FreeBSD/Linux Kernel Cross Reference
sys/kern/exec_conf.c
1 /* $OpenBSD: exec_conf.c,v 1.38 2021/12/07 22:17:02 guenther Exp $ */
2 /* $NetBSD: exec_conf.c,v 1.16 1995/12/09 05:34:47 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1993, 1994 Christopher G. Demetriou
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Christopher G. Demetriou.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/param.h>
35 #include <sys/exec.h>
36 #include <sys/exec_script.h>
37 #include <sys/exec_elf.h>
38
39 const struct execsw execsw[] = {
40 { /* shell scripts */
41 .es_hdrsz = EXEC_SCRIPT_HDRSZ,
42 .es_check = exec_script_makecmds,
43 },
44 { /* elf binaries */
45 .es_hdrsz = sizeof(Elf_Ehdr),
46 .es_check = exec_elf_makecmds,
47 },
48 };
49 int nexecs = (sizeof execsw / sizeof(*execsw));
50 int exec_maxhdrsz;
51
52 void init_exec(void);
53
54 void
55 init_exec(void)
56 {
57 int i;
58
59 /*
60 * figure out the maximum size of an exec header.
61 */
62 for (i = 0; i < nexecs; i++)
63 if (execsw[i].es_check != NULL &&
64 execsw[i].es_hdrsz > exec_maxhdrsz)
65 exec_maxhdrsz = execsw[i].es_hdrsz;
66 }
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