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. */
3455 i_ehdrp
->e_machine
= EM_NONE
;
3457 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3458 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3460 /* No program header, for now. */
3461 i_ehdrp
->e_phoff
= 0;
3462 i_ehdrp
->e_phentsize
= 0;
3463 i_ehdrp
->e_phnum
= 0;
3465 /* Each bfd section is section header entry. */
3466 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3467 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3469 /* If we're building an executable, we'll need a program header table. */
3470 if (abfd
->flags
& EXEC_P
)
3472 /* It all happens later. */
3474 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3476 /* elf_build_phdrs() returns a (NULL-terminated) array of
3477 Elf_Internal_Phdrs. */
3478 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3479 i_ehdrp
->e_phoff
= outbase
;
3480 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3485 i_ehdrp
->e_phentsize
= 0;
3487 i_ehdrp
->e_phoff
= 0;
3490 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3491 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3492 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3493 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3494 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3495 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3496 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3497 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3498 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3504 /* Assign file positions for all the reloc sections which are not part
3505 of the loadable file image. */
3508 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3513 Elf_Internal_Shdr
**shdrpp
;
3515 off
= elf_tdata (abfd
)->next_file_pos
;
3517 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3518 i
< elf_elfheader (abfd
)->e_shnum
;
3521 Elf_Internal_Shdr
*shdrp
;
3524 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3525 && shdrp
->sh_offset
== -1)
3526 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3529 elf_tdata (abfd
)->next_file_pos
= off
;
3533 _bfd_elf_write_object_contents (abfd
)
3536 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3537 Elf_Internal_Ehdr
*i_ehdrp
;
3538 Elf_Internal_Shdr
**i_shdrp
;
3542 if (! abfd
->output_has_begun
3543 && ! _bfd_elf_compute_section_file_positions
3544 (abfd
, (struct bfd_link_info
*) NULL
))
3547 i_shdrp
= elf_elfsections (abfd
);
3548 i_ehdrp
= elf_elfheader (abfd
);
3551 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3555 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3557 /* After writing the headers, we need to write the sections too... */
3558 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3560 if (bed
->elf_backend_section_processing
)
3561 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3562 if (i_shdrp
[count
]->contents
)
3564 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3565 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3567 != i_shdrp
[count
]->sh_size
))
3572 /* Write out the section header names. */
3573 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3574 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3577 if (bed
->elf_backend_final_write_processing
)
3578 (*bed
->elf_backend_final_write_processing
) (abfd
,
3579 elf_tdata (abfd
)->linker
);
3581 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3585 _bfd_elf_write_corefile_contents (abfd
)
3588 /* Hopefully this can be done just like an object file. */
3589 return _bfd_elf_write_object_contents (abfd
);
3592 /* Given a section, search the header to find them. */
3595 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3599 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3600 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3602 Elf_Internal_Shdr
*hdr
;
3603 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3605 for (index
= 0; index
< maxindex
; index
++)
3607 hdr
= i_shdrp
[index
];
3608 if (hdr
->bfd_section
== asect
)
3612 if (bed
->elf_backend_section_from_bfd_section
)
3614 for (index
= 0; index
< maxindex
; index
++)
3618 hdr
= i_shdrp
[index
];
3620 if ((*bed
->elf_backend_section_from_bfd_section
)
3621 (abfd
, hdr
, asect
, &retval
))
3626 if (bfd_is_abs_section (asect
))
3628 if (bfd_is_com_section (asect
))
3630 if (bfd_is_und_section (asect
))
3633 bfd_set_error (bfd_error_nonrepresentable_section
);
3638 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3642 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3644 asymbol
**asym_ptr_ptr
;
3646 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3648 flagword flags
= asym_ptr
->flags
;
3650 /* When gas creates relocations against local labels, it creates its
3651 own symbol for the section, but does put the symbol into the
3652 symbol chain, so udata is 0. When the linker is generating
3653 relocatable output, this section symbol may be for one of the
3654 input sections rather than the output section. */
3655 if (asym_ptr
->udata
.i
== 0
3656 && (flags
& BSF_SECTION_SYM
)
3657 && asym_ptr
->section
)
3661 if (asym_ptr
->section
->output_section
!= NULL
)
3662 indx
= asym_ptr
->section
->output_section
->index
;
3664 indx
= asym_ptr
->section
->index
;
3665 if (indx
< elf_num_section_syms (abfd
)
3666 && elf_section_syms (abfd
)[indx
] != NULL
)
3667 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3670 idx
= asym_ptr
->udata
.i
;
3674 /* This case can occur when using --strip-symbol on a symbol
3675 which is used in a relocation entry. */
3676 (*_bfd_error_handler
)
3677 (_("%s: symbol `%s' required but not present"),
3678 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3679 bfd_set_error (bfd_error_no_symbols
);
3686 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3687 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3688 elf_symbol_flags (flags
));
3696 /* Copy private BFD data. This copies any program header information. */
3699 copy_private_bfd_data (ibfd
, obfd
)
3703 Elf_Internal_Ehdr
* iehdr
;
3704 struct elf_segment_map
* map
;
3705 struct elf_segment_map
* map_first
;
3706 struct elf_segment_map
** pointer_to_map
;
3707 Elf_Internal_Phdr
* segment
;
3710 unsigned int num_segments
;
3711 boolean phdr_included
= false;
3712 bfd_vma maxpagesize
;
3713 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
3714 unsigned int phdr_adjust_num
= 0;
3716 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3717 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3720 if (elf_tdata (ibfd
)->phdr
== NULL
)
3723 iehdr
= elf_elfheader (ibfd
);
3726 pointer_to_map
= &map_first
;
3728 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3729 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3731 /* Returns the end address of the segment + 1. */
3732 #define SEGMENT_END(segment, start) \
3733 (start + (segment->p_memsz > segment->p_filesz \
3734 ? segment->p_memsz : segment->p_filesz))
3736 /* Returns true if the given section is contained within
3737 the given segment. VMA addresses are compared. */
3738 #define IS_CONTAINED_BY_VMA(section, segment) \
3739 (section->vma >= segment->p_vaddr \
3740 && (section->vma + section->_raw_size) \
3741 <= (SEGMENT_END (segment, segment->p_vaddr)))
3743 /* Returns true if the given section is contained within
3744 the given segment. LMA addresses are compared. */
3745 #define IS_CONTAINED_BY_LMA(section, segment, base) \
3746 (section->lma >= base \
3747 && (section->lma + section->_raw_size) \
3748 <= SEGMENT_END (segment, base))
3750 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3751 #define IS_COREFILE_NOTE(p, s) \
3752 (p->p_type == PT_NOTE \
3753 && bfd_get_format (ibfd) == bfd_core \
3754 && s->vma == 0 && s->lma == 0 \
3755 && (bfd_vma) s->filepos >= p->p_offset \
3756 && (bfd_vma) s->filepos + s->_raw_size \
3757 <= p->p_offset + p->p_filesz)
3759 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3760 linker, which generates a PT_INTERP section with p_vaddr and
3761 p_memsz set to 0. */
3762 #define IS_SOLARIS_PT_INTERP(p, s) \
3764 && p->p_filesz > 0 \
3765 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3766 && s->_raw_size > 0 \
3767 && (bfd_vma) s->filepos >= p->p_offset \
3768 && ((bfd_vma) s->filepos + s->_raw_size \
3769 <= p->p_offset + p->p_filesz))
3771 /* Decide if the given section should be included in the given segment.
