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1 /* This file defines generic ELF types, structures, and macros.
2    Copyright (C) 1999, 2000, 2001, 2002, 2004 Red Hat, Inc.
3 
4    This program is free software; you can redistribute it and/or modify
5    it under the terms of the GNU General Public License as published by
6    the Free Software Foundation, version 2.
7 
8    This program is distributed in the hope that it will be useful,
9    but WITHOUT ANY WARRANTY; without even the implied warranty of
10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11    GNU General Public License for more details.
12 
13    You should have received a copy of the GNU General Public License
14    along with this program; if not, write to the Free Software Foundation,
15    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
16 
17 #ifndef _GELF_H
18 #define	_GELF_H 1
19 
20 #include <libelf.h>
21 
22 
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26 
27 /* Class independent type definitions.  Correctly speaking this is not
28    true.  We assume that 64-bit binaries are the largest class and
29    therefore all other classes can be represented without loss.  */
30 
31 /* Type for a 16-bit quantity.  */
32 typedef Elf64_Half GElf_Half;
33 
34 /* Types for signed and unsigned 32-bit quantities.  */
35 typedef Elf64_Word GElf_Word;
36 typedef	Elf64_Sword GElf_Sword;
37 
38 /* Types for signed and unsigned 64-bit quantities.  */
39 typedef Elf64_Xword GElf_Xword;
40 typedef	Elf64_Sxword GElf_Sxword;
41 
42 /* Type of addresses.  */
43 typedef Elf64_Addr GElf_Addr;
44 
45 /* Type of file offsets.  */
46 typedef Elf64_Off GElf_Off;
47 
48 
49 /* The ELF file header.  This appears at the start of every ELF file.  */
50 typedef Elf64_Ehdr GElf_Ehdr;
51 
52 /* Section header.  */
53 typedef Elf64_Shdr GElf_Shdr;
54 
55 /* Section index.  */
56 /* XXX This should probably be a larger type in preparation of times when
57    regular section indices can be larger.  */
58 typedef Elf64_Section GElf_Section;
59 
60 /* Symbol table entry.  */
61 typedef Elf64_Sym GElf_Sym;
62 
63 /* The syminfo section if available contains additional information about
64    every dynamic symbol.  */
65 typedef Elf64_Syminfo GElf_Syminfo;
66 
67 /* Relocation table entry without addend (in section of type SHT_REL).  */
68 typedef Elf64_Rel GElf_Rel;
69 
70 /* Relocation table entry with addend (in section of type SHT_RELA).  */
71 typedef Elf64_Rela GElf_Rela;
72 
73 /* Program segment header.  */
74 typedef Elf64_Phdr GElf_Phdr;
75 
76 /* Dynamic section entry.  */
77 typedef Elf64_Dyn GElf_Dyn;
78 
79 
80 /* Version definition sections.  */
81 typedef Elf64_Verdef GElf_Verdef;
82 
83 /* Auxialiary version information.  */
84 typedef Elf64_Verdaux GElf_Verdaux;
85 
86 /* Version dependency section.  */
87 typedef Elf64_Verneed GElf_Verneed;
88 
89 /* Auxiliary needed version information.  */
90 typedef Elf64_Vernaux GElf_Vernaux;
91 
92 
93 /* Type for version symbol information.  */
94 typedef Elf64_Versym GElf_Versym;
95 
96 
97 /* Auxiliary vector.  */
98 typedef Elf64_auxv_t GElf_auxv_t;
99 
100 
101 /* Note section contents.  */
102 typedef Elf64_Nhdr GElf_Nhdr;
103 
104 
105 /* Move structure.  */
106 typedef Elf64_Move GElf_Move;
107 
108 
109 /* Library list structure.  */
110 typedef Elf64_Lib GElf_Lib;
111 
112 
113 /* How to extract and insert information held in the st_info field.  */
114 
115 #define GELF_ST_BIND(val)		ELF64_ST_BIND (val)
116 #define GELF_ST_TYPE(val)		ELF64_ST_TYPE (val)
117 #define GELF_ST_INFO(bind, type)	ELF64_ST_INFO (bind, type)
118 
119 /* How to extract information held in the st_other field.  */
120 
121 #define GELF_ST_VISIBILITY(val)		ELF64_ST_VISIBILITY (val)
122 
123 
124 /* How to extract and insert information held in the r_info field.  */
125 
126 #define GELF_R_SYM(info)		ELF64_R_SYM (info)
127 #define GELF_R_TYPE(info)		ELF64_R_TYPE (info)
128 #define GELF_R_INFO(sym, type)		ELF64_R_INFO (sym, type)
129 
130 
131 /* How to extract and insert information held in the m_info field.  */
132 #define GELF_M_SYM(info)		ELF64_M_SYM (info)
133 #define GELF_M_SIZE(info)		ELF64_M_SIZE (info)
134 #define GELF_M_INFO(sym, size)		ELF64_M_INFO (sym, size)
135 
136 
137 /* Get class of the file associated with ELF.  */
138 extern int gelf_getclass (Elf *__elf);
139 
140 
141 /* Return size of array of COUNT elemeents of the type denoted by TYPE
142    in the external representation.  The binary class is taken from ELF.
