1 /* $NetBSD: elf_getident.c,v 1.5 2024/03/03 17:37:33 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2006,2008 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 #include <sys/cdefs.h>
33
34 #include <ar.h>
35 #include <assert.h>
36 #include <libelf.h>
37
38 #include "_libelf.h"
39
40 __RCSID("$NetBSD: elf_getident.c,v 1.5 2024/03/03 17:37:33 christos Exp $");
41
42 char *
elf_getident(Elf * e,size_t * sz)43 elf_getident(Elf *e, size_t *sz)
44 {
45
46 if (e == NULL) {
47 LIBELF_SET_ERROR(ARGUMENT, 0);
48 goto error;
49 }
50
51 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) {
52 LIBELF_SET_ERROR(SEQUENCE, 0);
53 goto error;
54 }
55
56 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ);
57
58 if (sz) {
59 if (e->e_kind == ELF_K_AR)
60 *sz = SARMAG;
61 else if (e->e_kind == ELF_K_ELF)
62 *sz = EI_NIDENT;
63 else
64 *sz = (size_t) e->e_rawsize;
65 }
66
67 return ((char *) e->e_rawfile);
68
69 error:
70 if (sz)
71 *sz = 0;
72 return (NULL);
73 }
74