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 |
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 |
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 |
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 |
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 |
161 | linux_sys_pause(struct lwp *l, const void *v, register_t *retval) |
162 | { |
163 | |
164 | return (sigsuspend1(l, 0)); |
165 | } |
166 | |
167 | |