linux_signal.c revision 293575 
1/*-
2 * Copyright (c) 1994-1995 S��ren Schmidt
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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
16 *
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.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/10/sys/compat/linux/linux_signal.c 293575 2016-01-09 17:29:08Z dchagin $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/lock.h>
35#include <sys/mutex.h>
36#include <sys/sx.h>
37#include <sys/proc.h>
38#include <sys/signalvar.h>
39#include <sys/syscallsubr.h>
40#include <sys/sysproto.h>
41
42#include <security/audit/audit.h>
43
44#include "opt_compat.h"
45
46#ifdef COMPAT_LINUX32
47#include <machine/../linux32/linux.h>
48#include <machine/../linux32/linux32_proto.h>
49#else
50#include <machine/../linux/linux.h>
51#include <machine/../linux/linux_proto.h>
52#endif
53#include <compat/linux/linux_signal.h>
54#include <compat/linux/linux_util.h>
55#include <compat/linux/linux_emul.h>
56#include <compat/linux/linux_misc.h>
57
58static int	linux_do_tkill(struct thread *td, struct thread *tdt,
59		    ksiginfo_t *ksi);
60static void	sicode_to_lsicode(int si_code, int *lsi_code);
61
62
63static void
64linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
65{
66
67	linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
68	bsa->sa_handler = PTRIN(lsa->lsa_handler);
69	bsa->sa_flags = 0;
70	if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
71		bsa->sa_flags |= SA_NOCLDSTOP;
72	if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
73		bsa->sa_flags |= SA_NOCLDWAIT;
74	if (lsa->lsa_flags & LINUX_SA_SIGINFO)
75		bsa->sa_flags |= SA_SIGINFO;
76	if (lsa->lsa_flags & LINUX_SA_ONSTACK)
77		bsa->sa_flags |= SA_ONSTACK;
78	if (lsa->lsa_flags & LINUX_SA_RESTART)
79		bsa->sa_flags |= SA_RESTART;
80	if (lsa->lsa_flags & LINUX_SA_ONESHOT)
81		bsa->sa_flags |= SA_RESETHAND;
82	if (lsa->lsa_flags & LINUX_SA_NOMASK)
83		bsa->sa_flags |= SA_NODEFER;
84}
85
86static void
87bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
88{
89
90	bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
91#ifdef COMPAT_LINUX32
92	lsa->lsa_handler = (uintptr_t)bsa->sa_handler;
93#else
94	lsa->lsa_handler = bsa->sa_handler;
95#endif
96	lsa->lsa_restorer = 0;		/* unsupported */
97	lsa->lsa_flags = 0;
98	if (bsa->sa_flags & SA_NOCLDSTOP)
99		lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
100	if (bsa->sa_flags & SA_NOCLDWAIT)
101		lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
102	if (bsa->sa_flags & SA_SIGINFO)
103		lsa->lsa_flags |= LINUX_SA_SIGINFO;
104	if (bsa->sa_flags & SA_ONSTACK)
105		lsa->lsa_flags |= LINUX_SA_ONSTACK;
106	if (bsa->sa_flags & SA_RESTART)
107		lsa->lsa_flags |= LINUX_SA_RESTART;
108	if (bsa->sa_flags & SA_RESETHAND)
109		lsa->lsa_flags |= LINUX_SA_ONESHOT;
110	if (bsa->sa_flags & SA_NODEFER)
111		lsa->lsa_flags |= LINUX_SA_NOMASK;
112}
113
114int
115linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
116		   l_sigaction_t *linux_osa)
117{
118	struct sigaction act, oact, *nsa, *osa;
119	int error, sig;
120
121	if (!LINUX_SIG_VALID(linux_sig))
122		return (EINVAL);
123
124	osa = (linux_osa != NULL) ? &oact : NULL;
125	if (linux_nsa != NULL) {
126		nsa = &act;
127		linux_to_bsd_sigaction(linux_nsa, nsa);
128	} else
129		nsa = NULL;
130	sig = linux_to_bsd_signal(linux_sig);
131
132	error = kern_sigaction(td, sig, nsa, osa, 0);
133	if (error)
134		return (error);
135
136	if (linux_osa != NULL)
137		bsd_to_linux_sigaction(osa, linux_osa);
138
139	return (0);
140}
141
142#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
143int
