1 /* ELF executable support for BFD.
2 Copyright 1993, 94, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
34 /* For sparc64-cross-sparc32. */
43 static INLINE
struct elf_segment_map
*make_mapping
44 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
45 static boolean map_sections_to_segments
PARAMS ((bfd
*));
46 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
47 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
48 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
49 static boolean prep_headers
PARAMS ((bfd
*));
50 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
51 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
52 static char *elf_read
PARAMS ((bfd
*, long, unsigned int));
53 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
54 static boolean assign_section_numbers
PARAMS ((bfd
*));
55 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
56 static boolean elf_map_symbols
PARAMS ((bfd
*));
57 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
58 static boolean elfcore_read_notes
PARAMS ((bfd
*, bfd_vma
, bfd_vma
));
60 /* Swap version information in and out. The version information is
61 currently size independent. If that ever changes, this code will
62 need to move into elfcode.h. */
64 /* Swap in a Verdef structure. */
67 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
69 const Elf_External_Verdef
*src
;
70 Elf_Internal_Verdef
*dst
;
72 dst
->vd_version
= bfd_h_get_16 (abfd
, src
->vd_version
);
73 dst
->vd_flags
= bfd_h_get_16 (abfd
, src
->vd_flags
);
74 dst
->vd_ndx
= bfd_h_get_16 (abfd
, src
->vd_ndx
);
75 dst
->vd_cnt
= bfd_h_get_16 (abfd
, src
->vd_cnt
);
76 dst
->vd_hash
= bfd_h_get_32 (abfd
, src
->vd_hash
);
77 dst
->vd_aux
= bfd_h_get_32 (abfd
, src
->vd_aux
);
78 dst
->vd_next
= bfd_h_get_32 (abfd
, src
->vd_next
);
81 /* Swap out a Verdef structure. */
84 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
86 const Elf_Internal_Verdef
*src
;
87 Elf_External_Verdef
*dst
;
89 bfd_h_put_16 (abfd
, src
->vd_version
, dst
->vd_version
);
90 bfd_h_put_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
91 bfd_h_put_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
92 bfd_h_put_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
93 bfd_h_put_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
94 bfd_h_put_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
95 bfd_h_put_32 (abfd
, src
->vd_next
, dst
->vd_next
);
98 /* Swap in a Verdaux structure. */
101 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
103 const Elf_External_Verdaux
*src
;
104 Elf_Internal_Verdaux
*dst
;
106 dst
->vda_name
= bfd_h_get_32 (abfd
, src
->vda_name
);
107 dst
->vda_next
= bfd_h_get_32 (abfd
, src
->vda_next
);
110 /* Swap out a Verdaux structure. */
113 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
115 const Elf_Internal_Verdaux
*src
;
116 Elf_External_Verdaux
*dst
;
118 bfd_h_put_32 (abfd
, src
->vda_name
, dst
->vda_name
);
119 bfd_h_put_32 (abfd
, src
->vda_next
, dst
->vda_next
);
122 /* Swap in a Verneed structure. */
125 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
127 const Elf_External_Verneed
*src
;
128 Elf_Internal_Verneed
*dst
;
130 dst
->vn_version
= bfd_h_get_16 (abfd
, src
->vn_version
);
131 dst
->vn_cnt
= bfd_h_get_16 (abfd
, src
->vn_cnt
);
132 dst
->vn_file
= bfd_h_get_32 (abfd
, src
->vn_file
);
133 dst
->vn_aux
= bfd_h_get_32 (abfd
, src
->vn_aux
);
134 dst
->vn_next
= bfd_h_get_32 (abfd
, src
->vn_next
);
137 /* Swap out a Verneed structure. */
140 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
142 const Elf_Internal_Verneed
*src
;
143 Elf_External_Verneed
*dst
;
145 bfd_h_put_16 (abfd
, src
->vn_version
, dst
->vn_version
);
146 bfd_h_put_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
147 bfd_h_put_32 (abfd
, src
->vn_file
, dst
->vn_file
);
148 bfd_h_put_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
149 bfd_h_put_32 (abfd
, src
->vn_next
, dst
->vn_next
);
152 /* Swap in a Vernaux structure. */
155 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
157 const Elf_External_Vernaux
*src
;
158 Elf_Internal_Vernaux
*dst
;
160 dst
->vna_hash
= bfd_h_get_32 (abfd
, src
->vna_hash
);
161 dst
->vna_flags
= bfd_h_get_16 (abfd
, src
->vna_flags
);
162 dst
->vna_other
= bfd_h_get_16 (abfd
, src
->vna_other
);
163 dst
->vna_name
= bfd_h_get_32 (abfd
, src
->vna_name
);
164 dst
->vna_next
= bfd_h_get_32 (abfd
, src
->vna_next
);
167 /* Swap out a Vernaux structure. */
170 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
172 const Elf_Internal_Vernaux
*src
;
173 Elf_External_Vernaux
*dst
;
175 bfd_h_put_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
176 bfd_h_put_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
177 bfd_h_put_16 (abfd
, src
->vna_other
, dst
->vna_other
);
178 bfd_h_put_32 (abfd
, src
->vna_name
, dst
->vna_name
);
179 bfd_h_put_32 (abfd
, src
->vna_next
, dst
->vna_next
);
182 /* Swap in a Versym structure. */
185 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
187 const Elf_External_Versym
*src
;
188 Elf_Internal_Versym
*dst
;
190 dst
->vs_vers
= bfd_h_get_16 (abfd
, src
->vs_vers
);
193 /* Swap out a Versym structure. */
196 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
198 const Elf_Internal_Versym
*src
;
199 Elf_External_Versym
*dst
;
201 bfd_h_put_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
204 /* Standard ELF hash function. Do not change this function; you will
205 cause invalid hash tables to be generated. */
208 bfd_elf_hash (namearg
)
211 const unsigned char *name
= (const unsigned char *) namearg
;
216 while ((ch
= *name
++) != '\0')
219 if ((g
= (h
& 0xf0000000)) != 0)
222 /* The ELF ABI says `h &= ~g', but this is equivalent in
223 this case and on some machines one insn instead of two. */
230 /* Read a specified number of bytes at a specified offset in an ELF
231 file, into a newly allocated buffer, and return a pointer to the
235 elf_read (abfd
, offset
, size
)
242 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
244 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
246 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
248 if (bfd_get_error () != bfd_error_system_call
)
249 bfd_set_error (bfd_error_file_truncated
);
256 bfd_elf_mkobject (abfd
)
259 /* This just does initialization. */
260 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
261 elf_tdata (abfd
) = (struct elf_obj_tdata
*)
262 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
263 if (elf_tdata (abfd
) == 0)
265 /* Since everything is done at close time, do we need any
272 bfd_elf_mkcorefile (abfd
)
275 /* I think this can be done just like an object file. */
276 return bfd_elf_mkobject (abfd
);
280 bfd_elf_get_str_section (abfd
, shindex
)
282 unsigned int shindex
;
284 Elf_Internal_Shdr
**i_shdrp
;
285 char *shstrtab
= NULL
;
287 unsigned int shstrtabsize
;
289 i_shdrp
= elf_elfsections (abfd
);
290 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
293 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
294 if (shstrtab
== NULL
)
296 /* No cached one, attempt to read, and cache what we read. */
297 offset
= i_shdrp
[shindex
]->sh_offset
;
298 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
299 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
300 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
306 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
308 unsigned int shindex
;
309 unsigned int strindex
;
311 Elf_Internal_Shdr
*hdr
;
316 hdr
= elf_elfsections (abfd
)[shindex
];
318 if (hdr
->contents
== NULL
319 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
322 if (strindex
>= hdr
->sh_size
)
324 (*_bfd_error_handler
)
325 (_("%s: invalid string offset %u >= %lu for section `%s'"),
326 bfd_get_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
327 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
328 && strindex
== hdr
->sh_name
)
330 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
334 return ((char *) hdr
->contents
) + strindex
;
337 /* Make a BFD section from an ELF section. We store a pointer to the
338 BFD section in the bfd_section field of the header. */
341 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
343 Elf_Internal_Shdr
*hdr
;
349 if (hdr
->bfd_section
!= NULL
)
351 BFD_ASSERT (strcmp (name
,
352 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
356 newsect
= bfd_make_section_anyway (abfd
, name
);
360 newsect
->filepos
= hdr
->sh_offset
;
362 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
363 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
364 || ! bfd_set_section_alignment (abfd
, newsect
,
365 bfd_log2 (hdr
->sh_addralign
)))
368 flags
= SEC_NO_FLAGS
;
369 if (hdr
->sh_type
!= SHT_NOBITS
)
370 flags
|= SEC_HAS_CONTENTS
;
371 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
374 if (hdr
->sh_type
!= SHT_NOBITS
)
377 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
378 flags
|= SEC_READONLY
;
379 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
381 else if ((flags
& SEC_LOAD
) != 0)
384 /* The debugging sections appear to be recognized only by name, not
387 static const char *debug_sec_names
[] =
396 for (i
= sizeof (debug_sec_names
) / sizeof (debug_sec_names
[0]); i
--;)
397 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
401 flags
|= SEC_DEBUGGING
;
404 /* As a GNU extension, if the name begins with .gnu.linkonce, we
405 only link a single copy of the section. This is used to support
406 g++. g++ will emit each template expansion in its own section.
407 The symbols will be defined as weak, so that multiple definitions
408 are permitted. The GNU linker extension is to actually discard
409 all but one of the sections. */
410 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
411 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
413 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
416 if ((flags
& SEC_ALLOC
) != 0)
418 Elf_Internal_Phdr
*phdr
;
421 /* Look through the phdrs to see if we need to adjust the lma.
422 If all the p_paddr fields are zero, we ignore them, since
423 some ELF linkers produce such output. */
424 phdr
= elf_tdata (abfd
)->phdr
;
425 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
427 if (phdr
->p_paddr
!= 0)
430 if (i
< elf_elfheader (abfd
)->e_phnum
)
432 phdr
= elf_tdata (abfd
)->phdr
;
433 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
435 if (phdr
->p_type
== PT_LOAD
436 && phdr
->p_vaddr
!= phdr
->p_paddr
437 && phdr
->p_vaddr
<= hdr
->sh_addr
438 && (phdr
->p_vaddr
+ phdr
->p_memsz
439 >= hdr
->sh_addr
+ hdr
->sh_size
)
440 && ((flags
& SEC_LOAD
) == 0
441 || (phdr
->p_offset
<= (bfd_vma
) hdr
->sh_offset
442 && (phdr
->p_offset
+ phdr
->p_filesz
443 >= hdr
->sh_offset
+ hdr
->sh_size
))))
445 newsect
->lma
+= phdr
->p_paddr
- phdr
->p_vaddr
;
452 hdr
->bfd_section
= newsect
;
453 elf_section_data (newsect
)->this_hdr
= *hdr
;
463 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
466 Helper functions for GDB to locate the string tables.
467 Since BFD hides string tables from callers, GDB needs to use an
468 internal hook to find them. Sun's .stabstr, in particular,
469 isn't even pointed to by the .stab section, so ordinary
470 mechanisms wouldn't work to find it, even if we had some.
473 struct elf_internal_shdr
*
474 bfd_elf_find_section (abfd
, name
)
478 Elf_Internal_Shdr
**i_shdrp
;
483 i_shdrp
= elf_elfsections (abfd
);
486 shstrtab
= bfd_elf_get_str_section
487 (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
488 if (shstrtab
!= NULL
)
490 max
= elf_elfheader (abfd
)->e_shnum
;
491 for (i
= 1; i
< max
; i
++)
492 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
499 const char *const bfd_elf_section_type_names
[] = {
500 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
501 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
502 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
505 /* ELF relocs are against symbols. If we are producing relocateable
506 output, and the reloc is against an external symbol, and nothing
507 has given us any additional addend, the resulting reloc will also
508 be against the same symbol. In such a case, we don't want to
509 change anything about the way the reloc is handled, since it will
510 all be done at final link time. Rather than put special case code
511 into bfd_perform_relocation, all the reloc types use this howto
512 function. It just short circuits the reloc if producing
513 relocateable output against an external symbol. */
515 bfd_reloc_status_type
516 bfd_elf_generic_reloc (abfd
,
523 bfd
*abfd ATTRIBUTE_UNUSED
;
524 arelent
*reloc_entry
;
526 PTR data ATTRIBUTE_UNUSED
;
527 asection
*input_section
;
529 char **error_message ATTRIBUTE_UNUSED
;
531 if (output_bfd
!= (bfd
*) NULL
532 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
533 && (! reloc_entry
->howto
->partial_inplace
534 || reloc_entry
->addend
== 0))
536 reloc_entry
->address
+= input_section
->output_offset
;
540 return bfd_reloc_continue
;
543 /* Print out the program headers. */
546 _bfd_elf_print_private_bfd_data (abfd
, farg
)
550 FILE *f
= (FILE *) farg
;
551 Elf_Internal_Phdr
*p
;
553 bfd_byte
*dynbuf
= NULL
;
555 p
= elf_tdata (abfd
)->phdr
;
560 fprintf (f
, _("\nProgram Header:\n"));
561 c
= elf_elfheader (abfd
)->e_phnum
;
562 for (i
= 0; i
< c
; i
++, p
++)
569 case PT_NULL
: s
= "NULL"; break;
570 case PT_LOAD
: s
= "LOAD"; break;
571 case PT_DYNAMIC
: s
= "DYNAMIC"; break;
572 case PT_INTERP
: s
= "INTERP"; break;
573 case PT_NOTE
: s
= "NOTE"; break;
574 case PT_SHLIB
: s
= "SHLIB"; break;
575 case PT_PHDR
: s
= "PHDR"; break;
576 default: sprintf (buf
, "0x%lx", p
->p_type
); s
= buf
; break;
578 fprintf (f
, "%8s off 0x", s
);
579 fprintf_vma (f
, p
->p_offset
);
580 fprintf (f
, " vaddr 0x");
581 fprintf_vma (f
, p
->p_vaddr
);
582 fprintf (f
, " paddr 0x");
583 fprintf_vma (f
, p
->p_paddr
);
584 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
585 fprintf (f
, " filesz 0x");
586 fprintf_vma (f
, p
->p_filesz
);
587 fprintf (f
, " memsz 0x");
588 fprintf_vma (f
, p
->p_memsz
);
589 fprintf (f
, " flags %c%c%c",
590 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
591 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
592 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
593 if ((p
->p_flags
&~ (PF_R
| PF_W
| PF_X
)) != 0)
594 fprintf (f
, " %lx", p
->p_flags
&~ (PF_R
| PF_W
| PF_X
));
599 s
= bfd_get_section_by_name (abfd
, ".dynamic");
604 bfd_byte
*extdyn
, *extdynend
;
606 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
608 fprintf (f
, _("\nDynamic Section:\n"));
610 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
613 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
617 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
620 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
622 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
623 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
626 extdynend
= extdyn
+ s
->_raw_size
;
627 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
629 Elf_Internal_Dyn dyn
;
634 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
636 if (dyn
.d_tag
== DT_NULL
)
643 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
647 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
648 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
649 case DT_PLTGOT
: name
= "PLTGOT"; break;
650 case DT_HASH
: name
= "HASH"; break;
651 case DT_STRTAB
: name
= "STRTAB"; break;
652 case DT_SYMTAB
: name
= "SYMTAB"; break;
653 case DT_RELA
: name
= "RELA"; break;
654 case DT_RELASZ
: name
= "RELASZ"; break;
655 case DT_RELAENT
: name
= "RELAENT"; break;
656 case DT_STRSZ
: name
= "STRSZ"; break;
657 case DT_SYMENT
: name
= "SYMENT"; break;
658 case DT_INIT
: name
= "INIT"; break;
659 case DT_FINI
: name
= "FINI"; break;
660 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
661 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
662 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
663 case DT_REL
: name
= "REL"; break;
664 case DT_RELSZ
: name
= "RELSZ"; break;
665 case DT_RELENT
: name
= "RELENT"; break;
666 case DT_PLTREL
: name
= "PLTREL"; break;
667 case DT_DEBUG
: name
= "DEBUG"; break;
668 case DT_TEXTREL
: name
= "TEXTREL"; break;
669 case DT_JMPREL
: name
= "JMPREL"; break;
670 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
671 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
672 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
673 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
674 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
675 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
676 case DT_FLAGS
: name
= "FLAGS"; break;
677 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
678 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
679 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
680 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
681 case DT_MOVEENT
: name
= "MOVEENT"; break;
682 case DT_MOVESZ
: name
= "MOVESZ"; break;
683 case DT_FEATURE
: name
= "FEATURE"; break;
684 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
685 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
686 case DT_SYMINENT
: name
= "SYMINENT"; break;
687 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
688 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
689 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
690 case DT_PLTPAD
: name
= "PLTPAD"; break;
691 case DT_MOVETAB
: name
= "MOVETAB"; break;
692 case DT_SYMINFO
: name
= "SYMINFO"; break;
693 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
694 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
695 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
696 case DT_VERSYM
: name
= "VERSYM"; break;
697 case DT_VERDEF
: name
= "VERDEF"; break;
698 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
699 case DT_VERNEED
: name
= "VERNEED"; break;
700 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
701 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
702 case DT_USED
: name
= "USED"; break;
703 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
706 fprintf (f
, " %-11s ", name
);
708 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
713 string
= bfd_elf_string_from_elf_section (abfd
, link
,
717 fprintf (f
, "%s", string
);
726 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
727 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
729 if (! _bfd_elf_slurp_version_tables (abfd
))
733 if (elf_dynverdef (abfd
) != 0)
735 Elf_Internal_Verdef
*t
;
737 fprintf (f
, _("\nVersion definitions:\n"));
738 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
740 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
741 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
742 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
744 Elf_Internal_Verdaux
*a
;
747 for (a
= t
->vd_auxptr
->vda_nextptr
;
750 fprintf (f
, "%s ", a
->vda_nodename
);
756 if (elf_dynverref (abfd
) != 0)
758 Elf_Internal_Verneed
*t
;
760 fprintf (f
, _("\nVersion References:\n"));
761 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
763 Elf_Internal_Vernaux
*a
;
765 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
766 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
767 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
768 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
780 /* Display ELF-specific fields of a symbol. */
783 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
787 bfd_print_symbol_type how
;
789 FILE *file
= (FILE *) filep
;
792 case bfd_print_symbol_name
:
793 fprintf (file
, "%s", symbol
->name
);
795 case bfd_print_symbol_more
:
796 fprintf (file
, "elf ");
797 fprintf_vma (file
, symbol
->value
);
798 fprintf (file
, " %lx", (long) symbol
->flags
);
800 case bfd_print_symbol_all
:
802 CONST
char *section_name
;
803 CONST
char *name
= NULL
;
804 struct elf_backend_data
*bed
;
805 unsigned char st_other
;
807 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
809 bed
= get_elf_backend_data (abfd
);
810 if (bed
->elf_backend_print_symbol_all
)
811 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
816 bfd_print_symbol_vandf ((PTR
) file
, symbol
);
819 fprintf (file
, " %s\t", section_name
);
820 /* Print the "other" value for a symbol. For common symbols,
821 we've already printed the size; now print the alignment.
