1 /* ELF executable support for BFD.
2 Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
4 Written by Fred Fish @ Cygnus Support, from information published
5 in "UNIX System V Release 4, Programmers Guide: ANSI C and
6 Programming Support Tools". Sufficient support for gdb.
8 Rewritten by Mark Eichin @ Cygnus Support, from information
9 published in "System V Application Binary Interface", chapters 4
10 and 5, as well as the various "Processor Supplement" documents
11 derived from it. Added support for assembler and other object file
12 utilities. Further work done by Ken Raeburn (Cygnus Support), Michael
13 Meissner (Open Software Foundation), and Peter Hoogenboom (University
14 of Utah) to finish and extend this.
16 This file is part of BFD, the Binary File Descriptor library.
18 This program is free software; you can redistribute it and/or modify
19 it under the terms of the GNU General Public License as published by
20 the Free Software Foundation; either version 2 of the License, or
21 (at your option) any later version.
23 This program is distributed in the hope that it will be useful,
24 but WITHOUT ANY WARRANTY; without even the implied warranty of
25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 GNU General Public License for more details.
28 You should have received a copy of the GNU General Public License
29 along with this program; if not, write to the Free Software
30 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
32 /* Problems and other issues to resolve.
34 (1) BFD expects there to be some fixed number of "sections" in
35 the object file. I.E. there is a "section_count" variable in the
36 bfd structure which contains the number of sections. However, ELF
37 supports multiple "views" of a file. In particular, with current
38 implementations, executable files typically have two tables, a
39 program header table and a section header table, both of which
40 partition the executable.
42 In ELF-speak, the "linking view" of the file uses the section header
43 table to access "sections" within the file, and the "execution view"
44 uses the program header table to access "segments" within the file.
45 "Segments" typically may contain all the data from one or more
48 Note that the section header table is optional in ELF executables,
49 but it is this information that is most useful to gdb. If the
50 section header table is missing, then gdb should probably try
51 to make do with the program header table. (FIXME)
53 (2) The code in this file is compiled twice, once in 32-bit mode and
54 once in 64-bit mode. More of it should be made size-independent
57 (3) ELF section symbols are handled rather sloppily now. This should
58 be cleaned up, and ELF section symbols reconciled with BFD section
63 #include <string.h> /* For strrchr and friends */
73 /* Renaming structures, typedefs, macros and functions to be size-specific. */
74 #define Elf_External_Ehdr NAME(Elf,External_Ehdr)
75 #define Elf_External_Sym NAME(Elf,External_Sym)
76 #define Elf_External_Shdr NAME(Elf,External_Shdr)
77 #define Elf_External_Phdr NAME(Elf,External_Phdr)
78 #define Elf_External_Rel NAME(Elf,External_Rel)
79 #define Elf_External_Rela NAME(Elf,External_Rela)
81 #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command)
82 #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal)
83 #define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p)
84 #define elf_object_p NAME(bfd_elf,object_p)
85 #define elf_core_file_p NAME(bfd_elf,core_file_p)
86 #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound)
87 #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound)
88 #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc)
89 #define elf_get_symtab NAME(bfd_elf,get_symtab)
90 #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol)
91 #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info)
92 #define elf_print_symbol NAME(bfd_elf,print_symbol)
93 #define elf_get_lineno NAME(bfd_elf,get_lineno)
94 #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach)
95 #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line)
96 #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers)
97 #define elf_set_section_contents NAME(bfd_elf,set_section_contents)
98 #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
99 #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
100 #define elf_new_section_hook NAME(bfd_elf,new_section_hook)
101 #define write_relocs NAME(bfd_elf,_write_relocs)
102 #define elf_find_section NAME(bfd_elf,find_section)
105 #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
106 #define ELF_R_SYM(X) ELF64_R_SYM(X)
107 #define ELFCLASS ELFCLASS64
111 #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y)
112 #define ELF_R_SYM(X) ELF32_R_SYM(X)
113 #define ELFCLASS ELFCLASS32
117 static int shstrtab_length_fixed
;
119 struct elf_sect_data
{
124 /* Forward declarations of static functions */
126 static struct sec
* section_from_elf_index
PARAMS ((bfd
*, int));
128 static int elf_section_from_bfd_section
PARAMS ((bfd
*, struct sec
*));
130 static boolean elf_slurp_symbol_table
PARAMS ((bfd
*, asymbol
**));
132 static int elf_symbol_from_bfd_symbol
PARAMS ((bfd
*,
133 struct symbol_cache_entry
**));
135 static boolean elf_map_symbols
PARAMS ((bfd
*));
136 static boolean swap_out_syms
PARAMS ((bfd
*));
139 static void elf_debug_section
PARAMS ((char *, int, Elf_Internal_Shdr
*));
140 static void elf_debug_file
PARAMS ((Elf_Internal_Ehdr
*));
143 #define elf_string_from_elf_strtab(abfd,strindex) \
144 elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
147 /* Structure swapping routines */
149 /* Should perhaps use put_offset, put_word, etc. For now, the two versions
150 can be handled by explicitly specifying 32 bits or "the long type". */
152 #define put_word bfd_h_put_64
153 #define get_word bfd_h_get_64
156 #define put_word bfd_h_put_32
157 #define get_word bfd_h_get_32
160 /* Translate an ELF symbol in external format into an ELF symbol in internal
164 DEFUN (elf_swap_symbol_in
, (abfd
, src
, dst
),
166 Elf_External_Sym
* src AND
167 Elf_Internal_Sym
* dst
)
169 dst
->st_name
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->st_name
);
170 dst
->st_value
= get_word (abfd
, (bfd_byte
*) src
->st_value
);
171 dst
->st_size
= get_word (abfd
, (bfd_byte
*) src
->st_size
);
172 dst
->st_info
= bfd_h_get_8 (abfd
, (bfd_byte
*) src
->st_info
);
173 dst
->st_other
= bfd_h_get_8 (abfd
, (bfd_byte
*) src
->st_other
);
174 dst
->st_shndx
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->st_shndx
);
177 /* Translate an ELF symbol in internal format into an ELF symbol in external
181 DEFUN (elf_swap_symbol_out
, (abfd
, src
, dst
),
183 Elf_Internal_Sym
* src AND
184 Elf_External_Sym
* dst
)
186 bfd_h_put_32 (abfd
, src
->st_name
, dst
->st_name
);
187 put_word (abfd
, src
->st_value
, dst
->st_value
);
188 put_word (abfd
, src
->st_size
, dst
->st_size
);
189 bfd_h_put_8 (abfd
, src
->st_info
, dst
->st_info
);
190 bfd_h_put_8 (abfd
, src
->st_other
, dst
->st_other
);
191 bfd_h_put_16 (abfd
, src
->st_shndx
, dst
->st_shndx
);
195 /* Translate an ELF file header in external format into an ELF file header in
199 DEFUN (elf_swap_ehdr_in
, (abfd
, src
, dst
),
201 Elf_External_Ehdr
* src AND
202 Elf_Internal_Ehdr
* dst
)
204 memcpy (dst
->e_ident
, src
->e_ident
, EI_NIDENT
);
205 dst
->e_type
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_type
);
206 dst
->e_machine
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_machine
);
207 dst
->e_version
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->e_version
);
208 dst
->e_entry
= get_word (abfd
, (bfd_byte
*) src
->e_entry
);
209 dst
->e_phoff
= get_word (abfd
, (bfd_byte
*) src
->e_phoff
);
210 dst
->e_shoff
= get_word (abfd
, (bfd_byte
*) src
->e_shoff
);
211 dst
->e_flags
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->e_flags
);
212 dst
->e_ehsize
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_ehsize
);
213 dst
->e_phentsize
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_phentsize
);
214 dst
->e_phnum
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_phnum
);
215 dst
->e_shentsize
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_shentsize
);
216 dst
->e_shnum
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_shnum
);
217 dst
->e_shstrndx
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
->e_shstrndx
);
220 /* Translate an ELF file header in internal format into an ELF file header in
224 DEFUN (elf_swap_ehdr_out
, (abfd
, src
, dst
),
226 Elf_Internal_Ehdr
* src AND
227 Elf_External_Ehdr
* dst
)
229 memcpy (dst
->e_ident
, src
->e_ident
, EI_NIDENT
);
230 /* note that all elements of dst are *arrays of unsigned char* already... */
231 bfd_h_put_16 (abfd
, src
->e_type
, dst
->e_type
);
232 bfd_h_put_16 (abfd
, src
->e_machine
, dst
->e_machine
);
233 bfd_h_put_32 (abfd
, src
->e_version
, dst
->e_version
);
234 put_word (abfd
, src
->e_entry
, dst
->e_entry
);
235 put_word (abfd
, src
->e_phoff
, dst
->e_phoff
);
236 put_word (abfd
, src
->e_shoff
, dst
->e_shoff
);
237 bfd_h_put_32 (abfd
, src
->e_flags
, dst
->e_flags
);
238 bfd_h_put_16 (abfd
, src
->e_ehsize
, dst
->e_ehsize
);
239 bfd_h_put_16 (abfd
, src
->e_phentsize
, dst
->e_phentsize
);
240 bfd_h_put_16 (abfd
, src
->e_phnum
, dst
->e_phnum
);
241 bfd_h_put_16 (abfd
, src
->e_shentsize
, dst
->e_shentsize
);
242 bfd_h_put_16 (abfd
, src
->e_shnum
, dst
->e_shnum
);
243 bfd_h_put_16 (abfd
, src
->e_shstrndx
, dst
->e_shstrndx
);
247 /* Translate an ELF section header table entry in external format into an
248 ELF section header table entry in internal format. */
251 DEFUN (elf_swap_shdr_in
, (abfd
, src
, dst
),
253 Elf_External_Shdr
* src AND
254 Elf_Internal_Shdr
* dst
)
256 dst
->sh_name
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_name
);
257 dst
->sh_type
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_type
);
258 dst
->sh_flags
= get_word (abfd
, (bfd_byte
*) src
->sh_flags
);
259 dst
->sh_addr
= get_word (abfd
, (bfd_byte
*) src
->sh_addr
);
260 dst
->sh_offset
= get_word (abfd
, (bfd_byte
*) src
->sh_offset
);
261 dst
->sh_size
= get_word (abfd
, (bfd_byte
*) src
->sh_size
);
262 dst
->sh_link
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_link
);
263 dst
->sh_info
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_info
);
264 dst
->sh_addralign
= get_word (abfd
, (bfd_byte
*) src
->sh_addralign
);
265 dst
->sh_entsize
= get_word (abfd
, (bfd_byte
*) src
->sh_entsize
);
266 /* we haven't done any processing on it yet, so... */
267 dst
->rawdata
= (void *) 0;
270 /* Translate an ELF section header table entry in internal format into an
271 ELF section header table entry in external format. */
274 DEFUN (elf_swap_shdr_out
, (abfd
, src
, dst
),
276 Elf_Internal_Shdr
* src AND
277 Elf_External_Shdr
* dst
)
279 /* note that all elements of dst are *arrays of unsigned char* already... */
280 bfd_h_put_32 (abfd
, src
->sh_name
, dst
->sh_name
);
281 bfd_h_put_32 (abfd
, src
->sh_type
, dst
->sh_type
);
282 put_word (abfd
, src
->sh_flags
, dst
->sh_flags
);
283 put_word (abfd
, src
->sh_addr
, dst
->sh_addr
);
284 put_word (abfd
, src
->sh_offset
, dst
->sh_offset
);
285 put_word (abfd
, src
->sh_size
, dst
->sh_size
);
286 bfd_h_put_32 (abfd
, src
->sh_link
, dst
->sh_link
);
287 bfd_h_put_32 (abfd
, src
->sh_info
, dst
->sh_info
);
288 put_word (abfd
, src
->sh_addralign
, dst
->sh_addralign
);
289 put_word (abfd
, src
->sh_entsize
, dst
->sh_entsize
);
293 /* Translate an ELF program header table entry in external format into an
294 ELF program header table entry in internal format. */
297 DEFUN (elf_swap_phdr_in
, (abfd
, src
, dst
),
299 Elf_External_Phdr
* src AND
300 Elf_Internal_Phdr
* dst
)
302 dst
->p_type
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_type
);
303 dst
->p_flags
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_flags
);
304 dst
->p_offset
= get_word (abfd
, (bfd_byte
*) src
->p_offset
);
305 dst
->p_vaddr
= get_word (abfd
, (bfd_byte
*) src
->p_vaddr
);
306 dst
->p_paddr
= get_word (abfd
, (bfd_byte
*) src
->p_paddr
);
307 dst
->p_filesz
= get_word (abfd
, (bfd_byte
*) src
->p_filesz
);
308 dst
->p_memsz
= get_word (abfd
, (bfd_byte
*) src
->p_memsz
);
309 dst
->p_align
= get_word (abfd
, (bfd_byte
*) src
->p_align
);
313 DEFUN (elf_swap_phdr_out
, (abfd
, src
, dst
),
315 Elf_Internal_Phdr
* src AND
316 Elf_External_Phdr
* dst
)
318 /* note that all elements of dst are *arrays of unsigned char* already... */
