1 /* Error handling in libelf.
2 Copyright (C) 1998-2010, 2015 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Ulrich Drepper <drepper@redhat.com>, 1998.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of either
8
9 * the GNU Lesser General Public License as published by the Free
10 Software Foundation; either version 3 of the License, or (at
11 your option) any later version
12
13 or
14
15 * the GNU General Public License as published by the Free
16 Software Foundation; either version 2 of the License, or (at
17 your option) any later version
18
19 or both in parallel, as here.
20
21 elfutils is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
25
26 You should have received copies of the GNU General Public License and
27 the GNU Lesser General Public License along with this program. If
28 not, see <http://www.gnu.org/licenses/>. */
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <assert.h>
35 #include <stdbool.h>
36 #include <stdint.h>
37 #include <stdlib.h>
38
39 #include "libelfP.h"
40
41
42 /* The error number. */
43 static __thread int global_error;
44
45
46 int
elf_errno(void)47 elf_errno (void)
48 {
49 int result = global_error;
50 global_error = ELF_E_NOERROR;
51 return result;
52 }
53
54
55 /* Return the appropriate message for the error. */
56 static const char msgstr[] =
57 {
58 #define ELF_E_NOERROR_IDX 0
59 N_("no error")
60 "\0"
61 #define ELF_E_UNKNOWN_ERROR_IDX (ELF_E_NOERROR_IDX + sizeof "no error")
62 N_("unknown error")
63 "\0"
64 #define ELF_E_UNKNOWN_VERSION_IDX \
65 (ELF_E_UNKNOWN_ERROR_IDX + sizeof "unknown error")
66 N_("unknown version")
67 "\0"
68 #define ELF_E_UNKNOWN_TYPE_IDX \
69 (ELF_E_UNKNOWN_VERSION_IDX + sizeof "unknown version")
70 N_("unknown type")
71 "\0"
72 #define ELF_E_INVALID_HANDLE_IDX \
73 (ELF_E_UNKNOWN_TYPE_IDX + sizeof "unknown type")
74 N_("invalid `Elf' handle")
75 "\0"
76 #define ELF_E_SOURCE_SIZE_IDX \
77 (ELF_E_INVALID_HANDLE_IDX + sizeof "invalid `Elf' handle")
78 N_("invalid size of source operand")
79 "\0"
80 #define ELF_E_DEST_SIZE_IDX \
81 (ELF_E_SOURCE_SIZE_IDX + sizeof "invalid size of source operand")
82 N_("invalid size of destination operand")
83 "\0"
84 #define ELF_E_INVALID_ENCODING_IDX \
85 (ELF_E_DEST_SIZE_IDX + sizeof "invalid size of destination operand")
86 N_("invalid encoding")
87 "\0"
88 #define ELF_E_NOMEM_IDX \
89 (ELF_E_INVALID_ENCODING_IDX + sizeof "invalid encoding")
90 N_("out of memory")
91 "\0"
92 #define ELF_E_INVALID_FILE_IDX \
93 (ELF_E_NOMEM_IDX + sizeof "out of memory")
94 N_("invalid file descriptor")
95 "\0"
96 #define ELF_E_INVALID_ELF_IDX \
97 (ELF_E_INVALID_FILE_IDX + sizeof "invalid file descriptor")
98 N_("invalid ELF file data")
99 "\0"
100 #define ELF_E_INVALID_OP_IDX \
101 (ELF_E_INVALID_ELF_IDX + sizeof "invalid ELF file data")
102 N_("invalid operation")
103 "\0"
104 #define ELF_E_NO_VERSION_IDX \
105 (ELF_E_INVALID_OP_IDX + sizeof "invalid operation")
106 N_("ELF version not set")
107 "\0"
108 #define ELF_E_INVALID_CMD_IDX \
109 (ELF_E_NO_VERSION_IDX + sizeof "ELF version not set")
110 N_("invalid command")
111 "\0"
