static boolean assign_section_numbers
PARAMS ((bfd
*));
56 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
57 static boolean elf_map_symbols
PARAMS ((bfd
*));
58 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
59 static boolean elfcore_read_notes
PARAMS ((bfd
*, bfd_vma
, bfd_vma
));
60 static boolean elf_find_function
PARAMS ((bfd
*, asection
*, asymbol
**,
61 bfd_vma
, const char **,
63 static int elfcore_make_pid
PARAMS ((bfd
*));
64 static boolean elfcore_maybe_make_sect
PARAMS ((bfd
*, char *, asection
*));
65 static boolean elfcore_make_note_pseudosection
PARAMS ((bfd
*, char *,
66 Elf_Internal_Note
*));
67 static boolean elfcore_grok_prfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
68 static boolean elfcore_grok_prxfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
69 static boolean elfcore_grok_note
PARAMS ((bfd
*, Elf_Internal_Note
*));
71 /* Swap version information in and out. The version information is
72 currently size independent. If that ever changes, this code will
73 need to move into elfcode.h. */
75 /* Swap in a Verdef structure. */
78 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
80 const Elf_External_Verdef
*src
;
81 Elf_Internal_Verdef
*dst
;
83 dst
->vd_version
= bfd_h_get_16 (abfd
, src
->vd_version
);
84 dst
->vd_flags
= bfd_h_get_16 (abfd
, src
->vd_flags
);
85 dst
->vd_ndx
= bfd_h_get_16 (abfd
, src
->vd_ndx
);
86 dst
->vd_cnt
= bfd_h_get_16 (abfd
, src
->vd_cnt
);
87 dst
->vd_hash
= bfd_h_get_32 (abfd
, src
->vd_hash
);
88 dst
->vd_aux
= bfd_h_get_32 (abfd
, src
->vd_aux
);
89 dst
->vd_next
= bfd_h_get_32 (abfd
, src
->vd_next
);
92 /* Swap out a Verdef structure. */
95 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
97 const Elf_Internal_Verdef
*src
;
98 Elf_External_Verdef
*dst
;
100 bfd_h_put_16 (abfd
, src
->vd_version
, dst
->vd_version
);
101 bfd_h_put_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
102 bfd_h_put_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
103 bfd_h_put_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
104 bfd_h_put_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
105 bfd_h_put_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
106 bfd_h_put_32 (abfd
, src
->vd_next
, dst
->vd_next
);
109 /* Swap in a Verdaux structure. */
112 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
114 const Elf_External_Verdaux
*src
;
115 Elf_Internal_Verdaux
*dst
;
117 dst
->vda_name
= bfd_h_get_32 (abfd
, src
->vda_name
);
118 dst
->vda_next
= bfd_h_get_32 (abfd
, src
->vda_next
);
121 /* Swap out a Verdaux structure. */
124 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
126 const Elf_Internal_Verdaux
*src
;
127 Elf_External_Verdaux
*dst
;
129 bfd_h_put_32 (abfd
, src
->vda_name
, dst
->vda_name
);
130 bfd_h_put_32 (abfd
, src
->vda_next
, dst
->vda_next
);
133 /* Swap in a Verneed structure. */
136 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
138 const Elf_External_Verneed
*src
;
139 Elf_Internal_Verneed
*dst
;
141 dst
->vn_version
= bfd_h_get_16 (abfd
, src
->vn_version
);
142 dst
->vn_cnt
= bfd_h_get_16 (abfd
, src
->vn_cnt
);
143 dst
->vn_file
= bfd_h_get_32 (abfd
, src
->vn_file
);
144 dst
->vn_aux
= bfd_h_get_32 (abfd
, src
->vn_aux
);
145 dst
->vn_next
= bfd_h_get_32 (abfd
, src
->vn_next
);
148 /* Swap out a Verneed structure. */
151 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
153 const Elf_Internal_Verneed
*src
;
154 Elf_External_Verneed
*dst
;
156 bfd_h_put_16 (abfd
, src
->vn_version
, dst
->vn_version
);
157 bfd_h_put_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
158 bfd_h_put_32 (abfd
, src
->vn_file
, dst
->vn_file
);
159 bfd_h_put_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
160 bfd_h_put_32 (abfd
, src
->vn_next
, dst
->vn_next
);
163 /* Swap in a Vernaux structure. */
166 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
168 const Elf_External_Vernaux
*src
;
169 Elf_Internal_Vernaux
*dst
;
171 dst
->vna_hash
= bfd_h_get_32 (abfd
, src
->vna_hash
);
172 dst
->vna_flags
= bfd_h_get_16 (abfd
, src
->vna_flags
);
173 dst
->vna_other
= bfd_h_get_16 (abfd
, src
->vna_other
);
174 dst
->vna_name
= bfd_h_get_32 (abfd
, src
->vna_name
);
175 dst
->vna_next
= bfd_h_get_32 (abfd
, src
->vna_next
);
178 /* Swap out a Vernaux structure. */
181 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
183 const Elf_Internal_Vernaux
*src
;
184 Elf_External_Vernaux
*dst
;
186 bfd_h_put_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
187 bfd_h_put_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
188 bfd_h_put_16 (abfd
, src
->vna_other
, dst
->vna_other
);
189 bfd_h_put_32 (abfd
, src
->vna_name
, dst
->vna_name
);
190 bfd_h_put_32 (abfd
, src
->vna_next
, dst
->vna_next
);
193 /* Swap in a Versym structure. */
196 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
198 const Elf_External_Versym
*src
;
199 Elf_Internal_Versym
*dst
;
201 dst
->vs_vers
= bfd_h_get_16 (abfd
, src
->vs_vers
);
204 /* Swap out a Versym structure. */
207 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
209 const Elf_Internal_Versym
*src
;
210 Elf_External_Versym
*dst
;
212 bfd_h_put_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
215 /* Standard ELF hash function. Do not change this function; you will
216 cause invalid hash tables to be generated. */
219 bfd_elf_hash (namearg
)
222 const unsigned char *name
= (const unsigned char *) namearg
;
227 while ((ch
= *name
++) != '\0')
230 if ((g
= (h
& 0xf0000000)) != 0)
233 /* The ELF ABI says `h &= ~g', but this is equivalent in
234 this case and on some machines one insn instead of two. */
241 /* Read a specified number of bytes at a specified offset in an ELF
242 file, into a newly allocated buffer, and return a pointer to the
246 elf_read (abfd
, offset
, size
)
253 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
255 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
257 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
259 if (bfd_get_error () != bfd_error_system_call
)
260 bfd_set_error (bfd_error_file_truncated
);
267 bfd_elf_mkobject (abfd
)
270 /* This just does initialization. */
271 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
272 elf_tdata (abfd
) = (struct elf_obj_tdata
*)
273 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
274 if (elf_tdata (abfd
) == 0)
276 /* Since everything is done at close time, do we need any
283 bfd_elf_mkcorefile (abfd
)
286 /* I think this can be done just like an object file. */
287 return bfd_elf_mkobject (abfd
);
291 bfd_elf_get_str_section (abfd
, shindex
)
293 unsigned int shindex
;
295 Elf_Internal_Shdr
**i_shdrp
;
296 char *shstrtab
= NULL
;
298 unsigned int shstrtabsize
;
300 i_shdrp
= elf_elfsections (abfd
);
301 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
304 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
305 if (shstrtab
== NULL
)
307 /* No cached one, attempt to read, and cache what we read. */
308 offset
= i_shdrp
[shindex
]->sh_offset
;
309 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
310 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
311 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
317 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
319 unsigned int shindex
;
320 unsigned int strindex
;
322 Elf_Internal_Shdr
*hdr
;
327 hdr
= elf_elfsections (abfd
)[shindex
];
329 if (hdr
->contents
== NULL
330 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
333 if (strindex
>= hdr
->sh_size
)
335 (*_bfd_error_handler
)
336 (_("%s: invalid string offset %u >= %lu for section `%s'"),
337 bfd_get_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
338 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
339 && strindex
== hdr
->sh_name
)
341 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
345 return ((char *) hdr
->contents
) + strindex
;
348 /* Make a BFD section from an ELF section. We store a pointer to the
349 BFD section in the bfd_section field of the header. */
352 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
354 Elf_Internal_Shdr
*hdr
;
359 struct elf_backend_data
*bed
;
361 if (hdr
->bfd_section
!= NULL
)
363 BFD_ASSERT (strcmp (name
,
364 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
368 newsect
= bfd_make_section_anyway (abfd
, name
);
372 newsect
->filepos
= hdr
->sh_offset
;
374 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
375 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
376 || ! bfd_set_section_alignment (abfd
, newsect
,
377 bfd_log2 (hdr
->sh_addralign
)))
380 flags
= SEC_NO_FLAGS
;
381 if (hdr
->sh_type
!= SHT_NOBITS
)
382 flags
|= SEC_HAS_CONTENTS
;
383 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
386 if (hdr
->sh_type
!= SHT_NOBITS
)
389 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
390 flags
|= SEC_READONLY
;
391 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
393 else if ((flags
& SEC_LOAD
) != 0)
395 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
398 newsect
->entsize
= hdr
->sh_entsize
;
399 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
400 flags
|= SEC_STRINGS
;
403 /* The debugging sections appear to be recognized only by name, not
406 static const char *debug_sec_names
[] =
415 for (i
= sizeof (debug_sec_names
) / sizeof (debug_sec_names
[0]); i
--;)
416 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
420 flags
|= SEC_DEBUGGING
;
423 /* As a GNU extension, if the name begins with .gnu.linkonce, we
424 only link a single copy of the section. This is used to support
425 g++. g++ will emit each template expansion in its own section.
426 The symbols will be defined as weak, so that multiple definitions
427 are permitted. The GNU linker extension is to actually discard
428 all but one of the sections. */
429 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
430 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
432 bed
= get_elf_backend_data (abfd
);
433 if (bed
->elf_backend_section_flags
)
434 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
437 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
440 if ((flags
& SEC_ALLOC
) != 0)
442 Elf_Internal_Phdr
*phdr
;
445 /* Look through the phdrs to see if we need to adjust the lma.
446 If all the p_paddr fields are zero, we ignore them, since
447 some ELF linkers produce such output. */
448 phdr
= elf_tdata (abfd
)->phdr
;
449 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
451 if (phdr
->p_paddr
!= 0)
454 if (i
< elf_elfheader (abfd
)->e_phnum
)
456 phdr
= elf_tdata (abfd
)->phdr
;
457 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
459 if (phdr
->p_type
== PT_LOAD
460 && phdr
->p_vaddr
!= phdr
->p_paddr
461 && phdr
->p_vaddr
<= hdr
->sh_addr
462 && (phdr
->p_vaddr
+ phdr
->p_memsz
463 >= hdr
->sh_addr
+ hdr
->sh_size
)
464 && ((flags
& SEC_LOAD
) == 0
465 || (phdr
->p_offset
<= (bfd_vma
) hdr
->sh_offset
466 && (phdr
->p_offset
+ phdr
->p_filesz
467 >= hdr
->sh_offset
+ hdr
->sh_size
))))
469 newsect
->lma
+= phdr
->p_paddr
- phdr
->p_vaddr
;
476 hdr
->bfd_section
= newsect
;
477 elf_section_data (newsect
)->this_hdr
= *hdr
;
487 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
490 Helper functions for GDB to locate the string tables.
491 Since BFD hides string tables from callers, GDB needs to use an
492 internal hook to find them. Sun's .stabstr, in particular,
493 isn't even pointed to by the .stab section, so ordinary
494 mechanisms wouldn't work to find it, even if we had some.
497 struct elf_internal_shdr
*
498 bfd_elf_find_section (abfd
, name
)
502 Elf_Internal_Shdr
**i_shdrp
;
507 i_shdrp
= elf_elfsections (abfd
);
510 shstrtab
= bfd_elf_get_str_section
511 (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
512 if (shstrtab
!= NULL
)
514 max
= elf_elfheader (abfd
)->e_shnum
;
515 for (i
= 1; i
< max
; i
++)
516 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
523 const char *const bfd_elf_section_type_names
[] = {
524 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
525 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
526 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
529 /* ELF relocs are against symbols. If we are producing relocateable
530 output, and the reloc is against an external symbol, and nothing
531 has given us any additional addend, the resulting reloc will also
532 be against the same symbol. In such a case, we don't want to
533 change anything about the way the reloc is handled, since it will
534 all be done at final link time. Rather than put special case code
535 into bfd_perform_relocation, all the reloc types use this howto
536 function. It just short circuits the reloc if producing
537 relocateable output against an external symbol. */
539 bfd_reloc_status_type
540 bfd_elf_generic_reloc (abfd
,
547 bfd
*abfd ATTRIBUTE_UNUSED
;
548 arelent
*reloc_entry
;
550 PTR data ATTRIBUTE_UNUSED
;
551 asection
*input_section
;
553 char **error_message ATTRIBUTE_UNUSED
;
555 if (output_bfd
!= (bfd
*) NULL
556 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
557 && (! reloc_entry
->howto
->partial_inplace
558 || reloc_entry
->addend
== 0))
560 reloc_entry
->address
+= input_section
->output_offset
;
564 return bfd_reloc_continue
;
567 /* Finish SHF_MERGE section merging. */
570 _bfd_elf_merge_sections (abfd
, info
)
572 struct bfd_link_info
*info
;
574 if (!is_elf_hash_table (info
))
576 if (elf_hash_table (info
)->merge_info
)
577 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
);
581 /* Print out the program headers. */
584 _bfd_elf_print_private_bfd_data (abfd
, farg
)
588 FILE *f
= (FILE *) farg
;
589 Elf_Internal_Phdr
*p
;
591 bfd_byte
*dynbuf
= NULL
;
593 p
= elf_tdata (abfd
)->phdr
;
598 fprintf (f
, _("\nProgram Header:\n"));
599 c
= elf_elfheader (abfd
)->e_phnum
;
600 for (i
= 0; i
< c
; i
++, p
++)
607 case PT_NULL
: s
= "NULL"; break;
608 case PT_LOAD
: s
= "LOAD"; break;
609 case PT_DYNAMIC
: s
= "DYNAMIC"; break;
610 case PT_INTERP
: s
= "INTERP"; break;
611 case PT_NOTE
: s
= "NOTE"; break;
612 case PT_SHLIB
: s
= "SHLIB"; break;
613 case PT_PHDR
: s
= "PHDR"; break;
614 default: sprintf (buf
, "0x%lx", p
->p_type
); s
= buf
; break;
616 fprintf (f
, "%8s off 0x", s
);
617 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
618 fprintf (f
, " vaddr 0x");
619 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
620 fprintf (f
, " paddr 0x");
621 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
622 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
623 fprintf (f
, " filesz 0x");
624 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
625 fprintf (f
, " memsz 0x");
626 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
627 fprintf (f
, " flags %c%c%c",
628 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
629 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
630 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
631 if ((p
->p_flags
&~ (PF_R
| PF_W
| PF_X
)) != 0)
632 fprintf (f
, " %lx", p
->p_flags
&~ (PF_R
| PF_W
| PF_X
));
637 s
= bfd_get_section_by_name (abfd
, ".dynamic");
642 bfd_byte
*extdyn
, *extdynend
;
644 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
646 fprintf (f
, _("\nDynamic Section:\n"));
648 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
651 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
655 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
658 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
660 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
661 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
664 extdynend
= extdyn
+ s
->_raw_size
;
665 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
667 Elf_Internal_Dyn dyn
;
672 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
674 if (dyn
.d_tag
== DT_NULL
)
681 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
685 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
686 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
687 case DT_PLTGOT
: name
= "PLTGOT"; break;
688 case DT_HASH
: name
= "HASH"; break;
689 case DT_STRTAB
: name
= "STRTAB"; break;
690 case DT_SYMTAB
: name
= "SYMTAB"; break;
691 case DT_RELA
: name
= "RELA"; break;
692 case DT_RELASZ
: name
= "RELASZ"; break;
693 case DT_RELAENT
: name
= "RELAENT"; break;
694 case DT_STRSZ
: name
= "STRSZ"; break;
695 case DT_SYMENT
: name
= "SYMENT"; break;
696 case DT_INIT
: name
= "INIT"; break;
697 case DT_FINI
: name
= "FINI"; break;
698 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
699 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
700 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
701 case DT_REL
: name
= "REL"; break;
702 case DT_RELSZ
: name
= "RELSZ"; break;
703 case DT_RELENT
: name
= "RELENT"; break;
704 case DT_PLTREL
: name
= "PLTREL"; break;
705 case DT_DEBUG
: name
= "DEBUG"; break;
706 case DT_TEXTREL
: name
= "TEXTREL"; break;
707 case DT_JMPREL
: name
= "JMPREL"; break;
708 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
709 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
710 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
711 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
712 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
713 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
714 case DT_FLAGS
: name
= "FLAGS"; break;
715 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
716 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
717 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
718 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
719 case DT_MOVEENT
: name
= "MOVEENT"; break;
720 case DT_MOVESZ
: name
= "MOVESZ"; break;
721 case DT_FEATURE
: name
= "FEATURE"; break;
722 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
723 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
724 case DT_SYMINENT
: name
= "SYMINENT"; break;
725 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
726 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
727 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
728 case DT_PLTPAD
: name
= "PLTPAD"; break;
729 case DT_MOVETAB
: name
= "MOVETAB"; break;
730 case DT_SYMINFO
: name
= "SYMINFO"; break;
731 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
732 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
733 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
734 case DT_VERSYM
: name
= "VERSYM"; break;
735 case DT_VERDEF
: name
= "VERDEF"; break;
736 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
737 case DT_VERNEED
: name
= "VERNEED"; break;
738 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
739 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
740 case DT_USED
: name
= "USED"; break;
741 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
744 fprintf (f
, " %-11s ", name
);
746 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
751 string
= bfd_elf_string_from_elf_section (abfd
, link
,
755 fprintf (f
, "%s", string
);
764 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
765 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
767 if (! _bfd_elf_slurp_version_tables (abfd
))
771 if (elf_dynverdef (abfd
) != 0)
773 Elf_Internal_Verdef
*t
;
775 fprintf (f
, _("\nVersion definitions:\n"));
776 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
778 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
779 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
780 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
782 Elf_Internal_Verdaux
*a
;
785 for (a
= t
->vd_auxptr
->vda_nextptr
;
788 fprintf (f
, "%s ", a
->vda_nodename
);
794 if (elf_dynverref (abfd
) != 0)
796 Elf_Internal_Verneed
*t
;
798 fprintf (f
, _("\nVersion References:\n"));
799 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
801 Elf_Internal_Vernaux
*a
;
803 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
804 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
805 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
806 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
818 /* Display ELF-specific fields of a symbol. */
821 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
825 bfd_print_symbol_type how
;
827 FILE *file
= (FILE *) filep
;
830 case bfd_print_symbol_name
:
831 fprintf (file
, "%s", symbol
->name
);
833 case bfd_print_symbol_more
:
834 fprintf (file
, "elf ");
835 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
836 fprintf (file
, " %lx", (long) symbol
->flags
);
838 case bfd_print_symbol_all
:
840 const char *section_name
;
841 const char *name
= NULL
;
842 struct elf_backend_data
*bed
;
843 unsigned char st_other
;
845 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
847 bed
= get_elf_backend_data (abfd
);
848 if (bed
->elf_backend_print_symbol_all
)
849 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
854 bfd_print_symbol_vandf (abfd
, (PTR
) file
, symbol
);
857 fprintf (file
, " %s\t", section_name
);
858 /* Print the "other" value for a symbol. For common symbols,
859 we've already printed the size; now print the alignment.