143    The result is based on version VERSION of the ELF standard.  */
144 extern size_t gelf_fsize (Elf *__elf, Elf_Type __type, size_t __count,
145 			  unsigned int __version);
146 
147 /* Retrieve object file header.  */
148 extern GElf_Ehdr *gelf_getehdr (Elf *__elf, GElf_Ehdr *__dest);
149 
150 /* Update the ELF header.  */
151 extern int gelf_update_ehdr (Elf *__elf, GElf_Ehdr *__src);
152 
153 /* Create new ELF header if none exists.  */
154 extern unsigned long int gelf_newehdr (Elf *__elf, int __class);
155 
156 /* Retrieve section header.  */
157 extern GElf_Shdr *gelf_getshdr (Elf_Scn *__scn, GElf_Shdr *__dst);
158 
159 /* Update section header.  */
160 extern int gelf_update_shdr (Elf_Scn *__scn, GElf_Shdr *__src);
161 
162 /* Retrieve program header table entry.  */
163 extern GElf_Phdr *gelf_getphdr (Elf *__elf, int __ndx, GElf_Phdr *__dst);
164 
165 /* Update the program header.  */
166 extern int gelf_update_phdr (Elf *__elf, int __ndx, GElf_Phdr *__src);
167 
168 /* Create new program header with PHNUM entries.  */
169 extern unsigned long int gelf_newphdr (Elf *__elf, size_t __phnum);
170 
171 
172 /* Convert data structure from the representation in the file represented
173    by ELF to their memory representation.  */
174 extern Elf_Data *gelf_xlatetom (Elf *__elf, Elf_Data *__dest,
175 				const Elf_Data *__src, unsigned int __encode);
176 
177 /* Convert data structure from to the representation in memory
178    represented by ELF file representation.  */
179 extern Elf_Data *gelf_xlatetof (Elf *__elf, Elf_Data *__dest,
180 				const Elf_Data *__src, unsigned int __encode);
181 
182 
183 /* Retrieve REL relocation info at the given index.  */
184 extern GElf_Rel *gelf_getrel (Elf_Data *__data, int __ndx, GElf_Rel *__dst);
185 
186 /* Retrieve RELA relocation info at the given index.  */
187 extern GElf_Rela *gelf_getrela (Elf_Data *__data, int __ndx, GElf_Rela *__dst);
188 
189 /* Update REL relocation information at given index.  */
190 extern int gelf_update_rel (Elf_Data *__dst, int __ndx, GElf_Rel *__src);
191 
192 /* Update RELA relocation information at given index.  */
193 extern int gelf_update_rela (Elf_Data *__dst, int __ndx, GElf_Rela *__src);
194 
195 
196 /* Retrieve symbol information from the symbol table at the given index.  */
197 extern GElf_Sym *gelf_getsym (Elf_Data *__data, int __ndx, GElf_Sym *__dst);
198 
199 /* Update symbol information in the symbol table at the given index.  */
200 extern int gelf_update_sym (Elf_Data *__data, int __ndx, GElf_Sym *__src);
201 
202 
203 /* Retrieve symbol information and separate section index from the
204    symbol table at the given index.  */
205 extern GElf_Sym *gelf_getsymshndx (Elf_Data *__symdata, Elf_Data *__shndxdata,
206 				   int __ndx, GElf_Sym *__sym,
207 				   Elf32_Word *__xshndx);
208 
209 /* Update symbol information and separate section index in the symbol
210    table at the given index.  */
211 extern int gelf_update_symshndx (Elf_Data *__symdata, Elf_Data *__shndxdata,
212 				 int __ndx, GElf_Sym *__sym,
213 				 Elf32_Word __xshndx);
214 
215 
216 /* Retrieve additional symbol information from the symbol table at the
217    given index.  */
218 extern GElf_Syminfo *gelf_getsyminfo (Elf_Data *__data, int __ndx,