112 #define ELF_E_RANGE_IDX \
113 (ELF_E_INVALID_CMD_IDX + sizeof "invalid command")
114 N_("offset out of range")
115 "\0"
116 #define ELF_E_ARCHIVE_FMAG_IDX \
117 (ELF_E_RANGE_IDX + sizeof "offset out of range")
118 N_("invalid fmag field in archive header")
119 "\0"
120 #define ELF_E_INVALID_ARCHIVE_IDX \
121 (ELF_E_ARCHIVE_FMAG_IDX + sizeof "invalid fmag field in archive header")
122 N_("invalid archive file")
123 "\0"
124 #define ELF_E_NO_ARCHIVE_IDX \
125 (ELF_E_INVALID_ARCHIVE_IDX + sizeof "invalid archive file")
126 N_("descriptor is not for an archive")
127 "\0"
128 #define ELF_E_NO_INDEX_IDX \
129 (ELF_E_NO_ARCHIVE_IDX + sizeof "descriptor is not for an archive")
130 N_("no index available")
131 "\0"
132 #define ELF_E_READ_ERROR_IDX \
133 (ELF_E_NO_INDEX_IDX + sizeof "no index available")
134 N_("cannot read data from file")
135 "\0"
136 #define ELF_E_WRITE_ERROR_IDX \
137 (ELF_E_READ_ERROR_IDX + sizeof "cannot read data from file")
138 N_("cannot write data to file")
139 "\0"
140 #define ELF_E_INVALID_CLASS_IDX \
141 (ELF_E_WRITE_ERROR_IDX + sizeof "cannot write data to file")
142 N_("invalid binary class")
143 "\0"
144 #define ELF_E_INVALID_INDEX_IDX \
145 (ELF_E_INVALID_CLASS_IDX + sizeof "invalid binary class")
146 N_("invalid section index")
147 "\0"
148 #define ELF_E_INVALID_OPERAND_IDX \
149 (ELF_E_INVALID_INDEX_IDX + sizeof "invalid section index")
150 N_("invalid operand")
151 "\0"
152 #define ELF_E_INVALID_SECTION_IDX \
153 (ELF_E_INVALID_OPERAND_IDX + sizeof "invalid operand")
154 N_("invalid section")
155 "\0"
156 #define ELF_E_INVALID_COMMAND_IDX \
157 (ELF_E_INVALID_SECTION_IDX + sizeof "invalid section")
158 N_("invalid command")
159 "\0"
160 #define ELF_E_WRONG_ORDER_EHDR_IDX \
161 (ELF_E_INVALID_COMMAND_IDX + sizeof "invalid command")
162 N_("executable header not created first")
163 "\0"
164 #define ELF_E_FD_DISABLED_IDX \
165 (ELF_E_WRONG_ORDER_EHDR_IDX + sizeof "executable header not created first")
166 N_("file descriptor disabled")
167 "\0"
168 #define ELF_E_FD_MISMATCH_IDX \
169 (ELF_E_FD_DISABLED_IDX + sizeof "file descriptor disabled")
170 N_("archive/member file descriptor mismatch")
171 "\0"
172 #define ELF_E_OFFSET_RANGE_IDX \
173 (ELF_E_FD_MISMATCH_IDX + sizeof "archive/member file descriptor mismatch")
174 N_("offset out of range")
175 "\0"
176 #define ELF_E_NOT_NUL_SECTION_IDX \
177 (ELF_E_OFFSET_RANGE_IDX + sizeof "offset out of range")
178 N_("cannot manipulate null section")
179 "\0"
180 #define ELF_E_DATA_MISMATCH_IDX \
181 (ELF_E_NOT_NUL_SECTION_IDX + sizeof "cannot manipulate null section")
182 N_("data/scn mismatch")
183 "\0"
184 #define ELF_E_INVALID_SECTION_HEADER_IDX \
185 (ELF_E_DATA_MISMATCH_IDX + sizeof "data/scn mismatch")
186 N_("invalid section header")
187 "\0"
188 #define ELF_E_INVALID_DATA_IDX \
189 (ELF_E_INVALID_SECTION_HEADER_IDX + sizeof "invalid section header")
190 N_("invalid data")
191 "\0"
192 #define ELF_E_DATA_ENCODING_IDX \
193 (ELF_E_INVALID_DATA_IDX + sizeof "invalid data")
194 N_("unknown data encoding")
195 "\0"
196 #define ELF_E_SECTION_TOO_SMALL_IDX \