860 For other symbols, we have no specified alignment, and
861 we've printed the address; now print the size. */
862 bfd_fprintf_vma (abfd
, file
,
863 (bfd_is_com_section (symbol
->section
)
864 ? ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
865 : ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
));
867 /* If we have version information, print it. */
868 if (elf_tdata (abfd
)->dynversym_section
!= 0
869 && (elf_tdata (abfd
)->dynverdef_section
!= 0
870 || elf_tdata (abfd
)->dynverref_section
!= 0))
873 const char *version_string
;
875 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
879 else if (vernum
== 1)
880 version_string
= "Base";
881 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
883 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
886 Elf_Internal_Verneed
*t
;
889 for (t
= elf_tdata (abfd
)->verref
;
893 Elf_Internal_Vernaux
*a
;
895 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
897 if (a
->vna_other
== vernum
)
899 version_string
= a
->vna_nodename
;
906 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
907 fprintf (file
, " %-11s", version_string
);
912 fprintf (file
, " (%s)", version_string
);
913 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
918 /* If the st_other field is not zero, print it. */
919 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
924 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
925 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
926 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
928 /* Some other non-defined flags are also present, so print
930 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
933 fprintf (file
, " %s", name
);
939 /* Create an entry in an ELF linker hash table. */
941 struct bfd_hash_entry
*
942 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
943 struct bfd_hash_entry
*entry
;
944 struct bfd_hash_table
*table
;
947 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
949 /* Allocate the structure if it has not already been allocated by a
951 if (ret
== (struct elf_link_hash_entry
*) NULL
)
952 ret
= ((struct elf_link_hash_entry
*)
953 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
)));
954 if (ret
== (struct elf_link_hash_entry
*) NULL
)
955 return (struct bfd_hash_entry
*) ret
;
957 /* Call the allocation method of the superclass. */
958 ret
= ((struct elf_link_hash_entry
*)
959 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
961 if (ret
!= (struct elf_link_hash_entry
*) NULL
)
963 /* Set local fields. */
967 ret
->dynstr_index
= 0;
969 ret
->got
.offset
= (bfd_vma
) -1;
970 ret
->plt
.offset
= (bfd_vma
) -1;
971 ret
->linker_section_pointer
= (elf_linker_section_pointers_t
*)0;
972 ret
->verinfo
.verdef
= NULL
;
973 ret
->vtable_entries_used
= NULL
;
974 ret
->vtable_entries_size
= 0;
975 ret
->vtable_parent
= NULL
;
976 ret
->type
= STT_NOTYPE
;
978 /* Assume that we have been called by a non-ELF symbol reader.
979 This flag is then reset by the code which reads an ELF input
980 file. This ensures that a symbol created by a non-ELF symbol
981 reader will have the flag set correctly. */
982 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
985 return (struct bfd_hash_entry
*) ret
;
988 /* Copy data from an indirect symbol to its direct symbol, hiding the
989 old indirect symbol. */
992 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
993 struct elf_link_hash_entry
*dir
, *ind
;
995 /* Copy down any references that we may have already seen to the
996 symbol which just became indirect. */
998 dir
->elf_link_hash_flags
|=
999 (ind
->elf_link_hash_flags
1000 & (ELF_LINK_HASH_REF_DYNAMIC
1001 | ELF_LINK_HASH_REF_REGULAR
1002 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1003 | ELF_LINK_NON_GOT_REF
));
1005 /* Copy over the global and procedure linkage table offset entries.
1006 These may have been already set up by a check_relocs routine. */
1007 if (dir
->got
.offset
== (bfd_vma
) -1)
1009 dir
->got
.offset
= ind
->got
.offset
;
1010 ind
->got
.offset
= (bfd_vma
) -1;
1012 BFD_ASSERT (ind
->got
.offset
== (bfd_vma
) -1);
1014 if (dir
->plt
.offset
== (bfd_vma
) -1)
1016 dir
->plt
.offset
= ind
->plt
.offset
;
1017 ind
->plt
.offset
= (bfd_vma
) -1;
1019 BFD_ASSERT (ind
->plt
.offset
== (bfd_vma
) -1);
1021 if (dir
->dynindx
== -1)
1023 dir
->dynindx
= ind
->dynindx
;
1024 dir
->dynstr_index
= ind
->dynstr_index
;
1026 ind
->dynstr_index
= 0;
1028 BFD_ASSERT (ind
->dynindx
== -1);
1032 _bfd_elf_link_hash_hide_symbol (info
, h
)
1033 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1034 struct elf_link_hash_entry
*h
;
1036 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1037 h
->plt
.offset
= (bfd_vma
) -1;
1038 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
1042 /* Initialize an ELF linker hash table. */
1045 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1046 struct elf_link_hash_table
*table
;
1048 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1049 struct bfd_hash_table
*,
1054 table
->dynamic_sections_created
= false;
1055 table
->dynobj
= NULL
;
1056 /* The first dynamic symbol is a dummy. */
1057 table
->dynsymcount
= 1;
1058 table
->dynstr
= NULL
;
1059 table
->bucketcount
= 0;
1060 table
->needed
= NULL
;
1061 table
->runpath
= NULL
;
1063 table
->stab_info
= NULL
;
1064 table
->merge_info
= NULL
;
1065 table
->dynlocal
= NULL
;
1066 ret
= _bfd_link_hash_table_init (& table
->root
, abfd
, newfunc
);
1067 table
->root
.type
= bfd_link_elf_hash_table
;
1072 /* Create an ELF linker hash table. */
1074 struct bfd_link_hash_table
*
1075 _bfd_elf_link_hash_table_create (abfd
)
1078 struct elf_link_hash_table
*ret
;
1080 ret
= ((struct elf_link_hash_table
*)
1081 bfd_alloc (abfd
, sizeof (struct elf_link_hash_table
)));
1082 if (ret
== (struct elf_link_hash_table
*) NULL
)
1085 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1087 bfd_release (abfd
, ret
);
1094 /* This is a hook for the ELF emulation code in the generic linker to
1095 tell the backend linker what file name to use for the DT_NEEDED
1096 entry for a dynamic object. The generic linker passes name as an
1097 empty string to indicate that no DT_NEEDED entry should be made. */
1100 bfd_elf_set_dt_needed_name (abfd
, name
)
1104 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1105 && bfd_get_format (abfd
) == bfd_object
)
1106 elf_dt_name (abfd
) = name
;
1110 bfd_elf_set_dt_needed_soname (abfd
, name
)
1114 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1115 && bfd_get_format (abfd
) == bfd_object
)
1116 elf_dt_soname (abfd
) = name
;
1119 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1120 the linker ELF emulation code. */
1122 struct bfd_link_needed_list
*
1123 bfd_elf_get_needed_list (abfd
, info
)
1124 bfd
*abfd ATTRIBUTE_UNUSED
;
1125 struct bfd_link_info
*info
;
1127 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1129 return elf_hash_table (info
)->needed
;
1132 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1133 hook for the linker ELF emulation code. */
1135 struct bfd_link_needed_list
*
1136 bfd_elf_get_runpath_list (abfd
, info
)
1137 bfd
*abfd ATTRIBUTE_UNUSED
;
1138 struct bfd_link_info
*info
;
1140 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1142 return elf_hash_table (info
)->runpath
;
1145 /* Get the name actually used for a dynamic object for a link. This
1146 is the SONAME entry if there is one. Otherwise, it is the string
1147 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1150 bfd_elf_get_dt_soname (abfd
)
1153 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1154 && bfd_get_format (abfd
) == bfd_object
)
1155 return elf_dt_name (abfd
);
1159 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1160 the ELF linker emulation code. */
1163 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1165 struct bfd_link_needed_list
**pneeded
;
1168 bfd_byte
*dynbuf
= NULL
;
1171 bfd_byte
*extdyn
, *extdynend
;
1173 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1177 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1178 || bfd_get_format (abfd
) != bfd_object
)
1181 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1182 if (s
== NULL
|| s
->_raw_size
== 0)
1185 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1189 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1193 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1197 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1199 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1200 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1203 extdynend
= extdyn
+ s
->_raw_size
;
1204 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1206 Elf_Internal_Dyn dyn
;
1208 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1210 if (dyn
.d_tag
== DT_NULL
)
1213 if (dyn
.d_tag
== DT_NEEDED
)
1216 struct bfd_link_needed_list
*l
;
1218 string
= bfd_elf_string_from_elf_section (abfd
, link
,
1223 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, sizeof *l
);
1244 /* Allocate an ELF string table--force the first byte to be zero. */
1246 struct bfd_strtab_hash
*
1247 _bfd_elf_stringtab_init ()
1249 struct bfd_strtab_hash
*ret
;
1251 ret
= _bfd_stringtab_init ();
1256 loc
= _bfd_stringtab_add (ret
, "", true, false);
1257 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1258 if (loc
== (bfd_size_type
) -1)
1260 _bfd_stringtab_free (ret
);
1267 /* ELF .o/exec file reading */
1269 /* Create a new bfd section from an ELF section header. */
1272 bfd_section_from_shdr (abfd
, shindex
)
1274 unsigned int shindex
;
1276 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1277 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1278 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1281 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1283 switch (hdr
->sh_type
)
1286 /* Inactive section. Throw it away. */
1289 case SHT_PROGBITS
: /* Normal section with contents. */
1290 case SHT_DYNAMIC
: /* Dynamic linking information. */
1291 case SHT_NOBITS
: /* .bss section. */
1292 case SHT_HASH
: /* .hash section. */
1293 case SHT_NOTE
: /* .note section. */
1294 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1296 case SHT_SYMTAB
: /* A symbol table */
1297 if (elf_onesymtab (abfd
) == shindex
)
1300 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1301 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1302 elf_onesymtab (abfd
) = shindex
;
1303 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1304 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1305 abfd
->flags
|= HAS_SYMS
;
1307 /* Sometimes a shared object will map in the symbol table. If
1308 SHF_ALLOC is set, and this is a shared object, then we also
1309 treat this section as a BFD section. We can not base the
1310 decision purely on SHF_ALLOC, because that flag is sometimes
1311 set in a relocateable object file, which would confuse the
1313 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1314 && (abfd
->flags
& DYNAMIC
) != 0
1315 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1320 case SHT_DYNSYM
: /* A dynamic symbol table */
1321 if (elf_dynsymtab (abfd
) == shindex
)
1324 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1325 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1326 elf_dynsymtab (abfd
) = shindex
;
1327 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1328 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1329 abfd
->flags
|= HAS_SYMS
;
1331 /* Besides being a symbol table, we also treat this as a regular
1332 section, so that objcopy can handle it. */
1333 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1335 case SHT_STRTAB
: /* A string table */
1336 if (hdr
->bfd_section
!= NULL
)
1338 if (ehdr
->e_shstrndx
== shindex
)
1340 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1341 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1347 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
1349 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1350 if (hdr2
->sh_link
== shindex
)
1352 if (! bfd_section_from_shdr (abfd
, i
))
1354 if (elf_onesymtab (abfd
) == i
)
1356 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1357 elf_elfsections (abfd
)[shindex
] =
1358 &elf_tdata (abfd
)->strtab_hdr
;
1361 if (elf_dynsymtab (abfd
) == i
)
1363 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1364 elf_elfsections (abfd
)[shindex
] = hdr
=
1365 &elf_tdata (abfd
)->dynstrtab_hdr
;
1366 /* We also treat this as a regular section, so
1367 that objcopy can handle it. */
1370 #if 0 /* Not handling other string tables specially right now. */
1371 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1372 /* We have a strtab for some random other section. */
1373 newsect
= (asection
*) hdr2
->bfd_section
;
1376 hdr
->bfd_section
= newsect
;
1377 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1379 elf_elfsections (abfd
)[shindex
] = hdr2
;
1385 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1389 /* *These* do a lot of work -- but build no sections! */
1391 asection
*target_sect
;
1392 Elf_Internal_Shdr
*hdr2
;
1394 /* Check for a bogus link to avoid crashing. */
1395 if (hdr
->sh_link
>= ehdr
->e_shnum
)
1397 ((*_bfd_error_handler
)
1398 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1399 bfd_get_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1400 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1403 /* For some incomprehensible reason Oracle distributes
1404 libraries for Solaris in which some of the objects have
1405 bogus sh_link fields. It would be nice if we could just
1406 reject them, but, unfortunately, some people need to use
1407 them. We scan through the section headers; if we find only
1408 one suitable symbol table, we clobber the sh_link to point
1409 to it. I hope this doesn't break anything. */
1410 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1411 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1417 for (scan
= 1; scan
< ehdr
->e_shnum
; scan
++)
1419 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1420 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1431 hdr
->sh_link
= found
;
1434 /* Get the symbol table. */
1435 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1436 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1439 /* If this reloc section does not use the main symbol table we
1440 don't treat it as a reloc section. BFD can't adequately
1441 represent such a section, so at least for now, we don't
1442 try. We just present it as a normal section. We also
1443 can't use it as a reloc section if it points to the null
1445 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1446 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1448 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1450 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1451 if (target_sect
== NULL
)
1454 if ((target_sect
->flags
& SEC_RELOC
) == 0
1455 || target_sect
->reloc_count
== 0)
1456 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1459 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1460 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, sizeof (*hdr2
));
1461 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1464 elf_elfsections (abfd
)[shindex
] = hdr2
;
1465 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1466 target_sect
->flags
|= SEC_RELOC
;
1467 target_sect
->relocation
= NULL
;
1468 target_sect
->rel_filepos
= hdr
->sh_offset
;
1469 /* In the section to which the relocations apply, mark whether
1470 its relocations are of the REL or RELA variety. */
1471 if (hdr
->sh_size
!= 0)
1472 elf_section_data (target_sect
)->use_rela_p
1473 = (hdr
->sh_type
== SHT_RELA
);
1474 abfd
->flags
|= HAS_RELOC
;
1479 case SHT_GNU_verdef
:
1480 elf_dynverdef (abfd
) = shindex
;
1481 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1482 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1485 case SHT_GNU_versym
:
1486 elf_dynversym (abfd
) = shindex
;
1487 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1488 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1491 case SHT_GNU_verneed
:
1492 elf_dynverref (abfd
) = shindex
;
1493 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1494 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1501 /* Check for any processor-specific section types. */
1503 if (bed
->elf_backend_section_from_shdr
)
1504 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1512 /* Given an ELF section number, retrieve the corresponding BFD
1516 bfd_section_from_elf_index (abfd
, index
)
1520 BFD_ASSERT (index
> 0 && index
< SHN_LORESERVE
);
1521 if (index
>= elf_elfheader (abfd
)->e_shnum
)
1523 return elf_elfsections (abfd
)[index
]->bfd_section
;
1527 _bfd_elf_new_section_hook (abfd
, sec
)
1531 struct bfd_elf_section_data
*sdata
;
1533 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, sizeof (*sdata
));
1536 sec
->used_by_bfd
= (PTR
) sdata
;
1538 /* Indicate whether or not this section should use RELA relocations. */
1540 = get_elf_backend_data (abfd
)->default_use_rela_p
;
1545 /* Create a new bfd section from an ELF program header.
