kern_sig_13.c revision 1.1 
1/*	$NetBSD: kern_sig_13.c,v 1.1 1997/11/25 19:32:17 kleink Exp $	*/
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Klaus Klein.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <sys/types.h>
40#include <sys/param.h>
41#include <sys/proc.h>
42#include <sys/signal.h>
43#include <sys/systm.h>
44
45#include <sys/mount.h>
46#include <sys/syscallargs.h>
47
48#include <compat/common/compat_util.h>
49
50
51int
52compat_13_sys_sigaltstack(p, v, retval)
53	struct proc *p;
54	void *v;
55	register_t *retval;
56{
57	struct sys_sigaltstack_args ua;
58	struct compat_13_sys_sigaltstack_args /* {
59		syscallarg(const struct sigaltstack13 *) nss;
60		syscallarg(struct sigaltstack13 *) oss;
61	} */ *uap = v;
62	struct sigaltstack13 tmp13;
63	struct sigaltstack tmp, *nssp, *ossp;
64	caddr_t sg;
65	int error;
66
67	sg = stackgap_init(p->p_emul);
68
69
70	if (SCARG(uap, nss) != NULL) {
71		error = copyin(SCARG(uap, nss), &tmp13,
72		    sizeof(struct sigaltstack13));
73		if (error != 0)
74			return (error);
75
76		tmp.ss_sp = tmp13.ss_sp;
77		tmp.ss_size = tmp13.ss_size;
78		tmp.ss_flags = tmp13.ss_flags;
79
80		nssp = stackgap_alloc(&sg, sizeof(struct sigaltstack));
81		error = copyout(&tmp, nssp, sizeof(struct sigaltstack));
82		if (error != 0)
83			return (error);
84	} else
85		nssp = NULL;
86
87	if (SCARG(uap, oss) != NULL)
88		ossp = stackgap_alloc(&sg, sizeof(struct sigaltstack));
89	else
90		ossp = NULL;
91
92	SCARG(&ua, nss) = nssp;
93	SCARG(&ua, oss) = ossp;
94
95	error = sys_sigaltstack(p, &ua, retval);
96	if (error != 0)
97		return (error);
98
99	if (SCARG(uap, oss) != NULL) {
100		error = copyin(SCARG(&ua, oss), &tmp,
101		    sizeof(struct sigaltstack));
102		if (error != 0)
103			return (error);
104
105		tmp13.ss_sp = tmp.ss_sp;
106		tmp13.ss_size = (int)tmp.ss_size;
107		tmp13.ss_flags = tmp.ss_flags;
108
109		error = copyout(&tmp13, SCARG(uap, oss),
110		    sizeof(struct sigaltstack13));
111		if (error != 0)
112			return (error);
113	}
114
115	return (0);
116}
117