xref: /freebsd/sys/compat/linux/linux_signal.c (revision 87c1627502a5dde91e5284118eec8682b60f27a2) 
1 /*-
2  * Copyright (c) 1994-1995 Søren 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("$FreeBSD$");
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 
57 void
58 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
59 {
60 	int b, l;
61 
62 	SIGEMPTYSET(*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)];
68 			if (b)
69 				SIGADDSET(*bss, b);
70 		}
71 	}
72 }
73 
74 void
75 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
76 {
77 	int b, l;
78 
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)];
85 			if (l)
86 				LINUX_SIGADDSET(*lss, l);
87 		}
88 	}
89 }
90 
91 static void
92 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
93 {
94 
95 	linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
96 	bsa->sa_handler = PTRIN(lsa->lsa_handler);
97 	bsa->sa_flags = 0;
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;
112 }
113 
114 static void
115 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
116 {
117 
118 	bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
119 #ifdef COMPAT_LINUX32
120 	lsa->lsa_handler = (uintptr_t)bsa->sa_handler;
121 #else
122 	lsa->lsa_handler = bsa->sa_handler;
123 #endif
124 	lsa->lsa_restorer = 0;		/* unsupported */
125 	lsa->lsa_flags = 0;
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;
140 }
141 
142 int
143 linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
144 		   l_sigaction_t *linux_osa)
145 {
146 	struct sigaction act, oact, *nsa, *osa;
147 	int error, sig;
148 
149 	if (!LINUX_SIG_VALID(linux_sig))
150 		return (EINVAL);
151 
152 	osa = (linux_osa != NULL) ? &oact : NULL;
153 	if (linux_nsa != NULL) {
154 		nsa = &act;
155 		linux_to_bsd_sigaction(linux_nsa, nsa);
156 	} else
157 		nsa = NULL;
158 
159 	if (linux_sig <= LINUX_SIGTBLSZ)
160 		sig = linux_to_bsd_signal[_SIG_IDX(linux_sig)];
161 	else
162 		sig = linux_sig;
163 
164 	error = kern_sigaction(td, sig, nsa, osa, 0);
165 	if (error)
166 		return (error);
167 
168 	if (linux_osa != NULL)
169 		bsd_to_linux_sigaction(osa, linux_osa);
170 
171 	return (0);
172 }
173 
174 
175 int
176 linux_signal(struct thread *td, struct linux_signal_args *args)
177 {
178 	l_sigaction_t nsa, osa;
179 	int error;
180 
181 #ifdef DEBUG
182 	if (ldebug(signal))
183 		printf(ARGS(signal, "%d, %p"),
184 		    args->sig, (void *)(uintptr_t)args->handler);
185 #endif
186 
187 	nsa.lsa_handler = args->handler;
188 	nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
189 	LINUX_SIGEMPTYSET(nsa.lsa_mask);
190 
191 	error = linux_do_sigaction(td, args->sig, &nsa, &osa);
192 	td->td_retval[0] = (int)(intptr_t)osa.lsa_handler;
193 
194 	return (error);
195 }
196 
197 int
198 linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
199 {
200 	l_sigaction_t nsa, osa;
201 	int error;
202 
203 #ifdef DEBUG
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);
208 #endif
209 
210 	if (args->sigsetsize != sizeof(l_sigset_t))
211 		return (EINVAL);
212 
213 	if (args->act != NULL) {
214 		error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
215 		if (error)
216 			return (error);
217 	}
218 
219 	error = linux_do_sigaction(td, args->sig,
220 				   args->act ? &nsa : NULL,
221 				   args->oact ? &osa : NULL);
222 
223 	if (args->oact != NULL && !error) {
