netbsd32_signal.c revision 1.43
1 /* $NetBSD: netbsd32_signal.c,v 1.43 2016/09/18 05:16:21 christos 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 1.43 2016/09/18 05:16:21 christos Exp $"); 31 32 #if defined(_KERNEL_OPT) 33 #include "opt_ktrace.h" 34 #endif 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/mount.h> 39 #include <sys/stat.h> 40 #include <sys/time.h> 41 #include <sys/signalvar.h> 42 #include <sys/ktrace.h> 43 #include <sys/proc.h> 44 #include <sys/wait.h> 45 #include <sys/dirent.h> 46 47 #include <uvm/uvm_extern.h> 48 49 #include <compat/netbsd32/netbsd32.h> 50 #include <compat/netbsd32/netbsd32_conv.h> 51 #include <compat/netbsd32/netbsd32_syscallargs.h> 52 53 #include <compat/sys/signal.h> 54 #include <compat/sys/signalvar.h> 55 #include <compat/sys/siginfo.h> 56 #include <compat/sys/ucontext.h> 57 #include <compat/common/compat_sigaltstack.h> 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_sigaction13 *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 memset(&nsa.sa_mask, 0, sizeof(nsa.sa_mask)); 77 nsa.sa_mask.__bits[0] = sa32.netbsd32_sa_mask; 78 nsa.sa_flags = sa32.netbsd32_sa_flags; 79 } 80 error = sigaction1(l, SCARG(uap, signum), 81 SCARG_P32(uap, nsa) ? &nsa : 0, 82 SCARG_P32(uap, osa) ? &osa : 0, 83 NULL, 0); 84 85 if (error) 86 return (error); 87 88 if (SCARG_P32(uap, osa)) { 89 NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler); 90 sa32.netbsd32_sa_mask = osa.sa_mask.__bits[0]; 91 sa32.netbsd32_sa_flags = osa.sa_flags; 92 sa32p = SCARG_P32(uap, osa); 93 if (copyout(&sa32, sa32p, sizeof(sa32))) 94 return EFAULT; 95 } 96 97 return (0); 98 } 99 100 int 101 netbsd32___sigaltstack14(struct lwp *l, const struct netbsd32___sigaltstack14_args *uap, register_t *retval) 102 { 103 /* { 104 syscallarg(const netbsd32_sigaltstackp_t) nss; 105 syscallarg(netbsd32_sigaltstackp_t) oss; 106 } */ 107 compat_sigaltstack(uap, netbsd32_sigaltstack, SS_ONSTACK, SS_DISABLE); 108 } 109 110 /* ARGSUSED */ 111 int 112 netbsd32___sigaction14(struct lwp *l, const struct netbsd32___sigaction14_args *uap, register_t *retval) 113 { 114 /* { 115 syscallarg(int) signum; 116 syscallarg(const struct sigaction *) nsa; 117 syscallarg(struct sigaction *) osa; 118 } */ 119 struct netbsd32_sigaction sa32; 120 struct sigaction nsa, osa; 121 int error; 122 123 if (SCARG_P32(uap, nsa)) { 124 error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32)); 125 if (error) 126 return (error); 127 nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler); 128 nsa.sa_mask = sa32.netbsd32_sa_mask; 129 nsa.sa_flags = sa32.netbsd32_sa_flags; 130 } 131 error = sigaction1(l, SCARG(uap, signum), 132 SCARG_P32(uap, nsa) ? &nsa : 0, 133 SCARG_P32(uap, osa) ? &osa : 0, 134 NULL, 0); 135 if (error) 136 return (error); 137 if (SCARG_P32(uap, osa)) { 138 NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler); 139 sa32.netbsd32_sa_mask = osa.sa_mask; 140 sa32.netbsd32_sa_flags = osa.sa_flags; 141 error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32)); 142 if (error) 143 return (error); 144 } 145 return (0); 146 } 147 148 /* ARGSUSED */ 149 int 150 netbsd32___sigaction_sigtramp(struct lwp *l, const struct netbsd32___sigaction_sigtramp_args *uap, register_t *retval) 151 { 152 /* { 153 syscallarg(int) signum; 154 syscallarg(const netbsd32_sigactionp_t) nsa; 155 syscallarg(netbsd32_sigactionp_t) osa; 156 syscallarg(netbsd32_voidp) tramp; 157 syscallarg(int) vers; 158 } */ 159 struct netbsd32_sigaction