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.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/mutex.h>
38 #include <sys/signalvar.h>
39 #include <sys/syscallsubr.h>
40 #include <sys/sysproto.h>
42 #include <security/audit/audit.h>
44 #include "opt_compat.h"
47 #include <machine/../linux32/linux.h>
48 #include <machine/../linux32/linux32_proto.h>
50 #include <machine/../linux/linux.h>
51 #include <machine/../linux/linux_proto.h>
53 #include <compat/linux/linux_signal.h>
54 #include <compat/linux/linux_util.h>
55 #include <compat/linux/linux_emul.h>
58 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
63 bss->__bits[0] = lss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
64 bss->__bits[1] = lss->__bits[1];
65 for (l = 1; l <= LINUX_SIGTBLSZ; l++) {
66 if (LINUX_SIGISMEMBER(*lss, l)) {
67 b = linux_to_bsd_signal[_SIG_IDX(l)];
75 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
79 LINUX_SIGEMPTYSET(*lss);
80 lss->__bits[0] = bss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
81 lss->__bits[1] = bss->__bits[1];
82 for (b = 1; b <= LINUX_SIGTBLSZ; b++) {
83 if (SIGISMEMBER(*bss, b)) {
84 l = bsd_to_linux_signal[_SIG_IDX(b)];
86 LINUX_SIGADDSET(*lss, l);
92 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
95 linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
96 bsa->sa_handler = PTRIN(lsa->lsa_handler);
98 if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
99 bsa->sa_flags |= SA_NOCLDSTOP;
100 if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
101 bsa->sa_flags |= SA_NOCLDWAIT;
102 if (lsa->lsa_flags & LINUX_SA_SIGINFO)
103 bsa->sa_flags |= SA_SIGINFO;
104 if (lsa->lsa_flags & LINUX_SA_ONSTACK)
105 bsa->sa_flags |= SA_ONSTACK;
106 if (lsa->lsa_flags & LINUX_SA_RESTART)
107 bsa->sa_flags |= SA_RESTART;
108 if (lsa->lsa_flags & LINUX_SA_ONESHOT)
109 bsa->sa_flags |= SA_RESETHAND;
110 if (lsa->lsa_flags & LINUX_SA_NOMASK)
111 bsa->sa_flags |= SA_NODEFER;
115 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
118 bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
119 #ifdef COMPAT_LINUX32
120 lsa->lsa_handler = (uintptr_t)bsa->sa_handler;
122 lsa->lsa_handler = bsa->sa_handler;
124 lsa->lsa_restorer = 0; /* unsupported */
126 if (bsa->sa_flags & SA_NOCLDSTOP)
127 lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
128 if (bsa->sa_flags & SA_NOCLDWAIT)
129 lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
130 if (bsa->sa_flags & SA_SIGINFO)
131 lsa->lsa_flags |= LINUX_SA_SIGINFO;
132 if (bsa->sa_flags & SA_ONSTACK)
133 lsa->lsa_flags |= LINUX_SA_ONSTACK;
134 if (bsa->sa_flags & SA_RESTART)
135 lsa->lsa_flags |= LINUX_SA_RESTART;
136 if (bsa->sa_flags & SA_RESETHAND)
137 lsa->lsa_flags |= LINUX_SA_ONESHOT;
138 if (bsa->sa_flags & SA_NODEFER)
139 lsa->lsa_flags |= LINUX_SA_NOMASK;
143 linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
144 l_sigaction_t *linux_osa)
146 struct sigaction act, oact, *nsa, *osa;
149 if (!LINUX_SIG_VALID(linux_sig))
152 osa = (linux_osa != NULL) ? &oact : NULL;
153 if (linux_nsa != NULL) {
155 linux_to_bsd_sigaction(linux_nsa, nsa);
159 if (linux_sig <= LINUX_SIGTBLSZ)
160 sig = linux_to_bsd_signal[_SIG_IDX(linux_sig)];
164 error = kern_sigaction(td, sig, nsa, osa, 0);
168 if (linux_osa != NULL)
169 bsd_to_linux_sigaction(osa, linux_osa);
176 linux_signal(struct thread *td, struct linux_signal_args *args)
178 l_sigaction_t nsa, osa;
183 printf(ARGS(signal, "%d, %p"),
184 args->sig, (void *)(uintptr_t)args->handler);
187 nsa.lsa_handler = args->handler;
188 nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
189 LINUX_SIGEMPTYSET(nsa.lsa_mask);
191 error = linux_do_sigaction(td, args->sig, &nsa, &osa);
192 td->td_retval[0] = (int)(intptr_t)osa.lsa_handler;
198 linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
200 l_sigaction_t nsa, osa;
204 if (ldebug(rt_sigaction))
205 printf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
206 (long)args->sig, (void *)args->act,
207 (void *)args->oact, (long)args->sigsetsize);
210 if (args->sigsetsize != sizeof(l_sigset_t))
