linux32_signal.c revision 1.17.4.1
1 /* $NetBSD: linux32_signal.c,v 1.17.4.1 2020/01/21 19:19:17 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Emmanuel Dreyfus 17 * 4. The name of the author may not be used to endorse or promote 18 * products derived from this software without specific prior written 19 * permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: linux32_signal.c,v 1.17.4.1 2020/01/21 19:19:17 martin Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/ucred.h> 39 #include <sys/signalvar.h> 40 #include <sys/lwp.h> 41 #include <sys/time.h> 42 #include <sys/proc.h> 43 #include <sys/wait.h> 44 45 #include <compat/netbsd32/netbsd32.h> 46 47 #include <compat/linux/common/linux_types.h> 48 #include <compat/linux/common/linux_signal.h> 49 50 #include <compat/linux32/common/linux32_types.h> 51 #include <compat/linux32/common/linux32_signal.h> 52 #include <compat/linux32/common/linux32_siginfo.h> 53 #include <compat/linux32/linux32_syscallargs.h> 54 #include <compat/linux32/common/linux32_errno.h> 55 #include <compat/linux32/common/linux32_sched.h> 56 57 #define linux32_sigemptyset(s) memset((s), 0, sizeof(*(s))) 58 #define linux32_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX32__NSIG_BPW] \ 59 & (1 << ((n) - 1) % LINUX32__NSIG_BPW)) 60 #define linux32_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX32__NSIG_BPW] \ 61 |= (1 << ((n) - 1) % LINUX32__NSIG_BPW)) 62 63 extern const int native_to_linux32_signo[]; 64 extern const int linux32_to_native_signo[]; 65 66 #ifdef DEBUG_LINUX 67 #define DPRINTF(a) uprintf a 68 #else 69 #define DPRINTF(a) 70 #endif 71 72 void 73 linux32_to_native_sigset(sigset_t *bss, const linux32_sigset_t *lss) 74 { 75 int i, newsig; 76 77 sigemptyset(bss); 78 for (i = 1; i < LINUX32__NSIG; i++) { 79 if (linux32_sigismember(lss, i)) { 80 newsig = linux32_to_native_signo[i]; 81 if (newsig) 82 sigaddset(bss, newsig); 83 } 84 } 85 } 86 87 void 88 native_to_linux32_sigset(linux32_sigset_t *lss, const sigset_t *bss) 89 { 90 int i, newsig; 91 92 linux32_sigemptyset(lss); 93 for (i = 1; i < NSIG; i++) { 94 if (sigismember(bss, i)) { 95 newsig = native_to_linux32_signo[i]; 96 if (newsig) 97 linux32_sigaddset(lss, newsig); 98 } 99 } 100 } 101 102 void 103 native_to_linux32_siginfo(linux32_siginfo_t *lsi, const struct _ksiginfo *ksi) 104 { 105 memset(lsi, 0, sizeof(*lsi)); 106 107 lsi->lsi_signo = native_to_linux32_signo[ksi->_signo]; 108 lsi->lsi_errno = native_to_linux32_errno[ksi->_errno]; 109 lsi->lsi_code = native_to_linux32_si_code(ksi->_code); 110 111 switch (ksi->_code) { 112 case SI_NOINFO: 113 break; 114 115 case SI_USER: 116 lsi->lsi_pid = ksi->_reason._rt._pid; 117 lsi->lsi_uid = ksi->_reason._rt._uid; 118 if (lsi->lsi_signo == LINUX_SIGALRM || 119 lsi->lsi_signo >= LINUX_SIGRTMIN) 120 NETBSD32PTR32(lsi->lsi_value.sival_ptr, 121 ksi->_reason._rt._value.sival_ptr); 122 break; 123 124 case SI_TIMER: 125 case SI_QUEUE: 126 lsi->lsi_uid = ksi->_reason._rt._uid; 127 lsi->lsi_uid = ksi->_reason._rt._uid; 128 NETBSD32PTR32(lsi->lsi_value.sival_ptr, 129 ksi->_reason._rt._value.sival_ptr); 130 break; 131 132 case SI_ASYNCIO: 133 case SI_MESGQ: 134 NETBSD32PTR32(lsi->lsi_value.sival_ptr, 135 ksi->_reason._rt._value.sival_ptr); 136 break; 137 138 