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 (at) 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 <libintl.h> 36 #include <stdbool.h> 37 #include <stdint.h> 38 #include <stdlib.h> 39 40 #include "libelfP.h" 41 42 43 /* The error number. */ 44 static __thread int global_error; 45 46 47 int 48 elf_errno (void) 49 { 50 int result = global_error; 51 global_error = ELF_E_NOERROR; 52 return result; 53 } 54 55 56 /* Return the appropriate message for the error. */ 57 static const char msgstr[] = 58 { 59 #define ELF_E_NOERROR_IDX 0 60 N_("no error") 61 "\0" 62 #define ELF_E_UNKNOWN_ERROR_IDX (ELF_E_NOERROR_IDX + sizeof "no error") 63 N_("unknown error") 64 "\0" 65 #define ELF_E_UNKNOWN_VERSION_IDX \ 66 (ELF_E_UNKNOWN_ERROR_IDX + sizeof "unknown error") 67 N_("unknown version") 68 "\0" 69 #define ELF_E_UNKNOWN_TYPE_IDX \ 70 (ELF_E_UNKNOWN_VERSION_IDX + sizeof "unknown version") 71 N_("unknown type") 72 "\0" 73 #define ELF_E_INVALID_HANDLE_IDX \ 74 (ELF_E_UNKNOWN_TYPE_IDX + sizeof "unknown type") 75 N_("invalid `Elf' handle") 76 "\0" 77 #define ELF_E_SOURCE_SIZE_IDX \ 78 (ELF_E_INVALID_HANDLE_IDX + sizeof "invalid `Elf' handle") 79 N_("invalid size of source operand") 80 "\0" 81 #define ELF_E_DEST_SIZE_IDX \ 82 (ELF_E_SOURCE_SIZE_IDX + sizeof "invalid size of source operand") 83 N_("invalid size of destination operand") 84 "\0" 85 #define ELF_E_INVALID_ENCODING_IDX \ 86 (ELF_E_DEST_SIZE_IDX + sizeof "invalid size of destination operand") 87 N_("invalid encoding") 88 "\0" 89 #define ELF_E_NOMEM_IDX \ 90 (ELF_E_INVALID_ENCODING_IDX + sizeof "invalid encoding") 91 N_("out of memory") 92 "\0" 93 #define ELF_E_INVALID_FILE_IDX \ 94 (ELF_E_NOMEM_IDX + sizeof "out of memory") 95 N_("invalid file descriptor") 96 "\0" 97 #define ELF_E_INVALID_ELF_IDX \ 98 (ELF_E_INVALID_FILE_IDX + sizeof "invalid file descriptor") 99 N_("invalid ELF file data") 100 "\0" 101 #define ELF_E_INVALID_OP_IDX \ 102 (ELF_E_INVALID_ELF_IDX + sizeof "invalid ELF file data") 103 N_("invalid operation") 104 "\0" 105 #define ELF_E_NO_VERSION_IDX \ 106 (ELF_E_INVALID_OP_IDX + sizeof "invalid operation") 107 N_("ELF version not set") 108 "\0" 109 #define ELF_E_INVALID_CMD_IDX \ 110 (ELF_E_NO_VERSION_IDX + sizeof "ELF version not set") 111 N_("invalid command") 112 "\0" 113 #define ELF_E_RANGE_IDX \ 114 (ELF_E_INVALID_CMD_IDX + sizeof "invalid command") 115 N_("offset out of range") 116 "\0" 117 #define ELF_E_ARCHIVE_FMAG_IDX \ 118 (ELF_E_RANGE_IDX + sizeof "offset out of range") 119 N_("invalid fmag field in archive header") 120 "\0" 121 #define ELF_E_INVALID_ARCHIVE_IDX \ 122 (ELF_E_ARCHIVE_FMAG_IDX + sizeof "invalid fmag field in archive header") 123 N_("invalid archive file") 124 "\0" 125 #define ELF_E_NO_ARCHIVE_IDX \ 126 (ELF_E_INVALID_ARCHIVE_IDX + sizeof "invalid archive file") 127 N_("descriptor is not for an archive") 128 "\0" 129 #define