319 bfd_h_put_32 (abfd
, src
->p_type
, dst
->p_type
);
320 put_word (abfd
, src
->p_offset
, dst
->p_offset
);
321 put_word (abfd
, src
->p_vaddr
, dst
->p_vaddr
);
322 put_word (abfd
, src
->p_paddr
, dst
->p_paddr
);
323 put_word (abfd
, src
->p_filesz
, dst
->p_filesz
);
324 put_word (abfd
, src
->p_memsz
, dst
->p_memsz
);
325 bfd_h_put_32 (abfd
, src
->p_flags
, dst
->p_flags
);
326 put_word (abfd
, src
->p_align
, dst
->p_align
);
329 /* Translate an ELF reloc from external format to internal format. */
331 DEFUN (elf_swap_reloc_in
, (abfd
, src
, dst
),
333 Elf_External_Rel
* src AND
334 Elf_Internal_Rel
* dst
)
336 dst
->r_offset
= get_word (abfd
, (bfd_byte
*) src
->r_offset
);
337 dst
->r_info
= get_word (abfd
, (bfd_byte
*) src
->r_info
);
341 DEFUN (elf_swap_reloca_in
, (abfd
, src
, dst
),
343 Elf_External_Rela
* src AND
344 Elf_Internal_Rela
* dst
)
346 dst
->r_offset
= get_word (abfd
, (bfd_byte
*) src
->r_offset
);
347 dst
->r_info
= get_word (abfd
, (bfd_byte
*) src
->r_info
);
348 dst
->r_addend
= get_word (abfd
, (bfd_byte
*) src
->r_addend
);
351 /* Translate an ELF reloc from internal format to external format. */
353 DEFUN (elf_swap_reloc_out
, (abfd
, src
, dst
),
355 Elf_Internal_Rel
* src AND
356 Elf_External_Rel
* dst
)
358 put_word (abfd
, src
->r_offset
, dst
->r_offset
);
359 put_word (abfd
, src
->r_info
, dst
->r_info
);
363 DEFUN (elf_swap_reloca_out
, (abfd
, src
, dst
),
365 Elf_Internal_Rela
* src AND
366 Elf_External_Rela
* dst
)
368 put_word (abfd
, src
->r_offset
, dst
->r_offset
);
369 put_word (abfd
, src
->r_info
, dst
->r_info
);
370 put_word (abfd
, src
->r_addend
, dst
->r_addend
);
375 /* String table creation/manipulation routines */
377 static struct strtab
*
378 DEFUN (bfd_new_strtab
, (abfd
),
383 ss
= (struct strtab
*) malloc (sizeof (struct strtab
));
386 bfd_set_error (bfd_error_no_memory
);
389 ss
->tab
= malloc (1);
392 bfd_set_error (bfd_error_no_memory
);
403 DEFUN (bfd_add_to_strtab
, (abfd
, ss
, str
),
405 struct strtab
*ss AND
408 /* should search first, but for now: */
409 /* include the trailing NUL */
410 int ln
= strlen (str
) + 1;
412 /* should this be using obstacks? */
413 ss
->tab
= realloc (ss
->tab
, ss
->length
+ ln
);
415 BFD_ASSERT (ss
->tab
!= 0); /* FIXME */
416 strcpy (ss
->tab
+ ss
->length
, str
);
420 return ss
->length
- ln
;
424 DEFUN (bfd_add_2_to_strtab
, (abfd
, ss
, str
, str2
),
426 struct strtab
*ss AND
430 /* should search first, but for now: */
431 /* include the trailing NUL */
432 int ln
= strlen (str
) + strlen (str2
) + 1;
434 /* should this be using obstacks? */
436 ss
->tab
= realloc (ss
->tab
, ss
->length
+ ln
);
438 ss
->tab
= malloc (ln
);
440 BFD_ASSERT (ss
->tab
!= 0); /* FIXME */
441 strcpy (ss
->tab
+ ss
->length
, str
);
442 strcpy (ss
->tab
+ ss
->length
+ strlen (str
), str2
);
446 return ss
->length
- ln
;
450 /* ELF .o/exec file reading */
452 /* Create a new bfd section from an ELF section header. */
455 DEFUN (bfd_section_from_shdr
, (abfd
, shindex
),
457 unsigned int shindex
)
459 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
460 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
464 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
466 switch (hdr
->sh_type
)
470 /* inactive section. Throw it away. */
474 /* Bits that get saved. This one is real. */
477 newsect
= bfd_make_section (abfd
, name
);
480 newsect
->filepos
= hdr
->sh_offset
; /* so we can read back the bits */
481 newsect
->flags
|= SEC_HAS_CONTENTS
;
482 newsect
->vma
= hdr
->sh_addr
;
483 newsect
->_raw_size
= hdr
->sh_size
;
484 newsect
->alignment_power
= bfd_log2 (hdr
->sh_addralign
);
486 if (hdr
->sh_flags
& SHF_ALLOC
)
488 newsect
->flags
|= SEC_ALLOC
;
489 newsect
->flags
|= SEC_LOAD
;
492 if (!(hdr
->sh_flags
& SHF_WRITE
))
493 newsect
->flags
|= SEC_READONLY
;
495 if (hdr
->sh_flags
& SHF_EXECINSTR
)
496 newsect
->flags
|= SEC_CODE
; /* FIXME: may only contain SOME code */
497 else if (newsect
->flags
& SEC_ALLOC
)
498 newsect
->flags
|= SEC_DATA
;
500 /* The debugging sections appear to recognized only by
502 if (strncmp (name
, ".debug", sizeof ".debug" - 1) == 0
503 || strncmp (name
, ".line", sizeof ".line" - 1) == 0
504 || strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
505 newsect
->flags
|= SEC_DEBUGGING
;
507 hdr
->rawdata
= (void *) newsect
;
510 hdr
->rawdata
= (void *) bfd_get_section_by_name (abfd
, name
);
515 /* Bits that get saved. This one is real. */
518 newsect
= bfd_make_section (abfd
, name
);
521 newsect
->vma
= hdr
->sh_addr
;
522 newsect
->_raw_size
= hdr
->sh_size
;
523 newsect
->filepos
= hdr
->sh_offset
; /* fake */
524 newsect
->alignment_power
= bfd_log2 (hdr
->sh_addralign
);
525 if (hdr
->sh_flags
& SHF_ALLOC
)
526 newsect
->flags
|= SEC_ALLOC
;
528 if (!(hdr
->sh_flags
& SHF_WRITE
))
529 newsect
->flags
|= SEC_READONLY
;
531 /* FIXME: This section is empty. Does it really make
532 sense to set SEC_CODE for it? */
533 if (hdr
->sh_flags
& SHF_EXECINSTR
)
534 newsect
->flags
|= SEC_CODE
; /* FIXME: may only contain SOME code */
536 hdr
->rawdata
= (void *) newsect
;
541 case SHT_SYMTAB
: /* A symbol table */
542 if (elf_onesymtab (abfd
) == shindex
)
545 BFD_ASSERT (hdr
->sh_entsize
== sizeof (Elf_External_Sym
));
546 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
547 elf_onesymtab (abfd
) = shindex
;
548 elf_tdata(abfd
)->symtab_hdr
= *hdr
;
549 elf_elfsections(abfd
)[shindex
] = &elf_tdata(abfd
)->symtab_hdr
;
550 abfd
->flags
|= HAS_SYMS
;
553 case SHT_STRTAB
: /* A string table */
556 if (ehdr
->e_shstrndx
== shindex
)
558 elf_tdata(abfd
)->shstrtab_hdr
= *hdr
;
559 elf_elfsections(abfd
)[shindex
] = &elf_tdata(abfd
)->shstrtab_hdr
;
560 hdr
->rawdata
= (PTR
) &elf_tdata(abfd
)->shstrtab_hdr
;
566 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
568 Elf_Internal_Shdr
*hdr2
= elf_elfsections(abfd
)[i
];
569 if (hdr2
->sh_link
== shindex
)
571 bfd_section_from_shdr (abfd
, i
);
572 if (elf_onesymtab (abfd
) == i
)
574 elf_tdata(abfd
)->strtab_hdr
= *hdr
;
575 elf_elfsections(abfd
)[shindex
] = &elf_tdata(abfd
)->strtab_hdr
;
578 #if 0 /* Not handling other string tables specially right now. */
579 hdr2
= elf_elfsections(abfd
)[i
]; /* in case it moved */
580 /* We have a strtab for some random other section. */
581 newsect
= (asection
*) hdr2
->rawdata
;
584 hdr
->rawdata
= (PTR
) newsect
;
585 hdr2
= &elf_section_data (newsect
)->str_hdr
;
587 elf_elfsections(abfd
)[shindex
] = hdr2
;
593 newsect
= bfd_make_section (abfd
, name
);
596 newsect
->flags
= SEC_HAS_CONTENTS
;
597 hdr
->rawdata
= (PTR
) newsect
;
598 newsect
->_raw_size
= hdr
->sh_size
;
599 newsect
->alignment_power
= bfd_log2 (hdr
->sh_addralign
);
600 newsect
->vma
= hdr
->sh_addr
;
601 newsect
->filepos
= hdr
->sh_offset
;
603 if (hdr
->sh_flags
& SHF_ALLOC
)
604 newsect
->flags
|= SEC_ALLOC
|SEC_LOAD
;
605 if (!(hdr
->sh_flags
& SHF_WRITE
))
606 newsect
->flags
|= SEC_READONLY
;
607 if (hdr
->sh_flags
& SHF_EXECINSTR
)
608 newsect
->flags
|= SEC_CODE
;
609 else if (newsect
->flags
& SEC_ALLOC
)
610 newsect
->flags
|= SEC_DATA
;
612 /* Check for debugging string tables. */
613 if (strncmp (name
, ".debug", sizeof ".debug" - 1) == 0
614 || strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
615 newsect
->flags
|= SEC_DEBUGGING
;
622 /* *These* do a lot of work -- but build no sections!
623 The spec says there can be multiple strtabs, but only one symtab,
624 but there can be lots of REL* sections. */
625 /* FIXME: The above statement is wrong! There are typically at least
626 two symbol tables in a dynamically linked executable, ".dynsym"
627 which is the dynamic linkage symbol table and ".symtab", which is
628 the "traditional" symbol table. -fnf */
631 asection
*target_sect
;
632 Elf_Internal_Shdr
*hdr2
;
633 int use_rela_p
= get_elf_backend_data (abfd
)->use_rela_p
;
635 /* Don't allow REL relocations on a machine that uses RELA and
637 /* @@ Actually, the generic ABI does suggest that both might be
638 used in one file. But the four ABI Processor Supplements I
639 have access to right now all specify that only one is used on
640 each of those architectures. It's conceivable that, e.g., a
641 bunch of absolute 32-bit relocs might be more compact in REL
642 form even on a RELA machine... */
643 BFD_ASSERT (!(use_rela_p
&& (hdr
->sh_type
== SHT_REL
)));
644 BFD_ASSERT (!(!use_rela_p
&& (hdr
->sh_type
== SHT_RELA
)));
645 BFD_ASSERT (hdr
->sh_entsize
==
647 ? sizeof (Elf_External_Rela
)
648 : sizeof (Elf_External_Rel
)));
650 bfd_section_from_shdr (abfd
, hdr
->sh_info
); /* target */
651 bfd_section_from_shdr (abfd
, hdr
->sh_link
); /* symbol table */
652 target_sect
= section_from_elf_index (abfd
, hdr
->sh_info
);
653 if (target_sect
== NULL
654 || elf_section_data (target_sect
) == NULL
)
657 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
659 elf_elfsections(abfd
)[shindex
] = hdr2
;
660 target_sect
->reloc_count
= hdr
->sh_size
/ hdr
->sh_entsize
;
661 target_sect
->flags
|= SEC_RELOC
;
662 target_sect
->relocation
= 0;
663 target_sect
->rel_filepos
= hdr
->sh_offset
;
664 abfd
->flags
|= HAS_RELOC
;
671 case SHT_DYNSYM
: /* could treat this like symtab... */
673 fprintf (stderr
, "Dynamic Linking sections not yet supported.\n");
680 fprintf (stderr
, "Note Sections not yet supported.\n");
687 fprintf (stderr
, "SHLIB Sections not supported (and non conforming.)\n");
692 /* Check for any processor-specific section types. */
694 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
696 if (bed
->elf_backend_section_from_shdr
)
697 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
706 DEFUN (elf_new_section_hook
, (abfd
, sec
),
710 struct bfd_elf_section_data
*sdata
;
712 sdata
= (struct bfd_elf_section_data
*) bfd_alloc (abfd
, sizeof (*sdata
));
715 bfd_set_error (bfd_error_no_memory
);
718 sec
->used_by_bfd
= (PTR
) sdata
;
719 memset (sdata
, 0, sizeof (*sdata
));
723 /* Create a new bfd section from an ELF program header.
725 Since program segments have no names, we generate a synthetic name
726 of the form segment<NUM>, where NUM is generally the index in the
727 program header table. For segments that are split (see below) we
728 generate the names segment<NUM>a and segment<NUM>b.
730 Note that some program segments may have a file size that is different than
731 (less than) the memory size. All this means is that at execution the
732 system must allocate the amount of memory specified by the memory size,
733 but only initialize it with the first "file size" bytes read from the
734 file. This would occur for example, with program segments consisting
735 of combined data+bss.
737 To handle the above situation, this routine generates TWO bfd sections
738 for the single program segment. The first has the length specified by
739 the file size of the segment, and the second has the length specified
740 by the difference between the two sizes. In effect, the segment is split
741 into it's initialized and uninitialized parts.
746 DEFUN (bfd_section_from_phdr
, (abfd
, hdr
, index
),
748 Elf_Internal_Phdr
* hdr AND
756 split
= ((hdr
->p_memsz
> 0) &&
757 (hdr
->p_filesz
> 0) &&
758 (hdr
->p_memsz
> hdr
->p_filesz
));
759 sprintf (namebuf
, split
? "segment%da" : "segment%d", index
);
760 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
763 bfd_set_error (bfd_error_no_memory
);
766 strcpy (name
, namebuf
);
767 newsect
= bfd_make_section (abfd
, name
);
768 newsect
->vma
= hdr
->p_vaddr
;
769 newsect
->_raw_size
= hdr
->p_filesz
;
770 newsect
->filepos
= hdr
->p_offset
;
771 newsect
->flags
|= SEC_HAS_CONTENTS
;
772 if (hdr
->p_type
== PT_LOAD
)
774 newsect
->flags
|= SEC_ALLOC
;
775 newsect
->flags
|= SEC_LOAD
;
776 if (hdr
->p_flags
& PF_X
)
778 /* FIXME: all we known is that it has execute PERMISSION,
780 newsect
->flags
|= SEC_CODE
;
783 if (!(hdr
->p_flags
& PF_W
))
785 newsect
->flags
|= SEC_READONLY
;
790 sprintf (namebuf
, "segment%db", index
);
791 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
794 bfd_set_error (bfd_error_no_memory
);
797 strcpy (name
, namebuf
);
798 newsect
= bfd_make_section (abfd
, name
);
799 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
800 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
801 if (hdr
->p_type
== PT_LOAD
)
803 newsect
->flags
|= SEC_ALLOC
;
804 if (hdr
->p_flags
& PF_X
)
805 newsect
->flags
|= SEC_CODE
;
807 if (!(hdr
->p_flags
& PF_W
))
808 newsect
->flags
|= SEC_READONLY
;
814 /* Begin processing a given object.
