xref: /freebsd/sys/compat/linux/linux_signal.c (revision 97cb52fa9aefd90fad38790fded50905aeeb9b9e) 
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1994-1995 Søren Schmidt
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer
12  *    in this position and unchanged.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33 
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/lock.h>
37 #include <sys/mutex.h>
38 #include <sys/sx.h>
39 #include <sys/proc.h>
40 #include <sys/signalvar.h>
41 #include <sys/syscallsubr.h>
42 #include <sys/sysproto.h>
43 
44 #include <security/audit/audit.h>
45 
46 #include "opt_compat.h"
47 
48 #ifdef COMPAT_LINUX32
49 #include <machine/../linux32/linux.h>
50 #include <machine/../linux32/linux32_proto.h>
51 #else
52 #include <machine/../linux/linux.h>
53 #include <machine/../linux/linux_proto.h>
54 #endif
55 #include <compat/linux/linux_signal.h>
56 #include <compat/linux/linux_util.h>
57 #include <compat/linux/linux_emul.h>
58 #include <compat/linux/linux_misc.h>
59 
60 static int	linux_do_tkill(struct thread *td, struct thread *tdt,
61 		    ksiginfo_t *ksi);
62 static void	sicode_to_lsicode(int si_code, int *lsi_code);
63 
64 
65 static void
66 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
67 {
68 
69 	linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
70 	bsa->sa_handler = PTRIN(lsa->lsa_handler);
71 	bsa->sa_flags = 0;
72 	if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
73 		bsa->sa_flags |= SA_NOCLDSTOP;
74 	if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
75 		bsa->sa_flags |= SA_NOCLDWAIT;
76 	if (lsa->lsa_flags & LINUX_SA_SIGINFO)
77 		bsa->sa_flags |= SA_SIGINFO;
78 	if (lsa->lsa_flags & LINUX_SA_ONSTACK)
79 		bsa->sa_flags |= SA_ONSTACK;
80 	if (lsa->lsa_flags & LINUX_SA_RESTART)
81 		bsa->sa_flags |= SA_RESTART;
82 	if (lsa->lsa_flags & LINUX_SA_ONESHOT)
83 		bsa->sa_flags |= SA_RESETHAND;
84 	if (lsa->lsa_flags & LINUX_SA_NOMASK)
85 		bsa->sa_flags |= SA_NODEFER;
86 }
87 
88 static void
89 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
90 {
91 
92 	bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
93 #ifdef COMPAT_LINUX32
94 	lsa->lsa_handler = (uintptr_t)bsa->sa_handler;
95 #else
96 	lsa->lsa_handler = bsa->sa_handler;
97 #endif
98 	lsa->lsa_restorer = 0;		/* unsupported */
99 	lsa->lsa_flags = 0;
100 	if (bsa->sa_flags & SA_NOCLDSTOP)
101 		lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
102 	if (bsa->sa_flags & SA_NOCLDWAIT)
103 		lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
104 	if (bsa->sa_flags & SA_SIGINFO)
105 		lsa->lsa_flags |= LINUX_SA_SIGINFO;
106 	if (bsa->sa_flags & SA_ONSTACK)
107 		lsa->lsa_flags |= LINUX_SA_ONSTACK;
108 	if (bsa->sa_flags & SA_RESTART)
109 		lsa->lsa_flags |= LINUX_SA_RESTART;
110 	if (bsa->sa_flags & SA_RESETHAND)
111 		lsa->lsa_flags |= LINUX_SA_ONESHOT;
112 	if (bsa->sa_flags & SA_NODEFER)
113 		lsa->lsa_flags |= LINUX_SA_NOMASK;
114 }
115 
116 int
117 linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
118 		   l_sigaction_t *linux_osa)
119 {
120 	struct sigaction act, oact, *nsa, *osa;
121 	int error, sig;
122 
123 	if (!LINUX_SIG_VALID(linux_sig))
124 		return (EINVAL);
125 
126 	osa = (linux_osa != NULL) ? &oact : NULL;
127 	if (linux_nsa != NULL) {
128 		nsa = &act;
129 		linux_to_bsd_sigaction(linux_nsa, nsa);
130 	} else
131 		nsa = NULL;
132 	sig = linux_to_bsd_signal(linux_sig);
133 
134 	error = kern_sigaction(td, sig, nsa, osa, 0);
135 	if (error)
136 		return (error);
137 
138 	if (linux_osa != NULL)
139 		bsd_to_linux_sigaction(osa, linux_osa);
140 
141 	return (0);
142 }
143 
144 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
145 int
146 linux_signal(struct thread *td, struct linux_signal_args *args)