144linux_signal(struct thread *td, struct linux_signal_args *args)
145{
146	l_sigaction_t nsa, osa;
147	int error;
148
149#ifdef DEBUG
150	if (ldebug(signal))
151		printf(ARGS(signal, "%d, %p"),
152		    args->sig, (void *)(uintptr_t)args->handler);
153#endif
154
155	nsa.lsa_handler = args->handler;
156	nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
157	LINUX_SIGEMPTYSET(nsa.lsa_mask);
158
159	error = linux_do_sigaction(td, args->sig, &nsa, &osa);
160	td->td_retval[0] = (int)(intptr_t)osa.lsa_handler;
161
162	return (error);
163}
164#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
165
166int
167linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
168{
169	l_sigaction_t nsa, osa;
170	int error;
171
172#ifdef DEBUG
173	if (ldebug(rt_sigaction))
174		printf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
175		    (long)args->sig, (void *)args->act,
176		    (void *)args->oact, (long)args->sigsetsize);
177#endif
178
179	if (args->sigsetsize != sizeof(l_sigset_t))
180		return (EINVAL);
181
182	if (args->act != NULL) {
183		error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
184		if (error)
185			return (error);
186	}
187
188	error = linux_do_sigaction(td, args->sig,
189				   args->act ? &nsa : NULL,
190				   args->oact ? &osa : NULL);
191
192	if (args->oact != NULL && !error) {
193		error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
194	}
195
196	return (error);
197}
198
199static int
200linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
201		     l_sigset_t *old)
202{
203	sigset_t omask, nmask;
204	sigset_t *nmaskp;
205	int error;
206
207	td->td_retval[0] = 0;
208
209	switch (how) {
210	case LINUX_SIG_BLOCK:
211		how = SIG_BLOCK;
212		break;
213	case LINUX_SIG_UNBLOCK:
214		how = SIG_UNBLOCK;
215		break;
216	case LINUX_SIG_SETMASK:
217		how = SIG_SETMASK;
218		break;
219	default:
220		return (EINVAL);
221	}
222	if (new != NULL) {
223		linux_to_bsd_sigset(new, &nmask);
224		nmaskp = &nmask;
225	} else
226		nmaskp = NULL;
227	error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
228	if (error == 0 && old != NULL)
229		bsd_to_linux_sigset(&omask, old);
230
231	return (error);
232}
233
234#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
235int
236linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
237{
238	l_osigset_t mask;
239	l_sigset_t set, oset;
240	int error;
241
242#ifdef DEBUG
243	if (ldebug(sigprocmask))
244		printf(ARGS(sigprocmask, "%d, *, *"), args->how);
245#endif
246
247	if (args->mask != NULL) {
248		error = copyin(args->mask, &mask, sizeof(l_osigset_t));
249		if (error)
250			return (error);
251		LINUX_SIGEMPTYSET(set);
252		set.__mask = mask;
253	}
254
255	error = linux_do_sigprocmask(td, args->how,
256				     args->mask ? &set : NULL,
257				     args->omask ? &oset : NULL);
258
259	if (args->omask != NULL && !error) {
260		mask = oset.__mask;
261		error = copyout(&mask, args->omask, sizeof(l_osigset_t));
262	}
263
264	return (error);
265}
266#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
267
268int
269linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
270{
271	l_sigset_t set, oset;
272	int error;
273
274#ifdef DEBUG
275	if (ldebug(rt_sigprocmask))
276		printf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
277		    args->how, (void *)args->mask,
278		    (void *)args->omask, (long)args->sigsetsize);
279#endif
280
281	if (args->sigsetsize != sizeof(l_sigset_t))
282		return EINVAL;
283
284	if (args->mask != NULL) {
285		error = copyin(args->mask, &set, sizeof(l_sigset_t));
286		if (error)
287			return (error);
288	}
289
290	error = linux_do_sigprocmask(td, args->how,