224 		error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
225 	}
226 
227 	return (error);
228 }
229 
230 static int
231 linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
232 		     l_sigset_t *old)
233 {
234 	sigset_t omask, nmask;
235 	sigset_t *nmaskp;
236 	int error;
237 
238 	td->td_retval[0] = 0;
239 
240 	switch (how) {
241 	case LINUX_SIG_BLOCK:
242 		how = SIG_BLOCK;
243 		break;
244 	case LINUX_SIG_UNBLOCK:
245 		how = SIG_UNBLOCK;
246 		break;
247 	case LINUX_SIG_SETMASK:
248 		how = SIG_SETMASK;
249 		break;
250 	default:
251 		return (EINVAL);
252 	}
253 	if (new != NULL) {
254 		linux_to_bsd_sigset(new, &nmask);
255 		nmaskp = &nmask;
256 	} else
257 		nmaskp = NULL;
258 	error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
259 	if (error == 0 && old != NULL)
260 		bsd_to_linux_sigset(&omask, old);
261 
262 	return (error);
263 }
264 
265 int
266 linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
267 {
268 	l_osigset_t mask;
269 	l_sigset_t set, oset;
270 	int error;
271 
272 #ifdef DEBUG
273 	if (ldebug(sigprocmask))
274 		printf(ARGS(sigprocmask, "%d, *, *"), args->how);
275 #endif
276 
277 	if (args->mask != NULL) {
278 		error = copyin(args->mask, &mask, sizeof(l_osigset_t));
279 		if (error)
280 			return (error);
281 		LINUX_SIGEMPTYSET(set);
282 		set.__bits[0] = mask;
283 	}
284 
285 	error = linux_do_sigprocmask(td, args->how,
286 				     args->mask ? &set : NULL,
287 				     args->omask ? &oset : NULL);
288 
289 	if (args->omask != NULL && !error) {
290 		mask = oset.__bits[0];
291 		error = copyout(&mask, args->omask, sizeof(l_osigset_t));
292 	}
293 
294 	return (error);
295 }
296 
297 int
298 linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
299 {
300 	l_sigset_t set, oset;
301 	int error;
302 
303 #ifdef DEBUG
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);
308 #endif
309 
310 	if (args->sigsetsize != sizeof(l_sigset_t))
311 		return EINVAL;
312 
313 	if (args->mask != NULL) {
314 		error = copyin(args->mask, &set, sizeof(l_sigset_t));
315 		if (error)
316 			return (error);
317 	}
318 
319 	error = linux_do_sigprocmask(td, args->how,
320 				     args->mask ? &set : NULL,
321 				     args->omask ? &oset : NULL);
322 
323 	if (args->omask != NULL && !error) {
324 		error = copyout(&oset, args->omask, sizeof(l_sigset_t));
325 	}
326 
327 	return (error);
328 }
329 
330 int
331 linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
332 {
333 	struct proc *p = td->td_proc;
334 	l_sigset_t mask;
335 
336 #ifdef DEBUG
337 	if (ldebug(sgetmask))
338 		printf(ARGS(sgetmask, ""));
339 #endif
340 
341 	PROC_LOCK(p);
342 	bsd_to_linux_sigset(&td->td_sigmask, &mask);
343 	PROC_UNLOCK(p);
344 	td->td_retval[0] = mask.__bits[0];
345 	return (0);
346 }
347 
348 int
349 linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
350 {
351 	struct proc *p = td->td_proc;
352 	l_sigset_t lset;
353 	sigset_t bset;
354 
355 #ifdef DEBUG
356 	if (ldebug(ssetmask))
357 		printf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
358 #endif
359 
360 	PROC_LOCK(p);
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);
368 	signotify(td);
369 	PROC_UNLOCK(p);
370 	return (0);
371 }
372 
373 /*
374  * MPSAFE
375  */
376 int
377 linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
378 {
379 	struct proc *p = td->td_proc;
380 	sigset_t bset;
381 	l_sigset_t lset;