816 First we validate the file by reading in the ELF header and checking
819 static INLINE boolean
820 DEFUN (elf_file_p
, (x_ehdrp
), Elf_External_Ehdr
* x_ehdrp
)
822 return ((x_ehdrp
->e_ident
[EI_MAG0
] == ELFMAG0
)
823 && (x_ehdrp
->e_ident
[EI_MAG1
] == ELFMAG1
)
824 && (x_ehdrp
->e_ident
[EI_MAG2
] == ELFMAG2
)
825 && (x_ehdrp
->e_ident
[EI_MAG3
] == ELFMAG3
));
828 /* Check to see if the file associated with ABFD matches the target vector
831 Note that we may be called several times with the same ABFD, but different
832 target vectors, most of which will not match. We have to avoid leaving
833 any side effects in ABFD, or any data it points to (like tdata), if the
834 file does not match the target vector.
836 FIXME: There is memory leak if we are called more than once with the same
837 ABFD, and that bfd already has tdata allocated, since we allocate more tdata
838 and the old tdata is orphaned. Since it's in the bfd obstack, there isn't
839 much we can do about this except possibly rewrite the code. There are
840 also other bfd_allocs that may be the source of memory leaks as well. */
843 DEFUN (elf_object_p
, (abfd
), bfd
* abfd
)
845 Elf_External_Ehdr x_ehdr
; /* Elf file header, external form */
846 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
847 Elf_External_Shdr x_shdr
; /* Section header table entry, external form */
848 Elf_Internal_Shdr
*i_shdrp
; /* Section header table, internal form */
850 char *shstrtab
; /* Internal copy of section header stringtab */
851 struct elf_backend_data
*ebd
;
852 struct elf_obj_tdata
*preserved_tdata
= elf_tdata (abfd
);
854 /* Read in the ELF header in external format. */
856 if (bfd_read ((PTR
) & x_ehdr
, sizeof (x_ehdr
), 1, abfd
) != sizeof (x_ehdr
))
857 goto got_system_call
;
859 /* Now check to see if we have a valid ELF file, and one that BFD can
860 make use of. The magic number must match, the address size ('class')
861 and byte-swapping must match our XVEC entry, and it must have a
862 section header table (FIXME: See comments re sections at top of this
865 if ((elf_file_p (&x_ehdr
) == false) ||
866 (x_ehdr
.e_ident
[EI_VERSION
] != EV_CURRENT
) ||
867 (x_ehdr
.e_ident
[EI_CLASS
] != ELFCLASS
))
868 goto got_wrong_format_error
;
870 /* Check that file's byte order matches xvec's */
871 switch (x_ehdr
.e_ident
[EI_DATA
])
873 case ELFDATA2MSB
: /* Big-endian */
874 if (!abfd
->xvec
->header_byteorder_big_p
)
875 goto got_wrong_format_error
;
877 case ELFDATA2LSB
: /* Little-endian */
878 if (abfd
->xvec
->header_byteorder_big_p
)
879 goto got_wrong_format_error
;
881 case ELFDATANONE
: /* No data encoding specified */
882 default: /* Unknown data encoding specified */
883 goto got_wrong_format_error
;
886 /* Allocate an instance of the elf_obj_tdata structure and hook it up to
887 the tdata pointer in the bfd. FIXME: memory leak, see above. */
890 (struct elf_obj_tdata
*) bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
891 if (elf_tdata (abfd
) == NULL
)
892 goto got_no_memory_error
;
894 /* Now that we know the byte order, swap in the rest of the header */
895 i_ehdrp
= elf_elfheader (abfd
);
896 elf_swap_ehdr_in (abfd
, &x_ehdr
, i_ehdrp
);
898 elf_debug_file (i_ehdrp
);
901 /* If there is no section header table, we're hosed. */
902 if (i_ehdrp
->e_shoff
== 0)
903 goto got_wrong_format_error
;
905 /* As a simple sanity check, verify that the what BFD thinks is the
906 size of each section header table entry actually matches the size
907 recorded in the file. */
908 if (i_ehdrp
->e_shentsize
!= sizeof (x_shdr
))
909 goto got_wrong_format_error
;
911 ebd
= get_elf_backend_data (abfd
);
913 /* Check that the ELF e_machine field matches what this particular
914 BFD format expects. */
915 if (ebd
->elf_machine_code
!= i_ehdrp
->e_machine
)
917 bfd_target
**target_ptr
;
919 if (ebd
->elf_machine_code
!= EM_NONE
)
920 goto got_wrong_format_error
;
922 /* This is the generic ELF target. Let it match any ELF target
923 for which we do not have a specific backend. */
924 for (target_ptr
= bfd_target_vector
; *target_ptr
!= NULL
; target_ptr
++)
926 struct elf_backend_data
*back
;
928 if ((*target_ptr
)->flavour
!= bfd_target_elf_flavour
)
930 back
= (struct elf_backend_data
*) (*target_ptr
)->backend_data
;
931 if (back
->elf_machine_code
== i_ehdrp
->e_machine
)
933 /* target_ptr is an ELF backend which matches this
934 object file, so reject the generic ELF target. */
935 goto got_wrong_format_error
;
941 /* Set the flags and architecture before calling the backend so that
942 it can override them. */
943 if (i_ehdrp
->e_type
== ET_EXEC
)
944 abfd
->flags
|= EXEC_P
;
945 else if (i_ehdrp
->e_type
== ET_DYN
)
946 abfd
->flags
|= DYNAMIC
;
948 bfd_default_set_arch_mach (abfd
, ebd
->arch
, 0);
950 /* Remember the entry point specified in the ELF file header. */
951 bfd_get_start_address (abfd
) = i_ehdrp
->e_entry
;
953 /* Let the backend double check the format and override global
955 if (ebd
->elf_backend_object_p
)
957 if ((*ebd
->elf_backend_object_p
) (abfd
) == false)
958 goto got_wrong_format_error
;
961 /* Allocate space for a copy of the section header table in
962 internal form, seek to the section header table in the file,
963 read it in, and convert it to internal form. */
964 i_shdrp
= (Elf_Internal_Shdr
*)
965 bfd_alloc (abfd
, sizeof (*i_shdrp
) * i_ehdrp
->e_shnum
);
966 elf_elfsections (abfd
) =
967 (Elf_Internal_Shdr
**) bfd_alloc (abfd
, sizeof (i_shdrp
) * i_ehdrp
->e_shnum
);
968 if (!i_shdrp
|| !elf_elfsections(abfd
))
969 goto got_no_memory_error
;
970 if (bfd_seek (abfd
, i_ehdrp
->e_shoff
, SEEK_SET
) == -1)
971 goto got_system_call
;
972 for (shindex
= 0; shindex
< i_ehdrp
->e_shnum
; shindex
++)
974 if (bfd_read ((PTR
) & x_shdr
, sizeof x_shdr
, 1, abfd
) != sizeof (x_shdr
))
975 goto got_system_call
;
976 elf_swap_shdr_in (abfd
, &x_shdr
, i_shdrp
+ shindex
);
977 elf_elfsections(abfd
)[shindex
] = i_shdrp
+ shindex
;
979 /* If this is a .dynamic section, mark the object file as being
980 dynamically linked. */
981 if (i_shdrp
[shindex
].sh_type
== SHT_DYNAMIC
)
982 abfd
->flags
|= DYNAMIC
;
984 if (i_ehdrp
->e_shstrndx
)
986 bfd_section_from_shdr (abfd
, i_ehdrp
->e_shstrndx
);
990 for (shindex
= i_ehdrp
->e_shnum
- 1; shindex
>= 0; shindex
--)
992 if (!strcmp (elf_string_from_elf_strtab (abfd
,
993 i_shdrp
[shindex
].sh_name
),
996 elf_tdata(abfd
)->strtab_hdr
= i_shdrp
[shindex
];
997 elf_elfsections(abfd
)[shindex
] = &elf_tdata(abfd
)->strtab_hdr
;
999 else if (!strcmp (elf_string_from_elf_strtab (abfd
,
1000 i_shdrp
[shindex
].sh_name
),
1003 elf_tdata(abfd
)->symtab_hdr
= i_shdrp
[shindex
];
1004 elf_elfsections(abfd
)[shindex
] = &elf_tdata(abfd
)->symtab_hdr
;
1005 elf_onesymtab (abfd
) = shindex
;
1010 /* Read in the string table containing the names of the sections. We
1011 will need the base pointer to this table later. */
1012 /* We read this inline now, so that we don't have to go through
1013 bfd_section_from_shdr with it (since this particular strtab is
1014 used to find all of the ELF section names.) */
1016 shstrtab
= elf_get_str_section (abfd
, i_ehdrp
->e_shstrndx
);
1018 goto got_wrong_format_error
;
1020 /* Once all of the section headers have been read and converted, we
1021 can start processing them. Note that the first section header is
1022 a dummy placeholder entry, so we ignore it.
1024 We also watch for the symbol table section and remember the file
1025 offset and section size for both the symbol table section and the
1026 associated string table section. */
1028 for (shindex
= 1; shindex
< i_ehdrp
->e_shnum
; shindex
++)
1030 bfd_section_from_shdr (abfd
, shindex
);
1033 return (abfd
->xvec
);
1035 /* If we are going to use goto's to avoid duplicating error setting
1036 and return(NULL) code, then this at least makes it more maintainable. */
1039 bfd_set_error (bfd_error_system_call
);
1041 got_wrong_format_error
:
1042 bfd_set_error (bfd_error_wrong_format
);
1044 got_no_memory_error
:
1045 bfd_set_error (bfd_error_no_memory
);
1048 elf_tdata (abfd
) = preserved_tdata
;
1053 /* ELF .o/exec file writing */
1055 /* Takes a bfd and a symbol, returns a pointer to the elf specific area
1056 of the symbol if there is one. */
1057 static INLINE elf_symbol_type
*
1058 DEFUN (elf_symbol_from
, (ignore_abfd
, symbol
),
1059 bfd
* ignore_abfd AND
1062 if (symbol
->the_bfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
1065 if (symbol
->the_bfd
->tdata
.elf_obj_data
== (struct elf_obj_tdata
*) NULL
)
1068 return (elf_symbol_type
*) symbol
;
1071 /* Create ELF output from BFD sections.
1073 Essentially, just create the section header and forget about the program
1077 DEFUN (elf_make_sections
, (abfd
, asect
, obj
),
1079 asection
* asect AND
1082 /* most of what is in bfd_shdr_from_section goes in here... */
1083 /* and all of these sections generate at *least* one ELF section. */
1084 Elf_Internal_Shdr
*this_hdr
;
1085 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1087 this_hdr
->sh_addr
= asect
->vma
;
1088 this_hdr
->sh_size
= asect
->_raw_size
;
1089 /* contents already set by elf_set_section_contents */
1091 if (asect
->flags
& SEC_RELOC
)
1093 /* emit a reloc section, and thus strtab and symtab... */
1094 Elf_Internal_Shdr
*rela_hdr
;
1095 int use_rela_p
= get_elf_backend_data (abfd
)->use_rela_p
;
1097 rela_hdr
= &elf_section_data (asect
)->rel_hdr
;
1099 /* orelocation has the data, reloc_count has the count... */
1102 rela_hdr
->sh_type
= SHT_RELA
;
1103 rela_hdr
->sh_entsize
= sizeof (Elf_External_Rela
);
1106 /* REL relocations */
1108 rela_hdr
->sh_type
= SHT_REL
;
1109 rela_hdr
->sh_entsize
= sizeof (Elf_External_Rel
);
1111 rela_hdr
->sh_flags
= 0;
1112 rela_hdr
->sh_addr
= 0;
1113 rela_hdr
->sh_offset
= 0;
1115 /* FIXME: Systems I've checked use an alignment of 4, but it is
1116 possible that some systems use a different alignment. */
1117 rela_hdr
->sh_addralign
= 4;
1121 if (asect
->flags
& SEC_ALLOC
)
1123 this_hdr
->sh_flags
|= SHF_ALLOC
;
1124 if (asect
->flags
& SEC_LOAD
)
1126 /* @@ Do something with sh_type? */
1131 /* If this section is not part of the program image during
1132 execution, leave the address fields at 0. */
1133 this_hdr
->sh_addr
= 0;
1136 if (!(asect
->flags
& SEC_READONLY
))
1137 this_hdr
->sh_flags
|= SHF_WRITE
;
1139 if (asect
->flags
& SEC_CODE
)
1140 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1144 write_relocs (abfd
, sec
, xxx
)
1149 Elf_Internal_Shdr
*rela_hdr
;
1150 Elf_External_Rela
*outbound_relocas
;
1151 Elf_External_Rel
*outbound_relocs
;
1153 int use_rela_p
= get_elf_backend_data (abfd
)->use_rela_p
;
1154 asymbol
*last_sym
= 0;
1155 int last_sym_idx
= 9999999; /* should always be written before use */
1157 if ((sec
->flags
& SEC_RELOC
) == 0)
1159 /* Flags are sometimes inconsistent. */
1160 if (sec
->reloc_count
== 0)
1163 rela_hdr
= &elf_section_data (sec
)->rel_hdr
;
1165 rela_hdr
->sh_size
= rela_hdr
->sh_entsize
* sec
->reloc_count
;
1166 rela_hdr
->contents
= (void *) bfd_alloc (abfd
, rela_hdr
->sh_size
);
1167 if (!rela_hdr
->contents
)
1169 bfd_set_error (bfd_error_no_memory
);
1170 abort(); /* FIXME */
1173 /* orelocation has the data, reloc_count has the count... */
1176 outbound_relocas
= (Elf_External_Rela
*) rela_hdr
->contents
;
1178 for (idx
= 0; idx
< sec
->reloc_count
; idx
++)
1180 Elf_Internal_Rela dst_rela
;
1181 Elf_External_Rela
*src_rela
;
1186 ptr
= sec
->orelocation
[idx
];
1187 src_rela
= outbound_relocas
+ idx
;
1188 if (!(abfd
->flags
& EXEC_P
))
1189 dst_rela
.r_offset
= ptr
->address
- sec
->vma
;
1191 dst_rela
.r_offset
= ptr
->address
;
1193 sym
= *ptr
->sym_ptr_ptr
;
1194 if (sym
== last_sym
)
1199 last_sym_idx
= n
= elf_symbol_from_bfd_symbol (abfd
, &sym
);
1201 dst_rela
.r_info
= ELF_R_INFO (n
, ptr
->howto
->type
);
1203 dst_rela
.r_addend
= ptr
->addend
;
1204 elf_swap_reloca_out (abfd
, &dst_rela
, src_rela
);
1208 /* REL relocations */
1210 outbound_relocs
= (Elf_External_Rel
*) rela_hdr
->contents
;
1212 for (idx
= 0; idx
< sec
->reloc_count
; idx
++)
1214 Elf_Internal_Rel dst_rel
;
1215 Elf_External_Rel
*src_rel
;
1220 ptr
= sec
->orelocation
[idx
];
1221 sym
= *ptr
->sym_ptr_ptr
;
1222 src_rel
= outbound_relocs
+ idx
;
1223 if (!(abfd
->flags
& EXEC_P
))
1224 dst_rel
.r_offset
= ptr
->address
- sec
->vma
;
1226 dst_rel
.r_offset
= ptr
->address
;
1228 if (sym
== last_sym
)
1233 last_sym_idx
= n
= elf_symbol_from_bfd_symbol (abfd
, &sym
);
1235 dst_rel
.r_info
= ELF_R_INFO (n
, ptr
->howto
->type
);
1237 elf_swap_reloc_out (abfd
, &dst_rel
, src_rel
);
1243 fix_up_strtabs (abfd
, asect
, obj
)
1248 Elf_Internal_Shdr
*this_hdr
= &elf_section_data (asect
)->this_hdr
;
1249 int this_idx
= elf_section_data(asect
)->this_idx
;
1251 /* @@ Check flags! */
1252 if (!strncmp (asect
->name
, ".stab", 5)
1253 && !strcmp ("str", asect
->name
+ strlen (asect
->name
) - 3))
1255 size_t len
= strlen (asect
->name
) + 1;