3772 A section will be included if:
3773 1. It is within the address space of the segment,
3774 2. It is an allocated segment,
3775 3. There is an output section associated with it,
3776 4. The section has not already been allocated to a previous segment. */
3777 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
3778 ((((IS_CONTAINED_BY_VMA (section, segment) \
3779 || IS_SOLARIS_PT_INTERP (segment, section)) \
3780 && (section->flags & SEC_ALLOC) != 0) \
3781 || IS_COREFILE_NOTE (segment, section)) \
3782 && section->output_section != NULL \
3783 && section->segment_mark == false)
3785 /* Returns true iff seg1 starts after the end of seg2. */
3786 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
3787 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
3789 /* Returns true iff seg1 and seg2 overlap. */
3790 #define SEGMENT_OVERLAPS(seg1, seg2) \
3791 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
3793 /* Initialise the segment mark field. */
3794 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3795 section
->segment_mark
= false;
3797 /* Scan through the segments specified in the program header
3798 of the input BFD. For this first scan we look for overlaps
3799 in the loadable segments. These can be created by wierd
3800 parameters to objcopy. */
3801 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3806 Elf_Internal_Phdr
*segment2
;
3808 if (segment
->p_type
!= PT_LOAD
)
3811 /* Determine if this segment overlaps any previous segments. */
3812 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
3814 bfd_signed_vma extra_length
;
3816 if (segment2
->p_type
!= PT_LOAD
3817 || ! SEGMENT_OVERLAPS (segment
, segment2
))
3820 /* Merge the two segments together. */
3821 if (segment2
->p_vaddr
< segment
->p_vaddr
)
3823 /* Extend SEGMENT2 to include SEGMENT and then delete
3826 SEGMENT_END (segment
, segment
->p_vaddr
)
3827 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
3829 if (extra_length
> 0)
3831 segment2
->p_memsz
+= extra_length
;
3832 segment2
->p_filesz
+= extra_length
;
3835 segment
->p_type
= PT_NULL
;
3837 /* Since we have deleted P we must restart the outer loop. */
3839 segment
= elf_tdata (ibfd
)->phdr
;
3844 /* Extend SEGMENT to include SEGMENT2 and then delete
3847 SEGMENT_END (segment2
, segment2
->p_vaddr
)
3848 - SEGMENT_END (segment
, segment
->p_vaddr
);
3850 if (extra_length
> 0)
3852 segment
->p_memsz
+= extra_length
;
3853 segment
->p_filesz
+= extra_length
;
3856 segment2
->p_type
= PT_NULL
;
3861 /* The second scan attempts to assign sections to segments. */
3862 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3866 unsigned int section_count
;
3867 asection
** sections
;
3868 asection
* output_section
;
3870 bfd_vma matching_lma
;
3871 bfd_vma suggested_lma
;
3874 if (segment
->p_type
== PT_NULL
)
3877 /* Compute how many sections might be placed into this segment. */
3879 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3880 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3883 /* Allocate a segment map big enough to contain all of the
3884 sections we have selected. */
3885 map
= ((struct elf_segment_map
*)
3887 (sizeof (struct elf_segment_map
)
3888 + ((size_t) section_count
- 1) * sizeof (asection
*))));
3892 /* Initialise the fields of the segment map. Default to
3893 using the physical address of the segment in the input BFD. */
3895 map
->p_type
= segment
->p_type
;
3896 map
->p_flags
= segment
->p_flags
;
3897 map
->p_flags_valid
= 1;
3898 map
->p_paddr
= segment
->p_paddr
;
3899 map
->p_paddr_valid
= 1;
3901 /* Determine if this segment contains the ELF file header
3902 and if it contains the program headers themselves. */
3903 map
->includes_filehdr
= (segment
->p_offset
== 0
3904 && segment
->p_filesz
>= iehdr
->e_ehsize
);
3906 map
->includes_phdrs
= 0;
3908 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
3910 map
->includes_phdrs
=
3911 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3912 && (segment
->p_offset
+ segment
->p_filesz
3913 >= ((bfd_vma
) iehdr
->e_phoff
3914 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3916 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
3917 phdr_included
= true;
3920 if (section_count
== 0)
3922 /* Special segments, such as the PT_PHDR segment, may contain
3923 no sections, but ordinary, loadable segments should contain
3925 if (segment
->p_type
== PT_LOAD
)
3927 (_("%s: warning: Empty loadable segment detected\n"),
3928 bfd_get_filename (ibfd
));
3931 *pointer_to_map
= map
;
3932 pointer_to_map
= &map
->next
;
3937 /* Now scan the sections in the input BFD again and attempt
3938 to add their corresponding output sections to the segment map.
3939 The problem here is how to handle an output section which has
3940 been moved (ie had its LMA changed). There are four possibilities:
3942 1. None of the sections have been moved.
3943 In this case we can continue to use the segment LMA from the
3946 2. All of the sections have been moved by the same amount.
3947 In this case we can change the segment's LMA to match the LMA
3948 of the first section.
3950 3. Some of the sections have been moved, others have not.
3951 In this case those sections which have not been moved can be
3952 placed in the current segment which will have to have its size,
3953 and possibly its LMA changed, and a new segment or segments will
3954 have to be created to contain the other sections.
3956 4. The sections have been moved, but not be the same amount.
3957 In this case we can change the segment's LMA to match the LMA
3958 of the first section and we will have to create a new segment
3959 or segments to contain the other sections.
3961 In order to save time, we allocate an array to hold the section
3962 pointers that we are interested in. As these sections get assigned
3963 to a segment, they are removed from this array. */
3965 sections
= (asection
**) bfd_malloc
3966 (sizeof (asection
*) * section_count
);
3967 if (sections
== NULL
)
3970 /* Step One: Scan for segment vs section LMA conflicts.
3971 Also add the sections to the section array allocated above.
3972 Also add the sections to the current segment. In the common
3973 case, where the sections have not been moved, this means that
3974 we have completely filled the segment, and there is nothing
3980 for (j
= 0, section
= ibfd
->sections
;
3982 section
= section
->next
)
3984 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3986 output_section
= section
->output_section
;
3988 sections
[j
++] = section
;
3990 /* The Solaris native linker always sets p_paddr to 0.
