netbsd32_execve.c revision 1.25 
1/*	$NetBSD: netbsd32_execve.c,v 1.25 2005/12/11 12:20:22 christos 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#if defined(_KERNEL_OPT)
34#include "opt_ktrace.h"
35#endif
36
37__KERNEL_RCSID(0, "$NetBSD: netbsd32_execve.c,v 1.25 2005/12/11 12:20:22 christos Exp $");
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/mount.h>
42#include <sys/stat.h>
43#include <sys/vnode.h>
44#include <sys/file.h>
45#include <sys/filedesc.h>
46#include <sys/sa.h>
47#include <sys/syscallargs.h>
48#include <sys/proc.h>
49#include <sys/exec.h>
50
51#include <compat/netbsd32/netbsd32.h>
52#include <compat/netbsd32/netbsd32_syscall.h>
53#include <compat/netbsd32/netbsd32_syscallargs.h>
54
55static int
56netbsd32_execve_fetch_element(char * const *array, size_t index, char **value)
57{
58	int error;
59	netbsd32_charp const *a32 = (void const *)array;
60	netbsd32_charp e;
61
62	error = copyin(a32 + index, &e, sizeof(e));
63	if (error)
64		return error;
65	*value = (char *)NETBSD32PTR64(e);
66	return 0;
67}
68
69int
70netbsd32_execve(struct lwp *l, void *v, register_t *retval)
71{
72	struct netbsd32_execve_args /* {
73		syscallarg(const netbsd32_charp) path;
74		syscallarg(netbsd32_charpp) argp;
75		syscallarg(netbsd32_charpp) envp;
76	} */ *uap = v;
77	caddr_t sg;
78	const char *path = NETBSD32PTR64(SCARG(uap, path));
79
80	sg = stackgap_init(l->l_proc, 0);
81	CHECK_ALT_EXIST(l, &sg, path);
82
83	return execve1(l, path, NETBSD32PTR64(SCARG(uap, argp)),
84	    NETBSD32PTR64(SCARG(uap, envp)), netbsd32_execve_fetch_element);
85}
86