822 For other symbols, we have no specified alignment, and
823 we've printed the address; now print the size. */
825 (bfd_is_com_section (symbol
->section
)
826 ? ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
827 : ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
));
829 /* If we have version information, print it. */
830 if (elf_tdata (abfd
)->dynversym_section
!= 0
831 && (elf_tdata (abfd
)->dynverdef_section
!= 0
832 || elf_tdata (abfd
)->dynverref_section
!= 0))
835 const char *version_string
;
837 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
841 else if (vernum
== 1)
842 version_string
= "Base";
843 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
845 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
848 Elf_Internal_Verneed
*t
;
851 for (t
= elf_tdata (abfd
)->verref
;
855 Elf_Internal_Vernaux
*a
;
857 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
859 if (a
->vna_other
== vernum
)
861 version_string
= a
->vna_nodename
;
868 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
869 fprintf (file
, " %-11s", version_string
);
874 fprintf (file
, " (%s)", version_string
);
875 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
880 /* If the st_other field is not zero, print it. */
881 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
886 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
887 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
888 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
890 /* Some other non-defined flags are also present, so print
892 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
895 fprintf (file
, " %s", name
);
901 /* Create an entry in an ELF linker hash table. */
903 struct bfd_hash_entry
*
904 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
905 struct bfd_hash_entry
*entry
;
906 struct bfd_hash_table
*table
;
909 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
911 /* Allocate the structure if it has not already been allocated by a
913 if (ret
== (struct elf_link_hash_entry
*) NULL
)
914 ret
= ((struct elf_link_hash_entry
*)
915 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
)));
916 if (ret
== (struct elf_link_hash_entry
*) NULL
)
917 return (struct bfd_hash_entry
*) ret
;
919 /* Call the allocation method of the superclass. */
920 ret
= ((struct elf_link_hash_entry
*)
921 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
923 if (ret
!= (struct elf_link_hash_entry
*) NULL
)
925 /* Set local fields. */
929 ret
->dynstr_index
= 0;
931 ret
->got
.offset
= (bfd_vma
) -1;
932 ret
->plt
.offset
= (bfd_vma
) -1;
933 ret
->linker_section_pointer
= (elf_linker_section_pointers_t
*)0;
934 ret
->verinfo
.verdef
= NULL
;
935 ret
->vtable_entries_used
= NULL
;
936 ret
->vtable_entries_size
= 0;
937 ret
->vtable_parent
= NULL
;
938 ret
->type
= STT_NOTYPE
;
940 /* Assume that we have been called by a non-ELF symbol reader.
941 This flag is then reset by the code which reads an ELF input
942 file. This ensures that a symbol created by a non-ELF symbol
943 reader will have the flag set correctly. */
944 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
947 return (struct bfd_hash_entry
*) ret
;
950 /* Copy data from an indirect symbol to its direct symbol, hiding the
951 old indirect symbol. */
954 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
955 struct elf_link_hash_entry
*dir
, *ind
;
957 /* Copy down any references that we may have already seen to the
958 symbol which just became indirect. */
960 dir
->elf_link_hash_flags
|=
961 (ind
->elf_link_hash_flags
962 & (ELF_LINK_HASH_REF_DYNAMIC
963 | ELF_LINK_HASH_REF_REGULAR
964 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
965 | ELF_LINK_NON_GOT_REF
));
967 /* Copy over the global and procedure linkage table offset entries.
968 These may have been already set up by a check_relocs routine. */
969 if (dir
->got
.offset
== (bfd_vma
) -1)
971 dir
->got
.offset
= ind
->got
.offset
;
972 ind
->got
.offset
= (bfd_vma
) -1;
974 BFD_ASSERT (ind
->got
.offset
== (bfd_vma
) -1);
976 if (dir
->plt
.offset
== (bfd_vma
) -1)
978 dir
->plt
.offset
= ind
->plt
.offset
;
979 ind
->plt
.offset
= (bfd_vma
) -1;
981 BFD_ASSERT (ind
->plt
.offset
== (bfd_vma
) -1);
983 if (dir
->dynindx
== -1)
985 dir
->dynindx
= ind
->dynindx
;
986 dir
->dynstr_index
= ind
->dynstr_index
;
988 ind
->dynstr_index
= 0;
990 BFD_ASSERT (ind
->dynindx
== -1);
994 _bfd_elf_link_hash_hide_symbol (info
, h
)
995 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
996 struct elf_link_hash_entry
*h
;
998 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1000 h
->plt
.offset
= (bfd_vma
) -1;
1003 /* Initialize an ELF linker hash table. */
1006 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1007 struct elf_link_hash_table
*table
;
1009 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1010 struct bfd_hash_table
*,
1013 table
->dynamic_sections_created
= false;
1014 table
->dynobj
= NULL
;
1015 /* The first dynamic symbol is a dummy. */
1016 table
->dynsymcount
= 1;
1017 table
->dynstr
= NULL
;
1018 table
->bucketcount
= 0;
1019 table
->needed
= NULL
;
1020 table
->runpath
= NULL
;
1022 table
->stab_info
= NULL
;
1023 table
->dynlocal
= NULL
;
1024 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1027 /* Create an ELF linker hash table. */
1029 struct bfd_link_hash_table
*
1030 _bfd_elf_link_hash_table_create (abfd
)
1033 struct elf_link_hash_table
*ret
;
1035 ret
= ((struct elf_link_hash_table
*)
1036 bfd_alloc (abfd
, sizeof (struct elf_link_hash_table
)));
1037 if (ret
== (struct elf_link_hash_table
*) NULL
)
1040 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1042 bfd_release (abfd
, ret
);
1049 /* This is a hook for the ELF emulation code in the generic linker to
1050 tell the backend linker what file name to use for the DT_NEEDED
1051 entry for a dynamic object. The generic linker passes name as an
1052 empty string to indicate that no DT_NEEDED entry should be made. */
1055 bfd_elf_set_dt_needed_name (abfd
, name
)
1059 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1060 && bfd_get_format (abfd
) == bfd_object
)
1061 elf_dt_name (abfd
) = name
;
1065 bfd_elf_set_dt_needed_soname (abfd
, name
)
1069 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1070 && bfd_get_format (abfd
) == bfd_object
)
1071 elf_dt_soname (abfd
) = name
;
1074 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1075 the linker ELF emulation code. */
1077 struct bfd_link_needed_list
*
1078 bfd_elf_get_needed_list (abfd
, info
)
1079 bfd
*abfd ATTRIBUTE_UNUSED
;
1080 struct bfd_link_info
*info
;
1082 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1084 return elf_hash_table (info
)->needed
;
1087 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1088 hook for the linker ELF emulation code. */
1090 struct bfd_link_needed_list
*
1091 bfd_elf_get_runpath_list (abfd
, info
)
1092 bfd
*abfd ATTRIBUTE_UNUSED
;
1093 struct bfd_link_info
*info
;
1095 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1097 return elf_hash_table (info
)->runpath
;
1100 /* Get the name actually used for a dynamic object for a link. This
1101 is the SONAME entry if there is one. Otherwise, it is the string
1102 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1105 bfd_elf_get_dt_soname (abfd
)
1108 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1109 && bfd_get_format (abfd
) == bfd_object
)
1110 return elf_dt_name (abfd
);
1114 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1115 the ELF linker emulation code. */
1118 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1120 struct bfd_link_needed_list
**pneeded
;
1123 bfd_byte
*dynbuf
= NULL
;
1126 bfd_byte
*extdyn
, *extdynend
;
1128 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1132 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1133 || bfd_get_format (abfd
) != bfd_object
)
1136 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1137 if (s
== NULL
|| s
->_raw_size
== 0)
1140 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1144 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1148 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1152 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1154 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1155 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1158 extdynend
= extdyn
+ s
->_raw_size
;
1159 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1161 Elf_Internal_Dyn dyn
;
1163 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1165 if (dyn
.d_tag
== DT_NULL
)
1168 if (dyn
.d_tag
== DT_NEEDED
)
1171 struct bfd_link_needed_list
*l
;
1173 string
= bfd_elf_string_from_elf_section (abfd
, link
,
1178 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, sizeof *l
);
1199 /* Allocate an ELF string table--force the first byte to be zero. */
1201 struct bfd_strtab_hash
*
1202 _bfd_elf_stringtab_init ()
1204 struct bfd_strtab_hash
*ret
;
1206 ret
= _bfd_stringtab_init ();
1211 loc
= _bfd_stringtab_add (ret
, "", true, false);
1212 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1213 if (loc
== (bfd_size_type
) -1)
1215 _bfd_stringtab_free (ret
);
1222 /* ELF .o/exec file reading */
1224 /* Create a new bfd section from an ELF section header. */
1227 bfd_section_from_shdr (abfd
, shindex
)
1229 unsigned int shindex
;
1231 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1232 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1233 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1236 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1238 switch (hdr
->sh_type
)
1241 /* Inactive section. Throw it away. */
1244 case SHT_PROGBITS
: /* Normal section with contents. */
1245 case SHT_DYNAMIC
: /* Dynamic linking information. */
1246 case SHT_NOBITS
: /* .bss section. */
1247 case SHT_HASH
: /* .hash section. */
1248 case SHT_NOTE
: /* .note section. */
1249 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1251 case SHT_SYMTAB
: /* A symbol table */
1252 if (elf_onesymtab (abfd
) == shindex
)
1255 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1256 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1257 elf_onesymtab (abfd
) = shindex
;
1258 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1259 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1260 abfd
->flags
|= HAS_SYMS
;
1262 /* Sometimes a shared object will map in the symbol table. If
1263 SHF_ALLOC is set, and this is a shared object, then we also
1264 treat this section as a BFD section. We can not base the
1265 decision purely on SHF_ALLOC, because that flag is sometimes
1266 set in a relocateable object file, which would confuse the
1268 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1269 && (abfd
->flags
& DYNAMIC
) != 0
1270 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1275 case SHT_DYNSYM
: /* A dynamic symbol table */
1276 if (elf_dynsymtab (abfd
) == shindex
)
1279 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1280 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1281 elf_dynsymtab (abfd
) = shindex
;
1282 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1283 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1284 abfd
->flags
|= HAS_SYMS
;
1286 /* Besides being a symbol table, we also treat this as a regular
1287 section, so that objcopy can handle it. */
1288 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1290 case SHT_STRTAB
: /* A string table */
1291 if (hdr
->bfd_section
!= NULL
)
1293 if (ehdr
->e_shstrndx
== shindex
)
1295 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1296 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1302 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
1304 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1305 if (hdr2
->sh_link
== shindex
)
1307 if (! bfd_section_from_shdr (abfd
, i
))
1309 if (elf_onesymtab (abfd
) == i
)
1311 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1312 elf_elfsections (abfd
)[shindex
] =
1313 &elf_tdata (abfd
)->strtab_hdr
;
1316 if (elf_dynsymtab (abfd
) == i
)
1318 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1319 elf_elfsections (abfd
)[shindex
] = hdr
=
1320 &elf_tdata (abfd
)->dynstrtab_hdr
;
1321 /* We also treat this as a regular section, so
1322 that objcopy can handle it. */
1325 #if 0 /* Not handling other string tables specially right now. */
1326 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1327 /* We have a strtab for some random other section. */
1328 newsect
= (asection
*) hdr2
->bfd_section
;
1331 hdr
->bfd_section
= newsect
;
1332 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1334 elf_elfsections (abfd
)[shindex
] = hdr2
;
1340 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1344 /* *These* do a lot of work -- but build no sections! */
1346 asection
*target_sect
;
1347 Elf_Internal_Shdr
*hdr2
;
1349 /* Check for a bogus link to avoid crashing. */
1350 if (hdr
->sh_link
>= ehdr
->e_shnum
)
1352 ((*_bfd_error_handler
)
1353 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1354 bfd_get_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1355 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1358 /* For some incomprehensible reason Oracle distributes
1359 libraries for Solaris in which some of the objects have
1360 bogus sh_link fields. It would be nice if we could just
1361 reject them, but, unfortunately, some people need to use
1362 them. We scan through the section headers; if we find only
1363 one suitable symbol table, we clobber the sh_link to point
1364 to it. I hope this doesn't break anything. */
1365 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1366 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1372 for (scan
= 1; scan
< ehdr
->e_shnum
; scan
++)
1374 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1375 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1386 hdr
->sh_link
= found
;
1389 /* Get the symbol table. */
1390 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1391 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1394 /* If this reloc section does not use the main symbol table we
1395 don't treat it as a reloc section. BFD can't adequately
1396 represent such a section, so at least for now, we don't
1397 try. We just present it as a normal section. We also
1398 can't use it as a reloc section if it points to the null
1400 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1401 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1403 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1405 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1406 if (target_sect
== NULL
)
1409 if ((target_sect
->flags
& SEC_RELOC
) == 0
1410 || target_sect
->reloc_count
== 0)
1411 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1414 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1415 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, sizeof (*hdr2
));
1416 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1419 elf_elfsections (abfd
)[shindex
] = hdr2
;
1420 target_sect
->reloc_count
+= hdr
->sh_size
/ hdr
->sh_entsize
;
1421 target_sect
->flags
|= SEC_RELOC
;
1422 target_sect
->relocation
= NULL
;
1423 target_sect
->rel_filepos
= hdr
->sh_offset
;
1424 /* In the section to which the relocations apply, mark whether
1425 its relocations are of the REL or RELA variety. */
1426 if (hdr
->sh_size
!= 0)
1427 elf_section_data (target_sect
)->use_rela_p
1428 = (hdr
->sh_type
== SHT_RELA
);
1429 abfd
->flags
|= HAS_RELOC
;
1434 case SHT_GNU_verdef
:
1435 elf_dynverdef (abfd
) = shindex
;
1436 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1437 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1440 case SHT_GNU_versym
:
1441 elf_dynversym (abfd
) = shindex
;
1442 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1443 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1446 case SHT_GNU_verneed
:
1447 elf_dynverref (abfd
) = shindex
;
1448 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1449 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1456 /* Check for any processor-specific section types. */
1458 if (bed
->elf_backend_section_from_shdr
)
1459 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1467 /* Given an ELF section number, retrieve the corresponding BFD
1471 bfd_section_from_elf_index (abfd
, index
)
1475 BFD_ASSERT (index
> 0 && index
< SHN_LORESERVE
);
1476 if (index
>= elf_elfheader (abfd
)->e_shnum
)
1478 return elf_elfsections (abfd
)[index
]->bfd_section
;
1482 _bfd_elf_new_section_hook (abfd
, sec
)
1486 struct bfd_elf_section_data
*sdata
;
1488 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, sizeof (*sdata
));
1491 sec
->used_by_bfd
= (PTR
) sdata
;
1493 /* Indicate whether or not this section should use RELA relocations. */
1495 = get_elf_backend_data (abfd
)->default_use_rela_p
;
1500 /* Create a new bfd section from an ELF program header.
