netbsd32_signal.c revision 1.49
1 /* $NetBSD: netbsd32_signal.c,v 1.49 2019/11/18 10:25:48 rin 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 1.49 2019/11/18 10:25:48 rin 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 size_t i; 192 193 memset(si, 0, sizeof (*si)); 194 si->_signo = si32->_signo; 195 si->_code = si32->_code; 196 si->_errno = si32->_errno; 197 198 if (si32->_code == SI_NOINFO) 199 return; 200 else if (si32->_code <= 0) /* codes described in siginfo(2) */ 201 goto fill_rt; 202 203 switch (si32->_signo) { 204 case SIGILL: 205 case SIGFPE: 206 case SIGBUS: 207 case SIGSEGV: 208 fill_fault: 209 si->_reason._fault._addr = 210 NETBSD32IPTR64(si32->_reason._fault._addr); 211 si->_reason._fault._trap = si32->_reason._fault._trap; 212 break; 213 case SIGTRAP: 214 switch (si32->_code) { 215 case TRAP_EXEC: 216 case TRAP_CHLD: 217 case TRAP_LWP: 218 si->_reason._ptrace_state._pe_report_event = 219 si32->_reason._ptrace_state._pe_report_event; 220 CTASSERT(sizeof(si->_reason._ptrace_state._option._pe_other_pid) == 221 sizeof(si->_reason._ptrace_state._option._pe_lwp)); 222 si->_reason._ptrace_state._option._pe_other_pid = 223 si32->_reason._ptrace_state._option._pe_other_pid; 224 break; 225 case TRAP_SCE: 226 case TRAP_SCX: 227 si->_reason._syscall._sysnum = 228 si32->_reason._syscall._sysnum; 229 si->_reason._syscall._retval[0] = 230 si32->_reason._syscall._retval[0]; 231 si->_reason._syscall._retval[1] = 232 si32->_reason._syscall._retval[1]; 233 si->_reason._syscall._error = 234 si32->_reason._syscall._error; 235 for (i = 0; 236 i < __arraycount(si->_reason._syscall._args); i++) 237 si->_reason._syscall._args[i] = 238 si32->_reason._syscall._args[i]; 239 break; 240 default: 241 goto fill_fault; 242 } 243 break; 244 case SIGALRM: 245 case SIGVTALRM: 246 case SIGPROF: 247 default: /* see sigqueue() and kill1() */ 248 fill_rt: 249 si->_reason._rt._pid = si32->_reason._rt._pid; 250 si->_reason._rt._uid = si32->_reason._rt._uid; 251 si->_reason._rt._value.sival_int = 252 si32->_reason._rt._value.sival_int; 253 break; 254 case SIGURG: 255 case SIGIO: 256 si->_reason._poll._band = si32->_reason._poll._band; 257 si->_reason._poll._fd = si32->_reason._poll._fd; 258 break; 259 case SIGCHLD: 260 si->_reason._child._pid = si32->_reason._child._pid; 261 si->_reason._child._uid = si32->_reason._child._uid; 262 si->_reason._child._status = si32->_reason._child._status; 263 si->_reason._child._utime = si32->_reason._child._utime; 264 si->_reason._child._stime = si32->_reason._child._stime; 265 break; 266 } 267 } 268 269 void 270 netbsd32_si32_to_si(siginfo_t *si, const siginfo32_t *si32) 271 { 272 273 memset(si, 0, sizeof (*si)); 274 netbsd32_ksi32_to_ksi(&si->_info, &si32->_info); 275 } 276 277 static void 278 netbsd32_ksi_to_ksi32(struct __ksiginfo32 *si32, const struct _ksiginfo *si) 279 { 280 size_t i; 281 282 memset(si32, 0, sizeof (*si32)); 283 si32->_signo = si->_signo; 284 si32->_code = si->_code; 285 si32->_errno = si->_errno; 286 287 if (si->_code == SI_NOINFO) 288 return; 289 else if (si->_code <= 0) /* codes described in siginfo(2) */ 290 goto fill_rt; 291 292 switch (si->_signo) { 293 case SIGILL: 294 case SIGFPE: 295 case SIGBUS: 296 case SIGSEGV: 297 fill_fault: 298 si32->_reason._fault._addr = 299 NETBSD32PTR32I(si->_reason._fault._addr); 300 si32->_reason._fault._trap = si->_reason._fault._trap; 301 break; 302 case SIGTRAP: 303 switch (si->_code) { 304 case TRAP_EXEC: 305 case TRAP_CHLD: 306 case TRAP_LWP: 307 si32->_reason._ptrace_state._pe_report_event = 308 si->_reason._ptrace_state._pe_report_event; 309 CTASSERT(sizeof(si32->_reason._ptrace_state._option._pe_other_pid) == 310 sizeof(si32->_reason._ptrace_state._option._pe_lwp)); 311 si32->_reason._ptrace_state._option._pe_other_pid = 312 si->_reason._ptrace_state._option._pe_other_pid; 