xref: /netbsd-src/sys/compat/netbsd32/netbsd32_signal.c (revision d48f14661dda8638fee055ba15d35bdfb29b9fa8) 
1 /*	$NetBSD: netbsd32_signal.c,v 1.17 2006/03/15 09:09:47 cube 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  * 3. The name of the author may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30 
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: netbsd32_signal.c,v 1.17 2006/03/15 09:09:47 cube Exp $");
33 
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/malloc.h>
37 #include <sys/mount.h>
38 #include <sys/stat.h>
39 #include <sys/time.h>
40 #include <sys/signalvar.h>
41 #include <sys/proc.h>
42 #include <sys/wait.h>
43 #include <sys/dirent.h>
44 
45 #include <uvm/uvm_extern.h>
46 
47 #include <compat/netbsd32/netbsd32.h>
48 #include <compat/netbsd32/netbsd32_conv.h>
49 #include <compat/netbsd32/netbsd32_syscallargs.h>
50 
51 #include <compat/sys/signal.h>
52 #include <compat/sys/signalvar.h>
53 #include <compat/sys/siginfo.h>
54 #include <compat/sys/ucontext.h>
55 
56 #ifdef unused
57 static void netbsd32_si32_to_si(siginfo_t *, const siginfo32_t *);
58 #endif
59 
60 
61 int
62 netbsd32_sigaction(l, v, retval)
63 	struct lwp *l;
64 	void *v;
65 	register_t *retval;
66 {
67 	struct netbsd32_sigaction_args /* {
68 		syscallarg(int) signum;
69 		syscallarg(const netbsd32_sigactionp_t) nsa;
70 		syscallarg(netbsd32_sigactionp_t) osa;
71 	} */ *uap = v;
72 	struct sigaction nsa, osa;
73 	struct netbsd32_sigaction *sa32p, sa32;
74 	int error;
75 
76 	if (SCARG(uap, nsa)) {
77 		sa32p =
78 		    (struct netbsd32_sigaction *)NETBSD32PTR64(SCARG(uap, nsa));
79 		if (copyin(sa32p, &sa32, sizeof(sa32)))
80 			return EFAULT;
81 		nsa.sa_handler = (void *)NETBSD32PTR64(sa32.netbsd32_sa_handler);
82 		nsa.sa_mask = sa32.netbsd32_sa_mask;
83 		nsa.sa_flags = sa32.netbsd32_sa_flags;
84 	}
85 	error = sigaction1(l->l_proc, SCARG(uap, signum),
86 			   SCARG(uap, nsa) ? &nsa : 0,
87 			   SCARG(uap, osa) ? &osa : 0,
88 			   NULL, 0);
89 
90 	if (error)
91 		return (error);
92 
93 	if (SCARG(uap, osa)) {
94 		sa32.netbsd32_sa_handler = (netbsd32_sigactionp_t)(u_long)osa.sa_handler;
95 		sa32.netbsd32_sa_mask = osa.sa_mask;
96 		sa32.netbsd32_sa_flags = osa.sa_flags;
97 		sa32p =
98 		    (struct netbsd32_sigaction *)NETBSD32PTR64(SCARG(uap, osa));
99 		if (copyout(&sa32, sa32p, sizeof(sa32)))
100 			return EFAULT;
101 	}
102 
103 	return (0);
104 }
105 
106 int
107 netbsd32___sigaltstack14(l, v, retval)
108 	struct lwp *l;
109 	void *v;
110 	register_t *retval;
111 {
112 	struct netbsd32___sigaltstack14_args /* {
113 		syscallarg(const netbsd32_sigaltstackp_t) nss;
114 		syscallarg(netbsd32_sigaltstackp_t) oss;
115 	} */ *uap = v;
116 	struct netbsd32_sigaltstack s32;
117 	struct sigaltstack nss, oss;
118 	int error;
119 
120 	if (SCARG(uap, nss)) {
121 		error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, nss)), &s32,
122 		    sizeof(s32));
123 		if (error)
124 			return (error);
125 		nss.ss_sp = (void *)NETBSD32PTR64(s32.ss_sp);
126 		nss.ss_size = (size_t)s32.ss_size;
127 		nss.ss_flags = s32.ss_flags;
128 	}
129 	error = sigaltstack1(l->l_proc,
130 	    SCARG(uap, nss) ? &nss : 0, SCARG(uap, oss) ? &oss : 0);
131 	if (error)
132 		return (error);
133 	if (SCARG(uap, oss)) {
134 		s32.ss_sp = (netbsd32_voidp)(u_long)oss.ss_sp;
135 		s32.ss_size = (netbsd32_size_t)oss.ss_size;
136 		s32.ss_flags = oss.ss_flags;
