linux_signal.c revision 1.49.20.1
1 /* $NetBSD: linux_signal.c,v 1.49.20.1 2006/10/24 21:10:22 ad Exp $ */ 2 /*- 3 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Frank van der Linden and Eric Haszlakiewicz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 /* 38 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp 39 */ 40 41 /* 42 * Functions in multiarch: 43 * linux_sys_signal : linux_sig_notalpha.c 44 * linux_sys_siggetmask : linux_sig_notalpha.c 45 * linux_sys_sigsetmask : linux_sig_notalpha.c 46 * linux_sys_pause : linux_sig_notalpha.c 47 * linux_sys_sigaction : linux_sigaction.c 48 * 49 */ 50 51 /* 52 * Unimplemented: 53 * linux_sys_rt_sigtimedwait : sigsuspend w/timeout. 54 */ 55 56 #include <sys/cdefs.h> 57 __KERNEL_RCSID(0, "$NetBSD: linux_signal.c,v 1.49.20.1 2006/10/24 21:10:22 ad Exp $"); 58 59 #define COMPAT_LINUX 1 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/namei.h> 64 #include <sys/proc.h> 65 #include <sys/filedesc.h> 66 #include <sys/ioctl.h> 67 #include <sys/mount.h> 68 #include <sys/kernel.h> 69 #include <sys/signal.h> 70 #include <sys/signalvar.h> 71 #include <sys/malloc.h> 72 73 #include <sys/sa.h> 74 #include <sys/syscallargs.h> 75 76 #include <compat/linux/common/linux_types.h> 77 #include <compat/linux/common/linux_signal.h> 78 #include <compat/linux/common/linux_exec.h> /* For emul_linux */ 79 #include <compat/linux/common/linux_machdep.h> /* For LINUX_NPTL */ 80 #include <compat/linux/common/linux_emuldata.h> /* for linux_emuldata */ 81 #include <compat/linux/common/linux_siginfo.h> 82 #include <compat/linux/common/linux_sigevent.h> 83 #include <compat/linux/common/linux_util.h> 84 85 #include <compat/linux/linux_syscallargs.h> 86 87 /* Locally used defines (in bsd<->linux conversion functions): */ 88 #define linux_sigemptyset(s) memset((s), 0, sizeof(*(s))) 89 #define linux_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \ 90 & (1 << ((n) - 1) % LINUX__NSIG_BPW)) 91 #define linux_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \ 92 |= (1 << ((n) - 1) % LINUX__NSIG_BPW)) 93 94 #ifdef DEBUG_LINUX 95 #define DPRINTF(a) uprintf a 96 #else 97 #define DPRINTF(a) 98 #endif 99 100 extern const int native_to_linux_signo[]; 101 extern const int linux_to_native_signo[]; 102 103 /* 104 * Convert between Linux and BSD signal sets. 105 */ 106 #if LINUX__NSIG_WORDS > 1 107 void 108 linux_old_extra_to_native_sigset(bss, lss, extra) 109 sigset_t *bss; 110 const linux_old_sigset_t *lss; 111 const unsigned long *extra; 112 { 113 linux_sigset_t lsnew; 114 115 /* convert old sigset to new sigset */ 116 linux_sigemptyset(&lsnew); 117 lsnew.sig[0] = *lss; 118 if (extra) 119 memcpy(&lsnew.sig[1], extra, 120 sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t)); 121 122 linux_to_native_sigset(bss, &lsnew); 123 } 124 125 void 126 native_to_linux_old_extra_sigset(lss, extra, bss) 127 linux_old_sigset_t *lss; 128 unsigned long *extra; 129 const sigset_t *bss; 130 { 131 linux_sigset_t lsnew; 132 133 native_to_linux_sigset(&lsnew, bss); 134 135 /* convert new sigset to old sigset */ 136 *lss = lsnew.sig[0]; 137 if (extra) 138 memcpy(extra, &lsnew.sig[1], 139 sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t)); 140 } 141 #endif /* LINUX__NSIG_WORDS > 1 */ 142 143 void 144 linux_to_native_sigset(bss, lss) 145 sigset_t *bss; 146 const linux_sigset_t *lss; 147 { 148 int i, newsig; 149 150 sigemptyset(bss); 151 for (i = 1; i < LINUX__NSIG; i++) { 152 if (linux_sigismember(lss, i)) { 153 newsig = linux_to_native_signo[i]; 