1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992, 1993 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include "elf/common.h"
25 #include "elf/internal.h"
26 #include "elf/external.h"
28 /* If size isn't specified as 64 or 32, NAME macro should fail. */
31 #define NAME(x,y) CAT4(x,64,_,y)
34 #define NAME(x,y) CAT4(x,32,_,y)
39 #define NAME(x,y) CAT4(x,NOSIZE,_,y)
42 #define ElfNAME(X) NAME(Elf,X)
43 #define elfNAME(X) NAME(elf,X)
45 /* Information held for an ELF symbol. The first field is the
46 corresponding asymbol. Every symbol is an ELF file is actually a
47 pointer to this structure, although it is often handled as a
48 pointer to an asymbol. */
54 /* ELF symbol information. */
55 Elf_Internal_Sym internal_elf_sym
;
56 /* Backend specific information. */
59 unsigned int hppa_arg_reloc
;
66 /* Constant information held for an ELF backend. */
68 struct elf_backend_data
70 /* Whether the backend uses REL or RELA relocations. FIXME: some
71 ELF backends use both. When we need to support one, this whole
72 approach will need to be changed. */
75 /* Whether this backend is 64 bits or not. FIXME: Who cares? */
78 /* The architecture for this backend. */
79 enum bfd_architecture arch
;
81 /* The ELF machine code (EM_xxxx) for this backend. */
84 /* The maximum page size for this backend. */
87 /* A function to translate an ELF RELA relocation to a BFD arelent
89 void (*elf_info_to_howto
) PARAMS ((bfd
*, arelent
*,
90 Elf_Internal_Rela
*));
92 /* A function to translate an ELF REL relocation to a BFD arelent
94 void (*elf_info_to_howto_rel
) PARAMS ((bfd
*, arelent
*,
97 /* A function to determine whether a symbol is global when
98 partitioning the symbol table into local and global symbols.
99 This should be NULL for most targets, in which case the correct
100 thing will be done. MIPS ELF, at least on the Irix 5, has
101 special requirements. */
102 boolean (*elf_backend_sym_is_global
) PARAMS ((bfd
*, asymbol
*));
104 /* The remaining functions are hooks which are called only if they
107 /* A function to permit a backend specific check on whether a
108 particular BFD format is relevant for an object file, and to
109 permit the backend to set any global information it wishes. When
110 this is called elf_elfheader is set, but anything else should be
111 used with caution. If this returns false, the check_format
112 routine will return a bfd_error_wrong_format error. */
113 boolean (*elf_backend_object_p
) PARAMS ((bfd
*));
115 /* A function to do additional symbol processing when reading the
116 ELF symbol table. This is where any processor-specific special
117 section indices are handled. */
118 void (*elf_backend_symbol_processing
) PARAMS ((bfd
*, asymbol
*));
120 /* A function to do additional symbol processing after reading the
121 entire ELF symbol table. */
122 boolean (*elf_backend_symbol_table_processing
) PARAMS ((bfd
*,
126 /* A function to do additional processing on the ELF section header
127 just before writing it out. This is used to set the flags and
128 type fields for some sections, or to actually write out data for
130 boolean (*elf_backend_section_processing
) PARAMS ((bfd
*,
131 Elf32_Internal_Shdr
*));
133 /* A function to handle unusual section types when creating BFD
134 sections from ELF sections. */
135 boolean (*elf_backend_section_from_shdr
) PARAMS ((bfd
*,
136 Elf32_Internal_Shdr
*,
139 /* A function to set up the ELF section header for a BFD section in
140 preparation for writing it out. This is where the flags and type
141 fields are set for unusual sections. */
142 boolean (*elf_backend_fake_sections
) PARAMS ((bfd
*, Elf32_Internal_Shdr
*,
145 /* A function to get the ELF section index for a BFD section. If
146 this returns true, the section was found. If it is a normal ELF
147 section, *RETVAL should be left unchanged. If it is not a normal
148 ELF section *RETVAL should be set to the SHN_xxxx index. */
149 boolean (*elf_backend_section_from_bfd_section
)
150 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*, int *retval
));
152 /* A function to do any beginning processing needed for the ELF file
153 before building the ELF headers and computing file positions. */
154 void (*elf_backend_begin_write_processing
) PARAMS ((bfd
*));
156 /* A function to do any final processing needed for the ELF file
157 before writing it out. */
158 void (*elf_backend_final_write_processing
) PARAMS ((bfd
*));
160 /* The swapping table to use when dealing with ECOFF information.
