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1 : : /* Retrieve file identification data. 2 : : Copyright (C) 1998, 1999, 2000, 2002, 2004, 2015 Red Hat, Inc. 3 : : This file is part of elfutils. 4 : : Written by Ulrich Drepper <drepper@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 : 368246 : elf_getident (Elf *elf, size_t *ptr) 41 : : { 42 : : /* In case this is no ELF file, the handle is invalid and we return 43 : : NULL. */ 44 [ + - - + ]: 368246 : if (elf == NULL || elf->kind != ELF_K_ELF) 45 : : { 46 [ # # ]: 0 : if (ptr != NULL) 47 : 0 : *ptr = 0; 48 : 0 : return NULL; 49 : : } 50 : : 51 : : /* We already read the ELF header. Return a pointer to it and store 52 : : the length in *PTR. */ 53 [ + + ]: 368246 : if (ptr != NULL) 54 : 54 : *ptr = EI_NIDENT; 55 : : 56 : 368246 : return (char *) (elf->class == ELFCLASS32 57 : : || (offsetof (struct Elf, state.elf32.ehdr) 58 : : == offsetof (struct Elf, state.elf64.ehdr)) 59 : 368246 : ? elf->state.elf32.ehdr->e_ident 60 : : : elf->state.elf64.ehdr->e_ident); 61 : : }