382 	l_osigset_t mask;
383 
384 #ifdef DEBUG
385 	if (ldebug(sigpending))
386 		printf(ARGS(sigpending, "*"));
387 #endif
388 
389 	PROC_LOCK(p);
390 	bset = p->p_siglist;
391 	SIGSETOR(bset, td->td_siglist);
392 	SIGSETAND(bset, td->td_sigmask);
393 	PROC_UNLOCK(p);
394 	bsd_to_linux_sigset(&bset, &lset);
395 	mask = lset.__bits[0];
396 	return (copyout(&mask, args->mask, sizeof(mask)));
397 }
398 
399 /*
400  * MPSAFE
401  */
402 int
403 linux_rt_sigpending(struct thread *td, struct linux_rt_sigpending_args *args)
404 {
405 	struct proc *p = td->td_proc;
406 	sigset_t bset;
407 	l_sigset_t lset;
408 
409 	if (args->sigsetsize > sizeof(lset))
410 		return EINVAL;
411 		/* NOT REACHED */
412 
413 #ifdef DEBUG
414 	if (ldebug(rt_sigpending))
415 		printf(ARGS(rt_sigpending, "*"));
416 #endif
417 
418 	PROC_LOCK(p);
419 	bset = p->p_siglist;
420 	SIGSETOR(bset, td->td_siglist);
421 	SIGSETAND(bset, td->td_sigmask);
422 	PROC_UNLOCK(p);
423 	bsd_to_linux_sigset(&bset, &lset);
424 	return (copyout(&lset, args->set, args->sigsetsize));
425 }
426 
427 /*
428  * MPSAFE
429  */
430 int
431 linux_rt_sigtimedwait(struct thread *td,
432 	struct linux_rt_sigtimedwait_args *args)
433 {
434 	int error, sig;
435 	l_timeval ltv;
436 	struct timeval tv;
437 	struct timespec ts, *tsa;
438 	l_sigset_t lset;
439 	sigset_t bset;
440 	l_siginfo_t linfo;
441 	ksiginfo_t info;
442 
443 #ifdef DEBUG
444 	if (ldebug(rt_sigtimedwait))
445 		printf(ARGS(rt_sigtimedwait, "*"));
446 #endif
447 	if (args->sigsetsize != sizeof(l_sigset_t))
448 		return (EINVAL);
449 
450 	if ((error = copyin(args->mask, &lset, sizeof(lset))))
451 		return (error);
452 	linux_to_bsd_sigset(&lset, &bset);
453 
454 	tsa = NULL;
455 	if (args->timeout) {
456 		if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
457 			return (error);
458 #ifdef DEBUG
459 		if (ldebug(rt_sigtimedwait))
460 			printf(LMSG("linux_rt_sigtimedwait: "
461 			    "incoming timeout (%d/%d)\n"),
462 			    ltv.tv_sec, ltv.tv_usec);
463 #endif
464 		tv.tv_sec = (long)ltv.tv_sec;
465 		tv.tv_usec = (suseconds_t)ltv.tv_usec;
466 		if (itimerfix(&tv)) {
467 			/*
468 			 * The timeout was invalid. Convert it to something
469 			 * valid that will act as it does under Linux.
470 			 */
471 			tv.tv_sec += tv.tv_usec / 1000000;
472 			tv.tv_usec %= 1000000;
473 			if (tv.tv_usec < 0) {
474 				tv.tv_sec -= 1;
475 				tv.tv_usec += 1000000;
476 			}
477 			if (tv.tv_sec < 0)
478 				timevalclear(&tv);
479 #ifdef DEBUG
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);
484 #endif
485 		}
486 		TIMEVAL_TO_TIMESPEC(&tv, &ts);
487 		tsa = &ts;
488 	}
489 	error = kern_sigtimedwait(td, bset, &info, tsa);
490 #ifdef DEBUG
491 	if (ldebug(rt_sigtimedwait))
492 		printf(LMSG("linux_rt_sigtimedwait: "
493 		    "sigtimedwait returning (%d)\n"), error);
494 #endif
495 	if (error)
496 		return (error);
497 
498 	sig = BSD_TO_LINUX_SIGNAL(info.ksi_signo);
499 
500 	if (args->ptr) {
501 		memset(&linfo, 0, sizeof(linfo));
502 		ksiginfo_to_lsiginfo(&info, &linfo, sig);
503 		error = copyout(&linfo, args->ptr, sizeof(linfo));
504 	}
505 	if (error == 0)
506 		td->td_retval[0] = sig;
507 
508 	return (error);
509 }
510 
511 int
512 linux_kill(struct thread *td, struct linux_kill_args *args)
513 {
514 	struct kill_args /* {
515 	    int pid;
516 	    int signum;
517 	} */ tmp;
