1 /* Error handling in libelf. 2 Copyright (C) 1998-2010 Red Hat, Inc. 3 This file is part of Red Hat elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 1998. 5 6 Red Hat elfutils is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by the 8 Free Software Foundation; version 2 of the License. 9 10 Red Hat elfutils is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 General Public License for more details. 14 15 You should have received a copy of the GNU General Public License along 16 with Red Hat elfutils; if not, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 18 19 In addition, as a special exception, Red Hat, Inc. gives You the 20 additional right to link the code of Red Hat elfutils with code licensed 21 under any Open Source Initiative certified open source license 22 (http://www.opensource.org/licenses/index.php) which requires the 23 distribution of source code with any binary distribution and to 24 distribute linked combinations of the two. Non-GPL Code permitted under 25 this exception must only link to the code of Red Hat elfutils through 26 those well defined interfaces identified in the file named EXCEPTION 27 found in the source code files (the "Approved Interfaces"). The files 28 of Non-GPL Code may instantiate templates or use macros or inline 29 functions from the Approved Interfaces without causing the resulting 30 work to be covered by the GNU General Public License. Only Red Hat, 31 Inc. may make changes or additions to the list of Approved Interfaces. 32 Red Hat's grant of this exception is conditioned upon your not adding 33 any new exceptions. If you wish to add a new Approved Interface or 34 exception, please contact Red Hat. You must obey the GNU General Public 35 License in all respects for all of the Red Hat elfutils code and other 36 code used in conjunction with Red Hat elfutils except the Non-GPL Code 37 covered by this exception. If you modify this file, you may extend this 38 exception to your version of the file, but you are not obligated to do 39 so. If you do not wish to provide this exception without modification, 40 you must delete this exception statement from your version and license 41 this file solely under the GPL without exception. 42 43 Red Hat elfutils is an included package of the Open Invention Network. 44 An included package of the Open Invention Network is a package for which 45 Open Invention Network licensees cross-license their patents. No patent 46 license is granted, either expressly or impliedly, by designation as an 47 included package. Should you wish to participate in the Open Invention 48 Network licensing program, please visit www.openinventionnetwork.com 49 <http://www.openinventionnetwork.com>. */ 50 51 #ifdef HAVE_CONFIG_H 52 # include <config.h> 53 #endif 54 55 #include <assert.h> 56 #include <libintl.h> 57 #include <stdbool.h> 58 #include <stdint.h> 59 #include <stdlib.h> 60 61 #include "libelfP.h" 62 63 64 /* The error number. */ 65 #ifdef __APPLE__ 66 static int global_error; 67 #else 68 static __thread int global_error; 69 #endif 70 71 72 int 73 elf_errno (void) 74 { 75 int result = global_error; 76 global_error = ELF_E_NOERROR; 77 return result; 78 } 79 80 81 /* Return the appropriate message for the error. */ 82 static const char msgstr[] = 83 { 84 #define ELF_E_NOERROR_IDX 0 85 N_("no error") 86 "\0" 87 #define ELF_E_UNKNOWN_ERROR_IDX (ELF_E_NOERROR_IDX + sizeof "no error") 88 N_("unknown error") 89 "\0" 90 #define ELF_E_UNKNOWN_VERSION_IDX \ 91 (ELF_E_UNKNOWN_ERROR_IDX + sizeof "unknown error") 92 N_("unknown version") 93 "\0" 94 #define ELF_E_UNKNOWN_TYPE_IDX \ 95 (ELF_E_UNKNOWN_VERSION_IDX + sizeof "unknown version") 96 N_("unknown type") 97 "\0" 98 #define ELF_E_INVALID_HANDLE_IDX \ 99 (ELF_E_UNKNOWN_TYPE_IDX + sizeof "unknown type") 100 N_("invalid `Elf' handle") 101 "\0" 102 #define ELF_E_SOURCE_SIZE_IDX \ 103 (ELF_E_INVALID_HANDLE_IDX + sizeof "invalid `Elf' handle") 104 N_("invalid size of source operand") 105 "\0" 106 #define ELF_E_DEST_SIZE_IDX \ 107 (ELF_E_SOURCE_SIZE_IDX + sizeof "invalid size of source operand") 108 N_("invalid size of destination operand") 109 "\0" 110 #define ELF_E_INVALID_ENCODING_IDX \ 111 (ELF_E_DEST_SIZE_IDX + sizeof "invalid size of destination operand") 112 N_("invalid encoding") 113 "\0" 114 #define ELF_E_NOMEM_IDX \ 115 (ELF_E_INVALID_ENCODING_IDX + sizeof "invalid encoding") 116 N_("out of memory") 117 "\0" 118 #define ELF_E_INVALID_FILE_IDX \ 119 (ELF_E_NOMEM_IDX + sizeof "out of memory") 120 N_("invalid file descriptor") 121 "\0" 122 #define ELF_E_INVALID_OP_IDX \ 123 (ELF_E_INVALID_FILE_IDX + sizeof "invalid file descriptor") 124 N_("invalid operation") 125 "\0" 126 #define ELF_E_NO_VERSION_IDX \ 127 (ELF_E_INVALID_OP_IDX + sizeof "invalid operation") 128 N_("ELF version not set") 129 "\0" 130 #define ELF_E_INVALID_CMD_IDX \ 131 (ELF_E_NO_VERSION_IDX + sizeof "ELF version not set") 132 N_("invalid command") 133 "\0" 134 #define ELF_E_RANGE_IDX \ 135 (ELF_E_INVALID_CMD_IDX + sizeof "invalid command") 136 N_("offset out of range") 137 "\0" 138 #define ELF_E_ARCHIVE_FMAG_IDX \ 139 (ELF_E_RANGE_IDX + sizeof "offset out of range") 140 N_("invalid fmag field in archive header") 141 "\0" 142 #define ELF_E_INVALID_ARCHIVE_IDX \ 143 (ELF_E_ARCHIVE_FMAG_IDX + sizeof "invalid fmag field in archive header") 144 N_("invalid archive file") 145 "\0" 146 #define ELF_E_NO_ARCHIVE_IDX \ 147 (ELF_E_INVALID_ARCHIVE_IDX + sizeof "invalid archive file") 148 N_("descriptor is not for an archive") 149 "\0" 150 #define ELF_E_NO_INDEX_IDX \ 151 (ELF_E_NO_ARCHIVE_IDX + sizeof "descriptor is not for an archive") 152 N_("no index available") 153 "\0" 154 #define ELF_E_READ_ERROR_IDX \ 155 (ELF_E_NO_INDEX_IDX + sizeof "no index available") 156 N_("cannot read data from file") 157 "\0" 158 #define ELF_E_WRITE_ERROR_IDX \ 159 (ELF_E_READ_ERROR_IDX + sizeof "cannot read data from file") 160 N_("cannot write data to file") 161 "\0" 162 #define ELF_E_INVALID_CLASS_IDX \ 163 (ELF_E_WRITE_ERROR_IDX + sizeof "cannot write data to file") 164 N_("invalid binary class") 165 "\0" 166 #define ELF_E_INVALID_INDEX_IDX \ 167 (ELF_E_INVALID_CLASS_IDX + sizeof "invalid binary class") 168 N_("invalid section index") 169 "\0" 170 #define