elf_errmsg.c revision 260697
1/*- 2 * Copyright (c) 2006,2008,2011 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 29#include <libelf.h> 30#include <stdio.h> 31#include <string.h> 32 33#include "_libelf.h" 34 35ELFTC_VCSID("$Id: elf_errmsg.c 2225 2011-11-26 18:55:54Z jkoshy $"); 36 37/* 38 * Retrieve a human readable translation for an error message. 39 */ 40 41const char *_libelf_errors[] = { 42#define DEFINE_ERROR(N,S) [ELF_E_##N] = S 43 DEFINE_ERROR(NONE, "No Error"), 44 DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"), 45 DEFINE_ERROR(ARGUMENT, "Invalid argument"), 46 DEFINE_ERROR(CLASS, "ELF class mismatch"), 47 DEFINE_ERROR(DATA, "Invalid data buffer descriptor"), 48 DEFINE_ERROR(HEADER, "Missing or malformed ELF header"), 49 DEFINE_ERROR(IO, "I/O error"), 50 DEFINE_ERROR(LAYOUT, "Layout constraint violation"), 51 DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"), 52 DEFINE_ERROR(RANGE, "Value out of range of target"), 53 DEFINE_ERROR(RESOURCE, "Resource exhaustion"), 54 DEFINE_ERROR(SECTION, "Invalid section descriptor"), 55 DEFINE_ERROR(SEQUENCE, "API calls out of sequence"), 56 DEFINE_ERROR(UNIMPL, "Unimplemented feature"), 57 DEFINE_ERROR(VERSION, "Unknown ELF API version"), 58 DEFINE_ERROR(NUM, "Unknown error") 59#undef DEFINE_ERROR 60}; 61 62const char * 63elf_errmsg(int error) 64{ 65 int oserr; 66 67 if (error == ELF_E_NONE && 68 (error = LIBELF_PRIVATE(error)) == 0) 69 return NULL; 70 else if (error == -1) 71 error = LIBELF_PRIVATE(error); 72 73 oserr = error >> LIBELF_OS_ERROR_SHIFT; 74 error &= LIBELF_ELF_ERROR_MASK; 75 76 if (error < ELF_E_NONE || error >= ELF_E_NUM) 77 return _libelf_errors[ELF_E_NUM]; 78 if (oserr) { 79 (void) snprintf(LIBELF_PRIVATE(msg), 80 sizeof(LIBELF_PRIVATE(msg)), "%s: %s", 81 _libelf_errors[error], strerror(oserr)); 82 return (const char *)&LIBELF_PRIVATE(msg); 83 } 84 return _libelf_errors[error]; 85} 86