1502 Since program segments have no names, we generate a synthetic name
1503 of the form segment<NUM>, where NUM is generally the index in the
1504 program header table. For segments that are split (see below) we
1505 generate the names segment<NUM>a and segment<NUM>b.
1507 Note that some program segments may have a file size that is different than
1508 (less than) the memory size. All this means is that at execution the
1509 system must allocate the amount of memory specified by the memory size,
1510 but only initialize it with the first "file size" bytes read from the
1511 file. This would occur for example, with program segments consisting
1512 of combined data+bss.
1514 To handle the above situation, this routine generates TWO bfd sections
1515 for the single program segment. The first has the length specified by
1516 the file size of the segment, and the second has the length specified
1517 by the difference between the two sizes. In effect, the segment is split
1518 into it's initialized and uninitialized parts.
1523 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
1525 Elf_Internal_Phdr
*hdr
;
1527 const char *typename
;
1534 split
= ((hdr
->p_memsz
> 0)
1535 && (hdr
->p_filesz
> 0)
1536 && (hdr
->p_memsz
> hdr
->p_filesz
));
1537 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
1538 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1541 strcpy (name
, namebuf
);
1542 newsect
= bfd_make_section (abfd
, name
);
1543 if (newsect
== NULL
)
1545 newsect
->vma
= hdr
->p_vaddr
;
1546 newsect
->lma
= hdr
->p_paddr
;
1547 newsect
->_raw_size
= hdr
->p_filesz
;
1548 newsect
->filepos
= hdr
->p_offset
;
1549 newsect
->flags
|= SEC_HAS_CONTENTS
;
1550 if (hdr
->p_type
== PT_LOAD
)
1552 newsect
->flags
|= SEC_ALLOC
;
1553 newsect
->flags
|= SEC_LOAD
;
1554 if (hdr
->p_flags
& PF_X
)
1556 /* FIXME: all we known is that it has execute PERMISSION,
1558 newsect
->flags
|= SEC_CODE
;
1561 if (!(hdr
->p_flags
& PF_W
))
1563 newsect
->flags
|= SEC_READONLY
;
1568 sprintf (namebuf
, "%s%db", typename
, index
);
1569 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1572 strcpy (name
, namebuf
);
1573 newsect
= bfd_make_section (abfd
, name
);
1574 if (newsect
== NULL
)
1576 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
1577 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
1578 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
1579 if (hdr
->p_type
== PT_LOAD
)
1581 newsect
->flags
|= SEC_ALLOC
;
1582 if (hdr
->p_flags
& PF_X
)
1583 newsect
->flags
|= SEC_CODE
;
1585 if (!(hdr
->p_flags
& PF_W
))
1586 newsect
->flags
|= SEC_READONLY
;
1593 bfd_section_from_phdr (abfd
, hdr
, index
)
1595 Elf_Internal_Phdr
*hdr
;
1598 struct elf_backend_data
*bed
;
1600 switch (hdr
->p_type
)
1603 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
1606 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
1609 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
1612 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
1615 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
1617 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
1622 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
1625 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
1628 /* Check for any processor-specific program segment types.
1629 If no handler for them, default to making "segment" sections. */
1630 bed
= get_elf_backend_data (abfd
);
1631 if (bed
->elf_backend_section_from_phdr
)
1632 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
1634 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
1638 /* Initialize REL_HDR, the section-header for new section, containing
1639 relocations against ASECT. If USE_RELA_P is true, we use RELA
1640 relocations; otherwise, we use REL relocations. */
1643 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
1645 Elf_Internal_Shdr
*rel_hdr
;
1650 struct elf_backend_data
*bed
;
1652 bed
= get_elf_backend_data (abfd
);
1653 name
= bfd_alloc (abfd
, sizeof ".rela" + strlen (asect
->name
));
1656 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
1658 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd
), name
,
1660 if (rel_hdr
->sh_name
== (unsigned int) -1)
1662 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1663 rel_hdr
->sh_entsize
= (use_rela_p
1664 ? bed
->s
->sizeof_rela
1665 : bed
->s
->sizeof_rel
);
1666 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
1667 rel_hdr
->sh_flags
= 0;
1668 rel_hdr
->sh_addr
= 0;
1669 rel_hdr
->sh_size
= 0;
1670 rel_hdr
->sh_offset
= 0;
1675 /* Set up an ELF internal section header for a section. */
1678 elf_fake_sections (abfd
, asect
, failedptrarg
)
1683 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1684 boolean
*failedptr
= (boolean
*) failedptrarg
;
1685 Elf_Internal_Shdr
*this_hdr
;
1689 /* We already failed; just get out of the bfd_map_over_sections
1694 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1696 this_hdr
->sh_name
= (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd
),
1699 if (this_hdr
->sh_name
== (unsigned long) -1)
1705 this_hdr
->sh_flags
= 0;
1707 if ((asect
->flags
& SEC_ALLOC
) != 0
1708 || asect
->user_set_vma
)
1709 this_hdr
->sh_addr
= asect
->vma
;
1711 this_hdr
->sh_addr
= 0;
1713 this_hdr
->sh_offset
= 0;
1714 this_hdr
->sh_size
= asect
->_raw_size
;
1715 this_hdr
->sh_link
= 0;
1716 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1717 /* The sh_entsize and sh_info fields may have been set already by
1718 copy_private_section_data. */
1720 this_hdr
->bfd_section
= asect
;
1721 this_hdr
->contents
= NULL
;
1723 /* FIXME: This should not be based on section names. */
1724 if (strcmp (asect
->name
, ".dynstr") == 0)
1725 this_hdr
->sh_type
= SHT_STRTAB
;
1726 else if (strcmp (asect
->name
, ".hash") == 0)
1728 this_hdr
->sh_type
= SHT_HASH
;
1729 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
1731 else if (strcmp (asect
->name
, ".dynsym") == 0)
1733 this_hdr
->sh_type
= SHT_DYNSYM
;
1734 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
1736 else if (strcmp (asect
->name
, ".dynamic") == 0)
1738 this_hdr
->sh_type
= SHT_DYNAMIC
;
1739 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
1741 else if (strncmp (asect
->name
, ".rela", 5) == 0
1742 && get_elf_backend_data (abfd
)->may_use_rela_p
)
1744 this_hdr
->sh_type
= SHT_RELA
;
1745 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
1747 else if (strncmp (asect
->name
, ".rel", 4) == 0
1748 && get_elf_backend_data (abfd
)->may_use_rel_p
)
1750 this_hdr
->sh_type
= SHT_REL
;
1751 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
1753 else if (strncmp (asect
->name
, ".note", 5) == 0)
1754 this_hdr
->sh_type
= SHT_NOTE
;
1755 else if (strncmp (asect
->name
, ".stab", 5) == 0
1756 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
1757 this_hdr
->sh_type
= SHT_STRTAB
;
1758 else if (strcmp (asect
->name
, ".gnu.version") == 0)
1760 this_hdr
->sh_type
= SHT_GNU_versym
;
1761 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
1763 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
1765 this_hdr
->sh_type
= SHT_GNU_verdef
;
1766 this_hdr
->sh_entsize
= 0;
1767 /* objcopy or strip will copy over sh_info, but may not set
1768 cverdefs. The linker will set cverdefs, but sh_info will be
1770 if (this_hdr
->sh_info
== 0)
1771 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
1773 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
1774 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
1776 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
1778 this_hdr
->sh_type
= SHT_GNU_verneed
;
1779 this_hdr
->sh_entsize
= 0;
1780 /* objcopy or strip will copy over sh_info, but may not set
1781 cverrefs. The linker will set cverrefs, but sh_info will be
1783 if (this_hdr
->sh_info
== 0)
1784 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
1786 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
1787 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
1789 else if ((asect
->flags
& SEC_ALLOC
) != 0
1790 && ((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0))
1791 this_hdr
->sh_type
= SHT_NOBITS
;
1793 this_hdr
->sh_type
= SHT_PROGBITS
;
1795 if ((asect
->flags
& SEC_ALLOC
) != 0)
1796 this_hdr
->sh_flags
|= SHF_ALLOC
;
1797 if ((asect
->flags
& SEC_READONLY
) == 0)
1798 this_hdr
->sh_flags
|= SHF_WRITE
;
1799 if ((asect
->flags
& SEC_CODE
) != 0)
1800 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1802 /* Check for processor-specific section types. */
1803 if (bed
->elf_backend_fake_sections
)
1804 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1806 /* If the section has relocs, set up a section header for the
1807 SHT_REL[A] section. If two relocation sections are required for
1808 this section, it is up to the processor-specific back-end to
1809 create the other. */
1810 if ((asect
->flags
& SEC_RELOC
) != 0
1811 && !_bfd_elf_init_reloc_shdr (abfd
,
1812 &elf_section_data (asect
)->rel_hdr
,
1814 elf_section_data (asect
)->use_rela_p
))
1818 /* Assign all ELF section numbers. The dummy first section is handled here
1819 too. The link/info pointers for the standard section types are filled
1820 in here too, while we're at it. */
1823 assign_section_numbers (abfd
)
1826 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1828 unsigned int section_number
;
1829 Elf_Internal_Shdr
**i_shdrp
;
1833 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1835 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1837 d
->this_idx
= section_number
++;
1838 if ((sec
->flags
& SEC_RELOC
) == 0)
1841 d
->rel_idx
= section_number
++;
1844 d
->rel_idx2
= section_number
++;
1849 t
->shstrtab_section
= section_number
++;
1850 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
1851 t
->shstrtab_hdr
.sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1853 if (bfd_get_symcount (abfd
) > 0)
1855 t
->symtab_section
= section_number
++;
1856 t
->strtab_section
= section_number
++;
1859 elf_elfheader (abfd
)->e_shnum
= section_number
;
1861 /* Set up the list of section header pointers, in agreement with the
1863 i_shdrp
= ((Elf_Internal_Shdr
**)
1864 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*)));
1865 if (i_shdrp
== NULL
)
1868 i_shdrp
[0] = ((Elf_Internal_Shdr
*)
1869 bfd_alloc (abfd
, sizeof (Elf_Internal_Shdr
)));
1870 if (i_shdrp
[0] == NULL
)
1872 bfd_release (abfd
, i_shdrp
);
1875 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
1877 elf_elfsections (abfd
) = i_shdrp
;
1879 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1880 if (bfd_get_symcount (abfd
) > 0)
1882 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1883 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1884 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1886 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1888 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1892 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1893 if (d
->rel_idx
!= 0)
1894 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1895 if (d
->rel_idx2
!= 0)
1896 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
1898 /* Fill in the sh_link and sh_info fields while we're at it. */
1900 /* sh_link of a reloc section is the section index of the symbol
1901 table. sh_info is the section index of the section to which
1902 the relocation entries apply. */
1903 if (d
->rel_idx
!= 0)
1905 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1906 d
->rel_hdr
.sh_info
= d
->this_idx
;
1908 if (d
->rel_idx2
!= 0)
1910 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
1911 d
->rel_hdr2
->sh_info
= d
->this_idx
;
1914 switch (d
->this_hdr
.sh_type
)
1918 /* A reloc section which we are treating as a normal BFD
1919 section. sh_link is the section index of the symbol
1920 table. sh_info is the section index of the section to
1921 which the relocation entries apply. We assume that an
1922 allocated reloc section uses the dynamic symbol table.
1923 FIXME: How can we be sure? */
1924 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1926 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1928 /* We look up the section the relocs apply to by name. */
1930 if (d
->this_hdr
.sh_type
== SHT_REL
)
1934 s
= bfd_get_section_by_name (abfd
, name
);
1936 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
1940 /* We assume that a section named .stab*str is a stabs
1941 string section. We look for a section with the same name
1942 but without the trailing ``str'', and set its sh_link
1943 field to point to this section. */
1944 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
1945 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
1950 len
= strlen (sec
->name
);
1951 alc
= (char *) bfd_malloc (len
- 2);
1954 strncpy (alc
, sec
->name
, len
- 3);
1955 alc
[len
- 3] = '\0';
1956 s
= bfd_get_section_by_name (abfd
, alc
);
1960 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
1962 /* This is a .stab section. */
1963 elf_section_data (s
)->this_hdr
.sh_entsize
=
1964 4 + 2 * bfd_get_arch_size (abfd
) / 8;
1971 case SHT_GNU_verneed
:
1972 case SHT_GNU_verdef
:
1973 /* sh_link is the section header index of the string table
1974 used for the dynamic entries, or the symbol table, or the
1976 s
= bfd_get_section_by_name (abfd
, ".dynstr");
1978 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1982 case SHT_GNU_versym
:
1983 /* sh_link is the section header index of the symbol table
1984 this hash table or version table is for. */
1985 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1987 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1995 /* Map symbol from it's internal number to the external number, moving
1996 all local symbols to be at the head of the list. */
1999 sym_is_global (abfd
, sym
)
2003 /* If the backend has a special mapping, use it. */
2004 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2005 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2008 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2009 || bfd_is_und_section (bfd_get_section (sym
))
2010 || bfd_is_com_section (bfd_get_section (sym
)));
2014 elf_map_symbols (abfd
)
2017 int symcount
= bfd_get_symcount (abfd
);
2018 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2019 asymbol
**sect_syms
;
2021 int num_globals
= 0;
2022 int num_locals2
= 0;
2023 int num_globals2
= 0;
2025 int num_sections
= 0;
2032 fprintf (stderr
, "elf_map_symbols\n");
2036 /* Add a section symbol for each BFD section. FIXME: Is this really
2038 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2040 if (max_index
< asect
->index
)
2041 max_index
= asect
->index
;
2045 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
2046 if (sect_syms
== NULL
)
2048 elf_section_syms (abfd
) = sect_syms
;
2050 for (idx
= 0; idx
< symcount
; idx
++)
2054 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2061 if (sec
->owner
!= NULL
)
2063 if (sec
->owner
!= abfd
)
2065 if (sec
->output_offset
!= 0)
2068 sec
= sec
->output_section
;
2070 /* Empty sections in the input files may have had a section
2071 symbol created for them. (See the comment near the end of
2072 _bfd_generic_link_output_symbols in linker.c). If the linker
2073 script discards such sections then we will reach this point.
