xref: /netbsd-src/sys/compat/netbsd32/netbsd32_signal.c (revision 946379e7b37692fc43f68eb0d1c10daa0a7f3b6c) 
1 /*	$NetBSD: netbsd32_signal.c,v 1.39 2015/06/20 19:58:40 martin Exp $	*/
2 
3 /*
4  * Copyright (c) 1998, 2001 Matthew R. Green
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  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: netbsd32_signal.c,v 1.39 2015/06/20 19:58:40 martin Exp $");
31 
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/mount.h>
35 #include <sys/stat.h>
36 #include <sys/time.h>
37 #include <sys/signalvar.h>
38 #include <sys/proc.h>
39 #include <sys/wait.h>
40 #include <sys/dirent.h>
41 
42 #include <uvm/uvm_extern.h>
43 
44 #include <compat/netbsd32/netbsd32.h>
45 #include <compat/netbsd32/netbsd32_conv.h>
46 #include <compat/netbsd32/netbsd32_syscallargs.h>
47 
48 #include <compat/sys/signal.h>
49 #include <compat/sys/signalvar.h>
50 #include <compat/sys/siginfo.h>
51 #include <compat/sys/ucontext.h>
52 #include <compat/common/compat_sigaltstack.h>
53 
54 
55 int
56 netbsd32_sigaction(struct lwp *l, const struct netbsd32_sigaction_args *uap, register_t *retval)
57 {
58 	/* {
59 		syscallarg(int) signum;
60 		syscallarg(const netbsd32_sigactionp_t) nsa;
61 		syscallarg(netbsd32_sigactionp_t) osa;
62 	} */
63 	struct sigaction nsa, osa;
64 	struct netbsd32_sigaction13 *sa32p, sa32;
65 	int error;
66 
67 	if (SCARG_P32(uap, nsa)) {
68 		sa32p = SCARG_P32(uap, nsa);
69 		if (copyin(sa32p, &sa32, sizeof(sa32)))
70 			return EFAULT;
71 		nsa.sa_handler = (void *)NETBSD32PTR64(sa32.netbsd32_sa_handler);
72 		memset(&nsa.sa_mask, 0, sizeof(nsa.sa_mask));
73 		nsa.sa_mask.__bits[0] = sa32.netbsd32_sa_mask;
74 		nsa.sa_flags = sa32.netbsd32_sa_flags;
75 	}
76 	error = sigaction1(l, SCARG(uap, signum),
77 			   SCARG_P32(uap, nsa) ? &nsa : 0,
78 			   SCARG_P32(uap, osa) ? &osa : 0,
79 			   NULL, 0);
80 
81 	if (error)
82 		return (error);
83 
84 	if (SCARG_P32(uap, osa)) {
85 		NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
86 		sa32.netbsd32_sa_mask = osa.sa_mask.__bits[0];
87 		sa32.netbsd32_sa_flags = osa.sa_flags;
88 		sa32p = SCARG_P32(uap, osa);
89 		if (copyout(&sa32, sa32p, sizeof(sa32)))
90 			return EFAULT;
91 	}
92 
93 	return (0);
94 }
95 
96 int
97 netbsd32___sigaltstack14(struct lwp *l, const struct netbsd32___sigaltstack14_args *uap, register_t *retval)
98 {
99 	/* {
100 		syscallarg(const netbsd32_sigaltstackp_t) nss;
101 		syscallarg(netbsd32_sigaltstackp_t) oss;
102 	} */
103 	compat_sigaltstack(uap, netbsd32_sigaltstack, SS_ONSTACK, SS_DISABLE);
104 }
105 
106 /* ARGSUSED */
107 int
108 netbsd32___sigaction14(struct lwp *l, const struct netbsd32___sigaction14_args *uap, register_t *retval)
109 {
110 	/* {
111 		syscallarg(int) signum;
112 		syscallarg(const struct sigaction *) nsa;
113 		syscallarg(struct sigaction *) osa;
114 	} */
115 	struct netbsd32_sigaction sa32;
116 	struct sigaction nsa, osa;
117 	int error;
118 
119 	if (SCARG_P32(uap, nsa)) {
120 		error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
121 		if (error)
122 			return (error);
123 		nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
124 		nsa.sa_mask = sa32.netbsd32_sa_mask;
125 		nsa.sa_flags = sa32.netbsd32_sa_flags;