1547 Since program segments have no names, we generate a synthetic name
1548 of the form segment<NUM>, where NUM is generally the index in the
1549 program header table. For segments that are split (see below) we
1550 generate the names segment<NUM>a and segment<NUM>b.
1552 Note that some program segments may have a file size that is different than
1553 (less than) the memory size. All this means is that at execution the
1554 system must allocate the amount of memory specified by the memory size,
1555 but only initialize it with the first "file size" bytes read from the
1556 file. This would occur for example, with program segments consisting
1557 of combined data+bss.
1559 To handle the above situation, this routine generates TWO bfd sections
1560 for the single program segment. The first has the length specified by
1561 the file size of the segment, and the second has the length specified
1562 by the difference between the two sizes. In effect, the segment is split
1563 into it's initialized and uninitialized parts.
1568 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
1570 Elf_Internal_Phdr
*hdr
;
1572 const char *typename
;
1579 split
= ((hdr
->p_memsz
> 0)
1580 && (hdr
->p_filesz
> 0)
1581 && (hdr
->p_memsz
> hdr
->p_filesz
));
1582 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
1583 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1586 strcpy (name
, namebuf
);
1587 newsect
= bfd_make_section (abfd
, name
);
1588 if (newsect
== NULL
)
1590 newsect
->vma
= hdr
->p_vaddr
;
1591 newsect
->lma
= hdr
->p_paddr
;
1592 newsect
->_raw_size
= hdr
->p_filesz
;
1593 newsect
->filepos
= hdr
->p_offset
;
1594 newsect
->flags
|= SEC_HAS_CONTENTS
;
1595 if (hdr
->p_type
== PT_LOAD
)
1597 newsect
->flags
|= SEC_ALLOC
;
1598 newsect
->flags
|= SEC_LOAD
;
1599 if (hdr
->p_flags
& PF_X
)
1601 /* FIXME: all we known is that it has execute PERMISSION,
1603 newsect
->flags
|= SEC_CODE
;
1606 if (!(hdr
->p_flags
& PF_W
))
1608 newsect
->flags
|= SEC_READONLY
;
1613 sprintf (namebuf
, "%s%db", typename
, index
);
1614 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1617 strcpy (name
, namebuf
);
1618 newsect
= bfd_make_section (abfd
, name
);
1619 if (newsect
== NULL
)
1621 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
1622 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
1623 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
1624 if (hdr
->p_type
== PT_LOAD
)
1626 newsect
->flags
|= SEC_ALLOC
;
1627 if (hdr
->p_flags
& PF_X
)
1628 newsect
->flags
|= SEC_CODE
;
1630 if (!(hdr
->p_flags
& PF_W
))
1631 newsect
->flags
|= SEC_READONLY
;
1638 bfd_section_from_phdr (abfd
, hdr
, index
)
1640 Elf_Internal_Phdr
*hdr
;
1643 struct elf_backend_data
*bed
;
1645 switch (hdr
->p_type
)
1648 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
1651 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
1654 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
1657 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
1660 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
1662 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
1667 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
1670 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
1673 /* Check for any processor-specific program segment types.
1674 If no handler for them, default to making "segment" sections. */
1675 bed
= get_elf_backend_data (abfd
);
1676 if (bed
->elf_backend_section_from_phdr
)
1677 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
1679 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
1683 /* Initialize REL_HDR, the section-header for new section, containing
1684 relocations against ASECT. If USE_RELA_P is true, we use RELA
1685 relocations; otherwise, we use REL relocations. */
1688 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
1690 Elf_Internal_Shdr
*rel_hdr
;
1695 struct elf_backend_data
*bed
;
1697 bed
= get_elf_backend_data (abfd
);
1698 name
= bfd_alloc (abfd
, sizeof ".rela" + strlen (asect
->name
));
1701 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
1703 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd
), name
,
1705 if (rel_hdr
->sh_name
== (unsigned int) -1)
1707 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1708 rel_hdr
->sh_entsize
= (use_rela_p
1709 ? bed
->s
->sizeof_rela
1710 : bed
->s
->sizeof_rel
);
1711 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
1712 rel_hdr
->sh_flags
= 0;
1713 rel_hdr
->sh_addr
= 0;
1714 rel_hdr
->sh_size
= 0;
1715 rel_hdr
->sh_offset
= 0;
1720 /* Set up an ELF internal section header for a section. */
1723 elf_fake_sections (abfd
, asect
, failedptrarg
)
1728 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1729 boolean
*failedptr
= (boolean
*) failedptrarg
;
1730 Elf_Internal_Shdr
*this_hdr
;
1734 /* We already failed; just get out of the bfd_map_over_sections
1739 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1741 this_hdr
->sh_name
= (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd
),
1744 if (this_hdr
->sh_name
== (unsigned long) -1)
1750 this_hdr
->sh_flags
= 0;
1752 if ((asect
->flags
& SEC_ALLOC
) != 0
1753 || asect
->user_set_vma
)
1754 this_hdr
->sh_addr
= asect
->vma
;
1756 this_hdr
->sh_addr
= 0;
1758 this_hdr
->sh_offset
= 0;
1759 this_hdr
->sh_size
= asect
->_raw_size
;
1760 this_hdr
->sh_link
= 0;
1761 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1762 /* The sh_entsize and sh_info fields may have been set already by
1763 copy_private_section_data. */
1765 this_hdr
->bfd_section
= asect
;
1766 this_hdr
->contents
= NULL
;
1768 /* FIXME: This should not be based on section names. */
1769 if (strcmp (asect
->name
, ".dynstr") == 0)
1770 this_hdr
->sh_type
= SHT_STRTAB
;
1771 else if (strcmp (asect
->name
, ".hash") == 0)
1773 this_hdr
->sh_type
= SHT_HASH
;
1774 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
1776 else if (strcmp (asect
->name
, ".dynsym") == 0)
1778 this_hdr
->sh_type
= SHT_DYNSYM
;
1779 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
1781 else if (strcmp (asect
->name
, ".dynamic") == 0)
1783 this_hdr
->sh_type
= SHT_DYNAMIC
;
1784 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
1786 else if (strncmp (asect
->name
, ".rela", 5) == 0
1787 && get_elf_backend_data (abfd
)->may_use_rela_p
)
1789 this_hdr
->sh_type
= SHT_RELA
;
1790 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
1792 else if (strncmp (asect
->name
, ".rel", 4) == 0
1793 && get_elf_backend_data (abfd
)->may_use_rel_p
)
1795 this_hdr
->sh_type
= SHT_REL
;
1796 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
1798 else if (strncmp (asect
->name
, ".note", 5) == 0)
1799 this_hdr
->sh_type
= SHT_NOTE
;
1800 else if (strncmp (asect
->name
, ".stab", 5) == 0
1801 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
1802 this_hdr
->sh_type
= SHT_STRTAB
;
1803 else if (strcmp (asect
->name
, ".gnu.version") == 0)
1805 this_hdr
->sh_type
= SHT_GNU_versym
;
1806 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
1808 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
1810 this_hdr
->sh_type
= SHT_GNU_verdef
;
1811 this_hdr
->sh_entsize
= 0;
1812 /* objcopy or strip will copy over sh_info, but may not set
1813 cverdefs. The linker will set cverdefs, but sh_info will be
1815 if (this_hdr
->sh_info
== 0)
1816 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
1818 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
1819 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
1821 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
1823 this_hdr
->sh_type
= SHT_GNU_verneed
;
1824 this_hdr
->sh_entsize
= 0;
1825 /* objcopy or strip will copy over sh_info, but may not set
1826 cverrefs. The linker will set cverrefs, but sh_info will be
1828 if (this_hdr
->sh_info
== 0)
1829 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
1831 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
1832 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
1834 else if ((asect
->flags
& SEC_ALLOC
) != 0
1835 && ((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0))
1836 this_hdr
->sh_type
= SHT_NOBITS
;
1838 this_hdr
->sh_type
= SHT_PROGBITS
;
1840 if ((asect
->flags
& SEC_ALLOC
) != 0)
1841 this_hdr
->sh_flags
|= SHF_ALLOC
;
1842 if ((asect
->flags
& SEC_READONLY
) == 0)
1843 this_hdr
->sh_flags
|= SHF_WRITE
;
1844 if ((asect
->flags
& SEC_CODE
) != 0)
1845 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1846 if ((asect
->flags
& SEC_MERGE
) != 0)
1848 this_hdr
->sh_flags
|= SHF_MERGE
;
1849 this_hdr
->sh_entsize
= asect
->entsize
;
1850 if ((asect
->flags
& SEC_STRINGS
) != 0)
1851 this_hdr
->sh_flags
|= SHF_STRINGS
;
1854 /* Check for processor-specific section types. */
1855 if (bed
->elf_backend_fake_sections
)
1856 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1858 /* If the section has relocs, set up a section header for the
1859 SHT_REL[A] section. If two relocation sections are required for
1860 this section, it is up to the processor-specific back-end to
1861 create the other. */
1862 if ((asect
->flags
& SEC_RELOC
) != 0
1863 && !_bfd_elf_init_reloc_shdr (abfd
,
1864 &elf_section_data (asect
)->rel_hdr
,
1866 elf_section_data (asect
)->use_rela_p
))
1870 /* Assign all ELF section numbers. The dummy first section is handled here
1871 too. The link/info pointers for the standard section types are filled
1872 in here too, while we're at it. */
1875 assign_section_numbers (abfd
)
1878 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1880 unsigned int section_number
;
1881 Elf_Internal_Shdr
**i_shdrp
;
1885 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1887 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1889 d
->this_idx
= section_number
++;
1890 if ((sec
->flags
& SEC_RELOC
) == 0)
1893 d
->rel_idx
= section_number
++;
1896 d
->rel_idx2
= section_number
++;
1901 t
->shstrtab_section
= section_number
++;
1902 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
1903 t
->shstrtab_hdr
.sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1905 if (bfd_get_symcount (abfd
) > 0)
1907 t
->symtab_section
= section_number
++;
1908 t
->strtab_section
= section_number
++;
1911 elf_elfheader (abfd
)->e_shnum
= section_number
;
1913 /* Set up the list of section header pointers, in agreement with the
1915 i_shdrp
= ((Elf_Internal_Shdr
**)
1916 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*)));
1917 if (i_shdrp
== NULL
)
1920 i_shdrp
[0] = ((Elf_Internal_Shdr
*)
1921 bfd_alloc (abfd
, sizeof (Elf_Internal_Shdr
)));
1922 if (i_shdrp
[0] == NULL
)
1924 bfd_release (abfd
, i_shdrp
);
1927 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
1929 elf_elfsections (abfd
) = i_shdrp
;
1931 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1932 if (bfd_get_symcount (abfd
) > 0)
1934 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1935 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1936 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1938 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1940 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1944 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1945 if (d
->rel_idx
!= 0)
1946 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1947 if (d
->rel_idx2
!= 0)
1948 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
1950 /* Fill in the sh_link and sh_info fields while we're at it. */
1952 /* sh_link of a reloc section is the section index of the symbol
1953 table. sh_info is the section index of the section to which
1954 the relocation entries apply. */
1955 if (d
->rel_idx
!= 0)
1957 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1958 d
->rel_hdr
.sh_info
= d
->this_idx
;
1960 if (d
->rel_idx2
!= 0)
1962 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
1963 d
->rel_hdr2
->sh_info
= d
->this_idx
;
1966 switch (d
->this_hdr
.sh_type
)
1970 /* A reloc section which we are treating as a normal BFD
1971 section. sh_link is the section index of the symbol
1972 table. sh_info is the section index of the section to
1973 which the relocation entries apply. We assume that an
1974 allocated reloc section uses the dynamic symbol table.
1975 FIXME: How can we be sure? */
1976 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1978 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1980 /* We look up the section the relocs apply to by name. */
1982 if (d
->this_hdr
.sh_type
== SHT_REL
)
1986 s
= bfd_get_section_by_name (abfd
, name
);
1988 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
1992 /* We assume that a section named .stab*str is a stabs
1993 string section. We look for a section with the same name
1994 but without the trailing ``str'', and set its sh_link
1995 field to point to this section. */
1996 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
1997 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2002 len
= strlen (sec
->name
);
2003 alc
= (char *) bfd_malloc (len
- 2);
2006 strncpy (alc
, sec
->name
, len
- 3);
2007 alc
[len
- 3] = '\0';
2008 s
= bfd_get_section_by_name (abfd
, alc
);
2012 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2014 /* This is a .stab section. */
2015 elf_section_data (s
)->this_hdr
.sh_entsize
=
2016 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2023 case SHT_GNU_verneed
:
2024 case SHT_GNU_verdef
:
2025 /* sh_link is the section header index of the string table
2026 used for the dynamic entries, or the symbol table, or the
2028 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2030 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2034 case SHT_GNU_versym
:
2035 /* sh_link is the section header index of the symbol table
2036 this hash table or version table is for. */
2037 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2039 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2047 /* Map symbol from it's internal number to the external number, moving
2048 all local symbols to be at the head of the list. */
2051 sym_is_global (abfd
, sym
)
2055 /* If the backend has a special mapping, use it. */
2056 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2057 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2060 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2061 || bfd_is_und_section (bfd_get_section (sym
))
2062 || bfd_is_com_section (bfd_get_section (sym
)));
2066 elf_map_symbols (abfd
)
2069 int symcount
= bfd_get_symcount (abfd
);
2070 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2071 asymbol
**sect_syms
;
2073 int num_globals
= 0;
2074 int num_locals2
= 0;
2075 int num_globals2
= 0;
2077 int num_sections
= 0;
2084 fprintf (stderr
, "elf_map_symbols\n");
2088 /* Add a section symbol for each BFD section. FIXME: Is this really
2090 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2092 if (max_index
< asect
->index
)
2093 max_index
= asect
->index
;
2097 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
2098 if (sect_syms
== NULL
)
2100 elf_section_syms (abfd
) = sect_syms
;
2101 elf_num_section_syms (abfd
) = max_index
;
2103 for (idx
= 0; idx
< symcount
; idx
++)
2107 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2114 if (sec
->owner
!= NULL
)
2116 if (sec
->owner
!= abfd
)
2118 if (sec
->output_offset
!= 0)
2121 sec
= sec
->output_section
;
2123 /* Empty sections in the input files may have had a section
2124 symbol created for them. (See the comment near the end of
2125 _bfd_generic_link_output_symbols in linker.c). If the linker
2126 script discards such sections then we will reach this point.
2127 Since we know that we cannot avoid this case, we detect it
2128 and skip the abort and the assignment to the sect_syms array.
