1 /* ELF executable support for BFD.
2 Copyright (C) 1991, 1992 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
14 This file is part of BFD, the Binary File Descriptor library.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 2 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program; if not, write to the Free Software
28 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
31 /****************************************
35 This is only a partial ELF implementation,
36 incorporating only those parts that are
37 required to get gdb up and running. It is
38 expected that it will be expanded to a full
39 ELF implementation at some future date.
41 Unimplemented stubs call abort() to ensure
42 that they get proper attention if they are
43 ever called. The stubs are here since
44 this version was hacked from the COFF
45 version, and thus they will probably
46 go away or get expanded appropriately in a
51 *****************************************/
54 /* Problems and other issues to resolve.
56 (1) BFD expects there to be some fixed number of "sections" in
57 the object file. I.E. there is a "section_count" variable in the
58 bfd structure which contains the number of sections. However, ELF
59 supports multiple "views" of a file. In particular, with current
60 implementations, executable files typically have two tables, a
61 program header table and a section header table, both of which
62 partition the executable.
64 In ELF-speak, the "linking view" of the file uses the section header
65 table to access "sections" within the file, and the "execution view"
66 uses the program header table to access "segments" within the file.
67 "Segments" typically may contain all the data from one or more
70 Note that the section header table is optional in ELF executables,
71 but it is this information that is most useful to gdb. If the
72 section header table is missing, then gdb should probably try
73 to make do with the program header table. (FIXME)
81 #include "elf/common.h"
82 #include "elf/internal.h"
83 #include "elf/external.h"
85 #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
86 #include <sys/procfs.h>
88 #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */
89 #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */
90 #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */
93 /* Forward data declarations */
95 extern bfd_target elf_little_vec
, elf_big_vec
;
97 /* Currently the elf_symbol_type struct just contains the generic bfd
105 /* Some private data is stashed away for future use using the tdata pointer
106 in the bfd structure. */
110 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
111 Elf_Internal_Shdr
*elf_sect_ptr
;
112 struct strtab
*strtab_ptr
;
114 void *prstatus
; /* The raw /proc prstatus structure */
115 void *prpsinfo
; /* The raw /proc prpsinfo structure */
118 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
119 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
120 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
121 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
122 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
123 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
124 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
126 /* Translate an ELF symbol in external format into an ELF symbol in internal
130 DEFUN(elf_swap_symbol_in
,(abfd
, src
, dst
),
132 Elf_External_Sym
*src AND
133 Elf_Internal_Sym
*dst
)
135 dst
-> st_name
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> st_name
);
136 dst
-> st_value
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> st_value
);
137 dst
-> st_size
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> st_size
);
138 dst
-> st_info
= bfd_h_get_8 (abfd
, (bfd_byte
*) src
-> st_info
);
139 dst
-> st_other
= bfd_h_get_8 (abfd
, (bfd_byte
*) src
-> st_other
);
140 dst
-> st_shndx
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> st_shndx
);
143 /* Translate an ELF symbol in internal format into an ELF symbol in external
147 DEFUN(elf_swap_symbol_out
,(abfd
, src
, dst
),
149 Elf_Internal_Sym
*src AND
150 Elf_External_Sym
*dst
)
152 bfd_h_put_32 (abfd
, src
->st_name
, dst
->st_name
);
153 bfd_h_put_32 (abfd
, src
->st_value
, dst
->st_value
);
154 bfd_h_put_32 (abfd
, src
->st_size
, dst
->st_size
);
155 bfd_h_put_8 (abfd
, src
->st_info
, dst
->st_info
);
156 bfd_h_put_8 (abfd
, src
->st_other
, dst
->st_other
);
157 bfd_h_put_16 (abfd
, src
->st_shndx
, dst
->st_shndx
);
161 /* Translate an ELF file header in external format into an ELF file header in
165 DEFUN(elf_swap_ehdr_in
,(abfd
, src
, dst
),
167 Elf_External_Ehdr
*src AND
168 Elf_Internal_Ehdr
*dst
)
170 memcpy (dst
-> e_ident
, src
-> e_ident
, EI_NIDENT
);
171 dst
-> e_type
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_type
);
172 dst
-> e_machine
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_machine
);
173 dst
-> e_version
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> e_version
);
174 dst
-> e_entry
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> e_entry
);
175 dst
-> e_phoff
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> e_phoff
);
176 dst
-> e_shoff
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> e_shoff
);
177 dst
-> e_flags
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
-> e_flags
);
178 dst
-> e_ehsize
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_ehsize
);
179 dst
-> e_phentsize
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_phentsize
);
180 dst
-> e_phnum
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_phnum
);
181 dst
-> e_shentsize
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_shentsize
);
182 dst
-> e_shnum
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_shnum
);
183 dst
-> e_shstrndx
= bfd_h_get_16 (abfd
, (bfd_byte
*) src
-> e_shstrndx
);
186 /* Translate an ELF file header in internal format into an ELF file header in
190 DEFUN(elf_swap_ehdr_out
,(abfd
, src
, dst
),
192 Elf_Internal_Ehdr
*src AND
193 Elf_External_Ehdr
*dst
)
195 memcpy (dst
-> e_ident
, src
-> e_ident
, EI_NIDENT
);
196 /* note that all elements of dst are *arrays of unsigned char* already... */
197 bfd_h_put_16 (abfd
, src
->e_type
, dst
->e_type
);
198 bfd_h_put_16 (abfd
, src
->e_machine
, dst
->e_machine
);
199 bfd_h_put_32 (abfd
, src
->e_version
, dst
->e_version
);
200 bfd_h_put_32 (abfd
, src
->e_entry
, dst
->e_entry
);
201 bfd_h_put_32 (abfd
, src
->e_phoff
, dst
->e_phoff
);
202 bfd_h_put_32 (abfd
, src
->e_shoff
, dst
->e_shoff
);
203 bfd_h_put_32 (abfd
, src
->e_flags
, dst
->e_flags
);
204 bfd_h_put_16 (abfd
, src
->e_ehsize
, dst
->e_ehsize
);
205 bfd_h_put_16 (abfd
, src
->e_phentsize
, dst
->e_phentsize
);
206 bfd_h_put_16 (abfd
, src
->e_phnum
, dst
->e_phnum
);
207 bfd_h_put_16 (abfd
, src
->e_shentsize
, dst
->e_shentsize
);
208 bfd_h_put_16 (abfd
, src
->e_shnum
, dst
->e_shnum
);
209 bfd_h_put_16 (abfd
, src
->e_shstrndx
, dst
->e_shstrndx
);
213 /* Translate an ELF section header table entry in external format into an
214 ELF section header table entry in internal format. */
217 DEFUN(elf_swap_shdr_in
,(abfd
, src
, dst
),
219 Elf_External_Shdr
*src AND
220 Elf_Internal_Shdr
*dst
)
222 dst
->sh_name
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_name
);
223 dst
->sh_type
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_type
);
224 dst
->sh_flags
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_flags
);
225 dst
->sh_addr
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_addr
);
226 dst
->sh_offset
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_offset
);
227 dst
->sh_size
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_size
);
228 dst
->sh_link
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_link
);
229 dst
->sh_info
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_info
);
230 dst
->sh_addralign
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_addralign
);
231 dst
->sh_entsize
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->sh_entsize
);
232 /* we haven't done any processing on it yet, so... */
233 dst
->rawdata
= (void*)0;
236 /* Translate an ELF section header table entry in internal format into an
237 ELF section header table entry in external format. */
240 DEFUN(elf_swap_shdr_out
,(abfd
, src
, dst
),
242 Elf_Internal_Shdr
*src AND
243 Elf_External_Shdr
*dst
)
245 /* note that all elements of dst are *arrays of unsigned char* already... */
246 bfd_h_put_32 (abfd
, src
->sh_name
, dst
->sh_name
);
247 bfd_h_put_32 (abfd
, src
->sh_type
, dst
->sh_type
);
248 bfd_h_put_32 (abfd
, src
->sh_flags
, dst
->sh_flags
);
249 bfd_h_put_32 (abfd
, src
->sh_addr
, dst
->sh_addr
);
250 bfd_h_put_32 (abfd
, src
->sh_offset
, dst
->sh_offset
);
251 bfd_h_put_32 (abfd
, src
->sh_size
, dst
->sh_size
);
252 bfd_h_put_32 (abfd
, src
->sh_link
, dst
->sh_link
);
253 bfd_h_put_32 (abfd
, src
->sh_info
, dst
->sh_info
);
254 bfd_h_put_32 (abfd
, src
->sh_addralign
, dst
->sh_addralign
);
255 bfd_h_put_32 (abfd
, src
->sh_entsize
, dst
->sh_entsize
);
259 /* Translate an ELF program header table entry in external format into an
260 ELF program header table entry in internal format. */
263 DEFUN(elf_swap_phdr_in
,(abfd
, src
, dst
),
265 Elf_External_Phdr
*src AND
266 Elf_Internal_Phdr
*dst
)
268 dst
->p_type
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_type
);
269 dst
->p_offset
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_offset
);
270 dst
->p_vaddr
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_vaddr
);
271 dst
->p_paddr
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_paddr
);
272 dst
->p_filesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_filesz
);
273 dst
->p_memsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_memsz
);
274 dst
->p_flags
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_flags
);
275 dst
->p_align
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->p_align
);
279 /* Translate an ELF reloc from external format to internal format. */
281 DEFUN(elf_swap_reloc_in
,(abfd
, src
, dst
),
283 Elf_External_Rel
*src AND
284 Elf_Internal_Rel
*dst
)
286 dst
->r_offset
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->r_offset
);
287 dst
->r_info
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->r_info
);
291 DEFUN(elf_swap_reloca_in
,(abfd
, src
, dst
),
293 Elf_External_Rela
*src AND
294 Elf_Internal_Rela
*dst
)
296 dst
->r_offset
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->r_offset
);
297 dst
->r_info
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->r_info
);
298 dst
->r_addend
= bfd_h_get_32 (abfd
, (bfd_byte
*) src
->r_addend
);
301 /* Translate an ELF reloc from internal format to external format. */
303 DEFUN(elf_swap_reloc_out
,(abfd
, src
, dst
),
305 Elf_Internal_Rel
*src AND
306 Elf_External_Rel
*dst
)
308 bfd_h_put_32 (abfd
, src
->r_offset
, dst
->r_offset
);
309 bfd_h_put_32 (abfd
, src
->r_info
, dst
->r_info
);
313 DEFUN(elf_swap_reloca_out
,(abfd
, src
, dst
),
315 Elf_Internal_Rela
*src AND
316 Elf_External_Rela
*dst
)
318 bfd_h_put_32 (abfd
, src
->r_offset
, dst
->r_offset
);
319 bfd_h_put_32 (abfd
, src
->r_info
, dst
->r_info
);
320 bfd_h_put_32 (abfd
, src
->r_addend
, dst
->r_addend
);
323 static char *EXFUN(elf_read
, (bfd
*, long, int));
324 static struct sec
* EXFUN(section_from_elf_index
, (bfd
*, int));
325 static int EXFUN(elf_section_from_bfd_section
, (bfd
*, struct sec
*));
326 static boolean
EXFUN(elf_slurp_symbol_table
, (bfd
*, asymbol
**));
327 static void EXFUN(elf_info_to_howto
, (bfd
*, arelent
*, Elf_Internal_Rela
*));
328 static char *EXFUN(elf_get_str_section
, (bfd
*, unsigned int));
335 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
338 Helper functions for GDB to locate the string tables.
339 Since BFD hides string tables from callers, GDB needs to use an
340 internal hook to find them. Sun's .stabstr, in particular,
341 isn't even pointed to by the .stab section, so ordinary
342 mechanisms wouldn't work to find it, even if we had some.