ELF_E_INVALID_OPERAND_IDX \ 171 (ELF_E_INVALID_INDEX_IDX + sizeof "invalid section index") 172 N_("invalid operand") 173 "\0" 174 #define ELF_E_INVALID_SECTION_IDX \ 175 (ELF_E_INVALID_OPERAND_IDX + sizeof "invalid operand") 176 N_("invalid section") 177 "\0" 178 #define ELF_E_INVALID_COMMAND_IDX \ 179 (ELF_E_INVALID_SECTION_IDX + sizeof "invalid section") 180 N_("invalid command") 181 "\0" 182 #define ELF_E_WRONG_ORDER_EHDR_IDX \ 183 (ELF_E_INVALID_COMMAND_IDX + sizeof "invalid command") 184 N_("executable header not created first") 185 "\0" 186 #define ELF_E_FD_DISABLED_IDX \ 187 (ELF_E_WRONG_ORDER_EHDR_IDX + sizeof "executable header not created first") 188 N_("file descriptor disabled") 189 "\0" 190 #define ELF_E_FD_MISMATCH_IDX \ 191 (ELF_E_FD_DISABLED_IDX + sizeof "file descriptor disabled") 192 N_("archive/member file descriptor mismatch") 193 "\0" 194 #define ELF_E_OFFSET_RANGE_IDX \ 195 (ELF_E_FD_MISMATCH_IDX + sizeof "archive/member file descriptor mismatch") 196 N_("offset out of range") 197 "\0" 198 #define ELF_E_NOT_NUL_SECTION_IDX \ 199 (ELF_E_OFFSET_RANGE_IDX + sizeof "offset out of range") 200 N_("cannot manipulate null section") 201 "\0" 202 #define ELF_E_DATA_MISMATCH_IDX \ 203 (ELF_E_NOT_NUL_SECTION_IDX + sizeof "cannot manipulate null section") 204 N_("data/scn mismatch") 205 "\0" 206 #define ELF_E_INVALID_SECTION_HEADER_IDX \ 207 (ELF_E_DATA_MISMATCH_IDX + sizeof "data/scn mismatch") 208 N_("invalid section header") 209 "\0" 210 #define ELF_E_INVALID_DATA_IDX \ 211 (ELF_E_INVALID_SECTION_HEADER_IDX + sizeof "invalid section header") 212 N_("invalid data") 213 "\0" 214 #define ELF_E_DATA_ENCODING_IDX \ 215 (ELF_E_INVALID_DATA_IDX + sizeof "invalid data") 216 N_("unknown data encoding") 217 "\0" 218 #define ELF_E_SECTION_TOO_SMALL_IDX \ 219 (ELF_E_DATA_ENCODING_IDX + sizeof "unknown data encoding") 220 N_("section `sh_size' too small for data") 221 "\0" 222 #define ELF_E_INVALID_ALIGN_IDX \ 223 (ELF_E_SECTION_TOO_SMALL_IDX + sizeof "section `sh_size' too small for data") 224 N_("invalid section alignment") 225 "\0" 226 #define ELF_E_INVALID_SHENTSIZE_IDX \ 227 (ELF_E_INVALID_ALIGN_IDX + sizeof "invalid section alignment") 228 N_("invalid section entry size") 229 "\0" 230 #define ELF_E_UPDATE_RO_IDX \ 231 (ELF_E_INVALID_SHENTSIZE_IDX + sizeof "invalid section entry size") 232 N_("update() for write on read-only file") 233 "\0" 234 #define ELF_E_NOFILE_IDX \ 235 (ELF_E_UPDATE_RO_IDX + sizeof "update() for write on read-only file") 236 N_("no such file") 237 "\0" 238 #define ELF_E_GROUP_NOT_REL_IDX \ 239 (ELF_E_NOFILE_IDX + sizeof "no such file") 240 N_("only relocatable files can contain section groups") 241 "\0" 242 #define ELF_E_INVALID_PHDR_IDX \ 243 (ELF_E_GROUP_NOT_REL_IDX \ 244 + sizeof "only relocatable files can contain section groups") 245 N_("program header only allowed in executables, shared objects, and \ 246 core files") 247 "\0" 248 #define ELF_E_NO_PHDR_IDX \ 249 (ELF_E_INVALID_PHDR_IDX \ 250 + sizeof "program header only allowed in executables, shared objects, and \ 251 core files") 252 N_("file has no program header") 253 "\0" 254 #define