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
;
3351 /* There used to be a long list of cases here, each one setting
3352 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
3353 in the corresponding bfd definition. To avoid duplication,
3354 the switch was removed. Machines that need special handling
3355 can generally do it in elf_backend_final_write_processing(),
3356 unless they need the information earlier than the final write.
3357 Such need can generally be supplied by replacing the tests for
3358 e_machine with the conditions used to determine it. */
3360 if (get_elf_backend_data (abfd
) != NULL
)
3361 i_ehdrp
->e_machine
= get_elf_backend_data (abfd
)->elf_machine_code
;
3363 i_ehdrp
->e_machine
= EM_NONE
;
3366 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3367 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3369 /* No program header, for now. */
3370 i_ehdrp
->e_phoff
= 0;
3371 i_ehdrp
->e_phentsize
= 0;
3372 i_ehdrp
->e_phnum
= 0;
3374 /* Each bfd section is section header entry. */
3375 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3376 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3378 /* If we're building an executable, we'll need a program header table. */
3379 if (abfd
->flags
& EXEC_P
)
3381 /* It all happens later. */
3383 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3385 /* elf_build_phdrs() returns a (NULL-terminated) array of
3386 Elf_Internal_Phdrs. */
3387 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3388 i_ehdrp
->e_phoff
= outbase
;
3389 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3394 i_ehdrp
->e_phentsize
= 0;
3396 i_ehdrp
->e_phoff
= 0;
3399 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3400 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3401 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3402 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3403 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3404 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3405 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3406 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3407 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3413 /* Assign file positions for all the reloc sections which are not part
3414 of the loadable file image. */
3417 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3422 Elf_Internal_Shdr
**shdrpp
;
3424 off
= elf_tdata (abfd
)->next_file_pos
;
3426 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3427 i
< elf_elfheader (abfd
)->e_shnum
;
3430 Elf_Internal_Shdr
*shdrp
;
3433 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3434 && shdrp
->sh_offset
== -1)
3435 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3438 elf_tdata (abfd
)->next_file_pos
= off
;
3442 _bfd_elf_write_object_contents (abfd
)
3445 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3446 Elf_Internal_Ehdr
*i_ehdrp
;
3447 Elf_Internal_Shdr
**i_shdrp
;
3451 if (! abfd
->output_has_begun
3452 && ! _bfd_elf_compute_section_file_positions
3453 (abfd
, (struct bfd_link_info
*) NULL
))
3456 i_shdrp
= elf_elfsections (abfd
);
3457 i_ehdrp
= elf_elfheader (abfd
);
3460 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3464 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3466 /* After writing the headers, we need to write the sections too... */
3467 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3469 if (bed
->elf_backend_section_processing
)
3470 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3471 if (i_shdrp
[count
]->contents
)
3473 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3474 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3476 != i_shdrp
[count
]->sh_size
))
3481 /* Write out the section header names. */
3482 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3483 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3486 if (bed
->elf_backend_final_write_processing
)
3487 (*bed
->elf_backend_final_write_processing
) (abfd
,
3488 elf_tdata (abfd
)->linker
);
3490 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3494 _bfd_elf_write_corefile_contents (abfd
)
3497 /* Hopefully this can be done just like an object file. */
3498 return _bfd_elf_write_object_contents (abfd
);
3501 /* Given a section, search the header to find them. */
3504 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3508 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3509 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3511 Elf_Internal_Shdr
*hdr
;
3512 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3514 for (index
= 0; index
< maxindex
; index
++)
3516 hdr
= i_shdrp
[index
];
3517 if (hdr
->bfd_section
== asect
)
3521 if (bed
->elf_backend_section_from_bfd_section
)
3523 for (index
= 0; index
< maxindex
; index
++)
3527 hdr
= i_shdrp
[index
];
3529 if ((*bed
->elf_backend_section_from_bfd_section
)
3530 (abfd
, hdr
, asect
, &retval
))
3535 if (bfd_is_abs_section (asect
))
3537 if (bfd_is_com_section (asect
))
3539 if (bfd_is_und_section (asect
))
3542 bfd_set_error (bfd_error_nonrepresentable_section
);
3547 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3551 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3553 asymbol
**asym_ptr_ptr
;
3555 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3557 flagword flags
= asym_ptr
->flags
;
3559 /* When gas creates relocations against local labels, it creates its
3560 own symbol for the section, but does put the symbol into the
3561 symbol chain, so udata is 0. When the linker is generating
3562 relocatable output, this section symbol may be for one of the
3563 input sections rather than the output section. */
3564 if (asym_ptr
->udata
.i
== 0
3565 && (flags
& BSF_SECTION_SYM
)
3566 && asym_ptr
->section
)
3570 if (asym_ptr
->section
->output_section
!= NULL
)
3571 indx
= asym_ptr
->section
->output_section
->index
;
3573 indx
= asym_ptr
->section
->index
;
3574 if (indx
< elf_num_section_syms (abfd
)
3575 && elf_section_syms (abfd
)[indx
] != NULL
)
3576 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3579 idx
= asym_ptr
->udata
.i
;
3583 /* This case can occur when using --strip-symbol on a symbol
3584 which is used in a relocation entry. */
3585 (*_bfd_error_handler
)
3586 (_("%s: symbol `%s' required but not present"),
3587 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3588 bfd_set_error (bfd_error_no_symbols
);
3595 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3596 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3597 elf_symbol_flags (flags
));
3605 /* Copy private BFD data. This copies any program header information. */
3608 copy_private_bfd_data (ibfd
, obfd
)
3612 Elf_Internal_Ehdr
* iehdr
;
3613 struct elf_segment_map
* map
;
3614 struct elf_segment_map
* map_first
;
3615 struct elf_segment_map
** pointer_to_map
;
3616 Elf_Internal_Phdr
* segment
;
3619 unsigned int num_segments
;
3620 boolean phdr_included
= false;
3621 bfd_vma maxpagesize
;
3622 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
3623 unsigned int phdr_adjust_num
= 0;
3625 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3626 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3629 if (elf_tdata (ibfd
)->phdr
== NULL
)
3632 iehdr
= elf_elfheader (ibfd
);
3635 pointer_to_map
= &map_first
;
3637 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3638 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3640 /* Returns the end address of the segment + 1. */
3641 #define SEGMENT_END(segment, start) \
3642 (start + (segment->p_memsz > segment->p_filesz \
3643 ? segment->p_memsz : segment->p_filesz))
3645 /* Returns true if the given section is contained within
3646 the given segment. VMA addresses are compared. */
3647 #define IS_CONTAINED_BY_VMA(section, segment) \
3648 (section->vma >= segment->p_vaddr \
3649 && (section->vma + section->_raw_size) \
3650 <= (SEGMENT_END (segment, segment->p_vaddr)))
3652 /* Returns true if the given section is contained within
3653 the given segment. LMA addresses are compared. */
3654 #define IS_CONTAINED_BY_LMA(section, segment, base) \
3655 (section->lma >= base \
3656 && (section->lma + section->_raw_size) \
3657 <= SEGMENT_END (segment, base))
3659 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3660 #define IS_COREFILE_NOTE(p, s) \
3661 (p->p_type == PT_NOTE \
3662 && bfd_get_format (ibfd) == bfd_core \
3663 && s->vma == 0 && s->lma == 0 \
3664 && (bfd_vma) s->filepos >= p->p_offset \
3665 && (bfd_vma) s->filepos + s->_raw_size \
3666 <= p->p_offset + p->p_filesz)
3668 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3669 linker, which generates a PT_INTERP section with p_vaddr and
3670 p_memsz set to 0. */
3671 #define IS_SOLARIS_PT_INTERP(p, s) \
3673 && p->p_filesz > 0 \
3674 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3675 && s->_raw_size > 0 \
3676 && (bfd_vma) s->filepos >= p->p_offset \
3677 && ((bfd_vma) s->filepos + s->_raw_size \
3678 <= p->p_offset + p->p_filesz))
3680 /* Decide if the given section should be included in the given segment.
