1 /* This file defines generic ELF types, structures, and macros.
2 Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2015 Red Hat, Inc.
3 This file is part of elfutils.
5 This file is free software; you can redistribute it and/or modify
6 it under the terms of either
8 * the GNU Lesser General Public License as published by the Free
9 Software Foundation; either version 3 of the License, or (at
10 your option) any later version
14 * the GNU General Public License as published by the Free
15 Software Foundation; either version 2 of the License, or (at
16 your option) any later version
18 or both in parallel, as here.
20 elfutils is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 General Public License for more details.
25 You should have received copies of the GNU General Public License and
26 the GNU Lesser General Public License along with this program. If
27 not, see <http://www.gnu.org/licenses/>. */
39 /* Class independent type definitions. Correctly speaking this is not
40 true. We assume that 64-bit binaries are the largest class and
41 therefore all other classes can be represented without loss. */
43 /* Type for a 16-bit quantity. */
44 typedef Elf64_Half GElf_Half;
46 /* Types for signed and unsigned 32-bit quantities. */
47 typedef Elf64_Word GElf_Word;
48 typedef Elf64_Sword GElf_Sword;
50 /* Types for signed and unsigned 64-bit quantities. */
51 typedef Elf64_Xword GElf_Xword;
52 typedef Elf64_Sxword GElf_Sxword;
54 /* Type of addresses. */
55 typedef Elf64_Addr GElf_Addr;
57 /* Type of file offsets. */
58 typedef Elf64_Off GElf_Off;
61 /* The ELF file header. This appears at the start of every ELF file. */
62 typedef Elf64_Ehdr GElf_Ehdr;
65 typedef Elf64_Shdr GElf_Shdr;
68 /* XXX This should probably be a larger type in preparation of times when
69 regular section indices can be larger. */
70 typedef Elf64_Section GElf_Section;
72 /* Symbol table entry. */
73 typedef Elf64_Sym GElf_Sym;
75 /* The syminfo section if available contains additional information about
76 every dynamic symbol. */
77 typedef Elf64_Syminfo GElf_Syminfo;
79 /* Relocation table entry without addend (in section of type SHT_REL). */
80 typedef Elf64_Rel GElf_Rel;
82 /* Relocation table entry with addend (in section of type SHT_RELA). */
83 typedef Elf64_Rela GElf_Rela;
85 /* Program segment header. */
86 typedef Elf64_Phdr GElf_Phdr;
88 /* Header of a compressed section. */
89 typedef Elf64_Chdr GElf_Chdr;
91 /* Dynamic section entry. */
92 typedef Elf64_Dyn GElf_Dyn;
95 /* Version definition sections. */
96 typedef Elf64_Verdef GElf_Verdef;
98 /* Auxialiary version information. */
99 typedef Elf64_Verdaux GElf_Verdaux;
101 /* Version dependency section. */
102 typedef Elf64_Verneed GElf_Verneed;
104 /* Auxiliary needed version information. */
105 typedef Elf64_Vernaux GElf_Vernaux;
108 /* Type for version symbol information. */
109 typedef Elf64_Versym GElf_Versym;
112 /* Auxiliary vector. */
113 typedef Elf64_auxv_t GElf_auxv_t;
116 /* Note section contents. */
117 typedef Elf64_Nhdr GElf_Nhdr;
120 /* Move structure. */
121 typedef Elf64_Move GElf_Move;
124 /* Library list structure. */
125 typedef Elf64_Lib GElf_Lib;
128 /* How to extract and insert information held in the st_info field. */
130 #define GELF_ST_BIND(val) ELF64_ST_BIND (val)
131 #define GELF_ST_TYPE(val) ELF64_ST_TYPE (val)
132 #define GELF_ST_INFO(bind, type) ELF64_ST_INFO (bind, type)
134 /* How to extract information held in the st_other field. */
136 #define GELF_ST_VISIBILITY(val) ELF64_ST_VISIBILITY (val)
139 /* How to extract and insert information held in the r_info field. */
141 #define GELF_R_SYM(info) ELF64_R_SYM (info)
142 #define GELF_R_TYPE(info) ELF64_R_TYPE (info)
143 #define GELF_R_INFO(sym, type) ELF64_R_INFO (sym, type)
146 /* How to extract and insert information held in the m_info field. */
147 #define GELF_M_SYM(info) ELF64_M_SYM (info)
148 #define GELF_M_SIZE(info) ELF64_M_SIZE (info)
149 #define GELF_M_INFO(sym, size) ELF64_M_INFO (sym, size)
152 /* Get class of the file associated with ELF. */
153 extern int gelf_getclass (Elf *__elf);
156 /* Return size of array of COUNT elements of the type denoted by TYPE
157 in the external representation. The binary class is taken from ELF.