2129 To reproduce this particular case try running the linker
2130 testsuite test ld-scripts/weak.exp for an ELF port that uses
2131 the generic linker. */
2132 if (sec
->owner
== NULL
)
2135 BFD_ASSERT (sec
->owner
== abfd
);
2137 sect_syms
[sec
->index
] = syms
[idx
];
2142 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2144 if (sect_syms
[asect
->index
] != NULL
)
2147 sym
= bfd_make_empty_symbol (abfd
);
2150 sym
->the_bfd
= abfd
;
2151 sym
->name
= asect
->name
;
2153 /* Set the flags to 0 to indicate that this one was newly added. */
2155 sym
->section
= asect
;
2156 sect_syms
[asect
->index
] = sym
;
2160 _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
2161 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
2165 /* Classify all of the symbols. */
2166 for (idx
= 0; idx
< symcount
; idx
++)
2168 if (!sym_is_global (abfd
, syms
[idx
]))
2173 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2175 if (sect_syms
[asect
->index
] != NULL
2176 && sect_syms
[asect
->index
]->flags
== 0)
2178 sect_syms
[asect
->index
]->flags
= BSF_SECTION_SYM
;
2179 if (!sym_is_global (abfd
, sect_syms
[asect
->index
]))
2183 sect_syms
[asect
->index
]->flags
= 0;
2187 /* Now sort the symbols so the local symbols are first. */
2188 new_syms
= ((asymbol
**)
2190 (num_locals
+ num_globals
) * sizeof (asymbol
*)));
2191 if (new_syms
== NULL
)
2194 for (idx
= 0; idx
< symcount
; idx
++)
2196 asymbol
*sym
= syms
[idx
];
2199 if (!sym_is_global (abfd
, sym
))
2202 i
= num_locals
+ num_globals2
++;
2204 sym
->udata
.i
= i
+ 1;
2206 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2208 if (sect_syms
[asect
->index
] != NULL
2209 && sect_syms
[asect
->index
]->flags
== 0)
2211 asymbol
*sym
= sect_syms
[asect
->index
];
2214 sym
->flags
= BSF_SECTION_SYM
;
2215 if (!sym_is_global (abfd
, sym
))
2218 i
= num_locals
+ num_globals2
++;
2220 sym
->udata
.i
= i
+ 1;
2224 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2226 elf_num_locals (abfd
) = num_locals
;
2227 elf_num_globals (abfd
) = num_globals
;
2231 /* Align to the maximum file alignment that could be required for any
2232 ELF data structure. */
2234 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2235 static INLINE file_ptr
2236 align_file_position (off
, align
)
2240 return (off
+ align
- 1) & ~(align
- 1);
2243 /* Assign a file position to a section, optionally aligning to the
2244 required section alignment. */
2247 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2248 Elf_Internal_Shdr
*i_shdrp
;
2256 al
= i_shdrp
->sh_addralign
;
2258 offset
= BFD_ALIGN (offset
, al
);
2260 i_shdrp
->sh_offset
= offset
;
2261 if (i_shdrp
->bfd_section
!= NULL
)
2262 i_shdrp
->bfd_section
->filepos
= offset
;
2263 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2264 offset
+= i_shdrp
->sh_size
;
2268 /* Compute the file positions we are going to put the sections at, and
2269 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2270 is not NULL, this is being called by the ELF backend linker. */
2273 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2275 struct bfd_link_info
*link_info
;
2277 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2279 struct bfd_strtab_hash
*strtab
;
2280 Elf_Internal_Shdr
*shstrtab_hdr
;
2282 if (abfd
->output_has_begun
)
2285 /* Do any elf backend specific processing first. */
2286 if (bed
->elf_backend_begin_write_processing
)
2287 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2289 if (! prep_headers (abfd
))
2292 /* Post process the headers if necessary. */
2293 if (bed
->elf_backend_post_process_headers
)
2294 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2297 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2301 if (!assign_section_numbers (abfd
))
2304 /* The backend linker builds symbol table information itself. */
2305 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2307 /* Non-zero if doing a relocatable link. */
2308 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2310 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2314 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2315 /* sh_name was set in prep_headers. */
2316 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2317 shstrtab_hdr
->sh_flags
= 0;
2318 shstrtab_hdr
->sh_addr
= 0;
2319 shstrtab_hdr
->sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
2320 shstrtab_hdr
->sh_entsize
= 0;
2321 shstrtab_hdr
->sh_link
= 0;
2322 shstrtab_hdr
->sh_info
= 0;
2323 /* sh_offset is set in assign_file_positions_except_relocs. */
2324 shstrtab_hdr
->sh_addralign
= 1;
2326 if (!assign_file_positions_except_relocs (abfd
))
2329 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2332 Elf_Internal_Shdr
*hdr
;
2334 off
= elf_tdata (abfd
)->next_file_pos
;
2336 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2337 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2339 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2340 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2342 elf_tdata (abfd
)->next_file_pos
= off
;
2344 /* Now that we know where the .strtab section goes, write it
2346 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
2347 || ! _bfd_stringtab_emit (abfd
, strtab
))
2349 _bfd_stringtab_free (strtab
);
2352 abfd
->output_has_begun
= true;
2357 /* Create a mapping from a set of sections to a program segment. */
2359 static INLINE
struct elf_segment_map
*
2360 make_mapping (abfd
, sections
, from
, to
, phdr
)
2362 asection
**sections
;
2367 struct elf_segment_map
*m
;
2371 m
= ((struct elf_segment_map
*)
2373 (sizeof (struct elf_segment_map
)
2374 + (to
- from
- 1) * sizeof (asection
*))));
2378 m
->p_type
= PT_LOAD
;
2379 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
2380 m
->sections
[i
- from
] = *hdrpp
;
2381 m
->count
= to
- from
;
2383 if (from
== 0 && phdr
)
2385 /* Include the headers in the first PT_LOAD segment. */
2386 m
->includes_filehdr
= 1;
2387 m
->includes_phdrs
= 1;
2393 /* Set up a mapping from BFD sections to program segments. */
2396 map_sections_to_segments (abfd
)
2399 asection
**sections
= NULL
;
2403 struct elf_segment_map
*mfirst
;
2404 struct elf_segment_map
**pm
;
2405 struct elf_segment_map
*m
;
2407 unsigned int phdr_index
;
2408 bfd_vma maxpagesize
;
2410 boolean phdr_in_segment
= true;
2414 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2417 if (bfd_count_sections (abfd
) == 0)
2420 /* Select the allocated sections, and sort them. */
2422 sections
= (asection
**) bfd_malloc (bfd_count_sections (abfd
)
2423 * sizeof (asection
*));
2424 if (sections
== NULL
)
2428 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2430 if ((s
->flags
& SEC_ALLOC
) != 0)
2436 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
2439 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
2441 /* Build the mapping. */
2446 /* If we have a .interp section, then create a PT_PHDR segment for
2447 the program headers and a PT_INTERP segment for the .interp
2449 s
= bfd_get_section_by_name (abfd
, ".interp");
2450 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2452 m
= ((struct elf_segment_map
*)
2453 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2457 m
->p_type
= PT_PHDR
;
2458 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2459 m
->p_flags
= PF_R
| PF_X
;
2460 m
->p_flags_valid
= 1;
2461 m
->includes_phdrs
= 1;
2466 m
= ((struct elf_segment_map
*)
2467 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2471 m
->p_type
= PT_INTERP
;
2479 /* Look through the sections. We put sections in the same program
2480 segment when the start of the second section can be placed within
2481 a few bytes of the end of the first section. */
2484 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2486 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
2488 && (dynsec
->flags
& SEC_LOAD
) == 0)
2491 /* Deal with -Ttext or something similar such that the first section
2492 is not adjacent to the program headers. This is an
2493 approximation, since at this point we don't know exactly how many
2494 program headers we will need. */
2497 bfd_size_type phdr_size
;
2499 phdr_size
= elf_tdata (abfd
)->program_header_size
;
2501 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
2502 if ((abfd
->flags
& D_PAGED
) == 0
2503 || sections
[0]->lma
< phdr_size
2504 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
2505 phdr_in_segment
= false;
2508 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
2511 boolean new_segment
;
2515 /* See if this section and the last one will fit in the same
2518 if (last_hdr
== NULL
)
2520 /* If we don't have a segment yet, then we don't need a new
2521 one (we build the last one after this loop). */
2522 new_segment
= false;
2524 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
2526 /* If this section has a different relation between the
2527 virtual address and the load address, then we need a new
2531 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2532 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
2534 /* If putting this section in this segment would force us to
2535 skip a page in the segment, then we need a new segment. */
2538 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
2539 && (hdr
->flags
& SEC_LOAD
) != 0)
2541 /* We don't want to put a loadable section after a
2542 nonloadable section in the same segment. */
2545 else if ((abfd
->flags
& D_PAGED
) == 0)
2547 /* If the file is not demand paged, which means that we
2548 don't require the sections to be correctly aligned in the
2549 file, then there is no other reason for a new segment. */
2550 new_segment
= false;
2553 && (hdr
->flags
& SEC_READONLY
) == 0
2554 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2557 /* We don't want to put a writable section in a read only
2558 segment, unless they are on the same page in memory
2559 anyhow. We already know that the last section does not
2560 bring us past the current section on the page, so the
2561 only case in which the new section is not on the same
2562 page as the previous section is when the previous section
2563 ends precisely on a page boundary. */
2568 /* Otherwise, we can use the same segment. */
2569 new_segment
= false;
2574 if ((hdr
->flags
& SEC_READONLY
) == 0)
2580 /* We need a new program segment. We must create a new program
2581 header holding all the sections from phdr_index until hdr. */
2583 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2590 if ((hdr
->flags
& SEC_READONLY
) == 0)
2597 phdr_in_segment
= false;
2600 /* Create a final PT_LOAD program segment. */
2601 if (last_hdr
!= NULL
)
2603 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2611 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2614 m
= ((struct elf_segment_map
*)
2615 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2619 m
->p_type
= PT_DYNAMIC
;
2621 m
->sections
[0] = dynsec
;
2627 /* For each loadable .note section, add a PT_NOTE segment. We don't
2628 use bfd_get_section_by_name, because if we link together
2629 nonloadable .note sections and loadable .note sections, we will
2630 generate two .note sections in the output file. FIXME: Using
2631 names for section types is bogus anyhow. */
2632 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2634 if ((s
->flags
& SEC_LOAD
) != 0
2635 && strncmp (s
->name
, ".note", 5) == 0)
2637 m
= ((struct elf_segment_map
*)
2638 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2642 m
->p_type
= PT_NOTE
;
2654 elf_tdata (abfd
)->segment_map
= mfirst
;
2658 if (sections
!= NULL
)
2663 /* Sort sections by address. */
2666 elf_sort_sections (arg1
, arg2
)
2670 const asection
*sec1
= *(const asection
**) arg1
;
2671 const asection
*sec2
= *(const asection
**) arg2
;
2673 /* Sort by LMA first, since this is the address used to
2674 place the section into a segment. */
2675 if (sec1
->lma
< sec2
->lma
)
2677 else if (sec1
->lma
> sec2
->lma
)
2680 /* Then sort by VMA. Normally the LMA and the VMA will be
2681 the same, and this will do nothing. */
2682 if (sec1
->vma
< sec2
->vma
)
2684 else if (sec1
->vma
> sec2
->vma
)
2687 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2689 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2695 /* If the indicies are the same, do not return 0
2696 here, but continue to try the next comparison. */
2697 if (sec1
->target_index
- sec2
->target_index
!= 0)
2698 return sec1
->target_index
- sec2
->target_index
;
2703 else if (TOEND (sec2
))
2708 /* Sort by size, to put zero sized sections
2709 before others at the same address. */
2711 if (sec1
->_raw_size
< sec2
->_raw_size
)
2713 if (sec1
->_raw_size
> sec2
->_raw_size
)
2716 return sec1
->target_index
- sec2
->target_index
;
2719 /* Assign file positions to the sections based on the mapping from
2720 sections to segments. This function also sets up some fields in
2721 the file header, and writes out the program headers. */
2724 assign_file_positions_for_segments (abfd
)
2727 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2729 struct elf_segment_map
*m
;
2731 Elf_Internal_Phdr
*phdrs
;
2733 bfd_vma filehdr_vaddr
, filehdr_paddr
;
2734 bfd_vma phdrs_vaddr
, phdrs_paddr
;
2735 Elf_Internal_Phdr
*p
;
2737 if (elf_tdata (abfd
)->segment_map
== NULL
)
2739 if (! map_sections_to_segments (abfd
))
2743 if (bed
->elf_backend_modify_segment_map
)
2745 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
2750 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2753 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
2754 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
2755 elf_elfheader (abfd
)->e_phnum
= count
;
2760 /* If we already counted the number of program segments, make sure
2761 that we allocated enough space. This happens when SIZEOF_HEADERS
2762 is used in a linker script. */
2763 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
2764 if (alloc
!= 0 && count
> alloc
)
2766 ((*_bfd_error_handler
)
2767 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
2768 bfd_get_filename (abfd
), alloc
, count
));
2769 bfd_set_error (bfd_error_bad_value
);
2776 phdrs
= ((Elf_Internal_Phdr
*)
2777 bfd_alloc (abfd
, alloc
* sizeof (Elf_Internal_Phdr
)));
2781 off
= bed
->s
->sizeof_ehdr
;
2782 off
+= alloc
* bed
->s
->sizeof_phdr
;
2789 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2796 /* If elf_segment_map is not from map_sections_to_segments, the
2797 sections may not be correctly ordered. */
2799 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
2802 p
->p_type
= m
->p_type
;
2803 p
->p_flags
= m
->p_flags
;
2805 if (p
->p_type
== PT_LOAD
2807 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
2809 if ((abfd
->flags
& D_PAGED
) != 0)
2810 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
2813 bfd_size_type align
;
2816 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2818 bfd_size_type secalign
;
2820 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
2821 if (secalign
> align
)
2825 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
2832 p
->p_vaddr
= m
->sections
[0]->vma
;
2834 if (m
->p_paddr_valid
)
2835 p
->p_paddr
= m
->p_paddr
;
2836 else if (m
->count
== 0)
2839 p
->p_paddr
= m
->sections
[0]->lma
;
2841 if (p
->p_type
== PT_LOAD
2842 && (abfd
->flags
& D_PAGED
) != 0)
2843 p
->p_align
= bed
->maxpagesize
;
2844 else if (m
->count
== 0)
2845 p
->p_align
= bed
->s
->file_align
;
2853 if (m
->includes_filehdr
)
2855 if (! m
->p_flags_valid
)
2858 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
2859 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
2862 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2864 if (p
->p_vaddr
< (bfd_vma
) off
)
2866 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
2867 bfd_get_filename (abfd
));
2868 bfd_set_error (bfd_error_bad_value
);
2873 if (! m
->p_paddr_valid
)
2876 if (p
->p_type
== PT_LOAD
)
2878 filehdr_vaddr
= p
->p_vaddr
;
2879 filehdr_paddr
= p
->p_paddr
;
2883 if (m
->includes_phdrs
)
2885 if (! m
->p_flags_valid
)
2888 if (m
->includes_filehdr
)
2890 if (p
->p_type
== PT_LOAD
)
2892 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
2893 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
2898 p
->p_offset
= bed
->s
->sizeof_ehdr
;
2902 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2903 p
->p_vaddr
-= off
- p
->p_offset
;
2904 if (! m
->p_paddr_valid
)
2905 p
->p_paddr
-= off
- p
->p_offset
;
2908 if (p
->p_type
== PT_LOAD
)
2910 phdrs_vaddr
= p
->p_vaddr
;
2911 phdrs_paddr
= p
->p_paddr
;
2914 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
2917 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
2918 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
2921 if (p
->p_type
== PT_LOAD
2922 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
2924 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
2930 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
2931 p
->p_filesz
+= adjust
;
2932 p
->p_memsz
+= adjust
;
2938 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2942 bfd_size_type align
;
2946 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
2948 /* The section may have artificial alignment forced by a
2949 link script. Notice this case by the gap between the
2950 cumulative phdr vma and the section's vma. */
2951 if (p
->p_vaddr
+ p
->p_memsz
< sec
->vma
)
2953 bfd_vma adjust
= sec
->vma
- (p
->p_vaddr
+ p
->p_memsz
);
2955 p
->p_memsz
+= adjust
;
2958 if ((flags
& SEC_LOAD
) != 0)
2959 p
->p_filesz
+= adjust
;
2962 if (p
->p_type
== PT_LOAD
)
2964 bfd_signed_vma adjust
;
2966 if ((flags
& SEC_LOAD
) != 0)
2968 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
2972 else if ((flags
& SEC_ALLOC
) != 0)
2974 /* The section VMA must equal the file position
2975 modulo the page size. FIXME: I'm not sure if
2976 this adjustment is really necessary. We used to
2977 not have the SEC_LOAD case just above, and then
2978 this was necessary, but now I'm not sure. */
2979 if ((abfd
->flags
& D_PAGED
) != 0)
2980 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
2982 adjust
= (sec
->vma
- voff
) % align
;
2991 (* _bfd_error_handler
)
2992 (_("Error: First section in segment (%s) starts at 0x%x"),
2993 bfd_section_name (abfd
, sec
), sec
->lma
);
2994 (* _bfd_error_handler
)
2995 (_(" whereas segment starts at 0x%x"),
3000 p
->p_memsz
+= adjust
;
3003 if ((flags
& SEC_LOAD
) != 0)
3004 p
->p_filesz
+= adjust
;
3009 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3010 used in a linker script we may have a section with
3011 SEC_LOAD clear but which is supposed to have
3013 if ((flags
& SEC_LOAD
) != 0
3014 || (flags
& SEC_HAS_CONTENTS
) != 0)
3015 off
+= sec
->_raw_size
;
3017 if ((flags
& SEC_ALLOC
) != 0)
3018 voff
+= sec
->_raw_size
;
3021 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3023 /* The actual "note" segment has i == 0.