219 				      GElf_Syminfo *__dst);
220 
221 /* Update additional symbol information in the symbol table at the
222    given index.  */
223 extern int gelf_update_syminfo (Elf_Data *__data, int __ndx,
224 				GElf_Syminfo *__src);
225 
226 
227 /* Get information from dynamic table at the given index.  */
228 extern GElf_Dyn *gelf_getdyn (Elf_Data *__data, int __ndx, GElf_Dyn *__dst);
229 
230 /* Update information in dynamic table at the given index.  */
231 extern int gelf_update_dyn (Elf_Data *__dst, int __ndx, GElf_Dyn *__src);
232 
233 
234 /* Get move structure at the given index.  */
235 extern GElf_Move *gelf_getmove (Elf_Data *__data, int __ndx, GElf_Move *__dst);
236 
237 /* Update move structure at the given index.  */
238 extern int gelf_update_move (Elf_Data *__data, int __ndx,
239 			     GElf_Move *__src);
240 
241 
242 /* Get library from table at the given index.  */
243 extern GElf_Lib *gelf_getlib (Elf_Data *__data, int __ndx, GElf_Lib *__dst);
244 
245 /* Update library in table at the given index.  */
246 extern int gelf_update_lib (Elf_Data *__data, int __ndx, GElf_Lib *__src);
247 
248 
249 
250 /* Retrieve symbol version information at given index.  */
251 extern GElf_Versym *gelf_getversym (Elf_Data *__data, int __ndx,
252 				    GElf_Versym *__dst);
253 
254 /* Update symbol version information.  */
255 extern int gelf_update_versym (Elf_Data *__data, int __ndx,
256 			       GElf_Versym *__src);
257 
258 
259 /* Retrieve required symbol version information at given offset.  */
260 extern GElf_Verneed *gelf_getverneed (Elf_Data *__data, int __offset,
261 				      GElf_Verneed *__dst);
262 
263 /* Update required symbol version information.  */
264 extern int gelf_update_verneed (Elf_Data *__data, int __offset,
265 				GElf_Verneed *__src);
266 
267 /* Retrieve additional required symbol version information at given offset.  */
268 extern GElf_Vernaux *gelf_getvernaux (Elf_Data *__data, int __offset,
269 				      GElf_Vernaux *__dst);
270 
271 /* Update additional required symbol version information.  */
272 extern int gelf_update_vernaux (Elf_Data *__data, int __offset,
273 				GElf_Vernaux *__src);
274 
275 
276 /* Retrieve symbol version definition information at given offset.  */
277 extern GElf_Verdef *gelf_getverdef (Elf_Data *__data, int __offset,
278 				    GElf_Verdef *__dst);
279 
280 /* Update symbol version definition information.  */
281 extern int gelf_update_verdef (Elf_Data *__data, int __offset,
282 			       GElf_Verdef *__src);
283 
284 /* Retrieve additional symbol version definition information at given
285    offset.  */
286 extern GElf_Verdaux *gelf_getverdaux (Elf_Data *__data, int __offset,
287 				      GElf_Verdaux *__dst);
288 
289 /* Update additional symbol version definition information.  */
290 extern int gelf_update_verdaux (Elf_Data *__data, int __offset,
291 				GElf_Verdaux *__src);
292 
293 
294 /* Retrieve uninterpreted chunk of the file contents.  */
295 extern char *gelf_rawchunk (Elf *__elf, GElf_Off __offset, GElf_Word __size);
296 
297 /* Release uninterpreted chunk of the file contents.  */
298 extern void gelf_freechunk (Elf *__elf, char *__ptr);
299 
300 #ifdef __cplusplus
301 }
302 #endif
303 
304 #endif	/* gelf.h */
305