ELF_E_INVALID_OFFSET_IDX \ 255 (ELF_E_NO_PHDR_IDX \ 256 + sizeof "file has no program header") 257 N_("invalid offset") 258 }; 259 260 261 static const uint_fast16_t msgidx[ELF_E_NUM] = 262 { 263 [ELF_E_NOERROR] = ELF_E_NOERROR_IDX, 264 [ELF_E_UNKNOWN_ERROR] = ELF_E_UNKNOWN_ERROR_IDX, 265 [ELF_E_UNKNOWN_VERSION] = ELF_E_UNKNOWN_VERSION_IDX, 266 [ELF_E_UNKNOWN_TYPE] = ELF_E_UNKNOWN_TYPE_IDX, 267 [ELF_E_INVALID_HANDLE] = ELF_E_INVALID_HANDLE_IDX, 268 [ELF_E_SOURCE_SIZE] = ELF_E_SOURCE_SIZE_IDX, 269 [ELF_E_DEST_SIZE] = ELF_E_DEST_SIZE_IDX, 270 [ELF_E_INVALID_ENCODING] = ELF_E_INVALID_ENCODING_IDX, 271 [ELF_E_NOMEM] = ELF_E_NOMEM_IDX, 272 [ELF_E_INVALID_FILE] = ELF_E_INVALID_FILE_IDX, 273 [ELF_E_INVALID_OP] = ELF_E_INVALID_OP_IDX, 274 [ELF_E_NO_VERSION] = ELF_E_NO_VERSION_IDX, 275 [ELF_E_INVALID_CMD] = ELF_E_INVALID_CMD_IDX, 276 [ELF_E_RANGE] = ELF_E_RANGE_IDX, 277 [ELF_E_ARCHIVE_FMAG] = ELF_E_ARCHIVE_FMAG_IDX, 278 [ELF_E_INVALID_ARCHIVE] = ELF_E_INVALID_ARCHIVE_IDX, 279 [ELF_E_NO_ARCHIVE] = ELF_E_NO_ARCHIVE_IDX, 280 [ELF_E_NO_INDEX] = ELF_E_NO_INDEX_IDX, 281 [ELF_E_READ_ERROR] = ELF_E_READ_ERROR_IDX, 282 [ELF_E_WRITE_ERROR] = ELF_E_WRITE_ERROR_IDX, 283 [ELF_E_INVALID_CLASS] = ELF_E_INVALID_CLASS_IDX, 284 [ELF_E_INVALID_INDEX] = ELF_E_INVALID_INDEX_IDX, 285 [ELF_E_INVALID_OPERAND] = ELF_E_INVALID_OPERAND_IDX, 286 [ELF_E_INVALID_SECTION] = ELF_E_INVALID_SECTION_IDX, 287 [ELF_E_INVALID_COMMAND] = ELF_E_INVALID_COMMAND_IDX, 288 [ELF_E_WRONG_ORDER_EHDR] = ELF_E_WRONG_ORDER_EHDR_IDX, 289 [ELF_E_FD_DISABLED] = ELF_E_FD_DISABLED_IDX, 290 [ELF_E_FD_MISMATCH] = ELF_E_FD_MISMATCH_IDX, 291 [ELF_E_OFFSET_RANGE] = ELF_E_OFFSET_RANGE_IDX, 292 [ELF_E_NOT_NUL_SECTION] = ELF_E_NOT_NUL_SECTION_IDX, 293 [ELF_E_DATA_MISMATCH] = ELF_E_DATA_MISMATCH_IDX, 294 [ELF_E_INVALID_SECTION_HEADER] = ELF_E_INVALID_SECTION_HEADER_IDX, 295 [ELF_E_INVALID_DATA] = ELF_E_INVALID_DATA_IDX, 296 [ELF_E_DATA_ENCODING] = ELF_E_DATA_ENCODING_IDX, 297 [ELF_E_SECTION_TOO_SMALL] = ELF_E_SECTION_TOO_SMALL_IDX, 298 [ELF_E_INVALID_ALIGN] = ELF_E_INVALID_ALIGN_IDX, 299 [ELF_E_INVALID_SHENTSIZE] = ELF_E_INVALID_SHENTSIZE_IDX, 300 [ELF_E_UPDATE_RO] = ELF_E_UPDATE_RO_IDX, 301 [ELF_E_NOFILE] = ELF_E_NOFILE_IDX, 302 [ELF_E_GROUP_NOT_REL] = ELF_E_GROUP_NOT_REL_IDX, 303 [ELF_E_INVALID_PHDR] = ELF_E_INVALID_PHDR_IDX, 304 [ELF_E_NO_PHDR] = ELF_E_NO_PHDR_IDX, 305 [ELF_E_INVALID_OFFSET] = ELF_E_INVALID_OFFSET_IDX 306 }; 307 #define nmsgidx ((int) (sizeof (msgidx) / sizeof (msgidx[0]))) 308 309 310 void 311 __libelf_seterrno (value) 312 int value; 313 { 314 global_error = value >= 0 && value < nmsgidx ? value : ELF_E_UNKNOWN_ERROR; 315 } 316 317 318 const char * 319 elf_errmsg (error) 320 int error; 321 { 322 int last_error = global_error; 323 324 if (error == 0) 325 { 326 assert (msgidx[last_error] < sizeof (msgstr)); 327 return last_error != 0 ? _(msgstr + msgidx[last_error]) : NULL; 328 } 329 else if (error < -1 || error >= nmsgidx) 330 return _(msgstr + ELF_E_UNKNOWN_ERROR_IDX); 331 332 assert (msgidx[error == -1 ? last_error : error] < sizeof (msgstr)); 333 return _(msgstr + msgidx[error == -1 ? last_error : error]); 334 } 335