154 if (newsig) 155 sigaddset(bss, newsig); 156 } 157 } 158 } 159 160 void 161 native_to_linux_sigset(lss, bss) 162 linux_sigset_t *lss; 163 const sigset_t *bss; 164 { 165 int i, newsig; 166 167 linux_sigemptyset(lss); 168 for (i = 1; i < NSIG; i++) { 169 if (sigismember(bss, i)) { 170 newsig = native_to_linux_signo[i]; 171 if (newsig) 172 linux_sigaddset(lss, newsig); 173 } 174 } 175 } 176 177 unsigned int 178 native_to_linux_sigflags(bsf) 179 const int bsf; 180 { 181 unsigned int lsf = 0; 182 if ((bsf & SA_NOCLDSTOP) != 0) 183 lsf |= LINUX_SA_NOCLDSTOP; 184 if ((bsf & SA_NOCLDWAIT) != 0) 185 lsf |= LINUX_SA_NOCLDWAIT; 186 if ((bsf & SA_ONSTACK) != 0) 187 lsf |= LINUX_SA_ONSTACK; 188 if ((bsf & SA_RESTART) != 0) 189 lsf |= LINUX_SA_RESTART; 190 if ((bsf & SA_NODEFER) != 0) 191 lsf |= LINUX_SA_NOMASK; 192 if ((bsf & SA_RESETHAND) != 0) 193 lsf |= LINUX_SA_ONESHOT; 194 if ((bsf & SA_SIGINFO) != 0) 195 lsf |= LINUX_SA_SIGINFO; 196 return lsf; 197 } 198 199 int 200 linux_to_native_sigflags(lsf) 201 const unsigned long lsf; 202 { 203 int bsf = 0; 204 if ((lsf & LINUX_SA_NOCLDSTOP) != 0) 205 bsf |= SA_NOCLDSTOP; 206 if ((lsf & LINUX_SA_NOCLDWAIT) != 0) 207 bsf |= SA_NOCLDWAIT; 208 if ((lsf & LINUX_SA_ONSTACK) != 0) 209 bsf |= SA_ONSTACK; 210 if ((lsf & LINUX_SA_RESTART) != 0) 211 bsf |= SA_RESTART; 212 if ((lsf & LINUX_SA_ONESHOT) != 0) 213 bsf |= SA_RESETHAND; 214 if ((lsf & LINUX_SA_NOMASK) != 0) 215 bsf |= SA_NODEFER; 216 if ((lsf & LINUX_SA_SIGINFO) != 0) 217 bsf |= SA_SIGINFO; 218 if ((lsf & ~LINUX_SA_ALLBITS) != 0) 219 DPRINTF(("linux_old_to_native_sigflags: " 220 "%lx extra bits ignored\n", lsf)); 221 return bsf; 222 } 223 224 /* 225 * Convert between Linux and BSD sigaction structures. 226 */ 227 void 228 linux_old_to_native_sigaction(bsa, lsa) 229 struct sigaction *bsa; 230 const struct linux_old_sigaction *lsa; 231 { 232 bsa->sa_handler = lsa->linux_sa_handler; 233 linux_old_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 234 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 235 } 236 237 void 238 native_to_linux_old_sigaction(lsa, bsa) 239 struct linux_old_sigaction *lsa; 240 const struct sigaction *bsa; 241 { 242 lsa->linux_sa_handler = bsa->sa_handler; 243 native_to_linux_old_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 244 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 245 #ifndef __alpha__ 246 lsa->linux_sa_restorer = NULL; 247 #endif 248 } 249 250 /* ...and the new sigaction conversion funcs. */ 251 void 252 linux_to_native_sigaction(bsa, lsa) 253 struct sigaction *bsa; 254 const struct linux_sigaction *lsa; 255 { 256 bsa->sa_handler = lsa->linux_sa_handler; 257 linux_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 258 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 259 } 260 261 void 262 native_to_linux_sigaction(lsa, bsa) 263 struct linux_sigaction *lsa; 264 const struct sigaction *bsa; 265 { 266 lsa->linux_sa_handler = bsa->sa_handler; 267 native_to_linux_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 268 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 269 #ifndef __alpha__ 270 lsa->linux_sa_restorer = NULL; 271 #endif 272 } 273 274 /* ----------------------------------------------------------------------- */ 275 276 /* 277 * The Linux sigaction() system call. Do the usual conversions, 278 * and just call sigaction(). Some flags and values are silently 279 * ignored (see above). 