313 break; 314 case TRAP_SCE: 315 case TRAP_SCX: 316 si32->_reason._syscall._sysnum = 317 si->_reason._syscall._sysnum; 318 si32->_reason._syscall._retval[0] = 319 si->_reason._syscall._retval[0]; 320 si32->_reason._syscall._retval[1] = 321 si->_reason._syscall._retval[1]; 322 si32->_reason._syscall._error = 323 si->_reason._syscall._error; 324 for (i = 0; 325 i < __arraycount(si->_reason._syscall._args); i++) 326 si32->_reason._syscall._args[i] = 327 si->_reason._syscall._args[i]; 328 break; 329 default: 330 goto fill_fault; 331 } 332 break; 333 case SIGALRM: 334 case SIGVTALRM: 335 case SIGPROF: 336 default: /* see sigqueue() and kill1() */ 337 fill_rt: 338 si32->_reason._rt._pid = si->_reason._rt._pid; 339 si32->_reason._rt._uid = si->_reason._rt._uid; 340 si32->_reason._rt._value.sival_int = 341 si->_reason._rt._value.sival_int; 342 break; 343 case SIGURG: 344 case SIGIO: 345 si32->_reason._poll._band = si->_reason._poll._band; 346 si32->_reason._poll._fd = si->_reason._poll._fd; 347 break; 348 case SIGCHLD: 349 si32->_reason._child._pid = si->_reason._child._pid; 350 si32->_reason._child._uid = si->_reason._child._uid; 351 si32->_reason._child._status = si->_reason._child._status; 352 si32->_reason._child._utime = si->_reason._child._utime; 353 si32->_reason._child._stime = si->_reason._child._stime; 354 break; 355 } 356 } 357 358 void 359 netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si) 360 { 361 362 memset(si32, 0, sizeof (*si32)); 363 netbsd32_ksi_to_ksi32(&si32->_info, &si->_info); 364 } 365 366 void 367 getucontext32(struct lwp *l, ucontext32_t *ucp) 368 { 369 struct proc *p = l->l_proc; 370 371 KASSERT(mutex_owned(p->p_lock)); 372 373 ucp->uc_flags = 0; 374 ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink; 375 ucp->uc_sigmask = l->l_sigmask; 376 ucp->uc_flags |= _UC_SIGMASK; 377 378 /* 379 * The (unsupplied) definition of the `current execution stack' 380 * in the System V Interface Definition appears to allow returning 381 * the main context stack. 382 */ 383 if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) { 384 ucp->uc_stack.ss_sp = USRSTACK32; 385 ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize); 386 ucp->uc_stack.ss_flags = 0; /* XXX, def. is Very Fishy */ 387 } else { 388 /* Simply copy alternate signal execution stack. */ 389 ucp->uc_stack.ss_sp = 390 (uint32_t)(intptr_t)l->l_sigstk.ss_sp; 391 ucp->uc_stack.ss_size = l->l_sigstk.ss_size; 392 ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags; 393 } 394 ucp->uc_flags |= _UC_STACK; 395 mutex_exit(p->p_lock); 396 cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags); 397 mutex_enter(p->p_lock); 398 } 399 400 int 401 netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval) 402 { 403 /* { 404 syscallarg(netbsd32_ucontextp) ucp; 405 } */ 406 struct proc *p = l->l_proc; 407 ucontext32_t uc; 408 409 memset(&uc, 0, sizeof(uc)); 410 411 mutex_enter(p->p_lock); 412 getucontext32(l, &uc); 413 mutex_exit(p->p_lock); 414 415 return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t)); 416 } 417 418 int 419 setucontext32(struct lwp *l, const ucontext32_t *ucp) 420 { 421 struct proc *p = l->l_proc; 422 int error; 423 424 KASSERT(mutex_owned(p->p_lock)); 425 426 if ((ucp->uc_flags & _UC_SIGMASK) != 0) { 427 error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL); 428 if (error != 0) 429 return error; 430 } 431 432 mutex_exit(p->p_lock); 433 error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags); 434 mutex_enter(p->p_lock); 435 if (error != 0) 436 return (error); 437 438 l->l_ctxlink = (void *)(intptr_t)ucp->uc_link; 439 440 /* 441 * If there was stack information, update whether or not we are 442 * still running on an alternate signal stack. 