kern_sig_13.c revision 1.20 
1/*	$NetBSD: kern_sig_13.c,v 1.20 2011/01/19 10:21:16 tsutsui 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 1.20 2011/01/19 10:21:16 tsutsui 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/syscallargs.h>
42
43#include <machine/limits.h>
44
45#include <compat/sys/signal.h>
46#include <compat/sys/signalvar.h>
47#include <compat/common/compat_util.h>
48#include <compat/common/compat_sigaltstack.h>
49
50void
51native_sigset13_to_sigset(const sigset13_t *oss, sigset_t *ss)
52{
53
54	ss->__bits[0] = *oss;
55	ss->__bits[1] = 0;
56	ss->__bits[2] = 0;
57	ss->__bits[3] = 0;
58}
59
60void
61native_sigset_to_sigset13(const sigset_t *ss, sigset13_t *oss)
62{
63
64	*oss = ss->__bits[0];
65}
66
67void
68native_sigaction13_to_sigaction(const struct sigaction13 *osa, struct sigaction *sa)
69{
70
71	sa->sa_handler = osa->osa_handler;
72	native_sigset13_to_sigset(&osa->osa_mask, &sa->sa_mask);
73	sa->sa_flags = osa->osa_flags;
74}
75
76void
77native_sigaction_to_sigaction13(const struct sigaction *sa, struct sigaction13 *osa)
78{
79
80	osa->osa_handler = sa->sa_handler;
81	native_sigset_to_sigset13(&sa->sa_mask, &osa->osa_mask);
82	osa->osa_flags = sa->sa_flags;
83}
84
85int
86compat_13_sys_sigaltstack(struct lwp *l, const struct compat_13_sys_sigaltstack_args *uap, register_t *retval)
87{
88	/* {
89		syscallarg(const struct sigaltstack13 *) nss;
90		syscallarg(struct sigaltstack13 *) oss;
91	} */
92	compat_sigaltstack(uap, sigaltstack13, SS_ONSTACK, SS_DISABLE);
93}
94
95int
96compat_13_sys_sigaction(struct lwp *l, const struct compat_13_sys_sigaction_args *uap, register_t *retval)
97{
98	/* {
99		syscallarg(int) signum;
100		syscallarg(const struct sigaction13 *) nsa;
101		syscallarg(struct sigaction13 *) osa;
102	} */
103	struct sigaction13 nesa, oesa;
104	struct sigaction nbsa, obsa;
105	int error;
106
107	if (SCARG(uap, nsa)) {
108		error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa));
109		if (error)
110			return (error);
111		native_sigaction13_to_sigaction(&nesa, &nbsa);
112	}
113	error = sigaction1(l, SCARG(uap, signum),
114	    SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0,
115	    NULL, 0);
116	if (error)
117		return (error);
118	if (SCARG(uap, osa)) {
119		native_sigaction_to_sigaction13(&obsa, &oesa);
120		error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa));
121		if (error)
122			return (error);
123	}
124	return (0);
125}
126
127int
128compat_13_sys_sigprocmask(struct lwp *l, const struct compat_13_sys_sigprocmask_args *uap, register_t *retval)
129{
130	/* {
131		syscallarg(int) how;
132		syscallarg(int) mask;
133	} */
134	struct proc *p = l->l_proc;
135	sigset13_t ness, oess;
136	sigset_t nbss, obss;
137	int error;
138
139	ness = SCARG(uap, mask);
140	native_sigset13_to_sigset(&ness, &nbss);
141	mutex_enter(p->p_lock);
142	error = sigprocmask1(l, SCARG(uap, how), &nbss, &obss);
143	mutex_exit(p->p_lock);
144	if (error)
145		return (error);
146	native_sigset_to_sigset13(&obss, &oess);
147	*retval = oess;
148	return (0);
149}
150
151int
152compat_13_sys_sigpending(struct lwp *l, const void *v, register_t *retval)
153{
154	sigset13_t ess;
155	sigset_t bss;
156
157	sigpending1(l, &bss);
158	native_sigset_to_sigset13(&bss, &ess);
159	*retval = ess;
160	return (0);
161}
162
163int
164compat_13_sys_sigsuspend(struct lwp *l, const struct compat_13_sys_sigsuspend_args *uap, register_t *retval)
165{
166	/* {
167		syscallarg(sigset13_t) mask;
168	} */
169	sigset13_t ess;
170	sigset_t bss;
171
172	ess = SCARG(uap, mask);
173	native_sigset13_to_sigset(&ess, &bss);
174	return (sigsuspend1(l, &bss));
175}
176