3991 We try to catch that case here, and set it to the
3993 if (segment
->p_paddr
== 0
3994 && segment
->p_vaddr
!= 0
3996 && output_section
->lma
!= 0
3997 && (output_section
->vma
== (segment
->p_vaddr
3998 + (map
->includes_filehdr
4001 + (map
->includes_phdrs
4002 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4004 map
->p_paddr
= segment
->p_vaddr
;
4006 /* Match up the physical address of the segment with the
4007 LMA address of the output section. */
4008 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4009 || IS_COREFILE_NOTE (segment
, section
))
4011 if (matching_lma
== 0)
4012 matching_lma
= output_section
->lma
;
4014 /* We assume that if the section fits within the segment
4015 then it does not overlap any other section within that
4017 map
->sections
[isec
++] = output_section
;
4019 else if (suggested_lma
== 0)
4020 suggested_lma
= output_section
->lma
;
4024 BFD_ASSERT (j
== section_count
);
4026 /* Step Two: Adjust the physical address of the current segment,
4028 if (isec
== section_count
)
4030 /* All of the sections fitted within the segment as currently
4031 specified. This is the default case. Add the segment to
4032 the list of built segments and carry on to process the next
4033 program header in the input BFD. */
4034 map
->count
= section_count
;
4035 *pointer_to_map
= map
;
4036 pointer_to_map
= &map
->next
;
4043 if (matching_lma
!= 0)
4045 /* At least one section fits inside the current segment.
4046 Keep it, but modify its physical address to match the
4047 LMA of the first section that fitted. */
4048 map
->p_paddr
= matching_lma
;
4052 /* None of the sections fitted inside the current segment.
4053 Change the current segment's physical address to match
4054 the LMA of the first section. */
4055 map
->p_paddr
= suggested_lma
;
4058 /* Offset the segment physical address from the lma
4059 to allow for space taken up by elf headers. */
4060 if (map
->includes_filehdr
)
4061 map
->p_paddr
-= iehdr
->e_ehsize
;
4063 if (map
->includes_phdrs
)
4065 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4067 /* iehdr->e_phnum is just an estimate of the number
4068 of program headers that we will need. Make a note
4069 here of the number we used and the segment we chose
4070 to hold these headers, so that we can adjust the
4071 offset when we know the correct value. */
4072 phdr_adjust_num
= iehdr
->e_phnum
;
4073 phdr_adjust_seg
= map
;
4077 /* Step Three: Loop over the sections again, this time assigning
4078 those that fit to the current segment and remvoing them from the
4079 sections array; but making sure not to leave large gaps. Once all
4080 possible sections have been assigned to the current segment it is
4081 added to the list of built segments and if sections still remain
4082 to be assigned, a new segment is constructed before repeating
4090 /* Fill the current segment with sections that fit. */
4091 for (j
= 0; j
< section_count
; j
++)
4093 section
= sections
[j
];
4095 if (section
== NULL
)
4098 output_section
= section
->output_section
;
4100 BFD_ASSERT (output_section
!= NULL
);
4102 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4103 || IS_COREFILE_NOTE (segment
, section
))
4105 if (map
->count
== 0)
4107 /* If the first section in a segment does not start at
4108 the beginning of the segment, then something is
4110 if (output_section
->lma
!=
4112 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4113 + (map
->includes_phdrs
4114 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4120 asection
* prev_sec
;
4122 prev_sec
= map
->sections
[map
->count
- 1];
4124 /* If the gap between the end of the previous section
4125 and the start of this section is more than
4126 maxpagesize then we need to start a new segment. */
4127 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
4128 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4129 || ((prev_sec
->lma
+ prev_sec
->_raw_size
) > output_section
->lma
))
4131 if (suggested_lma
== 0)
4132 suggested_lma
= output_section
->lma
;
4138 map
->sections
[map
->count
++] = output_section
;
4141 section
->segment_mark
= true;
4143 else if (suggested_lma
== 0)
4144 suggested_lma
= output_section
->lma
;
4147 BFD_ASSERT (map
->count
> 0);
4149 /* Add the current segment to the list of built segments. */
4150 *pointer_to_map
= map
;
4151 pointer_to_map
= &map
->next
;
4153 if (isec
< section_count
)
4155 /* We still have not allocated all of the sections to
4156 segments. Create a new segment here, initialise it
4157 and carry on looping. */
4158 map
= ((struct elf_segment_map
*)
4160 (sizeof (struct elf_segment_map
)
4161 + ((size_t) section_count
- 1)
4162 * sizeof (asection
*))));
4166 /* Initialise the fields of the segment map. Set the physical
4167 physical address to the LMA of the first section that has
4168 not yet been assigned. */
4170 map
->p_type
= segment
->p_type
;
4171 map
->p_flags
= segment
->p_flags
;
4172 map
->p_flags_valid
= 1;
4173 map
->p_paddr
= suggested_lma
;
4174 map
->p_paddr_valid
= 1;
4175 map
->includes_filehdr
= 0;
4176 map
->includes_phdrs
= 0;
4179 while (isec
< section_count
);
4184 /* The Solaris linker creates program headers in which all the
4185 p_paddr fields are zero. When we try to objcopy or strip such a
4186 file, we get confused. Check for this case, and if we find it
4187 reset the p_paddr_valid fields. */
4188 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4189 if (map
->p_paddr
!= 0)
4193 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4194 map
->p_paddr_valid
= 0;
4197 elf_tdata (obfd
)->segment_map
= map_first
;
4199 /* If we had to estimate the number of program headers that were
4200 going to be needed, then check our estimate know and adjust
4201 the offset if necessary. */
4202 if (phdr_adjust_seg
!= NULL
)
4206 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4209 if (count
> phdr_adjust_num
)
4210 phdr_adjust_seg
->p_paddr
4211 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4215 /* Final Step: Sort the segments into ascending order of physical
4217 if (map_first
!= NULL
)
4219 struct elf_segment_map
*prev
;
4222 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4224 /* Yes I know - its a bubble sort.... */
4225 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4227 /* Swap map and map->next. */
4228 prev
->next
= map
->next
;
4229 map
->next
= map
->next
->next
;
4230 prev
->next
->next
= map
;
4240 #undef IS_CONTAINED_BY_VMA
4241 #undef IS_CONTAINED_BY_LMA
4242 #undef IS_COREFILE_NOTE
4243 #undef IS_SOLARIS_PT_INTERP
4244 #undef INCLUDE_SECTION_IN_SEGMENT
4245 #undef SEGMENT_AFTER_SEGMENT
4246 #undef SEGMENT_OVERLAPS
4250 /* Copy private section information. This copies over the entsize
4251 field, and sometimes the info field. */
4254 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4260 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4262 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4263 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4266 /* Copy over private BFD data if it has not already been copied.