291				     args->mask ? &set : NULL,
292				     args->omask ? &oset : NULL);
293
294	if (args->omask != NULL && !error) {
295		error = copyout(&oset, args->omask, sizeof(l_sigset_t));
296	}
297
298	return (error);
299}
300
301#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
302int
303linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
304{
305	struct proc *p = td->td_proc;
306	l_sigset_t mask;
307
308#ifdef DEBUG
309	if (ldebug(sgetmask))
310		printf(ARGS(sgetmask, ""));
311#endif
312
313	PROC_LOCK(p);
314	bsd_to_linux_sigset(&td->td_sigmask, &mask);
315	PROC_UNLOCK(p);
316	td->td_retval[0] = mask.__mask;
317	return (0);
318}
319
320int
321linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
322{
323	struct proc *p = td->td_proc;
324	l_sigset_t lset;
325	sigset_t bset;
326
327#ifdef DEBUG
328	if (ldebug(ssetmask))
329		printf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
330#endif
331
332	PROC_LOCK(p);
333	bsd_to_linux_sigset(&td->td_sigmask, &lset);
334	td->td_retval[0] = lset.__mask;
335	LINUX_SIGEMPTYSET(lset);
336	lset.__mask = args->mask;
337	linux_to_bsd_sigset(&lset, &bset);
338	td->td_sigmask = bset;
339	SIG_CANTMASK(td->td_sigmask);
340	signotify(td);
341	PROC_UNLOCK(p);
342	return (0);
343}
344
345int
346linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
347{
348	struct proc *p = td->td_proc;
349	sigset_t bset;
350	l_sigset_t lset;
351	l_osigset_t mask;
352
353#ifdef DEBUG
354	if (ldebug(sigpending))
355		printf(ARGS(sigpending, "*"));
356#endif
357
358	PROC_LOCK(p);
359	bset = p->p_siglist;
360	SIGSETOR(bset, td->td_siglist);
361	SIGSETAND(bset, td->td_sigmask);
362	PROC_UNLOCK(p);
363	bsd_to_linux_sigset(&bset, &lset);
364	mask = lset.__mask;
365	return (copyout(&mask, args->mask, sizeof(mask)));
366}
367#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
368
369/*
370 * MPSAFE
371 */
372int
373linux_rt_sigpending(struct thread *td, struct linux_rt_sigpending_args *args)
374{
375	struct proc *p = td->td_proc;
376	sigset_t bset;
377	l_sigset_t lset;
378
379	if (args->sigsetsize > sizeof(lset))
380		return EINVAL;
381		/* NOT REACHED */
382
383#ifdef DEBUG
384	if (ldebug(rt_sigpending))
385		printf(ARGS(rt_sigpending, "*"));
386#endif
387
388	PROC_LOCK(p);
389	bset = p->p_siglist;
390	SIGSETOR(bset, td->td_siglist);
391	SIGSETAND(bset, td->td_sigmask);
392	PROC_UNLOCK(p);
393	bsd_to_linux_sigset(&bset, &lset);
394	return (copyout(&lset, args->set, args->sigsetsize));
395}
396
397/*
398 * MPSAFE
399 */
400int
401linux_rt_sigtimedwait(struct thread *td,
402	struct linux_rt_sigtimedwait_args *args)
403{
404	int error, sig;
405	l_timeval ltv;
406	struct timeval tv;
407	struct timespec ts, *tsa;
408	l_sigset_t lset;
409	sigset_t bset;
410	l_siginfo_t linfo;
411	ksiginfo_t info;
412
413#ifdef DEBUG
414	if (ldebug(rt_sigtimedwait))
415		printf(ARGS(rt_sigtimedwait, "*"));
416#endif
417	if (args->sigsetsize != sizeof(l_sigset_t))
418		return (EINVAL);
419
420	if ((error = copyin(args->mask, &lset, sizeof(lset))))
421		return (error);
422	linux_to_bsd_sigset(&lset, &bset);
423
424	tsa = NULL;
425	if (args->timeout) {
426		if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
427			return (error);
428#ifdef DEBUG
429		if (ldebug(rt_sigtimedwait))
430			printf(LMSG("linux_rt_sigtimedwait: "
431			    "incoming timeout (%jd/%jd)\n"),
432			    (intmax_t)ltv.tv_sec, (intmax_t)ltv.tv_usec);
433#endif
434		tv.tv_sec = (long)ltv.tv_sec;
435		tv.tv_usec = (suseconds_t)ltv.tv_usec;
436		if (itimerfix(&tv)) {
437			/*
438			 * The timeout was invalid. Convert it to something
439			 * valid that will act as it does under Linux.