197 (ELF_E_DATA_ENCODING_IDX + sizeof "unknown data encoding")
198 N_("section `sh_size' too small for data")
199 "\0"
200 #define ELF_E_INVALID_ALIGN_IDX \
201 (ELF_E_SECTION_TOO_SMALL_IDX + sizeof "section `sh_size' too small for data")
202 N_("invalid section alignment")
203 "\0"
204 #define ELF_E_INVALID_SHENTSIZE_IDX \
205 (ELF_E_INVALID_ALIGN_IDX + sizeof "invalid section alignment")
206 N_("invalid section entry size")
207 "\0"
208 #define ELF_E_UPDATE_RO_IDX \
209 (ELF_E_INVALID_SHENTSIZE_IDX + sizeof "invalid section entry size")
210 N_("update() for write on read-only file")
211 "\0"
212 #define ELF_E_NOFILE_IDX \
213 (ELF_E_UPDATE_RO_IDX + sizeof "update() for write on read-only file")
214 N_("no such file")
215 "\0"
216 #define ELF_E_GROUP_NOT_REL_IDX \
217 (ELF_E_NOFILE_IDX + sizeof "no such file")
218 N_("only relocatable files can contain section groups")
219 "\0"
220 #define ELF_E_INVALID_PHDR_IDX \
221 (ELF_E_GROUP_NOT_REL_IDX \
222 + sizeof "only relocatable files can contain section groups")
223 N_("program header only allowed in executables, shared objects, and \
224 core files")
225 "\0"
226 #define ELF_E_NO_PHDR_IDX \
227 (ELF_E_INVALID_PHDR_IDX \
228 + sizeof "program header only allowed in executables, shared objects, and \
229 core files")
230 N_("file has no program header")
231 "\0"
232 #define ELF_E_INVALID_OFFSET_IDX \
233 (ELF_E_NO_PHDR_IDX \
234 + sizeof "file has no program header")
235 N_("invalid offset")
236 "\0"
237 #define ELF_E_INVALID_SECTION_TYPE_IDX \
238 (ELF_E_INVALID_OFFSET_IDX \
239 + sizeof "invalid offset")
240 N_("invalid section type")
241 "\0"
242 #define ELF_E_INVALID_SECTION_FLAGS_IDX \
243 (ELF_E_INVALID_SECTION_TYPE_IDX \
244 + sizeof "invalid section type")
245 N_("invalid section flags")
246 "\0"
247 #define ELF_E_NOT_COMPRESSED_IDX \
248 (ELF_E_INVALID_SECTION_FLAGS_IDX \
249 + sizeof "invalid section flags")
250 N_("section does not contain compressed data")
251 "\0"
252 #define ELF_E_ALREADY_COMPRESSED_IDX \
253 (ELF_E_NOT_COMPRESSED_IDX \
254 + sizeof "section does not contain compressed data")
255 N_("section contains compressed data")
256 "\0"
257 #define ELF_E_UNKNOWN_COMPRESSION_TYPE_IDX \
258 (ELF_E_ALREADY_COMPRESSED_IDX \
259 + sizeof "section contains compressed data")
260 N_("unknown compression type")
261 "\0"
262 #define ELF_E_COMPRESS_ERROR_IDX \
263 (ELF_E_UNKNOWN_COMPRESSION_TYPE_IDX \
264 + sizeof "unknown compression type")
265 N_("cannot compress data")
266 "\0"
267 #define ELF_E_DECOMPRESS_ERROR_IDX \
268 (ELF_E_COMPRESS_ERROR_IDX \
269 + sizeof "cannot compress data")
270 N_("cannot decompress data")
271 };
272
273
274 static const uint_fast16_t msgidx[ELF_E_NUM] =
275 {
276 [ELF_E_NOERROR] = ELF_E_NOERROR_IDX,
277 [ELF_E_UNKNOWN_ERROR] = ELF_E_UNKNOWN_ERROR_IDX,
278 [ELF_E_UNKNOWN_VERSION] = ELF_E_UNKNOWN_VERSION_IDX,
279 [ELF_E_UNKNOWN_TYPE] = ELF_E_UNKNOWN_TYPE_IDX,
280 [ELF_E_INVALID_HANDLE] = ELF_E_INVALID_HANDLE_IDX,
281 [ELF_E_SOURCE_SIZE] = ELF_E_SOURCE_SIZE_IDX,
282 [ELF_E_DEST_SIZE] = ELF_E_DEST_SIZE_IDX,
283 [ELF_E_INVALID_ENCODING] = ELF_E_INVALID_ENCODING_IDX,
