linux_signal.c revision 1.49.20.2
1 /* $NetBSD: linux_signal.c,v 1.49.20.2 2006/11/18 21:39:08 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 /* 39 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp 40 */ 41 42 /* 43 * Functions in multiarch: 44 * linux_sys_signal : linux_sig_notalpha.c 45 * linux_sys_siggetmask : linux_sig_notalpha.c 46 * linux_sys_sigsetmask : linux_sig_notalpha.c 47 * linux_sys_pause : linux_sig_notalpha.c 48 * linux_sys_sigaction : linux_sigaction.c 49 * 50 */ 51 52 /* 53 * Unimplemented: 54 * linux_sys_rt_sigtimedwait : sigsuspend w/timeout. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: linux_signal.c,v 1.49.20.2 2006/11/18 21:39:08 ad Exp $"); 59 60 #define COMPAT_LINUX 1 61 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/namei.h> 65 #include <sys/proc.h> 66 #include <sys/filedesc.h> 67 #include <sys/ioctl.h> 68 #include <sys/mount.h> 69 #include <sys/kernel.h> 70 #include <sys/signal.h> 71 #include <sys/signalvar.h> 72 #include <sys/malloc.h> 73 74 #include <sys/sa.h> 75 #include <sys/syscallargs.h> 76 77 #include <compat/linux/common/linux_types.h> 78 #include <compat/linux/common/linux_signal.h> 79 #include <compat/linux/common/linux_exec.h> /* For emul_linux */ 80 #include <compat/linux/common/linux_machdep.h> /* For LINUX_NPTL */ 81 #include <compat/linux/common/linux_emuldata.h> /* for linux_emuldata */ 82 #include <compat/linux/common/linux_siginfo.h> 83 #include <compat/linux/common/linux_sigevent.h> 84 #include <compat/linux/common/linux_util.h> 85 86 #include <compat/linux/linux_syscallargs.h> 87 88 /* Locally used defines (in bsd<->linux conversion functions): */ 89 #define linux_sigemptyset(s) memset((s), 0, sizeof(*(s))) 90 #define linux_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \ 91 & (1 << ((n) - 1) % LINUX__NSIG_BPW)) 92 #define linux_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \ 93 |= (1 << ((n) - 1) % LINUX__NSIG_BPW)) 94 95 #ifdef DEBUG_LINUX 96 #define DPRINTF(a) uprintf a 97 #else 98 #define DPRINTF(a) 99 #endif 100 101 extern const int native_to_linux_signo[]; 102 extern const int linux_to_native_signo[]; 103 104 /* 105 * Convert between Linux and BSD signal sets. 106 */ 107 #if LINUX__NSIG_WORDS > 1 108 void 109 linux_old_extra_to_native_sigset(bss, lss, extra) 110 sigset_t *bss; 111 const linux_old_sigset_t *lss; 112 const unsigned long *extra; 113 { 114 linux_sigset_t lsnew; 115 116 /* convert old sigset to new sigset */ 117 linux_sigemptyset(&lsnew); 118 lsnew.sig[0] = *lss; 119 if (extra) 120 memcpy(&lsnew.sig[1], extra, 121 sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t)); 122 123 linux_to_native_sigset(bss, &lsnew); 124 } 125 126 void 127 native_to_linux_old_extra_sigset(lss, extra, bss) 128 linux_old_sigset_t *lss; 129 unsigned long *extra; 130 const sigset_t *bss; 131 { 132 linux_sigset_t lsnew; 133 134 native_to_linux_sigset(&lsnew, bss); 135 136 /* convert new sigset to old sigset */ 137 *lss = lsnew.sig[0]; 138 if (extra) 139 memcpy(extra, &lsnew.sig[1], 140 sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t)); 141 } 142 #endif /* LINUX__NSIG_WORDS > 1 */ 143 144 void 145 linux_to_native_sigset(bss, lss) 146 sigset_t *bss; 147 const linux_sigset_t *lss; 148 { 149 int i, newsig; 150 151 sigemptyset(bss); 152 for (i = 1; i < LINUX__NSIG; i++) { 153 if (linux_sigismember(lss, i)) { 154 newsig = linux_to_native_signo[i]; 155 if (newsig) 156 sigaddset(bss, newsig); 157 } 