default: 139 switch (ksi->_signo) { 140 case SIGCHLD: 141 lsi->lsi_uid = ksi->_reason._child._uid; 142 lsi->lsi_pid = ksi->_reason._child._pid; 143 lsi->lsi_status = native_to_linux32_si_status( 144 ksi->_code, ksi->_reason._child._status); 145 lsi->lsi_utime = ksi->_reason._child._utime; 146 lsi->lsi_stime = ksi->_reason._child._stime; 147 break; 148 149 case SIGILL: 150 case SIGFPE: 151 case SIGSEGV: 152 case SIGBUS: 153 case SIGTRAP: 154 NETBSD32PTR32(lsi->lsi_addr, ksi->_reason._fault._addr); 155 break; 156 157 case SIGIO: 158 lsi->lsi_fd = ksi->_reason._poll._fd; 159 lsi->lsi_band = ksi->_reason._poll._band; 160 break; 161 default: 162 break; 163 } 164 } 165 } 166 167 unsigned int 168 native_to_linux32_sigflags(const int bsf) 169 { 170 unsigned int lsf = 0; 171 if ((bsf & SA_NOCLDSTOP) != 0) 172 lsf |= LINUX32_SA_NOCLDSTOP; 173 if ((bsf & SA_NOCLDWAIT) != 0) 174 lsf |= LINUX32_SA_NOCLDWAIT; 175 if ((bsf & SA_ONSTACK) != 0) 176 lsf |= LINUX32_SA_ONSTACK; 177 if ((bsf & SA_RESTART) != 0) 178 lsf |= LINUX32_SA_RESTART; 179 if ((bsf & SA_NODEFER) != 0) 180 lsf |= LINUX32_SA_NOMASK; 181 if ((bsf & SA_RESETHAND) != 0) 182 lsf |= LINUX32_SA_ONESHOT; 183 if ((bsf & SA_SIGINFO) != 0) 184 lsf |= LINUX32_SA_SIGINFO; 185 return lsf; 186 } 187 188 int 189 linux32_to_native_sigflags(const unsigned long lsf) 190 { 191 int bsf = 0; 192 if ((lsf & LINUX32_SA_NOCLDSTOP) != 0) 193 bsf |= SA_NOCLDSTOP; 194 if ((lsf & LINUX32_SA_NOCLDWAIT) != 0) 195 bsf |= SA_NOCLDWAIT; 196 if ((lsf & LINUX32_SA_ONSTACK) != 0) 197 bsf |= SA_ONSTACK; 198 if ((lsf & LINUX32_SA_RESTART) != 0) 199 bsf |= SA_RESTART; 200 if ((lsf & LINUX32_SA_ONESHOT) != 0) 201 bsf |= SA_RESETHAND; 202 if ((lsf & LINUX32_SA_NOMASK) != 0) 203 bsf |= SA_NODEFER; 204 if ((lsf & LINUX32_SA_SIGINFO) != 0) 205 bsf |= SA_SIGINFO; 206 if ((lsf & ~LINUX32_SA_ALLBITS) != 0) { 207 #ifdef DEBUG_LINUX 208 printf("linux32_old_to_native_sigflags: " 209 "%lx extra bits ignored\n", lsf); 210 #endif 211 } 212 return bsf; 213 } 214 215 void 216 linux32_to_native_sigaction(struct sigaction *bsa, const struct linux32_sigaction *lsa) 217 { 218 bsa->sa_handler = NETBSD32PTR64(lsa->linux_sa_handler); 219 linux32_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 220 bsa->sa_flags = linux32_to_native_sigflags(lsa->linux_sa_flags); 221 } 222 223 void 224 native_to_linux32_sigaction(struct linux32_sigaction *lsa, const struct sigaction *bsa) 225 { 226 NETBSD32PTR32(lsa->linux_sa_handler, bsa->sa_handler); 227 native_to_linux32_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 228 lsa->linux_sa_flags = native_to_linux32_sigflags(bsa->sa_flags); 229 NETBSD32PTR32(lsa->linux_sa_restorer, NULL); 230 } 231 232 void 233 native_to_linux32_sigaltstack(struct linux32_sigaltstack *lss, const struct sigaltstack *bss) 234 { 235 memset(lss, 0, sizeof(*lss)); 236 NETBSD32PTR32(lss->ss_sp, bss->ss_sp); 237 lss->ss_size = bss->ss_size; 238 if (bss->ss_flags & SS_ONSTACK) 239 lss->ss_flags = LINUX32_SS_ONSTACK; 240 else if (bss->ss_flags & SS_DISABLE) 241 lss->ss_flags = LINUX32_SS_DISABLE; 242 else 243 lss->ss_flags = 0; 244 } 245 246 247 void 248 native_to_linux32_old_sigset(linux32_old_sigset_t *lss, const sigset_t *bss) 249 { 250 linux32_sigset_t lsnew; 251 252 