kern_sig_13.c revision 1.2 
1/*	$NetBSD: kern_sig_13.c,v 1.2 1997/11/29 18:39:46 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/param.h>
40#include <sys/proc.h>
41#include <sys/signal.h>
42#include <sys/systm.h>
43
44#include <sys/mount.h>
45#include <sys/syscallargs.h>
46
47#include <machine/limits.h>
48
49#include <compat/common/compat_util.h>
50
51
52int
53compat_13_sys_sigaltstack(p, v, retval)
54	struct proc *p;
55	void *v;
56	register_t *retval;
57{
58	struct sys___sigaltstack14_args ua;
59	struct compat_13_sys_sigaltstack_args /* {
60		syscallarg(const struct sigaltstack13 *) nss;
61		syscallarg(struct sigaltstack13 *) oss;
62	} */ *uap = v;
63	struct sigaltstack13 tmp13;
64	struct sigaltstack tmp, *nssp, *ossp;
65	caddr_t sg;
66	int error;
67
68	sg = stackgap_init(p->p_emul);
69
70
71	if (SCARG(uap, nss) != NULL) {
72		error = copyin(SCARG(uap, nss), &tmp13,
73		    sizeof(struct sigaltstack13));
74		if (error != 0)
75			return (error);
76
77		tmp.ss_sp = tmp13.ss_sp;
78		tmp.ss_size = tmp13.ss_size;
79		tmp.ss_flags = tmp13.ss_flags;
80
81		nssp = stackgap_alloc(&sg, sizeof(struct sigaltstack));
82		error = copyout(&tmp, nssp, sizeof(struct sigaltstack));
83		if (error != 0)
84			return (error);
85	} else
86		nssp = NULL;
87
88	if (SCARG(uap, oss) != NULL)
89		ossp = stackgap_alloc(&sg, sizeof(struct sigaltstack));
90	else
91		ossp = NULL;
92
93	SCARG(&ua, nss) = nssp;
94	SCARG(&ua, oss) = ossp;
95
96	error = sys___sigaltstack14(p, &ua, retval);
97	if (error != 0)
98		return (error);
99
100	if (SCARG(uap, oss) != NULL) {
101		error = copyin(SCARG(&ua, oss), &tmp,
102		    sizeof(struct sigaltstack));
103		if (error != 0)
104			return (error);
105
106		tmp13.ss_sp = tmp.ss_sp;
107		if (tmp.ss_size > INT_MAX)
108			tmp13.ss_size = INT_MAX;
109		else
110			tmp13.ss_size = tmp.ss_size;
111		tmp13.ss_flags = tmp.ss_flags;
112
113		error = copyout(&tmp13, SCARG(uap, oss),
114		    sizeof(struct sigaltstack13));
115		if (error != 0)
116			return (error);
117	}
118
119	return (0);
120}
121