1 /* $NetBSD: linux_sigaction.c,v 1.25 2003/01/18 21:21:32 thorpej 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 * 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 /*
40 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
41 */
42
43 #include <sys/cdefs.h>
44 __KERNEL_RCSID(0, "$NetBSD: linux_sigaction.c,v 1.25 2003/01/18 21:21:32 thorpej Exp $");
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/proc.h>
49 #include <sys/filedesc.h>
50 #include <sys/mount.h>
51 #include <sys/kernel.h>
52 #include <sys/signal.h>
53 #include <sys/signalvar.h>
54
55 #include <sys/sa.h>
56 #include <sys/syscallargs.h>
57
58 #include <compat/linux/common/linux_types.h>
59 #include <compat/linux/common/linux_signal.h>
60 #include <compat/linux/common/linux_util.h>
61
62 #include <compat/linux/linux_syscallargs.h>
63
64 /* Used on: alpha (aka osf_sigaction), arm, i386, m68k, mips, ppc */
65 /* Not used on: sparc, sparc64 */
66
67 /*
68 * The Linux sigaction() system call. Do the usual conversions,
69 * and just call sigaction().
70 */
71 int
72 linux_sys_sigaction(l, v, retval)
73 struct lwp *l;
74 void *v;
75 register_t *retval;
76 {
77 struct linux_sys_sigaction_args /* {
78 syscallarg(int) signum;
79 syscallarg(const struct linux_old_sigaction *) nsa;
80 syscallarg(struct linux_old_sigaction *) osa;
81 } */ *uap = v;
82 struct proc *p = l->l_proc;
83 struct linux_old_sigaction nlsa, olsa;
84 struct sigaction nbsa, obsa;
85 int error, sig;
86
87 /* XXX XAX handle switch to RT signal handler */
88 /* XXX XAX and update emuldata->ps_siginfo. */
89
90 if (SCARG(uap, nsa)) {
91 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa));
92 if (error)
93 return (error);
94 linux_old_to_native_sigaction(&nbsa, &nlsa);
95 }
96 sig = SCARG(uap, signum);
97 if (sig < 0 || sig >= LINUX__NSIG)
98 return (EINVAL);
99 if (sig > 0 && !linux_to_native_signo[sig]) {
100 /* Pretend that we did something useful for unknown signals. */
101 obsa.sa_handler = SIG_IGN;
102 sigemptyset(&obsa.sa_mask);
103 obsa.sa_flags = 0;
104 } else {
105 error = sigaction1(p, linux_to_native_signo[sig],
106 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0,
107 NULL, 0);
108 if (error)
109 return (error);
110 }
111 if (SCARG(uap, osa)) {
112 native_to_linux_old_sigaction(&olsa, &obsa);
113 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
114 if (error)
115 return (error);
116 }
117 return (0);
118 }
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