345 struct elf_internal_shdr
*
346 DEFUN(bfd_elf_find_section
, (abfd
, name
),
350 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
351 char *shstrtab
= elf_get_str_section (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
352 unsigned int max
= elf_elfheader (abfd
)->e_shnum
;
355 for (i
= 1; i
< max
; i
++)
356 if (!strcmp (&shstrtab
[i_shdrp
[i
].sh_name
], name
))
361 /* End of GDB support. */
364 DEFUN(elf_get_str_section
, (abfd
, shindex
),
366 unsigned int shindex
)
368 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
369 unsigned int shstrtabsize
= i_shdrp
[shindex
].sh_size
;
370 unsigned int offset
= i_shdrp
[shindex
].sh_offset
;
371 char *shstrtab
= i_shdrp
[shindex
].rawdata
;
376 if ((shstrtab
= elf_read (abfd
, offset
, shstrtabsize
)) == NULL
)
380 i_shdrp
[shindex
].rawdata
= (void*)shstrtab
;
385 DEFUN(elf_string_from_elf_section
, (abfd
, shindex
, strindex
),
387 unsigned int shindex AND
388 unsigned int strindex
)
390 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
391 Elf_Internal_Shdr
*hdr
= i_shdrp
+ shindex
;
395 if (elf_get_str_section (abfd
, shindex
) == NULL
)
400 return ((char*)hdr
->rawdata
)+strindex
;
403 #define elf_string_from_elf_strtab(abfd, strindex) \
404 elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, strindex)
406 /* Create a new bfd section from an ELF section header. */
409 DEFUN(bfd_section_from_shdr
, (abfd
, shindex
),
411 unsigned int shindex
)
413 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
414 Elf_Internal_Shdr
*hdr
= i_shdrp
+ shindex
;
418 name
= hdr
->sh_name
?
419 elf_string_from_elf_strtab (abfd
, hdr
->sh_name
) : "unnamed";
421 switch(hdr
->sh_type
) {
424 /* inactive section. Throw it away. */
429 /* Bits that get saved. This one is real. */
432 newsect
= bfd_make_section (abfd
, name
);
433 newsect
->vma
= hdr
->sh_addr
;
434 newsect
->_raw_size
= hdr
->sh_size
;
435 newsect
->filepos
= hdr
->sh_offset
; /* so we can read back the bits */
436 newsect
->flags
|= SEC_HAS_CONTENTS
;
438 if (hdr
->sh_flags
& SHF_ALLOC
)
440 newsect
->flags
|= SEC_ALLOC
;
441 if (hdr
->sh_type
!= SHT_NOBITS
)
442 newsect
->flags
|= SEC_LOAD
;
445 if (!(hdr
->sh_flags
& SHF_WRITE
))
446 newsect
->flags
|= SEC_READONLY
;
448 if (hdr
->sh_flags
& SHF_EXECINSTR
)
449 newsect
->flags
|= SEC_CODE
; /* FIXME: may only contain SOME code */
451 newsect
->flags
|= SEC_DATA
;
453 hdr
->rawdata
= (void*)newsect
;
458 case SHT_SYMTAB
: /* A symbol table */
459 BFD_ASSERT (hdr
->sh_entsize
== sizeof (Elf_External_Sym
));
460 elf_onesymtab (abfd
) = shindex
;
461 abfd
->flags
|= HAS_SYMS
;
464 case SHT_STRTAB
: /* A string table */
469 /* *these* do a lot of work -- but build no sections! */
470 /* the spec says there can be multiple strtabs, but only one symtab */
471 /* but there can be lots of REL* sections. */
472 /* FIXME: The above statement is wrong! There are typically at least
473 two symbol tables in a dynamically linked executable, ".dynsym"
474 which is the dynamic linkage symbol table and ".symtab", which is
475 the "traditional" symbol table. -fnf */
478 asection
*target_sect
;
481 bfd_section_from_shdr (abfd
, hdr
->sh_link
); /* symbol table */
482 bfd_section_from_shdr (abfd
, hdr
->sh_info
); /* target */
483 target_sect
= section_from_elf_index (abfd
, hdr
->sh_info
);
484 if (target_sect
== NULL
)
488 /* FIXME: We are only prepared to read one symbol table, so
489 do NOT read the dynamic symbol table since it is only a
490 subset of the full symbol table. Also see comment above. -fnf */
491 if (!elf_slurp_symbol_table(abfd
, i_shdrp
+ hdr
->sh_link
))
495 target_sect
->reloc_count
= hdr
->sh_size
/ hdr
->sh_entsize
;
496 target_sect
->flags
|= SEC_RELOC
;
497 target_sect
->relocation
= 0;
498 target_sect
->rel_filepos
= hdr
->sh_offset
;
505 case SHT_DYNSYM
: /* could treat this like symtab... */
507 fprintf(stderr
, "Dynamic Linking sections not yet supported.\n");
514 fprintf(stderr
, "Note Sections not yet supported.\n");
521 fprintf(stderr
, "SHLIB Sections not supported (and non conforming.)\n");
542 static struct strtab
*
543 DEFUN(bfd_new_strtab
, (abfd
),
548 ss
= (struct strtab
*)malloc(sizeof(struct strtab
));
550 BFD_ASSERT(ss
->tab
!= 0);
559 DEFUN(bfd_add_to_strtab
, (abfd
, ss
, str
),
561 struct strtab
*ss AND
564 /* should search first, but for now: */
565 /* include the trailing NUL */
566 int ln
= strlen(str
)+1;
568 /* should this be using obstacks? */
569 ss
->tab
= realloc(ss
->tab
, ss
->length
+ ln
);
571 BFD_ASSERT(ss
->tab
!= 0);
572 strcpy(ss
->tab
+ ss
->length
, str
);
576 return ss
->length
- ln
;
580 DEFUN(bfd_add_2_to_strtab
, (abfd
, ss
, str
, str2
),
582 struct strtab
*ss AND
586 /* should search first, but for now: */
587 /* include the trailing NUL */
588 int ln
= strlen(str
)+strlen(str2
)+1;
590 /* should this be using obstacks? */
592 ss
->tab
= realloc(ss
->tab
, ss
->length
+ ln
);
594 ss
->tab
= malloc(ln
);
596 BFD_ASSERT(ss
->tab
!= 0);
597 strcpy(ss
->tab
+ ss
->length
, str
);
598 strcpy(ss
->tab
+ ss
->length
+ strlen(str
), str2
);
602 return ss
->length
- ln
;
605 /* Create a new ELF section from a bfd section. */
608 DEFUN(bfd_shdr_from_section
, (abfd
, hdr
, shstrtab
, indx
),
610 Elf_Internal_Shdr
*hdr AND
611 struct strtab
*shstrtab AND
617 /* figure out out to write the section name from the bfd section name. MWE */
619 sect
= abfd
->sections
;
620 for (ndx
= indx
; --ndx
; )
624 hdr
[indx
].sh_name
= bfd_add_to_strtab(abfd
, shstrtab
,
625 bfd_section_name(abfd
, sect
));
626 hdr
[indx
].sh_addr
= sect
->vma
;
627 hdr
[indx
].sh_size
= sect
->_raw_size
;
628 hdr
[indx
].sh_flags
= 0;
629 /* these need to be preserved on */
630 hdr
[indx
].sh_link
= 0;
631 hdr
[indx
].sh_info
= 0;
632 hdr
[indx
].sh_addralign
= 0;
633 hdr
[indx
].sh_entsize
= 0;
635 hdr
[indx
].sh_type
= 0;
636 if (sect
->flags
& SEC_RELOC
) {
637 hdr
[indx
].sh_type
= SHT_RELA
; /* FIXME -- sparc specific */
640 if (sect
->flags
& SEC_HAS_CONTENTS
)
642 hdr
[indx
].sh_offset
= sect
->filepos
;
643 hdr
[indx
].sh_size
= sect
->_raw_size
;
645 if (sect
->flags
& SEC_ALLOC
)
647 hdr
[indx
].sh_flags
|= SHF_ALLOC
;
648 if (sect
->flags
& SEC_LOAD
)
650 /* do something with sh_type ? */
653 if (!(sect
->flags
& SEC_READONLY
))
654 hdr
[indx
].sh_flags
|= SHF_WRITE
;
656 if (sect
->flags
& SEC_CODE
)
657 hdr
[indx
].sh_flags
|= SHF_EXECINSTR
;
662 /* Create a new bfd section from an ELF program header.
664 Since program segments have no names, we generate a synthetic name
665 of the form segment<NUM>, where NUM is generally the index in the
666 program header table. For segments that are split (see below) we
667 generate the names segment<NUM>a and segment<NUM>b.
669 Note that some program segments may have a file size that is different than
670 (less than) the memory size. All this means is that at execution the
671 system must allocate the amount of memory specified by the memory size,
672 but only initialize it with the first "file size" bytes read from the
673 file. This would occur for example, with program segments consisting
674 of combined data+bss.
676 To handle the above situation, this routine generates TWO bfd sections
677 for the single program segment. The first has the length specified by
678 the file size of the segment, and the second has the length specified
679 by the difference between the two sizes. In effect, the segment is split
680 into it's initialized and uninitialized parts.