2074 Since we know that we cannot avoid this case, we detect it
2075 and skip the abort and the assignment to the sect_syms array.
2076 To reproduce this particular case try running the linker
2077 testsuite test ld-scripts/weak.exp for an ELF port that uses
2078 the generic linker. */
2079 if (sec
->owner
== NULL
)
2082 BFD_ASSERT (sec
->owner
== abfd
);
2084 sect_syms
[sec
->index
] = syms
[idx
];
2089 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2091 if (sect_syms
[asect
->index
] != NULL
)
2094 sym
= bfd_make_empty_symbol (abfd
);
2097 sym
->the_bfd
= abfd
;
2098 sym
->name
= asect
->name
;
2100 /* Set the flags to 0 to indicate that this one was newly added. */
2102 sym
->section
= asect
;
2103 sect_syms
[asect
->index
] = sym
;
2107 _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
2108 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
2112 /* Classify all of the symbols. */
2113 for (idx
= 0; idx
< symcount
; idx
++)
2115 if (!sym_is_global (abfd
, syms
[idx
]))
2120 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2122 if (sect_syms
[asect
->index
] != NULL
2123 && sect_syms
[asect
->index
]->flags
== 0)
2125 sect_syms
[asect
->index
]->flags
= BSF_SECTION_SYM
;
2126 if (!sym_is_global (abfd
, sect_syms
[asect
->index
]))
2130 sect_syms
[asect
->index
]->flags
= 0;
2134 /* Now sort the symbols so the local symbols are first. */
2135 new_syms
= ((asymbol
**)
2137 (num_locals
+ num_globals
) * sizeof (asymbol
*)));
2138 if (new_syms
== NULL
)
2141 for (idx
= 0; idx
< symcount
; idx
++)
2143 asymbol
*sym
= syms
[idx
];
2146 if (!sym_is_global (abfd
, sym
))
2149 i
= num_locals
+ num_globals2
++;
2151 sym
->udata
.i
= i
+ 1;
2153 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2155 if (sect_syms
[asect
->index
] != NULL
2156 && sect_syms
[asect
->index
]->flags
== 0)
2158 asymbol
*sym
= sect_syms
[asect
->index
];
2161 sym
->flags
= BSF_SECTION_SYM
;
2162 if (!sym_is_global (abfd
, sym
))
2165 i
= num_locals
+ num_globals2
++;
2167 sym
->udata
.i
= i
+ 1;
2171 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2173 elf_num_locals (abfd
) = num_locals
;
2174 elf_num_globals (abfd
) = num_globals
;
2178 /* Align to the maximum file alignment that could be required for any
2179 ELF data structure. */
2181 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2182 static INLINE file_ptr
2183 align_file_position (off
, align
)
2187 return (off
+ align
- 1) & ~(align
- 1);
2190 /* Assign a file position to a section, optionally aligning to the
2191 required section alignment. */
2194 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2195 Elf_Internal_Shdr
*i_shdrp
;
2203 al
= i_shdrp
->sh_addralign
;
2205 offset
= BFD_ALIGN (offset
, al
);
2207 i_shdrp
->sh_offset
= offset
;
2208 if (i_shdrp
->bfd_section
!= NULL
)
2209 i_shdrp
->bfd_section
->filepos
= offset
;
2210 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2211 offset
+= i_shdrp
->sh_size
;
2215 /* Compute the file positions we are going to put the sections at, and
2216 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2217 is not NULL, this is being called by the ELF backend linker. */
2220 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2222 struct bfd_link_info
*link_info
;
2224 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2226 struct bfd_strtab_hash
*strtab
;
2227 Elf_Internal_Shdr
*shstrtab_hdr
;
2229 if (abfd
->output_has_begun
)
2232 /* Do any elf backend specific processing first. */
2233 if (bed
->elf_backend_begin_write_processing
)
2234 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2236 if (! prep_headers (abfd
))
2239 /* Post process the headers if necessary. */
2240 if (bed
->elf_backend_post_process_headers
)
2241 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2244 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2248 if (!assign_section_numbers (abfd
))
2251 /* The backend linker builds symbol table information itself. */
2252 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2254 /* Non-zero if doing a relocatable link. */
2255 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2257 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2261 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2262 /* sh_name was set in prep_headers. */
2263 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2264 shstrtab_hdr
->sh_flags
= 0;
2265 shstrtab_hdr
->sh_addr
= 0;
2266 shstrtab_hdr
->sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
2267 shstrtab_hdr
->sh_entsize
= 0;
2268 shstrtab_hdr
->sh_link
= 0;
2269 shstrtab_hdr
->sh_info
= 0;
2270 /* sh_offset is set in assign_file_positions_except_relocs. */
2271 shstrtab_hdr
->sh_addralign
= 1;
2273 if (!assign_file_positions_except_relocs (abfd
))
2276 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2279 Elf_Internal_Shdr
*hdr
;
2281 off
= elf_tdata (abfd
)->next_file_pos
;
2283 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2284 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2286 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2287 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2289 elf_tdata (abfd
)->next_file_pos
= off
;
2291 /* Now that we know where the .strtab section goes, write it
2293 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
2294 || ! _bfd_stringtab_emit (abfd
, strtab
))
2296 _bfd_stringtab_free (strtab
);
2299 abfd
->output_has_begun
= true;
2304 /* Create a mapping from a set of sections to a program segment. */
2306 static INLINE
struct elf_segment_map
*
2307 make_mapping (abfd
, sections
, from
, to
, phdr
)
2309 asection
**sections
;
2314 struct elf_segment_map
*m
;
2318 m
= ((struct elf_segment_map
*)
2320 (sizeof (struct elf_segment_map
)
2321 + (to
- from
- 1) * sizeof (asection
*))));
2325 m
->p_type
= PT_LOAD
;
2326 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
2327 m
->sections
[i
- from
] = *hdrpp
;
2328 m
->count
= to
- from
;
2330 if (from
== 0 && phdr
)
2332 /* Include the headers in the first PT_LOAD segment. */
2333 m
->includes_filehdr
= 1;
2334 m
->includes_phdrs
= 1;
2340 /* Set up a mapping from BFD sections to program segments. */
2343 map_sections_to_segments (abfd
)
2346 asection
**sections
= NULL
;
2350 struct elf_segment_map
*mfirst
;
2351 struct elf_segment_map
**pm
;
2352 struct elf_segment_map
*m
;
2354 unsigned int phdr_index
;
2355 bfd_vma maxpagesize
;
2357 boolean phdr_in_segment
= true;
2361 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2364 if (bfd_count_sections (abfd
) == 0)
2367 /* Select the allocated sections, and sort them. */
2369 sections
= (asection
**) bfd_malloc (bfd_count_sections (abfd
)
2370 * sizeof (asection
*));
2371 if (sections
== NULL
)
2375 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2377 if ((s
->flags
& SEC_ALLOC
) != 0)
2383 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
2386 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
2388 /* Build the mapping. */
2393 /* If we have a .interp section, then create a PT_PHDR segment for
2394 the program headers and a PT_INTERP segment for the .interp
2396 s
= bfd_get_section_by_name (abfd
, ".interp");
2397 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2399 m
= ((struct elf_segment_map
*)
2400 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2404 m
->p_type
= PT_PHDR
;
2405 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2406 m
->p_flags
= PF_R
| PF_X
;
2407 m
->p_flags_valid
= 1;
2408 m
->includes_phdrs
= 1;
2413 m
= ((struct elf_segment_map
*)
2414 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2418 m
->p_type
= PT_INTERP
;
2426 /* Look through the sections. We put sections in the same program
2427 segment when the start of the second section can be placed within
2428 a few bytes of the end of the first section. */
2431 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2433 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
2435 && (dynsec
->flags
& SEC_LOAD
) == 0)
2438 /* Deal with -Ttext or something similar such that the first section
2439 is not adjacent to the program headers. This is an
2440 approximation, since at this point we don't know exactly how many
2441 program headers we will need. */
2444 bfd_size_type phdr_size
;
2446 phdr_size
= elf_tdata (abfd
)->program_header_size
;
2448 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
2449 if ((abfd
->flags
& D_PAGED
) == 0
2450 || sections
[0]->lma
< phdr_size
2451 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
2452 phdr_in_segment
= false;
2455 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
2458 boolean new_segment
;
2462 /* See if this section and the last one will fit in the same
2465 if (last_hdr
== NULL
)
2467 /* If we don't have a segment yet, then we don't need a new
2468 one (we build the last one after this loop). */
2469 new_segment
= false;
2471 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
2473 /* If this section has a different relation between the
2474 virtual address and the load address, then we need a new
2478 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2479 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
2481 /* If putting this section in this segment would force us to
2482 skip a page in the segment, then we need a new segment. */
2485 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
2486 && (hdr
->flags
& SEC_LOAD
) != 0)
2488 /* We don't want to put a loadable section after a
2489 nonloadable section in the same segment. */
2492 else if ((abfd
->flags
& D_PAGED
) == 0)
2494 /* If the file is not demand paged, which means that we
2495 don't require the sections to be correctly aligned in the
2496 file, then there is no other reason for a new segment. */
2497 new_segment
= false;
2500 && (hdr
->flags
& SEC_READONLY
) == 0
2501 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2504 /* We don't want to put a writable section in a read only
2505 segment, unless they are on the same page in memory
2506 anyhow. We already know that the last section does not
2507 bring us past the current section on the page, so the
2508 only case in which the new section is not on the same
2509 page as the previous section is when the previous section
2510 ends precisely on a page boundary. */
2515 /* Otherwise, we can use the same segment. */
2516 new_segment
= false;
2521 if ((hdr
->flags
& SEC_READONLY
) == 0)
2527 /* We need a new program segment. We must create a new program
2528 header holding all the sections from phdr_index until hdr. */
2530 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2537 if ((hdr
->flags
& SEC_READONLY
) == 0)
2544 phdr_in_segment
= false;
2547 /* Create a final PT_LOAD program segment. */
2548 if (last_hdr
!= NULL
)
2550 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2558 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2561 m
= ((struct elf_segment_map
*)
2562 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2566 m
->p_type
= PT_DYNAMIC
;
2568 m
->sections
[0] = dynsec
;
2574 /* For each loadable .note section, add a PT_NOTE segment. We don't
2575 use bfd_get_section_by_name, because if we link together
2576 nonloadable .note sections and loadable .note sections, we will
2577 generate two .note sections in the output file. FIXME: Using
2578 names for section types is bogus anyhow. */
2579 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2581 if ((s
->flags
& SEC_LOAD
) != 0
2582 && strncmp (s
->name
, ".note", 5) == 0)
2584 m
= ((struct elf_segment_map
*)
2585 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2589 m
->p_type
= PT_NOTE
;
2601 elf_tdata (abfd
)->segment_map
= mfirst
;
2605 if (sections
!= NULL
)
2610 /* Sort sections by address. */
2613 elf_sort_sections (arg1
, arg2
)
2617 const asection
*sec1
= *(const asection
**) arg1
;
2618 const asection
*sec2
= *(const asection
**) arg2
;
2620 /* Sort by LMA first, since this is the address used to
2621 place the section into a segment. */
2622 if (sec1
->lma
< sec2
->lma
)
2624 else if (sec1
->lma
> sec2
->lma
)
2627 /* Then sort by VMA. Normally the LMA and the VMA will be
2628 the same, and this will do nothing. */
2629 if (sec1
->vma
< sec2
->vma
)
2631 else if (sec1
->vma
> sec2
->vma
)
2634 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2636 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2641 return sec1
->target_index
- sec2
->target_index
;
2651 /* Sort by size, to put zero sized sections before others at the
2654 if (sec1
->_raw_size
< sec2
->_raw_size
)
2656 if (sec1
->_raw_size
> sec2
->_raw_size
)
2659 return sec1
->target_index
- sec2
->target_index
;
2662 /* Assign file positions to the sections based on the mapping from
2663 sections to segments. This function also sets up some fields in
2664 the file header, and writes out the program headers. */
2667 assign_file_positions_for_segments (abfd
)
2670 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2672 struct elf_segment_map
*m
;
2674 Elf_Internal_Phdr
*phdrs
;
2676 bfd_vma filehdr_vaddr
, filehdr_paddr
;
2677 bfd_vma phdrs_vaddr
, phdrs_paddr
;
2678 Elf_Internal_Phdr
*p
;
2680 if (elf_tdata (abfd
)->segment_map
== NULL
)
2682 if (! map_sections_to_segments (abfd
))
2686 if (bed
->elf_backend_modify_segment_map
)
2688 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
2693 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2696 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
2697 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
2698 elf_elfheader (abfd
)->e_phnum
= count
;
2703 /* If we already counted the number of program segments, make sure
2704 that we allocated enough space. This happens when SIZEOF_HEADERS
2705 is used in a linker script. */
2706 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
2707 if (alloc
!= 0 && count
> alloc
)
2709 ((*_bfd_error_handler
)
2710 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
2711 bfd_get_filename (abfd
), alloc
, count
));
2712 bfd_set_error (bfd_error_bad_value
);
2719 phdrs
= ((Elf_Internal_Phdr
*)
2720 bfd_alloc (abfd
, alloc
* sizeof (Elf_Internal_Phdr
)));
2724 off
= bed
->s
->sizeof_ehdr
;
2725 off
+= alloc
* bed
->s
->sizeof_phdr
;
2732 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2739 /* If elf_segment_map is not from map_sections_to_segments, the
2740 sections may not be correctly ordered. */
2742 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
2745 p
->p_type
= m
->p_type
;
2746 p
->p_flags
= m
->p_flags
;
2748 if (p
->p_type
== PT_LOAD
2750 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
2752 if ((abfd
->flags
& D_PAGED
) != 0)
2753 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
2756 bfd_size_type align
;
2759 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2761 bfd_size_type secalign
;
2763 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
2764 if (secalign
> align
)
2768 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
2775 p
->p_vaddr
= m
->sections
[0]->vma
;
2777 if (m
->p_paddr_valid
)
2778 p
->p_paddr
= m
->p_paddr
;
2779 else if (m
->count
== 0)
2782 p
->p_paddr
= m
->sections
[0]->lma
;
2784 if (p
->p_type
== PT_LOAD
2785 && (abfd
->flags
& D_PAGED
) != 0)
2786 p
->p_align
= bed
->maxpagesize
;
2787 else if (m
->count
== 0)
2788 p
->p_align
= bed
->s
->file_align
;
2796 if (m
->includes_filehdr
)
2798 if (! m
->p_flags_valid
)
2801 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
2802 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
2805 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2807 if (p
->p_vaddr
< (bfd_vma
) off
)
2809 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
2810 bfd_get_filename (abfd
));
2811 bfd_set_error (bfd_error_bad_value
);
2816 if (! m
->p_paddr_valid
)
2819 if (p
->p_type
== PT_LOAD
)
2821 filehdr_vaddr
= p
->p_vaddr
;
2822 filehdr_paddr
= p
->p_paddr
;
2826 if (m
->includes_phdrs
)
2828 if (! m
->p_flags_valid
)
2831 if (m
->includes_filehdr
)
2833 if (p
->p_type
== PT_LOAD
)
2835 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
2836 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
2841 p
->p_offset
= bed
->s
->sizeof_ehdr
;
2845 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2846 p
->p_vaddr
-= off
- p
->p_offset
;
2847 if (! m
->p_paddr_valid
)
2848 p
->p_paddr
-= off
- p
->p_offset
;
2851 if (p
->p_type
== PT_LOAD
)
2853 phdrs_vaddr
= p
->p_vaddr
;
2854 phdrs_paddr
= p
->p_paddr
;
2857 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
2860 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
2861 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
2864 if (p
->p_type
== PT_LOAD
2865 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
2867 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
2873 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
2874 p
->p_filesz
+= adjust
;
2875 p
->p_memsz
+= adjust
;
2881 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2885 bfd_size_type align
;
2889 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
2891 /* The section may have artificial alignment forced by a
2892 link script. Notice this case by the gap between the
2893 cumulative phdr vma and the section's vma. */
2894 if (p
->p_vaddr
+ p
->p_memsz
< sec
->vma
)
2896 bfd_vma adjust
= sec
->vma
- (p
->p_vaddr
+ p
->p_memsz
);
2898 p
->p_memsz
+= adjust
;
2901 if ((flags
& SEC_LOAD
) != 0)
2902 p
->p_filesz
+= adjust
;
2905 if (p
->p_type
== PT_LOAD
)
2907 bfd_signed_vma adjust
;
2909 if ((flags
& SEC_LOAD
) != 0)
2911 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
2915 else if ((flags
& SEC_ALLOC
) != 0)
2917 /* The section VMA must equal the file position
2918 modulo the page size. FIXME: I'm not sure if
2919 this adjustment is really necessary. We used to
2920 not have the SEC_LOAD case just above, and then
2921 this was necessary, but now I'm not sure. */
2922 if ((abfd
->flags
& D_PAGED
) != 0)
2923 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
2925 adjust
= (sec
->vma
- voff
) % align
;
2934 (* _bfd_error_handler
)
2935 (_("Error: First section in segment (%s) starts at 0x%x"),
2936 bfd_section_name (abfd
, sec
), sec
->lma
);
2937 (* _bfd_error_handler
)
2938 (_(" whereas segment starts at 0x%x"),
2943 p
->p_memsz
+= adjust
;
2946 if ((flags
& SEC_LOAD
) != 0)
2947 p
->p_filesz
+= adjust
;
2952 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
2953 used in a linker script we may have a section with
2954 SEC_LOAD clear but which is supposed to have
2956 if ((flags
& SEC_LOAD
) != 0
2957 || (flags
& SEC_HAS_CONTENTS
) != 0)
2958 off
+= sec
->_raw_size
;
2960 if ((flags
& SEC_ALLOC
) != 0)
2961 voff
+= sec
->_raw_size
;
2964 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
2966 /* The actual "note" segment has i == 0.