158 } 159 } 160 161 void 162 native_to_linux_sigset(lss, bss) 163 linux_sigset_t *lss; 164 const sigset_t *bss; 165 { 166 int i, newsig; 167 168 linux_sigemptyset(lss); 169 for (i = 1; i < NSIG; i++) { 170 if (sigismember(bss, i)) { 171 newsig = native_to_linux_signo[i]; 172 if (newsig) 173 linux_sigaddset(lss, newsig); 174 } 175 } 176 } 177 178 unsigned int 179 native_to_linux_sigflags(bsf) 180 const int bsf; 181 { 182 unsigned int lsf = 0; 183 if ((bsf & SA_NOCLDSTOP) != 0) 184 lsf |= LINUX_SA_NOCLDSTOP; 185 if ((bsf & SA_NOCLDWAIT) != 0) 186 lsf |= LINUX_SA_NOCLDWAIT; 187 if ((bsf & SA_ONSTACK) != 0) 188 lsf |= LINUX_SA_ONSTACK; 189 if ((bsf & SA_RESTART) != 0) 190 lsf |= LINUX_SA_RESTART; 191 if ((bsf & SA_NODEFER) != 0) 192 lsf |= LINUX_SA_NOMASK; 193 if ((bsf & SA_RESETHAND) != 0) 194 lsf |= LINUX_SA_ONESHOT; 195 if ((bsf & SA_SIGINFO) != 0) 196 lsf |= LINUX_SA_SIGINFO; 197 return lsf; 198 } 199 200 int 201 linux_to_native_sigflags(lsf) 202 const unsigned long lsf; 203 { 204 int bsf = 0; 205 if ((lsf & LINUX_SA_NOCLDSTOP) != 0) 206 bsf |= SA_NOCLDSTOP; 207 if ((lsf & LINUX_SA_NOCLDWAIT) != 0) 208 bsf |= SA_NOCLDWAIT; 209 if ((lsf & LINUX_SA_ONSTACK) != 0) 210 bsf |= SA_ONSTACK; 211 if ((lsf & LINUX_SA_RESTART) != 0) 212 bsf |= SA_RESTART; 213 if ((lsf & LINUX_SA_ONESHOT) != 0) 214 bsf |= SA_RESETHAND; 215 if ((lsf & LINUX_SA_NOMASK) != 0) 216 bsf |= SA_NODEFER; 217 if ((lsf & LINUX_SA_SIGINFO) != 0) 218 bsf |= SA_SIGINFO; 219 if ((lsf & ~LINUX_SA_ALLBITS) != 0) { 220 DPRINTF(("linux_old_to_native_sigflags: " 221 "%lx extra bits ignored\n", lsf)); 222 } 223 return bsf; 224 } 225 226 /* 227 * Convert between Linux and BSD sigaction structures. 228 */ 229 void 230 linux_old_to_native_sigaction(bsa, lsa) 231 struct sigaction *bsa; 232 const struct linux_old_sigaction *lsa; 233 { 234 bsa->sa_handler = lsa->linux_sa_handler; 235 linux_old_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 236 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 237 } 238 239 void 240 native_to_linux_old_sigaction(lsa, bsa) 241 struct linux_old_sigaction *lsa; 242 const struct sigaction *bsa; 243 { 244 lsa->linux_sa_handler = bsa->sa_handler; 245 native_to_linux_old_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 246 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 247 #ifndef __alpha__ 248 lsa->linux_sa_restorer = NULL; 249 #endif 250 } 251 252 /* ...and the new sigaction conversion funcs. */ 253 void 254 linux_to_native_sigaction(bsa, lsa) 255 struct sigaction *bsa; 256 const struct linux_sigaction *lsa; 257 { 258 bsa->sa_handler = lsa->linux_sa_handler; 259 linux_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 260 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 261 } 262 263 void 264 native_to_linux_sigaction(lsa, bsa) 265 struct linux_sigaction *lsa; 266 const struct sigaction *bsa; 267 { 268 lsa->linux_sa_handler = bsa->sa_handler; 269 native_to_linux_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 270 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 271 #ifndef __alpha__ 272 lsa->linux_sa_restorer = NULL; 273 #endif 274 } 275 276 /* ----------------------------------------------------------------------- */ 277 278 /* 279 * The Linux sigaction() system call. Do the usual conversions, 280 * and just call sigaction(). Some flags and values are silently 281 * ignored (see above). 