440			 */
441			tv.tv_sec += tv.tv_usec / 1000000;
442			tv.tv_usec %= 1000000;
443			if (tv.tv_usec < 0) {
444				tv.tv_sec -= 1;
445				tv.tv_usec += 1000000;
446			}
447			if (tv.tv_sec < 0)
448				timevalclear(&tv);
449#ifdef DEBUG
450			if (ldebug(rt_sigtimedwait))
451				printf(LMSG("linux_rt_sigtimedwait: "
452				    "converted timeout (%jd/%ld)\n"),
453				    (intmax_t)tv.tv_sec, tv.tv_usec);
454#endif
455		}
456		TIMEVAL_TO_TIMESPEC(&tv, &ts);
457		tsa = &ts;
458	}
459	error = kern_sigtimedwait(td, bset, &info, tsa);
460#ifdef DEBUG
461	if (ldebug(rt_sigtimedwait))
462		printf(LMSG("linux_rt_sigtimedwait: "
463		    "sigtimedwait returning (%d)\n"), error);
464#endif
465	if (error)
466		return (error);
467
468	sig = bsd_to_linux_signal(info.ksi_signo);
469
470	if (args->ptr) {
471		memset(&linfo, 0, sizeof(linfo));
472		ksiginfo_to_lsiginfo(&info, &linfo, sig);
473		error = copyout(&linfo, args->ptr, sizeof(linfo));
474	}
475	if (error == 0)
476		td->td_retval[0] = sig;
477
478	return (error);
479}
480
481int
482linux_kill(struct thread *td, struct linux_kill_args *args)
483{
484	struct kill_args /* {
485	    int pid;
486	    int signum;
487	} */ tmp;
488
489#ifdef DEBUG
490	if (ldebug(kill))
491		printf(ARGS(kill, "%d, %d"), args->pid, args->signum);
492#endif
493
494	/*
495	 * Allow signal 0 as a means to check for privileges
496	 */
497	if (!LINUX_SIG_VALID(args->signum) && args->signum != 0)
498		return (EINVAL);
499
500	if (args->signum > 0)
501		tmp.signum = linux_to_bsd_signal(args->signum);
502	else
503		tmp.signum = 0;
504
505	tmp.pid = args->pid;
506	return (sys_kill(td, &tmp));
507}
508
509static int
510linux_do_tkill(struct thread *td, struct thread *tdt, ksiginfo_t *ksi)
511{
512	struct proc *p;
513	int error;
514
515	p = tdt->td_proc;
516	AUDIT_ARG_SIGNUM(ksi->ksi_signo);
517	AUDIT_ARG_PID(p->p_pid);
518	AUDIT_ARG_PROCESS(p);
519
520	error = p_cansignal(td, p, ksi->ksi_signo);
521	if (error != 0 || ksi->ksi_signo == 0)
522		goto out;
523
524	tdksignal(tdt, ksi->ksi_signo, ksi);
525
526out:
527	PROC_UNLOCK(p);
528	return (error);
529}
530
531int
532linux_tgkill(struct thread *td, struct linux_tgkill_args *args)
533{
534	struct thread *tdt;
535	ksiginfo_t ksi;
536	int sig;
537
538#ifdef DEBUG
539	if (ldebug(tgkill))
540		printf(ARGS(tgkill, "%d, %d, %d"),
541		    args->tgid, args->pid, args->sig);
542#endif
543
544	if (args->pid <= 0 || args->tgid <=0)
545		return (EINVAL);
546
547	/*
548	 * Allow signal 0 as a means to check for privileges
549	 */