147 {
148 	l_sigaction_t nsa, osa;
149 	int error;
150 
151 #ifdef DEBUG
152 	if (ldebug(signal))
153 		printf(ARGS(signal, "%d, %p"),
154 		    args->sig, (void *)(uintptr_t)args->handler);
155 #endif
156 
157 	nsa.lsa_handler = args->handler;
158 	nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
159 	LINUX_SIGEMPTYSET(nsa.lsa_mask);
160 
161 	error = linux_do_sigaction(td, args->sig, &nsa, &osa);
162 	td->td_retval[0] = (int)(intptr_t)osa.lsa_handler;
163 
164 	return (error);
165 }
166 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
167 
168 int
169 linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
170 {
171 	l_sigaction_t nsa, osa;
172 	int error;
173 
174 #ifdef DEBUG
175 	if (ldebug(rt_sigaction))
176 		printf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
177 		    (long)args->sig, (void *)args->act,
178 		    (void *)args->oact, (long)args->sigsetsize);
179 #endif
180 
181 	if (args->sigsetsize != sizeof(l_sigset_t))
182 		return (EINVAL);
183 
184 	if (args->act != NULL) {
185 		error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
186 		if (error)
187 			return (error);
188 	}
189 
190 	error = linux_do_sigaction(td, args->sig,
191 				   args->act ? &nsa : NULL,
192 				   args->oact ? &osa : NULL);
193 
194 	if (args->oact != NULL && !error) {
195 		error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
196 	}
197 
198 	return (error);
199 }
200 
201 static int
202 linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
203 		     l_sigset_t *old)
204 {
205 	sigset_t omask, nmask;
206 	sigset_t *nmaskp;
207 	int error;
208 
209 	td->td_retval[0] = 0;
210 
211 	switch (how) {
212 	case LINUX_SIG_BLOCK:
213 		how = SIG_BLOCK;
214 		break;
215 	case LINUX_SIG_UNBLOCK:
216 		how = SIG_UNBLOCK;
217 		break;
218 	case LINUX_SIG_SETMASK:
219 		how = SIG_SETMASK;
220 		break;
221 	default:
222 		return (EINVAL);
223 	}
224 	if (new != NULL) {
225 		linux_to_bsd_sigset(new, &nmask);
226 		nmaskp = &nmask;
227 	} else
228 		nmaskp = NULL;
229 	error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
230 	if (error == 0 && old != NULL)
231 		bsd_to_linux_sigset(&omask, old);
232 
233 	return (error);
234 }
235 
236 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
237 int
238 linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
239 {
240 	l_osigset_t mask;
241 	l_sigset_t set, oset;
242 	int error;
243 
244 #ifdef DEBUG
245 	if (ldebug(sigprocmask))
246 		printf(ARGS(sigprocmask, "%d, *, *"), args->how);
247 #endif
248 
249 	if (args->mask != NULL) {
250 		error = copyin(args->mask, &mask, sizeof(l_osigset_t));
251 		if (error)
252 			return (error);
253 		LINUX_SIGEMPTYSET(set);
254 		set.__mask = mask;
255 	}
256 
257 	error = linux_do_sigprocmask(td, args->how,
258 				     args->mask ? &set : NULL,
259 				     args->omask ? &oset : NULL);
260 
261 	if (args->omask != NULL && !error) {
262 		mask = oset.__mask;
263 		error = copyout(&mask, args->omask, sizeof(l_osigset_t));
264 	}
265 
266 	return (error);
267 }
268 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
269 
270 int
271 linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
272 {
273 	l_sigset_t set, oset;
274 	int error;
275 
276 #ifdef DEBUG
277 	if (ldebug(rt_sigprocmask))
278 		printf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
279 		    args->how, (void *)args->mask,
280 		    (void *)args->omask, (long)args->sigsetsize);
281 #endif
282 
283 	if (args->sigsetsize != sizeof(l_sigset_t))
284 		return EINVAL;
285 
286 	if (args->mask != NULL) {
287 		error = copyin(args->mask, &set, sizeof(l_sigset_t));
288 		if (error)
289 			return (error);
290 	}
291 
292 	error = linux_do_sigprocmask(td, args->how,
293 				     args->mask ? &set : NULL,