native_to_linux32_sigset(&lsnew, bss); 253 254 /* convert new sigset to old sigset */ 255 *lss = lsnew.sig[0]; 256 } 257 258 void 259 linux32_old_to_native_sigset(sigset_t *bss, const linux32_old_sigset_t *lss) 260 { 261 linux32_sigset_t ls; 262 263 memset(&ls, 0, sizeof(ls)); 264 ls.sig[0] = *lss; 265 266 linux32_to_native_sigset(bss, &ls); 267 } 268 269 int 270 linux32_sys_rt_sigaction(struct lwp *l, const struct linux32_sys_rt_sigaction_args *uap, register_t *retval) 271 { 272 /* { 273 syscallarg(int) signum; 274 syscallarg(const linux32_sigactionp_t) nsa; 275 syscallarg(linux32_sigactionp_t) osa; 276 syscallarg(netbsd32_size_t) sigsetsize; 277 } */ 278 struct linux32_sigaction nls32; 279 struct linux32_sigaction ols32; 280 struct sigaction ns; 281 struct sigaction os; 282 int error; 283 int sig; 284 int vers = 0; 285 void *tramp = NULL; 286 287 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) { 288 DPRINTF(("rt_sigaction: Inconsistent sigsetsize %u %zu\n", 289 SCARG(uap, sigsetsize), sizeof(linux32_sigset_t))); 290 return EINVAL; 291 } 292 293 if (SCARG_P32(uap, nsa) != NULL) { 294 if ((error = copyin(SCARG_P32(uap, nsa), 295 &nls32, sizeof(nls32))) != 0) { 296 DPRINTF(("rt_sigaction: Copyin %d\n", error)); 297 return error; 298 } 299 linux32_to_native_sigaction(&ns, &nls32); 300 } 301 302 sig = SCARG(uap, signum); 303 if (sig < 0 || sig >= LINUX32__NSIG) { 304 DPRINTF(("rt_sigaction: Bad signal number %d %d\n", 305 sig, LINUX32__NSIG)); 306 return EINVAL; 307 } 308 if (sig > 0 && !linux32_to_native_signo[sig]) { 309 /* unknown signal... */ 310 os.sa_handler = SIG_IGN; 311 sigemptyset(&os.sa_mask); 312 os.sa_flags = 0; 313 } else { 314 if ((error = sigaction1(l, 315 linux32_to_native_signo[sig], 316 SCARG_P32(uap, nsa) ? &ns : NULL, 317 SCARG_P32(uap, osa) ? &os : NULL, 318 tramp, vers)) != 0) { 319 DPRINTF(("rt_sigaction: sigaction %d\n", error)); 320 return error; 321 } 322 } 323 324 if (SCARG_P32(uap, osa) != NULL) { 325 native_to_linux32_sigaction(&ols32, &os); 326 327 if ((error = copyout(&ols32, SCARG_P32(uap, osa), 328 sizeof(ols32))) != 0) { 329 DPRINTF(("rt_sigaction: Copyout %d\n", error)); 330 return error; 331 } 332 } 333 334 return 0; 335 } 336 337 int 338 linux32_sys_rt_sigprocmask(struct lwp *l, const struct linux32_sys_rt_sigprocmask_args *uap, register_t *retval) 339 { 340 /* { 341 syscallarg(int) how; 342 syscallarg(const linux32_sigsetp_t) set; 343 syscallarg(linux32_sigsetp_t) oset; 344 syscallarg(netbsd32_size_t) sigsetsize; 345 } */ 346 struct proc *p = l->l_proc; 347 linux32_sigset_t nls32, ols32; 348 sigset_t ns, os; 349 int error; 350 int how; 351 352 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) 353 return EINVAL; 354 355 switch (SCARG(uap, how)) { 356 case LINUX32_SIG_BLOCK: 357 how = SIG_BLOCK; 358 break; 359 case LINUX32_SIG_UNBLOCK: 360 how = SIG_UNBLOCK; 361 break; 362 case LINUX32_SIG_SETMASK: 363 how = SIG_SETMASK; 364 break; 365 default: 366 return EINVAL; 367 break; 368 } 369 370 if (SCARG_P32(uap, set) != NULL) { 371 if ((error = copyin(SCARG_P32(uap, set), 372 &nls32, sizeof(nls32))) != 0) 373 return error; 374 linux32_to_native_sigset(&ns, &nls32); 375 } 376 377 mutex_enter(p->p_lock); 378 error = sigprocmask1(l, how, 379 SCARG_P32(uap, set) ? &ns : NULL, 