137 		error = copyout(&s32, (caddr_t)NETBSD32PTR64(SCARG(uap, oss)),
138 		    sizeof(s32));
139 		if (error)
140 			return (error);
141 	}
142 	return (0);
143 }
144 
145 /* ARGSUSED */
146 int
147 netbsd32___sigaction14(l, v, retval)
148 	struct lwp *l;
149 	void *v;
150 	register_t *retval;
151 {
152 	struct netbsd32___sigaction14_args /* {
153 		syscallarg(int) signum;
154 		syscallarg(const struct sigaction *) nsa;
155 		syscallarg(struct sigaction *) osa;
156 	} */ *uap = v;
157 	struct netbsd32_sigaction sa32;
158 	struct sigaction nsa, osa;
159 	int error;
160 
161 	if (SCARG(uap, nsa)) {
162 		error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, nsa)), &sa32,
163 		    sizeof(sa32));
164 		if (error)
165 			return (error);
166 		nsa.sa_handler = (void *)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->l_proc, SCARG(uap, signum),
171 	    SCARG(uap, nsa) ? &nsa : 0, SCARG(uap, osa) ? &osa : 0,
172 	    NULL, 0);
173 	if (error)
174 		return (error);
175 	if (SCARG(uap, osa)) {
176 		sa32.netbsd32_sa_handler = (netbsd32_voidp)(u_long)osa.sa_handler;
177 		sa32.netbsd32_sa_mask = osa.sa_mask;
178 		sa32.netbsd32_sa_flags = osa.sa_flags;
179 		error = copyout(&sa32, (caddr_t)NETBSD32PTR64(SCARG(uap, osa)),
180 		    sizeof(sa32));
181 		if (error)
182 			return (error);
183 	}
184 	return (0);
185 }
186 
187 /* ARGSUSED */
188 int
189 netbsd32___sigaction_sigtramp(l, v, retval)
190 	struct lwp *l;
191 	void *v;
192 	register_t *retval;
193 {
194 	struct netbsd32___sigaction_sigtramp_args /* {
195 		syscallarg(int) signum;
196 		syscallarg(const netbsd32_sigactionp_t) nsa;
197 		syscallarg(netbsd32_sigactionp_t) osa;
198 		syscallarg(netbsd32_voidp) tramp;
199 		syscallarg(int) vers;
200 	} */ *uap = v;
201 	struct proc *p = l->l_proc;
202 	struct netbsd32_sigaction sa32;
203 	struct sigaction nsa, osa;
204 	int error;
205 
206 	if (SCARG(uap, nsa)) {
207 		error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, nsa)), &sa32,
208 		    sizeof(sa32));
209 		if (error)
210 			return (error);
211 		nsa.sa_handler = (void *)NETBSD32PTR64(sa32.netbsd32_sa_handler);
212 		nsa.sa_mask = sa32.netbsd32_sa_mask;
213 		nsa.sa_flags = sa32.netbsd32_sa_flags;
214 	}
215 	error = sigaction1(p, SCARG(uap, signum),
216 	    SCARG(uap, nsa) ? &nsa : 0, SCARG(uap, osa) ? &osa : 0,
217 	    NETBSD32PTR64(SCARG(uap, tramp)), SCARG(uap, vers));
218 	if (error)
219 		return (error);
220 	if (SCARG(uap, osa)) {
221 		sa32.netbsd32_sa_handler = (netbsd32_voidp)(u_long)osa.sa_handler;
222 		sa32.netbsd32_sa_mask = osa.sa_mask;
223 		sa32.netbsd32_sa_flags = osa.sa_flags;
224 		error = copyout(&sa32, (caddr_t)NETBSD32PTR64(SCARG(uap, osa)),
225 		    sizeof(sa32));
226 		if (error)
227 			return (error);
228 	}
229 	return (0);
230 }
231 
232 #ifdef unused
233 static void
234 netbsd32_si32_to_si(siginfo_t *si, const siginfo32_t *si32)
235 {
236 	memset(si, 0, sizeof (*si));
237 	si->si_signo = si32->si_signo;
238 	si->si_code = si32->si_code;
239 	si->si_errno = si32->si_errno;
240 
241 	switch (si32->si_signo) {
242 	case SIGILL:
243 	case SIGBUS:
244 	case SIGSEGV:
245 	case SIGFPE:
246 	case SIGTRAP:
247 		si->si_addr = (void *)NETBSD32PTR64(si32->si_addr);
248 		si->si_trap = si32->si_trap;
249 		break;
250 	case SIGALRM:
251 	case SIGVTALRM:
252 	case SIGPROF:
253 		si->si_pid = si32->si_pid;
254 		si->si_uid = si32->si_uid;
255 		/*
256 		 * XXX sival_ptr is currently unused.