294 				     args->omask ? &oset : NULL);
295 
296 	if (args->omask != NULL && !error) {
297 		error = copyout(&oset, args->omask, sizeof(l_sigset_t));
298 	}
299 
300 	return (error);
301 }
302 
303 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
304 int
305 linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
306 {
307 	struct proc *p = td->td_proc;
308 	l_sigset_t mask;
309 
310 #ifdef DEBUG
311 	if (ldebug(sgetmask))
312 		printf(ARGS(sgetmask, ""));
313 #endif
314 
315 	PROC_LOCK(p);
316 	bsd_to_linux_sigset(&td->td_sigmask, &mask);
317 	PROC_UNLOCK(p);
318 	td->td_retval[0] = mask.__mask;
319 	return (0);
320 }
321 
322 int
323 linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
324 {
325 	struct proc *p = td->td_proc;
326 	l_sigset_t lset;
327 	sigset_t bset;
328 
329 #ifdef DEBUG
330 	if (ldebug(ssetmask))
331 		printf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
332 #endif
333 
334 	PROC_LOCK(p);
335 	bsd_to_linux_sigset(&td->td_sigmask, &lset);
336 	td->td_retval[0] = lset.__mask;
337 	LINUX_SIGEMPTYSET(lset);
338 	lset.__mask = args->mask;
339 	linux_to_bsd_sigset(&lset, &bset);
340 	td->td_sigmask = bset;
341 	SIG_CANTMASK(td->td_sigmask);
342 	signotify(td);
343 	PROC_UNLOCK(p);
344 	return (0);
345 }
346 
347 int
348 linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
349 {
350 	struct proc *p = td->td_proc;
351 	sigset_t bset;
352 	l_sigset_t lset;
353 	l_osigset_t mask;
354 
355 #ifdef DEBUG
356 	if (ldebug(sigpending))
357 		printf(ARGS(sigpending, "*"));
358 #endif
359 
360 	PROC_LOCK(p);
361 	bset = p->p_siglist;
362 	SIGSETOR(bset, td->td_siglist);
363 	SIGSETAND(bset, td->td_sigmask);
364 	PROC_UNLOCK(p);
365 	bsd_to_linux_sigset(&bset, &lset);
366 	mask = lset.__mask;
367 	return (copyout(&mask, args->mask, sizeof(mask)));
368 }
369 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
370 
371 /*
372  * MPSAFE
373  */
374 int
375 linux_rt_sigpending(struct thread *td, struct linux_rt_sigpending_args *args)
376 {
377 	struct proc *p = td->td_proc;
378 	sigset_t bset;
379 	l_sigset_t lset;
380 
381 	if (args->sigsetsize > sizeof(lset))
382 		return EINVAL;
383 		/* NOT REACHED */
384 
385 #ifdef DEBUG
386 	if (ldebug(rt_sigpending))
387 		printf(ARGS(rt_sigpending, "*"));
388 #endif
389 
390 	PROC_LOCK(p);
391 	bset = p->p_siglist;
392 	SIGSETOR(bset, td->td_siglist);
393 	SIGSETAND(bset, td->td_sigmask);
394 	PROC_UNLOCK(p);
395 	bsd_to_linux_sigset(&bset, &lset);
396 	return (copyout(&lset, args->set, args->sigsetsize));
397 }
398 
399 /*
400  * MPSAFE
401  */
402 int
403 linux_rt_sigtimedwait(struct thread *td,
404 	struct linux_rt_sigtimedwait_args *args)
405 {
406 	int error, sig;
407 	l_timeval ltv;
408 	struct timeval tv;
409 	struct timespec ts, *tsa;
410 	l_sigset_t lset;
411 	sigset_t bset;
412 	l_siginfo_t linfo;
413 	ksiginfo_t info;
414 
415 #ifdef DEBUG
416 	if (ldebug(rt_sigtimedwait))
417 		printf(ARGS(rt_sigtimedwait, "*"));
418 #endif
419 	if (args->sigsetsize != sizeof(l_sigset_t))
420 		return (EINVAL);
421 
422 	if ((error = copyin(args->mask, &lset, sizeof(lset))))
423 		return (error);
424 	linux_to_bsd_sigset(&lset, &bset);
425 
426 	tsa = NULL;
427 	if (args->timeout) {
428 		if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
429 			return (error);
430 #ifdef DEBUG
431 		if (ldebug(rt_sigtimedwait))
432 			printf(LMSG("linux_rt_sigtimedwait: "
433 			    "incoming timeout (%jd/%jd)\n"),
434 			    (intmax_t)ltv.tv_sec, (intmax_t)ltv.tv_usec);
435 #endif
436 		tv.tv_sec = (long)ltv.tv_sec;
437 		tv.tv_usec = (suseconds_t)ltv.tv_usec;
438 		if (itimerfix(&tv)) {
439 			/*
440 			 * The timeout was invalid. Convert it to something
441 			 * valid that will act as it does under Linux.