443 */ 444 if ((ucp->uc_flags & _UC_STACK) != 0) { 445 if (ucp->uc_stack.ss_flags & SS_ONSTACK) 446 l->l_sigstk.ss_flags |= SS_ONSTACK; 447 else 448 l->l_sigstk.ss_flags &= ~SS_ONSTACK; 449 } 450 451 return 0; 452 } 453 454 /* ARGSUSED */ 455 int 456 netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval) 457 { 458 /* { 459 syscallarg(netbsd32_ucontextp) ucp; 460 } */ 461 ucontext32_t uc; 462 int error; 463 struct proc *p = l->l_proc; 464 465 error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc)); 466 if (error) 467 return (error); 468 if (!(uc.uc_flags & _UC_CPU)) 469 return (EINVAL); 470 mutex_enter(p->p_lock); 471 error = setucontext32(l, &uc); 472 mutex_exit(p->p_lock); 473 if (error) 474 return (error); 475 476 return (EJUSTRETURN); 477 } 478 479 static int 480 netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size) 481 { 482 const siginfo_t *info = src; 483 siginfo32_t info32; 484 485 netbsd32_si_to_si32(&info32, info); 486 487 return copyout(&info32, dst, sizeof(info32)); 488 } 489 490 static int 491 netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size) 492 { 493 struct timespec *ts = dst; 494 struct netbsd32_timespec ts32; 495 int error; 496 497 error = copyin(src, &ts32, sizeof(ts32)); 498 if (error) 499 return error; 500 501 netbsd32_to_timespec(&ts32, ts); 502 return 0; 503 } 504 505 static int 506 netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size) 507 { 508 const struct timespec *ts = src; 509 struct netbsd32_timespec ts32; 510 511 netbsd32_from_timespec(ts, &ts32); 512 513 return copyout(&ts32, dst, sizeof(ts32)); 514 } 515 516 int 517 netbsd32_____sigtimedwait50(struct lwp *l, const struct netbsd32_____sigtimedwait50_args *uap, register_t *retval) 518 { 519 /* { 520 syscallarg(netbsd32_sigsetp_t) set; 521 syscallarg(netbsd32_siginfop_t) info; 522 syscallarg(netbsd32_timespec50p_t) timeout; 523 } */ 524 struct sys_____sigtimedwait50_args ua; 525 526 NETBSD32TOP_UAP(set, const sigset_t); 527 NETBSD32TOP_UAP(info, siginfo_t); 528 NETBSD32TOP_UAP(timeout, struct timespec); 529 530 return sigtimedwait1(l, &ua, retval, 531 copyin, 532 netbsd32_sigtimedwait_put_info, 533 netbsd32_sigtimedwait_fetch_timeout, 534 netbsd32_sigtimedwait_put_timeout); 535 } 536 537 int 538 netbsd32_sigqueueinfo(struct lwp *l, 539 const struct netbsd32_sigqueueinfo_args *uap, register_t *retval) 540 { 541 /* { 542 syscallarg(pid_t) pid; 543 syscallarg(const netbsd32_siginfop_t) info; 544 } */ 545 struct __ksiginfo32 ksi32; 546 ksiginfo_t ksi; 547 int error; 548 549 if ((error = copyin(SCARG_P32(uap, info), &ksi32, 550 sizeof(ksi32))) != 0) 551 return error; 552 553 KSI_INIT(&ksi); 554 netbsd32_ksi32_to_ksi(&ksi.ksi_info, &ksi32); 555 556 return kill1(l, SCARG(uap, pid), &ksi, retval); 557 } 558 559 struct netbsd32_ktr_psig { 560 int signo; 561 netbsd32_pointer_t action; 562 sigset_t mask; 563 int code; 564 /* and optional siginfo_t */ 565 }; 566 567 #ifdef notyet 568 #ifdef KTRACE 569 void 570 netbsd32_ktrpsig(int sig, sig_t action, const sigset_t *mask, 571 const ksiginfo_t *ksi) 572 { 573 struct ktrace_entry *kte; 574 lwp_t *l = curlwp; 575 struct { 576 struct netbsd32_ktr_psig kp; 577 siginfo32_t si; 578 } *kbuf; 579 580 if (!KTRPOINT(l->l_proc, KTR_PSIG)) 581 return; 582 583 if (ktealloc(&kte, (void *)&kbuf, l, KTR_PSIG, sizeof(*kbuf))) 584 return; 585 586 kbuf->kp.signo = (char)sig; 587 NETBSD32PTR32(kbuf->kp.action, action); 588 kbuf->kp.mask = *mask; 589 590 if (ksi) { 591 kbuf->kp.code = KSI_TRAPCODE(ksi); 592 (void)memset(&kbuf->si, 0, sizeof(kbuf->si)); 593 netbsd32_ksi_to_ksi32(&kbuf->si._info, &ksi->ksi_info); 594 ktesethdrlen(kte, sizeof(*kbuf)); 595 } else { 596 kbuf->kp.code = 0; 597 ktesethdrlen(kte, sizeof(struct netbsd32_ktr_psig)); 598 } 599 600 ktraddentry(l, kte, KTA_WAITOK); 601 } 602 #endif 603 #endif 604
Indexes created Wed Sep 24 05:09:52 GMT 2025