158 The result is based on version VERSION of the ELF standard. */
159 extern size_t gelf_fsize (Elf *__elf, Elf_Type __type, size_t __count,
160 unsigned int __version);
162 /* Retrieve object file header. */
163 extern GElf_Ehdr *gelf_getehdr (Elf *__elf, GElf_Ehdr *__dest);
165 /* Update the ELF header. */
166 extern int gelf_update_ehdr (Elf *__elf, GElf_Ehdr *__src);
168 /* Create new ELF header if none exists. Creates an Elf32_Ehdr if CLASS
169 is ELFCLASS32 or an Elf64_Ehdr if CLASS is ELFCLASS64. Returns NULL
171 extern void *gelf_newehdr (Elf *__elf, int __class);
173 /* Get section at OFFSET. */
174 extern Elf_Scn *gelf_offscn (Elf *__elf, GElf_Off __offset);
176 /* Retrieve section header. */
177 extern GElf_Shdr *gelf_getshdr (Elf_Scn *__scn, GElf_Shdr *__dst);
179 /* Update section header. */
180 extern int gelf_update_shdr (Elf_Scn *__scn, GElf_Shdr *__src);
182 /* Retrieve program header table entry. */
183 extern GElf_Phdr *gelf_getphdr (Elf *__elf, int __ndx, GElf_Phdr *__dst);
185 /* Update the program header. */
186 extern int gelf_update_phdr (Elf *__elf, int __ndx, GElf_Phdr *__src);
188 /* Create new program header with PHNUM entries. Creates either an
189 Elf32_Phdr or an Elf64_Phdr depending on whether the given ELF is
190 ELFCLASS32 or ELFCLASS64. Returns NULL on error. */
191 extern void *gelf_newphdr (Elf *__elf, size_t __phnum);
193 /* Get compression header of section if any. Returns NULL and sets
194 elf_errno if the section isn't compressed or an error occurred. */
195 extern GElf_Chdr *gelf_getchdr (Elf_Scn *__scn, GElf_Chdr *__dst);
197 /* Convert data structure from the representation in the file represented
198 by ELF to their memory representation. */
199 extern Elf_Data *gelf_xlatetom (Elf *__elf, Elf_Data *__dest,
200 const Elf_Data *__src, unsigned int __encode);
202 /* Convert data structure from to the representation in memory
203 represented by ELF file representation. */
204 extern Elf_Data *gelf_xlatetof (Elf *__elf, Elf_Data *__dest,
205 const Elf_Data *__src, unsigned int __encode);
208 /* Retrieve REL relocation info at the given index. */
209 extern GElf_Rel *gelf_getrel (Elf_Data *__data, int __ndx, GElf_Rel *__dst);
211 /* Retrieve RELA relocation info at the given index. */
212 extern GElf_Rela *gelf_getrela (Elf_Data *__data, int __ndx, GElf_Rela *__dst);
214 /* Update REL relocation information at given index. */
215 extern int gelf_update_rel (Elf_Data *__dst, int __ndx, GElf_Rel *__src);
217 /* Update RELA relocation information at given index. */
218 extern int gelf_update_rela (Elf_Data *__dst, int __ndx, GElf_Rela *__src);
221 /* Retrieve symbol information from the symbol table at the given index. */
222 extern GElf_Sym *gelf_getsym (Elf_Data *__data, int __ndx, GElf_Sym *__dst);
224 /* Update symbol information in the symbol table at the given index. */
225 extern int gelf_update_sym (Elf_Data *__data, int __ndx, GElf_Sym *__src);
228 /* Retrieve symbol information and separate section index from the
229 symbol table at the given index. */
230 extern GElf_Sym *gelf_getsymshndx (Elf_Data *__symdata, Elf_Data *__shndxdata,
231 int __ndx, GElf_Sym *__sym,
232 Elf32_Word *__xshndx);
234 /* Update symbol information and separate section index in the symbol
235 table at the given index. */
236 extern int gelf_update_symshndx (Elf_Data *__symdata, Elf_Data *__shndxdata,