380 SCARG_P32(uap, oset) ? &os : NULL); 381 mutex_exit(p->p_lock); 382 383 if (error != 0) 384 return error; 385 386 if (SCARG_P32(uap, oset) != NULL) { 387 native_to_linux32_sigset(&ols32, &os); 388 if ((error = copyout(&ols32, 389 SCARG_P32(uap, oset), sizeof(ols32))) != 0) 390 return error; 391 } 392 393 return 0; 394 } 395 396 int 397 linux32_sys_kill(struct lwp *l, const struct linux32_sys_kill_args *uap, register_t *retval) 398 { 399 /* { 400 syscallarg(int) pid; 401 syscallarg(int) signum; 402 } */ 403 404 struct sys_kill_args ka; 405 int sig; 406 407 SCARG(&ka, pid) = SCARG(uap, pid); 408 sig = SCARG(uap, signum); 409 if (sig < 0 || sig >= LINUX32__NSIG) 410 return (EINVAL); 411 SCARG(&ka, signum) = linux32_to_native_signo[sig]; 412 return sys_kill(l, &ka, retval); 413 } 414 415 int 416 linux32_sys_rt_sigsuspend(struct lwp *l, const struct linux32_sys_rt_sigsuspend_args *uap, register_t *retval) 417 { 418 /* { 419 syscallarg(linux32_sigsetp_t) unewset; 420 syscallarg(netbsd32_size_t) sigsetsize; 421 } */ 422 linux32_sigset_t lss; 423 sigset_t bss; 424 int error; 425 426 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) 427 return EINVAL; 428 429 if ((error = copyin(SCARG_P32(uap, unewset), 430 &lss, sizeof(linux32_sigset_t))) != 0) 431 return error; 432 433 linux32_to_native_sigset(&bss, &lss); 434 435 return sigsuspend1(l, &bss); 436 } 437 438 static int 439 fetchss(const void *u, void *s, size_t len) 440 { 441 int error; 442 linux32_sigset_t lss; 443 444 if ((error = copyin(u, &lss, sizeof(lss))) != 0) 445 return error; 446 447 linux32_to_native_sigset(s, &lss); 448 return 0; 449 } 450 451 static int 452 fetchts(const void *u, void *s, size_t len) 453 { 454 int error; 455 struct linux32_timespec lts; 456 457 if ((error = copyin(u, <s, sizeof(lts))) != 0) 458 return error; 459 460 linux32_to_native_timespec(s, <s); 461 return 0; 462 } 463 464 static int 465 fakestorets(const void *u, void *s, size_t len) 466 { 467 /* Do nothing, sigtimedwait does not alter timeout like ours */ 468 return 0; 469 } 470 471 static int 472 storeinfo(const void *s, void *u, size_t len) 473 { 474 linux32_siginfo_t lsi; 475 476 477 native_to_linux32_siginfo(&lsi, &((const siginfo_t *)s)->_info); 478 return copyout(&lsi, u, sizeof(lsi)); 479 } 480 481 int 482 linux32_sys_rt_sigtimedwait(struct lwp *l, 483 const struct linux32_sys_rt_sigtimedwait_args *uap, register_t *retval) 484 { 485 /* { 486 syscallarg(const linux32_sigset_t *) set; 487 syscallarg(linux32_siginfo_t *) info); 488 syscallarg(const struct linux32_timespec *) timeout; 489 } */ 490 struct sys_____sigtimedwait50_args ap; 491 492 SCARG(&ap, set) = SCARG_P32(uap, set); 493 SCARG(&ap, info) = SCARG_P32(uap, info); 494 SCARG(&ap, timeout) = SCARG_P32(uap, timeout); 495 496 return sigtimedwait1(l, &ap, 497 retval, fetchss, storeinfo, fetchts, fakestorets); 498 } 499 500 int 501 linux32_sys_signal(struct lwp *l, const struct linux32_sys_signal_args *uap, register_t *retval) 502 { 503 /* { 504 syscallarg(int) signum; 505 syscallarg(linux32_handler_t) handler; 506 } */ 507 struct sigaction nbsa, obsa; 508 int error, sig; 509 510 *retval = -1; 511 512 sig = SCARG(uap, signum); 513 if (sig < 0 || sig >= LINUX32__NSIG) 514 return EINVAL; 515 516 