1 /*-
2 * Copyright (c) 2018 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 <assert.h>
28 #include <libelf.h>
29
30 #include "_libelf.h"
31
32 ELFTC_VCSID("$Id$");
33
34 /*
35 * A convenience helper that returns the ELF machine architecture for
36 * a ELF descriptor.
37 */
38 int
_libelf_elfmachine(Elf * e)39 _libelf_elfmachine(Elf *e)
40 {
41 Elf32_Ehdr *eh32;
42 Elf64_Ehdr *eh64;
43
44 if (!e)
45 return EM_NONE;
46
47 assert(e->e_kind == ELF_K_ELF);
48 assert(e->e_class != ELFCLASSNONE);
49
50 eh32 = NULL;
51 eh64 = NULL;
52
53 switch (e->e_class) {
54 case ELFCLASS32:
55 eh32 = e->e_u.e_elf.e_ehdr.e_ehdr32;
56 return eh32 ? eh32->e_machine : EM_NONE;
57 case ELFCLASS64:
58 eh64 = e->e_u.e_elf.e_ehdr.e_ehdr64;
59 return eh64 ? eh64->e_machine : EM_NONE;
60 }
61
62 return (EM_NONE);
63 }
64