1 /* $NetBSD: elf_getident.c,v 1.3 2016/02/20 02:43:42 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2006,2008 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 #if HAVE_NBTOOL_CONFIG_H 30 # include "nbtool_config.h" 31 #endif 32 33 #include <sys/cdefs.h> 34 35 #include <ar.h> 36 #include <assert.h> 37 #include <libelf.h> 38 39 #include "_libelf.h" 40 41 __RCSID("$NetBSD: elf_getident.c,v 1.3 2016/02/20 02:43:42 christos Exp $"); 42 ELFTC_VCSID("Id: elf_getident.c 3174 2015-03-27 17:13:41Z emaste "); 43 44 char * 45 elf_getident(Elf *e, size_t *sz) 46 { 47 48 if (e == NULL) { 49 LIBELF_SET_ERROR(ARGUMENT, 0); 50 goto error; 51 } 52 53 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) { 54 LIBELF_SET_ERROR(SEQUENCE, 0); 55 goto error; 56 } 57 58 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ); 59 60 if (sz) { 61 if (e->e_kind == ELF_K_AR) 62 *sz = SARMAG; 63 else if (e->e_kind == ELF_K_ELF) 64 *sz = EI_NIDENT; 65 else 66 *sz = e->e_rawsize; 67 } 68 69 return ((char *) e->e_rawfile); 70 71 error: 72 if (sz) 73 *sz = 0; 74 return (NULL); 75 } 76