nbsa.sa_handler = SCARG_P32(uap, handler); 517 sigemptyset(&nbsa.sa_mask); 518 nbsa.sa_flags = SA_RESETHAND | SA_NODEFER; 519 520 if ((error = sigaction1(l, linux32_to_native_signo[sig], 521 &nbsa, &obsa, NULL, 0)) != 0) 522 return error; 523 524 *retval = (int)(long)obsa.sa_handler; 525 return 0; 526 } 527 528 int 529 linux32_sys_rt_sigpending(struct lwp *l, const struct linux32_sys_rt_sigpending_args *uap, register_t *retval) 530 { 531 /* { 532 syscallarg(linux32_sigsetp_t) set; 533 syscallarg(netbsd32_size_t) sigsetsize; 534 } */ 535 sigset_t bss; 536 linux32_sigset_t lss; 537 538 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) 539 return EINVAL; 540 541 sigpending1(l, &bss); 542 native_to_linux32_sigset(&lss, &bss); 543 return copyout(&lss, SCARG_P32(uap, set), sizeof(lss)); 544 } 545 546 int 547 linux32_sys_siggetmask(struct lwp *l, const void *v, register_t *retval) 548 { 549 struct proc *p = l->l_proc; 550 sigset_t bss; 551 linux32_old_sigset_t lss; 552 int error; 553 554 mutex_enter(p->p_lock); 555 error = sigprocmask1(l, SIG_SETMASK, 0, &bss); 556 mutex_exit(p->p_lock); 557 if (error) 558 return error; 559 native_to_linux32_old_sigset(&lss, &bss); 560 *retval = lss; 561 return 0; 562 } 563 564 int 565 linux32_sys_sigsetmask(struct lwp *l, const struct linux32_sys_sigsetmask_args *uap, register_t *retval) 566 { 567 /* { 568 syscallarg(linux32_old_sigset_t) mask; 569 } */ 570 sigset_t nbss, obss; 571 linux32_old_sigset_t nlss, olss; 572 struct proc *p = l->l_proc; 573 int error; 574 575 nlss = SCARG(uap, mask); 576 linux32_old_to_native_sigset(&nbss, &nlss); 577 mutex_enter(p->p_lock); 578 error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss); 579 mutex_exit(p->p_lock); 580 if (error) 581 return error; 582 native_to_linux32_old_sigset(&olss, &obss); 583 *retval = olss; 584 return 0; 585 } 586 587 int 588 linux32_sys_rt_queueinfo(struct lwp *l, const struct linux32_sys_rt_queueinfo_args *uap, register_t *retval) 589 { 590 /* 591 syscallarg(int) pid; 592 syscallarg(int) sig; 593 syscallarg(linux32_siginfop_t) uinfo; 594 */ 595 int error; 596 linux32_siginfo_t info; 597 598 error = copyin(SCARG_P32(uap, uinfo), &info, sizeof(info)); 599 if (error) 600 return error; 601 if (info.lsi_code >= 0) 602 return EPERM; 603 604 /* XXX To really implement this we need to */ 605 /* XXX keep a list of queued signals somewhere. */ 606 return linux32_sys_kill(l, (const void *)uap, retval); 607 } 608 609 int 610 native_to_linux32_si_code(int code) 611 { 612 int si_codes[] = { 613 LINUX32_SI_USER, LINUX32_SI_QUEUE, LINUX32_SI_TIMER, 614 LINUX32_SI_ASYNCIO, LINUX32_SI_MESGQ, LINUX32_SI_TKILL /* SI_LWP */ 615 }; 616 617 if (code <= 0 && -code < __arraycount(si_codes)) 618 return si_codes[-code]; 619 620 return code; 621 } 622 623 int 624 native_to_linux32_si_status(int code, int status) 625 { 626 int sts; 627 628 switch (code) { 629 case CLD_CONTINUED: 630 sts = LINUX_SIGCONT; 631 break; 632 case CLD_EXITED: 633 sts = WEXITSTATUS(status); 634 break; 635 case CLD_STOPPED: 636 case CLD_TRAPPED: 637 case CLD_DUMPED: 638 case CLD_KILLED: 639 default: 640 sts = native_to_linux32_signo[WTERMSIG(status)]; 641 break; 642 } 643 644 return sts; 645 } 646
Indexes created Fri Oct 03 02:09:57 GMT 2025