257 		 */
258 		si->si_sigval.sival_int = si32->si_sigval.sival_int;
259 		break;
260 	case SIGCHLD:
261 		si->si_pid = si32->si_pid;
262 		si->si_uid = si32->si_uid;
263 		si->si_utime = si32->si_utime;
264 		si->si_stime = si32->si_stime;
265 		break;
266 	case SIGURG:
267 	case SIGIO:
268 		si->si_band = si32->si_band;
269 		si->si_fd = si32->si_fd;
270 		break;
271 	}
272 }
273 #endif
274 
275 void
276 netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si)
277 {
278 	memset(si32, 0, sizeof (*si32));
279 	si32->si_signo = si->si_signo;
280 	si32->si_code = si->si_code;
281 	si32->si_errno = si->si_errno;
282 
283 	switch (si32->si_signo) {
284 	case 0:	/* SA */
285 		si32->si_sigval.sival_int = si->si_sigval.sival_int;
286 		break;
287 	case SIGILL:
288 	case SIGBUS:
289 	case SIGSEGV:
290 	case SIGFPE:
291 	case SIGTRAP:
292 		si32->si_addr = (uint32_t)(uintptr_t)si->si_addr;
293 		si32->si_trap = si->si_trap;
294 		break;
295 	case SIGALRM:
296 	case SIGVTALRM:
297 	case SIGPROF:
298 		si32->si_pid = si->si_pid;
299 		si32->si_uid = si->si_uid;
300 		/*
301 		 * XXX sival_ptr is currently unused.
302 		 */
303 		si32->si_sigval.sival_int = si->si_sigval.sival_int;
304 		break;
305 	case SIGCHLD:
306 		si32->si_pid = si->si_pid;
307 		si32->si_uid = si->si_uid;
308 		si32->si_status = si->si_status;
309 		si32->si_utime = si->si_utime;
310 		si32->si_stime = si->si_stime;
311 		break;
312 	case SIGURG:
313 	case SIGIO:
314 		si32->si_band = si->si_band;
315 		si32->si_fd = si->si_fd;
316 		break;
317 	}
318 }
319 
320 void
321 getucontext32(struct lwp *l, ucontext32_t *ucp)
322 {
323 	struct proc	*p;
324 
325 	p = l->l_proc;
326 
327 	ucp->uc_flags = 0;
328 	ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;
329 
330 	(void)sigprocmask1(p, 0, NULL, &ucp->uc_sigmask);
331 	ucp->uc_flags |= _UC_SIGMASK;
332 
333 	/*
334 	 * The (unsupplied) definition of the `current execution stack'
335 	 * in the System V Interface Definition appears to allow returning
336 	 * the main context stack.
