xref: /netbsd-src/sys/compat/netbsd32/netbsd32_signal.c (revision a536ee5124e62c9a0051a252f7833dc8f50f44c9)
1 /*	$NetBSD: netbsd32_signal.c,v 1.37 2012/02/19 21:06:41 rmind 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 1.37 2012/02/19 21:06:41 rmind 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 #ifdef unused
55 static void netbsd32_si32_to_si(siginfo_t *, const siginfo32_t *);
56 #endif
57 
58 
59 int
60 netbsd32_sigaction(struct lwp *l, const struct netbsd32_sigaction_args *uap, register_t *retval)
61 {
62 	/* {
63 		syscallarg(int) signum;
64 		syscallarg(const netbsd32_sigactionp_t) nsa;
65 		syscallarg(netbsd32_sigactionp_t) osa;
66 	} */
67 	struct sigaction nsa, osa;
68 	struct netbsd32_sigaction *sa32p, sa32;
69 	int error;
70 
71 	if (SCARG_P32(uap, nsa)) {
72 		sa32p = SCARG_P32(uap, nsa);
73 		if (copyin(sa32p, &sa32, sizeof(sa32)))
74 			return EFAULT;
75 		nsa.sa_handler = (void *)NETBSD32PTR64(sa32.netbsd32_sa_handler);
76 		nsa.sa_mask = sa32.netbsd32_sa_mask;
77 		nsa.sa_flags = sa32.netbsd32_sa_flags;
78 	}
79 	error = sigaction1(l, SCARG(uap, signum),
80 			   SCARG_P32(uap, nsa) ? &nsa : 0,
81 			   SCARG_P32(uap, osa) ? &osa : 0,
82 			   NULL, 0);
83 
84 	if (error)
85 		return (error);
86 
87 	if (SCARG_P32(uap, osa)) {
88 		NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
89 		sa32.netbsd32_sa_mask = osa.sa_mask;
90 		sa32.netbsd32_sa_flags = osa.sa_flags;
91 		sa32p = SCARG_P32(uap, osa);
92 		if (copyout(&sa32, sa32p, sizeof(sa32)))
93 			return EFAULT;
94 	}
95 
96 	return (0);
97 }
98 
99 int
100 netbsd32___sigaltstack14(struct lwp *l, const struct netbsd32___sigaltstack14_args *uap, register_t *retval)
101 {
102 	/* {
103 		syscallarg(const netbsd32_sigaltstackp_t) nss;
104 		syscallarg(netbsd32_sigaltstackp_t) oss;
105 	} */
106 	compat_sigaltstack(uap, netbsd32_sigaltstack, SS_ONSTACK, SS_DISABLE);
107 }
108 
109 /* ARGSUSED */
110 int
111 netbsd32___sigaction14(struct lwp *l, const struct netbsd32___sigaction14_args *uap, register_t *retval)
112 {
113 	/* {
114 		syscallarg(int) signum;
115 		syscallarg(const struct sigaction *) nsa;
116 		syscallarg(struct sigaction *) osa;
117 	} */
118 	struct netbsd32_sigaction sa32;
119 	struct sigaction nsa, osa;
120 	int error;
121 
122 	if (SCARG_P32(uap, nsa)) {
123 		error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
124 		if (error)
125 			return (error);
126 		nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
127 		nsa.sa_mask = sa32.netbsd32_sa_mask;
128 		nsa.sa_flags = sa32.netbsd32_sa_flags;
129 	}
130 	error = sigaction1(l, SCARG(uap, signum),
131 		    SCARG_P32(uap, nsa) ? &nsa : 0,
132 		    SCARG_P32(uap, osa) ? &osa : 0,
133 		    NULL, 0);
134 	if (error)
135 		return (error);
136 	if (SCARG_P32(uap, osa)) {
137 		NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
138 		sa32.netbsd32_sa_mask = osa.sa_mask;
139 		sa32.netbsd32_sa_flags = osa.sa_flags;
140 		error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
141 		if (error)
142 			return (error);
143 	}
144 	return (0);
145 }
146 
147 /* ARGSUSED */
148 int
149 netbsd32___sigaction_sigtramp(struct lwp *l, const struct netbsd32___sigaction_sigtramp_args *uap, register_t *retval)
150 {
151 	/* {
152 		syscallarg(int) signum;
153 		syscallarg(const netbsd32_sigactionp_t) nsa;
154 		syscallarg(netbsd32_sigactionp_t) osa;
155 		syscallarg(netbsd32_voidp) tramp;
156 		syscallarg(int) vers;
157 	} */
158 	struct netbsd32_sigaction sa32;
159 	struct sigaction nsa, osa;
160 	int error;