4267 This must be done here, rather than in the copy_private_bfd_data
4268 entry point, because the latter is called after the section
4269 contents have been set, which means that the program headers have
4270 already been worked out. */
4271 if (elf_tdata (obfd
)->segment_map
== NULL
4272 && elf_tdata (ibfd
)->phdr
!= NULL
)
4276 /* Only set up the segments if there are no more SEC_ALLOC
4277 sections. FIXME: This won't do the right thing if objcopy is
4278 used to remove the last SEC_ALLOC section, since objcopy
4279 won't call this routine in that case. */
4280 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4281 if ((s
->flags
& SEC_ALLOC
) != 0)
4285 if (! copy_private_bfd_data (ibfd
, obfd
))
4290 ihdr
= &elf_section_data (isec
)->this_hdr
;
4291 ohdr
= &elf_section_data (osec
)->this_hdr
;
4293 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4295 if (ihdr
->sh_type
== SHT_SYMTAB
4296 || ihdr
->sh_type
== SHT_DYNSYM
4297 || ihdr
->sh_type
== SHT_GNU_verneed
4298 || ihdr
->sh_type
== SHT_GNU_verdef
)
4299 ohdr
->sh_info
= ihdr
->sh_info
;
4301 elf_section_data (osec
)->use_rela_p
4302 = elf_section_data (isec
)->use_rela_p
;
4307 /* Copy private symbol information. If this symbol is in a section
4308 which we did not map into a BFD section, try to map the section
4309 index correctly. We use special macro definitions for the mapped
4310 section indices; these definitions are interpreted by the
4311 swap_out_syms function. */
4313 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4314 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4315 #define MAP_STRTAB (SHN_LORESERVE - 3)
4316 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4319 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4325 elf_symbol_type
*isym
, *osym
;
4327 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4328 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4331 isym
= elf_symbol_from (ibfd
, isymarg
);
4332 osym
= elf_symbol_from (obfd
, osymarg
);
4336 && bfd_is_abs_section (isym
->symbol
.section
))
4340 shndx
= isym
->internal_elf_sym
.st_shndx
;
4341 if (shndx
== elf_onesymtab (ibfd
))
4342 shndx
= MAP_ONESYMTAB
;
4343 else if (shndx
== elf_dynsymtab (ibfd
))
4344 shndx
= MAP_DYNSYMTAB
;
4345 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4347 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4348 shndx
= MAP_SHSTRTAB
;
4349 osym
->internal_elf_sym
.st_shndx
= shndx
;
4355 /* Swap out the symbols. */
4358 swap_out_syms (abfd
, sttp
, relocatable_p
)
4360 struct bfd_strtab_hash
**sttp
;
4363 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4365 if (!elf_map_symbols (abfd
))
4368 /* Dump out the symtabs. */
4370 int symcount
= bfd_get_symcount (abfd
);
4371 asymbol
**syms
= bfd_get_outsymbols (abfd
);
4372 struct bfd_strtab_hash
*stt
;
4373 Elf_Internal_Shdr
*symtab_hdr
;
4374 Elf_Internal_Shdr
*symstrtab_hdr
;
4375 char *outbound_syms
;
4378 stt
= _bfd_elf_stringtab_init ();
4382 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4383 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4384 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4385 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4386 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4387 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4389 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4390 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4392 outbound_syms
= bfd_alloc (abfd
,
4393 (1 + symcount
) * bed
->s
->sizeof_sym
);
4394 if (outbound_syms
== NULL
)
4396 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4398 /* now generate the data (for "contents") */
4400 /* Fill in zeroth symbol and swap it out. */
4401 Elf_Internal_Sym sym
;
4407 sym
.st_shndx
= SHN_UNDEF
;
4408 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4409 outbound_syms
+= bed
->s
->sizeof_sym
;
4411 for (idx
= 0; idx
< symcount
; idx
++)
4413 Elf_Internal_Sym sym
;
4414 bfd_vma value
= syms
[idx
]->value
;
4415 elf_symbol_type
*type_ptr
;
4416 flagword flags
= syms
[idx
]->flags
;
4419 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
4421 /* Local section symbols have no name. */
4426 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4429 if (sym
.st_name
== (unsigned long) -1)
4433 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4435 if ((flags
& BSF_SECTION_SYM
) == 0
4436 && bfd_is_com_section (syms
[idx
]->section
))
4438 /* ELF common symbols put the alignment into the `value' field,
4439 and the size into the `size' field. This is backwards from
4440 how BFD handles it, so reverse it here. */
4441 sym
.st_size
= value
;
4442 if (type_ptr
== NULL
4443 || type_ptr
->internal_elf_sym
.st_value
== 0)
4444 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4446 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4447 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4448 (abfd
, syms
[idx
]->section
);
4452 asection
*sec
= syms
[idx
]->section
;
4455 if (sec
->output_section
)
4457 value
+= sec
->output_offset
;
4458 sec
= sec
->output_section
;
4460 /* Don't add in the section vma for relocatable output. */
4461 if (! relocatable_p
)
4463 sym
.st_value
= value
;
4464 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4466 if (bfd_is_abs_section (sec
)
4468 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4470 /* This symbol is in a real ELF section which we did
4471 not create as a BFD section. Undo the mapping done
4472 by copy_private_symbol_data. */
4473 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4477 shndx
= elf_onesymtab (abfd
);
4480 shndx
= elf_dynsymtab (abfd
);
4483 shndx
= elf_tdata (abfd
)->strtab_section
;
4486 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4494 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4500 /* Writing this would be a hell of a lot easier if
4501 we had some decent documentation on bfd, and
4502 knew what to expect of the library, and what to
4503 demand of applications. For example, it
4504 appears that `objcopy' might not set the
4505 section of a symbol to be a section that is
4506 actually in the output file. */
4507 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4508 BFD_ASSERT (sec2
!= 0);
4509 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4510 BFD_ASSERT (shndx
!= -1);
4514 sym
.st_shndx
= shndx
;
4517 if ((flags
& BSF_FUNCTION
) != 0)
4519 else if ((flags
& BSF_OBJECT
) != 0)
4524 /* Processor-specific types */
4525 if (type_ptr
!= NULL
4526 && bed
->elf_backend_get_symbol_type
)
4527 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4529 if (flags
& BSF_SECTION_SYM
)
4531 if (flags
& BSF_GLOBAL
)
4532 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
4534 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4536 else if (bfd_is_com_section (syms
[idx
]->section
))
4537 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4538 else if (bfd_is_und_section (syms
[idx
]->section
))
4539 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4543 else if (flags
& BSF_FILE
)
4544 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4547 int bind
= STB_LOCAL
;
4549 if (flags
& BSF_LOCAL
)
4551 else if (flags
& BSF_WEAK
)
4553 else if (flags
& BSF_GLOBAL
)
4556 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4559 if (type_ptr
!= NULL
)
4560 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4564 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4565 outbound_syms
+= bed
->s
->sizeof_sym
;
4569 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4570 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4572 symstrtab_hdr
->sh_flags
= 0;
4573 symstrtab_hdr
->sh_addr
= 0;
4574 symstrtab_hdr
->sh_entsize
= 0;
4575 symstrtab_hdr
->sh_link
= 0;
4576 symstrtab_hdr
->sh_info
= 0;
4577 symstrtab_hdr
->sh_addralign
= 1;
4583 /* Return the number of bytes required to hold the symtab vector.
