1 /* $NetBSD: libelf_elfmachine.c,v 1.2 2024/03/03 17:37:34 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2018 Joseph Koshy
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #if HAVE_NBTOOL_CONFIG_H
30 # include "nbtool_config.h"
31 #endif
32
33 #include <sys/cdefs.h>
34
35 #include <assert.h>
36 #include <libelf.h>
37
38 #include "_libelf.h"
39
40 __RCSID("$NetBSD: libelf_elfmachine.c,v 1.2 2024/03/03 17:37:34 christos Exp $");
41 ELFTC_VCSID("Id: libelf_elfmachine.c 3977 2022-05-01 06:45:34Z jkoshy");
42
43 /*
44 * A convenience helper that returns the ELF machine architecture for
45 * a ELF descriptor.
46 */
47 int
_libelf_elfmachine(Elf * e)48 _libelf_elfmachine(Elf *e)
49 {
50 Elf32_Ehdr *eh32;
51 Elf64_Ehdr *eh64;
52
53 if (!e)
54 return EM_NONE;
55
56 assert(e->e_kind == ELF_K_ELF);
57 assert(e->e_class != ELFCLASSNONE);
58
59 eh32 = NULL;
60 eh64 = NULL;
61
62 switch (e->e_class) {
63 case ELFCLASS32:
64 eh32 = e->e_u.e_elf.e_ehdr.e_ehdr32;
65 return eh32 ? eh32->e_machine : EM_NONE;
66 case ELFCLASS64:
67 eh64 = e->e_u.e_elf.e_ehdr.e_ehdr64;
68 return eh64 ? eh64->e_machine : EM_NONE;
69 }
70
71 return (EM_NONE);
72 }
73