213 if (args->act != NULL) {
214 error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
219 error = linux_do_sigaction(td, args->sig,
220 args->act ? &nsa : NULL,
221 args->oact ? &osa : NULL);
223 if (args->oact != NULL && !error) {
224 error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
231 linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
234 sigset_t omask, nmask;
238 td->td_retval[0] = 0;
241 case LINUX_SIG_BLOCK:
244 case LINUX_SIG_UNBLOCK:
247 case LINUX_SIG_SETMASK:
254 linux_to_bsd_sigset(new, &nmask);
258 error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
259 if (error == 0 && old != NULL)
260 bsd_to_linux_sigset(&omask, old);
266 linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
269 l_sigset_t set, oset;
273 if (ldebug(sigprocmask))
274 printf(ARGS(sigprocmask, "%d, *, *"), args->how);
277 if (args->mask != NULL) {
278 error = copyin(args->mask, &mask, sizeof(l_osigset_t));
281 LINUX_SIGEMPTYSET(set);
282 set.__bits[0] = mask;
285 error = linux_do_sigprocmask(td, args->how,
286 args->mask ? &set : NULL,
287 args->omask ? &oset : NULL);
289 if (args->omask != NULL && !error) {
290 mask = oset.__bits[0];
291 error = copyout(&mask, args->omask, sizeof(l_osigset_t));
298 linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
300 l_sigset_t set, oset;
304 if (ldebug(rt_sigprocmask))
305 printf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
306 args->how, (void *)args->mask,
307 (void *)args->omask, (long)args->sigsetsize);
310 if (args->sigsetsize != sizeof(l_sigset_t))
313 if (args->mask != NULL) {
314 error = copyin(args->mask, &set, sizeof(l_sigset_t));
319 error = linux_do_sigprocmask(td, args->how,
320 args->mask ? &set : NULL,
321 args->omask ? &oset : NULL);
323 if (args->omask != NULL && !error) {
324 error = copyout(&oset, args->omask, sizeof(l_sigset_t));
331 linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
333 struct proc *p = td->td_proc;
337 if (ldebug(sgetmask))
338 printf(ARGS(sgetmask, ""));
342 bsd_to_linux_sigset(&td->td_sigmask, &mask);
344 td->td_retval[0] = mask.__bits[0];
349 linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
351 struct proc *p = td->td_proc;
356 if (ldebug(ssetmask))
357 printf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
361 bsd_to_linux_sigset(&td->td_sigmask, &lset);
362 td->td_retval[0] = lset.__bits[0];
363 LINUX_SIGEMPTYSET(lset);
364 lset.__bits[0] = args->mask;
365 linux_to_bsd_sigset(&lset, &bset);
366 td->td_sigmask = bset;
367 SIG_CANTMASK(td->td_sigmask);
377 linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
379 struct proc *p = td->td_proc;
385 if (ldebug(sigpending))
386 printf(ARGS(sigpending, "*"));
391 SIGSETOR(bset, td->td_siglist);
392 SIGSETAND(bset, td->td_sigmask);
394 bsd_to_linux_sigset(&bset, &lset);
395 mask = lset.__bits[0];
396 return (copyout(&mask, args->mask, sizeof(mask)));
403 linux_rt_sigpending(struct thread *td, struct linux_rt_sigpending_args *args)
405 struct proc *p = td->td_proc;
409 if (args->sigsetsize > sizeof(lset))
414 if (ldebug(rt_sigpending))
415 printf(ARGS(rt_sigpending, "*"));
420 SIGSETOR(bset, td->td_siglist);
421 SIGSETAND(bset, td->td_sigmask);
423 bsd_to_linux_sigset(&bset, &lset);
424 return (copyout(&lset, args->set, args->sigsetsize));
431 linux_rt_sigtimedwait(struct thread *td,
432 struct linux_rt_sigtimedwait_args *args)
437 struct timespec ts, *tsa;
444 if (ldebug(rt_sigtimedwait))
445 printf(ARGS(rt_sigtimedwait, "*"));
447 if (args->sigsetsize != sizeof(l_sigset_t))
450 if ((error = copyin(args->mask, &lset, sizeof(lset))))
452 linux_to_bsd_sigset(&lset, &bset);
456 if ((error = copyin(args->timeout, <v, sizeof(ltv))))
459 if (ldebug(rt_sigtimedwait))
460 printf(LMSG("linux_rt_sigtimedwait: "
461 "incoming timeout (%d/%d)\n"),
462 ltv.tv_sec, ltv.tv_usec);
464 tv.tv_sec = (long)ltv.tv_sec;
465 tv.tv_usec = (suseconds_t)ltv.tv_usec;
466 if (itimerfix(&tv)) {
468 * The timeout was invalid. Convert it to something
469 * valid that will act as it does under Linux.
