netbsd32_execve.c revision 1.27 
1/*	$NetBSD: netbsd32_execve.c,v 1.27 2007/02/09 21:55:22 ad Exp $	*/
2
3/*
4 * Copyright (c) 1998, 2001 Matthew R. Green
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 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * 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 <sys/cdefs.h>
32
33__KERNEL_RCSID(0, "$NetBSD: netbsd32_execve.c,v 1.27 2007/02/09 21:55:22 ad Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/mount.h>
38#include <sys/stat.h>
39#include <sys/vnode.h>
40#include <sys/file.h>
41#include <sys/filedesc.h>
42#include <sys/syscallargs.h>
43#include <sys/proc.h>
44#include <sys/exec.h>
45
46#include <compat/netbsd32/netbsd32.h>
47#include <compat/netbsd32/netbsd32_syscall.h>
48#include <compat/netbsd32/netbsd32_syscallargs.h>
49
50static int
51netbsd32_execve_fetch_element(char * const *array, size_t index, char **value)
52{
53	int error;
54	netbsd32_charp const *a32 = (void const *)array;
55	netbsd32_charp e;
56
57	error = copyin(a32 + index, &e, sizeof(e));
58	if (error)
59		return error;
60	*value = (char *)NETBSD32PTR64(e);
61	return 0;
62}
63
64int
65netbsd32_execve(struct lwp *l, void *v, register_t *retval)
66{
67	struct netbsd32_execve_args /* {
68		syscallarg(const netbsd32_charp) path;
69		syscallarg(netbsd32_charpp) argp;
70		syscallarg(netbsd32_charpp) envp;
71	} */ *uap = v;
72	caddr_t sg;
73	const char *path = NETBSD32PTR64(SCARG(uap, path));
74
75	sg = stackgap_init(l->l_proc, 0);
76	CHECK_ALT_EXIST(l, &sg, path);
77
78	return execve1(l, path, NETBSD32PTR64(SCARG(uap, argp)),
79	    NETBSD32PTR64(SCARG(uap, envp)), netbsd32_execve_fetch_element);
80}
81