280 */ 281 int 282 linux_sys_rt_sigaction(l, v, retval) 283 struct lwp *l; 284 void *v; 285 register_t *retval; 286 { 287 struct linux_sys_rt_sigaction_args /* { 288 syscallarg(int) signum; 289 syscallarg(const struct linux_sigaction *) nsa; 290 syscallarg(struct linux_sigaction *) osa; 291 syscallarg(size_t) sigsetsize; 292 } */ *uap = v; 293 struct linux_sigaction nlsa, olsa; 294 struct sigaction nbsa, obsa; 295 int error, sig; 296 void *tramp = NULL; 297 int vers = 0; 298 #if defined __amd64__ 299 struct sigacts *ps = l->l_proc->p_sigacts; 300 #endif 301 302 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 303 return (EINVAL); 304 305 if (SCARG(uap, nsa)) { 306 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa)); 307 if (error) 308 return (error); 309 linux_to_native_sigaction(&nbsa, &nlsa); 310 } 311 312 sig = SCARG(uap, signum); 313 if (sig < 0 || sig >= LINUX__NSIG) 314 return (EINVAL); 315 if (sig > 0 && !linux_to_native_signo[sig]) { 316 /* Pretend that we did something useful for unknown signals. */ 317 obsa.sa_handler = SIG_IGN; 318 sigemptyset(&obsa.sa_mask); 319 obsa.sa_flags = 0; 320 } else { 321 #if defined __amd64__ 322 if (nlsa.linux_sa_flags & LINUX_SA_RESTORER) { 323 if ((tramp = nlsa.linux_sa_restorer) != NULL) 324 vers = 2; /* XXX arch dependant */ 325 } 326 #endif 327 328 error = sigaction1(l, linux_to_native_signo[sig], 329 SCARG(uap, nsa) ? &nbsa : NULL, 330 SCARG(uap, osa) ? &obsa : NULL, 331 tramp, vers); 332 if (error) 333 return (error); 334 } 335 if (SCARG(uap, osa)) { 336 native_to_linux_sigaction(&olsa, &obsa); 337 338 #if defined __amd64__ 339 if (ps->sa_sigdesc[sig].sd_vers != 0) { 340 olsa.linux_sa_restorer = ps->sa_sigdesc[sig].sd_tramp; 341 olsa.linux_sa_flags |= LINUX_SA_RESTORER; 342 } 343 #endif 344 345 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa)); 346 if (error) 347 return (error); 348 } 349 return (0); 350 } 351 352 int 353 linux_sigprocmask1(l, how, set, oset) 354 struct lwp *l; 355 int how; 356 const linux_old_sigset_t *set; 357 linux_old_sigset_t *oset; 358 { 359 linux_old_sigset_t nlss, olss; 360 sigset_t nbss, obss; 361 int error; 362 363 switch (how) { 364 case LINUX_SIG_BLOCK: 365 how = SIG_BLOCK; 366 break; 367 case LINUX_SIG_UNBLOCK: 368 how = SIG_UNBLOCK; 369 break; 370 case LINUX_SIG_SETMASK: 371 how = SIG_SETMASK; 372 break; 373 default: 374 return (EINVAL); 375 } 376 377 if (set) { 378 error = copyin(set, &nlss, sizeof(nlss)); 379 if (error) 380 return (error); 381 linux_old_to_native_sigset(&nbss, &nlss); 382 } 383 error = sigprocmask1(l, how, 384 set ? &nbss : NULL, oset ? &obss : NULL); 385 if (error) 386 return (error); 387 if (oset) { 388 native_to_linux_old_sigset(&olss, &obss); 389 error = copyout(&olss, oset, sizeof(olss)); 390 if (error) 391 return (error); 392 } 393 return (error); 394 } 395 396 int 397 linux_sys_rt_sigprocmask(l, v, retval) 398 struct lwp *l; 399 void *v; 400 register_t *retval; 401 { 402 struct linux_sys_rt_sigprocmask_args /* { 403 syscallarg(int) how; 404 syscallarg(const linux_sigset_t *) set; 405 syscallarg(linux_sigset_t *) oset; 406 syscallarg(size_t) sigsetsize; 407 } */ *uap = v; 408 linux_sigset_t nlss, olss, *oset; 409 const linux_sigset_t *set; 410 sigset_t nbss, obss; 411 int error, how; 412 413 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 414 return (EINVAL); 415 416 switch (SCARG(uap, how)) { 417 case LINUX_SIG_BLOCK: 418 how = SIG_BLOCK; 419 break; 420 case LINUX_SIG_UNBLOCK: 421 how = SIG_UNBLOCK; 422 break; 423 case LINUX_SIG_SETMASK: 424 how = SIG_SETMASK; 425 break; 426 default: 427 return (EINVAL); 428 } 429 430 set = SCARG(uap, set); 431 oset = SCARG(uap, oset); 432 433 if (set) { 434 error = copyin(set, &nlss, sizeof(nlss)); 435 if (error) 436 return (error); 437 linux_to_native_sigset(&nbss, &nlss); 438 } 439 error = sigprocmask1(l, how, 440 set ? &nbss : NULL, oset ? &obss : NULL); 441 if (!error && oset) { 442 native_to_linux_sigset(&olss, &obss); 443 error = copyout(&olss, oset, sizeof(olss)); 444 } 445 return (error); 446 } 447 448 int 449 linux_sys_rt_sigpending(l, v, retval) 450 struct lwp *l; 451 void *v; 452 register_t *retval; 453 { 454 struct linux_sys_rt_sigpending_args /* { 455 syscallarg(linux_sigset_t *) set; 456 syscallarg(size_t) sigsetsize; 457 } */ *uap = v; 458 sigset_t bss; 459 linux_sigset_t lss; 460 461 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 462 return (EINVAL); 463 464 sigpending1(l, &bss); 465 native_to_linux_sigset(&lss, &bss); 466 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 467 } 468 469 #ifndef __amd64__ 470 int 471 linux_sys_sigpending(l, v, retval) 472 struct lwp *l; 473 void *v; 474 register_t *retval; 475 { 476 struct linux_sys_sigpending_args /* { 477 syscallarg(linux_old_sigset_t *) mask; 478 } */ *uap = v; 479 sigset_t bss; 480 linux_old_sigset_t lss; 481 482 sigpending1(l, &bss); 483 native_to_linux_old_sigset(&lss, &bss); 484 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 485 } 486 487 int 488 linux_sys_sigsuspend(l, v, retval) 489 struct lwp *l; 490 void *v; 491 register_t *retval; 492 { 493 struct linux_sys_sigsuspend_args /* { 494 syscallarg(caddr_t) restart; 495 syscallarg(int) oldmask; 496 syscallarg(int) mask; 497 } */ *uap = v; 498 linux_old_sigset_t lss; 499 sigset_t bss; 500 501 lss = SCARG(uap, mask); 502 linux_old_to_native_sigset(&bss, &lss); 503 return (sigsuspend1(l, &bss)); 504 } 505 #endif /* __amd64__ */ 506 507 int 508 linux_sys_rt_sigsuspend(l, v, retval) 509 struct lwp *l; 510 void *v; 511 register_t *retval; 512 { 513 struct linux_sys_rt_sigsuspend_args /* { 514 syscallarg(linux_sigset_t *) unewset; 515 syscallarg(size_t) sigsetsize; 516 } */ *uap = v; 517 linux_sigset_t lss; 518 sigset_t bss; 519 int error; 520 521 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 522 return (EINVAL); 523 524 error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t)); 525 if (error) 526 return (error); 527 528 linux_to_native_sigset(&bss, &lss); 529 530 return (sigsuspend1(l, &bss)); 531 } 532 533 /* 534 * Once more: only a signal conversion is needed. 535 * Note: also used as sys_rt_queueinfo. The info field is ignored. 536 */ 537 int 538 linux_sys_rt_queueinfo(l, v, retval) 539 struct lwp *l; 540 void *v; 541 register_t *retval; 542 { 543 /* XXX XAX This isn't this really int, int, siginfo_t *, is it? */ 544 #if 0 545 struct linux_sys_rt_queueinfo_args /* { 546 syscallarg(int) pid; 547 syscallarg(int) signum; 548 syscallarg(siginfo_t *) uinfo; 549 } */ *uap = v; 550 #endif 551 552 /* XXX To really implement this we need to */ 553 /* XXX keep a list of queued signals somewhere. */ 554 return (linux_sys_kill(l, v, retval)); 555 } 556 557 int 558 linux_sys_kill(l, v, retval) 559 struct lwp *l; 560 void *v; 561 register_t *retval; 562 { 563 struct linux_sys_kill_args /* { 564 syscallarg(int) pid; 565 syscallarg(int) signum; 566 } */ *uap = v; 567 568 struct sys_kill_args ka; 569 int sig; 570 571 SCARG(&ka, pid) = SCARG(uap, pid); 572 sig = SCARG(uap, signum); 573 if (sig < 0 || sig >= LINUX__NSIG) 574 return (EINVAL); 575 SCARG(&ka, signum) = linux_to_native_signo[sig]; 