161 Used for the MIPS ELF .mdebug section. */
162 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
167 int elf_sym_num
; /* sym# after locals/globals are reordered */
170 typedef struct elf_sym_extra Elf_Sym_Extra
;
172 struct bfd_elf_section_data
{
173 Elf_Internal_Shdr this_hdr
;
174 Elf_Internal_Shdr rel_hdr
;
175 int this_idx
, rel_idx
;
177 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
178 #define shdr_name(abfd,shdr) (elf_shstrtab (abfd)->tab + (shdr)->sh_name)
180 #define get_elf_backend_data(abfd) \
181 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
190 /* Some private data is stashed away for future use using the tdata pointer
191 in the bfd structure. */
195 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
196 Elf_Internal_Shdr
**elf_sect_ptr
;
197 Elf_Internal_Phdr
*phdr
;
198 struct strtab
*strtab_ptr
;
201 Elf_Internal_Sym
*internal_syms
;
202 elf_symbol_type
*symbols
; /* elf_symbol_type */
203 Elf_Sym_Extra
*sym_extra
;
204 asymbol
**section_syms
; /* STT_SECTION symbols for each section */
205 int num_section_syms
; /* number of section_syms allocated */
206 Elf_Internal_Shdr symtab_hdr
;
207 Elf_Internal_Shdr shstrtab_hdr
;
208 Elf_Internal_Shdr strtab_hdr
;
209 Elf_Internal_Shdr dynsymtab_hdr
;
210 Elf_Internal_Shdr dynstrtab_hdr
;
211 int symtab_section
, shstrtab_section
, strtab_section
, dynsymtab_section
;
212 file_ptr next_file_pos
;
213 void *prstatus
; /* The raw /proc prstatus structure */
214 void *prpsinfo
; /* The raw /proc prpsinfo structure */
215 bfd_vma gp
; /* The gp value (MIPS only, for now) */
216 int gp_size
; /* The gp size (MIPS only, for now) */
219 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
220 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
221 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
222 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
223 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
224 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
225 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
226 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
227 #define elf_sym_extra(bfd) (elf_tdata(bfd) -> sym_extra)
228 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
229 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
230 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
231 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
232 #define obj_symbols(bfd) (elf_tdata(bfd) -> symbols)
233 #define obj_internal_syms(bfd) (elf_tdata(bfd) -> internal_syms)
234 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
235 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
237 extern char * elf_string_from_elf_section
PARAMS ((bfd
*, unsigned, unsigned));
238 extern char * elf_get_str_section
PARAMS ((bfd
*, unsigned));
240 #define bfd_elf32_mkobject bfd_elf_mkobject
241 #define bfd_elf64_mkobject bfd_elf_mkobject
242 #define elf_mkobject bfd_elf_mkobject
244 extern unsigned long bfd_elf_hash
PARAMS ((CONST
unsigned char *));
246 extern bfd_reloc_status_type bfd_elf_generic_reloc
PARAMS ((bfd
*,
253 extern boolean bfd_elf_mkobject
PARAMS ((bfd
*));
254 extern Elf_Internal_Shdr
*bfd_elf_find_section
PARAMS ((bfd
*, char *));
256 extern boolean bfd_elf32_write_object_contents
PARAMS ((bfd
*));
257 extern boolean bfd_elf64_write_object_contents
PARAMS ((bfd
*));
259 extern bfd_target
*bfd_elf32_object_p
PARAMS ((bfd
*));
260 extern bfd_target
*bfd_elf32_core_file_p