3681 A section will be included if:
3682 1. It is within the address space of the segment,
3683 2. It is an allocated segment,
3684 3. There is an output section associated with it,
3685 4. The section has not already been allocated to a previous segment. */
3686 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
3687 ((((IS_CONTAINED_BY_VMA (section, segment) \
3688 || IS_SOLARIS_PT_INTERP (segment, section)) \
3689 && (section->flags & SEC_ALLOC) != 0) \
3690 || IS_COREFILE_NOTE (segment, section)) \
3691 && section->output_section != NULL \
3692 && section->segment_mark == false)
3694 /* Returns true iff seg1 starts after the end of seg2. */
3695 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
3696 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
3698 /* Returns true iff seg1 and seg2 overlap. */
3699 #define SEGMENT_OVERLAPS(seg1, seg2) \
3700 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
3702 /* Initialise the segment mark field. */
3703 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3704 section
->segment_mark
= false;
3706 /* Scan through the segments specified in the program header
3707 of the input BFD. For this first scan we look for overlaps
3708 in the loadable segments. These can be created by wierd
3709 parameters to objcopy. */
3710 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3715 Elf_Internal_Phdr
*segment2
;
3717 if (segment
->p_type
!= PT_LOAD
)
3720 /* Determine if this segment overlaps any previous segments. */
3721 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
3723 bfd_signed_vma extra_length
;
3725 if (segment2
->p_type
!= PT_LOAD
3726 || ! SEGMENT_OVERLAPS (segment
, segment2
))
3729 /* Merge the two segments together. */
3730 if (segment2
->p_vaddr
< segment
->p_vaddr
)
3732 /* Extend SEGMENT2 to include SEGMENT and then delete
3735 SEGMENT_END (segment
, segment
->p_vaddr
)
3736 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
3738 if (extra_length
> 0)
3740 segment2
->p_memsz
+= extra_length
;
3741 segment2
->p_filesz
+= extra_length
;
3744 segment
->p_type
= PT_NULL
;
3746 /* Since we have deleted P we must restart the outer loop. */
3748 segment
= elf_tdata (ibfd
)->phdr
;
3753 /* Extend SEGMENT to include SEGMENT2 and then delete
3756 SEGMENT_END (segment2
, segment2
->p_vaddr
)
3757 - SEGMENT_END (segment
, segment
->p_vaddr
);
3759 if (extra_length
> 0)
3761 segment
->p_memsz
+= extra_length
;
3762 segment
->p_filesz
+= extra_length
;
3765 segment2
->p_type
= PT_NULL
;
3770 /* The second scan attempts to assign sections to segments. */
3771 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3775 unsigned int section_count
;
3776 asection
** sections
;
3777 asection
* output_section
;
3779 bfd_vma matching_lma
;
3780 bfd_vma suggested_lma
;
3783 if (segment
->p_type
== PT_NULL
)
3786 /* Compute how many sections might be placed into this segment. */
3788 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3789 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3792 /* Allocate a segment map big enough to contain all of the
3793 sections we have selected. */
3794 map
= ((struct elf_segment_map
*)
3796 (sizeof (struct elf_segment_map
)
3797 + ((size_t) section_count
- 1) * sizeof (asection
*))));
3801 /* Initialise the fields of the segment map. Default to
3802 using the physical address of the segment in the input BFD. */
3804 map
->p_type
= segment
->p_type
;
3805 map
->p_flags
= segment
->p_flags
;
3806 map
->p_flags_valid
= 1;
3807 map
->p_paddr
= segment
->p_paddr
;
3808 map
->p_paddr_valid
= 1;
3810 /* Determine if this segment contains the ELF file header
3811 and if it contains the program headers themselves. */
3812 map
->includes_filehdr
= (segment
->p_offset
== 0
3813 && segment
->p_filesz
>= iehdr
->e_ehsize
);
3815 map
->includes_phdrs
= 0;
3817 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
3819 map
->includes_phdrs
=
3820 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3821 && (segment
->p_offset
+ segment
->p_filesz
3822 >= ((bfd_vma
) iehdr
->e_phoff
3823 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3825 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
3826 phdr_included
= true;
3829 if (section_count
== 0)
3831 /* Special segments, such as the PT_PHDR segment, may contain
3832 no sections, but ordinary, loadable segments should contain
3834 if (segment
->p_type
== PT_LOAD
)
3836 (_("%s: warning: Empty loadable segment detected\n"),
3837 bfd_get_filename (ibfd
));
3840 *pointer_to_map
= map
;
3841 pointer_to_map
= &map
->next
;
3846 /* Now scan the sections in the input BFD again and attempt
3847 to add their corresponding output sections to the segment map.
3848 The problem here is how to handle an output section which has
3849 been moved (ie had its LMA changed). There are four possibilities:
3851 1. None of the sections have been moved.
3852 In this case we can continue to use the segment LMA from the
3855 2. All of the sections have been moved by the same amount.
3856 In this case we can change the segment's LMA to match the LMA
3857 of the first section.
3859 3. Some of the sections have been moved, others have not.
3860 In this case those sections which have not been moved can be
3861 placed in the current segment which will have to have its size,
3862 and possibly its LMA changed, and a new segment or segments will
3863 have to be created to contain the other sections.
3865 4. The sections have been moved, but not be the same amount.
3866 In this case we can change the segment's LMA to match the LMA
3867 of the first section and we will have to create a new segment
3868 or segments to contain the other sections.
3870 In order to save time, we allocate an array to hold the section
3871 pointers that we are interested in. As these sections get assigned
3872 to a segment, they are removed from this array. */
3874 sections
= (asection
**) bfd_malloc
3875 (sizeof (asection
*) * section_count
);
3876 if (sections
== NULL
)
3879 /* Step One: Scan for segment vs section LMA conflicts.
3880 Also add the sections to the section array allocated above.
3881 Also add the sections to the current segment. In the common
3882 case, where the sections have not been moved, this means that
3883 we have completely filled the segment, and there is nothing
3889 for (j
= 0, section
= ibfd
->sections
;
3891 section
= section
->next
)
3893 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3895 output_section
= section
->output_section
;
3897 sections
[j
++] = section
;
3899 /* The Solaris native linker always sets p_paddr to 0.
