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 without 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_emuldata.h"
47 #include "linux_signal.h"
48 #include "linux_util.h"
51 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
56 bss->__bits[0] = lss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
57 bss->__bits[1] = lss->__bits[1];
58 for (l = 1; l <= LINUX_SIGTBLSZ; l++) {
59 if (LINUX_SIGISMEMBER(*lss, l)) {
60 b = linux_to_bsd_signal[_SIG_IDX(l)];
68 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
72 LINUX_SIGEMPTYSET(*lss);
73 lss->__bits[0] = bss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
74 lss->__bits[1] = bss->__bits[1];
75 for (b = 1; b <= LINUX_SIGTBLSZ; b++) {
76 if (SIGISMEMBER(*bss, b)) {
77 l = bsd_to_linux_signal[_SIG_IDX(b)];
79 LINUX_SIGADDSET(*lss, l);
85 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
88 linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
89 bsa->sa_handler = lsa->lsa_handler;
91 if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
92 bsa->sa_flags |= SA_NOCLDSTOP;
93 if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
94 bsa->sa_flags |= SA_NOCLDWAIT;
95 if (lsa->lsa_flags & LINUX_SA_SIGINFO)
96 bsa->sa_flags |= SA_SIGINFO;
97 if (lsa->lsa_flags & LINUX_SA_ONSTACK)
98 bsa->sa_flags |= SA_ONSTACK;
99 if (lsa->lsa_flags & LINUX_SA_RESTART)
100 bsa->sa_flags |= SA_RESTART;
101 if (lsa->lsa_flags & LINUX_SA_ONESHOT)
102 bsa->sa_flags |= SA_RESETHAND;
103 if (lsa->lsa_flags & LINUX_SA_NOMASK)
104 bsa->sa_flags |= SA_NODEFER;
108 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
111 bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
112 lsa->lsa_handler = bsa->sa_handler;
113 lsa->lsa_restorer = NULL; /* unsupported */
115 if (bsa->sa_flags & SA_NOCLDSTOP)
116 lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
117 if (bsa->sa_flags & SA_NOCLDWAIT)
118 lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
119 if (bsa->sa_flags & SA_SIGINFO)
120 lsa->lsa_flags |= LINUX_SA_SIGINFO;
121 if (bsa->sa_flags & SA_ONSTACK)
122 lsa->lsa_flags |= LINUX_SA_ONSTACK;
123 if (bsa->sa_flags & SA_RESTART)
124 lsa->lsa_flags |= LINUX_SA_RESTART;
125 if (bsa->sa_flags & SA_RESETHAND)
126 lsa->lsa_flags |= LINUX_SA_ONESHOT;
127 if (bsa->sa_flags & SA_NODEFER)
128 lsa->lsa_flags |= LINUX_SA_NOMASK;
135 sys_linux_signal(struct linux_signal_args *args)
137 l_sigaction_t linux_nsa, linux_osa;
138 struct sigaction nsa, osa;
143 kprintf(ARGS(signal, "%d, %p"),
144 args->sig, (void *)args->handler);
146 linux_nsa.lsa_handler = args->handler;
147 linux_nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
148 LINUX_SIGEMPTYSET(linux_nsa.lsa_mask);
149 linux_to_bsd_sigaction(&linux_nsa, &nsa);
150 if (args->sig <= LINUX_SIGTBLSZ) {
151 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
157 error = kern_sigaction(sig, &nsa, &osa);
160 bsd_to_linux_sigaction(&osa, &linux_osa);
161 args->sysmsg_result = (int) linux_osa.lsa_handler;
169 sys_linux_rt_sigaction(struct linux_rt_sigaction_args *args)
171 l_sigaction_t linux_nsa, linux_osa;
172 struct sigaction nsa, osa;
176 if (ldebug(rt_sigaction))
177 kprintf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
178 (long)args->sig, (void *)args->act,
179 (void *)args->oact, (long)args->sigsetsize);
181 if (args->sigsetsize != sizeof(l_sigset_t))
185 error = copyin(args->act, &linux_nsa, sizeof(linux_nsa));
188 linux_to_bsd_sigaction(&linux_nsa, &nsa);
190 if (args->sig <= LINUX_SIGTBLSZ) {
191 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
197 error = kern_sigaction(sig, args->act ? &nsa : NULL,
198 args->oact ? &osa : NULL);
201 if (error == 0 && args->oact) {
202 bsd_to_linux_sigaction(&osa, &linux_osa);