282 */ 283 int 284 linux_sys_rt_sigaction(struct lwp *l, void *v, register_t *retval) 285 { 286 struct linux_sys_rt_sigaction_args /* { 287 syscallarg(int) signum; 288 syscallarg(const struct linux_sigaction *) nsa; 289 syscallarg(struct linux_sigaction *) osa; 290 syscallarg(size_t) sigsetsize; 291 } */ *uap = v; 292 struct linux_sigaction nlsa, olsa; 293 struct sigaction nbsa, obsa; 294 int error, sig; 295 void *tramp = NULL; 296 int vers = 0; 297 #if defined __amd64__ 298 struct sigacts *ps = l->l_proc->p_sigacts; 299 #endif 300 301 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 302 return (EINVAL); 303 304 if (SCARG(uap, nsa)) { 305 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa)); 306 if (error) 307 return (error); 308 linux_to_native_sigaction(&nbsa, &nlsa); 309 } 310 311 sig = SCARG(uap, signum); 312 if (sig < 0 || sig >= LINUX__NSIG) 313 return (EINVAL); 314 if (sig > 0 && !linux_to_native_signo[sig]) { 315 /* Pretend that we did something useful for unknown signals. */ 316 obsa.sa_handler = SIG_IGN; 317 sigemptyset(&obsa.sa_mask); 318 obsa.sa_flags = 0; 319 } else { 320 #if defined __amd64__ 321 if (nlsa.linux_sa_flags & LINUX_SA_RESTORER) { 322 if ((tramp = nlsa.linux_sa_restorer) != NULL) 323 vers = 2; /* XXX arch dependant */ 324 } 325 #endif 326 327 error = sigaction1(l, linux_to_native_signo[sig], 328 SCARG(uap, nsa) ? &nbsa : NULL, 329 SCARG(uap, osa) ? &obsa : NULL, 330 tramp, vers); 331 if (error) 332 return (error); 333 } 334 if (SCARG(uap, osa)) { 335 native_to_linux_sigaction(&olsa, &obsa); 336 337 #if defined __amd64__ 338 if (ps->sa_sigdesc[sig].sd_vers != 0) { 339 olsa.linux_sa_restorer = ps->sa_sigdesc[sig].sd_tramp; 340 olsa.linux_sa_flags |= LINUX_SA_RESTORER; 341 } 342 #endif 343 344 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa)); 345 if (error) 346 return (error); 347 } 348 return (0); 349 } 350 351 int 352 linux_sigprocmask1(l, how, set, oset) 353 struct lwp *l; 354 int how; 355 const linux_old_sigset_t *set; 356 linux_old_sigset_t *oset; 357 { 358 linux_old_sigset_t nlss, olss; 359 sigset_t nbss, obss; 360 int error; 361 362 switch (how) { 363 case LINUX_SIG_BLOCK: 364 how = SIG_BLOCK; 365 break; 366 case LINUX_SIG_UNBLOCK: 367 how = SIG_UNBLOCK; 368 break; 369 case LINUX_SIG_SETMASK: 370 how = SIG_SETMASK; 371 break; 372 default: 373 return (EINVAL); 374 } 375 376 if (set) { 377 error = copyin(set, &nlss, sizeof(nlss)); 378 if (error) 379 return (error); 380 linux_old_to_native_sigset(&nbss, &nlss); 381 } 382 error = sigprocmask1(l, how, 383 set ? &nbss : NULL, oset ? &obss : NULL); 384 if (error) 385 return (error); 386 if (oset) { 387 native_to_linux_old_sigset(&olss, &obss); 388 error = copyout(&olss, oset, sizeof(olss)); 389 if (error) 390 return (error); 391 } 392 return (error); 393 } 394 395 int 396 linux_sys_rt_sigprocmask(struct lwp *l, void *v, register_t *retval) 397 { 398 struct linux_sys_rt_sigprocmask_args /* { 399 syscallarg(int) how; 400 syscallarg(const linux_sigset_t *) set; 401 syscallarg(linux_sigset_t *) oset; 402 syscallarg(size_t) sigsetsize; 403 } */ *uap = v; 404 linux_sigset_t nlss, olss, *oset; 405 const linux_sigset_t *set; 406 sigset_t nbss, obss; 407 int error, how; 408 409 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 410 return (EINVAL); 411 412 switch (SCARG(uap, how)) { 413 case LINUX_SIG_BLOCK: 414 how = SIG_BLOCK; 415 break; 416 case LINUX_SIG_UNBLOCK: 417 how = SIG_UNBLOCK; 418 break; 419 case LINUX_SIG_SETMASK: 420 how = SIG_SETMASK; 421 break; 422 default: 423 