3900 We try to catch that case here, and set it to the
3902 if (segment
->p_paddr
== 0
3903 && segment
->p_vaddr
!= 0
3905 && output_section
->lma
!= 0
3906 && (output_section
->vma
== (segment
->p_vaddr
3907 + (map
->includes_filehdr
3910 + (map
->includes_phdrs
3911 ? iehdr
->e_phnum
* iehdr
->e_phentsize
3913 map
->p_paddr
= segment
->p_vaddr
;
3915 /* Match up the physical address of the segment with the
3916 LMA address of the output section. */
3917 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
3918 || IS_COREFILE_NOTE (segment
, section
))
3920 if (matching_lma
== 0)
3921 matching_lma
= output_section
->lma
;
3923 /* We assume that if the section fits within the segment
3924 then it does not overlap any other section within that
3926 map
->sections
[isec
++] = output_section
;
3928 else if (suggested_lma
== 0)
3929 suggested_lma
= output_section
->lma
;
3933 BFD_ASSERT (j
== section_count
);
3935 /* Step Two: Adjust the physical address of the current segment,
3937 if (isec
== section_count
)
3939 /* All of the sections fitted within the segment as currently
3940 specified. This is the default case. Add the segment to
3941 the list of built segments and carry on to process the next
3942 program header in the input BFD. */
3943 map
->count
= section_count
;
3944 *pointer_to_map
= map
;
3945 pointer_to_map
= &map
->next
;
3952 if (matching_lma
!= 0)
3954 /* At least one section fits inside the current segment.
3955 Keep it, but modify its physical address to match the
3956 LMA of the first section that fitted. */
3957 map
->p_paddr
= matching_lma
;
3961 /* None of the sections fitted inside the current segment.
3962 Change the current segment's physical address to match
3963 the LMA of the first section. */
3964 map
->p_paddr
= suggested_lma
;
3967 /* Offset the segment physical address from the lma
3968 to allow for space taken up by elf headers. */
3969 if (map
->includes_filehdr
)
3970 map
->p_paddr
-= iehdr
->e_ehsize
;
3972 if (map
->includes_phdrs
)
3974 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
3976 /* iehdr->e_phnum is just an estimate of the number
3977 of program headers that we will need. Make a note
3978 here of the number we used and the segment we chose
3979 to hold these headers, so that we can adjust the
3980 offset when we know the correct value. */
3981 phdr_adjust_num
= iehdr
->e_phnum
;
3982 phdr_adjust_seg
= map
;
3986 /* Step Three: Loop over the sections again, this time assigning
3987 those that fit to the current segment and remvoing them from the
3988 sections array; but making sure not to leave large gaps. Once all
3989 possible sections have been assigned to the current segment it is
3990 added to the list of built segments and if sections still remain
3991 to be assigned, a new segment is constructed before repeating
3999 /* Fill the current segment with sections that fit. */
4000 for (j
= 0; j
< section_count
; j
++)
4002 section
= sections
[j
];
4004 if (section
== NULL
)
4007 output_section
= section
->output_section
;
4009 BFD_ASSERT (output_section
!= NULL
);
4011 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4012 || IS_COREFILE_NOTE (segment
, section
))
4014 if (map
->count
== 0)
4016 /* If the first section in a segment does not start at
4017 the beginning of the segment, then something is
4019 if (output_section
->lma
!=
4021 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4022 + (map
->includes_phdrs
4023 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4029 asection
* prev_sec
;
4031 prev_sec
= map
->sections
[map
->count
- 1];
4033 /* If the gap between the end of the previous section
4034 and the start of this section is more than
4035 maxpagesize then we need to start a new segment. */
4036 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
4037 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4038 || ((prev_sec
->lma
+ prev_sec
->_raw_size
) > output_section
->lma
))
4040 if (suggested_lma
== 0)
4041 suggested_lma
= output_section
->lma
;
4047 map
->sections
[map
->count
++] = output_section
;
4050 section
->segment_mark
= true;
4052 else if (suggested_lma
== 0)
4053 suggested_lma
= output_section
->lma
;
4056 BFD_ASSERT (map
->count
> 0);
4058 /* Add the current segment to the list of built segments. */
4059 *pointer_to_map
= map
;
4060 pointer_to_map
= &map
->next
;
4062 if (isec
< section_count
)
4064 /* We still have not allocated all of the sections to
4065 segments. Create a new segment here, initialise it
4066 and carry on looping. */
4067 map
= ((struct elf_segment_map
*)
4069 (sizeof (struct elf_segment_map
)
4070 + ((size_t) section_count
- 1)
4071 * sizeof (asection
*))));
4075 /* Initialise the fields of the segment map. Set the physical
4076 physical address to the LMA of the first section that has
4077 not yet been assigned. */
4079 map
->p_type
= segment
->p_type
;
4080 map
->p_flags
= segment
->p_flags
;
4081 map
->p_flags_valid
= 1;
4082 map
->p_paddr
= suggested_lma
;
4083 map
->p_paddr_valid
= 1;
4084 map
->includes_filehdr
= 0;
4085 map
->includes_phdrs
= 0;
4088 while (isec
< section_count
);
4093 /* The Solaris linker creates program headers in which all the
4094 p_paddr fields are zero. When we try to objcopy or strip such a
4095 file, we get confused. Check for this case, and if we find it
4096 reset the p_paddr_valid fields. */
4097 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4098 if (map
->p_paddr
!= 0)
4102 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4103 map
->p_paddr_valid
= 0;
4106 elf_tdata (obfd
)->segment_map
= map_first
;
4108 /* If we had to estimate the number of program headers that were
4109 going to be needed, then check our estimate know and adjust
4110 the offset if necessary. */
4111 if (phdr_adjust_seg
!= NULL
)
4115 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4118 if (count
> phdr_adjust_num
)
4119 phdr_adjust_seg
->p_paddr
4120 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4124 /* Final Step: Sort the segments into ascending order of physical
4126 if (map_first
!= NULL
)
4128 struct elf_segment_map
*prev
;
4131 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4133 /* Yes I know - its a bubble sort.... */
4134 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4136 /* Swap map and map->next. */
4137 prev
->next
= map
->next
;
4138 map
->next
= map
->next
->next
;
4139 prev
->next
->next
= map
;
4149 #undef IS_CONTAINED_BY_VMA
4150 #undef IS_CONTAINED_BY_LMA
4151 #undef IS_COREFILE_NOTE
4152 #undef IS_SOLARIS_PT_INTERP
4153 #undef INCLUDE_SECTION_IN_SEGMENT
4154 #undef SEGMENT_AFTER_SEGMENT
4155 #undef SEGMENT_OVERLAPS
4159 /* Copy private section information. This copies over the entsize
4160 field, and sometimes the info field. */
4163 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4169 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4171 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4172 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4175 /* Copy over private BFD data if it has not already been copied.