550	if (!LINUX_SIG_VALID(args->sig) && args->sig != 0)
551		return (EINVAL);
552
553	if (args->sig > 0)
554		sig = linux_to_bsd_signal(args->sig);
555	else
556		sig = 0;
557
558	tdt = linux_tdfind(td, args->pid, args->tgid);
559	if (tdt == NULL)
560		return (ESRCH);
561
562	ksiginfo_init(&ksi);
563	ksi.ksi_signo = sig;
564	ksi.ksi_code = SI_LWP;
565	ksi.ksi_errno = 0;
566	ksi.ksi_pid = td->td_proc->p_pid;
567	ksi.ksi_uid = td->td_proc->p_ucred->cr_ruid;
568	return (linux_do_tkill(td, tdt, &ksi));
569}
570
571/*
572 * Deprecated since 2.5.75. Replaced by tgkill().
573 */
574int
575linux_tkill(struct thread *td, struct linux_tkill_args *args)
576{
577	struct thread *tdt;
578	ksiginfo_t ksi;
579	int sig;
580
581#ifdef DEBUG
582	if (ldebug(tkill))
583		printf(ARGS(tkill, "%i, %i"), args->tid, args->sig);
584#endif
585	if (args->tid <= 0)
586		return (EINVAL);
587
588	if (!LINUX_SIG_VALID(args->sig))
589		return (EINVAL);
590
591	sig = linux_to_bsd_signal(args->sig);
592
593	tdt = linux_tdfind(td, args->tid, -1);
594	if (tdt == NULL)
595		return (ESRCH);
596
597	ksiginfo_init(&ksi);
598	ksi.ksi_signo = sig;
599	ksi.ksi_code = SI_LWP;
600	ksi.ksi_errno = 0;
601	ksi.ksi_pid = td->td_proc->p_pid;
602	ksi.ksi_uid = td->td_proc->p_ucred->cr_ruid;
603	return (linux_do_tkill(td, tdt, &ksi));
604}
605
606void
607ksiginfo_to_lsiginfo(const ksiginfo_t *ksi, l_siginfo_t *lsi, l_int sig)
608{
609
610	siginfo_to_lsiginfo(&ksi->ksi_info, lsi, sig);
611}
612
613static void
614sicode_to_lsicode(int si_code, int *lsi_code)
615{
616
617	switch (si_code) {
618	case SI_USER:
619		*lsi_code = LINUX_SI_USER;
620		break;
621	case SI_KERNEL:
622		*lsi_code = LINUX_SI_KERNEL;
623		break;
624	case SI_QUEUE:
625		*lsi_code = LINUX_SI_QUEUE;
626		break;
627	case SI_TIMER:
628		*lsi_code = LINUX_SI_TIMER;
629		break;
630	case SI_MESGQ:
631		*lsi_code = LINUX_SI_MESGQ;
632		break;
633	case SI_ASYNCIO:
634		*lsi_code = LINUX_SI_ASYNCIO;
635		break;
636	case SI_LWP:
637		*lsi_code = LINUX_SI_TKILL;
638		break;
639	default:
640		*lsi_code = si_code;
641		break;
642	}
643}
644
645void
646siginfo_to_lsiginfo(const siginfo_t *si, l_siginfo_t *lsi, l_int sig)
647{
648
649	/* sig alredy converted */
650	lsi->lsi_signo = sig;
651	sicode_to_lsicode(si->si_code, &lsi->lsi_code);
652
653	switch (si->si_code) {
654	case SI_LWP:
655		lsi->lsi_pid = si->si_pid;
656		lsi->lsi_uid = si->si_uid;
657		break;
658
659	case SI_TIMER:
660		lsi->lsi_int = si->si_value.sival_int;
661		lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