ELF_E_NO_INDEX_IDX \ 130 (ELF_E_NO_ARCHIVE_IDX + sizeof "descriptor is not for an archive") 131 N_("no index available") 132 "\0" 133 #define ELF_E_READ_ERROR_IDX \ 134 (ELF_E_NO_INDEX_IDX + sizeof "no index available") 135 N_("cannot read data from file") 136 "\0" 137 #define ELF_E_WRITE_ERROR_IDX \ 138 (ELF_E_READ_ERROR_IDX + sizeof "cannot read data from file") 139 N_("cannot write data to file") 140 "\0" 141 #define ELF_E_INVALID_CLASS_IDX \ 142 (ELF_E_WRITE_ERROR_IDX + sizeof "cannot write data to file") 143 N_("invalid binary class") 144 "\0" 145 #define ELF_E_INVALID_INDEX_IDX \ 146 (ELF_E_INVALID_CLASS_IDX + sizeof "invalid binary class") 147 N_("invalid section index") 148 "\0" 149 #define ELF_E_INVALID_OPERAND_IDX \ 150 (ELF_E_INVALID_INDEX_IDX + sizeof "invalid section index") 151 N_("invalid operand") 152 "\0" 153 #define ELF_E_INVALID_SECTION_IDX \ 154 (ELF_E_INVALID_OPERAND_IDX + sizeof "invalid operand") 155 N_("invalid section") 156 "\0" 157 #define ELF_E_INVALID_COMMAND_IDX \ 158 (ELF_E_INVALID_SECTION_IDX + sizeof "invalid section") 159 N_("invalid command") 160 "\0" 161 #define ELF_E_WRONG_ORDER_EHDR_IDX \ 162 (ELF_E_INVALID_COMMAND_IDX + sizeof "invalid command") 163 N_("executable header not created first") 164 "\0" 165 #define ELF_E_FD_DISABLED_IDX \ 166 (ELF_E_WRONG_ORDER_EHDR_IDX + sizeof "executable header not created first") 167 N_("file descriptor disabled") 168 "\0" 169 #define ELF_E_FD_MISMATCH_IDX \ 170 (ELF_E_FD_DISABLED_IDX + sizeof "file descriptor disabled") 171 N_("archive/member file descriptor mismatch") 172 "\0" 173 #define ELF_E_OFFSET_RANGE_IDX \ 174 (ELF_E_FD_MISMATCH_IDX + sizeof "archive/member file descriptor mismatch") 175 N_("offset out of range") 176 "\0" 177 #define ELF_E_NOT_NUL_SECTION_IDX \ 178 (ELF_E_OFFSET_RANGE_IDX + sizeof "offset out of range") 179 N_("cannot manipulate null section") 180 "\0" 181 #define ELF_E_DATA_MISMATCH_IDX \ 182 (ELF_E_NOT_NUL_SECTION_IDX + sizeof "cannot manipulate null section") 183 N_("data/scn mismatch") 184 "\0" 185 #define ELF_E_INVALID_SECTION_HEADER_IDX \ 186 (ELF_E_DATA_MISMATCH_IDX + sizeof "data/scn mismatch") 187 N_("invalid section header") 188 "\0" 189 #define ELF_E_INVALID_DATA_IDX \ 190 (ELF_E_INVALID_SECTION_HEADER_IDX + sizeof "invalid section header") 191 N_("invalid data") 192 "\0" 193 #define ELF_E_DATA_ENCODING_IDX \ 194 (ELF_E_INVALID_DATA_IDX + sizeof "invalid data") 195 N_("unknown data encoding") 196 "\0" 197 #define ELF_E_SECTION_TOO_SMALL_IDX \ 198 (ELF_E_DATA_ENCODING_IDX + sizeof "unknown data encoding") 199 N_("section `sh_size' too small for data") 200 "\0" 201 #define ELF_E_INVALID_ALIGN_IDX \ 202 (ELF_E_SECTION_TOO_SMALL_IDX + sizeof "section `sh_size' too small for data") 203 N_("invalid section alignment") 204 "\0" 205 #define ELF_E_INVALID_SHENTSIZE_IDX \ 206 (ELF_E_INVALID_ALIGN_IDX + sizeof "invalid section