linux32_signal.c revision 1.16.2.1
1 /* $NetBSD: linux32_signal.c,v 1.16.2.1 2014/08/20 00:03:33 tls 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 1.16.2.1 2014/08/20 00:03:33 tls 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 NETBSD32PTR32(lss->ss_sp, bss->ss_sp); 236 lss->ss_size = bss->ss_size; 237 if (bss->ss_flags & SS_ONSTACK) 238 lss->ss_flags = LINUX32_SS_ONSTACK; 239 else if (bss->ss_flags & SS_DISABLE) 240 lss->ss_flags = LINUX32_SS_DISABLE; 241 else 242 lss->ss_flags = 0; 243 } 244 245 246 void 247 native_to_linux32_old_sigset(linux32_old_sigset_t *lss, const sigset_t *bss) 248 { 249 linux32_sigset_t lsnew; 250 251 native_to_linux32_sigset(&lsnew, bss); 252 253 /* convert new sigset to old sigset */ 254 *lss = lsnew.sig[0]; 255 } 256 257 void 258 linux32_old_to_native_sigset(sigset_t *bss, const linux32_old_sigset_t *lss) 259 { 260 linux32_sigset_t ls; 261 262 memset(&ls, 0, sizeof(ls)); 263 ls.sig[0] = *lss; 264 265 linux32_to_native_sigset(bss, &ls); 266 } 267 268 int 269 linux32_sys_rt_sigaction(struct lwp *l, const struct linux32_sys_rt_sigaction_args *uap, register_t *retval) 270 { 271 /* { 272 syscallarg(int) signum; 273 syscallarg(const linux32_sigactionp_t) nsa; 274 syscallarg(linux32_sigactionp_t) osa; 275 syscallarg(netbsd32_size_t) sigsetsize; 276 } */ 277 struct linux32_sigaction nls32; 278 struct linux32_sigaction ols32; 279 struct sigaction ns; 280 struct sigaction os; 281 int error; 282 int sig; 283 int vers = 0; 284 void *tramp = NULL; 285 286 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) { 287 DPRINTF(("rt_sigaction: Inconsistent sigsetsize %u %zu\n", 288 SCARG(uap, sigsetsize), sizeof(linux32_sigset_t))); 289 return EINVAL; 290 } 291 292 if (SCARG_P32(uap, nsa) != NULL) { 293 if ((error = copyin(SCARG_P32(uap, nsa), 294 &nls32, sizeof(nls32))) != 0) { 295 DPRINTF(("rt_sigaction: Copyin %d\n", error)); 296 return error; 297 } 298 linux32_to_native_sigaction(&ns, &nls32); 299 } 300 301 sig = SCARG(uap, signum); 302 if (sig < 0 || sig >= LINUX32__NSIG) { 303 DPRINTF(("rt_sigaction: Bad signal number %d %d\n", 304 sig, LINUX32__NSIG)); 305 return EINVAL; 306 } 307 if (sig > 0 && !linux32_to_native_signo[sig]) { 308 /* unknown signal... */ 309 os.sa_handler = SIG_IGN; 310 sigemptyset(&os.sa_mask); 311 os.sa_flags = 0; 312 } else { 313 if ((error = sigaction1(l, 314 linux32_to_native_signo[sig], 315 SCARG_P32(uap, nsa) ? &ns : NULL, 316 SCARG_P32(uap, osa) ? &os : NULL, 317 tramp, vers)) != 0) { 318 DPRINTF(("rt_sigaction: sigaction %d\n", error)); 319 return error; 320 } 321 } 322 323 if (SCARG_P32(uap, osa) != NULL) { 324 native_to_linux32_sigaction(&ols32, &os); 325 326 if ((error = copyout(&ols32, SCARG_P32(uap, osa), 327 sizeof(ols32))) != 0) { 328 DPRINTF(("rt_sigaction: Copyout %d\n", error)); 329 return error; 330 } 331 } 332 333 return 0; 334 } 335 336 int 337 linux32_sys_rt_sigprocmask(struct lwp *l, const struct linux32_sys_rt_sigprocmask_args *uap, register_t *retval) 338 { 339 /* { 340 syscallarg(int) how; 341 syscallarg(const linux32_sigsetp_t) set; 342 syscallarg(linux32_sigsetp_t) oset; 343 syscallarg(netbsd32_size_t) sigsetsize; 344 } */ 345 struct proc *p = l->l_proc; 346 linux32_sigset_t nls32, ols32; 347 sigset_t ns, os; 348 int error; 349 int how; 350 351 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) 352 return EINVAL; 353 354 switch (SCARG(uap, how)) { 355 case LINUX32_SIG_BLOCK: 356 how = SIG_BLOCK; 357 break; 358 case LINUX32_SIG_UNBLOCK: 