126 	}
127 	error = sigaction1(l, SCARG(uap, signum),
128 		    SCARG_P32(uap, nsa) ? &nsa : 0,
129 		    SCARG_P32(uap, osa) ? &osa : 0,
130 		    NULL, 0);
131 	if (error)
132 		return (error);
133 	if (SCARG_P32(uap, osa)) {
134 		NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
135 		sa32.netbsd32_sa_mask = osa.sa_mask;
136 		sa32.netbsd32_sa_flags = osa.sa_flags;
137 		error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
138 		if (error)
139 			return (error);
140 	}
141 	return (0);
142 }
143 
144 /* ARGSUSED */
145 int
146 netbsd32___sigaction_sigtramp(struct lwp *l, const struct netbsd32___sigaction_sigtramp_args *uap, register_t *retval)
147 {
148 	/* {
149 		syscallarg(int) signum;
150 		syscallarg(const netbsd32_sigactionp_t) nsa;
151 		syscallarg(netbsd32_sigactionp_t) osa;
152 		syscallarg(netbsd32_voidp) tramp;
153 		syscallarg(int) vers;
154 	} */
155 	struct netbsd32_sigaction sa32;
156 	struct sigaction nsa, osa;
157 	int error;
158 
159 	if (SCARG_P32(uap, nsa)) {
160 		error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
161 		if (error)
162 			return (error);
163 		nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
164 		nsa.sa_mask = sa32.netbsd32_sa_mask;
165 		nsa.sa_flags = sa32.netbsd32_sa_flags;
166 	}
167 	error = sigaction1(l, SCARG(uap, signum),
168 	    SCARG_P32(uap, nsa) ? &nsa : 0,
169 	    SCARG_P32(uap, osa) ? &osa : 0,
170 	    SCARG_P32(uap, tramp), SCARG(uap, vers));
171 	if (error)
172 		return (error);
173 	if (SCARG_P32(uap, osa)) {
174 		NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
175 		sa32.netbsd32_sa_mask = osa.sa_mask;
176 		sa32.netbsd32_sa_flags = osa.sa_flags;
177 		error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
178 		if (error)
179 			return (error);
180 	}
181 	return (0);
182 }
183 
184 void
185 netbsd32_ksi32_to_ksi(struct _ksiginfo *si, const struct __ksiginfo32 *si32)
186 {
187 	memset(si, 0, sizeof (*si));
188 	si->_signo = si32->_signo;
189 	si->_code = si32->_code;
190 	si->_errno = si32->_errno;
191 
192 	switch (si32->_signo) {
193 	case SIGILL:
194 	case SIGBUS:
195 	case SIGSEGV:
196 	case SIGFPE:
197 	case SIGTRAP:
198 		si->_reason._fault._addr = NETBSD32IPTR64(si32->_reason._fault._addr);
199 		si->_reason._fault._trap = si32->_reason._fault._trap;
200 		break;
201 	case SIGALRM:
202 	case SIGVTALRM:
203 	case SIGPROF:
204 	default:	/* see sigqueue() and kill1() */
205 		si->_reason._rt._pid = si32->_reason._rt._pid;
206 		si->_reason._rt._uid = si32->_reason._rt._uid;
207 		si->_reason._rt._value.sival_int = si32->_reason._rt._value.sival_int;
208 		break;
209 	case SIGCHLD:
210 		si->_reason._child._pid = si32->_reason._child._pid;
211 		si->_reason._child._uid = si32->_reason._child._uid;
212 		si->_reason._child._utime = si32->_reason._child._utime;
213 		si->_reason._child._stime = si32->_reason._child._stime;
214 		break;
215 	case SIGURG:
216 	case SIGIO:
217 		si->_reason._poll._band = si32->_reason._poll._band;
218 		si->_reason._poll._fd = si32->_reason._poll._fd;
219 		break;
220 	}
221 }
222 
223 void
224 netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si)
225 {
226 	memset(si32, 0, sizeof (*si32));
227 	si32->si_signo = si->si_signo;