alignment") 207 N_("invalid section entry size") 208 "\0" 209 #define ELF_E_UPDATE_RO_IDX \ 210 (ELF_E_INVALID_SHENTSIZE_IDX + sizeof "invalid section entry size") 211 N_("update() for write on read-only file") 212 "\0" 213 #define ELF_E_NOFILE_IDX \ 214 (ELF_E_UPDATE_RO_IDX + sizeof "update() for write on read-only file") 215 N_("no such file") 216 "\0" 217 #define ELF_E_GROUP_NOT_REL_IDX \ 218 (ELF_E_NOFILE_IDX + sizeof "no such file") 219 N_("only relocatable files can contain section groups") 220 "\0" 221 #define ELF_E_INVALID_PHDR_IDX \ 222 (ELF_E_GROUP_NOT_REL_IDX \ 223 + sizeof "only relocatable files can contain section groups") 224 N_("program header only allowed in executables, shared objects, and \ 225 core files") 226 "\0" 227 #define ELF_E_NO_PHDR_IDX \ 228 (ELF_E_INVALID_PHDR_IDX \ 229 + sizeof "program header only allowed in executables, shared objects, and \ 230 core files") 231 N_("file has no program header") 232 "\0" 233 #define ELF_E_INVALID_OFFSET_IDX \ 234 (ELF_E_NO_PHDR_IDX \ 235 + sizeof "file has no program header") 236 N_("invalid offset") 237 "\0" 238 #define ELF_E_INVALID_SECTION_TYPE_IDX \ 239 (ELF_E_INVALID_OFFSET_IDX \ 240 + sizeof "invalid offset") 241 N_("invalid section type") 242 "\0" 243 #define ELF_E_INVALID_SECTION_FLAGS_IDX \ 244 (ELF_E_INVALID_SECTION_TYPE_IDX \ 245 + sizeof "invalid section type") 246 N_("invalid section flags") 247 "\0" 248 #define ELF_E_NOT_COMPRESSED_IDX \ 249 (ELF_E_INVALID_SECTION_FLAGS_IDX \ 250 + sizeof "invalid section flags") 251 N_("section does not contain compressed data") 252 "\0" 253 #define ELF_E_ALREADY_COMPRESSED_IDX \ 254 (ELF_E_NOT_COMPRESSED_IDX \ 255 + sizeof "section does not contain compressed data") 256 N_("section contains compressed data") 257 "\0" 258 #define ELF_E_UNKNOWN_COMPRESSION_TYPE_IDX \ 259 (ELF_E_ALREADY_COMPRESSED_IDX \ 260 + sizeof "section contains compressed data") 261 N_("unknown compression type") 262 "\0" 263 #define ELF_E_COMPRESS_ERROR_IDX \ 264 (ELF_E_UNKNOWN_COMPRESSION_TYPE_IDX \ 265 + sizeof "unknown compression type") 266 N_("cannot compress data") 267 "\0" 268 #define ELF_E_DECOMPRESS_ERROR_IDX \ 269 (ELF_E_COMPRESS_ERROR_IDX \ 270 + sizeof "cannot compress data") 271 N_("cannot decompress data") 272 }; 273 274 275 static const uint_fast16_t msgidx[ELF_E_NUM] = 276 { 277 [ELF_E_NOERROR] = ELF_E_NOERROR_IDX, 278 [ELF_E_UNKNOWN_ERROR] = ELF_E_UNKNOWN_ERROR_IDX, 279 [ELF_E_UNKNOWN_VERSION] = ELF_E_UNKNOWN_VERSION_IDX, 280 [ELF_E_UNKNOWN_TYPE] = ELF_E_UNKNOWN_TYPE_IDX, 281 [ELF_E_INVALID_HANDLE] = ELF_E_INVALID_HANDLE_IDX, 282 [ELF_E_SOURCE_SIZE] = ELF_E_SOURCE_SIZE_IDX, 283 [ELF_E_DEST_SIZE] = ELF_E_DEST_SIZE_IDX, 284 [ELF_E_INVALID_ENCODING] = ELF_E_INVALID_ENCODING_IDX, 285 [ELF_E_NOMEM] = ELF_E_NOMEM_IDX, 286 [ELF_E_INVALID_FILE] = ELF_E_INVALID_FILE_IDX, 287 [ELF_E_INVALID_ELF] = ELF_E_INVALID_ELF_IDX, 288 [ELF_E_INVALID_OP] = ELF_E_INVALID_OP_IDX, 289 [ELF_E_NO_VERSION] = ELF_E_NO_VERSION_IDX, 290 [ELF_E_INVALID_CMD] = ELF_E_INVALID_CMD_IDX, 291 [ELF_E_RANGE] = ELF_E_RANGE_IDX, 292 [ELF_E_ARCHIVE_FMAG] = ELF_E_ARCHIVE_FMAG_IDX, 293 [ELF_E_INVALID_ARCHIVE] = ELF_E_INVALID_ARCHIVE_IDX, 294 [ELF_E_NO_ARCHIVE] = ELF_E_NO_ARCHIVE_IDX, 295 [ELF_E_NO_INDEX] = ELF_E_NO_INDEX_IDX, 296 [ELF_E_READ_ERROR] = ELF_E_READ_ERROR_IDX, 297 [ELF_E_WRITE_ERROR] = ELF_E_WRITE_ERROR_IDX, 298 [ELF_E_INVALID_CLASS] = ELF_E_INVALID_CLASS_IDX, 299 [ELF_E_INVALID_INDEX] = ELF_E_INVALID_INDEX_IDX, 300 [ELF_E_INVALID_OPERAND] = ELF_E_INVALID_OPERAND_IDX, 301 [ELF_E_INVALID_SECTION] = ELF_E_INVALID_SECTION_IDX, 302 [ELF_E_INVALID_COMMAND] = ELF_E_INVALID_COMMAND_IDX, 303 [ELF_E_WRONG_ORDER_EHDR] = ELF_E_WRONG_ORDER_EHDR_IDX, 304 [ELF_E_FD_DISABLED] = ELF_E_FD_DISABLED_IDX, 305 [ELF_E_FD_MISMATCH] = ELF_E_FD_MISMATCH_IDX, 306 [ELF_E_OFFSET_RANGE] = ELF_E_OFFSET_RANGE_IDX, 307 [ELF_E_NOT_NUL_SECTION] = ELF_E_NOT_NUL_SECTION_IDX, 308 [ELF_E_DATA_MISMATCH] = ELF_E_DATA_MISMATCH_IDX, 309 [ELF_E_INVALID_SECTION_HEADER] = ELF_E_INVALID_SECTION_HEADER_IDX, 310 [ELF_E_INVALID_DATA] = ELF_E_INVALID_DATA_IDX, 311 [ELF_E_DATA_ENCODING] = ELF_E_DATA_ENCODING_IDX, 312 [ELF_E_SECTION_TOO_SMALL] = ELF_E_SECTION_TOO_SMALL_IDX, 313 [ELF_E_INVALID_ALIGN] = ELF_E_INVALID_ALIGN_IDX, 314 [ELF_E_INVALID_SHENTSIZE] = ELF_E_INVALID_SHENTSIZE_IDX, 315 [ELF_E_UPDATE_RO] = ELF_E_UPDATE_RO_IDX, 316 [ELF_E_NOFILE] = ELF_E_NOFILE_IDX, 317 [ELF_E_GROUP_NOT_REL] = ELF_E_GROUP_NOT_REL_IDX, 318 [ELF_E_INVALID_PHDR] = ELF_E_INVALID_PHDR_IDX, 319 [ELF_E_NO_PHDR] = ELF_E_NO_PHDR_IDX, 320 [ELF_E_INVALID_OFFSET] = ELF_E_INVALID_OFFSET_IDX, 321 [ELF_E_INVALID_SECTION_TYPE] = ELF_E_INVALID_SECTION_TYPE_IDX, 322 [ELF_E_INVALID_SECTION_FLAGS] = ELF_E_INVALID_SECTION_FLAGS_IDX, 323 [ELF_E_NOT_COMPRESSED] = ELF_E_NOT_COMPRESSED_IDX, 324 [ELF_E_ALREADY_COMPRESSED] = ELF_E_ALREADY_COMPRESSED_IDX, 325 [ELF_E_UNKNOWN_COMPRESSION_TYPE] = ELF_E_UNKNOWN_COMPRESSION_TYPE_IDX, 326 [ELF_E_COMPRESS_ERROR] = ELF_E_COMPRESS_ERROR_IDX, 327 [ELF_E_DECOMPRESS_ERROR] = ELF_E_DECOMPRESS_ERROR_IDX 328 }; 329 #define nmsgidx ((int) (sizeof (msgidx) / sizeof (msgidx[0]))) 330 331 332 void 333 internal_function 334 __libelf_seterrno (int value) 335 { 336 global_error = value >= 0 && value < nmsgidx ? value : ELF_E_UNKNOWN_ERROR; 337 } 338 339 340 const char * 341 elf_errmsg (int error) 342 { 343 int last_error = global_error; 344 345 if (error == 0) 346 { 347 assert (msgidx[last_error] < sizeof (msgstr)); 348 return last_error != 0 ? _(msgstr + msgidx[last_error]) : NULL; 349 } 350 else if (error < -1 || error >= nmsgidx) 351 return _(msgstr + ELF_E_UNKNOWN_ERROR_IDX); 352 353 assert (msgidx[error == -1 ? last_error : error] < sizeof (msgstr)); 354 return _(msgstr + msgidx[error == -1 ? last_error : error]); 355 } 356
