netbsd32_signal.c revision 1.48
1 /* $NetBSD: netbsd32_signal.c,v 1.48 2019/11/18 10:14:52 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 1.48 2019/11/18 10:14:52 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 switch (si32->_signo) { 199 case SIGILL: 200 case SIGFPE: 201 case SIGBUS: 202 case SIGSEGV: 203 fill_fault: 204 si->_reason._fault._addr = 205 NETBSD32IPTR64(si32->_reason._fault._addr); 206 si->_reason._fault._trap = si32->_reason._fault._trap; 207 break; 208 case SIGTRAP: 209 switch (si32->_code) { 210 case TRAP_EXEC: 211 case TRAP_CHLD: 212 case TRAP_LWP: 213 si->_reason._ptrace_state._pe_report_event = 214 si32->_reason._ptrace_state._pe_report_event; 215 CTASSERT(sizeof(si->_reason._ptrace_state._option._pe_other_pid) == 216 sizeof(si->_reason._ptrace_state._option._pe_lwp)); 217 si->_reason._ptrace_state._option._pe_other_pid = 218 si32->_reason._ptrace_state._option._pe_other_pid; 219 break; 220 case TRAP_SCE: 221 case TRAP_SCX: 222 si->_reason._syscall._sysnum = 223 si32->_reason._syscall._sysnum; 224 si->_reason._syscall._retval[0] = 225 si32->_reason._syscall._retval[0]; 226 si->_reason._syscall._retval[1] = 227 si32->_reason._syscall._retval[1]; 228 si->_reason._syscall._error = 229 si32->_reason._syscall._error; 230 for (i = 0; 231 i < __arraycount(si->_reason._syscall._args); i++) 232 si->_reason._syscall._args[i] = 233 si32->_reason._syscall._args[i]; 234 break; 235 default: 236 goto fill_fault; 237 } 238 break; 239 case SIGALRM: 240 case SIGVTALRM: 241 case SIGPROF: 242 default: /* see sigqueue() and kill1() */ 243 si->_reason._rt._pid = si32->_reason._rt._pid; 244 si->_reason._rt._uid = si32->_reason._rt._uid; 245 si->_reason._rt._value.sival_int = 246 si32->_reason._rt._value.sival_int; 247 break; 248 case SIGURG: 249 case SIGIO: 250 si->_reason._poll._band = si32->_reason._poll._band; 251 si->_reason._poll._fd = si32->_reason._poll._fd; 252 break; 253 case SIGCHLD: 254 si->_reason._child._pid = si32->_reason._child._pid; 255 si->_reason._child._uid = si32->_reason._child._uid; 256 si->_reason._child._status = si32->_reason._child._status; 257 si->_reason._child._utime = si32->_reason._child._utime; 258 si->_reason._child._stime = si32->_reason._child._stime; 259 break; 260 } 261 } 262 263 void 264 netbsd32_si32_to_si(siginfo_t *si, const siginfo32_t *si32) 265 { 266 267 memset(si, 0, sizeof (*si)); 268 netbsd32_ksi32_to_ksi(&si->_info, &si32->_info); 269 } 270 271 static void 272 netbsd32_ksi_to_ksi32(struct __ksiginfo32 *si32, const struct _ksiginfo *si) 273 { 274 size_t i; 275 276 memset(si32, 0, sizeof (*si32)); 277 si32->_signo = si->_signo; 278 si32->_code = si->_code; 279 si32->_errno = si->_errno; 280 281 switch (si->_signo) { 282 case SIGILL: 283 case SIGFPE: 284 case SIGBUS: 285 case SIGSEGV: 286 fill_fault: 287 si32->_reason._fault._addr = 288 NETBSD32PTR32I(si->_reason._fault._addr); 289 si32->_reason._fault._trap = si->_reason._fault._trap; 290 break; 291 case SIGTRAP: 292 switch (si->_code) { 293 case TRAP_EXEC: 294 case TRAP_CHLD: 295 case TRAP_LWP: 296 si32->_reason._ptrace_state._pe_report_event = 297 si->_reason._ptrace_state._pe_report_event; 298 CTASSERT(sizeof(si32->_reason._ptrace_state._option._pe_other_pid) == 299 sizeof(si32->_reason._ptrace_state._option._pe_lwp)); 300 si32->_reason._ptrace_state._option._pe_other_pid = 301 si->_reason._ptrace_state._option._pe_other_pid; 302 break; 303 case TRAP_SCE: 304 case TRAP_SCX: 305 si32->_reason._syscall._sysnum = 306 si->_reason._syscall._sysnum; 307 si32->_reason._syscall._retval[0] = 308 si->_reason._syscall._retval[0]; 309 si32->_reason._syscall._retval[1] = 310 si->_reason._syscall._retval[1]; 