442 			 */
443 			tv.tv_sec += tv.tv_usec / 1000000;
444 			tv.tv_usec %= 1000000;
445 			if (tv.tv_usec < 0) {
446 				tv.tv_sec -= 1;
447 				tv.tv_usec += 1000000;
448 			}
449 			if (tv.tv_sec < 0)
450 				timevalclear(&tv);
451 #ifdef DEBUG
452 			if (ldebug(rt_sigtimedwait))
453 				printf(LMSG("linux_rt_sigtimedwait: "
454 				    "converted timeout (%jd/%ld)\n"),
455 				    (intmax_t)tv.tv_sec, tv.tv_usec);
456 #endif
457 		}
458 		TIMEVAL_TO_TIMESPEC(&tv, &ts);
459 		tsa = &ts;
460 	}
461 	error = kern_sigtimedwait(td, bset, &info, tsa);
462 #ifdef DEBUG
463 	if (ldebug(rt_sigtimedwait))
464 		printf(LMSG("linux_rt_sigtimedwait: "
465 		    "sigtimedwait returning (%d)\n"), error);
466 #endif
467 	if (error)
468 		return (error);
469 
470 	sig = bsd_to_linux_signal(info.ksi_signo);
471 
472 	if (args->ptr) {
473 		memset(&linfo, 0, sizeof(linfo));
474 		ksiginfo_to_lsiginfo(&info, &linfo, sig);
475 		error = copyout(&linfo, args->ptr, sizeof(linfo));
476 	}
477 	if (error == 0)
478 		td->td_retval[0] = sig;
479 
480 	return (error);
481 }
482 
483 int
484 linux_kill(struct thread *td, struct linux_kill_args *args)
485 {
486 	struct kill_args /* {
487 	    int pid;
488 	    int signum;
489 	} */ tmp;
490 
491 #ifdef DEBUG
492 	if (ldebug(kill))
493 		printf(ARGS(kill, "%d, %d"), args->pid, args->signum);
494 #endif
495 
496 	/*
497 	 * Allow signal 0 as a means to check for privileges
498 	 */
499 	if (!LINUX_SIG_VALID(args->signum) && args->signum != 0)
500 		return (EINVAL);
501 
502 	if (args->signum > 0)
503 		tmp.signum = linux_to_bsd_signal(args->signum);
504 	else
505 		tmp.signum = 0;
506 
507 	tmp.pid = args->pid;
508 	return (sys_kill(td, &tmp));
509 }
510 
511 static int
512 linux_do_tkill(struct thread *td, struct thread *tdt, ksiginfo_t *ksi)
513 {
514 	struct proc *p;
515 	int error;
516 
517 	p = tdt->td_proc;
518 	AUDIT_ARG_SIGNUM(ksi->ksi_signo);
519 	AUDIT_ARG_PID(p->p_pid);
520 	AUDIT_ARG_PROCESS(p);
521 
522 	error = p_cansignal(td, p, ksi->ksi_signo);
523 	if (error != 0 || ksi->ksi_signo == 0)
524 		goto out;
525 
526 	tdksignal(tdt, ksi->ksi_signo, ksi);
527 
528 out:
529 	PROC_UNLOCK(p);
530 	return (error);
531 }
532 
533 int
534 linux_tgkill(struct thread *td, struct linux_tgkill_args *args)
535 {
536 	struct thread *tdt;
537 	ksiginfo_t ksi;
538 	int sig;
539 
540 #ifdef DEBUG
541 	if (ldebug(tgkill))
542 		printf(ARGS(tgkill, "%d, %d, %d"),
543 		    args->tgid, args->pid, args->sig);
544 #endif
545 
546 	if (args->pid <= 0 || args->tgid <=0)
547 		return (EINVAL);
548 
549 	/*
550 	 * Allow signal 0 as a means to check for privileges
551 	 */
552 	if (!LINUX_SIG_VALID(args->sig) && args->sig != 0)
553 		return (EINVAL);
554 
555 	if (args->sig > 0)
556 		sig = linux_to_bsd_signal(args->sig);
557 	else
558 		sig = 0;
559 
560 	tdt = linux_tdfind(td, args->pid, args->tgid);
561 	if (tdt == NULL)
562 		return (ESRCH);
563 
564 	ksiginfo_init(&ksi);
565 	ksi.ksi_signo = sig;
566 	ksi.ksi_code = SI_LWP;
567 	ksi.ksi_errno = 0;
568 	ksi.ksi_pid = td->td_proc->p_pid;
569 	ksi.ksi_uid = td->td_proc->p_ucred->cr_ruid;
570 	return (linux_do_tkill(td, tdt, &ksi));
571 }
572 
573 /*
574  * Deprecated since 2.5.75. Replaced by tgkill().