359 how = SIG_UNBLOCK; 360 break; 361 case LINUX32_SIG_SETMASK: 362 how = SIG_SETMASK; 363 break; 364 default: 365 return EINVAL; 366 break; 367 } 368 369 if (SCARG_P32(uap, set) != NULL) { 370 if ((error = copyin(SCARG_P32(uap, set), 371 &nls32, sizeof(nls32))) != 0) 372 return error; 373 linux32_to_native_sigset(&ns, &nls32); 374 } 375 376 mutex_enter(p->p_lock); 377 error = sigprocmask1(l, how, 378 SCARG_P32(uap, set) ? &ns : NULL, 379 SCARG_P32(uap, oset) ? &os : NULL); 380 mutex_exit(p->p_lock); 381 382 if (error != 0) 383 return error; 384 385 if (SCARG_P32(uap, oset) != NULL) { 386 native_to_linux32_sigset(&ols32, &os); 387 if ((error = copyout(&ols32, 388 SCARG_P32(uap, oset), sizeof(ols32))) != 0) 389 return error; 390 } 391 392 return 0; 393 } 394 395 int 396 linux32_sys_kill(struct lwp *l, const struct linux32_sys_kill_args *uap, register_t *retval) 397 { 398 /* { 399 syscallarg(int) pid; 400 syscallarg(int) signum; 401 } */ 402 403 struct sys_kill_args ka; 404 int sig; 405 406 SCARG(&ka, pid) = SCARG(uap, pid); 407 sig = SCARG(uap, signum); 408 if (sig < 0 || sig >= LINUX32__NSIG) 409 return (EINVAL); 410 SCARG(&ka, signum) = linux32_to_native_signo[sig]; 411 return sys_kill(l, &ka, retval); 412 } 413 414 int 415 linux32_sys_rt_sigsuspend(struct lwp *l, const struct linux32_sys_rt_sigsuspend_args *uap, register_t *retval) 416 { 417 /* { 418 syscallarg(linux32_sigsetp_t) unewset; 419 syscallarg(netbsd32_size_t) sigsetsize; 420 } */ 421 linux32_sigset_t lss; 422 sigset_t bss; 423 int error; 424 425 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) 426 return EINVAL; 427 428 if ((error = copyin(SCARG_P32(uap, unewset), 429 &lss, sizeof(linux32_sigset_t))) != 0) 430 return error; 431 432 linux32_to_native_sigset(&bss, &lss); 433 434 return sigsuspend1(l, &bss); 435 } 436 437 static int 438 fetchss(const void *u, void *s, size_t len) 439 { 440 int error; 441 linux32_sigset_t lss; 442 443 if ((error = copyin(u, &lss, sizeof(lss))) != 0) 444 return error; 445 446 linux32_to_native_sigset(s, &lss); 447 return 0; 448 } 449 450 static int 451 fetchts(const void *u, void *s, size_t len) 452 { 453 int error; 454 struct linux32_timespec lts; 455 456 if ((error = copyin(u, <s, sizeof(lts))) != 0) 457 return error; 458 459 linux32_to_native_timespec(s, <s); 460 return 0; 461 } 462 463 static int 464 fakestorets(const void *u, void *s, size_t len) 465 { 466 /* Do nothing, sigtimedwait does not alter timeout like ours */ 467 return 0; 468 } 469 470 static int 471 storeinfo(const void *s, void *u, size_t len) 472 { 473 linux32_siginfo_t lsi; 474 475 476 native_to_linux32_siginfo(&lsi, &((const siginfo_t *)s)->_info); 477 return copyout(&lsi, u, sizeof(lsi)); 478 } 479 480 int 481 linux32_sys_rt_sigtimedwait(struct lwp *l, 482 const struct linux32_sys_rt_sigtimedwait_args *uap, register_t *retval) 483 { 484 /* { 485 syscallarg(const linux32_sigset_t *) set; 486 syscallarg(linux32_siginfo_t *) info); 487 syscallarg(const struct linux32_timespec *) timeout; 488 } */ 489 struct sys_____sigtimedwait50_args ap; 490 491 SCARG(&ap, set) = SCARG_P32(uap, set); 492 SCARG(&ap, info) = SCARG_P32(uap, info); 493 SCARG(&ap, timeout) = SCARG_P32(uap, timeout); 494 495 return sigtimedwait1(l, &ap, 496 retval, fetchss, storeinfo, fetchts, fakestorets); 497 } 498 499 int 500 linux32_sys_signal(struct lwp *l, const struct linux32_sys_signal_args *uap, register_t *retval) 501 { 502 /* { 503 syscallarg(int) signum; 504 