return (EINVAL); 424 } 425 426 set = SCARG(uap, set); 427 oset = SCARG(uap, oset); 428 429 if (set) { 430 error = copyin(set, &nlss, sizeof(nlss)); 431 if (error) 432 return (error); 433 linux_to_native_sigset(&nbss, &nlss); 434 } 435 error = sigprocmask1(l, how, 436 set ? &nbss : NULL, oset ? &obss : NULL); 437 if (!error && oset) { 438 native_to_linux_sigset(&olss, &obss); 439 error = copyout(&olss, oset, sizeof(olss)); 440 } 441 return (error); 442 } 443 444 int 445 linux_sys_rt_sigpending(struct lwp *l, void *v, register_t *retval) 446 { 447 struct linux_sys_rt_sigpending_args /* { 448 syscallarg(linux_sigset_t *) set; 449 syscallarg(size_t) sigsetsize; 450 } */ *uap = v; 451 sigset_t bss; 452 linux_sigset_t lss; 453 454 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 455 return (EINVAL); 456 457 sigpending1(l, &bss); 458 native_to_linux_sigset(&lss, &bss); 459 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 460 } 461 462 #ifndef __amd64__ 463 int 464 linux_sys_sigpending(struct lwp *l, void *v, register_t *retval) 465 { 466 struct linux_sys_sigpending_args /* { 467 syscallarg(linux_old_sigset_t *) mask; 468 } */ *uap = v; 469 sigset_t bss; 470 linux_old_sigset_t lss; 471 472 sigpending1(l, &bss); 473 native_to_linux_old_sigset(&lss, &bss); 474 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 475 } 476 477 int 478 linux_sys_sigsuspend(struct lwp *l, void *v, register_t *retval) 479 { 480 struct linux_sys_sigsuspend_args /* { 481 syscallarg(caddr_t) restart; 482 syscallarg(int) oldmask; 483 syscallarg(int) mask; 484 } */ *uap = v; 485 linux_old_sigset_t lss; 486 sigset_t bss; 487 488 lss = SCARG(uap, mask); 489 linux_old_to_native_sigset(&bss, &lss); 490 return (sigsuspend1(l, &bss)); 491 } 492 #endif /* __amd64__ */ 493 494 int 495 linux_sys_rt_sigsuspend(struct lwp *l, void *v, register_t *retval) 496 { 497 struct linux_sys_rt_sigsuspend_args /* { 498 syscallarg(linux_sigset_t *) unewset; 499 syscallarg(size_t) sigsetsize; 500 } */ *uap = v; 501 linux_sigset_t lss; 502 sigset_t bss; 503 int error; 504 505 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 506 return (EINVAL); 507 508 error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t)); 509 if (error) 510 return (error); 511 512 linux_to_native_sigset(&bss, &lss); 513 514 return (sigsuspend1(l, &bss)); 515 } 516 517 /* 518 * Once more: only a signal conversion is needed. 519 * Note: also used as sys_rt_queueinfo. The info field is ignored. 520 */ 521 int 522 linux_sys_rt_queueinfo(l, v, retval) 523 struct lwp *l; 524 void *v; 525 register_t *retval; 526 { 527 /* XXX XAX This isn't this really int, int, siginfo_t *, is it? */ 528 #if 0 529 struct linux_sys_rt_queueinfo_args /* { 530 syscallarg(int) pid; 531 syscallarg(int) signum; 532 syscallarg(siginfo_t *) uinfo; 533 } */ *uap = v; 534 #endif 535 536 /* XXX To really implement this we need to */ 537 /* XXX keep a list of queued signals somewhere. */ 538 return (linux_sys_kill(l, v, retval)); 539 } 540 541 int 542 linux_sys_kill(l, v, retval) 543 struct lwp *l; 544 void *v; 545 register_t *retval; 546 { 547 struct linux_sys_kill_args /* { 548 syscallarg(int) pid; 549 syscallarg(int) signum; 550 } */ *uap = v; 551 552 struct sys_kill_args ka; 553 int sig; 554 555 SCARG(&ka, pid) = SCARG(uap, pid); 556 sig = SCARG(uap, signum); 557 if (sig < 0 || sig >= LINUX__NSIG) 558 return (EINVAL); 559 SCARG(&ka, signum) = linux_to_native_signo[sig]; 560 return