311 si32->_reason._syscall._error = 312 si->_reason._syscall._error; 313 for (i = 0; 314 i < __arraycount(si->_reason._syscall._args); i++) 315 si32->_reason._syscall._args[i] = 316 si->_reason._syscall._args[i]; 317 break; 318 default: 319 goto fill_fault; 320 } 321 break; 322 case SIGALRM: 323 case SIGVTALRM: 324 case SIGPROF: 325 default: /* see sigqueue() and kill1() */ 326 si32->_reason._rt._pid = si->_reason._rt._pid; 327 si32->_reason._rt._uid = si->_reason._rt._uid; 328 si32->_reason._rt._value.sival_int = 329 si->_reason._rt._value.sival_int; 330 break; 331 case SIGURG: 332 case SIGIO: 333 si32->_reason._poll._band = si->_reason._poll._band; 334 si32->_reason._poll._fd = si->_reason._poll._fd; 335 break; 336 case SIGCHLD: 337 si32->_reason._child._pid = si->_reason._child._pid; 338 si32->_reason._child._uid = si->_reason._child._uid; 339 si32->_reason._child._status = si->_reason._child._status; 340 si32->_reason._child._utime = si->_reason._child._utime; 341 si32->_reason._child._stime = si->_reason._child._stime; 342 break; 343 } 344 } 345 346 void 347 netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si) 348 { 349 350 memset(si32, 0, sizeof (*si32)); 351 netbsd32_ksi_to_ksi32(&si32->_info, &si->_info); 352 } 353 354 void 355 getucontext32(struct lwp *l, ucontext32_t *ucp) 356 { 357 struct proc *p = l->l_proc; 358 359 KASSERT(mutex_owned(p->p_lock)); 360 361 ucp->uc_flags = 0; 362 ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink; 363 ucp->uc_sigmask = l->l_sigmask; 364 ucp->uc_flags |= _UC_SIGMASK; 365 366 /* 367 * The (unsupplied) definition of the `current execution stack' 368 * in the System V Interface Definition appears to allow returning 369 * the main context stack. 370 */ 371 if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) { 372 ucp->uc_stack.ss_sp = USRSTACK32; 373 ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize); 374 ucp->uc_stack.ss_flags = 0; /* XXX, def. is Very Fishy */ 375 } else { 376 /* Simply copy alternate signal execution stack. */ 377 ucp->uc_stack.ss_sp = 378 (uint32_t)(intptr_t)l->l_sigstk.ss_sp; 379 ucp->uc_stack.ss_size = l->l_sigstk.ss_size; 380 ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags; 381 } 382 ucp->uc_flags |= _UC_STACK; 383 mutex_exit(p->p_lock); 384 cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags); 385 mutex_enter(p->p_lock); 386 } 387 388 int 389 netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval) 390 { 391 /* { 392 syscallarg(netbsd32_ucontextp) ucp; 393 } */ 394 struct proc *p = l->l_proc; 395 ucontext32_t uc; 396 397 memset(&uc, 0, sizeof(uc)); 398 399 mutex_enter(p->p_lock); 400 getucontext32(l, &uc); 401 mutex_exit(p->p_lock); 402 403 return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t)); 404 } 405 406 int 407 setucontext32(struct lwp *l, const ucontext32_t *ucp) 408 { 409 struct proc *p = l->l_proc; 410 int error; 411 412 KASSERT(mutex_owned(p->p_lock)); 413 414 if ((ucp->uc_flags & _UC_SIGMASK) != 0) { 415 error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL); 416 if (error != 0) 417 return error; 418 } 419 420 mutex_exit(p->p_lock); 421 error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags); 422 mutex_enter(p->p_lock); 423 if (error != 0) 424 return (error); 425 426 l->l_ctxlink = (void *)(intptr_t)ucp->uc_link; 427 428 /* 429 * If there was stack information, update whether or not we are 430 * still running on an alternate signal stack. 