4585 Note that we base it on the count plus 1, since we will null terminate
4586 the vector allocated based on this size. However, the ELF symbol table
4587 always has a dummy entry as symbol #0, so it ends up even. */
4590 _bfd_elf_get_symtab_upper_bound (abfd
)
4595 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4597 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4598 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4604 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4609 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4611 if (elf_dynsymtab (abfd
) == 0)
4613 bfd_set_error (bfd_error_invalid_operation
);
4617 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4618 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4624 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4625 bfd
*abfd ATTRIBUTE_UNUSED
;
4628 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4631 /* Canonicalize the relocs. */
4634 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4643 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4649 tblptr
= section
->relocation
;
4650 for (i
= 0; i
< section
->reloc_count
; i
++)
4651 *relptr
++ = tblptr
++;
4655 return section
->reloc_count
;
4659 _bfd_elf_get_symtab (abfd
, alocation
)
4661 asymbol
**alocation
;
4663 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4664 (abfd
, alocation
, false);
4667 bfd_get_symcount (abfd
) = symcount
;
4672 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4674 asymbol
**alocation
;
4676 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4677 (abfd
, alocation
, true);
4680 /* Return the size required for the dynamic reloc entries. Any
4681 section that was actually installed in the BFD, and has type
4682 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4683 considered to be a dynamic reloc section. */
4686 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4692 if (elf_dynsymtab (abfd
) == 0)
4694 bfd_set_error (bfd_error_invalid_operation
);
4698 ret
= sizeof (arelent
*);
4699 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4700 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4701 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4702 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4703 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4704 * sizeof (arelent
*));
4709 /* Canonicalize the dynamic relocation entries. Note that we return
4710 the dynamic relocations as a single block, although they are
4711 actually associated with particular sections; the interface, which
4712 was designed for SunOS style shared libraries, expects that there
4713 is only one set of dynamic relocs. Any section that was actually
4714 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4715 the dynamic symbol table, is considered to be a dynamic reloc
4719 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4724 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4728 if (elf_dynsymtab (abfd
) == 0)
4730 bfd_set_error (bfd_error_invalid_operation
);
4734 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4736 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4738 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4739 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4740 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4745 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4747 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4749 for (i
= 0; i
< count
; i
++)
4760 /* Read in the version information. */
4763 _bfd_elf_slurp_version_tables (abfd
)
4766 bfd_byte
*contents
= NULL
;
4768 if (elf_dynverdef (abfd
) != 0)
4770 Elf_Internal_Shdr
*hdr
;
4771 Elf_External_Verdef
*everdef
;
4772 Elf_Internal_Verdef
*iverdef
;
4773 Elf_Internal_Verdef
*iverdefarr
;
4774 Elf_Internal_Verdef iverdefmem
;
4776 unsigned int maxidx
;
4778 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4780 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4781 if (contents
== NULL
)
4783 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4784 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4787 /* We know the number of entries in the section but not the maximum
4788 index. Therefore we have to run through all entries and find
4790 everdef
= (Elf_External_Verdef
*) contents
;
4792 for (i
= 0; i
< hdr
->sh_info
; ++i
)
4794 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4796 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
4797 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
4799 everdef
= ((Elf_External_Verdef
*)
4800 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
4803 elf_tdata (abfd
)->verdef
=
4804 ((Elf_Internal_Verdef
*)
4805 bfd_zalloc (abfd
, maxidx
* sizeof (Elf_Internal_Verdef
)));
4806 if (elf_tdata (abfd
)->verdef
== NULL
)
4809 elf_tdata (abfd
)->cverdefs
= maxidx
;
4811 everdef
= (Elf_External_Verdef
*) contents
;
4812 iverdefarr
= elf_tdata (abfd
)->verdef
;
4813 for (i
= 0; i
< hdr
->sh_info
; i
++)
4815 Elf_External_Verdaux
*everdaux
;
4816 Elf_Internal_Verdaux
*iverdaux
;
4819 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4821 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
4822 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
4824 iverdef
->vd_bfd
= abfd
;
4826 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4829 * sizeof (Elf_Internal_Verdaux
))));
4830 if (iverdef
->vd_auxptr
== NULL
)
4833 everdaux
= ((Elf_External_Verdaux
*)
4834 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4835 iverdaux
= iverdef
->vd_auxptr
;
4836 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4838 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4840 iverdaux
->vda_nodename
=
4841 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4842 iverdaux
->vda_name
);
4843 if (iverdaux
->vda_nodename
== NULL
)
4846 if (j
+ 1 < iverdef
->vd_cnt
)
4847 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4849 iverdaux
->vda_nextptr
= NULL
;
4851 everdaux
= ((Elf_External_Verdaux
*)
4852 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4855 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4857 if (i
+ 1 < hdr
->sh_info
)
4858 iverdef
->vd_nextdef
= iverdef
+ 1;
4860 iverdef
->vd_nextdef
= NULL
;
4862 everdef
= ((Elf_External_Verdef
*)
4863 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4870 if (elf_dynverref (abfd
) != 0)
4872 Elf_Internal_Shdr
*hdr
;
4873 Elf_External_Verneed
*everneed
;
4874 Elf_Internal_Verneed
*iverneed
;
4877 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4879 elf_tdata (abfd
)->verref
=
4880 ((Elf_Internal_Verneed
*)
4881 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4882 if (elf_tdata (abfd
)->verref
== NULL
)
4885 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4887 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4888 if (contents
== NULL
)
4890 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4891 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4894 everneed
= (Elf_External_Verneed
*) contents
;
4895 iverneed
= elf_tdata (abfd
)->verref
;
4896 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4898 Elf_External_Vernaux
*evernaux
;
4899 Elf_Internal_Vernaux
*ivernaux
;
4902 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4904 iverneed
->vn_bfd
= abfd
;
4906 iverneed
->vn_filename
=
4907 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4909 if (iverneed
->vn_filename
== NULL
)
4912 iverneed
->vn_auxptr
=
4913 ((Elf_Internal_Vernaux
*)
4915 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4917 evernaux
= ((Elf_External_Vernaux
*)
4918 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4919 ivernaux
= iverneed
->vn_auxptr
;
4920 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4922 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4924 ivernaux
->vna_nodename
=
4925 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4926 ivernaux
->vna_name
);
4927 if (ivernaux
->vna_nodename
== NULL
)
4930 if (j
+ 1 < iverneed
->vn_cnt
)
4931 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4933 ivernaux
->vna_nextptr
= NULL
;
4935 evernaux
= ((Elf_External_Vernaux
*)
4936 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4939 if (i
+ 1 < hdr
->sh_info
)
4940 iverneed
->vn_nextref
= iverneed
+ 1;
4942 iverneed
->vn_nextref
= NULL
;
4944 everneed
= ((Elf_External_Verneed
*)
4945 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4955 if (contents
== NULL
)
4961 _bfd_elf_make_empty_symbol (abfd
)
4964 elf_symbol_type
*newsym
;
4966 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4971 newsym
->symbol
.the_bfd
= abfd
;
4972 return &newsym
->symbol
;
4977 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4978 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4982 bfd_symbol_info (symbol
, ret
);
4985 /* Return whether a symbol name implies a local symbol. Most targets
4986 use this function for the is_local_label_name entry point, but some
4990 _bfd_elf_is_local_label_name (abfd
, name
)
4991 bfd
*abfd ATTRIBUTE_UNUSED
;
4994 /* Normal local symbols start with ``.L''. */
4995 if (name
[0] == '.' && name
[1] == 'L')
4998 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
4999 DWARF debugging symbols starting with ``..''. */
5000 if (name
[0] == '.' && name
[1] == '.')
