linux_exec.c revision 1.34 
1/*	$NetBSD: linux_exec.c,v 1.34 1998/10/07 22:17:57 erh Exp $	*/
2
3/*-
4 * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas, Frank van der Linden, Eric Haszlakiewicz and
9 * Thor Lancelot Simon.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *        This product includes software developed by the NetBSD
22 *        Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/proc.h>
44#include <sys/malloc.h>
45#include <sys/namei.h>
46#include <sys/vnode.h>
47#include <sys/mount.h>
48#include <sys/exec.h>
49#include <sys/exec_elf.h>
50
51#include <sys/mman.h>
52#include <sys/syscallargs.h>
53
54#include <vm/vm.h>
55#include <vm/vm_param.h>
56#include <vm/vm_map.h>
57
58#include <machine/cpu.h>
59#include <machine/reg.h>
60
61#include <compat/linux/common/linux_types.h>
62#include <compat/linux/common/linux_signal.h>
63#include <compat/linux/common/linux_util.h>
64#include <compat/linux/common/linux_exec.h>
65#include <compat/linux/common/linux_machdep.h>
66
67#include <compat/linux/linux_syscallargs.h>
68#include <compat/linux/linux_syscall.h>
69
70
71const char linux_emul_path[] = "/emul/linux";
72
73/*
74 * Execve(2). Just check the alternate emulation path, and pass it on
75 * to the NetBSD execve().
76 */
77int
78linux_sys_execve(p, v, retval)
79	struct proc *p;
80	void *v;
81	register_t *retval;
82{
83	struct linux_sys_execve_args /* {
84		syscallarg(char *) path;
85		syscallarg(char **) argv;
86		syscallarg(char **) envp;
87	} */ *uap = v;
88	struct sys_execve_args ap;
89	caddr_t sg;
90
91	sg = stackgap_init(p->p_emul);
92	LINUX_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
93
94	SCARG(&ap, path) = SCARG(uap, path);
95	SCARG(&ap, argp) = SCARG(uap, argp);
96	SCARG(&ap, envp) = SCARG(uap, envp);
97
98	return sys_execve(p, &ap, retval);
99}
100