431 */ 432 if ((ucp->uc_flags & _UC_STACK) != 0) { 433 if (ucp->uc_stack.ss_flags & SS_ONSTACK) 434 l->l_sigstk.ss_flags |= SS_ONSTACK; 435 else 436 l->l_sigstk.ss_flags &= ~SS_ONSTACK; 437 } 438 439 return 0; 440 } 441 442 /* ARGSUSED */ 443 int 444 netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval) 445 { 446 /* { 447 syscallarg(netbsd32_ucontextp) ucp; 448 } */ 449 ucontext32_t uc; 450 int error; 451 struct proc *p = l->l_proc; 452 453 error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc)); 454 if (error) 455 return (error); 456 if (!(uc.uc_flags & _UC_CPU)) 457 return (EINVAL); 458 mutex_enter(p->p_lock); 459 error = setucontext32(l, &uc); 460 mutex_exit(p->p_lock); 461 if (error) 462 return (error); 463 464 return (EJUSTRETURN); 465 } 466 467 static int 468 netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size) 469 { 470 const siginfo_t *info = src; 471 siginfo32_t info32; 472 473 netbsd32_si_to_si32(&info32, info); 474 475 return copyout(&info32, dst, sizeof(info32)); 476 } 477 478 static int 479 netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size) 480 { 481 struct timespec *ts = dst; 482 struct netbsd32_timespec ts32; 483 int error; 484 485 error = copyin(src, &ts32, sizeof(ts32)); 486 if (error) 487 return error; 488 489 netbsd32_to_timespec(&ts32, ts); 490 return 0; 491 } 492 493 static int 494 netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size) 495 { 496 const struct timespec *ts = src; 497 struct netbsd32_timespec ts32; 498 499 netbsd32_from_timespec(ts, &ts32); 500 501 return copyout(&ts32, dst, sizeof(ts32)); 502 } 503 504 int 505 netbsd32_____sigtimedwait50(struct lwp *l, const struct netbsd32_____sigtimedwait50_args *uap, register_t *retval) 506 { 507 /* { 508 syscallarg(netbsd32_sigsetp_t) set; 509 syscallarg(netbsd32_siginfop_t) info; 510 syscallarg(netbsd32_timespec50p_t) timeout; 511 } */ 512 struct sys_____sigtimedwait50_args ua; 513 514 NETBSD32TOP_UAP(set, const sigset_t); 515 NETBSD32TOP_UAP(info, siginfo_t); 516 NETBSD32TOP_UAP(timeout, struct timespec); 517 518 return sigtimedwait1(l, &ua, retval, 519 copyin, 520 netbsd32_sigtimedwait_put_info, 521 netbsd32_sigtimedwait_fetch_timeout, 522 netbsd32_sigtimedwait_put_timeout); 523 } 524 525 int 526 netbsd32_sigqueueinfo(struct lwp *l, 527 const struct netbsd32_sigqueueinfo_args *uap, register_t *retval) 528 { 529 /* { 530 syscallarg(pid_t) pid; 531 syscallarg(const netbsd32_siginfop_t) info; 532 } */ 533 struct __ksiginfo32 ksi32; 534 ksiginfo_t ksi; 535 int error; 536 537 if ((error = copyin(SCARG_P32(uap, info), &ksi32, 538 sizeof(ksi32))) != 0) 539 return error; 540 541 KSI_INIT(&ksi); 542 netbsd32_ksi32_to_ksi(&ksi.ksi_info, &ksi32); 543 544 return kill1(l, SCARG(uap, pid), &ksi, retval); 545 } 546 547 struct netbsd32_ktr_psig { 548 int signo; 549 netbsd32_pointer_t action; 550 sigset_t mask; 551 int code; 552 /* and optional siginfo_t */ 553 }; 554 555 #ifdef notyet 556 #ifdef KTRACE 557 void 558 netbsd32_ktrpsig(int sig, sig_t action, const sigset_t *mask, 559 const ksiginfo_t *ksi) 560 { 561 struct ktrace_entry *kte; 562 lwp_t *l = curlwp; 563 struct { 564 struct netbsd32_ktr_psig kp; 565 siginfo32_t si; 566 } *kbuf; 567 568 if (!KTRPOINT(l->l_proc, KTR_PSIG)) 569 return; 570 571 if (ktealloc(&kte, (void *)&kbuf, l, KTR_PSIG, sizeof(*kbuf))) 572 return; 573 574 kbuf->kp.signo = (char)sig; 575 NETBSD32PTR32(kbuf->kp.action, action); 576 kbuf->kp.mask = *mask; 577 578 if (ksi) { 579 kbuf->kp.code = KSI_TRAPCODE(ksi); 580 (void)memset(&kbuf->si, 0, sizeof(kbuf->si)); 581 netbsd32_ksi_to_ksi32(&kbuf->si._info, &ksi->ksi_info); 582 ktesethdrlen(kte, sizeof(*kbuf)); 583 } else { 584 kbuf->kp.code = 0; 585 ktesethdrlen(kte, sizeof(struct netbsd32_ktr_psig)); 586 } 587 588 ktraddentry(l, kte, KTA_WAITOK); 589 } 590 #endif 591 #endif 592
Indexes created Mon Sep 22 13:09:51 GMT 2025