2967 This is the one that actually contains everything. */
2971 p
->p_filesz
= sec
->_raw_size
;
2972 off
+= sec
->_raw_size
;
2977 /* Fake sections -- don't need to be written. */
2980 flags
= sec
->flags
= 0;
2987 p
->p_memsz
+= sec
->_raw_size
;
2989 if ((flags
& SEC_LOAD
) != 0)
2990 p
->p_filesz
+= sec
->_raw_size
;
2992 if (align
> p
->p_align
2993 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
2997 if (! m
->p_flags_valid
)
3000 if ((flags
& SEC_CODE
) != 0)
3002 if ((flags
& SEC_READONLY
) == 0)
3008 /* Now that we have set the section file positions, we can set up
3009 the file positions for the non PT_LOAD segments. */
3010 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3014 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3016 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3017 p
->p_offset
= m
->sections
[0]->filepos
;
3021 if (m
->includes_filehdr
)
3023 p
->p_vaddr
= filehdr_vaddr
;
3024 if (! m
->p_paddr_valid
)
3025 p
->p_paddr
= filehdr_paddr
;
3027 else if (m
->includes_phdrs
)
3029 p
->p_vaddr
= phdrs_vaddr
;
3030 if (! m
->p_paddr_valid
)
3031 p
->p_paddr
= phdrs_paddr
;
3036 /* Clear out any program headers we allocated but did not use. */
3037 for (; count
< alloc
; count
++, p
++)
3039 memset (p
, 0, sizeof *p
);
3040 p
->p_type
= PT_NULL
;
3043 elf_tdata (abfd
)->phdr
= phdrs
;
3045 elf_tdata (abfd
)->next_file_pos
= off
;
3047 /* Write out the program headers. */
3048 if (bfd_seek (abfd
, bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3049 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3055 /* Get the size of the program header.
3057 If this is called by the linker before any of the section VMA's are set, it
3058 can't calculate the correct value for a strange memory layout. This only
3059 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3060 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3061 data segment (exclusive of .interp and .dynamic).
3063 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3064 will be two segments. */
3066 static bfd_size_type
3067 get_program_header_size (abfd
)
3072 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3074 /* We can't return a different result each time we're called. */
3075 if (elf_tdata (abfd
)->program_header_size
!= 0)
3076 return elf_tdata (abfd
)->program_header_size
;
3078 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3080 struct elf_segment_map
*m
;
3083 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3085 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3086 return elf_tdata (abfd
)->program_header_size
;
3089 /* Assume we will need exactly two PT_LOAD segments: one for text
3090 and one for data. */
3093 s
= bfd_get_section_by_name (abfd
, ".interp");
3094 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3096 /* If we have a loadable interpreter section, we need a
3097 PT_INTERP segment. In this case, assume we also need a
3098 PT_PHDR segment, although that may not be true for all
3103 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3105 /* We need a PT_DYNAMIC segment. */
3109 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3111 if ((s
->flags
& SEC_LOAD
) != 0
3112 && strncmp (s
->name
, ".note", 5) == 0)
3114 /* We need a PT_NOTE segment. */
3119 /* Let the backend count up any program headers it might need. */
3120 if (bed
->elf_backend_additional_program_headers
)
3124 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3130 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3131 return elf_tdata (abfd
)->program_header_size
;
3134 /* Work out the file positions of all the sections. This is called by
3135 _bfd_elf_compute_section_file_positions. All the section sizes and
3136 VMAs must be known before this is called.
3138 We do not consider reloc sections at this point, unless they form
3139 part of the loadable image. Reloc sections are assigned file
3140 positions in assign_file_positions_for_relocs, which is called by
3141 write_object_contents and final_link.
3143 We also don't set the positions of the .symtab and .strtab here. */
3146 assign_file_positions_except_relocs (abfd
)
3149 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
3150 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
3151 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
3153 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3155 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
3156 && bfd_get_format (abfd
) != bfd_core
)
3158 Elf_Internal_Shdr
**hdrpp
;
3161 /* Start after the ELF header. */
3162 off
= i_ehdrp
->e_ehsize
;
3164 /* We are not creating an executable, which means that we are
3165 not creating a program header, and that the actual order of
3166 the sections in the file is unimportant. */
3167 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3169 Elf_Internal_Shdr
*hdr
;
3172 if (hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
3174 hdr
->sh_offset
= -1;
3177 if (i
== tdata
->symtab_section
3178 || i
== tdata
->strtab_section
)
3180 hdr
->sh_offset
= -1;
3184 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3190 Elf_Internal_Shdr
**hdrpp
;
3192 /* Assign file positions for the loaded sections based on the
3193 assignment of sections to segments. */
3194 if (! assign_file_positions_for_segments (abfd
))
3197 /* Assign file positions for the other sections. */
3199 off
= elf_tdata (abfd
)->next_file_pos
;
3200 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3202 Elf_Internal_Shdr
*hdr
;
3205 if (hdr
->bfd_section
!= NULL
3206 && hdr
->bfd_section
->filepos
!= 0)
3207 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
3208 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
3210 ((*_bfd_error_handler
)
3211 (_("%s: warning: allocated section `%s' not in segment"),
3212 bfd_get_filename (abfd
),
3213 (hdr
->bfd_section
== NULL
3215 : hdr
->bfd_section
->name
)));
3216 if ((abfd
->flags
& D_PAGED
) != 0)
3217 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
3219 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
3220 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
3223 else if (hdr
->sh_type
== SHT_REL
3224 || hdr
->sh_type
== SHT_RELA
3225 || hdr
== i_shdrpp
[tdata
->symtab_section
]
3226 || hdr
== i_shdrpp
[tdata
->strtab_section
])
3227 hdr
->sh_offset
= -1;
3229 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3233 /* Place the section headers. */
3234 off
= align_file_position (off
, bed
->s
->file_align
);
3235 i_ehdrp
->e_shoff
= off
;
3236 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
3238 elf_tdata (abfd
)->next_file_pos
= off
;
3247 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3248 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
3249 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
3251 struct bfd_strtab_hash
*shstrtab
;
3252 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3254 i_ehdrp
= elf_elfheader (abfd
);
3255 i_shdrp
= elf_elfsections (abfd
);
3257 shstrtab
= _bfd_elf_stringtab_init ();
3258 if (shstrtab
== NULL
)
3261 elf_shstrtab (abfd
) = shstrtab
;
3263 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
3264 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
3265 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
3266 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
3268 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
3269 i_ehdrp
->e_ident
[EI_DATA
] =
3270 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
3271 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
3273 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_NONE
;
3274 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 0;
3276 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
3277 i_ehdrp
->e_ident
[count
] = 0;
3279 if ((abfd
->flags
& DYNAMIC
) != 0)
3280 i_ehdrp
->e_type
= ET_DYN
;
3281 else if ((abfd
->flags
& EXEC_P
) != 0)
3282 i_ehdrp
->e_type
= ET_EXEC
;
3283 else if (bfd_get_format (abfd
) == bfd_core
)
3284 i_ehdrp
->e_type
= ET_CORE
;
3286 i_ehdrp
->e_type
= ET_REL
;
3288 switch (bfd_get_arch (abfd
))
3290 case bfd_arch_unknown
:
3291 i_ehdrp
->e_machine
= EM_NONE
;
3293 case bfd_arch_sparc
:
3294 if (bfd_get_arch_size (abfd
) == 64)
3295 i_ehdrp
->e_machine
= EM_SPARCV9
;
3297 i_ehdrp
->e_machine
= EM_SPARC
;
3300 i_ehdrp
->e_machine
= EM_S370
;
3303 i_ehdrp
->e_machine
= EM_386
;
3306 i_ehdrp
->e_machine
= EM_IA_64
;
3308 case bfd_arch_m68hc11
:
3309 i_ehdrp
->e_machine
= EM_68HC11
;
3311 case bfd_arch_m68hc12
:
3312 i_ehdrp
->e_machine
= EM_68HC12
;
3315 i_ehdrp
->e_machine
= EM_68K
;
3318 i_ehdrp
->e_machine
= EM_88K
;
3321 i_ehdrp
->e_machine
= EM_860
;
3324 i_ehdrp
->e_machine
= EM_960
;
3326 case bfd_arch_mips
: /* MIPS Rxxxx */
3327 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
3330 i_ehdrp
->e_machine
= EM_PARISC
;
3332 case bfd_arch_powerpc
:
3333 i_ehdrp
->e_machine
= EM_PPC
;
3335 case bfd_arch_alpha
:
3336 i_ehdrp
->e_machine
= EM_ALPHA
;
3339 i_ehdrp
->e_machine
= EM_SH
;
3342 i_ehdrp
->e_machine
= EM_CYGNUS_D10V
;
3345 i_ehdrp
->e_machine
= EM_CYGNUS_D30V
;
3348 i_ehdrp
->e_machine
= EM_CYGNUS_FR30
;
3350 case bfd_arch_mcore
:
3351 i_ehdrp
->e_machine
= EM_MCORE
;
3354 i_ehdrp
->e_machine
= EM_AVR
;
3357 switch (bfd_get_mach (abfd
))
3360 case 0: i_ehdrp
->e_machine
= EM_CYGNUS_V850
; break;
3364 i_ehdrp
->e_machine
= EM_CYGNUS_ARC
;
3367 i_ehdrp
->e_machine
= EM_ARM
;
3370 i_ehdrp
->e_machine
= EM_CYGNUS_M32R
;
3372 case bfd_arch_mn10200
:
3373 i_ehdrp
->e_machine
= EM_CYGNUS_MN10200
;
3375 case bfd_arch_mn10300
:
3376 i_ehdrp
->e_machine
= EM_CYGNUS_MN10300
;
3379 i_ehdrp
->e_machine
= EM_PJ
;
3382 i_ehdrp
->e_machine
= EM_CRIS
;
3384 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
3386 i_ehdrp
->e_machine
= EM_NONE
;
3388 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3389 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3391 /* No program header, for now. */
3392 i_ehdrp
->e_phoff
= 0;
3393 i_ehdrp
->e_phentsize
= 0;
3394 i_ehdrp
->e_phnum
= 0;
3396 /* Each bfd section is section header entry. */
3397 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3398 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3400 /* If we're building an executable, we'll need a program header table. */
3401 if (abfd
->flags
& EXEC_P
)
3403 /* It all happens later. */
3405 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3407 /* elf_build_phdrs() returns a (NULL-terminated) array of
3408 Elf_Internal_Phdrs. */
3409 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3410 i_ehdrp
->e_phoff
= outbase
;
3411 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3416 i_ehdrp
->e_phentsize
= 0;
3418 i_ehdrp
->e_phoff
= 0;
3421 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3422 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3423 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3424 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3425 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3426 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3427 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3428 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3429 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3435 /* Assign file positions for all the reloc sections which are not part
3436 of the loadable file image. */
3439 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3444 Elf_Internal_Shdr
**shdrpp
;
3446 off
= elf_tdata (abfd
)->next_file_pos
;
3448 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3449 i
< elf_elfheader (abfd
)->e_shnum
;
3452 Elf_Internal_Shdr
*shdrp
;
3455 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3456 && shdrp
->sh_offset
== -1)
3457 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3460 elf_tdata (abfd
)->next_file_pos
= off
;
3464 _bfd_elf_write_object_contents (abfd
)
3467 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3468 Elf_Internal_Ehdr
*i_ehdrp
;
3469 Elf_Internal_Shdr
**i_shdrp
;
3473 if (! abfd
->output_has_begun
3474 && ! _bfd_elf_compute_section_file_positions
3475 (abfd
, (struct bfd_link_info
*) NULL
))
3478 i_shdrp
= elf_elfsections (abfd
);
3479 i_ehdrp
= elf_elfheader (abfd
);
3482 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3486 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3488 /* After writing the headers, we need to write the sections too... */
3489 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3491 if (bed
->elf_backend_section_processing
)
3492 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3493 if (i_shdrp
[count
]->contents
)
3495 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3496 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3498 != i_shdrp
[count
]->sh_size
))
3503 /* Write out the section header names. */
3504 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3505 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3508 if (bed
->elf_backend_final_write_processing
)
3509 (*bed
->elf_backend_final_write_processing
) (abfd
,
3510 elf_tdata (abfd
)->linker
);
3512 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3516 _bfd_elf_write_corefile_contents (abfd
)
3519 /* Hopefully this can be done just like an object file. */
3520 return _bfd_elf_write_object_contents (abfd
);
3523 /* Given a section, search the header to find them. */
3526 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3530 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3531 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3533 Elf_Internal_Shdr
*hdr
;
3534 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3536 for (index
= 0; index
< maxindex
; index
++)
3538 hdr
= i_shdrp
[index
];
3539 if (hdr
->bfd_section
== asect
)
3543 if (bed
->elf_backend_section_from_bfd_section
)
3545 for (index
= 0; index
< maxindex
; index
++)
3549 hdr
= i_shdrp
[index
];
3551 if ((*bed
->elf_backend_section_from_bfd_section
)
3552 (abfd
, hdr
, asect
, &retval
))
3557 if (bfd_is_abs_section (asect
))
3559 if (bfd_is_com_section (asect
))
3561 if (bfd_is_und_section (asect
))
3564 bfd_set_error (bfd_error_nonrepresentable_section
);
3569 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3573 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3575 asymbol
**asym_ptr_ptr
;
3577 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3579 flagword flags
= asym_ptr
->flags
;
3581 /* When gas creates relocations against local labels, it creates its
3582 own symbol for the section, but does put the symbol into the
3583 symbol chain, so udata is 0. When the linker is generating
3584 relocatable output, this section symbol may be for one of the
3585 input sections rather than the output section. */
3586 if (asym_ptr
->udata
.i
== 0
3587 && (flags
& BSF_SECTION_SYM
)
3588 && asym_ptr
->section
)
3592 if (asym_ptr
->section
->output_section
!= NULL
)
3593 indx
= asym_ptr
->section
->output_section
->index
;
3595 indx
= asym_ptr
->section
->index
;
3596 if (elf_section_syms (abfd
)[indx
])
3597 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3600 idx
= asym_ptr
->udata
.i
;
3604 /* This case can occur when using --strip-symbol on a symbol
3605 which is used in a relocation entry. */
3606 (*_bfd_error_handler
)
3607 (_("%s: symbol `%s' required but not present"),
3608 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3609 bfd_set_error (bfd_error_no_symbols
);
3616 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3617 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3618 elf_symbol_flags (flags
));
3626 /* Copy private BFD data. This copies any program header information. */
3629 copy_private_bfd_data (ibfd
, obfd
)
3633 Elf_Internal_Ehdr
* iehdr
;
3634 struct elf_segment_map
* map
;
3635 struct elf_segment_map
* map_first
;
3636 struct elf_segment_map
** pointer_to_map
;
3637 Elf_Internal_Phdr
* segment
;
3640 unsigned int num_segments
;
3641 boolean phdr_included
= false;
3642 bfd_vma maxpagesize
;
3643 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
3644 unsigned int phdr_adjust_num
= 0;
3646 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3647 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3650 if (elf_tdata (ibfd
)->phdr
== NULL
)
3653 iehdr
= elf_elfheader (ibfd
);
3656 pointer_to_map
= &map_first
;
3658 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3659 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3661 /* Returns the end address of the segment + 1. */
3662 #define SEGMENT_END(segment, start) \
3663 (start + (segment->p_memsz > segment->p_filesz \
3664 ? segment->p_memsz : segment->p_filesz))
3666 /* Returns true if the given section is contained within
3667 the given segment. VMA addresses are compared. */
3668 #define IS_CONTAINED_BY_VMA(section, segment) \
3669 (section->vma >= segment->p_vaddr \
3670 && (section->vma + section->_raw_size) \
3671 <= (SEGMENT_END (segment, segment->p_vaddr)))
3673 /* Returns true if the given section is contained within
3674 the given segment. LMA addresses are compared. */
3675 #define IS_CONTAINED_BY_LMA(section, segment, base) \
3676 (section->lma >= base \
3677 && (section->lma + section->_raw_size) \
3678 <= SEGMENT_END (segment, base))
3680 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3681 #define IS_COREFILE_NOTE(p, s) \
3682 (p->p_type == PT_NOTE \
3683 && bfd_get_format (ibfd) == bfd_core \
3684 && s->vma == 0 && s->lma == 0 \
3685 && (bfd_vma) s->filepos >= p->p_offset \
3686 && (bfd_vma) s->filepos + s->_raw_size \
3687 <= p->p_offset + p->p_filesz)
3689 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3690 linker, which generates a PT_INTERP section with p_vaddr and
3691 p_memsz set to 0. */
3692 #define IS_SOLARIS_PT_INTERP(p, s) \
3694 && p->p_filesz > 0 \
3695 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3696 && s->_raw_size > 0 \
3697 && (bfd_vma) s->filepos >= p->p_offset \
3698 && ((bfd_vma) s->filepos + s->_raw_size \
3699 <= p->p_offset + p->p_filesz))
3701 /* Decide if the given section should be included in the given segment.