3024 This is the one that actually contains everything. */
3028 p
->p_filesz
= sec
->_raw_size
;
3029 off
+= sec
->_raw_size
;
3034 /* Fake sections -- don't need to be written. */
3037 flags
= sec
->flags
= 0;
3044 p
->p_memsz
+= sec
->_raw_size
;
3046 if ((flags
& SEC_LOAD
) != 0)
3047 p
->p_filesz
+= sec
->_raw_size
;
3049 if (align
> p
->p_align
3050 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3054 if (! m
->p_flags_valid
)
3057 if ((flags
& SEC_CODE
) != 0)
3059 if ((flags
& SEC_READONLY
) == 0)
3065 /* Now that we have set the section file positions, we can set up
3066 the file positions for the non PT_LOAD segments. */
3067 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3071 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3073 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3074 p
->p_offset
= m
->sections
[0]->filepos
;
3078 if (m
->includes_filehdr
)
3080 p
->p_vaddr
= filehdr_vaddr
;
3081 if (! m
->p_paddr_valid
)
3082 p
->p_paddr
= filehdr_paddr
;
3084 else if (m
->includes_phdrs
)
3086 p
->p_vaddr
= phdrs_vaddr
;
3087 if (! m
->p_paddr_valid
)
3088 p
->p_paddr
= phdrs_paddr
;
3093 /* Clear out any program headers we allocated but did not use. */
3094 for (; count
< alloc
; count
++, p
++)
3096 memset (p
, 0, sizeof *p
);
3097 p
->p_type
= PT_NULL
;
3100 elf_tdata (abfd
)->phdr
= phdrs
;
3102 elf_tdata (abfd
)->next_file_pos
= off
;
3104 /* Write out the program headers. */
3105 if (bfd_seek (abfd
, bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3106 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3112 /* Get the size of the program header.
3114 If this is called by the linker before any of the section VMA's are set, it
3115 can't calculate the correct value for a strange memory layout. This only
3116 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3117 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3118 data segment (exclusive of .interp and .dynamic).
3120 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3121 will be two segments. */
3123 static bfd_size_type
3124 get_program_header_size (abfd
)
3129 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3131 /* We can't return a different result each time we're called. */
3132 if (elf_tdata (abfd
)->program_header_size
!= 0)
3133 return elf_tdata (abfd
)->program_header_size
;
3135 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3137 struct elf_segment_map
*m
;
3140 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3142 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3143 return elf_tdata (abfd
)->program_header_size
;
3146 /* Assume we will need exactly two PT_LOAD segments: one for text
3147 and one for data. */
3150 s
= bfd_get_section_by_name (abfd
, ".interp");
3151 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3153 /* If we have a loadable interpreter section, we need a
3154 PT_INTERP segment. In this case, assume we also need a
3155 PT_PHDR segment, although that may not be true for all
3160 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3162 /* We need a PT_DYNAMIC segment. */
3166 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3168 if ((s
->flags
& SEC_LOAD
) != 0
3169 && strncmp (s
->name
, ".note", 5) == 0)
3171 /* We need a PT_NOTE segment. */
3176 /* Let the backend count up any program headers it might need. */
3177 if (bed
->elf_backend_additional_program_headers
)
3181 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3187 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3188 return elf_tdata (abfd
)->program_header_size
;
3191 /* Work out the file positions of all the sections. This is called by
3192 _bfd_elf_compute_section_file_positions. All the section sizes and
3193 VMAs must be known before this is called.
3195 We do not consider reloc sections at this point, unless they form
3196 part of the loadable image. Reloc sections are assigned file
3197 positions in assign_file_positions_for_relocs, which is called by
3198 write_object_contents and final_link.
3200 We also don't set the positions of the .symtab and .strtab here. */
3203 assign_file_positions_except_relocs (abfd
)
3206 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
3207 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
3208 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
3210 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3212 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
3213 && bfd_get_format (abfd
) != bfd_core
)
3215 Elf_Internal_Shdr
**hdrpp
;
3218 /* Start after the ELF header. */
3219 off
= i_ehdrp
->e_ehsize
;
3221 /* We are not creating an executable, which means that we are
3222 not creating a program header, and that the actual order of
3223 the sections in the file is unimportant. */
3224 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3226 Elf_Internal_Shdr
*hdr
;
3229 if (hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
3231 hdr
->sh_offset
= -1;
3234 if (i
== tdata
->symtab_section
3235 || i
== tdata
->strtab_section
)
3237 hdr
->sh_offset
= -1;
3241 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3247 Elf_Internal_Shdr
**hdrpp
;
3249 /* Assign file positions for the loaded sections based on the
3250 assignment of sections to segments. */
3251 if (! assign_file_positions_for_segments (abfd
))
3254 /* Assign file positions for the other sections. */
3256 off
= elf_tdata (abfd
)->next_file_pos
;
3257 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3259 Elf_Internal_Shdr
*hdr
;
3262 if (hdr
->bfd_section
!= NULL
3263 && hdr
->bfd_section
->filepos
!= 0)
3264 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
3265 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
3267 ((*_bfd_error_handler
)
3268 (_("%s: warning: allocated section `%s' not in segment"),
3269 bfd_get_filename (abfd
),
3270 (hdr
->bfd_section
== NULL
3272 : hdr
->bfd_section
->name
)));
3273 if ((abfd
->flags
& D_PAGED
) != 0)
3274 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
3276 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
3277 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
3280 else if (hdr
->sh_type
== SHT_REL
3281 || hdr
->sh_type
== SHT_RELA
3282 || hdr
== i_shdrpp
[tdata
->symtab_section
]
3283 || hdr
== i_shdrpp
[tdata
->strtab_section
])
3284 hdr
->sh_offset
= -1;
3286 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3290 /* Place the section headers. */
3291 off
= align_file_position (off
, bed
->s
->file_align
);
3292 i_ehdrp
->e_shoff
= off
;
3293 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
3295 elf_tdata (abfd
)->next_file_pos
= off
;
3304 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3305 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
3306 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
3308 struct bfd_strtab_hash
*shstrtab
;
3309 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3311 i_ehdrp
= elf_elfheader (abfd
);
3312 i_shdrp
= elf_elfsections (abfd
);
3314 shstrtab
= _bfd_elf_stringtab_init ();
3315 if (shstrtab
== NULL
)
3318 elf_shstrtab (abfd
) = shstrtab
;
3320 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
3321 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
3322 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
3323 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
3325 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
3326 i_ehdrp
->e_ident
[EI_DATA
] =
3327 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
3328 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
3330 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_NONE
;
3331 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 0;
3333 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
3334 i_ehdrp
->e_ident
[count
] = 0;
3336 if ((abfd
->flags
& DYNAMIC
) != 0)
3337 i_ehdrp
->e_type
= ET_DYN
;
3338 else if ((abfd
->flags
& EXEC_P
) != 0)
3339 i_ehdrp
->e_type
= ET_EXEC
;
3340 else if (bfd_get_format (abfd
) == bfd_core
)
3341 i_ehdrp
->e_type
= ET_CORE
;
3343 i_ehdrp
->e_type
= ET_REL
;
3345 switch (bfd_get_arch (abfd
))
3347 case bfd_arch_unknown
:
3348 i_ehdrp
->e_machine
= EM_NONE
;
3350 case bfd_arch_sparc
:
3351 if (bfd_get_arch_size (abfd
) == 64)
3352 i_ehdrp
->e_machine
= EM_SPARCV9
;
3354 i_ehdrp
->e_machine
= EM_SPARC
;
3357 i_ehdrp
->e_machine
= EM_S370
;
3360 if (bfd_get_arch_size (abfd
) == 64)
3361 i_ehdrp
->e_machine
= EM_X86_64
;
3363 i_ehdrp
->e_machine
= EM_386
;
3366 i_ehdrp
->e_machine
= EM_IA_64
;
3368 case bfd_arch_m68hc11
:
3369 i_ehdrp
->e_machine
= EM_68HC11
;
3371 case bfd_arch_m68hc12
:
3372 i_ehdrp
->e_machine
= EM_68HC12
;
3375 i_ehdrp
->e_machine
= EM_S390
;
3378 i_ehdrp
->e_machine
= EM_68K
;
3381 i_ehdrp
->e_machine
= EM_88K
;
3384 i_ehdrp
->e_machine
= EM_860
;
3387 i_ehdrp
->e_machine
= EM_960
;
3389 case bfd_arch_mips
: /* MIPS Rxxxx */
3390 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
3393 i_ehdrp
->e_machine
= EM_PARISC
;
3395 case bfd_arch_powerpc
:
3396 if (bed
->s
->arch_size
== 64)
3397 i_ehdrp
->e_machine
= EM_PPC64
;
3399 i_ehdrp
->e_machine
= EM_PPC
;
3401 case bfd_arch_alpha
:
3402 i_ehdrp
->e_machine
= EM_ALPHA
;
3405 i_ehdrp
->e_machine
= EM_SH
;
3408 i_ehdrp
->e_machine
= EM_CYGNUS_D10V
;
3411 i_ehdrp
->e_machine
= EM_CYGNUS_D30V
;
3414 i_ehdrp
->e_machine
= EM_CYGNUS_FR30
;
3416 case bfd_arch_mcore
:
3417 i_ehdrp
->e_machine
= EM_MCORE
;
3420 i_ehdrp
->e_machine
= EM_AVR
;
3423 switch (bfd_get_mach (abfd
))
3426 case 0: i_ehdrp
->e_machine
= EM_CYGNUS_V850
; break;
3430 i_ehdrp
->e_machine
= EM_CYGNUS_ARC
;
3433 i_ehdrp
->e_machine
= EM_ARM
;
3436 i_ehdrp
->e_machine
= EM_CYGNUS_M32R
;
3438 case bfd_arch_mn10200
:
3439 i_ehdrp
->e_machine
= EM_CYGNUS_MN10200
;
3441 case bfd_arch_mn10300
:
3442 i_ehdrp
->e_machine
= EM_CYGNUS_MN10300
;
3445 i_ehdrp
->e_machine
= EM_PJ
;
3448 i_ehdrp
->e_machine
= EM_CRIS
;
3450 case bfd_arch_openrisc
:
3451 i_ehdrp
->e_machine
= EM_OPENRISC
;
3453 /* Also note that EM_M32, AT&T WE32100 is unknown to bfd. */
3454 case bfd_arch_h8300
:
3455 i_ehdrp
->e_machine
= EM_H8_300
;
3457 case bfd_arch_h8500
:
3458 i_ehdrp
->e_machine
= EM_H8_500
;
3461 i_ehdrp
->e_machine
= EM_NONE
;
3463 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3464 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3466 /* No program header, for now. */
3467 i_ehdrp
->e_phoff
= 0;
3468 i_ehdrp
->e_phentsize
= 0;
3469 i_ehdrp
->e_phnum
= 0;
3471 /* Each bfd section is section header entry. */
3472 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3473 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3475 /* If we're building an executable, we'll need a program header table. */
3476 if (abfd
->flags
& EXEC_P
)
3478 /* It all happens later. */
3480 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3482 /* elf_build_phdrs() returns a (NULL-terminated) array of
3483 Elf_Internal_Phdrs. */
3484 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3485 i_ehdrp
->e_phoff
= outbase
;
3486 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3491 i_ehdrp
->e_phentsize
= 0;
3493 i_ehdrp
->e_phoff
= 0;
3496 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3497 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3498 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3499 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3500 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3501 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3502 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3503 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3504 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3510 /* Assign file positions for all the reloc sections which are not part
3511 of the loadable file image. */
3514 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3519 Elf_Internal_Shdr
**shdrpp
;
3521 off
= elf_tdata (abfd
)->next_file_pos
;
3523 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3524 i
< elf_elfheader (abfd
)->e_shnum
;
3527 Elf_Internal_Shdr
*shdrp
;
3530 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3531 && shdrp
->sh_offset
== -1)
3532 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3535 elf_tdata (abfd
)->next_file_pos
= off
;
3539 _bfd_elf_write_object_contents (abfd
)
3542 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3543 Elf_Internal_Ehdr
*i_ehdrp
;
3544 Elf_Internal_Shdr
**i_shdrp
;
3548 if (! abfd
->output_has_begun
3549 && ! _bfd_elf_compute_section_file_positions
3550 (abfd
, (struct bfd_link_info
*) NULL
))
3553 i_shdrp
= elf_elfsections (abfd
);
3554 i_ehdrp
= elf_elfheader (abfd
);
3557 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3561 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3563 /* After writing the headers, we need to write the sections too... */
3564 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3566 if (bed
->elf_backend_section_processing
)
3567 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3568 if (i_shdrp
[count
]->contents
)
3570 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3571 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3573 != i_shdrp
[count
]->sh_size
))
3578 /* Write out the section header names. */
3579 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3580 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3583 if (bed
->elf_backend_final_write_processing
)
3584 (*bed
->elf_backend_final_write_processing
) (abfd
,
3585 elf_tdata (abfd
)->linker
);
3587 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3591 _bfd_elf_write_corefile_contents (abfd
)
3594 /* Hopefully this can be done just like an object file. */
3595 return _bfd_elf_write_object_contents (abfd
);
3598 /* Given a section, search the header to find them. */
3601 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3605 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3606 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3608 Elf_Internal_Shdr
*hdr
;
3609 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3611 for (index
= 0; index
< maxindex
; index
++)
3613 hdr
= i_shdrp
[index
];
3614 if (hdr
->bfd_section
== asect
)
3618 if (bed
->elf_backend_section_from_bfd_section
)
3620 for (index
= 0; index
< maxindex
; index
++)
3624 hdr
= i_shdrp
[index
];
3626 if ((*bed
->elf_backend_section_from_bfd_section
)
3627 (abfd
, hdr
, asect
, &retval
))
3632 if (bfd_is_abs_section (asect
))
3634 if (bfd_is_com_section (asect
))
3636 if (bfd_is_und_section (asect
))
3639 bfd_set_error (bfd_error_nonrepresentable_section
);
3644 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3648 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3650 asymbol
**asym_ptr_ptr
;
3652 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3654 flagword flags
= asym_ptr
->flags
;
3656 /* When gas creates relocations against local labels, it creates its
3657 own symbol for the section, but does put the symbol into the
3658 symbol chain, so udata is 0. When the linker is generating
3659 relocatable output, this section symbol may be for one of the
3660 input sections rather than the output section. */
3661 if (asym_ptr
->udata
.i
== 0
3662 && (flags
& BSF_SECTION_SYM
)
3663 && asym_ptr
->section
)
3667 if (asym_ptr
->section
->output_section
!= NULL
)
3668 indx
= asym_ptr
->section
->output_section
->index
;
3670 indx
= asym_ptr
->section
->index
;
3671 if (indx
< elf_num_section_syms (abfd
)
3672 && elf_section_syms (abfd
)[indx
] != NULL
)
3673 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3676 idx
= asym_ptr
->udata
.i
;
3680 /* This case can occur when using --strip-symbol on a symbol
3681 which is used in a relocation entry. */
3682 (*_bfd_error_handler
)
3683 (_("%s: symbol `%s' required but not present"),
3684 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3685 bfd_set_error (bfd_error_no_symbols
);
3692 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3693 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3694 elf_symbol_flags (flags
));
3702 /* Copy private BFD data. This copies any program header information. */
3705 copy_private_bfd_data (ibfd
, obfd
)
3709 Elf_Internal_Ehdr
* iehdr
;
3710 struct elf_segment_map
* map
;
3711 struct elf_segment_map
* map_first
;
3712 struct elf_segment_map
** pointer_to_map
;
3713 Elf_Internal_Phdr
* segment
;
3716 unsigned int num_segments
;
3717 boolean phdr_included
= false;
3718 bfd_vma maxpagesize
;
3719 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
3720 unsigned int phdr_adjust_num
= 0;
3722 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3723 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3726 if (elf_tdata (ibfd
)->phdr
== NULL
)
3729 iehdr
= elf_elfheader (ibfd
);
3732 pointer_to_map
= &map_first
;
3734 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3735 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3737 /* Returns the end address of the segment + 1. */
3738 #define SEGMENT_END(segment, start) \
3739 (start + (segment->p_memsz > segment->p_filesz \
3740 ? segment->p_memsz : segment->p_filesz))
3742 /* Returns true if the given section is contained within
3743 the given segment. VMA addresses are compared. */
3744 #define IS_CONTAINED_BY_VMA(section, segment) \
3745 (section->vma >= segment->p_vaddr \
3746 && (section->vma + section->_raw_size) \
3747 <= (SEGMENT_END (segment, segment->p_vaddr)))
3749 /* Returns true if the given section is contained within
3750 the given segment. LMA addresses are compared. */
3751 #define IS_CONTAINED_BY_LMA(section, segment, base) \
3752 (section->lma >= base \
3753 && (section->lma + section->_raw_size) \
3754 <= SEGMENT_END (segment, base))
3756 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3757 #define IS_COREFILE_NOTE(p, s) \
3758 (p->p_type == PT_NOTE \
3759 && bfd_get_format (ibfd) == bfd_core \
3760 && s->vma == 0 && s->lma == 0 \
3761 && (bfd_vma) s->filepos >= p->p_offset \
3762 && (bfd_vma) s->filepos + s->_raw_size \
3763 <= p->p_offset + p->p_filesz)
3765 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3766 linker, which generates a PT_INTERP section with p_vaddr and
3767 p_memsz set to 0. */
3768 #define IS_SOLARIS_PT_INTERP(p, s) \
3770 && p->p_filesz > 0 \
3771 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3772 && s->_raw_size > 0 \
3773 && (bfd_vma) s->filepos >= p->p_offset \
3774 && ((bfd_vma) s->filepos + s->_raw_size \
3775 <= p->p_offset + p->p_filesz))
3777 /* Decide if the given section should be included in the given segment.