4176 This must be done here, rather than in the copy_private_bfd_data
4177 entry point, because the latter is called after the section
4178 contents have been set, which means that the program headers have
4179 already been worked out. */
4180 if (elf_tdata (obfd
)->segment_map
== NULL
4181 && elf_tdata (ibfd
)->phdr
!= NULL
)
4185 /* Only set up the segments if there are no more SEC_ALLOC
4186 sections. FIXME: This won't do the right thing if objcopy is
4187 used to remove the last SEC_ALLOC section, since objcopy
4188 won't call this routine in that case. */
4189 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4190 if ((s
->flags
& SEC_ALLOC
) != 0)
4194 if (! copy_private_bfd_data (ibfd
, obfd
))
4199 ihdr
= &elf_section_data (isec
)->this_hdr
;
4200 ohdr
= &elf_section_data (osec
)->this_hdr
;
4202 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4204 if (ihdr
->sh_type
== SHT_SYMTAB
4205 || ihdr
->sh_type
== SHT_DYNSYM
4206 || ihdr
->sh_type
== SHT_GNU_verneed
4207 || ihdr
->sh_type
== SHT_GNU_verdef
)
4208 ohdr
->sh_info
= ihdr
->sh_info
;
4210 elf_section_data (osec
)->use_rela_p
4211 = elf_section_data (isec
)->use_rela_p
;
4216 /* Copy private symbol information. If this symbol is in a section
4217 which we did not map into a BFD section, try to map the section
4218 index correctly. We use special macro definitions for the mapped
4219 section indices; these definitions are interpreted by the
4220 swap_out_syms function. */
4222 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4223 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4224 #define MAP_STRTAB (SHN_LORESERVE - 3)
4225 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4228 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4234 elf_symbol_type
*isym
, *osym
;
4236 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4237 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4240 isym
= elf_symbol_from (ibfd
, isymarg
);
4241 osym
= elf_symbol_from (obfd
, osymarg
);
4245 && bfd_is_abs_section (isym
->symbol
.section
))
4249 shndx
= isym
->internal_elf_sym
.st_shndx
;
4250 if (shndx
== elf_onesymtab (ibfd
))
4251 shndx
= MAP_ONESYMTAB
;
4252 else if (shndx
== elf_dynsymtab (ibfd
))
4253 shndx
= MAP_DYNSYMTAB
;
4254 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4256 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4257 shndx
= MAP_SHSTRTAB
;
4258 osym
->internal_elf_sym
.st_shndx
= shndx
;
4264 /* Swap out the symbols. */
4267 swap_out_syms (abfd
, sttp
, relocatable_p
)
4269 struct bfd_strtab_hash
**sttp
;
4272 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4274 if (!elf_map_symbols (abfd
))
4277 /* Dump out the symtabs. */
4279 int symcount
= bfd_get_symcount (abfd
);
4280 asymbol
**syms
= bfd_get_outsymbols (abfd
);
4281 struct bfd_strtab_hash
*stt
;
4282 Elf_Internal_Shdr
*symtab_hdr
;
4283 Elf_Internal_Shdr
*symstrtab_hdr
;
4284 char *outbound_syms
;
4287 stt
= _bfd_elf_stringtab_init ();
4291 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4292 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4293 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4294 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4295 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4296 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4298 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4299 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4301 outbound_syms
= bfd_alloc (abfd
,
4302 (1 + symcount
) * bed
->s
->sizeof_sym
);
4303 if (outbound_syms
== NULL
)
4305 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4307 /* now generate the data (for "contents") */
4309 /* Fill in zeroth symbol and swap it out. */
4310 Elf_Internal_Sym sym
;
4316 sym
.st_shndx
= SHN_UNDEF
;
4317 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4318 outbound_syms
+= bed
->s
->sizeof_sym
;
4320 for (idx
= 0; idx
< symcount
; idx
++)
4322 Elf_Internal_Sym sym
;
4323 bfd_vma value
= syms
[idx
]->value
;
4324 elf_symbol_type
*type_ptr
;
4325 flagword flags
= syms
[idx
]->flags
;
4328 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
4330 /* Local section symbols have no name. */
4335 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4338 if (sym
.st_name
== (unsigned long) -1)
4342 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4344 if ((flags
& BSF_SECTION_SYM
) == 0
4345 && bfd_is_com_section (syms
[idx
]->section
))
4347 /* ELF common symbols put the alignment into the `value' field,
4348 and the size into the `size' field. This is backwards from
4349 how BFD handles it, so reverse it here. */
4350 sym
.st_size
= value
;
4351 if (type_ptr
== NULL
4352 || type_ptr
->internal_elf_sym
.st_value
== 0)
4353 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4355 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4356 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4357 (abfd
, syms
[idx
]->section
);
4361 asection
*sec
= syms
[idx
]->section
;
4364 if (sec
->output_section
)
4366 value
+= sec
->output_offset
;
4367 sec
= sec
->output_section
;
4369 /* Don't add in the section vma for relocatable output. */
4370 if (! relocatable_p
)
4372 sym
.st_value
= value
;
4373 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4375 if (bfd_is_abs_section (sec
)
4377 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4379 /* This symbol is in a real ELF section which we did
4380 not create as a BFD section. Undo the mapping done
4381 by copy_private_symbol_data. */
4382 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4386 shndx
= elf_onesymtab (abfd
);
4389 shndx
= elf_dynsymtab (abfd
);
4392 shndx
= elf_tdata (abfd
)->strtab_section
;
4395 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4403 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4409 /* Writing this would be a hell of a lot easier if
4410 we had some decent documentation on bfd, and
4411 knew what to expect of the library, and what to
4412 demand of applications. For example, it
4413 appears that `objcopy' might not set the
4414 section of a symbol to be a section that is
4415 actually in the output file. */
4416 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4417 BFD_ASSERT (sec2
!= 0);
4418 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4419 BFD_ASSERT (shndx
!= -1);
4423 sym
.st_shndx
= shndx
;
4426 if ((flags
& BSF_FUNCTION
) != 0)
4428 else if ((flags
& BSF_OBJECT
) != 0)
4433 /* Processor-specific types */
4434 if (type_ptr
!= NULL
4435 && bed
->elf_backend_get_symbol_type
)
4436 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4438 if (flags
& BSF_SECTION_SYM
)
4440 if (flags
& BSF_GLOBAL
)
4441 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
4443 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4445 else if (bfd_is_com_section (syms
[idx
]->section
))
4446 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4447 else if (bfd_is_und_section (syms
[idx
]->section
))
4448 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4452 else if (flags
& BSF_FILE
)
4453 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4456 int bind
= STB_LOCAL
;
4458 if (flags
& BSF_LOCAL
)
4460 else if (flags
& BSF_WEAK
)
4462 else if (flags
& BSF_GLOBAL
)
4465 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4468 if (type_ptr
!= NULL
)
4469 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4473 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4474 outbound_syms
+= bed
->s
->sizeof_sym
;
4478 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4479 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4481 symstrtab_hdr
->sh_flags
= 0;
4482 symstrtab_hdr
->sh_addr
= 0;
4483 symstrtab_hdr
->sh_entsize
= 0;
4484 symstrtab_hdr
->sh_link
= 0;
4485 symstrtab_hdr
->sh_info
= 0;
4486 symstrtab_hdr
->sh_addralign
= 1;
4492 /* Return the number of bytes required to hold the symtab vector.