284 [ELF_E_NOMEM] = ELF_E_NOMEM_IDX,
285 [ELF_E_INVALID_FILE] = ELF_E_INVALID_FILE_IDX,
286 [ELF_E_INVALID_ELF] = ELF_E_INVALID_ELF_IDX,
287 [ELF_E_INVALID_OP] = ELF_E_INVALID_OP_IDX,
288 [ELF_E_NO_VERSION] = ELF_E_NO_VERSION_IDX,
289 [ELF_E_INVALID_CMD] = ELF_E_INVALID_CMD_IDX,
290 [ELF_E_RANGE] = ELF_E_RANGE_IDX,
291 [ELF_E_ARCHIVE_FMAG] = ELF_E_ARCHIVE_FMAG_IDX,
292 [ELF_E_INVALID_ARCHIVE] = ELF_E_INVALID_ARCHIVE_IDX,
293 [ELF_E_NO_ARCHIVE] = ELF_E_NO_ARCHIVE_IDX,
294 [ELF_E_NO_INDEX] = ELF_E_NO_INDEX_IDX,
295 [ELF_E_READ_ERROR] = ELF_E_READ_ERROR_IDX,
296 [ELF_E_WRITE_ERROR] = ELF_E_WRITE_ERROR_IDX,
297 [ELF_E_INVALID_CLASS] = ELF_E_INVALID_CLASS_IDX,
298 [ELF_E_INVALID_INDEX] = ELF_E_INVALID_INDEX_IDX,
299 [ELF_E_INVALID_OPERAND] = ELF_E_INVALID_OPERAND_IDX,
300 [ELF_E_INVALID_SECTION] = ELF_E_INVALID_SECTION_IDX,
301 [ELF_E_INVALID_COMMAND] = ELF_E_INVALID_COMMAND_IDX,
302 [ELF_E_WRONG_ORDER_EHDR] = ELF_E_WRONG_ORDER_EHDR_IDX,
303 [ELF_E_FD_DISABLED] = ELF_E_FD_DISABLED_IDX,
304 [ELF_E_FD_MISMATCH] = ELF_E_FD_MISMATCH_IDX,
305 [ELF_E_OFFSET_RANGE] = ELF_E_OFFSET_RANGE_IDX,
306 [ELF_E_NOT_NUL_SECTION] = ELF_E_NOT_NUL_SECTION_IDX,
307 [ELF_E_DATA_MISMATCH] = ELF_E_DATA_MISMATCH_IDX,
308 [ELF_E_INVALID_SECTION_HEADER] = ELF_E_INVALID_SECTION_HEADER_IDX,
309 [ELF_E_INVALID_DATA] = ELF_E_INVALID_DATA_IDX,
310 [ELF_E_DATA_ENCODING] = ELF_E_DATA_ENCODING_IDX,
311 [ELF_E_SECTION_TOO_SMALL] = ELF_E_SECTION_TOO_SMALL_IDX,
312 [ELF_E_INVALID_ALIGN] = ELF_E_INVALID_ALIGN_IDX,
313 [ELF_E_INVALID_SHENTSIZE] = ELF_E_INVALID_SHENTSIZE_IDX,
314 [ELF_E_UPDATE_RO] = ELF_E_UPDATE_RO_IDX,
315 [ELF_E_NOFILE] = ELF_E_NOFILE_IDX,
316 [ELF_E_GROUP_NOT_REL] = ELF_E_GROUP_NOT_REL_IDX,
317 [ELF_E_INVALID_PHDR] = ELF_E_INVALID_PHDR_IDX,
318 [ELF_E_NO_PHDR] = ELF_E_NO_PHDR_IDX,
319 [ELF_E_INVALID_OFFSET] = ELF_E_INVALID_OFFSET_IDX,
320 [ELF_E_INVALID_SECTION_TYPE] = ELF_E_INVALID_SECTION_TYPE_IDX,
321 [ELF_E_INVALID_SECTION_FLAGS] = ELF_E_INVALID_SECTION_FLAGS_IDX,
322 [ELF_E_NOT_COMPRESSED] = ELF_E_NOT_COMPRESSED_IDX,
323 [ELF_E_ALREADY_COMPRESSED] = ELF_E_ALREADY_COMPRESSED_IDX,
324 [ELF_E_UNKNOWN_COMPRESSION_TYPE] = ELF_E_UNKNOWN_COMPRESSION_TYPE_IDX,
325 [ELF_E_COMPRESS_ERROR] = ELF_E_COMPRESS_ERROR_IDX,
326 [ELF_E_DECOMPRESS_ERROR] = ELF_E_DECOMPRESS_ERROR_IDX
327 };
328 #define nmsgidx ((int) (sizeof (msgidx) / sizeof (msgidx[0])))
329
330
331 void
332 internal_function
__libelf_seterrno(int value)333 __libelf_seterrno (int value)
334 {
335 global_error = value >= 0 && value < nmsgidx ? value : ELF_E_UNKNOWN_ERROR;
336 }
337
338
339 const char *
elf_errmsg(int error)340 elf_errmsg (int error)
341 {
342 int last_error = global_error;
343
344 if (error == 0)
345 {
346 assert (msgidx[last_error] < sizeof (msgstr));
347 return last_error != 0 ? _(msgstr + msgidx[last_error]) : NULL;
348 }
349 else if (error < -1 || error >= nmsgidx)
350 return _(msgstr + ELF_E_UNKNOWN_ERROR_IDX);
351
352 assert (msgidx[error == -1 ? last_error : error] < sizeof (msgstr));
353 return _(msgstr + msgidx[error == -1 ? last_error : error]);
354 }
355