PARAMS ((bfd
*));
261 extern char *bfd_elf32_core_file_failing_command
PARAMS ((bfd
*));
262 extern int bfd_elf32_core_file_failing_signal
PARAMS ((bfd
*));
263 extern boolean bfd_elf32_core_file_matches_executable_p
PARAMS ((bfd
*,
265 extern boolean bfd_elf32_set_section_contents
PARAMS ((bfd
*, sec_ptr
, PTR
,
269 extern long bfd_elf32_get_symtab_upper_bound
PARAMS ((bfd
*));
270 extern long bfd_elf32_get_symtab
PARAMS ((bfd
*, asymbol
**));
271 extern long bfd_elf32_get_dynamic_symtab_upper_bound
PARAMS ((bfd
*));
272 extern long bfd_elf32_canonicalize_dynamic_symtab
PARAMS ((bfd
*, asymbol
**));
273 extern long bfd_elf32_get_reloc_upper_bound
PARAMS ((bfd
*, sec_ptr
));
274 extern long bfd_elf32_canonicalize_reloc
PARAMS ((bfd
*, sec_ptr
,
275 arelent
**, asymbol
**));
276 extern asymbol
*bfd_elf32_make_empty_symbol
PARAMS ((bfd
*));
277 extern void bfd_elf32_print_symbol
PARAMS ((bfd
*, PTR
, asymbol
*,
278 bfd_print_symbol_type
));
279 extern void bfd_elf32_get_symbol_info
PARAMS ((bfd
*, asymbol
*,
281 extern alent
*bfd_elf32_get_lineno
PARAMS ((bfd
*, asymbol
*));
282 extern boolean bfd_elf32_set_arch_mach
PARAMS ((bfd
*, enum bfd_architecture
,
284 extern boolean bfd_elf32_find_nearest_line
PARAMS ((bfd
*, asection
*,
286 bfd_vma
, CONST
char **,
289 extern int bfd_elf32_sizeof_headers
PARAMS ((bfd
*, boolean
));
290 extern void bfd_elf32__write_relocs
PARAMS ((bfd
*, asection
*, PTR
));
291 extern boolean bfd_elf32_new_section_hook
PARAMS ((bfd
*, asection
*));
293 /* If the target doesn't have reloc handling written yet: */
294 extern void bfd_elf32_no_info_to_howto
PARAMS ((bfd
*, arelent
*,
295 Elf32_Internal_Rela
*));
297 extern bfd_target
*bfd_elf64_object_p
PARAMS ((bfd
*));
298 extern bfd_target
*bfd_elf64_core_file_p
PARAMS ((bfd
*));
299 extern char *bfd_elf64_core_file_failing_command
PARAMS ((bfd
*));
300 extern int bfd_elf64_core_file_failing_signal
PARAMS ((bfd
*));
301 extern boolean bfd_elf64_core_file_matches_executable_p
PARAMS ((bfd
*,
303 extern boolean bfd_elf64_set_section_contents
PARAMS ((bfd
*, sec_ptr
, PTR
,
307 extern long bfd_elf64_get_symtab_upper_bound
PARAMS ((bfd
*));
308 extern long bfd_elf64_get_symtab
PARAMS ((bfd
*, asymbol
**));
309 extern long bfd_elf64_get_dynamic_symtab_upper_bound
PARAMS ((bfd
*));
310 extern long bfd_elf64_canonicalize_dynamic_symtab
PARAMS ((bfd
*, asymbol
**));
311 extern long bfd_elf64_get_reloc_upper_bound
PARAMS ((bfd
*, sec_ptr
));
312 extern long bfd_elf64_canonicalize_reloc
PARAMS ((bfd
*, sec_ptr
,
313 arelent
**, asymbol
**));
314 extern asymbol
*bfd_elf64_make_empty_symbol
PARAMS ((bfd
*));
315 extern void bfd_elf64_print_symbol
PARAMS ((bfd
*, PTR
, asymbol
*,
316 bfd_print_symbol_type
));
317 extern void bfd_elf64_get_symbol_info
PARAMS ((bfd
*, asymbol
*,
319 extern alent
*bfd_elf64_get_lineno
PARAMS ((bfd
*, asymbol
*));
320 extern boolean bfd_elf64_set_arch_mach
PARAMS ((bfd
*, enum bfd_architecture
,
322 extern boolean bfd_elf64_find_nearest_line
PARAMS ((bfd
*, asection
*,
324 bfd_vma
, CONST
char **,
327 extern int bfd_elf64_sizeof_headers
PARAMS ((bfd
*, boolean
));
328 extern void bfd_elf64__write_relocs
PARAMS ((bfd
*, asection
*, PTR
));
329 extern boolean bfd_elf64_new_section_hook
PARAMS ((bfd
*, asection
*));
331 /* If the target doesn't have reloc handling written yet: */
332 extern void bfd_elf64_no_info_to_howto
PARAMS ((bfd
*, arelent
*,
333 Elf64_Internal_Rela
*));
335 #endif /* _LIBELF_H_ */