662		lsi->lsi_tid = si->si_timerid;
663		break;
664
665	case SI_QUEUE:
666		lsi->lsi_pid = si->si_pid;
667		lsi->lsi_uid = si->si_uid;
668		lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
669		break;
670
671	case SI_ASYNCIO:
672		lsi->lsi_int = si->si_value.sival_int;
673		lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
674		break;
675
676	default:
677		switch (sig) {
678		case LINUX_SIGPOLL:
679			/* XXX si_fd? */
680			lsi->lsi_band = si->si_band;
681			break;
682
683		case LINUX_SIGCHLD:
684			lsi->lsi_errno = 0;
685			lsi->lsi_pid = si->si_pid;
686			lsi->lsi_uid = si->si_uid;
687
688			if (si->si_code == CLD_STOPPED)
689				lsi->lsi_status = bsd_to_linux_signal(si->si_status);
690			else if (si->si_code == CLD_CONTINUED)
691				lsi->lsi_status = bsd_to_linux_signal(SIGCONT);
692			else
693				lsi->lsi_status = si->si_status;
694			break;
695
696		case LINUX_SIGBUS:
697		case LINUX_SIGILL:
698		case LINUX_SIGFPE:
699		case LINUX_SIGSEGV:
700			lsi->lsi_addr = PTROUT(si->si_addr);
701			break;
702
703		default:
704			lsi->lsi_pid = si->si_pid;
705			lsi->lsi_uid = si->si_uid;
706			if (sig >= LINUX_SIGRTMIN) {
707				lsi->lsi_int = si->si_value.sival_int;
708				lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
709			}
710			break;
711		}
712		break;
713	}
714}
715
716void
717lsiginfo_to_ksiginfo(const l_siginfo_t *lsi, ksiginfo_t *ksi, int sig)
718{
719
720	ksi->ksi_signo = sig;
721	ksi->ksi_code = lsi->lsi_code;	/* XXX. Convert. */
722	ksi->ksi_pid = lsi->lsi_pid;
723	ksi->ksi_uid = lsi->lsi_uid;
724	ksi->ksi_status = lsi->lsi_status;
725	ksi->ksi_addr = PTRIN(lsi->lsi_addr);
726	ksi->ksi_info.si_value.sival_int = lsi->lsi_int;
727}
728
729int
730linux_rt_sigqueueinfo(struct thread *td, struct linux_rt_sigqueueinfo_args *args)
731{
732	l_siginfo_t linfo;
733	struct proc *p;
734	ksiginfo_t ksi;
735	int error;
736	int sig;
737
738	if (!LINUX_SIG_VALID(args->sig))
739		return (EINVAL);
740
741	error = copyin(args->info, &linfo, sizeof(linfo));
742	if (error != 0)
743		return (error);
744
745	if (linfo.lsi_code >= 0)
746		return (EPERM);
747
748	sig = linux_to_bsd_signal(args->sig);
749
750	error = ESRCH;
751	if ((p = pfind(args->pid)) != NULL ||
752	    (p = zpfind(args->pid)) != NULL) {
753		error = p_cansignal(td, p, sig);
754		if (error != 0) {
755			PROC_UNLOCK(p);
756			return (error);
757		}
758
759		ksiginfo_init(&ksi);
760		lsiginfo_to_ksiginfo(&linfo, &ksi, sig);
761		error = tdsendsignal(p, NULL, sig, &ksi);
762		PROC_UNLOCK(p);
763	}
764
765	return (error);
766}
767