337 	 */
338 	if ((p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK) == 0) {
339 		ucp->uc_stack.ss_sp = USRSTACK32;
340 		ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize);
341 		ucp->uc_stack.ss_flags = 0;	/* XXX, def. is Very Fishy */
342 	} else {
343 		/* Simply copy alternate signal execution stack. */
344 		ucp->uc_stack.ss_sp =
345 		    (uint32_t)(intptr_t)p->p_sigctx.ps_sigstk.ss_sp;
346 		ucp->uc_stack.ss_size = p->p_sigctx.ps_sigstk.ss_size;
347 		ucp->uc_stack.ss_flags = p->p_sigctx.ps_sigstk.ss_flags;
348 	}
349 	ucp->uc_flags |= _UC_STACK;
350 
351 	cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
352 }
353 
354 /* ARGSUSED */
355 int
356 netbsd32_getcontext(struct lwp *l, void *v, register_t *retval)
357 {
358 	struct netbsd32_getcontext_args /* {
359 		syscallarg(netbsd32_ucontextp) ucp;
360 	} */ *uap = v;
361 	ucontext32_t uc;
362 
363 	getucontext32(l, &uc);
364 
365 	return copyout(&uc, NETBSD32PTR64(SCARG(uap, ucp)),
366 	    sizeof (ucontext32_t));
367 }
368 
369 int
370 setucontext32(struct lwp *l, const ucontext32_t *ucp)
371 {
372 	struct proc	*p;
373 	int		error;
374 
375 	p = l->l_proc;
376 	if ((error = cpu_setmcontext32(l, &ucp->uc_mcontext,
377 	     ucp->uc_flags)) != 0)
378 		return (error);
379 	l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;
380 	/*
381 	 * We might want to take care of the stack portion here but currently
382 	 * don't; see the comment in getucontext().
383 	 */
384 	if ((ucp->uc_flags & _UC_SIGMASK) != 0)
385 		sigprocmask1(p, SIG_SETMASK, &ucp->uc_sigmask, NULL);
386 
387 	return 0;
388 }
389 
390 /* ARGSUSED */
391 int
392 netbsd32_setcontext(struct lwp *l, void *v, register_t *retval)
393 {
394 	struct netbsd32_setcontext_args /* {
395 		syscallarg(netbsd32_ucontextp) ucp;
396 	} */ *uap = v;
397 	ucontext32_t uc;
398 	int error;
399 	void *p;
400 
401 	p = NETBSD32PTR64(SCARG(uap, ucp));
402 	if (p == NULL)
403 		exit1(l, W_EXITCODE(0, 0));
404 	else if ((error = copyin(p, &uc, sizeof (uc))) != 0 ||
405 	    (error = setucontext32(l, &uc)) != 0)
406 		return (error);
407 
408 	return (EJUSTRETURN);
409 }
410 
411 static int
412 netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size)
413 {
414 	const siginfo_t *info = src;
415 	siginfo32_t info32;
416 
417 	netbsd32_si_to_si32(&info32, info);
418 
419 	return copyout(&info32, dst, sizeof(info32));
420 }
421 
422 static int
423 netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size)
424 {
425 	struct timespec *ts = dst;
426 	struct netbsd32_timespec ts32;
427 	int error;
428 
429 	error = copyin(src, &ts32, sizeof(ts32));
430 	if (error)
431 		return error;
432 
433 	netbsd32_to_timespec(&ts32, ts);
434 	return 0;
435 }
436 
437 static int
438 netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size)
439 {
440 	const struct timespec *ts = src;
441 	struct netbsd32_timespec ts32;
442 
443 	netbsd32_from_timespec(ts, &ts32);
444 
445 	return copyout(&ts32, dst, sizeof(ts32));
446 }
447 
448 int
449 netbsd32___sigtimedwait(struct lwp *l, void *v, register_t *retval)
450 {
451 	struct netbsd32___sigtimedwait_args /* {
452 		syscallarg(netbsd32_sigsetp_t) set;
453 		syscallarg(netbsd32_siginfop_t) info;
454 		syscallarg(netbsd32_timespecp_t) timeout;
455 	} */ *uap = v;
456 	struct sys___sigtimedwait_args ua;
457 
458 	NETBSD32TOP_UAP(set, const sigset_t);
459 	NETBSD32TOP_UAP(info, siginfo_t);
460 	NETBSD32TOP_UAP(timeout, struct timespec);
461 
462 	return __sigtimedwait1(l, &ua, retval, netbsd32_sigtimedwait_put_info,
463 	    netbsd32_sigtimedwait_fetch_timeout,
464 	    netbsd32_sigtimedwait_put_timeout);
465 }
466