685 DEFUN(bfd_section_from_phdr
, (abfd
, hdr
, index
),
687 Elf_Internal_Phdr
*hdr AND
695 split
= ((hdr
-> p_memsz
> 0) &&
696 (hdr
-> p_filesz
> 0) &&
697 (hdr
-> p_memsz
> hdr
-> p_filesz
));
698 sprintf (namebuf
, split
? "segment%da" : "segment%d", index
);
699 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
700 strcpy (name
, namebuf
);
701 newsect
= bfd_make_section (abfd
, name
);
702 newsect
-> vma
= hdr
-> p_vaddr
;
703 newsect
-> _raw_size
= hdr
-> p_filesz
;
704 newsect
-> filepos
= hdr
-> p_offset
;
705 newsect
-> flags
|= SEC_HAS_CONTENTS
;
706 if (hdr
-> p_type
== PT_LOAD
)
708 newsect
-> flags
|= SEC_ALLOC
;
709 newsect
-> flags
|= SEC_LOAD
;
710 if (hdr
-> p_flags
& PF_X
)
712 /* FIXME: all we known is that it has execute PERMISSION,
714 newsect
-> flags
|= SEC_CODE
;
717 if (!(hdr
-> p_flags
& PF_W
))
719 newsect
-> flags
|= SEC_READONLY
;
724 sprintf (namebuf
, "segment%db", index
);
725 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
726 strcpy (name
, namebuf
);
727 newsect
= bfd_make_section (abfd
, name
);
728 newsect
-> vma
= hdr
-> p_vaddr
+ hdr
-> p_filesz
;
729 newsect
-> _raw_size
= hdr
-> p_memsz
- hdr
-> p_filesz
;
730 if (hdr
-> p_type
== PT_LOAD
)
732 newsect
-> flags
|= SEC_ALLOC
;
733 if (hdr
-> p_flags
& PF_X
)
734 newsect
-> flags
|= SEC_CODE
;
736 if (!(hdr
-> p_flags
& PF_W
))
737 newsect
-> flags
|= SEC_READONLY
;
746 DEFUN(bfd_prstatus
,(abfd
, descdata
, descsz
, filepos
),
753 prstatus_t
*status
= (prstatus_t
*)0;
755 if (descsz
== sizeof (prstatus_t
))
757 newsect
= bfd_make_section (abfd
, ".reg");
758 newsect
-> _raw_size
= sizeof (status
->pr_reg
);
759 newsect
-> filepos
= filepos
+ (long) &status
->pr_reg
;
760 newsect
-> flags
= SEC_ALLOC
| SEC_HAS_CONTENTS
;
761 newsect
-> alignment_power
= 2;
762 if ((core_prstatus (abfd
) = bfd_alloc (abfd
, descsz
)) != NULL
)
764 memcpy (core_prstatus (abfd
), descdata
, descsz
);
769 /* Stash a copy of the prpsinfo structure away for future use. */
772 DEFUN(bfd_prpsinfo
,(abfd
, descdata
, descsz
, filepos
),
780 if (descsz
== sizeof (prpsinfo_t
))
782 if ((core_prpsinfo (abfd
) = bfd_alloc (abfd
, descsz
)) != NULL
)
784 memcpy (core_prpsinfo (abfd
), descdata
, descsz
);
790 DEFUN(bfd_fpregset
,(abfd
, descdata
, descsz
, filepos
),
798 newsect
= bfd_make_section (abfd
, ".reg2");
799 newsect
-> _raw_size
= descsz
;
800 newsect
-> filepos
= filepos
;
801 newsect
-> flags
= SEC_ALLOC
| SEC_HAS_CONTENTS
;
802 newsect
-> alignment_power
= 2;
805 #endif /* HAVE_PROCFS */
807 /* Return a pointer to the args (including the command name) that were
808 seen by the program that generated the core dump. Note that for
809 some reason, a spurious space is tacked onto the end of the args
810 in some (at least one anyway) implementations, so strip it off if
814 DEFUN(elf_core_file_failing_command
, (abfd
),
818 if (core_prpsinfo (abfd
))
820 prpsinfo_t
*p
= core_prpsinfo (abfd
);
821 char *scan
= p
-> pr_psargs
;
824 if ((scan
> p
-> pr_psargs
) && (*scan
== ' '))
828 return (p
-> pr_psargs
);
834 /* Return the number of the signal that caused the core dump. Presumably,
835 since we have a core file, we got a signal of some kind, so don't bother
836 checking the other process status fields, just return the signal number.
840 DEFUN(elf_core_file_failing_signal
, (abfd
),
844 if (core_prstatus (abfd
))
846 return (((prstatus_t
*)(core_prstatus (abfd
))) -> pr_cursig
);
852 /* Check to see if the core file could reasonably be expected to have
853 come for the current executable file. Note that by default we return
854 true unless we find something that indicates that there might be a
859 DEFUN(elf_core_file_matches_executable_p
, (core_bfd
, exec_bfd
),
868 /* First, xvecs must match since both are ELF files for the same target. */
870 if (core_bfd
->xvec
!= exec_bfd
->xvec
)
872 bfd_error
= system_call_error
;
878 /* If no prpsinfo, just return true. Otherwise, grab the last component
879 of the exec'd pathname from the prpsinfo. */
881 if (core_prpsinfo (core_bfd
))
883 corename
= (((struct prpsinfo
*) core_prpsinfo (core_bfd
)) -> pr_fname
);
890 /* Find the last component of the executable pathname. */
892 if ((execname
= strrchr (exec_bfd
-> filename
, '/')) != NULL
)
898 execname
= (char *) exec_bfd
-> filename
;
901 /* See if they match */
903 return (strcmp (execname
, corename
) ? false : true);
909 #endif /* HAVE_PROCFS */
912 /* ELF core files contain a segment of type PT_NOTE, that holds much of
913 the information that would normally be available from the /proc interface
914 for the process, at the time the process dumped core. Currently this
915 includes copies of the prstatus, prpsinfo, and fpregset structures.
917 Since these structures are potentially machine dependent in size and
918 ordering, bfd provides two levels of support for them. The first level,
919 available on all machines since it does not require that the host
920 have /proc support or the relevant include files, is to create a bfd
921 section for each of the prstatus, prpsinfo, and fpregset structures,
922 without any interpretation of their contents. With just this support,
923 the bfd client will have to interpret the structures itself. Even with
924 /proc support, it might want these full structures for it's own reasons.
926 In the second level of support, where HAVE_PROCFS is defined, bfd will
927 pick apart the structures to gather some additional information that
928 clients may want, such as the general register set, the name of the
929 exec'ed file and its arguments, the signal (if any) that caused the
935 DEFUN(elf_corefile_note
, (abfd
, hdr
),
937 Elf_Internal_Phdr
*hdr
)
939 Elf_External_Note
*x_note_p
; /* Elf note, external form */
940 Elf_Internal_Note i_note
; /* Elf note, internal form */
941 char *buf
= NULL
; /* Entire note segment contents */
942 char *namedata
; /* Name portion of the note */
943 char *descdata
; /* Descriptor portion of the note */
944 char *sectname
; /* Name to use for new section */
945 long filepos
; /* File offset to descriptor data */
948 if (hdr
-> p_filesz
> 0
949 && (buf
= (char *) bfd_xmalloc (hdr
-> p_filesz
)) != NULL
950 && bfd_seek (abfd
, hdr
-> p_offset
, SEEK_SET
) != -1L
951 && bfd_read ((PTR
) buf
, hdr
-> p_filesz
, 1, abfd
) == hdr
-> p_filesz
)
953 x_note_p
= (Elf_External_Note
*) buf
;
954 while ((char *) x_note_p
< (buf
+ hdr
-> p_filesz
))
956 i_note
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_note_p
-> namesz
);
957 i_note
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_note_p
-> descsz
);
958 i_note
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) x_note_p
-> type
);
959 namedata
= x_note_p
-> name
;
960 descdata
= namedata
+ BFD_ALIGN (i_note
.namesz
, 4);
961 filepos
= hdr
-> p_offset
+ (descdata
- buf
);
962 switch (i_note
.type
) {
964 /* process descdata as prstatus info */
965 bfd_prstatus (abfd
, descdata
, i_note
.descsz
, filepos
);
966 sectname
= ".prstatus";
969 /* process descdata as fpregset info */
970 bfd_fpregset (abfd
, descdata
, i_note
.descsz
, filepos
);
971 sectname
= ".fpregset";
974 /* process descdata as prpsinfo */
975 bfd_prpsinfo (abfd
, descdata
, i_note
.descsz
, filepos
);
976 sectname
= ".prpsinfo";
979 /* Unknown descriptor, just ignore it. */
983 if (sectname
!= NULL
)
985 newsect
= bfd_make_section (abfd
, sectname
);
986 newsect
-> _raw_size
= i_note
.descsz
;
987 newsect
-> filepos
= filepos
;
988 newsect
-> flags
= SEC_ALLOC
| SEC_HAS_CONTENTS
;
989 newsect
-> alignment_power
= 2;
991 x_note_p
= (Elf_External_Note
*)
992 (descdata
+ BFD_ALIGN (i_note
.descsz
, 4));
1004 /* Read a specified number of bytes at a specified offset in an ELF
1005 file, into a newly allocated buffer, and return a pointer to the
1009 DEFUN(elf_read
, (abfd
, offset
, size
),
1016 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
1018 bfd_error
= no_memory
;
1021 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
1023 bfd_error
= system_call_error
;
1026 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
1028 bfd_error
= system_call_error
;
1034 /* Begin processing a given object.