3778 A section will be included if:
3779 1. It is within the address space of the segment,
3780 2. It is an allocated segment,
3781 3. There is an output section associated with it,
3782 4. The section has not already been allocated to a previous segment. */
3783 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
3784 ((((IS_CONTAINED_BY_VMA (section, segment) \
3785 || IS_SOLARIS_PT_INTERP (segment, section)) \
3786 && (section->flags & SEC_ALLOC) != 0) \
3787 || IS_COREFILE_NOTE (segment, section)) \
3788 && section->output_section != NULL \
3789 && section->segment_mark == false)
3791 /* Returns true iff seg1 starts after the end of seg2. */
3792 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
3793 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
3795 /* Returns true iff seg1 and seg2 overlap. */
3796 #define SEGMENT_OVERLAPS(seg1, seg2) \
3797 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
3799 /* Initialise the segment mark field. */
3800 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3801 section
->segment_mark
= false;
3803 /* Scan through the segments specified in the program header
3804 of the input BFD. For this first scan we look for overlaps
3805 in the loadable segments. These can be created by wierd
3806 parameters to objcopy. */
3807 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3812 Elf_Internal_Phdr
*segment2
;
3814 if (segment
->p_type
!= PT_LOAD
)
3817 /* Determine if this segment overlaps any previous segments. */
3818 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
3820 bfd_signed_vma extra_length
;
3822 if (segment2
->p_type
!= PT_LOAD
3823 || ! SEGMENT_OVERLAPS (segment
, segment2
))
3826 /* Merge the two segments together. */
3827 if (segment2
->p_vaddr
< segment
->p_vaddr
)
3829 /* Extend SEGMENT2 to include SEGMENT and then delete
3832 SEGMENT_END (segment
, segment
->p_vaddr
)
3833 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
3835 if (extra_length
> 0)
3837 segment2
->p_memsz
+= extra_length
;
3838 segment2
->p_filesz
+= extra_length
;
3841 segment
->p_type
= PT_NULL
;
3843 /* Since we have deleted P we must restart the outer loop. */
3845 segment
= elf_tdata (ibfd
)->phdr
;
3850 /* Extend SEGMENT to include SEGMENT2 and then delete
3853 SEGMENT_END (segment2
, segment2
->p_vaddr
)
3854 - SEGMENT_END (segment
, segment
->p_vaddr
);
3856 if (extra_length
> 0)
3858 segment
->p_memsz
+= extra_length
;
3859 segment
->p_filesz
+= extra_length
;
3862 segment2
->p_type
= PT_NULL
;
3867 /* The second scan attempts to assign sections to segments. */
3868 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3872 unsigned int section_count
;
3873 asection
** sections
;
3874 asection
* output_section
;
3876 bfd_vma matching_lma
;
3877 bfd_vma suggested_lma
;
3880 if (segment
->p_type
== PT_NULL
)
3883 /* Compute how many sections might be placed into this segment. */
3885 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3886 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3889 /* Allocate a segment map big enough to contain all of the
3890 sections we have selected. */
3891 map
= ((struct elf_segment_map
*)
3893 (sizeof (struct elf_segment_map
)
3894 + ((size_t) section_count
- 1) * sizeof (asection
*))));
3898 /* Initialise the fields of the segment map. Default to
3899 using the physical address of the segment in the input BFD. */
3901 map
->p_type
= segment
->p_type
;
3902 map
->p_flags
= segment
->p_flags
;
3903 map
->p_flags_valid
= 1;
3904 map
->p_paddr
= segment
->p_paddr
;
3905 map
->p_paddr_valid
= 1;
3907 /* Determine if this segment contains the ELF file header
3908 and if it contains the program headers themselves. */
3909 map
->includes_filehdr
= (segment
->p_offset
== 0
3910 && segment
->p_filesz
>= iehdr
->e_ehsize
);
3912 map
->includes_phdrs
= 0;
3914 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
3916 map
->includes_phdrs
=
3917 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3918 && (segment
->p_offset
+ segment
->p_filesz
3919 >= ((bfd_vma
) iehdr
->e_phoff
3920 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3922 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
3923 phdr_included
= true;
3926 if (section_count
== 0)
3928 /* Special segments, such as the PT_PHDR segment, may contain
3929 no sections, but ordinary, loadable segments should contain
3931 if (segment
->p_type
== PT_LOAD
)
3933 (_("%s: warning: Empty loadable segment detected\n"),
3934 bfd_get_filename (ibfd
));
3937 *pointer_to_map
= map
;
3938 pointer_to_map
= &map
->next
;
3943 /* Now scan the sections in the input BFD again and attempt
3944 to add their corresponding output sections to the segment map.
3945 The problem here is how to handle an output section which has
3946 been moved (ie had its LMA changed). There are four possibilities:
3948 1. None of the sections have been moved.
3949 In this case we can continue to use the segment LMA from the
3952 2. All of the sections have been moved by the same amount.
3953 In this case we can change the segment's LMA to match the LMA
3954 of the first section.
3956 3. Some of the sections have been moved, others have not.
3957 In this case those sections which have not been moved can be
3958 placed in the current segment which will have to have its size,
3959 and possibly its LMA changed, and a new segment or segments will
3960 have to be created to contain the other sections.
3962 4. The sections have been moved, but not be the same amount.
3963 In this case we can change the segment's LMA to match the LMA
3964 of the first section and we will have to create a new segment
3965 or segments to contain the other sections.
3967 In order to save time, we allocate an array to hold the section
3968 pointers that we are interested in. As these sections get assigned
3969 to a segment, they are removed from this array. */
3971 sections
= (asection
**) bfd_malloc
3972 (sizeof (asection
*) * section_count
);
3973 if (sections
== NULL
)
3976 /* Step One: Scan for segment vs section LMA conflicts.
3977 Also add the sections to the section array allocated above.
3978 Also add the sections to the current segment. In the common
3979 case, where the sections have not been moved, this means that
3980 we have completely filled the segment, and there is nothing
3986 for (j
= 0, section
= ibfd
->sections
;
3988 section
= section
->next
)
3990 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3992 output_section
= section
->output_section
;
3994 sections
[j
++] = section
;
3996 /* The Solaris native linker always sets p_paddr to 0.
3997 We try to catch that case here, and set it to the
3999 if (segment
->p_paddr
== 0
4000 && segment
->p_vaddr
!= 0
4002 && output_section
->lma
!= 0
4003 && (output_section
->vma
== (segment
->p_vaddr
4004 + (map
->includes_filehdr
4007 + (map
->includes_phdrs
4008 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4010 map
->p_paddr
= segment
->p_vaddr
;
4012 /* Match up the physical address of the segment with the
4013 LMA address of the output section. */
4014 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4015 || IS_COREFILE_NOTE (segment
, section
))
4017 if (matching_lma
== 0)
4018 matching_lma
= output_section
->lma
;
4020 /* We assume that if the section fits within the segment
4021 then it does not overlap any other section within that
4023 map
->sections
[isec
++] = output_section
;
4025 else if (suggested_lma
== 0)
4026 suggested_lma
= output_section
->lma
;
4030 BFD_ASSERT (j
== section_count
);
4032 /* Step Two: Adjust the physical address of the current segment,
4034 if (isec
== section_count
)
4036 /* All of the sections fitted within the segment as currently
4037 specified. This is the default case. Add the segment to
4038 the list of built segments and carry on to process the next
4039 program header in the input BFD. */
4040 map
->count
= section_count
;
4041 *pointer_to_map
= map
;
4042 pointer_to_map
= &map
->next
;
4049 if (matching_lma
!= 0)
4051 /* At least one section fits inside the current segment.
4052 Keep it, but modify its physical address to match the
4053 LMA of the first section that fitted. */
4054 map
->p_paddr
= matching_lma
;
4058 /* None of the sections fitted inside the current segment.
4059 Change the current segment's physical address to match
4060 the LMA of the first section. */
4061 map
->p_paddr
= suggested_lma
;
4064 /* Offset the segment physical address from the lma
4065 to allow for space taken up by elf headers. */
4066 if (map
->includes_filehdr
)
4067 map
->p_paddr
-= iehdr
->e_ehsize
;
4069 if (map
->includes_phdrs
)
4071 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4073 /* iehdr->e_phnum is just an estimate of the number
4074 of program headers that we will need. Make a note
4075 here of the number we used and the segment we chose
4076 to hold these headers, so that we can adjust the
4077 offset when we know the correct value. */
4078 phdr_adjust_num
= iehdr
->e_phnum
;
4079 phdr_adjust_seg
= map
;
4083 /* Step Three: Loop over the sections again, this time assigning
4084 those that fit to the current segment and remvoing them from the
4085 sections array; but making sure not to leave large gaps. Once all
4086 possible sections have been assigned to the current segment it is
4087 added to the list of built segments and if sections still remain
4088 to be assigned, a new segment is constructed before repeating
4096 /* Fill the current segment with sections that fit. */
4097 for (j
= 0; j
< section_count
; j
++)
4099 section
= sections
[j
];
4101 if (section
== NULL
)
4104 output_section
= section
->output_section
;
4106 BFD_ASSERT (output_section
!= NULL
);
4108 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4109 || IS_COREFILE_NOTE (segment
, section
))
4111 if (map
->count
== 0)
4113 /* If the first section in a segment does not start at
4114 the beginning of the segment, then something is
4116 if (output_section
->lma
!=
4118 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4119 + (map
->includes_phdrs
4120 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4126 asection
* prev_sec
;
4128 prev_sec
= map
->sections
[map
->count
- 1];
4130 /* If the gap between the end of the previous section
4131 and the start of this section is more than
4132 maxpagesize then we need to start a new segment. */
4133 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
4134 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4135 || ((prev_sec
->lma
+ prev_sec
->_raw_size
) > output_section
->lma
))
4137 if (suggested_lma
== 0)
4138 suggested_lma
= output_section
->lma
;
4144 map
->sections
[map
->count
++] = output_section
;
4147 section
->segment_mark
= true;
4149 else if (suggested_lma
== 0)
4150 suggested_lma
= output_section
->lma
;
4153 BFD_ASSERT (map
->count
> 0);
4155 /* Add the current segment to the list of built segments. */
4156 *pointer_to_map
= map
;
4157 pointer_to_map
= &map
->next
;
4159 if (isec
< section_count
)
4161 /* We still have not allocated all of the sections to
4162 segments. Create a new segment here, initialise it
4163 and carry on looping. */
4164 map
= ((struct elf_segment_map
*)
4166 (sizeof (struct elf_segment_map
)
4167 + ((size_t) section_count
- 1)
4168 * sizeof (asection
*))));
4172 /* Initialise the fields of the segment map. Set the physical
4173 physical address to the LMA of the first section that has
4174 not yet been assigned. */
4176 map
->p_type
= segment
->p_type
;
4177 map
->p_flags
= segment
->p_flags
;
4178 map
->p_flags_valid
= 1;
4179 map
->p_paddr
= suggested_lma
;
4180 map
->p_paddr_valid
= 1;
4181 map
->includes_filehdr
= 0;
4182 map
->includes_phdrs
= 0;
4185 while (isec
< section_count
);
4190 /* The Solaris linker creates program headers in which all the
4191 p_paddr fields are zero. When we try to objcopy or strip such a
4192 file, we get confused. Check for this case, and if we find it
4193 reset the p_paddr_valid fields. */
4194 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4195 if (map
->p_paddr
!= 0)
4199 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4200 map
->p_paddr_valid
= 0;
4203 elf_tdata (obfd
)->segment_map
= map_first
;
4205 /* If we had to estimate the number of program headers that were
4206 going to be needed, then check our estimate know and adjust
4207 the offset if necessary. */
4208 if (phdr_adjust_seg
!= NULL
)
4212 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4215 if (count
> phdr_adjust_num
)
4216 phdr_adjust_seg
->p_paddr
4217 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4221 /* Final Step: Sort the segments into ascending order of physical
4223 if (map_first
!= NULL
)
4225 struct elf_segment_map
*prev
;
4228 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4230 /* Yes I know - its a bubble sort.... */
4231 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4233 /* Swap map and map->next. */
4234 prev
->next
= map
->next
;
4235 map
->next
= map
->next
->next
;
4236 prev
->next
->next
= map
;
4246 #undef IS_CONTAINED_BY_VMA
4247 #undef IS_CONTAINED_BY_LMA
4248 #undef IS_COREFILE_NOTE
4249 #undef IS_SOLARIS_PT_INTERP
4250 #undef INCLUDE_SECTION_IN_SEGMENT
4251 #undef SEGMENT_AFTER_SEGMENT
4252 #undef SEGMENT_OVERLAPS
4256 /* Copy private section information. This copies over the entsize
4257 field, and sometimes the info field. */
4260 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4266 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4268 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4269 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4272 /* Copy over private BFD data if it has not already been copied.
