1 /* Retrieve file identification data. 2 Copyright (C) 1998, 1999, 2000, 2002, 2004 Red Hat, Inc. 3 This file is part of elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 1998. 5 6 This file is free software; you can redistribute it and/or modify 7 it under the terms of either 8 9 * the GNU Lesser General Public License as published by the Free 10 Software Foundation; either version 3 of the License, or (at 11 your option) any later version 12 13 or 14 15 * the GNU General Public License as published by the Free 16 Software Foundation; either version 2 of the License, or (at 17 your option) any later version 18 19 or both in parallel, as here. 20 21 elfutils is distributed in the hope that it will be useful, but 22 WITHOUT ANY WARRANTY; without even the implied warranty of 23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 General Public License for more details. 25 26 You should have received copies of the GNU General Public License and 27 the GNU Lesser General Public License along with this program. If 28 not, see <http://www.gnu.org/licenses/>. */ 29 30 #ifdef HAVE_CONFIG_H 31 # include <config.h> 32 #endif 33 34 #include <stddef.h> 35 36 #include "libelfP.h" 37 38 39 char * 40 elf_getident (elf, ptr) 41 Elf *elf; 42 size_t *ptr; 43 { 44 /* In case this is no ELF file, the handle is invalid and we return 45 NULL. */ 46 if (elf == NULL || elf->kind != ELF_K_ELF) 47 { 48 if (ptr != NULL) 49 *ptr = 0; 50 return NULL; 51 } 52 53 /* We already read the ELF header. Return a pointer to it and store 54 the length in *PTR. */ 55 if (ptr != NULL) 56 *ptr = EI_NIDENT; 57 58 return (char *) (elf->class == ELFCLASS32 59 || (offsetof (struct Elf, state.elf32.ehdr) 60 == offsetof (struct Elf, state.elf64.ehdr)) 61 ? elf->state.elf32.ehdr->e_ident 62 : elf->state.elf64.ehdr->e_ident); 63 } 64