3702 A section will be included if:
3703 1. It is within the address space of the segment,
3704 2. It is an allocated segment,
3705 3. There is an output section associated with it,
3706 4. The section has not already been allocated to a previous segment. */
3707 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
3708 ((((IS_CONTAINED_BY_VMA (section, segment) \
3709 || IS_SOLARIS_PT_INTERP (segment, section)) \
3710 && (section->flags & SEC_ALLOC) != 0) \
3711 || IS_COREFILE_NOTE (segment, section)) \
3712 && section->output_section != NULL \
3713 && section->segment_mark == false)
3715 /* Returns true iff seg1 starts after the end of seg2. */
3716 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
3717 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
3719 /* Returns true iff seg1 and seg2 overlap. */
3720 #define SEGMENT_OVERLAPS(seg1, seg2) \
3721 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
3723 /* Initialise the segment mark field. */
3724 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3725 section
->segment_mark
= false;
3727 /* Scan through the segments specified in the program header
3728 of the input BFD. For this first scan we look for overlaps
3729 in the loadable segments. These can be created by wierd
3730 parameters to objcopy. */
3731 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3736 Elf_Internal_Phdr
*segment2
;
3738 if (segment
->p_type
!= PT_LOAD
)
3741 /* Determine if this segment overlaps any previous segments. */
3742 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
3744 bfd_signed_vma extra_length
;
3746 if (segment2
->p_type
!= PT_LOAD
3747 || ! SEGMENT_OVERLAPS (segment
, segment2
))
3750 /* Merge the two segments together. */
3751 if (segment2
->p_vaddr
< segment
->p_vaddr
)
3753 /* Extend SEGMENT2 to include SEGMENT and then delete
3756 SEGMENT_END (segment
, segment
->p_vaddr
)
3757 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
3759 if (extra_length
> 0)
3761 segment2
->p_memsz
+= extra_length
;
3762 segment2
->p_filesz
+= extra_length
;
3765 segment
->p_type
= PT_NULL
;
3767 /* Since we have deleted P we must restart the outer loop. */
3769 segment
= elf_tdata (ibfd
)->phdr
;
3774 /* Extend SEGMENT to include SEGMENT2 and then delete
3777 SEGMENT_END (segment2
, segment2
->p_vaddr
)
3778 - SEGMENT_END (segment
, segment
->p_vaddr
);
3780 if (extra_length
> 0)
3782 segment
->p_memsz
+= extra_length
;
3783 segment
->p_filesz
+= extra_length
;
3786 segment2
->p_type
= PT_NULL
;
3791 /* The second scan attempts to assign sections to segments. */
3792 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3796 unsigned int section_count
;
3797 asection
** sections
;
3798 asection
* output_section
;
3800 bfd_vma matching_lma
;
3801 bfd_vma suggested_lma
;
3804 if (segment
->p_type
== PT_NULL
)
3807 /* Compute how many sections might be placed into this segment. */
3809 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3810 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3813 /* Allocate a segment map big enough to contain all of the
3814 sections we have selected. */
3815 map
= ((struct elf_segment_map
*)
3817 (sizeof (struct elf_segment_map
)
3818 + ((size_t) section_count
- 1) * sizeof (asection
*))));
3822 /* Initialise the fields of the segment map. Default to
3823 using the physical address of the segment in the input BFD. */
3825 map
->p_type
= segment
->p_type
;
3826 map
->p_flags
= segment
->p_flags
;
3827 map
->p_flags_valid
= 1;
3828 map
->p_paddr
= segment
->p_paddr
;
3829 map
->p_paddr_valid
= 1;
3831 /* Determine if this segment contains the ELF file header
3832 and if it contains the program headers themselves. */
3833 map
->includes_filehdr
= (segment
->p_offset
== 0
3834 && segment
->p_filesz
>= iehdr
->e_ehsize
);
3836 map
->includes_phdrs
= 0;
3838 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
3840 map
->includes_phdrs
=
3841 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3842 && (segment
->p_offset
+ segment
->p_filesz
3843 >= ((bfd_vma
) iehdr
->e_phoff
3844 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3846 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
3847 phdr_included
= true;
3850 if (section_count
== 0)
3852 /* Special segments, such as the PT_PHDR segment, may contain
3853 no sections, but ordinary, loadable segments should contain
3855 if (segment
->p_type
== PT_LOAD
)
3857 (_("%s: warning: Empty loadable segment detected\n"),
3858 bfd_get_filename (ibfd
));
3861 *pointer_to_map
= map
;
3862 pointer_to_map
= &map
->next
;
3867 /* Now scan the sections in the input BFD again and attempt
3868 to add their corresponding output sections to the segment map.
3869 The problem here is how to handle an output section which has
3870 been moved (ie had its LMA changed). There are four possibilities:
3872 1. None of the sections have been moved.
3873 In this case we can continue to use the segment LMA from the
3876 2. All of the sections have been moved by the same amount.
3877 In this case we can change the segment's LMA to match the LMA
3878 of the first section.
3880 3. Some of the sections have been moved, others have not.
3881 In this case those sections which have not been moved can be
3882 placed in the current segment which will have to have its size,
3883 and possibly its LMA changed, and a new segment or segments will
3884 have to be created to contain the other sections.
3886 4. The sections have been moved, but not be the same amount.
3887 In this case we can change the segment's LMA to match the LMA
3888 of the first section and we will have to create a new segment
3889 or segments to contain the other sections.
3891 In order to save time, we allocate an array to hold the section
3892 pointers that we are interested in. As these sections get assigned
3893 to a segment, they are removed from this array. */
3895 sections
= (asection
**) bfd_malloc
3896 (sizeof (asection
*) * section_count
);
3897 if (sections
== NULL
)
3900 /* Step One: Scan for segment vs section LMA conflicts.
3901 Also add the sections to the section array allocated above.
3902 Also add the sections to the current segment. In the common
3903 case, where the sections have not been moved, this means that
3904 we have completely filled the segment, and there is nothing
3910 for (j
= 0, section
= ibfd
->sections
;
3912 section
= section
->next
)
3914 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3916 output_section
= section
->output_section
;
3918 sections
[j
++] = section
;
3920 /* The Solaris native linker always sets p_paddr to 0.
3921 We try to catch that case here, and set it to the
3923 if (segment
->p_paddr
== 0
3924 && segment
->p_vaddr
!= 0
3926 && output_section
->lma
!= 0
3927 && (output_section
->vma
== (segment
->p_vaddr
3928 + (map
->includes_filehdr
3931 + (map
->includes_phdrs
3932 ? iehdr
->e_phnum
* iehdr
->e_phentsize
3934 map
->p_paddr
= segment
->p_vaddr
;
3936 /* Match up the physical address of the segment with the
3937 LMA address of the output section. */
3938 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
3939 || IS_COREFILE_NOTE (segment
, section
))
3941 if (matching_lma
== 0)
3942 matching_lma
= output_section
->lma
;
3944 /* We assume that if the section fits within the segment
3945 then it does not overlap any other section within that
3947 map
->sections
[isec
++] = output_section
;
3949 else if (suggested_lma
== 0)
3950 suggested_lma
= output_section
->lma
;
3954 BFD_ASSERT (j
== section_count
);
3956 /* Step Two: Adjust the physical address of the current segment,
3958 if (isec
== section_count
)
3960 /* All of the sections fitted within the segment as currently
3961 specified. This is the default case. Add the segment to
3962 the list of built segments and carry on to process the next
3963 program header in the input BFD. */
3964 map
->count
= section_count
;
3965 *pointer_to_map
= map
;
3966 pointer_to_map
= &map
->next
;
3973 if (matching_lma
!= 0)
3975 /* At least one section fits inside the current segment.
3976 Keep it, but modify its physical address to match the
3977 LMA of the first section that fitted. */
3978 map
->p_paddr
= matching_lma
;
3982 /* None of the sections fitted inside the current segment.
3983 Change the current segment's physical address to match
3984 the LMA of the first section. */
3985 map
->p_paddr
= suggested_lma
;
3988 /* Offset the segment physical address from the lma
3989 to allow for space taken up by elf headers. */
3990 if (map
->includes_filehdr
)
3991 map
->p_paddr
-= iehdr
->e_ehsize
;
3993 if (map
->includes_phdrs
)
3995 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
3997 /* iehdr->e_phnum is just an estimate of the number
3998 of program headers that we will need. Make a note
3999 here of the number we used and the segment we chose
4000 to hold these headers, so that we can adjust the
4001 offset when we know the correct value. */
4002 phdr_adjust_num
= iehdr
->e_phnum
;
4003 phdr_adjust_seg
= map
;
4007 /* Step Three: Loop over the sections again, this time assigning
4008 those that fit to the current segment and remvoing them from the
4009 sections array; but making sure not to leave large gaps. Once all
4010 possible sections have been assigned to the current segment it is
4011 added to the list of built segments and if sections still remain
4012 to be assigned, a new segment is constructed before repeating
4020 /* Fill the current segment with sections that fit. */
4021 for (j
= 0; j
< section_count
; j
++)
4023 section
= sections
[j
];
4025 if (section
== NULL
)
4028 output_section
= section
->output_section
;
4030 BFD_ASSERT (output_section
!= NULL
);
4032 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4033 || IS_COREFILE_NOTE (segment
, section
))
4035 if (map
->count
== 0)
4037 /* If the first section in a segment does not start at
4038 the beginning of the segment, then something is
4040 if (output_section
->lma
!=
4042 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4043 + (map
->includes_phdrs
4044 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4050 asection
* prev_sec
;
4052 prev_sec
= map
->sections
[map
->count
- 1];
4054 /* If the gap between the end of the previous section
4055 and the start of this section is more than
4056 maxpagesize then we need to start a new segment. */
4057 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
4058 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4059 || ((prev_sec
->lma
+ prev_sec
->_raw_size
) > output_section
->lma
))
4061 if (suggested_lma
== 0)
4062 suggested_lma
= output_section
->lma
;
4068 map
->sections
[map
->count
++] = output_section
;
4071 section
->segment_mark
= true;
4073 else if (suggested_lma
== 0)
4074 suggested_lma
= output_section
->lma
;
4077 BFD_ASSERT (map
->count
> 0);
4079 /* Add the current segment to the list of built segments. */
4080 *pointer_to_map
= map
;
4081 pointer_to_map
= &map
->next
;
4083 if (isec
< section_count
)
4085 /* We still have not allocated all of the sections to
4086 segments. Create a new segment here, initialise it
4087 and carry on looping. */
4088 map
= ((struct elf_segment_map
*)
4090 (sizeof (struct elf_segment_map
)
4091 + ((size_t) section_count
- 1)
4092 * sizeof (asection
*))));
4096 /* Initialise the fields of the segment map. Set the physical
4097 physical address to the LMA of the first section that has
4098 not yet been assigned. */
4100 map
->p_type
= segment
->p_type
;
4101 map
->p_flags
= segment
->p_flags
;
4102 map
->p_flags_valid
= 1;
4103 map
->p_paddr
= suggested_lma
;
4104 map
->p_paddr_valid
= 1;
4105 map
->includes_filehdr
= 0;
4106 map
->includes_phdrs
= 0;
4109 while (isec
< section_count
);
4114 /* The Solaris linker creates program headers in which all the
4115 p_paddr fields are zero. When we try to objcopy or strip such a
4116 file, we get confused. Check for this case, and if we find it
4117 reset the p_paddr_valid fields. */
4118 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4119 if (map
->p_paddr
!= 0)
4123 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4124 map
->p_paddr_valid
= 0;
4127 elf_tdata (obfd
)->segment_map
= map_first
;
4129 /* If we had to estimate the number of program headers that were
4130 going to be needed, then check our estimate know and adjust
4131 the offset if necessary. */
4132 if (phdr_adjust_seg
!= NULL
)
4136 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4139 if (count
> phdr_adjust_num
)
4140 phdr_adjust_seg
->p_paddr
4141 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4145 /* Final Step: Sort the segments into ascending order of physical
4147 if (map_first
!= NULL
)
4149 struct elf_segment_map
*prev
;
4152 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4154 /* Yes I know - its a bubble sort.... */
4155 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4157 /* Swap map and map->next. */
4158 prev
->next
= map
->next
;
4159 map
->next
= map
->next
->next
;
4160 prev
->next
->next
= map
;
4170 #undef IS_CONTAINED_BY_VMA
4171 #undef IS_CONTAINED_BY_LMA
4172 #undef IS_COREFILE_NOTE
4173 #undef IS_SOLARIS_PT_INTERP
4174 #undef INCLUDE_SECTION_IN_SEGMENT
4175 #undef SEGMENT_AFTER_SEGMENT
4176 #undef SEGMENT_OVERLAPS
4180 /* Copy private section information. This copies over the entsize
4181 field, and sometimes the info field. */
4184 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4190 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4192 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4193 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4196 /* Copy over private BFD data if it has not already been copied.