4273 This must be done here, rather than in the copy_private_bfd_data
4274 entry point, because the latter is called after the section
4275 contents have been set, which means that the program headers have
4276 already been worked out. */
4277 if (elf_tdata (obfd
)->segment_map
== NULL
4278 && elf_tdata (ibfd
)->phdr
!= NULL
)
4282 /* Only set up the segments if there are no more SEC_ALLOC
4283 sections. FIXME: This won't do the right thing if objcopy is
4284 used to remove the last SEC_ALLOC section, since objcopy
4285 won't call this routine in that case. */
4286 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4287 if ((s
->flags
& SEC_ALLOC
) != 0)
4291 if (! copy_private_bfd_data (ibfd
, obfd
))
4296 ihdr
= &elf_section_data (isec
)->this_hdr
;
4297 ohdr
= &elf_section_data (osec
)->this_hdr
;
4299 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4301 if (ihdr
->sh_type
== SHT_SYMTAB
4302 || ihdr
->sh_type
== SHT_DYNSYM
4303 || ihdr
->sh_type
== SHT_GNU_verneed
4304 || ihdr
->sh_type
== SHT_GNU_verdef
)
4305 ohdr
->sh_info
= ihdr
->sh_info
;
4307 elf_section_data (osec
)->use_rela_p
4308 = elf_section_data (isec
)->use_rela_p
;
4313 /* Copy private symbol information. If this symbol is in a section
4314 which we did not map into a BFD section, try to map the section
4315 index correctly. We use special macro definitions for the mapped
4316 section indices; these definitions are interpreted by the
4317 swap_out_syms function. */
4319 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4320 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4321 #define MAP_STRTAB (SHN_LORESERVE - 3)
4322 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4325 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4331 elf_symbol_type
*isym
, *osym
;
4333 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4334 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4337 isym
= elf_symbol_from (ibfd
, isymarg
);
4338 osym
= elf_symbol_from (obfd
, osymarg
);
4342 && bfd_is_abs_section (isym
->symbol
.section
))
4346 shndx
= isym
->internal_elf_sym
.st_shndx
;
4347 if (shndx
== elf_onesymtab (ibfd
))
4348 shndx
= MAP_ONESYMTAB
;
4349 else if (shndx
== elf_dynsymtab (ibfd
))
4350 shndx
= MAP_DYNSYMTAB
;
4351 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4353 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4354 shndx
= MAP_SHSTRTAB
;
4355 osym
->internal_elf_sym
.st_shndx
= shndx
;
4361 /* Swap out the symbols. */
4364 swap_out_syms (abfd
, sttp
, relocatable_p
)
4366 struct bfd_strtab_hash
**sttp
;
4369 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4371 if (!elf_map_symbols (abfd
))
4374 /* Dump out the symtabs. */
4376 int symcount
= bfd_get_symcount (abfd
);
4377 asymbol
**syms
= bfd_get_outsymbols (abfd
);
4378 struct bfd_strtab_hash
*stt
;
4379 Elf_Internal_Shdr
*symtab_hdr
;
4380 Elf_Internal_Shdr
*symstrtab_hdr
;
4381 char *outbound_syms
;
4384 stt
= _bfd_elf_stringtab_init ();
4388 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4389 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4390 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4391 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4392 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4393 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4395 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4396 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4398 outbound_syms
= bfd_alloc (abfd
,
4399 (1 + symcount
) * bed
->s
->sizeof_sym
);
4400 if (outbound_syms
== NULL
)
4402 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4404 /* now generate the data (for "contents") */
4406 /* Fill in zeroth symbol and swap it out. */
4407 Elf_Internal_Sym sym
;
4413 sym
.st_shndx
= SHN_UNDEF
;
4414 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4415 outbound_syms
+= bed
->s
->sizeof_sym
;
4417 for (idx
= 0; idx
< symcount
; idx
++)
4419 Elf_Internal_Sym sym
;
4420 bfd_vma value
= syms
[idx
]->value
;
4421 elf_symbol_type
*type_ptr
;
4422 flagword flags
= syms
[idx
]->flags
;
4425 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
4427 /* Local section symbols have no name. */
4432 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4435 if (sym
.st_name
== (unsigned long) -1)
4439 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4441 if ((flags
& BSF_SECTION_SYM
) == 0
4442 && bfd_is_com_section (syms
[idx
]->section
))
4444 /* ELF common symbols put the alignment into the `value' field,
4445 and the size into the `size' field. This is backwards from
4446 how BFD handles it, so reverse it here. */
4447 sym
.st_size
= value
;
4448 if (type_ptr
== NULL
4449 || type_ptr
->internal_elf_sym
.st_value
== 0)
4450 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4452 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4453 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4454 (abfd
, syms
[idx
]->section
);
4458 asection
*sec
= syms
[idx
]->section
;
4461 if (sec
->output_section
)
4463 value
+= sec
->output_offset
;
4464 sec
= sec
->output_section
;
4466 /* Don't add in the section vma for relocatable output. */
4467 if (! relocatable_p
)
4469 sym
.st_value
= value
;
4470 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4472 if (bfd_is_abs_section (sec
)
4474 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4476 /* This symbol is in a real ELF section which we did
4477 not create as a BFD section. Undo the mapping done
4478 by copy_private_symbol_data. */
4479 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4483 shndx
= elf_onesymtab (abfd
);
4486 shndx
= elf_dynsymtab (abfd
);
4489 shndx
= elf_tdata (abfd
)->strtab_section
;
4492 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4500 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4506 /* Writing this would be a hell of a lot easier if
4507 we had some decent documentation on bfd, and
4508 knew what to expect of the library, and what to
4509 demand of applications. For example, it
4510 appears that `objcopy' might not set the
4511 section of a symbol to be a section that is
4512 actually in the output file. */
4513 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4514 BFD_ASSERT (sec2
!= 0);
4515 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4516 BFD_ASSERT (shndx
!= -1);
4520 sym
.st_shndx
= shndx
;
4523 if ((flags
& BSF_FUNCTION
) != 0)
4525 else if ((flags
& BSF_OBJECT
) != 0)
4530 /* Processor-specific types */
4531 if (type_ptr
!= NULL
4532 && bed
->elf_backend_get_symbol_type
)
4533 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4535 if (flags
& BSF_SECTION_SYM
)
4537 if (flags
& BSF_GLOBAL
)
4538 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
4540 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4542 else if (bfd_is_com_section (syms
[idx
]->section
))
4543 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4544 else if (bfd_is_und_section (syms
[idx
]->section
))
4545 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4549 else if (flags
& BSF_FILE
)
4550 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4553 int bind
= STB_LOCAL
;
4555 if (flags
& BSF_LOCAL
)
4557 else if (flags
& BSF_WEAK
)
4559 else if (flags
& BSF_GLOBAL
)
4562 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4565 if (type_ptr
!= NULL
)
4566 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4570 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4571 outbound_syms
+= bed
->s
->sizeof_sym
;
4575 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4576 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4578 symstrtab_hdr
->sh_flags
= 0;
4579 symstrtab_hdr
->sh_addr
= 0;
4580 symstrtab_hdr
->sh_entsize
= 0;
4581 symstrtab_hdr
->sh_link
= 0;
4582 symstrtab_hdr
->sh_info
= 0;
4583 symstrtab_hdr
->sh_addralign
= 1;
4589 /* Return the number of bytes required to hold the symtab vector.
4591 Note that we base it on the count plus 1, since we will null terminate
4592 the vector allocated based on this size. However, the ELF symbol table
4593 always has a dummy entry as symbol #0, so it ends up even. */
4596 _bfd_elf_get_symtab_upper_bound (abfd
)
4601 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4603 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4604 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4610 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4615 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4617 if (elf_dynsymtab (abfd
) == 0)
4619 bfd_set_error (bfd_error_invalid_operation
);
4623 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4624 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4630 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4631 bfd
*abfd ATTRIBUTE_UNUSED
;
4634 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4637 /* Canonicalize the relocs. */
4640 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4649 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4655 tblptr
= section
->relocation
;
4656 for (i
= 0; i
< section
->reloc_count
; i
++)
4657 *relptr
++ = tblptr
++;
4661 return section
->reloc_count
;
4665 _bfd_elf_get_symtab (abfd
, alocation
)
4667 asymbol
**alocation
;
4669 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4670 (abfd
, alocation
, false);
4673 bfd_get_symcount (abfd
) = symcount
;
4678 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4680 asymbol
**alocation
;
4682 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4683 (abfd
, alocation
, true);
4686 /* Return the size required for the dynamic reloc entries. Any
4687 section that was actually installed in the BFD, and has type
4688 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4689 considered to be a dynamic reloc section. */
4692 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4698 if (elf_dynsymtab (abfd
) == 0)
4700 bfd_set_error (bfd_error_invalid_operation
);
4704 ret
= sizeof (arelent
*);
4705 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4706 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4707 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4708 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4709 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4710 * sizeof (arelent
*));
4715 /* Canonicalize the dynamic relocation entries. Note that we return
4716 the dynamic relocations as a single block, although they are
4717 actually associated with particular sections; the interface, which
4718 was designed for SunOS style shared libraries, expects that there
4719 is only one set of dynamic relocs. Any section that was actually
4720 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4721 the dynamic symbol table, is considered to be a dynamic reloc
4725 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4730 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4734 if (elf_dynsymtab (abfd
) == 0)
4736 bfd_set_error (bfd_error_invalid_operation
);
4740 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4742 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4744 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4745 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4746 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4751 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4753 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4755 for (i
= 0; i
< count
; i
++)
4766 /* Read in the version information. */
4769 _bfd_elf_slurp_version_tables (abfd
)
4772 bfd_byte
*contents
= NULL
;
4774 if (elf_dynverdef (abfd
) != 0)
4776 Elf_Internal_Shdr
*hdr
;
4777 Elf_External_Verdef
*everdef
;
4778 Elf_Internal_Verdef
*iverdef
;
4779 Elf_Internal_Verdef
*iverdefarr
;
4780 Elf_Internal_Verdef iverdefmem
;
4782 unsigned int maxidx
;
4784 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4786 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4787 if (contents
== NULL
)
4789 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4790 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4793 /* We know the number of entries in the section but not the maximum
4794 index. Therefore we have to run through all entries and find
4796 everdef
= (Elf_External_Verdef
*) contents
;
4798 for (i
= 0; i
< hdr
->sh_info
; ++i
)
4800 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4802 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
4803 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
4805 everdef
= ((Elf_External_Verdef
*)
4806 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
4809 elf_tdata (abfd
)->verdef
=
4810 ((Elf_Internal_Verdef
*)
4811 bfd_zalloc (abfd
, maxidx
* sizeof (Elf_Internal_Verdef
)));
4812 if (elf_tdata (abfd
)->verdef
== NULL
)
4815 elf_tdata (abfd
)->cverdefs
= maxidx
;
4817 everdef
= (Elf_External_Verdef
*) contents
;
4818 iverdefarr
= elf_tdata (abfd
)->verdef
;
4819 for (i
= 0; i
< hdr
->sh_info
; i
++)
4821 Elf_External_Verdaux
*everdaux
;
4822 Elf_Internal_Verdaux
*iverdaux
;
4825 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4827 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
4828 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
4830 iverdef
->vd_bfd
= abfd
;
4832 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4835 * sizeof (Elf_Internal_Verdaux
))));
4836 if (iverdef
->vd_auxptr
== NULL
)
4839 everdaux
= ((Elf_External_Verdaux
*)
4840 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4841 iverdaux
= iverdef
->vd_auxptr
;
4842 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4844 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4846 iverdaux
->vda_nodename
=
4847 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4848 iverdaux
->vda_name
);
4849 if (iverdaux
->vda_nodename
== NULL
)
4852 if (j
+ 1 < iverdef
->vd_cnt
)
4853 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4855 iverdaux
->vda_nextptr
= NULL
;
4857 everdaux
= ((Elf_External_Verdaux
*)
4858 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4861 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4863 if (i
+ 1 < hdr
->sh_info
)
4864 iverdef
->vd_nextdef
= iverdef
+ 1;
4866 iverdef
->vd_nextdef
= NULL
;
4868 everdef
= ((Elf_External_Verdef
*)
4869 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4876 if (elf_dynverref (abfd
) != 0)
4878 Elf_Internal_Shdr
*hdr
;
4879 Elf_External_Verneed
*everneed
;
4880 Elf_Internal_Verneed
*iverneed
;
4883 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4885 elf_tdata (abfd
)->verref
=
4886 ((Elf_Internal_Verneed
*)
4887 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4888 if (elf_tdata (abfd
)->verref
== NULL
)
4891 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4893 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4894 if (contents
== NULL
)
4896 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4897 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4900 everneed
= (Elf_External_Verneed
*) contents
;
4901 iverneed
= elf_tdata (abfd
)->verref
;
4902 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4904 Elf_External_Vernaux
*evernaux
;
4905 Elf_Internal_Vernaux
*ivernaux
;
4908 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4910 iverneed
->vn_bfd
= abfd
;
4912 iverneed
->vn_filename
=
4913 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4915 if (iverneed
->vn_filename
== NULL
)
4918 iverneed
->vn_auxptr
=
4919 ((Elf_Internal_Vernaux
*)
4921 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4923 evernaux
= ((Elf_External_Vernaux
*)
4924 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4925 ivernaux
= iverneed
->vn_auxptr
;
4926 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4928 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4930 ivernaux
->vna_nodename
=
4931 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4932 ivernaux
->vna_name
);
4933 if (ivernaux
->vna_nodename
== NULL
)
4936 if (j
+ 1 < iverneed
->vn_cnt
)
4937 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4939 ivernaux
->vna_nextptr
= NULL
;
4941 evernaux
= ((Elf_External_Vernaux
*)
4942 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4945 if (i
+ 1 < hdr
->sh_info
)
4946 iverneed
->vn_nextref
= iverneed
+ 1;
4948 iverneed
->vn_nextref
= NULL
;
4950 everneed
= ((Elf_External_Verneed
*)
4951 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4961 if (contents
== NULL
)
4967 _bfd_elf_make_empty_symbol (abfd
)
4970 elf_symbol_type
*newsym
;
4972 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4977 newsym
->symbol
.the_bfd
= abfd
;
4978 return &newsym
->symbol
;
4983 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4984 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4988 bfd_symbol_info (symbol
, ret
);
4991 /* Return whether a symbol name implies a local symbol. Most targets
4992 use this function for the is_local_label_name entry point, but some
4996 _bfd_elf_is_local_label_name (abfd
, name
)
4997 bfd
*abfd ATTRIBUTE_UNUSED
;
5000 /* Normal local symbols start with ``.L''. */
5001 if (name
[0] == '.' && name
[1] == 'L')
5004 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5005 DWARF debugging symbols starting with ``..''. */
5006 if (name
[0] == '.' && name
[1] == '.')