161 
162 	if (SCARG_P32(uap, nsa)) {
163 		error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
164 		if (error)
165 			return (error);
166 		nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
167 		nsa.sa_mask = sa32.netbsd32_sa_mask;
168 		nsa.sa_flags = sa32.netbsd32_sa_flags;
169 	}
170 	error = sigaction1(l, SCARG(uap, signum),
171 	    SCARG_P32(uap, nsa) ? &nsa : 0,
172 	    SCARG_P32(uap, osa) ? &osa : 0,
173 	    SCARG_P32(uap, tramp), SCARG(uap, vers));
174 	if (error)
175 		return (error);
176 	if (SCARG_P32(uap, osa)) {
177 		NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
178 		sa32.netbsd32_sa_mask = osa.sa_mask;
179 		sa32.netbsd32_sa_flags = osa.sa_flags;
180 		error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
181 		if (error)
182 			return (error);
183 	}
184 	return (0);
185 }
186 
187 #ifdef unused
188 static void
189 netbsd32_si32_to_si(siginfo_t *si, const siginfo32_t *si32)
190 {
191 	memset(si, 0, sizeof (*si));
192 	si->si_signo = si32->si_signo;
193 	si->si_code = si32->si_code;
194 	si->si_errno = si32->si_errno;
195 
196 	switch (si32->si_signo) {
197 	case SIGILL:
198 	case SIGBUS:
199 	case SIGSEGV:
200 	case SIGFPE:
201 	case SIGTRAP:
202 		si->si_addr = NETBSD32PTR64(si32->si_addr);
203 		si->si_trap = si32->si_trap;
204 		break;
205 	case SIGALRM:
206 	case SIGVTALRM:
207 	case SIGPROF:
208 		si->si_pid = si32->si_pid;
209 		si->si_uid = si32->si_uid;
210 		/*
211 		 * XXX sival_ptr is currently unused.
212 		 */
213 		si->si_value.sival_int = si32->si_value.sival_int;
214 		break;
215 	case SIGCHLD:
216 		si->si_pid = si32->si_pid;
217 		si->si_uid = si32->si_uid;
218 		si->si_utime = si32->si_utime;
219 		si->si_stime = si32->si_stime;
220 		break;
221 	case SIGURG:
222 	case SIGIO:
223 		si->si_band = si32->si_band;
224 		si->si_fd = si32->si_fd;
225 		break;
226 	}
227 }
228 #endif
229 
230 void
231 netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si)
232 {
233 	memset(si32, 0, sizeof (*si32));
234 	si32->si_signo = si->si_signo;
235 	si32->si_code = si->si_code;
236 	si32->si_errno = si->si_errno;
237 
238 	switch (si32->si_signo) {
239 	case 0:	/* SA */
240 		si32->si_value.sival_int = si->si_value.sival_int;
241 		break;
242 	case SIGILL:
243 	case SIGBUS:
244 	case SIGSEGV:
245 	case SIGFPE:
246 	case SIGTRAP:
247 		si32->si_addr = (uint32_t)(uintptr_t)si->si_addr;
248 		si32->si_trap = si->si_trap;
249 		break;
250 	case SIGALRM:
251 	case SIGVTALRM:
252 	case SIGPROF:
253 		si32->si_pid = si->si_pid;
254 		si32->si_uid = si->si_uid;
255 		/*
256 		 * XXX sival_ptr is currently unused.
257 		 */
258 		si32->si_value.sival_int = si->si_value.sival_int;
259 		break;
260 	case SIGCHLD:
261 		si32->si_pid = si->si_pid;
262 		si32->si_uid = si->si_uid;
263 		si32->si_status = si->si_status;
264 		si32->si_utime = si->si_utime;
265 		si32->si_stime = si->si_stime;
266 		break;
267 	case SIGURG:
268 	case SIGIO:
269 		si32->si_band = si->si_band;
270 		si32->si_fd = si->si_fd;
271 		break;
272 	}
273 }
274 
275 void
276 getucontext32(struct lwp *l, ucontext32_t *ucp)
277 {
278 	struct proc *p = l->l_proc;
279 
280 	KASSERT(mutex_owned(p->p_lock));
281 
282 	ucp->uc_flags = 0;
283 	ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;
284 	ucp->uc_sigmask = l->l_sigmask;
285 	ucp->uc_flags |= _UC_SIGMASK;
286 
287 	/*
288 	 * The (unsupplied) definition of the `current execution stack'
289 	 * in the System V Interface Definition appears to allow returning
290 	 * the main context stack.