1036 First we validate the file by reading in the ELF header and checking
1042 DEFUN (elf_object_p
, (abfd
), bfd
*abfd
)
1044 Elf_External_Ehdr x_ehdr
; /* Elf file header, external form */
1045 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
1046 Elf_External_Shdr x_shdr
; /* Section header table entry, external form */
1047 Elf_Internal_Shdr
*i_shdrp
; /* Section header table, internal form */
1049 char *shstrtab
; /* Internal copy of section header stringtab */
1050 Elf_Off offset
; /* Temp place to stash file offsets */
1052 /* Read in the ELF header in external format. */
1054 if (bfd_read ((PTR
) &x_ehdr
, sizeof (x_ehdr
), 1, abfd
) != sizeof (x_ehdr
))
1056 bfd_error
= system_call_error
;
1060 /* Now check to see if we have a valid ELF file, and one that BFD can
1061 make use of. The magic number must match, the address size ('class')
1062 and byte-swapping must match our XVEC entry, and it must have a
1063 section header table (FIXME: See comments re sections at top of this
1066 if (x_ehdr
.e_ident
[EI_MAG0
] != ELFMAG0
||
1067 x_ehdr
.e_ident
[EI_MAG1
] != ELFMAG1
||
1068 x_ehdr
.e_ident
[EI_MAG2
] != ELFMAG2
||
1069 x_ehdr
.e_ident
[EI_MAG3
] != ELFMAG3
)
1072 bfd_error
= wrong_format
;
1076 /* FIXME, Check EI_VERSION here ! */
1078 switch (x_ehdr
.e_ident
[EI_CLASS
])
1080 case ELFCLASSNONE
: /* address size not specified */
1081 goto wrong
; /* No support if can't tell address size */
1082 case ELFCLASS32
: /* 32-bit addresses */
1084 case ELFCLASS64
: /* 64-bit addresses */
1085 goto wrong
; /* FIXME: 64 bits not yet supported */
1087 goto wrong
; /* No support if unknown address class */
1090 /* Switch xvec to match the specified byte order. */
1091 switch (x_ehdr
.e_ident
[EI_DATA
])
1093 case ELFDATA2MSB
: /* Big-endian */
1094 if (!abfd
->xvec
->header_byteorder_big_p
)
1097 case ELFDATA2LSB
: /* Little-endian */
1098 if (abfd
->xvec
->header_byteorder_big_p
)
1101 case ELFDATANONE
: /* No data encoding specified */
1102 default: /* Unknown data encoding specified */
1106 /* Allocate an instance of the elf_obj_tdata structure and hook it up to
1107 the tdata pointer in the bfd. */
1109 if (NULL
== (elf_tdata (abfd
) = (struct elf_obj_tdata
*)
1110 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
))))
1112 bfd_error
= no_memory
;
1116 /* FIXME: Any `wrong' exits below here will leak memory (tdata). */
1118 /* Now that we know the byte order, swap in the rest of the header */
1119 i_ehdrp
= elf_elfheader (abfd
);
1120 elf_swap_ehdr_in (abfd
, &x_ehdr
, i_ehdrp
);
1122 /* If there is no section header table, we're hosed. */
1123 if (i_ehdrp
->e_shoff
== 0)
1126 if (i_ehdrp
->e_type
== ET_EXEC
|| i_ehdrp
->e_type
== ET_DYN
)
1127 abfd
-> flags
|= EXEC_P
;
1129 switch (i_ehdrp
->e_machine
)
1132 case EM_M32
: /* or should this be bfd_arch_obscure? */
1133 bfd_default_set_arch_mach(abfd
, bfd_arch_unknown
, 0);
1136 bfd_default_set_arch_mach(abfd
, bfd_arch_sparc
, 0);
1139 bfd_default_set_arch_mach(abfd
, bfd_arch_i386
, 0);
1142 bfd_default_set_arch_mach(abfd
, bfd_arch_m68k
, 0);
1145 bfd_default_set_arch_mach(abfd
, bfd_arch_m88k
, 0);
1148 bfd_default_set_arch_mach(abfd
, bfd_arch_i860
, 0);
1151 bfd_default_set_arch_mach(abfd
, bfd_arch_mips
, 0);
1157 /* Allocate space for a copy of the section header table in
1158 internal form, seek to the section header table in the file,
1159 read it in, and convert it to internal form. As a simple sanity
1160 check, verify that the what BFD thinks is the size of each section
1161 header table entry actually matches the size recorded in the file. */
1163 if (i_ehdrp
->e_shentsize
!= sizeof (x_shdr
))
1165 i_shdrp
= (Elf_Internal_Shdr
*)
1166 bfd_alloc (abfd
, sizeof (*i_shdrp
) * i_ehdrp
->e_shnum
);
1169 bfd_error
= no_memory
;
1172 if (bfd_seek (abfd
, i_ehdrp
->e_shoff
, SEEK_SET
) == -1)
1174 bfd_error
= system_call_error
;
1177 for (shindex
= 0; shindex
< i_ehdrp
->e_shnum
; shindex
++)
1179 if (bfd_read ((PTR
) &x_shdr
, sizeof x_shdr
, 1, abfd
)
1182 bfd_error
= system_call_error
;
1185 elf_swap_shdr_in (abfd
, &x_shdr
, i_shdrp
+ shindex
);
1188 elf_elfsections (abfd
) = i_shdrp
;
1190 /* Read in the string table containing the names of the sections. We
1191 will need the base pointer to this table later. */
1192 /* We read this inline now, so that we don't have to go through
1193 bfd_section_from_shdr with it (since this particular strtab is
1194 used to find all of the ELF section names.) */
1196 shstrtab
= elf_get_str_section (abfd
, i_ehdrp
->e_shstrndx
);
1200 /* Once all of the section headers have been read and converted, we
1201 can start processing them. Note that the first section header is
1202 a dummy placeholder entry, so we ignore it.
1204 We also watch for the symbol table section and remember the file
1205 offset and section size for both the symbol table section and the
1206 associated string table section. */
1208 for (shindex
= 1; shindex
< i_ehdrp
->e_shnum
; shindex
++)
1210 bfd_section_from_shdr (abfd
, shindex
);
1213 /* Remember the entry point specified in the ELF file header. */
1215 bfd_get_start_address (abfd
) = i_ehdrp
->e_entry
;
1217 return (abfd
->xvec
);
1220 /* Core files are simply standard ELF formatted files that partition
1221 the file using the execution view of the file (program header table)
1222 rather than the linking view. In fact, there is no section header
1223 table in a core file.
1225 The process status information (including the contents of the general
1226 register set) and the floating point register set are stored in a
1227 segment of type PT_NOTE. We handcraft a couple of extra bfd sections
1228 that allow standard bfd access to the general registers (.reg) and the
1229 floating point registers (.reg2).
1234 DEFUN (elf_core_file_p
, (abfd
), bfd
*abfd
)
1236 Elf_External_Ehdr x_ehdr
; /* Elf file header, external form */
1237 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
1238 Elf_External_Phdr x_phdr
; /* Program header table entry, external form */
1239 Elf_Internal_Phdr
*i_phdrp
; /* Program header table, internal form */
1240 unsigned int phindex
;
1242 /* Read in the ELF header in external format. */
1244 if (bfd_read ((PTR
) &x_ehdr
, sizeof (x_ehdr
), 1, abfd
) != sizeof (x_ehdr
))
1246 bfd_error
= system_call_error
;
1250 /* Now check to see if we have a valid ELF file, and one that BFD can
1251 make use of. The magic number must match, the address size ('class')
1252 and byte-swapping must match our XVEC entry, and it must have a
1253 program header table (FIXME: See comments re segments at top of this
1256 if (x_ehdr
.e_ident
[EI_MAG0
] != ELFMAG0
||
1257 x_ehdr
.e_ident
[EI_MAG1
] != ELFMAG1
||
1258 x_ehdr
.e_ident
[EI_MAG2
] != ELFMAG2
||
1259 x_ehdr
.e_ident
[EI_MAG3
] != ELFMAG3
)
1262 bfd_error
= wrong_format
;
1266 /* FIXME, Check EI_VERSION here ! */
1268 switch (x_ehdr
.e_ident
[EI_CLASS
])
1270 case ELFCLASSNONE
: /* address size not specified */
1271 goto wrong
; /* No support if can't tell address size */
1272 case ELFCLASS32
: /* 32-bit addresses */
1274 case ELFCLASS64
: /* 64-bit addresses */
1275 goto wrong
; /* FIXME: 64 bits not yet supported */
1277 goto wrong
; /* No support if unknown address class */
1280 /* Switch xvec to match the specified byte order. */
1281 switch (x_ehdr
.e_ident
[EI_DATA
])
1283 case ELFDATA2MSB
: /* Big-endian */
1284 abfd
->xvec
= &elf_big_vec
;
1286 case ELFDATA2LSB
: /* Little-endian */
1287 abfd
->xvec
= &elf_little_vec
;
1289 case ELFDATANONE
: /* No data encoding specified */
1290 default: /* Unknown data encoding specified */
1294 /* Allocate an instance of the elf_obj_tdata structure and hook it up to
1295 the tdata pointer in the bfd. */
1298 (struct elf_obj_tdata
*) bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
1299 if (elf_tdata (abfd
) == NULL
)
1301 bfd_error
= no_memory
;
1305 /* FIXME, `wrong' returns from this point onward, leak memory. */
1307 /* Now that we know the byte order, swap in the rest of the header */
1308 i_ehdrp
= elf_elfheader (abfd
);
1309 elf_swap_ehdr_in (abfd
, &x_ehdr
, i_ehdrp
);
1311 /* If there is no program header, or the type is not a core file, then
1313 if (i_ehdrp
->e_phoff
== 0 || i_ehdrp
->e_type
!= ET_CORE
)
1316 /* Allocate space for a copy of the program header table in
1317 internal form, seek to the program header table in the file,
1318 read it in, and convert it to internal form. As a simple sanity
1319 check, verify that the what BFD thinks is the size of each program
1320 header table entry actually matches the size recorded in the file. */
1322 if (i_ehdrp
->e_phentsize
!= sizeof (x_phdr
))
1324 i_phdrp
= (Elf_Internal_Phdr
*)
1325 bfd_alloc (abfd
, sizeof (*i_phdrp
) * i_ehdrp
->e_phnum
);
1328 bfd_error
= no_memory
;
1331 if (bfd_seek (abfd
, i_ehdrp
->e_phoff
, SEEK_SET
) == -1)
1333 bfd_error
= system_call_error
;
1336 for (phindex
= 0; phindex
< i_ehdrp
->e_phnum
; phindex
++)
1338 if (bfd_read ((PTR
) &x_phdr
, sizeof (x_phdr
), 1, abfd
)
1341 bfd_error
= system_call_error
;
1344 elf_swap_phdr_in (abfd
, &x_phdr
, i_phdrp
+ phindex
);
1347 /* Once all of the program headers have been read and converted, we
1348 can start processing them. */
1350 for (phindex
= 0; phindex
< i_ehdrp
->e_phnum
; phindex
++)
1352 bfd_section_from_phdr (abfd
, i_phdrp
+ phindex
, phindex
);
1353 if ((i_phdrp
+ phindex
) -> p_type
== PT_NOTE
)
1355 elf_corefile_note (abfd
, i_phdrp
+ phindex
);
1359 /* Remember the entry point specified in the ELF file header. */
1361 bfd_get_start_address (abfd
) = i_ehdrp
->e_entry
;
1363 return (abfd
->xvec
);
1367 DEFUN (elf_mkobject
, (abfd
), bfd
*abfd
)
1369 /* this just does initialization */
1370 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
1371 elf_tdata(abfd
) = (struct elf_obj_tdata
*)
1372 bfd_zalloc (abfd
, sizeof(struct elf_obj_tdata
));
1373 if (elf_tdata(abfd
) == 0) {
1374 bfd_error
= no_memory
;