575  */
576 int
577 linux_tkill(struct thread *td, struct linux_tkill_args *args)
578 {
579 	struct thread *tdt;
580 	ksiginfo_t ksi;
581 	int sig;
582 
583 #ifdef DEBUG
584 	if (ldebug(tkill))
585 		printf(ARGS(tkill, "%i, %i"), args->tid, args->sig);
586 #endif
587 	if (args->tid <= 0)
588 		return (EINVAL);
589 
590 	if (!LINUX_SIG_VALID(args->sig))
591 		return (EINVAL);
592 
593 	sig = linux_to_bsd_signal(args->sig);
594 
595 	tdt = linux_tdfind(td, args->tid, -1);
596 	if (tdt == NULL)
597 		return (ESRCH);
598 
599 	ksiginfo_init(&ksi);
600 	ksi.ksi_signo = sig;
601 	ksi.ksi_code = SI_LWP;
602 	ksi.ksi_errno = 0;
603 	ksi.ksi_pid = td->td_proc->p_pid;
604 	ksi.ksi_uid = td->td_proc->p_ucred->cr_ruid;
605 	return (linux_do_tkill(td, tdt, &ksi));
606 }
607 
608 void
609 ksiginfo_to_lsiginfo(const ksiginfo_t *ksi, l_siginfo_t *lsi, l_int sig)
610 {
611 
612 	siginfo_to_lsiginfo(&ksi->ksi_info, lsi, sig);
613 }
614 
615 static void
616 sicode_to_lsicode(int si_code, int *lsi_code)
617 {
618 
619 	switch (si_code) {
620 	case SI_USER:
621 		*lsi_code = LINUX_SI_USER;
622 		break;
623 	case SI_KERNEL:
624 		*lsi_code = LINUX_SI_KERNEL;
625 		break;
626 	case SI_QUEUE:
627 		*lsi_code = LINUX_SI_QUEUE;
628 		break;
629 	case SI_TIMER:
630 		*lsi_code = LINUX_SI_TIMER;
631 		break;
632 	case SI_MESGQ:
633 		*lsi_code = LINUX_SI_MESGQ;
634 		break;
635 	case SI_ASYNCIO:
636 		*lsi_code = LINUX_SI_ASYNCIO;
637 		break;
638 	case SI_LWP:
639 		*lsi_code = LINUX_SI_TKILL;
640 		break;
641 	default:
642 		*lsi_code = si_code;
643 		break;
644 	}
645 }
646 
647 void
648 siginfo_to_lsiginfo(const siginfo_t *si, l_siginfo_t *lsi, l_int sig)
649 {
650 
651 	/* sig alredy converted */
652 	lsi->lsi_signo = sig;
653 	sicode_to_lsicode(si->si_code, &lsi->lsi_code);
654 
655 	switch (si->si_code) {
656 	case SI_LWP:
657 		lsi->lsi_pid = si->si_pid;
658 		lsi->lsi_uid = si->si_uid;
659 		break;
660 
661 	case SI_TIMER:
662 		lsi->lsi_int = si->si_value.sival_int;
663 		lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
664 		lsi->lsi_tid = si->si_timerid;
665 		break;
666 
667 	case SI_QUEUE:
668 		lsi->lsi_pid = si->si_pid;
669 		lsi->lsi_uid = si->si_uid;
670 		lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
671 		break;
672 
673 	case SI_ASYNCIO:
674 		lsi->lsi_int = si->si_value.sival_int;
675 		lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
676 		break;
677 
678 	default:
679 		switch (sig) {
680 		case LINUX_SIGPOLL:
681 			/* XXX si_fd? */
682 			lsi->lsi_band = si->si_band;
683 			break;
684 
685 		case LINUX_SIGCHLD:
686 			lsi->lsi_errno = 0;
687 			lsi->lsi_pid = si->si_pid;
688 			lsi->lsi_uid = si->si_uid;
689 
