1 /*-
2 * Copyright (c) 2006 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 <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <ar.h>
31 #include <assert.h>
32 #include <libelf.h>
33
34 #include "_libelf.h"
35
36 char *
elf_getident(Elf * e,size_t * sz)37 elf_getident(Elf *e, size_t *sz)
38 {
39
40 if (e == NULL) {
41 LIBELF_SET_ERROR(ARGUMENT, 0);
42 goto error;
43 }
44
45 if (e->e_cmd == ELF_C_WRITE && e->e_rawfile == NULL) {
46 LIBELF_SET_ERROR(SEQUENCE, 0);
47 goto error;
48 }
49
50 assert(e->e_kind != ELF_K_AR || e->e_cmd == ELF_C_READ);
51
52 if (sz) {
53 if (e->e_kind == ELF_K_AR)
54 *sz = SARMAG;
55 else if (e->e_kind == ELF_K_ELF)
56 *sz = EI_NIDENT;
57 else
58 *sz = e->e_rawsize;
59 }
60
61 return (e->e_rawfile);
62
63 error:
64 if (sz)
65 *sz = 0;
66 return (NULL);
67 }
68