291 	 */
292 	if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) {
293 		ucp->uc_stack.ss_sp = USRSTACK32;
294 		ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize);
295 		ucp->uc_stack.ss_flags = 0;	/* XXX, def. is Very Fishy */
296 	} else {
297 		/* Simply copy alternate signal execution stack. */
298 		ucp->uc_stack.ss_sp =
299 		    (uint32_t)(intptr_t)l->l_sigstk.ss_sp;
300 		ucp->uc_stack.ss_size = l->l_sigstk.ss_size;
301 		ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags;
302 	}
303 	ucp->uc_flags |= _UC_STACK;
304 	mutex_exit(p->p_lock);
305 	cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
306 	mutex_enter(p->p_lock);
307 }
308 
309 int
310 netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval)
311 {
312 	/* {
313 		syscallarg(netbsd32_ucontextp) ucp;
314 	} */
315 	struct proc *p = l->l_proc;
316 	ucontext32_t uc;
317 
318 	memset(&uc, 0, sizeof(uc));
319 
320 	mutex_enter(p->p_lock);
321 	getucontext32(l, &uc);
322 	mutex_exit(p->p_lock);
323 
324 	return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t));
325 }
326 
327 int
328 setucontext32(struct lwp *l, const ucontext32_t *ucp)
329 {
330 	struct proc *p = l->l_proc;
331 	int error;
332 
333 	KASSERT(mutex_owned(p->p_lock));
334 
335 	if ((ucp->uc_flags & _UC_SIGMASK) != 0) {
336 		error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL);
337 		if (error != 0)
338 			return error;
339 	}
340 
341 	mutex_exit(p->p_lock);
342 	error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags);
343 	mutex_enter(p->p_lock);
344 	if (error != 0)
345 		return (error);
346 
347 	l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;
348 
349 	/*
350 	 * If there was stack information, update whether or not we are
351 	 * still running on an alternate signal stack.
352 	 */
353 	if ((ucp->uc_flags & _UC_STACK) != 0) {
354 		if (ucp->uc_stack.ss_flags & SS_ONSTACK)
355 			l->l_sigstk.ss_flags |= SS_ONSTACK;
356 		else
357 			l->l_sigstk.ss_flags &= ~SS_ONSTACK;
358 	}
359 
360 	return 0;
361 }
362 
363 /* ARGSUSED */
364 int
365 netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval)
366 {
367 	/* {
368 		syscallarg(netbsd32_ucontextp) ucp;
369 	} */
370 	ucontext32_t uc;
371 	int error;
372 	struct proc *p = l->l_proc;
373 
374 	error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc));
375 	if (error)
376 		return (error);
377 	if (!(uc.uc_flags & _UC_CPU))
378 		return (EINVAL);
379 	mutex_enter(p->p_lock);
380 	error = setucontext32(l, &uc);
381 	mutex_exit(p->p_lock);
382 	if (error)
383 		return (error);
384 
385 	return (EJUSTRETURN);
386 }
387 
388 static int
389 netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size)
390 {
391 	const siginfo_t *info = src;
392 	siginfo32_t info32;
393 
394 	netbsd32_si_to_si32(&info32, info);
395 
396 	return copyout(&info32, dst, sizeof(info32));
397 }
398 
399 static int
400 netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size)
401 {
402 	struct timespec *ts = dst;
403 	struct netbsd32_timespec ts32;
404 	int error;
405 
406 	error = copyin(src, &ts32, sizeof(ts32));
407 	if (error)
408 		return error;
409 
410 	netbsd32_to_timespec(&ts32, ts);
411 	return 0;
412 }
413 
414 static int
415 netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size)
416 {
417 	const struct timespec *ts = src;
418 	struct netbsd32_timespec ts32;
419 
420 	netbsd32_from_timespec(ts, &ts32);
421 
422 	return copyout(&ts32, dst, sizeof(ts32));
423 }
424 
425 int
426 netbsd32_____sigtimedwait50(struct lwp *l, const struct netbsd32_____sigtimedwait50_args *uap, register_t *retval)
427 {
428 	/* {
429 		syscallarg(netbsd32_sigsetp_t) set;
430 		syscallarg(netbsd32_siginfop_t) info;
431 		syscallarg(netbsd32_timespec50p_t) timeout;
432 	} */
433 	struct sys_____sigtimedwait50_args ua;
434 
435 	NETBSD32TOP_UAP(set, const sigset_t);
436 	NETBSD32TOP_UAP(info, siginfo_t);
437 	NETBSD32TOP_UAP(timeout, struct timespec);
438 
439 	return sigtimedwait1(l, &ua, retval,
440 	    copyin,
441 	    netbsd32_sigtimedwait_put_info,
442 	    netbsd32_sigtimedwait_fetch_timeout,
443 	    netbsd32_sigtimedwait_put_timeout);
444 }
445