237 int __ndx, GElf_Sym *__sym,
238 Elf32_Word __xshndx);
241 /* Retrieve additional symbol information from the symbol table at the
243 extern GElf_Syminfo *gelf_getsyminfo (Elf_Data *__data, int __ndx,
244 GElf_Syminfo *__dst);
246 /* Update additional symbol information in the symbol table at the
248 extern int gelf_update_syminfo (Elf_Data *__data, int __ndx,
249 GElf_Syminfo *__src);
252 /* Get information from dynamic table at the given index. */
253 extern GElf_Dyn *gelf_getdyn (Elf_Data *__data, int __ndx, GElf_Dyn *__dst);
255 /* Update information in dynamic table at the given index. */
256 extern int gelf_update_dyn (Elf_Data *__dst, int __ndx, GElf_Dyn *__src);
259 /* Get move structure at the given index. */
260 extern GElf_Move *gelf_getmove (Elf_Data *__data, int __ndx, GElf_Move *__dst);
262 /* Update move structure at the given index. */
263 extern int gelf_update_move (Elf_Data *__data, int __ndx,
267 /* Get library from table at the given index. */
268 extern GElf_Lib *gelf_getlib (Elf_Data *__data, int __ndx, GElf_Lib *__dst);
270 /* Update library in table at the given index. */
271 extern int gelf_update_lib (Elf_Data *__data, int __ndx, GElf_Lib *__src);
275 /* Retrieve symbol version information at given index. */
276 extern GElf_Versym *gelf_getversym (Elf_Data *__data, int __ndx,
279 /* Update symbol version information. */
280 extern int gelf_update_versym (Elf_Data *__data, int __ndx,
284 /* Retrieve required symbol version information at given offset. */
285 extern GElf_Verneed *gelf_getverneed (Elf_Data *__data, int __offset,
286 GElf_Verneed *__dst);
288 /* Update required symbol version information. */
289 extern int gelf_update_verneed (Elf_Data *__data, int __offset,
290 GElf_Verneed *__src);
292 /* Retrieve additional required symbol version information at given offset. */
293 extern GElf_Vernaux *gelf_getvernaux (Elf_Data *__data, int __offset,
294 GElf_Vernaux *__dst);
296 /* Update additional required symbol version information. */
297 extern int gelf_update_vernaux (Elf_Data *__data, int __offset,
298 GElf_Vernaux *__src);
301 /* Retrieve symbol version definition information at given offset. */
302 extern GElf_Verdef *gelf_getverdef (Elf_Data *__data, int __offset,
305 /* Update symbol version definition information. */
306 extern int gelf_update_verdef (Elf_Data *__data, int __offset,
309 /* Retrieve additional symbol version definition information at given
311 extern GElf_Verdaux *gelf_getverdaux (Elf_Data *__data, int __offset,
312 GElf_Verdaux *__dst);
314 /* Update additional symbol version definition information. */
315 extern int gelf_update_verdaux (Elf_Data *__data, int __offset,
316 GElf_Verdaux *__src);
319 /* Get auxv entry at the given index. */
320 extern GElf_auxv_t *gelf_getauxv (Elf_Data *__data, int __ndx,
323 /* Update auxv entry at the given index. */
324 extern int gelf_update_auxv (Elf_Data *__data, int __ndx, GElf_auxv_t *__src);
327 /* Get note header at the given offset into the data, and the offsets of
328 the note's name and descriptor data. Returns the offset of the next
329 note header, or 0 for an invalid offset or corrupt note header. */
330 extern size_t gelf_getnote (Elf_Data *__data, size_t __offset,
332 size_t *__name_offset, size_t *__desc_offset);
335 /* Compute simple checksum from permanent parts of the ELF file. */
336 extern long int gelf_checksum (Elf *__elf);