5009 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5010 emitting DWARF debugging output. I suspect this is actually a
5011 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5012 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5013 underscore to be emitted on some ELF targets). For ease of use,
5014 we treat such symbols as local. */
5015 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5022 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5023 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5024 asymbol
*symbol ATTRIBUTE_UNUSED
;
5031 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5033 enum bfd_architecture arch
;
5034 unsigned long machine
;
5036 /* If this isn't the right architecture for this backend, and this
5037 isn't the generic backend, fail. */
5038 if (arch
!= get_elf_backend_data (abfd
)->arch
5039 && arch
!= bfd_arch_unknown
5040 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5043 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5046 /* Find the function to a particular section and offset,
5047 for error reporting. */
5050 elf_find_function (abfd
, section
, symbols
, offset
,
5051 filename_ptr
, functionname_ptr
)
5052 bfd
*abfd ATTRIBUTE_UNUSED
;
5056 const char **filename_ptr
;
5057 const char **functionname_ptr
;
5059 const char *filename
;
5068 for (p
= symbols
; *p
!= NULL
; p
++)
5072 q
= (elf_symbol_type
*) *p
;
5074 if (bfd_get_section (&q
->symbol
) != section
)
5077 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5082 filename
= bfd_asymbol_name (&q
->symbol
);
5086 if (q
->symbol
.section
== section
5087 && q
->symbol
.value
>= low_func
5088 && q
->symbol
.value
<= offset
)
5090 func
= (asymbol
*) q
;
5091 low_func
= q
->symbol
.value
;
5101 *filename_ptr
= filename
;
5102 if (functionname_ptr
)
5103 *functionname_ptr
= bfd_asymbol_name (func
);
5108 /* Find the nearest line to a particular section and offset,
5109 for error reporting. */
5112 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5113 filename_ptr
, functionname_ptr
, line_ptr
)
5118 const char **filename_ptr
;
5119 const char **functionname_ptr
;
5120 unsigned int *line_ptr
;
5124 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5125 filename_ptr
, functionname_ptr
,
5128 if (!*functionname_ptr
)
5129 elf_find_function (abfd
, section
, symbols
, offset
,
5130 *filename_ptr
? NULL
: filename_ptr
,
5136 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5137 filename_ptr
, functionname_ptr
,
5139 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5141 if (!*functionname_ptr
)
5142 elf_find_function (abfd
, section
, symbols
, offset
,
5143 *filename_ptr
? NULL
: filename_ptr
,
5149 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5150 &found
, filename_ptr
,
5151 functionname_ptr
, line_ptr
,
5152 &elf_tdata (abfd
)->line_info
))
5157 if (symbols
== NULL
)
5160 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5161 filename_ptr
, functionname_ptr
))
5169 _bfd_elf_sizeof_headers (abfd
, reloc
)
5175 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5177 ret
+= get_program_header_size (abfd
);
5182 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5187 bfd_size_type count
;
5189 Elf_Internal_Shdr
*hdr
;
5191 if (! abfd
->output_has_begun
5192 && ! _bfd_elf_compute_section_file_positions
5193 (abfd
, (struct bfd_link_info
*) NULL
))
5196 hdr
= &elf_section_data (section
)->this_hdr
;
5198 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
5200 if (bfd_write (location
, 1, count
, abfd
) != count
)
5207 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5208 bfd
*abfd ATTRIBUTE_UNUSED
;
5209 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5210 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5217 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5220 Elf_Internal_Rel
*dst
;
5226 /* Try to convert a non-ELF reloc into an ELF one. */
5229 _bfd_elf_validate_reloc (abfd
, areloc
)
5233 /* Check whether we really have an ELF howto. */
5235 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5237 bfd_reloc_code_real_type code
;
5238 reloc_howto_type
*howto
;
5240 /* Alien reloc: Try to determine its type to replace it with an
5241 equivalent ELF reloc. */
5243 if (areloc
->howto
->pc_relative
)
5245 switch (areloc
->howto
->bitsize
)
5248 code
= BFD_RELOC_8_PCREL
;
5251 code
= BFD_RELOC_12_PCREL
;
5254 code
= BFD_RELOC_16_PCREL
;
5257 code
= BFD_RELOC_24_PCREL
;
5260 code
= BFD_RELOC_32_PCREL
;
5263 code
= BFD_RELOC_64_PCREL
;
5269 howto
= bfd_reloc_type_lookup (abfd
, code
);
5271 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5273 if (howto
->pcrel_offset
)
5274 areloc
->addend
+= areloc
->address
;
5276 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5281 switch (areloc
->howto
->bitsize
)
5287 code
= BFD_RELOC_14
;
5290 code
= BFD_RELOC_16
;
5293 code
= BFD_RELOC_26
;
5296 code
= BFD_RELOC_32
;
5299 code
= BFD_RELOC_64
;
5305 howto
= bfd_reloc_type_lookup (abfd
, code
);
5309 areloc
->howto
= howto
;
5317 (*_bfd_error_handler
)
5318 (_("%s: unsupported relocation type %s"),
5319 bfd_get_filename (abfd
), areloc
->howto
->name
);
5320 bfd_set_error (bfd_error_bad_value
);
5325 _bfd_elf_close_and_cleanup (abfd
)
5328 if (bfd_get_format (abfd
) == bfd_object
)
5330 if (elf_shstrtab (abfd
) != NULL
)
5331 _bfd_stringtab_free (elf_shstrtab (abfd
));
5334 return _bfd_generic_close_and_cleanup (abfd
);
5337 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5338 in the relocation's offset. Thus we cannot allow any sort of sanity
5339 range-checking to interfere. There is nothing else to do in processing
5342 bfd_reloc_status_type
5343 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5344 bfd
*abfd ATTRIBUTE_UNUSED
;
5345 arelent
*re ATTRIBUTE_UNUSED
;
5346 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5347 PTR data ATTRIBUTE_UNUSED
;
5348 asection
*is ATTRIBUTE_UNUSED
;
5349 bfd
*obfd ATTRIBUTE_UNUSED
;
5350 char **errmsg ATTRIBUTE_UNUSED
;
5352 return bfd_reloc_ok
;
5355 /* Elf core file support. Much of this only works on native
5356 toolchains, since we rely on knowing the
5357 machine-dependent procfs structure in order to pick
5358 out details about the corefile. */
5360 #ifdef HAVE_SYS_PROCFS_H
5361 # include <sys/procfs.h>
5364 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5367 elfcore_make_pid (abfd
)
5370 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5371 + (elf_tdata (abfd
)->core_pid
));
5374 /* If there isn't a section called NAME, make one, using
5375 data from SECT. Note, this function will generate a
5376 reference to NAME, so you shouldn't deallocate or
5380 elfcore_maybe_make_sect (abfd
, name
, sect
)
5387 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5390 sect2
= bfd_make_section (abfd
, name
);
5394 sect2
->_raw_size
= sect
->_raw_size
;
5395 sect2
->filepos
= sect
->filepos
;
5396 sect2
->flags
= sect
->flags
;
5397 sect2
->alignment_power
= sect
->alignment_power
;
5401 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
5402 actually creates up to two pseudosections:
5403 - For the single-threaded case, a section named NAME, unless
5404 such a section already exists.
5405 - For the multi-threaded case, a section named "NAME/PID", where
5406 PID is elfcore_make_pid (abfd).
5407 Both pseudosections have identical contents. */
5409 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
5416 char *threaded_name
;
5419 /* Build the section name. */
5421 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5422 threaded_name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5423 if (threaded_name
== NULL
)
5425 strcpy (threaded_name
, buf
);
5427 sect
= bfd_make_section (abfd
, threaded_name
);
5430 sect
->_raw_size
= size
;
5431 sect
->filepos
= filepos
;
5432 sect
->flags
= SEC_HAS_CONTENTS
;
5433 sect
->alignment_power
= 2;
5435 return elfcore_maybe_make_sect (abfd
, name
, sect
);
5438 /* prstatus_t exists on:
5440 linux 2.[01] + glibc
5444 #if defined (HAVE_PRSTATUS_T)
5445 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
5448 elfcore_grok_prstatus (abfd
, note
)
5450 Elf_Internal_Note
*note
;
5455 if (note
->descsz
== sizeof (prstatus_t
))
5459 raw_size
= sizeof (prstat
.pr_reg
);
5460 offset
= offsetof (prstatus_t
, pr_reg
);
5461 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5463 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5464 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5466 /* pr_who exists on:
5469 pr_who doesn't exist on:
5472 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5473 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5476 #if defined (HAVE_PRSTATUS32_T)
5477 else if (note
->descsz
== sizeof (prstatus32_t
))
5479 /* 64-bit host, 32-bit corefile */
5480 prstatus32_t prstat
;
5482 raw_size
= sizeof (prstat
.pr_reg
);
5483 offset
= offsetof (prstatus32_t
, pr_reg
);
5484 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5486 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5487 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5489 /* pr_who exists on:
5492 pr_who doesn't exist on:
5495 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5496 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5499 #endif /* HAVE_PRSTATUS32_T */
5502 /* Fail - we don't know how to handle any other
5503 note size (ie. data object type). */
5507 /* Make a ".reg/999" section and a ".reg" section. */
5508 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
5509 raw_size
, note
->descpos
+ offset
);
5511 #endif /* defined (HAVE_PRSTATUS_T) */
5513 /* Create a pseudosection containing the exact contents of NOTE. */
5515 elfcore_make_note_pseudosection (abfd
, name
, note
)
5518 Elf_Internal_Note
*note
;
5520 return _bfd_elfcore_make_pseudosection (abfd
, name
,
5521 note
->descsz
, note
->descpos
);
5524 /* There isn't a consistent prfpregset_t across platforms,
5525 but it doesn't matter, because we don't have to pick this
5526 data structure apart. */
5529 elfcore_grok_prfpreg (abfd
, note
)
5531 Elf_Internal_Note
*note
;
5533 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
5536 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5537 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5541 elfcore_grok_prxfpreg (abfd
, note
)
5543 Elf_Internal_Note
*note
;
5545 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
5548 #if defined (HAVE_PRPSINFO_T)
5549 typedef prpsinfo_t elfcore_psinfo_t
;
5550 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5551 typedef prpsinfo32_t elfcore_psinfo32_t
;
5555 #if defined (HAVE_PSINFO_T)
5556 typedef psinfo_t elfcore_psinfo_t
;
5557 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5558 typedef psinfo32_t elfcore_psinfo32_t
;
5562 /* return a malloc'ed copy of a string at START which is at
5563 most MAX bytes long, possibly without a terminating '\0'.
5564 the copy will always have a terminating '\0'. */
5567 _bfd_elfcore_strndup (abfd
, start
, max
)
5573 char *end
= memchr (start
, '\0', max
);
5581 dup
= bfd_alloc (abfd
, len
+ 1);
5585 memcpy (dup
, start
, len
);
5591 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5592 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
5595 elfcore_grok_psinfo (abfd
, note
)
5597 Elf_Internal_Note
*note
;
5599 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
5601 elfcore_psinfo_t psinfo
;
5603 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5605 elf_tdata (abfd
)->core_program
5606 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5607 sizeof (psinfo
.pr_fname
));
5609 elf_tdata (abfd
)->core_command
5610 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5611 sizeof (psinfo
.pr_psargs
));
5613 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5614 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
5616 /* 64-bit host, 32-bit corefile */
5617 elfcore_psinfo32_t psinfo
;
5619 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5621 elf_tdata (abfd
)->core_program
5622 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5623 sizeof (psinfo
.pr_fname
));
5625 elf_tdata (abfd
)->core_command
5626 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5627 sizeof (psinfo
.pr_psargs
));
5633 /* Fail - we don't know how to handle any other
5634 note size (ie. data object type). */
5638 /* Note that for some reason, a spurious space is tacked
5639 onto the end of the args in some (at least one anyway)
5640 implementations, so strip it off if it exists. */
5643 char *command
= elf_tdata (abfd
)->core_command
;
5644 int n
= strlen (command
);
5646 if (0 < n
&& command
[n
- 1] == ' ')
5647 command
[n
- 1] = '\0';
5652 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5654 #if defined (HAVE_PSTATUS_T)
5656 elfcore_grok_pstatus (abfd
, note
)
5658 Elf_Internal_Note
*note
;
5660 if (note
->descsz
== sizeof (pstatus_t
)
5661 #if defined (HAVE_PXSTATUS_T)
5662 || note
->descsz
== sizeof (pxstatus_t
)
5668 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5670 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5672 #if defined (HAVE_PSTATUS32_T)
5673 else if (note
->descsz
== sizeof (pstatus32_t
))
5675 /* 64-bit host, 32-bit corefile */
5678 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5680 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5683 /* Could grab some more details from the "representative"
5684 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5685 NT_LWPSTATUS note, presumably. */
5689 #endif /* defined (HAVE_PSTATUS_T) */
5691 #if defined (HAVE_LWPSTATUS_T)
5693 elfcore_grok_lwpstatus (abfd
, note
)
5695 Elf_Internal_Note
*note
;
5697 lwpstatus_t lwpstat
;
5702 if (note
->descsz
!= sizeof (lwpstat
)
5703 #if defined (HAVE_LWPXSTATUS_T)
5704 && note
->descsz
!= sizeof (lwpxstatus_t
)
5709 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5711 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5712 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5714 /* Make a ".reg/999" section. */
5716 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5717 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5722 sect
= bfd_make_section (abfd
, name
);
5726 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5727 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5728 sect
->filepos
= note
->descpos
5729 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5732 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5733 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5734 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5737 sect
->flags
= SEC_HAS_CONTENTS
;
5738 sect
->alignment_power
= 2;
5740 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5743 /* Make a ".reg2/999" section */
5745 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5746 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5751 sect
= bfd_make_section (abfd
, name
);
5755 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5756 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5757 sect
->filepos
= note
->descpos
5758 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5761 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5762 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5763 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5766 sect
->flags
= SEC_HAS_CONTENTS
;
5767 sect
->alignment_power
= 2;
5769 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
5771 #endif /* defined (HAVE_LWPSTATUS_T) */
5773 #if defined (HAVE_WIN32_PSTATUS_T)
5775 elfcore_grok_win32pstatus (abfd
, note
)
5777 Elf_Internal_Note
*note
;
5782 win32_pstatus_t pstatus
;
5784 if (note
->descsz
< sizeof (pstatus
))
5787 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
5789 switch (pstatus
.data_type
)
5791 case NOTE_INFO_PROCESS
:
5792 /* FIXME: need to add ->core_command. */
5793 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
5794 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
5797 case NOTE_INFO_THREAD
:
5798 /* Make a ".reg/999" section. */
5799 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
5801 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5807 sect
= bfd_make_section (abfd
, name
);
5811 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
5812 sect
->filepos
= note
->descpos
+ offsetof (struct win32_pstatus
,
5813 data
.thread_info
.thread_context
);
5814 sect
->flags
= SEC_HAS_CONTENTS
;
5815 sect
->alignment_power
= 2;
5817 if (pstatus
.data
.thread_info
.is_active_thread
)
5818 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5822 case NOTE_INFO_MODULE
:
5823 /* Make a ".module/xxxxxxxx" section. */
5824 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
5826 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5832 sect
= bfd_make_section (abfd
, name
);
5837 sect
->_raw_size
= note
->descsz
;
5838 sect
->filepos
= note
->descpos
;
5839 sect
->flags
= SEC_HAS_CONTENTS
;
5840 sect
->alignment_power
= 2;
5849 #endif /* HAVE_WIN32_PSTATUS_T */
5852 elfcore_grok_note (abfd
, note
)
5854 Elf_Internal_Note
*note
;
5856 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5864 if (bed
->elf_backend_grok_prstatus
)
5865 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
5867 #if defined (HAVE_PRSTATUS_T)
5868 return elfcore_grok_prstatus (abfd
, note
);
5873 #if defined (HAVE_PSTATUS_T)
5875 return elfcore_grok_pstatus (abfd
, note
);
5878 #if defined (HAVE_LWPSTATUS_T)
5880 return elfcore_grok_lwpstatus (abfd
, note
);
5883 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5884 return elfcore_grok_prfpreg (abfd
, note
);
5886 #if defined (HAVE_WIN32_PSTATUS_T)
5887 case NT_WIN32PSTATUS
:
5888 return elfcore_grok_win32pstatus (abfd
, note
);
5891 case NT_PRXFPREG
: /* Linux SSE extension */
5892 if (note
->namesz
== 5
5893 && ! strcmp (note
->namedata
, "LINUX"))
5894 return elfcore_grok_prxfpreg (abfd
, note
);
5900 if (bed
->elf_backend_grok_psinfo
)
5901 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
5903 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5904 return elfcore_grok_psinfo (abfd
, note
);
5912 elfcore_read_notes (abfd
, offset
, size
)
5923 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5926 buf
= bfd_malloc ((size_t) size
);
5930 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5938 while (p
< buf
+ size
)
5940 /* FIXME: bad alignment assumption. */
5941 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
5942 Elf_Internal_Note in
;
5944 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5946 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5947 in
.namedata
= xnp
->name
;
5949 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5950 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5951 in
.descpos
= offset
+ (in
.descdata
- buf
);
5953 if (! elfcore_grok_note (abfd
, &in
))
5956 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5963 /* Providing external access to the ELF program header table. */
5965 /* Return an upper bound on the number of bytes required to store a
5966 copy of ABFD's program header table entries. Return -1 if an error
5967 occurs; bfd_get_error will return an appropriate code. */
5970 bfd_get_elf_phdr_upper_bound (abfd
)
5973 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5975 bfd_set_error (bfd_error_wrong_format
);
5979 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
5982 /* Copy ABFD's program header table entries to *PHDRS. The entries
5983 will be stored as an array of Elf_Internal_Phdr structures, as
5984 defined in include/elf/internal.h. To find out how large the
5985 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5987 Return the number of program header table entries read, or -1 if an
5988 error occurs; bfd_get_error will return an appropriate code. */
5991 bfd_get_elf_phdrs (abfd
, phdrs
)
5997 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5999 bfd_set_error (bfd_error_wrong_format
);
6003 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
6004 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
6005 num_phdrs
* sizeof (Elf_Internal_Phdr
));
6011 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
6012 bfd
*abfd ATTRIBUTE_UNUSED
;
6017 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6019 i_ehdrp
= elf_elfheader (abfd
);
6020 if (i_ehdrp
== NULL
)
6021 sprintf_vma (buf
, value
);
6024 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6026 #if BFD_HOST_64BIT_LONG
6027 sprintf (buf
, "%016lx", value
);
6029 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
6030 _bfd_int64_low (value
));
6034 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
6037 sprintf_vma (buf
, value
);
6042 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
6043 bfd
*abfd ATTRIBUTE_UNUSED
;
6048 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6050 i_ehdrp
= elf_elfheader (abfd
);
6051 if (i_ehdrp
== NULL
)
6052 fprintf_vma ((FILE *) stream
, value
);
6055 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6057 #if BFD_HOST_64BIT_LONG
6058 fprintf ((FILE *) stream
, "%016lx", value
);
6060 fprintf ((FILE *) stream
, "%08lx%08lx",
6061 _bfd_int64_high (value
), _bfd_int64_low (value
));
6065 fprintf ((FILE *) stream
, "%08lx",
6066 (unsigned long) (value
& 0xffffffff));
6069 fprintf_vma ((FILE *) stream
, value
);
6073 enum elf_reloc_type_class
6074 _bfd_elf_reloc_type_class (type
)
6075 int type ATTRIBUTE_UNUSED
;
6077 return reloc_class_normal
;