2 * Copyright (c) 1994-1995 Søren Schmidt
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software withough specific prior written permission
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * $FreeBSD: src/sys/compat/linux/linux_signal.c,v 1.23.2.3 2001/11/05 19:08:23 marcel Exp $
29 * $DragonFly: src/sys/emulation/linux/linux_signal.c,v 1.14 2007/03/12 21:07:42 corecode Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
36 #include <sys/signalvar.h>
37 #include <sys/sysproto.h>
38 #include <sys/kern_syscall.h>
39 #include <sys/thread.h>
41 #include <sys/thread2.h>
42 #include <sys/mplock2.h>
44 #include <arch_linux/linux.h>
45 #include <arch_linux/linux_proto.h>
46 #include "linux_signal.h"
47 #include "linux_util.h"
50 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
55 bss->__bits[0] = lss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
56 bss->__bits[1] = lss->__bits[1];
57 for (l = 1; l <= LINUX_SIGTBLSZ; l++) {
58 if (LINUX_SIGISMEMBER(*lss, l)) {
59 b = linux_to_bsd_signal[_SIG_IDX(l)];
67 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
71 LINUX_SIGEMPTYSET(*lss);
72 lss->__bits[0] = bss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
73 lss->__bits[1] = bss->__bits[1];
74 for (b = 1; b <= LINUX_SIGTBLSZ; b++) {
75 if (SIGISMEMBER(*bss, b)) {
76 l = bsd_to_linux_signal[_SIG_IDX(b)];
78 LINUX_SIGADDSET(*lss, l);
84 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
87 linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
88 bsa->sa_handler = lsa->lsa_handler;
90 if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
91 bsa->sa_flags |= SA_NOCLDSTOP;
92 if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
93 bsa->sa_flags |= SA_NOCLDWAIT;
94 if (lsa->lsa_flags & LINUX_SA_SIGINFO)
95 bsa->sa_flags |= SA_SIGINFO;
96 if (lsa->lsa_flags & LINUX_SA_ONSTACK)
97 bsa->sa_flags |= SA_ONSTACK;
98 if (lsa->lsa_flags & LINUX_SA_RESTART)
99 bsa->sa_flags |= SA_RESTART;
100 if (lsa->lsa_flags & LINUX_SA_ONESHOT)
101 bsa->sa_flags |= SA_RESETHAND;
102 if (lsa->lsa_flags & LINUX_SA_NOMASK)
103 bsa->sa_flags |= SA_NODEFER;
107 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
110 bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
111 lsa->lsa_handler = bsa->sa_handler;
112 lsa->lsa_restorer = NULL; /* unsupported */
114 if (bsa->sa_flags & SA_NOCLDSTOP)
115 lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
116 if (bsa->sa_flags & SA_NOCLDWAIT)
117 lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
118 if (bsa->sa_flags & SA_SIGINFO)
119 lsa->lsa_flags |= LINUX_SA_SIGINFO;
120 if (bsa->sa_flags & SA_ONSTACK)
121 lsa->lsa_flags |= LINUX_SA_ONSTACK;
122 if (bsa->sa_flags & SA_RESTART)
123 lsa->lsa_flags |= LINUX_SA_RESTART;
124 if (bsa->sa_flags & SA_RESETHAND)
125 lsa->lsa_flags |= LINUX_SA_ONESHOT;
126 if (bsa->sa_flags & SA_NODEFER)
127 lsa->lsa_flags |= LINUX_SA_NOMASK;
134 sys_linux_signal(struct linux_signal_args *args)
136 l_sigaction_t linux_nsa, linux_osa;
137 struct sigaction nsa, osa;
142 kprintf(ARGS(signal, "%d, %p"),
143 args->sig, (void *)args->handler);
145 linux_nsa.lsa_handler = args->handler;
146 linux_nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
147 LINUX_SIGEMPTYSET(linux_nsa.lsa_mask);
148 linux_to_bsd_sigaction(&linux_nsa, &nsa);
149 if (args->sig <= LINUX_SIGTBLSZ) {
150 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
156 error = kern_sigaction(sig, &nsa, &osa);
159 bsd_to_linux_sigaction(&osa, &linux_osa);
160 args->sysmsg_result = (int) linux_osa.lsa_handler;
168 sys_linux_rt_sigaction(struct linux_rt_sigaction_args *args)
170 l_sigaction_t linux_nsa, linux_osa;
171 struct sigaction nsa, osa;
175 if (ldebug(rt_sigaction))