1377 /* since everything is done at close time, do we need any
1384 Create ELF output from BFD sections.
1386 Essentially, just create the section header and forget about the program
1391 /* lacking nested functions and nested types, set up for mapping over
1392 BFD sections to produce ELF sections */
1395 Elf_Internal_Ehdr
*i_ehdr
;
1396 Elf_Internal_Shdr
*i_shdrp
;
1397 struct strtab
*shstrtab
;
1404 DEFUN (elf_make_sections
, (abfd
, asect
, obj
),
1409 elf_sect_thunk
*thunk
= (elf_sect_thunk
*)obj
;
1410 /* most of what is in bfd_shdr_from_section goes in here... */
1411 /* and all of these sections generate at *least* one ELF section. */
1415 /* check if we're making a PROGBITS section... */
1416 /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */
1417 /* this was too strict... what *do* we want to check here? */
1420 Elf_Internal_Shdr
*this_hdr
;
1421 this_section
= elf_section_from_bfd_section (abfd
, asect
);
1422 this_hdr
= &thunk
->i_shdrp
[this_section
];
1424 this_hdr
->sh_addr
= asect
->vma
;
1425 this_hdr
->sh_size
= asect
->_raw_size
;
1426 /* contents already set by elf_set_section_contents */
1428 if (asect
->flags
& SEC_RELOC
)
1430 /* emit a reloc section, and thus strtab and symtab... */
1431 Elf_Internal_Shdr
*rela_hdr
;
1432 Elf_Internal_Shdr
*symtab_hdr
;
1433 Elf_Internal_Shdr
*symstrtab_hdr
;
1434 Elf_External_Rela
*outbound_relocs
;
1435 Elf_External_Sym
*outbound_syms
;
1437 int symstrtab_section
;
1439 symtab_hdr
= &thunk
->i_shdrp
[thunk
->symtab_section
];
1441 if (thunk
->symtab_section
== this_section
+ 1)
1442 rela_section
= thunk
->symtab_section
+ 2; /* symtab + symstrtab */
1444 rela_section
= this_section
+ 1;
1445 rela_hdr
= &thunk
->i_shdrp
[rela_section
];
1446 rela_hdr
->sh_type
= SHT_RELA
;
1447 rela_hdr
->sh_link
= thunk
->symtab_section
;
1448 rela_hdr
->sh_info
= this_section
;
1449 rela_hdr
->sh_entsize
= sizeof (Elf_External_Rela
);
1450 /* orelocation has the data, reloc_count has the count... */
1451 rela_hdr
->sh_size
= rela_hdr
->sh_entsize
* asect
->reloc_count
;
1452 outbound_relocs
= (Elf_External_Rela
*)
1453 bfd_alloc(abfd
, asect
->reloc_count
* sizeof(Elf_External_Rela
));
1454 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
1456 Elf_Internal_Rela dst
;
1458 Elf_External_Rela
*src
;
1460 ptr
= asect
->orelocation
[idx
];
1461 src
= outbound_relocs
+ idx
;
1462 if (asect
->flags
& SEC_RELOC
)
1463 dst
.r_offset
= ptr
->address
- asect
->vma
;
1465 dst
.r_offset
= ptr
->address
;
1467 dst
.r_info
= ELF_R_INFO(1 /*ptr->sym_ptr_ptr*/, /* needs index into symtab (FIXME) */
1470 dst
.r_addend
= ptr
->addend
;
1471 elf_swap_reloca_out(abfd
, &dst
, src
);
1473 rela_hdr
->contents
= (void*)outbound_relocs
;
1479 DEFUN (elf_fake_sections
, (abfd
, asect
, obj
),
1484 elf_sect_thunk
*thunk
= (elf_sect_thunk
*)obj
;
1485 /* most of what is in bfd_shdr_from_section goes in here... */
1486 /* and all of these sections generate at *least* one ELF section. */
1490 /* check if we're making a PROGBITS section... */
1491 /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */
1492 /* this was too strict... what *do* we want to check here? */
1495 Elf_Internal_Shdr
*this_hdr
;
1496 this_section
= thunk
->i_ehdr
->e_shnum
++;
1497 this_hdr
= &thunk
->i_shdrp
[this_section
];
1499 bfd_add_to_strtab (abfd
, thunk
->shstrtab
, asect
->name
);
1500 /* we need to log the type *now* so that elf_section_from_bfd_section
1501 can find us... have to set rawdata too. */
1502 this_hdr
->rawdata
= (void*)asect
;
1503 if ((asect
->flags
& SEC_ALLOC
) && (asect
->flags
& SEC_LOAD
))
1504 this_hdr
->sh_type
= SHT_PROGBITS
;
1506 /* what *do* we put here? */
1507 this_hdr
->sh_type
= SHT_PROGBITS
;
1510 if (asect
->flags
& SEC_RELOC
)
1512 /* emit a reloc section, and thus strtab and symtab... */
1513 Elf_Internal_Shdr
*rela_hdr
;
1514 Elf_Internal_Shdr
*symtab_hdr
;
1515 Elf_Internal_Shdr
*symstrtab_hdr
;
1516 Elf_External_Rela
*outbound_relocs
;
1517 Elf_External_Sym
*outbound_syms
;
1519 int symstrtab_section
;
1521 /* note that only one symtab is used, so just remember it
1523 if (! thunk
->symtab_section
)
1525 thunk
->symtab_section
= thunk
->i_ehdr
->e_shnum
++;
1526 symtab_hdr
= &thunk
->i_shdrp
[thunk
->symtab_section
];
1527 symtab_hdr
->sh_name
=
1528 bfd_add_to_strtab (abfd
, thunk
->shstrtab
, ".symtab");
1529 symtab_hdr
->sh_type
= SHT_SYMTAB
;
1530 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
1532 symstrtab_section
= thunk
->i_ehdr
->e_shnum
++;
1533 BFD_ASSERT(symstrtab_section
== thunk
->symtab_section
+1);
1534 symstrtab_hdr
= &thunk
->i_shdrp
[symstrtab_section
];
1535 symtab_hdr
->sh_link
= symstrtab_section
;
1536 symstrtab_hdr
->sh_name
=
1537 bfd_add_to_strtab (abfd
, thunk
->shstrtab
, ".strtab");
1538 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
1540 symtab_hdr
->contents
= 0;
1541 symstrtab_hdr
->contents
= 0;
1542 symstrtab_hdr
->sh_size
= 0;
1545 symtab_hdr
= &thunk
->i_shdrp
[thunk
->symtab_section
];
1547 rela_section
= thunk
->i_ehdr
->e_shnum
++;
1548 rela_hdr
= &thunk
->i_shdrp
[rela_section
];
1550 bfd_add_2_to_strtab (abfd
, thunk
->shstrtab
, ".rela", asect
->name
);
1551 rela_hdr
->sh_type
= SHT_RELA
;
1552 rela_hdr
->sh_link
= thunk
->symtab_section
;
1553 rela_hdr
->sh_info
= this_section
;
1554 rela_hdr
->sh_entsize
= sizeof (Elf_External_Rela
);
1561 DEFUN (elf_compute_section_file_positions
, (abfd
), bfd
*abfd
)
1563 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
1564 Elf_Internal_Shdr
*i_shdrp
; /* Section header table, internal form */
1565 struct strtab
*shstrtab
;
1566 int count
, maxsections
;
1570 if (! elf_shstrtab (abfd
)) {
1571 i_ehdrp
= elf_elfheader (abfd
); /* build new header in tdata memory */
1572 shstrtab
= bfd_new_strtab(abfd
);
1574 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
1575 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
1576 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
1577 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
1579 i_ehdrp
->e_ident
[EI_CLASS
] = ELFCLASS32
; /* FIXME: find out from bfd */
1580 i_ehdrp
->e_ident
[EI_DATA
] =
1581 abfd
->xvec
->byteorder_big_p
? ELFDATA2MSB
: ELFDATA2LSB
;
1582 i_ehdrp
->e_ident
[EI_VERSION
] = EV_CURRENT
;
1584 for(count
= EI_PAD
; count
< EI_NIDENT
; count
++)
1585 i_ehdrp
->e_ident
[count
] = 0;
1587 i_ehdrp
->e_type
= (abfd
->flags
& EXEC_P
)? ET_EXEC
: ET_REL
;
1588 switch(bfd_get_arch(abfd
))
1590 case bfd_arch_unknown
:
1591 i_ehdrp
->e_machine
= EM_NONE
;
1593 case bfd_arch_sparc
:
1594 i_ehdrp
->e_machine
= EM_SPARC
;
1597 i_ehdrp
->e_machine
= EM_386
;
1600 i_ehdrp
->e_machine
= EM_68K
;
1603 i_ehdrp
->e_machine
= EM_88K
;
1606 i_ehdrp
->e_machine
= EM_860
;
1608 case bfd_arch_mips
: /* MIPS Rxxxx */
1609 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
1611 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
1613 i_ehdrp
->e_machine
= EM_NONE
;
1615 i_ehdrp
->e_version
= EV_CURRENT
;
1616 i_ehdrp
->e_ehsize
= sizeof(Elf_External_Ehdr
);
1618 /* no program header, for now. */
1619 i_ehdrp
->e_phoff
= 0;
1620 i_ehdrp
->e_phentsize
= 0;
1621 i_ehdrp
->e_phnum
= 0;
1623 /* each bfd section is section header entry */
1624 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
1625 i_ehdrp
->e_shentsize
= sizeof (Elf_External_Shdr
);
1627 /* figure at most each section can have a rel, strtab, symtab */
1628 maxsections
= 4*bfd_count_sections(abfd
)+2;
1630 i_ehdrp
->e_shoff
= i_ehdrp
->e_ehsize
;
1632 /* and we'll just have to fix up the offsets later. */
1633 /* outbase += i_ehdr.e_shentsize * i_ehdr.e_shnum; */
1635 i_shdrp
= (Elf_Internal_Shdr
*)
1636 bfd_alloc (abfd
, sizeof (*i_shdrp
) * maxsections
);
1639 bfd_error
= no_memory
;
1642 for (count
=0; count
< maxsections
; count
++)
1644 i_shdrp
[count
].rawdata
= 0;
1645 i_shdrp
[count
].contents
= 0;
1649 i_shdrp
[0].sh_name
= 0;
1650 i_shdrp
[0].sh_type
= SHT_NULL
;
1651 i_shdrp
[0].sh_flags
= 0;
1652 i_shdrp
[0].sh_addr
= 0;
1653 i_shdrp
[0].sh_offset
= 0;
1654 i_shdrp
[0].sh_size
= 0;
1655 i_shdrp
[0].sh_link
= SHN_UNDEF
;