4494 Note that we base it on the count plus 1, since we will null terminate
4495 the vector allocated based on this size. However, the ELF symbol table
4496 always has a dummy entry as symbol #0, so it ends up even. */
4499 _bfd_elf_get_symtab_upper_bound (abfd
)
4504 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4506 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4507 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4513 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4518 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4520 if (elf_dynsymtab (abfd
) == 0)
4522 bfd_set_error (bfd_error_invalid_operation
);
4526 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4527 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4533 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4534 bfd
*abfd ATTRIBUTE_UNUSED
;
4537 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4540 /* Canonicalize the relocs. */
4543 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4552 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4558 tblptr
= section
->relocation
;
4559 for (i
= 0; i
< section
->reloc_count
; i
++)
4560 *relptr
++ = tblptr
++;
4564 return section
->reloc_count
;
4568 _bfd_elf_get_symtab (abfd
, alocation
)
4570 asymbol
**alocation
;
4572 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4573 (abfd
, alocation
, false);
4576 bfd_get_symcount (abfd
) = symcount
;
4581 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4583 asymbol
**alocation
;
4585 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4586 (abfd
, alocation
, true);
4589 /* Return the size required for the dynamic reloc entries. Any
4590 section that was actually installed in the BFD, and has type
4591 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4592 considered to be a dynamic reloc section. */
4595 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4601 if (elf_dynsymtab (abfd
) == 0)
4603 bfd_set_error (bfd_error_invalid_operation
);
4607 ret
= sizeof (arelent
*);
4608 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4609 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4610 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4611 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4612 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4613 * sizeof (arelent
*));
4618 /* Canonicalize the dynamic relocation entries. Note that we return
4619 the dynamic relocations as a single block, although they are
4620 actually associated with particular sections; the interface, which
4621 was designed for SunOS style shared libraries, expects that there
4622 is only one set of dynamic relocs. Any section that was actually
4623 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4624 the dynamic symbol table, is considered to be a dynamic reloc
4628 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4633 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4637 if (elf_dynsymtab (abfd
) == 0)
4639 bfd_set_error (bfd_error_invalid_operation
);
4643 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4645 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4647 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4648 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4649 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4654 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4656 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4658 for (i
= 0; i
< count
; i
++)
4669 /* Read in the version information. */
4672 _bfd_elf_slurp_version_tables (abfd
)
4675 bfd_byte
*contents
= NULL
;
4677 if (elf_dynverdef (abfd
) != 0)
4679 Elf_Internal_Shdr
*hdr
;
4680 Elf_External_Verdef
*everdef
;
4681 Elf_Internal_Verdef
*iverdef
;
4682 Elf_Internal_Verdef
*iverdefarr
;
4683 Elf_Internal_Verdef iverdefmem
;
4685 unsigned int maxidx
;
4687 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4689 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4690 if (contents
== NULL
)
4692 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4693 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4696 /* We know the number of entries in the section but not the maximum
4697 index. Therefore we have to run through all entries and find
4699 everdef
= (Elf_External_Verdef
*) contents
;
4701 for (i
= 0; i
< hdr
->sh_info
; ++i
)
4703 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4705 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
4706 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
4708 everdef
= ((Elf_External_Verdef
*)
4709 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
4712 elf_tdata (abfd
)->verdef
=
4713 ((Elf_Internal_Verdef
*)
4714 bfd_zalloc (abfd
, maxidx
* sizeof (Elf_Internal_Verdef
)));
4715 if (elf_tdata (abfd
)->verdef
== NULL
)
4718 elf_tdata (abfd
)->cverdefs
= maxidx
;
4720 everdef
= (Elf_External_Verdef
*) contents
;
4721 iverdefarr
= elf_tdata (abfd
)->verdef
;
4722 for (i
= 0; i
< hdr
->sh_info
; i
++)
4724 Elf_External_Verdaux
*everdaux
;
4725 Elf_Internal_Verdaux
*iverdaux
;
4728 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4730 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
4731 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
4733 iverdef
->vd_bfd
= abfd
;
4735 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4738 * sizeof (Elf_Internal_Verdaux
))));
4739 if (iverdef
->vd_auxptr
== NULL
)
4742 everdaux
= ((Elf_External_Verdaux
*)
4743 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4744 iverdaux
= iverdef
->vd_auxptr
;
4745 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4747 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4749 iverdaux
->vda_nodename
=
4750 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4751 iverdaux
->vda_name
);
4752 if (iverdaux
->vda_nodename
== NULL
)
4755 if (j
+ 1 < iverdef
->vd_cnt
)
4756 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4758 iverdaux
->vda_nextptr
= NULL
;
4760 everdaux
= ((Elf_External_Verdaux
*)
4761 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4764 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4766 if (i
+ 1 < hdr
->sh_info
)
4767 iverdef
->vd_nextdef
= iverdef
+ 1;
4769 iverdef
->vd_nextdef
= NULL
;
4771 everdef
= ((Elf_External_Verdef
*)
4772 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4779 if (elf_dynverref (abfd
) != 0)
4781 Elf_Internal_Shdr
*hdr
;
4782 Elf_External_Verneed
*everneed
;
4783 Elf_Internal_Verneed
*iverneed
;
4786 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4788 elf_tdata (abfd
)->verref
=
4789 ((Elf_Internal_Verneed
*)
4790 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4791 if (elf_tdata (abfd
)->verref
== NULL
)
4794 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4796 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4797 if (contents
== NULL
)
4799 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4800 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4803 everneed
= (Elf_External_Verneed
*) contents
;
4804 iverneed
= elf_tdata (abfd
)->verref
;
4805 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4807 Elf_External_Vernaux
*evernaux
;
4808 Elf_Internal_Vernaux
*ivernaux
;
4811 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4813 iverneed
->vn_bfd
= abfd
;
4815 iverneed
->vn_filename
=
4816 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4818 if (iverneed
->vn_filename
== NULL
)
4821 iverneed
->vn_auxptr
=
4822 ((Elf_Internal_Vernaux
*)
4824 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4826 evernaux
= ((Elf_External_Vernaux
*)
4827 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4828 ivernaux
= iverneed
->vn_auxptr
;
4829 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4831 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4833 ivernaux
->vna_nodename
=
4834 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4835 ivernaux
->vna_name
);
4836 if (ivernaux
->vna_nodename
== NULL
)
4839 if (j
+ 1 < iverneed
->vn_cnt
)
4840 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4842 ivernaux
->vna_nextptr
= NULL
;
4844 evernaux
= ((Elf_External_Vernaux
*)
4845 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4848 if (i
+ 1 < hdr
->sh_info
)
4849 iverneed
->vn_nextref
= iverneed
+ 1;
4851 iverneed
->vn_nextref
= NULL
;
4853 everneed
= ((Elf_External_Verneed
*)
4854 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4864 if (contents
== NULL
)
4870 _bfd_elf_make_empty_symbol (abfd
)
4873 elf_symbol_type
*newsym
;
4875 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4880 newsym
->symbol
.the_bfd
= abfd
;
4881 return &newsym
->symbol
;
4886 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4887 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4891 bfd_symbol_info (symbol
, ret
);
4894 /* Return whether a symbol name implies a local symbol. Most targets
4895 use this function for the is_local_label_name entry point, but some
4899 _bfd_elf_is_local_label_name (abfd
, name
)
4900 bfd
*abfd ATTRIBUTE_UNUSED
;
4903 /* Normal local symbols start with ``.L''. */
4904 if (name
[0] == '.' && name
[1] == 'L')
4907 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
4908 DWARF debugging symbols starting with ``..''. */
4909 if (name
[0] == '.' && name
[1] == '.')
