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 <ar.h> 31#include <assert.h> 32#include <libelf.h> 33 34#include "_libelf.h" 35 36char * 37elf_getident(Elf *e, size_t *sz) 38{ 39 40 if (e == NULL) { 41 LIBELF_SET_ERROR(ARGUMENT, 0); 42 goto error; 43 } 44 45 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) { 46 LIBELF_SET_ERROR(SEQUENCE, 0); 47 goto error; 48 } 49 50 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ); 51 52 if (sz) { 53 if (e->e_kind == ELF_K_AR) 54 *sz = SARMAG; 55 else if (e->e_kind == ELF_K_ELF) 56 *sz = EI_NIDENT; 57 else 58 *sz = e->e_rawsize; 59 } 60 61 return (e->e_rawfile); 62 63 error: 64 if (sz) 65 *sz = 0; 66 return (NULL); 67} 68