1656 i_shdrp
[0].sh_info
= 0;
1657 i_shdrp
[0].sh_addralign
= 0;
1658 i_shdrp
[0].sh_entsize
= 0;
1660 i_ehdrp
->e_shnum
= 1;
1662 elf_elfsections (abfd
) = i_shdrp
;
1663 elf_shstrtab (abfd
) = shstrtab
;
1665 est
.i_ehdr
= elf_elfheader(abfd
);
1666 est
.i_shdrp
= elf_elfsections(abfd
);
1667 est
.shstrtab
= elf_shstrtab(abfd
);
1668 est
.symtab_section
= 0; /* elf_fake_sections fils it in */
1670 bfd_map_over_sections(abfd
, elf_fake_sections
, &est
);
1671 elf_onesymtab (abfd
) = est
.symtab_section
;
1676 DEFUN (elf_write_object_contents
, (abfd
), bfd
*abfd
)
1678 Elf_External_Ehdr x_ehdr
; /* Elf file header, external form */
1679 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
1680 Elf_External_Phdr
*x_phdrp
; /* Program header table, external form */
1681 Elf_Internal_Phdr
*i_phdrp
; /* Program header table, internal form */
1682 Elf_External_Shdr
*x_shdrp
; /* Section header table, external form */
1683 Elf_Internal_Shdr
*i_shdrp
; /* Section header table, internal form */
1690 struct strtab
*shstrtab
;
1692 if(abfd
->output_has_begun
== false)
1693 elf_compute_section_file_positions(abfd
);
1695 i_ehdrp
= elf_elfheader (abfd
);
1696 i_shdrp
= elf_elfsections (abfd
);
1697 shstrtab
= elf_shstrtab (abfd
);
1699 est
.i_ehdr
= i_ehdrp
;
1700 est
.i_shdrp
= i_shdrp
;
1701 est
.shstrtab
= shstrtab
;
1702 est
.symtab_section
= elf_onesymtab (abfd
); /* filled in by elf_fake */
1704 bfd_map_over_sections(abfd
, elf_make_sections
, &est
);
1706 /* dump out the one symtab */
1708 int symcount
= bfd_get_symcount (abfd
);
1709 asymbol
** syms
= bfd_get_outsymbols (abfd
);
1710 struct strtab
* stt
= bfd_new_strtab (abfd
);
1711 Elf_Internal_Shdr
*symtab_hdr
;
1712 Elf_Internal_Shdr
*symstrtab_hdr
;
1713 int symstrtab_section
;
1714 Elf_External_Sym
*outbound_syms
;
1717 symtab_hdr
= &i_shdrp
[est
.symtab_section
];
1718 symtab_hdr
->sh_type
= SHT_SYMTAB
;
1719 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
1720 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* symcount
;
1722 /* see assert in elf_fake_sections that supports this: */
1723 symstrtab_section
= est
.symtab_section
+1;
1724 symstrtab_hdr
= &i_shdrp
[symstrtab_section
];
1725 symtab_hdr
->sh_link
= symstrtab_section
;
1726 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
1728 outbound_syms
= (Elf_External_Sym
*)
1729 bfd_alloc(abfd
, (1+symcount
) * sizeof(Elf_External_Sym
));
1730 /* now generate the data (for "contents") */
1731 for (idx
= 0; idx
< symcount
; idx
++)
1733 Elf_Internal_Sym sym
;
1734 sym
.st_name
= bfd_add_to_strtab (abfd
, stt
, syms
[idx
]->name
);
1735 sym
.st_value
= syms
[idx
]->value
;
1736 sym
.st_size
= 0; /* we should recover this (FIXME) */
1737 if (syms
[idx
]->flags
& BSF_WEAK
)
1738 sym
.st_info
= ELF_ST_INFO(STB_WEAK
, STT_OBJECT
);
1739 else if (syms
[idx
]->flags
& BSF_LOCAL
)
1740 sym
.st_info
= ELF_ST_INFO(STB_LOCAL
, STT_OBJECT
);
1741 else if (syms
[idx
]->flags
& BSF_GLOBAL
)
1742 sym
.st_info
= ELF_ST_INFO(STB_GLOBAL
, STT_OBJECT
);
1743 else if (syms
[idx
]->flags
& BSF_SECTION_SYM
)
1744 sym
.st_info
= ELF_ST_INFO(STB_LOCAL
, STT_SECTION
);
1745 else if (syms
[idx
]->flags
& BSF_FILE
)
1746 sym
.st_info
= ELF_ST_INFO(STB_LOCAL
, STT_FILE
);
1749 if (syms
[idx
]->section
)
1751 elf_section_from_bfd_section(abfd
,
1752 syms
[idx
]->section
->output_section
);
1754 sym
.st_shndx
= SHN_UNDEF
;
1756 elf_swap_symbol_out (abfd
, &sym
, outbound_syms
+idx
+1);
1759 /* fill in 0th symbol */
1760 Elf_Internal_Sym sym
;
1766 sym
.st_shndx
= SHN_UNDEF
;
1767 elf_swap_symbol_out (abfd
, &sym
, outbound_syms
);
1769 symtab_hdr
->contents
= (void*)outbound_syms
;
1770 symstrtab_hdr
->contents
= (void*)stt
->tab
;
1771 symstrtab_hdr
->sh_size
= stt
->length
;
1774 /* put the strtab out too... */
1776 Elf_Internal_Shdr
*this_hdr
;
1779 this_section
= i_ehdrp
->e_shnum
++;
1780 i_ehdrp
->e_shstrndx
= this_section
;
1781 this_hdr
= &i_shdrp
[this_section
];
1782 this_hdr
->sh_name
= bfd_add_to_strtab (abfd
, shstrtab
, ".shstrtab");
1783 this_hdr
->sh_size
= shstrtab
->length
;
1784 this_hdr
->contents
= (void*)shstrtab
->tab
;
1787 outbase
= i_ehdrp
->e_ehsize
;
1789 /* swap the header before spitting it out... */
1790 elf_swap_ehdr_out (abfd
, i_ehdrp
, &x_ehdr
);
1791 bfd_seek (abfd
, 0L, SEEK_SET
);
1792 bfd_write ((PTR
) &x_ehdr
, sizeof(x_ehdr
), 1, abfd
);
1794 outbase
+= i_ehdrp
->e_shentsize
* i_ehdrp
->e_shnum
;
1796 /* now we fix up the offsets... */
1797 for (count
= 0; count
< i_ehdrp
->e_shnum
; count
++)
1799 i_shdrp
[count
].sh_offset
= outbase
;
1800 outbase
+= i_shdrp
[count
].sh_size
;
1803 /* at this point we've concocted all the ELF sections... */
1804 x_shdrp
= (Elf_External_Shdr
*)
1805 bfd_alloc (abfd
, sizeof (*x_shdrp
) * (i_ehdrp
->e_shnum
));
1808 bfd_error
= no_memory
;
1812 for (count
= 0; count
< i_ehdrp
->e_shnum
; count
++)
1814 elf_swap_shdr_out (abfd
, i_shdrp
+count
, x_shdrp
+count
);
1816 bfd_write ((PTR
) x_shdrp
, sizeof(*x_shdrp
), i_ehdrp
->e_shnum
, abfd
);
1817 /* need to dump the string table too... */
1819 /* after writing the headers, we need to write the sections too... */
1820 nsect
= abfd
->sections
;
1821 for (count
= 0; count
< i_ehdrp
->e_shnum
; count
++)
1823 if(i_shdrp
[count
].contents
)
1825 bfd_seek (abfd
, i_shdrp
[count
].sh_offset
, SEEK_SET
);
1826 bfd_write (i_shdrp
[count
].contents
, i_shdrp
[count
].sh_size
, 1, abfd
);
1830 /* sample use of bfd:
1831 * bfd_seek (abfd, 0L, false);
1832 * bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd);
1833 * if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
1835 * old = bfd_tell(abfd);
1842 /* Given an index of a section, retrieve a pointer to it. Note
1843 that for our purposes, sections are indexed by {1, 2, ...} with
1844 0 being an illegal index. */
1846 /* In the original, each ELF section went into exactly one BFD
1847 section. This doesn't really make sense, so we need a real mapping.
1848 The mapping has to hide in the Elf_Internal_Shdr since asection
1849 doesn't have anything like a tdata field... */
1852 DEFUN (section_from_elf_index
, (abfd
, index
),
1856 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
1857 Elf_Internal_Shdr
*hdr
= i_shdrp
+ index
;
1859 switch (hdr
->sh_type
)
1861 /* ELF sections that map to BFD sections */
1865 bfd_section_from_shdr (abfd
, index
);
1866 return (struct sec
*)hdr
->rawdata
;
1869 return (struct sec
*)&bfd_abs_section
;
1873 /* given a section, search the header to find them... */
1875 DEFUN (elf_section_from_bfd_section
, (abfd
, asect
),
1879 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
1881 Elf_Internal_Shdr
*hdr
;
1882 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
1884 for(index
= 0; index
< maxindex
; index
++) {
1885 hdr
= &i_shdrp
[index
];
1886 switch (hdr
->sh_type
)
1888 /* ELF sections that map to BFD sections */
1893 if (((struct sec
*)(hdr
->rawdata
)) == asect
)
1905 DEFUN (elf_slurp_symbol_table
, (abfd
, symptrs
),
1907 asymbol
**symptrs
) /* Buffer for generated bfd symbols */
1909 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
1910 Elf_Internal_Shdr
*hdr
= i_shdrp
+ elf_onesymtab (abfd
);
1911 int symcount
; /* Number of external ELF symbols */
1913 char *strtab
; /* Buffer for raw ELF string table section */
1914 asymbol
*sym
; /* Pointer to current bfd symbol */
1915 asymbol
*symbase
; /* Buffer for generated bfd symbols */
1916 Elf_Internal_Sym i_sym
;
1917 Elf_External_Sym
*x_symp
;
1919 /* this is only valid because there is only one symtab... */
1920 /* FIXME: This is incorrect, there may also be a dynamic symbol
1921 table which is a subset of the full symbol table. We either need
1922 to be prepared to read both (and merge them) or ensure that we
1923 only read the full symbol table. Currently we only get called to
1924 read the full symbol table. -fnf */
1925 if (bfd_get_outsymbols (abfd
) != NULL
)
1930 /* Read each raw ELF symbol, converting from external ELF form to
1931 internal ELF form, and then using the information to create a
1932 canonical bfd symbol table entry.