4912 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
4913 emitting DWARF debugging output. I suspect this is actually a
4914 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
4915 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
4916 underscore to be emitted on some ELF targets). For ease of use,
4917 we treat such symbols as local. */
4918 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
4925 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
4926 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4927 asymbol
*symbol ATTRIBUTE_UNUSED
;
4934 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
4936 enum bfd_architecture arch
;
4937 unsigned long machine
;
4939 /* If this isn't the right architecture for this backend, and this
4940 isn't the generic backend, fail. */
4941 if (arch
!= get_elf_backend_data (abfd
)->arch
4942 && arch
!= bfd_arch_unknown
4943 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
4946 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
4949 /* Find the function to a particular section and offset,
4950 for error reporting. */
4953 elf_find_function (abfd
, section
, symbols
, offset
,
4954 filename_ptr
, functionname_ptr
)
4955 bfd
*abfd ATTRIBUTE_UNUSED
;
4959 const char **filename_ptr
;
4960 const char **functionname_ptr
;
4962 const char *filename
;
4971 for (p
= symbols
; *p
!= NULL
; p
++)
4975 q
= (elf_symbol_type
*) *p
;
4977 if (bfd_get_section (&q
->symbol
) != section
)
4980 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
4985 filename
= bfd_asymbol_name (&q
->symbol
);
4989 if (q
->symbol
.section
== section
4990 && q
->symbol
.value
>= low_func
4991 && q
->symbol
.value
<= offset
)
4993 func
= (asymbol
*) q
;
4994 low_func
= q
->symbol
.value
;
5004 *filename_ptr
= filename
;
5005 if (functionname_ptr
)
5006 *functionname_ptr
= bfd_asymbol_name (func
);
5011 /* Find the nearest line to a particular section and offset,
5012 for error reporting. */
5015 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5016 filename_ptr
, functionname_ptr
, line_ptr
)
5021 const char **filename_ptr
;
5022 const char **functionname_ptr
;
5023 unsigned int *line_ptr
;
5027 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5028 filename_ptr
, functionname_ptr
,
5031 if (!*functionname_ptr
)
5032 elf_find_function (abfd
, section
, symbols
, offset
,
5033 *filename_ptr
? NULL
: filename_ptr
,
5039 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5040 filename_ptr
, functionname_ptr
,
5042 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5044 if (!*functionname_ptr
)
5045 elf_find_function (abfd
, section
, symbols
, offset
,
5046 *filename_ptr
? NULL
: filename_ptr
,
5052 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5053 &found
, filename_ptr
,
5054 functionname_ptr
, line_ptr
,
5055 &elf_tdata (abfd
)->line_info
))
5060 if (symbols
== NULL
)
5063 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5064 filename_ptr
, functionname_ptr
))
5072 _bfd_elf_sizeof_headers (abfd
, reloc
)
5078 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5080 ret
+= get_program_header_size (abfd
);
5085 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5090 bfd_size_type count
;
5092 Elf_Internal_Shdr
*hdr
;
5094 if (! abfd
->output_has_begun
5095 && ! _bfd_elf_compute_section_file_positions
5096 (abfd
, (struct bfd_link_info
*) NULL
))
5099 hdr
= &elf_section_data (section
)->this_hdr
;
5101 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
5103 if (bfd_write (location
, 1, count
, abfd
) != count
)
5110 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5111 bfd
*abfd ATTRIBUTE_UNUSED
;
5112 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5113 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5120 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5123 Elf_Internal_Rel
*dst
;
5129 /* Try to convert a non-ELF reloc into an ELF one. */
5132 _bfd_elf_validate_reloc (abfd
, areloc
)
5136 /* Check whether we really have an ELF howto. */
5138 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5140 bfd_reloc_code_real_type code
;
5141 reloc_howto_type
*howto
;
5143 /* Alien reloc: Try to determine its type to replace it with an
5144 equivalent ELF reloc. */
5146 if (areloc
->howto
->pc_relative
)
5148 switch (areloc
->howto
->bitsize
)
5151 code
= BFD_RELOC_8_PCREL
;
5154 code
= BFD_RELOC_12_PCREL
;
5157 code
= BFD_RELOC_16_PCREL
;
5160 code
= BFD_RELOC_24_PCREL
;
5163 code
= BFD_RELOC_32_PCREL
;
5166 code
= BFD_RELOC_64_PCREL
;
5172 howto
= bfd_reloc_type_lookup (abfd
, code
);
5174 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5176 if (howto
->pcrel_offset
)
5177 areloc
->addend
+= areloc
->address
;
5179 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5184 switch (areloc
->howto
->bitsize
)
5190 code
= BFD_RELOC_14
;
5193 code
= BFD_RELOC_16
;
5196 code
= BFD_RELOC_26
;
5199 code
= BFD_RELOC_32
;
5202 code
= BFD_RELOC_64
;
5208 howto
= bfd_reloc_type_lookup (abfd
, code
);
5212 areloc
->howto
= howto
;
5220 (*_bfd_error_handler
)
5221 (_("%s: unsupported relocation type %s"),
5222 bfd_get_filename (abfd
), areloc
->howto
->name
);
5223 bfd_set_error (bfd_error_bad_value
);
5228 _bfd_elf_close_and_cleanup (abfd
)
5231 if (bfd_get_format (abfd
) == bfd_object
)
5233 if (elf_shstrtab (abfd
) != NULL
)
5234 _bfd_stringtab_free (elf_shstrtab (abfd
));
5237 return _bfd_generic_close_and_cleanup (abfd
);
5240 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5241 in the relocation's offset. Thus we cannot allow any sort of sanity
5242 range-checking to interfere. There is nothing else to do in processing
5245 bfd_reloc_status_type
5246 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5247 bfd
*abfd ATTRIBUTE_UNUSED
;
5248 arelent
*re ATTRIBUTE_UNUSED
;
5249 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5250 PTR data ATTRIBUTE_UNUSED
;
5251 asection
*is ATTRIBUTE_UNUSED
;
5252 bfd
*obfd ATTRIBUTE_UNUSED
;
5253 char **errmsg ATTRIBUTE_UNUSED
;
5255 return bfd_reloc_ok
;
5258 /* Elf core file support. Much of this only works on native
5259 toolchains, since we rely on knowing the
5260 machine-dependent procfs structure in order to pick
5261 out details about the corefile. */
5263 #ifdef HAVE_SYS_PROCFS_H
5264 # include <sys/procfs.h>
5267 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5270 elfcore_make_pid (abfd
)
5273 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5274 + (elf_tdata (abfd
)->core_pid
));
5277 /* If there isn't a section called NAME, make one, using
5278 data from SECT. Note, this function will generate a
5279 reference to NAME, so you shouldn't deallocate or
5283 elfcore_maybe_make_sect (abfd
, name
, sect
)
5290 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5293 sect2
= bfd_make_section (abfd
, name
);
5297 sect2
->_raw_size
= sect
->_raw_size
;
5298 sect2
->filepos
= sect
->filepos
;
5299 sect2
->flags
= sect
->flags
;
5300 sect2
->alignment_power
= sect
->alignment_power
;
5304 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
5305 actually creates up to two pseudosections:
5306 - For the single-threaded case, a section named NAME, unless
5307 such a section already exists.