1256 char *s
= (char *) alloca (len
);
1257 strcpy (s
, asect
->name
);
1259 asect
= bfd_get_section_by_name (abfd
, s
);
1262 elf_section_data(asect
)->this_hdr
.sh_link
= this_idx
;
1263 /* @@ Assuming 32 bits! */
1264 elf_section_data(asect
)->this_hdr
.sh_entsize
= 0xc;
1266 this_hdr
->sh_type
= SHT_STRTAB
;
1271 DEFUN (elf_fake_sections
, (abfd
, asect
, obj
),
1273 asection
* asect AND
1276 /* most of what is in bfd_shdr_from_section goes in here... */
1277 /* and all of these sections generate at *least* one ELF section. */
1279 Elf_Internal_Shdr
*this_hdr
;
1280 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1282 bfd_add_to_strtab (abfd
, elf_shstrtab (abfd
), asect
->name
);
1283 /* We need to log the type *now* so that elf_section_from_bfd_section
1284 can find us... have to set rawdata too. */
1285 this_hdr
->rawdata
= (void *) asect
;
1286 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1287 if ((asect
->flags
& SEC_ALLOC
) && (asect
->flags
& SEC_LOAD
))
1288 this_hdr
->sh_type
= SHT_PROGBITS
;
1289 else if ((asect
->flags
& SEC_ALLOC
) && ((asect
->flags
& SEC_LOAD
) == 0))
1291 BFD_ASSERT (strcmp (asect
->name
, ".bss") == 0
1292 || strcmp (asect
->name
, ".sbss") == 0);
1293 this_hdr
->sh_type
= SHT_NOBITS
;
1295 /* FIXME I am not sure how to detect a .note section from the flags
1296 word of an `asection'. */
1297 else if (!strcmp (asect
->name
, ".note"))
1298 this_hdr
->sh_type
= SHT_NOTE
;
1300 this_hdr
->sh_type
= SHT_PROGBITS
;
1302 this_hdr
->sh_flags
= 0;
1303 this_hdr
->sh_addr
= 0;
1304 this_hdr
->sh_size
= 0;
1305 this_hdr
->sh_entsize
= 0;
1306 this_hdr
->sh_info
= 0;
1307 this_hdr
->sh_link
= 0;
1308 this_hdr
->sh_offset
= 0;
1311 /* Now, check for processor-specific section types. */
1313 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1315 if (bed
->elf_backend_fake_sections
)
1316 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1320 /* Emit a strtab and symtab, and possibly a reloc section. */
1321 Elf_Internal_Shdr
*rela_hdr
;
1323 /* Note that only one symtab is used, so just remember it
1326 if (asect
->flags
& SEC_RELOC
)
1328 int use_rela_p
= get_elf_backend_data (abfd
)->use_rela_p
;
1330 rela_hdr
= &elf_section_data (asect
)->rel_hdr
;
1332 bfd_add_2_to_strtab (abfd
, elf_shstrtab (abfd
),
1333 use_rela_p
? ".rela" : ".rel",
1335 rela_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1336 rela_hdr
->sh_entsize
= (use_rela_p
1337 ? sizeof (Elf_External_Rela
)
1338 : sizeof (Elf_External_Rel
));
1340 rela_hdr
->sh_flags
= 0;
1341 rela_hdr
->sh_addr
= 0;
1342 rela_hdr
->sh_size
= 0;
1343 rela_hdr
->sh_offset
= 0;
1345 /* FIXME: Systems I've checked use an alignment of 4, but some
1346 systems may use a different alignment. */
1347 rela_hdr
->sh_addralign
= 4;
1352 if (asect
->flags
& SEC_ALLOC
)
1354 this_hdr
->sh_flags
|= SHF_ALLOC
;
1355 if (asect
->flags
& SEC_LOAD
)
1357 /* @@ Do something with sh_type? */
1360 if (!(asect
->flags
& SEC_READONLY
))
1361 this_hdr
->sh_flags
|= SHF_WRITE
;
1362 if (asect
->flags
& SEC_CODE
)
1363 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1366 /* Map symbol from it's internal number to the external number, moving
1367 all local symbols to be at the head of the list. */
1370 sym_is_global (abfd
, sym
)
1374 /* If the backend has a special mapping, use it. */
1375 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
1376 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
1379 if (sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
))
1381 if (sym
->flags
& BSF_LOCAL
)
1385 if (sym
->section
== 0)
1387 /* Is this valid? */
1392 if (sym
->section
== &bfd_und_section
)
1394 if (bfd_is_com_section (sym
->section
))
1396 if (sym
->flags
& (BSF_LOCAL
| BSF_SECTION_SYM
| BSF_FILE
))
1402 DEFUN (elf_map_symbols
, (abfd
), bfd
* abfd
)
1404 int symcount
= bfd_get_symcount (abfd
);
1405 asymbol
**syms
= bfd_get_outsymbols (abfd
);
1406 asymbol
**sect_syms
;
1408 int num_globals
= 0;
1409 int num_locals2
= 0;
1410 int num_globals2
= 0;
1412 int num_sections
= 0;
1413 Elf_Sym_Extra
*sym_extra
;
1418 fprintf (stderr
, "elf_map_symbols\n");
1422 /* Add local symbols for each section for which there are relocs.
1423 FIXME: How can we tell which sections have relocs at this point?
1424 Will reloc_count always be accurate? Actually, I think most ELF
1425 targets create section symbols for all sections anyhow. */
1426 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1428 if (max_index
< asect
->index
)
1429 max_index
= asect
->index
;
1433 elf_num_section_syms (abfd
) = max_index
;
1434 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
1435 elf_section_syms (abfd
) = sect_syms
;
1439 bfd_set_error (bfd_error_no_memory
);
1443 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1445 asymbol
*sym
= bfd_make_empty_symbol (abfd
);
1448 bfd_set_error (bfd_error_no_memory
);
1451 sym
->the_bfd
= abfd
;
1452 sym
->name
= asect
->name
;
1453 sym
->value
= asect
->vma
;
1454 sym
->flags
= BSF_SECTION_SYM
;
1455 sym
->section
= asect
;
1456 sect_syms
[asect
->index
] = sym
;
1460 "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
1461 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
1468 syms
= (asymbol
**) bfd_realloc (abfd
, syms
,
1469 ((symcount
+ num_sections
+ 1)
1470 * sizeof (asymbol
*)));
1472 syms
= (asymbol
**) bfd_alloc (abfd
,
1473 (num_sections
+ 1) * sizeof (asymbol
*));
1476 bfd_set_error (bfd_error_no_memory
);
1480 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1482 if (sect_syms
[asect
->index
])
1483 syms
[symcount
++] = sect_syms
[asect
->index
];
1486 syms
[symcount
] = (asymbol
*) 0;
1487 bfd_set_symtab (abfd
, syms
, symcount
);
1490 elf_sym_extra (abfd
) = sym_extra
1491 = (Elf_Sym_Extra
*) bfd_alloc (abfd
, symcount
* sizeof (Elf_Sym_Extra
));
1494 bfd_set_error (bfd_error_no_memory
);
1498 /* Identify and classify all of the symbols. */
1499 for (idx
= 0; idx
< symcount
; idx
++)
1501 if (!sym_is_global (abfd
, syms
[idx
]))
1507 /* Now provide mapping information. Add +1 for skipping over the
1509 for (idx
= 0; idx
< symcount
; idx
++)
1511 syms
[idx
]->udata
= (PTR
) &sym_extra
[idx
];
1512 if (!sym_is_global (abfd
, syms
[idx
]))
1513 sym_extra
[idx
].elf_sym_num
= 1 + num_locals2
++;
1515 sym_extra
[idx
].elf_sym_num
= 1 + num_locals
+ num_globals2
++;
1518 elf_num_locals (abfd
) = num_locals
;
1519 elf_num_globals (abfd
) = num_globals
;
1523 static boolean
assign_section_numbers ();
1524 static boolean
assign_file_positions_except_relocs ();
1527 DEFUN (elf_compute_section_file_positions
, (abfd
), bfd
* abfd
)
1529 bfd_map_over_sections (abfd
, elf_fake_sections
, 0);
1531 if (!assign_section_numbers (abfd
))
1534 bfd_map_over_sections (abfd
, elf_make_sections
, 0);
1536 bfd_map_over_sections (abfd
, fix_up_strtabs
, 0); /* .stab/.stabstr &c */
1538 if (swap_out_syms (abfd
) == false)
1541 if (!assign_file_positions_except_relocs (abfd
))
1548 DEFUN (elf_write_phdrs
, (abfd
, i_ehdrp
, i_phdrp
, phdr_cnt
),
1550 Elf_Internal_Ehdr
* i_ehdrp AND
1551 Elf_Internal_Phdr
* i_phdrp AND
1552 Elf32_Half phdr_cnt
)
1554 /* first program header entry goes after the file header */
1555 int outbase
= i_ehdrp
->e_phoff
;
1557 Elf_External_Phdr x_phdr
;
1559 for (i
= 0; i
< phdr_cnt
; i
++)
1561 elf_swap_phdr_out (abfd
, i_phdrp
+ i
, &x_phdr
);
1562 bfd_seek (abfd
, outbase
, SEEK_SET
);
1563 bfd_write ((PTR
) & x_phdr
, sizeof (x_phdr
), 1, abfd
);
1564 outbase
+= sizeof (x_phdr
);
1570 static const Elf_Internal_Shdr null_shdr
;
1572 /* Assign all ELF section numbers. The dummy first section is handled here
1573 too. The link/info pointers for the standard section types are filled
1574 in here too, while we're at it. (Link pointers for .stab sections are
1575 not filled in here.) */
1577 assign_section_numbers (abfd
)
1580 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1582 int section_number
= 1;
1584 Elf_Internal_Shdr
**i_shdrp
;
1586 t
->shstrtab_hdr
.sh_size
= elf_shstrtab(abfd
)->length
;
1587 t
->shstrtab_hdr
.contents
= (void *) elf_shstrtab(abfd
)->tab
;
1588 shstrtab_length_fixed
= 1;
1590 t
->shstrtab_section
= section_number
++;
1591 elf_elfheader(abfd
)->e_shstrndx
= t
->shstrtab_section
;
1594 t
->symtab_section
= section_number
++;
1595 t
->strtab_section
= section_number
++;
1596 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1598 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1600 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1601 d
->this_idx
= section_number
++;
1602 if (sec
->flags
& SEC_RELOC
)
1604 d
->rel_idx
= section_number
++;
1605 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1606 d
->rel_hdr
.sh_info
= d
->this_idx
;
1610 /* No handling for per-section string tables currently. */
1612 elf_elfheader(abfd
)->e_shnum
= section_number
;
1614 /* Set up the list of section header pointers, in agreement with the
1616 i_shdrp
= (Elf_Internal_Shdr
**)
1617 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*));
1620 bfd_set_error (bfd_error_no_memory
);
1623 elf_elfsections(abfd
) = i_shdrp
;
1624 for (i
= 0; i
< section_number
; i
++)
1627 i_shdrp
[0] = (Elf_Internal_Shdr
*) &null_shdr
;
1628 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1631 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1632 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1634 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1636 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1637 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1639 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1641 /* Make sure we got everything.... */
1642 for (i
= 0; i
< section_number
; i
++)
1643 if (i_shdrp
[i
] == 0)
1648 static INLINE file_ptr
1649 assign_file_position_for_section (i_shdrp
, offset
)
1650 Elf_Internal_Shdr
*i_shdrp
;
1655 if (i_shdrp
->sh_addralign
!= 0)
1656 align
= i_shdrp
->sh_addralign
;
1659 i_shdrp
->sh_offset
= offset
= BFD_ALIGN (offset
, align
);
1660 if (i_shdrp
->rawdata
!= NULL
)
1661 ((asection
*) i_shdrp
->rawdata
)->filepos
= offset
;
1662 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
1663 offset
+= i_shdrp
->sh_size
;
1667 static INLINE file_ptr
1668 align_file_position (off
)
1671 return (off
+ FILE_ALIGN
- 1) & ~(FILE_ALIGN
- 1);
1674 static INLINE file_ptr
1675 assign_file_positions_for_symtab_and_strtabs (abfd
, off
)
1679 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1681 off
= align_file_position (off
);
1682 off
= assign_file_position_for_section (&t
->symtab_hdr
, off
);
1683 off
= assign_file_position_for_section (&t
->shstrtab_hdr
, off
);
1684 off
= assign_file_position_for_section (&t
->strtab_hdr
, off
);
1689 bfd_vma low
, mem_size
;
1693 struct seg_info
*next
;
1697 map_program_segments (abfd
)
1700 Elf_Internal_Shdr
**i_shdrpp
= elf_elfsections (abfd
);
1701 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
1702 Elf_Internal_Shdr
*i_shdrp
;
1703 Elf_Internal_Phdr
*phdr
;
1706 file_ptr lowest_offset
= 0;
1707 struct seg_info
*seg
= NULL
;
1709 done
= (char *) alloca (i_ehdrp
->e_shnum
);
1710 memset (done
, 0, i_ehdrp
->e_shnum
);
1711 for (i
= 1; i
< i_ehdrp
->e_shnum
; i
++)
1713 i_shdrp
= i_shdrpp
[i
];
1714 /* If it's going to be mapped in, it's been assigned a position. */
1715 if (i_shdrp
->sh_offset
+ 1 == 0)
1717 /* Well, not really, but we won't process it here. */
1721 if (i_shdrp
->sh_offset
< lowest_offset
1722 || lowest_offset
== 0)
1723 lowest_offset
= i_shdrp
->sh_offset
;
1724 /* Only interested in PROGBITS or NOBITS for generating segments. */
1725 switch (i_shdrp
->sh_type
)
1738 bfd_vma lowest_vma
= -1, high
;
1742 struct seg_info
*snew
;
1743 struct seg_info
**s_ptr
;
1745 for (i
= 1; i
< i_ehdrp
->e_shnum
; i
++)
1747 i_shdrp
= i_shdrpp
[i
];
1748 if (!done
[i
] && i_shdrp
->sh_addr
< lowest_vma
)
1750 lowest_vma
= i_shdrp
->sh_addr
;
1756 /* So now we know the lowest vma of any unassigned sections; start
1758 snew
= (struct seg_info
*) bfd_alloc (abfd
, sizeof (struct seg_info
));
1761 bfd_set_error (bfd_error_no_memory
);
1765 while (*s_ptr
!= (struct seg_info
*) NULL
)
1766 s_ptr
= &(*s_ptr
)->next
;
1769 snew
->low
= lowest_vma
;
1770 i_shdrp
= i_shdrpp
[low_sec
];
1771 snew
->start_pos
= i_shdrp
->sh_offset
;
1772 snew
->sh_flags
= i_shdrp
->sh_flags
;
1773 done
[low_sec
] = 1, n_left
--;
1774 mem_size
= i_shdrp
->sh_size
;
1775 high
= lowest_vma
+ i_shdrp
->sh_size
;
1777 if (i_shdrp
->sh_type
== SHT_PROGBITS
)
1778 file_size
= i_shdrp
->sh_size
;
1780 for (i
= 1; i
< i_ehdrp
->e_shnum
; i
++)
1786 i_shdrp
= i_shdrpp
[i
];
1787 /* position of next byte on disk */
1788 f1
= snew
->start_pos
+ file_size
;
1789 if (i_shdrp
->sh_type
== SHT_PROGBITS
)
1791 if (i_shdrp
->sh_offset
- f1
!= i_shdrp
->sh_addr
- high
)
1793 if (file_size
!= mem_size
)
1796 else /* sh_type == NOBITS */
1798 /* If the section in question has no contents in the disk
1799 file, we really don't care where it supposedly starts.
