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
32ELFTC_VCSID("$Id$");
33
34/*
35 * A convenience helper that returns the ELF machine architecture for
36 * a ELF descriptor.
37 */
38int
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