5003 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5004 emitting DWARF debugging output. I suspect this is actually a
5005 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5006 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5007 underscore to be emitted on some ELF targets). For ease of use,
5008 we treat such symbols as local. */
5009 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5016 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5017 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5018 asymbol
*symbol ATTRIBUTE_UNUSED
;
5025 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5027 enum bfd_architecture arch
;
5028 unsigned long machine
;
5030 /* If this isn't the right architecture for this backend, and this
5031 isn't the generic backend, fail. */
5032 if (arch
!= get_elf_backend_data (abfd
)->arch
5033 && arch
!= bfd_arch_unknown
5034 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5037 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5040 /* Find the function to a particular section and offset,
5041 for error reporting. */
5044 elf_find_function (abfd
, section
, symbols
, offset
,
5045 filename_ptr
, functionname_ptr
)
5046 bfd
*abfd ATTRIBUTE_UNUSED
;
5050 const char **filename_ptr
;
5051 const char **functionname_ptr
;
5053 const char *filename
;
5062 for (p
= symbols
; *p
!= NULL
; p
++)
5066 q
= (elf_symbol_type
*) *p
;
5068 if (bfd_get_section (&q
->symbol
) != section
)
5071 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5076 filename
= bfd_asymbol_name (&q
->symbol
);
5080 if (q
->symbol
.section
== section
5081 && q
->symbol
.value
>= low_func
5082 && q
->symbol
.value
<= offset
)
5084 func
= (asymbol
*) q
;
5085 low_func
= q
->symbol
.value
;
5095 *filename_ptr
= filename
;
5096 if (functionname_ptr
)
5097 *functionname_ptr
= bfd_asymbol_name (func
);
5102 /* Find the nearest line to a particular section and offset,
5103 for error reporting. */
5106 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5107 filename_ptr
, functionname_ptr
, line_ptr
)
5112 const char **filename_ptr
;
5113 const char **functionname_ptr
;
5114 unsigned int *line_ptr
;
5118 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5119 filename_ptr
, functionname_ptr
,
5122 if (!*functionname_ptr
)
5123 elf_find_function (abfd
, section
, symbols
, offset
,
5124 *filename_ptr
? NULL
: filename_ptr
,
5130 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5131 filename_ptr
, functionname_ptr
,
5133 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5135 if (!*functionname_ptr
)
5136 elf_find_function (abfd
, section
, symbols
, offset
,
5137 *filename_ptr
? NULL
: filename_ptr
,
5143 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5144 &found
, filename_ptr
,
5145 functionname_ptr
, line_ptr
,
5146 &elf_tdata (abfd
)->line_info
))
5151 if (symbols
== NULL
)
5154 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5155 filename_ptr
, functionname_ptr
))
5163 _bfd_elf_sizeof_headers (abfd
, reloc
)
5169 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5171 ret
+= get_program_header_size (abfd
);
5176 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5181 bfd_size_type count
;
5183 Elf_Internal_Shdr
*hdr
;
5185 if (! abfd
->output_has_begun
5186 && ! _bfd_elf_compute_section_file_positions
5187 (abfd
, (struct bfd_link_info
*) NULL
))
5190 hdr
= &elf_section_data (section
)->this_hdr
;
5192 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
5194 if (bfd_write (location
, 1, count
, abfd
) != count
)
5201 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5202 bfd
*abfd ATTRIBUTE_UNUSED
;
5203 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5204 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5211 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5214 Elf_Internal_Rel
*dst
;
5220 /* Try to convert a non-ELF reloc into an ELF one. */
5223 _bfd_elf_validate_reloc (abfd
, areloc
)
5227 /* Check whether we really have an ELF howto. */
5229 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5231 bfd_reloc_code_real_type code
;
5232 reloc_howto_type
*howto
;
5234 /* Alien reloc: Try to determine its type to replace it with an
5235 equivalent ELF reloc. */
5237 if (areloc
->howto
->pc_relative
)
5239 switch (areloc
->howto
->bitsize
)
5242 code
= BFD_RELOC_8_PCREL
;
5245 code
= BFD_RELOC_12_PCREL
;
5248 code
= BFD_RELOC_16_PCREL
;
5251 code
= BFD_RELOC_24_PCREL
;
5254 code
= BFD_RELOC_32_PCREL
;
5257 code
= BFD_RELOC_64_PCREL
;
5263 howto
= bfd_reloc_type_lookup (abfd
, code
);
5265 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5267 if (howto
->pcrel_offset
)
5268 areloc
->addend
+= areloc
->address
;
5270 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5275 switch (areloc
->howto
->bitsize
)
5281 code
= BFD_RELOC_14
;
5284 code
= BFD_RELOC_16
;
5287 code
= BFD_RELOC_26
;
5290 code
= BFD_RELOC_32
;
5293 code
= BFD_RELOC_64
;
5299 howto
= bfd_reloc_type_lookup (abfd
, code
);
5303 areloc
->howto
= howto
;
5311 (*_bfd_error_handler
)
5312 (_("%s: unsupported relocation type %s"),
5313 bfd_get_filename (abfd
), areloc
->howto
->name
);
5314 bfd_set_error (bfd_error_bad_value
);
5319 _bfd_elf_close_and_cleanup (abfd
)
5322 if (bfd_get_format (abfd
) == bfd_object
)
5324 if (elf_shstrtab (abfd
) != NULL
)
5325 _bfd_stringtab_free (elf_shstrtab (abfd
));
5328 return _bfd_generic_close_and_cleanup (abfd
);
5331 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5332 in the relocation's offset. Thus we cannot allow any sort of sanity
5333 range-checking to interfere. There is nothing else to do in processing
5336 bfd_reloc_status_type
5337 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5338 bfd
*abfd ATTRIBUTE_UNUSED
;
5339 arelent
*re ATTRIBUTE_UNUSED
;
5340 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5341 PTR data ATTRIBUTE_UNUSED
;
5342 asection
*is ATTRIBUTE_UNUSED
;
5343 bfd
*obfd ATTRIBUTE_UNUSED
;
5344 char **errmsg ATTRIBUTE_UNUSED
;
5346 return bfd_reloc_ok
;
5349 /* Elf core file support. Much of this only works on native
5350 toolchains, since we rely on knowing the
5351 machine-dependent procfs structure in order to pick
5352 out details about the corefile. */
5354 #ifdef HAVE_SYS_PROCFS_H
5355 # include <sys/procfs.h>
5358 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5361 elfcore_make_pid (abfd
)
5364 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5365 + (elf_tdata (abfd
)->core_pid
));
5368 /* If there isn't a section called NAME, make one, using
5369 data from SECT. Note, this function will generate a
5370 reference to NAME, so you shouldn't deallocate or
5374 elfcore_maybe_make_sect (abfd
, name
, sect
)
5381 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5384 sect2
= bfd_make_section (abfd
, name
);
5388 sect2
->_raw_size
= sect
->_raw_size
;
5389 sect2
->filepos
= sect
->filepos
;
5390 sect2
->flags
= sect
->flags
;
5391 sect2
->alignment_power
= sect
->alignment_power
;
5395 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
5396 actually creates up to two pseudosections:
5397 - For the single-threaded case, a section named NAME, unless
5398 such a section already exists.