1934 Note that we allocate the initial bfd canonical symbol buffer
1935 based on a one-to-one mapping of the ELF symbols to canonical
1936 symbols. We actually use all the ELF symbols, so there will be no
1937 space left over at the end. When we have all the symbols, we
1938 build the caller's pointer vector. */
1940 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) == -1)
1942 bfd_error
= system_call_error
;
1946 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
1947 symbase
= (asymbol
*) bfd_zalloc (abfd
, symcount
* sizeof (asymbol
));
1950 /* Temporarily allocate room for the raw ELF symbols. */
1951 x_symp
= (Elf_External_Sym
*) malloc (symcount
* sizeof (Elf_External_Sym
));
1953 if (bfd_read ((PTR
) x_symp
, sizeof (Elf_External_Sym
), symcount
, abfd
)
1954 != symcount
* sizeof (Elf_External_Sym
))
1957 bfd_error
= system_call_error
;
1960 /* Skip first symbol, which is a null dummy. */
1961 for (i
= 1; i
< symcount
; i
++)
1963 elf_swap_symbol_in (abfd
, x_symp
+ i
, &i_sym
);
1964 sym
-> the_bfd
= abfd
;
1965 if (i_sym
.st_name
> 0)
1966 sym
-> name
= elf_string_from_elf_section(abfd
, hdr
->sh_link
,
1969 sym
-> name
= "unnamed"; /* perhaps should include the number? */
1970 sym
-> value
= i_sym
.st_value
;
1971 /* FIXME -- this is almost certainly bogus. It's from Pace Willisson's
1972 hasty Solaris support, to pass the sizes of object files or functions
1973 down into GDB via the back door, to circumvent some other kludge in
1974 how Sun hacked stabs. -- gnu@cygnus.com */
1975 sym
-> udata
= (PTR
)i_sym
.st_size
;
1976 /* FIXME -- end of bogosity. */
1977 if (i_sym
.st_shndx
> 0 && i_sym
.st_shndx
< SHN_LORESERV
)
1979 sym
-> section
= section_from_elf_index (abfd
, i_sym
.st_shndx
);
1981 else if (i_sym
.st_shndx
== SHN_ABS
)
1983 sym
-> section
= &bfd_abs_section
;
1985 else if (i_sym
.st_shndx
== SHN_COMMON
)
1987 sym
-> section
= &bfd_com_section
;
1989 else if (i_sym
.st_shndx
== SHN_UNDEF
)
1991 sym
-> section
= &bfd_und_section
;
1994 sym
-> section
= &bfd_abs_section
;
1996 switch (ELF_ST_BIND (i_sym
.st_info
))
1999 sym
-> flags
|= BSF_LOCAL
;
2002 sym
-> flags
|= (BSF_GLOBAL
| BSF_EXPORT
);
2005 sym
-> flags
|= BSF_WEAK
;
2009 switch (ELF_ST_TYPE (i_sym
.st_info
))
2012 sym
->flags
|= BSF_SECTION_SYM
| BSF_DEBUGGING
;
2015 sym
->flags
|= BSF_FILE
| BSF_DEBUGGING
;
2021 /* We rely on the zalloc to clear out the final symbol entry. */
2023 /* We're now done with the raw symbols. */
2026 bfd_get_symcount(abfd
) = symcount
= sym
- symbase
;
2028 /* Fill in the user's symbol pointer vector if needed. */
2032 while (symcount
-- > 0)
2036 *symptrs
= 0; /* Final null pointer */
2042 /* Return the number of bytes required to hold the symtab vector.
2044 Note that we base it on the count plus 1, since we will null terminate
2045 the vector allocated based on this size. However, the ELF symbol table
2046 always has a dummy entry as symbol #0, so it ends up even. */
2049 DEFUN (elf_get_symtab_upper_bound
, (abfd
), bfd
*abfd
)
2051 unsigned int symcount
;
2052 unsigned int symtab_size
;
2053 Elf_Internal_Shdr
*i_shdrp
= elf_elfsections (abfd
);
2054 Elf_Internal_Shdr
*hdr
= i_shdrp
+ elf_onesymtab (abfd
);
2056 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
2057 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
));
2058 return (symtab_size
);
2062 This function return the number of bytes required to store the
2063 relocation information associated with section <<sect>>
2064 attached to bfd <<abfd>>
2068 elf_get_reloc_upper_bound (abfd
, asect
)
2072 if (asect
->flags
& SEC_RELOC
)
2074 /* either rel or rela */
2075 return asect
->_raw_size
;
2081 /* FIXME!!! sparc howto should go into elf-32-sparc.c */
2086 R_SPARC_8
, R_SPARC_16
, R_SPARC_32
,
2087 R_SPARC_DISP8
, R_SPARC_DISP16
, R_SPARC_DISP32
,
2088 R_SPARC_WDISP30
, R_SPARC_WDISP22
,
2089 R_SPARC_HI22
, R_SPARC_22
,
2090 R_SPARC_13
, R_SPARC_LO10
,
2091 R_SPARC_GOT10
, R_SPARC_GOT13
, R_SPARC_GOT22
,
2092 R_SPARC_PC10
, R_SPARC_PC22
,
2095 R_SPARC_GLOB_DAT
, R_SPARC_JMP_SLOT
,
2100 #define RELOC_TYPE_NAMES \
2102 "R_SPARC_8", "R_SPARC_16", "R_SPARC_32", \
2103 "R_SPARC_DISP8", "R_SPARC_DISP16", "R_SPARC_DISP32", \
2104 "R_SPARC_WDISP30", "R_SPARC_WDISP22", \
2105 "R_SPARC_HI22", "R_SPARC_22", \
2106 "R_SPARC_13", "R_SPARC_LO10", \
2107 "R_SPARC_GOT10", "R_SPARC_GOT13", "R_SPARC_GOT22", \
2108 "R_SPARC_PC10", "R_SPARC_PC22", \
2111 "R_SPARC_GLOB_DAT", "R_SPARC_JMP_SLOT", \
2112 "R_SPARC_RELATIVE", \
2115 static reloc_howto_type elf_howto_table
[] =
2117 HOWTO(R_SPARC_NONE
, 0,0, 0,false,0,false,false, 0,"R_SPARC_NONE", false,0,0x00000000,false),
2118 HOWTO(R_SPARC_8
, 0,0, 8,false,0,true, true, 0,"R_SPARC_8", false,0,0x000000ff,false),
2119 HOWTO(R_SPARC_16
, 0,1,16,false,0,true, true, 0,"R_SPARC_16", false,0,0x0000ffff,false),
2120 HOWTO(R_SPARC_32
, 0,2,32,false,0,true, true, 0,"R_SPARC_32", false,0,0xffffffff,false),
2121 HOWTO(R_SPARC_DISP8
, 0,0, 8,true, 0,false, true, 0,"R_SPARC_DISP8", false,0,0x000000ff,false),
2122 HOWTO(R_SPARC_DISP16
, 0,1,16,true, 0,false, true, 0,"R_SPARC_DISP16", false,0,0x0000ffff,false),
2123 HOWTO(R_SPARC_DISP32
, 0,2,32,true, 0,false, true, 0,"R_SPARC_DISP32", false,0,0x00ffffff,false),
2124 HOWTO(R_SPARC_WDISP30
,2,2,30,true, 0,false, true, 0,"R_SPARC_WDISP30",false,0,0x3fffffff,false),
2125 HOWTO(R_SPARC_WDISP22
,2,2,22,true, 0,false, true, 0,"R_SPARC_WDISP22",false,0,0x003fffff,false),
2126 HOWTO(R_SPARC_HI22
, 10,2,22,false,0,true, false, 0,"R_SPARC_HI22", false,0,0x003fffff,false),
2127 HOWTO(R_SPARC_22
, 0,2,22,false,0,true, true, 0,"R_SPARC_22", false,0,0x003fffff,false),
2128 HOWTO(R_SPARC_13
, 0,1,13,false,0,true, true, 0,"R_SPARC_13", false,0,0x00001fff,false),
2129 HOWTO(R_SPARC_LO10
, 0,1,10,false,0,true, false, 0,"R_SPARC_LO10", false,0,0x000003ff,false),
2130 HOWTO(R_SPARC_GOT10
, 0,1,10,false,0,false, true, 0,"R_SPARC_GOT10", false,0,0x000003ff,false),
2131 HOWTO(R_SPARC_GOT13
, 0,1,13,false,0,false, true, 0,"R_SPARC_GOT13", false,0,0x00001fff,false),
2132 HOWTO(R_SPARC_GOT22
, 10,2,22,false,0,false, true, 0,"R_SPARC_GOT22", false,0,0x003fffff,false),
2133 HOWTO(R_SPARC_PC10
, 0,1,10,false,0,true, true, 0,"R_SPARC_PC10", false,0,0x000003ff,false),
2134 HOWTO(R_SPARC_PC22
, 0,2,22,false,0,true, true, 0,"R_SPARC_PC22", false,0,0x003fffff,false),
2135 HOWTO(R_SPARC_WPLT30
, 0,0,00,false,0,false,false, 0,"R_SPARC_WPLT30", false,0,0x00000000,false),
2136 HOWTO(R_SPARC_COPY
, 0,0,00,false,0,false,false, 0,"R_SPARC_COPY", false,0,0x00000000,false),
2137 HOWTO(R_SPARC_GLOB_DAT
,0,0,00,false,0,false,false,0,"R_SPARC_GLOB_DAT",false,0,0x00000000,false),
2138 HOWTO(R_SPARC_JMP_SLOT
,0,0,00,false,0,false,false,0,"R_SPARC_JMP_SLOT",false,0,0x00000000,false),
2139 HOWTO(R_SPARC_RELATIVE
,0,0,00,false,0,false,false,0,"R_SPARC_RELATIVE",false,0,0x00000000,false),
2140 HOWTO(R_SPARC_UA32
, 0,0,00,false,0,false,false,0,"R_SPARC_UA32", false,0,0x00000000,false),
2145 DEFUN(elf_info_to_howto
, (abfd
, cache_ptr
, dst
),
2147 arelent
*cache_ptr AND
2148 Elf_Internal_Rela
*dst
)
2150 /* FIXME!!! just doing sparc for now... */
2152 BFD_ASSERT (ELF_R_TYPE(dst
->r_info
) < 24);
2154 cache_ptr
->howto
= &elf_howto_table
[ELF_R_TYPE(dst
->r_info
)];
2156 fprintf (stderr
, "elf_info_to_howto not implemented\n");
2162 DEFUN(elf_slurp_reloca_table
,(abfd
, asect
, symbols
),
2167 Elf_External_Rela
*native_relocs
;
2168 arelent
*reloc_cache
;
2173 if (asect
->relocation
)
2175 if (asect
->reloc_count
== 0)
2177 if (asect
->flags
& SEC_CONSTRUCTOR
)
2180 bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
);
2181 native_relocs
= (Elf_External_Rela
*)
2182 bfd_alloc(abfd
, asect
->reloc_count
* sizeof(Elf_External_Rela
));
2183 bfd_read ((PTR
) native_relocs
,
2184 sizeof(Elf_External_Rela
), asect
->reloc_count
, abfd
);
2186 reloc_cache
= (arelent
*)
2187 bfd_alloc(abfd
, (size_t) (asect
->reloc_count
* sizeof(arelent
)));
2189 if (! reloc_cache
) {
2190 bfd_error
= no_memory
;
2194 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2196 #ifdef RELOC_PROCESSING
2197 /* sparc, 68k, 88k, 860 use rela only. */
2198 /* 386 and we32000 use rel only... fix it for them later. */
2199 Elf_Internal_Rela dst
;
2200 Elf_External_Rela
*src
;
2202 cache_ptr
= reloc_cache
+ idx
;
2203 src
= native_relocs
+ idx
;
2204 elf_swap_reloca_in(abfd
, src
, &dst
);
2206 RELOC_PROCESSING(cache_ptr
, &dst
, symbols
, abfd
, asect
);
2208 Elf_Internal_Rela dst
;
2210 Elf_External_Rela
*src
;
2212 cache_ptr
= reloc_cache
+ idx
;
2213 src
= native_relocs
+ idx
;
2215 elf_swap_reloca_in(abfd
, src
, &dst
);
2217 if(asect
->flags
& SEC_RELOC
)
2219 /* relocatable, so the offset is off of the section */
2220 cache_ptr
->address
= dst
.r_offset
+ asect
->vma
;
2224 /* non-relocatable, so the offset a virtual address */
2225 cache_ptr
->address
= dst
.r_offset
;
2227 /* ELF_R_SYM(dst.r_info) is the symbol table offset... */
2228 cache_ptr
->sym_ptr_ptr
= symbols
+ ELF_R_SYM(dst
.r_info
);
2229 cache_ptr
->addend
= dst
.r_addend
;
2230 /* ptr = *(cache_ptr->sym_ptr_ptr); */
2232 /* Fill in the cache_ptr->howto field from dst.r_type */
2233 elf_info_to_howto(abfd
, cache_ptr
, &dst
);
2237 asect
->relocation
= reloc_cache
;