228 	si32->si_code = si->si_code;
229 	si32->si_errno = si->si_errno;
230 
231 	switch (si32->si_signo) {
232 	case 0:	/* SA */
233 		si32->si_value.sival_int = si->si_value.sival_int;
234 		break;
235 	case SIGILL:
236 	case SIGBUS:
237 	case SIGSEGV:
238 	case SIGFPE:
239 	case SIGTRAP:
240 		si32->si_addr = (uint32_t)(uintptr_t)si->si_addr;
241 		si32->si_trap = si->si_trap;
242 		break;
243 	case SIGALRM:
244 	case SIGVTALRM:
245 	case SIGPROF:
246 	default:
247 		si32->si_pid = si->si_pid;
248 		si32->si_uid = si->si_uid;
249 		si32->si_value.sival_int = si->si_value.sival_int;
250 		break;
251 	case SIGCHLD:
252 		si32->si_pid = si->si_pid;
253 		si32->si_uid = si->si_uid;
254 		si32->si_status = si->si_status;
255 		si32->si_utime = si->si_utime;
256 		si32->si_stime = si->si_stime;
257 		break;
258 	case SIGURG:
259 	case SIGIO:
260 		si32->si_band = si->si_band;
261 		si32->si_fd = si->si_fd;
262 		break;
263 	}
264 }
265 
266 void
267 getucontext32(struct lwp *l, ucontext32_t *ucp)
268 {
269 	struct proc *p = l->l_proc;
270 
271 	KASSERT(mutex_owned(p->p_lock));
272 
273 	ucp->uc_flags = 0;
274 	ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;
275 	ucp->uc_sigmask = l->l_sigmask;
276 	ucp->uc_flags |= _UC_SIGMASK;
277 
278 	/*
279 	 * The (unsupplied) definition of the `current execution stack'
280 	 * in the System V Interface Definition appears to allow returning
281 	 * the main context stack.
282 	 */
283 	if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) {
284 		ucp->uc_stack.ss_sp = USRSTACK32;
285 		ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize);
286 		ucp->uc_stack.ss_flags = 0;	/* XXX, def. is Very Fishy */
287 	} else {
288 		/* Simply copy alternate signal execution stack. */
289 		ucp->uc_stack.ss_sp =
290 		    (uint32_t)(intptr_t)l->l_sigstk.ss_sp;
291 		ucp->uc_stack.ss_size = l->l_sigstk.ss_size;
292 		ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags;
293 	}
294 	ucp->uc_flags |= _UC_STACK;
295 	mutex_exit(p->p_lock);
296 	cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
297 	mutex_enter(p->p_lock);
298 }
299 
300 int
301 netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval)
302 {
303 	/* {
304 		syscallarg(netbsd32_ucontextp) ucp;
305 	} */
306 	struct proc *p = l->l_proc;
307 	ucontext32_t uc;
308 
309 	memset(&uc, 0, sizeof(uc));
310 
311 	mutex_enter(p->p_lock);
312 	getucontext32(l, &uc);
313 	mutex_exit(p->p_lock);
314 
315 	return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t));
316 }
317 
318 int
319 setucontext32(struct lwp *l, const ucontext32_t *ucp)
320 {
321 	struct proc *p = l->l_proc;
322 	int error;
323 
324 	KASSERT(mutex_owned(p->p_lock));
325 
326 	if ((ucp->uc_flags & _UC_SIGMASK) != 0) {
327 		error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL);
328 		if (error != 0)
329 			return error;
330 	}
331 
332 	mutex_exit(p->p_lock);
333 	error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags);
334 	mutex_enter(p->p_lock);
335 	if (error != 0)
336 		return (error);
337 
338 	l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;
339 
340 	/*
341 	 * If there was stack information, update whether or not we are
342 	 * still running on an alternate signal stack.