4197 This must be done here, rather than in the copy_private_bfd_data
4198 entry point, because the latter is called after the section
4199 contents have been set, which means that the program headers have
4200 already been worked out. */
4201 if (elf_tdata (obfd
)->segment_map
== NULL
4202 && elf_tdata (ibfd
)->phdr
!= NULL
)
4206 /* Only set up the segments if there are no more SEC_ALLOC
4207 sections. FIXME: This won't do the right thing if objcopy is
4208 used to remove the last SEC_ALLOC section, since objcopy
4209 won't call this routine in that case. */
4210 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4211 if ((s
->flags
& SEC_ALLOC
) != 0)
4215 if (! copy_private_bfd_data (ibfd
, obfd
))
4220 ihdr
= &elf_section_data (isec
)->this_hdr
;
4221 ohdr
= &elf_section_data (osec
)->this_hdr
;
4223 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4225 if (ihdr
->sh_type
== SHT_SYMTAB
4226 || ihdr
->sh_type
== SHT_DYNSYM
4227 || ihdr
->sh_type
== SHT_GNU_verneed
4228 || ihdr
->sh_type
== SHT_GNU_verdef
)
4229 ohdr
->sh_info
= ihdr
->sh_info
;
4231 elf_section_data (osec
)->use_rela_p
4232 = elf_section_data (isec
)->use_rela_p
;
4237 /* Copy private symbol information. If this symbol is in a section
4238 which we did not map into a BFD section, try to map the section
4239 index correctly. We use special macro definitions for the mapped
4240 section indices; these definitions are interpreted by the
4241 swap_out_syms function. */
4243 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4244 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4245 #define MAP_STRTAB (SHN_LORESERVE - 3)
4246 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4249 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4255 elf_symbol_type
*isym
, *osym
;
4257 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4258 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4261 isym
= elf_symbol_from (ibfd
, isymarg
);
4262 osym
= elf_symbol_from (obfd
, osymarg
);
4266 && bfd_is_abs_section (isym
->symbol
.section
))
4270 shndx
= isym
->internal_elf_sym
.st_shndx
;
4271 if (shndx
== elf_onesymtab (ibfd
))
4272 shndx
= MAP_ONESYMTAB
;
4273 else if (shndx
== elf_dynsymtab (ibfd
))
4274 shndx
= MAP_DYNSYMTAB
;
4275 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4277 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4278 shndx
= MAP_SHSTRTAB
;
4279 osym
->internal_elf_sym
.st_shndx
= shndx
;
4285 /* Swap out the symbols. */
4288 swap_out_syms (abfd
, sttp
, relocatable_p
)
4290 struct bfd_strtab_hash
**sttp
;
4293 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4295 if (!elf_map_symbols (abfd
))
4298 /* Dump out the symtabs. */
4300 int symcount
= bfd_get_symcount (abfd
);
4301 asymbol
**syms
= bfd_get_outsymbols (abfd
);
4302 struct bfd_strtab_hash
*stt
;
4303 Elf_Internal_Shdr
*symtab_hdr
;
4304 Elf_Internal_Shdr
*symstrtab_hdr
;
4305 char *outbound_syms
;
4308 stt
= _bfd_elf_stringtab_init ();
4312 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4313 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4314 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4315 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4316 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4317 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4319 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4320 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4322 outbound_syms
= bfd_alloc (abfd
,
4323 (1 + symcount
) * bed
->s
->sizeof_sym
);
4324 if (outbound_syms
== NULL
)
4326 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4328 /* now generate the data (for "contents") */
4330 /* Fill in zeroth symbol and swap it out. */
4331 Elf_Internal_Sym sym
;
4337 sym
.st_shndx
= SHN_UNDEF
;
4338 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4339 outbound_syms
+= bed
->s
->sizeof_sym
;
4341 for (idx
= 0; idx
< symcount
; idx
++)
4343 Elf_Internal_Sym sym
;
4344 bfd_vma value
= syms
[idx
]->value
;
4345 elf_symbol_type
*type_ptr
;
4346 flagword flags
= syms
[idx
]->flags
;
4349 if (flags
& BSF_SECTION_SYM
)
4350 /* Section symbols have no names. */
4354 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4357 if (sym
.st_name
== (unsigned long) -1)
4361 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4363 if ((flags
& BSF_SECTION_SYM
) == 0
4364 && bfd_is_com_section (syms
[idx
]->section
))
4366 /* ELF common symbols put the alignment into the `value' field,
4367 and the size into the `size' field. This is backwards from
4368 how BFD handles it, so reverse it here. */
4369 sym
.st_size
= value
;
4370 if (type_ptr
== NULL
4371 || type_ptr
->internal_elf_sym
.st_value
== 0)
4372 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4374 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4375 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4376 (abfd
, syms
[idx
]->section
);
4380 asection
*sec
= syms
[idx
]->section
;
4383 if (sec
->output_section
)
4385 value
+= sec
->output_offset
;
4386 sec
= sec
->output_section
;
4388 /* Don't add in the section vma for relocatable output. */
4389 if (! relocatable_p
)
4391 sym
.st_value
= value
;
4392 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4394 if (bfd_is_abs_section (sec
)
4396 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4398 /* This symbol is in a real ELF section which we did
4399 not create as a BFD section. Undo the mapping done
4400 by copy_private_symbol_data. */
4401 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4405 shndx
= elf_onesymtab (abfd
);
4408 shndx
= elf_dynsymtab (abfd
);
4411 shndx
= elf_tdata (abfd
)->strtab_section
;
4414 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4422 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4428 /* Writing this would be a hell of a lot easier if
4429 we had some decent documentation on bfd, and
4430 knew what to expect of the library, and what to
4431 demand of applications. For example, it
4432 appears that `objcopy' might not set the
4433 section of a symbol to be a section that is
4434 actually in the output file. */
4435 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4436 BFD_ASSERT (sec2
!= 0);
4437 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4438 BFD_ASSERT (shndx
!= -1);
4442 sym
.st_shndx
= shndx
;
4445 if ((flags
& BSF_FUNCTION
) != 0)
4447 else if ((flags
& BSF_OBJECT
) != 0)
4452 /* Processor-specific types */
4453 if (type_ptr
!= NULL
4454 && bed
->elf_backend_get_symbol_type
)
4455 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4457 if (flags
& BSF_SECTION_SYM
)
4458 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4459 else if (bfd_is_com_section (syms
[idx
]->section
))
4460 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4461 else if (bfd_is_und_section (syms
[idx
]->section
))
4462 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4466 else if (flags
& BSF_FILE
)
4467 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4470 int bind
= STB_LOCAL
;
4472 if (flags
& BSF_LOCAL
)
4474 else if (flags
& BSF_WEAK
)
4476 else if (flags
& BSF_GLOBAL
)
4479 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4482 if (type_ptr
!= NULL
)
4483 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4487 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4488 outbound_syms
+= bed
->s
->sizeof_sym
;
4492 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4493 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4495 symstrtab_hdr
->sh_flags
= 0;
4496 symstrtab_hdr
->sh_addr
= 0;
4497 symstrtab_hdr
->sh_entsize
= 0;
4498 symstrtab_hdr
->sh_link
= 0;
4499 symstrtab_hdr
->sh_info
= 0;
4500 symstrtab_hdr
->sh_addralign
= 1;
4506 /* Return the number of bytes required to hold the symtab vector.
4508 Note that we base it on the count plus 1, since we will null terminate
4509 the vector allocated based on this size. However, the ELF symbol table
4510 always has a dummy entry as symbol #0, so it ends up even. */
4513 _bfd_elf_get_symtab_upper_bound (abfd
)
4518 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4520 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4521 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4527 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4532 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4534 if (elf_dynsymtab (abfd
) == 0)
4536 bfd_set_error (bfd_error_invalid_operation
);
4540 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4541 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4547 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4548 bfd
*abfd ATTRIBUTE_UNUSED
;
4551 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4554 /* Canonicalize the relocs. */
4557 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4566 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4572 tblptr
= section
->relocation
;
4573 for (i
= 0; i
< section
->reloc_count
; i
++)
4574 *relptr
++ = tblptr
++;
4578 return section
->reloc_count
;
4582 _bfd_elf_get_symtab (abfd
, alocation
)
4584 asymbol
**alocation
;
4586 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4587 (abfd
, alocation
, false);
4590 bfd_get_symcount (abfd
) = symcount
;
4595 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4597 asymbol
**alocation
;
4599 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4600 (abfd
, alocation
, true);
4603 /* Return the size required for the dynamic reloc entries. Any
4604 section that was actually installed in the BFD, and has type
4605 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4606 considered to be a dynamic reloc section. */
4609 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4615 if (elf_dynsymtab (abfd
) == 0)
4617 bfd_set_error (bfd_error_invalid_operation
);
4621 ret
= sizeof (arelent
*);
4622 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4623 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4624 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4625 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4626 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4627 * sizeof (arelent
*));
4632 /* Canonicalize the dynamic relocation entries. Note that we return
4633 the dynamic relocations as a single block, although they are
4634 actually associated with particular sections; the interface, which
4635 was designed for SunOS style shared libraries, expects that there
4636 is only one set of dynamic relocs. Any section that was actually
4637 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4638 the dynamic symbol table, is considered to be a dynamic reloc
4642 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4647 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4651 if (elf_dynsymtab (abfd
) == 0)
4653 bfd_set_error (bfd_error_invalid_operation
);
4657 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4659 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4661 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4662 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4663 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4668 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4670 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4672 for (i
= 0; i
< count
; i
++)
4683 /* Read in the version information. */
4686 _bfd_elf_slurp_version_tables (abfd
)
4689 bfd_byte
*contents
= NULL
;
4691 if (elf_dynverdef (abfd
) != 0)
4693 Elf_Internal_Shdr
*hdr
;
4694 Elf_External_Verdef
*everdef
;
4695 Elf_Internal_Verdef
*iverdef
;
4696 Elf_Internal_Verdef
*iverdefarr
;
4697 Elf_Internal_Verdef iverdefmem
;
4699 unsigned int maxidx
;
4701 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4703 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4704 if (contents
== NULL
)
4706 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4707 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4710 /* We know the number of entries in the section but not the maximum
4711 index. Therefore we have to run through all entries and find
4713 everdef
= (Elf_External_Verdef
*) contents
;
4715 for (i
= 0; i
< hdr
->sh_info
; ++i
)
4717 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4719 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) > maxidx
)
4720 maxidx
= iverdefmem
.vd_ndx
& VERSYM_VERSION
;
4722 everdef
= ((Elf_External_Verdef
*)
4723 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
4726 elf_tdata (abfd
)->verdef
=
4727 ((Elf_Internal_Verdef
*)
4728 bfd_zalloc (abfd
, maxidx
* sizeof (Elf_Internal_Verdef
)));
4729 if (elf_tdata (abfd
)->verdef
== NULL
)
4732 elf_tdata (abfd
)->cverdefs
= maxidx
;
4734 everdef
= (Elf_External_Verdef
*) contents
;
4735 iverdefarr
= elf_tdata (abfd
)->verdef
;
4736 for (i
= 0; i
< hdr
->sh_info
; i
++)
4738 Elf_External_Verdaux
*everdaux
;
4739 Elf_Internal_Verdaux
*iverdaux
;
4742 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4744 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
4745 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
4747 iverdef
->vd_bfd
= abfd
;
4749 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4752 * sizeof (Elf_Internal_Verdaux
))));
4753 if (iverdef
->vd_auxptr
== NULL
)
4756 everdaux
= ((Elf_External_Verdaux
*)
4757 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4758 iverdaux
= iverdef
->vd_auxptr
;
4759 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4761 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4763 iverdaux
->vda_nodename
=
4764 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4765 iverdaux
->vda_name
);
4766 if (iverdaux
->vda_nodename
== NULL
)
4769 if (j
+ 1 < iverdef
->vd_cnt
)
4770 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4772 iverdaux
->vda_nextptr
= NULL
;
4774 everdaux
= ((Elf_External_Verdaux
*)
4775 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4778 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4780 if (i
+ 1 < hdr
->sh_info
)
4781 iverdef
->vd_nextdef
= iverdef
+ 1;
4783 iverdef
->vd_nextdef
= NULL
;
4785 everdef
= ((Elf_External_Verdef
*)
4786 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4793 if (elf_dynverref (abfd
) != 0)
4795 Elf_Internal_Shdr
*hdr
;
4796 Elf_External_Verneed
*everneed
;
4797 Elf_Internal_Verneed
*iverneed
;
4800 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4802 elf_tdata (abfd
)->verref
=
4803 ((Elf_Internal_Verneed
*)
4804 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4805 if (elf_tdata (abfd
)->verref
== NULL
)
4808 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4810 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4811 if (contents
== NULL
)
4813 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4814 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4817 everneed
= (Elf_External_Verneed
*) contents
;
4818 iverneed
= elf_tdata (abfd
)->verref
;
4819 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4821 Elf_External_Vernaux
*evernaux
;
4822 Elf_Internal_Vernaux
*ivernaux
;
4825 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4827 iverneed
->vn_bfd
= abfd
;
4829 iverneed
->vn_filename
=
4830 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4832 if (iverneed
->vn_filename
== NULL
)
4835 iverneed
->vn_auxptr
=
4836 ((Elf_Internal_Vernaux
*)
4838 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4840 evernaux
= ((Elf_External_Vernaux
*)
4841 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4842 ivernaux
= iverneed
->vn_auxptr
;
4843 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4845 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4847 ivernaux
->vna_nodename
=
4848 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4849 ivernaux
->vna_name
);
4850 if (ivernaux
->vna_nodename
== NULL
)
4853 if (j
+ 1 < iverneed
->vn_cnt
)
4854 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4856 ivernaux
->vna_nextptr
= NULL
;
4858 evernaux
= ((Elf_External_Vernaux
*)
4859 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4862 if (i
+ 1 < hdr
->sh_info
)
4863 iverneed
->vn_nextref
= iverneed
+ 1;
4865 iverneed
->vn_nextref
= NULL
;
4867 everneed
= ((Elf_External_Verneed
*)
4868 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4878 if (contents
== NULL
)
4884 _bfd_elf_make_empty_symbol (abfd
)
4887 elf_symbol_type
*newsym
;
4889 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4894 newsym
->symbol
.the_bfd
= abfd
;
4895 return &newsym
->symbol
;
4900 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4901 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4905 bfd_symbol_info (symbol
, ret
);
4908 /* Return whether a symbol name implies a local symbol. Most targets
4909 use this function for the is_local_label_name entry point, but some
4913 _bfd_elf_is_local_label_name (abfd
, name
)
4914 bfd
*abfd ATTRIBUTE_UNUSED
;
4917 /* Normal local symbols start with ``.L''. */
4918 if (name
[0] == '.' && name
[1] == 'L')
4921 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
4922 DWARF debugging symbols starting with ``..''. */
4923 if (name
[0] == '.' && name
[1] == '.')