203 error = copyout(&linux_osa, args->oact, sizeof(linux_osa));
210 linux_to_bsd_sigprocmask(int how)
213 case LINUX_SIG_BLOCK:
215 case LINUX_SIG_UNBLOCK:
217 case LINUX_SIG_SETMASK:
228 sys_linux_sigprocmask(struct linux_sigprocmask_args *args)
231 l_sigset_t linux_set, linux_oset;
236 if (ldebug(sigprocmask))
237 kprintf(ARGS(sigprocmask, "%d, *, *"), args->how);
241 error = copyin(args->mask, &mask, sizeof(l_osigset_t));
244 LINUX_SIGEMPTYSET(linux_set);
245 linux_set.__bits[0] = mask;
246 linux_to_bsd_sigset(&linux_set, &set);
248 how = linux_to_bsd_sigprocmask(args->how);
251 error = kern_sigprocmask(how, args->mask ? &set : NULL,
252 args->omask ? &oset : NULL);
255 if (error == 0 && args->omask) {
256 bsd_to_linux_sigset(&oset, &linux_oset);
257 mask = linux_oset.__bits[0];
258 error = copyout(&mask, args->omask, sizeof(l_osigset_t));
267 sys_linux_rt_sigprocmask(struct linux_rt_sigprocmask_args *args)
269 l_sigset_t linux_set, linux_oset;
274 if (ldebug(rt_sigprocmask))
275 kprintf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
276 args->how, (void *)args->mask,
277 (void *)args->omask, (long)args->sigsetsize);
280 if (args->sigsetsize != sizeof(l_sigset_t))
284 error = copyin(args->mask, &linux_set, sizeof(l_sigset_t));
287 linux_to_bsd_sigset(&linux_set, &set);
289 how = linux_to_bsd_sigprocmask(args->how);
292 error = kern_sigprocmask(how, args->mask ? &set : NULL,
293 args->omask ? &oset : NULL);
296 if (error == 0 && args->omask) {
297 bsd_to_linux_sigset(&oset, &linux_oset);
298 error = copyout(&linux_oset, args->omask, sizeof(l_sigset_t));
308 sys_linux_sgetmask(struct linux_sgetmask_args *args)
310 struct lwp *lp = curthread->td_lwp;
314 if (ldebug(sgetmask))
315 kprintf(ARGS(sgetmask, ""));
318 bsd_to_linux_sigset(&lp->lwp_sigmask, &mask);
319 args->sysmsg_result = mask.__bits[0];
327 sys_linux_ssetmask(struct linux_ssetmask_args *args)
329 struct lwp *lp = curthread->td_lwp;
334 if (ldebug(ssetmask))
335 kprintf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
338 bsd_to_linux_sigset(&lp->lwp_sigmask, &lset);
339 args->sysmsg_result = lset.__bits[0];
340 LINUX_SIGEMPTYSET(lset);
341 lset.__bits[0] = args->mask;
342 linux_to_bsd_sigset(&lset, &bset);
344 lp->lwp_sigmask = bset;
345 SIG_CANTMASK(lp->lwp_sigmask);
354 sys_linux_sigpending(struct linux_sigpending_args *args)
356 struct thread *td = curthread;
357 struct lwp *lp = td->td_lwp;
359 l_sigset_t linux_set;
364 if (ldebug(sigpending))
365 kprintf(ARGS(sigpending, "*"));
368 error = kern_sigpending(&set);
371 SIGSETAND(set, lp->lwp_sigmask);
372 bsd_to_linux_sigset(&set, &linux_set);
373 mask = linux_set.__bits[0];
374 error = copyout(&mask, args->mask, sizeof(mask));
383 sys_linux_kill(struct linux_kill_args *args)
389 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);
411 linux_do_tkill(l_int tgid, l_int pid, l_int sig)
413 struct linux_emuldata *em;
418 * Allow signal 0 as a means to check for privileges
420 if (sig < 0 || sig > LINUX_NSIG)
423 if (sig > 0 && sig <= LINUX_SIGTBLSZ)
424 sig = linux_to_bsd_signal[_SIG_IDX(sig)];
427 lwkt_gettoken(&proc_token);
428 if ((p = pfind(pid)) == NULL) {
429 if ((p = zpfind(pid)) == NULL) {
437 em = emuldata_get(p);
445 if (tgid > 0 && em->s->group_pid != tgid) {
452 error = kern_kill(sig, pid, -1);
456 lwkt_reltoken(&proc_token);
463 sys_linux_tgkill(struct linux_tgkill_args *args)
468 kprintf(ARGS(tgkill, "%d, %d, %d"), args->tgid, args->pid, args->sig);
470 if (args->pid <= 0 || args->tgid <= 0)
473 return (linux_do_tkill(args->tgid, args->pid, args->sig));
477 sys_linux_tkill(struct linux_tkill_args *args)
481 kprintf(ARGS(tkill, "%i, %i"), args->tid, args->sig);
486 return (linux_do_tkill(0, args->tid, args->sig));