5399 - For the multi-threaded case, a section named "NAME/PID", where
5400 PID is elfcore_make_pid (abfd).
5401 Both pseudosections have identical contents. */
5403 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
5410 char *threaded_name
;
5413 /* Build the section name. */
5415 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5416 threaded_name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5417 if (threaded_name
== NULL
)
5419 strcpy (threaded_name
, buf
);
5421 sect
= bfd_make_section (abfd
, threaded_name
);
5424 sect
->_raw_size
= size
;
5425 sect
->filepos
= filepos
;
5426 sect
->flags
= SEC_HAS_CONTENTS
;
5427 sect
->alignment_power
= 2;
5429 return elfcore_maybe_make_sect (abfd
, name
, sect
);
5432 /* prstatus_t exists on:
5434 linux 2.[01] + glibc
5438 #if defined (HAVE_PRSTATUS_T)
5439 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
5442 elfcore_grok_prstatus (abfd
, note
)
5444 Elf_Internal_Note
*note
;
5449 if (note
->descsz
== sizeof (prstatus_t
))
5453 raw_size
= sizeof (prstat
.pr_reg
);
5454 offset
= offsetof (prstatus_t
, pr_reg
);
5455 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5457 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5458 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5460 /* pr_who exists on:
5463 pr_who doesn't exist on:
5466 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5467 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5470 #if defined (HAVE_PRSTATUS32_T)
5471 else if (note
->descsz
== sizeof (prstatus32_t
))
5473 /* 64-bit host, 32-bit corefile */
5474 prstatus32_t prstat
;
5476 raw_size
= sizeof (prstat
.pr_reg
);
5477 offset
= offsetof (prstatus32_t
, pr_reg
);
5478 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5480 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5481 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5483 /* pr_who exists on:
5486 pr_who doesn't exist on:
5489 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5490 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5493 #endif /* HAVE_PRSTATUS32_T */
5496 /* Fail - we don't know how to handle any other
5497 note size (ie. data object type). */
5501 /* Make a ".reg/999" section and a ".reg" section. */
5502 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
5503 raw_size
, note
->descpos
+ offset
);
5505 #endif /* defined (HAVE_PRSTATUS_T) */
5507 /* Create a pseudosection containing the exact contents of NOTE. */
5509 elfcore_make_note_pseudosection (abfd
, name
, note
)
5512 Elf_Internal_Note
*note
;
5514 return _bfd_elfcore_make_pseudosection (abfd
, name
,
5515 note
->descsz
, note
->descpos
);
5518 /* There isn't a consistent prfpregset_t across platforms,
5519 but it doesn't matter, because we don't have to pick this
5520 data structure apart. */
5523 elfcore_grok_prfpreg (abfd
, note
)
5525 Elf_Internal_Note
*note
;
5527 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
5530 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5531 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5535 elfcore_grok_prxfpreg (abfd
, note
)
5537 Elf_Internal_Note
*note
;
5539 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
5542 #if defined (HAVE_PRPSINFO_T)
5543 typedef prpsinfo_t elfcore_psinfo_t
;
5544 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5545 typedef prpsinfo32_t elfcore_psinfo32_t
;
5549 #if defined (HAVE_PSINFO_T)
5550 typedef psinfo_t elfcore_psinfo_t
;
5551 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5552 typedef psinfo32_t elfcore_psinfo32_t
;
5556 /* return a malloc'ed copy of a string at START which is at
5557 most MAX bytes long, possibly without a terminating '\0'.
5558 the copy will always have a terminating '\0'. */
5561 _bfd_elfcore_strndup (abfd
, start
, max
)
5567 char *end
= memchr (start
, '\0', max
);
5575 dup
= bfd_alloc (abfd
, len
+ 1);
5579 memcpy (dup
, start
, len
);
5585 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5586 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
5589 elfcore_grok_psinfo (abfd
, note
)
5591 Elf_Internal_Note
*note
;
5593 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
5595 elfcore_psinfo_t psinfo
;
5597 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5599 elf_tdata (abfd
)->core_program
5600 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5601 sizeof (psinfo
.pr_fname
));
5603 elf_tdata (abfd
)->core_command
5604 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5605 sizeof (psinfo
.pr_psargs
));
5607 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5608 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
5610 /* 64-bit host, 32-bit corefile */
5611 elfcore_psinfo32_t psinfo
;
5613 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5615 elf_tdata (abfd
)->core_program
5616 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5617 sizeof (psinfo
.pr_fname
));
5619 elf_tdata (abfd
)->core_command
5620 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5621 sizeof (psinfo
.pr_psargs
));
5627 /* Fail - we don't know how to handle any other
5628 note size (ie. data object type). */
5632 /* Note that for some reason, a spurious space is tacked
5633 onto the end of the args in some (at least one anyway)
5634 implementations, so strip it off if it exists. */
5637 char *command
= elf_tdata (abfd
)->core_command
;
5638 int n
= strlen (command
);
5640 if (0 < n
&& command
[n
- 1] == ' ')
5641 command
[n
- 1] = '\0';
5646 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5648 #if defined (HAVE_PSTATUS_T)
5650 elfcore_grok_pstatus (abfd
, note
)
5652 Elf_Internal_Note
*note
;
5654 if (note
->descsz
== sizeof (pstatus_t
)
5655 #if defined (HAVE_PXSTATUS_T)
5656 || note
->descsz
== sizeof (pxstatus_t
)
5662 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5664 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5666 #if defined (HAVE_PSTATUS32_T)
5667 else if (note
->descsz
== sizeof (pstatus32_t
))
5669 /* 64-bit host, 32-bit corefile */
5672 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5674 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5677 /* Could grab some more details from the "representative"
5678 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5679 NT_LWPSTATUS note, presumably. */
5683 #endif /* defined (HAVE_PSTATUS_T) */
5685 #if defined (HAVE_LWPSTATUS_T)
5687 elfcore_grok_lwpstatus (abfd
, note
)
5689 Elf_Internal_Note
*note
;
5691 lwpstatus_t lwpstat
;
5696 if (note
->descsz
!= sizeof (lwpstat
)
5697 #if defined (HAVE_LWPXSTATUS_T)
5698 && note
->descsz
!= sizeof (lwpxstatus_t
)
5703 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5705 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5706 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5708 /* Make a ".reg/999" section. */
5710 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5711 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5716 sect
= bfd_make_section (abfd
, name
);
5720 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5721 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5722 sect
->filepos