4926 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
4927 emitting DWARF debugging output. I suspect this is actually a
4928 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
4929 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
4930 underscore to be emitted on some ELF targets). For ease of use,
4931 we treat such symbols as local. */
4932 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
4939 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
4940 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4941 asymbol
*symbol ATTRIBUTE_UNUSED
;
4948 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
4950 enum bfd_architecture arch
;
4951 unsigned long machine
;
4953 /* If this isn't the right architecture for this backend, and this
4954 isn't the generic backend, fail. */
4955 if (arch
!= get_elf_backend_data (abfd
)->arch
4956 && arch
!= bfd_arch_unknown
4957 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
4960 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
4963 /* Find the nearest line to a particular section and offset, for error
4967 _bfd_elf_find_nearest_line (abfd
,
4978 CONST
char **filename_ptr
;
4979 CONST
char **functionname_ptr
;
4980 unsigned int *line_ptr
;
4983 const char *filename
;
4988 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
4989 filename_ptr
, functionname_ptr
,
4993 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
4994 filename_ptr
, functionname_ptr
,
4998 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
4999 &found
, filename_ptr
,
5000 functionname_ptr
, line_ptr
,
5001 &elf_tdata (abfd
)->line_info
))
5006 if (symbols
== NULL
)
5013 for (p
= symbols
; *p
!= NULL
; p
++)
5017 q
= (elf_symbol_type
*) *p
;
5019 if (bfd_get_section (&q
->symbol
) != section
)
5022 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5027 filename
= bfd_asymbol_name (&q
->symbol
);
5031 if (q
->symbol
.section
== section
5032 && q
->symbol
.value
>= low_func
5033 && q
->symbol
.value
<= offset
)
5035 func
= (asymbol
*) q
;
5036 low_func
= q
->symbol
.value
;
5045 *filename_ptr
= filename
;
5046 *functionname_ptr
= bfd_asymbol_name (func
);
5052 _bfd_elf_sizeof_headers (abfd
, reloc
)
5058 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5060 ret
+= get_program_header_size (abfd
);
5065 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5070 bfd_size_type count
;
5072 Elf_Internal_Shdr
*hdr
;
5074 if (! abfd
->output_has_begun
5075 && ! _bfd_elf_compute_section_file_positions
5076 (abfd
, (struct bfd_link_info
*) NULL
))
5079 hdr
= &elf_section_data (section
)->this_hdr
;
5081 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
5083 if (bfd_write (location
, 1, count
, abfd
) != count
)
5090 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5091 bfd
*abfd ATTRIBUTE_UNUSED
;
5092 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5093 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5100 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5103 Elf_Internal_Rel
*dst
;
5109 /* Try to convert a non-ELF reloc into an ELF one. */
5112 _bfd_elf_validate_reloc (abfd
, areloc
)
5116 /* Check whether we really have an ELF howto. */
5118 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5120 bfd_reloc_code_real_type code
;
5121 reloc_howto_type
*howto
;
5123 /* Alien reloc: Try to determine its type to replace it with an
5124 equivalent ELF reloc. */
5126 if (areloc
->howto
->pc_relative
)
5128 switch (areloc
->howto
->bitsize
)
5131 code
= BFD_RELOC_8_PCREL
;
5134 code
= BFD_RELOC_12_PCREL
;
5137 code
= BFD_RELOC_16_PCREL
;
5140 code
= BFD_RELOC_24_PCREL
;
5143 code
= BFD_RELOC_32_PCREL
;
5146 code
= BFD_RELOC_64_PCREL
;
5152 howto
= bfd_reloc_type_lookup (abfd
, code
);
5154 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5156 if (howto
->pcrel_offset
)
5157 areloc
->addend
+= areloc
->address
;
5159 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5164 switch (areloc
->howto
->bitsize
)
5170 code
= BFD_RELOC_14
;
5173 code
= BFD_RELOC_16
;
5176 code
= BFD_RELOC_26
;
5179 code
= BFD_RELOC_32
;
5182 code
= BFD_RELOC_64
;
5188 howto
= bfd_reloc_type_lookup (abfd
, code
);
5192 areloc
->howto
= howto
;
5200 (*_bfd_error_handler
)
5201 (_("%s: unsupported relocation type %s"),
5202 bfd_get_filename (abfd
), areloc
->howto
->name
);
5203 bfd_set_error (bfd_error_bad_value
);
5208 _bfd_elf_close_and_cleanup (abfd
)
5211 if (bfd_get_format (abfd
) == bfd_object
)
5213 if (elf_shstrtab (abfd
) != NULL
)
5214 _bfd_stringtab_free (elf_shstrtab (abfd
));
5217 return _bfd_generic_close_and_cleanup (abfd
);
5220 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5221 in the relocation's offset. Thus we cannot allow any sort of sanity
5222 range-checking to interfere. There is nothing else to do in processing
5225 bfd_reloc_status_type
5226 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5227 bfd
*abfd ATTRIBUTE_UNUSED
;
5228 arelent
*re ATTRIBUTE_UNUSED
;
5229 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5230 PTR data ATTRIBUTE_UNUSED
;
5231 asection
*is ATTRIBUTE_UNUSED
;
5232 bfd
*obfd ATTRIBUTE_UNUSED
;
5233 char **errmsg ATTRIBUTE_UNUSED
;
5235 return bfd_reloc_ok
;
5238 /* Elf core file support. Much of this only works on native
5239 toolchains, since we rely on knowing the
5240 machine-dependent procfs structure in order to pick
5241 out details about the corefile. */
5243 #ifdef HAVE_SYS_PROCFS_H
5244 # include <sys/procfs.h>
5247 /* Define offsetof for those systems which lack it. */
5250 # define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
5253 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5256 elfcore_make_pid (abfd
)
5259 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5260 + (elf_tdata (abfd
)->core_pid
));
5263 /* If there isn't a section called NAME, make one, using
5264 data from SECT. Note, this function will generate a
5265 reference to NAME, so you shouldn't deallocate or
5269 elfcore_maybe_make_sect (abfd
, name
, sect
)
5276 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5279 sect2
= bfd_make_section (abfd
, name
);
5283 sect2
->_raw_size
= sect
->_raw_size
;
5284 sect2
->filepos
= sect
->filepos
;
5285 sect2
->flags
= sect
->flags
;
5286 sect2
->alignment_power
= sect
->alignment_power
;
5290 /* prstatus_t exists on:
5292 linux 2.[01] + glibc
5296 #if defined (HAVE_PRSTATUS_T)
5298 elfcore_grok_prstatus (abfd
, note
)
5300 Elf_Internal_Note
*note
;
5308 if (note
->descsz
== sizeof (prstatus_t
))
5312 raw_size
= sizeof (prstat
.pr_reg
);
5313 offset
= offsetof (prstatus_t
, pr_reg
);
5314 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5316 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5317 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5319 /* pr_who exists on:
5322 pr_who doesn't exist on:
5325 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5326 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5329 #if defined (HAVE_PRSTATUS32_T)
5330 else if (note
->descsz
== sizeof (prstatus32_t
))
5332 /* 64-bit host, 32-bit corefile */
5333 prstatus32_t prstat
;
5335 raw_size
= sizeof (prstat
.pr_reg
);
5336 offset
= offsetof (prstatus32_t
, pr_reg
);
5337 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5339 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5340 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5342 /* pr_who exists on:
5345 pr_who doesn't exist on:
5348 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5349 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5352 #endif /* HAVE_PRSTATUS32_T */
5355 /* Fail - we don't know how to handle any other
5356 note size (ie. data object type). */
5360 /* Make a ".reg/999" section. */
5362 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5363 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5368 sect
= bfd_make_section (abfd
, name
);
5372 sect
->_raw_size
= raw_size
;
5373 sect
->filepos
= note
->descpos
+ offset
;
5375 sect
->flags
= SEC_HAS_CONTENTS
;
5376 sect
->alignment_power
= 2;
5378 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5383 #endif /* defined (HAVE_PRSTATUS_T) */
5385 /* Create a pseudosection containing the exact contents of NOTE. This
5386 actually creates up to two pseudosections:
5387 - For the single-threaded case, a section named NAME, unless
5388 such a section already exists.
5389 - For the multi-threaded case, a section named "NAME/PID", where
5390 PID is elfcore_make_pid (abfd).
5391 Both pseudosections have identical contents: the contents of NOTE. */
5394 elfcore_make_note_pseudosection (abfd
, name
, note
)
5397 Elf_Internal_Note
*note
;
5400 char *threaded_name
;
5403 /* Build the section name. */
5405 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5406 threaded_name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5407 if (threaded_name
== NULL
)
5409 strcpy (threaded_name
, buf
);
5411 sect
= bfd_make_section (abfd
, threaded_name
);
5414 sect
->_raw_size
= note
->descsz
;
5415 sect
->filepos
= note
->descpos
;
5416 sect
->flags
= SEC_HAS_CONTENTS
;
5417 sect
->alignment_power
= 2;
5419 if (! elfcore_maybe_make_sect (abfd
, name
, sect
))
5425 /* There isn't a consistent prfpregset_t across platforms,
5426 but it doesn't matter, because we don't have to pick this
5427 data structure apart. */
5430 elfcore_grok_prfpreg (abfd
, note
)
5432 Elf_Internal_Note
*note
;
5434 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
5437 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5438 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5442 elfcore_grok_prxfpreg (abfd
, note
)
5444 Elf_Internal_Note
*note
;
5446 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
5449 #if defined (HAVE_PRPSINFO_T)
5450 typedef prpsinfo_t elfcore_psinfo_t
;
5451 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5452 typedef prpsinfo32_t elfcore_psinfo32_t
;
5456 #if defined (HAVE_PSINFO_T)
5457 typedef psinfo_t elfcore_psinfo_t
;
5458 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5459 typedef psinfo32_t elfcore_psinfo32_t
;
5463 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_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 elfcore_strndup (abfd
, start
, max
)
5476 char *end
= memchr (start
, '\0', max
);
5484 dup
= bfd_alloc (abfd
, len
+ 1);
5488 memcpy (dup
, start
, len
);
5495 elfcore_grok_psinfo (abfd
, note
)
5497 Elf_Internal_Note
*note
;
5499 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
5501 elfcore_psinfo_t psinfo
;
5503 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5505 elf_tdata (abfd
)->core_program
5506 = elfcore_strndup (abfd
, psinfo
.pr_fname
, sizeof (psinfo
.pr_fname
));
5508 elf_tdata (abfd
)->core_command
5509 = elfcore_strndup (abfd
, psinfo
.pr_psargs
, sizeof (psinfo
.pr_psargs
));
5511 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5512 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
5514 /* 64-bit host, 32-bit corefile */
5515 elfcore_psinfo32_t psinfo
;
5517 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5519 elf_tdata (abfd
)->core_program
5520 = elfcore_strndup (abfd
, psinfo
.pr_fname
, sizeof (psinfo
.pr_fname
));
5522 elf_tdata (abfd
)->core_command
5523 = elfcore_strndup (abfd
, psinfo
.pr_psargs
, sizeof (psinfo
.pr_psargs
));
5529 /* Fail - we don't know how to handle any other
5530 note size (ie. data object type). */
5534 /* Note that for some reason, a spurious space is tacked
5535 onto the end of the args in some (at least one anyway)
5536 implementations, so strip it off if it exists. */
5539 char *command
= elf_tdata (abfd
)->core_command
;
5540 int n
= strlen (command
);
5542 if (0 < n
&& command
[n
- 1] == ' ')
5543 command
[n
- 1] = '\0';
5548 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5550 #if defined (HAVE_PSTATUS_T)
5552 elfcore_grok_pstatus (abfd
, note
)
5554 Elf_Internal_Note
*note
;
5556 if (note
->descsz
== sizeof (pstatus_t
))
5560 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5562 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5564 #if defined (HAVE_PSTATUS32_T)
5565 else if (note
->descsz
== sizeof (pstatus32_t
))
5567 /* 64-bit host, 32-bit corefile */
5570 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5572 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5575 /* Could grab some more details from the "representative"
5576 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5577 NT_LWPSTATUS note, presumably. */
5581 #endif /* defined (HAVE_PSTATUS_T) */
5583 #if defined (HAVE_LWPSTATUS_T)
5585 elfcore_grok_lwpstatus (abfd
, note
)
5587 Elf_Internal_Note
*note
;
5589 lwpstatus_t lwpstat
;
5594 if (note
->descsz
!= sizeof (lwpstat
))
5597 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5599 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5600 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5602 /* Make a ".reg/999" section. */
5604 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5605 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5610 sect
= bfd_make_section (abfd
, name
);
5614 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5615 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5616 sect
->filepos
= note
->descpos
5617 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5620 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5621 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5622 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5625 sect
->flags
= SEC_HAS_CONTENTS
;
5626 sect
->alignment_power
= 2;
5628 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5631 /* Make a ".reg2/999" section */
5633 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5634 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5639 sect
= bfd_make_section (abfd
, name
);
5643 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5644 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5645 sect
->filepos
= note
->descpos
5646 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5649 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5650 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5651 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5654 sect
->flags
= SEC_HAS_CONTENTS
;
5655 sect
->alignment_power
= 2;
5657 if (!elfcore_maybe_make_sect (abfd
, ".reg2", sect
))
5662 #endif /* defined (HAVE_LWPSTATUS_T) */
5664 #if defined (HAVE_WIN32_PSTATUS_T)
5666 elfcore_grok_win32pstatus (abfd
, note
)
5668 Elf_Internal_Note
*note
;
5673 win32_pstatus_t pstatus
;
5675 if (note
->descsz
< sizeof (pstatus
))
5678 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
5680 switch (pstatus
.data_type
)
5682 case NOTE_INFO_PROCESS
:
5683 /* FIXME: need to add ->core_command. */
5684 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
5685 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
5688 case NOTE_INFO_THREAD
:
5689 /* Make a ".reg/999" section. */
5690 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
5692 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5698 sect
= bfd_make_section (abfd
, name
);
5702 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
5703 sect
->filepos
= note
->descpos
+ offsetof (struct win32_pstatus
,
5704 data
.thread_info
.thread_context
);
5705 sect
->flags
= SEC_HAS_CONTENTS
;
5706 sect
->alignment_power
= 2;
5708 if (pstatus
.data
.thread_info
.is_active_thread
)
5709 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5713 case NOTE_INFO_MODULE
:
5714 /* Make a ".module/xxxxxxxx" section. */
5715 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
5717 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5723 sect
= bfd_make_section (abfd
, name
);
5728 sect
->_raw_size
= note
->descsz
;
5729 sect
->filepos
= note
->descpos
;
5730 sect
->flags
= SEC_HAS_CONTENTS
;
5731 sect
->alignment_power
= 2;
5740 #endif /* HAVE_WIN32_PSTATUS_T */
5743 elfcore_grok_note (abfd
, note
)
5745 Elf_Internal_Note
*note
;
5752 #if defined (HAVE_PRSTATUS_T)
5754 return elfcore_grok_prstatus (abfd
, note
);
5757 #if defined (HAVE_PSTATUS_T)
5759 return elfcore_grok_pstatus (abfd
, note
);
5762 #if defined (HAVE_LWPSTATUS_T)
5764 return elfcore_grok_lwpstatus (abfd
, note
);
5767 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5768 return elfcore_grok_prfpreg (abfd
, note
);
5770 #if defined (HAVE_WIN32_PSTATUS_T)
5771 case NT_WIN32PSTATUS
:
5772 return elfcore_grok_win32pstatus (abfd
, note
);
5775 case NT_PRXFPREG
: /* Linux SSE extension */
5776 if (note
->namesz
== 5
5777 && ! strcmp (note
->namedata
, "LINUX"))
5778 return elfcore_grok_prxfpreg (abfd
, note
);
5782 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5785 return elfcore_grok_psinfo (abfd
, note
);
5791 elfcore_read_notes (abfd
, offset
, size
)
5802 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5805 buf
= bfd_malloc ((size_t) size
);
5809 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5817 while (p
< buf
+ size
)
5819 /* FIXME: bad alignment assumption. */
5820 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
5821 Elf_Internal_Note in
;
5823 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5825 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5826 in
.namedata
= xnp
->name
;
5828 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5829 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5830 in
.descpos
= offset
+ (in
.descdata
- buf
);
5832 if (! elfcore_grok_note (abfd
, &in
))
5835 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5842 /* FIXME: This function is now unnecessary. Callers can just call
5843 bfd_section_from_phdr directly. */
5846 _bfd_elfcore_section_from_phdr (abfd
, phdr
, sec_num
)
5848 Elf_Internal_Phdr
* phdr
;
5851 if (! bfd_section_from_phdr (abfd
, phdr
, sec_num
))
5857 /* Providing external access to the ELF program header table. */
5859 /* Return an upper bound on the number of bytes required to store a
5860 copy of ABFD's program header table entries. Return -1 if an error
5861 occurs; bfd_get_error will return an appropriate code. */
5864 bfd_get_elf_phdr_upper_bound (abfd
)
5867 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5869 bfd_set_error (bfd_error_wrong_format
);
5873 return (elf_elfheader (abfd
)->e_phnum
5874 * sizeof (Elf_Internal_Phdr
));
5877 /* Copy ABFD's program header table entries to *PHDRS. The entries
5878 will be stored as an array of Elf_Internal_Phdr structures, as
5879 defined in include/elf/internal.h. To find out how large the
5880 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5882 Return the number of program header table entries read, or -1 if an
5883 error occurs; bfd_get_error will return an appropriate code. */
5886 bfd_get_elf_phdrs (abfd
, phdrs
)
5892 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5894 bfd_set_error (bfd_error_wrong_format
);
5898 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
5899 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
5900 num_phdrs
* sizeof (Elf_Internal_Phdr
));