1800 But we don't want to bother merging it into this segment
1801 if it doesn't start on this memory page. */
1802 bfd_vma page1
, page2
;
1803 bfd_vma maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
1805 /* page number in address space of current end of snew */
1806 page1
= (high
- 1 + maxpagesize
- 1) / maxpagesize
;
1807 /* page number in address space of start of this section */
1808 page2
= (i_shdrp
->sh_addr
+ maxpagesize
- 1) / maxpagesize
;
1813 done
[i
] = 1, n_left
--;
1814 if (i_shdrp
->sh_type
== SHT_PROGBITS
)
1815 file_size
= i_shdrp
->sh_offset
+ i_shdrp
->sh_size
- snew
->start_pos
;
1816 mem_size
= i_shdrp
->sh_addr
+ i_shdrp
->sh_size
- snew
->low
;
1817 high
= i_shdrp
->sh_addr
+ i_shdrp
->sh_size
;
1820 snew
->file_size
= file_size
;
1821 snew
->mem_size
= mem_size
;
1823 /* Now do something with the list of segments we've built up. */
1825 bfd_vma maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
1830 for (s
= seg
; s
; s
= s
->next
)
1834 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
1835 sz
= sizeof (Elf_External_Phdr
) * n_segs
;
1836 if (align_file_position (i_ehdrp
->e_ehsize
) + sz
<= lowest_offset
)
1837 i_ehdrp
->e_phoff
= align_file_position (i_ehdrp
->e_ehsize
);
1840 i_ehdrp
->e_phoff
= align_file_position (elf_tdata (abfd
)->next_file_pos
);
1841 elf_tdata (abfd
)->next_file_pos
= i_ehdrp
->e_phoff
+ sz
;
1843 phdr
= (Elf_Internal_Phdr
*) bfd_alloc (abfd
,
1844 n_segs
* sizeof (Elf_Internal_Phdr
));
1847 bfd_set_error (bfd_error_no_memory
);
1848 abort(); /* FIXME */
1850 elf_tdata (abfd
)->phdr
= phdr
;
1853 phdr
->p_type
= PT_LOAD
; /* only type we really support so far */
1854 phdr
->p_offset
= seg
->start_pos
;
1855 phdr
->p_vaddr
= seg
->low
;
1857 phdr
->p_filesz
= seg
->file_size
;
1858 phdr
->p_memsz
= seg
->mem_size
;
1859 phdr
->p_flags
= PF_R
;
1860 phdr
->p_align
= maxpagesize
; /* ? */
1861 if (seg
->sh_flags
& SHF_WRITE
)
1862 /* SysVr4 ELF docs say "data segments normally have read, write,
1863 and execute permissions." */
1864 phdr
->p_flags
|= (PF_W
| PF_X
);
1865 if (seg
->sh_flags
& SHF_EXECINSTR
)
1866 phdr
->p_flags
|= PF_X
;
1870 i_ehdrp
->e_phnum
= n_segs
;
1872 elf_write_phdrs (abfd
, i_ehdrp
, elf_tdata (abfd
)->phdr
, i_ehdrp
->e_phnum
);
1877 assign_file_positions_except_relocs (abfd
)
1880 /* For now, we ignore the possibility of having program segments, which
1881 may require some alignment in the file. That'll require padding, and
1882 some interesting calculations to optimize file space usage.
1884 Also, since the application may change the list of relocations for
1885 a given section, we don't figure them in here. We'll put them at the
1886 end of the file, at positions computed during bfd_close.
1888 The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ...
1889 or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */
1891 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1894 Elf_Internal_Shdr
**i_shdrpp
= elf_elfsections (abfd
);
1895 Elf_Internal_Shdr
*i_shdrp
;
1896 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
1897 int exec_p
= (abfd
->flags
& EXEC_P
) != 0;
1898 bfd_vma maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
1900 /* Everything starts after the ELF file header. */
1901 off
= i_ehdrp
->e_ehsize
;
1905 /* Section headers. */
1906 off
= align_file_position (off
);
1907 i_ehdrp
->e_shoff
= off
;
1908 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
1909 off
= assign_file_positions_for_symtab_and_strtabs (abfd
, off
);
1911 for (i
= 1; i
< i_ehdrp
->e_shnum
; i
++)
1913 /* The symtab and strtab sections are placed by
1914 assign_file_positions_for_symtab_and_strtabs. */
1915 if (i
== t
->symtab_section
1916 || i
== t
->strtab_section
1917 || i
== t
->shstrtab_section
)
1920 i_shdrp
= i_shdrpp
[i
];
1921 if (i_shdrp
->sh_type
== SHT_REL
|| i_shdrp
->sh_type
== SHT_RELA
)
1923 i_shdrp
->sh_offset
= -1;
1928 if (maxpagesize
== 0)
1929 maxpagesize
= 1; /* make the arithmetic work */
1930 /* This isn't necessarily going to give the best packing, if the
1931 segments require padding between them, but since that isn't
1932 usually the case, this'll do. */
1933 if ((i_shdrp
->sh_flags
& SHF_ALLOC
) == 0)
1935 i_shdrp
->sh_offset
= -1;
1938 /* Blindly assume that the segments are ordered optimally. With
1939 the default LD script, they will be. */
1940 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
1942 /* need big unsigned type */
1944 addtl_off
= i_shdrp
->sh_addr
- off
;
1945 addtl_off
= addtl_off
% maxpagesize
;
1952 off
= assign_file_position_for_section (i_shdrp
, off
);
1955 && i_shdrp
->sh_type
== SHT_NOBITS
1956 && (i
== i_ehdrp
->e_shnum
1957 || i_shdrpp
[i
+ 1]->sh_type
!= SHT_NOBITS
))
1959 /* Skip to the next page to ensure that when the file is
1960 loaded the bss section is loaded with zeroes. I don't
1961 know if this is required on all platforms, but it
1962 shouldn't really hurt. */
1963 off
= BFD_ALIGN (off
, maxpagesize
);
1967 && get_elf_backend_data(abfd
)->maxpagesize
> 1
1968 && i_shdrp
->sh_type
== SHT_PROGBITS
1969 && (i_shdrp
->sh_flags
& SHF_ALLOC
)
1970 && (i_shdrp
->sh_offset
- i_shdrp
->sh_addr
) % get_elf_backend_data (abfd
)->maxpagesize
!= 0)
1975 elf_tdata (abfd
)->next_file_pos
= off
;
1976 if (!map_program_segments (abfd
))
1978 off
= elf_tdata (abfd
)->next_file_pos
;
1980 /* Section headers. */
1981 off
= align_file_position (off
);
1982 i_ehdrp
->e_shoff
= off
;
1983 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
1985 off
= assign_file_positions_for_symtab_and_strtabs (abfd
, off
);
1987 for (i
= 1; i
< i_ehdrp
->e_shnum
; i
++)
1989 i_shdrp
= i_shdrpp
[i
];
1990 if (i_shdrp
->sh_offset
+ 1 == 0
1991 && i_shdrp
->sh_type
!= SHT_REL
1992 && i_shdrp
->sh_type
!= SHT_RELA
)
1993 off
= assign_file_position_for_section (i_shdrp
, off
);
1996 elf_tdata (abfd
)->next_file_pos
= off
;
2004 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
2005 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
2006 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
2008 struct strtab
*shstrtab
;
2010 i_ehdrp
= elf_elfheader (abfd
);
2011 i_shdrp
= elf_elfsections (abfd
);
2013 shstrtab
= bfd_new_strtab (abfd
);
2017 elf_shstrtab (abfd
) = shstrtab
;
2019 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
2020 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
2021 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
2022 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
2024 i_ehdrp
->e_ident
[EI_CLASS
] = ELFCLASS
;
2025 i_ehdrp
->e_ident
[EI_DATA
] =
2026 abfd
->xvec
->byteorder_big_p
? ELFDATA2MSB
: ELFDATA2LSB
;
2027 i_ehdrp
->e_ident
[EI_VERSION
] = EV_CURRENT
;
2029 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
2030 i_ehdrp
->e_ident
[count
] = 0;
2032 i_ehdrp
->e_type
= (abfd
->flags
& EXEC_P
) ? ET_EXEC
: ET_REL
;
2033 switch (bfd_get_arch (abfd
))
2035 case bfd_arch_unknown
:
2036 i_ehdrp
->e_machine
= EM_NONE
;
2038 case bfd_arch_sparc
:
2039 i_ehdrp
->e_machine
= EM_SPARC
;
2040 /* start-sanitize-v9 */
2042 i_ehdrp
->e_machine
= EM_SPARC64
;
2044 /* end-sanitize-v9 */
2047 i_ehdrp
->e_machine
= EM_386
;
2050 i_ehdrp
->e_machine
= EM_68K
;
2053 i_ehdrp
->e_machine
= EM_88K
;
2056 i_ehdrp
->e_machine
= EM_860
;
2058 case bfd_arch_mips
: /* MIPS Rxxxx */
2059 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
2062 i_ehdrp
->e_machine
= EM_HPPA
;
2064 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
2066 i_ehdrp
->e_machine
= EM_NONE
;
2068 i_ehdrp
->e_version
= EV_CURRENT
;
2069 i_ehdrp
->e_ehsize
= sizeof (Elf_External_Ehdr
);
2071 /* no program header, for now. */
2072 i_ehdrp
->e_phoff
= 0;
2073 i_ehdrp
->e_phentsize
= 0;
2074 i_ehdrp
->e_phnum
= 0;
2076 /* each bfd section is section header entry */
2077 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
2078 i_ehdrp
->e_shentsize
= sizeof (Elf_External_Shdr
);
2080 /* if we're building an executable, we'll need a program header table */
2081 if (abfd
->flags
& EXEC_P
)
2083 /* it all happens later */
2085 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
2087 /* elf_build_phdrs() returns a (NULL-terminated) array of
2088 Elf_Internal_Phdrs */
2089 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
2090 i_ehdrp
->e_phoff
= outbase
;
2091 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
2096 i_ehdrp
->e_phentsize
= 0;
2098 i_ehdrp
->e_phoff
= 0;
2101 elf_tdata (abfd
)->symtab_hdr
.sh_name
= bfd_add_to_strtab (abfd
, shstrtab
,
2103 elf_tdata (abfd
)->strtab_hdr
.sh_name
= bfd_add_to_strtab (abfd
, shstrtab
,
2105 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
= bfd_add_to_strtab (abfd
, shstrtab
,
2111 swap_out_syms (abfd
)
2114 if (!elf_map_symbols (abfd
))
2117 /* Dump out the symtabs. */
2119 int symcount
= bfd_get_symcount (abfd
);
2120 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2121 struct strtab
*stt
= bfd_new_strtab (abfd
);
2122 Elf_Internal_Shdr
*symtab_hdr
;
2123 Elf_Internal_Shdr
*symstrtab_hdr
;
2124 Elf_External_Sym
*outbound_syms
;
2129 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2130 symtab_hdr
->sh_type
= SHT_SYMTAB
;
2131 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
2132 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
2133 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
2135 /* FIXME: Systems I've checked use 4 byte alignment for .symtab,
2136 but it is possible that there are systems which use a different
2138 symtab_hdr
->sh_addralign
= 4;
2140 /* see assert in elf_fake_sections that supports this: */
2141 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2142 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
2144 outbound_syms
= (Elf_External_Sym
*)
2145 bfd_alloc (abfd
, (1 + symcount
) * sizeof (Elf_External_Sym
));
2148 bfd_set_error (bfd_error_no_memory
);
2151 /* now generate the data (for "contents") */
2153 /* Fill in zeroth symbol and swap it out. */
2154 Elf_Internal_Sym sym
;
2160 sym
.st_shndx
= SHN_UNDEF
;
2161 elf_swap_symbol_out (abfd
, &sym
, outbound_syms
);
2163 for (idx
= 0; idx
< symcount
; idx
++)
2165 Elf_Internal_Sym sym
;
2166 bfd_vma value
= syms
[idx
]->value
;
2168 if (syms
[idx
]->flags
& BSF_SECTION_SYM
)
2169 /* Section symbols have no names. */
2172 sym
.st_name
= bfd_add_to_strtab (abfd
, stt
, syms
[idx
]->name
);
2174 if (bfd_is_com_section (syms
[idx
]->section
))
2176 /* ELF common symbols put the alignment into the `value' field,
