1/*- 2 * Copyright (c) 2006 Joseph Koshy 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <libelf.h> 31#include <string.h> 32 33#include "_libelf.h" 34 35/* 36 * Retrieve a human readable translation for an error message. 37 */ 38 39static const char *_libelf_errors[] = { 40#define DEFINE_ERROR(N,S) [ELF_E_##N] = S 41 DEFINE_ERROR(NONE, "No Error"), 42 DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"), 43 DEFINE_ERROR(ARGUMENT, "Invalid argument"), 44 DEFINE_ERROR(CLASS, "ELF class mismatch"), 45 DEFINE_ERROR(DATA, "Invalid data buffer descriptor"), 46 DEFINE_ERROR(HEADER, "Missing or malformed ELF header"), 47 DEFINE_ERROR(IO, "I/O error"), 48 DEFINE_ERROR(LAYOUT, "Layout constraint violation"), 49 DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"), 50 DEFINE_ERROR(RANGE, "Value out of range of target"), 51 DEFINE_ERROR(RESOURCE, "Resource exhaustion"), 52 DEFINE_ERROR(SECTION, "Invalid section descriptor"), 53 DEFINE_ERROR(SEQUENCE, "API calls out of sequence"), 54 DEFINE_ERROR(UNIMPL, "Unimplemented feature"), 55 DEFINE_ERROR(VERSION, "Unknown ELF API version"), 56 DEFINE_ERROR(NUM, "Unknown error") 57#undef DEFINE_ERROR 58}; 59 60const char * 61elf_errmsg(int error) 62{ 63 int oserr; 64 65 if (error == 0 && (error = LIBELF_PRIVATE(error)) == 0) 66 return NULL; 67 else if (error == -1) 68 error = LIBELF_PRIVATE(error); 69 70 oserr = error >> LIBELF_OS_ERROR_SHIFT; 71 error &= LIBELF_ELF_ERROR_MASK; 72 73 if (error < 0 || error >= ELF_E_NUM) 74 return _libelf_errors[ELF_E_NUM]; 75 if (oserr) { 76 strlcpy(LIBELF_PRIVATE(msg), _libelf_errors[error], 77 sizeof(LIBELF_PRIVATE(msg))); 78 strlcat(LIBELF_PRIVATE(msg), ": ", sizeof(LIBELF_PRIVATE(msg))); 79 strlcat(LIBELF_PRIVATE(msg), strerror(oserr), 80 sizeof(LIBELF_PRIVATE(msg))); 81 return (const char *)&LIBELF_PRIVATE(msg); 82 } 83 return _libelf_errors[error]; 84} 85 86#if defined(LIBELF_TEST_HOOKS) 87 88const char * 89_libelf_get_unknown_error_message(void) 90{ 91 return _libelf_errors[ELF_E_NUM]; 92} 93 94const char * 95_libelf_get_no_error_message(void) 96{ 97 return _libelf_errors[0]; 98} 99 100#endif /* LIBELF_TEST_HOOKS */ 101