690 			if (si->si_code == CLD_STOPPED)
691 				lsi->lsi_status = bsd_to_linux_signal(si->si_status);
692 			else if (si->si_code == CLD_CONTINUED)
693 				lsi->lsi_status = bsd_to_linux_signal(SIGCONT);
694 			else
695 				lsi->lsi_status = si->si_status;
696 			break;
697 
698 		case LINUX_SIGBUS:
699 		case LINUX_SIGILL:
700 		case LINUX_SIGFPE:
701 		case LINUX_SIGSEGV:
702 			lsi->lsi_addr = PTROUT(si->si_addr);
703 			break;
704 
705 		default:
706 			lsi->lsi_pid = si->si_pid;
707 			lsi->lsi_uid = si->si_uid;
708 			if (sig >= LINUX_SIGRTMIN) {
709 				lsi->lsi_int = si->si_value.sival_int;
710 				lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
711 			}
712 			break;
713 		}
714 		break;
715 	}
716 }
717 
718 void
719 lsiginfo_to_ksiginfo(const l_siginfo_t *lsi, ksiginfo_t *ksi, int sig)
720 {
721 
722 	ksi->ksi_signo = sig;
723 	ksi->ksi_code = lsi->lsi_code;	/* XXX. Convert. */
724 	ksi->ksi_pid = lsi->lsi_pid;
725 	ksi->ksi_uid = lsi->lsi_uid;
726 	ksi->ksi_status = lsi->lsi_status;
727 	ksi->ksi_addr = PTRIN(lsi->lsi_addr);
728 	ksi->ksi_info.si_value.sival_int = lsi->lsi_int;
729 }
730 
731 int
732 linux_rt_sigqueueinfo(struct thread *td, struct linux_rt_sigqueueinfo_args *args)
733 {
734 	l_siginfo_t linfo;
735 	struct proc *p;
736 	ksiginfo_t ksi;
737 	int error;
738 	int sig;
739 
740 	if (!LINUX_SIG_VALID(args->sig))
741 		return (EINVAL);
742 
743 	error = copyin(args->info, &linfo, sizeof(linfo));
744 	if (error != 0)
745 		return (error);
746 
747 	if (linfo.lsi_code >= 0)
748 		return (EPERM);
749 
750 	sig = linux_to_bsd_signal(args->sig);
751 
752 	error = ESRCH;
753 	if ((p = pfind_any(args->pid)) != NULL) {
754 		error = p_cansignal(td, p, sig);
755 		if (error != 0) {
756 			PROC_UNLOCK(p);
757 			return (error);
758 		}
759 
760 		ksiginfo_init(&ksi);
761 		lsiginfo_to_ksiginfo(&linfo, &ksi, sig);
762 		error = tdsendsignal(p, NULL, sig, &ksi);
763 		PROC_UNLOCK(p);
764 	}
765 
766 	return (error);
767 }
768 
769 int
770 linux_rt_tgsigqueueinfo(struct thread *td, struct linux_rt_tgsigqueueinfo_args *args)
771 {
772 	l_siginfo_t linfo;
773 	struct thread *tds;
774 	ksiginfo_t ksi;
775 	int error;
776 	int sig;
777 
778 	if (!LINUX_SIG_VALID(args->sig))
779 		return (EINVAL);
780 
781 	error = copyin(args->uinfo, &linfo, sizeof(linfo));
782 	if (error != 0)
783 		return (error);
784 
785 	if (linfo.lsi_code >= 0)
786 		return (EPERM);
787 
788 	tds = linux_tdfind(td, args->tid, args->tgid);
789 	if (tds == NULL)
790 		return (ESRCH);
791 
792 	sig = linux_to_bsd_signal(args->sig);
793 	ksiginfo_init(&ksi);
794 	lsiginfo_to_ksiginfo(&linfo, &ksi, sig);
795 	return (linux_do_tkill(td, tds, &ksi));
796 }
797