2177 and the size into the `size' field. This is backwards from
2178 how BFD handles it, so reverse it here. */
2179 sym
.st_size
= value
;
2180 /* Should retrieve this from somewhere... */
2182 sym
.st_shndx
= elf_section_from_bfd_section (abfd
,
2183 syms
[idx
]->section
);
2187 asection
*sec
= syms
[idx
]->section
;
2188 elf_symbol_type
*type_ptr
;
2191 if (sec
->output_section
)
2193 value
+= sec
->output_offset
;
2194 sec
= sec
->output_section
;
2197 sym
.st_value
= value
;
2198 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
2199 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
2200 sym
.st_shndx
= shndx
= elf_section_from_bfd_section (abfd
, sec
);
2204 /* Writing this would be a hell of a lot easier if we had
2205 some decent documentation on bfd, and knew what to expect
2206 of the library, and what to demand of applications. For
2207 example, it appears that `objcopy' might not set the
2208 section of a symbol to be a section that is actually in
2210 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
2212 sym
.st_shndx
= shndx
= elf_section_from_bfd_section (abfd
, sec2
);
2213 assert (shndx
!= -1);
2217 if (bfd_is_com_section (syms
[idx
]->section
))
2218 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_OBJECT
);
2219 else if (syms
[idx
]->section
== &bfd_und_section
)
2220 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_NOTYPE
);
2221 else if (syms
[idx
]->flags
& BSF_SECTION_SYM
)
2222 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
2223 else if (syms
[idx
]->flags
& BSF_FILE
)
2224 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
2227 int bind
= STB_LOCAL
;
2228 int type
= STT_OBJECT
;
2229 unsigned int flags
= syms
[idx
]->flags
;
2231 if (flags
& BSF_LOCAL
)
2233 else if (flags
& BSF_WEAK
)
2235 else if (flags
& BSF_GLOBAL
)
2238 if (flags
& BSF_FUNCTION
)
2241 sym
.st_info
= ELF_ST_INFO (bind
, type
);
2245 elf_swap_symbol_out (abfd
, &sym
,
2247 + elf_sym_extra (abfd
)[idx
].elf_sym_num
));
2250 symtab_hdr
->contents
= (PTR
) outbound_syms
;
2251 symstrtab_hdr
->contents
= (PTR
) stt
->tab
;
2252 symstrtab_hdr
->sh_size
= stt
->length
;
2253 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
2255 symstrtab_hdr
->sh_flags
= 0;
2256 symstrtab_hdr
->sh_addr
= 0;
2257 symstrtab_hdr
->sh_entsize
= 0;
2258 symstrtab_hdr
->sh_link
= 0;
2259 symstrtab_hdr
->sh_info
= 0;
2260 symstrtab_hdr
->sh_addralign
= 1;
2261 symstrtab_hdr
->size
= 0;
2264 /* put the strtab out too... */
2266 Elf_Internal_Shdr
*this_hdr
;
2268 this_hdr
= &elf_tdata(abfd
)->shstrtab_hdr
;
2269 this_hdr
->contents
= (PTR
) elf_shstrtab (abfd
)->tab
;
2270 this_hdr
->sh_size
= elf_shstrtab (abfd
)->length
;
2271 this_hdr
->sh_type
= SHT_STRTAB
;
2272 this_hdr
->sh_flags
= 0;
2273 this_hdr
->sh_addr
= 0;
2274 this_hdr
->sh_entsize
= 0;
2275 this_hdr
->sh_addralign
= 1;
2282 write_shdrs_and_ehdr (abfd
)
2285 Elf_External_Ehdr x_ehdr
; /* Elf file header, external form */
2286 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
2287 Elf_External_Shdr
*x_shdrp
; /* Section header table, external form */
2288 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
2290 struct strtab
*shstrtab
;
2292 i_ehdrp
= elf_elfheader (abfd
);
2293 i_shdrp
= elf_elfsections (abfd
);
2294 shstrtab
= elf_shstrtab (abfd
);
2296 /* swap the header before spitting it out... */
2299 elf_debug_file (i_ehdrp
);
2301 elf_swap_ehdr_out (abfd
, i_ehdrp
, &x_ehdr
);
2302 bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
);
2303 bfd_write ((PTR
) & x_ehdr
, sizeof (x_ehdr
), 1, abfd
);
2305 /* at this point we've concocted all the ELF sections... */
2306 x_shdrp
= (Elf_External_Shdr
*)
2307 bfd_alloc (abfd
, sizeof (*x_shdrp
) * (i_ehdrp
->e_shnum
));
2310 bfd_set_error (bfd_error_no_memory
);
2314 for (count
= 0; count
< i_ehdrp
->e_shnum
; count
++)
2317 elf_debug_section (shstrtab
->tab
+ i_shdrp
[count
]->sh_name
, count
,
2320 elf_swap_shdr_out (abfd
, i_shdrp
[count
], x_shdrp
+ count
);
2322 bfd_seek (abfd
, (file_ptr
) i_ehdrp
->e_shoff
, SEEK_SET
);
2323 bfd_write ((PTR
) x_shdrp
, sizeof (*x_shdrp
), i_ehdrp
->e_shnum
, abfd
);
2324 /* need to dump the string table too... */
2330 assign_file_positions_for_relocs (abfd
)
2333 file_ptr off
= elf_tdata(abfd
)->next_file_pos
;
2335 Elf_Internal_Shdr
**shdrpp
= elf_elfsections (abfd
);
2336 Elf_Internal_Shdr
*shdrp
;
2337 for (i
= 1; i
< elf_elfheader(abfd
)->e_shnum
; i
++)
2340 if (shdrp
->sh_type
!= SHT_REL
&& shdrp
->sh_type
!= SHT_RELA
)
2342 off
= align_file_position (off
);
2343 off
= assign_file_position_for_section (shdrp
, off
);
2345 elf_tdata(abfd
)->next_file_pos
= off
;
2349 DEFUN (NAME(bfd_elf
,write_object_contents
), (abfd
), bfd
* abfd
)
2351 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2352 Elf_Internal_Ehdr
*i_ehdrp
;
2353 Elf_Internal_Shdr
**i_shdrp
;
2356 /* We don't know how to write dynamic objects. Specifically, we
2357 don't know how to construct the program header. */
2358 if ((abfd
->flags
& DYNAMIC
) != 0)
2360 fprintf (stderr
, "Writing ELF dynamic objects is not supported\n");
2361 bfd_set_error (bfd_error_wrong_format
);
2365 if (abfd
->output_has_begun
== false)
2367 if (prep_headers (abfd
) == false)
2369 if (elf_compute_section_file_positions (abfd
) == false)
2371 abfd
->output_has_begun
= true;
2374 i_shdrp
= elf_elfsections (abfd
);
2375 i_ehdrp
= elf_elfheader (abfd
);
2377 bfd_map_over_sections (abfd
, write_relocs
, (PTR
) 0);
2378 assign_file_positions_for_relocs (abfd
);
2380 /* After writing the headers, we need to write the sections too... */
2381 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
2383 if (bed
->elf_backend_section_processing
)
2384 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
2385 if (i_shdrp
[count
]->contents
)
2387 bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
);
2388 bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
, 1,
2393 if (bed
->elf_backend_final_write_processing
)
2394 (*bed
->elf_backend_final_write_processing
) (abfd
);
2396 return write_shdrs_and_ehdr (abfd
);
2399 /* Given an index of a section, retrieve a pointer to it. Note
2400 that for our purposes, sections are indexed by {1, 2, ...} with
2401 0 being an illegal index. */
2403 /* In the original, each ELF section went into exactly one BFD
2404 section. This doesn't really make sense, so we need a real mapping.
2405 The mapping has to hide in the Elf_Internal_Shdr since asection
2406 doesn't have anything like a tdata field... */
2409 DEFUN (section_from_elf_index
, (abfd
, index
),
2413 /* @@ Is bfd_com_section really correct in all the places it could
2414 be returned from this routine? */
2416 if (index
== SHN_ABS
)
2417 return &bfd_com_section
; /* not abs? */
2418 if (index
== SHN_COMMON
)
2419 return &bfd_com_section
;
2421 if (index
> elf_elfheader (abfd
)->e_shnum
)
2425 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[index
];
2427 switch (hdr
->sh_type
)
2429 /* ELF sections that map to BFD sections */
2433 bfd_section_from_shdr (abfd
, index
);
2434 return (struct sec
*) hdr
->rawdata
;
2437 return (struct sec
*) &bfd_abs_section
;
2442 /* given a section, search the header to find them... */
2444 DEFUN (elf_section_from_bfd_section
, (abfd
, asect
),
2448 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
2450 Elf_Internal_Shdr
*hdr
;
2451 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
2453 if (asect
== &bfd_abs_section
)
2455 if (asect
== &bfd_com_section
)
2457 if (asect
== &bfd_und_section
)
2460 for (index
= 0; index
< maxindex
; index
++)
2462 hdr
= i_shdrp
[index
];
2463 switch (hdr
->sh_type
)
2465 /* ELF sections that map to BFD sections */
2471 if (((struct sec
*) (hdr
->rawdata
)) == asect
)
2477 /* fix_up_strtabs will generate STRTAB sections with names
2479 if (!strncmp (asect
->name
, ".stab", 5)
2480 && !strcmp ("str", asect
->name
+ strlen (asect
->name
) - 3))
2484 if (((struct sec
*) (hdr
->rawdata
)) == asect
)
2492 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2494 if (bed
->elf_backend_section_from_bfd_section
)
2499 if ((*bed
->elf_backend_section_from_bfd_section
)
2500 (abfd
, hdr
, asect
, &retval
))
2510 /* given a symbol, return the bfd index for that symbol. */
2512 DEFUN (elf_symbol_from_bfd_symbol
, (abfd
, asym_ptr_ptr
),
2514 struct symbol_cache_entry
**asym_ptr_ptr
)
2516 struct symbol_cache_entry
*asym_ptr
= *asym_ptr_ptr
;
2518 flagword flags
= asym_ptr
->flags
;
2520 /* When gas creates relocations against local labels, it creates its
2521 own symbol for the section, but does put the symbol into the
2522 symbol chain, so udata is 0. When the linker is generating
2523 relocatable output, this section symbol may be for one of the
2524 input sections rather than the output section. */
2525 if (asym_ptr
->udata
== (PTR
) 0
2526 && (flags
& BSF_SECTION_SYM
)
2527 && asym_ptr
->section
)
2531 if (asym_ptr
->section
->output_section
!= NULL
)
2532 indx
= asym_ptr
->section
->output_section
->index
;
2534 indx
= asym_ptr
->section
->index
;
2535 if (elf_section_syms (abfd
)[indx
])
2536 asym_ptr
->udata
= elf_section_syms (abfd
)[indx
]->udata
;
2539 if (asym_ptr
->udata
)
2540 idx
= ((Elf_Sym_Extra
*)asym_ptr
->udata
)->elf_sym_num
;
2550 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n",
2551 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
, elf_symbol_flags (flags
));
2560 DEFUN (elf_slurp_symbol_table
, (abfd
, symptrs
),
2562 asymbol
** symptrs
) /* Buffer for generated bfd symbols */
2564 Elf_Internal_Shdr
*hdr
= &elf_tdata(abfd
)->symtab_hdr
;
2565 long symcount
; /* Number of external ELF symbols */
2566 elf_symbol_type
*sym
; /* Pointer to current bfd symbol */
2567 elf_symbol_type
*symbase
; /* Buffer for generated bfd symbols */
2568 Elf_Internal_Sym i_sym
;
2569 Elf_External_Sym
*x_symp
;
2571 /* this is only valid because there is only one symtab... */
2572 /* FIXME: This is incorrect, there may also be a dynamic symbol
2573 table which is a subset of the full symbol table. We either need
2574 to be prepared to read both (and merge them) or ensure that we
2575 only read the full symbol table. Currently we only get called to
2576 read the full symbol table. -fnf */
2578 /* Read each raw ELF symbol, converting from external ELF form to
2579 internal ELF form, and then using the information to create a
2580 canonical bfd symbol table entry.