5308 - For the multi-threaded case, a section named "NAME/PID", where
5309 PID is elfcore_make_pid (abfd).
5310 Both pseudosections have identical contents. */
5312 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
5319 char *threaded_name
;
5322 /* Build the section name. */
5324 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5325 threaded_name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5326 if (threaded_name
== NULL
)
5328 strcpy (threaded_name
, buf
);
5330 sect
= bfd_make_section (abfd
, threaded_name
);
5333 sect
->_raw_size
= size
;
5334 sect
->filepos
= filepos
;
5335 sect
->flags
= SEC_HAS_CONTENTS
;
5336 sect
->alignment_power
= 2;
5338 return elfcore_maybe_make_sect (abfd
, name
, sect
);
5341 /* prstatus_t exists on:
5343 linux 2.[01] + glibc
5347 #if defined (HAVE_PRSTATUS_T)
5348 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
5351 elfcore_grok_prstatus (abfd
, note
)
5353 Elf_Internal_Note
*note
;
5358 if (note
->descsz
== sizeof (prstatus_t
))
5362 raw_size
= sizeof (prstat
.pr_reg
);
5363 offset
= offsetof (prstatus_t
, pr_reg
);
5364 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5366 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5367 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5369 /* pr_who exists on:
5372 pr_who doesn't exist on:
5375 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5376 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5379 #if defined (HAVE_PRSTATUS32_T)
5380 else if (note
->descsz
== sizeof (prstatus32_t
))
5382 /* 64-bit host, 32-bit corefile */
5383 prstatus32_t prstat
;
5385 raw_size
= sizeof (prstat
.pr_reg
);
5386 offset
= offsetof (prstatus32_t
, pr_reg
);
5387 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5389 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5390 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5392 /* pr_who exists on:
5395 pr_who doesn't exist on:
5398 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5399 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5402 #endif /* HAVE_PRSTATUS32_T */
5405 /* Fail - we don't know how to handle any other
5406 note size (ie. data object type). */
5410 /* Make a ".reg/999" section and a ".reg" section. */
5411 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
5412 raw_size
, note
->descpos
+ offset
);
5414 #endif /* defined (HAVE_PRSTATUS_T) */
5416 /* Create a pseudosection containing the exact contents of NOTE. */
5418 elfcore_make_note_pseudosection (abfd
, name
, note
)
5421 Elf_Internal_Note
*note
;
5423 return _bfd_elfcore_make_pseudosection (abfd
, name
,
5424 note
->descsz
, note
->descpos
);
5427 /* There isn't a consistent prfpregset_t across platforms,
5428 but it doesn't matter, because we don't have to pick this
5429 data structure apart. */
5432 elfcore_grok_prfpreg (abfd
, note
)
5434 Elf_Internal_Note
*note
;
5436 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
5439 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5440 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5444 elfcore_grok_prxfpreg (abfd
, note
)
5446 Elf_Internal_Note
*note
;
5448 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
5451 #if defined (HAVE_PRPSINFO_T)
5452 typedef prpsinfo_t elfcore_psinfo_t
;
5453 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5454 typedef prpsinfo32_t elfcore_psinfo32_t
;
5458 #if defined (HAVE_PSINFO_T)
5459 typedef psinfo_t elfcore_psinfo_t
;
5460 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5461 typedef psinfo32_t elfcore_psinfo32_t
;
5465 /* return a malloc'ed copy of a string at START which is at
5466 most MAX bytes long, possibly without a terminating '\0'.
5467 the copy will always have a terminating '\0'. */
5470 _bfd_elfcore_strndup (abfd
, start
, max
)
5476 char *end
= memchr (start
, '\0', max
);
5484 dup
= bfd_alloc (abfd
, len
+ 1);
5488 memcpy (dup
, start
, len
);
5494 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5495 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
5498 elfcore_grok_psinfo (abfd
, note
)
5500 Elf_Internal_Note
*note
;
5502 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
5504 elfcore_psinfo_t psinfo
;
5506 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5508 elf_tdata (abfd
)->core_program
5509 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5510 sizeof (psinfo
.pr_fname
));
5512 elf_tdata (abfd
)->core_command
5513 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5514 sizeof (psinfo
.pr_psargs
));
5516 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5517 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
5519 /* 64-bit host, 32-bit corefile */
5520 elfcore_psinfo32_t psinfo
;
5522 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5524 elf_tdata (abfd
)->core_program
5525 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5526 sizeof (psinfo
.pr_fname
));
5528 elf_tdata (abfd
)->core_command
5529 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5530 sizeof (psinfo
.pr_psargs
));
5536 /* Fail - we don't know how to handle any other
5537 note size (ie. data object type). */
5541 /* Note that for some reason, a spurious space is tacked
5542 onto the end of the args in some (at least one anyway)
5543 implementations, so strip it off if it exists. */
5546 char *command
= elf_tdata (abfd
)->core_command
;
5547 int n
= strlen (command
);
5549 if (0 < n
&& command
[n
- 1] == ' ')
5550 command
[n
- 1] = '\0';
5555 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5557 #if defined (HAVE_PSTATUS_T)
5559 elfcore_grok_pstatus (abfd
, note
)
5561 Elf_Internal_Note
*note
;
5563 if (note
->descsz
== sizeof (pstatus_t
)
5564 #if defined (HAVE_PXSTATUS_T)
5565 || note
->descsz
== sizeof (pxstatus_t
)
5571 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5573 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5575 #if defined (HAVE_PSTATUS32_T)
5576 else if (note
->descsz
== sizeof (pstatus32_t
))
5578 /* 64-bit host, 32-bit corefile */
5581 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5583 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5586 /* Could grab some more details from the "representative"
5587 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5588 NT_LWPSTATUS note, presumably. */
5592 #endif /* defined (HAVE_PSTATUS_T) */
5594 #if defined (HAVE_LWPSTATUS_T)
5596 elfcore_grok_lwpstatus (abfd
, note
)
5598 Elf_Internal_Note
*note
;
5600 lwpstatus_t lwpstat
;
5605 if (note
->descsz
!= sizeof (lwpstat
)
5606 #if defined (HAVE_LWPXSTATUS_T)
5607 && note
->descsz
!= sizeof (lwpxstatus_t
)
5612 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5614 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5615 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5617 /* Make a ".reg/999" section. */
5619 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5620 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5625 sect
= bfd_make_section (abfd
, name
);
5629 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5630 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5631 sect
->filepos