176 kprintf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
177 (long)args->sig, (void *)args->act,
178 (void *)args->oact, (long)args->sigsetsize);
180 if (args->sigsetsize != sizeof(l_sigset_t))
184 error = copyin(args->act, &linux_nsa, sizeof(linux_nsa));
187 linux_to_bsd_sigaction(&linux_nsa, &nsa);
189 if (args->sig <= LINUX_SIGTBLSZ) {
190 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
196 error = kern_sigaction(sig, args->act ? &nsa : NULL,
197 args->oact ? &osa : NULL);
200 if (error == 0 && args->oact) {
201 bsd_to_linux_sigaction(&osa, &linux_osa);
202 error = copyout(&linux_osa, args->oact, sizeof(linux_osa));
209 linux_to_bsd_sigprocmask(int how)
212 case LINUX_SIG_BLOCK:
214 case LINUX_SIG_UNBLOCK:
216 case LINUX_SIG_SETMASK:
227 sys_linux_sigprocmask(struct linux_sigprocmask_args *args)
230 l_sigset_t linux_set, linux_oset;
235 if (ldebug(sigprocmask))
236 kprintf(ARGS(sigprocmask, "%d, *, *"), args->how);
240 error = copyin(args->mask, &mask, sizeof(l_osigset_t));
243 LINUX_SIGEMPTYSET(linux_set);
244 linux_set.__bits[0] = mask;
245 linux_to_bsd_sigset(&linux_set, &set);
247 how = linux_to_bsd_sigprocmask(args->how);
250 error = kern_sigprocmask(how, args->mask ? &set : NULL,
251 args->omask ? &oset : NULL);
254 if (error == 0 && args->omask) {
255 bsd_to_linux_sigset(&oset, &linux_oset);
256 mask = linux_oset.__bits[0];
257 error = copyout(&mask, args->omask, sizeof(l_osigset_t));
266 sys_linux_rt_sigprocmask(struct linux_rt_sigprocmask_args *args)
268 l_sigset_t linux_set, linux_oset;
273 if (ldebug(rt_sigprocmask))
274 kprintf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
275 args->how, (void *)args->mask,
276 (void *)args->omask, (long)args->sigsetsize);
279 if (args->sigsetsize != sizeof(l_sigset_t))
283 error = copyin(args->mask, &linux_set, sizeof(l_sigset_t));
286 linux_to_bsd_sigset(&linux_set, &set);
288 how = linux_to_bsd_sigprocmask(args->how);
291 error = kern_sigprocmask(how, args->mask ? &set : NULL,
292 args->omask ? &oset : NULL);
295 if (error == 0 && args->omask) {
296 bsd_to_linux_sigset(&oset, &linux_oset);
297 error = copyout(&linux_oset, args->omask, sizeof(l_sigset_t));
307 sys_linux_sgetmask(struct linux_sgetmask_args *args)
309 struct lwp *lp = curthread->td_lwp;
313 if (ldebug(sgetmask))
314 kprintf(ARGS(sgetmask, ""));
317 bsd_to_linux_sigset(&lp->lwp_sigmask, &mask);
318 args->sysmsg_result = mask.__bits[0];
326 sys_linux_ssetmask(struct linux_ssetmask_args *args)
328 struct lwp *lp = curthread->td_lwp;
333 if (ldebug(ssetmask))
334 kprintf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
337 bsd_to_linux_sigset(&lp->lwp_sigmask, &lset);
338 args->sysmsg_result = lset.__bits[0];
339 LINUX_SIGEMPTYSET(lset);
340 lset.__bits[0] = args->mask;
341 linux_to_bsd_sigset(&lset, &bset);
343 lp->lwp_sigmask = bset;
344 SIG_CANTMASK(lp->lwp_sigmask);
353 sys_linux_sigpending(struct linux_sigpending_args *args)
355 struct thread *td = curthread;
356 struct lwp *lp = td->td_lwp;
358 l_sigset_t linux_set;
363 if (ldebug(sigpending))
364 kprintf(ARGS(sigpending, "*"));
367 error = kern_sigpending(&set);
370 SIGSETAND(set, lp->lwp_sigmask);
371 bsd_to_linux_sigset(&set, &linux_set);
372 mask = linux_set.__bits[0];
373 error = copyout(&mask, args->mask, sizeof(mask));
382 sys_linux_kill(struct linux_kill_args *args)
388 kprintf(ARGS(kill, "%d, %d"), args->pid, args->signum);
392 * Allow signal 0 as a means to check for privileges
394 if (args->signum < 0 || args->signum > LINUX_NSIG)
397 if (args->signum > 0 && args->signum <= LINUX_SIGTBLSZ)
398 sig = linux_to_bsd_signal[_SIG_IDX(args->signum)];
403 error = kern_kill(sig, args->pid, -1);