2582 Note that we allocate the initial bfd canonical symbol buffer
2583 based on a one-to-one mapping of the ELF symbols to canonical
2584 symbols. We actually use all the ELF symbols, so there will be no
2585 space left over at the end. When we have all the symbols, we
2586 build the caller's pointer vector. */
2588 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) == -1)
2590 bfd_set_error (bfd_error_system_call
);
2594 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
2597 sym
= symbase
= NULL
;
2602 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) == -1)
2604 bfd_set_error (bfd_error_system_call
);
2608 symbase
= ((elf_symbol_type
*)
2609 bfd_zalloc (abfd
, symcount
* sizeof (elf_symbol_type
)));
2610 if (symbase
== (elf_symbol_type
*) NULL
)
2612 bfd_set_error (bfd_error_no_memory
);
2617 /* Temporarily allocate room for the raw ELF symbols. */
2618 x_symp
= ((Elf_External_Sym
*)
2619 alloca (symcount
* sizeof (Elf_External_Sym
)));
2621 if (bfd_read ((PTR
) x_symp
, sizeof (Elf_External_Sym
), symcount
, abfd
)
2622 != symcount
* sizeof (Elf_External_Sym
))
2624 bfd_error
= system_call_error
;
2627 /* Skip first symbol, which is a null dummy. */
2628 for (i
= 1; i
< symcount
; i
++)
2630 elf_swap_symbol_in (abfd
, x_symp
+ i
, &i_sym
);
2631 memcpy (&sym
->internal_elf_sym
, &i_sym
, sizeof (Elf_Internal_Sym
));
2632 #ifdef ELF_KEEP_EXTSYM
2633 memcpy (&sym
->native_elf_sym
, x_symp
+ i
, sizeof (Elf_External_Sym
));
2635 sym
->symbol
.the_bfd
= abfd
;
2637 sym
->symbol
.name
= elf_string_from_elf_section (abfd
, hdr
->sh_link
,
2640 sym
->symbol
.value
= i_sym
.st_value
;
2642 if (i_sym
.st_shndx
> 0 && i_sym
.st_shndx
< SHN_LORESERV
)
2644 sym
->symbol
.section
= section_from_elf_index (abfd
,
2647 else if (i_sym
.st_shndx
== SHN_ABS
)
2649 sym
->symbol
.section
= &bfd_abs_section
;
2651 else if (i_sym
.st_shndx
== SHN_COMMON
)
2653 sym
->symbol
.section
= &bfd_com_section
;
2654 /* Elf puts the alignment into the `value' field, and
2655 the size into the `size' field. BFD wants to see the
2656 size in the value field, and doesn't care (at the
2657 moment) about the alignment. */
2658 sym
->symbol
.value
= i_sym
.st_size
;
2660 else if (i_sym
.st_shndx
== SHN_UNDEF
)
2662 sym
->symbol
.section
= &bfd_und_section
;
2665 sym
->symbol
.section
= &bfd_abs_section
;
2667 sym
->symbol
.value
-= sym
->symbol
.section
->vma
;
2669 switch (ELF_ST_BIND (i_sym
.st_info
))
2672 sym
->symbol
.flags
|= BSF_LOCAL
;
2675 sym
->symbol
.flags
|= BSF_GLOBAL
;
2678 sym
->symbol
.flags
|= BSF_WEAK
;
2682 switch (ELF_ST_TYPE (i_sym
.st_info
))
2685 sym
->symbol
.flags
|= BSF_SECTION_SYM
| BSF_DEBUGGING
;
2688 sym
->symbol
.flags
|= BSF_FILE
| BSF_DEBUGGING
;
2691 sym
->symbol
.flags
|= BSF_FUNCTION
;
2695 /* Do some backend-specific processing on this symbol. */
2697 struct elf_backend_data
*ebd
= get_elf_backend_data (abfd
);
2698 if (ebd
->elf_backend_symbol_processing
)
2699 (*ebd
->elf_backend_symbol_processing
) (abfd
, &sym
->symbol
);
2706 /* Do some backend-specific processing on this symbol table. */
2708 struct elf_backend_data
*ebd
= get_elf_backend_data (abfd
);
2709 if (ebd
->elf_backend_symbol_table_processing
)
2710 (*ebd
->elf_backend_symbol_table_processing
) (abfd
, symbase
, symcount
);
2713 /* We rely on the zalloc to clear out the final symbol entry. */
2715 bfd_get_symcount (abfd
) = symcount
= sym
- symbase
;
2717 /* Fill in the user's symbol pointer vector if needed. */
2721 while (symcount
-- > 0)
2723 *symptrs
++ = &sym
->symbol
;
2726 *symptrs
= 0; /* Final null pointer */
2732 /* Return the number of bytes required to hold the symtab vector.
2734 Note that we base it on the count plus 1, since we will null terminate
2735 the vector allocated based on this size. However, the ELF symbol table
2736 always has a dummy entry as symbol #0, so it ends up even. */
2739 DEFUN (elf_get_symtab_upper_bound
, (abfd
), bfd
* abfd
)
2741 unsigned int symcount
;
2742 unsigned int symtab_size
= 0;
2744 Elf_Internal_Shdr
*hdr
= &elf_tdata(abfd
)->symtab_hdr
;
2745 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
2746 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
));
2752 This function return the number of bytes required to store the
2753 relocation information associated with section <<sect>>
2754 attached to bfd <<abfd>>
2758 elf_get_reloc_upper_bound (abfd
, asect
)
2762 if (asect
->flags
& SEC_RELOC
)
2764 /* either rel or rela */
2765 return elf_section_data(asect
)->rel_hdr
.sh_size
;
2772 DEFUN (elf_slurp_reloca_table
, (abfd
, asect
, symbols
),
2777 Elf_External_Rela
*native_relocs
;
2778 arelent
*reloc_cache
;
2783 if (asect
->relocation
)
2785 if (asect
->reloc_count
== 0)
2787 if (asect
->flags
& SEC_CONSTRUCTOR
)
2790 bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
);
2791 native_relocs
= (Elf_External_Rela
*)
2792 bfd_alloc (abfd
, asect
->reloc_count
* sizeof (Elf_External_Rela
));
2796 bfd_set_error (bfd_error_no_memory
);
2799 bfd_read ((PTR
) native_relocs
,
2800 sizeof (Elf_External_Rela
), asect
->reloc_count
, abfd
);
2802 reloc_cache
= (arelent
*)
2803 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2807 bfd_set_error (bfd_error_no_memory
);
2811 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2813 Elf_Internal_Rela dst
;
2814 Elf_External_Rela
*src
;
2816 cache_ptr
= reloc_cache
+ idx
;
2817 src
= native_relocs
+ idx
;
2818 elf_swap_reloca_in (abfd
, src
, &dst
);
2820 #ifdef RELOC_PROCESSING
2821 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2823 if (asect
->flags
& SEC_RELOC
)
2825 /* relocatable, so the offset is off of the section */
2826 cache_ptr
->address
= dst
.r_offset
+ asect
->vma
;
2830 /* non-relocatable, so the offset a virtual address */
2831 cache_ptr
->address
= dst
.r_offset
;
2834 /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset
2835 of zero points to the dummy symbol, which was not read into
2836 the symbol table SYMBOLS. */
2837 if (ELF_R_SYM (dst
.r_info
) == 0)
2838 cache_ptr
->sym_ptr_ptr
= bfd_abs_section
.symbol_ptr_ptr
;
2843 cache_ptr
->sym_ptr_ptr
= symbols
+ ELF_R_SYM (dst
.r_info
) - 1;
2845 /* Translate any ELF section symbol into a BFD section
2847 s
= *(cache_ptr
->sym_ptr_ptr
);
2848 if (s
->flags
& BSF_SECTION_SYM
)
2850 cache_ptr
->sym_ptr_ptr
= s
->section
->symbol_ptr_ptr
;
2851 s
= *cache_ptr
->sym_ptr_ptr
;
2852 if (s
->name
== 0 || s
->name
[0] == 0)
2856 cache_ptr
->addend
= dst
.r_addend
;
2858 /* Fill in the cache_ptr->howto field from dst.r_type */
2860 struct elf_backend_data
*ebd
= get_elf_backend_data (abfd
);
2861 (*ebd
->elf_info_to_howto
) (abfd
, cache_ptr
, &dst
);
2866 asect
->relocation
= reloc_cache
;
2872 elf_debug_section (str
, num
, hdr
)
2875 Elf_Internal_Shdr
*hdr
;
2877 fprintf (stderr
, "\nSection#%d '%s' 0x%.8lx\n", num
, str
, (long) hdr
);
2879 "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
2880 (long) hdr
->sh_name
,
2881 (long) hdr
->sh_type
,
2882 (long) hdr
->sh_flags
);
2884 "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
2885 (long) hdr
->sh_addr
,
2886 (long) hdr
->sh_offset
,
2887 (long) hdr
->sh_size
);
2889 "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
2890 (long) hdr
->sh_link
,
2891 (long) hdr
->sh_info
,
2892 (long) hdr
->sh_addralign
);
2893 fprintf (stderr
, "sh_entsize = %ld\n",
2894 (long) hdr
->sh_entsize
);
2895 fprintf (stderr
, "rawdata = 0x%.8lx\n", (long) hdr
->rawdata
);
2896 fprintf (stderr
, "contents = 0x%.8lx\n", (long) hdr
->contents
);
2897 fprintf (stderr
, "size = %ld\n", (long) hdr
->size
);
2902 elf_debug_file (ehdrp
)
2903 Elf_Internal_Ehdr
*ehdrp
;
2905 fprintf (stderr
, "e_entry = 0x%.8lx\n", (long) ehdrp
->e_entry
);
2906 fprintf (stderr
, "e_phoff = %ld\n", (long) ehdrp
->e_phoff
);
2907 fprintf (stderr
, "e_phnum = %ld\n", (long) ehdrp
->e_phnum
);
2908 fprintf (stderr
, "e_phentsize = %ld\n", (long) ehdrp
->e_phentsize
);
2909 fprintf (stderr
, "e_shoff = %ld\n", (long) ehdrp
->e_shoff
);
2910 fprintf (stderr
, "e_shnum = %ld\n", (long) ehdrp
->e_shnum
);
2911 fprintf (stderr
, "e_shentsize = %ld\n", (long) ehdrp
->e_shentsize
);
2916 DEFUN (elf_slurp_reloc_table
, (abfd
, asect
, symbols
),
2921 Elf_External_Rel
*native_relocs
;
2922 arelent
*reloc_cache
;
2924 Elf_Internal_Shdr
*data_hdr
;
2925 ElfNAME (Off
) data_off
;
2926 ElfNAME (Word
) data_max
;
2927 char buf
[4]; /* FIXME -- might be elf64 */
2931 if (asect
->relocation
)
2933 if (asect
->reloc_count
== 0)
2935 if (asect
->flags
& SEC_CONSTRUCTOR
)
2938 bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
);
2939 native_relocs
= (Elf_External_Rel
*)
2940 bfd_alloc (abfd
, asect
->reloc_count
* sizeof (Elf_External_Rel
));
2943 bfd_set_error (bfd_error_no_memory
);
2946 bfd_read ((PTR
) native_relocs
,
2947 sizeof (Elf_External_Rel
), asect
->reloc_count
, abfd
);
2949 reloc_cache
= (arelent
*)
2950 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2954 bfd_set_error (bfd_error_no_memory
);
2958 /* Get the offset of the start of the segment we are relocating to read in
2959 the implicit addend. */
2960 data_hdr
= &elf_section_data(asect
)->this_hdr
;
2961 data_off
= data_hdr
->sh_offset
;
2962 data_max
= data_hdr
->sh_size
- sizeof (buf
) + 1;
2965 elf_debug_section ("data section", -1, data_hdr
);
2968 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2970 #ifdef RELOC_PROCESSING
2971 Elf_Internal_Rel dst
;
2972 Elf_External_Rel
*src
;
2974 cache_ptr
= reloc_cache
+ idx
;
2975 src
= native_relocs
+ idx
;
2976 elf_swap_reloc_in (abfd
, src
, &dst
);
2978 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2980 Elf_Internal_Rel dst
;
2981 Elf_External_Rel
*src
;
2983 cache_ptr
= reloc_cache
+ idx
;
2984 src
= native_relocs
+ idx
;
2986 elf_swap_reloc_in (abfd
, src
, &dst
);
2988 if (asect
->flags
& SEC_RELOC
)
2990 /* relocatable, so the offset is off of the section */
2991 cache_ptr
->address
= dst
.r_offset
+ asect
->vma
;
2995 /* non-relocatable, so the offset a virtual address */
2996 cache_ptr
->address
= dst
.r_offset
;
2999 /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset
3000 of zero points to the dummy symbol, which was not read into
3001 the symbol table SYMBOLS. */
3002 if (ELF_R_SYM (dst
.r_info
) == 0)
3003 cache_ptr
->sym_ptr_ptr
= bfd_abs_section
.symbol_ptr_ptr
;
3008 cache_ptr
->sym_ptr_ptr
= symbols
+ ELF_R_SYM (dst
.r_info
) - 1;
3010 /* Translate any ELF section symbol into a BFD section
3012 s
= *(cache_ptr
->sym_ptr_ptr
);
3013 if (s
->flags
& BSF_SECTION_SYM
)
3015 cache_ptr
->sym_ptr_ptr
= s
->section
->symbol_ptr_ptr
;
3016 s
= *cache_ptr
->sym_ptr_ptr
;
3017 if (s
->name
== 0 || s
->name
[0] == 0)
3021 BFD_ASSERT (dst
.r_offset
<= data_max
);
3022 cache_ptr
->addend
= 0;
3024 /* Fill in the cache_ptr->howto field from dst.r_type */
3026 struct elf_backend_data
*ebd
= get_elf_backend_data (abfd
);
3027 (*ebd
->elf_info_to_howto_rel
) (abfd
, cache_ptr
, &dst
);
3032 asect
->relocation
= reloc_cache
;
3037 elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3043 arelent
*tblptr
= section
->relocation
;
3044 unsigned int count
= 0;
3045 int use_rela_p
= get_elf_backend_data (abfd
)->use_rela_p
;
3047 /* snarfed from coffcode.h */
3049 elf_slurp_reloca_table (abfd
, section
, symbols
);
3051 elf_slurp_reloc_table (abfd
, section
, symbols
);
3053 tblptr
= section
->relocation
;
3057 for (; count
++ < section
->reloc_count
;)
3058 *relptr
++ = tblptr
++;
3061 return section
->reloc_count
;
3065 DEFUN (elf_get_symtab
, (abfd
, alocation
),
3067 asymbol
** alocation
)
3070 if (!elf_slurp_symbol_table (abfd
, alocation
))
3073 return bfd_get_symcount (abfd
);
3077 DEFUN (elf_make_empty_symbol
, (abfd
),
3080 elf_symbol_type
*newsym
;
3082 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
3085 bfd_set_error (bfd_error_no_memory
);
3090 newsym
->symbol
.the_bfd
= abfd
;
3091 return &newsym
->symbol
;
3096 DEFUN (elf_get_symbol_info
, (ignore_abfd
, symbol
, ret
),
3097 bfd
* ignore_abfd AND
3098 asymbol
* symbol AND
3101 bfd_symbol_info (symbol
, ret
);
3105 DEFUN (elf_print_symbol
, (ignore_abfd
, filep
, symbol
, how
),
3106 bfd
* ignore_abfd AND
3108 asymbol
* symbol AND
3109 bfd_print_symbol_type how
)
3111 FILE *file
= (FILE *) filep
;
3114 case bfd_print_symbol_name
:
3115 fprintf (file
, "%s", symbol
->name
);
3117 case bfd_print_symbol_more
:
3118 fprintf (file
, "elf ");
3119 fprintf_vma (file
, symbol
->value
);
3120 fprintf (file
, " %lx", (long) symbol
->flags
);
3122 case bfd_print_symbol_all
:
3124 CONST
char *section_name
;
3125 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
3126 bfd_print_symbol_vandf ((PTR
) file
, symbol
);
3127 fprintf (file
, " %s\t%s",
3137 DEFUN (elf_get_lineno
, (ignore_abfd
, symbol
),
3138 bfd
* ignore_abfd AND
3141 fprintf (stderr