576 return sys_kill(l, &ka, retval); 577 } 578 579 #ifdef LINUX_SS_ONSTACK 580 static void linux_to_native_sigaltstack __P((struct sigaltstack *, 581 const struct linux_sigaltstack *)); 582 583 static void 584 linux_to_native_sigaltstack(bss, lss) 585 struct sigaltstack *bss; 586 const struct linux_sigaltstack *lss; 587 { 588 bss->ss_sp = lss->ss_sp; 589 bss->ss_size = lss->ss_size; 590 if (lss->ss_flags & LINUX_SS_ONSTACK) 591 bss->ss_flags = SS_ONSTACK; 592 else if (lss->ss_flags & LINUX_SS_DISABLE) 593 bss->ss_flags = SS_DISABLE; 594 else 595 bss->ss_flags = 0; 596 } 597 598 void 599 native_to_linux_sigaltstack(lss, bss) 600 struct linux_sigaltstack *lss; 601 const struct sigaltstack *bss; 602 { 603 lss->ss_sp = bss->ss_sp; 604 lss->ss_size = bss->ss_size; 605 if (bss->ss_flags & SS_ONSTACK) 606 lss->ss_flags = LINUX_SS_ONSTACK; 607 else if (bss->ss_flags & SS_DISABLE) 608 lss->ss_flags = LINUX_SS_DISABLE; 609 else 610 lss->ss_flags = 0; 611 } 612 613 int 614 linux_sys_sigaltstack(l, v, retval) 615 struct lwp *l; 616 void *v; 617 register_t *retval; 618 { 619 struct linux_sys_sigaltstack_args /* { 620 syscallarg(const struct linux_sigaltstack *) ss; 621 syscallarg(struct linux_sigaltstack *) oss; 622 } */ *uap = v; 623 struct linux_sigaltstack ss; 624 struct sigaltstack nss; 625 struct proc *p = l->l_proc; 626 int error = 0; 627 628 if (SCARG(uap, oss)) { 629 native_to_linux_sigaltstack(&ss, l->l_sigstk); 630 if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0) 631 return error; 632 } 633 634 if (SCARG(uap, ss) != NULL) { 635 if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0) 636 return error; 637 linux_to_native_sigaltstack(&nss, &ss); 638 639 mutex_enter(&p->p_smutex); 640 641 if (nss.ss_flags & ~SS_ALLBITS) 642 error = EINVAL; 643 else if (nss.ss_flags & SS_DISABLE) { 644 if (l->l_sigstk->ss_flags & SS_ONSTACK) 645 error = EINVAL; 646 } else if (nss.ss_size < LINUX_MINSIGSTKSZ) 647 error = ENOMEM; 648 649 if (error == 0) 650 *l->l_sigstk = nss; 651 652 mutex_exit(&p->p_smutex); 653 } 654 655 return error; 656 } 657 #endif /* LINUX_SS_ONSTACK */ 658 659 #ifdef LINUX_NPTL 660 int 661 linux_sys_tkill(l, v, retval) 662 struct lwp *l; 663 void *v; 664 register_t *retval; 665 { 666 struct linux_sys_tkill_args /* { 667 syscallarg(int) tid; 668 syscallarg(int) sig; 669 } */ *uap = v; 670 struct linux_sys_kill_args cup; 671 672 /* We use the PID as the TID ... */ 673 SCARG(&cup, pid) = SCARG(uap, tid); 674 SCARG(&cup, signum) = SCARG(uap, sig); 675 676 return linux_sys_kill(l, &cup, retval); 677 } 678 679 int 680 linux_sys_tgkill(l, v, retval) 681 struct lwp *l; 682 void *v; 683 register_t *retval; 684 { 685 struct linux_sys_tgkill_args /* { 686 syscallarg(int) tgid; 687 syscallarg(int) tid; 688 syscallarg(int) sig; 689 } */ *uap = v; 690 struct linux_sys_kill_args cup; 691 struct linux_emuldata *led; 692 struct proc *p; 693 694 SCARG(&cup, pid) = SCARG(uap, tid); 695 SCARG(&cup, signum) = SCARG(uap, sig); 696 697 if (SCARG(uap, tgid) == -1) 698 return linux_sys_kill(l, &cup, retval); 699 700 /* We use the PID as the TID, but make sure the group ID is right */ 701 if ((p = pfind(SCARG(uap, tid))) == NULL) 702 return ESRCH; 703 704 if (p->p_emul != &emul_linux) 705 return ESRCH; 706 707 led = p->p_emuldata; 708 709 if (led->s->group_pid != SCARG(uap, tgid)) 710 return ESRCH; 711 712 return linux_sys_kill(l, &cup, retval); 713 } 714 #endif /* LINUX_NPTL */ 715
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