1 /* $NetBSD: linux_sig_notalpha.c,v 1.39 2009/06/02 16:53:07 njoly 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 1.39 2009/06/02 16:53:07 njoly 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 */
68 int
linux_sys_signal(struct lwp * l,const struct linux_sys_signal_args * uap,register_t * retval)69 linux_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 */
95 int
linux_sys_siggetmask(struct lwp * l,const void * v,register_t * retval)96 linux_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 */
119 int
linux_sys_sigsetmask(struct lwp * l,const struct linux_sys_sigsetmask_args * uap,register_t * retval)120 linux_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
142 int
linux_sys_sigprocmask(struct lwp * l,const struct linux_sys_sigprocmask_args * uap,register_t * retval)143 linux_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 */
160 int
linux_sys_pause(struct lwp * l,const void * v,register_t * retval)161 linux_sys_pause(struct lwp *l, const void *v, register_t *retval)
162 {
163
164 return (sigsuspend1(l, 0));
165 }
166
167