, "elf_get_lineno unimplemented\n");
3148 DEFUN (elf_set_arch_mach
, (abfd
, arch
, machine
),
3150 enum bfd_architecture arch AND
3151 unsigned long machine
)
3153 /* Allow any architecture to be supported by the elf backend */
3156 case bfd_arch_unknown
: /* EM_NONE */
3157 case bfd_arch_sparc
: /* EM_SPARC */
3158 case bfd_arch_i386
: /* EM_386 */
3159 case bfd_arch_m68k
: /* EM_68K */
3160 case bfd_arch_m88k
: /* EM_88K */
3161 case bfd_arch_i860
: /* EM_860 */
3162 case bfd_arch_mips
: /* EM_MIPS (MIPS R3000) */
3163 case bfd_arch_hppa
: /* EM_HPPA (HP PA_RISC) */
3164 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
3171 DEFUN (elf_find_nearest_line
, (abfd
,
3179 asection
* section AND
3180 asymbol
** symbols AND
3182 CONST
char **filename_ptr AND
3183 CONST
char **functionname_ptr AND
3184 unsigned int *line_ptr
)
3190 DEFUN (elf_sizeof_headers
, (abfd
, reloc
),
3194 fprintf (stderr
, "elf_sizeof_headers unimplemented\n");
3201 DEFUN (elf_set_section_contents
, (abfd
, section
, location
, offset
, count
),
3206 bfd_size_type count
)
3208 Elf_Internal_Shdr
*hdr
;
3210 if (abfd
->output_has_begun
== false) /* set by bfd.c handler? */
3212 /* do setup calculations (FIXME) */
3213 if (prep_headers (abfd
) == false)
3215 if (elf_compute_section_file_positions (abfd
) == false)
3217 abfd
->output_has_begun
= true;
3220 hdr
= &elf_section_data(section
)->this_hdr
;
3222 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
3224 if (bfd_write (location
, 1, count
, abfd
) != count
)
3231 DEFUN (elf_no_info_to_howto
, (abfd
, cache_ptr
, dst
),
3233 arelent
* cache_ptr AND
3234 Elf_Internal_Rela
* dst
)
3236 fprintf (stderr
, "elf RELA relocation support for target machine unimplemented\n");
3242 DEFUN (elf_no_info_to_howto_rel
, (abfd
, cache_ptr
, dst
),
3244 arelent
* cache_ptr AND
3245 Elf_Internal_Rel
* dst
)
3247 fprintf (stderr
, "elf REL relocation support for target machine unimplemented\n");
3253 /* Core file support */
3255 #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
3256 #include <sys/procfs.h>
3258 #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */
3259 #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */
3260 #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */
3266 DEFUN (bfd_prstatus
, (abfd
, descdata
, descsz
, filepos
),
3273 prstatus_t
*status
= (prstatus_t
*) 0;
3275 if (descsz
== sizeof (prstatus_t
))
3277 newsect
= bfd_make_section (abfd
, ".reg");
3278 newsect
->_raw_size
= sizeof (status
->pr_reg
);
3279 newsect
->filepos
= filepos
+ (long) &status
->pr_reg
;
3280 newsect
->flags
= SEC_ALLOC
| SEC_HAS_CONTENTS
;
3281 newsect
->alignment_power
= 2;
3282 if ((core_prstatus (abfd
) = bfd_alloc (abfd
, descsz
)) != NULL
)
3284 memcpy (core_prstatus (abfd
), descdata
, descsz
);
3289 /* Stash a copy of the prpsinfo structure away for future use. */
3292 DEFUN (bfd_prpsinfo
, (abfd
, descdata
, descsz
, filepos
),
3300 if (descsz
== sizeof (prpsinfo_t
))
3302 if ((core_prpsinfo (abfd
) = bfd_alloc (abfd
, descsz
)) != NULL
)
3304 memcpy (core_prpsinfo (abfd
), descdata
, descsz
);
3310 DEFUN (bfd_fpregset
, (abfd
, descdata
, descsz
, filepos
),
3318 newsect
= bfd_make_section (abfd
, ".reg2");
3319 newsect
->_raw_size
= descsz
;
3320 newsect
->filepos
= filepos
;
3321 newsect
->flags
= SEC_ALLOC
| SEC_HAS_CONTENTS
;
3322 newsect
->alignment_power
= 2;
3325 #endif /* HAVE_PROCFS */
3327 /* Return a pointer to the args (including the command name) that were
3328 seen by the program that generated the core dump. Note that for
3329 some reason, a spurious space is tacked onto the end of the args
3330 in some (at least one anyway) implementations, so strip it off if
3334 DEFUN (elf_core_file_failing_command
, (abfd
),
3338 if (core_prpsinfo (abfd
))
3340 prpsinfo_t
*p
= core_prpsinfo (abfd
);
3341 char *scan
= p
->pr_psargs
;
3346 if ((scan
> p
->pr_psargs
) && (*scan
== ' '))
3350 return p
->pr_psargs
;
3356 /* Return the number of the signal that caused the core dump. Presumably,
3357 since we have a core file, we got a signal of some kind, so don't bother
3358 checking the other process status fields, just return the signal number.
3362 DEFUN (elf_core_file_failing_signal
, (abfd
),
3366 if (core_prstatus (abfd
))
3368 return ((prstatus_t
*) (core_prstatus (abfd
)))->pr_cursig
;
3374 /* Check to see if the core file could reasonably be expected to have
3375 come for the current executable file. Note that by default we return
3376 true unless we find something that indicates that there might be a
3381 DEFUN (elf_core_file_matches_executable_p
, (core_bfd
, exec_bfd
),
3390 /* First, xvecs must match since both are ELF files for the same target. */
3392 if (core_bfd
->xvec
!= exec_bfd
->xvec
)
3394 bfd_set_error (bfd_error_system_call
);
3400 /* If no prpsinfo, just return true. Otherwise, grab the last component
3401 of the exec'd pathname from the prpsinfo. */
3403 if (core_prpsinfo (core_bfd
))
3405 corename
= (((struct prpsinfo
*) core_prpsinfo (core_bfd
))->pr_fname
);
3412 /* Find the last component of the executable pathname. */
3414 if ((execname
= strrchr (exec_bfd
->filename
, '/')) != NULL
)
3420 execname
= (char *) exec_bfd
->filename
;
3423 /* See if they match */
3425 return strcmp (execname
, corename
) ? false : true;
3431 #endif /* HAVE_PROCFS */
3434 /* ELF core files contain a segment of type PT_NOTE, that holds much of
3435 the information that would normally be available from the /proc interface
3436 for the process, at the time the process dumped core. Currently this
3437 includes copies of the prstatus, prpsinfo, and fpregset structures.
3439 Since these structures are potentially machine dependent in size and
3440 ordering, bfd provides two levels of support for them. The first level,
3441 available on all machines since it does not require that the host
3442 have /proc support or the relevant include files, is to create a bfd
3443 section for each of the prstatus, prpsinfo, and fpregset structures,
3444 without any interpretation of their contents. With just this support,
3445 the bfd client will have to interpret the structures itself. Even with
3446 /proc support, it might want these full structures for it's own reasons.
3448 In the second level of support, where HAVE_PROCFS is defined, bfd will
3449 pick apart the structures to gather some additional information that
3450 clients may want, such as the general register set, the name of the
3451 exec'ed file and its arguments, the signal (if any) that caused the
3457 DEFUN (elf_corefile_note
, (abfd
, hdr
),
3459 Elf_Internal_Phdr
* hdr
)
3461 Elf_External_Note
*x_note_p
; /* Elf note, external form */
3462 Elf_Internal_Note i_note
; /* Elf note, internal form */
3463 char *buf
= NULL
; /* Entire note segment contents */
3464 char *namedata
; /* Name portion of the note */
3465 char *descdata
; /* Descriptor portion of the note */
3466 char *sectname
; /* Name to use for new section */
3467 long filepos
; /* File offset to descriptor data */
3470 if (hdr
->p_filesz
> 0
3471 && (buf
= (char *) malloc (hdr
->p_filesz
)) != NULL
3472 && bfd_seek (abfd
, hdr
->p_offset
, SEEK_SET
) != -1
3473 && bfd_read ((PTR
) buf
, hdr
->p_filesz
, 1, abfd
) == hdr
->p_filesz
)
3475 x_note_p
= (Elf_External_Note
*) buf
;
3476 while ((char *) x_note_p
< (buf
+ hdr
->p_filesz
))
3478 i_note
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_note_p
->namesz
);
3479 i_note
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_note_p
->descsz
);
3480 i_note
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_note_p
->type
);
3481 namedata
= x_note_p
->name
;
3482 descdata
= namedata
+ BFD_ALIGN (i_note
.namesz
, 4);
3483 filepos
= hdr
->p_offset
+ (descdata
- buf
);
3484 switch (i_note
.type
)
3487 /* process descdata as prstatus info */
3488 bfd_prstatus (abfd
, descdata
, i_note
.descsz
, filepos
);
3489 sectname
= ".prstatus";
3492 /* process descdata as fpregset info */
3493 bfd_fpregset (abfd
, descdata
, i_note
.descsz
, filepos
);
3494 sectname
= ".fpregset";
3497 /* process descdata as prpsinfo */
3498 bfd_prpsinfo (abfd
, descdata
, i_note
.descsz
, filepos
);
3499 sectname
= ".prpsinfo";
3502 /* Unknown descriptor, just ignore it. */
3506 if (sectname
!= NULL
)
3508 newsect
= bfd_make_section (abfd
, sectname
);
3509 newsect
->_raw_size
= i_note
.descsz
;
3510 newsect
->filepos
= filepos
;
3511 newsect
->flags
= SEC_ALLOC
| SEC_HAS_CONTENTS
;
3512 newsect
->alignment_power
= 2;
3514 x_note_p
= (Elf_External_Note
*)
3515 (descdata
+ BFD_ALIGN (i_note
.descsz
, 4));
3522 else if (hdr
->p_filesz
> 0)
3524 bfd_set_error (bfd_error_no_memory
);
3531 /* Core files are simply standard ELF formatted files that partition
3532 the file using the execution view of the file (program header table)
3533 rather than the linking view. In fact, there is no section header
3534 table in a core file.
3536 The process status information (including the contents of the general
3537 register set) and the floating point register set are stored in a
3538 segment of type PT_NOTE. We handcraft a couple of extra bfd sections
3539 that allow standard bfd access to the general registers (.reg) and the
3540 floating point registers (.reg2).
3545 DEFUN (elf_core_file_p
, (abfd
), bfd
* abfd
)
3547 Elf_External_Ehdr x_ehdr
; /* Elf file header, external form */
3548 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3549 Elf_External_Phdr x_phdr
; /* Program header table entry, external form */
3550 Elf_Internal_Phdr
*i_phdrp
; /* Program header table, internal form */
3551 unsigned int phindex
;
3553 /* Read in the ELF header in external format. */
3555 if (bfd_read ((PTR
) & x_ehdr
, sizeof (x_ehdr
), 1, abfd
) != sizeof (x_ehdr
))
3557 bfd_set_error (bfd_error_system_call
);
3561 /* Now check to see if we have a valid ELF file, and one that BFD can
3562 make use of. The magic number must match, the address size ('class')
3563 and byte-swapping must match our XVEC entry, and it must have a
3564 program header table (FIXME: See comments re segments at top of this
3567 if (elf_file_p (&x_ehdr
) == false)
3570 bfd_set_error (bfd_error_wrong_format
);
3574 /* FIXME, Check EI_VERSION here ! */
3578 int desired_address_size
= ELFCLASS32
;
3581 int desired_address_size
= ELFCLASS64
;
3584 if (x_ehdr
.e_ident
[EI_CLASS
] != desired_address_size
)
3588 /* Switch xvec to match the specified byte order. */
3589 switch (x_ehdr
.e_ident
[EI_DATA
])
3591 case ELFDATA2MSB
: /* Big-endian */
3592 if (abfd
->xvec
->byteorder_big_p
== false)
3595 case ELFDATA2LSB
: /* Little-endian */
3596 if (abfd
->xvec
->byteorder_big_p
== true)
3599 case ELFDATANONE
: /* No data encoding specified */
3600 default: /* Unknown data encoding specified */
3604 /* Allocate an instance of the elf_obj_tdata structure and hook it up to
3605 the tdata pointer in the bfd. */
3608 (struct elf_obj_tdata
*) bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
3609 if (elf_tdata (abfd
) == NULL
)
3611 bfd_set_error (bfd_error_no_memory
);
3615 /* FIXME, `wrong' returns from this point onward, leak memory. */
3617 /* Now that we know the byte order, swap in the rest of the header */
3618 i_ehdrp
= elf_elfheader (abfd
);
3619 elf_swap_ehdr_in (abfd
, &x_ehdr
, i_ehdrp
);
3621 elf_debug_file (i_ehdrp
);
3624 /* If there is no program header, or the type is not a core file, then
3626 if (i_ehdrp
->e_phoff
== 0 || i_ehdrp
->e_type
!= ET_CORE
)
3629 /* Allocate space for a copy of the program header table in
3630 internal form, seek to the program header table in the file,
3631 read it in, and convert it to internal form. As a simple sanity
3632 check, verify that the what BFD thinks is the size of each program
3633 header table entry actually matches the size recorded in the file. */
3635 if (i_ehdrp
->e_phentsize
!= sizeof (x_phdr
))
3637 i_phdrp
= (Elf_Internal_Phdr
*)
3638 bfd_alloc (abfd
, sizeof (*i_phdrp
) * i_ehdrp
->e_phnum
);
3641 bfd_set_error (bfd_error_no_memory
);
3644 if (bfd_seek (abfd
, i_ehdrp
->e_phoff
, SEEK_SET
) == -1)
3646 bfd_set_error (bfd_error_system_call
);
3649 for (phindex
= 0; phindex
< i_ehdrp
->e_phnum
; phindex
++)
3651 if (bfd_read ((PTR
) & x_phdr
, sizeof (x_phdr
), 1, abfd
)
3654 bfd_set_error (bfd_error_system_call
);
3657 elf_swap_phdr_in (abfd
, &x_phdr
, i_phdrp
+ phindex
);
3660 /* Once all of the program headers have been read and converted, we
3661 can start processing them. */
3663 for (phindex
= 0; phindex
< i_ehdrp
->e_phnum
; phindex
++)
3665 bfd_section_from_phdr (abfd
, i_phdrp
+ phindex
, phindex
);
3666 if ((i_phdrp
+ phindex
)->p_type
== PT_NOTE
)
3668 elf_corefile_note (abfd
, i_phdrp
+ phindex
);
3672 /* Remember the entry point specified in the ELF file header. */
3674 bfd_get_start_address (abfd
) = i_ehdrp
->e_entry
;