2243 elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
2249 arelent
*tblptr
= section
->relocation
;
2250 unsigned int count
= 0;
2252 /* snarfed from coffcode.h */
2253 /* FIXME: this could be reloc... */
2254 elf_slurp_reloca_table(abfd
, section
, symbols
);
2256 tblptr
= section
->relocation
;
2260 for (; count
++ < section
->reloc_count
;)
2261 *relptr
++ = tblptr
++;
2264 return section
->reloc_count
;
2268 DEFUN (elf_get_symtab
, (abfd
, alocation
),
2270 asymbol
**alocation
)
2272 unsigned int symcount
;
2275 if (!elf_slurp_symbol_table (abfd
, alocation
))
2278 return (bfd_get_symcount (abfd
));
2282 DEFUN (elf_make_empty_symbol
, (abfd
),
2285 elf_symbol_type
*newsym
;
2287 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
2290 bfd_error
= no_memory
;
2295 newsym
-> symbol
.the_bfd
= abfd
;
2296 return (&newsym
-> symbol
);
2301 DEFUN (elf_print_symbol
,(ignore_abfd
, filep
, symbol
, how
),
2302 bfd
*ignore_abfd AND
2305 bfd_print_symbol_type how
)
2307 FILE *file
= (FILE *)filep
;
2310 case bfd_print_symbol_name
:
2311 fprintf(file
, "%s", symbol
->name
);
2313 case bfd_print_symbol_more
:
2314 fprintf(file
, "elf %lx %lx",
2318 case bfd_print_symbol_nm
:
2319 case bfd_print_symbol_all
:
2321 CONST
char *section_name
;
2322 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
2323 bfd_print_symbol_vandf((PTR
) file
, symbol
);
2324 fprintf(file
, " %s\t%s",
2334 DEFUN (elf_get_lineno
,(ignore_abfd
, symbol
),
2335 bfd
*ignore_abfd AND
2338 fprintf (stderr
, "elf_get_lineno unimplemented\n");
2345 DEFUN (elf_set_arch_mach
,(abfd
, arch
, machine
),
2347 enum bfd_architecture arch AND
2348 unsigned long machine
)
2350 /* Allow any architecture to be supported by the elf backend */
2353 case bfd_arch_unknown
: /* EM_NONE */
2354 case bfd_arch_sparc
: /* EM_SPARC */
2355 case bfd_arch_i386
: /* EM_386 */
2356 case bfd_arch_m68k
: /* EM_68K */
2357 case bfd_arch_m88k
: /* EM_88K */
2358 case bfd_arch_i860
: /* EM_860 */
2359 case bfd_arch_mips
: /* EM_MIPS (MIPS R3000) */
2360 return bfd_default_set_arch_mach(abfd
, arch
, machine
);
2367 DEFUN (elf_find_nearest_line
,(abfd
,
2375 asection
*section AND
2376 asymbol
**symbols AND
2378 CONST
char **filename_ptr AND
2379 CONST
char **functionname_ptr AND
2380 unsigned int *line_ptr
)
2382 fprintf (stderr
, "elf_find_nearest_line unimplemented\n");
2389 DEFUN (elf_sizeof_headers
, (abfd
, reloc
),
2393 fprintf (stderr
, "elf_sizeof_headers unimplemented\n");
2400 DEFUN(elf_set_section_contents
, (abfd
, section
, location
, offset
, count
),
2405 bfd_size_type count
)
2409 if (abfd
->output_has_begun
== false) /* set by bfd.c handler? */
2411 /* do setup calculations (FIXME) */
2412 elf_compute_section_file_positions(abfd
);
2415 if(bfd_seek (abfd
, (file_ptr
)section
->filepos
+ offset
, SEEK_SET
) == -1)
2417 if(bfd_write (location
, (bfd_size_type
)1, count
, abfd
) != count
)
2420 /* we really just need to save the contents away... */
2421 dest_sect
= elf_section_from_bfd_section(abfd
, section
);
2425 /* FIXME: allocate in set_section_size, then copy in here... */
2426 contents
= (void*)bfd_alloc(abfd
, count
);
2427 BFD_ASSERT(contents
);
2428 memcpy(contents
, location
, count
);
2429 elf_elfsections (abfd
)[dest_sect
].contents
= contents
;
2435 /* This structure contains everything that BFD knows about a target.
2436 It includes things like its byte order, name, what routines to call
2437 to do various operations, etc. Every BFD points to a target structure
2438 with its "xvec" member.
2440 There are two such structures here: one for big-endian machines and
2441 one for little-endian machines. */
2443 /* Archives are generic or unimplemented. */
2444 #define elf_slurp_armap bfd_false
2445 #define elf_slurp_extended_name_table _bfd_slurp_extended_name_table
2446 #define elf_truncate_arname bfd_dont_truncate_arname
2447 #define elf_openr_next_archived_file bfd_generic_openr_next_archived_file
2448 #define elf_generic_stat_arch_elt bfd_generic_stat_arch_elt
2449 #define elf_write_armap (PROTO (boolean, (*), \
2450 (bfd *arch, unsigned int elength, struct orl *map, unsigned int orl_count, \
2451 int stridx))) bfd_false
2453 /* Ordinary section reading and writing */
2454 #define elf_new_section_hook _bfd_dummy_new_section_hook
2455 #define elf_get_section_contents bfd_generic_get_section_contents
2456 /* #define elf_set_section_contents bfd_generic_set_section_contents */
2457 #define elf_close_and_cleanup bfd_generic_close_and_cleanup
2459 #define elf_bfd_debug_info_start bfd_void
2460 #define elf_bfd_debug_info_end bfd_void
2461 #define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
2462 #define elf_bfd_get_relocated_section_contents \
2463 bfd_generic_get_relocated_section_contents
2464 #define elf_bfd_relax_section bfd_generic_relax_section
2465 bfd_target elf_big_vec
=
2467 /* name: identify kind of target */
2470 /* flavour: general indication about file */
2471 bfd_target_elf_flavour
,
2473 /* byteorder_big_p: data is big endian */
2476 /* header_byteorder_big_p: header is also big endian */
2479 /* object_flags: mask of all file flags */
2480 (HAS_RELOC
| EXEC_P
| HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
|
2483 /* section_flags: mask of all section flags */
2484 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_READONLY
|
2485 SEC_CODE
| SEC_DATA
),
2488 /* leading_symbol_char: is the first char of a user symbol
2489 predictable, and if so what is it */
2492 /* ar_pad_char: pad character for filenames within an archive header
2493 FIXME: this really has nothing to do with ELF, this is a characteristic
2494 of the archiver and/or os and should be independently tunable */
2497 /* ar_max_namelen: maximum number of characters in an archive header
2498 FIXME: this really has nothing to do with ELF, this is a characteristic
2499 of the archiver and should be independently tunable. This value is
2500 a WAG (wild a** guess) */
2503 /* align_power_min: minimum alignment restriction for any section
2504 FIXME: this value may be target machine dependent */
2507 /* Routines to byte-swap various sized integers from the data sections */
2508 _do_getb64
, _do_putb64
, _do_getb32
, _do_putb32
, _do_getb16
, _do_putb16
,
2510 /* Routines to byte-swap various sized integers from the file headers */
2511 _do_getb64
, _do_putb64
, _do_getb32
, _do_putb32
, _do_getb16
, _do_putb16
,
2513 /* bfd_check_format: check the format of a file being read */
2514 { _bfd_dummy_target
, /* unknown format */
2515 elf_object_p
, /* assembler/linker output (object file) */
2516 bfd_generic_archive_p
, /* an archive */
2517 elf_core_file_p
/* a core file */
2520 /* bfd_set_format: set the format of a file being written */
2523 _bfd_generic_mkarchive
,
2527 /* bfd_write_contents: write cached information into a file being written */
2529 elf_write_object_contents
,
2530 _bfd_write_archive_contents
,
2534 /* Initialize a jump table with the standard macro. All names start
2542 bfd_target elf_little_vec
=
2544 /* name: identify kind of target */
2547 /* flavour: general indication about file */
2548 bfd_target_elf_flavour
,
2550 /* byteorder_big_p: data is big endian */
2551 false, /* Nope -- this one's little endian */
2553 /* header_byteorder_big_p: header is also big endian */
2554 false, /* Nope -- this one's little endian */
2556 /* object_flags: mask of all file flags */
2557 (HAS_RELOC
| EXEC_P
| HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
|
2560 /* section_flags: mask of all section flags */
2561 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_READONLY
|
2564 /* leading_symbol_char: is the first char of a user symbol
2565 predictable, and if so what is it */
2568 /* ar_pad_char: pad character for filenames within an archive header
2569 FIXME: this really has nothing to do with ELF, this is a characteristic
2570 of the archiver and/or os and should be independently tunable */
2573 /* ar_max_namelen: maximum number of characters in an archive header
2574 FIXME: this really has nothing to do with ELF, this is a characteristic
2575 of the archiver and should be independently tunable. This value is
2576 a WAG (wild a** guess) */
2579 /* align_power_min: minimum alignment restriction for any section
2580 FIXME: this value may be target machine dependent */
2583 /* Routines to byte-swap various sized integers from the data sections */
2584 _do_getl64
, _do_putl64
, _do_getl32
, _do_putl32
, _do_getl16
, _do_putl16
,
2586 /* Routines to byte-swap various sized integers from the file headers */
2587 _do_getl64
, _do_putl64
, _do_getl32
, _do_putl32
, _do_getl16
, _do_putl16
,
2589 /* bfd_check_format: check the format of a file being read */
2590 { _bfd_dummy_target
, /* unknown format */
2591 elf_object_p
, /* assembler/linker output (object file) */
2592 bfd_generic_archive_p
, /* an archive */
2593 elf_core_file_p
/* a core file */
2596 /* bfd_set_format: set the format of a file being written */
2599 _bfd_generic_mkarchive
,
2603 /* bfd_write_contents: write cached information into a file being written */
2605 elf_write_object_contents
,
2606 _bfd_write_archive_contents
,
2610 /* Initialize a jump table with the standard macro. All names start