1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2020 The FreeBSD Foundation
5 *
6 * This software was developed by Tiger Gao under sponsorship from
7 * the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are
11 * met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in
16 *    the documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <assert.h>
32#include <gelf.h>
33#include <libelf.h>
34#include <limits.h>
35#include <stdint.h>
36
37#include "_libelf.h"
38
39Elf32_Chdr *
40elf32_getchdr(Elf_Scn *s)
41{
42	return (_libelf_getchdr(s, ELFCLASS32));
43}
44
45Elf64_Chdr *
46elf64_getchdr(Elf_Scn *s)
47{
48	return (_libelf_getchdr(s, ELFCLASS64));
49}
50
51GElf_Chdr *
52gelf_getchdr(Elf_Scn *s, GElf_Chdr *d)
53{
54	int ec;
55	void *ch;
56	Elf32_Chdr *ch32;
57	Elf64_Chdr *ch64;
58
59	if (d == NULL) {
60		LIBELF_SET_ERROR(ARGUMENT, 0);
61		return (NULL);
62	}
63
64	if ((ch = _libelf_getchdr(s, ELFCLASSNONE)) == NULL)
65		return (NULL);
66
67	ec = s->s_elf->e_class;
68	assert(ec == ELFCLASS32 || ec == ELFCLASS64);
69
70	if (ec == ELFCLASS32) {
71		ch32 = (Elf32_Chdr *)ch;
72
73		d->ch_type = (Elf64_Word)ch32->ch_type;
74		d->ch_size = (Elf64_Xword)ch32->ch_size;
75		d->ch_addralign = (Elf64_Xword)ch32->ch_addralign;
76	} else {
77		ch64 = (Elf64_Chdr *)ch;
78		*d = *ch64;
79	}
80
81	return (d);
82}
83