1/*	$NetBSD: linux_sig_notalpha.c,v 1.38 2008/04/28 20:23:44 martin Exp $	*/
2
3/*-
4 * Copyright (c) 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 Frank van der Linden and Eric Haszlakiewicz.
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/*
33 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
34 */
35
36#include <sys/cdefs.h>
37__KERNEL_RCSID(0, "$NetBSD: linux_sig_notalpha.c,v 1.38 2008/04/28 20:23:44 martin Exp $");
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/proc.h>
42#include <sys/filedesc.h>
43#include <sys/mount.h>
44#include <sys/kernel.h>
45#include <sys/signal.h>
46#include <sys/signalvar.h>
47
48#include <sys/syscallargs.h>
49
50#include <compat/linux/common/linux_types.h>
51#include <compat/linux/common/linux_signal.h>
52#include <compat/linux/common/linux_util.h>
53#include <compat/linux/common/linux_ipc.h>
54#include <compat/linux/common/linux_sem.h>
55
56#include <compat/linux/linux_syscallargs.h>
57
58/* Used on: arm, i386, m68k, mips, sparc, sparc64 */
59/* Not used on: alpha */
60
61#if !defined(__amd64__)
62/*
63 * The Linux signal() system call. I think that the signal() in the C
64 * library actually calls sigaction, so I doubt this one is ever used.
65 * But hey, it can't hurt having it here. The same restrictions as for
66 * sigaction() apply.
67 */
68int
69linux_sys_signal(struct lwp *l, const struct linux_sys_signal_args *uap, register_t *retval)
70{
71	/* {
72		syscallarg(int) signum;
73		syscallarg(linux_handler_t) handler;
74	} */
75	struct sigaction nbsa, obsa;
76	int error, sig;
77
78	*retval = -1;
79	sig = SCARG(uap, signum);
80	if (sig < 0 || sig >= LINUX__NSIG)
81		return (EINVAL);
82
83	nbsa.sa_handler = SCARG(uap, handler);
84	sigemptyset(&nbsa.sa_mask);
85	nbsa.sa_flags = SA_RESETHAND | SA_NODEFER;
86	error = sigaction1(l, linux_to_native_signo[sig],
87	    &nbsa, &obsa, NULL, 0);
88	if (error == 0)
89		*retval = (int)(long)obsa.sa_handler; /* XXXmanu cast */
90	return (error);
91}
92
93
94/* ARGSUSED */
95int
96linux_sys_siggetmask(struct lwp *l, const void *v, register_t *retval)
97{
98	struct proc *p = l->l_proc;
99	sigset_t bss;
100	linux_old_sigset_t lss;
101	int error;
102
103	mutex_enter(p->p_lock);
104	error = sigprocmask1(l, SIG_SETMASK, 0, &bss);
105	mutex_exit(p->p_lock);
106	if (error)
107		return (error);
108	native_to_linux_old_sigset(&lss, &bss);
109	*retval = lss;
110	return (0);
111}
112
113/*
114 * The following three functions fiddle with a process' signal mask.
115 * Convert the signal masks because of the different signal
116 * values for Linux. The need for this is the reason why
117 * they are here, and have not been mapped directly.
118 */
119int
120linux_sys_sigsetmask(struct lwp *l, const struct linux_sys_sigsetmask_args *uap, register_t *retval)
121{
122	/* {
123		syscallarg(linux_old_sigset_t) mask;
124	} */
125	sigset_t nbss, obss;
126	linux_old_sigset_t nlss, olss;
127	struct proc *p = l->l_proc;
128	int error;
129
130	nlss = SCARG(uap, mask);
131	linux_old_to_native_sigset(&nbss, &nlss);
132	mutex_enter(p->p_lock);
133	error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss);
134	mutex_exit(p->p_lock);
135	if (error)
136		return (error);
137	native_to_linux_old_sigset(&olss, &obss);
138	*retval = olss;
139	return (0);
140}
141
142int
143linux_sys_sigprocmask(struct lwp *l, const struct linux_sys_sigprocmask_args *uap, register_t *retval)
144{
145	/* {
146		syscallarg(int) how;
147		syscallarg(const linux_old_sigset_t *) set;
148		syscallarg(linux_old_sigset_t *) oset;
149	} */
150
151	return(linux_sigprocmask1(l, SCARG(uap, how),
152				SCARG(uap, set), SCARG(uap, oset)));
153}
154#endif /* !__amd64__ */
155
156/*
157 * The deprecated pause(2), which is really just an instance
158 * of sigsuspend(2).
159 */
160int
161linux_sys_pause(struct lwp *l, const void *v, register_t *retval)
162{
163
164	return (sigsuspend1(l, 0));
165}
166
167