471 tv.tv_sec += tv.tv_usec / 1000000;
472 tv.tv_usec %= 1000000;
473 if (tv.tv_usec < 0) {
475 tv.tv_usec += 1000000;
480 if (ldebug(rt_sigtimedwait))
481 printf(LMSG("linux_rt_sigtimedwait: "
482 "converted timeout (%jd/%ld)\n"),
483 (intmax_t)tv.tv_sec, tv.tv_usec);
486 TIMEVAL_TO_TIMESPEC(&tv, &ts);
489 error = kern_sigtimedwait(td, bset, &info, tsa);
491 if (ldebug(rt_sigtimedwait))
492 printf(LMSG("linux_rt_sigtimedwait: "
493 "sigtimedwait returning (%d)\n"), error);
498 sig = BSD_TO_LINUX_SIGNAL(info.ksi_signo);
501 memset(&linfo, 0, sizeof(linfo));
502 ksiginfo_to_lsiginfo(&info, &linfo, sig);
503 error = copyout(&linfo, args->ptr, sizeof(linfo));
506 td->td_retval[0] = sig;
512 linux_kill(struct thread *td, struct linux_kill_args *args)
514 struct kill_args /* {
521 printf(ARGS(kill, "%d, %d"), args->pid, args->signum);
525 * Allow signal 0 as a means to check for privileges
527 if (!LINUX_SIG_VALID(args->signum) && args->signum != 0)
530 if (args->signum > 0 && args->signum <= LINUX_SIGTBLSZ)
531 tmp.signum = linux_to_bsd_signal[_SIG_IDX(args->signum)];
533 tmp.signum = args->signum;
536 return (sys_kill(td, &tmp));
540 linux_do_tkill(struct thread *td, l_int tgid, l_int pid, l_int signum)
542 struct proc *proc = td->td_proc;
543 struct linux_emuldata *em;
548 AUDIT_ARG_SIGNUM(signum);
552 * Allow signal 0 as a means to check for privileges
554 if (!LINUX_SIG_VALID(signum) && signum != 0)
557 if (signum > 0 && signum <= LINUX_SIGTBLSZ)
558 signum = linux_to_bsd_signal[_SIG_IDX(signum)];
560 if ((p = pfind(pid)) == NULL) {
561 if ((p = zpfind(pid)) == NULL)
565 AUDIT_ARG_PROCESS(p);
566 error = p_cansignal(td, p, signum);
567 if (error != 0 || signum == 0)
571 em = em_find(p, EMUL_DONTLOCK);
575 printf("emuldata not found in do_tkill.\n");
579 if (tgid > 0 && em->shared->group_pid != tgid)
583 ksi.ksi_signo = signum;
584 ksi.ksi_code = LINUX_SI_TKILL;
586 ksi.ksi_pid = proc->p_pid;
587 ksi.ksi_uid = proc->p_ucred->cr_ruid;
589 error = pksignal(p, ksi.ksi_signo, &ksi);
597 linux_tgkill(struct thread *td, struct linux_tgkill_args *args)
602 printf(ARGS(tgkill, "%d, %d, %d"), args->tgid, args->pid, args->sig);
604 if (args->pid <= 0 || args->tgid <=0)
607 return (linux_do_tkill(td, args->tgid, args->pid, args->sig));
611 linux_tkill(struct thread *td, struct linux_tkill_args *args)
615 printf(ARGS(tkill, "%i, %i"), args->tid, args->sig);
620 return (linux_do_tkill(td, 0, args->tid, args->sig));
624 ksiginfo_to_lsiginfo(ksiginfo_t *ksi, l_siginfo_t *lsi, l_int sig)
627 lsi->lsi_signo = sig;
628 lsi->lsi_code = ksi->ksi_code;
633 lsi->lsi_band = ksi->ksi_band;
636 lsi->lsi_pid = ksi->ksi_pid;
637 lsi->lsi_uid = ksi->ksi_uid;
638 lsi->lsi_status = ksi->ksi_status;
644 lsi->lsi_addr = PTROUT(ksi->ksi_addr);
647 /* XXX SI_TIMER etc... */
648 lsi->lsi_pid = ksi->ksi_pid;
649 lsi->lsi_uid = ksi->ksi_uid;
652 if (sig >= LINUX_SIGRTMIN) {
653 lsi->lsi_int = ksi->ksi_info.si_value.sival_int;
654 lsi->lsi_ptr = PTROUT(ksi->ksi_info.si_value.sival_ptr);