sa32; 160 struct sigaction nsa, osa; 161 int error; 162 163 if (SCARG_P32(uap, nsa)) { 164 error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32)); 165 if (error) 166 return (error); 167 nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler); 168 nsa.sa_mask = sa32.netbsd32_sa_mask; 169 nsa.sa_flags = sa32.netbsd32_sa_flags; 170 } 171 error = sigaction1(l, SCARG(uap, signum), 172 SCARG_P32(uap, nsa) ? &nsa : 0, 173 SCARG_P32(uap, osa) ? &osa : 0, 174 SCARG_P32(uap, tramp), SCARG(uap, vers)); 175 if (error) 176 return (error); 177 if (SCARG_P32(uap, osa)) { 178 NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler); 179 sa32.netbsd32_sa_mask = osa.sa_mask; 180 sa32.netbsd32_sa_flags = osa.sa_flags; 181 error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32)); 182 if (error) 183 return (error); 184 } 185 return (0); 186 } 187 188 void 189 netbsd32_ksi32_to_ksi(struct _ksiginfo *si, const struct __ksiginfo32 *si32) 190 { 191 memset(si, 0, sizeof (*si)); 192 si->_signo = si32->_signo; 193 si->_code = si32->_code; 194 si->_errno = si32->_errno; 195 196 switch (si32->_signo) { 197 case SIGILL: 198 case SIGBUS: 199 case SIGSEGV: 200 case SIGFPE: 201 case SIGTRAP: 202 si->_reason._fault._addr = 203 NETBSD32IPTR64(si32->_reason._fault._addr); 204 si->_reason._fault._trap = si32->_reason._fault._trap; 205 break; 206 case SIGALRM: 207 case SIGVTALRM: 208 case SIGPROF: 209 default: /* see sigqueue() and kill1() */ 210 si->_reason._rt._pid = si32->_reason._rt._pid; 211 si->_reason._rt._uid = si32->_reason._rt._uid; 212 si->_reason._rt._value.sival_int = 213 si32->_reason._rt._value.sival_int; 214 break; 215 case SIGCHLD: 216 si->_reason._child._pid = si32->_reason._child._pid; 217 si->_reason._child._uid = si32->_reason._child._uid; 218 si->_reason._child._utime = si32->_reason._child._utime; 219 si->_reason._child._stime = si32->_reason._child._stime; 220 break; 221 case SIGURG: 222 case SIGIO: 223 si->_reason._poll._band = si32->_reason._poll._band; 224 si->_reason._poll._fd = si32->_reason._poll._fd; 225 break; 226 } 227 } 228 229 #ifdef KTRACE 230 static void 231 netbsd32_ksi_to_ksi32(struct __ksiginfo32 *si32, const struct _ksiginfo *si) 232 { 233 memset(si32, 0, sizeof (*si32)); 234 si32->_signo = si->_signo; 235 si32->_code = si->_code; 236 si32->_errno = si->_errno; 237 238 switch (si->_signo) { 239 case SIGILL: 240 case SIGBUS: 241 case SIGSEGV: 242 case SIGFPE: 243 case SIGTRAP: 244 si32->_reason._fault._addr = 245 NETBSD32PTR32I(si->_reason._fault._addr); 246 si32->_reason._fault._trap = si->_reason._fault._trap; 247 break; 248 case SIGALRM: 249 case SIGVTALRM: 250 case SIGPROF: 251 default: /* see sigqueue() and kill1() */ 252 si32->_reason._rt._pid = si->_reason._rt._pid; 253 si32->_reason._rt._uid = si->_reason._rt._uid; 254 si32->_reason._rt._value.sival_int = 255 si->_reason._rt._value.sival_int; 256 break; 257 case SIGCHLD: 258 si32->_reason._child._pid = si->_reason._child._pid; 259 si32->_reason._child._uid = si->_reason._child._uid; 260 si32->_reason._child._utime = si->_reason._child._utime; 261 si32->_reason._child._stime = si->_reason._child._stime; 262 break; 263 case SIGURG: 264 case SIGIO: 265 si32->_reason._poll._band = si->_reason._poll._band; 266 si32->_reason._poll._fd = si->_reason._poll._fd; 267 break; 268 } 269 } 270 #endif 271 272 void 273 netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si) 274 { 275 memset(si32, 0, sizeof (*si32)); 276 si32->si_signo = si->si_signo; 277 si32->si_code = si->si_code; 278 si32->si_errno = si->si_errno; 279 280 switch (si32->si_signo) { 281 case 0: /* SA */ 282 si32->si_value.sival_int = si->si_value.sival_int; 283 break; 284 case SIGILL: 285 case SIGBUS: 286 case SIGSEGV: 287 case SIGFPE: 288 case SIGTRAP: 289 si32->si_addr = (uint32_t)(uintptr_t)si->si_addr; 290 si32->si_trap = si->si_trap; 291 break; 292 case SIGALRM: 293 case SIGVTALRM: 294 case SIGPROF: 295 default: 296 si32->si_pid = si->si_pid; 297 si32->si_uid = si->si_uid; 298 si32->si_value.sival_int = si->si_value.sival_int; 299 break; 300 case SIGCHLD: 301 si32->si_pid = si->si_pid; 302 si32->si_uid = si->si_uid; 303 si32->si_status = si->si_status; 304 si32->si_utime = si->si_utime; 305 si32->si_stime = si->si_stime; 306 break; 307 case SIGURG: 308 case SIGIO: 309 si32->si_band = si->si_band; 310 si32->si_fd = si->si_fd; 311 break; 312 } 313 } 314 315 void 316 getucontext32(struct lwp *l, ucontext32_t *ucp) 317 { 318 struct proc *p = l->l_proc; 319 320 KASSERT(mutex_owned(p->p_lock)); 321 322 ucp->uc_flags = 0; 323 ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink; 324 ucp->uc_sigmask = l->l_sigmask; 325 ucp->uc_flags |= _UC_SIGMASK; 326 327 /* 328 * The (unsupplied) definition of the `current execution stack' 329 * in the System V Interface Definition appears to allow returning 330 * the main context stack. 331 */ 332 if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) { 333 ucp->uc_stack.ss_sp = USRSTACK32; 334 ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize); 335 ucp->uc_stack.ss_flags = 0; /* XXX, def. is Very Fishy */ 336 } else { 337 /* Simply copy alternate signal execution stack. */ 338 ucp->uc_stack.ss_sp = 339 (uint32_t)(intptr_t)l->l_sigstk.ss_sp; 340 ucp->uc_stack.ss_size = l->l_sigstk.ss_size; 341 ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags; 342 } 343 ucp->uc_flags |= _UC_STACK; 344 mutex_exit(p->p_lock); 345 cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags); 346 mutex_enter(p->p_lock); 347 } 348 349 int 350 netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval) 351 { 352 /* { 353 syscallarg(netbsd32_ucontextp) ucp; 354 } */ 355 struct proc *p = l->l_proc; 356 ucontext32_t uc; 357 358 memset(&uc, 0, sizeof(uc)); 359 360 mutex_enter(p->p_lock); 361 getucontext32(l, &uc); 362 mutex_exit(p->p_lock); 363 364 return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t)); 365 } 366 367 int 368 setucontext32(struct lwp *l, const ucontext32_t *ucp) 369 { 370 struct proc *p = l->l_proc; 371 int error; 372 373 KASSERT(mutex_owned(p->p_lock)); 374 375 if ((ucp->uc_flags & _UC_SIGMASK) != 0) { 376 error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL); 377 if (error != 0) 378 return error; 379 } 380 381 mutex_exit(p->p_lock); 382 error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags); 383 mutex_enter(p->p_lock); 384 if (error != 0) 385 return (error); 386 387 l->l_ctxlink = (void *)(intptr_t)ucp->uc_link; 388 389 /* 390 * If there was stack information, update whether or not we are 391 * still running on an alternate signal stack. 392 */ 393 if ((ucp->uc_flags & _UC_STACK) != 0) { 394 if (ucp->uc_stack.ss_flags & SS_ONSTACK) 395 l->l_sigstk.ss_flags |= SS_ONSTACK; 396 else 397 l->l_sigstk.ss_flags &= ~SS_ONSTACK; 398 } 399 400 return 0; 401 } 402 403 /* ARGSUSED */ 404 int 405 netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval) 406 { 407 /* { 408 syscallarg(netbsd32_ucontextp) ucp; 409 } */ 410 ucontext32_t uc; 411 int error; 412 struct proc *p = l->l_proc; 413 414 error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc)); 415 if (error) 416 return (error); 417 if (!