343 	 */
344 	if ((ucp->uc_flags & _UC_STACK) != 0) {
345 		if (ucp->uc_stack.ss_flags & SS_ONSTACK)
346 			l->l_sigstk.ss_flags |= SS_ONSTACK;
347 		else
348 			l->l_sigstk.ss_flags &= ~SS_ONSTACK;
349 	}
350 
351 	return 0;
352 }
353 
354 /* ARGSUSED */
355 int
356 netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval)
357 {
358 	/* {
359 		syscallarg(netbsd32_ucontextp) ucp;
360 	} */
361 	ucontext32_t uc;
362 	int error;
363 	struct proc *p = l->l_proc;
364 
365 	error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc));
366 	if (error)
367 		return (error);
368 	if (!(uc.uc_flags & _UC_CPU))
369 		return (EINVAL);
370 	mutex_enter(p->p_lock);
371 	error = setucontext32(l, &uc);
372 	mutex_exit(p->p_lock);
373 	if (error)
374 		return (error);
375 
376 	return (EJUSTRETURN);
377 }
378 
379 static int
380 netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size)
381 {
382 	const siginfo_t *info = src;
383 	siginfo32_t info32;
384 
385 	netbsd32_si_to_si32(&info32, info);
386 
387 	return copyout(&info32, dst, sizeof(info32));
388 }
389 
390 static int
391 netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size)
392 {
393 	struct timespec *ts = dst;
394 	struct netbsd32_timespec ts32;
395 	int error;
396 
397 	error = copyin(src, &ts32, sizeof(ts32));
398 	if (error)
399 		return error;
400 
401 	netbsd32_to_timespec(&ts32, ts);
402 	return 0;
403 }
404 
405 static int
406 netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size)
407 {
408 	const struct timespec *ts = src;
409 	struct netbsd32_timespec ts32;
410 
411 	netbsd32_from_timespec(ts, &ts32);
412 
413 	return copyout(&ts32, dst, sizeof(ts32));
414 }
415 
416 int
417 netbsd32_____sigtimedwait50(struct lwp *l, const struct netbsd32_____sigtimedwait50_args *uap, register_t *retval)
418 {
419 	/* {
420 		syscallarg(netbsd32_sigsetp_t) set;
421 		syscallarg(netbsd32_siginfop_t) info;
422 		syscallarg(netbsd32_timespec50p_t) timeout;
423 	} */
424 	struct sys_____sigtimedwait50_args ua;
425 
426 	NETBSD32TOP_UAP(set, const sigset_t);
427 	NETBSD32TOP_UAP(info, siginfo_t);
428 	NETBSD32TOP_UAP(timeout, struct timespec);
429 
430 	return sigtimedwait1(l, &ua, retval,
431 	    copyin,
432 	    netbsd32_sigtimedwait_put_info,
433 	    netbsd32_sigtimedwait_fetch_timeout,
434 	    netbsd32_sigtimedwait_put_timeout);
435 }
436 
437 int
438 netbsd32_sigqueueinfo(struct lwp *l,
439     const struct netbsd32_sigqueueinfo_args *uap, register_t *retval)
440 {
441 	/* {
442 		syscallarg(pid_t) pid;
443 		syscallarg(const netbsd32_siginfop_t) info;
444 	} */
445 	struct __ksiginfo32 ksi32;
446 	ksiginfo_t ksi;
447 	int error;
448 
449 	if ((error = copyin(SCARG_P32(uap, info), &ksi32,
450 	    sizeof(ksi32))) != 0)
451 		return error;
452 
453 	KSI_INIT(&ksi);
454 	netbsd32_ksi32_to_ksi(&ksi.ksi_info, &ksi32);
455 
456 	return kill1(l, SCARG(uap, pid), &ksi, retval);
457 }
458