elf_errmsg.c revision 241720
1240868Spjd/*- 2240868Spjd * Copyright (c) 2006 Joseph Koshy 3240868Spjd * All rights reserved. 4240868Spjd * 5240868Spjd * Redistribution and use in source and binary forms, with or without 6240868Spjd * modification, are permitted provided that the following conditions 7240868Spjd * are met: 8240868Spjd * 1. Redistributions of source code must retain the above copyright 9240868Spjd * notice, this list of conditions and the following disclaimer. 10240868Spjd * 2. Redistributions in binary form must reproduce the above copyright 11240868Spjd * notice, this list of conditions and the following disclaimer in the 12240868Spjd * documentation and/or other materials provided with the distribution. 13240868Spjd * 14240868Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15240868Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16240868Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17240868Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18240868Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19240868Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20240868Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21240868Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22240868Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23240868Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24240868Spjd * SUCH DAMAGE. 25240868Spjd */ 26240868Spjd 27240868Spjd#include <sys/cdefs.h> 28240868Spjd__FBSDID("$FreeBSD: head/lib/libelf/elf_errmsg.c 241720 2012-10-19 05:43:38Z ed $"); 29240868Spjd 30240868Spjd#include <libelf.h> 31244187Ssmh#include <string.h> 32244187Ssmh 33244187Ssmh#include "_libelf.h" 34244187Ssmh 35244187Ssmh/* 36244187Ssmh * Retrieve a human readable translation for an error message. 37244187Ssmh */ 38244187Ssmh 39248572Ssmhstatic const char *_libelf_errors[] = { 40248572Ssmh#define DEFINE_ERROR(N,S) [ELF_E_##N] = S 41244187Ssmh DEFINE_ERROR(NONE, "No Error"), 42240868Spjd DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"), 43240868Spjd DEFINE_ERROR(ARGUMENT, "Invalid argument"), 44240868Spjd DEFINE_ERROR(CLASS, "ELF class mismatch"), 45240868Spjd DEFINE_ERROR(DATA, "Invalid data buffer descriptor"), 46240868Spjd DEFINE_ERROR(HEADER, "Missing or malformed ELF header"), 47240868Spjd DEFINE_ERROR(IO, "I/O error"), 48240868Spjd DEFINE_ERROR(LAYOUT, "Layout constraint violation"), 49240868Spjd DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"), 50240868Spjd DEFINE_ERROR(RANGE, "Value out of range of target"), 51240868Spjd DEFINE_ERROR(RESOURCE, "Resource exhaustion"), 52240868Spjd DEFINE_ERROR(SECTION, "Invalid section descriptor"), 53240868Spjd DEFINE_ERROR(SEQUENCE, "API calls out of sequence"), 54240868Spjd DEFINE_ERROR(UNIMPL, "Unimplemented feature"), 55240868Spjd DEFINE_ERROR(VERSION, "Unknown ELF API version"), 56240868Spjd DEFINE_ERROR(NUM, "Unknown error") 57240868Spjd#undef DEFINE_ERROR 58240868Spjd}; 59240868Spjd 60240868Spjdconst char * 61240868Spjdelf_errmsg(int error) 62240868Spjd{ 63240868Spjd int oserr; 64240868Spjd 65240868Spjd if (error == 0 && (error = LIBELF_PRIVATE(error)) == 0) 66240868Spjd return NULL; 67240868Spjd else if (error == -1) 68240868Spjd error = LIBELF_PRIVATE(error); 69240868Spjd 70240868Spjd oserr = error >> LIBELF_OS_ERROR_SHIFT; 71240868Spjd error &= LIBELF_ELF_ERROR_MASK; 72240868Spjd 73240868Spjd if (error < 0 || error >= ELF_E_NUM) 74240868Spjd return _libelf_errors[ELF_E_NUM]; 75240868Spjd if (oserr) { 76240868Spjd strlcpy(LIBELF_PRIVATE(msg), _libelf_errors[error], 77240868Spjd sizeof(LIBELF_PRIVATE(msg))); 78240868Spjd strlcat(LIBELF_PRIVATE(msg), ": ", sizeof(LIBELF_PRIVATE(msg))); 79240868Spjd strlcat(LIBELF_PRIVATE(msg), strerror(oserr), 80240868Spjd sizeof(LIBELF_PRIVATE(msg))); 81240868Spjd return (const char *)&LIBELF_PRIVATE(msg); 82240868Spjd } 83240868Spjd return _libelf_errors[error]; 84240868Spjd} 85240868Spjd 86240868Spjd#if defined(LIBELF_TEST_HOOKS) 87240868Spjd 88240868Spjdconst char * 89240868Spjd_libelf_get_unknown_error_message(void) 90240868Spjd{ 91240868Spjd return _libelf_errors[ELF_E_NUM]; 92240868Spjd} 93240868Spjd 94240868Spjdconst char * 95240868Spjd_libelf_get_no_error_message(void) 96240868Spjd{ 97240868Spjd return _libelf_errors[0]; 98240868Spjd} 99240868Spjd 100240868Spjd#endif /* LIBELF_TEST_HOOKS */ 101240868Spjd