= note
->descpos
5632 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5635 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5636 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5637 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5640 sect
->flags
= SEC_HAS_CONTENTS
;
5641 sect
->alignment_power
= 2;
5643 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5646 /* Make a ".reg2/999" section */
5648 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5649 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5654 sect
= bfd_make_section (abfd
, name
);
5658 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5659 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5660 sect
->filepos
= note
->descpos
5661 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5664 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5665 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5666 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5669 sect
->flags
= SEC_HAS_CONTENTS
;
5670 sect
->alignment_power
= 2;
5672 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
5674 #endif /* defined (HAVE_LWPSTATUS_T) */
5676 #if defined (HAVE_WIN32_PSTATUS_T)
5678 elfcore_grok_win32pstatus (abfd
, note
)
5680 Elf_Internal_Note
*note
;
5685 win32_pstatus_t pstatus
;
5687 if (note
->descsz
< sizeof (pstatus
))
5690 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
5692 switch (pstatus
.data_type
)
5694 case NOTE_INFO_PROCESS
:
5695 /* FIXME: need to add ->core_command. */
5696 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
5697 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
5700 case NOTE_INFO_THREAD
:
5701 /* Make a ".reg/999" section. */
5702 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
5704 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5710 sect
= bfd_make_section (abfd
, name
);
5714 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
5715 sect
->filepos
= note
->descpos
+ offsetof (struct win32_pstatus
,
5716 data
.thread_info
.thread_context
);
5717 sect
->flags
= SEC_HAS_CONTENTS
;
5718 sect
->alignment_power
= 2;
5720 if (pstatus
.data
.thread_info
.is_active_thread
)
5721 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5725 case NOTE_INFO_MODULE
:
5726 /* Make a ".module/xxxxxxxx" section. */
5727 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
5729 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5735 sect
= bfd_make_section (abfd
, name
);
5740 sect
->_raw_size
= note
->descsz
;
5741 sect
->filepos
= note
->descpos
;
5742 sect
->flags
= SEC_HAS_CONTENTS
;
5743 sect
->alignment_power
= 2;
5752 #endif /* HAVE_WIN32_PSTATUS_T */
5755 elfcore_grok_note (abfd
, note
)
5757 Elf_Internal_Note
*note
;
5759 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5767 if (bed
->elf_backend_grok_prstatus
)
5768 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
5770 #if defined (HAVE_PRSTATUS_T)
5771 return elfcore_grok_prstatus (abfd
, note
);
5776 #if defined (HAVE_PSTATUS_T)
5778 return elfcore_grok_pstatus (abfd
, note
);
5781 #if defined (HAVE_LWPSTATUS_T)
5783 return elfcore_grok_lwpstatus (abfd
, note
);
5786 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5787 return elfcore_grok_prfpreg (abfd
, note
);
5789 #if defined (HAVE_WIN32_PSTATUS_T)
5790 case NT_WIN32PSTATUS
:
5791 return elfcore_grok_win32pstatus (abfd
, note
);
5794 case NT_PRXFPREG
: /* Linux SSE extension */
5795 if (note
->namesz
== 5
5796 && ! strcmp (note
->namedata
, "LINUX"))
5797 return elfcore_grok_prxfpreg (abfd
, note
);
5803 if (bed
->elf_backend_grok_psinfo
)
5804 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
5806 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5807 return elfcore_grok_psinfo (abfd
, note
);
5815 elfcore_read_notes (abfd
, offset
, size
)
5826 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5829 buf
= bfd_malloc ((size_t) size
);
5833 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5841 while (p
< buf
+ size
)
5843 /* FIXME: bad alignment assumption. */
5844 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
5845 Elf_Internal_Note in
;
5847 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5849 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5850 in
.namedata
= xnp
->name
;
5852 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5853 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5854 in
.descpos
= offset
+ (in
.descdata
- buf
);
5856 if (! elfcore_grok_note (abfd
, &in
))
5859 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5866 /* Providing external access to the ELF program header table. */
5868 /* Return an upper bound on the number of bytes required to store a
5869 copy of ABFD's program header table entries. Return -1 if an error
5870 occurs; bfd_get_error will return an appropriate code. */
5873 bfd_get_elf_phdr_upper_bound (abfd
)
5876 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5878 bfd_set_error (bfd_error_wrong_format
);
5882 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
5885 /* Copy ABFD's program header table entries to *PHDRS. The entries
5886 will be stored as an array of Elf_Internal_Phdr structures, as
5887 defined in include/elf/internal.h. To find out how large the
5888 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5890 Return the number of program header table entries read, or -1 if an
5891 error occurs; bfd_get_error will return an appropriate code. */
5894 bfd_get_elf_phdrs (abfd
, phdrs
)
5900 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5902 bfd_set_error (bfd_error_wrong_format
);
5906 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
5907 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
5908 num_phdrs
* sizeof (Elf_Internal_Phdr
));
5914 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
5915 bfd
*abfd ATTRIBUTE_UNUSED
;
5920 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
5922 i_ehdrp
= elf_elfheader (abfd
);
5923 if (i_ehdrp
== NULL
)
5924 sprintf_vma (buf
, value
);
5927 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
5929 #if BFD_HOST_64BIT_LONG
5930 sprintf (buf
, "%016lx", value
);
5932 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
5933 _bfd_int64_low (value
));
5937 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
5940 sprintf_vma (buf
, value
);
5945 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
5946 bfd
*abfd ATTRIBUTE_UNUSED
;
5951 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
5953 i_ehdrp
= elf_elfheader (abfd
);
5954 if (i_ehdrp
== NULL
)
5955 fprintf_vma ((FILE *) stream
, value
);
5958 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
5960 #if BFD_HOST_64BIT_LONG
5961 fprintf ((FILE *) stream
, "%016lx", value
);
5963 fprintf ((FILE *) stream
, "%08lx%08lx",
5964 _bfd_int64_high (value
), _bfd_int64_low (value
));
5968 fprintf ((FILE *) stream
, "%08lx",
5969 (unsigned long) (value
& 0xffffffff));
5972 fprintf_vma ((FILE *) stream
, value
);
5976 enum elf_reloc_type_class
5977 _bfd_elf_reloc_type_class (type
)
5978 int type ATTRIBUTE_UNUSED
;
5980 return reloc_class_normal
;