Branch data Line data Source code
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 : 368686 : 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 [ + - - + ]: 368686 : 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 [ + + ]: 368686 : if (ptr != NULL)
54 : 112 : *ptr = EI_NIDENT;
55 : :
56 : 368686 : return (char *) (elf->class == ELFCLASS32
57 : : || (offsetof (struct Elf, state.elf32.ehdr)
58 : : == offsetof (struct Elf, state.elf64.ehdr))
59 : 368686 : ? elf->state.elf32.ehdr->e_ident
60 : : : elf->state.elf64.ehdr->e_ident);
61 : : }
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