518 
519 #ifdef DEBUG
520 	if (ldebug(kill))
521 		printf(ARGS(kill, "%d, %d"), args->pid, args->signum);
522 #endif
523 
524 	/*
525 	 * Allow signal 0 as a means to check for privileges
526 	 */
527 	if (!LINUX_SIG_VALID(args->signum) && args->signum != 0)
528 		return (EINVAL);
529 
530 	if (args->signum > 0 && args->signum <= LINUX_SIGTBLSZ)
531 		tmp.signum = linux_to_bsd_signal[_SIG_IDX(args->signum)];
532 	else
533 		tmp.signum = args->signum;
534 
535 	tmp.pid = args->pid;
536 	return (sys_kill(td, &tmp));
537 }
538 
539 static int
540 linux_do_tkill(struct thread *td, l_int tgid, l_int pid, l_int signum)
541 {
542 	struct proc *proc = td->td_proc;
543 	struct linux_emuldata *em;
544 	struct proc *p;
545 	ksiginfo_t ksi;
546 	int error;
547 
548 	AUDIT_ARG_SIGNUM(signum);
549 	AUDIT_ARG_PID(pid);
550 
551 	/*
552 	 * Allow signal 0 as a means to check for privileges
553 	 */
554 	if (!LINUX_SIG_VALID(signum) && signum != 0)
555 		return (EINVAL);
556 
557 	if (signum > 0 && signum <= LINUX_SIGTBLSZ)
558 		signum = linux_to_bsd_signal[_SIG_IDX(signum)];
559 
560 	if ((p = pfind(pid)) == NULL) {
561 		if ((p = zpfind(pid)) == NULL)
562 			return (ESRCH);
563 	}
564 
565 	AUDIT_ARG_PROCESS(p);
566 	error = p_cansignal(td, p, signum);
567 	if (error != 0 || signum == 0)
568 		goto out;
569 
570 	error = ESRCH;
571 	em = em_find(p, EMUL_DONTLOCK);
572 
573 	if (em == NULL) {
574 #ifdef DEBUG
575 		printf("emuldata not found in do_tkill.\n");
576 #endif
577 		goto out;
578 	}
579 	if (tgid > 0 && em->shared->group_pid != tgid)
580 		goto out;
581 
582 	ksiginfo_init(&ksi);
583 	ksi.ksi_signo = signum;
584 	ksi.ksi_code = LINUX_SI_TKILL;
585 	ksi.ksi_errno = 0;
586 	ksi.ksi_pid = proc->p_pid;
587 	ksi.ksi_uid = proc->p_ucred->cr_ruid;
588 
589 	error = pksignal(p, ksi.ksi_signo, &ksi);
590 
591 out:
592 	PROC_UNLOCK(p);
593 	return (error);
594 }
595 
596 int
597 linux_tgkill(struct thread *td, struct linux_tgkill_args *args)
598 {
599 
600 #ifdef DEBUG
601 	if (ldebug(tgkill))
602 		printf(ARGS(tgkill, "%d, %d, %d"), args->tgid, args->pid, args->sig);
603 #endif
604 	if (args->pid <= 0 || args->tgid <=0)
605 		return (EINVAL);
606 
607 	return (linux_do_tkill(td, args->tgid, args->pid, args->sig));
608 }
609 
610 int
611 linux_tkill(struct thread *td, struct linux_tkill_args *args)
612 {
613 #ifdef DEBUG
614 	if (ldebug(tkill))
615 		printf(ARGS(tkill, "%i, %i"), args->tid, args->sig);
616 #endif
617 	if (args->tid <= 0)
618 		return (EINVAL);
619 
620 	return (linux_do_tkill(td, 0, args->tid, args->sig));
621 }
622 
623 void
624 ksiginfo_to_lsiginfo(ksiginfo_t *ksi, l_siginfo_t *lsi, l_int sig)
625 {
626 
627 	lsi->lsi_signo = sig;
628 	lsi->lsi_code = ksi->ksi_code;
629 
630 	switch (sig) {
631 	case LINUX_SIGPOLL:
632 		/* XXX si_fd? */
633 		lsi->lsi_band = ksi->ksi_band;
634 		break;
635 	case LINUX_SIGCHLD:
636 		lsi->lsi_pid = ksi->ksi_pid;
637 		lsi->lsi_uid = ksi->ksi_uid;
638 		lsi->lsi_status = ksi->ksi_status;
639 		break;
640 	case LINUX_SIGBUS:
641 	case LINUX_SIGILL:
642 	case LINUX_SIGFPE:
643 	case LINUX_SIGSEGV:
644 		lsi->lsi_addr = PTROUT(ksi->ksi_addr);
645 		break;
646 	default:
647 		/* XXX SI_TIMER etc... */
648 		lsi->lsi_pid = ksi->ksi_pid;
649 		lsi->lsi_uid = ksi->ksi_uid;
650 		break;
651 	}
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);
655 	}
656 }
657