syscallarg(linux32_handler_t) handler; 505 } */ 506 struct sigaction nbsa, obsa; 507 int error, sig; 508 509 *retval = -1; 510 511 sig = SCARG(uap, signum); 512 if (sig < 0 || sig >= LINUX32__NSIG) 513 return EINVAL; 514 515 nbsa.sa_handler = SCARG_P32(uap, handler); 516 sigemptyset(&nbsa.sa_mask); 517 nbsa.sa_flags = SA_RESETHAND | SA_NODEFER; 518 519 if ((error = sigaction1(l, linux32_to_native_signo[sig], 520 &nbsa, &obsa, NULL, 0)) != 0) 521 return error; 522 523 *retval = (int)(long)obsa.sa_handler; 524 return 0; 525 } 526 527 int 528 linux32_sys_rt_sigpending(struct lwp *l, const struct linux32_sys_rt_sigpending_args *uap, register_t *retval) 529 { 530 /* { 531 syscallarg(linux32_sigsetp_t) set; 532 syscallarg(netbsd32_size_t) sigsetsize; 533 } */ 534 sigset_t bss; 535 linux32_sigset_t lss; 536 537 if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) 538 return EINVAL; 539 540 sigpending1(l, &bss); 541 native_to_linux32_sigset(&lss, &bss); 542 return copyout(&lss, SCARG_P32(uap, set), sizeof(lss)); 543 } 544 545 int 546 linux32_sys_siggetmask(struct lwp *l, const void *v, register_t *retval) 547 { 548 struct proc *p = l->l_proc; 549 sigset_t bss; 550 linux32_old_sigset_t lss; 551 int error; 552 553 mutex_enter(p->p_lock); 554 error = sigprocmask1(l, SIG_SETMASK, 0, &bss); 555 mutex_exit(p->p_lock); 556 if (error) 557 return error; 558 native_to_linux32_old_sigset(&lss, &bss); 559 *retval = lss; 560 return 0; 561 } 562 563 int 564 linux32_sys_sigsetmask(struct lwp *l, const struct linux32_sys_sigsetmask_args *uap, register_t *retval) 565 { 566 /* { 567 syscallarg(linux32_old_sigset_t) mask; 568 } */ 569 sigset_t nbss, obss; 570 linux32_old_sigset_t nlss, olss; 571 struct proc *p = l->l_proc; 572 int error; 573 574 nlss = SCARG(uap, mask); 575 linux32_old_to_native_sigset(&nbss, &nlss); 576 mutex_enter(p->p_lock); 577 error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss); 578 mutex_exit(p->p_lock); 579 if (error) 580 return error; 581 native_to_linux32_old_sigset(&olss, &obss); 582 *retval = olss; 583 return 0; 584 } 585 586 int 587 linux32_sys_rt_queueinfo(struct lwp *l, const struct linux32_sys_rt_queueinfo_args *uap, register_t *retval) 588 { 589 /* 590 syscallarg(int) pid; 591 syscallarg(int) sig; 592 syscallarg(linux32_siginfop_t) uinfo; 593 */ 594 int error; 595 linux32_siginfo_t info; 596 597 error = copyin(SCARG_P32(uap, uinfo), &info, sizeof(info)); 598 if (error) 599 return error; 600 if (info.lsi_code >= 0) 601 return EPERM; 602 603 /* XXX To really implement this we need to */ 604 /* XXX keep a list of queued signals somewhere. */ 605 return linux32_sys_kill(l, (const void *)uap, retval); 606 } 607 608 int 609 native_to_linux32_si_code(int code) 610 { 611 int si_codes[] = { 612 LINUX32_SI_USER, LINUX32_SI_QUEUE, LINUX32_SI_TIMER, 613 LINUX32_SI_ASYNCIO, LINUX32_SI_MESGQ, LINUX32_SI_TKILL /* SI_LWP */ 614 }; 615 616 if (code <= 0 && -code < __arraycount(si_codes)) 617 return si_codes[-code]; 618 619 return code; 620 } 621 622 int 623 native_to_linux32_si_status(int code, int status) 624 { 625 int sts; 626 627 switch (code) { 628 case CLD_CONTINUED: 629 sts = LINUX_SIGCONT; 630 break; 631 case CLD_EXITED: 632 sts = WEXITSTATUS(status); 633 break; 634 case CLD_STOPPED: 635 case CLD_TRAPPED: 636 case CLD_DUMPED: 637 case CLD_KILLED: 638 default: 639 sts = native_to_linux32_signo[WTERMSIG(status)]; 640 break; 641 } 642 643 return sts; 644 } 645
Indexes created Fri Oct 03 02:09:57 GMT 2025