1 /* $NetBSD: elf_errmsg.c,v 1.3 2016/02/20 02:43:42 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2006,2008,2011 Joseph Koshy 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <libelf.h> 30 #include <stdio.h> 31 #include <string.h> 32 33 #include "_libelf.h" 34 35 __RCSID("$NetBSD: elf_errmsg.c,v 1.3 2016/02/20 02:43:42 christos Exp $"); 36 ELFTC_VCSID("Id: elf_errmsg.c 3174 2015-03-27 17:13:41Z emaste "); 37 38 /* 39 * Retrieve a human readable translation for an error message. 40 */ 41 42 static const char *_libelf_errors[] = { 43 #define DEFINE_ERROR(N,S) [ELF_E_##N] = S 44 DEFINE_ERROR(NONE, "No Error"), 45 DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"), 46 DEFINE_ERROR(ARGUMENT, "Invalid argument"), 47 DEFINE_ERROR(CLASS, "ELF class mismatch"), 48 DEFINE_ERROR(DATA, "Invalid data buffer descriptor"), 49 DEFINE_ERROR(HEADER, "Missing or malformed ELF header"), 50 DEFINE_ERROR(IO, "I/O error"), 51 DEFINE_ERROR(LAYOUT, "Layout constraint violation"), 52 DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"), 53 DEFINE_ERROR(RANGE, "Value out of range of target"), 54 DEFINE_ERROR(RESOURCE, "Resource exhaustion"), 55 DEFINE_ERROR(SECTION, "Invalid section descriptor"), 56 DEFINE_ERROR(SEQUENCE, "API calls out of sequence"), 57 DEFINE_ERROR(UNIMPL, "Unimplemented feature"), 58 DEFINE_ERROR(VERSION, "Unknown ELF API version"), 59 DEFINE_ERROR(NUM, "Unknown error") 60 #undef DEFINE_ERROR 61 }; 62 63 const char * 64 elf_errmsg(int error) 65 { 66 int oserr; 67 68 if (error == ELF_E_NONE && 69 (error = LIBELF_PRIVATE(error)) == 0) 70 return NULL; 71 else if (error == -1) 72 error = LIBELF_PRIVATE(error); 73 74 oserr = error >> LIBELF_OS_ERROR_SHIFT; 75 error &= LIBELF_ELF_ERROR_MASK; 76 77 if (error < ELF_E_NONE || error >= ELF_E_NUM) 78 return _libelf_errors[ELF_E_NUM]; 79 if (oserr) { 80 (void) snprintf((char *) LIBELF_PRIVATE(msg), 81 sizeof(LIBELF_PRIVATE(msg)), "%s: %s", 82 _libelf_errors[error], strerror(oserr)); 83 return (const char *)&LIBELF_PRIVATE(msg); 84 } 85 return _libelf_errors[error]; 86 } 87