= note
->descpos
5723 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5726 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5727 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5728 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5731 sect
->flags
= SEC_HAS_CONTENTS
;
5732 sect
->alignment_power
= 2;
5734 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5737 /* Make a ".reg2/999" section */
5739 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5740 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5745 sect
= bfd_make_section (abfd
, name
);
5749 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5750 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5751 sect
->filepos
= note
->descpos
5752 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5755 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5756 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5757 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5760 sect
->flags
= SEC_HAS_CONTENTS
;
5761 sect
->alignment_power
= 2;
5763 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
5765 #endif /* defined (HAVE_LWPSTATUS_T) */
5767 #if defined (HAVE_WIN32_PSTATUS_T)
5769 elfcore_grok_win32pstatus (abfd
, note
)
5771 Elf_Internal_Note
*note
;
5776 win32_pstatus_t pstatus
;
5778 if (note
->descsz
< sizeof (pstatus
))
5781 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
5783 switch (pstatus
.data_type
)
5785 case NOTE_INFO_PROCESS
:
5786 /* FIXME: need to add ->core_command. */
5787 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
5788 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
5791 case NOTE_INFO_THREAD
:
5792 /* Make a ".reg/999" section. */
5793 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
5795 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5801 sect
= bfd_make_section (abfd
, name
);
5805 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
5806 sect
->filepos
= note
->descpos
+ offsetof (struct win32_pstatus
,
5807 data
.thread_info
.thread_context
);
5808 sect
->flags
= SEC_HAS_CONTENTS
;
5809 sect
->alignment_power
= 2;
5811 if (pstatus
.data
.thread_info
.is_active_thread
)
5812 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5816 case NOTE_INFO_MODULE
:
5817 /* Make a ".module/xxxxxxxx" section. */
5818 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
5820 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5826 sect
= bfd_make_section (abfd
, name
);
5831 sect
->_raw_size
= note
->descsz
;
5832 sect
->filepos
= note
->descpos
;
5833 sect
->flags
= SEC_HAS_CONTENTS
;
5834 sect
->alignment_power
= 2;
5843 #endif /* HAVE_WIN32_PSTATUS_T */
5846 elfcore_grok_note (abfd
, note
)
5848 Elf_Internal_Note
*note
;
5850 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5858 if (bed
->elf_backend_grok_prstatus
)
5859 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
5861 #if defined (HAVE_PRSTATUS_T)
5862 return elfcore_grok_prstatus (abfd
, note
);
5867 #if defined (HAVE_PSTATUS_T)
5869 return elfcore_grok_pstatus (abfd
, note
);
5872 #if defined (HAVE_LWPSTATUS_T)
5874 return elfcore_grok_lwpstatus (abfd
, note
);
5877 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5878 return elfcore_grok_prfpreg (abfd
, note
);
5880 #if defined (HAVE_WIN32_PSTATUS_T)
5881 case NT_WIN32PSTATUS
:
5882 return elfcore_grok_win32pstatus (abfd
, note
);
5885 case NT_PRXFPREG
: /* Linux SSE extension */
5886 if (note
->namesz
== 5
5887 && ! strcmp (note
->namedata
, "LINUX"))
5888 return elfcore_grok_prxfpreg (abfd
, note
);
5894 if (bed
->elf_backend_grok_psinfo
)
5895 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
5897 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5898 return elfcore_grok_psinfo (abfd
, note
);
5906 elfcore_read_notes (abfd
, offset
, size
)
5917 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5920 buf
= bfd_malloc ((size_t) size
);
5924 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5932 while (p
< buf
+ size
)
5934 /* FIXME: bad alignment assumption. */
5935 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
5936 Elf_Internal_Note in
;
5938 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5940 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5941 in
.namedata
= xnp
->name
;
5943 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5944 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5945 in
.descpos
= offset
+ (in
.descdata
- buf
);
5947 if (! elfcore_grok_note (abfd
, &in
))
5950 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5957 /* Providing external access to the ELF program header table. */
5959 /* Return an upper bound on the number of bytes required to store a
5960 copy of ABFD's program header table entries. Return -1 if an error
5961 occurs; bfd_get_error will return an appropriate code. */
5964 bfd_get_elf_phdr_upper_bound (abfd
)
5967 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5969 bfd_set_error (bfd_error_wrong_format
);
5973 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
5976 /* Copy ABFD's program header table entries to *PHDRS. The entries
5977 will be stored as an array of Elf_Internal_Phdr structures, as
5978 defined in include/elf/internal.h. To find out how large the
5979 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5981 Return the number of program header table entries read, or -1 if an
5982 error occurs; bfd_get_error will return an appropriate code. */
5985 bfd_get_elf_phdrs (abfd
, phdrs
)
5991 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5993 bfd_set_error (bfd_error_wrong_format
);
5997 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
5998 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
5999 num_phdrs
* sizeof (Elf_Internal_Phdr
));
6005 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
6006 bfd
*abfd ATTRIBUTE_UNUSED
;
6011 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6013 i_ehdrp
= elf_elfheader (abfd
);
6014 if (i_ehdrp
== NULL
)
6015 sprintf_vma (buf
, value
);
6018 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6020 #if BFD_HOST_64BIT_LONG
6021 sprintf (buf
, "%016lx", value
);
6023 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
6024 _bfd_int64_low (value
));
6028 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
6031 sprintf_vma (buf
, value
);
6036 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
6037 bfd
*abfd ATTRIBUTE_UNUSED
;
6042 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6044 i_ehdrp
= elf_elfheader (abfd
);
6045 if (i_ehdrp
== NULL
)
6046 fprintf_vma ((FILE *) stream
, value
);
6049 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6051 #if BFD_HOST_64BIT_LONG
6052 fprintf ((FILE *) stream
, "%016lx", value
);
6054 fprintf ((FILE *) stream
, "%08lx%08lx",
6055 _bfd_int64_high (value
), _bfd_int64_low (value
));
6059 fprintf ((FILE *) stream
, "%08lx",
6060 (unsigned long) (value
& 0xffffffff));
6063 fprintf_vma ((FILE *) stream
, value
);
6067 enum elf_reloc_type_class
6068 _bfd_elf_reloc_type_class (type
)
6069 int type ATTRIBUTE_UNUSED
;
6071 return reloc_class_normal
;