sys_kill(l, &ka, retval); 561 } 562 563 #ifdef LINUX_SS_ONSTACK 564 static void linux_to_native_sigaltstack __P((struct sigaltstack *, 565 const struct linux_sigaltstack *)); 566 567 static void 568 linux_to_native_sigaltstack(bss, lss) 569 struct sigaltstack *bss; 570 const struct linux_sigaltstack *lss; 571 { 572 bss->ss_sp = lss->ss_sp; 573 bss->ss_size = lss->ss_size; 574 if (lss->ss_flags & LINUX_SS_ONSTACK) 575 bss->ss_flags = SS_ONSTACK; 576 else if (lss->ss_flags & LINUX_SS_DISABLE) 577 bss->ss_flags = SS_DISABLE; 578 else 579 bss->ss_flags = 0; 580 } 581 582 void 583 native_to_linux_sigaltstack(lss, bss) 584 struct linux_sigaltstack *lss; 585 const struct sigaltstack *bss; 586 { 587 lss->ss_sp = bss->ss_sp; 588 lss->ss_size = bss->ss_size; 589 if (bss->ss_flags & SS_ONSTACK) 590 lss->ss_flags = LINUX_SS_ONSTACK; 591 else if (bss->ss_flags & SS_DISABLE) 592 lss->ss_flags = LINUX_SS_DISABLE; 593 else 594 lss->ss_flags = 0; 595 } 596 597 int 598 linux_sys_sigaltstack(struct lwp *l, void *v, register_t *retval) 599 { 600 struct linux_sys_sigaltstack_args /* { 601 syscallarg(const struct linux_sigaltstack *) ss; 602 syscallarg(struct linux_sigaltstack *) oss; 603 } */ *uap = v; 604 struct linux_sigaltstack ss; 605 struct sigaltstack nss; 606 struct proc *p = l->l_proc; 607 int error = 0; 608 609 if (SCARG(uap, oss)) { 610 native_to_linux_sigaltstack(&ss, l->l_sigstk); 611 if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0) 612 return error; 613 } 614 615 if (SCARG(uap, ss) != NULL) { 616 if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0) 617 return error; 618 linux_to_native_sigaltstack(&nss, &ss); 619 620 mutex_enter(&p->p_smutex); 621 622 if (nss.ss_flags & ~SS_ALLBITS) 623 error = EINVAL; 624 else if (nss.ss_flags & SS_DISABLE) { 625 if (l->l_sigstk->ss_flags & SS_ONSTACK) 626 error = EINVAL; 627 } else if (nss.ss_size < LINUX_MINSIGSTKSZ) 628 error = ENOMEM; 629 630 if (error == 0) 631 *l->l_sigstk = nss; 632 633 mutex_exit(&p->p_smutex); 634 } 635 636 return error; 637 } 638 #endif /* LINUX_SS_ONSTACK */ 639 640 #ifdef LINUX_NPTL 641 int 642 linux_sys_tkill(l, v, retval) 643 struct lwp *l; 644 void *v; 645 register_t *retval; 646 { 647 struct linux_sys_tkill_args /* { 648 syscallarg(int) tid; 649 syscallarg(int) sig; 650 } */ *uap = v; 651 struct linux_sys_kill_args cup; 652 653 /* We use the PID as the TID ... */ 654 SCARG(&cup, pid) = SCARG(uap, tid); 655 SCARG(&cup, signum) = SCARG(uap, sig); 656 657 return linux_sys_kill(l, &cup, retval); 658 } 659 660 int 661 linux_sys_tgkill(l, v, retval) 662 struct lwp *l; 663 void *v; 664 register_t *retval; 665 { 666 struct linux_sys_tgkill_args /* { 667 syscallarg(int) tgid; 668 syscallarg(int) tid; 669 syscallarg(int) sig; 670 } */ *uap = v; 671 struct linux_sys_kill_args cup; 672 struct linux_emuldata *led; 673 struct proc *p; 674 675 SCARG(&cup, pid) = SCARG(uap, tid); 676 SCARG(&cup, signum) = SCARG(uap, sig); 677 678 if (SCARG(uap, tgid) == -1) 679 return linux_sys_kill(l, &cup, retval); 680 681 /* We use the PID as the TID, but make sure the group ID is right */ 682 if ((p = pfind(SCARG(uap, tid))) == NULL) 683 return ESRCH; 684 685 if (p->p_emul != &emul_linux) 686 return ESRCH; 687 688 led = p->p_emuldata; 689 690 if (led->s->group_pid != SCARG(uap, tgid)) 691 return ESRCH; 692 693 return linux_sys_kill(l, &cup, retval); 694 } 695 #endif /* LINUX_NPTL */ 696
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