(uc.uc_flags & _UC_CPU)) 418 return (EINVAL); 419 mutex_enter(p->p_lock); 420 error = setucontext32(l, &uc); 421 mutex_exit(p->p_lock); 422 if (error) 423 return (error); 424 425 return (EJUSTRETURN); 426 } 427 428 static int 429 netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size) 430 { 431 const siginfo_t *info = src; 432 siginfo32_t info32; 433 434 netbsd32_si_to_si32(&info32, info); 435 436 return copyout(&info32, dst, sizeof(info32)); 437 } 438 439 static int 440 netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size) 441 { 442 struct timespec *ts = dst; 443 struct netbsd32_timespec ts32; 444 int error; 445 446 error = copyin(src, &ts32, sizeof(ts32)); 447 if (error) 448 return error; 449 450 netbsd32_to_timespec(&ts32, ts); 451 return 0; 452 } 453 454 static int 455 netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size) 456 { 457 const struct timespec *ts = src; 458 struct netbsd32_timespec ts32; 459 460 netbsd32_from_timespec(ts, &ts32); 461 462 return copyout(&ts32, dst, sizeof(ts32)); 463 } 464 465 int 466 netbsd32_____sigtimedwait50(struct lwp *l, const struct netbsd32_____sigtimedwait50_args *uap, register_t *retval) 467 { 468 /* { 469 syscallarg(netbsd32_sigsetp_t) set; 470 syscallarg(netbsd32_siginfop_t) info; 471 syscallarg(netbsd32_timespec50p_t) timeout; 472 } */ 473 struct sys_____sigtimedwait50_args ua; 474 475 NETBSD32TOP_UAP(set, const sigset_t); 476 NETBSD32TOP_UAP(info, siginfo_t); 477 NETBSD32TOP_UAP(timeout, struct timespec); 478 479 return sigtimedwait1(l, &ua, retval, 480 copyin, 481 netbsd32_sigtimedwait_put_info, 482 netbsd32_sigtimedwait_fetch_timeout, 483 netbsd32_sigtimedwait_put_timeout); 484 } 485 486 int 487 netbsd32_sigqueueinfo(struct lwp *l, 488 const struct netbsd32_sigqueueinfo_args *uap, register_t *retval) 489 { 490 /* { 491 syscallarg(pid_t) pid; 492 syscallarg(const netbsd32_siginfop_t) info; 493 } */ 494 struct __ksiginfo32 ksi32; 495 ksiginfo_t ksi; 496 int error; 497 498 if ((error = copyin(SCARG_P32(uap, info), &ksi32, 499 sizeof(ksi32))) != 0) 500 return error; 501 502 KSI_INIT(&ksi); 503 netbsd32_ksi32_to_ksi(&ksi.ksi_info, &ksi32); 504 505 return kill1(l, SCARG(uap, pid), &ksi, retval); 506 } 507 508 struct netbsd32_ktr_psig { 509 int signo; 510 netbsd32_pointer_t action; 511 sigset_t mask; 512 int code; 513 /* and optional siginfo_t */ 514 }; 515 516 #ifdef KTRACE 517 void 518 netbsd32_ktrpsig(int sig, sig_t action, const sigset_t *mask, 519 const ksiginfo_t *ksi) 520 { 521 struct ktrace_entry *kte; 522 lwp_t *l = curlwp; 523 struct { 524 struct netbsd32_ktr_psig kp; 525 siginfo32_t si; 526 } *kbuf; 527 528 if (!KTRPOINT(l->l_proc, KTR_PSIG)) 529 return; 530 531 if (ktealloc(&kte, (void *)&kbuf, l, KTR_PSIG, sizeof(*kbuf))) 532 return; 533 534 kbuf->kp.signo = (char)sig; 535 NETBSD32PTR32(kbuf->kp.action, action); 536 kbuf->kp.mask = *mask; 537 538 if (ksi) { 539 kbuf->kp.code = KSI_TRAPCODE(ksi); 540 (void)memset(&kbuf->si, 0, sizeof(kbuf->si)); 541 netbsd32_ksi_to_ksi32(&kbuf->si._info, &ksi->ksi_info); 542 ktesethdrlen(kte, sizeof(*kbuf)); 543 } else { 544 kbuf->kp.code = 0; 545 ktesethdrlen(kte, sizeof(struct netbsd32_ktr_psig)); 546 } 547 548 ktraddentry(l, kte, KTA_WAITOK); 549 } 550 #endif 551 552 553
Indexes created Mon Sep 22 13:09:51 GMT 2025