kern_sig_13.c revision 1.19 
1/*	$NetBSD: kern_sig_13.c,v 1.19 2008/04/28 20:23:41 martin Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: kern_sig_13.c,v 1.19 2008/04/28 20:23:41 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/proc.h>
37#include <sys/signal.h>
38#include <sys/signalvar.h>
39#include <sys/systm.h>
40
41#include <sys/mount.h>
42#include <sys/syscallargs.h>
43
44#include <machine/limits.h>
45
46#include <compat/sys/signal.h>
47#include <compat/sys/signalvar.h>
48#include <compat/common/compat_util.h>
49#include <compat/common/compat_sigaltstack.h>
50
51void
52native_sigset13_to_sigset(const sigset13_t *oss, sigset_t *ss)
53{
54
55	ss->__bits[0] = *oss;
56	ss->__bits[1] = 0;
57	ss->__bits[2] = 0;
58	ss->__bits[3] = 0;
59}
60
61void
62native_sigset_to_sigset13(const sigset_t *ss, sigset13_t *oss)
63{
64
65	*oss = ss->__bits[0];
66}
67
68void
69native_sigaction13_to_sigaction(const struct sigaction13 *osa, struct sigaction *sa)
70{
71
72	sa->sa_handler = osa->osa_handler;
73	native_sigset13_to_sigset(&osa->osa_mask, &sa->sa_mask);
74	sa->sa_flags = osa->osa_flags;
75}
76
77void
78native_sigaction_to_sigaction13(const struct sigaction *sa, struct sigaction13 *osa)
79{
80
81	osa->osa_handler = sa->sa_handler;
82	native_sigset_to_sigset13(&sa->sa_mask, &osa->osa_mask);
83	osa->osa_flags = sa->sa_flags;
84}
85
86int
87compat_13_sys_sigaltstack(struct lwp *l, const struct compat_13_sys_sigaltstack_args *uap, register_t *retval)
88{
89	/* {
90		syscallarg(const struct sigaltstack13 *) nss;
91		syscallarg(struct sigaltstack13 *) oss;
92	} */
93	compat_sigaltstack(uap, sigaltstack13, SS_ONSTACK, SS_DISABLE);
94}
95
96int
97compat_13_sys_sigaction(struct lwp *l, const struct compat_13_sys_sigaction_args *uap, register_t *retval)
98{
99	/* {
100		syscallarg(int) signum;
101		syscallarg(const struct sigaction13 *) nsa;
102		syscallarg(struct sigaction13 *) osa;
103	} */
104	struct sigaction13 nesa, oesa;
105	struct sigaction nbsa, obsa;
106	int error;
107
108	if (SCARG(uap, nsa)) {
109		error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa));
110		if (error)
111			return (error);
112		native_sigaction13_to_sigaction(&nesa, &nbsa);
113	}
114	error = sigaction1(l, SCARG(uap, signum),
115	    SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0,
116	    NULL, 0);
117	if (error)
118		return (error);
119	if (SCARG(uap, osa)) {
120		native_sigaction_to_sigaction13(&obsa, &oesa);
121		error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa));
122		if (error)
123			return (error);
124	}
125	return (0);
126}
127
128int
129compat_13_sys_sigprocmask(struct lwp *l, const struct compat_13_sys_sigprocmask_args *uap, register_t *retval)
130{
131	/* {
132		syscallarg(int) how;
133		syscallarg(int) mask;
134	} */
135	struct proc *p = l->l_proc;
136	sigset13_t ness, oess;
137	sigset_t nbss, obss;
138	int error;
139
140	ness = SCARG(uap, mask);
141	native_sigset13_to_sigset(&ness, &nbss);
142	mutex_enter(p->p_lock);
143	error = sigprocmask1(l, SCARG(uap, how), &nbss, &obss);
144	mutex_exit(p->p_lock);
145	if (error)
146		return (error);
147	native_sigset_to_sigset13(&obss, &oess);
148	*retval = oess;
149	return (0);
150}
151
152int
153compat_13_sys_sigpending(struct lwp *l, const void *v, register_t *retval)
154{
155	sigset13_t ess;
156	sigset_t bss;
157
158	sigpending1(l, &bss);
159	native_sigset_to_sigset13(&bss, &ess);
160	*retval = ess;
161	return (0);
162}
163
164int
165compat_13_sys_sigsuspend(struct lwp *l, const struct compat_13_sys_sigsuspend_args *uap, register_t *retval)
166{
167	/* {
168		syscallarg(sigset13_t) mask;
169	} */
170	sigset13_t ess;
171	sigset_t bss;
172
173	ess = SCARG(uap, mask);
174	native_sigset13_to_sigset(&ess, &bss);
175	return (sigsuspend1(l, &bss));
176}
177